C++ device_get_nameunit函数代码示例

static int
le_dma_attach(device_t dev)
{
	struct le_dma_softc *lesc;
	struct lsi64854_softc *dma;
	struct lance_softc *sc;
	int error, i;

	lesc = device_get_softc(dev);
	sc = &lesc->sc_am7990.lsc;

	LE_LOCK_INIT(sc, device_get_nameunit(dev));

	/*
	 * Establish link to `ledma' device.
	 * XXX hackery.
	 */
	dma = (struct lsi64854_softc *)device_get_softc(device_get_parent(dev));
	lesc->sc_dma = dma;
	lesc->sc_dma->sc_client = lesc;

	i = 0;
	lesc->sc_rres = bus_alloc_resource_any(dev, SYS_RES_MEMORY,
	    &i, RF_ACTIVE);
	if (lesc->sc_rres == NULL) {
		device_printf(dev, "cannot allocate registers\n");
		error = ENXIO;
		goto fail_mtx;
	}

	i = 0;
	if ((lesc->sc_ires = bus_alloc_resource_any(dev, SYS_RES_IRQ,
	    &i, RF_SHAREABLE | RF_ACTIVE)) == NULL) {
		device_printf(dev, "cannot allocate interrupt\n");
		error = ENXIO;
		goto fail_rres;
	}

	/* Attach the DMA engine. */
	error = lsi64854_attach(dma);
	if (error != 0) {
		device_printf(dev, "lsi64854_attach failed\n");
		goto fail_ires;
	}

	sc->sc_memsize = LEDMA_MEMSIZE;
	error = bus_dma_tag_create(
	    dma->sc_parent_dmat,	/* parent */
	    LEDMA_ALIGNMENT,		/* alignment */
	    LEDMA_BOUNDARY,		/* boundary */
	    BUS_SPACE_MAXADDR_32BIT,	/* lowaddr */
	    BUS_SPACE_MAXADDR,		/* highaddr */
	    NULL, NULL,			/* filter, filterarg */
	    sc->sc_memsize,		/* maxsize */
	    1,				/* nsegments */
	    sc->sc_memsize,		/* maxsegsize */
	    0,				/* flags */
	    NULL, NULL,			/* lockfunc, lockarg */
	    &lesc->sc_dmat);
	if (error != 0) {
		device_printf(dev, "cannot allocate buffer DMA tag\n");
		goto fail_lsi;
	}

	error = bus_dmamem_alloc(lesc->sc_dmat, (void **)&sc->sc_mem,
	    BUS_DMA_WAITOK | BUS_DMA_COHERENT, &lesc->sc_dmam);
	if (error != 0) {
		device_printf(dev, "cannot allocate DMA buffer memory\n");
		goto fail_dtag;
	}

	lesc->sc_laddr = 0;
	error = bus_dmamap_load(lesc->sc_dmat, lesc->sc_dmam, sc->sc_mem,
	    sc->sc_memsize, le_dma_dma_callback, lesc, 0);
	if (error != 0 || lesc->sc_laddr == 0) {
		device_printf(dev, "cannot load DMA buffer map\n");
		goto fail_dmem;
	}

	sc->sc_addr = lesc->sc_laddr & 0xffffff;
	sc->sc_flags = 0;
	sc->sc_conf3 = LE_C3_BSWP | LE_C3_ACON | LE_C3_BCON;

	sc->sc_mediachange = le_dma_supmediachange;
	sc->sc_mediastatus = le_dma_supmediastatus;
	sc->sc_supmedia = le_dma_supmedia;
	sc->sc_nsupmedia = nitems(le_dma_supmedia);
	sc->sc_defaultmedia = le_dma_supmedia[0];

	OF_getetheraddr(dev, sc->sc_enaddr);

	sc->sc_copytodesc = lance_copytobuf_contig;
	sc->sc_copyfromdesc = lance_copyfrombuf_contig;
	sc->sc_copytobuf = lance_copytobuf_contig;
	sc->sc_copyfrombuf = lance_copyfrombuf_contig;
	sc->sc_zerobuf = lance_zerobuf_contig;

	sc->sc_rdcsr = le_dma_rdcsr;
	sc->sc_wrcsr = le_dma_wrcsr;
	sc->sc_hwreset = le_dma_hwreset;
//.........这里部分代码省略.........

static int
ahc_pci_attach(device_t dev)
{
	struct	 ahc_pci_identity *entry;
	struct	 ahc_softc *ahc;
	char	*name;
	int	 error;

	entry = ahc_find_pci_device(dev);
	if (entry == NULL)
		return (ENXIO);

	/*
	 * 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));

	/*
	 * Should we bother disabling 39Bit addressing
	 * based on installed memory?
	 */
	if (sizeof(bus_addr_t) > 4)
                ahc->flags |= AHC_39BIT_ADDRESSING;

	/* Allocate a dmatag for our SCB DMA maps */
	error = aic_dma_tag_create(ahc, /*parent*/bus_get_dma_tag(dev),
				   /*alignment*/1, /*boundary*/0,
				   (ahc->flags & AHC_39BIT_ADDRESSING)
				   ? 0x7FFFFFFFFFLL
				   : 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_pci_attach: Could not allocate DMA tag "
		       "- error %d\n", error);
		ahc_free(ahc);
		return (ENOMEM);
	}
	ahc->dev_softc = dev;
	error = ahc_pci_config(ahc, entry);
	if (error != 0) {
		ahc_free(ahc);
		return (error);
	}

	ahc_attach(ahc);
	return (0);
}

static int
tsec_fdt_attach(device_t dev)
{
	struct tsec_softc *sc;
	phandle_t phy;
	int error = 0;

	sc = device_get_softc(dev);
	sc->dev = dev;
	sc->node = ofw_bus_get_node(dev);

	/* Get phy address from fdt */
	if (OF_getencprop(sc->node, "phy-handle", &phy, sizeof(phy)) <= 0) {
		device_printf(dev, "PHY not found in device tree");
		return (ENXIO);
	}

	phy = OF_node_from_xref(phy);
	OF_decode_addr(OF_parent(phy), 0, &sc->phy_bst, &sc->phy_bsh);
	OF_getencprop(phy, "reg", &sc->phyaddr, sizeof(sc->phyaddr));

