[PATCH v2 4/4] mmc: sdhci-esdhc-imx: extend card_detect and write_protect support for mx5

[PATCH v2 4/4] mmc: sdhci-esdhc-imx: extend card_detect and write_protect support for mx5

[Shawn Guo]

The patch extends card_detect and write_protect support to get mx5
family and more scenarios supported.  The changes include:

 * Turn platform_data from optional to mandatory
 * Add cd_types and wp_types into platform_data to cover more use
   cases
 * Remove the use of flag ESDHC_FLAG_GPIO_FOR_CD
 * Adjust some machine codes to adopt the platform_data changes

With this patch, card_detect and write_protect gets supported on
mx51_babbage, and other mx5 machines can easily get there with the
least board level configuration added.

Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
---
Changes since v1:
 * Took the suggestion from Arnaud Patard to add default pdata
   in imx_add_sdhci_esdhc_imx(), to avoid touching every single
   board file for the platform_data changes

 arch/arm/mach-imx/eukrea_mbimxsd25-baseboard.c     |    3 +-
 arch/arm/mach-imx/eukrea_mbimxsd35-baseboard.c     |    3 +-
 arch/arm/mach-imx/mach-mx25_3ds.c                  |    2 +
 arch/arm/mach-imx/mach-pcm043.c                    |    2 +
 arch/arm/mach-mx5/board-mx51_babbage.c             |   27 +++++-
 .../plat-mxc/devices/platform-sdhci-esdhc-imx.c    |   12 ++
 arch/arm/plat-mxc/include/mach/esdhc.h             |   25 ++++-
 drivers/mmc/host/sdhci-esdhc-imx.c                 |  115 +++++++++++---------
 8 files changed, 130 insertions(+), 59 deletions(-)

diff --git a/arch/arm/mach-imx/eukrea_mbimxsd25-baseboard.c b/arch/arm/mach-imx/eukrea_mbimxsd25-baseboard.c
index 01ebcb3..66e8726 100644
--- a/arch/arm/mach-imx/eukrea_mbimxsd25-baseboard.c
+++ b/arch/arm/mach-imx/eukrea_mbimxsd25-baseboard.c
@@ -225,7 +225,8 @@ struct imx_ssi_platform_data eukrea_mbimxsd_ssi_pdata __initconst = {
 
 static struct esdhc_platform_data sd1_pdata = {
 	.cd_gpio = GPIO_SD1CD,
-	.wp_gpio = -EINVAL,
+	.cd_type = ESDHC_CD_GPIO,
+	.wp_type = ESDHC_WP_NONE,
 };
 
 /*
diff --git a/arch/arm/mach-imx/eukrea_mbimxsd35-baseboard.c b/arch/arm/mach-imx/eukrea_mbimxsd35-baseboard.c
index 558eb52..0f0af02 100644
--- a/arch/arm/mach-imx/eukrea_mbimxsd35-baseboard.c
+++ b/arch/arm/mach-imx/eukrea_mbimxsd35-baseboard.c
@@ -236,7 +236,8 @@ struct imx_ssi_platform_data eukrea_mbimxsd_ssi_pdata __initconst = {
 
 static struct esdhc_platform_data sd1_pdata = {
 	.cd_gpio = GPIO_SD1CD,
-	.wp_gpio = -EINVAL,
+	.cd_type = ESDHC_CD_GPIO,
+	.wp_type = ESDHC_WP_NONE,
 };
 
 /*
diff --git a/arch/arm/mach-imx/mach-mx25_3ds.c b/arch/arm/mach-imx/mach-mx25_3ds.c
index 01534bb..7f66a91 100644
--- a/arch/arm/mach-imx/mach-mx25_3ds.c
+++ b/arch/arm/mach-imx/mach-mx25_3ds.c
@@ -215,6 +215,8 @@ static const struct imxi2c_platform_data mx25_3ds_i2c0_data __initconst = {
 static const struct esdhc_platform_data mx25pdk_esdhc_pdata __initconst = {
 	.wp_gpio = SD1_GPIO_WP,
 	.cd_gpio = SD1_GPIO_CD,
+	.wp_type = ESDHC_WP_GPIO,
+	.cd_type = ESDHC_CD_GPIO,
 };
 
 static void __init mx25pdk_init(void)
diff --git a/arch/arm/mach-imx/mach-pcm043.c b/arch/arm/mach-imx/mach-pcm043.c
index 163cc31..660ec3e 100644
--- a/arch/arm/mach-imx/mach-pcm043.c
+++ b/arch/arm/mach-imx/mach-pcm043.c
@@ -349,6 +349,8 @@ __setup("otg_mode=", pcm043_otg_mode);
 static struct esdhc_platform_data sd1_pdata = {
 	.wp_gpio = SD1_GPIO_WP,
 	.cd_gpio = SD1_GPIO_CD,
+	.wp_type = ESDHC_WP_GPIO,
+	.cd_type = ESDHC_CD_GPIO,
 };
 
 /*
diff --git a/arch/arm/mach-mx5/board-mx51_babbage.c b/arch/arm/mach-mx5/board-mx51_babbage.c
index e54e4bf..4db6cf9 100644
--- a/arch/arm/mach-mx5/board-mx51_babbage.c
+++ b/arch/arm/mach-mx5/board-mx51_babbage.c
@@ -34,6 +34,8 @@
 #include "devices.h"
 #include "cpu_op-mx51.h"
 
+#define BABBAGE_ESDHC2_WP	IMX_GPIO_NR(1, 5)
+#define BABBAGE_ESDHC2_CD	IMX_GPIO_NR(1, 6)
 #define BABBAGE_USB_HUB_RESET	IMX_GPIO_NR(1, 7)
 #define BABBAGE_USBH1_STP	IMX_GPIO_NR(1, 27)
 #define BABBAGE_USB_PHY_RESET	IMX_GPIO_NR(2, 5)
@@ -142,6 +144,10 @@ static iomux_v3_cfg_t mx51babbage_pads[] = {
 	MX51_PAD_SD1_DATA1__SD1_DATA1,
 	MX51_PAD_SD1_DATA2__SD1_DATA2,
 	MX51_PAD_SD1_DATA3__SD1_DATA3,
+	/* CD signal */
+	MX51_PAD_GPIO1_0__SD1_CD,
+	/* WP signal */
+	MX51_PAD_GPIO1_1__SD1_WP,
 
 	/* SD 2 */
 	MX51_PAD_SD2_CMD__SD2_CMD,
@@ -150,6 +156,11 @@ static iomux_v3_cfg_t mx51babbage_pads[] = {
 	MX51_PAD_SD2_DATA1__SD2_DATA1,
 	MX51_PAD_SD2_DATA2__SD2_DATA2,
 	MX51_PAD_SD2_DATA3__SD2_DATA3,
+	/* WP gpio */
+	MX51_PAD_GPIO1_5__GPIO1_5,
+	/* CD gpio */
+	MX51_PAD_GPIO1_6__GPIO1_6,
+
 
 	/* eCSPI1 */
 	MX51_PAD_CSPI1_MISO__ECSPI1_MISO,
@@ -331,6 +342,18 @@ static const struct spi_imx_master mx51_babbage_spi_pdata __initconst = {
 	.num_chipselect = ARRAY_SIZE(mx51_babbage_spi_cs),
 };
 
+static const struct esdhc_platform_data esdhc1_pdata __initconst = {
+	.wp_type = ESDHC_WP_SIGNAL,
+	.cd_type = ESDHC_CD_SIGNAL,
+};
+
+static const struct esdhc_platform_data esdhc2_pdata __initconst = {
+	.wp_gpio = BABBAGE_ESDHC2_WP,
+	.cd_gpio = BABBAGE_ESDHC2_CD,
+	.wp_type = ESDHC_WP_GPIO,
+	.cd_type = ESDHC_CD_GPIO,
+};
+
 /*
  * Board specific initialization.
  */
@@ -376,8 +399,8 @@ static void __init mx51_babbage_init(void)
 	mxc_iomux_v3_setup_pad(usbh1stp);
 	babbage_usbhub_reset();
 
-	imx51_add_sdhci_esdhc_imx(0, NULL);
-	imx51_add_sdhci_esdhc_imx(1, NULL);
+	imx51_add_sdhci_esdhc_imx(0, &esdhc1_pdata);
+	imx51_add_sdhci_esdhc_imx(1, &esdhc2_pdata);
 
 	spi_register_board_info(mx51_babbage_spi_board_info,
 		ARRAY_SIZE(mx51_babbage_spi_board_info));
diff --git a/arch/arm/plat-mxc/devices/platform-sdhci-esdhc-imx.c b/arch/arm/plat-mxc/devices/platform-sdhci-esdhc-imx.c
index 6b2940b..a880f73 100644
--- a/arch/arm/plat-mxc/devices/platform-sdhci-esdhc-imx.c
+++ b/arch/arm/plat-mxc/devices/platform-sdhci-esdhc-imx.c
@@ -65,6 +65,11 @@ imx53_sdhci_esdhc_imx_data[] __initconst = {
 };
 #endif /* ifdef CONFIG_SOC_IMX53 */
 
+static const struct esdhc_platform_data default_esdhc_pdata __initconst = {
+	.wp_type = ESDHC_WP_NONE,
+	.cd_type = ESDHC_CD_NONE,
+};
+
 struct platform_device *__init imx_add_sdhci_esdhc_imx(
 		const struct imx_sdhci_esdhc_imx_data *data,
 		const struct esdhc_platform_data *pdata)
@@ -81,6 +86,13 @@ struct platform_device *__init imx_add_sdhci_esdhc_imx(
 		},
 	};
 
+	/*
+	 * If machine does not provide a pdata, use the default one
+	 * which means none WP/CD support
+	 */
+	if (!pdata)
+		pdata = &default_esdhc_pdata;
+
 	return imx_add_platform_device("sdhci-esdhc-imx", data->id, res,
 			ARRAY_SIZE(res), pdata, sizeof(*pdata));
 }
diff --git a/arch/arm/plat-mxc/include/mach/esdhc.h b/arch/arm/plat-mxc/include/mach/esdhc.h
index 86003f4..fced348 100644
--- a/arch/arm/plat-mxc/include/mach/esdhc.h
+++ b/arch/arm/plat-mxc/include/mach/esdhc.h
@@ -10,17 +10,32 @@
 #ifndef __ASM_ARCH_IMX_ESDHC_H
 #define __ASM_ARCH_IMX_ESDHC_H
 
+enum wp_types {
+	ESDHC_WP_NONE,		/* no WP, neither signal nor gpio */
+	ESDHC_WP_SIGNAL,	/* mmc internal WP signal */
+	ESDHC_WP_GPIO,		/* external gpio pin for WP */
+};
+
+enum cd_types {
+	ESDHC_CD_NONE,		/* no CD, neither signal nor gpio */
+	ESDHC_CD_SIGNAL,	/* mmc internal CD signal */
+	ESDHC_CD_GPIO,		/* external gpio pin for CD */
+	ESDHC_CD_PERMANENT,	/* no CD, card permanently wired to host */
+};
+
 /**
- * struct esdhc_platform_data - optional platform data for esdhc on i.MX
- *
- * strongly recommended for i.MX25/35, not needed for other variants
+ * struct esdhc_platform_data - platform data for esdhc on i.MX
  *
- * @wp_gpio:	gpio for write_protect (-EINVAL if unused)
- * @cd_gpio:	gpio for card_detect interrupt (-EINVAL if unused)
+ * @wp_gpio:	gpio for write_protect
+ * @cd_gpio:	gpio for card_detect interrupt
+ * @wp_type:	type of write_protect method (see wp_types enum above)
+ * @cd_type:	type of card_detect method (see cd_types enum above)
  */
 
 struct esdhc_platform_data {
 	unsigned int wp_gpio;
 	unsigned int cd_gpio;
+	enum wp_types wp_type;
+	enum cd_types cd_type;
 };
 #endif /* __ASM_ARCH_IMX_ESDHC_H */
diff --git a/drivers/mmc/host/sdhci-esdhc-imx.c b/drivers/mmc/host/sdhci-esdhc-imx.c
index 79b7a9a..9cba6eb 100644
--- a/drivers/mmc/host/sdhci-esdhc-imx.c
+++ b/drivers/mmc/host/sdhci-esdhc-imx.c
@@ -29,7 +29,6 @@
 #define SDHCI_VENDOR_SPEC		0xC0
 #define  SDHCI_VENDOR_SPEC_SDIO_QUIRK	0x00000002
 
-#define ESDHC_FLAG_GPIO_FOR_CD		(1 << 0)
 /*
  * The CMDTYPE of the CMD register (offset 0xE) should be set to
  * "11" when the STOP CMD12 is issued on imx53 to abort one
@@ -70,19 +69,15 @@ static inline void esdhc_clrset_le(struct sdhci_host *host, u32 mask, u32 val, i
 
 static u32 esdhc_readl_le(struct sdhci_host *host, int reg)
 {
-	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
-	struct pltfm_imx_data *imx_data = pltfm_host->priv;
+	struct esdhc_platform_data *boarddata =
+			host->mmc->parent->platform_data;
 
-	/* fake CARD_PRESENT flag on mx25/35 */
+	/* fake CARD_PRESENT flag */
 	u32 val = readl(host->ioaddr + reg);
 
 	if (unlikely((reg == SDHCI_PRESENT_STATE)
-			&& (imx_data->flags & ESDHC_FLAG_GPIO_FOR_CD))) {
-		struct esdhc_platform_data *boarddata =
-				host->mmc->parent->platform_data;
-
-		if (boarddata && gpio_is_valid(boarddata->cd_gpio)
-				&& gpio_get_value(boarddata->cd_gpio))
+			&& gpio_is_valid(boarddata->cd_gpio))) {
+		if (gpio_get_value(boarddata->cd_gpio))
 			/* no card, if a valid gpio says so... */
 			val &= ~SDHCI_CARD_PRESENT;
 		else
@@ -97,12 +92,13 @@ static void esdhc_writel_le(struct sdhci_host *host, u32 val, int reg)
 {
 	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
 	struct pltfm_imx_data *imx_data = pltfm_host->priv;
+	struct esdhc_platform_data *boarddata =
+			host->mmc->parent->platform_data;
 
 	if (unlikely((reg == SDHCI_INT_ENABLE || reg == SDHCI_SIGNAL_ENABLE)
-			&& (imx_data->flags & ESDHC_FLAG_GPIO_FOR_CD)))
+			&& (boarddata->cd_type == ESDHC_CD_GPIO)))
 		/*
 		 * these interrupts won't work with a custom card_detect gpio
-		 * (only applied to mx25/35)
 		 */
 		val &= ~(SDHCI_INT_CARD_REMOVE | SDHCI_INT_CARD_INSERT);
 
@@ -201,6 +197,18 @@ static unsigned int esdhc_pltfm_get_min_clock(struct sdhci_host *host)
 	return clk_get_rate(pltfm_host->clk) / 256 / 16;
 }
 
+static unsigned int esdhc_pltfm_get_ro(struct sdhci_host *host)
+{
+	struct esdhc_platform_data *boarddata =
+			host->mmc->parent->platform_data;
+
+	if (gpio_is_valid(boarddata->wp_gpio))
+		return gpio_get_value(boarddata->wp_gpio);
+	else
+		return !(readl(host->ioaddr + SDHCI_PRESENT_STATE) &
+				SDHCI_WRITE_PROTECT);
+}
+
 static struct sdhci_ops sdhci_esdhc_ops = {
 	.read_l = esdhc_readl_le,
 	.read_w = esdhc_readw_le,
@@ -212,6 +220,7 @@ static struct sdhci_ops sdhci_esdhc_ops = {
 	.get_min_clock = esdhc_pltfm_get_min_clock,
 	.get_max_blk_size = esdhc_pltfm_get_max_blk_size,
 	.get_max_blk_count = esdhc_pltfm_get_max_blk_count,
+	.get_ro = esdhc_pltfm_get_ro,
 };
 
 static struct sdhci_pltfm_data sdhci_esdhc_imx_pdata = {
@@ -221,17 +230,6 @@ static struct sdhci_pltfm_data sdhci_esdhc_imx_pdata = {
 	.ops = &sdhci_esdhc_ops,
 };
 
-static unsigned int esdhc_pltfm_get_ro(struct sdhci_host *host)
-{
-	struct esdhc_platform_data *boarddata =
-			host->mmc->parent->platform_data;
-
-	if (boarddata && gpio_is_valid(boarddata->wp_gpio))
-		return gpio_get_value(boarddata->wp_gpio);
-	else
-		return -ENOSYS;
-}
-
 static irqreturn_t cd_irq(int irq, void *data)
 {
 	struct sdhci_host *sdhost = (struct sdhci_host *)data;
@@ -272,23 +270,33 @@ static int __devinit sdhci_esdhc_imx_probe(struct platform_device *pdev)
 	if (!cpu_is_mx25())
 		host->quirks |= SDHCI_QUIRK_BROKEN_TIMEOUT_VAL;
 
