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

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

diff --git a/arch/arm/mach-pxa/littleton.c b/arch/arm/mach-pxa/littleton.c
index 94a32321ad43ff3a134dd35dbe3d0f9637a6828b..55b3788fd1ae9c8aa4cc8ec8d47e9ab1ad48a8e6 100644 (file)
--- a/arch/arm/mach-pxa/littleton.c
+++ b/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();