diff options
| author | Alexey Skidanov <alexey.skidanov@sandisk.com> | 2015-01-29 11:49:43 +0300 |
|---|---|---|
| committer | Ulf Hansson <ulf.hansson@linaro.org> | 2015-01-29 13:15:12 +0300 |
| commit | 0501be6429e4eb02f417ad83eacd84b8c57b0283 (patch) | |
| tree | c56a75eb3b4c00bdab0925cb6e72e15e592684d4 | |
| parent | 14460dbaf7a5a0488963fdb8232ad5c8a8cca7b7 (diff) | |
| download | linux-0501be6429e4eb02f417ad83eacd84b8c57b0283.tar.xz | |
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>
| -rw-r--r-- | drivers/mmc/core/core.c | 2 | ||||
| -rw-r--r-- | drivers/mmc/core/mmc.c | 8 | ||||
| -rw-r--r-- | include/linux/mmc/card.h | 2 | ||||
| -rw-r--r-- | include/linux/mmc/mmc.h | 5 |
4 files changed, 12 insertions, 5 deletions
diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c index 1be7055548cb..0dc64e6e00d4 100644 --- a/drivers/mmc/core/core.c +++ b/drivers/mmc/core/core.c @@ -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); diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c index 1fc48a280659..1d41e8541f38 100644 --- a/drivers/mmc/core/mmc.c +++ b/drivers/mmc/core/mmc.c @@ -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)); } diff --git a/include/linux/mmc/card.h b/include/linux/mmc/card.h index 4d69c00497bd..a6cf4c063e4e 100644 --- a/include/linux/mmc/card.h +++ b/include/linux/mmc/card.h @@ -83,7 +83,7 @@ struct mmc_ext_csd { bool hpi; /* HPI support bit */ unsigned int hpi_cmd; /* cmd used as HPI */ bool bkops; /* background support bit */ - bool bkops_en; /* background enable bit */ + bool man_bkops_en; /* manual bkops enable bit */ unsigned int data_sector_size; /* 512 bytes or 4KB */ unsigned int data_tag_unit_size; /* DATA TAG UNIT size */ unsigned int boot_ro_lock; /* ro lock support */ diff --git a/include/linux/mmc/mmc.h b/include/linux/mmc/mmc.h index fb97b5cc91cd..124f562118b8 100644 --- a/include/linux/mmc/mmc.h +++ b/include/linux/mmc/mmc.h @@ -428,6 +428,11 @@ struct _mmc_csd { #define EXT_CSD_BKOPS_LEVEL_2 0x2 /* + * BKOPS modes + */ +#define EXT_CSD_MANUAL_BKOPS_MASK 0x01 + +/* * MMC_SWITCH access modes */ |