61 struct mousedev {  struct
81 	int (*open_device)(struct mousedev *mousedev);  argument
82 	void (*close_device)(struct mousedev *mousedev);  argument
99 	struct mousedev *mousedev;  member
119 static struct mousedev *mousedev_mix;
122 #define fx(i)  (mousedev->old_x[(mousedev->pkt_count - (i)) & 03])
123 #define fy(i)  (mousedev->old_y[(mousedev->pkt_count - (i)) & 03])
126 				    struct mousedev *mousedev,  in mousedev_touchpad_event()  argument
137 		if (mousedev->touch && mousedev->pkt_count >= 2) {  in mousedev_touchpad_event()
144 			tmp += mousedev->frac_dx;  in mousedev_touchpad_event()
145 			mousedev->packet.dx = tmp / FRACTION_DENOM;  in mousedev_touchpad_event()
146 			mousedev->frac_dx =  in mousedev_touchpad_event()
147 				tmp - mousedev->packet.dx * FRACTION_DENOM;  in mousedev_touchpad_event()
153 		if (mousedev->touch && mousedev->pkt_count >= 2) {  in mousedev_touchpad_event()
161 			tmp += mousedev->frac_dy;  in mousedev_touchpad_event()
162 			mousedev->packet.dy = tmp / FRACTION_DENOM;  in mousedev_touchpad_event()
163 			mousedev->frac_dy = tmp -  in mousedev_touchpad_event()
164 				mousedev->packet.dy * FRACTION_DENOM;  in mousedev_touchpad_event()
170 static void mousedev_abs_event(struct input_dev *dev, struct mousedev *mousedev,  in mousedev_abs_event()  argument
187 		mousedev->packet.x = ((value - min) * xres) / size;  in mousedev_abs_event()
188 		mousedev->packet.abs_event = 1;  in mousedev_abs_event()
201 		mousedev->packet.y = yres - ((value - min) * yres) / size;  in mousedev_abs_event()
202 		mousedev->packet.abs_event = 1;  in mousedev_abs_event()
207 static void mousedev_rel_event(struct mousedev *mousedev,  in mousedev_rel_event()  argument
212 		mousedev->packet.dx += value;  in mousedev_rel_event()
216 		mousedev->packet.dy -= value;  in mousedev_rel_event()
220 		mousedev->packet.dz -= value;  in mousedev_rel_event()
225 static void mousedev_key_event(struct mousedev *mousedev,  in mousedev_key_event()  argument
256 		set_bit(index, &mousedev->packet.buttons);  in mousedev_key_event()
259 		clear_bit(index, &mousedev->packet.buttons);  in mousedev_key_event()
264 static void mousedev_notify_readers(struct mousedev *mousedev,  in mousedev_notify_readers()  argument
273 	list_for_each_entry_rcu(client, &mousedev->client_list, node) {  in mousedev_notify_readers()
279 		if (client->ready && p->buttons != mousedev->packet.buttons) {  in mousedev_notify_readers()
303 		p->buttons = mousedev->packet.buttons;  in mousedev_notify_readers()
319 		wake_up_interruptible(&mousedev->wait);  in mousedev_notify_readers()
322 static void mousedev_touchpad_touch(struct mousedev *mousedev, int value)  in mousedev_touchpad_touch()  argument
325 		if (mousedev->touch &&  in mousedev_touchpad_touch()
327 				mousedev->touch + msecs_to_jiffies(tap_time))) {  in mousedev_touchpad_touch()
333 			set_bit(0, &mousedev->packet.buttons);  in mousedev_touchpad_touch()
335 			mousedev_notify_readers(mousedev, &mousedev_mix->packet);  in mousedev_touchpad_touch()
338 			clear_bit(0, &mousedev->packet.buttons);  in mousedev_touchpad_touch()
341 		mousedev->touch = mousedev->pkt_count = 0;  in mousedev_touchpad_touch()
342 		mousedev->frac_dx = 0;  in mousedev_touchpad_touch()
343 		mousedev->frac_dy = 0;  in mousedev_touchpad_touch()
