include/standard-headers/linux/input.h

   1 /*
   2  * Copyright (c) 1999-2002 Vojtech Pavlik
   3  *
   4  * This program is free software; you can redistribute it and/or modify it
   5  * under the terms of the GNU General Public License version 2 as published by
   6  * the Free Software Foundation.
   7  */
   8 #ifndef _INPUT_H
   9 #define _INPUT_H
  10
  11
  12 #include <sys/time.h>
  13 #include <sys/types.h>
  14 #include "standard-headers/linux/types.h"
  15
  16 #include "standard-headers/linux/input-event-codes.h"
  17
  18 /*
  19  * The event structure itself
  20  */
  21
  22 struct input_event {
  23         struct timeval time;
  24         uint16_t type;
  25         uint16_t code;
  26         int32_t value;
  27 };
  28
  29 /*
  30  * Protocol version.
  31  */
  32
  33 #define EV_VERSION              0x010001
  34
  35 /*
  36  * IOCTLs (0x00 - 0x7f)
  37  */
  38
  39 struct input_id {
  40         uint16_t bustype;
  41         uint16_t vendor;
  42         uint16_t product;
  43         uint16_t version;
  44 };
  45
  46 /**
  47  * struct input_absinfo - used by EVIOCGABS/EVIOCSABS ioctls
  48  * @value: latest reported value for the axis.
  49  * @minimum: specifies minimum value for the axis.
  50  * @maximum: specifies maximum value for the axis.
  51  * @fuzz: specifies fuzz value that is used to filter noise from
  52  *      the event stream.
  53  * @flat: values that are within this value will be discarded by
  54  *      joydev interface and reported as 0 instead.
  55  * @resolution: specifies resolution for the values reported for
  56  *      the axis.
  57  *
  58  * Note that input core does not clamp reported values to the
  59  * [minimum, maximum] limits, such task is left to userspace.
  60  *
  61  * The default resolution for main axes (ABS_X, ABS_Y, ABS_Z)
  62  * is reported in units per millimeter (units/mm), resolution
  63  * for rotational axes (ABS_RX, ABS_RY, ABS_RZ) is reported
  64  * in units per radian.
  65  * When INPUT_PROP_ACCELEROMETER is set the resolution changes.
  66  * The main axes (ABS_X, ABS_Y, ABS_Z) are then reported in
  67  * in units per g (units/g) and in units per degree per second
  68  * (units/deg/s) for rotational axes (ABS_RX, ABS_RY, ABS_RZ).
  69  */
  70 struct input_absinfo {
  71         int32_t value;
  72         int32_t minimum;
  73         int32_t maximum;
  74         int32_t fuzz;
  75         int32_t flat;
  76         int32_t resolution;
  77 };
  78
  79 /**
  80  * struct input_keymap_entry - used by EVIOCGKEYCODE/EVIOCSKEYCODE ioctls
  81  * @scancode: scancode represented in machine-endian form.
  82  * @len: length of the scancode that resides in @scancode buffer.
  83  * @index: index in the keymap, may be used instead of scancode
  84  * @flags: allows to specify how kernel should handle the request. For
  85  *      example, setting INPUT_KEYMAP_BY_INDEX flag indicates that kernel
  86  *      should perform lookup in keymap by @index instead of @scancode
  87  * @keycode: key code assigned to this scancode
  88  *
  89  * The structure is used to retrieve and modify keymap data. Users have
  90  * option of performing lookup either by @scancode itself or by @index
  91  * in keymap entry. EVIOCGKEYCODE will also return scancode or index
  92  * (depending on which element was used to perform lookup).
