Move pcn driver from sys/pci to sys/dev/pcn.

1 files changed, 0 insertions, 1527 deletions

diff --git a/sys/pci/if_pcn.c b/sys/pci/if_pcn.c
deleted file mode 100644
index 8298502..0000000
--- a/sys/pci/if_pcn.c
+++ /dev/null
@@ -1,1527 +0,0 @@
-/*-
- * Copyright (c) 2000 Berkeley Software Design, Inc.
- * Copyright (c) 1997, 1998, 1999, 2000
- *	Bill Paul <wpaul@osd.bsdi.com>.  All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- *    must display the following acknowledgement:
- *	This product includes software developed by Bill Paul.
- * 4. Neither the name of the author nor the names of any co-contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL Bill Paul OR THE VOICES IN HIS HEAD
- * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
- * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
- * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
- * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
- * THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-#include <sys/cdefs.h>
-__FBSDID("$FreeBSD$");
-
-/*
- * AMD Am79c972 fast ethernet PCI NIC driver. Datasheets are available
- * from http://www.amd.com.
- *
- * The AMD PCnet/PCI controllers are more advanced and functional
- * versions of the venerable 7990 LANCE. The PCnet/PCI chips retain
- * backwards compatibility with the LANCE and thus can be made
- * to work with older LANCE drivers. This is in fact how the
- * PCnet/PCI chips were supported in FreeBSD originally. The trouble
- * is that the PCnet/PCI devices offer several performance enhancements
- * which can't be exploited in LANCE compatibility mode. Chief among
- * these enhancements is the ability to perform PCI DMA operations
- * using 32-bit addressing (which eliminates the need for ISA
- * bounce-buffering), and special receive buffer alignment (which
- * allows the receive handler to pass packets to the upper protocol
- * layers without copying on both the x86 and alpha platforms).
- */
-
-#include <sys/param.h>
-#include <sys/systm.h>
-#include <sys/sockio.h>
-#include <sys/mbuf.h>
-#include <sys/malloc.h>
-#include <sys/kernel.h>
-#include <sys/module.h>
-#include <sys/socket.h>
-
-#include <net/if.h>
-#include <net/if_arp.h>
-#include <net/ethernet.h>
-#include <net/if_dl.h>
-#include <net/if_media.h>
-#include <net/if_types.h>
-
-#include <net/bpf.h>
-
-#include <vm/vm.h>              /* for vtophys */
-#include <vm/pmap.h>            /* for vtophys */
-#include <machine/bus.h>
-#include <machine/resource.h>
-#include <sys/bus.h>
-#include <sys/rman.h>
-
-#include <dev/mii/mii.h>
-#include <dev/mii/miivar.h>
-
-#include <dev/pci/pcireg.h>
-#include <dev/pci/pcivar.h>
-
-#define PCN_USEIOSPACE
-
-#include <pci/if_pcnreg.h>
-
-MODULE_DEPEND(pcn, pci, 1, 1, 1);
-MODULE_DEPEND(pcn, ether, 1, 1, 1);
-MODULE_DEPEND(pcn, miibus, 1, 1, 1);
-
-/* "device miibus" required.  See GENERIC if you get errors here. */
-#include "miibus_if.h"
-
-/*
- * Various supported device vendors/types and their names.
- */
-static const struct pcn_type pcn_devs[] = {
-	{ PCN_VENDORID, PCN_DEVICEID_PCNET, "AMD PCnet/PCI 10/100BaseTX" },
-	{ PCN_VENDORID, PCN_DEVICEID_HOME, "AMD PCnet/Home HomePNA" },
-	{ 0, 0, NULL }
-};
-
-static const struct pcn_chipid {
-	u_int32_t	id;
-	const char	*name;
-} pcn_chipid[] = {
-	{ Am79C971,	"Am79C971" },
-	{ Am79C972,	"Am79C972" },
-	{ Am79C973,	"Am79C973" },
-	{ Am79C978,	"Am79C978" },
-	{ Am79C975,	"Am79C975" },
-	{ Am79C976,	"Am79C976" },
-	{ 0, NULL },
-};
-
-static const char *pcn_chipid_name(u_int32_t);
-static u_int32_t pcn_chip_id(device_t);
-static const struct pcn_type *pcn_match(u_int16_t, u_int16_t);
-
-static u_int32_t pcn_csr_read(struct pcn_softc *, int);
-static u_int16_t pcn_csr_read16(struct pcn_softc *, int);
-static u_int16_t pcn_bcr_read16(struct pcn_softc *, int);
-static void pcn_csr_write(struct pcn_softc *, int, int);
-static u_int32_t pcn_bcr_read(struct pcn_softc *, int);
-static void pcn_bcr_write(struct pcn_softc *, int, int);
-
-static int pcn_probe(device_t);
-static int pcn_attach(device_t);
-static int pcn_detach(device_t);
-
-static int pcn_newbuf(struct pcn_softc *, int, struct mbuf *);
-static int pcn_encap(struct pcn_softc *, struct mbuf *, u_int32_t *);
-static void pcn_rxeof(struct pcn_softc *);
-static void pcn_txeof(struct pcn_softc *);
-static void pcn_intr(void *);
-static void pcn_tick(void *);
-static void pcn_start(struct ifnet *);
-static void pcn_start_locked(struct ifnet *);
-static int pcn_ioctl(struct ifnet *, u_long, caddr_t);
-static void pcn_init(void *);
-static void pcn_init_locked(struct pcn_softc *);
-static void pcn_stop(struct pcn_softc *);
-static void pcn_watchdog(struct ifnet *);
-static void pcn_shutdown(device_t);
-static int pcn_ifmedia_upd(struct ifnet *);
-static void pcn_ifmedia_sts(struct ifnet *, struct ifmediareq *);
-
-static int pcn_miibus_readreg(device_t, int, int);
-static int pcn_miibus_writereg(device_t, int, int, int);
-static void pcn_miibus_statchg(device_t);
-
-static void pcn_setfilt(struct ifnet *);
-static void pcn_setmulti(struct pcn_softc *);
-static void pcn_reset(struct pcn_softc *);
-static int pcn_list_rx_init(struct pcn_softc *);
-static int pcn_list_tx_init(struct pcn_softc *);
-
-#ifdef PCN_USEIOSPACE
-#define PCN_RES			SYS_RES_IOPORT
-#define PCN_RID			PCN_PCI_LOIO
-#else
-#define PCN_RES			SYS_RES_MEMORY
-#define PCN_RID			PCN_PCI_LOMEM
-#endif
-
-static device_method_t pcn_methods[] = {
-	/* Device interface */
-	DEVMETHOD(device_probe,		pcn_probe),
-	DEVMETHOD(device_attach,	pcn_attach),