345 	} else if (!mousedev->touch)  in mousedev_touchpad_touch()
346 		mousedev->touch = jiffies;  in mousedev_touchpad_touch()
352 	struct mousedev *mousedev = handle->private;  in mousedev_event()  local
363 						mousedev, code, value);  in mousedev_event()
365 			mousedev_abs_event(handle->dev, mousedev, code, value);  in mousedev_event()
370 		mousedev_rel_event(mousedev, code, value);  in mousedev_event()
377 				mousedev_touchpad_touch(mousedev, value);  in mousedev_event()
379 				mousedev_key_event(mousedev, code, value);  in mousedev_event()
385 			if (mousedev->touch) {  in mousedev_event()
386 				mousedev->pkt_count++;  in mousedev_event()
396 			mousedev_notify_readers(mousedev, &mousedev->packet);  in mousedev_event()
397 			mousedev_notify_readers(mousedev_mix, &mousedev->packet);  in mousedev_event()
399 			mousedev->packet.dx = mousedev->packet.dy =  in mousedev_event()
400 				mousedev->packet.dz = 0;  in mousedev_event()
401 			mousedev->packet.abs_event = 0;  in mousedev_event()
416 	struct mousedev *mousedev = container_of(dev, struct mousedev, dev);  in mousedev_free()  local
418 	input_put_device(mousedev->handle.dev);  in mousedev_free()
419 	kfree(mousedev);  in mousedev_free()
422 static int mousedev_open_device(struct mousedev *mousedev)  in mousedev_open_device()  argument
426 	retval = mutex_lock_interruptible(&mousedev->mutex);  in mousedev_open_device()
430 	if (!mousedev->exist)  in mousedev_open_device()
432 	else if (!mousedev->open++) {  in mousedev_open_device()
433 		retval = input_open_device(&mousedev->handle);  in mousedev_open_device()
435 			mousedev->open--;  in mousedev_open_device()
438 	mutex_unlock(&mousedev->mutex);  in mousedev_open_device()
442 static void mousedev_close_device(struct mousedev *mousedev)  in mousedev_close_device()  argument
444 	mutex_lock(&mousedev->mutex);  in mousedev_close_device()
446 	if (mousedev->exist && !--mousedev->open)  in mousedev_close_device()
447 		input_close_device(&mousedev->handle);  in mousedev_close_device()
449 	mutex_unlock(&mousedev->mutex);  in mousedev_close_device()
457 static int mixdev_open_devices(struct mousedev *mixdev)  in mixdev_open_devices()
466 		struct mousedev *mousedev;  in mixdev_open_devices()  local
468 		list_for_each_entry(mousedev, &mousedev_mix_list, mixdev_node) {  in mixdev_open_devices()
469 			if (!mousedev->opened_by_mixdev) {  in mixdev_open_devices()
470 				if (mousedev_open_device(mousedev))  in mixdev_open_devices()
473 				mousedev->opened_by_mixdev = true;  in mixdev_open_devices()
487 static void mixdev_close_devices(struct mousedev *mixdev)  in mixdev_close_devices()
492 		struct mousedev *mousedev;  in mixdev_close_devices()  local
494 		list_for_each_entry(mousedev, &mousedev_mix_list, mixdev_node) {  in mixdev_close_devices()
495 			if (mousedev->opened_by_mixdev) {  in mixdev_close_devices()
496 				mousedev->opened_by_mixdev = false;  in mixdev_close_devices()
497 				mousedev_close_device(mousedev);  in mixdev_close_devices()
506 static void mousedev_attach_client(struct mousedev *mousedev,  in mousedev_attach_client()  argument
509 	spin_lock(&mousedev->client_lock);  in mousedev_attach_client()
510 	list_add_tail_rcu(&client->node, &mousedev->client_list);  in mousedev_attach_client()
511 	spin_unlock(&mousedev->client_lock);  in mousedev_attach_client()
