[U-Boot] [PATCH] arm:goni:mmc: Add sd card detection and initialization.

[Jaehoon Chung]

Hi,

On 09/03/2013 09:45 PM, Przemyslaw Marczak wrote:
> This change allow to use sd card on Goni the same like mmc 0.
> SD card is mmc dev 1, so it can be used like this: "fatls mmc 1:2".
> SD card is inited even if eMMC initialization fails.
> 
> Signed-off-by: Przemyslaw Marczak <p.marczak at samsung.com>
> Signed-off-by: Kyungmin Park <kyungmin.park at samsung.com>
> CC: Minkyu Kang <mk7.kang at samsung.com>
> ---
>  board/samsung/goni/goni.c |   31 ++++++++++++++++++++++++++++++-
>  1 file changed, 30 insertions(+), 1 deletion(-)
> 
> diff --git a/board/samsung/goni/goni.c b/board/samsung/goni/goni.c
> index 5b3d6ef..7098fe7 100644
> --- a/board/samsung/goni/goni.c
> +++ b/board/samsung/goni/goni.c
> @@ -73,6 +73,7 @@ int checkboard(void)
>  int board_mmc_init(bd_t *bis)
>  {
>  	int i;
> +	int ret;
>  
>  	/* MASSMEMORY_EN: XMSMDATA7: GPJ2[7] output high */
>  	s5p_gpio_direction_output(&s5pc110_gpio->j2, 7, 1);
> @@ -95,7 +96,35 @@ int board_mmc_init(bd_t *bis)
>  		s5p_gpio_set_drv(&s5pc110_gpio->g0, i, GPIO_DRV_4X);
>  	}
>  
> -	return s5p_mmc_init(0, 4);
> +	ret = s5p_mmc_init(0, 4);
> +	if (ret) {
> +		puts("MMC: Failed to init MMC:0.\n");
> +	}
> +
> +	/*
> +	 * SD card (T_FLASH) detect and init
> +	 * T_FLASH_DETECT: EINT28: GPH3[4] input mode
> +	 */
> +	s5p_gpio_cfg_pin(&s5pc110_gpio->h3, 4, GPIO_INPUT);
> +	s5p_gpio_set_pull(&s5pc110_gpio->h3, 4, GPIO_PULL_UP);
> +
> +	if (!s5p_gpio_get_value(&s5pc110_gpio->h3, 4)) {
> +		for (i = 0; i < 7; i++) {
> +			if (i == 2)
> +				continue;
> +			/* GPG2[0:6] special function 2 */
> +			s5p_gpio_cfg_pin(&s5pc110_gpio->g2, i, 0x2);
> +			/* GPG2[0:6] pull disable */
> +			s5p_gpio_set_pull(&s5pc110_gpio->g2, i, GPIO_PULL_NONE);
> +			/* GPG2[0:6] drv 4x */
> +			s5p_gpio_set_drv(&s5pc110_gpio->g2, i, GPIO_DRV_4X);
> +		}
> +		if (s5p_mmc_init(2, 4))
> +			puts("MMC: Failed to init SD card (MMC:2).\n");

Well, i think this is not good.

ret = s5p_mmc_init(2, 5)
if (ret) {
	....
}
return ret;

Your checking is always returned "fail",if emmc is failed.

Best Regards,
Jaehoon Chung

> +	}
> +
> +	/* SD card init is optional so print information when it fails only */
> +	return ret;
>  }
>  #endif
>  
>