#ifndef __LINUX_UVCVIDEO_H_
  #define __LINUX_UVCVIDEO_H_
  
  #include <linux/ioctl.h>
  #include <linux/types.h>
  
  /*
   * Dynamic controls
   */
  
  /* Data types for UVC control data */
  #define UVC_CTRL_DATA_TYPE_RAW		0
  #define UVC_CTRL_DATA_TYPE_SIGNED	1
  #define UVC_CTRL_DATA_TYPE_UNSIGNED	2
  #define UVC_CTRL_DATA_TYPE_BOOLEAN	3
  #define UVC_CTRL_DATA_TYPE_ENUM		4
  #define UVC_CTRL_DATA_TYPE_BITMASK	5
  
  /* Control flags */
  #define UVC_CTRL_FLAG_SET_CUR		(1 << 0)
  #define UVC_CTRL_FLAG_GET_CUR		(1 << 1)
  #define UVC_CTRL_FLAG_GET_MIN		(1 << 2)
  #define UVC_CTRL_FLAG_GET_MAX		(1 << 3)
  #define UVC_CTRL_FLAG_GET_RES		(1 << 4)
  #define UVC_CTRL_FLAG_GET_DEF		(1 << 5)
  /* Control should be saved at suspend and restored at resume. */
  #define UVC_CTRL_FLAG_RESTORE		(1 << 6)
  /* Control can be updated by the camera. */
  #define UVC_CTRL_FLAG_AUTO_UPDATE	(1 << 7)
  
  #define UVC_CTRL_FLAG_GET_RANGE \
  	(UVC_CTRL_FLAG_GET_CUR | UVC_CTRL_FLAG_GET_MIN | \
  	 UVC_CTRL_FLAG_GET_MAX | UVC_CTRL_FLAG_GET_RES | \
  	 UVC_CTRL_FLAG_GET_DEF)
  
  struct uvc_menu_info {
  	__u32 value;
  	__u8 name[32];
  };
  
  struct uvc_xu_control_mapping {
  	__u32 id;
  	__u8 name[32];
  	__u8 entity[16];
  	__u8 selector;
  
  	__u8 size;
  	__u8 offset;
  	__u32 v4l2_type;
  	__u32 data_type;
  
  	struct uvc_menu_info __user *menu_info;
  	__u32 menu_count;
  
  	__u32 reserved[4];
  };
  
  struct uvc_xu_control_query {
  	__u8 unit;
  	__u8 selector;

  	__u8 query;		/* Video Class-Specific Request Code, */
  				/* defined in linux/usb/video.h A.8.  */

  	__u16 size;
  	__u8 __user *data;
  };
  
  #define UVCIOC_CTRL_MAP		_IOWR('u', 0x20, struct uvc_xu_control_mapping)
  #define UVCIOC_CTRL_QUERY	_IOWR('u', 0x21, struct uvc_xu_control_query)
  
  #endif