static int
cs4281_pci_attach(device_t dev)
{
    struct sc_info *sc;
    struct ac97_info *codec = NULL;
    char status[SND_STATUSLEN];

    sc = kmalloc(sizeof(*sc), M_DEVBUF, M_WAITOK | M_ZERO);
    sc->dev = dev;
    sc->type = pci_get_devid(dev);

    pci_enable_busmaster(dev);

    if (pci_get_powerstate(dev) != PCI_POWERSTATE_D0) {
	/* Reset the power state. */
	device_printf(dev, "chip is in D%d power mode "
		      "-- setting to D0\n", pci_get_powerstate(dev));

	pci_set_powerstate(dev, PCI_POWERSTATE_D0);
    }

    sc->regid   = PCIR_BAR(0);
    sc->regtype = SYS_RES_MEMORY;
    sc->reg = bus_alloc_resource(dev, sc->regtype, &sc->regid,
				 0, ~0, CS4281PCI_BA0_SIZE, RF_ACTIVE);
    if (!sc->reg) {
	sc->regtype = SYS_RES_IOPORT;
	sc->reg = bus_alloc_resource(dev, sc->regtype, &sc->regid,
				     0, ~0, CS4281PCI_BA0_SIZE, RF_ACTIVE);
	if (!sc->reg) {
	    device_printf(dev, "unable to allocate register space\n");
	    goto bad;
	}
    }
    sc->st = rman_get_bustag(sc->reg);
    sc->sh = rman_get_bushandle(sc->reg);

    sc->memid = PCIR_BAR(1);
    sc->mem = bus_alloc_resource(dev, SYS_RES_MEMORY, &sc->memid, 0,
				 ~0, CS4281PCI_BA1_SIZE, RF_ACTIVE);
    if (sc->mem == NULL) {
	device_printf(dev, "unable to allocate fifo space\n");
	goto bad;
    }

    sc->irqid = 0;
    sc->irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &sc->irqid,
				     RF_ACTIVE | RF_SHAREABLE);
    if (!sc->irq) {
	device_printf(dev, "unable to allocate interrupt\n");
	goto bad;
    }

    if (snd_setup_intr(dev, sc->irq, 0, cs4281_intr, sc, &sc->ih)) {
	device_printf(dev, "unable to setup interrupt\n");
	goto bad;
    }

    sc->bufsz = pcm_getbuffersize(dev, 4096, CS4281_DEFAULT_BUFSZ, 65536);

    if (bus_dma_tag_create(/*parent*/bus_get_dma_tag(dev), /*alignment*/2,
			   /*boundary*/0,
			   /*lowaddr*/BUS_SPACE_MAXADDR_32BIT,
			   /*highaddr*/BUS_SPACE_MAXADDR,
			   /*filter*/NULL, /*filterarg*/NULL,
			   /*maxsize*/sc->bufsz, /*nsegments*/1,
			   /*maxsegz*/0x3ffff,
			   /*flags*/0,
			   &sc->parent_dmat) != 0) {
	device_printf(dev, "unable to create dma tag\n");
	goto bad;
    }

    /* power up */
    cs4281_power(sc, 0);

    /* init chip */
    if (cs4281_init(sc) == -1) {
	device_printf(dev, "unable to initialize the card\n");
	goto bad;
    }

    /* create/init mixer */
    codec = AC97_CREATE(dev, sc, cs4281_ac97);
    if (codec == NULL)
        goto bad;

    mixer_init(dev, ac97_getmixerclass(), codec);

    if (pcm_register(dev, sc, 1, 1))
	goto bad;

    pcm_addchan(dev, PCMDIR_PLAY, &cs4281chan_class, sc);
    pcm_addchan(dev, PCMDIR_REC, &cs4281chan_class, sc);

    ksnprintf(status, SND_STATUSLEN, "at %s 0x%lx irq %ld %s",
	     (sc->regtype == SYS_RES_IOPORT)? "io" : "memory",
	     rman_get_start(sc->reg), rman_get_start(sc->irq),PCM_KLDSTRING(snd_cs4281));
    pcm_setstatus(dev, status);

//.........这里部分代码省略.........

static int
dotg_obio_attach(device_t dev)
{
	struct dwc_otg_softc *sc = device_get_softc(dev);
	uint32_t tmp;
	int err, rid;

	/* setup controller interface softc */

	/* initialise some bus fields */
	sc->sc_mode = DWC_MODE_HOST;
	sc->sc_bus.parent = dev;
	sc->sc_bus.devices = sc->sc_devices;
	sc->sc_bus.devices_max = DWC_OTG_MAX_DEVICES;
	sc->sc_bus.dma_bits = 32;

	/* get all DMA memory */
	if (usb_bus_mem_alloc_all(&sc->sc_bus,
	    USB_GET_DMA_TAG(dev), NULL)) {
		printf("No mem\n");
		return (ENOMEM);
	}
	rid = 0;
	sc->sc_io_res =
	    bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, RF_ACTIVE);
	if (!(sc->sc_io_res)) {
		printf("Can`t alloc MEM\n");
		goto error;
	}
	sc->sc_io_tag = rman_get_bustag(sc->sc_io_res);
	sc->sc_io_hdl = rman_get_bushandle(sc->sc_io_res);
	sc->sc_io_size = rman_get_size(sc->sc_io_res);

	rid = 0;
	sc->sc_irq_res = bus_alloc_resource_any(dev, SYS_RES_IRQ, 
	    &rid, RF_ACTIVE);
	if (!(sc->sc_irq_res)) {
		printf("Can`t alloc IRQ\n");
		goto error;
	}

	sc->sc_bus.bdev = device_add_child(dev, "usbus", -1);
	if (!(sc->sc_bus.bdev)) {
		printf("Can`t add usbus\n");
		goto error;
	}
	device_set_ivars(sc->sc_bus.bdev, &sc->sc_bus);

#if (__FreeBSD_version >= 700031)
	err = bus_setup_intr(dev, sc->sc_irq_res,
	    INTR_TYPE_TTY | INTR_MPSAFE, dwc_otg_filter_interrupt,
	    dwc_otg_interrupt, sc, &sc->sc_intr_hdl);
#else
	#error error
	err = bus_setup_intr(dev, sc->sc_irq_res,
	    INTR_TYPE_BIO | INTR_MPSAFE,(driver_intr_t*)dwc_otg_interrupt,
	    sc, &sc->sc_intr_hdl);
#endif
	if (err) {
		sc->sc_intr_hdl = NULL;
		printf("Can`t set IRQ handle\n");
		goto error;
	}

