mmc: add generic mmc spi driver
This patch supports mmc/sd card with spi interface. It is based on
the generic mmc framework. It works with SDHC and supports multi
blocks read/write.
The crc checksum on data packet is enabled with the def,
There is a subcomamnd "mmc_spi" to setup spi bus and cs at run time.
Signed-off-by: Thomas Chou <thomas@wytron.com.tw>
Signed-off-by: Andy Fleming <afleming@freescale.com>
diff --git a/include/mmc.h b/include/mmc.h
index fcd0fd1..2cf489f 100644
--- a/include/mmc.h
+++ b/include/mmc.h
@@ -44,6 +44,7 @@
#define MMC_MODE_HS_52MHz 0x010
#define MMC_MODE_4BIT 0x100
#define MMC_MODE_8BIT 0x200
+#define MMC_MODE_SPI 0x400
#define SD_DATA_4BIT 0x00040000
@@ -75,6 +76,8 @@
#define MMC_CMD_WRITE_SINGLE_BLOCK 24
#define MMC_CMD_WRITE_MULTIPLE_BLOCK 25
#define MMC_CMD_APP_CMD 55
+#define MMC_CMD_SPI_READ_OCR 58
+#define MMC_CMD_SPI_CRC_ON_OFF 59
#define SD_CMD_SEND_RELATIVE_ADDR 3
#define SD_CMD_SWITCH_FUNC 6
@@ -291,6 +294,8 @@
#ifdef CONFIG_GENERIC_MMC
int atmel_mci_init(void *regs);
+#define mmc_host_is_spi(mmc) ((mmc)->host_caps & MMC_MODE_SPI)
+struct mmc *mmc_spi_init(uint bus, uint cs, uint speed, uint mode);
#else
int mmc_legacy_init(int verbose);
#endif
