Vojtech Pavlik wrote:
>
> On Sun, Aug 06, 2000 at 04:59:19PM +0200, Roman Weissgaerber wrote:
>
> > OHCI has no PCI I/O space, just memory space.
> >
> > And the OHCI Manual says (Page 135, Appendix A):
> >
> > ... In reference to the PCI Specification 2.1,
> > the Host Controller Driver will always allocate a
> > memory band of 4KB for the OpenHCI Host Controller's
> > operational registers as defined in Chapter 7.
> > This is despite the fact that the number of operational
> > registers defined by the OpenHCI Specification,
> > Release 1.0, is far less than 4KB. ...
> >
> > So we should allocate 4KB PCI memory space.
>
> Ok, good. What about the UHCI case? It's i/o mapped, and what minimum
> size?
>
UHCI needs 20 Byte for I/O Registers (for 2 ports).
If there are UHCI controllers with more than two ports then
you have to add 2 bytes for each additional port.
But I think 32 Byte could be the right value for every case.
Roman
> --
> Vojtech Pavlik
> SuSE Labs
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