Merge tag 'ep93xx-devel-for-3.6' of git://github.com/RyanMallon/linux-ep93xx into next/soc

From Ryan Mallon <rmallon@gmail.com>:

* tag 'ep93xx-devel-for-3.6' of git://github.com/RyanMallon/linux-ep93xx:
  ep93xx: Add IDE support to edb93xx boards
  ep93xx: IDE driver platform support code

Signed-off-by: Arnd Bergmann <arnd@arndb.de>

4 files changed, 124 insertions, 0 deletions

diff --git a/arch/arm/mach-ep93xx/core.c b/arch/arm/mach-ep93xx/core.c
index 4dd07a0e3604..4afe52aaaff3 100644
--- a/arch/arm/mach-ep93xx/core.c
+++ b/arch/arm/mach-ep93xx/core.c
@@ -797,6 +797,102 @@ static struct platform_device ep93xx_wdt_device = {
         .resource       = ep93xx_wdt_resources,
 };
 
+/*************************************************************************
+ * EP93xx IDE
+ *************************************************************************/
+static struct resource ep93xx_ide_resources[] = {
+        DEFINE_RES_MEM(EP93XX_IDE_PHYS_BASE, 0x38),
+        DEFINE_RES_IRQ(IRQ_EP93XX_EXT3),
+};
+
+static struct platform_device ep93xx_ide_device = {
+        .name           = "ep93xx-ide",
+        .id             = -1,
+        .dev            = {
+                .dma_mask               = &ep93xx_ide_device.dev.coherent_dma_mask,
+                .coherent_dma_mask      = DMA_BIT_MASK(32),
+        },
+        .num_resources  = ARRAY_SIZE(ep93xx_ide_resources),
+        .resource       = ep93xx_ide_resources,
+};
+
+void __init ep93xx_register_ide(void)
+{
+        platform_device_register(&ep93xx_ide_device);
+}
+
+int ep93xx_ide_acquire_gpio(struct platform_device *pdev)
+{
+        int err;
+        int i;
+
+        err = gpio_request(EP93XX_GPIO_LINE_EGPIO2, dev_name(&pdev->dev));
+        if (err)
+                return err;
+        err = gpio_request(EP93XX_GPIO_LINE_EGPIO15, dev_name(&pdev->dev));
+        if (err)
+                goto fail_egpio15;
+        for (i = 2; i < 8; i++) {
+                err = gpio_request(EP93XX_GPIO_LINE_E(i), dev_name(&pdev->dev));
+                if (err)
+                        goto fail_gpio_e;
+        }
+        for (i = 4; i < 8; i++) {
+                err = gpio_request(EP93XX_GPIO_LINE_G(i), dev_name(&pdev->dev));
+                if (err)
+                        goto fail_gpio_g;
+        }
+        for (i = 0; i < 8; i++) {
+                err = gpio_request(EP93XX_GPIO_LINE_H(i), dev_name(&pdev->dev));
+                if (err)
+                        goto fail_gpio_h;
+        }
+
+        /* GPIO ports E[7:2], G[7:4] and H used by IDE */
+        ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_EONIDE |
+                                 EP93XX_SYSCON_DEVCFG_GONIDE |
+                                 EP93XX_SYSCON_DEVCFG_HONIDE);
+        return 0;
+
+fail_gpio_h:
+        for (--i; i >= 0; --i)
+                gpio_free(EP93XX_GPIO_LINE_H(i));
+        i = 8;
+fail_gpio_g:
+        for (--i; i >= 4; --i)
+                gpio_free(EP93XX_GPIO_LINE_G(i));
+        i = 8;
+fail_gpio_e:
+        for (--i; i >= 2; --i)
+                gpio_free(EP93XX_GPIO_LINE_E(i));
+        gpio_free(EP93XX_GPIO_LINE_EGPIO15);
+fail_egpio15:
+        gpio_free(EP93XX_GPIO_LINE_EGPIO2);
+        return err;
+}
+EXPORT_SYMBOL(ep93xx_ide_acquire_gpio);
+
+void ep93xx_ide_release_gpio(struct platform_device *pdev)
+{
+        int i;
+
+        for (i = 2; i < 8; i++)
+                gpio_free(EP93XX_GPIO_LINE_E(i));
+        for (i = 4; i < 8; i++)
+                gpio_free(EP93XX_GPIO_LINE_G(i));
+        for (i = 0; i < 8; i++)
+                gpio_free(EP93XX_GPIO_LINE_H(i));
+        gpio_free(EP93XX_GPIO_LINE_EGPIO15);
+        gpio_free(EP93XX_GPIO_LINE_EGPIO2);
+
+
+        /* GPIO ports E[7:2], G[7:4] and H used by GPIO */
+        ep93xx_devcfg_set_bits(EP93XX_SYSCON_DEVCFG_EONIDE |
+                               EP93XX_SYSCON_DEVCFG_GONIDE |
+                               EP93XX_SYSCON_DEVCFG_HONIDE);
+}
+EXPORT_SYMBOL(ep93xx_ide_release_gpio);
+
 void __init ep93xx_init_devices(void)
 {
         /* Disallow access to MaverickCrunch initially */
diff --git a/arch/arm/mach-ep93xx/edb93xx.c b/arch/arm/mach-ep93xx/edb93xx.c
index d74c5cddb98b..9005ea698f1e 100644
--- a/arch/arm/mach-ep93xx/edb93xx.c
+++ b/arch/arm/mach-ep93xx/edb93xx.c
@@ -233,6 +233,29 @@ static void __init edb93xx_register_fb(void)
 }
 
