get a linux working usbtv stick and disassemble it
for example
kworld vs-pvr-tv 305u ( dvb only ) have inside :
-tuner Xceive xc2028 source code driver http://git.kernel.org/?p=linux/kerne...6b5588faf5fb4b
-frontend Empia EM2860 source code http://git.kernel.org/?p=linux/kerne...6b5588faf5fb4b

so if you found source code for chips with some work a driver can be made.

tuner is one well known
[EM2870_BOARD_KWORLD_350U] = {
.name = "Kworld 350 U DVB-T",
.valid = EM28XX_BOARD_NOT_VALIDATED,
.tuner_type = TUNER_XC2028,
.tuner_gpio = default_tuner_gpio,}

any stick draw max 500 mA and a powered hub is needed