[PATCH v5 00/18] Add support for FDMA DMA controller and slim core rproc found on STi chipsets

[PATCH v5 00/18] Add support for FDMA DMA controller and slim core rproc found on STi chipsets

[Peter Griffin]

Hi Vinod, Bjorn, Maxime, Patrice,

This patchset adds support for the Flexible Direct Memory Access (FDMA) core
found on STi chipsets from STMicroelectronics. The FDMA is a slim core CPU
with a dedicated firmware. It is a general purpose DMA controller supporting
16 independent channels and data can be moved from memory to memory or between
memory and paced latency critical real time targets.

After some discussion with the DT maintainers I've removed the firmware
name from DT, and now generate the name based on the compatible string.
This is in keeping with how most other kernel drivers request firmware, and avoids
a new DT firmware name or fdma id binding.

I've also dropped the dma xbar support for the moment, as I believe it should be
re-worked based on some of the xbar API's that TI recently added. As requested
I've also split it into smaller patches to help with a faster review.

V3 also included some updates to the ASoC st,sti-asoc-card.txt DT documentation
to make the doc align with the driver code. This is kept as part of this series
for completeness and so any further changes to the ASoC dt nodes in this series
move in lockstep with the documentation. However these is no strict dependency
on this update with the rest of the series. It also includes DT patches for
Maximes/ Patrices STi DT tree to enable ASoC on STiH407/10 based platforms using
the fdma driver.

v4 includes a new slim core rproc driver for loading the slim elf firmware. This
enables us to use the generic rproc elf loading code. This has deliberately not
been implemented as a platform_driver, to avoid having to have double mappings of
I/O memory from two device drivers, and also to ensure that the DT node reflects
the actual hardware rather than Linux subsystems. The slim core is the basis
for various pieces of IP in STi chipsets and the intention is that other drivers
(e.g. demux) can also be migrated over to using the slim rproc for their
elf firmware loading and start/stop control.

v5 includes various updates from Bjorn related to the slim rproc implementation.
It also includes a patch to make rsc_table optional in remoteproc_core and various
other cleanups and review feedback from Vinod to do with the actual fdma
implementation. It also fixes a regression introduced in v4 when all drivers are
built-in spotted by Aranud.

regards,

Peter.

Changes since v4:
 - Make rsc table optional in remoteproc (Peter)
 - Various fixups to STi audio DT nodes (Arnaud)
 - Bulk rename of xp70 to slim (Peter)
 - Update my email to @linaro.org (Lee)
 - rebase on v4.7-rc2 (Peter)
 - Don't make ST_SLIM_REMOTEPROC user selectable (Bjorn)
 - -EPROBE_DEFER if rproc_boot fails when allocating DMA channel (Arnaud / Peter)
 - Drop some unnecessary headers (Vinod / Bjorn)
 - Change to writel now we have several mappings (Bjorn)
 - Remove io_res, rproc, and some unused structure fields / #define (Bjorn)
 - put clks in error path, also put clks before rproc_put() (Bjorn)
 - Make enum less generic (Bjorn)
 - Make slim_rproc_alloc() return a st_slim_rproc reference (Bjorn)
 - Alphabetical naming in Kconfig & Makefile (Vinod)
 - Add FDMA prefix to REQ_CTRL* (Vinod)
 - Print ret on some error paths (Vinod)
 - Add some acked-by (Peter)

Changes since v3:
 - Remove elf loading code from fdma driver (Vinod)
 - Remove fdma_ prefix for clock names (Arnd)
 - Make _xlate use dma_get_any_channel rather than request_channel (Arnd)
 - Make a common function for _prep_ routines (Vinod)
 - Make driver depend on COMPILE_TEST (Arnd)
 - Remove unnecessary st_fdma_filter_fn (Arnd)
 - Enable FDMA as a module (Arnd)
 - Drop fdma_ clock prefix (Arnd)
 - Fix description as well as example for st, prefix (Arnd)
 - Remove string concatenation from fdma register macros to ease grep'ability (Arnd)
 - Add a XP70 rproc driver for ELF firmware loading and start/stop control (Peter)
 - Add myself as a author of the driver (Peter)

Changes since v2:
 - Change to dma-controller (Arnd)
 - Remove platform data header file and simplifiy code (Arnd)
 - Remove FW_LOADER_USER_HELPER_FALLBACK and rework firmware loading to device config (Vinod)
 - Use SET_RUNTIME_PM_OPS helpers (Vinod)
 - Remove fdma-id dt prop and use compatibles to generate different fdma firmware names (Arnd / Lee)
 - Add sti-asoc-card DT nodes and pinmux config for uniperif player & reader (Peter)
 - Update sti-asoc-card DT binding documentation (Peter)
 - Enable STi audio drivers in multi_v7_defconfig (Peter)

Changes since v1:
 - split into smaller patches for easier / faster review (Vinod)
 - new fill_hw_mode() with common code (Vinod)
 - new config_reqctrl() called from *_prep() instead of device_config cb (Vinod)
 - fdma-xbar support removed (Peter)
 - rework firmware name mechanism so fwname isn't in DT (Peter / Lee)
 - st_fdma_seg_to_mem can be static (Paul)
 - EXPORT_SYMBOL st_fdma_filter_fn not required (Paul)
 - s/channel/channels (vinod)
 - better describe "Must be <3>" (vinod)
 - sizeof(*ehdr) (vinod)
 - print values on error debug (vinod)
 - empty line (Vinod)
 - Update to -EIO (Vinod)
 - Make st_fdma tristate (Paul)
 - Remove __exit tag from .remove (Maxime)
 - Update MAINTAINERS rule to fdma* (Lee)
 - Unit address should match reg property (Lee)

Peter Griffin (18):
  remoteproc: make rsc table support optional
  remoteproc: st_slim_rproc: add a slimcore rproc driver
  MAINTAINERS: Add st slim core rproc driver to STi section.
  dmaengine: st_fdma: Add STMicroelectronics FDMA DT binding
    documentation
  dmaengine: st_fdma: Add STMicroelectronics FDMA driver header file
  dmaengine: st_fdma: Add STMicroelectronics FDMA engine driver support
  ARM: STi: DT: STiH407: Add FDMA driver dt nodes.
  MAINTAINERS: Add FDMA driver files to STi section.
  ARM: multi_v7_defconfig: Enable STi FDMA driver
  ASoC: sti: Update DT example to match the driver code
  ARM: multi_v7_defconfig: Enable STi and simple-card drivers.
  ARM: DT: STiH407: Add i2s_out pinctrl configuration
  ARM: DT: STiH407: Add i2s_in pinctrl configuration
  ARM: DT: STiH407: Add spdif_out pinctrl config
  ARM: STi: DT: STiH407: Add sti-sasg-codec dt node
  ARM: STi: DT: STiH407: Add uniperif player dt nodes
  ARM: STi: DT: STiH407: Add uniperif reader dt nodes
  ARM: DT: STi: stihxxx-b2120: Add DT nodes for STi audio card

 Documentation/devicetree/bindings/dma/st_fdma.txt  |  87 ++
 .../devicetree/bindings/sound/st,sti-asoc-card.txt |  20 +-
 MAINTAINERS                                        |   3 +
 arch/arm/boot/dts/stih407-family.dtsi              | 161 ++++
 arch/arm/boot/dts/stih407-pinctrl.dtsi             |  55 ++
 arch/arm/boot/dts/stihxxx-b2120.dtsi               |  45 ++
 arch/arm/configs/multi_v7_defconfig                |   4 +
 drivers/dma/Kconfig                                |  14 +-
 drivers/dma/Makefile                               |   1 +
 drivers/dma/st_fdma.c                              | 880 +++++++++++++++++++++
 drivers/dma/st_fdma.h                              | 244 ++++++
 drivers/remoteproc/Kconfig                         |   8 +
 drivers/remoteproc/Makefile                        |   1 +
 drivers/remoteproc/da8xx_remoteproc.c              |   1 +
 drivers/remoteproc/remoteproc_core.c               |  87 +-
 drivers/remoteproc/st_remoteproc.c                 |   2 +
 drivers/remoteproc/st_slim_rproc.c                 | 338 ++++++++
 drivers/remoteproc/ste_modem_rproc.c               |   2 +
 drivers/remoteproc/wkup_m3_rproc.c                 |   1 +
 include/linux/remoteproc.h                         |   1 +
 include/linux/remoteproc/st_slim_rproc.h           |  53 ++
 21 files changed, 1964 insertions(+), 44 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/dma/st_fdma.txt
 create mode 100644 drivers/dma/st_fdma.c
 create mode 100644 drivers/dma/st_fdma.h
 create mode 100644 drivers/remoteproc/st_slim_rproc.c
 create mode 100644 include/linux/remoteproc/st_slim_rproc.h

-- 
1.9.1

[PATCH v5 01/18] remoteproc: make rsc table support optional

[Peter Griffin]

Some firmware and rproc drivers such as slim core don't have a
resource table. To avoid having to fudge an empty table
in the rproc driver this patch introduces a new has_rsctable
flag. rproc drivers which don't require a rsc table can set
this flag to false, and it avoids doing the initial async
firmware load in rproc_add_virtio_devices() to parse the
rsc table during rproc_add(), and also optimises rproc_fw_boot()
code path to avoid unnecessary rsc table processing of an
empty table.

Signed-off-by: Peter Griffin <peter.griffin@linaro.org>
---
 drivers/remoteproc/da8xx_remoteproc.c |  1 +
 drivers/remoteproc/remoteproc_core.c  | 87 ++++++++++++++++++++++-------------
 drivers/remoteproc/st_remoteproc.c    |  2 +
 drivers/remoteproc/ste_modem_rproc.c  |  2 +
 drivers/remoteproc/wkup_m3_rproc.c    |  1 +
 include/linux/remoteproc.h            |  1 +
 6 files changed, 61 insertions(+), 33 deletions(-)

diff --git a/drivers/remoteproc/da8xx_remoteproc.c b/drivers/remoteproc/da8xx_remoteproc.c
index 009e56f..6e1d9be 100644
--- a/drivers/remoteproc/da8xx_remoteproc.c
+++ b/drivers/remoteproc/da8xx_remoteproc.c
@@ -224,6 +224,7 @@ static int da8xx_rproc_probe(struct platform_device *pdev)
 	drproc = rproc->priv;
 	drproc->rproc = rproc;
 	rproc->has_iommu = false;
+	rproc->has_rsctable = true;
 
 	platform_set_drvdata(pdev, rproc);
 
diff --git a/drivers/remoteproc/remoteproc_core.c b/drivers/remoteproc/remoteproc_core.c
index db3958b..bef85fb 100644
--- a/drivers/remoteproc/remoteproc_core.c
+++ b/drivers/remoteproc/remoteproc_core.c
@@ -716,6 +716,8 @@ static int rproc_handle_resources(struct rproc *rproc, int len,
 	rproc_handle_resource_t handler;
 	int ret = 0, i;
 
+	WARN_ON(!rproc->has_rsctable);
+
 	for (i = 0; i < rproc->table_ptr->num; i++) {
 		int offset = rproc->table_ptr->offset[i];
 		struct fw_rsc_hdr *hdr = (void *)rproc->table_ptr + offset;
@@ -801,7 +803,7 @@ static int rproc_fw_boot(struct rproc *rproc, const struct firmware *fw)
 	struct resource_table *table, *loaded_table;
 	int ret, tablesz;
 
-	if (!rproc->table_ptr)
+	if (!rproc->table_ptr && rproc->has_rsctable)
 		return -ENOMEM;
 
 	ret = rproc_fw_sanity_check(rproc, fw);
@@ -823,24 +825,27 @@ static int rproc_fw_boot(struct rproc *rproc, const struct firmware *fw)
 	rproc->bootaddr = rproc_get_boot_addr(rproc, fw);
 	ret = -EINVAL;
 
-	/* look for the resource table */
-	table = rproc_find_rsc_table(rproc, fw, &tablesz);
-	if (!table) {
-		dev_err(dev, "Failed to find resource table\n");
-		goto clean_up;
-	}
+	if (rproc->has_rsctable) {
+		/* look for the resource table */
+		table = rproc_find_rsc_table(rproc, fw, &tablesz);
+		if (!table) {
+			dev_err(dev, "Failed to find resource table\n");
+			goto clean_up;
+		}
 
-	/* Verify that resource table in loaded fw is unchanged */
-	if (rproc->table_csum != crc32(0, table, tablesz)) {
-		dev_err(dev, "resource checksum failed, fw changed?\n");
-		goto clean_up;
-	}
+		/* Verify that resource table in loaded fw is unchanged */
+		if (rproc->table_csum != crc32(0, table, tablesz)) {
+			dev_err(dev, "resource checksum failed, fw changed?\n");
+			goto clean_up;
+		}
 
-	/* handle fw resources which are required to boot rproc */
-	ret = rproc_handle_resources(rproc, tablesz, rproc_loading_handlers);
-	if (ret) {
-		dev_err(dev, "Failed to process resources: %d\n", ret);
-		goto clean_up;
+		/* handle fw resources which are required to boot rproc */
+		ret = rproc_handle_resources(rproc, tablesz,
+					rproc_loading_handlers);
+		if (ret) {
+			dev_err(dev, "Failed to process resources: %d\n", ret);
+			goto clean_up;
+		}
 	}
 
 	/* load the ELF segments to memory */
@@ -850,16 +855,20 @@ static int rproc_fw_boot(struct rproc *rproc, const struct firmware *fw)
 		goto clean_up;
 	}
 
-	/*
-	 * The starting device has been given the rproc->cached_table as the
-	 * resource table. The address of the vring along with the other
-	 * allocated resources (carveouts etc) is stored in cached_table.
-	 * In order to pass this information to the remote device we must
-	 * copy this information to device memory.
-	 */
-	loaded_table = rproc_find_loaded_rsc_table(rproc, fw);
-	if (loaded_table)
-		memcpy(loaded_table, rproc->cached_table, tablesz);
+	if (rproc->has_rsctable) {
+		/*
+		 * The starting device has been given the rproc->cached_table as
+		 * the resource table. The address of the vring along with the
+		 * other allocated resources (carveouts etc) is stored in
+		 * cached_table. In order to pass this information to the remote
+		 * device we must copy this information to device memory.
+		 */
+
+		loaded_table = rproc_find_loaded_rsc_table(rproc, fw);
+		if (loaded_table)
+			memcpy(loaded_table, rproc->cached_table, tablesz);
+
+	}
 
 	/* power up the remote processor */
 	ret = rproc->ops->start(rproc);
@@ -868,12 +877,14 @@ static int rproc_fw_boot(struct rproc *rproc, const struct firmware *fw)
 		goto clean_up;
 	}
 
+
 	/*
 	 * Update table_ptr so that all subsequent vring allocations and
 	 * virtio fields manipulation update the actual loaded resource table
 	 * in device memory.
 	 */
-	rproc->table_ptr = loaded_table;
+	if (rproc->has_rsctable)
+		rproc->table_ptr = loaded_table;
 
 	rproc->state = RPROC_RUNNING;
 
@@ -978,6 +989,7 @@ static int rproc_add_virtio_devices(struct rproc *rproc)
 int rproc_trigger_recovery(struct rproc *rproc)
 {
 	struct rproc_vdev *rvdev, *rvtmp;
+	int ret;
 
 	dev_err(&rproc->dev, "recovering %s\n", rproc->name);
 
@@ -992,8 +1004,12 @@ int rproc_trigger_recovery(struct rproc *rproc)
 
 	/* Free the copy of the resource table */
 	kfree(rproc->cached_table);
+	rproc->cached_table = NULL;
 
-	return rproc_add_virtio_devices(rproc);
+	if (rproc->has_rsctable)
+		ret = rproc_add_virtio_devices(rproc);
+
+	return ret;
 }
 
 /**
@@ -1088,7 +1104,7 @@ static int __rproc_boot(struct rproc *rproc, bool wait)
 	}
 
 	/* if rproc virtio is not yet configured, wait */
-	if (wait)
+	if (wait && rproc->has_rsctable)
 		wait_for_completion(&rproc->firmware_loading_complete);
 
 	ret = rproc_fw_boot(rproc, firmware_p);
@@ -1169,12 +1185,14 @@ void rproc_shutdown(struct rproc *rproc)
 	}
 
 	/* clean up all acquired resources */
-	rproc_resource_cleanup(rproc);
+	if (rproc->has_rsctable)
+		rproc_resource_cleanup(rproc);
 
 	rproc_disable_iommu(rproc);
 
 	/* Give the next start a clean resource table */
-	rproc->table_ptr = rproc->cached_table;
+	if (rproc->has_rsctable)
+		rproc->table_ptr = rproc->cached_table;
 
 	/* if in crash state, unlock crash handler */
 	if (rproc->state == RPROC_CRASHED)
@@ -1277,7 +1295,10 @@ int rproc_add(struct rproc *rproc)
 	/* create debugfs entries */
 	rproc_create_debug_dir(rproc);
 