  93  */
  94 struct input_keymap_entry {
  95 #define INPUT_KEYMAP_BY_INDEX   (1 << 0)
  96         uint8_t  flags;
  97         uint8_t  len;
  98         uint16_t index;
  99         uint32_t keycode;
 100         uint8_t  scancode[32];
 101 };
 102
 103 struct input_mask {
 104         uint32_t type;
 105         uint32_t codes_size;
 106         uint64_t codes_ptr;
 107 };
 108
 109 #define EVIOCGVERSION           _IOR('E', 0x01, int)                    /* get driver version */
 110 #define EVIOCGID                _IOR('E', 0x02, struct input_id)        /* get device ID */
 111 #define EVIOCGREP               _IOR('E', 0x03, unsigned int[2])        /* get repeat settings */
 112 #define EVIOCSREP               _IOW('E', 0x03, unsigned int[2])        /* set repeat settings */
 113
 114 #define EVIOCGKEYCODE           _IOR('E', 0x04, unsigned int[2])        /* get keycode */
 115 #define EVIOCGKEYCODE_V2        _IOR('E', 0x04, struct input_keymap_entry)
 116 #define EVIOCSKEYCODE           _IOW('E', 0x04, unsigned int[2])        /* set keycode */
 117 #define EVIOCSKEYCODE_V2        _IOW('E', 0x04, struct input_keymap_entry)
 118
 119 #define EVIOCGNAME(len)         _IOC(_IOC_READ, 'E', 0x06, len)         /* get device name */
 120 #define EVIOCGPHYS(len)         _IOC(_IOC_READ, 'E', 0x07, len)         /* get physical location */
 121 #define EVIOCGUNIQ(len)         _IOC(_IOC_READ, 'E', 0x08, len)         /* get unique identifier */
 122 #define EVIOCGPROP(len)         _IOC(_IOC_READ, 'E', 0x09, len)         /* get device properties */
 123
 124 /**
 125  * EVIOCGMTSLOTS(len) - get MT slot values
 126  * @len: size of the data buffer in bytes
 127  *
 128  * The ioctl buffer argument should be binary equivalent to
 129  *
 130  * struct input_mt_request_layout {
 131  *      uint32_t code;
 132  *      int32_t values[num_slots];
 133  * };
 134  *
 135  * where num_slots is the (arbitrary) number of MT slots to extract.
 136  *
 137  * The ioctl size argument (len) is the size of the buffer, which
 138  * should satisfy len = (num_slots + 1) * sizeof(int32_t).  If len is
 139  * too small to fit all available slots, the first num_slots are
 140  * returned.
 141  *
 142  * Before the call, code is set to the wanted ABS_MT event type. On
 143  * return, values[] is filled with the slot values for the specified
 144  * ABS_MT code.
 145  *
 146  * If the request code is not an ABS_MT value, -EINVAL is returned.
 147  */
 148 #define EVIOCGMTSLOTS(len)      _IOC(_IOC_READ, 'E', 0x0a, len)
 149
 150 #define EVIOCGKEY(len)          _IOC(_IOC_READ, 'E', 0x18, len)         /* get global key state */
 151 #define EVIOCGLED(len)          _IOC(_IOC_READ, 'E', 0x19, len)         /* get all LEDs */
 152 #define EVIOCGSND(len)          _IOC(_IOC_READ, 'E', 0x1a, len)         /* get all sounds status */
 153 #define EVIOCGSW(len)           _IOC(_IOC_READ, 'E', 0x1b, len)         /* get all switch states */
 154
 155 #define EVIOCGBIT(ev,len)       _IOC(_IOC_READ, 'E', 0x20 + (ev), len)  /* get event bits */
 156 #define EVIOCGABS(abs)          _IOR('E', 0x40 + (abs), struct input_absinfo)   /* get abs value/limits */
 157 #define EVIOCSABS(abs)          _IOW('E', 0xc0 + (abs), struct input_absinfo)   /* set abs value/limits */
 158
 159 #define EVIOCSFF                _IOW('E', 0x80, struct ff_effect)       /* send a force effect to a force feedback device */
 160 #define EVIOCRMFF               _IOW('E', 0x81, int)                    /* Erase a force effect */
 161 #define EVIOCGEFFECTS           _IOR('E', 0x84, int)                    /* Report number of effects playable at the same time */
 162
 163 #define EVIOCGRAB               _IOW('E', 0x90, int)                    /* Grab/Release device */
 164 #define EVIOCREVOKE             _IOW('E', 0x91, int)                    /* Revoke device access */
 165
 166 /**
 167  * EVIOCGMASK - Retrieve current event mask
 168  *
 169  * This ioctl allows user to retrieve the current event mask for specific
 170  * event type. The argument must be of type "struct input_mask" and
 171  * specifies the event type to query, the address of the receive buffer and
 172  * the size of the receive buffer.
