src/evdev.c

   1 /*
   2  * Copyright © 2010 Intel Corporation
   3  * Copyright © 2013 Jonas Ådahl
   4  *
   5  * Permission to use, copy, modify, distribute, and sell this software and
   6  * its documentation for any purpose is hereby granted without fee, provided
   7  * that the above copyright notice appear in all copies and that both that
   8  * copyright notice and this permission notice appear in supporting
   9  * documentation, and that the name of the copyright holders not be used in
  10  * advertising or publicity pertaining to distribution of the software
  11  * without specific, written prior permission.  The copyright holders make
  12  * no representations about the suitability of this software for any
  13  * purpose.  It is provided "as is" without express or implied warranty.
  14  *
  15  * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS
  16  * SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
  17  * FITNESS, IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY
  18  * SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
  19  * RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF
  20  * CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
  21  * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  22  */
  23
  24 #include "config.h"
  25
  26 #include <errno.h>
  27 #include <stdbool.h>
  28 #include <stdlib.h>
  29 #include <string.h>
  30 #include "linux/input.h"
  31 #include <unistd.h>
  32 #include <fcntl.h>
  33 #include <mtdev-plumbing.h>
  34 #include <assert.h>
  35 #include <time.h>
  36 #include <math.h>
  37
  38 #include "libinput.h"
  39 #include "evdev.h"
  40 #include "filter.h"
  41 #include "libinput-private.h"
  42
  43 #define DEFAULT_AXIS_STEP_DISTANCE 10
  44 #define DEFAULT_MIDDLE_BUTTON_SCROLL_TIMEOUT 200
  45
  46 enum evdev_key_type {
  47         EVDEV_KEY_TYPE_NONE,
  48         EVDEV_KEY_TYPE_KEY,
  49         EVDEV_KEY_TYPE_BUTTON,
  50 };
  51
  52 static void
  53 hw_set_key_down(struct evdev_device *device, int code, int pressed)
  54 {
  55         long_set_bit_state(device->hw_key_mask, code, pressed);
  56 }
  57
  58 static int
  59 hw_is_key_down(struct evdev_device *device, int code)
  60 {
  61         return long_bit_is_set(device->hw_key_mask, code);
  62 }
  63
  64 static int
  65 get_key_down_count(struct evdev_device *device, int code)
  66 {
  67         return device->key_count[code];
  68 }
  69
  70 static int
  71 update_key_down_count(struct evdev_device *device, int code, int pressed)
  72 {
  73         int key_count;
  74         assert(code >= 0 && code < KEY_CNT);
  75
  76         if (pressed) {
  77                 key_count = ++device->key_count[code];
  78         } else {
  79                 assert(device->key_count[code] > 0);
  80                 key_count = --device->key_count[code];
  81         }
  82
  83         if (key_count > 32) {
  84                 log_bug_libinput(device->base.seat->libinput,
  85                                  "Key count for %s reached abnormal values\n",
  86                                  libevdev_event_code_get_name(EV_KEY, code));
  87         }
  88
  89         return key_count;
  90 }
  91
  92 void
  93 evdev_keyboard_notify_key(struct evdev_device *device,
  94                           uint32_t time,
  95                           int key,
  96                           enum libinput_key_state state)
  97 {
  98         int down_count;
  99
 100         down_count = update_key_down_count(device, key, state);
 101
 102         if ((state == LIBINPUT_KEY_STATE_PRESSED && down_count == 1) ||
 103             (state == LIBINPUT_KEY_STATE_RELEASED && down_count == 0))
 104                 keyboard_notify_key(&device->base, time, key, state);
 105 }
 106
 107 void
 108 evdev_pointer_notify_button(struct evdev_device *device,
 109                             uint32_t time,
 110                             int button,
 111                             enum libinput_button_state state)
 112 {
 113         int down_count;
 114
 115         down_count = update_key_down_count(device, button, state);
 116
 117         if ((state == LIBINPUT_BUTTON_STATE_PRESSED && down_count == 1) ||
 118             (state == LIBINPUT_BUTTON_STATE_RELEASED && down_count == 0))
 119                 pointer_notify_button(&device->base, time, button, state);
 120 }
 121
 122 void
 123 evdev_device_led_update(struct evdev_device *device, enum libinput_led leds)
 124 {
 125         static const struct {
 126                 enum libinput_led weston;
 127                 int evdev;
 128         } map[] = {
 129                 { LIBINPUT_LED_NUM_LOCK, LED_NUML },
 130                 { LIBINPUT_LED_CAPS_LOCK, LED_CAPSL },
 131                 { LIBINPUT_LED_SCROLL_LOCK, LED_SCROLLL },
 132         };
 133         struct input_event ev[ARRAY_LENGTH(map) + 1];
 134         unsigned int i;
 135
 136         if (!(device->seat_caps & EVDEV_DEVICE_KEYBOARD))
 137                 return;
 138
 139         memset(ev, 0, sizeof(ev));
 140         for (i = 0; i < ARRAY_LENGTH(map); i++) {
 141                 ev[i].type = EV_LED;
 142                 ev[i].code = map[i].evdev;
 143                 ev[i].value = !!(leds & map[i].weston);
 144         }
 145         ev[i].type = EV_SYN;
 146         ev[i].code = SYN_REPORT;
 147
 148         i = write(device->fd, ev, sizeof ev);
 149         (void)i; /* no, we really don't care about the return value */
 150 }
 151
 152 static void
 153 transform_absolute(struct evdev_device *device, int32_t *x, int32_t *y)
 154 {
 155         if (!device->abs.apply_calibration)
 156                 return;
 157
 158         matrix_mult_vec(&device->abs.calibration, x, y);
 159 }
 160
 161 static inline double
 162 scale_axis(const struct input_absinfo *absinfo, double val, double to_range)
 163 {
 164         return (val - absinfo->minimum) * to_range /
 165                 (absinfo->maximum - absinfo->minimum + 1);
 166 }
 167
 168 double
 169 evdev_device_transform_x(struct evdev_device *device,
 170                          double x,
 171                          uint32_t width)
 172 {
 173         return scale_axis(device->abs.absinfo_x, x, width);
 174 }
 175
 176 double
 177 evdev_device_transform_y(struct evdev_device *device,
 178                          double y,
 179                          uint32_t height)
 180 {
 181         return scale_axis(device->abs.absinfo_y, y, height);
 182 }
 183
 184 static void
 185 evdev_flush_pending_event(struct evdev_device *device, uint64_t time)
 186 {
 187         struct libinput *libinput = device->base.seat->libinput;
 188         struct motion_params motion;
 189         int32_t cx, cy;
 190         int32_t x, y;
 191         int slot;
 192         int seat_slot;
 193         struct libinput_device *base = &device->base;
 194         struct libinput_seat *seat = base->seat;
 195
 196         slot = device->mt.slot;
 197
 198         switch (device->pending_event) {
 199         case EVDEV_NONE:
 200                 return;
 201         case EVDEV_RELATIVE_MOTION:
 202                 motion.dx = device->rel.dx;
 203                 motion.dy = device->rel.dy;
 204                 device->rel.dx = 0;
 205                 device->rel.dy = 0;
 206
 207                 /* Use unaccelerated deltas for pointing stick scroll */
 208                 if (device->scroll.has_middle_button_scroll &&
 209                     hw_is_key_down(device, BTN_MIDDLE)) {
 210                         if (device->scroll.middle_button_scroll_active)
 211                                 evdev_post_scroll(device, time,
