diff options
| author | Seungwon Jeon <tgih.jun@samsung.com> | 2014-04-23 17:08:44 +0900 |
|---|---|---|
| committer | Chris Ball <chris@printf.net> | 2014-05-12 18:06:04 -0400 |
| commit | 577fb13199b11d8cd75609183649be4b5561243f (patch) | |
| tree | 8fad9da75d2f2086a2c1ec2ec89d51c1af29e969 /include/linux | |
| parent | 2385049dd52b795f85f2165a6741f370c8493c06 (diff) | |
mmc: rework selection of bus speed mode
Current implementation for bus speed mode selection is too
complicated. This patch is to simplify the codes and remove
some duplicate parts.
The following changes are including:
* Adds functions for each mode selection(HS, HS-DDR, HS200 and etc)
* Rearranged the mode selection sequence with supported device type
* Adds maximum speed for HS200 mode(hs200_max_dtr)
* Adds field definition for HS_TIMING of EXT_CSD
Signed-off-by: Seungwon Jeon <tgih.jun@samsung.com>
Tested-by: Jaehoon Chung <jh80.chung@samsung.com>
Acked-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Chris Ball <chris@printf.net>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/mmc/card.h | 1 | ||||
| -rw-r--r-- | include/linux/mmc/mmc.h | 4 |
2 files changed, 5 insertions, 0 deletions
diff --git a/include/linux/mmc/card.h b/include/linux/mmc/card.h index fe31f8d89a03..176073692872 100644 --- a/include/linux/mmc/card.h +++ b/include/linux/mmc/card.h @@ -63,6 +63,7 @@ struct mmc_ext_csd { unsigned int power_off_longtime; /* Units: ms */ u8 power_off_notification; /* state */ unsigned int hs_max_dtr; + unsigned int hs200_max_dtr; #define MMC_HIGH_26_MAX_DTR 26000000 #define MMC_HIGH_52_MAX_DTR 52000000 #define MMC_HIGH_DDR_MAX_DTR 52000000 diff --git a/include/linux/mmc/mmc.h b/include/linux/mmc/mmc.h index f734c0c64575..f429f13be433 100644 --- a/include/linux/mmc/mmc.h +++ b/include/linux/mmc/mmc.h @@ -377,6 +377,10 @@ struct _mmc_csd { #define EXT_CSD_DDR_BUS_WIDTH_4 5 /* Card is in 4 bit DDR mode */ #define EXT_CSD_DDR_BUS_WIDTH_8 6 /* Card is in 8 bit DDR mode */ +#define EXT_CSD_TIMING_BC 0 /* Backwards compatility */ +#define EXT_CSD_TIMING_HS 1 /* High speed */ +#define EXT_CSD_TIMING_HS200 2 /* HS200 */ + #define EXT_CSD_SEC_ER_EN BIT(0) #define EXT_CSD_SEC_BD_BLK_EN BIT(2) #define EXT_CSD_SEC_GB_CL_EN BIT(4) |