[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]

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

[Michal Zygowski]

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
> _______________________________________________
> coreboot mailing list -- [e-mail]
> To unsubscribe send an email to [e-mail]

[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
> > _______________________________________________
> > coreboot mailing list -- [e-mail]
> > To unsubscribe send an email to [e-mail]
>
> coreboot mailing list -- [e-mail]
> To unsubscribe send an email to [e-mail]