Messages in this thread | | | Date | Tue, 5 Oct 1999 18:33:33 -0400 | From | Johannes Erdfelt <> | Subject | Re: USB device allocation |
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On Tue, Oct 05, 1999, Riley Williams <rhw@MemAlpha.CX> wrote: > Hi Pavel. > > > USB is getting into stage where it is actually usefull. And I've > > experienced first clashes with other devices. Therefore, it is > > time to allocate entries. > > > Previous numbers are unusable :-(: their either crash with > > existing device, or there's only convient room for one such > > device where around 16 are needed. > > How many really need 16? > > > XXX char USB devices > > 0 = /dev/usblp0 Printers connected via usb > > ... > > 15 = /dev/usblp15 > > 16 = /dev/usbmouse0 USB mouse > > ... > > 31 = /dev/usbmouse15 > > 32 = /dev/ezusb0 USB firmware downloader > > ... > > 63 = /dev/ezusb15 > > 64 = /dev/usbscanner0 USB HP scanner > > ... > > 95 = /dev/usbscanner15 > > 128 = /dev/ttyACM0 USB modem > > ... > > 255 = /dev/ttyACM127 > > Let's be a bit more reasonable... > > 0 => 31 USB Serial (Mouse or Modem) > 32 => 47 USB Printers > 48 => 63 USB Scanners > 64 => 79 USB Cameras > 80 => 95 USB Keyboards > 96 => 111 USB firmware downloaders > 112 => 239 Reserved for future definition > 240 => 255 USB Experimental > > Remember also that the names are reasonably irrelevant, and only the > node numbers actually matter.
For the immediate need of some sort of defination, I think this looks reasonable.
However, we do need to continue trying to find a solution to other problems PnP devices have, but of course not on linux-kernel :)
JE
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