C++ pci_conf_read函数代码示例

static void
sii3114_chip_map(struct pciide_softc *sc, struct pci_attach_args *pa)
{
	struct pciide_channel *cp;
	pcireg_t scs_cmd;
	pci_intr_handle_t intrhandle;
	const char *intrstr;
	int channel;

	if (pciide_chipen(sc, pa) == 0)
		return;

#define	SII3114_RESET_BITS						\
	(SCS_CMD_PBM_RESET | SCS_CMD_ARB_RESET |			\
	 SCS_CMD_FF1_RESET | SCS_CMD_FF0_RESET |			\
	 SCS_CMD_FF3_RESET | SCS_CMD_FF2_RESET |			\
	 SCS_CMD_IDE1_RESET | SCS_CMD_IDE0_RESET |			\
	 SCS_CMD_IDE3_RESET | SCS_CMD_IDE2_RESET)

	/*
	 * Reset everything and then unblock all of the interrupts.
	 */
	scs_cmd = pci_conf_read(pa->pa_pc, pa->pa_tag, SII3112_SCS_CMD);
	pci_conf_write(pa->pa_pc, pa->pa_tag, SII3112_SCS_CMD,
		       scs_cmd | SII3114_RESET_BITS);
	delay(50 * 1000);
	pci_conf_write(pa->pa_pc, pa->pa_tag, SII3112_SCS_CMD,
		       scs_cmd & SCS_CMD_M66EN);
	delay(50 * 1000);

	/*
	 * On the 3114, the BA5 register space is always enabled.  In
	 * order to use the 3114 in any sane way, we must use this BA5
	 * register space, and so we consider it an error if we cannot
	 * map it.
	 *
	 * As a consequence of using BA5, our register mapping is different
	 * from a normal PCI IDE controller's, and so we are unable to use
	 * most of the common PCI IDE register mapping functions.
	 */
	if (pci_mapreg_map(pa, PCI_MAPREG_START + 0x14,
			   PCI_MAPREG_TYPE_MEM|
			   PCI_MAPREG_MEM_TYPE_32BIT, 0,
			   &sc->sc_ba5_st, &sc->sc_ba5_sh,
			   NULL, NULL) != 0) {
		aprint_error("%s: unable to map SATALink BA5 "
		    "register space\n", sc->sc_wdcdev.sc_dev.dv_xname);
		return;
	}
	sc->sc_ba5_en = 1;

	aprint_verbose("%s: %dMHz PCI bus\n", sc->sc_wdcdev.sc_dev.dv_xname,
	    (scs_cmd & SCS_CMD_M66EN) ? 66 : 33);

	/*
	 * Set the Interrupt Steering bit in the IDEDMA_CMD register of
	 * channel 2.  This is required at all times for proper operation
	 * when using the BA5 register space (otherwise interrupts from
	 * all 4 channels won't work).
	 */
	BA5_WRITE_4(sc, 2, ba5_IDEDMA_CMD, IDEDMA_CMD_INT_STEER);

	aprint_normal("%s: bus-master DMA support present",
	    sc->sc_wdcdev.sc_dev.dv_xname);
	sii3114_mapreg_dma(sc, pa);
	aprint_normal("\n");

	sc->sc_wdcdev.cap |= WDC_CAPABILITY_DATA16 | WDC_CAPABILITY_DATA32 |
	    WDC_CAPABILITY_MODE;
	sc->sc_wdcdev.PIO_cap = 4;
	if (sc->sc_dma_ok) {
		sc->sc_wdcdev.cap |= WDC_CAPABILITY_DMA | WDC_CAPABILITY_UDMA;
		sc->sc_wdcdev.cap |= WDC_CAPABILITY_IRQACK;
		sc->sc_wdcdev.irqack = pciide_irqack;
		sc->sc_wdcdev.DMA_cap = 2;
		sc->sc_wdcdev.UDMA_cap = 6;
	}
	sc->sc_wdcdev.set_modes = sii3112_setup_channel;

	/* We can use SControl and SStatus to probe for drives. */
	sc->sc_wdcdev.drv_probe = sii3112_drv_probe;

	sc->sc_wdcdev.channels = sc->wdc_chanarray;
	sc->sc_wdcdev.nchannels = 4;

	/* Map and establish the interrupt handler. */
	if (pci_intr_map(pa, &intrhandle) != 0) {
		aprint_error("%s: couldn't map native-PCI interrupt\n",
		    sc->sc_wdcdev.sc_dev.dv_xname);
		return;
	}
	intrstr = pci_intr_string(pa->pa_pc, intrhandle);
	sc->sc_pci_ih = pci_intr_establish(pa->pa_pc, intrhandle, IPL_BIO,
					   /* XXX */
					   pciide_pci_intr, sc);
	if (sc->sc_pci_ih != NULL) {
		aprint_normal("%s: using %s for native-PCI interrupt\n",
			      sc->sc_wdcdev.sc_dev.dv_xname,
			      intrstr ? intrstr : "unknown interrupt");
	} else {
//.........这里部分代码省略.........

int
pci_probe_device(struct pci_softc *sc, pcitag_t tag,
    int (*match)(const struct pci_attach_args *),
    struct pci_attach_args *pap)
{
	pci_chipset_tag_t pc = sc->sc_pc;
	struct pci_attach_args pa;
	pcireg_t id, /* csr, */ pciclass, intr, bhlcr, bar, endbar;
#ifdef __HAVE_PCI_MSI_MSIX
	pcireg_t cap;
	int off;
#endif
	int ret, pin, bus, device, function, i, width;
	int locs[PCICF_NLOCS];

	pci_decompose_tag(pc, tag, &bus, &device, &function);

	/* a driver already attached? */
	if (sc->PCI_SC_DEVICESC(device, function).c_dev != NULL && !match)
		return 0;

	bhlcr = pci_conf_read(pc, tag, PCI_BHLC_REG);
	if (PCI_HDRTYPE_TYPE(bhlcr) > 2)
		return 0;

	id = pci_conf_read(pc, tag, PCI_ID_REG);
	/* csr = pci_conf_read(pc, tag, PCI_COMMAND_STATUS_REG); */
	pciclass = pci_conf_read(pc, tag, PCI_CLASS_REG);

	/* Invalid vendor ID value? */
	if (PCI_VENDOR(id) == PCI_VENDOR_INVALID)
		return 0;
	/* XXX Not invalid, but we've done this ~forever. */
	if (PCI_VENDOR(id) == 0)
		return 0;

	/* Collect memory range info */
	memset(sc->PCI_SC_DEVICESC(device, function).c_range, 0,
	    sizeof(sc->PCI_SC_DEVICESC(device, function).c_range));
	i = 0;
	switch (PCI_HDRTYPE_TYPE(bhlcr)) {
	case PCI_HDRTYPE_PPB:
		endbar = PCI_MAPREG_PPB_END;
		break;
	case PCI_HDRTYPE_PCB:
		endbar = PCI_MAPREG_PCB_END;
		break;
	default:
		endbar = PCI_MAPREG_END;
		break;
	}
	for (bar = PCI_MAPREG_START; bar < endbar; bar += width) {
		struct pci_range *r;
		pcireg_t type;

		width = 4;
		if (pci_mapreg_probe(pc, tag, bar, &type) == 0)
			continue;

		if (PCI_MAPREG_TYPE(type) == PCI_MAPREG_TYPE_MEM) {
			if (PCI_MAPREG_MEM_TYPE(type) ==
			    PCI_MAPREG_MEM_TYPE_64BIT)
				width = 8;

			r = &sc->PCI_SC_DEVICESC(device, function).c_range[i++];
			if (pci_mapreg_info(pc, tag, bar, type,
			    &r->r_offset, &r->r_size, &r->r_flags) != 0)
				break;
			if ((PCI_VENDOR(id) == PCI_VENDOR_ATI) && (bar == 0x10)
			    && (r->r_size == 0x1000000)) {
				struct pci_range *nr;
				/*
				 * this has to be a mach64
				 * split things up so each half-aperture can
				 * be mapped PREFETCHABLE except the last page
				 * which may contain registers
				 */
				r->r_size = 0x7ff000;
				r->r_flags = BUS_SPACE_MAP_LINEAR |
					     BUS_SPACE_MAP_PREFETCHABLE;
				nr = &sc->PCI_SC_DEVICESC(device,
				    function).c_range[i++];
				nr->r_offset = r->r_offset + 0x800000;
				nr->r_size = 0x7ff000;
				nr->r_flags = BUS_SPACE_MAP_LINEAR |
					      BUS_SPACE_MAP_PREFETCHABLE;
			}
			
