Mode of operation of xHCI controller.
This will also influence EHCI
controller settings since certain
combinations of those modes are not
allowed. 'SMART Auto' Mode is
requied for OS with external Driver
(e.g. Windows 7), 'Enabled' is
recommended for OS with integrated
USB 3.0 Support (e.g. Windows 8).
Please note, the USB HSIC Hub for
COMe USB Ports #4-7 is linked to
xHCI controller which allows
operation of these USB ports in OS
with USB 3.0 driver only (no support
in DOS or EFI Shell)
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