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

Ben Greear greearb at candelatech.com
Mon Oct 16 10:57:51 PDT 2017

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.


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).


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

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