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mmc: Resolve BKOPS compatability issue

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This patch is coming to fix compatibility issue of BKOPS_EN  field of EXT_CSD.
In eMMC-5.1, BKOPS_EN was changed, and now it has two operational bits:
Bit 0 - MANUAL_EN
Bit 1 - AUTO_EN
In previous eMMC revisions, only Bit 0 was supported.

Signed-off-by: Alexey Skidanov <[email protected]>
Signed-off-by: Ulf Hansson <[email protected]>
This commit is contained in:
Alexey Skidanov 2015-01-29 10:49:43 +02:00 • committed by Ulf Hansson
commit 0501be6429
4 changed files with 12 additions and 5 deletions
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2
drivers/mmc/core/core.c
View file

@ -275,7 +275,7 @@ void mmc_start_bkops(struct mmc_card *card, bool from_exception)
BUG_ON(!card);
if (!card->ext_csd.bkops_en || mmc_card_doing_bkops(card))
if (!card->ext_csd.man_bkops_en || mmc_card_doing_bkops(card))
return;
err = mmc_read_bkops_status(card);

8
drivers/mmc/core/mmc.c
View file

@ -483,11 +483,13 @@ static int mmc_decode_ext_csd(struct mmc_card *card, u8 *ext_csd)
/* check whether the eMMC card supports BKOPS */
if (ext_csd[EXT_CSD_BKOPS_SUPPORT] & 0x1) {
card->ext_csd.bkops = 1;
card->ext_csd.bkops_en = ext_csd[EXT_CSD_BKOPS_EN];
card->ext_csd.man_bkops_en =
(ext_csd[EXT_CSD_BKOPS_EN] &
EXT_CSD_MANUAL_BKOPS_MASK);
card->ext_csd.raw_bkops_status =
ext_csd[EXT_CSD_BKOPS_STATUS];
if (!card->ext_csd.bkops_en)
pr_info("%s: BKOPS_EN bit is not set\n",
if (!card->ext_csd.man_bkops_en)
pr_info("%s: MAN_BKOPS_EN bit is not set\n",
mmc_hostname(card->host));
}