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authorAndrei Warkentin <andreiw@motorola.com>2011-05-23 15:06:38 -0500
committerChris Ball <cjb@laptop.org>2011-05-25 16:49:03 -0400
commitf0d89972b01798cf9d245dfa1cacfa0ee78a3593 (patch)
treea3e69fc95825971384798eac4281148db837f891 /drivers/mmc
parente89d456fcdde2df008c032bf928e69e628e07a28 (diff)
mmc: core: Block CMD23 support for UHS104/SDXC cards.
SD cards operating at UHS104 or better support SET_BLOCK_COUNT. Signed-off-by: Andrei Warkentin <andreiw@motorola.com> Reviewed-by: Arindam Nath <arindam.nath@amd.com> Signed-off-by: Chris Ball <cjb@laptop.org>
Diffstat (limited to 'drivers/mmc')
-rw-r--r--drivers/mmc/card/block.c9
-rw-r--r--drivers/mmc/core/sd.c2
2 files changed, 8 insertions, 3 deletions
diff --git a/drivers/mmc/card/block.c b/drivers/mmc/card/block.c
index a380accaba9a..71da5641e258 100644
--- a/drivers/mmc/card/block.c
+++ b/drivers/mmc/card/block.c
@@ -1057,9 +1057,12 @@ static struct mmc_blk_data *mmc_blk_alloc_req(struct mmc_card *card,
blk_queue_logical_block_size(md->queue.queue, 512);
set_capacity(md->disk, size);
- if (mmc_host_cmd23(card->host) &&
- mmc_card_mmc(card))
- md->flags |= MMC_BLK_CMD23;
+ if (mmc_host_cmd23(card->host)) {
+ if (mmc_card_mmc(card) ||
+ (mmc_card_sd(card) &&
+ card->scr.cmds & SD_SCR_CMD23_SUPPORT))
+ md->flags |= MMC_BLK_CMD23;
+ }
if (mmc_card_mmc(card) &&
md->flags & MMC_BLK_CMD23 &&
diff --git a/drivers/mmc/core/sd.c b/drivers/mmc/core/sd.c
index 596d0b9d30b8..ff2774128aa9 100644
--- a/drivers/mmc/core/sd.c
+++ b/drivers/mmc/core/sd.c
@@ -203,6 +203,8 @@ static int mmc_decode_scr(struct mmc_card *card)
else
card->erased_byte = 0x0;
+ if (scr->sda_spec3)
+ scr->cmds = UNSTUFF_BITS(resp, 32, 2);
return 0;
}