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_ */ 82