Re: [coreboot] Run PCI rom before PCI bus scan??

Quoting Peter Stuge :
> On Tue, Feb 05, 2008 at 02:49:52PM -0500, Corey Osgood wrote:
> > "In the LAN controller the D0 state is partitioned into two substates
> >
> > and
> >
> > "The integrated LAN controller will be disabled if no Platform LAN
> > Connect component is detected (See Section 5.2.1.3)."
> >
> > Any help?
>
> The first one isn't that interesting since it also implies that PCI
> config regs are actually available.
>
> The second one, or rather section 5.2.1.3, could be interesting if
> "Platform LAN Connect component" is usually found in the BIOS.
>
> //Peter

OK, here is what I have picked up reading, reading, and more reading:

1. When the system is powered on "At this point, the LAN
controller is in the D0u state"

2. The "Platform LAN Connect component" is actually a command script
(probibly a rom written in assembly) runs and sets up the CSR register
(I could setup a script in the mainboard directory and run from auto.c).

3. At this point it goes into a DOa state.

3. The "Platform LAN Connect component" hands it over to the bios
(coreboot) to setup "Memory, or I/O Base Registers in the PCI
Configuration space"

4. nic is setup and ready to go!

What do you think?

Thanks - Joe

Run PCI rom before PCI bus scan??

[Peter Stuge]

On Wed, Feb 06, 2008 at 10:10:10PM -0500, [e-mail] wrote:
> OK, here is what I have picked up reading, reading, and more
> reading:
> When the system is powered on "At this point, the LAN
>
> controller is in the D0u state"

Check.
> The "Platform LAN Connect component" is actually a command
>
> script (probibly a rom written in assembly) runs and sets up the
> CSR register

That would explain things.
> (I could setup a script in the mainboard directory and run from
> auto.c).

Sounds like a plan.
> At this point it goes into a DOa state.

Yep.
> The "Platform LAN Connect component" hands it over to the bios
>
> (coreboot) to setup "Memory, or I/O Base Registers in the PCI
> Configuration space"

Check. Though I don't think this is an active hand-over from the
connect component, rather that it is called from the BIOS, then
when it has finished the BIOS continues on.
> nic is setup and ready to go!
>
> What do you think?

This matches your observations and the datasheet quotes. Since the
Platform LAN Connect component is indeed software it is no doubt the
missing piece of your puzzle.

//Peter