src/evdev.c

   1 /*
   2  * Copyright © 2010 Intel Corporation
   3  *
   4  * Permission to use, copy, modify, distribute, and sell this software and
   5  * its documentation for any purpose is hereby granted without fee, provided
   6  * that the above copyright notice appear in all copies and that both that
   7  * copyright notice and this permission notice appear in supporting
   8  * documentation, and that the name of the copyright holders not be used in
   9  * advertising or publicity pertaining to distribution of the software
  10  * without specific, written prior permission.  The copyright holders make
  11  * no representations about the suitability of this software for any
  12  * purpose.  It is provided "as is" without express or implied warranty.
  13  *
  14  * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS
  15  * SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
  16  * FITNESS, IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY
  17  * SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
  18  * RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF
  19  * CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
  20  * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  21  */
  22
  23 #include "config.h"
  24
  25 #include <errno.h>
  26 #include <stdlib.h>
  27 #include <string.h>
  28 #include <linux/input.h>
  29 #include <unistd.h>
  30 #include <fcntl.h>
  31 #include <mtdev.h>
  32 #include <assert.h>
  33
  34 #include "compositor.h"
  35 #include "evdev.h"
  36
  37 #define DEFAULT_AXIS_STEP_DISTANCE wl_fixed_from_int(10)
  38
  39 void
  40 evdev_led_update(struct evdev_device *device, enum weston_led leds)
  41 {
  42         static const struct {
  43                 enum weston_led weston;
  44                 int evdev;
  45         } map[] = {
  46                 { LED_NUM_LOCK, LED_NUML },
  47                 { LED_CAPS_LOCK, LED_CAPSL },
  48                 { LED_SCROLL_LOCK, LED_SCROLLL },
  49         };
  50         struct input_event ev[ARRAY_LENGTH(map) + 1];
  51         unsigned int i;
  52
  53         if (!(device->seat_caps & EVDEV_SEAT_KEYBOARD))
  54                 return;
  55
  56         memset(ev, 0, sizeof(ev));
  57         for (i = 0; i < ARRAY_LENGTH(map); i++) {
  58                 ev[i].type = EV_LED;
  59                 ev[i].code = map[i].evdev;
  60                 ev[i].value = !!(leds & map[i].weston);
  61         }
  62         ev[i].type = EV_SYN;
  63         ev[i].code = SYN_REPORT;
  64
  65         i = write(device->fd, ev, sizeof ev);
  66         (void)i; /* no, we really don't care about the return value */
  67 }
  68
  69 static void
  70 transform_absolute(struct evdev_device *device, int32_t *x, int32_t *y)
  71 {
  72        if (!device->abs.apply_calibration) {
  73                *x = device->abs.x;
  74                *y = device->abs.y;
  75                return;
  76        } else {
  77                *x = device->abs.x * device->abs.calibration[0] +
  78                        device->abs.y * device->abs.calibration[1] +
  79                        device->abs.calibration[2];
  80
  81                *y = device->abs.x * device->abs.calibration[3] +
  82                        device->abs.y * device->abs.calibration[4] +
  83                        device->abs.calibration[5];
  84        }
  85 }
  86
  87 static void
  88 evdev_flush_pending_event(struct evdev_device *device, uint32_t time)
  89 {
  90         struct weston_seat *master = device->seat;
  91         wl_fixed_t x, y;
  92         int32_t cx, cy;
  93         int slot, seat_slot;
  94
  95         slot = device->mt.slot;
  96         switch (device->pending_event) {
  97         case EVDEV_NONE:
  98                 return;
  99         case EVDEV_RELATIVE_MOTION:
 100                 notify_motion(master, time, device->rel.dx, device->rel.dy);
 101                 device->rel.dx = 0;
 102                 device->rel.dy = 0;
 103                 break;
 104         case EVDEV_ABSOLUTE_MT_DOWN:
