usb/core/hub.c

89  * 10 seconds to send reply for the initial 64-byte descriptor request.
91 /* define initial 64-byte descriptor request timeout in milliseconds */
95 		"initial 64-byte descriptor request timeout in milliseconds "
166 	/* Skip if the device BOS descriptor couldn't be read */
171 	 * their USB 2.0 Extended Capabilities BOS descriptor.
228 		hub->descriptor->u.ss.bHubHdrDecLat * 100;
236 	total_mel += (__le16_to_cpu(hub->descriptor->u.ss.wHubDelay) +
346 	/* Skip if the device BOS descriptor couldn't be read */
1453 	hub->descriptor = kzalloc(sizeof(*hub->descriptor), GFP_KERNEL);
1454 	if (!hub->descriptor) {
1459 	/* Request the entire hub descriptor.
1460 	 * hub->descriptor can handle USB_MAXCHILDREN ports,
1463 	ret = get_hub_descriptor(hdev, hub->descriptor);
1465 		message = "can't read hub descriptor";
1473 	if (hub->descriptor->bNbrPorts > maxchild) {
1477 	} else if (hub->descriptor->bNbrPorts == 0) {
1488 		u32 delay = __le16_to_cpu(hub->descriptor->u.ss.wHubDelay);
1497 	maxchild = hub->descriptor->bNbrPorts;
1507 	wHubCharacteristics = le16_to_cpu(hub->descriptor->wHubCharacteristics);
1522 			portstr[i] = hub->descriptor->u.hs.DeviceRemovable
1559 	switch (hdev->descriptor.bDeviceProtocol) {
1581 			hdev->descriptor.bDeviceProtocol);
1588 		if (hdev->descriptor.bDeviceProtocol != 0) {
1622 		hub->descriptor->bPwrOn2PwrGood * 2);
1646 			hub->descriptor->bHubContrCurrent;
1649 			hub->descriptor->bHubContrCurrent);
1740 	usb_hub_adjust_deviceremovable(hdev, hub->descriptor);
1748 	/* hub_disconnect() frees urb and descriptor */
1808 	kfree(hub->descriptor);
1919 		dev_err(&intf->dev, "bad descriptor, ignoring hub\n");
2362 	u16 bcdDevice = le16_to_cpu(udev->descriptor.bcdDevice);
2366 		le16_to_cpu(udev->descriptor.idVendor),
2367 		le16_to_cpu(udev->descriptor.idProduct),
2371 		udev->descriptor.iManufacturer,
2372 		udev->descriptor.iProduct,
2373 		udev->descriptor.iSerialNumber);
2399 	 * "host" to "peripheral".  The OTG descriptor helps figure this out.
2408 		/* descriptor may appear anywhere in config */
2493 	udev->product = usb_cache_string(udev, udev->descriptor.iProduct);
2495 					      udev->descriptor.iManufacturer);
2496 	udev->serial = usb_cache_string(udev, udev->descriptor.iSerialNumber);
2556 	wHubCharacteristics = le16_to_cpu(hub->descriptor->wHubCharacteristics);
2562 		if (le16_to_cpu(hub->descriptor->u.ss.DeviceRemovable)
2566 		if (hub->descriptor->u.hs.DeviceRemovable[port / 8] & (1 << (port % 8)))
2582  * enumerated.  The device descriptor is available, but not descriptors
3355  * association descriptor shows there's more than one function.
3381  * association descriptor shows there's more than one function.
4289 	/* Skip if the device BOS descriptor couldn't be read */
4743  * support bit in the BOS descriptor.
4779  * device's device descriptor.  Since we don't already know this value,
4784  * start of the device descriptor, which should work okay regardless of
4838 /* Reset device, (re)assign address, get device descriptor.
4849  * descriptor retrieved from the device will then be stored in
4850  * @udev->descriptor.  For an already existing device, @dev_descr
4851  * must be non-NULL.  The device descriptor will be stored there,
4852  * not in @udev->descriptor, because descriptors for registered
4922 			 * the device descriptor to get bMaxPacketSize0 and
4981 	 * first 8 bytes of the device descriptor to get the ep0 maxpacket
5004 					maxp0 != udev->descriptor.bMaxPacketSize0) {
5021 					dev_err(&udev->dev, "device descriptor read/64, error %d\n",
5071 					"device descriptor read/8, error %d\n",
5076 			if (!initial && maxp0 != udev->descriptor.bMaxPacketSize0) {
5100 	 * maxp0 is the value stored in the device descriptor;
5116 		/* Initial guess is wrong; use the descriptor's value */
5124 		/* Initial guess is wrong and descriptor's value is invalid */
5134 			dev_err(&udev->dev, "device descriptor read/all, error %d\n",
5139 		udev->descriptor = *descr;
5146 	 * and attached to a superspeed hub port, but the device descriptor
5151 			(le16_to_cpu(udev->descriptor.bcdUSB) < 0x0300)) {
5152 		dev_err(&udev->dev, "got a wrong device descriptor, warm reset device\n");
5160 	if (le16_to_cpu(udev->descriptor.bcdUSB) >= 0x0201) {
5222 	remaining = hdev->bus_mA - hub->descriptor->bHubContrCurrent;
5272 	if (memcmp(&udev->descriptor, new_device_descriptor,
5287 	 * device descriptor haven't changed, we will assume the
5296 	for (index = 0; index < udev->descriptor.bNumConfigurations; index++) {
5306 	for (index = 0; index < udev->descriptor.bNumConfigurations; index++) {
5328 		length = usb_string(udev, udev->descriptor.iSerialNumber,
5449 		/* reset (non-USB 3.0 devices) and get descriptor */
5467 		if (udev->descriptor.bDeviceClass == USB_CLASS_HUB
5494 		if (le16_to_cpu(udev->descriptor.bcdUSB) >= 0x0200
5628 						"can't read device descriptor %ld\n",
5634 							"device descriptor has changed\n");
6095 	struct usb_device_descriptor	descriptor;
6131 		ret = hub_port_init(parent_hub, udev, port1, i, &descriptor);
6141 	if (descriptors_changed(udev, &descriptor, bos)) {