 212                                                   motion.dx, motion.dy);
 213                         break;
 214                 }
 215
 216                 /* Apply pointer acceleration. */
 217                 filter_dispatch(device->pointer.filter, &motion, device, time);
 218
 219                 if (motion.dx == 0.0 && motion.dy == 0.0)
 220                         break;
 221
 222                 pointer_notify_motion(base, time, motion.dx, motion.dy);
 223                 break;
 224         case EVDEV_ABSOLUTE_MT_DOWN:
 225                 if (!(device->seat_caps & EVDEV_DEVICE_TOUCH))
 226                         break;
 227
 228                 if (device->mt.slots[slot].seat_slot != -1) {
 229                         log_bug_kernel(libinput,
 230                                        "%s: Driver sent multiple touch down for the "
 231                                        "same slot", device->devnode);
 232                         break;
 233                 }
 234
 235                 seat_slot = ffs(~seat->slot_map) - 1;
 236                 device->mt.slots[slot].seat_slot = seat_slot;
 237
 238                 if (seat_slot == -1)
 239                         break;
 240
 241                 seat->slot_map |= 1 << seat_slot;
 242                 x = device->mt.slots[slot].x;
 243                 y = device->mt.slots[slot].y;
 244                 transform_absolute(device, &x, &y);
 245
 246                 touch_notify_touch_down(base, time, slot, seat_slot, x, y);
 247                 break;
 248         case EVDEV_ABSOLUTE_MT_MOTION:
 249                 if (!(device->seat_caps & EVDEV_DEVICE_TOUCH))
 250                         break;
 251
 252                 seat_slot = device->mt.slots[slot].seat_slot;
 253                 x = device->mt.slots[slot].x;
 254                 y = device->mt.slots[slot].y;
 255
 256                 if (seat_slot == -1)
 257                         break;
 258
 259                 transform_absolute(device, &x, &y);
 260                 touch_notify_touch_motion(base, time, slot, seat_slot, x, y);
 261                 break;
 262         case EVDEV_ABSOLUTE_MT_UP:
 263                 if (!(device->seat_caps & EVDEV_DEVICE_TOUCH))
 264                         break;
 265
 266                 seat_slot = device->mt.slots[slot].seat_slot;
 267                 device->mt.slots[slot].seat_slot = -1;
 268
 269                 if (seat_slot == -1)
 270                         break;
 271
 272                 seat->slot_map &= ~(1 << seat_slot);
 273
 274                 touch_notify_touch_up(base, time, slot, seat_slot);
 275                 break;
 276         case EVDEV_ABSOLUTE_TOUCH_DOWN:
 277                 if (!(device->seat_caps & EVDEV_DEVICE_TOUCH))
 278                         break;
 279
 280                 if (device->abs.seat_slot != -1) {
 281                         log_bug_kernel(libinput,
 282                                        "%s: Driver sent multiple touch down for the "
 283                                        "same slot", device->devnode);
 284                         break;
 285                 }
 286
 287                 seat_slot = ffs(~seat->slot_map) - 1;
 288                 device->abs.seat_slot = seat_slot;
 289
 290                 if (seat_slot == -1)
 291                         break;
 292
 293                 seat->slot_map |= 1 << seat_slot;
 294
 295                 cx = device->abs.x;
 296                 cy = device->abs.y;
 297                 transform_absolute(device, &cx, &cy);
 298
 299                 touch_notify_touch_down(base, time, -1, seat_slot, cx, cy);
 300                 break;
 301         case EVDEV_ABSOLUTE_MOTION:
 302                 cx = device->abs.x;
 303                 cy = device->abs.y;
 304                 transform_absolute(device, &cx, &cy);
 305                 x = cx;
 306                 y = cy;
 307
 308                 if (device->seat_caps & EVDEV_DEVICE_TOUCH) {
 309                         seat_slot = device->abs.seat_slot;
 310
 311                         if (seat_slot == -1)
 312                                 break;
 313
 314                         touch_notify_touch_motion(base, time, -1, seat_slot, x, y);
 315                 } else if (device->seat_caps & EVDEV_DEVICE_POINTER) {
 316                         pointer_notify_motion_absolute(base, time, x, y);
 317                 }
 318                 break;
 319         case EVDEV_ABSOLUTE_TOUCH_UP:
 320                 if (!(device->seat_caps & EVDEV_DEVICE_TOUCH))
 321                         break;
 322
 323                 seat_slot = device->abs.seat_slot;
 324                 device->abs.seat_slot = -1;
 325
 326                 if (seat_slot == -1)
 327                         break;
 328
 329                 seat->slot_map &= ~(1 << seat_slot);
 330
 331                 touch_notify_touch_up(base, time, -1, seat_slot);
 332                 break;
 333         default:
 334                 assert(0 && "Unknown pending event type");
 335                 break;
 336         }
 337
 338         device->pending_event = EVDEV_NONE;
 339 }
 340
 341 static enum evdev_key_type
 342 get_key_type(uint16_t code)
 343 {
 344         if (code == BTN_TOUCH)
 345                 return EVDEV_KEY_TYPE_NONE;
 346
 347         if (code >= KEY_ESC && code <= KEY_MICMUTE)
 348                 return EVDEV_KEY_TYPE_KEY;
 349         if (code >= BTN_MISC && code <= BTN_GEAR_UP)
 350                 return EVDEV_KEY_TYPE_BUTTON;
 351         if (code >= KEY_OK && code <= KEY_LIGHTS_TOGGLE)
 352                 return EVDEV_KEY_TYPE_KEY;
 353         if (code >= BTN_DPAD_UP && code <= BTN_TRIGGER_HAPPY40)
 354                 return EVDEV_KEY_TYPE_BUTTON;
 355         return EVDEV_KEY_TYPE_NONE;
 356 }
 357
 358 static void
 359 evdev_middle_button_scroll_timeout(uint64_t time, void *data)
 360 {
 361         struct evdev_device *device = data;
 362
 363         device->scroll.middle_button_scroll_active = true;
 364 }
 365
 366 static void
 367 evdev_middle_button_scroll_button(struct evdev_device *device,
 368                                  uint64_t time, int is_press)
 369 {
 370         if (is_press) {
 371                 libinput_timer_set(&device->scroll.timer,
 372                                 time + DEFAULT_MIDDLE_BUTTON_SCROLL_TIMEOUT);
 373         } else {
 374                 libinput_timer_cancel(&device->scroll.timer);
 375                 if (device->scroll.middle_button_scroll_active) {
 376                         evdev_stop_scroll(device, time);
 377                         device->scroll.middle_button_scroll_active = false;
 378                 } else {
 379                         /* If the button is released quickly enough emit the
 380                          * button press/release events. */
 381                         evdev_pointer_notify_button(device, time, BTN_MIDDLE,
 382                                         LIBINPUT_BUTTON_STATE_PRESSED);
 383                         evdev_pointer_notify_button(device, time, BTN_MIDDLE,
 384                                         LIBINPUT_BUTTON_STATE_RELEASED);
 385                 }
 386         }
 387 }
 388
 389 static void
 390 evdev_process_touch_button(struct evdev_device *device,
 391                            uint64_t time, int value)
 392 {
 393         if (device->pending_event != EVDEV_NONE &&
 394             device->pending_event != EVDEV_ABSOLUTE_MOTION)
 395                 evdev_flush_pending_event(device, time);
 396
 397         device->pending_event = (value ?
