> Hi, > > On Tue, Aug 13, 2013 at 08:04:26PM +0000, Paul Zimmerman wrote: > > > From: Felipe Balbi > > > Sent: Tuesday, August 13, 2013 12:20 PM > > > > > > On Mon, Aug 05, 2013 at 03:41:57PM +0000, Wang, Yu Y wrote: > > > > Hi Balbi, > > > > > > > > Please check the attached logs. The kernel base one kernel3.10. > > > > > > you didn't take the regdump after xHCI :-( I need to check if > > > erst_base is being mirrored to DEPCMDPAR* > > > > Hi Felipe, > > > > There seems to be some basic misunderstanding here. ALL versions of > > the Synopsys core share the internal RAM between device and host > > modes. So the only supported way of switching modes is to shut down > > the driver for the mode you are leaving, then start up the driver for > > the mode you are entering and re-initialize (most of) the registers. > > > > This is described in the databook in the OTG -> Software Flow and OTG > > -> Programming Model chapters. > > sure. > > > So whether a particular set of RAM-based registers is mirrored between > > modes does not matter. > > fair enough. > > > And I don't see what this has to do with hibernation? > > I have lost track of the conversation, probably. but I believe Yu mentioned > resetting the IP everytime when coming out of hibernation and, for whatever > reason, I confused myself with the other problem. > [Yu:] Correct. We have to re-initialization device and host stack before switch to corresponding mode. And we will planning to upstream some patches in the near future. Include one common DWC3 OTG driver which maintain one OTG state machine, support USB charger detection and role switch. And it need one hardware ops structure registered by platform dependent driver to implemented. And also have separate drivers for host/otg/udc implementation for Intel mobile platforms. If they can be merged. We will submit patches for hibernation feature base on them. We are still preparing clear up our patches. OTG and host almost done. The device mode patches still doing now. After all things done, I will send them to review. Thanks Balbi. > -- > balbi -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