		}
	}

	pa.pa_iot = sc->sc_iot;
	pa.pa_memt = sc->sc_memt;
	pa.pa_dmat = sc->sc_dmat;
	pa.pa_dmat64 = sc->sc_dmat64;
	pa.pa_pc = pc;
	pa.pa_bus = bus;
	pa.pa_device = device;
	pa.pa_function = function;
	pa.pa_tag = tag;
//.........这里部分代码省略.........

static void
auacer_attach(struct device *parent, struct device *self, void *aux)
{
	struct auacer_softc *sc;
	struct pci_attach_args *pa;
	pci_intr_handle_t ih;
	bus_size_t aud_size;
	pcireg_t v;
	const char *intrstr;
	int i;

	sc = (struct auacer_softc *)self;
	pa = aux;
	aprint_normal(": Acer Labs M5455 Audio controller\n");

	if (pci_mapreg_map(pa, 0x10, PCI_MAPREG_TYPE_IO, 0, &sc->iot,
		&sc->aud_ioh, NULL, &aud_size)) {
		aprint_error(": can't map i/o space\n");
		return;
	}

	sc->sc_pc = pa->pa_pc;
	sc->sc_pt = pa->pa_tag;
	sc->dmat = pa->pa_dmat;

	sc->sc_dmamap_flags = BUS_DMA_COHERENT;	/* XXX remove */

	/* enable bus mastering */
	v = pci_conf_read(pa->pa_pc, pa->pa_tag, PCI_COMMAND_STATUS_REG);
	pci_conf_write(pa->pa_pc, pa->pa_tag, PCI_COMMAND_STATUS_REG,
	    v | PCI_COMMAND_MASTER_ENABLE);

	/* Map and establish the interrupt. */
	if (pci_intr_map(pa, &ih)) {
		aprint_error_dev(&sc->sc_dev, "can't map interrupt\n");
		return;
	}
	intrstr = pci_intr_string(pa->pa_pc, ih);
	sc->sc_ih = pci_intr_establish(pa->pa_pc, ih, IPL_AUDIO,
	    auacer_intr, sc);
	if (sc->sc_ih == NULL) {
		aprint_error_dev(&sc->sc_dev, "can't establish interrupt");
		if (intrstr != NULL)
			aprint_normal(" at %s", intrstr);
		aprint_normal("\n");
		return;
	}
	aprint_normal_dev(&sc->sc_dev, "interrupting at %s\n", intrstr);

	strlcpy(sc->sc_audev.name, "M5455 AC97", MAX_AUDIO_DEV_LEN);
	snprintf(sc->sc_audev.version, MAX_AUDIO_DEV_LEN,
		 "0x%02x", PCI_REVISION(pa->pa_class));
	strlcpy(sc->sc_audev.config, device_xname(&sc->sc_dev), MAX_AUDIO_DEV_LEN);

	/* Set up DMA lists. */
	auacer_alloc_cdata(sc);
	sc->sc_pcmo.dmalist = sc->sc_cdata->ic_dmalist_pcmo;
	sc->sc_pcmo.ptr = 0;
	sc->sc_pcmo.port = ALI_BASE_PO;

	DPRINTF(ALI_DEBUG_DMA, ("auacer_attach: lists %p\n",
	    sc->sc_pcmo.dmalist));

	sc->host_if.arg = sc;
	sc->host_if.attach = auacer_attach_codec;
	sc->host_if.read = auacer_read_codec;
	sc->host_if.write = auacer_write_codec;
	sc->host_if.reset = auacer_reset_codec;

	if (ac97_attach(&sc->host_if, self) != 0)
		return;

	/* setup audio_format */
	memcpy(sc->sc_formats, auacer_formats, sizeof(auacer_formats));
	if (!AC97_IS_4CH(sc->codec_if))
		AUFMT_INVALIDATE(&sc->sc_formats[AUACER_FORMATS_4CH]);
	if (!AC97_IS_6CH(sc->codec_if))
		AUFMT_INVALIDATE(&sc->sc_formats[AUACER_FORMATS_6CH]);
	if (AC97_IS_FIXED_RATE(sc->codec_if)) {
		for (i = 0; i < AUACER_NFORMATS; i++) {
			sc->sc_formats[i].frequency_type = 1;
			sc->sc_formats[i].frequency[0] = 48000;
		}
	}

	if (0 != auconv_create_encodings(sc->sc_formats, AUACER_NFORMATS,
					 &sc->sc_encodings)) {
		return;
	}

	audio_attach_mi(&auacer_hw_if, sc, &sc->sc_dev);

	auacer_reset(sc);

	if (!pmf_device_register(self, NULL, auacer_resume))
		aprint_error_dev(self, "couldn't establish power handler\n");
}

static void
acer_setup_channel(struct ata_channel *chp)
{
	struct ata_drive_datas *drvp;
	int drive, s;
	u_int32_t acer_fifo_udma;
	u_int32_t idedma_ctl;
	struct pciide_channel *cp = (struct pciide_channel*)chp;
	struct pciide_softc *sc = CHAN_TO_PCIIDE(chp);

	idedma_ctl = 0;
	acer_fifo_udma = pci_conf_read(sc->sc_pc, sc->sc_tag, ACER_FTH_UDMA);
	ATADEBUG_PRINT(("acer_setup_channel: old fifo/udma reg 0x%x\n",
	    acer_fifo_udma), DEBUG_PROBE);
	/* setup DMA if needed */
	pciide_channel_dma_setup(cp);

	if ((chp->ch_drive[0].drive_flags | chp->ch_drive[1].drive_flags) &
	    ATA_DRIVE_UDMA) { /* check 80 pins cable */
		if (pciide_pci_read(sc->sc_pc, sc->sc_tag, ACER_0x4A) &
		    ACER_0x4A_80PIN(chp->ch_channel)) {
			if (chp->ch_drive[0].UDMA_mode > 2)
				chp->ch_drive[0].UDMA_mode = 2;
			if (chp->ch_drive[1].UDMA_mode > 2)
				chp->ch_drive[1].UDMA_mode = 2;
		}
	}

	for (drive = 0; drive < 2; drive++) {
		drvp = &chp->ch_drive[drive];
		/* If no drive, skip */
		if (drvp->drive_type == ATA_DRIVET_NONE)
			continue;
		ATADEBUG_PRINT(("acer_setup_channel: old timings reg for "
		    "channel %d drive %d 0x%x\n", chp->ch_channel, drive,
		    pciide_pci_read(sc->sc_pc, sc->sc_tag,
		    ACER_IDETIM(chp->ch_channel, drive))), DEBUG_PROBE);
		/* clear FIFO/DMA mode */
		acer_fifo_udma &= ~(ACER_FTH_OPL(chp->ch_channel, drive, 0x3) |
		    ACER_UDMA_EN(chp->ch_channel, drive) |
		    ACER_UDMA_TIM(chp->ch_channel, drive, 0x7));

