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| author | Hanumath Prasad <hanumath.prasad@stericsson.com> | 2010-09-30 17:37:23 -0400 |
|---|---|---|
| committer | Chris Ball <cjb@laptop.org> | 2010-10-23 21:11:16 +0800 |
| commit | dfc13e8402c75e7c2e0a52e123c0500a3259866b (patch) | |
| tree | 29a0f5daeb300da027bb0ed9c042fffd214b078f /drivers/mmc/card | |
| parent | 99fc5131018cbdc3cf42ce09fb394a4e8b053c74 (diff) | |
| download | linux-dfc13e8402c75e7c2e0a52e123c0500a3259866b.tar.gz linux-dfc13e8402c75e7c2e0a52e123c0500a3259866b.tar.bz2 linux-dfc13e8402c75e7c2e0a52e123c0500a3259866b.zip | |
mmc: MMC 4.4 DDR support
Add support for Dual Data Rate MMC cards as defined in the 4.4
specification.
Signed-off-by: Hanumath Prasad <hanumath.prasad@stericsson.com>
Cc: linux-mmc@vger.kernel.org
Acked-by: Linus Walleij <linus.walleij@stericsson.com>
Tested-by Zhangfei Gao <zhangfei.gao@marvell.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
Diffstat (limited to 'drivers/mmc/card')
| -rw-r--r-- | drivers/mmc/card/block.c | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/drivers/mmc/card/block.c b/drivers/mmc/card/block.c index 759a105cb216..aab593480975 100644 --- a/drivers/mmc/card/block.c +++ b/drivers/mmc/card/block.c @@ -373,7 +373,8 @@ static int mmc_blk_issue_rw_rq(struct mmc_queue *mq, struct request *req) readcmd = MMC_READ_SINGLE_BLOCK; writecmd = MMC_WRITE_BLOCK; } - + if (mmc_card_ddr_mode(card)) + brq.data.flags |= MMC_DDR_MODE; if (rq_data_dir(req) == READ) { brq.cmd.opcode = readcmd; brq.data.flags |= MMC_DATA_READ; @@ -655,8 +656,11 @@ mmc_blk_set_blksize(struct mmc_blk_data *md, struct mmc_card *card) struct mmc_command cmd; int err; - /* Block-addressed cards ignore MMC_SET_BLOCKLEN. */ - if (mmc_card_blockaddr(card)) + /* + * Block-addressed and ddr mode supported cards + * ignore MMC_SET_BLOCKLEN. + */ + if (mmc_card_blockaddr(card) || mmc_card_ddr_mode(card)) return 0; mmc_claim_host(card->host); |