Public bug reported:

Hi,

I am trying to make it work this device with the driver brcmsmac, since
seems is the only one that supports AP mode (and this is mandatory in
our case; all other drivers for this devices, including proprietary one,
does not support this mode).

When I issue sudo modprobe brcmsmac, this is what I get in logs:

cfg80211: Loading compiled-in X.509 certificates for regulatory database
cfg80211: Loaded X.509 cert 'sforshee: 00b28ddf47aef9cea7'
bcma-pci-bridge 0000:06:00.0: bus0: Found chip with id 0x4360, rev 0x03 and 
package 0x01
bcma-pci-bridge 0000:06:00.0: bus0: Core 0 found: ChipCommon (manuf 0x4BF, id 
0x800, rev 0x2B, class 0x0)
bcma-pci-bridge 0000:06:00.0: bus0: Core 1 found: IEEE 802.11 (manuf 0x4BF, id 
0x812, rev 0x2A, class 0x0)
bcma-pci-bridge 0000:06:00.0: bus0: Core 2 found: ARM CR4 (manuf 0x4BF, id 
0x83E, rev 0x02, class 0x0)
bcma-pci-bridge 0000:06:00.0: bus0: Core 3 found: PCIe Gen2 (manuf 0x4BF, id 
0x83C, rev 0x01, class 0x0)
bcma-pci-bridge 0000:06:00.0: bus0: Core 4 found: USB 2.0 Device (manuf 0x4BF, 
id 0x81A, rev 0x11, class 0x0)
bcma: Unsupported SPROM revision: 11
bcma-pci-bridge 0000:06:00.0: bus0: Invalid SPROM read from the PCIe card, 
trying to use fallback SPROM
bcma-pci-bridge 0000:06:00.0: bus0: Using fallback SPROM failed (err -2)
bcma-pci-bridge 0000:06:00.0: bus0: No SPROM available
bcma-pci-bridge 0000:06:00.0: bus0: Bus registered

Currently this PC is running Ubuntu 20.04 with kernel 5.8.0-50-generic
(using linux-image-generic-hwe-20.04-edge).

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: bcma bcma-pci-bridge brcm80211 brcmsmac

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https://bugs.launchpad.net/bugs/1924763

Title:
  Problems with brcmsmac driver and Broadcom BCM4360

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