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mmc: Fix block length for DDR mode

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Block length for write and read commands is fixed to 512 bytes
when the card is in Dual Data Rate mode. If block length read from CSD
is different, make sure the driver will use correct length
in all further calculations and settings.

Signed-off-by: Andrew Gabbasov <andrew_gabbasov@mentor.com>
This commit is contained in:
Andrew Gabbasov 2014-12-01 06:59:11 -06:00 committed by Pantelis Antoniou
parent 201d5ac438
commit 5af8f45cd0
1 changed files with 6 additions and 0 deletions
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6
drivers/mmc/mmc.c
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@ -1188,6 +1188,12 @@ static int mmc_startup(struct mmc *mmc)
mmc_set_clock(mmc, mmc->tran_speed);
/* Fix the block length for DDR mode */
if (mmc->ddr_mode) {
mmc->read_bl_len = MMC_MAX_BLOCK_LEN;
mmc->write_bl_len = MMC_MAX_BLOCK_LEN;
}
/* fill in device description */
mmc->block_dev.lun = 0;
mmc->block_dev.type = 0;