[coreboot] using COM2 on Geode GX-1 system (v2)?

[Jackie Pan]

2008/9/9 Jonathan Sturges <jonathansturges at yahoo.com>

> Thanks for the quick reply!
> This board uses a National PC97317 Super-I/O chip, and the only reference
> to a serial port I see in auto.c is a call to function
> pc97317_enable_serial(), where it passes the value of TTYS0_BASE.  I guess
> that means something could be wrong with pc97317_enable_serial(), which I'll
> try to grok tomorrow.
>
> thanks,
> Jonathan
>
>
>
>
> ----- Original Message ----
> > From: Corey Osgood <corey.osgood at gmail.com>
> > To: Jonathan Sturges <jonathansturges at yahoo.com>
> > Cc: coreboot mailing list <coreboot at coreboot.org>
> > Sent: Monday, September 8, 2008 10:09:09 PM
> > Subject: Re: [coreboot] using COM2 on Geode GX-1 system (v2)?
> >
> > You also need to change it in the target's auto.c or
> > cache_as_ram_auto.c, you'll need to change both the IO base and the
> > com port. They're usually defines at the start of the file that you
> > have to change.
> >
> > -Corey
> >
> > On Mon, Sep 8, 2008 at 10:04 PM, Jonathan Sturges
> > wrote:
> > > Hi,
> > > I have a perfectly working coreboot v2 image for a GX-1 target of mine,
> but
> > when I tried to switch it from COM1 to COM2, I can't make it work.  I
> thought it
> > would be as easy as updating TTYS0_BASE from 0x3f8 to 0x2f8 in
> Options.lb, but
> > that doesn't work.  What's the trick to making this work?
> > >
> > > thanks,
> > > Jonathan
> > >
> > > --
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> > > coreboot at coreboot.org
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> > >
>
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>
try this:
pc97317_enable_serial(PC97317_SP2,TTYS0_BASE);

for the call, only the first parameter is relevant, and will determine which
physical port will be used. the second parameter
only determines which IO port your code uses to access it.
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