	/* Run clock for OTG core */
	rt305x_sysctl_set(SYSCTL_CLKCFG1, rt305x_sysctl_get(SYSCTL_CLKCFG1) | 
	    SYSCTL_CLKCFG1_OTG_CLK_EN);
	tmp = rt305x_sysctl_get(SYSCTL_RSTCTRL);
	rt305x_sysctl_set(SYSCTL_RSTCTRL, tmp | SYSCTL_RSTCTRL_OTG);
	DELAY(100);
	/*
	 * Docs say that RSTCTRL bits for RT305x are W1C, so there should
	 * be no need for the below, but who really knows?
	 */
//	rt305x_sysctl_set(SYSCTL_RSTCTRL, tmp & ~SYSCTL_RSTCTRL_OTG);
//	DELAY(100);

	err = dwc_otg_init(sc);
	if (err) printf("dotg_init fail\n");
	if (!err) {
		err = device_probe_and_attach(sc->sc_bus.bdev);
		if (err) printf("device_probe_and_attach fail %d\n", err);
	}
	if (err) {
		goto error;
	}
	return (0);

error:
	dotg_obio_detach(dev);
	return (ENXIO);
}

static int
ahc_isa_attach(device_t dev)
{
	struct	 aic7770_identity *entry;
	bus_space_tag_t	    tag;
	bus_space_handle_t  bsh;
	struct	  resource *regs;
	struct	  ahc_softc *ahc;
	char	 *name;
	int	  zero;
	int	  error;

	zero = 0;
	regs = bus_alloc_resource_any(dev, SYS_RES_IOPORT, &zero, RF_ACTIVE);
	if (regs == NULL)
		return (ENOMEM);

	tag = rman_get_bustag(regs);
	bsh = rman_get_bushandle(regs);
	entry = ahc_isa_find_device(tag, bsh);
	bus_release_resource(dev, SYS_RES_IOPORT, zero, regs);
	if (entry == NULL)
		return (ENODEV);

	/*
	 * Allocate a softc for this card and
	 * set it up for attachment by our
	 * common detect routine.
	 */
	name = malloc(strlen(device_get_nameunit(dev)) + 1, M_DEVBUF, M_NOWAIT);
	if (name == NULL)
		return (ENOMEM);
	strcpy(name, device_get_nameunit(dev));
	ahc = ahc_alloc(dev, name);
	if (ahc == NULL)
		return (ENOMEM);

	ahc_set_unit(ahc, device_get_unit(dev));

	/* Allocate a dmatag for our SCB DMA maps */
	error = aic_dma_tag_create(ahc, /*parent*/bus_get_dma_tag(dev),
				   /*alignment*/1, /*boundary*/0,
				   /*lowaddr*/BUS_SPACE_MAXADDR_32BIT,
				   /*highaddr*/BUS_SPACE_MAXADDR,
				   /*filter*/NULL, /*filterarg*/NULL,
				   /*maxsize*/BUS_SPACE_MAXSIZE_32BIT,
				   /*nsegments*/AHC_NSEG,
				   /*maxsegsz*/AHC_MAXTRANSFER_SIZE,
				   /*flags*/0,
				   &ahc->parent_dmat);

	if (error != 0) {
		printf("ahc_isa_attach: Could not allocate DMA tag "
		       "- error %d\n", error);
		ahc_free(ahc);
		return (ENOMEM);
	}
	ahc->dev_softc = dev;
	error = aic7770_config(ahc, entry, /*unused ioport arg*/0);
	if (error != 0) {
		ahc_free(ahc);
		return (error);
	}

	ahc_attach(ahc);
	return (0);
}

static int
xhci_pci_attach(device_t self)
{
	struct xhci_softc *sc = device_get_softc(self);
	int count, err, rid;
	uint8_t usedma32;

	rid = PCI_XHCI_CBMEM;
	sc->sc_io_res = bus_alloc_resource_any(self, SYS_RES_MEMORY, &rid,
	    RF_ACTIVE);
	if (!sc->sc_io_res) {
		device_printf(self, "Could not map memory\n");
		return (ENOMEM);
	}
	sc->sc_io_tag = rman_get_bustag(sc->sc_io_res);
	sc->sc_io_hdl = rman_get_bushandle(sc->sc_io_res);
	sc->sc_io_size = rman_get_size(sc->sc_io_res);

	switch (pci_get_devid(self)) {
	case 0x01941033:	/* NEC uPD720200 USB 3.0 controller */
		/* Don't use 64-bit DMA on these controllers. */
		usedma32 = 1;
		break;
	case 0x0f358086:	/* BayTrail */
	case 0x9c318086:	/* Panther Point */
	case 0x1e318086:	/* Panther Point */
	case 0x8c318086:	/* Lynx Point */
	case 0x8cb18086:	/* Wildcat Point */
		/*
		 * On Intel chipsets, reroute ports from EHCI to XHCI
		 * controller and use a different IMOD value.
		 */
		sc->sc_port_route = &xhci_pci_port_route;
		sc->sc_imod_default = XHCI_IMOD_DEFAULT_LP;
		/* FALLTHROUGH */
	default:
		usedma32 = 0;
		break;
	}

	if (xhci_init(sc, self, usedma32)) {
		device_printf(self, "Could not initialize softc\n");
		bus_release_resource(self, SYS_RES_MEMORY, PCI_XHCI_CBMEM,
		    sc->sc_io_res);
		return (ENXIO);
	}

	pci_enable_busmaster(self);

	usb_callout_init_mtx(&sc->sc_callout, &sc->sc_bus.bus_mtx, 0);

	rid = 0;
	if (xhci_use_msi) {
		count = 1;
		if (pci_alloc_msi(self, &count) == 0) {
			if (bootverbose)
				device_printf(self, "MSI enabled\n");
			rid = 1;
		}
	}
	sc->sc_irq_res = bus_alloc_resource_any(self, SYS_RES_IRQ, &rid,
	    RF_ACTIVE | (rid != 0 ? 0 : RF_SHAREABLE));
	if (sc->sc_irq_res == NULL) {
		pci_release_msi(self);
		device_printf(self, "Could not allocate IRQ\n");
		/* goto error; FALLTHROUGH - use polling */
	}
	sc->sc_bus.bdev = device_add_child(self, "usbus", -1);
	if (sc->sc_bus.bdev == NULL) {
		device_printf(self, "Could not add USB device\n");
		goto error;
	}
	device_set_ivars(sc->sc_bus.bdev, &sc->sc_bus);

	sprintf(sc->sc_vendor, "0x%04x", pci_get_vendor(self));

	if (sc->sc_irq_res != NULL) {
		err = bus_setup_intr(self, sc->sc_irq_res, INTR_TYPE_BIO | INTR_MPSAFE,
		    NULL, (driver_intr_t *)xhci_interrupt, sc, &sc->sc_intr_hdl);
		if (err != 0) {
			bus_release_resource(self, SYS_RES_IRQ,
			    rman_get_rid(sc->sc_irq_res), sc->sc_irq_res);
			sc->sc_irq_res = NULL;
			pci_release_msi(self);
			device_printf(self, "Could not setup IRQ, err=%d\n", err);
			sc->sc_intr_hdl = NULL;
		}
	}
	if (sc->sc_irq_res == NULL || sc->sc_intr_hdl == NULL) {
		if (xhci_use_polling() != 0) {
			device_printf(self, "Interrupt polling at %dHz\n", hz);
			USB_BUS_LOCK(&sc->sc_bus);
			xhci_interrupt_poll(sc);
			USB_BUS_UNLOCK(&sc->sc_bus);
		} else
			goto error;
	}

	xhci_pci_take_controller(self);

