static int
ar71xx_ehci_attach(device_t self)
{
    struct ar71xx_ehci_softc *isc = device_get_softc(self);
    ehci_softc_t *sc = &isc->base;
    int err;
    int rid;

    /* initialise some bus fields */
    sc->sc_bus.parent = self;
    sc->sc_bus.devices = sc->sc_devices;
    sc->sc_bus.devices_max = EHCI_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(self), &ehci_iterate_hw_softc)) {
        return (ENOMEM);
    }

    sc->sc_bus.usbrev = USB_REV_2_0;

    /* NB: hints fix the memory location and irq */

    rid = 0;
    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");
        goto error;
    }

    /*
     * Craft special resource for bus space ops that handle
     * byte-alignment of non-word addresses.
     */
    sc->sc_io_tag = ar71xx_bus_space_reversed;
    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(self, SYS_RES_IRQ, &rid,
                                            RF_ACTIVE | RF_SHAREABLE);
    if (sc->sc_irq_res == NULL) {
        device_printf(self, "Could not allocate irq\n");
        goto error;
    }
    sc->sc_bus.bdev = device_add_child(self, "usbus", -1);
    if (!sc->sc_bus.bdev) {
        device_printf(self, "Could not add USB device\n");
        goto error;
    }
    device_set_ivars(sc->sc_bus.bdev, &sc->sc_bus);
    device_set_desc(sc->sc_bus.bdev, EHCI_HC_DEVSTR);

    sprintf(sc->sc_vendor, "Atheros");

    err = bus_setup_intr(self, sc->sc_irq_res, INTR_TYPE_BIO | INTR_MPSAFE,
                         NULL, ar71xx_ehci_intr, sc, &sc->sc_intr_hdl);
    if (err) {
        device_printf(self, "Could not setup irq, %d\n", err);
        sc->sc_intr_hdl = NULL;
        goto error;
    }

    /*
     * Arrange to force Host mode, select big-endian byte alignment,
     * and arrange to not terminate reset operations (the adapter
     * will ignore it if we do but might as well save a reg write).
     * Also, the controller has an embedded Transaction Translator
     * which means port speed must be read from the Port Status
     * register following a port enable.
     */
    sc->sc_flags = 0;
    sc->sc_vendor_post_reset = ar71xx_ehci_post_reset;

    switch (ar71xx_soc) {
    case AR71XX_SOC_AR7241:
    case AR71XX_SOC_AR7242:
    case AR71XX_SOC_AR9130:
    case AR71XX_SOC_AR9132:
    case AR71XX_SOC_AR9330:
    case AR71XX_SOC_AR9331:
    case AR71XX_SOC_AR9341:
    case AR71XX_SOC_AR9342:
    case AR71XX_SOC_AR9344:
    case AR71XX_SOC_QCA9533:
    case AR71XX_SOC_QCA9533_V2:
    case AR71XX_SOC_QCA9556:
    case AR71XX_SOC_QCA9558:
        sc->sc_flags |= EHCI_SCFLG_TT | EHCI_SCFLG_NORESTERM;
        sc->sc_vendor_get_port_speed =
            ehci_get_port_speed_portsc;
        break;
    default:
        /* fallthrough */
        break;
    }

    /*
     * ehci_reset() needs the correct offset to access the host controller
//.........这里部分代码省略.........

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);

	/* check for USB 3.0 controllers which don't support 64-bit DMA */
	switch (pci_get_devid(self)) {
	case 0x01941033:	/* NEC uPD720200 USB 3.0 controller */
		usedma32 = 1;
		break;
	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_lock, 0);

	rid = 0;
	if (xhci_use_msi) {
		count = pci_msi_count(self);
		if (count >= 1) {
			count = 1;
			if (pci_alloc_msi(self, &rid, 1, count) == 0) {
				if (bootverbose)
					device_printf(self, "MSI enabled\n");
				sc->sc_irq_rid = 1;
			}
		}
	}
	sc->sc_irq_res = bus_alloc_resource_any(self, SYS_RES_IRQ,
	    &sc->sc_irq_rid, RF_SHAREABLE | RF_ACTIVE);
	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);

	ksprintf(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_MPSAFE,
		    (driver_intr_t *)xhci_interrupt, sc, &sc->sc_intr_hdl, NULL);
		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;
	}

	/* On Intel chipsets reroute ports from EHCI to XHCI controller. */
	switch (pci_get_devid(self)) {
	case 0x0f358086:	/* BayTrail */
	case 0x9c318086:	/* Panther Point */
	case 0x1e318086:	/* Panther Point */
	case 0x8c318086:	/* Lynx Point */
	case 0x8cb18086:	/* Wildcat Point */
		sc->sc_port_route = &xhci_pci_port_route;
		sc->sc_imod_default = XHCI_IMOD_DEFAULT_LP;
		break;
	default:
//.........这里部分代码省略.........

static int
tws_attach(device_t dev)
{
    struct tws_softc *sc = device_get_softc(dev);
    u_int32_t bar;
    int error=0,i;

    /* no tracing yet */
    /* Look up our softc and initialize its fields. */
    sc->tws_dev = dev;
    sc->device_id = pci_get_device(dev);
    sc->subvendor_id = pci_get_subvendor(dev);
    sc->subdevice_id = pci_get_subdevice(dev);

