[U-Boot] [PATCH v3 0/7] imx: mxs: Fixes and DM/DTS conversion code for several i.MX28 drivers

[U-Boot] [PATCH v3 0/7] imx: mxs: Fixes and DM/DTS conversion code for several i.MX28 drivers

[Lukasz Majewski]

This patch series focuses on fixing and enhancing the i.MX28 to be
converted to DM/DTS.
The mxs gpio, spi and eMMC drivers have been fixed and converted to DM/DTS.
Some of them also gain support for OF_PLATDATA, when run in constrained
SPL (u-boot.sb).

Applies on -master
SHA1: 448f11f7503995746a7b71e5e3b3a831c4651be9

Travis-CI:
https://travis-ci.org/lmajewski/u-boot-dfu/builds/580944898


Changes in v3:
- Drop following patches from this series (as they are generic,
  non i.MX specific code):
  [U-Boot,v2,8/9] spl: Introduce SPL_DM_GPIO Kconfig define
  [U-Boot,v2,1/9] doc: fix: Replace SPL_OF_PLATDATA with OF_PLATDATA in examples

Changes in v2:
- New patch
- Correct position of struct mmc_ops mxsmmc_ops to avoid build
  breaks on board using legacy i.MX28 mmc driver.
- New patch
- New patch

Lukasz Majewski (7):
  dts: imx28: Remove #include "imx28.dtsi" from imx28-u-boot.dtsi file
  spl: Init proper struct driver member (platdata_auto_alloc_size) for
    mxs_spi
  spi: fix: Call mxs_reset_block() during DM/DTS probe
  spi: Add support for SPL_OF_PLATDATA to mxs_spi.c driver
  mmc: Convert mxsmmc eMMC driver for i.MX2{38} to DM/DTS
  mmc: Replace printf with debug call for timeouts in the i.MX28 mxs
    driver
  spi: Add support for SPL_OF_PLATDATA to mxs_gpio.c driver

 arch/arm/dts/imx28-u-boot.dtsi |   1 -
 drivers/gpio/mxs_gpio.c        |  72 +++++--
 drivers/mmc/mxsmmc.c           | 445 ++++++++++++++++++++++++++++++++++-------
 drivers/spi/mxs_spi.c          |  38 +++-
 4 files changed, 464 insertions(+), 92 deletions(-)

-- 
2.11.0

[U-Boot] [PATCH v3 1/7] dts: imx28: Remove #include "imx28.dtsi" from imx28-u-boot.dtsi file

[Lukasz Majewski]

After this change it is possible to use imx28-<board>-u-boot.dtsi with
the imx28-u-boot.dtsi explicitly included without breaking setup from
imx28-<board>.dts file.

The problem is that the imx28.dtsi included in a wrong place overrides the
changes made in imx28-<board>.dts. As a result some devices are "disabled"
in the final DTB.

Signed-off-by: Lukasz Majewski <lukma@denx.de>
---

Changes in v3: None
Changes in v2: None

 arch/arm/dts/imx28-u-boot.dtsi | 1 -
 1 file changed, 1 deletion(-)

diff --git a/arch/arm/dts/imx28-u-boot.dtsi b/arch/arm/dts/imx28-u-boot.dtsi
index d545b402a7..9db72a6be3 100644
--- a/arch/arm/dts/imx28-u-boot.dtsi
+++ b/arch/arm/dts/imx28-u-boot.dtsi
@@ -5,7 +5,6 @@
  *
  * SPDX-License-Identifier:     GPL-2.0+ or X11
  */
-#include "imx28.dtsi"
 
 &gpio0 {
 	gpio-ranges = <&pinctrl 0 0 29>;
-- 
2.11.0

[U-Boot] [PATCH v3 2/7] spl: Init proper struct driver member (platdata_auto_alloc_size) for mxs_spi

[Lukasz Majewski]

This change initializes proper member of struct driver -
platdata_auto_alloc_size instead of priv_auto_alloc_size, which is setup
twice.

Signed-off-by: Lukasz Majewski <lukma@denx.de>

---

Changes in v3: None
Changes in v2:
- New patch

 drivers/spi/mxs_spi.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/spi/mxs_spi.c b/drivers/spi/mxs_spi.c
index 3a9756fbf1..b1cc83aab1 100644
--- a/drivers/spi/mxs_spi.c
+++ b/drivers/spi/mxs_spi.c
@@ -584,7 +584,7 @@ U_BOOT_DRIVER(mxs_spi) = {
 	.of_match = mxs_spi_ids,
 	.ofdata_to_platdata = mxs_ofdata_to_platdata,
 #endif
-	.priv_auto_alloc_size = sizeof(struct mxs_spi_platdata),
+	.platdata_auto_alloc_size = sizeof(struct mxs_spi_platdata),
 	.ops	= &mxs_spi_ops,
 	.priv_auto_alloc_size = sizeof(struct mxs_spi_priv),
 	.probe	= mxs_spi_probe,
-- 
2.11.0

[U-Boot] [PATCH v3 3/7] spi: fix: Call mxs_reset_block() during DM/DTS probe

[Lukasz Majewski]

Without this change the DM/DTS version of mxs_spi driver doesn't reset the
SPI IP block in probe.
As a result this driver (when used solely on U-Boot proper) relies on reset
performed by mxs spi driver in SPL.

In the use case where eMMC is used in SPL as a boot primary device, the
mxs_reset_block() is not called at all and DM/DTS aware SPI driver in
U-Boot proper is malfunctioning.

