drivers/input/input-compat.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 #ifndef _INPUT_COMPAT_H
   3 #define _INPUT_COMPAT_H
   4
   5 /*
   6  * 32bit compatibility wrappers for the input subsystem.
   7  *
   8  * Very heavily based on evdev.c - Copyright (c) 1999-2002 Vojtech Pavlik
   9  */
  10
  11 #include <linux/compiler.h>
  12 #include <linux/compat.h>
  13 #include <linux/input.h>
  14
  15 #ifdef CONFIG_COMPAT
  16
  17 struct input_event_compat {
  18         compat_ulong_t sec;
  19         compat_ulong_t usec;
  20         __u16 type;
  21         __u16 code;
  22         __s32 value;
  23 };
  24
  25 struct ff_periodic_effect_compat {
  26         __u16 waveform;
  27         __u16 period;
  28         __s16 magnitude;
  29         __s16 offset;
  30         __u16 phase;
  31
  32         struct ff_envelope envelope;
  33
  34         __u32 custom_len;
  35         compat_uptr_t custom_data;
  36 };
  37
  38 struct ff_effect_compat {
  39         __u16 type;
  40         __s16 id;
  41         __u16 direction;
  42         struct ff_trigger trigger;
  43         struct ff_replay replay;
  44
  45         union {
  46                 struct ff_constant_effect constant;
  47                 struct ff_ramp_effect ramp;
  48                 struct ff_periodic_effect_compat periodic;
  49                 struct ff_condition_effect condition[2]; /* One for each axis */
  50                 struct ff_rumble_effect rumble;
  51         } u;
  52 };
  53
  54 static inline size_t input_event_size(void)
  55 {
  56         return (in_compat_syscall() && !COMPAT_USE_64BIT_TIME) ?
  57                 sizeof(struct input_event_compat) : sizeof(struct input_event);
  58 }
  59
  60 #else
  61
  62 static inline size_t input_event_size(void)
  63 {
  64         return sizeof(struct input_event);
  65 }
  66
  67 #endif /* CONFIG_COMPAT */
  68
  69 int input_event_from_user(const char __user *buffer,
  70                          struct input_event *event);
  71
  72 int input_event_to_user(char __user *buffer,
  73                         const struct input_event *event);
  74
  75 int input_ff_effect_from_user(const char __user *buffer, size_t size,
  76                               struct ff_effect *effect);
  77
  78 #endif /* _INPUT_COMPAT_H */