This file describes all of the currently plugged in USB serial devices. usbserinfo:1.0 driver:v1.4 0: module:keyspan name:"Keyspan 1 port adapter" vendor:06cd product:0119 num_ports:1 port:1 ...

With [Ian]’s help, we now have a cheap source of USB to serial chips. If you need the datasheet, here you go. The driver is a bit more difficult to find, but what you’re looking for is the ...