On Fri, Mar 15, 2013 at 11:04:47PM +0200, Svetoslav Neykov wrote: > Hi Peter, > > >> There is a core on mips which doesn't support otg. From my point of > >> view, support for dual_role should be a separate patch, ideally by > >> Svetoslav (Cc'ed) who has this hardware, after we've cleaned up all > >> dr-mode related stuff. > > > >What means support OTG? The spec said it or there is a port > >DCCPARAMS_DC =1 but DCCPARAMS_HC = 0? > > > >From my point, I still think if DCCPARAMS_DC = 1, it is save to > >read OTGSC. > > From the mailing list I see you already figured it out already. In my > instance (AR9331 SoC) both DCCPARAMS_HC = 1 and DCCPARAMS_DC = 1. Even > though the chipidea controller supports both modes, the implementation in > the SoC doesn't map the OTGSC register in the address space. This makes it > impossible to detect OTG support by relying on the register content only and > the platform code needs to override the default behavior through dr_mode. > Just for information the host/device mode on this platform can only be > selected at boot, no switch is possible at runtime. Thanks for your information, I understand it now. > > Best regards, > Svetoslav. > > > > > -- > 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 > -- Best Regards, Peter Chen -- 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
