include/standard-headers/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 _INPUT_H
  10 #define _INPUT_H
  11
  12
  13 #include <sys/time.h>
  14 #include <sys/types.h>
  15 #include "standard-headers/linux/types.h"
  16
  17 #include "standard-headers/linux/input-event-codes.h"
  18
  19 /*
  20  * The event structure itself
  21  * Note that __USE_TIME_BITS64 is defined by libc based on
  22  * application's request to use 64 bit time_t.
  23  */
  24
  25 struct input_event {
  26 #if (HOST_LONG_BITS != 32 || !defined(__USE_TIME_BITS64)) && !defined(__KERNEL)
  27         struct timeval time;
  28 #define input_event_sec time.tv_sec
  29 #define input_event_usec time.tv_usec
  30 #else
  31         unsigned long __sec;
  32         unsigned long __usec;
  33 #define input_event_sec  __sec
  34 #define input_event_usec __usec
  35 #endif
  36         uint16_t type;
  37         uint16_t code;
  38         int32_t value;
  39 };
  40
  41 /*
  42  * Protocol version.
  43  */
  44
  45 #define EV_VERSION              0x010001
  46
  47 /*
  48  * IOCTLs (0x00 - 0x7f)
  49  */
  50
  51 struct input_id {
  52         uint16_t bustype;
  53         uint16_t vendor;
  54         uint16_t product;
  55         uint16_t version;
  56 };
  57
  58 /**
  59  * struct input_absinfo - used by EVIOCGABS/EVIOCSABS ioctls
  60  * @value: latest reported value for the axis.
  61  * @minimum: specifies minimum value for the axis.
  62  * @maximum: specifies maximum value for the axis.
  63  * @fuzz: specifies fuzz value that is used to filter noise from
  64  *      the event stream.
  65  * @flat: values that are within this value will be discarded by
  66  *      joydev interface and reported as 0 instead.
  67  * @resolution: specifies resolution for the values reported for
  68  *      the axis.
  69  *
  70  * Note that input core does not clamp reported values to the
  71  * [minimum, maximum] limits, such task is left to userspace.
  72  *
  73  * The default resolution for main axes (ABS_X, ABS_Y, ABS_Z)
  74  * is reported in units per millimeter (units/mm), resolution
  75  * for rotational axes (ABS_RX, ABS_RY, ABS_RZ) is reported
  76  * in units per radian.
  77  * When INPUT_PROP_ACCELEROMETER is set the resolution changes.
  78  * The main axes (ABS_X, ABS_Y, ABS_Z) are then reported in
  79  * in units per g (units/g) and in units per degree per second
  80  * (units/deg/s) for rotational axes (ABS_RX, ABS_RY, ABS_RZ).
  81  */
  82 struct input_absinfo {
  83         int32_t value;
  84         int32_t minimum;
  85         int32_t maximum;
  86         int32_t fuzz;
  87         int32_t flat;
  88         int32_t resolution;
  89 };
  90
  91 /**
  92  * struct input_keymap_entry - used by EVIOCGKEYCODE/EVIOCSKEYCODE ioctls
  93  * @scancode: scancode represented in machine-endian form.
  94  * @len: length of the scancode that resides in @scancode buffer.
  95  * @index: index in the keymap, may be used instead of scancode
  96  * @flags: allows to specify how kernel should handle the request. For
  97  *      example, setting INPUT_KEYMAP_BY_INDEX flag indicates that kernel
  98  *      should perform lookup in keymap by @index instead of @scancode
  99  * @keycode: key code assigned to this scancode
 100  *
 101  * The structure is used to retrieve and modify keymap data. Users have
 102  * option of performing lookup either by @scancode itself or by @index
 103  * in keymap entry. EVIOCGKEYCODE will also return scancode or index
 104  * (depending on which element was used to perform lookup).