		/* add timing values, setup DMA if needed */
		if ((drvp->drive_flags & ATA_DRIVE_DMA) == 0 &&
		    (drvp->drive_flags & ATA_DRIVE_UDMA) == 0) {
			acer_fifo_udma |=
			    ACER_FTH_OPL(chp->ch_channel, drive, 0x1);
			goto pio;
		}

		acer_fifo_udma |= ACER_FTH_OPL(chp->ch_channel, drive, 0x2);
		if (drvp->drive_flags & ATA_DRIVE_UDMA) {
			/* use Ultra/DMA */
			s = splbio();
			drvp->drive_flags &= ~ATA_DRIVE_DMA;
			splx(s);
			acer_fifo_udma |= ACER_UDMA_EN(chp->ch_channel, drive);
			acer_fifo_udma |=
			    ACER_UDMA_TIM(chp->ch_channel, drive,
				acer_udma[drvp->UDMA_mode]);
			/* XXX disable if one drive < UDMA3 ? */
			if (drvp->UDMA_mode >= 3) {
				pciide_pci_write(sc->sc_pc, sc->sc_tag,
				    ACER_0x4B,
				    pciide_pci_read(sc->sc_pc, sc->sc_tag,
					ACER_0x4B) | ACER_0x4B_UDMA66);
			}
		} else {
			/*
			 * use Multiword DMA
			 * Timings will be used for both PIO and DMA,
			 * so adjust DMA mode if needed
			 */
			if (drvp->PIO_mode > (drvp->DMA_mode + 2))
				drvp->PIO_mode = drvp->DMA_mode + 2;
			if (drvp->DMA_mode + 2 > (drvp->PIO_mode))
				drvp->DMA_mode = (drvp->PIO_mode > 2) ?
				    drvp->PIO_mode - 2 : 0;
			if (drvp->DMA_mode == 0)
				drvp->PIO_mode = 0;
		}
		idedma_ctl |= IDEDMA_CTL_DRV_DMA(drive);
pio:		pciide_pci_write(sc->sc_pc, sc->sc_tag,
		    ACER_IDETIM(chp->ch_channel, drive),
		    acer_pio[drvp->PIO_mode]);
	}
	ATADEBUG_PRINT(("acer_setup_channel: new fifo/udma reg 0x%x\n",
	    acer_fifo_udma), DEBUG_PROBE);
	pci_conf_write(sc->sc_pc, sc->sc_tag, ACER_FTH_UDMA, acer_fifo_udma);
	if (idedma_ctl != 0) {
		/* Add software bits in status register */
		bus_space_write_1(sc->sc_dma_iot, cp->dma_iohs[IDEDMA_CTL], 0,
		    idedma_ctl);
	}
}

static void
epic_pci_attach(device_t parent, device_t self, void *aux)
{
	struct epic_pci_softc *psc = device_private(self);
	struct epic_softc *sc = &psc->sc_epic;
	struct pci_attach_args *pa = aux;
	pci_chipset_tag_t pc = pa->pa_pc;
	pci_intr_handle_t ih;
	const char *intrstr = NULL;
	const struct epic_pci_product *epp;
	const struct epic_pci_subsys_info *esp;
	bus_space_tag_t iot, memt;
	bus_space_handle_t ioh, memh;
	int ioh_valid, memh_valid;
	int error;

	sc->sc_dev = self;

	epp = epic_pci_lookup(pa);
	if (epp == NULL) {
		aprint_normal("\n");
		panic("%s: impossible", __func__);
	}

	pci_aprint_devinfo_fancy(pa, "Ethernet controller", epp->epp_name, 1);

	/* power up chip */
	if ((error = pci_activate(pa->pa_pc, pa->pa_tag, self,
	    NULL)) && error != EOPNOTSUPP) {
		aprint_error_dev(self, "cannot activate %d\n", error);
		return;
	}

	/*
	 * Map the device.
	 */
	ioh_valid = (pci_mapreg_map(pa, EPIC_PCI_IOBA,
	    PCI_MAPREG_TYPE_IO, 0,
	    &iot, &ioh, NULL, NULL) == 0);
	memh_valid = (pci_mapreg_map(pa, EPIC_PCI_MMBA,
	    PCI_MAPREG_TYPE_MEM|PCI_MAPREG_MEM_TYPE_32BIT, 0,
	    &memt, &memh, NULL, NULL) == 0);

	if (memh_valid) {
		sc->sc_st = memt;
		sc->sc_sh = memh;
	} else if (ioh_valid) {
		sc->sc_st = iot;
		sc->sc_sh = ioh;
	} else {
		aprint_error_dev(self, "unable to map device registers\n");
		return;
	}

	sc->sc_dmat = pa->pa_dmat;

	/* Make sure bus mastering is enabled. */
	pci_conf_write(pc, pa->pa_tag, PCI_COMMAND_STATUS_REG,
	    pci_conf_read(pc, pa->pa_tag, PCI_COMMAND_STATUS_REG) |
	    PCI_COMMAND_MASTER_ENABLE);

	/*
	 * Map and establish our interrupt.
	 */
	if (pci_intr_map(pa, &ih)) {
		aprint_error_dev(self, "unable to map interrupt\n");
		return;
	}
	intrstr = pci_intr_string(pc, ih);
	psc->sc_ih = pci_intr_establish(pc, ih, IPL_NET, epic_intr, sc);
	if (psc->sc_ih == NULL) {
		aprint_error_dev(self, "unable to establish interrupt");
		if (intrstr != NULL)
			aprint_error(" at %s", intrstr);
		aprint_error("\n");
		return;
	}
	aprint_normal_dev(self, "interrupting at %s\n", intrstr);

	esp = epic_pci_subsys_lookup(pa);
	if (esp)
		sc->sc_hwflags = esp->flags;

	/*
	 * Finish off the attach.
	 */
	epic_attach(sc);
}

void
auvia_attach(struct device *parent, struct device *self, void *aux)
{
	struct pci_attach_args *pa = aux;
	struct auvia_softc *sc = (struct auvia_softc *) self;
	const char *intrstr = NULL;
	struct mixer_ctrl ctl;
	pci_chipset_tag_t pc = pa->pa_pc;
	pcitag_t pt = pa->pa_tag;
	pci_intr_handle_t ih;
	bus_size_t iosize;
	pcireg_t pr;
	int r, i;

	sc->sc_play.sc_base = AUVIA_PLAY_BASE;
	sc->sc_record.sc_base = AUVIA_RECORD_BASE;
	if (PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_VIATECH_VT8233_AC97) {
		sc->sc_flags |= AUVIA_FLAGS_VT8233;
		sc->sc_play.sc_base = VIA8233_MP_BASE;
		sc->sc_record.sc_base = VIA8233_WR_BASE;
	}

	if (pci_mapreg_map(pa, 0x10, PCI_MAPREG_TYPE_IO, 0, &sc->sc_iot,
	    &sc->sc_ioh, NULL, &iosize, 0)) {
		printf(": can't map i/o space\n");
		return;
	}

	sc->sc_dmat = pa->pa_dmat;
	sc->sc_pc = pc;
	sc->sc_pt = pt;

	if (pci_intr_map(pa, &ih)) {
		printf(": couldn't map interrupt\n");
		bus_space_unmap(sc->sc_iot, sc->sc_ioh, iosize);
		return;
	}
	intrstr = pci_intr_string(pc, ih);

	sc->sc_ih = pci_intr_establish(pc, ih, IPL_AUDIO, auvia_intr, sc,
	    sc->sc_dev.dv_xname);
	if (sc->sc_ih == NULL) {
		printf(": couldn't establish interrupt");
		if (intrstr != NULL)
			printf(" at %s", intrstr);
		printf("\n");
		bus_space_unmap(sc->sc_iot, sc->sc_ioh, iosize);
		return;
	}

	printf(": %s\n", intrstr);

