Driver for the new SMC 9432TX cards.

Submitted by:	Ustimenko Semen <semen@iclub.nsu.ru>

1 files changed, 1051 insertions, 0 deletions

diff --git a/sys/dev/tx/if_tx.c b/sys/dev/tx/if_tx.c
new file mode 100644
index 000000000000..c2882cb6ebf2
--- /dev/null
+++ b/sys/dev/tx/if_tx.c
@@ -0,0 +1,1051 @@
+/*-
+ * Copyright (c) 1997 Semen Ustimenko (semen@iclub.nsu.ru)
+ * 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 THE AUTHOR OR CONTRIBUTORS 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.
+ *
+ * version: stable-163
+ *
+ */
+
+/*
+ * EtherPower II 10/100  Fast Ethernet (tx0)
+ * (aka SMC9432TX based on SMC83c170 EPIC chip)
+ *
+ * Written by Semen Ustimenko.
+ *
+ * TODO:
+ *	Add IFF_MULTICAST support
+ *	Fix serious collision counter behaviour
+ *	Fix RX_TO_MBUF option
+ *	
+ * stable-140:
+ *	first stable version
+ *
+ * stable-160:
+ *	added BPF support
+ *	fixed several bugs
+ *
+ * stable-161:
+ *	fixed BPF support
+ *	fixed several bugs
+ *
+ * stable-162:
+ *	fixed IFF_PROMISC mode support
+ *	added speed info displayed at startup (MII info)
+ *
+ * stable-163:
+ *	added media control code
+ */
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/mbuf.h>
+#include <sys/protosw.h>
+#include <sys/socket.h>
+#include <sys/errno.h>
+#include <sys/malloc.h>
+#include <sys/kernel.h>
+#include <sys/ioctl.h>			/* makes problem in FreeBSD 3.x */
+#include <machine/clock.h>
+#include <net/if.h>
+#include <net/if_dl.h>
+#include <net/if_mib.h>
+#include <net/if_types.h>
+#include <net/route.h>
+#include <net/netisr.h>
+#include <netinet/in.h>
+#include <netinet/in_systm.h>
+#include <netinet/in_var.h>
+#include <netinet/ip.h>
+#include <netinet/if_ether.h>
+#include <vm/vm.h>
+#include <vm/vm_param.h>
+#include <vm/vm_kern.h>
+#include <vm/pmap.h>
+
+#include "pci.h"
+#if NPCI > 0
+#include <pci/pcivar.h>
+#include <pci/smc83c170.h>
+#endif
+
+#include "bpfilter.h"
+#if NBPFILTER > 0
+#include <net/bpf.h>
+#include <net/bpfdesc.h>
+#endif
+
+/*
+ * Global variables
+ */
+static u_long epic_pci_count;
+static epic_softc_t * epics[EPIC_MAX_DEVICES];
+struct pci_device txdevice = { 
+	"tx",
+	epic_pci_probe,
+	epic_pci_attach,
+	&epic_pci_count,
+	NULL };
+
+/*
+ * Append this driver to pci drivers list
+ */
+DATA_SET ( pcidevice_set, txdevice );
+
+static int
+epic_ifioctl(register struct ifnet * ifp, int command, caddr_t data){
+	epic_softc_t *sc = ifp->if_softc;
+	struct ifreq *ifr = (struct ifreq *) data;
+	int x, error = 0;
+	u_int32_t media=0;
+	u_int32_t rxcon=0;
+
+	x = splimp();
+
+	switch (command) {
+
+	case SIOCSIFADDR:
+	case SIOCGIFADDR:
+		ether_ioctl(ifp, command, data);
+		break;
+
+	case SIOCSIFFLAGS:
+		/*
+		 * If the interface is marked up and stopped, then start it.
+		 * If it is marked down and running, then stop it.
