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* 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 _UAPI_INPUT_H
#define _UAPI_INPUT_H
#ifndef __KERNEL__
#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
struct input_event {
struct timeval time;
__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 - used by EVIOCGABS/EVIOCSABS ioctls
* @value: latest reported value for the axis.
* @minimum: specifies minimum value for the axis.
* @maximum: specifies maximum value for the axis.
* @fuzz: specifies fuzz value that is used to filter noise from
* the event stream.
* @flat: values that are within this value will be discarded by
* joydev interface and reported as 0 instead.
* @resolution: specifies resolution for the values reported for
* the axis.
* Note that input core does not clamp reported values to the
* [minimum, maximum] limits, such task is left to userspace.
* Resolution for main axes (ABS_X, ABS_Y, ABS_Z) is reported in
* units per millimeter (units/mm), resolution for rotational axes
* (ABS_RX, ABS_RY, ABS_RZ) is reported in units per radian.
struct input_absinfo {
__s32 value;
__s32 minimum;
__s32 maximum;
__s32 fuzz;
__s32 flat;
__s32 resolution;
* struct input_keymap_entry - used by EVIOCGKEYCODE/EVIOCSKEYCODE ioctls
* @scancode: scancode represented in machine-endian form.
* @len: length of the scancode that resides in @scancode buffer.
* @index: index in the keymap, may be used instead of scancode
* @flags: allows to specify how kernel should handle the request. For
* example, setting INPUT_KEYMAP_BY_INDEX flag indicates that kernel
* should perform lookup in keymap by @index instead of @scancode
* @keycode: key code assigned to this scancode
* The structure is used to retrieve and modify keymap data. Users have
* option of performing lookup either by @scancode itself or by @index
* in keymap entry. EVIOCGKEYCODE will also return scancode or index
* (depending on which element was used to perform lookup).
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 */
* EVIOCGMTSLOTS(len) - get MT slot values
* @len: size of the data buffer in bytes
* The ioctl buffer argument should be binary equivalent to
* struct input_mt_request_layout {
* __u32 code;
* __s32 values[num_slots];
* };
* where num_slots is the (arbitrary) number of MT slots to extract.
* The ioctl size argument (len) is the size of the buffer, which
* should satisfy len = (num_slots + 1) * sizeof(__s32). If len is
* too small to fit all available slots, the first num_slots are
* returned.
* Before the call, code is set to the wanted ABS_MT event type. On
* return, values[] is filled with the slot values for the specified
* ABS_MT code.
* If the request code is not an ABS_MT value, -EINVAL is returned.
#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 */
* EVIOCGMASK - Retrieve current event mask
* This ioctl allows user to retrieve the current event mask for specific
* event type. The argument must be of type "struct input_mask" and
* specifies the event type to query, the address of the receive buffer and
* the size of the receive buffer.
* The event mask is a per-client mask that specifies which events are
* forwarded to the client. Each event code is represented by a single bit
* in the event mask. If the bit is set, the event is passed to the client
* normally. Otherwise, the event is filtered and will never be queued on
* the client's receive buffer.
* Event masks do not affect global state of the input device. They only
* affect the file descriptor they are applied to.
* The default event mask for a client has all bits set, i.e. all events
* are forwarded to the client. If the kernel is queried for an unknown
* event type or if the receive buffer is larger than the number of
* event codes known to the kernel, the kernel returns all zeroes for those
* codes.
* At maximum, codes_size bytes are copied.
* This ioctl may fail with ENODEV in case the file is revoked, EFAULT
* if the receive-buffer points to invalid memory, or EINVAL if the kernel
* does not implement the ioctl.
#define EVIOCGMASK _IOR('E', 0x92, struct input_mask) /* Get event-masks */
* EVIOCSMASK - Set event mask
* This ioctl is the counterpart to EVIOCGMASK. Instead of receiving the
* current event mask, this changes the client's event mask for a specific
* type. See EVIOCGMASK for a description of event-masks and the
* argument-type.
* This ioctl provides full forward compatibility. If the passed event type
* is unknown to the kernel, or if the number of event codes specified in
* the mask is bigger than what is known to the kernel, the ioctl is still
* accepted and applied. However, any unknown codes are left untouched and
* stay cleared. That means, the kernel always filters unknown codes
* regardless of what the client requests. If the new mask doesn't cover
* all known event-codes, all remaining codes are automatically cleared and
* thus filtered.
* This ioctl may fail with ENODEV in case the file is revoked. EFAULT is
* returned if the receive-buffer points to invalid memory. EINVAL is returned
* if the kernel does not implement the ioctl.
