Esempio n. 1
0
static void qmi_wwan_unbind(struct usbnet *dev, struct usb_interface *intf)
{
	struct qmi_wwan_state *info = (void *)&dev->data;
	struct usb_driver *driver = driver_of(intf);
	struct usb_interface *other;

	if (info->subdriver && info->subdriver->disconnect)
		info->subdriver->disconnect(info->control);

	/* disable MDM9x30 quirk */
	if (le16_to_cpu(dev->udev->descriptor.bcdUSB) >= 0x0201) {
		qmi_wwan_change_dtr(dev, false);
		qmi_wwan_manage_power(dev, 0);
	}

	/* allow user to unbind using either control or data */
	if (intf == info->control)
		other = info->data;
	else
		other = info->control;

	/* only if not shared */
	if (other && intf != other) {
		usb_set_intfdata(other, NULL);
		usb_driver_release_interface(driver, other);
	}

	info->subdriver = NULL;
	info->data = NULL;
	info->control = NULL;
}
Esempio n. 2
0
static int qmi_wwan_cdc_wdm_manage_power(struct usb_interface *intf, int on)
{
	struct usbnet *dev = usb_get_intfdata(intf);

	/* can be called while disconnecting */
	if (!dev)
		return 0;
	return qmi_wwan_manage_power(dev, on);
}
Esempio n. 3
0
static int qmi_wwan_bind(struct usbnet *dev, struct usb_interface *intf)
{
	int status = -1;
	u8 *buf = intf->cur_altsetting->extra;
	int len = intf->cur_altsetting->extralen;
	struct usb_interface_descriptor *desc = &intf->cur_altsetting->desc;
	struct usb_cdc_union_desc *cdc_union;
	struct usb_cdc_ether_desc *cdc_ether;
	struct usb_driver *driver = driver_of(intf);
	struct qmi_wwan_state *info = (void *)&dev->data;
	struct usb_cdc_parsed_header hdr;

	BUILD_BUG_ON((sizeof(((struct usbnet *)0)->data) <
		      sizeof(struct qmi_wwan_state)));

	/* set up initial state */
	info->control = intf;
	info->data = intf;

	/* and a number of CDC descriptors */
	cdc_parse_cdc_header(&hdr, intf, buf, len);
	cdc_union = hdr.usb_cdc_union_desc;
	cdc_ether = hdr.usb_cdc_ether_desc;

	/* Use separate control and data interfaces if we found a CDC Union */
	if (cdc_union) {
		info->data = usb_ifnum_to_if(dev->udev,
					     cdc_union->bSlaveInterface0);
		if (desc->bInterfaceNumber != cdc_union->bMasterInterface0 ||
		    !info->data) {
			dev_err(&intf->dev,
				"bogus CDC Union: master=%u, slave=%u\n",
				cdc_union->bMasterInterface0,
				cdc_union->bSlaveInterface0);

			/* ignore and continue... */
			cdc_union = NULL;
			info->data = intf;
		}
	}

	/* errors aren't fatal - we can live with the dynamic address */
	if (cdc_ether) {
		dev->hard_mtu = le16_to_cpu(cdc_ether->wMaxSegmentSize);
		usbnet_get_ethernet_addr(dev, cdc_ether->iMACAddress);
	}

	/* claim data interface and set it up */
	if (info->control != info->data) {
		status = usb_driver_claim_interface(driver, info->data, dev);
		if (status < 0)
			goto err;
	}

	status = qmi_wwan_register_subdriver(dev);
	if (status < 0 && info->control != info->data) {
		usb_set_intfdata(info->data, NULL);
		usb_driver_release_interface(driver, info->data);
	}

	/* disabling remote wakeup on MDM9x30 devices has the same
	 * effect as clearing DTR. The device will not respond to QMI
	 * requests until we set DTR again.  This is similar to a
	 * QMI_CTL SYNC request, clearing a lot of firmware state
	 * including the client ID allocations.
	 *
	 * Our usage model allows a session to span multiple
	 * open/close events, so we must prevent the firmware from
	 * clearing out state the clients might need.
	 *
	 * MDM9x30 is the first QMI chipset with USB3 support. Abuse
	 * this fact to enable the quirk.
	 */
	if (le16_to_cpu(dev->udev->descriptor.bcdUSB) >= 0x0201) {
		qmi_wwan_manage_power(dev, 1);
		qmi_wwan_change_dtr(dev, true);
	}

	/* Never use the same address on both ends of the link, even if the
	 * buggy firmware told us to. Or, if device is assigned the well-known
	 * buggy firmware MAC address, replace it with a random address,
	 */
	if (ether_addr_equal(dev->net->dev_addr, default_modem_addr) ||
	    ether_addr_equal(dev->net->dev_addr, buggy_fw_addr))
		eth_hw_addr_random(dev->net);

	/* make MAC addr easily distinguishable from an IP header */
	if (possibly_iphdr(dev->net->dev_addr)) {
		dev->net->dev_addr[0] |= 0x02;	/* set local assignment bit */
		dev->net->dev_addr[0] &= 0xbf;	/* clear "IP" bit */
	}
	dev->net->netdev_ops = &qmi_wwan_netdev_ops;
	dev->net->sysfs_groups[0] = &qmi_wwan_sysfs_attr_group;
err:
	return status;
}
Esempio n. 4
0
static int qmi_wwan_cdc_wdm_manage_power(struct usb_interface *intf, int on)
{
	struct usbnet *dev = usb_get_intfdata(intf);
	return qmi_wwan_manage_power(dev, on);
}