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 #ifdef CONFIG_X86_64
  23 #  define INPUT_COMPAT_TEST is_compat_task()
  24 #elif defined(CONFIG_IA64)
  25 #  define INPUT_COMPAT_TEST IS_IA32_PROCESS(task_pt_regs(current))
  26 #elif defined(CONFIG_S390)
  27 #  define INPUT_COMPAT_TEST test_thread_flag(TIF_31BIT)
  28 #elif defined(CONFIG_MIPS)
  29 #  define INPUT_COMPAT_TEST test_thread_flag(TIF_32BIT_ADDR)
  30 #else
  31 #  define INPUT_COMPAT_TEST test_thread_flag(TIF_32BIT)
  32 #endif
  33
  34 struct input_event_compat {
  35         struct compat_timeval time;
  36         __u16 type;
  37         __u16 code;
  38         __s32 value;
  39 };
  40
  41 struct ff_periodic_effect_compat {
  42         __u16 waveform;
  43         __u16 period;
  44         __s16 magnitude;
  45         __s16 offset;
  46         __u16 phase;
  47
  48         struct ff_envelope envelope;
  49
  50         __u32 custom_len;
  51         compat_uptr_t custom_data;
  52 };
  53
  54 struct ff_effect_compat {
  55         __u16 type;
  56         __s16 id;
  57         __u16 direction;
  58         struct ff_trigger trigger;
  59         struct ff_replay replay;
  60
  61         union {
  62                 struct ff_constant_effect constant;
  63                 struct ff_ramp_effect ramp;
  64                 struct ff_periodic_effect_compat periodic;
  65                 struct ff_condition_effect condition[2]; /* One for each axis */
  66                 struct ff_rumble_effect rumble;
  67         } u;
  68 };
  69
  70 static inline size_t input_event_size(void)
  71 {
  72         return INPUT_COMPAT_TEST ?
  73                 sizeof(struct input_event_compat) : sizeof(struct input_event);
  74 }
  75
  76 #else
  77
  78 static inline size_t input_event_size(void)
  79 {
  80         return sizeof(struct input_event);
  81 }
  82
  83 #endif /* CONFIG_COMPAT */
  84
  85 int input_event_from_user(const char __user *buffer,
  86                          struct input_event *event);
  87
  88 int input_event_to_user(char __user *buffer,
  89                         const struct input_event *event);
  90
  91 int input_ff_effect_from_user(const char __user *buffer, size_t size,
  92                               struct ff_effect *effect);
  93
  94 #endif /* _INPUT_COMPAT_H */