 398                                  EVDEV_ABSOLUTE_TOUCH_DOWN :
 399                                  EVDEV_ABSOLUTE_TOUCH_UP);
 400 }
 401
 402 static inline void
 403 evdev_process_key(struct evdev_device *device,
 404                   struct input_event *e, uint64_t time)
 405 {
 406         enum evdev_key_type type;
 407
 408         /* ignore kernel key repeat */
 409         if (e->value == 2)
 410                 return;
 411
 412         if (e->code == BTN_TOUCH) {
 413                 if (!device->is_mt)
 414                         evdev_process_touch_button(device, time, e->value);
 415                 return;
 416         }
 417
 418         evdev_flush_pending_event(device, time);
 419
 420         type = get_key_type(e->code);
 421
 422         /* Ignore key release events from the kernel for keys that libinput
 423          * never got a pressed event for. */
 424         if (e->value == 0) {
 425                 switch (type) {
 426                 case EVDEV_KEY_TYPE_NONE:
 427                         break;
 428                 case EVDEV_KEY_TYPE_KEY:
 429                 case EVDEV_KEY_TYPE_BUTTON:
 430                         if (!hw_is_key_down(device, e->code))
 431                                 return;
 432                 }
 433         }
 434
 435         hw_set_key_down(device, e->code, e->value);
 436
 437         switch (type) {
 438         case EVDEV_KEY_TYPE_NONE:
 439                 break;
 440         case EVDEV_KEY_TYPE_KEY:
 441                 evdev_keyboard_notify_key(
 442                         device,
 443                         time,
 444                         e->code,
 445                         e->value ? LIBINPUT_KEY_STATE_PRESSED :
 446                                    LIBINPUT_KEY_STATE_RELEASED);
 447                 break;
 448         case EVDEV_KEY_TYPE_BUTTON:
 449                 if (device->scroll.has_middle_button_scroll &&
 450                     e->code == BTN_MIDDLE) {
 451                         evdev_middle_button_scroll_button(device, time,
 452                                                           e->value);
 453                         break;
 454                 }
 455                 evdev_pointer_notify_button(
 456                         device,
 457                         time,
 458                         e->code,
 459                         e->value ? LIBINPUT_BUTTON_STATE_PRESSED :
 460                                    LIBINPUT_BUTTON_STATE_RELEASED);
 461                 break;
 462         }
 463 }
 464
 465 static void
 466 evdev_process_touch(struct evdev_device *device,
 467                     struct input_event *e,
 468                     uint64_t time)
 469 {
 470         switch (e->code) {
 471         case ABS_MT_SLOT:
 472                 evdev_flush_pending_event(device, time);
 473                 device->mt.slot = e->value;
 474                 break;
 475         case ABS_MT_TRACKING_ID:
 476                 if (device->pending_event != EVDEV_NONE &&
 477                     device->pending_event != EVDEV_ABSOLUTE_MT_MOTION)
 478                         evdev_flush_pending_event(device, time);
 479                 if (e->value >= 0)
 480                         device->pending_event = EVDEV_ABSOLUTE_MT_DOWN;
 481                 else
 482                         device->pending_event = EVDEV_ABSOLUTE_MT_UP;
 483                 break;
 484         case ABS_MT_POSITION_X:
 485                 device->mt.slots[device->mt.slot].x = e->value;
 486                 if (device->pending_event == EVDEV_NONE)
 487                         device->pending_event = EVDEV_ABSOLUTE_MT_MOTION;
 488                 break;
 489         case ABS_MT_POSITION_Y:
 490                 device->mt.slots[device->mt.slot].y = e->value;
 491                 if (device->pending_event == EVDEV_NONE)
 492                         device->pending_event = EVDEV_ABSOLUTE_MT_MOTION;
 493                 break;
 494         }
 495 }
 496
 497 static inline void
 498 evdev_process_absolute_motion(struct evdev_device *device,
 499                               struct input_event *e)
 500 {
 501         switch (e->code) {
 502         case ABS_X:
 503                 device->abs.x = e->value;
 504                 if (device->pending_event == EVDEV_NONE)
 505                         device->pending_event = EVDEV_ABSOLUTE_MOTION;
 506                 break;
 507         case ABS_Y:
 508                 device->abs.y = e->value;
 509                 if (device->pending_event == EVDEV_NONE)
 510                         device->pending_event = EVDEV_ABSOLUTE_MOTION;
 511                 break;
 512         }
 513 }
 514
 515 static inline void
 516 evdev_process_relative(struct evdev_device *device,
 517                        struct input_event *e, uint64_t time)
 518 {
 519         struct libinput_device *base = &device->base;
 520
 521         switch (e->code) {
 522         case REL_X:
 523                 if (device->pending_event != EVDEV_RELATIVE_MOTION)
 524                         evdev_flush_pending_event(device, time);
 525                 device->rel.dx += e->value;
 526                 device->pending_event = EVDEV_RELATIVE_MOTION;
 527                 break;
 528         case REL_Y:
 529                 if (device->pending_event != EVDEV_RELATIVE_MOTION)
 530                         evdev_flush_pending_event(device, time);
 531                 device->rel.dy += e->value;
 532                 device->pending_event = EVDEV_RELATIVE_MOTION;
 533                 break;
 534         case REL_WHEEL:
 535                 evdev_flush_pending_event(device, time);
 536                 pointer_notify_axis(
 537                         base,
 538                         time,
 539                         LIBINPUT_POINTER_AXIS_SCROLL_VERTICAL,
 540                         -1 * e->value * DEFAULT_AXIS_STEP_DISTANCE);
 541                 break;
 542         case REL_HWHEEL:
 543                 evdev_flush_pending_event(device, time);
 544                 switch (e->value) {
 545                 case -1:
 546                         /* Scroll left */
 547                 case 1:
 548                         /* Scroll right */
 549                         pointer_notify_axis(
 550                                 base,
 551                                 time,
 552                                 LIBINPUT_POINTER_AXIS_SCROLL_HORIZONTAL,
 553                                 e->value * DEFAULT_AXIS_STEP_DISTANCE);
 554                         break;
 555                 default:
 556                         break;
 557
 558                 }
 559         }
 560 }
 561
 562 static inline void
 563 evdev_process_absolute(struct evdev_device *device,
 564                        struct input_event *e,
 565                        uint64_t time)
 566 {
 567         if (device->is_mt) {
 568                 evdev_process_touch(device, e, time);
 569         } else {
 570                 evdev_process_absolute_motion(device, e);
 571         }
 572 }
 573
 574 static inline int