//.........这里部分代码省略.........

static int
ral_pci_attach(device_t dev)
{
	struct ral_pci_softc *psc = device_get_softc(dev);
	struct rt2560_softc *sc = &psc->u.sc_rt2560;
	int count, error, rid;

	pci_enable_busmaster(dev);

	switch (pci_get_device(dev)) {
	case 0x0201:
		psc->sc_opns = &ral_rt2560_opns;
		break;
	case 0x0301:
	case 0x0302:
	case 0x0401:
		psc->sc_opns = &ral_rt2661_opns;
		break;
	default:
		psc->sc_opns = &ral_rt2860_opns;
		break;
	}

	rid = PCIR_BAR(0);
	psc->mem = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid,
	    RF_ACTIVE);
	if (psc->mem == NULL) {
		device_printf(dev, "could not allocate memory resource\n");
		return ENXIO;
	}

	sc->sc_st = rman_get_bustag(psc->mem);
	sc->sc_sh = rman_get_bushandle(psc->mem);
	sc->sc_invalid = 1;
	
	rid = 0;
	if (ral_msi_disable == 0) {
		count = 1;
		if (pci_alloc_msi(dev, &count) == 0)
			rid = 1;
	}
	psc->irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid, RF_ACTIVE |
	    (rid != 0 ? 0 : RF_SHAREABLE));
	if (psc->irq == NULL) {
		device_printf(dev, "could not allocate interrupt resource\n");
		pci_release_msi(dev);
		bus_release_resource(dev, SYS_RES_MEMORY,
		    rman_get_rid(psc->mem), psc->mem);
		return ENXIO;
	}

	error = (*psc->sc_opns->attach)(dev, pci_get_device(dev));
	if (error != 0) {
		(void)ral_pci_detach(dev);
		return error;
	}

	/*
	 * Hook our interrupt after all initialization is complete.
	 */
	error = bus_setup_intr(dev, psc->irq, INTR_TYPE_NET | INTR_MPSAFE,
	    NULL, psc->sc_opns->intr, psc, &psc->sc_ih);
	if (error != 0) {
		device_printf(dev, "could not set up interrupt\n");
		(void)ral_pci_detach(dev);
		return error;
	}
	sc->sc_invalid = 0;
	
	return 0;
}

static int
acpi_ec_attach(device_t dev)
{
    struct acpi_ec_softc	*sc;
    struct acpi_ec_params	*params;
    ACPI_STATUS			Status;

    ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);

    /* Fetch/initialize softc (assumes softc is pre-zeroed). */
    sc = device_get_softc(dev);
    params = acpi_get_private(dev);
    sc->ec_dev = dev;
    sc->ec_handle = acpi_get_handle(dev);

    /* Retrieve previously probed values via device ivars. */
    sc->ec_glk = params->glk;
    sc->ec_gpebit = params->gpe_bit;
    sc->ec_gpehandle = params->gpe_handle;
    sc->ec_uid = params->uid;
    sc->ec_suspending = FALSE;
    acpi_set_private(dev, NULL);
    free(params, M_TEMP);

    /* Attach bus resources for data and command/status ports. */
    sc->ec_data_rid = 0;
    sc->ec_data_res = bus_alloc_resource_any(sc->ec_dev, SYS_RES_IOPORT,
			&sc->ec_data_rid, RF_ACTIVE);
    if (sc->ec_data_res == NULL) {
	device_printf(dev, "can't allocate data port\n");
	goto error;
    }
    sc->ec_data_tag = rman_get_bustag(sc->ec_data_res);
    sc->ec_data_handle = rman_get_bushandle(sc->ec_data_res);

    sc->ec_csr_rid = 1;
    sc->ec_csr_res = bus_alloc_resource_any(sc->ec_dev, SYS_RES_IOPORT,
			&sc->ec_csr_rid, RF_ACTIVE);
    if (sc->ec_csr_res == NULL) {
	device_printf(dev, "can't allocate command/status port\n");
	goto error;
    }
    sc->ec_csr_tag = rman_get_bustag(sc->ec_csr_res);
    sc->ec_csr_handle = rman_get_bushandle(sc->ec_csr_res);

    /*
     * Install a handler for this EC's GPE bit.  We want edge-triggered
     * behavior.
     */
    ACPI_DEBUG_PRINT((ACPI_DB_RESOURCES, "attaching GPE handler\n"));
    Status = AcpiInstallGpeHandler(sc->ec_gpehandle, sc->ec_gpebit,
		ACPI_GPE_EDGE_TRIGGERED, &EcGpeHandler, sc);
    if (ACPI_FAILURE(Status)) {
	device_printf(dev, "can't install GPE handler for %s - %s\n",
		      acpi_name(sc->ec_handle), AcpiFormatException(Status));
	goto error;
    }

    /*
     * Install address space handler
     */
    ACPI_DEBUG_PRINT((ACPI_DB_RESOURCES, "attaching address space handler\n"));
    Status = AcpiInstallAddressSpaceHandler(sc->ec_handle, ACPI_ADR_SPACE_EC,
		&EcSpaceHandler, &EcSpaceSetup, sc);
    if (ACPI_FAILURE(Status)) {
	device_printf(dev, "can't install address space handler for %s - %s\n",
		      acpi_name(sc->ec_handle), AcpiFormatException(Status));
	goto error;
    }

    /* Enable runtime GPEs for the handler. */
    Status = AcpiSetGpeType(sc->ec_gpehandle, sc->ec_gpebit,
			    ACPI_GPE_TYPE_RUNTIME);
    if (ACPI_FAILURE(Status)) {
	device_printf(dev, "AcpiSetGpeType failed: %s\n",
		      AcpiFormatException(Status));
	goto error;
    }
    Status = AcpiEnableGpe(sc->ec_gpehandle, sc->ec_gpebit, ACPI_NOT_ISR);
    if (ACPI_FAILURE(Status)) {
	device_printf(dev, "AcpiEnableGpe failed: %s\n",
		      AcpiFormatException(Status));
	goto error;
    }