 105  */
 106 struct input_keymap_entry {
 107 #define INPUT_KEYMAP_BY_INDEX   (1 << 0)
 108         uint8_t  flags;
 109         uint8_t  len;
 110         uint16_t index;
 111         uint32_t keycode;
 112         uint8_t  scancode[32];
 113 };
 114
 115 struct input_mask {
 116         uint32_t type;
 117         uint32_t codes_size;
 118         uint64_t codes_ptr;
 119 };
 120
 121 #define EVIOCGVERSION           _IOR('E', 0x01, int)                    /* get driver version */
 122 #define EVIOCGID                _IOR('E', 0x02, struct input_id)        /* get device ID */
 123 #define EVIOCGREP               _IOR('E', 0x03, unsigned int[2])        /* get repeat settings */
 124 #define EVIOCSREP               _IOW('E', 0x03, unsigned int[2])        /* set repeat settings */
 125
 126 #define EVIOCGKEYCODE           _IOR('E', 0x04, unsigned int[2])        /* get keycode */
 127 #define EVIOCGKEYCODE_V2        _IOR('E', 0x04, struct input_keymap_entry)
 128 #define EVIOCSKEYCODE           _IOW('E', 0x04, unsigned int[2])        /* set keycode */
 129 #define EVIOCSKEYCODE_V2        _IOW('E', 0x04, struct input_keymap_entry)
 130
 131 #define EVIOCGNAME(len)         _IOC(_IOC_READ, 'E', 0x06, len)         /* get device name */
 132 #define EVIOCGPHYS(len)         _IOC(_IOC_READ, 'E', 0x07, len)         /* get physical location */
 133 #define EVIOCGUNIQ(len)         _IOC(_IOC_READ, 'E', 0x08, len)         /* get unique identifier */
 134 #define EVIOCGPROP(len)         _IOC(_IOC_READ, 'E', 0x09, len)         /* get device properties */
 135
 136 /**
 137  * EVIOCGMTSLOTS(len) - get MT slot values
 138  * @len: size of the data buffer in bytes
 139  *
 140  * The ioctl buffer argument should be binary equivalent to
 141  *
 142  * struct input_mt_request_layout {
 143  *      uint32_t code;
 144  *      int32_t values[num_slots];
 145  * };
 146  *
 147  * where num_slots is the (arbitrary) number of MT slots to extract.
 148  *
 149  * The ioctl size argument (len) is the size of the buffer, which
 150  * should satisfy len = (num_slots + 1) * sizeof(int32_t).  If len is
 151  * too small to fit all available slots, the first num_slots are
 152  * returned.
 153  *
 154  * Before the call, code is set to the wanted ABS_MT event type. On
 155  * return, values[] is filled with the slot values for the specified
 156  * ABS_MT code.
 157  *
 158  * If the request code is not an ABS_MT value, -EINVAL is returned.
 159  */
 160 #define EVIOCGMTSLOTS(len)      _IOC(_IOC_READ, 'E', 0x0a, len)
 161
 162 #define EVIOCGKEY(len)          _IOC(_IOC_READ, 'E', 0x18, len)         /* get global key state */
 163 #define EVIOCGLED(len)          _IOC(_IOC_READ, 'E', 0x19, len)         /* get all LEDs */
 164 #define EVIOCGSND(len)          _IOC(_IOC_READ, 'E', 0x1a, len)         /* get all sounds status */
 165 #define EVIOCGSW(len)           _IOC(_IOC_READ, 'E', 0x1b, len)         /* get all switch states */
 166
 167 #define EVIOCGBIT(ev,len)       _IOC(_IOC_READ, 'E', 0x20 + (ev), len)  /* get event bits */
 168 #define EVIOCGABS(abs)          _IOR('E', 0x40 + (abs), struct input_absinfo)   /* get abs value/limits */
 169 #define EVIOCSABS(abs)          _IOW('E', 0xc0 + (abs), struct input_absinfo)   /* set abs value/limits */
 170
 171 #define EVIOCSFF                _IOW('E', 0x80, struct ff_effect)       /* send a force effect to a force feedback device */
 172 #define EVIOCRMFF               _IOW('E', 0x81, int)                    /* Erase a force effect */
 173 #define EVIOCGEFFECTS           _IOR('E', 0x84, int)                    /* Report number of effects playable at the same time */
 174
 175 #define EVIOCGRAB               _IOW('E', 0x90, int)                    /* Grab/Release device */
 176 #define EVIOCREVOKE             _IOW('E', 0x91, int)                    /* Revoke device access */
 177
 178 /**
 179  * EVIOCGMASK - Retrieve current event mask
 180  *
 181  * This ioctl allows user to retrieve the current event mask for specific
 182  * event type. The argument must be of type "struct input_mask" and
 183  * specifies the event type to query, the address of the receive buffer and
 184  * the size of the receive buffer.
