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:
>>>>> 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
>>>>> 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.

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