-	DEVMETHOD(device_detach,	pcn_detach),
-	DEVMETHOD(device_shutdown,	pcn_shutdown),
-
-	/* bus interface */
-	DEVMETHOD(bus_print_child,	bus_generic_print_child),
-	DEVMETHOD(bus_driver_added,	bus_generic_driver_added),
-
-	/* MII interface */
-	DEVMETHOD(miibus_readreg,	pcn_miibus_readreg),
-	DEVMETHOD(miibus_writereg,	pcn_miibus_writereg),
-	DEVMETHOD(miibus_statchg,	pcn_miibus_statchg),
-
-	{ 0, 0 }
-};
-
-static driver_t pcn_driver = {
-	"pcn",
-	pcn_methods,
-	sizeof(struct pcn_softc)
-};
-
-static devclass_t pcn_devclass;
-
-DRIVER_MODULE(pcn, pci, pcn_driver, pcn_devclass, 0, 0);
-DRIVER_MODULE(miibus, pcn, miibus_driver, miibus_devclass, 0, 0);
-
-#define PCN_CSR_SETBIT(sc, reg, x)			\
-	pcn_csr_write(sc, reg, pcn_csr_read(sc, reg) | (x))
-
-#define PCN_CSR_CLRBIT(sc, reg, x)			\
-	pcn_csr_write(sc, reg, pcn_csr_read(sc, reg) & ~(x))
-
-#define PCN_BCR_SETBIT(sc, reg, x)			\
-	pcn_bcr_write(sc, reg, pcn_bcr_read(sc, reg) | (x))
-
-#define PCN_BCR_CLRBIT(sc, reg, x)			\
-	pcn_bcr_write(sc, reg, pcn_bcr_read(sc, reg) & ~(x))
-
-static u_int32_t
-pcn_csr_read(sc, reg)
-	struct pcn_softc	*sc;
-	int			reg;
-{
-	CSR_WRITE_4(sc, PCN_IO32_RAP, reg);
-	return(CSR_READ_4(sc, PCN_IO32_RDP));
-}
-
-static u_int16_t
-pcn_csr_read16(sc, reg)
-	struct pcn_softc	*sc;
-	int			reg;
-{
-	CSR_WRITE_2(sc, PCN_IO16_RAP, reg);
-	return(CSR_READ_2(sc, PCN_IO16_RDP));
-}
-
-static void
-pcn_csr_write(sc, reg, val)
-	struct pcn_softc	*sc;
-	int			reg;
-	int			val;
-{
-	CSR_WRITE_4(sc, PCN_IO32_RAP, reg);
-	CSR_WRITE_4(sc, PCN_IO32_RDP, val);
-	return;
-}
-
-static u_int32_t
-pcn_bcr_read(sc, reg)
-	struct pcn_softc	*sc;
-	int			reg;
-{
-	CSR_WRITE_4(sc, PCN_IO32_RAP, reg);
-	return(CSR_READ_4(sc, PCN_IO32_BDP));
-}
-
-static u_int16_t
-pcn_bcr_read16(sc, reg)
-	struct pcn_softc	*sc;
-	int			reg;
-{
-	CSR_WRITE_2(sc, PCN_IO16_RAP, reg);
-	return(CSR_READ_2(sc, PCN_IO16_BDP));
-}
-
-static void
-pcn_bcr_write(sc, reg, val)
-	struct pcn_softc	*sc;
-	int			reg;
-	int			val;
-{
-	CSR_WRITE_4(sc, PCN_IO32_RAP, reg);
-	CSR_WRITE_4(sc, PCN_IO32_BDP, val);
-	return;
-}
-
-static int
-pcn_miibus_readreg(dev, phy, reg)
-	device_t		dev;
-	int			phy, reg;
-{
-	struct pcn_softc	*sc;
-	int			val;
-
-	sc = device_get_softc(dev);
-
-	/*
-	 * At least Am79C971 with DP83840A wedge when isolating the
-	 * external PHY so we can't allow multiple external PHYs.
-	 * There are cards that use Am79C971 with both the internal
-	 * and an external PHY though.
-	 * For internal PHYs it doesn't really matter whether we can
-	 * isolate the remaining internal and the external ones in
-	 * the PHY drivers as the internal PHYs have to be enabled
-	 * individually in PCN_BCR_PHYSEL, PCN_CSR_MODE, etc.
-	 * With Am79C97{3,5,8} we don't support switching beetween
-	 * the internal and external PHYs, yet, so we can't allow
-	 * multiple PHYs with these either.
-	 * Am79C97{2,6} actually only support external PHYs (not
-	 * connectable internal ones respond at the usual addresses,
-	 * which don't hurt if we let them show up on the bus) and
-	 * isolating them works.
-	 */
-	if (((sc->pcn_type == Am79C971 && phy != PCN_PHYAD_10BT) ||
-	    sc->pcn_type == Am79C973 || sc->pcn_type == Am79C975 ||
-	    sc->pcn_type == Am79C978) && sc->pcn_extphyaddr != -1 &&
-	    phy != sc->pcn_extphyaddr)
-		return(0);
-
-	pcn_bcr_write(sc, PCN_BCR_MIIADDR, reg | (phy << 5));
-	val = pcn_bcr_read(sc, PCN_BCR_MIIDATA) & 0xFFFF;
-	if (val == 0xFFFF)
-		return(0);
-
-	if (((sc->pcn_type == Am79C971 && phy != PCN_PHYAD_10BT) ||
-	    sc->pcn_type == Am79C973 || sc->pcn_type == Am79C975 ||
-	    sc->pcn_type == Am79C978) && sc->pcn_extphyaddr == -1)
-		sc->pcn_extphyaddr = phy;
-
-	return(val);
-}
-
-static int
-pcn_miibus_writereg(dev, phy, reg, data)
-	device_t		dev;
-	int			phy, reg, data;
-{
-	struct pcn_softc	*sc;
-
-	sc = device_get_softc(dev);
-
-	pcn_bcr_write(sc, PCN_BCR_MIIADDR, reg | (phy << 5));
-	pcn_bcr_write(sc, PCN_BCR_MIIDATA, data);
-
-	return(0);
-}
-
-static void
-pcn_miibus_statchg(dev)
-	device_t		dev;
-{
-	struct pcn_softc	*sc;
-	struct mii_data		*mii;
-
-	sc = device_get_softc(dev);
-	mii = device_get_softc(sc->pcn_miibus);
-
-	if ((mii->mii_media_active & IFM_GMASK) == IFM_FDX) {
-		PCN_BCR_SETBIT(sc, PCN_BCR_DUPLEX, PCN_DUPLEX_FDEN);
-	} else {
-		PCN_BCR_CLRBIT(sc, PCN_BCR_DUPLEX, PCN_DUPLEX_FDEN);
-	}
-
-	return;
-}
-
-static void
-pcn_setmulti(sc)
-	struct pcn_softc	*sc;
-{
-	struct ifnet		*ifp;
-	struct ifmultiaddr	*ifma;
-	u_int32_t		h, i;
-	u_int16_t		hashes[4] = { 0, 0, 0, 0 };
-
-	ifp = sc->pcn_ifp;
-
-	PCN_CSR_SETBIT(sc, PCN_CSR_EXTCTL1, PCN_EXTCTL1_SPND);
-
-	if (ifp->if_flags & IFF_ALLMULTI || ifp->if_flags & IFF_PROMISC) {
-		for (i = 0; i < 4; i++)
-			pcn_csr_write(sc, PCN_CSR_MAR0 + i, 0xFFFF);
-		PCN_CSR_CLRBIT(sc, PCN_CSR_EXTCTL1, PCN_EXTCTL1_SPND);
-		return;
-	}
-
-	/* first, zot all the existing hash bits */
-	for (i = 0; i < 4; i++)
-		pcn_csr_write(sc, PCN_CSR_MAR0 + i, 0);
-
-	/* now program new ones */
-	IF_ADDR_LOCK(ifp);
-	TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) {
-		if (ifma->ifma_addr->sa_family != AF_LINK)
-			continue;
-		h = ether_crc32_le(LLADDR((struct sockaddr_dl *)
-		    ifma->ifma_addr), ETHER_ADDR_LEN) >> 26;
-		hashes[h >> 4] |= 1 << (h & 0xF);
-	}
-	IF_ADDR_UNLOCK(ifp);
-
-	for (i = 0; i < 4; i++)
-		pcn_csr_write(sc, PCN_CSR_MAR0 + i, hashes[i]);
-
-	PCN_CSR_CLRBIT(sc, PCN_CSR_EXTCTL1, PCN_EXTCTL1_SPND);
-
-	return;
-}
-
-static void
-pcn_reset(sc)
-	struct pcn_softc	*sc;
-{
-	/*
-	 * Issue a reset by reading from the RESET register.
