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  *      0.3     24/05/2006 (Anssi Hannula <anssi.hannulagmail.com>)
  24  *              - update ff support for the changes in kernel interface
  25  *              - add UINPUT_VERSION
  26  *      0.2     16/10/2004 (Micah Dowty <micah@navi.cx>)
  27  *              - added force feedback support
  28  *             - added UI_SET_PHYS
  29  *      0.1     20/06/2002
  30  *              - first public version
  31  */
  32 #ifndef __UINPUT_H_
  33 #define __UINPUT_H_
  34
  35 #include <uapi/linux/uinput.h>
  36
  37 #define UINPUT_NAME             "uinput"
  38 #define UINPUT_BUFFER_SIZE      16
  39 #define UINPUT_NUM_REQUESTS     16
  40
  41 enum uinput_state { UIST_NEW_DEVICE, UIST_SETUP_COMPLETE, UIST_CREATED };
  42
  43 struct uinput_request {
  44         unsigned int            id;
  45         unsigned int            code;   /* UI_FF_UPLOAD, UI_FF_ERASE */
  46
  47         int                     retval;
  48         struct completion       done;
  49
  50         union {
  51                 unsigned int    effect_id;
  52                 struct {
  53                         struct ff_effect *effect;
  54                         struct ff_effect *old;
  55                 } upload;
  56         } u;
  57 };
  58
  59 struct uinput_device {
  60         struct input_dev        *dev;
  61         struct mutex            mutex;
  62         enum uinput_state       state;
  63         wait_queue_head_t       waitq;
  64         unsigned char           ready;
  65         unsigned char           head;
  66         unsigned char           tail;
  67         struct input_event      buff[UINPUT_BUFFER_SIZE];
  68         unsigned int            ff_effects_max;
  69
  70         struct uinput_request   *requests[UINPUT_NUM_REQUESTS];
  71         wait_queue_head_t       requests_waitq;
  72         spinlock_t              requests_lock;
  73 };
  74 #endif  /* __UINPUT_H_ */