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 <stdio.h>
  24 #include <stdlib.h>
  25 #include <string.h>
  26 #include <linux/input.h>
  27 #include <unistd.h>
  28 #include <fcntl.h>
  29 #include <mtdev.h>
  30
  31 #include "compositor.h"
  32 #include "evdev.h"
  33
  34 struct evdev_input {
  35         struct weston_input_device base;
  36         struct wl_list devices_list;
  37         struct udev_monitor *udev_monitor;
  38         char *seat_id;
  39 };
  40
  41 #define MAX_SLOTS 16
  42
  43 struct evdev_input_device {
  44         struct evdev_input *master;
  45         struct wl_list link;
  46         struct wl_event_source *source;
  47         struct weston_output *output;
  48         char *devnode;
  49         int fd;
  50         struct {
  51                 int min_x, max_x, min_y, max_y;
  52                 int old_x, old_y, reset_x, reset_y;
  53                 int32_t x, y;
  54         } abs;
  55
  56         struct {
  57                 int slot;
  58                 int32_t x[MAX_SLOTS];
  59                 int32_t y[MAX_SLOTS];
  60         } mt;
  61         struct mtdev *mtdev;
  62
  63         struct {
  64                 int dx, dy;
  65         } rel;
  66
  67         int type; /* event type flags */
  68
  69         int is_touchpad, is_mt;
  70 };
  71
  72 /* event type flags */
  73 #define EVDEV_ABSOLUTE_MOTION           (1 << 0)
  74 #define EVDEV_ABSOLUTE_MT_DOWN          (1 << 1)
  75 #define EVDEV_ABSOLUTE_MT_MOTION        (1 << 2)
  76 #define EVDEV_ABSOLUTE_MT_UP            (1 << 3)
  77 #define EVDEV_RELATIVE_MOTION           (1 << 4)
  78
  79 static inline void
  80 evdev_process_key(struct evdev_input_device *device,
  81                         struct input_event *e, int time)
  82 {
  83         if (e->value == 2)
  84                 return;
  85
  86         switch (e->code) {
  87         case BTN_TOOL_PEN:
  88         case BTN_TOOL_RUBBER:
  89         case BTN_TOOL_BRUSH:
  90         case BTN_TOOL_PENCIL:
  91         case BTN_TOOL_AIRBRUSH:
  92         case BTN_TOOL_FINGER:
  93         case BTN_TOOL_MOUSE:
  94         case BTN_TOOL_LENS:
  95                 if (device->is_touchpad)
  96                 {
  97                         device->abs.reset_x = 1;
  98                         device->abs.reset_y = 1;
  99                 }
 100                 break;
 101         case BTN_TOUCH:
 102                 /* Multitouch touchscreen devices might not send individually
 103                  * button events each time a new finger is down. So we don't
 104                  * send notification for such devices and we solve the button
 105                  * case emulating on compositor side. */
 106                 if (device->is_mt)
 107                         break;
 108
 109                 /* Treat BTN_TOUCH from devices that only have BTN_TOUCH as
 110                  * BTN_LEFT */
 111                 e->code = BTN_LEFT;
 112                 /* Intentional fallthrough! */
 113         case BTN_LEFT:
 114         case BTN_RIGHT:
 115         case BTN_MIDDLE:
 116         case BTN_SIDE:
 117         case BTN_EXTRA:
 118         case BTN_FORWARD:
 119         case BTN_BACK:
 120         case BTN_TASK:
 121                 notify_button(&device->master->base.input_device,
 122                               time, e->code, e->value);
 123                 break;
 124
 125         default:
 126                 notify_key(&device->master->base.input_device,
 127                            time, e->code, e->value);
 128                 break;
 129         }
 130 }
 131
 132 static void
 133 evdev_process_touch(struct evdev_input_device *device,
 134                     struct input_event *e)
 135 {
 136         const int screen_width = device->output->current->width;
 137         const int screen_height = device->output->current->height;
 138
 139         switch (e->code) {
 140         case ABS_MT_SLOT:
 141                 device->mt.slot = e->value;
 142                 break;
 143         case ABS_MT_TRACKING_ID:
 144                 if (e->value >= 0)
 145                         device->type |= EVDEV_ABSOLUTE_MT_DOWN;
 146                 else
 147                         device->type |= EVDEV_ABSOLUTE_MT_UP;
 148                 break;
 149         case ABS_MT_POSITION_X:
 150                 device->mt.x[device->mt.slot] =
 151                         (e->value - device->abs.min_x) * screen_width /
 152                         (device->abs.max_x - device->abs.min_x) +
 153                         device->output->x;
 154                 device->type |= EVDEV_ABSOLUTE_MT_MOTION;
 155                 break;
 156         case ABS_MT_POSITION_Y:
 157                 device->mt.y[device->mt.slot] =
 158                         (e->value - device->abs.min_y) * screen_height /
 159                         (device->abs.max_y - device->abs.min_y) +
 160                         device->output->y;
 161                 device->type |= EVDEV_ABSOLUTE_MT_MOTION;
 162                 break;
 163         }
 164 }
 165
 166 static inline void
 167 evdev_process_absolute_motion(struct evdev_input_device *device,
 168                               struct input_event *e)
 169 {
 170         const int screen_width = device->output->current->width;
 171         const int screen_height = device->output->current->height;
 172
 173         switch (e->code) {
 174         case ABS_X:
 175                 device->abs.x =
 176                         (e->value - device->abs.min_x) * screen_width /
 177                         (device->abs.max_x - device->abs.min_x) +
 178                         device->output->x;
 179                 device->type |= EVDEV_ABSOLUTE_MOTION;
 180                 break;
 181         case ABS_Y:
 182                 device->abs.y =
 183                         (e->value - device->abs.min_y) * screen_height /
 184                         (device->abs.max_y - device->abs.min_y) +
 185                         device->output->y;
 186                 device->type |= EVDEV_ABSOLUTE_MOTION;
 187                 break;
 188         }
 189 }
 190
 191 static inline void
 192 evdev_process_absolute_motion_touchpad(struct evdev_input_device *device,
 193                                        struct input_event *e)
 194 {
 195         /* FIXME: Make this configurable somehow. */
 196         const int touchpad_speed = 700;
 197
 198         switch (e->code) {
 199         case ABS_X:
 200                 e->value -= device->abs.min_x;
 201                 if (device->abs.reset_x)
 202                         device->abs.reset_x = 0;
 203                 else {
 204                         device->rel.dx =
 205                                 (e->value - device->abs.old_x) *
 206                                 touchpad_speed /
 207                                 (device->abs.max_x - device->abs.min_x);
 208                 }
 209                 device->abs.old_x = e->value;
 210                 device->type |= EVDEV_RELATIVE_MOTION;
 211                 break;
 212         case ABS_Y:
 213                 e->value -= device->abs.min_y;
 214                 if (device->abs.reset_y)
 215                         device->abs.reset_y = 0;
 216                 else {
 217                         device->rel.dy =
 218                                 (e->value - device->abs.old_y) *
 219                                 touchpad_speed /
 220                                 /* maybe use x size here to have the same scale? */
 221                                 (device->abs.max_y - device->abs.min_y);
 222                 }
 223                 device->abs.old_y = e->value;
 224                 device->type |= EVDEV_RELATIVE_MOTION;
 225                 break;
 226         }
 227 }
 228
 229 static inline void
 230 evdev_process_relative(struct evdev_input_device *device,
 231                               struct input_event *e, uint32_t time)
 232 {
 233         switch (e->code) {
 234         case REL_X:
 235                 device->rel.dx += e->value;
 236                 device->type |= EVDEV_RELATIVE_MOTION;
 237                 break;
 238         case REL_Y:
 239                 device->rel.dy += e->value;
 240                 device->type |= EVDEV_RELATIVE_MOTION;
 241                 break;
 242         case REL_WHEEL:
 243                 notify_axis(&device->master->base.input_device,
 244                               time,
 245                               WL_INPUT_DEVICE_AXIS_VERTICAL_SCROLL, e->value);
 246                 break;
 247         case REL_HWHEEL:
 248                 notify_axis(&device->master->base.input_device,