-	if (cpu_is_mx25() || cpu_is_mx35()) {
-		/* write_protect can't be routed to controller, use gpio */
-		sdhci_esdhc_ops.get_ro = esdhc_pltfm_get_ro;
-	}
-
 	if (!(cpu_is_mx25() || cpu_is_mx35() || cpu_is_mx51()))
 		imx_data->flags |= ESDHC_FLAG_MULTIBLK_NO_INT;
 
 	boarddata = host->mmc->parent->platform_data;
-	if (boarddata) {
+	if (!boarddata) {
+		dev_err(mmc_dev(host->mmc), "no board data!\n");
+		err = -EINVAL;
+		goto no_board_data;
+	}
+
+	/* write_protect */
+	if (boarddata->wp_type == ESDHC_WP_GPIO) {
 		err = gpio_request_one(boarddata->wp_gpio, GPIOF_IN, "ESDHC_WP");
 		if (err) {
 			dev_warn(mmc_dev(host->mmc),
-				"no write-protect pin available!\n");
-			boarddata->wp_gpio = err;
+				 "no write-protect pin available!\n");
+			boarddata->wp_gpio = -EINVAL;
 		}
+	} else
+		boarddata->wp_gpio = -EINVAL;
 
+	/* card_detect */
+	if (boarddata->cd_type != ESDHC_CD_GPIO)
+		boarddata->cd_gpio = -EINVAL;
+
+	switch (boarddata->cd_type) {
+	case ESDHC_CD_GPIO:
 		err = gpio_request_one(boarddata->cd_gpio, GPIOF_IN, "ESDHC_CD");
 		if (err) {
 			dev_warn(mmc_dev(host->mmc),
@@ -296,10 +304,6 @@ static int __devinit sdhci_esdhc_imx_probe(struct platform_device *pdev)
 			goto no_card_detect_pin;
 		}
 
-		/* i.MX5x has issues to be researched */
-		if (!cpu_is_mx25() && !cpu_is_mx35())
-			goto not_supported;
-
 		err = request_irq(gpio_to_irq(boarddata->cd_gpio), cd_irq,
 				 IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING,
 				 mmc_hostname(host->mmc), host);
@@ -307,10 +311,19 @@ static int __devinit sdhci_esdhc_imx_probe(struct platform_device *pdev)
 			dev_warn(mmc_dev(host->mmc), "request irq error\n");
 			goto no_card_detect_irq;
 		}
+		/* fall through */
 
-		imx_data->flags |= ESDHC_FLAG_GPIO_FOR_CD;
-		/* Now we have a working card_detect again */
+	case ESDHC_CD_SIGNAL:
+		/* we have a working card_detect back */
 		host->quirks &= ~SDHCI_QUIRK_BROKEN_CARD_DETECTION;
+		break;
+
+	case ESDHC_CD_PERMANENT:
+		host->mmc->caps = MMC_CAP_NONREMOVABLE;
+		break;
+
+	case ESDHC_CD_NONE:
+		break;
 	}
 
 	err = sdhci_add_host(host);
@@ -319,16 +332,20 @@ static int __devinit sdhci_esdhc_imx_probe(struct platform_device *pdev)
 
 	return 0;
 
- no_card_detect_irq:
-	gpio_free(boarddata->cd_gpio);
- no_card_detect_pin:
-	boarddata->cd_gpio = err;
- not_supported:
-	kfree(imx_data);
- err_add_host:
+err_add_host:
+	if (gpio_is_valid(boarddata->cd_gpio))
+		free_irq(gpio_to_irq(boarddata->cd_gpio), host);
+no_card_detect_irq:
+	if (gpio_is_valid(boarddata->cd_gpio))
+		gpio_free(boarddata->cd_gpio);
+	if (gpio_is_valid(boarddata->wp_gpio))
+		gpio_free(boarddata->wp_gpio);
+no_card_detect_pin:
+no_board_data:
 	clk_disable(pltfm_host->clk);
 	clk_put(pltfm_host->clk);
- err_clk_get:
+err_clk_get:
+	kfree(imx_data);
 	sdhci_pltfm_free(pdev);
 	return err;
 }
@@ -343,14 +360,12 @@ static int __devexit sdhci_esdhc_imx_remove(struct platform_device *pdev)
 
 	sdhci_remove_host(host, dead);
 
-	if (boarddata && gpio_is_valid(boarddata->wp_gpio))
+	if (gpio_is_valid(boarddata->wp_gpio))
 		gpio_free(boarddata->wp_gpio);
 
-	if (boarddata && gpio_is_valid(boarddata->cd_gpio)) {
+	if (gpio_is_valid(boarddata->cd_gpio)) {
+		free_irq(gpio_to_irq(boarddata->cd_gpio), host);
 		gpio_free(boarddata->cd_gpio);
-
-		if (!(host->quirks & SDHCI_QUIRK_BROKEN_CARD_DETECTION))
-			free_irq(gpio_to_irq(boarddata->cd_gpio), host);
 	}
 
 	clk_disable(pltfm_host->clk);
-- 
1.7.4.1

[PATCH v2 4/4] mmc: sdhci-esdhc-imx: extend card_detect and write_protect support for mx5

[Wolfram Sang]

On Tue, Jun 14, 2011 at 02:47:39PM +0800, Shawn Guo wrote:
> The patch extends card_detect and write_protect support to get mx5
> family and more scenarios supported.  The changes include:
> 
>  * Turn platform_data from optional to mandatory
>  * Add cd_types and wp_types into platform_data to cover more use
>    cases
>  * Remove the use of flag ESDHC_FLAG_GPIO_FOR_CD
>  * Adjust some machine codes to adopt the platform_data changes
> 
> With this patch, card_detect and write_protect gets supported on
> mx51_babbage, and other mx5 machines can easily get there with the
> least board level configuration added.
> 
> Signed-off-by: Shawn Guo <shawn.guo@linaro.org>

No time for a full review, but it looks a lot like going into the right
direction. Thanks.

A few comments:

> ---
> Changes since v1:
>  * Took the suggestion from Arnaud Patard to add default pdata
>    in imx_add_sdhci_esdhc_imx(), to avoid touching every single
>    board file for the platform_data changes
> 
>  arch/arm/mach-imx/eukrea_mbimxsd25-baseboard.c     |    3 +-
>  arch/arm/mach-imx/eukrea_mbimxsd35-baseboard.c     |    3 +-
>  arch/arm/mach-imx/mach-mx25_3ds.c                  |    2 +
>  arch/arm/mach-imx/mach-pcm043.c                    |    2 +
>  arch/arm/mach-mx5/board-mx51_babbage.c             |   27 +++++-
>  .../plat-mxc/devices/platform-sdhci-esdhc-imx.c    |   12 ++
>  arch/arm/plat-mxc/include/mach/esdhc.h             |   25 ++++-
>  drivers/mmc/host/sdhci-esdhc-imx.c                 |  115 +++++++++++---------
>  8 files changed, 130 insertions(+), 59 deletions(-)
> 
> diff --git a/arch/arm/mach-imx/eukrea_mbimxsd25-baseboard.c b/arch/arm/mach-imx/eukrea_mbimxsd25-baseboard.c
> index 01ebcb3..66e8726 100644
> --- a/arch/arm/mach-imx/eukrea_mbimxsd25-baseboard.c
> +++ b/arch/arm/mach-imx/eukrea_mbimxsd25-baseboard.c
> @@ -225,7 +225,8 @@ struct imx_ssi_platform_data eukrea_mbimxsd_ssi_pdata __initconst = {
>  
>  static struct esdhc_platform_data sd1_pdata = {
>  	.cd_gpio = GPIO_SD1CD,
> -	.wp_gpio = -EINVAL,
> +	.cd_type = ESDHC_CD_GPIO,
> +	.wp_type = ESDHC_WP_NONE,
>  };
>  
>  /*
> diff --git a/arch/arm/mach-imx/eukrea_mbimxsd35-baseboard.c b/arch/arm/mach-imx/eukrea_mbimxsd35-baseboard.c
> index 558eb52..0f0af02 100644
> --- a/arch/arm/mach-imx/eukrea_mbimxsd35-baseboard.c
> +++ b/arch/arm/mach-imx/eukrea_mbimxsd35-baseboard.c
> @@ -236,7 +236,8 @@ struct imx_ssi_platform_data eukrea_mbimxsd_ssi_pdata __initconst = {
>  
>  static struct esdhc_platform_data sd1_pdata = {
>  	.cd_gpio = GPIO_SD1CD,
> -	.wp_gpio = -EINVAL,
> +	.cd_type = ESDHC_CD_GPIO,
> +	.wp_type = ESDHC_WP_NONE,
>  };
>  
>  /*
> diff --git a/arch/arm/mach-imx/mach-mx25_3ds.c b/arch/arm/mach-imx/mach-mx25_3ds.c
> index 01534bb..7f66a91 100644
> --- a/arch/arm/mach-imx/mach-mx25_3ds.c
> +++ b/arch/arm/mach-imx/mach-mx25_3ds.c
> @@ -215,6 +215,8 @@ static const struct imxi2c_platform_data mx25_3ds_i2c0_data __initconst = {
>  static const struct esdhc_platform_data mx25pdk_esdhc_pdata __initconst = {
>  	.wp_gpio = SD1_GPIO_WP,
>  	.cd_gpio = SD1_GPIO_CD,
> +	.wp_type = ESDHC_WP_GPIO,
> +	.cd_type = ESDHC_CD_GPIO,
>  };
>  
>  static void __init mx25pdk_init(void)
> diff --git a/arch/arm/mach-imx/mach-pcm043.c b/arch/arm/mach-imx/mach-pcm043.c
> index 163cc31..660ec3e 100644
> --- a/arch/arm/mach-imx/mach-pcm043.c
> +++ b/arch/arm/mach-imx/mach-pcm043.c
> @@ -349,6 +349,8 @@ __setup("otg_mode=", pcm043_otg_mode);
>  static struct esdhc_platform_data sd1_pdata = {
>  	.wp_gpio = SD1_GPIO_WP,
>  	.cd_gpio = SD1_GPIO_CD,
> +	.wp_type = ESDHC_WP_GPIO,
> +	.cd_type = ESDHC_CD_GPIO,
>  };
>  
>  /*
> diff --git a/arch/arm/mach-mx5/board-mx51_babbage.c b/arch/arm/mach-mx5/board-mx51_babbage.c
> index e54e4bf..4db6cf9 100644
> --- a/arch/arm/mach-mx5/board-mx51_babbage.c
> +++ b/arch/arm/mach-mx5/board-mx51_babbage.c
> @@ -34,6 +34,8 @@
>  #include "devices.h"
>  #include "cpu_op-mx51.h"
>  
> +#define BABBAGE_ESDHC2_WP	IMX_GPIO_NR(1, 5)
> +#define BABBAGE_ESDHC2_CD	IMX_GPIO_NR(1, 6)
>  #define BABBAGE_USB_HUB_RESET	IMX_GPIO_NR(1, 7)
>  #define BABBAGE_USBH1_STP	IMX_GPIO_NR(1, 27)
>  #define BABBAGE_USB_PHY_RESET	IMX_GPIO_NR(2, 5)
> @@ -142,6 +144,10 @@ static iomux_v3_cfg_t mx51babbage_pads[] = {
>  	MX51_PAD_SD1_DATA1__SD1_DATA1,
>  	MX51_PAD_SD1_DATA2__SD1_DATA2,
>  	MX51_PAD_SD1_DATA3__SD1_DATA3,
> +	/* CD signal */
> +	MX51_PAD_GPIO1_0__SD1_CD,
> +	/* WP signal */
> +	MX51_PAD_GPIO1_1__SD1_WP,
>  
>  	/* SD 2 */
>  	MX51_PAD_SD2_CMD__SD2_CMD,
> @@ -150,6 +156,11 @@ static iomux_v3_cfg_t mx51babbage_pads[] = {
>  	MX51_PAD_SD2_DATA1__SD2_DATA1,
>  	MX51_PAD_SD2_DATA2__SD2_DATA2,
>  	MX51_PAD_SD2_DATA3__SD2_DATA3,
> +	/* WP gpio */
> +	MX51_PAD_GPIO1_5__GPIO1_5,
> +	/* CD gpio */
> +	MX51_PAD_GPIO1_6__GPIO1_6,
> +
>  
>  	/* eCSPI1 */
>  	MX51_PAD_CSPI1_MISO__ECSPI1_MISO,
> @@ -331,6 +342,18 @@ static const struct spi_imx_master mx51_babbage_spi_pdata __initconst = {
>  	.num_chipselect = ARRAY_SIZE(mx51_babbage_spi_cs),
>  };
>  
> +static const struct esdhc_platform_data esdhc1_pdata __initconst = {
> +	.wp_type = ESDHC_WP_SIGNAL,
> +	.cd_type = ESDHC_CD_SIGNAL,
> +};
> +
> +static const struct esdhc_platform_data esdhc2_pdata __initconst = {
> +	.wp_gpio = BABBAGE_ESDHC2_WP,
> +	.cd_gpio = BABBAGE_ESDHC2_CD,
> +	.wp_type = ESDHC_WP_GPIO,
> +	.cd_type = ESDHC_CD_GPIO,
> +};
> +
>  /*
>   * Board specific initialization.
>   */
> @@ -376,8 +399,8 @@ static void __init mx51_babbage_init(void)
>  	mxc_iomux_v3_setup_pad(usbh1stp);
>  	babbage_usbhub_reset();
>  
> -	imx51_add_sdhci_esdhc_imx(0, NULL);
> -	imx51_add_sdhci_esdhc_imx(1, NULL);
> +	imx51_add_sdhci_esdhc_imx(0, &esdhc1_pdata);
> +	imx51_add_sdhci_esdhc_imx(1, &esdhc2_pdata);
>  
>  	spi_register_board_info(mx51_babbage_spi_board_info,
>  		ARRAY_SIZE(mx51_babbage_spi_board_info));
> diff --git a/arch/arm/plat-mxc/devices/platform-sdhci-esdhc-imx.c b/arch/arm/plat-mxc/devices/platform-sdhci-esdhc-imx.c
> index 6b2940b..a880f73 100644
> --- a/arch/arm/plat-mxc/devices/platform-sdhci-esdhc-imx.c
> +++ b/arch/arm/plat-mxc/devices/platform-sdhci-esdhc-imx.c
> @@ -65,6 +65,11 @@ imx53_sdhci_esdhc_imx_data[] __initconst = {
>  };
>  #endif /* ifdef CONFIG_SOC_IMX53 */
>  
> +static const struct esdhc_platform_data default_esdhc_pdata __initconst = {
> +	.wp_type = ESDHC_WP_NONE,
> +	.cd_type = ESDHC_CD_NONE,
> +};
> +
>  struct platform_device *__init imx_add_sdhci_esdhc_imx(
>  		const struct imx_sdhci_esdhc_imx_data *data,
>  		const struct esdhc_platform_data *pdata)
> @@ -81,6 +86,13 @@ struct platform_device *__init imx_add_sdhci_esdhc_imx(
>  		},
>  	};
>  
> +	/*
> +	 * If machine does not provide a pdata, use the default one

s/a pdata/pdata/ (not 100% sure, though)

> +	 * which means none WP/CD support

s/none/no/

> +	 */
> +	if (!pdata)
> +		pdata = &default_esdhc_pdata;
> +
>  	return imx_add_platform_device("sdhci-esdhc-imx", data->id, res,
>  			ARRAY_SIZE(res), pdata, sizeof(*pdata));
>  }
> diff --git a/arch/arm/plat-mxc/include/mach/esdhc.h b/arch/arm/plat-mxc/include/mach/esdhc.h
> index 86003f4..fced348 100644
> --- a/arch/arm/plat-mxc/include/mach/esdhc.h
> +++ b/arch/arm/plat-mxc/include/mach/esdhc.h
> @@ -10,17 +10,32 @@
>  #ifndef __ASM_ARCH_IMX_ESDHC_H
>  #define __ASM_ARCH_IMX_ESDHC_H
>  
> +enum wp_types {
> +	ESDHC_WP_NONE,		/* no WP, neither signal nor gpio */
> +	ESDHC_WP_SIGNAL,	/* mmc internal WP signal */

I think SIGNAL is not descriptive enough. Maybe

ESDHC_WP_INTERNAL		/* WP routed directly to mmc controller */

? It should be mentioned on which SoCs this is not available?

