示例#1
0
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);
}
示例#2
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);
}