mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-25 21:54:06 +08:00
85b7720039
Today, userspace sets up an input device based on the data it emits. This is not always enough; a tablet and a touchscreen may emit exactly the same data, for instance, but the former should be set up with a pointer whereas the latter does not need to. Recently, a new type of touchpad has emerged where the buttons are under the pad, which changes logic without changing the emitted data. This patch introduces a new ioctl, EVIOCGPROP, which enables user access to a set of device properties useful during setup. The properties are given as a bitmap in the same fashion as the event types, and are also made available via sysfs, uevent and /proc/bus/input/devices. Acked-by: Ping Cheng <pingc@wacom.com> Acked-by: Chase Douglas <chase.douglas@canonical.com> Acked-by: Dmitry Torokhov <dtor@mail.ru> Signed-off-by: Henrik Rydberg <rydberg@euromail.se>
177 lines
5.8 KiB
C
177 lines
5.8 KiB
C
#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_ */
|
|
|