* Now that ah_configPCIE is called for both power on and suspend/resume,
make sure the right bit(s) are cleared and set when suspending and
resuming. Specifically:
+ force disable/enable the PCIe PHY upon suspend/resume;
+ reprogram the PCIe WAR register when resuming and upon power-on.
* Add a recipe which powers down any PCIe PHY hardware inside the AR5416
(which is the PCI variant) to save on power. I have (currently) no way
to test exactly how much power is saved, if any.
Tested on:
* AR5416 cardbus - although unfortunately pccard/cbb/cardbus currently
detaches the NIC upon suspend, I don't think it's a proper test case.
* AR5418 PCIe attached to expresscard - since we're not doing PCIe APSM,
it's also not likely a full/good test case.
In both instances I went through a handful of suspend/resume cycles and
ensured that the STA vap reassociated correctly.
TODO:
* Setup a laptop to simply sit in a suspend/resume loop, making sure that
the NIC always correctly comes back;
* Start doing suspend/resume tests with actual traffic going on in the
background, as I bet this process is all quite racy at the present;
* Test adhoc/hostap mode, just to be completely sure it's working correctly;
* See if I can jury rig an external power source to an AR5416 to test out
whether ah_disablePCIE() works.
Obtained from: Qualcomm Atheros
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