Signed-off-by: Lukasz Majewski <lukma@denx.de>
---

Changes in v3: None
Changes in v2: None

 drivers/spi/mxs_spi.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/spi/mxs_spi.c b/drivers/spi/mxs_spi.c
index b1cc83aab1..d475830f17 100644
--- a/drivers/spi/mxs_spi.c
+++ b/drivers/spi/mxs_spi.c
@@ -436,6 +436,8 @@ static int mxs_spi_probe(struct udevice *bus)
 	priv->dma_channel = plat->dma_id;
 	priv->clk_id = plat->clk_id;
 
+	mxs_reset_block(&priv->regs->hw_ssp_ctrl0_reg);
+
 	ret = mxs_dma_init_channel(priv->dma_channel);
 	if (ret) {
 		printf("%s: DMA init channel error %d\n", __func__, ret);
-- 
2.11.0

[U-Boot] [PATCH v3 4/7] spi: Add support for SPL_OF_PLATDATA to mxs_spi.c driver

[Lukasz Majewski]

After this patch the mxs_spi.c DM/DTS driver can be used at early SPL to
read payload from SPI-NOR memories.

It was necessary to adjust its name to 'fsl_imx_2{38}_spi' to match
requirements for SPL_OF_PLATDATA usage.

Signed-off-by: Lukasz Majewski <lukma@denx.de>
---

Changes in v3: None
Changes in v2: None

 drivers/spi/mxs_spi.c | 34 ++++++++++++++++++++++++++++++++--
 1 file changed, 32 insertions(+), 2 deletions(-)

diff --git a/drivers/spi/mxs_spi.c b/drivers/spi/mxs_spi.c
index d475830f17..58b1c67a19 100644
--- a/drivers/spi/mxs_spi.c
+++ b/drivers/spi/mxs_spi.c
@@ -57,7 +57,18 @@ static inline struct mxs_spi_slave *to_mxs_slave(struct spi_slave *slave)
 #else
 #include <dm.h>
 #include <errno.h>
+#include <dt-structs.h>
+
+#ifdef CONFIG_MX28
+#define dtd_fsl_imx_spi dtd_fsl_imx28_spi
+#else /* CONFIG_MX23 */
+#define dtd_fsl_imx_spi dtd_fsl_imx23_spi
+#endif
+
 struct mxs_spi_platdata {
+#if CONFIG_IS_ENABLED(OF_PLATDATA)
+	struct dtd_fsl_imx_spi dtplat;
+#endif
 	s32 frequency;		/* Default clock frequency, -1 for none */
 	fdt_addr_t base;        /* SPI IP block base address */
 	int num_cs;             /* Number of CSes supported */
@@ -430,11 +441,26 @@ static int mxs_spi_probe(struct udevice *bus)
 	int ret;
 
 	debug("%s: probe\n", __func__);
+
+#if CONFIG_IS_ENABLED(OF_PLATDATA)
+	struct dtd_fsl_imx_spi *dtplat = &plat->dtplat;
+	struct phandle_1_arg *p1a = &dtplat->clocks[0];
+
+	priv->regs = (struct mxs_ssp_regs *)dtplat->reg[0];
+	priv->dma_channel = dtplat->dmas[1];
+	priv->clk_id = p1a->arg[0];
+	priv->max_freq = dtplat->spi_max_frequency;
+	plat->num_cs = dtplat->num_cs;
+
+	debug("OF_PLATDATA: regs: 0x%x max freq: %d clkid: %d\n",
+	      (unsigned int)priv->regs, priv->max_freq, priv->clk_id);
+#else
 	priv->regs = (struct mxs_ssp_regs *)plat->base;
 	priv->max_freq = plat->frequency;
 
 	priv->dma_channel = plat->dma_id;
 	priv->clk_id = plat->clk_id;
+#endif
 
 	mxs_reset_block(&priv->regs->hw_ssp_ctrl0_reg);
 
@@ -571,16 +597,20 @@ static int mxs_ofdata_to_platdata(struct udevice *bus)
 
 	return 0;
 }
-#endif
 
 static const struct udevice_id mxs_spi_ids[] = {
 	{ .compatible = "fsl,imx23-spi" },
 	{ .compatible = "fsl,imx28-spi" },
 	{ }
 };
+#endif
 
 U_BOOT_DRIVER(mxs_spi) = {
-	.name	= "mxs_spi",
+#ifdef CONFIG_MX28
+	.name = "fsl_imx28_spi",
+#else /* CONFIG_MX23 */
+	.name = "fsl_imx23_spi",
+#endif
 	.id	= UCLASS_SPI,
 #if CONFIG_IS_ENABLED(OF_CONTROL) && !CONFIG_IS_ENABLED(OF_PLATDATA)
 	.of_match = mxs_spi_ids,
-- 
2.11.0

[U-Boot] [PATCH v3 5/7] mmc: Convert mxsmmc eMMC driver for i.MX2{38} to DM/DTS

[Lukasz Majewski]

This patch converts the mxsmmc driver to support DM/DTS.

Moreover, it is also possible to use it in early SPL with
SPL_OF_PLATDATA enabled.

Signed-off-by: Lukasz Majewski <lukma@denx.de>


---

Changes in v3:
- Drop following patches from this series (as they are generic,
  non i.MX specific code):
  [U-Boot,v2,8/9] spl: Introduce SPL_DM_GPIO Kconfig define
  [U-Boot,v2,1/9] doc: fix: Replace SPL_OF_PLATDATA with OF_PLATDATA in examples

Changes in v2:
- Correct position of struct mmc_ops mxsmmc_ops to avoid build
  breaks on board using legacy i.MX28 mmc driver.

 drivers/mmc/mxsmmc.c | 443 +++++++++++++++++++++++++++++++++++++++++++--------
 1 file changed, 373 insertions(+), 70 deletions(-)

diff --git a/drivers/mmc/mxsmmc.c b/drivers/mmc/mxsmmc.c
index 92db4ae5a6..7ea47f9801 100644
--- a/drivers/mmc/mxsmmc.c
+++ b/drivers/mmc/mxsmmc.c
@@ -2,6 +2,9 @@
 /*
  * Freescale i.MX28 SSP MMC driver
  *
+ * Copyright (C) 2019 DENX Software Engineering
+ * Lukasz Majewski, DENX Software Engineering, lukma at denx.de
+ *
  * Copyright (C) 2011 Marek Vasut <marek.vasut@gmail.com>
  * on behalf of DENX Software Engineering GmbH
  *
@@ -16,6 +19,7 @@
  * (C) Copyright 2003
  * Kyle Harris, Nexus Technologies, Inc. kharris at nexus-tech.net
  */
+
 #include <common.h>
 #include <malloc.h>
 #include <mmc.h>
@@ -27,18 +31,55 @@
 #include <asm/mach-imx/dma.h>
 #include <bouncebuf.h>
 
