Re: USB2 transaction translator

[Matt Thomas <matt%3am-software.com@localhost>]

On May 10, 2011, at 7:57 AM, Jean-Yves Moulin wrote:

> Hi everybody,
> 
> I'm trying to use an uaudio(4) device on a sheevaplug. My problem is about 
> full-speed device connected to high-speed hub:
> 
> ehci0: error opening low/full speed isoc endpoint.
> ehci0: a low/full speed device is attached to a USB2 hub, and transaction 
> translations are not yet supported.
> ehci0: reattach the device to the root hub instead.
> 
> And my computer doesn't have an ohci or uhci hub (for usb-1.1)... It has only 
> a ehci (usb-2) hub. 
> 
> Do you know a solution for this ?
> 
> Or is there somebody working on transaction translator for ehci ? (this is in 
> a TODO list in /usr/src/sys/dev/usb/ehci.c)
> 
> If not,  I will try by myself but it seems a bit complicated :-)

Does the SheevaPlug EHCI support the embedded transaction translator function 
(ETTF)?  If so, setting the ETTF flag might help.