	/* Init timer */
	callout_init(&sc->tsec_callout, 1);

	/* Init locks */
	mtx_init(&sc->transmit_lock, device_get_nameunit(dev), "TSEC TX lock",
	    MTX_DEF);
	mtx_init(&sc->receive_lock, device_get_nameunit(dev), "TSEC RX lock",
	    MTX_DEF);
	mtx_init(&sc->ic_lock, device_get_nameunit(dev), "TSEC IC lock",
	    MTX_DEF);

	/* Allocate IO memory for TSEC registers */
	sc->sc_rrid = 0;
	sc->sc_rres = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &sc->sc_rrid,
	    RF_ACTIVE);
	if (sc->sc_rres == NULL) {
		device_printf(dev, "could not allocate IO memory range!\n");
		goto fail1;
	}
	sc->sc_bas.bsh = rman_get_bushandle(sc->sc_rres);
	sc->sc_bas.bst = rman_get_bustag(sc->sc_rres);

	/* TSEC attach */
	if (tsec_attach(sc) != 0) {
		device_printf(dev, "could not be configured\n");
		goto fail2;
	}

	/* Set up interrupts (TX/RX/ERR) */
	sc->sc_transmit_irid = TSEC_RID_TXIRQ;
	error = tsec_setup_intr(sc, &sc->sc_transmit_ires,
	    &sc->sc_transmit_ihand, &sc->sc_transmit_irid,
	    tsec_transmit_intr, "TX");
	if (error)
		goto fail2;

	sc->sc_receive_irid = TSEC_RID_RXIRQ;
	error = tsec_setup_intr(sc, &sc->sc_receive_ires,
	    &sc->sc_receive_ihand, &sc->sc_receive_irid,
	    tsec_receive_intr, "RX");
	if (error)
		goto fail3;

	sc->sc_error_irid = TSEC_RID_ERRIRQ;
	error = tsec_setup_intr(sc, &sc->sc_error_ires,
	    &sc->sc_error_ihand, &sc->sc_error_irid,
	    tsec_error_intr, "ERR");
	if (error)
		goto fail4;

	return (0);

fail4:
	tsec_release_intr(sc, sc->sc_receive_ires, sc->sc_receive_ihand,
	    sc->sc_receive_irid, "RX");
fail3:
	tsec_release_intr(sc, sc->sc_transmit_ires, sc->sc_transmit_ihand,
	    sc->sc_transmit_irid, "TX");
fail2:
	bus_release_resource(dev, SYS_RES_MEMORY, sc->sc_rrid, sc->sc_rres);
fail1:
	mtx_destroy(&sc->receive_lock);
	mtx_destroy(&sc->transmit_lock);
	return (ENXIO);
}

//.........这里部分代码省略.........
		break;
	case 4:
		burst_log = 2;
		break;
	case 8:
		burst_log = 3;
		break;
	case 16:
	default:
		burst_log = 4;
		break;
	}
	reg |= (burst_log << LCDDMA_CTRL_BURST_SIZE_SHIFT);
	/* XXX: FIFO TH */
	reg |= (0 << LCDDMA_CTRL_TH_FIFO_RDY_SHIFT);
	LCD_WRITE4(sc, LCD_LCDDMA_CTRL, reg); 

	LCD_WRITE4(sc, LCD_LCDDMA_FB0_BASE, sc->sc_fb_phys); 
	LCD_WRITE4(sc, LCD_LCDDMA_FB0_CEILING, sc->sc_fb_phys + sc->sc_fb_size - 1); 
	LCD_WRITE4(sc, LCD_LCDDMA_FB1_BASE, sc->sc_fb_phys); 
	LCD_WRITE4(sc, LCD_LCDDMA_FB1_CEILING, sc->sc_fb_phys + sc->sc_fb_size - 1); 

	/* Enable LCD */
	reg = RASTER_CTRL_LCDTFT;
	reg |= (panel.fdd << RASTER_CTRL_REQDLY_SHIFT);
	reg |= (PALETTE_DATA_ONLY << RASTER_CTRL_PALMODE_SHIFT);
	if (panel.bpp >= 24)
		reg |= RASTER_CTRL_TFT24;
	if (panel.bpp == 32)
		reg |= RASTER_CTRL_TFT24_UNPACKED;
	LCD_WRITE4(sc, LCD_RASTER_CTRL, reg); 

	LCD_WRITE4(sc, LCD_CLKC_ENABLE,
	    CLKC_ENABLE_DMA | CLKC_ENABLE_LDID | CLKC_ENABLE_CORE);

	LCD_WRITE4(sc, LCD_CLKC_RESET, CLKC_RESET_MAIN);
	DELAY(100);
	LCD_WRITE4(sc, LCD_CLKC_RESET, 0);

	reg = IRQ_EOF1 | IRQ_EOF0 | IRQ_FUF | IRQ_PL |
	    IRQ_ACB | IRQ_SYNC_LOST |  IRQ_RASTER_DONE |
	    IRQ_FRAME_DONE;
	LCD_WRITE4(sc, LCD_IRQENABLE_SET, reg);

	reg = LCD_READ4(sc, LCD_RASTER_CTRL);
 	reg |= RASTER_CTRL_LCDEN;
	LCD_WRITE4(sc, LCD_RASTER_CTRL, reg); 

	LCD_WRITE4(sc, LCD_SYSCONFIG,
	    SYSCONFIG_STANDBY_SMART | SYSCONFIG_IDLE_SMART); 

	/* Init backlight interface */
	ctx = device_get_sysctl_ctx(sc->sc_dev);
	tree = device_get_sysctl_tree(sc->sc_dev);
	sc->sc_oid = SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(tree), OID_AUTO,
	    "backlight", CTLTYPE_INT | CTLFLAG_RW, sc, 0,
	    am335x_lcd_sysctl_backlight, "I", "LCD backlight");
	sc->sc_backlight = 0;
	/* Check if eCAS interface is available at this point */
	if (am335x_pwm_config_ecap(PWM_UNIT,
	    PWM_PERIOD, PWM_PERIOD) == 0)
		sc->sc_backlight = 100;

	sc->sc_fb_info.fb_name = device_get_nameunit(sc->sc_dev);
	sc->sc_fb_info.fb_vbase = (intptr_t)sc->sc_fb_base;
	sc->sc_fb_info.fb_pbase = sc->sc_fb_phys;
	sc->sc_fb_info.fb_size = sc->sc_fb_size;
	sc->sc_fb_info.fb_bpp = sc->sc_fb_info.fb_depth = panel.bpp;
	sc->sc_fb_info.fb_stride = panel.panel_width*panel.bpp / 8;
	sc->sc_fb_info.fb_width = panel.panel_width;
	sc->sc_fb_info.fb_height = panel.panel_height;

