1 /* 2 * Key chord input driver 3 * 4 * Copyright (C) 2008 Google, Inc. 5 * Author: Mike Lockwood <lockwood (at) android.com> 6 * 7 * This software is licensed under the terms of the GNU General Public 8 * License version 2, as published by the Free Software Foundation, and 9 * may be copied, distributed, and modified under those terms. 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 */ 17 18 #ifndef __LINUX_KEYCHORD_H_ 19 #define __LINUX_KEYCHORD_H_ 20 21 #include <linux/input.h> 22 23 #define KEYCHORD_VERSION 1 24 25 /* 26 * One or more input_keychord structs are written to /dev/keychord 27 * at once to specify the list of keychords to monitor. 28 * Reading /dev/keychord returns the id of a keychord when the 29 * keychord combination is pressed. A keychord is signalled when 30 * all of the keys in the keycode list are in the pressed state. 31 * The order in which the keys are pressed does not matter. 32 * The keychord will not be signalled if keys not in the keycode 33 * list are pressed. 34 * Keychords will not be signalled on key release events. 35 */ 36 struct input_keychord { 37 /* should be KEYCHORD_VERSION */ 38 __u16 version; 39 /* 40 * client specified ID, returned from read() 41 * when this keychord is pressed. 42 */ 43 __u16 id; 44 45 /* number of keycodes in this keychord */ 46 __u16 count; 47 48 /* variable length array of keycodes */ 49 __u16 keycodes[]; 50 }; 51 52 #endif /* __LINUX_KEYCHORD_H_ */ 53
