evdev: Add support for device quirks and implement axes swapping
[profile/ivi/weston.git] / src / evdev.c
index 4dbf575..157264b 100644 (file)
@@ -20,7 +20,6 @@
  * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */
 
-#include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <linux/input.h>
 
 #include "compositor.h"
 #include "evdev.h"
-#include "launcher-util.h"
-
-struct evdev_input {
-       struct weston_input_device base;
-       struct wl_list devices_list;
-       struct udev_monitor *udev_monitor;
-       struct wl_event_source *udev_monitor_source;
-       char *seat_id;
-};
 
-#define MAX_SLOTS 16
-
-struct evdev_input_device {
-       struct evdev_input *master;
-       struct wl_list link;
-       struct wl_event_source *source;
-       struct weston_output *output;
-       char *devnode;
-       int fd;
-       struct {
-               int min_x, max_x, min_y, max_y;
-               int old_x, old_y, reset_x, reset_y;
-               int32_t x, y;
-       } abs;
-
-       struct {
-               int slot;
-               int32_t x[MAX_SLOTS];
-               int32_t y[MAX_SLOTS];
-       } mt;
-       struct mtdev *mtdev;
-
-       struct {
-               int dx, dy;
-       } rel;
-
-       int type; /* event type flags */
-
-       int is_touchpad, is_mt;
-};
+#define DEFAULT_AXIS_STEP_DISTANCE wl_fixed_from_int(10)
+
+void
+evdev_led_update(struct evdev_device *device, enum weston_led leds)
+{
+       static const struct {
+               enum weston_led weston;
+               int evdev;
+       } map[] = {
+               { LED_NUM_LOCK, LED_NUML },
+               { LED_CAPS_LOCK, LED_CAPSL },
+               { LED_SCROLL_LOCK, LED_SCROLLL },
+       };
+       struct input_event ev[ARRAY_LENGTH(map)];
+       unsigned int i;
+
+       if (!device->caps & EVDEV_KEYBOARD)
+               return;
 
-/* event type flags */
-#define EVDEV_ABSOLUTE_MOTION          (1 << 0)
-#define EVDEV_ABSOLUTE_MT_DOWN         (1 << 1)
-#define EVDEV_ABSOLUTE_MT_MOTION       (1 << 2)
-#define EVDEV_ABSOLUTE_MT_UP           (1 << 3)
-#define EVDEV_RELATIVE_MOTION          (1 << 4)
+       memset(ev, 0, sizeof(ev));
+       for (i = 0; i < ARRAY_LENGTH(map); i++) {
+               ev[i].type = EV_LED;
+               ev[i].code = map[i].evdev;
+               ev[i].value = !!(leds & map[i].weston);
+       }
+
+       i = write(device->fd, ev, sizeof ev);
+       (void)i; /* no, we really don't care about the return value */
+}
 
 static inline void
-evdev_process_key(struct evdev_input_device *device,
-                        struct input_event *e, int time)
+evdev_process_key(struct evdev_device *device, struct input_event *e, int time)
 {
        if (e->value == 2)
                return;
 
        switch (e->code) {
-       case BTN_TOOL_PEN:
-       case BTN_TOOL_RUBBER:
-       case BTN_TOOL_BRUSH:
-       case BTN_TOOL_PENCIL:
-       case BTN_TOOL_AIRBRUSH:
-       case BTN_TOOL_FINGER:
-       case BTN_TOOL_MOUSE:
-       case BTN_TOOL_LENS:
-               if (device->is_touchpad)
-               {
-                       device->abs.reset_x = 1;
-                       device->abs.reset_y = 1;
-               }
-               break;
-       case BTN_TOUCH:
-               /* Multitouch touchscreen devices might not send individually
-                * button events each time a new finger is down. So we don't
-                * send notification for such devices and we solve the button
-                * case emulating on compositor side. */
-               if (device->is_mt)
-                       break;
-
-               /* Treat BTN_TOUCH from devices that only have BTN_TOUCH as
-                * BTN_LEFT */
-               e->code = BTN_LEFT;
-               /* Intentional fallthrough! */
        case BTN_LEFT:
        case BTN_RIGHT:
        case BTN_MIDDLE:
@@ -120,20 +75,24 @@ evdev_process_key(struct evdev_input_device *device,
        case BTN_FORWARD:
        case BTN_BACK:
        case BTN_TASK:
-               notify_button(&device->master->base.input_device,
-                             time, e->code, e->value);
+               notify_button(device->seat,
+                             time, e->code,
+                             e->value ? WL_POINTER_BUTTON_STATE_PRESSED :
+                                        WL_POINTER_BUTTON_STATE_RELEASED);
                break;
 
