On 01/09/13 14:08, Michael Trimarchi wrote: > Hi Neil > > I forget to answer to your questions > > On 01/09/2013 12:34 PM, NeilBrown wrote: >> On Wed, 09 Jan 2013 11:24:09 +0100 Michael Trimarchi >> <mich...@amarulasolutions.com> wrote: >> >>> Hi Neil >>> >>> On 01/09/2013 11:19 AM, NeilBrown wrote: >>>> On Wed, 09 Jan 2013 12:00:05 +0200 Igor Grinberg <grinb...@compulab.co.il> >>>> wrote: >>>> >>>>> -----BEGIN PGP SIGNED MESSAGE----- >>>>> Hash: SHA1 >>>> >>>>> Hi Neil, >>>> >>>>> On 01/09/13 00:29, NeilBrown wrote: >>>>>> >>>>>> Hi, >>>>>> I'm trying to get off_mode working reliably on my gta04 mobile phone. >>>>>> >>>>>> My current stumbling block is USB. The "Option" GSM module is attached >>>>>> via >>>>>> USB (there is a separate transceiver chip attached to port 1 which is >>>>>> placed >>>>>> in OMAP_EHCI_PORT_MODE_PHY). >>>> >>>>> Which PHY is this (vendor/model)? >>>> >>>> Hi Igor, >>>> it is the SMSC USB3322 >>>> >>>> http://www.smsc.com/media/Downloads_Public/Data_Sheets/3320.pdf >>>> >>>> >>>> BTW I subsequently discovered that keeping USBHOST out off off_mode only >>>> sometimes avoid the problem, not always. So there are probably multiple >>>> issues :-(
We have the same PHY and it has some issues with the OMAP USB code. First issue we experience is that if we reset the PHY more then once w/o power cycling it, the PHY dies until next power cycle. So, we stop providing the reset GPIO to the usb code and do the reset in the board code. >>> >>> Are you sure that you don't have glitch on power, reset pin during suspend? >>> >> >> No, I don't really have the equipment to measure such things. >> But is it likely? Would enabling off_mode make it more likely? > > I don't know the reason of the off_mode problem :( We have the equipment to check this and no - this is not the case. > >> Can you suggest some way I could test the hypothesis? > > I had the same problem on a rugged mobile phone, so it is just experience > Check the modem power and reset gpio too, but if you don't need to unblock it > with the pin after resume we know that modem is not the problem I don't think modem is the problem... We have plain USB connector ports that are dead after the resume from off-mode. The good news are that we have the off-mode working on v3.6.1, including the USB, but we had to do some horrible ugly hacking for this. -- Regards, Igor. -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