 105                 if (device->output == NULL)
 106                         break;
 107                 weston_output_transform_coordinate(device->output,
 108                                                    wl_fixed_from_int(device->mt.slots[slot].x),
 109                                                    wl_fixed_from_int(device->mt.slots[slot].y),
 110                                                    &x, &y);
 111                 seat_slot = ffs(~master->slot_map) - 1;
 112                 device->mt.slots[slot].seat_slot = seat_slot;
 113                 master->slot_map |= 1 << seat_slot;
 114
 115                 notify_touch(master, time, seat_slot, x, y, WL_TOUCH_DOWN);
 116                 break;
 117         case EVDEV_ABSOLUTE_MT_MOTION:
 118                 if (device->output == NULL)
 119                         break;
 120                 weston_output_transform_coordinate(device->output,
 121                                                    wl_fixed_from_int(device->mt.slots[slot].x),
 122                                                    wl_fixed_from_int(device->mt.slots[slot].y),
 123                                                    &x, &y);
 124                 seat_slot = device->mt.slots[slot].seat_slot;
 125                 notify_touch(master, time, seat_slot, x, y, WL_TOUCH_MOTION);
 126                 break;
 127         case EVDEV_ABSOLUTE_MT_UP:
 128                 seat_slot = device->mt.slots[slot].seat_slot;
 129                 master->slot_map &= ~(1 << seat_slot);
 130                 notify_touch(master, time, seat_slot, 0, 0, WL_TOUCH_UP);
 131                 break;
 132         case EVDEV_ABSOLUTE_TOUCH_DOWN:
 133                 if (device->output == NULL)
 134                         break;
 135                 transform_absolute(device, &cx, &cy);
 136                 weston_output_transform_coordinate(device->output,
 137                                                    wl_fixed_from_int(cx),
 138                                                    wl_fixed_from_int(cy),
 139                                                    &x, &y);
 140                 seat_slot = ffs(~master->slot_map) - 1;
 141                 device->abs.seat_slot = seat_slot;
 142                 master->slot_map |= 1 << seat_slot;
 143                 notify_touch(master, time, seat_slot, x, y, WL_TOUCH_DOWN);
 144                 break;
 145         case EVDEV_ABSOLUTE_MOTION:
 146                 if (device->output == NULL)
 147                         break;
 148                 transform_absolute(device, &cx, &cy);
 149                 weston_output_transform_coordinate(device->output,
 150                                                    wl_fixed_from_int(cx),
 151                                                    wl_fixed_from_int(cy),
 152                                                    &x, &y);
 153
 154                 if (device->seat_caps & EVDEV_SEAT_TOUCH)
 155                         notify_touch(master, time, device->abs.seat_slot,
 156                                      x, y, WL_TOUCH_MOTION);
 157                 else if (device->seat_caps & EVDEV_SEAT_POINTER)
 158                         notify_motion_absolute(master, time, x, y);
 159                 break;
 160         case EVDEV_ABSOLUTE_TOUCH_UP:
 161                 seat_slot = device->abs.seat_slot;
 162                 master->slot_map &= ~(1 << seat_slot);
 163                 notify_touch(master, time, seat_slot, 0, 0, WL_TOUCH_UP);
 164                 break;
 165         default:
 166                 assert(0 && "Unknown pending event type");
 167         }
 168
 169         device->pending_event = EVDEV_NONE;
 170 }
 171
 172 static void
 173 evdev_process_touch_button(struct evdev_device *device, int time, int value)
 174 {
 175         if (device->pending_event != EVDEV_NONE &&
 176             device->pending_event != EVDEV_ABSOLUTE_MOTION)
 177                 evdev_flush_pending_event(device, time);
 178
 179         device->pending_event = (value ?