	/* disable SBPro compat & others */
	pr = pci_conf_read(pc, pt, AUVIA_PCICONF_JUNK);

	pr &= ~AUVIA_PCICONF_ENABLES; /* clear compat function enables */
	/* XXX what to do about MIDI, FM, joystick? */

	pr |= (AUVIA_PCICONF_ACLINKENAB | AUVIA_PCICONF_ACNOTRST |
	    AUVIA_PCICONF_ACVSR | AUVIA_PCICONF_ACSGD);

	pr &= ~(AUVIA_PCICONF_ACFM | AUVIA_PCICONF_ACSB);

	pci_conf_write(pc, pt, AUVIA_PCICONF_JUNK, pr);
	sc->sc_pci_junk = pr;

	sc->host_if.arg = sc;
	sc->host_if.attach = auvia_attach_codec;
	sc->host_if.read = auvia_read_codec;
	sc->host_if.write = auvia_write_codec;
	sc->host_if.reset = auvia_reset_codec;
	sc->host_if.spdif_event = auvia_spdif_event;

	if ((r = ac97_attach(&sc->host_if)) != 0) {
		printf("%s: can't attach codec (error 0x%X)\n",
		    sc->sc_dev.dv_xname, r);
		pci_intr_disestablish(pc, sc->sc_ih);
		bus_space_unmap(sc->sc_iot, sc->sc_ioh, iosize);
		return;
	}

	/* disable mutes */
	for (i = 0; i < 4; i++) {
		static struct {
			char *class, *device;
		} d[] = {
			{ AudioCoutputs, AudioNmaster},
			{ AudioCinputs, AudioNdac},
			{ AudioCinputs, AudioNcd},
			{ AudioCrecord, AudioNvolume},
		};

		ctl.type = AUDIO_MIXER_ENUM;
		ctl.un.ord = 0;

		ctl.dev = sc->codec_if->vtbl->get_portnum_by_name(sc->codec_if,
		    d[i].class, d[i].device, AudioNmute);
		auvia_set_port(sc, &ctl);
	}

//.........这里部分代码省略.........

void
pciaddr_resource_manage(struct shpcic_softc *sc, pci_chipset_tag_t pc,
    pcitag_t tag, pciaddr_resource_manage_func_t func)
{
	struct extent *ex;
	pcireg_t val, mask;
	bus_addr_t addr;
	bus_size_t size;
	int error, mapreg, type, reg_start, reg_end, width;

	val = pci_conf_read(pc, tag, PCI_BHLC_REG);
	switch (PCI_HDRTYPE_TYPE(val)) {
	default:
		printf("WARNING: unknown PCI device header.\n");
		sc->nbogus++;
		return;
	case 0: 
		reg_start = PCI_MAPREG_START;
		reg_end   = PCI_MAPREG_END;
		break;
	case 1: /* PCI-PCI bridge */
		reg_start = PCI_MAPREG_START;
		reg_end   = PCI_MAPREG_PPB_END;
		break;
	case 2: /* PCI-CardBus bridge */
		reg_start = PCI_MAPREG_START;
		reg_end   = PCI_MAPREG_PCB_END;
		break;
	}
	error = 0;
    
	for (mapreg = reg_start; mapreg < reg_end; mapreg += width) {
		/* inquire PCI device bus space requirement */
		val = pci_conf_read(pc, tag, mapreg);
		pci_conf_write(pc, tag, mapreg, ~0);

		mask = pci_conf_read(pc, tag, mapreg);
		pci_conf_write(pc, tag, mapreg, val);
	
		type = PCI_MAPREG_TYPE(val);
		width = 4;
		if (type == PCI_MAPREG_TYPE_MEM) {
			if (PCI_MAPREG_MEM_TYPE(val) == 
			    PCI_MAPREG_MEM_TYPE_64BIT) {
				/* XXX We could examine the upper 32 bits
				 * XXX of the BAR here, but we are totally 
				 * XXX unprepared to handle a non-zero value, 
				 * XXX either here or anywhere else in 
				 * XXX i386-land. 
				 * XXX So just arrange to not look at the
				 * XXX upper 32 bits, lest we misinterpret
				 * XXX it as a 32-bit BAR set to zero. 
				 */
			    width = 8;
			}
			addr = PCI_MAPREG_MEM_ADDR(val);
			size = PCI_MAPREG_MEM_SIZE(mask);
			ex = sc->extent_mem;
			/* XXX */
			/*
			 * sh-IPL allocates a low address for PCI memory
			 * on px-eh systems, clobber it so it gets 'remapped'
			 */
			if (addr != 0 && addr < sc->sc_membus_space.bus_base) {
				val = 0;
				pci_conf_write(pc, tag, mapreg, val);
			}
		} else {
			/* XXX some devices give 32bit value */
			if (sc->sc_iobus_space.bus_base != PCIADDR_PORT_START) {
				/*
				 * if the bus base is not 0 skew all addresses
				 */
				val &= PCIADDR_PORT_END;
				val |= sc->sc_iobus_space.bus_base;
				pci_conf_write(pc, tag, mapreg, val);
			}
			addr = PCI_MAPREG_IO_ADDR(val);
			size = PCI_MAPREG_IO_SIZE(mask);
			ex = sc->extent_port;
		}
	
		if (!size) /* unused register */
			continue;

		/* reservation/allocation phase */
		error += (*func) (sc, pc, tag, mapreg, ex, type, &addr, size);

		PCIBIOS_PRINTV(("\t%02xh %s 0x%08x 0x%08x\n", 
				mapreg, type ? "port" : "mem ", 
				(unsigned int)addr, (unsigned int)size));
	}
    
	if (error)
		sc->nbogus++;

	PCIBIOS_PRINTV(("\t\t[%s]\n", error ? "NG" : "OK"));
}

static void
ste_attach(device_t parent, device_t self, void *aux)
{
	struct ste_softc *sc = device_private(self);
	struct pci_attach_args *pa = aux;
	struct ifnet *ifp = &sc->sc_ethercom.ec_if;
	pci_chipset_tag_t pc = pa->pa_pc;
	pci_intr_handle_t ih;
	const char *intrstr = NULL;
	bus_space_tag_t iot, memt;
	bus_space_handle_t ioh, memh;
	bus_dma_segment_t seg;
	int ioh_valid, memh_valid;
	int i, rseg, error;
	const struct ste_product *sp;
	uint8_t enaddr[ETHER_ADDR_LEN];
	uint16_t myea[ETHER_ADDR_LEN / 2];

	callout_init(&sc->sc_tick_ch, 0);

	sp = ste_lookup(pa);
	if (sp == NULL) {
		printf("\n");
		panic("ste_attach: impossible");
	}

	printf(": %s\n", sp->ste_name);

