58 struct mousedev {  struct
78 	int (*open_device)(struct mousedev *mousedev);  argument
79 	void (*close_device)(struct mousedev *mousedev);  argument
96 	struct mousedev *mousedev;  member
116 static struct mousedev *mousedev_mix;
119 #define fx(i)  (mousedev->old_x[(mousedev->pkt_count - (i)) & 03])
120 #define fy(i)  (mousedev->old_y[(mousedev->pkt_count - (i)) & 03])
123 				    struct mousedev *mousedev,  in mousedev_touchpad_event()  argument
134 		if (mousedev->touch && mousedev->pkt_count >= 2) {  in mousedev_touchpad_event()
141 			tmp += mousedev->frac_dx;  in mousedev_touchpad_event()
142 			mousedev->packet.dx = tmp / FRACTION_DENOM;  in mousedev_touchpad_event()
143 			mousedev->frac_dx =  in mousedev_touchpad_event()
144 				tmp - mousedev->packet.dx * FRACTION_DENOM;  in mousedev_touchpad_event()
150 		if (mousedev->touch && mousedev->pkt_count >= 2) {  in mousedev_touchpad_event()
158 			tmp += mousedev->frac_dy;  in mousedev_touchpad_event()
159 			mousedev->packet.dy = tmp / FRACTION_DENOM;  in mousedev_touchpad_event()
160 			mousedev->frac_dy = tmp -  in mousedev_touchpad_event()
161 				mousedev->packet.dy * FRACTION_DENOM;  in mousedev_touchpad_event()
167 static void mousedev_abs_event(struct input_dev *dev, struct mousedev *mousedev,  in mousedev_abs_event()  argument
184 		mousedev->packet.x = ((value - min) * xres) / size;  in mousedev_abs_event()
185 		mousedev->packet.abs_event = 1;  in mousedev_abs_event()
198 		mousedev->packet.y = yres - ((value - min) * yres) / size;  in mousedev_abs_event()
199 		mousedev->packet.abs_event = 1;  in mousedev_abs_event()
204 static void mousedev_rel_event(struct mousedev *mousedev,  in mousedev_rel_event()  argument
209 		mousedev->packet.dx += value;  in mousedev_rel_event()
213 		mousedev->packet.dy -= value;  in mousedev_rel_event()
217 		mousedev->packet.dz -= value;  in mousedev_rel_event()
222 static void mousedev_key_event(struct mousedev *mousedev,  in mousedev_key_event()  argument
253 		set_bit(index, &mousedev->packet.buttons);  in mousedev_key_event()
256 		clear_bit(index, &mousedev->packet.buttons);  in mousedev_key_event()
261 static void mousedev_notify_readers(struct mousedev *mousedev,  in mousedev_notify_readers()  argument
270 	list_for_each_entry_rcu(client, &mousedev->client_list, node) {  in mousedev_notify_readers()
276 		if (client->ready && p->buttons != mousedev->packet.buttons) {  in mousedev_notify_readers()
300 		p->buttons = mousedev->packet.buttons;  in mousedev_notify_readers()
316 		wake_up_interruptible(&mousedev->wait);  in mousedev_notify_readers()
319 static void mousedev_touchpad_touch(struct mousedev *mousedev, int value)  in mousedev_touchpad_touch()  argument
322 		if (mousedev->touch &&  in mousedev_touchpad_touch()
324 				mousedev->touch + msecs_to_jiffies(tap_time))) {  in mousedev_touchpad_touch()
330 			set_bit(0, &mousedev->packet.buttons);  in mousedev_touchpad_touch()
332 			mousedev_notify_readers(mousedev, &mousedev_mix->packet);  in mousedev_touchpad_touch()
335 			clear_bit(0, &mousedev->packet.buttons);  in mousedev_touchpad_touch()
338 		mousedev->touch = mousedev->pkt_count = 0;  in mousedev_touchpad_touch()
339 		mousedev->frac_dx = 0;  in mousedev_touchpad_touch()
340 		mousedev->frac_dy = 0;  in mousedev_touchpad_touch()
