1/*
2 *  User level driver support for input subsystem
3 *
4 * Heavily based on evdev.c by Vojtech Pavlik
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 *
20 * Author: Aristeu Sergio Rozanski Filho <aris@cathedrallabs.org>
21 *
22 * Changes/Revisions:
23 *	0.4	01/09/2014 (Benjamin Tissoires <benjamin.tissoires@redhat.com>)
24 *		- add UI_GET_SYSNAME ioctl
25 *	0.3	24/05/2006 (Anssi Hannula <anssi.hannulagmail.com>)
26 *		- update ff support for the changes in kernel interface
27 *		- add UINPUT_VERSION
28 *	0.2	16/10/2004 (Micah Dowty <micah@navi.cx>)
29 *		- added force feedback support
30 *             - added UI_SET_PHYS
31 *	0.1	20/06/2002
32 *		- first public version
33 */
34#ifndef __UINPUT_H_
35#define __UINPUT_H_
36
37#include <uapi/linux/uinput.h>
38
39#define UINPUT_NAME		"uinput"
40#define UINPUT_BUFFER_SIZE	16
41#define UINPUT_NUM_REQUESTS	16
42
43enum uinput_state { UIST_NEW_DEVICE, UIST_SETUP_COMPLETE, UIST_CREATED };
44
45struct uinput_request {
46	unsigned int		id;
47	unsigned int		code;	/* UI_FF_UPLOAD, UI_FF_ERASE */
48
49	int			retval;
50	struct completion	done;
51
52	union {
53		unsigned int	effect_id;
54		struct {
55			struct ff_effect *effect;
56			struct ff_effect *old;
57		} upload;
58	} u;
59};
60
61struct uinput_device {
62	struct input_dev	*dev;
63	struct mutex		mutex;
64	enum uinput_state	state;
65	wait_queue_head_t	waitq;
66	unsigned char		ready;
67	unsigned char		head;
68	unsigned char		tail;
69	struct input_event	buff[UINPUT_BUFFER_SIZE];
70	unsigned int		ff_effects_max;
71
72	struct uinput_request	*requests[UINPUT_NUM_REQUESTS];
73	wait_queue_head_t	requests_waitq;
74	spinlock_t		requests_lock;
75};
76#endif	/* __UINPUT_H_ */
77