        default:
-               notify_key(&device->master->base.input_device,
-                          time, e->code, e->value);
+               notify_key(device->seat,
+                          time, e->code,
+                          e->value ? WL_KEYBOARD_KEY_STATE_PRESSED :
+                                     WL_KEYBOARD_KEY_STATE_RELEASED,
+                          STATE_UPDATE_AUTOMATIC);
                break;
        }
 }
 
 static void
-evdev_process_touch(struct evdev_input_device *device,
-                   struct input_event *e)
+evdev_process_touch(struct evdev_device *device, struct input_event *e)
 {
        const int screen_width = device->output->current->width;
        const int screen_height = device->output->current->height;
@@ -144,123 +103,122 @@ evdev_process_touch(struct evdev_input_device *device,
                break;
        case ABS_MT_TRACKING_ID:
                if (e->value >= 0)
-                       device->type |= EVDEV_ABSOLUTE_MT_DOWN;
+                       device->pending_events |= EVDEV_ABSOLUTE_MT_DOWN;
                else
-                       device->type |= EVDEV_ABSOLUTE_MT_UP;
+                       device->pending_events |= EVDEV_ABSOLUTE_MT_UP;
                break;
        case ABS_MT_POSITION_X:
                device->mt.x[device->mt.slot] =
                        (e->value - device->abs.min_x) * screen_width /
                        (device->abs.max_x - device->abs.min_x) +
                        device->output->x;
-               device->type |= EVDEV_ABSOLUTE_MT_MOTION;
+               device->pending_events |= EVDEV_ABSOLUTE_MT_MOTION;
                break;
        case ABS_MT_POSITION_Y:
                device->mt.y[device->mt.slot] =
                        (e->value - device->abs.min_y) * screen_height /
                        (device->abs.max_y - device->abs.min_y) +
                        device->output->y;
-               device->type |= EVDEV_ABSOLUTE_MT_MOTION;
+               device->pending_events |= EVDEV_ABSOLUTE_MT_MOTION;
                break;
        }
 }
 
 static inline void
-evdev_process_absolute_motion(struct evdev_input_device *device,
+evdev_process_absolute_motion(struct evdev_device *device,
                              struct input_event *e)
 {
        const int screen_width = device->output->current->width;
        const int screen_height = device->output->current->height;
 
-       switch (e->code) {
-       case ABS_X:
-               device->abs.x =
-                       (e->value - device->abs.min_x) * screen_width /
-                       (device->abs.max_x - device->abs.min_x) +
-                       device->output->x;
-               device->type |= EVDEV_ABSOLUTE_MOTION;
-               break;
-       case ABS_Y:
-               device->abs.y =
-                       (e->value - device->abs.min_y) * screen_height /
-                       (device->abs.max_y - device->abs.min_y) +
-                       device->output->y;
-               device->type |= EVDEV_ABSOLUTE_MOTION;
-               break;
-       }
-}
-
-static inline void
-evdev_process_absolute_motion_touchpad(struct evdev_input_device *device,
-                                      struct input_event *e)
-{
-       /* FIXME: Make this configurable somehow. */
-       const int touchpad_speed = 700;
-
-       switch (e->code) {
-       case ABS_X:
-               e->value -= device->abs.min_x;
-               if (device->abs.reset_x)
-                       device->abs.reset_x = 0;
-               else {
-                       device->rel.dx =
-                               (e->value - device->abs.old_x) *
-                               touchpad_speed /
-                               (device->abs.max_x - device->abs.min_x);
+       if (device->quirks & EVDEV_QUIRK_SWAP_AXES) {
+               switch (e->code) {
+               case ABS_X:
+                       device->abs.y =
+                               (e->value - device->abs.min_y) * screen_height /
+                               (device->abs.max_y - device->abs.min_y) +
+                               device->output->y;
+                       device->pending_events |= EVDEV_ABSOLUTE_MOTION;
+                       break;
+               case ABS_Y:
+                       device->abs.x =
+                               (e->value - device->abs.min_x) * screen_width /
+                               (device->abs.max_x - device->abs.min_x) +
+                               device->output->x;
+                       device->pending_events |= EVDEV_ABSOLUTE_MOTION;
+                       break;
                }
-               device->abs.old_x = e->value;
-               device->type |= EVDEV_RELATIVE_MOTION;
-               break;
-       case ABS_Y:
-               e->value -= device->abs.min_y;
-               if (device->abs.reset_y)
-                       device->abs.reset_y = 0;
-               else {
-                       device->rel.dy =
-                               (e->value - device->abs.old_y) *
-                               touchpad_speed /
-                               /* maybe use x size here to have the same scale? */
-                               (device->abs.max_y - device->abs.min_y);
+
+       } else {
+               switch (e->code) {
+               case ABS_X:
+                       device->abs.x =
+                               (e->value - device->abs.min_x) * screen_width /
+                               (device->abs.max_x - device->abs.min_x) +
+                               device->output->x;
+                       device->pending_events |= EVDEV_ABSOLUTE_MOTION;
+                       break;
+               case ABS_Y:
+                       device->abs.y =
+                               (e->value - device->abs.min_y) * screen_height /
+                               (device->abs.max_y - device->abs.min_y) +
+                               device->output->y;
+                       device->pending_events |= EVDEV_ABSOLUTE_MOTION;
+                       break;
                }
-               device->abs.old_y = e->value;
-               device->type |= EVDEV_RELATIVE_MOTION;
-               break;
        }
 }
 
