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authorGrégory Soutadé <gsoutade@neotion.com>2014-09-15 17:47:11 +0200
committerUlf Hansson <ulf.hansson@linaro.org>2014-09-19 00:03:36 +0200
commit994324bbabc7e9dce75322bbf839b846aca8e1d6 (patch)
treebfaa55ece5bc628076112ffcec6eb4b8f0ba0568 /drivers/mmc
parent69803d4f487fc60ce740f1fe1f0d2092d97277b6 (diff)
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.c81
1 files changed, 44 insertions, 37 deletions
diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c
index eb78fcd01e5..ce11d89aa30 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) +