 180                                  EVDEV_ABSOLUTE_TOUCH_DOWN :
 181                                  EVDEV_ABSOLUTE_TOUCH_UP);
 182 }
 183
 184 static inline void
 185 evdev_process_key(struct evdev_device *device, struct input_event *e, int time)
 186 {
 187         /* ignore kernel key repeat */
 188         if (e->value == 2)
 189                 return;
 190
 191         if (e->code == BTN_TOUCH) {
 192                 if (!device->is_mt)
 193                         evdev_process_touch_button(device, time, e->value);
 194                 return;
 195         }
 196
 197         evdev_flush_pending_event(device, time);
 198
 199         switch (e->code) {
 200         case BTN_LEFT:
 201         case BTN_RIGHT:
 202         case BTN_MIDDLE:
 203         case BTN_SIDE:
 204         case BTN_EXTRA:
 205         case BTN_FORWARD:
 206         case BTN_BACK:
 207         case BTN_TASK:
 208                 notify_button(device->seat,
 209                               time, e->code,
 210                               e->value ? WL_POINTER_BUTTON_STATE_PRESSED :
 211                                          WL_POINTER_BUTTON_STATE_RELEASED);
 212                 break;
 213
 214         default:
 215                 notify_key(device->seat,
 216                            time, e->code,
 217                            e->value ? WL_KEYBOARD_KEY_STATE_PRESSED :
 218                                       WL_KEYBOARD_KEY_STATE_RELEASED,
 219                            STATE_UPDATE_AUTOMATIC);
 220                 break;
 221         }
 222 }
 223
 224 static void
 225 evdev_process_touch(struct evdev_device *device,
 226                     struct input_event *e,
 227                     uint32_t time)
 228 {
 229         int screen_width, screen_height;
 230
 231         if (device->output == NULL)
 232                 return;
 233
 234         screen_width = device->output->current_mode->width;
 235         screen_height = device->output->current_mode->height;
 236
 237         switch (e->code) {
 238         case ABS_MT_SLOT:
 239                 evdev_flush_pending_event(device, time);
 240                 device->mt.slot = e->value;
 241                 break;
 242         case ABS_MT_TRACKING_ID:
 243                 if (device->pending_event != EVDEV_NONE &&
 244                     device->pending_event != EVDEV_ABSOLUTE_MT_MOTION)
 245                         evdev_flush_pending_event(device, time);
 246                 if (e->value >= 0)
 247                         device->pending_event = EVDEV_ABSOLUTE_MT_DOWN;
 248                 else
 249                         device->pending_event = EVDEV_ABSOLUTE_MT_UP;
 250                 break;
 251         case ABS_MT_POSITION_X:
 252                 device->mt.slots[device->mt.slot].x =
 253                         (e->value - device->abs.min_x) * screen_width /
 254                         (device->abs.max_x - device->abs.min_x);
 255                 if (device->pending_event == EVDEV_NONE)
 256                         device->pending_event = EVDEV_ABSOLUTE_MT_MOTION;
 257                 break;
 258         case ABS_MT_POSITION_Y:
 259                 device->mt.slots[device->mt.slot].y =
 260                         (e->value - device->abs.min_y) * screen_height /
 261                         (device->abs.max_y - device->abs.min_y);
 262                 if (device->pending_event == EVDEV_NONE)
 263                         device->pending_event = EVDEV_ABSOLUTE_MT_MOTION;
 264                 break;
 265         }
 266 }
 267
 268 static inline void
 269 evdev_process_absolute_motion(struct evdev_device *device,
 270                               struct input_event *e)
 271 {
 272         int screen_width, screen_height;
 273
 274         if (device->output == NULL)
 275                 return;
 276
 277         screen_width = device->output->current_mode->width;
 278         screen_height = device->output->current_mode->height;
 279
 280         switch (e->code) {
 281         case ABS_X:
 282                 device->abs.x =
 283                         (e->value - device->abs.min_x) * screen_width /
 284                         (device->abs.max_x - device->abs.min_x);
 285                 if (device->pending_event == EVDEV_NONE)
 286                         device->pending_event = EVDEV_ABSOLUTE_MOTION;
 287                 break;
 288         case ABS_Y:
 289                 device->abs.y =
 290                         (e->value - device->abs.min_y) * screen_height /
 291                         (device->abs.max_y - device->abs.min_y);
 292                 if (device->pending_event == EVDEV_NONE)
