diff options
| author |   Philip Rakity <prakity@marvell.com> | 2012-01-26 06:57:10 -0800 |
|---|---|---|
| committer |   Chris Ball <cjb@laptop.org> | 2012-02-13 20:38:28 -0500 |
| commit | 2d0d68f583279dbdcc1a2ef3f81ea8d285a0adbe (patch) | |
| tree | d99691e952df66e43250670df70372e308ffebed /drivers/mmc | |
| parent | mmc: esdhc: fix errors when booting kernel on Freescale eSDHC version 2.3 (diff) | |
| download | linux-dev-2d0d68f583279dbdcc1a2ef3f81ea8d285a0adbe.tar.xz linux-dev-2d0d68f583279dbdcc1a2ef3f81ea8d285a0adbe.zip | |
mmc: core: UHS sdio card that fails should not exceed 50MHz
A UHS sdio card that fails initialization at 1.8v signaling is not in
UHS mode. We cannot use the speed in the the cis to reflect the bus
speed as this is the maxiumum value and will not reflect the fact
that the host is operating at a lower (non uhs) bus speed.
Signed-off-by: Philip Rakity <prakity@marvell.com>
Signed-off-by: Bing Zhao <bzhao@marvell.com>
Reviewed-by: Aaron Lu <aaron.lu@amd.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
Diffstat (limited to 'drivers/mmc')
| -rw-r--r-- | drivers/mmc/core/sdio.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/drivers/mmc/core/sdio.c b/drivers/mmc/core/sdio.c index bd7bacc950dc..12cde6ee17f5 100644 --- a/drivers/mmc/core/sdio.c +++ b/drivers/mmc/core/sdio.c @@ -98,10 +98,11 @@ fail: return ret; } -static int sdio_read_cccr(struct mmc_card *card) +static int sdio_read_cccr(struct mmc_card *card, u32 ocr) { int ret; int cccr_vsn; + int uhs = ocr & R4_18V_PRESENT; unsigned char data; unsigned char speed; @@ -149,7 +150,7 @@ static int sdio_read_cccr(struct mmc_card *card) card->scr.sda_spec3 = 0; card->sw_caps.sd3_bus_mode = 0; card->sw_caps.sd3_drv_type = 0; - if (cccr_vsn >= SDIO_CCCR_REV_3_00) { + if (cccr_vsn >= SDIO_CCCR_REV_3_00 && uhs) { card->scr.sda_spec3 = 1; ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_UHS, 0, &data); @@ -712,7 +713,7 @@ static int mmc_sdio_init_card(struct mmc_host *host, u32 ocr, /* * Read the common registers. */ - err = sdio_read_cccr(card); + err = sdio_read_cccr(card, ocr); if (err) goto remove; |