-	return rproc_add_virtio_devices(rproc);
+	if (rproc->has_rsctable)
+		ret = rproc_add_virtio_devices(rproc);
+
+	return ret;
 }
 EXPORT_SYMBOL(rproc_add);
 
diff --git a/drivers/remoteproc/st_remoteproc.c b/drivers/remoteproc/st_remoteproc.c
index 6f056ca..2aaf0f8 100644
--- a/drivers/remoteproc/st_remoteproc.c
+++ b/drivers/remoteproc/st_remoteproc.c
@@ -235,6 +235,8 @@ static int st_rproc_probe(struct platform_device *pdev)
 		return -ENOMEM;
 
 	rproc->has_iommu = false;
+	rproc->has_rsctable = true;
+
 	ddata = rproc->priv;
 	ddata->config = (struct st_rproc_config *)match->data;
 
diff --git a/drivers/remoteproc/ste_modem_rproc.c b/drivers/remoteproc/ste_modem_rproc.c
index 53dc17b..0256dff 100644
--- a/drivers/remoteproc/ste_modem_rproc.c
+++ b/drivers/remoteproc/ste_modem_rproc.c
@@ -290,6 +290,8 @@ static int sproc_probe(struct platform_device *pdev)
 	sproc->mdev = mdev;
 	sproc->rproc = rproc;
 	rproc->has_iommu = false;
+	rproc->has_rsctable = true;
+
 	mdev->drv_data = sproc;
 
 	/* Provide callback functions to modem device */
diff --git a/drivers/remoteproc/wkup_m3_rproc.c b/drivers/remoteproc/wkup_m3_rproc.c
index 02d271d..27e808a 100644
--- a/drivers/remoteproc/wkup_m3_rproc.c
+++ b/drivers/remoteproc/wkup_m3_rproc.c
@@ -170,6 +170,7 @@ static int wkup_m3_rproc_probe(struct platform_device *pdev)
 	wkupm3 = rproc->priv;
 	wkupm3->rproc = rproc;
 	wkupm3->pdev = pdev;
+	rproc->has_rsctable = true;
 
 	for (i = 0; i < ARRAY_SIZE(mem_names); i++) {
 		res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
diff --git a/include/linux/remoteproc.h b/include/linux/remoteproc.h
index 1c457a8..cfa180d 100644
--- a/include/linux/remoteproc.h
+++ b/include/linux/remoteproc.h
@@ -443,6 +443,7 @@ struct rproc {
 	struct resource_table *cached_table;
 	u32 table_csum;
 	bool has_iommu;
+	bool has_rsctable;
 };
 
 /* we currently support only two vrings per rvdev */
-- 
1.9.1

[PATCH v5 02/18] remoteproc: st_slim_rproc: add a slimcore rproc driver

[Peter Griffin]

slim core is used as a basis for many IPs in the STi
chipsets such as fdma and demux. To avoid duplicating
the elf loading code in each device driver a slim
rproc driver has been created.

This driver is designed to be used by other device drivers
such as fdma, or demux whose IP is based around a slim core.
The device driver can call slim_rproc_alloc() to allocate
a slim rproc and slim_rproc_put() when finished.

This driver takes care of ioremapping the slim
registers (dmem, imem, slimcore, peripherals), whose offsets
and sizes can change between IP's. It also obtains and enables
any clocks used by the device. This approach avoids having
a double mapping of the registers as slim_rproc does not register
its own platform device. It also maps well to device tree
abstraction as it allows us to have one dt node for the whole
device.

All of the generic rproc elf loading code can be reused, and
we provide start() stop() hooks to start and stop the slim
core once the firmware has been loaded. This has been tested
successfully with fdma driver.

Signed-off-by: Peter Griffin <peter.griffin@linaro.org>
---
 drivers/remoteproc/Kconfig               |   8 +
 drivers/remoteproc/Makefile              |   1 +
 drivers/remoteproc/st_slim_rproc.c       | 338 +++++++++++++++++++++++++++++++
 include/linux/remoteproc/st_slim_rproc.h |  53 +++++
 4 files changed, 400 insertions(+)
 create mode 100644 drivers/remoteproc/st_slim_rproc.c
 create mode 100644 include/linux/remoteproc/st_slim_rproc.h

diff --git a/drivers/remoteproc/Kconfig b/drivers/remoteproc/Kconfig
index 72e97d7..9bb13b6 100644
--- a/drivers/remoteproc/Kconfig
+++ b/drivers/remoteproc/Kconfig
@@ -86,4 +86,12 @@ config ST_REMOTEPROC
 	  processor framework.
 	  This can be either built-in or a loadable module.
 
+config ST_SLIM_REMOTEPROC
+	tristate "ST Slim remoteproc support"
+	select REMOTEPROC
+	help
+	  Say y here to support firmware loading on IP based around
+	  the Slim core.
+	  If unsure say N.
+
 endmenu
diff --git a/drivers/remoteproc/Makefile b/drivers/remoteproc/Makefile
index 279cb2e..37bb39a 100644
--- a/drivers/remoteproc/Makefile
+++ b/drivers/remoteproc/Makefile
@@ -12,3 +12,4 @@ obj-$(CONFIG_STE_MODEM_RPROC)	 	+= ste_modem_rproc.o
 obj-$(CONFIG_WKUP_M3_RPROC)		+= wkup_m3_rproc.o
 obj-$(CONFIG_DA8XX_REMOTEPROC)		+= da8xx_remoteproc.o
 obj-$(CONFIG_ST_REMOTEPROC)		+= st_remoteproc.o
+obj-$(CONFIG_ST_SLIM_REMOTEPROC)	+= st_slim_rproc.o
diff --git a/drivers/remoteproc/st_slim_rproc.c b/drivers/remoteproc/st_slim_rproc.c
new file mode 100644
index 0000000..934f490
--- /dev/null
+++ b/drivers/remoteproc/st_slim_rproc.c
@@ -0,0 +1,338 @@
+/*
+ * st_slim_rproc.c
+ *
+ * Copyright (C) 2016 STMicroelectronics
+ * Author: Peter Griffin <peter.griffin@linaro.org>
+ * License terms:  GNU General Public License (GPL), version 2
+ */
+
+#include <linux/clk.h>
+#include <linux/err.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>
+#include <linux/remoteproc.h>
+#include <linux/remoteproc/st_slim_rproc.h>
+#include "remoteproc_internal.h"
+
+/* slimcore registers */
+#define SLIM_ID_OFST		0x0
+#define SLIM_VER_OFST		0x4
+
+#define SLIM_EN_OFST		0x8
+#define SLIM_EN_RUN			BIT(0)
+
+#define SLIM_CLK_GATE_OFST	0xC
+#define SLIM_CLK_GATE_DIS		BIT(0)
+#define SLIM_CLK_GATE_RESET		BIT(2)
+
+#define SLIM_SLIM_PC_OFST	0x20
+
+/* dmem registers */
+#define SLIM_REV_ID_OFST	0x0
+#define SLIM_REV_ID_MIN_MASK		GENMASK(15, 8)
+#define SLIM_REV_ID_MIN(id)		((id & SLIM_REV_ID_MIN_MASK) >> 8)
+#define SLIM_REV_ID_MAJ_MASK		GENMASK(23, 16)
+#define SLIM_REV_ID_MAJ(id)		((id & SLIM_REV_ID_MAJ_MASK) >> 16)
+
+
+/* peripherals registers */
+#define SLIM_STBUS_SYNC_OFST	0xF88
+#define SLIM_STBUS_SYNC_DIS		BIT(0)
+
+#define SLIM_INT_SET_OFST	0xFD4
+#define SLIM_INT_CLR_OFST	0xFD8
+#define SLIM_INT_MASK_OFST	0xFDC
+
+#define SLIM_CMD_CLR_OFST	0xFC8
+#define SLIM_CMD_MASK_OFST	0xFCC
+
+const char *mem_names[SLIM_MEM_MAX] = {
+	[SLIM_DMEM]	= "dmem",
+	[SLIM_IMEM]	= "imem",
+};
+
+static int slim_clk_get(struct st_slim_rproc *slim_rproc, struct device *dev)
+{
+	int clk, err;
+
+	for (clk = 0; clk < SLIM_MAX_CLK; clk++) {
+		slim_rproc->clks[clk] = of_clk_get(dev->of_node, clk);
+		if (IS_ERR(slim_rproc->clks[clk])) {
+			err = PTR_ERR(slim_rproc->clks[clk]);
+			if (err == -EPROBE_DEFER)
+				goto err_put_clks;
+			slim_rproc->clks[clk] = NULL;
+			break;
+		}
+	}
+
+	return 0;
+
+err_put_clks:
+	while (--clk >= 0)
+		clk_put(slim_rproc->clks[clk]);
+
+	return err;
+}
+
+static void slim_clk_disable(struct st_slim_rproc *slim_rproc)
+{
+	int clk;
+
+	for (clk = 0; clk < SLIM_MAX_CLK && slim_rproc->clks[clk]; clk++)
+		clk_disable_unprepare(slim_rproc->clks[clk]);
+}
+
+static int slim_clk_enable(struct st_slim_rproc *slim_rproc)
+{
+	int clk, ret;
+
+	for (clk = 0; clk < SLIM_MAX_CLK && slim_rproc->clks[clk]; clk++) {
+		ret = clk_prepare_enable(slim_rproc->clks[clk]);
+		if (ret)
+			goto err_disable_clks;
+	}
+
+	return 0;
+
+err_disable_clks:
+	while (--clk >= 0)
+		clk_disable_unprepare(slim_rproc->clks[clk]);
+
+	return ret;
+}
+
+/**
+ * Remoteproc slim specific device handlers
+ */
+static int slim_rproc_start(struct rproc *rproc)
+{
+	struct device *dev = &rproc->dev;
+	struct st_slim_rproc *slim_rproc = rproc->priv;
+	unsigned long hw_id, hw_ver, fw_rev;
+	u32 val;
+	int ret;
+
+	ret = slim_clk_enable(slim_rproc);
+	if (ret) {
+		dev_err(dev, "Failed to enable clocks\n");
+		goto err_clk;
+	}
+
+	/* disable CPU pipeline clock & reset cpu pipeline */
+	val = SLIM_CLK_GATE_DIS | SLIM_CLK_GATE_RESET;
+	writel(val, slim_rproc->slimcore + SLIM_CLK_GATE_OFST);
+
+	/* disable SLIM core STBus sync */
+	writel(SLIM_STBUS_SYNC_DIS, slim_rproc->peri + SLIM_STBUS_SYNC_OFST);
+
+	/* enable cpu pipeline clock */
+	writel(!SLIM_CLK_GATE_DIS,
+		slim_rproc->slimcore + SLIM_CLK_GATE_OFST);
+
+	/* clear int & cmd mailbox */
+	writel(~0UL, slim_rproc->peri + SLIM_INT_CLR_OFST);
+	writel(~0UL, slim_rproc->peri + SLIM_CMD_CLR_OFST);
+
+	/* enable all channels cmd & int */
+	writel(~0UL, slim_rproc->peri + SLIM_INT_MASK_OFST);
+	writel(~0UL, slim_rproc->peri + SLIM_CMD_MASK_OFST);
+
+	/* enable cpu */
+	writel(SLIM_EN_RUN, slim_rproc->slimcore + SLIM_EN_OFST);
+
+	hw_id = readl_relaxed(slim_rproc->slimcore + SLIM_ID_OFST);
+	hw_ver = readl_relaxed(slim_rproc->slimcore + SLIM_VER_OFST);
+
+	fw_rev = readl(slim_rproc->mem[SLIM_DMEM].cpu_addr +
+			SLIM_REV_ID_OFST);
+
+	dev_info(dev, "fw rev:%ld.%ld on SLIM %ld.%ld\n",
+		 SLIM_REV_ID_MAJ(fw_rev), SLIM_REV_ID_MIN(fw_rev),
+		 hw_id, hw_ver);
+
+err_clk:
+	return ret;
+}
+
+static int slim_rproc_stop(struct rproc *rproc)
+{
+	struct st_slim_rproc *slim_rproc = rproc->priv;
+	u32 val;
+
+	/* mask all (cmd & int) channels */
+	writel(0UL, slim_rproc->peri + SLIM_INT_MASK_OFST);
+	writel(0UL, slim_rproc->peri + SLIM_CMD_MASK_OFST);
+
+	/* disable cpu pipeline clock */
+	writel(SLIM_CLK_GATE_DIS
+		, slim_rproc->slimcore + SLIM_CLK_GATE_OFST);
+
+	writel(!SLIM_EN_RUN, slim_rproc->slimcore + SLIM_EN_OFST);
+
+	val = readl(slim_rproc->slimcore + SLIM_EN_OFST);
+	if (val & SLIM_EN_RUN)
+		dev_warn(&rproc->dev, "Failed to disable SLIM");
+
+	slim_clk_disable(slim_rproc);
+
+	dev_dbg(&rproc->dev, "slim stopped\n");
+
+	return 0;
+}
+
+static void *slim_rproc_da_to_va(struct rproc *rproc, u64 da, int len)
+{
+	struct st_slim_rproc *slim_rproc = rproc->priv;
+	void *va = NULL;
+	int i;
+
+	for (i = 0; i < SLIM_MEM_MAX; i++) {
+		if (da != slim_rproc->mem[i].bus_addr)
+			continue;
+
+		va = slim_rproc->mem[i].cpu_addr;
+		break;
+	}
+
+	dev_dbg(&rproc->dev, "%s: da = 0x%llx len = 0x%x va = 0x%p\n",
+		__func__, da, len, va);
+
+	return va;
+}
+
+static struct rproc_ops slim_rproc_ops = {
+	.start		= slim_rproc_start,
+	.stop		= slim_rproc_stop,
+	.da_to_va       = slim_rproc_da_to_va,
+};
+
+/**
+ * Firmware handler operations: sanity, boot address, load ...
+ */
+
+/**
+ * slim_rproc_alloc() - allocate and initialise slim rproc
+ * @pdev: Pointer to the platform_device struct
+ * @fw_name: Name of firmware for rproc to use
+ *
+ * Function for allocating and initialising a slim rproc for use by
+ * device drivers whose IP is based around the slim slim core. It
+ * obtains and enables any clocks required by the slim core and also
+ * ioremaps the various IO.
+ *
+ * Returns st_slim_rproc pointer or PTR_ERR() on error.
+ */
+
+struct st_slim_rproc *slim_rproc_alloc(struct platform_device *pdev,
+				char *fw_name)
+{
+	struct device *dev = &pdev->dev;
+	struct st_slim_rproc *slim_rproc;
+	struct device_node *np = dev->of_node;
+	struct rproc *rproc;
+	struct resource *res;
+	int err, i;
+
+	if (WARN_ON(!np || !fw_name))
+		return ERR_PTR(-EINVAL);
+
+	if (!of_device_is_compatible(np, "st,slim-rproc"))
+		return ERR_PTR(-EINVAL);
+
+	rproc = rproc_alloc(dev, np->name, &slim_rproc_ops,
+			fw_name, sizeof(*slim_rproc));
+	if (!rproc)
+		return ERR_PTR(-ENOMEM);
+
+	rproc->has_iommu = false;
+	rproc->has_rsctable = false;
+
+	slim_rproc = rproc->priv;
+	slim_rproc->rproc = rproc;
+
+	/* get imem and dmem */
+	for (i = 0; i < ARRAY_SIZE(mem_names); i++) {
+
+		res = platform_get_resource_byname
+			(pdev, IORESOURCE_MEM, mem_names[i]);
+
+		slim_rproc->mem[i].cpu_addr = devm_ioremap_resource(dev, res);
+		if (IS_ERR(slim_rproc->mem[i].cpu_addr)) {
+			dev_err(&pdev->dev, "devm_ioremap_resource failed\n");
+			err = PTR_ERR(slim_rproc->mem[i].cpu_addr);
+			goto err;
+		}
+		slim_rproc->mem[i].bus_addr = res->start;
+		slim_rproc->mem[i].size = resource_size(res);
+	}
+
+	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "slimcore");
+
+	slim_rproc->slimcore = devm_ioremap_resource(dev, res);
+	if (IS_ERR(slim_rproc->slimcore)) {
+		dev_err(&pdev->dev,
+			"devm_ioremap_resource failed for slimcore\n");
+		err = PTR_ERR(slim_rproc->slimcore);
+		goto err;
+	}
+
+	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "peripherals");
+
+	slim_rproc->peri = devm_ioremap_resource(dev, res);
+	if (IS_ERR(slim_rproc->peri)) {
+		dev_err(&pdev->dev, "devm_ioremap_resource failed for peri\n");
+		err = PTR_ERR(slim_rproc->peri);
+		goto err;
+	}
+
+	err = slim_clk_get(slim_rproc, dev);
+	if (err)
+		goto err;
+
+	/* Register as a remoteproc device */
+	err = rproc_add(rproc);
+	if (err) {
+		dev_err(dev, "registration of slim remoteproc failed\n");
+		goto err_clk;
+	}
+
+	return slim_rproc;
+
+err_clk:
+	for (i = 0; i < SLIM_MAX_CLK && slim_rproc->clks[i]; i++)
+		clk_put(slim_rproc->clks[i]);
+err:
+	rproc_put(rproc);
+	return ERR_PTR(err);
+}
+EXPORT_SYMBOL(slim_rproc_alloc);
+
+/**
+  * slim_rproc_put() - put slim rproc resources
+  * @slim_rproc: Pointer to the st_slim_rproc struct
+  *
+  * Function for calling respective _put() functions on
+  * slim_rproc resources.
+  *
+  */
+void slim_rproc_put(struct st_slim_rproc *slim_rproc)
+{
+	int clk;
+
+	if (!slim_rproc)
+		return;
+
+	for (clk = 0; clk < SLIM_MAX_CLK && slim_rproc->clks[clk]; clk++)
+		clk_put(slim_rproc->clks[clk]);
+
+	rproc_put(slim_rproc->rproc);
+}
+EXPORT_SYMBOL(slim_rproc_put);
+
+MODULE_AUTHOR("Peter Griffin");
+MODULE_DESCRIPTION("STMicroelectronics SLIM rproc driver");
+MODULE_LICENSE("GPL v2");
diff --git a/include/linux/remoteproc/st_slim_rproc.h b/include/linux/remoteproc/st_slim_rproc.h
new file mode 100644
index 0000000..c300b3e
--- /dev/null
+++ b/include/linux/remoteproc/st_slim_rproc.h
@@ -0,0 +1,53 @@
+/*
+ * st_slim_rproc.h
+ *
+ * Copyright (C) 2016 STMicroelectronics
+ * Author: Peter Griffin <peter.griffin@linaro.org>
+ * License terms:  GNU General Public License (GPL), version 2
+ */
+#ifndef _ST_SLIM_H
+#define _ST_SLIM_H
+
+#define SLIM_MEM_MAX 2
+#define SLIM_MAX_CLK 4
+
+enum {
+	SLIM_DMEM,
+	SLIM_IMEM,
+};
+
+/**
+ * struct slim_mem - slim internal memory structure
+ * @cpu_addr: MPU virtual address of the memory region
+ * @bus_addr: Bus address used to access the memory region
+ * @size: Size of the memory region
+ */
+struct slim_mem {
+	void __iomem *cpu_addr;
+	phys_addr_t bus_addr;
+	size_t size;
+};
+
+/**
+ * struct st_slim_rproc - SLIM slim core
+ * @rproc: rproc handle
+ * @mem: slim memory information
+ * @slimcore: slim slimcore regs
+ * @peri: slim peripheral regs
+ * @clks: slim clocks
+ */
+struct st_slim_rproc {
+	struct rproc *rproc;
+	struct slim_mem mem[SLIM_MEM_MAX];
+	void __iomem *slimcore;
+	void __iomem *peri;
+
+	/* st_slim_rproc private */
+	struct clk *clks[SLIM_MAX_CLK];
+};
+
+struct st_slim_rproc *slim_rproc_alloc(struct platform_device *pdev,
+					char *fw_name);
+void slim_rproc_put(struct st_slim_rproc *slim_rproc);
+
+#endif
-- 
1.9.1

