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>

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>
Andrew Gabbasov · Pantelis Antoniou
1 parent 201d5ac438
Showing 1 changed file with 6 additions and 0 deletions Side-by-side Diff
drivers/mmc/mmc.c
@@ -1188,6 +1188,12 @@
  
 	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;
...	...	@@ -1188,6 +1188,12 @@
1188	1188
1189	1189	mmc_set_clock(mmc, mmc->tran_speed);
1190	1190
	1191	+ /* Fix the block length for DDR mode */
	1192	+ if (mmc->ddr_mode) {
	1193	+ mmc->read_bl_len = MMC_MAX_BLOCK_LEN;
	1194	+ mmc->write_bl_len = MMC_MAX_BLOCK_LEN;
	1195	+ }
	1196	+
1191	1197	/* fill in device description */
1192	1198	mmc->block_dev.lun = 0;
1193	1199	mmc->block_dev.type = 0;