mx31moboard: OTG host support for smartbot board

The Eyebot robot needs the OTG port in host mode on the smartbot.

Add a new board definition so we can select the usb host/device
mode at boot with the mx31moboard_baseboard boot parameter.
Signed-off-by: Philippe Rétornaz <philippe.retornaz@epfl.ch>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

arch/arm/mach-mx3/mach-mx31moboard.c

@@ -491,7 +491,8 @@ static void __init mxc_board_init(void)
 		mx31moboard_marxbot_init();
 		break;
 	case MX31SMARTBOT:
-		mx31moboard_smartbot_init();
+	case MX31EYEBOT:
+		mx31moboard_smartbot_init(mx31moboard_baseboard);
 		break;
 	default:
 		printk(KERN_ERR "Illegal mx31moboard_baseboard type %d\n",

arch/arm/mach-mx3/mx31moboard-smartbot.c

@@ -25,10 +25,16 @@
 #include <linux/types.h>
 #include <linux/fsl_devices.h>
 
+#include <linux/usb/otg.h>
+#include <linux/usb/ulpi.h>
+
 #include <mach/common.h>
 #include <mach/hardware.h>
 #include <mach/imx-uart.h>
 #include <mach/iomux-mx3.h>
+#include <mach/board-mx31moboard.h>
+#include <mach/mxc_ehci.h>
+#include <mach/ulpi.h>
 
 #include <media/soc_camera.h>
 
@@ -122,6 +128,24 @@ static struct fsl_usb2_platform_data usb_pdata = {
 	.phy_mode	= FSL_USB2_PHY_ULPI,
 };
 
+#if defined(CONFIG_USB_ULPI)
+
+static struct mxc_usbh_platform_data otg_host_pdata = {
+	.portsc = MXC_EHCI_MODE_ULPI | MXC_EHCI_UTMI_8BIT,
+	.flags	= MXC_EHCI_POWER_PINS_ENABLED,
+};
+
+static int __init smartbot_otg_host_init(void)
+{
+	otg_host_pdata.otg = otg_ulpi_create(&mxc_ulpi_access_ops,
+			USB_OTG_DRV_VBUS | USB_OTG_DRV_VBUS_EXT);
+
+	return mxc_register_device(&mxc_otg_host, &otg_host_pdata);
+}
+#else
+static inline int smartbot_otg_host_init(void) { return 0; }
+#endif
+
 #define POWER_EN IOMUX_TO_GPIO(MX31_PIN_DTR_DCE1)
 #define DSPIC_RST_B IOMUX_TO_GPIO(MX31_PIN_DSR_DCE1)
 #define TRSLAT_RST_B IOMUX_TO_GPIO(MX31_PIN_RI_DCE1)
@@ -152,7 +176,7 @@ static void smartbot_resets_init(void)
 /*
  * system init for baseboard usage. Will be called by mx31moboard init.
  */
-void __init mx31moboard_smartbot_init(void)
+void __init mx31moboard_smartbot_init(int board)
 {
 	printk(KERN_INFO "Initializing mx31smartbot peripherals\n");
 
@@ -161,7 +185,18 @@ void __init mx31moboard_smartbot_init(void)
 
 	mxc_register_device(&mxc_uart_device1, &uart_pdata);
 
-	mxc_register_device(&mxc_otg_udc_device, &usb_pdata);
+
+	switch (board) {
+	case MX31SMARTBOT:
+		mxc_register_device(&mxc_otg_udc_device, &usb_pdata);
+		break;
+	case MX31EYEBOT:
+		smartbot_otg_host_init();
+		break;
+	default:
+		printk(KERN_WARNING "Unknown board %d, USB OTG not initialized",
+			board);
+	}
 
 	smartbot_resets_init();
 

arch/arm/plat-mxc/include/mach/board-mx31moboard.h

@@ -26,6 +26,7 @@ enum mx31moboard_boards {
 	MX31DEVBOARD	= 1,
 	MX31MARXBOT	= 2,
 	MX31SMARTBOT	= 3,
+	MX31EYEBOT	= 4,
 };
 
 /*
@@ -35,7 +36,7 @@ enum mx31moboard_boards {
 
 extern void mx31moboard_devboard_init(void);
 extern void mx31moboard_marxbot_init(void);
-extern void mx31moboard_smartbot_init(void);
+extern void mx31moboard_smartbot_init(int board);
 
 #endif