 173  *
 174  * The event mask is a per-client mask that specifies which events are
 175  * forwarded to the client. Each event code is represented by a single bit
 176  * in the event mask. If the bit is set, the event is passed to the client
 177  * normally. Otherwise, the event is filtered and will never be queued on
 178  * the client's receive buffer.
 179  *
 180  * Event masks do not affect global state of the input device. They only
 181  * affect the file descriptor they are applied to.
 182  *
 183  * The default event mask for a client has all bits set, i.e. all events
 184  * are forwarded to the client. If the kernel is queried for an unknown
 185  * event type or if the receive buffer is larger than the number of
 186  * event codes known to the kernel, the kernel returns all zeroes for those
 187  * codes.
 188  *
 189  * At maximum, codes_size bytes are copied.
 190  *
 191  * This ioctl may fail with ENODEV in case the file is revoked, EFAULT
 192  * if the receive-buffer points to invalid memory, or EINVAL if the kernel
 193  * does not implement the ioctl.
 194  */
 195 #define EVIOCGMASK              _IOR('E', 0x92, struct input_mask)      /* Get event-masks */
 196
 197 /**
 198  * EVIOCSMASK - Set event mask
 199  *
 200  * This ioctl is the counterpart to EVIOCGMASK. Instead of receiving the
 201  * current event mask, this changes the client's event mask for a specific
 202  * type.  See EVIOCGMASK for a description of event-masks and the
 203  * argument-type.
 204  *
 205  * This ioctl provides full forward compatibility. If the passed event type
 206  * is unknown to the kernel, or if the number of event codes specified in
 207  * the mask is bigger than what is known to the kernel, the ioctl is still
 208  * accepted and applied. However, any unknown codes are left untouched and
 209  * stay cleared. That means, the kernel always filters unknown codes
 210  * regardless of what the client requests.  If the new mask doesn't cover
 211  * all known event-codes, all remaining codes are automatically cleared and
 212  * thus filtered.
 213  *
 214  * This ioctl may fail with ENODEV in case the file is revoked. EFAULT is
 215  * returned if the receive-buffer points to invalid memory. EINVAL is returned
 216  * if the kernel does not implement the ioctl.
 217  */
 218 #define EVIOCSMASK              _IOW('E', 0x93, struct input_mask)      /* Set event-masks */
 219
 220 #define EVIOCSCLOCKID           _IOW('E', 0xa0, int)                    /* Set clockid to be used for timestamps */
 221
 222 /*
 223  * IDs.
 224  */
 225
 226 #define ID_BUS                  0
 227 #define ID_VENDOR               1
 228 #define ID_PRODUCT              2
 229 #define ID_VERSION              3
 230
 231 #define BUS_PCI                 0x01
 232 #define BUS_ISAPNP              0x02
 233 #define BUS_USB                 0x03
 234 #define BUS_HIL                 0x04
 235 #define BUS_BLUETOOTH           0x05
 236 #define BUS_VIRTUAL             0x06
 237
 238 #define BUS_ISA                 0x10
 239 #define BUS_I8042               0x11
 240 #define BUS_XTKBD               0x12
 241 #define BUS_RS232               0x13
 242 #define BUS_GAMEPORT            0x14
 243 #define BUS_PARPORT             0x15
 244 #define BUS_AMIGA               0x16
 245 #define BUS_ADB                 0x17
 246 #define BUS_I2C                 0x18
 247 #define BUS_HOST                0x19
 248 #define BUS_GSC                 0x1A
 249 #define BUS_ATARI               0x1B
 250 #define BUS_SPI                 0x1C
 251 #define BUS_RMI                 0x1D
 252 #define BUS_CEC                 0x1E
 253 #define BUS_INTEL_ISHTP         0x1F
 254
 255 /*
 256  * MT_TOOL types
 257  */
 258 #define MT_TOOL_FINGER          0
 259 #define MT_TOOL_PEN             1
 260 #define MT_TOOL_PALM            2
 261 #define MT_TOOL_MAX             2
 262
 263 /*
 264  * Values describing the status of a force-feedback effect
 265  */
 266 #define FF_STATUS_STOPPED       0x00
 267 #define FF_STATUS_PLAYING       0x01
 268 #define FF_STATUS_MAX           0x01
 269
 270 /*
 271  * Structures used in ioctls to upload effects to a device
 272  * They are pieces of a bigger structure (called ff_effect)
 273  */
 274
 275 /*
 276  * All duration values are expressed in ms. Values above 32767 ms (0x7fff)
 277  * should not be used and have unspecified results.
