dm: mmc: sdhci: Support CONFIG_BLK and CONFIG_DM_MMC_OPS

Add support for using driver model for block devices and MMC operations in
this driver.

Signed-off-by: Simon Glass <sjg@chromium.org>

drivers/mmc/sdhci.c

@@ -130,9 +130,17 @@ static int sdhci_transfer_data(struct sdhci_host *host, struct mmc_data *data,
 #define CONFIG_SDHCI_CMD_DEFAULT_TIMEOUT	100
 #define SDHCI_READ_STATUS_TIMEOUT		1000
 
+#ifdef CONFIG_DM_MMC_OPS
+static int sdhci_send_command(struct udevice *dev, struct mmc_cmd *cmd,
+			      struct mmc_data *data)
+{
+	struct mmc *mmc = mmc_get_mmc_dev(dev);
+
+#else
 static int sdhci_send_command(struct mmc *mmc, struct mmc_cmd *cmd,
-		       struct mmc_data *data)
+			      struct mmc_data *data)
 {
+#endif
 	struct sdhci_host *host = mmc->priv;
 	unsigned int stat = 0;
 	int ret = 0;
@@ -390,8 +398,14 @@ static void sdhci_set_power(struct sdhci_host *host, unsigned short power)
 	sdhci_writeb(host, pwr, SDHCI_POWER_CONTROL);
 }
 
+#ifdef CONFIG_DM_MMC_OPS
+static int sdhci_set_ios(struct udevice *dev)
+{
+	struct mmc *mmc = mmc_get_mmc_dev(dev);
+#else
 static void sdhci_set_ios(struct mmc *mmc)
 {
+#endif
 	u32 ctrl;
 	struct sdhci_host *host = mmc->priv;
 
@@ -427,6 +441,9 @@ static void sdhci_set_ios(struct mmc *mmc)
 		ctrl &= ~SDHCI_CTRL_HISPD;
 
 	sdhci_writeb(host, ctrl, SDHCI_HOST_CONTROL);
+#ifdef CONFIG_DM_MMC_OPS
+	return 0;
+#endif
 }
 
 static int sdhci_init(struct mmc *mmc)
@@ -473,12 +490,25 @@ static int sdhci_init(struct mmc *mmc)
 	return 0;
 }
 
+#ifdef CONFIG_DM_MMC_OPS
+int sdhci_probe(struct udevice *dev)
+{
+	struct mmc *mmc = mmc_get_mmc_dev(dev);
+
+	return sdhci_init(mmc);
+}
 
+const struct dm_mmc_ops sdhci_ops = {
+	.send_cmd	= sdhci_send_command,
+	.set_ios	= sdhci_set_ios,
+};
+#else
 static const struct mmc_ops sdhci_ops = {
 	.send_cmd	= sdhci_send_command,
 	.set_ios	= sdhci_set_ios,
 	.init		= sdhci_init,
 };
+#endif
 
 int sdhci_setup_cfg(struct mmc_config *cfg, const char *name, int buswidth,
 		    uint caps, u32 max_clk, u32 min_clk, uint version,
@@ -529,11 +559,18 @@ int sdhci_setup_cfg(struct mmc_config *cfg, const char *name, int buswidth,
 	if (host_caps)
 		cfg->host_caps |= host_caps;
 
+
 	cfg->b_max = CONFIG_SYS_MMC_MAX_BLK_COUNT;
 
 	return 0;
 }
 
+#ifdef CONFIG_BLK
+int sdhci_bind(struct udevice *dev, struct mmc *mmc, struct mmc_config *cfg)
+{
+	return mmc_bind(dev, mmc, cfg);
+}
+#else
 int add_sdhci(struct sdhci_host *host, u32 max_clk, u32 min_clk)
 {
 	unsigned int caps;
@@ -568,3 +605,4 @@ int add_sdhci(struct sdhci_host *host, u32 max_clk, u32 min_clk)
 
 	return 0;
 }
+#endif

include/sdhci.h

@@ -338,5 +338,85 @@ static inline u8 sdhci_readb(struct sdhci_host *host, int reg)
 }
 #endif
 
+#ifdef CONFIG_BLK
+/**
+ * sdhci_setup_cfg() - Set up the configuration for DWMMC
+ *
+ * This is used to set up an SDHCI device when you are using CONFIG_BLK.
+ *
+ * This should be called from your MMC driver's probe() method once you have
+ * the information required.
+ *
+ * Generally your driver will have a platform data structure which holds both
+ * the configuration (struct mmc_config) and the MMC device info (struct mmc).
+ * For example:
+ *
+ * struct msm_sdhc_plat {
+ *	struct mmc_config cfg;
+ *	struct mmc mmc;
+ * };
+ *
+ * ...
+ *
+ * Inside U_BOOT_DRIVER():
+ *	.platdata_auto_alloc_size = sizeof(struct msm_sdhc_plat),
+ *
+ * To access platform data:
+ *	struct msm_sdhc_plat *plat = dev_get_platdata(dev);
+ *
+ * See msm_sdhci.c for an example.
+ *
+ * @cfg:	Configuration structure to fill in (generally &plat->mmc)
+ * @name:	Device name (normally dev->name)
+ * @buswidth:	Bus width (in bits, such as 4 or 8)
+ * @caps:	Host capabilities (MMC_MODE_...)
+ * @max_clk:	Maximum supported clock speed in HZ (0 for default)
+ * @min_clk:	Minimum supported clock speed in HZ (0 for default)
+ * @version:	Host controller version (generally read from the
+ *		SDHCI_HOST_VERSION register)
+ * @quirks:	Quick flags (SDHCI_QUIRK_...)
+ * @host_caps:	Additional host capabilities (0 if none)
+ */
+int sdhci_setup_cfg(struct mmc_config *cfg, const char *name, int buswidth,
+		    uint caps, u32 max_clk, u32 min_clk, uint version,
+		    uint quirks, uint host_caps);
+
+/**
+ * sdhci_bind() - Set up a new MMC block device
+ *
+ * This is used to set up an SDHCI block device when you are using CONFIG_BLK.
+ * It should be called from your driver's bind() method.
+ *
+ * See msm_sdhci.c for an example.
+ *
+ * @dev:	Device to set up
+ * @mmc:	Pointer to mmc structure (normally &plat->mmc)
+ * @cfg:	Empty configuration structure (generally &plat->cfg). This is
+ *		normally all zeroes at this point. The only purpose of passing
+ *		this in is to set mmc->cfg to it.
+ * @return 0 if OK, -ve if the block device could not be created
+ */
+int sdhci_bind(struct udevice *dev, struct mmc *mmc, struct mmc_config *cfg);
+#else
+
+/**
+ * add_sdhci() - Add a new SDHCI interface
+ *
+ * This is used when you are not using CONFIG_BLK. Convert your driver over!
+ *
+ * @host:	SDHCI host structure
+ * @max_clk:	Maximum supported clock speed in HZ (0 for default)
+ * @min_clk:	Minimum supported clock speed in HZ (0 for default)
+ * @return 0 if OK, -ve on error
+ */
 int add_sdhci(struct sdhci_host *host, u32 max_clk, u32 min_clk);
+#endif /* !CONFIG_BLK */
+
+#ifdef CONFIG_DM_MMC_OPS
+/* Export the operations to drivers */
+int sdhci_probe(struct udevice *dev);
+extern const struct dm_mmc_ops sdhci_ops;
+#else
+#endif
+
 #endif /* __SDHCI_HW_H */