 293                         device->pending_event = EVDEV_ABSOLUTE_MOTION;
 294                 break;
 295         }
 296 }
 297
 298 static inline void
 299 evdev_process_relative(struct evdev_device *device,
 300                        struct input_event *e, uint32_t time)
 301 {
 302         switch (e->code) {
 303         case REL_X:
 304                 if (device->pending_event != EVDEV_RELATIVE_MOTION)
 305                         evdev_flush_pending_event(device, time);
 306                 device->rel.dx += wl_fixed_from_int(e->value);
 307                 device->pending_event = EVDEV_RELATIVE_MOTION;
 308                 break;
 309         case REL_Y:
 310                 if (device->pending_event != EVDEV_RELATIVE_MOTION)
 311                         evdev_flush_pending_event(device, time);
 312                 device->rel.dy += wl_fixed_from_int(e->value);
 313                 device->pending_event = EVDEV_RELATIVE_MOTION;
 314                 break;
 315         case REL_WHEEL:
 316                 evdev_flush_pending_event(device, time);
 317                 switch (e->value) {
 318                 case -1:
 319                         /* Scroll down */
 320                 case 1:
 321                         /* Scroll up */
 322                         notify_axis(device->seat,
 323                                     time,
 324                                     WL_POINTER_AXIS_VERTICAL_SCROLL,
 325                                     -1 * e->value * DEFAULT_AXIS_STEP_DISTANCE);
 326                         break;
 327                 default:
 328                         break;
 329                 }
 330                 break;
 331         case REL_HWHEEL:
 332                 evdev_flush_pending_event(device, time);
 333                 switch (e->value) {
 334                 case -1:
 335                         /* Scroll left */
 336                 case 1:
 337                         /* Scroll right */
 338                         notify_axis(device->seat,
 339                                     time,
 340                                     WL_POINTER_AXIS_HORIZONTAL_SCROLL,
 341                                     e->value * DEFAULT_AXIS_STEP_DISTANCE);
 342                         break;
 343                 default:
 344                         break;
 345
 346                 }
 347         }
 348 }
 349
 350 static inline void
 351 evdev_process_absolute(struct evdev_device *device,
 352                        struct input_event *e,
 353                        uint32_t time)
 354 {
 355         if (device->is_mt) {
 356                 evdev_process_touch(device, e, time);
 357         } else {
 358                 evdev_process_absolute_motion(device, e);
 359         }
 360 }
 361
 362 static void
 363 fallback_process(struct evdev_dispatch *dispatch,
 364                  struct evdev_device *device,
 365                  struct input_event *event,
 366                  uint32_t time)
 367 {
 368         switch (event->type) {
 369         case EV_REL:
 370                 evdev_process_relative(device, event, time);
 371                 break;
 372         case EV_ABS:
 373                 evdev_process_absolute(device, event, time);
 374                 break;
 375         case EV_KEY:
 376                 evdev_process_key(device, event, time);
 377                 break;
 378         case EV_SYN:
 379                 evdev_flush_pending_event(device, time);
 380                 break;
 381         }
 382 }
 383
 384 static void
 385 fallback_destroy(struct evdev_dispatch *dispatch)
 386 {
 387         free(dispatch);
 388 }
 389
 390 struct evdev_dispatch_interface fallback_interface = {
 391         fallback_process,
 392         fallback_destroy
 393 };
 394
 395 static struct evdev_dispatch *
 396 fallback_dispatch_create(void)
 397 {
 398         struct evdev_dispatch *dispatch = malloc(sizeof *dispatch);
 399         if (dispatch == NULL)
 400                 return NULL;
 401
 402         dispatch->interface = &fallback_interface;
 403
 404         return dispatch;
 405 }
 406
 407 static void
 408 evdev_process_events(struct evdev_device *device,
 409                      struct input_event *ev, int count)
 410 {
 411         struct evdev_dispatch *dispatch = device->dispatch;
 412         struct input_event *e, *end;
 413         uint32_t time = 0;
 414
 415         e = ev;
 416         end = e + count;
 417         for (e = ev; e < end; e++) {
 418                 time = e->time.tv_sec * 1000 + e->time.tv_usec / 1000;
 419
 420                 dispatch->interface->process(dispatch, device, e, time);
 421         }
 422 }
 423
 424 static int