 static inline void
-evdev_process_relative(struct evdev_input_device *device,
-                             struct input_event *e, uint32_t time)
+evdev_process_relative(struct evdev_device *device,
+                      struct input_event *e, uint32_t time)
 {
        switch (e->code) {
        case REL_X:
-               device->rel.dx += e->value;
-               device->type |= EVDEV_RELATIVE_MOTION;
+               device->rel.dx += wl_fixed_from_int(e->value);
+               device->pending_events |= EVDEV_RELATIVE_MOTION;
                break;
        case REL_Y:
-               device->rel.dy += e->value;
-               device->type |= EVDEV_RELATIVE_MOTION;
+               device->rel.dy += wl_fixed_from_int(e->value);
+               device->pending_events |= EVDEV_RELATIVE_MOTION;
                break;
        case REL_WHEEL:
-               notify_axis(&device->master->base.input_device,
-                             time,
-                             WL_INPUT_DEVICE_AXIS_VERTICAL_SCROLL, e->value);
+               switch (e->value) {
+               case -1:
+                       /* Scroll down */
+               case 1:
+                       /* Scroll up */
+                       notify_axis(device->seat,
+                                   time,
+                                   WL_POINTER_AXIS_VERTICAL_SCROLL,
+                                   -1 * e->value * DEFAULT_AXIS_STEP_DISTANCE);
+                       break;
+               default:
+                       break;
+               }
                break;
        case REL_HWHEEL:
-               notify_axis(&device->master->base.input_device,
-                             time,
-                             WL_INPUT_DEVICE_AXIS_HORIZONTAL_SCROLL, e->value);
-               break;
+               switch (e->value) {
+               case -1:
+                       /* Scroll left */
+               case 1:
+                       /* Scroll right */
+                       notify_axis(device->seat,
+                                   time,
+                                   WL_POINTER_AXIS_HORIZONTAL_SCROLL,
+                                   e->value * DEFAULT_AXIS_STEP_DISTANCE);
+                       break;
+               default:
+                       break;
+
+               }
        }
 }
 
 static inline void
-evdev_process_absolute(struct evdev_input_device *device,
-                      struct input_event *e)
+evdev_process_absolute(struct evdev_device *device, struct input_event *e)
 {
-       if (device->is_touchpad) {
-               evdev_process_absolute_motion_touchpad(device, e);
-       } else if (device->is_mt) {
+       if (device->is_mt) {
                evdev_process_touch(device, e);
        } else {
                evdev_process_absolute_motion(device, e);
@@ -277,6 +235,7 @@ is_motion_event(struct input_event *e)
                case REL_Y:
                        return 1;
                }
+               break;
        case EV_ABS:
                switch (e->code) {
                case ABS_X:
@@ -291,60 +250,107 @@ is_motion_event(struct input_event *e)
 }
 
 static void
-evdev_flush_motion(struct evdev_input_device *device, uint32_t time)
+evdev_flush_motion(struct evdev_device *device, uint32_t time)
 {
-       struct wl_input_device *master = &device->master->base.input_device;
+       struct weston_seat *master = device->seat;
 
-       if (!device->type)
+       if (!(device->pending_events & EVDEV_SYN))
                return;
 