 185  *
 186  * The event mask is a per-client mask that specifies which events are
 187  * forwarded to the client. Each event code is represented by a single bit
 188  * in the event mask. If the bit is set, the event is passed to the client
 189  * normally. Otherwise, the event is filtered and will never be queued on
 190  * the client's receive buffer.
 191  *
 192  * Event masks do not affect global state of the input device. They only
 193  * affect the file descriptor they are applied to.
 194  *
 195  * The default event mask for a client has all bits set, i.e. all events
 196  * are forwarded to the client. If the kernel is queried for an unknown
 197  * event type or if the receive buffer is larger than the number of
 198  * event codes known to the kernel, the kernel returns all zeroes for those
 199  * codes.
 200  *
 201  * At maximum, codes_size bytes are copied.
 202  *
 203  * This ioctl may fail with ENODEV in case the file is revoked, EFAULT
 204  * if the receive-buffer points to invalid memory, or EINVAL if the kernel
 205  * does not implement the ioctl.
 206  */
 207 #define EVIOCGMASK              _IOR('E', 0x92, struct input_mask)      /* Get event-masks */
 208
 209 /**
 210  * EVIOCSMASK - Set event mask
 211  *
 212  * This ioctl is the counterpart to EVIOCGMASK. Instead of receiving the
 213  * current event mask, this changes the client's event mask for a specific
 214  * type.  See EVIOCGMASK for a description of event-masks and the
 215  * argument-type.
 216  *
 217  * This ioctl provides full forward compatibility. If the passed event type
 218  * is unknown to the kernel, or if the number of event codes specified in
 219  * the mask is bigger than what is known to the kernel, the ioctl is still
 220  * accepted and applied. However, any unknown codes are left untouched and
 221  * stay cleared. That means, the kernel always filters unknown codes
 222  * regardless of what the client requests.  If the new mask doesn't cover
 223  * all known event-codes, all remaining codes are automatically cleared and
 224  * thus filtered.
 225  *
 226  * This ioctl may fail with ENODEV in case the file is revoked. EFAULT is
 227  * returned if the receive-buffer points to invalid memory. EINVAL is returned
 228  * if the kernel does not implement the ioctl.
 229  */
 230 #define EVIOCSMASK              _IOW('E', 0x93, struct input_mask)      /* Set event-masks */
 231
 232 #define EVIOCSCLOCKID           _IOW('E', 0xa0, int)                    /* Set clockid to be used for timestamps */
 233
 234 /*
 235  * IDs.
 236  */
 237
 238 #define ID_BUS                  0
 239 #define ID_VENDOR               1
 240 #define ID_PRODUCT              2
 241 #define ID_VERSION              3
 242
 243 #define BUS_PCI                 0x01
 244 #define BUS_ISAPNP              0x02
 245 #define BUS_USB                 0x03
 246 #define BUS_HIL                 0x04
 247 #define BUS_BLUETOOTH           0x05
 248 #define BUS_VIRTUAL             0x06
 249
 250 #define BUS_ISA                 0x10
 251 #define BUS_I8042               0x11
 252 #define BUS_XTKBD               0x12
 253 #define BUS_RS232               0x13
 254 #define BUS_GAMEPORT            0x14
 255 #define BUS_PARPORT             0x15
 256 #define BUS_AMIGA               0x16
 257 #define BUS_ADB                 0x17
 258 #define BUS_I2C                 0x18
 259 #define BUS_HOST                0x19
 260 #define BUS_GSC                 0x1A
 261 #define BUS_ATARI               0x1B
 262 #define BUS_SPI                 0x1C
 263 #define BUS_RMI                 0x1D
 264 #define BUS_CEC                 0x1E
 265 #define BUS_INTEL_ISHTP         0x1F
 266
 267 /*
 268  * MT_TOOL types
 269  */
 270 #define MT_TOOL_FINGER          0x00
 271 #define MT_TOOL_PEN             0x01
 272 #define MT_TOOL_PALM            0x02
 273 #define MT_TOOL_DIAL            0x0a
 274 #define MT_TOOL_MAX             0x0f
 275
 276 /*
 277  * Values describing the status of a force-feedback effect
 278  */
 279 #define FF_STATUS_STOPPED       0x00
 280 #define FF_STATUS_PLAYING       0x01
 281 #define FF_STATUS_MAX           0x01
 282
 283 /*
 284  * Structures used in ioctls to upload effects to a device
 285  * They are pieces of a bigger structure (called ff_effect)
 286  */
 287
 288 /*
 289  * All duration values are expressed in ms. Values above 32767 ms (0x7fff)
 290  * should not be used and have unspecified results.
