lsusb -vt

/:  Bus 001.Port 001: Dev 001, Class=root_hub, Driver=ehci-pci/3p, 480M
    ID 1d6b:0002 Linux Foundation 2.0 root hub
    |__ Port 001: Dev 002, If 0, Class=Hub, Driver=hub/6p, 480M
        ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
/:  Bus 002.Port 001: Dev 001, Class=root_hub, Driver=ehci-pci/3p, 480M
    ID 1d6b:0002 Linux Foundation 2.0 root hub
    |__ Port 001: Dev 002, If 0, Class=Hub, Driver=hub/8p, 480M
        ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
/:  Bus 003.Port 001: Dev 001, Class=root_hub, Driver=xhci_hcd/4p, 480M
    ID 1d6b:0002 Linux Foundation 2.0 root hub
    |__ Port 001: Dev 008, If 0, Class=Vendor Specific Class, Driver=[none], 480M
        ID 0781:7420 SanDisk Corp. Sansa E200 series (mtp)
/:  Bus 004.Port 001: Dev 001, Class=root_hub, Driver=xhci_hcd/4p, 5000M
    ID 1d6b:0003 Linux Foundation 3.0 root hub