-       if (device->type & EVDEV_RELATIVE_MOTION) {
+       device->pending_events &= ~EVDEV_SYN;
+       if (device->pending_events & EVDEV_RELATIVE_MOTION) {
                notify_motion(master, time,
-                             master->x + wl_fixed_from_int(device->rel.dx),
-                             master->y + wl_fixed_from_int(device->rel.dy));
-               device->type &= ~EVDEV_RELATIVE_MOTION;
+                             master->seat.pointer->x + device->rel.dx,
+                             master->seat.pointer->y + device->rel.dy);
+               device->pending_events &= ~EVDEV_RELATIVE_MOTION;
                device->rel.dx = 0;
                device->rel.dy = 0;
        }
-       if (device->type & EVDEV_ABSOLUTE_MT_DOWN) {
+       if (device->pending_events & EVDEV_ABSOLUTE_MT_DOWN) {
                notify_touch(master, time,
                             device->mt.slot,
                             wl_fixed_from_int(device->mt.x[device->mt.slot]),
                             wl_fixed_from_int(device->mt.y[device->mt.slot]),
-                            WL_INPUT_DEVICE_TOUCH_DOWN);
-               device->type &= ~EVDEV_ABSOLUTE_MT_DOWN;
-               device->type &= ~EVDEV_ABSOLUTE_MT_MOTION;
+                            WL_TOUCH_DOWN);
+               device->pending_events &= ~EVDEV_ABSOLUTE_MT_DOWN;
+               device->pending_events &= ~EVDEV_ABSOLUTE_MT_MOTION;
        }
-       if (device->type & EVDEV_ABSOLUTE_MT_MOTION) {
+       if (device->pending_events & EVDEV_ABSOLUTE_MT_MOTION) {
                notify_touch(master, time,
                             device->mt.slot,
                             wl_fixed_from_int(device->mt.x[device->mt.slot]),
                             wl_fixed_from_int(device->mt.y[device->mt.slot]),
-                            WL_INPUT_DEVICE_TOUCH_MOTION);
-               device->type &= ~EVDEV_ABSOLUTE_MT_DOWN;
-               device->type &= ~EVDEV_ABSOLUTE_MT_MOTION;
+                            WL_TOUCH_MOTION);
+               device->pending_events &= ~EVDEV_ABSOLUTE_MT_DOWN;
+               device->pending_events &= ~EVDEV_ABSOLUTE_MT_MOTION;
        }
-       if (device->type & EVDEV_ABSOLUTE_MT_UP) {
+       if (device->pending_events & EVDEV_ABSOLUTE_MT_UP) {
                notify_touch(master, time, device->mt.slot, 0, 0,
-                            WL_INPUT_DEVICE_TOUCH_UP);
-               device->type &= ~EVDEV_ABSOLUTE_MT_UP;
+                            WL_TOUCH_UP);
+               device->pending_events &= ~EVDEV_ABSOLUTE_MT_UP;
        }
-       if (device->type & EVDEV_ABSOLUTE_MOTION) {
+       if (device->pending_events & EVDEV_ABSOLUTE_MOTION) {
                notify_motion(master, time,
                              wl_fixed_from_int(device->abs.x),
                              wl_fixed_from_int(device->abs.y));
-               device->type &= ~EVDEV_ABSOLUTE_MOTION;
+               device->pending_events &= ~EVDEV_ABSOLUTE_MOTION;
        }
 }
 
 static void
-evdev_process_events(struct evdev_input_device *device,
+fallback_process(struct evdev_dispatch *dispatch,
+                struct evdev_device *device,
+                struct input_event *event,
+                uint32_t time)
+{
+       switch (event->type) {
+       case EV_REL:
+               evdev_process_relative(device, event, time);
+               break;
+       case EV_ABS:
+               evdev_process_absolute(device, event);
+               break;
+       case EV_KEY:
+               evdev_process_key(device, event, time);
+               break;
+       case EV_SYN:
+               device->pending_events |= EVDEV_SYN;
+               break;
+       }
+}
+
+static void
+fallback_destroy(struct evdev_dispatch *dispatch)
+{
+       free(dispatch);
+}
+
+struct evdev_dispatch_interface fallback_interface = {
+       fallback_process,
+       fallback_destroy
+};
+
+static struct evdev_dispatch *
+fallback_dispatch_create(void)
+{
+       struct evdev_dispatch *dispatch = malloc(sizeof *dispatch);
+       if (dispatch == NULL)
+               return NULL;
+
+       dispatch->interface = &fallback_interface;
+
+       return dispatch;
+}
+
+static void
+evdev_process_events(struct evdev_device *device,
                     struct input_event *ev, int count)
 {
+       struct evdev_dispatch *dispatch = device->dispatch;
        struct input_event *e, *end;
        uint32_t time = 0;
 