 575 evdev_need_touch_frame(struct evdev_device *device)
 576 {
 577         if (!(device->seat_caps & EVDEV_DEVICE_TOUCH))
 578                 return 0;
 579
 580         switch (device->pending_event) {
 581         case EVDEV_NONE:
 582         case EVDEV_RELATIVE_MOTION:
 583                 break;
 584         case EVDEV_ABSOLUTE_MT_DOWN:
 585         case EVDEV_ABSOLUTE_MT_MOTION:
 586         case EVDEV_ABSOLUTE_MT_UP:
 587         case EVDEV_ABSOLUTE_TOUCH_DOWN:
 588         case EVDEV_ABSOLUTE_TOUCH_UP:
 589         case EVDEV_ABSOLUTE_MOTION:
 590                 return 1;
 591         }
 592
 593         return 0;
 594 }
 595
 596 static void
 597 evdev_tag_external_mouse(struct evdev_device *device,
 598                          struct udev_device *udev_device)
 599 {
 600         int bustype;
 601
 602         bustype = libevdev_get_id_bustype(device->evdev);
 603         if (bustype == BUS_USB || bustype == BUS_BLUETOOTH) {
 604                 if (device->seat_caps & EVDEV_DEVICE_POINTER)
 605                         device->tags |= EVDEV_TAG_EXTERNAL_MOUSE;
 606         }
 607 }
 608
 609 static void
 610 evdev_tag_trackpoint(struct evdev_device *device,
 611                      struct udev_device *udev_device)
 612 {
 613         if (libevdev_has_property(device->evdev, INPUT_PROP_POINTING_STICK))
 614                 device->tags |= EVDEV_TAG_TRACKPOINT;
 615 }
 616
 617 static void
 618 fallback_process(struct evdev_dispatch *dispatch,
 619                  struct evdev_device *device,
 620                  struct input_event *event,
 621                  uint64_t time)
 622 {
 623         int need_frame = 0;
 624
 625         switch (event->type) {
 626         case EV_REL:
 627                 evdev_process_relative(device, event, time);
 628                 break;
 629         case EV_ABS:
 630                 evdev_process_absolute(device, event, time);
 631                 break;
 632         case EV_KEY:
 633                 evdev_process_key(device, event, time);
 634                 break;
 635         case EV_SYN:
 636                 need_frame = evdev_need_touch_frame(device);
 637                 evdev_flush_pending_event(device, time);
 638                 if (need_frame)
 639                         touch_notify_frame(&device->base, time);
 640                 break;
 641         }
 642 }
 643
 644 static void
 645 fallback_destroy(struct evdev_dispatch *dispatch)
 646 {
 647         free(dispatch);
 648 }
 649
 650 static void
 651 fallback_tag_device(struct evdev_device *device,
 652                     struct udev_device *udev_device)
 653 {
 654         evdev_tag_external_mouse(device, udev_device);
 655         evdev_tag_trackpoint(device, udev_device);
 656 }
 657
 658 static int
 659 evdev_calibration_has_matrix(struct libinput_device *libinput_device)
 660 {
 661         struct evdev_device *device = (struct evdev_device*)libinput_device;
 662
 663         return device->abs.absinfo_x && device->abs.absinfo_y;
 664 }
 665
 666 static enum libinput_config_status
 667 evdev_calibration_set_matrix(struct libinput_device *libinput_device,
 668                              const float matrix[6])
 669 {
 670         struct evdev_device *device = (struct evdev_device*)libinput_device;
 671
 672         evdev_device_calibrate(device, matrix);
 673
 674         return LIBINPUT_CONFIG_STATUS_SUCCESS;
 675 }
 676
 677 static int
 678 evdev_calibration_get_matrix(struct libinput_device *libinput_device,
 679                              float matrix[6])
 680 {
 681         struct evdev_device *device = (struct evdev_device*)libinput_device;
 682
 683         matrix_to_farray6(&device->abs.usermatrix, matrix);
 684
 685         return !matrix_is_identity(&device->abs.usermatrix);
 686 }
 687
 688 static int
 689 evdev_calibration_get_default_matrix(struct libinput_device *libinput_device,
 690                                      float matrix[6])
 691 {
 692         struct evdev_device *device = (struct evdev_device*)libinput_device;
 693
 694         matrix_to_farray6(&device->abs.default_calibration, matrix);
 695
 696         return !matrix_is_identity(&device->abs.default_calibration);
 697 }
 698
 699 struct evdev_dispatch_interface fallback_interface = {
 700         fallback_process,
 701         fallback_destroy,
 702         NULL, /* device_added */
 703         NULL, /* device_removed */
 704         NULL, /* device_suspended */
 705         NULL, /* device_resumed */
 706         fallback_tag_device,
 707 };
 708
 709 static uint32_t
 710 evdev_sendevents_get_modes(struct libinput_device *device)
 711 {
 712         return LIBINPUT_CONFIG_SEND_EVENTS_ENABLED |
 713                LIBINPUT_CONFIG_SEND_EVENTS_DISABLED;
 714 }
 715
 716 static enum libinput_config_status
 717 evdev_sendevents_set_mode(struct libinput_device *device,
 718                           enum libinput_config_send_events_mode mode)
 719 {
 720         struct evdev_device *evdev = (struct evdev_device*)device;
 721         struct evdev_dispatch *dispatch = evdev->dispatch;
 722
 723         if (mode == dispatch->sendevents.current_mode)
 724                 return LIBINPUT_CONFIG_STATUS_SUCCESS;
 725
 726         switch(mode) {
 727         case LIBINPUT_CONFIG_SEND_EVENTS_ENABLED:
 728                 evdev_device_resume(evdev);
 729                 break;
 730         case LIBINPUT_CONFIG_SEND_EVENTS_DISABLED:
 731                 evdev_device_suspend(evdev);
 732                 break;
 733         default:
 734                 return LIBINPUT_CONFIG_STATUS_UNSUPPORTED;
 735         }
 736
 737         dispatch->sendevents.current_mode = mode;
 738
 739         return LIBINPUT_CONFIG_STATUS_SUCCESS;
 740 }
 741
 742 static enum libinput_config_send_events_mode
 743 evdev_sendevents_get_mode(struct libinput_device *device)
 744 {
 745         struct evdev_device *evdev = (struct evdev_device*)device;
 746         struct evdev_dispatch *dispatch = evdev->dispatch;
 747
 748         return dispatch->sendevents.current_mode;
 749 }
 750
 751 static enum libinput_config_send_events_mode
 752 evdev_sendevents_get_default_mode(struct libinput_device *device)
 753 {
 754         return LIBINPUT_CONFIG_SEND_EVENTS_ENABLED;
 755 }
 756
 757 static struct evdev_dispatch *
 758 fallback_dispatch_create(struct libinput_device *device)
 759 {
 760         struct evdev_dispatch *dispatch = zalloc(sizeof *dispatch);
 761         if (dispatch == NULL)
 762                 return NULL;
 763
 764         dispatch->interface = &fallback_interface;
 765
 766         device->config.calibration = &dispatch->calibration;
 767
 768         dispatch->calibration.has_matrix = evdev_calibration_has_matrix;
 769         dispatch->calibration.set_matrix = evdev_calibration_set_matrix;
 770         dispatch->calibration.get_matrix = evdev_calibration_get_matrix;
 771         dispatch->calibration.get_default_matrix = evdev_calibration_get_default_matrix;
 772
 773         device->config.sendevents = &dispatch->sendevents.config;