342 	} else if (!mousedev->touch)  in mousedev_touchpad_touch()
343 		mousedev->touch = jiffies;  in mousedev_touchpad_touch()
349 	struct mousedev *mousedev = handle->private;  in mousedev_event()  local
360 						mousedev, code, value);  in mousedev_event()
362 			mousedev_abs_event(handle->dev, mousedev, code, value);  in mousedev_event()
367 		mousedev_rel_event(mousedev, code, value);  in mousedev_event()
374 				mousedev_touchpad_touch(mousedev, value);  in mousedev_event()
376 				mousedev_key_event(mousedev, code, value);  in mousedev_event()
382 			if (mousedev->touch) {  in mousedev_event()
383 				mousedev->pkt_count++;  in mousedev_event()
393 			mousedev_notify_readers(mousedev, &mousedev->packet);  in mousedev_event()
394 			mousedev_notify_readers(mousedev_mix, &mousedev->packet);  in mousedev_event()
396 			mousedev->packet.dx = mousedev->packet.dy =  in mousedev_event()
397 				mousedev->packet.dz = 0;  in mousedev_event()
398 			mousedev->packet.abs_event = 0;  in mousedev_event()
413 	struct mousedev *mousedev = container_of(dev, struct mousedev, dev);  in mousedev_free()  local
415 	input_put_device(mousedev->handle.dev);  in mousedev_free()
416 	kfree(mousedev);  in mousedev_free()
419 static int mousedev_open_device(struct mousedev *mousedev)  in mousedev_open_device()  argument
423 	retval = mutex_lock_interruptible(&mousedev->mutex);  in mousedev_open_device()
427 	if (!mousedev->exist)  in mousedev_open_device()
429 	else if (!mousedev->open++) {  in mousedev_open_device()
430 		retval = input_open_device(&mousedev->handle);  in mousedev_open_device()
432 			mousedev->open--;  in mousedev_open_device()
435 	mutex_unlock(&mousedev->mutex);  in mousedev_open_device()
439 static void mousedev_close_device(struct mousedev *mousedev)  in mousedev_close_device()  argument
441 	mutex_lock(&mousedev->mutex);  in mousedev_close_device()
443 	if (mousedev->exist && !--mousedev->open)  in mousedev_close_device()
444 		input_close_device(&mousedev->handle);  in mousedev_close_device()
446 	mutex_unlock(&mousedev->mutex);  in mousedev_close_device()
454 static int mixdev_open_devices(struct mousedev *mixdev)  in mixdev_open_devices()
463 		struct mousedev *mousedev;  in mixdev_open_devices()  local
465 		list_for_each_entry(mousedev, &mousedev_mix_list, mixdev_node) {  in mixdev_open_devices()
466 			if (!mousedev->opened_by_mixdev) {  in mixdev_open_devices()
467 				if (mousedev_open_device(mousedev))  in mixdev_open_devices()
470 				mousedev->opened_by_mixdev = true;  in mixdev_open_devices()
484 static void mixdev_close_devices(struct mousedev *mixdev)  in mixdev_close_devices()
489 		struct mousedev *mousedev;  in mixdev_close_devices()  local
491 		list_for_each_entry(mousedev, &mousedev_mix_list, mixdev_node) {  in mixdev_close_devices()
492 			if (mousedev->opened_by_mixdev) {  in mixdev_close_devices()
493 				mousedev->opened_by_mixdev = false;  in mixdev_close_devices()
494 				mousedev_close_device(mousedev);  in mixdev_close_devices()
503 static void mousedev_attach_client(struct mousedev *mousedev,  in mousedev_attach_client()  argument
506 	spin_lock(&mousedev->client_lock);  in mousedev_attach_client()
507 	list_add_tail_rcu(&client->node, &mousedev->client_list);  in mousedev_attach_client()
508 	spin_unlock(&mousedev->client_lock);  in mousedev_attach_client()
