Esempio n. 1
0
/* handles CDC Ethernet and many other network "bulk data" interfaces */
int usbnet_get_endpoints(struct usbnet *dev, struct usb_interface *intf)
{
	int				tmp;
	struct usb_host_interface	*alt = NULL;
	struct usb_host_endpoint	*in = NULL, *out = NULL;
	struct usb_host_endpoint	*status = NULL;

	for (tmp = 0; tmp < intf->num_altsetting; tmp++) {
		unsigned	ep;

		in = out = status = NULL;
		alt = intf->altsetting + tmp;

		/* take the first altsetting with in-bulk + out-bulk;
		 * remember any status endpoint, just in case;
		 * ignore other endpoints and altsetttings.
		 */
		for (ep = 0; ep < alt->desc.bNumEndpoints; ep++) {
			struct usb_host_endpoint	*e;
			int				intr = 0;

			e = alt->endpoint + ep;
			switch (e->desc.bmAttributes) {
			case USB_ENDPOINT_XFER_INT:
				if (!usb_endpoint_dir_in(&e->desc))
					continue;
				intr = 1;
				/* FALLTHROUGH */
			case USB_ENDPOINT_XFER_BULK:
				break;
			default:
				continue;
			}
			if (usb_endpoint_dir_in(&e->desc)) {
				if (!intr && !in)
					in = e;
				else if (intr && !status)
					status = e;
			} else {
				if (!out)
					out = e;
			}
		}
		if (in && out)
			break;
	}
	if (!alt || !in || !out)
		return -EINVAL;

	if (alt->desc.bAlternateSetting != 0 ||
	    !(dev->driver_info->flags & FLAG_NO_SETINT)) {
		tmp = usb_set_interface (dev->udev, alt->desc.bInterfaceNumber,
				alt->desc.bAlternateSetting);
		if (tmp < 0)
			return tmp;
	}

	dev->in = usb_rcvbulkpipe (dev->udev,
			in->desc.bEndpointAddress & USB_ENDPOINT_NUMBER_MASK);
	dev->out = usb_sndbulkpipe (dev->udev,
			out->desc.bEndpointAddress & USB_ENDPOINT_NUMBER_MASK);
	dev->status = status;
	return 0;
}
Esempio n. 2
0
/* handles CDC Ethernet and many other network "bulk data" interfaces */
int usbnet_get_endpoints(struct usbnet *dev)
{
	struct usb_device	*udev = dev->udev;
	int				tmp;
	struct usb_interface_descriptor	*alt = NULL;
	struct usb_endpoint_descriptor	*in = NULL, *out = NULL;
	struct usb_endpoint_descriptor	*status = NULL;

	for (tmp = 0; tmp < udev->config.no_of_if; tmp++) {
		unsigned	ep;

		in = out = status = NULL;
		alt = &udev->config.if_desc[tmp];

		/* take the first altsetting with in-bulk + out-bulk;
		 * remember any status endpoint, just in case;
		 * ignore other endpoints and altsetttings.
		 */
		for (ep = 0; ep < alt->bNumEndpoints; ep++) {
			struct usb_endpoint_descriptor	*e;
			int				intr = 0;

			e = &alt->ep_desc[ep];
			switch (e->bmAttributes) {
			case USB_ENDPOINT_XFER_INT:
				if (!usb_endpoint_dir_in(e))
					continue;
				intr = 1;
				/* FALLTHROUGH */
			case USB_ENDPOINT_XFER_BULK:
				break;
			default:
				continue;
			}
			if (usb_endpoint_dir_in(e)) {
				if (!intr && !in)
					in = e;
				else if (intr && !status)
					status = e;
			} else {
				if (!out)
					out = e;
			}
		}
		if (in && out)
			break;
	}

	if (!alt || !in || !out)
		return -EINVAL;

	if (alt->bAlternateSetting != 0
			|| !(dev->driver_info->flags & FLAG_NO_SETINT)) {
		tmp = usb_set_interface (dev->udev, alt->bInterfaceNumber,
				alt->bAlternateSetting);
		if (tmp < 0)
			return tmp;
	}

	dev->in = usb_rcvbulkpipe (dev->udev,
			in->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK);
	dev->out = usb_sndbulkpipe (dev->udev,
			out->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK);
	dev_dbg(&dev->edev.dev, "found endpoints: IN=%d OUT=%d\n",
			in->bEndpointAddress, out->bEndpointAddress);

	return 0;
}