[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 :
> 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

[Juergen Beisert]

On Tuesday 08 May 2007 04:40, Kenji Noguchi wrote:
> 2007/5/5, Peter Stuge :
> > 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.

On my system LinuxBIOS left all PCI irq registers at their reset value.
> 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?

Yes. With a working irq routing table and a (small) special Linux kernel patch 
(only with this patch Linux is able to setup the IRQ routing correctly. The 
patch was rejected in mainline, because it breaks other systems. The current 
kernel implementation is wrong, as it permuts the nibbles in the routing 
register. I have no idea how this could work on the other systems...)
> > > 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

Hmmm, should work. Don't know why it fails in your system.
> > > 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.

I'm working on it. And I can play sounds with it. But under higher system load 
it crashes yet. There is not interrupt available to setup the next sound data 
if the current one is finished. The hardware can only generate SMIs. So a 
second part of my driver polls the SMI statusbits and calls the sound driver 
when it flags "ready" for next data.
> > > Reset(rebooting hangs the machine)
> >
> > Dunno about this one.
>
> CONFIG_X86_REBOOTFIXUPS=y in ther kernel  config fixed the problem.

Ack.

I can send you my whole embedded project. It contains graphics (special 
framebuffer driver and Xorg, both with acceleration), audio (not finished 
yet), irq-routing table (but for my hardware only) and a build system to 
build a cross compiler and the root filesystem, kernel and LinuxBIOS.

Maybe it could help you. Sorry, documentation is not finished yet... ;-)

Juergen

[Luis Correia]

Hi!

my first report since the IEI Nova board was 'kinda' supported.

If I use irqpoll commandline switch, the system seems to work properly
but there are still IRQ related issues.

more comments below:

On 5/8/07, Juergen Beisert  wrote:
> On Tuesday 08 May 2007 04:40, Kenji Noguchi wrote:
> > 2007/5/5, Peter Stuge :
> > > 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.
>
> On my system LinuxBIOS left all PCI irq registers at their reset value.
> > 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?
>
> Yes. With a working irq routing table and a (small) special Linux kernel patch
> (only with this patch Linux is able to setup the IRQ routing correctly. The
> patch was rejected in mainline, because it breaks other systems. The current
> kernel implementation is wrong, as it permuts the nibbles in the routing
> register. I have no idea how this could work on the other systems...)

Where can I get this kernel patch?
> > > > 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
>
> Hmmm, should work. Don't know why it fails in your system.

i've given up setting up the VSA for the Geode.
Is there any workaround or any other thing we could use to enable VGA?

I'm lost here... :)

The VGA is not a priority for me as the main function for this board
is being a router. Only the serial port really matters and that one is
already working.

Besides, if the VGA is not enabled, the board is more power efficient
(not that is matters, it's more like an excuse)
> > > > 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.
>
> I'm working on it. And I can play sounds with it. But under higher system load
> it crashes yet. There is not interrupt available to setup the next sound data
> if the current one is finished. The hardware can only generate SMIs. So a
> second part of my driver polls the SMI statusbits and calls the sound driver
> when it flags "ready" for next data.
> > > > Reset(rebooting hangs the machine)
> > >
> > > Dunno about this one.
> >
> > CONFIG_X86_REBOOTFIXUPS=y in ther kernel  config fixed the problem.
>
> Ack.

My board does not reboot as well (a reset is needed) i'll investigate it also.
> I can send you my whole embedded project. It contains graphics (special
> framebuffer driver and Xorg, both with acceleration), audio (not finished
> yet), irq-routing table (but for my hardware only) and a build system to
> build a cross compiler and the root filesystem, kernel and LinuxBIOS.

I'm also interested in it, i'll contact you off list to sort out how
I could get it.

BTW, how good is it when decoding video streams?
> Maybe it could help you. Sorry, documentation is not finished yet... ;-)
>
> Juergen

Luis Correia

[Juergen Beisert]

Hi Correia,

On Tuesday 08 May 2007 10:05, Luis Correia wrote:
> If I use irqpoll commandline switch, the system seems to work properly
> but there are still IRQ related issues.

That is fine. With a running target like this you will be able to create a 
valid irq routing table. Documentation how to do I will send in a separated 
mail.
> Where can I get this kernel patch?

Attached.
> > > > > 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
> >
> > Hmmm, should work. Don't know why it fails in your system.
>
> i've given up setting up the VSA for the Geode.
> Is there any workaround or any other thing we could use to enable VGA?

Do not use any VSA. You really not need it.
> I'm lost here... :)
>
> The VGA is not a priority for me as the main function for this board
> is being a router. Only the serial port really matters and that one is
> already working.
>
> Besides, if the VGA is not enabled, the board is more power efficient
> (not that is matters, it's more like an excuse)

Sure.
> > > > > Reset(rebooting hangs the machine)
> > > >
> > > > Dunno about this one.
> > >
> > > CONFIG_X86_REBOOTFIXUPS=y in ther kernel  config fixed the problem.
> >
> > Ack.
>
> My board does not reboot as well (a reset is needed) i'll investigate it
> also.

My system reboots since my first try to run LinxuBIOS on it. So I have no idea 
what could be going wrong within your hardware.
> > I can send you my whole embedded project. It contains graphics (special
> > framebuffer driver and Xorg, both with acceleration), audio (not finished
> > yet), irq-routing table (but for my hardware only) and a build system to
> > build a cross compiler and the root filesystem, kernel and LinuxBIOS.
>
> I'm also interested in it, i'll contact you off list to sort out how
> I could get it.

