EHCI_PS_PE
EOWRITE4(sc, port, v &~ EHCI_PS_PE);
if (v & EHCI_PS_PE) i |= UPS_PORT_ENABLED;
EOWRITE4(sc, port, v | EHCI_PS_PE);
v &= ~EHCI_PS_PE;
v &= ~ (EHCI_PS_PE | EHCI_PS_PR);
if (!(v & EHCI_PS_PE)) {
if ((cmd & (EHCI_PS_PO|EHCI_PS_PE)) == EHCI_PS_PE)