C++ (Cpp) uvc_input_init Examples

Example #1

File: uvc_status.c Project: xf739645524/kernel-rhel5

int uvc_status_init(struct uvc_device *dev)
{
	struct usb_host_endpoint *ep = dev->int_ep;
	unsigned int pipe;
	int interval;

	if (ep == NULL)
		return 0;

	uvc_input_init(dev);

	dev->int_urb = usb_alloc_urb(0, GFP_KERNEL);
	if (dev->int_urb == NULL)
		return -ENOMEM;

	pipe = usb_rcvintpipe(dev->udev, ep->desc.bEndpointAddress);

	/* For high-speed interrupt endpoints, the bInterval value is used as
	 * an exponent of two. Some developers forgot about it.
	 */
	interval = ep->desc.bInterval;
	if (interval > 16 && dev->udev->speed == USB_SPEED_HIGH &&
	    (dev->quirks & UVC_QUIRK_STATUS_INTERVAL))
		interval = fls(interval) - 1;

	usb_fill_int_urb(dev->int_urb, dev->udev, pipe,
		dev->status, sizeof dev->status, uvc_status_complete,
		dev, interval);

	return usb_submit_urb(dev->int_urb, GFP_KERNEL);
}

Example #2

int uvc_status_init(struct uvc_device *dev)
{
	struct usb_host_endpoint *ep = dev->int_ep;
	unsigned int pipe;
	int interval;

	if (ep == NULL)
		return 0;

	uvc_input_init(dev);

	dev->status = kzalloc(UVC_MAX_STATUS_SIZE, GFP_KERNEL);
	if (dev->status == NULL)
		return -ENOMEM;

	dev->int_urb = usb_alloc_urb(0, GFP_KERNEL);
	if (dev->int_urb == NULL) {
		kfree(dev->status);
		return -ENOMEM;
	}

	pipe = usb_rcvintpipe(dev->udev, ep->desc.bEndpointAddress);

	
	interval = ep->desc.bInterval;
	if (interval > 16 && dev->udev->speed == USB_SPEED_HIGH &&
	    (dev->quirks & UVC_QUIRK_STATUS_INTERVAL))
		interval = fls(interval) - 1;

	usb_fill_int_urb(dev->int_urb, dev->udev, pipe,
		dev->status, UVC_MAX_STATUS_SIZE, uvc_status_complete,
		dev, interval);

	return 0;
}