On Fri, Feb 10, 2006 at 10:56:41AM +0100, michel Xhaard wrote: > Le Vendredi 10 F?vrier 2006 09:09, Greg KH a ?crit?: > > On Thu, Feb 09, 2006 at 11:52:46PM -0800, David Brownell wrote: > > > On Thursday 09 February 2006 12:32 am, Martin Diehl wrote: > > > > On Wed, 8 Feb 2006, Greg KH wrote: > > > > > > Driver needs to deal with several configurations with multiple > > > > > > interfaces each. Custom-designed protocol. Both bulk and iso > > > > > > endpoints with latency requirements. Not hard realtime, but > > > > > > response time is critical which became tricky when sharing locks > > > > > > f.e. > > > > > > > > > > Response time to incomming packets (to turn around and send something > > > > > else out?), or response time for something else (queuing, etc.)? > > > > > > > > Queueing was one issue. > > > > > > In what sense? You _can_ queue through usbfs, though I'd rather just > > > see the normal AIO calls work there ... lower overhead, simpler, etc. > > > > Yeah, I'm thinking it's time to dust off the design for usbfs2 soon :) > > > > thanks, > > > > greg k-h > > > > > Until usbfs2 come out, is there, somewhere, some sample code to deal with iso > packet in userspace? maybe usbfs can be used for GPL webcams driver to :)
I don't know of any sample code, but usbfs can be used for webcam drivers today, as isoc is supported.. Only thing you might need to worry about would be the v4l2 interface. thanks, greg k-h ------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. Do you grep through log files for problems? Stop! Download the new AJAX search engine that makes searching your log files as easy as surfing the web. DOWNLOAD SPLUNK! http://sel.as-us.falkag.net/sel?cmd=lnk&kid=103432&bid=230486&dat=121642 _______________________________________________ linux-usb-devel@lists.sourceforge.net To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
