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mmc: Resolve BKOPS compatability issue
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 <alexey.skidanov@sandisk.com> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
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@ -275,7 +275,7 @@ void mmc_start_bkops(struct mmc_card *card, bool from_exception)
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BUG_ON(!card);
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if (!card->ext_csd.bkops_en || mmc_card_doing_bkops(card))
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if (!card->ext_csd.man_bkops_en || mmc_card_doing_bkops(card))
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return;
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err = mmc_read_bkops_status(card);
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@ -483,11 +483,13 @@ static int mmc_decode_ext_csd(struct mmc_card *card, u8 *ext_csd)
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/* check whether the eMMC card supports BKOPS */
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if (ext_csd[EXT_CSD_BKOPS_SUPPORT] & 0x1) {
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card->ext_csd.bkops = 1;
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card->ext_csd.bkops_en = ext_csd[EXT_CSD_BKOPS_EN];
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card->ext_csd.man_bkops_en =
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(ext_csd[EXT_CSD_BKOPS_EN] &
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EXT_CSD_MANUAL_BKOPS_MASK);
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card->ext_csd.raw_bkops_status =
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ext_csd[EXT_CSD_BKOPS_STATUS];
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if (!card->ext_csd.bkops_en)
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pr_info("%s: BKOPS_EN bit is not set\n",
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if (!card->ext_csd.man_bkops_en)
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pr_info("%s: MAN_BKOPS_EN bit is not set\n",
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mmc_hostname(card->host));
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}
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@ -83,7 +83,7 @@ struct mmc_ext_csd {
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bool hpi; /* HPI support bit */
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unsigned int hpi_cmd; /* cmd used as HPI */
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bool bkops; /* background support bit */
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bool bkops_en; /* background enable bit */
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bool man_bkops_en; /* manual bkops enable bit */
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unsigned int data_sector_size; /* 512 bytes or 4KB */
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unsigned int data_tag_unit_size; /* DATA TAG UNIT size */
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unsigned int boot_ro_lock; /* ro lock support */
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@ -427,6 +427,11 @@ struct _mmc_csd {
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*/
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#define EXT_CSD_BKOPS_LEVEL_2 0x2
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/*
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* BKOPS modes
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*/
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#define EXT_CSD_MANUAL_BKOPS_MASK 0x01
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/*
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* MMC_SWITCH access modes
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*/
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