Re: force USB_SPEED_FULL for device

On 7/27/07, Till Harbaum / Lists <[email protected]> wrote:
> Hi,
>
> Am Freitag 27 Juli 2007 schrieb Gabriel Maganis:
> > I have one of those protocol analyzers in between and it doesn't see
> > anything. I tried to look for where the EPROTO is being returned from
>
> Where is this "in between"? Is it directly in front of the keyboard? I am
> quite sure that full speed messages are dropped by the hub the low speed
> device is connected to as it just can't forward the packet on the low speed
> link.
>
> If there was some seperate hub before the keyboard you might see
> something on this hubs upstream link as that is a full speed link.
>
> If your keyboard is directly connected to the pc you won't see anything
> with your analyzer since the root hub inside your pc does not forward
> the full speed packet to the usb output of your pc the low speed device
> is connected to.
>
> Till
>
Ah. I'm pretty sure the connection is such that the analyzer is a
passive listener i.e. the keyboard is connected to my computer, so
that means I have to modify some routine in hub.c to forward the
packet anyway?
I guess my question has been where might I look for the code that can
let me bypass the logic that prevents the root hub from forwarding
this packet?

Thanks!
Gabriel

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