-	 * Note that we don't know if the chip is operating in
-	 * 16-bit or 32-bit mode at this point, so we attempt
-	 * to reset the chip both ways. If one fails, the other
-	 * will succeed.
-	 */
-	CSR_READ_2(sc, PCN_IO16_RESET);
-	CSR_READ_4(sc, PCN_IO32_RESET);
-
-	/* Wait a little while for the chip to get its brains in order. */
-	DELAY(1000);
-
-	/* Select 32-bit (DWIO) mode */
-	CSR_WRITE_4(sc, PCN_IO32_RDP, 0);
-
-	/* Select software style 3. */
-	pcn_bcr_write(sc, PCN_BCR_SSTYLE, PCN_SWSTYLE_PCNETPCI_BURST);
-
-        return;
-}
-
-static const char *
-pcn_chipid_name(u_int32_t id)
-{
-	const struct pcn_chipid *p;
-
-	p = pcn_chipid;
-	while (p->name) {
-		if (id == p->id)
-			return (p->name);
-		p++;
-	}
-	return ("Unknown");
-}
-
-static u_int32_t
-pcn_chip_id(device_t dev)
-{
-	struct pcn_softc	*sc;
-	u_int32_t		chip_id;
-
-	sc = device_get_softc(dev);
-	/*
-	 * Note: we can *NOT* put the chip into
-	 * 32-bit mode yet. The le(4) driver will only
-	 * work in 16-bit mode, and once the chip
-	 * goes into 32-bit mode, the only way to
-	 * get it out again is with a hardware reset.
-	 * So if pcn_probe() is called before the
-	 * le(4) driver's probe routine, the chip will
-	 * be locked into 32-bit operation and the
-	 * le(4) driver will be unable to attach to it.
-	 * Note II: if the chip happens to already
-	 * be in 32-bit mode, we still need to check
-	 * the chip ID, but first we have to detect
-	 * 32-bit mode using only 16-bit operations.
-	 * The safest way to do this is to read the
-	 * PCI subsystem ID from BCR23/24 and compare
-	 * that with the value read from PCI config
-	 * space.
-	 */
-	chip_id = pcn_bcr_read16(sc, PCN_BCR_PCISUBSYSID);
-	chip_id <<= 16;
-	chip_id |= pcn_bcr_read16(sc, PCN_BCR_PCISUBVENID);
-	/*
-	 * Note III: the test for 0x10001000 is a hack to
-	 * pacify VMware, who's pseudo-PCnet interface is
-	 * broken. Reading the subsystem register from PCI
-	 * config space yields 0x00000000 while reading the
-	 * same value from I/O space yields 0x10001000. It's
-	 * not supposed to be that way.
-	 */
-	if (chip_id == pci_read_config(dev,
-	    PCIR_SUBVEND_0, 4) || chip_id == 0x10001000) {
-		/* We're in 16-bit mode. */
-		chip_id = pcn_csr_read16(sc, PCN_CSR_CHIPID1);
-		chip_id <<= 16;
-		chip_id |= pcn_csr_read16(sc, PCN_CSR_CHIPID0);
-	} else {
-		/* We're in 32-bit mode. */
-		chip_id = pcn_csr_read(sc, PCN_CSR_CHIPID1);
-		chip_id <<= 16;
-		chip_id |= pcn_csr_read(sc, PCN_CSR_CHIPID0);
-	}
-
-	return (chip_id);
-}
-
-static const struct pcn_type *
-pcn_match(u_int16_t vid, u_int16_t did)
-{
-	const struct pcn_type	*t;
-
-	t = pcn_devs;
-	while (t->pcn_name != NULL) {
-		if ((vid == t->pcn_vid) && (did == t->pcn_did))
-			return (t);
-		t++;
-	}
-	return (NULL);
-}
-
-/*
- * Probe for an AMD chip. Check the PCI vendor and device
- * IDs against our list and return a device name if we find a match.
- */
-static int
-pcn_probe(dev)
-	device_t		dev;
-{
-	const struct pcn_type	*t;
-	struct pcn_softc	*sc;
-	int			rid;
-	u_int32_t		chip_id;
-
-	t = pcn_match(pci_get_vendor(dev), pci_get_device(dev));
-	if (t == NULL)
-		return (ENXIO);
-	sc = device_get_softc(dev);
-
-	/*
-	 * Temporarily map the I/O space so we can read the chip ID register.
-	 */
-	rid = PCN_RID;
-	sc->pcn_res = bus_alloc_resource_any(dev, PCN_RES, &rid, RF_ACTIVE);
-	if (sc->pcn_res == NULL) {
-		device_printf(dev, "couldn't map ports/memory\n");
-		return(ENXIO);
-	}
-	sc->pcn_btag = rman_get_bustag(sc->pcn_res);
-	sc->pcn_bhandle = rman_get_bushandle(sc->pcn_res);
-
-	chip_id = pcn_chip_id(dev);
-
-	bus_release_resource(dev, PCN_RES, PCN_RID, sc->pcn_res);
-
-	switch((chip_id >> 12) & PART_MASK) {
-	case Am79C971:
-	case Am79C972:
-	case Am79C973:
-	case Am79C975:
-	case Am79C976:
-	case Am79C978:
-		break;
-	default:
-		return(ENXIO);
-	}
-	device_set_desc(dev, t->pcn_name);
-	return(BUS_PROBE_DEFAULT);
-}
-
-/*
- * Attach the interface. Allocate softc structures, do ifmedia
- * setup and ethernet/BPF attach.
