diff options
author | Grégory Soutadé <gsoutade@neotion.com> | 2014-09-15 17:47:06 +0200 |
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committer | Ulf Hansson <ulf.hansson@linaro.org> | 2014-09-19 00:03:36 +0200 |
commit | b4493eea4a6561bd9fa57aaa2f7d2b5ea31a1f2e (patch) | |
tree | d43c88590a9e930a356c17dbcea3450541b50717 /drivers/mmc | |
parent | 87d2163dae1f2388c7ccda5269be8d58e24382dd (diff) | |
download | linux-b4493eea4a6561bd9fa57aaa2f7d2b5ea31a1f2e.tar.gz |
mmc: Move code that manages user area and gp partitions into functions
Move code that manages user area and general purpose
partitions into functions.
Signed-off-by: Grégory Soutadé <gsoutade@neotion.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'drivers/mmc')
-rw-r--r-- | drivers/mmc/core/mmc.c | 162 |
1 files changed, 89 insertions, 73 deletions
diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c index 69e6273ed228..5b4b969c18bf 100644 --- a/drivers/mmc/core/mmc.c +++ b/drivers/mmc/core/mmc.c @@ -299,6 +299,93 @@ static void mmc_select_card_type(struct mmc_card *card) card->mmc_avail_type = avail_type; } +static void mmc_manage_enhanced_area(struct mmc_card *card, u8 *ext_csd) +{ + u8 hc_erase_grp_sz = 0, hc_wp_grp_sz = 0; + + /* + * Enhanced area feature support -- check whether the eMMC + * card has the Enhanced area enabled. If so, export enhanced + * area offset and size to user by adding sysfs interface. + */ + if ((ext_csd[EXT_CSD_PARTITION_SUPPORT] & 0x2) && + (ext_csd[EXT_CSD_PARTITION_ATTRIBUTE] & 0x1)) { + 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; + /* + * calculate the enhanced data area offset, in bytes + */ + card->ext_csd.enhanced_area_offset = + (ext_csd[139] << 24) + (ext_csd[138] << 16) + + (ext_csd[137] << 8) + ext_csd[136]; + if (mmc_card_blockaddr(card)) + card->ext_csd.enhanced_area_offset <<= 9; + /* + * calculate the enhanced data area size, in kilobytes + */ + card->ext_csd.enhanced_area_size = + (ext_csd[142] << 16) + (ext_csd[141] << 8) + + ext_csd[140]; + card->ext_csd.enhanced_area_size *= + (size_t)(hc_erase_grp_sz * hc_wp_grp_sz); + card->ext_csd.enhanced_area_size <<= 9; + } else { + /* + * If the enhanced area is not enabled, disable these + * device attributes. + */ + card->ext_csd.enhanced_area_offset = -EINVAL; + card->ext_csd.enhanced_area_size = -EINVAL; + } +} + +static void mmc_manage_gp_partitions(struct mmc_card *card, u8 *ext_csd) +{ + unsigned int part_size; + u8 hc_erase_grp_sz = 0, hc_wp_grp_sz = 0; + int idx; + + /* + * 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, + MMC_BLK_DATA_AREA_GP); + } + } +} + /* * Decode extended CSD. */ @@ -306,7 +393,6 @@ static int mmc_read_ext_csd(struct mmc_card *card, u8 *ext_csd) { int err = 0, idx; unsigned int part_size; - u8 hc_erase_grp_sz = 0, hc_wp_grp_sz = 0; BUG_ON(!card); @@ -403,80 +489,10 @@ static int mmc_read_ext_csd(struct mmc_card *card, u8 *ext_csd) ext_csd[EXT_CSD_TRIM_MULT]; card->ext_csd.raw_partition_support = ext_csd[EXT_CSD_PARTITION_SUPPORT]; if (card->ext_csd.rev >= 4) { - /* - * Enhanced area feature support -- check whether the eMMC - * card has the Enhanced area enabled. If so, export enhanced - * area offset and size to user by adding sysfs interface. - */ - if ((ext_csd[EXT_CSD_PARTITION_SUPPORT] & 0x2) && - (ext_csd[EXT_CSD_PARTITION_ATTRIBUTE] & 0x1)) { - hc_erase_grp_sz = - ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE]; - hc_wp_grp_sz = - ext_csd[EXT_CSD_HC_WP_GRP_SIZE]; + mmc_manage_enhanced_area(card, ext_csd); - card->ext_csd.enhanced_area_en = 1; - /* - * calculate the enhanced data area offset, in bytes - */ - card->ext_csd.enhanced_area_offset = - (ext_csd[139] << 24) + (ext_csd[138] << 16) + - (ext_csd[137] << 8) + ext_csd[136]; - if (mmc_card_blockaddr(card)) - card->ext_csd.enhanced_area_offset <<= 9; - /* - * calculate the enhanced data area size, in kilobytes - */ - card->ext_csd.enhanced_area_size = - (ext_csd[142] << 16) + (ext_csd[141] << 8) + - ext_csd[140]; - card->ext_csd.enhanced_area_size *= - (size_t)(hc_erase_grp_sz * hc_wp_grp_sz); - card->ext_csd.enhanced_area_size <<= 9; - } else { - /* - * If the enhanced area is not enabled, disable these - * device attributes. - */ - card->ext_csd.enhanced_area_offset = -EINVAL; - card->ext_csd.enhanced_area_size = -EINVAL; - } + mmc_manage_gp_partitions(card, ext_csd); - /* - * 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, - MMC_BLK_DATA_AREA_GP); - } - } card->ext_csd.sec_trim_mult = ext_csd[EXT_CSD_SEC_TRIM_MULT]; card->ext_csd.sec_erase_mult = |