Lines Matching refs:dev
223 static inline void tower_delete(struct lego_usb_tower *dev);
229 static void tower_check_for_read_packet(struct lego_usb_tower *dev);
248 static char *legousbtower_devnode(const struct device *dev, umode_t *mode)
250 return kasprintf(GFP_KERNEL, "usb/%s", dev_name(dev));
277 static inline void lego_usb_tower_debug_data(struct device *dev,
281 dev_dbg(dev, "%s - length = %d, data = %*ph\n",
289 static inline void tower_delete(struct lego_usb_tower *dev)
292 usb_free_urb(dev->interrupt_in_urb);
293 usb_free_urb(dev->interrupt_out_urb);
294 kfree(dev->read_buffer);
295 kfree(dev->interrupt_in_buffer);
296 kfree(dev->interrupt_out_buffer);
297 usb_put_dev(dev->udev);
298 kfree(dev);
307 struct lego_usb_tower *dev = NULL;
324 dev = usb_get_intfdata(interface);
325 if (!dev) {
331 if (mutex_lock_interruptible(&dev->lock)) {
338 if (dev->open_count) {
344 result = usb_control_msg_recv(dev->udev, 0,
351 dev_err(&dev->udev->dev,
358 dev->read_buffer_length = 0;
359 dev->read_packet_length = 0;
360 usb_fill_int_urb(dev->interrupt_in_urb,
361 dev->udev,
362 usb_rcvintpipe(dev->udev, dev->interrupt_in_endpoint->bEndpointAddress),
363 dev->interrupt_in_buffer,
364 usb_endpoint_maxp(dev->interrupt_in_endpoint),
366 dev,
367 dev->interrupt_in_interval);
369 dev->interrupt_in_done = 0;
372 retval = usb_submit_urb(dev->interrupt_in_urb, GFP_KERNEL);
374 dev_err(&dev->udev->dev,
380 file->private_data = dev;
382 dev->open_count = 1;
385 mutex_unlock(&dev->lock);
396 struct lego_usb_tower *dev;
399 dev = file->private_data;
400 if (dev == NULL) {
405 mutex_lock(&dev->lock);
407 if (dev->disconnected) {
410 /* unlock here as tower_delete frees dev */
411 mutex_unlock(&dev->lock);
412 tower_delete(dev);
417 if (dev->interrupt_out_busy) {
418 wait_event_interruptible_timeout(dev->write_wait, !dev->interrupt_out_busy,
423 usb_kill_urb(dev->interrupt_in_urb);
424 usb_kill_urb(dev->interrupt_out_urb);
426 dev->open_count = 0;
428 mutex_unlock(&dev->lock);
439 * dev->packet_timeout_jiffies, or until the buffer is full.
441 static void tower_check_for_read_packet(struct lego_usb_tower *dev)
443 spin_lock_irq(&dev->read_buffer_lock);
445 || time_after(jiffies, dev->read_last_arrival + dev->packet_timeout_jiffies)
446 || dev->read_buffer_length == read_buffer_size) {
447 dev->read_packet_length = dev->read_buffer_length;
449 dev->interrupt_in_done = 0;
450 spin_unlock_irq(&dev->read_buffer_lock);
459 struct lego_usb_tower *dev;
462 dev = file->private_data;
464 if (dev->disconnected)
467 poll_wait(file, &dev->read_wait, wait);
468 poll_wait(file, &dev->write_wait, wait);
470 tower_check_for_read_packet(dev);
471 if (dev->read_packet_length > 0)
473 if (!dev->interrupt_out_busy)
494 struct lego_usb_tower *dev;
500 dev = file->private_data;
503 if (mutex_lock_interruptible(&dev->lock)) {
509 if (dev->disconnected) {
516 dev_dbg(&dev->udev->dev, "read request of 0 bytes\n");
524 tower_check_for_read_packet(dev);
525 while (dev->read_packet_length == 0) {
530 retval = wait_event_interruptible_timeout(dev->read_wait, dev->interrupt_in_done, dev->packet_timeout_jiffies);
536 && (dev->read_buffer_length || dev->interrupt_out_busy)) {
544 tower_check_for_read_packet(dev);
548 bytes_to_read = min(count, dev->read_packet_length);
550 if (copy_to_user(buffer, dev->read_buffer, bytes_to_read)) {
555 spin_lock_irq(&dev->read_buffer_lock);
556 dev->read_buffer_length -= bytes_to_read;
557 dev->read_packet_length -= bytes_to_read;
558 for (i = 0; i < dev->read_buffer_length; i++)
559 dev->read_buffer[i] = dev->read_buffer[i+bytes_to_read];
560 spin_unlock_irq(&dev->read_buffer_lock);
566 mutex_unlock(&dev->lock);
578 struct lego_usb_tower *dev;
582 dev = file->private_data;
585 if (mutex_lock_interruptible(&dev->lock)) {
591 if (dev->disconnected) {
