HelenOS sources
USB_CLASS_HUB 64 uspace/drv/bus/usb/usbhub/usbhub.c .interface_class = USB_CLASS_HUB, \
USB_CLASS_HUB 55 uspace/drv/bus/usb/vhc/hub/virthub.c .device_class = USB_CLASS_HUB,
USB_CLASS_HUB 69 uspace/drv/bus/usb/vhc/hub/virthub.c .interface_class = USB_CLASS_HUB,
USB_CLASS_HUB 148 uspace/drv/bus/usb/xhci/device.c if (desc->device_class != USB_CLASS_HUB)
USB_CLASS_HUB 61 uspace/lib/usb/src/class.c case USB_CLASS_HUB:
USB_CLASS_HUB 51 uspace/lib/usbvirt/src/virthub_descriptors.c .device_class = USB_CLASS_HUB,
USB_CLASS_HUB 65 uspace/lib/usbvirt/src/virthub_descriptors.c .interface_class = USB_CLASS_HUB,
HelenOS homepage, sources at GitHub