diff options
| author | Markus Niebel <Markus.Niebel@tq-group.com> | 2014-11-18 15:11:42 +0100 |
|---|---|---|
| committer | Pantelis Antoniou <pantelis.antoniou@konsulko.com> | 2014-12-12 20:28:04 +0200 |
| commit | d7b2912991bb18db26b6c6b51cdc637142e21d3e (patch) | |
| tree | 59d7c0dfd3fda275beed537fee4014ef02fc532d /drivers | |
| parent | e75eaf100bdf01b94757e2b40365b46a7d380275 (diff) | |
MMC: fix user capacity for partitioned eMMC card
if the card claims to be high capacity and the card
is partitioned the capacity shall still be read from
ext_csd SEC_COUNT even if the resulting capacity is
smaller than 2 GiB
Signed-off-by: Markus Niebel <Markus.Niebel@tq-group.com>
Acked-by: Jaehoon Chung <jh80.chung@samsung.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/mmc/mmc.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/mmc/mmc.c b/drivers/mmc/mmc.c index 9dc924c412..4a8cf65f79 100644 --- a/drivers/mmc/mmc.c +++ b/drivers/mmc/mmc.c @@ -1022,6 +1022,21 @@ static int mmc_startup(struct mmc *mmc) mmc->erase_grp_size = ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE] * MMC_MAX_BLOCK_LEN * 1024; + /* + * if high capacity and partition setting completed + * SEC_COUNT is valid even if it is smaller than 2 GiB + * JEDEC Standard JESD84-B45, 6.2.4 + */ + if (mmc->high_capacity && + (ext_csd[EXT_CSD_PARTITION_SETTING] & + EXT_CSD_PARTITION_SETTING_COMPLETED)) { + capacity = (ext_csd[EXT_CSD_SEC_CNT]) | + (ext_csd[EXT_CSD_SEC_CNT + 1] << 8) | + (ext_csd[EXT_CSD_SEC_CNT + 2] << 16) | + (ext_csd[EXT_CSD_SEC_CNT + 3] << 24); + capacity *= MMC_MAX_BLOCK_LEN; + mmc->capacity_user = capacity; + } } else { /* Calculate the group size from the csd value. */ int erase_gsz, erase_gmul; |