 249                               time,
 250                               WL_INPUT_DEVICE_AXIS_HORIZONTAL_SCROLL, e->value);
 251                 break;
 252         }
 253 }
 254
 255 static inline void
 256 evdev_process_absolute(struct evdev_input_device *device,
 257                        struct input_event *e)
 258 {
 259         if (device->is_touchpad) {
 260                 evdev_process_absolute_motion_touchpad(device, e);
 261         } else if (device->is_mt) {
 262                 evdev_process_touch(device, e);
 263         } else {
 264                 evdev_process_absolute_motion(device, e);
 265         }
 266 }
 267
 268 static int
 269 is_motion_event(struct input_event *e)
 270 {
 271         switch (e->type) {
 272         case EV_REL:
 273                 switch (e->code) {
 274                 case REL_X:
 275                 case REL_Y:
 276                         return 1;
 277                 }
 278         case EV_ABS:
 279                 switch (e->code) {
 280                 case ABS_X:
 281                 case ABS_Y:
 282                 case ABS_MT_POSITION_X:
 283                 case ABS_MT_POSITION_Y:
 284                         return 1;
 285                 }
 286         }
 287
 288         return 0;
 289 }
 290
 291 static void
 292 evdev_flush_motion(struct evdev_input_device *device, uint32_t time)
 293 {
 294         struct wl_input_device *master = &device->master->base.input_device;
 295
 296         if (!device->type)
 297                 return;
 298
 299         if (device->type & EVDEV_RELATIVE_MOTION) {
 300                 notify_motion(master, time,
 301                               master->x + device->rel.dx,
 302                               master->y + device->rel.dy);
 303                 device->type &= ~EVDEV_RELATIVE_MOTION;
 304                 device->rel.dx = 0;
 305                 device->rel.dy = 0;
 306         }
 307         if (device->type & EVDEV_ABSOLUTE_MT_DOWN) {
 308                 notify_touch(master, time,
 309                              device->mt.slot,
 310                              device->mt.x[device->mt.slot],
 311                              device->mt.y[device->mt.slot],
 312                              WL_INPUT_DEVICE_TOUCH_DOWN);
 313                 device->type &= ~EVDEV_ABSOLUTE_MT_DOWN;
 314                 device->type &= ~EVDEV_ABSOLUTE_MT_MOTION;
 315         }
 316         if (device->type & EVDEV_ABSOLUTE_MT_MOTION) {
 317                 notify_touch(master, time,
 318                              device->mt.slot,
 319                              device->mt.x[device->mt.slot],
 320                              device->mt.y[device->mt.slot],
 321                              WL_INPUT_DEVICE_TOUCH_MOTION);
 322                 device->type &= ~EVDEV_ABSOLUTE_MT_DOWN;
 323                 device->type &= ~EVDEV_ABSOLUTE_MT_MOTION;
 324         }
 325         if (device->type & EVDEV_ABSOLUTE_MT_UP) {
 326                 notify_touch(master, time, device->mt.slot, 0, 0,
 327                              WL_INPUT_DEVICE_TOUCH_UP);
 328                 device->type &= ~EVDEV_ABSOLUTE_MT_UP;
 329         }
 330         if (device->type & EVDEV_ABSOLUTE_MOTION) {
 331                 notify_motion(master, time, device->abs.x, device->abs.y);
 332                 device->type &= ~EVDEV_ABSOLUTE_MOTION;
 333         }
 334 }
 335
 336 static void
 337 evdev_process_events(struct evdev_input_device *device,
 338                      struct input_event *ev, int count)
 339 {
 340         struct input_event *e, *end;
 341         uint32_t time = 0;
 342
 343         device->type = 0;
 344
 345         e = ev;
 346         end = e + count;
 347         for (e = ev; e < end; e++) {
 348                 time = e->time.tv_sec * 1000 + e->time.tv_usec / 1000;
 349
 350                 /* we try to minimize the amount of notifications to be
 351                  * forwarded to the compositor, so we accumulate motion
 352                  * events and send as a bunch */
 353                 if (!is_motion_event(e))
 354                         evdev_flush_motion(device, time);
 355                 switch (e->type) {
 356                 case EV_REL:
 357                         evdev_process_relative(device, e, time);
 358                         break;