+		 */
+		if (ifp->if_flags & IFF_UP) {
+			if ((ifp->if_flags & IFF_RUNNING) == 0)
+				epic_init(sc);
+		} else {
+			if (ifp->if_flags & IFF_RUNNING) {
+				epic_stop(sc);
+				ifp->if_flags &= ~IFF_RUNNING;
+			}
+		}
+
+		/* Set broadcast mode */
+		if( ifp->if_flags & IFF_BROADCAST )
+			rxcon |= RXCON_RECEIVE_BROADCAST_FRAMES;
+		else
+			rxcon &= ~RXCON_RECEIVE_BROADCAST_FRAMES;
+
+		/* Set media */
+
+		if( ifp->if_flags & IFF_NOAUTONEG ){
+			if( ifp->if_flags & IFF_100MB ) media |= 0x2000;
+			else media &= ~0x2000;
+
+			if( ifp->if_flags & IFF_FULLDUPLEX )
+				media |= 0x0100;
+			else
+				media &= ~0x0100;
+
+		} else {
+			media |= 0x1200;	/* Set and restart autoneg */
+		}
+
+#if NBPFILTER > 0
+		/* Set promisc mode */
+		if( ifp->if_flags & IFF_PROMISC )
+			sc->rxcon |= RXCON_PROMISCUOUS_MODE;
+		else
+			sc->rxcon &= ~RXCON_PROMISCUOUS_MODE;
+
+#endif
+		/*
+		 * Update hardware if media changed
+		 */
+		if( sc->media != media ){
+			if( media & 0x1000 ){
+				printf("tx%d: autonegotiation started\n",sc->unit);
+				epic_write_phy_register( sc->iobase, 0, (sc->media=media) );
+				ifp->if_timer=3;
+				sc->pending_txs++;
+			} else {
+				epic_write_phy_register( sc->iobase, 0, (sc->media=media) );
+				epic_update_if_media_flags(sc);
+				printf("tx%d: %dMbps %s\n",sc->unit,
+					(ifp->if_flags&IFF_100MB)?100:10,
+					(ifp->if_flags&IFF_FULLDUPLEX)?"full-duplex":"half-duplex" );
+			}
+		}
+
+		if( sc->rxcon != rxcon )
+			outl( sc->iobase + RXCON, (sc->rxcon = rxcon) );
+
+		break;
+
+#if 0				/* XXXXXXXX: no multicast filtering */
+	case SIOCADDMULTI:
+	case SIOCDELMULTI:
+		/*
+		 * Update out multicast list.
+		 */
+		error = (command == SIOCADDMULTI) ?
+		    ether_addmulti(ifr, &sc->arpcom) :
+		    ether_delmulti(ifr, &sc->arpcom);
+
+		if (error == ENETRESET) {
+
+			/*
+			 * Multicast list has changed; set the hardware filter
+			 * accordingly.
+			 */
+			ed_setrcr(sc);
+			error = 0;
+		}
+		break;
+#endif
+
+	case SIOCSIFMTU:
+		/*
+		 * Set the interface MTU.
+		 */
+		if (ifr->ifr_mtu > ETHERMTU) {
+			error = EINVAL;
+		} else {
+			ifp->if_mtu = ifr->ifr_mtu;
+		}
+		break;
+
+	default:
+		error = EINVAL;
+	}
+	splx(x);
+
+	return error;
+}
+
+/*
+ *  IFSTART function
+ */
+static void
+epic_ifstart(struct ifnet * const ifp){
+	epic_softc_t *sc = ifp->if_softc;
+
+	while( sc->pending_txs < TX_RING_SIZE  ){
+		int entry = sc->cur_tx % TX_RING_SIZE;
+		struct epic_tx_buffer * buf = sc->tx_buffer + entry;
+		struct mbuf *m,*m0;
+		int len;
+
+		if( buf->desc.status ) break;
+
+		IF_DEQUEUE( &(sc->epic_if.if_snd), m );
+
+		if( NULL == m ) return;
+
+		m0 = m;
+