511 static void mousedev_detach_client(struct mousedev *mousedev,  in mousedev_detach_client()  argument
514 	spin_lock(&mousedev->client_lock);  in mousedev_detach_client()
516 	spin_unlock(&mousedev->client_lock);  in mousedev_detach_client()
523 	struct mousedev *mousedev = client->mousedev;  in mousedev_release()  local
525 	mousedev_detach_client(mousedev, client);  in mousedev_release()
528 	mousedev->close_device(mousedev);  in mousedev_release()
536 	struct mousedev *mousedev;  in mousedev_open()  local
541 		mousedev = mousedev_mix;  in mousedev_open()
544 		mousedev = container_of(inode->i_cdev, struct mousedev, cdev);  in mousedev_open()
553 	client->mousedev = mousedev;  in mousedev_open()
554 	mousedev_attach_client(mousedev, client);  in mousedev_open()
556 	error = mousedev->open_device(mousedev);  in mousedev_open()
566 	mousedev_detach_client(mousedev, client);  in mousedev_open()
711 	wake_up_interruptible(&client->mousedev->wait);  in mousedev_write()
720 	struct mousedev *mousedev = client->mousedev;  in mousedev_read()  local
724 	if (!client->ready && !client->buffer && mousedev->exist &&  in mousedev_read()
728 	retval = wait_event_interruptible(mousedev->wait,  in mousedev_read()
729 			!mousedev->exist || client->ready || client->buffer);  in mousedev_read()
733 	if (!mousedev->exist)  in mousedev_read()
761 	struct mousedev *mousedev = client->mousedev;  in mousedev_poll()  local
764 	poll_wait(file, &mousedev->wait, wait);  in mousedev_poll()
766 	mask = mousedev->exist ? EPOLLOUT | EPOLLWRNORM : EPOLLHUP | EPOLLERR;  in mousedev_poll()
789 static void mousedev_mark_dead(struct mousedev *mousedev)  in mousedev_mark_dead()  argument
791 	mutex_lock(&mousedev->mutex);  in mousedev_mark_dead()
792 	mousedev->exist = false;  in mousedev_mark_dead()
793 	mutex_unlock(&mousedev->mutex);  in mousedev_mark_dead()
800 static void mousedev_hangup(struct mousedev *mousedev)  in mousedev_hangup()  argument
804 	spin_lock(&mousedev->client_lock);  in mousedev_hangup()
805 	list_for_each_entry(client, &mousedev->client_list, node)  in mousedev_hangup()
807 	spin_unlock(&mousedev->client_lock);  in mousedev_hangup()
809 	wake_up_interruptible(&mousedev->wait);  in mousedev_hangup()
812 static void mousedev_cleanup(struct mousedev *mousedev)  in mousedev_cleanup()  argument
814 	struct input_handle *handle = &mousedev->handle;  in mousedev_cleanup()
816 	mousedev_mark_dead(mousedev);  in mousedev_cleanup()
817 	mousedev_hangup(mousedev);  in mousedev_cleanup()
820 	if (mousedev->open)  in mousedev_cleanup()
842 static struct mousedev *mousedev_create(struct input_dev *dev,  in mousedev_create()
846 	struct mousedev *mousedev;  in mousedev_create()  local
856 	mousedev = kzalloc(sizeof(struct mousedev), GFP_KERNEL);  in mousedev_create()
857 	if (!mousedev) {  in mousedev_create()
862 	INIT_LIST_HEAD(&mousedev->client_list);  in mousedev_create()
863 	INIT_LIST_HEAD(&mousedev->mixdev_node);  in mousedev_create()
864 	spin_lock_init(&mousedev->client_lock);  in mousedev_create()
865 	mutex_init(&mousedev->mutex);  in mousedev_create()
866 	lockdep_set_subclass(&mousedev->mutex,  in mousedev_create()
868 	init_waitqueue_head(&mousedev->wait);  in mousedev_create()
871 		dev_set_name(&mousedev->dev, "mice");  in mousedev_create()