    /* Intialize mutexes */
    mtx_init( &sc->q_lock, "tws_q_lock", NULL, MTX_DEF);
    mtx_init( &sc->sim_lock,  "tws_sim_lock", NULL, MTX_DEF);
    mtx_init( &sc->gen_lock,  "tws_gen_lock", NULL, MTX_DEF);
    mtx_init( &sc->io_lock,  "tws_io_lock", NULL, MTX_DEF | MTX_RECURSE);
    callout_init(&sc->stats_timer, CALLOUT_MPSAFE);

    if ( tws_init_trace_q(sc) == FAILURE )
        printf("trace init failure\n");
    /* send init event */
    mtx_lock(&sc->gen_lock);
    tws_send_event(sc, TWS_INIT_START);
    mtx_unlock(&sc->gen_lock);


#if _BYTE_ORDER == _BIG_ENDIAN
    TWS_TRACE(sc, "BIG endian", 0, 0);
#endif
    /* sysctl context setup */
    sysctl_ctx_init(&sc->tws_clist);
    sc->tws_oidp = SYSCTL_ADD_NODE(&sc->tws_clist,
                                   SYSCTL_STATIC_CHILDREN(_hw), OID_AUTO,
                                   device_get_nameunit(dev), 
                                   CTLFLAG_RD, 0, "");
    if ( sc->tws_oidp == NULL ) {
        tws_log(sc, SYSCTL_TREE_NODE_ADD);
        goto attach_fail_1;
    }
    SYSCTL_ADD_STRING(&sc->tws_clist, SYSCTL_CHILDREN(sc->tws_oidp),
                      OID_AUTO, "driver_version", CTLFLAG_RD,
                      TWS_DRIVER_VERSION_STRING, 0, "TWS driver version");

    pci_enable_busmaster(dev);

    bar = pci_read_config(dev, TWS_PCI_BAR0, 4);
    TWS_TRACE_DEBUG(sc, "bar0 ", bar, 0);
    bar = pci_read_config(dev, TWS_PCI_BAR1, 4);
    bar = bar & ~TWS_BIT2;
    TWS_TRACE_DEBUG(sc, "bar1 ", bar, 0);
 
    /* MFA base address is BAR2 register used for 
     * push mode. Firmware will evatualy move to 
     * pull mode during witch this needs to change
     */ 
#ifndef TWS_PULL_MODE_ENABLE
    sc->mfa_base = (u_int64_t)pci_read_config(dev, TWS_PCI_BAR2, 4);
    sc->mfa_base = sc->mfa_base & ~TWS_BIT2;
    TWS_TRACE_DEBUG(sc, "bar2 ", sc->mfa_base, 0);
#endif

    /* allocate MMIO register space */ 
    sc->reg_res_id = TWS_PCI_BAR1; /* BAR1 offset */
    if ((sc->reg_res = bus_alloc_resource(dev, SYS_RES_MEMORY,
                                &(sc->reg_res_id), 0, ~0, 1, RF_ACTIVE))
                                == NULL) {
        tws_log(sc, ALLOC_MEMORY_RES);
        goto attach_fail_1;
    }
    sc->bus_tag = rman_get_bustag(sc->reg_res);
    sc->bus_handle = rman_get_bushandle(sc->reg_res);

#ifndef TWS_PULL_MODE_ENABLE
    /* Allocate bus space for inbound mfa */ 
    sc->mfa_res_id = TWS_PCI_BAR2; /* BAR2 offset */
    if ((sc->mfa_res = bus_alloc_resource(dev, SYS_RES_MEMORY,
                          &(sc->mfa_res_id), 0, ~0, 0x100000, RF_ACTIVE))
                                == NULL) {
        tws_log(sc, ALLOC_MEMORY_RES);
        goto attach_fail_2;
    }
    sc->bus_mfa_tag = rman_get_bustag(sc->mfa_res);
    sc->bus_mfa_handle = rman_get_bushandle(sc->mfa_res);
#endif

    /* Allocate and register our interrupt. */
    sc->intr_type = TWS_INTx; /* default */

    if ( tws_enable_msi )
        sc->intr_type = TWS_MSI;
    if ( tws_setup_irq(sc) == FAILURE ) {
        tws_log(sc, ALLOC_MEMORY_RES);
        goto attach_fail_3;
    }

    /*
     * Create a /dev entry for this device.  The kernel will assign us
//.........这里部分代码省略.........

static int
atmegadci_attach(device_t dev)
{
	struct atmegadci_super_softc *sc = device_get_softc(dev);
	int err;
	int rid;

	/* setup MUSB OTG USB controller interface softc */
	sc->sc_otg.sc_clocks_on = &atmegadci_clocks_on;
	sc->sc_otg.sc_clocks_off = &atmegadci_clocks_off;

	/* initialise some bus fields */
	sc->sc_otg.sc_bus.parent = dev;
	sc->sc_otg.sc_bus.devices = sc->sc_otg.sc_devices;
	sc->sc_otg.sc_bus.devices_max = ATMEGA_MAX_DEVICES;

