Re: How to access the CCA related operation

[Ben Greear <greearb@candelatech.com>]

On 08/24/2015 10:31 AM, Peter Oh wrote:
> There is WMI_10_x_SET_CCA_PARAMS_CMDID which to enable adaptive CCA in
> firmware supported since 10.2.4 and all the actual operations are done in
> firmware with registers as Ben addressed.
> But I'm not clear how much register doc or firmware doc are opened to public
> legally.

We have found no upstream firmware that actually seems to support that SET_CCA_PARAMS,
and I have no idea what that feature actually does since I have no firmware source
that supports that feature.

Thanks,
Ben

>
> Thanks,
> Peter
>
> -----Original Message-----
> From: ath10k [mailto:ath10k-bounces@lists.infradead.org] On Behalf Of Ben
> Greear
> Sent: Monday, August 24, 2015 9:33 AM
> To: Seowoo Jang; ath10k@lists.infradead.org
> Subject: Re: How to access the CCA related operation
>
> It is in firmware, and you cannot reliably poke it through the driver
> read/write register API because each time the radio resets (channel change,
> etc), it is liable to re-write the CCA registers back to default values.
>
> There is a large list of registers with 'CCA' in the name, but I don't know
> what they really mean, and I had hard time getting that info out of QCA.  If
> you have any better luck, please post whatever you can share.
>
> Thanks,
> Ben
>
>
> On 08/23/2015 11:21 PM, Seowoo Jang wrote:
>> Hello,
>>
>> We are trying to evaluate our idea on 802.11ac protocol with Atheros
>> qca9880 / ath10k driver.
>>
>> We would like to be able to access/know the result of the CCA (clear
>> channel
>> assessment) operation
>> or the level of interference on the carrier when we need.
>>
>> We have dug into the driver files and concluded that the CCA related
>> values are likely in the firmware or on the registers of the hardware.
>>
>> And please correct us if we are thinking wrong.
>>
>> We would appreciate the help if someone can give us some starting
>> points, such as the address of the register that stores the carrier
>> sensing values (CCA values) or the result of it (whether the carrier
>> is busy or idle), to investigate.
>>
>> The chipset we are using is compex WLE900VX-7AA.
>>
>> We are currently using Ubuntu 14.04.03 with kernel version 4.1.5, but
>> we can use any versions of OS and kernel if they support 802.11ac
>> bandwidth.
>>
>> Thank you for help in advance.
>>
>> -------------------------------
>> Seowoo Jang, Ph.D.
>> Ubiquitous Network Laboratory
>> EECS, Seoul National University
>>
>> CEL   +82-10-3723-3401
>> E-mail swjang@netlab.snu.ac.kr
>> -------------------------------
>>
>>
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>
> --
> Ben Greear <greearb@candelatech.com>
> Candela Technologies Inc  http://www.candelatech.com
>
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>

-- 
Ben Greear <greearb@candelatech.com>
Candela Technologies Inc  http://www.candelatech.com

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