include/uapi/linux/input.h

   1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
   2 /*
   3  * Copyright (c) 1999-2002 Vojtech Pavlik
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 as published by
   7  * the Free Software Foundation.
   8  */
   9 #ifndef _UAPI_INPUT_H
  10 #define _UAPI_INPUT_H
  11
  12
  13 #ifndef __KERNEL__
  14 #include <sys/time.h>
  15 #include <sys/ioctl.h>
  16 #include <sys/types.h>
  17 #include <linux/types.h>
  18 #endif
  19
  20 #include "input-event-codes.h"
  21
  22 /*
  23  * The event structure itself
  24  */
  25
  26 struct input_event {
  27         struct timeval time;
  28         __u16 type;
  29         __u16 code;
  30         __s32 value;
  31 };
  32
  33 /*
  34  * Protocol version.
  35  */
  36
  37 #define EV_VERSION              0x010001
  38
  39 /*
  40  * IOCTLs (0x00 - 0x7f)
  41  */
  42
  43 struct input_id {
  44         __u16 bustype;
  45         __u16 vendor;
  46         __u16 product;
  47         __u16 version;
  48 };
  49
  50 /**
  51  * struct input_absinfo - used by EVIOCGABS/EVIOCSABS ioctls
  52  * @value: latest reported value for the axis.
  53  * @minimum: specifies minimum value for the axis.
  54  * @maximum: specifies maximum value for the axis.
  55  * @fuzz: specifies fuzz value that is used to filter noise from
  56  *      the event stream.
  57  * @flat: values that are within this value will be discarded by
  58  *      joydev interface and reported as 0 instead.
  59  * @resolution: specifies resolution for the values reported for
  60  *      the axis.
  61  *
  62  * Note that input core does not clamp reported values to the
  63  * [minimum, maximum] limits, such task is left to userspace.
  64  *
  65  * The default resolution for main axes (ABS_X, ABS_Y, ABS_Z)
  66  * is reported in units per millimeter (units/mm), resolution
  67  * for rotational axes (ABS_RX, ABS_RY, ABS_RZ) is reported
  68  * in units per radian.
  69  * When INPUT_PROP_ACCELEROMETER is set the resolution changes.
  70  * The main axes (ABS_X, ABS_Y, ABS_Z) are then reported in
  71  * in units per g (units/g) and in units per degree per second
  72  * (units/deg/s) for rotational axes (ABS_RX, ABS_RY, ABS_RZ).
  73  */
  74 struct input_absinfo {
  75         __s32 value;
  76         __s32 minimum;
  77         __s32 maximum;
  78         __s32 fuzz;
  79         __s32 flat;
  80         __s32 resolution;
  81 };
  82
  83 /**
  84  * struct input_keymap_entry - used by EVIOCGKEYCODE/EVIOCSKEYCODE ioctls
  85  * @scancode: scancode represented in machine-endian form.
  86  * @len: length of the scancode that resides in @scancode buffer.
  87  * @index: index in the keymap, may be used instead of scancode
  88  * @flags: allows to specify how kernel should handle the request. For
  89  *      example, setting INPUT_KEYMAP_BY_INDEX flag indicates that kernel
  90  *      should perform lookup in keymap by @index instead of @scancode
  91  * @keycode: key code assigned to this scancode
  92  *
  93  * The structure is used to retrieve and modify keymap data. Users have
  94  * option of performing lookup either by @scancode itself or by @index
  95  * in keymap entry. EVIOCGKEYCODE will also return scancode or index
  96  * (depending on which element was used to perform lookup).
