2 * Copyright © 2010 Intel Corporation
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.
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.
26 #include <linux/input.h>
31 #include "compositor.h"
33 #include "launcher-util.h"
36 struct weston_input_device base;
37 struct wl_list devices_list;
38 struct udev_monitor *udev_monitor;
39 struct wl_event_source *udev_monitor_source;
45 struct evdev_input_device {
46 struct evdev_input *master;
48 struct wl_event_source *source;
49 struct weston_output *output;
53 int min_x, max_x, min_y, max_y;
54 int old_x, old_y, reset_x, reset_y;
69 int type; /* event type flags */
71 int is_touchpad, is_mt;
74 /* event type flags */
75 #define EVDEV_ABSOLUTE_MOTION (1 << 0)
76 #define EVDEV_ABSOLUTE_MT_DOWN (1 << 1)
77 #define EVDEV_ABSOLUTE_MT_MOTION (1 << 2)
78 #define EVDEV_ABSOLUTE_MT_UP (1 << 3)
79 #define EVDEV_RELATIVE_MOTION (1 << 4)
82 evdev_process_key(struct evdev_input_device *device,
83 struct input_event *e, int time)
93 case BTN_TOOL_AIRBRUSH:
97 if (device->is_touchpad)
99 device->abs.reset_x = 1;
100 device->abs.reset_y = 1;
104 /* Multitouch touchscreen devices might not send individually
105 * button events each time a new finger is down. So we don't
106 * send notification for such devices and we solve the button
107 * case emulating on compositor side. */
111 /* Treat BTN_TOUCH from devices that only have BTN_TOUCH as
114 /* Intentional fallthrough! */
123 notify_button(&device->master->base.input_device,
124 time, e->code, e->value);
128 notify_key(&device->master->base.input_device,
129 time, e->code, e->value);
135 evdev_process_touch(struct evdev_input_device *device,
136 struct input_event *e)
138 const int screen_width = device->output->current->width;
139 const int screen_height = device->output->current->height;
143 device->mt.slot = e->value;
145 case ABS_MT_TRACKING_ID:
147 device->type |= EVDEV_ABSOLUTE_MT_DOWN;
149 device->type |= EVDEV_ABSOLUTE_MT_UP;
151 case ABS_MT_POSITION_X:
152 device->mt.x[device->mt.slot] =
153 (e->value - device->abs.min_x) * screen_width /
154 (device->abs.max_x - device->abs.min_x) +
156 device->type |= EVDEV_ABSOLUTE_MT_MOTION;
158 case ABS_MT_POSITION_Y:
159 device->mt.y[device->mt.slot] =
160 (e->value - device->abs.min_y) * screen_height /
161 (device->abs.max_y - device->abs.min_y) +
163 device->type |= EVDEV_ABSOLUTE_MT_MOTION;
169 evdev_process_absolute_motion(struct evdev_input_device *device,
170 struct input_event *e)
172 const int screen_width = device->output->current->width;
173 const int screen_height = device->output->current->height;
178 (e->value - device->abs.min_x) * screen_width /
179 (device->abs.max_x - device->abs.min_x) +
181 device->type |= EVDEV_ABSOLUTE_MOTION;
185 (e->value - device->abs.min_y) * screen_height /
186 (device->abs.max_y - device->abs.min_y) +
188 device->type |= EVDEV_ABSOLUTE_MOTION;
194 evdev_process_absolute_motion_touchpad(struct evdev_input_device *device,
195 struct input_event *e)
197 /* FIXME: Make this configurable somehow. */
198 const int touchpad_speed = 700;
202 e->value -= device->abs.min_x;
203 if (device->abs.reset_x)
204 device->abs.reset_x = 0;
207 (e->value - device->abs.old_x) *
209 (device->abs.max_x - device->abs.min_x);
211 device->abs.old_x = e->value;
212 device->type |= EVDEV_RELATIVE_MOTION;
215 e->value -= device->abs.min_y;
216 if (device->abs.reset_y)
217 device->abs.reset_y = 0;
220 (e->value - device->abs.old_y) *
222 /* maybe use x size here to have the same scale? */
223 (device->abs.max_y - device->abs.min_y);
225 device->abs.old_y = e->value;
226 device->type |= EVDEV_RELATIVE_MOTION;
232 evdev_process_relative(struct evdev_input_device *device,
233 struct input_event *e, uint32_t time)
237 device->rel.dx += e->value;
238 device->type |= EVDEV_RELATIVE_MOTION;
241 device->rel.dy += e->value;
242 device->type |= EVDEV_RELATIVE_MOTION;
