Kernel header

libevdev provides its own copy of the Linux kernel header file and compiles against the definitions define here. Event type and event code names, etc. are taken from the file below:

/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
/*
* 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.
*/
#ifndef _INPUT_H
#define _INPUT_H
#include <sys/time.h>
#include <sys/ioctl.h>
#include <sys/types.h>
#include <linux/types.h>
#include "input-event-codes.h"
/*
* The event structure itself
* Note that __USE_TIME_BITS64 is defined by libc based on
* application's request to use 64 bit time_t.
*/
struct input_event {
#if (__BITS_PER_LONG != 32 || !defined(__USE_TIME_BITS64)) && !defined(__KERNEL__)
struct timeval time;
#define input_event_sec time.tv_sec
#define input_event_usec time.tv_usec
#else
__kernel_ulong_t __sec;
#if defined(__sparc__) && defined(__arch64__)
unsigned int __usec;
#else
__kernel_ulong_t __usec;
#endif
#define input_event_sec __sec
#define input_event_usec __usec
#endif
__u16 type;
__u16 code;
__s32 value;
};
/*
* Protocol version.
*/
#define EV_VERSION 0x010001
/*
* IOCTLs (0x00 - 0x7f)
*/
struct input_id {
__u16 bustype;
__u16 vendor;
__u16 product;
__u16 version;
};
struct input_absinfo {
__s32 value;
__s32 minimum;
__s32 maximum;
__s32 fuzz;
__s32 flat;
__s32 resolution;
};
struct input_keymap_entry {
#define INPUT_KEYMAP_BY_INDEX (1 << 0)
__u8 flags;
__u8 len;
__u16 index;
__u32 keycode;
__u8 scancode[32];
};
struct input_mask {
__u32 type;
__u32 codes_size;
__u64 codes_ptr;
};
#define EVIOCGVERSION _IOR('E', 0x01, int) /* get driver version */
#define EVIOCGID _IOR('E', 0x02, struct input_id) /* get device ID */
#define EVIOCGREP _IOR('E', 0x03, unsigned int[2]) /* get repeat settings */
#define EVIOCSREP _IOW('E', 0x03, unsigned int[2]) /* set repeat settings */
#define EVIOCGKEYCODE _IOR('E', 0x04, unsigned int[2]) /* get keycode */
#define EVIOCGKEYCODE_V2 _IOR('E', 0x04, struct input_keymap_entry)
#define EVIOCSKEYCODE _IOW('E', 0x04, unsigned int[2]) /* set keycode */
#define EVIOCSKEYCODE_V2 _IOW('E', 0x04, struct input_keymap_entry)
#define EVIOCGNAME(len) _IOC(_IOC_READ, 'E', 0x06, len) /* get device name */
#define EVIOCGPHYS(len) _IOC(_IOC_READ, 'E', 0x07, len) /* get physical location */
#define EVIOCGUNIQ(len) _IOC(_IOC_READ, 'E', 0x08, len) /* get unique identifier */
#define EVIOCGPROP(len) _IOC(_IOC_READ, 'E', 0x09, len) /* get device properties */
#define EVIOCGMTSLOTS(len) _IOC(_IOC_READ, 'E', 0x0a, len)
#define EVIOCGKEY(len) _IOC(_IOC_READ, 'E', 0x18, len) /* get global key state */
#define EVIOCGLED(len) _IOC(_IOC_READ, 'E', 0x19, len) /* get all LEDs */
#define EVIOCGSND(len) _IOC(_IOC_READ, 'E', 0x1a, len) /* get all sounds status */
#define EVIOCGSW(len) _IOC(_IOC_READ, 'E', 0x1b, len) /* get all switch states */
#define EVIOCGBIT(ev,len) _IOC(_IOC_READ, 'E', 0x20 + (ev), len) /* get event bits */
#define EVIOCGABS(abs) _IOR('E', 0x40 + (abs), struct input_absinfo) /* get abs value/limits */
#define EVIOCSABS(abs) _IOW('E', 0xc0 + (abs), struct input_absinfo) /* set abs value/limits */
#define EVIOCSFF _IOW('E', 0x80, struct ff_effect) /* send a force effect to a force feedback device */
#define EVIOCRMFF _IOW('E', 0x81, int) /* Erase a force effect */
#define EVIOCGEFFECTS _IOR('E', 0x84, int) /* Report number of effects playable at the same time */
#define EVIOCGRAB _IOW('E', 0x90, int) /* Grab/Release device */
#define EVIOCREVOKE _IOW('E', 0x91, int) /* Revoke device access */
#define EVIOCGMASK _IOR('E', 0x92, struct input_mask) /* Get event-masks */
#define EVIOCSMASK _IOW('E', 0x93, struct input_mask) /* Set event-masks */
#define EVIOCSCLOCKID _IOW('E', 0xa0, int) /* Set clockid to be used for timestamps */
/*
* IDs.
