ARM: imx/mx27_3ds: Add USB OTG support

Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

diff --git a/arch/arm/mach-imx/Kconfig b/arch/arm/mach-imx/Kconfig
index fed3ee5..9a715ce 100644 (file)
--- a/arch/arm/mach-imx/Kconfig
+++ b/arch/arm/mach-imx/Kconfig
@@ -235,10 +235,13 @@ endchoice
 config MACH_MX27_3DS
        bool "MX27PDK platform"
        select SOC_IMX27
+       select IMX_HAVE_PLATFORM_FSL_USB2_UDC
        select IMX_HAVE_PLATFORM_IMX2_WDT
        select IMX_HAVE_PLATFORM_IMX_KEYPAD
        select IMX_HAVE_PLATFORM_IMX_UART
+       select IMX_HAVE_PLATFORM_MXC_EHCI
        select IMX_HAVE_PLATFORM_MXC_MMC
+       select MXC_ULPI if USB_ULPI
        help
          Include support for MX27PDK platform. This includes specific
          configurations for the board and its peripherals.

diff --git a/arch/arm/mach-imx/mach-mx27_3ds.c b/arch/arm/mach-imx/mach-mx27_3ds.c
index 1a7e879..0ee7a73 100644 (file)
--- a/arch/arm/mach-imx/mach-mx27_3ds.c
+++ b/arch/arm/mach-imx/mach-mx27_3ds.c
@@ -23,16 +23,22 @@
 #include <linux/platform_device.h>
 #include <linux/gpio.h>
 #include <linux/irq.h>
+#include <linux/usb/otg.h>
+#include <linux/usb/ulpi.h>
+#include <linux/delay.h>
+
 #include <asm/mach-types.h>
 #include <asm/mach/arch.h>
 #include <asm/mach/time.h>
 #include <mach/hardware.h>
 #include <mach/common.h>
 #include <mach/iomux-mx27.h>
+#include <mach/ulpi.h>
 
 #include "devices-imx27.h"
 
 #define SD1_EN_GPIO (GPIO_PORTB + 25)
+#define OTG_PHY_RESET_GPIO (GPIO_PORTB + 23)
 
 static const int mx27pdk_pins[] __initconst = {
        /* UART1 */
@@ -67,6 +73,20 @@ static const int mx27pdk_pins[] __initconst = {
        PE22_PF_SD1_CMD,
        PE23_PF_SD1_CLK,
        SD1_EN_GPIO | GPIO_GPIO | GPIO_OUT,
+       /* OTG */
+       OTG_PHY_RESET_GPIO | GPIO_GPIO | GPIO_OUT,
+       PC7_PF_USBOTG_DATA5,
+       PC8_PF_USBOTG_DATA6,
+       PC9_PF_USBOTG_DATA0,
+       PC10_PF_USBOTG_DATA2,
+       PC11_PF_USBOTG_DATA1,
+       PC12_PF_USBOTG_DATA4,
+       PC13_PF_USBOTG_DATA3,
+       PE0_PF_USBOTG_NXT,
+       PE1_PF_USBOTG_STP,
+       PE2_PF_USBOTG_DIR,
+       PE24_PF_USBOTG_CLK,
+       PE25_PF_USBOTG_DATA7,
 };
 
 static const struct imxuart_platform_data uart_pdata __initconst = {
@@ -118,6 +138,45 @@ static void mx27_3ds_sdhc1_enable_level_translator(void)
        gpio_direction_output(SD1_EN_GPIO, 1);
 }
 
+
+static int otg_phy_init(void)
+{
+       gpio_request(OTG_PHY_RESET_GPIO, "usb-otg-reset");
+       gpio_direction_output(OTG_PHY_RESET_GPIO, 0);
+       mdelay(1);
+       gpio_set_value(OTG_PHY_RESET_GPIO, 1);
+       return 0;
+}
+
+#if defined(CONFIG_USB_ULPI)
+
+static struct mxc_usbh_platform_data otg_pdata __initdata = {
+       .portsc = MXC_EHCI_MODE_ULPI,
+       .flags  = MXC_EHCI_INTERFACE_DIFF_UNI,
+};
+#endif
+
+static const struct fsl_usb2_platform_data otg_device_pdata __initconst = {
+       .operating_mode = FSL_USB2_DR_DEVICE,
+       .phy_mode       = FSL_USB2_PHY_ULPI,
+};
+
+static int otg_mode_host;
+
+static int __init mx27_3ds_otg_mode(char *options)
+{
+       if (!strcmp(options, "host"))
+               otg_mode_host = 1;
+       else if (!strcmp(options, "device"))
+               otg_mode_host = 0;
+       else
+               pr_info("otg_mode neither \"host\" nor \"device\". "
+                       "Defaulting to device\n");
+       return 0;
+}
+__setup("otg_mode=", mx27_3ds_otg_mode);
+
+
 static void __init mx27pdk_init(void)
 {
        mxc_gpio_setup_multiple_pins(mx27pdk_pins, ARRAY_SIZE(mx27pdk_pins),
@@ -128,6 +187,18 @@ static void __init mx27pdk_init(void)
        imx27_add_imx_keypad(&mx27_3ds_keymap_data);
        imx27_add_mxc_mmc(0, &sdhc1_pdata);
        imx27_add_imx2_wdt(NULL);
+       otg_phy_init();
+#if defined(CONFIG_USB_ULPI)
+       if (otg_mode_host) {
+               otg_pdata.otg = otg_ulpi_create(&mxc_ulpi_access_ops,
+                               ULPI_OTG_DRVVBUS | ULPI_OTG_DRVVBUS_EXT);
+
+               imx27_add_mxc_ehci_otg(&otg_pdata);
+       }
+#endif
+       if (!otg_mode_host)
+               imx27_add_fsl_usb2_udc(&otg_device_pdata);
+
 }
 
 static void __init mx27pdk_timer_init(void)