873 		mousedev->open_device = mixdev_open_devices;  in mousedev_create()
874 		mousedev->close_device = mixdev_close_devices;  in mousedev_create()
880 		dev_set_name(&mousedev->dev, "mouse%d", dev_no);  in mousedev_create()
882 		mousedev->open_device = mousedev_open_device;  in mousedev_create()
883 		mousedev->close_device = mousedev_close_device;  in mousedev_create()
886 	mousedev->exist = true;  in mousedev_create()
887 	mousedev->handle.dev = input_get_device(dev);  in mousedev_create()
888 	mousedev->handle.name = dev_name(&mousedev->dev);  in mousedev_create()
889 	mousedev->handle.handler = handler;  in mousedev_create()
890 	mousedev->handle.private = mousedev;  in mousedev_create()
892 	mousedev->dev.class = &input_class;  in mousedev_create()
894 		mousedev->dev.parent = &dev->dev;  in mousedev_create()
895 	mousedev->dev.devt = MKDEV(INPUT_MAJOR, minor);  in mousedev_create()
896 	mousedev->dev.release = mousedev_free;  in mousedev_create()
897 	device_initialize(&mousedev->dev);  in mousedev_create()
900 		error = input_register_handle(&mousedev->handle);  in mousedev_create()
905 	cdev_init(&mousedev->cdev, &mousedev_fops);  in mousedev_create()
907 	error = cdev_device_add(&mousedev->cdev, &mousedev->dev);  in mousedev_create()
911 	return mousedev;  in mousedev_create()
914 	mousedev_cleanup(mousedev);  in mousedev_create()
916 		input_unregister_handle(&mousedev->handle);  in mousedev_create()
918 	put_device(&mousedev->dev);  in mousedev_create()
925 static void mousedev_destroy(struct mousedev *mousedev)  in mousedev_destroy()  argument
927 	cdev_device_del(&mousedev->cdev, &mousedev->dev);  in mousedev_destroy()
928 	mousedev_cleanup(mousedev);  in mousedev_destroy()
929 	input_free_minor(MINOR(mousedev->dev.devt));  in mousedev_destroy()
930 	if (mousedev != mousedev_mix)  in mousedev_destroy()
931 		input_unregister_handle(&mousedev->handle);  in mousedev_destroy()
932 	put_device(&mousedev->dev);  in mousedev_destroy()
935 static int mixdev_add_device(struct mousedev *mousedev)  in mixdev_add_device()  argument
944 		retval = mousedev_open_device(mousedev);  in mixdev_add_device()
948 		mousedev->opened_by_mixdev = true;  in mixdev_add_device()
951 	get_device(&mousedev->dev);  in mixdev_add_device()
952 	list_add_tail(&mousedev->mixdev_node, &mousedev_mix_list);  in mixdev_add_device()
959 static void mixdev_remove_device(struct mousedev *mousedev)  in mixdev_remove_device()  argument
963 	if (mousedev->opened_by_mixdev) {  in mixdev_remove_device()
964 		mousedev->opened_by_mixdev = false;  in mixdev_remove_device()
965 		mousedev_close_device(mousedev);  in mixdev_remove_device()
968 	list_del_init(&mousedev->mixdev_node);  in mixdev_remove_device()
971 	put_device(&mousedev->dev);  in mixdev_remove_device()
978 	struct mousedev *mousedev;  in mousedev_connect()  local
981 	mousedev = mousedev_create(dev, handler, false);  in mousedev_connect()
982 	if (IS_ERR(mousedev))  in mousedev_connect()
983 		return PTR_ERR(mousedev);  in mousedev_connect()
985 	error = mixdev_add_device(mousedev);  in mousedev_connect()
987 		mousedev_destroy(mousedev);  in mousedev_connect()
996 	struct mousedev *mousedev = handle->private;  in mousedev_disconnect()  local
998 	mixdev_remove_device(mousedev);  in mousedev_disconnect()
999 	mousedev_destroy(mousedev);  in mousedev_disconnect()