 359                 case EV_ABS:
 360                         evdev_process_absolute(device, e);
 361                         break;
 362                 case EV_KEY:
 363                         evdev_process_key(device, e, time);
 364                         break;
 365                 }
 366         }
 367
 368         evdev_flush_motion(device, time);
 369 }
 370
 371 static int
 372 evdev_input_device_data(int fd, uint32_t mask, void *data)
 373 {
 374         struct weston_compositor *ec;
 375         struct evdev_input_device *device = data;
 376         struct input_event ev[32];
 377         int len;
 378
 379         ec = device->master->base.compositor;
 380         if (!ec->focus)
 381                 return 1;
 382
 383         /* If the compositor is repainting, this function is called only once
 384          * per frame and we have to process all the events available on the
 385          * fd, otherwise there will be input lag. */
 386         do {
 387                 if (device->mtdev)
 388                         len = mtdev_get(device->mtdev, fd, ev,
 389                                         ARRAY_LENGTH(ev)) *
 390                                 sizeof (struct input_event);
 391                 else
 392                         len = read(fd, &ev, sizeof ev);
 393
 394                 if (len < 0 || len % sizeof ev[0] != 0) {
 395                         /* FIXME: call device_removed when errno is ENODEV. */
 396                         return 1;
 397                 }
 398
 399                 evdev_process_events(device, ev, len / sizeof ev[0]);
 400
 401         } while (len > 0);
 402
 403         return 1;
 404 }
 405
 406 /* copied from udev/extras/input_id/input_id.c */
 407 /* we must use this kernel-compatible implementation */
 408 #define BITS_PER_LONG (sizeof(unsigned long) * 8)
 409 #define NBITS(x) ((((x)-1)/BITS_PER_LONG)+1)
 410 #define OFF(x)  ((x)%BITS_PER_LONG)
 411 #define BIT(x)  (1UL<<OFF(x))
 412 #define LONG(x) ((x)/BITS_PER_LONG)
 413 #define TEST_BIT(array, bit)    ((array[LONG(bit)] >> OFF(bit)) & 1)
 414 /* end copied */
 415
 416 static int
 417 evdev_configure_device(struct evdev_input_device *device)
 418 {
 419         struct input_absinfo absinfo;
 420         unsigned long ev_bits[NBITS(EV_MAX)];
 421         unsigned long abs_bits[NBITS(ABS_MAX)];
 422         unsigned long key_bits[NBITS(KEY_MAX)];
 423         int has_key, has_abs;
 424
 425         has_key = 0;
 426         has_abs = 0;
 427
 428         ioctl(device->fd, EVIOCGBIT(0, sizeof(ev_bits)), ev_bits);
 429         if (TEST_BIT(ev_bits, EV_ABS)) {
 430                 has_abs = 1;
 431
 432                 ioctl(device->fd, EVIOCGBIT(EV_ABS, sizeof(abs_bits)),
 433                       abs_bits);
 434                 if (TEST_BIT(abs_bits, ABS_X)) {
 435                         ioctl(device->fd, EVIOCGABS(ABS_X), &absinfo);
 436                         device->abs.min_x = absinfo.minimum;
 437                         device->abs.max_x = absinfo.maximum;
 438                 }
 439                 if (TEST_BIT(abs_bits, ABS_Y)) {
 440                         ioctl(device->fd, EVIOCGABS(ABS_Y), &absinfo);
 441                         device->abs.min_y = absinfo.minimum;
 442                         device->abs.max_y = absinfo.maximum;
 443                 }
 444                 if (TEST_BIT(abs_bits, ABS_MT_SLOT)) {
 445                         device->is_mt = 1;
 446                         device->mt.slot = 0;
 447                 }
 448         }
 449         if (TEST_BIT(ev_bits, EV_KEY)) {
 450                 has_key = 1;
 451                 ioctl(device->fd, EVIOCGBIT(EV_KEY, sizeof(key_bits)),
 452                       key_bits);
 453                 if (TEST_BIT(key_bits, BTN_TOOL_FINGER) &&
 454                              !TEST_BIT(key_bits, BTN_TOOL_PEN))
 455                         device->is_touchpad = 1;
 456         }
 457
 458         /* This rule tries to catch accelerometer devices and opt out. We may
 459          * want to adjust the protocol later adding a proper event for dealing
 460          * with accelerometers and implement here accordingly */
 461         if (has_abs && !has_key)
 462                 return -1;
 463
 464         return 0;
 465 }
 466
 467 static struct evdev_input_device *