+		for (len = 0; m != 0; m = m->m_next) {
+			bcopy(mtod(m, caddr_t), buf->data + len, m->m_len);
+			len += m->m_len;
+		}
+
+		buf->desc.txlength = max(len,ETHER_MIN_LEN-ETHER_CRC_LEN);
+		buf->desc.control = 0x14;	/* Interrupt when done */
+		buf->desc.status = 0x8000;	/* Pass ownership to the chip */
+
+		/* Set watchdog timer */
+		ifp->if_timer = 3;
+
+#if NBPFILTER > 0
+		if( ifp->if_bpf ) bpf_mtap( ifp, m0 );
+#endif
+
+		m_freem( m0 );
+
+		/* Trigger an immediate transmit demand. */
+		outl(sc->iobase + COMMAND, 0x0004);
+
+		sc->cur_tx = ( sc->cur_tx + 1 ) % TX_RING_SIZE;
+		sc->pending_txs++;
+	}
+
+#if defined(EPIC_DEBUG)
+	printf("tx%d: txring overflowed\n",sc->unit);
+#endif
+
+	sc->epic_if.if_flags |= IFF_OACTIVE;
+
+	return;
+	
+}
+
+/*
+ *  IFWATCHDOG function
+ */
+static void
+epic_ifwatchdog(
+    struct ifnet *ifp)
+{
+	epic_softc_t *sc = ifp->if_softc;
+	int x;
+	int i;
+
+	x = splimp();
+	if( sc->media & 0x0200 ){
+		i=epic_read_phy_register( sc->iobase, 0 );
+		if( i & 0x0200 ) {
+			printf("tx%d: autoneg failed\n",sc->unit);
+			sc->media=0xFFFFFFFF;
+		} else {
+			epic_update_if_media_flags(sc);
+			printf("tx%d: autonegotiated: %dMbps %s\n",sc->unit,
+				(ifp->if_flags&IFF_100MB)?100:10,
+				(ifp->if_flags&IFF_FULLDUPLEX)?"full-duplex":"half-duplex" );
+		}
+		sc->pending_txs--;
+		sc->media &= ~0x0200;
+	} else {
+		printf("tx%d: device timeout %d packets\n",
+				sc->unit,sc->pending_txs);
+
+		ifp->if_oerrors+=sc->pending_txs;
+
+		epic_stop(sc);
+		epic_init(sc);
+
+		epic_ifstart(&sc->epic_if);
+	}
+
+	splx(x);
+}
+
+/*
+ * Interrupt function
+ */
+static void
+epic_intr_normal(
+    void *arg)
+{
+	epic_softc_t * sc = (epic_softc_t *) arg;
+	int iobase = sc->iobase;
+        int status;
+	int i;
+
+	status = inl(iobase + INTSTAT);
+
+	/* Acknowledge all of the current interrupt sources ASAP. */
+	outl( iobase + INTSTAT, status & 0x00007fff);
+
+	if( status & (INTSTAT_RQE|INTSTAT_RCC|INTSTAT_OVW) )
+		epic_rx_done( sc );
+
+	if( status & (INTSTAT_TQE|INTSTAT_TCC|INTSTAT_TXU) )
+		epic_tx_done( sc );
+        /*
+	 * UPDATE statistics
+	 */
+	if (status & (INTSTAT_CNT | INTSTAT_TXU | INTSTAT_OVW | INTSTAT_RXE)) {
+		/*
+		 * update dot3 Rx statistics
+		 */
+		sc->dot3stats.dot3StatsMissedFrames += inb(iobase + MPCNT);
+		sc->dot3stats.dot3StatsFrameTooLongs += inb(iobase + ALICNT);
+		sc->dot3stats.dot3StatsFCSErrors += inb(iobase + CRCCNT);
+
+		/*
+		 * update if Rx statistics
+		 */
+		if (status & (INTSTAT_OVW | INTSTAT_RXE))
+			sc->epic_if.if_ierrors++;
+
+		/* Tx FIFO underflow. */
+		if (status & INTSTAT_TXU) {
+			sc->dot3stats.dot3StatsInternalMacTransmitErrors++;