 278  */
 279
 280 /**
 281  * struct ff_replay - defines scheduling of the force-feedback effect
 282  * @length: duration of the effect
 283  * @delay: delay before effect should start playing
 284  */
 285 struct ff_replay {
 286         uint16_t length;
 287         uint16_t delay;
 288 };
 289
 290 /**
 291  * struct ff_trigger - defines what triggers the force-feedback effect
 292  * @button: number of the button triggering the effect
 293  * @interval: controls how soon the effect can be re-triggered
 294  */
 295 struct ff_trigger {
 296         uint16_t button;
 297         uint16_t interval;
 298 };
 299
 300 /**
 301  * struct ff_envelope - generic force-feedback effect envelope
 302  * @attack_length: duration of the attack (ms)
 303  * @attack_level: level at the beginning of the attack
 304  * @fade_length: duration of fade (ms)
 305  * @fade_level: level at the end of fade
 306  *
 307  * The @attack_level and @fade_level are absolute values; when applying
 308  * envelope force-feedback core will convert to positive/negative
 309  * value based on polarity of the default level of the effect.
 310  * Valid range for the attack and fade levels is 0x0000 - 0x7fff
 311  */
 312 struct ff_envelope {
 313         uint16_t attack_length;
 314         uint16_t attack_level;
 315         uint16_t fade_length;
 316         uint16_t fade_level;
 317 };
 318
 319 /**
 320  * struct ff_constant_effect - defines parameters of a constant force-feedback effect
 321  * @level: strength of the effect; may be negative
 322  * @envelope: envelope data
 323  */
 324 struct ff_constant_effect {
 325         int16_t level;
 326         struct ff_envelope envelope;
 327 };
 328
 329 /**
 330  * struct ff_ramp_effect - defines parameters of a ramp force-feedback effect
 331  * @start_level: beginning strength of the effect; may be negative
 332  * @end_level: final strength of the effect; may be negative
 333  * @envelope: envelope data
 334  */
 335 struct ff_ramp_effect {
 336         int16_t start_level;
 337         int16_t end_level;
 338         struct ff_envelope envelope;
 339 };
 340
 341 /**
 342  * struct ff_condition_effect - defines a spring or friction force-feedback effect
 343  * @right_saturation: maximum level when joystick moved all way to the right
 344  * @left_saturation: same for the left side
 345  * @right_coeff: controls how fast the force grows when the joystick moves
 346  *      to the right
 347  * @left_coeff: same for the left side
 348  * @deadband: size of the dead zone, where no force is produced
 349  * @center: position of the dead zone
 350  */
 351 struct ff_condition_effect {
 352         uint16_t right_saturation;
 353         uint16_t left_saturation;
 354
 355         int16_t right_coeff;
 356         int16_t left_coeff;
 357
 358         uint16_t deadband;
 359         int16_t center;
 360 };
 361
 362 /**
 363  * struct ff_periodic_effect - defines parameters of a periodic force-feedback effect
 364  * @waveform: kind of the effect (wave)
 365  * @period: period of the wave (ms)
 366  * @magnitude: peak value
 367  * @offset: mean value of the wave (roughly)
 368  * @phase: 'horizontal' shift
 369  * @envelope: envelope data
 370  * @custom_len: number of samples (FF_CUSTOM only)
 371  * @custom_data: buffer of samples (FF_CUSTOM only)
 372  *
 373  * Known waveforms - FF_SQUARE, FF_TRIANGLE, FF_SINE, FF_SAW_UP,
 374  * FF_SAW_DOWN, FF_CUSTOM. The exact syntax FF_CUSTOM is undefined
 375  * for the time being as no driver supports it yet.
 376  *
 377  * Note: the data pointed by custom_data is copied by the driver.
 378  * You can therefore dispose of the memory after the upload/update.
