[cip-dev] [PATCH 4.4.y-cip 00/83] Add RZ/G1C SD/eMMC support

[cip-dev] [PATCH 4.4.y-cip 00/83] Add RZ/G1C SD/eMMC support

[Biju Das]

This patch series add SD/eMMC support support for RZ/G1C sbc.

RZ/G1C eMMC IP is different from other RZ/G1 SoC's. It is having an 
internal DMA for data transfer which is similar to R-Car Gen3.

Support for internal DMAC is added in 4.14 kernel and support for 
RZ/G1C added on 4.20 kernel.

Backported the relevent patches to linux-4.4.y-cip.

This patch series is based on linux-4.4.y-cip and all the patches
in this series are cherry-picked from linux rc tree.

Ai Kyuse (3):
  mmc: tmio: enhance illegal sequence handling
  mmc: tmio: Add hw reset support
  mmc: tmio: Add tuning support

Arnd Bergmann (1):
  mmc: tmio_mmc_dma: don't print invalid DMA cookie

Ben Hutchings (2):
  mmc: tmio, sh_mobile_sdhi: Pass tmio_mmc_host ptr to clk_{enable,
    disable} ops
  mmc: tmio, sh_mobile_sdhi: Add support for variable input clock
    frequency

Chris Brandt (3):
  mmc: tmio-mmc: add support for 32bit data port
  mmc: sh_mobile_sdhi: add ocr_mask option
  mmc: tmio-mmc: fix bad pointer math

Fabrizio Castro (6):
  dt-bindings: mmc: renesas_sdhi: Add r8a77470 support
  mmc: renesas_sdhi: Add r8a77470 SDHI1 support
  ARM: dts: r8a77470: Add SDHI2 support
  ARM: dts: r8a77470: Add SDHI0 support
  ARM: dts: r8a77470: Add SDHI1 support
  ARM: dts: iwg23s-sbc: Add uSD and eMMC support

Masaharu Hayakawa (1):
  mmc: tmio: always get number of taps

Masahiro Yamada (1):
  mmc: renesas_sdhi: consolidate DMAC CONFIG options

Simon Horman (14):
  mmc: tmio: document mandatory and optional callbacks
  mmc: core: Add helper to see if a host can be retuned
  mmc: sh_mobile_sdhi: Add tuning support
  mmc: tmio: drop filenames from comment at top of source
  mmc: renesas-sdhi, tmio: make dma more modular
  mmc: tmio: rename tmio_mmc_{pio => core}.c
  mmc: renesas-sdhi: rename tmio_mmc_dma.c => renesas_sdhi_sys_dmac.c
  mmc: renesas-sdhi: rename sh_mobile_sdhi.c => renesas_sdhi_core.c
  mmc: renesas-sdhi: make renesas_sdhi_sys_dmac main module file
  mmc: renesas-sdhi: improve checkpatch cleanness
  mmc: tmio, renesas-sdhi: add dataend to DMA ops
  mmc: renesas-sdhi: add support for R-Car Gen3 SDHI DMAC
  dt-bindings: mmc: renesas_sdhi: add R-Car Gen[123] fallback
    compatibility strings
  mmc: renesas_sdhi: implement R-Car Gen[123] fallback compatibility
    strings

Ulf Hansson (2):
  mmc: tmio: Remove redundant runtime PM calls
  mmc: tmio: Remove redundant check of mmc->slot.cd_irq

Wolfram Sang (49):
  mmc: tmio_dma: remove debug messages with little information
  mmc: tmio: add flag to reduce delay after changing clock status
  mmc: tmio: remove stale comments
  mmc: tmio: refactor set_clock a little
  mmc: tmio: disable clock before changing it
  mmc: sdhi: use faster clock handling on RCar Gen2
  mmc: sdhi: error message on ENOMEM is superfluous
  mmc: sdhi: Add r8a7795 support
  mmc: tmio: Add UHS-I mode support
  mmc: sh_mobile_sdhi: Add UHS-I mode support
  mmc: tmio: always start clock after frequency calculation
  mmc: tmio: stop clock when 0Hz is requested
  mmc: sh_mobile_sdhi: remove obsolete irq_by_name registration
  mmc: tmio: remove now unneeded seperate irq handlers
  mmc: tmio: simplify irq handler
  mmc: tmio: merge distributed include files
  mmc: tmio: give read32/write32 functions more descriptive names
  mmc: tmio: use BIT() within defines
  mmc: tmio: use CTL_STATUS consistently
  mmc: tmio/sdhi: distinguish between SCLKDIVEN and ILL_FUNC
  mmc: tmio: document CTL_STATUS handling
  mmc: tmio/sdhi: introduce flag for RCar 2+ specific features
  mmc: sh_mobile_sdhi: make clk_update function more compact
  mmc: sh_mobile_sdhi: only change the clock on RCar Gen2+
  mmc: sh_mobile_sdhi: check return value when changing clk
  mmc: sh_mobile_sdhi: properly document R-Car versions
  mmc: host: sh_mobile_sdhi: move card_busy from tmio to sdhi
  mmc: host: sh_mobile_sdhi: don't populate unneeded functions
  mmc: tmio: add eMMC support
  mmc: add define for R1 response without CRC
  mmc: tmio: fix wrong bitmask for SDIO irqs
  mmc: tmio: remove SDIO from TODO list
  mmc: tmio: use SDIO master interrupt bit only when allowed
  mmc: sh_mobile_sdhi: simplify accessing DT data
  mmc: sh_mobile_sdhi: improve prerequisite for hw_reset
  mmc: sh_mobile_sdhi: remove superfluous check in hw_reset
  mmc: sh_mobile_sdhi: improve prerequisites for tuning
  mmc: sh_mobile_sdhi: remove superfluous check in SCC error check
  mmc: sh_mobile_sdhi: remove superfluous check in init_tuning
  mmc: sh_mobile_sdhi: enable HS200
  mmc: host: tmio: drop superfluous exit path
  mmc: host: tmio: disable clocks when unbinding
  mmc: host: tmio: refactor calls to sdio irq
  mmc: host: tmio: SDIO_STATUS_QUIRK is rather SDIO_STATUS_SETBITS
  mmc: tmio: discard obsolete SDIO irqs before enabling irqs
  mmc: tmio: ensure end of DMA and SD access are in sync
  mmc: host: tmio: use defines for CTL_STOP_INTERNAL_ACTION values
  mmc: host: tmio: don't BUG on unsupported stop commands
  mmc: host: tmio: fill in response from auto cmd12

Yoshihiro Shimoda (1):
  mmc: tmio, renesas-sdhi: add max_{segs, blk_count} to tmio_mmc_data

 Documentation/devicetree/bindings/mmc/tmio_mmc.txt |   12 +
 arch/arm/boot/dts/r8a77470-iwg23s-sbc.dts          |   75 ++
 arch/arm/boot/dts/r8a77470.dtsi                    |   38 +
 drivers/mmc/host/Kconfig                           |   21 +-
 drivers/mmc/host/Makefile                          |    6 +-
 drivers/mmc/host/renesas_sdhi.h                    |   41 +
 drivers/mmc/host/renesas_sdhi_core.c               |  632 +++++++++
 drivers/mmc/host/renesas_sdhi_internal_dmac.c      |  273 ++++
 drivers/mmc/host/renesas_sdhi_sys_dmac.c           |  480 +++++++
 drivers/mmc/host/sh_mobile_sdhi.c                  |  397 ------
 drivers/mmc/host/tmio_mmc.c                        |   10 +-
 drivers/mmc/host/tmio_mmc.h                        |  170 ++-
 drivers/mmc/host/tmio_mmc_core.c                   | 1399 ++++++++++++++++++++
 drivers/mmc/host/tmio_mmc_dma.c                    |  356 -----
 drivers/mmc/host/tmio_mmc_pio.c                    | 1275 ------------------
 include/linux/mfd/tmio.h                           |   13 +-
 include/linux/mmc/core.h                           |    3 +
 include/linux/mmc/host.h                           |    5 +
 include/linux/mmc/tmio.h                           |   66 -
 19 files changed, 3120 insertions(+), 2152 deletions(-)
 create mode 100644 drivers/mmc/host/renesas_sdhi.h
 create mode 100644 drivers/mmc/host/renesas_sdhi_core.c
 create mode 100644 drivers/mmc/host/renesas_sdhi_internal_dmac.c
 create mode 100644 drivers/mmc/host/renesas_sdhi_sys_dmac.c
 delete mode 100644 drivers/mmc/host/sh_mobile_sdhi.c
 create mode 100644 drivers/mmc/host/tmio_mmc_core.c
 delete mode 100644 drivers/mmc/host/tmio_mmc_dma.c
 delete mode 100644 drivers/mmc/host/tmio_mmc_pio.c
 delete mode 100644 include/linux/mmc/tmio.h

-- 
2.7.4

[cip-dev] [PATCH 4.4.y-cip 01/83] mmc: tmio_mmc_dma: don't print invalid DMA cookie

[Biju Das]

From: Arnd Bergmann <arnd@arndb.de>

commit d50f42384dbfcf5143de614710e132dc06cd2439 upstream.

The tmio_mmc_start_dma_{rx,tx} function functions contain debug
code that prints the dma cookie among other things. However,
in case we fall back to PIO mode for some reason, the cookie
variable is never initialized, and gcc warns about this:

In file included from ../include/linux/printk.h:277:0,
                 from ../include/linux/kernel.h:13,
                 from ../include/linux/list.h:8,
                 from ../include/linux/kobject.h:20,
                 from ../include/linux/device.h:17,
                 from ../drivers/mmc/host/tmio_mmc_dma.c:13:
../drivers/mmc/host/tmio_mmc_dma.c: In function 'tmio_mmc_start_dma':
../include/linux/dynamic_debug.h:86:3: warning: 'cookie' may be used uninitialized in this function [-Wmaybe-uninitialized]
   __dynamic_dev_dbg(&descriptor, dev, fmt, \
   ^
../drivers/mmc/host/tmio_mmc_dma.c:128:15: note: 'cookie' was declared here
  dma_cookie_t cookie;

This modifies the dev_dbg() statements so we only print the cookie
when we are already in the DMA path.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Biju Das <biju.das@bp.renesas.com>
---
 drivers/mmc/host/tmio_mmc_dma.c | 15 +++++++--------
 1 file changed, 7 insertions(+), 8 deletions(-)

diff --git a/drivers/mmc/host/tmio_mmc_dma.c b/drivers/mmc/host/tmio_mmc_dma.c
index e4b05db..4a0d6b8 100644
--- a/drivers/mmc/host/tmio_mmc_dma.c
+++ b/drivers/mmc/host/tmio_mmc_dma.c
@@ -94,9 +94,9 @@ static void tmio_mmc_start_dma_rx(struct tmio_mmc_host *host)
 			desc = NULL;
 			ret = cookie;
 		}
+		dev_dbg(&host->pdev->dev, "%s(): mapped %d -> %d, cookie %d, rq %p\n",
+			__func__, host->sg_len, ret, cookie, host->mrq);
 	}
-	dev_dbg(&host->pdev->dev, "%s(): mapped %d -> %d, cookie %d, rq %p\n",
-		__func__, host->sg_len, ret, cookie, host->mrq);
 
 pio:
 	if (!desc) {
@@ -116,8 +116,8 @@ pio:
 			 "DMA failed: %d, falling back to PIO\n", ret);
 	}
 
-	dev_dbg(&host->pdev->dev, "%s(): desc %p, cookie %d, sg[%d]\n", __func__,
-		desc, cookie, host->sg_len);
+	dev_dbg(&host->pdev->dev, "%s(): desc %p, sg[%d]\n", __func__,
+		desc, host->sg_len);
 }
 
 static void tmio_mmc_start_dma_tx(struct tmio_mmc_host *host)
@@ -174,9 +174,9 @@ static void tmio_mmc_start_dma_tx(struct tmio_mmc_host *host)
 			desc = NULL;
 			ret = cookie;
 		}
+		dev_dbg(&host->pdev->dev, "%s(): mapped %d -> %d, cookie %d, rq %p\n",
+			__func__, host->sg_len, ret, cookie, host->mrq);
 	}
-	dev_dbg(&host->pdev->dev, "%s(): mapped %d -> %d, cookie %d, rq %p\n",
-		__func__, host->sg_len, ret, cookie, host->mrq);
 
 pio:
 	if (!desc) {
@@ -196,8 +196,7 @@ pio:
 			 "DMA failed: %d, falling back to PIO\n", ret);
 	}
 
-	dev_dbg(&host->pdev->dev, "%s(): desc %p, cookie %d\n", __func__,
-		desc, cookie);
+	dev_dbg(&host->pdev->dev, "%s(): desc %p\n", __func__, desc);
 }
 
 void tmio_mmc_start_dma(struct tmio_mmc_host *host,
-- 
2.7.4

[cip-dev] [PATCH 4.4.y-cip 02/83] mmc: tmio_dma: remove debug messages with little information

[Biju Das]

From: Wolfram Sang <wsa+renesas@sang-engineering.com>

commit 254d1456560fa42d4ca901c9b9308e87c951fee1 upstream.

When compiling the driver with CONFIG_MMC_DEBUG set, I got build
warnings. They have been 'fixed' meanwhile. However, because these debug
messages look random anyhow (some duplicate information printed etc),
let's just drop them and rather re-add something consistent if that
should ever be needed.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Biju Das <biju.das@bp.renesas.com>
---
 drivers/mmc/host/tmio_mmc_dma.c | 11 -----------
 1 file changed, 11 deletions(-)

diff --git a/drivers/mmc/host/tmio_mmc_dma.c b/drivers/mmc/host/tmio_mmc_dma.c
index 4a0d6b8..6754358 100644
--- a/drivers/mmc/host/tmio_mmc_dma.c
+++ b/drivers/mmc/host/tmio_mmc_dma.c
@@ -94,10 +94,7 @@ static void tmio_mmc_start_dma_rx(struct tmio_mmc_host *host)
 			desc = NULL;
 			ret = cookie;
 		}
-		dev_dbg(&host->pdev->dev, "%s(): mapped %d -> %d, cookie %d, rq %p\n",
-			__func__, host->sg_len, ret, cookie, host->mrq);
 	}
-
 pio:
 	if (!desc) {
 		/* DMA failed, fall back to PIO */
@@ -115,9 +112,6 @@ pio:
 		dev_warn(&host->pdev->dev,
 			 "DMA failed: %d, falling back to PIO\n", ret);
 	}
-
-	dev_dbg(&host->pdev->dev, "%s(): desc %p, sg[%d]\n", __func__,
-		desc, host->sg_len);
 }
 
 static void tmio_mmc_start_dma_tx(struct tmio_mmc_host *host)
@@ -174,10 +168,7 @@ static void tmio_mmc_start_dma_tx(struct tmio_mmc_host *host)
 			desc = NULL;
 			ret = cookie;
 		}
-		dev_dbg(&host->pdev->dev, "%s(): mapped %d -> %d, cookie %d, rq %p\n",
-			__func__, host->sg_len, ret, cookie, host->mrq);
 	}
-
 pio:
 	if (!desc) {
 		/* DMA failed, fall back to PIO */
@@ -195,8 +186,6 @@ pio:
 		dev_warn(&host->pdev->dev,
 			 "DMA failed: %d, falling back to PIO\n", ret);
 	}
-
-	dev_dbg(&host->pdev->dev, "%s(): desc %p\n", __func__, desc);
 }
 
 void tmio_mmc_start_dma(struct tmio_mmc_host *host,
-- 
2.7.4

[cip-dev] [PATCH 4.4.y-cip 03/83] mmc: tmio: add flag to reduce delay after changing clock status

[Biju Das]

From: Wolfram Sang <wsa+renesas@sang-engineering.com>

commit 04e24b80a3ddf4cdf85e49a99d33aec27c9432ad upstream.

The docs for RCar Gen2 & 3 I have access to, mention delays of 5ms after
stop and 1ms after start. Make it possible to apply these values.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Biju Das <biju.das@bp.renesas.com>
---
 drivers/mmc/host/tmio_mmc_pio.c | 7 ++++---
 include/linux/mfd/tmio.h        | 4 ++++
 2 files changed, 8 insertions(+), 3 deletions(-)

diff --git a/drivers/mmc/host/tmio_mmc_pio.c b/drivers/mmc/host/tmio_mmc_pio.c
index 3c7c3a1..66c65fe 100644
--- a/drivers/mmc/host/tmio_mmc_pio.c
+++ b/drivers/mmc/host/tmio_mmc_pio.c
@@ -172,7 +172,8 @@ static void tmio_mmc_set_clock(struct tmio_mmc_host *host,
 		host->set_clk_div(host->pdev, (clk>>22) & 1);
 
 	sd_ctrl_write16(host, CTL_SD_CARD_CLK_CTL, clk & 0x1ff);
-	msleep(10);
+	if (!(host->pdata->flags & TMIO_MMC_FAST_CLK_CHG))
+		msleep(10);
 }
 
 static void tmio_mmc_clk_stop(struct tmio_mmc_host *host)
@@ -185,14 +186,14 @@ static void tmio_mmc_clk_stop(struct tmio_mmc_host *host)
 
 	sd_ctrl_write16(host, CTL_SD_CARD_CLK_CTL, ~0x0100 &
 		sd_ctrl_read16(host, CTL_SD_CARD_CLK_CTL));
-	msleep(10);
+	msleep(host->pdata->flags & TMIO_MMC_FAST_CLK_CHG ? 5 : 10);
 }
 
 static void tmio_mmc_clk_start(struct tmio_mmc_host *host)
 {
 	sd_ctrl_write16(host, CTL_SD_CARD_CLK_CTL, 0x0100 |
 		sd_ctrl_read16(host, CTL_SD_CARD_CLK_CTL));
-	msleep(10);
+	msleep(host->pdata->flags & TMIO_MMC_FAST_CLK_CHG ? 1 : 10);
 
 	/* implicit BUG_ON(!res) */
 	if (host->pdata->flags & TMIO_MMC_HAVE_HIGH_REG) {
diff --git a/include/linux/mfd/tmio.h b/include/linux/mfd/tmio.h
index 24b86d5..05d58ee 100644
--- a/include/linux/mfd/tmio.h
+++ b/include/linux/mfd/tmio.h
@@ -65,6 +65,10 @@
  * Some controllers can support SDIO IRQ signalling.
  */
 #define TMIO_MMC_SDIO_IRQ		(1 << 2)
+
+/* Some controllers don't need to wait 10ms for clock changes */
+#define TMIO_MMC_FAST_CLK_CHG		(1 << 3)
+
 /*
  * Some controllers require waiting for the SD bus to become
  * idle before writing to some registers.
-- 
2.7.4

[cip-dev] [PATCH 4.4.y-cip 04/83] mmc: tmio: remove stale comments

[Biju Das]

From: Wolfram Sang <wsa+renesas@sang-engineering.com>

commit 6d2bcbe5d1ee44271b30d445b55c49219b33fc6e upstream.

These don't make sense anymore. Since commit 5d60e500541ed1 ("mmc: tmio:
add new TMIO_MMC_HAVE_HIGH_REG flags"), we don't deal with a resource
here.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Biju Das <biju.das@bp.renesas.com>
---
 drivers/mmc/host/tmio_mmc_pio.c | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/drivers/mmc/host/tmio_mmc_pio.c b/drivers/mmc/host/tmio_mmc_pio.c
index 66c65fe..99df39a 100644
--- a/drivers/mmc/host/tmio_mmc_pio.c
+++ b/drivers/mmc/host/tmio_mmc_pio.c
@@ -178,7 +178,6 @@ static void tmio_mmc_set_clock(struct tmio_mmc_host *host,
 
 static void tmio_mmc_clk_stop(struct tmio_mmc_host *host)
 {
-	/* implicit BUG_ON(!res) */
 	if (host->pdata->flags & TMIO_MMC_HAVE_HIGH_REG) {
 		sd_ctrl_write16(host, CTL_CLK_AND_WAIT_CTL, 0x0000);
 		msleep(10);
@@ -195,7 +194,6 @@ static void tmio_mmc_clk_start(struct tmio_mmc_host *host)
 		sd_ctrl_read16(host, CTL_SD_CARD_CLK_CTL));
 	msleep(host->pdata->flags & TMIO_MMC_FAST_CLK_CHG ? 1 : 10);
 
-	/* implicit BUG_ON(!res) */
 	if (host->pdata->flags & TMIO_MMC_HAVE_HIGH_REG) {
 		sd_ctrl_write16(host, CTL_CLK_AND_WAIT_CTL, 0x0100);
 		msleep(10);
@@ -206,7 +204,6 @@ static void tmio_mmc_reset(struct tmio_mmc_host *host)
 {
 	/* FIXME - should we set stop clock reg here */
 	sd_ctrl_write16(host, CTL_RESET_SD, 0x0000);
-	/* implicit BUG_ON(!res) */
 	if (host->pdata->flags & TMIO_MMC_HAVE_HIGH_REG)
 		sd_ctrl_write16(host, CTL_RESET_SDIO, 0x0000);
 	msleep(10);
-- 
2.7.4

[cip-dev] [PATCH 4.4.y-cip 05/83] mmc: tmio: refactor set_clock a little

[Biju Das]

From: Wolfram Sang <wsa+renesas@sang-engineering.com>

commit bf96208f0539d2009ca0b031da2ed7c430edc3a2 upstream.

Some of the indentation made the code awful to read. Fix that. Also,
introduce defines instead of magic hex values. Note that this includes
one change: We mask out know 0xff instead of 0x1ff. But 0x100 has always
been the clock enable bit. It doesn't make any sense to set it depending
on the clock calculation. Update copyright notices, too. I'll be working
on those files some more in the future.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Biju Das <biju.das@bp.renesas.com>
---
 drivers/mmc/host/tmio_mmc_pio.c | 15 +++++++++------
 include/linux/mmc/tmio.h        |  5 +++++
 2 files changed, 14 insertions(+), 6 deletions(-)

diff --git a/drivers/mmc/host/tmio_mmc_pio.c b/drivers/mmc/host/tmio_mmc_pio.c
index 99df39a..bb09b51 100644
--- a/drivers/mmc/host/tmio_mmc_pio.c
+++ b/drivers/mmc/host/tmio_mmc_pio.c
@@ -1,6 +1,8 @@
 /*
  * linux/drivers/mmc/host/tmio_mmc_pio.c
  *
+ * Copyright (C) 2016 Sang Engineering, Wolfram Sang
+ * Copyright (C) 2015-16 Renesas Electronics Corporation
  * Copyright (C) 2011 Guennadi Liakhovetski
  * Copyright (C) 2007 Ian Molton
  * Copyright (C) 2004 Ian Molton
@@ -159,19 +161,20 @@ static void tmio_mmc_set_clock(struct tmio_mmc_host *host,
 
 	if (new_clock) {
 		for (clock = host->mmc->f_min, clk = 0x80000080;
-			new_clock >= (clock<<1); clk >>= 1)
+		     new_clock >= (clock << 1);
+		     clk >>= 1)
 			clock <<= 1;
 
 		/* 1/1 clock is option */
 		if ((host->pdata->flags & TMIO_MMC_CLK_ACTUAL) &&
-		    ((clk >> 22) & 0x1))
+		   ((clk >> 22) & 0x1))
 			clk |= 0xff;
 	}
 
 	if (host->set_clk_div)
-		host->set_clk_div(host->pdev, (clk>>22) & 1);
+		host->set_clk_div(host->pdev, (clk >> 22) & 1);
 
-	sd_ctrl_write16(host, CTL_SD_CARD_CLK_CTL, clk & 0x1ff);
+	sd_ctrl_write16(host, CTL_SD_CARD_CLK_CTL, clk & CLK_CTL_DIV_MASK);
 	if (!(host->pdata->flags & TMIO_MMC_FAST_CLK_CHG))
 		msleep(10);
 }
@@ -183,14 +186,14 @@ static void tmio_mmc_clk_stop(struct tmio_mmc_host *host)
 		msleep(10);
 	}
 
-	sd_ctrl_write16(host, CTL_SD_CARD_CLK_CTL, ~0x0100 &
+	sd_ctrl_write16(host, CTL_SD_CARD_CLK_CTL, ~CLK_CTL_SCLKEN &
 		sd_ctrl_read16(host, CTL_SD_CARD_CLK_CTL));
 	msleep(host->pdata->flags & TMIO_MMC_FAST_CLK_CHG ? 5 : 10);
 }
 
 static void tmio_mmc_clk_start(struct tmio_mmc_host *host)
 {
-	sd_ctrl_write16(host, CTL_SD_CARD_CLK_CTL, 0x0100 |
+	sd_ctrl_write16(host, CTL_SD_CARD_CLK_CTL, CLK_CTL_SCLKEN |
 		sd_ctrl_read16(host, CTL_SD_CARD_CLK_CTL));
 	msleep(host->pdata->flags & TMIO_MMC_FAST_CLK_CHG ? 1 : 10);
 
diff --git a/include/linux/mmc/tmio.h b/include/linux/mmc/tmio.h
index 84d9053..5f5cd80 100644
--- a/include/linux/mmc/tmio.h
+++ b/include/linux/mmc/tmio.h
@@ -1,6 +1,8 @@
 /*
  * include/linux/mmc/tmio.h
  *
+ * Copyright (C) 2016 Sang Engineering, Wolfram Sang
+ * Copyright (C) 2015-16 Renesas Electronics Corporation
  * Copyright (C) 2007 Ian Molton
  * Copyright (C) 2004 Ian Molton
  *
@@ -61,6 +63,9 @@
 #define TMIO_STAT_CMD_BUSY      0x40000000
 #define TMIO_STAT_ILL_ACCESS    0x80000000
 
+#define	CLK_CTL_DIV_MASK	0xff
+#define	CLK_CTL_SCLKEN		BIT(8)
+
 #define TMIO_BBS		512		/* Boot block size */
 
 #endif /* LINUX_MMC_TMIO_H */
-- 
2.7.4

[cip-dev] [PATCH 4.4.y-cip 06/83] mmc: tmio: disable clock before changing it

[Biju Das]

From: Wolfram Sang <wsa+renesas@sang-engineering.com>

commit 14d5828f4ebbfbe8e07d4d01eb85a684a9290243 upstream.

Rcar2 & 3 docs state that for going to and coming from the 0xff setting,
the clock must first be disabled before the DIV bits are changed.
Instead of tracking this, let's just do this unconditionally.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Biju Das <biju.das@bp.renesas.com>
---
 drivers/mmc/host/tmio_mmc_pio.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/mmc/host/tmio_mmc_pio.c b/drivers/mmc/host/tmio_mmc_pio.c
index bb09b51..2a3bbfd 100644
--- a/drivers/mmc/host/tmio_mmc_pio.c
+++ b/drivers/mmc/host/tmio_mmc_pio.c
@@ -174,6 +174,8 @@ static void tmio_mmc_set_clock(struct tmio_mmc_host *host,
 	if (host->set_clk_div)
 		host->set_clk_div(host->pdev, (clk >> 22) & 1);
 
+	sd_ctrl_write16(host, CTL_SD_CARD_CLK_CTL, ~CLK_CTL_SCLKEN &
+			sd_ctrl_read16(host, CTL_SD_CARD_CLK_CTL));
 	sd_ctrl_write16(host, CTL_SD_CARD_CLK_CTL, clk & CLK_CTL_DIV_MASK);
 	if (!(host->pdata->flags & TMIO_MMC_FAST_CLK_CHG))
 		msleep(10);
-- 
2.7.4

[cip-dev] [PATCH 4.4.y-cip 07/83] mmc: sdhi: use faster clock handling on RCar Gen2

[Biju Das]

From: Wolfram Sang <wsa+renesas@sang-engineering.com>

commit 16a655248965cd04db3e6616a47231fecbf87839 upstream.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Biju Das <biju.das@bp.renesas.com>
---
 drivers/mmc/host/sh_mobile_sdhi.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/mmc/host/sh_mobile_sdhi.c b/drivers/mmc/host/sh_mobile_sdhi.c
index e43aff4..fd6a0e2 100644
--- a/drivers/mmc/host/sh_mobile_sdhi.c
+++ b/drivers/mmc/host/sh_mobile_sdhi.c
@@ -59,7 +59,7 @@ static const struct sh_mobile_sdhi_of_data of_rcar_gen1_compatible = {
 
 static const struct sh_mobile_sdhi_of_data of_rcar_gen2_compatible = {
 	.tmio_flags	= TMIO_MMC_HAS_IDLE_WAIT | TMIO_MMC_WRPROTECT_DISABLE |
-			  TMIO_MMC_CLK_ACTUAL,
+			  TMIO_MMC_CLK_ACTUAL | TMIO_MMC_FAST_CLK_CHG,
 	.capabilities	= MMC_CAP_SD_HIGHSPEED | MMC_CAP_SDIO_IRQ,
 	.dma_buswidth	= DMA_SLAVE_BUSWIDTH_4_BYTES,
 	.dma_rx_offset	= 0x2000,
-- 
2.7.4

[cip-dev] [PATCH 4.4.y-cip 08/83] mmc: sdhi: error message on ENOMEM is superfluous

[Biju Das]

From: Wolfram Sang <wsa+renesas@sang-engineering.com>

commit 2bf8ab6ba23483a49d29a726d047f3be81ccc952 upstream.

We will get a full dump anyhow.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Biju Das <biju.das@bp.renesas.com>
---
 drivers/mmc/host/sh_mobile_sdhi.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/drivers/mmc/host/sh_mobile_sdhi.c b/drivers/mmc/host/sh_mobile_sdhi.c
index fd6a0e2..bf6c3ac 100644
--- a/drivers/mmc/host/sh_mobile_sdhi.c
+++ b/drivers/mmc/host/sh_mobile_sdhi.c
@@ -215,10 +215,8 @@ static int sh_mobile_sdhi_probe(struct platform_device *pdev)
 		return -EINVAL;
 
 	priv = devm_kzalloc(&pdev->dev, sizeof(struct sh_mobile_sdhi), GFP_KERNEL);
-	if (priv == NULL) {
-		dev_err(&pdev->dev, "kzalloc failed\n");
+	if (!priv)
 		return -ENOMEM;
-	}
 
 	mmc_data = &priv->mmc_data;
 	dma_priv = &priv->dma_priv;
-- 
2.7.4

[cip-dev] [PATCH 4.4.y-cip 09/83] mmc: sdhi: Add r8a7795 support

[Biju Das]

From: Wolfram Sang <wsa+renesas@sang-engineering.com>

commit a72e8b170069e98e1f5ca2a2855ee399148a9152 upstream.

Registers are 64bit apart, so we refactor bus_shift handling a little and set
it based on the DT compatible. Also, EXT_ACC is different. It has been tested
on a Salvator-X (Gen3) and, to check for regressions, on a Lager (Gen2).

Signed-off-by: Ai Kyuse <ai.kyuse.uw@renesas.com>
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Biju Das <biju.das@bp.renesas.com>
[ Removed Kconfig changes, binding and compatible option ]
---
 drivers/mmc/host/sh_mobile_sdhi.c | 46 ++++++++++++++++++++++++++++-----------
 1 file changed, 33 insertions(+), 13 deletions(-)

diff --git a/drivers/mmc/host/sh_mobile_sdhi.c b/drivers/mmc/host/sh_mobile_sdhi.c
index bf6c3ac..90d042d 100644
--- a/drivers/mmc/host/sh_mobile_sdhi.c
+++ b/drivers/mmc/host/sh_mobile_sdhi.c
@@ -1,6 +1,8 @@
 /*
  * SuperH Mobile SDHI
  *
+ * Copyright (C) 2016 Sang Engineering, Wolfram Sang
+ * Copyright (C) 2015-16 Renesas Electronics Corporation
  * Copyright (C) 2009 Magnus Damm
  *
  * This program is free software; you can redistribute it and/or modify
@@ -43,6 +45,7 @@ struct sh_mobile_sdhi_of_data {
 	unsigned long capabilities2;
 	enum dma_slave_buswidth dma_buswidth;
 	dma_addr_t dma_rx_offset;
+	unsigned bus_shift;
 };
 
 static const struct sh_mobile_sdhi_of_data sh_mobile_sdhi_of_cfg[] = {
@@ -65,6 +68,13 @@ static const struct sh_mobile_sdhi_of_data of_rcar_gen2_compatible = {
 	.dma_rx_offset	= 0x2000,
 };
 
+static const struct sh_mobile_sdhi_of_data of_rcar_gen3_compatible = {
+	.tmio_flags	= TMIO_MMC_HAS_IDLE_WAIT | TMIO_MMC_WRPROTECT_DISABLE |
+			  TMIO_MMC_CLK_ACTUAL | TMIO_MMC_FAST_CLK_CHG,
+	.capabilities	= MMC_CAP_SD_HIGHSPEED,
+	.bus_shift	= 2,
+};
+
 static const struct of_device_id sh_mobile_sdhi_of_match[] = {
 	{ .compatible = "renesas,sdhi-shmobile" },
 	{ .compatible = "renesas,sdhi-sh7372" },
@@ -105,6 +115,15 @@ static void sh_mobile_sdhi_sdbuf_width(struct tmio_mmc_host *host, int width)
 	case 0xCB0D:
 		val = (width == 32) ? 0x0000 : 0x0001;
 		break;
+	case 0xCC10: /* Gen3, SD only */
+	case 0xCD10: /* Gen3, SD + MMC */
+		if (width == 64)
+			val = 0x0000;
+		else if (width == 32)
+			val = 0x0101;
+		else
+			val = 0x0001;
+		break;
 	default:
 		/* nothing to do */
 		return;
@@ -234,16 +253,26 @@ static int sh_mobile_sdhi_probe(struct platform_device *pdev)
 		goto eprobe;
 	}
 
+	if (of_id && of_id->data) {
+		const struct sh_mobile_sdhi_of_data *of_data = of_id->data;
+
+		mmc_data->flags |= of_data->tmio_flags;
+		mmc_data->capabilities |= of_data->capabilities;
+		mmc_data->capabilities2 |= of_data->capabilities2;
+		mmc_data->dma_rx_offset = of_data->dma_rx_offset;
+		dma_priv->dma_buswidth = of_data->dma_buswidth;
+		host->bus_shift = of_data->bus_shift;
+	}
+
 	host->dma		= dma_priv;
 	host->write16_hook	= sh_mobile_sdhi_write16_hook;
 	host->clk_enable	= sh_mobile_sdhi_clk_enable;
 	host->clk_disable	= sh_mobile_sdhi_clk_disable;
 	host->multi_io_quirk	= sh_mobile_sdhi_multi_io_quirk;
-	/* SD control register space size is 0x100, 0x200 for bus_shift=1 */
-	if (resource_size(res) > 0x100)
+
+	/* Orginally registers were 16 bit apart, could be 32 or 64 nowadays */
+	if (!host->bus_shift && resource_size(res) > 0x100) /* old way to determine the shift */
 		host->bus_shift = 1;
-	else
-		host->bus_shift = 0;
 
 	if (mmd)
 		*mmc_data = *mmd;
@@ -275,15 +304,6 @@ static int sh_mobile_sdhi_probe(struct platform_device *pdev)
 	 */
 	mmc_data->flags |= TMIO_MMC_SDIO_STATUS_QUIRK;
 
-	if (of_id && of_id->data) {
-		const struct sh_mobile_sdhi_of_data *of_data = of_id->data;
-		mmc_data->flags |= of_data->tmio_flags;
-		mmc_data->capabilities |= of_data->capabilities;
-		mmc_data->capabilities2 |= of_data->capabilities2;
-		mmc_data->dma_rx_offset = of_data->dma_rx_offset;
-		dma_priv->dma_buswidth = of_data->dma_buswidth;
-	}
-
 	ret = tmio_mmc_host_probe(host, mmc_data);
 	if (ret < 0)
 		goto efree;
-- 
2.7.4

[cip-dev] [PATCH 4.4.y-cip 10/83] mmc: tmio, sh_mobile_sdhi: Pass tmio_mmc_host ptr to clk_{enable, disable} ops

[Biju Das]

From: Ben Hutchings <ben.hutchings@codethink.co.uk>

commit 0ea28210c15680bbabc3d6079f771f1a1e69509a upstream.

Change the clk_enable operation to take a pointer to the struct
tmio_mmc_host and have it set f_max.  For consistency, also change the
clk_disable operation to take a pointer to struct tmio_mmc_host.

Signed-off-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Biju Das <biju.das@bp.renesas.com>
---
 drivers/mmc/host/sh_mobile_sdhi.c | 12 +++++-------
 drivers/mmc/host/tmio_mmc.h       |  4 ++--
 drivers/mmc/host/tmio_mmc_pio.c   |  4 ++--
 3 files changed, 9 insertions(+), 11 deletions(-)

diff --git a/drivers/mmc/host/sh_mobile_sdhi.c b/drivers/mmc/host/sh_mobile_sdhi.c
index 90d042d..3b9cd2b 100644
--- a/drivers/mmc/host/sh_mobile_sdhi.c
+++ b/drivers/mmc/host/sh_mobile_sdhi.c
@@ -132,16 +132,15 @@ static void sh_mobile_sdhi_sdbuf_width(struct tmio_mmc_host *host, int width)
 	sd_ctrl_write16(host, EXT_ACC, val);
 }
 
-static int sh_mobile_sdhi_clk_enable(struct platform_device *pdev, unsigned int *f)
+static int sh_mobile_sdhi_clk_enable(struct tmio_mmc_host *host)
 {
-	struct mmc_host *mmc = platform_get_drvdata(pdev);
-	struct tmio_mmc_host *host = mmc_priv(mmc);
+	struct mmc_host *mmc = host->mmc;
 	struct sh_mobile_sdhi *priv = host_to_priv(host);
 	int ret = clk_prepare_enable(priv->clk);
 	if (ret < 0)
 		return ret;
 
-	*f = clk_get_rate(priv->clk);
+	mmc->f_max = clk_get_rate(priv->clk);
 
 	/* enable 16bit data access on SDBUF as default */
 	sh_mobile_sdhi_sdbuf_width(host, 16);
@@ -149,11 +148,10 @@ static int sh_mobile_sdhi_clk_enable(struct platform_device *pdev, unsigned int
 	return 0;
 }
 
-static void sh_mobile_sdhi_clk_disable(struct platform_device *pdev)
+static void sh_mobile_sdhi_clk_disable(struct tmio_mmc_host *host)
 {
-	struct mmc_host *mmc = platform_get_drvdata(pdev);
-	struct tmio_mmc_host *host = mmc_priv(mmc);
 	struct sh_mobile_sdhi *priv = host_to_priv(host);
+
 	clk_disable_unprepare(priv->clk);
 }
 
diff --git a/drivers/mmc/host/tmio_mmc.h b/drivers/mmc/host/tmio_mmc.h
index 4a597f5a..68fd8d7 100644
--- a/drivers/mmc/host/tmio_mmc.h
+++ b/drivers/mmc/host/tmio_mmc.h
@@ -95,8 +95,8 @@ struct tmio_mmc_host {
 	bool			sdio_irq_enabled;
 
 	int (*write16_hook)(struct tmio_mmc_host *host, int addr);
-	int (*clk_enable)(struct platform_device *pdev, unsigned int *f);
-	void (*clk_disable)(struct platform_device *pdev);
+	int (*clk_enable)(struct tmio_mmc_host *host);
+	void (*clk_disable)(struct tmio_mmc_host *host);
 	int (*multi_io_quirk)(struct mmc_card *card,
 			      unsigned int direction, int blk_size);
 };
diff --git a/drivers/mmc/host/tmio_mmc_pio.c b/drivers/mmc/host/tmio_mmc_pio.c
index 2a3bbfd..f7a9fa6 100644
--- a/drivers/mmc/host/tmio_mmc_pio.c
+++ b/drivers/mmc/host/tmio_mmc_pio.c
@@ -843,7 +843,7 @@ static int tmio_mmc_clk_update(struct tmio_mmc_host *host)
 	if (!host->clk_enable)
 		return -ENOTSUPP;
 
-	ret = host->clk_enable(host->pdev, &mmc->f_max);
+	ret = host->clk_enable(host);
 	if (!ret)
 		mmc->f_min = mmc->f_max / 512;
 
@@ -1249,7 +1249,7 @@ int tmio_mmc_host_runtime_suspend(struct device *dev)
 		tmio_mmc_clk_stop(host);
 
 	if (host->clk_disable)
-		host->clk_disable(host->pdev);
+		host->clk_disable(host);
 
 	return 0;
 }
-- 
2.7.4

[cip-dev] [PATCH 4.4.y-cip 11/83] mmc: tmio, sh_mobile_sdhi: Add support for variable input clock frequency

[Biju Das]

From: Ben Hutchings <ben.hutchings@codethink.co.uk>

commit 2fb55956ce4db259a5d6ce41cc32368b5055575e upstream.

Currently tmio_mmc assumes that the input clock frequency is fixed and
only its own clock divider can be changed.  This is not true in the
case of sh_mobile_sdhi; we can use the clock API to change it.

In tmio_mmc:
- Delegate setting of f_min from tmio to the clk_enable operation (if
  implemented), as it can be smaller than f_max / 512
- Add an optional clk_update operation called from tmio_mmc_set_clock()
  that updates the input clock frequency
- Rename tmio_mmc_clk_update() to tmio_mmc_clk_enable(), to avoid
  confusion with the clk_update operation

In sh_mobile_sdhi:
- Make the setting of f_max conditional; it should be set through the
  max-frequency property in the device tree in future
- Set f_min based on the input clock's minimum frequency
- Implement the clk_update operation, selecting the best input clock
  frequency for the bus frequency that's wanted

sh_mobile_sdhi_clk_update() is loosely based on Kuninori Morimoto's work
in sh_mmcif.

Signed-off-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Biju Das <biju.das@bp.renesas.com>
---
 drivers/mmc/host/sh_mobile_sdhi.c | 56 +++++++++++++++++++++++++++++++++++++--
 drivers/mmc/host/tmio_mmc.h       |  2 ++
 drivers/mmc/host/tmio_mmc_pio.c   | 24 +++++++----------
 3 files changed, 66 insertions(+), 16 deletions(-)

diff --git a/drivers/mmc/host/sh_mobile_sdhi.c b/drivers/mmc/host/sh_mobile_sdhi.c
index 3b9cd2b..51e49eb 100644
--- a/drivers/mmc/host/sh_mobile_sdhi.c
+++ b/drivers/mmc/host/sh_mobile_sdhi.c
@@ -140,7 +140,20 @@ static int sh_mobile_sdhi_clk_enable(struct tmio_mmc_host *host)
 	if (ret < 0)
 		return ret;
 
-	mmc->f_max = clk_get_rate(priv->clk);
+	/*
+	 * The clock driver may not know what maximum frequency
+	 * actually works, so it should be set with the max-frequency
+	 * property which will already have been read to f_max.  If it
+	 * was missing, assume the current frequency is the maximum.
+	 */
+	if (!mmc->f_max)
+		mmc->f_max = clk_get_rate(priv->clk);
+
+	/*
+	 * Minimum frequency is the minimum input clock frequency
+	 * divided by our maximum divider.
+	 */
+	mmc->f_min = max(clk_round_rate(priv->clk, 1) / 512, 1L);
 
 	/* enable 16bit data access on SDBUF as default */
 	sh_mobile_sdhi_sdbuf_width(host, 16);
@@ -148,6 +161,44 @@ static int sh_mobile_sdhi_clk_enable(struct tmio_mmc_host *host)
 	return 0;
 }
 
+static unsigned int sh_mobile_sdhi_clk_update(struct tmio_mmc_host *host,
+					      unsigned int new_clock)
+{
+	struct sh_mobile_sdhi *priv = host_to_priv(host);
+	unsigned int freq, best_freq, diff_min, diff;
+	int i;
+
+	diff_min = ~0;
+	best_freq = 0;
+
+	/*
+	 * We want the bus clock to be as close as possible to, but no
+	 * greater than, new_clock.  As we can divide by 1 << i for
+	 * any i in [0, 9] we want the input clock to be as close as
+	 * possible, but no greater than, new_clock << i.
+	 */
+	for (i = min(9, ilog2(UINT_MAX / new_clock)); i >= 0; i--) {
+		freq = clk_round_rate(priv->clk, new_clock << i);
+		if (freq > (new_clock << i)) {
+			/* Too fast; look for a slightly slower option */
+			freq = clk_round_rate(priv->clk,
+					      (new_clock << i) / 4 * 3);
+			if (freq > (new_clock << i))
+				continue;
+		}
+
+		diff = new_clock - (freq >> i);
+		if (diff <= diff_min) {
+			best_freq = freq;
+			diff_min = diff;
+		}
+	}
+
+	clk_set_rate(priv->clk, best_freq);
+
+	return best_freq;
+}
+
 static void sh_mobile_sdhi_clk_disable(struct tmio_mmc_host *host)
 {
 	struct sh_mobile_sdhi *priv = host_to_priv(host);
@@ -265,6 +316,7 @@ static int sh_mobile_sdhi_probe(struct platform_device *pdev)
 	host->dma		= dma_priv;
 	host->write16_hook	= sh_mobile_sdhi_write16_hook;
 	host->clk_enable	= sh_mobile_sdhi_clk_enable;
+	host->clk_update	= sh_mobile_sdhi_clk_update;
 	host->clk_disable	= sh_mobile_sdhi_clk_disable;
 	host->multi_io_quirk	= sh_mobile_sdhi_multi_io_quirk;
 
@@ -362,7 +414,7 @@ static int sh_mobile_sdhi_probe(struct platform_device *pdev)
 		}
 	}
 
-	dev_info(&pdev->dev, "%s base at 0x%08lx clock rate %u MHz\n",
+	dev_info(&pdev->dev, "%s base at 0x%08lx max clock rate %u MHz\n",
 		 mmc_hostname(host->mmc), (unsigned long)
 		 (platform_get_resource(pdev, IORESOURCE_MEM, 0)->start),
 		 host->mmc->f_max / 1000000);
diff --git a/drivers/mmc/host/tmio_mmc.h b/drivers/mmc/host/tmio_mmc.h
index 68fd8d7..b44b589 100644
--- a/drivers/mmc/host/tmio_mmc.h
+++ b/drivers/mmc/host/tmio_mmc.h
@@ -96,6 +96,8 @@ struct tmio_mmc_host {
 
 	int (*write16_hook)(struct tmio_mmc_host *host, int addr);
 	int (*clk_enable)(struct tmio_mmc_host *host);
+	unsigned int (*clk_update)(struct tmio_mmc_host *host,
+				   unsigned int new_clock);
 	void (*clk_disable)(struct tmio_mmc_host *host);
 	int (*multi_io_quirk)(struct mmc_card *card,
 			      unsigned int direction, int blk_size);
diff --git a/drivers/mmc/host/tmio_mmc_pio.c b/drivers/mmc/host/tmio_mmc_pio.c
index f7a9fa6..d34de57 100644
--- a/drivers/mmc/host/tmio_mmc_pio.c
+++ b/drivers/mmc/host/tmio_mmc_pio.c
@@ -160,9 +160,12 @@ static void tmio_mmc_set_clock(struct tmio_mmc_host *host,
 	u32 clk = 0, clock;
 
 	if (new_clock) {
-		for (clock = host->mmc->f_min, clk = 0x80000080;
-		     new_clock >= (clock << 1);
-		     clk >>= 1)
+		if (host->clk_update)
+			clock = host->clk_update(host, new_clock) / 512;
+		else
+			clock = host->mmc->f_min;
+
+		for (clk = 0x80000080; new_clock >= (clock << 1); clk >>= 1)
 			clock <<= 1;
 
 		/* 1/1 clock is option */
@@ -835,19 +838,12 @@ fail:
 	pm_runtime_put_autosuspend(mmc_dev(mmc));
 }
 
-static int tmio_mmc_clk_update(struct tmio_mmc_host *host)
+static int tmio_mmc_clk_enable(struct tmio_mmc_host *host)
 {
-	struct mmc_host *mmc = host->mmc;
-	int ret;
-
 	if (!host->clk_enable)
 		return -ENOTSUPP;
 
-	ret = host->clk_enable(host);
-	if (!ret)
-		mmc->f_min = mmc->f_max / 512;
-
-	return ret;
+	return host->clk_enable(host);
 }
 
 static void tmio_mmc_power_on(struct tmio_mmc_host *host, unsigned short vdd)
@@ -1133,7 +1129,7 @@ int tmio_mmc_host_probe(struct tmio_mmc_host *_host,
 				  mmc->caps & MMC_CAP_NONREMOVABLE ||
 				  mmc->slot.cd_irq >= 0);
 
-	if (tmio_mmc_clk_update(_host) < 0) {
+	if (tmio_mmc_clk_enable(_host) < 0) {
 		mmc->f_max = pdata->hclk;
 		mmc->f_min = mmc->f_max / 512;
 	}
@@ -1261,7 +1257,7 @@ int tmio_mmc_host_runtime_resume(struct device *dev)
 	struct tmio_mmc_host *host = mmc_priv(mmc);
 
 	tmio_mmc_reset(host);
-	tmio_mmc_clk_update(host);
+	tmio_mmc_clk_enable(host);
 
 	if (host->clk_cache) {
 		tmio_mmc_set_clock(host, host->clk_cache);
-- 
2.7.4

[cip-dev] [PATCH 4.4.y-cip 12/83] mmc: tmio: Add UHS-I mode support

[Biju Das]

From: Wolfram Sang <wsa+renesas@sang-engineering.com>

commit 452e5eef6d311e52f657b34d999758107ec3dd4a upstream.

Based on work by Shinobu Uehara and Ben Dooks. This adds the voltage
switch operation needed for all UHS-I modes, but not the tuning needed
for SDR-104 which will come later.

Signed-off-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Biju Das <biju.das@bp.renesas.com>
---
 drivers/mmc/host/tmio_mmc.h     |  2 ++
 drivers/mmc/host/tmio_mmc_pio.c | 12 +++++++++++-
 include/linux/mmc/tmio.h        |  2 ++
 3 files changed, 15 insertions(+), 1 deletion(-)

diff --git a/drivers/mmc/host/tmio_mmc.h b/drivers/mmc/host/tmio_mmc.h
index b44b589..b1819c7 100644
--- a/drivers/mmc/host/tmio_mmc.h
+++ b/drivers/mmc/host/tmio_mmc.h
@@ -101,6 +101,8 @@ struct tmio_mmc_host {
 	void (*clk_disable)(struct tmio_mmc_host *host);
 	int (*multi_io_quirk)(struct mmc_card *card,
 			      unsigned int direction, int blk_size);
+	int (*start_signal_voltage_switch)(struct mmc_host *mmc,
+					   struct mmc_ios *ios);
 };
 
 struct tmio_mmc_host *tmio_mmc_host_alloc(struct platform_device *pdev);
diff --git a/drivers/mmc/host/tmio_mmc_pio.c b/drivers/mmc/host/tmio_mmc_pio.c
index d34de57..1935706 100644
--- a/drivers/mmc/host/tmio_mmc_pio.c
+++ b/drivers/mmc/host/tmio_mmc_pio.c
@@ -1010,12 +1010,20 @@ static int tmio_multi_io_quirk(struct mmc_card *card,
 	return blk_size;
 }
 
-static const struct mmc_host_ops tmio_mmc_ops = {
+static int tmio_mmc_card_busy(struct mmc_host *mmc)
+{
+	struct tmio_mmc_host *host = mmc_priv(mmc);
+
+	return !(sd_ctrl_read32(host, CTL_STATUS2) & TMIO_STATUS2_DAT0);
+}
+
+static struct mmc_host_ops tmio_mmc_ops = {
 	.request	= tmio_mmc_request,
 	.set_ios	= tmio_mmc_set_ios,
 	.get_ro         = tmio_mmc_get_ro,
 	.get_cd		= mmc_gpio_get_cd,
 	.enable_sdio_irq = tmio_mmc_enable_sdio_irq,
+	.card_busy	= tmio_mmc_card_busy,
 	.multi_io_quirk	= tmio_multi_io_quirk,
 };
 
@@ -1114,7 +1122,9 @@ int tmio_mmc_host_probe(struct tmio_mmc_host *_host,
 		goto host_free;
 	}
 
+	tmio_mmc_ops.start_signal_voltage_switch = _host->start_signal_voltage_switch;
 	mmc->ops = &tmio_mmc_ops;
+
 	mmc->caps |= MMC_CAP_4_BIT_DATA | pdata->capabilities;
 	mmc->caps2 |= pdata->capabilities2;
 	mmc->max_segs = 32;
diff --git a/include/linux/mmc/tmio.h b/include/linux/mmc/tmio.h
index 5f5cd80..b2f28e9 100644
--- a/include/linux/mmc/tmio.h
+++ b/include/linux/mmc/tmio.h
@@ -63,6 +63,8 @@
 #define TMIO_STAT_CMD_BUSY      0x40000000
 #define TMIO_STAT_ILL_ACCESS    0x80000000
 
+#define TMIO_STATUS2_DAT0	BIT(7)
+
 #define	CLK_CTL_DIV_MASK	0xff
 #define	CLK_CTL_SCLKEN		BIT(8)
 
-- 
2.7.4

[cip-dev] [PATCH 4.4.y-cip 13/83] mmc: sh_mobile_sdhi: Add UHS-I mode support

[Biju Das]

From: Wolfram Sang <wsa+renesas@sang-engineering.com>

commit 057a4592e6dbad0e571628968f3e20a3706e4701 upstream.

Implement voltage switch, supporting modes up to SDR-50.

Based on work by Shinobu Uehara, Rob Taylor, William Towle and Ian Molton.

Signed-off-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Biju Das <biju.das@bp.renesas.com>
---
 Documentation/devicetree/bindings/mmc/tmio_mmc.txt |  3 ++
 drivers/mmc/host/sh_mobile_sdhi.c                  | 52 ++++++++++++++++++++++
 2 files changed, 55 insertions(+)

diff --git a/Documentation/devicetree/bindings/mmc/tmio_mmc.txt b/Documentation/devicetree/bindings/mmc/tmio_mmc.txt
index cbf9135..1d23a43 100644
--- a/Documentation/devicetree/bindings/mmc/tmio_mmc.txt
+++ b/Documentation/devicetree/bindings/mmc/tmio_mmc.txt
@@ -27,3 +27,6 @@ Required properties:
 
 Optional properties:
 - toshiba,mmc-wrprotect-disable: write-protect detection is unavailable
+- pinctrl-names: should be "default", "state_uhs"
+- pinctrl-0: should contain default/high speed pin ctrl
+- pinctrl-1: should contain uhs mode pin ctrl
diff --git a/drivers/mmc/host/sh_mobile_sdhi.c b/drivers/mmc/host/sh_mobile_sdhi.c
index 51e49eb..d6035b4 100644
--- a/drivers/mmc/host/sh_mobile_sdhi.c
+++ b/drivers/mmc/host/sh_mobile_sdhi.c
@@ -32,6 +32,9 @@
 #include <linux/mfd/tmio.h>
 #include <linux/sh_dma.h>
 #include <linux/delay.h>
+#include <linux/pinctrl/consumer.h>
+#include <linux/pinctrl/pinctrl-state.h>
+#include <linux/regulator/consumer.h>
 
 #include "tmio_mmc.h"
 
@@ -98,6 +101,8 @@ struct sh_mobile_sdhi {
 	struct clk *clk;
 	struct tmio_mmc_data mmc_data;
 	struct tmio_mmc_dma dma_priv;
+	struct pinctrl *pinctrl;
+	struct pinctrl_state *pins_default, *pins_uhs;
 };
 
 static void sh_mobile_sdhi_sdbuf_width(struct tmio_mmc_host *host, int width)
@@ -206,6 +211,44 @@ static void sh_mobile_sdhi_clk_disable(struct tmio_mmc_host *host)
 	clk_disable_unprepare(priv->clk);
 }
 
+static int sh_mobile_sdhi_start_signal_voltage_switch(struct mmc_host *mmc,
+						      struct mmc_ios *ios)
+{
+	struct tmio_mmc_host *host = mmc_priv(mmc);
+	struct sh_mobile_sdhi *priv = host_to_priv(host);
+	struct pinctrl_state *pin_state;
+	int ret;
+
+	switch (ios->signal_voltage) {
+	case MMC_SIGNAL_VOLTAGE_330:
+		pin_state = priv->pins_default;
+		break;
+	case MMC_SIGNAL_VOLTAGE_180:
+		pin_state = priv->pins_uhs;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	/*
+	 * If anything is missing, assume signal voltage is fixed at
+	 * 3.3V and succeed/fail accordingly.
+	 */
+	if (IS_ERR(priv->pinctrl) || IS_ERR(pin_state))
+		return ios->signal_voltage ==
+			MMC_SIGNAL_VOLTAGE_330 ? 0 : -EINVAL;
+
+	ret = mmc_regulator_set_vqmmc(host->mmc, ios);
+	if (ret)
+		return ret;
+
+	ret = pinctrl_select_state(priv->pinctrl, pin_state);
+	if (ret)
+		return ret;
+
+	return 0;
+}
+
 static int sh_mobile_sdhi_wait_idle(struct tmio_mmc_host *host)
 {
 	int timeout = 1000;
@@ -296,6 +339,14 @@ static int sh_mobile_sdhi_probe(struct platform_device *pdev)
 		goto eprobe;
 	}
 
+	priv->pinctrl = devm_pinctrl_get(&pdev->dev);
+	if (!IS_ERR(priv->pinctrl)) {
+		priv->pins_default = pinctrl_lookup_state(priv->pinctrl,
+						PINCTRL_STATE_DEFAULT);
+		priv->pins_uhs = pinctrl_lookup_state(priv->pinctrl,
+						"state_uhs");
+	}
+
 	host = tmio_mmc_host_alloc(pdev);
 	if (!host) {
 		ret = -ENOMEM;
@@ -319,6 +370,7 @@ static int sh_mobile_sdhi_probe(struct platform_device *pdev)
 	host->clk_update	= sh_mobile_sdhi_clk_update;
 	host->clk_disable	= sh_mobile_sdhi_clk_disable;
 	host->multi_io_quirk	= sh_mobile_sdhi_multi_io_quirk;
+	host->start_signal_voltage_switch = sh_mobile_sdhi_start_signal_voltage_switch;
 
 	/* Orginally registers were 16 bit apart, could be 32 or 64 nowadays */
 	if (!host->bus_shift && resource_size(res) > 0x100) /* old way to determine the shift */
-- 
2.7.4

[cip-dev] [PATCH 4.4.y-cip 14/83] mmc: tmio: always start clock after frequency calculation

[Biju Das]

From: Wolfram Sang <wsa+renesas@sang-engineering.com>

commit 7fbc030da800d07193da4a4355ca2e197cf00cfb upstream.

Starting the clock is always done after frequency change anyhow, so we can
do it directly after the clock calculation and remove the specific calls.
This is the first part of doing proper clock de-/activation at calculation
time.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Biju Das <biju.das@bp.renesas.com>
---
 drivers/mmc/host/tmio_mmc_pio.c | 34 ++++++++++++++++------------------
 1 file changed, 16 insertions(+), 18 deletions(-)

diff --git a/drivers/mmc/host/tmio_mmc_pio.c b/drivers/mmc/host/tmio_mmc_pio.c
index 1935706..99139b8 100644
--- a/drivers/mmc/host/tmio_mmc_pio.c
+++ b/drivers/mmc/host/tmio_mmc_pio.c
@@ -154,6 +154,18 @@ static void tmio_mmc_enable_sdio_irq(struct mmc_host *mmc, int enable)
 	}
 }
 
+static void tmio_mmc_clk_start(struct tmio_mmc_host *host)
+{
+	sd_ctrl_write16(host, CTL_SD_CARD_CLK_CTL, CLK_CTL_SCLKEN |
+		sd_ctrl_read16(host, CTL_SD_CARD_CLK_CTL));
+	msleep(host->pdata->flags & TMIO_MMC_FAST_CLK_CHG ? 1 : 10);
+
+	if (host->pdata->flags & TMIO_MMC_HAVE_HIGH_REG) {
+		sd_ctrl_write16(host, CTL_CLK_AND_WAIT_CTL, 0x0100);
+		msleep(10);
+	}
+}
+
 static void tmio_mmc_set_clock(struct tmio_mmc_host *host,
 				unsigned int new_clock)
 {
@@ -182,6 +194,8 @@ static void tmio_mmc_set_clock(struct tmio_mmc_host *host,
 	sd_ctrl_write16(host, CTL_SD_CARD_CLK_CTL, clk & CLK_CTL_DIV_MASK);
 	if (!(host->pdata->flags & TMIO_MMC_FAST_CLK_CHG))
 		msleep(10);
+
+	tmio_mmc_clk_start(host);
 }
 
 static void tmio_mmc_clk_stop(struct tmio_mmc_host *host)
@@ -196,18 +210,6 @@ static void tmio_mmc_clk_stop(struct tmio_mmc_host *host)
 	msleep(host->pdata->flags & TMIO_MMC_FAST_CLK_CHG ? 5 : 10);
 }
 
-static void tmio_mmc_clk_start(struct tmio_mmc_host *host)
-{
-	sd_ctrl_write16(host, CTL_SD_CARD_CLK_CTL, CLK_CTL_SCLKEN |
-		sd_ctrl_read16(host, CTL_SD_CARD_CLK_CTL));
-	msleep(host->pdata->flags & TMIO_MMC_FAST_CLK_CHG ? 1 : 10);
-
-	if (host->pdata->flags & TMIO_MMC_HAVE_HIGH_REG) {
-		sd_ctrl_write16(host, CTL_CLK_AND_WAIT_CTL, 0x0100);
-		msleep(10);
-	}
-}
-
 static void tmio_mmc_reset(struct tmio_mmc_host *host)
 {
 	/* FIXME - should we set stop clock reg here */
@@ -953,14 +955,12 @@ static void tmio_mmc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
 		tmio_mmc_clk_stop(host);
 		break;
 	case MMC_POWER_UP:
-		tmio_mmc_set_clock(host, ios->clock);
 		tmio_mmc_power_on(host, ios->vdd);
-		tmio_mmc_clk_start(host);
+		tmio_mmc_set_clock(host, ios->clock);
 		tmio_mmc_set_bus_width(host, ios->bus_width);
 		break;
 	case MMC_POWER_ON:
 		tmio_mmc_set_clock(host, ios->clock);
-		tmio_mmc_clk_start(host);
 		tmio_mmc_set_bus_width(host, ios->bus_width);
 		break;
 	}
@@ -1269,10 +1269,8 @@ int tmio_mmc_host_runtime_resume(struct device *dev)
 	tmio_mmc_reset(host);
 	tmio_mmc_clk_enable(host);
 
-	if (host->clk_cache) {
+	if (host->clk_cache)
 		tmio_mmc_set_clock(host, host->clk_cache);
-		tmio_mmc_clk_start(host);
-	}
 
 	tmio_mmc_enable_dma(host, true);
 
-- 
2.7.4

[cip-dev] [PATCH 4.4.y-cip 15/83] mmc: tmio: stop clock when 0Hz is requested

[Biju Das]

From: Wolfram Sang <wsa+renesas@sang-engineering.com>

commit 148634d24d4a7dc82a49efcf1a215e1d0695f62c upstream.

Setting frequency to 0 is not enough, the clock explicitly has to be
disabled. Otherwise voltage switching (which needs SDCLK to be quiet)
fails for various cards.

Because we now do the 'new_clock == 0' check right at the beginning,
the indentation level of the rest of the code can be decreased a little.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Biju Das <biju.das@bp.renesas.com>
---
 drivers/mmc/host/tmio_mmc_pio.c | 50 +++++++++++++++++++++--------------------
 1 file changed, 26 insertions(+), 24 deletions(-)

diff --git a/drivers/mmc/host/tmio_mmc_pio.c b/drivers/mmc/host/tmio_mmc_pio.c
index 99139b8..6c09b1d 100644
--- a/drivers/mmc/host/tmio_mmc_pio.c
+++ b/drivers/mmc/host/tmio_mmc_pio.c
@@ -166,25 +166,39 @@ static void tmio_mmc_clk_start(struct tmio_mmc_host *host)
 	}
 }
 
+static void tmio_mmc_clk_stop(struct tmio_mmc_host *host)
+{
+	if (host->pdata->flags & TMIO_MMC_HAVE_HIGH_REG) {
+		sd_ctrl_write16(host, CTL_CLK_AND_WAIT_CTL, 0x0000);
+		msleep(10);
+	}
+
+	sd_ctrl_write16(host, CTL_SD_CARD_CLK_CTL, ~CLK_CTL_SCLKEN &
+		sd_ctrl_read16(host, CTL_SD_CARD_CLK_CTL));
+	msleep(host->pdata->flags & TMIO_MMC_FAST_CLK_CHG ? 5 : 10);
+}
+
 static void tmio_mmc_set_clock(struct tmio_mmc_host *host,
 				unsigned int new_clock)
 {
 	u32 clk = 0, clock;
 
-	if (new_clock) {
-		if (host->clk_update)
-			clock = host->clk_update(host, new_clock) / 512;
-		else
-			clock = host->mmc->f_min;
+	if (new_clock == 0) {
+		tmio_mmc_clk_stop(host);
+		return;
+	}
 
-		for (clk = 0x80000080; new_clock >= (clock << 1); clk >>= 1)
-			clock <<= 1;
+	if (host->clk_update)
+		clock = host->clk_update(host, new_clock) / 512;
+	else
+		clock = host->mmc->f_min;
 
-		/* 1/1 clock is option */
-		if ((host->pdata->flags & TMIO_MMC_CLK_ACTUAL) &&
-		   ((clk >> 22) & 0x1))
-			clk |= 0xff;
-	}
+	for (clk = 0x80000080; new_clock >= (clock << 1); clk >>= 1)
+		clock <<= 1;
+
+	/* 1/1 clock is option */
+	if ((host->pdata->flags & TMIO_MMC_CLK_ACTUAL) && ((clk >> 22) & 0x1))
+		clk |= 0xff;
 
 	if (host->set_clk_div)
 		host->set_clk_div(host->pdev, (clk >> 22) & 1);
@@ -198,18 +212,6 @@ static void tmio_mmc_set_clock(struct tmio_mmc_host *host,
 	tmio_mmc_clk_start(host);
 }
 
-static void tmio_mmc_clk_stop(struct tmio_mmc_host *host)
-{
-	if (host->pdata->flags & TMIO_MMC_HAVE_HIGH_REG) {
-		sd_ctrl_write16(host, CTL_CLK_AND_WAIT_CTL, 0x0000);
-		msleep(10);
-	}
-
-	sd_ctrl_write16(host, CTL_SD_CARD_CLK_CTL, ~CLK_CTL_SCLKEN &
-		sd_ctrl_read16(host, CTL_SD_CARD_CLK_CTL));
-	msleep(host->pdata->flags & TMIO_MMC_FAST_CLK_CHG ? 5 : 10);
-}
-
 static void tmio_mmc_reset(struct tmio_mmc_host *host)
 {
 	/* FIXME - should we set stop clock reg here */
-- 
2.7.4

[cip-dev] [PATCH 4.4.y-cip 16/83] mmc: tmio: Remove redundant runtime PM calls

[Biju Das]

From: Ulf Hansson <ulf.hansson@linaro.org>

commit 6aef2eecc4d4c9edb8c8d3e3a7f6af3cee42b2ec upstream.

Commit 9250aea76bfc ("mmc: core: Enable runtime PM management of host
devices"), made some calls to the runtime PM API from the driver
redundant. Especially those which deals with runtime PM reference
counting, so let's remove them.

Cc: Ian Molton <ian@mnementh.co.uk>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Biju Das <biju.das@bp.renesas.com>
---
 drivers/mmc/host/tmio_mmc_pio.c | 19 -------------------
 1 file changed, 19 deletions(-)

diff --git a/drivers/mmc/host/tmio_mmc_pio.c b/drivers/mmc/host/tmio_mmc_pio.c
index 6c09b1d..ff861f6 100644
--- a/drivers/mmc/host/tmio_mmc_pio.c
+++ b/drivers/mmc/host/tmio_mmc_pio.c
@@ -271,9 +271,6 @@ static void tmio_mmc_reset_work(struct work_struct *work)
 
 	tmio_mmc_abort_dma(host);
 	mmc_request_done(host->mmc, mrq);
-
-	pm_runtime_mark_last_busy(mmc_dev(host->mmc));
-	pm_runtime_put_autosuspend(mmc_dev(host->mmc));
 }
 
 /* called with host->lock held, interrupts disabled */
@@ -303,9 +300,6 @@ static void tmio_mmc_finish_request(struct tmio_mmc_host *host)
 		tmio_mmc_abort_dma(host);
 
 	mmc_request_done(host->mmc, mrq);
-
-	pm_runtime_mark_last_busy(mmc_dev(host->mmc));
-	pm_runtime_put_autosuspend(mmc_dev(host->mmc));
 }
 
 static void tmio_mmc_done_work(struct work_struct *work)
@@ -817,8 +811,6 @@ static void tmio_mmc_request(struct mmc_host *mmc, struct mmc_request *mrq)
 
 	spin_unlock_irqrestore(&host->lock, flags);
 
-	pm_runtime_get_sync(mmc_dev(mmc));
-
 	if (mrq->data) {
 		ret = tmio_mmc_start_data(host, mrq->data);
 		if (ret)
@@ -837,9 +829,6 @@ fail:
 	host->mrq = NULL;
 	mrq->cmd->error = ret;
 	mmc_request_done(mmc, mrq);
-
-	pm_runtime_mark_last_busy(mmc_dev(mmc));
-	pm_runtime_put_autosuspend(mmc_dev(mmc));
 }
 
 static int tmio_mmc_clk_enable(struct tmio_mmc_host *host)
@@ -923,8 +912,6 @@ static void tmio_mmc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
 	struct device *dev = &host->pdev->dev;
 	unsigned long flags;
 
-	pm_runtime_get_sync(mmc_dev(mmc));
-
 	mutex_lock(&host->ios_lock);
 
 	spin_lock_irqsave(&host->lock, flags);
@@ -979,9 +966,6 @@ static void tmio_mmc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
 	host->clk_cache = ios->clock;
 
 	mutex_unlock(&host->ios_lock);
-
-	pm_runtime_mark_last_busy(mmc_dev(mmc));
-	pm_runtime_put_autosuspend(mmc_dev(mmc));
 }
 
 static int tmio_mmc_get_ro(struct mmc_host *mmc)
@@ -992,11 +976,8 @@ static int tmio_mmc_get_ro(struct mmc_host *mmc)
 	if (ret >= 0)
 		return ret;
 
-	pm_runtime_get_sync(mmc_dev(mmc));
 	ret = !((pdata->flags & TMIO_MMC_WRPROTECT_DISABLE) ||
 		(sd_ctrl_read32(host, CTL_STATUS) & TMIO_STAT_WRPROTECT));
-	pm_runtime_mark_last_busy(mmc_dev(mmc));
-	pm_runtime_put_autosuspend(mmc_dev(mmc));
 
 	return ret;
 }
-- 
2.7.4

[cip-dev] [PATCH 4.4.y-cip 17/83] mmc: sh_mobile_sdhi: remove obsolete irq_by_name registration

[Biju Das]

From: Wolfram Sang <wsa+renesas@sang-engineering.com>

commit adcbc949046366edb46e44f72ac9197c32675cfd upstream.

There is no user left in the kernel, so this code can be removed.
(Legacy, non-DT sh_mobile boards have been removed a while ago.) The

diff looks more complicated than it is: The if-block for multiplexed isr
is now the main code path, the rest is removed.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Biju Das <biju.das@bp.renesas.com>
---
 drivers/mmc/host/sh_mobile_sdhi.c | 57 ++++++---------------------------------
 1 file changed, 8 insertions(+), 49 deletions(-)

diff --git a/drivers/mmc/host/sh_mobile_sdhi.c b/drivers/mmc/host/sh_mobile_sdhi.c
index d6035b4..ea78c77 100644
--- a/drivers/mmc/host/sh_mobile_sdhi.c
+++ b/drivers/mmc/host/sh_mobile_sdhi.c
@@ -28,7 +28,6 @@
 #include <linux/of_device.h>
 #include <linux/platform_device.h>
 #include <linux/mmc/host.h>
-#include <linux/mmc/sh_mobile_sdhi.h>
 #include <linux/mfd/tmio.h>
 #include <linux/sh_dma.h>
 #include <linux/delay.h>
@@ -318,7 +317,6 @@ static int sh_mobile_sdhi_probe(struct platform_device *pdev)
 	struct tmio_mmc_host *host;
 	struct resource *res;
 	int irq, ret, i = 0;
-	bool multiplexed_isr = true;
 	struct tmio_mmc_dma *dma_priv;
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
@@ -410,62 +408,23 @@ static int sh_mobile_sdhi_probe(struct platform_device *pdev)
 	if (ret < 0)
 		goto efree;
 
-	/*
-	 * Allow one or more specific (named) ISRs or
-	 * one or more multiplexed (un-named) ISRs.
-	 */
-
-	irq = platform_get_irq_byname(pdev, SH_MOBILE_SDHI_IRQ_CARD_DETECT);
-	if (irq >= 0) {
-		multiplexed_isr = false;
-		ret = devm_request_irq(&pdev->dev, irq, tmio_mmc_card_detect_irq, 0,
+	while (1) {
+		irq = platform_get_irq(pdev, i);
+		if (irq < 0)
+			break;
+		i++;
+		ret = devm_request_irq(&pdev->dev, irq, tmio_mmc_irq, 0,
 				  dev_name(&pdev->dev), host);
 		if (ret)
 			goto eirq;
 	}
 
-	irq = platform_get_irq_byname(pdev, SH_MOBILE_SDHI_IRQ_SDIO);
-	if (irq >= 0) {
-		multiplexed_isr = false;
-		ret = devm_request_irq(&pdev->dev, irq, tmio_mmc_sdio_irq, 0,
-				  dev_name(&pdev->dev), host);
-		if (ret)
-			goto eirq;
-	}
-
-	irq = platform_get_irq_byname(pdev, SH_MOBILE_SDHI_IRQ_SDCARD);
-	if (irq >= 0) {
-		multiplexed_isr = false;
-		ret = devm_request_irq(&pdev->dev, irq, tmio_mmc_sdcard_irq, 0,
-				  dev_name(&pdev->dev), host);
-		if (ret)
-			goto eirq;
-	} else if (!multiplexed_isr) {
-		dev_err(&pdev->dev,
-			"Principal SD-card IRQ is missing among named interrupts\n");
+	/* There must be at least one IRQ source */
+	if (!i) {
 		ret = irq;
 		goto eirq;
 	}
 
-	if (multiplexed_isr) {
-		while (1) {
-			irq = platform_get_irq(pdev, i);
-			if (irq < 0)
-				break;
-			i++;
-			ret = devm_request_irq(&pdev->dev, irq, tmio_mmc_irq, 0,
-					  dev_name(&pdev->dev), host);
-			if (ret)
-				goto eirq;
-		}
-
-		/* There must be at least one IRQ source */
-		if (!i) {
-			ret = irq;
-			goto eirq;
-		}
-	}
-
 	dev_info(&pdev->dev, "%s base at 0x%08lx max clock rate %u MHz\n",
 		 mmc_hostname(host->mmc), (unsigned long)
 		 (platform_get_resource(pdev, IORESOURCE_MEM, 0)->start),
-- 
2.7.4

[cip-dev] [PATCH 4.4.y-cip 18/83] mmc: tmio: remove now unneeded seperate irq handlers

[Biju Das]

From: Wolfram Sang <wsa+renesas@sang-engineering.com>

commit 4da986703882b2987b5731e8b31b88eece8c2fbb upstream.

