EHCI_PS_PE
EOWRITE4(sc, port, v & ~EHCI_PS_PE);
if (v & EHCI_PS_PE)
EOWRITE4(sc, port, v | EHCI_PS_PE);
v &= ~(EHCI_PS_PE | EHCI_PS_PR);
if (!(v & EHCI_PS_PE) &&