diff options
| author | Adrian Hunter <adrian.hunter@nokia.com> | 2010-10-11 11:43:50 +0200 |
|---|---|---|
| committer | Chris Ball <cjb@laptop.org> | 2010-10-23 15:11:16 +0200 |
| commit | 49e3b5a44f8abd33c8693edc575c6d06a210d778 (patch) | |
| tree | a68dfc6613a17d1c0eb68d87d63a3562eea26a80 | |
| parent | mmc: Fixes for Dual Data Rate (DDR) support (diff) | |
| download | linux-49e3b5a44f8abd33c8693edc575c6d06a210d778.tar.xz linux-49e3b5a44f8abd33c8693edc575c6d06a210d778.zip | |
mmc: refine DDR support
One flaw with DDR support is that MMC core does not inform the driver
which DDR mode it has selected. This patch expands the ios->ddr flag
to do that.
Signed-off-by: Adrian Hunter <adrian.hunter@nokia.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
| -rw-r--r-- | drivers/mmc/core/core.c | 7 | ||||
| -rw-r--r-- | drivers/mmc/core/core.h | 3 | ||||
| -rw-r--r-- | drivers/mmc/core/mmc.c | 6 | ||||
| -rw-r--r-- | include/linux/mmc/host.h | 3 |
4 files changed, 11 insertions, 8 deletions
diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c index 7cb352b3b247..3eb7a9be6d8d 100644 --- a/drivers/mmc/core/core.c +++ b/drivers/mmc/core/core.c @@ -653,10 +653,11 @@ void mmc_set_bus_mode(struct mmc_host *host, unsigned int mode) /* * Change data bus width and DDR mode of a host. */ -void mmc_set_bus_width_ddr(struct mmc_host *host, unsigned int width, int ddr) +void mmc_set_bus_width_ddr(struct mmc_host *host, unsigned int width, + unsigned int ddr) { host->ios.bus_width = width; - host->ios.ddr = ddr ? MMC_DDR_MODE : MMC_SDR_MODE; + host->ios.ddr = ddr; mmc_set_ios(host); } @@ -665,7 +666,7 @@ void mmc_set_bus_width_ddr(struct mmc_host *host, unsigned int width, int ddr) */ void mmc_set_bus_width(struct mmc_host *host, unsigned int width) { - mmc_set_bus_width_ddr(host, width, 0); + mmc_set_bus_width_ddr(host, width, MMC_SDR_MODE); } /** diff --git a/drivers/mmc/core/core.h b/drivers/mmc/core/core.h index 13240d128a69..a971b0667aad 100644 --- a/drivers/mmc/core/core.h +++ b/drivers/mmc/core/core.h @@ -35,7 +35,8 @@ void mmc_set_chip_select(struct mmc_host *host, int mode); void mmc_set_clock(struct mmc_host *host, unsigned int hz); void mmc_set_bus_mode(struct mmc_host *host, unsigned int mode); void mmc_set_bus_width(struct mmc_host *host, unsigned int width); -void mmc_set_bus_width_ddr(struct mmc_host *host, unsigned int width, int ddr); +void mmc_set_bus_width_ddr(struct mmc_host *host, unsigned int width, + unsigned int ddr); u32 mmc_select_voltage(struct mmc_host *host, u32 ocr); void mmc_set_timing(struct mmc_host *host, unsigned int timing); diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c index 3ea58ce773ff..df2a817303b4 100644 --- a/drivers/mmc/core/mmc.c +++ b/drivers/mmc/core/mmc.c @@ -375,7 +375,7 @@ static int mmc_init_card(struct mmc_host *host, u32 ocr, struct mmc_card *oldcard) { struct mmc_card *card; - int err, ddr = 0; + int err, ddr = MMC_SDR_MODE; u32 cid[4]; unsigned int max_dtr; @@ -523,10 +523,10 @@ static int mmc_init_card(struct mmc_host *host, u32 ocr, if (mmc_card_highspeed(card)) { if ((card->ext_csd.card_type & EXT_CSD_CARD_TYPE_DDR_1_8V) && (host->caps & (MMC_CAP_1_8V_DDR))) - ddr = 1; + ddr = MMC_1_8V_DDR_MODE; else if ((card->ext_csd.card_type & EXT_CSD_CARD_TYPE_DDR_1_2V) && (host->caps & (MMC_CAP_1_2V_DDR))) - ddr = 1; + ddr = MMC_1_2V_DDR_MODE; } /* diff --git a/include/linux/mmc/host.h b/include/linux/mmc/host.h index c4fb1c5efc44..69ee1ebe4302 100644 --- a/include/linux/mmc/host.h +++ b/include/linux/mmc/host.h @@ -54,7 +54,8 @@ struct mmc_ios { unsigned char ddr; /* dual data rate used */ #define MMC_SDR_MODE 0 -#define MMC_DDR_MODE 1 +#define MMC_1_2V_DDR_MODE 1 +#define MMC_1_8V_DDR_MODE 2 }; struct mmc_host_ops { |