[PATCH v5 03/18] MAINTAINERS: Add st slim core rproc driver to STi section.

[Peter Griffin]

This patch adds the slim core rproc driver to the STi section
of the MAINTAINERS file.

Signed-off-by: Peter Griffin <peter.griffin@linaro.org>
---
 MAINTAINERS | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/MAINTAINERS b/MAINTAINERS
index ed42cb6..8f16983 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -1712,6 +1712,7 @@ F:	drivers/phy/phy-stih407-usb.c
 F:	drivers/phy/phy-stih41x-usb.c
 F:	drivers/pinctrl/pinctrl-st.c
 F:	drivers/remoteproc/st_remoteproc.c
+F:	drivers/remoteproc/st_slim_rproc.c
 F:	drivers/reset/sti/
 F:	drivers/rtc/rtc-st-lpc.c
 F:	drivers/tty/serial/st-asc.c
@@ -1720,6 +1721,7 @@ F:	drivers/usb/host/ehci-st.c
 F:	drivers/usb/host/ohci-st.c
 F:	drivers/watchdog/st_lpc_wdt.c
 F:	drivers/ata/ahci_st.c
+F:	include/linux/remoteproc/st_slim_rproc.h
 
 ARM/STM32 ARCHITECTURE
 M:	Maxime Coquelin <mcoquelin.stm32@gmail.com>
-- 
1.9.1

[PATCH v5 04/18] dmaengine: st_fdma: Add STMicroelectronics FDMA DT binding documentation

[Peter Griffin]

This patch adds the DT binding documentation for the FDMA constroller
found on STi based chipsets from STMicroelectronics.

Signed-off-by: Ludovic Barre <ludovic.barre@st.com>
Signed-off-by: Peter Griffin <peter.griffin@linaro.org>
Acked-by: Rob Herring <robh@kernel.org>
---
 Documentation/devicetree/bindings/dma/st_fdma.txt | 87 +++++++++++++++++++++++
 1 file changed, 87 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/dma/st_fdma.txt

diff --git a/Documentation/devicetree/bindings/dma/st_fdma.txt b/Documentation/devicetree/bindings/dma/st_fdma.txt
new file mode 100644
index 0000000..495d853
--- /dev/null
+++ b/Documentation/devicetree/bindings/dma/st_fdma.txt
@@ -0,0 +1,87 @@
+* STMicroelectronics Flexible Direct Memory Access Device Tree bindings
+
+The FDMA is a general-purpose direct memory access controller capable of
+supporting 16 independent DMA channels. It accepts up to 32 DMA requests.
+The FDMA is based on a Slim processor which requires a firmware.
+
+* FDMA Controller
+
+Required properties:
+- compatible	: Should be one of
+		 - st,stih407-fdma-mpe31-11, "st,slim-rproc";
+		 - st,stih407-fdma-mpe31-12, "st,slim-rproc";
+		 - st,stih407-fdma-mpe31-13, "st,slim-rproc";
+- reg		: Should contain an entry for each name in reg-names
+- reg-names	: Must contain "slimcore", "dmem", "peripherals", "imem" entries
+- interrupts	: Should contain one interrupt shared by all channels
+- dma-channels	: Number of channels supported by the controller
+- #dma-cells	: Must be <3>. See DMA client section below
+- clocks	: Must contain an entry for each clock
+See: Documentation/devicetree/bindings/clock/clock-bindings.txt
+
+
+Example:
+
+	fdma0: dma-controller@8e20000 {
+		compatible = "st,stih407-fdma-mpe31-11", "st,slim-rproc";
+		reg = <0x8e20000 0x8000>,
+		      <0x8e30000 0x3000>,
+		      <0x8e37000 0x1000>,
+		      <0x8e38000 0x8000>;
+		reg-names = "slimcore", "dmem", "peripherals", "imem";
+		clocks = <&clk_s_c0_flexgen CLK_FDMA>,
+			 <&clk_s_c0_flexgen CLK_EXT2F_A9>,
+			 <&clk_s_c0_flexgen CLK_EXT2F_A9>,
+			 <&clk_s_c0_flexgen CLK_EXT2F_A9>;
+		interrupts = <GIC_SPI 5 IRQ_TYPE_NONE>;
+		dma-channels = <16>;
+		#dma-cells = <3>;
+	};
+
+* DMA client
+
+Required properties:
+- dmas: Comma separated list of dma channel requests
+- dma-names: Names of the aforementioned requested channels
+
+Each dmas request consists of 4 cells:
+1. A phandle pointing to the FDMA controller
+2. The request line number
+3. A 32bit mask specifying (see include/linux/platform_data/dma-st-fdma.h)
+ -bit 2-0: Holdoff value, dreq will be masked for
+	0x0: 0-0.5us
+	0x1: 0.5-1us
+	0x2: 1-1.5us
+ -bit 17: data swap
+	0x0: disabled
+	0x1: enabled
+ -bit 21: Increment Address
+	0x0: no address increment between transfers
+	0x1: increment address between transfers
+ -bit 22: 2 STBus Initiator Coprocessor interface
+	0x0: high priority port
+	0x1: low priority port
+4. transfers type
+ 0 free running
+ 1 paced
+
+Example:
+
+	sti_uni_player2: sti-uni-player@2 {
+		compatible = "st,sti-uni-player";
+		status = "disabled";
+		#sound-dai-cells = <0>;
+		st,syscfg = <&syscfg_core>;
+		clocks = <&clk_s_d0_flexgen CLK_PCM_2>;
+		assigned-clocks = <&clk_s_d0_flexgen CLK_PCM_2>;
+		assigned-clock-parents = <&clk_s_d0_quadfs 2>;
+		assigned-clock-rates = <50000000>;
+		reg = <0x8D82000 0x158>;
+		interrupts = <GIC_SPI 86 IRQ_TYPE_NONE>;
+		dmas = <&fdma0 4 0 1>;
+		dai-name = "Uni Player #1 (DAC)";
+		dma-names = "tx";
+		st,uniperiph-id = <2>;
+		st,version = <5>;
+		st,mode = "PCM";
+	};
-- 
1.9.1

[PATCH v5 05/18] dmaengine: st_fdma: Add STMicroelectronics FDMA driver header file

[Peter Griffin]

This header file will also be used by the dma xbar driver in the
future.

Signed-off-by: Ludovic Barre <ludovic.barre@st.com>
Signed-off-by: Peter Griffin <peter.griffin@linaro.org>
---
 drivers/dma/st_fdma.h | 244 ++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 244 insertions(+)
 create mode 100644 drivers/dma/st_fdma.h

diff --git a/drivers/dma/st_fdma.h b/drivers/dma/st_fdma.h
new file mode 100644
index 0000000..3eabf0f
--- /dev/null
+++ b/drivers/dma/st_fdma.h
@@ -0,0 +1,244 @@
+/*
+ * st_fdma.h
+ *
+ * Copyright (C) 2014 STMicroelectronics
+ * Author: Ludovic Barre <Ludovic.barre@st.com>
+ * License terms:  GNU General Public License (GPL), version 2
+ */
+#ifndef __DMA_ST_FDMA_H
+#define __DMA_ST_FDMA_H
+
+#include <linux/dmaengine.h>
+#include <linux/dmapool.h>
+#include <linux/io.h>
+#include <linux/remoteproc/st_slim_rproc.h>
+#include "virt-dma.h"
+
+#define ST_FDMA_NR_DREQS 32
+
+#define FW_NAME_SIZE 30
+
+/**
+ * struct st_fdma_generic_node - Free running/paced generic node
+ *
+ * @length: Length in bytes of a line in a 2D mem to mem
+ * @sstride: Stride, in bytes, between source lines in a 2D data move
+ * @dstride: Stride, in bytes, between destination lines in a 2D data move
+ */
+struct st_fdma_generic_node {
+	u32 length;
+	u32 sstride;
+	u32 dstride;
+};
+
+/**
+ * struct st_fdma_hw_node - Node structure used by fdma hw
+ *
+ * @next: Pointer to next node
+ * @control: Transfer Control Parameters
+ * @nbytes: Number of Bytes to read
+ * @saddr: Source address
+ * @daddr: Destination address
+ *
+ * @generic: generic node for free running/paced transfert type
+ * 2 others transfert type are possible, but not yet implemented
+ *
+ * The NODE structures must be aligned to a 32 byte boundary
+ */
+struct st_fdma_hw_node {
+	u32 next;
+	u32 control;
+	u32 nbytes;
+	u32 saddr;
+	u32 daddr;
+	union {
+		struct st_fdma_generic_node generic;
+	};
+} __aligned(32);
+
+/*
+ * node control parameters
+ */
+#define FDMA_NODE_CTRL_REQ_MAP_MASK	GENMASK(4, 0)
+#define FDMA_NODE_CTRL_REQ_MAP_FREE_RUN	0x0
+#define FDMA_NODE_CTRL_REQ_MAP_DREQ(n)	((n) &FDMA_NODE_CTRL_REQ_MAP_MASK)
+#define FDMA_NODE_CTRL_REQ_MAP_EXT		FDMA_NODE_CTRL_REQ_MAP_MASK
+#define FDMA_NODE_CTRL_SRC_MASK		GENMASK(6, 5)
+#define FDMA_NODE_CTRL_SRC_STATIC	BIT(5)
+#define FDMA_NODE_CTRL_SRC_INCR		BIT(6)
+#define FDMA_NODE_CTRL_DST_MASK		GENMASK(8, 7)
+#define FDMA_NODE_CTRL_DST_STATIC	BIT(7)
+#define FDMA_NODE_CTRL_DST_INCR		BIT(8)
+#define FDMA_NODE_CTRL_SECURE		BIT(15)
+#define FDMA_NODE_CTRL_PAUSE_EON	BIT(30)
+#define FDMA_NODE_CTRL_INT_EON		BIT(31)
+
+/**
+ * struct st_fdma_sw_node - descriptor structure for link list
+ *
+ * @pdesc: Physical address of desc
+ * @node: link used for putting this into a channel queue
+ */
+struct st_fdma_sw_node {
+	dma_addr_t pdesc;
+	struct st_fdma_hw_node *desc;
+};
+
+#define NAME_SZ 10
+
+struct st_fdma_driverdata {
+	u32 id;
+	char name[NAME_SZ];
+};
+
+struct st_fdma_desc {
+	struct virt_dma_desc vdesc;
+	struct st_fdma_chan *fchan;
+	bool iscyclic;
+	unsigned int n_nodes;
+	struct st_fdma_sw_node node[];
+};
+
+enum st_fdma_type {
+	ST_FDMA_TYPE_FREE_RUN,
+	ST_FDMA_TYPE_PACED,
+};
+
+struct st_fdma_cfg {
+	struct device_node *of_node;
+	enum st_fdma_type type;
+	dma_addr_t dev_addr;
+	enum dma_transfer_direction dir;
+	int req_line; /* request line */
+	long req_ctrl; /* Request control */
+};
+
+struct st_fdma_chan {
+	struct st_fdma_dev *fdev;
+	struct dma_pool *node_pool;
+	struct dma_slave_config scfg;
+	struct st_fdma_cfg cfg;
+
+	int dreq_line;
+
+	struct virt_dma_chan vchan;
+	struct st_fdma_desc *fdesc;
+	enum dma_status	status;
+};
+
+struct st_fdma_dev {
+	struct device *dev;
+	const struct st_fdma_driverdata *drvdata;
+	struct dma_device dma_device;
+
+	struct st_slim_rproc *slim_rproc;
+
+	int irq;
+
+	struct st_fdma_chan *chans;
+
+	spinlock_t dreq_lock;
+	unsigned long dreq_mask;
+
+	u32 nr_channels;
+	char fw_name[FW_NAME_SIZE];
+};
+
+/* Peripheral Registers*/
+
+#define FDMA_CMD_STA_OFST	0xFC0
+#define FDMA_CMD_SET_OFST	0xFC4
+#define FDMA_CMD_CLR_OFST	0xFC8
+#define FDMA_CMD_MASK_OFST	0xFCC
+#define FDMA_CMD_START(ch)		(0x1 << (ch << 1))
+#define FDMA_CMD_PAUSE(ch)		(0x2 << (ch << 1))
+#define FDMA_CMD_FLUSH(ch)		(0x3 << (ch << 1))
+
+#define FDMA_INT_STA_OFST	0xFD0
+#define FDMA_INT_STA_CH			0x1
+#define FDMA_INT_STA_ERR		0x2
+
+#define FDMA_INT_SET_OFST	0xFD4
+#define FDMA_INT_CLR_OFST	0xFD8
+#define FDMA_INT_MASK_OFST	0xFDC
+
+#define fdma_read(fdev, name) \
+	readl((fdev)->slim_rproc->peri + name)
+
+#define fdma_write(fdev, val, name) \
+	writel((val), (fdev)->slim_rproc->peri + name)
+
+/* fchan interface (dmem) */
+#define FDMA_CH_CMD_OFST	0x200
+#define FDMA_CH_CMD_STA_MASK		GENMASK(1, 0)
+#define FDMA_CH_CMD_STA_IDLE		(0x0)
+#define FDMA_CH_CMD_STA_START		(0x1)
+#define FDMA_CH_CMD_STA_RUNNING		(0x2)
+#define FDMA_CH_CMD_STA_PAUSED		(0x3)
+#define FDMA_CH_CMD_ERR_MASK		GENMASK(4, 2)
+#define FDMA_CH_CMD_ERR_INT		(0x0 << 2)
+#define FDMA_CH_CMD_ERR_NAND		(0x1 << 2)
+#define FDMA_CH_CMD_ERR_MCHI		(0x2 << 2)
+#define FDMA_CH_CMD_DATA_MASK		GENMASK(31, 5)
+#define fchan_read(fchan, name) \
+	readl((fchan)->fdev->slim_rproc->mem[SLIM_DMEM].cpu_addr \
+			+ (fchan)->vchan.chan.chan_id * 0x4 \
+			+ name)
+
+#define fchan_write(fchan, val, name) \
+	writel((val), (fchan)->fdev->slim_rproc->mem[SLIM_DMEM].cpu_addr \
+			+ (fchan)->vchan.chan.chan_id * 0x4 \
+			+ name)
+
+/* req interface */
+#define FDMA_REQ_CTRL_OFST	0x240
+#define dreq_write(fchan, val, name) \
+	writel((val), (fchan)->fdev->slim_rproc->mem[SLIM_DMEM].cpu_addr \
+			+ fchan->dreq_line * 0x04 \
+			+ name)
+/* node interface */
+#define FDMA_NODE_SZ 128
+#define FDMA_PTRN_OFST		0x800
+#define FDMA_CNTN_OFST		0x808
+#define FDMA_SADDRN_OFST	0x80c
+#define FDMA_DADDRN_OFST	0x810
+#define fnode_read(fchan, name) \
+	readl((fchan)->fdev->slim_rproc->mem[SLIM_DMEM].cpu_addr \
+			+ (fchan)->vchan.chan.chan_id * FDMA_NODE_SZ \
+			+ name)
+
+#define fnode_write(fchan, val, name) \
+	writel((val), (fchan)->fdev->slim_rproc->mem[SLIM_DMEM].cpu_addr \
+			+ (fchan)->vchan.chan.chan_id * FDMA_NODE_SZ \
+			+ name)
+
+/*
+ * request control bits
+ */
+#define FDMA_REQ_CTRL_NUM_OPS_MASK	GENMASK(31, 24)
+#define FDMA_REQ_CTRL_NUM_OPS(n)	(FDMA_REQ_CTRL_NUM_OPS_MASK & \
+					((n) << 24))
+#define FDMA_REQ_CTRL_INITIATOR_MASK	BIT(22)
+#define FDMA_REQ_CTRL_INIT0		(0x0 << 22)
+#define FDMA_REQ_CTRL_INIT1		(0x1 << 22)
+#define FDMA_REQ_CTRL_INC_ADDR_ON	BIT(21)
+#define FDMA_REQ_CTRL_DATA_SWAP_ON	BIT(17)
+#define FDMA_REQ_CTRL_WNR		BIT(14)
+#define FDMA_REQ_CTRL_OPCODE_MASK	GENMASK(7, 4)
+#define FDMA_REQ_CTRL_OPCODE_LD_ST1	(0x0 << 4)
+#define FDMA_REQ_CTRL_OPCODE_LD_ST2	(0x1 << 4)
+#define FDMA_REQ_CTRL_OPCODE_LD_ST4	(0x2 << 4)
+#define FDMA_REQ_CTRL_OPCODE_LD_ST8	(0x3 << 4)
+#define FDMA_REQ_CTRL_OPCODE_LD_ST16	(0x4 << 4)
+#define FDMA_REQ_CTRL_OPCODE_LD_ST32	(0x5 << 4)
+#define FDMA_REQ_CTRL_OPCODE_LD_ST64	(0x6 << 4)
+#define FDMA_REQ_CTRL_HOLDOFF_MASK	GENMASK(2, 0)
+#define FDMA_REQ_CTRL_HOLDOFF(n)	((n) & FDMA_REQ_CTRL_HOLDOFF_MASK)
+
+/* bits used by client to configure request control */
+#define FDMA_REQ_CTRL_CFG_MASK (FDMA_REQ_CTRL_HOLDOFF_MASK | \
+				FDMA_REQ_CTRL_DATA_SWAP_ON | \
+				FDMA_REQ_CTRL_INC_ADDR_ON | \
+				FDMA_REQ_CTRL_INITIATOR_MASK)
+
+#endif	/* __DMA_ST_FDMA_H */
-- 
1.9.1

