[U-Boot] [PATCH v3] arm:goni:mmc: Add sd card detection and initialization.

[Jaehoon Chung <jh80.chung@samsung.com>]

Looks good to me.

Acked-by: Jaehoon Chung <jh80.chung@samsung.com>

On 09/10/2013 06:34 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@samsung.com>
> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
> CC: Minkyu Kang <mk7.kang@samsung.com>
> ---
> Changes for v2:
> - add ret_sd for sd card initialization errors
> - return bit OR of ret and ret_sd values
> 
> Changes for v3:
> - change puts() to error() when prints error message
> - chance BIT OR on ret and sd_ret to BIT AND
> 
> Now return value is 0 if any card will init succeed and -1 if both fails.
> 
> ---
>  board/samsung/goni/goni.c |   33 +++++++++++++++++++++++++++++++--
>  1 file changed, 31 insertions(+), 2 deletions(-)
> 
> diff --git a/board/samsung/goni/goni.c b/board/samsung/goni/goni.c
> index 5b3d6ef..366f648 100644
> --- a/board/samsung/goni/goni.c
> +++ b/board/samsung/goni/goni.c
> @@ -72,7 +72,7 @@ int checkboard(void)
>  #ifdef CONFIG_GENERIC_MMC
>  int board_mmc_init(bd_t *bis)
>  {
> -	int i;
> +	int i, ret, ret_sd = 0;
>  
>  	/* MASSMEMORY_EN: XMSMDATA7: GPJ2[7] output high */
>  	s5p_gpio_direction_output(&s5pc110_gpio->j2, 7, 1);
> @@ -95,7 +95,36 @@ 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)
> +		error("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);
> +		}
> +
> +		ret_sd = s5p_mmc_init(2, 4);
> +		if (ret_sd)
> +			error("MMC: Failed to init SD card (MMC:2).\n");
> +	}
> +
> +	return ret & ret_sd;
>  }
>  #endif
>  
>