Hi, On Wed, May 15, 2013 at 03:15:44PM +0100, Ben Dooks wrote: > >>>>It seems the board is very picky about what it will play host to > >>>>as neither of the mini-b to A adapters I have work. I am using > >>>>a mini B to mini B cable to run the card reader. > >>>> > >>>>I have still got the disable CMD_RESET patch in. > >>> > >>>yeah, there are a few issues regarding CMD_RESET bit on the XHCI side > >>>with that IP. We're still trying to find a proper workaround. > >> > >>Is replacing the xhci-hcd.c reset command with a call to the dwc3 > >>driver not enough? I will leave this for the moment if it is being > >>worked on. > >> > >>Even if we are just working in gadget mode, having the xhci-hcd driver > >>around causes the system to stop working. > > > >yeah, basically CMD_RESET (which is set during XHCI probe) causes some > >Global and Device Endpoint registers to corrupt. no workaround yet, > >other than constantly resetting the whole thing when you want to switch > >roles. > > > >What you can do, however, is to choose in Kconfig to have it working as > >peripheral only, then you're safe. > > Ok, I was under the impression that it was needed even for host only. > > We still have not managed to get a stable xhci host mode on the > OMAP5432-UEVM board at SuperSpeed. funny, we tested this a few days back. Right now I don't have HW with me (travelling), but Kishon has. Maybe he can help us out ? -- balbi
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