more usb

[Nathan Andrews]

>>> rstevens at vitalstream.com 07/14/05 2:00 PM >>>
chuck lawrence wrote:
> Mark Knecht wrote:
> 
> | 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.
> 
> and then...
> 
> Rick Stevens <rstevens at vitalstream.com> wrote:
> 
> | "Spd=480" is 480Mbps and that's USB2.  If it said "Spd=12", NOW
you've
> | got USB1.1 (12Mbps), and now you know why they say USB2 is 40 times
> | faster than USB1.1 (480/12 = 40).  Simple, no?
> 
> 
> this is very helpful.  however, in my /proc/bus/usb/devices, I have...
> 
>  cat /proc/bus/usb/devices | grep Spd
> T:  Bus=02 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#=  1 Spd=12  MxCh= 3
> T:  Bus=01 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#=  1 Spd=12  MxCh= 3
> T:  Bus=01 Lev=01 Prnt=01 Port=00 Cnt=01 Dev#=  2 Spd=12  MxCh= 0
> T:  Bus=01 Lev=01 Prnt=01 Port=01 Cnt=02 Dev#=  3 Spd=12  MxCh= 0
>

If it helps, here's a list of my ports with no devices attached, as you
can see, one of them is reading 480 for spd:
# cat /proc/bus/usb/devices | grep Spd
T:  Bus=04 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#=  1 Spd=480 MxCh= 6
T:  Bus=03 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#=  1 Spd=12  MxCh= 2
T:  Bus=02 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#=  1 Spd=12  MxCh= 2
T:  Bus=01 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#=  1 Spd=12  MxCh= 2



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