> +	ESDHC_WP_GPIO,		/* external gpio pin for WP */
> +};
> +
> +enum cd_types {
> +	ESDHC_CD_NONE,		/* no CD, neither signal nor gpio */
> +	ESDHC_CD_SIGNAL,	/* mmc internal CD signal */

ditto

> +	ESDHC_CD_GPIO,		/* external gpio pin for CD */
> +	ESDHC_CD_PERMANENT,	/* no CD, card permanently wired to host */
> +};
> +
>  /**
> - * struct esdhc_platform_data - optional platform data for esdhc on i.MX
> - *
> - * strongly recommended for i.MX25/35, not needed for other variants
> + * struct esdhc_platform_data - platform data for esdhc on i.MX
>   *
> - * @wp_gpio:	gpio for write_protect (-EINVAL if unused)
> - * @cd_gpio:	gpio for card_detect interrupt (-EINVAL if unused)
> + * @wp_gpio:	gpio for write_protect
> + * @cd_gpio:	gpio for card_detect interrupt
> + * @wp_type:	type of write_protect method (see wp_types enum above)
> + * @cd_type:	type of card_detect method (see cd_types enum above)
>   */
>  
>  struct esdhc_platform_data {
>  	unsigned int wp_gpio;
>  	unsigned int cd_gpio;
> +	enum wp_types wp_type;
> +	enum cd_types cd_type;
>  };
>  #endif /* __ASM_ARCH_IMX_ESDHC_H */
> diff --git a/drivers/mmc/host/sdhci-esdhc-imx.c b/drivers/mmc/host/sdhci-esdhc-imx.c
> index 79b7a9a..9cba6eb 100644
> --- a/drivers/mmc/host/sdhci-esdhc-imx.c
> +++ b/drivers/mmc/host/sdhci-esdhc-imx.c
> @@ -29,7 +29,6 @@
>  #define SDHCI_VENDOR_SPEC		0xC0
>  #define  SDHCI_VENDOR_SPEC_SDIO_QUIRK	0x00000002
>  
> -#define ESDHC_FLAG_GPIO_FOR_CD		(1 << 0)
>  /*
>   * The CMDTYPE of the CMD register (offset 0xE) should be set to
>   * "11" when the STOP CMD12 is issued on imx53 to abort one
> @@ -70,19 +69,15 @@ static inline void esdhc_clrset_le(struct sdhci_host *host, u32 mask, u32 val, i
>  
>  static u32 esdhc_readl_le(struct sdhci_host *host, int reg)
>  {
> -	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
> -	struct pltfm_imx_data *imx_data = pltfm_host->priv;
> +	struct esdhc_platform_data *boarddata =
> +			host->mmc->parent->platform_data;
>  
> -	/* fake CARD_PRESENT flag on mx25/35 */
> +	/* fake CARD_PRESENT flag */
>  	u32 val = readl(host->ioaddr + reg);
>  
>  	if (unlikely((reg == SDHCI_PRESENT_STATE)
> -			&& (imx_data->flags & ESDHC_FLAG_GPIO_FOR_CD))) {
> -		struct esdhc_platform_data *boarddata =
> -				host->mmc->parent->platform_data;
> -
> -		if (boarddata && gpio_is_valid(boarddata->cd_gpio)
> -				&& gpio_get_value(boarddata->cd_gpio))
> +			&& gpio_is_valid(boarddata->cd_gpio))) {
> +		if (gpio_get_value(boarddata->cd_gpio))
>  			/* no card, if a valid gpio says so... */
>  			val &= ~SDHCI_CARD_PRESENT;
>  		else
> @@ -97,12 +92,13 @@ static void esdhc_writel_le(struct sdhci_host *host, u32 val, int reg)
>  {
>  	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
>  	struct pltfm_imx_data *imx_data = pltfm_host->priv;
> +	struct esdhc_platform_data *boarddata =
> +			host->mmc->parent->platform_data;
>  
>  	if (unlikely((reg == SDHCI_INT_ENABLE || reg == SDHCI_SIGNAL_ENABLE)
> -			&& (imx_data->flags & ESDHC_FLAG_GPIO_FOR_CD)))
> +			&& (boarddata->cd_type == ESDHC_CD_GPIO)))
>  		/*
>  		 * these interrupts won't work with a custom card_detect gpio
> -		 * (only applied to mx25/35)
>  		 */
>  		val &= ~(SDHCI_INT_CARD_REMOVE | SDHCI_INT_CARD_INSERT);
>  
> @@ -201,6 +197,18 @@ static unsigned int esdhc_pltfm_get_min_clock(struct sdhci_host *host)
>  	return clk_get_rate(pltfm_host->clk) / 256 / 16;
>  }
>  
> +static unsigned int esdhc_pltfm_get_ro(struct sdhci_host *host)
> +{
> +	struct esdhc_platform_data *boarddata =
> +			host->mmc->parent->platform_data;
> +
> +	if (gpio_is_valid(boarddata->wp_gpio))
> +		return gpio_get_value(boarddata->wp_gpio);
> +	else
> +		return !(readl(host->ioaddr + SDHCI_PRESENT_STATE) &
> +				SDHCI_WRITE_PROTECT);
> +}

Aren't you missing the NONE case here? Plus, I don't like having a
get_ro-function for the SIGNAL case, because in that case it is
superfluous. Though, I am not feeling strong about this if it makes the
rest of the code messier.

> +
>  static struct sdhci_ops sdhci_esdhc_ops = {
>  	.read_l = esdhc_readl_le,
>  	.read_w = esdhc_readw_le,
> @@ -212,6 +220,7 @@ static struct sdhci_ops sdhci_esdhc_ops = {
>  	.get_min_clock = esdhc_pltfm_get_min_clock,
>  	.get_max_blk_size = esdhc_pltfm_get_max_blk_size,
>  	.get_max_blk_count = esdhc_pltfm_get_max_blk_count,
> +	.get_ro = esdhc_pltfm_get_ro,
>  };
>  
>  static struct sdhci_pltfm_data sdhci_esdhc_imx_pdata = {
> @@ -221,17 +230,6 @@ static struct sdhci_pltfm_data sdhci_esdhc_imx_pdata = {
>  	.ops = &sdhci_esdhc_ops,
>  };
>  
> -static unsigned int esdhc_pltfm_get_ro(struct sdhci_host *host)
> -{
> -	struct esdhc_platform_data *boarddata =
> -			host->mmc->parent->platform_data;
> -
> -	if (boarddata && gpio_is_valid(boarddata->wp_gpio))
> -		return gpio_get_value(boarddata->wp_gpio);
> -	else
> -		return -ENOSYS;
> -}
> -
>  static irqreturn_t cd_irq(int irq, void *data)
>  {
>  	struct sdhci_host *sdhost = (struct sdhci_host *)data;
> @@ -272,23 +270,33 @@ static int __devinit sdhci_esdhc_imx_probe(struct platform_device *pdev)
>  	if (!cpu_is_mx25())
>  		host->quirks |= SDHCI_QUIRK_BROKEN_TIMEOUT_VAL;
>  
> -	if (cpu_is_mx25() || cpu_is_mx35()) {
> -		/* write_protect can't be routed to controller, use gpio */
> -		sdhci_esdhc_ops.get_ro = esdhc_pltfm_get_ro;
> -	}
> -
>  	if (!(cpu_is_mx25() || cpu_is_mx35() || cpu_is_mx51()))
>  		imx_data->flags |= ESDHC_FLAG_MULTIBLK_NO_INT;
>  
>  	boarddata = host->mmc->parent->platform_data;
> -	if (boarddata) {
> +	if (!boarddata) {
> +		dev_err(mmc_dev(host->mmc), "no board data!\n");
> +		err = -EINVAL;
> +		goto no_board_data;
> +	}
> +
> +	/* write_protect */
> +	if (boarddata->wp_type == ESDHC_WP_GPIO) {
>  		err = gpio_request_one(boarddata->wp_gpio, GPIOF_IN, "ESDHC_WP");
>  		if (err) {
>  			dev_warn(mmc_dev(host->mmc),
> -				"no write-protect pin available!\n");
> -			boarddata->wp_gpio = err;
> +				 "no write-protect pin available!\n");
> +			boarddata->wp_gpio = -EINVAL;
>  		}
> +	} else
> +		boarddata->wp_gpio = -EINVAL;

else-block needs braces

>  
> +	/* card_detect */
> +	if (boarddata->cd_type != ESDHC_CD_GPIO)
> +		boarddata->cd_gpio = -EINVAL;
> +
> +	switch (boarddata->cd_type) {
> +	case ESDHC_CD_GPIO:
>  		err = gpio_request_one(boarddata->cd_gpio, GPIOF_IN, "ESDHC_CD");
>  		if (err) {
>  			dev_warn(mmc_dev(host->mmc),
> @@ -296,10 +304,6 @@ static int __devinit sdhci_esdhc_imx_probe(struct platform_device *pdev)
>  			goto no_card_detect_pin;
>  		}
>  
> -		/* i.MX5x has issues to be researched */
> -		if (!cpu_is_mx25() && !cpu_is_mx35())
> -			goto not_supported;
> -
>  		err = request_irq(gpio_to_irq(boarddata->cd_gpio), cd_irq,
>  				 IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING,
>  				 mmc_hostname(host->mmc), host);
> @@ -307,10 +311,19 @@ static int __devinit sdhci_esdhc_imx_probe(struct platform_device *pdev)
>  			dev_warn(mmc_dev(host->mmc), "request irq error\n");
>  			goto no_card_detect_irq;
>  		}
> +		/* fall through */
>  
> -		imx_data->flags |= ESDHC_FLAG_GPIO_FOR_CD;
> -		/* Now we have a working card_detect again */
> +	case ESDHC_CD_SIGNAL:
> +		/* we have a working card_detect back */
>  		host->quirks &= ~SDHCI_QUIRK_BROKEN_CARD_DETECTION;
> +		break;
> +
> +	case ESDHC_CD_PERMANENT:
> +		host->mmc->caps = MMC_CAP_NONREMOVABLE;
> +		break;
> +
> +	case ESDHC_CD_NONE:
> +		break;
>  	}
>  
>  	err = sdhci_add_host(host);
> @@ -319,16 +332,20 @@ static int __devinit sdhci_esdhc_imx_probe(struct platform_device *pdev)
>  
>  	return 0;
>  
> - no_card_detect_irq:
> -	gpio_free(boarddata->cd_gpio);
> - no_card_detect_pin:
> -	boarddata->cd_gpio = err;
> - not_supported:
> -	kfree(imx_data);
> - err_add_host:
> +err_add_host:
> +	if (gpio_is_valid(boarddata->cd_gpio))
> +		free_irq(gpio_to_irq(boarddata->cd_gpio), host);
> +no_card_detect_irq:
> +	if (gpio_is_valid(boarddata->cd_gpio))
> +		gpio_free(boarddata->cd_gpio);
> +	if (gpio_is_valid(boarddata->wp_gpio))
> +		gpio_free(boarddata->wp_gpio);
> +no_card_detect_pin:
> +no_board_data:
>  	clk_disable(pltfm_host->clk);
>  	clk_put(pltfm_host->clk);
> - err_clk_get:
> +err_clk_get:
> +	kfree(imx_data);
>  	sdhci_pltfm_free(pdev);
>  	return err;
>  }
> @@ -343,14 +360,12 @@ static int __devexit sdhci_esdhc_imx_remove(struct platform_device *pdev)
>  
>  	sdhci_remove_host(host, dead);
>  
> -	if (boarddata && gpio_is_valid(boarddata->wp_gpio))
> +	if (gpio_is_valid(boarddata->wp_gpio))
>  		gpio_free(boarddata->wp_gpio);
>  
> -	if (boarddata && gpio_is_valid(boarddata->cd_gpio)) {
> +	if (gpio_is_valid(boarddata->cd_gpio)) {
> +		free_irq(gpio_to_irq(boarddata->cd_gpio), host);
>  		gpio_free(boarddata->cd_gpio);
> -
> -		if (!(host->quirks & SDHCI_QUIRK_BROKEN_CARD_DETECTION))
> -			free_irq(gpio_to_irq(boarddata->cd_gpio), host);
>  	}
>  
>  	clk_disable(pltfm_host->clk);
> -- 
> 1.7.4.1
> 
> --
> To unsubscribe from this list: send the line "unsubscribe linux-mmc" in
> the body of a message to majordomo at vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html

Regards,

   Wolfram

-- 
Pengutronix e.K.                           | Wolfram Sang                |
Industrial Linux Solutions                 | http://www.pengutronix.de/  |
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: application/pgp-signature
Size: 198 bytes
Desc: Digital signature
URL: <http://lists.infradead.org/pipermail/linux-arm-kernel/attachments/20110614/92d43bf1/attachment-0001.sig>

[PATCH v2 4/4] mmc: sdhci-esdhc-imx: extend card_detect and write_protect support for mx5

[Shawn Guo]

On Tue, Jun 14, 2011 at 11:51:29AM +0200, Wolfram Sang wrote:
> On Tue, Jun 14, 2011 at 02:47:39PM +0800, Shawn Guo wrote:
> > The patch extends card_detect and write_protect support to get mx5
> > family and more scenarios supported.  The changes include:
> > 
> >  * Turn platform_data from optional to mandatory
> >  * Add cd_types and wp_types into platform_data to cover more use
> >    cases
> >  * Remove the use of flag ESDHC_FLAG_GPIO_FOR_CD
> >  * Adjust some machine codes to adopt the platform_data changes
> > 
> > With this patch, card_detect and write_protect gets supported on
> > mx51_babbage, and other mx5 machines can easily get there with the
> > least board level configuration added.
> > 
> > Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
> 
> No time for a full review, but it looks a lot like going into the right

The lack of CD support is causing critical system performance issue.
There is monthly Linaro release coming shortly, and this is one
important issue needs to be fixed in the release.  Please find some
time to do a full review, if possible.  We need your ack to know if
the patch stands :)  