 774
 775         dispatch->sendevents.current_mode = LIBINPUT_CONFIG_SEND_EVENTS_ENABLED;
 776         dispatch->sendevents.config.get_modes = evdev_sendevents_get_modes;
 777         dispatch->sendevents.config.set_mode = evdev_sendevents_set_mode;
 778         dispatch->sendevents.config.get_mode = evdev_sendevents_get_mode;
 779         dispatch->sendevents.config.get_default_mode = evdev_sendevents_get_default_mode;
 780
 781         return dispatch;
 782 }
 783
 784 static inline void
 785 evdev_process_event(struct evdev_device *device, struct input_event *e)
 786 {
 787         struct evdev_dispatch *dispatch = device->dispatch;
 788         uint64_t time = e->time.tv_sec * 1000ULL + e->time.tv_usec / 1000;
 789
 790         dispatch->interface->process(dispatch, device, e, time);
 791 }
 792
 793 static inline void
 794 evdev_device_dispatch_one(struct evdev_device *device,
 795                           struct input_event *ev)
 796 {
 797         if (!device->mtdev) {
 798                 evdev_process_event(device, ev);
 799         } else {
 800                 mtdev_put_event(device->mtdev, ev);
 801                 if (libevdev_event_is_code(ev, EV_SYN, SYN_REPORT)) {
 802                         while (!mtdev_empty(device->mtdev)) {
 803                                 struct input_event e;
 804                                 mtdev_get_event(device->mtdev, &e);
 805                                 evdev_process_event(device, &e);
 806                         }
 807                 }
 808         }
 809 }
 810
 811 static int
 812 evdev_sync_device(struct evdev_device *device)
 813 {
 814         struct input_event ev;
 815         int rc;
 816
 817         do {
 818                 rc = libevdev_next_event(device->evdev,
 819                                          LIBEVDEV_READ_FLAG_SYNC, &ev);
 820                 if (rc < 0)
 821                         break;
 822                 evdev_device_dispatch_one(device, &ev);
 823         } while (rc == LIBEVDEV_READ_STATUS_SYNC);
 824
 825         return rc == -EAGAIN ? 0 : rc;
 826 }
 827
 828 static void
 829 evdev_device_dispatch(void *data)
 830 {
 831         struct evdev_device *device = data;
 832         struct libinput *libinput = device->base.seat->libinput;
 833         struct input_event ev;
 834         int rc;
 835
 836         /* If the compositor is repainting, this function is called only once
 837          * per frame and we have to process all the events available on the
 838          * fd, otherwise there will be input lag. */
 839         do {
 840                 rc = libevdev_next_event(device->evdev,
 841                                          LIBEVDEV_READ_FLAG_NORMAL, &ev);
 842                 if (rc == LIBEVDEV_READ_STATUS_SYNC) {
 843                         /* send one more sync event so we handle all
 844                            currently pending events before we sync up
 845                            to the current state */
 846                         ev.code = SYN_REPORT;
 847                         evdev_device_dispatch_one(device, &ev);
 848
 849                         rc = evdev_sync_device(device);
 850                         if (rc == 0)
 851                                 rc = LIBEVDEV_READ_STATUS_SUCCESS;
 852                 } else if (rc == LIBEVDEV_READ_STATUS_SUCCESS) {
 853                         evdev_device_dispatch_one(device, &ev);
 854                 }
 855         } while (rc == LIBEVDEV_READ_STATUS_SUCCESS);
 856
 857         if (rc != -EAGAIN && rc != -EINTR) {
 858                 libinput_remove_source(libinput, device->source);
 859                 device->source = NULL;
 860         }
 861 }
 862
 863 static int
 864 configure_pointer_acceleration(struct evdev_device *device)
 865 {
 866         device->pointer.filter =
 867                 create_pointer_accelator_filter(
 868                         pointer_accel_profile_linear);
 869         if (!device->pointer.filter)
 870                 return -1;
 871
 872         return 0;
 873 }
 874
 875
 876 static inline int
 877 evdev_need_mtdev(struct evdev_device *device)
 878 {
 879         struct libevdev *evdev = device->evdev;
 880
 881         return (libevdev_has_event_code(evdev, EV_ABS, ABS_MT_POSITION_X) &&
 882                 libevdev_has_event_code(evdev, EV_ABS, ABS_MT_POSITION_Y) &&
 883                 !libevdev_has_event_code(evdev, EV_ABS, ABS_MT_SLOT));
 884 }
 885
 886 static void
 887 evdev_tag_device(struct evdev_device *device)
 888 {
 889         struct udev *udev;
 890         struct udev_device *udev_device = NULL;
 891
 892         udev = udev_new();
 893         if (!udev)
 894                 return;
 895
 896         udev_device = udev_device_new_from_syspath(udev, device->syspath);
 897         if (udev_device) {
 898                 if (device->dispatch->interface->tag_device)
 899                         device->dispatch->interface->tag_device(device, udev_device);
 900                 udev_device_unref(udev_device);
 901         }
 902         udev_unref(udev);
 903 }
 904
 905 static int
 906 evdev_configure_device(struct evdev_device *device)
 907 {
 908         struct libinput *libinput = device->base.seat->libinput;
 909         struct libevdev *evdev = device->evdev;
 910         const struct input_absinfo *absinfo;
 911         struct input_absinfo fixed;
 912         int has_abs, has_rel, has_mt;
 913         int has_button, has_keyboard, has_touch;
 914         struct mt_slot *slots;
 915         int num_slots;
 916         int active_slot;
 917         int slot;
 918         unsigned int i;
 919
 920         has_rel = 0;
 921         has_abs = 0;
 922         has_mt = 0;
 923         has_button = 0;
 924         has_keyboard = 0;
 925         has_touch = 0;
 926
 927         if (libevdev_has_event_type(evdev, EV_ABS)) {
 928
 929                 if ((absinfo = libevdev_get_abs_info(evdev, ABS_X))) {
 930                         if (absinfo->resolution == 0) {
 931                                 fixed = *absinfo;
 932                                 fixed.resolution = 1;
 933                                 libevdev_set_abs_info(evdev, ABS_X, &fixed);
 934                                 device->abs.fake_resolution = 1;
 935                         }
 936                         device->abs.absinfo_x = absinfo;
 937                         has_abs = 1;
 938                 }
 939                 if ((absinfo = libevdev_get_abs_info(evdev, ABS_Y))) {
 940                         if (absinfo->resolution == 0) {
 941                                 fixed = *absinfo;
 942                                 fixed.resolution = 1;
 943                                 libevdev_set_abs_info(evdev, ABS_Y, &fixed);
 944                                 device->abs.fake_resolution = 1;
 945                         }
 946                         device->abs.absinfo_y = absinfo;
 947                         has_abs = 1;
 948                 }
 949                 /* We only handle the slotted Protocol B in weston.