We removed installation of separate handlers previously, so we can also
remove the separate handlers.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Biju Das <biju.das@bp.renesas.com>
[ Backported to 4.4 kernel ]
---
 drivers/mmc/host/tmio_mmc.h     |  3 ---
 drivers/mmc/host/tmio_mmc_pio.c | 36 +++++++-----------------------------
 2 files changed, 7 insertions(+), 32 deletions(-)

diff --git a/drivers/mmc/host/tmio_mmc.h b/drivers/mmc/host/tmio_mmc.h
index b1819c7..032188b 100644
--- a/drivers/mmc/host/tmio_mmc.h
+++ b/drivers/mmc/host/tmio_mmc.h
@@ -115,9 +115,6 @@ void tmio_mmc_do_data_irq(struct tmio_mmc_host *host);
 void tmio_mmc_enable_mmc_irqs(struct tmio_mmc_host *host, u32 i);
 void tmio_mmc_disable_mmc_irqs(struct tmio_mmc_host *host, u32 i);
 irqreturn_t tmio_mmc_irq(int irq, void *devid);
-irqreturn_t tmio_mmc_sdcard_irq(int irq, void *devid);
-irqreturn_t tmio_mmc_card_detect_irq(int irq, void *devid);
-irqreturn_t tmio_mmc_sdio_irq(int irq, void *devid);
 
 static inline char *tmio_mmc_kmap_atomic(struct scatterlist *sg,
 					 unsigned long *flags)
diff --git a/drivers/mmc/host/tmio_mmc_pio.c b/drivers/mmc/host/tmio_mmc_pio.c
index ff861f6..1e050a4 100644
--- a/drivers/mmc/host/tmio_mmc_pio.c
+++ b/drivers/mmc/host/tmio_mmc_pio.c
@@ -658,18 +658,6 @@ static bool __tmio_mmc_card_detect_irq(struct tmio_mmc_host *host,
 	return false;
 }
 
-irqreturn_t tmio_mmc_card_detect_irq(int irq, void *devid)
-{
-	unsigned int ireg, status;
-	struct tmio_mmc_host *host = devid;
-
-	tmio_mmc_card_irq_status(host, &ireg, &status);
-	__tmio_mmc_card_detect_irq(host, ireg, status);
-
-	return IRQ_HANDLED;
-}
-EXPORT_SYMBOL(tmio_mmc_card_detect_irq);
-
 static bool __tmio_mmc_sdcard_irq(struct tmio_mmc_host *host,
 				 int ireg, int status)
 {
@@ -699,19 +687,7 @@ static bool __tmio_mmc_sdcard_irq(struct tmio_mmc_host *host,
 	return false;
 }
 
-irqreturn_t tmio_mmc_sdcard_irq(int irq, void *devid)
-{
-	unsigned int ireg, status;
-	struct tmio_mmc_host *host = devid;
-
-	tmio_mmc_card_irq_status(host, &ireg, &status);
-	__tmio_mmc_sdcard_irq(host, ireg, status);
-
-	return IRQ_HANDLED;
-}
-EXPORT_SYMBOL(tmio_mmc_sdcard_irq);
-
-irqreturn_t tmio_mmc_sdio_irq(int irq, void *devid)
+static bool tmio_mmc_sdio_irq(int irq, void *devid)
 {
 	struct tmio_mmc_host *host = devid;
 	struct mmc_host *mmc = host->mmc;
@@ -720,7 +696,7 @@ irqreturn_t tmio_mmc_sdio_irq(int irq, void *devid)
 	unsigned int sdio_status;
 
 	if (!(pdata->flags & TMIO_MMC_SDIO_IRQ))
-		return IRQ_NONE;
+		return false;
 
 	status = sd_ctrl_read16(host, CTL_SDIO_STATUS);
 	ireg = status & TMIO_SDIO_MASK_ALL & ~host->sdcard_irq_mask;
@@ -734,9 +710,8 @@ irqreturn_t tmio_mmc_sdio_irq(int irq, void *devid)
 	if (mmc->caps & MMC_CAP_SDIO_IRQ && ireg & TMIO_SDIO_STAT_IOIRQ)
 		mmc_signal_sdio_irq(mmc);
 
-	return IRQ_RETVAL(ireg);
+	return ireg;
 }
-EXPORT_SYMBOL(tmio_mmc_sdio_irq);
 
 irqreturn_t tmio_mmc_irq(int irq, void *devid)
 {
@@ -751,7 +726,10 @@ irqreturn_t tmio_mmc_irq(int irq, void *devid)
 	if (__tmio_mmc_sdcard_irq(host, ireg, status))
 		return IRQ_HANDLED;
 
-	return tmio_mmc_sdio_irq(irq, devid);
+	if (tmio_mmc_sdio_irq(irq, devid))
+		return IRQ_HANDLED;
+
+	return IRQ_NONE;
 }
 EXPORT_SYMBOL(tmio_mmc_irq);
 
-- 
2.7.4

[cip-dev] [PATCH 4.4.y-cip 19/83] mmc: tmio: simplify irq handler

[Biju Das]

From: Wolfram Sang <wsa+renesas@sang-engineering.com>

commit 958401266e5812619b04765bef23712a72badd55 upstream.

Having just one irq handler again, let's include the 'card_status'
function in the main handler which is way more readable. Drop a useless
debug output while here. It should be a dev_dbg in case we ever need it
again.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Biju Das <biju.das@bp.renesas.com>
---
 drivers/mmc/host/tmio_mmc_pio.c | 23 ++++++++---------------
 1 file changed, 8 insertions(+), 15 deletions(-)

diff --git a/drivers/mmc/host/tmio_mmc_pio.c b/drivers/mmc/host/tmio_mmc_pio.c
index 1e050a4..f4f509c 100644
--- a/drivers/mmc/host/tmio_mmc_pio.c
+++ b/drivers/mmc/host/tmio_mmc_pio.c
@@ -626,19 +626,6 @@ out:
 	spin_unlock(&host->lock);
 }
 
-static void tmio_mmc_card_irq_status(struct tmio_mmc_host *host,
-				       int *ireg, int *status)
-{
-	*status = sd_ctrl_read32(host, CTL_STATUS);
-	*ireg = *status & TMIO_MASK_IRQ & ~host->sdcard_irq_mask;
-
-	pr_debug_status(*status);
-	pr_debug_status(*ireg);
-
-	/* Clear the status except the interrupt status */
-	sd_ctrl_write32(host, CTL_STATUS, TMIO_MASK_IRQ);
-}
-
 static bool __tmio_mmc_card_detect_irq(struct tmio_mmc_host *host,
 				      int ireg, int status)
 {
@@ -718,9 +705,15 @@ irqreturn_t tmio_mmc_irq(int irq, void *devid)
 	struct tmio_mmc_host *host = devid;
 	unsigned int ireg, status;
 
-	pr_debug("MMC IRQ begin\n");
+	status = sd_ctrl_read32(host, CTL_STATUS);
+	ireg = status & TMIO_MASK_IRQ & ~host->sdcard_irq_mask;
+
+	pr_debug_status(status);
+	pr_debug_status(ireg);
+
+	/* Clear the status except the interrupt status */
+	sd_ctrl_write32(host, CTL_STATUS, TMIO_MASK_IRQ);
 
-	tmio_mmc_card_irq_status(host, &ireg, &status);
 	if (__tmio_mmc_card_detect_irq(host, ireg, status))
 		return IRQ_HANDLED;
 	if (__tmio_mmc_sdcard_irq(host, ireg, status))
-- 
2.7.4

[cip-dev] [PATCH 4.4.y-cip 20/83] mmc: tmio: merge distributed include files

[Biju Das]

From: Wolfram Sang <wsa+renesas@sang-engineering.com>

commit ac86045ee9cd89774030ff1c21c7ff35f1c1eeaa upstream.

There is no reason to have a public and private header file. Merge them
into a private one, so looking up symbols is less confusing.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Biju Das <biju.das@bp.renesas.com>
---
 drivers/mmc/host/tmio_mmc.h     | 56 ++++++++++++++++++++++++++++++-
 drivers/mmc/host/tmio_mmc_dma.c |  1 -
 drivers/mmc/host/tmio_mmc_pio.c |  1 -
 include/linux/mmc/tmio.h        | 73 -----------------------------------------
 4 files changed, 55 insertions(+), 76 deletions(-)
 delete mode 100644 include/linux/mmc/tmio.h

diff --git a/drivers/mmc/host/tmio_mmc.h b/drivers/mmc/host/tmio_mmc.h
index 032188b..439fdad 100644
--- a/drivers/mmc/host/tmio_mmc.h
+++ b/drivers/mmc/host/tmio_mmc.h
@@ -1,6 +1,8 @@
 /*
  * linux/drivers/mmc/host/tmio_mmc.h
  *
+ * Copyright (C) 2016 Sang Engineering, Wolfram Sang
+ * Copyright (C) 2015-16 Renesas Electronics Corporation
  * Copyright (C) 2007 Ian Molton
  * Copyright (C) 2004 Ian Molton
  *
@@ -18,12 +20,64 @@
 
 #include <linux/dmaengine.h>
 #include <linux/highmem.h>
-#include <linux/mmc/tmio.h>
 #include <linux/mutex.h>
 #include <linux/pagemap.h>
 #include <linux/scatterlist.h>
 #include <linux/spinlock.h>
 
+#define CTL_SD_CMD 0x00
+#define CTL_ARG_REG 0x04
+#define CTL_STOP_INTERNAL_ACTION 0x08
+#define CTL_XFER_BLK_COUNT 0xa
+#define CTL_RESPONSE 0x0c
+#define CTL_STATUS 0x1c
+#define CTL_STATUS2 0x1e
+#define CTL_IRQ_MASK 0x20
+#define CTL_SD_CARD_CLK_CTL 0x24
+#define CTL_SD_XFER_LEN 0x26
+#define CTL_SD_MEM_CARD_OPT 0x28
+#define CTL_SD_ERROR_DETAIL_STATUS 0x2c
+#define CTL_SD_DATA_PORT 0x30
+#define CTL_TRANSACTION_CTL 0x34
+#define CTL_SDIO_STATUS 0x36
+#define CTL_SDIO_IRQ_MASK 0x38
+#define CTL_DMA_ENABLE 0xd8
+#define CTL_RESET_SD 0xe0
+#define CTL_VERSION 0xe2
+#define CTL_SDIO_REGS 0x100
+#define CTL_CLK_AND_WAIT_CTL 0x138
+#define CTL_RESET_SDIO 0x1e0
+
+/* Definitions for values the CTRL_STATUS register can take. */
+#define TMIO_STAT_CMDRESPEND    0x00000001
+#define TMIO_STAT_DATAEND       0x00000004
+#define TMIO_STAT_CARD_REMOVE   0x00000008
+#define TMIO_STAT_CARD_INSERT   0x00000010
+#define TMIO_STAT_SIGSTATE      0x00000020
+#define TMIO_STAT_WRPROTECT     0x00000080
+#define TMIO_STAT_CARD_REMOVE_A 0x00000100
+#define TMIO_STAT_CARD_INSERT_A 0x00000200
+#define TMIO_STAT_SIGSTATE_A    0x00000400
+#define TMIO_STAT_CMD_IDX_ERR   0x00010000
+#define TMIO_STAT_CRCFAIL       0x00020000
+#define TMIO_STAT_STOPBIT_ERR   0x00040000
+#define TMIO_STAT_DATATIMEOUT   0x00080000
+#define TMIO_STAT_RXOVERFLOW    0x00100000
+#define TMIO_STAT_TXUNDERRUN    0x00200000
+#define TMIO_STAT_CMDTIMEOUT    0x00400000
+#define TMIO_STAT_RXRDY         0x01000000
+#define TMIO_STAT_TXRQ          0x02000000
+#define TMIO_STAT_ILL_FUNC      0x20000000
+#define TMIO_STAT_CMD_BUSY      0x40000000
+#define TMIO_STAT_ILL_ACCESS    0x80000000
+
+#define TMIO_STATUS2_DAT0	BIT(7)
+
+#define	CLK_CTL_DIV_MASK	0xff
+#define	CLK_CTL_SCLKEN		BIT(8)
+
+#define TMIO_BBS		512		/* Boot block size */
+
 /* Definitions for values the CTRL_SDIO_STATUS register can take. */
 #define TMIO_SDIO_STAT_IOIRQ	0x0001
 #define TMIO_SDIO_STAT_EXPUB52	0x4000
diff --git a/drivers/mmc/host/tmio_mmc_dma.c b/drivers/mmc/host/tmio_mmc_dma.c
index 6754358..d157368 100644
--- a/drivers/mmc/host/tmio_mmc_dma.c
+++ b/drivers/mmc/host/tmio_mmc_dma.c
@@ -15,7 +15,6 @@
 #include <linux/dmaengine.h>
 #include <linux/mfd/tmio.h>
 #include <linux/mmc/host.h>
-#include <linux/mmc/tmio.h>
 #include <linux/pagemap.h>
 #include <linux/scatterlist.h>
 
diff --git a/drivers/mmc/host/tmio_mmc_pio.c b/drivers/mmc/host/tmio_mmc_pio.c
index f4f509c..78fd343 100644
--- a/drivers/mmc/host/tmio_mmc_pio.c
+++ b/drivers/mmc/host/tmio_mmc_pio.c
@@ -39,7 +39,6 @@
 #include <linux/mmc/host.h>
 #include <linux/mmc/mmc.h>
 #include <linux/mmc/slot-gpio.h>
-#include <linux/mmc/tmio.h>
 #include <linux/module.h>
 #include <linux/pagemap.h>
 #include <linux/platform_device.h>
diff --git a/include/linux/mmc/tmio.h b/include/linux/mmc/tmio.h
deleted file mode 100644
index b2f28e9..0000000
--- a/include/linux/mmc/tmio.h
+++ /dev/null
@@ -1,73 +0,0 @@
-/*
- * include/linux/mmc/tmio.h
- *
- * Copyright (C) 2016 Sang Engineering, Wolfram Sang
- * Copyright (C) 2015-16 Renesas Electronics Corporation
- * Copyright (C) 2007 Ian Molton
- * Copyright (C) 2004 Ian Molton
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * Driver for the MMC / SD / SDIO cell found in:
- *
- * TC6393XB TC6391XB TC6387XB T7L66XB ASIC3
- */
-#ifndef LINUX_MMC_TMIO_H
-#define LINUX_MMC_TMIO_H
-
-#define CTL_SD_CMD 0x00
-#define CTL_ARG_REG 0x04
-#define CTL_STOP_INTERNAL_ACTION 0x08
-#define CTL_XFER_BLK_COUNT 0xa
-#define CTL_RESPONSE 0x0c
-#define CTL_STATUS 0x1c
-#define CTL_STATUS2 0x1e
-#define CTL_IRQ_MASK 0x20
-#define CTL_SD_CARD_CLK_CTL 0x24
-#define CTL_SD_XFER_LEN 0x26
-#define CTL_SD_MEM_CARD_OPT 0x28
-#define CTL_SD_ERROR_DETAIL_STATUS 0x2c
-#define CTL_SD_DATA_PORT 0x30
-#define CTL_TRANSACTION_CTL 0x34
-#define CTL_SDIO_STATUS 0x36
-#define CTL_SDIO_IRQ_MASK 0x38
-#define CTL_DMA_ENABLE 0xd8
-#define CTL_RESET_SD 0xe0
-#define CTL_VERSION 0xe2
-#define CTL_SDIO_REGS 0x100
-#define CTL_CLK_AND_WAIT_CTL 0x138
-#define CTL_RESET_SDIO 0x1e0
-
-/* Definitions for values the CTRL_STATUS register can take. */
-#define TMIO_STAT_CMDRESPEND    0x00000001
-#define TMIO_STAT_DATAEND       0x00000004
-#define TMIO_STAT_CARD_REMOVE   0x00000008
-#define TMIO_STAT_CARD_INSERT   0x00000010
-#define TMIO_STAT_SIGSTATE      0x00000020
-#define TMIO_STAT_WRPROTECT     0x00000080
-#define TMIO_STAT_CARD_REMOVE_A 0x00000100
-#define TMIO_STAT_CARD_INSERT_A 0x00000200
-#define TMIO_STAT_SIGSTATE_A    0x00000400
-#define TMIO_STAT_CMD_IDX_ERR   0x00010000
-#define TMIO_STAT_CRCFAIL       0x00020000
-#define TMIO_STAT_STOPBIT_ERR   0x00040000
-#define TMIO_STAT_DATATIMEOUT   0x00080000
-#define TMIO_STAT_RXOVERFLOW    0x00100000
-#define TMIO_STAT_TXUNDERRUN    0x00200000
-#define TMIO_STAT_CMDTIMEOUT    0x00400000
-#define TMIO_STAT_RXRDY         0x01000000
-#define TMIO_STAT_TXRQ          0x02000000
-#define TMIO_STAT_ILL_FUNC      0x20000000
-#define TMIO_STAT_CMD_BUSY      0x40000000
-#define TMIO_STAT_ILL_ACCESS    0x80000000
-
-#define TMIO_STATUS2_DAT0	BIT(7)
-
-#define	CLK_CTL_DIV_MASK	0xff
-#define	CLK_CTL_SCLKEN		BIT(8)
-
-#define TMIO_BBS		512		/* Boot block size */
-
-#endif /* LINUX_MMC_TMIO_H */
-- 
2.7.4

[cip-dev] [PATCH 4.4.y-cip 21/83] mmc: tmio: give read32/write32 functions more descriptive names

[Biju Das]

From: Wolfram Sang <wsa+renesas@sang-engineering.com>

commit 2c54506b769d0633aac8f0511ef23f76bedeec9e upstream.

Looking at the backlogs, I am not the only one who missed that the above
functions do not read u32 from one register, but create a virtual u32
from reading to adjacent u16 registers (which depending on 'bus_shift'
can be up to 8 byte apart). Because this driver supports old hardware
for which we don't have documentation, I first wrongly assumed there was
a variant which had a few u32 registers. Let's give the functions more
descriptive names to make it more obvious what is happening.

Reviewed-by: Simon Horman <horms+renesas@verge.net.au>
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Biju Das <biju.das@bp.renesas.com>
---
 drivers/mmc/host/tmio_mmc.h     |  5 ++---
 drivers/mmc/host/tmio_mmc_pio.c | 22 +++++++++++-----------
 2 files changed, 13 insertions(+), 14 deletions(-)

diff --git a/drivers/mmc/host/tmio_mmc.h b/drivers/mmc/host/tmio_mmc.h
index 439fdad..e75e5ca 100644
--- a/drivers/mmc/host/tmio_mmc.h
+++ b/drivers/mmc/host/tmio_mmc.h
@@ -232,7 +232,7 @@ static inline void sd_ctrl_read16_rep(struct tmio_mmc_host *host, int addr,
 	readsw(host->ctl + (addr << host->bus_shift), buf, count);
 }
 
-static inline u32 sd_ctrl_read32(struct tmio_mmc_host *host, int addr)
+static inline u32 sd_ctrl_read16_and_16_as_32(struct tmio_mmc_host *host, int addr)
 {
 	return readw(host->ctl + (addr << host->bus_shift)) |
 	       readw(host->ctl + ((addr + 2) << host->bus_shift)) << 16;
@@ -254,11 +254,10 @@ static inline void sd_ctrl_write16_rep(struct tmio_mmc_host *host, int addr,
 	writesw(host->ctl + (addr << host->bus_shift), buf, count);
 }
 
-static inline void sd_ctrl_write32(struct tmio_mmc_host *host, int addr, u32 val)
+static inline void sd_ctrl_write32_as_16_and_16(struct tmio_mmc_host *host, int addr, u32 val)
 {
 	writew(val, host->ctl + (addr << host->bus_shift));
 	writew(val >> 16, host->ctl + ((addr + 2) << host->bus_shift));
 }
 
-
 #endif
diff --git a/drivers/mmc/host/tmio_mmc_pio.c b/drivers/mmc/host/tmio_mmc_pio.c
index 78fd343..fcc6879 100644
--- a/drivers/mmc/host/tmio_mmc_pio.c
+++ b/drivers/mmc/host/tmio_mmc_pio.c
@@ -55,18 +55,18 @@
 void tmio_mmc_enable_mmc_irqs(struct tmio_mmc_host *host, u32 i)
 {
 	host->sdcard_irq_mask &= ~(i & TMIO_MASK_IRQ);
-	sd_ctrl_write32(host, CTL_IRQ_MASK, host->sdcard_irq_mask);
+	sd_ctrl_write32_as_16_and_16(host, CTL_IRQ_MASK, host->sdcard_irq_mask);
 }
 
 void tmio_mmc_disable_mmc_irqs(struct tmio_mmc_host *host, u32 i)
 {
 	host->sdcard_irq_mask |= (i & TMIO_MASK_IRQ);
-	sd_ctrl_write32(host, CTL_IRQ_MASK, host->sdcard_irq_mask);
+	sd_ctrl_write32_as_16_and_16(host, CTL_IRQ_MASK, host->sdcard_irq_mask);
 }
 
 static void tmio_mmc_ack_mmc_irqs(struct tmio_mmc_host *host, u32 i)
 {
-	sd_ctrl_write32(host, CTL_STATUS, ~i);
+	sd_ctrl_write32_as_16_and_16(host, CTL_STATUS, ~i);
 }
 
 static void tmio_mmc_init_sg(struct tmio_mmc_host *host, struct mmc_data *data)
@@ -375,7 +375,7 @@ static int tmio_mmc_start_command(struct tmio_mmc_host *host, struct mmc_command
 	tmio_mmc_enable_mmc_irqs(host, irq_mask);
 
 	/* Fire off the command */
-	sd_ctrl_write32(host, CTL_ARG_REG, cmd->arg);
+	sd_ctrl_write32_as_16_and_16(host, CTL_ARG_REG, cmd->arg);
 	sd_ctrl_write16(host, CTL_SD_CMD, c);
 
 	return 0;
@@ -530,7 +530,7 @@ static void tmio_mmc_data_irq(struct tmio_mmc_host *host)
 		goto out;
 
 	if (host->chan_tx && (data->flags & MMC_DATA_WRITE) && !host->force_pio) {
-		u32 status = sd_ctrl_read32(host, CTL_STATUS);
+		u32 status = sd_ctrl_read16_and_16_as_32(host, CTL_STATUS);
 		bool done = false;
 
 		/*
@@ -585,7 +585,7 @@ static void tmio_mmc_cmd_irq(struct tmio_mmc_host *host,
 	 */
 
 	for (i = 3, addr = CTL_RESPONSE ; i >= 0 ; i--, addr += 4)
-		cmd->resp[i] = sd_ctrl_read32(host, addr);
+		cmd->resp[i] = sd_ctrl_read16_and_16_as_32(host, addr);
 
 	if (cmd->flags &  MMC_RSP_136) {
 		cmd->resp[0] = (cmd->resp[0] << 8) | (cmd->resp[1] >> 24);
@@ -704,14 +704,14 @@ irqreturn_t tmio_mmc_irq(int irq, void *devid)
 	struct tmio_mmc_host *host = devid;
 	unsigned int ireg, status;
 
-	status = sd_ctrl_read32(host, CTL_STATUS);
+	status = sd_ctrl_read16_and_16_as_32(host, CTL_STATUS);
 	ireg = status & TMIO_MASK_IRQ & ~host->sdcard_irq_mask;
 
 	pr_debug_status(status);
 	pr_debug_status(ireg);
 
 	/* Clear the status except the interrupt status */
-	sd_ctrl_write32(host, CTL_STATUS, TMIO_MASK_IRQ);
+	sd_ctrl_write32_as_16_and_16(host, CTL_STATUS, TMIO_MASK_IRQ);
 
 	if (__tmio_mmc_card_detect_irq(host, ireg, status))
 		return IRQ_HANDLED;
@@ -947,7 +947,7 @@ static int tmio_mmc_get_ro(struct mmc_host *mmc)
 		return ret;
 
 	ret = !((pdata->flags & TMIO_MMC_WRPROTECT_DISABLE) ||
-		(sd_ctrl_read32(host, CTL_STATUS) & TMIO_STAT_WRPROTECT));
+		(sd_ctrl_read16_and_16_as_32(host, CTL_STATUS) & TMIO_STAT_WRPROTECT));
 
 	return ret;
 }
@@ -967,7 +967,7 @@ static int tmio_mmc_card_busy(struct mmc_host *mmc)
 {
 	struct tmio_mmc_host *host = mmc_priv(mmc);
 
-	return !(sd_ctrl_read32(host, CTL_STATUS2) & TMIO_STATUS2_DAT0);
+	return !(sd_ctrl_read16_and_16_as_32(host, CTL_STATUS2) & TMIO_STATUS2_DAT0);
 }
 
 static struct mmc_host_ops tmio_mmc_ops = {
@@ -1116,7 +1116,7 @@ int tmio_mmc_host_probe(struct tmio_mmc_host *_host,
 	tmio_mmc_clk_stop(_host);
 	tmio_mmc_reset(_host);
 
-	_host->sdcard_irq_mask = sd_ctrl_read32(_host, CTL_IRQ_MASK);
+	_host->sdcard_irq_mask = sd_ctrl_read16_and_16_as_32(_host, CTL_IRQ_MASK);
 	tmio_mmc_disable_mmc_irqs(_host, TMIO_MASK_ALL);
 
 	/* Unmask the IRQs we want to know about */
-- 
2.7.4

[cip-dev] [PATCH 4.4.y-cip 22/83] mmc: tmio: use BIT() within defines

[Biju Das]

From: Wolfram Sang <wsa+renesas@sang-engineering.com>

commit 2cafc5cb4fcbe648d0d16ec5039ee292d85d7bfa upstream.

BIT() makes it easier to match the bits to the datasheet. This is
especially important here, since some variants have different names in
their datasheets (like with Renesas R-Car).

Reviewed-by: Simon Horman <horms+renesas@verge.net.au>
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Biju Das <biju.das@bp.renesas.com>
---
 drivers/mmc/host/tmio_mmc.h | 44 +++++++++++++++++++++++---------------------
 1 file changed, 23 insertions(+), 21 deletions(-)

diff --git a/drivers/mmc/host/tmio_mmc.h b/drivers/mmc/host/tmio_mmc.h
index e75e5ca..74945c1a 100644
--- a/drivers/mmc/host/tmio_mmc.h
+++ b/drivers/mmc/host/tmio_mmc.h
@@ -49,27 +49,29 @@
 #define CTL_RESET_SDIO 0x1e0
 
 /* Definitions for values the CTRL_STATUS register can take. */
-#define TMIO_STAT_CMDRESPEND    0x00000001
-#define TMIO_STAT_DATAEND       0x00000004
-#define TMIO_STAT_CARD_REMOVE   0x00000008
-#define TMIO_STAT_CARD_INSERT   0x00000010
-#define TMIO_STAT_SIGSTATE      0x00000020
-#define TMIO_STAT_WRPROTECT     0x00000080
-#define TMIO_STAT_CARD_REMOVE_A 0x00000100
-#define TMIO_STAT_CARD_INSERT_A 0x00000200
-#define TMIO_STAT_SIGSTATE_A    0x00000400
-#define TMIO_STAT_CMD_IDX_ERR   0x00010000
-#define TMIO_STAT_CRCFAIL       0x00020000
-#define TMIO_STAT_STOPBIT_ERR   0x00040000
-#define TMIO_STAT_DATATIMEOUT   0x00080000
-#define TMIO_STAT_RXOVERFLOW    0x00100000
-#define TMIO_STAT_TXUNDERRUN    0x00200000
-#define TMIO_STAT_CMDTIMEOUT    0x00400000
-#define TMIO_STAT_RXRDY         0x01000000
-#define TMIO_STAT_TXRQ          0x02000000
-#define TMIO_STAT_ILL_FUNC      0x20000000
-#define TMIO_STAT_CMD_BUSY      0x40000000
-#define TMIO_STAT_ILL_ACCESS    0x80000000
+#define TMIO_STAT_CMDRESPEND    BIT(0)
+#define TMIO_STAT_DATAEND       BIT(2)
+#define TMIO_STAT_CARD_REMOVE   BIT(3)
+#define TMIO_STAT_CARD_INSERT   BIT(4)
+#define TMIO_STAT_SIGSTATE      BIT(5)
+#define TMIO_STAT_WRPROTECT     BIT(7)
+#define TMIO_STAT_CARD_REMOVE_A BIT(8)
+#define TMIO_STAT_CARD_INSERT_A BIT(9)
+#define TMIO_STAT_SIGSTATE_A    BIT(10)
+
+/* These belong technically to CTRL_STATUS2, but the driver merges them */
+#define TMIO_STAT_CMD_IDX_ERR   BIT(16)
+#define TMIO_STAT_CRCFAIL       BIT(17)
+#define TMIO_STAT_STOPBIT_ERR   BIT(18)
+#define TMIO_STAT_DATATIMEOUT   BIT(19)
+#define TMIO_STAT_RXOVERFLOW    BIT(20)
+#define TMIO_STAT_TXUNDERRUN    BIT(21)
+#define TMIO_STAT_CMDTIMEOUT    BIT(22)
+#define TMIO_STAT_RXRDY         BIT(24)
+#define TMIO_STAT_TXRQ          BIT(25)
+#define TMIO_STAT_ILL_FUNC      BIT(29)
+#define TMIO_STAT_CMD_BUSY      BIT(30)
+#define TMIO_STAT_ILL_ACCESS    BIT(31)
 
 #define TMIO_STATUS2_DAT0	BIT(7)
 
-- 
2.7.4

[cip-dev] [PATCH 4.4.y-cip 23/83] mmc: tmio: use CTL_STATUS consistently

[Biju Das]

From: Wolfram Sang <wsa+renesas@sang-engineering.com>

commit 83e95351d49f60d6cf37706bf94529116d03e648 upstream.

To prevent confusion, use the virtual u32 CTL_STATUS in card_busy() the
same way as in other parts of this driver.

Reviewed-by: Simon Horman <horms+renesas@verge.net.au>
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Biju Das <biju.das@bp.renesas.com>
---
 drivers/mmc/host/tmio_mmc.h     | 3 +--
 drivers/mmc/host/tmio_mmc_pio.c | 2 +-
 2 files changed, 2 insertions(+), 3 deletions(-)

diff --git a/drivers/mmc/host/tmio_mmc.h b/drivers/mmc/host/tmio_mmc.h
index 74945c1a..55f251f 100644
--- a/drivers/mmc/host/tmio_mmc.h
+++ b/drivers/mmc/host/tmio_mmc.h
@@ -67,14 +67,13 @@
 #define TMIO_STAT_RXOVERFLOW    BIT(20)
 #define TMIO_STAT_TXUNDERRUN    BIT(21)
 #define TMIO_STAT_CMDTIMEOUT    BIT(22)
+#define TMIO_STAT_DAT0		BIT(23)	/* only known on R-Car so far */
 #define TMIO_STAT_RXRDY         BIT(24)
 #define TMIO_STAT_TXRQ          BIT(25)
 #define TMIO_STAT_ILL_FUNC      BIT(29)
 #define TMIO_STAT_CMD_BUSY      BIT(30)
 #define TMIO_STAT_ILL_ACCESS    BIT(31)
 
-#define TMIO_STATUS2_DAT0	BIT(7)
-
 #define	CLK_CTL_DIV_MASK	0xff
 #define	CLK_CTL_SCLKEN		BIT(8)
 
diff --git a/drivers/mmc/host/tmio_mmc_pio.c b/drivers/mmc/host/tmio_mmc_pio.c
index fcc6879..3a9620f 100644
--- a/drivers/mmc/host/tmio_mmc_pio.c
+++ b/drivers/mmc/host/tmio_mmc_pio.c
@@ -967,7 +967,7 @@ static int tmio_mmc_card_busy(struct mmc_host *mmc)
 {
 	struct tmio_mmc_host *host = mmc_priv(mmc);
 
-	return !(sd_ctrl_read16_and_16_as_32(host, CTL_STATUS2) & TMIO_STATUS2_DAT0);
+	return !(sd_ctrl_read16_and_16_as_32(host, CTL_STATUS) & TMIO_STAT_DAT0);
 }
 
 static struct mmc_host_ops tmio_mmc_ops = {
-- 
2.7.4

[cip-dev] [PATCH 4.4.y-cip 24/83] mmc: tmio/sdhi: distinguish between SCLKDIVEN and ILL_FUNC

[Biju Das]

From: Wolfram Sang <wsa+renesas@sang-engineering.com>

commit a21553c9e0c236ae241d9f4333aafae24ae19dfc upstream.

This bit has a different meaning in SDHI and original TMIO. Document
that and use the proper naming.

Reviewed-by: Simon Horman <horms+renesas@verge.net.au>
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Biju Das <biju.das@bp.renesas.com>
---
 drivers/mmc/host/sh_mobile_sdhi.c | 3 ++-
 drivers/mmc/host/tmio_mmc.h       | 3 ++-
 drivers/mmc/host/tmio_mmc_pio.c   | 2 +-
 3 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/drivers/mmc/host/sh_mobile_sdhi.c b/drivers/mmc/host/sh_mobile_sdhi.c
index ea78c77..7bb2900 100644
--- a/drivers/mmc/host/sh_mobile_sdhi.c
+++ b/drivers/mmc/host/sh_mobile_sdhi.c
@@ -252,7 +252,8 @@ static int sh_mobile_sdhi_wait_idle(struct tmio_mmc_host *host)
 {
 	int timeout = 1000;
 
-	while (--timeout && !(sd_ctrl_read16(host, CTL_STATUS2) & (1 << 13)))
+	while (--timeout && !(sd_ctrl_read16_and_16_as_32(host, CTL_STATUS)
+			      & TMIO_STAT_SCLKDIVEN))
 		udelay(1);
 
 	if (!timeout) {
diff --git a/drivers/mmc/host/tmio_mmc.h b/drivers/mmc/host/tmio_mmc.h
index 55f251f..8dd5ea4 100644
--- a/drivers/mmc/host/tmio_mmc.h
+++ b/drivers/mmc/host/tmio_mmc.h
@@ -70,7 +70,8 @@
 #define TMIO_STAT_DAT0		BIT(23)	/* only known on R-Car so far */
 #define TMIO_STAT_RXRDY         BIT(24)
 #define TMIO_STAT_TXRQ          BIT(25)
-#define TMIO_STAT_ILL_FUNC      BIT(29)
+#define TMIO_STAT_ILL_FUNC      BIT(29) /* only when !TMIO_MMC_HAS_IDLE_WAIT */
+#define TMIO_STAT_SCLKDIVEN     BIT(29) /* only when TMIO_MMC_HAS_IDLE_WAIT */
 #define TMIO_STAT_CMD_BUSY      BIT(30)
 #define TMIO_STAT_ILL_ACCESS    BIT(31)
 
diff --git a/drivers/mmc/host/tmio_mmc_pio.c b/drivers/mmc/host/tmio_mmc_pio.c
index 3a9620f..dbad002 100644
--- a/drivers/mmc/host/tmio_mmc_pio.c
+++ b/drivers/mmc/host/tmio_mmc_pio.c
@@ -542,7 +542,7 @@ static void tmio_mmc_data_irq(struct tmio_mmc_host *host)
 		 * waiting for one more interrupt fixes the problem.
 		 */
 		if (host->pdata->flags & TMIO_MMC_HAS_IDLE_WAIT) {
-			if (status & TMIO_STAT_ILL_FUNC)
+			if (status & TMIO_STAT_SCLKDIVEN)
 				done = true;
 		} else {
 			if (!(status & TMIO_STAT_CMD_BUSY))
-- 
2.7.4

[cip-dev] [PATCH 4.4.y-cip 25/83] mmc: tmio: document CTL_STATUS handling

[Biju Das]

From: Wolfram Sang <wsa+renesas@sang-engineering.com>

commit 184adf202bca05ca34380cb53b349307aede7ef3 upstream.

Now that reading CTL_STATUS is consistent, we can remove CTL_STATUS2 and
document how this is handled internally.

Reviewed-by: Simon Horman <horms+renesas@verge.net.au>
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Biju Das <biju.das@bp.renesas.com>
---
 drivers/mmc/host/tmio_mmc.h | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/mmc/host/tmio_mmc.h b/drivers/mmc/host/tmio_mmc.h
index 8dd5ea4..1aac2ad 100644
--- a/drivers/mmc/host/tmio_mmc.h
+++ b/drivers/mmc/host/tmio_mmc.h
@@ -30,8 +30,9 @@
 #define CTL_STOP_INTERNAL_ACTION 0x08
 #define CTL_XFER_BLK_COUNT 0xa
 #define CTL_RESPONSE 0x0c
+/* driver merges STATUS and following STATUS2 */
 #define CTL_STATUS 0x1c
-#define CTL_STATUS2 0x1e
+/* driver merges IRQ_MASK and following IRQ_MASK2 */
 #define CTL_IRQ_MASK 0x20
 #define CTL_SD_CARD_CLK_CTL 0x24
 #define CTL_SD_XFER_LEN 0x26
-- 
2.7.4

[cip-dev] [PATCH 4.4.y-cip 26/83] mmc: tmio/sdhi: introduce flag for RCar 2+ specific features

[Biju Das]

From: Wolfram Sang <wsa+renesas@sang-engineering.com>

commit 3d376fb2ea907f0c1bbccf87125456439feb4ed4 upstream.

RCar Gen2 and later implementations of TMIO/SDHI have their own set of
features and additions. FAST_CLK_CHG is just one of them and I see a few
others being added soon. Some may work on older chipsets but this needs
to be tested case by case. Instead of adding a bunch of flags for each
feature, add a global RCar2+ one for now. We can still break out
features if the need arises.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Tested-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Biju Das <biju.das@bp.renesas.com>
---
 drivers/mmc/host/sh_mobile_sdhi.c | 4 ++--
 drivers/mmc/host/tmio_mmc_pio.c   | 6 +++---
 include/linux/mfd/tmio.h          | 4 ++--
 3 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/drivers/mmc/host/sh_mobile_sdhi.c b/drivers/mmc/host/sh_mobile_sdhi.c
index 7bb2900..f7317cf 100644
--- a/drivers/mmc/host/sh_mobile_sdhi.c
+++ b/drivers/mmc/host/sh_mobile_sdhi.c
@@ -64,7 +64,7 @@ static const struct sh_mobile_sdhi_of_data of_rcar_gen1_compatible = {
 
 static const struct sh_mobile_sdhi_of_data of_rcar_gen2_compatible = {
 	.tmio_flags	= TMIO_MMC_HAS_IDLE_WAIT | TMIO_MMC_WRPROTECT_DISABLE |
-			  TMIO_MMC_CLK_ACTUAL | TMIO_MMC_FAST_CLK_CHG,
+			  TMIO_MMC_CLK_ACTUAL | TMIO_MMC_MIN_RCAR2,
 	.capabilities	= MMC_CAP_SD_HIGHSPEED | MMC_CAP_SDIO_IRQ,
 	.dma_buswidth	= DMA_SLAVE_BUSWIDTH_4_BYTES,
 	.dma_rx_offset	= 0x2000,
@@ -72,7 +72,7 @@ static const struct sh_mobile_sdhi_of_data of_rcar_gen2_compatible = {
 
 static const struct sh_mobile_sdhi_of_data of_rcar_gen3_compatible = {
 	.tmio_flags	= TMIO_MMC_HAS_IDLE_WAIT | TMIO_MMC_WRPROTECT_DISABLE |
-			  TMIO_MMC_CLK_ACTUAL | TMIO_MMC_FAST_CLK_CHG,
+			  TMIO_MMC_CLK_ACTUAL | TMIO_MMC_MIN_RCAR2,
 	.capabilities	= MMC_CAP_SD_HIGHSPEED,
 	.bus_shift	= 2,
 };
diff --git a/drivers/mmc/host/tmio_mmc_pio.c b/drivers/mmc/host/tmio_mmc_pio.c
index dbad002..b14672d 100644
--- a/drivers/mmc/host/tmio_mmc_pio.c
+++ b/drivers/mmc/host/tmio_mmc_pio.c
@@ -157,7 +157,7 @@ static void tmio_mmc_clk_start(struct tmio_mmc_host *host)
 {
 	sd_ctrl_write16(host, CTL_SD_CARD_CLK_CTL, CLK_CTL_SCLKEN |
 		sd_ctrl_read16(host, CTL_SD_CARD_CLK_CTL));
-	msleep(host->pdata->flags & TMIO_MMC_FAST_CLK_CHG ? 1 : 10);
+	msleep(host->pdata->flags & TMIO_MMC_MIN_RCAR2 ? 1 : 10);
 
 	if (host->pdata->flags & TMIO_MMC_HAVE_HIGH_REG) {
 		sd_ctrl_write16(host, CTL_CLK_AND_WAIT_CTL, 0x0100);
@@ -174,7 +174,7 @@ static void tmio_mmc_clk_stop(struct tmio_mmc_host *host)
 
 	sd_ctrl_write16(host, CTL_SD_CARD_CLK_CTL, ~CLK_CTL_SCLKEN &
 		sd_ctrl_read16(host, CTL_SD_CARD_CLK_CTL));
-	msleep(host->pdata->flags & TMIO_MMC_FAST_CLK_CHG ? 5 : 10);
+	msleep(host->pdata->flags & TMIO_MMC_MIN_RCAR2 ? 5 : 10);
 }
 
 static void tmio_mmc_set_clock(struct tmio_mmc_host *host,
@@ -205,7 +205,7 @@ static void tmio_mmc_set_clock(struct tmio_mmc_host *host,
 	sd_ctrl_write16(host, CTL_SD_CARD_CLK_CTL, ~CLK_CTL_SCLKEN &
 			sd_ctrl_read16(host, CTL_SD_CARD_CLK_CTL));
 	sd_ctrl_write16(host, CTL_SD_CARD_CLK_CTL, clk & CLK_CTL_DIV_MASK);
-	if (!(host->pdata->flags & TMIO_MMC_FAST_CLK_CHG))
+	if (!(host->pdata->flags & TMIO_MMC_MIN_RCAR2))
 		msleep(10);
 
 	tmio_mmc_clk_start(host);
diff --git a/include/linux/mfd/tmio.h b/include/linux/mfd/tmio.h
index 05d58ee..7a26286 100644
--- a/include/linux/mfd/tmio.h
+++ b/include/linux/mfd/tmio.h
@@ -66,8 +66,8 @@
  */
 #define TMIO_MMC_SDIO_IRQ		(1 << 2)
 
-/* Some controllers don't need to wait 10ms for clock changes */
-#define TMIO_MMC_FAST_CLK_CHG		(1 << 3)
+/* Some features are only available or tested on RCar Gen2 or later */
+#define TMIO_MMC_MIN_RCAR2		(1 << 3)
 
 /*
  * Some controllers require waiting for the SD bus to become
-- 
2.7.4

[cip-dev] [PATCH 4.4.y-cip 27/83] mmc: sh_mobile_sdhi: make clk_update function more compact

[Biju Das]

From: Wolfram Sang <wsa+renesas@sang-engineering.com>

commit 3072ba8cd95bd0e7fbe9a3a1c9b61fb190257855 upstream.

Save a few lines, the codebase is large enough.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Tested-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Biju Das <biju.das@bp.renesas.com>
---
 drivers/mmc/host/sh_mobile_sdhi.c | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/drivers/mmc/host/sh_mobile_sdhi.c b/drivers/mmc/host/sh_mobile_sdhi.c
index f7317cf..efa4fca 100644
--- a/drivers/mmc/host/sh_mobile_sdhi.c
+++ b/drivers/mmc/host/sh_mobile_sdhi.c
@@ -169,12 +169,9 @@ static unsigned int sh_mobile_sdhi_clk_update(struct tmio_mmc_host *host,
 					      unsigned int new_clock)
 {
 	struct sh_mobile_sdhi *priv = host_to_priv(host);
-	unsigned int freq, best_freq, diff_min, diff;
+	unsigned int freq, diff, best_freq = 0, diff_min = ~0;
 	int i;
 
-	diff_min = ~0;
-	best_freq = 0;
-
 	/*
 	 * We want the bus clock to be as close as possible to, but no
 	 * greater than, new_clock.  As we can divide by 1 << i for
-- 
2.7.4

[cip-dev] [PATCH 4.4.y-cip 28/83] mmc: sh_mobile_sdhi: only change the clock on RCar Gen2+

[Biju Das]

From: Wolfram Sang <wsa+renesas@sang-engineering.com>

commit 8fc009986471729533fb1246c7ea9395635dac26 upstream.

We had a regression on r8a7740 where the SDHI clock was a generic
peripheral clock, so changing its rate was not desired. This should be
fixed in the clock driver. However, it also shows that the new clock
calculation should only be used on tested systems. Add a check for that.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Tested-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Biju Das <biju.das@bp.renesas.com>
---
 drivers/mmc/host/sh_mobile_sdhi.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/mmc/host/sh_mobile_sdhi.c b/drivers/mmc/host/sh_mobile_sdhi.c
index efa4fca..d5e4000 100644
--- a/drivers/mmc/host/sh_mobile_sdhi.c
+++ b/drivers/mmc/host/sh_mobile_sdhi.c
@@ -172,6 +172,10 @@ static unsigned int sh_mobile_sdhi_clk_update(struct tmio_mmc_host *host,
 	unsigned int freq, diff, best_freq = 0, diff_min = ~0;
 	int i;
 
+	/* tested only on RCar Gen2+ currently; may work for others */
+	if (!(host->pdata->flags & TMIO_MMC_MIN_RCAR2))
+		return clk_get_rate(priv->clk);
+
 	/*
 	 * We want the bus clock to be as close as possible to, but no
 	 * greater than, new_clock.  As we can divide by 1 << i for
-- 
2.7.4

[cip-dev] [PATCH 4.4.y-cip 29/83] mmc: sh_mobile_sdhi: check return value when changing clk

[Biju Das]

From: Wolfram Sang <wsa+renesas@sang-engineering.com>

commit f3f44d512cafef7e3d2cb140f642786dd6ec8818 upstream.

And return the old clock rate if something went wrong.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Tested-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Biju Das <biju.das@bp.renesas.com>
---
 drivers/mmc/host/sh_mobile_sdhi.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/mmc/host/sh_mobile_sdhi.c b/drivers/mmc/host/sh_mobile_sdhi.c
index d5e4000..814391b 100644
--- a/drivers/mmc/host/sh_mobile_sdhi.c
+++ b/drivers/mmc/host/sh_mobile_sdhi.c
@@ -170,7 +170,7 @@ static unsigned int sh_mobile_sdhi_clk_update(struct tmio_mmc_host *host,
 {
 	struct sh_mobile_sdhi *priv = host_to_priv(host);
 	unsigned int freq, diff, best_freq = 0, diff_min = ~0;
-	int i;
+	int i, ret;
 
 	/* tested only on RCar Gen2+ currently; may work for others */
 	if (!(host->pdata->flags & TMIO_MMC_MIN_RCAR2))
@@ -199,9 +199,9 @@ static unsigned int sh_mobile_sdhi_clk_update(struct tmio_mmc_host *host,
 		}
 	}
 
-	clk_set_rate(priv->clk, best_freq);
+	ret = clk_set_rate(priv->clk, best_freq);
 
-	return best_freq;
+	return ret == 0 ? best_freq : clk_get_rate(priv->clk);
 }
 
 static void sh_mobile_sdhi_clk_disable(struct tmio_mmc_host *host)
-- 
2.7.4

[cip-dev] [PATCH 4.4.y-cip 30/83] mmc: sh_mobile_sdhi: properly document R-Car versions

[Biju Das]

From: Wolfram Sang <wsa+renesas@sang-engineering.com>

commit a2a16c77a1a2c951b5930c3182e2737cb13e1a53 upstream.

Replace hardcoded values with meaningful names and document what we
know.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Simon Horman <horms+renesas@verge.net.au>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Biju Das <biju.das@bp.renesas.com>
---
 drivers/mmc/host/sh_mobile_sdhi.c | 14 ++++++++++----
 1 file changed, 10 insertions(+), 4 deletions(-)

diff --git a/drivers/mmc/host/sh_mobile_sdhi.c b/drivers/mmc/host/sh_mobile_sdhi.c
index 814391b..62b6605 100644
--- a/drivers/mmc/host/sh_mobile_sdhi.c
+++ b/drivers/mmc/host/sh_mobile_sdhi.c
@@ -39,6 +39,12 @@
 
 #define EXT_ACC           0xe4
 
+#define SDHI_VER_GEN2_SDR50	0x490c
+/* very old datasheets said 0x490c for SDR104, too. They are wrong! */
+#define SDHI_VER_GEN2_SDR104	0xcb0d
+#define SDHI_VER_GEN3_SD	0xcc10
+#define SDHI_VER_GEN3_SDMMC	0xcd10
+
 #define host_to_priv(host) container_of((host)->pdata, struct sh_mobile_sdhi, mmc_data)
 
 struct sh_mobile_sdhi_of_data {
@@ -113,14 +119,14 @@ static void sh_mobile_sdhi_sdbuf_width(struct tmio_mmc_host *host, int width)
 	 *	sh_mobile_sdhi_of_data :: dma_buswidth
 	 */
 	switch (sd_ctrl_read16(host, CTL_VERSION)) {
-	case 0x490C:
+	case SDHI_VER_GEN2_SDR50:
 		val = (width == 32) ? 0x0001 : 0x0000;
 		break;
-	case 0xCB0D:
+	case SDHI_VER_GEN2_SDR104:
 		val = (width == 32) ? 0x0000 : 0x0001;
 		break;
-	case 0xCC10: /* Gen3, SD only */
-	case 0xCD10: /* Gen3, SD + MMC */
+	case SDHI_VER_GEN3_SD:
+	case SDHI_VER_GEN3_SDMMC:
 		if (width == 64)
 			val = 0x0000;
 		else if (width == 32)
-- 
2.7.4

[cip-dev] [PATCH 4.4.y-cip 31/83] mmc: host: sh_mobile_sdhi: move card_busy from tmio to sdhi

[Biju Das]

From: Wolfram Sang <wsa+renesas@sang-engineering.com>

commit 6a4679f312357ac7c74c0e1b996efdd1d0a612fa upstream.

card_busy is only used/tested on SDHI for R-Car Gen2 and later.
Move it to the SDHI driver, so we can then activate it conditionally
depending on the SDHI type.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Tested-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Biju Das <biju.das@bp.renesas.com>
---
 drivers/mmc/host/sh_mobile_sdhi.c | 8 ++++++++
 drivers/mmc/host/tmio_mmc.h       | 1 +
 drivers/mmc/host/tmio_mmc_pio.c   | 9 +--------
 3 files changed, 10 insertions(+), 8 deletions(-)

diff --git a/drivers/mmc/host/sh_mobile_sdhi.c b/drivers/mmc/host/sh_mobile_sdhi.c
index 62b6605..343aa1a 100644
--- a/drivers/mmc/host/sh_mobile_sdhi.c
+++ b/drivers/mmc/host/sh_mobile_sdhi.c
@@ -217,6 +217,13 @@ static void sh_mobile_sdhi_clk_disable(struct tmio_mmc_host *host)
 	clk_disable_unprepare(priv->clk);
 }
 
+static int sh_mobile_sdhi_card_busy(struct mmc_host *mmc)
+{
+	struct tmio_mmc_host *host = mmc_priv(mmc);
+
+	return !(sd_ctrl_read16_and_16_as_32(host, CTL_STATUS) & TMIO_STAT_DAT0);
+}
+
 static int sh_mobile_sdhi_start_signal_voltage_switch(struct mmc_host *mmc,
 						      struct mmc_ios *ios)
 {
@@ -376,6 +383,7 @@ static int sh_mobile_sdhi_probe(struct platform_device *pdev)
 	host->clk_update	= sh_mobile_sdhi_clk_update;
 	host->clk_disable	= sh_mobile_sdhi_clk_disable;
 	host->multi_io_quirk	= sh_mobile_sdhi_multi_io_quirk;
+	host->card_busy	= sh_mobile_sdhi_card_busy;
 	host->start_signal_voltage_switch = sh_mobile_sdhi_start_signal_voltage_switch;
 
 	/* Orginally registers were 16 bit apart, could be 32 or 64 nowadays */
diff --git a/drivers/mmc/host/tmio_mmc.h b/drivers/mmc/host/tmio_mmc.h
index 1aac2ad..addbc71 100644
--- a/drivers/mmc/host/tmio_mmc.h
+++ b/drivers/mmc/host/tmio_mmc.h
@@ -158,6 +158,7 @@ struct tmio_mmc_host {
 	void (*clk_disable)(struct tmio_mmc_host *host);
 	int (*multi_io_quirk)(struct mmc_card *card,
 			      unsigned int direction, int blk_size);
+	int (*card_busy)(struct mmc_host *mmc);
 	int (*start_signal_voltage_switch)(struct mmc_host *mmc,
 					   struct mmc_ios *ios);
 };
diff --git a/drivers/mmc/host/tmio_mmc_pio.c b/drivers/mmc/host/tmio_mmc_pio.c
index b14672d..d499ed2 100644
--- a/drivers/mmc/host/tmio_mmc_pio.c
+++ b/drivers/mmc/host/tmio_mmc_pio.c
@@ -963,20 +963,12 @@ static int tmio_multi_io_quirk(struct mmc_card *card,
 	return blk_size;
 }
 
-static int tmio_mmc_card_busy(struct mmc_host *mmc)
-{
-	struct tmio_mmc_host *host = mmc_priv(mmc);
-
-	return !(sd_ctrl_read16_and_16_as_32(host, CTL_STATUS) & TMIO_STAT_DAT0);
-}
-
 static struct mmc_host_ops tmio_mmc_ops = {
 	.request	= tmio_mmc_request,
 	.set_ios	= tmio_mmc_set_ios,
 	.get_ro         = tmio_mmc_get_ro,
 	.get_cd		= mmc_gpio_get_cd,
 	.enable_sdio_irq = tmio_mmc_enable_sdio_irq,
-	.card_busy	= tmio_mmc_card_busy,
 	.multi_io_quirk	= tmio_multi_io_quirk,
 };
 
@@ -1075,6 +1067,7 @@ int tmio_mmc_host_probe(struct tmio_mmc_host *_host,
 		goto host_free;
 	}
 
+	tmio_mmc_ops.card_busy = _host->card_busy;
 	tmio_mmc_ops.start_signal_voltage_switch = _host->start_signal_voltage_switch;
 	mmc->ops = &tmio_mmc_ops;
 
-- 
2.7.4

[cip-dev] [PATCH 4.4.y-cip 32/83] mmc: host: sh_mobile_sdhi: don't populate unneeded functions

[Biju Das]

From: Wolfram Sang <wsa+renesas@sang-engineering.com>

commit ff026099d775c74548839f1d627eb0b2bec0b857 upstream.

Populating card_busy caused a side-effect on a chip variant we don't
have documentation for (r8a73a4). So, enable it and voltage switching
only on devices known to support those features.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Tested-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Fixes: 452e5eef6d31 ("mmc: tmio: Add UHS-I mode support")
Signed-off-by: Biju Das <biju.das@bp.renesas.com>
---
 drivers/mmc/host/sh_mobile_sdhi.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/drivers/mmc/host/sh_mobile_sdhi.c b/drivers/mmc/host/sh_mobile_sdhi.c
index 343aa1a..3d186cc 100644
--- a/drivers/mmc/host/sh_mobile_sdhi.c
+++ b/drivers/mmc/host/sh_mobile_sdhi.c
@@ -383,8 +383,14 @@ static int sh_mobile_sdhi_probe(struct platform_device *pdev)
 	host->clk_update	= sh_mobile_sdhi_clk_update;
 	host->clk_disable	= sh_mobile_sdhi_clk_disable;
 	host->multi_io_quirk	= sh_mobile_sdhi_multi_io_quirk;
-	host->card_busy	= sh_mobile_sdhi_card_busy;
-	host->start_signal_voltage_switch = sh_mobile_sdhi_start_signal_voltage_switch;
+
+	/* SDR speeds are only available on Gen2+ */
+	if (mmc_data->flags & TMIO_MMC_MIN_RCAR2) {
+		/* card_busy caused issues on r8a73a4 (pre-Gen2) CD-less SDHI */
+		host->card_busy	= sh_mobile_sdhi_card_busy;
+		host->start_signal_voltage_switch =
+			sh_mobile_sdhi_start_signal_voltage_switch;
+	}
 
 	/* Orginally registers were 16 bit apart, could be 32 or 64 nowadays */
 	if (!host->bus_shift && resource_size(res) > 0x100) /* old way to determine the shift */
-- 
2.7.4

[cip-dev] [PATCH 4.4.y-cip 33/83] mmc: tmio: add eMMC support

[Biju Das]

From: Wolfram Sang <wsa+renesas@sang-engineering.com>

commit 0bc0b6e86524526c92a9409faea79d53db8e7e6e upstream.

We need to add R1 without CRC support, refactor the bus width routine a
little and extend a quirk check. To support "non-removable;" we need a
workaround which will be hopefully removed when reworking PM soon.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Biju Das <biju.das@bp.renesas.com>
---
 drivers/mmc/host/tmio_mmc.h     |  3 +++
 drivers/mmc/host/tmio_mmc_pio.c | 38 ++++++++++++++++++++++++++------------
 2 files changed, 29 insertions(+), 12 deletions(-)

diff --git a/drivers/mmc/host/tmio_mmc.h b/drivers/mmc/host/tmio_mmc.h
index addbc71..eafd92d 100644
--- a/drivers/mmc/host/tmio_mmc.h
+++ b/drivers/mmc/host/tmio_mmc.h
@@ -79,6 +79,9 @@
 #define	CLK_CTL_DIV_MASK	0xff
 #define	CLK_CTL_SCLKEN		BIT(8)
 
+#define CARD_OPT_WIDTH8		BIT(13)
+#define CARD_OPT_WIDTH		BIT(15)
+
 #define TMIO_BBS		512		/* Boot block size */
 
 /* Definitions for values the CTRL_SDIO_STATUS register can take. */
diff --git a/drivers/mmc/host/tmio_mmc_pio.c b/drivers/mmc/host/tmio_mmc_pio.c
index d499ed2..c927916 100644
--- a/drivers/mmc/host/tmio_mmc_pio.c
+++ b/drivers/mmc/host/tmio_mmc_pio.c
@@ -336,7 +336,9 @@ static int tmio_mmc_start_command(struct tmio_mmc_host *host, struct mmc_command
 
 	switch (mmc_resp_type(cmd)) {
 	case MMC_RSP_NONE: c |= RESP_NONE; break;
-	case MMC_RSP_R1:   c |= RESP_R1;   break;
+	case MMC_RSP_R1:
+	case MMC_RSP_R1_NO_CRC:
+			   c |= RESP_R1;   break;
 	case MMC_RSP_R1B:  c |= RESP_R1B;  break;
 	case MMC_RSP_R2:   c |= RESP_R2;   break;
 	case MMC_RSP_R3:   c |= RESP_R3;   break;
@@ -733,12 +735,13 @@ static int tmio_mmc_start_data(struct tmio_mmc_host *host,
 	pr_debug("setup data transfer: blocksize %08x  nr_blocks %d\n",
 		 data->blksz, data->blocks);
 
-	/* Some hardware cannot perform 2 byte requests in 4 bit mode */
-	if (host->mmc->ios.bus_width == MMC_BUS_WIDTH_4) {
+	/* Some hardware cannot perform 2 byte requests in 4/8 bit mode */
+	if (host->mmc->ios.bus_width == MMC_BUS_WIDTH_4 ||
+	    host->mmc->ios.bus_width == MMC_BUS_WIDTH_8) {
 		int blksz_2bytes = pdata->flags & TMIO_MMC_BLKSZ_2BYTES;
 
 		if (data->blksz < 2 || (data->blksz < 4 && !blksz_2bytes)) {
-			pr_err("%s: %d byte block unsupported in 4 bit mode\n",
+			pr_err("%s: %d byte block unsupported in 4/8 bit mode\n",
 			       mmc_hostname(host->mmc), data->blksz);
 			return -EINVAL;
 		}
@@ -860,14 +863,16 @@ static void tmio_mmc_power_off(struct tmio_mmc_host *host)
 static void tmio_mmc_set_bus_width(struct tmio_mmc_host *host,
 				unsigned char bus_width)
 {
-	switch (bus_width) {
-	case MMC_BUS_WIDTH_1:
-		sd_ctrl_write16(host, CTL_SD_MEM_CARD_OPT, 0x80e0);
-		break;
-	case MMC_BUS_WIDTH_4:
-		sd_ctrl_write16(host, CTL_SD_MEM_CARD_OPT, 0x00e0);
-		break;
-	}
+	u16 reg = sd_ctrl_read16(host, CTL_SD_MEM_CARD_OPT)
+				& ~(CARD_OPT_WIDTH | CARD_OPT_WIDTH8);
+
+	/* reg now applies to MMC_BUS_WIDTH_4 */
+	if (bus_width == MMC_BUS_WIDTH_1)
+		reg |= CARD_OPT_WIDTH;
+	else if (bus_width == MMC_BUS_WIDTH_8)
+		reg |= CARD_OPT_WIDTH8;
+
+	sd_ctrl_write16(host, CTL_SD_MEM_CARD_OPT, reg);
 }
 
 /* Set MMC clock / power.
@@ -1085,6 +1090,15 @@ int tmio_mmc_host_probe(struct tmio_mmc_host *_host,
 				  mmc->caps & MMC_CAP_NONREMOVABLE ||
 				  mmc->slot.cd_irq >= 0);
 
+	/*
+	 * On Gen2+, eMMC with NONREMOVABLE currently fails because native
+	 * hotplug gets disabled. It seems RuntimePM related yet we need further
+	 * research. Since we are planning a PM overhaul anyway, let's enforce
+	 * for now the device being active by enabling native hotplug always.
+	 */
+	if (pdata->flags & TMIO_MMC_MIN_RCAR2)
+		_host->native_hotplug = true;
+
 	if (tmio_mmc_clk_enable(_host) < 0) {
 		mmc->f_max = pdata->hclk;
 		mmc->f_min = mmc->f_max / 512;
-- 
2.7.4

[cip-dev] [PATCH 4.4.y-cip 34/83] mmc: tmio-mmc: add support for 32bit data port

[Biju Das]

From: Chris Brandt <chris.brandt@renesas.com>

commit 8185e51f358a8dd4801b67e8c66f03eb9eeaba75 upstream.

For the r7s72100 SOC, the DATA_PORT register was changed to 32-bits wide.
Therefore a new flag has been created that will allow 32-bit reads/writes
to the DATA_PORT register instead of 16-bit (because 16-bits accesses are
not supported).

Signed-off-by: Chris Brandt <chris.brandt@renesas.com>
Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Biju Das <biju.das@bp.renesas.com>
---
 drivers/mmc/host/tmio_mmc.h     | 12 ++++++++++++
 drivers/mmc/host/tmio_mmc_pio.c | 30 ++++++++++++++++++++++++++++++
 include/linux/mfd/tmio.h        |  5 +++++
 3 files changed, 47 insertions(+)

diff --git a/drivers/mmc/host/tmio_mmc.h b/drivers/mmc/host/tmio_mmc.h
index eafd92d..c4131d9 100644
--- a/drivers/mmc/host/tmio_mmc.h
+++ b/drivers/mmc/host/tmio_mmc.h
@@ -245,6 +245,12 @@ static inline u32 sd_ctrl_read16_and_16_as_32(struct tmio_mmc_host *host, int ad
 	       readw(host->ctl + ((addr + 2) << host->bus_shift)) << 16;
 }
 
+static inline void sd_ctrl_read32_rep(struct tmio_mmc_host *host, int addr,
+		u32 *buf, int count)
+{
+	readsl(host->ctl + (addr << host->bus_shift), buf, count);
+}
+
 static inline void sd_ctrl_write16(struct tmio_mmc_host *host, int addr, u16 val)
 {
 	/* If there is a hook and it returns non-zero then there
@@ -267,4 +273,10 @@ static inline void sd_ctrl_write32_as_16_and_16(struct tmio_mmc_host *host, int
 	writew(val >> 16, host->ctl + ((addr + 2) << host->bus_shift));
 }
 
+static inline void sd_ctrl_write32_rep(struct tmio_mmc_host *host, int addr,
+		const u32 *buf, int count)
+{
+	writesl(host->ctl + (addr << host->bus_shift), buf, count);
+}
+
 #endif
diff --git a/drivers/mmc/host/tmio_mmc_pio.c b/drivers/mmc/host/tmio_mmc_pio.c
index c927916..4d9e17a 100644
--- a/drivers/mmc/host/tmio_mmc_pio.c
+++ b/drivers/mmc/host/tmio_mmc_pio.c
@@ -393,6 +393,36 @@ static void tmio_mmc_transfer_data(struct tmio_mmc_host *host,
 	/*
 	 * Transfer the data
 	 */
+	if (host->pdata->flags & TMIO_MMC_32BIT_DATA_PORT) {
+		u8 data[4] = { };
+
+		if (is_read)
+			sd_ctrl_read32_rep(host, CTL_SD_DATA_PORT, (u32 *)buf,
+					   count >> 2);
+		else
+			sd_ctrl_write32_rep(host, CTL_SD_DATA_PORT, (u32 *)buf,
+					    count >> 2);
+
+		/* if count was multiple of 4 */
+		if (!(count & 0x3))
+			return;
+
+		buf8 = (u8 *)(buf + (count >> 2));
+		count %= 4;
+
+		if (is_read) {
+			sd_ctrl_read32_rep(host, CTL_SD_DATA_PORT,
+					   (u32 *)data, 1);
+			memcpy(buf8, data, count);
+		} else {
+			memcpy(data, buf8, count);
+			sd_ctrl_write32_rep(host, CTL_SD_DATA_PORT,
+					    (u32 *)data, 1);
+		}
+
+		return;
+	}
+
 	if (is_read)
 		sd_ctrl_read16_rep(host, CTL_SD_DATA_PORT, buf, count >> 1);
 	else
diff --git a/include/linux/mfd/tmio.h b/include/linux/mfd/tmio.h
index 7a26286..fba44ab 100644
--- a/include/linux/mfd/tmio.h
+++ b/include/linux/mfd/tmio.h
@@ -100,6 +100,11 @@
 #define TMIO_MMC_SDIO_STATUS_QUIRK	(1 << 8)
 
 /*
+ * Some controllers have a 32-bit wide data port register
+ */
+#define TMIO_MMC_32BIT_DATA_PORT	(1 << 9)
+
+/*
  * Some controllers allows to set SDx actual clock
  */
 #define TMIO_MMC_CLK_ACTUAL		(1 << 10)
-- 
2.7.4

[cip-dev] [PATCH 4.4.y-cip 35/83] mmc: add define for R1 response without CRC

[Biju Das]

From: Wolfram Sang <wsa+renesas@sang-engineering.com>

commit 51b50c961676428cd356d6fa494a2e9f53dc77bf upstream.

The core uses it for polling. Give drivers a proper define handle this
case like for other response types.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Biju Das <biju.das@bp.renesas.com>
---
 include/linux/mmc/core.h | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/include/linux/mmc/core.h b/include/linux/mmc/core.h
index 37967b6..6c2e285 100644
--- a/include/linux/mmc/core.h
+++ b/include/linux/mmc/core.h
@@ -55,6 +55,9 @@ struct mmc_command {
 #define MMC_RSP_R6	(MMC_RSP_PRESENT|MMC_RSP_CRC|MMC_RSP_OPCODE)
 #define MMC_RSP_R7	(MMC_RSP_PRESENT|MMC_RSP_CRC|MMC_RSP_OPCODE)
 
+/* Can be used by core to poll after switch to MMC HS mode */
+#define MMC_RSP_R1_NO_CRC	(MMC_RSP_PRESENT|MMC_RSP_OPCODE)
+
 #define mmc_resp_type(cmd)	((cmd)->flags & (MMC_RSP_PRESENT|MMC_RSP_136|MMC_RSP_CRC|MMC_RSP_BUSY|MMC_RSP_OPCODE))
 
 /*
-- 
2.7.4

[cip-dev] [PATCH 4.4.y-cip 36/83] mmc: sh_mobile_sdhi: add ocr_mask option

[Biju Das]

From: Chris Brandt <chris.brandt@renesas.com>

commit f19417f38264f9a2f7b4627aa4060133c237b211 upstream.

In moving platforms from board files to DT, there still needs to be a way
to set the ocr_mask setting for the tmio driver during probe. Without this
setting, the probe will fail because the supported voltages are not known.

This patch will also traditional platform registration platforms to
migrate to DT.

Signed-off-by: Chris Brandt <chris.brandt@renesas.com>
Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Biju Das <biju.das@bp.renesas.com>
---
 drivers/mmc/host/sh_mobile_sdhi.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/mmc/host/sh_mobile_sdhi.c b/drivers/mmc/host/sh_mobile_sdhi.c
index 3d186cc..9124246 100644
--- a/drivers/mmc/host/sh_mobile_sdhi.c
+++ b/drivers/mmc/host/sh_mobile_sdhi.c
@@ -49,6 +49,7 @@
 
 struct sh_mobile_sdhi_of_data {
 	unsigned long tmio_flags;
+	u32	      tmio_ocr_mask;
 	unsigned long capabilities;
 	unsigned long capabilities2;
 	enum dma_slave_buswidth dma_buswidth;
@@ -370,6 +371,7 @@ static int sh_mobile_sdhi_probe(struct platform_device *pdev)
 		const struct sh_mobile_sdhi_of_data *of_data = of_id->data;
 
 		mmc_data->flags |= of_data->tmio_flags;
+		mmc_data->ocr_mask = of_data->tmio_ocr_mask;
 		mmc_data->capabilities |= of_data->capabilities;
 		mmc_data->capabilities2 |= of_data->capabilities2;
 		mmc_data->dma_rx_offset = of_data->dma_rx_offset;
-- 
2.7.4

[cip-dev] [PATCH 4.4.y-cip 37/83] mmc: tmio: enhance illegal sequence handling

[Biju Das]

From: Ai Kyuse <ai.kyuse.uw@renesas.com>

commit 96e0b2ba00ee5dacb12bed6585145ce784ec9153 upstream.

An illegal sequence command error may occur if there is a stopbit or
cmd_index error as well as a CRC error. The correct course of action
is to re-enable IRQs

An illegal sequence data error may occur if there is a CRC or stopbit
error,  or underrun. In this case set data->error correctly.

This is in preparation for enabling tuning support which relies on
differentiating between illegal sequence and other errors.

Signed-off-by: Ai Kyuse <ai.kyuse.uw@renesas.com>
[simon: broken out of a larger patch]
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
Acked-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Tested-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

Signed-off-by: Biju Das <biju.das@bp.renesas.com>
---
 drivers/mmc/host/tmio_mmc_pio.c | 15 +++++++++------
 1 file changed, 9 insertions(+), 6 deletions(-)

diff --git a/drivers/mmc/host/tmio_mmc_pio.c b/drivers/mmc/host/tmio_mmc_pio.c
index 4d9e17a..c255af8 100644
--- a/drivers/mmc/host/tmio_mmc_pio.c
+++ b/drivers/mmc/host/tmio_mmc_pio.c
@@ -552,7 +552,7 @@ void tmio_mmc_do_data_irq(struct tmio_mmc_host *host)
 	schedule_work(&host->done);
 }
 
-static void tmio_mmc_data_irq(struct tmio_mmc_host *host)
+static void tmio_mmc_data_irq(struct tmio_mmc_host *host, unsigned int stat)
 {
 	struct mmc_data *data;
 	spin_lock(&host->lock);
@@ -561,6 +561,9 @@ static void tmio_mmc_data_irq(struct tmio_mmc_host *host)
 	if (!data)
 		goto out;
 
+	if (stat & TMIO_STAT_CRCFAIL || stat & TMIO_STAT_STOPBIT_ERR ||
+	    stat & TMIO_STAT_TXUNDERRUN)
+		data->error = -EILSEQ;
 	if (host->chan_tx && (data->flags & MMC_DATA_WRITE) && !host->force_pio) {
 		u32 status = sd_ctrl_read16_and_16_as_32(host, CTL_STATUS);
 		bool done = false;
@@ -609,8 +612,6 @@ static void tmio_mmc_cmd_irq(struct tmio_mmc_host *host,
 		goto out;
 	}
 
-	host->cmd = NULL;
-
 	/* This controller is sicker than the PXA one. Not only do we need to
 	 * drop the top 8 bits of the first response word, we also need to
 	 * modify the order of the response for short response command types.
@@ -630,14 +631,16 @@ static void tmio_mmc_cmd_irq(struct tmio_mmc_host *host,
 
 	if (stat & TMIO_STAT_CMDTIMEOUT)
 		cmd->error = -ETIMEDOUT;
-	else if (stat & TMIO_STAT_CRCFAIL && cmd->flags & MMC_RSP_CRC)
+	else if ((stat & TMIO_STAT_CRCFAIL && cmd->flags & MMC_RSP_CRC) ||
+		 stat & TMIO_STAT_STOPBIT_ERR ||
+		 stat & TMIO_STAT_CMD_IDX_ERR)
 		cmd->error = -EILSEQ;
 
 	/* If there is data to handle we enable data IRQs here, and
 	 * we will ultimatley finish the request in the data_end handler.
 	 * If theres no data or we encountered an error, finish now.
 	 */
-	if (host->data && !cmd->error) {
+	if (host->data && (!cmd->error || cmd->error == -EILSEQ)) {
 		if (host->data->flags & MMC_DATA_READ) {
 			if (host->force_pio || !host->chan_rx)
 				tmio_mmc_enable_mmc_irqs(host, TMIO_MASK_READOP);
@@ -698,7 +701,7 @@ static bool __tmio_mmc_sdcard_irq(struct tmio_mmc_host *host,
 	/* Data transfer completion */
 	if (ireg & TMIO_STAT_DATAEND) {
 		tmio_mmc_ack_mmc_irqs(host, TMIO_STAT_DATAEND);
-		tmio_mmc_data_irq(host);
+		tmio_mmc_data_irq(host, status);
 		return true;
 	}
 
-- 
2.7.4

[cip-dev] [PATCH 4.4.y-cip 38/83] mmc: tmio: document mandatory and optional callbacks

[Biju Das]

From: Simon Horman <horms+renesas@verge.net.au>

commit 2f87365f832bbc26e32f23588aaeb40abe15ff0d upstream.

Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
Acked-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Tested-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Biju Das <biju.das@bp.renesas.com>
---
 drivers/mmc/host/tmio_mmc.h | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/mmc/host/tmio_mmc.h b/drivers/mmc/host/tmio_mmc.h
index c4131d9..d3d24e1 100644
--- a/drivers/mmc/host/tmio_mmc.h
+++ b/drivers/mmc/host/tmio_mmc.h
@@ -154,8 +154,10 @@ struct tmio_mmc_host {
 	bool			native_hotplug;
 	bool			sdio_irq_enabled;
 
-	int (*write16_hook)(struct tmio_mmc_host *host, int addr);
+	/* Mandatory callback */
 	int (*clk_enable)(struct tmio_mmc_host *host);
+
+	/* Optional callbacks */
 	unsigned int (*clk_update)(struct tmio_mmc_host *host,
 				   unsigned int new_clock);
 	void (*clk_disable)(struct tmio_mmc_host *host);
@@ -164,6 +166,7 @@ struct tmio_mmc_host {
 	int (*card_busy)(struct mmc_host *mmc);
 	int (*start_signal_voltage_switch)(struct mmc_host *mmc,
 					   struct mmc_ios *ios);
+	int (*write16_hook)(struct tmio_mmc_host *host, int addr);
 };
 
 struct tmio_mmc_host *tmio_mmc_host_alloc(struct platform_device *pdev);
-- 
2.7.4

[cip-dev] [PATCH 4.4.y-cip 39/83] mmc: tmio: Add hw reset support

[Biju Das]

From: Ai Kyuse <ai.kyuse.uw@renesas.com>

commit e8f36b5d3b54a49df02c950050659a5082e2c880 upstream.

Add hw reset support.

