drivers/input/input-compat.h

   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 struct input_event_compat {
  21         struct compat_timeval time;
  22         __u16 type;
  23         __u16 code;
  24         __s32 value;
  25 };
  26
  27 struct ff_periodic_effect_compat {
  28         __u16 waveform;
  29         __u16 period;
  30         __s16 magnitude;
  31         __s16 offset;
  32         __u16 phase;
  33
  34         struct ff_envelope envelope;
  35
  36         __u32 custom_len;
  37         compat_uptr_t custom_data;
  38 };
  39
  40 struct ff_effect_compat {
  41         __u16 type;
  42         __s16 id;
  43         __u16 direction;
  44         struct ff_trigger trigger;
  45         struct ff_replay replay;
  46
  47         union {
  48                 struct ff_constant_effect constant;
  49                 struct ff_ramp_effect ramp;
  50                 struct ff_periodic_effect_compat periodic;
  51                 struct ff_condition_effect condition[2]; /* One for each axis */
  52                 struct ff_rumble_effect rumble;
  53         } u;
  54 };
  55
  56 static inline size_t input_event_size(void)
  57 {
  58         return (in_compat_syscall() && !COMPAT_USE_64BIT_TIME) ?
  59                 sizeof(struct input_event_compat) : sizeof(struct input_event);
  60 }
  61
  62 #else
  63
  64 static inline size_t input_event_size(void)
  65 {
  66         return sizeof(struct input_event);
  67 }
  68
  69 #endif /* CONFIG_COMPAT */
  70
  71 int input_event_from_user(const char __user *buffer,
  72                          struct input_event *event);
  73
  74 int input_event_to_user(char __user *buffer,
  75                         const struct input_event *event);
  76
  77 int input_ff_effect_from_user(const char __user *buffer, size_t size,
  78                               struct ff_effect *effect);
  79
  80 #endif /* _INPUT_COMPAT_H */