# dmesg | grep usb
usb0: OHCI version 1.0, legacy support
usb0: <AcerLabs M5237 (Aladdin-V) USB controller> on ohci0
usb0: USB revision 1.0
uhub0: <AcerLabs OHCI root hub, class 9/0, rev 1.00/1.00, addr 1> on usb0
usb1: OHCI version 1.0, legacy support
usb1: <AcerLabs M5237 (Aladdin-V) USB controller> on ohci1
usb1: USB revision 1.0
uhub1: <AcerLabs OHCI root hub, class 9/0, rev 1.00/1.00, addr 1> on usb1
usb2: OHCI version 1.0, legacy support
usb2: <AcerLabs M5237 (Aladdin-V) USB controller> on ohci2
usb2: USB revision 1.0
uhub2: <AcerLabs OHCI root hub, class 9/0, rev 1.00/1.00, addr 1> on usb2
usb3: EHCI version 1.0
usb3: companion controllers, 3 ports each: usb0 usb1 usb2
usb3: <ALi M5239 USB 2.0 controller> on ehci0
usb3: USB revision 2.0
uhub3: <AcerLabs EHCI root hub, class 9/0, rev 2.00/1.00, addr 1> on usb3
usb0: OHCI version 1.0, legacy support
usb0: <AcerLabs M5237 (Aladdin-V) USB controller> on ohci0
usb0: USB revision 1.0
uhub0: <AcerLabs OHCI root hub, class 9/0, rev 1.00/1.00, addr 1> on usb0
usb1: OHCI version 1.0, legacy support
usb1: <AcerLabs M5237 (Aladdin-V) USB controller> on ohci1
usb1: USB revision 1.0
uhub1: <AcerLabs OHCI root hub, class 9/0, rev 1.00/1.00, addr 1> on usb1
usb2: OHCI version 1.0, legacy support
usb2: <AcerLabs M5237 (Aladdin-V) USB controller> on ohci2
usb2: USB revision 1.0
uhub2: <AcerLabs OHCI root hub, class 9/0, rev 1.00/1.00, addr 1> on usb2
usb3: EHCI version 1.0
usb3: companion controllers, 3 ports each: usb0 usb1 usb2
usb3: <ALi M5239 USB 2.0 controller> on ehci0
usb3: USB revision 2.0
uhub3: <AcerLabs EHCI root hub, class 9/0, rev 2.00/1.00, addr 1> on usb3