The “plot” is: I own a Terratec Cinergy XS FM, it's a USB Analog/TNT tuner, that used to be supported on Linux years ago. Unfortunately, the support stopped, so… it's now useless.
Earlier this year, as a challenge, I started working on it, so I could use it again with my laptop. I don't really need it, but it'd be great if it worked…
I'm currently having less spare time to work on this… but I don't loose hope.
More to come, maybe later. You can get the current sources _Here_. All external help is welcome !
Kinda unrelated but interesting about creating custom IOCTLs in Kernel module: