After about 5 hours, and feeding it the GIP spec, an export of sniffed usb traffic from Windows, and prior art (xone driver for linux), I had it working. This continuously blows my mind that I dont have to beg a developer on Github to do it for me.
Claude could do it for me for $20.
And now I can print to it via my Mac.
It's a fun time to be alive.
Unfortunately, as I look around, I see most of the hardware vendors around me as gatekeepers. They prevent me from writing custom code in various ways. Apple restricts access to NFC or their UWB positioning, Supernote Manta does not let me access a bluetooth microphone, the list goes on. Denon at least has an API in their amps/receivers: buggy, but it's there.
https://wiki.debian.org/CUPSPrintQueues#hpuld
claude seems to have realized it was one of the samsung printer variants and just shoehorned in a samsung MFP driver to the OS.