	/* get all DMA memory */
	if (usb_bus_mem_alloc_all(&sc->sc_otg.sc_bus,
	    USB_GET_DMA_TAG(dev), NULL)) {
		return (ENOMEM);
	}
	rid = 0;
	sc->sc_otg.sc_io_res =
	    bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, RF_ACTIVE);

	if (!(sc->sc_otg.sc_io_res)) {
		err = ENOMEM;
		goto error;
	}
	sc->sc_otg.sc_io_tag = rman_get_bustag(sc->sc_otg.sc_io_res);
	sc->sc_otg.sc_io_hdl = rman_get_bushandle(sc->sc_otg.sc_io_res);

	rid = 0;
	sc->sc_otg.sc_irq_res =
	    bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid, RF_ACTIVE);
	if (!(sc->sc_otg.sc_irq_res)) {
		goto error;
	}
	sc->sc_otg.sc_bus.bdev = device_add_child(dev, "usbus", -1);
	if (!(sc->sc_otg.sc_bus.bdev)) {
		goto error;
	}
	device_set_ivars(sc->sc_otg.sc_bus.bdev, &sc->sc_otg.sc_bus);

	err = bus_setup_intr(dev, sc->sc_otg.sc_irq_res, INTR_TYPE_BIO | INTR_MPSAFE,
	    NULL, (driver_intr_t *)atmegadci_interrupt, sc, &sc->sc_otg.sc_intr_hdl);
	if (err) {
		sc->sc_otg.sc_intr_hdl = NULL;
		goto error;
	}
	err = atmegadci_init(&sc->sc_otg);
	if (!err) {
		err = device_probe_and_attach(sc->sc_otg.sc_bus.bdev);
	}
	if (err) {
		goto error;
	}
	return (0);

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

int
scc_bfe_attach(device_t dev, u_int ipc)
{
	struct resource_list_entry *rle;
	struct scc_chan *ch;
	struct scc_class *cl;
	struct scc_mode *m;
	struct scc_softc *sc, *sc0;
	const char *sep;
	bus_space_handle_t bh;
	u_long base, size, start, sz;
	int c, error, mode, sysdev;

	/*
	 * The sc_class field defines the type of SCC we're going to work
	 * with and thus the size of the softc. Replace the generic softc
	 * with one that matches the SCC now that we're certain we handle
	 * the device.
	 */
	sc0 = device_get_softc(dev);
	cl = sc0->sc_class;
	if (cl->size > sizeof(*sc)) {
		sc = malloc(cl->size, M_SCC, M_WAITOK|M_ZERO);
		bcopy(sc0, sc, sizeof(*sc));
		device_set_softc(dev, sc);
	} else
		sc = sc0;

	size = abs(cl->cl_range) << sc->sc_bas.regshft;

	mtx_init(&sc->sc_hwmtx, "scc_hwmtx", NULL, MTX_SPIN);

	/*
	 * Re-allocate. We expect that the softc contains the information
	 * collected by scc_bfe_probe() intact.
	 */
	sc->sc_rres = bus_alloc_resource(dev, sc->sc_rtype, &sc->sc_rrid,
	    0, ~0, cl->cl_channels * size, RF_ACTIVE);
	if (sc->sc_rres == NULL)
		return (ENXIO);
	sc->sc_bas.bsh = rman_get_bushandle(sc->sc_rres);
	sc->sc_bas.bst = rman_get_bustag(sc->sc_rres);

	/*
	 * Allocate interrupt resources. There may be a different interrupt
	 * per channel. We allocate them all...
	 */
	sc->sc_chan = malloc(sizeof(struct scc_chan) * cl->cl_channels,
	    M_SCC, M_WAITOK | M_ZERO);
	for (c = 0; c < cl->cl_channels; c++) {
		ch = &sc->sc_chan[c];
		/*
		 * XXX temporary hack. If we have more than 1 interrupt
		 * per channel, allocate the first for the channel. At
		 * this time only the macio bus front-end has more than
		 * 1 interrupt per channel and we don't use the 2nd and
		 * 3rd, because we don't support DMA yet.
		 */
		ch->ch_irid = c * ipc;
		ch->ch_ires = bus_alloc_resource_any(dev, SYS_RES_IRQ,
		    &ch->ch_irid, RF_ACTIVE | RF_SHAREABLE);
		if (ipc == 0)
			break;
	}

	/*
	 * Create the control structures for our children. Probe devices
	 * and query them to see if we can reset the hardware.
	 */
	sysdev = 0;
	base = rman_get_start(sc->sc_rres);
	sz = (size != 0) ? size : rman_get_size(sc->sc_rres);
	start = base + ((cl->cl_range < 0) ? size * (cl->cl_channels - 1) : 0);
	for (c = 0; c < cl->cl_channels; c++) {
		ch = &sc->sc_chan[c];
		resource_list_init(&ch->ch_rlist);
		ch->ch_nr = c + 1;

		if (!SCC_ENABLED(sc, ch))
			goto next;

		ch->ch_enabled = 1;
		resource_list_add(&ch->ch_rlist, sc->sc_rtype, 0, start,
		    start + sz - 1, sz);
		rle = resource_list_find(&ch->ch_rlist, sc->sc_rtype, 0);
		rle->res = &ch->ch_rres;
		bus_space_subregion(rman_get_bustag(sc->sc_rres),
		    rman_get_bushandle(sc->sc_rres), start - base, sz, &bh);
		rman_set_bushandle(rle->res, bh);
		rman_set_bustag(rle->res, rman_get_bustag(sc->sc_rres));

		resource_list_add(&ch->ch_rlist, SYS_RES_IRQ, 0, c, c, 1);
		rle = resource_list_find(&ch->ch_rlist, SYS_RES_IRQ, 0);
		rle->res = (ch->ch_ires != NULL) ? ch->ch_ires :
			    sc->sc_chan[0].ch_ires;

		for (mode = 0; mode < SCC_NMODES; mode++) {
			m = &ch->ch_mode[mode];
			m->m_chan = ch;
			m->m_mode = 1U << mode;
//.........这里部分代码省略.........

