saport@linux:~$ lsusb -t -v
/: Bus 02.Port 1: Dev 1, Class=root_hub, Driver=tegra-xusb/4p, 5000M
/: Bus 01.Port 1: Dev 1, Class=root_hub, Driver=tegra-xusb/5p, 480M
|__ Port 3: Dev 2, If 0, Class=Wireless, Driver=btusb, 12M
|__ Port 3: Dev 2, If 1, Class=Wireless, Driver=btusb, 12M