[U-Boot] [PATCH v2] arm:goni:mmc: Add sd card detection and initialization.

[Przemyslaw Marczak]

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".

Changes in V2:
- Init SD card even if eMMC init fail.

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 c05801d..2bb2507 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 +92,35 @@ 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");
+	}
+
+	/* SD card init is optional so print information when it fails only */
+	return ret;
 }
 #endif
 
-- 
1.7.9.5