[U-Boot] [PATCH v2 6/6] tegra2: Enable MMC for Seaboard
Simon Glass
sjg at chromium.org
Thu Sep 22 00:40:07 CEST 2011
From: Tom Warren <twarren at nvidia.com>
This adds the required GPIO and pinmux configuration to make eMMC / SD work
on Seaboard.
Signed-off-by: Simon Glass <sjg at chromium.org>
Tested-by: Tom Warren <twarren at nvidia.com>
---
board/nvidia/common/board.c | 13 +------------
board/nvidia/common/board.h | 1 +
board/nvidia/harmony/harmony.c | 26 ++++++++++++++++++++++++++
board/nvidia/seaboard/seaboard.c | 35 ++++++++++++++++++++++++++++++++++-
drivers/mmc/tegra2_mmc.c | 2 +-
5 files changed, 63 insertions(+), 14 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
diff --git a/drivers/mmc/tegra2_mmc.c b/drivers/mmc/tegra2_mmc.c
index a71785c..9e741f2 100644
--- a/drivers/mmc/tegra2_mmc.c
+++ b/drivers/mmc/tegra2_mmc.c
@@ -452,7 +452,7 @@ static int tegra2_mmc_initialize(int dev_index, int bus_width)
mmc->host_caps = MMC_MODE_8BIT;
else
mmc->host_caps = MMC_MODE_4BIT;
- mmc->host_caps |= MMC_MODE_HS_52MHz | MMC_MODE_HS;
+ mmc->host_caps |= MMC_MODE_HS_52MHz | MMC_MODE_HS | MMC_MODE_HC;
/*
* min freq is for card identification, and is the highest
--
1.7.3.1
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