On Sun, 17 Apr 2005, Mike Lee wrote: > Hi all > I am now porting controller driver to I.MX motorola ARM9 , i am a > newbie to usb development. Please correct anything wrong. > > When i debug between with my FC3 linux PC, i found that it keep > asking the device for the DEVICE_QUALIFIER descriptor which only > support in USB2.0 .I finally change all the gadget driver bcdUSB to > 0x110 to make the host stop asking for any USB2.0 request. Is there > any better method to do that?
I thought you said you were debugging the controller driver. Why do you care what the gadget driver does? To answer your question: If a gadget driver doesn't support USB 2.0 -- including GET_DEVICE_QUALIFIER -- then it shouldn't set bcdUSB to 0x0200. > Would gadget driver queue any data when there is no OUT/IN from host? Yes. In fact, just about every gadget driver that uses IN or OUT transfers will queue a request before the corresponding packet arrives from the host. Alan Stern ------------------------------------------------------- SF email is sponsored by - The IT Product Guide Read honest & candid reviews on hundreds of IT Products from real users. Discover which products truly live up to the hype. Start reading now. http://ads.osdn.com/?ad_id=6595&alloc_id=14396&op=click _______________________________________________ linux-usb-devel@lists.sourceforge.net To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
