[linux-2.6-block.git] / include / linux / uinput.h

#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
 */

#define UINPUT_VERSION		3

#ifdef __KERNEL__
#define UINPUT_MINOR		223
#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];
	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_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

#ifndef NBITS
#define NBITS(x) ((((x)-1)/(sizeof(long)*8))+1)
#endif	/* NBITS */

#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_MAX + 1];
        int absmin[ABS_MAX + 1];
        int absfuzz[ABS_MAX + 1];
        int absflat[ABS_MAX + 1];
};
#endif	/* __UINPUT_H_ */
Commit	Line	Data
1da177e4 LT	1	#ifndef __UINPUT_H_
	2	#define __UINPUT_H_
	3	/*
	4	* User level driver support for input subsystem
	5	*
	6	* Heavily based on evdev.c by Vojtech Pavlik
	7	*
	8	* This program is free software; you can redistribute it and/or modify
	9	* it under the terms of the GNU General Public License as published by
	10	* the Free Software Foundation; either version 2 of the License, or
	11	* (at your option) any later version.
	12	*
	13	* This program is distributed in the hope that it will be useful,
	14	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	15	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	16	* GNU General Public License for more details.
	17	*
	18	* You should have received a copy of the GNU General Public License
	19	* along with this program; if not, write to the Free Software
	20	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	21	*
	22	* Author: Aristeu Sergio Rozanski Filho <aris@cathedrallabs.org>
221979aa	23	*
1da177e4	24	* Changes/Revisions:
ff462551 AH	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
1da177e4 LT	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	*/
ff462551 AH	34
	35	#define UINPUT_VERSION 3
	36
1da177e4 LT	37	#ifdef __KERNEL__
	38	#define UINPUT_MINOR 223
	39	#define UINPUT_NAME "uinput"
	40	#define UINPUT_BUFFER_SIZE 16
	41	#define UINPUT_NUM_REQUESTS 16
	42
29506415	43	enum uinput_state { UIST_NEW_DEVICE, UIST_SETUP_COMPLETE, UIST_CREATED };
1da177e4 LT	44
	45	struct uinput_request {
	46	int id;
	47	int code; /* UI_FF_UPLOAD, UI_FF_ERASE */
	48
	49	int retval;
0048e603	50	struct completion done;
1da177e4 LT	51
	52	union {
	53	int effect_id;
ff462551 AH	54	struct {
	55	struct ff_effect *effect;
	56	struct ff_effect *old;
	57	} upload;
1da177e4 LT	58	} u;
	59	};
	60
	61	struct uinput_device {
	62	struct input_dev *dev;
221979aa	63	struct mutex mutex;
29506415	64	enum uinput_state state;
1da177e4	65	wait_queue_head_t waitq;
29506415 DT	66	unsigned char ready;
	67	unsigned char head;
	68	unsigned char tail;
1da177e4	69	struct input_event buff[UINPUT_BUFFER_SIZE];
ff462551	70	int ff_effects_max;
1da177e4 LT	71
	72	struct uinput_request *requests[UINPUT_NUM_REQUESTS];
	73	wait_queue_head_t requests_waitq;
0048e603	74	spinlock_t requests_lock;
1da177e4 LT	75	};
	76	#endif /* __KERNEL__ */
	77
	78	struct uinput_ff_upload {
	79	int request_id;
	80	int retval;
	81	struct ff_effect effect;
ff462551	82	struct ff_effect old;
1da177e4 LT	83	};
	84
	85	struct uinput_ff_erase {
	86	int request_id;
	87	int retval;
	88	int effect_id;
	89	};
	90
	91	/* ioctl */
	92	#define UINPUT_IOCTL_BASE 'U'
	93	#define UI_DEV_CREATE _IO(UINPUT_IOCTL_BASE, 1)
	94	#define UI_DEV_DESTROY _IO(UINPUT_IOCTL_BASE, 2)
	95
	96	#define UI_SET_EVBIT _IOW(UINPUT_IOCTL_BASE, 100, int)
	97	#define UI_SET_KEYBIT _IOW(UINPUT_IOCTL_BASE, 101, int)
	98	#define UI_SET_RELBIT _IOW(UINPUT_IOCTL_BASE, 102, int)
	99	#define UI_SET_ABSBIT _IOW(UINPUT_IOCTL_BASE, 103, int)
	100	#define UI_SET_MSCBIT _IOW(UINPUT_IOCTL_BASE, 104, int)