#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
* MT_TOOL types
#define MT_TOOL_FINGER 0
#define MT_TOOL_PEN 1
#define MT_TOOL_PALM 2
#define MT_TOOL_MAX 2
* 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 - defines scheduling of the force-feedback effect
* @length: duration of the effect
* @delay: delay before effect should start playing
struct ff_replay {
__u16 length;
__u16 delay;
* struct ff_trigger - defines what triggers the force-feedback effect
* @button: number of the button triggering the effect
* @interval: controls how soon the effect can be re-triggered
struct ff_trigger {
__u16 button;
__u16 interval;
* struct ff_envelope - generic force-feedback effect envelope
* @attack_length: duration of the attack (ms)
* @attack_level: level at the beginning of the attack
* @fade_length: duration of fade (ms)
* @fade_level: level at the end of fade
* The @attack_level and @fade_level are absolute values; when applying
* envelope force-feedback core will convert to positive/negative
* value based on polarity of the default level of the effect.
* Valid range for the attack and fade levels is 0x0000 - 0x7fff
struct ff_envelope {
__u16 attack_length;
__u16 attack_level;
__u16 fade_length;
__u16 fade_level;
* struct ff_constant_effect - defines parameters of a constant force-feedback effect
* @level: strength of the effect; may be negative
* @envelope: envelope data
struct ff_constant_effect {
__s16 level;
struct ff_envelope envelope;
* struct ff_ramp_effect - defines parameters of a ramp force-feedback effect
* @start_level: beginning strength of the effect; may be negative
* @end_level: final strength of the effect; may be negative
* @envelope: envelope data
struct ff_ramp_effect {
__s16 start_level;
__s16 end_level;
struct ff_envelope envelope;
* struct ff_condition_effect - defines a spring or friction force-feedback effect
* @right_saturation: maximum level when joystick moved all way to the right
* @left_saturation: same for the left side
* @right_coeff: controls how fast the force grows when the joystick moves
* to the right
* @left_coeff: same for the left side
* @deadband: size of the dead zone, where no force is produced
* @center: position of the dead zone
struct ff_condition_effect {
__u16 right_saturation;
__u16 left_saturation;
__s16 right_coeff;
__s16 left_coeff;
__u16 deadband;
__s16 center;
* struct ff_periodic_effect - defines parameters of a periodic force-feedback effect
* @waveform: kind of the effect (wave)
* @period: period of the wave (ms)
* @magnitude: peak value
* @offset: mean value of the wave (roughly)
* @phase: 'horizontal' shift
* @envelope: envelope data
* @custom_len: number of samples (FF_CUSTOM only)
* @custom_data: buffer of samples (FF_CUSTOM only)
* FF_SAW_DOWN, FF_CUSTOM. The exact syntax FF_CUSTOM is undefined
* for the time being as no driver supports it yet.
* Note: the data pointed by custom_data is copied by the driver.
* You can therefore dispose of the memory after the upload/update.
struct ff_periodic_effect {
__u16 waveform;
__u16 period;
__s16 magnitude;
__s16 offset;
__u16 phase;
struct ff_envelope envelope;
__u32 custom_len;
__s16 __user *custom_data;
* struct ff_rumble_effect - defines parameters of a periodic force-feedback effect
* @strong_magnitude: magnitude of the heavy motor
* @weak_magnitude: magnitude of the light one
* Some rumble pads have two motors of different weight. Strong_magnitude
* represents the magnitude of the vibration generated by the heavy one.
struct ff_rumble_effect {
__u16 strong_magnitude;
__u16 weak_magnitude;
* struct ff_effect - defines force feedback effect
* @type: type of the effect (FF_CONSTANT, FF_PERIODIC, FF_RAMP, FF_SPRING,
* @id: an unique id assigned to an effect
* @direction: direction of the effect
* @trigger: trigger conditions (struct ff_trigger)
* @replay: scheduling of the effect (struct ff_replay)
* @u: effect-specific structure (one of ff_constant_effect, ff_ramp_effect,
* ff_periodic_effect, ff_condition_effect, ff_rumble_effect) further
* defining effect parameters
* This structure is sent through ioctl from the application to the driver.
* To create a new effect application should set its @id to -1; the kernel
* will return assigned @id which can later be used to update or delete
* this effect.
* Direction of the effect is encoded as follows:
* 0 deg -> 0x0000 (down)
* 90 deg -> 0x4000 (left)
* 180 deg -> 0x8000 (up)
* 270 deg -> 0xC000 (right)
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
* 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
* 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 0x7f
#define FF_CNT (FF_MAX+1)
#endif /* _UAPI_INPUT_H */
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