diff options
| author | Grégory Soutadé <gsoutade@neotion.com> | 2014-09-15 17:47:11 +0200 |
|---|---|---|
| committer | Ulf Hansson <ulf.hansson@linaro.org> | 2014-09-19 00:03:36 +0200 |
| commit | 994324bbabc7e9dce75322bbf839b846aca8e1d6 (patch) | |
| tree | bfaa55ece5bc628076112ffcec6eb4b8f0ba0568 /drivers/mmc | |
| parent | 69803d4f487fc60ce740f1fe1f0d2092d97277b6 (diff) | |
| download | linux-994324bbabc7e9dce75322bbf839b846aca8e1d6.tar.bz2 | |
mmc: Checks EXT_CSD_PARTITION_SETTING_COMPLETED before partitions computation
Checks EXT_CSD_PARTITION_SETTING_COMPLETED bit before
computing enhanced user area offset and size, and
adding mmc general purpose partitions. The two needs
EXT_CSD_PARTITION_SETTING_COMPLETED bit be set to be
valid (as described in JEDEC standard).
Warn user in case of misconfiguration.
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 | 81 |
1 files changed, 44 insertions, 37 deletions
diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c index eb78fcd01e52..ce11d89aa305 100644 --- a/drivers/mmc/core/mmc.c +++ b/drivers/mmc/core/mmc.c @@ -301,7 +301,13 @@ static void mmc_select_card_type(struct mmc_card *card) static void mmc_manage_enhanced_area(struct mmc_card *card, u8 *ext_csd) { - u8 hc_erase_grp_sz = 0, hc_wp_grp_sz = 0; + u8 hc_erase_grp_sz, hc_wp_grp_sz; + + /* + * Disable these attributes by default + */ + card->ext_csd.enhanced_area_offset = -EINVAL; + card->ext_csd.enhanced_area_size = -EINVAL; /* * Enhanced area feature support -- check whether the eMMC @@ -310,43 +316,41 @@ static void mmc_manage_enhanced_area(struct mmc_card *card, u8 *ext_csd) */ 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]; + if (card->ext_csd.partition_setting_completed) { + hc_erase_grp_sz = + ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE]; + hc_wp_grp_sz = + ext_csd[EXT_CSD_HC_WP_GRP_SIZE]; - /* - * 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; + /* + * 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 { + pr_warn("%s: defines enhanced area without partition setting complete\n", + mmc_hostname(card->host)); + } } } 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; + u8 hc_erase_grp_sz, hc_wp_grp_sz; + unsigned int part_size; /* * General purpose partition feature support -- @@ -355,18 +359,21 @@ static void mmc_manage_gp_partitions(struct mmc_card *card, u8 *ext_csd) */ if (ext_csd[EXT_CSD_PARTITION_SUPPORT] & EXT_CSD_PART_SUPPORT_PART_EN) { - if (card->ext_csd.partition_setting_completed) { - hc_erase_grp_sz = - ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE]; - hc_wp_grp_sz = - ext_csd[EXT_CSD_HC_WP_GRP_SIZE]; - } + hc_erase_grp_sz = + ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE]; + hc_wp_grp_sz = + ext_csd[EXT_CSD_HC_WP_GRP_SIZE]; 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; + if (card->ext_csd.partition_setting_completed == 0) { + pr_warn("%s: has partition size defined without partition complete\n", + mmc_hostname(card->host)); + break; + } part_size = (ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 2] << 16) + |