Hi, Markus.
On 11/18/2014 11:11 PM, Markus Niebel wrote:
From: Markus Niebel Markus.Niebel@tq-group.com
if the card claims to be high capacity and the card is partitioned the capacity shall still be read from ext_csd SEC_COUNT even if the resulting capacity is smaller than 2 GiB
I have one question. "smaller than 2GiB" means the size after completed partition?
Best Regards, Jaehoon Chung
Signed-off-by: Markus Niebel Markus.Niebel@tq-group.com
drivers/mmc/mmc.c | 15 +++++++++++++++ include/mmc.h | 3 +++ 2 files changed, 18 insertions(+)
diff --git a/drivers/mmc/mmc.c b/drivers/mmc/mmc.c index 44a4feb..24b0989 100644 --- a/drivers/mmc/mmc.c +++ b/drivers/mmc/mmc.c @@ -1022,6 +1022,21 @@ static int mmc_startup(struct mmc *mmc) mmc->erase_grp_size = ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE] * MMC_MAX_BLOCK_LEN * 1024;
/** if high capacity and partition setting completed* SEC_COUNT is valid even if it is smaller than 2 GiB* JEDEC Standard JESD84-B45, 6.2.4*/if (mmc->high_capacity &&(ext_csd[EXT_CSD_PARTITION_SETTING] &EXT_CSD_PARTITION_SETTING_COMPLETED)) {capacity = (ext_csd[EXT_CSD_SEC_CNT]) |(ext_csd[EXT_CSD_SEC_CNT + 1] << 8) |(ext_csd[EXT_CSD_SEC_CNT + 2] << 16) |(ext_csd[EXT_CSD_SEC_CNT + 3] << 24);capacity *= MMC_MAX_BLOCK_LEN;mmc->capacity_user = capacity;}diff --git a/include/mmc.h b/include/mmc.h index d74a190..cb91565 100644 --- a/include/mmc.h +++ b/include/mmc.h @@ -147,6 +147,7 @@
- EXT_CSD fields
*/ #define EXT_CSD_GP_SIZE_MULT 143 /* R/W */ +#define EXT_CSD_PARTITION_SETTING 155 /* R/W */ #define EXT_CSD_PARTITIONS_ATTRIBUTE 156 /* R/W */ #define EXT_CSD_PARTITIONING_SUPPORT 160 /* RO */ #define EXT_CSD_RST_N_FUNCTION 162 /* R/W */ @@ -197,6 +198,8 @@ #define EXT_CSD_BOOT_BUS_WIDTH_RESET(x) (x << 2) #define EXT_CSD_BOOT_BUS_WIDTH_WIDTH(x) (x)
+#define EXT_CSD_PARTITION_SETTING_COMPLETED (1 << 0)
#define R1_ILLEGAL_COMMAND (1 << 22) #define R1_APP_CMD (1 << 5)