 291  */
 292
 293 /**
 294  * struct ff_replay - defines scheduling of the force-feedback effect
 295  * @length: duration of the effect
 296  * @delay: delay before effect should start playing
 297  */
 298 struct ff_replay {
 299         uint16_t length;
 300         uint16_t delay;
 301 };
 302
 303 /**
 304  * struct ff_trigger - defines what triggers the force-feedback effect
 305  * @button: number of the button triggering the effect
 306  * @interval: controls how soon the effect can be re-triggered
 307  */
 308 struct ff_trigger {
 309         uint16_t button;
 310         uint16_t interval;
 311 };
 312
 313 /**
 314  * struct ff_envelope - generic force-feedback effect envelope
 315  * @attack_length: duration of the attack (ms)
 316  * @attack_level: level at the beginning of the attack
 317  * @fade_length: duration of fade (ms)
 318  * @fade_level: level at the end of fade
 319  *
 320  * The @attack_level and @fade_level are absolute values; when applying
 321  * envelope force-feedback core will convert to positive/negative
 322  * value based on polarity of the default level of the effect.
 323  * Valid range for the attack and fade levels is 0x0000 - 0x7fff
 324  */
 325 struct ff_envelope {
 326         uint16_t attack_length;
 327         uint16_t attack_level;
 328         uint16_t fade_length;
 329         uint16_t fade_level;
 330 };
 331
 332 /**
 333  * struct ff_constant_effect - defines parameters of a constant force-feedback effect
 334  * @level: strength of the effect; may be negative
 335  * @envelope: envelope data
 336  */
 337 struct ff_constant_effect {
 338         int16_t level;
 339         struct ff_envelope envelope;
 340 };
 341
 342 /**
 343  * struct ff_ramp_effect - defines parameters of a ramp force-feedback effect
 344  * @start_level: beginning strength of the effect; may be negative
 345  * @end_level: final strength of the effect; may be negative
 346  * @envelope: envelope data
 347  */
 348 struct ff_ramp_effect {
 349         int16_t start_level;
 350         int16_t end_level;
 351         struct ff_envelope envelope;
 352 };
 353
 354 /**
 355  * struct ff_condition_effect - defines a spring or friction force-feedback effect
 356  * @right_saturation: maximum level when joystick moved all way to the right
 357  * @left_saturation: same for the left side
 358  * @right_coeff: controls how fast the force grows when the joystick moves
 359  *      to the right
 360  * @left_coeff: same for the left side
 361  * @deadband: size of the dead zone, where no force is produced
 362  * @center: position of the dead zone
 363  */
 364 struct ff_condition_effect {
 365         uint16_t right_saturation;
 366         uint16_t left_saturation;
 367
 368         int16_t right_coeff;
 369         int16_t left_coeff;
 370
 371         uint16_t deadband;
 372         int16_t center;
 373 };
 374
 375 /**
 376  * struct ff_periodic_effect - defines parameters of a periodic force-feedback effect
 377  * @waveform: kind of the effect (wave)
 378  * @period: period of the wave (ms)
 379  * @magnitude: peak value
 380  * @offset: mean value of the wave (roughly)
 381  * @phase: 'horizontal' shift
 382  * @envelope: envelope data
 383  * @custom_len: number of samples (FF_CUSTOM only)
 384  * @custom_data: buffer of samples (FF_CUSTOM only)
 385  *
 386  * Known waveforms - FF_SQUARE, FF_TRIANGLE, FF_SINE, FF_SAW_UP,
 387  * FF_SAW_DOWN, FF_CUSTOM. The exact syntax FF_CUSTOM is undefined
 388  * for the time being as no driver supports it yet.
 389  *
 390  * Note: the data pointed by custom_data is copied by the driver.
 391  * You can therefore dispose of the memory after the upload/update.