> direction. Thanks.
> 
> A few comments:
> 
> > ---
> > Changes since v1:
> >  * Took the suggestion from Arnaud Patard to add default pdata
> >    in imx_add_sdhci_esdhc_imx(), to avoid touching every single
> >    board file for the platform_data changes
> > 
> >  arch/arm/mach-imx/eukrea_mbimxsd25-baseboard.c     |    3 +-
> >  arch/arm/mach-imx/eukrea_mbimxsd35-baseboard.c     |    3 +-
> >  arch/arm/mach-imx/mach-mx25_3ds.c                  |    2 +
> >  arch/arm/mach-imx/mach-pcm043.c                    |    2 +
> >  arch/arm/mach-mx5/board-mx51_babbage.c             |   27 +++++-
> >  .../plat-mxc/devices/platform-sdhci-esdhc-imx.c    |   12 ++
> >  arch/arm/plat-mxc/include/mach/esdhc.h             |   25 ++++-
> >  drivers/mmc/host/sdhci-esdhc-imx.c                 |  115 +++++++++++---------
> >  8 files changed, 130 insertions(+), 59 deletions(-)
> > 
> > diff --git a/arch/arm/mach-imx/eukrea_mbimxsd25-baseboard.c b/arch/arm/mach-imx/eukrea_mbimxsd25-baseboard.c
> > index 01ebcb3..66e8726 100644
> > --- a/arch/arm/mach-imx/eukrea_mbimxsd25-baseboard.c
> > +++ b/arch/arm/mach-imx/eukrea_mbimxsd25-baseboard.c
> > @@ -225,7 +225,8 @@ struct imx_ssi_platform_data eukrea_mbimxsd_ssi_pdata __initconst = {
> >  
> >  static struct esdhc_platform_data sd1_pdata = {
> >  	.cd_gpio = GPIO_SD1CD,
> > -	.wp_gpio = -EINVAL,
> > +	.cd_type = ESDHC_CD_GPIO,
> > +	.wp_type = ESDHC_WP_NONE,
> >  };
> >  
> >  /*
> > diff --git a/arch/arm/mach-imx/eukrea_mbimxsd35-baseboard.c b/arch/arm/mach-imx/eukrea_mbimxsd35-baseboard.c
> > index 558eb52..0f0af02 100644
> > --- a/arch/arm/mach-imx/eukrea_mbimxsd35-baseboard.c
> > +++ b/arch/arm/mach-imx/eukrea_mbimxsd35-baseboard.c
> > @@ -236,7 +236,8 @@ struct imx_ssi_platform_data eukrea_mbimxsd_ssi_pdata __initconst = {
> >  
> >  static struct esdhc_platform_data sd1_pdata = {
> >  	.cd_gpio = GPIO_SD1CD,
> > -	.wp_gpio = -EINVAL,
> > +	.cd_type = ESDHC_CD_GPIO,
> > +	.wp_type = ESDHC_WP_NONE,
> >  };
> >  
> >  /*
> > diff --git a/arch/arm/mach-imx/mach-mx25_3ds.c b/arch/arm/mach-imx/mach-mx25_3ds.c
> > index 01534bb..7f66a91 100644
> > --- a/arch/arm/mach-imx/mach-mx25_3ds.c
> > +++ b/arch/arm/mach-imx/mach-mx25_3ds.c
> > @@ -215,6 +215,8 @@ static const struct imxi2c_platform_data mx25_3ds_i2c0_data __initconst = {
> >  static const struct esdhc_platform_data mx25pdk_esdhc_pdata __initconst = {
> >  	.wp_gpio = SD1_GPIO_WP,
> >  	.cd_gpio = SD1_GPIO_CD,
> > +	.wp_type = ESDHC_WP_GPIO,
> > +	.cd_type = ESDHC_CD_GPIO,
> >  };
> >  
> >  static void __init mx25pdk_init(void)
> > diff --git a/arch/arm/mach-imx/mach-pcm043.c b/arch/arm/mach-imx/mach-pcm043.c
> > index 163cc31..660ec3e 100644
> > --- a/arch/arm/mach-imx/mach-pcm043.c
> > +++ b/arch/arm/mach-imx/mach-pcm043.c
> > @@ -349,6 +349,8 @@ __setup("otg_mode=", pcm043_otg_mode);
> >  static struct esdhc_platform_data sd1_pdata = {
> >  	.wp_gpio = SD1_GPIO_WP,
> >  	.cd_gpio = SD1_GPIO_CD,
> > +	.wp_type = ESDHC_WP_GPIO,
> > +	.cd_type = ESDHC_CD_GPIO,
> >  };
> >  
> >  /*
> > diff --git a/arch/arm/mach-mx5/board-mx51_babbage.c b/arch/arm/mach-mx5/board-mx51_babbage.c
> > index e54e4bf..4db6cf9 100644
> > --- a/arch/arm/mach-mx5/board-mx51_babbage.c
> > +++ b/arch/arm/mach-mx5/board-mx51_babbage.c
> > @@ -34,6 +34,8 @@
> >  #include "devices.h"
> >  #include "cpu_op-mx51.h"
> >  
> > +#define BABBAGE_ESDHC2_WP	IMX_GPIO_NR(1, 5)
> > +#define BABBAGE_ESDHC2_CD	IMX_GPIO_NR(1, 6)
> >  #define BABBAGE_USB_HUB_RESET	IMX_GPIO_NR(1, 7)
> >  #define BABBAGE_USBH1_STP	IMX_GPIO_NR(1, 27)
> >  #define BABBAGE_USB_PHY_RESET	IMX_GPIO_NR(2, 5)
> > @@ -142,6 +144,10 @@ static iomux_v3_cfg_t mx51babbage_pads[] = {
> >  	MX51_PAD_SD1_DATA1__SD1_DATA1,
> >  	MX51_PAD_SD1_DATA2__SD1_DATA2,
> >  	MX51_PAD_SD1_DATA3__SD1_DATA3,
> > +	/* CD signal */
> > +	MX51_PAD_GPIO1_0__SD1_CD,
> > +	/* WP signal */
> > +	MX51_PAD_GPIO1_1__SD1_WP,
> >  
> >  	/* SD 2 */
> >  	MX51_PAD_SD2_CMD__SD2_CMD,
> > @@ -150,6 +156,11 @@ static iomux_v3_cfg_t mx51babbage_pads[] = {
> >  	MX51_PAD_SD2_DATA1__SD2_DATA1,
> >  	MX51_PAD_SD2_DATA2__SD2_DATA2,
> >  	MX51_PAD_SD2_DATA3__SD2_DATA3,
> > +	/* WP gpio */
> > +	MX51_PAD_GPIO1_5__GPIO1_5,
> > +	/* CD gpio */
> > +	MX51_PAD_GPIO1_6__GPIO1_6,
> > +
> >  
> >  	/* eCSPI1 */
> >  	MX51_PAD_CSPI1_MISO__ECSPI1_MISO,
> > @@ -331,6 +342,18 @@ static const struct spi_imx_master mx51_babbage_spi_pdata __initconst = {
> >  	.num_chipselect = ARRAY_SIZE(mx51_babbage_spi_cs),
> >  };
> >  
> > +static const struct esdhc_platform_data esdhc1_pdata __initconst = {
> > +	.wp_type = ESDHC_WP_SIGNAL,
> > +	.cd_type = ESDHC_CD_SIGNAL,
> > +};
> > +
> > +static const struct esdhc_platform_data esdhc2_pdata __initconst = {
> > +	.wp_gpio = BABBAGE_ESDHC2_WP,
> > +	.cd_gpio = BABBAGE_ESDHC2_CD,
> > +	.wp_type = ESDHC_WP_GPIO,
> > +	.cd_type = ESDHC_CD_GPIO,
> > +};
> > +
> >  /*
> >   * Board specific initialization.
> >   */
> > @@ -376,8 +399,8 @@ static void __init mx51_babbage_init(void)
> >  	mxc_iomux_v3_setup_pad(usbh1stp);
> >  	babbage_usbhub_reset();
> >  
> > -	imx51_add_sdhci_esdhc_imx(0, NULL);
> > -	imx51_add_sdhci_esdhc_imx(1, NULL);
> > +	imx51_add_sdhci_esdhc_imx(0, &esdhc1_pdata);
> > +	imx51_add_sdhci_esdhc_imx(1, &esdhc2_pdata);
> >  
> >  	spi_register_board_info(mx51_babbage_spi_board_info,
> >  		ARRAY_SIZE(mx51_babbage_spi_board_info));
> > diff --git a/arch/arm/plat-mxc/devices/platform-sdhci-esdhc-imx.c b/arch/arm/plat-mxc/devices/platform-sdhci-esdhc-imx.c
> > index 6b2940b..a880f73 100644
> > --- a/arch/arm/plat-mxc/devices/platform-sdhci-esdhc-imx.c
> > +++ b/arch/arm/plat-mxc/devices/platform-sdhci-esdhc-imx.c
> > @@ -65,6 +65,11 @@ imx53_sdhci_esdhc_imx_data[] __initconst = {
> >  };
> >  #endif /* ifdef CONFIG_SOC_IMX53 */
> >  
> > +static const struct esdhc_platform_data default_esdhc_pdata __initconst = {
> > +	.wp_type = ESDHC_WP_NONE,
> > +	.cd_type = ESDHC_CD_NONE,
> > +};
> > +
> >  struct platform_device *__init imx_add_sdhci_esdhc_imx(
> >  		const struct imx_sdhci_esdhc_imx_data *data,
> >  		const struct esdhc_platform_data *pdata)
> > @@ -81,6 +86,13 @@ struct platform_device *__init imx_add_sdhci_esdhc_imx(
> >  		},
> >  	};
> >  
> > +	/*
> > +	 * If machine does not provide a pdata, use the default one
> 
> s/a pdata/pdata/ (not 100% sure, though)
> 
OK

> > +	 * which means none WP/CD support
> 
> s/none/no/
> 
OK

> > +	 */
> > +	if (!pdata)
> > +		pdata = &default_esdhc_pdata;
> > +
> >  	return imx_add_platform_device("sdhci-esdhc-imx", data->id, res,
> >  			ARRAY_SIZE(res), pdata, sizeof(*pdata));
> >  }
> > diff --git a/arch/arm/plat-mxc/include/mach/esdhc.h b/arch/arm/plat-mxc/include/mach/esdhc.h
> > index 86003f4..fced348 100644
> > --- a/arch/arm/plat-mxc/include/mach/esdhc.h
> > +++ b/arch/arm/plat-mxc/include/mach/esdhc.h
> > @@ -10,17 +10,32 @@
> >  #ifndef __ASM_ARCH_IMX_ESDHC_H
> >  #define __ASM_ARCH_IMX_ESDHC_H
> >  
> > +enum wp_types {
> > +	ESDHC_WP_NONE,		/* no WP, neither signal nor gpio */
> > +	ESDHC_WP_SIGNAL,	/* mmc internal WP signal */
> 
> I think SIGNAL is not descriptive enough. Maybe
> 
We have the document telling it's internal.

> ESDHC_WP_INTERNAL		/* WP routed directly to mmc controller */
> 
I thought about that.  If we use ESDHC_WP_INTERNAL, ESDHC_WP_GPIO
should probably be the ESDHC_WP_EXTERNAL for the couple naming.  But
I like ESDHC_WP_GPIO over ESDHC_WP_EXTERNAL, so chose the couple
naming of ESDHC_WP_GPIO vs. ESDHC_WP_SIGNAL.

> ? It should be mentioned on which SoCs this is not available?
> 

>From bogus@does.not.exist.com  Wed Jun  1 12:03:18 2011
From: bogus@does.not.exist.com ()
Date: Wed, 01 Jun 2011 16:03:18 -0000
Subject: No subject
Message-ID: <mailman.25.1308056456.24103.linux-arm-kernel@lists.infradead.org>

design choice to connect card CD/WP to the pads or not, which the
controller CD/WP signal/function is available on.

> > +	ESDHC_WP_GPIO,		/* external gpio pin for WP */
> > +};
> > +
> > +enum cd_types {
> > +	ESDHC_CD_NONE,		/* no CD, neither signal nor gpio */
> > +	ESDHC_CD_SIGNAL,	/* mmc internal CD signal */
> 
> ditto
> 
ditto

> > +	ESDHC_CD_GPIO,		/* external gpio pin for CD */
> > +	ESDHC_CD_PERMANENT,	/* no CD, card permanently wired to host */
> > +};
> > +
> >  /**
> > - * struct esdhc_platform_data - optional platform data for esdhc on i.MX
> > - *
> > - * strongly recommended for i.MX25/35, not needed for other variants
> > + * struct esdhc_platform_data - platform data for esdhc on i.MX
> >   *
> > - * @wp_gpio:	gpio for write_protect (-EINVAL if unused)
> > - * @cd_gpio:	gpio for card_detect interrupt (-EINVAL if unused)
> > + * @wp_gpio:	gpio for write_protect
> > + * @cd_gpio:	gpio for card_detect interrupt
> > + * @wp_type:	type of write_protect method (see wp_types enum above)
> > + * @cd_type:	type of card_detect method (see cd_types enum above)
> >   */
> >  
> >  struct esdhc_platform_data {
> >  	unsigned int wp_gpio;
> >  	unsigned int cd_gpio;
> > +	enum wp_types wp_type;
> > +	enum cd_types cd_type;
> >  };
> >  #endif /* __ASM_ARCH_IMX_ESDHC_H */
> > diff --git a/drivers/mmc/host/sdhci-esdhc-imx.c b/drivers/mmc/host/sdhci-esdhc-imx.c
> > index 79b7a9a..9cba6eb 100644
> > --- a/drivers/mmc/host/sdhci-esdhc-imx.c
> > +++ b/drivers/mmc/host/sdhci-esdhc-imx.c
> > @@ -29,7 +29,6 @@
> >  #define SDHCI_VENDOR_SPEC		0xC0
> >  #define  SDHCI_VENDOR_SPEC_SDIO_QUIRK	0x00000002
> >  
> > -#define ESDHC_FLAG_GPIO_FOR_CD		(1 << 0)
> >  /*
> >   * The CMDTYPE of the CMD register (offset 0xE) should be set to
> >   * "11" when the STOP CMD12 is issued on imx53 to abort one
> > @@ -70,19 +69,15 @@ static inline void esdhc_clrset_le(struct sdhci_host *host, u32 mask, u32 val, i
> >  
> >  static u32 esdhc_readl_le(struct sdhci_host *host, int reg)
> >  {
> > -	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
> > -	struct pltfm_imx_data *imx_data = pltfm_host->priv;
> > +	struct esdhc_platform_data *boarddata =
> > +			host->mmc->parent->platform_data;
> >  
> > -	/* fake CARD_PRESENT flag on mx25/35 */
> > +	/* fake CARD_PRESENT flag */
> >  	u32 val = readl(host->ioaddr + reg);
> >  
> >  	if (unlikely((reg == SDHCI_PRESENT_STATE)
> > -			&& (imx_data->flags & ESDHC_FLAG_GPIO_FOR_CD))) {
> > -		struct esdhc_platform_data *boarddata =
> > -				host->mmc->parent->platform_data;
> > -
> > -		if (boarddata && gpio_is_valid(boarddata->cd_gpio)
> > -				&& gpio_get_value(boarddata->cd_gpio))
> > +			&& gpio_is_valid(boarddata->cd_gpio))) {
> > +		if (gpio_get_value(boarddata->cd_gpio))
> >  			/* no card, if a valid gpio says so... */
> >  			val &= ~SDHCI_CARD_PRESENT;
> >  		else
> > @@ -97,12 +92,13 @@ static void esdhc_writel_le(struct sdhci_host *host, u32 val, int reg)
> >  {
> >  	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
> >  	struct pltfm_imx_data *imx_data = pltfm_host->priv;
> > +	struct esdhc_platform_data *boarddata =
> > +			host->mmc->parent->platform_data;
> >  
> >  	if (unlikely((reg == SDHCI_INT_ENABLE || reg == SDHCI_SIGNAL_ENABLE)
> > -			&& (imx_data->flags & ESDHC_FLAG_GPIO_FOR_CD)))
> > +			&& (boarddata->cd_type == ESDHC_CD_GPIO)))
> >  		/*
> >  		 * these interrupts won't work with a custom card_detect gpio
> > -		 * (only applied to mx25/35)
> >  		 */
> >  		val &= ~(SDHCI_INT_CARD_REMOVE | SDHCI_INT_CARD_INSERT);
> >  
> > @@ -201,6 +197,18 @@ static unsigned int esdhc_pltfm_get_min_clock(struct sdhci_host *host)
> >  	return clk_get_rate(pltfm_host->clk) / 256 / 16;
> >  }
> >  
> > +static unsigned int esdhc_pltfm_get_ro(struct sdhci_host *host)
> > +{
> > +	struct esdhc_platform_data *boarddata =
> > +			host->mmc->parent->platform_data;
> > +
> > +	if (gpio_is_valid(boarddata->wp_gpio))
> > +		return gpio_get_value(boarddata->wp_gpio);
> > +	else
> > +		return !(readl(host->ioaddr + SDHCI_PRESENT_STATE) &
> > +				SDHCI_WRITE_PROTECT);
> > +}
> 
> Aren't you missing the NONE case here? Plus, I don't like having a
> get_ro-function for the SIGNAL case, because in that case it is
> superfluous. Though, I am not feeling strong about this if it makes the
> rest of the code messier.
> 
OK, I will go back to the existing one, which only handles gpio case
in esdhc_pltfm_get_ro and get it assigned to .get_ro only in case of
ESDHC_WP_GPIO.

