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mmc: fix response timeout after switch command

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After issuing the switch command: Wait until 'current state' of the card
status becomes 'tran'. This prevents from response timeout at the next
command because of 'current state' = 'data'.

Signed-off-by: Stefan Bosch <stefan_b@posteo.net>
Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com>
This commit is contained in:
Stefan Bosch 2021-01-23 13:37:41 +01:00 committed by Peng Fan
parent 37e1362efc
commit 8e2b0af721
2 changed files with 3 additions and 1 deletions
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3
drivers/mmc/mmc.c
View File

@ -841,7 +841,8 @@ static int __mmc_switch(struct mmc *mmc, u8 set, u8 index, u8 value,
value);
return -EIO;
}
if (!ret && (status & MMC_STATUS_RDY_FOR_DATA))
if (!ret && (status & MMC_STATUS_RDY_FOR_DATA) &&
(status & MMC_STATUS_CURR_STATE) == MMC_STATE_TRANS)
return 0;
udelay(100);
} while (get_timer(start) < timeout_ms);

1
include/mmc.h
View File

@ -178,6 +178,7 @@ static inline bool mmc_is_tuning_cmd(uint cmdidx)
#define MMC_STATUS_ERROR (1 << 19)
#define MMC_STATE_PRG (7 << 9)
#define MMC_STATE_TRANS (4 << 9)
#define MMC_VDD_165_195 0x00000080 /* VDD voltage 1.65 - 1.95 */
#define MMC_VDD_20_21 0x00000100 /* VDD voltage 2.0 ~ 2.1 */