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 #define INPUT_COMPAT_TEST in_compat_syscall()
  21
  22 struct input_event_compat {
  23         struct compat_timeval time;
  24         __u16 type;
  25         __u16 code;
  26         __s32 value;
  27 };
  28
  29 struct ff_periodic_effect_compat {
  30         __u16 waveform;
  31         __u16 period;
  32         __s16 magnitude;
  33         __s16 offset;
  34         __u16 phase;
  35
  36         struct ff_envelope envelope;
  37
  38         __u32 custom_len;
  39         compat_uptr_t custom_data;
  40 };
  41
  42 struct ff_effect_compat {
  43         __u16 type;
  44         __s16 id;
  45         __u16 direction;
  46         struct ff_trigger trigger;
  47         struct ff_replay replay;
  48
  49         union {
  50                 struct ff_constant_effect constant;
  51                 struct ff_ramp_effect ramp;
  52                 struct ff_periodic_effect_compat periodic;
  53                 struct ff_condition_effect condition[2]; /* One for each axis */
  54                 struct ff_rumble_effect rumble;
  55         } u;
  56 };
  57
  58 static inline size_t input_event_size(void)
  59 {
  60         return (INPUT_COMPAT_TEST && !COMPAT_USE_64BIT_TIME) ?
  61                 sizeof(struct input_event_compat) : sizeof(struct input_event);
  62 }
  63
  64 #else
  65
  66 static inline size_t input_event_size(void)
  67 {
  68         return sizeof(struct input_event);
  69 }
  70
  71 #endif /* CONFIG_COMPAT */
  72
  73 int input_event_from_user(const char __user *buffer,
  74                          struct input_event *event);
  75
  76 int input_event_to_user(char __user *buffer,
  77                         const struct input_event *event);
  78
  79 int input_ff_effect_from_user(const char __user *buffer, size_t size,
  80                               struct ff_effect *effect);
  81
  82 #endif /* _INPUT_COMPAT_H */