You are welcome.
> BTW, how good is it when decoding video streams?

Due to the lack of video hardware (no NTSC/PAL decoder) in my system: No idea, 
sorry.

Juergen

[Uwe Hermann]

On Tue, May 08, 2007 at 09:04:55AM +0200, Juergen Beisert wrote:
> I can send you my whole embedded project. It contains graphics (special 
> framebuffer driver and Xorg, both with acceleration), audio (not finished 
> yet), irq-routing table (but for my hardware only) and a build system to 
> build a cross compiler and the root filesystem, kernel and LinuxBIOS.

Can you put this up on some website or maybe in the LinuxBIOS wiki? It
seems this will be very useful for lots of people...

Uwe.

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

[Jordan Crouse]

On 08/05/07 11:34 +0200, Uwe Hermann wrote:
> On Tue, May 08, 2007 at 09:04:55AM +0200, Juergen Beisert wrote:
> > I can send you my whole embedded project. It contains graphics (special 
> > framebuffer driver and Xorg, both with acceleration), audio (not finished 
> > yet), irq-routing table (but for my hardware only) and a build system to 
> > build a cross compiler and the root filesystem, kernel and LinuxBIOS.
>
> Can you put this up on some website or maybe in the LinuxBIOS wiki? It
> seems this will be very useful for lots of people...

Indeed.  This sounds like some interesting stuff we could integrate with
buildROM.

Jordan

[Juergen Beisert]

On Tuesday 08 May 2007 16:20, Jordan Crouse wrote:
> On 08/05/07 11:34 +0200, Uwe Hermann wrote:
> > On Tue, May 08, 2007 at 09:04:55AM +0200, Juergen Beisert wrote:
> > > I can send you my whole embedded project. It contains graphics (special
> > > framebuffer driver and Xorg, both with acceleration), audio (not
> > > finished yet), irq-routing table (but for my hardware only) and a build
> > > system to build a cross compiler and the root filesystem, kernel and
> > > LinuxBIOS.
> >
> > Can you put this up on some website or maybe in the LinuxBIOS wiki? It
> > seems this will be very useful for lots of people...
>
> Indeed.  This sounds like some interesting stuff we could integrate with
> buildROM.

Could someone explain me how to work with the LinuxBIOS wiki? Do I need an 
account? How to start?

Juergen

[ron minnich]

On 5/8/07, Juergen Beisert  wrote:
> Yes. With a working irq routing table and a (small) special Linux kernel patch
> (only with this patch Linux is able to setup the IRQ routing correctly. The
> patch was rejected in mainline, because it breaks other systems. The current
> kernel implementation is wrong, as it permuts the nibbles in the routing
> register. I have no idea how this could work on the other systems...)

This problem goes back six years. Fully half the GX1s on the planet
have a broken PIRQ table. It's enough to drive you crazy.

ron

[Juergen Beisert]

On Tuesday 08 May 2007 16:58, ron minnich wrote:
> On 5/8/07, Juergen Beisert  wrote:
> > Yes. With a working irq routing table and a (small) special Linux kernel
> > patch (only with this patch Linux is able to setup the IRQ routing
> > correctly. The patch was rejected in mainline, because it breaks other
> > systems. The current kernel implementation is wrong, as it permuts the
> > nibbles in the routing register. I have no idea how this could work on
> > the other systems...)
>
> This problem goes back six years. Fully half the GX1s on the planet
> have a broken PIRQ table. It's enough to drive you crazy.

:-))

Juergen

[Kenji Noguchi]

Hi,

It's pretty informative. Thanks.

2007/5/8, Juergen Beisert :
> On my system LinuxBIOS left all PCI irq registers at their reset value.
> > 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?
>
> Yes. With a working irq routing table and a (small) special Linux kernel patch
> (only with this patch Linux is able to setup the IRQ routing correctly. The
> patch was rejected in mainline, because it breaks other systems. The current
> kernel implementation is wrong, as it permuts the nibbles in the routing
> register. I have no idea how this could work on the other systems...)

ok, I think that's a right way that a payload or OS configures IRQ routing since
they need to initialize PCI controllers anyway, and it's not possible
for a bios to
configure all the add-on PCI devices.

My only concern is portability to other architecures. The struct
irq_routing_table
seems to be x86 PC specific.
> > > > Sound ,
>
> I'm working on it. And I can play sounds with it. But under higher system load
> it crashes yet. There is not interrupt available to setup the next sound data
> if the current one is finished. The hardware can only generate SMIs. So a
> second part of my driver polls the SMI statusbits and calls the sound driver
> when it flags "ready" for next data.

I noticed that CS5535 is very similiar to CS5530 except CS5535 has two more
DMAs.  I suspect the CS5535audio driver would work for CS5530 just by adding
PCI vendor/device ID.
> I can send you my whole embedded project. It contains graphics (special

I'm very much interested in it.  Please send it to me unless you are gonig to
put yout whole stuff to the wiki.  Thank you!

Kenji Noguchi

ps. anyone interested to port LB to MIPS?  gxemul is my target so far.

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

[Anton]

On Tue, 8 May 2007 11:15:25 -0700
"Kenji Noguchi"  wrote:
> ps. anyone interested to port LB to MIPS?  gxemul is my target so far.

Which CPU?

Thanks.