245 notify_axis(&device->master->base.input_device,
247 WL_INPUT_DEVICE_AXIS_VERTICAL_SCROLL, e->value);
250 notify_axis(&device->master->base.input_device,
252 WL_INPUT_DEVICE_AXIS_HORIZONTAL_SCROLL, e->value);
258 evdev_process_absolute(struct evdev_input_device *device,
259 struct input_event *e)
261 if (device->is_touchpad) {
262 evdev_process_absolute_motion_touchpad(device, e);
263 } else if (device->is_mt) {
264 evdev_process_touch(device, e);
266 evdev_process_absolute_motion(device, e);
271 is_motion_event(struct input_event *e)
284 case ABS_MT_POSITION_X:
285 case ABS_MT_POSITION_Y:
294 evdev_flush_motion(struct evdev_input_device *device, uint32_t time)
296 struct wl_input_device *master = &device->master->base.input_device;
301 if (device->type & EVDEV_RELATIVE_MOTION) {
302 notify_motion(master, time,
303 master->x + device->rel.dx,
304 master->y + device->rel.dy);
305 device->type &= ~EVDEV_RELATIVE_MOTION;
309 if (device->type & EVDEV_ABSOLUTE_MT_DOWN) {
310 notify_touch(master, time,
312 device->mt.x[device->mt.slot],
313 device->mt.y[device->mt.slot],
314 WL_INPUT_DEVICE_TOUCH_DOWN);
315 device->type &= ~EVDEV_ABSOLUTE_MT_DOWN;
316 device->type &= ~EVDEV_ABSOLUTE_MT_MOTION;
318 if (device->type & EVDEV_ABSOLUTE_MT_MOTION) {
319 notify_touch(master, time,
321 device->mt.x[device->mt.slot],
322 device->mt.y[device->mt.slot],
323 WL_INPUT_DEVICE_TOUCH_MOTION);
324 device->type &= ~EVDEV_ABSOLUTE_MT_DOWN;
325 device->type &= ~EVDEV_ABSOLUTE_MT_MOTION;
327 if (device->type & EVDEV_ABSOLUTE_MT_UP) {
328 notify_touch(master, time, device->mt.slot, 0, 0,
329 WL_INPUT_DEVICE_TOUCH_UP);
330 device->type &= ~EVDEV_ABSOLUTE_MT_UP;
332 if (device->type & EVDEV_ABSOLUTE_MOTION) {
333 notify_motion(master, time, device->abs.x, device->abs.y);
334 device->type &= ~EVDEV_ABSOLUTE_MOTION;
339 evdev_process_events(struct evdev_input_device *device,
340 struct input_event *ev, int count)
342 struct input_event *e, *end;
349 for (e = ev; e < end; e++) {
350 time = e->time.tv_sec * 1000 + e->time.tv_usec / 1000;
352 /* we try to minimize the amount of notifications to be
353 * forwarded to the compositor, so we accumulate motion
354 * events and send as a bunch */
355 if (!is_motion_event(e))
356 evdev_flush_motion(device, time);
359 evdev_process_relative(device, e, time);
362 evdev_process_absolute(device, e);
365 evdev_process_key(device, e, time);
370 evdev_flush_motion(device, time);
374 evdev_input_device_data(int fd, uint32_t mask, void *data)
376 struct weston_compositor *ec;
377 struct evdev_input_device *device = data;
378 struct input_event ev[32];
381 ec = device->master->base.compositor;
385 /* If the compositor is repainting, this function is called only once
386 * per frame and we have to process all the events available on the
387 * fd, otherwise there will be input lag. */
390 len = mtdev_get(device->mtdev, fd, ev,
392 sizeof (struct input_event);
394 len = read(fd, &ev, sizeof ev);
396 if (len < 0 || len % sizeof ev[0] != 0) {
397 /* FIXME: call device_removed when errno is ENODEV. */
401 evdev_process_events(device, ev, len / sizeof ev[0]);
408 /* copied from udev/extras/input_id/input_id.c */
409 /* we must use this kernel-compatible implementation */
410 #define BITS_PER_LONG (sizeof(unsigned long) * 8)
411 #define NBITS(x) ((((x)-1)/BITS_PER_LONG)+1)
412 #define OFF(x) ((x)%BITS_PER_LONG)
413 #define BIT(x) (1UL<<OFF(x))
414 #define LONG(x) ((x)/BITS_PER_LONG)
415 #define TEST_BIT(array, bit) ((array[LONG(bit)] >> OFF(bit)) & 1)
419 evdev_configure_device(struct evdev_input_device *device)
421 struct input_absinfo absinfo;
422 unsigned long ev_bits[NBITS(EV_MAX)];
423 unsigned long abs_bits[NBITS(ABS_MAX)];
424 unsigned long key_bits[NBITS(KEY_MAX)];
425 int has_key, has_abs;
430 ioctl(device->fd, EVIOCGBIT(0, sizeof(ev_bits)), ev_bits);
431 if (TEST_BIT(ev_bits, EV_ABS)) {
