Linux Kernel  3.7.1
 All Data Structures Namespaces Files Functions Variables Typedefs Enumerations Enumerator Macros Groups Pages
input-compat.h
Go to the documentation of this file.
1 #ifndef _INPUT_COMPAT_H
2 #define _INPUT_COMPAT_H
3 
4 /*
5  * 32bit compatibility wrappers for the input subsystem.
6  *
7  * Very heavily based on evdev.c - Copyright (c) 1999-2002 Vojtech Pavlik
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/compiler.h>
15 #include <linux/compat.h>
16 #include <linux/input.h>
17 
18 #ifdef CONFIG_COMPAT
19 
20 /* Note to the author of this code: did it ever occur to
21  you why the ifdefs are needed? Think about it again. -AK */
22 #if defined(CONFIG_X86_64) || defined(CONFIG_TILE)
23 # define INPUT_COMPAT_TEST is_compat_task()
24 #elif defined(CONFIG_S390)
25 # define INPUT_COMPAT_TEST test_thread_flag(TIF_31BIT)
26 #elif defined(CONFIG_MIPS)
27 # define INPUT_COMPAT_TEST test_thread_flag(TIF_32BIT_ADDR)
28 #else
29 # define INPUT_COMPAT_TEST test_thread_flag(TIF_32BIT)
30 #endif
31 
32 struct input_event_compat {
33  struct compat_timeval time;
34  __u16 type;
35  __u16 code;
36  __s32 value;
37 };
38 
39 struct ff_periodic_effect_compat {
40  __u16 waveform;
41  __u16 period;
42  __s16 magnitude;
43  __s16 offset;
44  __u16 phase;
45 
46  struct ff_envelope envelope;
47 
48  __u32 custom_len;
49  compat_uptr_t custom_data;
50 };
51 
52 struct ff_effect_compat {
53  __u16 type;
54  __s16 id;
56  struct ff_trigger trigger;
57  struct ff_replay replay;
58 
59  union {
60  struct ff_constant_effect constant;
61  struct ff_ramp_effect ramp;
62  struct ff_periodic_effect_compat periodic;
63  struct ff_condition_effect condition[2]; /* One for each axis */
64  struct ff_rumble_effect rumble;
65  } u;
66 };
67 
68 static inline size_t input_event_size(void)
69 {
70  return (INPUT_COMPAT_TEST && !COMPAT_USE_64BIT_TIME) ?
71  sizeof(struct input_event_compat) : sizeof(struct input_event);
72 }
73 
74 #else
75 
76 static inline size_t input_event_size(void)
77 {
78  return sizeof(struct input_event);
79 }
80 
81 #endif /* CONFIG_COMPAT */
82 
83 int input_event_from_user(const char __user *buffer,
84  struct input_event *event);
85 
86 int input_event_to_user(char __user *buffer,
87  const struct input_event *event);
88 
89 int input_ff_effect_from_user(const char __user *buffer, size_t size,
90  struct ff_effect *effect);
91 
92 #endif /* _INPUT_COMPAT_H */