[ARM] pxa: mmc: add 1st host controller support for pxa3xx

This patchis to add the first mmc controller support for pxa3xx.
It's valid for pxa3[0|1|2]0.

On zylonite, the first controller supports two slots, this patch
only support the first one right now.

Signed-off-by: Bridge Wu <bridge.wu@marvell.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

1 files changed, 86 insertions, 0 deletions

diff --git a/arch/arm/mach-pxa/zylonite.c b/arch/arm/mach-pxa/zylonite.c
index 743a87b2faa1..f72f37f6ff0c 100644
--- a/arch/arm/mach-pxa/zylonite.c
+++ b/arch/arm/mach-pxa/zylonite.c
@@ -25,9 +25,13 @@
 #include <asm/arch/gpio.h>
 #include <asm/arch/pxafb.h>
 #include <asm/arch/zylonite.h>
+#include <asm/arch/mmc.h>
 
 #include "generic.h"
 
+#define MAX_SLOTS       2
+struct platform_mmc_slot zylonite_mmc_slot[MAX_SLOTS];
+
 int gpio_backlight;
 int gpio_eth_irq;
 
@@ -156,6 +160,87 @@ static void __init zylonite_init_lcd(void)
 static inline void zylonite_init_lcd(void) {}
 #endif
 
+#if defined(CONFIG_MMC)
+static int zylonite_mci_ro(struct device *dev)
+{
+        struct platform_device *pdev = to_platform_device(dev);
+
+        return gpio_get_value(zylonite_mmc_slot[pdev->id].gpio_wp);
+}
+
+static int zylonite_mci_init(struct device *dev,
+                             irq_handler_t zylonite_detect_int,
+                             void *data)
+{
+        struct platform_device *pdev = to_platform_device(dev);
+        int err, cd_irq, gpio_cd, gpio_wp;
+
+        cd_irq = gpio_to_irq(zylonite_mmc_slot[pdev->id].gpio_cd);
+        gpio_cd = zylonite_mmc_slot[pdev->id].gpio_cd;
+        gpio_wp = zylonite_mmc_slot[pdev->id].gpio_wp;
+
+        /*
+         * setup GPIO for Zylonite MMC controller
+         */
+        err = gpio_request(gpio_cd, "mmc card detect");
+        if (err)
+                goto err_request_cd;
+        gpio_direction_input(gpio_cd);
+
+        err = gpio_request(gpio_wp, "mmc write protect");
+        if (err)
+                goto err_request_wp;
+        gpio_direction_input(gpio_wp);
+
+        err = request_irq(cd_irq, zylonite_detect_int,
+                          IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
+                          "MMC card detect", data);
+        if (err) {
+                printk(KERN_ERR "%s: MMC/SD/SDIO: "
+                                "can't request card detect IRQ\n", __func__);
+                goto err_request_irq;
+        }
+
+        return 0;
+
+err_request_irq:
+        gpio_free(gpio_wp);
+err_request_wp:
+        gpio_free(gpio_cd);
+err_request_cd:
+        return err;
+}
+
+static void zylonite_mci_exit(struct device *dev, void *data)
+{
+        struct platform_device *pdev = to_platform_device(dev);
+        int cd_irq, gpio_cd, gpio_wp;
+
+        cd_irq = gpio_to_irq(zylonite_mmc_slot[pdev->id].gpio_cd);
+        gpio_cd = zylonite_mmc_slot[pdev->id].gpio_cd;
+        gpio_wp = zylonite_mmc_slot[pdev->id].gpio_wp;
+
+        free_irq(cd_irq, data);
+        gpio_free(gpio_cd);
+        gpio_free(gpio_wp);
+}
+
+static struct pxamci_platform_data zylonite_mci_platform_data = {
+        .detect_delay   = 20,
+        .ocr_mask       = MMC_VDD_32_33|MMC_VDD_33_34,
+        .init           = zylonite_mci_init,
+        .exit           = zylonite_mci_exit,
+        .get_ro         = zylonite_mci_ro,
+};
+
+static void __init zylonite_init_mmc(void)
+{
+        pxa_set_mci_info(&zylonite_mci_platform_data);
+}
+#else
+static inline void zylonite_init_mmc(void) {}
+#endif
+
 static void __init zylonite_init(void)
 {
         /* board-processor specific initialization */
@@ -171,6 +256,7 @@ static void __init zylonite_init(void)
         platform_device_register(&smc91x_device);
 
         zylonite_init_lcd();
+        zylonite_init_mmc();
 }
 
 MACHINE_START(ZYLONITE, "PXA3xx Platform Development Kit (aka Zylonite)")