diff --git a/board/samsung/common/board.c b/board/samsung/common/board.c
index 20dd75c..1a4e8c9 100644
--- a/board/samsung/common/board.c
+++ b/board/samsung/common/board.c
@@ -24,8 +24,9 @@
 #include <asm/arch/sromc.h>
 #include <lcd.h>
 #include <i2c.h>
-#include <samsung/misc.h>
 #include <usb.h>
+#include <dwc3-uboot.h>
+#include <samsung/misc.h>
 
 DECLARE_GLOBAL_DATA_PTR;
 
@@ -378,5 +379,8 @@
 
 int board_usb_cleanup(int index, enum usb_init_type init)
 {
+#ifdef CONFIG_USB_DWC3
+	dwc3_uboot_exit(index);
+#endif
 	return 0;
 }
diff --git a/board/samsung/smdk5420/smdk5420.c b/board/samsung/smdk5420/smdk5420.c
index 82f607b..8021f77 100644
--- a/board/samsung/smdk5420/smdk5420.c
+++ b/board/samsung/smdk5420/smdk5420.c
@@ -6,19 +6,24 @@
 
 #include <common.h>
 #include <fdtdec.h>
-#include <asm/io.h>
-#include <i2c.h>
-#include <lcd.h>
-#include <parade.h>
-#include <spi.h>
 #include <errno.h>
+#include <asm/io.h>
 #include <asm/gpio.h>
-#include <asm/arch/board.h>
 #include <asm/arch/cpu.h>
-#include <asm/arch/pinmux.h>
+#include <asm/arch/board.h>
+#include <asm/arch/power.h>
 #include <asm/arch/system.h>
+#include <asm/arch/pinmux.h>
 #include <asm/arch/dp_info.h>
+#include <asm/arch/xhci-exynos.h>
 #include <power/tps65090_pmic.h>
+#include <i2c.h>
+#include <lcd.h>
+#include <parade.h>
+#include <spi.h>
+#include <usb.h>
+#include <dwc3-uboot.h>
+#include <samsung-usb-phy-uboot.h>
 
 DECLARE_GLOBAL_DATA_PTR;
 
@@ -75,3 +80,34 @@
 {
 	return 0;
 }
+
+#ifdef CONFIG_USB_DWC3
+static struct dwc3_device dwc3_device_data = {
+	.maximum_speed = USB_SPEED_SUPER,
+	.base = 0x12400000,
+	.dr_mode = USB_DR_MODE_PERIPHERAL,
+	.index = 0,
+};
+
+int usb_gadget_handle_interrupts(void)
+{
+	dwc3_uboot_handle_interrupt(0);
+	return 0;
+}
+
+int board_usb_init(int index, enum usb_init_type init)
+{
+	struct exynos_usb3_phy *phy = (struct exynos_usb3_phy *)
+		samsung_get_base_usb3_phy();
+
+	if (!phy) {
+		error("usb3 phy not supported");
+		return -ENODEV;
+	}
+
+	set_usbdrd_phy_ctrl(POWER_USB_DRD_PHY_CTRL_EN);
+	exynos5_usb3_phy_init(phy);
+
+	return dwc3_uboot_init(&dwc3_device_data);
+}
+#endif