 425 evdev_device_data(int fd, uint32_t mask, void *data)
 426 {
 427         struct weston_compositor *ec;
 428         struct evdev_device *device = data;
 429         struct input_event ev[32];
 430         int len;
 431
 432         ec = device->seat->compositor;
 433         if (!ec->session_active)
 434                 return 1;
 435
 436         /* If the compositor is repainting, this function is called only once
 437          * per frame and we have to process all the events available on the
 438          * fd, otherwise there will be input lag. */
 439         do {
 440                 if (device->mtdev)
 441                         len = mtdev_get(device->mtdev, fd, ev,
 442                                         ARRAY_LENGTH(ev)) *
 443                                 sizeof (struct input_event);
 444                 else
 445                         len = read(fd, &ev, sizeof ev);
 446
 447                 if (len < 0 || len % sizeof ev[0] != 0) {
 448                         if (len < 0 && errno != EAGAIN && errno != EINTR) {
 449                                 weston_log("device %s died\n",
 450                                            device->devnode);
 451                                 wl_event_source_remove(device->source);
 452                                 device->source = NULL;
 453                         }
 454
 455                         return 1;
 456                 }
 457
 458                 evdev_process_events(device, ev, len / sizeof ev[0]);
 459
 460         } while (len > 0);
 461
 462         return 1;
 463 }
 464
 465 static int
 466 evdev_configure_device(struct evdev_device *device)
 467 {
 468         struct input_absinfo absinfo;
 469         unsigned long ev_bits[NBITS(EV_MAX)];
 470         unsigned long abs_bits[NBITS(ABS_MAX)];
 471         unsigned long rel_bits[NBITS(REL_MAX)];
 472         unsigned long key_bits[NBITS(KEY_MAX)];
 473         int has_abs, has_rel, has_mt;
 474         int has_button, has_keyboard, has_touch;
 475         unsigned int i;
 476
 477         has_rel = 0;
 478         has_abs = 0;
 479         has_mt = 0;
 480         has_button = 0;
 481         has_keyboard = 0;
 482         has_touch = 0;
 483
 484         ioctl(device->fd, EVIOCGBIT(0, sizeof(ev_bits)), ev_bits);
 485         if (TEST_BIT(ev_bits, EV_ABS)) {
 486                 ioctl(device->fd, EVIOCGBIT(EV_ABS, sizeof(abs_bits)),
 487                       abs_bits);
 488
 489                 if (TEST_BIT(abs_bits, ABS_X)) {
 490                         ioctl(device->fd, EVIOCGABS(ABS_X), &absinfo);
 491                         device->abs.min_x = absinfo.minimum;
 492                         device->abs.max_x = absinfo.maximum;
 493                         has_abs = 1;
 494                 }
 495                 if (TEST_BIT(abs_bits, ABS_Y)) {
 496                         ioctl(device->fd, EVIOCGABS(ABS_Y), &absinfo);
 497                         device->abs.min_y = absinfo.minimum;
 498                         device->abs.max_y = absinfo.maximum;
 499                         has_abs = 1;
 500                 }
 501                 /* We only handle the slotted Protocol B in weston.
 502                    Devices with ABS_MT_POSITION_* but not ABS_MT_SLOT
 503                    require mtdev for conversion. */
 504                 if (TEST_BIT(abs_bits, ABS_MT_POSITION_X) &&
 505                     TEST_BIT(abs_bits, ABS_MT_POSITION_Y)) {
 506                         ioctl(device->fd, EVIOCGABS(ABS_MT_POSITION_X),
 507                               &absinfo);
 508                         device->abs.min_x = absinfo.minimum;
 509                         device->abs.max_x = absinfo.maximum;
 510                         ioctl(device->fd, EVIOCGABS(ABS_MT_POSITION_Y),
 511                               &absinfo);
 512                         device->abs.min_y = absinfo.minimum;
 513                         device->abs.max_y = absinfo.maximum;
 514                         device->is_mt = 1;
 515                         has_touch = 1;
 516                         has_mt = 1;
 517
 518                         if (!TEST_BIT(abs_bits, ABS_MT_SLOT)) {
 519                                 device->mtdev = mtdev_new_open(device->fd);
 520                                 if (!device->mtdev) {
 521                                         weston_log("mtdev required but failed to open for %s\n",
 522                                                    device->devnode);
 523                                         return 0;
 524                                 }
 525                                 device->mt.slot = device->mtdev->caps.slot.value;
 526                         } else {