+#define	MXSMMC_MAX_TIMEOUT	10000
+#define MXSMMC_SMALL_TRANSFER	512
+
+#if !CONFIG_IS_ENABLED(DM_MMC)
 struct mxsmmc_priv {
 	int			id;
-	struct mxs_ssp_regs	*regs;
-	uint32_t		buswidth;
 	int			(*mmc_is_wp)(int);
 	int			(*mmc_cd)(int);
-	struct mxs_dma_desc	*desc;
 	struct mmc_config	cfg;	/* mmc configuration */
+	struct mxs_dma_desc	*desc;
+	uint32_t		buswidth;
+	struct mxs_ssp_regs	*regs;
 };
+#else /* CONFIG_IS_ENABLED(DM_MMC) */
+#include <dm/device.h>
+#include <dm/read.h>
+#include <dt-structs.h>
+
+#ifdef CONFIG_MX28
+#define dtd_fsl_imx_mmc dtd_fsl_imx28_mmc
+#else /* CONFIG_MX23 */
+#define dtd_fsl_imx_mmc dtd_fsl_imx23_mmc
+#endif
 
-#define	MXSMMC_MAX_TIMEOUT	10000
-#define MXSMMC_SMALL_TRANSFER	512
+struct mxsmmc_platdata {
+#if CONFIG_IS_ENABLED(OF_PLATDATA)
+	struct dtd_fsl_imx_mmc dtplat;
+#endif
+	struct mmc_config cfg;
+	struct mmc mmc;
+	fdt_addr_t base;
+	int non_removable;
+	int buswidth;
+	int dma_id;
+	int clk_id;
+};
+
+struct mxsmmc_priv {
+	int clkid;
+	struct mxs_dma_desc	*desc;
+	u32			buswidth;
+	struct mxs_ssp_regs	*regs;
+	unsigned int            dma_channel;
+};
+#endif
+
+#if !CONFIG_IS_ENABLED(DM_MMC)
+static int mxsmmc_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd,
+			   struct mmc_data *data);
 
 static int mxsmmc_cd(struct mxsmmc_priv *priv)
 {
@@ -50,6 +91,132 @@ static int mxsmmc_cd(struct mxsmmc_priv *priv)
 	return !(readl(&ssp_regs->hw_ssp_status) & SSP_STATUS_CARD_DETECT);
 }
 
