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| author | Terry Lv <r65388@freescale.com> | 2011-03-21 13:48:07 +0800 |
|---|---|---|
| committer | Terry Lv <r65388@freescale.com> | 2011-03-21 13:59:13 +0800 |
| commit | 682e2a17a1f5241b2488e3af76bef0063260a64e (patch) | |
| tree | f649c8baa5a87373139fda8f0d4d947d002d9019 /drivers/mmc/mmc.c | |
| parent | ac48999b9353d038e95f965af08184dc6342adfc (diff) | |
| download | u-boot-imx-682e2a17a1f5241b2488e3af76bef0063260a64e.zip u-boot-imx-682e2a17a1f5241b2488e3af76bef0063260a64e.tar.gz u-boot-imx-682e2a17a1f5241b2488e3af76bef0063260a64e.tar.bz2 | |
ENGR00140873: MMC may wrongly regconize 2GB eMMC as high capacity
MMC driver may wrongly regconize some 2GB eMMC as high capacity card.
This patch is picked from community.
A non-zero value of SEC_COUNT does not indicate that the card is sector
addressed. According to the MMC specification, cards
with a densitygreater than 2GiB are sector addressed.
Signed-off-by: Terry Lv <r65388@freescale.com>
Diffstat (limited to 'drivers/mmc/mmc.c')
| -rw-r--r-- | drivers/mmc/mmc.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/drivers/mmc/mmc.c b/drivers/mmc/mmc.c index 6fc3be2..ba14330 100644 --- a/drivers/mmc/mmc.c +++ b/drivers/mmc/mmc.c @@ -1,5 +1,5 @@ /* - * (C) Copyright 2008-2010 Freescale Semiconductor, Inc. + * (C) Copyright 2008-2011 Freescale Semiconductor, Inc. * Terry Lv * * Copyright 2008, Freescale Semiconductor, Inc @@ -437,7 +437,9 @@ static int mmc_change_freq(struct mmc *mmc) if (err) goto err_rtn; - if (ext_csd[212] || ext_csd[213] || ext_csd[214] || ext_csd[215]) + /* Cards with density > 2GiB are sector addressed */ + if (ext_csd[212] || ext_csd[213] || ext_csd[214] || ext_csd[215] && + (mmc->capacity > (2u * 1024 * 1024 * 1024) / 512)) mmc->high_capacity = 1; cardtype = ext_csd[EXT_CSD_CARD_TYPE] & 0xf; |