#ifdef	DEV_SC
	err = (sc_attach_unit(device_get_unit(dev),
	    device_get_flags(dev) | SC_AUTODETECT_KBD));

	if (err) {
		device_printf(dev, "failed to attach syscons\n");
		goto fail;
	}

	am335x_lcd_syscons_setup((vm_offset_t)sc->sc_fb_base, sc->sc_fb_phys, &panel);
#else /* VT */
	device_t fbd = device_add_child(dev, "fbd",
	device_get_unit(dev));
	if (fbd == NULL) {
		device_printf(dev, "Failed to add fbd child\n");
		goto fail;
	}
	if (device_probe_and_attach(fbd) != 0) {
		device_printf(dev, "Failed to attach fbd device\n");
		goto fail;
	}
#endif

	return (0);

fail:
	return (err);
}

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);
}

//.........这里部分代码省略.........
		}
		gpio = OF_node_from_xref(gpios[i]);
		/* If we have bussc, ignore devices from other gpios. */
		if (bussc != NULL)
			if (ofw_bus_get_node(bussc->sc_dev) != gpio)
				return (0);
		/*
		 * Check for gpio-controller property and read the #gpio-cells
		 * for this GPIO controller.
		 */
		if (!OF_hasprop(gpio, "gpio-controller") ||
		    OF_getencprop(gpio, "#gpio-cells", &gpiocells,
		    sizeof(gpiocells)) < 0) {
			device_printf(consumer,
			    "gpio reference is not a gpio-controller.\n");
			OF_prop_free(gpios);
			return (-1);
		}
		if (ncells - i < gpiocells + 1) {
			device_printf(consumer,
			    "%s cells doesn't match #gpio-cells.\n", pname);
			return (-1);
		}
		npins++;
		i += gpiocells + 1;
	}
	if (npins == 0 || pins == NULL) {
		if (npins == 0)
			device_printf(consumer, "no pin specified in %s.\n",
			    pname);
		OF_prop_free(gpios);
		return (npins);
	}
	*pins = malloc(sizeof(struct gpiobus_pin) * npins, M_DEVBUF,
	    M_NOWAIT | M_ZERO);
	if (*pins == NULL) {
		OF_prop_free(gpios);
		return (-1);
	}
	/* Decode the gpio specifier on the second pass. */
	i = 0;
	j = 0;
	while (i < ncells) {
		/* Allow NULL specifiers. */
		if (gpios[i] == 0) {
			j++;
			i++;
			continue;
		}
		gpio = OF_node_from_xref(gpios[i]);
		/* Read gpio-cells property for this GPIO controller. */
		if (OF_getencprop(gpio, "#gpio-cells", &gpiocells,
		    sizeof(gpiocells)) < 0) {
			device_printf(consumer,
			    "gpio does not have the #gpio-cells property.\n");
			goto fail;
		}
		/* Return the device reference for the GPIO controller. */
		(*pins)[j].dev = OF_device_from_xref(gpios[i]);
		if ((*pins)[j].dev == NULL) {
			device_printf(consumer,
			    "no device registered for the gpio controller.\n");
			goto fail;
		}
		/*
		 * If the gpiobus softc is NULL we use the GPIO_GET_BUS() to
		 * retrieve it.  The GPIO_GET_BUS() method is only valid after
		 * the child is probed and attached.
		 */
		if (bussc == NULL) {
			if (GPIO_GET_BUS((*pins)[j].dev) == NULL) {
				device_printf(consumer,
				    "no gpiobus reference for %s.\n",
				    device_get_nameunit((*pins)[j].dev));
				goto fail;
			}
			bussc = device_get_softc(GPIO_GET_BUS((*pins)[j].dev));
		}
		/* Get the GPIO pin number and flags. */
		if (gpio_map_gpios((*pins)[j].dev, cnode, gpio, gpiocells,
		    &gpios[i + 1], &(*pins)[j].pin, &(*pins)[j].flags) != 0) {
			device_printf(consumer,
			    "cannot map the gpios specifier.\n");
			goto fail;
		}
		/* Reserve the GPIO pin. */
		if (gpiobus_map_pin(bussc->sc_busdev, (*pins)[j].pin) != 0)
			goto fail;
		j++;
		i += gpiocells + 1;
	}
	OF_prop_free(gpios);

	return (npins);

fail:
	OF_prop_free(gpios);
	free(*pins, M_DEVBUF);
	return (-1);
}

static void
ue_attach_post_task(struct usb_proc_msg *_task)
{
	struct usb_ether_cfg_task *task =
	    (struct usb_ether_cfg_task *)_task;
	struct usb_ether *ue = task->ue;
	struct ifnet *ifp = uether_getifp(ue);
	int error;
	char num[14];			/* sufficient for 32 bits */

	/* first call driver's post attach routine */
	ue->ue_methods->ue_attach_post(ue);

	UE_UNLOCK(ue);

	KKASSERT(!lockowned(ue->ue_lock));
	ue->ue_unit = devfs_clone_bitmap_get(&DEVFS_CLONE_BITMAP(ue), 0);
	usb_callout_init_mtx(&ue->ue_watchdog, ue->ue_lock, 0);
	sysctl_ctx_init(&ue->ue_sysctl_ctx);

