[U-Boot] [PATCH 3/4] mmc: Fix block length for DDR mode

[Andrew Gabbasov]

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 at mentor.com>
---
 drivers/mmc/mmc.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/mmc/mmc.c b/drivers/mmc/mmc.c
index d878c1e..9918597 100644
--- a/drivers/mmc/mmc.c
+++ b/drivers/mmc/mmc.c
@@ -1170,6 +1170,12 @@ 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;
-- 
2.1.0