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+/*!
+    \file  usbh_enum.h
+    \brief USB host mode USB enumeration header file
+
+    \version 2019-6-5, V1.0.0, firmware for GD32 USBFS&USBHS
+*/
+
+/*
+    Copyright (c) 2019, GigaDevice Semiconductor Inc.
+
+    Redistribution and use in source and binary forms, with or without modification,
+are permitted provided that the following conditions are met:
+
+    1. Redistributions of source code must retain the above copyright notice, this
+       list of conditions and the following disclaimer.
+    2. Redistributions in binary form must reproduce the above copyright notice,
+       this list of conditions and the following disclaimer in the documentation
+       and/or other materials provided with the distribution.
+    3. Neither the name of the copyright holder nor the names of its contributors
+       may be used to endorse or promote products derived from this software without
+       specific prior written permission.
+
+    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
+INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+OF SUCH DAMAGE.
+*/
+
+#ifndef __USBH_ENUM_H
+#define __USBH_ENUM_H
+
+#include "usb_conf.h"
+#include "usbh_core.h"
+
+/* get the next descriptor header */
+usb_desc_header* usbh_nextdesc_get(uint8_t* pbuf, uint16_t* ptr);
+
+/* configure USB control status parameters */
+void usbh_ctlstate_config(usbh_host* puhost, uint8_t* buf, uint16_t len);
+
+/* get device descriptor from the USB device */
+usbh_status usbh_devdesc_get(usb_core_driver* pudev, usbh_host* puhost, uint8_t len);
+
+/* get configuration descriptor from the USB device */
+usbh_status usbh_cfgdesc_get(usb_core_driver* pudev, usbh_host* puhost, uint16_t len);
+
+/* get string descriptor from the USB device */
+usbh_status usbh_strdesc_get(usb_core_driver* pudev,
+                             usbh_host* puhost,
+                             uint8_t str_index,
+                             uint8_t* buf,
+                             uint16_t len);
+
+/* set the configuration value to the connected device */
+usbh_status usbh_setcfg(usb_core_driver* pudev, usbh_host* puhost, uint16_t config);
+
+/* set the address to the connected device */
+usbh_status usbh_setaddress(usb_core_driver* pudev, usbh_host* puhost, uint8_t dev_addr);
+
+/* clear or disable a specific feature */
+usbh_status usbh_clrfeature(usb_core_driver* pudev,
+                            usbh_host* puhost,
+                            uint8_t ep_num,
+                            uint8_t pp_num);
+
+/* set the interface value to the connected device */
+usbh_status usbh_setinterface(usb_core_driver* pudev,
+                              usbh_host* puhost,
+                              uint8_t ep_num,
+                              uint8_t alter_setting);
+
+#endif /* __USBH_ENUM_H */