diff options
Diffstat (limited to 'drivers/mmc')
| -rw-r--r-- | drivers/mmc/card/block.c | 31 | ||||
| -rw-r--r-- | drivers/mmc/core/mmc.c | 52 |
2 files changed, 65 insertions, 18 deletions
diff --git a/drivers/mmc/card/block.c b/drivers/mmc/card/block.c index aa66d3f3abb..2cf1ba6db91 100644 --- a/drivers/mmc/card/block.c +++ b/drivers/mmc/card/block.c @@ -1473,26 +1473,29 @@ static int mmc_blk_alloc_part(struct mmc_card *card, return 0; } +/* MMC Physical partitions consist of two boot partitions and + * up to four general purpose partitions. + * For each partition enabled in EXT_CSD a block device will be allocatedi + * to provide access to the partition. + */ + static int mmc_blk_alloc_parts(struct mmc_card *card, struct mmc_blk_data *md) { - int ret = 0; + int idx, ret = 0; if (!mmc_card_mmc(card)) return 0; - if (card->ext_csd.boot_size && mmc_boot_partition_access(card->host)) { - ret = mmc_blk_alloc_part(card, md, EXT_CSD_PART_CONFIG_ACC_BOOT0, - card->ext_csd.boot_size >> 9, - true, - "boot0"); - if (ret) - return ret; - ret = mmc_blk_alloc_part(card, md, EXT_CSD_PART_CONFIG_ACC_BOOT1, - card->ext_csd.boot_size >> 9, - true, - "boot1"); - if (ret) - return ret; + for (idx = 0; idx < card->nr_parts; idx++) { + if (card->part[idx].size) { + ret = mmc_blk_alloc_part(card, md, + card->part[idx].part_cfg, + card->part[idx].size >> 9, + card->part[idx].force_ro, + card->part[idx].name); + if (ret) + return ret; + } } return ret; diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c index c632b1faf70..2a4c9a4d3c0 100644 --- a/drivers/mmc/core/mmc.c +++ b/drivers/mmc/core/mmc.c @@ -239,7 +239,9 @@ static int mmc_get_ext_csd(struct mmc_card *card, u8 **new_ext_csd) */ static int mmc_read_ext_csd(struct mmc_card *card, u8 *ext_csd) { - int err = 0; + int err = 0, idx; + unsigned int part_size; + u8 hc_erase_grp_sz = 0, hc_wp_grp_sz = 0; BUG_ON(!card); @@ -340,7 +342,14 @@ static int mmc_read_ext_csd(struct mmc_card *card, u8 *ext_csd) * There are two boot regions of equal size, defined in * multiples of 128K. */ - card->ext_csd.boot_size = ext_csd[EXT_CSD_BOOT_MULT] << 17; + if (ext_csd[EXT_CSD_BOOT_MULT] && mmc_boot_partition_access(card->host)) { + for (idx = 0; idx < MMC_NUM_BOOT_PARTITION; idx++) { + part_size = ext_csd[EXT_CSD_BOOT_MULT] << 17; + mmc_part_add(card, part_size, + EXT_CSD_PART_CONFIG_ACC_BOOT0 + idx, + "boot%d", idx, true); + } + } } card->ext_csd.raw_hc_erase_gap_size = @@ -362,9 +371,9 @@ static int mmc_read_ext_csd(struct mmc_card *card, u8 *ext_csd) card->ext_csd.raw_partition_support = ext_csd[EXT_CSD_PARTITION_SUPPORT]; if ((ext_csd[EXT_CSD_PARTITION_SUPPORT] & 0x2) && (ext_csd[EXT_CSD_PARTITION_ATTRIBUTE] & 0x1)) { - u8 hc_erase_grp_sz = + hc_erase_grp_sz = ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE]; - u8 hc_wp_grp_sz = + hc_wp_grp_sz = ext_csd[EXT_CSD_HC_WP_GRP_SIZE]; card->ext_csd.enhanced_area_en = 1; @@ -393,6 +402,41 @@ static int mmc_read_ext_csd(struct mmc_card *card, u8 *ext_csd) card->ext_csd.enhanced_area_offset = -EINVAL; card->ext_csd.enhanced_area_size = -EINVAL; } + + /* + * General purpose partition feature support -- + * If ext_csd has the size of general purpose partitions, + * set size, part_cfg, partition name in mmc_part. + */ + if (ext_csd[EXT_CSD_PARTITION_SUPPORT] & + EXT_CSD_PART_SUPPORT_PART_EN) { + if (card->ext_csd.enhanced_area_en != 1) { + hc_erase_grp_sz = + ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE]; + hc_wp_grp_sz = + ext_csd[EXT_CSD_HC_WP_GRP_SIZE]; + + card->ext_csd.enhanced_area_en = 1; + } + + for (idx = 0; idx < MMC_NUM_GP_PARTITION; idx++) { + if (!ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3] && + !ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 1] && + !ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 2]) + continue; + part_size = + (ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 2] + << 16) + + (ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 1] + << 8) + + ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3]; + part_size *= (size_t)(hc_erase_grp_sz * + hc_wp_grp_sz); + mmc_part_add(card, part_size << 19, + EXT_CSD_PART_CONFIG_ACC_GP0 + idx, + "gp%d", idx, false); + } + } card->ext_csd.sec_trim_mult = ext_csd[EXT_CSD_SEC_TRIM_MULT]; card->ext_csd.sec_erase_mult = |