[PATCH] mmc: sh_mmcif: Support MMC_SLEEP_AWAKE command

Laurent Pinchart
2012-06-12T20:56:05Z

The MMC_SLEEP_AWAKE and SD_IO_SEND_OP_COND commands share the same
opcode. SD_IO_SEND_OP_COND isn't supported by the SH MMCIF, but
MMC_SLEEP_AWAKE is. Discriminate between the two commands using the
command flags, and reject SD_IO_SEND_OP_COND only.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
---
drivers/mmc/host/sh_mmcif.c | 14 ++++----------
1 files changed, 4 insertions(+), 10 deletions(-)

Not supporting the MMC_SLEEP_AWAKE command makes system suspend fail if an MMC
or eMMC device supporting sleep/wake is connected. The issue has been first
noticed on the Armadillo 800 EVA board.

diff --git a/drivers/mmc/host/sh_mmcif.c b/drivers/mmc/host/sh_mmcif.c
index 724b35e..e32da11 100644
--- a/drivers/mmc/host/sh_mmcif.c
+++ b/drivers/mmc/host/sh_mmcif.c
@@ -892,21 +892,15 @@ static void sh_mmcif_request(struct mmc_host *mmc, struct mmc_request *mrq)

switch (mrq->cmd->opcode) {
/* MMCIF does not support SD/SDIO command */
- case SD_IO_SEND_OP_COND:
+ case MMC_SLEEP_AWAKE: /* = SD_IO_SEND_OP_COND (5) */
+ case MMC_SEND_EXT_CSD: /* = SD_SEND_IF_COND (8) */
+ if ((mrq->cmd->flags & MMC_CMD_MASK) != MMC_CMD_BCR)
+ break;
case MMC_APP_CMD:
host->state = STATE_IDLE;
mrq->cmd->error = -ETIMEDOUT;
mmc_request_done(mmc, mrq);
return;
- case MMC_SEND_EXT_CSD: /* = SD_SEND_IF_COND (8) */
- if (!mrq->data) {
- /* send_if_cond cmd (not support) */
- host->state = STATE_IDLE;
- mrq->cmd->error = -ETIMEDOUT;
- mmc_request_done(mmc, mrq);
- return;
- }
- break;
default:
break;
}
--
Regards,

Laurent Pinchart