Alan Stern wrote:
I don't think that approach will work with UHCI. Isn't there any standard way to tell, when you wake up, whether you were in D3hot vs. D3cold?
Well, what's the difference? Loss of VAUX power, as I recall. Does UHCI specify what VAUX protects? I don't remember it doing anything like that. But if the chip looks like it does in power-up reset, then that's likely what happened.
I don't think the UHCI spec says anything about how the different power levels are supposed to work.
That's an issue with UHCI and PM ... :)
I'd like to avoid resetting the entire bus upon resume if at all possible. Maybe a good approach will be to see if any ports are enabled. If some
are then presumably it's a warm start, and if not then a reset won't hurt.
Sounds like it should work.
- Dave
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