From a7f852b6885dc7b89741b1e76921e160b9c9877b Mon Sep 17 00:00:00 2001 From: Diego Santa Cruz Date: Tue, 23 Dec 2014 10:50:22 +0100 Subject: 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 --- drivers/mmc/mmc.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+) (limited to 'drivers/mmc') 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 -- cgit v1.1