You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
weston/src/udev-seat.c

418 lines
11 KiB

/*
* Copyright © 2013 Intel Corporation
*
* Permission to use, copy, modify, distribute, and sell this software and
* its documentation for any purpose is hereby granted without fee, provided
* that the above copyright notice appear in all copies and that both that
* copyright notice and this permission notice appear in supporting
* documentation, and that the name of the copyright holders not be used in
* advertising or publicity pertaining to distribution of the software
* without specific, written prior permission. The copyright holders make
* no representations about the suitability of this software for any
* purpose. It is provided "as is" without express or implied warranty.
*
* THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS
* SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS, IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY
* SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
* RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF
* CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include "config.h"
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <fcntl.h>
#include "compositor.h"
#include "launcher-util.h"
#include "evdev.h"
#include "udev-seat.h"
static const char default_seat[] = "seat0";
static const char default_seat_name[] = "default";
static void
udev_seat_destroy(struct udev_seat *seat);
static int
device_added(struct udev_device *udev_device, struct udev_input *input)
{
struct weston_compositor *c;
struct evdev_device *device;
struct weston_output *output;
const char *devnode;
const char *device_seat, *seat_name, *output_name;
const char *calibration_values;
int fd;
struct udev_seat *seat;
device_seat = udev_device_get_property_value(udev_device, "ID_SEAT");
if (!device_seat)
device_seat = default_seat;
if (strcmp(device_seat, input->seat_id))
return 0;
c = input->compositor;
devnode = udev_device_get_devnode(udev_device);
/* Search for matching logical seat */
seat_name = udev_device_get_property_value(udev_device, "WL_SEAT");
if (!seat_name)
seat_name = default_seat_name;
seat = udev_seat_get_named(input, seat_name);
if (seat == NULL)
return -1;
/* Use non-blocking mode so that we can loop on read on
* evdev_device_data() until all events on the fd are
* read. mtdev_get() also expects this. */
fd = weston_launcher_open(c->launcher, devnode, O_RDWR | O_NONBLOCK);
if (fd < 0) {
weston_log("opening input device '%s' failed.\n", devnode);
return 0;
}
device = evdev_device_create(&seat->base, devnode, fd);
if (device == EVDEV_UNHANDLED_DEVICE) {
weston_launcher_close(c->launcher, fd);
weston_log("not using input device '%s'.\n", devnode);
return 0;
} else if (device == NULL) {
weston_launcher_close(c->launcher, fd);
weston_log("failed to create input device '%s'.\n", devnode);
return 0;
}
calibration_values =
udev_device_get_property_value(udev_device,
"WL_CALIBRATION");
if (calibration_values && sscanf(calibration_values,
"%f %f %f %f %f %f",
&device->abs.calibration[0],
&device->abs.calibration[1],
&device->abs.calibration[2],
&device->abs.calibration[3],
&device->abs.calibration[4],
&device->abs.calibration[5]) == 6) {
device->abs.apply_calibration = 1;
weston_log ("Applying calibration: %f %f %f %f %f %f\n",
device->abs.calibration[0],
device->abs.calibration[1],
device->abs.calibration[2],
device->abs.calibration[3],
device->abs.calibration[4],
device->abs.calibration[5]);
}
wl_list_insert(seat->devices_list.prev, &device->link);
if (seat->base.output && seat->base.pointer)
weston_pointer_clamp(seat->base.pointer,
&seat->base.pointer->x,
&seat->base.pointer->y);
output_name = udev_device_get_property_value(udev_device, "WL_OUTPUT");
if (output_name) {
device->output_name = strdup(output_name);
wl_list_for_each(output, &c->output_list, link)
if (strcmp(output->name, device->output_name) == 0)
evdev_device_set_output(device, output);
} else if (device->output == NULL && !wl_list_empty(&c->output_list)) {
output = container_of(c->output_list.next,
struct weston_output, link);
evdev_device_set_output(device, output);
}
if (input->enabled == 1)
weston_seat_repick(&seat->base);
return 0;
}
static int
udev_input_add_devices(struct udev_input *input, struct udev *udev)
{
struct udev_enumerate *e;
struct udev_list_entry *entry;
struct udev_device *device;
const char *path, *sysname;
struct udev_seat *seat;
int devices_found = 0;
e = udev_enumerate_new(udev);
udev_enumerate_add_match_subsystem(e, "input");
udev_enumerate_scan_devices(e);
udev_list_entry_foreach(entry, udev_enumerate_get_list_entry(e)) {
path = udev_list_entry_get_name(entry);
device = udev_device_new_from_syspath(udev, path);
sysname = udev_device_get_sysname(device);
if (strncmp("event", sysname, 5) != 0) {
udev_device_unref(device);
continue;
}
if (device_added(device, input) < 0) {
udev_device_unref(device);
udev_enumerate_unref(e);
return -1;
}
udev_device_unref(device);
}
udev_enumerate_unref(e);
wl_list_for_each(seat, &input->compositor->seat_list, base.link) {
evdev_notify_keyboard_focus(&seat->base, &seat->devices_list);
if (!wl_list_empty(&seat->devices_list))
devices_found = 1;
}
if (devices_found == 0) {
weston_log(
"warning: no input devices on entering Weston. "