- */
-static int
-pcn_attach(dev)
-	device_t		dev;
-{
-	u_int32_t		eaddr[2];
-	struct pcn_softc	*sc;
-	struct mii_data		*mii;
-	struct mii_softc	*miisc;
-	struct ifnet		*ifp;
-	int			error = 0, rid;
-
-	sc = device_get_softc(dev);
-
-	/* Initialize our mutex. */
-	mtx_init(&sc->pcn_mtx, device_get_nameunit(dev), MTX_NETWORK_LOCK,
-	    MTX_DEF);
-	/*
-	 * Map control/status registers.
-	 */
-	pci_enable_busmaster(dev);
-
-	/* Retrieve the chip ID */
-	sc->pcn_type = (pcn_chip_id(dev) >> 12) & PART_MASK;
-	device_printf(dev, "Chip ID %04x (%s)\n",
-		sc->pcn_type, pcn_chipid_name(sc->pcn_type));
-
-	rid = PCN_RID;
-	sc->pcn_res = bus_alloc_resource_any(dev, PCN_RES, &rid, RF_ACTIVE);
-
-	if (sc->pcn_res == NULL) {
-		device_printf(dev, "couldn't map ports/memory\n");
-		error = ENXIO;
-		goto fail;
-	}
-
-	sc->pcn_btag = rman_get_bustag(sc->pcn_res);
-	sc->pcn_bhandle = rman_get_bushandle(sc->pcn_res);
-
-	/* Allocate interrupt */
-	rid = 0;
-	sc->pcn_irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid,
-	    RF_SHAREABLE | RF_ACTIVE);
-
-	if (sc->pcn_irq == NULL) {
-		device_printf(dev, "couldn't map interrupt\n");
-		error = ENXIO;
-		goto fail;
-	}
-
-	/* Reset the adapter. */
-	pcn_reset(sc);
-
-	/*
-	 * Get station address from the EEPROM.
-	 */
-	eaddr[0] = CSR_READ_4(sc, PCN_IO32_APROM00);
-	eaddr[1] = CSR_READ_4(sc, PCN_IO32_APROM01);
-
-	callout_init_mtx(&sc->pcn_stat_callout, &sc->pcn_mtx, 0);
-
-	sc->pcn_ldata = contigmalloc(sizeof(struct pcn_list_data), M_DEVBUF,
-	    M_NOWAIT, 0, 0xffffffff, PAGE_SIZE, 0);
-
-	if (sc->pcn_ldata == NULL) {
-		device_printf(dev, "no memory for list buffers!\n");
-		error = ENXIO;
-		goto fail;
-	}
-	bzero(sc->pcn_ldata, sizeof(struct pcn_list_data));
-
-	ifp = sc->pcn_ifp = if_alloc(IFT_ETHER);
-	if (ifp == NULL) {
-		device_printf(dev, "can not if_alloc()\n");
-		error = ENOSPC;
-		goto fail;
-	}
-	ifp->if_softc = sc;
-	if_initname(ifp, device_get_name(dev), device_get_unit(dev));
-	ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST;
-	ifp->if_ioctl = pcn_ioctl;
-	ifp->if_start = pcn_start;
-	ifp->if_watchdog = pcn_watchdog;
-	ifp->if_init = pcn_init;
-	ifp->if_snd.ifq_maxlen = PCN_TX_LIST_CNT - 1;
-
-	/*
-	 * Do MII setup.
-	 */
-	sc->pcn_extphyaddr = -1;
-	if (mii_phy_probe(dev, &sc->pcn_miibus,
-	    pcn_ifmedia_upd, pcn_ifmedia_sts)) {
-		device_printf(dev, "MII without any PHY!\n");
-		error = ENXIO;
-		goto fail;
-	}
-	/*
-	 * Record the media instances of internal PHYs, which map the
-	 * built-in interfaces to the MII, so we can set the active
-	 * PHY/port based on the currently selected media.
-	 */
-	sc->pcn_inst_10bt = -1;
-	mii = device_get_softc(sc->pcn_miibus);
-	LIST_FOREACH(miisc, &mii->mii_phys, mii_list) {
-		switch (miisc->mii_phy) {
-		case PCN_PHYAD_10BT:
-			sc->pcn_inst_10bt = miisc->mii_inst;
-			break;
-		/*
-		 * XXX deal with the Am79C97{3,5} internal 100baseT
-		 * and the Am79C978 internal HomePNA PHYs.
-		 */
-		}
-	}
-
-	/*
-	 * Call MI attach routine.
-	 */
-	ether_ifattach(ifp, (u_int8_t *) eaddr);
-
-	/* Hook interrupt last to avoid having to lock softc */
-	error = bus_setup_intr(dev, sc->pcn_irq, INTR_TYPE_NET | INTR_MPSAFE,
-	    NULL, pcn_intr, sc, &sc->pcn_intrhand);
-
-	if (error) {
-		device_printf(dev, "couldn't set up irq\n");
-		ether_ifdetach(ifp);
-		goto fail;
-	}
-
-fail:
-	if (error)
-		pcn_detach(dev);
-
-	return(error);
-}
-
-/*
- * Shutdown hardware and free up resources. This can be called any
- * time after the mutex has been initialized. It is called in both
- * the error case in attach and the normal detach case so it needs
- * to be careful about only freeing resources that have actually been
- * allocated.
- */
-static int
-pcn_detach(dev)
-	device_t		dev;
-{
-	struct pcn_softc	*sc;
-	struct ifnet		*ifp;
-
-	sc = device_get_softc(dev);
-	ifp = sc->pcn_ifp;
-
-	KASSERT(mtx_initialized(&sc->pcn_mtx), ("pcn mutex not initialized"));
-
-	/* These should only be active if attach succeeded */
-	if (device_is_attached(dev)) {
-		PCN_LOCK(sc);
-		pcn_reset(sc);
-		pcn_stop(sc);
-		PCN_UNLOCK(sc);
-		callout_drain(&sc->pcn_stat_callout);
-		ether_ifdetach(ifp);
-	}
-	if (sc->pcn_miibus)
-		device_delete_child(dev, sc->pcn_miibus);
-	bus_generic_detach(dev);
-
-	if (sc->pcn_intrhand)
-		bus_teardown_intr(dev, sc->pcn_irq, sc->pcn_intrhand);
-	if (sc->pcn_irq)
-		bus_release_resource(dev, SYS_RES_IRQ, 0, sc->pcn_irq);
-	if (sc->pcn_res)
-		bus_release_resource(dev, PCN_RES, PCN_RID, sc->pcn_res);
-
-	if (ifp)
-		if_free(ifp);
-
-	if (sc->pcn_ldata) {
-		contigfree(sc->pcn_ldata, sizeof(struct pcn_list_data),
-		    M_DEVBUF);
-	}
-
-	mtx_destroy(&sc->pcn_mtx);
-
-	return(0);
-}
-
-/*
- * Initialize the transmit descriptors.