+static int mxsmmc_set_ios(struct mmc *mmc)
+{
+	struct mxsmmc_priv *priv = mmc->priv;
+	struct mxs_ssp_regs *ssp_regs = priv->regs;
+
+	/* Set the clock speed */
+	if (mmc->clock)
+		mxs_set_ssp_busclock(priv->id, mmc->clock / 1000);
+
+	switch (mmc->bus_width) {
+	case 1:
+		priv->buswidth = SSP_CTRL0_BUS_WIDTH_ONE_BIT;
+		break;
+	case 4:
+		priv->buswidth = SSP_CTRL0_BUS_WIDTH_FOUR_BIT;
+		break;
+	case 8:
+		priv->buswidth = SSP_CTRL0_BUS_WIDTH_EIGHT_BIT;
+		break;
+	}
+
+	/* Set the bus width */
+	clrsetbits_le32(&ssp_regs->hw_ssp_ctrl0,
+			SSP_CTRL0_BUS_WIDTH_MASK, priv->buswidth);
+
+	debug("MMC%d: Set %d bits bus width\n",
+	      mmc->block_dev.devnum, mmc->bus_width);
+
+	return 0;
+}
+
+static int mxsmmc_init(struct mmc *mmc)
+{
+	struct mxsmmc_priv *priv = mmc->priv;
+	struct mxs_ssp_regs *ssp_regs = priv->regs;
+
+	/* Reset SSP */
+	mxs_reset_block(&ssp_regs->hw_ssp_ctrl0_reg);
+
+	/* Reconfigure the SSP block for MMC operation */
+	writel(SSP_CTRL1_SSP_MODE_SD_MMC |
+		SSP_CTRL1_WORD_LENGTH_EIGHT_BITS |
+		SSP_CTRL1_DMA_ENABLE |
+		SSP_CTRL1_POLARITY |
+		SSP_CTRL1_RECV_TIMEOUT_IRQ_EN |
+		SSP_CTRL1_DATA_CRC_IRQ_EN |
+		SSP_CTRL1_DATA_TIMEOUT_IRQ_EN |
+		SSP_CTRL1_RESP_TIMEOUT_IRQ_EN |
+		SSP_CTRL1_RESP_ERR_IRQ_EN,
+		&ssp_regs->hw_ssp_ctrl1_set);
+
+	/* Set initial bit clock 400 KHz */
+	mxs_set_ssp_busclock(priv->id, 400);
+
+	/* Send initial 74 clock cycles (185 us @ 400 KHz)*/
+	writel(SSP_CMD0_CONT_CLKING_EN, &ssp_regs->hw_ssp_cmd0_set);
+	udelay(200);
+	writel(SSP_CMD0_CONT_CLKING_EN, &ssp_regs->hw_ssp_cmd0_clr);
+
+	return 0;
+}
+
+static const struct mmc_ops mxsmmc_ops = {
+	.send_cmd	= mxsmmc_send_cmd,
+	.set_ios	= mxsmmc_set_ios,
+	.init		= mxsmmc_init,
+};
+
+int mxsmmc_initialize(bd_t *bis, int id, int (*wp)(int), int (*cd)(int))
+{
+	struct mmc *mmc = NULL;
+	struct mxsmmc_priv *priv = NULL;
+	int ret;
+	const unsigned int mxsmmc_clk_id = mxs_ssp_clock_by_bus(id);
+
+	if (!mxs_ssp_bus_id_valid(id))
+		return -ENODEV;
+
+	priv = malloc(sizeof(struct mxsmmc_priv));
+	if (!priv)
+		return -ENOMEM;
+
+	priv->desc = mxs_dma_desc_alloc();
+	if (!priv->desc) {
+		free(priv);
+		return -ENOMEM;
+	}
+
+	ret = mxs_dma_init_channel(MXS_DMA_CHANNEL_AHB_APBH_SSP0 + id);
+	if (ret)
+		return ret;
+
+	priv->mmc_is_wp = wp;
+	priv->mmc_cd = cd;
+	priv->id = id;
+	priv->regs = mxs_ssp_regs_by_bus(id);
+
+	priv->cfg.name = "MXS MMC";
+	priv->cfg.ops = &mxsmmc_ops;
+
+	priv->cfg.voltages = MMC_VDD_32_33 | MMC_VDD_33_34;
+
+	priv->cfg.host_caps = MMC_MODE_4BIT | MMC_MODE_8BIT |
+			 MMC_MODE_HS_52MHz | MMC_MODE_HS;
+
+	/*
+	 * SSPCLK = 480 * 18 / 29 / 1 = 297.731 MHz
+	 * SSP bit rate = SSPCLK / (CLOCK_DIVIDE * (1 + CLOCK_RATE)),
+	 * CLOCK_DIVIDE has to be an even value from 2 to 254, and
+	 * CLOCK_RATE could be any integer from 0 to 255.
+	 */
+	priv->cfg.f_min = 400000;
+	priv->cfg.f_max = mxc_get_clock(MXC_SSP0_CLK + mxsmmc_clk_id)
+		* 1000 / 2;
+	priv->cfg.b_max = 0x20;
+
+	mmc = mmc_create(&priv->cfg, priv);
+	if (!mmc) {
+		mxs_dma_desc_free(priv->desc);
+		free(priv);
+		return -ENOMEM;
+	}
+	return 0;
+}
+#endif /* CONFIG_IS_ENABLED(DM_MMC) */
+
 static int mxsmmc_send_cmd_pio(struct mxsmmc_priv *priv, struct mmc_data *data)
 {
 	struct mxs_ssp_regs *ssp_regs = priv->regs;
@@ -115,7 +282,11 @@ static int mxsmmc_send_cmd_dma(struct mxsmmc_priv *priv, struct mmc_data *data)
 	priv->desc->cmd.data |= MXS_DMA_DESC_IRQ | MXS_DMA_DESC_DEC_SEM |
 				(data_count << MXS_DMA_DESC_BYTES_OFFSET);
 
+#if !CONFIG_IS_ENABLED(DM_MMC)
 	dmach = MXS_DMA_CHANNEL_AHB_APBH_SSP0 + priv->id;
+#else
+	dmach = priv->dma_channel;
+#endif
 	mxs_dma_desc_append(dmach, priv->desc);
 	if (mxs_dma_go(dmach)) {
 		bounce_buffer_stop(&bbstate);
@@ -127,6 +298,7 @@ static int mxsmmc_send_cmd_dma(struct mxsmmc_priv *priv, struct mmc_data *data)
 	return 0;
 }
 
+#if !CONFIG_IS_ENABLED(DM_MMC)
 /*
  * Sends a command out on the bus.  Takes the mmc pointer,
  * a command pointer, and an optional data pointer.
@@ -136,12 +308,25 @@ mxsmmc_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd, struct mmc_data *data)
 {
 	struct mxsmmc_priv *priv = mmc->priv;
 	struct mxs_ssp_regs *ssp_regs = priv->regs;
+#else
+static int
+mxsmmc_send_cmd(struct udevice *dev, struct mmc_cmd *cmd, struct mmc_data *data)
+{
+	struct mxsmmc_platdata *plat = dev_get_platdata(dev);
+	struct mxsmmc_priv *priv = dev_get_priv(dev);
+	struct mxs_ssp_regs *ssp_regs = priv->regs;
+	struct mmc *mmc = &plat->mmc;
+#endif
 	uint32_t reg;
 	int timeout;
 	uint32_t ctrl0;
 	int ret;
-
-	debug("MMC%d: CMD%d\n", mmc->block_dev.devnum, cmd->cmdidx);
+#if !CONFIG_IS_ENABLED(DM_MMC)
+	int devnum = mmc->block_dev.devnum;
+#else
+	int devnum = mmc_get_blk_desc(mmc)->devnum;
+#endif
+	debug("MMC%d: CMD%d\n", devnum, cmd->cmdidx);
 
 	/* Check bus busy */
 	timeout = MXSMMC_MAX_TIMEOUT;
@@ -156,16 +341,16 @@ mxsmmc_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd, struct mmc_data *data)
 	}
 
 	if (!timeout) {
-		printf("MMC%d: Bus busy timeout!\n", mmc->block_dev.devnum);
+		printf("MMC%d: Bus busy timeout!\n", devnum);
 		return -ETIMEDOUT;
 	}
-
+#if !CONFIG_IS_ENABLED(DM_MMC)
 	/* See if card is present */
 	if (!mxsmmc_cd(priv)) {
-		printf("MMC%d: No card detected!\n", mmc->block_dev.devnum);
+		printf("MMC%d: No card detected!\n", devnum);
 		return -ENOMEDIUM;
 	}
-
+#endif
 	/* Start building CTRL0 contents */
 	ctrl0 = priv->buswidth;
 
