static int
xhci_pci_take_controller(device_t self)
{
struct xhci_softc *sc = device_get_softc(self);
uint32_t device_id = pci_get_devid(self);
uint32_t cparams;
uint32_t eecp;
uint32_t eec;
uint16_t to;
uint8_t bios_sem;
cparams = XREAD4(sc, capa, XHCI_HCSPARAMS0);
eec = -1;
/* Synchronise with the BIOS if it owns the controller. */
for (eecp = XHCI_HCS0_XECP(cparams) << 2; eecp != 0 && XHCI_XECP_NEXT(eec);
eecp += XHCI_XECP_NEXT(eec) << 2) {
eec = XREAD4(sc, capa, eecp);
if (XHCI_XECP_ID(eec) != XHCI_ID_USB_LEGACY)
continue;
bios_sem = XREAD1(sc, capa, eecp +
XHCI_XECP_BIOS_SEM);
if (bios_sem == 0)
continue;
device_printf(sc->sc_bus.bdev, "waiting for BIOS "
"to give up control\n");
XWRITE1(sc, capa, eecp +
XHCI_XECP_OS_SEM, 1);
to = 500;
while (1) {
bios_sem = XREAD1(sc, capa, eecp +
XHCI_XECP_BIOS_SEM);
if (bios_sem == 0)
break;
if (--to == 0) {
device_printf(sc->sc_bus.bdev,
"timed out waiting for BIOS\n");
break;
}
usb_pause_mtx(NULL, hz / 100); /* wait 10ms */
}
}
/* On Intel chipsets reroute ports from EHCI to XHCI controller. */
if (device_id == 0x1e318086 /* Panther Point */ ||
device_id == 0x8c318086 /* Lynx Point */) {
uint32_t temp = xhci_get_port_route();
pci_write_config(self, PCI_XHCI_INTEL_USB3_PSSEN, temp, 4);
pci_write_config(self, PCI_XHCI_INTEL_XUSB2PR, temp, 4);
}
return (0);
}
static int
xhci_pci_take_controller(device_t self)
{
struct xhci_softc *sc = device_get_softc(self);
uint32_t cparams;
uint32_t eecp;
uint32_t eec;
uint16_t to;
uint8_t bios_sem;
cparams = XREAD4(sc, capa, XHCI_HCSPARAMS0);
eec = -1;
/* Synchronise with the BIOS if it owns the controller. */
for (eecp = XHCI_HCS0_XECP(cparams) << 2; eecp != 0 && XHCI_XECP_NEXT(eec);
eecp += XHCI_XECP_NEXT(eec) << 2) {
eec = XREAD4(sc, capa, eecp);
if (XHCI_XECP_ID(eec) != XHCI_ID_USB_LEGACY)
continue;
bios_sem = XREAD1(sc, capa, eecp +
XHCI_XECP_BIOS_SEM);
if (bios_sem == 0)
continue;
device_printf(sc->sc_bus.bdev, "waiting for BIOS "
"to give up control\n");
XWRITE1(sc, capa, eecp +
XHCI_XECP_OS_SEM, 1);
to = 500;
while (1) {
bios_sem = XREAD1(sc, capa, eecp +
XHCI_XECP_BIOS_SEM);
if (bios_sem == 0)
break;
if (--to == 0) {
device_printf(sc->sc_bus.bdev,
"timed out waiting for BIOS\n");
break;
}
usb_pause_mtx(NULL, hz / 100); /* wait 10ms */
}
}
return (0);
}