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authorDiego Santa Cruz <Diego.SantaCruz@spinetix.com>2014-12-23 10:50:22 +0100
committerPantelis Antoniou <pantelis.antoniou@konsulko.com>2015-01-19 17:02:29 +0200
commita7f852b6885dc7b89741b1e76921e160b9c9877b (patch)
tree4df36b554ec37f5eaf625265d739ef1296ba43d2 /drivers
parentf8e89d67166bbcd34a3144b8001b3819b58d02c9 (diff)
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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>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/mmc/mmc.c15
1 files changed, 15 insertions, 0 deletions
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 @@ 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