mmc: read the size of eMMC enhanced user data area
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.SantaCruz@spinetix.com>
diff --git a/drivers/mmc/mmc.c b/drivers/mmc/mmc.c
index 86c4db9..f07505f 100644
--- a/drivers/mmc/mmc.c
+++ b/drivers/mmc/mmc.c
@@ -1031,6 +1031,21 @@
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