> > +
> >  static struct sdhci_ops sdhci_esdhc_ops = {
> >  	.read_l = esdhc_readl_le,
> >  	.read_w = esdhc_readw_le,
> > @@ -212,6 +220,7 @@ static struct sdhci_ops sdhci_esdhc_ops = {
> >  	.get_min_clock = esdhc_pltfm_get_min_clock,
> >  	.get_max_blk_size = esdhc_pltfm_get_max_blk_size,
> >  	.get_max_blk_count = esdhc_pltfm_get_max_blk_count,
> > +	.get_ro = esdhc_pltfm_get_ro,
> >  };
> >  
> >  static struct sdhci_pltfm_data sdhci_esdhc_imx_pdata = {
> > @@ -221,17 +230,6 @@ static struct sdhci_pltfm_data sdhci_esdhc_imx_pdata = {
> >  	.ops = &sdhci_esdhc_ops,
> >  };
> >  
> > -static unsigned int esdhc_pltfm_get_ro(struct sdhci_host *host)
> > -{
> > -	struct esdhc_platform_data *boarddata =
> > -			host->mmc->parent->platform_data;
> > -
> > -	if (boarddata && gpio_is_valid(boarddata->wp_gpio))
> > -		return gpio_get_value(boarddata->wp_gpio);
> > -	else
> > -		return -ENOSYS;
> > -}
> > -
> >  static irqreturn_t cd_irq(int irq, void *data)
> >  {
> >  	struct sdhci_host *sdhost = (struct sdhci_host *)data;
> > @@ -272,23 +270,33 @@ static int __devinit sdhci_esdhc_imx_probe(struct platform_device *pdev)
> >  	if (!cpu_is_mx25())
> >  		host->quirks |= SDHCI_QUIRK_BROKEN_TIMEOUT_VAL;
> >  
> > -	if (cpu_is_mx25() || cpu_is_mx35()) {
> > -		/* write_protect can't be routed to controller, use gpio */
> > -		sdhci_esdhc_ops.get_ro = esdhc_pltfm_get_ro;
> > -	}
> > -
> >  	if (!(cpu_is_mx25() || cpu_is_mx35() || cpu_is_mx51()))
> >  		imx_data->flags |= ESDHC_FLAG_MULTIBLK_NO_INT;
> >  
> >  	boarddata = host->mmc->parent->platform_data;
> > -	if (boarddata) {
> > +	if (!boarddata) {
> > +		dev_err(mmc_dev(host->mmc), "no board data!\n");
> > +		err = -EINVAL;
> > +		goto no_board_data;
> > +	}
> > +
> > +	/* write_protect */
> > +	if (boarddata->wp_type == ESDHC_WP_GPIO) {
> >  		err = gpio_request_one(boarddata->wp_gpio, GPIOF_IN, "ESDHC_WP");
> >  		if (err) {
> >  			dev_warn(mmc_dev(host->mmc),
> > -				"no write-protect pin available!\n");
> > -			boarddata->wp_gpio = err;
> > +				 "no write-protect pin available!\n");
> > +			boarddata->wp_gpio = -EINVAL;
> >  		}
> > +	} else
> > +		boarddata->wp_gpio = -EINVAL;
> 
> else-block needs braces
> 
OK

-- 
Regards,
Shawn

[PATCH v2 4/4] mmc: sdhci-esdhc-imx: extend card_detect and write_protect support for mx5

[Wolfram Sang]

> important issue needs to be fixed in the release.  Please find some
> time to do a full review, if possible.  We need your ack to know if
> the patch stands :)  

Huh, my ack is needed for the linaro-kernel? :) Isn't it possible to
replace a V1 patch with a V2 patch in later kernels?

> > > diff --git a/arch/arm/plat-mxc/include/mach/esdhc.h b/arch/arm/plat-mxc/include/mach/esdhc.h
> > > index 86003f4..fced348 100644
> > > --- a/arch/arm/plat-mxc/include/mach/esdhc.h
> > > +++ b/arch/arm/plat-mxc/include/mach/esdhc.h
> > > @@ -10,17 +10,32 @@
> > >  #ifndef __ASM_ARCH_IMX_ESDHC_H
> > >  #define __ASM_ARCH_IMX_ESDHC_H
> > >  
> > > +enum wp_types {
> > > +	ESDHC_WP_NONE,		/* no WP, neither signal nor gpio */
> > > +	ESDHC_WP_SIGNAL,	/* mmc internal WP signal */
> > 
> > I think SIGNAL is not descriptive enough. Maybe
> > 
> We have the document telling it's internal.
> 
> > ESDHC_WP_INTERNAL		/* WP routed directly to mmc controller */
> > 
> I thought about that.  If we use ESDHC_WP_INTERNAL, ESDHC_WP_GPIO
> should probably be the ESDHC_WP_EXTERNAL for the couple naming.  But
> I like ESDHC_WP_GPIO over ESDHC_WP_EXTERNAL, so chose the couple
> naming of ESDHC_WP_GPIO vs. ESDHC_WP_SIGNAL.

ESDHC_WP_CONTROLLER? Or ESDHC_WP_CORE?

> > ? It should be mentioned on which SoCs this is not available?
> > 
> From SoC/controller POV, it's all available.  It's really a board
> design choice to connect card CD/WP to the pads or not, which the
> controller CD/WP signal/function is available on.

For mx25/35, I tried to find muxer settings but couldn't find them. It
seemed to me, GPIO is the only option there (I think I even asked
Richard). Can you route them on mx25/35, too?

Regards,

   Wolfram

-- 
Pengutronix e.K.                           | Wolfram Sang                |
Industrial Linux Solutions                 | http://www.pengutronix.de/  |
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: application/pgp-signature
Size: 198 bytes
Desc: Digital signature
URL: <http://lists.infradead.org/pipermail/linux-arm-kernel/attachments/20110614/08c5168d/attachment.sig>

[PATCH v2 4/4] mmc: sdhci-esdhc-imx: extend card_detect and write_protect support for mx5

[Shawn Guo]

On Tue, Jun 14, 2011 at 03:55:20PM +0200, Wolfram Sang wrote:
> 
> > important issue needs to be fixed in the release.  Please find some
> > time to do a full review, if possible.  We need your ack to know if
> > the patch stands :)  
> 
> Huh, my ack is needed for the linaro-kernel? :) Isn't it possible to
> replace a V1 patch with a V2 patch in later kernels?
> 
The linaro-kernel tree only accepts patches that have been on upstream
or are on the way to upstream (sitting on 'next' is a good proving).
Also since we are touching sdhci.c a little bit, it should be good for
us to get the patch on 'next' as early as we can, so that people can
start testing it.

Anyway, I will post v2 shortly.  Please help do a full review if
possible.  I'd appreciate it.

> > > > diff --git a/arch/arm/plat-mxc/include/mach/esdhc.h b/arch/arm/plat-mxc/include/mach/esdhc.h
> > > > index 86003f4..fced348 100644
> > > > --- a/arch/arm/plat-mxc/include/mach/esdhc.h
> > > > +++ b/arch/arm/plat-mxc/include/mach/esdhc.h
> > > > @@ -10,17 +10,32 @@
> > > >  #ifndef __ASM_ARCH_IMX_ESDHC_H
> > > >  #define __ASM_ARCH_IMX_ESDHC_H
> > > >  
> > > > +enum wp_types {
> > > > +	ESDHC_WP_NONE,		/* no WP, neither signal nor gpio */
> > > > +	ESDHC_WP_SIGNAL,	/* mmc internal WP signal */
> > > 
> > > I think SIGNAL is not descriptive enough. Maybe
> > > 
> > We have the document telling it's internal.
> > 
> > > ESDHC_WP_INTERNAL		/* WP routed directly to mmc controller */
> > > 
> > I thought about that.  If we use ESDHC_WP_INTERNAL, ESDHC_WP_GPIO
> > should probably be the ESDHC_WP_EXTERNAL for the couple naming.  But
> > I like ESDHC_WP_GPIO over ESDHC_WP_EXTERNAL, so chose the couple
> > naming of ESDHC_WP_GPIO vs. ESDHC_WP_SIGNAL.
> 
> ESDHC_WP_CONTROLLER? Or ESDHC_WP_CORE?
> 
Ok, going ESDHC_WP_CONTROLLER

> > > ? It should be mentioned on which SoCs this is not available?
> > > 
> > From SoC/controller POV, it's all available.  It's really a board
> > design choice to connect card CD/WP to the pads or not, which the
> > controller CD/WP signal/function is available on.
> 
> For mx25/35, I tried to find muxer settings but couldn't find them. It
> seemed to me, GPIO is the only option there (I think I even asked
> Richard). Can you route them on mx25/35, too?
> 
Sorry for confusion here.  It's all available from eSDHC controller
POV.  But no, it's not available on mx25/35 from SoC pinmux POV.  So
you are right.

-- 
Regards,
Shawn

[PATCH v2 4/4] mmc: sdhci-esdhc-imx: extend card_detect and write_protect support for mx5

[Shawn Guo]

On Tue, Jun 14, 2011 at 09:06:11PM +0800, Shawn Guo wrote:
[...]
> > >  
> > > +static unsigned int esdhc_pltfm_get_ro(struct sdhci_host *host)
> > > +{
> > > +	struct esdhc_platform_data *boarddata =
> > > +			host->mmc->parent->platform_data;
> > > +
> > > +	if (gpio_is_valid(boarddata->wp_gpio))
> > > +		return gpio_get_value(boarddata->wp_gpio);
> > > +	else
> > > +		return !(readl(host->ioaddr + SDHCI_PRESENT_STATE) &
> > > +				SDHCI_WRITE_PROTECT);
> > > +}
> > 
> > Aren't you missing the NONE case here? Plus, I don't like having a
> > get_ro-function for the SIGNAL case, because in that case it is
> > superfluous. Though, I am not feeling strong about this if it makes the
> > rest of the code messier.
> > 
> OK, I will go back to the existing one, which only handles gpio case
> in esdhc_pltfm_get_ro and get it assigned to .get_ro only in case of
> ESDHC_WP_GPIO.
> 
Sorry.  I had some reason for moving esdhc_pltfm_get_ro around.  We
can not keep the existing approach (what I said above).  For mx51
babbage example, esdhc1 uses internal WP while esdhc2 uses gpio WP.
If we have esdhc_pltfm_get_ro handle gpio only and assign it to
sdhci_esdhc_ops.get_ro in .probe only when wp_type is ESDHC_WP_GPIO,
that works for esdhc2 but breaks esdhc1 WP function.  So no, I will
not change my code except adding NONE case handling there.

-- 
Regards,
Shawn

[PATCH v2 4/4] mmc: sdhci-esdhc-imx: extend card_detect and write_protect support for mx5

[Wolfram Sang]

> Sorry.  I had some reason for moving esdhc_pltfm_get_ro around.  We
> can not keep the existing approach (what I said above).  For mx51
> babbage example, esdhc1 uses internal WP while esdhc2 uses gpio WP.
> If we have esdhc_pltfm_get_ro handle gpio only and assign it to
> sdhci_esdhc_ops.get_ro in .probe only when wp_type is ESDHC_WP_GPIO,
> that works for esdhc2 but breaks esdhc1 WP function.  So no, I will
> not change my code except adding NONE case handling there.

Ok, fine with me. Thanks for checking!

-- 
Pengutronix e.K.                           | Wolfram Sang                |
Industrial Linux Solutions                 | http://www.pengutronix.de/  |
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: application/pgp-signature
Size: 198 bytes
Desc: Digital signature
URL: <http://lists.infradead.org/pipermail/linux-arm-kernel/attachments/20110615/d5cff7fc/attachment.sig>

[PATCH v2 0/4] Extend sdhci-esdhc-imx card_detect and write_protect support for mx5

[Shawn Guo]

The card-present polling for sdhci based driver is very expensive
in terms of the impact to system performance.  We observe a few
system performance issues from Freescale and Linaro on mx5 platforms,
which have been proved card polling related.

The patch set extends the current sdhci-esdhc-imx card_detect and
write_protect support to cover mx5 platforms, and solves above
performance issues.

Changes since v1:
 * Rebase on today's linux-next
 * Take the suggestion from Arnaud Patard to add default pdata in
   imx_add_sdhci_esdhc_imx(), to avoid touching every single board
   file for the platform_data changes
 * Add comment for sdhci.c change
 * Change ESDHC_CD(WP)_SIGNAL to ESDHC_CD(WP)_CONTROLLER for a more
   descriptive name
 * Add missing NONE case handling in esdhc_pltfm_get_ro
 * Improve a couple comment wording per suggestion from Wolfram Sang

Shawn Guo (4):
      mmc: sdhci: fix interrupt storm from card detection
      mmc: sdhci-esdhc-imx: SDHCI_CARD_PRESENT does not get cleared
      mmc: sdhci-esdhc-imx: remove "WP" from flag ESDHC_FLAG_GPIO_FOR_CD_WP
      mmc: sdhci-esdhc-imx: extend card_detect and write_protect support for mx5

 arch/arm/mach-imx/eukrea_mbimxsd25-baseboard.c     |    3 +-
 arch/arm/mach-imx/eukrea_mbimxsd35-baseboard.c     |    3 +-
 arch/arm/mach-imx/mach-mx25_3ds.c                  |    2 +
 arch/arm/mach-imx/mach-pcm043.c                    |    2 +
 arch/arm/mach-mx5/board-mx51_babbage.c             |   14 ++-
 arch/arm/mach-mx5/board-mx53_loco.c                |    4 +
 .../plat-mxc/devices/platform-sdhci-esdhc-imx.c    |   12 ++
 arch/arm/plat-mxc/include/mach/esdhc.h             |   25 ++++-
 drivers/mmc/host/sdhci-esdhc-imx.c                 |  123 ++++++++++++--------
 drivers/mmc/host/sdhci.c                           |   23 +++-
 10 files changed, 145 insertions(+), 66 deletions(-)

[PATCH v2 1/4] mmc: sdhci: fix interrupt storm from card detection

[Shawn Guo]

The issue was initially found by Eric Benard as below.

http://permalink.gmane.org/gmane.linux.ports.arm.kernel/108031

Not sure about other SDHCI based controller, but on Freescale eSDHC,
the SDHCI_INT_CARD_INSERT bits will be immediately set again when it
gets cleared, if a card is inserted. The driver need to mask the irq
to prevent interrupt storm which will freeze the system.  And the
SDHCI_INT_CARD_REMOVE gets the same situation.

The patch fixes the problem based on the initial idea from
Eric Benard.

Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Cc: Eric Benard <eric@eukrea.com>
---
 drivers/mmc/host/sdhci.c |   23 ++++++++++++++++++++---
 1 files changed, 20 insertions(+), 3 deletions(-)

diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index 91d9892..0dd10e4 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -2154,13 +2154,30 @@ static irqreturn_t sdhci_irq(int irq, void *dev_id)
 		mmc_hostname(host->mmc), intmask);
 
 	if (intmask & (SDHCI_INT_CARD_INSERT | SDHCI_INT_CARD_REMOVE)) {
+		u32 present = sdhci_readl(host, SDHCI_PRESENT_STATE) &
+			      SDHCI_CARD_PRESENT;
+
+		/*
+		 * There is a observation on i.mx esdhc.  INSERT bit will be
+		 * immediately set again when it gets cleared, if a card is
+		 * inserted.  We have to mask the irq to prevent interrupt
+		 * storm which will freeze the system.  And the REMOVE gets
+		 * the same situation.
+		 *
+		 * More testing are needed here to ensure it works for other
+		 * platforms though.
+		 */
+		sdhci_mask_irqs(host, present ? SDHCI_INT_CARD_INSERT :
+						SDHCI_INT_CARD_REMOVE);
+		sdhci_unmask_irqs(host, present ? SDHCI_INT_CARD_REMOVE :
+						  SDHCI_INT_CARD_INSERT);
+
 		sdhci_writel(host, intmask & (SDHCI_INT_CARD_INSERT |
-			SDHCI_INT_CARD_REMOVE), SDHCI_INT_STATUS);
+			     SDHCI_INT_CARD_REMOVE), SDHCI_INT_STATUS);
+		intmask &= ~(SDHCI_INT_CARD_INSERT | SDHCI_INT_CARD_REMOVE);
 		tasklet_schedule(&host->card_tasklet);
 	}
 
-	intmask &= ~(SDHCI_INT_CARD_INSERT | SDHCI_INT_CARD_REMOVE);
-
 	if (intmask & SDHCI_INT_CMD_MASK) {
 		sdhci_writel(host, intmask & SDHCI_INT_CMD_MASK,
 			SDHCI_INT_STATUS);
-- 
1.7.4.1

[PATCH v2 2/4] mmc: sdhci-esdhc-imx: SDHCI_CARD_PRESENT does not get cleared

[Shawn Guo]

The function esdhc_readl_le intends to clear bit SDHCI_CARD_PRESENT,
when the card detect gpio tells there is no card.  But it does not
clear the bit actually.  The patch gives a fix on that.

Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
---
 drivers/mmc/host/sdhci-esdhc-imx.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/mmc/host/sdhci-esdhc-imx.c b/drivers/mmc/host/sdhci-esdhc-imx.c
index 248b8e5..94097c0 100644
--- a/drivers/mmc/host/sdhci-esdhc-imx.c
+++ b/drivers/mmc/host/sdhci-esdhc-imx.c
@@ -84,7 +84,7 @@ static u32 esdhc_readl_le(struct sdhci_host *host, int reg)
 		if (boarddata && gpio_is_valid(boarddata->cd_gpio)
 				&& gpio_get_value(boarddata->cd_gpio))
 			/* no card, if a valid gpio says so... */
-			val &= SDHCI_CARD_PRESENT;
+			val &= ~SDHCI_CARD_PRESENT;
 		else
 			/* ... in all other cases assume card is present */
 			val |= SDHCI_CARD_PRESENT;
-- 
1.7.4.1

[PATCH v2 3/4] mmc: sdhci-esdhc-imx: remove "WP" from flag ESDHC_FLAG_GPIO_FOR_CD_WP

[Shawn Guo]

The use of flag ESDHC_FLAG_GPIO_FOR_CD_WP is all CD related.  It does
not necessarily need to bother WP in the flag name.

Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
---
 drivers/mmc/host/sdhci-esdhc-imx.c |    8 ++++----
 1 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/mmc/host/sdhci-esdhc-imx.c b/drivers/mmc/host/sdhci-esdhc-imx.c
index 94097c0..79b7a9a 100644
--- a/drivers/mmc/host/sdhci-esdhc-imx.c
+++ b/drivers/mmc/host/sdhci-esdhc-imx.c
@@ -29,7 +29,7 @@
 #define SDHCI_VENDOR_SPEC		0xC0
 #define  SDHCI_VENDOR_SPEC_SDIO_QUIRK	0x00000002
 
-#define ESDHC_FLAG_GPIO_FOR_CD_WP	(1 << 0)
+#define ESDHC_FLAG_GPIO_FOR_CD		(1 << 0)
 /*
  * The CMDTYPE of the CMD register (offset 0xE) should be set to
  * "11" when the STOP CMD12 is issued on imx53 to abort one
@@ -77,7 +77,7 @@ static u32 esdhc_readl_le(struct sdhci_host *host, int reg)
 	u32 val = readl(host->ioaddr + reg);
 
 	if (unlikely((reg == SDHCI_PRESENT_STATE)
-			&& (imx_data->flags & ESDHC_FLAG_GPIO_FOR_CD_WP))) {
+			&& (imx_data->flags & ESDHC_FLAG_GPIO_FOR_CD))) {
 		struct esdhc_platform_data *boarddata =
 				host->mmc->parent->platform_data;
 
@@ -99,7 +99,7 @@ static void esdhc_writel_le(struct sdhci_host *host, u32 val, int reg)
 	struct pltfm_imx_data *imx_data = pltfm_host->priv;
 
 	if (unlikely((reg == SDHCI_INT_ENABLE || reg == SDHCI_SIGNAL_ENABLE)
-			&& (imx_data->flags & ESDHC_FLAG_GPIO_FOR_CD_WP)))
+			&& (imx_data->flags & ESDHC_FLAG_GPIO_FOR_CD)))
 		/*
 		 * these interrupts won't work with a custom card_detect gpio
 		 * (only applied to mx25/35)
@@ -308,7 +308,7 @@ static int __devinit sdhci_esdhc_imx_probe(struct platform_device *pdev)
 			goto no_card_detect_irq;
 		}
 
-		imx_data->flags |= ESDHC_FLAG_GPIO_FOR_CD_WP;
+		imx_data->flags |= ESDHC_FLAG_GPIO_FOR_CD;
 		/* Now we have a working card_detect again */
 		host->quirks &= ~SDHCI_QUIRK_BROKEN_CARD_DETECTION;
 	}
-- 
1.7.4.1

[PATCH v2 4/4] mmc: sdhci-esdhc-imx: extend card_detect and write_protect support for mx5

[Shawn Guo]

The patch extends card_detect and write_protect support to get mx5
family and more scenarios supported.  The changes include:

 * Turn platform_data from optional to mandatory
 * Add cd_types and wp_types into platform_data to cover more use
   cases
 * Remove the use of flag ESDHC_FLAG_GPIO_FOR_CD
 * Adjust some machine codes to adopt the platform_data changes

With this patch, card_detect and write_protect gets supported on
mx5 based platforms.

Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
---
 arch/arm/mach-imx/eukrea_mbimxsd25-baseboard.c     |    3 +-
 arch/arm/mach-imx/eukrea_mbimxsd35-baseboard.c     |    3 +-
 arch/arm/mach-imx/mach-mx25_3ds.c                  |    2 +
 arch/arm/mach-imx/mach-pcm043.c                    |    2 +
 arch/arm/mach-mx5/board-mx51_babbage.c             |   14 ++-
 arch/arm/mach-mx5/board-mx53_loco.c                |    4 +
 .../plat-mxc/devices/platform-sdhci-esdhc-imx.c    |   12 ++
 arch/arm/plat-mxc/include/mach/esdhc.h             |   25 ++++-
 drivers/mmc/host/sdhci-esdhc-imx.c                 |  121 ++++++++++++--------
 9 files changed, 124 insertions(+), 62 deletions(-)

diff --git a/arch/arm/mach-imx/eukrea_mbimxsd25-baseboard.c b/arch/arm/mach-imx/eukrea_mbimxsd25-baseboard.c
index 01ebcb3..66e8726 100644
--- a/arch/arm/mach-imx/eukrea_mbimxsd25-baseboard.c
+++ b/arch/arm/mach-imx/eukrea_mbimxsd25-baseboard.c
@@ -225,7 +225,8 @@ struct imx_ssi_platform_data eukrea_mbimxsd_ssi_pdata __initconst = {
 
 static struct esdhc_platform_data sd1_pdata = {
 	.cd_gpio = GPIO_SD1CD,
-	.wp_gpio = -EINVAL,
+	.cd_type = ESDHC_CD_GPIO,
+	.wp_type = ESDHC_WP_NONE,
 };
 
 /*
diff --git a/arch/arm/mach-imx/eukrea_mbimxsd35-baseboard.c b/arch/arm/mach-imx/eukrea_mbimxsd35-baseboard.c
index 558eb52..0f0af02 100644
--- a/arch/arm/mach-imx/eukrea_mbimxsd35-baseboard.c
+++ b/arch/arm/mach-imx/eukrea_mbimxsd35-baseboard.c
@@ -236,7 +236,8 @@ struct imx_ssi_platform_data eukrea_mbimxsd_ssi_pdata __initconst = {
 
 static struct esdhc_platform_data sd1_pdata = {
 	.cd_gpio = GPIO_SD1CD,
-	.wp_gpio = -EINVAL,
+	.cd_type = ESDHC_CD_GPIO,
+	.wp_type = ESDHC_WP_NONE,
 };
 
 /*
diff --git a/arch/arm/mach-imx/mach-mx25_3ds.c b/arch/arm/mach-imx/mach-mx25_3ds.c
index 01534bb..7f66a91 100644
--- a/arch/arm/mach-imx/mach-mx25_3ds.c
+++ b/arch/arm/mach-imx/mach-mx25_3ds.c
@@ -215,6 +215,8 @@ static const struct imxi2c_platform_data mx25_3ds_i2c0_data __initconst = {
 static const struct esdhc_platform_data mx25pdk_esdhc_pdata __initconst = {
 	.wp_gpio = SD1_GPIO_WP,
 	.cd_gpio = SD1_GPIO_CD,
+	.wp_type = ESDHC_WP_GPIO,
+	.cd_type = ESDHC_CD_GPIO,
 };
 
 static void __init mx25pdk_init(void)
diff --git a/arch/arm/mach-imx/mach-pcm043.c b/arch/arm/mach-imx/mach-pcm043.c
index 163cc31..660ec3e 100644
--- a/arch/arm/mach-imx/mach-pcm043.c
+++ b/arch/arm/mach-imx/mach-pcm043.c
@@ -349,6 +349,8 @@ __setup("otg_mode=", pcm043_otg_mode);
 static struct esdhc_platform_data sd1_pdata = {
 	.wp_gpio = SD1_GPIO_WP,
 	.cd_gpio = SD1_GPIO_CD,
+	.wp_type = ESDHC_WP_GPIO,
+	.cd_type = ESDHC_CD_GPIO,
 };
 
 /*
diff --git a/arch/arm/mach-mx5/board-mx51_babbage.c b/arch/arm/mach-mx5/board-mx51_babbage.c
index 15c6000..e400b09 100644
--- a/arch/arm/mach-mx5/board-mx51_babbage.c
+++ b/arch/arm/mach-mx5/board-mx51_babbage.c
@@ -41,8 +41,6 @@
 #define BABBAGE_POWER_KEY	IMX_GPIO_NR(2, 21)
 #define BABBAGE_ECSPI1_CS0	IMX_GPIO_NR(4, 24)
 #define BABBAGE_ECSPI1_CS1	IMX_GPIO_NR(4, 25)
-#define BABBAGE_SD1_CD		IMX_GPIO_NR(1, 0)
-#define BABBAGE_SD1_WP		IMX_GPIO_NR(1, 1)
 #define BABBAGE_SD2_CD		IMX_GPIO_NR(1, 6)
 #define BABBAGE_SD2_WP		IMX_GPIO_NR(1, 5)
 
@@ -146,8 +144,9 @@ static iomux_v3_cfg_t mx51babbage_pads[] = {
 	MX51_PAD_SD1_DATA1__SD1_DATA1,
 	MX51_PAD_SD1_DATA2__SD1_DATA2,
 	MX51_PAD_SD1_DATA3__SD1_DATA3,
-	MX51_PAD_GPIO1_0__GPIO1_0,
-	MX51_PAD_GPIO1_1__GPIO1_1,
+	/* CD/WP from controller */
+	MX51_PAD_GPIO1_0__SD1_CD,
+	MX51_PAD_GPIO1_1__SD1_WP,
 
 	/* SD 2 */
 	MX51_PAD_SD2_CMD__SD2_CMD,
@@ -156,6 +155,7 @@ static iomux_v3_cfg_t mx51babbage_pads[] = {
 	MX51_PAD_SD2_DATA1__SD2_DATA1,
 	MX51_PAD_SD2_DATA2__SD2_DATA2,
 	MX51_PAD_SD2_DATA3__SD2_DATA3,
+	/* CD/WP gpio */
 	MX51_PAD_GPIO1_6__GPIO1_6,
 	MX51_PAD_GPIO1_5__GPIO1_5,
 
@@ -340,13 +340,15 @@ static const struct spi_imx_master mx51_babbage_spi_pdata __initconst = {
 };
 
 static const struct esdhc_platform_data mx51_babbage_sd1_data __initconst = {
-	.cd_gpio = BABBAGE_SD1_CD,
-	.wp_gpio = BABBAGE_SD1_WP,
+	.cd_type = ESDHC_CD_CONTROLLER,
+	.wp_type = ESDHC_WP_CONTROLLER,
 };
 
 static const struct esdhc_platform_data mx51_babbage_sd2_data __initconst = {
 	.cd_gpio = BABBAGE_SD2_CD,
 	.wp_gpio = BABBAGE_SD2_WP,
+	.cd_type = ESDHC_CD_GPIO,
+	.wp_type = ESDHC_WP_GPIO,
 };
 
 /*
diff --git a/arch/arm/mach-mx5/board-mx53_loco.c b/arch/arm/mach-mx5/board-mx53_loco.c
index 54be525..4e1d51d 100644
--- a/arch/arm/mach-mx5/board-mx53_loco.c
+++ b/arch/arm/mach-mx5/board-mx53_loco.c
@@ -210,11 +210,15 @@ static const struct gpio_keys_platform_data loco_button_data __initconst = {
 
 static const struct esdhc_platform_data mx53_loco_sd1_data __initconst = {
 	.cd_gpio = LOCO_SD1_CD,
+	.cd_type = ESDHC_CD_GPIO,
+	.wp_type = ESDHC_WP_NONE,
 };
 
 static const struct esdhc_platform_data mx53_loco_sd3_data __initconst = {
 	.cd_gpio = LOCO_SD3_CD,
 	.wp_gpio = LOCO_SD3_WP,
+	.cd_type = ESDHC_CD_GPIO,
+	.wp_type = ESDHC_WP_GPIO,
 };
 
 static inline void mx53_loco_fec_reset(void)
diff --git a/arch/arm/plat-mxc/devices/platform-sdhci-esdhc-imx.c b/arch/arm/plat-mxc/devices/platform-sdhci-esdhc-imx.c
index 6b2940b..79d6d71 100644
--- a/arch/arm/plat-mxc/devices/platform-sdhci-esdhc-imx.c
+++ b/arch/arm/plat-mxc/devices/platform-sdhci-esdhc-imx.c
@@ -65,6 +65,11 @@ imx53_sdhci_esdhc_imx_data[] __initconst = {
 };
 #endif /* ifdef CONFIG_SOC_IMX53 */
 
+static const struct esdhc_platform_data default_esdhc_pdata __initconst = {
+	.wp_type = ESDHC_WP_NONE,
+	.cd_type = ESDHC_CD_NONE,
+};
+
 struct platform_device *__init imx_add_sdhci_esdhc_imx(
 		const struct imx_sdhci_esdhc_imx_data *data,
 		const struct esdhc_platform_data *pdata)
@@ -81,6 +86,13 @@ struct platform_device *__init imx_add_sdhci_esdhc_imx(
 		},
 	};
 
+	/*
+	 * If machine does not provide pdata, use the default one
+	 * which means no WP/CD support
+	 */
+	if (!pdata)
+		pdata = &default_esdhc_pdata;
+
 	return imx_add_platform_device("sdhci-esdhc-imx", data->id, res,
 			ARRAY_SIZE(res), pdata, sizeof(*pdata));
 }
diff --git a/arch/arm/plat-mxc/include/mach/esdhc.h b/arch/arm/plat-mxc/include/mach/esdhc.h
index 86003f4..aaf9748 100644
--- a/arch/arm/plat-mxc/include/mach/esdhc.h
+++ b/arch/arm/plat-mxc/include/mach/esdhc.h
@@ -10,17 +10,34 @@
 #ifndef __ASM_ARCH_IMX_ESDHC_H
 #define __ASM_ARCH_IMX_ESDHC_H
 
+enum wp_types {
+	ESDHC_WP_NONE,		/* no WP, neither controller nor gpio */
+	ESDHC_WP_CONTROLLER,	/* mmc controller internal WP */
+	ESDHC_WP_GPIO,		/* external gpio pin for WP */
+};
+
+enum cd_types {
+	ESDHC_CD_NONE,		/* no CD, neither controller nor gpio */
+	ESDHC_CD_CONTROLLER,	/* mmc controller internal CD */
+	ESDHC_CD_GPIO,		/* external gpio pin for CD */
+	ESDHC_CD_PERMANENT,	/* no CD, card permanently wired to host */
+};
+
 /**
- * struct esdhc_platform_data - optional platform data for esdhc on i.MX
+ * struct esdhc_platform_data - platform data for esdhc on i.MX
  *
- * strongly recommended for i.MX25/35, not needed for other variants
+ * ESDHC_WP(CD)_CONTROLLER type is not available on i.MX25/35.
  *
- * @wp_gpio:	gpio for write_protect (-EINVAL if unused)
- * @cd_gpio:	gpio for card_detect interrupt (-EINVAL if unused)
+ * @wp_gpio:	gpio for write_protect
+ * @cd_gpio:	gpio for card_detect interrupt
+ * @wp_type:	type of write_protect method (see wp_types enum above)
+ * @cd_type:	type of card_detect method (see cd_types enum above)
  */
 
 struct esdhc_platform_data {
 	unsigned int wp_gpio;
 	unsigned int cd_gpio;
+	enum wp_types wp_type;
+	enum cd_types cd_type;
 };
 #endif /* __ASM_ARCH_IMX_ESDHC_H */
diff --git a/drivers/mmc/host/sdhci-esdhc-imx.c b/drivers/mmc/host/sdhci-esdhc-imx.c
index 79b7a9a..416a043 100644
--- a/drivers/mmc/host/sdhci-esdhc-imx.c
+++ b/drivers/mmc/host/sdhci-esdhc-imx.c
@@ -29,7 +29,6 @@
 #define SDHCI_VENDOR_SPEC		0xC0
 #define  SDHCI_VENDOR_SPEC_SDIO_QUIRK	0x00000002
 
-#define ESDHC_FLAG_GPIO_FOR_CD		(1 << 0)
 /*
  * The CMDTYPE of the CMD register (offset 0xE) should be set to
  * "11" when the STOP CMD12 is issued on imx53 to abort one
@@ -70,19 +69,15 @@ static inline void esdhc_clrset_le(struct sdhci_host *host, u32 mask, u32 val, i
 
 static u32 esdhc_readl_le(struct sdhci_host *host, int reg)
 {
-	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
-	struct pltfm_imx_data *imx_data = pltfm_host->priv;
+	struct esdhc_platform_data *boarddata =
+			host->mmc->parent->platform_data;
 
-	/* fake CARD_PRESENT flag on mx25/35 */
+	/* fake CARD_PRESENT flag */
 	u32 val = readl(host->ioaddr + reg);
 
 	if (unlikely((reg == SDHCI_PRESENT_STATE)
-			&& (imx_data->flags & ESDHC_FLAG_GPIO_FOR_CD))) {
-		struct esdhc_platform_data *boarddata =
-				host->mmc->parent->platform_data;
-
-		if (boarddata && gpio_is_valid(boarddata->cd_gpio)
-				&& gpio_get_value(boarddata->cd_gpio))
+			&& gpio_is_valid(boarddata->cd_gpio))) {
+		if (gpio_get_value(boarddata->cd_gpio))
 			/* no card, if a valid gpio says so... */
 			val &= ~SDHCI_CARD_PRESENT;
 		else
@@ -97,12 +92,13 @@ static void esdhc_writel_le(struct sdhci_host *host, u32 val, int reg)
 {
 	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
 	struct pltfm_imx_data *imx_data = pltfm_host->priv;
+	struct esdhc_platform_data *boarddata =
+			host->mmc->parent->platform_data;
 
 	if (unlikely((reg == SDHCI_INT_ENABLE || reg == SDHCI_SIGNAL_ENABLE)
-			&& (imx_data->flags & ESDHC_FLAG_GPIO_FOR_CD)))
+			&& (boarddata->cd_type == ESDHC_CD_GPIO)))
 		/*
 		 * these interrupts won't work with a custom card_detect gpio
-		 * (only applied to mx25/35)
 		 */
 		val &= ~(SDHCI_INT_CARD_REMOVE | SDHCI_INT_CARD_INSERT);
 
