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SD/MMC: check the card status during erase operation 

Use the function 'mmc_send_status' to check the card status.
only when the card is ready, driver can send the next erase command
to the card, otherwise, the erase will failed:
=> mmc erase 0 1
MMC erase: dev # 0, block # 0, count 1 ... 1 blocks erase: OK
=> mmc erase 0 2
MMC erase: dev # 0, block # 0, count 2 ... mmc erase failed
1 blocks erase: ERROR
=> mmc erase 0 4
MMC erase: dev # 0, block # 0, count 4 ... mmc erase failed
1 blocks erase: ERROR

Signed-off-by: Jerry Huang <Chang-Ming.Huang@freescale.com>
CC: Andy Fleming <afleming@gmail.com>
CC: Marek Vasut <marex@denx.de>
Signed-off-by: Andy Fleming <afleming@freescale.com>
This commit is contained in:
Jerry Huang 2012-05-17 23:00:51 +00:00 committed by Andy Fleming
parent 40242bc394
commit d2d8afae33
1 changed files with 5 additions and 0 deletions
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5
drivers/mmc/mmc.c
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@ -333,6 +333,7 @@ mmc_berase(int dev_num, unsigned long start, lbaint_t blkcnt)
int err = 0;
struct mmc *mmc = find_mmc_device(dev_num);
lbaint_t blk = 0, blk_r = 0;
int timeout = 1000;
if (!mmc)
return -1;
@ -352,6 +353,10 @@ mmc_berase(int dev_num, unsigned long start, lbaint_t blkcnt)
break;
blk += blk_r;
/* Waiting for the ready status */
if (mmc_send_status(mmc, timeout))
return 0;
}
return blk;