[PATCH v5 06/18] dmaengine: st_fdma: Add STMicroelectronics FDMA engine driver support

[Peter Griffin]

This patch adds support for the Flexible Direct Memory Access (FDMA) core
driver. The FDMA is a slim core CPU with a dedicated firmware.
It is a general purpose DMA controller capable of supporting 16
independent DMA channels. Data moves maybe from memory to memory
or between memory and paced latency critical real time targets and it
is found on al STi based chipsets.

Signed-off-by: Ludovic Barre <ludovic.barre@st.com>
Signed-off-by: Peter Griffin <peter.griffin@linaro.org>
---
 drivers/dma/Kconfig   |  14 +-
 drivers/dma/Makefile  |   1 +
 drivers/dma/st_fdma.c | 880 ++++++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 894 insertions(+), 1 deletion(-)
 create mode 100644 drivers/dma/st_fdma.c

diff --git a/drivers/dma/Kconfig b/drivers/dma/Kconfig
index 8c98779..b479330 100644
--- a/drivers/dma/Kconfig
+++ b/drivers/dma/Kconfig
@@ -423,6 +423,19 @@ config STE_DMA40
 	help
 	  Support for ST-Ericsson DMA40 controller
 
+config ST_FDMA
+	tristate "ST FDMA dmaengine support"
+	depends on ARCH_STI
+	select DMA_ENGINE
+	select DMA_VIRTUAL_CHANNELS
+	select ST_SLIM_REMOTEPROC
+	help
+	  Enable support for ST FDMA controller.
+	  It supports 16 independent DMA channels, accepts up to 32 DMA requests
+
+	  Say Y here if you have such a chipset.
+	  If unsure, say N.
+
 config STM32_DMA
 	bool "STMicroelectronics STM32 DMA support"
 	depends on ARCH_STM32
@@ -541,7 +554,6 @@ config ZX_DMA
 	help
 	  Support the DMA engine for ZTE ZX296702 platform devices.
 
-
 # driver files
 source "drivers/dma/bestcomm/Kconfig"
 
diff --git a/drivers/dma/Makefile b/drivers/dma/Makefile
index 614f28b..de46a78 100644
--- a/drivers/dma/Makefile
+++ b/drivers/dma/Makefile
@@ -66,6 +66,7 @@ obj-$(CONFIG_TI_DMA_CROSSBAR) += ti-dma-crossbar.o
 obj-$(CONFIG_TI_EDMA) += edma.o
 obj-$(CONFIG_XGENE_DMA) += xgene-dma.o
 obj-$(CONFIG_ZX_DMA) += zx296702_dma.o
+obj-$(CONFIG_ST_FDMA) += st_fdma.o
 