 392  */
 393 struct ff_periodic_effect {
 394         uint16_t waveform;
 395         uint16_t period;
 396         int16_t magnitude;
 397         int16_t offset;
 398         uint16_t phase;
 399
 400         struct ff_envelope envelope;
 401
 402         uint32_t custom_len;
 403         int16_t *custom_data;
 404 };
 405
 406 /**
 407  * struct ff_rumble_effect - defines parameters of a periodic force-feedback effect
 408  * @strong_magnitude: magnitude of the heavy motor
 409  * @weak_magnitude: magnitude of the light one
 410  *
 411  * Some rumble pads have two motors of different weight. Strong_magnitude
 412  * represents the magnitude of the vibration generated by the heavy one.
 413  */
 414 struct ff_rumble_effect {
 415         uint16_t strong_magnitude;
 416         uint16_t weak_magnitude;
 417 };
 418
 419 /**
 420  * struct ff_effect - defines force feedback effect
 421  * @type: type of the effect (FF_CONSTANT, FF_PERIODIC, FF_RAMP, FF_SPRING,
 422  *      FF_FRICTION, FF_DAMPER, FF_RUMBLE, FF_INERTIA, or FF_CUSTOM)
 423  * @id: an unique id assigned to an effect
 424  * @direction: direction of the effect
 425  * @trigger: trigger conditions (struct ff_trigger)
 426  * @replay: scheduling of the effect (struct ff_replay)
 427  * @u: effect-specific structure (one of ff_constant_effect, ff_ramp_effect,
 428  *      ff_periodic_effect, ff_condition_effect, ff_rumble_effect) further
 429  *      defining effect parameters
 430  *
 431  * This structure is sent through ioctl from the application to the driver.
 432  * To create a new effect application should set its @id to -1; the kernel
 433  * will return assigned @id which can later be used to update or delete
 434  * this effect.
 435  *
 436  * Direction of the effect is encoded as follows:
 437  *      0 deg -> 0x0000 (down)
 438  *      90 deg -> 0x4000 (left)
 439  *      180 deg -> 0x8000 (up)
 440  *      270 deg -> 0xC000 (right)
 441  */
 442 struct ff_effect {
 443         uint16_t type;
 444         int16_t id;
 445         uint16_t direction;
 446         struct ff_trigger trigger;
 447         struct ff_replay replay;
 448
 449         union {
 450                 struct ff_constant_effect constant;
 451                 struct ff_ramp_effect ramp;
 452                 struct ff_periodic_effect periodic;
 453                 struct ff_condition_effect condition[2]; /* One for each axis */
 454                 struct ff_rumble_effect rumble;
 455         } u;
 456 };
 457
 458 /*
 459  * Force feedback effect types
 460  */
 461
 462 #define FF_RUMBLE       0x50
 463 #define FF_PERIODIC     0x51
 464 #define FF_CONSTANT     0x52
 465 #define FF_SPRING       0x53
 466 #define FF_FRICTION     0x54
 467 #define FF_DAMPER       0x55
 468 #define FF_INERTIA      0x56
 469 #define FF_RAMP         0x57
 470
 471 #define FF_EFFECT_MIN   FF_RUMBLE
 472 #define FF_EFFECT_MAX   FF_RAMP
 473
 474 /*
 475  * Force feedback periodic effect types
 476  */
 477
 478 #define FF_SQUARE       0x58
 479 #define FF_TRIANGLE     0x59
 480 #define FF_SINE         0x5a
 481 #define FF_SAW_UP       0x5b
 482 #define FF_SAW_DOWN     0x5c
 483 #define FF_CUSTOM       0x5d
 484
 485 #define FF_WAVEFORM_MIN FF_SQUARE
 486 #define FF_WAVEFORM_MAX FF_CUSTOM
 487
 488 /*
 489  * Set ff device properties
 490  */
 491
 492 #define FF_GAIN         0x60
 493 #define FF_AUTOCENTER   0x61
 494
 495 /*
 496  * ff->playback(effect_id = FF_GAIN) is the first effect_id to
 497  * cause a collision with another ff method, in this case ff->set_gain().
 498  * Therefore the greatest safe value for effect_id is FF_GAIN - 1,
 499  * and thus the total number of effects should never exceed FF_GAIN.
 500  */
 501 #define FF_MAX_EFFECTS  FF_GAIN
 502
 503 #define FF_MAX          0x7f
 504 #define FF_CNT          (FF_MAX+1)
 505
 506 #endif /* _INPUT_H */