Signed-off-by: Ai Kyuse <ai.kyuse.uw@renesas.com>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
Acked-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Tested-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Biju Das <biju.das@bp.renesas.com>
---
 drivers/mmc/host/tmio_mmc.h     | 1 +
 drivers/mmc/host/tmio_mmc_pio.c | 9 +++++++++
 2 files changed, 10 insertions(+)

diff --git a/drivers/mmc/host/tmio_mmc.h b/drivers/mmc/host/tmio_mmc.h
index d3d24e1..8b4869e 100644
--- a/drivers/mmc/host/tmio_mmc.h
+++ b/drivers/mmc/host/tmio_mmc.h
@@ -167,6 +167,7 @@ struct tmio_mmc_host {
 	int (*start_signal_voltage_switch)(struct mmc_host *mmc,
 					   struct mmc_ios *ios);
 	int (*write16_hook)(struct tmio_mmc_host *host, int addr);
+	void (*hw_reset)(struct tmio_mmc_host *host);
 };
 
 struct tmio_mmc_host *tmio_mmc_host_alloc(struct platform_device *pdev);
diff --git a/drivers/mmc/host/tmio_mmc_pio.c b/drivers/mmc/host/tmio_mmc_pio.c
index c255af8..4bb0553 100644
--- a/drivers/mmc/host/tmio_mmc_pio.c
+++ b/drivers/mmc/host/tmio_mmc_pio.c
@@ -792,6 +792,14 @@ static int tmio_mmc_start_data(struct tmio_mmc_host *host,
 	return 0;
 }
 
+static void tmio_mmc_hw_reset(struct mmc_host *mmc)
+{
+	struct tmio_mmc_host *host = mmc_priv(mmc);
+
+	if (host->hw_reset)
+		host->hw_reset(host);
+}
+
 /* Process requests from the MMC layer */
 static void tmio_mmc_request(struct mmc_host *mmc, struct mmc_request *mrq)
 {
@@ -1008,6 +1016,7 @@ static struct mmc_host_ops tmio_mmc_ops = {
 	.get_cd		= mmc_gpio_get_cd,
 	.enable_sdio_irq = tmio_mmc_enable_sdio_irq,
 	.multi_io_quirk	= tmio_multi_io_quirk,
+	.hw_reset	= tmio_mmc_hw_reset,
 };
 
 static int tmio_mmc_init_ocr(struct tmio_mmc_host *host)
-- 
2.7.4

[cip-dev] [PATCH 4.4.y-cip 40/83] mmc: core: Add helper to see if a host can be retuned

[Biju Das]

From: Simon Horman <horms+renesas@verge.net.au>

commit c820af5f18ec248b3cb61a9a9ce47ef0f2e9ec63 upstream.

This is in preparation for restoring saved tuning parameters
when resuming the TMIO driver.

Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
Acked-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Tested-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Biju Das <biju.das@bp.renesas.com>
---
 include/linux/mmc/host.h | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/include/linux/mmc/host.h b/include/linux/mmc/host.h
index 8673ffe..1c483d9 100644
--- a/include/linux/mmc/host.h
+++ b/include/linux/mmc/host.h
@@ -515,4 +515,9 @@ static inline void mmc_retune_recheck(struct mmc_host *host)
 		host->retune_now = 1;
 }
 
+static inline bool mmc_can_retune(struct mmc_host *host)
+{
+	return host->can_retune == 1;
+}
+
 #endif /* LINUX_MMC_HOST_H */
-- 
2.7.4

[cip-dev] [PATCH 4.4.y-cip 41/83] mmc: tmio: Add tuning support

[Biju Das]

From: Ai Kyuse <ai.kyuse.uw@renesas.com>

commit 4f11997773b6b452b5a0d620c5ac5050e75c227e upstream.

Add tuning support for use with SDR104 mode

Signed-off-by: Ai Kyuse <ai.kyuse.uw@renesas.com>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
Acked-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Tested-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Biju Das <biju.das@bp.renesas.com>
---
 drivers/mmc/host/tmio_mmc.h     | 14 ++++++++++
 drivers/mmc/host/tmio_mmc_pio.c | 62 +++++++++++++++++++++++++++++++++++++++++
 2 files changed, 76 insertions(+)

diff --git a/drivers/mmc/host/tmio_mmc.h b/drivers/mmc/host/tmio_mmc.h
index 8b4869e..ba2838c 100644
--- a/drivers/mmc/host/tmio_mmc.h
+++ b/drivers/mmc/host/tmio_mmc.h
@@ -153,6 +153,7 @@ struct tmio_mmc_host {
 	struct mutex		ios_lock;	/* protect set_ios() context */
 	bool			native_hotplug;
 	bool			sdio_irq_enabled;
+	u32			scc_tappos;
 
 	/* Mandatory callback */
 	int (*clk_enable)(struct tmio_mmc_host *host);
@@ -168,6 +169,19 @@ struct tmio_mmc_host {
 					   struct mmc_ios *ios);
 	int (*write16_hook)(struct tmio_mmc_host *host, int addr);
 	void (*hw_reset)(struct tmio_mmc_host *host);
+	void (*prepare_tuning)(struct tmio_mmc_host *host, unsigned long tap);
+	bool (*check_scc_error)(struct tmio_mmc_host *host);
+
+	/*
+	 * Mandatory callback for tuning to occur which is optional for SDR50
+	 * and mandatory for SDR104.
+	 */
+	unsigned int (*init_tuning)(struct tmio_mmc_host *host);
+	int (*select_tuning)(struct tmio_mmc_host *host);
+
+	/* Tuning values: 1 for success, 0 for failure */
+	DECLARE_BITMAP(taps, BITS_PER_BYTE * sizeof(long));
+	unsigned int tap_num;
 };
 
 struct tmio_mmc_host *tmio_mmc_host_alloc(struct platform_device *pdev);
diff --git a/drivers/mmc/host/tmio_mmc_pio.c b/drivers/mmc/host/tmio_mmc_pio.c
index 4bb0553..37703bf 100644
--- a/drivers/mmc/host/tmio_mmc_pio.c
+++ b/drivers/mmc/host/tmio_mmc_pio.c
@@ -36,6 +36,7 @@
 #include <linux/io.h>
 #include <linux/irq.h>
 #include <linux/mfd/tmio.h>
+#include <linux/mmc/card.h>
 #include <linux/mmc/host.h>
 #include <linux/mmc/mmc.h>
 #include <linux/mmc/slot-gpio.h>
@@ -298,6 +299,9 @@ static void tmio_mmc_finish_request(struct tmio_mmc_host *host)
 	if (mrq->cmd->error || (mrq->data && mrq->data->error))
 		tmio_mmc_abort_dma(host);
 
+	if (host->check_scc_error)
+		host->check_scc_error(host);
+
 	mmc_request_done(host->mmc, mrq);
 }
 
@@ -800,6 +804,55 @@ static void tmio_mmc_hw_reset(struct mmc_host *mmc)
 		host->hw_reset(host);
 }
 
+static int tmio_mmc_execute_tuning(struct mmc_host *mmc, u32 opcode)
+{
+	struct tmio_mmc_host *host = mmc_priv(mmc);
+	int i, ret = 0;
+
+	if (!host->tap_num) {
+		if (!host->init_tuning || !host->select_tuning)
+			/* Tuning is not supported */
+			goto out;
+
+		host->tap_num = host->init_tuning(host);
+		if (!host->tap_num)
+			/* Tuning is not supported */
+			goto out;
+	}
+
+	if (host->tap_num * 2 >= sizeof(host->taps) * BITS_PER_BYTE) {
+		dev_warn_once(&host->pdev->dev,
+		      "Too many taps, skipping tuning. Please consider updating size of taps field of tmio_mmc_host\n");
+		goto out;
+	}
+
+	bitmap_zero(host->taps, host->tap_num * 2);
+
+	/* Issue CMD19 twice for each tap */
+	for (i = 0; i < 2 * host->tap_num; i++) {
+		if (host->prepare_tuning)
+			host->prepare_tuning(host, i % host->tap_num);
+
+		ret = mmc_send_tuning(mmc, opcode, NULL);
+		if (ret && ret != -EILSEQ)
+			goto out;
+		if (ret == 0)
+			set_bit(i, host->taps);
+
+		mdelay(1);
+	}
+
+	ret = host->select_tuning(host);
+
+out:
+	if (ret < 0) {
+		dev_warn(&host->pdev->dev, "Tuning procedure failed\n");
+		tmio_mmc_hw_reset(mmc);
+	}
+
+	return ret;
+}
+
 /* Process requests from the MMC layer */
 static void tmio_mmc_request(struct mmc_host *mmc, struct mmc_request *mrq)
 {
@@ -1017,6 +1070,7 @@ static struct mmc_host_ops tmio_mmc_ops = {
 	.enable_sdio_irq = tmio_mmc_enable_sdio_irq,
 	.multi_io_quirk	= tmio_multi_io_quirk,
 	.hw_reset	= tmio_mmc_hw_reset,
+	.execute_tuning = tmio_mmc_execute_tuning,
 };
 
 static int tmio_mmc_init_ocr(struct tmio_mmc_host *host)
@@ -1263,6 +1317,11 @@ int tmio_mmc_host_runtime_suspend(struct device *dev)
 }
 EXPORT_SYMBOL(tmio_mmc_host_runtime_suspend);
 
+static bool tmio_mmc_can_retune(struct tmio_mmc_host *host)
+{
+	return host->tap_num && mmc_can_retune(host->mmc);
+}
+
 int tmio_mmc_host_runtime_resume(struct device *dev)
 {
 	struct mmc_host *mmc = dev_get_drvdata(dev);
@@ -1276,6 +1335,9 @@ int tmio_mmc_host_runtime_resume(struct device *dev)
 
 	tmio_mmc_enable_dma(host, true);
 
+	if (tmio_mmc_can_retune(host) && host->select_tuning(host))
+		dev_warn(&host->pdev->dev, "Tuning selection failed\n");
+
 	return 0;
 }
 EXPORT_SYMBOL(tmio_mmc_host_runtime_resume);
-- 
2.7.4

[cip-dev] [PATCH 4.4.y-cip 42/83] mmc: sh_mobile_sdhi: Add tuning support

[Biju Das]

From: Simon Horman <horms+renesas@verge.net.au>

commit 06f438dd389a699d27585f2a4d3685fd1ce05a75 upstream.

Add tuning support for use with SDR104 mode
This includes adding support for the sampling clock controller (SCC).

Based on work by Ai Kyuse.

Cc: Ai Kyuse <ai.kyuse.uw@renesas.com>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
Acked-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Tested-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Biju Das <biju.das@bp.renesas.com>
---
 drivers/mmc/host/sh_mobile_sdhi.c | 265 +++++++++++++++++++++++++++++++++++++-
 1 file changed, 264 insertions(+), 1 deletion(-)

diff --git a/drivers/mmc/host/sh_mobile_sdhi.c b/drivers/mmc/host/sh_mobile_sdhi.c
index 9124246..d1ec75c 100644
--- a/drivers/mmc/host/sh_mobile_sdhi.c
+++ b/drivers/mmc/host/sh_mobile_sdhi.c
@@ -47,6 +47,11 @@
 
 #define host_to_priv(host) container_of((host)->pdata, struct sh_mobile_sdhi, mmc_data)
 
+struct sh_mobile_sdhi_scc {
+	unsigned long clk_rate;	/* clock rate for SDR104 */
+	u32 tap;		/* sampling clock position for SDR104 */
+};
+
 struct sh_mobile_sdhi_of_data {
 	unsigned long tmio_flags;
 	u32	      tmio_ocr_mask;
@@ -55,6 +60,9 @@ struct sh_mobile_sdhi_of_data {
 	enum dma_slave_buswidth dma_buswidth;
 	dma_addr_t dma_rx_offset;
 	unsigned bus_shift;
+	int scc_offset;
+	struct sh_mobile_sdhi_scc *taps;
+	int taps_num;
 };
 
 static const struct sh_mobile_sdhi_of_data sh_mobile_sdhi_of_cfg[] = {
@@ -69,12 +77,35 @@ static const struct sh_mobile_sdhi_of_data of_rcar_gen1_compatible = {
 	.capabilities	= MMC_CAP_SD_HIGHSPEED | MMC_CAP_SDIO_IRQ,
 };
 
+/* Definitions for sampling clocks */
+static struct sh_mobile_sdhi_scc rcar_gen2_scc_taps[] = {
+	{
+		.clk_rate = 156000000,
+		.tap = 0x00000703,
+	},
+	{
+		.clk_rate = 0,
+		.tap = 0x00000300,
+	},
+};
+
 static const struct sh_mobile_sdhi_of_data of_rcar_gen2_compatible = {
 	.tmio_flags	= TMIO_MMC_HAS_IDLE_WAIT | TMIO_MMC_WRPROTECT_DISABLE |
 			  TMIO_MMC_CLK_ACTUAL | TMIO_MMC_MIN_RCAR2,
 	.capabilities	= MMC_CAP_SD_HIGHSPEED | MMC_CAP_SDIO_IRQ,
 	.dma_buswidth	= DMA_SLAVE_BUSWIDTH_4_BYTES,
 	.dma_rx_offset	= 0x2000,
+	.scc_offset	= 0x0300,
+	.taps		= rcar_gen2_scc_taps,
+	.taps_num	= ARRAY_SIZE(rcar_gen2_scc_taps),
+};
+
+/* Definitions for sampling clocks */
+static struct sh_mobile_sdhi_scc rcar_gen3_scc_taps[] = {
+	{
+		.clk_rate = 0,
+		.tap = 0x00000300,
+	},
 };
 
 static const struct sh_mobile_sdhi_of_data of_rcar_gen3_compatible = {
@@ -82,6 +113,9 @@ static const struct sh_mobile_sdhi_of_data of_rcar_gen3_compatible = {
 			  TMIO_MMC_CLK_ACTUAL | TMIO_MMC_MIN_RCAR2,
 	.capabilities	= MMC_CAP_SD_HIGHSPEED,
 	.bus_shift	= 2,
+	.scc_offset	= 0x1000,
+	.taps		= rcar_gen3_scc_taps,
+	.taps_num	= ARRAY_SIZE(rcar_gen3_scc_taps),
 };
 
 static const struct of_device_id sh_mobile_sdhi_of_match[] = {
@@ -109,6 +143,7 @@ struct sh_mobile_sdhi {
 	struct tmio_mmc_dma dma_priv;
 	struct pinctrl *pinctrl;
 	struct pinctrl_state *pins_default, *pins_uhs;
+	void __iomem *scc_ctl;
 };
 
 static void sh_mobile_sdhi_sdbuf_width(struct tmio_mmc_host *host, int width)
@@ -263,6 +298,201 @@ static int sh_mobile_sdhi_start_signal_voltage_switch(struct mmc_host *mmc,
 	return 0;
 }
 
+/* SCC registers */
+#define SH_MOBILE_SDHI_SCC_DTCNTL	0x000
+#define SH_MOBILE_SDHI_SCC_TAPSET	0x002
+#define SH_MOBILE_SDHI_SCC_DT2FF	0x004
+#define SH_MOBILE_SDHI_SCC_CKSEL	0x006
+#define SH_MOBILE_SDHI_SCC_RVSCNTL	0x008
+#define SH_MOBILE_SDHI_SCC_RVSREQ	0x00A
+
+/* Definitions for values the SH_MOBILE_SDHI_SCC_DTCNTL register */
+#define SH_MOBILE_SDHI_SCC_DTCNTL_TAPEN		BIT(0)
+#define SH_MOBILE_SDHI_SCC_DTCNTL_TAPNUM_SHIFT	16
+#define SH_MOBILE_SDHI_SCC_DTCNTL_TAPNUM_MASK	0xff
+
+/* Definitions for values the SH_MOBILE_SDHI_SCC_CKSEL register */
+#define SH_MOBILE_SDHI_SCC_CKSEL_DTSEL		BIT(0)
+/* Definitions for values the SH_MOBILE_SDHI_SCC_RVSCNTL register */
+#define SH_MOBILE_SDHI_SCC_RVSCNTL_RVSEN	BIT(0)
+/* Definitions for values the SH_MOBILE_SDHI_SCC_RVSREQ register */
+#define SH_MOBILE_SDHI_SCC_RVSREQ_RVSERR	BIT(2)
+
+static inline u32 sd_scc_read32(struct tmio_mmc_host *host,
+				struct sh_mobile_sdhi *priv, int addr)
+{
+	return readl(priv->scc_ctl + (addr << host->bus_shift));
+}
+
+static inline void sd_scc_write32(struct tmio_mmc_host *host,
+				  struct sh_mobile_sdhi *priv,
+				  int addr, u32 val)
+{
+	writel(val, priv->scc_ctl + (addr << host->bus_shift));
+}
+
+static unsigned int sh_mobile_sdhi_init_tuning(struct tmio_mmc_host *host)
+{
+	struct sh_mobile_sdhi *priv;
+
+	if (!(host->mmc->caps & MMC_CAP_UHS_SDR104))
+		return 0;
+
+	priv = host_to_priv(host);
+
+	/* set sampling clock selection range */
+	sd_scc_write32(host, priv, SH_MOBILE_SDHI_SCC_DTCNTL,
+		       0x8 << SH_MOBILE_SDHI_SCC_DTCNTL_TAPNUM_SHIFT);
+
+	/* Initialize SCC */
+	sd_ctrl_write32_as_16_and_16(host, CTL_STATUS, 0x0);
+
+	sd_scc_write32(host, priv, SH_MOBILE_SDHI_SCC_DTCNTL,
+		       SH_MOBILE_SDHI_SCC_DTCNTL_TAPEN |
+		       sd_scc_read32(host, priv, SH_MOBILE_SDHI_SCC_DTCNTL));
+
+	sd_ctrl_write16(host, CTL_SD_CARD_CLK_CTL, ~CLK_CTL_SCLKEN &
+			sd_ctrl_read16(host, CTL_SD_CARD_CLK_CTL));
+
+	sd_scc_write32(host, priv, SH_MOBILE_SDHI_SCC_CKSEL,
+		       SH_MOBILE_SDHI_SCC_CKSEL_DTSEL |
+		       sd_scc_read32(host, priv, SH_MOBILE_SDHI_SCC_CKSEL));
+
+	sd_ctrl_write16(host, CTL_SD_CARD_CLK_CTL, CLK_CTL_SCLKEN |
+			sd_ctrl_read16(host, CTL_SD_CARD_CLK_CTL));
+
+	sd_scc_write32(host, priv, SH_MOBILE_SDHI_SCC_RVSCNTL,
+		       ~SH_MOBILE_SDHI_SCC_RVSCNTL_RVSEN &
+		       sd_scc_read32(host, priv, SH_MOBILE_SDHI_SCC_RVSCNTL));
+
+	sd_scc_write32(host, priv, SH_MOBILE_SDHI_SCC_DT2FF, host->scc_tappos);
+
+	/* Read TAPNUM */
+	return (sd_scc_read32(host, priv, SH_MOBILE_SDHI_SCC_DTCNTL) >>
+		SH_MOBILE_SDHI_SCC_DTCNTL_TAPNUM_SHIFT) &
+		SH_MOBILE_SDHI_SCC_DTCNTL_TAPNUM_MASK;
+}
+
+static void sh_mobile_sdhi_prepare_tuning(struct tmio_mmc_host *host,
+					 unsigned long tap)
+{
+	struct sh_mobile_sdhi *priv = host_to_priv(host);
+
+	/* Set sampling clock position */
+	sd_scc_write32(host, priv, SH_MOBILE_SDHI_SCC_TAPSET, tap);
+}
+
+#define SH_MOBILE_SDHI_MAX_TAP 3
+
+static int sh_mobile_sdhi_select_tuning(struct tmio_mmc_host *host)
+{
+	struct sh_mobile_sdhi *priv = host_to_priv(host);
+	unsigned long tap_cnt;  /* counter of tuning success */
+	unsigned long tap_set;  /* tap position */
+	unsigned long tap_start;/* start position of tuning success */
+	unsigned long tap_end;  /* end position of tuning success */
+	unsigned long ntap;     /* temporary counter of tuning success */
+	unsigned long i;
+
+	/* Clear SCC_RVSREQ */
+	sd_scc_write32(host, priv, SH_MOBILE_SDHI_SCC_RVSREQ, 0);
+
+	/*
+	 * Find the longest consecutive run of successful probes.  If that
+	 * is more than SH_MOBILE_SDHI_MAX_TAP probes long then use the
+	 * center index as the tap.
+	 */
+	tap_cnt = 0;
+	ntap = 0;
+	tap_start = 0;
+	tap_end = 0;
+	for (i = 0; i < host->tap_num * 2; i++) {
+		if (test_bit(i, host->taps))
+			ntap++;
+		else {
+			if (ntap > tap_cnt) {
+				tap_start = i - ntap;
+				tap_end = i - 1;
+				tap_cnt = ntap;
+			}
+			ntap = 0;
+		}
+	}
+
+	if (ntap > tap_cnt) {
+		tap_start = i - ntap;
+		tap_end = i - 1;
+		tap_cnt = ntap;
+	}
+
+	if (tap_cnt >= SH_MOBILE_SDHI_MAX_TAP)
+		tap_set = (tap_start + tap_end) / 2 % host->tap_num;
+	else
+		return -EIO;
+
+	/* Set SCC */
+	sd_scc_write32(host, priv, SH_MOBILE_SDHI_SCC_TAPSET, tap_set);
+
+	/* Enable auto re-tuning */
+	sd_scc_write32(host, priv, SH_MOBILE_SDHI_SCC_RVSCNTL,
+		       SH_MOBILE_SDHI_SCC_RVSCNTL_RVSEN |
+		       sd_scc_read32(host, priv, SH_MOBILE_SDHI_SCC_RVSCNTL));
+
+	return 0;
+}
+
+
+static bool sh_mobile_sdhi_check_scc_error(struct tmio_mmc_host *host)
+{
+	struct sh_mobile_sdhi *priv;
+
+	if (!(host->mmc->caps & MMC_CAP_UHS_SDR104))
+		return 0;
+
+	priv = host_to_priv(host);
+
+	/* Check SCC error */
+	if (sd_scc_read32(host, priv, SH_MOBILE_SDHI_SCC_RVSCNTL) &
+	    SH_MOBILE_SDHI_SCC_RVSCNTL_RVSEN &&
+	    sd_scc_read32(host, priv, SH_MOBILE_SDHI_SCC_RVSREQ) &
+	    SH_MOBILE_SDHI_SCC_RVSREQ_RVSERR) {
+		/* Clear SCC error */
+		sd_scc_write32(host, priv, SH_MOBILE_SDHI_SCC_RVSREQ, 0);
+		return true;
+	}
+
+	return false;
+}
+
+static void sh_mobile_sdhi_hw_reset(struct tmio_mmc_host *host)
+{
+	struct sh_mobile_sdhi *priv;
+
+	if (!(host->mmc->caps & MMC_CAP_UHS_SDR104))
+		return;
+
+	priv = host_to_priv(host);
+
+	/* Reset SCC */
+	sd_ctrl_write16(host, CTL_SD_CARD_CLK_CTL, ~CLK_CTL_SCLKEN &
+			sd_ctrl_read16(host, CTL_SD_CARD_CLK_CTL));
+
+	sd_scc_write32(host, priv, SH_MOBILE_SDHI_SCC_CKSEL,
+		       ~SH_MOBILE_SDHI_SCC_CKSEL_DTSEL &
+		       sd_scc_read32(host, priv, SH_MOBILE_SDHI_SCC_CKSEL));
+
+	sd_ctrl_write16(host, CTL_SD_CARD_CLK_CTL, CLK_CTL_SCLKEN |
+			sd_ctrl_read16(host, CTL_SD_CARD_CLK_CTL));
+
+	sd_scc_write32(host, priv, SH_MOBILE_SDHI_SCC_RVSCNTL,
+		       ~SH_MOBILE_SDHI_SCC_RVSCNTL_RVSEN &
+		       sd_scc_read32(host, priv, SH_MOBILE_SDHI_SCC_RVSCNTL));
+
+	sd_scc_write32(host, priv, SH_MOBILE_SDHI_SCC_RVSCNTL,
+		       ~SH_MOBILE_SDHI_SCC_RVSCNTL_RVSEN &
+		       sd_scc_read32(host, priv, SH_MOBILE_SDHI_SCC_RVSCNTL));
+}
+
 static int sh_mobile_sdhi_wait_idle(struct tmio_mmc_host *host)
 {
 	int timeout = 1000;
@@ -332,7 +562,7 @@ static int sh_mobile_sdhi_probe(struct platform_device *pdev)
 	struct tmio_mmc_data *mmd = pdev->dev.platform_data;
 	struct tmio_mmc_host *host;
 	struct resource *res;
-	int irq, ret, i = 0;
+	int irq, ret, i;
 	struct tmio_mmc_dma *dma_priv;
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
@@ -392,6 +622,11 @@ static int sh_mobile_sdhi_probe(struct platform_device *pdev)
 		host->card_busy	= sh_mobile_sdhi_card_busy;
 		host->start_signal_voltage_switch =
 			sh_mobile_sdhi_start_signal_voltage_switch;
+		host->init_tuning	= sh_mobile_sdhi_init_tuning;
+		host->prepare_tuning	= sh_mobile_sdhi_prepare_tuning;
+		host->select_tuning	= sh_mobile_sdhi_select_tuning;
+		host->check_scc_error	= sh_mobile_sdhi_check_scc_error;
+		host->hw_reset		= sh_mobile_sdhi_hw_reset;
 	}
 
 	/* Orginally registers were 16 bit apart, could be 32 or 64 nowadays */
@@ -432,6 +667,34 @@ static int sh_mobile_sdhi_probe(struct platform_device *pdev)
 	if (ret < 0)
 		goto efree;
 
+	if (host->mmc->caps & MMC_CAP_UHS_SDR104) {
+		host->mmc->caps |= MMC_CAP_HW_RESET;
+
+		if (of_id && of_id->data) {
+			const struct sh_mobile_sdhi_of_data *of_data;
+			const struct sh_mobile_sdhi_scc *taps;
+			bool hit = false;
+
+			of_data = of_id->data;
+			taps = of_data->taps;
+
+			for (i = 0; i < of_data->taps_num; i++) {
+				if (taps[i].clk_rate == 0 ||
+				    taps[i].clk_rate == host->mmc->f_max) {
+					host->scc_tappos = taps->tap;
+					hit = true;
+					break;
+				}
+			}
+
+			if (!hit)
+				dev_warn(&host->pdev->dev, "Unknown clock rate for SDR104\n");
+
+			priv->scc_ctl = host->ctl + of_data->scc_offset;
+		}
+	}
+
+	i = 0;
 	while (1) {
 		irq = platform_get_irq(pdev, i);
 		if (irq < 0)
-- 
2.7.4

[cip-dev] [PATCH 4.4.y-cip 43/83] mmc: tmio: fix wrong bitmask for SDIO irqs

[Biju Das]

From: Wolfram Sang <wsa+renesas@sang-engineering.com>

commit 0c4bf5beff79fd32c5a3b2b511ed6527861ada18 upstream.

Commit 7729c7a232a953 ("mmc: tmio: Provide separate interrupt handlers")
refactored the sdio irq handler and wrongly used the mask for SD irqs,
not for SDIO irqs. This doesn't really matter in practice because both
values keep the only interrupt we are interested in. But still, this is
wrong and wants to be fixed.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Simon Horman <horms+renesas@verge.net.au>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Biju Das <biju.das@bp.renesas.com>
---
 drivers/mmc/host/tmio_mmc_pio.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/mmc/host/tmio_mmc_pio.c b/drivers/mmc/host/tmio_mmc_pio.c
index 37703bf..3a69ff5 100644
--- a/drivers/mmc/host/tmio_mmc_pio.c
+++ b/drivers/mmc/host/tmio_mmc_pio.c
@@ -724,7 +724,7 @@ static bool tmio_mmc_sdio_irq(int irq, void *devid)
 		return false;
 
 	status = sd_ctrl_read16(host, CTL_SDIO_STATUS);
-	ireg = status & TMIO_SDIO_MASK_ALL & ~host->sdcard_irq_mask;
+	ireg = status & TMIO_SDIO_MASK_ALL & ~host->sdio_irq_mask;
 
 	sdio_status = status & ~TMIO_SDIO_MASK_ALL;
 	if (pdata->flags & TMIO_MMC_SDIO_STATUS_QUIRK)
-- 
2.7.4

[cip-dev] [PATCH 4.4.y-cip 44/83] mmc: tmio: remove SDIO from TODO list

[Biju Das]

From: Wolfram Sang <wsa+renesas@sang-engineering.com>

commit e726e8c959fc735473f248e142de4d4f77ed342b upstream.

We surely have SDIO support by now :)

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Simon Horman <horms+renesas@verge.net.au>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Biju Das <biju.das@bp.renesas.com>
---
 drivers/mmc/host/tmio_mmc_pio.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/drivers/mmc/host/tmio_mmc_pio.c b/drivers/mmc/host/tmio_mmc_pio.c
index 3a69ff5..fee72a9 100644
--- a/drivers/mmc/host/tmio_mmc_pio.c
+++ b/drivers/mmc/host/tmio_mmc_pio.c
@@ -22,7 +22,6 @@
  * TODO:
  *   Investigate using a workqueue for PIO transfers
  *   Eliminate FIXMEs
- *   SDIO support
  *   Better Power management
  *   Handle MMC errors better
  *   double buffer support
-- 
2.7.4

[cip-dev] [PATCH 4.4.y-cip 45/83] mmc: tmio: use SDIO master interrupt bit only when allowed

[Biju Das]

From: Wolfram Sang <wsa+renesas@sang-engineering.com>

commit c51ff6c6180e76a1ba96aef799a9c41aa80fcc95 upstream.

The master bit to enable SDIO interrupts can only be accessed if
SCLKDIVEN bit allows that. However, the core uses the SDIO enable
callback at times when SCLKDIVEN forbids the change. This leads to
"timeout waiting for SD bus idle" messages.

We now activate the master bit in probe once if SDIO is supported. IRQ
en-/disabling will be done now by the individual IRQ enablement bits
only.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Yasushi SHOJI <yashi@atmark-techno.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Biju Das <biju.das@bp.renesas.com>
---
 drivers/mmc/host/tmio_mmc_pio.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/drivers/mmc/host/tmio_mmc_pio.c b/drivers/mmc/host/tmio_mmc_pio.c
index fee72a9..87f7aa7 100644
--- a/drivers/mmc/host/tmio_mmc_pio.c
+++ b/drivers/mmc/host/tmio_mmc_pio.c
@@ -140,12 +140,10 @@ static void tmio_mmc_enable_sdio_irq(struct mmc_host *mmc, int enable)
 
 		host->sdio_irq_mask = TMIO_SDIO_MASK_ALL &
 					~TMIO_SDIO_STAT_IOIRQ;
-		sd_ctrl_write16(host, CTL_TRANSACTION_CTL, 0x0001);
 		sd_ctrl_write16(host, CTL_SDIO_IRQ_MASK, host->sdio_irq_mask);
 	} else if (!enable && host->sdio_irq_enabled) {
 		host->sdio_irq_mask = TMIO_SDIO_MASK_ALL;
 		sd_ctrl_write16(host, CTL_SDIO_IRQ_MASK, host->sdio_irq_mask);
-		sd_ctrl_write16(host, CTL_TRANSACTION_CTL, 0x0000);
 
 		host->sdio_irq_enabled = false;
 		pm_runtime_mark_last_busy(mmc_dev(mmc));
@@ -1235,7 +1233,7 @@ int tmio_mmc_host_probe(struct tmio_mmc_host *_host,
 	if (pdata->flags & TMIO_MMC_SDIO_IRQ) {
 		_host->sdio_irq_mask = TMIO_SDIO_MASK_ALL;
 		sd_ctrl_write16(_host, CTL_SDIO_IRQ_MASK, _host->sdio_irq_mask);
-		sd_ctrl_write16(_host, CTL_TRANSACTION_CTL, 0x0000);
+		sd_ctrl_write16(_host, CTL_TRANSACTION_CTL, 0x0001);
 	}
 
 	spin_lock_init(&_host->lock);
@@ -1283,6 +1281,9 @@ void tmio_mmc_host_remove(struct tmio_mmc_host *host)
 	struct platform_device *pdev = host->pdev;
 	struct mmc_host *mmc = host->mmc;
 
+	if (host->pdata->flags & TMIO_MMC_SDIO_IRQ)
+		sd_ctrl_write16(host, CTL_TRANSACTION_CTL, 0x0000);
+
 	if (!host->native_hotplug)
 		pm_runtime_get_sync(&pdev->dev);
 
-- 
2.7.4

[cip-dev] [PATCH 4.4.y-cip 46/83] mmc: sh_mobile_sdhi: simplify accessing DT data

[Biju Das]

From: Wolfram Sang <wsa+renesas@sang-engineering.com>

commit dc9f1a8d790ee766c47eca163261225680691e64 upstream.

By using the helper of_device_get_match_data(), we can skip some
checking and make the code simpler.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Biju Das <biju.das@bp.renesas.com>
---
 drivers/mmc/host/sh_mobile_sdhi.c | 14 ++++----------
 1 file changed, 4 insertions(+), 10 deletions(-)

diff --git a/drivers/mmc/host/sh_mobile_sdhi.c b/drivers/mmc/host/sh_mobile_sdhi.c
index d1ec75c..9af62dd 100644
--- a/drivers/mmc/host/sh_mobile_sdhi.c
+++ b/drivers/mmc/host/sh_mobile_sdhi.c
@@ -555,8 +555,7 @@ static void sh_mobile_sdhi_enable_dma(struct tmio_mmc_host *host, bool enable)
 
 static int sh_mobile_sdhi_probe(struct platform_device *pdev)
 {
-	const struct of_device_id *of_id =
-		of_match_device(sh_mobile_sdhi_of_match, &pdev->dev);
+	const struct sh_mobile_sdhi_of_data *of_data = of_device_get_match_data(&pdev->dev);
 	struct sh_mobile_sdhi *priv;
 	struct tmio_mmc_data *mmc_data;
 	struct tmio_mmc_data *mmd = pdev->dev.platform_data;
@@ -597,9 +596,8 @@ static int sh_mobile_sdhi_probe(struct platform_device *pdev)
 		goto eprobe;
 	}
 
-	if (of_id && of_id->data) {
-		const struct sh_mobile_sdhi_of_data *of_data = of_id->data;
 
+	if (of_data) {
 		mmc_data->flags |= of_data->tmio_flags;
 		mmc_data->ocr_mask = of_data->tmio_ocr_mask;
 		mmc_data->capabilities |= of_data->capabilities;
@@ -670,14 +668,10 @@ static int sh_mobile_sdhi_probe(struct platform_device *pdev)
 	if (host->mmc->caps & MMC_CAP_UHS_SDR104) {
 		host->mmc->caps |= MMC_CAP_HW_RESET;
 
-		if (of_id && of_id->data) {
-			const struct sh_mobile_sdhi_of_data *of_data;
-			const struct sh_mobile_sdhi_scc *taps;
+		if (of_data) {
+			const struct sh_mobile_sdhi_scc *taps = of_data->taps;
 			bool hit = false;
 
-			of_data = of_id->data;
-			taps = of_data->taps;
-
 			for (i = 0; i < of_data->taps_num; i++) {
 				if (taps[i].clk_rate == 0 ||
 				    taps[i].clk_rate == host->mmc->f_max) {
-- 
2.7.4

[cip-dev] [PATCH 4.4.y-cip 47/83] mmc: sh_mobile_sdhi: improve prerequisite for hw_reset

[Biju Das]

From: Wolfram Sang <wsa+renesas@sang-engineering.com>

commit 6ade9a2c2da855ff38e74c4298976400feca968e upstream.

We need a SCC unit for hw_reset. Those units can only be described in
of_data. So, of_data and a valid SCC offset are prerequisites for
enabling the hw_reset capability. Merge the two 'if' conditions into one
and add a check for an scc offset.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Biju Das <biju.das@bp.renesas.com>
---
 drivers/mmc/host/sh_mobile_sdhi.c | 30 ++++++++++++++----------------
 1 file changed, 14 insertions(+), 16 deletions(-)

diff --git a/drivers/mmc/host/sh_mobile_sdhi.c b/drivers/mmc/host/sh_mobile_sdhi.c
index 9af62dd..9bf1f5e 100644
--- a/drivers/mmc/host/sh_mobile_sdhi.c
+++ b/drivers/mmc/host/sh_mobile_sdhi.c
@@ -665,27 +665,25 @@ static int sh_mobile_sdhi_probe(struct platform_device *pdev)
 	if (ret < 0)
 		goto efree;
 
-	if (host->mmc->caps & MMC_CAP_UHS_SDR104) {
+	if (of_data && of_data->scc_offset && host->mmc->caps & MMC_CAP_UHS_SDR104) {
+		const struct sh_mobile_sdhi_scc *taps = of_data->taps;
+		bool hit = false;
+
 		host->mmc->caps |= MMC_CAP_HW_RESET;
 
-		if (of_data) {
-			const struct sh_mobile_sdhi_scc *taps = of_data->taps;
-			bool hit = false;
-
-			for (i = 0; i < of_data->taps_num; i++) {
-				if (taps[i].clk_rate == 0 ||
-				    taps[i].clk_rate == host->mmc->f_max) {
-					host->scc_tappos = taps->tap;
-					hit = true;
-					break;
-				}
+		for (i = 0; i < of_data->taps_num; i++) {
+			if (taps[i].clk_rate == 0 ||
+			    taps[i].clk_rate == host->mmc->f_max) {
+				host->scc_tappos = taps->tap;
+				hit = true;
+				break;
 			}
+		}
 
-			if (!hit)
-				dev_warn(&host->pdev->dev, "Unknown clock rate for SDR104\n");
+		if (!hit)
+			dev_warn(&host->pdev->dev, "Unknown clock rate for SDR104\n");
 
-			priv->scc_ctl = host->ctl + of_data->scc_offset;
-		}
+		priv->scc_ctl = host->ctl + of_data->scc_offset;
 	}
 
 	i = 0;
-- 
2.7.4

[cip-dev] [PATCH 4.4.y-cip 48/83] mmc: sh_mobile_sdhi: remove superfluous check in hw_reset

[Biju Das]

From: Wolfram Sang <wsa+renesas@sang-engineering.com>

commit 97c64b2cd57608f7064810780056d17944f49128 upstream.

The capability for HW_RESET is only activated if SDR104 is present, so
no need to check for SDR104 in the function itself again.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Biju Das <biju.das@bp.renesas.com>
---
 drivers/mmc/host/sh_mobile_sdhi.c | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/drivers/mmc/host/sh_mobile_sdhi.c b/drivers/mmc/host/sh_mobile_sdhi.c
index 9bf1f5e..d3d1db0 100644
--- a/drivers/mmc/host/sh_mobile_sdhi.c
+++ b/drivers/mmc/host/sh_mobile_sdhi.c
@@ -468,9 +468,6 @@ static void sh_mobile_sdhi_hw_reset(struct tmio_mmc_host *host)
 {
 	struct sh_mobile_sdhi *priv;
 
-	if (!(host->mmc->caps & MMC_CAP_UHS_SDR104))
-		return;
-
 	priv = host_to_priv(host);
 
 	/* Reset SCC */
-- 
2.7.4

[cip-dev] [PATCH 4.4.y-cip 49/83] mmc: sh_mobile_sdhi: improve prerequisites for tuning

[Biju Das]

From: Wolfram Sang <wsa+renesas@sang-engineering.com>

commit e831ead3b3ddc4227cef10dc63d919fd7242d7b8 upstream.

Prerequisites for tuning are the same as for hw_reset. We need an SCC
and a supported mode. Populate the tuning related functions only when
those conditions are met. This also removes a tiny race window.
Previously, the functions were populated when the SCC offset was not
initialized which could have led to an OOPS.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Biju Das <biju.das@bp.renesas.com>
---
 drivers/mmc/host/sh_mobile_sdhi.c | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/drivers/mmc/host/sh_mobile_sdhi.c b/drivers/mmc/host/sh_mobile_sdhi.c
index d3d1db0..30956c7 100644
--- a/drivers/mmc/host/sh_mobile_sdhi.c
+++ b/drivers/mmc/host/sh_mobile_sdhi.c
@@ -617,11 +617,6 @@ static int sh_mobile_sdhi_probe(struct platform_device *pdev)
 		host->card_busy	= sh_mobile_sdhi_card_busy;
 		host->start_signal_voltage_switch =
 			sh_mobile_sdhi_start_signal_voltage_switch;
-		host->init_tuning	= sh_mobile_sdhi_init_tuning;
-		host->prepare_tuning	= sh_mobile_sdhi_prepare_tuning;
-		host->select_tuning	= sh_mobile_sdhi_select_tuning;
-		host->check_scc_error	= sh_mobile_sdhi_check_scc_error;
-		host->hw_reset		= sh_mobile_sdhi_hw_reset;
 	}
 
 	/* Orginally registers were 16 bit apart, could be 32 or 64 nowadays */
@@ -662,6 +657,7 @@ static int sh_mobile_sdhi_probe(struct platform_device *pdev)
 	if (ret < 0)
 		goto efree;
 
+	/* Enable tuning iff we have an SCC and a supported mode */
 	if (of_data && of_data->scc_offset && host->mmc->caps & MMC_CAP_UHS_SDR104) {
 		const struct sh_mobile_sdhi_scc *taps = of_data->taps;
 		bool hit = false;
@@ -681,6 +677,11 @@ static int sh_mobile_sdhi_probe(struct platform_device *pdev)
 			dev_warn(&host->pdev->dev, "Unknown clock rate for SDR104\n");
 
 		priv->scc_ctl = host->ctl + of_data->scc_offset;
+		host->init_tuning = sh_mobile_sdhi_init_tuning;
+		host->prepare_tuning = sh_mobile_sdhi_prepare_tuning;
+		host->select_tuning = sh_mobile_sdhi_select_tuning;
+		host->check_scc_error = sh_mobile_sdhi_check_scc_error;
+		host->hw_reset = sh_mobile_sdhi_hw_reset;
 	}
 
 	i = 0;
-- 
2.7.4

[cip-dev] [PATCH 4.4.y-cip 50/83] mmc: sh_mobile_sdhi: remove superfluous check in SCC error check

[Biju Das]

From: Wolfram Sang <wsa+renesas@sang-engineering.com>

commit 03c5b0d90300fc725fc1fb644872b522483a2d7e upstream.

The function will only be available if SDR104 was detected in probe,
so no need to check in the function itself again.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Biju Das <biju.das@bp.renesas.com>
---
 drivers/mmc/host/sh_mobile_sdhi.c | 7 +------
 1 file changed, 1 insertion(+), 6 deletions(-)

diff --git a/drivers/mmc/host/sh_mobile_sdhi.c b/drivers/mmc/host/sh_mobile_sdhi.c
index 30956c7..59cc513 100644
--- a/drivers/mmc/host/sh_mobile_sdhi.c
+++ b/drivers/mmc/host/sh_mobile_sdhi.c
@@ -444,12 +444,7 @@ static int sh_mobile_sdhi_select_tuning(struct tmio_mmc_host *host)
 
 static bool sh_mobile_sdhi_check_scc_error(struct tmio_mmc_host *host)
 {
-	struct sh_mobile_sdhi *priv;
-
-	if (!(host->mmc->caps & MMC_CAP_UHS_SDR104))
-		return 0;
-
-	priv = host_to_priv(host);
+	struct sh_mobile_sdhi *priv = host_to_priv(host);
 
 	/* Check SCC error */
 	if (sd_scc_read32(host, priv, SH_MOBILE_SDHI_SCC_RVSCNTL) &
-- 
2.7.4

[cip-dev] [PATCH 4.4.y-cip 51/83] mmc: sh_mobile_sdhi: remove superfluous check in init_tuning

[Biju Das]

From: Wolfram Sang <wsa+renesas@sang-engineering.com>

commit 7f9096f1c89ea698c22fde91285de2ef3eabd614 upstream.

The function will only be available if SDR104 was detected in probe,
so no need to check in the function itself again.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Biju Das <biju.das@bp.renesas.com>
---
 drivers/mmc/host/sh_mobile_sdhi.c | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/drivers/mmc/host/sh_mobile_sdhi.c b/drivers/mmc/host/sh_mobile_sdhi.c
index 59cc513..d851535 100644
--- a/drivers/mmc/host/sh_mobile_sdhi.c
+++ b/drivers/mmc/host/sh_mobile_sdhi.c
@@ -335,9 +335,6 @@ static unsigned int sh_mobile_sdhi_init_tuning(struct tmio_mmc_host *host)
 {
 	struct sh_mobile_sdhi *priv;
 
-	if (!(host->mmc->caps & MMC_CAP_UHS_SDR104))
-		return 0;
-
 	priv = host_to_priv(host);
 
 	/* set sampling clock selection range */
-- 
2.7.4

[cip-dev] [PATCH 4.4.y-cip 52/83] mmc: sh_mobile_sdhi: enable HS200

[Biju Das]

From: Wolfram Sang <wsa+renesas@sang-engineering.com>

commit b1c95170f97ef19ff63a6da1eb2c70899186aecc upstream.

Setup tuning when the board is HS200 enabled.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Biju Das <biju.das@bp.renesas.com>
---
 drivers/mmc/host/sh_mobile_sdhi.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/mmc/host/sh_mobile_sdhi.c b/drivers/mmc/host/sh_mobile_sdhi.c
index d851535..8e90670 100644
--- a/drivers/mmc/host/sh_mobile_sdhi.c
+++ b/drivers/mmc/host/sh_mobile_sdhi.c
@@ -650,7 +650,9 @@ static int sh_mobile_sdhi_probe(struct platform_device *pdev)
 		goto efree;
 
 	/* Enable tuning iff we have an SCC and a supported mode */
-	if (of_data && of_data->scc_offset && host->mmc->caps & MMC_CAP_UHS_SDR104) {
+	if (of_data && of_data->scc_offset &&
+	    (host->mmc->caps & MMC_CAP_UHS_SDR104 ||
+	     host->mmc->caps2 & MMC_CAP2_HS200_1_8V_SDR)) {
 		const struct sh_mobile_sdhi_scc *taps = of_data->taps;
 		bool hit = false;
 
-- 
2.7.4

[cip-dev] [PATCH 4.4.y-cip 53/83] mmc: host: tmio: drop superfluous exit path

[Biju Das]

From: Wolfram Sang <wsa+renesas@sang-engineering.com>

commit ad7014b3949b6c2b6ce46a546d6d204b5643e621 upstream.

The probe exit path on error does nothing since commit 94b110aff8679b
("mmc: tmio: add tmio_mmc_host_alloc/free()"), so we can bail out
immediately.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Simon Horman <horms+renesas@verge.net.au>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Biju Das <biju.das@bp.renesas.com>
---
 drivers/mmc/host/tmio_mmc_pio.c | 20 ++++++--------------
 1 file changed, 6 insertions(+), 14 deletions(-)

diff --git a/drivers/mmc/host/tmio_mmc_pio.c b/drivers/mmc/host/tmio_mmc_pio.c
index 87f7aa7..4e38fcc 100644
--- a/drivers/mmc/host/tmio_mmc_pio.c
+++ b/drivers/mmc/host/tmio_mmc_pio.c
@@ -1146,7 +1146,7 @@ int tmio_mmc_host_probe(struct tmio_mmc_host *_host,
 
 	ret = mmc_of_parse(mmc);
 	if (ret < 0)
-		goto host_free;
+		return ret;
 
 	_host->pdata = pdata;
 	platform_set_drvdata(pdev, mmc);
@@ -1156,14 +1156,12 @@ int tmio_mmc_host_probe(struct tmio_mmc_host *_host,
 
 	ret = tmio_mmc_init_ocr(_host);
 	if (ret < 0)
-		goto host_free;
+		return ret;
 
 	_host->ctl = devm_ioremap(&pdev->dev,
 				  res_ctl->start, resource_size(res_ctl));
-	if (!_host->ctl) {
-		ret = -ENOMEM;
-		goto host_free;
-	}
+	if (!_host->ctl)
+		return -ENOMEM;
 
 	tmio_mmc_ops.card_busy = _host->card_busy;
 	tmio_mmc_ops.start_signal_voltage_switch = _host->start_signal_voltage_switch;
@@ -1201,10 +1199,8 @@ int tmio_mmc_host_probe(struct tmio_mmc_host *_host,
 	 * Check the sanity of mmc->f_min to prevent tmio_mmc_set_clock() from
 	 * looping forever...
 	 */
-	if (mmc->f_min == 0) {
-		ret = -EINVAL;
-		goto host_free;
-	}
+	if (mmc->f_min == 0)
+		return -EINVAL;
 
 	/*
 	 * While using internal tmio hardware logic for card detection, we need
@@ -1269,10 +1265,6 @@ int tmio_mmc_host_probe(struct tmio_mmc_host *_host,
 	}
 
 	return 0;
-
-host_free:
-
-	return ret;
 }
 EXPORT_SYMBOL(tmio_mmc_host_probe);
 
-- 
2.7.4

[cip-dev] [PATCH 4.4.y-cip 54/83] mmc: tmio: Remove redundant check of mmc->slot.cd_irq

[Biju Das]

From: Ulf Hansson <ulf.hansson@linaro.org>

commit efd7be7bfc8eb8942ba3dc319f323cfd0eda99e2 upstream.

To validate whether native hotplug needs to be used, the tmio driver checks
whether the mmc->slot.cd_irq has been successfully assigned.

This check is redundant at its current place in tmio_mmc_host_probe(), as
the mmc core assigns mmc->slot.cd_irq a valid value first when
mmc_gpiod_request_cd_irq() is called. Therefore, let's just remove the
check for now, as that also removes a layering violation of the tmio driver
accessing core specific data via ->slot.cd_irq.

Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Biju Das <biju.das@bp.renesas.com>
---
 drivers/mmc/host/tmio_mmc_pio.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/mmc/host/tmio_mmc_pio.c b/drivers/mmc/host/tmio_mmc_pio.c
index 4e38fcc..0f766f4 100644
--- a/drivers/mmc/host/tmio_mmc_pio.c
+++ b/drivers/mmc/host/tmio_mmc_pio.c
@@ -1178,8 +1178,7 @@ int tmio_mmc_host_probe(struct tmio_mmc_host *_host,
 
 	_host->native_hotplug = !(pdata->flags & TMIO_MMC_USE_GPIO_CD ||
 				  mmc->caps & MMC_CAP_NEEDS_POLL ||
-				  mmc->caps & MMC_CAP_NONREMOVABLE ||
-				  mmc->slot.cd_irq >= 0);
+				  !mmc_card_is_removable(mmc));
 
 	/*
 	 * On Gen2+, eMMC with NONREMOVABLE currently fails because native
-- 
2.7.4

[cip-dev] [PATCH 4.4.y-cip 55/83] mmc: host: tmio: disable clocks when unbinding

[Biju Das]

From: Wolfram Sang <wsa+renesas@sang-engineering.com>

commit dfcba5ffca989749d1fc49d5b82a2d007b1295b7 upstream.

Create a helper function to disable clocks and use it in remove(), too.
Now, clk_summary in debugfs reports the clocks as disabled and
unprepared after unbinding.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Biju Das <biju.das@bp.renesas.com>
---
 drivers/mmc/host/tmio_mmc_pio.c | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/drivers/mmc/host/tmio_mmc_pio.c b/drivers/mmc/host/tmio_mmc_pio.c
index 0f766f4..9fe6d65 100644
--- a/drivers/mmc/host/tmio_mmc_pio.c
+++ b/drivers/mmc/host/tmio_mmc_pio.c
@@ -903,6 +903,12 @@ static int tmio_mmc_clk_enable(struct tmio_mmc_host *host)
 	return host->clk_enable(host);
 }
 
+static void tmio_mmc_clk_disable(struct tmio_mmc_host *host)
+{
+	if (host->clk_disable)
+		host->clk_disable(host);
+}
+
 static void tmio_mmc_power_on(struct tmio_mmc_host *host, unsigned short vdd)
 {
 	struct mmc_host *mmc = host->mmc;
@@ -1287,6 +1293,8 @@ void tmio_mmc_host_remove(struct tmio_mmc_host *host)
 
 	pm_runtime_put_sync(&pdev->dev);
 	pm_runtime_disable(&pdev->dev);
+
+	tmio_mmc_clk_disable(host);
 }
 EXPORT_SYMBOL(tmio_mmc_host_remove);
 
@@ -1301,8 +1309,7 @@ int tmio_mmc_host_runtime_suspend(struct device *dev)
 	if (host->clk_cache)
 		tmio_mmc_clk_stop(host);
 
-	if (host->clk_disable)
-		host->clk_disable(host);
+	tmio_mmc_clk_disable(host);
 
 	return 0;
 }
-- 
2.7.4

[cip-dev] [PATCH 4.4.y-cip 56/83] mmc: host: tmio: refactor calls to sdio irq

[Biju Das]

From: Wolfram Sang <wsa+renesas@sang-engineering.com>

commit e4f38eb18aedd098b3019e82df07f583a5cbcc58 upstream.

tmio_mmc_sdio_irq() is not used as a seperate irq handler anymore, so we
can make it similar to the other irq helper functions, namely:

* only give the host as argument function which is what it really needs
* prefix function name with __

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Acked-by: Simon Horman <horms+renesas@verge.net.au>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Biju Das <biju.das@bp.renesas.com>
---
 drivers/mmc/host/tmio_mmc_pio.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/mmc/host/tmio_mmc_pio.c b/drivers/mmc/host/tmio_mmc_pio.c
index 9fe6d65..0a3f411 100644
--- a/drivers/mmc/host/tmio_mmc_pio.c
+++ b/drivers/mmc/host/tmio_mmc_pio.c
@@ -709,7 +709,7 @@ static bool __tmio_mmc_sdcard_irq(struct tmio_mmc_host *host,
 	return false;
 }
 
-static bool tmio_mmc_sdio_irq(int irq, void *devid)
+static bool __tmio_mmc_sdio_irq(int irq, void *devid)
 {
 	struct tmio_mmc_host *host = devid;
 	struct mmc_host *mmc = host->mmc;
@@ -754,7 +754,7 @@ irqreturn_t tmio_mmc_irq(int irq, void *devid)
 	if (__tmio_mmc_sdcard_irq(host, ireg, status))
 		return IRQ_HANDLED;
 
-	if (tmio_mmc_sdio_irq(irq, devid))
+	if (__tmio_mmc_sdio_irq(irq, devid))
 		return IRQ_HANDLED;
 
 	return IRQ_NONE;
-- 
2.7.4

[cip-dev] [PATCH 4.4.y-cip 57/83] mmc: host: tmio: SDIO_STATUS_QUIRK is rather SDIO_STATUS_SETBITS

[Biju Das]

From: Wolfram Sang <wsa+renesas@sang-engineering.com>

commit 20dd03734cac41a0545dd24f5e81d8ff0c80874b upstream.

QUIRK sounds like there is something wrong, but actually there are just
some bits which need to be 1. Rename it to be more clear.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Biju Das <biju.das@bp.renesas.com>
---
 drivers/mmc/host/sh_mobile_sdhi.c | 6 ++----
 drivers/mmc/host/tmio_mmc_pio.c   | 2 +-
 include/linux/mfd/tmio.h          | 6 ++----
 3 files changed, 5 insertions(+), 9 deletions(-)

diff --git a/drivers/mmc/host/sh_mobile_sdhi.c b/drivers/mmc/host/sh_mobile_sdhi.c
index 8e90670..a723550 100644
--- a/drivers/mmc/host/sh_mobile_sdhi.c
+++ b/drivers/mmc/host/sh_mobile_sdhi.c
@@ -640,10 +640,8 @@ static int sh_mobile_sdhi_probe(struct platform_device *pdev)
 	 */
 	mmc_data->flags |= TMIO_MMC_HAVE_CMD12_CTRL;
 
-	/*
-	 * All SDHI need SDIO_INFO1 reserved bit
-	 */
-	mmc_data->flags |= TMIO_MMC_SDIO_STATUS_QUIRK;
+	/* All SDHI have SDIO status bits which must be 1 */
+	mmc_data->flags |= TMIO_MMC_SDIO_STATUS_SETBITS;
 
 	ret = tmio_mmc_host_probe(host, mmc_data);
 	if (ret < 0)
diff --git a/drivers/mmc/host/tmio_mmc_pio.c b/drivers/mmc/host/tmio_mmc_pio.c
index 0a3f411..a0b5db3 100644
--- a/drivers/mmc/host/tmio_mmc_pio.c
+++ b/drivers/mmc/host/tmio_mmc_pio.c
@@ -724,7 +724,7 @@ static bool __tmio_mmc_sdio_irq(int irq, void *devid)
 	ireg = status & TMIO_SDIO_MASK_ALL & ~host->sdio_irq_mask;
 
 	sdio_status = status & ~TMIO_SDIO_MASK_ALL;
-	if (pdata->flags & TMIO_MMC_SDIO_STATUS_QUIRK)
+	if (pdata->flags & TMIO_MMC_SDIO_STATUS_SETBITS)
 		sdio_status |= 6;
 
 	sd_ctrl_write16(host, CTL_SDIO_STATUS, sdio_status);
diff --git a/include/linux/mfd/tmio.h b/include/linux/mfd/tmio.h
index fba44ab..a1520d8 100644
--- a/include/linux/mfd/tmio.h
+++ b/include/linux/mfd/tmio.h
@@ -94,10 +94,8 @@
  */
 #define TMIO_MMC_HAVE_CMD12_CTRL	(1 << 7)
 
-/*
- * Some controllers needs to set 1 on SDIO status reserved bits
- */
-#define TMIO_MMC_SDIO_STATUS_QUIRK	(1 << 8)
+/* Controller has some SDIO status bits which must be 1 */
+#define TMIO_MMC_SDIO_STATUS_SETBITS	(1 << 8)
 
 /*
  * Some controllers have a 32-bit wide data port register
-- 
2.7.4

[cip-dev] [PATCH 4.4.y-cip 58/83] mmc: tmio: discard obsolete SDIO irqs before enabling irqs

[Biju Das]

From: Wolfram Sang <wsa+renesas@sang-engineering.com>

commit ee28981535f4261ed5d127ddf4d1a3f8778f520d upstream.

Before enabling SDIO irqs, clear the status bit, so we discard old and
stale interrupts. Needed to get two wireless cards working. Use the
newly introduced macro in all places.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Biju Das <biju.das@bp.renesas.com>
---
 drivers/mmc/host/tmio_mmc.h     |  2 ++
 drivers/mmc/host/tmio_mmc_pio.c | 13 +++++++++++--
 2 files changed, 13 insertions(+), 2 deletions(-)

diff --git a/drivers/mmc/host/tmio_mmc.h b/drivers/mmc/host/tmio_mmc.h
index ba2838c..e414670 100644
--- a/drivers/mmc/host/tmio_mmc.h
+++ b/drivers/mmc/host/tmio_mmc.h
@@ -90,6 +90,8 @@
 #define TMIO_SDIO_STAT_EXWT	0x8000
 #define TMIO_SDIO_MASK_ALL	0xc007
 
+#define TMIO_SDIO_SETBITS_MASK	0x0006
+
 /* Define some IRQ masks */
 /* This is the mask used at reset by the chip */
 #define TMIO_MASK_ALL           0x837f031d
diff --git a/drivers/mmc/host/tmio_mmc_pio.c b/drivers/mmc/host/tmio_mmc_pio.c
index a0b5db3..a152999 100644
--- a/drivers/mmc/host/tmio_mmc_pio.c
+++ b/drivers/mmc/host/tmio_mmc_pio.c
@@ -134,12 +134,21 @@ static void tmio_mmc_enable_sdio_irq(struct mmc_host *mmc, int enable)
 	struct tmio_mmc_host *host = mmc_priv(mmc);
 
 	if (enable && !host->sdio_irq_enabled) {
+		u16 sdio_status;
+
 		/* Keep device active while SDIO irq is enabled */
 		pm_runtime_get_sync(mmc_dev(mmc));
-		host->sdio_irq_enabled = true;
 
+		host->sdio_irq_enabled = true;
 		host->sdio_irq_mask = TMIO_SDIO_MASK_ALL &
 					~TMIO_SDIO_STAT_IOIRQ;
+
+		/* Clear obsolete interrupts before enabling */
+		sdio_status = sd_ctrl_read16(host, CTL_SDIO_STATUS) & ~TMIO_SDIO_MASK_ALL;
+		if (host->pdata->flags & TMIO_MMC_SDIO_STATUS_SETBITS)
+			sdio_status |= TMIO_SDIO_SETBITS_MASK;
+		sd_ctrl_write16(host, CTL_SDIO_STATUS, sdio_status);
+
 		sd_ctrl_write16(host, CTL_SDIO_IRQ_MASK, host->sdio_irq_mask);
 	} else if (!enable && host->sdio_irq_enabled) {
 		host->sdio_irq_mask = TMIO_SDIO_MASK_ALL;
@@ -725,7 +734,7 @@ static bool __tmio_mmc_sdio_irq(int irq, void *devid)
 
 	sdio_status = status & ~TMIO_SDIO_MASK_ALL;
 	if (pdata->flags & TMIO_MMC_SDIO_STATUS_SETBITS)
-		sdio_status |= 6;
+		sdio_status |= TMIO_SDIO_SETBITS_MASK;
 
 	sd_ctrl_write16(host, CTL_SDIO_STATUS, sdio_status);
 
-- 
2.7.4

[cip-dev] [PATCH 4.4.y-cip 59/83] mmc: tmio: ensure end of DMA and SD access are in sync

[Biju Das]

From: Wolfram Sang <wsa+renesas@sang-engineering.com>

commit 52ad9a8e854ca13151f4af8140297f73d49e318a upstream.

The current code assumes that DMA is finished before SD access end is
flagged. Thus, it schedules the 'dma_complete' tasklet in the SD card
interrupt routine when DATAEND is set. The assumption is not safe,
though. Even by mounting an SD card, it can be seen that sometimes DMA
complete is first, sometimes DATAEND. It seems they are usually close
enough timewise to not cause problems. However, a customer reported that
with CMD53 sometimes things really break apart. As a result, the BSP has
a patch which introduces flags for both events and makes sure both flags
are set before scheduling the tasklet. The customer accepted the patch,
yet it doesn't seem a proper upstream solution to me.

This patch refactors the code to replace the tasklet with already
existing and more lightweight mechanisms. First of all, we set the
callback in a DMA descriptor to automatically get notified when DMA is
done. In the callback, we then use a completion to make sure the SD
access has already ended. Then, we proceed as before.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Biju Das <biju.das@bp.renesas.com>
---
 drivers/mmc/host/tmio_mmc.h     |  2 +-
 drivers/mmc/host/tmio_mmc_dma.c | 58 ++++++++++++++++++++++++-----------------
 drivers/mmc/host/tmio_mmc_pio.c |  4 +--
 3 files changed, 37 insertions(+), 27 deletions(-)

diff --git a/drivers/mmc/host/tmio_mmc.h b/drivers/mmc/host/tmio_mmc.h
index e414670..f864be46 100644
--- a/drivers/mmc/host/tmio_mmc.h
+++ b/drivers/mmc/host/tmio_mmc.h
@@ -136,7 +136,7 @@ struct tmio_mmc_host {
 	bool			force_pio;
 	struct dma_chan		*chan_rx;
 	struct dma_chan		*chan_tx;
-	struct tasklet_struct	dma_complete;
+	struct completion	dma_dataend;
 	struct tasklet_struct	dma_issue;
 	struct scatterlist	bounce_sg;
 	u8			*bounce_buf;
diff --git a/drivers/mmc/host/tmio_mmc_dma.c b/drivers/mmc/host/tmio_mmc_dma.c
index d157368..cef1eb4 100644
--- a/drivers/mmc/host/tmio_mmc_dma.c
+++ b/drivers/mmc/host/tmio_mmc_dma.c
@@ -43,6 +43,31 @@ void tmio_mmc_abort_dma(struct tmio_mmc_host *host)
 	tmio_mmc_enable_dma(host, true);
 }
 
+static void tmio_mmc_dma_callback(void *arg)
+{
+	struct tmio_mmc_host *host = arg;
+
+	wait_for_completion(&host->dma_dataend);
+
+	spin_lock_irq(&host->lock);
+
+	if (!host->data)
+		goto out;
+
+	if (host->data->flags & MMC_DATA_READ)
+		dma_unmap_sg(host->chan_rx->device->dev,
+			     host->sg_ptr, host->sg_len,
+			     DMA_FROM_DEVICE);
+	else
+		dma_unmap_sg(host->chan_tx->device->dev,
+			     host->sg_ptr, host->sg_len,
+			     DMA_TO_DEVICE);
+
+	tmio_mmc_do_data_irq(host);
+out:
+	spin_unlock_irq(&host->lock);
+}
+
 static void tmio_mmc_start_dma_rx(struct tmio_mmc_host *host)
 {
 	struct scatterlist *sg = host->sg_ptr, *sg_tmp;
@@ -88,6 +113,10 @@ static void tmio_mmc_start_dma_rx(struct tmio_mmc_host *host)
 			DMA_DEV_TO_MEM, DMA_CTRL_ACK);
 
 	if (desc) {
+		reinit_completion(&host->dma_dataend);
+		desc->callback = tmio_mmc_dma_callback;
+		desc->callback_param = host;
+
 		cookie = dmaengine_submit(desc);
 		if (cookie < 0) {
 			desc = NULL;
@@ -162,6 +191,10 @@ static void tmio_mmc_start_dma_tx(struct tmio_mmc_host *host)
 			DMA_MEM_TO_DEV, DMA_CTRL_ACK);
 
 	if (desc) {
+		reinit_completion(&host->dma_dataend);
+		desc->callback = tmio_mmc_dma_callback;
+		desc->callback_param = host;
+
 		cookie = dmaengine_submit(desc);
 		if (cookie < 0) {
 			desc = NULL;
@@ -221,29 +254,6 @@ static void tmio_mmc_issue_tasklet_fn(unsigned long priv)
 		dma_async_issue_pending(chan);
 }
 
-static void tmio_mmc_tasklet_fn(unsigned long arg)
-{
-	struct tmio_mmc_host *host = (struct tmio_mmc_host *)arg;
-
-	spin_lock_irq(&host->lock);
-
-	if (!host->data)
-		goto out;
-
-	if (host->data->flags & MMC_DATA_READ)
-		dma_unmap_sg(host->chan_rx->device->dev,
-			     host->sg_ptr, host->sg_len,
-			     DMA_FROM_DEVICE);
-	else
-		dma_unmap_sg(host->chan_tx->device->dev,
-			     host->sg_ptr, host->sg_len,
-			     DMA_TO_DEVICE);
-
-	tmio_mmc_do_data_irq(host);
-out:
-	spin_unlock_irq(&host->lock);
-}
-
 void tmio_mmc_request_dma(struct tmio_mmc_host *host, struct tmio_mmc_data *pdata)
 {
 	/* We can only either use DMA for both Tx and Rx or not use it at all */
@@ -306,7 +316,7 @@ void tmio_mmc_request_dma(struct tmio_mmc_host *host, struct tmio_mmc_data *pdat
 		if (!host->bounce_buf)
 			goto ebouncebuf;
 
-		tasklet_init(&host->dma_complete, tmio_mmc_tasklet_fn, (unsigned long)host);
+		init_completion(&host->dma_dataend);
 		tasklet_init(&host->dma_issue, tmio_mmc_issue_tasklet_fn, (unsigned long)host);
 	}
 
diff --git a/drivers/mmc/host/tmio_mmc_pio.c b/drivers/mmc/host/tmio_mmc_pio.c
index a152999..2fecd22 100644
--- a/drivers/mmc/host/tmio_mmc_pio.c
+++ b/drivers/mmc/host/tmio_mmc_pio.c
@@ -596,11 +596,11 @@ static void tmio_mmc_data_irq(struct tmio_mmc_host *host, unsigned int stat)
 
 		if (done) {
 			tmio_mmc_disable_mmc_irqs(host, TMIO_STAT_DATAEND);
-			tasklet_schedule(&host->dma_complete);
+			complete(&host->dma_dataend);
 		}
 	} else if (host->chan_rx && (data->flags & MMC_DATA_READ) && !host->force_pio) {
 		tmio_mmc_disable_mmc_irqs(host, TMIO_STAT_DATAEND);
-		tasklet_schedule(&host->dma_complete);
+		complete(&host->dma_dataend);
 	} else {
 		tmio_mmc_do_data_irq(host);
 		tmio_mmc_disable_mmc_irqs(host, TMIO_MASK_READOP | TMIO_MASK_WRITEOP);
-- 
2.7.4

[cip-dev] [PATCH 4.4.y-cip 60/83] mmc: host: tmio: use defines for CTL_STOP_INTERNAL_ACTION values

[Biju Das]

From: Wolfram Sang <wsa+renesas@sang-engineering.com>

commit 9afcbf4a6f1995f3b47088764eaef7b56154beb9 upstream.

Reviewed-by: Simon Horman <horms+renesas@verge.net.au>
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Biju Das <biju.das@bp.renesas.com>
---
 drivers/mmc/host/tmio_mmc.h     | 4 ++++
 drivers/mmc/host/tmio_mmc_pio.c | 6 +++---
 2 files changed, 7 insertions(+), 3 deletions(-)

diff --git a/drivers/mmc/host/tmio_mmc.h b/drivers/mmc/host/tmio_mmc.h
index f864be46..3164e7c 100644
--- a/drivers/mmc/host/tmio_mmc.h
+++ b/drivers/mmc/host/tmio_mmc.h
@@ -49,6 +49,10 @@
 #define CTL_CLK_AND_WAIT_CTL 0x138
 #define CTL_RESET_SDIO 0x1e0
 
+/* Definitions for values the CTL_STOP_INTERNAL_ACTION register can take */
+#define TMIO_STOP_STP		BIT(0)
+#define TMIO_STOP_SEC		BIT(8)
+
 /* Definitions for values the CTRL_STATUS register can take. */
 #define TMIO_STAT_CMDRESPEND    BIT(0)
 #define TMIO_STAT_DATAEND       BIT(2)
diff --git a/drivers/mmc/host/tmio_mmc_pio.c b/drivers/mmc/host/tmio_mmc_pio.c
index 2fecd22..477cac8 100644
--- a/drivers/mmc/host/tmio_mmc_pio.c
+++ b/drivers/mmc/host/tmio_mmc_pio.c
@@ -340,7 +340,7 @@ static int tmio_mmc_start_command(struct tmio_mmc_host *host, struct mmc_command
 
 	/* CMD12 is handled by hardware */
 	if (cmd->opcode == MMC_STOP_TRANSMISSION && !cmd->arg) {
-		sd_ctrl_write16(host, CTL_STOP_INTERNAL_ACTION, 0x001);
+		sd_ctrl_write16(host, CTL_STOP_INTERNAL_ACTION, TMIO_STOP_STP);
 		return 0;
 	}
 
@@ -367,7 +367,7 @@ static int tmio_mmc_start_command(struct tmio_mmc_host *host, struct mmc_command
 	if (data) {
 		c |= DATA_PRESENT;
 		if (data->blocks > 1) {
-			sd_ctrl_write16(host, CTL_STOP_INTERNAL_ACTION, 0x100);
+			sd_ctrl_write16(host, CTL_STOP_INTERNAL_ACTION, TMIO_STOP_SEC);
 			c |= TRANSFER_MULTI;
 
 			/*
@@ -554,7 +554,7 @@ void tmio_mmc_do_data_irq(struct tmio_mmc_host *host)
 
 	if (stop) {
 		if (stop->opcode == MMC_STOP_TRANSMISSION && !stop->arg)
-			sd_ctrl_write16(host, CTL_STOP_INTERNAL_ACTION, 0x000);
+			sd_ctrl_write16(host, CTL_STOP_INTERNAL_ACTION, 0);
 		else
 			BUG();
 	}
-- 
2.7.4

[cip-dev] [PATCH 4.4.y-cip 61/83] mmc: host: tmio: don't BUG on unsupported stop commands

[Biju Das]

From: Wolfram Sang <wsa+renesas@sang-engineering.com>

commit 022f731e03d190d0e4f52f2b1bd90fae0eadd56d upstream.

Halting the kernel on an unsupported stop command seems overkill, report
the error and say what we already did (due to autocmd12) instead.

Reviewed-by: Simon Horman <horms+renesas@verge.net.au>
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Biju Das <biju.das@bp.renesas.com>
---
 drivers/mmc/host/tmio_mmc_pio.c | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/drivers/mmc/host/tmio_mmc_pio.c b/drivers/mmc/host/tmio_mmc_pio.c
index 477cac8..9d59b52 100644
--- a/drivers/mmc/host/tmio_mmc_pio.c
+++ b/drivers/mmc/host/tmio_mmc_pio.c
@@ -553,10 +553,11 @@ void tmio_mmc_do_data_irq(struct tmio_mmc_host *host)
 	}
 
 	if (stop) {
-		if (stop->opcode == MMC_STOP_TRANSMISSION && !stop->arg)
-			sd_ctrl_write16(host, CTL_STOP_INTERNAL_ACTION, 0);
-		else
-			BUG();
+		if (stop->opcode != MMC_STOP_TRANSMISSION || stop->arg)
+			dev_err(&host->pdev->dev, "unsupported stop: CMD%u,0x%x. We did CMD12,0\n",
+				stop->opcode, stop->arg);
+
+		sd_ctrl_write16(host, CTL_STOP_INTERNAL_ACTION, 0);
 	}
 
 	schedule_work(&host->done);
-- 
2.7.4

[cip-dev] [PATCH 4.4.y-cip 62/83] mmc: host: tmio: fill in response from auto cmd12

[Biju Das]

From: Wolfram Sang <wsa+renesas@sang-engineering.com>

commit eb7c00e1461124ad0e85f1a9a3954d7164809c13 upstream.

After we received the dataend interrupt, R1 response register carries
the value from the automatically generated stop command. Report that
info back to the MMC block layer, so we will be notified in case of e.g.
ECC errors which happened during the last transfer.

Reviewed-by: Simon Horman <horms+renesas@verge.net.au>
Tested-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Biju Das <biju.das@bp.renesas.com>
---
 drivers/mmc/host/tmio_mmc_pio.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/mmc/host/tmio_mmc_pio.c b/drivers/mmc/host/tmio_mmc_pio.c
index 9d59b52..35dbeb5 100644
--- a/drivers/mmc/host/tmio_mmc_pio.c
+++ b/drivers/mmc/host/tmio_mmc_pio.c
@@ -557,6 +557,9 @@ void tmio_mmc_do_data_irq(struct tmio_mmc_host *host)
 			dev_err(&host->pdev->dev, "unsupported stop: CMD%u,0x%x. We did CMD12,0\n",
 				stop->opcode, stop->arg);
 
+		/* fill in response from auto CMD12 */
+		stop->resp[0] = sd_ctrl_read16_and_16_as_32(host, CTL_RESPONSE);
+
 		sd_ctrl_write16(host, CTL_STOP_INTERNAL_ACTION, 0);
 	}
 
-- 
2.7.4

[cip-dev] [PATCH 4.4.y-cip 63/83] mmc: tmio: always get number of taps

[Biju Das]

From: Masaharu Hayakawa <masaharu.hayakawa.ry@renesas.com>

commit 43b0b361b0170030603cf76f70b099f3323edcf3 upstream.

Current code gets number of taps only once and keeps the value. This is
not correct, we need to obtain it every time before executing tuning,
so remove the outer if-block.

Signed-off-by: Masaharu Hayakawa <masaharu.hayakawa.ry@renesas.com>
[wsa: extracted from a larger patch and reworded commit message]
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Simon Horman <horms+renesas@verge.net.au>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

Signed-off-by: Biju Das <biju.das@bp.renesas.com>
---
 drivers/mmc/host/tmio_mmc_pio.c | 16 +++++++---------
 1 file changed, 7 insertions(+), 9 deletions(-)

diff --git a/drivers/mmc/host/tmio_mmc_pio.c b/drivers/mmc/host/tmio_mmc_pio.c
index 35dbeb5..4764f96 100644
--- a/drivers/mmc/host/tmio_mmc_pio.c
+++ b/drivers/mmc/host/tmio_mmc_pio.c
@@ -819,16 +819,14 @@ static int tmio_mmc_execute_tuning(struct mmc_host *mmc, u32 opcode)
 	struct tmio_mmc_host *host = mmc_priv(mmc);
 	int i, ret = 0;
 
-	if (!host->tap_num) {
-		if (!host->init_tuning || !host->select_tuning)
-			/* Tuning is not supported */
-			goto out;
+	if (!host->init_tuning || !host->select_tuning)
+		/* Tuning is not supported */
+		goto out;
 
-		host->tap_num = host->init_tuning(host);
-		if (!host->tap_num)
-			/* Tuning is not supported */
-			goto out;
-	}
+	host->tap_num = host->init_tuning(host);
+	if (!host->tap_num)
+		/* Tuning is not supported */
+		goto out;
 
 	if (host->tap_num * 2 >= sizeof(host->taps) * BITS_PER_BYTE) {
 		dev_warn_once(&host->pdev->dev,
-- 
2.7.4

[cip-dev] [PATCH 4.4.y-cip 64/83] mmc: tmio: drop filenames from comment at top of source

[Biju Das]

From: Simon Horman <horms+renesas@verge.net.au>

commit b21f13d8f7bf1b65b2e5396fbd8bfb857627b666 upstream.

