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[MMC] Indicate that R1/R1b contains command opcode

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Some controllers actually check the first byte of the response (most
don't).  This byte contains the command opcode for R1/R1b and all 1:s
for other types. The difference must be indicated to the controller
so it knows which reply to expect.

Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
This commit is contained in:
Pierre Ossman 2006-01-09 22:51:46 +00:00 committed by Russell King
parent 788ee7b098
commit 7225b3fd0b
1 changed files with 3 additions and 2 deletions
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5
include/linux/mmc/mmc.h
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@ -27,14 +27,15 @@ struct mmc_command {
#define MMC_RSP_MASK (3 << 0)
#define MMC_RSP_CRC (1 << 3) /* expect valid crc */
#define MMC_RSP_BUSY (1 << 4) /* card may send busy */
#define MMC_RSP_OPCODE (1 << 5) /* response contains opcode */
/*
* These are the response types, and correspond to valid bit
* patterns of the above flags. One additional valid pattern
* is all zeros, which means we don't expect a response.
*/
#define MMC_RSP_R1 (MMC_RSP_SHORT|MMC_RSP_CRC)
#define MMC_RSP_R1B (MMC_RSP_SHORT|MMC_RSP_CRC|MMC_RSP_BUSY)
#define MMC_RSP_R1 (MMC_RSP_SHORT|MMC_RSP_CRC|MMC_RSP_OPCODE)
#define MMC_RSP_R1B (MMC_RSP_SHORT|MMC_RSP_CRC|MMC_RSP_OPCODE|MMC_RSP_BUSY)
#define MMC_RSP_R2 (MMC_RSP_LONG|MMC_RSP_CRC)
#define MMC_RSP_R3 (MMC_RSP_SHORT)
#define MMC_RSP_R6 (MMC_RSP_SHORT|MMC_RSP_CRC)