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