Hi, On Sun, Jun 23, 2013 at 11:14:44PM +0200, richard -rw- weinberger wrote: > USB Device does not have DMA support and is therefore very slow. > Also the USB mass storage gadget seems to need DMA.
I've successfully implemented mass storage on Iris without DMA (I don't have support for DMA in Iris yet). I don't know if Linux requires it, though. > The Linux driver supports it, but it is disabled by default and if I enable > DMA USB Devices does not work at all. > > Now I'm wondering, is this a known issue? It wasn't known to me, but that doesn't mean much. > Is DMA for the UDC just broken in HW? I would not expect this. However, it is quite possible that the implementation has a bug; the SoC's programmers manual is not always easy to understand. Thanks, Bas _______________________________________________ Qi Hardware Discussion List Mail to list (members only): [email protected] Subscribe or Unsubscribe: http://lists.en.qi-hardware.com/mailman/listinfo/discussion