	KKASSERT(!lockowned(ue->ue_lock));
	error = 0;

	ifp->if_softc = ue;
	if_initname(ifp, "ue", ue->ue_unit);
	if (ue->ue_methods->ue_attach_post_sub != NULL) {
		error = ue->ue_methods->ue_attach_post_sub(ue);
		KKASSERT(!lockowned(ue->ue_lock));
	} else {
		ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST;
		if (ue->ue_methods->ue_ioctl != NULL)
			ifp->if_ioctl = ue->ue_methods->ue_ioctl;
		else
			ifp->if_ioctl = uether_ioctl;
		ifp->if_start = ue_start;
		ifp->if_init = ue_init;
		ifq_set_maxlen(&ifp->if_snd, ifqmaxlen);
		ifq_set_ready(&ifp->if_snd);

		if (ue->ue_methods->ue_mii_upd != NULL &&
		    ue->ue_methods->ue_mii_sts != NULL) {
			error = mii_phy_probe(ue->ue_dev, &ue->ue_miibus, 
					      ue_ifmedia_upd, ue->ue_methods->ue_mii_sts);
		}
	}

	if (error) {
		device_printf(ue->ue_dev, "attaching PHYs failed\n");
		goto fail;
	}

	if_printf(ifp, "<USB Ethernet> on %s\n", device_get_nameunit(ue->ue_dev));
	ether_ifattach(ifp, ue->ue_eaddr, NULL);
	/* Tell upper layer we support VLAN oversized frames. */
	if (ifp->if_capabilities & IFCAP_VLAN_MTU)
		ifp->if_hdrlen = sizeof(struct ether_vlan_header);

	ksnprintf(num, sizeof(num), "%u", ue->ue_unit);
	ue->ue_sysctl_oid = SYSCTL_ADD_NODE(&ue->ue_sysctl_ctx,
	    &SYSCTL_NODE_CHILDREN(_net, ue),
	    OID_AUTO, num, CTLFLAG_RD, NULL, "");
	SYSCTL_ADD_PROC(&ue->ue_sysctl_ctx,
	    SYSCTL_CHILDREN(ue->ue_sysctl_oid), OID_AUTO,
	    "%parent", CTLTYPE_STRING | CTLFLAG_RD, ue, 0,
	    ue_sysctl_parent, "A", "parent device");

	KKASSERT(!lockowned(ue->ue_lock));
	UE_LOCK(ue);
	return;

fail:
	devfs_clone_bitmap_put(&DEVFS_CLONE_BITMAP(ue), ue->ue_unit);
	UE_LOCK(ue);
	return;
}

/*------------------------------------------------------------------------*
 *	usb_attach_sub
 *
 * This function creates a thread which runs the USB attach code.
 *------------------------------------------------------------------------*/
static void
usb_attach_sub(device_t dev, struct usb_bus *bus)
{
	const char *pname = device_get_nameunit(dev);

	mtx_lock(&Giant);
	if (usb_devclass_ptr == NULL)
		usb_devclass_ptr = devclass_find("usbus");
	mtx_unlock(&Giant);

#if USB_HAVE_PF
	usbpf_attach(bus);
#endif
	/* Initialise USB process messages */
	bus->explore_msg[0].hdr.pm_callback = &usb_bus_explore;
	bus->explore_msg[0].bus = bus;
	bus->explore_msg[1].hdr.pm_callback = &usb_bus_explore;
	bus->explore_msg[1].bus = bus;

	bus->detach_msg[0].hdr.pm_callback = &usb_bus_detach;
	bus->detach_msg[0].bus = bus;
	bus->detach_msg[1].hdr.pm_callback = &usb_bus_detach;
	bus->detach_msg[1].bus = bus;

	bus->attach_msg[0].hdr.pm_callback = &usb_bus_attach;
	bus->attach_msg[0].bus = bus;
	bus->attach_msg[1].hdr.pm_callback = &usb_bus_attach;
	bus->attach_msg[1].bus = bus;

	bus->suspend_msg[0].hdr.pm_callback = &usb_bus_suspend;
	bus->suspend_msg[0].bus = bus;
	bus->suspend_msg[1].hdr.pm_callback = &usb_bus_suspend;
	bus->suspend_msg[1].bus = bus;

	bus->resume_msg[0].hdr.pm_callback = &usb_bus_resume;
	bus->resume_msg[0].bus = bus;
	bus->resume_msg[1].hdr.pm_callback = &usb_bus_resume;
	bus->resume_msg[1].bus = bus;

	bus->reset_msg[0].hdr.pm_callback = &usb_bus_reset;
	bus->reset_msg[0].bus = bus;
	bus->reset_msg[1].hdr.pm_callback = &usb_bus_reset;
	bus->reset_msg[1].bus = bus;

	bus->shutdown_msg[0].hdr.pm_callback = &usb_bus_shutdown;
	bus->shutdown_msg[0].bus = bus;
	bus->shutdown_msg[1].hdr.pm_callback = &usb_bus_shutdown;
	bus->shutdown_msg[1].bus = bus;

#if USB_HAVE_UGEN
	LIST_INIT(&bus->pd_cleanup_list);
	bus->cleanup_msg[0].hdr.pm_callback = &usb_bus_cleanup;
	bus->cleanup_msg[0].bus = bus;
	bus->cleanup_msg[1].hdr.pm_callback = &usb_bus_cleanup;
	bus->cleanup_msg[1].bus = bus;
#endif

	/* Create USB explore and callback processes */

	if (usb_proc_create(&bus->giant_callback_proc,
	    &bus->bus_mtx, pname, USB_PRI_MED)) {
		device_printf(dev, "WARNING: Creation of USB Giant "
		    "callback process failed.\n");
	} else if (usb_proc_create(&bus->non_giant_callback_proc,
	    &bus->bus_mtx, pname, USB_PRI_HIGH)) {
		device_printf(dev, "WARNING: Creation of USB non-Giant "
		    "callback process failed.\n");
	} else if (usb_proc_create(&bus->explore_proc,
	    &bus->bus_mtx, pname, USB_PRI_MED)) {
		device_printf(dev, "WARNING: Creation of USB explore "
		    "process failed.\n");
	} else if (usb_proc_create(&bus->control_xfer_proc,
	    &bus->bus_mtx, pname, USB_PRI_MED)) {
		device_printf(dev, "WARNING: Creation of USB control transfer "
		    "process failed.\n");
	} else {
		/* Get final attach going */
		USB_BUS_LOCK(bus);
		usb_proc_msignal(&bus->explore_proc,
		    &bus->attach_msg[0], &bus->attach_msg[1]);
		USB_BUS_UNLOCK(bus);