 obj-y += qcom/
 obj-y += xilinx/
diff --git a/drivers/dma/st_fdma.c b/drivers/dma/st_fdma.c
new file mode 100644
index 0000000..f28026e
--- /dev/null
+++ b/drivers/dma/st_fdma.c
@@ -0,0 +1,880 @@
+/*
+ * st_fdma.c
+ *
+ * Copyright (C) 2014 STMicroelectronics
+ * Author: Ludovic Barre <Ludovic.barre@st.com>
+ *	   Peter Griffin <peter.griffin@linaro.org>
+ * License terms:  GNU General Public License (GPL), version 2
+ */
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/of_device.h>
+#include <linux/of_dma.h>
+#include <linux/platform_device.h>
+#include <linux/interrupt.h>
+#include <linux/remoteproc.h>
+
+#include "st_fdma.h"
+
+static inline struct st_fdma_chan *to_st_fdma_chan(struct dma_chan *c)
+{
+	return container_of(c, struct st_fdma_chan, vchan.chan);
+}
+
+static struct st_fdma_desc *to_st_fdma_desc(struct virt_dma_desc *vd)
+{
+	return container_of(vd, struct st_fdma_desc, vdesc);
+}
+
+static int st_fdma_dreq_get(struct st_fdma_chan *fchan)
+{
+	struct st_fdma_dev *fdev = fchan->fdev;
+	u32 req_line_cfg = fchan->cfg.req_line;
+	u32 dreq_line;
+	int try = 0;
+
+	/*
+	 * dreq_mask is shared for n channels of fdma, so all accesses must be
+	 * atomic. if the dreq_mask is changed between ffz and set_bit,
+	 * we retry
+	 */
+	do {
+		if (fdev->dreq_mask == ~0L) {
+			dev_err(fdev->dev, "No req lines available\n");
+			return -EINVAL;
+		}
+
+		if (try || req_line_cfg >= ST_FDMA_NR_DREQS) {
+			dev_err(fdev->dev, "Invalid or used req line\n");
+			return -EINVAL;
+		} else {
+			dreq_line = req_line_cfg;
+		}
+
+		try++;
+	} while (test_and_set_bit(dreq_line, &fdev->dreq_mask));
+
+	dev_dbg(fdev->dev, "get dreq_line:%d mask:%#lx\n",
+		dreq_line, fdev->dreq_mask);
+
+	return dreq_line;
+}
+
+static void st_fdma_dreq_put(struct st_fdma_chan *fchan)
+{
+	struct st_fdma_dev *fdev = fchan->fdev;
+
+	dev_dbg(fdev->dev, "put dreq_line:%#x\n", fchan->dreq_line);
+	clear_bit(fchan->dreq_line, &fdev->dreq_mask);
+}
+
+static void st_fdma_xfer_desc(struct st_fdma_chan *fchan)
+{
+	struct virt_dma_desc *vdesc;
+	unsigned long nbytes, ch_cmd, cmd;
+
+	vdesc = vchan_next_desc(&fchan->vchan);
+	if (!vdesc)
+		return;
+
+	fchan->fdesc = to_st_fdma_desc(vdesc);
+	nbytes = fchan->fdesc->node[0].desc->nbytes;
+	cmd = FDMA_CMD_START(fchan->vchan.chan.chan_id);
+	ch_cmd = fchan->fdesc->node[0].pdesc | FDMA_CH_CMD_STA_START;
+
+	/* start the channel for the descriptor */
+	fnode_write(fchan, nbytes, FDMA_CNTN_OFST);
+	fchan_write(fchan, ch_cmd, FDMA_CH_CMD_OFST);
+	writel(cmd,
+		fchan->fdev->slim_rproc->peri + FDMA_CMD_SET_OFST);
+
+	dev_dbg(fchan->fdev->dev, "start chan:%d\n", fchan->vchan.chan.chan_id);
+}
+
+static void st_fdma_ch_sta_update(struct st_fdma_chan *fchan,
+				  unsigned long int_sta)
+{
+	unsigned long ch_sta, ch_err;
+	int ch_id = fchan->vchan.chan.chan_id;
+	struct st_fdma_dev *fdev = fchan->fdev;
+
+	ch_sta = fchan_read(fchan, FDMA_CH_CMD_OFST);
+	ch_err = ch_sta & FDMA_CH_CMD_ERR_MASK;
+	ch_sta &= FDMA_CH_CMD_STA_MASK;
+
+	if (int_sta & FDMA_INT_STA_ERR) {
+		dev_warn(fdev->dev, "chan:%d, error:%ld\n", ch_id, ch_err);
+		fchan->status = DMA_ERROR;
+		return;
+	}
+
+	switch (ch_sta) {
+	case FDMA_CH_CMD_STA_PAUSED:
+		fchan->status = DMA_PAUSED;
+		break;
+
+	case FDMA_CH_CMD_STA_RUNNING:
+		fchan->status = DMA_IN_PROGRESS;
+		break;
+	}
+}
+
+static irqreturn_t st_fdma_irq_handler(int irq, void *dev_id)
+{
+	struct st_fdma_dev *fdev = dev_id;
+	irqreturn_t ret = IRQ_NONE;
+	struct st_fdma_chan *fchan = &fdev->chans[0];
+	unsigned long int_sta, clr;
+
+	int_sta = fdma_read(fdev, FDMA_INT_STA_OFST);
+	clr = int_sta;
+
+	for (; int_sta != 0 ; int_sta >>= 2, fchan++) {
+		if (!(int_sta & (FDMA_INT_STA_CH | FDMA_INT_STA_ERR)))
+			continue;
+
+		spin_lock(&fchan->vchan.lock);
+		st_fdma_ch_sta_update(fchan, int_sta);
+
+		if (fchan->fdesc) {
+			if (!fchan->fdesc->iscyclic) {
+				list_del(&fchan->fdesc->vdesc.node);
+				vchan_cookie_complete(&fchan->fdesc->vdesc);
+				fchan->fdesc = NULL;
+				fchan->status = DMA_COMPLETE;
+			} else {
+				vchan_cyclic_callback(&fchan->fdesc->vdesc);
+			}
+
+			/* Start the next descriptor (if available) */
+			if (!fchan->fdesc)
+				st_fdma_xfer_desc(fchan);
+		}
+
+		spin_unlock(&fchan->vchan.lock);
+		ret = IRQ_HANDLED;
+	}
+
+	fdma_write(fdev, clr, FDMA_INT_CLR_OFST);
+
+	return ret;
+}
+
+static struct dma_chan *st_fdma_of_xlate(struct of_phandle_args *dma_spec,
+					 struct of_dma *ofdma)
+{
+	struct st_fdma_dev *fdev = ofdma->of_dma_data;
+	struct dma_chan *chan;
+	struct st_fdma_chan *fchan;
+	int ret;
+
+	if (dma_spec->args_count < 1)
+		return ERR_PTR(-EINVAL);
+
+	if (fdev->dma_device.dev->of_node != dma_spec->np)
+		return ERR_PTR(-EINVAL);
+
+	ret = rproc_boot(fdev->slim_rproc->rproc);
+	if (ret == -ENOENT)
+		return ERR_PTR(-EPROBE_DEFER);
+	else if (ret)
+		return ERR_PTR(ret);
+
+	chan = dma_get_any_slave_channel(&fdev->dma_device);
+	if (!chan)
+		goto err_chan;
+
+	fchan = to_st_fdma_chan(chan);
+
+	fchan->cfg.of_node = dma_spec->np;
+	fchan->cfg.req_line = dma_spec->args[0];
+	fchan->cfg.req_ctrl = 0;
+	fchan->cfg.type = ST_FDMA_TYPE_FREE_RUN;
+
+	if (dma_spec->args_count > 1)
+		fchan->cfg.req_ctrl = dma_spec->args[1]
+			& FDMA_REQ_CTRL_CFG_MASK;
+
+	if (dma_spec->args_count > 2)
+		fchan->cfg.type = dma_spec->args[2];
+
+	if (fchan->cfg.type == ST_FDMA_TYPE_FREE_RUN) {
+		fchan->dreq_line = 0;
+	} else {
+		fchan->dreq_line = st_fdma_dreq_get(fchan);
+		if (IS_ERR_VALUE(fchan->dreq_line)) {
+			chan = ERR_PTR(fchan->dreq_line);
+			goto err_chan;
+		}
+	}
+
+	dev_dbg(fdev->dev, "xlate req_line:%d type:%d req_ctrl:%#lx\n",
+		fchan->cfg.req_line, fchan->cfg.type, fchan->cfg.req_ctrl);
+
+	return chan;
+
+err_chan:
+	rproc_shutdown(fdev->slim_rproc->rproc);
+	return chan;
+
+}
+
+static void st_fdma_free_desc(struct virt_dma_desc *vdesc)
+{
+	struct st_fdma_desc *fdesc;
+	int i;
+
+	fdesc = to_st_fdma_desc(vdesc);
+	for (i = 0; i < fdesc->n_nodes; i++)
+		dma_pool_free(fdesc->fchan->node_pool, fdesc->node[i].desc,
+			      fdesc->node[i].pdesc);
+	kfree(fdesc);
+}
+
+static struct st_fdma_desc *st_fdma_alloc_desc(struct st_fdma_chan *fchan,
+					       int sg_len)
+{
+	struct st_fdma_desc *fdesc;
+	int i;
+
+	fdesc = kzalloc(sizeof(*fdesc) +
+			sizeof(struct st_fdma_sw_node) * sg_len, GFP_NOWAIT);
+	if (!fdesc)
+		return NULL;
+
+	fdesc->fchan = fchan;
+	fdesc->n_nodes = sg_len;
+	for (i = 0; i < sg_len; i++) {
+		fdesc->node[i].desc = dma_pool_alloc(fchan->node_pool,
+				GFP_NOWAIT, &fdesc->node[i].pdesc);
+		if (!fdesc->node[i].desc)
+			goto err;
+	}
+	return fdesc;
+
+err:
+	while (--i >= 0)
+		dma_pool_free(fchan->node_pool, fdesc->node[i].desc,
+			      fdesc->node[i].pdesc);
+	kfree(fdesc);
+	return NULL;
+}
+
+static int st_fdma_alloc_chan_res(struct dma_chan *chan)
+{
+	struct st_fdma_chan *fchan = to_st_fdma_chan(chan);
+
+	/* Create the dma pool for descriptor allocation */
+	fchan->node_pool = dma_pool_create(dev_name(&chan->dev->device),
+					    fchan->fdev->dev,
+					    sizeof(struct st_fdma_hw_node),
+					    __alignof__(struct st_fdma_hw_node),
+					    0);
+
+	if (!fchan->node_pool) {
+		dev_err(fchan->fdev->dev, "unable to allocate desc pool\n");
+		return -ENOMEM;
+	}
+
+	dev_dbg(fchan->fdev->dev, "alloc ch_id:%d type:%d\n",
+		fchan->vchan.chan.chan_id, fchan->cfg.type);
+
+	return 0;
+}
+
+static void st_fdma_free_chan_res(struct dma_chan *chan)
+{
+	struct st_fdma_chan *fchan = to_st_fdma_chan(chan);
+	struct rproc *rproc = fchan->fdev->slim_rproc->rproc;
+	unsigned long flags;
+
+	LIST_HEAD(head);
+
+	dev_dbg(fchan->fdev->dev, "%s: freeing chan:%d\n",
+		__func__, fchan->vchan.chan.chan_id);
+
+	if (fchan->cfg.type != ST_FDMA_TYPE_FREE_RUN)
+		st_fdma_dreq_put(fchan);
+
+	spin_lock_irqsave(&fchan->vchan.lock, flags);
+	fchan->fdesc = NULL;
+	spin_unlock_irqrestore(&fchan->vchan.lock, flags);
+
+	dma_pool_destroy(fchan->node_pool);
+	fchan->node_pool = NULL;
+	memset(&fchan->cfg, 0, sizeof(struct st_fdma_cfg));
+
+	rproc_shutdown(rproc);
+}
+
+static struct dma_async_tx_descriptor *st_fdma_prep_dma_memcpy(
+	struct dma_chan *chan,	dma_addr_t dst, dma_addr_t src,
+	size_t len, unsigned long flags)
+{
+	struct st_fdma_chan *fchan;
+	struct st_fdma_desc *fdesc;
+	struct st_fdma_hw_node *hw_node;
+
+	if (!len)
+		return NULL;
+
+	fchan = to_st_fdma_chan(chan);
+
+	/* We only require a single descriptor */
+	fdesc = st_fdma_alloc_desc(fchan, 1);
+	if (!fdesc) {
+		dev_err(fchan->fdev->dev, "no memory for desc\n");
+		return NULL;
+	}
+
+	hw_node = fdesc->node[0].desc;
+	hw_node->next = 0;
+	hw_node->control = FDMA_NODE_CTRL_REQ_MAP_FREE_RUN;
+	hw_node->control |= FDMA_NODE_CTRL_SRC_INCR;
+	hw_node->control |= FDMA_NODE_CTRL_DST_INCR;
+	hw_node->control |= FDMA_NODE_CTRL_INT_EON;
+	hw_node->nbytes = len;
+	hw_node->saddr = src;
+	hw_node->daddr = dst;
+	hw_node->generic.length = len;
+	hw_node->generic.sstride = 0;
+	hw_node->generic.dstride = 0;
+
+	return vchan_tx_prep(&fchan->vchan, &fdesc->vdesc, flags);
+}
+
+static int config_reqctrl(struct st_fdma_chan *fchan,
+			  enum dma_transfer_direction direction)
+{
+	u32 maxburst = 0, addr = 0;
+	enum dma_slave_buswidth width;
+	int ch_id = fchan->vchan.chan.chan_id;
+	struct st_fdma_dev *fdev = fchan->fdev;
+
+	switch (direction) {
+
+	case DMA_DEV_TO_MEM:
+		fchan->cfg.req_ctrl &= ~FDMA_REQ_CTRL_WNR;
+		maxburst = fchan->scfg.src_maxburst;
+		width = fchan->scfg.src_addr_width;
+		addr = fchan->scfg.src_addr;
+		break;
+
+	case DMA_MEM_TO_DEV:
+		fchan->cfg.req_ctrl |= FDMA_REQ_CTRL_WNR;
+		maxburst = fchan->scfg.dst_maxburst;
+		width = fchan->scfg.dst_addr_width;
+		addr = fchan->scfg.dst_addr;
+		break;
+
+	default:
+		return -EINVAL;
+	}
+
+	fchan->cfg.req_ctrl &= ~FDMA_REQ_CTRL_OPCODE_MASK;
+
+	switch (width) {
+
+	case DMA_SLAVE_BUSWIDTH_1_BYTE:
+		fchan->cfg.req_ctrl |= FDMA_REQ_CTRL_OPCODE_LD_ST1;
+		break;
+
+	case DMA_SLAVE_BUSWIDTH_2_BYTES:
+		fchan->cfg.req_ctrl |= FDMA_REQ_CTRL_OPCODE_LD_ST2;
+		break;
+
+	case DMA_SLAVE_BUSWIDTH_4_BYTES:
+		fchan->cfg.req_ctrl |= FDMA_REQ_CTRL_OPCODE_LD_ST4;
+		break;
+
+	case DMA_SLAVE_BUSWIDTH_8_BYTES:
+		fchan->cfg.req_ctrl |= FDMA_REQ_CTRL_OPCODE_LD_ST8;
+		break;
+
+	default:
+		return -EINVAL;
+	}
+
+	fchan->cfg.req_ctrl &= ~FDMA_REQ_CTRL_NUM_OPS_MASK;
+	fchan->cfg.req_ctrl |= FDMA_REQ_CTRL_NUM_OPS(maxburst-1);
+	dreq_write(fchan, fchan->cfg.req_ctrl, FDMA_REQ_CTRL_OFST);
+
+	fchan->cfg.dev_addr = addr;
+	fchan->cfg.dir = direction;
+
+	dev_dbg(fdev->dev, "chan:%d config_reqctrl:%#x req_ctrl:%#lx\n",
+		ch_id, addr, fchan->cfg.req_ctrl);
+
+	return 0;
+}
+
+static void fill_hw_node(struct st_fdma_hw_node *hw_node,
+			struct st_fdma_chan *fchan,
+			enum dma_transfer_direction direction)
+{
+	if (direction == DMA_MEM_TO_DEV) {
+		hw_node->control |= FDMA_NODE_CTRL_SRC_INCR;
+		hw_node->control |= FDMA_NODE_CTRL_DST_STATIC;
+		hw_node->daddr = fchan->cfg.dev_addr;
+	} else {
+		hw_node->control |= FDMA_NODE_CTRL_SRC_STATIC;
+		hw_node->control |= FDMA_NODE_CTRL_DST_INCR;
+		hw_node->saddr = fchan->cfg.dev_addr;
+	}
+
+	hw_node->generic.sstride = 0;
+	hw_node->generic.dstride = 0;
+}
+
+static struct st_fdma_chan *st_fdma_prep_common(struct dma_chan *chan,
+		size_t len, enum dma_transfer_direction direction)
+{
+	struct st_fdma_chan *fchan;
+
+	if (!chan || !len)
+		return NULL;
+
+	fchan = to_st_fdma_chan(chan);
+
+	if (!is_slave_direction(direction)) {
+		dev_err(fchan->fdev->dev, "bad direction?\n");
+		return NULL;
+	}
+
+	return fchan;
+}
+
+static struct dma_async_tx_descriptor *st_fdma_prep_dma_cyclic(
+		struct dma_chan *chan, dma_addr_t buf_addr, size_t len,
+		size_t period_len, enum dma_transfer_direction direction,
+		unsigned long flags)
+{
+	struct st_fdma_chan *fchan;
+	struct st_fdma_desc *fdesc;
+	int sg_len, i;
+
+	fchan = st_fdma_prep_common(chan, len, direction);
+	if (!fchan)
+		return NULL;
+
+	if (!period_len)
+		return NULL;
+
+	if (config_reqctrl(fchan, direction)) {
+		dev_err(fchan->fdev->dev, "bad width or direction\n");
+		return NULL;
+	}
+
+	/* the buffer length must be a multiple of period_len */
+	if (len % period_len != 0) {
+		dev_err(fchan->fdev->dev, "len is not multiple of period\n");
+		return NULL;
+	}
+
+	sg_len = len / period_len;
+	fdesc = st_fdma_alloc_desc(fchan, sg_len);
+	if (!fdesc) {
+		dev_err(fchan->fdev->dev, "no memory for desc\n");
+		return NULL;
+	}
+
+	fdesc->iscyclic = true;
+
+	for (i = 0; i < sg_len; i++) {
+		struct st_fdma_hw_node *hw_node = fdesc->node[i].desc;
+
+		hw_node->next = fdesc->node[(i + 1) % sg_len].pdesc;
+
+		hw_node->control =
+			FDMA_NODE_CTRL_REQ_MAP_DREQ(fchan->dreq_line);
+		hw_node->control |= FDMA_NODE_CTRL_INT_EON;
+
+		fill_hw_node(hw_node, fchan, direction);
+
+		if (direction == DMA_MEM_TO_DEV)
+			hw_node->saddr = buf_addr + (i * period_len);
+		else
+			hw_node->daddr = buf_addr + (i * period_len);
+
+		hw_node->nbytes = period_len;
+		hw_node->generic.length = period_len;
+	}
+
+	return vchan_tx_prep(&fchan->vchan, &fdesc->vdesc, flags);
+}
+
+static struct dma_async_tx_descriptor *st_fdma_prep_slave_sg(
+		struct dma_chan *chan, struct scatterlist *sgl,
+		unsigned int sg_len, enum dma_transfer_direction direction,
+		unsigned long flags, void *context)
+{
+	struct st_fdma_chan *fchan;
+	struct st_fdma_desc *fdesc;
+	struct st_fdma_hw_node *hw_node;
+	struct scatterlist *sg;
+	int i;
+
+	fchan = st_fdma_prep_common(chan, sg_len, direction);
+	if (!fchan)
+		return NULL;
+
+	if (!sgl)
+		return NULL;
+
+	fdesc = st_fdma_alloc_desc(fchan, sg_len);
+	if (!fdesc) {
+		dev_err(fchan->fdev->dev, "no memory for desc\n");
+		return NULL;
+	}
+
+	fdesc->iscyclic = false;
+
+	for_each_sg(sgl, sg, sg_len, i) {
+		hw_node = fdesc->node[i].desc;
+
+		hw_node->next = fdesc->node[(i + 1) % sg_len].pdesc;
+		hw_node->control = FDMA_NODE_CTRL_REQ_MAP_DREQ(fchan->dreq_line);
+
+		fill_hw_node(hw_node, fchan, direction);
+
+		if (direction == DMA_MEM_TO_DEV)
+			hw_node->saddr = sg_dma_address(sg);
+		else
+			hw_node->daddr = sg_dma_address(sg);
+
+		hw_node->nbytes = sg_dma_len(sg);
+		hw_node->generic.length = sg_dma_len(sg);
+	}
+
+	/* interrupt at end of last node */
+	hw_node->control |= FDMA_NODE_CTRL_INT_EON;
+
+	return vchan_tx_prep(&fchan->vchan, &fdesc->vdesc, flags);
+}
+
+static size_t st_fdma_desc_residue(struct st_fdma_chan *fchan,
+				   struct virt_dma_desc *vdesc,
+				   bool in_progress)
+{
+	struct st_fdma_desc *fdesc = fchan->fdesc;
+	size_t residue = 0;
+	dma_addr_t cur_addr = 0;
+	int i;
+
+	if (in_progress) {
+		cur_addr = fchan_read(fchan, FDMA_CH_CMD_OFST);
+		cur_addr &= FDMA_CH_CMD_DATA_MASK;
+	}
+
+	for (i = fchan->fdesc->n_nodes - 1 ; i >= 0; i--) {
+		if (cur_addr == fdesc->node[i].pdesc) {
+			residue += fnode_read(fchan, FDMA_CNTN_OFST);
+			break;
+		}
+		residue += fdesc->node[i].desc->nbytes;
+	}
+
+	return residue;
+}
+
+static enum dma_status st_fdma_tx_status(struct dma_chan *chan,
+					 dma_cookie_t cookie,
+					 struct dma_tx_state *txstate)
+{
+	struct st_fdma_chan *fchan = to_st_fdma_chan(chan);
+	struct virt_dma_desc *vd;
+	enum dma_status ret;
+	unsigned long flags;
+
+	ret = dma_cookie_status(chan, cookie, txstate);
+	if (ret == DMA_COMPLETE || !txstate)
+		return ret;
+
+	spin_lock_irqsave(&fchan->vchan.lock, flags);
+	vd = vchan_find_desc(&fchan->vchan, cookie);
+	if (fchan->fdesc && cookie == fchan->fdesc->vdesc.tx.cookie)
+		txstate->residue = st_fdma_desc_residue(fchan, vd, true);
+	else if (vd)
+		txstate->residue = st_fdma_desc_residue(fchan, vd, false);
+	else
+		txstate->residue = 0;
+
+	spin_unlock_irqrestore(&fchan->vchan.lock, flags);
+
+	return ret;
+}
+
+static void st_fdma_issue_pending(struct dma_chan *chan)
+{
+	struct st_fdma_chan *fchan = to_st_fdma_chan(chan);
+	unsigned long flags;
+
+	spin_lock_irqsave(&fchan->vchan.lock, flags);
+
+	if (vchan_issue_pending(&fchan->vchan) && !fchan->fdesc)
+		st_fdma_xfer_desc(fchan);
+
+	spin_unlock_irqrestore(&fchan->vchan.lock, flags);
+}
+
+static int st_fdma_pause(struct dma_chan *chan)
+{
+	unsigned long flags;
+	LIST_HEAD(head);
+	struct st_fdma_chan *fchan = to_st_fdma_chan(chan);
+	int ch_id = fchan->vchan.chan.chan_id;
+	unsigned long cmd = FDMA_CMD_PAUSE(ch_id);
+
+	dev_dbg(fchan->fdev->dev, "pause chan:%d\n", ch_id);
+
+	spin_lock_irqsave(&fchan->vchan.lock, flags);
+	if (fchan->fdesc)
+		fdma_write(fchan->fdev, cmd, FDMA_CMD_SET_OFST);
+	spin_unlock_irqrestore(&fchan->vchan.lock, flags);
+
+	return 0;
+}
+
+static int st_fdma_resume(struct dma_chan *chan)
+{
+	unsigned long flags;
+	unsigned long val;
+	struct st_fdma_chan *fchan = to_st_fdma_chan(chan);
+	int ch_id = fchan->vchan.chan.chan_id;
+
+	dev_dbg(fchan->fdev->dev, "resume chan:%d\n", ch_id);
+
+	spin_lock_irqsave(&fchan->vchan.lock, flags);
+	if (fchan->fdesc) {
+		val = fchan_read(fchan, FDMA_CH_CMD_OFST);
+		val &= FDMA_CH_CMD_DATA_MASK;
+		fchan_write(fchan, val, FDMA_CH_CMD_OFST);
+	}
+	spin_unlock_irqrestore(&fchan->vchan.lock, flags);
+
+	return 0;
+}
+
+static int st_fdma_terminate_all(struct dma_chan *chan)
+{
+	unsigned long flags;
+	LIST_HEAD(head);
+	struct st_fdma_chan *fchan = to_st_fdma_chan(chan);
+	int ch_id = fchan->vchan.chan.chan_id;
+	unsigned long cmd = FDMA_CMD_PAUSE(ch_id);
+
+	dev_dbg(fchan->fdev->dev, "terminate chan:%d\n", ch_id);
+
+	spin_lock_irqsave(&fchan->vchan.lock, flags);
+	fdma_write(fchan->fdev, cmd, FDMA_CMD_SET_OFST);
+	fchan->fdesc = NULL;
+	vchan_get_all_descriptors(&fchan->vchan, &head);
+	spin_unlock_irqrestore(&fchan->vchan.lock, flags);
+	vchan_dma_desc_free_list(&fchan->vchan, &head);
+
+	return 0;
+}
+
+static int st_fdma_slave_config(struct dma_chan *chan,
+				struct dma_slave_config *slave_cfg)
+{
+	struct st_fdma_chan *fchan = to_st_fdma_chan(chan);
+
+	memcpy(&fchan->scfg, slave_cfg, sizeof(fchan->scfg));
+	return 0;
+}
+
+static const struct st_fdma_driverdata fdma_mpe31_stih407_11 = {
+	.name = "STiH407",
+	.id = 0,
+};
+
+static const struct st_fdma_driverdata fdma_mpe31_stih407_12 = {
+	.name = "STiH407",
+	.id = 1,
+};
+
+static const struct st_fdma_driverdata fdma_mpe31_stih407_13 = {
+	.name = "STiH407",
+	.id = 2,
+};
+
+static const struct of_device_id st_fdma_match[] = {
+	{ .compatible = "st,stih407-fdma-mpe31-11"
+	  , .data = &fdma_mpe31_stih407_11 },
+	{ .compatible = "st,stih407-fdma-mpe31-12"
+	  , .data = &fdma_mpe31_stih407_12 },
+	{ .compatible = "st,stih407-fdma-mpe31-13"
+	  , .data = &fdma_mpe31_stih407_13 },
+	{},
+};
+MODULE_DEVICE_TABLE(of, st_fdma_match);
+
+static int st_fdma_parse_dt(struct platform_device *pdev,
+			const struct st_fdma_driverdata *drvdata,
+			struct st_fdma_dev *fdev)
+{
+	struct device_node *np = pdev->dev.of_node;
+	int ret;
+
+	if (!np)
+		goto err;
+
+	ret = of_property_read_u32(np, "dma-channels", &fdev->nr_channels);
+	if (ret)
+		goto err;
+
+	snprintf(fdev->fw_name, FW_NAME_SIZE, "fdma_%s_%d.elf",
+		drvdata->name, drvdata->id);
+
+err:
+	return ret;
+}
+#define FDMA_DMA_BUSWIDTHS	(BIT(DMA_SLAVE_BUSWIDTH_1_BYTE) | \
+				 BIT(DMA_SLAVE_BUSWIDTH_2_BYTES) | \
+				 BIT(DMA_SLAVE_BUSWIDTH_3_BYTES) | \
+				 BIT(DMA_SLAVE_BUSWIDTH_4_BYTES))
+
+static int st_fdma_probe(struct platform_device *pdev)
+{
+	struct st_fdma_dev *fdev;
+	const struct of_device_id *match;
+	struct device_node *np = pdev->dev.of_node;
+	const struct st_fdma_driverdata *drvdata;
+	int ret, i;
+
+	match = of_match_device((st_fdma_match), &pdev->dev);
+	if (!match || !match->data) {
+		dev_err(&pdev->dev, "No device match found\n");
+		return -ENODEV;
+	}
+
+	drvdata = match->data;
+
+	fdev = devm_kzalloc(&pdev->dev, sizeof(*fdev), GFP_KERNEL);
+	if (!fdev)
+		return -ENOMEM;
+
+	ret = st_fdma_parse_dt(pdev, drvdata, fdev);
+	if (ret) {
+		dev_err(&pdev->dev, "unable to find platform data\n");
+		goto err;
+	}
+
+	fdev->chans = devm_kzalloc(&pdev->dev,
+				   fdev->nr_channels
+				   * sizeof(struct st_fdma_chan), GFP_KERNEL);
+	if (!fdev->chans)
+		return -ENOMEM;
+
+	fdev->dev = &pdev->dev;
+	fdev->drvdata = drvdata;
+	platform_set_drvdata(pdev, fdev);
+
+	fdev->irq = platform_get_irq(pdev, 0);
+	if (fdev->irq < 0) {
+		dev_err(&pdev->dev, "Failed to get irq resource\n");
+		return -EINVAL;
+	}
+
+	ret = devm_request_irq(&pdev->dev, fdev->irq, st_fdma_irq_handler, 0,
+			       dev_name(&pdev->dev), fdev);
+	if (ret) {
+		dev_err(&pdev->dev, "Failed to request irq (%d)\n", ret);
+		goto err;
+	}
+
+	fdev->slim_rproc = slim_rproc_alloc(pdev, fdev->fw_name);
+	if (!fdev->slim_rproc) {
+		ret = PTR_ERR(fdev->slim_rproc);
+		dev_err(&pdev->dev, "slim_rproc_alloc failed (%d)\n", ret);
+		goto err;
+	}
+
+	/* Initialise list of FDMA channels */
+	INIT_LIST_HEAD(&fdev->dma_device.channels);
+	for (i = 0; i < fdev->nr_channels; i++) {
+		struct st_fdma_chan *fchan = &fdev->chans[i];
+
+		fchan->fdev = fdev;
+		fchan->vchan.desc_free = st_fdma_free_desc;
+		vchan_init(&fchan->vchan, &fdev->dma_device);
+	}
+
+	/* Initialise the FDMA dreq (reserve 0 & 31 for FDMA use) */
+	fdev->dreq_mask = BIT(0) | BIT(31);
+
+	dma_cap_set(DMA_SLAVE, fdev->dma_device.cap_mask);
+	dma_cap_set(DMA_CYCLIC, fdev->dma_device.cap_mask);
+	dma_cap_set(DMA_MEMCPY, fdev->dma_device.cap_mask);
+
+	fdev->dma_device.dev = &pdev->dev;
+	fdev->dma_device.device_alloc_chan_resources = st_fdma_alloc_chan_res;
+	fdev->dma_device.device_free_chan_resources = st_fdma_free_chan_res;
+	fdev->dma_device.device_prep_dma_cyclic	= st_fdma_prep_dma_cyclic;
+	fdev->dma_device.device_prep_slave_sg = st_fdma_prep_slave_sg;
+	fdev->dma_device.device_prep_dma_memcpy = st_fdma_prep_dma_memcpy;
+	fdev->dma_device.device_tx_status = st_fdma_tx_status;
+	fdev->dma_device.device_issue_pending = st_fdma_issue_pending;
+	fdev->dma_device.device_terminate_all = st_fdma_terminate_all;
+	fdev->dma_device.device_config = st_fdma_slave_config;
+	fdev->dma_device.device_pause = st_fdma_pause;
+	fdev->dma_device.device_resume = st_fdma_resume;
+
+	fdev->dma_device.src_addr_widths = FDMA_DMA_BUSWIDTHS;
+	fdev->dma_device.dst_addr_widths = FDMA_DMA_BUSWIDTHS;
+	fdev->dma_device.directions = BIT(DMA_DEV_TO_MEM) | BIT(DMA_MEM_TO_DEV);
+	fdev->dma_device.residue_granularity = DMA_RESIDUE_GRANULARITY_BURST;
+
+	ret = dma_async_device_register(&fdev->dma_device);
+	if (ret) {
+		dev_err(&pdev->dev,
+			"Failed to register DMA device (%d)\n", ret);
+		goto err_rproc;
+	}
+
+	ret = of_dma_controller_register(np, st_fdma_of_xlate, fdev);
+	if (ret) {
+		dev_err(&pdev->dev,
+			"Failed to register controller (%d)\n", ret);
+		goto err_dma_dev;
+	}
+
+	dev_info(&pdev->dev, "ST FDMA engine driver, irq:%d\n", fdev->irq);
+
+	return 0;
+
+err_dma_dev:
+	dma_async_device_unregister(&fdev->dma_device);
+err_rproc:
+	slim_rproc_put(fdev->slim_rproc);
+err:
+	return ret;
+}
+
+static int st_fdma_remove(struct platform_device *pdev)
+{
+	struct st_fdma_dev *fdev = platform_get_drvdata(pdev);
+
+	devm_free_irq(&pdev->dev, fdev->irq, fdev);
+	slim_rproc_put(fdev->slim_rproc);
+	of_dma_controller_free(pdev->dev.of_node);
+	dma_async_device_unregister(&fdev->dma_device);
+
+	return 0;
+}
+
+static struct platform_driver st_fdma_platform_driver = {
+	.driver = {
+		.name = "st-fdma",
+		.of_match_table = st_fdma_match,
+	},
+	.probe = st_fdma_probe,
+	.remove = st_fdma_remove,
+};
+module_platform_driver(st_fdma_platform_driver);
+
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("STMicroelectronics FDMA engine driver");
+MODULE_AUTHOR("Ludovic.barre <Ludovic.barre@st.com>");
+MODULE_AUTHOR("Peter Griffin <peter.griffin@linaro.org>");
-- 
1.9.1