  97  */
  98 struct input_keymap_entry {
  99 #define INPUT_KEYMAP_BY_INDEX   (1 << 0)
 100         __u8  flags;
 101         __u8  len;
 102         __u16 index;
 103         __u32 keycode;
 104         __u8  scancode[32];
 105 };
 106
 107 struct input_mask {
 108         __u32 type;
 109         __u32 codes_size;
 110         __u64 codes_ptr;
 111 };
 112
 113 #define EVIOCGVERSION           _IOR('E', 0x01, int)                    /* get driver version */
 114 #define EVIOCGID                _IOR('E', 0x02, struct input_id)        /* get device ID */
 115 #define EVIOCGREP               _IOR('E', 0x03, unsigned int[2])        /* get repeat settings */
 116 #define EVIOCSREP               _IOW('E', 0x03, unsigned int[2])        /* set repeat settings */
 117
 118 #define EVIOCGKEYCODE           _IOR('E', 0x04, unsigned int[2])        /* get keycode */
 119 #define EVIOCGKEYCODE_V2        _IOR('E', 0x04, struct input_keymap_entry)
 120 #define EVIOCSKEYCODE           _IOW('E', 0x04, unsigned int[2])        /* set keycode */
 121 #define EVIOCSKEYCODE_V2        _IOW('E', 0x04, struct input_keymap_entry)
 122
 123 #define EVIOCGNAME(len)         _IOC(_IOC_READ, 'E', 0x06, len)         /* get device name */
 124 #define EVIOCGPHYS(len)         _IOC(_IOC_READ, 'E', 0x07, len)         /* get physical location */
 125 #define EVIOCGUNIQ(len)         _IOC(_IOC_READ, 'E', 0x08, len)         /* get unique identifier */
 126 #define EVIOCGPROP(len)         _IOC(_IOC_READ, 'E', 0x09, len)         /* get device properties */
 127
 128 /**
 129  * EVIOCGMTSLOTS(len) - get MT slot values
 130  * @len: size of the data buffer in bytes
 131  *
 132  * The ioctl buffer argument should be binary equivalent to
 133  *
 134  * struct input_mt_request_layout {
 135  *      __u32 code;
 136  *      __s32 values[num_slots];
 137  * };
 138  *
 139  * where num_slots is the (arbitrary) number of MT slots to extract.
 140  *
 141  * The ioctl size argument (len) is the size of the buffer, which
 142  * should satisfy len = (num_slots + 1) * sizeof(__s32).  If len is
 143  * too small to fit all available slots, the first num_slots are
 144  * returned.
 145  *
 146  * Before the call, code is set to the wanted ABS_MT event type. On
 147  * return, values[] is filled with the slot values for the specified
 148  * ABS_MT code.
 149  *
 150  * If the request code is not an ABS_MT value, -EINVAL is returned.
 151  */
 152 #define EVIOCGMTSLOTS(len)      _IOC(_IOC_READ, 'E', 0x0a, len)
 153
 154 #define EVIOCGKEY(len)          _IOC(_IOC_READ, 'E', 0x18, len)         /* get global key state */
 155 #define EVIOCGLED(len)          _IOC(_IOC_READ, 'E', 0x19, len)         /* get all LEDs */
 156 #define EVIOCGSND(len)          _IOC(_IOC_READ, 'E', 0x1a, len)         /* get all sounds status */
 157 #define EVIOCGSW(len)           _IOC(_IOC_READ, 'E', 0x1b, len)         /* get all switch states */
 158
 159 #define EVIOCGBIT(ev,len)       _IOC(_IOC_READ, 'E', 0x20 + (ev), len)  /* get event bits */
 160 #define EVIOCGABS(abs)          _IOR('E', 0x40 + (abs), struct input_absinfo)   /* get abs value/limits */
 161 #define EVIOCSABS(abs)          _IOW('E', 0xc0 + (abs), struct input_absinfo)   /* set abs value/limits */
 162
 163 #define EVIOCSFF                _IOW('E', 0x80, struct ff_effect)       /* send a force effect to a force feedback device */
 164 #define EVIOCRMFF               _IOW('E', 0x81, int)                    /* Erase a force effect */
 165 #define EVIOCGEFFECTS           _IOR('E', 0x84, int)                    /* Report number of effects playable at the same time */
 166
 167 #define EVIOCGRAB               _IOW('E', 0x90, int)                    /* Grab/Release device */
 168 #define EVIOCREVOKE             _IOW('E', 0x91, int)                    /* Revoke device access */
 169
 170 /**
 171  * EVIOCGMASK - Retrieve current event mask
 172  *
 173  * This ioctl allows user to retrieve the current event mask for specific
 174  * event type. The argument must be of type "struct input_mask" and
 175  * specifies the event type to query, the address of the receive buffer and
 176  * the size of the receive buffer.