/*
 * Function name:	twa_attach
 * Description:		Allocates pci resources; updates sc; adds a node to the
 *			sysctl tree to expose the driver version; makes calls
 *			(to the Common Layer) to initialize ctlr, and to
 *			attach to CAM.
 *
 * Input:		dev	-- bus device corresponding to the ctlr
 * Output:		None
 * Return value:	0	-- success
 *			non-zero-- failure
 */
static TW_INT32
twa_attach(device_t dev)
{
	struct twa_softc	*sc = device_get_softc(dev);
	TW_INT32		bar_num;
	TW_INT32		bar0_offset;
	TW_INT32		bar_size;
	TW_INT32		error;

	tw_osli_dbg_dprintf(3, sc, "entered");

	sc->ctlr_handle.osl_ctlr_ctxt = sc;

	/* Initialize the softc structure. */
	sc->bus_dev = dev;
	sc->device_id = pci_get_device(dev);

	/* Initialize the mutexes right here. */
	sc->io_lock = &(sc->io_lock_handle);
	mtx_init(sc->io_lock, "tw_osl_io_lock", NULL, MTX_SPIN);
	sc->q_lock = &(sc->q_lock_handle);
	mtx_init(sc->q_lock, "tw_osl_q_lock", NULL, MTX_SPIN);
	sc->sim_lock = &(sc->sim_lock_handle);
	mtx_init(sc->sim_lock, "tw_osl_sim_lock", NULL, MTX_DEF | MTX_RECURSE);

	sysctl_ctx_init(&sc->sysctl_ctxt);
	sc->sysctl_tree = SYSCTL_ADD_NODE(&sc->sysctl_ctxt,
		SYSCTL_STATIC_CHILDREN(_hw), OID_AUTO,
		device_get_nameunit(dev), CTLFLAG_RD, 0, "");
	if (sc->sysctl_tree == NULL) {
		tw_osli_printf(sc, "error = %d",
			TW_CL_SEVERITY_ERROR_STRING,
			TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
			0x2000,
			"Cannot add sysctl tree node",
			ENXIO);
		return(ENXIO);
	}
	SYSCTL_ADD_STRING(&sc->sysctl_ctxt, SYSCTL_CHILDREN(sc->sysctl_tree),
		OID_AUTO, "driver_version", CTLFLAG_RD,
		TW_OSL_DRIVER_VERSION_STRING, 0, "TWA driver version");

	/* Force the busmaster enable bit on, in case the BIOS forgot. */
	pci_enable_busmaster(dev);

	/* Allocate the PCI register window. */
	if ((error = tw_cl_get_pci_bar_info(sc->device_id, TW_CL_BAR_TYPE_MEM,
		&bar_num, &bar0_offset, &bar_size))) {
		tw_osli_printf(sc, "error = %d",
			TW_CL_SEVERITY_ERROR_STRING,
			TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
			0x201F,
			"Can't get PCI BAR info",
			error);
		tw_osli_free_resources(sc);
		return(error);
	}
	sc->reg_res_id = PCIR_BARS + bar0_offset;
	if ((sc->reg_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY,
				&(sc->reg_res_id), RF_ACTIVE))
				== NULL) {
		tw_osli_printf(sc, "error = %d",
			TW_CL_SEVERITY_ERROR_STRING,
			TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
			0x2002,
			"Can't allocate register window",
			ENXIO);
		tw_osli_free_resources(sc);
		return(ENXIO);
	}
	sc->bus_tag = rman_get_bustag(sc->reg_res);
	sc->bus_handle = rman_get_bushandle(sc->reg_res);

	/* Allocate and register our interrupt. */
	sc->irq_res_id = 0;
	if ((sc->irq_res = bus_alloc_resource_any(sc->bus_dev, SYS_RES_IRQ,
				&(sc->irq_res_id),
				RF_SHAREABLE | RF_ACTIVE)) == NULL) {
		tw_osli_printf(sc, "error = %d",
			TW_CL_SEVERITY_ERROR_STRING,
			TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
			0x2003,
			"Can't allocate interrupt",
			ENXIO);
		tw_osli_free_resources(sc);
		return(ENXIO);
	}
	if ((error = twa_setup_intr(sc))) {
//.........这里部分代码省略.........

static int
bt3c_pccard_attach(device_t dev)
{
	bt3c_softc_p	sc = (bt3c_softc_p) device_get_softc(dev);

	/* Allocate I/O ports */
	sc->iobase_rid = 0;
	sc->iobase = bus_alloc_resource(dev, SYS_RES_IOPORT, &sc->iobase_rid, 
			0, ~0, 8, RF_ACTIVE);
	if (sc->iobase == NULL) {
		device_printf(dev, "Could not allocate I/O ports\n");
		goto bad;
	}
	sc->iot = rman_get_bustag(sc->iobase);
	sc->ioh = rman_get_bushandle(sc->iobase);

	/* Allocate IRQ */
	sc->irq_rid = 0;
	sc->irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &sc->irq_rid,
			RF_ACTIVE);
	if (sc->irq == NULL) {
		device_printf(dev, "Could not allocate IRQ\n");
		goto bad;
	}

	sc->irq_cookie = NULL;
	if (bus_setup_intr(dev, sc->irq, 0, bt3c_intr, sc,
			&sc->irq_cookie, NULL) != 0) {
		device_printf(dev, "Could not setup ISR\n");
		goto bad;
	}

	/* Attach handler to TTY SWI thread */
	sc->ith = NULL;
	sc->ith = register_swi_mp(SWI_TTY, bt3c_swi_intr, sc,
	    device_get_nameunit(dev), NULL, -1);
	if (sc->ith == NULL) {
		device_printf(dev, "Could not setup SWI ISR\n");
		goto bad;
	}

