linux/drivers/input/input-compat.h
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   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
  32struct input_event_compat {
  33        struct compat_timeval time;
  34        __u16 type;
  35        __u16 code;
  36        __s32 value;
  37};
  38
  39struct 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
  52struct ff_effect_compat {
  53        __u16 type;
  54        __s16 id;
  55        __u16 direction;
  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
  68static 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
  76static inline size_t input_event_size(void)
  77{
  78        return sizeof(struct input_event);
  79}
  80
  81#endif /* CONFIG_COMPAT */
  82
  83int input_event_from_user(const char __user *buffer,
  84                         struct input_event *event);
  85
  86int input_event_to_user(char __user *buffer,
  87                        const struct input_event *event);
  88
  89int input_ff_effect_from_user(const char __user *buffer, size_t size,
  90                              struct ff_effect *effect);
  91
  92#endif /* _INPUT_COMPAT_H */
  93
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