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Hi chi-hsienl_21,
I checked the latest cypress-fmac-v4.14.77-2019_0503.
I am using raspberry bi 3b+ with CYW43455, and encountered some wifi 5g channel problems.
It seems that brcmf_construct_chaninfo() will clear all channel flags and disable all channels first, then enable by chanspecs from firmware data.
cfg80211.c#6392
if (band)
for (i = 0; i < band->n_channels; i++)
band->channels.flags = IEEE80211_CHAN_DISABLED;
I have 2 questions:
1. 40Mhz/80Mhz channel disabled flags will not be cleared, therefore linux command iw reg get will not show 40/80Mhz channels, though actually 40/80Mhz mode is ok to be used.
cfg80211.c#6440
if (ch.bw == BRCMU_CHAN_BW_80) {
channel->flags &= ~IEEE80211_CHAN_NO_80MHZ;
} else if (ch.bw == BRCMU_CHAN_BW_40) {
brcmf_update_bw40_channel_flag(channel, &ch);
2. the 2nd question is brcmf_construct_chaninfo() use most regulatory information from firmware, and wireless-regdb data is ignored. this will cause a lot of channels to be disabled if there's no firmware update for regulatory change. for example, when setting country=TW, only channel 56~64, 149~165 is enabled.
would you please help to check above problems. thanks.
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Hi,
1.Did you try using the wpa_supplicant command for changing the bandwifths.
2. We do provide regular updates to the CLM BLOB(regulatory binary that goes along with the firmware) for every release of the fmac.
Regards
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Hi Vinayak,
It looks like the firmware update zip doesn't include brcmfmac43430a0-sdio.bin or brcmfmac43430a0-sdio.clm_blob, would you be able to provide said files with the latest driver package (v4.14.77-2019_0503) ? This relates to the chip CYW4343SKUBG.
Thanks in advance,
Damien