uinput.h
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上传日期:2009-04-28
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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:
- * 0.2 16/10/2004 (Micah Dowty <micah@navi.cx>)
- * - added force feedback support
- * - added UI_SET_PHYS
- * 0.1 20/06/2002
- * - first public version
- */
- #ifdef __KERNEL__
- #define UINPUT_MINOR 223
- #define UINPUT_NAME "uinput"
- #define UINPUT_BUFFER_SIZE 16
- #define UINPUT_NUM_REQUESTS 16
- /* state flags => bit index for {set|clear|test}_bit ops */
- #define UIST_CREATED 0
- struct uinput_request {
- int id;
- int code; /* UI_FF_UPLOAD, UI_FF_ERASE */
- int retval;
- struct completion done;
- union {
- int effect_id;
- struct ff_effect* effect;
- } u;
- };
- struct uinput_device {
- struct input_dev *dev;
- unsigned long state;
- wait_queue_head_t waitq;
- unsigned char ready,
- head,
- tail;
- struct input_event buff[UINPUT_BUFFER_SIZE];
- 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 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_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 EV_FF is set.
- * Otherwise, default implementations of upload_effect and erase_effect
- * are used.
- *
- * 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_effect passed to upload_effect().
- * 4. Perform the effect upload, and place the modified ff_effect
- * and 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.
- * and 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_ */