 950                    Devices with ABS_MT_POSITION_* but not ABS_MT_SLOT
 951                    require mtdev for conversion. */
 952                 if (libevdev_has_event_code(evdev, EV_ABS, ABS_MT_POSITION_X) &&
 953                     libevdev_has_event_code(evdev, EV_ABS, ABS_MT_POSITION_Y)) {
 954                         absinfo = libevdev_get_abs_info(evdev, ABS_MT_POSITION_X);
 955                         if (absinfo->resolution == 0) {
 956                                 fixed = *absinfo;
 957                                 fixed.resolution = 1;
 958                                 libevdev_set_abs_info(evdev,
 959                                                       ABS_MT_POSITION_X,
 960                                                       &fixed);
 961                                 device->abs.fake_resolution = 1;
 962                         }
 963                         device->abs.absinfo_x = absinfo;
 964                         absinfo = libevdev_get_abs_info(evdev, ABS_MT_POSITION_Y);
 965                         if (absinfo->resolution == 0) {
 966                                 fixed = *absinfo;
 967                                 fixed.resolution = 1;
 968                                 libevdev_set_abs_info(evdev,
 969                                                       ABS_MT_POSITION_Y,
 970                                                       &fixed);
 971                                 device->abs.fake_resolution = 1;
 972                         }
 973                         device->abs.absinfo_y = absinfo;
 974                         device->is_mt = 1;
 975                         has_touch = 1;
 976                         has_mt = 1;
 977
 978                         if (evdev_need_mtdev(device)) {
 979                                 device->mtdev = mtdev_new_open(device->fd);
 980                                 if (!device->mtdev)
 981                                         return -1;
 982
 983                                 num_slots = device->mtdev->caps.slot.maximum;
 984                                 if (device->mtdev->caps.slot.minimum < 0 ||
 985                                     num_slots <= 0)
 986                                         return -1;
 987                                 active_slot = device->mtdev->caps.slot.value;
 988                         } else {
 989                                 num_slots = libevdev_get_num_slots(device->evdev);
 990                                 active_slot = libevdev_get_current_slot(evdev);
 991                         }
 992
 993                         slots = calloc(num_slots, sizeof(struct mt_slot));
 994                         if (!slots)
 995                                 return -1;
 996
 997                         for (slot = 0; slot < num_slots; ++slot) {
 998                                 slots[slot].seat_slot = -1;
 999                                 slots[slot].x = 0;
1000                                 slots[slot].y = 0;
1001                         }
1002                         device->mt.slots = slots;
1003                         device->mt.slots_len = num_slots;
1004                         device->mt.slot = active_slot;
1005                 }
1006         }
1007
1008         if (libevdev_has_property(evdev, INPUT_PROP_POINTING_STICK)) {
1009                 libinput_timer_init(&device->scroll.timer,
1010                                     device->base.seat->libinput,
1011                                     evdev_middle_button_scroll_timeout,
1012                                     device);
1013                 device->scroll.has_middle_button_scroll = true;
1014         }
1015
1016         if (libevdev_has_event_code(evdev, EV_REL, REL_X) ||
1017             libevdev_has_event_code(evdev, EV_REL, REL_Y))
1018                 has_rel = 1;
1019
1020         if (libevdev_has_event_type(evdev, EV_KEY)) {
1021                 if (!libevdev_has_property(evdev, INPUT_PROP_DIRECT) &&
1022                     libevdev_has_event_code(evdev, EV_KEY, BTN_TOOL_FINGER) &&
1023                     !libevdev_has_event_code(evdev, EV_KEY, BTN_TOOL_PEN) &&
1024                     (has_abs || has_mt)) {
1025                         device->dispatch = evdev_mt_touchpad_create(device);
1026                         log_info(libinput,
1027                                  "input device '%s', %s is a touchpad\n",
1028                                  device->devname, device->devnode);
1029                         return device->dispatch == NULL ? -1 : 0;
1030                 }
1031
1032                 for (i = 0; i < KEY_MAX; i++) {
1033                         if (libevdev_has_event_code(evdev, EV_KEY, i)) {
1034                                 switch (get_key_type(i)) {
1035                                 case EVDEV_KEY_TYPE_NONE:
1036                                         break;
1037                                 case EVDEV_KEY_TYPE_KEY:
1038                                         has_keyboard = 1;
1039                                         break;
1040                                 case EVDEV_KEY_TYPE_BUTTON:
1041                                         has_button = 1;
1042                                         break;
1043                                 }
1044                         }
1045                 }
1046
1047                 if (libevdev_has_event_code(evdev, EV_KEY, BTN_TOUCH))
1048                         has_touch = 1;
1049         }
1050         if (libevdev_has_event_type(evdev, EV_LED))
1051                 has_keyboard = 1;
1052
1053         if ((has_abs || has_rel) && has_button) {
1054                 if (configure_pointer_acceleration(device) == -1)
1055                         return -1;
1056
1057                 device->seat_caps |= EVDEV_DEVICE_POINTER;
1058
1059                 log_info(libinput,
1060                          "input device '%s', %s is a pointer caps =%s%s%s\n",
1061                          device->devname, device->devnode,
1062                          has_abs ? " absolute-motion" : "",
1063                          has_rel ? " relative-motion": "",
1064                          has_button ? " button" : "");
1065         }
1066         if (has_keyboard) {
1067                 device->seat_caps |= EVDEV_DEVICE_KEYBOARD;
1068                 log_info(libinput,
1069                          "input device '%s', %s is a keyboard\n",
1070                          device->devname, device->devnode);
1071         }
1072         if (has_touch && !has_button) {
1073                 device->seat_caps |= EVDEV_DEVICE_TOUCH;
1074                 log_info(libinput,
1075                          "input device '%s', %s is a touch device\n",
1076                          device->devname, device->devnode);
1077         }
1078
1079         return 0;
1080 }
1081
1082 static void
1083 evdev_notify_added_device(struct evdev_device *device)
1084 {
1085         struct libinput_device *dev;
1086
1087         list_for_each(dev, &device->base.seat->devices_list, link) {
1088                 struct evdev_device *d = (struct evdev_device*)dev;
1089                 if (dev == &device->base)
1090                         continue;
1091
1092                 /* Notify existing device d about addition of device device */
1093                 if (d->dispatch->interface->device_added)
1094                         d->dispatch->interface->device_added(d, device);
1095
1096                 /* Notify new device device about existing device d */
1097                 if (device->dispatch->interface->device_added)
1098                         device->dispatch->interface->device_added(device, d);
1099
1100                 /* Notify new device device if existing device d is suspended */
1101                 if (d->suspended && device->dispatch->interface->device_suspended)
1102                         device->dispatch->interface->device_suspended(device, d);
1103         }
1104
1105         notify_added_device(&device->base);
1106 }
1107
1108 struct evdev_device *
1109 evdev_device_create(struct libinput_seat *seat,
1110                     const char *devnode,
1111                     const char *sysname,
1112                     const char *syspath)
1113 {
1114         struct libinput *libinput = seat->libinput;
1115         struct evdev_device *device;
1116         int rc;
1117         int fd;
1118         int unhandled_device = 0;
1119
1120         /* Use non-blocking mode so that we can loop on read on
1121          * evdev_device_data() until all events on the fd are
1122          * read.  mtdev_get() also expects this. */
1123         fd = open_restricted(libinput, devnode, O_RDWR | O_NONBLOCK);
1124         if (fd < 0) {
1125                 log_info(libinput,