@@ -198,13 +383,13 @@ mxsmmc_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd, struct mmc_data *data)
 		/* READ or WRITE */
 		if (data->flags & MMC_DATA_READ) {
 			ctrl0 |= SSP_CTRL0_READ;
+#if !CONFIG_IS_ENABLED(DM_MMC)
 		} else if (priv->mmc_is_wp &&
-			priv->mmc_is_wp(mmc->block_dev.devnum)) {
-			printf("MMC%d: Can not write a locked card!\n",
-				mmc->block_dev.devnum);
+			priv->mmc_is_wp(devnum)) {
+			printf("MMC%d: Can not write a locked card!\n", devnum);
 			return -EOPNOTSUPP;
+#endif
 		}
-
 		ctrl0 |= SSP_CTRL0_DATA_XFER;
 
 		reg = data->blocksize * data->blocks;
@@ -241,22 +426,21 @@ mxsmmc_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd, struct mmc_data *data)
 	}
 
 	if (!timeout) {
-		printf("MMC%d: Command %d busy\n",
-			mmc->block_dev.devnum, cmd->cmdidx);
+		printf("MMC%d: Command %d busy\n", devnum, cmd->cmdidx);
 		return -ETIMEDOUT;
 	}
 
 	/* Check command timeout */
 	if (reg & SSP_STATUS_RESP_TIMEOUT) {
 		printf("MMC%d: Command %d timeout (status 0x%08x)\n",
-			mmc->block_dev.devnum, cmd->cmdidx, reg);
+		       devnum, cmd->cmdidx, reg);
 		return -ETIMEDOUT;
 	}
 
 	/* Check command errors */
 	if (reg & (SSP_STATUS_RESP_CRC_ERR | SSP_STATUS_RESP_ERR)) {
 		printf("MMC%d: Command %d error (status 0x%08x)!\n",
-			mmc->block_dev.devnum, cmd->cmdidx, reg);
+		       devnum, cmd->cmdidx, reg);
 		return -ECOMM;
 	}
 
@@ -277,15 +461,13 @@ mxsmmc_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd, struct mmc_data *data)
 		ret = mxsmmc_send_cmd_pio(priv, data);
 		if (ret) {
 			printf("MMC%d: Data timeout with command %d "
-				"(status 0x%08x)!\n",
-				mmc->block_dev.devnum, cmd->cmdidx, reg);
+				"(status 0x%08x)!\n", devnum, cmd->cmdidx, reg);
 			return ret;
 		}
 	} else {
 		ret = mxsmmc_send_cmd_dma(priv, data);
 		if (ret) {
-			printf("MMC%d: DMA transfer failed\n",
-				mmc->block_dev.devnum);
+			printf("MMC%d: DMA transfer failed\n", devnum);
 			return ret;
 		}
 	}
@@ -296,21 +478,40 @@ mxsmmc_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd, struct mmc_data *data)
 		(SSP_STATUS_TIMEOUT | SSP_STATUS_DATA_CRC_ERR |
 		SSP_STATUS_FIFO_OVRFLW | SSP_STATUS_FIFO_UNDRFLW)) {
 		printf("MMC%d: Data error with command %d (status 0x%08x)!\n",
-			mmc->block_dev.devnum, cmd->cmdidx, reg);
+		       devnum, cmd->cmdidx, reg);
 		return -ECOMM;
 	}
 
 	return 0;
 }
 
-static int mxsmmc_set_ios(struct mmc *mmc)
+#if CONFIG_IS_ENABLED(DM_MMC)
+/* Base numbers of i.MX2[38] clk for ssp0 IP block */
+#define MXS_SSP_IMX23_CLKID_SSP0 33
+#define MXS_SSP_IMX28_CLKID_SSP0 46
+
+static int mxsmmc_get_cd(struct udevice *dev)
 {
-	struct mxsmmc_priv *priv = mmc->priv;
+	struct mxsmmc_platdata *plat = dev_get_platdata(dev);
+	struct mxsmmc_priv *priv = dev_get_priv(dev);
+	struct mxs_ssp_regs *ssp_regs = priv->regs;
+
+	if (plat->non_removable)
+		return 1;
+
+	return !(readl(&ssp_regs->hw_ssp_status) & SSP_STATUS_CARD_DETECT);
+}
+
+static int mxsmmc_set_ios(struct udevice *dev)
+{
+	struct mxsmmc_platdata *plat = dev_get_platdata(dev);
+	struct mxsmmc_priv *priv = dev_get_priv(dev);
 	struct mxs_ssp_regs *ssp_regs = priv->regs;
+	struct mmc *mmc = &plat->mmc;
 
 	/* Set the clock speed */
 	if (mmc->clock)
-		mxs_set_ssp_busclock(priv->id, mmc->clock / 1000);
+		mxs_set_ssp_busclock(priv->clkid, mmc->clock / 1000);
 
 	switch (mmc->bus_width) {
 	case 1:
@@ -328,15 +529,15 @@ static int mxsmmc_set_ios(struct mmc *mmc)
 	clrsetbits_le32(&ssp_regs->hw_ssp_ctrl0,
 			SSP_CTRL0_BUS_WIDTH_MASK, priv->buswidth);
 
-	debug("MMC%d: Set %d bits bus width\n",
-		mmc->block_dev.devnum, mmc->bus_width);
+	debug("MMC%d: Set %d bits bus width\n", mmc_get_blk_desc(mmc)->devnum,
+	      mmc->bus_width);
 
 	return 0;
 }
 
-static int mxsmmc_init(struct mmc *mmc)
+static int mxsmmc_init(struct udevice *dev)
 {
-	struct mxsmmc_priv *priv = mmc->priv;
+	struct mxsmmc_priv *priv = dev_get_priv(dev);
 	struct mxs_ssp_regs *ssp_regs = priv->regs;
 
