I don't know whether there is any development ongoing for the driver, perhaps crazycat can answer this.
Original avl6882 frontend driver developed by Luis Alves <[email protected]> (superset for avl6862):
Firmware load from file.
My fork contain some early version from Luis (static firmwares in avl6882_priv.h)
+ some my mods for real DVB-S/S2 and DVB-T2 UHF reception:
History for drivers/media/dvb-frontends/avl6882.c - crazycat69/linux_media · GitHub
Anyway TBS 5520 discontinued, TBS not use Avalink demods now.
P.S. All Multistandard TBS DVB devices now based on Si2183x (TBS 6522, 6528, 6590, 5520SE, 5580). This most powerfull budget demod (Silabs demods used in many TVs, advanced STB including latest Dreambox'es 4K, Octagon 4K and etc). .