Workaround for Raspberry Pi 400 Wi-Fi not working #23
Description
Let me leave here a workaround for the record. It is similar to #18 but a little bit different issue.
Wi-Fi doesn't work on Raspberry Pi 400 fresh AlmaLinux 9 image (20221116). Unfortunately, linux-firmware package doesn't contain any firmware for BCM43456 so it fails to load proper firmware.
# dmesg | grep brcmfmac
[ 19.848452] brcmfmac: F1 signature read @0x18000000=0x15294345
[ 19.859149] brcmfmac: brcmf_fw_alloc_request: using brcm/brcmfmac43456-sdio for chip BCM4345/9
[ 19.886424] brcmfmac mmc1:0001:1: Direct firmware load for brcm/brcmfmac43456-sdio.raspberrypi,400.bin failed with error -2
[ 19.902527] brcmfmac mmc1:0001:1: Direct firmware load for brcm/brcmfmac43456-sdio.bin failed with error -2
[ 19.968835] usbcore: registered new interface driver brcmfmac
[ 20.926139] brcmfmac: brcmf_sdio_htclk: HT Avail timeout (1000000): clkctl 0x50
Download the following 3 files from here: https://github.com/bsdkurt/brcm-supplemental
- brcmfmac43456-sdio.raspberrypi,400.bin
- brcmfmac43456-sdio.raspberrypi,400.clm_blob
- brcmfmac43456-sdio.raspberrypi,400.txt
Then put them in /lib/firemware/brcm and reboot. Other firmware files are xz compressed but compression is not necessary.
After reboot, Wi-Fi firmware will be loaded successfully and you'll get Wi-Fi working. Try nmcli device wifi list.
[ 8.911175] brcmfmac: F1 signature read @0x18000000=0x15294345
[ 8.963376] brcmfmac: brcmf_fw_alloc_request: using brcm/brcmfmac43456-sdio for chip BCM4345/9
[ 9.065806] usbcore: registered new interface driver brcmfmac
[ 9.226089] brcmfmac: brcmf_fw_alloc_request: using brcm/brcmfmac43456-sdio for chip BCM4345/9
[ 9.256216] brcmfmac: brcmf_c_preinit_dcmds: Firmware: BCM4345/9 wl0: May 14 2020 17:26:08 version 7.84.17.1 (r871554) FWID 01-3d9e1d87
[ 13.425989] brcmfmac: brcmf_cfg80211_set_power_mgmt: power save enabled
[ 13.986762] brcmfmac: brcmf_cfg80211_set_power_mgmt: power save enabled
[ 17.410402] brcmfmac: brcmf_cfg80211_set_power_mgmt: power save enabled