[ARM] pxa/littleton: add support for the Micro-SD slot (MMC1)

Signed-off-by: Eric Miao <eric.y.miao@gmail.com>

arch/arm/mach-pxa/littleton.c

@@ -42,6 +42,7 @@
 #include <mach/pxa300.h>
 #include <mach/pxafb.h>
 #include <mach/ssp.h>
+#include <mach/mmc.h>
 #include <mach/pxa2xx_spi.h>
 #include <plat/i2c.h>
 #include <mach/pxa27x_keypad.h>
@@ -50,6 +51,8 @@
 
 #include "generic.h"
 
+#define GPIO_MMC1_CARD_DETECT	mfp_to_gpio(MFP_PIN_GPIO15)
+
 /* Littleton MFP configurations */
 static mfp_cfg_t littleton_mfp_cfg[] __initdata = {
 	/* LCD */
@@ -98,6 +101,15 @@ static mfp_cfg_t littleton_mfp_cfg[] __initdata = {
 	GPIO123_KP_MKOUT_2,
 	GPIO124_KP_MKOUT_3,
 	GPIO125_KP_MKOUT_4,
+
+	/* MMC1 */
+	GPIO3_MMC1_DAT0,
+	GPIO4_MMC1_DAT1,
+	GPIO5_MMC1_DAT2,
+	GPIO6_MMC1_DAT3,
+	GPIO7_MMC1_CLK,
+	GPIO8_MMC1_CMD,
+	GPIO15_GPIO, /* card detect */
 };
 
 static struct resource smc91x_resources[] = {
@@ -252,6 +264,56 @@ static void __init littleton_init_keypad(void)
 static inline void littleton_init_keypad(void) {}
 #endif
 
+#if defined(CONFIG_MMC_PXA) || defined(CONFIG_MMC_PXA_MODULE)
+static int littleton_mci_init(struct device *dev,
+			      irq_handler_t littleton_detect_int, void *data)
+{
+	int err, gpio_cd = GPIO_MMC1_CARD_DETECT;
+
+	err = gpio_request(gpio_cd, "mmc card detect");
+	if (err)
+		goto err_request_cd;
+
+	gpio_direction_input(gpio_cd);
+
+	err = request_irq(gpio_to_irq(gpio_cd), littleton_detect_int,
+			  IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
+			  "mmc card detect", data);
+	if (err) {
+		dev_err(dev, "failed to request card detect IRQ\n");
+		goto err_request_irq;
+	}
+	return 0;
+
+err_request_irq:
+	gpio_free(gpio_cd);
+err_request_cd:
+	return err;
+}
+
+static void littleton_mci_exit(struct device *dev, void *data)
+{
+	int gpio_cd = GPIO_MMC1_CARD_DETECT;
+
+	free_irq(gpio_to_irq(gpio_cd), data);
+	gpio_free(gpio_cd);
+}
+
+static struct pxamci_platform_data littleton_mci_platform_data = {
+	.detect_delay	= 20,
+	.ocr_mask	= MMC_VDD_32_33 | MMC_VDD_33_34,
+	.init 		= littleton_mci_init,
+	.exit		= littleton_mci_exit,
+};
+
+static void __init littleton_init_mmc(void)
+{
+	pxa_set_mci_info(&littleton_mci_platform_data);
+}
+#else
+static inline void littleton_init_mmc(void) {}
+#endif
+
 #if defined(CONFIG_MTD_NAND_PXA3xx) || defined(CONFIG_MTD_NAND_PXA3xx_MODULE)
 static struct mtd_partition littleton_nand_partitions[] = {
 	[0] = {
@@ -392,6 +454,7 @@ static void __init littleton_init(void)
 
 	littleton_init_spi();
 	littleton_init_i2c();
+	littleton_init_mmc();
 	littleton_init_lcd();
 	littleton_init_keypad();
 	littleton_init_nand();