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#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];
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_ */
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