@@ -201,6 +197,23 @@ static unsigned int esdhc_pltfm_get_min_clock(struct sdhci_host *host)
 	return clk_get_rate(pltfm_host->clk) / 256 / 16;
 }
 
+static unsigned int esdhc_pltfm_get_ro(struct sdhci_host *host)
+{
+	struct esdhc_platform_data *boarddata =
+			host->mmc->parent->platform_data;
+
+	switch (boarddata->wp_type) {
+	case ESDHC_WP_GPIO:
+		if (gpio_is_valid(boarddata->wp_gpio))
+			return gpio_get_value(boarddata->wp_gpio);
+	case ESDHC_WP_CONTROLLER:
+		return !(readl(host->ioaddr + SDHCI_PRESENT_STATE) &
+			       SDHCI_WRITE_PROTECT);
+	case ESDHC_WP_NONE:
+		return -ENOSYS;
+	}
+}
+
 static struct sdhci_ops sdhci_esdhc_ops = {
 	.read_l = esdhc_readl_le,
 	.read_w = esdhc_readw_le,
@@ -212,6 +225,7 @@ static struct sdhci_ops sdhci_esdhc_ops = {
 	.get_min_clock = esdhc_pltfm_get_min_clock,
 	.get_max_blk_size = esdhc_pltfm_get_max_blk_size,
 	.get_max_blk_count = esdhc_pltfm_get_max_blk_count,
+	.get_ro = esdhc_pltfm_get_ro,
 };
 
 static struct sdhci_pltfm_data sdhci_esdhc_imx_pdata = {
@@ -221,17 +235,6 @@ static struct sdhci_pltfm_data sdhci_esdhc_imx_pdata = {
 	.ops = &sdhci_esdhc_ops,
 };
 
-static unsigned int esdhc_pltfm_get_ro(struct sdhci_host *host)
-{
-	struct esdhc_platform_data *boarddata =
-			host->mmc->parent->platform_data;
-
-	if (boarddata && gpio_is_valid(boarddata->wp_gpio))
-		return gpio_get_value(boarddata->wp_gpio);
-	else
-		return -ENOSYS;
-}
-
 static irqreturn_t cd_irq(int irq, void *data)
 {
 	struct sdhci_host *sdhost = (struct sdhci_host *)data;
@@ -272,23 +275,34 @@ static int __devinit sdhci_esdhc_imx_probe(struct platform_device *pdev)
 	if (!cpu_is_mx25())
 		host->quirks |= SDHCI_QUIRK_BROKEN_TIMEOUT_VAL;
 
-	if (cpu_is_mx25() || cpu_is_mx35()) {
-		/* write_protect can't be routed to controller, use gpio */
-		sdhci_esdhc_ops.get_ro = esdhc_pltfm_get_ro;
-	}
-
 	if (!(cpu_is_mx25() || cpu_is_mx35() || cpu_is_mx51()))
 		imx_data->flags |= ESDHC_FLAG_MULTIBLK_NO_INT;
 
 	boarddata = host->mmc->parent->platform_data;
-	if (boarddata) {
+	if (!boarddata) {
+		dev_err(mmc_dev(host->mmc), "no board data!\n");
+		err = -EINVAL;
+		goto no_board_data;
+	}
+
+	/* write_protect */
+	if (boarddata->wp_type == ESDHC_WP_GPIO) {
 		err = gpio_request_one(boarddata->wp_gpio, GPIOF_IN, "ESDHC_WP");
 		if (err) {
 			dev_warn(mmc_dev(host->mmc),
-				"no write-protect pin available!\n");
-			boarddata->wp_gpio = err;
+				 "no write-protect pin available!\n");
+			boarddata->wp_gpio = -EINVAL;
 		}
+	} else {
+		boarddata->wp_gpio = -EINVAL;
+	}
 
+	/* card_detect */
+	if (boarddata->cd_type != ESDHC_CD_GPIO)
+		boarddata->cd_gpio = -EINVAL;
+
+	switch (boarddata->cd_type) {
+	case ESDHC_CD_GPIO:
 		err = gpio_request_one(boarddata->cd_gpio, GPIOF_IN, "ESDHC_CD");
 		if (err) {
 			dev_warn(mmc_dev(host->mmc),
@@ -296,10 +310,6 @@ static int __devinit sdhci_esdhc_imx_probe(struct platform_device *pdev)
 			goto no_card_detect_pin;
 		}
 
-		/* i.MX5x has issues to be researched */
-		if (!cpu_is_mx25() && !cpu_is_mx35())
-			goto not_supported;
-
 		err = request_irq(gpio_to_irq(boarddata->cd_gpio), cd_irq,
 				 IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING,
 				 mmc_hostname(host->mmc), host);
@@ -307,10 +317,19 @@ static int __devinit sdhci_esdhc_imx_probe(struct platform_device *pdev)
 			dev_warn(mmc_dev(host->mmc), "request irq error\n");
 			goto no_card_detect_irq;
 		}
+		/* fall through */
 
-		imx_data->flags |= ESDHC_FLAG_GPIO_FOR_CD;
-		/* Now we have a working card_detect again */
+	case ESDHC_CD_CONTROLLER:
+		/* we have a working card_detect back */
 		host->quirks &= ~SDHCI_QUIRK_BROKEN_CARD_DETECTION;
+		break;
+
+	case ESDHC_CD_PERMANENT:
+		host->mmc->caps = MMC_CAP_NONREMOVABLE;
+		break;
+
+	case ESDHC_CD_NONE:
+		break;
 	}
 
 	err = sdhci_add_host(host);
@@ -319,16 +338,20 @@ static int __devinit sdhci_esdhc_imx_probe(struct platform_device *pdev)
 
 	return 0;
 
- no_card_detect_irq:
-	gpio_free(boarddata->cd_gpio);
- no_card_detect_pin:
-	boarddata->cd_gpio = err;
- not_supported:
-	kfree(imx_data);
- err_add_host:
+err_add_host:
+	if (gpio_is_valid(boarddata->cd_gpio))
+		free_irq(gpio_to_irq(boarddata->cd_gpio), host);
+no_card_detect_irq:
+	if (gpio_is_valid(boarddata->cd_gpio))
+		gpio_free(boarddata->cd_gpio);
+	if (gpio_is_valid(boarddata->wp_gpio))
+		gpio_free(boarddata->wp_gpio);
+no_card_detect_pin:
+no_board_data:
 	clk_disable(pltfm_host->clk);
 	clk_put(pltfm_host->clk);
- err_clk_get:
+err_clk_get:
+	kfree(imx_data);
 	sdhci_pltfm_free(pdev);
 	return err;
 }
@@ -343,14 +366,12 @@ static int __devexit sdhci_esdhc_imx_remove(struct platform_device *pdev)
 
 	sdhci_remove_host(host, dead);
 
-	if (boarddata && gpio_is_valid(boarddata->wp_gpio))
+	if (gpio_is_valid(boarddata->wp_gpio))
 		gpio_free(boarddata->wp_gpio);
 
-	if (boarddata && gpio_is_valid(boarddata->cd_gpio)) {
+	if (gpio_is_valid(boarddata->cd_gpio)) {
+		free_irq(gpio_to_irq(boarddata->cd_gpio), host);
 		gpio_free(boarddata->cd_gpio);
-
-		if (!(host->quirks & SDHCI_QUIRK_BROKEN_CARD_DETECTION))
-			free_irq(gpio_to_irq(boarddata->cd_gpio), host);
 	}
 
 	clk_disable(pltfm_host->clk);
-- 
1.7.4.1

[PATCH v2 2/4] mmc: sdhci-esdhc-imx: SDHCI_CARD_PRESENT does not get cleared

[Wolfram Sang]

On Wed, Jun 15, 2011 at 07:15:20PM +0800, Shawn Guo wrote:
> The function esdhc_readl_le intends to clear bit SDHCI_CARD_PRESENT,
> when the card detect gpio tells there is no card.  But it does not
> clear the bit actually.  The patch gives a fix on that.
> 
> Signed-off-by: Shawn Guo <shawn.guo@linaro.org>

Acked-by: Wolfram Sang <w.sang@pengutronix.de>

Should go to stable...

-- 
Pengutronix e.K.                           | Wolfram Sang                |
Industrial Linux Solutions                 | http://www.pengutronix.de/  |
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: application/pgp-signature
Size: 198 bytes
Desc: Digital signature
URL: <http://lists.infradead.org/pipermail/linux-arm-kernel/attachments/20110616/32f4b62b/attachment.sig>

[PATCH v2 4/4] mmc: sdhci-esdhc-imx: extend card_detect and write_protect support for mx5

[Wolfram Sang]

On Wed, Jun 15, 2011 at 07:15:22PM +0800, Shawn Guo wrote:
> The patch extends card_detect and write_protect support to get mx5
> family and more scenarios supported.  The changes include:
> 
>  * Turn platform_data from optional to mandatory
>  * Add cd_types and wp_types into platform_data to cover more use
>    cases
>  * Remove the use of flag ESDHC_FLAG_GPIO_FOR_CD
>  * Adjust some machine codes to adopt the platform_data changes
> 
> With this patch, card_detect and write_protect gets supported on
> mx5 based platforms.
> 
> Signed-off-by: Shawn Guo <shawn.guo@linaro.org>

Looks like right direction to me, so far; some testers would be good,
though.

Acked-by: Wolfram Sang <w.sang@pengutronix.de>

-- 
Pengutronix e.K.                           | Wolfram Sang                |
Industrial Linux Solutions                 | http://www.pengutronix.de/  |
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: application/pgp-signature
Size: 198 bytes
Desc: Digital signature
URL: <http://lists.infradead.org/pipermail/linux-arm-kernel/attachments/20110616/b8d30372/attachment.sig>

[PATCH v2 4/4 RESEND] mmc: sdhci-esdhc-imx: extend card_detect and write_protect support for mx5

[Shawn Guo]

The patch extends card_detect and write_protect support to get mx5
family and more scenarios supported.  The changes include:

 * Turn platform_data from optional to mandatory
 * Add cd_types and wp_types into platform_data to cover more use
   cases
 * Remove the use of flag ESDHC_FLAG_GPIO_FOR_CD
 * Adjust some machine codes to adopt the platform_data changes

With this patch, card_detect and write_protect gets supported on
mx5 based platforms.

Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Acked-by: Wolfram Sang <w.sang@pengutronix.de>
---
Changes for resend:
 * Fix the warning below:
  CC      drivers/mmc/host/sdhci-esdhc-imx.o
drivers/mmc/host/sdhci-esdhc-imx.c: In function 'esdhc_pltfm_get_ro':
drivers/mmc/host/sdhci-esdhc-imx.c:215:1: warning: control reaches end of non-void function

 * Add Wolfram's Acked-by

 arch/arm/mach-imx/eukrea_mbimxsd25-baseboard.c     |    3 +-
 arch/arm/mach-imx/eukrea_mbimxsd35-baseboard.c     |    3 +-
 arch/arm/mach-imx/mach-mx25_3ds.c                  |    2 +
 arch/arm/mach-imx/mach-pcm043.c                    |    2 +
 arch/arm/mach-mx5/board-mx51_babbage.c             |   14 ++-
 arch/arm/mach-mx5/board-mx53_loco.c                |    4 +
 .../plat-mxc/devices/platform-sdhci-esdhc-imx.c    |   12 ++
 arch/arm/plat-mxc/include/mach/esdhc.h             |   25 ++++-
 drivers/mmc/host/sdhci-esdhc-imx.c                 |  123 ++++++++++++--------
 9 files changed, 126 insertions(+), 62 deletions(-)

diff --git a/arch/arm/mach-imx/eukrea_mbimxsd25-baseboard.c b/arch/arm/mach-imx/eukrea_mbimxsd25-baseboard.c
index 01ebcb3..66e8726 100644
--- a/arch/arm/mach-imx/eukrea_mbimxsd25-baseboard.c
+++ b/arch/arm/mach-imx/eukrea_mbimxsd25-baseboard.c
@@ -225,7 +225,8 @@ struct imx_ssi_platform_data eukrea_mbimxsd_ssi_pdata __initconst = {
 
 static struct esdhc_platform_data sd1_pdata = {
 	.cd_gpio = GPIO_SD1CD,
-	.wp_gpio = -EINVAL,
+	.cd_type = ESDHC_CD_GPIO,
+	.wp_type = ESDHC_WP_NONE,
 };
 
 /*
diff --git a/arch/arm/mach-imx/eukrea_mbimxsd35-baseboard.c b/arch/arm/mach-imx/eukrea_mbimxsd35-baseboard.c
index 558eb52..0f0af02 100644
--- a/arch/arm/mach-imx/eukrea_mbimxsd35-baseboard.c
+++ b/arch/arm/mach-imx/eukrea_mbimxsd35-baseboard.c
@@ -236,7 +236,8 @@ struct imx_ssi_platform_data eukrea_mbimxsd_ssi_pdata __initconst = {
 
 static struct esdhc_platform_data sd1_pdata = {
 	.cd_gpio = GPIO_SD1CD,
-	.wp_gpio = -EINVAL,
+	.cd_type = ESDHC_CD_GPIO,
+	.wp_type = ESDHC_WP_NONE,
 };
 
 /*
diff --git a/arch/arm/mach-imx/mach-mx25_3ds.c b/arch/arm/mach-imx/mach-mx25_3ds.c
index 01534bb..7f66a91 100644
--- a/arch/arm/mach-imx/mach-mx25_3ds.c
+++ b/arch/arm/mach-imx/mach-mx25_3ds.c
@@ -215,6 +215,8 @@ static const struct imxi2c_platform_data mx25_3ds_i2c0_data __initconst = {
 static const struct esdhc_platform_data mx25pdk_esdhc_pdata __initconst = {
 	.wp_gpio = SD1_GPIO_WP,
 	.cd_gpio = SD1_GPIO_CD,
+	.wp_type = ESDHC_WP_GPIO,
+	.cd_type = ESDHC_CD_GPIO,
 };
 
 static void __init mx25pdk_init(void)
diff --git a/arch/arm/mach-imx/mach-pcm043.c b/arch/arm/mach-imx/mach-pcm043.c
index 163cc31..660ec3e 100644
--- a/arch/arm/mach-imx/mach-pcm043.c
+++ b/arch/arm/mach-imx/mach-pcm043.c
@@ -349,6 +349,8 @@ __setup("otg_mode=", pcm043_otg_mode);
 static struct esdhc_platform_data sd1_pdata = {
 	.wp_gpio = SD1_GPIO_WP,
 	.cd_gpio = SD1_GPIO_CD,
+	.wp_type = ESDHC_WP_GPIO,
+	.cd_type = ESDHC_CD_GPIO,
 };
 
 /*
diff --git a/arch/arm/mach-mx5/board-mx51_babbage.c b/arch/arm/mach-mx5/board-mx51_babbage.c
index 15c6000..e400b09 100644
--- a/arch/arm/mach-mx5/board-mx51_babbage.c
+++ b/arch/arm/mach-mx5/board-mx51_babbage.c
@@ -41,8 +41,6 @@
 #define BABBAGE_POWER_KEY	IMX_GPIO_NR(2, 21)
 #define BABBAGE_ECSPI1_CS0	IMX_GPIO_NR(4, 24)
 #define BABBAGE_ECSPI1_CS1	IMX_GPIO_NR(4, 25)
-#define BABBAGE_SD1_CD		IMX_GPIO_NR(1, 0)
-#define BABBAGE_SD1_WP		IMX_GPIO_NR(1, 1)
 #define BABBAGE_SD2_CD		IMX_GPIO_NR(1, 6)
 #define BABBAGE_SD2_WP		IMX_GPIO_NR(1, 5)
 