598 dev_dbg(&dev->udev->dev, "write request of 0 bytes\n");
603 while (dev->interrupt_out_busy) {
608 retval = wait_event_interruptible(dev->write_wait,
609 !dev->interrupt_out_busy);
616 dev_dbg(&dev->udev->dev, "%s: count = %zd, bytes_to_write = %zd\n",
619 if (copy_from_user(dev->interrupt_out_buffer, buffer, bytes_to_write)) {
625 usb_fill_int_urb(dev->interrupt_out_urb,
626 dev->udev,
627 usb_sndintpipe(dev->udev, dev->interrupt_out_endpoint->bEndpointAddress),
628 dev->interrupt_out_buffer,
631 dev,
632 dev->interrupt_out_interval);
634 dev->interrupt_out_busy = 1;
637 retval = usb_submit_urb(dev->interrupt_out_urb, GFP_KERNEL);
639 dev->interrupt_out_busy = 0;
640 dev_err(&dev->udev->dev,
648 mutex_unlock(&dev->lock);
660 struct lego_usb_tower *dev = urb->context;
665 lego_usb_tower_debug_data(&dev->udev->dev, __func__,
674 dev_dbg(&dev->udev->dev,
682 spin_lock_irqsave(&dev->read_buffer_lock, flags);
683 if (dev->read_buffer_length + urb->actual_length < read_buffer_size) {
684 memcpy(dev->read_buffer + dev->read_buffer_length,
685 dev->interrupt_in_buffer,
687 dev->read_buffer_length += urb->actual_length;
688 dev->read_last_arrival = jiffies;
689 dev_dbg(&dev->udev->dev, "%s: received %d bytes\n",
695 spin_unlock_irqrestore(&dev->read_buffer_lock, flags);
699 retval = usb_submit_urb(dev->interrupt_in_urb, GFP_ATOMIC);
701 dev_err(&dev->udev->dev, "%s: usb_submit_urb failed (%d)\n",
705 dev->interrupt_in_done = 1;
706 wake_up_interruptible(&dev->read_wait);
715 struct lego_usb_tower *dev = urb->context;
718 lego_usb_tower_debug_data(&dev->udev->dev, __func__,
725 dev_dbg(&dev->udev->dev,
730 dev->interrupt_out_busy = 0;
731 wake_up_interruptible(&dev->write_wait);
743 struct device *idev = &interface->dev;
745 struct lego_usb_tower *dev;
751 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
752 if (!dev)
755 mutex_init(&dev->lock);
756 dev->udev = usb_get_dev(udev);
757 spin_lock_init(&dev->read_buffer_lock);
758 dev->packet_timeout_jiffies = msecs_to_jiffies(packet_timeout);
759 dev->read_last_arrival = jiffies;
760 init_waitqueue_head(&dev->read_wait);
761 init_waitqueue_head(&dev->write_wait);
765 &dev->interrupt_in_endpoint,
766 &dev->interrupt_out_endpoint);
773 dev->read_buffer = kmalloc(read_buffer_size, GFP_KERNEL);
774 if (!dev->read_buffer)
776 dev->interrupt_in_buffer = kmalloc(usb_endpoint_maxp(dev->interrupt_in_endpoint), GFP_KERNEL);
777 if (!dev->interrupt_in_buffer)
779 dev->interrupt_in_urb = usb_alloc_urb(0, GFP_KERNEL);
780 if (!dev->interrupt_in_urb)
782 dev->interrupt_out_buffer = kmalloc(write_buffer_size, GFP_KERNEL);
783 if (!dev->interrupt_out_buffer)
785 dev->interrupt_out_urb = usb_alloc_urb(0, GFP_KERNEL);
786 if (!dev->interrupt_out_urb)
788 dev->interrupt_in_interval = interrupt_in_interval ? interrupt_in_interval : dev->interrupt_in_endpoint->bInterval;
789 dev->interrupt_out_interval = interrupt_out_interval ? interrupt_out_interval : dev->interrupt_out_endpoint->bInterval;
805 dev_info(&interface->dev,
812 usb_set_intfdata(interface, dev);
820 dev->minor = interface->minor;
823 dev_info(&interface->dev, "LEGO USB Tower #%d now attached to major "
824 "%d minor %d\n", (dev->minor - LEGO_USB_TOWER_MINOR_BASE),
825 USB_MAJOR, dev->minor);
831 tower_delete(dev);
843 struct lego_usb_tower *dev;
846 dev = usb_get_intfdata(interface);
848 minor = dev->minor;
854 usb_poison_urb(dev->interrupt_in_urb);
855 usb_poison_urb(dev->interrupt_out_urb);
857 mutex_lock(&dev->lock);
860 if (!dev->open_count) {
861 mutex_unlock(&dev->lock);
862 tower_delete(dev);
864 dev->disconnected = 1;
866 wake_up_interruptible_all(&dev->read_wait);
867 wake_up_interruptible_all(&dev->write_wait);
868 mutex_unlock(&dev->lock);
871 dev_info(&interface->dev, "LEGO USB Tower #%d now disconnected\n",