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| author | Jaehoon Chung <jh80.chung@samsung.com> | 2010-09-27 15:43:52 +0900 |
|---|---|---|
| committer | Minkyu Kang <mk7.kang@samsung.com> | 2010-10-19 11:34:54 +0900 |
| commit | 1727e216987a2d4e3e220f8c09e4bb54a611d21e (patch) | |
| tree | 516cb0f48465b36d7c8ed2f030813ee8164e92d5 | |
| parent | b485556be51d1edae0a2c0065e2f572ca42a1eee (diff) | |
| download | blackbird-obmc-uboot-1727e216987a2d4e3e220f8c09e4bb54a611d21e.tar.gz blackbird-obmc-uboot-1727e216987a2d4e3e220f8c09e4bb54a611d21e.zip | |
s5p_mmc: support 8-bit bus width
This Patch do support 8-bit bus width for s5p
So we add parameter for bus_width (in s5p_mmc_init(), s5p_mmc_initialize())
If want to use 8-bit bus width, only change (0, 8) instead of (0, 4).
Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
| -rw-r--r-- | arch/arm/include/asm/arch-s5pc1xx/mmc.h | 2 | ||||
| -rw-r--r-- | board/samsung/goni/goni.c | 2 | ||||
| -rw-r--r-- | drivers/mmc/s5p_mmc.c | 19 |
3 files changed, 16 insertions, 7 deletions
diff --git a/arch/arm/include/asm/arch-s5pc1xx/mmc.h b/arch/arm/include/asm/arch-s5pc1xx/mmc.h index 68c59d13e3..48de64d9c3 100644 --- a/arch/arm/include/asm/arch-s5pc1xx/mmc.h +++ b/arch/arm/include/asm/arch-s5pc1xx/mmc.h @@ -65,7 +65,7 @@ struct mmc_host { unsigned int clock; /* Current clock (MHz) */ }; -int s5p_mmc_init(int dev_index); +int s5p_mmc_init(int dev_index, int bus_width); #endif /* __ASSEMBLY__ */ #endif diff --git a/board/samsung/goni/goni.c b/board/samsung/goni/goni.c index 4336729113..0b09ebaf89 100644 --- a/board/samsung/goni/goni.c +++ b/board/samsung/goni/goni.c @@ -87,6 +87,6 @@ int board_mmc_init(bd_t *bis) gpio_set_drv(&s5pc110_gpio->g0, i, GPIO_DRV_4X); } - return s5p_mmc_init(0); + return s5p_mmc_init(0, 4); } #endif diff --git a/drivers/mmc/s5p_mmc.c b/drivers/mmc/s5p_mmc.c index 1fd425cbb6..195b5be39e 100644 --- a/drivers/mmc/s5p_mmc.c +++ b/drivers/mmc/s5p_mmc.c @@ -352,11 +352,16 @@ static void mmc_set_ios(struct mmc *mmc) ctrl = readb(&host->reg->hostctl); /* + * WIDE8[5] + * 0 = Depend on WIDE4 + * 1 = 8-bit mode * WIDE4[1] * 1 = 4-bit mode * 0 = 1-bit mode */ - if (mmc->bus_width == 4) + if (mmc->bus_width == 8) + ctrl |= (1 << 5); + else if (mmc->bus_width == 4) ctrl |= (1 << 1); else ctrl &= ~(1 << 1); @@ -437,7 +442,7 @@ static int mmc_core_init(struct mmc *mmc) return 0; } -static int s5p_mmc_initialize(int dev_index) +static int s5p_mmc_initialize(int dev_index, int bus_width) { struct mmc *mmc; @@ -450,7 +455,11 @@ static int s5p_mmc_initialize(int dev_index) mmc->init = mmc_core_init; mmc->voltages = MMC_VDD_32_33 | MMC_VDD_33_34 | MMC_VDD_165_195; - mmc->host_caps = MMC_MODE_4BIT | MMC_MODE_HS_52MHz | MMC_MODE_HS; + if (bus_width == 8) + mmc->host_caps = MMC_MODE_8BIT; + else + mmc->host_caps = MMC_MODE_4BIT; + mmc->host_caps |= MMC_MODE_HS_52MHz | MMC_MODE_HS; mmc->f_min = 400000; mmc->f_max = 52000000; @@ -462,7 +471,7 @@ static int s5p_mmc_initialize(int dev_index) return 0; } -int s5p_mmc_init(int dev_index) +int s5p_mmc_init(int dev_index, int bus_width) { - return s5p_mmc_initialize(dev_index); + return s5p_mmc_initialize(dev_index, bus_width); } |