-       device->type = 0;
+       device->pending_events = 0;
 
        e = ev;
        end = e + count;
@@ -356,31 +362,22 @@ evdev_process_events(struct evdev_input_device *device,
                 * events and send as a bunch */
                if (!is_motion_event(e))
                        evdev_flush_motion(device, time);
-               switch (e->type) {
-               case EV_REL:
-                       evdev_process_relative(device, e, time);
-                       break;
-               case EV_ABS:
-                       evdev_process_absolute(device, e);
-                       break;
-               case EV_KEY:
-                       evdev_process_key(device, e, time);
-                       break;
-               }
+
+               dispatch->interface->process(dispatch, device, e, time);
        }
 
        evdev_flush_motion(device, time);
 }
 
 static int
-evdev_input_device_data(int fd, uint32_t mask, void *data)
+evdev_device_data(int fd, uint32_t mask, void *data)
 {
        struct weston_compositor *ec;
-       struct evdev_input_device *device = data;
+       struct evdev_device *device = data;
        struct input_event ev[32];
        int len;
 
-       ec = device->master->base.compositor;
+       ec = device->seat->compositor;
        if (!ec->focus)
                return 1;
 
@@ -396,7 +393,7 @@ evdev_input_device_data(int fd, uint32_t mask, void *data)
                        len = read(fd, &ev, sizeof ev);
 
                if (len < 0 || len % sizeof ev[0] != 0) {
-                       /* FIXME: call device_removed when errno is ENODEV. */
+                       /* FIXME: call evdev_device_destroy when errno is ENODEV. */
                        return 1;
                }
 
@@ -407,27 +404,20 @@ evdev_input_device_data(int fd, uint32_t mask, void *data)
        return 1;
 }
 
-/* copied from udev/extras/input_id/input_id.c */
-/* we must use this kernel-compatible implementation */
-#define BITS_PER_LONG (sizeof(unsigned long) * 8)
-#define NBITS(x) ((((x)-1)/BITS_PER_LONG)+1)
-#define OFF(x)  ((x)%BITS_PER_LONG)
-#define BIT(x)  (1UL<<OFF(x))
-#define LONG(x) ((x)/BITS_PER_LONG)
-#define TEST_BIT(array, bit)    ((array[LONG(bit)] >> OFF(bit)) & 1)
-/* end copied */
-
 static int
-evdev_configure_device(struct evdev_input_device *device)
+evdev_handle_device(struct evdev_device *device)
 {
        struct input_absinfo absinfo;
        unsigned long ev_bits[NBITS(EV_MAX)];
        unsigned long abs_bits[NBITS(ABS_MAX)];
+       unsigned long rel_bits[NBITS(REL_MAX)];
        unsigned long key_bits[NBITS(KEY_MAX)];
        int has_key, has_abs;
+       unsigned int i;
 
        has_key = 0;
        has_abs = 0;
+       device->caps = 0;
 