	/*
	 * Map the device.
	 */
	ioh_valid = (pci_mapreg_map(pa, STE_PCI_IOBA,
	    PCI_MAPREG_TYPE_IO, 0,
	    &iot, &ioh, NULL, NULL) == 0);
	memh_valid = (pci_mapreg_map(pa, STE_PCI_MMBA,
	    PCI_MAPREG_TYPE_MEM|PCI_MAPREG_MEM_TYPE_32BIT, 0,
	    &memt, &memh, NULL, NULL) == 0);

	if (memh_valid) {
		sc->sc_st = memt;
		sc->sc_sh = memh;
	} else if (ioh_valid) {
		sc->sc_st = iot;
		sc->sc_sh = ioh;
	} else {
		aprint_error_dev(&sc->sc_dev, "unable to map device registers\n");
		return;
	}

	sc->sc_dmat = pa->pa_dmat;

	/* Enable bus mastering. */
	pci_conf_write(pc, pa->pa_tag, PCI_COMMAND_STATUS_REG,
	    pci_conf_read(pc, pa->pa_tag, PCI_COMMAND_STATUS_REG) |
	    PCI_COMMAND_MASTER_ENABLE);

	/* power up chip */
	if ((error = pci_activate(pa->pa_pc, pa->pa_tag, self,
	    NULL)) && error != EOPNOTSUPP) {
		aprint_error_dev(&sc->sc_dev, "cannot activate %d\n",
		    error);
		return;
	}

	/*
	 * Map and establish our interrupt.
	 */
	if (pci_intr_map(pa, &ih)) {
		aprint_error_dev(&sc->sc_dev, "unable to map interrupt\n");
		return;
	}
	intrstr = pci_intr_string(pc, ih);
	sc->sc_ih = pci_intr_establish(pc, ih, IPL_NET, ste_intr, sc);
	if (sc->sc_ih == NULL) {
		aprint_error_dev(&sc->sc_dev, "unable to establish interrupt");
		if (intrstr != NULL)
			printf(" at %s", intrstr);
		printf("\n");
		return;
	}
	printf("%s: interrupting at %s\n", device_xname(&sc->sc_dev), intrstr);

	/*
	 * Allocate the control data structures, and create and load the
	 * DMA map for it.
	 */
	if ((error = bus_dmamem_alloc(sc->sc_dmat,
	    sizeof(struct ste_control_data), PAGE_SIZE, 0, &seg, 1, &rseg,
	    0)) != 0) {
		aprint_error_dev(&sc->sc_dev, "unable to allocate control data, error = %d\n",
		    error);
		goto fail_0;
	}

	if ((error = bus_dmamem_map(sc->sc_dmat, &seg, rseg,
	    sizeof(struct ste_control_data), (void **)&sc->sc_control_data,
	    BUS_DMA_COHERENT)) != 0) {
		aprint_error_dev(&sc->sc_dev, "unable to map control data, error = %d\n",
		    error);
		goto fail_1;
//.........这里部分代码省略.........

static void
coram_attach(device_t parent, device_t self, void *aux)
{
	struct coram_softc *sc = device_private(self);
	const struct pci_attach_args *pa = aux;
	pci_intr_handle_t ih;
	pcireg_t reg;
	const char *intrstr;
	struct coram_iic_softc *cic;
	uint32_t value;
	int i;
#ifdef CORAM_ATTACH_I2C
	struct i2cbus_attach_args iba;
#endif

	sc->sc_dev = self;

	pci_aprint_devinfo(pa, NULL);

	reg = pci_conf_read(pa->pa_pc, pa->pa_tag, PCI_SUBSYS_ID_REG);
	sc->sc_board = coram_board_lookup(PCI_VENDOR(reg), PCI_PRODUCT(reg));
	KASSERT(sc->sc_board != NULL);

	if (pci_mapreg_map(pa, CX23885_MMBASE, PCI_MAPREG_TYPE_MEM, 0,
			   &sc->sc_memt, &sc->sc_memh, NULL, &sc->sc_mems)) {
		aprint_error_dev(self, "couldn't map memory space\n");
		return;
	}

	sc->sc_dmat = pa->pa_dmat;
	sc->sc_pc = pa->pa_pc;

	if (pci_intr_map(pa, &ih)) {
		aprint_error_dev(self, "couldn't map interrupt\n");
		return;
	}
	intrstr = pci_intr_string(pa->pa_pc, ih);
	sc->sc_ih = pci_intr_establish(pa->pa_pc, ih, IPL_VM, coram_intr, self);
	if (sc->sc_ih == NULL) {
		aprint_error_dev(self, "couldn't establish interrupt");
		if (intrstr != NULL)
			aprint_error(" at %s", intrstr);
		aprint_error("\n");
		return;
	}
	aprint_normal_dev(self, "interrupting at %s\n", intrstr);

	/* set master */
	reg = pci_conf_read(pa->pa_pc, pa->pa_tag, PCI_COMMAND_STATUS_REG);
	reg |= PCI_COMMAND_MASTER_ENABLE;
	pci_conf_write(pa->pa_pc, pa->pa_tag, PCI_COMMAND_STATUS_REG, reg);

	/* I2C */
	for(i = 0; i < I2C_NUM; i++) {
		cic = &sc->sc_iic[i];

		cic->cic_sc = sc;
		if (bus_space_subregion(sc->sc_memt, sc->sc_memh,
		    I2C_BASE + (I2C_SIZE * i), I2C_SIZE, &cic->cic_regh))
			panic("failed to subregion i2c");

		mutex_init(&cic->cic_busmutex, MUTEX_DRIVER, IPL_NONE);
		cic->cic_i2c.ic_cookie = cic;
		cic->cic_i2c.ic_acquire_bus = coram_iic_acquire_bus;
		cic->cic_i2c.ic_release_bus = coram_iic_release_bus;
		cic->cic_i2c.ic_exec = coram_iic_exec;

#ifdef CORAM_ATTACH_I2C
		/* attach iic(4) */
		memset(&iba, 0, sizeof(iba));
		iba.iba_tag = &cic->cic_i2c;
		iba.iba_type = I2C_TYPE_SMBUS;
		cic->cic_i2cdev = config_found_ia(self, "i2cbus", &iba,
		    iicbus_print);
#endif
	}

	/* HVR1250 GPIO */
	value = bus_space_read_4(sc->sc_memt, sc->sc_memh, 0x110010);
#if 1
	value &= ~0x00010001;
	bus_space_write_4(sc->sc_memt, sc->sc_memh, 0x110010, value);
	delay(5000);
#endif
	value |= 0x00010001;
	bus_space_write_4(sc->sc_memt, sc->sc_memh, 0x110010, value);

#if 0
	int i;
	uint8_t foo[256];
	uint8_t bar;
	bar = 0;
//	seeprom_bootstrap_read(&sc->sc_i2c, 0x50, 0, 256, foo, 256);

	iic_acquire_bus(&sc->sc_i2c, I2C_F_POLL);
	iic_exec(&sc->sc_i2c, I2C_OP_READ_WITH_STOP, 0x50, &bar, 1, foo, 256,
	    I2C_F_POLL);
	iic_release_bus(&sc->sc_i2c, I2C_F_POLL);

	printf("\n");
//.........这里部分代码省略.........

void
gdium_attach_hook(device_t parent, device_t self,
    struct pcibus_attach_args *pba)
{
	pci_chipset_tag_t pc = pba->pba_pc;
	pcireg_t id;
	pcitag_t tag;
#ifdef notyet
	int bar;
#endif
#if 0
	pcireg_t reg;
	int dev, func;
#endif

	if (pba->pba_bus != 0)
		return;