 177  *
 178  * The event mask is a per-client mask that specifies which events are
 179  * forwarded to the client. Each event code is represented by a single bit
 180  * in the event mask. If the bit is set, the event is passed to the client
 181  * normally. Otherwise, the event is filtered and will never be queued on
 182  * the client's receive buffer.
 183  *
 184  * Event masks do not affect global state of the input device. They only
 185  * affect the file descriptor they are applied to.
 186  *
 187  * The default event mask for a client has all bits set, i.e. all events
 188  * are forwarded to the client. If the kernel is queried for an unknown
 189  * event type or if the receive buffer is larger than the number of
 190  * event codes known to the kernel, the kernel returns all zeroes for those
 191  * codes.
 192  *
 193  * At maximum, codes_size bytes are copied.
 194  *
 195  * This ioctl may fail with ENODEV in case the file is revoked, EFAULT
 196  * if the receive-buffer points to invalid memory, or EINVAL if the kernel
 197  * does not implement the ioctl.
 198  */
 199 #define EVIOCGMASK              _IOR('E', 0x92, struct input_mask)      /* Get event-masks */
 200
 201 /**
 202  * EVIOCSMASK - Set event mask
 203  *
 204  * This ioctl is the counterpart to EVIOCGMASK. Instead of receiving the
 205  * current event mask, this changes the client's event mask for a specific
 206  * type.  See EVIOCGMASK for a description of event-masks and the
 207  * argument-type.
 208  *
 209  * This ioctl provides full forward compatibility. If the passed event type
 210  * is unknown to the kernel, or if the number of event codes specified in
 211  * the mask is bigger than what is known to the kernel, the ioctl is still
 212  * accepted and applied. However, any unknown codes are left untouched and
 213  * stay cleared. That means, the kernel always filters unknown codes
 214  * regardless of what the client requests.  If the new mask doesn't cover
 215  * all known event-codes, all remaining codes are automatically cleared and
 216  * thus filtered.
 217  *
 218  * This ioctl may fail with ENODEV in case the file is revoked. EFAULT is
 219  * returned if the receive-buffer points to invalid memory. EINVAL is returned
 220  * if the kernel does not implement the ioctl.
 221  */
 222 #define EVIOCSMASK              _IOW('E', 0x93, struct input_mask)      /* Set event-masks */
 223
 224 #define EVIOCSCLOCKID           _IOW('E', 0xa0, int)                    /* Set clockid to be used for timestamps */
 225
 226 /*
 227  * IDs.
 228  */
 229
 230 #define ID_BUS                  0
 231 #define ID_VENDOR               1
 232 #define ID_PRODUCT              2
 233 #define ID_VERSION              3
 234
 235 #define BUS_PCI                 0x01
 236 #define BUS_ISAPNP              0x02
 237 #define BUS_USB                 0x03
 238 #define BUS_HIL                 0x04
 239 #define BUS_BLUETOOTH           0x05
 240 #define BUS_VIRTUAL             0x06
 241
 242 #define BUS_ISA                 0x10
 243 #define BUS_I8042               0x11
 244 #define BUS_XTKBD               0x12
 245 #define BUS_RS232               0x13
 246 #define BUS_GAMEPORT            0x14
 247 #define BUS_PARPORT             0x15
 248 #define BUS_AMIGA               0x16
 249 #define BUS_ADB                 0x17
 250 #define BUS_I2C                 0x18
 251 #define BUS_HOST                0x19
 252 #define BUS_GSC                 0x1A
 253 #define BUS_ATARI               0x1B
 254 #define BUS_SPI                 0x1C
 255 #define BUS_RMI                 0x1D
 256 #define BUS_CEC                 0x1E
 257 #define BUS_INTEL_ISHTP         0x1F
 258
 259 /*
 260  * MT_TOOL types
 261  */
 262 #define MT_TOOL_FINGER          0
 263 #define MT_TOOL_PEN             1
 264 #define MT_TOOL_PALM            2
 265 #define MT_TOOL_MAX             2
 266
 267 /*
 268  * Values describing the status of a force-feedback effect
 269  */
 270 #define FF_STATUS_STOPPED       0x00
 271 #define FF_STATUS_PLAYING       0x01
 272 #define FF_STATUS_MAX           0x01
 273
 274 /*
 275  * Structures used in ioctls to upload effects to a device
 276  * They are pieces of a bigger structure (called ff_effect)
 277  */
 278
 279 /*
 280  * All duration values are expressed in ms. Values above 32767 ms (0x7fff)
 281  * should not be used and have unspecified results.