	/* Create Netgraph node */
	if (ng_make_node_common(&typestruct, &sc->node) != 0) {
		device_printf(dev, "Could not create Netgraph node\n");
		sc->node = NULL;
		goto bad;
	}

	/* Name Netgraph node */
	if (ng_name_node(sc->node, device_get_nameunit(dev)) != 0) {
		device_printf(dev, "Could not name Netgraph node\n");
		NG_NODE_UNREF(sc->node);
		sc->node = NULL;
		goto bad;
	}

	sc->dev = dev;
	sc->debug = NG_BT3C_WARN_LEVEL;

	sc->inq.ifq_maxlen = sc->outq.ifq_maxlen = BT3C_DEFAULTQLEN;

	sc->state = NG_BT3C_W4_PKT_IND;
	sc->want = 1;

	NG_NODE_SET_PRIVATE(sc->node, sc);

	return (0);
bad:
	if (sc->ith != NULL) {
		unregister_swi(sc->ith, SWI_TTY, -1);
		sc->ith = NULL;
	}

	if (sc->irq != NULL) {
		if (sc->irq_cookie != NULL)
			bus_teardown_intr(dev, sc->irq, sc->irq_cookie);

		bus_release_resource(dev, SYS_RES_IRQ,
			sc->irq_rid, sc->irq);

		sc->irq = NULL;
		sc->irq_rid = 0;
	}

	if (sc->iobase != NULL) {
		bus_release_resource(dev, SYS_RES_IOPORT,
			sc->iobase_rid, sc->iobase);

		sc->iobase = NULL;
		sc->iobase_rid = 0;
	}

	return (ENXIO);
} /* bt3c_pccacd_attach */

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

    /* XXX check for 64-bit capability */

    if (xhci_init(sc, self)) {
        device_printf(self, "Could not initialize softc\n");
        goto error;
    }

    pci_enable_busmaster(self);

    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");
        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(self, SYS_RES_IRQ, &rid,
                                            RF_SHAREABLE | RF_ACTIVE);
    if (sc->sc_irq_res == NULL) {
        device_printf(self, "Could not allocate IRQ\n");
        goto error;
    }
    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);

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

    err = bus_setup_intr(self, sc->sc_irq_res, INTR_MPSAFE,
                         (driver_intr_t *)xhci_interrupt, sc, &sc->sc_intr_hdl, NULL);
    if (err) {
        device_printf(self, "Could not setup IRQ, err=%d\n", err);
        sc->sc_intr_hdl = NULL;
        goto error;
    }
    xhci_pci_take_controller(self);

    err = xhci_halt_controller(sc);

    if (err == 0)
        err = xhci_start_controller(sc);

    if (err == 0)
        err = device_probe_and_attach(sc->sc_bus.bdev);

    if (err) {
        device_printf(self, "XHCI halt/start/probe failed err=%d\n", err);
        goto error;
    }
    return (0);

error:
    xhci_pci_detach(self);
    return (ENXIO);
}

static int
imx_ehci_attach(device_t dev)
{
	struct imx_ehci_softc *sc;
	ehci_softc_t *esc;
	int err, rid;

	sc = device_get_softc(dev);
	esc = &sc->ehci_softc;
	err = 0;

	/* Allocate bus_space resources. */
	rid = 0;
	sc->ehci_mem_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid,
	    RF_ACTIVE);
	if (sc->ehci_mem_res == NULL) {
		device_printf(dev, "Cannot allocate memory resources\n");
		err = ENXIO;
		goto out;
	}

	rid = 0;
	sc->ehci_irq_res = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid,
	    RF_ACTIVE);
	if (sc->ehci_irq_res == NULL) {
		device_printf(dev, "Cannot allocate IRQ resources\n");
		err = ENXIO;
		goto out;
	}

	esc->sc_io_tag = rman_get_bustag(sc->ehci_mem_res);
	esc->sc_bus.parent = dev;
	esc->sc_bus.devices = esc->sc_devices;
	esc->sc_bus.devices_max = EHCI_MAX_DEVICES;
	esc->sc_bus.dma_bits = 32;

	/* allocate all DMA memory */
	if (usb_bus_mem_alloc_all(&esc->sc_bus, USB_GET_DMA_TAG(dev),
	    &ehci_iterate_hw_softc) != 0) {
		device_printf(dev, "usb_bus_mem_alloc_all() failed\n");
		err = ENOMEM;
		goto out;
	}

	/*
	 * Set handle to USB related registers subregion used by
	 * generic EHCI driver.
	 */
	err = bus_space_subregion(esc->sc_io_tag, 
	    rman_get_bushandle(sc->ehci_mem_res),
	    IMX_EHCI_REG_OFF, IMX_EHCI_REG_SIZE, &esc->sc_io_hdl);
	if (err != 0) {
		device_printf(dev, "bus_space_subregion() failed\n");
		err = ENXIO;
		goto out;
	}

	/* Setup interrupt handler. */
	err = bus_setup_intr(dev, sc->ehci_irq_res, INTR_TYPE_BIO, NULL, 
	    (driver_intr_t *)ehci_interrupt, esc, &esc->sc_intr_hdl);
	if (err != 0) {
		device_printf(dev, "Could not setup IRQ\n");
		goto out;
	}

	/* Turn on clocks. */
	imx_ccm_usb_enable(dev);

