diff --git a/drivers/usb/mtu3/mtu3_dr.h b/drivers/usb/mtu3/mtu3_dr.h
new file mode 100644
index 0000000..07066f4
--- /dev/null
+++ b/drivers/usb/mtu3/mtu3_dr.h
@@ -0,0 +1,85 @@
+/*
+ * mtu3_dr.h - dual role switch and host glue layer header
+ *
+ * Copyright (C) 2016 MediaTek Inc.
+ *
+ * Author: Chunfeng Yun <chunfeng.yun@mediatek.com>
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#ifndef _MTU3_DR_H_
+#define _MTU3_DR_H_
+
+#if IS_ENABLED(CONFIG_USB_MTU3_HOST)
+
+int ssusb_host_init(struct ssusb_mtk *ssusb, struct device_node *parent_dn);
+void ssusb_host_exit(struct ssusb_mtk *ssusb);
+int ssusb_wakeup_of_property_parse(struct ssusb_mtk *ssusb,
+				struct device_node *dn);
+int ssusb_host_enable(struct ssusb_mtk *ssusb);
+int ssusb_host_disable(struct ssusb_mtk *ssusb, bool suspend);
+int ssusb_wakeup_enable(struct ssusb_mtk *ssusb);
+void ssusb_wakeup_disable(struct ssusb_mtk *ssusb);
+
+#else
+
+static inline int ssusb_host_init(struct ssusb_mtk *ssusb,
+
+	struct device_node *parent_dn)
+{
+	return 0;
+}
+
+static inline void ssusb_host_exit(struct ssusb_mtk *ssusb)
+{}
+
+static inline int ssusb_wakeup_of_property_parse(
+	struct ssusb_mtk *ssusb, struct device_node *dn)
+{
+	return 0;
+}
+
+static inline int ssusb_host_enable(struct ssusb_mtk *ssusb)
+{
+	return 0;
+}
+
+static inline int ssusb_host_disable(struct ssusb_mtk *ssusb, bool suspend)
+{
+	return 0;
+}
+
+static inline int ssusb_wakeup_enable(struct ssusb_mtk *ssusb)
+{
+	return 0;
+}
+
+static inline void ssusb_wakeup_disable(struct ssusb_mtk *ssusb)
+{}
+
+#endif
+
+
+#if IS_ENABLED(CONFIG_USB_MTU3_GADGET)
+int ssusb_gadget_init(struct ssusb_mtk *ssusb);
+void ssusb_gadget_exit(struct ssusb_mtk *ssusb);
+#else
+static inline int ssusb_gadget_init(struct ssusb_mtk *ssusb)
+{
+	return 0;
+}
+
+static inline void ssusb_gadget_exit(struct ssusb_mtk *ssusb)
+{}
+#endif
+
+#endif		/* _MTU3_DR_H_ */