[PATCH v5 07/18] ARM: STi: DT: STiH407: Add FDMA driver dt nodes.

[Peter Griffin]

These nodes are required to get the fdma driver working
on STiH407 based silicon.

Signed-off-by: Peter Griffin <peter.griffin@linaro.org>
---
 arch/arm/boot/dts/stih407-family.dtsi | 52 +++++++++++++++++++++++++++++++++++
 1 file changed, 52 insertions(+)

diff --git a/arch/arm/boot/dts/stih407-family.dtsi b/arch/arm/boot/dts/stih407-family.dtsi
index c47c664..017d670 100644
--- a/arch/arm/boot/dts/stih407-family.dtsi
+++ b/arch/arm/boot/dts/stih407-family.dtsi
@@ -822,5 +822,57 @@
 			clock-frequency	= <600000000>;
 			st,syscfg	= <&syscfg_core 0x224>;
 		};
+
+		/* fdma audio */
+		fdma0: dma-controller@8e20000 {
+			compatible = "st,stih407-fdma-mpe31-11", "st,slim-rproc";
+			reg = <0x8e20000 0x8000>,
+			      <0x8e30000 0x3000>,
+			      <0x8e37000 0x1000>,
+			      <0x8e38000 0x8000>;
+			reg-names = "slimcore", "dmem", "peripherals", "imem";
+			clocks = <&clk_s_c0_flexgen CLK_FDMA>,
+				 <&clk_s_c0_flexgen CLK_EXT2F_A9>,
+				 <&clk_s_c0_flexgen CLK_EXT2F_A9>,
+				 <&clk_s_c0_flexgen CLK_EXT2F_A9>;
+			interrupts = <GIC_SPI 5 IRQ_TYPE_NONE>;
+			dma-channels = <16>;
+			#dma-cells = <3>;
+		};
+
+		/* fdma app */
+		fdma1: dma-controller@8e40000 {
+			compatible = "st,stih407-fdma-mpe31-12", "st,slim-rproc";
+			reg = <0x8e40000 0x8000>,
+			      <0x8e50000 0x3000>,
+			      <0x8e57000 0x1000>,
+			      <0x8e58000 0x8000>;
+			reg-names = "slimcore", "dmem", "peripherals", "imem";
+			clocks = <&clk_s_c0_flexgen CLK_FDMA>,
+				<&clk_s_c0_flexgen CLK_TX_ICN_DMU>,
+				<&clk_s_c0_flexgen CLK_TX_ICN_DMU>,
+				<&clk_s_c0_flexgen CLK_EXT2F_A9>;
+
+			interrupts = <GIC_SPI 7 IRQ_TYPE_NONE>;
+			dma-channels = <16>;
+			#dma-cells = <3>;
+		};
+
+		/* fdma free running */
+		fdma2: dma-controller@8e60000 {
+			compatible = "st,stih407-fdma-mpe31-13", "st,slim-rproc";
+			reg = <0x8e60000 0x8000>,
+			      <0x8e70000 0x3000>,
+			      <0x8e77000 0x1000>,
+			      <0x8e78000 0x8000>;
+			reg-names = "slimcore", "dmem", "peripherals", "imem";
+			interrupts = <GIC_SPI 9 IRQ_TYPE_NONE>;
+			dma-channels = <16>;
+			#dma-cells = <3>;
+			clocks = <&clk_s_c0_flexgen CLK_FDMA>,
+				<&clk_s_c0_flexgen CLK_EXT2F_A9>,
+				<&clk_s_c0_flexgen CLK_TX_ICN_DISP_0>,
+				<&clk_s_c0_flexgen CLK_EXT2F_A9>;
+		};
 	};
 };
-- 
1.9.1

[PATCH v5 08/18] MAINTAINERS: Add FDMA driver files to STi section.

[Peter Griffin]

This patch adds the FDMA driver files to the STi
section of the maintainers file.

Signed-off-by: Peter Griffin <peter.griffin@linaro.org>
Acked-by: Lee Jones <lee.jones@linaro.org>
---
 MAINTAINERS | 1 +
 1 file changed, 1 insertion(+)

diff --git a/MAINTAINERS b/MAINTAINERS
index 8f16983..e1eb5a8 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -1702,6 +1702,7 @@ F:	drivers/char/hw_random/st-rng.c
 F:	drivers/clocksource/arm_global_timer.c
 F:	drivers/clocksource/clksrc_st_lpc.c
 F:	drivers/cpufreq/sti-cpufreq.c
+F:	drivers/dma/st_fdma*
 F:	drivers/i2c/busses/i2c-st.c
 F:	drivers/media/rc/st_rc.c
 F:	drivers/media/platform/sti/c8sectpfe/
-- 
1.9.1

[PATCH v5 09/18] ARM: multi_v7_defconfig: Enable STi FDMA driver

[Peter Griffin]

This DMA controller is found on all STi chipsets.

Signed-off-by: Peter Griffin <peter.griffin@linaro.org>
Acked-by: Lee Jones <lee.jones@linaro.org>
---
 arch/arm/configs/multi_v7_defconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm/configs/multi_v7_defconfig b/arch/arm/configs/multi_v7_defconfig
index f30489e..1c34e17 100644
--- a/arch/arm/configs/multi_v7_defconfig
+++ b/arch/arm/configs/multi_v7_defconfig
@@ -746,6 +746,7 @@ CONFIG_DMA_OMAP=y
 CONFIG_QCOM_BAM_DMA=y
 CONFIG_XILINX_VDMA=y
 CONFIG_DMA_SUN6I=y
+CONFIG_ST_FDMA=m
 CONFIG_STAGING=y
 CONFIG_SENSORS_ISL29018=y
 CONFIG_SENSORS_ISL29028=y
-- 
1.9.1

[PATCH v5 10/18] ASoC: sti: Update DT example to match the driver code

[Peter Griffin]

uniperiph-id, version and mode are ST specific bindings and
need the 'st,' prefix. Update the examples, as otherwise copying
them yields a runtime error parsing the DT node.

Signed-off-by: Peter Griffin <peter.griffin@linaro.org>
Acked-by: Rob Herring <robh@kernel.org>
Cc: arnaud.pouliquen@st.com
Cc: broonie@kernel.org
---
 .../devicetree/bindings/sound/st,sti-asoc-card.txt   | 20 ++++++++++----------
 1 file changed, 10 insertions(+), 10 deletions(-)

diff --git a/Documentation/devicetree/bindings/sound/st,sti-asoc-card.txt b/Documentation/devicetree/bindings/sound/st,sti-asoc-card.txt
index 4d9a83d..16bcdfb 100644
--- a/Documentation/devicetree/bindings/sound/st,sti-asoc-card.txt
+++ b/Documentation/devicetree/bindings/sound/st,sti-asoc-card.txt
@@ -33,11 +33,11 @@ Required properties:
 	"tx" for "st,sti-uni-player" compatibility
 	"rx" for "st,sti-uni-reader" compatibility
 
-  - version: IP version integrated in SOC.
+  - st,version: IP version integrated in SOC.
 
   - dai-name: DAI name that describes the IP.
 
-  - IP mode: IP working mode depending on associated codec.
+  - st,mode: IP working mode depending on associated codec.
 	"HDMI" connected to HDMI codec and support IEC HDMI formats (player only).
 	"SPDIF" connected to SPDIF codec and support SPDIF formats (player only).
 	"PCM" PCM standard mode for I2S or TDM bus.
@@ -47,7 +47,7 @@ Required properties ("st,sti-uni-player" compatibility only):
   - clocks: CPU_DAI IP clock source, listed in the same order than the
 	    CPU_DAI properties.
 
-  - uniperiph-id: internal SOC IP instance ID.
+  - st,uniperiph-id: internal SOC IP instance ID.
 
 Optional properties:
   - pinctrl-0: defined for CPU_DAI@1 and CPU_DAI@4 to describe I2S PIOs for
@@ -84,9 +84,9 @@ Example:
 		dmas = <&fdma0 4 0 1>;
 		dai-name = "Uni Player #2 (DAC)";
 		dma-names = "tx";
-		uniperiph-id = <2>;
-		version = <5>;
-		mode = "PCM";
+		st,uniperiph-id = <2>;
+		st,version = <5>;
+		st,mode = "PCM";
 	};
 
 	sti_uni_player3: sti-uni-player@3 {
@@ -100,9 +100,9 @@ Example:
 		dmas = <&fdma0 7 0 1>;
 		dma-names = "tx";
 		dai-name = "Uni Player #3 (SPDIF)";
-		uniperiph-id = <3>;
-		version = <5>;
-		mode = "SPDIF";
+		st,uniperiph-id = <3>;
+		st,version = <5>;
+		st,mode = "SPDIF";
 	};
 
 	sti_uni_reader1: sti-uni-reader@1 {
@@ -115,7 +115,7 @@ Example:
 		dmas = <&fdma0 6 0 1>;
 		dma-names = "rx";
 		dai-name = "Uni Reader #1 (HDMI RX)";
-		version = <3>;
+		st,version = <3>;
 		st,mode = "PCM";
 	};
 
-- 
1.9.1

[PATCH v5 11/18] ARM: multi_v7_defconfig: Enable STi and simple-card drivers.

[Peter Griffin]

This patch enables the STi ALSA drivers found on STi platforms
as well as the simple-card driver which is a dependency to have
working sound.

Signed-off-by: Peter Griffin <peter.griffin@linaro.org>
Cc: arnaud.pouliquen@st.com
Cc: broonie@kernel.org
---
 arch/arm/configs/multi_v7_defconfig | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/arch/arm/configs/multi_v7_defconfig b/arch/arm/configs/multi_v7_defconfig
index 1c34e17..529b923 100644
--- a/arch/arm/configs/multi_v7_defconfig
+++ b/arch/arm/configs/multi_v7_defconfig
@@ -607,6 +607,9 @@ CONFIG_SND_SOC_AK4642=m
 CONFIG_SND_SOC_SGTL5000=m
 CONFIG_SND_SOC_SPDIF=m
 CONFIG_SND_SOC_WM8978=m
+CONFIG_SND_SOC_STI=m
+CONFIG_SND_SOC_STI_SAS=m
+CONFIG_SND_SIMPLE_CARD=m
 CONFIG_USB=y
 CONFIG_USB_XHCI_HCD=y
 CONFIG_USB_XHCI_MVEBU=y
-- 
1.9.1

[PATCH v5 12/18] ARM: DT: STiH407: Add i2s_out pinctrl configuration

[Peter Griffin]

This patch adds the pinctrl config for the i2s_out pins
used by the uniperif player IP.

Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen@st.com>
Signed-off-by: Peter Griffin <peter.griffin@linaro.org>
---
 arch/arm/boot/dts/stih407-pinctrl.dtsi | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/arch/arm/boot/dts/stih407-pinctrl.dtsi b/arch/arm/boot/dts/stih407-pinctrl.dtsi
index a538ae5..0fb5c8a 100644
--- a/arch/arm/boot/dts/stih407-pinctrl.dtsi
+++ b/arch/arm/boot/dts/stih407-pinctrl.dtsi
@@ -1067,6 +1067,29 @@
 				};
 			};
 
+			i2s_out {
+				pinctrl_i2s_8ch_out: i2s_8ch_out{
+					st,pins {
+						mclk = <&pio33 5 ALT1 OUT>;
+						lrclk = <&pio33 7 ALT1 OUT>;
+						sclk = <&pio33 6 ALT1 OUT>;
+						data0 = <&pio33 4 ALT1 OUT>;
+						data1 = <&pio34 0 ALT1 OUT>;
+						data2 = <&pio34 1 ALT1 OUT>;
+						data3 = <&pio34 2 ALT1 OUT>;
+					};
+				};
+
+				pinctrl_i2s_2ch_out: i2s_2ch_out{
+					st,pins {
+						mclk = <&pio33 5 ALT1 OUT>;
+						lrclk = <&pio33 7 ALT1 OUT>;
+						sclk = <&pio33 6 ALT1 OUT>;
+						data0 = <&pio33 4 ALT1 OUT>;
+					};
+				};
+			};
+
 			serial3 {
 				pinctrl_serial3: serial3-0 {
 					st,pins {
-- 
1.9.1

[PATCH v5 13/18] ARM: DT: STiH407: Add i2s_in pinctrl configuration

[Peter Griffin]

This patch adds the pinctrl config for the i2s_in pins
used by the uniperif reader IP.

Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen@st.com>
Signed-off-by: Peter Griffin <peter.griffin@linaro.org>
---
 arch/arm/boot/dts/stih407-pinctrl.dtsi | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/arch/arm/boot/dts/stih407-pinctrl.dtsi b/arch/arm/boot/dts/stih407-pinctrl.dtsi
index 0fb5c8a..537db7e 100644
--- a/arch/arm/boot/dts/stih407-pinctrl.dtsi
+++ b/arch/arm/boot/dts/stih407-pinctrl.dtsi
@@ -1090,6 +1090,30 @@
 				};
 			};
 
+			i2s_in {
+				pinctrl_i2s_8ch_in: i2s_8ch_in{
+					st,pins {
+						mclk = <&pio32 5 ALT1 IN>;
+						lrclk = <&pio32 7 ALT1 IN>;
+						sclk = <&pio32 6 ALT1 IN>;
+						data0 = <&pio32 4 ALT1 IN>;
+						data1 = <&pio33 0 ALT1 IN>;
+						data2 = <&pio33 1 ALT1 IN>;
+						data3 = <&pio33 2 ALT1 IN>;
+						data4 = <&pio33 3 ALT1 IN>;
+					};
+				};
+
+				pinctrl_i2s_2ch_in: i2s_2ch_in{
+					st,pins {
+						mclk = <&pio32 5 ALT1 IN>;
+						lrclk = <&pio32 7 ALT1 IN>;
+						sclk = <&pio32 6 ALT1 IN>;
+						data0 = <&pio32 4 ALT1 IN>;
+					};
+				};
+			};
+
 			serial3 {
 				pinctrl_serial3: serial3-0 {
 					st,pins {
-- 
1.9.1

[PATCH v5 14/18] ARM: DT: STiH407: Add spdif_out pinctrl config

[Peter Griffin]

This patch adds the pinctrl config for the spidf out
pins used by the sasg codec IP.

Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen@st.com>
Signed-off-by: Peter Griffin <peter.griffin@linaro.org>
---
 arch/arm/boot/dts/stih407-pinctrl.dtsi | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/arch/arm/boot/dts/stih407-pinctrl.dtsi b/arch/arm/boot/dts/stih407-pinctrl.dtsi
index 537db7e..598dbab 100644
--- a/arch/arm/boot/dts/stih407-pinctrl.dtsi
+++ b/arch/arm/boot/dts/stih407-pinctrl.dtsi
@@ -1114,6 +1114,14 @@
 				};
 			};
 
+			spdif_out {
+				pinctrl_spdif_out: spdif_out{
+					st,pins {
+						spdif_out = <&pio34 7 ALT1 OUT>;
+					};
+				};
+			};
+
 			serial3 {
 				pinctrl_serial3: serial3-0 {
 					st,pins {
-- 
1.9.1

[PATCH v5 15/18] ARM: STi: DT: STiH407: Add sti-sasg-codec dt node

[Peter Griffin]

This patch adds the dt node for the internal audio
codec IP.

Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen@st.com>
Signed-off-by: Peter Griffin <peter.griffin@linaro.org>
---
 arch/arm/boot/dts/stih407-family.dtsi | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/arch/arm/boot/dts/stih407-family.dtsi b/arch/arm/boot/dts/stih407-family.dtsi
index 017d670..3d74bc2 100644
--- a/arch/arm/boot/dts/stih407-family.dtsi
+++ b/arch/arm/boot/dts/stih407-family.dtsi
@@ -874,5 +874,12 @@
 				<&clk_s_c0_flexgen CLK_TX_ICN_DISP_0>,
 				<&clk_s_c0_flexgen CLK_EXT2F_A9>;
 		};
+
+		sti_sasg_codec: sti-sasg-codec {
+			compatible = "st,stih407-sas-codec";
+			#sound-dai-cells = <1>;
+			status = "disabled";
+			st,syscfg = <&syscfg_core>;
+		};
 	};
 };
-- 
1.9.1

[PATCH v5 16/18] ARM: STi: DT: STiH407: Add uniperif player dt nodes

[Peter Griffin]

This patch adds the DT nodes for the uniperif player
IP blocks found on STiH407 family silicon.

Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen@st.com>
Signed-off-by: Peter Griffin <peter.griffin@linaro.org>
---
 arch/arm/boot/dts/stih407-family.dtsi | 76 +++++++++++++++++++++++++++++++++++
 1 file changed, 76 insertions(+)

diff --git a/arch/arm/boot/dts/stih407-family.dtsi b/arch/arm/boot/dts/stih407-family.dtsi
index 3d74bc2..850b180 100644
--- a/arch/arm/boot/dts/stih407-family.dtsi
+++ b/arch/arm/boot/dts/stih407-family.dtsi
@@ -881,5 +881,81 @@
 			status = "disabled";
 			st,syscfg = <&syscfg_core>;
 		};
+
+		sti_uni_player0: sti-uni-player@0 {
+			compatible = "st,sti-uni-player";
+			status = "disabled";
+			#sound-dai-cells = <0>;
+			st,syscfg = <&syscfg_core>;
+			clocks = <&clk_s_d0_flexgen CLK_PCM_0>;
+			assigned-clocks = <&clk_s_d0_quadfs 0>, <&clk_s_d0_flexgen CLK_PCM_0>;
+			assigned-clock-parents = <0>, <&clk_s_d0_quadfs 0>;
+			assigned-clock-rates = <50000000>;
+			reg = <0x8D80000 0x158>;
+			interrupts = <GIC_SPI 84 IRQ_TYPE_NONE>;
+			dmas = <&fdma0 2 0 1>;
+			dai-name = "Uni Player #0 (HDMI)";
+			dma-names = "tx";
+			st,uniperiph-id = <0>;
+			st,version = <5>;
+			st,mode = "HDMI";
+		};
+
+		sti_uni_player1: sti-uni-player@1 {
+			compatible = "st,sti-uni-player";
+			status = "disabled";
+			#sound-dai-cells = <0>;
+			st,syscfg = <&syscfg_core>;
+			clocks = <&clk_s_d0_flexgen CLK_PCM_1>;
+			assigned-clocks = <&clk_s_d0_quadfs 1>, <&clk_s_d0_flexgen CLK_PCM_1>;
+			assigned-clock-parents = <0>, <&clk_s_d0_quadfs 1>;
+			assigned-clock-rates = <50000000>;
+			reg = <0x8D81000 0x158>;
+			interrupts = <GIC_SPI 85 IRQ_TYPE_NONE>;
+			dmas = <&fdma0 3 0 1>;
+			dai-name = "Uni Player #1 (PIO)";
+			dma-names = "tx";
+			st,uniperiph-id = <1>;
+			st,version = <5>;
+			st,mode = "PCM";
+		};
+
+		sti_uni_player2: sti-uni-player@2 {
+			compatible = "st,sti-uni-player";
+			status = "disabled";
+			#sound-dai-cells = <0>;
+			st,syscfg = <&syscfg_core>;
+			clocks = <&clk_s_d0_flexgen CLK_PCM_2>;
+			assigned-clocks = <&clk_s_d0_quadfs 2>, <&clk_s_d0_flexgen CLK_PCM_2>;
+			assigned-clock-parents = <0>, <&clk_s_d0_quadfs 2>;
+			assigned-clock-rates = <50000000>;
+			reg = <0x8D82000 0x158>;
+			interrupts = <GIC_SPI 86 IRQ_TYPE_NONE>;
+			dmas = <&fdma0 4 0 1>;
+			dai-name = "Uni Player #1 (DAC)";
+			dma-names = "tx";
+			st,uniperiph-id = <2>;
+			st,version = <5>;
+			st,mode = "PCM";
+		};
+
+		sti_uni_player3: sti-uni-player@3 {
+			compatible = "st,sti-uni-player";
+			status = "disabled";
+			#sound-dai-cells = <0>;
+			st,syscfg = <&syscfg_core>;
+			clocks = <&clk_s_d0_flexgen CLK_SPDIFF>;
+			assigned-clocks = <&clk_s_d0_quadfs 3>, <&clk_s_d0_flexgen CLK_SPDIFF>;
+			assigned-clock-parents = <0>, <&clk_s_d0_quadfs 3>;
+			assigned-clock-rates = <50000000>;
+			reg = <0x8D85000 0x158>;
+			interrupts = <GIC_SPI 89 IRQ_TYPE_NONE>;
+			dmas = <&fdma0 7 0 1>;
+			dma-names = "tx";
+			dai-name = "Uni Player #1 (PIO)";
+			st,uniperiph-id = <3>;
+			st,version = <5>;
+			st,mode = "SPDIF";
+		};
 	};
 };
-- 
1.9.1

[PATCH v5 17/18] ARM: STi: DT: STiH407: Add uniperif reader dt nodes

[Peter Griffin]

This patch adds the DT node for the uniperif reader
IP block found on STiH407 family silicon.

Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen@st.com>
Signed-off-by: Peter Griffin <peter.griffin@linaro.org>
---
 arch/arm/boot/dts/stih407-family.dtsi | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)

diff --git a/arch/arm/boot/dts/stih407-family.dtsi b/arch/arm/boot/dts/stih407-family.dtsi
index 850b180..a7e6fc3 100644
--- a/arch/arm/boot/dts/stih407-family.dtsi
+++ b/arch/arm/boot/dts/stih407-family.dtsi
@@ -957,5 +957,31 @@
 			st,version = <5>;
 			st,mode = "SPDIF";
 		};
+
+		sti_uni_reader0: sti-uni-reader@0 {
+			compatible = "st,sti-uni-reader";
+			status = "disabled";
+			#sound-dai-cells = <0>;
+			st,syscfg = <&syscfg_core>;
+			reg = <0x8D83000 0x158>;
+			interrupts = <GIC_SPI 87 IRQ_TYPE_NONE>;
+			dmas = <&fdma0 5 0 1>;
+			dma-names = "rx";
+			dai-name = "Uni Reader #0 (PCM IN)";
+			st,version = <3>;
+		};
+
+		sti_uni_reader1: sti-uni-reader@1 {
+			compatible = "st,sti-uni-reader";
+			status = "disabled";
+			#sound-dai-cells = <0>;
+			st,syscfg = <&syscfg_core>;
+			reg = <0x8D84000 0x158>;
+			interrupts = <GIC_SPI 88 IRQ_TYPE_NONE>;
+			dmas = <&fdma0 6 0 1>;
+			dma-names = "rx";
+			dai-name = "Uni Reader #1 (HDMI RX)";
+			st,version = <3>;
+		};
 	};
 };
-- 
1.9.1

[PATCH v5 18/18] ARM: DT: STi: stihxxx-b2120: Add DT nodes for STi audio card

[Peter Griffin]

This patch enables the uniperif players 2 & 3 for b2120 boards
and also adds the "simple-audio-card" device node to interconnect
the SoC sound device and the codec.

Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen@st.com>
Signed-off-by: Peter Griffin <peter.griffin@linaro.org>
---
 arch/arm/boot/dts/stihxxx-b2120.dtsi | 45 ++++++++++++++++++++++++++++++++++++
 1 file changed, 45 insertions(+)

diff --git a/arch/arm/boot/dts/stihxxx-b2120.dtsi b/arch/arm/boot/dts/stihxxx-b2120.dtsi
index 722c63f..1f64bb6 100644
--- a/arch/arm/boot/dts/stihxxx-b2120.dtsi
+++ b/arch/arm/boot/dts/stihxxx-b2120.dtsi
@@ -131,5 +131,50 @@
 				dvb-card	= <STV0367_TDA18212_NIMA_1>;
 			};
 		};
+
+		sti_uni_player2: sti-uni-player@2 {
+			status = "okay";
+		};
+
+		sti_uni_player3: sti-uni-player@3 {
+			status = "okay";
+		};
+
+		sti_sasg_codec: sti-sasg-codec {
+			status = "okay";
+			pinctrl-names = "default";
+			pinctrl-0 = <&pinctrl_spdif_out>;
+		};
+
+		sound {
+			compatible = "simple-audio-card";
+			simple-audio-card,name = "sti audio card";
+			status = "okay";
+
+			simple-audio-card,dai-link@0 {
+				/* DAC */
+				format = "i2s";
+				mclk-fs = <256>;
+				cpu {
+					sound-dai = <&sti_uni_player2>;
+				};
+
+				codec {
+					sound-dai = <&sti_sasg_codec 1>;
+				};
+			};
+			simple-audio-card,dai-link@1 {
+				/* SPDIF */
+				format = "left_j";
+				mclk-fs = <128>;
+				cpu {
+					sound-dai = <&sti_uni_player3>;
+				};
+
+				codec {
+					sound-dai = <&sti_sasg_codec 0>;
+				};
+			};
+		};
 	};
 };
-- 
1.9.1

Re: [PATCH v5 02/18] remoteproc: st_slim_rproc: add a slimcore rproc driver

[kbuild test robot]

[-- Attachment #1: Type: text/plain, Size: 2684 bytes --]

Hi,

[auto build test WARNING on robh/for-next]
[also build test WARNING on v4.7-rc2 next-20160607]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url:    https://github.com/0day-ci/linux/commits/Peter-Griffin/Add-support-for-FDMA-DMA-controller-and-slim-core-rproc-found-on-STi-chipsets/20160608-002710
base:   https://git.kernel.org/pub/scm/linux/kernel/git/robh/linux for-next
config: x86_64-allmodconfig (attached as .config)
compiler: gcc-6 (Debian 6.1.1-1) 6.1.1 20160430
reproduce:
        # save the attached .config to linux build tree
        make ARCH=x86_64 

All warnings (new ones prefixed by >>):

   drivers/remoteproc/st_slim_rproc.c: In function 'slim_rproc_start':
>> drivers/remoteproc/st_slim_rproc.c:137:9: warning: large integer implicitly truncated to unsigned type [-Woverflow]
     writel(~0UL, slim_rproc->peri + SLIM_INT_CLR_OFST);
            ^
   drivers/remoteproc/st_slim_rproc.c:138:9: warning: large integer implicitly truncated to unsigned type [-Woverflow]
     writel(~0UL, slim_rproc->peri + SLIM_CMD_CLR_OFST);
            ^
   drivers/remoteproc/st_slim_rproc.c:141:9: warning: large integer implicitly truncated to unsigned type [-Woverflow]
     writel(~0UL, slim_rproc->peri + SLIM_INT_MASK_OFST);
            ^
   drivers/remoteproc/st_slim_rproc.c:142:9: warning: large integer implicitly truncated to unsigned type [-Woverflow]
     writel(~0UL, slim_rproc->peri + SLIM_CMD_MASK_OFST);
            ^

vim +137 drivers/remoteproc/st_slim_rproc.c

   121			dev_err(dev, "Failed to enable clocks\n");
   122			goto err_clk;
   123		}
   124	
   125		/* disable CPU pipeline clock & reset cpu pipeline */
   126		val = SLIM_CLK_GATE_DIS | SLIM_CLK_GATE_RESET;
   127		writel(val, slim_rproc->slimcore + SLIM_CLK_GATE_OFST);
   128	
   129		/* disable SLIM core STBus sync */
   130		writel(SLIM_STBUS_SYNC_DIS, slim_rproc->peri + SLIM_STBUS_SYNC_OFST);
   131	
   132		/* enable cpu pipeline clock */
   133		writel(!SLIM_CLK_GATE_DIS,
   134			slim_rproc->slimcore + SLIM_CLK_GATE_OFST);
   135	
   136		/* clear int & cmd mailbox */
 > 137		writel(~0UL, slim_rproc->peri + SLIM_INT_CLR_OFST);
   138		writel(~0UL, slim_rproc->peri + SLIM_CMD_CLR_OFST);
   139	
   140		/* enable all channels cmd & int */
   141		writel(~0UL, slim_rproc->peri + SLIM_INT_MASK_OFST);
   142		writel(~0UL, slim_rproc->peri + SLIM_CMD_MASK_OFST);
   143	
   144		/* enable cpu */
   145		writel(SLIM_EN_RUN, slim_rproc->slimcore + SLIM_EN_OFST);

