diff options
| author | Jaehoon Chung <jh80.chung@samsung.com> | 2013-07-18 08:34:41 +0400 |
|---|---|---|
| committer | Chris Ball <cjb@laptop.org> | 2013-08-25 07:07:38 +0400 |
| commit | 77776fd0a4cc541b9a528eacc1d31ca47eb1ae7a (patch) | |
| tree | 77587901f32cd6fb25e5b1ec48ee5acc443ab0a5 /drivers/mmc/core | |
| parent | 7fca96758e977497c67a424006c60aaf2d3db212 (diff) | |
| download | linux-77776fd0a4cc541b9a528eacc1d31ca47eb1ae7a.tar.xz | |
mmc: sd: fix the maximum au_size for SD3.0
Since SD Physical Layer specification V3.0, AU_SIZE is supported up
to 0xf. So If SD-card is supported v3.0, then max_au should be 0xf.
Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
Diffstat (limited to 'drivers/mmc/core')
| -rw-r--r-- | drivers/mmc/core/sd.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/drivers/mmc/core/sd.c b/drivers/mmc/core/sd.c index 1240a85a9aa2..5e8823dc3ef6 100644 --- a/drivers/mmc/core/sd.c +++ b/drivers/mmc/core/sd.c @@ -215,7 +215,7 @@ static int mmc_decode_scr(struct mmc_card *card) static int mmc_read_ssr(struct mmc_card *card) { unsigned int au, es, et, eo; - int err, i; + int err, i, max_au; u32 *ssr; if (!(card->csd.cmdclass & CCC_APP_SPEC)) { @@ -239,12 +239,15 @@ static int mmc_read_ssr(struct mmc_card *card) for (i = 0; i < 16; i++) ssr[i] = be32_to_cpu(ssr[i]); + /* SD3.0 increases max AU size to 64MB (0xF) from 4MB (0x9) */ + max_au = card->scr.sda_spec3 ? 0xF : 0x9; + /* * UNSTUFF_BITS only works with four u32s so we have to offset the * bitfield positions accordingly. */ au = UNSTUFF_BITS(ssr, 428 - 384, 4); - if (au > 0 && au <= 9) { + if (au > 0 && au <= max_au) { card->ssr.au = 1 << (au + 4); es = UNSTUFF_BITS(ssr, 408 - 384, 16); et = UNSTUFF_BITS(ssr, 402 - 384, 6); |