+			sc->epic_if.if_oerrors++;
+#if defined(EPIC_DEBUG)
+			printf("tx%d: restart transmit\n",sc->unit);
+#endif
+			/* Restart the transmit process. */
+			outl(iobase + COMMAND, COMMAND_TXUGO);
+		}
+
+		/* Clear all error sources. */
+		outl(iobase + INTSTAT, status & 0x7f18);
+	}
+
+	/* If no packets are pending, thus no timeouts */
+	if( sc->pending_txs == 0 ){
+		sc->epic_if.if_timer = 0;
+		if( sc->cur_tx != sc->dirty_tx ){
+			printf("tx%d: algorithm error1\n",sc->unit);
+		}
+	}
+
+	/* We should clear all interrupt sources. */
+	outl(iobase + INTSTAT, 0x0001ffff );
+
+	return;
+}
+
+void
+epic_rx_done(
+	epic_softc_t *sc )
+{
+        int i = 0;
+	u_int16_t len;
+	struct epic_rx_buffer *	buf;
+	struct mbuf *m;
+	struct ether_header *eh;
+
+	while( !(sc->rx_buffer[sc->cur_rx].desc.status & 0x8000) && \
+		i++ < RX_RING_SIZE ){
+		int stt;
+
+		buf = sc->rx_buffer + sc->cur_rx;
+		stt = buf->desc.status;
+
+#if defined(EPIC_DEBUG)
+		printf("tx%d: ",sc->unit);
+		if(stt&1)printf("rsucc");
+		else printf("     ");
+		if(stt&2)printf(" faer");
+		else printf("     ");
+		if(stt&4)printf(" crer");
+		else printf("     ");
+		if(stt&8)printf(" mpac");
+		else printf("     ");
+		if(stt&16)printf(" mcas");
+		else printf("     ");
+		if(stt&32)printf(" bcas\n");
+		else printf("     \n");
+#endif
+
+		if( !(buf->desc.status&1) ){
+			sc->epic_if.if_ierrors++;
+			goto rxerror;
+		}
+
+		len = buf->desc.rxlength - ETHER_CRC_LEN;
+
+#if !defined(RX_TO_MBUF)
+		/*
+		 * Copy data to new allocated mbuf
+		 */
+		MGETHDR(m, M_DONTWAIT, MT_DATA);
+		if( NULL == m ) goto rxerror;
+		if( (len+2) > MHLEN ){
+			MCLGET(m,M_DONTWAIT);
+			if( NULL == (m->m_flags & M_EXT) ){
+				m_freem( m );
+				goto rxerror;
+			}
+		}	
+		m->m_data += 2;
+
+		memcpy( mtod(m,void*), buf->data, len );
+#else
+		m = buf->mbuf;
+
+		buf->mbuf = NULL;
+
+		MGETHDR(buf->mbuf,M_DONTWAIT,MT_DATA);
+		if( NULL == buf->mbuf )			/* XXXXX: to panic */
+			panic("tx: low mbufs");		/* or not to panic?*/
+		MCLGET(buf->mbuf,M_DONTWAIT);
+		if( NULL == buf->mbuf )
+			panic("tx: low mbufs");
+
+		buf->data = mtod( buf->mbuf, caddr_t );
+		buf->desc.bufaddr = vtophys( buf->data );
+		buf->desc.status = 0x8000;
+#endif
+
+		/*
+		 * First mbuf in packet holds the
+		 * ethernet and packet headers
+		 */
+		eh = mtod( m, struct ether_header * );
+		m->m_pkthdr.rcvif = &(sc->epic_if);
+		m->m_pkthdr.len = len;
+		m->m_len = len;
+
+#if NBPFILTER > 0
+		if( sc->epic_if.if_bpf ) bpf_mtap( &sc->epic_if, m );
+#if 0
+		/* Accept only our packets */
+		if( (eh->ether_dhost[0] & 1) == 0 &&
+		    bcmp(eh->ether_dhost,sc->epic_ac.ac_enaddr,ETHER_ADDR_LEN)){