		/* Do initial explore */
		usb_needs_explore(bus, 1);
	}
}

static int
jz4780_mmc_attach(device_t dev)
{
	struct jz4780_mmc_softc *sc;
	struct sysctl_ctx_list *ctx;
	struct sysctl_oid_list *tree;
	device_t child;
	ssize_t len;
	pcell_t prop;
	phandle_t node;

	sc = device_get_softc(dev);
	sc->sc_dev = dev;
	sc->sc_req = NULL;
	if (bus_alloc_resources(dev, jz4780_mmc_res_spec, sc->sc_res) != 0) {
		device_printf(dev, "cannot allocate device resources\n");
		return (ENXIO);
	}
	sc->sc_bst = rman_get_bustag(sc->sc_res[JZ_MSC_MEMRES]);
	sc->sc_bsh = rman_get_bushandle(sc->sc_res[JZ_MSC_MEMRES]);
	if (bus_setup_intr(dev, sc->sc_res[JZ_MSC_IRQRES],
	    INTR_TYPE_MISC | INTR_MPSAFE, NULL, jz4780_mmc_intr, sc,
	    &sc->sc_intrhand)) {
		bus_release_resources(dev, jz4780_mmc_res_spec, sc->sc_res);
		device_printf(dev, "cannot setup interrupt handler\n");
		return (ENXIO);
	}
	sc->sc_timeout = 10;
	ctx = device_get_sysctl_ctx(dev);
	tree = SYSCTL_CHILDREN(device_get_sysctl_tree(dev));
	SYSCTL_ADD_INT(ctx, tree, OID_AUTO, "req_timeout", CTLFLAG_RW,
	    &sc->sc_timeout, 0, "Request timeout in seconds");
	mtx_init(&sc->sc_mtx, device_get_nameunit(sc->sc_dev), "jz4780_mmc",
	    MTX_DEF);
	callout_init_mtx(&sc->sc_timeoutc, &sc->sc_mtx, 0);

	/* Reset controller. */
	if (jz4780_mmc_reset(sc) != 0) {
		device_printf(dev, "cannot reset the controller\n");
		goto fail;
	}
	if (jz4780_mmc_pio_mode == 0 && jz4780_mmc_setup_dma(sc) != 0) {
		device_printf(sc->sc_dev, "Couldn't setup DMA!\n");
		jz4780_mmc_pio_mode = 1;
	}
	if (bootverbose)
		device_printf(sc->sc_dev, "DMA status: %s\n",
		    jz4780_mmc_pio_mode ? "disabled" : "enabled");

	node = ofw_bus_get_node(dev);
	/* Determine max operating frequency */
	sc->sc_host.f_max = 24000000;
	len = OF_getencprop(node, "max-frequency", &prop, sizeof(prop));
	if (len / sizeof(prop) == 1)
		sc->sc_host.f_max = prop;
	sc->sc_host.f_min = sc->sc_host.f_max / 128;

	sc->sc_host.host_ocr = MMC_OCR_320_330 | MMC_OCR_330_340;
	sc->sc_host.caps = MMC_CAP_HSPEED;
	sc->sc_host.mode = mode_sd;
	/*
	 * Check for bus-width property, default to both 4 and 8 bit
	 * if no bus width is specified.
	 */
	len = OF_getencprop(node, "bus-width", &prop, sizeof(prop));
	if (len / sizeof(prop) != 1)
		sc->sc_host.caps |= MMC_CAP_4_BIT_DATA | MMC_CAP_8_BIT_DATA;
	else if (prop == 8)
		sc->sc_host.caps |= MMC_CAP_8_BIT_DATA;
	else if (prop == 4)
		sc->sc_host.caps |= MMC_CAP_4_BIT_DATA;
	/* Activate the module clock. */
	if (jz4780_mmc_enable_clock(sc) != 0) {
		device_printf(dev, "cannot activate mmc clock\n");
		goto fail;
	}

	child = device_add_child(dev, "mmc", -1);
	if (child == NULL) {
		device_printf(dev, "attaching MMC bus failed!\n");
		goto fail;
	}
	if (device_probe_and_attach(child) != 0) {
		device_printf(dev, "attaching MMC child failed!\n");
		device_delete_child(dev, child);
		goto fail;
	}

	return (0);

fail:
	callout_drain(&sc->sc_timeoutc);
	mtx_destroy(&sc->sc_mtx);
	bus_teardown_intr(dev, sc->sc_res[JZ_MSC_IRQRES], sc->sc_intrhand);
	bus_release_resources(dev, jz4780_mmc_res_spec, sc->sc_res);
	if (sc->sc_clk != NULL)
		clk_release(sc->sc_clk);
	return (ENXIO);
}

static int
pcf_isa_attach(device_t dev)
{
	struct pcf_softc *sc;
	int rv = ENXIO;

	sc = DEVTOSOFTC(dev);
	mtx_init(&sc->pcf_lock, device_get_nameunit(dev), "pcf", MTX_DEF);

	/* IO port is mandatory */
	sc->res_ioport = bus_alloc_resource_any(dev, SYS_RES_IOPORT,
						&sc->rid_ioport, RF_ACTIVE);
	if (sc->res_ioport == 0) {
		device_printf(dev, "cannot reserve I/O port range\n");
		goto error;
	}

	sc->pcf_flags = device_get_flags(dev);

	if (!(sc->pcf_flags & IIC_POLLED)) {
		sc->res_irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &sc->rid_irq,
						     RF_ACTIVE);
		if (sc->res_irq == 0) {
			device_printf(dev, "can't reserve irq, polled mode.\n");
			sc->pcf_flags |= IIC_POLLED;
		}
	}

	/* reset the chip */
	pcf_rst_card(dev, IIC_FASTEST, PCF_DEFAULT_ADDR, NULL);

	if (sc->res_irq) {
		rv = bus_setup_intr(dev, sc->res_irq,
				    INTR_TYPE_NET /* | INTR_ENTROPY */,
				    NULL, pcf_intr, sc, &sc->intr_cookie);
		if (rv) {
			device_printf(dev, "could not setup IRQ\n");
			goto error;
		}
	}

	if ((sc->iicbus = device_add_child(dev, "iicbus", -1)) == NULL)
		device_printf(dev, "could not allocate iicbus instance\n");