- */
-static int
-pcn_list_tx_init(sc)
-	struct pcn_softc	*sc;
-{
-	struct pcn_list_data	*ld;
-	struct pcn_ring_data	*cd;
-	int			i;
-
-	cd = &sc->pcn_cdata;
-	ld = sc->pcn_ldata;
-
-	for (i = 0; i < PCN_TX_LIST_CNT; i++) {
-		cd->pcn_tx_chain[i] = NULL;
-		ld->pcn_tx_list[i].pcn_tbaddr = 0;
-		ld->pcn_tx_list[i].pcn_txctl = 0;
-		ld->pcn_tx_list[i].pcn_txstat = 0;
-	}
-
-	cd->pcn_tx_prod = cd->pcn_tx_cons = cd->pcn_tx_cnt = 0;
-
-	return(0);
-}
-
-
-/*
- * Initialize the RX descriptors and allocate mbufs for them.
- */
-static int
-pcn_list_rx_init(sc)
-	struct pcn_softc	*sc;
-{
-	struct pcn_ring_data	*cd;
-	int			i;
-
-	cd = &sc->pcn_cdata;
-
-	for (i = 0; i < PCN_RX_LIST_CNT; i++) {
-		if (pcn_newbuf(sc, i, NULL) == ENOBUFS)
-			return(ENOBUFS);
-	}
-
-	cd->pcn_rx_prod = 0;
-
-	return(0);
-}
-
-/*
- * Initialize an RX descriptor and attach an MBUF cluster.
- */
-static int
-pcn_newbuf(sc, idx, m)
-	struct pcn_softc	*sc;
-	int			idx;
-	struct mbuf		*m;
-{
-	struct mbuf		*m_new = NULL;
-	struct pcn_rx_desc	*c;
-
-	c = &sc->pcn_ldata->pcn_rx_list[idx];
-
-	if (m == NULL) {
-		MGETHDR(m_new, M_DONTWAIT, MT_DATA);
-		if (m_new == NULL)
-			return(ENOBUFS);
-
-		MCLGET(m_new, M_DONTWAIT);
-		if (!(m_new->m_flags & M_EXT)) {
-			m_freem(m_new);
-			return(ENOBUFS);
-		}
-		m_new->m_len = m_new->m_pkthdr.len = MCLBYTES;
-	} else {
-		m_new = m;
-		m_new->m_len = m_new->m_pkthdr.len = MCLBYTES;
-		m_new->m_data = m_new->m_ext.ext_buf;
-	}
-
-	m_adj(m_new, ETHER_ALIGN);
-
-	sc->pcn_cdata.pcn_rx_chain[idx] = m_new;
-	c->pcn_rbaddr = vtophys(mtod(m_new, caddr_t));
-	c->pcn_bufsz = (~(PCN_RXLEN) + 1) & PCN_RXLEN_BUFSZ;
-	c->pcn_bufsz |= PCN_RXLEN_MBO;
-	c->pcn_rxstat = PCN_RXSTAT_STP|PCN_RXSTAT_ENP|PCN_RXSTAT_OWN;
-
-	return(0);
-}
-
-/*
- * A frame has been uploaded: pass the resulting mbuf chain up to
- * the higher level protocols.
- */
-static void
-pcn_rxeof(sc)
-	struct pcn_softc	*sc;
-{
-        struct mbuf		*m;
-        struct ifnet		*ifp;
-	struct pcn_rx_desc	*cur_rx;
-	int			i;
-
-	PCN_LOCK_ASSERT(sc);
-
-	ifp = sc->pcn_ifp;
-	i = sc->pcn_cdata.pcn_rx_prod;
-
-	while(PCN_OWN_RXDESC(&sc->pcn_ldata->pcn_rx_list[i])) {
-		cur_rx = &sc->pcn_ldata->pcn_rx_list[i];
-		m = sc->pcn_cdata.pcn_rx_chain[i];
-		sc->pcn_cdata.pcn_rx_chain[i] = NULL;
-
-		/*
-		 * If an error occurs, update stats, clear the
-		 * status word and leave the mbuf cluster in place:
-		 * it should simply get re-used next time this descriptor
-	 	 * comes up in the ring.
-		 */
-		if (cur_rx->pcn_rxstat & PCN_RXSTAT_ERR) {
-			ifp->if_ierrors++;
-			pcn_newbuf(sc, i, m);
-			PCN_INC(i, PCN_RX_LIST_CNT);
-			continue;
-		}
-
-		if (pcn_newbuf(sc, i, NULL)) {
-			/* Ran out of mbufs; recycle this one. */
-			pcn_newbuf(sc, i, m);
-			ifp->if_ierrors++;
-			PCN_INC(i, PCN_RX_LIST_CNT);
-			continue;
-		}
-
-		PCN_INC(i, PCN_RX_LIST_CNT);
-
-		/* No errors; receive the packet. */
-		ifp->if_ipackets++;
-		m->m_len = m->m_pkthdr.len =
-		    cur_rx->pcn_rxlen - ETHER_CRC_LEN;
-		m->m_pkthdr.rcvif = ifp;
-
-		PCN_UNLOCK(sc);
-		(*ifp->if_input)(ifp, m);
-		PCN_LOCK(sc);
-	}
-
-	sc->pcn_cdata.pcn_rx_prod = i;
-
-	return;
-}
-
-/*
- * A frame was downloaded to the chip. It's safe for us to clean up
- * the list buffers.
- */
-
-static void
-pcn_txeof(sc)
-	struct pcn_softc	*sc;
-{
-	struct pcn_tx_desc	*cur_tx = NULL;
-	struct ifnet		*ifp;
-	u_int32_t		idx;
-
-	ifp = sc->pcn_ifp;
-
-	/*
-	 * Go through our tx list and free mbufs for those
-	 * frames that have been transmitted.
