Re: [HP6XX] - Handling make_ipr_irq with pints

[Kristoffer E. <kri...@gm...>]

Greetings,

On Mon, 23 Jul 2007 15:00:54 +0900
"Magnus Damm" <mag...@gm...> wrote:

> On 7/22/07, Paul Mundt <le...@li...> wrote:
> > On Sat, Jul 21, 2007 at 11:08:27PM -0700, Kristoffer Ericson wrote:
> > > Since fallout of make_ipr_irq Im not quite sure how to repair this for
> > > pint irq's. Ive looked at the dma-sh solution but not sure if thats the
> > > proper way to go.
> > >
> > At a quick glance, PINT seems to use a couple of IPR IRQs for cascade,
> > with the bulk of the logic in the demux. In this case, you're going to
> > want to make sure that your CPU includes those PINT vectors in its IPR
> > map, and then set up chained handlers for both where the PINT demux kicks
> > in as normal.
> >
> > None of that should be terribly difficult, though you are going to want
> > to convert your CPU subtype to the new INTC that Magnus wrote, he might
> > be able to give you some more input if you run in to some barriers doing
> > the conversion.
> 
> I'd be happy to convert the 7709 setup code to work with the new intc
> handler. And after that I can build pint support on top of intc as
> well. This needs to be tested though and I don't have any 7709
> hardware around. So if anyone could help out testing things that would
> be great. That would at least solve the issue of converting the 7709
> setup code to intc.

Ive already started but sounds great. I'll post what Ive done so far. I have machines/people to test it.

> 
> But maybe hp6xx hardware isn't enough to test pint. I wonder if it is
> using the pint interrupts at all. Hacking up pint support for a board
> that doesn't use it seems the wrong way to go...
> 
> The only board-specific irq constants that i can find being used on
> hp6xx seem to be located in hp6xx.h except for the IRQ number for
> hd644661 which is located in the config file as CONFIG_HD64461_IRQ=36.
> These values all seem to map to IRQ pins. The irq number 93 otoh, it
> is associated with the pata_platform setup data in
> arch/sh/boards/hp6xx/setup.c and that is pretty close to PINT_IRQ_BASE
> which seems to be set to 86. So maybe we have a pint interrupt there
> after all...

IRQ 0 is used to drive both PCMCIA/CF it maps against 94->95 and uses demux.

> 
> Kristoffer, do you have hp6xx hardware and some time for testing?
> 
> Thanks!
> 
> / magnus


-- 
Kristoffer Ericson <Kri...@Gm...>