+			m_freem(m);
+			goto rxerror;
+		}
+#endif
+#endif
+		m->m_pkthdr.len = len - sizeof(struct ether_header);
+		m->m_len = len - sizeof( struct ether_header );
+		m->m_data += sizeof( struct ether_header );
+
+#if defined(EPIC_DEBUG)
+		printf("tx%d: received %d bytes\n",sc->unit,len);
+#endif
+
+		ether_input(&sc->epic_if, eh, m);
+
+		sc->epic_if.if_ipackets++;
+
+rxerror:
+		/*
+		 * Mark descriptor as free
+		 */
+		buf->desc.rxlength = 0;
+		buf->desc.status = 0x8000;
+
+		sc->cur_rx = (sc->cur_rx+1) % RX_RING_SIZE;
+        }
+
+	epic_ifstart( &sc->epic_if );
+
+	outl( sc->iobase + INTSTAT, INTSTAT_RCC );
+}
+
+void
+epic_tx_done( epic_softc_t *sc ){
+	int i = 0;
+	u_int32_t if_flags=~0;
+	int coll;
+	u_int16_t stt;
+
+	while( i++ < TX_RING_SIZE ){
+		struct epic_tx_buffer *buf = sc->tx_buffer + sc->dirty_tx;
+		u_int16_t len = buf->desc.txlength;
+		stt =  buf->desc.status;
+
+		if( stt & 0x8000 )
+			break;	/* following packets are not Txed yet */
+
+		if( stt == 0 ){
+			if( sc->pending_txs != 0 ||
+			    sc->dirty_tx != sc->cur_tx ) 
+				printf("tx%d: algoritm error\n",sc->unit);
+			if_flags = ~IFF_OACTIVE;
+			break;
+		}
+
+#if defined(EPIC_DEBUG)
+		printf("tx%d: ",sc->unit);
+		if(stt&1) printf(" succ");
+		else printf("     ");
+		if(stt&2) printf(" ndef");
+		else printf("     ");
+		if(stt&4) printf(" coll");
+		else printf("     ");
+		if(stt&8) printf(" urun");
+		else printf("     ");
+		if(stt&16) printf(" cdhb");
+		else printf("     ");
+		if(stt&32) printf(" oowc");
+		else printf("     ");
+		if(stt&64) printf(" deff");
+		else printf("     ");
+		printf(" %d\n",(stt>>8)&0xF);
+#endif
+
+		sc->pending_txs--;		/* packet is finished */
+		sc->dirty_tx = (sc->dirty_tx + 1) % TX_RING_SIZE;
+
+		coll = (stt >> 8) & 0xF;	/* number of collisions*/
+
+		if( stt & 0x0001 ){
+			sc->epic_if.if_opackets++;
+		} else {
+			if(stt & 0x0008)
+				sc->dot3stats.dot3StatsCarrierSenseErrors++;
+
+			if(stt & 0x1050)
+				sc->dot3stats.dot3StatsInternalMacTransmitErrors++;
+
+			if(stt & 0x1000) coll = 16;
+
+			sc->epic_if.if_oerrors++;
+		} 
+
+		if(stt & 0x0002)	/* What does it mean? */
+			sc->dot3stats.dot3StatsDeferredTransmissions++;
+
+		sc->epic_if.if_collisions += coll;
+
+		switch( coll ){
+		case 0:
+			break;
+		case 16:
+			sc->dot3stats.dot3StatsExcessiveCollisions++;
+			sc->dot3stats.dot3StatsCollFrequencies[15]++;
+			break;
+		case 1:
+			sc->dot3stats.dot3StatsSingleCollisionFrames++;
+			sc->dot3stats.dot3StatsCollFrequencies[0]++;
+			break;
+		default:
+			sc->dot3stats.dot3StatsMultipleCollisionFrames++;
+			sc->dot3stats.dot3StatsCollFrequencies[coll-1]++;
+			break;
+		}
+
