Function mtk_pci_attach

freebsd/mips/mediatek/mtk_pcie.c:228–377

}

static int
mtk_pci_attach(device_t dev)
{
	struct mtk_pci_softc *sc = device_get_softc(dev);
	struct mtk_pci_range io_space, mem_space;
	phandle_t node;
	intptr_t xref;
	int i, rid;

	sc->sc_dev = dev;
	mt_sc = sc;
	sc->addr_mask = 0xffffffff;

	/* Request our memory */
	rid = 0;
	sc->pci_res[0] = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid,
			    RF_ACTIVE);
	if (sc->pci_res[0] == NULL) {
		device_printf(dev, "could not allocate memory resource\n");
		return (ENXIO);
	}

	/* See how many interrupts we need */
	if (sc->socid == MTK_SOC_MT7621)
		sc->sc_num_irq = 3;
	else {
		sc->sc_num_irq = 1;
		sc->pci_res[2] = sc->pci_res[3] = NULL;
		sc->pci_intrhand[1] = sc->pci_intrhand[2] = NULL;
	}

	/* Request our interrupts */	
	for (i = 1; i <= sc->sc_num_irq ; i++) {
		rid = i - 1;
		sc->pci_res[i] = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid,
				     RF_ACTIVE);
		if (sc->pci_res[i] == NULL) {
			device_printf(dev, "could not allocate interrupt "
			    "resource %d\n", rid);
			goto cleanup_res;
		}
	}

	/* Parse our PCI 'ranges' property */
	node = ofw_bus_get_node(dev);
	xref = OF_xref_from_node(node);
	if (mtk_pci_ranges(node, &io_space, &mem_space)) {
		device_printf(dev, "could not retrieve 'ranges' data\n");
		goto cleanup_res;
	}

	/* Memory, I/O and IRQ resource limits */
	sc->sc_io_base = io_space.base;
	sc->sc_io_size = io_space.len;
	sc->sc_mem_base = mem_space.base;
	sc->sc_mem_size = mem_space.len;
	sc->sc_irq_start = MTK_PCIE0_IRQ;
	sc->sc_irq_end = MTK_PCIE2_IRQ;