How to get medium (carrier-sense) information from Atheros chipsets?

How to get medium (carrier-sense) information from Atheros chipsets?

[Stefan Schwalowsky (inIT)]

Hello,
I'm working on a research project dealing with real-time capabilities of 
WLAN. Currently I'm analyzing the ATH5K driver and trying to find a way 
to get information about the medium state (carrier-sense state) . I want 
to check whether the medium is currently occupied by other stations or 
not. Is there a way to get the carrier sense information from the 
hardware through a status-register or so? (Currently we have a AR5413 
Chip, but any other would also be OK)  The only information i found was 
about the profile count registers, which doesn't really meet our 
requirements.

I greatly appreciate your help

Kind regards
Stefan Schwalowsky

Re: How to get medium (carrier-sense) information from Atheros chipsets?

[Jonathan Guerin]

Have a look at the ANI file in
/sys/kernel/debug/ieee80211/phyx/ath5k/ani

You will need to enable debugfs & debug entries for ath5k in your kernel config.

Alternatively, you can look at the patches Bruno Randolf added:
[PATCH 2/2] ath5k: Add channel time to survey data

Cheers,

--
Jonathan Guerin



On Tue, Dec 7, 2010 at 2:58 AM, Stefan Schwalowsky (inIT)
<stefan.schwalowsky@hs-owl.de> wrote:
> Hello,
> I'm working on a research project dealing with real-time capabilities of
> WLAN. Currently I'm analyzing the ATH5K driver and trying to find a way to
> get information about the medium state (carrier-sense state) . I want to
> check whether the medium is currently occupied by other stations or not. Is
> there a way to get the carrier sense information from the hardware through a
> status-register or so? (Currently we have a AR5413 Chip, but any other would
> also be OK)  The only information i found was about the profile count
> registers, which doesn't really meet our requirements.
>
> I greatly appreciate your help
>
> Kind regards
> Stefan Schwalowsky
>
> --
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