434 ioctl(device->fd, EVIOCGBIT(EV_ABS, sizeof(abs_bits)),
436 if (TEST_BIT(abs_bits, ABS_X)) {
437 ioctl(device->fd, EVIOCGABS(ABS_X), &absinfo);
438 device->abs.min_x = absinfo.minimum;
439 device->abs.max_x = absinfo.maximum;
441 if (TEST_BIT(abs_bits, ABS_Y)) {
442 ioctl(device->fd, EVIOCGABS(ABS_Y), &absinfo);
443 device->abs.min_y = absinfo.minimum;
444 device->abs.max_y = absinfo.maximum;
446 if (TEST_BIT(abs_bits, ABS_MT_SLOT)) {
451 if (TEST_BIT(ev_bits, EV_KEY)) {
453 ioctl(device->fd, EVIOCGBIT(EV_KEY, sizeof(key_bits)),
455 if (TEST_BIT(key_bits, BTN_TOOL_FINGER) &&
456 !TEST_BIT(key_bits, BTN_TOOL_PEN))
457 device->is_touchpad = 1;
460 /* This rule tries to catch accelerometer devices and opt out. We may
461 * want to adjust the protocol later adding a proper event for dealing
462 * with accelerometers and implement here accordingly */
463 if (has_abs && !has_key)
469 static struct evdev_input_device *
470 evdev_input_device_create(struct evdev_input *master,
471 struct wl_display *display, const char *path)
473 struct evdev_input_device *device;
474 struct weston_compositor *ec;
476 device = malloc(sizeof *device);
480 ec = master->base.compositor;
482 container_of(ec->output_list.next, struct weston_output, link);
484 device->master = master;
485 device->is_touchpad = 0;
487 device->mtdev = NULL;
488 device->devnode = strdup(path);
489 device->mt.slot = -1;
493 /* Use non-blocking mode so that we can loop on read on
494 * evdev_input_device_data() until all events on the fd are
495 * read. mtdev_get() also expects this. */
496 device->fd = weston_launcher_open(ec, path, O_RDONLY | O_NONBLOCK);
500 if (evdev_configure_device(device) == -1)
504 device->mtdev = mtdev_new_open(device->fd);
506 fprintf(stderr, "mtdev failed to open for %s\n", path);
509 device->source = wl_event_loop_add_fd(ec->input_loop, device->fd,
511 evdev_input_device_data, device);
512 if (device->source == NULL)
515 wl_list_insert(master->devices_list.prev, &device->link);
522 free(device->devnode);
527 static const char default_seat[] = "seat0";
530 device_added(struct udev_device *udev_device, struct evdev_input *master)
532 struct weston_compositor *c;
534 const char *device_seat;
536 device_seat = udev_device_get_property_value(udev_device, "ID_SEAT");
538 device_seat = default_seat;
540 if (strcmp(device_seat, master->seat_id))
543 c = master->base.compositor;
544 devnode = udev_device_get_devnode(udev_device);
545 evdev_input_device_create(master, c->wl_display, devnode);
549 device_removed(struct evdev_input_device *device)
551 wl_event_source_remove(device->source);
552 wl_list_remove(&device->link);
554 mtdev_close_delete(device->mtdev);
556 free(device->devnode);
561 evdev_notify_keyboard_focus(struct evdev_input *input)
563 struct evdev_input_device *device;
564 struct wl_array keys;
566 char evdev_keys[(KEY_CNT + 7) / 8], all_keys[(KEY_CNT + 7) / 8];
570 memset(all_keys, 0, sizeof all_keys);
571 wl_list_for_each(device, &input->devices_list, link) {
572 memset(evdev_keys, 0, sizeof evdev_keys);
573 ret = ioctl(device->fd,
574 EVIOCGKEY(sizeof evdev_keys), evdev_keys);
576 fprintf(stderr, "failed to get keys for device %s\n",
580 for (i = 0; i < ARRAY_LENGTH(evdev_keys); i++)
581 all_keys[i] |= evdev_keys[i];
584 wl_array_init(&keys);
585 for (i = 0; i < KEY_CNT; i++) {
586 set = all_keys[i >> 3] & (1 << (i & 7));
588 k = wl_array_add(&keys, sizeof *k);
593 notify_keyboard_focus(&input->base.input_device,
594 weston_compositor_get_time(), &keys);
596 wl_array_release(&keys);
600 evdev_add_devices(struct udev *udev, struct weston_input_device *input_base)
602 struct evdev_input *input = (struct evdev_input *) input_base;
603 struct udev_enumerate *e;
604 struct udev_list_entry *entry;
605 struct udev_device *device;
606 const char *path, *sysname;
608 e = udev_enumerate_new(udev);
609 udev_enumerate_add_match_subsystem(e, "input");