 282  */
 283
 284 /**
 285  * struct ff_replay - defines scheduling of the force-feedback effect
 286  * @length: duration of the effect
 287  * @delay: delay before effect should start playing
 288  */
 289 struct ff_replay {
 290         __u16 length;
 291         __u16 delay;
 292 };
 293
 294 /**
 295  * struct ff_trigger - defines what triggers the force-feedback effect
 296  * @button: number of the button triggering the effect
 297  * @interval: controls how soon the effect can be re-triggered
 298  */
 299 struct ff_trigger {
 300         __u16 button;
 301         __u16 interval;
 302 };
 303
 304 /**
 305  * struct ff_envelope - generic force-feedback effect envelope
 306  * @attack_length: duration of the attack (ms)
 307  * @attack_level: level at the beginning of the attack
 308  * @fade_length: duration of fade (ms)
 309  * @fade_level: level at the end of fade
 310  *
 311  * The @attack_level and @fade_level are absolute values; when applying
 312  * envelope force-feedback core will convert to positive/negative
 313  * value based on polarity of the default level of the effect.
 314  * Valid range for the attack and fade levels is 0x0000 - 0x7fff
 315  */
 316 struct ff_envelope {
 317         __u16 attack_length;
 318         __u16 attack_level;
 319         __u16 fade_length;
 320         __u16 fade_level;
 321 };
 322
 323 /**
 324  * struct ff_constant_effect - defines parameters of a constant force-feedback effect
 325  * @level: strength of the effect; may be negative
 326  * @envelope: envelope data
 327  */
 328 struct ff_constant_effect {
 329         __s16 level;
 330         struct ff_envelope envelope;
 331 };
 332
 333 /**
 334  * struct ff_ramp_effect - defines parameters of a ramp force-feedback effect
 335  * @start_level: beginning strength of the effect; may be negative
 336  * @end_level: final strength of the effect; may be negative
 337  * @envelope: envelope data
 338  */
 339 struct ff_ramp_effect {
 340         __s16 start_level;
 341         __s16 end_level;
 342         struct ff_envelope envelope;
 343 };
 344
 345 /**
 346  * struct ff_condition_effect - defines a spring or friction force-feedback effect
 347  * @right_saturation: maximum level when joystick moved all way to the right
 348  * @left_saturation: same for the left side
 349  * @right_coeff: controls how fast the force grows when the joystick moves
 350  *      to the right
 351  * @left_coeff: same for the left side
 352  * @deadband: size of the dead zone, where no force is produced
 353  * @center: position of the dead zone
 354  */
 355 struct ff_condition_effect {
 356         __u16 right_saturation;
 357         __u16 left_saturation;
 358
 359         __s16 right_coeff;
 360         __s16 left_coeff;
 361
 362         __u16 deadband;
 363         __s16 center;
 364 };
 365
 366 /**
 367  * struct ff_periodic_effect - defines parameters of a periodic force-feedback effect
 368  * @waveform: kind of the effect (wave)
 369  * @period: period of the wave (ms)
 370  * @magnitude: peak value
 371  * @offset: mean value of the wave (roughly)
 372  * @phase: 'horizontal' shift
 373  * @envelope: envelope data
 374  * @custom_len: number of samples (FF_CUSTOM only)
 375  * @custom_data: buffer of samples (FF_CUSTOM only)
 376  *
 377  * Known waveforms - FF_SQUARE, FF_TRIANGLE, FF_SINE, FF_SAW_UP,
 378  * FF_SAW_DOWN, FF_CUSTOM. The exact syntax FF_CUSTOM is undefined
 379  * for the time being as no driver supports it yet.
 380  *
 381  * Note: the data pointed by custom_data is copied by the driver.
 382  * You can therefore dispose of the memory after the upload/update.
