Re: PATA port not detected when using AHCI on Intel 82801GB/GR/GH

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> PATA_LEGACY Depends on: ATA [=y] && ATA_SFF [=y] && ISA [=n] && 
> EXPERIMENTAL [=y]                                            │
> 
> So I have to turn on ISA for it to build. But that's not possible on 
> x86_64 because it depends on X86_32. I'll try a 32bit build later, but 
> I'd really like to be able to stay on x86_64. Is there a workaround?

Remove the && ISA in Kconfig - that's bogus.

> Maybe I didn't make this clear enough, but the IDE DOM is not integrated 
> in the NAS. I bought it afterwards and inserted it in the PATA port. I 
> can just swap it for a 2.5" or 3.5" PATA harddisk if I want to.

Ok - well the PATA port seems not to be wired to the ICH. You could try
enabling the PATA port and seeing what happens I guess.

> Also, in both compatible and enhanced mode, the BIOS has no problem 
> booting off the PATA port (with the IDE DOM that i bought).

That I would expect - most BIOSes just use the legacy 0x170/0x1F0
interfaces and polled I/O. They don't care what the logic being driven is.

> That would make me think it's actually wired to the ICH. Maybe also to 
> the LPC bus but I'm not knowledgeable enough to know if thats even possible.

I'm not sure what occurs if you set up the address decode on the ICH for
the port and then hide it. Seems a strange thing to do but it might be
the case, and if so we can probably add a Linux quirk based on the DMI
data to unhide it.
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