514 static void mousedev_detach_client(struct mousedev *mousedev,  in mousedev_detach_client()  argument
517 	spin_lock(&mousedev->client_lock);  in mousedev_detach_client()
519 	spin_unlock(&mousedev->client_lock);  in mousedev_detach_client()
526 	struct mousedev *mousedev = client->mousedev;  in mousedev_release()  local
528 	mousedev_detach_client(mousedev, client);  in mousedev_release()
531 	mousedev->close_device(mousedev);  in mousedev_release()
539 	struct mousedev *mousedev;  in mousedev_open()  local
544 		mousedev = mousedev_mix;  in mousedev_open()
547 		mousedev = container_of(inode->i_cdev, struct mousedev, cdev);  in mousedev_open()
556 	client->mousedev = mousedev;  in mousedev_open()
557 	mousedev_attach_client(mousedev, client);  in mousedev_open()
559 	error = mousedev->open_device(mousedev);  in mousedev_open()
569 	mousedev_detach_client(mousedev, client);  in mousedev_open()
714 	wake_up_interruptible(&client->mousedev->wait);  in mousedev_write()
723 	struct mousedev *mousedev = client->mousedev;  in mousedev_read()  local
727 	if (!client->ready && !client->buffer && mousedev->exist &&  in mousedev_read()
731 	retval = wait_event_interruptible(mousedev->wait,  in mousedev_read()
732 			!mousedev->exist || client->ready || client->buffer);  in mousedev_read()
736 	if (!mousedev->exist)  in mousedev_read()
764 	struct mousedev *mousedev = client->mousedev;  in mousedev_poll()  local
767 	poll_wait(file, &mousedev->wait, wait);  in mousedev_poll()
769 	mask = mousedev->exist ? EPOLLOUT | EPOLLWRNORM : EPOLLHUP | EPOLLERR;  in mousedev_poll()
792 static void mousedev_mark_dead(struct mousedev *mousedev)  in mousedev_mark_dead()  argument
794 	mutex_lock(&mousedev->mutex);  in mousedev_mark_dead()
795 	mousedev->exist = false;  in mousedev_mark_dead()
796 	mutex_unlock(&mousedev->mutex);  in mousedev_mark_dead()
803 static void mousedev_hangup(struct mousedev *mousedev)  in mousedev_hangup()  argument
807 	spin_lock(&mousedev->client_lock);  in mousedev_hangup()
808 	list_for_each_entry(client, &mousedev->client_list, node)  in mousedev_hangup()
810 	spin_unlock(&mousedev->client_lock);  in mousedev_hangup()
812 	wake_up_interruptible(&mousedev->wait);  in mousedev_hangup()
815 static void mousedev_cleanup(struct mousedev *mousedev)  in mousedev_cleanup()  argument
817 	struct input_handle *handle = &mousedev->handle;  in mousedev_cleanup()
819 	mousedev_mark_dead(mousedev);  in mousedev_cleanup()
820 	mousedev_hangup(mousedev);  in mousedev_cleanup()
823 	if (mousedev->open)  in mousedev_cleanup()
845 static struct mousedev *mousedev_create(struct input_dev *dev,  in mousedev_create()
849 	struct mousedev *mousedev;  in mousedev_create()  local
859 	mousedev = kzalloc(sizeof(struct mousedev), GFP_KERNEL);  in mousedev_create()
860 	if (!mousedev) {  in mousedev_create()
865 	INIT_LIST_HEAD(&mousedev->client_list);  in mousedev_create()
866 	INIT_LIST_HEAD(&mousedev->mixdev_node);  in mousedev_create()
867 	spin_lock_init(&mousedev->client_lock);  in mousedev_create()
868 	mutex_init(&mousedev->mutex);  in mousedev_create()
869 	lockdep_set_subclass(&mousedev->mutex,  in mousedev_create()
871 	init_waitqueue_head(&mousedev->wait);  in mousedev_create()
874 		dev_set_name(&mousedev->dev, "mice");  in mousedev_create()
