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