        ioctl(device->fd, EVIOCGBIT(0, sizeof(ev_bits)), ev_bits);
        if (TEST_BIT(ev_bits, EV_ABS)) {
@@ -439,143 +429,218 @@ evdev_configure_device(struct evdev_input_device *device)
                        ioctl(device->fd, EVIOCGABS(ABS_X), &absinfo);
                        device->abs.min_x = absinfo.minimum;
                        device->abs.max_x = absinfo.maximum;
+                       device->caps |= EVDEV_MOTION_ABS;
                }
                if (TEST_BIT(abs_bits, ABS_Y)) {
                        ioctl(device->fd, EVIOCGABS(ABS_Y), &absinfo);
                        device->abs.min_y = absinfo.minimum;
                        device->abs.max_y = absinfo.maximum;
+                       device->caps |= EVDEV_MOTION_ABS;
                }
                if (TEST_BIT(abs_bits, ABS_MT_SLOT)) {
+                       ioctl(device->fd, EVIOCGABS(ABS_MT_POSITION_X),
+                             &absinfo);
+                       if (device->quirks & EVDEV_QUIRK_SWAP_AXES) {
+                               device->abs.min_y = absinfo.minimum;
+                               device->abs.max_y = absinfo.maximum;
+                       } else {
+                               device->abs.min_x = absinfo.minimum;
+                               device->abs.max_x = absinfo.maximum;
+                       }
+                       ioctl(device->fd, EVIOCGABS(ABS_MT_POSITION_Y),
+                             &absinfo);
+                       if (device->quirks & EVDEV_QUIRK_SWAP_AXES) {
+                               device->abs.min_x = absinfo.minimum;
+                               device->abs.max_x = absinfo.maximum;
+                       } else {
+                               device->abs.min_y = absinfo.minimum;
+                               device->abs.max_y = absinfo.maximum;
+                       }
                        device->is_mt = 1;
                        device->mt.slot = 0;
+                       device->caps |= EVDEV_TOUCH;
                }
        }
+       if (TEST_BIT(ev_bits, EV_REL)) {
+               ioctl(device->fd, EVIOCGBIT(EV_REL, sizeof(rel_bits)),
+                     rel_bits);
+               if (TEST_BIT(rel_bits, REL_X) || TEST_BIT(rel_bits, REL_Y))
+                       device->caps |= EVDEV_MOTION_REL;
+       }
        if (TEST_BIT(ev_bits, EV_KEY)) {
                has_key = 1;
                ioctl(device->fd, EVIOCGBIT(EV_KEY, sizeof(key_bits)),
                      key_bits);
                if (TEST_BIT(key_bits, BTN_TOOL_FINGER) &&
-                            !TEST_BIT(key_bits, BTN_TOOL_PEN))
-                       device->is_touchpad = 1;
+                   !TEST_BIT(key_bits, BTN_TOOL_PEN) &&
+                   has_abs)
+                       device->dispatch = evdev_touchpad_create(device);
+               for (i = KEY_ESC; i < KEY_MAX; i++) {
+                       if (i >= BTN_MISC && i < KEY_OK)
+                               continue;
+                       if (TEST_BIT(key_bits, i)) {
+                               device->caps |= EVDEV_KEYBOARD;
+                               break;
+                       }
+               }
+               for (i = BTN_MISC; i < KEY_OK; i++) {
+                       if (TEST_BIT(key_bits, i)) {
+                               device->caps |= EVDEV_BUTTON;
+                               break;
+                       }
+               }
+       }
+       if (TEST_BIT(ev_bits, EV_LED)) {
+               device->caps |= EVDEV_KEYBOARD;
        }
 
        /* This rule tries to catch accelerometer devices and opt out. We may
         * want to adjust the protocol later adding a proper event for dealing
         * with accelerometers and implement here accordingly */
-       if (has_abs && !has_key)
-               return -1;
+       if (has_abs && !has_key && !device->is_mt) {
+               weston_log("input device %s, %s "
+                          "ignored: unsupported device type\n",
+                          device->devname, device->devnode);
+               return 0;
+       }
+
+       return 1;
+}
+
+static int
+evdev_configure_device(struct evdev_device *device)
+{
+       if ((device->caps &
+            (EVDEV_MOTION_ABS | EVDEV_MOTION_REL | EVDEV_BUTTON))) {
+               weston_seat_init_pointer(device->seat);
+               weston_log("input device %s, %s is a pointer\n",
+                          device->devname, device->devnode);
+       }
+       if ((device->caps & EVDEV_KEYBOARD)) {
+               if (weston_seat_init_keyboard(device->seat, NULL) < 0)
+                       return -1;
+               weston_log("input device %s, %s is a keyboard\n",
+                          device->devname, device->devnode);
+       }
+       if ((device->caps & EVDEV_TOUCH)) {
+               weston_seat_init_touch(device->seat);
+               weston_log("input device %s, %s is a touch device\n",
+                          device->devname, device->devnode);
+       }
 
        return 0;
 }
 
-static struct evdev_input_device *
-evdev_input_device_create(struct evdev_input *master,
-                         struct wl_display *display, const char *path)
+struct evdev_device *
+evdev_device_create(struct weston_seat *seat, const char *path, int device_fd)
 {
-       struct evdev_input_device *device;
+       struct evdev_device *device;
        struct weston_compositor *ec;
+       char devname[256] = "unknown";
 
        device = malloc(sizeof *device);
        if (device == NULL)
                return NULL;
+       memset(device, 0, sizeof *device);
 
-       ec = master->base.compositor;
+       ec = seat->compositor;
        device->output =
                container_of(ec->output_list.next, struct weston_output, link);
 
-       device->master = master;
-       device->is_touchpad = 0;
+       device->seat = seat;
        device->is_mt = 0;
        device->mtdev = NULL;
        device->devnode = strdup(path);
        device->mt.slot = -1;
        device->rel.dx = 0;
        device->rel.dy = 0;
+       device->dispatch = NULL;
+       device->fd = device_fd;
+
+       ioctl(device->fd, EVIOCGNAME(sizeof(devname)), devname);
+       device->devname = strdup(devname);
 