	/* Add USB bus device. */
	esc->sc_bus.bdev = device_add_child(dev, "usbus", -1);
	if (esc->sc_bus.bdev == NULL) {
		device_printf(dev, "Could not add USB device\n");
		goto out;
	}
	device_set_ivars(esc->sc_bus.bdev, &esc->sc_bus);

	esc->sc_id_vendor = USB_VENDOR_FREESCALE;
	strlcpy(esc->sc_vendor, "Freescale", sizeof(esc->sc_vendor));

	/* Set flags that affect ehci_init() behavior. */
	esc->sc_flags |= EHCI_SCFLG_DONTRESET | EHCI_SCFLG_NORESTERM;
	err = ehci_init(esc);
	if (err != 0) {
		device_printf(dev, "USB init failed, usb_err_t=%d\n", 
		    err);
		goto out;
	}
	esc->sc_flags |= EHCI_SCFLG_DONEINIT;

	/* Probe the bus. */
	err = device_probe_and_attach(esc->sc_bus.bdev);
	if (err != 0) {
		device_printf(dev,
		    "device_probe_and_attach() failed\n");
		goto out;
	}

	err = 0;

out:
//.........这里部分代码省略.........

static int
exynos_xhci_attach(device_t dev)
{
	struct exynos_xhci_softc *esc = device_get_softc(dev);
	bus_space_handle_t bsh;
	int err;

	esc->dev = dev;

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

	/* XHCI registers */
	esc->base.sc_io_tag = rman_get_bustag(esc->res[0]);
	bsh = rman_get_bushandle(esc->res[0]);
	esc->base.sc_io_size = rman_get_size(esc->res[0]);

	/* DWC3 ctrl registers */
	esc->bst = rman_get_bustag(esc->res[1]);
	esc->bsh = rman_get_bushandle(esc->res[1]);

	/*
	 * Set handle to USB related registers subregion used by
	 * generic XHCI driver.
	 */
	err = bus_space_subregion(esc->base.sc_io_tag, bsh, 0x0,
	    esc->base.sc_io_size, &esc->base.sc_io_hdl);
	if (err != 0) {
		device_printf(dev, "Subregion failed\n");
		bus_release_resources(dev, exynos_xhci_spec, esc->res);
		return (ENXIO);
	}

	if (xhci_init(&esc->base, dev, 0)) {
		device_printf(dev, "Could not initialize softc\n");
		bus_release_resources(dev, exynos_xhci_spec, esc->res);
		return (ENXIO);
	}

	/* Setup interrupt handler */
	err = bus_setup_intr(dev, esc->res[2], INTR_TYPE_BIO | INTR_MPSAFE,
	    NULL, (driver_intr_t *)xhci_interrupt, &esc->base,
	    &esc->base.sc_intr_hdl);
	if (err) {
		device_printf(dev, "Could not setup irq, %d\n", err);
		esc->base.sc_intr_hdl = NULL;
		goto error;
	}

	/* Add USB device */
	esc->base.sc_bus.bdev = device_add_child(dev, "usbus", -1);
	if (esc->base.sc_bus.bdev == NULL) {
		device_printf(dev, "Could not add USB device\n");
		goto error;
	}
	device_set_ivars(esc->base.sc_bus.bdev, &esc->base.sc_bus);
	strlcpy(esc->base.sc_vendor, "Samsung", sizeof(esc->base.sc_vendor));

	dwc3_init(esc);

	err = xhci_halt_controller(&esc->base);
	if (err == 0) {
		device_printf(dev, "Starting controller\n");
		err = xhci_start_controller(&esc->base);
	}
	if (err == 0) {
		device_printf(dev, "Controller started\n");
		err = device_probe_and_attach(esc->base.sc_bus.bdev);
	}
	if (err != 0)
		goto error;
	return (0);

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

static int
ohci_pci_attach(device_t self)
{
	ohci_softc_t *sc = device_get_softc(self);
	int rid;
	int err;

	/* initialise some bus fields */
	sc->sc_bus.parent = self;
	sc->sc_bus.devices = sc->sc_devices;
	sc->sc_bus.devices_max = OHCI_MAX_DEVICES;

	/* get all DMA memory */
	if (usb_bus_mem_alloc_all(&sc->sc_bus, USB_GET_DMA_TAG(self),
	    &ohci_iterate_hw_softc)) {
		return (ENOMEM);
	}
	sc->sc_dev = self;

	pci_enable_busmaster(self);

	/*
	 * Some Sun PCIO-2 USB controllers have their intpin register
	 * bogusly set to 0, although it should be 4.  Correct that.
	 */
	if (pci_get_devid(self) == 0x1103108e && pci_get_intpin(self) == 0)
		pci_set_intpin(self, 4);

	rid = PCI_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");
		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(self, SYS_RES_IRQ, &rid,
	    RF_SHAREABLE | RF_ACTIVE);
	if (sc->sc_irq_res == NULL) {
		device_printf(self, "Could not allocate irq\n");
		goto error;
	}
	sc->sc_bus.bdev = device_add_child(self, "usbus", -1);
	if (!sc->sc_bus.bdev) {
		device_printf(self, "Could not add USB device\n");
		goto error;
	}
	device_set_ivars(sc->sc_bus.bdev, &sc->sc_bus);