 468 evdev_input_device_create(struct evdev_input *master,
 469                           struct wl_display *display, const char *path)
 470 {
 471         struct evdev_input_device *device;
 472         struct weston_compositor *ec;
 473
 474         device = malloc(sizeof *device);
 475         if (device == NULL)
 476                 return NULL;
 477
 478         ec = master->base.compositor;
 479         device->output =
 480                 container_of(ec->output_list.next, struct weston_output, link);
 481
 482         device->master = master;
 483         device->is_touchpad = 0;
 484         device->is_mt = 0;
 485         device->mtdev = NULL;
 486         device->devnode = strdup(path);
 487         device->mt.slot = -1;
 488         device->rel.dx = 0;
 489         device->rel.dy = 0;
 490
 491         /* Use non-blocking mode so that we can loop on read on
 492          * evdev_input_device_data() until all events on the fd are
 493          * read.  mtdev_get() also expects this. */
 494         device->fd = open(path, O_RDONLY | O_NONBLOCK);
 495         if (device->fd < 0)
 496                 goto err0;
 497
 498         if (evdev_configure_device(device) == -1)
 499                 goto err1;
 500
 501         if (device->is_mt) {
 502                 device->mtdev = mtdev_new_open(device->fd);
 503                 if (!device->mtdev)
 504                         fprintf(stderr, "mtdev failed to open for %s\n", path);
 505         }
 506
 507         device->source = wl_event_loop_add_fd(ec->input_loop, device->fd,
 508                                               WL_EVENT_READABLE,
 509                                               evdev_input_device_data, device);
 510         if (device->source == NULL)
 511                 goto err1;
 512
 513         wl_list_insert(master->devices_list.prev, &device->link);
 514
 515         return device;
 516
 517 err1:
 518         close(device->fd);
 519 err0:
 520         free(device->devnode);
 521         free(device);
 522         return NULL;
 523 }
 524
 525 static const char default_seat[] = "seat0";
 526
 527 static void
 528 device_added(struct udev_device *udev_device, struct evdev_input *master)
 529 {
 530         struct weston_compositor *c;
 531         const char *devnode;
 532         const char *device_seat;
 533
 534         device_seat = udev_device_get_property_value(udev_device, "ID_SEAT");
 535         if (!device_seat)
 536                 device_seat = default_seat;
 537
 538         if (strcmp(device_seat, master->seat_id))
 539                 return;
 540
 541         c = master->base.compositor;
 542         devnode = udev_device_get_devnode(udev_device);
 543         evdev_input_device_create(master, c->wl_display, devnode);
 544 }
 545
 546 static void
 547 device_removed(struct evdev_input_device *device)
 548 {
 549         wl_event_source_remove(device->source);
 550         wl_list_remove(&device->link);
 551         if (device->mtdev)
 552                 mtdev_close_delete(device->mtdev);
 553         close(device->fd);
 554         free(device->devnode);
 555         free(device);
 556 }
 557
 558 void
 559 evdev_add_devices(struct udev *udev, struct weston_input_device *input_base)
 560 {
 561         struct evdev_input *input = (struct evdev_input *) input_base;
 562         struct udev_enumerate *e;
 563         struct udev_list_entry *entry;
 564         struct udev_device *device;
 565         const char *path;
 566
 567         e = udev_enumerate_new(udev);
 568         udev_enumerate_add_match_subsystem(e, "input");
 569         udev_enumerate_scan_devices(e);
 570         udev_list_entry_foreach(entry, udev_enumerate_get_list_entry(e)) {
 571                 path = udev_list_entry_get_name(entry);
 572                 device = udev_device_new_from_syspath(udev, path);
 573
 574                 if (strncmp("event", udev_device_get_sysname(device), 5) != 0)
 575                         continue;
 576
 577                 device_added(device, input);
 578
 579                 udev_device_unref(device);
 580         }
 581         udev_enumerate_unref(e);
 582
 583         if (wl_list_empty(&input->devices_list)) {
 584                 fprintf(stderr,
 585                         "warning: no input devices on entering Weston. "
