Le mardi 13 février 2007 à 15:37 -0500, Alan Stern a écrit :
> On Sat, 10 Feb 2007, Frédéric RISS wrote:
> 
> > > Yes, remote wakeup works under MacOS. I installed the MacOS USB 
> > > development
> > > packages which should allow me to dump some USB activity. Do you think
> > > there may be something useful in these logs?
> 
> Are you talking about waking up from Suspend-to-RAM or from 
> Suspend-to-Disk?

Suspend to RAM.

> > 
> >     UInt8       bmRequestType = 0x02
> >     UInt8       bRequest      = 0x01
> >     UInt16      wValue        = 0x0000
> >     UInt16      wIndex        = 0x83
> >     UInt16      wLength       = 0x0
> >     void *      pData         = ??
> >     UInt32      wLenDone      = ??
> 
> That request is just a Clear-Halt for endpoint 0x83.  I doubt that it has 
> anything to do with remote wakeup.

I've been fooled by the fact that this request was the only that seemed
to originate from the dedicated (closed) driver. In the mean time, I
managed to remove that driver, and it turns out the generic MacOS USB
stack was able to wakeup from sleep. I guess this rules out any kind of
device specific commands.

> > I can try to dig other information out of the traces, if someone tells
> > me what to look for.
> 
> Anything you can't understand...

Hehe... there's not much I understand in these logs, I'm not USB fluent.
I'll continue digging and try to match the traces with actual code in
Linux. I'm taking particular attention to UHCI and PCI config register
accesses. 

Thanks for your answer,
Fred.


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