[coreboot] Re: [fam16h AM1I-A] ehci-pci: can't derive routing for PCI INT B. USB 3.0 doesn't work even as USB 2.0

[Mike Banon]

Michal, thank you very much - your kind advice really helped me to
solve this problem! :)
Please review a solution at https://review.coreboot.org/c/coreboot/+/38241/

On Tue, Jan 7, 2020 at 12:12 PM Michal Zygowski
 wrote:
> Hi Mike,
>
> XHCI is muxed with EHCI on binaryPI 16h, so it might be teh same for
> fam16kb. When XHCI dev 10.0 is disabled, one has to flip bits in the PM
> registers additionally. If the board has no IRQ config for EHCI
> (probably because XHCI is the default supported option) you probably
> have to add these.
>
> From what I see in the irq_tables.c file for this board, there is no
> routing set for device 0x16.
> Secondly, there is no device 0x16 in the devicetree of AM1I-A.
> Moreover mainboard_{pirq,intr,picr}_data table does not contain entries
> for the EHCI 0x16 device at all so IRQ is not programmed (only USB 0x12
> and 0x13 devices are available from what i see). You would have to refer
> to a BKDG for your processor and chipset to check whether these problems
> I have listed are not copy-paste problems and EHCI 0x16 is really
> available for use without XHCI (IMO it should be).
>
> Regards,
> Michał
>
> On 06.01.2020 22:15, Mike Banon wrote:
> > My AM1I-A config is similar to G505S in this relation:
> >
> > # CONFIG_HUDSON_XHCI_FWM is not set
> > # CONFIG_HUDSON_XHCI_ENABLE is not set
> >
> > Since XHCI is disabled, I expect its' USB 3.0 ports to work as USB
> > 2.0, just like they are working on G505S. However, on AM1I-A they
> > don't work at all, and I see this at dmesg kernel log:
> >
> > ehci-pci 0000:00:16.2: can't derive routing for PCI INT B
> > ehci-pci 0000:00:16:2: PCI INT B: no GSI
> > ehci-pci 0000:00:16.2: Found HC with no IRQ. Check BIOS/PCI 0000:00:16.2 setup!
> > ehci-pci 0000:00:16:2: init 0000:00:16:2 fail, -19
> > ehci-platform: EHCI generic platform driver
> >
> > ohci-pci 0000:00:16.0: can't derive routing for PCI INT A
> > ohci-pci 0000:00:16:0: PCI INT A: no GSI
> > ohci-pci 0000:00:16.0: Found HC with no IRQ. Check BIOS/PCI 0000:00:16.0 setup!
> > ohci-pci 0000:00:16:0: init 0000:00:16:0 fail, -19
> > ohci-platform: OHCI generic platform driver
> >
> > I tried explicitly enabling 16.0 and 16.2 at devicetree.cb (they
> > weren't mentioned here), but it doesn't help. What are my next steps?
> >
> > Best regards,
> > Mike Banon
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