diff options
| author | Andrew Gabbasov <andrew_gabbasov@mentor.com> | 2014-04-03 04:34:32 -0500 |
|---|---|---|
| committer | Pantelis Antoniou <panto@antoniou-consulting.com> | 2014-05-23 11:34:33 +0300 |
| commit | 6b2221b008e0ea66de5befab38515e1a38c74d4f (patch) | |
| tree | d318147bba7167738a8b1293c91a9d5c665e09a9 | |
| parent | d803fea576c0b9caf2ece1ea1fac0550d3508a4d (diff) | |
mmc: Handle switch error status bit in MMC card status
MMC switch command for unsupported feature (e.g. bus width) sets a switch
error bit in card status. This bit should be checked, and, if it's set,
no access with new controller settings should be performed.
Acked-by: Pantelis Antoniou <panto@antoniou-consulting.com>
Signed-off-by: Andrew Gabbasov <andrew_gabbasov@mentor.com>
| -rw-r--r-- | drivers/mmc/mmc.c | 4 | ||||
| -rw-r--r-- | include/mmc.h | 2 |
2 files changed, 5 insertions, 1 deletions
diff --git a/drivers/mmc/mmc.c b/drivers/mmc/mmc.c index 0c9ae5d9cd..bb9014dc06 100644 --- a/drivers/mmc/mmc.c +++ b/drivers/mmc/mmc.c @@ -150,6 +150,8 @@ int mmc_send_status(struct mmc *mmc, int timeout) #endif return TIMEOUT; } + if (cmd.response[0] & MMC_STATUS_SWITCH_ERROR) + return SWITCH_ERR; return 0; } @@ -501,7 +503,7 @@ static int mmc_change_freq(struct mmc *mmc) err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_HS_TIMING, 1); if (err) - return err; + return err == SWITCH_ERR ? 0 : err; /* Now check to see that it worked */ err = mmc_send_ext_csd(mmc, ext_csd); diff --git a/include/mmc.h b/include/mmc.h index bc11f45a6f..9143efe668 100644 --- a/include/mmc.h +++ b/include/mmc.h @@ -54,6 +54,7 @@ #define COMM_ERR -18 /* Communications Error */ #define TIMEOUT -19 #define IN_PROGRESS -20 /* operation is in progress */ +#define SWITCH_ERR -21 /* Card reports failure to switch mode */ #define MMC_CMD_GO_IDLE_STATE 0 #define MMC_CMD_SEND_OP_COND 1 @@ -109,6 +110,7 @@ #define SECURE_ERASE 0x80000000 #define MMC_STATUS_MASK (~0x0206BF7F) +#define MMC_STATUS_SWITCH_ERROR (1 << 7) #define MMC_STATUS_RDY_FOR_DATA (1 << 8) #define MMC_STATUS_CURR_STATE (0xf << 9) #define MMC_STATUS_ERROR (1 << 19) |