Reshuffle the comment at the top of the source
dropping filenames and moving up human readable strings.

This seems to be somewhat more useful information to start the
source file with. It is also less fragile, f.e. to file renames.

Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Biju Das <biju.das@bp.renesas.com>
---
 drivers/mmc/host/tmio_mmc.c     | 8 +++-----
 drivers/mmc/host/tmio_mmc.h     | 7 +++----
 drivers/mmc/host/tmio_mmc_dma.c | 4 +---
 drivers/mmc/host/tmio_mmc_pio.c | 8 +++-----
 4 files changed, 10 insertions(+), 17 deletions(-)

diff --git a/drivers/mmc/host/tmio_mmc.c b/drivers/mmc/host/tmio_mmc.c
index e897e7f..ff14311 100644
--- a/drivers/mmc/host/tmio_mmc.c
+++ b/drivers/mmc/host/tmio_mmc.c
@@ -1,5 +1,7 @@
 /*
- * linux/drivers/mmc/host/tmio_mmc.c
+ * Driver for the MMC / SD / SDIO cell found in:
+ *
+ * TC6393XB TC6391XB TC6387XB T7L66XB ASIC3
  *
  * Copyright (C) 2007 Ian Molton
  * Copyright (C) 2004 Ian Molton
@@ -7,10 +9,6 @@
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 2 as
  * published by the Free Software Foundation.
- *
- * Driver for the MMC / SD / SDIO cell found in:
- *
- * TC6393XB TC6391XB TC6387XB T7L66XB ASIC3
  */
 
 #include <linux/device.h>
diff --git a/drivers/mmc/host/tmio_mmc.h b/drivers/mmc/host/tmio_mmc.h
index 3164e7c..d01776e 100644
--- a/drivers/mmc/host/tmio_mmc.h
+++ b/drivers/mmc/host/tmio_mmc.h
@@ -1,5 +1,7 @@
 /*
- * linux/drivers/mmc/host/tmio_mmc.h
+ * Driver for the MMC / SD / SDIO cell found in:
+ *
+ * TC6393XB TC6391XB TC6387XB T7L66XB ASIC3
  *
  * Copyright (C) 2016 Sang Engineering, Wolfram Sang
  * Copyright (C) 2015-16 Renesas Electronics Corporation
@@ -10,9 +12,6 @@
  * it under the terms of the GNU General Public License version 2 as
  * published by the Free Software Foundation.
  *
- * Driver for the MMC / SD / SDIO cell found in:
- *
- * TC6393XB TC6391XB TC6387XB T7L66XB ASIC3
  */
 
 #ifndef TMIO_MMC_H
diff --git a/drivers/mmc/host/tmio_mmc_dma.c b/drivers/mmc/host/tmio_mmc_dma.c
index cef1eb4..f668441 100644
--- a/drivers/mmc/host/tmio_mmc_dma.c
+++ b/drivers/mmc/host/tmio_mmc_dma.c
@@ -1,13 +1,11 @@
 /*
- * linux/drivers/mmc/tmio_mmc_dma.c
+ * DMA function for TMIO MMC implementations
  *
  * Copyright (C) 2010-2011 Guennadi Liakhovetski
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 2 as
  * published by the Free Software Foundation.
- *
- * DMA function for TMIO MMC implementations
  */
 
 #include <linux/device.h>
diff --git a/drivers/mmc/host/tmio_mmc_pio.c b/drivers/mmc/host/tmio_mmc_pio.c
index 4764f96..9b95158 100644
--- a/drivers/mmc/host/tmio_mmc_pio.c
+++ b/drivers/mmc/host/tmio_mmc_pio.c
@@ -1,5 +1,7 @@
 /*
- * linux/drivers/mmc/host/tmio_mmc_pio.c
+ * Driver for the MMC / SD / SDIO IP found in:
+ *
+ * TC6393XB, TC6391XB, TC6387XB, T7L66XB, ASIC3, SH-Mobile SoCs
  *
  * Copyright (C) 2016 Sang Engineering, Wolfram Sang
  * Copyright (C) 2015-16 Renesas Electronics Corporation
@@ -11,10 +13,6 @@
  * it under the terms of the GNU General Public License version 2 as
  * published by the Free Software Foundation.
  *
- * Driver for the MMC / SD / SDIO IP found in:
- *
- * TC6393XB, TC6391XB, TC6387XB, T7L66XB, ASIC3, SH-Mobile SoCs
- *
  * This driver draws mainly on scattered spec sheets, Reverse engineering
  * of the toshiba e800  SD driver and some parts of the 2.4 ASIC3 driver (4 bit
  * support). (Further 4 bit support from a later datasheet).
-- 
2.7.4

[cip-dev] [PATCH 4.4.y-cip 65/83] mmc: renesas-sdhi, tmio: make dma more modular

[Biju Das]

From: Simon Horman <horms+renesas@verge.net.au>

commit 631fa73cfba8dcfd0d1db8eb608527183ed95648 upstream.

Refactor DMA support to allow it to be provided by a set of call-backs
that are provided by a host driver. The motivation is to allow multiple
DMA implementations to be provided and instantiated at run-time.

Instantiate the existing DMA implementation from the sh_mobile_sdhi driver
which appears to match the current use-case. This has the side effect
of moving the DMA code from the tmio_core to the sh_mobile_sdhi driver.

A follow-up patch will change the source file for the SDHI DMA
implementation accordingly. Another follow-up patch will re-organise the
SDHI driver removing the need for tmio_mmc_get_dma_ops().

Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Biju Das <biju.das@bp.renesas.com>
---
 drivers/mmc/host/Makefile         |  3 +--
 drivers/mmc/host/sh_mobile_sdhi.c |  2 +-
 drivers/mmc/host/tmio_mmc.c       |  2 +-
 drivers/mmc/host/tmio_mmc.h       | 55 ++++++++++++++++-----------------------
 drivers/mmc/host/tmio_mmc_dma.c   | 24 +++++++++++++----
 drivers/mmc/host/tmio_mmc_pio.c   | 43 +++++++++++++++++++++++++++++-
 6 files changed, 86 insertions(+), 43 deletions(-)

diff --git a/drivers/mmc/host/Makefile b/drivers/mmc/host/Makefile
index 3595f83..bf399b8 100644
--- a/drivers/mmc/host/Makefile
+++ b/drivers/mmc/host/Makefile
@@ -37,8 +37,7 @@ obj-$(CONFIG_MMC_SDRICOH_CS)	+= sdricoh_cs.o
 obj-$(CONFIG_MMC_TMIO)		+= tmio_mmc.o
 obj-$(CONFIG_MMC_TMIO_CORE)	+= tmio_mmc_core.o
 tmio_mmc_core-y			:= tmio_mmc_pio.o
-tmio_mmc_core-$(subst m,y,$(CONFIG_MMC_SDHI))	+= tmio_mmc_dma.o
-obj-$(CONFIG_MMC_SDHI)		+= sh_mobile_sdhi.o
+obj-$(CONFIG_MMC_SDHI)		+= sh_mobile_sdhi.o tmio_mmc_dma.o
 obj-$(CONFIG_MMC_CB710)		+= cb710-mmc.o
 obj-$(CONFIG_MMC_VIA_SDMMC)	+= via-sdmmc.o
 obj-$(CONFIG_SDH_BFIN)		+= bfin_sdh.o
diff --git a/drivers/mmc/host/sh_mobile_sdhi.c b/drivers/mmc/host/sh_mobile_sdhi.c
index a723550..05edac3 100644
--- a/drivers/mmc/host/sh_mobile_sdhi.c
+++ b/drivers/mmc/host/sh_mobile_sdhi.c
@@ -643,7 +643,7 @@ static int sh_mobile_sdhi_probe(struct platform_device *pdev)
 	/* All SDHI have SDIO status bits which must be 1 */
 	mmc_data->flags |= TMIO_MMC_SDIO_STATUS_SETBITS;
 
-	ret = tmio_mmc_host_probe(host, mmc_data);
+	ret = tmio_mmc_host_probe(host, mmc_data, tmio_mmc_get_dma_ops());
 	if (ret < 0)
 		goto efree;
 
diff --git a/drivers/mmc/host/tmio_mmc.c b/drivers/mmc/host/tmio_mmc.c
index ff14311..5988014 100644
--- a/drivers/mmc/host/tmio_mmc.c
+++ b/drivers/mmc/host/tmio_mmc.c
@@ -97,7 +97,7 @@ static int tmio_mmc_probe(struct platform_device *pdev)
 	/* SD control register space size is 0x200, 0x400 for bus_shift=1 */
 	host->bus_shift = resource_size(res) >> 10;
 
-	ret = tmio_mmc_host_probe(host, pdata);
+	ret = tmio_mmc_host_probe(host, pdata, NULL);
 	if (ret)
 		goto host_free;
 
diff --git a/drivers/mmc/host/tmio_mmc.h b/drivers/mmc/host/tmio_mmc.h
index d01776e..86aa49f3 100644
--- a/drivers/mmc/host/tmio_mmc.h
+++ b/drivers/mmc/host/tmio_mmc.h
@@ -113,6 +113,15 @@ struct tmio_mmc_dma {
 	void (*enable)(struct tmio_mmc_host *host, bool enable);
 };
 
+struct tmio_mmc_dma_ops {
+	void (*start)(struct tmio_mmc_host *host, struct mmc_data *data);
+	void (*enable)(struct tmio_mmc_host *host, bool enable);
+	void (*request)(struct tmio_mmc_host *host,
+			struct tmio_mmc_data *pdata);
+	void (*release)(struct tmio_mmc_host *host);
+	void (*abort)(struct tmio_mmc_host *host);
+};
+
 struct tmio_mmc_host {
 	void __iomem *ctl;
 	struct mmc_command      *cmd;
@@ -187,12 +196,15 @@ struct tmio_mmc_host {
 	/* Tuning values: 1 for success, 0 for failure */
 	DECLARE_BITMAP(taps, BITS_PER_BYTE * sizeof(long));
 	unsigned int tap_num;
+
+	const struct tmio_mmc_dma_ops *dma_ops;
 };
 
 struct tmio_mmc_host *tmio_mmc_host_alloc(struct platform_device *pdev);
 void tmio_mmc_host_free(struct tmio_mmc_host *host);
 int tmio_mmc_host_probe(struct tmio_mmc_host *host,
-			struct tmio_mmc_data *pdata);
+			struct tmio_mmc_data *pdata,
+			const struct tmio_mmc_dma_ops *dma_ops);
 void tmio_mmc_host_remove(struct tmio_mmc_host *host);
 void tmio_mmc_do_data_irq(struct tmio_mmc_host *host);
 
@@ -200,6 +212,15 @@ void tmio_mmc_enable_mmc_irqs(struct tmio_mmc_host *host, u32 i);
 void tmio_mmc_disable_mmc_irqs(struct tmio_mmc_host *host, u32 i);
 irqreturn_t tmio_mmc_irq(int irq, void *devid);
 
+#if IS_ENABLED(CONFIG_MMC_SDHI)
+const struct tmio_mmc_dma_ops *tmio_mmc_get_dma_ops(void);
+#else
+static inline const struct tmio_mmc_dma_ops *tmio_mmc_get_dma_ops(void)
+{
+	return NULL;
+}
+#endif
+
 static inline char *tmio_mmc_kmap_atomic(struct scatterlist *sg,
 					 unsigned long *flags)
 {
@@ -214,38 +235,6 @@ static inline void tmio_mmc_kunmap_atomic(struct scatterlist *sg,
 	local_irq_restore(*flags);
 }
 
-#if defined(CONFIG_MMC_SDHI) || defined(CONFIG_MMC_SDHI_MODULE)
-void tmio_mmc_start_dma(struct tmio_mmc_host *host, struct mmc_data *data);
-void tmio_mmc_enable_dma(struct tmio_mmc_host *host, bool enable);
-void tmio_mmc_request_dma(struct tmio_mmc_host *host, struct tmio_mmc_data *pdata);
-void tmio_mmc_release_dma(struct tmio_mmc_host *host);
-void tmio_mmc_abort_dma(struct tmio_mmc_host *host);
-#else
-static inline void tmio_mmc_start_dma(struct tmio_mmc_host *host,
-			       struct mmc_data *data)
-{
-}
-
-static inline void tmio_mmc_enable_dma(struct tmio_mmc_host *host, bool enable)
-{
-}
-
-static inline void tmio_mmc_request_dma(struct tmio_mmc_host *host,
-				 struct tmio_mmc_data *pdata)
-{
-	host->chan_tx = NULL;
-	host->chan_rx = NULL;
-}
-
-static inline void tmio_mmc_release_dma(struct tmio_mmc_host *host)
-{
-}
-
-static inline void tmio_mmc_abort_dma(struct tmio_mmc_host *host)
-{
-}
-#endif
-
 #ifdef CONFIG_PM
 int tmio_mmc_host_runtime_suspend(struct device *dev);
 int tmio_mmc_host_runtime_resume(struct device *dev);
diff --git a/drivers/mmc/host/tmio_mmc_dma.c b/drivers/mmc/host/tmio_mmc_dma.c
index f668441..e743684 100644
--- a/drivers/mmc/host/tmio_mmc_dma.c
+++ b/drivers/mmc/host/tmio_mmc_dma.c
@@ -20,7 +20,7 @@
 
 #define TMIO_MMC_MIN_DMA_LEN 8
 
-void tmio_mmc_enable_dma(struct tmio_mmc_host *host, bool enable)
+static void tmio_mmc_enable_dma(struct tmio_mmc_host *host, bool enable)
 {
 	if (!host->chan_tx || !host->chan_rx)
 		return;
@@ -29,7 +29,7 @@ void tmio_mmc_enable_dma(struct tmio_mmc_host *host, bool enable)
 		host->dma->enable(host, enable);
 }
 
-void tmio_mmc_abort_dma(struct tmio_mmc_host *host)
+static void tmio_mmc_abort_dma(struct tmio_mmc_host *host)
 {
 	tmio_mmc_enable_dma(host, false);
 
@@ -218,7 +218,7 @@ pio:
 	}
 }
 
-void tmio_mmc_start_dma(struct tmio_mmc_host *host,
+static void tmio_mmc_start_dma(struct tmio_mmc_host *host,
 			       struct mmc_data *data)
 {
 	if (data->flags & MMC_DATA_READ) {
@@ -252,7 +252,8 @@ static void tmio_mmc_issue_tasklet_fn(unsigned long priv)
 		dma_async_issue_pending(chan);
 }
 
-void tmio_mmc_request_dma(struct tmio_mmc_host *host, struct tmio_mmc_data *pdata)
+static void tmio_mmc_request_dma(struct tmio_mmc_host *host,
+				 struct tmio_mmc_data *pdata)
 {
 	/* We can only either use DMA for both Tx and Rx or not use it at all */
 	if (!host->dma || (!host->pdev->dev.of_node &&
@@ -332,7 +333,7 @@ ecfgtx:
 	host->chan_tx = NULL;
 }
 
-void tmio_mmc_release_dma(struct tmio_mmc_host *host)
+static void tmio_mmc_release_dma(struct tmio_mmc_host *host)
 {
 	if (host->chan_tx) {
 		struct dma_chan *chan = host->chan_tx;
@@ -349,3 +350,16 @@ void tmio_mmc_release_dma(struct tmio_mmc_host *host)
 		host->bounce_buf = NULL;
 	}
 }
+
+static const struct tmio_mmc_dma_ops tmio_mmc_dma_ops = {
+	.start = tmio_mmc_start_dma,
+	.enable = tmio_mmc_enable_dma,
+	.request = tmio_mmc_request_dma,
+	.release = tmio_mmc_release_dma,
+	.abort = tmio_mmc_abort_dma,
+};
+
+const struct tmio_mmc_dma_ops *tmio_mmc_get_dma_ops(void)
+{
+	return &tmio_mmc_dma_ops;
+}
diff --git a/drivers/mmc/host/tmio_mmc_pio.c b/drivers/mmc/host/tmio_mmc_pio.c
index 9b95158..8ab58ca 100644
--- a/drivers/mmc/host/tmio_mmc_pio.c
+++ b/drivers/mmc/host/tmio_mmc_pio.c
@@ -50,17 +50,55 @@
 
 #include "tmio_mmc.h"
 
+static inline void tmio_mmc_start_dma(struct tmio_mmc_host *host,
+				      struct mmc_data *data)
+{
+	if (host->dma_ops)
+		host->dma_ops->start(host, data);
+}
+
+static inline void tmio_mmc_enable_dma(struct tmio_mmc_host *host, bool enable)
+{
+	if (host->dma_ops)
+		host->dma_ops->enable(host, enable);
+}
+
+static inline void tmio_mmc_request_dma(struct tmio_mmc_host *host,
+					struct tmio_mmc_data *pdata)
+{
+	if (host->dma_ops) {
+		host->dma_ops->request(host, pdata);
+	} else {
+		host->chan_tx = NULL;
+		host->chan_rx = NULL;
+	}
+}
+
+static inline void tmio_mmc_release_dma(struct tmio_mmc_host *host)
+{
+	if (host->dma_ops)
+		host->dma_ops->release(host);
+}
+
+static inline void tmio_mmc_abort_dma(struct tmio_mmc_host *host)
+{
+	if (host->dma_ops)
+		host->dma_ops->abort(host);
+}
+
 void tmio_mmc_enable_mmc_irqs(struct tmio_mmc_host *host, u32 i)
 {
 	host->sdcard_irq_mask &= ~(i & TMIO_MASK_IRQ);
 	sd_ctrl_write32_as_16_and_16(host, CTL_IRQ_MASK, host->sdcard_irq_mask);
 }
+EXPORT_SYMBOL(tmio_mmc_enable_mmc_irqs);
 
 void tmio_mmc_disable_mmc_irqs(struct tmio_mmc_host *host, u32 i)
 {
 	host->sdcard_irq_mask |= (i & TMIO_MASK_IRQ);
 	sd_ctrl_write32_as_16_and_16(host, CTL_IRQ_MASK, host->sdcard_irq_mask);
 }
+EXPORT_SYMBOL(tmio_mmc_disable_mmc_irqs);
 
 static void tmio_mmc_ack_mmc_irqs(struct tmio_mmc_host *host, u32 i)
 {
@@ -563,6 +601,7 @@ void tmio_mmc_do_data_irq(struct tmio_mmc_host *host)
 
 	schedule_work(&host->done);
 }
+EXPORT_SYMBOL(tmio_mmc_do_data_irq);
 
 static void tmio_mmc_data_irq(struct tmio_mmc_host *host, unsigned int stat)
 {
@@ -1142,7 +1181,8 @@ void tmio_mmc_host_free(struct tmio_mmc_host *host)
 EXPORT_SYMBOL(tmio_mmc_host_free);
 
 int tmio_mmc_host_probe(struct tmio_mmc_host *_host,
-			struct tmio_mmc_data *pdata)
+			struct tmio_mmc_data *pdata,
+			const struct tmio_mmc_dma_ops *dma_ops)
 {
 	struct platform_device *pdev = _host->pdev;
 	struct mmc_host *mmc = _host->mmc;
@@ -1254,6 +1294,7 @@ int tmio_mmc_host_probe(struct tmio_mmc_host *_host,
 	INIT_WORK(&_host->done, tmio_mmc_done_work);
 
 	/* See if we also get DMA */
+	_host->dma_ops = dma_ops;
 	tmio_mmc_request_dma(_host, pdata);
 
 	pm_runtime_set_active(&pdev->dev);
-- 
2.7.4

[cip-dev] [PATCH 4.4.y-cip 66/83] mmc: tmio: rename tmio_mmc_{pio => core}.c

[Biju Das]

From: Simon Horman <horms+renesas@verge.net.au>

commit 426e95d1766bad20e59f219af64fdd50c39bcfee upstream.

Rename tmio_mmc_pio.c to tmio_mmc_core.c to more accurately reflect its
function: to provide core code for the tmio-mmc and sh-mobole-sdhi drivers.

Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Biju Das <biju.das@bp.renesas.com>
---
 drivers/mmc/host/Makefile        |    1 -
 drivers/mmc/host/tmio_mmc_core.c | 1394 ++++++++++++++++++++++++++++++++++++++
 drivers/mmc/host/tmio_mmc_pio.c  | 1394 --------------------------------------
 3 files changed, 1394 insertions(+), 1395 deletions(-)
 create mode 100644 drivers/mmc/host/tmio_mmc_core.c
 delete mode 100644 drivers/mmc/host/tmio_mmc_pio.c

diff --git a/drivers/mmc/host/Makefile b/drivers/mmc/host/Makefile
index bf399b8..2b75a43 100644
--- a/drivers/mmc/host/Makefile
+++ b/drivers/mmc/host/Makefile
@@ -36,7 +36,6 @@ obj-$(CONFIG_MMC_S3C)   	+= s3cmci.o
 obj-$(CONFIG_MMC_SDRICOH_CS)	+= sdricoh_cs.o
 obj-$(CONFIG_MMC_TMIO)		+= tmio_mmc.o
 obj-$(CONFIG_MMC_TMIO_CORE)	+= tmio_mmc_core.o
-tmio_mmc_core-y			:= tmio_mmc_pio.o
 obj-$(CONFIG_MMC_SDHI)		+= sh_mobile_sdhi.o tmio_mmc_dma.o
 obj-$(CONFIG_MMC_CB710)		+= cb710-mmc.o
 obj-$(CONFIG_MMC_VIA_SDMMC)	+= via-sdmmc.o
diff --git a/drivers/mmc/host/tmio_mmc_core.c b/drivers/mmc/host/tmio_mmc_core.c
new file mode 100644
index 0000000..8ab58ca
--- /dev/null
+++ b/drivers/mmc/host/tmio_mmc_core.c
@@ -0,0 +1,1394 @@
+/*
+ * Driver for the MMC / SD / SDIO IP found in:
+ *
+ * TC6393XB, TC6391XB, TC6387XB, T7L66XB, ASIC3, SH-Mobile SoCs
+ *
+ * Copyright (C) 2016 Sang Engineering, Wolfram Sang
+ * Copyright (C) 2015-16 Renesas Electronics Corporation
+ * Copyright (C) 2011 Guennadi Liakhovetski
+ * Copyright (C) 2007 Ian Molton
+ * Copyright (C) 2004 Ian Molton
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This driver draws mainly on scattered spec sheets, Reverse engineering
+ * of the toshiba e800  SD driver and some parts of the 2.4 ASIC3 driver (4 bit
+ * support). (Further 4 bit support from a later datasheet).
+ *
+ * TODO:
+ *   Investigate using a workqueue for PIO transfers
+ *   Eliminate FIXMEs
+ *   Better Power management
+ *   Handle MMC errors better
+ *   double buffer support
+ *
+ */
+
+#include <linux/delay.h>
+#include <linux/device.h>
+#include <linux/highmem.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/irq.h>
+#include <linux/mfd/tmio.h>
+#include <linux/mmc/card.h>
+#include <linux/mmc/host.h>
+#include <linux/mmc/mmc.h>
+#include <linux/mmc/slot-gpio.h>
+#include <linux/module.h>
+#include <linux/pagemap.h>
+#include <linux/platform_device.h>
+#include <linux/pm_qos.h>
+#include <linux/pm_runtime.h>
+#include <linux/regulator/consumer.h>
+#include <linux/mmc/sdio.h>
+#include <linux/scatterlist.h>
+#include <linux/spinlock.h>
+#include <linux/workqueue.h>
+
+#include "tmio_mmc.h"
+
+static inline void tmio_mmc_start_dma(struct tmio_mmc_host *host,
+				      struct mmc_data *data)
+{
+	if (host->dma_ops)
+		host->dma_ops->start(host, data);
+}
+
+static inline void tmio_mmc_enable_dma(struct tmio_mmc_host *host, bool enable)
+{
+	if (host->dma_ops)
+		host->dma_ops->enable(host, enable);
+}
+
+static inline void tmio_mmc_request_dma(struct tmio_mmc_host *host,
+					struct tmio_mmc_data *pdata)
+{
+	if (host->dma_ops) {
+		host->dma_ops->request(host, pdata);
+	} else {
+		host->chan_tx = NULL;
+		host->chan_rx = NULL;
+	}
+}
+
+static inline void tmio_mmc_release_dma(struct tmio_mmc_host *host)
+{
+	if (host->dma_ops)
+		host->dma_ops->release(host);
+}
+
+static inline void tmio_mmc_abort_dma(struct tmio_mmc_host *host)
+{
+	if (host->dma_ops)
+		host->dma_ops->abort(host);
+}
+
+void tmio_mmc_enable_mmc_irqs(struct tmio_mmc_host *host, u32 i)
+{
+	host->sdcard_irq_mask &= ~(i & TMIO_MASK_IRQ);
+	sd_ctrl_write32_as_16_and_16(host, CTL_IRQ_MASK, host->sdcard_irq_mask);
+}
+EXPORT_SYMBOL(tmio_mmc_enable_mmc_irqs);
+
+void tmio_mmc_disable_mmc_irqs(struct tmio_mmc_host *host, u32 i)
+{
+	host->sdcard_irq_mask |= (i & TMIO_MASK_IRQ);
+	sd_ctrl_write32_as_16_and_16(host, CTL_IRQ_MASK, host->sdcard_irq_mask);
+}
+EXPORT_SYMBOL(tmio_mmc_disable_mmc_irqs);
+
+static void tmio_mmc_ack_mmc_irqs(struct tmio_mmc_host *host, u32 i)
+{
+	sd_ctrl_write32_as_16_and_16(host, CTL_STATUS, ~i);
+}
+
+static void tmio_mmc_init_sg(struct tmio_mmc_host *host, struct mmc_data *data)
+{
+	host->sg_len = data->sg_len;
+	host->sg_ptr = data->sg;
+	host->sg_orig = data->sg;
+	host->sg_off = 0;
+}
+
+static int tmio_mmc_next_sg(struct tmio_mmc_host *host)
+{
+	host->sg_ptr = sg_next(host->sg_ptr);
+	host->sg_off = 0;
+	return --host->sg_len;
+}
+
+#define CMDREQ_TIMEOUT	5000
+
+#ifdef CONFIG_MMC_DEBUG
+
+#define STATUS_TO_TEXT(a, status, i) \
+	do { \
+		if (status & TMIO_STAT_##a) { \
+			if (i++) \
+				printk(" | "); \
+			printk(#a); \
+		} \
+	} while (0)
+
+static void pr_debug_status(u32 status)
+{
+	int i = 0;
+	pr_debug("status: %08x = ", status);
+	STATUS_TO_TEXT(CARD_REMOVE, status, i);
+	STATUS_TO_TEXT(CARD_INSERT, status, i);
+	STATUS_TO_TEXT(SIGSTATE, status, i);
+	STATUS_TO_TEXT(WRPROTECT, status, i);
+	STATUS_TO_TEXT(CARD_REMOVE_A, status, i);
+	STATUS_TO_TEXT(CARD_INSERT_A, status, i);
+	STATUS_TO_TEXT(SIGSTATE_A, status, i);
+	STATUS_TO_TEXT(CMD_IDX_ERR, status, i);
+	STATUS_TO_TEXT(STOPBIT_ERR, status, i);
+	STATUS_TO_TEXT(ILL_FUNC, status, i);
+	STATUS_TO_TEXT(CMD_BUSY, status, i);
+	STATUS_TO_TEXT(CMDRESPEND, status, i);
+	STATUS_TO_TEXT(DATAEND, status, i);
+	STATUS_TO_TEXT(CRCFAIL, status, i);
+	STATUS_TO_TEXT(DATATIMEOUT, status, i);
+	STATUS_TO_TEXT(CMDTIMEOUT, status, i);
+	STATUS_TO_TEXT(RXOVERFLOW, status, i);
+	STATUS_TO_TEXT(TXUNDERRUN, status, i);
+	STATUS_TO_TEXT(RXRDY, status, i);
+	STATUS_TO_TEXT(TXRQ, status, i);
+	STATUS_TO_TEXT(ILL_ACCESS, status, i);
+	printk("\n");
+}
+
+#else
+#define pr_debug_status(s)  do { } while (0)
+#endif
+
+static void tmio_mmc_enable_sdio_irq(struct mmc_host *mmc, int enable)
+{
+	struct tmio_mmc_host *host = mmc_priv(mmc);
+
+	if (enable && !host->sdio_irq_enabled) {
+		u16 sdio_status;
+
+		/* Keep device active while SDIO irq is enabled */
+		pm_runtime_get_sync(mmc_dev(mmc));
+
+		host->sdio_irq_enabled = true;
+		host->sdio_irq_mask = TMIO_SDIO_MASK_ALL &
+					~TMIO_SDIO_STAT_IOIRQ;
+
+		/* Clear obsolete interrupts before enabling */
+		sdio_status = sd_ctrl_read16(host, CTL_SDIO_STATUS) & ~TMIO_SDIO_MASK_ALL;
+		if (host->pdata->flags & TMIO_MMC_SDIO_STATUS_SETBITS)
+			sdio_status |= TMIO_SDIO_SETBITS_MASK;
+		sd_ctrl_write16(host, CTL_SDIO_STATUS, sdio_status);
+
+		sd_ctrl_write16(host, CTL_SDIO_IRQ_MASK, host->sdio_irq_mask);
+	} else if (!enable && host->sdio_irq_enabled) {
+		host->sdio_irq_mask = TMIO_SDIO_MASK_ALL;
+		sd_ctrl_write16(host, CTL_SDIO_IRQ_MASK, host->sdio_irq_mask);
+
+		host->sdio_irq_enabled = false;
+		pm_runtime_mark_last_busy(mmc_dev(mmc));
+		pm_runtime_put_autosuspend(mmc_dev(mmc));
+	}
+}
+
+static void tmio_mmc_clk_start(struct tmio_mmc_host *host)
+{
+	sd_ctrl_write16(host, CTL_SD_CARD_CLK_CTL, CLK_CTL_SCLKEN |
+		sd_ctrl_read16(host, CTL_SD_CARD_CLK_CTL));
+	msleep(host->pdata->flags & TMIO_MMC_MIN_RCAR2 ? 1 : 10);
+
+	if (host->pdata->flags & TMIO_MMC_HAVE_HIGH_REG) {
+		sd_ctrl_write16(host, CTL_CLK_AND_WAIT_CTL, 0x0100);
+		msleep(10);
+	}
+}
+
+static void tmio_mmc_clk_stop(struct tmio_mmc_host *host)
+{
+	if (host->pdata->flags & TMIO_MMC_HAVE_HIGH_REG) {
+		sd_ctrl_write16(host, CTL_CLK_AND_WAIT_CTL, 0x0000);
+		msleep(10);
+	}
+
+	sd_ctrl_write16(host, CTL_SD_CARD_CLK_CTL, ~CLK_CTL_SCLKEN &
+		sd_ctrl_read16(host, CTL_SD_CARD_CLK_CTL));
+	msleep(host->pdata->flags & TMIO_MMC_MIN_RCAR2 ? 5 : 10);
+}
+
+static void tmio_mmc_set_clock(struct tmio_mmc_host *host,
+				unsigned int new_clock)
+{
+	u32 clk = 0, clock;
+
+	if (new_clock == 0) {
+		tmio_mmc_clk_stop(host);
+		return;
+	}
+
+	if (host->clk_update)
+		clock = host->clk_update(host, new_clock) / 512;
+	else
+		clock = host->mmc->f_min;
+
+	for (clk = 0x80000080; new_clock >= (clock << 1); clk >>= 1)
+		clock <<= 1;
+
+	/* 1/1 clock is option */
+	if ((host->pdata->flags & TMIO_MMC_CLK_ACTUAL) && ((clk >> 22) & 0x1))
+		clk |= 0xff;
+
+	if (host->set_clk_div)
+		host->set_clk_div(host->pdev, (clk >> 22) & 1);
+
+	sd_ctrl_write16(host, CTL_SD_CARD_CLK_CTL, ~CLK_CTL_SCLKEN &
+			sd_ctrl_read16(host, CTL_SD_CARD_CLK_CTL));
+	sd_ctrl_write16(host, CTL_SD_CARD_CLK_CTL, clk & CLK_CTL_DIV_MASK);
+	if (!(host->pdata->flags & TMIO_MMC_MIN_RCAR2))
+		msleep(10);
+
+	tmio_mmc_clk_start(host);
+}
+
+static void tmio_mmc_reset(struct tmio_mmc_host *host)
+{
+	/* FIXME - should we set stop clock reg here */
+	sd_ctrl_write16(host, CTL_RESET_SD, 0x0000);
+	if (host->pdata->flags & TMIO_MMC_HAVE_HIGH_REG)
+		sd_ctrl_write16(host, CTL_RESET_SDIO, 0x0000);
+	msleep(10);
+	sd_ctrl_write16(host, CTL_RESET_SD, 0x0001);
+	if (host->pdata->flags & TMIO_MMC_HAVE_HIGH_REG)
+		sd_ctrl_write16(host, CTL_RESET_SDIO, 0x0001);
+	msleep(10);
+}
+
+static void tmio_mmc_reset_work(struct work_struct *work)
+{
+	struct tmio_mmc_host *host = container_of(work, struct tmio_mmc_host,
+						  delayed_reset_work.work);
+	struct mmc_request *mrq;
+	unsigned long flags;
+
+	spin_lock_irqsave(&host->lock, flags);
+	mrq = host->mrq;
+
+	/*
+	 * is request already finished? Since we use a non-blocking
+	 * cancel_delayed_work(), it can happen, that a .set_ios() call preempts
+	 * us, so, have to check for IS_ERR(host->mrq)
+	 */
+	if (IS_ERR_OR_NULL(mrq)
+	    || time_is_after_jiffies(host->last_req_ts +
+		msecs_to_jiffies(CMDREQ_TIMEOUT))) {
+		spin_unlock_irqrestore(&host->lock, flags);
+		return;
+	}
+
+	dev_warn(&host->pdev->dev,
+		"timeout waiting for hardware interrupt (CMD%u)\n",
+		mrq->cmd->opcode);
+
+	if (host->data)
+		host->data->error = -ETIMEDOUT;
+	else if (host->cmd)
+		host->cmd->error = -ETIMEDOUT;
+	else
+		mrq->cmd->error = -ETIMEDOUT;
+
+	host->cmd = NULL;
+	host->data = NULL;
+	host->force_pio = false;
+
+	spin_unlock_irqrestore(&host->lock, flags);
+
+	tmio_mmc_reset(host);
+
+	/* Ready for new calls */
+	host->mrq = NULL;
+
+	tmio_mmc_abort_dma(host);
+	mmc_request_done(host->mmc, mrq);
+}
+
+/* called with host->lock held, interrupts disabled */
+static void tmio_mmc_finish_request(struct tmio_mmc_host *host)
+{
+	struct mmc_request *mrq;
+	unsigned long flags;
+
+	spin_lock_irqsave(&host->lock, flags);
+
+	mrq = host->mrq;
+	if (IS_ERR_OR_NULL(mrq)) {
+		spin_unlock_irqrestore(&host->lock, flags);
+		return;
+	}
+
+	host->cmd = NULL;
+	host->data = NULL;
+	host->force_pio = false;
+
+	cancel_delayed_work(&host->delayed_reset_work);
+
+	host->mrq = NULL;
+	spin_unlock_irqrestore(&host->lock, flags);
+
+	if (mrq->cmd->error || (mrq->data && mrq->data->error))
+		tmio_mmc_abort_dma(host);
+
+	if (host->check_scc_error)
+		host->check_scc_error(host);
+
+	mmc_request_done(host->mmc, mrq);
+}
+
+static void tmio_mmc_done_work(struct work_struct *work)
+{
+	struct tmio_mmc_host *host = container_of(work, struct tmio_mmc_host,
+						  done);
+	tmio_mmc_finish_request(host);
+}
+
+/* These are the bitmasks the tmio chip requires to implement the MMC response
+ * types. Note that R1 and R6 are the same in this scheme. */
+#define APP_CMD        0x0040
+#define RESP_NONE      0x0300
+#define RESP_R1        0x0400
+#define RESP_R1B       0x0500
+#define RESP_R2        0x0600
+#define RESP_R3        0x0700
+#define DATA_PRESENT   0x0800
+#define TRANSFER_READ  0x1000
+#define TRANSFER_MULTI 0x2000
+#define SECURITY_CMD   0x4000
+#define NO_CMD12_ISSUE 0x4000 /* TMIO_MMC_HAVE_CMD12_CTRL */
+
+static int tmio_mmc_start_command(struct tmio_mmc_host *host, struct mmc_command *cmd)
+{
+	struct mmc_data *data = host->data;
+	int c = cmd->opcode;
+	u32 irq_mask = TMIO_MASK_CMD;
+
+	/* CMD12 is handled by hardware */
+	if (cmd->opcode == MMC_STOP_TRANSMISSION && !cmd->arg) {
+		sd_ctrl_write16(host, CTL_STOP_INTERNAL_ACTION, TMIO_STOP_STP);
+		return 0;
+	}
+
+	switch (mmc_resp_type(cmd)) {
+	case MMC_RSP_NONE: c |= RESP_NONE; break;
+	case MMC_RSP_R1:
+	case MMC_RSP_R1_NO_CRC:
+			   c |= RESP_R1;   break;
+	case MMC_RSP_R1B:  c |= RESP_R1B;  break;
+	case MMC_RSP_R2:   c |= RESP_R2;   break;
+	case MMC_RSP_R3:   c |= RESP_R3;   break;
+	default:
+		pr_debug("Unknown response type %d\n", mmc_resp_type(cmd));
+		return -EINVAL;
+	}
+
+	host->cmd = cmd;
+
+/* FIXME - this seems to be ok commented out but the spec suggest this bit
+ *         should be set when issuing app commands.
+ *	if(cmd->flags & MMC_FLAG_ACMD)
+ *		c |= APP_CMD;
+ */
+	if (data) {
+		c |= DATA_PRESENT;
+		if (data->blocks > 1) {
+			sd_ctrl_write16(host, CTL_STOP_INTERNAL_ACTION, TMIO_STOP_SEC);
+			c |= TRANSFER_MULTI;
+
+			/*
+			 * Disable auto CMD12 at IO_RW_EXTENDED when
+			 * multiple block transfer
+			 */
+			if ((host->pdata->flags & TMIO_MMC_HAVE_CMD12_CTRL) &&
+			    (cmd->opcode == SD_IO_RW_EXTENDED))
+				c |= NO_CMD12_ISSUE;
+		}
+		if (data->flags & MMC_DATA_READ)
+			c |= TRANSFER_READ;
+	}
+
+	if (!host->native_hotplug)
+		irq_mask &= ~(TMIO_STAT_CARD_REMOVE | TMIO_STAT_CARD_INSERT);
+	tmio_mmc_enable_mmc_irqs(host, irq_mask);
+
+	/* Fire off the command */
+	sd_ctrl_write32_as_16_and_16(host, CTL_ARG_REG, cmd->arg);
+	sd_ctrl_write16(host, CTL_SD_CMD, c);
+
+	return 0;
+}
+
+static void tmio_mmc_transfer_data(struct tmio_mmc_host *host,
+				   unsigned short *buf,
+				   unsigned int count)
+{
+	int is_read = host->data->flags & MMC_DATA_READ;
+	u8  *buf8;
+
+	/*
+	 * Transfer the data
+	 */
+	if (host->pdata->flags & TMIO_MMC_32BIT_DATA_PORT) {
+		u8 data[4] = { };
+
+		if (is_read)
+			sd_ctrl_read32_rep(host, CTL_SD_DATA_PORT, (u32 *)buf,
+					   count >> 2);
+		else
+			sd_ctrl_write32_rep(host, CTL_SD_DATA_PORT, (u32 *)buf,
+					    count >> 2);
+
+		/* if count was multiple of 4 */
+		if (!(count & 0x3))
+			return;
+
+		buf8 = (u8 *)(buf + (count >> 2));
+		count %= 4;
+
+		if (is_read) {
+			sd_ctrl_read32_rep(host, CTL_SD_DATA_PORT,
+					   (u32 *)data, 1);
+			memcpy(buf8, data, count);
+		} else {
+			memcpy(data, buf8, count);
+			sd_ctrl_write32_rep(host, CTL_SD_DATA_PORT,
+					    (u32 *)data, 1);
+		}
+
+		return;
+	}
+
+	if (is_read)
+		sd_ctrl_read16_rep(host, CTL_SD_DATA_PORT, buf, count >> 1);
+	else
+		sd_ctrl_write16_rep(host, CTL_SD_DATA_PORT, buf, count >> 1);
+
+	/* if count was even number */
+	if (!(count & 0x1))
+		return;
+
+	/* if count was odd number */
+	buf8 = (u8 *)(buf + (count >> 1));
+
+	/*
+	 * FIXME
+	 *
+	 * driver and this function are assuming that
+	 * it is used as little endian
+	 */
+	if (is_read)
+		*buf8 = sd_ctrl_read16(host, CTL_SD_DATA_PORT) & 0xff;
+	else
+		sd_ctrl_write16(host, CTL_SD_DATA_PORT, *buf8);
+}
+
+/*
+ * This chip always returns (at least?) as much data as you ask for.
+ * I'm unsure what happens if you ask for less than a block. This should be
+ * looked into to ensure that a funny length read doesn't hose the controller.
+ */
+static void tmio_mmc_pio_irq(struct tmio_mmc_host *host)
+{
+	struct mmc_data *data = host->data;
+	void *sg_virt;
+	unsigned short *buf;
+	unsigned int count;
+	unsigned long flags;
+
+	if ((host->chan_tx || host->chan_rx) && !host->force_pio) {
+		pr_err("PIO IRQ in DMA mode!\n");
+		return;
+	} else if (!data) {
+		pr_debug("Spurious PIO IRQ\n");
+		return;
+	}
+
+	sg_virt = tmio_mmc_kmap_atomic(host->sg_ptr, &flags);
+	buf = (unsigned short *)(sg_virt + host->sg_off);
+
+	count = host->sg_ptr->length - host->sg_off;
+	if (count > data->blksz)
+		count = data->blksz;
+
+	pr_debug("count: %08x offset: %08x flags %08x\n",
+		 count, host->sg_off, data->flags);
+
+	/* Transfer the data */
+	tmio_mmc_transfer_data(host, buf, count);
+
+	host->sg_off += count;
+
+	tmio_mmc_kunmap_atomic(host->sg_ptr, &flags, sg_virt);
+
+	if (host->sg_off == host->sg_ptr->length)
+		tmio_mmc_next_sg(host);
+
+	return;
+}
+
+static void tmio_mmc_check_bounce_buffer(struct tmio_mmc_host *host)
+{
+	if (host->sg_ptr == &host->bounce_sg) {
+		unsigned long flags;
+		void *sg_vaddr = tmio_mmc_kmap_atomic(host->sg_orig, &flags);
+		memcpy(sg_vaddr, host->bounce_buf, host->bounce_sg.length);
+		tmio_mmc_kunmap_atomic(host->sg_orig, &flags, sg_vaddr);
+	}
+}
+
+/* needs to be called with host->lock held */
+void tmio_mmc_do_data_irq(struct tmio_mmc_host *host)
+{
+	struct mmc_data *data = host->data;
+	struct mmc_command *stop;
+
+	host->data = NULL;
+
+	if (!data) {
+		dev_warn(&host->pdev->dev, "Spurious data end IRQ\n");
+		return;
+	}
+	stop = data->stop;
+
+	/* FIXME - return correct transfer count on errors */
+	if (!data->error)
+		data->bytes_xfered = data->blocks * data->blksz;
+	else
+		data->bytes_xfered = 0;
+
+	pr_debug("Completed data request\n");
+
+	/*
+	 * FIXME: other drivers allow an optional stop command of any given type
+	 *        which we dont do, as the chip can auto generate them.
+	 *        Perhaps we can be smarter about when to use auto CMD12 and
+	 *        only issue the auto request when we know this is the desired
+	 *        stop command, allowing fallback to the stop command the
+	 *        upper layers expect. For now, we do what works.
+	 */
+
+	if (data->flags & MMC_DATA_READ) {
+		if (host->chan_rx && !host->force_pio)
+			tmio_mmc_check_bounce_buffer(host);
+		dev_dbg(&host->pdev->dev, "Complete Rx request %p\n",
+			host->mrq);
+	} else {
+		dev_dbg(&host->pdev->dev, "Complete Tx request %p\n",
+			host->mrq);
+	}
+
+	if (stop) {
+		if (stop->opcode != MMC_STOP_TRANSMISSION || stop->arg)
+			dev_err(&host->pdev->dev, "unsupported stop: CMD%u,0x%x. We did CMD12,0\n",
+				stop->opcode, stop->arg);
+
+		/* fill in response from auto CMD12 */
+		stop->resp[0] = sd_ctrl_read16_and_16_as_32(host, CTL_RESPONSE);
+
+		sd_ctrl_write16(host, CTL_STOP_INTERNAL_ACTION, 0);
+	}
+
+	schedule_work(&host->done);
+}
+EXPORT_SYMBOL(tmio_mmc_do_data_irq);
+
+static void tmio_mmc_data_irq(struct tmio_mmc_host *host, unsigned int stat)
+{
+	struct mmc_data *data;
+	spin_lock(&host->lock);
+	data = host->data;
+
+	if (!data)
+		goto out;
+
+	if (stat & TMIO_STAT_CRCFAIL || stat & TMIO_STAT_STOPBIT_ERR ||
+	    stat & TMIO_STAT_TXUNDERRUN)
+		data->error = -EILSEQ;
+	if (host->chan_tx && (data->flags & MMC_DATA_WRITE) && !host->force_pio) {
+		u32 status = sd_ctrl_read16_and_16_as_32(host, CTL_STATUS);
+		bool done = false;
+
+		/*
+		 * Has all data been written out yet? Testing on SuperH showed,
+		 * that in most cases the first interrupt comes already with the
+		 * BUSY status bit clear, but on some operations, like mount or
+		 * in the beginning of a write / sync / umount, there is one
+		 * DATAEND interrupt with the BUSY bit set, in this cases
+		 * waiting for one more interrupt fixes the problem.
+		 */
+		if (host->pdata->flags & TMIO_MMC_HAS_IDLE_WAIT) {
+			if (status & TMIO_STAT_SCLKDIVEN)
+				done = true;
+		} else {
+			if (!(status & TMIO_STAT_CMD_BUSY))
+				done = true;
+		}
+
+		if (done) {
+			tmio_mmc_disable_mmc_irqs(host, TMIO_STAT_DATAEND);
+			complete(&host->dma_dataend);
+		}
+	} else if (host->chan_rx && (data->flags & MMC_DATA_READ) && !host->force_pio) {
+		tmio_mmc_disable_mmc_irqs(host, TMIO_STAT_DATAEND);
+		complete(&host->dma_dataend);
+	} else {
+		tmio_mmc_do_data_irq(host);
+		tmio_mmc_disable_mmc_irqs(host, TMIO_MASK_READOP | TMIO_MASK_WRITEOP);
+	}
+out:
+	spin_unlock(&host->lock);
+}
+
+static void tmio_mmc_cmd_irq(struct tmio_mmc_host *host,
+	unsigned int stat)
+{
+	struct mmc_command *cmd = host->cmd;
+	int i, addr;
+
+	spin_lock(&host->lock);
+
+	if (!host->cmd) {
+		pr_debug("Spurious CMD irq\n");
+		goto out;
+	}
+
+	/* This controller is sicker than the PXA one. Not only do we need to
+	 * drop the top 8 bits of the first response word, we also need to
+	 * modify the order of the response for short response command types.
+	 */
+
+	for (i = 3, addr = CTL_RESPONSE ; i >= 0 ; i--, addr += 4)
+		cmd->resp[i] = sd_ctrl_read16_and_16_as_32(host, addr);
+
+	if (cmd->flags &  MMC_RSP_136) {
+		cmd->resp[0] = (cmd->resp[0] << 8) | (cmd->resp[1] >> 24);
+		cmd->resp[1] = (cmd->resp[1] << 8) | (cmd->resp[2] >> 24);
+		cmd->resp[2] = (cmd->resp[2] << 8) | (cmd->resp[3] >> 24);
+		cmd->resp[3] <<= 8;
+	} else if (cmd->flags & MMC_RSP_R3) {
+		cmd->resp[0] = cmd->resp[3];
+	}
+
+	if (stat & TMIO_STAT_CMDTIMEOUT)
+		cmd->error = -ETIMEDOUT;
+	else if ((stat & TMIO_STAT_CRCFAIL && cmd->flags & MMC_RSP_CRC) ||
+		 stat & TMIO_STAT_STOPBIT_ERR ||
+		 stat & TMIO_STAT_CMD_IDX_ERR)
+		cmd->error = -EILSEQ;
+
+	/* If there is data to handle we enable data IRQs here, and
+	 * we will ultimatley finish the request in the data_end handler.
+	 * If theres no data or we encountered an error, finish now.
+	 */
+	if (host->data && (!cmd->error || cmd->error == -EILSEQ)) {
+		if (host->data->flags & MMC_DATA_READ) {
+			if (host->force_pio || !host->chan_rx)
+				tmio_mmc_enable_mmc_irqs(host, TMIO_MASK_READOP);
+			else
+				tasklet_schedule(&host->dma_issue);
+		} else {
+			if (host->force_pio || !host->chan_tx)
+				tmio_mmc_enable_mmc_irqs(host, TMIO_MASK_WRITEOP);
+			else
+				tasklet_schedule(&host->dma_issue);
+		}
+	} else {
+		schedule_work(&host->done);
+	}
+
+out:
+	spin_unlock(&host->lock);
+}
+
+static bool __tmio_mmc_card_detect_irq(struct tmio_mmc_host *host,
+				      int ireg, int status)
+{
+	struct mmc_host *mmc = host->mmc;
+
+	/* Card insert / remove attempts */
+	if (ireg & (TMIO_STAT_CARD_INSERT | TMIO_STAT_CARD_REMOVE)) {
+		tmio_mmc_ack_mmc_irqs(host, TMIO_STAT_CARD_INSERT |
+			TMIO_STAT_CARD_REMOVE);
+		if ((((ireg & TMIO_STAT_CARD_REMOVE) && mmc->card) ||
+		     ((ireg & TMIO_STAT_CARD_INSERT) && !mmc->card)) &&
+		    !work_pending(&mmc->detect.work))
+			mmc_detect_change(host->mmc, msecs_to_jiffies(100));
+		return true;
+	}
+
+	return false;
+}
+
+static bool __tmio_mmc_sdcard_irq(struct tmio_mmc_host *host,
+				 int ireg, int status)
+{
+	/* Command completion */
+	if (ireg & (TMIO_STAT_CMDRESPEND | TMIO_STAT_CMDTIMEOUT)) {
+		tmio_mmc_ack_mmc_irqs(host,
+			     TMIO_STAT_CMDRESPEND |
+			     TMIO_STAT_CMDTIMEOUT);
+		tmio_mmc_cmd_irq(host, status);
+		return true;
+	}
+
+	/* Data transfer */
+	if (ireg & (TMIO_STAT_RXRDY | TMIO_STAT_TXRQ)) {
+		tmio_mmc_ack_mmc_irqs(host, TMIO_STAT_RXRDY | TMIO_STAT_TXRQ);
+		tmio_mmc_pio_irq(host);
+		return true;
+	}
+
+	/* Data transfer completion */
+	if (ireg & TMIO_STAT_DATAEND) {
+		tmio_mmc_ack_mmc_irqs(host, TMIO_STAT_DATAEND);
+		tmio_mmc_data_irq(host, status);
+		return true;
+	}
+
+	return false;
+}
+
+static bool __tmio_mmc_sdio_irq(int irq, void *devid)
+{
+	struct tmio_mmc_host *host = devid;
+	struct mmc_host *mmc = host->mmc;
+	struct tmio_mmc_data *pdata = host->pdata;
+	unsigned int ireg, status;
+	unsigned int sdio_status;
+
+	if (!(pdata->flags & TMIO_MMC_SDIO_IRQ))
+		return false;
+
+	status = sd_ctrl_read16(host, CTL_SDIO_STATUS);
+	ireg = status & TMIO_SDIO_MASK_ALL & ~host->sdio_irq_mask;
+
+	sdio_status = status & ~TMIO_SDIO_MASK_ALL;
+	if (pdata->flags & TMIO_MMC_SDIO_STATUS_SETBITS)
+		sdio_status |= TMIO_SDIO_SETBITS_MASK;
+
+	sd_ctrl_write16(host, CTL_SDIO_STATUS, sdio_status);
+
+	if (mmc->caps & MMC_CAP_SDIO_IRQ && ireg & TMIO_SDIO_STAT_IOIRQ)
+		mmc_signal_sdio_irq(mmc);
+
+	return ireg;
+}
+
+irqreturn_t tmio_mmc_irq(int irq, void *devid)
+{
+	struct tmio_mmc_host *host = devid;
+	unsigned int ireg, status;
+
+	status = sd_ctrl_read16_and_16_as_32(host, CTL_STATUS);
+	ireg = status & TMIO_MASK_IRQ & ~host->sdcard_irq_mask;
+
+	pr_debug_status(status);
+	pr_debug_status(ireg);
+
+	/* Clear the status except the interrupt status */
+	sd_ctrl_write32_as_16_and_16(host, CTL_STATUS, TMIO_MASK_IRQ);
+
+	if (__tmio_mmc_card_detect_irq(host, ireg, status))
+		return IRQ_HANDLED;
+	if (__tmio_mmc_sdcard_irq(host, ireg, status))
+		return IRQ_HANDLED;
+
+	if (__tmio_mmc_sdio_irq(irq, devid))
+		return IRQ_HANDLED;
+
+	return IRQ_NONE;
+}
+EXPORT_SYMBOL(tmio_mmc_irq);
+
+static int tmio_mmc_start_data(struct tmio_mmc_host *host,
+	struct mmc_data *data)
+{
+	struct tmio_mmc_data *pdata = host->pdata;
+
+	pr_debug("setup data transfer: blocksize %08x  nr_blocks %d\n",
+		 data->blksz, data->blocks);
+
+	/* Some hardware cannot perform 2 byte requests in 4/8 bit mode */
+	if (host->mmc->ios.bus_width == MMC_BUS_WIDTH_4 ||
+	    host->mmc->ios.bus_width == MMC_BUS_WIDTH_8) {
+		int blksz_2bytes = pdata->flags & TMIO_MMC_BLKSZ_2BYTES;
+
+		if (data->blksz < 2 || (data->blksz < 4 && !blksz_2bytes)) {
+			pr_err("%s: %d byte block unsupported in 4/8 bit mode\n",
+			       mmc_hostname(host->mmc), data->blksz);
+			return -EINVAL;
+		}
+	}
+
+	tmio_mmc_init_sg(host, data);
+	host->data = data;
+
+	/* Set transfer length / blocksize */
+	sd_ctrl_write16(host, CTL_SD_XFER_LEN, data->blksz);
+	sd_ctrl_write16(host, CTL_XFER_BLK_COUNT, data->blocks);
+
+	tmio_mmc_start_dma(host, data);
+
+	return 0;
+}
+
+static void tmio_mmc_hw_reset(struct mmc_host *mmc)
+{
+	struct tmio_mmc_host *host = mmc_priv(mmc);
+
+	if (host->hw_reset)
+		host->hw_reset(host);
+}
+
+static int tmio_mmc_execute_tuning(struct mmc_host *mmc, u32 opcode)
+{
+	struct tmio_mmc_host *host = mmc_priv(mmc);
+	int i, ret = 0;
+
+	if (!host->init_tuning || !host->select_tuning)
+		/* Tuning is not supported */
+		goto out;
+
+	host->tap_num = host->init_tuning(host);
+	if (!host->tap_num)
+		/* Tuning is not supported */
+		goto out;
+
+	if (host->tap_num * 2 >= sizeof(host->taps) * BITS_PER_BYTE) {
+		dev_warn_once(&host->pdev->dev,
+		      "Too many taps, skipping tuning. Please consider updating size of taps field of tmio_mmc_host\n");
+		goto out;
+	}
+
+	bitmap_zero(host->taps, host->tap_num * 2);
+
+	/* Issue CMD19 twice for each tap */
+	for (i = 0; i < 2 * host->tap_num; i++) {
+		if (host->prepare_tuning)
+			host->prepare_tuning(host, i % host->tap_num);
+
+		ret = mmc_send_tuning(mmc, opcode, NULL);
+		if (ret && ret != -EILSEQ)
+			goto out;
+		if (ret == 0)
+			set_bit(i, host->taps);
+
+		mdelay(1);
+	}
+
+	ret = host->select_tuning(host);
+
+out:
+	if (ret < 0) {
+		dev_warn(&host->pdev->dev, "Tuning procedure failed\n");
+		tmio_mmc_hw_reset(mmc);
+	}
+
+	return ret;
+}
+
+/* Process requests from the MMC layer */
+static void tmio_mmc_request(struct mmc_host *mmc, struct mmc_request *mrq)
+{
+	struct tmio_mmc_host *host = mmc_priv(mmc);
+	unsigned long flags;
+	int ret;
+
+	spin_lock_irqsave(&host->lock, flags);
+
+	if (host->mrq) {
+		pr_debug("request not null\n");
+		if (IS_ERR(host->mrq)) {
+			spin_unlock_irqrestore(&host->lock, flags);
+			mrq->cmd->error = -EAGAIN;
+			mmc_request_done(mmc, mrq);
+			return;
+		}
+	}
+
+	host->last_req_ts = jiffies;
+	wmb();
+	host->mrq = mrq;
+
+	spin_unlock_irqrestore(&host->lock, flags);
+
+	if (mrq->data) {
+		ret = tmio_mmc_start_data(host, mrq->data);
+		if (ret)
+			goto fail;
+	}
+
+	ret = tmio_mmc_start_command(host, mrq->cmd);
+	if (!ret) {
+		schedule_delayed_work(&host->delayed_reset_work,
+				      msecs_to_jiffies(CMDREQ_TIMEOUT));
+		return;
+	}
+
+fail:
+	host->force_pio = false;
+	host->mrq = NULL;
+	mrq->cmd->error = ret;
+	mmc_request_done(mmc, mrq);
+}
+
+static int tmio_mmc_clk_enable(struct tmio_mmc_host *host)
+{
+	if (!host->clk_enable)
+		return -ENOTSUPP;
+
+	return host->clk_enable(host);
+}
+
+static void tmio_mmc_clk_disable(struct tmio_mmc_host *host)
+{
+	if (host->clk_disable)
+		host->clk_disable(host);
+}
+
+static void tmio_mmc_power_on(struct tmio_mmc_host *host, unsigned short vdd)
+{
+	struct mmc_host *mmc = host->mmc;
+	int ret = 0;
+
+	/* .set_ios() is returning void, so, no chance to report an error */
+
+	if (host->set_pwr)
+		host->set_pwr(host->pdev, 1);
+
+	if (!IS_ERR(mmc->supply.vmmc)) {
+		ret = mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, vdd);
+		/*
+		 * Attention: empiric value. With a b43 WiFi SDIO card this
+		 * delay proved necessary for reliable card-insertion probing.
+		 * 100us were not enough. Is this the same 140us delay, as in
+		 * tmio_mmc_set_ios()?
+		 */
+		udelay(200);
+	}
+	/*
+	 * It seems, VccQ should be switched on after Vcc, this is also what the
+	 * omap_hsmmc.c driver does.
+	 */
+	if (!IS_ERR(mmc->supply.vqmmc) && !ret) {
+		ret = regulator_enable(mmc->supply.vqmmc);
+		udelay(200);
+	}
+
+	if (ret < 0)
+		dev_dbg(&host->pdev->dev, "Regulators failed to power up: %d\n",
+			ret);
+}
+
+static void tmio_mmc_power_off(struct tmio_mmc_host *host)
+{
+	struct mmc_host *mmc = host->mmc;
+
+	if (!IS_ERR(mmc->supply.vqmmc))
+		regulator_disable(mmc->supply.vqmmc);
+
+	if (!IS_ERR(mmc->supply.vmmc))
+		mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, 0);
+
+	if (host->set_pwr)
+		host->set_pwr(host->pdev, 0);
+}
+
+static void tmio_mmc_set_bus_width(struct tmio_mmc_host *host,
+				unsigned char bus_width)
+{
+	u16 reg = sd_ctrl_read16(host, CTL_SD_MEM_CARD_OPT)
+				& ~(CARD_OPT_WIDTH | CARD_OPT_WIDTH8);
+
+	/* reg now applies to MMC_BUS_WIDTH_4 */
+	if (bus_width == MMC_BUS_WIDTH_1)
+		reg |= CARD_OPT_WIDTH;
+	else if (bus_width == MMC_BUS_WIDTH_8)
+		reg |= CARD_OPT_WIDTH8;
+
+	sd_ctrl_write16(host, CTL_SD_MEM_CARD_OPT, reg);
+}
+
+/* Set MMC clock / power.
+ * Note: This controller uses a simple divider scheme therefore it cannot
+ * run a MMC card at full speed (20MHz). The max clock is 24MHz on SD, but as
+ * MMC wont run that fast, it has to be clocked at 12MHz which is the next
+ * slowest setting.
+ */
+static void tmio_mmc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
+{
+	struct tmio_mmc_host *host = mmc_priv(mmc);
+	struct device *dev = &host->pdev->dev;
+	unsigned long flags;
+
+	mutex_lock(&host->ios_lock);
+
+	spin_lock_irqsave(&host->lock, flags);
+	if (host->mrq) {
+		if (IS_ERR(host->mrq)) {
+			dev_dbg(dev,
+				"%s.%d: concurrent .set_ios(), clk %u, mode %u\n",
+				current->comm, task_pid_nr(current),
+				ios->clock, ios->power_mode);
+			host->mrq = ERR_PTR(-EINTR);
+		} else {
+			dev_dbg(dev,
+				"%s.%d: CMD%u active since %lu, now %lu!\n",
+				current->comm, task_pid_nr(current),
+				host->mrq->cmd->opcode, host->last_req_ts, jiffies);
+		}
+		spin_unlock_irqrestore(&host->lock, flags);
+
+		mutex_unlock(&host->ios_lock);
+		return;
+	}
+
+	host->mrq = ERR_PTR(-EBUSY);
+
+	spin_unlock_irqrestore(&host->lock, flags);
+
+	switch (ios->power_mode) {
+	case MMC_POWER_OFF:
+		tmio_mmc_power_off(host);
+		tmio_mmc_clk_stop(host);
+		break;
+	case MMC_POWER_UP:
+		tmio_mmc_power_on(host, ios->vdd);
+		tmio_mmc_set_clock(host, ios->clock);
+		tmio_mmc_set_bus_width(host, ios->bus_width);
+		break;
+	case MMC_POWER_ON:
+		tmio_mmc_set_clock(host, ios->clock);
+		tmio_mmc_set_bus_width(host, ios->bus_width);
+		break;
+	}
+
+	/* Let things settle. delay taken from winCE driver */
+	udelay(140);
+	if (PTR_ERR(host->mrq) == -EINTR)
+		dev_dbg(&host->pdev->dev,
+			"%s.%d: IOS interrupted: clk %u, mode %u",
+			current->comm, task_pid_nr(current),
+			ios->clock, ios->power_mode);
+	host->mrq = NULL;
+
+	host->clk_cache = ios->clock;
+
+	mutex_unlock(&host->ios_lock);
+}
+
+static int tmio_mmc_get_ro(struct mmc_host *mmc)
+{
+	struct tmio_mmc_host *host = mmc_priv(mmc);
+	struct tmio_mmc_data *pdata = host->pdata;
+	int ret = mmc_gpio_get_ro(mmc);
+	if (ret >= 0)
+		return ret;
+
+	ret = !((pdata->flags & TMIO_MMC_WRPROTECT_DISABLE) ||
+		(sd_ctrl_read16_and_16_as_32(host, CTL_STATUS) & TMIO_STAT_WRPROTECT));
+
+	return ret;
+}
+
+static int tmio_multi_io_quirk(struct mmc_card *card,
+			       unsigned int direction, int blk_size)
+{
+	struct tmio_mmc_host *host = mmc_priv(card->host);
+
+	if (host->multi_io_quirk)
+		return host->multi_io_quirk(card, direction, blk_size);
+
+	return blk_size;
+}
+
+static struct mmc_host_ops tmio_mmc_ops = {
+	.request	= tmio_mmc_request,
+	.set_ios	= tmio_mmc_set_ios,
+	.get_ro         = tmio_mmc_get_ro,
+	.get_cd		= mmc_gpio_get_cd,
+	.enable_sdio_irq = tmio_mmc_enable_sdio_irq,
+	.multi_io_quirk	= tmio_multi_io_quirk,
+	.hw_reset	= tmio_mmc_hw_reset,
+	.execute_tuning = tmio_mmc_execute_tuning,
+};
+
+static int tmio_mmc_init_ocr(struct tmio_mmc_host *host)
+{
+	struct tmio_mmc_data *pdata = host->pdata;
+	struct mmc_host *mmc = host->mmc;
+
+	mmc_regulator_get_supply(mmc);
+
+	/* use ocr_mask if no regulator */
+	if (!mmc->ocr_avail)
+		mmc->ocr_avail =  pdata->ocr_mask;
+
+	/*
+	 * try again.
+	 * There is possibility that regulator has not been probed
+	 */
+	if (!mmc->ocr_avail)
+		return -EPROBE_DEFER;
+
+	return 0;
+}
+
+static void tmio_mmc_of_parse(struct platform_device *pdev,
+			      struct tmio_mmc_data *pdata)
+{
+	const struct device_node *np = pdev->dev.of_node;
+	if (!np)
+		return;
+
+	if (of_get_property(np, "toshiba,mmc-wrprotect-disable", NULL))
+		pdata->flags |= TMIO_MMC_WRPROTECT_DISABLE;
+}
+
+struct tmio_mmc_host*
+tmio_mmc_host_alloc(struct platform_device *pdev)
+{
+	struct tmio_mmc_host *host;
+	struct mmc_host *mmc;
+
+	mmc = mmc_alloc_host(sizeof(struct tmio_mmc_host), &pdev->dev);
+	if (!mmc)
+		return NULL;
+
+	host = mmc_priv(mmc);
+	host->mmc = mmc;
+	host->pdev = pdev;
+
+	return host;
+}
+EXPORT_SYMBOL(tmio_mmc_host_alloc);
+
+void tmio_mmc_host_free(struct tmio_mmc_host *host)
+{
+	mmc_free_host(host->mmc);
+}
+EXPORT_SYMBOL(tmio_mmc_host_free);
+
+int tmio_mmc_host_probe(struct tmio_mmc_host *_host,
+			struct tmio_mmc_data *pdata,
+			const struct tmio_mmc_dma_ops *dma_ops)
+{
+	struct platform_device *pdev = _host->pdev;
+	struct mmc_host *mmc = _host->mmc;
+	struct resource *res_ctl;
+	int ret;
+	u32 irq_mask = TMIO_MASK_CMD;
+
+	tmio_mmc_of_parse(pdev, pdata);
+
+	if (!(pdata->flags & TMIO_MMC_HAS_IDLE_WAIT))
+		_host->write16_hook = NULL;
+
+	res_ctl = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	if (!res_ctl)
+		return -EINVAL;
+
+	ret = mmc_of_parse(mmc);
+	if (ret < 0)
+		return ret;
+
+	_host->pdata = pdata;
+	platform_set_drvdata(pdev, mmc);
+
+	_host->set_pwr = pdata->set_pwr;
+	_host->set_clk_div = pdata->set_clk_div;
+
+	ret = tmio_mmc_init_ocr(_host);
+	if (ret < 0)
+		return ret;
+
+	_host->ctl = devm_ioremap(&pdev->dev,
+				  res_ctl->start, resource_size(res_ctl));
+	if (!_host->ctl)
+		return -ENOMEM;
+
+	tmio_mmc_ops.card_busy = _host->card_busy;
+	tmio_mmc_ops.start_signal_voltage_switch = _host->start_signal_voltage_switch;
+	mmc->ops = &tmio_mmc_ops;
+
+	mmc->caps |= MMC_CAP_4_BIT_DATA | pdata->capabilities;
+	mmc->caps2 |= pdata->capabilities2;
+	mmc->max_segs = 32;
+	mmc->max_blk_size = 512;
+	mmc->max_blk_count = (PAGE_CACHE_SIZE / mmc->max_blk_size) *
+		mmc->max_segs;
+	mmc->max_req_size = mmc->max_blk_size * mmc->max_blk_count;
+	mmc->max_seg_size = mmc->max_req_size;
+
+	_host->native_hotplug = !(pdata->flags & TMIO_MMC_USE_GPIO_CD ||
+				  mmc->caps & MMC_CAP_NEEDS_POLL ||
+				  !mmc_card_is_removable(mmc));
+
+	/*
+	 * On Gen2+, eMMC with NONREMOVABLE currently fails because native
+	 * hotplug gets disabled. It seems RuntimePM related yet we need further
+	 * research. Since we are planning a PM overhaul anyway, let's enforce
+	 * for now the device being active by enabling native hotplug always.
+	 */
+	if (pdata->flags & TMIO_MMC_MIN_RCAR2)
+		_host->native_hotplug = true;
+
+	if (tmio_mmc_clk_enable(_host) < 0) {
+		mmc->f_max = pdata->hclk;
+		mmc->f_min = mmc->f_max / 512;
+	}
+
+	/*
+	 * Check the sanity of mmc->f_min to prevent tmio_mmc_set_clock() from
+	 * looping forever...
+	 */
+	if (mmc->f_min == 0)
+		return -EINVAL;
+
+	/*
+	 * While using internal tmio hardware logic for card detection, we need
+	 * to ensure it stays powered for it to work.
+	 */
+	if (_host->native_hotplug)
+		pm_runtime_get_noresume(&pdev->dev);
+
+	tmio_mmc_clk_stop(_host);
+	tmio_mmc_reset(_host);
+
+	_host->sdcard_irq_mask = sd_ctrl_read16_and_16_as_32(_host, CTL_IRQ_MASK);
+	tmio_mmc_disable_mmc_irqs(_host, TMIO_MASK_ALL);
+
+	/* Unmask the IRQs we want to know about */
+	if (!_host->chan_rx)
+		irq_mask |= TMIO_MASK_READOP;
+	if (!_host->chan_tx)
+		irq_mask |= TMIO_MASK_WRITEOP;
+	if (!_host->native_hotplug)
+		irq_mask &= ~(TMIO_STAT_CARD_REMOVE | TMIO_STAT_CARD_INSERT);
+
+	_host->sdcard_irq_mask &= ~irq_mask;
+
+	_host->sdio_irq_enabled = false;
+	if (pdata->flags & TMIO_MMC_SDIO_IRQ) {
+		_host->sdio_irq_mask = TMIO_SDIO_MASK_ALL;
+		sd_ctrl_write16(_host, CTL_SDIO_IRQ_MASK, _host->sdio_irq_mask);
+		sd_ctrl_write16(_host, CTL_TRANSACTION_CTL, 0x0001);
+	}
+
+	spin_lock_init(&_host->lock);
+	mutex_init(&_host->ios_lock);
+
+	/* Init delayed work for request timeouts */
+	INIT_DELAYED_WORK(&_host->delayed_reset_work, tmio_mmc_reset_work);
+	INIT_WORK(&_host->done, tmio_mmc_done_work);
+
+	/* See if we also get DMA */
+	_host->dma_ops = dma_ops;
+	tmio_mmc_request_dma(_host, pdata);
+
+	pm_runtime_set_active(&pdev->dev);
+	pm_runtime_set_autosuspend_delay(&pdev->dev, 50);
+	pm_runtime_use_autosuspend(&pdev->dev);
+	pm_runtime_enable(&pdev->dev);
+
+	ret = mmc_add_host(mmc);
+	if (ret < 0) {
+		tmio_mmc_host_remove(_host);
+		return ret;
+	}
+
+	dev_pm_qos_expose_latency_limit(&pdev->dev, 100);
+
+	if (pdata->flags & TMIO_MMC_USE_GPIO_CD) {
+		ret = mmc_gpio_request_cd(mmc, pdata->cd_gpio, 0);
+		if (ret < 0) {
+			tmio_mmc_host_remove(_host);
+			return ret;
+		}
+		mmc_gpiod_request_cd_irq(mmc);
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL(tmio_mmc_host_probe);
+
+void tmio_mmc_host_remove(struct tmio_mmc_host *host)
+{
+	struct platform_device *pdev = host->pdev;
+	struct mmc_host *mmc = host->mmc;
+
+	if (host->pdata->flags & TMIO_MMC_SDIO_IRQ)
+		sd_ctrl_write16(host, CTL_TRANSACTION_CTL, 0x0000);
+
+	if (!host->native_hotplug)
+		pm_runtime_get_sync(&pdev->dev);
+
+	dev_pm_qos_hide_latency_limit(&pdev->dev);
+
+	mmc_remove_host(mmc);
+	cancel_work_sync(&host->done);
+	cancel_delayed_work_sync(&host->delayed_reset_work);
+	tmio_mmc_release_dma(host);
+
+	pm_runtime_put_sync(&pdev->dev);
+	pm_runtime_disable(&pdev->dev);
+
+	tmio_mmc_clk_disable(host);
+}
+EXPORT_SYMBOL(tmio_mmc_host_remove);
+
+#ifdef CONFIG_PM
+int tmio_mmc_host_runtime_suspend(struct device *dev)
+{
+	struct mmc_host *mmc = dev_get_drvdata(dev);
+	struct tmio_mmc_host *host = mmc_priv(mmc);
+
+	tmio_mmc_disable_mmc_irqs(host, TMIO_MASK_ALL);
+
+	if (host->clk_cache)
+		tmio_mmc_clk_stop(host);
+
+	tmio_mmc_clk_disable(host);
+
+	return 0;
+}
+EXPORT_SYMBOL(tmio_mmc_host_runtime_suspend);
+
+static bool tmio_mmc_can_retune(struct tmio_mmc_host *host)
+{
+	return host->tap_num && mmc_can_retune(host->mmc);
+}
+
+int tmio_mmc_host_runtime_resume(struct device *dev)
+{
+	struct mmc_host *mmc = dev_get_drvdata(dev);
+	struct tmio_mmc_host *host = mmc_priv(mmc);
+
+	tmio_mmc_reset(host);
+	tmio_mmc_clk_enable(host);
+
+	if (host->clk_cache)
+		tmio_mmc_set_clock(host, host->clk_cache);
+
+	tmio_mmc_enable_dma(host, true);
+
+	if (tmio_mmc_can_retune(host) && host->select_tuning(host))
+		dev_warn(&host->pdev->dev, "Tuning selection failed\n");
+
+	return 0;
+}
+EXPORT_SYMBOL(tmio_mmc_host_runtime_resume);
+#endif
+
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/mmc/host/tmio_mmc_pio.c b/drivers/mmc/host/tmio_mmc_pio.c
deleted file mode 100644
index 8ab58ca..0000000
--- a/drivers/mmc/host/tmio_mmc_pio.c
+++ /dev/null
@@ -1,1394 +0,0 @@
-/*
- * Driver for the MMC / SD / SDIO IP found in:
- *
- * TC6393XB, TC6391XB, TC6387XB, T7L66XB, ASIC3, SH-Mobile SoCs
- *
- * Copyright (C) 2016 Sang Engineering, Wolfram Sang
- * Copyright (C) 2015-16 Renesas Electronics Corporation
- * Copyright (C) 2011 Guennadi Liakhovetski
- * Copyright (C) 2007 Ian Molton
- * Copyright (C) 2004 Ian Molton
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * This driver draws mainly on scattered spec sheets, Reverse engineering
- * of the toshiba e800  SD driver and some parts of the 2.4 ASIC3 driver (4 bit
- * support). (Further 4 bit support from a later datasheet).
- *
- * TODO:
- *   Investigate using a workqueue for PIO transfers
- *   Eliminate FIXMEs
- *   Better Power management
- *   Handle MMC errors better
- *   double buffer support
- *
- */
-
-#include <linux/delay.h>
-#include <linux/device.h>
-#include <linux/highmem.h>
-#include <linux/interrupt.h>
-#include <linux/io.h>
-#include <linux/irq.h>
-#include <linux/mfd/tmio.h>
-#include <linux/mmc/card.h>
-#include <linux/mmc/host.h>
-#include <linux/mmc/mmc.h>
-#include <linux/mmc/slot-gpio.h>
-#include <linux/module.h>
-#include <linux/pagemap.h>
-#include <linux/platform_device.h>
-#include <linux/pm_qos.h>
-#include <linux/pm_runtime.h>
-#include <linux/regulator/consumer.h>
-#include <linux/mmc/sdio.h>
-#include <linux/scatterlist.h>
-#include <linux/spinlock.h>
-#include <linux/workqueue.h>
-
-#include "tmio_mmc.h"
-
-static inline void tmio_mmc_start_dma(struct tmio_mmc_host *host,
-				      struct mmc_data *data)
-{
-	if (host->dma_ops)
-		host->dma_ops->start(host, data);
-}
-
-static inline void tmio_mmc_enable_dma(struct tmio_mmc_host *host, bool enable)
-{
-	if (host->dma_ops)
-		host->dma_ops->enable(host, enable);
-}
-
-static inline void tmio_mmc_request_dma(struct tmio_mmc_host *host,
-					struct tmio_mmc_data *pdata)
-{
-	if (host->dma_ops) {
-		host->dma_ops->request(host, pdata);
-	} else {
-		host->chan_tx = NULL;
-		host->chan_rx = NULL;
-	}
-}
-
-static inline void tmio_mmc_release_dma(struct tmio_mmc_host *host)
-{
-	if (host->dma_ops)
-		host->dma_ops->release(host);
-}
-
-static inline void tmio_mmc_abort_dma(struct tmio_mmc_host *host)
-{
-	if (host->dma_ops)
-		host->dma_ops->abort(host);
-}
-
-void tmio_mmc_enable_mmc_irqs(struct tmio_mmc_host *host, u32 i)
-{
-	host->sdcard_irq_mask &= ~(i & TMIO_MASK_IRQ);
-	sd_ctrl_write32_as_16_and_16(host, CTL_IRQ_MASK, host->sdcard_irq_mask);
-}
-EXPORT_SYMBOL(tmio_mmc_enable_mmc_irqs);
-
-void tmio_mmc_disable_mmc_irqs(struct tmio_mmc_host *host, u32 i)
-{
-	host->sdcard_irq_mask |= (i & TMIO_MASK_IRQ);
-	sd_ctrl_write32_as_16_and_16(host, CTL_IRQ_MASK, host->sdcard_irq_mask);
-}
-EXPORT_SYMBOL(tmio_mmc_disable_mmc_irqs);
-
-static void tmio_mmc_ack_mmc_irqs(struct tmio_mmc_host *host, u32 i)
-{
-	sd_ctrl_write32_as_16_and_16(host, CTL_STATUS, ~i);
-}
-
-static void tmio_mmc_init_sg(struct tmio_mmc_host *host, struct mmc_data *data)
-{
-	host->sg_len = data->sg_len;
-	host->sg_ptr = data->sg;
-	host->sg_orig = data->sg;
-	host->sg_off = 0;
-}
-
-static int tmio_mmc_next_sg(struct tmio_mmc_host *host)
-{
-	host->sg_ptr = sg_next(host->sg_ptr);
-	host->sg_off = 0;
-	return --host->sg_len;
-}
-
-#define CMDREQ_TIMEOUT	5000
-
-#ifdef CONFIG_MMC_DEBUG
-
-#define STATUS_TO_TEXT(a, status, i) \
-	do { \
-		if (status & TMIO_STAT_##a) { \
-			if (i++) \
-				printk(" | "); \
-			printk(#a); \
-		} \
-	} while (0)
-
-static void pr_debug_status(u32 status)
-{
-	int i = 0;
-	pr_debug("status: %08x = ", status);
-	STATUS_TO_TEXT(CARD_REMOVE, status, i);
-	STATUS_TO_TEXT(CARD_INSERT, status, i);
-	STATUS_TO_TEXT(SIGSTATE, status, i);
-	STATUS_TO_TEXT(WRPROTECT, status, i);
-	STATUS_TO_TEXT(CARD_REMOVE_A, status, i);
-	STATUS_TO_TEXT(CARD_INSERT_A, status, i);
-	STATUS_TO_TEXT(SIGSTATE_A, status, i);
-	STATUS_TO_TEXT(CMD_IDX_ERR, status, i);
-	STATUS_TO_TEXT(STOPBIT_ERR, status, i);
-	STATUS_TO_TEXT(ILL_FUNC, status, i);
-	STATUS_TO_TEXT(CMD_BUSY, status, i);
-	STATUS_TO_TEXT(CMDRESPEND, status, i);
-	STATUS_TO_TEXT(DATAEND, status, i);
-	STATUS_TO_TEXT(CRCFAIL, status, i);
-	STATUS_TO_TEXT(DATATIMEOUT, status, i);
-	STATUS_TO_TEXT(CMDTIMEOUT, status, i);
-	STATUS_TO_TEXT(RXOVERFLOW, status, i);
-	STATUS_TO_TEXT(TXUNDERRUN, status, i);
-	STATUS_TO_TEXT(RXRDY, status, i);
-	STATUS_TO_TEXT(TXRQ, status, i);
-	STATUS_TO_TEXT(ILL_ACCESS, status, i);
-	printk("\n");
-}
-
-#else
-#define pr_debug_status(s)  do { } while (0)
-#endif
-
-static void tmio_mmc_enable_sdio_irq(struct mmc_host *mmc, int enable)
-{
-	struct tmio_mmc_host *host = mmc_priv(mmc);
-
-	if (enable && !host->sdio_irq_enabled) {
-		u16 sdio_status;
-
-		/* Keep device active while SDIO irq is enabled */
-		pm_runtime_get_sync(mmc_dev(mmc));
-
-		host->sdio_irq_enabled = true;
-		host->sdio_irq_mask = TMIO_SDIO_MASK_ALL &
-					~TMIO_SDIO_STAT_IOIRQ;
-
-		/* Clear obsolete interrupts before enabling */
-		sdio_status = sd_ctrl_read16(host, CTL_SDIO_STATUS) & ~TMIO_SDIO_MASK_ALL;
-		if (host->pdata->flags & TMIO_MMC_SDIO_STATUS_SETBITS)
-			sdio_status |= TMIO_SDIO_SETBITS_MASK;
-		sd_ctrl_write16(host, CTL_SDIO_STATUS, sdio_status);
-
-		sd_ctrl_write16(host, CTL_SDIO_IRQ_MASK, host->sdio_irq_mask);
-	} else if (!enable && host->sdio_irq_enabled) {
-		host->sdio_irq_mask = TMIO_SDIO_MASK_ALL;
-		sd_ctrl_write16(host, CTL_SDIO_IRQ_MASK, host->sdio_irq_mask);
-
-		host->sdio_irq_enabled = false;
-		pm_runtime_mark_last_busy(mmc_dev(mmc));
-		pm_runtime_put_autosuspend(mmc_dev(mmc));
-	}
-}
-
-static void tmio_mmc_clk_start(struct tmio_mmc_host *host)
-{
-	sd_ctrl_write16(host, CTL_SD_CARD_CLK_CTL, CLK_CTL_SCLKEN |
-		sd_ctrl_read16(host, CTL_SD_CARD_CLK_CTL));
-	msleep(host->pdata->flags & TMIO_MMC_MIN_RCAR2 ? 1 : 10);
-
-	if (host->pdata->flags & TMIO_MMC_HAVE_HIGH_REG) {
-		sd_ctrl_write16(host, CTL_CLK_AND_WAIT_CTL, 0x0100);
-		msleep(10);
-	}
-}
-
-static void tmio_mmc_clk_stop(struct tmio_mmc_host *host)
-{
-	if (host->pdata->flags & TMIO_MMC_HAVE_HIGH_REG) {
-		sd_ctrl_write16(host, CTL_CLK_AND_WAIT_CTL, 0x0000);
-		msleep(10);
-	}
-
-	sd_ctrl_write16(host, CTL_SD_CARD_CLK_CTL, ~CLK_CTL_SCLKEN &
-		sd_ctrl_read16(host, CTL_SD_CARD_CLK_CTL));
-	msleep(host->pdata->flags & TMIO_MMC_MIN_RCAR2 ? 5 : 10);
-}
-
-static void tmio_mmc_set_clock(struct tmio_mmc_host *host,
-				unsigned int new_clock)
-{
-	u32 clk = 0, clock;
-
-	if (new_clock == 0) {
-		tmio_mmc_clk_stop(host);
-		return;
-	}
-
-	if (host->clk_update)
-		clock = host->clk_update(host, new_clock) / 512;
-	else
-		clock = host->mmc->f_min;
-
-	for (clk = 0x80000080; new_clock >= (clock << 1); clk >>= 1)
-		clock <<= 1;
-
-	/* 1/1 clock is option */
-	if ((host->pdata->flags & TMIO_MMC_CLK_ACTUAL) && ((clk >> 22) & 0x1))
-		clk |= 0xff;
-
-	if (host->set_clk_div)
-		host->set_clk_div(host->pdev, (clk >> 22) & 1);
-
-	sd_ctrl_write16(host, CTL_SD_CARD_CLK_CTL, ~CLK_CTL_SCLKEN &
-			sd_ctrl_read16(host, CTL_SD_CARD_CLK_CTL));
-	sd_ctrl_write16(host, CTL_SD_CARD_CLK_CTL, clk & CLK_CTL_DIV_MASK);
-	if (!(host->pdata->flags & TMIO_MMC_MIN_RCAR2))
-		msleep(10);
-
-	tmio_mmc_clk_start(host);
-}
-
-static void tmio_mmc_reset(struct tmio_mmc_host *host)
-{
-	/* FIXME - should we set stop clock reg here */
-	sd_ctrl_write16(host, CTL_RESET_SD, 0x0000);
-	if (host->pdata->flags & TMIO_MMC_HAVE_HIGH_REG)
-		sd_ctrl_write16(host, CTL_RESET_SDIO, 0x0000);
-	msleep(10);
-	sd_ctrl_write16(host, CTL_RESET_SD, 0x0001);
-	if (host->pdata->flags & TMIO_MMC_HAVE_HIGH_REG)
-		sd_ctrl_write16(host, CTL_RESET_SDIO, 0x0001);
-	msleep(10);
-}
-
-static void tmio_mmc_reset_work(struct work_struct *work)
-{
-	struct tmio_mmc_host *host = container_of(work, struct tmio_mmc_host,
-						  delayed_reset_work.work);
-	struct mmc_request *mrq;
-	unsigned long flags;
-
-	spin_lock_irqsave(&host->lock, flags);
-	mrq = host->mrq;
-
-	/*
-	 * is request already finished? Since we use a non-blocking
-	 * cancel_delayed_work(), it can happen, that a .set_ios() call preempts
-	 * us, so, have to check for IS_ERR(host->mrq)
-	 */
-	if (IS_ERR_OR_NULL(mrq)
-	    || time_is_after_jiffies(host->last_req_ts +
-		msecs_to_jiffies(CMDREQ_TIMEOUT))) {
-		spin_unlock_irqrestore(&host->lock, flags);
-		return;
-	}
-
-	dev_warn(&host->pdev->dev,
-		"timeout waiting for hardware interrupt (CMD%u)\n",
-		mrq->cmd->opcode);
-
-	if (host->data)
-		host->data->error = -ETIMEDOUT;
-	else if (host->cmd)
-		host->cmd->error = -ETIMEDOUT;
-	else
-		mrq->cmd->error = -ETIMEDOUT;
-
-	host->cmd = NULL;
-	host->data = NULL;
-	host->force_pio = false;
-
-	spin_unlock_irqrestore(&host->lock, flags);
-
-	tmio_mmc_reset(host);
-
-	/* Ready for new calls */
-	host->mrq = NULL;
-
-	tmio_mmc_abort_dma(host);
-	mmc_request_done(host->mmc, mrq);
-}
-
-/* called with host->lock held, interrupts disabled */
-static void tmio_mmc_finish_request(struct tmio_mmc_host *host)
-{
-	struct mmc_request *mrq;
-	unsigned long flags;
-
-	spin_lock_irqsave(&host->lock, flags);
-
-	mrq = host->mrq;
-	if (IS_ERR_OR_NULL(mrq)) {
-		spin_unlock_irqrestore(&host->lock, flags);
-		return;
-	}
-
-	host->cmd = NULL;
-	host->data = NULL;
-	host->force_pio = false;
-
-	cancel_delayed_work(&host->delayed_reset_work);
-
-	host->mrq = NULL;
-	spin_unlock_irqrestore(&host->lock, flags);
-
-	if (mrq->cmd->error || (mrq->data && mrq->data->error))
-		tmio_mmc_abort_dma(host);
-
-	if (host->check_scc_error)
-		host->check_scc_error(host);
-
-	mmc_request_done(host->mmc, mrq);
-}
-
-static void tmio_mmc_done_work(struct work_struct *work)
-{
-	struct tmio_mmc_host *host = container_of(work, struct tmio_mmc_host,
-						  done);
-	tmio_mmc_finish_request(host);
-}
-
-/* These are the bitmasks the tmio chip requires to implement the MMC response
- * types. Note that R1 and R6 are the same in this scheme. */
-#define APP_CMD        0x0040
-#define RESP_NONE      0x0300
-#define RESP_R1        0x0400
-#define RESP_R1B       0x0500
-#define RESP_R2        0x0600
-#define RESP_R3        0x0700
-#define DATA_PRESENT   0x0800
-#define TRANSFER_READ  0x1000
-#define TRANSFER_MULTI 0x2000
-#define SECURITY_CMD   0x4000
-#define NO_CMD12_ISSUE 0x4000 /* TMIO_MMC_HAVE_CMD12_CTRL */
-
-static int tmio_mmc_start_command(struct tmio_mmc_host *host, struct mmc_command *cmd)
-{
-	struct mmc_data *data = host->data;
-	int c = cmd->opcode;
-	u32 irq_mask = TMIO_MASK_CMD;
-
-	/* CMD12 is handled by hardware */
-	if (cmd->opcode == MMC_STOP_TRANSMISSION && !cmd->arg) {
-		sd_ctrl_write16(host, CTL_STOP_INTERNAL_ACTION, TMIO_STOP_STP);
-		return 0;
-	}
-
-	switch (mmc_resp_type(cmd)) {
-	case MMC_RSP_NONE: c |= RESP_NONE; break;
-	case MMC_RSP_R1:
-	case MMC_RSP_R1_NO_CRC:
-			   c |= RESP_R1;   break;
-	case MMC_RSP_R1B:  c |= RESP_R1B;  break;
-	case MMC_RSP_R2:   c |= RESP_R2;   break;
-	case MMC_RSP_R3:   c |= RESP_R3;   break;
-	default:
-		pr_debug("Unknown response type %d\n", mmc_resp_type(cmd));
-		return -EINVAL;
-	}
-
-	host->cmd = cmd;
-
-/* FIXME - this seems to be ok commented out but the spec suggest this bit
- *         should be set when issuing app commands.
- *	if(cmd->flags & MMC_FLAG_ACMD)
- *		c |= APP_CMD;
- */
-	if (data) {
-		c |= DATA_PRESENT;
-		if (data->blocks > 1) {
-			sd_ctrl_write16(host, CTL_STOP_INTERNAL_ACTION, TMIO_STOP_SEC);
-			c |= TRANSFER_MULTI;
-
-			/*
-			 * Disable auto CMD12 at IO_RW_EXTENDED when
-			 * multiple block transfer
-			 */
-			if ((host->pdata->flags & TMIO_MMC_HAVE_CMD12_CTRL) &&
-			    (cmd->opcode == SD_IO_RW_EXTENDED))
-				c |= NO_CMD12_ISSUE;
-		}
-		if (data->flags & MMC_DATA_READ)
-			c |= TRANSFER_READ;
-	}
-
-	if (!host->native_hotplug)
-		irq_mask &= ~(TMIO_STAT_CARD_REMOVE | TMIO_STAT_CARD_INSERT);
-	tmio_mmc_enable_mmc_irqs(host, irq_mask);
-
-	/* Fire off the command */
-	sd_ctrl_write32_as_16_and_16(host, CTL_ARG_REG, cmd->arg);
-	sd_ctrl_write16(host, CTL_SD_CMD, c);
-
-	return 0;
-}
-
-static void tmio_mmc_transfer_data(struct tmio_mmc_host *host,
-				   unsigned short *buf,
-				   unsigned int count)
-{
-	int is_read = host->data->flags & MMC_DATA_READ;
-	u8  *buf8;
-
-	/*
-	 * Transfer the data
-	 */
-	if (host->pdata->flags & TMIO_MMC_32BIT_DATA_PORT) {
-		u8 data[4] = { };
-
-		if (is_read)
-			sd_ctrl_read32_rep(host, CTL_SD_DATA_PORT, (u32 *)buf,
-					   count >> 2);
-		else
-			sd_ctrl_write32_rep(host, CTL_SD_DATA_PORT, (u32 *)buf,
-					    count >> 2);
-
-		/* if count was multiple of 4 */
-		if (!(count & 0x3))
-			return;
-
-		buf8 = (u8 *)(buf + (count >> 2));
-		count %= 4;
-
-		if (is_read) {
-			sd_ctrl_read32_rep(host, CTL_SD_DATA_PORT,
-					   (u32 *)data, 1);
-			memcpy(buf8, data, count);
-		} else {
-			memcpy(data, buf8, count);
-			sd_ctrl_write32_rep(host, CTL_SD_DATA_PORT,
-					    (u32 *)data, 1);
-		}
-
-		return;
-	}
-
-	if (is_read)
-		sd_ctrl_read16_rep(host, CTL_SD_DATA_PORT, buf, count >> 1);
-	else
-		sd_ctrl_write16_rep(host, CTL_SD_DATA_PORT, buf, count >> 1);
-
-	/* if count was even number */
-	if (!(count & 0x1))
-		return;
-
-	/* if count was odd number */
-	buf8 = (u8 *)(buf + (count >> 1));
-
-	/*
-	 * FIXME
-	 *
-	 * driver and this function are assuming that
-	 * it is used as little endian
-	 */
-	if (is_read)
-		*buf8 = sd_ctrl_read16(host, CTL_SD_DATA_PORT) & 0xff;
-	else
-		sd_ctrl_write16(host, CTL_SD_DATA_PORT, *buf8);
-}
-
-/*
- * This chip always returns (at least?) as much data as you ask for.
- * I'm unsure what happens if you ask for less than a block. This should be
- * looked into to ensure that a funny length read doesn't hose the controller.
- */
-static void tmio_mmc_pio_irq(struct tmio_mmc_host *host)
-{
-	struct mmc_data *data = host->data;
-	void *sg_virt;
-	unsigned short *buf;
-	unsigned int count;
-	unsigned long flags;
-
-	if ((host->chan_tx || host->chan_rx) && !host->force_pio) {
-		pr_err("PIO IRQ in DMA mode!\n");
-		return;
-	} else if (!data) {
-		pr_debug("Spurious PIO IRQ\n");
-		return;
-	}
-
-	sg_virt = tmio_mmc_kmap_atomic(host->sg_ptr, &flags);
-	buf = (unsigned short *)(sg_virt + host->sg_off);
-
-	count = host->sg_ptr->length - host->sg_off;
-	if (count > data->blksz)
-		count = data->blksz;
-
-	pr_debug("count: %08x offset: %08x flags %08x\n",
-		 count, host->sg_off, data->flags);
-
-	/* Transfer the data */
-	tmio_mmc_transfer_data(host, buf, count);
-
-	host->sg_off += count;
-
-	tmio_mmc_kunmap_atomic(host->sg_ptr, &flags, sg_virt);
-
-	if (host->sg_off == host->sg_ptr->length)
-		tmio_mmc_next_sg(host);
-
-	return;
-}
-
-static void tmio_mmc_check_bounce_buffer(struct tmio_mmc_host *host)
-{
-	if (host->sg_ptr == &host->bounce_sg) {
-		unsigned long flags;
-		void *sg_vaddr = tmio_mmc_kmap_atomic(host->sg_orig, &flags);
-		memcpy(sg_vaddr, host->bounce_buf, host->bounce_sg.length);
-		tmio_mmc_kunmap_atomic(host->sg_orig, &flags, sg_vaddr);
-	}
-}
-
-/* needs to be called with host->lock held */
-void tmio_mmc_do_data_irq(struct tmio_mmc_host *host)
-{
-	struct mmc_data *data = host->data;
-	struct mmc_command *stop;
-
-	host->data = NULL;
-
-	if (!data) {
-		dev_warn(&host->pdev->dev, "Spurious data end IRQ\n");
-		return;
-	}
-	stop = data->stop;
-
-	/* FIXME - return correct transfer count on errors */
-	if (!data->error)
-		data->bytes_xfered = data->blocks * data->blksz;
-	else
-		data->bytes_xfered = 0;
-
-	pr_debug("Completed data request\n");
-
-	/*
-	 * FIXME: other drivers allow an optional stop command of any given type
-	 *        which we dont do, as the chip can auto generate them.
-	 *        Perhaps we can be smarter about when to use auto CMD12 and
-	 *        only issue the auto request when we know this is the desired
-	 *        stop command, allowing fallback to the stop command the
-	 *        upper layers expect. For now, we do what works.
-	 */
-
-	if (data->flags & MMC_DATA_READ) {
-		if (host->chan_rx && !host->force_pio)
-			tmio_mmc_check_bounce_buffer(host);
-		dev_dbg(&host->pdev->dev, "Complete Rx request %p\n",
-			host->mrq);
-	} else {
-		dev_dbg(&host->pdev->dev, "Complete Tx request %p\n",
-			host->mrq);
-	}
-
-	if (stop) {
-		if (stop->opcode != MMC_STOP_TRANSMISSION || stop->arg)
-			dev_err(&host->pdev->dev, "unsupported stop: CMD%u,0x%x. We did CMD12,0\n",
-				stop->opcode, stop->arg);
-
-		/* fill in response from auto CMD12 */
-		stop->resp[0] = sd_ctrl_read16_and_16_as_32(host, CTL_RESPONSE);
-
-		sd_ctrl_write16(host, CTL_STOP_INTERNAL_ACTION, 0);
-	}
-
-	schedule_work(&host->done);
-}
-EXPORT_SYMBOL(tmio_mmc_do_data_irq);
-
-static void tmio_mmc_data_irq(struct tmio_mmc_host *host, unsigned int stat)
-{
-	struct mmc_data *data;
-	spin_lock(&host->lock);
-	data = host->data;
-
-	if (!data)
-		goto out;
-
-	if (stat & TMIO_STAT_CRCFAIL || stat & TMIO_STAT_STOPBIT_ERR ||
-	    stat & TMIO_STAT_TXUNDERRUN)
-		data->error = -EILSEQ;
-	if (host->chan_tx && (data->flags & MMC_DATA_WRITE) && !host->force_pio) {
-		u32 status = sd_ctrl_read16_and_16_as_32(host, CTL_STATUS);
-		bool done = false;
-
-		/*
-		 * Has all data been written out yet? Testing on SuperH showed,
-		 * that in most cases the first interrupt comes already with the
-		 * BUSY status bit clear, but on some operations, like mount or
-		 * in the beginning of a write / sync / umount, there is one
-		 * DATAEND interrupt with the BUSY bit set, in this cases
-		 * waiting for one more interrupt fixes the problem.
-		 */
-		if (host->pdata->flags & TMIO_MMC_HAS_IDLE_WAIT) {
-			if (status & TMIO_STAT_SCLKDIVEN)
-				done = true;
-		} else {
-			if (!(status & TMIO_STAT_CMD_BUSY))
-				done = true;
-		}
-
-		if (done) {
-			tmio_mmc_disable_mmc_irqs(host, TMIO_STAT_DATAEND);
-			complete(&host->dma_dataend);
-		}
-	} else if (host->chan_rx && (data->flags & MMC_DATA_READ) && !host->force_pio) {
-		tmio_mmc_disable_mmc_irqs(host, TMIO_STAT_DATAEND);
-		complete(&host->dma_dataend);
-	} else {
-		tmio_mmc_do_data_irq(host);
-		tmio_mmc_disable_mmc_irqs(host, TMIO_MASK_READOP | TMIO_MASK_WRITEOP);
-	}
-out:
-	spin_unlock(&host->lock);
-}
-
-static void tmio_mmc_cmd_irq(struct tmio_mmc_host *host,
-	unsigned int stat)
-{
-	struct mmc_command *cmd = host->cmd;
-	int i, addr;
-
-	spin_lock(&host->lock);
-
-	if (!host->cmd) {
-		pr_debug("Spurious CMD irq\n");
-		goto out;
-	}
-
-	/* This controller is sicker than the PXA one. Not only do we need to
-	 * drop the top 8 bits of the first response word, we also need to
-	 * modify the order of the response for short response command types.
-	 */
-
-	for (i = 3, addr = CTL_RESPONSE ; i >= 0 ; i--, addr += 4)
-		cmd->resp[i] = sd_ctrl_read16_and_16_as_32(host, addr);
-
-	if (cmd->flags &  MMC_RSP_136) {
-		cmd->resp[0] = (cmd->resp[0] << 8) | (cmd->resp[1] >> 24);
-		cmd->resp[1] = (cmd->resp[1] << 8) | (cmd->resp[2] >> 24);
-		cmd->resp[2] = (cmd->resp[2] << 8) | (cmd->resp[3] >> 24);
-		cmd->resp[3] <<= 8;
-	} else if (cmd->flags & MMC_RSP_R3) {
-		cmd->resp[0] = cmd->resp[3];
-	}
-
-	if (stat & TMIO_STAT_CMDTIMEOUT)
-		cmd->error = -ETIMEDOUT;
-	else if ((stat & TMIO_STAT_CRCFAIL && cmd->flags & MMC_RSP_CRC) ||
-		 stat & TMIO_STAT_STOPBIT_ERR ||
-		 stat & TMIO_STAT_CMD_IDX_ERR)
-		cmd->error = -EILSEQ;
-
-	/* If there is data to handle we enable data IRQs here, and
-	 * we will ultimatley finish the request in the data_end handler.
-	 * If theres no data or we encountered an error, finish now.
-	 */
-	if (host->data && (!cmd->error || cmd->error == -EILSEQ)) {
-		if (host->data->flags & MMC_DATA_READ) {
-			if (host->force_pio || !host->chan_rx)
-				tmio_mmc_enable_mmc_irqs(host, TMIO_MASK_READOP);
-			else
-				tasklet_schedule(&host->dma_issue);
-		} else {
-			if (host->force_pio || !host->chan_tx)
-				tmio_mmc_enable_mmc_irqs(host, TMIO_MASK_WRITEOP);
-			else
-				tasklet_schedule(&host->dma_issue);
-		}
-	} else {
-		schedule_work(&host->done);
-	}
-
-out:
-	spin_unlock(&host->lock);
-}
-
-static bool __tmio_mmc_card_detect_irq(struct tmio_mmc_host *host,
-				      int ireg, int status)
-{
-	struct mmc_host *mmc = host->mmc;
-
-	/* Card insert / remove attempts */
-	if (ireg & (TMIO_STAT_CARD_INSERT | TMIO_STAT_CARD_REMOVE)) {
-		tmio_mmc_ack_mmc_irqs(host, TMIO_STAT_CARD_INSERT |
-			TMIO_STAT_CARD_REMOVE);
-		if ((((ireg & TMIO_STAT_CARD_REMOVE) && mmc->card) ||
-		     ((ireg & TMIO_STAT_CARD_INSERT) && !mmc->card)) &&
-		    !work_pending(&mmc->detect.work))
-			mmc_detect_change(host->mmc, msecs_to_jiffies(100));
-		return true;
-	}
-
-	return false;
-}
-
-static bool __tmio_mmc_sdcard_irq(struct tmio_mmc_host *host,
-				 int ireg, int status)
-{
-	/* Command completion */
-	if (ireg & (TMIO_STAT_CMDRESPEND | TMIO_STAT_CMDTIMEOUT)) {
-		tmio_mmc_ack_mmc_irqs(host,
-			     TMIO_STAT_CMDRESPEND |
-			     TMIO_STAT_CMDTIMEOUT);
-		tmio_mmc_cmd_irq(host, status);
-		return true;
-	}
-
-	/* Data transfer */
-	if (ireg & (TMIO_STAT_RXRDY | TMIO_STAT_TXRQ)) {
-		tmio_mmc_ack_mmc_irqs(host, TMIO_STAT_RXRDY | TMIO_STAT_TXRQ);
-		tmio_mmc_pio_irq(host);
-		return true;
-	}
-
-	/* Data transfer completion */
-	if (ireg & TMIO_STAT_DATAEND) {
-		tmio_mmc_ack_mmc_irqs(host, TMIO_STAT_DATAEND);
-		tmio_mmc_data_irq(host, status);
-		return true;
-	}
-
-	return false;
-}
-
-static bool __tmio_mmc_sdio_irq(int irq, void *devid)
-{
-	struct tmio_mmc_host *host = devid;
-	struct mmc_host *mmc = host->mmc;
-	struct tmio_mmc_data *pdata = host->pdata;
-	unsigned int ireg, status;
-	unsigned int sdio_status;
-
-	if (!(pdata->flags & TMIO_MMC_SDIO_IRQ))
-		return false;
-
-	status = sd_ctrl_read16(host, CTL_SDIO_STATUS);
-	ireg = status & TMIO_SDIO_MASK_ALL & ~host->sdio_irq_mask;
-
-	sdio_status = status & ~TMIO_SDIO_MASK_ALL;
-	if (pdata->flags & TMIO_MMC_SDIO_STATUS_SETBITS)
-		sdio_status |= TMIO_SDIO_SETBITS_MASK;
-
-	sd_ctrl_write16(host, CTL_SDIO_STATUS, sdio_status);
-
-	if (mmc->caps & MMC_CAP_SDIO_IRQ && ireg & TMIO_SDIO_STAT_IOIRQ)
-		mmc_signal_sdio_irq(mmc);
-
-	return ireg;
-}
-
-irqreturn_t tmio_mmc_irq(int irq, void *devid)
-{
-	struct tmio_mmc_host *host = devid;
-	unsigned int ireg, status;
-
-	status = sd_ctrl_read16_and_16_as_32(host, CTL_STATUS);
-	ireg = status & TMIO_MASK_IRQ & ~host->sdcard_irq_mask;
-
-	pr_debug_status(status);
-	pr_debug_status(ireg);
-
-	/* Clear the status except the interrupt status */
-	sd_ctrl_write32_as_16_and_16(host, CTL_STATUS, TMIO_MASK_IRQ);
-
-	if (__tmio_mmc_card_detect_irq(host, ireg, status))
-		return IRQ_HANDLED;
-	if (__tmio_mmc_sdcard_irq(host, ireg, status))
-		return IRQ_HANDLED;
-
-	if (__tmio_mmc_sdio_irq(irq, devid))
-		return IRQ_HANDLED;
-
-	return IRQ_NONE;
-}
-EXPORT_SYMBOL(tmio_mmc_irq);
-
-static int tmio_mmc_start_data(struct tmio_mmc_host *host,
-	struct mmc_data *data)
-{
-	struct tmio_mmc_data *pdata = host->pdata;
-
-	pr_debug("setup data transfer: blocksize %08x  nr_blocks %d\n",
-		 data->blksz, data->blocks);
-
-	/* Some hardware cannot perform 2 byte requests in 4/8 bit mode */
-	if (host->mmc->ios.bus_width == MMC_BUS_WIDTH_4 ||
-	    host->mmc->ios.bus_width == MMC_BUS_WIDTH_8) {
-		int blksz_2bytes = pdata->flags & TMIO_MMC_BLKSZ_2BYTES;
-
-		if (data->blksz < 2 || (data->blksz < 4 && !blksz_2bytes)) {
-			pr_err("%s: %d byte block unsupported in 4/8 bit mode\n",
-			       mmc_hostname(host->mmc), data->blksz);
-			return -EINVAL;
-		}
-	}
-
-	tmio_mmc_init_sg(host, data);
-	host->data = data;
-
-	/* Set transfer length / blocksize */
-	sd_ctrl_write16(host, CTL_SD_XFER_LEN, data->blksz);
-	sd_ctrl_write16(host, CTL_XFER_BLK_COUNT, data->blocks);
-
-	tmio_mmc_start_dma(host, data);
-
-	return 0;
-}
-
-static void tmio_mmc_hw_reset(struct mmc_host *mmc)
-{
-	struct tmio_mmc_host *host = mmc_priv(mmc);
-
-	if (host->hw_reset)
-		host->hw_reset(host);
-}
-
-static int tmio_mmc_execute_tuning(struct mmc_host *mmc, u32 opcode)
-{
-	struct tmio_mmc_host *host = mmc_priv(mmc);
-	int i, ret = 0;
-
-	if (!host->init_tuning || !host->select_tuning)
-		/* Tuning is not supported */
-		goto out;
-
-	host->tap_num = host->init_tuning(host);
-	if (!host->tap_num)
-		/* Tuning is not supported */
-		goto out;
-
-	if (host->tap_num * 2 >= sizeof(host->taps) * BITS_PER_BYTE) {
-		dev_warn_once(&host->pdev->dev,
-		      "Too many taps, skipping tuning. Please consider updating size of taps field of tmio_mmc_host\n");
-		goto out;
-	}
-
-	bitmap_zero(host->taps, host->tap_num * 2);
-
-	/* Issue CMD19 twice for each tap */
-	for (i = 0; i < 2 * host->tap_num; i++) {
-		if (host->prepare_tuning)
-			host->prepare_tuning(host, i % host->tap_num);
-
-		ret = mmc_send_tuning(mmc, opcode, NULL);
-		if (ret && ret != -EILSEQ)
-			goto out;
-		if (ret == 0)
-			set_bit(i, host->taps);
-
-		mdelay(1);
-	}
-
-	ret = host->select_tuning(host);
-
-out:
-	if (ret < 0) {
-		dev_warn(&host->pdev->dev, "Tuning procedure failed\n");
-		tmio_mmc_hw_reset(mmc);
-	}
-
-	return ret;
-}
-
-/* Process requests from the MMC layer */
-static void tmio_mmc_request(struct mmc_host *mmc, struct mmc_request *mrq)
-{
-	struct tmio_mmc_host *host = mmc_priv(mmc);
-	unsigned long flags;
-	int ret;
-
-	spin_lock_irqsave(&host->lock, flags);
-
-	if (host->mrq) {
-		pr_debug("request not null\n");
-		if (IS_ERR(host->mrq)) {
-			spin_unlock_irqrestore(&host->lock, flags);
-			mrq->cmd->error = -EAGAIN;
-			mmc_request_done(mmc, mrq);
-			return;
-		}
-	}
-
-	host->last_req_ts = jiffies;
-	wmb();
-	host->mrq = mrq;
-
-	spin_unlock_irqrestore(&host->lock, flags);
-
-	if (mrq->data) {
-		ret = tmio_mmc_start_data(host, mrq->data);
-		if (ret)
-			goto fail;
-	}
-
-	ret = tmio_mmc_start_command(host, mrq->cmd);
-	if (!ret) {
-		schedule_delayed_work(&host->delayed_reset_work,
-				      msecs_to_jiffies(CMDREQ_TIMEOUT));
-		return;
-	}
-
-fail:
-	host->force_pio = false;
-	host->mrq = NULL;
-	mrq->cmd->error = ret;
-	mmc_request_done(mmc, mrq);
-}
-
-static int tmio_mmc_clk_enable(struct tmio_mmc_host *host)
-{
-	if (!host->clk_enable)
-		return -ENOTSUPP;
-
-	return host->clk_enable(host);
-}
-
-static void tmio_mmc_clk_disable(struct tmio_mmc_host *host)
-{
-	if (host->clk_disable)
-		host->clk_disable(host);
-}
-
-static void tmio_mmc_power_on(struct tmio_mmc_host *host, unsigned short vdd)
-{
-	struct mmc_host *mmc = host->mmc;
-	int ret = 0;
-
-	/* .set_ios() is returning void, so, no chance to report an error */
-
-	if (host->set_pwr)
-		host->set_pwr(host->pdev, 1);
-
-	if (!IS_ERR(mmc->supply.vmmc)) {
-		ret = mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, vdd);
-		/*
-		 * Attention: empiric value. With a b43 WiFi SDIO card this
-		 * delay proved necessary for reliable card-insertion probing.
-		 * 100us were not enough. Is this the same 140us delay, as in
-		 * tmio_mmc_set_ios()?
-		 */
-		udelay(200);
-	}
-	/*
-	 * It seems, VccQ should be switched on after Vcc, this is also what the
-	 * omap_hsmmc.c driver does.
-	 */
-	if (!IS_ERR(mmc->supply.vqmmc) && !ret) {
-		ret = regulator_enable(mmc->supply.vqmmc);
-		udelay(200);
-	}
-
-	if (ret < 0)
-		dev_dbg(&host->pdev->dev, "Regulators failed to power up: %d\n",
-			ret);
-}
-
-static void tmio_mmc_power_off(struct tmio_mmc_host *host)
-{
-	struct mmc_host *mmc = host->mmc;
-
-	if (!IS_ERR(mmc->supply.vqmmc))
-		regulator_disable(mmc->supply.vqmmc);
-
-	if (!IS_ERR(mmc->supply.vmmc))
-		mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, 0);
-
-	if (host->set_pwr)
-		host->set_pwr(host->pdev, 0);
-}
-
-static void tmio_mmc_set_bus_width(struct tmio_mmc_host *host,
-				unsigned char bus_width)
-{
-	u16 reg = sd_ctrl_read16(host, CTL_SD_MEM_CARD_OPT)
-				& ~(CARD_OPT_WIDTH | CARD_OPT_WIDTH8);
-
-	/* reg now applies to MMC_BUS_WIDTH_4 */
-	if (bus_width == MMC_BUS_WIDTH_1)
-		reg |= CARD_OPT_WIDTH;
-	else if (bus_width == MMC_BUS_WIDTH_8)
-		reg |= CARD_OPT_WIDTH8;
-
-	sd_ctrl_write16(host, CTL_SD_MEM_CARD_OPT, reg);
-}
-
-/* Set MMC clock / power.
- * Note: This controller uses a simple divider scheme therefore it cannot
- * run a MMC card at full speed (20MHz). The max clock is 24MHz on SD, but as
- * MMC wont run that fast, it has to be clocked at 12MHz which is the next
- * slowest setting.
- */
-static void tmio_mmc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
-{
-	struct tmio_mmc_host *host = mmc_priv(mmc);
-	struct device *dev = &host->pdev->dev;
-	unsigned long flags;
-
-	mutex_lock(&host->ios_lock);
-
-	spin_lock_irqsave(&host->lock, flags);
-	if (host->mrq) {
-		if (IS_ERR(host->mrq)) {
-			dev_dbg(dev,
-				"%s.%d: concurrent .set_ios(), clk %u, mode %u\n",
-				current->comm, task_pid_nr(current),
-				ios->clock, ios->power_mode);
-			host->mrq = ERR_PTR(-EINTR);
-		} else {
-			dev_dbg(dev,
-				"%s.%d: CMD%u active since %lu, now %lu!\n",
-				current->comm, task_pid_nr(current),
-				host->mrq->cmd->opcode, host->last_req_ts, jiffies);
-		}
-		spin_unlock_irqrestore(&host->lock, flags);
-
-		mutex_unlock(&host->ios_lock);
-		return;
-	}
-
-	host->mrq = ERR_PTR(-EBUSY);
-
-	spin_unlock_irqrestore(&host->lock, flags);
-
-	switch (ios->power_mode) {
-	case MMC_POWER_OFF:
-		tmio_mmc_power_off(host);
-		tmio_mmc_clk_stop(host);
-		break;
-	case MMC_POWER_UP:
-		tmio_mmc_power_on(host, ios->vdd);
-		tmio_mmc_set_clock(host, ios->clock);
-		tmio_mmc_set_bus_width(host, ios->bus_width);
-		break;
-	case MMC_POWER_ON:
-		tmio_mmc_set_clock(host, ios->clock);
-		tmio_mmc_set_bus_width(host, ios->bus_width);
-		break;
-	}
-
-	/* Let things settle. delay taken from winCE driver */
-	udelay(140);
-	if (PTR_ERR(host->mrq) == -EINTR)
-		dev_dbg(&host->pdev->dev,
-			"%s.%d: IOS interrupted: clk %u, mode %u",
-			current->comm, task_pid_nr(current),
-			ios->clock, ios->power_mode);
-	host->mrq = NULL;
-
-	host->clk_cache = ios->clock;
-
-	mutex_unlock(&host->ios_lock);
-}
-
-static int tmio_mmc_get_ro(struct mmc_host *mmc)
-{
-	struct tmio_mmc_host *host = mmc_priv(mmc);
-	struct tmio_mmc_data *pdata = host->pdata;
-	int ret = mmc_gpio_get_ro(mmc);
-	if (ret >= 0)
-		return ret;
-
-	ret = !((pdata->flags & TMIO_MMC_WRPROTECT_DISABLE) ||
-		(sd_ctrl_read16_and_16_as_32(host, CTL_STATUS) & TMIO_STAT_WRPROTECT));
-
-	return ret;
-}
-
-static int tmio_multi_io_quirk(struct mmc_card *card,
-			       unsigned int direction, int blk_size)
-{
-	struct tmio_mmc_host *host = mmc_priv(card->host);
-
-	if (host->multi_io_quirk)
-		return host->multi_io_quirk(card, direction, blk_size);
-
-	return blk_size;
-}
-
-static struct mmc_host_ops tmio_mmc_ops = {
-	.request	= tmio_mmc_request,
-	.set_ios	= tmio_mmc_set_ios,
-	.get_ro         = tmio_mmc_get_ro,
-	.get_cd		= mmc_gpio_get_cd,
-	.enable_sdio_irq = tmio_mmc_enable_sdio_irq,
-	.multi_io_quirk	= tmio_multi_io_quirk,
-	.hw_reset	= tmio_mmc_hw_reset,
-	.execute_tuning = tmio_mmc_execute_tuning,
-};
-
-static int tmio_mmc_init_ocr(struct tmio_mmc_host *host)
-{
-	struct tmio_mmc_data *pdata = host->pdata;
-	struct mmc_host *mmc = host->mmc;
-
-	mmc_regulator_get_supply(mmc);
-
-	/* use ocr_mask if no regulator */
-	if (!mmc->ocr_avail)
-		mmc->ocr_avail =  pdata->ocr_mask;
-
-	/*
-	 * try again.
-	 * There is possibility that regulator has not been probed
-	 */
-	if (!mmc->ocr_avail)
-		return -EPROBE_DEFER;
-
-	return 0;
-}
-
-static void tmio_mmc_of_parse(struct platform_device *pdev,
-			      struct tmio_mmc_data *pdata)
-{
-	const struct device_node *np = pdev->dev.of_node;
-	if (!np)
-		return;
-
-	if (of_get_property(np, "toshiba,mmc-wrprotect-disable", NULL))
-		pdata->flags |= TMIO_MMC_WRPROTECT_DISABLE;
-}
-
-struct tmio_mmc_host*
-tmio_mmc_host_alloc(struct platform_device *pdev)
-{
-	struct tmio_mmc_host *host;
-	struct mmc_host *mmc;
-
-	mmc = mmc_alloc_host(sizeof(struct tmio_mmc_host), &pdev->dev);
-	if (!mmc)
-		return NULL;
-
-	host = mmc_priv(mmc);
-	host->mmc = mmc;
-	host->pdev = pdev;
-
-	return host;
-}
-EXPORT_SYMBOL(tmio_mmc_host_alloc);
-
-void tmio_mmc_host_free(struct tmio_mmc_host *host)
-{
-	mmc_free_host(host->mmc);
-}
-EXPORT_SYMBOL(tmio_mmc_host_free);
-
-int tmio_mmc_host_probe(struct tmio_mmc_host *_host,
-			struct tmio_mmc_data *pdata,
-			const struct tmio_mmc_dma_ops *dma_ops)
-{
-	struct platform_device *pdev = _host->pdev;
-	struct mmc_host *mmc = _host->mmc;
-	struct resource *res_ctl;
-	int ret;
-	u32 irq_mask = TMIO_MASK_CMD;
-
-	tmio_mmc_of_parse(pdev, pdata);
-
-	if (!(pdata->flags & TMIO_MMC_HAS_IDLE_WAIT))
-		_host->write16_hook = NULL;
-
-	res_ctl = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (!res_ctl)
-		return -EINVAL;
-
-	ret = mmc_of_parse(mmc);
-	if (ret < 0)
-		return ret;
-
-	_host->pdata = pdata;
-	platform_set_drvdata(pdev, mmc);
-
-	_host->set_pwr = pdata->set_pwr;
-	_host->set_clk_div = pdata->set_clk_div;
-
-	ret = tmio_mmc_init_ocr(_host);
-	if (ret < 0)
-		return ret;
-
-	_host->ctl = devm_ioremap(&pdev->dev,
-				  res_ctl->start, resource_size(res_ctl));
-	if (!_host->ctl)
-		return -ENOMEM;
-
-	tmio_mmc_ops.card_busy = _host->card_busy;
-	tmio_mmc_ops.start_signal_voltage_switch = _host->start_signal_voltage_switch;
-	mmc->ops = &tmio_mmc_ops;
-
-	mmc->caps |= MMC_CAP_4_BIT_DATA | pdata->capabilities;
-	mmc->caps2 |= pdata->capabilities2;
-	mmc->max_segs = 32;
-	mmc->max_blk_size = 512;
-	mmc->max_blk_count = (PAGE_CACHE_SIZE / mmc->max_blk_size) *
-		mmc->max_segs;
-	mmc->max_req_size = mmc->max_blk_size * mmc->max_blk_count;
-	mmc->max_seg_size = mmc->max_req_size;
-
-	_host->native_hotplug = !(pdata->flags & TMIO_MMC_USE_GPIO_CD ||
-				  mmc->caps & MMC_CAP_NEEDS_POLL ||
-				  !mmc_card_is_removable(mmc));
-
-	/*
-	 * On Gen2+, eMMC with NONREMOVABLE currently fails because native
-	 * hotplug gets disabled. It seems RuntimePM related yet we need further
-	 * research. Since we are planning a PM overhaul anyway, let's enforce
-	 * for now the device being active by enabling native hotplug always.
-	 */
-	if (pdata->flags & TMIO_MMC_MIN_RCAR2)
-		_host->native_hotplug = true;
-
-	if (tmio_mmc_clk_enable(_host) < 0) {
-		mmc->f_max = pdata->hclk;
-		mmc->f_min = mmc->f_max / 512;
-	}
-
-	/*
-	 * Check the sanity of mmc->f_min to prevent tmio_mmc_set_clock() from
-	 * looping forever...
-	 */
-	if (mmc->f_min == 0)
-		return -EINVAL;
-
-	/*
-	 * While using internal tmio hardware logic for card detection, we need
-	 * to ensure it stays powered for it to work.
-	 */
-	if (_host->native_hotplug)
-		pm_runtime_get_noresume(&pdev->dev);
-
-	tmio_mmc_clk_stop(_host);
-	tmio_mmc_reset(_host);
-
-	_host->sdcard_irq_mask = sd_ctrl_read16_and_16_as_32(_host, CTL_IRQ_MASK);
-	tmio_mmc_disable_mmc_irqs(_host, TMIO_MASK_ALL);
-
-	/* Unmask the IRQs we want to know about */
-	if (!_host->chan_rx)
-		irq_mask |= TMIO_MASK_READOP;
-	if (!_host->chan_tx)
-		irq_mask |= TMIO_MASK_WRITEOP;
-	if (!_host->native_hotplug)
-		irq_mask &= ~(TMIO_STAT_CARD_REMOVE | TMIO_STAT_CARD_INSERT);
-
-	_host->sdcard_irq_mask &= ~irq_mask;
-
-	_host->sdio_irq_enabled = false;
-	if (pdata->flags & TMIO_MMC_SDIO_IRQ) {
-		_host->sdio_irq_mask = TMIO_SDIO_MASK_ALL;
-		sd_ctrl_write16(_host, CTL_SDIO_IRQ_MASK, _host->sdio_irq_mask);
-		sd_ctrl_write16(_host, CTL_TRANSACTION_CTL, 0x0001);
-	}
-
-	spin_lock_init(&_host->lock);
-	mutex_init(&_host->ios_lock);
-
-	/* Init delayed work for request timeouts */
-	INIT_DELAYED_WORK(&_host->delayed_reset_work, tmio_mmc_reset_work);
-	INIT_WORK(&_host->done, tmio_mmc_done_work);
-
-	/* See if we also get DMA */
-	_host->dma_ops = dma_ops;
-	tmio_mmc_request_dma(_host, pdata);
-
-	pm_runtime_set_active(&pdev->dev);
-	pm_runtime_set_autosuspend_delay(&pdev->dev, 50);
-	pm_runtime_use_autosuspend(&pdev->dev);
-	pm_runtime_enable(&pdev->dev);
-
-	ret = mmc_add_host(mmc);
-	if (ret < 0) {
-		tmio_mmc_host_remove(_host);
-		return ret;
-	}
-
-	dev_pm_qos_expose_latency_limit(&pdev->dev, 100);
-
-	if (pdata->flags & TMIO_MMC_USE_GPIO_CD) {
-		ret = mmc_gpio_request_cd(mmc, pdata->cd_gpio, 0);
-		if (ret < 0) {
-			tmio_mmc_host_remove(_host);
-			return ret;
-		}
-		mmc_gpiod_request_cd_irq(mmc);
-	}
-
-	return 0;
-}
-EXPORT_SYMBOL(tmio_mmc_host_probe);
-
-void tmio_mmc_host_remove(struct tmio_mmc_host *host)
-{
-	struct platform_device *pdev = host->pdev;
-	struct mmc_host *mmc = host->mmc;
-
-	if (host->pdata->flags & TMIO_MMC_SDIO_IRQ)
-		sd_ctrl_write16(host, CTL_TRANSACTION_CTL, 0x0000);
-
-	if (!host->native_hotplug)
-		pm_runtime_get_sync(&pdev->dev);
-
-	dev_pm_qos_hide_latency_limit(&pdev->dev);
-
-	mmc_remove_host(mmc);
-	cancel_work_sync(&host->done);
-	cancel_delayed_work_sync(&host->delayed_reset_work);
-	tmio_mmc_release_dma(host);
-
-	pm_runtime_put_sync(&pdev->dev);
-	pm_runtime_disable(&pdev->dev);
-
-	tmio_mmc_clk_disable(host);
-}
-EXPORT_SYMBOL(tmio_mmc_host_remove);
-
-#ifdef CONFIG_PM
-int tmio_mmc_host_runtime_suspend(struct device *dev)
-{
-	struct mmc_host *mmc = dev_get_drvdata(dev);
-	struct tmio_mmc_host *host = mmc_priv(mmc);
-
-	tmio_mmc_disable_mmc_irqs(host, TMIO_MASK_ALL);
-
-	if (host->clk_cache)
-		tmio_mmc_clk_stop(host);
-
-	tmio_mmc_clk_disable(host);
-
-	return 0;
-}
-EXPORT_SYMBOL(tmio_mmc_host_runtime_suspend);
-
-static bool tmio_mmc_can_retune(struct tmio_mmc_host *host)
-{
-	return host->tap_num && mmc_can_retune(host->mmc);
-}
-
-int tmio_mmc_host_runtime_resume(struct device *dev)
-{
-	struct mmc_host *mmc = dev_get_drvdata(dev);
-	struct tmio_mmc_host *host = mmc_priv(mmc);
-
-	tmio_mmc_reset(host);
-	tmio_mmc_clk_enable(host);
-
-	if (host->clk_cache)
-		tmio_mmc_set_clock(host, host->clk_cache);
-
-	tmio_mmc_enable_dma(host, true);
-
-	if (tmio_mmc_can_retune(host) && host->select_tuning(host))
-		dev_warn(&host->pdev->dev, "Tuning selection failed\n");
-
-	return 0;
-}
-EXPORT_SYMBOL(tmio_mmc_host_runtime_resume);
-#endif
-
-MODULE_LICENSE("GPL v2");
-- 
2.7.4

