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

Przemyslaw Marczak
2013-08-20T10:53:11Z

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".

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>
---
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;
+ }
+
+ /*
+ * 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

--
1.7.9.5