The code is licensed under GPL so maybe you can get the source code from DreamMultimedia.
Code
filename: tu1216.ko
license: GPL
author: Ralph Metzler, Marcus Metzler, Michael Hunold, others
description: Generic TU1216 driver
description: Philips TDA10045H & TDA10046H DVB-T Demodulator
author: Andrew de Quincey & Robert Schlabbach
license: GPL
vermagic: 2.6.12.6 gcc-4.1
depends: fp
parm: debug:Turn on/off frontend debugging (default:off). (int)