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.
28 #include <linux/input.h>
32 #include "compositor.h"
36 struct weston_input_device base;
37 struct wl_list devices_list;
38 struct udev_monitor *udev_monitor;
44 struct evdev_input_device {
45 struct evdev_input *master;
47 struct wl_event_source *source;
48 struct weston_output *output;
52 int min_x, max_x, min_y, max_y;
53 int old_x, old_y, reset_x, reset_y;
67 int type; /* event type flags */
69 int is_touchpad, is_mt;
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)
80 evdev_process_key(struct evdev_input_device *device,
81 struct input_event *e, int time)
91 case BTN_TOOL_AIRBRUSH:
95 if (device->is_touchpad)
97 device->abs.reset_x = 1;
98 device->abs.reset_y = 1;
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. */
109 /* Treat BTN_TOUCH from devices that only have BTN_TOUCH as
112 /* Intentional fallthrough! */
121 notify_button(&device->master->base.input_device,
122 time, e->code, e->value);
126 notify_key(&device->master->base.input_device,
127 time, e->code, e->value);
133 evdev_process_touch(struct evdev_input_device *device,
134 struct input_event *e)
136 const int screen_width = device->output->current->width;
137 const int screen_height = device->output->current->height;
141 device->mt.slot = e->value;
143 case ABS_MT_TRACKING_ID:
145 device->type |= EVDEV_ABSOLUTE_MT_DOWN;
147 device->type |= EVDEV_ABSOLUTE_MT_UP;
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) +
154 device->type |= EVDEV_ABSOLUTE_MT_MOTION;
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) +
161 device->type |= EVDEV_ABSOLUTE_MT_MOTION;
167 evdev_process_absolute_motion(struct evdev_input_device *device,
168 struct input_event *e)
170 const int screen_width = device->output->current->width;
171 const int screen_height = device->output->current->height;
176 (e->value - device->abs.min_x) * screen_width /
177 (device->abs.max_x - device->abs.min_x) +
179 device->type |= EVDEV_ABSOLUTE_MOTION;
183 (e->value - device->abs.min_y) * screen_height /
184 (device->abs.max_y - device->abs.min_y) +
186 device->type |= EVDEV_ABSOLUTE_MOTION;
192 evdev_process_absolute_motion_touchpad(struct evdev_input_device *device,
193 struct input_event *e)
195 /* FIXME: Make this configurable somehow. */
196 const int touchpad_speed = 700;
200 e->value -= device->abs.min_x;
201 if (device->abs.reset_x)
202 device->abs.reset_x = 0;
205 (e->value - device->abs.old_x) *
207 (device->abs.max_x - device->abs.min_x);
209 device->abs.old_x = e->value;
210 device->type |= EVDEV_RELATIVE_MOTION;
213 e->value -= device->abs.min_y;
214 if (device->abs.reset_y)
215 device->abs.reset_y = 0;
218 (e->value - device->abs.old_y) *
220 /* maybe use x size here to have the same scale? */
221 (device->abs.max_y - device->abs.min_y);
223 device->abs.old_y = e->value;
224 device->type |= EVDEV_RELATIVE_MOTION;
230 evdev_process_relative_motion(struct evdev_input_device *device,
231 struct input_event *e)
235 device->rel.dx += e->value;
236 device->type |= EVDEV_RELATIVE_MOTION;
239 device->rel.dy += e->value;
240 device->type |= EVDEV_RELATIVE_MOTION;
246 evdev_process_absolute(struct evdev_input_device *device,
247 struct input_event *e)
249 if (device->is_touchpad) {
250 evdev_process_absolute_motion_touchpad(device, e);
251 } else if (device->is_mt) {
252 evdev_process_touch(device, e);
254 evdev_process_absolute_motion(device, e);
259 is_motion_event(struct input_event *e)
272 case ABS_MT_POSITION_X:
273 case ABS_MT_POSITION_Y:
282 evdev_flush_motion(struct evdev_input_device *device, uint32_t time)
284 struct wl_input_device *master = &device->master->base.input_device;
289 if (device->type & EVDEV_RELATIVE_MOTION) {
290 notify_motion(master, time,
291 master->x + device->rel.dx,
292 master->y + device->rel.dy);
293 device->type &= ~EVDEV_RELATIVE_MOTION;
297 if (device->type & EVDEV_ABSOLUTE_MT_DOWN) {
298 notify_touch(master, time,
300 device->mt.x[device->mt.slot],
301 device->mt.y[device->mt.slot],