    ACPI_DEBUG_PRINT((ACPI_DB_RESOURCES, "acpi_ec_attach complete\n"));
    return (0);

error:
    AcpiRemoveGpeHandler(sc->ec_gpehandle, sc->ec_gpebit, &EcGpeHandler);
    AcpiRemoveAddressSpaceHandler(sc->ec_handle, ACPI_ADR_SPACE_EC,
	EcSpaceHandler);
    if (sc->ec_csr_res)
	bus_release_resource(sc->ec_dev, SYS_RES_IOPORT, sc->ec_csr_rid,
			     sc->ec_csr_res);
    if (sc->ec_data_res)
	bus_release_resource(sc->ec_dev, SYS_RES_IOPORT, sc->ec_data_rid,
			     sc->ec_data_res);
    return (ENXIO);
}

static int
iir_pci_attach(device_t dev)
{
    struct gdt_softc    *gdt;
    struct resource     *io = NULL, *irq = NULL;
    int                 retries, rid, error = 0;
    void                *ih;
    u_int8_t            protocol;  
 
    /* map DPMEM */
    rid = PCI_DPMEM;
    io = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, RF_ACTIVE);
    if (io == NULL) {
        device_printf(dev, "can't allocate register resources\n");
        error = ENOMEM;
        goto err;
    }

    /* get IRQ */
    rid = 0;
    irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid,
                                 RF_ACTIVE | RF_SHAREABLE);
    if (irq == NULL) {
        device_printf(dev, "can't find IRQ value\n");
        error = ENOMEM;
        goto err;
    }

    gdt = device_get_softc(dev);
    gdt->sc_devnode = dev;
    gdt->sc_init_level = 0;
    gdt->sc_dpmemt = rman_get_bustag(io);
    gdt->sc_dpmemh = rman_get_bushandle(io);
    gdt->sc_dpmembase = rman_get_start(io);
    gdt->sc_hanum = device_get_unit(dev);
    gdt->sc_bus = pci_get_bus(dev);
    gdt->sc_slot = pci_get_slot(dev);
    gdt->sc_vendor = pci_get_vendor(dev);
    gdt->sc_device = pci_get_device(dev);
    gdt->sc_subdevice = pci_get_subdevice(dev);
    gdt->sc_class = GDT_MPR;
/* no FC ctr.
    if (gdt->sc_device >= GDT_PCI_PRODUCT_FC)
        gdt->sc_class |= GDT_FC;
*/

    /* initialize RP controller */
    /* check and reset interface area */
    bus_space_write_4(gdt->sc_dpmemt, gdt->sc_dpmemh, GDT_MPR_IC,
                      htole32(GDT_MPR_MAGIC));
    if (bus_space_read_4(gdt->sc_dpmemt, gdt->sc_dpmemh, GDT_MPR_IC) !=
        htole32(GDT_MPR_MAGIC)) {
        printf("cannot access DPMEM at 0x%jx (shadowed?)\n",
               (uintmax_t)gdt->sc_dpmembase);
        error = ENXIO;
        goto err;
    }
    bus_space_set_region_4(gdt->sc_dpmemt, gdt->sc_dpmemh, GDT_I960_SZ, htole32(0),
                           GDT_MPR_SZ >> 2);

    /* Disable everything */
    bus_space_write_1(gdt->sc_dpmemt, gdt->sc_dpmemh, GDT_EDOOR_EN,
                      bus_space_read_1(gdt->sc_dpmemt, gdt->sc_dpmemh, 
                                       GDT_EDOOR_EN) | 4);
    bus_space_write_1(gdt->sc_dpmemt, gdt->sc_dpmemh, GDT_MPR_EDOOR, 0xff);
    bus_space_write_1(gdt->sc_dpmemt, gdt->sc_dpmemh, GDT_MPR_IC + GDT_S_STATUS,
                      0);
    bus_space_write_1(gdt->sc_dpmemt, gdt->sc_dpmemh, GDT_MPR_IC + GDT_CMD_INDEX,
                      0);

    bus_space_write_4(gdt->sc_dpmemt, gdt->sc_dpmemh, GDT_MPR_IC + GDT_S_INFO,
                      htole32(gdt->sc_dpmembase));
    bus_space_write_1(gdt->sc_dpmemt, gdt->sc_dpmemh, GDT_MPR_IC + GDT_S_CMD_INDX,
                      0xff);
    bus_space_write_1(gdt->sc_dpmemt, gdt->sc_dpmemh, GDT_MPR_LDOOR, 1);

    DELAY(20);
    retries = GDT_RETRIES;
    while (bus_space_read_1(gdt->sc_dpmemt, gdt->sc_dpmemh,
                            GDT_MPR_IC + GDT_S_STATUS) != 0xff) {
        if (--retries == 0) {
            printf("DEINIT failed\n");
            error = ENXIO;
            goto err;
        }
        DELAY(1);
    }

    protocol = (uint8_t)le32toh(bus_space_read_4(gdt->sc_dpmemt, gdt->sc_dpmemh,
                                                  GDT_MPR_IC + GDT_S_INFO));
    bus_space_write_1(gdt->sc_dpmemt, gdt->sc_dpmemh, GDT_MPR_IC + GDT_S_STATUS,
                      0);
    if (protocol != GDT_PROTOCOL_VERSION) {
        printf("unsupported protocol %d\n", protocol);
        error = ENXIO;
        goto err;
    }
    
    /* special commnd to controller BIOS */
    bus_space_write_4(gdt->sc_dpmemt, gdt->sc_dpmemh, GDT_MPR_IC + GDT_S_INFO,
//.........这里部分代码省略.........

/*
 * Allocate resources for our device, set up the bus interface.
 */
static int
aac_pci_attach(device_t dev)
{
	struct aac_softc *sc;
	const struct aac_ident *id;
	int count, error, reg, rid;

	fwprintf(NULL, HBA_FLAGS_DBG_FUNCTION_ENTRY_B, "");

	/*
	 * Initialise softc.
	 */
	sc = device_get_softc(dev);
	sc->aac_dev = dev;

	/* assume failure is 'not configured' */
	error = ENXIO;

	/*
	 * Verify that the adapter is correctly set up in PCI space.
	 */
	pci_enable_busmaster(dev);
	if (!(pci_read_config(dev, PCIR_COMMAND, 2) & PCIM_CMD_BUSMASTEREN)) {
		device_printf(dev, "can't enable bus-master feature\n");
		goto out;
	}

