diff options
author | Pierre Ossman <drzeus@drzeus.cx> | 2007-05-22 18:25:21 (GMT) |
---|---|---|
committer | Pierre Ossman <drzeus@drzeus.cx> | 2007-09-23 17:42:37 (GMT) |
commit | b2bcc798bbb482b2909801280f3c4aff8cbbf5be (patch) | |
tree | 74b1b4e6876fbc7187f67cc2b36ed03ae7c59acc | |
parent | 5c4e6f1301649d5b29dd0f70e6da83e728ab5ca5 (diff) | |
download | linux-fsl-qoriq-b2bcc798bbb482b2909801280f3c4aff8cbbf5be.tar.xz |
mmc: implement SDIO IO_RW_DIRECT operation
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
-rw-r--r-- | drivers/mmc/core/sdio_ops.c | 37 | ||||
-rw-r--r-- | drivers/mmc/core/sdio_ops.h | 2 | ||||
-rw-r--r-- | include/linux/mmc/core.h | 1 | ||||
-rw-r--r-- | include/linux/mmc/sdio.h | 34 |
4 files changed, 74 insertions, 0 deletions
diff --git a/drivers/mmc/core/sdio_ops.c b/drivers/mmc/core/sdio_ops.c index d6f9f9d..31233f7 100644 --- a/drivers/mmc/core/sdio_ops.c +++ b/drivers/mmc/core/sdio_ops.c @@ -10,6 +10,7 @@ */ #include <linux/mmc/host.h> +#include <linux/mmc/card.h> #include <linux/mmc/mmc.h> #include <linux/mmc/sdio.h> @@ -47,3 +48,39 @@ int mmc_send_io_op_cond(struct mmc_host *host, u32 ocr, u32 *rocr) return err; } +int mmc_io_rw_direct(struct mmc_card *card, int write, unsigned fn, + unsigned addr, u8 in, u8* out) +{ + struct mmc_command cmd; + int err; + + BUG_ON(!card); + BUG_ON(fn > 7); + + memset(&cmd, 0, sizeof(struct mmc_command)); + + cmd.opcode = SD_IO_RW_DIRECT; + cmd.arg = write ? 0x80000000 : 0x00000000; + cmd.arg |= fn << 28; + cmd.arg |= (write && out) ? 0x08000000 : 0x00000000; + cmd.arg |= addr << 9; + cmd.arg |= in; + cmd.flags = MMC_RSP_R5 | MMC_CMD_AC; + + err = mmc_wait_for_cmd(card->host, &cmd, 0); + if (err) + return err; + + if (cmd.resp[0] & R5_ERROR) + return -EIO; + if (cmd.resp[0] & R5_FUNCTION_NUMBER) + return -EINVAL; + if (cmd.resp[0] & R5_OUT_OF_RANGE) + return -ERANGE; + + if (out) + *out = cmd.resp[0] & 0xFF; + + return 0; +} + diff --git a/drivers/mmc/core/sdio_ops.h b/drivers/mmc/core/sdio_ops.h index d8c9829..f0e9d69 100644 --- a/drivers/mmc/core/sdio_ops.h +++ b/drivers/mmc/core/sdio_ops.h @@ -13,6 +13,8 @@ #define _MMC_SDIO_OPS_H int mmc_send_io_op_cond(struct mmc_host *host, u32 ocr, u32 *rocr); +int mmc_io_rw_direct(struct mmc_card *card, int write, unsigned fn, + unsigned addr, u8 in, u8* out); #endif diff --git a/include/linux/mmc/core.h b/include/linux/mmc/core.h index 8faa436..43a9273 100644 --- a/include/linux/mmc/core.h +++ b/include/linux/mmc/core.h @@ -42,6 +42,7 @@ struct mmc_command { #define MMC_RSP_R2 (MMC_RSP_PRESENT|MMC_RSP_136|MMC_RSP_CRC) #define MMC_RSP_R3 (MMC_RSP_PRESENT) #define MMC_RSP_R4 (MMC_RSP_PRESENT) +#define MMC_RSP_R5 (MMC_RSP_PRESENT|MMC_RSP_CRC|MMC_RSP_OPCODE) #define MMC_RSP_R6 (MMC_RSP_PRESENT|MMC_RSP_CRC|MMC_RSP_OPCODE) #define MMC_RSP_R7 (MMC_RSP_PRESENT|MMC_RSP_CRC|MMC_RSP_OPCODE) diff --git a/include/linux/mmc/sdio.h b/include/linux/mmc/sdio.h index d1a0b15..e5f06de 100644 --- a/include/linux/mmc/sdio.h +++ b/include/linux/mmc/sdio.h @@ -14,6 +14,40 @@ /* SDIO commands type argument response */ #define SD_IO_SEND_OP_COND 5 /* bcr [23:0] OCR R4 */ +#define SD_IO_RW_DIRECT 52 /* ac [31:0] See below R5 */ + +/* + * SD_IO_RW_DIRECT argument format: + * + * [31] R/W flag + * [30:28] Function number + * [27] RAW flag + * [25:9] Register address + * [7:0] Data + */ + +/* + SDIO status in R5 + Type + e : error bit + s : status bit + r : detected and set for the actual command response + x : detected and set during command execution. the host must poll + the card by sending status command in order to read these bits. + Clear condition + a : according to the card state + b : always related to the previous command. Reception of + a valid command will clear it (with a delay of one command) + c : clear by read + */ + +#define R5_COM_CRC_ERROR (1 << 15) /* er, b */ +#define R5_ILLEGAL_COMMAND (1 << 14) /* er, b */ +#define R5_ERROR (1 << 11) /* erx, c */ +#define R5_FUNCTION_NUMBER (1 << 9) /* er, c */ +#define R5_OUT_OF_RANGE (1 << 8) /* er, c */ +#define R5_STATUS(x) (x & 0xCB00) +#define R5_IO_CURRENT_STATE(x) ((x & 0x3000) >> 12) /* s, b */ #endif |