HI David,
I was just surprised that both Linux and Win2k seem to have the
same "bug". I've not had much time to test the card with the EHCI driver
and don't really have any motivation just now (I have not USB2 devices).
regards,
Stephen.
On Mon, 22 Oct 2001, David Brownell wrote:
> > There are [win2k] drivers for this card there but
> > when activated the same problem appeared as was evident with the Linux
> > EHCI driver from David. That is that 12Mbps speed devices disappear from
> > the bus when the EHCI driver is loaded (my only lowspeed device, a M$
> > Sidewinder JoyStick remains available). Does anyone know if there are
> > errata that would explain this?
>
> If it happens with the Linux driver, that's a bug ... what's supposed
> to happen is that (a) the EHCI code takes over all devices, then
> (b) re-enumerates them, ending up (c) handing all full [12 Mbps]
> and low [1.5 Mbps] devices back to the OHCI driver.
>
> In fact I've seen the driver work correctly in the past, but I've
> not retested that recently.
>
> There might be some root hub interaction problems in the latest
> code. (Just like there's a compiler problem; sometime after the
> 2.4.10 integration, someone changed those hub.c fields so the two
> variable length bitmaps are now represented as two fields, not
> one. Sigh -- it was better the other way, the second field can
> never be referenced by name.)
>
> - Dave
>
>
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