 527                                 ioctl(device->fd, EVIOCGABS(ABS_MT_SLOT),
 528                                       &absinfo);
 529                                 device->mt.slot = absinfo.value;
 530                         }
 531                 }
 532         }
 533         if (TEST_BIT(ev_bits, EV_REL)) {
 534                 ioctl(device->fd, EVIOCGBIT(EV_REL, sizeof(rel_bits)),
 535                       rel_bits);
 536                 if (TEST_BIT(rel_bits, REL_X) || TEST_BIT(rel_bits, REL_Y))
 537                         has_rel = 1;
 538         }
 539         if (TEST_BIT(ev_bits, EV_KEY)) {
 540                 ioctl(device->fd, EVIOCGBIT(EV_KEY, sizeof(key_bits)),
 541                       key_bits);
 542                 if (TEST_BIT(key_bits, BTN_TOOL_FINGER) &&
 543                     !TEST_BIT(key_bits, BTN_TOOL_PEN) &&
 544                     (has_abs || has_mt)) {
 545                         device->dispatch = evdev_touchpad_create(device);
 546                         weston_log("input device %s, %s is a touchpad\n",
 547                                    device->devname, device->devnode);
 548                 }
 549                 for (i = KEY_ESC; i < KEY_MAX; i++) {
 550                         if (i >= BTN_MISC && i < KEY_OK)
 551                                 continue;
 552                         if (TEST_BIT(key_bits, i)) {
 553                                 has_keyboard = 1;
 554                                 break;
 555                         }
 556                 }
 557                 if (TEST_BIT(key_bits, BTN_TOUCH))
 558                         has_touch = 1;
 559                 for (i = BTN_MISC; i < BTN_JOYSTICK; i++) {
 560                         if (TEST_BIT(key_bits, i)) {
 561                                 has_button = 1;
 562                                 break;
 563                         }
 564                 }
 565         }
 566         if (TEST_BIT(ev_bits, EV_LED))
 567                 has_keyboard = 1;
 568
 569         if ((has_abs || has_rel) && has_button) {
 570                 weston_seat_init_pointer(device->seat);
 571                 device->seat_caps |= EVDEV_SEAT_POINTER;
 572                 weston_log("input device %s, %s is a pointer caps =%s%s%s\n",
 573                            device->devname, device->devnode,
 574                            has_abs ? " absolute-motion" : "",
 575                            has_rel ? " relative-motion": "",
 576                            has_button ? " button" : "");
 577         }
 578         if (has_keyboard) {
 579                 if (weston_seat_init_keyboard(device->seat, NULL) < 0)
 580                         return -1;
 581                 device->seat_caps |= EVDEV_SEAT_KEYBOARD;
 582                 weston_log("input device %s, %s is a keyboard\n",
 583                            device->devname, device->devnode);
 584         }
 585         if (has_touch && !has_button) {
 586                 weston_seat_init_touch(device->seat);
 587                 device->seat_caps |= EVDEV_SEAT_TOUCH;
 588                 weston_log("input device %s, %s is a touch device\n",
 589                            device->devname, device->devnode);
 590         }
 591
 592         return 0;
 593 }
 594
 595 static void
 596 notify_output_destroy(struct wl_listener *listener, void *data)
 597 {
 598         struct evdev_device *device =
 599                 container_of(listener,
 600                              struct evdev_device, output_destroy_listener);
 601         struct weston_compositor *c = device->seat->compositor;
 602         struct weston_output *output;
 603
 604         if (!device->output_name && !wl_list_empty(&c->output_list)) {
 605                 output = container_of(c->output_list.next,
 606                                       struct weston_output, link);
 607                 evdev_device_set_output(device, output);
 608         } else {
 609                 device->output = NULL;
 610         }
 611 }
 612
 613 void
 614 evdev_device_set_output(struct evdev_device *device,
 615                         struct weston_output *output)
 616 {
 617         if (device->output_destroy_listener.notify) {
 618                 wl_list_remove(&device->output_destroy_listener.link);
 619                 device->output_destroy_listener.notify = NULL;
 620         }
 621
 622         device->output = output;
 623         device->output_destroy_listener.notify = notify_output_destroy;
 624         wl_signal_add(&output->destroy_signal,
 625                       &device->output_destroy_listener);
 626 }
 627
 628 struct evdev_device *