 379  */
 380 struct ff_periodic_effect {
 381         uint16_t waveform;
 382         uint16_t period;
 383         int16_t magnitude;
 384         int16_t offset;
 385         uint16_t phase;
 386
 387         struct ff_envelope envelope;
 388
 389         uint32_t custom_len;
 390         int16_t *custom_data;
 391 };
 392
 393 /**
 394  * struct ff_rumble_effect - defines parameters of a periodic force-feedback effect
 395  * @strong_magnitude: magnitude of the heavy motor
 396  * @weak_magnitude: magnitude of the light one
 397  *
 398  * Some rumble pads have two motors of different weight. Strong_magnitude
 399  * represents the magnitude of the vibration generated by the heavy one.
 400  */
 401 struct ff_rumble_effect {
 402         uint16_t strong_magnitude;
 403         uint16_t weak_magnitude;
 404 };
 405
 406 /**
 407  * struct ff_effect - defines force feedback effect
 408  * @type: type of the effect (FF_CONSTANT, FF_PERIODIC, FF_RAMP, FF_SPRING,
 409  *      FF_FRICTION, FF_DAMPER, FF_RUMBLE, FF_INERTIA, or FF_CUSTOM)
 410  * @id: an unique id assigned to an effect
 411  * @direction: direction of the effect
 412  * @trigger: trigger conditions (struct ff_trigger)
 413  * @replay: scheduling of the effect (struct ff_replay)
 414  * @u: effect-specific structure (one of ff_constant_effect, ff_ramp_effect,
 415  *      ff_periodic_effect, ff_condition_effect, ff_rumble_effect) further
 416  *      defining effect parameters
 417  *
 418  * This structure is sent through ioctl from the application to the driver.
 419  * To create a new effect application should set its @id to -1; the kernel
 420  * will return assigned @id which can later be used to update or delete
 421  * this effect.
 422  *
 423  * Direction of the effect is encoded as follows:
 424  *      0 deg -> 0x0000 (down)
 425  *      90 deg -> 0x4000 (left)
 426  *      180 deg -> 0x8000 (up)
 427  *      270 deg -> 0xC000 (right)
 428  */
 429 struct ff_effect {
 430         uint16_t type;
 431         int16_t id;
 432         uint16_t direction;
 433         struct ff_trigger trigger;
 434         struct ff_replay replay;
 435
 436         union {
 437                 struct ff_constant_effect constant;
 438                 struct ff_ramp_effect ramp;
 439                 struct ff_periodic_effect periodic;
 440                 struct ff_condition_effect condition[2]; /* One for each axis */
 441                 struct ff_rumble_effect rumble;
 442         } u;
 443 };
 444
 445 /*
 446  * Force feedback effect types
 447  */
 448
 449 #define FF_RUMBLE       0x50
 450 #define FF_PERIODIC     0x51
 451 #define FF_CONSTANT     0x52
 452 #define FF_SPRING       0x53
 453 #define FF_FRICTION     0x54
 454 #define FF_DAMPER       0x55
 455 #define FF_INERTIA      0x56
 456 #define FF_RAMP         0x57
 457
 458 #define FF_EFFECT_MIN   FF_RUMBLE
 459 #define FF_EFFECT_MAX   FF_RAMP
 460
 461 /*
 462  * Force feedback periodic effect types
 463  */
 464
 465 #define FF_SQUARE       0x58
 466 #define FF_TRIANGLE     0x59
 467 #define FF_SINE         0x5a
 468 #define FF_SAW_UP       0x5b
 469 #define FF_SAW_DOWN     0x5c
 470 #define FF_CUSTOM       0x5d
 471
 472 #define FF_WAVEFORM_MIN FF_SQUARE
 473 #define FF_WAVEFORM_MAX FF_CUSTOM
 474
 475 /*
 476  * Set ff device properties
 477  */
 478
 479 #define FF_GAIN         0x60
 480 #define FF_AUTOCENTER   0x61
 481
 482 /*
 483  * ff->playback(effect_id = FF_GAIN) is the first effect_id to
 484  * cause a collision with another ff method, in this case ff->set_gain().
 485  * Therefore the greatest safe value for effect_id is FF_GAIN - 1,
 486  * and thus the total number of effects should never exceed FF_GAIN.
 487  */
 488 #define FF_MAX_EFFECTS  FF_GAIN
 489
 490 #define FF_MAX          0x7f
 491 #define FF_CNT          (FF_MAX+1)
 492
 493 #endif /* _INPUT_H */