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Diffstat (limited to 'drivers/mmc')
-rw-r--r--drivers/mmc/mmc.c16
1 files changed, 13 insertions, 3 deletions
diff --git a/drivers/mmc/mmc.c b/drivers/mmc/mmc.c
index dd6a6ef..08187d5 100644
--- a/drivers/mmc/mmc.c
+++ b/drivers/mmc/mmc.c
@@ -158,6 +158,9 @@ int mmc_set_blocklen(struct mmc *mmc, int len)
{
struct mmc_cmd cmd;
+ if (mmc->card_caps & MMC_MODE_DDR_52MHz)
+ return 0;
+
cmd.cmdidx = MMC_CMD_SET_BLOCKLEN;
cmd.resp_type = MMC_RSP_R1;
cmd.cmdarg = len;
@@ -514,10 +517,13 @@ static int mmc_change_freq(struct mmc *mmc)
return 0;
/* High Speed is set, there are two types: 52MHz and 26MHz */
- if (cardtype & EXT_CSD_CARD_TYPE_52)
+ if (cardtype & EXT_CSD_CARD_TYPE_52) {
+ if (cardtype & EXT_CSD_CARD_TYPE_DDR_52)
+ mmc->card_caps |= MMC_MODE_DDR_52MHz;
mmc->card_caps |= MMC_MODE_HS_52MHz | MMC_MODE_HS;
- else
+ } else {
mmc->card_caps |= MMC_MODE_HS;
+ }
return 0;
}
@@ -1054,6 +1060,8 @@ static int mmc_startup(struct mmc *mmc)
/* An array of possible bus widths in order of preference */
static unsigned ext_csd_bits[] = {
+ EXT_CSD_DDR_BUS_WIDTH_8,
+ EXT_CSD_DDR_BUS_WIDTH_4,
EXT_CSD_BUS_WIDTH_8,
EXT_CSD_BUS_WIDTH_4,
EXT_CSD_BUS_WIDTH_1,
@@ -1061,13 +1069,15 @@ static int mmc_startup(struct mmc *mmc)
/* An array to map CSD bus widths to host cap bits */
static unsigned ext_to_hostcaps[] = {
+ [EXT_CSD_DDR_BUS_WIDTH_4] = MMC_MODE_DDR_52MHz,
+ [EXT_CSD_DDR_BUS_WIDTH_8] = MMC_MODE_DDR_52MHz,
[EXT_CSD_BUS_WIDTH_4] = MMC_MODE_4BIT,
[EXT_CSD_BUS_WIDTH_8] = MMC_MODE_8BIT,
};
/* An array to map chosen bus width to an integer */
static unsigned widths[] = {
- 8, 4, 1,
+ 8, 4, 8, 4, 1,
};
for (idx=0; idx < ARRAY_SIZE(ext_csd_bits); idx++) {