-	 */
-	idx = sc->pcn_cdata.pcn_tx_cons;
-	while (idx != sc->pcn_cdata.pcn_tx_prod) {
-		cur_tx = &sc->pcn_ldata->pcn_tx_list[idx];
-
-		if (!PCN_OWN_TXDESC(cur_tx))
-			break;
-
-		if (!(cur_tx->pcn_txctl & PCN_TXCTL_ENP)) {
-			sc->pcn_cdata.pcn_tx_cnt--;
-			PCN_INC(idx, PCN_TX_LIST_CNT);
-			continue;
-		}
-
-		if (cur_tx->pcn_txctl & PCN_TXCTL_ERR) {
-			ifp->if_oerrors++;
-			if (cur_tx->pcn_txstat & PCN_TXSTAT_EXDEF)
-				ifp->if_collisions++;
-			if (cur_tx->pcn_txstat & PCN_TXSTAT_RTRY)
-				ifp->if_collisions++;
-		}
-
-		ifp->if_collisions +=
-		    cur_tx->pcn_txstat & PCN_TXSTAT_TRC;
-
-		ifp->if_opackets++;
-		if (sc->pcn_cdata.pcn_tx_chain[idx] != NULL) {
-			m_freem(sc->pcn_cdata.pcn_tx_chain[idx]);
-			sc->pcn_cdata.pcn_tx_chain[idx] = NULL;
-		}
-
-		sc->pcn_cdata.pcn_tx_cnt--;
-		PCN_INC(idx, PCN_TX_LIST_CNT);
-	}
-
-	if (idx != sc->pcn_cdata.pcn_tx_cons) {
-		/* Some buffers have been freed. */
-		sc->pcn_cdata.pcn_tx_cons = idx;
-		ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
-	}
-	ifp->if_timer = (sc->pcn_cdata.pcn_tx_cnt == 0) ? 0 : 5;
-
-	return;
-}
-
-static void
-pcn_tick(xsc)
-	void			*xsc;
-{
-	struct pcn_softc	*sc;
-	struct mii_data		*mii;
-	struct ifnet		*ifp;
-
-	sc = xsc;
-	ifp = sc->pcn_ifp;
-	PCN_LOCK_ASSERT(sc);
-
-	mii = device_get_softc(sc->pcn_miibus);
-	mii_tick(mii);
-
-	/* link just died */
-	if (sc->pcn_link & !(mii->mii_media_status & IFM_ACTIVE))
-		sc->pcn_link = 0;
-
-	/* link just came up, restart */
-	if (!sc->pcn_link && mii->mii_media_status & IFM_ACTIVE &&
-	    IFM_SUBTYPE(mii->mii_media_active) != IFM_NONE) {
-		sc->pcn_link++;
-		if (ifp->if_snd.ifq_head != NULL)
-			pcn_start_locked(ifp);
-	}
-
-	callout_reset(&sc->pcn_stat_callout, hz, pcn_tick, sc);
-
-	return;
-}
-
-static void
-pcn_intr(arg)
-	void			*arg;
-{
-	struct pcn_softc	*sc;
-	struct ifnet		*ifp;
-	u_int32_t		status;
-
-	sc = arg;
-	ifp = sc->pcn_ifp;
-
-	PCN_LOCK(sc);
-
-	/* Suppress unwanted interrupts */
-	if (!(ifp->if_flags & IFF_UP)) {
-		pcn_stop(sc);
-		PCN_UNLOCK(sc);
-		return;
-	}
-
-	CSR_WRITE_4(sc, PCN_IO32_RAP, PCN_CSR_CSR);
-
-	while ((status = CSR_READ_4(sc, PCN_IO32_RDP)) & PCN_CSR_INTR) {
-		CSR_WRITE_4(sc, PCN_IO32_RDP, status);
-
-		if (status & PCN_CSR_RINT)
-			pcn_rxeof(sc);
-
-		if (status & PCN_CSR_TINT)
-			pcn_txeof(sc);
-
-		if (status & PCN_CSR_ERR) {
-			pcn_init_locked(sc);
-			break;
-		}
-	}
-
-	if (ifp->if_snd.ifq_head != NULL)
-		pcn_start_locked(ifp);
-
-	PCN_UNLOCK(sc);
-	return;
-}
-
-/*
- * Encapsulate an mbuf chain in a descriptor by coupling the mbuf data
- * pointers to the fragment pointers.
- */
-static int
-pcn_encap(sc, m_head, txidx)
-	struct pcn_softc	*sc;
-	struct mbuf		*m_head;
-	u_int32_t		*txidx;
-{
-	struct pcn_tx_desc	*f = NULL;
-	struct mbuf		*m;
-	int			frag, cur, cnt = 0;
-
-	/*
- 	 * Start packing the mbufs in this chain into
-	 * the fragment pointers. Stop when we run out
- 	 * of fragments or hit the end of the mbuf chain.
-	 */
-	m = m_head;
-	cur = frag = *txidx;
-
-	for (m = m_head; m != NULL; m = m->m_next) {
-		if (m->m_len == 0)
-			continue;
-
-		if ((PCN_TX_LIST_CNT - (sc->pcn_cdata.pcn_tx_cnt + cnt)) < 2)
-			return(ENOBUFS);
-		f = &sc->pcn_ldata->pcn_tx_list[frag];
-		f->pcn_txctl = (~(m->m_len) + 1) & PCN_TXCTL_BUFSZ;
-		f->pcn_txctl |= PCN_TXCTL_MBO;
-		f->pcn_tbaddr = vtophys(mtod(m, vm_offset_t));
-		if (cnt == 0)
-			f->pcn_txctl |= PCN_TXCTL_STP;
-		else
-			f->pcn_txctl |= PCN_TXCTL_OWN;
-		cur = frag;
-		PCN_INC(frag, PCN_TX_LIST_CNT);
-		cnt++;
-	}
-
-	if (m != NULL)
-		return(ENOBUFS);
-
-	sc->pcn_cdata.pcn_tx_chain[cur] = m_head;
-	sc->pcn_ldata->pcn_tx_list[cur].pcn_txctl |=
-	    PCN_TXCTL_ENP|PCN_TXCTL_ADD_FCS|PCN_TXCTL_MORE_LTINT;
-	sc->pcn_ldata->pcn_tx_list[*txidx].pcn_txctl |= PCN_TXCTL_OWN;
-	sc->pcn_cdata.pcn_tx_cnt += cnt;
-	*txidx = frag;
-
-	return(0);
-}
-
-/*
- * Main transmit routine. To avoid having to do mbuf copies, we put pointers
- * to the mbuf data regions directly in the transmit lists. We also save a
- * copy of the pointers since the transmit list fragment pointers are
- * physical addresses.
- */
-static void
-pcn_start(ifp)
-	struct ifnet		*ifp;
-{
-	struct pcn_softc	*sc;
-
-	sc = ifp->if_softc;
-	PCN_LOCK(sc);
-	pcn_start_locked(ifp);
-	PCN_UNLOCK(sc);
-}
-
-static void
-pcn_start_locked(ifp)
-	struct ifnet		*ifp;
-{
-	struct pcn_softc	*sc;
-	struct mbuf		*m_head = NULL;
-	u_int32_t		idx;
-
-	sc = ifp->if_softc;
-
-	PCN_LOCK_ASSERT(sc);
-
-	if (!sc->pcn_link)
-		return;
-
-	idx = sc->pcn_cdata.pcn_tx_prod;
-
-	if (ifp->if_drv_flags & IFF_DRV_OACTIVE)
-		return;
-
-	while(sc->pcn_cdata.pcn_tx_chain[idx] == NULL) {
-		IF_DEQUEUE(&ifp->if_snd, m_head);
-		if (m_head == NULL)
-			break;
-
-		if (pcn_encap(sc, m_head, &idx)) {
-			IF_PREPEND(&ifp->if_snd, m_head);
-			ifp->if_drv_flags |= IFF_DRV_OACTIVE;
-			break;
-		}
-
-		/*
-		 * If there's a BPF listener, bounce a copy of this frame
-		 * to him.
-		 */
-		BPF_MTAP(ifp, m_head);
-
-	}
-
-	/* Transmit */
-	sc->pcn_cdata.pcn_tx_prod = idx;
-	pcn_csr_write(sc, PCN_CSR_CSR, PCN_CSR_TX|PCN_CSR_INTEN);
-
-	/*
-	 * Set a timeout in case the chip goes out to lunch.
