text: // SPDX-License-Identifier: GPL-2.0
  /*
   * u_hid.h
   *
   * Utility definitions for the hid function
   *
   * Copyright (c) 2014 Samsung Electronics Co., Ltd.
   *		http://www.samsung.com
   *
   * Author: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
   */
  
  #ifndef U_HID_H
  #define U_HID_H
  
  #include <linux/usb/composite.h>
  
  struct f_hid_opts {
  	struct usb_function_instance	func_inst;
  	int				minor;
  	unsigned char			subclass;
  	unsigned char			protocol;
  	unsigned short			report_length;
  	unsigned short			report_desc_length;
  	unsigned char			*report_desc;
  	bool				report_desc_alloc;
  
  	/*
  	 * Protect the data form concurrent access by read/write
  	 * and create symlink/remove symlink.
  	 */
  	 struct mutex			lock;
  	 int				refcnt;
  };
  
  int ghid_setup(struct usb_gadget *g, int count);
  void ghid_cleanup(void);
  
  #endif /* U_HID_H */
  