On Tue, 2009-11-03 at 10:37 -0800, Greg KH wrote: > On Tue, Nov 03, 2009 at 01:13:16PM -0500, Adam Jackson wrote: > > On Tue, 2009-11-03 at 10:03 -0800, Ping wrote: > > > I need a quick answer since searching through the X server code takes > > > too long. > > > > > > Is there a way for me to get the bInterfaceNumber from a device HID > > > Descriptor inside an xorg Input device driver? I feel there should be > > > an existing mechanism to fulfil this, maybe through an ioctl call? > > > Can someone show me what parameter(s) I need to use if the ioctl is > > > supported? > > > > > > Please also reply to me if you know there is no existing way to get > > > the bInterfaceNumber inside an xorg device driver so I will add my own > > > workaround in the kernel driver. > > > > X doesn't have any particular knowledge of USB internally, you'll need > > to roll your own. > > As X has knowledge of PCI internally, perhaps we should add some basic > USB support as well to prevent people from having to add odd hacks to > kernel drivers for stuff like this?
I'm more inclined to say that different interfaces on the same USB device should be different event streams in /dev/input/event*. But I'm not completely sure what problem is being solved here; in particular, if the different interfaces would affect the same state machine, then that doesn't really work. - ajax
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