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>

1 files changed, 80 insertions, 0 deletions

diff --git a/include/sdhci.h b/include/sdhci.h
index e0f66670b6..c4d3b552d1 100644
--- a/include/sdhci.h
+++ b/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 */