This modification reads the size of the eMMC enhanced user data area
upon initialization of an mmc device, it will be used later by
mmcinfo.
Signed-off-by: Diego Santa Cruz <diego.santac...@spinetix.com>
---
drivers/mmc/mmc.c | 15 +++++++++++++++
include/mmc.h | 4 ++++
2 files changed, 19 insertions(+), 0 deletions(-)
diff --git a/drivers/mmc/mmc.c b/drivers/mmc/mmc.c
index 62b945c..7efa358 100644
--- a/drivers/mmc/mmc.c
+++ b/drivers/mmc/mmc.c
@@ -1028,6 +1028,21 @@ static int mmc_startup(struct mmc *mmc)
has_parts = true;
}
+ mmc->enh_user_size =
+ (ext_csd[EXT_CSD_ENH_SIZE_MULT+2] << 16) +
+ (ext_csd[EXT_CSD_ENH_SIZE_MULT+1] << 8) +
+ ext_csd[EXT_CSD_ENH_SIZE_MULT];
+ mmc->enh_user_size *= ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE];
+ mmc->enh_user_size *= ext_csd[EXT_CSD_HC_WP_GRP_SIZE];
+ mmc->enh_user_size <<= 19;
+ mmc->enh_user_start =
+ (ext_csd[EXT_CSD_ENH_START_ADDR+3] << 24) +
+ (ext_csd[EXT_CSD_ENH_START_ADDR+2] << 16) +
+ (ext_csd[EXT_CSD_ENH_START_ADDR+1] << 8) +
+ ext_csd[EXT_CSD_ENH_START_ADDR];
+ if (mmc->high_capacity)
+ mmc->enh_user_start <<= 9;
+
/*
* Host needs to enable ERASE_GRP_DEF bit if device is
* partitioned. This bit will be lost every time after a reset
diff --git a/include/mmc.h b/include/mmc.h
index 9bf6b20..d1d8ba1 100644
--- a/include/mmc.h
+++ b/include/mmc.h
@@ -146,6 +146,8 @@
/*
* EXT_CSD fields
*/
+#define EXT_CSD_ENH_START_ADDR 136 /* R/W */
+#define EXT_CSD_ENH_SIZE_MULT 140 /* R/W */
#define EXT_CSD_GP_SIZE_MULT 143 /* R/W */
#define EXT_CSD_PART_SETTING_COMPLETED 155 /* R/W */
#define EXT_CSD_PARTITIONS_ATTRIBUTE 156 /* R/W */
@@ -317,6 +319,8 @@ struct mmc {
u64 capacity_boot;
u64 capacity_rpmb;
u64 capacity_gp[4];
+ u64 enh_user_start;
+ u64 enh_user_size;
block_dev_desc_t block_dev;
char op_cond_pending; /* 1 if we are waiting on an op_cond command */
char init_in_progress; /* 1 if we have done mmc_start_init() */
--
1.7.1
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