1#ifndef _INPUT_MT_H
2#define _INPUT_MT_H
3
4/*
5 * Input Multitouch Library
6 *
7 * Copyright (c) 2010 Henrik Rydberg
8 *
9 * This program is free software; you can redistribute it and/or modify it
10 * under the terms of the GNU General Public License version 2 as published by
11 * the Free Software Foundation.
12 */
13
14#include <linux/input.h>
15
16#define TRKID_MAX	0xffff
17
18/**
19 * struct input_mt_slot - represents the state of an input MT slot
20 * @abs: holds current values of ABS_MT axes for this slot
21 */
22struct input_mt_slot {
23	int abs[ABS_MT_LAST - ABS_MT_FIRST + 1];
24};
25
26static inline void input_mt_set_value(struct input_mt_slot *slot,
27				      unsigned code, int value)
28{
29	slot->abs[code - ABS_MT_FIRST] = value;
30}
31
32static inline int input_mt_get_value(const struct input_mt_slot *slot,
33				     unsigned code)
34{
35	return slot->abs[code - ABS_MT_FIRST];
36}
37
38int input_mt_init_slots(struct input_dev *dev, unsigned int num_slots);
39void input_mt_destroy_slots(struct input_dev *dev);
40
41static inline int input_mt_new_trkid(struct input_dev *dev)
42{
43	return dev->trkid++ & TRKID_MAX;
44}
45
46static inline void input_mt_slot(struct input_dev *dev, int slot)
47{
48	input_event(dev, EV_ABS, ABS_MT_SLOT, slot);
49}
50
51static inline bool input_is_mt_value(int axis)
52{
53	return axis >= ABS_MT_FIRST && axis <= ABS_MT_LAST;
54}
55
56static inline bool input_is_mt_axis(int axis)
57{
58	return axis == ABS_MT_SLOT || input_is_mt_value(axis);
59}
60
61void input_mt_report_slot_state(struct input_dev *dev,
62				unsigned int tool_type, bool active);
63
64void input_mt_report_finger_count(struct input_dev *dev, int count);
65void input_mt_report_pointer_emulation(struct input_dev *dev, bool use_count);
66
67#endif
68