#ifdef notyet
	/*
	 * Clear all BAR of the mini PCI slot; PMON did not initialize
	 * it, and we do not want it to conflict with anything.
	 */
	tag = pci_make_tag(pc, 0, 13, 0);
	for (bar = PCI_MAPREG_START; bar < PCI_MAPREG_END; bar += 4)
		pci_conf_write(pc, tag, bar, 0);
#else
	/*
	 * Force a non conflicting BAR for the wireless controller,
	 * until proper resource configuration code is added to
	 * bonito (work in progress).
	 */
	tag = pci_make_tag(pc, 0, 13, 0);
	pci_conf_write(pc, tag, PCI_MAPREG_START, 0x06228000);
#endif

	/*
	 * Figure out which motherboard we are running on.
	 * Might not be good enough...
	 */
	tag = pci_make_tag(pc, 0, 17, 0);
	id = pci_conf_read(pc, tag, PCI_ID_REG);
	if (id == PCI_ID_CODE(PCI_VENDOR_NEC, PCI_PRODUCT_NEC_USB))
		gdium_revision = 1;
	
#if 0
	/*
	 * Tweak the usb controller capabilities.
	 */
	for (dev = pci_bus_maxdevs(pc, 0); dev >= 0; dev--) {
		tag = pci_make_tag(pc, 0, dev, 0);
		id = pci_conf_read(pc, tag, PCI_ID_REG);
		if (id != PCI_ID_CODE(PCI_VENDOR_NEC, PCI_PRODUCT_NEC_USB))
			continue;
		if (gdium_revision != 0) {
			reg = pci_conf_read(pc, tag, 0xe0);
			/* enable ports 1 and 2 */
			reg |= 0x00000003;
			pci_conf_write(pc, tag, 0xe0, reg);
		} else {
			for (func = 0; func < 2; func++) {
				tag = pci_make_tag(pc, 0, dev, func);
				id = pci_conf_read(pc, tag, PCI_ID_REG);
				if (PCI_VENDOR(id) != PCI_VENDOR_NEC)
					continue;
				if (PCI_PRODUCT(id) != PCI_PRODUCT_NEC_USB &&
				    PCI_PRODUCT(id) != PCI_PRODUCT_NEC_USB2)
					continue;

				reg = pci_conf_read(pc, tag, 0xe0);
				/* enable ports 1 and 3, disable port 2 */
				reg &= ~0x00000007;
				reg |= 0x00000005;
				pci_conf_write(pc, tag, 0xe0, reg);
				pci_conf_write(pc, tag, 0xe4, 0x00000020);
			}
		}
	}
#endif
}

static pciconf_bus_t *
query_bus(pciconf_bus_t *parent, pciconf_dev_t *pd, int dev)
{
	pciconf_bus_t	*pb;
	pcireg_t	busreg, io, pmem;
	pciconf_win_t	*pi, *pm;

	pb = malloc (sizeof (pciconf_bus_t), M_DEVBUF, M_NOWAIT);
	if (!pb)
		panic("Unable to allocate memory for PCI configuration.");

	pb->cacheline_size = parent->cacheline_size;
	pb->parent_bus = parent;
	alloc_busno(parent, pb);
	if (pci_conf_debug)
		printf("PCI bus bridge covers busses %d-%d\n",
			pb->busno, pb->last_busno);

	busreg  =  parent->busno << PCI_BRIDGE_BUS_PRIMARY_SHIFT;
	busreg |=      pb->busno << PCI_BRIDGE_BUS_SECONDARY_SHIFT;
	busreg |= pb->last_busno << PCI_BRIDGE_BUS_SUBORDINATE_SHIFT;
	pci_conf_write(parent->pc, pd->tag, PCI_BRIDGE_BUS_REG, busreg);

	pb->swiz = parent->swiz + dev;

	pb->ioext = NULL;
	pb->memext = NULL;
	pb->pmemext = NULL;
	pb->pc = parent->pc;
	pb->io_total = pb->mem_total = pb->pmem_total = 0;

	pb->io_32bit = 0;
	if (parent->io_32bit) {
		io = pci_conf_read(parent->pc, pd->tag, PCI_BRIDGE_STATIO_REG);
		if (PCI_BRIDGE_IO_32BITS(io)) {
			pb->io_32bit = 1;
		}
	}

	pb->pmem_64bit = 0;
	if (parent->pmem_64bit) {
		pmem = pci_conf_read(parent->pc, pd->tag,
		    PCI_BRIDGE_PREFETCHMEM_REG);
		if (PCI_BRIDGE_PREFETCHMEM_64BITS(pmem)) {
			pb->pmem_64bit = 1;
		}
	}

	if (probe_bus(pb)) {
		printf("Failed to probe bus %d\n", pb->busno);
		goto err;
	}

	if (pb->io_total > 0) {
		if (parent->niowin >= MAX_CONF_IO) {
			printf("pciconf: too many I/O windows\n");
			goto err;
		}
		pb->io_total |= 0xfff;	/* Round up */
		pi = get_io_desc(parent, pb->io_total);
		pi->dev = pd;
		pi->reg = 0;
		pi->size = pb->io_total;
		pi->align = 0x1000;	/* 4K alignment */
		pi->prefetch = 0;
		parent->niowin++;
		parent->io_total += pb->io_total;
	}

	if (pb->mem_total > 0) {
		if (parent->nmemwin >= MAX_CONF_MEM) {
			printf("pciconf: too many MEM windows\n");
			goto err;
		}
		pb->mem_total |= 0xfffff;	/* Round up */
		pm = get_mem_desc(parent, pb->mem_total);
		pm->dev = pd;
		pm->reg = 0;
		pm->size = pb->mem_total;
		pm->align = 0x100000;	/* 1M alignment */
		pm->prefetch = 0;
		parent->nmemwin++;
		parent->mem_total += pb->mem_total;
	}

	if (pb->pmem_total > 0) {
		if (parent->nmemwin >= MAX_CONF_MEM) {
			printf("pciconf: too many MEM windows\n");
			goto err;
		}
		pb->pmem_total |= 0xfffff;	/* Round up */
		pm = get_mem_desc(parent, pb->pmem_total);
		pm->dev = pd;
		pm->reg = 0;
		pm->size = pb->pmem_total;
		pm->align = 0x100000;		/* 1M alignment */
		pm->prefetch = 1;
		parent->nmemwin++;
		parent->pmem_total += pb->pmem_total;
	}
//.........这里部分代码省略.........

/*
 * Set up bus common stuff, then loop over devices & functions.
 * If we find something, call pci_do_device_query()).
 */
static int
probe_bus(pciconf_bus_t *pb)
{
	int device, maxdevs;
#ifdef __PCI_BUS_DEVORDER
	char devs[32];
	int  i;
#endif

	maxdevs = pci_bus_maxdevs(pb->pc, pb->busno);
	pb->ndevs = 0;
	pb->niowin = 0;
	pb->nmemwin = 0;
	pb->freq_66 = 1;
	pb->fast_b2b = 1;
	pb->prefetch = 1;
	pb->max_mingnt = 0;	/* we are looking for the maximum */
	pb->min_maxlat = 0x100;	/* we are looking for the minimum */
	pb->bandwidth_used = 0;

