[U-Boot] [PATCH 1/3] board: samsung: trats2: Add DW MMC controller initialization

[Minkyu Kang <mk7.kang@samsung.com>]

On 05/03/14 10:57, Beomho Seo wrote:
> Add DW MMC controller initialization.
> Selectively use DW MMC controller instead of SDHCI controller.
> 
> Signed-off-by: Beomho Seo <beomho.seo@samsung.com>
> Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
> Cc: Minkyu Kang <mk7.kang@samsung.com>
> ---
>  board/samsung/trats2/trats2.c |   31 +++++++++++++++++++++----------
>  1 file changed, 21 insertions(+), 10 deletions(-)
> 
> diff --git a/board/samsung/trats2/trats2.c b/board/samsung/trats2/trats2.c
> index c17c24d..11bebb9 100644
> --- a/board/samsung/trats2/trats2.c
> +++ b/board/samsung/trats2/trats2.c
> @@ -11,6 +11,7 @@
>  #include <asm/io.h>
>  #include <asm/arch/gpio.h>
>  #include <asm/arch/mmc.h>
> +#include <asm/arch/dwmmc.h>
>  #include <asm/arch/power.h>
>  #include <asm/arch/clk.h>
>  #include <asm/arch/clock.h>
> @@ -280,18 +281,19 @@ int board_mmc_init(bd_t *bis)
> 
>  	gpio2 = (struct exynos4x12_gpio_part2 *)samsung_get_base_gpio_part2();
> 
> -	/* eMMC_EN: SD_0_CDn: GPK0[2] Output High */
> +	/* eMMC_EN: SD_0_CDn or SD_4_CDn: GPK0[2] Output High */
>  	s5p_gpio_direction_output(&gpio2->k0, 2, 1);
>  	s5p_gpio_set_pull(&gpio2->k0, 2, GPIO_PULL_NONE);
> 
>  	/*
>  	 * eMMC GPIO:
>  	 * SDR 8-bit at 48MHz at MMC0
> -	 * GPK0[0]      SD_0_CLK(2)
> -	 * GPK0[1]      SD_0_CMD(2)
> -	 * GPK0[2]      SD_0_CDn        -> Not used
> -	 * GPK0[3:6]    SD_0_DATA[0:3](2)
> -	 * GPK1[3:6]    SD_0_DATA[0:3](3)
> +	 *		SDHCI			DW-MMC
> +	 * GPK0[0]      SD_0_CLK(2)		SD_4_CLK(3)
> +	 * GPK0[1]      SD_0_CMD(2)		SD_4_CMD(3)
> +	 * GPK0[2]      SD_0_CDn		SD_4_CDn	-> Not used
> +	 * GPK0[3:6]    SD_0_DATA[0:3](2)	SD_4_DATA[0:3](3)
> +	 * GPK1[3:6]    SD_0_DATA[4:7](3)	SD_4_DATA[4:7](4)
>  	 *
>  	 * DDR 4-bit at 26MHz at MMC4
>  	 * GPK0[0]      SD_4_CLK(3)
> @@ -301,17 +303,26 @@ int board_mmc_init(bd_t *bis)
>  	 * GPK1[3:6]    SD_4_DATA[4:7](4)
>  	 */
> 
> -	err0 = exynos_pinmux_config(PERIPH_ID_SDMMC0, PINMUX_FLAG_8BIT_MODE);
> -
>  	/*
>  	 * MMC device init
> -	 * mmc0  : eMMC (8-bit buswidth)
> -	 * mmc2  : SD card (4-bit buswidth)
> +	 * mmc0  : eMMC, sdhci controller (8-bit buswidth)
> +	 * mmc2  : SD card, sdhci controller (4-bit buswidth)
> +	 * mmc4  : eMMC, dw-mmc controller (8-bit buswidth)
>  	 */
> +
> +#ifndef CONFIG_DWMMC
> +	err0 = exynos_pinmux_config(PERIPH_ID_SDMMC0, PINMUX_FLAG_8BIT_MODE);
>  	if (err0)
>  		debug("SDMMC0 not configured\n");
>  	else
>  		err0 = s5p_mmc_init(0, 8);
> +#else
> +	err0 = exynos_pinmux_config(PERIPH_ID_SDMMC4, PINMUX_FLAG_8BIT_MODE);
> +	if (err0)
> +		debug("SDMMC4 not configured\n");
> +	else
> +		err0 = exynos_dwmci_add_port(4, 0x12550000, 8, 0x00010000);

what means 0x12550000, 0x00010000?

> +#endif
> 
>  	/* T-flash detect */
>  	s5p_gpio_cfg_pin(&gpio2->x3, 4, 0xf);
> 

Thanks,
Minkyu Kang.