From: Andrew Gabbasov <andrew_gabbasov@mentor.com>
Date: Mon, 1 Dec 2014 12:59:11 +0000 (-0600)
Subject: mmc: Fix block length for DDR mode
X-Git-Tag: v2015.01-rc4~26^2~1
X-Git-Url: https://git.librecmc.org/?a=commitdiff_plain;h=5af8f45cd049cf01790a17ff68e61303bc08abc3;p=oweals%2Fu-boot.git

mmc: Fix block length for DDR mode

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>
---

diff --git a/drivers/mmc/mmc.c b/drivers/mmc/mmc.c
index 65d8b3a87a..1eb9c27339 100644
--- a/drivers/mmc/mmc.c
+++ b/drivers/mmc/mmc.c
@@ -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;