but sadly this is no longer available on dropbox
Post
RE: [HOW-TO] TBS 5520SE Drivers for LE11 & LE12 on RPi4
For those who only use the satellite tuner I modded the driver to disable the DVB-T/C tuner.
TBS 5520SE has 2 tuners attached to a single demod. DVB core apparently does not support 2 tuners on 1 demod so the driver used a hacky way to split the adapter in 2 virtual frontends. This cause all sorts of issues with tvheadend (e.g. "no free adapter available"). I modded the driver so si2157 DVB-T tuner is not attached and only 1 DVB-S frontend is created.
linux-666-tbs5520se-k66-no-ter.zip
TBS 5520SE has 2 tuners attached to a single demod. DVB core apparently does not support 2 tuners on 1 demod so the driver used a hacky way to split the adapter in 2 virtual frontends. This cause all sorts of issues with tvheadend (e.g. "no free adapter available"). I modded the driver so si2157 DVB-T tuner is not attached and only 1 DVB-S frontend is created.
linux-666-tbs5520se-k66-no-ter.zip
smp
Looks like PCI-E cards are handled by tbsecp3 driver. You will also need to add av201x tuner driver and gx1133 demod driver.