How to access the CCA related operation

[Adrian Chadd]

There's TX_FRAME, RX_FRAME, RX_BUSY, etc state machine indications
that you can break out via GPIO pins..



-adrian


On 24 August 2015 at 09:32, Ben Greear <greearb at candelatech.com> wrote:
> 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 at netlab.snu.ac.kr
>> -------------------------------
>>
>>
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>> http://lists.infradead.org/mailman/listinfo/ath10k
>>
>
> --
> Ben Greear <greearb at candelatech.com>
> Candela Technologies Inc  http://www.candelatech.com
>
>
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