On Fri, Jul 26, 2013 at 12:53 PM, Bin Liu <binmlist@xxxxxxxxx> wrote: > Sebastian, > > On Fri, Jul 26, 2013 at 11:31 AM, Sebastian Andrzej Siewior > <bigeasy@xxxxxxxxxxxxx> wrote: >> * Bin Liu | 2013-07-23 13:55:27 [-0500]: >> >>>Hi Sebastian, >> Hi Bin, >> >>>either by SRP or HNP, or something else. In TI 3.2 kernel, there is >>>workaround in otg_timer() to _toggle_ the SESSION bit to detect if ID >>>pin is grounded, which means a USB device is connected. >> >> I've been looking at >> http://downloads.ti.com/sitara_linux/esd/AM335xSDK/latest/index_FDS.html >> >> and I can't find what you are talking about. My MUSB_DEVCTL doesn't >> change after I connect a device and the SESSION bit is not set. Also I >> remain in a_idle state. Do you have maybe a hint for me? :) > > In TI 3.2 kernel, the otg_timer() toggles the SESSION bit in > OTG_STATE_B_IDLE state. So whenever the ID pin is grounded by > connecting a device, the controller will try go into host mode. > But I have no idea why your board is in a_idle not b_idle. The toggle > does not handle a_idle. > > Do you use the AM335x GP EVM, not the smaller StarterKit EVM, right? > the USB0 port on SK EVM is device only. > > But anyway, I have not seen any use case which uses micro-AB > receptacle and requires such dynamic role switching. So I kind of I meant the real customer use cases, not the EVMs ;) -- 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
