diff options
| author | Adrian Hunter <adrian.hunter@intel.com> | 2011-08-29 17:42:11 +0400 |
|---|---|---|
| committer | Chris Ball <cjb@laptop.org> | 2011-10-27 00:32:05 +0400 |
| commit | b2499518b5ad7e28bb3ed348fd3f370eeb1e36c0 (patch) | |
| tree | c4c9597d0631554bffeecbcc6a2a7ec3037ea78c /include/linux/mmc/mmc.h | |
| parent | 8e3336b1e4378f7d205af9b25dcc9e645c8a9609 (diff) | |
| download | linux-b2499518b5ad7e28bb3ed348fd3f370eeb1e36c0.tar.xz | |
mmc: core: add eMMC hardware reset support
eMMC's may have a hardware reset line. This patch provides a
host controller operation to implement hardware reset and
a function to reset and reinitialize the card. Also, for MMC,
the reset is always performed before initialization.
The host must set the new host capability MMC_CAP_HW_RESET
to enable hardware reset.
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
Diffstat (limited to 'include/linux/mmc/mmc.h')
| -rw-r--r-- | include/linux/mmc/mmc.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/include/linux/mmc/mmc.h b/include/linux/mmc/mmc.h index 5a794cb503ea..ed8fca890ee2 100644 --- a/include/linux/mmc/mmc.h +++ b/include/linux/mmc/mmc.h @@ -272,6 +272,7 @@ struct _mmc_csd { #define EXT_CSD_PARTITION_ATTRIBUTE 156 /* R/W */ #define EXT_CSD_PARTITION_SUPPORT 160 /* RO */ +#define EXT_CSD_RST_N_FUNCTION 162 /* R/W */ #define EXT_CSD_WR_REL_PARAM 166 /* RO */ #define EXT_CSD_ERASE_GROUP_DEF 175 /* R/W */ #define EXT_CSD_PART_CONFIG 179 /* R/W */ @@ -328,6 +329,9 @@ struct _mmc_csd { #define EXT_CSD_SEC_BD_BLK_EN BIT(2) #define EXT_CSD_SEC_GB_CL_EN BIT(4) +#define EXT_CSD_RST_N_EN_MASK 0x3 +#define EXT_CSD_RST_N_ENABLED 1 /* RST_n is enabled on card */ + /* * MMC_SWITCH access modes */ |