/* SPDX-License-Identifier: GPL-2.0-only */
#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
 */

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

#ifdef CONFIG_COMPAT

struct input_event_compat {
        compat_ulong_t sec;
        compat_ulong_t usec;
        __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 (in_compat_syscall() && !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);

int input_bits_to_string(char *buf, int buf_size, unsigned long bits,
                         bool skip_empty);

#endif /* _INPUT_COMPAT_H */