input-compat.h

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#ifndef _INPUT_COMPAT_H
#define _INPUT_COMPAT_H

/*
 * 32bit compatibility wrappers for the input subsystem.
 *
 * Very heavily based on evdev.c - Copyright (c) 1999-2002 Vojtech Pavlik
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 as published by
 * the Free Software Foundation.
 */

#include <linux/compiler.h>
#include <linux/compat.h>
#include <linux/input.h>

#ifdef CONFIG_COMPAT

/* Note to the author of this code: did it ever occur to
   you why the ifdefs are needed? Think about it again. -AK */
#if defined(CONFIG_X86_64) || defined(CONFIG_TILE)
#  define INPUT_COMPAT_TEST is_compat_task()
#elif defined(CONFIG_S390)
#  define INPUT_COMPAT_TEST test_thread_flag(TIF_31BIT)
#elif defined(CONFIG_MIPS)
#  define INPUT_COMPAT_TEST test_thread_flag(TIF_32BIT_ADDR)
#else
#  define INPUT_COMPAT_TEST test_thread_flag(TIF_32BIT)
#endif

struct input_event_compat {
    struct compat_timeval time;
    __u16 type;
    __u16 code;
    __s32 value;
};

struct ff_periodic_effect_compat {
    __u16 waveform;
    __u16 period;
    __s16 magnitude;
    __s16 offset;
    __u16 phase;

    struct ff_envelope envelope;

    __u32 custom_len;
    compat_uptr_t custom_data;
};

struct ff_effect_compat {
    __u16 type;
    __s16 id;
    __u16 direction;
    struct ff_trigger trigger;
    struct ff_replay replay;

    union {
        struct ff_constant_effect constant;
        struct ff_ramp_effect ramp;
        struct ff_periodic_effect_compat periodic;
        struct ff_condition_effect condition[2]; /* One for each axis */
        struct ff_rumble_effect rumble;
    } u;
};

static inline size_t input_event_size(void)
{
    return (INPUT_COMPAT_TEST && !COMPAT_USE_64BIT_TIME) ?
        sizeof(struct input_event_compat) : sizeof(struct input_event);
}

#else

static inline size_t input_event_size(void)
{
    return sizeof(struct input_event);
}

#endif /* CONFIG_COMPAT */

int input_event_from_user(const char __user *buffer,
             struct input_event *event);

int input_event_to_user(char __user *buffer,
            const struct input_event *event);

int input_ff_effect_from_user(const char __user *buffer, size_t size,
                  struct ff_effect *effect);

#endif /* _INPUT_COMPAT_H */