Hi,
Just wanted to point out that I forked and patched the Salsa repo a while ago:
https://salsa.debian.org/onitake-guest/xserver-xorg-video-sunffb
Unfortunately, I couldn't get it reintroduced, not even into Debian ports.
If the project is still alive upstream, chances are a bit higher, I think. I still have two of these cards lying around.
Regards,
Gregor