-       /* Use non-blocking mode so that we can loop on read on
-        * evdev_input_device_data() until all events on the fd are
-        * read.  mtdev_get() also expects this. */
-       device->fd = weston_launcher_open(ec, path, O_RDONLY | O_NONBLOCK);
-       if (device->fd < 0)
-               goto err0;
+       if (!evdev_handle_device(device)) {
+               free(device->devnode);
+               free(device->devname);
+               free(device);
+               return EVDEV_UNHANDLED_DEVICE;
+       }
 
        if (evdev_configure_device(device) == -1)
                goto err1;
 
+       /* If the dispatch was not set up use the fallback. */
+       if (device->dispatch == NULL)
+               device->dispatch = fallback_dispatch_create();
+       if (device->dispatch == NULL)
+               goto err1;
+
+
        if (device->is_mt) {
                device->mtdev = mtdev_new_open(device->fd);
                if (!device->mtdev)
-                       fprintf(stderr, "mtdev failed to open for %s\n", path);
+                       weston_log("mtdev failed to open for %s\n", path);
        }
 
        device->source = wl_event_loop_add_fd(ec->input_loop, device->fd,
                                              WL_EVENT_READABLE,
-                                             evdev_input_device_data, device);
+                                             evdev_device_data, device);
        if (device->source == NULL)
-               goto err1;
-
-       wl_list_insert(master->devices_list.prev, &device->link);
+               goto err2;
 
        return device;
 
+err2:
+       device->dispatch->interface->destroy(device->dispatch);
 err1:
-       close(device->fd);
-err0:
+       free(device->devname);
        free(device->devnode);
        free(device);
        return NULL;
 }
 
-static const char default_seat[] = "seat0";
-
-static void
-device_added(struct udev_device *udev_device, struct evdev_input *master)
+void
+evdev_device_destroy(struct evdev_device *device)
 {
-       struct weston_compositor *c;
-       const char *devnode;
-       const char *device_seat;
+       struct evdev_dispatch *dispatch;
 
-       device_seat = udev_device_get_property_value(udev_device, "ID_SEAT");
-       if (!device_seat)
-               device_seat = default_seat;
+       dispatch = device->dispatch;
+       if (dispatch)
+               dispatch->interface->destroy(dispatch);
 
-       if (strcmp(device_seat, master->seat_id))
-               return;
-
-       c = master->base.compositor;
-       devnode = udev_device_get_devnode(udev_device);
-       evdev_input_device_create(master, c->wl_display, devnode);
-}
-
-static void
-device_removed(struct evdev_input_device *device)
-{
        wl_event_source_remove(device->source);
        wl_list_remove(&device->link);
        if (device->mtdev)
                mtdev_close_delete(device->mtdev);
        close(device->fd);
+       free(device->devname);
        free(device->devnode);
        free(device);
 }
 
-static void
-evdev_notify_keyboard_focus(struct evdev_input *input)
+void
+evdev_notify_keyboard_focus(struct weston_seat *seat,
+                           struct wl_list *evdev_devices)
 {
-       struct evdev_input_device *device;
+       struct evdev_device *device;
        struct wl_array keys;
        unsigned int i, set;
-       char evdev_keys[(KEY_CNT + 7) / 8], all_keys[(KEY_CNT + 7) / 8];
+       char evdev_keys[(KEY_CNT + 7) / 8];
+       char all_keys[(KEY_CNT + 7) / 8];
        uint32_t *k;
        int ret;
 
+       if (!seat->seat.keyboard)
+               return;
+
        memset(all_keys, 0, sizeof all_keys);
-       wl_list_for_each(device, &input->devices_list, link) {
+       wl_list_for_each(device, evdev_devices, link) {
                memset(evdev_keys, 0, sizeof evdev_keys);
                ret = ioctl(device->fd,
                            EVIOCGKEY(sizeof evdev_keys), evdev_keys);
                if (ret < 0) {
-                       fprintf(stderr, "failed to get keys for device %s\n",
+                       weston_log("failed to get keys for device %s\n",
                                device->devnode);
                        continue;
                }
@@ -592,185 +657,7 @@ evdev_notify_keyboard_focus(struct evdev_input *input)
                }
        }
 