	/*
	 * Allocate the PCI register window(s).
	 */
	rid = PCIR_BAR(0);
	if ((sc->aac_regs_res0 = bus_alloc_resource_any(dev,
	    SYS_RES_MEMORY, &rid, RF_ACTIVE)) == NULL) {
		device_printf(dev, "can't allocate register window 0\n");
		goto out;
	}
	sc->aac_btag0 = rman_get_bustag(sc->aac_regs_res0);
	sc->aac_bhandle0 = rman_get_bushandle(sc->aac_regs_res0);

	if (sc->aac_hwif == AAC_HWIF_NARK) {
		rid = PCIR_BAR(1);
		if ((sc->aac_regs_res1 = bus_alloc_resource_any(dev,
		    SYS_RES_MEMORY, &rid, RF_ACTIVE)) == NULL) {
			device_printf(dev,
			    "can't allocate register window 1\n");
			goto out;
		}
		sc->aac_btag1 = rman_get_bustag(sc->aac_regs_res1);
		sc->aac_bhandle1 = rman_get_bushandle(sc->aac_regs_res1);
	} else {
		sc->aac_regs_res1 = sc->aac_regs_res0;
		sc->aac_btag1 = sc->aac_btag0;
		sc->aac_bhandle1 = sc->aac_bhandle0;
	}

	/*
	 * Allocate the interrupt.
	 */
	rid = 0;
	count = 0;
	if (aac_enable_msi != 0 && pci_find_cap(dev, PCIY_MSI, &reg) == 0) {
		count = pci_msi_count(dev);
		if (count > 1)
			count = 1;
		else
			count = 0;
		if (count == 1 && pci_alloc_msi(dev, &count) == 0)
			rid = 1;
	}
	if ((sc->aac_irq = bus_alloc_resource_any(sc->aac_dev, SYS_RES_IRQ,
	    &rid, RF_ACTIVE | (count != 0 ? 0 : RF_SHAREABLE))) == NULL) {
		device_printf(dev, "can't allocate interrupt\n");
		goto out;
	}

	/*
	 * Allocate the parent bus DMA tag appropriate for our PCI interface.
	 *
	 * Note that some of these controllers are 64-bit capable.
	 */
	if (bus_dma_tag_create(bus_get_dma_tag(dev),	/* parent */
			       PAGE_SIZE, 0,		/* algnmnt, boundary */
			       BUS_SPACE_MAXADDR,	/* lowaddr */
			       BUS_SPACE_MAXADDR, 	/* highaddr */
			       NULL, NULL, 		/* filter, filterarg */
			       BUS_SPACE_MAXSIZE_32BIT,	/* maxsize */
			       BUS_SPACE_UNRESTRICTED,	/* nsegments */
			       BUS_SPACE_MAXSIZE_32BIT,	/* maxsegsize */
			       0,			/* flags */
			       NULL, NULL,		/* No locking needed */
			       &sc->aac_parent_dmat)) {
		device_printf(dev, "can't allocate parent DMA tag\n");
		goto out;
	}

	/*
	 * Detect the hardware interface version, set up the bus interface
//.........这里部分代码省略.........

static void
pcib_mbus_identify(driver_t *driver, device_t parent)
{
	const struct obio_pci *info = mv_pci_info;
	struct pcib_mbus_softc *sc;
	uint32_t control;

	while (info->op_base) {
		sc = malloc(driver->size, M_DEVBUF, M_NOWAIT | M_ZERO);
		if (sc == NULL) {
			device_printf(parent, "Could not allocate pcib "
			    "memory\n");
			break;
		}
		sc->sc_info = info++;

		/*
		 * PCI bridge objects are instantiated immediately. PCI-Express
		 * bridges require more complicated handling depending on
		 * platform configuration.
		 */
		if (sc->sc_info->op_type == MV_TYPE_PCI) {
			pcib_mbus_add_child(driver, parent, sc);
			continue;
		}

		/*
		 * Read link configuration
		 */
		sc->sc_rid = 0;
		sc->sc_res = BUS_ALLOC_RESOURCE(parent, parent, SYS_RES_MEMORY,
		    &sc->sc_rid, sc->sc_info->op_base, sc->sc_info->op_base +
		    sc->sc_info->op_size - 1, sc->sc_info->op_size,
		    RF_ACTIVE);
		if (sc->sc_res == NULL) {
			device_printf(parent, "Could not map pcib memory\n");
			break;
		}

		sc->sc_bst = rman_get_bustag(sc->sc_res);
		sc->sc_bsh = rman_get_bushandle(sc->sc_res);

		control = bus_space_read_4(sc->sc_bst, sc->sc_bsh,
		    PCIE_REG_CONTROL);

		BUS_RELEASE_RESOURCE(parent, parent, SYS_RES_MEMORY, sc->sc_rid,
		    sc->sc_res);

		/*
		 * If this PCI-E port (controller) is configured (by the
		 * underlying firmware) with lane width other than 1x, there
		 * are auxiliary resources defined for aggregating more width
		 * on our lane. Skip all such entries as they are not
		 * standalone ports and must not have a device object
		 * instantiated.
		 */
		if ((control & PCIE_CTRL_LINK1X) == 0)
			while (info->op_base &&
			    info->op_type == MV_TYPE_PCIE_AGGR_LANE)
				info++;

		pcib_mbus_add_child(driver, parent, sc);
	}
}

static int
acpi_ec_attach(device_t dev)
{
    struct acpi_ec_softc	*sc;
    ACPI_STATUS			Status;
    int errval = 0;

    ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);

    /*
     * Fetch/initialise softc
     */
    sc = device_get_softc(dev);
    bzero(sc, sizeof(*sc));
    sc->ec_dev = dev;
    sc->ec_handle = acpi_get_handle(dev);

    /* 
     * Attach bus resources
     */
    sc->ec_data_rid = 0;
    if ((sc->ec_data_res = bus_alloc_resource(sc->ec_dev, SYS_RES_IOPORT, &sc->ec_data_rid,
					      0, ~0, 1, RF_ACTIVE)) == NULL) {
	device_printf(dev, "can't allocate data port\n");
	errval = ENXIO;
	goto out;
    }
    sc->ec_data_tag = rman_get_bustag(sc->ec_data_res);
    sc->ec_data_handle = rman_get_bushandle(sc->ec_data_res);

    sc->ec_csr_rid = 1;
    if ((sc->ec_csr_res = bus_alloc_resource(sc->ec_dev, SYS_RES_IOPORT, &sc->ec_csr_rid,
					     0, ~0, 1, RF_ACTIVE)) == NULL) {
	device_printf(dev, "can't allocate command/status port\n");
	errval = ENXIO;
	goto out;
    }
    sc->ec_csr_tag = rman_get_bustag(sc->ec_csr_res);
    sc->ec_csr_handle = rman_get_bushandle(sc->ec_csr_res);

    /*
     * Install GPE handler
     *
     * Evaluate the _GPE method to find the GPE bit used by the EC to signal
     * status (SCI).
     */
    ACPI_DEBUG_PRINT((ACPI_DB_RESOURCES, "attaching GPE\n"));
    if (ACPI_FAILURE(Status = acpi_EvaluateInteger(sc->ec_handle, "_GPE", &sc->ec_gpebit))) {
	device_printf(dev, "can't evaluate _GPE - %s\n", AcpiFormatException(Status));
	errval =ENXIO;
	goto out;
    }

