[U-Boot] [PATCH 2/3] arm:goni:mmc: Add sd card detection and initialization.

[Jaehoon Chung]

On 08/28/2013 04:39 PM, Przemyslaw Marczak wrote:
> Hello Minkyu,
> 
>> 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".
> 
> Could you review this patch, please?
> 
>>
>> 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 |   32 +++++++++++++++++++++++++++++++-
>>   1 file changed, 31 insertions(+), 1 deletion(-)
>>
>> diff --git a/board/samsung/goni/goni.c b/board/samsung/goni/goni.c
>> index c05801d..3b236b4 100644
>> --- a/board/samsung/goni/goni.c
>> +++ b/board/samsung/goni/goni.c
>> @@ -69,6 +69,7 @@ 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);
>> @@ -91,7 +92,36 @@ 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) {
>> +        puts("MMC: Failed to init MMC:0.\n");
>> +        return ret;
>> +    }
When eMMC init is failed, immediately return?
I think that even if eMMC init is failed, there is worth that try to init SD-card.

Best Regards,
Jaehoon Chung
>> +
>> +    /*
>> +     * 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");
>> +    }
>> +
>> +    /* SD card init is optional so print information when it fails only */
>> +    return ret;
>>   }
>>   #endif
>>
>>
> 
>