1/* SPDX-License-Identifier: GPL-2.0-only */
2#ifndef _INPUT_COMPAT_H
3#define _INPUT_COMPAT_H
4
5/*
6 * 32bit compatibility wrappers for the input subsystem.
7 *
8 * Very heavily based on evdev.c - Copyright (c) 1999-2002 Vojtech Pavlik
9 */
10
11#include <linux/compiler.h>
12#include <linux/compat.h>
13#include <linux/input.h>
14
15#ifdef CONFIG_COMPAT
16
17struct input_event_compat {
18 compat_ulong_t sec;
19 compat_ulong_t usec;
20 __u16 type;
21 __u16 code;
22 __s32 value;
23};
24
25struct ff_periodic_effect_compat {
26 __u16 waveform;
27 __u16 period;
28 __s16 magnitude;
29 __s16 offset;
30 __u16 phase;
31
32 struct ff_envelope envelope;
33
34 __u32 custom_len;
35 compat_uptr_t custom_data;
36};
37
38struct ff_effect_compat {
39 __u16 type;
40 __s16 id;
41 __u16 direction;
42 struct ff_trigger trigger;
43 struct ff_replay replay;
44
45 union {
46 struct ff_constant_effect constant;
47 struct ff_ramp_effect ramp;
48 struct ff_periodic_effect_compat periodic;
49 struct ff_condition_effect condition[2]; /* One for each axis */
50 struct ff_rumble_effect rumble;
51 } u;
52};
53
54static inline size_t input_event_size(void)
55{
56 return (in_compat_syscall() && !COMPAT_USE_64BIT_TIME) ?
57 sizeof(struct input_event_compat) : sizeof(struct input_event);
58}
59
60#else
61
62static inline size_t input_event_size(void)
63{
64 return sizeof(struct input_event);
65}
66
67#endif /* CONFIG_COMPAT */
68
69int input_event_from_user(const char __user *buffer,
70 struct input_event *event);
71
72int input_event_to_user(char __user *buffer,
73 const struct input_event *event);
74
75int input_ff_effect_from_user(const char __user *buffer, size_t size,
76 struct ff_effect *effect);
77
78int input_bits_to_string(char *buf, int buf_size, unsigned long bits,
79 bool skip_empty);
80
81#endif /* _INPUT_COMPAT_H */
82