uinput.h

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/*
 *  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 <[email protected]>
 *
 * 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 <[email protected]>)
 *      - added force feedback support
 *             - added UI_SET_PHYS
 *  0.1 20/06/2002
 *      - first public version
 */
#ifndef __UINPUT_H_
#define __UINPUT_H_

#include <uapi/linux/uinput.h>

#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 {
    unsigned int        id;
    unsigned int        code;   /* UI_FF_UPLOAD, UI_FF_ERASE */

    int         retval;
    struct completion   done;

    union {
        unsigned 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];
    unsigned int        ff_effects_max;

    struct uinput_request   *requests[UINPUT_NUM_REQUESTS];
    wait_queue_head_t   requests_waitq;
    spinlock_t      requests_lock;
};
#endif  /* __UINPUT_H_ */