@@ -146,8 +144,9 @@ static iomux_v3_cfg_t mx51babbage_pads[] = {
 	MX51_PAD_SD1_DATA1__SD1_DATA1,
 	MX51_PAD_SD1_DATA2__SD1_DATA2,
 	MX51_PAD_SD1_DATA3__SD1_DATA3,
-	MX51_PAD_GPIO1_0__GPIO1_0,
-	MX51_PAD_GPIO1_1__GPIO1_1,
+	/* CD/WP from controller */
+	MX51_PAD_GPIO1_0__SD1_CD,
+	MX51_PAD_GPIO1_1__SD1_WP,
 
 	/* SD 2 */
 	MX51_PAD_SD2_CMD__SD2_CMD,
@@ -156,6 +155,7 @@ static iomux_v3_cfg_t mx51babbage_pads[] = {
 	MX51_PAD_SD2_DATA1__SD2_DATA1,
 	MX51_PAD_SD2_DATA2__SD2_DATA2,
 	MX51_PAD_SD2_DATA3__SD2_DATA3,
+	/* CD/WP gpio */
 	MX51_PAD_GPIO1_6__GPIO1_6,
 	MX51_PAD_GPIO1_5__GPIO1_5,
 
@@ -340,13 +340,15 @@ static const struct spi_imx_master mx51_babbage_spi_pdata __initconst = {
 };
 
 static const struct esdhc_platform_data mx51_babbage_sd1_data __initconst = {
-	.cd_gpio = BABBAGE_SD1_CD,
-	.wp_gpio = BABBAGE_SD1_WP,
+	.cd_type = ESDHC_CD_CONTROLLER,
+	.wp_type = ESDHC_WP_CONTROLLER,
 };
 
 static const struct esdhc_platform_data mx51_babbage_sd2_data __initconst = {
 	.cd_gpio = BABBAGE_SD2_CD,
 	.wp_gpio = BABBAGE_SD2_WP,
+	.cd_type = ESDHC_CD_GPIO,
+	.wp_type = ESDHC_WP_GPIO,
 };
 
 /*
diff --git a/arch/arm/mach-mx5/board-mx53_loco.c b/arch/arm/mach-mx5/board-mx53_loco.c
index 54be525..4e1d51d 100644
--- a/arch/arm/mach-mx5/board-mx53_loco.c
+++ b/arch/arm/mach-mx5/board-mx53_loco.c
@@ -210,11 +210,15 @@ static const struct gpio_keys_platform_data loco_button_data __initconst = {
 
 static const struct esdhc_platform_data mx53_loco_sd1_data __initconst = {
 	.cd_gpio = LOCO_SD1_CD,
+	.cd_type = ESDHC_CD_GPIO,
+	.wp_type = ESDHC_WP_NONE,
 };
 
 static const struct esdhc_platform_data mx53_loco_sd3_data __initconst = {
 	.cd_gpio = LOCO_SD3_CD,
 	.wp_gpio = LOCO_SD3_WP,
+	.cd_type = ESDHC_CD_GPIO,
+	.wp_type = ESDHC_WP_GPIO,
 };
 
 static inline void mx53_loco_fec_reset(void)
diff --git a/arch/arm/plat-mxc/devices/platform-sdhci-esdhc-imx.c b/arch/arm/plat-mxc/devices/platform-sdhci-esdhc-imx.c
index 6b2940b..79d6d71 100644
--- a/arch/arm/plat-mxc/devices/platform-sdhci-esdhc-imx.c
+++ b/arch/arm/plat-mxc/devices/platform-sdhci-esdhc-imx.c
@@ -65,6 +65,11 @@ imx53_sdhci_esdhc_imx_data[] __initconst = {
 };
 #endif /* ifdef CONFIG_SOC_IMX53 */
 
+static const struct esdhc_platform_data default_esdhc_pdata __initconst = {
+	.wp_type = ESDHC_WP_NONE,
+	.cd_type = ESDHC_CD_NONE,
+};
+
 struct platform_device *__init imx_add_sdhci_esdhc_imx(
 		const struct imx_sdhci_esdhc_imx_data *data,
 		const struct esdhc_platform_data *pdata)
@@ -81,6 +86,13 @@ struct platform_device *__init imx_add_sdhci_esdhc_imx(
 		},
 	};
 
+	/*
+	 * If machine does not provide pdata, use the default one
+	 * which means no WP/CD support
+	 */
+	if (!pdata)
+		pdata = &default_esdhc_pdata;
+
 	return imx_add_platform_device("sdhci-esdhc-imx", data->id, res,
 			ARRAY_SIZE(res), pdata, sizeof(*pdata));
 }
diff --git a/arch/arm/plat-mxc/include/mach/esdhc.h b/arch/arm/plat-mxc/include/mach/esdhc.h
index 86003f4..aaf9748 100644
--- a/arch/arm/plat-mxc/include/mach/esdhc.h
+++ b/arch/arm/plat-mxc/include/mach/esdhc.h
@@ -10,17 +10,34 @@
 #ifndef __ASM_ARCH_IMX_ESDHC_H
 #define __ASM_ARCH_IMX_ESDHC_H
 
+enum wp_types {
+	ESDHC_WP_NONE,		/* no WP, neither controller nor gpio */
+	ESDHC_WP_CONTROLLER,	/* mmc controller internal WP */
+	ESDHC_WP_GPIO,		/* external gpio pin for WP */
+};
+
+enum cd_types {
+	ESDHC_CD_NONE,		/* no CD, neither controller nor gpio */
+	ESDHC_CD_CONTROLLER,	/* mmc controller internal CD */
+	ESDHC_CD_GPIO,		/* external gpio pin for CD */
+	ESDHC_CD_PERMANENT,	/* no CD, card permanently wired to host */
+};
+
 /**
- * struct esdhc_platform_data - optional platform data for esdhc on i.MX
+ * struct esdhc_platform_data - platform data for esdhc on i.MX
  *
- * strongly recommended for i.MX25/35, not needed for other variants
+ * ESDHC_WP(CD)_CONTROLLER type is not available on i.MX25/35.
  *
- * @wp_gpio:	gpio for write_protect (-EINVAL if unused)
- * @cd_gpio:	gpio for card_detect interrupt (-EINVAL if unused)
+ * @wp_gpio:	gpio for write_protect
+ * @cd_gpio:	gpio for card_detect interrupt
+ * @wp_type:	type of write_protect method (see wp_types enum above)
+ * @cd_type:	type of card_detect method (see cd_types enum above)
  */
 
 struct esdhc_platform_data {
 	unsigned int wp_gpio;
 	unsigned int cd_gpio;
+	enum wp_types wp_type;
+	enum cd_types cd_type;
 };
 #endif /* __ASM_ARCH_IMX_ESDHC_H */
diff --git a/drivers/mmc/host/sdhci-esdhc-imx.c b/drivers/mmc/host/sdhci-esdhc-imx.c
index 79b7a9a..91d9579 100644
--- a/drivers/mmc/host/sdhci-esdhc-imx.c
+++ b/drivers/mmc/host/sdhci-esdhc-imx.c
@@ -29,7 +29,6 @@
 #define SDHCI_VENDOR_SPEC		0xC0
 #define  SDHCI_VENDOR_SPEC_SDIO_QUIRK	0x00000002
 
-#define ESDHC_FLAG_GPIO_FOR_CD		(1 << 0)
 /*
  * The CMDTYPE of the CMD register (offset 0xE) should be set to
  * "11" when the STOP CMD12 is issued on imx53 to abort one
@@ -70,19 +69,15 @@ static inline void esdhc_clrset_le(struct sdhci_host *host, u32 mask, u32 val, i
 
 static u32 esdhc_readl_le(struct sdhci_host *host, int reg)
 {
-	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
-	struct pltfm_imx_data *imx_data = pltfm_host->priv;
+	struct esdhc_platform_data *boarddata =
+			host->mmc->parent->platform_data;
 
-	/* fake CARD_PRESENT flag on mx25/35 */
+	/* fake CARD_PRESENT flag */
 	u32 val = readl(host->ioaddr + reg);
 
 	if (unlikely((reg == SDHCI_PRESENT_STATE)
-			&& (imx_data->flags & ESDHC_FLAG_GPIO_FOR_CD))) {
-		struct esdhc_platform_data *boarddata =
-				host->mmc->parent->platform_data;
-
-		if (boarddata && gpio_is_valid(boarddata->cd_gpio)
-				&& gpio_get_value(boarddata->cd_gpio))
+			&& gpio_is_valid(boarddata->cd_gpio))) {
+		if (gpio_get_value(boarddata->cd_gpio))
 			/* no card, if a valid gpio says so... */
 			val &= ~SDHCI_CARD_PRESENT;
 		else
@@ -97,12 +92,13 @@ static void esdhc_writel_le(struct sdhci_host *host, u32 val, int reg)
 {
 	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
 	struct pltfm_imx_data *imx_data = pltfm_host->priv;
+	struct esdhc_platform_data *boarddata =
+			host->mmc->parent->platform_data;
 
 	if (unlikely((reg == SDHCI_INT_ENABLE || reg == SDHCI_SIGNAL_ENABLE)
-			&& (imx_data->flags & ESDHC_FLAG_GPIO_FOR_CD)))
+			&& (boarddata->cd_type == ESDHC_CD_GPIO)))
 		/*
 		 * these interrupts won't work with a custom card_detect gpio
-		 * (only applied to mx25/35)
 		 */
 		val &= ~(SDHCI_INT_CARD_REMOVE | SDHCI_INT_CARD_INSERT);
 
@@ -201,6 +197,25 @@ static unsigned int esdhc_pltfm_get_min_clock(struct sdhci_host *host)
 	return clk_get_rate(pltfm_host->clk) / 256 / 16;
 }
 
+static unsigned int esdhc_pltfm_get_ro(struct sdhci_host *host)
+{
+	struct esdhc_platform_data *boarddata =
+			host->mmc->parent->platform_data;
+
+	switch (boarddata->wp_type) {
+	case ESDHC_WP_GPIO:
+		if (gpio_is_valid(boarddata->wp_gpio))
+			return gpio_get_value(boarddata->wp_gpio);
+	case ESDHC_WP_CONTROLLER:
+		return !(readl(host->ioaddr + SDHCI_PRESENT_STATE) &
+			       SDHCI_WRITE_PROTECT);
+	case ESDHC_WP_NONE:
+		break;
+	}
+
+	return -ENOSYS;
+}
+
 static struct sdhci_ops sdhci_esdhc_ops = {
 	.read_l = esdhc_readl_le,
 	.read_w = esdhc_readw_le,
@@ -212,6 +227,7 @@ static struct sdhci_ops sdhci_esdhc_ops = {
 	.get_min_clock = esdhc_pltfm_get_min_clock,
 	.get_max_blk_size = esdhc_pltfm_get_max_blk_size,
 	.get_max_blk_count = esdhc_pltfm_get_max_blk_count,
+	.get_ro = esdhc_pltfm_get_ro,
 };
 
 static struct sdhci_pltfm_data sdhci_esdhc_imx_pdata = {
@@ -221,17 +237,6 @@ static struct sdhci_pltfm_data sdhci_esdhc_imx_pdata = {
 	.ops = &sdhci_esdhc_ops,
 };
 
-static unsigned int esdhc_pltfm_get_ro(struct sdhci_host *host)
-{
-	struct esdhc_platform_data *boarddata =
-			host->mmc->parent->platform_data;
-
-	if (boarddata && gpio_is_valid(boarddata->wp_gpio))
-		return gpio_get_value(boarddata->wp_gpio);
-	else
-		return -ENOSYS;
-}
-
 static irqreturn_t cd_irq(int irq, void *data)
 {
 	struct sdhci_host *sdhost = (struct sdhci_host *)data;
@@ -272,23 +277,34 @@ static int __devinit sdhci_esdhc_imx_probe(struct platform_device *pdev)
 	if (!cpu_is_mx25())
 		host->quirks |= SDHCI_QUIRK_BROKEN_TIMEOUT_VAL;
 
-	if (cpu_is_mx25() || cpu_is_mx35()) {
-		/* write_protect can't be routed to controller, use gpio */
-		sdhci_esdhc_ops.get_ro = esdhc_pltfm_get_ro;
-	}
-
 	if (!(cpu_is_mx25() || cpu_is_mx35() || cpu_is_mx51()))
 		imx_data->flags |= ESDHC_FLAG_MULTIBLK_NO_INT;
 
 	boarddata = host->mmc->parent->platform_data;
-	if (boarddata) {
+	if (!boarddata) {
+		dev_err(mmc_dev(host->mmc), "no board data!\n");
+		err = -EINVAL;
+		goto no_board_data;
+	}
+
+	/* write_protect */
+	if (boarddata->wp_type == ESDHC_WP_GPIO) {
 		err = gpio_request_one(boarddata->wp_gpio, GPIOF_IN, "ESDHC_WP");
 		if (err) {
 			dev_warn(mmc_dev(host->mmc),
-				"no write-protect pin available!\n");
-			boarddata->wp_gpio = err;
+				 "no write-protect pin available!\n");
+			boarddata->wp_gpio = -EINVAL;
 		}
+	} else {
+		boarddata->wp_gpio = -EINVAL;
+	}
 
+	/* card_detect */
+	if (boarddata->cd_type != ESDHC_CD_GPIO)
+		boarddata->cd_gpio = -EINVAL;
+
+	switch (boarddata->cd_type) {
+	case ESDHC_CD_GPIO:
 		err = gpio_request_one(boarddata->cd_gpio, GPIOF_IN, "ESDHC_CD");
 		if (err) {
 			dev_warn(mmc_dev(host->mmc),
@@ -296,10 +312,6 @@ static int __devinit sdhci_esdhc_imx_probe(struct platform_device *pdev)
 			goto no_card_detect_pin;
 		}
 
-		/* i.MX5x has issues to be researched */
-		if (!cpu_is_mx25() && !cpu_is_mx35())
-			goto not_supported;
-
 		err = request_irq(gpio_to_irq(boarddata->cd_gpio), cd_irq,
 				 IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING,
 				 mmc_hostname(host->mmc), host);
@@ -307,10 +319,19 @@ static int __devinit sdhci_esdhc_imx_probe(struct platform_device *pdev)
 			dev_warn(mmc_dev(host->mmc), "request irq error\n");
 			goto no_card_detect_irq;
 		}
+		/* fall through */
 
-		imx_data->flags |= ESDHC_FLAG_GPIO_FOR_CD;
-		/* Now we have a working card_detect again */
+	case ESDHC_CD_CONTROLLER:
+		/* we have a working card_detect back */
 		host->quirks &= ~SDHCI_QUIRK_BROKEN_CARD_DETECTION;
+		break;
+
+	case ESDHC_CD_PERMANENT:
+		host->mmc->caps = MMC_CAP_NONREMOVABLE;
+		break;
+
+	case ESDHC_CD_NONE:
+		break;
 	}
 
 	err = sdhci_add_host(host);
@@ -319,16 +340,20 @@ static int __devinit sdhci_esdhc_imx_probe(struct platform_device *pdev)
 
 	return 0;
 
- no_card_detect_irq:
-	gpio_free(boarddata->cd_gpio);
- no_card_detect_pin:
-	boarddata->cd_gpio = err;
- not_supported:
-	kfree(imx_data);
- err_add_host:
+err_add_host:
+	if (gpio_is_valid(boarddata->cd_gpio))
+		free_irq(gpio_to_irq(boarddata->cd_gpio), host);
+no_card_detect_irq:
+	if (gpio_is_valid(boarddata->cd_gpio))
+		gpio_free(boarddata->cd_gpio);
+	if (gpio_is_valid(boarddata->wp_gpio))
+		gpio_free(boarddata->wp_gpio);
+no_card_detect_pin:
+no_board_data:
 	clk_disable(pltfm_host->clk);
 	clk_put(pltfm_host->clk);
- err_clk_get:
+err_clk_get:
+	kfree(imx_data);
 	sdhci_pltfm_free(pdev);
 	return err;
 }
@@ -343,14 +368,12 @@ static int __devexit sdhci_esdhc_imx_remove(struct platform_device *pdev)
 
 	sdhci_remove_host(host, dead);
 
-	if (boarddata && gpio_is_valid(boarddata->wp_gpio))
+	if (gpio_is_valid(boarddata->wp_gpio))
 		gpio_free(boarddata->wp_gpio);
 
-	if (boarddata && gpio_is_valid(boarddata->cd_gpio)) {
+	if (gpio_is_valid(boarddata->cd_gpio)) {
+		free_irq(gpio_to_irq(boarddata->cd_gpio), host);
 		gpio_free(boarddata->cd_gpio);
-
-		if (!(host->quirks & SDHCI_QUIRK_BROKEN_CARD_DETECTION))
-			free_irq(gpio_to_irq(boarddata->cd_gpio), host);
 	}
 
 	clk_disable(pltfm_host->clk);
-- 
1.7.4.1