1126                          "opening input device '%s' failed (%s).\n",
1127                          devnode, strerror(-fd));
1128                 return NULL;
1129         }
1130
1131         device = zalloc(sizeof *device);
1132         if (device == NULL)
1133                 return NULL;
1134
1135         libinput_device_init(&device->base, seat);
1136         libinput_seat_ref(seat);
1137
1138         rc = libevdev_new_from_fd(fd, &device->evdev);
1139         if (rc != 0)
1140                 goto err;
1141
1142         libevdev_set_clock_id(device->evdev, CLOCK_MONOTONIC);
1143
1144         device->seat_caps = 0;
1145         device->is_mt = 0;
1146         device->mtdev = NULL;
1147         device->devnode = strdup(devnode);
1148         device->sysname = strdup(sysname);
1149         device->syspath = strdup(syspath);
1150         device->rel.dx = 0;
1151         device->rel.dy = 0;
1152         device->abs.seat_slot = -1;
1153         device->dispatch = NULL;
1154         device->fd = fd;
1155         device->pending_event = EVDEV_NONE;
1156         device->devname = libevdev_get_name(device->evdev);
1157         device->scroll.threshold = 5.0; /* Default may be overridden */
1158         device->scroll.direction = 0;
1159
1160         matrix_init_identity(&device->abs.calibration);
1161         matrix_init_identity(&device->abs.usermatrix);
1162         matrix_init_identity(&device->abs.default_calibration);
1163
1164         if (evdev_configure_device(device) == -1)
1165                 goto err;
1166
1167         if (device->seat_caps == 0) {
1168                 unhandled_device = 1;
1169                 goto err;
1170         }
1171
1172         /* If the dispatch was not set up use the fallback. */
1173         if (device->dispatch == NULL)
1174                 device->dispatch = fallback_dispatch_create(&device->base);
1175         if (device->dispatch == NULL)
1176                 goto err;
1177
1178         device->source =
1179                 libinput_add_fd(libinput, fd, evdev_device_dispatch, device);
1180         if (!device->source)
1181                 goto err;
1182
1183         list_insert(seat->devices_list.prev, &device->base.link);
1184
1185         evdev_tag_device(device);
1186         evdev_notify_added_device(device);
1187
1188         return device;
1189
1190 err:
1191         if (fd >= 0)
1192                 close_restricted(libinput, fd);
1193         evdev_device_destroy(device);
1194
1195         return unhandled_device ? EVDEV_UNHANDLED_DEVICE :  NULL;
1196 }
1197
1198 int
1199 evdev_device_get_keys(struct evdev_device *device, char *keys, size_t size)
1200 {
1201         memset(keys, 0, size);
1202         return 0;
1203 }
1204
1205 const char *
1206 evdev_device_get_output(struct evdev_device *device)
1207 {
1208         return device->output_name;
1209 }
1210
1211 const char *
1212 evdev_device_get_sysname(struct evdev_device *device)
1213 {
1214         return device->sysname;
1215 }
1216
1217 const char *
1218 evdev_device_get_name(struct evdev_device *device)
1219 {
1220         return device->devname;
1221 }
1222
1223 unsigned int
1224 evdev_device_get_id_product(struct evdev_device *device)
1225 {
1226         return libevdev_get_id_product(device->evdev);
1227 }
1228
1229 unsigned int
1230 evdev_device_get_id_vendor(struct evdev_device *device)
1231 {
1232         return libevdev_get_id_vendor(device->evdev);
1233 }
1234
1235 void
1236 evdev_device_set_default_calibration(struct evdev_device *device,
1237                                      const float calibration[6])
1238 {
1239         matrix_from_farray6(&device->abs.default_calibration, calibration);
1240         evdev_device_calibrate(device, calibration);
1241 }
1242
1243 void
1244 evdev_device_calibrate(struct evdev_device *device,
1245                        const float calibration[6])
1246 {
1247         struct matrix scale,
1248                       translate,
1249                       transform;
1250         double sx, sy;
1251
1252         matrix_from_farray6(&transform, calibration);
1253         device->abs.apply_calibration = !matrix_is_identity(&transform);
1254
1255         if (!device->abs.apply_calibration) {
1256                 matrix_init_identity(&device->abs.calibration);
1257                 return;
1258         }
1259
1260         sx = device->abs.absinfo_x->maximum - device->abs.absinfo_x->minimum + 1;
1261         sy = device->abs.absinfo_y->maximum - device->abs.absinfo_y->minimum + 1;
1262
1263         /* The transformation matrix is in the form:
1264          *  [ a b c ]
1265          *  [ d e f ]
1266          *  [ 0 0 1 ]
1267          * Where a, e are the scale components, a, b, d, e are the rotation
1268          * component (combined with scale) and c and f are the translation
1269          * component. The translation component in the input matrix must be
1270          * normalized to multiples of the device width and height,
1271          * respectively. e.g. c == 1 shifts one device-width to the right.
1272          *
1273          * We pre-calculate a single matrix to apply to event coordinates:
1274          *     M = Un-Normalize * Calibration * Normalize
1275          *
1276          * Normalize: scales the device coordinates to [0,1]
1277          * Calibration: user-supplied matrix
1278          * Un-Normalize: scales back up to device coordinates
1279          * Matrix maths requires the normalize/un-normalize in reverse
1280          * order.
1281          */
1282
1283         /* back up the user matrix so we can return it on request */
1284         matrix_from_farray6(&device->abs.usermatrix, calibration);
1285
1286         /* Un-Normalize */
1287         matrix_init_translate(&translate,
1288                               device->abs.absinfo_x->minimum,
1289                               device->abs.absinfo_y->minimum);
1290         matrix_init_scale(&scale, sx, sy);
1291         matrix_mult(&scale, &translate, &scale);
1292
1293         /* Calibration */
1294         matrix_mult(&transform, &scale, &transform);
1295
1296         /* Normalize */
1297         matrix_init_translate(&translate,
1298                               -device->abs.absinfo_x->minimum/sx,
1299                               -device->abs.absinfo_y->minimum/sy);
1300         matrix_init_scale(&scale, 1.0/sx, 1.0/sy);
1301         matrix_mult(&scale, &translate, &scale);
1302
1303         /* store final matrix in device */
1304         matrix_mult(&device->abs.calibration, &transform, &scale);
1305 }
1306
1307 int
1308 evdev_device_has_capability(struct evdev_device *device,
1309                             enum libinput_device_capability capability)
1310 {
1311         switch (capability) {
1312         case LIBINPUT_DEVICE_CAP_POINTER:
1313                 return !!(device->seat_caps & EVDEV_DEVICE_POINTER);
1314         case LIBINPUT_DEVICE_CAP_KEYBOARD:
1315                 return !!(device->seat_caps & EVDEV_DEVICE_KEYBOARD);
1316         case LIBINPUT_DEVICE_CAP_TOUCH:
1317                 return !!(device->seat_caps & EVDEV_DEVICE_TOUCH);
1318         default:
1319                 return 0;
1320         }
1321 }
1322
1323 int
1324 evdev_device_get_size(struct evdev_device *device,
1325                       double *width,
1326                       double *height)
1327 {
1328         const struct input_absinfo *x, *y;
1329
1330         x = libevdev_get_abs_info(device->evdev, ABS_X);
1331         y = libevdev_get_abs_info(device->evdev, ABS_Y);
1332
1333         if (!x || !y || device->abs.fake_resolution ||
1334             !x->resolution || !y->resolution)
1335                 return -1;
1336
1337         *width = evdev_convert_to_mm(x, x->maximum);
1338         *height = evdev_convert_to_mm(y, y->maximum);
1339
1340         return 0;
1341 }
1342
1343 void
1344 evdev_post_scroll(struct evdev_device *device,
1345                   uint64_t time,
1346                   double dx,
1347                   double dy)
1348 {
1349         if (dy <= -device->scroll.threshold || dy >= device->scroll.threshold)
1350                 device->scroll.direction |= (1 << LIBINPUT_POINTER_AXIS_SCROLL_VERTICAL);
1351
1352         if (dx <= -device->scroll.threshold || dx >= device->scroll.threshold)
1353                 device->scroll.direction |= (1 << LIBINPUT_POINTER_AXIS_SCROLL_HORIZONTAL);
1354
1355         if (dy != 0.0 &&
1356             (device->scroll.direction & (1 << LIBINPUT_POINTER_AXIS_SCROLL_VERTICAL))) {
1357                 pointer_notify_axis(&device->base,
1358                                     time,
1359                                     LIBINPUT_POINTER_AXIS_SCROLL_VERTICAL,
1360                                     dy);
1361         }
1362
1363         if (dx != 0.0 &&
1364             (device->scroll.direction & (1 << LIBINPUT_POINTER_AXIS_SCROLL_HORIZONTAL))) {
