[LinuxBIOS] Geode GX1 PCI, VGA and Sound configuration -- was Re: Televideo TC7020 successfully booted with LinuxBiosV2

[Kenji Noguchi]

I changed the Subject.

2007/5/5, Peter Stuge <stuge-linuxbios at cdy.org>:
> On Fri, May 04, 2007 at 11:04:45PM -0700, Kenji Noguchi wrote:
> > //CS5530A
> > pdev = dev_find_slot(0, (0x12 << 3) + 0);
> > pci_write_config8(pdev, 0x5c, 0xab);
> > pci_write_config8(pdev, 0x5d, 0x09);
> > pci_assign_irqs(0, 0x13, usb_irq);
> > pci_assign_irqs(0, 0x15, nic_irq);
> >
> > I couldn't find a code in LinuxBIOSv2 that does the same thing
> > Where should I put these lines if such code does not exist, and
> > mainboard.c is not a right place?
>
> I think this goes into the mainboard Config.lb, where the PCI devices
> are listed.

I still don't understand fully how LB initializes stuff, or what the scope
of LB is in terms of PCI IRQ configuration.  So please bare with my noob
questions.

1) What is the name of the config options in the Config.lb for PCI
IRQ#  and IRQ sterring?
2) Where is the corresponding code that actually configures IRQ sterring
for CS5530?
3) Or, can/should I leave the configuration part to a OS as long as
irq_tables.c sets a proper irq_routing_table?   I've read about people
who booted LB with GX1 in the ML. Did they solely rely on the
irq_routin_table?

> > doesn't work:  VGA,
>
> Not even with geodefb?

I wasn't aware of the driver existed.  I loaded the driver but the
VGA is still not on.   I will read documents of the driver.

tv:~# modprobe gx1fb
gx1fb 0000:00:12.4: 4096 Kibyte of video memory at 0x40800000
Console: switching to colour frame buffer device 80x30
fb0: GX1 frame buffer device


> > Sound ,
>
> There is a FreeBSD driver but that doesn't help you of course. See if
> you can find a native CS5530 ALSA driver that does the same thing.

It seems the same topic was discussed in the ML sometime back.
Anyone still working on it? If not, I'll try to port the driver when I
have more time.

>> Reset(rebooting hangs the machine)
>
> Dunno about this one.

CONFIG_X86_REBOOTFIXUPS=y in ther kernel  config fixed the problem.

Thanks,
Kenji Noguchi