 	/* Reset SSP */
@@ -355,7 +556,7 @@ static int mxsmmc_init(struct mmc *mmc)
 		&ssp_regs->hw_ssp_ctrl1_set);
 
 	/* Set initial bit clock 400 KHz */
-	mxs_set_ssp_busclock(priv->id, 400);
+	mxs_set_ssp_busclock(priv->clkid, 400);
 
 	/* Send initial 74 clock cycles (185 us @ 400 KHz)*/
 	writel(SSP_CMD0_CONT_CLKING_EN, &ssp_regs->hw_ssp_cmd0_set);
@@ -365,48 +566,59 @@ static int mxsmmc_init(struct mmc *mmc)
 	return 0;
 }
 
-static const struct mmc_ops mxsmmc_ops = {
-	.send_cmd	= mxsmmc_send_cmd,
-	.set_ios	= mxsmmc_set_ios,
-	.init		= mxsmmc_init,
-};
-
-int mxsmmc_initialize(bd_t *bis, int id, int (*wp)(int), int (*cd)(int))
+static int mxsmmc_probe(struct udevice *dev)
 {
-	struct mmc *mmc = NULL;
-	struct mxsmmc_priv *priv = NULL;
-	int ret;
-	const unsigned int mxsmmc_clk_id = mxs_ssp_clock_by_bus(id);
-
-	if (!mxs_ssp_bus_id_valid(id))
-		return -ENODEV;
+	struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev);
+	struct mxsmmc_platdata *plat = dev_get_platdata(dev);
+	struct mxsmmc_priv *priv = dev_get_priv(dev);
+	struct blk_desc *bdesc;
+	struct mmc *mmc;
+	int ret, clkid;
+
+	debug("%s: probe\n", __func__);
+
+#if CONFIG_IS_ENABLED(OF_PLATDATA)
+	struct dtd_fsl_imx_mmc *dtplat = &plat->dtplat;
+	struct phandle_1_arg *p1a = &dtplat->clocks[0];
+
+	priv->buswidth = dtplat->bus_width;
+	priv->regs = (struct mxs_ssp_regs *)dtplat->reg[0];
+	priv->dma_channel = dtplat->dmas[1];
+	clkid = p1a->arg[0];
+	plat->non_removable = dtplat->non_removable;
+
+	debug("OF_PLATDATA: regs: 0x%p bw: %d clkid: %d non_removable: %d\n",
+	      priv->regs, priv->buswidth, clkid, plat->non_removable);
+#else
+	priv->regs = (struct mxs_ssp_regs *)plat->base;
+	priv->dma_channel = plat->dma_id;
+	clkid = plat->clk_id;
+#endif
 
-	priv = malloc(sizeof(struct mxsmmc_priv));
-	if (!priv)
-		return -ENOMEM;
+#ifdef CONFIG_MX28
+	priv->clkid = clkid - MXS_SSP_IMX28_CLKID_SSP0;
+#else /* CONFIG_MX23 */
+	priv->clkid = clkid - MXS_SSP_IMX23_CLKID_SSP0;
+#endif
+	mmc = &plat->mmc;
+	mmc->cfg = &plat->cfg;
+	mmc->dev = dev;
 
 	priv->desc = mxs_dma_desc_alloc();
 	if (!priv->desc) {
-		free(priv);
+		printf("%s: Cannot allocate DMA descriptor\n", __func__);
 		return -ENOMEM;
 	}
 
-	ret = mxs_dma_init_channel(MXS_DMA_CHANNEL_AHB_APBH_SSP0 + id);
+	ret = mxs_dma_init_channel(priv->dma_channel);
 	if (ret)
 		return ret;
 
-	priv->mmc_is_wp = wp;
-	priv->mmc_cd = cd;
-	priv->id = id;
-	priv->regs = mxs_ssp_regs_by_bus(id);
-
-	priv->cfg.name = "MXS MMC";
-	priv->cfg.ops = &mxsmmc_ops;
+	plat->cfg.name = "MXS MMC";
+	plat->cfg.voltages = MMC_VDD_32_33 | MMC_VDD_33_34;
 
-	priv->cfg.voltages = MMC_VDD_32_33 | MMC_VDD_33_34;
-
-	priv->cfg.host_caps = MMC_MODE_4BIT | MMC_MODE_8BIT |
-			 MMC_MODE_HS_52MHz | MMC_MODE_HS;
+	plat->cfg.host_caps = MMC_MODE_4BIT | MMC_MODE_8BIT |
+		MMC_MODE_HS_52MHz | MMC_MODE_HS;
 
 	/*
 	 * SSPCLK = 480 * 18 / 29 / 1 = 297.731 MHz
@@ -414,15 +626,106 @@ int mxsmmc_initialize(bd_t *bis, int id, int (*wp)(int), int (*cd)(int))
 	 * CLOCK_DIVIDE has to be an even value from 2 to 254, and
 	 * CLOCK_RATE could be any integer from 0 to 255.
 	 */
-	priv->cfg.f_min = 400000;
-	priv->cfg.f_max = mxc_get_clock(MXC_SSP0_CLK + mxsmmc_clk_id) * 1000 / 2;
-	priv->cfg.b_max = 0x20;
+	plat->cfg.f_min = 400000;
+	plat->cfg.f_max = mxc_get_clock(MXC_SSP0_CLK + priv->clkid) * 1000 / 2;
+	plat->cfg.b_max = 0x20;
 