 586                         "Possible causes:\n"
 587                         "\t- no permissions to read /dev/input/event*\n"
 588                         "\t- seats misconfigured "
 589                         "(Weston backend option 'seat', "
 590                         "udev device property ID_SEAT)\n");
 591         }
 592 }
 593
 594 static int
 595 evdev_udev_handler(int fd, uint32_t mask, void *data)
 596 {
 597         struct evdev_input *master = data;
 598         struct udev_device *udev_device;
 599         struct evdev_input_device *device, *next;
 600         const char *action;
 601         const char *devnode;
 602
 603         udev_device = udev_monitor_receive_device(master->udev_monitor);
 604         if (!udev_device)
 605                 return 1;
 606
 607         action = udev_device_get_action(udev_device);
 608         if (action) {
 609                 if (strncmp("event", udev_device_get_sysname(udev_device), 5) != 0)
 610                         return 0;
 611
 612                 if (!strcmp(action, "add")) {
 613                         device_added(udev_device, master);
 614                 }
 615                 else if (!strcmp(action, "remove")) {
 616                         devnode = udev_device_get_devnode(udev_device);
 617                         wl_list_for_each_safe(device, next,
 618                                               &master->devices_list, link)
 619                                 if (!strcmp(device->devnode, devnode)) {
 620                                         device_removed(device);
 621                                         break;
 622                                 }
 623                 }
 624         }
 625         udev_device_unref(udev_device);
 626
 627         return 0;
 628 }
 629
 630 static int
 631 evdev_config_udev_monitor(struct udev *udev, struct evdev_input *master)
 632 {
 633         struct wl_event_loop *loop;
 634         struct weston_compositor *c = master->base.compositor;
 635
 636         master->udev_monitor = udev_monitor_new_from_netlink(udev, "udev");
 637         if (!master->udev_monitor) {
 638                 fprintf(stderr, "udev: failed to create the udev monitor\n");
 639                 return 0;
 640         }
 641
 642         udev_monitor_filter_add_match_subsystem_devtype(master->udev_monitor,
 643                         "input", NULL);
 644
 645         if (udev_monitor_enable_receiving(master->udev_monitor)) {
 646                 fprintf(stderr, "udev: failed to bind the udev monitor\n");
 647                 return 0;
 648         }
 649
 650         loop = wl_display_get_event_loop(c->wl_display);
 651         wl_event_loop_add_fd(loop, udev_monitor_get_fd(master->udev_monitor),
 652                              WL_EVENT_READABLE, evdev_udev_handler, master);
 653
 654         return 1;
 655 }
 656
 657 void
 658 evdev_input_create(struct weston_compositor *c, struct udev *udev,
 659                    const char *seat)
 660 {
 661         struct evdev_input *input;
 662
 663         input = malloc(sizeof *input);
 664         if (input == NULL)
 665                 return;
 666
 667         memset(input, 0, sizeof *input);
 668         weston_input_device_init(&input->base, c);
 669
 670         wl_list_init(&input->devices_list);
 671         input->seat_id = strdup(seat);
 672         if (!evdev_config_udev_monitor(udev, input)) {
 673                 free(input->seat_id);
 674                 free(input);
 675                 return;
 676         }
 677
 678         evdev_add_devices(udev, &input->base);
 679
 680         c->input_device = &input->base.input_device;
 681 }
 682
 683 void
 684 evdev_remove_devices(struct weston_input_device *input_base)
 685 {
 686         struct evdev_input *input = (struct evdev_input *) input_base;
 687         struct evdev_input_device *device, *next;
 688
 689         wl_list_for_each_safe(device, next, &input->devices_list, link)
 690                 device_removed(device);
 691 }
 692
 693 void
 694 evdev_input_destroy(struct weston_input_device *input_base)
 695 {
 696         struct evdev_input *input = (struct evdev_input *) input_base;
 697
 698         evdev_remove_devices(input_base);
 699         wl_list_remove(&input->base.link);
 700         free(input->seat_id);
 701         free(input);
 702 }