On Sun, 30 May 2010, Xiaofan Chen wrote: > > According to include/linux/usb/ch9.h, descriptor type 0x21 is > > USB_DT_WIRE_ADAPTER. I guess that's from the Wireless USB spec, but I > > don't know what it means. > > > > Anyway, it's not widely used at the moment so it's not surprising that > > lsusb doesn't recognize it. > > > > I think this has nothing to do with Wireless USB. I just > tried it for a simple Logitech Mouse. And same thing happens. > Then I tried PICKit 2, it has same problem. I think there is > an issue with the lsusb descriptor parser for the HID device. You're right; 0x21 is the identifier for HID descriptors. It isn't listed in the ch9.h header file, perhaps because it's a class-specific descriptor type. It is listed in include/linux/hid.h. I can't imagine why lsusb has problems with it. Obviously this should be fixed. Alan Stern -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
