diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/mmc/mmc.c | 30 |
1 files changed, 29 insertions, 1 deletions
diff --git a/drivers/mmc/mmc.c b/drivers/mmc/mmc.c index cdf2713..1d089a7 100644 --- a/drivers/mmc/mmc.c +++ b/drivers/mmc/mmc.c @@ -577,6 +577,18 @@ int mmc_change_freq(struct mmc *mmc) return 0; } +int mmc_switch_part(int dev_num, unsigned int part_num) +{ + struct mmc *mmc = find_mmc_device(dev_num); + + if (!mmc) + return -1; + + return mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_PART_CONF, + (mmc->part_config & ~PART_ACCESS_MASK) + | (part_num & PART_ACCESS_MASK)); +} + int sd_switch(struct mmc *mmc, int mode, int group, u8 value, u8 *resp) { struct mmc_cmd cmd; @@ -899,6 +911,7 @@ int mmc_startup(struct mmc *mmc) return err; } + mmc->part_config = MMCPART_NOAVAILABLE; if (!IS_SD(mmc) && (mmc->version >= MMC_VERSION_4)) { /* check ext_csd version and capacity */ err = mmc_send_ext_csd(mmc, ext_csd); @@ -907,6 +920,10 @@ int mmc_startup(struct mmc *mmc) ext_csd[214] << 16 | ext_csd[215] << 24; mmc->capacity *= 512; } + + /* store the partition info of emmc */ + if (ext_csd[160] & PART_SUPPORT) + mmc->part_config = ext_csd[179]; } if (IS_SD(mmc)) @@ -1048,6 +1065,9 @@ int mmc_init(struct mmc *mmc) { int err; + if (mmc->has_init) + return 0; + err = mmc->init(mmc); if (err) @@ -1062,6 +1082,9 @@ int mmc_init(struct mmc *mmc) if (err) return err; + /* The internal partition reset to user partition(0) at every CMD0*/ + mmc->part_num = 0; + /* Test for SD version 2 */ err = mmc_send_if_cond(mmc); @@ -1078,7 +1101,12 @@ int mmc_init(struct mmc *mmc) } } - return mmc_startup(mmc); + err = mmc_startup(mmc); + if (err) + mmc->has_init = 0; + else + mmc->has_init = 1; + return err; } /* |