302 WL_INPUT_DEVICE_TOUCH_DOWN);
303 device->type &= ~EVDEV_ABSOLUTE_MT_DOWN;
304 device->type &= ~EVDEV_ABSOLUTE_MT_MOTION;
306 if (device->type & EVDEV_ABSOLUTE_MT_MOTION) {
307 notify_touch(master, time,
309 device->mt.x[device->mt.slot],
310 device->mt.y[device->mt.slot],
311 WL_INPUT_DEVICE_TOUCH_MOTION);
312 device->type &= ~EVDEV_ABSOLUTE_MT_DOWN;
313 device->type &= ~EVDEV_ABSOLUTE_MT_MOTION;
315 if (device->type & EVDEV_ABSOLUTE_MT_UP) {
316 notify_touch(master, time, device->mt.slot, 0, 0,
317 WL_INPUT_DEVICE_TOUCH_UP);
318 device->type &= ~EVDEV_ABSOLUTE_MT_UP;
320 if (device->type & EVDEV_ABSOLUTE_MOTION) {
321 notify_motion(master, time, device->abs.x, device->abs.y);
322 device->type &= ~EVDEV_ABSOLUTE_MOTION;
327 evdev_input_device_data(int fd, uint32_t mask, void *data)
329 struct weston_compositor *ec;
330 struct evdev_input_device *device = data;
331 struct input_event ev[8], *e, *end;
335 ec = device->master->base.compositor;
339 len = read(fd, &ev, sizeof ev);
340 if (len < 0 || len % sizeof e[0] != 0) {
341 /* FIXME: call device_removed when errno is ENODEV. */;
348 end = (void *) ev + len;
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_motion(device, e);
362 evdev_process_absolute(device, e);
365 evdev_process_key(device, e, time);
370 evdev_flush_motion(device, time);
376 /* copied from udev/extras/input_id/input_id.c */
377 /* we must use this kernel-compatible implementation */
378 #define BITS_PER_LONG (sizeof(unsigned long) * 8)
379 #define NBITS(x) ((((x)-1)/BITS_PER_LONG)+1)
380 #define OFF(x) ((x)%BITS_PER_LONG)
381 #define BIT(x) (1UL<<OFF(x))
382 #define LONG(x) ((x)/BITS_PER_LONG)
383 #define TEST_BIT(array, bit) ((array[LONG(bit)] >> OFF(bit)) & 1)
387 evdev_configure_device(struct evdev_input_device *device)
389 struct input_absinfo absinfo;
390 unsigned long ev_bits[NBITS(EV_MAX)];
391 unsigned long abs_bits[NBITS(ABS_MAX)];
392 unsigned long key_bits[NBITS(KEY_MAX)];
393 int has_key, has_abs;
398 ioctl(device->fd, EVIOCGBIT(0, sizeof(ev_bits)), ev_bits);
399 if (TEST_BIT(ev_bits, EV_ABS)) {
402 ioctl(device->fd, EVIOCGBIT(EV_ABS, sizeof(abs_bits)),
404 if (TEST_BIT(abs_bits, ABS_X)) {
405 ioctl(device->fd, EVIOCGABS(ABS_X), &absinfo);
406 device->abs.min_x = absinfo.minimum;
407 device->abs.max_x = absinfo.maximum;
409 if (TEST_BIT(abs_bits, ABS_Y)) {
410 ioctl(device->fd, EVIOCGABS(ABS_Y), &absinfo);
411 device->abs.min_y = absinfo.minimum;
412 device->abs.max_y = absinfo.maximum;
414 if (TEST_BIT(abs_bits, ABS_MT_SLOT)) {
419 if (TEST_BIT(ev_bits, EV_KEY)) {
421 ioctl(device->fd, EVIOCGBIT(EV_KEY, sizeof(key_bits)),
423 if (TEST_BIT(key_bits, BTN_TOOL_FINGER) &&
424 !TEST_BIT(key_bits, BTN_TOOL_PEN))
425 device->is_touchpad = 1;
428 /* This rule tries to catch accelerometer devices and opt out. We may
429 * want to adjust the protocol later adding a proper event for dealing
430 * with accelerometers and implement here accordingly */
431 if (has_abs && !has_key)
437 static struct evdev_input_device *
438 evdev_input_device_create(struct evdev_input *master,
439 struct wl_display *display, const char *path)
441 struct evdev_input_device *device;
442 struct wl_event_loop *loop;
443 struct weston_compositor *ec;
444 uid_t saved_uid, uid, euid;
446 device = malloc(sizeof *device);
450 ec = master->base.compositor;
452 container_of(ec->output_list.next, struct weston_output, link);
454 device->master = master;
455 device->is_touchpad = 0;
457 device->devnode = strdup(path);
458 device->mt.slot = -1;
462 getresuid(&uid, &euid, &saved_uid);
464 device->fd = open(path, O_RDONLY);
469 if (evdev_configure_device(device) == -1)
472 loop = wl_display_get_event_loop(display);
473 device->source = wl_event_loop_add_fd(loop, device->fd,
475 evdev_input_device_data, device);
476 if (device->source == NULL)
479 wl_list_insert(master->devices_list.prev, &device->link);
486 free(device->devnode);
491 static const char default_seat[] = "seat0";
494 device_added(struct udev_device *udev_device, struct evdev_input *master)