1365                 pointer_notify_axis(&device->base,
1366                                     time,
1367                                     LIBINPUT_POINTER_AXIS_SCROLL_HORIZONTAL,
1368                                     dx);
1369         }
1370 }
1371
1372 void
1373 evdev_stop_scroll(struct evdev_device *device, uint64_t time)
1374 {
1375         /* terminate scrolling with a zero scroll event */
1376         if (device->scroll.direction & (1 << LIBINPUT_POINTER_AXIS_SCROLL_VERTICAL))
1377                 pointer_notify_axis(&device->base,
1378                                     time,
1379                                     LIBINPUT_POINTER_AXIS_SCROLL_VERTICAL,
1380                                     0);
1381         if (device->scroll.direction & (1 << LIBINPUT_POINTER_AXIS_SCROLL_HORIZONTAL))
1382                 pointer_notify_axis(&device->base,
1383                                     time,
1384                                     LIBINPUT_POINTER_AXIS_SCROLL_HORIZONTAL,
1385                                     0);
1386
1387         device->scroll.direction = 0;
1388 }
1389
1390 static void
1391 release_pressed_keys(struct evdev_device *device)
1392 {
1393         struct libinput *libinput = device->base.seat->libinput;
1394         uint64_t time;
1395         int code;
1396
1397         if ((time = libinput_now(libinput)) == 0)
1398                 return;
1399
1400         for (code = 0; code < KEY_CNT; code++) {
1401                 int count = get_key_down_count(device, code);
1402
1403                 if (count > 1) {
1404                         log_bug_libinput(libinput,
1405                                          "Key %d is down %d times.\n",
1406                                          code,
1407                                          count);
1408                 }
1409
1410                 while (get_key_down_count(device, code) > 0) {
1411                         switch (get_key_type(code)) {
1412                         case EVDEV_KEY_TYPE_NONE:
1413                                 break;
1414                         case EVDEV_KEY_TYPE_KEY:
1415                                 evdev_keyboard_notify_key(
1416                                         device,
1417                                         time,
1418                                         code,
1419                                         LIBINPUT_KEY_STATE_RELEASED);
1420                                 break;
1421                         case EVDEV_KEY_TYPE_BUTTON:
1422                                 evdev_pointer_notify_button(
1423                                         device,
1424                                         time,
1425                                         code,
1426                                         LIBINPUT_BUTTON_STATE_RELEASED);
1427                                 break;
1428                         }
1429                 }
1430         }
1431 }
1432
1433 void
1434 evdev_notify_suspended_device(struct evdev_device *device)
1435 {
1436         struct libinput_device *it;
1437
1438         if (device->suspended)
1439                 return;
1440
1441         list_for_each(it, &device->base.seat->devices_list, link) {
1442                 struct evdev_device *d = (struct evdev_device*)it;
1443                 if (it == &device->base)
1444                         continue;
1445
1446                 if (d->dispatch->interface->device_suspended)
1447                         d->dispatch->interface->device_suspended(d, device);
1448         }
1449
1450         device->suspended = 1;
1451 }
1452
1453 void
1454 evdev_notify_resumed_device(struct evdev_device *device)
1455 {
1456         struct libinput_device *it;
1457
1458         if (!device->suspended)
1459                 return;
1460
1461         list_for_each(it, &device->base.seat->devices_list, link) {
1462                 struct evdev_device *d = (struct evdev_device*)it;
1463                 if (it == &device->base)
1464                         continue;
1465
1466                 if (d->dispatch->interface->device_resumed)
1467                         d->dispatch->interface->device_resumed(d, device);
1468         }
1469
1470         device->suspended = 0;
1471 }
1472
1473 int
1474 evdev_device_suspend(struct evdev_device *device)
1475 {
1476         evdev_notify_suspended_device(device);
1477
1478         if (device->source) {
1479                 libinput_remove_source(device->base.seat->libinput,
1480                                        device->source);
1481                 device->source = NULL;
1482         }
1483
1484         release_pressed_keys(device);
1485
1486         if (device->mtdev) {
1487                 mtdev_close_delete(device->mtdev);
1488                 device->mtdev = NULL;
1489         }
1490
1491         if (device->fd != -1) {
1492                 close_restricted(device->base.seat->libinput, device->fd);
1493                 device->fd = -1;
1494         }
1495
1496         return 0;
1497 }
1498
1499 static int
1500 evdev_device_compare_syspath(struct evdev_device *device, int fd)
1501 {
1502         struct udev *udev = NULL;
1503         struct udev_device *udev_device = NULL;
1504         const char *syspath;
1505         struct stat st;
1506         int rc = 1;
1507
1508         udev = udev_new();
1509         if (!udev)
1510                 goto out;
1511
1512         if (fstat(fd, &st) < 0)
1513                 goto out;
1514
1515         udev_device = udev_device_new_from_devnum(udev, 'c', st.st_rdev);
1516         if (!device)
1517                 goto out;
1518
1519         syspath = udev_device_get_syspath(udev_device);
1520         rc = strcmp(syspath, device->syspath);
1521 out:
1522         if (udev_device)
1523                 udev_device_unref(udev_device);
1524         if (udev)
1525                 udev_unref(udev);
1526         return rc;
1527 }
1528
1529 int
1530 evdev_device_resume(struct evdev_device *device)
1531 {
1532         struct libinput *libinput = device->base.seat->libinput;
1533         int fd;
1534
1535         if (device->fd != -1)
1536                 return 0;
1537
1538         if (device->syspath == NULL)
1539                 return -ENODEV;
1540
1541         fd = open_restricted(libinput, device->devnode, O_RDWR | O_NONBLOCK);
1542
1543         if (fd < 0)
1544                 return -errno;
1545
1546         if (evdev_device_compare_syspath(device, fd)) {
1547                 close_restricted(libinput, fd);
1548                 return -ENODEV;
1549         }
1550
1551         device->fd = fd;
1552
1553         if (evdev_need_mtdev(device)) {
1554                 device->mtdev = mtdev_new_open(device->fd);
1555                 if (!device->mtdev)
1556                         return -ENODEV;
1557         }
1558
1559         device->source =
1560                 libinput_add_fd(libinput, fd, evdev_device_dispatch, device);
1561         if (!device->source) {
1562                 mtdev_close_delete(device->mtdev);
1563                 return -ENOMEM;
1564         }
1565
1566         memset(device->hw_key_mask, 0, sizeof(device->hw_key_mask));
1567
1568         evdev_notify_resumed_device(device);
1569
1570         return 0;
1571 }
1572
1573 void
1574 evdev_device_remove(struct evdev_device *device)
1575 {
1576         struct libinput_device *dev;
1577
1578         list_for_each(dev, &device->base.seat->devices_list, link) {
1579                 struct evdev_device *d = (struct evdev_device*)dev;;
1580                 if (dev == &device->base)
1581                         continue;
1582
1583                 if (d->dispatch->interface->device_removed)
1584                         d->dispatch->interface->device_removed(d, device);
1585         }
1586
1587         evdev_device_suspend(device);
1588
1589         /* A device may be removed while suspended. Free the syspath to
1590          * skip re-opening a different device with the same node */
1591         free(device->syspath);
1592         device->syspath = NULL;
1593
1594         list_remove(&device->base.link);
1595
1596         notify_removed_device(&device->base);
1597         libinput_device_unref(&device->base);
1598 }
1599
1600 void
1601 evdev_device_destroy(struct evdev_device *device)
1602 {
1603         struct evdev_dispatch *dispatch;
1604
1605         dispatch = device->dispatch;
1606         if (dispatch)
1607                 dispatch->interface->destroy(dispatch);
1608
1609         filter_destroy(device->pointer.filter);
1610         libinput_seat_unref(device->base.seat);
1611         libevdev_free(device->evdev);
1612         free(device->mt.slots);
1613         free(device->devnode);
1614         free(device->sysname);
1615         free(device->syspath);
1616         free(device);
1617 }