mmc: at91_mci: fix multiblock SDIO transfers
The AT91 MCI has special SDIO transfer types: SDIO block and SDIO byte
transfers, but at91_mci driver doesn't use them and handles all SDIO
transfers as ordinary MMC block transfers. This causes problems for
multiple-block SDIO transfers (in particular for 256-bytes blocks).
Fix this situation by checking the opcode for SDIO CMD53 and setting
the transfer type in the AT91_MCI_CMDR register properly.
This patch was tested with libertas SDIO driver: problem with TX
timeouts on big packets was eliminated.
Signed-off-by: Yauhen Kharuzhy <yauhen.kharuzhy@promwad.com>
Cc: <stable@kernel.org>
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Acked-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
diff --git a/drivers/mmc/host/at91_mci.c b/drivers/mmc/host/at91_mci.c
index 591ab54..d3e6a96 100644
--- a/drivers/mmc/host/at91_mci.c
+++ b/drivers/mmc/host/at91_mci.c
@@ -69,6 +69,7 @@
#include <linux/highmem.h>
#include <linux/mmc/host.h>
+#include <linux/mmc/sdio.h>
#include <asm/io.h>
#include <asm/irq.h>
@@ -493,10 +494,14 @@
else if (data->flags & MMC_DATA_WRITE)
cmdr |= AT91_MCI_TRCMD_START;
- if (data->flags & MMC_DATA_STREAM)
- cmdr |= AT91_MCI_TRTYP_STREAM;
- if (data->blocks > 1)
- cmdr |= AT91_MCI_TRTYP_MULTIPLE;
+ if (cmd->opcode == SD_IO_RW_EXTENDED) {
+ cmdr |= AT91_MCI_TRTYP_SDIO_BLOCK;
+ } else {
+ if (data->flags & MMC_DATA_STREAM)
+ cmdr |= AT91_MCI_TRTYP_STREAM;
+ if (data->blocks > 1)
+ cmdr |= AT91_MCI_TRTYP_MULTIPLE;
+ }
}
else {
block_length = 0;