ARM: add USB device support to pcm037

Add OTG device definition and resources to i.MX31 and a pure USB device mode
support to the pcm037 board.

Signed-off-by: Guennadi Liakhovetski <lg@denx.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

3 files changed, 79 insertions, 0 deletions

diff --git a/arch/arm/mach-mx3/devices.c b/arch/arm/mach-mx3/devices.c
index 227a538bb941..f55c9863ea42 100644
--- a/arch/arm/mach-mx3/devices.c
+++ b/arch/arm/mach-mx3/devices.c
@@ -17,6 +17,7 @@
  * Boston, MA  02110-1301, USA.
  */
 
+#include <linux/dma-mapping.h>
 #include <linux/module.h>
 #include <linux/platform_device.h>
 #include <linux/serial.h>
@@ -349,6 +350,32 @@ struct platform_device mx3_fb = {
        },
 };
 
+static struct resource otg_resources[] = {
+        {
+                .start  = OTG_BASE_ADDR,
+                .end    = OTG_BASE_ADDR + 0x1ff,
+                .flags  = IORESOURCE_MEM,
+        }, {
+                .start  = MXC_INT_USB3,
+                .end    = MXC_INT_USB3,
+                .flags  = IORESOURCE_IRQ,
+        },
+};
+
+static u64 otg_dmamask = DMA_BIT_MASK(32);
+
+/* OTG gadget device */
+struct platform_device mxc_otg_udc_device = {
+        .name           = "fsl-usb2-udc",
+        .id             = -1,
+        .dev            = {
+                .dma_mask               = &otg_dmamask,
+                .coherent_dma_mask      = DMA_BIT_MASK(32),
+        },
+        .resource       = otg_resources,
+        .num_resources  = ARRAY_SIZE(otg_resources),
+};
+
 #ifdef CONFIG_ARCH_MX35
 static struct resource mxc_fec_resources[] = {
         {
diff --git a/arch/arm/mach-mx3/devices.h b/arch/arm/mach-mx3/devices.h
index 88c04b296fab..27779c3e93e7 100644
--- a/arch/arm/mach-mx3/devices.h
+++ b/arch/arm/mach-mx3/devices.h
@@ -14,3 +14,4 @@ extern struct platform_device mx3_fb;
 extern struct platform_device mxc_fec_device;
 extern struct platform_device mxcsdhc_device0;
 extern struct platform_device mxcsdhc_device1;
+extern struct platform_device mxc_otg_udc_device;
diff --git a/arch/arm/mach-mx3/pcm037.c b/arch/arm/mach-mx3/pcm037.c
index 5d7e0ca5c133..350cff5cc48a 100644
--- a/arch/arm/mach-mx3/pcm037.c
+++ b/arch/arm/mach-mx3/pcm037.c
@@ -31,6 +31,7 @@
 #include <linux/delay.h>
 #include <linux/spi/spi.h>
 #include <linux/irq.h>
+#include <linux/fsl_devices.h>
 
 #include <mach/hardware.h>
 #include <asm/mach-types.h>
@@ -131,6 +132,54 @@ static struct resource pcm037_flash_resource = {
         .flags  = IORESOURCE_MEM,
 };
 
+static int usbotg_pins[] = {
+        MX31_PIN_USBOTG_DATA0__USBOTG_DATA0,
+        MX31_PIN_USBOTG_DATA1__USBOTG_DATA1,
+        MX31_PIN_USBOTG_DATA2__USBOTG_DATA2,
+        MX31_PIN_USBOTG_DATA3__USBOTG_DATA3,
+        MX31_PIN_USBOTG_DATA4__USBOTG_DATA4,
+        MX31_PIN_USBOTG_DATA5__USBOTG_DATA5,
+        MX31_PIN_USBOTG_DATA6__USBOTG_DATA6,
+        MX31_PIN_USBOTG_DATA7__USBOTG_DATA7,
+        MX31_PIN_USBOTG_CLK__USBOTG_CLK,
+        MX31_PIN_USBOTG_DIR__USBOTG_DIR,
+        MX31_PIN_USBOTG_NXT__USBOTG_NXT,
+        MX31_PIN_USBOTG_STP__USBOTG_STP,
+};
+
+/* USB OTG HS port */
+static int __init gpio_usbotg_hs_activate(void)
+{
+        int ret = mxc_iomux_setup_multiple_pins(usbotg_pins,
+                                        ARRAY_SIZE(usbotg_pins), "usbotg");
+
+        if (ret < 0) {
+                printk(KERN_ERR "Cannot set up OTG pins\n");
+                return ret;
+        }
+
+        mxc_iomux_set_pad(MX31_PIN_USBOTG_DATA0, PAD_CTL_DRV_MAX | PAD_CTL_SRE_FAST);
+        mxc_iomux_set_pad(MX31_PIN_USBOTG_DATA1, PAD_CTL_DRV_MAX | PAD_CTL_SRE_FAST);
+        mxc_iomux_set_pad(MX31_PIN_USBOTG_DATA2, PAD_CTL_DRV_MAX | PAD_CTL_SRE_FAST);
+        mxc_iomux_set_pad(MX31_PIN_USBOTG_DATA3, PAD_CTL_DRV_MAX | PAD_CTL_SRE_FAST);
+        mxc_iomux_set_pad(MX31_PIN_USBOTG_DATA4, PAD_CTL_DRV_MAX | PAD_CTL_SRE_FAST);
+        mxc_iomux_set_pad(MX31_PIN_USBOTG_DATA5, PAD_CTL_DRV_MAX | PAD_CTL_SRE_FAST);
+        mxc_iomux_set_pad(MX31_PIN_USBOTG_DATA6, PAD_CTL_DRV_MAX | PAD_CTL_SRE_FAST);
+        mxc_iomux_set_pad(MX31_PIN_USBOTG_DATA7, PAD_CTL_DRV_MAX | PAD_CTL_SRE_FAST);
+        mxc_iomux_set_pad(MX31_PIN_USBOTG_CLK,   PAD_CTL_DRV_MAX | PAD_CTL_SRE_FAST);
+        mxc_iomux_set_pad(MX31_PIN_USBOTG_DIR,   PAD_CTL_DRV_MAX | PAD_CTL_SRE_FAST);
+        mxc_iomux_set_pad(MX31_PIN_USBOTG_NXT,   PAD_CTL_DRV_MAX | PAD_CTL_SRE_FAST);
+        mxc_iomux_set_pad(MX31_PIN_USBOTG_STP,   PAD_CTL_DRV_MAX | PAD_CTL_SRE_FAST);
+
+        return 0;
+}
+
+/* OTG config */
+static struct fsl_usb2_platform_data usb_pdata = {
+        .operating_mode = FSL_USB2_DR_DEVICE,
+        .phy_mode       = FSL_USB2_PHY_ULPI,
+};
+
 static struct platform_device pcm037_flash = {
         .name   = "physmap-flash",
         .id     = 0,
@@ -345,6 +394,8 @@ static void __init mxc_board_init(void)
         mxc_register_device(&mxcsdhc_device0, &sdhc_pdata);
         mxc_register_device(&mx3_ipu, &mx3_ipu_data);
         mxc_register_device(&mx3_fb, &mx3fb_pdata);
+        if (!gpio_usbotg_hs_activate())
+                mxc_register_device(&mxc_otg_udc_device, &usb_pdata);
 }
 
 static void __init pcm037_timer_init(void)