diff options
| author | Yauhen Kharuzhy <yauhen.kharuzhy@promwad.com> | 2010-11-25 12:11:51 +0200 |
|---|---|---|
| committer | Chris Ball <cjb@laptop.org> | 2010-12-21 11:46:32 -0800 |
| commit | a2255ff45143001fecbc5e5a4b58fcb999d393ae (patch) | |
| tree | 6f524cb891b60e8c2ce40beba94b6dbb71c9f8bf /drivers/mmc | |
| parent | 0a59228168d3722b71f8e3dbc623316fb4be78f4 (diff) | |
| download | linux-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 'drivers/mmc')
| -rw-r--r-- | drivers/mmc/host/at91_mci.c | 13 |
1 files changed, 9 insertions, 4 deletions
diff --git a/drivers/mmc/host/at91_mci.c b/drivers/mmc/host/at91_mci.c index 591ab540b407..d3e6a962f423 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 @@ static void at91_mci_send_command(struct at91mci_host *host, struct mmc_command 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; |