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| author | Adrian Hunter <adrian.hunter@nokia.com> | 2010-08-24 13:20:26 +0300 |
|---|---|---|
| committer | Chris Ball <cjb@laptop.org> | 2010-10-23 21:11:16 +0800 |
| commit | 0f8d8ea64ec7c77ca5beb59534d386fe0235961a (patch) | |
| tree | 8d6aebd250897aa33cb166994720497f40a9aaa6 /include/linux/mmc | |
| parent | dfc13e8402c75e7c2e0a52e123c0500a3259866b (diff) | |
| download | kernel_samsung_smdk4412-0f8d8ea64ec7c77ca5beb59534d386fe0235961a.zip kernel_samsung_smdk4412-0f8d8ea64ec7c77ca5beb59534d386fe0235961a.tar.gz kernel_samsung_smdk4412-0f8d8ea64ec7c77ca5beb59534d386fe0235961a.tar.bz2 | |
mmc: Fixes for Dual Data Rate (DDR) support
The DDR support patch needs the following fixes:
- The block driver does not need to know about DDR, any more
than it needs to know about bus width.
- Not only the card must be switched to DDR mode. The host
controller must also be configured, which is done through
the 'set_ios()' function.
- Do not set the DDR mode state until after the switch command
is successful.
- Setting block length is not supported in DDR mode. Make that
a core function and change the other place it is used (mmc_test)
also.
Signed-off-by: Adrian Hunter <adrian.hunter@nokia.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
Diffstat (limited to 'include/linux/mmc')
| -rw-r--r-- | include/linux/mmc/core.h | 3 | ||||
| -rw-r--r-- | include/linux/mmc/host.h | 5 |
2 files changed, 7 insertions, 1 deletions
diff --git a/include/linux/mmc/core.h b/include/linux/mmc/core.h index d0fbcac..64e013f 100644 --- a/include/linux/mmc/core.h +++ b/include/linux/mmc/core.h @@ -109,7 +109,6 @@ struct mmc_data { #define MMC_DATA_WRITE (1 << 8) #define MMC_DATA_READ (1 << 9) #define MMC_DATA_STREAM (1 << 10) -#define MMC_DDR_MODE (1 << 11) unsigned int bytes_xfered; @@ -154,6 +153,8 @@ extern int mmc_can_secure_erase_trim(struct mmc_card *card); extern int mmc_erase_group_aligned(struct mmc_card *card, unsigned int from, unsigned int nr); +extern int mmc_set_blocklen(struct mmc_card *card, unsigned int blocklen); + extern void mmc_set_data_timeout(struct mmc_data *, const struct mmc_card *); extern unsigned int mmc_align_data_size(struct mmc_card *, unsigned int); diff --git a/include/linux/mmc/host.h b/include/linux/mmc/host.h index 6711eb8..c4fb1c5 100644 --- a/include/linux/mmc/host.h +++ b/include/linux/mmc/host.h @@ -50,6 +50,11 @@ struct mmc_ios { #define MMC_TIMING_LEGACY 0 #define MMC_TIMING_MMC_HS 1 #define MMC_TIMING_SD_HS 2 + + unsigned char ddr; /* dual data rate used */ + +#define MMC_SDR_MODE 0 +#define MMC_DDR_MODE 1 }; struct mmc_host_ops { |