[PATCHv3 2/2] ath10k: Allow setting coverage class

Adrian Chadd adrian at freebsd.org
Mon Oct 16 10:59:47 PDT 2017

On 16 October 2017 at 10:57, Ben Greear <greearb at candelatech.com> wrote:
> On 08/25/2016 06:25 AM, Benjamin Berg wrote:
>> Unfortunately ath10k does not generally allow modifying the coverage class
>> with the stock firmware and Qualcomm has so far refused to implement this
>> feature so that it can be properly supported in ath10k. If we however know
>> the registers that need to be modified for proper operation with a higher
>> coverage class, then we can do these modifications from the driver.
>> This patch implements this hack for first generation cards which are based
>> on a core that is similar to ath9k. The registers are modified in place
>> and
>> need to be re-written every time the firmware sets them. To achieve this
>> the register status is verified after certain WMI events from the
>> firmware.
>> The coverage class may not be modified temporarily right after the card
>> re-initializes the registers. This is for example the case during
>> scanning.
>> Thanks to Sebastian Gottschall <s.gottschall at dd-wrt.com> for initially
>> working on a userspace support for this. This patch wouldn't have been
>> possible without this documentation.
> Hello,
> Do you happen to know the maximum distance that can work with this
> patch enabled?  The register value maximum seems to be 0x3FFF, but I
> am not sure of the units (nor how exactly that applies to distance).

It's in MAC clocks still, right? So it depends on how fast the MAC
clock timer runs.


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