mx31moboard: add support for usb OTG device (v3)

This is used on all board of our system, so again this is done in the
mx31moboard.c file.

changes since v2: call to gpio_request added in platform code, and
moved device initialization in baseboard files.

changes since v1: pins are claimed in another patch

Signed-off-by: Valentin Longchamp <valentin.longchamp@epfl.ch>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

1 files changed, 43 insertions, 0 deletions

diff --git a/arch/arm/mach-mx3/mx31moboard-devboard.c b/arch/arm/mach-mx3/mx31moboard-devboard.c
index b3e8f251ac79..4704405165a1 100644
--- a/arch/arm/mach-mx3/mx31moboard-devboard.c
+++ b/arch/arm/mach-mx3/mx31moboard-devboard.c
@@ -16,6 +16,7 @@
  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  */
 
+#include <linux/fsl_devices.h>
 #include <linux/gpio.h>
 #include <linux/init.h>
 #include <linux/interrupt.h>
@@ -39,6 +40,18 @@ static unsigned int devboard_pins[] = {
         MX31_PIN_PC_READY__SD2_DATA1, MX31_PIN_PC_WAIT_B__SD2_DATA0,
         MX31_PIN_PC_CD2_B__SD2_CLK, MX31_PIN_PC_CD1_B__SD2_CMD,
         MX31_PIN_ATA_DIOR__GPIO3_28, MX31_PIN_ATA_DIOW__GPIO3_29,
+        /* USB OTG */
+        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,
+        MX31_PIN_USB_OC__GPIO1_30,
 };
 
 static struct imxuart_platform_data uart_pdata = {
@@ -98,6 +111,33 @@ static struct imxmmc_platform_data sdhc2_pdata = {
         .exit   = devboard_sdhc2_exit,
 };
 
+static struct fsl_usb2_platform_data usb_pdata = {
+        .operating_mode = FSL_USB2_DR_DEVICE,
+        .phy_mode       = FSL_USB2_PHY_ULPI,
+};
+
+#define OTG_PAD_CFG (PAD_CTL_DRV_MAX | PAD_CTL_SRE_FAST)
+#define OTG_EN_B IOMUX_TO_GPIO(MX31_PIN_USB_OC)
+
+static void devboard_usbotg_init(void)
+{
+        mxc_iomux_set_pad(MX31_PIN_USBOTG_DATA0, OTG_PAD_CFG);
+        mxc_iomux_set_pad(MX31_PIN_USBOTG_DATA1, OTG_PAD_CFG);
+        mxc_iomux_set_pad(MX31_PIN_USBOTG_DATA2, OTG_PAD_CFG);
+        mxc_iomux_set_pad(MX31_PIN_USBOTG_DATA3, OTG_PAD_CFG);
+        mxc_iomux_set_pad(MX31_PIN_USBOTG_DATA4, OTG_PAD_CFG);
+        mxc_iomux_set_pad(MX31_PIN_USBOTG_DATA5, OTG_PAD_CFG);
+        mxc_iomux_set_pad(MX31_PIN_USBOTG_DATA6, OTG_PAD_CFG);
+        mxc_iomux_set_pad(MX31_PIN_USBOTG_DATA7, OTG_PAD_CFG);
+        mxc_iomux_set_pad(MX31_PIN_USBOTG_CLK, OTG_PAD_CFG);
+        mxc_iomux_set_pad(MX31_PIN_USBOTG_DIR, OTG_PAD_CFG);
+        mxc_iomux_set_pad(MX31_PIN_USBOTG_NXT, OTG_PAD_CFG);
+        mxc_iomux_set_pad(MX31_PIN_USBOTG_STP, OTG_PAD_CFG);
+
+        gpio_request(OTG_EN_B, "usb-udc-en");
+        gpio_direction_output(OTG_EN_B, 0);
+}
+
 /*
  * system init for baseboard usage. Will be called by mx31moboard init.
  */
@@ -111,4 +151,7 @@ void __init mx31moboard_devboard_init(void)
         mxc_register_device(&mxc_uart_device1, &uart_pdata);
 
         mxc_register_device(&mxcsdhc_device1, &sdhc2_pdata);
+
+        devboard_usbotg_init();
+        mxc_register_device(&mxc_otg_udc_device, &usb_pdata);
 }