+		buf->desc.status = 0;
+
+		if_flags = ~IFF_OACTIVE;
+	}
+
+	sc->epic_if.if_flags &= if_flags;
+
+	outl( sc->iobase + INTSTAT, INTSTAT_TCC );
+
+	if( !(sc->epic_if.if_flags & IFF_OACTIVE) )
+		epic_ifstart( &sc->epic_if );
+}
+
+/*
+ * Probe function
+ */
+static char*
+epic_pci_probe(
+    pcici_t config_id,
+    pcidi_t device_id)
+{
+    if (PCI_VENDORID(device_id) != SMC_VENDORID)
+	return NULL;
+
+    if (PCI_CHIPID(device_id) == CHIPID_83C170)
+	return "SMC 83c170";
+
+    return NULL;
+}
+
+/*
+ * PCI_Attach function
+ */
+static void
+epic_pci_attach(
+    pcici_t config_id,
+    int unit)
+{
+	struct ifnet * ifp;
+	epic_softc_t *sc;
+	u_int32_t iobase;
+	u_int32_t irq;
+	int i;
+	int s;
+	int phy, phy_idx;
+
+	/*
+	 * Get iobase and irq level
+	 */
+	irq = PCI_CONF_READ(PCI_CFIT) & (0xFF);
+	if (!pci_map_port(config_id, PCI_CBIO,(u_short *) &iobase))
+		return;
+
+	/*
+	 * Allocate and preinitialize softc structure
+	 */
+	sc = (epic_softc_t *) malloc(sizeof(epic_softc_t), M_DEVBUF, M_NOWAIT);
+	if (sc == NULL)	return;
+	epics[ unit ] = sc;
+
+	/*
+	 * Zero softc structure
+	 */
+    	bzero(sc, sizeof(epic_softc_t));		
+
+	/*
+	 * Initialize softc
+	 */
+	sc->unit = unit;
+	sc->iobase = iobase;
+	sc->irq = irq;
+
+	/* Bring the chip out of low-power mode. */
+	outl( iobase + GENCTL, 0x0000 );
+
+	/* Magic?!  If we don't set this bit the MII interface won't work. */
+	outl( iobase + TEST1, 0x0008 );
+
+	/* Read mac address */
+	for (i = 0; i < ETHER_ADDR_LEN / sizeof( u_int16_t); i++)
+		((u_int16_t *)sc->epic_macaddr)[i] = inw(iobase + LAN0 + i*4);
+
+	printf("tx%d:",sc->unit);
+	printf(" address %02x:%02x:%02x:%02x:%02x:%02x,",sc->epic_macaddr[0],sc->epic_macaddr[1],sc->epic_macaddr[2],sc->epic_macaddr[3],sc->epic_macaddr[4],sc->epic_macaddr[5]);
+	printf(" type SMC9432TX [");
+	
+	i = epic_read_phy_register(iobase,0);
+	if( i & 0x1000 ) printf("Auto-Neg.");
+	if( i & 0x2000 ) printf(" 100 Mb/s");
+	else printf(" 10 Mb/s");
+	if( i & 0x100 ) printf(" Full-duplex");
+	else printf(" Half-duplex");
+	printf("]\n");
+
+	/*
+	 * Map interrupt
+	 */
+	if (!pci_map_int(config_id, epic_intr_normal, (void*) sc, &net_imask)) {
+		printf("tx%d: couldn't map interrupt\n",unit);
+		return;
+	}
+
+	/*
+	 * Fill ifnet structure
+	 */
+	s = splimp();
+
+	ifp = &sc->epic_if;
+
+	ifp->if_unit = unit;
+	ifp->if_name = "tx";
+	ifp->if_softc = sc;
+	ifp->if_flags = IFF_BROADCAST|IFF_SIMPLEX;	/*IFF_MULTICAST*/
+	ifp->if_ioctl = epic_ifioctl;
+	ifp->if_start = epic_ifstart;
+	ifp->if_watchdog = epic_ifwatchdog;
+	ifp->if_init = (if_init_f_t*)epic_init;
+	ifp->if_timer = 0;
+	ifp->if_output = ether_output;
+	ifp->if_linkmib = &sc->dot3stats;