"Possible causes:\n"
"\t- no permissions to read /dev/input/event*\n"
"\t- seats misconfigured "
"(Weston backend option 'seat', "
"udev device property ID_SEAT)\n");
return -1;
}
return 0;
}
static int
evdev_udev_handler(int fd, uint32_t mask, void *data)
{
struct udev_input *input = data;
struct udev_device *udev_device;
struct evdev_device *device, *next;
const char *action;
const char *devnode;
struct udev_seat *seat;
udev_device = udev_monitor_receive_device(input->udev_monitor);
if (!udev_device)
return 1;
action = udev_device_get_action(udev_device);
if (!action)
goto out;
if (strncmp("event", udev_device_get_sysname(udev_device), 5) != 0)
goto out;
if (!strcmp(action, "add")) {
device_added(udev_device, input);
}
else if (!strcmp(action, "remove")) {
devnode = udev_device_get_devnode(udev_device);
wl_list_for_each(seat, &input->compositor->seat_list, base.link) {
wl_list_for_each_safe(device, next, &seat->devices_list, link)
if (!strcmp(device->devnode, devnode)) {
weston_log("input device %s, %s removed\n",
device->devname, device->devnode);
weston_launcher_close(input->compositor->launcher,
device->fd);
evdev_device_destroy(device);
break;
}
}
}
out:
udev_device_unref(udev_device);
return 0;
}
int
udev_input_enable(struct udev_input *input)
{
struct wl_event_loop *loop;
struct weston_compositor *c = input->compositor;
int fd;
input->udev_monitor = udev_monitor_new_from_netlink(input->udev, "udev");
if (!input->udev_monitor) {
weston_log("udev: failed to create the udev monitor\n");
return -1;
}
udev_monitor_filter_add_match_subsystem_devtype(input->udev_monitor,
"input", NULL);
if (udev_monitor_enable_receiving(input->udev_monitor)) {
weston_log("udev: failed to bind the udev monitor\n");
udev_monitor_unref(input->udev_monitor);
return -1;
}
loop = wl_display_get_event_loop(c->wl_display);
fd = udev_monitor_get_fd(input->udev_monitor);
input->udev_monitor_source =
wl_event_loop_add_fd(loop, fd, WL_EVENT_READABLE,
evdev_udev_handler, input);
if (!input->udev_monitor_source) {
udev_monitor_unref(input->udev_monitor);
return -1;
}
if (udev_input_add_devices(input, input->udev) < 0)
return -1;
input->enabled = 1;
return 0;
}
static void
udev_input_remove_devices(struct udev_input *input)
{
struct evdev_device *device, *next;
struct udev_seat *seat;
wl_list_for_each(seat, &input->compositor->seat_list, base.link) {
wl_list_for_each_safe(device, next, &seat->devices_list, link) {
weston_launcher_close(input->compositor->launcher,
device->fd);
evdev_device_destroy(device);
}
if (seat->base.keyboard)
notify_keyboard_focus_out(&seat->base);
}
}
void
udev_input_disable(struct udev_input *input)
{
if (!input->udev_monitor)
return;
udev_monitor_unref(input->udev_monitor);
input->udev_monitor = NULL;
wl_event_source_remove(input->udev_monitor_source);
input->udev_monitor_source = NULL;
udev_input_remove_devices(input);
}
int
udev_input_init(struct udev_input *input, struct weston_compositor *c, struct udev *udev,
const char *seat_id)
{
memset(input, 0, sizeof *input);
input->seat_id = strdup(seat_id);
input->compositor = c;
input->udev = udev;
input->udev = udev_ref(udev);
if (udev_input_enable(input) < 0)
goto err;
return 0;
err:
free(input->seat_id);
return -1;
}
void
udev_input_destroy(struct udev_input *input)
{
struct udev_seat *seat, *next;
udev_input_disable(input);
wl_list_for_each_safe(seat, next, &input->compositor->seat_list, base.link)
udev_seat_destroy(seat);
udev_unref(input->udev);
free(input->seat_id);
}
static void
drm_led_update(struct weston_seat *seat_base, enum weston_led leds)
{
struct udev_seat *seat = (struct udev_seat *) seat_base;
struct evdev_device *device;
wl_list_for_each(device, &seat->devices_list, link)
evdev_led_update(device, leds);
}
static void
notify_output_create(struct wl_listener *listener, void *data)
{
struct udev_seat *seat = container_of(listener, struct udev_seat,
output_create_listener);
struct evdev_device *device;
struct weston_output *output = data;
wl_list_for_each(device, &seat->devices_list, link) {
if (device->output_name &&
strcmp(output->name, device->output_name) == 0) {
evdev_device_set_output(device, output);
}
if (device->output_name == NULL && device->output == NULL)
evdev_device_set_output(device, output);
}
}
static struct udev_seat *
udev_seat_create(struct udev_input *input, const char *seat_name)
{
struct weston_compositor *c = input->compositor;
struct udev_seat *seat;
seat = zalloc(sizeof *seat);
if (!seat)
return NULL;
weston_seat_init(&seat->base, c, seat_name);
seat->base.led_update = drm_led_update;
seat->output_create_listener.notify = notify_output_create;
wl_signal_add(&c->output_created_signal,
&seat->output_create_listener);
wl_list_init(&seat->devices_list);
return seat;
}
static void
udev_seat_destroy(struct udev_seat *seat)
{
weston_seat_release(&seat->base);
wl_list_remove(&seat->output_create_listener.link);
free(seat);
}
struct udev_seat *
udev_seat_get_named(struct udev_input *input, const char *seat_name)
{
struct weston_compositor *c = input->compositor;
struct udev_seat *seat;
wl_list_for_each(seat, &c->seat_list, base.link) {
if (strcmp(seat->base.seat_name, seat_name) == 0)
return seat;
}
seat = udev_seat_create(input, seat_name);
if (!seat)
return NULL;
return seat;
}