	/* probe and attach the iicbus */
	bus_generic_attach(dev);

	return (0);

error:
	if (sc->res_irq != 0) {
		bus_release_resource(dev, SYS_RES_IRQ, sc->rid_irq,
				     sc->res_irq);
	}
	if (sc->res_ioport != 0) {
		bus_release_resource(dev, SYS_RES_IOPORT, sc->rid_ioport,
				     sc->res_ioport);
	}
	mtx_destroy(&sc->pcf_lock);
	return (rv);
}

static int
vtbe_attach(device_t dev)
{
	uint8_t macaddr[ETHER_ADDR_LEN];
	struct vtbe_softc *sc;
	struct ifnet *ifp;
	int reg;

	sc = device_get_softc(dev);
	sc->dev = dev;

	sc->hdrsize = sizeof(struct virtio_net_hdr_mrg_rxbuf);

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

	/* Memory interface */
	sc->bst = rman_get_bustag(sc->res[0]);
	sc->bsh = rman_get_bushandle(sc->res[0]);

	mtx_init(&sc->mtx, device_get_nameunit(sc->dev),
	    MTX_NETWORK_LOCK, MTX_DEF);

	if (setup_offset(dev, &sc->beri_mem_offset) != 0)
		return (ENXIO);
	if (setup_pio(dev, "pio-send", &sc->pio_send) != 0)
		return (ENXIO);
	if (setup_pio(dev, "pio-recv", &sc->pio_recv) != 0)
		return (ENXIO);

	/* Setup MMIO */

	/* Specify that we provide network device */
	reg = htobe32(VIRTIO_ID_NETWORK);
	WRITE4(sc, VIRTIO_MMIO_DEVICE_ID, reg);

	/* The number of desc we support */
	reg = htobe32(DESC_COUNT);
	WRITE4(sc, VIRTIO_MMIO_QUEUE_NUM_MAX, reg);

	/* Our features */
	reg = htobe32(VIRTIO_NET_F_MAC |
			VIRTIO_NET_F_MRG_RXBUF |
    			VIRTIO_F_NOTIFY_ON_EMPTY);
	WRITE4(sc, VIRTIO_MMIO_HOST_FEATURES, reg);

	/* Get MAC */
	if (vtbe_get_hwaddr(sc, macaddr)) {
		device_printf(sc->dev, "can't get mac\n");
		return (ENXIO);
	}

	/* Set up the ethernet interface. */
	sc->ifp = ifp = if_alloc(IFT_ETHER);
	ifp->if_baudrate = IF_Gbps(10);
	ifp->if_softc = sc;
	if_initname(ifp, device_get_name(dev), device_get_unit(dev));
	ifp->if_flags = (IFF_BROADCAST | IFF_SIMPLEX |
			 IFF_MULTICAST | IFF_PROMISC);
	ifp->if_capabilities = IFCAP_VLAN_MTU;
	ifp->if_capenable = ifp->if_capabilities;
	ifp->if_start = vtbe_txstart;
	ifp->if_ioctl = vtbe_ioctl;
	ifp->if_init = vtbe_init;
	IFQ_SET_MAXLEN(&ifp->if_snd, DESC_COUNT - 1);
	ifp->if_snd.ifq_drv_maxlen = DESC_COUNT - 1;
	IFQ_SET_READY(&ifp->if_snd);
	ifp->if_hdrlen = sizeof(struct ether_vlan_header);

	/* All ready to run, attach the ethernet interface. */
	ether_ifattach(ifp, macaddr);

	sc->is_attached = true;

	return (0);
}

static void
ahci_em_emulate_ses_on_led(device_t dev, union ccb *ccb)
{
	struct ahci_enclosure *enc;
	struct ses_status_page *page;
	struct ses_status_array_dev_slot *ads, *ads0;
	struct ses_elm_desc_hdr *elmd;
	uint8_t *buf;
	int i;

	enc = device_get_softc(dev);
	buf = ccb->ataio.data_ptr;

	/* General request validation. */
	if (ccb->ataio.cmd.command != ATA_SEP_ATTN ||
	    ccb->ataio.dxfer_len < ccb->ataio.cmd.sector_count * 4) {
		ccb->ccb_h.status = CAM_REQ_INVALID;
		goto out;
	}

	/* SEMB IDENTIFY */
	if (ccb->ataio.cmd.features == 0xEC &&
	    ccb->ataio.cmd.sector_count >= 16) {
		bzero(buf, ccb->ataio.dxfer_len);
		buf[0] = 64;		/* Valid bytes. */
		buf[2] = 0x30;		/* NAA Locally Assigned. */
		strncpy(&buf[3], device_get_nameunit(dev), 7);
		strncpy(&buf[10], "AHCI    ", SID_VENDOR_SIZE);
		strncpy(&buf[18], "SGPIO Enclosure ", SID_PRODUCT_SIZE);
		strncpy(&buf[34], "1.00", SID_REVISION_SIZE);
		strncpy(&buf[39], "0001", 4);
		strncpy(&buf[43], "S-E-S ", 6);
		strncpy(&buf[49], "2.00", 4);
		ccb->ccb_h.status = CAM_REQ_CMP;
		goto out;
	}

	/* SEMB RECEIVE DIAGNOSTIC RESULT (0) */
	page = (struct ses_status_page *)buf;
	if (ccb->ataio.cmd.lba_low == 0x02 &&
	    ccb->ataio.cmd.features == 0x00 &&
	    ccb->ataio.cmd.sector_count >= 2) {
		bzero(buf, ccb->ataio.dxfer_len);
		page->hdr.page_code = 0;
		scsi_ulto2b(4, page->hdr.length);
		buf[4] = 0;
		buf[5] = 1;
		buf[6] = 2;
		buf[7] = 7;
		ccb->ccb_h.status = CAM_REQ_CMP;
		goto out;
	}