-       notify_keyboard_focus(&input->base.input_device, &keys);
+       notify_keyboard_focus_in(seat, &keys, STATE_UPDATE_AUTOMATIC);
 
        wl_array_release(&keys);
 }
-
-void
-evdev_add_devices(struct udev *udev, struct weston_input_device *input_base)
-{
-       struct evdev_input *input = (struct evdev_input *) input_base;
-       struct udev_enumerate *e;
-       struct udev_list_entry *entry;
-       struct udev_device *device;
-       const char *path, *sysname;
-
-       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;
-               }
-
-               device_added(device, input);
-
-               udev_device_unref(device);
-       }
-       udev_enumerate_unref(e);
-
-       evdev_notify_keyboard_focus(input);
-
-       if (wl_list_empty(&input->devices_list)) {
-               fprintf(stderr,
-                       "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");
-       }
-}
-
-static int
-evdev_udev_handler(int fd, uint32_t mask, void *data)
-{
-       struct evdev_input *master = data;
-       struct udev_device *udev_device;
-       struct evdev_input_device *device, *next;
-       const char *action;
-       const char *devnode;
-
-       udev_device = udev_monitor_receive_device(master->udev_monitor);
-       if (!udev_device)
-               return 1;
-
-       action = udev_device_get_action(udev_device);
-       if (action) {
-               if (strncmp("event", udev_device_get_sysname(udev_device), 5) != 0)
-                       return 0;
-
-               if (!strcmp(action, "add")) {
-                       device_added(udev_device, master);
-               }
-               else if (!strcmp(action, "remove")) {
-                       devnode = udev_device_get_devnode(udev_device);
-                       wl_list_for_each_safe(device, next,
-                                             &master->devices_list, link)
-                               if (!strcmp(device->devnode, devnode)) {
-                                       device_removed(device);
-                                       break;
-                               }
-               }
-       }
-       udev_device_unref(udev_device);
-
-       return 0;
-}
-
-int
-evdev_enable_udev_monitor(struct udev *udev, struct weston_input_device *input_base)
-{
-       struct evdev_input *master = (struct evdev_input *) input_base;
-       struct wl_event_loop *loop;
-       struct weston_compositor *c = master->base.compositor;
-       int fd;
-
-       master->udev_monitor = udev_monitor_new_from_netlink(udev, "udev");
-       if (!master->udev_monitor) {
-               fprintf(stderr, "udev: failed to create the udev monitor\n");
-               return 0;
-       }
-
-       udev_monitor_filter_add_match_subsystem_devtype(master->udev_monitor,
-                       "input", NULL);
-
-       if (udev_monitor_enable_receiving(master->udev_monitor)) {
-               fprintf(stderr, "udev: failed to bind the udev monitor\n");
-               udev_monitor_unref(master->udev_monitor);
-               return 0;
-       }
-
-       loop = wl_display_get_event_loop(c->wl_display);
-       fd = udev_monitor_get_fd(master->udev_monitor);
-       master->udev_monitor_source =
-               wl_event_loop_add_fd(loop, fd, WL_EVENT_READABLE,
-                                    evdev_udev_handler, master);
-       if (!master->udev_monitor_source) {
-               udev_monitor_unref(master->udev_monitor);
-               return 0;
-       }
-
-       return 1;
-}
-
-void
-evdev_disable_udev_monitor(struct weston_input_device *input_base)
-{
-       struct evdev_input *input = (struct evdev_input *) input_base;
-
-       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;
-}
-
-void
-evdev_input_create(struct weston_compositor *c, struct udev *udev,
-                  const char *seat)
-{
-       struct evdev_input *input;
-
-       input = malloc(sizeof *input);
-       if (input == NULL)
-               return;
-
-       memset(input, 0, sizeof *input);
-       weston_input_device_init(&input->base, c);
-
-       wl_list_init(&input->devices_list);
-       input->seat_id = strdup(seat);
-       if (!evdev_enable_udev_monitor(udev, &input->base)) {
-               free(input->seat_id);
-               free(input);
-               return;
-       }
-
-       evdev_add_devices(udev, &input->base);
-
-       c->input_device = &input->base.input_device;
-}
-
-void
-evdev_remove_devices(struct weston_input_device *input_base)
-{
-       struct evdev_input *input = (struct evdev_input *) input_base;
-       struct evdev_input_device *device, *next;
-
-       wl_list_for_each_safe(device, next, &input->devices_list, link)
-               device_removed(device);
-
-       notify_keyboard_focus(&input->base.input_device, NULL);
-}
-
-void
-evdev_input_destroy(struct weston_input_device *input_base)
-{
-       struct evdev_input *input = (struct evdev_input *) input_base;
-
-       evdev_remove_devices(input_base);
-       evdev_disable_udev_monitor(&input->base);
-
-       wl_list_remove(&input->base.link);
-       free(input->seat_id);
-       free(input);
-}