-	mmc = mmc_create(&priv->cfg, priv);
-	if (mmc == NULL) {
-		mxs_dma_desc_free(priv->desc);
-		free(priv);
-		return -ENOMEM;
+	bdesc = mmc_get_blk_desc(mmc);
+	if (!bdesc) {
+		printf("%s: No block device descriptor!\n", __func__);
+		return -ENODEV;
+	}
+
+	if (plat->non_removable)
+		bdesc->removable = 0;
+
+	ret = mxsmmc_init(dev);
+	if (ret)
+		printf("%s: MMC%d init error %d\n", __func__,
+		       bdesc->devnum, ret);
+
+	/* Set the initial clock speed */
+	mmc_set_clock(mmc, 400000, MMC_CLK_ENABLE);
+
+	upriv->mmc = mmc;
+
+	return 0;
+};
+
+#if CONFIG_IS_ENABLED(BLK)
+static int mxsmmc_bind(struct udevice *dev)
+{
+	struct mxsmmc_platdata *plat = dev_get_platdata(dev);
+
+	return mmc_bind(dev, &plat->mmc, &plat->cfg);
+}
+#endif
+
+static const struct dm_mmc_ops mxsmmc_ops = {
+	.get_cd		= mxsmmc_get_cd,
+	.send_cmd	= mxsmmc_send_cmd,
+	.set_ios	= mxsmmc_set_ios,
+};
+
+#if CONFIG_IS_ENABLED(OF_CONTROL) && !CONFIG_IS_ENABLED(OF_PLATDATA)
+static int mxsmmc_ofdata_to_platdata(struct udevice *bus)
+{
+	struct mxsmmc_platdata *plat = bus->platdata;
+	u32 prop[2];
+	int ret;
+
+	plat->base = dev_read_addr(bus);
+	plat->buswidth =
+		dev_read_u32_default(bus, "bus-width", 1);
+	plat->non_removable = dev_read_bool(bus, "non-removable");
+
+	ret = dev_read_u32_array(bus, "dmas", prop, ARRAY_SIZE(prop));
+	if (ret) {
+		printf("%s: Reading 'dmas' property failed!\n", __func__);
+		return ret;
+	}
+	plat->dma_id = prop[1];
+
+	ret = dev_read_u32_array(bus, "clocks", prop, ARRAY_SIZE(prop));
+	if (ret) {
+		printf("%s: Reading 'clocks' property failed!\n", __func__);
+		return ret;
 	}
+	plat->clk_id = prop[1];
+
+	debug("%s: base=0x%x, bus_width=%d %s dma_id=%d clk_id=%d\n",
+	      __func__, (uint)plat->base, plat->buswidth,
+	      plat->non_removable ? "non-removable" : NULL,
+	      plat->dma_id, plat->clk_id);
+
 	return 0;
 }
+
+static const struct udevice_id mxsmmc_ids[] = {
+	{ .compatible = "fsl,imx23-mmc", },
+	{ .compatible = "fsl,imx28-mmc", },
+	{ /* sentinel */ }
+};
+#endif
+
+U_BOOT_DRIVER(mxsmmc) = {
+#ifdef CONFIG_MX28
+	.name = "fsl_imx28_mmc",
+#else /* CONFIG_MX23 */
+	.name = "fsl_imx23_mmc",
+#endif
+	.id	= UCLASS_MMC,
+#if CONFIG_IS_ENABLED(OF_CONTROL) && !CONFIG_IS_ENABLED(OF_PLATDATA)
+	.of_match = mxsmmc_ids,
+	.ofdata_to_platdata = mxsmmc_ofdata_to_platdata,
+#endif
+	.ops	= &mxsmmc_ops,
+#if CONFIG_IS_ENABLED(BLK)
+	.bind	= mxsmmc_bind,
+#endif
+	.probe	= mxsmmc_probe,
+	.priv_auto_alloc_size = sizeof(struct mxsmmc_priv),
+	.platdata_auto_alloc_size = sizeof(struct mxsmmc_platdata),
+};
+
+#endif /* CONFIG_DM_MMC */
-- 
2.11.0

[U-Boot] [PATCH v3 6/7] mmc: Replace printf with debug call for timeouts in the i.MX28 mxs driver

[Lukasz Majewski]

This change replaces printf() with debug() for the notification about
commands timeouts.

This is done on purpose (also other drivers use such approach - dw_mmc.c,
mvebu_mmc.c), as the mmc core code (mmc.c) uses timeouts to assess if one
is using sd card or eMMC device.
In such situation timeout is a some kind of a "normal" behavior and there
shall not be any output to the console.

There is no impact on boot time for boards using this driver (even in SPL)
when two extra timeouts are returned (no SD card present, only eMMC
available).

Boot time tested with grabserial:
sudo grabserial -b 115200 -d /dev/ttyUSB1 -e 30 -t -m "^U-Boot SPL*"

Signed-off-by: Lukasz Majewski <lukma@denx.de>
---

Changes in v3: None
Changes in v2:
- New patch

 drivers/mmc/mxsmmc.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/mmc/mxsmmc.c b/drivers/mmc/mxsmmc.c
index 7ea47f9801..9414eff42b 100644
--- a/drivers/mmc/mxsmmc.c
+++ b/drivers/mmc/mxsmmc.c
@@ -432,8 +432,8 @@ mxsmmc_send_cmd(struct udevice *dev, struct mmc_cmd *cmd, struct mmc_data *data)
 
 	/* Check command timeout */
 	if (reg & SSP_STATUS_RESP_TIMEOUT) {
-		printf("MMC%d: Command %d timeout (status 0x%08x)\n",
-		       devnum, cmd->cmdidx, reg);
+		debug("MMC%d: Command %d timeout (status 0x%08x)\n",
+		      devnum, cmd->cmdidx, reg);
 		return -ETIMEDOUT;
 	}
 
-- 
2.11.0

[U-Boot] [PATCH v3 7/7] spi: Add support for SPL_OF_PLATDATA to mxs_gpio.c driver

[Lukasz Majewski]

After this patch the mxs_gpio.c DM/DTS driver can be used at early SPL to
read states of gpio pins (and for example alter the boot flow).

It was necessary to adjust its name to 'fsl_imx_2{38}_gpio' to match
requirements for SPL_OF_PLATDATA usage.

