Date: Tue, 18 Nov 2003 20:12:49 -0500 From: Jeff Walters <jeff@walters.name> To: current@freebsd.org Subject: Multifunction USB devices Message-ID: <200311182012.49724.jeff@walters.name>
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I have an Epson printer/scanner combo device (CX5200) which works just fine either as a printer or as a scanner (when I add the vendor and product codes to usbdevs and uscanner.c) but not both simultaneously. Currently I compile ulpt and my customized uscanner as modules, and to switch functions I power the device off, unload/load the appropriate kernel module, and power the device back on. I'm assuming a patch to add the CX5200 vendor/device codes to usbdevs and uscanner.c in the way I'm doing wouldn't be accepted into CURRENT since the resulting usage of it is a bit of a hack. Is that right? I wouldn't mind doing work over the next few months to create proper simultaneous support for both devices if it can be done with a reasonable level of effort and I can find some sources of information, and I can get some guidance from an experienced committer or architect to help do it right the first time. Where should I go for discussion? I'd like to learn ie. should I work to combine ulpt and uscanner into some kind of single umulti type of device driver, or should a virtual hub device of some kind be created to support both ulpt and uscanner simultaneously as-is (one USB endpoint, multiple interfaces), or should the system simply continue searching after matching a USB device, or will this be OBE with some other USB work going on, etc. Thanks, Jeff
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