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| author | Adrian Hunter <adrian.hunter@intel.com> | 2017-03-13 14:36:37 +0200 |
|---|---|---|
| committer | Ulf Hansson <ulf.hansson@linaro.org> | 2017-04-24 21:42:02 +0200 |
| commit | b658af718465cd1e8011c8da281befdfc2debefd (patch) | |
| tree | 4c623d3459e8a74c1fd1c23dbf4c0780459ea6b7 /drivers/mmc | |
| parent | 7b410d074b253a44624497a18e73f666a9574f37 (diff) | |
| download | linux-b658af718465cd1e8011c8da281befdfc2debefd.tar.gz linux-b658af718465cd1e8011c8da281befdfc2debefd.tar.bz2 linux-b658af718465cd1e8011c8da281befdfc2debefd.zip | |
mmc: mmc: Add functions to enable / disable the Command Queue
Add helper functions to enable or disable the Command Queue.
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'drivers/mmc')
| -rw-r--r-- | drivers/mmc/core/mmc.c | 2 | ||||
| -rw-r--r-- | drivers/mmc/core/mmc_ops.c | 28 | ||||
| -rw-r--r-- | drivers/mmc/core/mmc_ops.h | 2 |
3 files changed, 32 insertions, 0 deletions
diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c index b502601df228..35b2d0f767ca 100644 --- a/drivers/mmc/core/mmc.c +++ b/drivers/mmc/core/mmc.c @@ -790,6 +790,7 @@ MMC_DEV_ATTR(enhanced_area_size, "%u\n", card->ext_csd.enhanced_area_size); MMC_DEV_ATTR(raw_rpmb_size_mult, "%#x\n", card->ext_csd.raw_rpmb_size_mult); MMC_DEV_ATTR(rel_sectors, "%#x\n", card->ext_csd.rel_sectors); MMC_DEV_ATTR(ocr, "%08x\n", card->ocr); +MMC_DEV_ATTR(cmdq_en, "%d\n", card->ext_csd.cmdq_en); static ssize_t mmc_fwrev_show(struct device *dev, struct device_attribute *attr, @@ -845,6 +846,7 @@ static struct attribute *mmc_std_attrs[] = { &dev_attr_rel_sectors.attr, &dev_attr_ocr.attr, &dev_attr_dsr.attr, + &dev_attr_cmdq_en.attr, NULL, }; ATTRIBUTE_GROUPS(mmc_std); diff --git a/drivers/mmc/core/mmc_ops.c b/drivers/mmc/core/mmc_ops.c index fe80f26d6971..24c58d24c19a 100644 --- a/drivers/mmc/core/mmc_ops.c +++ b/drivers/mmc/core/mmc_ops.c @@ -838,3 +838,31 @@ int mmc_can_ext_csd(struct mmc_card *card) { return (card && card->csd.mmca_vsn > CSD_SPEC_VER_3); } + +static int mmc_cmdq_switch(struct mmc_card *card, bool enable) +{ + u8 val = enable ? EXT_CSD_CMDQ_MODE_ENABLED : 0; + int err; + + if (!card->ext_csd.cmdq_support) + return -EOPNOTSUPP; + + err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_CMDQ_MODE_EN, + val, card->ext_csd.generic_cmd6_time); + if (!err) + card->ext_csd.cmdq_en = enable; + + return err; +} + +int mmc_cmdq_enable(struct mmc_card *card) +{ + return mmc_cmdq_switch(card, true); +} +EXPORT_SYMBOL_GPL(mmc_cmdq_enable); + +int mmc_cmdq_disable(struct mmc_card *card) +{ + return mmc_cmdq_switch(card, false); +} +EXPORT_SYMBOL_GPL(mmc_cmdq_disable); diff --git a/drivers/mmc/core/mmc_ops.h b/drivers/mmc/core/mmc_ops.h index 74beea8a9c7e..978bd2e60f8a 100644 --- a/drivers/mmc/core/mmc_ops.h +++ b/drivers/mmc/core/mmc_ops.h @@ -46,6 +46,8 @@ int mmc_read_bkops_status(struct mmc_card *card); void mmc_start_bkops(struct mmc_card *card, bool from_exception); int mmc_can_reset(struct mmc_card *card); int mmc_flush_cache(struct mmc_card *card); +int mmc_cmdq_enable(struct mmc_card *card); +int mmc_cmdq_disable(struct mmc_card *card); #endif |