 383  */
 384 struct ff_periodic_effect {
 385         __u16 waveform;
 386         __u16 period;
 387         __s16 magnitude;
 388         __s16 offset;
 389         __u16 phase;
 390
 391         struct ff_envelope envelope;
 392
 393         __u32 custom_len;
 394         __s16 __user *custom_data;
 395 };
 396
 397 /**
 398  * struct ff_rumble_effect - defines parameters of a periodic force-feedback effect
 399  * @strong_magnitude: magnitude of the heavy motor
 400  * @weak_magnitude: magnitude of the light one
 401  *
 402  * Some rumble pads have two motors of different weight. Strong_magnitude
 403  * represents the magnitude of the vibration generated by the heavy one.
 404  */
 405 struct ff_rumble_effect {
 406         __u16 strong_magnitude;
 407         __u16 weak_magnitude;
 408 };
 409
 410 /**
 411  * struct ff_effect - defines force feedback effect
 412  * @type: type of the effect (FF_CONSTANT, FF_PERIODIC, FF_RAMP, FF_SPRING,
 413  *      FF_FRICTION, FF_DAMPER, FF_RUMBLE, FF_INERTIA, or FF_CUSTOM)
 414  * @id: an unique id assigned to an effect
 415  * @direction: direction of the effect
 416  * @trigger: trigger conditions (struct ff_trigger)
 417  * @replay: scheduling of the effect (struct ff_replay)
 418  * @u: effect-specific structure (one of ff_constant_effect, ff_ramp_effect,
 419  *      ff_periodic_effect, ff_condition_effect, ff_rumble_effect) further
 420  *      defining effect parameters
 421  *
 422  * This structure is sent through ioctl from the application to the driver.
 423  * To create a new effect application should set its @id to -1; the kernel
 424  * will return assigned @id which can later be used to update or delete
 425  * this effect.
 426  *
 427  * Direction of the effect is encoded as follows:
 428  *      0 deg -> 0x0000 (down)
 429  *      90 deg -> 0x4000 (left)
 430  *      180 deg -> 0x8000 (up)
 431  *      270 deg -> 0xC000 (right)
 432  */
 433 struct ff_effect {
 434         __u16 type;
 435         __s16 id;
 436         __u16 direction;
 437         struct ff_trigger trigger;
 438         struct ff_replay replay;
 439
 440         union {
 441                 struct ff_constant_effect constant;
 442                 struct ff_ramp_effect ramp;
 443                 struct ff_periodic_effect periodic;
 444                 struct ff_condition_effect condition[2]; /* One for each axis */
 445                 struct ff_rumble_effect rumble;
 446         } u;
 447 };
 448
 449 /*
 450  * Force feedback effect types
 451  */
 452
 453 #define FF_RUMBLE       0x50
 454 #define FF_PERIODIC     0x51
 455 #define FF_CONSTANT     0x52
 456 #define FF_SPRING       0x53
 457 #define FF_FRICTION     0x54
 458 #define FF_DAMPER       0x55
 459 #define FF_INERTIA      0x56
 460 #define FF_RAMP         0x57
 461
 462 #define FF_EFFECT_MIN   FF_RUMBLE
 463 #define FF_EFFECT_MAX   FF_RAMP
 464
 465 /*
 466  * Force feedback periodic effect types
 467  */
 468
 469 #define FF_SQUARE       0x58
 470 #define FF_TRIANGLE     0x59
 471 #define FF_SINE         0x5a
 472 #define FF_SAW_UP       0x5b
 473 #define FF_SAW_DOWN     0x5c
 474 #define FF_CUSTOM       0x5d
 475
 476 #define FF_WAVEFORM_MIN FF_SQUARE
 477 #define FF_WAVEFORM_MAX FF_CUSTOM
 478
 479 /*
 480  * Set ff device properties
 481  */
 482
 483 #define FF_GAIN         0x60
 484 #define FF_AUTOCENTER   0x61
 485
 486 /*
 487  * ff->playback(effect_id = FF_GAIN) is the first effect_id to
 488  * cause a collision with another ff method, in this case ff->set_gain().
 489  * Therefore the greatest safe value for effect_id is FF_GAIN - 1,
 490  * and thus the total number of effects should never exceed FF_GAIN.
 491  */
 492 #define FF_MAX_EFFECTS  FF_GAIN
 493
 494 #define FF_MAX          0x7f
 495 #define FF_CNT          (FF_MAX+1)
 496
 497 #endif /* _UAPI_INPUT_H */