diff options
| author | Jarkko Lavinen <jarkko.lavinen@nokia.com> | 2008-11-17 14:35:21 +0200 |
|---|---|---|
| committer | Pierre Ossman <drzeus@drzeus.cx> | 2008-12-31 18:18:12 +0100 |
| commit | b30f8af3358b5c66be223e3a9f3d11b3d02b4a8f (patch) | |
| tree | 937cf3024bdb48da748c8fece5cfaa6f6ef45744 /drivers/mmc | |
| parent | 35ff8554d12ecc80a46ea0d9bce34fe28733ff38 (diff) | |
mmc: Add 8-bit bus width support
Signed-off-by: Jarkko Lavinen <jarkko.lavinen@nokia.com>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
Diffstat (limited to 'drivers/mmc')
| -rw-r--r-- | drivers/mmc/core/mmc.c | 18 |
1 files changed, 14 insertions, 4 deletions
diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c index fdd7c760be8c..c232d11a7ed4 100644 --- a/drivers/mmc/core/mmc.c +++ b/drivers/mmc/core/mmc.c @@ -434,13 +434,24 @@ static int mmc_init_card(struct mmc_host *host, u32 ocr, * Activate wide bus (if supported). */ if ((card->csd.mmca_vsn >= CSD_SPEC_VER_4) && - (host->caps & MMC_CAP_4_BIT_DATA)) { + (host->caps & (MMC_CAP_4_BIT_DATA | MMC_CAP_8_BIT_DATA))) { + unsigned ext_csd_bit, bus_width; + + if (host->caps & MMC_CAP_8_BIT_DATA) { + ext_csd_bit = EXT_CSD_BUS_WIDTH_8; + bus_width = MMC_BUS_WIDTH_8; + } else { + ext_csd_bit = EXT_CSD_BUS_WIDTH_4; + bus_width = MMC_BUS_WIDTH_4; + } + err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, - EXT_CSD_BUS_WIDTH, EXT_CSD_BUS_WIDTH_4); + EXT_CSD_BUS_WIDTH, ext_csd_bit); + if (err) goto free_card; - mmc_set_bus_width(card->host, MMC_BUS_WIDTH_4); + mmc_set_bus_width(card->host, bus_width); } if (!oldcard) @@ -624,4 +635,3 @@ err: return err; } - |