496 struct weston_compositor *c;
498 const char *device_seat;
500 device_seat = udev_device_get_property_value(udev_device, "ID_SEAT");
502 device_seat = default_seat;
504 if (strcmp(device_seat, master->seat_id))
507 c = master->base.compositor;
508 devnode = udev_device_get_devnode(udev_device);
509 evdev_input_device_create(master, c->wl_display, devnode);
513 device_removed(struct udev_device *udev_device, struct evdev_input *master)
515 const char *devnode = udev_device_get_devnode(udev_device);
516 struct evdev_input_device *device, *next;
518 wl_list_for_each_safe(device, next, &master->devices_list, link) {
519 if (!strcmp(device->devnode, devnode)) {
520 wl_event_source_remove(device->source);
521 wl_list_remove(&device->link);
523 free(device->devnode);
531 evdev_add_devices(struct udev *udev, struct weston_input_device *input_base)
533 struct evdev_input *input = (struct evdev_input *) input_base;
534 struct udev_enumerate *e;
535 struct udev_list_entry *entry;
536 struct udev_device *device;
539 e = udev_enumerate_new(udev);
540 udev_enumerate_add_match_subsystem(e, "input");
541 udev_enumerate_scan_devices(e);
542 udev_list_entry_foreach(entry, udev_enumerate_get_list_entry(e)) {
543 path = udev_list_entry_get_name(entry);
544 device = udev_device_new_from_syspath(udev, path);
546 if (strncmp("event", udev_device_get_sysname(device), 5) != 0)
549 device_added(device, input);
551 udev_device_unref(device);
553 udev_enumerate_unref(e);
555 if (wl_list_empty(&input->devices_list)) {
557 "warning: no input devices on entering Weston. "
559 "\t- no permissions to read /dev/input/event*\n"
560 "\t- seats misconfigured "
561 "(Weston backend option 'seat', "
562 "udev device property ID_SEAT)\n");
567 evdev_udev_handler(int fd, uint32_t mask, void *data)
569 struct evdev_input *master = data;
570 struct udev_device *udev_device;
573 udev_device = udev_monitor_receive_device(master->udev_monitor);
577 action = udev_device_get_action(udev_device);
579 if (strncmp("event", udev_device_get_sysname(udev_device), 5) != 0)
582 if (!strcmp(action, "add")) {
583 device_added(udev_device, master);
585 else if (!strcmp(action, "remove"))
586 device_removed(udev_device, master);
588 udev_device_unref(udev_device);
594 evdev_config_udev_monitor(struct udev *udev, struct evdev_input *master)
596 struct wl_event_loop *loop;
597 struct weston_compositor *c = master->base.compositor;
599 master->udev_monitor = udev_monitor_new_from_netlink(udev, "udev");
600 if (!master->udev_monitor) {
601 fprintf(stderr, "udev: failed to create the udev monitor\n");
605 udev_monitor_filter_add_match_subsystem_devtype(master->udev_monitor,
608 if (udev_monitor_enable_receiving(master->udev_monitor)) {
609 fprintf(stderr, "udev: failed to bind the udev monitor\n");
613 loop = wl_display_get_event_loop(c->wl_display);
614 wl_event_loop_add_fd(loop, udev_monitor_get_fd(master->udev_monitor),
615 WL_EVENT_READABLE, evdev_udev_handler, master);
621 evdev_input_create(struct weston_compositor *c, struct udev *udev,
624 struct evdev_input *input;
626 input = malloc(sizeof *input);
630 memset(input, 0, sizeof *input);
631 weston_input_device_init(&input->base, c);
633 wl_list_init(&input->devices_list);
634 input->seat_id = strdup(seat);
635 if (!evdev_config_udev_monitor(udev, input)) {
636 free(input->seat_id);
641 evdev_add_devices(udev, &input->base);
643 c->input_device = &input->base.input_device;
647 evdev_remove_devices(struct weston_input_device *input_base)
649 struct evdev_input *input = (struct evdev_input *) input_base;
650 struct evdev_input_device *device, *next;
652 wl_list_for_each_safe(device, next, &input->devices_list, link) {
653 wl_event_source_remove(device->source);
654 wl_list_remove(&device->link);
656 free(device->devnode);
662 evdev_input_destroy(struct weston_input_device *input_base)
664 struct evdev_input *input = (struct evdev_input *) input_base;
666 evdev_remove_devices(input_base);
667 wl_list_remove(&input->base.link);
668 free(input->seat_id);