Signed-off-by: Lukasz Majewski <lukma@denx.de>
---

Changes in v3: None
Changes in v2:
- New patch

 drivers/gpio/mxs_gpio.c | 72 +++++++++++++++++++++++++++++++++++++------------
 1 file changed, 55 insertions(+), 17 deletions(-)

diff --git a/drivers/gpio/mxs_gpio.c b/drivers/gpio/mxs_gpio.c
index b2451fdda8..5795155e3e 100644
--- a/drivers/gpio/mxs_gpio.c
+++ b/drivers/gpio/mxs_gpio.c
@@ -131,9 +131,16 @@ int name_to_gpio(const char *name)
 #else /* CONFIG_DM_GPIO */
 #include <dm.h>
 #include <asm/gpio.h>
+#include <dt-structs.h>
 #include <asm/arch/gpio.h>
 #define MXS_MAX_GPIO_PER_BANK		32
 
+#ifdef CONFIG_MX28
+#define dtd_fsl_imx_gpio dtd_fsl_imx28_gpio
+#else /* CONFIG_MX23 */
+#define dtd_fsl_imx_gpio dtd_fsl_imx23_gpio
+#endif
+
 DECLARE_GLOBAL_DATA_PTR;
 /*
  * According to i.MX28 Reference Manual:
@@ -146,6 +153,14 @@ DECLARE_GLOBAL_DATA_PTR;
  * Bank 4: 0-20 -> 21 PINS
  */
 
+struct mxs_gpio_platdata {
+#if CONFIG_IS_ENABLED(OF_PLATDATA)
+	struct dtd_fsl_imx_gpio dtplat;
+#endif
+	unsigned int bank;
+	int gpio_ranges;
+};
+
 struct mxs_gpio_priv {
 	unsigned int bank;
 };
@@ -223,22 +238,19 @@ static const struct dm_gpio_ops gpio_mxs_ops = {
 
 static int mxs_gpio_probe(struct udevice *dev)
 {
+	struct mxs_gpio_platdata *plat = dev_get_platdata(dev);
 	struct mxs_gpio_priv *priv = dev_get_priv(dev);
 	struct gpio_dev_priv *uc_priv = dev_get_uclass_priv(dev);
-	struct fdtdec_phandle_args args;
-	int node = dev_of_offset(dev);
 	char name[16], *str;
-	fdt_addr_t addr;
-	int ret;
-
-	addr = devfdt_get_addr(dev);
-	if (addr == FDT_ADDR_T_NONE) {
-		printf("%s: No 'reg' property defined!\n", __func__);
-		return -EINVAL;
-	}
-
-	priv->bank = (unsigned int)addr;
 
+#if CONFIG_IS_ENABLED(OF_PLATDATA)
+	struct dtd_fsl_imx_gpio *dtplat = &plat->dtplat;
+	priv->bank = (unsigned int)dtplat->reg[0];
+	uc_priv->gpio_count = dtplat->gpio_ranges[3];
+#else
+	priv->bank = (unsigned int)plat->bank;
+	uc_priv->gpio_count = plat->gpio_ranges;
+#endif
 	snprintf(name, sizeof(name), "GPIO%d_", priv->bank);
 	str = strdup(name);
 	if (!str)
@@ -246,16 +258,33 @@ static int mxs_gpio_probe(struct udevice *dev)
 
 	uc_priv->bank_name = str;
 
+	debug("%s: %s: %d pins base: 0x%x\n", __func__, uc_priv->bank_name,
+	      uc_priv->gpio_count, priv->bank);
+
+	return 0;
+}
+
+#if CONFIG_IS_ENABLED(OF_CONTROL) && !CONFIG_IS_ENABLED(OF_PLATDATA)
+static int mxs_ofdata_to_platdata(struct udevice *dev)
+{
+	struct mxs_gpio_platdata *plat = dev->platdata;
+	struct fdtdec_phandle_args args;
+	int node = dev_of_offset(dev);
+	int ret;
+
+	plat->bank = devfdt_get_addr(dev);
+	if (plat->bank == FDT_ADDR_T_NONE) {
+		printf("%s: No 'reg' property defined!\n", __func__);
+		return -EINVAL;
+	}
+
 	ret = fdtdec_parse_phandle_with_args(gd->fdt_blob, node, "gpio-ranges",
 					     NULL, 3, 0, &args);
 	if (ret)
 		printf("%s: 'gpio-ranges' not defined - using default!\n",
 		       __func__);
 
-	uc_priv->gpio_count = ret == 0 ? args.args[2] : MXS_MAX_GPIO_PER_BANK;
-
-	debug("%s: %s: %d pins\n", __func__, uc_priv->bank_name,
-	      uc_priv->gpio_count);
+	plat->gpio_ranges = ret == 0 ? args.args[2] : MXS_MAX_GPIO_PER_BANK;
 
 	return 0;
 }
@@ -265,13 +294,22 @@ static const struct udevice_id mxs_gpio_ids[] = {
 	{ .compatible = "fsl,imx28-gpio" },
 	{ }
 };
+#endif
 
 U_BOOT_DRIVER(gpio_mxs) = {
-	.name	= "gpio_mxs",
+#ifdef CONFIG_MX28
+	.name = "fsl_imx28_gpio",
+#else /* CONFIG_MX23 */
+	.name = "fsl_imx23_gpio",
+#endif
 	.id	= UCLASS_GPIO,
 	.ops	= &gpio_mxs_ops,
 	.probe	= mxs_gpio_probe,
 	.priv_auto_alloc_size = sizeof(struct mxs_gpio_priv),
+	.platdata_auto_alloc_size = sizeof(struct mxs_gpio_platdata),
+#if CONFIG_IS_ENABLED(OF_CONTROL) && !CONFIG_IS_ENABLED(OF_PLATDATA)
 	.of_match = mxs_gpio_ids,
+	.ofdata_to_platdata = mxs_ofdata_to_platdata,
+#endif
 };
 #endif /* CONFIG_DM_GPIO */
-- 
2.11.0