	101	#define UI_SET_LEDBIT _IOW(UINPUT_IOCTL_BASE, 105, int)
	102	#define UI_SET_SNDBIT _IOW(UINPUT_IOCTL_BASE, 106, int)
	103	#define UI_SET_FFBIT _IOW(UINPUT_IOCTL_BASE, 107, int)
	104	#define UI_SET_PHYS _IOW(UINPUT_IOCTL_BASE, 108, char*)
59c7c037	105	#define UI_SET_SWBIT _IOW(UINPUT_IOCTL_BASE, 109, int)
1da177e4 LT	106
	107	#define UI_BEGIN_FF_UPLOAD _IOWR(UINPUT_IOCTL_BASE, 200, struct uinput_ff_upload)
	108	#define UI_END_FF_UPLOAD _IOW(UINPUT_IOCTL_BASE, 201, struct uinput_ff_upload)
	109	#define UI_BEGIN_FF_ERASE _IOWR(UINPUT_IOCTL_BASE, 202, struct uinput_ff_erase)
	110	#define UI_END_FF_ERASE _IOW(UINPUT_IOCTL_BASE, 203, struct uinput_ff_erase)
	111
ff462551 AH	112	/*
ff462551 AH	113	* To write a force-feedback-capable driver, the upload_effect
1da177e4 LT	114	* and erase_effect callbacks in input_dev must be implemented.
	115	* The uinput driver will generate a fake input event when one of
	116	* these callbacks are invoked. The userspace code then uses
	117	* ioctls to retrieve additional parameters and send the return code.
	118	* The callback blocks until this return code is sent.
	119	*
ff462551 AH	120	* The described callback mechanism is only used if ff_effects_max
ff462551 AH	121	* is set.
1da177e4 LT	122	*
1da177e4 LT	123	* To implement upload_effect():
ff462551	124	* 1. Wait for an event with type == EV_UINPUT and code == UI_FF_UPLOAD.
1da177e4 LT	125	* A request ID will be given in 'value'.
	126	* 2. Allocate a uinput_ff_upload struct, fill in request_id with
	127	* the 'value' from the EV_UINPUT event.
	128	* 3. Issue a UI_BEGIN_FF_UPLOAD ioctl, giving it the
	129	* uinput_ff_upload struct. It will be filled in with the
ff462551 AH	130	* ff_effects passed to upload_effect().
	131	* 4. Perform the effect upload, and place a return code back into
	132	the uinput_ff_upload struct.
1da177e4 LT	133	* 5. Issue a UI_END_FF_UPLOAD ioctl, also giving it the
	134	* uinput_ff_upload_effect struct. This will complete execution
	135	* of our upload_effect() handler.
	136	*
	137	* To implement erase_effect():
ff462551	138	* 1. Wait for an event with type == EV_UINPUT and code == UI_FF_ERASE.
1da177e4 LT	139	* A request ID will be given in 'value'.
	140	* 2. Allocate a uinput_ff_erase struct, fill in request_id with
	141	* the 'value' from the EV_UINPUT event.
	142	* 3. Issue a UI_BEGIN_FF_ERASE ioctl, giving it the
	143	* uinput_ff_erase struct. It will be filled in with the
	144	* effect ID passed to erase_effect().
	145	* 4. Perform the effect erasure, and place a return code back
	146	* into the uinput_ff_erase struct.
1da177e4 LT	147	* 5. Issue a UI_END_FF_ERASE ioctl, also giving it the
	148	* uinput_ff_erase_effect struct. This will complete execution
	149	* of our erase_effect() handler.
	150	*/
	151
ff462551 AH	152	/*
ff462551 AH	153	* This is the new event type, used only by uinput.
1da177e4 LT	154	* 'code' is UI_FF_UPLOAD or UI_FF_ERASE, and 'value'
	155	* is the unique request ID. This number was picked
	156	* arbitrarily, above EV_MAX (since the input system
	157	* never sees it) but in the range of a 16-bit int.
	158	*/
	159	#define EV_UINPUT 0x0101
	160	#define UI_FF_UPLOAD 1
	161	#define UI_FF_ERASE 2
	162
	163	#ifndef NBITS
	164	#define NBITS(x) ((((x)-1)/(sizeof(long)*8))+1)
	165	#endif /* NBITS */
	166
	167	#define UINPUT_MAX_NAME_SIZE 80
	168	struct uinput_user_dev {
	169	char name[UINPUT_MAX_NAME_SIZE];
	170	struct input_id id;
	171	int ff_effects_max;
	172	int absmax[ABS_MAX + 1];
	173	int absmin[ABS_MAX + 1];
	174	int absfuzz[ABS_MAX + 1];
	175	int absflat[ABS_MAX + 1];
	176	};
	177	#endif /* __UINPUT_H_ */
	178