-	 */
-	ifp->if_timer = 5;
-
-	return;
-}
-
-static void
-pcn_setfilt(ifp)
-	struct ifnet		*ifp;
-{
-	struct pcn_softc	*sc;
-
-	sc = ifp->if_softc;
-
-	 /* If we want promiscuous mode, set the allframes bit. */
-	if (ifp->if_flags & IFF_PROMISC) {
-		PCN_CSR_SETBIT(sc, PCN_CSR_MODE, PCN_MODE_PROMISC);
-	} else {
-		PCN_CSR_CLRBIT(sc, PCN_CSR_MODE, PCN_MODE_PROMISC);
-	}
-
-	/* Set the capture broadcast bit to capture broadcast frames. */
-	if (ifp->if_flags & IFF_BROADCAST) {
-		PCN_CSR_CLRBIT(sc, PCN_CSR_MODE, PCN_MODE_RXNOBROAD);
-	} else {
-		PCN_CSR_SETBIT(sc, PCN_CSR_MODE, PCN_MODE_RXNOBROAD);
-	}
-
-	return;
-}
-
-static void
-pcn_init(xsc)
-	void			*xsc;
-{
-	struct pcn_softc	*sc = xsc;
-
-	PCN_LOCK(sc);
-	pcn_init_locked(sc);
-	PCN_UNLOCK(sc);
-}
-
-static void
-pcn_init_locked(sc)
-	struct pcn_softc	*sc;
-{
-	struct ifnet		*ifp = sc->pcn_ifp;
-	struct mii_data		*mii = NULL;
-	struct ifmedia_entry	*ife;
-
-	PCN_LOCK_ASSERT(sc);
-
-	/*
-	 * Cancel pending I/O and free all RX/TX buffers.
-	 */
-	pcn_stop(sc);
-	pcn_reset(sc);
-
-	mii = device_get_softc(sc->pcn_miibus);
-	ife = mii->mii_media.ifm_cur;
-
-	/* Set MAC address */
-	pcn_csr_write(sc, PCN_CSR_PAR0,
-	    ((u_int16_t *)IF_LLADDR(sc->pcn_ifp))[0]);
-	pcn_csr_write(sc, PCN_CSR_PAR1,
-	    ((u_int16_t *)IF_LLADDR(sc->pcn_ifp))[1]);
-	pcn_csr_write(sc, PCN_CSR_PAR2,
-	    ((u_int16_t *)IF_LLADDR(sc->pcn_ifp))[2]);
-
-	/* Init circular RX list. */
-	if (pcn_list_rx_init(sc) == ENOBUFS) {
-		if_printf(ifp, "initialization failed: no "
-		    "memory for rx buffers\n");
-		pcn_stop(sc);
-		return;
-	}
-
-	/*
-	 * Init tx descriptors.
-	 */
-	pcn_list_tx_init(sc);
-
-	/* Clear PCN_MISC_ASEL so we can set the port via PCN_CSR_MODE. */
-	PCN_BCR_CLRBIT(sc, PCN_BCR_MISCCFG, PCN_MISC_ASEL);
-
-	/*
-	 * Set up the port based on the currently selected media.
-	 * For Am79C978 we've to unconditionally set PCN_PORT_MII and
-	 * set the PHY in PCN_BCR_PHYSEL instead.
-	 */
-	if (sc->pcn_type != Am79C978 &&
-	    IFM_INST(ife->ifm_media) == sc->pcn_inst_10bt)
-		pcn_csr_write(sc, PCN_CSR_MODE, PCN_PORT_10BASET);
-	else
-		pcn_csr_write(sc, PCN_CSR_MODE, PCN_PORT_MII);
-
-	/* Set up RX filter. */
-	pcn_setfilt(ifp);
-
-	/*
-	 * Load the multicast filter.
-	 */
-	pcn_setmulti(sc);
-
-	/*
-	 * Load the addresses of the RX and TX lists.
-	 */
-	pcn_csr_write(sc, PCN_CSR_RXADDR0,
-	    vtophys(&sc->pcn_ldata->pcn_rx_list[0]) & 0xFFFF);
-	pcn_csr_write(sc, PCN_CSR_RXADDR1,
-	    (vtophys(&sc->pcn_ldata->pcn_rx_list[0]) >> 16) & 0xFFFF);
-	pcn_csr_write(sc, PCN_CSR_TXADDR0,
-	    vtophys(&sc->pcn_ldata->pcn_tx_list[0]) & 0xFFFF);
-	pcn_csr_write(sc, PCN_CSR_TXADDR1,
-	    (vtophys(&sc->pcn_ldata->pcn_tx_list[0]) >> 16) & 0xFFFF);
-
-	/* Set the RX and TX ring sizes. */
-	pcn_csr_write(sc, PCN_CSR_RXRINGLEN, (~PCN_RX_LIST_CNT) + 1);
-	pcn_csr_write(sc, PCN_CSR_TXRINGLEN, (~PCN_TX_LIST_CNT) + 1);
-
-	/* We're not using the initialization block. */
-	pcn_csr_write(sc, PCN_CSR_IAB1, 0);
-
-	/* Enable fast suspend mode. */
-	PCN_CSR_SETBIT(sc, PCN_CSR_EXTCTL2, PCN_EXTCTL2_FASTSPNDE);
-
-	/*
-	 * Enable burst read and write. Also set the no underflow
-	 * bit. This will avoid transmit underruns in certain
-	 * conditions while still providing decent performance.
-	 */
-	PCN_BCR_SETBIT(sc, PCN_BCR_BUSCTL, PCN_BUSCTL_NOUFLOW|
-	    PCN_BUSCTL_BREAD|PCN_BUSCTL_BWRITE);
-
-	/* Enable graceful recovery from underflow. */
-	PCN_CSR_SETBIT(sc, PCN_CSR_IMR, PCN_IMR_DXSUFLO);
-
-	/* Enable auto-padding of short TX frames. */
-	PCN_CSR_SETBIT(sc, PCN_CSR_TFEAT, PCN_TFEAT_PAD_TX);
-
-	/* Disable MII autoneg (we handle this ourselves). */
-	PCN_BCR_SETBIT(sc, PCN_BCR_MIICTL, PCN_MIICTL_DANAS);
-
-	if (sc->pcn_type == Am79C978)
-		/* XXX support other PHYs? */
-		pcn_bcr_write(sc, PCN_BCR_PHYSEL,
-		    PCN_PHYSEL_PCNET|PCN_PHY_HOMEPNA);
-
-	/* Enable interrupts and start the controller running. */
-	pcn_csr_write(sc, PCN_CSR_CSR, PCN_CSR_INTEN|PCN_CSR_START);
-
-	mii_mediachg(mii);
-
-	ifp->if_drv_flags |= IFF_DRV_RUNNING;
-	ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
-
-	callout_reset(&sc->pcn_stat_callout, hz, pcn_tick, sc);
-
-	return;
-}
-
-/*
- * Set media options.
- */
-static int
-pcn_ifmedia_upd(ifp)
-	struct ifnet		*ifp;
-{
-	struct pcn_softc	*sc;
-
-	sc = ifp->if_softc;
-
-	PCN_LOCK(sc);
-
-	/*
-	 * At least Am79C971 with DP83840A can wedge when switching
-	 * from the internal 10baseT PHY to the external PHY without
-	 * issuing pcn_reset(). For setting the port in PCN_CSR_MODE
-	 * the PCnet chip has to be powered down or stopped anyway
-	 * and although documented otherwise it doesn't take effect
-	 * until the next initialization.