---
0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation

[-- Attachment #2: .config.gz --]
[-- Type: application/octet-stream, Size: 54766 bytes --]

Re: [PATCH v5 01/18] remoteproc: make rsc table support optional

[kbuild test robot]

[-- Attachment #1: Type: text/plain, Size: 12166 bytes --]

Hi,

[auto build test WARNING on robh/for-next]
[also build test WARNING on v4.7-rc2 next-20160607]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url:    https://github.com/0day-ci/linux/commits/Peter-Griffin/Add-support-for-FDMA-DMA-controller-and-slim-core-rproc-found-on-STi-chipsets/20160608-002710
base:   https://git.kernel.org/pub/scm/linux/kernel/git/robh/linux for-next
config: i386-allmodconfig (attached as .config)
compiler: gcc-6 (Debian 6.1.1-1) 6.1.1 20160430
reproduce:
        # save the attached .config to linux build tree
        make ARCH=i386 

Note: it may well be a FALSE warning. FWIW you are at least aware of it now.
http://gcc.gnu.org/wiki/Better_Uninitialized_Warnings

All warnings (new ones prefixed by >>):

   drivers/remoteproc/remoteproc_core.c: In function '__rproc_boot':
>> drivers/remoteproc/remoteproc_core.c:887:20: warning: 'loaded_table' may be used uninitialized in this function [-Wmaybe-uninitialized]
      rproc->table_ptr = loaded_table;
      ~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~
   drivers/remoteproc/remoteproc_core.c:803:33: note: 'loaded_table' was declared here
     struct resource_table *table, *loaded_table;
                                    ^~~~~~~~~~~~
   drivers/remoteproc/remoteproc_core.c: In function 'rproc_trigger_recovery':
>> drivers/remoteproc/remoteproc_core.c:1012:9: warning: 'ret' may be used uninitialized in this function [-Wmaybe-uninitialized]
     return ret;
            ^~~

vim +/loaded_table +887 drivers/remoteproc/remoteproc_core.c

a2b950ac Ohad Ben-Cohen       2013-04-07   881  	/*
a2b950ac Ohad Ben-Cohen       2013-04-07   882  	 * Update table_ptr so that all subsequent vring allocations and
a2b950ac Ohad Ben-Cohen       2013-04-07   883  	 * virtio fields manipulation update the actual loaded resource table
a2b950ac Ohad Ben-Cohen       2013-04-07   884  	 * in device memory.
a2b950ac Ohad Ben-Cohen       2013-04-07   885  	 */
ea76063f Peter Griffin        2016-06-07   886  	if (rproc->has_rsctable)
a2b950ac Ohad Ben-Cohen       2013-04-07  @887  		rproc->table_ptr = loaded_table;
a2b950ac Ohad Ben-Cohen       2013-04-07   888  
400e64df Ohad Ben-Cohen       2011-10-20   889  	rproc->state = RPROC_RUNNING;
400e64df Ohad Ben-Cohen       2011-10-20   890  
400e64df Ohad Ben-Cohen       2011-10-20   891  	dev_info(dev, "remote processor %s is now up\n", rproc->name);
400e64df Ohad Ben-Cohen       2011-10-20   892  
400e64df Ohad Ben-Cohen       2011-10-20   893  	return 0;
400e64df Ohad Ben-Cohen       2011-10-20   894  
400e64df Ohad Ben-Cohen       2011-10-20   895  clean_up:
400e64df Ohad Ben-Cohen       2011-10-20   896  	rproc_resource_cleanup(rproc);
400e64df Ohad Ben-Cohen       2011-10-20   897  	rproc_disable_iommu(rproc);
400e64df Ohad Ben-Cohen       2011-10-20   898  	return ret;
400e64df Ohad Ben-Cohen       2011-10-20   899  }
400e64df Ohad Ben-Cohen       2011-10-20   900  
400e64df Ohad Ben-Cohen       2011-10-20   901  /*
400e64df Ohad Ben-Cohen       2011-10-20   902   * take a firmware and look for virtio devices to register.
400e64df Ohad Ben-Cohen       2011-10-20   903   *
400e64df Ohad Ben-Cohen       2011-10-20   904   * Note: this function is called asynchronously upon registration of the
400e64df Ohad Ben-Cohen       2011-10-20   905   * remote processor (so we must wait until it completes before we try
400e64df Ohad Ben-Cohen       2011-10-20   906   * to unregister the device. one other option is just to use kref here,
400e64df Ohad Ben-Cohen       2011-10-20   907   * that might be cleaner).
400e64df Ohad Ben-Cohen       2011-10-20   908   */
400e64df Ohad Ben-Cohen       2011-10-20   909  static void rproc_fw_config_virtio(const struct firmware *fw, void *context)
400e64df Ohad Ben-Cohen       2011-10-20   910  {
400e64df Ohad Ben-Cohen       2011-10-20   911  	struct rproc *rproc = context;
1e3e2c7c Ohad Ben-Cohen       2012-02-13   912  	struct resource_table *table;
1e3e2c7c Ohad Ben-Cohen       2012-02-13   913  	int ret, tablesz;
400e64df Ohad Ben-Cohen       2011-10-20   914  
400e64df Ohad Ben-Cohen       2011-10-20   915  	if (rproc_fw_sanity_check(rproc, fw) < 0)
400e64df Ohad Ben-Cohen       2011-10-20   916  		goto out;
400e64df Ohad Ben-Cohen       2011-10-20   917  
1e3e2c7c Ohad Ben-Cohen       2012-02-13   918  	/* look for the resource table */
bd484984 Sjur Brændeland      2012-06-19   919  	table = rproc_find_rsc_table(rproc, fw,  &tablesz);
1e3e2c7c Ohad Ben-Cohen       2012-02-13   920  	if (!table)
1e3e2c7c Ohad Ben-Cohen       2012-02-13   921  		goto out;
1e3e2c7c Ohad Ben-Cohen       2012-02-13   922  
a2b950ac Ohad Ben-Cohen       2013-04-07   923  	rproc->table_csum = crc32(0, table, tablesz);
a2b950ac Ohad Ben-Cohen       2013-04-07   924  
a2b950ac Ohad Ben-Cohen       2013-04-07   925  	/*
a2b950ac Ohad Ben-Cohen       2013-04-07   926  	 * Create a copy of the resource table. When a virtio device starts
a2b950ac Ohad Ben-Cohen       2013-04-07   927  	 * and calls vring_new_virtqueue() the address of the allocated vring
a2b950ac Ohad Ben-Cohen       2013-04-07   928  	 * will be stored in the cached_table. Before the device is started,
a2b950ac Ohad Ben-Cohen       2013-04-07   929  	 * cached_table will be copied into devic memory.
a2b950ac Ohad Ben-Cohen       2013-04-07   930  	 */
95cee62c Thomas Meyer         2013-07-01   931  	rproc->cached_table = kmemdup(table, tablesz, GFP_KERNEL);
a2b950ac Ohad Ben-Cohen       2013-04-07   932  	if (!rproc->cached_table)
a2b950ac Ohad Ben-Cohen       2013-04-07   933  		goto out;
a2b950ac Ohad Ben-Cohen       2013-04-07   934  
a2b950ac Ohad Ben-Cohen       2013-04-07   935  	rproc->table_ptr = rproc->cached_table;
a2b950ac Ohad Ben-Cohen       2013-04-07   936  
ba7290e0 Sjur Brændeland      2013-02-21   937  	/* count the number of notify-ids */
ba7290e0 Sjur Brændeland      2013-02-21   938  	rproc->max_notifyid = -1;
172e6ab1 Suman Anna           2015-02-27   939  	ret = rproc_handle_resources(rproc, tablesz,
172e6ab1 Suman Anna           2015-02-27   940  				     rproc_count_vrings_handler);
1e3e2c7c Ohad Ben-Cohen       2012-02-13   941  	if (ret)
400e64df Ohad Ben-Cohen       2011-10-20   942  		goto out;
400e64df Ohad Ben-Cohen       2011-10-20   943  
a2b950ac Ohad Ben-Cohen       2013-04-07   944  	/* look for virtio devices and register them */
a2b950ac Ohad Ben-Cohen       2013-04-07   945  	ret = rproc_handle_resources(rproc, tablesz, rproc_vdev_handler);
a2b950ac Ohad Ben-Cohen       2013-04-07   946  
400e64df Ohad Ben-Cohen       2011-10-20   947  out:
400e64df Ohad Ben-Cohen       2011-10-20   948  	release_firmware(fw);
160e7c84 Ohad Ben-Cohen       2012-07-04   949  	/* allow rproc_del() contexts, if any, to proceed */
400e64df Ohad Ben-Cohen       2011-10-20   950  	complete_all(&rproc->firmware_loading_complete);
400e64df Ohad Ben-Cohen       2011-10-20   951  }
400e64df Ohad Ben-Cohen       2011-10-20   952  
70b85ef8 Fernando Guzman Lugo 2012-08-30   953  static int rproc_add_virtio_devices(struct rproc *rproc)
70b85ef8 Fernando Guzman Lugo 2012-08-30   954  {
70b85ef8 Fernando Guzman Lugo 2012-08-30   955  	int ret;
70b85ef8 Fernando Guzman Lugo 2012-08-30   956  
70b85ef8 Fernando Guzman Lugo 2012-08-30   957  	/* rproc_del() calls must wait until async loader completes */
70b85ef8 Fernando Guzman Lugo 2012-08-30   958  	init_completion(&rproc->firmware_loading_complete);
70b85ef8 Fernando Guzman Lugo 2012-08-30   959  
70b85ef8 Fernando Guzman Lugo 2012-08-30   960  	/*
70b85ef8 Fernando Guzman Lugo 2012-08-30   961  	 * We must retrieve early virtio configuration info from
70b85ef8 Fernando Guzman Lugo 2012-08-30   962  	 * the firmware (e.g. whether to register a virtio device,
70b85ef8 Fernando Guzman Lugo 2012-08-30   963  	 * what virtio features does it support, ...).
70b85ef8 Fernando Guzman Lugo 2012-08-30   964  	 *
70b85ef8 Fernando Guzman Lugo 2012-08-30   965  	 * We're initiating an asynchronous firmware loading, so we can
70b85ef8 Fernando Guzman Lugo 2012-08-30   966  	 * be built-in kernel code, without hanging the boot process.
70b85ef8 Fernando Guzman Lugo 2012-08-30   967  	 */
70b85ef8 Fernando Guzman Lugo 2012-08-30   968  	ret = request_firmware_nowait(THIS_MODULE, FW_ACTION_HOTPLUG,
70b85ef8 Fernando Guzman Lugo 2012-08-30   969  				      rproc->firmware, &rproc->dev, GFP_KERNEL,
70b85ef8 Fernando Guzman Lugo 2012-08-30   970  				      rproc, rproc_fw_config_virtio);
70b85ef8 Fernando Guzman Lugo 2012-08-30   971  	if (ret < 0) {
70b85ef8 Fernando Guzman Lugo 2012-08-30   972  		dev_err(&rproc->dev, "request_firmware_nowait err: %d\n", ret);
70b85ef8 Fernando Guzman Lugo 2012-08-30   973  		complete_all(&rproc->firmware_loading_complete);
70b85ef8 Fernando Guzman Lugo 2012-08-30   974  	}
70b85ef8 Fernando Guzman Lugo 2012-08-30   975  
70b85ef8 Fernando Guzman Lugo 2012-08-30   976  	return ret;
70b85ef8 Fernando Guzman Lugo 2012-08-30   977  }
70b85ef8 Fernando Guzman Lugo 2012-08-30   978  
70b85ef8 Fernando Guzman Lugo 2012-08-30   979  /**
70b85ef8 Fernando Guzman Lugo 2012-08-30   980   * rproc_trigger_recovery() - recover a remoteproc
70b85ef8 Fernando Guzman Lugo 2012-08-30   981   * @rproc: the remote processor
70b85ef8 Fernando Guzman Lugo 2012-08-30   982   *
70b85ef8 Fernando Guzman Lugo 2012-08-30   983   * The recovery is done by reseting all the virtio devices, that way all the
70b85ef8 Fernando Guzman Lugo 2012-08-30   984   * rpmsg drivers will be reseted along with the remote processor making the
70b85ef8 Fernando Guzman Lugo 2012-08-30   985   * remoteproc functional again.
70b85ef8 Fernando Guzman Lugo 2012-08-30   986   *
70b85ef8 Fernando Guzman Lugo 2012-08-30   987   * This function can sleep, so it cannot be called from atomic context.
70b85ef8 Fernando Guzman Lugo 2012-08-30   988   */
70b85ef8 Fernando Guzman Lugo 2012-08-30   989  int rproc_trigger_recovery(struct rproc *rproc)
70b85ef8 Fernando Guzman Lugo 2012-08-30   990  {
70b85ef8 Fernando Guzman Lugo 2012-08-30   991  	struct rproc_vdev *rvdev, *rvtmp;
ea76063f Peter Griffin        2016-06-07   992  	int ret;
70b85ef8 Fernando Guzman Lugo 2012-08-30   993  
70b85ef8 Fernando Guzman Lugo 2012-08-30   994  	dev_err(&rproc->dev, "recovering %s\n", rproc->name);
70b85ef8 Fernando Guzman Lugo 2012-08-30   995  
70b85ef8 Fernando Guzman Lugo 2012-08-30   996  	init_completion(&rproc->crash_comp);
70b85ef8 Fernando Guzman Lugo 2012-08-30   997  
70b85ef8 Fernando Guzman Lugo 2012-08-30   998  	/* clean up remote vdev entries */
70b85ef8 Fernando Guzman Lugo 2012-08-30   999  	list_for_each_entry_safe(rvdev, rvtmp, &rproc->rvdevs, node)
70b85ef8 Fernando Guzman Lugo 2012-08-30  1000  		rproc_remove_virtio_dev(rvdev);
70b85ef8 Fernando Guzman Lugo 2012-08-30  1001  
70b85ef8 Fernando Guzman Lugo 2012-08-30  1002  	/* wait until there is no more rproc users */
70b85ef8 Fernando Guzman Lugo 2012-08-30  1003  	wait_for_completion(&rproc->crash_comp);
70b85ef8 Fernando Guzman Lugo 2012-08-30  1004  
a2b950ac Ohad Ben-Cohen       2013-04-07  1005  	/* Free the copy of the resource table */
a2b950ac Ohad Ben-Cohen       2013-04-07  1006  	kfree(rproc->cached_table);
ea76063f Peter Griffin        2016-06-07  1007  	rproc->cached_table = NULL;
ea76063f Peter Griffin        2016-06-07  1008  
ea76063f Peter Griffin        2016-06-07  1009  	if (rproc->has_rsctable)
ea76063f Peter Griffin        2016-06-07  1010  		ret = rproc_add_virtio_devices(rproc);
a2b950ac Ohad Ben-Cohen       2013-04-07  1011  
ea76063f Peter Griffin        2016-06-07 @1012  	return ret;
70b85ef8 Fernando Guzman Lugo 2012-08-30  1013  }
70b85ef8 Fernando Guzman Lugo 2012-08-30  1014  
400e64df Ohad Ben-Cohen       2011-10-20  1015  /**

:::::: The code at line 887 was first introduced by commit
:::::: a2b950ac7b1e6442919ee9e79c4963e134698869 remoteproc: perserve resource table data

:::::: TO: Ohad Ben-Cohen <ohad@wizery.com>
:::::: CC: Ohad Ben-Cohen <ohad@wizery.com>

---
0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation

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Re: [PATCH v5 01/18] remoteproc: make rsc table support optional

[Bjorn Andersson]

On Tue 07 Jun 09:18 PDT 2016, Peter Griffin wrote:

> Some firmware and rproc drivers such as slim core don't have a
> resource table. To avoid having to fudge an empty table
> in the rproc driver this patch introduces a new has_rsctable
> flag. rproc drivers which don't require a rsc table can set
> this flag to false, and it avoids doing the initial async
> firmware load in rproc_add_virtio_devices() to parse the
> rsc table during rproc_add(), and also optimises rproc_fw_boot()
> code path to avoid unnecessary rsc table processing of an
> empty table.
> 
> Signed-off-by: Peter Griffin <peter.griffin@linaro.org>

Hi Peter,

Thanks for the patch. I do however dislike the amount of conditionals
already in these code paths, so I'm not in favour of adding more.

Please revert back to providing a dummy table from your driver and let's
handle this topic separate of this series.

Regards,
Bjorn