ath9k: Question regarding adaptivity and ETSI compliance

ath9k: Question regarding adaptivity and ETSI compliance

[Florian Hercher]

Hi all,

ETSI EN-300-328 in version 2.1.1 (2016-11) requires an "adaptive" behaviour of 
Wi-Fi Access Points, see clause 4.3.2.6.1 and annex B.7. As far as I 
understand this adaptive behavior requires the Wi-Fi card to stop transmitting 
whenever an (non Wi-Fi) interference signal with a power level of more than 
-70dBm/Mhz is present.

Does ath9k comply with this requirement? Or more specifically: Does ath9k 
running on a AR9331 (MAC version: AR9330, MAC revision: 1) comply?

Right now I'm trying to understand the "clear channel assessment" (CCA) 
related settings in the driver and I would like to ask for some clarification:

The CCA related definitions in ar9003_phy.h e.g. 
"AR_PHY_CCA_MAX_GOOD_VAL_9300_2GHZ" - are they part of the "higher" CCA 
function, where still decodable Wi-FI signals are handled?
Where is the energy detection threshold defined, is it "thres62" in "struct 
ar9300_eeprom"?

I'm quite confused about this and any help is highly appreciated!

best regards
Florian

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http://www.etsi.org/deliver/etsi_en/300300_300399/300328/02.01.01_60/
en_300328v020101p.pdf