Re: Clockport devices configuration layer [was: Re: USB stack vs bus_dma_tag_t]

[Ignatios Souvatzis <is%netbsd.org@localhost>]

On Mon, Oct 18, 2010 at 11:57:28PM +0200, Radek Kujawa wrote:
> 
> Wiadomo?? napisana w dniu 2010-10-18, o godz. 23:04, przez Frank Wille:
> 
> >Radek Kujawa wrote:
> >
> >>>>clockport0 at mainbus addr 0xd80000 # A1200 mainboard clockport
> >>>>clockport* at zbus? # various Zorro clockports
> >>>>tduhc0 at clockport? # E3B SUBWAY USB Controller
> >>>
> >>>[...]
> >>>But what is a Zorro clockport? Does it really exist? Do you have
> >>>examples?
> >>
> >>It is simply a clockport located on a Zorro card. Best known Zorro
> >>cards with clockports include Individual Computers Buddha and X-Surf.
> >
> >Ok, but then the clockport should attach to that specific Zorro
> >card and not
> >to the zbus directly. For example:
> >
> >ne* at zbus0
> >clockport* at ne?        # X-surf clockport
> 
> I understand what you mean but... ne is a cross-platform driver for
> a NE2000 chip and it does know absolutely nothing about clockports.
> Why should it know? On a hardware level, clockport on these cards is
> attached to Zorro bus directly ;).

No, it is not. It is attached to part of the address space of the 
zbus card.

So you'd rather attach:

xsurf* at zbus0
ne* at xsurf?
clockport* at xsurf?

        -is