876 		mousedev->open_device = mixdev_open_devices;  in mousedev_create()
877 		mousedev->close_device = mixdev_close_devices;  in mousedev_create()
883 		dev_set_name(&mousedev->dev, "mouse%d", dev_no);  in mousedev_create()
885 		mousedev->open_device = mousedev_open_device;  in mousedev_create()
886 		mousedev->close_device = mousedev_close_device;  in mousedev_create()
889 	mousedev->exist = true;  in mousedev_create()
890 	mousedev->handle.dev = input_get_device(dev);  in mousedev_create()
891 	mousedev->handle.name = dev_name(&mousedev->dev);  in mousedev_create()
892 	mousedev->handle.handler = handler;  in mousedev_create()
893 	mousedev->handle.private = mousedev;  in mousedev_create()
895 	mousedev->dev.class = &input_class;  in mousedev_create()
897 		mousedev->dev.parent = &dev->dev;  in mousedev_create()
898 	mousedev->dev.devt = MKDEV(INPUT_MAJOR, minor);  in mousedev_create()
899 	mousedev->dev.release = mousedev_free;  in mousedev_create()
900 	device_initialize(&mousedev->dev);  in mousedev_create()
903 		error = input_register_handle(&mousedev->handle);  in mousedev_create()
908 	cdev_init(&mousedev->cdev, &mousedev_fops);  in mousedev_create()
910 	error = cdev_device_add(&mousedev->cdev, &mousedev->dev);  in mousedev_create()
914 	return mousedev;  in mousedev_create()
917 	mousedev_cleanup(mousedev);  in mousedev_create()
919 		input_unregister_handle(&mousedev->handle);  in mousedev_create()
921 	put_device(&mousedev->dev);  in mousedev_create()
928 static void mousedev_destroy(struct mousedev *mousedev)  in mousedev_destroy()  argument
930 	cdev_device_del(&mousedev->cdev, &mousedev->dev);  in mousedev_destroy()
931 	mousedev_cleanup(mousedev);  in mousedev_destroy()
932 	input_free_minor(MINOR(mousedev->dev.devt));  in mousedev_destroy()
933 	if (mousedev != mousedev_mix)  in mousedev_destroy()
934 		input_unregister_handle(&mousedev->handle);  in mousedev_destroy()
935 	put_device(&mousedev->dev);  in mousedev_destroy()
938 static int mixdev_add_device(struct mousedev *mousedev)  in mixdev_add_device()  argument
947 		retval = mousedev_open_device(mousedev);  in mixdev_add_device()
951 		mousedev->opened_by_mixdev = true;  in mixdev_add_device()
954 	get_device(&mousedev->dev);  in mixdev_add_device()
955 	list_add_tail(&mousedev->mixdev_node, &mousedev_mix_list);  in mixdev_add_device()
962 static void mixdev_remove_device(struct mousedev *mousedev)  in mixdev_remove_device()  argument
966 	if (mousedev->opened_by_mixdev) {  in mixdev_remove_device()
967 		mousedev->opened_by_mixdev = false;  in mixdev_remove_device()
968 		mousedev_close_device(mousedev);  in mixdev_remove_device()
971 	list_del_init(&mousedev->mixdev_node);  in mixdev_remove_device()
974 	put_device(&mousedev->dev);  in mixdev_remove_device()
981 	struct mousedev *mousedev;  in mousedev_connect()  local
984 	mousedev = mousedev_create(dev, handler, false);  in mousedev_connect()
985 	if (IS_ERR(mousedev))  in mousedev_connect()
986 		return PTR_ERR(mousedev);  in mousedev_connect()
988 	error = mixdev_add_device(mousedev);  in mousedev_connect()
990 		mousedev_destroy(mousedev);  in mousedev_connect()
999 	struct mousedev *mousedev = handle->private;  in mousedev_disconnect()  local
1001 	mixdev_remove_device(mousedev);  in mousedev_disconnect()
1002 	mousedev_destroy(mousedev);  in mousedev_disconnect()