No chance of any code, really - it's quite nasty doing it properly from kernel.

You need to send it 0x01 0x00 0x01 (enumerate command, turn led on - change the last byte to 0x00 to turn the LED off) and you should get a reply of 0x01 0x00 0x03 0x03 (soh, command echo, tuner_id of 3, checksum). It's 19200, 8, none, 1.

Hugo