 
+/*************************************************************************
+ * EDB93xx IDE
+ *************************************************************************/
+static int __init edb93xx_has_ide(void)
+{
+        /*
+         * Although EDB9312 and EDB9315 do have IDE capability, they have
+         * INTRQ line wired as pull-up, which makes using IDE interface
+         * problematic.
+         */
+        return machine_is_edb9312() || machine_is_edb9315() ||
+               machine_is_edb9315a();
+}
+
+static void __init edb93xx_register_ide(void)
+{
+        if (!edb93xx_has_ide())
+                return;
+
+        ep93xx_register_ide();
+}
+
+
 static void __init edb93xx_init_machine(void)
 {
         ep93xx_init_devices();
@@ -243,6 +266,7 @@ static void __init edb93xx_init_machine(void)
         edb93xx_register_i2s();
         edb93xx_register_pwm();
         edb93xx_register_fb();
+        edb93xx_register_ide();
 }
 
 
diff --git a/arch/arm/mach-ep93xx/include/mach/platform.h b/arch/arm/mach-ep93xx/include/mach/platform.h
index 1ecb040d98bf..33a5122c6dc8 100644
--- a/arch/arm/mach-ep93xx/include/mach/platform.h
+++ b/arch/arm/mach-ep93xx/include/mach/platform.h
@@ -48,6 +48,9 @@ void ep93xx_register_i2s(void);
 int ep93xx_i2s_acquire(void);
 void ep93xx_i2s_release(void);
 void ep93xx_register_ac97(void);
+void ep93xx_register_ide(void);
+int ep93xx_ide_acquire_gpio(struct platform_device *pdev);
+void ep93xx_ide_release_gpio(struct platform_device *pdev);
 
 void ep93xx_init_devices(void);
 extern struct sys_timer ep93xx_timer;
diff --git a/arch/arm/mach-ep93xx/soc.h b/arch/arm/mach-ep93xx/soc.h
index 979fba722926..7bf7ff8beae7 100644
--- a/arch/arm/mach-ep93xx/soc.h
+++ b/arch/arm/mach-ep93xx/soc.h
@@ -69,6 +69,7 @@
 
 #define EP93XX_BOOT_ROM_BASE            EP93XX_AHB_IOMEM(0x00090000)
 
+#define EP93XX_IDE_PHYS_BASE            EP93XX_AHB_PHYS(0x000a0000)
 #define EP93XX_IDE_BASE                 EP93XX_AHB_IOMEM(0x000a0000)
 
 #define EP93XX_VIC1_BASE                EP93XX_AHB_IOMEM(0x000b0000)