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linux-next/drivers/input/input-compat.h
Philip Langdale 2d56f3a32c Input: refactor evdev 32bit compat to be shareable with uinput
Currently, evdev has working 32bit compatibility and uinput does not. uinput
needs the input_event code that evdev uses, so let's refactor it so it can
be shared.

[dtor@mail.ru: add fix for force feedback compat issues]
Signed-off-by: Philip Langdale <philipl@overt.org>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
2008-10-27 22:03:42 -04:00

95 lines
2.2 KiB
C

#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 */
#ifdef CONFIG_X86_64
# define INPUT_COMPAT_TEST is_compat_task()
#elif defined(CONFIG_IA64)
# define INPUT_COMPAT_TEST IS_IA32_PROCESS(task_pt_regs(current))
#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 ?
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 */