610 udev_enumerate_scan_devices(e);
611 udev_list_entry_foreach(entry, udev_enumerate_get_list_entry(e)) {
612 path = udev_list_entry_get_name(entry);
613 device = udev_device_new_from_syspath(udev, path);
615 sysname = udev_device_get_sysname(device);
616 if (strncmp("event", sysname, 5) != 0) {
617 udev_device_unref(device);
621 device_added(device, input);
623 udev_device_unref(device);
625 udev_enumerate_unref(e);
627 evdev_notify_keyboard_focus(input);
629 if (wl_list_empty(&input->devices_list)) {
631 "warning: no input devices on entering Weston. "
633 "\t- no permissions to read /dev/input/event*\n"
634 "\t- seats misconfigured "
635 "(Weston backend option 'seat', "
636 "udev device property ID_SEAT)\n");
641 evdev_udev_handler(int fd, uint32_t mask, void *data)
643 struct evdev_input *master = data;
644 struct udev_device *udev_device;
645 struct evdev_input_device *device, *next;
649 udev_device = udev_monitor_receive_device(master->udev_monitor);
653 action = udev_device_get_action(udev_device);
655 if (strncmp("event", udev_device_get_sysname(udev_device), 5) != 0)
658 if (!strcmp(action, "add")) {
659 device_added(udev_device, master);
661 else if (!strcmp(action, "remove")) {
662 devnode = udev_device_get_devnode(udev_device);
663 wl_list_for_each_safe(device, next,
664 &master->devices_list, link)
665 if (!strcmp(device->devnode, devnode)) {
666 device_removed(device);
671 udev_device_unref(udev_device);
677 evdev_enable_udev_monitor(struct udev *udev, struct weston_input_device *input_base)
679 struct evdev_input *master = (struct evdev_input *) input_base;
680 struct wl_event_loop *loop;
681 struct weston_compositor *c = master->base.compositor;
684 master->udev_monitor = udev_monitor_new_from_netlink(udev, "udev");
685 if (!master->udev_monitor) {
686 fprintf(stderr, "udev: failed to create the udev monitor\n");
690 udev_monitor_filter_add_match_subsystem_devtype(master->udev_monitor,
693 if (udev_monitor_enable_receiving(master->udev_monitor)) {
694 fprintf(stderr, "udev: failed to bind the udev monitor\n");
695 udev_monitor_unref(master->udev_monitor);
699 loop = wl_display_get_event_loop(c->wl_display);
700 fd = udev_monitor_get_fd(master->udev_monitor);
701 master->udev_monitor_source =
702 wl_event_loop_add_fd(loop, fd, WL_EVENT_READABLE,
703 evdev_udev_handler, master);
704 if (!master->udev_monitor_source) {
705 udev_monitor_unref(master->udev_monitor);
713 evdev_disable_udev_monitor(struct weston_input_device *input_base)
715 struct evdev_input *input = (struct evdev_input *) input_base;
717 if (!input->udev_monitor)
720 udev_monitor_unref(input->udev_monitor);
721 input->udev_monitor = NULL;
722 wl_event_source_remove(input->udev_monitor_source);
723 input->udev_monitor_source = NULL;
727 evdev_input_create(struct weston_compositor *c, struct udev *udev,
730 struct evdev_input *input;
732 input = malloc(sizeof *input);
736 memset(input, 0, sizeof *input);
737 weston_input_device_init(&input->base, c);
739 wl_list_init(&input->devices_list);
740 input->seat_id = strdup(seat);
741 if (!evdev_enable_udev_monitor(udev, &input->base)) {
742 free(input->seat_id);
747 evdev_add_devices(udev, &input->base);
749 c->input_device = &input->base.input_device;
753 evdev_remove_devices(struct weston_input_device *input_base)
755 struct evdev_input *input = (struct evdev_input *) input_base;
756 struct evdev_input_device *device, *next;
758 wl_list_for_each_safe(device, next, &input->devices_list, link)
759 device_removed(device);
761 notify_keyboard_focus(&input->base.input_device,
762 weston_compositor_get_time(), NULL);
766 evdev_input_destroy(struct weston_input_device *input_base)
768 struct evdev_input *input = (struct evdev_input *) input_base;
770 evdev_remove_devices(input_base);
771 evdev_disable_udev_monitor(&input->base);
773 wl_list_remove(&input->base.link);
774 free(input->seat_id);