    /*
     * Install a handler for this EC's GPE bit.  Note that EC SCIs are 
     * treated as both edge- and level-triggered interrupts; in other words
     * we clear the status bit immediately after getting an EC-SCI, then
     * again after we're done processing the event.  This guarantees that
     * events we cause while performing a transaction (e.g. IBE/OBF) get 
     * cleared before re-enabling the GPE.
     */
    if (ACPI_FAILURE(Status = AcpiInstallGpeHandler(sc->ec_gpebit,
						    ACPI_EVENT_LEVEL_TRIGGERED |
						    ACPI_EVENT_EDGE_TRIGGERED, 
						    EcGpeHandler, sc))) {
	device_printf(dev, "can't install GPE handler for %s - %s\n",
		      acpi_name(sc->ec_handle), AcpiFormatException(Status));
	errval = ENXIO;
	goto out;
    }

    /* 
     * Install address space handler
     */
    ACPI_DEBUG_PRINT((ACPI_DB_RESOURCES, "attaching address space handler\n"));
    if (ACPI_FAILURE(Status = AcpiInstallAddressSpaceHandler(sc->ec_handle,
							     ACPI_ADR_SPACE_EC,
							     EcSpaceHandler,
							     EcSpaceSetup,
							     sc))) {
	device_printf(dev, "can't install address space handler for %s - %s\n",
		      acpi_name(sc->ec_handle), AcpiFormatException(Status));
	panic("very suck");
	errval = ENXIO;
	goto out;
    }
    ACPI_DEBUG_PRINT((ACPI_DB_RESOURCES, "attach complete\n"));
    return_VALUE(0);
 out:
    if(sc->ec_csr_res)
	bus_release_resource(sc->ec_dev, SYS_RES_IOPORT, sc->ec_csr_rid, 
			     sc->ec_csr_res);
    if(sc->ec_data_res)
        bus_release_resource(sc->ec_dev, SYS_RES_IOPORT, sc->ec_data_rid,
			     sc->ec_data_res);
    return_VALUE(errval);
}

static int
imx_gpt_attach(device_t dev)
{
	struct imx_gpt_softc *sc;
	int ctlreg, err;
	uint32_t basefreq, prescale;

	sc = device_get_softc(dev);

	if (bus_alloc_resources(dev, imx_gpt_spec, sc->res)) {
		device_printf(dev, "could not allocate resources\n");
		return (ENXIO);
	}

	sc->sc_dev = dev;
	sc->sc_iot = rman_get_bustag(sc->res[0]);
	sc->sc_ioh = rman_get_bushandle(sc->res[0]);

	/*
	 * For now, just automatically choose a good clock for the hardware
	 * we're running on.  Eventually we could allow selection from the fdt;
	 * the code in this driver will cope with any clock frequency.
	 */
	sc->sc_clksrc = GPT_CR_CLKSRC_IPG;

	ctlreg = 0;

	switch (sc->sc_clksrc) {
	case GPT_CR_CLKSRC_32K:
		basefreq = 32768;
		break;
	case GPT_CR_CLKSRC_IPG:
		basefreq = imx_ccm_ipg_hz();
		break;
	case GPT_CR_CLKSRC_IPG_HIGH:
		basefreq = imx_ccm_ipg_hz() * 2;
		break;
	case GPT_CR_CLKSRC_24M:
		ctlreg |= GPT_CR_24MEN;
		basefreq = 24000000;
		break;
	case GPT_CR_CLKSRC_NONE:/* Can't run without a clock. */
	case GPT_CR_CLKSRC_EXT:	/* No way to get the freq of an ext clock. */
	default:
		device_printf(dev, "Unsupported clock source '%d'\n", 
		    sc->sc_clksrc);
		return (EINVAL);
	}

	/*
	 * The following setup sequence is from the I.MX6 reference manual,
	 * "Selecting the clock source".  First, disable the clock and
	 * interrupts.  This also clears input and output mode bits and in
	 * general completes several of the early steps in the procedure.
	 */
	WRITE4(sc, IMX_GPT_CR, 0);
	WRITE4(sc, IMX_GPT_IR, 0);

	/* Choose the clock and the power-saving behaviors. */
	ctlreg |=
	    sc->sc_clksrc |	/* Use selected clock */
	    GPT_CR_FRR |	/* Just count (FreeRunner mode) */
	    GPT_CR_STOPEN |	/* Run in STOP mode */
	    GPT_CR_DOZEEN |	/* Run in DOZE mode */
	    GPT_CR_WAITEN |	/* Run in WAIT mode */
	    GPT_CR_DBGEN;	/* Run in DEBUG mode */
	WRITE4(sc, IMX_GPT_CR, ctlreg);

	/*
	 * The datasheet says to do the software reset after choosing the clock
	 * source.  It says nothing about needing to wait for the reset to
	 * complete, but the register description does document the fact that
	 * the reset isn't complete until the SWR bit reads 0, so let's be safe.
	 * The reset also clears all registers except for a few of the bits in
	 * CR, but we'll rewrite all the CR bits when we start the counter.
	 */
	WRITE4(sc, IMX_GPT_CR, ctlreg | GPT_CR_SWR);
	while (READ4(sc, IMX_GPT_CR) & GPT_CR_SWR)
		continue;

	/* Set a prescaler value that gets us near the target frequency. */
	if (basefreq < TARGET_FREQUENCY) {
		prescale = 0;
		sc->clkfreq = basefreq;
	} else {
		prescale = basefreq / TARGET_FREQUENCY;
		sc->clkfreq = basefreq / prescale;
		prescale -= 1; /* 1..n range is 0..n-1 in hardware. */
	}
	WRITE4(sc, IMX_GPT_PR, prescale);

	/* Clear the status register. */
	WRITE4(sc, IMX_GPT_SR, GPT_IR_ALL);

	/* Start the counter. */
	WRITE4(sc, IMX_GPT_CR, ctlreg | GPT_CR_EN);

	if (bootverbose)
		device_printf(dev, "Running on %dKHz clock, base freq %uHz CR=0x%08x, PR=0x%08x\n",
		    sc->clkfreq / 1000, basefreq, READ4(sc, IMX_GPT_CR), READ4(sc, IMX_GPT_PR));
//.........这里部分代码省略.........

