tegra2: Enable MMC for Seaboard

This adds the required GPIO and pinmux configuration to make eMMC / SD work
on Seaboard.

Signed-off-by: Simon Glass <sjg@chromium.org>
Tested-by: Tom Warren <twarren@nvidia.com>

4 files changed, 62 insertions, 13 deletions

diff --git a/board/nvidia/common/board.c b/board/nvidia/common/board.c
index 5ba7bda..d13537d 100644
--- a/board/nvidia/common/board.c
+++ b/board/nvidia/common/board.c
@@ -160,6 +160,7 @@ int board_mmc_init(bd_t *bd)
 	/* Enable clocks, muxes, etc. for SDMMC controllers */
 	clock_init_mmc();
 	pin_mux_mmc();
+	gpio_config_mmc();
 
 	debug("board_mmc_init: init eMMC\n");
 	/* init dev 0, eMMC chip, with 4-bit bus */
@@ -171,18 +172,6 @@ int board_mmc_init(bd_t *bd)
 
 	return 0;
 }
-
-/* this is a weak define that we are overriding */
-int board_mmc_getcd(u8 *cd, struct mmc *mmc)
-{
-	debug("board_mmc_getcd called\n");
-	/*
-	 * Hard-code CD presence for now. Need to add GPIO inputs
-	 * for Seaboard & Harmony (& Kaen/Aebl/Wario?)
-	 */
-	*cd = 1;
-	return 0;
-}
 #endif
 
 #ifdef CONFIG_BOARD_EARLY_INIT_F
diff --git a/board/nvidia/common/board.h b/board/nvidia/common/board.h
index d649eb7..344e702 100644
--- a/board/nvidia/common/board.h
+++ b/board/nvidia/common/board.h
@@ -26,6 +26,7 @@
 
 void tegra2_start(void);
 void gpio_config_uart(void);
+void gpio_config_mmc(void);
 int tegra2_mmc_init(int dev_index, int bus_width);
 
 #endif	/* BOARD_H */
diff --git a/board/nvidia/harmony/harmony.c b/board/nvidia/harmony/harmony.c
index f1ab050..cbb30d6 100644
--- a/board/nvidia/harmony/harmony.c
+++ b/board/nvidia/harmony/harmony.c
@@ -24,6 +24,9 @@
 #include <common.h>
 #include <asm/io.h>
 #include <asm/arch/tegra2.h>
+#ifdef CONFIG_TEGRA2_MMC
+#include <mmc.h>
+#endif
 
 /*
  * Routine: gpio_config_uart
@@ -32,3 +35,26 @@
 void gpio_config_uart(void)
 {
 }
+
+#ifdef CONFIG_TEGRA2_MMC
+/*
+ * Routine: gpio_config_mmc
+ * Description: Set GPIOs for SD card
+ */
+void gpio_config_mmc(void)
+{
+	/* Not implemented for now */
+}
+
+/* this is a weak define that we are overriding */
+int board_mmc_getcd(u8 *cd, struct mmc *mmc)
+{
+	debug("board_mmc_getcd called\n");
+	/*
+	 * Hard-code CD presence for now. Need to add GPIO inputs
+	 * for Harmony
+	 */
+	*cd = 1;
+	return 0;
+}
+#endif
diff --git a/board/nvidia/seaboard/seaboard.c b/board/nvidia/seaboard/seaboard.c
index 4b9a8f3..bc67d0f 100644
--- a/board/nvidia/seaboard/seaboard.c
+++ b/board/nvidia/seaboard/seaboard.c
@@ -24,7 +24,10 @@
 #include <common.h>
 #include <asm/io.h>
 #include <asm/arch/tegra2.h>
-#include <asm/arch/gpio.h>
+#include <asm/gpio.h>
+#ifdef CONFIG_TEGRA2_MMC
+#include <mmc.h>
+#endif
 
 /*
  * Routine: gpio_config_uart
@@ -50,3 +53,33 @@ void gpio_config_uart(void)
 	val |= 1 << GPIO_BIT(gp);
 	writel(val, &bank->gpio_dir_out[GPIO_PORT(gp)]);
 }
+
+#ifdef CONFIG_TEGRA2_MMC
+/*
+ * Routine: gpio_config_mmc
+ * Description: Set GPIOs for SDMMC3 SDIO slot.
+ */
+void gpio_config_mmc(void)
+{
+	/* Set EN_VDDIO_SD (GPIO I6) */
+	gpio_direction_output(GPIO_PI6, 1);
+
+	/* Config pin as GPI for Card Detect (GPIO I5) */
+	gpio_direction_input(GPIO_PI5);
+}
+
+/* this is a weak define that we are overriding */
+int board_mmc_getcd(u8 *cd, struct mmc *mmc)
+{
+	debug("board_mmc_getcd called\n");
+	*cd = 1;			/* Assume card is inserted, or eMMC */
+
+	if (IS_SD(mmc)) {
+		/* Seaboard SDMMC3 = SDIO3_CD = GPIO_PI5 */
+		if (gpio_get_value(GPIO_PI5))
+			*cd = 0;
+	}
+
+	return 0;
+}
+#endif