	/* SEMB RECEIVE DIAGNOSTIC RESULT (1) */
	if (ccb->ataio.cmd.lba_low == 0x02 &&
	    ccb->ataio.cmd.features == 0x01 &&
	    ccb->ataio.cmd.sector_count >= 13) {
		struct ses_enc_desc *ed;
		struct ses_elm_type_desc *td;

		bzero(buf, ccb->ataio.dxfer_len);
		page->hdr.page_code = 0x01;
		scsi_ulto2b(4 + 4 + 36 + 4, page->hdr.length);
		ed = (struct ses_enc_desc *)&buf[8];
		ed->byte0 = 0x11;
		ed->subenc_id = 0;
		ed->num_types = 1;
		ed->length = 36;
		strncpy(ed->vendor_id, "AHCI    ", SID_VENDOR_SIZE);
		strncpy(ed->product_id, "SGPIO Enclosure ", SID_PRODUCT_SIZE);
		strncpy(ed->product_rev, "    ", SID_REVISION_SIZE);
		td = (struct ses_elm_type_desc *)ses_enc_desc_next(ed);
		td->etype_elm_type = 0x17;
		td->etype_maxelt = enc->channels;
		td->etype_subenc = 0;
		td->etype_txt_len = 0;
		ccb->ccb_h.status = CAM_REQ_CMP;
		goto out;
	}

	/* SEMB RECEIVE DIAGNOSTIC RESULT (2) */
	if (ccb->ataio.cmd.lba_low == 0x02 &&
	    ccb->ataio.cmd.features == 0x02 &&
	    ccb->ataio.cmd.sector_count >= (3 + enc->channels)) {
		bzero(buf, ccb->ataio.dxfer_len);
		page->hdr.page_code = 0x02;
		scsi_ulto2b(4 + 4 * (1 + enc->channels),
		    page->hdr.length);
		for (i = 0; i < enc->channels; i++) {
			ads = &page->elements[i + 1].array_dev_slot;
			memcpy(ads, enc->status[i], 4);
			ads->common.bytes[0] |=
			    (enc->ichannels & (1 << i)) ?
			     SES_OBJSTAT_UNKNOWN :
			     SES_OBJSTAT_NOTINSTALLED;
		}
		ccb->ccb_h.status = CAM_REQ_CMP;
		goto out;
	}

//.........这里部分代码省略.........

/*
 * Interrupt handler. This handler is bus-independent. Note that our
 * interrupt may be shared, so we must handle "false" interrupts.
 */
void
ichsmb_device_intr(void *cookie)
{
	const sc_p sc = cookie;
	const device_t dev = sc->dev;
	const int maxloops = 16;
	u_int8_t status;
	u_int8_t ok_bits;
	int cmd_index;
        int count;

	lockmgr(&sc->mutex, LK_EXCLUSIVE);
	for (count = 0; count < maxloops; count++) {

		/* Get and reset status bits */
		status = bus_read_1(sc->io_res, ICH_HST_STA);
#if ICHSMB_DEBUG
		if ((status & ~(ICH_HST_STA_INUSE_STS | ICH_HST_STA_HOST_BUSY))
		    || count > 0) {
			DBG("%d stat=0x%02x\n", count, status);
		}
#endif
		status &= ~(ICH_HST_STA_INUSE_STS | ICH_HST_STA_HOST_BUSY);
		if (status == 0)
			break;

		/* Check for unexpected interrupt */
		ok_bits = ICH_HST_STA_SMBALERT_STS;
		cmd_index = sc->ich_cmd >> 2;
		if (sc->ich_cmd != -1) {
			KASSERT(cmd_index < sizeof(ichsmb_state_irqs),
			    ("%s: ich_cmd=%d", device_get_nameunit(dev),
			    sc->ich_cmd));
			ok_bits |= ichsmb_state_irqs[cmd_index];
		}
		if ((status & ~ok_bits) != 0) {
			device_printf(dev, "irq 0x%02x during %d\n", status,
			    cmd_index);
			bus_write_1(sc->io_res,
			    ICH_HST_STA, (status & ~ok_bits));
			continue;
		}

		/* Handle SMBALERT interrupt */
		if (status & ICH_HST_STA_SMBALERT_STS) {
			static int smbalert_count = 16;
			if (smbalert_count > 0) {
				device_printf(dev, "SMBALERT# rec'd\n");
				if (--smbalert_count == 0) {
					device_printf(dev,
					    "not logging anymore\n");
				}
			}
		}

		/* Check for bus error */
		if (status & ICH_HST_STA_BUS_ERR) {
			sc->smb_error = SMB_ECOLLI;	/* XXX SMB_EBUSERR? */
			goto finished;
		}

		/* Check for device error */
		if (status & ICH_HST_STA_DEV_ERR) {
			sc->smb_error = SMB_ENOACK;	/* or SMB_ETIMEOUT? */
			goto finished;
		}

		/* Check for byte completion in block transfer */
		if (status & ICH_HST_STA_BYTE_DONE_STS) {
			if (sc->block_write) {
				if (sc->block_index < sc->block_count) {

					/* Write next byte */
					bus_write_1(sc->io_res,
					    ICH_BLOCK_DB,
					    sc->block_data[sc->block_index++]);
				}
			} else {

				/* First interrupt, get the count also */
				if (sc->block_index == 0) {
					sc->block_count = bus_read_1(
					    sc->io_res, ICH_D0);
				}

				/* Get next byte, if any */
				if (sc->block_index < sc->block_count) {

					/* Read next byte */
					sc->block_data[sc->block_index++] =
					    bus_read_1(sc->io_res,
					      ICH_BLOCK_DB);

					/* Set "LAST_BYTE" bit before reading
					   the last byte of block data */
					if (sc->block_index
//.........这里部分代码省略.........