 629 evdev_device_create(struct weston_seat *seat, const char *path, int device_fd)
 630 {
 631         struct evdev_device *device;
 632         struct weston_compositor *ec;
 633         char devname[256] = "unknown";
 634
 635         device = zalloc(sizeof *device);
 636         if (device == NULL)
 637                 return NULL;
 638
 639         ec = seat->compositor;
 640         device->seat = seat;
 641         device->seat_caps = 0;
 642         device->is_mt = 0;
 643         device->mtdev = NULL;
 644         device->devnode = strdup(path);
 645         device->mt.slot = -1;
 646         device->rel.dx = 0;
 647         device->rel.dy = 0;
 648         device->dispatch = NULL;
 649         device->fd = device_fd;
 650         device->pending_event = EVDEV_NONE;
 651         wl_list_init(&device->link);
 652
 653         ioctl(device->fd, EVIOCGNAME(sizeof(devname)), devname);
 654         devname[sizeof(devname) - 1] = '\0';
 655         device->devname = strdup(devname);
 656
 657         if (evdev_configure_device(device) == -1)
 658                 goto err;
 659
 660         if (device->seat_caps == 0) {
 661                 evdev_device_destroy(device);
 662                 return EVDEV_UNHANDLED_DEVICE;
 663         }
 664
 665         /* If the dispatch was not set up use the fallback. */
 666         if (device->dispatch == NULL)
 667                 device->dispatch = fallback_dispatch_create();
 668         if (device->dispatch == NULL)
 669                 goto err;
 670
 671         device->source = wl_event_loop_add_fd(ec->input_loop, device->fd,
 672                                               WL_EVENT_READABLE,
 673                                               evdev_device_data, device);
 674         if (device->source == NULL)
 675                 goto err;
 676
 677         return device;
 678
 679 err:
 680         evdev_device_destroy(device);
 681         return NULL;
 682 }
 683
 684 void
 685 evdev_device_destroy(struct evdev_device *device)
 686 {
 687         struct evdev_dispatch *dispatch;
 688
 689         if (device->seat_caps & EVDEV_SEAT_POINTER)
 690                 weston_seat_release_pointer(device->seat);
 691         if (device->seat_caps & EVDEV_SEAT_KEYBOARD)
 692                 weston_seat_release_keyboard(device->seat);
 693         if (device->seat_caps & EVDEV_SEAT_TOUCH)
 694                 weston_seat_release_touch(device->seat);
 695
 696         dispatch = device->dispatch;
 697         if (dispatch)
 698                 dispatch->interface->destroy(dispatch);
 699
 700         if (device->source)
 701                 wl_event_source_remove(device->source);
 702         if (device->output)
 703                 wl_list_remove(&device->output_destroy_listener.link);
 704         wl_list_remove(&device->link);
 705         if (device->mtdev)
 706                 mtdev_close_delete(device->mtdev);
 707         close(device->fd);
 708         free(device->devname);
 709         free(device->devnode);
 710         free(device->output_name);
 711         free(device);
 712 }
 713
 714 void
 715 evdev_notify_keyboard_focus(struct weston_seat *seat,
 716                             struct wl_list *evdev_devices)
 717 {
 718         struct evdev_device *device;
 719         struct wl_array keys;
 720         unsigned int i, set;
 721         char evdev_keys[(KEY_CNT + 7) / 8];
 722         char all_keys[(KEY_CNT + 7) / 8];
 723         uint32_t *k;
 724         int ret;
 725
 726         if (!seat->keyboard_device_count > 0)
 727                 return;
 728
 729         memset(all_keys, 0, sizeof all_keys);
 730         wl_list_for_each(device, evdev_devices, link) {
 731                 memset(evdev_keys, 0, sizeof evdev_keys);
 732                 ret = ioctl(device->fd,
 733                             EVIOCGKEY(sizeof evdev_keys), evdev_keys);
 734                 if (ret < 0) {
 735                         weston_log("failed to get keys for device %s\n",
 736                                 device->devnode);
 737                         continue;
 738                 }
 739                 for (i = 0; i < ARRAY_LENGTH(evdev_keys); i++)
 740                         all_keys[i] |= evdev_keys[i];
 741         }
 742
 743         wl_array_init(&keys);
 744         for (i = 0; i < KEY_CNT; i++) {
 745                 set = all_keys[i >> 3] & (1 << (i & 7));
 746                 if (set) {
 747                         k = wl_array_add(&keys, sizeof *k);
 748                         *k = i;
 749                 }
 750         }
 751
 752         notify_keyboard_focus_in(seat, &keys, STATE_UPDATE_AUTOMATIC);
 753
 754         wl_array_release(&keys);
 755 }