I have a HTPC running 10.10 and am trying to get the firmware. I have tried the downloads from www.kernellabs.com and instructions from http://linuxtv.org/wiki/index.php/Hauppauge_WinTV-HVR-2200 for the saa1764 firmware, but I think these may not apply to the 3.2.0-24 kernel.
Well it's a lot easier than compiling it, here's the result:
The firmware did not make the upgrade. A new version has to be installed.
LowSky, long term supporter of this driver and Mythtv provides the download and instructions here. He says he will update if there is a change!