#ifndef __UINPUT_H_
  #define __UINPUT_H_
  /*
   *  User level driver support for input subsystem
   *
   * Heavily based on evdev.c by Vojtech Pavlik
   *
   * This program is free software; you can redistribute it and/or modify
   * it under the terms of the GNU General Public License as published by
   * the Free Software Foundation; either version 2 of the License, or
   * (at your option) any later version.
   *
   * 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.
   *
   * You should have received a copy of the GNU General Public License
   * along with this program; if not, write to the Free Software
   * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
   *
   * Author: Aristeu Sergio Rozanski Filho <aris@cathedrallabs.org>

   *

   * Changes/Revisions:

   *	0.3	24/05/2006 (Anssi Hannula <anssi.hannulagmail.com>)
   *		- update ff support for the changes in kernel interface
   *		- add UINPUT_VERSION

   *	0.2	16/10/2004 (Micah Dowty <micah@navi.cx>)
   *		- added force feedback support
   *             - added UI_SET_PHYS
   *	0.1	20/06/2002
   *		- first public version
   */

  #include <linux/input.h>

  #define UINPUT_VERSION		3

  #ifdef __KERNEL__

  #define UINPUT_NAME		"uinput"
  #define UINPUT_BUFFER_SIZE	16
  #define UINPUT_NUM_REQUESTS	16

  enum uinput_state { UIST_NEW_DEVICE, UIST_SETUP_COMPLETE, UIST_CREATED };

  
  struct uinput_request {
  	int			id;
  	int			code;	/* UI_FF_UPLOAD, UI_FF_ERASE */
  
  	int			retval;

  	struct completion	done;

  
  	union {
  		int		effect_id;

  		struct {
  			struct ff_effect *effect;
  			struct ff_effect *old;
  		} upload;

  	} u;
  };
  
  struct uinput_device {
  	struct input_dev	*dev;

  	struct mutex		mutex;

  	enum uinput_state	state;

  	wait_queue_head_t	waitq;

  	unsigned char		ready;
  	unsigned char		head;
  	unsigned char		tail;

  	struct input_event	buff[UINPUT_BUFFER_SIZE];

  	unsigned int		ff_effects_max;

  
  	struct uinput_request	*requests[UINPUT_NUM_REQUESTS];
  	wait_queue_head_t	requests_waitq;

  	spinlock_t		requests_lock;

  };
  #endif	/* __KERNEL__ */
  
  struct uinput_ff_upload {
  	int			request_id;
  	int			retval;
  	struct ff_effect	effect;

  	struct ff_effect	old;

  };
  
  struct uinput_ff_erase {
  	int			request_id;
  	int			retval;
  	int			effect_id;
  };
  
  /* ioctl */
  #define UINPUT_IOCTL_BASE	'U'
  #define UI_DEV_CREATE		_IO(UINPUT_IOCTL_BASE, 1)
  #define UI_DEV_DESTROY		_IO(UINPUT_IOCTL_BASE, 2)
  
  #define UI_SET_EVBIT		_IOW(UINPUT_IOCTL_BASE, 100, int)
  #define UI_SET_KEYBIT		_IOW(UINPUT_IOCTL_BASE, 101, int)
  #define UI_SET_RELBIT		_IOW(UINPUT_IOCTL_BASE, 102, int)
  #define UI_SET_ABSBIT		_IOW(UINPUT_IOCTL_BASE, 103, int)
  #define UI_SET_MSCBIT		_IOW(UINPUT_IOCTL_BASE, 104, int)
  #define UI_SET_LEDBIT		_IOW(UINPUT_IOCTL_BASE, 105, int)
  #define UI_SET_SNDBIT		_IOW(UINPUT_IOCTL_BASE, 106, int)
  #define UI_SET_FFBIT		_IOW(UINPUT_IOCTL_BASE, 107, int)
  #define UI_SET_PHYS		_IOW(UINPUT_IOCTL_BASE, 108, char*)

  #define UI_SET_SWBIT		_IOW(UINPUT_IOCTL_BASE, 109, int)

  #define UI_SET_PROPBIT		_IOW(UINPUT_IOCTL_BASE, 110, int)

  
  #define UI_BEGIN_FF_UPLOAD	_IOWR(UINPUT_IOCTL_BASE, 200, struct uinput_ff_upload)
  #define UI_END_FF_UPLOAD	_IOW(UINPUT_IOCTL_BASE, 201, struct uinput_ff_upload)
  #define UI_BEGIN_FF_ERASE	_IOWR(UINPUT_IOCTL_BASE, 202, struct uinput_ff_erase)
  #define UI_END_FF_ERASE		_IOW(UINPUT_IOCTL_BASE, 203, struct uinput_ff_erase)

  /*
   * To write a force-feedback-capable driver, the upload_effect

   * and erase_effect callbacks in input_dev must be implemented.
   * The uinput driver will generate a fake input event when one of
   * these callbacks are invoked. The userspace code then uses
   * ioctls to retrieve additional parameters and send the return code.
   * The callback blocks until this return code is sent.
   *

   * The described callback mechanism is only used if ff_effects_max
   * is set.

   *
   * To implement upload_effect():

   *   1. Wait for an event with type == EV_UINPUT and code == UI_FF_UPLOAD.

   *      A request ID will be given in 'value'.
   *   2. Allocate a uinput_ff_upload struct, fill in request_id with
   *      the 'value' from the EV_UINPUT event.
   *   3. Issue a UI_BEGIN_FF_UPLOAD ioctl, giving it the
   *      uinput_ff_upload struct. It will be filled in with the

   *      ff_effects passed to upload_effect().
   *   4. Perform the effect upload, and place a return code back into
          the uinput_ff_upload struct.

   *   5. Issue a UI_END_FF_UPLOAD ioctl, also giving it the
   *      uinput_ff_upload_effect struct. This will complete execution
   *      of our upload_effect() handler.
   *
   * To implement erase_effect():

   *   1. Wait for an event with type == EV_UINPUT and code == UI_FF_ERASE.

   *      A request ID will be given in 'value'.
   *   2. Allocate a uinput_ff_erase struct, fill in request_id with
   *      the 'value' from the EV_UINPUT event.
   *   3. Issue a UI_BEGIN_FF_ERASE ioctl, giving it the
   *      uinput_ff_erase struct. It will be filled in with the
   *      effect ID passed to erase_effect().
   *   4. Perform the effect erasure, and place a return code back
   *      into the uinput_ff_erase struct.

   *   5. Issue a UI_END_FF_ERASE ioctl, also giving it the
   *      uinput_ff_erase_effect struct. This will complete execution
   *      of our erase_effect() handler.
   */

  /*
   * This is the new event type, used only by uinput.

   * 'code' is UI_FF_UPLOAD or UI_FF_ERASE, and 'value'
   * is the unique request ID. This number was picked
   * arbitrarily, above EV_MAX (since the input system
   * never sees it) but in the range of a 16-bit int.
   */
  #define EV_UINPUT		0x0101
  #define UI_FF_UPLOAD		1
  #define UI_FF_ERASE		2

  #define UINPUT_MAX_NAME_SIZE	80
  struct uinput_user_dev {
  	char name[UINPUT_MAX_NAME_SIZE];
  	struct input_id id;

  	int ff_effects_max;
  	int absmax[ABS_CNT];
  	int absmin[ABS_CNT];
  	int absfuzz[ABS_CNT];
  	int absflat[ABS_CNT];

  };
  #endif	/* __UINPUT_H_ */