static int
cbb_pci_attach(device_t brdev)
{
    static int curr_bus_number = 2; /* XXX EVILE BAD (see below) */
    struct cbb_softc *sc = (struct cbb_softc *)device_get_softc(brdev);
    struct sysctl_ctx_list *sctx;
    struct sysctl_oid *soid;
    int rid;
    device_t parent;
    uint32_t pribus;

    parent = device_get_parent(brdev);
    mtx_init(&sc->mtx, device_get_nameunit(brdev), "cbb", MTX_DEF);
    sc->chipset = cbb_chipset(pci_get_devid(brdev), NULL);
    sc->dev = brdev;
    sc->cbdev = NULL;
    sc->exca[0].pccarddev = NULL;
    sc->domain = pci_get_domain(brdev);
    sc->secbus = pci_read_config(brdev, PCIR_SECBUS_2, 1);
    sc->subbus = pci_read_config(brdev, PCIR_SUBBUS_2, 1);
    sc->pribus = pcib_get_bus(parent);
    SLIST_INIT(&sc->rl);
    cbb_powerstate_d0(brdev);

    rid = CBBR_SOCKBASE;
    sc->base_res = bus_alloc_resource_any(brdev, SYS_RES_MEMORY, &rid,
                                          RF_ACTIVE);
    if (!sc->base_res) {
        device_printf(brdev, "Could not map register memory\n");
        mtx_destroy(&sc->mtx);
        return (ENOMEM);
    } else {
        DEVPRINTF((brdev, "Found memory at %08lx\n",
                   rman_get_start(sc->base_res)));
    }

    sc->bst = rman_get_bustag(sc->base_res);
    sc->bsh = rman_get_bushandle(sc->base_res);
    exca_init(&sc->exca[0], brdev, sc->bst, sc->bsh, CBB_EXCA_OFFSET);
    sc->exca[0].flags |= EXCA_HAS_MEMREG_WIN;
    sc->exca[0].chipset = EXCA_CARDBUS;
    sc->chipinit = cbb_chipinit;
    sc->chipinit(sc);

    /*Sysctls*/
    sctx = device_get_sysctl_ctx(brdev);
    soid = device_get_sysctl_tree(brdev);
    SYSCTL_ADD_UINT(sctx, SYSCTL_CHILDREN(soid), OID_AUTO, "domain",
                    CTLFLAG_RD, &sc->domain, 0, "Domain number");
    SYSCTL_ADD_UINT(sctx, SYSCTL_CHILDREN(soid), OID_AUTO, "pribus",
                    CTLFLAG_RD, &sc->pribus, 0, "Primary bus number");
    SYSCTL_ADD_UINT(sctx, SYSCTL_CHILDREN(soid), OID_AUTO, "secbus",
                    CTLFLAG_RD, &sc->secbus, 0, "Secondary bus number");
    SYSCTL_ADD_UINT(sctx, SYSCTL_CHILDREN(soid), OID_AUTO, "subbus",
                    CTLFLAG_RD, &sc->subbus, 0, "Subordinate bus number");
#if 0
    SYSCTL_ADD_UINT(sctx, SYSCTL_CHILDREN(soid), OID_AUTO, "memory",
                    CTLFLAG_RD, &sc->subbus, 0, "Memory window open");
    SYSCTL_ADD_UINT(sctx, SYSCTL_CHILDREN(soid), OID_AUTO, "premem",
                    CTLFLAG_RD, &sc->subbus, 0, "Prefetch memroy window open");
    SYSCTL_ADD_UINT(sctx, SYSCTL_CHILDREN(soid), OID_AUTO, "io1",
                    CTLFLAG_RD, &sc->subbus, 0, "io range 1 open");
    SYSCTL_ADD_UINT(sctx, SYSCTL_CHILDREN(soid), OID_AUTO, "io2",
                    CTLFLAG_RD, &sc->subbus, 0, "io range 2 open");
#endif

    /*
     * This is a gross hack.  We should be scanning the entire pci
     * tree, assigning bus numbers in a way such that we (1) can
     * reserve 1 extra bus just in case and (2) all sub busses
     * are in an appropriate range.
     */
    DEVPRINTF((brdev, "Secondary bus is %d\n", sc->secbus));
    pribus = pci_read_config(brdev, PCIR_PRIBUS_2, 1);
    if (sc->secbus == 0 || sc->pribus != pribus) {
        if (curr_bus_number <= sc->pribus)
            curr_bus_number = sc->pribus + 1;
        if (pribus != sc->pribus) {
            DEVPRINTF((brdev, "Setting primary bus to %d\n",
                       sc->pribus));
            pci_write_config(brdev, PCIR_PRIBUS_2, sc->pribus, 1);
        }
        sc->secbus = curr_bus_number++;
        sc->subbus = curr_bus_number++;
        DEVPRINTF((brdev, "Secondary bus set to %d subbus %d\n",
                   sc->secbus, sc->subbus));
        pci_write_config(brdev, PCIR_SECBUS_2, sc->secbus, 1);
        pci_write_config(brdev, PCIR_SUBBUS_2, sc->subbus, 1);
    }

    /* attach children */
    sc->cbdev = device_add_child(brdev, "cardbus", -1);
    if (sc->cbdev == NULL)
        DEVPRINTF((brdev, "WARNING: cannot add cardbus bus.\n"));
    else if (device_probe_and_attach(sc->cbdev) != 0)
        DEVPRINTF((brdev, "WARNING: cannot attach cardbus bus!\n"));

    sc->exca[0].pccarddev = device_add_child(brdev, "pccard", -1);
    if (sc->exca[0].pccarddev == NULL)
        DEVPRINTF((brdev, "WARNING: cannot add pccard bus.\n"));
//.........这里部分代码省略.........

static void
port_wr(struct resource *r, int i, unsigned char v)
{
	bus_space_write_1(rman_get_bustag(r), rman_get_bushandle(r), i, v);
}

static int
kr_attach(device_t dev)
{
	uint8_t			eaddr[ETHER_ADDR_LEN];
	struct ifnet		*ifp;
	struct kr_softc		*sc;
	int			error = 0, rid;
	int			unit;

	sc = device_get_softc(dev);
	unit = device_get_unit(dev);
	sc->kr_dev = dev;

	mtx_init(&sc->kr_mtx, device_get_nameunit(dev), MTX_NETWORK_LOCK,
	    MTX_DEF);
	callout_init_mtx(&sc->kr_stat_callout, &sc->kr_mtx, 0);
	TASK_INIT(&sc->kr_link_task, 0, kr_link_task, sc);
	pci_enable_busmaster(dev);

	/* Map control/status registers. */
	sc->kr_rid = 0;
	sc->kr_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &sc->kr_rid, 
	    RF_ACTIVE);

	if (sc->kr_res == NULL) {
		device_printf(dev, "couldn't map memory\n");
		error = ENXIO;
		goto fail;
	}

	sc->kr_btag = rman_get_bustag(sc->kr_res);
	sc->kr_bhandle = rman_get_bushandle(sc->kr_res);