+	ifp->if_linkmiblen = sizeof(struct ifmib_iso_8802_3);
+
+	sc->dot3stats.dot3StatsEtherChipSet =
+				DOT3CHIPSET(dot3VendorSMC,
+					    dot3ChipSetSMC83c170);
+
+	sc->dot3stats.dot3Compliance = DOT3COMPLIANCE_COLLS;
+
+	/*
+	 *  Attach to if manager
+	 */
+	if_attach(ifp);
+	ether_ifattach(ifp);
+
+#if NBPFILTER > 0
+	bpfattach(ifp,DLT_EN10MB, sizeof(struct ether_header));
+#endif
+
+	splx(s);
+
+	return;
+}
+
+/*
+ * IFINIT function
+ */
+static void
+epic_init(
+    epic_softc_t * sc)
+{       
+	struct ifnet *ifp = &sc->epic_if;
+	int iobase = sc->iobase;
+	int i;
+
+	/* Soft reset the chip. */
+	outl(iobase + GENCTL, GENCTL_SOFT_RESET );
+
+	/* Reset takes 15 ticks */
+	for(i=0;i<0x100;i++);
+
+	/* Wake up */
+	outl( iobase + GENCTL, 0 );
+
+	/* ?????? */
+	outl( iobase + TEST1, 0x0008);
+
+	/* Initialize rings or reinitialize */
+	epic_init_rings( sc );
+
+	epic_update_if_media_flags( sc );
+
+	/* Put node address to EPIC */
+	outl( iobase + LAN0 + 0x0, ((u_int16_t *)sc->epic_macaddr)[0] );
+        outl( iobase + LAN0 + 0x4, ((u_int16_t *)sc->epic_macaddr)[1] );
+	outl( iobase + LAN0 + 0x8, ((u_int16_t *)sc->epic_macaddr)[2] );
+
+	/* Enable interrupts,  set for PCI read multiple and etc */
+	sc->genctl = GENCTL_ENABLE_INTERRUPT | GENCTL_MEMORY_READ_MULTIPLE | \
+			GENCTL_ONECOPY | GENCTL_RECEIVE_FIFO_THRESHOLD128;
+
+	outl( iobase + GENCTL, sc->genctl );
+
+	/* Set transmit threshold */
+	outl( iobase + ETXTHR, 0x40 );
+
+	/* Compute rx mode. */
+	if( sc->epic_if.if_flags & IFF_BROADCAST )
+		sc->rxcon |= RXCON_RECEIVE_BROADCAST_FRAMES;
+	else
+		sc->rxcon &= ~RXCON_RECEIVE_BROADCAST_FRAMES;
+
+	if( sc->epic_if.if_flags & IFF_PROMISC )
+		sc->rxcon |= RXCON_PROMISCUOUS_MODE;
+	else
+		sc->rxcon &= ~RXCON_PROMISCUOUS_MODE;
+
+	/* Set rx and tx modes */
+	outl( iobase + RXCON, sc->rxcon );
+	outl( iobase + TXCON, sc->txcon );
+
+	/* Enable interrupts by setting the interrupt mask. */
+	outl( iobase + INTMASK, INTSTAT_CNT | INTSTAT_TXU | INTSTAT_TCC |
+		 INTSTAT_RXE | INTSTAT_OVW | INTSTAT_RQE | INTSTAT_RCC );
+
+	/* Start rx process */
+	outl( iobase + COMMAND, COMMAND_RXQUEUED | COMMAND_START_RX );
+
+	/* Mark interface running ... */
+	if( ifp->if_flags & IFF_UP ) ifp->if_flags |= IFF_RUNNING;
+	else ifp->if_flags &= ~IFF_RUNNING;
+
+	/* ... and free */
+	ifp->if_flags &= ~IFF_OACTIVE;
+
+}
+
+static void
+epic_stop(
+    epic_softc_t * sc)
+{
+	int iobase = sc->iobase;
+
+	sc->genctl &= ~GENCTL_ENABLE_INTERRUPT;
+	outl( iobase + INTMASK, 0 );
+	outl( iobase + COMMAND, COMMAND_STOP_RX | COMMAND_STOP_TDMA | \
+				COMMAND_STOP_TDMA );
+
+	sc->epic_if.if_timer = 0;
+
+}
+
+static void