[cip-dev] [PATCH 4.4.y-cip 67/83] mmc: renesas-sdhi: rename tmio_mmc_dma.c => renesas_sdhi_sys_dmac.c

[Biju Das]

From: Simon Horman <horms+renesas@verge.net.au>

commit c2a96987c76f093be50550130f5629723b091176 upstream.

Rename the source file for DMA for SDHI as a follow-up to attaching
DMA code to the SDHI driver rather than the tmio_core driver.

The name "renesas" is chosen as the SDHI driver is applicable to a wider
range of SoCs than SH-Mobile it seems to be a more appropriate name.
However, the SDHI driver source itself, is left as sh_mobile_sdhi to
avoid unnecessary churn.

The name sys_dmac was chosen to reflect the type of DMA used.

Internal symbols have also been renamed to reflect the filename change.

A follow-up patch will re-organise the SDHI driver removing
the need for renesas_sdhi_get_dma_ops().

Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Biju Das <biju.das@bp.renesas.com>
---
 drivers/mmc/host/Makefile                |   2 +-
 drivers/mmc/host/renesas_sdhi.h          |  18 ++
 drivers/mmc/host/renesas_sdhi_sys_dmac.c | 368 +++++++++++++++++++++++++++++++
 drivers/mmc/host/sh_mobile_sdhi.c        |   3 +-
 drivers/mmc/host/tmio_mmc.h              |   9 -
 drivers/mmc/host/tmio_mmc_dma.c          | 365 ------------------------------
 6 files changed, 389 insertions(+), 376 deletions(-)
 create mode 100644 drivers/mmc/host/renesas_sdhi.h
 create mode 100644 drivers/mmc/host/renesas_sdhi_sys_dmac.c
 delete mode 100644 drivers/mmc/host/tmio_mmc_dma.c

diff --git a/drivers/mmc/host/Makefile b/drivers/mmc/host/Makefile
index 2b75a43..7ab00194 100644
--- a/drivers/mmc/host/Makefile
+++ b/drivers/mmc/host/Makefile
@@ -36,7 +36,7 @@ obj-$(CONFIG_MMC_S3C)   	+= s3cmci.o
 obj-$(CONFIG_MMC_SDRICOH_CS)	+= sdricoh_cs.o
 obj-$(CONFIG_MMC_TMIO)		+= tmio_mmc.o
 obj-$(CONFIG_MMC_TMIO_CORE)	+= tmio_mmc_core.o
-obj-$(CONFIG_MMC_SDHI)		+= sh_mobile_sdhi.o tmio_mmc_dma.o
+obj-$(CONFIG_MMC_SDHI)		+= sh_mobile_sdhi.o renesas_sdhi_sys_dmac.o
 obj-$(CONFIG_MMC_CB710)		+= cb710-mmc.o
 obj-$(CONFIG_MMC_VIA_SDMMC)	+= via-sdmmc.o
 obj-$(CONFIG_SDH_BFIN)		+= bfin_sdh.o
diff --git a/drivers/mmc/host/renesas_sdhi.h b/drivers/mmc/host/renesas_sdhi.h
new file mode 100644
index 0000000..f65d936c
--- /dev/null
+++ b/drivers/mmc/host/renesas_sdhi.h
@@ -0,0 +1,18 @@
+/*
+ * Renesas Mobile SDHI
+ *
+ * Copyright (C) 2017 Horms Solutions Ltd., Simon Horman
+ * Copyright (C) 2017 Renesas Electronics Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef RENESAS_SDHI_H
+#define RENESAS_SDHI_H
+
+#include "tmio_mmc.h"
+
+const struct tmio_mmc_dma_ops *renesas_sdhi_get_dma_ops(void);
+#endif
diff --git a/drivers/mmc/host/renesas_sdhi_sys_dmac.c b/drivers/mmc/host/renesas_sdhi_sys_dmac.c
new file mode 100644
index 0000000..ca96e33
--- /dev/null
+++ b/drivers/mmc/host/renesas_sdhi_sys_dmac.c
@@ -0,0 +1,368 @@
+/*
+ * DMA function for TMIO MMC implementations
+ *
+ * Copyright (C) 2010-2011 Guennadi Liakhovetski
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/device.h>
+#include <linux/dma-mapping.h>
+#include <linux/dmaengine.h>
+#include <linux/mfd/tmio.h>
+#include <linux/mmc/host.h>
+#include <linux/pagemap.h>
+#include <linux/scatterlist.h>
+
+#include "tmio_mmc.h"
+
+#define TMIO_MMC_MIN_DMA_LEN 8
+
+static void renesas_sdhi_sys_dmac_enable_dma(struct tmio_mmc_host *host,
+					     bool enable)
+{
+	if (!host->chan_tx || !host->chan_rx)
+		return;
+
+	if (host->dma->enable)
+		host->dma->enable(host, enable);
+}
+
+static void renesas_sdhi_sys_dmac_abort_dma(struct tmio_mmc_host *host)
+{
+	renesas_sdhi_sys_dmac_enable_dma(host, false);
+
+	if (host->chan_rx)
+		dmaengine_terminate_all(host->chan_rx);
+	if (host->chan_tx)
+		dmaengine_terminate_all(host->chan_tx);
+
+	renesas_sdhi_sys_dmac_enable_dma(host, true);
+}
+
+static void renesas_sdhi_sys_dmac_dma_callback(void *arg)
+{
+	struct tmio_mmc_host *host = arg;
+
+	wait_for_completion(&host->dma_dataend);
+
+	spin_lock_irq(&host->lock);
+
+	if (!host->data)
+		goto out;
+
+	if (host->data->flags & MMC_DATA_READ)
+		dma_unmap_sg(host->chan_rx->device->dev,
+			     host->sg_ptr, host->sg_len,
+			     DMA_FROM_DEVICE);
+	else
+		dma_unmap_sg(host->chan_tx->device->dev,
+			     host->sg_ptr, host->sg_len,
+			     DMA_TO_DEVICE);
+
+	tmio_mmc_do_data_irq(host);
+out:
+	spin_unlock_irq(&host->lock);
+}
+
+static void renesas_sdhi_sys_dmac_start_dma_rx(struct tmio_mmc_host *host)
+{
+	struct scatterlist *sg = host->sg_ptr, *sg_tmp;
+	struct dma_async_tx_descriptor *desc = NULL;
+	struct dma_chan *chan = host->chan_rx;
+	dma_cookie_t cookie;
+	int ret, i;
+	bool aligned = true, multiple = true;
+	unsigned int align = (1 << host->pdata->alignment_shift) - 1;
+
+	for_each_sg(sg, sg_tmp, host->sg_len, i) {
+		if (sg_tmp->offset & align)
+			aligned = false;
+		if (sg_tmp->length & align) {
+			multiple = false;
+			break;
+		}
+	}
+
+	if ((!aligned && (host->sg_len > 1 || sg->length > PAGE_CACHE_SIZE ||
+			  (align & PAGE_MASK))) || !multiple) {
+		ret = -EINVAL;
+		goto pio;
+	}
+
+	if (sg->length < TMIO_MMC_MIN_DMA_LEN) {
+		host->force_pio = true;
+		return;
+	}
+
+	tmio_mmc_disable_mmc_irqs(host, TMIO_STAT_RXRDY);
+
+	/* The only sg element can be unaligned, use our bounce buffer then */
+	if (!aligned) {
+		sg_init_one(&host->bounce_sg, host->bounce_buf, sg->length);
+		host->sg_ptr = &host->bounce_sg;
+		sg = host->sg_ptr;
+	}
+
+	ret = dma_map_sg(chan->device->dev, sg, host->sg_len, DMA_FROM_DEVICE);
+	if (ret > 0)
+		desc = dmaengine_prep_slave_sg(chan, sg, ret,
+			DMA_DEV_TO_MEM, DMA_CTRL_ACK);
+
+	if (desc) {
+		reinit_completion(&host->dma_dataend);
+		desc->callback = renesas_sdhi_sys_dmac_dma_callback;
+		desc->callback_param = host;
+
+		cookie = dmaengine_submit(desc);
+		if (cookie < 0) {
+			desc = NULL;
+			ret = cookie;
+		}
+	}
+pio:
+	if (!desc) {
+		/* DMA failed, fall back to PIO */
+		renesas_sdhi_sys_dmac_enable_dma(host, false);
+		if (ret >= 0)
+			ret = -EIO;
+		host->chan_rx = NULL;
+		dma_release_channel(chan);
+		/* Free the Tx channel too */
+		chan = host->chan_tx;
+		if (chan) {
+			host->chan_tx = NULL;
+			dma_release_channel(chan);
+		}
+		dev_warn(&host->pdev->dev,
+			 "DMA failed: %d, falling back to PIO\n", ret);
+	}
+}
+
+static void renesas_sdhi_sys_dmac_start_dma_tx(struct tmio_mmc_host *host)
+{
+	struct scatterlist *sg = host->sg_ptr, *sg_tmp;
+	struct dma_async_tx_descriptor *desc = NULL;
+	struct dma_chan *chan = host->chan_tx;
+	dma_cookie_t cookie;
+	int ret, i;
+	bool aligned = true, multiple = true;
+	unsigned int align = (1 << host->pdata->alignment_shift) - 1;
+
+	for_each_sg(sg, sg_tmp, host->sg_len, i) {
+		if (sg_tmp->offset & align)
+			aligned = false;
+		if (sg_tmp->length & align) {
+			multiple = false;
+			break;
+		}
+	}
+
+	if ((!aligned && (host->sg_len > 1 || sg->length > PAGE_CACHE_SIZE ||
+			  (align & PAGE_MASK))) || !multiple) {
+		ret = -EINVAL;
+		goto pio;
+	}
+
+	if (sg->length < TMIO_MMC_MIN_DMA_LEN) {
+		host->force_pio = true;
+		return;
+	}
+
+	tmio_mmc_disable_mmc_irqs(host, TMIO_STAT_TXRQ);
+
+	/* The only sg element can be unaligned, use our bounce buffer then */
+	if (!aligned) {
+		unsigned long flags;
+		void *sg_vaddr = tmio_mmc_kmap_atomic(sg, &flags);
+		sg_init_one(&host->bounce_sg, host->bounce_buf, sg->length);
+		memcpy(host->bounce_buf, sg_vaddr, host->bounce_sg.length);
+		tmio_mmc_kunmap_atomic(sg, &flags, sg_vaddr);
+		host->sg_ptr = &host->bounce_sg;
+		sg = host->sg_ptr;
+	}
+
+	ret = dma_map_sg(chan->device->dev, sg, host->sg_len, DMA_TO_DEVICE);
+	if (ret > 0)
+		desc = dmaengine_prep_slave_sg(chan, sg, ret,
+			DMA_MEM_TO_DEV, DMA_CTRL_ACK);
+
+	if (desc) {
+		reinit_completion(&host->dma_dataend);
+		desc->callback = renesas_sdhi_sys_dmac_dma_callback;
+		desc->callback_param = host;
+
+		cookie = dmaengine_submit(desc);
+		if (cookie < 0) {
+			desc = NULL;
+			ret = cookie;
+		}
+	}
+pio:
+	if (!desc) {
+		/* DMA failed, fall back to PIO */
+		renesas_sdhi_sys_dmac_enable_dma(host, false);
+		if (ret >= 0)
+			ret = -EIO;
+		host->chan_tx = NULL;
+		dma_release_channel(chan);
+		/* Free the Rx channel too */
+		chan = host->chan_rx;
+		if (chan) {
+			host->chan_rx = NULL;
+			dma_release_channel(chan);
+		}
+		dev_warn(&host->pdev->dev,
+			 "DMA failed: %d, falling back to PIO\n", ret);
+	}
+}
+
+static void renesas_sdhi_sys_dmac_start_dma(struct tmio_mmc_host *host,
+			       struct mmc_data *data)
+{
+	if (data->flags & MMC_DATA_READ) {
+		if (host->chan_rx)
+			renesas_sdhi_sys_dmac_start_dma_rx(host);
+	} else {
+		if (host->chan_tx)
+			renesas_sdhi_sys_dmac_start_dma_tx(host);
+	}
+}
+
+static void renesas_sdhi_sys_dmac_issue_tasklet_fn(unsigned long priv)
+{
+	struct tmio_mmc_host *host = (struct tmio_mmc_host *)priv;
+	struct dma_chan *chan = NULL;
+
+	spin_lock_irq(&host->lock);
+
+	if (host && host->data) {
+		if (host->data->flags & MMC_DATA_READ)
+			chan = host->chan_rx;
+		else
+			chan = host->chan_tx;
+	}
+
+	spin_unlock_irq(&host->lock);
+
+	tmio_mmc_enable_mmc_irqs(host, TMIO_STAT_DATAEND);
+
+	if (chan)
+		dma_async_issue_pending(chan);
+}
+
+static void renesas_sdhi_sys_dmac_request_dma(struct tmio_mmc_host *host,
+					      struct tmio_mmc_data *pdata)
+{
+	/* We can only either use DMA for both Tx and Rx or not use it at all */
+	if (!host->dma || (!host->pdev->dev.of_node &&
+		(!pdata->chan_priv_tx || !pdata->chan_priv_rx)))
+		return;
+
+	if (!host->chan_tx && !host->chan_rx) {
+		struct resource *res = platform_get_resource(host->pdev,
+							     IORESOURCE_MEM, 0);
+		struct dma_slave_config cfg = {};
+		dma_cap_mask_t mask;
+		int ret;
+
+		if (!res)
+			return;
+
+		dma_cap_zero(mask);
+		dma_cap_set(DMA_SLAVE, mask);
+
+		host->chan_tx = dma_request_slave_channel_compat(mask,
+					host->dma->filter, pdata->chan_priv_tx,
+					&host->pdev->dev, "tx");
+		dev_dbg(&host->pdev->dev, "%s: TX: got channel %p\n", __func__,
+			host->chan_tx);
+
+		if (!host->chan_tx)
+			return;
+
+		cfg.direction = DMA_MEM_TO_DEV;
+		cfg.dst_addr = res->start + (CTL_SD_DATA_PORT << host->bus_shift);
+		cfg.dst_addr_width = host->dma->dma_buswidth;
+		if (!cfg.dst_addr_width)
+			cfg.dst_addr_width = DMA_SLAVE_BUSWIDTH_2_BYTES;
+		cfg.src_addr = 0;
+		ret = dmaengine_slave_config(host->chan_tx, &cfg);
+		if (ret < 0)
+			goto ecfgtx;
+
+		host->chan_rx = dma_request_slave_channel_compat(mask,
+					host->dma->filter, pdata->chan_priv_rx,
+					&host->pdev->dev, "rx");
+		dev_dbg(&host->pdev->dev, "%s: RX: got channel %p\n", __func__,
+			host->chan_rx);
+
+		if (!host->chan_rx)
+			goto ereqrx;
+
+		cfg.direction = DMA_DEV_TO_MEM;
+		cfg.src_addr = cfg.dst_addr + host->pdata->dma_rx_offset;
+		cfg.src_addr_width = host->dma->dma_buswidth;
+		if (!cfg.src_addr_width)
+			cfg.src_addr_width = DMA_SLAVE_BUSWIDTH_2_BYTES;
+		cfg.dst_addr = 0;
+		ret = dmaengine_slave_config(host->chan_rx, &cfg);
+		if (ret < 0)
+			goto ecfgrx;
+
+		host->bounce_buf = (u8 *)__get_free_page(GFP_KERNEL | GFP_DMA);
+		if (!host->bounce_buf)
+			goto ebouncebuf;
+
+		init_completion(&host->dma_dataend);
+		tasklet_init(&host->dma_issue,
+			     renesas_sdhi_sys_dmac_issue_tasklet_fn,
+			     (unsigned long)host);
+	}
+
+	renesas_sdhi_sys_dmac_enable_dma(host, true);
+
+	return;
+
+ebouncebuf:
+ecfgrx:
+	dma_release_channel(host->chan_rx);
+	host->chan_rx = NULL;
+ereqrx:
+ecfgtx:
+	dma_release_channel(host->chan_tx);
+	host->chan_tx = NULL;
+}
+
+static void renesas_sdhi_sys_dmac_release_dma(struct tmio_mmc_host *host)
+{
+	if (host->chan_tx) {
+		struct dma_chan *chan = host->chan_tx;
+		host->chan_tx = NULL;
+		dma_release_channel(chan);
+	}
+	if (host->chan_rx) {
+		struct dma_chan *chan = host->chan_rx;
+		host->chan_rx = NULL;
+		dma_release_channel(chan);
+	}
+	if (host->bounce_buf) {
+		free_pages((unsigned long)host->bounce_buf, 0);
+		host->bounce_buf = NULL;
+	}
+}
+
+static const struct tmio_mmc_dma_ops renesas_sdhi_sys_dmac_dma_ops = {
+	.start = renesas_sdhi_sys_dmac_start_dma,
+	.enable = renesas_sdhi_sys_dmac_enable_dma,
+	.request = renesas_sdhi_sys_dmac_request_dma,
+	.release = renesas_sdhi_sys_dmac_release_dma,
+	.abort = renesas_sdhi_sys_dmac_abort_dma,
+};
+
+const struct tmio_mmc_dma_ops *renesas_sdhi_get_dma_ops(void)
+{
+	return &renesas_sdhi_sys_dmac_dma_ops;
+}
diff --git a/drivers/mmc/host/sh_mobile_sdhi.c b/drivers/mmc/host/sh_mobile_sdhi.c
index 05edac3..8ca9860 100644
--- a/drivers/mmc/host/sh_mobile_sdhi.c
+++ b/drivers/mmc/host/sh_mobile_sdhi.c
@@ -35,6 +35,7 @@
 #include <linux/pinctrl/pinctrl-state.h>
 #include <linux/regulator/consumer.h>
 
+#include "renesas_sdhi.h"
 #include "tmio_mmc.h"
 
 #define EXT_ACC           0xe4
@@ -643,7 +644,7 @@ static int sh_mobile_sdhi_probe(struct platform_device *pdev)
 	/* All SDHI have SDIO status bits which must be 1 */
 	mmc_data->flags |= TMIO_MMC_SDIO_STATUS_SETBITS;
 
-	ret = tmio_mmc_host_probe(host, mmc_data, tmio_mmc_get_dma_ops());
+	ret = tmio_mmc_host_probe(host, mmc_data, renesas_sdhi_get_dma_ops());
 	if (ret < 0)
 		goto efree;
 
diff --git a/drivers/mmc/host/tmio_mmc.h b/drivers/mmc/host/tmio_mmc.h
index 86aa49f3..cd5b4f3 100644
--- a/drivers/mmc/host/tmio_mmc.h
+++ b/drivers/mmc/host/tmio_mmc.h
@@ -212,15 +212,6 @@ void tmio_mmc_enable_mmc_irqs(struct tmio_mmc_host *host, u32 i);
 void tmio_mmc_disable_mmc_irqs(struct tmio_mmc_host *host, u32 i);
 irqreturn_t tmio_mmc_irq(int irq, void *devid);
 
-#if IS_ENABLED(CONFIG_MMC_SDHI)
-const struct tmio_mmc_dma_ops *tmio_mmc_get_dma_ops(void);
-#else
-static inline const struct tmio_mmc_dma_ops *tmio_mmc_get_dma_ops(void)
-{
-	return NULL;
-}
-#endif
-
 static inline char *tmio_mmc_kmap_atomic(struct scatterlist *sg,
 					 unsigned long *flags)
 {
diff --git a/drivers/mmc/host/tmio_mmc_dma.c b/drivers/mmc/host/tmio_mmc_dma.c
deleted file mode 100644
index e743684..0000000
--- a/drivers/mmc/host/tmio_mmc_dma.c
+++ /dev/null
@@ -1,365 +0,0 @@
-/*
- * DMA function for TMIO MMC implementations
- *
- * Copyright (C) 2010-2011 Guennadi Liakhovetski
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
-
-#include <linux/device.h>
-#include <linux/dma-mapping.h>
-#include <linux/dmaengine.h>
-#include <linux/mfd/tmio.h>
-#include <linux/mmc/host.h>
-#include <linux/pagemap.h>
-#include <linux/scatterlist.h>
-
-#include "tmio_mmc.h"
-
-#define TMIO_MMC_MIN_DMA_LEN 8
-
-static void tmio_mmc_enable_dma(struct tmio_mmc_host *host, bool enable)
-{
-	if (!host->chan_tx || !host->chan_rx)
-		return;
-
-	if (host->dma->enable)
-		host->dma->enable(host, enable);
-}
-
-static void tmio_mmc_abort_dma(struct tmio_mmc_host *host)
-{
-	tmio_mmc_enable_dma(host, false);
-
-	if (host->chan_rx)
-		dmaengine_terminate_all(host->chan_rx);
-	if (host->chan_tx)
-		dmaengine_terminate_all(host->chan_tx);
-
-	tmio_mmc_enable_dma(host, true);
-}
-
-static void tmio_mmc_dma_callback(void *arg)
-{
-	struct tmio_mmc_host *host = arg;
-
-	wait_for_completion(&host->dma_dataend);
-
-	spin_lock_irq(&host->lock);
-
-	if (!host->data)
-		goto out;
-
-	if (host->data->flags & MMC_DATA_READ)
-		dma_unmap_sg(host->chan_rx->device->dev,
-			     host->sg_ptr, host->sg_len,
-			     DMA_FROM_DEVICE);
-	else
-		dma_unmap_sg(host->chan_tx->device->dev,
-			     host->sg_ptr, host->sg_len,
-			     DMA_TO_DEVICE);
-
-	tmio_mmc_do_data_irq(host);
-out:
-	spin_unlock_irq(&host->lock);
-}
-
-static void tmio_mmc_start_dma_rx(struct tmio_mmc_host *host)
-{
-	struct scatterlist *sg = host->sg_ptr, *sg_tmp;
-	struct dma_async_tx_descriptor *desc = NULL;
-	struct dma_chan *chan = host->chan_rx;
-	dma_cookie_t cookie;
-	int ret, i;
-	bool aligned = true, multiple = true;
-	unsigned int align = (1 << host->pdata->alignment_shift) - 1;
-
-	for_each_sg(sg, sg_tmp, host->sg_len, i) {
-		if (sg_tmp->offset & align)
-			aligned = false;
-		if (sg_tmp->length & align) {
-			multiple = false;
-			break;
-		}
-	}
-
-	if ((!aligned && (host->sg_len > 1 || sg->length > PAGE_CACHE_SIZE ||
-			  (align & PAGE_MASK))) || !multiple) {
-		ret = -EINVAL;
-		goto pio;
-	}
-
-	if (sg->length < TMIO_MMC_MIN_DMA_LEN) {
-		host->force_pio = true;
-		return;
-	}
-
-	tmio_mmc_disable_mmc_irqs(host, TMIO_STAT_RXRDY);
-
-	/* The only sg element can be unaligned, use our bounce buffer then */
-	if (!aligned) {
-		sg_init_one(&host->bounce_sg, host->bounce_buf, sg->length);
-		host->sg_ptr = &host->bounce_sg;
-		sg = host->sg_ptr;
-	}
-
-	ret = dma_map_sg(chan->device->dev, sg, host->sg_len, DMA_FROM_DEVICE);
-	if (ret > 0)
-		desc = dmaengine_prep_slave_sg(chan, sg, ret,
-			DMA_DEV_TO_MEM, DMA_CTRL_ACK);
-
-	if (desc) {
-		reinit_completion(&host->dma_dataend);
-		desc->callback = tmio_mmc_dma_callback;
-		desc->callback_param = host;
-
-		cookie = dmaengine_submit(desc);
-		if (cookie < 0) {
-			desc = NULL;
-			ret = cookie;
-		}
-	}
-pio:
-	if (!desc) {
-		/* DMA failed, fall back to PIO */
-		tmio_mmc_enable_dma(host, false);
-		if (ret >= 0)
-			ret = -EIO;
-		host->chan_rx = NULL;
-		dma_release_channel(chan);
-		/* Free the Tx channel too */
-		chan = host->chan_tx;
-		if (chan) {
-			host->chan_tx = NULL;
-			dma_release_channel(chan);
-		}
-		dev_warn(&host->pdev->dev,
-			 "DMA failed: %d, falling back to PIO\n", ret);
-	}
-}
-
-static void tmio_mmc_start_dma_tx(struct tmio_mmc_host *host)
-{
-	struct scatterlist *sg = host->sg_ptr, *sg_tmp;
-	struct dma_async_tx_descriptor *desc = NULL;
-	struct dma_chan *chan = host->chan_tx;
-	dma_cookie_t cookie;
-	int ret, i;
-	bool aligned = true, multiple = true;
-	unsigned int align = (1 << host->pdata->alignment_shift) - 1;
-
-	for_each_sg(sg, sg_tmp, host->sg_len, i) {
-		if (sg_tmp->offset & align)
-			aligned = false;
-		if (sg_tmp->length & align) {
-			multiple = false;
-			break;
-		}
-	}
-
-	if ((!aligned && (host->sg_len > 1 || sg->length > PAGE_CACHE_SIZE ||
-			  (align & PAGE_MASK))) || !multiple) {
-		ret = -EINVAL;
-		goto pio;
-	}
-
-	if (sg->length < TMIO_MMC_MIN_DMA_LEN) {
-		host->force_pio = true;
-		return;
-	}
-
-	tmio_mmc_disable_mmc_irqs(host, TMIO_STAT_TXRQ);
-
-	/* The only sg element can be unaligned, use our bounce buffer then */
-	if (!aligned) {
-		unsigned long flags;
-		void *sg_vaddr = tmio_mmc_kmap_atomic(sg, &flags);
-		sg_init_one(&host->bounce_sg, host->bounce_buf, sg->length);
-		memcpy(host->bounce_buf, sg_vaddr, host->bounce_sg.length);
-		tmio_mmc_kunmap_atomic(sg, &flags, sg_vaddr);
-		host->sg_ptr = &host->bounce_sg;
-		sg = host->sg_ptr;
-	}
-
-	ret = dma_map_sg(chan->device->dev, sg, host->sg_len, DMA_TO_DEVICE);
-	if (ret > 0)
-		desc = dmaengine_prep_slave_sg(chan, sg, ret,
-			DMA_MEM_TO_DEV, DMA_CTRL_ACK);
-
-	if (desc) {
-		reinit_completion(&host->dma_dataend);
-		desc->callback = tmio_mmc_dma_callback;
-		desc->callback_param = host;
-
-		cookie = dmaengine_submit(desc);
-		if (cookie < 0) {
-			desc = NULL;
-			ret = cookie;
-		}
-	}
-pio:
-	if (!desc) {
-		/* DMA failed, fall back to PIO */
-		tmio_mmc_enable_dma(host, false);
-		if (ret >= 0)
-			ret = -EIO;
-		host->chan_tx = NULL;
-		dma_release_channel(chan);
-		/* Free the Rx channel too */
-		chan = host->chan_rx;
-		if (chan) {
-			host->chan_rx = NULL;
-			dma_release_channel(chan);
-		}
-		dev_warn(&host->pdev->dev,
-			 "DMA failed: %d, falling back to PIO\n", ret);
-	}
-}
-
-static void tmio_mmc_start_dma(struct tmio_mmc_host *host,
-			       struct mmc_data *data)
-{
-	if (data->flags & MMC_DATA_READ) {
-		if (host->chan_rx)
-			tmio_mmc_start_dma_rx(host);
-	} else {
-		if (host->chan_tx)
-			tmio_mmc_start_dma_tx(host);
-	}
-}
-
-static void tmio_mmc_issue_tasklet_fn(unsigned long priv)
-{
-	struct tmio_mmc_host *host = (struct tmio_mmc_host *)priv;
-	struct dma_chan *chan = NULL;
-
-	spin_lock_irq(&host->lock);
-
-	if (host && host->data) {
-		if (host->data->flags & MMC_DATA_READ)
-			chan = host->chan_rx;
-		else
-			chan = host->chan_tx;
-	}
-
-	spin_unlock_irq(&host->lock);
-
-	tmio_mmc_enable_mmc_irqs(host, TMIO_STAT_DATAEND);
-
-	if (chan)
-		dma_async_issue_pending(chan);
-}
-
-static void tmio_mmc_request_dma(struct tmio_mmc_host *host,
-				 struct tmio_mmc_data *pdata)
-{
-	/* We can only either use DMA for both Tx and Rx or not use it at all */
-	if (!host->dma || (!host->pdev->dev.of_node &&
-		(!pdata->chan_priv_tx || !pdata->chan_priv_rx)))
-		return;
-
-	if (!host->chan_tx && !host->chan_rx) {
-		struct resource *res = platform_get_resource(host->pdev,
-							     IORESOURCE_MEM, 0);
-		struct dma_slave_config cfg = {};
-		dma_cap_mask_t mask;
-		int ret;
-
-		if (!res)
-			return;
-
-		dma_cap_zero(mask);
-		dma_cap_set(DMA_SLAVE, mask);
-
-		host->chan_tx = dma_request_slave_channel_compat(mask,
-					host->dma->filter, pdata->chan_priv_tx,
-					&host->pdev->dev, "tx");
-		dev_dbg(&host->pdev->dev, "%s: TX: got channel %p\n", __func__,
-			host->chan_tx);
-
-		if (!host->chan_tx)
-			return;
-
-		cfg.direction = DMA_MEM_TO_DEV;
-		cfg.dst_addr = res->start + (CTL_SD_DATA_PORT << host->bus_shift);
-		cfg.dst_addr_width = host->dma->dma_buswidth;
-		if (!cfg.dst_addr_width)
-			cfg.dst_addr_width = DMA_SLAVE_BUSWIDTH_2_BYTES;
-		cfg.src_addr = 0;
-		ret = dmaengine_slave_config(host->chan_tx, &cfg);
-		if (ret < 0)
-			goto ecfgtx;
-
-		host->chan_rx = dma_request_slave_channel_compat(mask,
-					host->dma->filter, pdata->chan_priv_rx,
-					&host->pdev->dev, "rx");
-		dev_dbg(&host->pdev->dev, "%s: RX: got channel %p\n", __func__,
-			host->chan_rx);
-
-		if (!host->chan_rx)
-			goto ereqrx;
-
-		cfg.direction = DMA_DEV_TO_MEM;
-		cfg.src_addr = cfg.dst_addr + host->pdata->dma_rx_offset;
-		cfg.src_addr_width = host->dma->dma_buswidth;
-		if (!cfg.src_addr_width)
-			cfg.src_addr_width = DMA_SLAVE_BUSWIDTH_2_BYTES;
-		cfg.dst_addr = 0;
-		ret = dmaengine_slave_config(host->chan_rx, &cfg);
-		if (ret < 0)
-			goto ecfgrx;
-
-		host->bounce_buf = (u8 *)__get_free_page(GFP_KERNEL | GFP_DMA);
-		if (!host->bounce_buf)
-			goto ebouncebuf;
-
-		init_completion(&host->dma_dataend);
-		tasklet_init(&host->dma_issue, tmio_mmc_issue_tasklet_fn, (unsigned long)host);
-	}
-
-	tmio_mmc_enable_dma(host, true);
-
-	return;
-
-ebouncebuf:
-ecfgrx:
-	dma_release_channel(host->chan_rx);
-	host->chan_rx = NULL;
-ereqrx:
-ecfgtx:
-	dma_release_channel(host->chan_tx);
-	host->chan_tx = NULL;
-}
-
-static void tmio_mmc_release_dma(struct tmio_mmc_host *host)
-{
-	if (host->chan_tx) {
-		struct dma_chan *chan = host->chan_tx;
-		host->chan_tx = NULL;
-		dma_release_channel(chan);
-	}
-	if (host->chan_rx) {
-		struct dma_chan *chan = host->chan_rx;
-		host->chan_rx = NULL;
-		dma_release_channel(chan);
-	}
-	if (host->bounce_buf) {
-		free_pages((unsigned long)host->bounce_buf, 0);
-		host->bounce_buf = NULL;
-	}
-}
-
-static const struct tmio_mmc_dma_ops tmio_mmc_dma_ops = {
-	.start = tmio_mmc_start_dma,
-	.enable = tmio_mmc_enable_dma,
-	.request = tmio_mmc_request_dma,
-	.release = tmio_mmc_release_dma,
-	.abort = tmio_mmc_abort_dma,
-};
-
-const struct tmio_mmc_dma_ops *tmio_mmc_get_dma_ops(void)
-{
-	return &tmio_mmc_dma_ops;
-}
-- 
2.7.4

[cip-dev] [PATCH 4.4.y-cip 68/83] mmc: renesas-sdhi: rename sh_mobile_sdhi.c => renesas_sdhi_core.c

[Biju Das]

From: Simon Horman <horms+renesas@verge.net.au>

commit b5b6a5f4f06c0624886b2166e2e8580327f0b943 upstream.