	/* Allocate interrupts */
	rid = 0;
	sc->kr_rx_irq = bus_alloc_resource(dev, SYS_RES_IRQ, &rid, KR_RX_IRQ,
	    KR_RX_IRQ, 1, RF_SHAREABLE | RF_ACTIVE);

	if (sc->kr_rx_irq == NULL) {
		device_printf(dev, "couldn't map rx interrupt\n");
		error = ENXIO;
		goto fail;
	}

	rid = 0;
	sc->kr_tx_irq = bus_alloc_resource(dev, SYS_RES_IRQ, &rid, KR_TX_IRQ,
	    KR_TX_IRQ, 1, RF_SHAREABLE | RF_ACTIVE);

	if (sc->kr_tx_irq == NULL) {
		device_printf(dev, "couldn't map tx interrupt\n");
		error = ENXIO;
		goto fail;
	}

	rid = 0;
	sc->kr_rx_und_irq = bus_alloc_resource(dev, SYS_RES_IRQ, &rid, 
	    KR_RX_UND_IRQ, KR_RX_UND_IRQ, 1, RF_SHAREABLE | RF_ACTIVE);

	if (sc->kr_rx_und_irq == NULL) {
		device_printf(dev, "couldn't map rx underrun interrupt\n");
		error = ENXIO;
		goto fail;
	}

	rid = 0;
	sc->kr_tx_ovr_irq = bus_alloc_resource(dev, SYS_RES_IRQ, &rid, 
	    KR_TX_OVR_IRQ, KR_TX_OVR_IRQ, 1, RF_SHAREABLE | RF_ACTIVE);

	if (sc->kr_tx_ovr_irq == NULL) {
		device_printf(dev, "couldn't map tx overrun interrupt\n");
		error = ENXIO;
		goto fail;
	}

	/* Allocate ifnet structure. */
	ifp = sc->kr_ifp = if_alloc(IFT_ETHER);

	if (ifp == NULL) {
		device_printf(dev, "couldn't allocate ifnet structure\n");
		error = ENOSPC;
		goto fail;
	}
	ifp->if_softc = sc;
	if_initname(ifp, device_get_name(dev), device_get_unit(dev));
	ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST;
	ifp->if_ioctl = kr_ioctl;
	ifp->if_start = kr_start;
	ifp->if_init = kr_init;

	/* XXX: add real size */
	IFQ_SET_MAXLEN(&ifp->if_snd, 9);
	ifp->if_snd.ifq_maxlen = 9;
	IFQ_SET_READY(&ifp->if_snd);

	ifp->if_capenable = ifp->if_capabilities;

	eaddr[0] = 0x00;
	eaddr[1] = 0x0C;
	eaddr[2] = 0x42;
	eaddr[3] = 0x09;
//.........这里部分代码省略.........

static int
port_rd(struct resource *r, int i)
{
	return bus_space_read_1(rman_get_bustag(r), rman_get_bushandle(r), i);
}

/*
 * On standard ISA, we don't just use an 8 port range
 * (e.g. 0x3f0-0x3f7) since that covers an IDE control register at
 * 0x3f6.  So, on older hardware, we use 0x3f0-0x3f5 and 0x3f7.
 * However, some BIOSs omit the control port, while others start at
 * 0x3f2.  Of the latter, sometimes we have two resources, other times
 * we have one.  We have to deal with the following cases:
 *
 * 1:	0x3f0-0x3f5			# very rare
 * 2:	0x3f0				# hints -> 0x3f0-0x3f5,0x3f7
 * 3:	0x3f0-0x3f5,0x3f7		# Most common
 * 4:	0x3f2-0x3f5,0x3f7		# Second most common
 * 5:	0x3f2-0x3f5			# implies 0x3f7 too.
 * 6:	0x3f2-0x3f3,0x3f4-0x3f5,0x3f7	# becoming common
 * 7:	0x3f2-0x3f3,0x3f4-0x3f5		# rare
 * 8:	0x3f0-0x3f1,0x3f2-0x3f3,0x3f4-0x3f5,0x3f7
 * 9:	0x3f0-0x3f3,0x3f4-0x3f5,0x3f7
 *
 * The following code is generic for any value of 0x3fx.  It is also
 * generic for all the above cases, as well as cases where things are
 * even weirder.
 */
int
fdc_isa_alloc_resources(device_t dev, struct fdc_data *fdc)
{
	struct resource *res;
	int i, j, rid, newrid, nport;
	u_long port;

	fdc->fdc_dev = dev;
	rid = 0;
	for (i = 0; i < FDC_MAXREG; i++)
		fdc->resio[i] = NULL;

	nport = isa_get_logicalid(dev) ? 1 : 6;
	for (rid = 0; ; rid++) {
		newrid = rid;
		res = bus_alloc_resource(dev, SYS_RES_IOPORT, &newrid,
		    0ul, ~0ul, rid == 0 ? nport : 1, RF_ACTIVE);
		if (res == NULL)
			break;
		/*
		 * Mask off the upper bits of the register, and sanity
		 * check resource ranges.
		 */
		i = rman_get_start(res) & 0x7;
		if (i + rman_get_size(res) - 1 > FDC_MAXREG) {
			bus_release_resource(dev, SYS_RES_IOPORT, newrid, res);
			return (ENXIO);
		}
		for (j = 0; j < rman_get_size(res); j++) {
			fdc->resio[i + j] = res;
			fdc->ridio[i + j] = newrid;
			fdc->ioff[i + j] = j;
			fdc->ioh[i + j] = rman_get_bushandle(res);
		}
	}
	if (fdc->resio[2] == NULL) {
		device_printf(dev, "No FDOUT register!\n");
		return (ENXIO);
	}
	fdc->iot = rman_get_bustag(fdc->resio[2]);
	if (fdc->resio[7] == NULL) {
		port = (rman_get_start(fdc->resio[2]) & ~0x7) + 7;
		newrid = rid;
		res = bus_alloc_resource(dev, SYS_RES_IOPORT, &newrid, port,
		    port, 1, RF_ACTIVE);
		if (res == NULL) {
			device_printf(dev, "Faking up FDCTL\n");
			fdc->resio[7] = fdc->resio[2];
			fdc->ridio[7] = fdc->ridio[2];
			fdc->ioff[7] = fdc->ioff[2] + 5;
			fdc->ioh[7] = fdc->ioh[2];
		} else {
			fdc->resio[7] = res;
			fdc->ridio[7] = newrid;
			fdc->ioff[7] = rman_get_start(res) & 7;
			fdc->ioh[7] = rman_get_bushandle(res);
		}
	}

	fdc->res_irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &fdc->rid_irq,
	    RF_ACTIVE | RF_SHAREABLE);
	if (fdc->res_irq == NULL) {
		device_printf(dev, "cannot reserve interrupt line\n");
		return (ENXIO);
	}

	if ((fdc->flags & FDC_NODMA) == 0) {
		fdc->res_drq = bus_alloc_resource_any(dev, SYS_RES_DRQ,
		    &fdc->rid_drq, RF_ACTIVE | RF_SHAREABLE);
		if (fdc->res_drq == NULL) {
			device_printf(dev, "cannot reser