[U-Boot] [PATCH v3 2/6] mx25pdk: Add esdhc support

[Fabio Estevam]

mx25pdk has a SD/MMC slot connected to esdhc1.

Add support for it and allow the environment variables to be saved into SD/MMC.

Signed-off-by: Fabio Estevam <fabio.estevam at freescale.com>
---
Changes since v2:
- No changes
Changes since v1:
- Use "esdhc_cfg[0].sdhc_clk"

 board/freescale/mx25pdk/mx25pdk.c |   53 +++++++++++++++++++++++++++++++++++++
 include/configs/mx25pdk.h         |   16 ++++++++++-
 2 files changed, 68 insertions(+), 1 deletion(-)

diff --git a/board/freescale/mx25pdk/mx25pdk.c b/board/freescale/mx25pdk/mx25pdk.c
index 4a8352f..5f7c982 100644
--- a/board/freescale/mx25pdk/mx25pdk.c
+++ b/board/freescale/mx25pdk/mx25pdk.c
@@ -19,12 +19,24 @@
 
 #include <common.h>
 #include <asm/io.h>
+#include <asm/gpio.h>
 #include <asm/arch/imx-regs.h>
 #include <asm/arch/imx25-pinmux.h>
 #include <asm/arch/sys_proto.h>
+#include <asm/arch/clock.h>
+#include <mmc.h>
+#include <fsl_esdhc.h>
+
+#define CARD_DETECT		IMX_GPIO_NR(2, 1)
 
 DECLARE_GLOBAL_DATA_PTR;
 
+#ifdef CONFIG_FSL_ESDHC
+struct fsl_esdhc_cfg esdhc_cfg[1] = {
+	{IMX_MMC_SDHC1_BASE},
+};
+#endif
+
 int dram_init(void)
 {
 	/* dram_init must store complete ramsize in gd->ram_size */
@@ -48,6 +60,47 @@ int board_init(void)
 	return 0;
 }
 
+#ifdef CONFIG_FSL_ESDHC
+int board_mmc_getcd(struct mmc *mmc)
+{
+	struct iomuxc_mux_ctl *muxctl;
+	struct iomuxc_pad_ctl *padctl;
+	u32 gpio_mux_mode = MX25_PIN_MUX_MODE(5);
+
+	/*
+	 * Set up the Card Detect pin.
+	 *
+	 * SD1_GPIO_CD: gpio2_1 is ALT 5 mode of pin A15
+	 *
+	 */
+	muxctl = (struct iomuxc_mux_ctl *)IMX_IOPADMUX_BASE;
+	padctl = (struct iomuxc_pad_ctl *)IMX_IOPADCTL_BASE;
+
+	writel(gpio_mux_mode, &muxctl->pad_a15);
+	writel(0x0, &padctl->pad_a15);
+
+	gpio_direction_input(CARD_DETECT);
+	return !gpio_get_value(CARD_DETECT);
+}
+
+int board_mmc_init(bd_t *bis)
+{
+	struct iomuxc_mux_ctl *muxctl;
+	u32 sdhc1_mux_mode = MX25_PIN_MUX_MODE(0) | MX25_PIN_MUX_SION;
+
+	muxctl = (struct iomuxc_mux_ctl *)IMX_IOPADMUX_BASE;
+	writel(sdhc1_mux_mode, &muxctl->pad_sd1_cmd);
+	writel(sdhc1_mux_mode, &muxctl->pad_sd1_clk);
+	writel(sdhc1_mux_mode, &muxctl->pad_sd1_data0);
+	writel(sdhc1_mux_mode, &muxctl->pad_sd1_data1);
+	writel(sdhc1_mux_mode, &muxctl->pad_sd1_data2);
+	writel(sdhc1_mux_mode, &muxctl->pad_sd1_data3);
+
+	esdhc_cfg[0].sdhc_clk = mxc_get_clock(MXC_ESDHC1_CLK);
+	return fsl_esdhc_initialize(bis, &esdhc_cfg[0]);
+}
+#endif
+
 int checkboard(void)
 {
 	puts("Board: MX25PDK\n");
diff --git a/include/configs/mx25pdk.h b/include/configs/mx25pdk.h
index 2087502..1770521 100644
--- a/include/configs/mx25pdk.h
+++ b/include/configs/mx25pdk.h
@@ -20,6 +20,7 @@
 #define CONFIG_MX25
 #define CONFIG_SYS_HZ			1000
 #define CONFIG_SYS_TEXT_BASE		0x81200000
+#define CONFIG_MXC_GPIO
 
 #define CONFIG_DISPLAY_CPUINFO
 #define CONFIG_DISPLAY_BOARDINFO
@@ -58,9 +59,10 @@
 /* No NOR flash present */
 #define CONFIG_ENV_OFFSET      (6 * 64 * 1024)
 #define CONFIG_ENV_SIZE        (8 * 1024)
-#define CONFIG_ENV_IS_NOWHERE
 
 #define CONFIG_SYS_NO_FLASH
+#define CONFIG_ENV_IS_IN_MMC
+#define CONFIG_SYS_MMC_ENV_DEV 0
 
 /* U-Boot general configuration */
 #define CONFIG_SYS_PROMPT	"MX25PDK U-Boot > "
@@ -78,6 +80,9 @@
 /* U-Boot commands */
 #include <config_cmd_default.h>
 #define CONFIG_CMD_CACHE
+#define CONFIG_CMD_MMC
+#define CONFIG_CMD_EXT2
+#define CONFIG_CMD_FAT
 
 /* Ethernet */
 #define CONFIG_FEC_MXC
@@ -86,6 +91,15 @@
 #define CONFIG_CMD_NET
 #define CONFIG_ENV_OVERWRITE
 
+/* ESDHC driver */
+#define CONFIG_MMC
+#define CONFIG_GENERIC_MMC
+#define CONFIG_FSL_ESDHC
+#define CONFIG_SYS_FSL_ESDHC_ADDR	0
+#define CONFIG_SYS_FSL_ESDHC_NUM	1
+
+#define CONFIG_DOS_PARTITION
+
 #define CONFIG_BOOTDELAY	3
 
 #define CONFIG_LOADADDR		0x81000000	/* loadaddr env var */
-- 
1.7.9.5