diff options
| author | Adrian Hunter <adrian.hunter@intel.com> | 2016-11-29 13:09:16 +0300 |
|---|---|---|
| committer | Ulf Hansson <ulf.hansson@linaro.org> | 2016-12-05 12:31:07 +0300 |
| commit | 925ff3a7a334b3fe968ae15f07d22df21addad26 (patch) | |
| tree | 2d08f3ba869f36d747072d6ed8841fc71f02a11a /drivers | |
| parent | c5bda0ca6fab8e040c8ea3c71fdd16deee0f132f (diff) | |
| download | linux-925ff3a7a334b3fe968ae15f07d22df21addad26.tar.xz | |
mmc: mmc: Add Command Queue definitions
Add definitions relating to Command Queuing.
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')
| -rw-r--r-- | drivers/mmc/core/mmc.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c index 3268fcd3378d..16cf6ea6e1ba 100644 --- a/drivers/mmc/core/mmc.c +++ b/drivers/mmc/core/mmc.c @@ -618,6 +618,24 @@ static int mmc_decode_ext_csd(struct mmc_card *card, u8 *ext_csd) (ext_csd[EXT_CSD_SUPPORTED_MODE] & 0x1) && !(ext_csd[EXT_CSD_FW_CONFIG] & 0x1); } + + /* eMMC v5.1 or later */ + if (card->ext_csd.rev >= 8) { + card->ext_csd.cmdq_support = ext_csd[EXT_CSD_CMDQ_SUPPORT] & + EXT_CSD_CMDQ_SUPPORTED; + card->ext_csd.cmdq_depth = (ext_csd[EXT_CSD_CMDQ_DEPTH] & + EXT_CSD_CMDQ_DEPTH_MASK) + 1; + /* Exclude inefficiently small queue depths */ + if (card->ext_csd.cmdq_depth <= 2) { + card->ext_csd.cmdq_support = false; + card->ext_csd.cmdq_depth = 0; + } + if (card->ext_csd.cmdq_support) { + pr_debug("%s: Command Queue supported depth %u\n", + mmc_hostname(card->host), + card->ext_csd.cmdq_depth); + } + } out: return err; } |