*/
#define ID_BUS 0
#define ID_VENDOR 1
#define ID_PRODUCT 2
#define ID_VERSION 3
#define BUS_PCI 0x01
#define BUS_ISAPNP 0x02
#define BUS_USB 0x03
#define BUS_HIL 0x04
#define BUS_BLUETOOTH 0x05
#define BUS_VIRTUAL 0x06
#define BUS_ISA 0x10
#define BUS_I8042 0x11
#define BUS_XTKBD 0x12
#define BUS_RS232 0x13
#define BUS_GAMEPORT 0x14
#define BUS_PARPORT 0x15
#define BUS_AMIGA 0x16
#define BUS_ADB 0x17
#define BUS_I2C 0x18
#define BUS_HOST 0x19
#define BUS_GSC 0x1A
#define BUS_ATARI 0x1B
#define BUS_SPI 0x1C
#define BUS_RMI 0x1D
#define BUS_CEC 0x1E
#define BUS_INTEL_ISHTP 0x1F
/*
* MT_TOOL types
*/
#define MT_TOOL_FINGER 0x00
#define MT_TOOL_PEN 0x01
#define MT_TOOL_PALM 0x02
#define MT_TOOL_DIAL 0x0a
#define MT_TOOL_MAX 0x0f
/*
* Values describing the status of a force-feedback effect
*/
#define FF_STATUS_STOPPED 0x00
#define FF_STATUS_PLAYING 0x01
#define FF_STATUS_MAX 0x01
/*
* Structures used in ioctls to upload effects to a device
* They are pieces of a bigger structure (called ff_effect)
*/
/*
* All duration values are expressed in ms. Values above 32767 ms (0x7fff)
* should not be used and have unspecified results.
*/
struct ff_replay {
__u16 length;
__u16 delay;
};
struct ff_trigger {
__u16 button;
__u16 interval;
};
struct ff_envelope {
__u16 attack_length;
__u16 attack_level;
__u16 fade_length;
__u16 fade_level;
};
struct ff_constant_effect {
__s16 level;
struct ff_envelope envelope;
};
struct ff_ramp_effect {
__s16 start_level;
__s16 end_level;
struct ff_envelope envelope;
};
struct ff_condition_effect {
__u16 right_saturation;
__u16 left_saturation;
__s16 right_coeff;
__s16 left_coeff;
__u16 deadband;
__s16 center;
};
struct ff_periodic_effect {
__u16 waveform;
__u16 period;
__s16 magnitude;
__s16 offset;
__u16 phase;
struct ff_envelope envelope;
__u32 custom_len;
__s16 *custom_data;
};
struct ff_rumble_effect {
__u16 strong_magnitude;
__u16 weak_magnitude;
};
struct ff_effect {
__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 periodic;
struct ff_condition_effect condition[2]; /* One for each axis */
struct ff_rumble_effect rumble;
} u;
};
/*
* Force feedback effect types
*/
#define FF_RUMBLE 0x50
#define FF_PERIODIC 0x51
#define FF_CONSTANT 0x52
#define FF_SPRING 0x53
#define FF_FRICTION 0x54
#define FF_DAMPER 0x55
#define FF_INERTIA 0x56
#define FF_RAMP 0x57
#define FF_EFFECT_MIN FF_RUMBLE
#define FF_EFFECT_MAX FF_RAMP
/*
* Force feedback periodic effect types
*/
#define FF_SQUARE 0x58
#define FF_TRIANGLE 0x59
#define FF_SINE 0x5a
#define FF_SAW_UP 0x5b
#define FF_SAW_DOWN 0x5c
#define FF_CUSTOM 0x5d
#define FF_WAVEFORM_MIN FF_SQUARE
#define FF_WAVEFORM_MAX FF_CUSTOM
/*
* Set ff device properties
*/
#define FF_GAIN 0x60
#define FF_AUTOCENTER 0x61
/*
* ff->playback(effect_id = FF_GAIN) is the first effect_id to
* cause a collision with another ff method, in this case ff->set_gain().
* Therefore the greatest safe value for effect_id is FF_GAIN - 1,
* and thus the total number of effects should never exceed FF_GAIN.
*/
#define FF_MAX_EFFECTS FF_GAIN
#define FF_MAX 0x7f
#define FF_CNT (FF_MAX+1)
#endif /* _INPUT_H */