/*
 * device related interfaces
 */
static int
ata_ioctl(struct dev_ioctl_args *ap)
{
    device_t device, *children;
    struct ata_ioc_devices *devices = (struct ata_ioc_devices *)ap->a_data;
    int *value = (int *)ap->a_data;
    int i, nchildren, error = ENOTTY;

    switch (ap->a_cmd) {
    case IOCATAGMAXCHANNEL:
	*value = devclass_get_maxunit(ata_devclass);
	error = 0;
	break;

    case IOCATAREINIT:
	if (*value > devclass_get_maxunit(ata_devclass) ||
	    !(device = devclass_get_device(ata_devclass, *value)))
	    return ENXIO;
	error = ata_reinit(device);
	ata_start(device);
	break;

    case IOCATAATTACH:
	if (*value > devclass_get_maxunit(ata_devclass) ||
	    !(device = devclass_get_device(ata_devclass, *value)))
	    return ENXIO;
	/* XXX SOS should enable channel HW on controller */
	error = ata_attach(device);
	break;

    case IOCATADETACH:
	if (*value > devclass_get_maxunit(ata_devclass) ||
	    !(device = devclass_get_device(ata_devclass, *value)))
	    return ENXIO;
	error = ata_detach(device);
	/* XXX SOS should disable channel HW on controller */
	break;

    case IOCATADEVICES:
	if (devices->channel > devclass_get_maxunit(ata_devclass) ||
	    !(device = devclass_get_device(ata_devclass, devices->channel)))
	    return ENXIO;
	bzero(devices->name[0], 32);
	bzero(&devices->params[0], sizeof(struct ata_params));
	bzero(devices->name[1], 32);
	bzero(&devices->params[1], sizeof(struct ata_params));
	if (!device_get_children(device, &children, &nchildren)) {
	    for (i = 0; i < nchildren; i++) {
		if (children[i] && device_is_attached(children[i])) {
		    struct ata_device *atadev = device_get_softc(children[i]);

		    if (atadev->unit == ATA_MASTER) {
			strncpy(devices->name[0],
				device_get_nameunit(children[i]), 32);
			bcopy(&atadev->param, &devices->params[0],
			      sizeof(struct ata_params));
		    }
		    if (atadev->unit == ATA_SLAVE) {
			strncpy(devices->name[1],
				device_get_nameunit(children[i]), 32);
			bcopy(&atadev->param, &devices->params[1],
			      sizeof(struct ata_params));
		    }
		}
	    }
	    kfree(children, M_TEMP);
	    error = 0;
	}
	else
	    error = ENODEV;
	break;

    default:
	if (ata_raid_ioctl_func)
	    error = ata_raid_ioctl_func(ap->a_cmd, ap->a_data);
    }
    return error;
}

static int
le_lebuffer_attach(device_t dev)
{
	struct le_lebuffer_softc *lesc;
	struct lance_softc *sc;
	int error;

	lesc = device_get_softc(dev);
	sc = &lesc->sc_am7990.lsc;

	LE_LOCK_INIT(sc, device_get_nameunit(dev));

	/*
	 * The "register space" of the parent is just a buffer where the
	 * the LANCE descriptor rings and the RX/TX buffers can be stored.
	 */
	lesc->sc_brid = 0;
	lesc->sc_bres = bus_alloc_resource_any(device_get_parent(dev),
	    SYS_RES_MEMORY, &lesc->sc_brid, RF_ACTIVE);
	if (lesc->sc_bres == NULL) {
		device_printf(dev, "cannot allocate LANCE buffer\n");
		error = ENXIO;
		goto fail_mtx;
	}
	lesc->sc_buft = rman_get_bustag(lesc->sc_bres);
	lesc->sc_bufh = rman_get_bushandle(lesc->sc_bres);

	/* Allocate LANCE registers. */
	lesc->sc_rrid = 0;
	lesc->sc_rres = bus_alloc_resource_any(dev, SYS_RES_MEMORY,
	    &lesc->sc_rrid, RF_ACTIVE);
	if (lesc->sc_rres == NULL) {
		device_printf(dev, "cannot allocate LANCE registers\n");
		error = ENXIO;
		goto fail_bres;
	}
	lesc->sc_regt = rman_get_bustag(lesc->sc_rres);
	lesc->sc_regh = rman_get_bushandle(lesc->sc_rres);

	/* Allocate LANCE interrupt. */
	lesc->sc_irid = 0;
	if ((lesc->sc_ires = bus_alloc_resource_any(dev, SYS_RES_IRQ,
	    &lesc->sc_irid, RF_SHAREABLE | RF_ACTIVE)) == NULL) {
		device_printf(dev, "cannot allocate interrupt\n");
		error = ENXIO;
		goto fail_rres;
	}

	/*
	 * LANCE view is offset by buffer location.
	 * Note that we don't use sc->sc_mem.
	 */
	sc->sc_addr = 0;
	sc->sc_memsize = rman_get_size(lesc->sc_bres);
	sc->sc_flags = 0;

	/* That old black magic... */
	if (OF_getprop(ofw_bus_get_node(dev), "busmaster-regval",
	    &sc->sc_conf3, sizeof(sc->sc_conf3)) == -1)
		sc->sc_conf3 = LE_C3_ACON | LE_C3_BCON;
	/*
	 * Make sure LE_C3_BSWP is cleared so that for cards where
	 * that flag actually works le_lebuffer_copy{from,to}buf()
	 * don't fail...
	 */
	sc->sc_conf3 &= ~LE_C3_BSWP;

	OF_getetheraddr(dev, sc->sc_enaddr);

	sc->sc_copytodesc = le_lebuffer_copytodesc;
	sc->sc_copyfromdesc = le_lebuffer_copyfromdesc;
	sc->sc_copytobuf = le_lebuffer_copytobuf;
	sc->sc_copyfrombuf = le_lebuffer_copyfrombuf;
	sc->sc_zerobuf = le_lebuffer_zerobuf;

	sc->sc_rdcsr = le_lebuffer_rdcsr;
	sc->sc_wrcsr = le_lebuffer_wrcsr;
	sc->sc_hwreset = NULL;
	sc->sc_hwinit = NULL;
	sc->sc_hwintr = NULL;
	sc->sc_nocarrier = NULL;
	sc->sc_mediachange = NULL;
	sc->sc_mediastatus = NULL;
	sc->sc_supmedia = le_lebuffer_media;
	sc->sc_nsupmedia = NLEMEDIA;
	sc->sc_defaultmedia = le_lebuffer_media[0];

	error = am7990_config(&lesc->sc_am7990, device_get_name(dev),
	    device_get_unit(dev));
	if (error != 0) {
		device_printf(dev, "cannot attach Am7990\n");
		goto fail_ires;
	}

	error = bus_setup_intr(dev, lesc->sc_ires, INTR_TYPE_NET | INTR_MPSAFE,
	    NULL, am7990_intr, sc, &lesc->sc_ih);
	if (error != 0) {
		device_printf(dev, "cannot set up interrupt\n");
		goto fail_am7990;
	}
//.........这里部分代码省略.........