[OpenWrt-Devel] AR9344 pcie fails to start (sometimes)

[Helmut Schaa]

Hi,

Did anyone else see issues with ar9344 PCIe not coming up sometimes
(it is really rare in my case)?

Good boot dmesg:

[    0.070000] registering PCI controller with io_map_base unset
[    0.280000] bio: create slab <bio-0> at 0
[    0.280000] PCI host bridge to bus 0000:00
[    0.280000] pci_bus 0000:00: root bus resource [mem
0x10000000-0x13ffffff]
[    0.280000] pci_bus 0000:00: root bus resource [io  0x0000]
[    0.280000] pci_bus 0000:00: No busn resource found for root bus,
will use [bus 00-ff]
[    0.280000] pci 0000:00:00.0: [168c:0030] type 00 class 0x028000
[    0.280000] pci 0000:00:00.0: invalid calibration data
[    0.290000] pci 0000:00:00.0: reg 10: [mem 0x00000000-0x0001ffff
64bit]
[    0.290000] pci 0000:00:00.0: reg 30: [mem 0x00000000-0x0000ffff
pref]
[    0.290000] pci 0000:00:00.0: supports D1
[    0.290000] pci 0000:00:00.0: PME# supported from D0 D1 D3hot
[    0.290000] pci_bus 0000:00: busn_res: [bus 00-ff] end is updated to 00
[    0.290000] pci 0000:00:00.0: BAR 0: assigned [mem
0x10000000-0x1001ffff 64bit]
[    0.290000] pci 0000:00:00.0: BAR 6: assigned [mem
0x10020000-0x1002ffff pref]
[    0.290000] pci 0000:00:00.0: using irq 40 for pin 1

Bad boot dmesg:

[    0.070000] ar724x-pci ar724x-pci: PCIe link is down
[    0.070000] registering PCI controller with io_map_base unset
[    0.280000] bio: create slab <bio-0> at 0
[    0.280000] PCI host bridge to bus 0000:00
[    0.280000] pci_bus 0000:00: root bus resource [mem
0x10000000-0x13ffffff]
[    0.280000] pci_bus 0000:00: root bus resource [io  0x0000]
[    0.280000] pci_bus 0000:00: No busn resource found for root bus,
will use [bus 00-ff]
[    0.280000] pci_bus 0000:00: busn_res: [bus 00-ff] end is updated to 00

In this state no device is detected on the PCI bus.

Any ideas?

Thanks,
Helmut
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