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/*
* Key chord input driver
*
* Copyright (C) 2008 Google, Inc.
* Author: Mike Lockwood <lockwood@android.com>
*
* This software is licensed under the terms of the GNU General Public
* License version 2, as published by the Free Software Foundation, and
* may be copied, distributed, and modified under those terms.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
*/
#ifndef __LINUX_KEYCHORD_H_
#define __LINUX_KEYCHORD_H_
#include <linux/input.h>
#define KEYCHORD_VERSION 1
/*
* One or more input_keychord structs are written to /dev/keychord
* at once to specify the list of keychords to monitor.
* Reading /dev/keychord returns the id of a keychord when the
* keychord combination is pressed. A keychord is signalled when
* all of the keys in the keycode list are in the pressed state.
* The order in which the keys are pressed does not matter.
* The keychord will not be signalled if keys not in the keycode
* list are pressed.
* Keychords will not be signalled on key release events.
*/
struct input_keychord {
/* should be KEYCHORD_VERSION */
__u16 version;
/*
* client specified ID, returned from read()
* when this keychord is pressed.
*/
__u16 id;
/* number of keycodes in this keychord */
__u16 count;
/* variable length array of keycodes */
__u16 keycodes[];
};
#endif /* __LINUX_KEYCHORD_H_ */
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