Rename the source file SDHI. A follow-up patch will make it a library
file used by a different top-level module file.

The name "renesas" is chosen as the SDHI driver is applicable to a wider
range of SoCs than SH-Mobile it seems to be a more appropriate name.
However, the SDHI driver source itself, is left as sh_mobile_sdhi to
avoid unnecessary churn.

the name "core" was chosen to reflect the desired role of this file,
to provide core functionality to the sdhi driver. A follow-up patch will
move the file into that role.

Internal symbols have also been renamed to reflect the filename change.

The .name member of struct platform_driver and parameter to
MODULE_ALIAS() have not been changed in order to avoid the complication
of potentially breaking SH SoCs which still use platform drivers.

Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Biju Das <biju.das@bp.renesas.com>
[ Backported to 4.4 kernel ]
---
 drivers/mmc/host/Kconfig             |   2 +-
 drivers/mmc/host/Makefile            |   2 +-
 drivers/mmc/host/renesas_sdhi_core.c | 741 ++++++++++++++++++++++++++++++++++
 drivers/mmc/host/sh_mobile_sdhi.c    | 746 -----------------------------------
 4 files changed, 743 insertions(+), 748 deletions(-)
 create mode 100644 drivers/mmc/host/renesas_sdhi_core.c
 delete mode 100644 drivers/mmc/host/sh_mobile_sdhi.c

diff --git a/drivers/mmc/host/Kconfig b/drivers/mmc/host/Kconfig
index 2e6d2ff..eaf40ec 100644
--- a/drivers/mmc/host/Kconfig
+++ b/drivers/mmc/host/Kconfig
@@ -565,7 +565,7 @@ config MMC_SDHI
 	select MMC_TMIO_CORE
 	help
 	  This provides support for the SDHI SD/SDIO controller found in
-	  SuperH and ARM SH-Mobile SoCs
+	  Renesas SuperH, ARM and ARM64 based SoCs
 
 config MMC_CB710
 	tristate "ENE CB710 MMC/SD Interface support"
diff --git a/drivers/mmc/host/Makefile b/drivers/mmc/host/Makefile
index 7ab00194..c3c85c9 100644
--- a/drivers/mmc/host/Makefile
+++ b/drivers/mmc/host/Makefile
@@ -36,7 +36,7 @@ obj-$(CONFIG_MMC_S3C)   	+= s3cmci.o
 obj-$(CONFIG_MMC_SDRICOH_CS)	+= sdricoh_cs.o
 obj-$(CONFIG_MMC_TMIO)		+= tmio_mmc.o
 obj-$(CONFIG_MMC_TMIO_CORE)	+= tmio_mmc_core.o
-obj-$(CONFIG_MMC_SDHI)		+= sh_mobile_sdhi.o renesas_sdhi_sys_dmac.o
+obj-$(CONFIG_MMC_SDHI)		+= renesas_sdhi_core.o renesas_sdhi_sys_dmac.o
 obj-$(CONFIG_MMC_CB710)		+= cb710-mmc.o
 obj-$(CONFIG_MMC_VIA_SDMMC)	+= via-sdmmc.o
 obj-$(CONFIG_SDH_BFIN)		+= bfin_sdh.o
diff --git a/drivers/mmc/host/renesas_sdhi_core.c b/drivers/mmc/host/renesas_sdhi_core.c
new file mode 100644
index 0000000..ee60e90
--- /dev/null
+++ b/drivers/mmc/host/renesas_sdhi_core.c
@@ -0,0 +1,741 @@
+/*
+ * SuperH Mobile SDHI
+ *
+ * Copyright (C) 2016 Sang Engineering, Wolfram Sang
+ * Copyright (C) 2015-16 Renesas Electronics Corporation
+ * Copyright (C) 2009 Magnus Damm
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * Based on "Compaq ASIC3 support":
+ *
+ * Copyright 2001 Compaq Computer Corporation.
+ * Copyright 2004-2005 Phil Blundell
+ * Copyright 2007-2008 OpenedHand Ltd.
+ *
+ * Authors: Phil Blundell <pb@handhelds.org>,
+ *	    Samuel Ortiz <sameo@openedhand.com>
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/clk.h>
+#include <linux/slab.h>
+#include <linux/mod_devicetable.h>
+#include <linux/module.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>
+#include <linux/mmc/host.h>
+#include <linux/mfd/tmio.h>
+#include <linux/sh_dma.h>
+#include <linux/delay.h>
+#include <linux/pinctrl/consumer.h>
+#include <linux/pinctrl/pinctrl-state.h>
+#include <linux/regulator/consumer.h>
+
+#include "renesas_sdhi.h"
+#include "tmio_mmc.h"
+
+#define EXT_ACC           0xe4
+
+#define SDHI_VER_GEN2_SDR50	0x490c
+/* very old datasheets said 0x490c for SDR104, too. They are wrong! */
+#define SDHI_VER_GEN2_SDR104	0xcb0d
+#define SDHI_VER_GEN3_SD	0xcc10
+#define SDHI_VER_GEN3_SDMMC	0xcd10
+
+#define host_to_priv(host) container_of((host)->pdata, struct renesas_sdhi, mmc_data)
+
+struct renesas_sdhi_scc {
+	unsigned long clk_rate;	/* clock rate for SDR104 */
+	u32 tap;		/* sampling clock position for SDR104 */
+};
+
+struct renesas_sdhi_of_data {
+	unsigned long tmio_flags;
+	u32	      tmio_ocr_mask;
+	unsigned long capabilities;
+	unsigned long capabilities2;
+	enum dma_slave_buswidth dma_buswidth;
+	dma_addr_t dma_rx_offset;
+	unsigned bus_shift;
+	int scc_offset;
+	struct renesas_sdhi_scc *taps;
+	int taps_num;
+};
+
+static const struct renesas_sdhi_of_data of_default_cfg = {
+	.tmio_flags = TMIO_MMC_HAS_IDLE_WAIT,
+};
+
+static const struct renesas_sdhi_of_data of_rcar_gen1_compatible = {
+	.tmio_flags	= TMIO_MMC_HAS_IDLE_WAIT | TMIO_MMC_WRPROTECT_DISABLE |
+			  TMIO_MMC_CLK_ACTUAL,
+	.capabilities	= MMC_CAP_SD_HIGHSPEED | MMC_CAP_SDIO_IRQ,
+};
+
+/* Definitions for sampling clocks */
+static struct renesas_sdhi_scc rcar_gen2_scc_taps[] = {
+	{
+		.clk_rate = 156000000,
+		.tap = 0x00000703,
+	},
+	{
+		.clk_rate = 0,
+		.tap = 0x00000300,
+	},
+};
+
+static const struct renesas_sdhi_of_data of_rcar_gen2_compatible = {
+	.tmio_flags	= TMIO_MMC_HAS_IDLE_WAIT | TMIO_MMC_WRPROTECT_DISABLE |
+			  TMIO_MMC_CLK_ACTUAL | TMIO_MMC_MIN_RCAR2,
+	.capabilities	= MMC_CAP_SD_HIGHSPEED | MMC_CAP_SDIO_IRQ,
+	.dma_buswidth	= DMA_SLAVE_BUSWIDTH_4_BYTES,
+	.dma_rx_offset	= 0x2000,
+	.scc_offset	= 0x0300,
+	.taps		= rcar_gen2_scc_taps,
+	.taps_num	= ARRAY_SIZE(rcar_gen2_scc_taps),
+};
+
+/* Definitions for sampling clocks */
+static struct renesas_sdhi_scc rcar_gen3_scc_taps[] = {
+	{
+		.clk_rate = 0,
+		.tap = 0x00000300,
+	},
+};
+
+static const struct renesas_sdhi_of_data of_rcar_gen3_compatible = {
+	.tmio_flags	= TMIO_MMC_HAS_IDLE_WAIT | TMIO_MMC_WRPROTECT_DISABLE |
+			  TMIO_MMC_CLK_ACTUAL | TMIO_MMC_MIN_RCAR2,
+	.capabilities	= MMC_CAP_SD_HIGHSPEED | MMC_CAP_SDIO_IRQ,
+	.bus_shift	= 2,
+	.scc_offset	= 0x1000,
+	.taps		= rcar_gen3_scc_taps,
+	.taps_num	= ARRAY_SIZE(rcar_gen3_scc_taps),
+};
+
+static const struct of_device_id renesas_sdhi_of_match[] = {
+	{ .compatible = "renesas,sdhi-shmobile" },
+	{ .compatible = "renesas,sdhi-sh7372" },
+	{ .compatible = "renesas,sdhi-sh73a0", .data = &of_default_cfg, },
+	{ .compatible = "renesas,sdhi-r8a73a4", .data = &of_default_cfg, },
+	{ .compatible = "renesas,sdhi-r8a7740", .data = &of_default_cfg, },
+	{ .compatible = "renesas,sdhi-r8a7778", .data = &of_rcar_gen1_compatible, },
+	{ .compatible = "renesas,sdhi-r8a7779", .data = &of_rcar_gen1_compatible, },
+	{ .compatible = "renesas,sdhi-r8a7743", .data = &of_rcar_gen2_compatible, },
+	{ .compatible = "renesas,sdhi-r8a7745", .data = &of_rcar_gen2_compatible, },
+	{ .compatible = "renesas,sdhi-r8a7790", .data = &of_rcar_gen2_compatible, },
+	{ .compatible = "renesas,sdhi-r8a7791", .data = &of_rcar_gen2_compatible, },
+	{ .compatible = "renesas,sdhi-r8a7792", .data = &of_rcar_gen2_compatible, },
+	{ .compatible = "renesas,sdhi-r8a7793", .data = &of_rcar_gen2_compatible, },
+	{ .compatible = "renesas,sdhi-r8a7794", .data = &of_rcar_gen2_compatible, },
+	{},
+};
+MODULE_DEVICE_TABLE(of, renesas_sdhi_of_match);
+
+struct renesas_sdhi {
+	struct clk *clk;
+	struct tmio_mmc_data mmc_data;
+	struct tmio_mmc_dma dma_priv;
+	struct pinctrl *pinctrl;
+	struct pinctrl_state *pins_default, *pins_uhs;
+	void __iomem *scc_ctl;
+};
+
+static void renesas_sdhi_sdbuf_width(struct tmio_mmc_host *host, int width)
+{
+	u32 val;
+
+	/*
+	 * see also
+	 *	renesas_sdhi_of_data :: dma_buswidth
+	 */
+	switch (sd_ctrl_read16(host, CTL_VERSION)) {
+	case SDHI_VER_GEN2_SDR50:
+		val = (width == 32) ? 0x0001 : 0x0000;
+		break;
+	case SDHI_VER_GEN2_SDR104:
+		val = (width == 32) ? 0x0000 : 0x0001;
+		break;
+	case SDHI_VER_GEN3_SD:
+	case SDHI_VER_GEN3_SDMMC:
+		if (width == 64)
+			val = 0x0000;
+		else if (width == 32)
+			val = 0x0101;
+		else
+			val = 0x0001;
+		break;
+	default:
+		/* nothing to do */
+		return;
+	}
+
+	sd_ctrl_write16(host, EXT_ACC, val);
+}
+
+static int renesas_sdhi_clk_enable(struct tmio_mmc_host *host)
+{
+	struct mmc_host *mmc = host->mmc;
+	struct renesas_sdhi *priv = host_to_priv(host);
+	int ret = clk_prepare_enable(priv->clk);
+	if (ret < 0)
+		return ret;
+
+	/*
+	 * The clock driver may not know what maximum frequency
+	 * actually works, so it should be set with the max-frequency
+	 * property which will already have been read to f_max.  If it
+	 * was missing, assume the current frequency is the maximum.
+	 */
+	if (!mmc->f_max)
+		mmc->f_max = clk_get_rate(priv->clk);
+
+	/*
+	 * Minimum frequency is the minimum input clock frequency
+	 * divided by our maximum divider.
+	 */
+	mmc->f_min = max(clk_round_rate(priv->clk, 1) / 512, 1L);
+
+	/* enable 16bit data access on SDBUF as default */
+	renesas_sdhi_sdbuf_width(host, 16);
+
+	return 0;
+}
+
+static unsigned int renesas_sdhi_clk_update(struct tmio_mmc_host *host,
+					      unsigned int new_clock)
+{
+	struct renesas_sdhi *priv = host_to_priv(host);
+	unsigned int freq, diff, best_freq = 0, diff_min = ~0;
+	int i, ret;
+
+	/* tested only on RCar Gen2+ currently; may work for others */
+	if (!(host->pdata->flags & TMIO_MMC_MIN_RCAR2))
+		return clk_get_rate(priv->clk);
+
+	/*
+	 * We want the bus clock to be as close as possible to, but no
+	 * greater than, new_clock.  As we can divide by 1 << i for
+	 * any i in [0, 9] we want the input clock to be as close as
+	 * possible, but no greater than, new_clock << i.
+	 */
+	for (i = min(9, ilog2(UINT_MAX / new_clock)); i >= 0; i--) {
+		freq = clk_round_rate(priv->clk, new_clock << i);
+		if (freq > (new_clock << i)) {
+			/* Too fast; look for a slightly slower option */
+			freq = clk_round_rate(priv->clk,
+					      (new_clock << i) / 4 * 3);
+			if (freq > (new_clock << i))
+				continue;
+		}
+
+		diff = new_clock - (freq >> i);
+		if (diff <= diff_min) {
+			best_freq = freq;
+			diff_min = diff;
+		}
+	}
+
+	ret = clk_set_rate(priv->clk, best_freq);
+
+	return ret == 0 ? best_freq : clk_get_rate(priv->clk);
+}
+
+static void renesas_sdhi_clk_disable(struct tmio_mmc_host *host)
+{
+	struct renesas_sdhi *priv = host_to_priv(host);
+
+	clk_disable_unprepare(priv->clk);
+}
+
+static int renesas_sdhi_card_busy(struct mmc_host *mmc)
+{
+	struct tmio_mmc_host *host = mmc_priv(mmc);
+
+	return !(sd_ctrl_read16_and_16_as_32(host, CTL_STATUS) & TMIO_STAT_DAT0);
+}
+
+static int renesas_sdhi_start_signal_voltage_switch(struct mmc_host *mmc,
+						      struct mmc_ios *ios)
+{
+	struct tmio_mmc_host *host = mmc_priv(mmc);
+	struct renesas_sdhi *priv = host_to_priv(host);
+	struct pinctrl_state *pin_state;
+	int ret;
+
+	switch (ios->signal_voltage) {
+	case MMC_SIGNAL_VOLTAGE_330:
+		pin_state = priv->pins_default;
+		break;
+	case MMC_SIGNAL_VOLTAGE_180:
+		pin_state = priv->pins_uhs;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	/*
+	 * If anything is missing, assume signal voltage is fixed at
+	 * 3.3V and succeed/fail accordingly.
+	 */
+	if (IS_ERR(priv->pinctrl) || IS_ERR(pin_state))
+		return ios->signal_voltage ==
+			MMC_SIGNAL_VOLTAGE_330 ? 0 : -EINVAL;
+
+	ret = mmc_regulator_set_vqmmc(host->mmc, ios);
+	if (ret)
+		return ret;
+
+	return pinctrl_select_state(priv->pinctrl, pin_state);
+}
+
+/* SCC registers */
+#define SH_MOBILE_SDHI_SCC_DTCNTL	0x000
+#define SH_MOBILE_SDHI_SCC_TAPSET	0x002
+#define SH_MOBILE_SDHI_SCC_DT2FF	0x004
+#define SH_MOBILE_SDHI_SCC_CKSEL	0x006
+#define SH_MOBILE_SDHI_SCC_RVSCNTL	0x008
+#define SH_MOBILE_SDHI_SCC_RVSREQ	0x00A
+
+/* Definitions for values the SH_MOBILE_SDHI_SCC_DTCNTL register */
+#define SH_MOBILE_SDHI_SCC_DTCNTL_TAPEN		BIT(0)
+#define SH_MOBILE_SDHI_SCC_DTCNTL_TAPNUM_SHIFT	16
+#define SH_MOBILE_SDHI_SCC_DTCNTL_TAPNUM_MASK	0xff
+
+/* Definitions for values the SH_MOBILE_SDHI_SCC_CKSEL register */
+#define SH_MOBILE_SDHI_SCC_CKSEL_DTSEL		BIT(0)
+/* Definitions for values the SH_MOBILE_SDHI_SCC_RVSCNTL register */
+#define SH_MOBILE_SDHI_SCC_RVSCNTL_RVSEN	BIT(0)
+/* Definitions for values the SH_MOBILE_SDHI_SCC_RVSREQ register */
+#define SH_MOBILE_SDHI_SCC_RVSREQ_RVSERR	BIT(2)
+
+static inline u32 sd_scc_read32(struct tmio_mmc_host *host,
+				struct renesas_sdhi *priv, int addr)
+{
+	return readl(priv->scc_ctl + (addr << host->bus_shift));
+}
+
+static inline void sd_scc_write32(struct tmio_mmc_host *host,
+				  struct renesas_sdhi *priv,
+				  int addr, u32 val)
+{
+	writel(val, priv->scc_ctl + (addr << host->bus_shift));
+}
+
+static unsigned int renesas_sdhi_init_tuning(struct tmio_mmc_host *host)
+{
+	struct renesas_sdhi *priv;
+
+	priv = host_to_priv(host);
+
+	/* set sampling clock selection range */
+	sd_scc_write32(host, priv, SH_MOBILE_SDHI_SCC_DTCNTL,
+		       0x8 << SH_MOBILE_SDHI_SCC_DTCNTL_TAPNUM_SHIFT);
+
+	/* Initialize SCC */
+	sd_ctrl_write32_as_16_and_16(host, CTL_STATUS, 0x0);
+
+	sd_scc_write32(host, priv, SH_MOBILE_SDHI_SCC_DTCNTL,
+		       SH_MOBILE_SDHI_SCC_DTCNTL_TAPEN |
+		       sd_scc_read32(host, priv, SH_MOBILE_SDHI_SCC_DTCNTL));
+
+	sd_ctrl_write16(host, CTL_SD_CARD_CLK_CTL, ~CLK_CTL_SCLKEN &
+			sd_ctrl_read16(host, CTL_SD_CARD_CLK_CTL));
+
+	sd_scc_write32(host, priv, SH_MOBILE_SDHI_SCC_CKSEL,
+		       SH_MOBILE_SDHI_SCC_CKSEL_DTSEL |
+		       sd_scc_read32(host, priv, SH_MOBILE_SDHI_SCC_CKSEL));
+
+	sd_ctrl_write16(host, CTL_SD_CARD_CLK_CTL, CLK_CTL_SCLKEN |
+			sd_ctrl_read16(host, CTL_SD_CARD_CLK_CTL));
+
+	sd_scc_write32(host, priv, SH_MOBILE_SDHI_SCC_RVSCNTL,
+		       ~SH_MOBILE_SDHI_SCC_RVSCNTL_RVSEN &
+		       sd_scc_read32(host, priv, SH_MOBILE_SDHI_SCC_RVSCNTL));
+
+	sd_scc_write32(host, priv, SH_MOBILE_SDHI_SCC_DT2FF, host->scc_tappos);
+
+	/* Read TAPNUM */
+	return (sd_scc_read32(host, priv, SH_MOBILE_SDHI_SCC_DTCNTL) >>
+		SH_MOBILE_SDHI_SCC_DTCNTL_TAPNUM_SHIFT) &
+		SH_MOBILE_SDHI_SCC_DTCNTL_TAPNUM_MASK;
+}
+
+static void renesas_sdhi_prepare_tuning(struct tmio_mmc_host *host,
+					 unsigned long tap)
+{
+	struct renesas_sdhi *priv = host_to_priv(host);
+
+	/* Set sampling clock position */
+	sd_scc_write32(host, priv, SH_MOBILE_SDHI_SCC_TAPSET, tap);
+}
+
+#define SH_MOBILE_SDHI_MAX_TAP 3
+
+static int renesas_sdhi_select_tuning(struct tmio_mmc_host *host)
+{
+	struct renesas_sdhi *priv = host_to_priv(host);
+	unsigned long tap_cnt;  /* counter of tuning success */
+	unsigned long tap_set;  /* tap position */
+	unsigned long tap_start;/* start position of tuning success */
+	unsigned long tap_end;  /* end position of tuning success */
+	unsigned long ntap;     /* temporary counter of tuning success */
+	unsigned long i;
+
+	/* Clear SCC_RVSREQ */
+	sd_scc_write32(host, priv, SH_MOBILE_SDHI_SCC_RVSREQ, 0);
+
+	/*
+	 * Find the longest consecutive run of successful probes.  If that
+	 * is more than SH_MOBILE_SDHI_MAX_TAP probes long then use the
+	 * center index as the tap.
+	 */
+	tap_cnt = 0;
+	ntap = 0;
+	tap_start = 0;
+	tap_end = 0;
+	for (i = 0; i < host->tap_num * 2; i++) {
+		if (test_bit(i, host->taps))
+			ntap++;
+		else {
+			if (ntap > tap_cnt) {
+				tap_start = i - ntap;
+				tap_end = i - 1;
+				tap_cnt = ntap;
+			}
+			ntap = 0;
+		}
+	}
+
+	if (ntap > tap_cnt) {
+		tap_start = i - ntap;
+		tap_end = i - 1;
+		tap_cnt = ntap;
+	}
+
+	if (tap_cnt >= SH_MOBILE_SDHI_MAX_TAP)
+		tap_set = (tap_start + tap_end) / 2 % host->tap_num;
+	else
+		return -EIO;
+
+	/* Set SCC */
+	sd_scc_write32(host, priv, SH_MOBILE_SDHI_SCC_TAPSET, tap_set);
+
+	/* Enable auto re-tuning */
+	sd_scc_write32(host, priv, SH_MOBILE_SDHI_SCC_RVSCNTL,
+		       SH_MOBILE_SDHI_SCC_RVSCNTL_RVSEN |
+		       sd_scc_read32(host, priv, SH_MOBILE_SDHI_SCC_RVSCNTL));
+
+	return 0;
+}
+
+
+static bool renesas_sdhi_check_scc_error(struct tmio_mmc_host *host)
+{
+	struct renesas_sdhi *priv = host_to_priv(host);
+
+	/* Check SCC error */
+	if (sd_scc_read32(host, priv, SH_MOBILE_SDHI_SCC_RVSCNTL) &
+	    SH_MOBILE_SDHI_SCC_RVSCNTL_RVSEN &&
+	    sd_scc_read32(host, priv, SH_MOBILE_SDHI_SCC_RVSREQ) &
+	    SH_MOBILE_SDHI_SCC_RVSREQ_RVSERR) {
+		/* Clear SCC error */
+		sd_scc_write32(host, priv, SH_MOBILE_SDHI_SCC_RVSREQ, 0);
+		return true;
+	}
+
+	return false;
+}
+
+static void renesas_sdhi_hw_reset(struct tmio_mmc_host *host)
+{
+	struct renesas_sdhi *priv;
+
+	priv = host_to_priv(host);
+
+	/* Reset SCC */
+	sd_ctrl_write16(host, CTL_SD_CARD_CLK_CTL, ~CLK_CTL_SCLKEN &
+			sd_ctrl_read16(host, CTL_SD_CARD_CLK_CTL));
+
+	sd_scc_write32(host, priv, SH_MOBILE_SDHI_SCC_CKSEL,
+		       ~SH_MOBILE_SDHI_SCC_CKSEL_DTSEL &
+		       sd_scc_read32(host, priv, SH_MOBILE_SDHI_SCC_CKSEL));
+
+	sd_ctrl_write16(host, CTL_SD_CARD_CLK_CTL, CLK_CTL_SCLKEN |
+			sd_ctrl_read16(host, CTL_SD_CARD_CLK_CTL));
+
+	sd_scc_write32(host, priv, SH_MOBILE_SDHI_SCC_RVSCNTL,
+		       ~SH_MOBILE_SDHI_SCC_RVSCNTL_RVSEN &
+		       sd_scc_read32(host, priv, SH_MOBILE_SDHI_SCC_RVSCNTL));
+
+	sd_scc_write32(host, priv, SH_MOBILE_SDHI_SCC_RVSCNTL,
+		       ~SH_MOBILE_SDHI_SCC_RVSCNTL_RVSEN &
+		       sd_scc_read32(host, priv, SH_MOBILE_SDHI_SCC_RVSCNTL));
+}
+
+static int renesas_sdhi_wait_idle(struct tmio_mmc_host *host)
+{
+	int timeout = 1000;
+
+	while (--timeout && !(sd_ctrl_read16_and_16_as_32(host, CTL_STATUS)
+			      & TMIO_STAT_SCLKDIVEN))
+		udelay(1);
+
+	if (!timeout) {
+		dev_warn(&host->pdev->dev, "timeout waiting for SD bus idle\n");
+		return -EBUSY;
+	}
+
+	return 0;
+}
+
+static int renesas_sdhi_write16_hook(struct tmio_mmc_host *host, int addr)
+{
+	switch (addr)
+	{
+	case CTL_SD_CMD:
+	case CTL_STOP_INTERNAL_ACTION:
+	case CTL_XFER_BLK_COUNT:
+	case CTL_SD_CARD_CLK_CTL:
+	case CTL_SD_XFER_LEN:
+	case CTL_SD_MEM_CARD_OPT:
+	case CTL_TRANSACTION_CTL:
+	case CTL_DMA_ENABLE:
+	case EXT_ACC:
+		return renesas_sdhi_wait_idle(host);
+	}
+
+	return 0;
+}
+
+static int renesas_sdhi_multi_io_quirk(struct mmc_card *card,
+					 unsigned int direction, int blk_size)
+{
+	/*
+	 * In Renesas controllers, when performing a
+	 * multiple block read of one or two blocks,
+	 * depending on the timing with which the
+	 * response register is read, the response
+	 * value may not be read properly.
+	 * Use single block read for this HW bug
+	 */
+	if ((direction == MMC_DATA_READ) &&
+	    blk_size == 2)
+		return 1;
+
+	return blk_size;
+}
+
+static void renesas_sdhi_enable_dma(struct tmio_mmc_host *host, bool enable)
+{
+	sd_ctrl_write16(host, CTL_DMA_ENABLE, enable ? 2 : 0);
+
+	/* enable 32bit access if DMA mode if possibile */
+	renesas_sdhi_sdbuf_width(host, enable ? 32 : 16);
+}
+
+static int renesas_sdhi_probe(struct platform_device *pdev)
+{
+	const struct renesas_sdhi_of_data *of_data = of_device_get_match_data(&pdev->dev);
+	struct renesas_sdhi *priv;
+	struct tmio_mmc_data *mmc_data;
+	struct tmio_mmc_data *mmd = pdev->dev.platform_data;
+	struct tmio_mmc_host *host;
+	struct resource *res;
+	int irq, ret, i;
+	struct tmio_mmc_dma *dma_priv;
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	if (!res)
+		return -EINVAL;
+
+	priv = devm_kzalloc(&pdev->dev, sizeof(struct renesas_sdhi), GFP_KERNEL);
+	if (!priv)
+		return -ENOMEM;
+
+	mmc_data = &priv->mmc_data;
+	dma_priv = &priv->dma_priv;
+
+	priv->clk = devm_clk_get(&pdev->dev, NULL);
+	if (IS_ERR(priv->clk)) {
+		ret = PTR_ERR(priv->clk);
+		dev_err(&pdev->dev, "cannot get clock: %d\n", ret);
+		goto eprobe;
+	}
+
+	priv->pinctrl = devm_pinctrl_get(&pdev->dev);
+	if (!IS_ERR(priv->pinctrl)) {
+		priv->pins_default = pinctrl_lookup_state(priv->pinctrl,
+						PINCTRL_STATE_DEFAULT);
+		priv->pins_uhs = pinctrl_lookup_state(priv->pinctrl,
+						"state_uhs");
+	}
+
+	host = tmio_mmc_host_alloc(pdev);
+	if (!host) {
+		ret = -ENOMEM;
+		goto eprobe;
+	}
+
+
+	if (of_data) {
+		mmc_data->flags |= of_data->tmio_flags;
+		mmc_data->ocr_mask = of_data->tmio_ocr_mask;
+		mmc_data->capabilities |= of_data->capabilities;
+		mmc_data->capabilities2 |= of_data->capabilities2;
+		mmc_data->dma_rx_offset = of_data->dma_rx_offset;
+		dma_priv->dma_buswidth = of_data->dma_buswidth;
+		host->bus_shift = of_data->bus_shift;
+	}
+
+	host->dma		= dma_priv;
+	host->write16_hook	= renesas_sdhi_write16_hook;
+	host->clk_enable	= renesas_sdhi_clk_enable;
+	host->clk_update	= renesas_sdhi_clk_update;
+	host->clk_disable	= renesas_sdhi_clk_disable;
+	host->multi_io_quirk	= renesas_sdhi_multi_io_quirk;
+
+	/* SDR speeds are only available on Gen2+ */
+	if (mmc_data->flags & TMIO_MMC_MIN_RCAR2) {
+		/* card_busy caused issues on r8a73a4 (pre-Gen2) CD-less SDHI */
+		host->card_busy	= renesas_sdhi_card_busy;
+		host->start_signal_voltage_switch =
+			renesas_sdhi_start_signal_voltage_switch;
+	}
+
+	/* Orginally registers were 16 bit apart, could be 32 or 64 nowadays */
+	if (!host->bus_shift && resource_size(res) > 0x100) /* old way to determine the shift */
+		host->bus_shift = 1;
+
+	if (mmd)
+		*mmc_data = *mmd;
+
+	dma_priv->filter = shdma_chan_filter;
+	dma_priv->enable = renesas_sdhi_enable_dma;
+
+	mmc_data->alignment_shift = 1; /* 2-byte alignment */
+	mmc_data->capabilities |= MMC_CAP_MMC_HIGHSPEED;
+
+	/*
+	 * All SDHI blocks support 2-byte and larger block sizes in 4-bit
+	 * bus width mode.
+	 */
+	mmc_data->flags |= TMIO_MMC_BLKSZ_2BYTES;
+
+	/*
+	 * All SDHI blocks support SDIO IRQ signalling.
+	 */
+	mmc_data->flags |= TMIO_MMC_SDIO_IRQ;
+
+	/*
+	 * All SDHI have CMD12 controll bit
+	 */
+	mmc_data->flags |= TMIO_MMC_HAVE_CMD12_CTRL;
+
+	/* All SDHI have SDIO status bits which must be 1 */
+	mmc_data->flags |= TMIO_MMC_SDIO_STATUS_SETBITS;
+
+	ret = tmio_mmc_host_probe(host, mmc_data, renesas_sdhi_get_dma_ops());
+	if (ret < 0)
+		goto efree;
+
+	/* Enable tuning iff we have an SCC and a supported mode */
+	if (of_data && of_data->scc_offset &&
+	    (host->mmc->caps & MMC_CAP_UHS_SDR104 ||
+	     host->mmc->caps2 & MMC_CAP2_HS200_1_8V_SDR)) {
+		const struct renesas_sdhi_scc *taps = of_data->taps;
+		bool hit = false;
+
+		host->mmc->caps |= MMC_CAP_HW_RESET;
+
+		for (i = 0; i < of_data->taps_num; i++) {
+			if (taps[i].clk_rate == 0 ||
+			    taps[i].clk_rate == host->mmc->f_max) {
+				host->scc_tappos = taps->tap;
+				hit = true;
+				break;
+			}
+		}
+
+		if (!hit)
+			dev_warn(&host->pdev->dev, "Unknown clock rate for SDR104\n");
+
+		priv->scc_ctl = host->ctl + of_data->scc_offset;
+		host->init_tuning = renesas_sdhi_init_tuning;
+		host->prepare_tuning = renesas_sdhi_prepare_tuning;
+		host->select_tuning = renesas_sdhi_select_tuning;
+		host->check_scc_error = renesas_sdhi_check_scc_error;
+		host->hw_reset = renesas_sdhi_hw_reset;
+	}
+
+	i = 0;
+	while (1) {
+		irq = platform_get_irq(pdev, i);
+		if (irq < 0)
+			break;
+		i++;
+		ret = devm_request_irq(&pdev->dev, irq, tmio_mmc_irq, 0,
+				  dev_name(&pdev->dev), host);
+		if (ret)
+			goto eirq;
+	}
+
+	/* There must be at least one IRQ source */
+	if (!i) {
+		ret = irq;
+		goto eirq;
+	}
+
+	dev_info(&pdev->dev, "%s base at 0x%08lx max clock rate %u MHz\n",
+		 mmc_hostname(host->mmc), (unsigned long)
+		 (platform_get_resource(pdev, IORESOURCE_MEM, 0)->start),
+		 host->mmc->f_max / 1000000);
+
+	return ret;
+
+eirq:
+	tmio_mmc_host_remove(host);
+efree:
+	tmio_mmc_host_free(host);
+eprobe:
+	return ret;
+}
+
+static int renesas_sdhi_remove(struct platform_device *pdev)
+{
+	struct mmc_host *mmc = platform_get_drvdata(pdev);
+	struct tmio_mmc_host *host = mmc_priv(mmc);
+
+	tmio_mmc_host_remove(host);
+
+	return 0;
+}
+
+static const struct dev_pm_ops tmio_mmc_dev_pm_ops = {
+	SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
+			pm_runtime_force_resume)
+	SET_RUNTIME_PM_OPS(tmio_mmc_host_runtime_suspend,
+			tmio_mmc_host_runtime_resume,
+			NULL)
+};
+
+static struct platform_driver renesas_sdhi_driver = {
+	.driver		= {
+		.name	= "sh_mobile_sdhi",
+		.pm	= &tmio_mmc_dev_pm_ops,
+		.of_match_table = renesas_sdhi_of_match,
+	},
+	.probe		= renesas_sdhi_probe,
+	.remove		= renesas_sdhi_remove,
+};
+
+module_platform_driver(renesas_sdhi_driver);
+
+MODULE_DESCRIPTION("Renesas SDHI driver");
+MODULE_AUTHOR("Magnus Damm");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:sh_mobile_sdhi");
diff --git a/drivers/mmc/host/sh_mobile_sdhi.c b/drivers/mmc/host/sh_mobile_sdhi.c
deleted file mode 100644
index 8ca9860..0000000
--- a/drivers/mmc/host/sh_mobile_sdhi.c
+++ /dev/null
@@ -1,746 +0,0 @@
-/*
- * SuperH Mobile SDHI
- *
- * Copyright (C) 2016 Sang Engineering, Wolfram Sang
- * Copyright (C) 2015-16 Renesas Electronics Corporation
- * Copyright (C) 2009 Magnus Damm
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * Based on "Compaq ASIC3 support":
- *
- * Copyright 2001 Compaq Computer Corporation.
- * Copyright 2004-2005 Phil Blundell
- * Copyright 2007-2008 OpenedHand Ltd.
- *
- * Authors: Phil Blundell <pb@handhelds.org>,
- *	    Samuel Ortiz <sameo@openedhand.com>
- *
- */
-
-#include <linux/kernel.h>
-#include <linux/clk.h>
-#include <linux/slab.h>
-#include <linux/mod_devicetable.h>
-#include <linux/module.h>
-#include <linux/of_device.h>
-#include <linux/platform_device.h>
-#include <linux/mmc/host.h>
-#include <linux/mfd/tmio.h>
-#include <linux/sh_dma.h>
-#include <linux/delay.h>
-#include <linux/pinctrl/consumer.h>
-#include <linux/pinctrl/pinctrl-state.h>
-#include <linux/regulator/consumer.h>
-
-#include "renesas_sdhi.h"
-#include "tmio_mmc.h"
-
-#define EXT_ACC           0xe4
-
-#define SDHI_VER_GEN2_SDR50	0x490c
-/* very old datasheets said 0x490c for SDR104, too. They are wrong! */
-#define SDHI_VER_GEN2_SDR104	0xcb0d
-#define SDHI_VER_GEN3_SD	0xcc10
-#define SDHI_VER_GEN3_SDMMC	0xcd10
-
-#define host_to_priv(host) container_of((host)->pdata, struct sh_mobile_sdhi, mmc_data)
-
-struct sh_mobile_sdhi_scc {
-	unsigned long clk_rate;	/* clock rate for SDR104 */
-	u32 tap;		/* sampling clock position for SDR104 */
-};
-
-struct sh_mobile_sdhi_of_data {
-	unsigned long tmio_flags;
-	u32	      tmio_ocr_mask;
-	unsigned long capabilities;
-	unsigned long capabilities2;
-	enum dma_slave_buswidth dma_buswidth;
-	dma_addr_t dma_rx_offset;
-	unsigned bus_shift;
-	int scc_offset;
-	struct sh_mobile_sdhi_scc *taps;
-	int taps_num;
-};
-
-static const struct sh_mobile_sdhi_of_data sh_mobile_sdhi_of_cfg[] = {
-	{
-		.tmio_flags = TMIO_MMC_HAS_IDLE_WAIT,
-	},
-};
-
-static const struct sh_mobile_sdhi_of_data of_rcar_gen1_compatible = {
-	.tmio_flags	= TMIO_MMC_HAS_IDLE_WAIT | TMIO_MMC_WRPROTECT_DISABLE |
-			  TMIO_MMC_CLK_ACTUAL,
-	.capabilities	= MMC_CAP_SD_HIGHSPEED | MMC_CAP_SDIO_IRQ,
-};
-
-/* Definitions for sampling clocks */
-static struct sh_mobile_sdhi_scc rcar_gen2_scc_taps[] = {
-	{
-		.clk_rate = 156000000,
-		.tap = 0x00000703,
-	},
-	{
-		.clk_rate = 0,
-		.tap = 0x00000300,
-	},
-};
-
-static const struct sh_mobile_sdhi_of_data of_rcar_gen2_compatible = {
-	.tmio_flags	= TMIO_MMC_HAS_IDLE_WAIT | TMIO_MMC_WRPROTECT_DISABLE |
-			  TMIO_MMC_CLK_ACTUAL | TMIO_MMC_MIN_RCAR2,
-	.capabilities	= MMC_CAP_SD_HIGHSPEED | MMC_CAP_SDIO_IRQ,
-	.dma_buswidth	= DMA_SLAVE_BUSWIDTH_4_BYTES,
-	.dma_rx_offset	= 0x2000,
-	.scc_offset	= 0x0300,
-	.taps		= rcar_gen2_scc_taps,
-	.taps_num	= ARRAY_SIZE(rcar_gen2_scc_taps),
-};
-
-/* Definitions for sampling clocks */
-static struct sh_mobile_sdhi_scc rcar_gen3_scc_taps[] = {
-	{
-		.clk_rate = 0,
-		.tap = 0x00000300,
-	},
-};
-
-static const struct sh_mobile_sdhi_of_data of_rcar_gen3_compatible = {
-	.tmio_flags	= TMIO_MMC_HAS_IDLE_WAIT | TMIO_MMC_WRPROTECT_DISABLE |
-			  TMIO_MMC_CLK_ACTUAL | TMIO_MMC_MIN_RCAR2,
-	.capabilities	= MMC_CAP_SD_HIGHSPEED,
-	.bus_shift	= 2,
-	.scc_offset	= 0x1000,
-	.taps		= rcar_gen3_scc_taps,
-	.taps_num	= ARRAY_SIZE(rcar_gen3_scc_taps),
-};
-
-static const struct of_device_id sh_mobile_sdhi_of_match[] = {
-	{ .compatible = "renesas,sdhi-shmobile" },
-	{ .compatible = "renesas,sdhi-sh7372" },
-	{ .compatible = "renesas,sdhi-sh73a0", .data = &sh_mobile_sdhi_of_cfg[0], },
-	{ .compatible = "renesas,sdhi-r8a73a4", .data = &sh_mobile_sdhi_of_cfg[0], },
-	{ .compatible = "renesas,sdhi-r8a7740", .data = &sh_mobile_sdhi_of_cfg[0], },
-	{ .compatible = "renesas,sdhi-r8a7778", .data = &of_rcar_gen1_compatible, },
-	{ .compatible = "renesas,sdhi-r8a7779", .data = &of_rcar_gen1_compatible, },
-	{ .compatible = "renesas,sdhi-r8a7743", .data = &of_rcar_gen2_compatible, },
-	{ .compatible = "renesas,sdhi-r8a7745", .data = &of_rcar_gen2_compatible, },
-	{ .compatible = "renesas,sdhi-r8a7790", .data = &of_rcar_gen2_compatible, },
-	{ .compatible = "renesas,sdhi-r8a7791", .data = &of_rcar_gen2_compatible, },
-	{ .compatible = "renesas,sdhi-r8a7792", .data = &of_rcar_gen2_compatible, },
-	{ .compatible = "renesas,sdhi-r8a7793", .data = &of_rcar_gen2_compatible, },
-	{ .compatible = "renesas,sdhi-r8a7794", .data = &of_rcar_gen2_compatible, },
-	{},
-};
-MODULE_DEVICE_TABLE(of, sh_mobile_sdhi_of_match);
-
-struct sh_mobile_sdhi {
-	struct clk *clk;
-	struct tmio_mmc_data mmc_data;
-	struct tmio_mmc_dma dma_priv;
-	struct pinctrl *pinctrl;
-	struct pinctrl_state *pins_default, *pins_uhs;
-	void __iomem *scc_ctl;
-};
-
-static void sh_mobile_sdhi_sdbuf_width(struct tmio_mmc_host *host, int width)
-{
-	u32 val;
-
-	/*
-	 * see also
-	 *	sh_mobile_sdhi_of_data :: dma_buswidth
-	 */
-	switch (sd_ctrl_read16(host, CTL_VERSION)) {
-	case SDHI_VER_GEN2_SDR50:
-		val = (width == 32) ? 0x0001 : 0x0000;
-		break;
-	case SDHI_VER_GEN2_SDR104:
-		val = (width == 32) ? 0x0000 : 0x0001;
-		break;
-	case SDHI_VER_GEN3_SD:
-	case SDHI_VER_GEN3_SDMMC:
-		if (width == 64)
-			val = 0x0000;
-		else if (width == 32)
-			val = 0x0101;
-		else
-			val = 0x0001;
-		break;
-	default:
-		/* nothing to do */
-		return;
-	}
-
-	sd_ctrl_write16(host, EXT_ACC, val);
-}
-
-static int sh_mobile_sdhi_clk_enable(struct tmio_mmc_host *host)
-{
-	struct mmc_host *mmc = host->mmc;
-	struct sh_mobile_sdhi *priv = host_to_priv(host);
-	int ret = clk_prepare_enable(priv->clk);
-	if (ret < 0)
-		return ret;
-
-	/*
-	 * The clock driver may not know what maximum frequency
-	 * actually works, so it should be set with the max-frequency
-	 * property which will already have been read to f_max.  If it
-	 * was missing, assume the current frequency is the maximum.
-	 */
-	if (!mmc->f_max)
-		mmc->f_max = clk_get_rate(priv->clk);
-
-	/*
-	 * Minimum frequency is the minimum input clock frequency
-	 * divided by our maximum divider.
-	 */
-	mmc->f_min = max(clk_round_rate(priv->clk, 1) / 512, 1L);
-
-	/* enable 16bit data access on SDBUF as default */
-	sh_mobile_sdhi_sdbuf_width(host, 16);
-
-	return 0;
-}
-
-static unsigned int sh_mobile_sdhi_clk_update(struct tmio_mmc_host *host,
-					      unsigned int new_clock)
-{
-	struct sh_mobile_sdhi *priv = host_to_priv(host);
-	unsigned int freq, diff, best_freq = 0, diff_min = ~0;
-	int i, ret;
-
-	/* tested only on RCar Gen2+ currently; may work for others */
-	if (!(host->pdata->flags & TMIO_MMC_MIN_RCAR2))
-		return clk_get_rate(priv->clk);
-
-	/*
-	 * We want the bus clock to be as close as possible to, but no
-	 * greater than, new_clock.  As we can divide by 1 << i for
-	 * any i in [0, 9] we want the input clock to be as close as
-	 * possible, but no greater than, new_clock << i.
-	 */
-	for (i = min(9, ilog2(UINT_MAX / new_clock)); i >= 0; i--) {
-		freq = clk_round_rate(priv->clk, new_clock << i);
-		if (freq > (new_clock << i)) {
-			/* Too fast; look for a slightly slower option */
-			freq = clk_round_rate(priv->clk,
-					      (new_clock << i) / 4 * 3);
-			if (freq > (new_clock << i))
-				continue;
-		}
-
-		diff = new_clock - (freq >> i);
-		if (diff <= diff_min) {
-			best_freq = freq;
-			diff_min = diff;
-		}
-	}
-
-	ret = clk_set_rate(priv->clk, best_freq);
-
-	return ret == 0 ? best_freq : clk_get_rate(priv->clk);
-}
-
-static void sh_mobile_sdhi_clk_disable(struct tmio_mmc_host *host)
-{
-	struct sh_mobile_sdhi *priv = host_to_priv(host);
-
-	clk_disable_unprepare(priv->clk);
-}
-
-static int sh_mobile_sdhi_card_busy(struct mmc_host *mmc)
-{
-	struct tmio_mmc_host *host = mmc_priv(mmc);
-
-	return !(sd_ctrl_read16_and_16_as_32(host, CTL_STATUS) & TMIO_STAT_DAT0);
-}
-
-static int sh_mobile_sdhi_start_signal_voltage_switch(struct mmc_host *mmc,
-						      struct mmc_ios *ios)
-{
-	struct tmio_mmc_host *host = mmc_priv(mmc);
-	struct sh_mobile_sdhi *priv = host_to_priv(host);
-	struct pinctrl_state *pin_state;
-	int ret;
-
-	switch (ios->signal_voltage) {
-	case MMC_SIGNAL_VOLTAGE_330:
-		pin_state = priv->pins_default;
-		break;
-	case MMC_SIGNAL_VOLTAGE_180:
-		pin_state = priv->pins_uhs;
-		break;
-	default:
-		return -EINVAL;
-	}
-
-	/*
-	 * If anything is missing, assume signal voltage is fixed at
-	 * 3.3V and succeed/fail accordingly.
-	 */
-	if (IS_ERR(priv->pinctrl) || IS_ERR(pin_state))
-		return ios->signal_voltage ==
-			MMC_SIGNAL_VOLTAGE_330 ? 0 : -EINVAL;
-
-	ret = mmc_regulator_set_vqmmc(host->mmc, ios);
-	if (ret)
-		return ret;
-
-	ret = pinctrl_select_state(priv->pinctrl, pin_state);
-	if (ret)
-		return ret;
-
-	return 0;
-}
-
-/* SCC registers */
-#define SH_MOBILE_SDHI_SCC_DTCNTL	0x000
-#define SH_MOBILE_SDHI_SCC_TAPSET	0x002
-#define SH_MOBILE_SDHI_SCC_DT2FF	0x004
-#define SH_MOBILE_SDHI_SCC_CKSEL	0x006
-#define SH_MOBILE_SDHI_SCC_RVSCNTL	0x008
-#define SH_MOBILE_SDHI_SCC_RVSREQ	0x00A
-
-/* Definitions for values the SH_MOBILE_SDHI_SCC_DTCNTL register */
-#define SH_MOBILE_SDHI_SCC_DTCNTL_TAPEN		BIT(0)
-#define SH_MOBILE_SDHI_SCC_DTCNTL_TAPNUM_SHIFT	16
-#define SH_MOBILE_SDHI_SCC_DTCNTL_TAPNUM_MASK	0xff
-
-/* Definitions for values the SH_MOBILE_SDHI_SCC_CKSEL register */
-#define SH_MOBILE_SDHI_SCC_CKSEL_DTSEL		BIT(0)
-/* Definitions for values the SH_MOBILE_SDHI_SCC_RVSCNTL register */
-#define SH_MOBILE_SDHI_SCC_RVSCNTL_RVSEN	BIT(0)
-/* Definitions for values the SH_MOBILE_SDHI_SCC_RVSREQ register */
-#define SH_MOBILE_SDHI_SCC_RVSREQ_RVSERR	BIT(2)
-
-static inline u32 sd_scc_read32(struct tmio_mmc_host *host,
-				struct sh_mobile_sdhi *priv, int addr)
-{
-	return readl(priv->scc_ctl + (addr << host->bus_shift));
-}
-
-static inline void sd_scc_write32(struct tmio_mmc_host *host,
-				  struct sh_mobile_sdhi *priv,
-				  int addr, u32 val)
-{
-	writel(val, priv->scc_ctl + (addr << host->bus_shift));
-}
-
-static unsigned int sh_mobile_sdhi_init_tuning(struct tmio_mmc_host *host)
-{
-	struct sh_mobile_sdhi *priv;
-
-	priv = host_to_priv(host);
-
-	/* set sampling clock selection range */
-	sd_scc_write32(host, priv, SH_MOBILE_SDHI_SCC_DTCNTL,
-		       0x8 << SH_MOBILE_SDHI_SCC_DTCNTL_TAPNUM_SHIFT);
-
-	/* Initialize SCC */
-	sd_ctrl_write32_as_16_and_16(host, CTL_STATUS, 0x0);
-
-	sd_scc_write32(host, priv, SH_MOBILE_SDHI_SCC_DTCNTL,
-		       SH_MOBILE_SDHI_SCC_DTCNTL_TAPEN |
-		       sd_scc_read32(host, priv, SH_MOBILE_SDHI_SCC_DTCNTL));
-
-	sd_ctrl_write16(host, CTL_SD_CARD_CLK_CTL, ~CLK_CTL_SCLKEN &
-			sd_ctrl_read16(host, CTL_SD_CARD_CLK_CTL));
-
-	sd_scc_write32(host, priv, SH_MOBILE_SDHI_SCC_CKSEL,
-		       SH_MOBILE_SDHI_SCC_CKSEL_DTSEL |
-		       sd_scc_read32(host, priv, SH_MOBILE_SDHI_SCC_CKSEL));
-
-	sd_ctrl_write16(host, CTL_SD_CARD_CLK_CTL, CLK_CTL_SCLKEN |
-			sd_ctrl_read16(host, CTL_SD_CARD_CLK_CTL));
-
-	sd_scc_write32(host, priv, SH_MOBILE_SDHI_SCC_RVSCNTL,
-		       ~SH_MOBILE_SDHI_SCC_RVSCNTL_RVSEN &
-		       sd_scc_read32(host, priv, SH_MOBILE_SDHI_SCC_RVSCNTL));
-
-	sd_scc_write32(host, priv, SH_MOBILE_SDHI_SCC_DT2FF, host->scc_tappos);
-
-	/* Read TAPNUM */
-	return (sd_scc_read32(host, priv, SH_MOBILE_SDHI_SCC_DTCNTL) >>
-		SH_MOBILE_SDHI_SCC_DTCNTL_TAPNUM_SHIFT) &
-		SH_MOBILE_SDHI_SCC_DTCNTL_TAPNUM_MASK;
-}
-
-static void sh_mobile_sdhi_prepare_tuning(struct tmio_mmc_host *host,
-					 unsigned long tap)
-{
-	struct sh_mobile_sdhi *priv = host_to_priv(host);
-
-	/* Set sampling clock position */
-	sd_scc_write32(host, priv, SH_MOBILE_SDHI_SCC_TAPSET, tap);
-}
-
-#define SH_MOBILE_SDHI_MAX_TAP 3
-
-static int sh_mobile_sdhi_select_tuning(struct tmio_mmc_host *host)
-{
-	struct sh_mobile_sdhi *priv = host_to_priv(host);
-	unsigned long tap_cnt;  /* counter of tuning success */
-	unsigned long tap_set;  /* tap position */
-	unsigned long tap_start;/* start position of tuning success */
-	unsigned long tap_end;  /* end position of tuning success */
-	unsigned long ntap;     /* temporary counter of tuning success */
-	unsigned long i;
-
-	/* Clear SCC_RVSREQ */
-	sd_scc_write32(host, priv, SH_MOBILE_SDHI_SCC_RVSREQ, 0);
-
-	/*
-	 * Find the longest consecutive run of successful probes.  If that
-	 * is more than SH_MOBILE_SDHI_MAX_TAP probes long then use the
-	 * center index as the tap.
-	 */
-	tap_cnt = 0;
-	ntap = 0;
-	tap_start = 0;
-	tap_end = 0;
-	for (i = 0; i < host->tap_num * 2; i++) {
-		if (test_bit(i, host->taps))
-			ntap++;
-		else {
-			if (ntap > tap_cnt) {
-				tap_start = i - ntap;
-				tap_end = i - 1;
-				tap_cnt = ntap;
-			}
-			ntap = 0;
-		}
-	}
-
-	if (ntap > tap_cnt) {
-		tap_start = i - ntap;
-		tap_end = i - 1;
-		tap_cnt = ntap;
-	}
-
-	if (tap_cnt >= SH_MOBILE_SDHI_MAX_TAP)
-		tap_set = (tap_start + tap_end) / 2 % host->tap_num;
-	else
-		return -EIO;
-
-	/* Set SCC */
-	sd_scc_write32(host, priv, SH_MOBILE_SDHI_SCC_TAPSET, tap_set);
-
-	/* Enable auto re-tuning */
-	sd_scc_write32(host, priv, SH_MOBILE_SDHI_SCC_RVSCNTL,
-		       SH_MOBILE_SDHI_SCC_RVSCNTL_RVSEN |
-		       sd_scc_read32(host, priv, SH_MOBILE_SDHI_SCC_RVSCNTL));
-
-	return 0;
-}
-
-
-static bool sh_mobile_sdhi_check_scc_error(struct tmio_mmc_host *host)
-{
-	struct sh_mobile_sdhi *priv = host_to_priv(host);
-
-	/* Check SCC error */
-	if (sd_scc_read32(host, priv, SH_MOBILE_SDHI_SCC_RVSCNTL) &
-	    SH_MOBILE_SDHI_SCC_RVSCNTL_RVSEN &&
-	    sd_scc_read32(host, priv, SH_MOBILE_SDHI_SCC_RVSREQ) &
-	    SH_MOBILE_SDHI_SCC_RVSREQ_RVSERR) {
-		/* Clear SCC error */
-		sd_scc_write32(host, priv, SH_MOBILE_SDHI_SCC_RVSREQ, 0);
-		return true;
-	}
-
-	return false;
-}
-
-static void sh_mobile_sdhi_hw_reset(struct tmio_mmc_host *host)
-{
-	struct sh_mobile_sdhi *priv;
-
-	priv = host_to_priv(host);
-
-	/* Reset SCC */
-	sd_ctrl_write16(host, CTL_SD_CARD_CLK_CTL, ~CLK_CTL_SCLKEN &
-			sd_ctrl_read16(host, CTL_SD_CARD_CLK_CTL));
-
-	sd_scc_write32(host, priv, SH_MOBILE_SDHI_SCC_CKSEL,
-		       ~SH_MOBILE_SDHI_SCC_CKSEL_DTSEL &
-		       sd_scc_read32(host, priv, SH_MOBILE_SDHI_SCC_CKSEL));
-
-	sd_ctrl_write16(host, CTL_SD_CARD_CLK_CTL, CLK_CTL_SCLKEN |
-			sd_ctrl_read16(host, CTL_SD_CARD_CLK_CTL));
-
-	sd_scc_write32(host, priv, SH_MOBILE_SDHI_SCC_RVSCNTL,
-		       ~SH_MOBILE_SDHI_SCC_RVSCNTL_RVSEN &
-		       sd_scc_read32(host, priv, SH_MOBILE_SDHI_SCC_RVSCNTL));
-
-	sd_scc_write32(host, priv, SH_MOBILE_SDHI_SCC_RVSCNTL,
-		       ~SH_MOBILE_SDHI_SCC_RVSCNTL_RVSEN &
-		       sd_scc_read32(host, priv, SH_MOBILE_SDHI_SCC_RVSCNTL));
-}
-
-static int sh_mobile_sdhi_wait_idle(struct tmio_mmc_host *host)
-{
-	int timeout = 1000;
-
-	while (--timeout && !(sd_ctrl_read16_and_16_as_32(host, CTL_STATUS)
-			      & TMIO_STAT_SCLKDIVEN))
-		udelay(1);
-
-	if (!timeout) {
-		dev_warn(&host->pdev->dev, "timeout waiting for SD bus idle\n");
-		return -EBUSY;
-	}
-
-	return 0;
-}
-
-static int sh_mobile_sdhi_write16_hook(struct tmio_mmc_host *host, int addr)
-{
-	switch (addr)
-	{
-	case CTL_SD_CMD:
-	case CTL_STOP_INTERNAL_ACTION:
-	case CTL_XFER_BLK_COUNT:
-	case CTL_SD_CARD_CLK_CTL:
-	case CTL_SD_XFER_LEN:
-	case CTL_SD_MEM_CARD_OPT:
-	case CTL_TRANSACTION_CTL:
-	case CTL_DMA_ENABLE:
-		return sh_mobile_sdhi_wait_idle(host);
-	}
-
-	return 0;
-}
-
-static int sh_mobile_sdhi_multi_io_quirk(struct mmc_card *card,
-					 unsigned int direction, int blk_size)
-{
-	/*
-	 * In Renesas controllers, when performing a
-	 * multiple block read of one or two blocks,
-	 * depending on the timing with which the
-	 * response register is read, the response
-	 * value may not be read properly.
-	 * Use single block read for this HW bug
-	 */
-	if ((direction == MMC_DATA_READ) &&
-	    blk_size == 2)
-		return 1;
-
-	return blk_size;
-}
-
-static void sh_mobile_sdhi_enable_dma(struct tmio_mmc_host *host, bool enable)
-{
-	sd_ctrl_write16(host, CTL_DMA_ENABLE, enable ? 2 : 0);
-
-	/* enable 32bit access if DMA mode if possibile */
-	sh_mobile_sdhi_sdbuf_width(host, enable ? 32 : 16);
-}
-
-static int sh_mobile_sdhi_probe(struct platform_device *pdev)
-{
-	const struct sh_mobile_sdhi_of_data *of_data = of_device_get_match_data(&pdev->dev);
-	struct sh_mobile_sdhi *priv;
-	struct tmio_mmc_data *mmc_data;
-	struct tmio_mmc_data *mmd = pdev->dev.platform_data;
-	struct tmio_mmc_host *host;
-	struct resource *res;
-	int irq, ret, i;
-	struct tmio_mmc_dma *dma_priv;
-
-	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (!res)
-		return -EINVAL;
-
-	priv = devm_kzalloc(&pdev->dev, sizeof(struct sh_mobile_sdhi), GFP_KERNEL);
-	if (!priv)
-		return -ENOMEM;
-
-	mmc_data = &priv->mmc_data;
-	dma_priv = &priv->dma_priv;
-
-	priv->clk = devm_clk_get(&pdev->dev, NULL);
-	if (IS_ERR(priv->clk)) {
-		ret = PTR_ERR(priv->clk);
-		dev_err(&pdev->dev, "cannot get clock: %d\n", ret);
-		goto eprobe;
-	}
-
-	priv->pinctrl = devm_pinctrl_get(&pdev->dev);
-	if (!IS_ERR(priv->pinctrl)) {
-		priv->pins_default = pinctrl_lookup_state(priv->pinctrl,
-						PINCTRL_STATE_DEFAULT);
-		priv->pins_uhs = pinctrl_lookup_state(priv->pinctrl,
-						"state_uhs");
-	}
-
-	host = tmio_mmc_host_alloc(pdev);
-	if (!host) {
-		ret = -ENOMEM;
-		goto eprobe;
-	}
-
-
-	if (of_data) {
-		mmc_data->flags |= of_data->tmio_flags;
-		mmc_data->ocr_mask = of_data->tmio_ocr_mask;
-		mmc_data->capabilities |= of_data->capabilities;
-		mmc_data->capabilities2 |= of_data->capabilities2;
-		mmc_data->dma_rx_offset = of_data->dma_rx_offset;
-		dma_priv->dma_buswidth = of_data->dma_buswidth;
-		host->bus_shift = of_data->bus_shift;
-	}
-
-	host->dma		= dma_priv;
-	host->write16_hook	= sh_mobile_sdhi_write16_hook;
-	host->clk_enable	= sh_mobile_sdhi_clk_enable;
-	host->clk_update	= sh_mobile_sdhi_clk_update;
-	host->clk_disable	= sh_mobile_sdhi_clk_disable;
-	host->multi_io_quirk	= sh_mobile_sdhi_multi_io_quirk;
-
-	/* SDR speeds are only available on Gen2+ */
-	if (mmc_data->flags & TMIO_MMC_MIN_RCAR2) {
-		/* card_busy caused issues on r8a73a4 (pre-Gen2) CD-less SDHI */
-		host->card_busy	= sh_mobile_sdhi_card_busy;
-		host->start_signal_voltage_switch =
-			sh_mobile_sdhi_start_signal_voltage_switch;
-	}
-
-	/* Orginally registers were 16 bit apart, could be 32 or 64 nowadays */
-	if (!host->bus_shift && resource_size(res) > 0x100) /* old way to determine the shift */
-		host->bus_shift = 1;
-
-	if (mmd)
-		*mmc_data = *mmd;
-
-	dma_priv->filter = shdma_chan_filter;
-	dma_priv->enable = sh_mobile_sdhi_enable_dma;
-
-	mmc_data->alignment_shift = 1; /* 2-byte alignment */
-	mmc_data->capabilities |= MMC_CAP_MMC_HIGHSPEED;
-
-	/*
-	 * All SDHI blocks support 2-byte and larger block sizes in 4-bit
-	 * bus width mode.
-	 */
-	mmc_data->flags |= TMIO_MMC_BLKSZ_2BYTES;
-
-	/*
-	 * All SDHI blocks support SDIO IRQ signalling.
-	 */
-	mmc_data->flags |= TMIO_MMC_SDIO_IRQ;
-
-	/*
-	 * All SDHI have CMD12 controll bit
-	 */
-	mmc_data->flags |= TMIO_MMC_HAVE_CMD12_CTRL;
-
-	/* All SDHI have SDIO status bits which must be 1 */
-	mmc_data->flags |= TMIO_MMC_SDIO_STATUS_SETBITS;
-
-	ret = tmio_mmc_host_probe(host, mmc_data, renesas_sdhi_get_dma_ops());
-	if (ret < 0)
-		goto efree;
-
-	/* Enable tuning iff we have an SCC and a supported mode */
-	if (of_data && of_data->scc_offset &&
-	    (host->mmc->caps & MMC_CAP_UHS_SDR104 ||
-	     host->mmc->caps2 & MMC_CAP2_HS200_1_8V_SDR)) {
-		const struct sh_mobile_sdhi_scc *taps = of_data->taps;
-		bool hit = false;
-
-		host->mmc->caps |= MMC_CAP_HW_RESET;
-
-		for (i = 0; i < of_data->taps_num; i++) {
-			if (taps[i].clk_rate == 0 ||
-			    taps[i].clk_rate == host->mmc->f_max) {
-				host->scc_tappos = taps->tap;
-				hit = true;
-				break;
-			}
-		}
-
-		if (!hit)
-			dev_warn(&host->pdev->dev, "Unknown clock rate for SDR104\n");
-
-		priv->scc_ctl = host->ctl + of_data->scc_offset;
-		host->init_tuning = sh_mobile_sdhi_init_tuning;
-		host->prepare_tuning = sh_mobile_sdhi_prepare_tuning;
-		host->select_tuning = sh_mobile_sdhi_select_tuning;
-		host->check_scc_error = sh_mobile_sdhi_check_scc_error;
-		host->hw_reset = sh_mobile_sdhi_hw_reset;
-	}
-
-	i = 0;
-	while (1) {
-		irq = platform_get_irq(pdev, i);
-		if (irq < 0)
-			break;
-		i++;
-		ret = devm_request_irq(&pdev->dev, irq, tmio_mmc_irq, 0,
-				  dev_name(&pdev->dev), host);
-		if (ret)
-			goto eirq;
-	}
-
-	/* There must be at least one IRQ source */
-	if (!i) {
-		ret = irq;
-		goto eirq;
-	}
-
-	dev_info(&pdev->dev, "%s base at 0x%08lx max clock rate %u MHz\n",
-		 mmc_hostname(host->mmc), (unsigned long)
-		 (platform_get_resource(pdev, IORESOURCE_MEM, 0)->start),
-		 host->mmc->f_max / 1000000);
-
-	return ret;
-
-eirq:
-	tmio_mmc_host_remove(host);
-efree:
-	tmio_mmc_host_free(host);
-eprobe:
-	return ret;
-}
-
-static int sh_mobile_sdhi_remove(struct platform_device *pdev)
-{
-	struct mmc_host *mmc = platform_get_drvdata(pdev);
-	struct tmio_mmc_host *host = mmc_priv(mmc);
-
-	tmio_mmc_host_remove(host);
-
-	return 0;
-}
-
-static const struct dev_pm_ops tmio_mmc_dev_pm_ops = {
-	SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
-			pm_runtime_force_resume)
-	SET_RUNTIME_PM_OPS(tmio_mmc_host_runtime_suspend,
-			tmio_mmc_host_runtime_resume,
-			NULL)
-};
-
-static struct platform_driver sh_mobile_sdhi_driver = {
-	.driver		= {
-		.name	= "sh_mobile_sdhi",
-		.pm	= &tmio_mmc_dev_pm_ops,
-		.of_match_table = sh_mobile_sdhi_of_match,
-	},
-	.probe		= sh_mobile_sdhi_probe,
-	.remove		= sh_mobile_sdhi_remove,
-};
-
-module_platform_driver(sh_mobile_sdhi_driver);
-
-MODULE_DESCRIPTION("SuperH Mobile SDHI driver");
-MODULE_AUTHOR("Magnus Damm");
-MODULE_LICENSE("GPL v2");
-MODULE_ALIAS("platform:sh_mobile_sdhi");
-- 
2.7.4

[cip-dev] [PATCH 4.4.y-cip 69/83] mmc: renesas-sdhi: make renesas_sdhi_sys_dmac main module file

[Biju Das]

From: Simon Horman <horms+renesas@verge.net.au>

commit 9d08428afb722fedaea699a32aaf603a8f1ebd5a upstream.

Make renesas_sdhi_sys_dmac.c a top-level module file that makes use of
library code supplied by renesas_sdhi_core.c

This is in order to facilitate adding other variants of SDHI;
in particular SDHI using different DMA controllers.

Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
[Arnd: Fixed module build error]
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Biju Das <biju.das@bp.renesas.com>
[ Backported to 4.4 Kernel ]
---
 drivers/mmc/host/renesas_sdhi.h          |  23 +++++-
 drivers/mmc/host/renesas_sdhi_core.c     | 128 ++-----------------------------
 drivers/mmc/host/renesas_sdhi_sys_dmac.c | 109 +++++++++++++++++++++++++-
 3 files changed, 135 insertions(+), 125 deletions(-)

diff --git a/drivers/mmc/host/renesas_sdhi.h b/drivers/mmc/host/renesas_sdhi.h
index f65d936c..eb3ea15 100644
--- a/drivers/mmc/host/renesas_sdhi.h
+++ b/drivers/mmc/host/renesas_sdhi.h
@@ -12,7 +12,28 @@
 #ifndef RENESAS_SDHI_H
 #define RENESAS_SDHI_H
 
+#include <linux/platform_device.h>
 #include "tmio_mmc.h"
 
-const struct tmio_mmc_dma_ops *renesas_sdhi_get_dma_ops(void);
+struct renesas_sdhi_scc {
+	unsigned long clk_rate;	/* clock rate for SDR104 */
+	u32 tap;		/* sampling clock position for SDR104 */
+};
+
+struct renesas_sdhi_of_data {
+	unsigned long tmio_flags;
+	u32	      tmio_ocr_mask;
+	unsigned long capabilities;
+	unsigned long capabilities2;
+	enum dma_slave_buswidth dma_buswidth;
+	dma_addr_t dma_rx_offset;
+	unsigned bus_shift;
+	int scc_offset;
+	struct renesas_sdhi_scc *taps;
+	int taps_num;
+};
+
+int renesas_sdhi_probe(struct platform_device *pdev,
+                       const struct tmio_mmc_dma_ops *dma_ops);
+int renesas_sdhi_remove(struct platform_device *pdev);
 #endif
diff --git a/drivers/mmc/host/renesas_sdhi_core.c b/drivers/mmc/host/renesas_sdhi_core.c
index ee60e90..36e2f61 100644
--- a/drivers/mmc/host/renesas_sdhi_core.c
+++ b/drivers/mmc/host/renesas_sdhi_core.c
@@ -1,5 +1,5 @@
 /*
- * SuperH Mobile SDHI
+ * Renesas SDHI
  *
  * Copyright (C) 2016 Sang Engineering, Wolfram Sang
  * Copyright (C) 2015-16 Renesas Electronics Corporation
@@ -23,8 +23,6 @@
 #include <linux/kernel.h>
 #include <linux/clk.h>
 #include <linux/slab.h>
-#include <linux/mod_devicetable.h>
-#include <linux/module.h>
 #include <linux/of_device.h>
 #include <linux/platform_device.h>
 #include <linux/mmc/host.h>
@@ -48,94 +46,6 @@
 
 #define host_to_priv(host) container_of((host)->pdata, struct renesas_sdhi, mmc_data)
 
-struct renesas_sdhi_scc {
-	unsigned long clk_rate;	/* clock rate for SDR104 */
-	u32 tap;		/* sampling clock position for SDR104 */
-};
-
-struct renesas_sdhi_of_data {
-	unsigned long tmio_flags;
-	u32	      tmio_ocr_mask;
-	unsigned long capabilities;
-	unsigned long capabilities2;
-	enum dma_slave_buswidth dma_buswidth;
-	dma_addr_t dma_rx_offset;
-	unsigned bus_shift;
-	int scc_offset;
-	struct renesas_sdhi_scc *taps;
-	int taps_num;
-};
-
-static const struct renesas_sdhi_of_data of_default_cfg = {
-	.tmio_flags = TMIO_MMC_HAS_IDLE_WAIT,
-};
-
-static const struct renesas_sdhi_of_data of_rcar_gen1_compatible = {
-	.tmio_flags	= TMIO_MMC_HAS_IDLE_WAIT | TMIO_MMC_WRPROTECT_DISABLE |
-			  TMIO_MMC_CLK_ACTUAL,
-	.capabilities	= MMC_CAP_SD_HIGHSPEED | MMC_CAP_SDIO_IRQ,
-};
-
-/* Definitions for sampling clocks */
-static struct renesas_sdhi_scc rcar_gen2_scc_taps[] = {
-	{
-		.clk_rate = 156000000,
-		.tap = 0x00000703,
-	},
-	{
-		.clk_rate = 0,
-		.tap = 0x00000300,
-	},
-};
-
-static const struct renesas_sdhi_of_data of_rcar_gen2_compatible = {
-	.tmio_flags	= TMIO_MMC_HAS_IDLE_WAIT | TMIO_MMC_WRPROTECT_DISABLE |
-			  TMIO_MMC_CLK_ACTUAL | TMIO_MMC_MIN_RCAR2,
-	.capabilities	= MMC_CAP_SD_HIGHSPEED | MMC_CAP_SDIO_IRQ,
-	.dma_buswidth	= DMA_SLAVE_BUSWIDTH_4_BYTES,
-	.dma_rx_offset	= 0x2000,
-	.scc_offset	= 0x0300,
-	.taps		= rcar_gen2_scc_taps,
-	.taps_num	= ARRAY_SIZE(rcar_gen2_scc_taps),
-};
-
-/* Definitions for sampling clocks */
-static struct renesas_sdhi_scc rcar_gen3_scc_taps[] = {
-	{
-		.clk_rate = 0,
-		.tap = 0x00000300,
-	},
-};
-
-static const struct renesas_sdhi_of_data of_rcar_gen3_compatible = {
-	.tmio_flags	= TMIO_MMC_HAS_IDLE_WAIT | TMIO_MMC_WRPROTECT_DISABLE |
-			  TMIO_MMC_CLK_ACTUAL | TMIO_MMC_MIN_RCAR2,
-	.capabilities	= MMC_CAP_SD_HIGHSPEED | MMC_CAP_SDIO_IRQ,
-	.bus_shift	= 2,
-	.scc_offset	= 0x1000,
-	.taps		= rcar_gen3_scc_taps,
-	.taps_num	= ARRAY_SIZE(rcar_gen3_scc_taps),
-};
-
-static const struct of_device_id renesas_sdhi_of_match[] = {
-	{ .compatible = "renesas,sdhi-shmobile" },
-	{ .compatible = "renesas,sdhi-sh7372" },
-	{ .compatible = "renesas,sdhi-sh73a0", .data = &of_default_cfg, },
-	{ .compatible = "renesas,sdhi-r8a73a4", .data = &of_default_cfg, },
-	{ .compatible = "renesas,sdhi-r8a7740", .data = &of_default_cfg, },
-	{ .compatible = "renesas,sdhi-r8a7778", .data = &of_rcar_gen1_compatible, },
-	{ .compatible = "renesas,sdhi-r8a7779", .data = &of_rcar_gen1_compatible, },
-	{ .compatible = "renesas,sdhi-r8a7743", .data = &of_rcar_gen2_compatible, },
-	{ .compatible = "renesas,sdhi-r8a7745", .data = &of_rcar_gen2_compatible, },
-	{ .compatible = "renesas,sdhi-r8a7790", .data = &of_rcar_gen2_compatible, },
-	{ .compatible = "renesas,sdhi-r8a7791", .data = &of_rcar_gen2_compatible, },
-	{ .compatible = "renesas,sdhi-r8a7792", .data = &of_rcar_gen2_compatible, },
-	{ .compatible = "renesas,sdhi-r8a7793", .data = &of_rcar_gen2_compatible, },
-	{ .compatible = "renesas,sdhi-r8a7794", .data = &of_rcar_gen2_compatible, },
-	{},
-};
-MODULE_DEVICE_TABLE(of, renesas_sdhi_of_match);
-
 struct renesas_sdhi {
 	struct clk *clk;
 	struct tmio_mmc_data mmc_data;
@@ -538,9 +448,10 @@ static void renesas_sdhi_enable_dma(struct tmio_mmc_host *host, bool enable)
 	renesas_sdhi_sdbuf_width(host, enable ? 32 : 16);
 }
 
-static int renesas_sdhi_probe(struct platform_device *pdev)
+int renesas_sdhi_probe(struct platform_device *pdev,
+		       const struct tmio_mmc_dma_ops *dma_ops)
 {
-	const struct renesas_sdhi_of_data *of_data = of_device_get_match_data(&pdev->dev);
+	const struct renesas_sdhi_of_data *of_data = of_device_get_match_data( &pdev->dev);
 	struct renesas_sdhi *priv;
 	struct tmio_mmc_data *mmc_data;
 	struct tmio_mmc_data *mmd = pdev->dev.platform_data;
@@ -639,7 +550,7 @@ static int renesas_sdhi_probe(struct platform_device *pdev)
 	/* All SDHI have SDIO status bits which must be 1 */
 	mmc_data->flags |= TMIO_MMC_SDIO_STATUS_SETBITS;
 
-	ret = tmio_mmc_host_probe(host, mmc_data, renesas_sdhi_get_dma_ops());
+	ret = tmio_mmc_host_probe(host, mmc_data, dma_ops);
 	if (ret < 0)
 		goto efree;
 
@@ -704,8 +615,9 @@ efree:
 eprobe:
 	return ret;
 }
+EXPORT_SYMBOL_GPL(renesas_sdhi_probe);
 
-static int renesas_sdhi_remove(struct platform_device *pdev)
+int renesas_sdhi_remove(struct platform_device *pdev)
 {
 	struct mmc_host *mmc = platform_get_drvdata(pdev);
 	struct tmio_mmc_host *host = mmc_priv(mmc);
@@ -714,28 +626,4 @@ static int renesas_sdhi_remove(struct platform_device *pdev)
 
 	return 0;
 }
-
-static const struct dev_pm_ops tmio_mmc_dev_pm_ops = {
-	SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
-			pm_runtime_force_resume)
-	SET_RUNTIME_PM_OPS(tmio_mmc_host_runtime_suspend,
-			tmio_mmc_host_runtime_resume,
-			NULL)
-};
-
-static struct platform_driver renesas_sdhi_driver = {
-	.driver		= {
-		.name	= "sh_mobile_sdhi",
-		.pm	= &tmio_mmc_dev_pm_ops,
-		.of_match_table = renesas_sdhi_of_match,
-	},
-	.probe		= renesas_sdhi_probe,
-	.remove		= renesas_sdhi_remove,
-};
-
-module_platform_driver(renesas_sdhi_driver);
-
-MODULE_DESCRIPTION("Renesas SDHI driver");
-MODULE_AUTHOR("Magnus Damm");
-MODULE_LICENSE("GPL v2");
-MODULE_ALIAS("platform:sh_mobile_sdhi");
+EXPORT_SYMBOL_GPL(renesas_sdhi_remove);
diff --git a/drivers/mmc/host/renesas_sdhi_sys_dmac.c b/drivers/mmc/host/renesas_sdhi_sys_dmac.c
index ca96e33..82a37d1 100644
--- a/drivers/mmc/host/renesas_sdhi_sys_dmac.c
+++ b/drivers/mmc/host/renesas_sdhi_sys_dmac.c
@@ -13,13 +13,86 @@
 #include <linux/dmaengine.h>
 #include <linux/mfd/tmio.h>
 #include <linux/mmc/host.h>
+#include <linux/mod_devicetable.h>
+#include <linux/module.h>
 #include <linux/pagemap.h>
 #include <linux/scatterlist.h>
 
+#include "renesas_sdhi.h"
 #include "tmio_mmc.h"
 
 #define TMIO_MMC_MIN_DMA_LEN 8
 
+static const struct renesas_sdhi_of_data of_default_cfg = {
+	.tmio_flags = TMIO_MMC_HAS_IDLE_WAIT,
+};
+
+static const struct renesas_sdhi_of_data of_rcar_gen1_compatible = {
+	.tmio_flags	= TMIO_MMC_HAS_IDLE_WAIT | TMIO_MMC_WRPROTECT_DISABLE |
+			  TMIO_MMC_CLK_ACTUAL,
+	.capabilities	= MMC_CAP_SD_HIGHSPEED | MMC_CAP_SDIO_IRQ,
+};
+
+/* Definitions for sampling clocks */
+static struct renesas_sdhi_scc rcar_gen2_scc_taps[] = {
+	{
+		.clk_rate = 156000000,
+		.tap = 0x00000703,
+	},
+	{
+		.clk_rate = 0,
+		.tap = 0x00000300,
+	},
+};
+
+static const struct renesas_sdhi_of_data of_rcar_gen2_compatible = {
+	.tmio_flags	= TMIO_MMC_HAS_IDLE_WAIT | TMIO_MMC_WRPROTECT_DISABLE |
+			  TMIO_MMC_CLK_ACTUAL | TMIO_MMC_MIN_RCAR2,
+	.capabilities	= MMC_CAP_SD_HIGHSPEED | MMC_CAP_SDIO_IRQ,
+	.dma_buswidth	= DMA_SLAVE_BUSWIDTH_4_BYTES,
+	.dma_rx_offset	= 0x2000,
+	.scc_offset	= 0x0300,
+	.taps		= rcar_gen2_scc_taps,
+	.taps_num	= ARRAY_SIZE(rcar_gen2_scc_taps),
+};
+
+/* Definitions for sampling clocks */
+static struct renesas_sdhi_scc rcar_gen3_scc_taps[] = {
+	{
+		.clk_rate = 0,
+		.tap = 0x00000300,
+	},
+};
+
+static const struct renesas_sdhi_of_data of_rcar_gen3_compatible = {
+	.tmio_flags	= TMIO_MMC_HAS_IDLE_WAIT | TMIO_MMC_WRPROTECT_DISABLE |
+			  TMIO_MMC_CLK_ACTUAL | TMIO_MMC_MIN_RCAR2,
+	.capabilities	= MMC_CAP_SD_HIGHSPEED | MMC_CAP_SDIO_IRQ,
+	.bus_shift	= 2,
+	.scc_offset	= 0x1000,
+	.taps		= rcar_gen3_scc_taps,
+	.taps_num	= ARRAY_SIZE(rcar_gen3_scc_taps),
+};
+
+static const struct of_device_id renesas_sdhi_sys_dmac_of_match[] = {
+	{ .compatible = "renesas,sdhi-shmobile" },
+	{ .compatible = "renesas,sdhi-sh73a0", .data = &of_default_cfg, },
+	{ .compatible = "renesas,sdhi-r8a73a4", .data = &of_default_cfg, },
+	{ .compatible = "renesas,sdhi-r8a7740", .data = &of_default_cfg, },
+	{ .compatible = "renesas,sdhi-r8a7778", .data = &of_rcar_gen1_compatible, },
+	{ .compatible = "renesas,sdhi-r8a7779", .data = &of_rcar_gen1_compatible, },
+	{ .compatible = "renesas,sdhi-r8a7743", .data = &of_rcar_gen2_compatible, },
+	{ .compatible = "renesas,sdhi-r8a7745", .data = &of_rcar_gen2_compatible, },
+	{ .compatible = "renesas,sdhi-r8a7790", .data = &of_rcar_gen2_compatible, },
+	{ .compatible = "renesas,sdhi-r8a7791", .data = &of_rcar_gen2_compatible, },
+	{ .compatible = "renesas,sdhi-r8a7792", .data = &of_rcar_gen2_compatible, },
+	{ .compatible = "renesas,sdhi-r8a7793", .data = &of_rcar_gen2_compatible, },
+	{ .compatible = "renesas,sdhi-r8a7794", .data = &of_rcar_gen2_compatible, },
+	{},
+};
+MODULE_DEVICE_TABLE(of, renesas_sdhi_sys_dmac_of_match);
+
+
 static void renesas_sdhi_sys_dmac_enable_dma(struct tmio_mmc_host *host,
 					     bool enable)
 {
@@ -46,8 +119,6 @@ static void renesas_sdhi_sys_dmac_dma_callback(void *arg)
 {
 	struct tmio_mmc_host *host = arg;
 
-	wait_for_completion(&host->dma_dataend);
-
 	spin_lock_irq(&host->lock);
 
 	if (!host->data)
@@ -62,6 +133,11 @@ static void renesas_sdhi_sys_dmac_dma_callback(void *arg)
 			     host->sg_ptr, host->sg_len,
 			     DMA_TO_DEVICE);
 
+	spin_unlock_irq(&host->lock);
+
+	wait_for_completion(&host->dma_dataend);
+
+	spin_lock_irq(&host->lock);
 	tmio_mmc_do_data_irq(host);
 out:
 	spin_unlock_irq(&host->lock);
@@ -362,7 +438,32 @@ static const struct tmio_mmc_dma_ops renesas_sdhi_sys_dmac_dma_ops = {
 	.abort = renesas_sdhi_sys_dmac_abort_dma,
 };
 
-const struct tmio_mmc_dma_ops *renesas_sdhi_get_dma_ops(void)
+static int renesas_sdhi_sys_dmac_probe(struct platform_device *pdev)
 {
-	return &renesas_sdhi_sys_dmac_dma_ops;
+	return renesas_sdhi_probe(pdev, &renesas_sdhi_sys_dmac_dma_ops);
 }
+
+static const struct dev_pm_ops renesas_sdhi_sys_dmac_dev_pm_ops = {
+	SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
+			pm_runtime_force_resume)
+	SET_RUNTIME_PM_OPS(tmio_mmc_host_runtime_suspend,
+			tmio_mmc_host_runtime_resume,
+			NULL)
+};
+
+static struct platform_driver renesas_sys_dmac_sdhi_driver = {
+	.driver		= {
+		.name	= "sh_mobile_sdhi",
+		.pm	= &renesas_sdhi_sys_dmac_dev_pm_ops,
+		.of_match_table = renesas_sdhi_sys_dmac_of_match,
+	},
+	.probe		= renesas_sdhi_sys_dmac_probe,
+	.remove		= renesas_sdhi_remove,
+};
+
+module_platform_driver(renesas_sys_dmac_sdhi_driver);
+
+MODULE_DESCRIPTION("Renesas SDHI driver");
+MODULE_AUTHOR("Magnus Damm");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:sh_mobile_sdhi");
-- 
2.7.4

[cip-dev] [PATCH 4.4.y-cip 70/83] mmc: renesas-sdhi: improve checkpatch cleanness

[Biju Das]

From: Simon Horman <horms+renesas@verge.net.au>

commit 2fe35968feccaee61413edbe54bec66bc80a67a7 upstream.

Trivial updates to improve checkpatch cleanness.

Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Tested-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Biju Das <biju.das@bp.renesas.com>
---
 drivers/mmc/host/renesas_sdhi.h          |  2 +-
 drivers/mmc/host/renesas_sdhi_core.c     | 43 ++++++++++++++++----------------
 drivers/mmc/host/renesas_sdhi_sys_dmac.c | 25 +++++++++++--------
 3 files changed, 37 insertions(+), 33 deletions(-)

diff --git a/drivers/mmc/host/renesas_sdhi.h b/drivers/mmc/host/renesas_sdhi.h
index eb3ea15..781fe4c 100644
--- a/drivers/mmc/host/renesas_sdhi.h
+++ b/drivers/mmc/host/renesas_sdhi.h
@@ -34,6 +34,6 @@ struct renesas_sdhi_of_data {
 };
 
 int renesas_sdhi_probe(struct platform_device *pdev,
-                       const struct tmio_mmc_dma_ops *dma_ops);
+		       const struct tmio_mmc_dma_ops *dma_ops);
 int renesas_sdhi_remove(struct platform_device *pdev);
 #endif
diff --git a/drivers/mmc/host/renesas_sdhi_core.c b/drivers/mmc/host/renesas_sdhi_core.c
index 36e2f61..a64a3ba 100644
--- a/drivers/mmc/host/renesas_sdhi_core.c
+++ b/drivers/mmc/host/renesas_sdhi_core.c
@@ -44,7 +44,8 @@
 #define SDHI_VER_GEN3_SD	0xcc10
 #define SDHI_VER_GEN3_SDMMC	0xcd10
 
-#define host_to_priv(host) container_of((host)->pdata, struct renesas_sdhi, mmc_data)
+#define host_to_priv(host) \
+	container_of((host)->pdata, struct renesas_sdhi, mmc_data)
 
 struct renesas_sdhi {
 	struct clk *clk;
@@ -92,6 +93,7 @@ static int renesas_sdhi_clk_enable(struct tmio_mmc_host *host)
 	struct mmc_host *mmc = host->mmc;
 	struct renesas_sdhi *priv = host_to_priv(host);
 	int ret = clk_prepare_enable(priv->clk);
+
 	if (ret < 0)
 		return ret;
 
@@ -117,7 +119,7 @@ static int renesas_sdhi_clk_enable(struct tmio_mmc_host *host)
 }
 
 static unsigned int renesas_sdhi_clk_update(struct tmio_mmc_host *host,
-					      unsigned int new_clock)
+					    unsigned int new_clock)
 {
 	struct renesas_sdhi *priv = host_to_priv(host);
 	unsigned int freq, diff, best_freq = 0, diff_min = ~0;
@@ -166,11 +168,12 @@ static int renesas_sdhi_card_busy(struct mmc_host *mmc)
 {
 	struct tmio_mmc_host *host = mmc_priv(mmc);
 
-	return !(sd_ctrl_read16_and_16_as_32(host, CTL_STATUS) & TMIO_STAT_DAT0);
+	return !(sd_ctrl_read16_and_16_as_32(host, CTL_STATUS) &
+		 TMIO_STAT_DAT0);
 }
 
 static int renesas_sdhi_start_signal_voltage_switch(struct mmc_host *mmc,
-						      struct mmc_ios *ios)
+						    struct mmc_ios *ios)
 {
 	struct tmio_mmc_host *host = mmc_priv(mmc);
 	struct renesas_sdhi *priv = host_to_priv(host);
@@ -276,7 +279,7 @@ static unsigned int renesas_sdhi_init_tuning(struct tmio_mmc_host *host)
 }
 
 static void renesas_sdhi_prepare_tuning(struct tmio_mmc_host *host,
-					 unsigned long tap)
+					unsigned long tap)
 {
 	struct renesas_sdhi *priv = host_to_priv(host);
 
@@ -309,9 +312,9 @@ static int renesas_sdhi_select_tuning(struct tmio_mmc_host *host)
 	tap_start = 0;
 	tap_end = 0;
 	for (i = 0; i < host->tap_num * 2; i++) {
-		if (test_bit(i, host->taps))
+		if (test_bit(i, host->taps)) {
 			ntap++;
-		else {
+		} else {
 			if (ntap > tap_cnt) {
 				tap_start = i - ntap;
 				tap_end = i - 1;
@@ -343,7 +346,6 @@ static int renesas_sdhi_select_tuning(struct tmio_mmc_host *host)
 	return 0;
 }
 
-
 static bool renesas_sdhi_check_scc_error(struct tmio_mmc_host *host)
 {
 	struct renesas_sdhi *priv = host_to_priv(host);
@@ -405,8 +407,7 @@ static int renesas_sdhi_wait_idle(struct tmio_mmc_host *host)
 
 static int renesas_sdhi_write16_hook(struct tmio_mmc_host *host, int addr)
 {
-	switch (addr)
-	{
+	switch (addr) {
 	case CTL_SD_CMD:
 	case CTL_STOP_INTERNAL_ACTION:
 	case CTL_XFER_BLK_COUNT:
@@ -423,7 +424,7 @@ static int renesas_sdhi_write16_hook(struct tmio_mmc_host *host, int addr)
 }
 
 static int renesas_sdhi_multi_io_quirk(struct mmc_card *card,
-					 unsigned int direction, int blk_size)
+				       unsigned int direction, int blk_size)
 {
 	/*
 	 * In Renesas controllers, when performing a
@@ -451,20 +452,23 @@ static void renesas_sdhi_enable_dma(struct tmio_mmc_host *host, bool enable)
 int renesas_sdhi_probe(struct platform_device *pdev,
 		       const struct tmio_mmc_dma_ops *dma_ops)
 {
-	const struct renesas_sdhi_of_data *of_data = of_device_get_match_data( &pdev->dev);
-	struct renesas_sdhi *priv;
-	struct tmio_mmc_data *mmc_data;
 	struct tmio_mmc_data *mmd = pdev->dev.platform_data;
+	const struct renesas_sdhi_of_data *of_data;
+	struct tmio_mmc_data *mmc_data;
+	struct tmio_mmc_dma *dma_priv;
 	struct tmio_mmc_host *host;
+	struct renesas_sdhi *priv;
 	struct resource *res;
 	int irq, ret, i;
-	struct tmio_mmc_dma *dma_priv;
+
+	of_data = of_device_get_match_data(&pdev->dev);
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	if (!res)
 		return -EINVAL;
 
-	priv = devm_kzalloc(&pdev->dev, sizeof(struct renesas_sdhi), GFP_KERNEL);
+	priv = devm_kzalloc(&pdev->dev, sizeof(struct renesas_sdhi),
+			    GFP_KERNEL);
 	if (!priv)
 		return -ENOMEM;
 
@@ -492,7 +496,6 @@ int renesas_sdhi_probe(struct platform_device *pdev,
 		goto eprobe;
 	}
 
-
 	if (of_data) {
 		mmc_data->flags |= of_data->tmio_flags;
 		mmc_data->ocr_mask = of_data->tmio_ocr_mask;
@@ -542,9 +545,7 @@ int renesas_sdhi_probe(struct platform_device *pdev,
 	 */
 	mmc_data->flags |= TMIO_MMC_SDIO_IRQ;
 
-	/*
-	 * All SDHI have CMD12 controll bit
-	 */
+	/* All SDHI have CMD12 control bit */
 	mmc_data->flags |= TMIO_MMC_HAVE_CMD12_CTRL;
 
 	/* All SDHI have SDIO status bits which must be 1 */
@@ -590,7 +591,7 @@ int renesas_sdhi_probe(struct platform_device *pdev,
 			break;
 		i++;
 		ret = devm_request_irq(&pdev->dev, irq, tmio_mmc_irq, 0,
-				  dev_name(&pdev->dev), host);
+				       dev_name(&pdev->dev), host);
 		if (ret)
 			goto eirq;
 	}
diff --git a/drivers/mmc/host/renesas_sdhi_sys_dmac.c b/drivers/mmc/host/renesas_sdhi_sys_dmac.c
index 82a37d1..d7757dd 100644
--- a/drivers/mmc/host/renesas_sdhi_sys_dmac.c
+++ b/drivers/mmc/host/renesas_sdhi_sys_dmac.c
@@ -92,7 +92,6 @@ static const struct of_device_id renesas_sdhi_sys_dmac_of_match[] = {
 };
 MODULE_DEVICE_TABLE(of, renesas_sdhi_sys_dmac_of_match);
 
-
 static void renesas_sdhi_sys_dmac_enable_dma(struct tmio_mmc_host *host,
 					     bool enable)
 {
@@ -184,8 +183,8 @@ static void renesas_sdhi_sys_dmac_start_dma_rx(struct tmio_mmc_host *host)
 
 	ret = dma_map_sg(chan->device->dev, sg, host->sg_len, DMA_FROM_DEVICE);
 	if (ret > 0)
-		desc = dmaengine_prep_slave_sg(chan, sg, ret,
-			DMA_DEV_TO_MEM, DMA_CTRL_ACK);
+		desc = dmaengine_prep_slave_sg(chan, sg, ret, DMA_DEV_TO_MEM,
+					       DMA_CTRL_ACK);
 
 	if (desc) {
 		reinit_completion(&host->dma_dataend);
@@ -253,6 +252,7 @@ static void renesas_sdhi_sys_dmac_start_dma_tx(struct tmio_mmc_host *host)
 	if (!aligned) {
 		unsigned long flags;
 		void *sg_vaddr = tmio_mmc_kmap_atomic(sg, &flags);
+
 		sg_init_one(&host->bounce_sg, host->bounce_buf, sg->length);
 		memcpy(host->bounce_buf, sg_vaddr, host->bounce_sg.length);
 		tmio_mmc_kunmap_atomic(sg, &flags, sg_vaddr);
@@ -262,8 +262,8 @@ static void renesas_sdhi_sys_dmac_start_dma_tx(struct tmio_mmc_host *host)
 
 	ret = dma_map_sg(chan->device->dev, sg, host->sg_len, DMA_TO_DEVICE);
 	if (ret > 0)
-		desc = dmaengine_prep_slave_sg(chan, sg, ret,
-			DMA_MEM_TO_DEV, DMA_CTRL_ACK);
+		desc = dmaengine_prep_slave_sg(chan, sg, ret, DMA_MEM_TO_DEV,
+					       DMA_CTRL_ACK);
 
 	if (desc) {
 		reinit_completion(&host->dma_dataend);
@@ -296,7 +296,7 @@ pio:
 }
 
 static void renesas_sdhi_sys_dmac_start_dma(struct tmio_mmc_host *host,
-			       struct mmc_data *data)
+					    struct mmc_data *data)
 {
 	if (data->flags & MMC_DATA_READ) {
 		if (host->chan_rx)
@@ -334,7 +334,7 @@ static void renesas_sdhi_sys_dmac_request_dma(struct tmio_mmc_host *host,
 {
 	/* We can only either use DMA for both Tx and Rx or not use it at all */
 	if (!host->dma || (!host->pdev->dev.of_node &&
-		(!pdata->chan_priv_tx || !pdata->chan_priv_rx)))
+			   (!pdata->chan_priv_tx || !pdata->chan_priv_rx)))
 		return;
 
 	if (!host->chan_tx && !host->chan_rx) {
@@ -360,7 +360,8 @@ static void renesas_sdhi_sys_dmac_request_dma(struct tmio_mmc_host *host,
 			return;
 
 		cfg.direction = DMA_MEM_TO_DEV;
-		cfg.dst_addr = res->start + (CTL_SD_DATA_PORT << host->bus_shift);
+		cfg.dst_addr = res->start +
+			(CTL_SD_DATA_PORT << host->bus_shift);
 		cfg.dst_addr_width = host->dma->dma_buswidth;
 		if (!cfg.dst_addr_width)
 			cfg.dst_addr_width = DMA_SLAVE_BUSWIDTH_2_BYTES;
@@ -416,11 +417,13 @@ static void renesas_sdhi_sys_dmac_release_dma(struct tmio_mmc_host *host)
 {
 	if (host->chan_tx) {
 		struct dma_chan *chan = host->chan_tx;
+
 		host->chan_tx = NULL;
 		dma_release_channel(chan);
 	}
 	if (host->chan_rx) {
 		struct dma_chan *chan = host->chan_rx;
+
 		host->chan_rx = NULL;
 		dma_release_channel(chan);
 	}
@@ -445,10 +448,10 @@ static int renesas_sdhi_sys_dmac_probe(struct platform_device *pdev)
 
 static const struct dev_pm_ops renesas_sdhi_sys_dmac_dev_pm_ops = {
 	SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
-			pm_runtime_force_resume)
+				pm_runtime_force_resume)
 	SET_RUNTIME_PM_OPS(tmio_mmc_host_runtime_suspend,
-			tmio_mmc_host_runtime_resume,
-			NULL)
+			   tmio_mmc_host_runtime_resume,
+			   NULL)
 };
 
 static struct platform_driver renesas_sys_dmac_sdhi_driver = {
-- 
2.7.4

[cip-dev] [PATCH 4.4.y-cip 71/83] mmc: tmio, renesas-sdhi: add max_{segs, blk_count} to tmio_mmc_data

[Biju Das]

From: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>

commit 603aa14d3daaa7073bab4c472025c4963030e0cc upstream.

Allow TMIO and SDHI driver implementations to provide values for
max_segs and max_blk_count.

A follow-up patch will set these values for Renesas Gen3 SoCs
the using an SDHI driver.

Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: Ai Kyuse <ai.kyuse.uw@renesas.com>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Biju Das <biju.das@bp.renesas.com>
---
 drivers/mmc/host/renesas_sdhi.h      | 2 ++
 drivers/mmc/host/renesas_sdhi_core.c | 2 ++
 drivers/mmc/host/tmio_mmc_core.c     | 6 +++---
 include/linux/mfd/tmio.h             | 2 ++
 4 files changed, 9 insertions(+), 3 deletions(-)

diff --git a/drivers/mmc/host/renesas_sdhi.h b/drivers/mmc/host/renesas_sdhi.h
index 781fe4c..6e33266 100644
--- a/drivers/mmc/host/renesas_sdhi.h
+++ b/drivers/mmc/host/renesas_sdhi.h
@@ -31,6 +31,8 @@ struct renesas_sdhi_of_data {
 	int scc_offset;
 	struct renesas_sdhi_scc *taps;
 	int taps_num;
+	unsigned int max_blk_count;
+	unsigned short max_segs;
 };
 
 int renesas_sdhi_probe(struct platform_device *pdev,
diff --git a/drivers/mmc/host/renesas_sdhi_core.c b/drivers/mmc/host/renesas_sdhi_core.c
index a64a3ba..2f8c7b8 100644
--- a/drivers/mmc/host/renesas_sdhi_core.c
+++ b/drivers/mmc/host/renesas_sdhi_core.c
@@ -502,6 +502,8 @@ int renesas_sdhi_probe(struct platform_device *pdev,
 		mmc_data->capabilities |= of_data->capabilities;
 		mmc_data->capabilities2 |= of_data->capabilities2;
 		mmc_data->dma_rx_offset = of_data->dma_rx_offset;
+		mmc_data->max_blk_count = of_data->max_blk_count;
+		mmc_data->max_segs = of_data->max_segs;
 		dma_priv->dma_buswidth = of_data->dma_buswidth;
 		host->bus_shift = of_data->bus_shift;
 	}
diff --git a/drivers/mmc/host/tmio_mmc_core.c b/drivers/mmc/host/tmio_mmc_core.c
index 8ab58ca..810d2d8 100644
--- a/drivers/mmc/host/tmio_mmc_core.c
+++ b/drivers/mmc/host/tmio_mmc_core.c
@@ -1224,10 +1224,10 @@ int tmio_mmc_host_probe(struct tmio_mmc_host *_host,
 
 	mmc->caps |= MMC_CAP_4_BIT_DATA | pdata->capabilities;
 	mmc->caps2 |= pdata->capabilities2;
-	mmc->max_segs = 32;
+	mmc->max_segs = pdata->max_segs ? : 32;
 	mmc->max_blk_size = 512;
-	mmc->max_blk_count = (PAGE_CACHE_SIZE / mmc->max_blk_size) *
-		mmc->max_segs;
+	mmc->max_blk_count = pdata->max_blk_count ? :
+		(PAGE_SIZE / mmc->max_blk_size) * mmc->max_segs;
 	mmc->max_req_size = mmc->max_blk_size * mmc->max_blk_count;
 	mmc->max_seg_size = mmc->max_req_size;
 
diff --git a/include/linux/mfd/tmio.h b/include/linux/mfd/tmio.h
index a1520d8..662fedc 100644
--- a/include/linux/mfd/tmio.h
+++ b/include/linux/mfd/tmio.h
@@ -128,6 +128,8 @@ struct tmio_mmc_data {
 	unsigned int			cd_gpio;
 	int				alignment_shift;
 	dma_addr_t			dma_rx_offset;
+	unsigned int			max_blk_count;
+	unsigned short			max_segs;
 	void (*set_pwr)(struct platform_device *host, int state);
 	void (*set_clk_div)(struct platform_device *host, int state);
 };
-- 
2.7.4

[cip-dev] [PATCH 4.4.y-cip 72/83] mmc: tmio, renesas-sdhi: add dataend to DMA ops

[Biju Das]

From: Simon Horman <horms+renesas@verge.net.au>

commit 92d0f925e6344a24b12a6eeb4f1030ec0e70e8d1 upstream.

Add dataend to DMA ops to allow DMAC implementation dependent
handling of DMA data end.

Also implement the operation for SDHI.

Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Biju Das <biju.das@bp.renesas.com>
---
 drivers/mmc/host/renesas_sdhi_sys_dmac.c |  6 ++++++
 drivers/mmc/host/tmio_mmc.h              |  1 +
 drivers/mmc/host/tmio_mmc_core.c         | 10 ++++++++--
 3 files changed, 15 insertions(+), 2 deletions(-)

diff --git a/drivers/mmc/host/renesas_sdhi_sys_dmac.c b/drivers/mmc/host/renesas_sdhi_sys_dmac.c
index d7757dd..86a81fd 100644
--- a/drivers/mmc/host/renesas_sdhi_sys_dmac.c
+++ b/drivers/mmc/host/renesas_sdhi_sys_dmac.c
@@ -114,6 +114,11 @@ static void renesas_sdhi_sys_dmac_abort_dma(struct tmio_mmc_host *host)
 	renesas_sdhi_sys_dmac_enable_dma(host, true);
 }
 
+static void renesas_sdhi_sys_dmac_dataend_dma(struct tmio_mmc_host *host)
+{
+	complete(&host->dma_dataend);
+}
+
 static void renesas_sdhi_sys_dmac_dma_callback(void *arg)
 {
 	struct tmio_mmc_host *host = arg;
@@ -439,6 +444,7 @@ static const struct tmio_mmc_dma_ops renesas_sdhi_sys_dmac_dma_ops = {
 	.request = renesas_sdhi_sys_dmac_request_dma,
 	.release = renesas_sdhi_sys_dmac_release_dma,
 	.abort = renesas_sdhi_sys_dmac_abort_dma,
+	.dataend = renesas_sdhi_sys_dmac_dataend_dma,
 };
 
 static int renesas_sdhi_sys_dmac_probe(struct platform_device *pdev)
diff --git a/drivers/mmc/host/tmio_mmc.h b/drivers/mmc/host/tmio_mmc.h
index cd5b4f3..17ea4b6 100644
--- a/drivers/mmc/host/tmio_mmc.h
+++ b/drivers/mmc/host/tmio_mmc.h
@@ -120,6 +120,7 @@ struct tmio_mmc_dma_ops {
 			struct tmio_mmc_data *pdata);
 	void (*release)(struct tmio_mmc_host *host);
 	void (*abort)(struct tmio_mmc_host *host);
+	void (*dataend)(struct tmio_mmc_host *host);
 };
 
 struct tmio_mmc_host {
diff --git a/drivers/mmc/host/tmio_mmc_core.c b/drivers/mmc/host/tmio_mmc_core.c
index 810d2d8..43209ea28 100644
--- a/drivers/mmc/host/tmio_mmc_core.c
+++ b/drivers/mmc/host/tmio_mmc_core.c
@@ -86,6 +86,12 @@ static inline void tmio_mmc_abort_dma(struct tmio_mmc_host *host)
 		host->dma_ops->abort(host);
 }
 
+static inline void tmio_mmc_dataend_dma(struct tmio_mmc_host *host)
+{
+	if (host->dma_ops)
+		host->dma_ops->dataend(host);
+}
+
 void tmio_mmc_enable_mmc_irqs(struct tmio_mmc_host *host, u32 i)
 {
 	host->sdcard_irq_mask &= ~(i & TMIO_MASK_IRQ);
@@ -637,11 +643,11 @@ static void tmio_mmc_data_irq(struct tmio_mmc_host *host, unsigned int stat)
 
 		if (done) {
 			tmio_mmc_disable_mmc_irqs(host, TMIO_STAT_DATAEND);
-			complete(&host->dma_dataend);
+			tmio_mmc_dataend_dma(host);
 		}
 	} else if (host->chan_rx && (data->flags & MMC_DATA_READ) && !host->force_pio) {
 		tmio_mmc_disable_mmc_irqs(host, TMIO_STAT_DATAEND);
-		complete(&host->dma_dataend);
+		tmio_mmc_dataend_dma(host);
 	} else {
 		tmio_mmc_do_data_irq(host);
 		tmio_mmc_disable_mmc_irqs(host, TMIO_MASK_READOP | TMIO_MASK_WRITEOP);
-- 
2.7.4

[cip-dev] [PATCH 4.4.y-cip 73/83] mmc: renesas-sdhi: add support for R-Car Gen3 SDHI DMAC

[Biju Das]

From: Simon Horman <horms+renesas@verge.net.au>

commit 2a68ea7896e3277d875c5d5e7f34cf2937cb55c3 upstream.

Add a new variant of the SDHI driver to support R-Car Gen3 with DMA via
on-chip bus mastering.  Since the DMAC is in a part of the SDHI module it
is not suitable to be used via DMA Engine.

Clearing of DM_CM_INFO1 after DMA thanks to Dirk Behme

Cc: Dirk Behme <dirk.behme@de.bosch.com>
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: Ai Kyuse <ai.kyuse.uw@renesas.com>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Biju Das <biju.das@bp.renesas.com>
---
 drivers/mmc/host/Kconfig                      |  19 ++
 drivers/mmc/host/Makefile                     |   8 +-
 drivers/mmc/host/renesas_sdhi_internal_dmac.c | 272 ++++++++++++++++++++++++++
 drivers/mmc/host/renesas_sdhi_sys_dmac.c      |   2 +-
 drivers/mmc/host/tmio_mmc.h                   |   1 +
 5 files changed, 300 insertions(+), 2 deletions(-)
 create mode 100644 drivers/mmc/host/renesas_sdhi_internal_dmac.c

diff --git a/drivers/mmc/host/Kconfig b/drivers/mmc/host/Kconfig
index eaf40ec..54d98ee 100644
--- a/drivers/mmc/host/Kconfig
+++ b/drivers/mmc/host/Kconfig
@@ -563,10 +563,29 @@ config MMC_SDHI
 	depends on SUPERH || ARM
 	depends on SUPERH || ARCH_SHMOBILE || COMPILE_TEST
 	select MMC_TMIO_CORE
+	select MMC_SDHI_SYS_DMAC if (SUPERH || ARM)
+	select MMC_SDHI_INTERNAL_DMAC if ARM64
 	help
 	  This provides support for the SDHI SD/SDIO controller found in
 	  Renesas SuperH, ARM and ARM64 based SoCs
 
+config MMC_SDHI_SYS_DMAC
+	tristate "DMA for SDHI SD/SDIO controllers using SYS-DMAC"
+	depends on MMC_SDHI
+	help
+	  This provides DMA support for SDHI SD/SDIO controllers
+	  using SYS-DMAC via DMA Engine. This supports the controllers
+	  found in SuperH and Renesas ARM based SoCs.
+
+config MMC_SDHI_INTERNAL_DMAC
+	tristate "DMA for SDHI SD/SDIO controllers using on-chip bus mastering"
+	depends on ARM64 || COMPILE_TEST
+	depends on MMC_SDHI
+	help
+	  This provides DMA support for SDHI SD/SDIO controllers
+	  using on-chip bus mastering. This supports the controllers
+	  found in arm64 based SoCs.
+
 config MMC_CB710
 	tristate "ENE CB710 MMC/SD Interface support"
 	depends on PCI
diff --git a/drivers/mmc/host/Makefile b/drivers/mmc/host/Makefile
index c3c85c9..f10bb0c 100644
--- a/drivers/mmc/host/Makefile
+++ b/drivers/mmc/host/Makefile
@@ -36,7 +36,13 @@ obj-$(CONFIG_MMC_S3C)   	+= s3cmci.o
 obj-$(CONFIG_MMC_SDRICOH_CS)	+= sdricoh_cs.o
 obj-$(CONFIG_MMC_TMIO)		+= tmio_mmc.o
 obj-$(CONFIG_MMC_TMIO_CORE)	+= tmio_mmc_core.o
-obj-$(CONFIG_MMC_SDHI)		+= renesas_sdhi_core.o renesas_sdhi_sys_dmac.o
+obj-$(CONFIG_MMC_SDHI)		+= renesas_sdhi_core.o
+ifeq ($(subst m,y,$(CONFIG_MMC_SDHI_SYS_DMAC)),y)
+obj-$(CONFIG_MMC_SDHI)		+= renesas_sdhi_sys_dmac.o
+endif
+ifeq ($(subst m,y,$(CONFIG_MMC_SDHI_INTERNAL_DMAC)),y)
+obj-$(CONFIG_MMC_SDHI)		+= renesas_sdhi_internal_dmac.o
+endif
 obj-$(CONFIG_MMC_CB710)		+= cb710-mmc.o
 obj-$(CONFIG_MMC_VIA_SDMMC)	+= via-sdmmc.o
 obj-$(CONFIG_SDH_BFIN)		+= bfin_sdh.o
diff --git a/drivers/mmc/host/renesas_sdhi_internal_dmac.c b/drivers/mmc/host/renesas_sdhi_internal_dmac.c
new file mode 100644
index 0000000..d41ff35
--- /dev/null
+++ b/drivers/mmc/host/renesas_sdhi_internal_dmac.c
@@ -0,0 +1,272 @@
+/*
+ * DMA support for Internal DMAC with SDHI SD/SDIO controller
+ *
+ * Copyright (C) 2016-17 Renesas Electronics Corporation
+ * Copyright (C) 2016-17 Horms Solutions, Simon Horman
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/device.h>
+#include <linux/dma-mapping.h>
+#include <linux/io-64-nonatomic-hi-lo.h>
+#include <linux/mfd/tmio.h>
+#include <linux/mmc/host.h>
+#include <linux/mod_devicetable.h>
+#include <linux/module.h>
+#include <linux/pagemap.h>
+#include <linux/scatterlist.h>
+
+#include "renesas_sdhi.h"
+#include "tmio_mmc.h"
+
+#define DM_CM_DTRAN_MODE	0x820
+#define DM_CM_DTRAN_CTRL	0x828
+#define DM_CM_RST		0x830
+#define DM_CM_INFO1		0x840
+#define DM_CM_INFO1_MASK	0x848
+#define DM_CM_INFO2		0x850
+#define DM_CM_INFO2_MASK	0x858
+#define DM_DTRAN_ADDR		0x880
+
+/* DM_CM_DTRAN_MODE */
+#define DTRAN_MODE_CH_NUM_CH0	0	/* "downstream" = for write commands */
+#define DTRAN_MODE_CH_NUM_CH1	BIT(16)	/* "uptream" = for read commands */
+#define DTRAN_MODE_BUS_WID_TH	(BIT(5) | BIT(4))
+#define DTRAN_MODE_ADDR_MODE	BIT(0)	/* 1 = Increment address */
+
+/* DM_CM_DTRAN_CTRL */
+#define DTRAN_CTRL_DM_START	BIT(0)
+
+/* DM_CM_RST */
+#define RST_DTRANRST1		BIT(9)
+#define RST_DTRANRST0		BIT(8)
+#define RST_RESERVED_BITS	GENMASK_ULL(32, 0)
+
+/* DM_CM_INFO1 and DM_CM_INFO1_MASK */
+#define INFO1_CLEAR		0
+#define INFO1_DTRANEND1		BIT(17)
+#define INFO1_DTRANEND0		BIT(16)
+
+/* DM_CM_INFO2 and DM_CM_INFO2_MASK */
+#define INFO2_DTRANERR1		BIT(17)
+#define INFO2_DTRANERR0		BIT(16)
+
+/*
+ * Specification of this driver:
+ * - host->chan_{rx,tx} will be used as a flag of enabling/disabling the dma
+ * - Since this SDHI DMAC register set has 16 but 32-bit width, we
+ *   need a custom accessor.
+ */
+
+/* Definitions for sampling clocks */
+static struct renesas_sdhi_scc rcar_gen3_scc_taps[] = {
+	{
+		.clk_rate = 0,
+		.tap = 0x00000300,
+	},
+};
+
+static const struct renesas_sdhi_of_data of_rcar_gen3_compatible = {
+	.tmio_flags	= TMIO_MMC_HAS_IDLE_WAIT | TMIO_MMC_WRPROTECT_DISABLE |
+			  TMIO_MMC_CLK_ACTUAL | TMIO_MMC_MIN_RCAR2,
+	.capabilities	= MMC_CAP_SD_HIGHSPEED | MMC_CAP_SDIO_IRQ |
+			  MMC_CAP_CMD23,
+	.bus_shift	= 2,
+	.scc_offset	= 0x1000,
+	.taps		= rcar_gen3_scc_taps,
+	.taps_num	= ARRAY_SIZE(rcar_gen3_scc_taps),
+	/* Gen3 SDHI DMAC can handle 0xffffffff blk count, but seg = 1 */
+	.max_blk_count	= 0xffffffff,
+	.max_segs	= 1,
+};
+
+static const struct of_device_id renesas_sdhi_internal_dmac_of_match[] = {
+	{},
+};
+MODULE_DEVICE_TABLE(of, renesas_sdhi_internal_dmac_of_match);
+
+static void
+renesas_sdhi_internal_dmac_dm_write(struct tmio_mmc_host *host,
+				    int addr, u64 val)
+{
+	writeq(val, host->ctl + addr);
+}
+
+static void
+renesas_sdhi_internal_dmac_enable_dma(struct tmio_mmc_host *host, bool enable)
+{
+	if (!host->chan_tx || !host->chan_rx)
+		return;
+
+	if (!enable)
+		renesas_sdhi_internal_dmac_dm_write(host, DM_CM_INFO1,
+						    INFO1_CLEAR);
+
+	if (host->dma->enable)
+		host->dma->enable(host, enable);
+}
+
+static void
+renesas_sdhi_internal_dmac_abort_dma(struct tmio_mmc_host *host) {
+	u64 val = RST_DTRANRST1 | RST_DTRANRST0;
+
+	renesas_sdhi_internal_dmac_enable_dma(host, false);
+
+	renesas_sdhi_internal_dmac_dm_write(host, DM_CM_RST,
+					    RST_RESERVED_BITS & ~val);
+	renesas_sdhi_internal_dmac_dm_write(host, DM_CM_RST,
+					    RST_RESERVED_BITS | val);
+
+	renesas_sdhi_internal_dmac_enable_dma(host, true);
+}
+
+static void
+renesas_sdhi_internal_dmac_dataend_dma(struct tmio_mmc_host *host) {
+	tasklet_schedule(&host->dma_complete);
+}
+
+static void
+renesas_sdhi_internal_dmac_start_dma(struct tmio_mmc_host *host,
+				     struct mmc_data *data)
+{
+	struct scatterlist *sg = host->sg_ptr;
+	u32 dtran_mode = DTRAN_MODE_BUS_WID_TH | DTRAN_MODE_ADDR_MODE;
+	enum dma_data_direction dir;
+	int ret;
+	u32 irq_mask;
+
+	/* This DMAC cannot handle if sg_len is not 1 */
+	WARN_ON(host->sg_len > 1);
+
+	/* This DMAC cannot handle if buffer is not 8-bytes alignment */
+	if (!IS_ALIGNED(sg->offset, 8))
+		goto force_pio;
+
+	if (data->flags & MMC_DATA_READ) {
+		dtran_mode |= DTRAN_MODE_CH_NUM_CH1;
+		dir = DMA_FROM_DEVICE;
+		irq_mask = TMIO_STAT_RXRDY;
+	} else {
+		dtran_mode |= DTRAN_MODE_CH_NUM_CH0;
+		dir = DMA_TO_DEVICE;
+		irq_mask = TMIO_STAT_TXRQ;
+	}
+
+	ret = dma_map_sg(&host->pdev->dev, sg, host->sg_len, dir);
+	if (ret == 0)
+		goto force_pio;
+
+	renesas_sdhi_internal_dmac_enable_dma(host, true);
+
+	/* disable PIO irqs to avoid "PIO IRQ in DMA mode!" */
+	tmio_mmc_disable_mmc_irqs(host, irq_mask);
+
+	/* set dma parameters */
+	renesas_sdhi_internal_dmac_dm_write(host, DM_CM_DTRAN_MODE,
+					    dtran_mode);
+	renesas_sdhi_internal_dmac_dm_write(host, DM_DTRAN_ADDR,
+					    sg->dma_address);
+
+	return;
+
+force_pio:
+	host->force_pio = true;
+	renesas_sdhi_internal_dmac_enable_dma(host, false);
+}
+
+static void renesas_sdhi_internal_dmac_issue_tasklet_fn(unsigned long arg)
+{
+	struct tmio_mmc_host *host = (struct tmio_mmc_host *)arg;
+
+	tmio_mmc_enable_mmc_irqs(host, TMIO_STAT_DATAEND);
+
+	/* start the DMAC */
+	renesas_sdhi_internal_dmac_dm_write(host, DM_CM_DTRAN_CTRL,
+					    DTRAN_CTRL_DM_START);
+}
+
+static void renesas_sdhi_internal_dmac_complete_tasklet_fn(unsigned long arg)
+{
+	struct tmio_mmc_host *host = (struct tmio_mmc_host *)arg;
+	enum dma_data_direction dir;
+
+	spin_lock_irq(&host->lock);
+
+	if (!host->data)
+		goto out;
+
+	if (host->data->flags & MMC_DATA_READ)
+		dir = DMA_FROM_DEVICE;
+	else
+		dir = DMA_TO_DEVICE;
+
+	renesas_sdhi_internal_dmac_enable_dma(host, false);
+	dma_unmap_sg(&host->pdev->dev, host->sg_ptr, host->sg_len, dir);
+
+	tmio_mmc_do_data_irq(host);
+out:
+	spin_unlock_irq(&host->lock);
+}
+
+static void
+renesas_sdhi_internal_dmac_request_dma(struct tmio_mmc_host *host,
+				       struct tmio_mmc_data *pdata)
+{
+	/* Each value is set to non-zero to assume "enabling" each DMA */
+	host->chan_rx = host->chan_tx = (void *)0xdeadbeaf;
+
+	tasklet_init(&host->dma_complete,
+		     renesas_sdhi_internal_dmac_complete_tasklet_fn,
+		     (unsigned long)host);
+	tasklet_init(&host->dma_issue,
+		     renesas_sdhi_internal_dmac_issue_tasklet_fn,
+		     (unsigned long)host);
+}
+
+static void
+renesas_sdhi_internal_dmac_release_dma(struct tmio_mmc_host *host)
+{
+	/* Each value is set to zero to assume "disabling" each DMA */
+	host->chan_rx = host->chan_tx = NULL;
+}
+
+static const struct tmio_mmc_dma_ops renesas_sdhi_internal_dmac_dma_ops = {
+	.start = renesas_sdhi_internal_dmac_start_dma,
+	.enable = renesas_sdhi_internal_dmac_enable_dma,
+	.request = renesas_sdhi_internal_dmac_request_dma,
+	.release = renesas_sdhi_internal_dmac_release_dma,
+	.abort = renesas_sdhi_internal_dmac_abort_dma,
+	.dataend = renesas_sdhi_internal_dmac_dataend_dma,
+};
+
+static int renesas_sdhi_internal_dmac_probe(struct platform_device *pdev)
+{
+	return renesas_sdhi_probe(pdev, &renesas_sdhi_internal_dmac_dma_ops);
+}
+
+static const struct dev_pm_ops renesas_sdhi_internal_dmac_dev_pm_ops = {
+	SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
+				pm_runtime_force_resume)
+	SET_RUNTIME_PM_OPS(tmio_mmc_host_runtime_suspend,
+			   tmio_mmc_host_runtime_resume,
+			   NULL)
+};
+
+static struct platform_driver renesas_internal_dmac_sdhi_driver = {
+	.driver		= {
+		.name	= "renesas_sdhi_internal_dmac",
+		.pm	= &renesas_sdhi_internal_dmac_dev_pm_ops,
+		.of_match_table = renesas_sdhi_internal_dmac_of_match,
+	},
+	.probe		= renesas_sdhi_internal_dmac_probe,
+	.remove		= renesas_sdhi_remove,
+};
+
+module_platform_driver(renesas_internal_dmac_sdhi_driver);
+
+MODULE_DESCRIPTION("Renesas SDHI driver for internal DMAC");
+MODULE_AUTHOR("Yoshihiro Shimoda");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/mmc/host/renesas_sdhi_sys_dmac.c b/drivers/mmc/host/renesas_sdhi_sys_dmac.c
index 86a81fd..84bb945 100644
--- a/drivers/mmc/host/renesas_sdhi_sys_dmac.c
+++ b/drivers/mmc/host/renesas_sdhi_sys_dmac.c
@@ -1,5 +1,5 @@
 /*
- * DMA function for TMIO MMC implementations
+ * DMA support use of SYS DMAC with SDHI SD/SDIO controller
  *
  * Copyright (C) 2010-2011 Guennadi Liakhovetski
  *
diff --git a/drivers/mmc/host/tmio_mmc.h b/drivers/mmc/host/tmio_mmc.h
index 17ea4b6..16a3064 100644
--- a/drivers/mmc/host/tmio_mmc.h
+++ b/drivers/mmc/host/tmio_mmc.h
@@ -150,6 +150,7 @@ struct tmio_mmc_host {
 	struct dma_chan		*chan_rx;
 	struct dma_chan		*chan_tx;
 	struct completion	dma_dataend;
+	struct tasklet_struct	dma_complete;
 	struct tasklet_struct	dma_issue;
 	struct scatterlist	bounce_sg;
 	u8			*bounce_buf;
-- 
2.7.4

[cip-dev] [PATCH 4.4.y-cip 74/83] mmc: tmio-mmc: fix bad pointer math

[Biju Das]

From: Chris Brandt <chris.brandt@renesas.com>

commit b5dd7985e8d3357ff9537c0be231190ab1a131fe upstream.

commit 9c284c41c0886f09e75c323a16278b6d353b0b4a upstream.

The existing code gives an incorrect pointer value.
The buffer pointer 'buf' was of type unsigned short *, and 'count' was a
number in bytes. A cast of buf should have been used.

However, instead of casting, just change the code to use u32 pointers.

Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Fixes: 8185e51f358a: ("mmc: tmio-mmc: add support for 32bit data port")
Signed-off-by: Chris Brandt <chris.brandt@renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Acked-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Biju Das <biju.das@bp.renesas.com>
---
 drivers/mmc/host/tmio_mmc_core.c | 19 +++++++++----------
 1 file changed, 9 insertions(+), 10 deletions(-)

diff --git a/drivers/mmc/host/tmio_mmc_core.c b/drivers/mmc/host/tmio_mmc_core.c
index 43209ea28..b6500a6 100644
--- a/drivers/mmc/host/tmio_mmc_core.c
+++ b/drivers/mmc/host/tmio_mmc_core.c
@@ -446,30 +446,29 @@ static void tmio_mmc_transfer_data(struct tmio_mmc_host *host,
 	 * Transfer the data
 	 */
 	if (host->pdata->flags & TMIO_MMC_32BIT_DATA_PORT) {
-		u8 data[4] = { };
+		u32 data = 0;
+		u32 *buf32 = (u32 *)buf;
 
 		if (is_read)
-			sd_ctrl_read32_rep(host, CTL_SD_DATA_PORT, (u32 *)buf,
+			sd_ctrl_read32_rep(host, CTL_SD_DATA_PORT, buf32,
 					   count >> 2);
 		else
-			sd_ctrl_write32_rep(host, CTL_SD_DATA_PORT, (u32 *)buf,
+			sd_ctrl_write32_rep(host, CTL_SD_DATA_PORT, buf32,
 					    count >> 2);
 
 		/* if count was multiple of 4 */
 		if (!(count & 0x3))
 			return;
 
-		buf8 = (u8 *)(buf + (count >> 2));
+		buf32 += count >> 2;
 		count %= 4;
 
 		if (is_read) {
-			sd_ctrl_read32_rep(host, CTL_SD_DATA_PORT,
-					   (u32 *)data, 1);
-			memcpy(buf8, data, count);
+			sd_ctrl_read32_rep(host, CTL_SD_DATA_PORT, &data, 1);
+			memcpy(buf32, &data, count);
 		} else {
-			memcpy(data, buf8, count);
-			sd_ctrl_write32_rep(host, CTL_SD_DATA_PORT,
-					    (u32 *)data, 1);
+			memcpy(&data, buf32, count);
+			sd_ctrl_write32_rep(host, CTL_SD_DATA_PORT, &data, 1);
 		}
 
 		return;
-- 
2.7.4

[cip-dev] [PATCH 4.4.y-cip 75/83] mmc: renesas_sdhi: consolidate DMAC CONFIG options

[Biju Das]

From: Masahiro Yamada <yamada.masahiro@socionext.com>

commit c813e10a6bbad9ef56bc115c64d48c5a7d0a7dd5 upstream.

The description in the Makefile is odd.  Fix the CONFIG selection
in a cleaner way.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Acked-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Biju Das <biju.das@bp.renesas.com>
---
 drivers/mmc/host/Kconfig  | 4 ++--
 drivers/mmc/host/Makefile | 8 ++------
 2 files changed, 4 insertions(+), 8 deletions(-)

diff --git a/drivers/mmc/host/Kconfig b/drivers/mmc/host/Kconfig
index 54d98ee..7b947ce 100644
--- a/drivers/mmc/host/Kconfig
+++ b/drivers/mmc/host/Kconfig
@@ -563,8 +563,6 @@ config MMC_SDHI
 	depends on SUPERH || ARM
 	depends on SUPERH || ARCH_SHMOBILE || COMPILE_TEST
 	select MMC_TMIO_CORE
-	select MMC_SDHI_SYS_DMAC if (SUPERH || ARM)
-	select MMC_SDHI_INTERNAL_DMAC if ARM64
 	help
 	  This provides support for the SDHI SD/SDIO controller found in
 	  Renesas SuperH, ARM and ARM64 based SoCs
@@ -572,6 +570,7 @@ config MMC_SDHI
 config MMC_SDHI_SYS_DMAC
 	tristate "DMA for SDHI SD/SDIO controllers using SYS-DMAC"
 	depends on MMC_SDHI
+	default MMC_SDHI if (SUPERH || ARM)
 	help
 	  This provides DMA support for SDHI SD/SDIO controllers
 	  using SYS-DMAC via DMA Engine. This supports the controllers
@@ -581,6 +580,7 @@ config MMC_SDHI_INTERNAL_DMAC
 	tristate "DMA for SDHI SD/SDIO controllers using on-chip bus mastering"
 	depends on ARM64 || COMPILE_TEST
 	depends on MMC_SDHI
+	default MMC_SDHI if ARM64
 	help
 	  This provides DMA support for SDHI SD/SDIO controllers
 	  using on-chip bus mastering. This supports the controllers
diff --git a/drivers/mmc/host/Makefile b/drivers/mmc/host/Makefile
index f10bb0c..5de0c72 100644
--- a/drivers/mmc/host/Makefile
+++ b/drivers/mmc/host/Makefile
@@ -37,12 +37,8 @@ obj-$(CONFIG_MMC_SDRICOH_CS)	+= sdricoh_cs.o
 obj-$(CONFIG_MMC_TMIO)		+= tmio_mmc.o
 obj-$(CONFIG_MMC_TMIO_CORE)	+= tmio_mmc_core.o
 obj-$(CONFIG_MMC_SDHI)		+= renesas_sdhi_core.o
-ifeq ($(subst m,y,$(CONFIG_MMC_SDHI_SYS_DMAC)),y)
-obj-$(CONFIG_MMC_SDHI)		+= renesas_sdhi_sys_dmac.o
-endif
-ifeq ($(subst m,y,$(CONFIG_MMC_SDHI_INTERNAL_DMAC)),y)
-obj-$(CONFIG_MMC_SDHI)		+= renesas_sdhi_internal_dmac.o
-endif
+obj-$(CONFIG_MMC_SDHI_SYS_DMAC)		+= renesas_sdhi_sys_dmac.o
+obj-$(CONFIG_MMC_SDHI_INTERNAL_DMAC)	+= renesas_sdhi_internal_dmac.o
 obj-$(CONFIG_MMC_CB710)		+= cb710-mmc.o
 obj-$(CONFIG_MMC_VIA_SDMMC)	+= via-sdmmc.o
 obj-$(CONFIG_SDH_BFIN)		+= bfin_sdh.o
-- 
2.7.4

[cip-dev] [PATCH 4.4.y-cip 76/83] dt-bindings: mmc: renesas_sdhi: add R-Car Gen[123] fallback compatibility strings

[Biju Das]

From: Simon Horman <horms+renesas@verge.net.au>

commit 54839d012d5f98cde2fa102fdcd22e1da661d138 upstream.

Add fallback compatibility strings for R-Car Gen 1, 2 and 3.

In the case of Renesas R-Car hardware we know that there are generations of
SoCs, f.e. Gen 1 and 2. But beyond that its not clear what the relationship
between IP blocks might be. For example, I believe that r8a7790 is older
than r8a7791 but that doesn't imply that the latter is a descendant of the
former or vice versa.

We can, however, by examining the documentation and behaviour of the
hardware at run-time observe that the current driver implementation appears
to be compatible with the IP blocks on SoCs within a given generation.

For the above reasons and convenience when enabling new SoCs a
per-generation fallback compatibility string scheme is being adopted for
drivers for Renesas SoCs.

Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Acked-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Biju Das <biju.das@bp.renesas.com>
---
 Documentation/devicetree/bindings/mmc/tmio_mmc.txt | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/Documentation/devicetree/bindings/mmc/tmio_mmc.txt b/Documentation/devicetree/bindings/mmc/tmio_mmc.txt
index 1d23a43..25f06e6 100644
--- a/Documentation/devicetree/bindings/mmc/tmio_mmc.txt
+++ b/Documentation/devicetree/bindings/mmc/tmio_mmc.txt
@@ -24,6 +24,13 @@ Required properties:
 		"renesas,sdhi-r8a7792" - SDHI IP on R8A7792 SoC
 		"renesas,sdhi-r8a7793" - SDHI IP on R8A7793 SoC
 		"renesas,sdhi-r8a7794" - SDHI IP on R8A7794 SoC
+		"renesas,rcar-gen1-sdhi" - a generic R-Car Gen1 SDHI controller
+		"renesas,rcar-gen2-sdhi" - a generic R-Car Gen2 or RZ/G1
+					   SDHI controller
+
+		When compatible with the generic version, nodes must list
+		the SoC-specific version corresponding to the platform
+		first followed by the generic version.
 
 Optional properties:
 - toshiba,mmc-wrprotect-disable: write-protect detection is unavailable
-- 
2.7.4

[cip-dev] [PATCH 4.4.y-cip 77/83] mmc: renesas_sdhi: implement R-Car Gen[123] fallback compatibility strings

[Biju Das]

From: Simon Horman <horms+renesas@verge.net.au>

commit d6dc425ae595e14026beac3720e43edd70215dc8 upstream.

Implement fallback compatibility strings for R-Car Gen 1, 2 and 3.

In the case of Renesas R-Car hardware we know that there are generations of
SoCs, f.e. Gen 1 and 2. But beyond that its not clear what the relationship
between IP blocks might be. For example, I believe that r8a7790 is older
than r8a7791 but that doesn't imply that the latter is a descendant of the
former or vice versa.

We can, however, by examining the documentation and behaviour of the
hardware at run-time observe that the current driver implementation appears
to be compatible with the IP blocks on SoCs within a given generation.

For the above reasons and convenience when enabling new SoCs a
per-generation fallback compatibility string scheme is being adopted for
drivers for Renesas SoCs.

Also, improve readability by listing the shmobile fallback compatibility
string after the more-specific compatibility strings they provide a
fallback for.

Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Acked-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Biju Das <biju.das@bp.renesas.com>
[ Removed R-Car Gen3  devices ]
---
 drivers/mmc/host/renesas_sdhi_sys_dmac.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/mmc/host/renesas_sdhi_sys_dmac.c b/drivers/mmc/host/renesas_sdhi_sys_dmac.c
index 84bb945..77f3af4 100644
--- a/drivers/mmc/host/renesas_sdhi_sys_dmac.c
+++ b/drivers/mmc/host/renesas_sdhi_sys_dmac.c
@@ -75,7 +75,6 @@ static const struct renesas_sdhi_of_data of_rcar_gen3_compatible = {
 };
 
 static const struct of_device_id renesas_sdhi_sys_dmac_of_match[] = {
-	{ .compatible = "renesas,sdhi-shmobile" },
 	{ .compatible = "renesas,sdhi-sh73a0", .data = &of_default_cfg, },
 	{ .compatible = "renesas,sdhi-r8a73a4", .data = &of_default_cfg, },
 	{ .compatible = "renesas,sdhi-r8a7740", .data = &of_default_cfg, },
@@ -88,6 +87,9 @@ static const struct of_device_id renesas_sdhi_sys_dmac_of_match[] = {
 	{ .compatible = "renesas,sdhi-r8a7792", .data = &of_rcar_gen2_compatible, },
 	{ .compatible = "renesas,sdhi-r8a7793", .data = &of_rcar_gen2_compatible, },
 	{ .compatible = "renesas,sdhi-r8a7794", .data = &of_rcar_gen2_compatible, },
+	{ .compatible = "renesas,rcar-gen1-sdhi", .data = &of_rcar_gen1_compatible, },
+	{ .compatible = "renesas,rcar-gen2-sdhi", .data = &of_rcar_gen2_compatible, },
+	{ .compatible = "renesas,sdhi-shmobile" },
 	{},
 };
 MODULE_DEVICE_TABLE(of, renesas_sdhi_sys_dmac_of_match);
-- 
2.7.4

[cip-dev] [PATCH 4.4.y-cip 78/83] dt-bindings: mmc: renesas_sdhi: Add r8a77470 support

[Biju Das]

From: Fabrizio Castro <fabrizio.castro@bp.renesas.com>

commit be6f8db406a49511a8d213f9443ae79fe5b086c3 upstream.

The RZ/G1C (a.k.a. R8A77470) comes with three SDHI interfaces,
SDHI0 and SDHI2 are compatible with R-Car Gen2 SDHIs, and
SDHI1 is compatible with R-Car Gen3 SDHIs, as it comes with an
internal DMAC, therefore SDHI1 is fully compatible with driver
renesas_sdhi_internal_dmac driver. As a result, the compatible
strings for the R8A77470 SDHI interfaces are a little bit special.
Document SDHI support for the RZ/G1C SoC.

Signed-off-by: Fabrizio Castro <fabrizio.castro@bp.renesas.com>
Reviewed-by: Biju Das <biju.das@bp.renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Simon Horman <horms+renesas@verge.net.au>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Biju Das <biju.das@bp.renesas.com>
[ Removed R-Car Gen3 devices ]
---
 Documentation/devicetree/bindings/mmc/tmio_mmc.txt | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/Documentation/devicetree/bindings/mmc/tmio_mmc.txt b/Documentation/devicetree/bindings/mmc/tmio_mmc.txt
index 25f06e6..cbce1e6 100644
--- a/Documentation/devicetree/bindings/mmc/tmio_mmc.txt
+++ b/Documentation/devicetree/bindings/mmc/tmio_mmc.txt
@@ -17,6 +17,8 @@ Required properties:
 		"renesas,sdhi-r8a7740" - SDHI IP on R8A7740 SoC
 		"renesas,sdhi-r8a7743" - SDHI IP on R8A7743 SoC
 		"renesas,sdhi-r8a7745" - SDHI IP on R8A7745 SoC
+		"renesas,sdhi-r8a77470" - SDHI IP on R8A77470 SoC
+		"renesas,sdhi-mmc-r8a77470" - SDHI/MMC IP on R8A77470 SoC
 		"renesas,sdhi-r8a7778" - SDHI IP on R8A7778 SoC
 		"renesas,sdhi-r8a7779" - SDHI IP on R8A7779 SoC
 		"renesas,sdhi-r8a7790" - SDHI IP on R8A7790 SoC
@@ -25,8 +27,8 @@ Required properties:
 		"renesas,sdhi-r8a7793" - SDHI IP on R8A7793 SoC
 		"renesas,sdhi-r8a7794" - SDHI IP on R8A7794 SoC
 		"renesas,rcar-gen1-sdhi" - a generic R-Car Gen1 SDHI controller
-		"renesas,rcar-gen2-sdhi" - a generic R-Car Gen2 or RZ/G1
-					   SDHI controller
+		"renesas,rcar-gen2-sdhi" - a generic R-Car Gen2 and RZ/G1 SDHI
+					   (not SDHI/MMC) controller
 
 		When compatible with the generic version, nodes must list
 		the SoC-specific version corresponding to the platform
-- 
2.7.4

[cip-dev] [PATCH 4.4.y-cip 79/83] mmc: renesas_sdhi: Add r8a77470 SDHI1 support

[Biju Das]

From: Fabrizio Castro <fabrizio.castro@bp.renesas.com>

commit 60ab43ba6b6e0f888aab3ce0f84a8aaf15d15079 upstream.

The RZ/G1C (a.k.a. R8A77470) comes with three SDHI interfaces,
SDHI0 and SDHI2 are compatible with the R-Car Gen2 SDHIs, SDHI1
is compatible with R-Car Gen3 SDHIs and it can be used as
eMMC as well. This patch adds driver compatibility, and makes
sure both drivers get compiled for the R8A77470.

Signed-off-by: Fabrizio Castro <fabrizio.castro@bp.renesas.com>
Reviewed-by: Biju Das <biju.das@bp.renesas.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Biju Das <biju.das@bp.renesas.com>
[ Removed reset and updated clk and power domain properties ]
---
 drivers/mmc/host/Kconfig                      | 4 ++--
 drivers/mmc/host/renesas_sdhi_internal_dmac.c | 1 +
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/mmc/host/Kconfig b/drivers/mmc/host/Kconfig
index 7b947ce..359ec493 100644
--- a/drivers/mmc/host/Kconfig
+++ b/drivers/mmc/host/Kconfig
@@ -578,9 +578,9 @@ config MMC_SDHI_SYS_DMAC
 
 config MMC_SDHI_INTERNAL_DMAC
 	tristate "DMA for SDHI SD/SDIO controllers using on-chip bus mastering"
-	depends on ARM64 || COMPILE_TEST
+	depends on ARM64 || ARCH_R8A77470 || COMPILE_TEST
 	depends on MMC_SDHI
-	default MMC_SDHI if ARM64
+	default MMC_SDHI if (ARM64 || ARCH_R8A77470)
 	help
 	  This provides DMA support for SDHI SD/SDIO controllers
 	  using on-chip bus mastering. This supports the controllers
diff --git a/drivers/mmc/host/renesas_sdhi_internal_dmac.c b/drivers/mmc/host/renesas_sdhi_internal_dmac.c
index d41ff35..8056325 100644
--- a/drivers/mmc/host/renesas_sdhi_internal_dmac.c
+++ b/drivers/mmc/host/renesas_sdhi_internal_dmac.c
@@ -84,6 +84,7 @@ static const struct renesas_sdhi_of_data of_rcar_gen3_compatible = {
 };
 
 static const struct of_device_id renesas_sdhi_internal_dmac_of_match[] = {
+	{ .compatible = "renesas,sdhi-mmc-r8a77470", .data = &of_rcar_gen3_compatible, },
 	{},
 };
 MODULE_DEVICE_TABLE(of, renesas_sdhi_internal_dmac_of_match);
-- 
2.7.4

[cip-dev] [PATCH 4.4.y-cip 80/83] ARM: dts: r8a77470: Add SDHI2 support

[Biju Das]

From: Fabrizio Castro <fabrizio.castro@bp.renesas.com>

commit f068cc816015f8a6af494b584978aa7df96d80fe upstream.

Add SoC specific device tree definitions for the SDHI2 interface.

Signed-off-by: Fabrizio Castro <fabrizio.castro@bp.renesas.com>
Reviewed-by: Biju Das <biju.das@bp.renesas.com>
Acked-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
Signed-off-by: Biju Das <biju.das@bp.renesas.com>
[ Removed reset and updated clk and power domain properties ]
---
 arch/arm/boot/dts/r8a77470.dtsi | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/arch/arm/boot/dts/r8a77470.dtsi b/arch/arm/boot/dts/r8a77470.dtsi
index 568f650..fd9d92c 100644
--- a/arch/arm/boot/dts/r8a77470.dtsi
+++ b/arch/arm/boot/dts/r8a77470.dtsi
@@ -655,6 +655,20 @@
 			status = "disabled";
 		};
 
+		sdhi2: sd at ee160000 {
+			compatible = "renesas,sdhi-r8a77470",
+				     "renesas,rcar-gen2-sdhi";
+			reg = <0 0xee160000 0 0x328>;
+			interrupts = <GIC_SPI 167 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&mstp3_clks R8A77470_CLK_SDHI2>;
+			dmas = <&dmac0 0xd3>, <&dmac0 0xd4>,
+			       <&dmac1 0xd3>, <&dmac1 0xd4>;
+			dma-names = "tx", "rx", "tx", "rx";
+			max-frequency = <97500000>;
+			power-domains = <&cpg_clocks>;
+			status = "disabled";
+		};
+
 		gic: interrupt-controller at f1001000 {
 			compatible = "arm,gic-400";
 			#interrupt-cells = <3>;
-- 
2.7.4

[cip-dev] [PATCH 4.4.y-cip 81/83] ARM: dts: r8a77470: Add SDHI0 support

[Biju Das]

From: Fabrizio Castro <fabrizio.castro@bp.renesas.com>

commit 15aa5a95e820e8183aa34535131e7c97789b8504 upstream.

RZ/G1C comes with two different types of IP for the SDHI
interfaces, SDHI0 and SDHI2 share the same IP type, and
such an IP is also compatible with the one found in R-Car
Gen2. SDHI1 IP on the other hand is compatible with R-Car
Gen3 with internal DMA.
This patch completes the SDHI support of the R-Car Gen2
compatible IPs, including fixing the max-frequency
definition of SDHI2, as it turns out there is a bug in
Section 1.3.9 of the RZ/G1C Hardware User's Manual (Rev.
1.00 Oct. 2017).

Signed-off-by: Fabrizio Castro <fabrizio.castro@bp.renesas.com>
Reviewed-by: Biju Das <biju.das@bp.renesas.com>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
Signed-off-by: Biju Das <biju.das@bp.renesas.com>
[ Removed reset and updated clk and power domain properties ]
---
 arch/arm/boot/dts/r8a77470.dtsi | 16 +++++++++++++++-
 1 file changed, 15 insertions(+), 1 deletion(-)

diff --git a/arch/arm/boot/dts/r8a77470.dtsi b/arch/arm/boot/dts/r8a77470.dtsi
index fd9d92c..f8fccd4 100644
--- a/arch/arm/boot/dts/r8a77470.dtsi
+++ b/arch/arm/boot/dts/r8a77470.dtsi
@@ -655,6 +655,20 @@
 			status = "disabled";
 		};
 
+		sdhi0: sd at ee100000 {
+			compatible = "renesas,sdhi-r8a77470",
+				     "renesas,rcar-gen2-sdhi";
+			reg = <0 0xee100000 0 0x328>;
+			interrupts = <GIC_SPI 165 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&mstp3_clks R8A77470_CLK_SDHI0>;
+			dmas = <&dmac0 0xcd>, <&dmac0 0xce>,
+			       <&dmac1 0xcd>, <&dmac1 0xce>;
+			dma-names = "tx", "rx", "tx", "rx";
+			max-frequency = <156000000>;
+			power-domains = <&cpg_clocks>;
+			status = "disabled";
+		};
+
 		sdhi2: sd at ee160000 {
 			compatible = "renesas,sdhi-r8a77470",
 				     "renesas,rcar-gen2-sdhi";
@@ -664,7 +678,7 @@
 			dmas = <&dmac0 0xd3>, <&dmac0 0xd4>,
 			       <&dmac1 0xd3>, <&dmac1 0xd4>;
 			dma-names = "tx", "rx", "tx", "rx";
-			max-frequency = <97500000>;
+			max-frequency = <78000000>;
 			power-domains = <&cpg_clocks>;
 			status = "disabled";
 		};
-- 
2.7.4

[cip-dev] [PATCH 4.4.y-cip 82/83] ARM: dts: r8a77470: Add SDHI1 support

[Biju Das]

From: Fabrizio Castro <fabrizio.castro@bp.renesas.com>

commit 0485da788028ecd525291974c8efe2d072607476 upstream.

