diff options
| author | Doug Anderson <dianders@chromium.org> | 2014-08-22 19:17:51 +0530 |
|---|---|---|
| committer | Ulf Hansson <ulf.hansson@linaro.org> | 2014-09-09 13:59:18 +0200 |
| commit | 0173055842cd1d9ed3984e70891c22dbf2f29372 (patch) | |
| tree | d3f35f45b4a78e36b5426d49baadebc79401fb01 /drivers/mmc/host/dw_mmc.h | |
| parent | 51da2240906cb94e8f6ba55e403b6206df6fb2dd (diff) | |
| download | linux-0173055842cd1d9ed3984e70891c22dbf2f29372.tar.gz | |
mmc: dw_mmc: Support voltage changes
For UHS cards we need the ability to switch voltages from 3.3V to 1.8V. Add support to the dw_mmc driver to handle this. Note that dw_mmc needs a little bit of extra code since the interface needs a special bit programmed to the CMD register while CMD11 is progressing. This means adding a few extra states to the state machine to track. Signed-off-by: Doug Anderson <dianders@chromium.org> Signed-off-by: Yuvaraj Kumar C D <yuvaraj.cd@samsung.com> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'drivers/mmc/host/dw_mmc.h')
| -rw-r--r-- | drivers/mmc/host/dw_mmc.h | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/mmc/host/dw_mmc.h b/drivers/mmc/host/dw_mmc.h index 08fd956d81f3..01b99e8a9190 100644 --- a/drivers/mmc/host/dw_mmc.h +++ b/drivers/mmc/host/dw_mmc.h @@ -99,6 +99,7 @@ #define SDMMC_INT_HLE BIT(12) #define SDMMC_INT_FRUN BIT(11) #define SDMMC_INT_HTO BIT(10) +#define SDMMC_INT_VOLT_SWITCH BIT(10) /* overloads bit 10! */ #define SDMMC_INT_DRTO BIT(9) #define SDMMC_INT_RTO BIT(8) #define SDMMC_INT_DCRC BIT(7) @@ -113,6 +114,7 @@ /* Command register defines */ #define SDMMC_CMD_START BIT(31) #define SDMMC_CMD_USE_HOLD_REG BIT(29) +#define SDMMC_CMD_VOLT_SWITCH BIT(28) #define SDMMC_CMD_CCS_EXP BIT(23) #define SDMMC_CMD_CEATA_RD BIT(22) #define SDMMC_CMD_UPD_CLK BIT(21) @@ -130,6 +132,7 @@ /* Status register defines */ #define SDMMC_GET_FCNT(x) (((x)>>17) & 0x1FFF) #define SDMMC_STATUS_DMA_REQ BIT(31) +#define SDMMC_STATUS_BUSY BIT(9) /* FIFOTH register defines */ #define SDMMC_SET_FIFOTH(m, r, t) (((m) & 0x7) << 28 | \ ((r) & 0xFFF) << 16 | \ @@ -150,7 +153,7 @@ #define SDMMC_GET_VERID(x) ((x) & 0xFFFF) /* Card read threshold */ #define SDMMC_SET_RD_THLD(v, x) (((v) & 0x1FFF) << 16 | (x)) - +#define SDMMC_UHS_18V BIT(0) /* All ctrl reset bits */ #define SDMMC_CTRL_ALL_RESET_FLAGS \ (SDMMC_CTRL_RESET | SDMMC_CTRL_FIFO_RESET | SDMMC_CTRL_DMA_RESET) |