PCI trouble on mvebu (Turris Omnia)

[Marek Behun]

Are you using stock U-Boot in the Omnia?

Marek

On Tue, 27 Oct 2020 16:43:20 +0100
Toke Høiland-Jørgensen <toke at redhat.com> wrote:

> Hi everyone
> 
> I'm trying to get a mainline kernel to run on my Turris Omnia, and am
> having some trouble getting the PCI bus to work correctly. Specifically,
> I'm running a 5.10-rc1 kernel (torvalds/master as of this moment), with
> the resource request fix[0] applied on top.
> 
> The kernel boots fine, and the patch in [0] makes the PCI devices show
> up. But I'm still getting initialisation errors like these:
> 
> [    1.632709] pci 0000:01:00.0: BAR 0: error updating (0xe0000004 != 0xffffffff)
> [    1.632714] pci 0000:01:00.0: BAR 0: error updating (high 0x000000 != 0xffffffff)
> [    1.632745] pci 0000:02:00.0: BAR 0: error updating (0xe0200004 != 0xffffffff)
> [    1.632750] pci 0000:02:00.0: BAR 0: error updating (high 0x000000 != 0xffffffff)
> 
> and the WiFi drivers fail to initialise with what appears to me to be
> errors related to the bus rather than to the drivers themselves:
> 
> [    3.509878] ath: phy0: Mac Chip Rev 0xfffc0.f is not supported by this driver
> [    3.517049] ath: phy0: Unable to initialize hardware; initialization status: -95
> [    3.524473] ath9k 0000:01:00.0: Failed to initialize device
> [    3.530081] ath9k: probe of 0000:01:00.0 failed with error -95
> [    3.536012] ath10k_pci 0000:02:00.0: of_irq_parse_pci: failed with rc=134
> [    3.543049] pci 0000:00:02.0: enabling device (0140 -> 0142)
> [    3.548735] ath10k_pci 0000:02:00.0: can't change power state from D3hot to D0 (config space inaccessible)
> [    3.588592] ath10k_pci 0000:02:00.0: failed to wake up device : -110
> [    3.595098] ath10k_pci: probe of 0000:02:00.0 failed with error -110
> 
> lspci looks OK, though:
> 
> # lspci
> 00:01.0 PCI bridge: Marvell Technology Group Ltd. Device 6820 (rev 04)
> 00:02.0 PCI bridge: Marvell Technology Group Ltd. Device 6820 (rev 04)
> 00:03.0 PCI bridge: Marvell Technology Group Ltd. Device 6820 (rev 04)
> 01:00.0 Network controller: Qualcomm Atheros AR9287 Wireless Network Adapter (PCI-Express) (rev 01)
> 02:00.0 Network controller: Qualcomm Atheros QCA986x/988x 802.11ac Wireless Network Adapter (rev ff)
> 
> Does anyone have any clue what could be going on here? Is this a bug, or
> did I miss something in my config or other initialisation? I've tried
> with both the stock u-boot distributed with the board, and with an
> upstream u-boot from latest master; doesn't seem to make any different.
> 
> Any pointers will be greatly appreciated!
> 
> Thanks,
> 
> -Toke
> 
> 
> [0] https://lore.kernel.org/linux-pci/20201023145252.2691779-1-robh@kernel.org/