LXR linux/include/linux/uinput.h

   1/*
   2 *  User level driver support for input subsystem
   3 *
   4 * Heavily based on evdev.c by Vojtech Pavlik
   5 *
   6 * This program is free software; you can redistribute it and/or modify
   7 * it under the terms of the GNU General Public License as published by
   8 * the Free Software Foundation; either version 2 of the License, or
   9 * (at your option) any later version.
  10 *
  11 * This program is distributed in the hope that it will be useful,
  12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 * GNU General Public License for more details.
  15 *
  16 * You should have received a copy of the GNU General Public License
  17 * along with this program; if not, write to the Free Software
  18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  19 *
  20 * Author: Aristeu Sergio Rozanski Filho <aris@cathedrallabs.org>
  21 *
  22 * Changes/Revisions:
  23 *      0.5     08/13/2015 (David Herrmann <dh.herrmann@gmail.com> &
  24 *                          Benjamin Tissoires <benjamin.tissoires@redhat.com>)
  25 *              - add UI_DEV_SETUP ioctl
  26 *              - add UI_ABS_SETUP ioctl
  27 *              - add UI_GET_VERSION ioctl
  28 *      0.4     01/09/2014 (Benjamin Tissoires <benjamin.tissoires@redhat.com>)
  29 *              - add UI_GET_SYSNAME ioctl
  30 *      0.3     24/05/2006 (Anssi Hannula <anssi.hannulagmail.com>)
  31 *              - update ff support for the changes in kernel interface
  32 *              - add UINPUT_VERSION
  33 *      0.2     16/10/2004 (Micah Dowty <micah@navi.cx>)
  34 *              - added force feedback support
  35 *             - added UI_SET_PHYS
  36 *      0.1     20/06/2002
  37 *              - first public version
  38 */
  39#ifndef __UINPUT_H_
  40#define __UINPUT_H_
  41
  42#include <uapi/linux/uinput.h>
  43
  44#define UINPUT_NAME             "uinput"
  45#define UINPUT_BUFFER_SIZE      16
  46#define UINPUT_NUM_REQUESTS     16
  47
  48enum uinput_state { UIST_NEW_DEVICE, UIST_SETUP_COMPLETE, UIST_CREATED };
  49
  50struct uinput_request {
  51        unsigned int            id;
  52        unsigned int            code;   /* UI_FF_UPLOAD, UI_FF_ERASE */
  53
  54        int                     retval;
  55        struct completion       done;
  56
  57        union {
  58                unsigned int    effect_id;
  59                struct {
  60                        struct ff_effect *effect;
  61                        struct ff_effect *old;
  62                } upload;
  63        } u;
  64};
  65
  66struct uinput_device {
  67        struct input_dev        *dev;
  68        struct mutex            mutex;
  69        enum uinput_state       state;
  70        wait_queue_head_t       waitq;
  71        unsigned char           ready;
  72        unsigned char           head;
  73        unsigned char           tail;
  74        struct input_event      buff[UINPUT_BUFFER_SIZE];
  75        unsigned int            ff_effects_max;
  76
  77        struct uinput_request   *requests[UINPUT_NUM_REQUESTS];
  78        wait_queue_head_t       requests_waitq;
  79        spinlock_t              requests_lock;
  80};
  81#endif  /* __UINPUT_H_ */
  82