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>
diff --git a/drivers/mmc/mmc.c b/drivers/mmc/mmc.c
index 98e5af3..c1c2862 100644
--- a/drivers/mmc/mmc.c
+++ b/drivers/mmc/mmc.c
@@ -333,6 +333,7 @@
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 @@
break;
blk += blk_r;
+
+ /* Waiting for the ready status */
+ if (mmc_send_status(mmc, timeout))
+ return 0;
}
return blk;