Pi 4 mod. B / BCM4345/6 / not set regulatory country code

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Assessment

Difficulty
4/5
Estimated time
3-5 days
Newbie friendliness
42/100
Issue type
Bug
Clarity
Mostly clear
Activity status
Quiet
Tech stack
c, linux
Domain
networking, operating-systems

Research direction

Start with the brcmfmac regulatory-country messages and compare the listed files in /usr/lib/firmware/cypress/ with the newer firmware from Infineon. Confirm which firmware is packaged for the Raspberry Pi 4 BCM4345/6 device, then verify that the country setting is accepted and the channel-setting errors no longer appear in dmesg.

Written by the indexing model from the issue text.

Description

Describe the bug
$ raspinfo
System Information
------------------

Raspberry Pi 4 Model B Rev 1.5
PRETTY_NAME="Debian GNU/Linux 12 (bookworm)"
NAME="Debian GNU/Linux"
VERSION_ID="12"
VERSION="12 (bookworm)"

Raspberry Pi reference 2024-11-19
Generated using pi-gen, https://github.com/RPi-Distro/pi-gen, 891df1e21ed2b6099a2e6a13e26c91dea44b34d4, stage4

Linux raspberrypi 6.6.74+rpt-rpi-v8 raspberrypi/bookworm-feedback#1 SMP PREEMPT Debian 1:6.6.74-1+rpt1 (2025-01-27) aarch64 GNU/Linux
Revision	: d03115
Serial		:
Model		: Raspberry Pi 4 Model B Rev 1.5
Throttled flag  : throttled=0x0
Camera          : supported=0 detected=0, libcamera interfaces=0



$ dmesg
...
[    0.076283] raspberrypi-firmware soc:firmware: Attached to firmware from 2024-11-26T12:52:28, variant start
[    0.080287] raspberrypi-firmware soc:firmware: Firmware hash is 2ae30f53898ae2f1ba77ff570a92991bedfb0398
...
[   18.738682] brcmfmac: brcmf_c_preinit_dcmds: Firmware: BCM4345/6 wl0: Aug 29 2023 01:47:08 version 7.45.265 (28bca26 CY) FWID 01-b677b91b
[   18.748360] ieee80211 phy0: brcmf_cfg80211_reg_notifier: Firmware rejected country setting
...
[   46.086090] ieee80211 phy0: brcmf_cfg80211_reg_notifier: Firmware rejected country setting
...
[ 1898.255613] ieee80211 phy0: brcmf_cfg80211_reg_notifier: Firmware rejected country setting
[ 1902.355723] brcmfmac: brcmf_set_channel: set chanspec 0x100c fail, reason -52
[ 1902.356167] brcmfmac: brcmf_set_channel: set chanspec 0x100d fail, reason -52
[ 1902.356576] brcmfmac: brcmf_set_channel: set chanspec 0xd022 fail, reason -52
[ 1902.467742] brcmfmac: brcmf_set_channel: set chanspec 0xd026 fail, reason -52
[ 1902.575619] brcmfmac: brcmf_set_channel: set chanspec 0xd02a fail, reason -52
...
[ 1954.246037] ieee80211 phy0: brcmf_cfg80211_reg_notifier: Firmware rejected country setting
...
Details to fix this yourself
  1. From the repository https://github.com/Infineon/ifx-linux-firmware downloaded the new firmware:
  1. Replaced the files in the directory /usr/lib/firmware/cypress/:
  • cyfmac43455-sdio.clm_blob
  • cyfmac43455-sdio-standard.bin
$ dmesg
...
[   12.948059] brcmfmac: brcmf_c_preinit_dcmds: Firmware: BCM4345/6 wl0: Oct 28 2024 23:27:00 version 7.45.286 (be70ab3 CY) FWID 01-95efe7fa
...
Dominant language
C
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