-	 */
-	sc->pcn_link = 0;
-	pcn_stop(sc);
-	pcn_reset(sc);
-	pcn_init_locked(sc);
-	if (ifp->if_snd.ifq_head != NULL)
-		pcn_start_locked(ifp);
-
-	PCN_UNLOCK(sc);
-
-	return(0);
-}
-
-/*
- * Report current media status.
- */
-static void
-pcn_ifmedia_sts(ifp, ifmr)
-	struct ifnet		*ifp;
-	struct ifmediareq	*ifmr;
-{
-	struct pcn_softc	*sc;
-	struct mii_data		*mii;
-
-	sc = ifp->if_softc;
-
-	mii = device_get_softc(sc->pcn_miibus);
-	PCN_LOCK(sc);
-	mii_pollstat(mii);
-	ifmr->ifm_active = mii->mii_media_active;
-	ifmr->ifm_status = mii->mii_media_status;
-	PCN_UNLOCK(sc);
-
-	return;
-}
-
-static int
-pcn_ioctl(ifp, command, data)
-	struct ifnet		*ifp;
-	u_long			command;
-	caddr_t			data;
-{
-	struct pcn_softc	*sc = ifp->if_softc;
-	struct ifreq		*ifr = (struct ifreq *) data;
-	struct mii_data		*mii = NULL;
-	int			error = 0;
-
-	switch(command) {
-	case SIOCSIFFLAGS:
-		PCN_LOCK(sc);
-		if (ifp->if_flags & IFF_UP) {
-                        if (ifp->if_drv_flags & IFF_DRV_RUNNING &&
-			    ifp->if_flags & IFF_PROMISC &&
-			    !(sc->pcn_if_flags & IFF_PROMISC)) {
-				PCN_CSR_SETBIT(sc, PCN_CSR_EXTCTL1,
-				    PCN_EXTCTL1_SPND);
-				pcn_setfilt(ifp);
-				PCN_CSR_CLRBIT(sc, PCN_CSR_EXTCTL1,
-				    PCN_EXTCTL1_SPND);
-				pcn_csr_write(sc, PCN_CSR_CSR,
-				    PCN_CSR_INTEN|PCN_CSR_START);
-			} else if (ifp->if_drv_flags & IFF_DRV_RUNNING &&
-			    !(ifp->if_flags & IFF_PROMISC) &&
-				sc->pcn_if_flags & IFF_PROMISC) {
-				PCN_CSR_SETBIT(sc, PCN_CSR_EXTCTL1,
-				    PCN_EXTCTL1_SPND);
-				pcn_setfilt(ifp);
-				PCN_CSR_CLRBIT(sc, PCN_CSR_EXTCTL1,
-				    PCN_EXTCTL1_SPND);
-				pcn_csr_write(sc, PCN_CSR_CSR,
-				    PCN_CSR_INTEN|PCN_CSR_START);
-			} else if (!(ifp->if_drv_flags & IFF_DRV_RUNNING))
-				pcn_init_locked(sc);
-		} else {
-			if (ifp->if_drv_flags & IFF_DRV_RUNNING)
-				pcn_stop(sc);
-		}
-		sc->pcn_if_flags = ifp->if_flags;
-		PCN_UNLOCK(sc);
-		error = 0;
-		break;
-	case SIOCADDMULTI:
-	case SIOCDELMULTI:
-		PCN_LOCK(sc);
-		pcn_setmulti(sc);
-		PCN_UNLOCK(sc);
-		error = 0;
-		break;
-	case SIOCGIFMEDIA:
-	case SIOCSIFMEDIA:
-		mii = device_get_softc(sc->pcn_miibus);
-		error = ifmedia_ioctl(ifp, ifr, &mii->mii_media, command);
-		break;
-	default:
-		error = ether_ioctl(ifp, command, data);
-		break;
-	}
-
-	return(error);
-}
-
-static void
-pcn_watchdog(ifp)
-	struct ifnet		*ifp;
-{
-	struct pcn_softc	*sc;
-
-	sc = ifp->if_softc;
-
-	PCN_LOCK(sc);
-
-	ifp->if_oerrors++;
-	if_printf(ifp, "watchdog timeout\n");
-
-	pcn_stop(sc);
-	pcn_reset(sc);
-	pcn_init_locked(sc);
-
-	if (ifp->if_snd.ifq_head != NULL)
-		pcn_start(ifp);
-
-	PCN_UNLOCK(sc);
-
-	return;
-}
-
-/*
- * Stop the adapter and free any mbufs allocated to the
- * RX and TX lists.
- */
-static void
-pcn_stop(sc)
-	struct pcn_softc	*sc;
-{
-	register int		i;
-	struct ifnet		*ifp;
-
-	PCN_LOCK_ASSERT(sc);
-	ifp = sc->pcn_ifp;
-	ifp->if_timer = 0;
-
-	callout_stop(&sc->pcn_stat_callout);
-
-	/* Turn off interrupts */
-	PCN_CSR_CLRBIT(sc, PCN_CSR_CSR, PCN_CSR_INTEN);
-	/* Stop adapter */
-	PCN_CSR_SETBIT(sc, PCN_CSR_CSR, PCN_CSR_STOP);
-	sc->pcn_link = 0;
-
-	/*
-	 * Free data in the RX lists.
-	 */
-	for (i = 0; i < PCN_RX_LIST_CNT; i++) {
-		if (sc->pcn_cdata.pcn_rx_chain[i] != NULL) {
-			m_freem(sc->pcn_cdata.pcn_rx_chain[i]);
-			sc->pcn_cdata.pcn_rx_chain[i] = NULL;
-		}
-	}
-	bzero((char *)&sc->pcn_ldata->pcn_rx_list,
-		sizeof(sc->pcn_ldata->pcn_rx_list));
-
-	/*
-	 * Free the TX list buffers.
-	 */
-	for (i = 0; i < PCN_TX_LIST_CNT; i++) {
-		if (sc->pcn_cdata.pcn_tx_chain[i] != NULL) {
-			m_freem(sc->pcn_cdata.pcn_tx_chain[i]);
-			sc->pcn_cdata.pcn_tx_chain[i] = NULL;
-		}
-	}
-
-	bzero((char *)&sc->pcn_ldata->pcn_tx_list,
-		sizeof(sc->pcn_ldata->pcn_tx_list));
-
-	ifp->if_drv_flags &= ~(IFF_DRV_RUNNING | IFF_DRV_OACTIVE);
-
-	return;
-}
-
-/*
- * Stop all chip I/O so that the kernel's probe routines don't
- * get confused by errant DMAs when rebooting.
- */
-static void
-pcn_shutdown(dev)
-	device_t		dev;
-{
-	struct pcn_softc	*sc;
-
-	sc = device_get_softc(dev);
-
-	PCN_LOCK(sc);
-	pcn_reset(sc);
-	pcn_stop(sc);
-	PCN_UNLOCK(sc);
-
-	return;
-}