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authorYauhen Kharuzhy <yauhen.kharuzhy@promwad.com>2010-11-25 12:11:51 +0200
committerChris Ball <cjb@laptop.org>2010-12-21 11:46:32 -0800
commita2255ff45143001fecbc5e5a4b58fcb999d393ae (patch)
tree6f524cb891b60e8c2ce40beba94b6dbb71c9f8bf /arch/arm/mach-at91
parent0a59228168d3722b71f8e3dbc623316fb4be78f4 (diff)
downloadop-kernel-dev-a2255ff45143001fecbc5e5a4b58fcb999d393ae.zip
op-kernel-dev-a2255ff45143001fecbc5e5a4b58fcb999d393ae.tar.gz
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>
Diffstat (limited to 'arch/arm/mach-at91')
-rw-r--r--arch/arm/mach-at91/include/mach/at91_mci.h2
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 57f8ee1..27ac6f5 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 */
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