imx:mx6sxsabresd add board level support for usb

Add pinmux settings, implement board_ehci_hcd_init, board_usb_phy_mode

There are two usb port on mx6sxsabresd board:
1. otg port
2. host port
The following are the connection between usb controller and board usb
interface, host port has not ID pin set:
otg1 core <---> board otg port
otg2 core <---> board host port
In order to make host port work, board_usb_phy_mode return USB_INIT_HOST
to make host port work in HOST mode.

Signed-off-by: Peng Fan <Peng.Fan@freescale.com>
Signed-off-by: Ye Li <B37916@freescale.com>

board/freescale/mx6sxsabresd/mx6sxsabresd.c

@@ -25,6 +25,8 @@
 #include <netdev.h>
 #include <power/pmic.h>
 #include <power/pfuze100_pmic.h>
+#include <usb.h>
+#include <usb/ehci-fsl.h>
 
 DECLARE_GLOBAL_DATA_PTR;
 
@@ -252,6 +254,10 @@ int board_early_init_f(void)
 	/* Active high for ncp692 */
 	gpio_direction_output(IMX_GPIO_NR(4, 16) , 1);
 
+#ifdef CONFIG_USB_EHCI_MX6
+	setup_usb();
+#endif
+
 	return 0;
 }
 
@@ -272,6 +278,49 @@ int board_mmc_init(bd_t *bis)
 	return fsl_esdhc_initialize(bis, &usdhc_cfg[0]);
 }
 
+#ifdef CONFIG_USB_EHCI_MX6
+#define USB_OTHERREGS_OFFSET	0x800
+#define UCTRL_PWR_POL		(1 << 9)
+
+static iomux_v3_cfg_t const usb_otg_pads[] = {
+	/* OGT1 */
+	MX6_PAD_GPIO1_IO09__USB_OTG1_PWR | MUX_PAD_CTRL(NO_PAD_CTRL),
+	MX6_PAD_GPIO1_IO10__ANATOP_OTG1_ID | MUX_PAD_CTRL(NO_PAD_CTRL),
+	/* OTG2 */
+	MX6_PAD_GPIO1_IO12__USB_OTG2_PWR | MUX_PAD_CTRL(NO_PAD_CTRL)
+};
+
+static void setup_usb(void)
+{
+	imx_iomux_v3_setup_multiple_pads(usb_otg_pads,
+					 ARRAY_SIZE(usb_otg_pads));
+}
+
+int board_usb_phy_mode(int port)
+{
+	if (port == 1)
+		return USB_INIT_HOST;
+	else
+		return usb_phy_mode(port);
+}
+
+int board_ehci_hcd_init(int port)
+{
+	u32 *usbnc_usb_ctrl;
+
+	if (port > 1)
+		return -EINVAL;
+
+	usbnc_usb_ctrl = (u32 *)(USB_BASE_ADDR + USB_OTHERREGS_OFFSET +
+				 port * 4);
+
+	/* Set Power polarity */
+	setbits_le32(usbnc_usb_ctrl, UCTRL_PWR_POL);
+
+	return 0;
+}
+#endif
+
 int board_init(void)
 {
 	/* Address of boot parameters */

include/configs/mx6sxsabresd.h

@@ -198,6 +198,20 @@
 #define CONFIG_PHYLIB
 #define CONFIG_PHY_ATHEROS
 
+
+#define CONFIG_CMD_USB
+#ifdef CONFIG_CMD_USB
+#define CONFIG_USB_EHCI
+#define CONFIG_USB_EHCI_MX6
+#define CONFIG_USB_STORAGE
+#define CONFIG_EHCI_HCD_INIT_AFTER_RESET
+#define CONFIG_USB_HOST_ETHER
+#define CONFIG_USB_ETHER_ASIX
+#define CONFIG_MXC_USB_PORTSC  (PORT_PTS_UTMI | PORT_PTS_PTW)
+#define CONFIG_MXC_USB_FLAGS   0
+#define CONFIG_USB_MAX_CONTROLLER_COUNT 2
+#endif
+
 #define CONFIG_CMD_PCI
 #ifdef CONFIG_CMD_PCI
 #define CONFIG_PCI