usb info

[Mark Knecht]

On 7/13/05, Chuck Lawrence <CELawrence at lbl.gov> wrote:

> 1.  how can I determine, with some certainty, whether the bus is 1.1 or 2.0?

cat /proc/bus/usb/devices and look at the "Ver=" entry. From my Gentoo
laptop. Note: The driver is also a good clue, I think. ehci is 2.0.
ohci is 1.1.

flash ~ $ cat /proc/bus/usb/devices

T:  Bus=05 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#=  1 Spd=480 MxCh= 5
B:  Alloc=  0/800 us ( 0%), #Int=  0, #Iso=  0
D:  Ver= 2.00 Cls=09(hub  ) Sub=00 Prot=01 MxPS= 8 #Cfgs=  1
P:  Vendor=0000 ProdID=0000 Rev= 2.06
S:  Manufacturer=Linux 2.6.12-gentoo-r3 ehci_hcd
S:  Product=NEC Corporation USB 2.0
S:  SerialNumber=0000:02:07.2
C:* #Ifs= 1 Cfg#= 1 Atr=e0 MxPwr=  0mA
I:  If#= 0 Alt= 0 #EPs= 1 Cls=09(hub  ) Sub=00 Prot=00 Driver=hub
E:  Ad=81(I) Atr=03(Int.) MxPS=   2 Ivl=256ms