diff options
| author | Namjae Jeon <linkinjeon@gmail.com> | 2011-10-06 23:41:38 +0900 |
|---|---|---|
| committer | Chris Ball <cjb@laptop.org> | 2011-10-26 16:32:17 -0400 |
| commit | e0c368d571d946ff40f068344b5c2df90c93dd2e (patch) | |
| tree | 509fdad0059dac018128610723557b4ca12f29d2 /drivers/mmc/card | |
| parent | 5238acbe36dd5100fb6b035a995ae5fc89dd0708 (diff) | |
mmc: core: general purpose MMC partition support.
It allows gerneral purpose partitions in MMC Device. And I try to simply
make mmc_blk_alloc_parts using mmc_part structure suggested by Andrei
Warkentin. After patching, we see general purpose partitions like this:
> cat /proc/partitions
179 0 847872 mmcblk0
179 192 4096 mmcblk0gp3
179 160 4096 mmcblk0gp2
179 128 4096 mmcblk0gp1
179 96 1052672 mmcblk0gp0
179 64 1024 mmcblk0boot1
179 32 1024 mmcblk0boot0
Signed-off-by: Namjae Jeon <linkinjeon@gmail.com>
Acked-by: Andrei Warkentin <awarkentin@vmware.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
Diffstat (limited to 'drivers/mmc/card')
| -rw-r--r-- | drivers/mmc/card/block.c | 31 |
1 files changed, 17 insertions, 14 deletions
diff --git a/drivers/mmc/card/block.c b/drivers/mmc/card/block.c index aa66d3f3abb1..2cf1ba6db910 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; |