Shed some light into the darkness by giving a part of the setup a
dedicated name. This applies to the magic data blocks in the generic
setup entrypoint and some writes in the media handling. This was just
copied from the SDK which doesn't annotate this properly with
information. But we can clearly connect this with some other functions
of the SDK and extract meaningful information.
The mentioned magic blocks and register writes set coefficients of three
amplifiers in the TX path, a pre-amp, a main-amp and a post-amp. They
are used to tune the signal for different kinds of media. Generic values
are applied for all SerDes and further special values for different media
types depending on the needs.
Provide a dedicated function that sets these amplifier coefficients.
Replace the mystic register writes with the function call so one can see
at a glance what's happening. Also replace the magic TX values with the
coefficients organized into a separate struct. This might be extended
further and is also applicable for RTL930x.
Signed-off-by: Jonas Jelonek <jelonek.jonas@gmail.com>
Link: https://github.com/openwrt/openwrt/pull/22814
Signed-off-by: Robert Marko <robimarko@gmail.com>
aee4fd67cb