USB CPIA interface specifications

How/where do I get the technical interface information to utilize the
devu-cpia class driver? I’d like to try out this driver with a CPIA chipset
based device. The company (VLSI) appears to have been bought out by Philips
and I can’t seems to find any information on the web.

Also is there any other CPIA based devices on the market like a video
frame-grabber (NTSC input) instead of a camera?