#ifdef __PCI_BUS_DEVORDER
	pci_bus_devorder(pb->pc, pb->busno, devs);
	for (i=0; (device=devs[i]) < 32 && device >= 0; i++) {
#else
	for (device=0; device < maxdevs; device++) {
#endif
		pcitag_t tag;
		pcireg_t id, bhlcr;
		int function, nfunction;
		int confmode;

		tag = pci_make_tag(pb->pc, pb->busno, device, 0);
		if (pci_conf_debug) {
			print_tag(pb->pc, tag);
		}
		id = pci_conf_read(pb->pc, tag, PCI_ID_REG);

		if (pci_conf_debug) {
			printf("id=%x: Vendor=%x, Product=%x\n",
			    id, PCI_VENDOR(id),PCI_PRODUCT(id));
		}
		/* Invalid vendor ID value? */
		if (PCI_VENDOR(id) == PCI_VENDOR_INVALID)
			continue;

		bhlcr = pci_conf_read(pb->pc, tag, PCI_BHLC_REG);
		nfunction = PCI_HDRTYPE_MULTIFN(bhlcr) ? 8 : 1;
		for (function = 0 ; function < nfunction ; function++) {
			tag = pci_make_tag(pb->pc, pb->busno, device, function);
			id = pci_conf_read(pb->pc, tag, PCI_ID_REG);
			if (PCI_VENDOR(id) == PCI_VENDOR_INVALID)
				continue;
			if (pb->ndevs+1 < MAX_CONF_DEV) {
				if (pci_conf_debug) {
					print_tag(pb->pc, tag);
					printf("Found dev 0x%04x 0x%04x -- "
					    "really probing.\n",
					PCI_VENDOR(id), PCI_PRODUCT(id));
				}
#ifdef __HAVE_PCI_CONF_HOOK
				confmode = pci_conf_hook(pb->pc, pb->busno,
				    device, function, id);
				if (confmode == 0)
					continue;
#else
				/*
				 * Don't enable expansion ROMS -- some cards
				 * share address decoders between the EXPROM
				 * and PCI memory space, and enabling the ROM
				 * when not needed will cause all sorts of
				 * lossage.
				 */
				confmode = PCI_CONF_ALL & ~PCI_CONF_MAP_ROM;
#endif
				if (pci_do_device_query(pb, tag, device,
				    function, confmode))
					return -1;
				pb->ndevs++;
			}
		}
	}
	return 0;
}

static void
alloc_busno(pciconf_bus_t *parent, pciconf_bus_t *pb)
{
	pb->busno = parent->next_busno;
	if (parent->next_busno + parent->busno_spacing > parent->last_busno)
		panic("Too many PCI busses on bus %d", parent->busno);
	parent->next_busno = parent->next_busno + parent->busno_spacing;
	pb->next_busno = pb->busno+1;
	pb->busno_spacing = parent->busno_spacing >> 1;
	if (!pb->busno_spacing)
		panic("PCI busses nested too deep.");
	pb->last_busno = parent->next_busno - 1;
//.........这里部分代码省略.........

void
amdpm_attach(struct device *parent, struct device *self, void *aux)
{
	struct amdpm_softc *sc = (struct amdpm_softc *) self;
	struct pci_attach_args *pa = aux;
	struct timeval tv1, tv2;
	pcireg_t reg;
	int i;

	sc->sc_pc = pa->pa_pc;
	sc->sc_tag = pa->pa_tag;
	sc->sc_iot = pa->pa_iot;

	reg = pci_conf_read(pa->pa_pc, pa->pa_tag, AMDPM_CONFREG);
	if ((reg & AMDPM_PMIOEN) == 0) {
		printf(": PMxx space isn't enabled\n");
		return;
	}
	reg = pci_conf_read(pa->pa_pc, pa->pa_tag, AMDPM_PMPTR);
	if (bus_space_map(sc->sc_iot, AMDPM_PMBASE(reg), AMDPM_PMSIZE,
	    0, &sc->sc_ioh)) {
		printf(": failed to map PMxx space\n");
		return;
	}

	reg = pci_conf_read(pa->pa_pc, pa->pa_tag, AMDPM_CONFREG);
	if (reg & AMDPM_RNGEN) {
		/* Check to see if we can read data from the RNG. */
		(void) bus_space_read_4(sc->sc_iot, sc->sc_ioh,
		    AMDPM_RNGDATA);
		/* benchmark the RNG */
		microtime(&tv1);
		for (i = 2 * 1024; i--; ) {
			while(!(bus_space_read_1(sc->sc_iot, sc->sc_ioh,
			    AMDPM_RNGSTAT) & AMDPM_RNGDONE))
				;
			(void) bus_space_read_4(sc->sc_iot, sc->sc_ioh,
			    AMDPM_RNGDATA);
		}
		microtime(&tv2);

		timersub(&tv2, &tv1, &tv1);
		if (tv1.tv_sec)
			tv1.tv_usec += 1000000 * tv1.tv_sec;
		printf(": rng active, %dKb/sec", 8 * 1000000 / tv1.tv_usec);

#ifdef AMDPM_RND_COUNTERS
			evcnt_attach_dynamic(&sc->sc_rnd_hits, EVCNT_TYPE_MISC,
			    NULL, sc->sc_dev.dv_xname, "rnd hits");
			evcnt_attach_dynamic(&sc->sc_rnd_miss, EVCNT_TYPE_MISC,
			    NULL, sc->sc_dev.dv_xname, "rnd miss");
			for (i = 0; i < 256; i++) {
				evcnt_attach_dynamic(&sc->sc_rnd_data[i],
				    EVCNT_TYPE_MISC, NULL, sc->sc_dev.dv_xname,
				    "rnd data");
			}
#endif
		timeout_set(&sc->sc_rnd_ch, amdpm_rnd_callout, sc);
		amdpm_rnd_callout(sc);
	}
}

static void
piixpm_attach(device_t parent, device_t self, void *aux)
{
	struct piixpm_softc *sc = device_private(self);
	struct pci_attach_args *pa = aux;
	struct i2cbus_attach_args iba;
	pcireg_t base, conf;
	pcireg_t pmmisc;
	pci_intr_handle_t ih;
	const char *intrstr = NULL;
	int i, numbusses = 1;

	sc->sc_dev = self;
	sc->sc_iot = pa->pa_iot;
	sc->sc_id = pa->pa_id;
	sc->sc_pc = pa->pa_pc;
	sc->sc_pcitag = pa->pa_tag;

	pci_aprint_devinfo(pa, NULL);

	if (!pmf_device_register(self, piixpm_suspend, piixpm_resume))
		aprint_error_dev(self, "couldn't establish power handler\n");

	/* Read configuration */
	conf = pci_conf_read(pa->pa_pc, pa->pa_tag, PIIX_SMB_HOSTC);
	DPRINTF(("%s: conf 0x%x\n", device_xname(self), conf));

	if ((PCI_VENDOR(pa->pa_id) != PCI_VENDOR_INTEL) ||
	    (PCI_PRODUCT(pa->pa_id) != PCI_PRODUCT_INTEL_82371AB_PMC))
		goto nopowermanagement;

	/* check whether I/O access to PM regs is enabled */
	pmmisc = pci_conf_read(pa->pa_pc, pa->pa_tag, PIIX_PMREGMISC);
	if (!(pmmisc & 1))
		goto nopowermanagement;

	/* Map I/O space */
	base = pci_conf_read(pa->pa_pc, pa->pa_tag, PIIX_PM_BASE);
	if (bus_space_map(sc->sc_pm_iot, PCI_MAPREG_IO_ADDR(base),
	    PIIX_PM_SIZE, 0, &sc->sc_pm_ioh)) {
		aprint_error_dev(self, "can't map power management I/O space\n");
		goto nopowermanagement;
	}

	/*
	 * Revision 0 and 1 are PIIX4, 2 is PIIX4E, 3 is PIIX4M.
	 * PIIX4 and PIIX4E have a bug in the timer latch, see Errata #20
	 * in the "Specification update" (document #297738).
	 */
	acpipmtimer_attach(self, sc->sc_pm_iot, sc->sc_pm_ioh,
			   PIIX_PM_PMTMR,
		(PCI_REVISION(pa->pa_class) < 3) ? ACPIPMT_BADLATCH : 0 );

nopowermanagement:

	/* SB800 rev 0x40+ needs special initialization */
	if (PCI_VENDOR(pa->pa_id) == PCI_VENDOR_ATI &&
	    PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_ATI_SB600_SMB &&
	    PCI_REVISION(pa->pa_class) >= 0x40) {
		if (piixpm_sb800_init(sc) == 0) {
			numbusses = 4;
			goto attach_i2c;
		}
		aprint_normal_dev(self, "SMBus disabled\n");
		return;
	}

	if ((conf & PIIX_SMB_HOSTC_HSTEN) == 0) {
		aprint_normal_dev(self, "SMBus disabled\n");
		return;
	}

	/* Map I/O space */
	base = pci_conf_read(pa->pa_pc, pa->pa_tag, PIIX_SMB_BASE) & 0xffff;
	if (bus_space_map(sc->sc_smb_iot, PCI_MAPREG_IO_ADDR(base),
	    PIIX_SMB_SIZE, 0, &sc->sc_smb_ioh)) {
		aprint_error_dev(self, "can't map smbus I/O space\n");
		return;
	}

	sc->sc_poll = 1;
	aprint_normal_dev(self, "");
	if ((conf & PIIX_SMB_HOSTC_INTMASK) == PIIX_SMB_HOSTC_SMI) {
		/* No PCI IRQ */
		aprint_normal("interrupting at SMI, ");
	} else if ((conf & PIIX_SMB_HOSTC_INTMASK) == PIIX_SMB_HOSTC_IRQ) {
		/* Install interrupt handler */
		if (pci_intr_map(pa, &ih) == 0) {
			intrstr = pci_intr_string(pa->pa_pc, ih);
			sc->sc_smb_ih = pci_intr_establish(pa->pa_pc, ih, IPL_BIO,
			    piixpm_intr, sc);
			if (sc->sc_smb_ih != NULL) {
				aprint_normal("interrupting at %s", intrstr);
				sc->sc_poll = 0;
			}
		}
	}
	if (sc->sc_poll)
		aprint_normal("polling");

//.........这里部分代码省略.........

static void
acer_chip_map(struct pciide_softc *sc, const struct pci_attach_args *pa)
{
	struct pciide_channel *cp;
	int channel;
	pcireg_t cr, interface;
	pcireg_t rev = PCI_REVISION(pa->pa_class);
	struct aceride_softc *acer_sc = (struct aceride_softc *)sc;

	if (pciide_chipen(sc, pa) == 0)
		return;

	aprint_verbose_dev(sc->sc_wdcdev.sc_atac.atac_dev,
	    "bus-master DMA support present");
	pciide_mapreg_dma(sc, pa);
	aprint_verbose("\n");
	sc->sc_wdcdev.sc_atac.atac_cap = ATAC_CAP_DATA16 | ATAC_CAP_DATA32;
	if (sc->sc_dma_ok) {
		sc->sc_wdcdev.sc_atac.atac_cap |= ATAC_CAP_DMA;
		if (rev >= 0x20) {
			sc->sc_wdcdev.sc_atac.atac_cap |= ATAC_CAP_UDMA;
			if (rev >= 0xC7)
				sc->sc_wdcdev.sc_atac.atac_udma_cap = 6;
			else if (rev >= 0xC4)
				sc->sc_wdcdev.sc_atac.atac_udma_cap = 5;
			else if (rev >= 0xC2)
				sc->sc_wdcdev.sc_atac.atac_udma_cap = 4;
			else
				sc->sc_wdcdev.sc_atac.atac_udma_cap = 2;
		}
		sc->sc_wdcdev.irqack = pciide_irqack;
		if (rev <= 0xc4) {
			sc->sc_wdcdev.dma_init = acer_dma_init;
			aprint_verbose_dev(sc->sc_wdcdev.sc_atac.atac_dev,
			 "using PIO transfers above 137GB as workaround for "
			 "48bit DMA access bug, expect reduced performance\n");
		}
	}

	sc->sc_wdcdev.sc_atac.atac_pio_cap = 4;
	sc->sc_wdcdev.sc_atac.atac_dma_cap = 2;
	sc->sc_wdcdev.sc_atac.atac_set_modes = acer_setup_channel;
	sc->sc_wdcdev.sc_atac.atac_channels = sc->wdc_chanarray;
	sc->sc_wdcdev.sc_atac.atac_nchannels = PCIIDE_NUM_CHANNELS;
	sc->sc_wdcdev.wdc_maxdrives = 2;

	pciide_pci_write(sc->sc_pc, sc->sc_tag, ACER_CDRC,
	    (pciide_pci_read(sc->sc_pc, sc->sc_tag, ACER_CDRC) |
		ACER_CDRC_DMA_EN) & ~ACER_CDRC_FIFO_DISABLE);

	/* Enable "microsoft register bits" R/W. */
	pciide_pci_write(sc->sc_pc, sc->sc_tag, ACER_CCAR3,
	    pciide_pci_read(sc->sc_pc, sc->sc_tag, ACER_CCAR3) | ACER_CCAR3_PI);
	pciide_pci_write(sc->sc_pc, sc->sc_tag, ACER_CCAR1,
	    pciide_pci_read(sc->sc_pc, sc->sc_tag, ACER_CCAR1) &
	    ~(ACER_CHANSTATUS_RO|PCIIDE_CHAN_RO(0)|PCIIDE_CHAN_RO(1)));
	pciide_pci_write(sc->sc_pc, sc->sc_tag, ACER_CCAR2,
	    pciide_pci_read(sc->sc_pc, sc->sc_tag, ACER_CCAR2) &
	    ~ACER_CHANSTATUSREGS_RO);
	cr = pci_conf_read(sc->sc_pc, sc->sc_tag, PCI_CLASS_REG);
	cr |= (PCIIDE_CHANSTATUS_EN << PCI_INTERFACE_SHIFT);
	
	{
		/*
		 * some BIOSes (port-cats ABLE) enable native mode, but don't
		 * setup everything correctly, so allow the forcing of
		 * compat mode
		 */
		bool force_compat_mode;
		bool property_is_set;
		property_is_set = prop_dictionary_get_bool(
				device_properties(sc->sc_wdcdev.sc_atac.atac_dev),
				"ali1543-ide-force-compat-mode",
				&force_compat_mode);
		if (property_is_set && force_compat_mode) {
			cr &= ~((PCIIDE_INTERFACE_PCI(0)
				| PCIIDE_INTERFACE_PCI(1))
				<< PCI_INTERFACE_SHIFT);
		}
	}

	pci_conf_write(sc->sc_pc, sc->sc_tag, PCI_CLASS_REG, cr);
	/* Don't use cr, re-read the real register content instead */
	interface = PCI_INTERFACE(pci_conf_read(sc->sc_pc, sc->sc_tag,
	    PCI_CLASS_REG));

	/* From linux: enable "Cable Detection" */
	if (rev >= 0xC2) {
		pciide_pci_write(sc->sc_pc, sc->sc_tag, ACER_0x4B,
		    pciide_pci_read(sc->sc_pc, sc->sc_tag, ACER_0x4B)
		    | ACER_0x4B_CDETECT);
	}

	wdc_allocate_regs(&sc->sc_wdcdev);
	if (rev == 0xC3) {
		/* install reset bug workaround */
		if (pci_find_device(&acer_sc->pcib_pa, acer_pcib_match) == 0) {
			aprint_error_dev(sc->sc_wdcdev.sc_atac.atac_dev,
			    "WARNING: can't find pci-isa bridge\n");
		} else
//.........这里部分代码省略.........