Althought interface SDHI1 found on the RZ/G1C SoC (a.k.a.
r8a77470) is compatible with the R-Car Gen3 ones, its OF
compatibility is restricted to the SoC specific compatible
string to avoid confusion, as from a more generic perspective
the RZ/G1C is sharing the most similarities with the R-Car
Gen2 family of SoCs, and there is a combination of R-Car
Gen2 compatible SDHI IPs and R-Car Gen3 compatible SDHI IP
on this specific chip.
This patch adds the SoC specific part of SDHI1 support, and
since SDHI1 comes with internal DMA, its DT node looks fairly
different from SDHI0 and SDHI2.

Signed-off-by: Fabrizio Castro <fabrizio.castro@bp.renesas.com>
Reviewed-by: Biju Das <biju.das@bp.renesas.com>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
Signed-off-by: Biju Das <biju.das@bp.renesas.com>
[ Removed reset and updated clk and power domain properties ]
---
 arch/arm/boot/dts/r8a77470.dtsi | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/arch/arm/boot/dts/r8a77470.dtsi b/arch/arm/boot/dts/r8a77470.dtsi
index f8fccd4..757c935 100644
--- a/arch/arm/boot/dts/r8a77470.dtsi
+++ b/arch/arm/boot/dts/r8a77470.dtsi
@@ -669,6 +669,16 @@
 			status = "disabled";
 		};
 
+		sdhi1: sd at ee300000 {
+			compatible = "renesas,sdhi-mmc-r8a77470";
+			reg = <0 0xee300000 0 0x2000>;
+			interrupts = <GIC_SPI 166 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&mstp3_clks R8A77470_CLK_SDHI1>;
+			max-frequency = <156000000>;
+			power-domains = <&cpg_clocks>;
+			status = "disabled";
+		};
+
 		sdhi2: sd at ee160000 {
 			compatible = "renesas,sdhi-r8a77470",
 				     "renesas,rcar-gen2-sdhi";
-- 
2.7.4

[cip-dev] [PATCH 4.4.y-cip 83/83] ARM: dts: iwg23s-sbc: Add uSD and eMMC support

[Biju Das]

From: Fabrizio Castro <fabrizio.castro@bp.renesas.com>

commit 9eb36b945b5c21d57c02a26cc629dd9484ced9aa upstream.

Add uSD card and eMMC support to the iwg23s single board
computer powered by the RZ/G1C SoC (a.k.a. r8a77470).

Signed-off-by: Fabrizio Castro <fabrizio.castro@bp.renesas.com>
Reviewed-by: Biju Das <biju.das@bp.renesas.com>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
Signed-off-by: Biju Das <biju.das@bp.renesas.com>
---
 arch/arm/boot/dts/r8a77470-iwg23s-sbc.dts | 75 +++++++++++++++++++++++++++++++
 1 file changed, 75 insertions(+)

diff --git a/arch/arm/boot/dts/r8a77470-iwg23s-sbc.dts b/arch/arm/boot/dts/r8a77470-iwg23s-sbc.dts
index 273acc8..579414e 100644
--- a/arch/arm/boot/dts/r8a77470-iwg23s-sbc.dts
+++ b/arch/arm/boot/dts/r8a77470-iwg23s-sbc.dts
@@ -6,6 +6,7 @@
  */
 
 /dts-v1/;
+#include <dt-bindings/gpio/gpio.h>
 #include "r8a77470.dtsi"
 / {
 	model = "iWave iW-RainboW-G23S single board computer based on RZ/G1C";
@@ -25,6 +26,37 @@
 		device_type = "memory";
 		reg = <0 0x40000000 0 0x20000000>;
 	};
+
+	reg_1p8v: reg-1p8v {
+		compatible = "regulator-fixed";
+		regulator-name = "fixed-1.8V";
+		regulator-min-microvolt = <1800000>;
+		regulator-max-microvolt = <1800000>;
+		regulator-boot-on;
+		regulator-always-on;
+	};
+
+	reg_3p3v: reg-3p3v {
+		compatible = "regulator-fixed";
+		regulator-name = "fixed-3.3V";
+		regulator-min-microvolt = <3300000>;
+		regulator-max-microvolt = <3300000>;
+		regulator-boot-on;
+		regulator-always-on;
+	};
+
+	vccq_sdhi2: regulator-vccq-sdhi2 {
+		compatible = "regulator-gpio";
+
+		regulator-name = "SDHI2 VccQ";
+		regulator-min-microvolt = <1800000>;
+		regulator-max-microvolt = <3300000>;
+
+		gpios = <&gpio2 24 GPIO_ACTIVE_HIGH>;
+		gpios-states = <1>;
+		states = <3300000 1
+			  1800000 0>;
+	};
 };
 
 &avb {
@@ -84,6 +116,12 @@
 		function = "i2c3";
 	};
 
+	mmc_pins_uhs: mmc_uhs {
+		groups = "mmc_data8", "mmc_ctrl";
+		function = "mmc";
+		power-source = <1800>;
+	};
+
 	qspi0_pins: qspi0 {
 		groups = "qspi0_ctrl", "qspi0_data2";
 		function = "qspi0";
@@ -94,6 +132,18 @@
 		function = "scif1";
 	};
 
+	sdhi2_pins: sd2 {
+		groups = "sdhi2_data4", "sdhi2_ctrl";
+		function = "sdhi2";
+		power-source = <3300>;
+	};
+
+	sdhi2_pins_uhs: sd2_uhs {
+		groups = "sdhi2_data4", "sdhi2_ctrl";
+		function = "sdhi2";
+		power-source = <1800>;
+	};
+
 	usb0_pins: usb0 {
 		groups = "usb0";
 		function = "usb0";
@@ -133,6 +183,31 @@
 	status = "okay";
 };
 
+&sdhi1 {
+	pinctrl-0 = <&mmc_pins_uhs>;
+	pinctrl-names = "state_uhs";
+
+	vmmc-supply = <&reg_3p3v>;
+	vqmmc-supply = <&reg_1p8v>;
+	bus-width = <8>;
+	mmc-hs200-1_8v;
+	non-removable;
+	fixed-emmc-driver-type = <1>;
+	status = "okay";
+};
+
+&sdhi2 {
+	pinctrl-0 = <&sdhi2_pins>;
+	pinctrl-1 = <&sdhi2_pins_uhs>;
+	pinctrl-names = "default", "state_uhs";
+
+	vmmc-supply = <&reg_3p3v>;
+	vqmmc-supply = <&vccq_sdhi2>;
+	bus-width = <4>;
+	cd-gpios = <&gpio4 20 GPIO_ACTIVE_LOW>;
+	status = "okay";
+};
+
 &usb2_phy0 {
 	status = "okay";
 };
-- 
2.7.4

[cip-dev] [PATCH 4.4.y-cip 00/83] Add RZ/G1C SD/eMMC support

[Pavel Machek]

Hi!

> This patch series add SD/eMMC support support for RZ/G1C sbc.
> 
> RZ/G1C eMMC IP is different from other RZ/G1 SoC's. It is having an 
> internal DMA for data transfer which is similar to R-Car Gen3.
> 
> Support for internal DMAC is added in 4.14 kernel and support for 
> RZ/G1C added on 4.20 kernel.
> 
> Backported the relevent patches to linux-4.4.y-cip.
> 
> This patch series is based on linux-4.4.y-cip and all the patches
> in this series are cherry-picked from linux rc tree.

Thanks for the series. I'm currently reviewing it, I have some
comments but nothing really bad so far. I'm now around the middle.

Best regards,
								Pavel
-- 
DENX Software Engineering GmbH,      Managing Director: Wolfgang Denk
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
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[cip-dev] [PATCH 4.4.y-cip 02/83] mmc: tmio_dma: remove debug messages with little information

[Pavel Machek]

Hi!

> From: Wolfram Sang <wsa+renesas@sang-engineering.com>
> 
> commit 254d1456560fa42d4ca901c9b9308e87c951fee1 upstream.
> 
> When compiling the driver with CONFIG_MMC_DEBUG set, I got build
> warnings. They have been 'fixed' meanwhile. However, because these debug
> messages look random anyhow (some duplicate information printed etc),
> let's just drop them and rather re-add something consistent if that
> should ever be needed.

Its too late to change that now, but 1/ fixes messages and then 2/
just deletes them. Single patch would do.

Best regards,
								Pavel
-- 
DENX Software Engineering GmbH,      Managing Director: Wolfgang Denk
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
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[cip-dev] [PATCH 4.4.y-cip 15/83] mmc: tmio: stop clock when 0Hz is requested

[Pavel Machek]

Hi!

> From: Wolfram Sang <wsa+renesas@sang-engineering.com>
> 
> commit 148634d24d4a7dc82a49efcf1a215e1d0695f62c upstream.
> 
> Setting frequency to 0 is not enough, the clock explicitly has to be
> disabled. Otherwise voltage switching (which needs SDCLK to be quiet)
> fails for various cards.
> 
> Because we now do the 'new_clock == 0' check right at the beginning,
> the indentation level of the rest of the code can be decreased a
> little.

>  {
>  	u32 clk = 0, clock;
>

clk = 0 initialization is never used.

> +	for (clk = 0x80000080; new_clock >= (clock << 1); clk >>= 1)
> +		clock <<= 1;

This is black magic. Where does 0x80000080 come from? Would it be
possible to get some comment/explanation?

> +	/* 1/1 clock is option */
> +	if ((host->pdata->flags & TMIO_MMC_CLK_ACTUAL) && ((clk >> 22) & 0x1))
> +		clk |= 0xff;
>  
>  	if (host->set_clk_div)
>  		host->set_clk_div(host->pdev, (clk >> 22) & 1);

What does bit 22 in clk mean? Should it go to temporary variable with
explanation? (Also it is & 1 in one operation and & 0x1 in other
operation).

It seems that low bits of clk variable are used as an actual clock
divider, with high bit doing something else. That is quite
confusing...

Best regards,
								Pavel

-- 
DENX Software Engineering GmbH,      Managing Director: Wolfgang Denk
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
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[cip-dev] [PATCH 4.4.y-cip 02/83] mmc: tmio_dma: remove debug messages with little information

[Biju Das]

Hi Pavel,

Thanks for the feedback

> -----Original Message-----
> From: Pavel Machek <pavel@denx.de>
> Sent: Friday, November 8, 2019 9:08 AM
> To: Biju Das <biju.das@bp.renesas.com>
> Cc: cip-dev at lists.cip-project.org; Nobuhiro Iwamatsu
> <nobuhiro1.iwamatsu@toshiba.co.jp>; Pavel Machek <pavel@denx.de>;
> Chris Paterson <Chris.Paterson2@renesas.com>; Fabrizio Castro
> <fabrizio.castro@bp.renesas.com>
> Subject: Re: [PATCH 4.4.y-cip 02/83] mmc: tmio_dma: remove debug
> messages with little information
> 
> Hi!
> 
> > From: Wolfram Sang <wsa+renesas@sang-engineering.com>
> >
> > commit 254d1456560fa42d4ca901c9b9308e87c951fee1 upstream.
> >
> > When compiling the driver with CONFIG_MMC_DEBUG set, I got build
> > warnings. They have been 'fixed' meanwhile. However, because these
> > debug messages look random anyhow (some duplicate information printed
> > etc), let's just drop them and rather re-add something consistent if
> > that should ever be needed.
> 
> Its too late to change that now, but 1/ fixes messages and then 2/ just
> deletes them. Single patch would do.

Are you ok to merge this patches while applying? or Do you want me to send another series fixing this?
Please let me know.

Regards,
Biju

[cip-dev] [PATCH 4.4.y-cip 18/83] mmc: tmio: remove now unneeded seperate irq handlers

[Pavel Machek]

Hi!

> We removed installation of separate handlers previously, so we can also
> remove the separate handlers.

> -
> -irqreturn_t tmio_mmc_sdio_irq(int irq, void *devid)
> +static bool tmio_mmc_sdio_irq(int irq, void *devid)
>  {
>  	struct tmio_mmc_host *host = devid;
>  	struct mmc_host *mmc = host->mmc;
> @@ -720,7 +696,7 @@ irqreturn_t tmio_mmc_sdio_irq(int irq, void *devid)
>  	unsigned int sdio_status;
>  
>  	if (!(pdata->flags & TMIO_MMC_SDIO_IRQ))
> -		return IRQ_NONE;
> +		return false;
>  
>  	status = sd_ctrl_read16(host, CTL_SDIO_STATUS);
>  	ireg = status & TMIO_SDIO_MASK_ALL & ~host->sdcard_irq_mask;
> @@ -734,9 +710,8 @@ irqreturn_t tmio_mmc_sdio_irq(int irq, void *devid)
>  	if (mmc->caps & MMC_CAP_SDIO_IRQ && ireg & TMIO_SDIO_STAT_IOIRQ)
>  		mmc_signal_sdio_irq(mmc);
>  
> -	return IRQ_RETVAL(ireg);
> +	return ireg;
>  }

I'm not a great fan of function conversion to boolean here. With
irqreturn_t it is clear what the values area; it is more ambiguous
with the bool.

> @@ -751,7 +726,10 @@ irqreturn_t tmio_mmc_irq(int irq, void *devid)
>  	if (__tmio_mmc_sdcard_irq(host, ireg, status))
>  		return IRQ_HANDLED;
>  
> -	return tmio_mmc_sdio_irq(irq, devid);
> +	if (tmio_mmc_sdio_irq(irq, devid))
> +		return IRQ_HANDLED;
> +
> +	return IRQ_NONE;
>  }

And it is converted right back into irqreturn_t here, anyway...

Best regards,
								Pavel
-- 
DENX Software Engineering GmbH,      Managing Director: Wolfgang Denk
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
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[cip-dev] [PATCH 4.4.y-cip 26/83] mmc: tmio/sdhi: introduce flag for RCar 2+ specific features

[Pavel Machek]

Hi!

> @@ -66,8 +66,8 @@
>   */
>  #define TMIO_MMC_SDIO_IRQ		(1 << 2)
>  
> -/* Some controllers don't need to wait 10ms for clock changes */
> -#define TMIO_MMC_FAST_CLK_CHG		(1 << 3)
> +/* Some features are only available or tested on RCar Gen2 or later */
> +#define TMIO_MMC_MIN_RCAR2		(1 << 3)
>  

I'd add a comment here that gen2 allows fast clock changes ... and
whatever other features the driver is actually using.

Best regards,
								Pavel
-- 
DENX Software Engineering GmbH,      Managing Director: Wolfgang Denk
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
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[cip-dev] [PATCH 4.4.y-cip 31/83] mmc: host: sh_mobile_sdhi: move card_busy from tmio to sdhi

[Pavel Machek]

On Thu 2019-11-07 08:32:00, Biju Das wrote:
> From: Wolfram Sang <wsa+renesas@sang-engineering.com>
> 
> commit 6a4679f312357ac7c74c0e1b996efdd1d0a612fa upstream.
> 
> card_busy is only used/tested on SDHI for R-Car Gen2 and later.
> Move it to the SDHI driver, so we can then activate it conditionally
> depending on the SDHI type.


> @@ -217,6 +217,13 @@ static void sh_mobile_sdhi_clk_disable(struct tmio_mmc_host *host)
>  	clk_disable_unprepare(priv->clk);
>  }
>  
> +static int sh_mobile_sdhi_card_busy(struct mmc_host *mmc)
> +{
> +	struct tmio_mmc_host *host = mmc_priv(mmc);
> +
> +	return !(sd_ctrl_read16_and_16_as_32(host, CTL_STATUS) & TMIO_STAT_DAT0);
> +}
> +

Bool would make sense here, if the change is practical without
changing too many interfaces... (and unless interface is something
like 0/1/-ERRNO...)

Best regards,
								Pavel
								
-- 
DENX Software Engineering GmbH,      Managing Director: Wolfgang Denk
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
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[cip-dev] [PATCH 4.4.y-cip 33/83] mmc: tmio: add eMMC support

[Pavel Machek]

On Thu 2019-11-07 08:32:02, Biju Das wrote:
> From: Wolfram Sang <wsa+renesas@sang-engineering.com>
> 
> commit 0bc0b6e86524526c92a9409faea79d53db8e7e6e upstream.
> 
> We need to add R1 without CRC support, refactor the bus width routine a
> little and extend a quirk check. To support "non-removable;" we need a
> workaround which will be hopefully removed when reworking PM soon.

> index addbc71..eafd92d 100644
> --- a/drivers/mmc/host/tmio_mmc.h
> +++ b/drivers/mmc/host/tmio_mmc.h
> @@ -79,6 +79,9 @@
>  #define	CLK_CTL_DIV_MASK	0xff
>  #define	CLK_CTL_SCLKEN		BIT(8)
>  
> +#define CARD_OPT_WIDTH8		BIT(13)
> +#define CARD_OPT_WIDTH		BIT(15)

WIDTH_1 and WIDTH_8 would be better names, for consistency with rest
of code. "WIDTH" without number is quite confusing.

Best regards,
								Pavel
								
> +	/* Some hardware cannot perform 2 byte requests in 4/8 bit mode */
> +	if (host->mmc->ios.bus_width == MMC_BUS_WIDTH_4 ||
> +	    host->mmc->ios.bus_width == MMC_BUS_WIDTH_8) {

-- 
DENX Software Engineering GmbH,      Managing Director: Wolfgang Denk
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
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[cip-dev] [PATCH 4.4.y-cip 36/83] mmc: sh_mobile_sdhi: add ocr_mask option

[Pavel Machek]

Hi!

> commit f19417f38264f9a2f7b4627aa4060133c237b211 upstream.
> 
> In moving platforms from board files to DT, there still needs to be a way
> to set the ocr_mask setting for the tmio driver during probe. Without this
> setting, the probe will fail because the supported voltages are not known.
> 
> This patch will also traditional platform registration platforms to
> migrate to DT.

This is not quite english.

> +++ b/drivers/mmc/host/sh_mobile_sdhi.c
> @@ -49,6 +49,7 @@
>  
>  struct sh_mobile_sdhi_of_data {
>  	unsigned long tmio_flags;
> +	u32	      tmio_ocr_mask;
>  	unsigned long capabilities;
>  	unsigned long capabilities2;
>  	enum dma_slave_buswidth dma_buswidth;
> @@ -370,6 +371,7 @@ static int sh_mobile_sdhi_probe(struct platform_device *pdev)
>  		const struct sh_mobile_sdhi_of_data *of_data = of_id->data;
>  
>  		mmc_data->flags |= of_data->tmio_flags;
> +		mmc_data->ocr_mask = of_data->tmio_ocr_mask;
>  		mmc_data->capabilities |= of_data->capabilities;
>  		mmc_data->capabilities2 |= of_data->capabilities2;
>  		mmc_data->dma_rx_offset = of_data->dma_rx_offset;

And as of_data->tmio_ocr_mask is never written, I don't see how this
can fix the problem effect.

Best regards,

								Pavel
-- 
DENX Software Engineering GmbH,      Managing Director: Wolfgang Denk
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
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[cip-dev] [PATCH 4.4.y-cip 37/83] mmc: tmio: enhance illegal sequence handling

[Pavel Machek]

Hi!

> commit 96e0b2ba00ee5dacb12bed6585145ce784ec9153 upstream.
> 
> An illegal sequence command error may occur if there is a stopbit or
> cmd_index error as well as a CRC error. The correct course of action
> is to re-enable IRQs
> 
> An illegal sequence data error may occur if there is a CRC or stopbit
> error,  or underrun. In this case set data->error correctly.
> 
> This is in preparation for enabling tuning support which relies on
> differentiating between illegal sequence and other errors.
> 

> @@ -609,8 +612,6 @@ static void tmio_mmc_cmd_irq(struct tmio_mmc_host *host,
>  		goto out;
>  	}
>  
> -	host->cmd = NULL;
> -
>  	/* This controller is sicker than the PXA one. Not only do we need to
>  	 * drop the top 8 bits of the first response word, we also need to
>  	 * modify the order of the response for short response command

Is this removal intentional? I'm not sure from the changelog.

Best regards,
								Pavel
-- 
DENX Software Engineering GmbH,      Managing Director: Wolfgang Denk
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
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[cip-dev] [PATCH 4.4.y-cip 40/83] mmc: core: Add helper to see if a host can be retuned

[Pavel Machek]

On Thu 2019-11-07 08:32:09, Biju Das wrote:
> From: Simon Horman <horms+renesas@verge.net.au>
> 
> commit c820af5f18ec248b3cb61a9a9ce47ef0f2e9ec63 upstream.
> 
> This is in preparation for restoring saved tuning parameters
> when resuming the TMIO driver.

> @@ -515,4 +515,9 @@ static inline void mmc_retune_recheck(struct mmc_host *host)
>  		host->retune_now = 1;
>  }
>  
> +static inline bool mmc_can_retune(struct mmc_host *host)
> +{
> +	return host->can_retune == 1;
> +}
> +

Probably not worth changing any more, but it would be easier to review
if it was merged with the first user.

Best regards,
								Pavel

-- 
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HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
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[cip-dev] [PATCH 4.4.y-cip 41/83] mmc: tmio: Add tuning support

[Pavel Machek]

Hi!

> commit 4f11997773b6b452b5a0d620c5ac5050e75c227e upstream.
> 
> Add tuning support for use with SDR104 mode
> 

> +	/* Tuning values: 1 for success, 0 for failure */
> +	DECLARE_BITMAP(taps, BITS_PER_BYTE * sizeof(long));

I don't see why tuning should depend on register size (thus
sizeof(long)) of the host CPU. If 32 is enough, put 32 there... if
not, just use 64?

> +	if (host->tap_num * 2 >= sizeof(host->taps) * BITS_PER_BYTE) {
> +		dev_warn_once(&host->pdev->dev,
> +		      "Too many taps, skipping tuning. Please consider updating size of taps field of tmio_mmc_host\n");
> +		goto out;
> +	}

Or perhaps introduce a #define MAX_TAPS; it will be cleaner than
checking bit sizes like this.

Best regards,
							Pavel

-- 
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HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
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[cip-dev] [PATCH 4.4.y-cip 56/83] mmc: host: tmio: refactor calls to sdio irq

[Pavel Machek]

On Thu 2019-11-07 08:32:25, Biju Das wrote:
> From: Wolfram Sang <wsa+renesas@sang-engineering.com>
> 
> commit e4f38eb18aedd098b3019e82df07f583a5cbcc58 upstream.
> 
> tmio_mmc_sdio_irq() is not used as a seperate irq handler anymore, so we
> can make it similar to the other irq helper functions, namely:
> 
> * only give the host as argument function which is what it really needs
> * prefix function name with __
> 

> +++ b/drivers/mmc/host/tmio_mmc_pio.c
> @@ -709,7 +709,7 @@ static bool __tmio_mmc_sdcard_irq(struct tmio_mmc_host *host,
>  	return false;
>  }
>  
> -static bool tmio_mmc_sdio_irq(int irq, void *devid)
> +static bool __tmio_mmc_sdio_irq(int irq, void *devid)
>  {
>  	struct tmio_mmc_host *host = devid;
>  	struct mmc_host *mmc = host->mmc;


In mainline, the commit removes the argument, as it says in the
changelog. Not here in the backport. Why the difference?

Best regards,
							Pavel
-- 
DENX Software Engineering GmbH,      Managing Director: Wolfgang Denk
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
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[cip-dev] [PATCH 4.4.y-cip 63/83] mmc: tmio: always get number of taps

[Pavel Machek]

Hi!

> commit 43b0b361b0170030603cf76f70b099f3323edcf3 upstream.
> 
> Current code gets number of taps only once and keeps the value. This is
> not correct, we need to obtain it every time before executing tuning,
> so remove the outer if-block.

I'd somehow assume number of tuning parameters would be fixed... Does
the hardware really change it? Out of curiosity, why is it doing so?

Best regards,
								Pavel
-- 
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HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
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[cip-dev] [PATCH 4.4.y-cip 66/83] mmc: tmio: rename tmio_mmc_{pio => core}.c

[Pavel Machek]

Hi!

> commit 426e95d1766bad20e59f219af64fdd50c39bcfee upstream.
> 
> Rename tmio_mmc_pio.c to tmio_mmc_core.c to more accurately reflect its
> function: to provide core code for the tmio-mmc and sh-mobole-sdhi drivers.
> 
> Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
> Acked-by: Arnd Bergmann <arnd@arndb.de>
> Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
> Signed-off-by: Biju Das <biju.das@bp.renesas.com>
> ---
>  drivers/mmc/host/Makefile        |    1 -
>  drivers/mmc/host/tmio_mmc_core.c | 1394 ++++++++++++++++++++++++++++++++++++++
>  drivers/mmc/host/tmio_mmc_pio.c  | 1394 --------------------------------------

This patch creates tmio_mmc_core.c ...

> +++ b/drivers/mmc/host/Makefile
> @@ -36,7 +36,6 @@ obj-$(CONFIG_MMC_S3C)   	+= s3cmci.o
>  obj-$(CONFIG_MMC_SDRICOH_CS)	+= sdricoh_cs.o
>  obj-$(CONFIG_MMC_TMIO)		+= tmio_mmc.o
>  obj-$(CONFIG_MMC_TMIO_CORE)	+= tmio_mmc_core.o
> -tmio_mmc_core-y			:= tmio_mmc_pio.o
>  obj-$(CONFIG_MMC_SDHI)		+= sh_mobile_sdhi.o tmio_mmc_dma.o
>  obj-$(CONFIG_MMC_CB710)		+= cb710-mmc.o
>  obj-$(CONFIG_MMC_VIA_SDMMC)	+= via-sdmmc.o

... which is already present in the Makefile before the patch. That
can't be right.

Best regards,
								Pavel
-- 
DENX Software Engineering GmbH,      Managing Director: Wolfgang Denk
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
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[cip-dev] [PATCH 4.4.y-cip 69/83] mmc: renesas-sdhi: make renesas_sdhi_sys_dmac main module file

[Pavel Machek]

On Thu 2019-11-07 08:32:38, Biju Das wrote:
> From: Simon Horman <horms+renesas@verge.net.au>
> 
> commit 9d08428afb722fedaea699a32aaf603a8f1ebd5a upstream.
> 
> Make renesas_sdhi_sys_dmac.c a top-level module file that makes use of
> library code supplied by renesas_sdhi_core.c
> 
> This is in order to facilitate adding other variants of SDHI;
> in particular SDHI using different DMA controllers.

Patches 66 to 69 do a big rename while changing the code in
question. That makes them hard / tricky to review. I should review
that again, either now or in next version of the patch.

> -static int renesas_sdhi_probe(struct platform_device *pdev)
> +int renesas_sdhi_probe(struct platform_device *pdev,
> +		       const struct tmio_mmc_dma_ops *dma_ops)
>  {
> -	const struct renesas_sdhi_of_data *of_data = of_device_get_match_data(&pdev->dev);
> +	const struct renesas_sdhi_of_data *of_data = of_device_get_match_data( &pdev->dev);
>  	struct renesas_sdhi *priv;

Prototype changed here. The space was added in the wrong place.

> @@ -46,8 +119,6 @@ static void renesas_sdhi_sys_dmac_dma_callback(void *arg)
>  {
>  	struct tmio_mmc_host *host = arg;
>  
> -	wait_for_completion(&host->dma_dataend);
> -
>  	spin_lock_irq(&host->lock);
>  
>  	if (!host->data)
> @@ -62,6 +133,11 @@ static void renesas_sdhi_sys_dmac_dma_callback(void *arg)
>  			     host->sg_ptr, host->sg_len,
>  			     DMA_TO_DEVICE);
>  
> +	spin_unlock_irq(&host->lock);
> +
> +	wait_for_completion(&host->dma_dataend);
> +
> +	spin_lock_irq(&host->lock);
>  	tmio_mmc_do_data_irq(host);
>  out:
>  	spin_unlock_irq(&host->lock);

But this is worse: wait_for_completion is moving around, along with
locking changes. Change is not documented and is not present in
upstream version of the commit.

Best regards,
								Pavel
-- 
DENX Software Engineering GmbH,      Managing Director: Wolfgang Denk
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
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[cip-dev] [PATCH 4.4.y-cip 71/83] mmc: tmio, renesas-sdhi: add max_{segs, blk_count} to tmio_mmc_data

[Pavel Machek]

Hi!

> commit 603aa14d3daaa7073bab4c472025c4963030e0cc upstream.
> 
> Allow TMIO and SDHI driver implementations to provide values for
> max_segs and max_blk_count.
> 
> A follow-up patch will set these values for Renesas Gen3 SoCs
> the using an SDHI driver.
> 
> Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>

> +++ b/drivers/mmc/host/tmio_mmc_core.c
> @@ -1224,10 +1224,10 @@ int tmio_mmc_host_probe(struct tmio_mmc_host *_host,
>  
>  	mmc->caps |= MMC_CAP_4_BIT_DATA | pdata->capabilities;
>  	mmc->caps2 |= pdata->capabilities2;
> -	mmc->max_segs = 32;
> +	mmc->max_segs = pdata->max_segs ? : 32;
>  	mmc->max_blk_size = 512;
> -	mmc->max_blk_count = (PAGE_CACHE_SIZE / mmc->max_blk_size) *
> -		mmc->max_segs;
> +	mmc->max_blk_count = pdata->max_blk_count ? :
> +		(PAGE_SIZE / mmc->max_blk_size) * mmc->max_segs;
>  	mmc->max_req_size = mmc->max_blk_size * mmc->max_blk_count;
>  	mmc->max_seg_size = mmc->max_req_size;

This also changes PAGE_CACHE_SIZE -> PAGE_SIZE. I guess that's
okay/bugfix, as PAGE_CACHE_SIZE probably is equal to PAGE_SIZE in all
relevant configurations, but...

Best regards,
								Pavel
-- 
DENX Software Engineering GmbH,      Managing Director: Wolfgang Denk
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
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[cip-dev] [PATCH 4.4.y-cip 00/83] Add RZ/G1C SD/eMMC support

[Chris Paterson]

Hello Pavel,

> From: Pavel Machek <pavel@denx.de>
> Sent: 07 November 2019 21:02
>
> Hi!
>
> > This patch series add SD/eMMC support support for RZ/G1C sbc.
> >
> > RZ/G1C eMMC IP is different from other RZ/G1 SoC's. It is having an
> > internal DMA for data transfer which is similar to R-Car Gen3.
> >
> > Support for internal DMAC is added in 4.14 kernel and support for
> > RZ/G1C added on 4.20 kernel.
> >
> > Backported the relevent patches to linux-4.4.y-cip.
> >
> > This patch series is based on linux-4.4.y-cip and all the patches
> > in this series are cherry-picked from linux rc tree.
>
> Thanks for the series. I'm currently reviewing it, I have some
> comments but nothing really bad so far. I'm now around the middle.

Thank you for your work on reviewing this series.

Looking at some of your comments, it looks like there are lots of issues to do with the original patches that were upstreamed, rather than changes that were made specifically for the CIP Kernel.

My understanding is that the CIP project follows an upstream first policy, i.e. code must all be upstreamed before being backported to the CIP kernel(s).

For the changes that you're pointing out, should we be upstreaming the relevant fixes, waiting for them to be released upstream, then re-submitting the whole patch series? Or should we be modifying the patches that we're submitting to the CIP kernel directly?

If the former, I'm not actually sure this will always be technically possible.
If the latter, do you want Biju to update each of the patches in his series? Or submit the new cip-specific changes in a new patch?

Kind regards, Chris

>
> Best regards,
> ????? ??????? ??????? ??????? ??????? ??????? ??????? ??????? Pavel
> --
> DENX Software Engineering GmbH,????? Managing Director: Wolfgang Denk
> HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany

[cip-dev] [PATCH 4.4.y-cip 74/83] mmc: tmio-mmc: fix bad pointer math

[Pavel Machek]

Hi!

> From: Chris Brandt <chris.brandt@renesas.com>
> 
> commit b5dd7985e8d3357ff9537c0be231190ab1a131fe upstream.
> 
> commit 9c284c41c0886f09e75c323a16278b6d353b0b4a upstream.
> 
> The existing code gives an incorrect pointer value.
> The buffer pointer 'buf' was of type unsigned short *, and 'count' was a
> number in bytes. A cast of buf should have been used.
> 
> However, instead of casting, just change the code to use u32
> pointers.

Yep, I see, nasty; silent data corruption. Could this be merged to the
patch that introduces the problem, or the original patch somehow
modified that it will not corrupt data ... for example during bisection?

> +++ b/drivers/mmc/host/tmio_mmc_core.c
> @@ -446,30 +446,29 @@ static void tmio_mmc_transfer_data(struct tmio_mmc_host *host,
>  	 * Transfer the data
>  	 */
>  	if (host->pdata->flags & TMIO_MMC_32BIT_DATA_PORT) {
> -		u8 data[4] = { };
> +		u32 data = 0;
> +		u32 *buf32 = (u32 *)buf;
>  
>  		if (is_read)
> -			sd_ctrl_read32_rep(host, CTL_SD_DATA_PORT, (u32 *)buf,
> +			sd_ctrl_read32_rep(host, CTL_SD_DATA_PORT, buf32,
>  					   count >> 2);
>  		else
> -			sd_ctrl_write32_rep(host, CTL_SD_DATA_PORT, (u32 *)buf,
> +			sd_ctrl_write32_rep(host, CTL_SD_DATA_PORT, buf32,
>  					    count >> 2);
>  
>  		/* if count was multiple of 4 */
>  		if (!(count & 0x3))
>  			return;
>  
> -		buf8 = (u8 *)(buf + (count >> 2));
> +		buf32 += count >> 2;
>  		count %= 4;

Can we do count &= 0x3, to keep style of if () above? Actually you can
do 

    count &= 0x3;
    if (!count) return;

Plus, there's code handling 16 bit case just below this; it is
different in style, and by using

    *buf8 = sd_ctrl_read16(host, CTL_SD_DATA_PORT) & 0xff;

instead of read16_rep(), it is buggy on big endian (as comment
says). Perhaps synchronizing to similar, non-buggy version would be
good?

Best regards,
								Pavel
-- 
DENX Software Engineering GmbH,      Managing Director: Wolfgang Denk
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
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[cip-dev] [PATCH 4.4.y-cip 00/83] Add RZ/G1C SD/eMMC support

[Pavel Machek]

Hi!

> Thank you for your work on reviewing this series.

(For the record, I'm now done with the review... with exception of
renames&modifications in 66-69).

> Looking at some of your comments, it looks like there are lots of issues to do with the original patches that were upstreamed, rather than changes that were made specifically for the CIP Kernel.
> 
> My understanding is that the CIP project follows an upstream first policy, i.e. code must all be upstreamed before being backported to the CIP kernel(s).
> 
> For the changes that you're pointing out, should we be upstreaming the relevant fixes, waiting for them to be released upstream, then re-submitting the whole patch series? Or should we be modifying the patches that we're submitting to the CIP kernel directly?
>

It really depends on case by case basis -- on severity of the problem.

I can take explanations, maybe I'm just misunderstanding the code.

Or perhaps code is really right, but unclear/needs additional comment,
etc... In such case I guess we can take patch as is, and just queue
cleanups/comments to the mainline.

But patch 34/ introduces data corrupting bug, which is only fixed at
the end of the series. I'd prefer having patches changed / reshuffled
/ something so that it does not corrupt someone's data during bisect.

Plus we need to figure out how to review the renames.

> If the former, I'm not actually sure this will always be technically possible.
> If the latter, do you want Biju to update each of the patches in his series? Or submit the new cip-specific changes in a new patch?
>

Not sure really.

One possible way forward would be to submit 1..33/ as separate series,
then figure out 34.. first rename, then figure out the rest.

Best regards,

								Pavel
-- 
DENX Software Engineering GmbH,      Managing Director: Wolfgang Denk
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
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[cip-dev] [PATCH 4.4.y-cip 02/83] mmc: tmio_dma: remove debug messages with little information

[Pavel Machek]

Hi!

> > > From: Wolfram Sang <wsa+renesas@sang-engineering.com>
> > >
> > > commit 254d1456560fa42d4ca901c9b9308e87c951fee1 upstream.
> > >
> > > When compiling the driver with CONFIG_MMC_DEBUG set, I got build
> > > warnings. They have been 'fixed' meanwhile. However, because these
> > > debug messages look random anyhow (some duplicate information printed
> > > etc), let's just drop them and rather re-add something consistent if
> > > that should ever be needed.
> > 
> > Its too late to change that now, but 1/ fixes messages and then 2/ just
> > deletes them. Single patch would do.
> 
> Are you ok to merge this patches while applying? or Do you want me to send another series fixing this?
> Please let me know.

I believe this is minor detail, and we can use the patches as-is.

See my reply to Chris for thoughts about rest of the series.

Best regards,
								Pavel
-- 
DENX Software Engineering GmbH,      Managing Director: Wolfgang Denk
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
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[cip-dev] [PATCH 4.4.y-cip 15/83] mmc: tmio: stop clock when 0Hz is requested

[Biju Das]

Hi Pavel,

>
> Subject: Re: [PATCH 4.4.y-cip 15/83] mmc: tmio: stop clock when 0Hz is
> requested
> 
> Hi!
> 
> > From: Wolfram Sang <wsa+renesas@sang-engineering.com>
> >
> > commit 148634d24d4a7dc82a49efcf1a215e1d0695f62c upstream.
> >
> > Setting frequency to 0 is not enough, the clock explicitly has to be
> > disabled. Otherwise voltage switching (which needs SDCLK to be quiet)
> > fails for various cards.
> >
> > Because we now do the 'new_clock == 0' check right at the beginning,
> > the indentation level of the rest of the code can be decreased a
> > little.
> 
> >  {
> >  	u32 clk = 0, clock;
> >
> 
> clk = 0 initialization is never used.
> 
> > +	for (clk = 0x80000080; new_clock >= (clock << 1); clk >>= 1)
> > +		clock <<= 1;
> 
> This is black magic. Where does 0x80000080 come from? Would it be possible
> to get some comment/explanation?
> 
> > +	/* 1/1 clock is option */
> > +	if ((host->pdata->flags & TMIO_MMC_CLK_ACTUAL) && ((clk >> 22)
> & 0x1))
> > +		clk |= 0xff;
> >
> >  	if (host->set_clk_div)
> >  		host->set_clk_div(host->pdev, (clk >> 22) & 1);
> 
> What does bit 22 in clk mean? Should it go to temporary variable with
> explanation? (Also it is & 1 in one operation and & 0x1 in other operation).
> 
> It seems that low bits of clk variable are used as an actual clock divider, with
> high bit doing something else. That is quite confusing...

Yes I agree this could have been done with Macro. Not sure,  may be because of HALA [SD Host/Ancillary Product License Agreement],
 it is defined as magic number at that time.

Regards,
Biju

[cip-dev] [PATCH 4.4.y-cip 18/83] mmc: tmio: remove now unneeded seperate irq handlers

[Biju Das]

Hi Pavel,

> Subject: Re: [PATCH 4.4.y-cip 18/83] mmc: tmio: remove now unneeded
> seperate irq handlers
> 
> Hi!
> 
> > We removed installation of separate handlers previously, so we can
> > also remove the separate handlers.
> 
> > -
> > -irqreturn_t tmio_mmc_sdio_irq(int irq, void *devid)
> > +static bool tmio_mmc_sdio_irq(int irq, void *devid)
> >  {
> >  	struct tmio_mmc_host *host = devid;
> >  	struct mmc_host *mmc = host->mmc;
> > @@ -720,7 +696,7 @@ irqreturn_t tmio_mmc_sdio_irq(int irq, void *devid)
> >  	unsigned int sdio_status;
> >
> >  	if (!(pdata->flags & TMIO_MMC_SDIO_IRQ))
> > -		return IRQ_NONE;
> > +		return false;
> >
> >  	status = sd_ctrl_read16(host, CTL_SDIO_STATUS);
> >  	ireg = status & TMIO_SDIO_MASK_ALL & ~host->sdcard_irq_mask;
> @@
> > -734,9 +710,8 @@ irqreturn_t tmio_mmc_sdio_irq(int irq, void *devid)
> >  	if (mmc->caps & MMC_CAP_SDIO_IRQ && ireg &
> TMIO_SDIO_STAT_IOIRQ)
> >  		mmc_signal_sdio_irq(mmc);
> >
> > -	return IRQ_RETVAL(ireg);
> > +	return ireg;
> >  }
> 
> I'm not a great fan of function conversion to boolean here. With irqreturn_t it
> is clear what the values area; it is more ambiguous with the bool.

> > @@ -751,7 +726,10 @@ irqreturn_t tmio_mmc_irq(int irq, void *devid)
> >  	if (__tmio_mmc_sdcard_irq(host, ireg, status))
> >  		return IRQ_HANDLED;
> >
> > -	return tmio_mmc_sdio_irq(irq, devid);
> > +	if (tmio_mmc_sdio_irq(irq, devid))
> > +		return IRQ_HANDLED;
> > +
> > +	return IRQ_NONE;
> >  }
> 
> And it is converted right back into irqreturn_t here, anyway...

Yes, it looks ok now.

Regards,
Biju

[cip-dev] [PATCH 4.4.y-cip 26/83] mmc: tmio/sdhi: introduce flag for RCar 2+ specific features

[Biju Das]

Hi Pavel,
[>] 
> Subject: Re: [PATCH 4.4.y-cip 26/83] mmc: tmio/sdhi: introduce flag for RCar
> 2+ specific features
> 
> Hi!
> 
> > @@ -66,8 +66,8 @@
> >   */
> >  #define TMIO_MMC_SDIO_IRQ		(1 << 2)
> >
> > -/* Some controllers don't need to wait 10ms for clock changes */
> > -#define TMIO_MMC_FAST_CLK_CHG		(1 << 3)
> > +/* Some features are only available or tested on RCar Gen2 or later */
> > +#define TMIO_MMC_MIN_RCAR2		(1 << 3)
> >
> 
> I'd add a comment here that gen2 allows fast clock changes ... and whatever
> other features the driver is actually using.

Yes, I agree it should have done in the mainline first.

Regards,
Biju

[cip-dev] [PATCH 4.4.y-cip 31/83] mmc: host: sh_mobile_sdhi: move card_busy from tmio to sdhi

[Biju Das]

Hi Pavel,

> Subject: Re: [PATCH 4.4.y-cip 31/83] mmc: host: sh_mobile_sdhi: move
> card_busy from tmio to sdhi
> 
> On Thu 2019-11-07 08:32:00, Biju Das wrote:
> > From: Wolfram Sang <wsa+renesas@sang-engineering.com>
> >
> > commit 6a4679f312357ac7c74c0e1b996efdd1d0a612fa upstream.
> >
> > card_busy is only used/tested on SDHI for R-Car Gen2 and later.
> > Move it to the SDHI driver, so we can then activate it conditionally
> > depending on the SDHI type.
> 
> 
> > @@ -217,6 +217,13 @@ static void sh_mobile_sdhi_clk_disable(struct
> tmio_mmc_host *host)
> >  	clk_disable_unprepare(priv->clk);
> >  }
> >
> > +static int sh_mobile_sdhi_card_busy(struct mmc_host *mmc) {
> > +	struct tmio_mmc_host *host = mmc_priv(mmc);
> > +
> > +	return !(sd_ctrl_read16_and_16_as_32(host, CTL_STATUS) &
> > +TMIO_STAT_DAT0); }
> > +
> 
> Bool would make sense here, if the change is practical without changing too
> many interfaces... (and unless interface is something like 0/1/-ERRNO...)
> 

Yes I agree with you. Last statement is clearly returns a Boolean value.

Regards,
Biju

[cip-dev] [PATCH 4.4.y-cip 33/83] mmc: tmio: add eMMC support

[Biju Das]

Hi Pavel,

> Subject: Re: [PATCH 4.4.y-cip 33/83] mmc: tmio: add eMMC support
> 
> On Thu 2019-11-07 08:32:02, Biju Das wrote:
> > From: Wolfram Sang <wsa+renesas@sang-engineering.com>
> >
> > commit 0bc0b6e86524526c92a9409faea79d53db8e7e6e upstream.
> >
> > We need to add R1 without CRC support, refactor the bus width routine
> > a little and extend a quirk check. To support "non-removable;" we need
> > a workaround which will be hopefully removed when reworking PM soon.
> 
> > index addbc71..eafd92d 100644
> > --- a/drivers/mmc/host/tmio_mmc.h
> > +++ b/drivers/mmc/host/tmio_mmc.h
> > @@ -79,6 +79,9 @@
> >  #define	CLK_CTL_DIV_MASK	0xff
> >  #define	CLK_CTL_SCLKEN		BIT(8)
> >
> > +#define CARD_OPT_WIDTH8		BIT(13)
> > +#define CARD_OPT_WIDTH		BIT(15)
> 
> WIDTH_1 and WIDTH_8 would be better names, for consistency with rest of
> code. "WIDTH" without number is quite confusing.

I agree, it is little bit confusing. May be we should fixing this Mainline first and then backport to cip kernel.

Cheers,
Biju
 
> > +	/* Some hardware cannot perform 2 byte requests in 4/8 bit mode
> */
> > +	if (host->mmc->ios.bus_width == MMC_BUS_WIDTH_4 ||
> > +	    host->mmc->ios.bus_width == MMC_BUS_WIDTH_8) {
> 
> --
> DENX Software Engineering GmbH,      Managing Director: Wolfgang Denk
> HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany

[cip-dev] [PATCH 4.4.y-cip 37/83] mmc: tmio: enhance illegal sequence handling

[Biju Das]

HI Pavel,

> Subject: Re: [PATCH 4.4.y-cip 37/83] mmc: tmio: enhance illegal sequence
> handling
> 
> Hi!
> 
> > commit 96e0b2ba00ee5dacb12bed6585145ce784ec9153 upstream.
> >
> > An illegal sequence command error may occur if there is a stopbit or
> > cmd_index error as well as a CRC error. The correct course of action
> > is to re-enable IRQs
> >
> > An illegal sequence data error may occur if there is a CRC or stopbit
> > error,  or underrun. In this case set data->error correctly.
> >
> > This is in preparation for enabling tuning support which relies on
> > differentiating between illegal sequence and other errors.
> >
> 
> > @@ -609,8 +612,6 @@ static void tmio_mmc_cmd_irq(struct
> tmio_mmc_host *host,
> >  		goto out;
> >  	}
> >
> > -	host->cmd = NULL;
> > -
> >  	/* This controller is sicker than the PXA one. Not only do we need to
> >  	 * drop the top 8 bits of the first response word, we also need to
> >  	 * modify the order of the response for short response command
> 
> Is this removal intentional? I'm not sure from the changelog.

Yes, it is not clear from the changelog.

Regards,
Biju

[cip-dev] [PATCH 4.4.y-cip 41/83] mmc: tmio: Add tuning support

[Biju Das]

Hi Pavel,

> Subject: Re: [PATCH 4.4.y-cip 41/83] mmc: tmio: Add tuning support
> 
> Hi!
> 
> > commit 4f11997773b6b452b5a0d620c5ac5050e75c227e upstream.
> >
> > Add tuning support for use with SDR104 mode
> >
> 
> > +	/* Tuning values: 1 for success, 0 for failure */
> > +	DECLARE_BITMAP(taps, BITS_PER_BYTE * sizeof(long));
> 
> I don't see why tuning should depend on register size (thus
> sizeof(long)) of the host CPU. If 32 is enough, put 32 there... if not, just use
> 64?
> 
> > +	if (host->tap_num * 2 >= sizeof(host->taps) * BITS_PER_BYTE) {
> > +		dev_warn_once(&host->pdev->dev,
> > +		      "Too many taps, skipping tuning. Please consider updating
> size of taps field of tmio_mmc_host\n");
> > +		goto out;
> > +	}
> 
> Or perhaps introduce a #define MAX_TAPS; it will be cleaner than checking
> bit sizes like this.
> 
Yes there is a room for improvement for this patch in Mainline.

Regards,
Biju

[cip-dev] [PATCH 4.4.y-cip 56/83] mmc: host: tmio: refactor calls to sdio irq

[Biju Das]

Hi Pavel,

Thanks for the feedback.

> Subject: Re: [PATCH 4.4.y-cip 56/83] mmc: host: tmio: refactor calls to sdio irq
> 
> On Thu 2019-11-07 08:32:25, Biju Das wrote:
> > From: Wolfram Sang <wsa+renesas@sang-engineering.com>
> >
> > commit e4f38eb18aedd098b3019e82df07f583a5cbcc58 upstream.
> >
> > tmio_mmc_sdio_irq() is not used as a seperate irq handler anymore, so
> > we can make it similar to the other irq helper functions, namely:
> >
> > * only give the host as argument function which is what it really
> > needs
> > * prefix function name with __
> >
> 
> > +++ b/drivers/mmc/host/tmio_mmc_pio.c
> > @@ -709,7 +709,7 @@ static bool __tmio_mmc_sdcard_irq(struct
> tmio_mmc_host *host,
> >  	return false;
> >  }
> >
> > -static bool tmio_mmc_sdio_irq(int irq, void *devid)
> > +static bool __tmio_mmc_sdio_irq(int irq, void *devid)
> >  {
> >  	struct tmio_mmc_host *host = devid;
> >  	struct mmc_host *mmc = host->mmc;
> 
> 
> In mainline, the commit removes the argument, as it says in the changelog.
> Not here in the backport. Why the difference?
> 
Good catch. I will check this. It should not deviate from the original patch.

I will check and let you know.

Regards,
Biju

[cip-dev] [PATCH 4.4.y-cip 63/83] mmc: tmio: always get number of taps

[Biju Das]

Hi Pavel,

> Subject: Re: [PATCH 4.4.y-cip 63/83] mmc: tmio: always get number of taps
> 
> Hi!
> 
> > commit 43b0b361b0170030603cf76f70b099f3323edcf3 upstream.
> >
> > Current code gets number of taps only once and keeps the value. This
> > is not correct, we need to obtain it every time before executing
> > tuning, so remove the outer if-block.
> 
> I'd somehow assume number of tuning parameters would be fixed... Does
> the hardware really change it? Out of curiosity, why is it doing so?

I guess it is for hs200 and hs400 tuning.

Regds,
Biju

[cip-dev] [PATCH 4.4.y-cip 66/83] mmc: tmio: rename tmio_mmc_{pio => core}.c

[Biju Das]

Hi Pavel,

> -----Original Message-----
> From: Pavel Machek <pavel@denx.de>
> Sent: Friday, November 8, 2019 9:48 AM
> To: Biju Das <biju.das@bp.renesas.com>
> Cc: cip-dev at lists.cip-project.org; Nobuhiro Iwamatsu
> <nobuhiro1.iwamatsu@toshiba.co.jp>; Pavel Machek <pavel@denx.de>;
> Chris Paterson <Chris.Paterson2@renesas.com>; Fabrizio Castro
> <fabrizio.castro@bp.renesas.com>
> Subject: Re: [PATCH 4.4.y-cip 66/83] mmc: tmio: rename tmio_mmc_{pio =>
> core}.c
> 
> Hi!
> 
> > commit 426e95d1766bad20e59f219af64fdd50c39bcfee upstream.
> >
> > Rename tmio_mmc_pio.c to tmio_mmc_core.c to more accurately reflect
> > its
> > function: to provide core code for the tmio-mmc and sh-mobole-sdhi
> drivers.
> >
> > Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
> > Acked-by: Arnd Bergmann <arnd@arndb.de>
> > Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
> > Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
> > Signed-off-by: Biju Das <biju.das@bp.renesas.com>
> > ---
> >  drivers/mmc/host/Makefile        |    1 -
> >  drivers/mmc/host/tmio_mmc_core.c | 1394
> > ++++++++++++++++++++++++++++++++++++++
> >  drivers/mmc/host/tmio_mmc_pio.c  | 1394
> > --------------------------------------
> 
> This patch creates tmio_mmc_core.c ...

yes, if you see the subec mmc: tmio: rename tmio_mmc_{pio => core}.c

Is it anything wrong? Am I missing something here?

Regards,
Biju

> > +++ b/drivers/mmc/host/Makefile
> > @@ -36,7 +36,6 @@ obj-$(CONFIG_MMC_S3C)   	+= s3cmci.o
> >  obj-$(CONFIG_MMC_SDRICOH_CS)	+= sdricoh_cs.o
> >  obj-$(CONFIG_MMC_TMIO)		+= tmio_mmc.o
> >  obj-$(CONFIG_MMC_TMIO_CORE)	+= tmio_mmc_core.o
> > -tmio_mmc_core-y			:= tmio_mmc_pio.o
> >  obj-$(CONFIG_MMC_SDHI)		+= sh_mobile_sdhi.o
> tmio_mmc_dma.o
> >  obj-$(CONFIG_MMC_CB710)		+= cb710-mmc.o
> >  obj-$(CONFIG_MMC_VIA_SDMMC)	+= via-sdmmc.o
> 
> ... which is already present in the Makefile before the patch. That can't be
> right.
> 
> Best regards,
> 								Pavel
> --
> DENX Software Engineering GmbH,      Managing Director: Wolfgang Denk
> HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany

[cip-dev] [PATCH 4.4.y-cip 69/83] mmc: renesas-sdhi: make renesas_sdhi_sys_dmac main module file

[Biju Das]

Hi Pavel,

> Subject: Re: [PATCH 4.4.y-cip 69/83] mmc: renesas-sdhi: make
> renesas_sdhi_sys_dmac main module file
> 
> On Thu 2019-11-07 08:32:38, Biju Das wrote:
> > From: Simon Horman <horms+renesas@verge.net.au>
> >
> > commit 9d08428afb722fedaea699a32aaf603a8f1ebd5a upstream.
> >
> > Make renesas_sdhi_sys_dmac.c a top-level module file that makes use of
> > library code supplied by renesas_sdhi_core.c
> >
> > This is in order to facilitate adding other variants of SDHI; in
> > particular SDHI using different DMA controllers.
> 
> Patches 66 to 69 do a big rename while changing the code in question. That
> makes them hard / tricky to review. I should review that again, either now or
> in next version of the patch.

Yes I agree, it is little bit trickier. I am waiting for your comments.

Regards,
biju

> > -static int renesas_sdhi_probe(struct platform_device *pdev)
> > +int renesas_sdhi_probe(struct platform_device *pdev,
> > +		       const struct tmio_mmc_dma_ops *dma_ops)
> >  {
> > -	const struct renesas_sdhi_of_data *of_data =
> of_device_get_match_data(&pdev->dev);
> > +	const struct renesas_sdhi_of_data *of_data =
> > +of_device_get_match_data( &pdev->dev);
> >  	struct renesas_sdhi *priv;
> 
> Prototype changed here. The space was added in the wrong place.
> 
> > @@ -46,8 +119,6 @@ static void
> renesas_sdhi_sys_dmac_dma_callback(void
> > *arg)  {
> >  	struct tmio_mmc_host *host = arg;
> >
> > -	wait_for_completion(&host->dma_dataend);
> > -
> >  	spin_lock_irq(&host->lock);
> >
> >  	if (!host->data)
> > @@ -62,6 +133,11 @@ static void
> renesas_sdhi_sys_dmac_dma_callback(void *arg)
> >  			     host->sg_ptr, host->sg_len,
> >  			     DMA_TO_DEVICE);
> >
> > +	spin_unlock_irq(&host->lock);
> > +
> > +	wait_for_completion(&host->dma_dataend);
> > +
> > +	spin_lock_irq(&host->lock);
> >  	tmio_mmc_do_data_irq(host);
> >  out:
> >  	spin_unlock_irq(&host->lock);
> 
> But this is worse: wait_for_completion is moving around, along with locking
> changes. Change is not documented and is not present in upstream version
> of the commit.
> 
> Best regards,
> 								Pavel
> --
> DENX Software Engineering GmbH,      Managing Director: Wolfgang Denk
> HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany

[cip-dev] [PATCH 4.4.y-cip 71/83] mmc: tmio, renesas-sdhi: add max_{segs, blk_count} to tmio_mmc_data

[Biju Das]

Hi Pavel,

Thanks for the feedback.

> -----Original Message-----
> From: Pavel Machek <pavel@denx.de>
> Sent: Friday, November 8, 2019 10:04 AM
> To: Biju Das <biju.das@bp.renesas.com>
> Cc: cip-dev at lists.cip-project.org; Nobuhiro Iwamatsu
> <nobuhiro1.iwamatsu@toshiba.co.jp>; Pavel Machek <pavel@denx.de>;
> Chris Paterson <Chris.Paterson2@renesas.com>; Fabrizio Castro
> <fabrizio.castro@bp.renesas.com>
> Subject: Re: [PATCH 4.4.y-cip 71/83] mmc: tmio, renesas-sdhi: add
> max_{segs, blk_count} to tmio_mmc_data
> 
> Hi!
> 
> > commit 603aa14d3daaa7073bab4c472025c4963030e0cc upstream.
> >
> > Allow TMIO and SDHI driver implementations to provide values for
> > max_segs and max_blk_count.
> >
> > A follow-up patch will set these values for Renesas Gen3 SoCs the
> > using an SDHI driver.
> >
> > Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
> 
> > +++ b/drivers/mmc/host/tmio_mmc_core.c
> > @@ -1224,10 +1224,10 @@ int tmio_mmc_host_probe(struct
> tmio_mmc_host
> > *_host,
> >
> >  	mmc->caps |= MMC_CAP_4_BIT_DATA | pdata->capabilities;
> >  	mmc->caps2 |= pdata->capabilities2;
> > -	mmc->max_segs = 32;
> > +	mmc->max_segs = pdata->max_segs ? : 32;
> >  	mmc->max_blk_size = 512;
> > -	mmc->max_blk_count = (PAGE_CACHE_SIZE / mmc->max_blk_size)
> *
> > -		mmc->max_segs;
> > +	mmc->max_blk_count = pdata->max_blk_count ? :
> > +		(PAGE_SIZE / mmc->max_blk_size) * mmc->max_segs;
> >  	mmc->max_req_size = mmc->max_blk_size * mmc-
> >max_blk_count;
> >  	mmc->max_seg_size = mmc->max_req_size;
> 
> This also changes PAGE_CACHE_SIZE -> PAGE_SIZE. I guess that's
> okay/bugfix, as PAGE_CACHE_SIZE probably is equal to PAGE_SIZE in all
> relevant configurations, but...

It is a big change from PAGE_CACHE_SIZE -> PAGE_SIZE at start of kernel tree Please see the commit (09cbfea  " mm, fs: get rid of PAGE_CACHE_* and page_cache_{get,release} macros")

Regards,
Biju

[cip-dev] [PATCH 4.4.y-cip 00/83] Add RZ/G1C SD/eMMC support

[Biju Das]

Hello Pavel,

Thanks for the feedback.

> Subject: Re: [PATCH 4.4.y-cip 00/83] Add RZ/G1C SD/eMMC support
> 
> Hi!
> 
> > Thank you for your work on reviewing this series.
> 
> (For the record, I'm now done with the review... with exception of
> renames&modifications in 66-69).
> 
> > Looking at some of your comments, it looks like there are lots of issues to
> do with the original patches that were upstreamed, rather than changes that
> were made specifically for the CIP Kernel.
> >
> > My understanding is that the CIP project follows an upstream first policy,
> i.e. code must all be upstreamed before being backported to the CIP
> kernel(s).
> >
> > For the changes that you're pointing out, should we be upstreaming the
> relevant fixes, waiting for them to be released upstream, then re-submitting
> the whole patch series? Or should we be modifying the patches that we're
> submitting to the CIP kernel directly?
> >
> 
> It really depends on case by case basis -- on severity of the problem.
> 
> I can take explanations, maybe I'm just misunderstanding the code.
> 
> Or perhaps code is really right, but unclear/needs additional comment, etc...
> In such case I guess we can take patch as is, and just queue
> cleanups/comments to the mainline.
> 
> But patch 34/ introduces data corrupting bug, which is only fixed at the end
> of the series. I'd prefer having patches changed / reshuffled / something so
> that it does not corrupt someone's data during bisect.
> 
> Plus we need to figure out how to review the renames.
> 
> > If the former, I'm not actually sure this will always be technically possible.
> > If the latter, do you want Biju to update each of the patches in his series?
> Or submit the new cip-specific changes in a new patch?
> >
> 
> Not sure really.
> 
> One possible way forward would be to submit 1..33/ as separate series, then
> figure out 34.. first rename, then figure out the rest.

OK. I will send 1--33 as a separate series and then rest. 

Regards,
Biju

[cip-dev] [PATCH 4.4.y-cip 00/83] Add RZ/G1C SD/eMMC support

[Pavel Machek]

Hi!

> > Plus we need to figure out how to review the renames.
> > 
> > > If the former, I'm not actually sure this will always be technically possible.
> > > If the latter, do you want Biju to update each of the patches in his series?
> > Or submit the new cip-specific changes in a new patch?
> > >
> > 
> > Not sure really.
> > 
> > One possible way forward would be to submit 1..33/ as separate series, then
> > figure out 34.. first rename, then figure out the rest.
> 
> OK. I will send 1--33 as a separate series and then rest. 

Actually, it seems that review on 1--33 is "minor updates are possible
in mainline", so if you want (and there are no other comments from
other maintainers), I can just take 1--33 and apply them to -cip tree.

Best regards,
								Pavel
-- 
DENX Software Engineering GmbH,      Managing Director: Wolfgang Denk
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
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[cip-dev] [PATCH 4.4.y-cip 66/83] mmc: tmio: rename tmio_mmc_{pio => core}.c

[Pavel Machek]

Hi!

> > > commit 426e95d1766bad20e59f219af64fdd50c39bcfee upstream.
> > >
> > > Rename tmio_mmc_pio.c to tmio_mmc_core.c to more accurately reflect
> > > its
> > > function: to provide core code for the tmio-mmc and sh-mobole-sdhi
> > drivers.
> > >
> > > Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
> > > Acked-by: Arnd Bergmann <arnd@arndb.de>
> > > Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
> > > Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
> > > Signed-off-by: Biju Das <biju.das@bp.renesas.com>
> > > ---
> > >  drivers/mmc/host/Makefile        |    1 -
> > >  drivers/mmc/host/tmio_mmc_core.c | 1394
> > > ++++++++++++++++++++++++++++++++++++++
> > >  drivers/mmc/host/tmio_mmc_pio.c  | 1394
> > > --------------------------------------
> > 
> > This patch creates tmio_mmc_core.c ...
> 
> yes, if you see the subec mmc: tmio: rename tmio_mmc_{pio => core}.c
> 
> Is it anything wrong? Am I missing something here?

There were more comments in my email, see below.

But reading them again, I see I was wrong. Makefile magic was used to
turn tmio_mmc_pio.c into tmio_mmc_core.o, so there's no bug here.

Sorry for the noise.

Best regards,
								Pavel

> > > +++ b/drivers/mmc/host/Makefile
> > > @@ -36,7 +36,6 @@ obj-$(CONFIG_MMC_S3C)   	+= s3cmci.o
> > >  obj-$(CONFIG_MMC_SDRICOH_CS)	+= sdricoh_cs.o
> > >  obj-$(CONFIG_MMC_TMIO)		+= tmio_mmc.o
> > >  obj-$(CONFIG_MMC_TMIO_CORE)	+= tmio_mmc_core.o
> > > -tmio_mmc_core-y			:= tmio_mmc_pio.o
> > >  obj-$(CONFIG_MMC_SDHI)		+= sh_mobile_sdhi.o
> > tmio_mmc_dma.o
> > >  obj-$(CONFIG_MMC_CB710)		+= cb710-mmc.o
> > >  obj-$(CONFIG_MMC_VIA_SDMMC)	+= via-sdmmc.o
> > 
> > ... which is already present in the Makefile before the patch. That can't be
> > right.

-- 
DENX Software Engineering GmbH,      Managing Director: Wolfgang Denk
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
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[cip-dev] [PATCH 4.4.y-cip 69/83] mmc: renesas-sdhi: make renesas_sdhi_sys_dmac main module file

[Pavel Machek]

Hi!

> > On Thu 2019-11-07 08:32:38, Biju Das wrote:
> > > From: Simon Horman <horms+renesas@verge.net.au>
> > >
> > > commit 9d08428afb722fedaea699a32aaf603a8f1ebd5a upstream.
> > >
> > > Make renesas_sdhi_sys_dmac.c a top-level module file that makes use of
> > > library code supplied by renesas_sdhi_core.c
> > >
> > > This is in order to facilitate adding other variants of SDHI; in
> > > particular SDHI using different DMA controllers.
> > 
> > Patches 66 to 69 do a big rename while changing the code in question. That
> > makes them hard / tricky to review. I should review that again, either now or
> > in next version of the patch.
> 
> Yes I agree, it is little bit trickier. I am waiting for your
> comments.

Did you see / do you want to comment on the hunks below? Original
patch is marked by "> > >", my comments are marked by "> >"

Best regards,
								Pavel



> > > -static int renesas_sdhi_probe(struct platform_device *pdev)
> > > +int renesas_sdhi_probe(struct platform_device *pdev,
> > > +		       const struct tmio_mmc_dma_ops *dma_ops)
> > >  {
> > > -	const struct renesas_sdhi_of_data *of_data =
> > of_device_get_match_data(&pdev->dev);
> > > +	const struct renesas_sdhi_of_data *of_data =
> > > +of_device_get_match_data( &pdev->dev);
> > >  	struct renesas_sdhi *priv;
> > 
> > Prototype changed here. The space was added in the wrong place.
> > 
> > > @@ -46,8 +119,6 @@ static void
> > renesas_sdhi_sys_dmac_dma_callback(void
> > > *arg)  {
> > >  	struct tmio_mmc_host *host = arg;
> > >
> > > -	wait_for_completion(&host->dma_dataend);
> > > -
> > >  	spin_lock_irq(&host->lock);
> > >
> > >  	if (!host->data)
> > > @@ -62,6 +133,11 @@ static void
> > renesas_sdhi_sys_dmac_dma_callback(void *arg)
> > >  			     host->sg_ptr, host->sg_len,
> > >  			     DMA_TO_DEVICE);
> > >
> > > +	spin_unlock_irq(&host->lock);
> > > +
> > > +	wait_for_completion(&host->dma_dataend);
> > > +
> > > +	spin_lock_irq(&host->lock);
> > >  	tmio_mmc_do_data_irq(host);
> > >  out:
> > >  	spin_unlock_irq(&host->lock);
> > 
> > But this is worse: wait_for_completion is moving around, along with locking
> > changes. Change is not documented and is not present in upstream version
> > of the commit.

-- 
DENX Software Engineering GmbH,      Managing Director: Wolfgang Denk
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
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[cip-dev] [PATCH 4.4.y-cip 66/83] mmc: tmio: rename tmio_mmc_{pio => core}.c

[Biju Das]

Hi Pavel,


> Subject: Re: [PATCH 4.4.y-cip 66/83] mmc: tmio: rename tmio_mmc_{pio =>
> core}.c
> 
> Hi!
> 
> > > > commit 426e95d1766bad20e59f219af64fdd50c39bcfee upstream.
> > > >
> > > > Rename tmio_mmc_pio.c to tmio_mmc_core.c to more accurately
> > > > reflect its
> > > > function: to provide core code for the tmio-mmc and sh-mobole-sdhi
> > > drivers.
> > > >
> > > > Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
> > > > Acked-by: Arnd Bergmann <arnd@arndb.de>
> > > > Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
> > > > Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
> > > > Signed-off-by: Biju Das <biju.das@bp.renesas.com>
> > > > ---
> > > >  drivers/mmc/host/Makefile        |    1 -
> > > >  drivers/mmc/host/tmio_mmc_core.c | 1394
> > > > ++++++++++++++++++++++++++++++++++++++
> > > >  drivers/mmc/host/tmio_mmc_pio.c  | 1394
> > > > --------------------------------------
> > >
> > > This patch creates tmio_mmc_core.c ...
> >
> > yes, if you see the subec mmc: tmio: rename tmio_mmc_{pio => core}.c
> >
> > Is it anything wrong? Am I missing something here?
> 
> There were more comments in my email, see below.
> 
> But reading them again, I see I was wrong. Makefile magic was used to turn
> tmio_mmc_pio.c into tmio_mmc_core.o, so there's no bug here.
> 
> Sorry for the noise.

OK.

Cheers,
Biju

> > > > +++ b/drivers/mmc/host/Makefile
> > > > @@ -36,7 +36,6 @@ obj-$(CONFIG_MMC_S3C)   	+= s3cmci.o
> > > >  obj-$(CONFIG_MMC_SDRICOH_CS)	+= sdricoh_cs.o
> > > >  obj-$(CONFIG_MMC_TMIO)		+= tmio_mmc.o
> > > >  obj-$(CONFIG_MMC_TMIO_CORE)	+= tmio_mmc_core.o
> > > > -tmio_mmc_core-y			:= tmio_mmc_pio.o
> > > >  obj-$(CONFIG_MMC_SDHI)		+= sh_mobile_sdhi.o
> > > tmio_mmc_dma.o
> > > >  obj-$(CONFIG_MMC_CB710)		+= cb710-mmc.o
> > > >  obj-$(CONFIG_MMC_VIA_SDMMC)	+= via-sdmmc.o
> > >
> > > ... which is already present in the Makefile before the patch. That
> > > can't be right.
> 
> --
> DENX Software Engineering GmbH,      Managing Director: Wolfgang Denk
> HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany

[cip-dev] [PATCH 4.4.y-cip 00/83] Add RZ/G1C SD/eMMC support

[Biju Das]

Hi Pavel,

Thanks for the feedback.

> Subject: Re: [PATCH 4.4.y-cip 00/83] Add RZ/G1C SD/eMMC support
> 
> Hi!
> 
> > > Plus we need to figure out how to review the renames.
> > >
> > > > If the former, I'm not actually sure this will always be technically
> possible.
> > > > If the latter, do you want Biju to update each of the patches in his
> series?
> > > Or submit the new cip-specific changes in a new patch?
> > > >
> > >
> > > Not sure really.
> > >
> > > One possible way forward would be to submit 1..33/ as separate
> > > series, then figure out 34.. first rename, then figure out the rest.
> >
> > OK. I will send 1--33 as a separate series and then rest.
> 
> Actually, it seems that review on 1--33 is "minor updates are possible in
> mainline", so if you want (and there are no other comments from other
> maintainers), I can just take 1--33 and apply them to -cip tree.

Yes please, if other maintainers are happy.

Please apply the below patch patch before 33,
https://patchwork.kernel.org/patch/11232167/

Can you please suggest, how you want to handle rest of the patches?

Regards,
Biju

[cip-dev] [PATCH 4.4.y-cip 00/83] Add RZ/G1C SD/eMMC support

[Pavel Machek]

Hi!

> > > Yes please, if other maintainers are happy.
> > >
> > > Please apply the below patch patch before 33,
> > > https://patchwork.kernel.org/patch/11232167/
> > 
> > I applied 1..33. That caused build failure. I added 35, which fixes the compile
> > problem.
> 
> Yes. I knew, that is the reason I provided the above link.

Oops, I was not paying close enough attention. Sorry about that.

> > > Can you please suggest, how you want to handle rest of the patches?
> > 
> > Would it be possible to reorder (and/or merge) patches so that the data
> > corruption bug can not trigger, and re-submit series up-to the big renames?
> > That should give about 30 patches to review...
> 
> Will do.

Thanks!

Best regards,
								Pavel
-- 
DENX Software Engineering GmbH,      Managing Director: Wolfgang Denk
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
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[cip-dev] [PATCH 4.4.y-cip 00/83] Add RZ/G1C SD/eMMC support

[Biju Das]

HI Pavel,

Thanks for the feedback.

> Subject: Re: [PATCH 4.4.y-cip 00/83] Add RZ/G1C SD/eMMC support
> 
> Hi!
> 
> > > > Yes please, if other maintainers are happy.
> > > >
> > > > Please apply the below patch patch before 33,
> > > > https://patchwork.kernel.org/patch/11232167/
> > >
> > > I applied 1..33. That caused build failure. I added 35, which fixes
> > > the compile problem.
> >
> > Yes. I knew, that is the reason I provided the above link.
> 
> Oops, I was not paying close enough attention. Sorry about that.

Is it possible for you to rearrange the patch?

Ie, patch " mmc: add define for R1 response without CRC" should go before
" mmc: tmio: add eMMC support". Other wise you will get a compilation error
If someone checkout the branch with the commit id of  later patch.

Cheers,
Biju

[cip-dev] [PATCH 4.4.y-cip 00/83] Add RZ/G1C SD/eMMC support

[Pavel Machek]

Hi!

> > > > > Yes please, if other maintainers are happy.
> > > > >
> > > > > Please apply the below patch patch before 33,
> > > > > https://patchwork.kernel.org/patch/11232167/
> > > >
> > > > I applied 1..33. That caused build failure. I added 35, which fixes
> > > > the compile problem.
> > >
> > > Yes. I knew, that is the reason I provided the above link.
> > 
> > Oops, I was not paying close enough attention. Sorry about that.
> 
> Is it possible for you to rearrange the patch?

> Ie, patch " mmc: add define for R1 response without CRC" should go before
> " mmc: tmio: add eMMC support". Other wise you will get a compilation error
> If someone checkout the branch with the commit id of  later patch.

It is possible, but it would require me to rebase and then force push,
causing problems for people who pulled the tree in the meantime. I
believe risks outweight the advantages at this point.

Best regards,
								Pavel
-- 
DENX Software Engineering GmbH,      Managing Director: Wolfgang Denk
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
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[cip-dev] [PATCH 4.4.y-cip 36/83] mmc: sh_mobile_sdhi: add ocr_mask option

[Biju Das]

Hi Pavel,

Thanks for the feedback.

> Subject: Re: [PATCH 4.4.y-cip 36/83] mmc: sh_mobile_sdhi: add ocr_mask
> option
> 
> Hi!
> 
> > commit f19417f38264f9a2f7b4627aa4060133c237b211 upstream.
> >
> > In moving platforms from board files to DT, there still needs to be a
> > way to set the ocr_mask setting for the tmio driver during probe.
> > Without this setting, the probe will fail because the supported voltages are
> not known.
> >
> > This patch will also traditional platform registration platforms to
> > migrate to DT.
> 
> This is not quite english.
> 
> > +++ b/drivers/mmc/host/sh_mobile_sdhi.c
> > @@ -49,6 +49,7 @@
> >
> >  struct sh_mobile_sdhi_of_data {
> >  	unsigned long tmio_flags;
> > +	u32	      tmio_ocr_mask;
> >  	unsigned long capabilities;
> >  	unsigned long capabilities2;
> >  	enum dma_slave_buswidth dma_buswidth; @@ -370,6 +371,7 @@
> static int
> > sh_mobile_sdhi_probe(struct platform_device *pdev)
> >  		const struct sh_mobile_sdhi_of_data *of_data = of_id-
> >data;
> >
> >  		mmc_data->flags |= of_data->tmio_flags;
> > +		mmc_data->ocr_mask = of_data->tmio_ocr_mask;
> >  		mmc_data->capabilities |= of_data->capabilities;
> >  		mmc_data->capabilities2 |= of_data->capabilities2;
> >  		mmc_data->dma_rx_offset = of_data->dma_rx_offset;
> 
> And as of_data->tmio_ocr_mask is never written, I don't see how this can fix
> the problem effect.

This patch fixes the problem on RZ/A boards.
https://cregit.linuxsources.org/code/4.11/drivers/mmc/host/sh_mobile_sdhi.c.html

regards,
Biju