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>

1 files changed, 2 insertions, 0 deletions

diff --git a/arch/arm/mach-at91/include/mach/at91_mci.h b/arch/arm/mach-at91/include/mach/at91_mci.h
index 57f8ee154943..27ac6f550fe3 100644
--- a/arch/arm/mach-at91/include/mach/at91_mci.h
+++ b/arch/arm/mach-at91/include/mach/at91_mci.h
@@ -74,6 +74,8 @@
 #define                 AT91_MCI_TRTYP_BLOCK    (0 << 19)
 #define                 AT91_MCI_TRTYP_MULTIPLE (1 << 19)
 #define                 AT91_MCI_TRTYP_STREAM   (2 << 19)
+#define                 AT91_MCI_TRTYP_SDIO_BYTE        (4 << 19)
+#define                 AT91_MCI_TRTYP_SDIO_BLOCK       (5 << 19)
 
 #define AT91_MCI_BLKR           0x18            /* Block Register */
 #define         AT91_MCI_BLKR_BCNT(n)   ((0xffff & (n)) << 0)   /* Block count */