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
  48 enum uinput_state { UIST_NEW_DEVICE, UIST_SETUP_COMPLETE, UIST_CREATED };
  49
  50 struct 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
  66 struct 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_ */