Re: Clockport devices programming

[Radek Kujawa <radoslaw.kujawa%c0ff33.net@localhost>]

On Wed, Oct 06, 2010 at 01:19:28PM +0200, Frank Wille wrote:
> On Wed, 6 Oct 2010 11:53:23 +0200
> Radek Kujawa <radoslaw.kujawa%c0ff33.net@localhost> wrote:
> 
> > E3B Fa. created very nice USB controller for A1200 compatible
> > clockports - Subway. Michael Böhmer of E3B agreed to share
> > documentation with me, so I (hopefully) can create driver for NetBSD. 
> 
> Very nice project (although I don't own an A1200). I have a Deneb USB
> card from E3B and I wanted to ask for documentation, but didn't yet,
> because I was never sure to have enough time to finish it.

Cool, I have Deneb in my A3000 too, but can't use it now due to PSU failure. It 
is even more interesting because Deneb controller is not based around existing 
chip, but designed from scratch in FPGA. 

> > But I'm unsure if it is
> > possible to mix bus_space functions and VA which is returned from
> > ztwomap().
> 
> There are several examples doing that (e.g. wdc_amiga.c). You have to
> build the bus space tag yourself, by assigning the base from ztwomap(),
> e.g.:  sc->cmd_iot.base = (u_long)ztwomap(0xdd2020 + 2);
> 
> Then you can call bus_space_map() using the constructed tag.

Ok, I'll investigate it closely. Expect more noob questions ;).

Best regards,
Radoslaw Kujawa