On Thu, Aug 4, 2016 at 10:54 AM, Susanoo Tux <[email protected]> wrote:
> > > On Thu, Aug 4, 2016 at 11:18 PM, Dave Hylands <[email protected]> wrote: > >> >> On Thu, Aug 4, 2016 at 10:45 AM, Susanoo Tux <[email protected]> >> wrote: >> >>> >>> >>> On Thu, Aug 4, 2016 at 10:38 PM, Dave Hylands <[email protected]> >>> wrote: >>> >>>> >>>> ...snip... >> >>> Checkout Documentation/usb (in your kernel source tree). You'll find a >>>> bunch of files starting with the word gadget which describe the various >>>> gadget drivers and how to use them. >>>> >>> ...snip... >> >>> >>> Thanks for the reference, I gone through the configfs. And tried >>> creating it, but >>> it's not working. I am using x86, is that configfs method configures the >>> usb >>> controllers to behave a device ? because nothing is there >>> in /sys/class/udc/. >>> >> >> Yes - it requires that the USB controller be able to behave as a device. >> I've only used this on SoC's that had that capability (like gumstix or >> BeagleBone) and not on a desktop. >> >> -- >> Dave Hylands >> Shuswap, BC, Canada >> http://www.davehylands.com >> > > Yes, I can see the error in dmesg "couldn't find an available UDC - added > [g1] to list of pending drivers" :(. > > But I didn't get the meaning of this. May be one basic question, how to > check whether my desktop supports device/gadget mode? > It's been a while since I worked on this stuff, but I seem to recall that you need a USB device that supports OTG (On-The-Go). I believe that you can get PCI cards that support USB OTG. I suspect the USB hosts builtin to most x86 motherboards don't support it. But that's the feature you need to look for. -- Dave Hylands Shuswap, BC, Canada http://www.davehylands.com
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