diff options
| author | xiaonian <xiaonian@codeaurora.org> | 2015-07-16 14:39:32 +0800 |
|---|---|---|
| committer | Subhash Jadavani <subhashj@codeaurora.org> | 2016-05-31 15:28:11 -0700 |
| commit | d6a8e003e07e1ebafc596e051defb84194c527a2 (patch) | |
| tree | c8a7fde4fe03bdf66e6521dad8acd4d1e9764dc0 /drivers/mmc | |
| parent | 34167033d4ab084678f0adc1bf893c80ed290c84 (diff) | |
mmc: core: set REL_WR_SEC_C register to 0x1 per eMMC5.0 spec
Some eMMC vendors violate eMMC 5.0 spec and set REL_WR_SEC_C
register to 0x10 to indicate the ability of RPMB throughput
improvement thus lead to failure when TZ module write data to
RPMB partition. This change will check bit[4] of EXT_CSD[166]
and if it is not set then change value of REL_WR_SEC_C to 0x1
directly ignoring value of EXT_CSD[222].
CRs-Fixed: 866059
Change-Id: Ibd12c94ad691eca1fa3ea2049b750a6e98178678
Signed-off-by: xiaonian <xiaonian@codeaurora.org>
Signed-off-by: Pavan Anamula <pavana@codeaurora.org>
Diffstat (limited to 'drivers/mmc')
| -rw-r--r-- | drivers/mmc/core/mmc.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c index 818a70b4007d..052cd335490d 100644 --- a/drivers/mmc/core/mmc.c +++ b/drivers/mmc/core/mmc.c @@ -564,6 +564,19 @@ static int mmc_decode_ext_csd(struct mmc_card *card, u8 *ext_csd) card->ext_csd.rst_n_function = ext_csd[EXT_CSD_RST_N_FUNCTION]; /* + * Some eMMC vendors violate eMMC 5.0 spec and set + * REL_WR_SEC_C register to 0x10 to indicate the + * ability of RPMB throughput improvement thus lead + * to failure when TZ module write data to RPMB + * partition. So check bit[4] of EXT_CSD[166] and + * if it is not set then change value of REL_WR_SEC_C + * to 0x1 directly ignoring value of EXT_CSD[222]. + */ + if (!(card->ext_csd.rel_param & + EXT_CSD_WR_REL_PARAM_EN_RPMB_REL_WR)) + card->ext_csd.rel_sectors = 0x1; + + /* * RPMB regions are defined in multiples of 128K. */ card->ext_csd.raw_rpmb_size_mult = ext_csd[EXT_CSD_RPMB_MULT]; |