	/*
	 * ohci_pci_match will never return NULL if ohci_pci_probe
	 * succeeded
	 */
	device_set_desc(sc->sc_bus.bdev, ohci_pci_match(self));
	switch (pci_get_vendor(self)) {
	case PCI_OHCI_VENDORID_ACERLABS:
		sprintf(sc->sc_vendor, "AcerLabs");
		break;
	case PCI_OHCI_VENDORID_AMD:
		sprintf(sc->sc_vendor, "AMD");
		break;
	case PCI_OHCI_VENDORID_APPLE:
		sprintf(sc->sc_vendor, "Apple");
		break;
	case PCI_OHCI_VENDORID_ATI:
		sprintf(sc->sc_vendor, "ATI");
		break;
	case PCI_OHCI_VENDORID_CMDTECH:
		sprintf(sc->sc_vendor, "CMDTECH");
		break;
	case PCI_OHCI_VENDORID_NEC:
		sprintf(sc->sc_vendor, "NEC");
		break;
	case PCI_OHCI_VENDORID_NVIDIA:
	case PCI_OHCI_VENDORID_NVIDIA2:
		sprintf(sc->sc_vendor, "nVidia");
		break;
	case PCI_OHCI_VENDORID_OPTI:
		sprintf(sc->sc_vendor, "OPTi");
		break;
	case PCI_OHCI_VENDORID_SIS:
		sprintf(sc->sc_vendor, "SiS");
		break;
	case PCI_OHCI_VENDORID_SUN:
		sprintf(sc->sc_vendor, "SUN");
		break;
	default:
		if (bootverbose) {
			device_printf(self, "(New OHCI DeviceId=0x%08x)\n",
			    pci_get_devid(self));
		}
		sprintf(sc->sc_vendor, "(0x%04x)", pci_get_vendor(self));
	}

	/* sc->sc_bus.usbrev; set by ohci_init() */

//.........这里部分代码省略.........

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.........

static int
ath_pci_attach(device_t dev)
{
	struct ath_pci_softc *psc = device_get_softc(dev);
	struct ath_softc *sc = &psc->sc_sc;
	int error = ENXIO;
	int rid;
#ifdef	ATH_EEPROM_FIRMWARE
	const struct firmware *fw = NULL;
	const char *buf;
#endif

	sc->sc_dev = dev;

	/*
	 * Enable bus mastering.
	 */
	pci_enable_busmaster(dev);

	/*
	 * Setup other PCI bus configuration parameters.
	 */
	ath_pci_setup(dev);

	/* 
	 * Setup memory-mapping of PCI registers.
	 */
	rid = BS_BAR;
	psc->sc_sr = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid,
					    RF_ACTIVE);
	if (psc->sc_sr == NULL) {
		device_printf(dev, "cannot map register space\n");
		goto bad;
	}
	/* XXX uintptr_t is a bandaid for ia64; to be fixed */
	sc->sc_st = (HAL_BUS_TAG)(uintptr_t) rman_get_bustag(psc->sc_sr);
	sc->sc_sh = (HAL_BUS_HANDLE) rman_get_bushandle(psc->sc_sr);
	/*
	 * Mark device invalid so any interrupts (shared or otherwise)
	 * that arrive before the HAL is setup are discarded.
	 */
	sc->sc_invalid = 1;

	/*
	 * Arrange interrupt line.
	 */
	rid = 0;
	psc->sc_irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid,
					     RF_SHAREABLE|RF_ACTIVE);
	if (psc->sc_irq == NULL) {
		device_printf(dev, "could not map interrupt\n");
		goto bad1;
	}
	if (bus_setup_intr(dev, psc->sc_irq,
			   INTR_TYPE_NET | INTR_MPSAFE,
			   NULL, ath_intr, sc, &psc->sc_ih)) {
		device_printf(dev, "could not establish interrupt\n");
		goto bad2;
	}

	/*
	 * Setup DMA descriptor area.
	 */
	if (bus_dma_tag_create(bus_get_dma_tag(dev),	/* parent */
			       1, 0,			/* alignment, bounds */
			       BUS_SPACE_MAXADDR_32BIT,	/* lowaddr */
			       BUS_SPACE_MAXADDR,	/* highaddr */
			       NULL, NULL,		/* filter, filterarg */
			       0x3ffff,			/* maxsize XXX */
			       ATH_MAX_SCATTER,		/* nsegments */
			       0x3ffff,			/* maxsegsize XXX */
			       BUS_DMA_ALLOCNOW,	/* flags */
			       NULL,			/* lockfunc */
			       NULL,			/* lockarg */
			       &sc->sc_dmat)) {
		device_printf(dev, "cannot allocate DMA tag\n");
		goto bad3;
	}

#ifdef	ATH_EEPROM_FIRMWARE
	/*
	 * If there's an EEPROM firmware image, load that in.
	 */
	if (resource_string_value(device_get_name(dev), device_get_unit(dev),
	    "eeprom_firmware", &buf) == 0) {
		if (bootverbose)
			device_printf(dev, "%s: looking up firmware @ '%s'\n",
			    __func__, buf);

		fw = firmware_get(buf);
		if (fw == NULL) {
			device_printf(dev, "%s: couldn't find firmware\n",
			    __func__);
			goto bad3;
		}

		device_printf(dev, "%s: EEPROM firmware @ %p\n",
		    __func__, fw->data);
		sc->sc_eepromdata =
		    malloc(fw->datasize, M_TEMP, M_WAITOK | M_ZERO);
//.........这里部分代码省略.........

static int
ehci_pci_attach(device_t self)
{
	ehci_softc_t *sc = device_get_softc(self);
	int err;
	int rid;

	/* initialise some bus fields */
	sc->sc_bus.parent = self;
	sc->sc_bus.devices = sc->sc_devices;
	sc->sc_bus.devices_max = EHCI_MAX_DEVICES;

	/* get all DMA memory */
	if (usb_bus_mem_alloc_all(&sc->sc_bus,
	    USB_GET_DMA_TAG(self), &ehci_iterate_hw_softc)) {
		return (ENOMEM);
	}

	pci_enable_busmaster(self);

	switch (pci_read_config(self, PCI_USBREV, 1) & PCI_USB_REV_MASK) {
	case PCI_USB_REV_PRE_1_0:
	case PCI_USB_REV_1_0:
	case PCI_USB_REV_1_1:
		/*
		 * NOTE: some EHCI USB controllers have the wrong USB
		 * revision number. It appears those controllers are
		 * fully compliant so we just ignore this value in
		 * some common cases.
		 */
		device_printf(self, "pre-2.0 USB revision (ignored)\n");
		/* fallthrough */
	case PCI_USB_REV_2_0:
		break;
	default:
		/* Quirk for Parallels Desktop 4.0 */
		device_printf(self, "USB revision is unknown. Assuming v2.0.\n");
		break;
	}

	rid = PCI_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");
		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(self, SYS_RES_IRQ, &rid,
	    RF_SHAREABLE | RF_ACTIVE);
	if (sc->sc_irq_res == NULL) {
		device_printf(self, "Could not allocate irq\n");
		goto error;
	}
	sc->sc_bus.bdev = device_add_child(self, "usbus", -1);
	if (!sc->sc_bus.bdev) {
		device_printf(self, "Could not add USB device\n");
		goto error;
	}
	device_set_ivars(sc->sc_bus.bdev, &sc->sc_bus);

	/*
	 * ehci_pci_match will never return NULL if ehci_pci_probe
	 * succeeded
	 */
	device_set_desc(sc->sc_bus.bdev, ehci_pci_match(self));
	switch (pci_get_vendor(self)) {
	case PCI_EHCI_VENDORID_ACERLABS:
		sprintf(sc->sc_vendor, "AcerLabs");
		break;
	case PCI_EHCI_VENDORID_AMD:
		sprintf(sc->sc_vendor, "AMD");
		break;
	case PCI_EHCI_VENDORID_APPLE:
		sprintf(sc->sc_vendor, "Apple");
		break;
	case PCI_EHCI_VENDORID_ATI:
		sprintf(sc->sc_vendor, "ATI");
		break;
	case PCI_EHCI_VENDORID_CMDTECH:
		sprintf(sc->sc_vendor, "CMDTECH");
		break;
	case PCI_EHCI_VENDORID_INTEL:
		sprintf(sc->sc_vendor, "Intel");
		break;
	case PCI_EHCI_VENDORID_NEC:
		sprintf(sc->sc_vendor, "NEC");
		break;
	case PCI_EHCI_VENDORID_OPTI:
		sprintf(sc->sc_vendor, "OPTi");
		break;
	case PCI_EHCI_VENDORID_PHILIPS:
		sprintf(sc->sc_vendor, "Philips");
		break;
	case PCI_EHCI_VENDORID_SIS:
		sprintf(sc->sc_vendor, "SiS");
//.........这里部分代码省略.........

/*
 * Check if the device can be found at the port given
 */
static int
aha_isa_probe(device_t dev)
{
	/*
	 * find unit and check we have that many defined
	 */
	struct	aha_softc *aha = device_get_softc(dev);
	int	error;
	u_long	port_start;
	struct resource *port_res;
	int	port_rid;
	int	drq;
	int	irq;
	config_data_t config_data;

	aha->dev = dev;
	/* Check isapnp ids */
	if (ISA_PNP_PROBE(device_get_parent(dev), dev, aha_ids) == ENXIO)
		return (ENXIO);

	port_rid = 0;
	port_res = bus_alloc_resource(dev, SYS_RES_IOPORT, &port_rid,
	    0, ~0, AHA_NREGS, RF_ACTIVE);

	if (port_res == NULL)
		return (ENXIO);

	port_start = rman_get_start(port_res);
	aha_alloc(aha, device_get_unit(dev), rman_get_bustag(port_res),
	    rman_get_bushandle(port_res));

	/* See if there is really a card present */
	if (aha_probe(aha) || aha_fetch_adapter_info(aha)) {
		aha_free(aha);
		bus_release_resource(dev, SYS_RES_IOPORT, port_rid, port_res);
		return (ENXIO);
	}

	/*
	 * Determine our IRQ, and DMA settings and
	 * export them to the configuration system.
	 */
	error = aha_cmd(aha, AOP_INQUIRE_CONFIG, NULL, /*parmlen*/0,
	    (uint8_t*)&config_data, sizeof(config_data), DEFAULT_CMD_TIMEOUT);

	if (error != 0) {
		device_printf(dev, "Could not determine IRQ or DMA "
		    "settings for adapter at %#jx.  Failing probe\n",
		    (uintmax_t)port_start);
		aha_free(aha);
		bus_release_resource(dev, SYS_RES_IOPORT, port_rid,
		    port_res);
		return (ENXIO);
	}

	bus_release_resource(dev, SYS_RES_IOPORT, port_rid, port_res);

	switch (config_data.dma_chan) {
	case DMA_CHAN_5:
		drq = 5;
		break;
	case DMA_CHAN_6:
		drq = 6;
		break;
	case DMA_CHAN_7:
		drq = 7;
		break;
	default:
		device_printf(dev, "Invalid DMA setting for adapter at %#jx.",
		    (uintmax_t)port_start);
		return (ENXIO);
	}
	error = bus_set_resource(dev, SYS_RES_DRQ, 0, drq, 1);
	if (error)
		return error;

	irq = ffs(config_data.irq) + 8;
	error = bus_set_resource(dev, SYS_RES_IRQ, 0, irq, 1);
	return (error);
}