+epic_update_if_media_flags(
+    epic_softc_t * sc)
+{
+	struct ifnet *ifp = &sc->epic_if;
+
+	/* Read media control */
+	sc->media = epic_read_phy_register(sc->iobase, 0);
+
+	/* AutoNegotiation */
+	if( sc->media & 0x1000 ) ifp->if_flags &= ~IFF_NOAUTONEG;
+	else ifp->if_flags |= IFF_NOAUTONEG;
+
+	/* fullduplex */
+	if( sc->media & 0x0100 ) {
+		ifp->if_flags |= IFF_FULLDUPLEX;
+		sc->txcon |= TXCON_LOOPBACK_MODE_FULL_DUPLEX;
+	} else {
+		ifp->if_flags &= ~IFF_FULLDUPLEX;
+		sc->txcon &= ~TXCON_LOOPBACK_MODE_FULL_DUPLEX;
+	}
+	outl( sc->iobase + TXCON, sc->txcon );
+
+	/* 10/100 MBit */
+	if( sc->media & 0x2000 ) {
+		ifp->if_flags |= IFF_100MB;
+		ifp->if_baudrate = 100000000;
+	} else {
+		ifp->if_flags &= ~IFF_100MB;
+		ifp->if_baudrate = 10000000;
+	}
+
+	return;
+}
+
+/*
+ * Initialize Rx ad Tx rings and give them to EPIC
+ *
+ * If RX_TO_MBUF option is enabled, mbuf cluster is allocated instead of
+ * static buffer.
+ */
+static void
+epic_init_rings(epic_softc_t * sc){
+	int i;
+	struct mbuf *m;
+
+	sc->cur_rx = sc->cur_tx = sc->dirty_tx = sc->pending_txs = 0;
+
+	for (i = 0; i < RX_RING_SIZE; i++) {
+		struct epic_rx_buffer *buf = sc->rx_buffer + i;
+
+		buf->desc.status = 0x0000;		/* Owned by Epic chip */
+		buf->desc.buflength = 0;
+		buf->desc.bufaddr = 0;
+		buf->desc.next = vtophys(&(sc->rx_buffer[(i+1)%RX_RING_SIZE].desc) );
+
+		buf->data = NULL;
+
+#if !defined(RX_TO_MBUF)
+		if( buf->pool ){
+			free( buf->pool, M_DEVBUF );
+			buf->pool = buf->data = 0;
+		}
+		buf->pool = malloc(ETHER_MAX_FRAME_LEN, M_DEVBUF, M_NOWAIT);
+		if( buf->pool == NULL ){
+			printf("tx%d: malloc failed\n",sc->unit);
+			continue;
+		}
+		buf->data = (caddr_t)((u_int32_t)(buf->pool + 3) & (~0x3));
+#else
+		if( buf->mbuf ){
+			m_freem( buf->mbuf );
+			buf->mbuf = NULL;
+		}
+		MGETHDR(buf->mbuf,M_DONTWAIT,MT_DATA);
+		if( NULL == buf->mbuf ) continue;
+		MCLGET(buf->mbuf,M_DONTWAIT);
+		if( NULL == (buf->mbuf->m_flags & M_EXT) ){
+			m_freem( buf->mbuf );
+			continue;
+		}
+
+		buf->data = mtod( buf->mbuf, caddr_t );
+#endif
+		buf->desc.bufaddr = vtophys( buf->data );
+		buf->desc.buflength = ETHER_MAX_FRAME_LEN;
+		buf->desc.status = 0x8000;
+
+	}
+
+	for (i = 0; i < TX_RING_SIZE; i++) {
+		struct epic_tx_buffer *buf = sc->tx_buffer + i;
+
+		buf->desc.status = 0x0000;
+		buf->desc.buflength = 0;
+		buf->desc.bufaddr = 0;
+		buf->desc.control = 0;
+		buf->desc.next = vtophys(&(sc->tx_buffer[(i+1)%TX_RING_SIZE].desc) );
+
+		if( buf->pool ){
+			free( buf->pool, M_DEVBUF );
+			buf->pool = buf->data = 0;
+		}
+
+		buf->pool = malloc(ETHER_MAX_FRAME_LEN, M_DEVBUF, M_NOWAIT);
+
+		if( buf->pool == NULL ){
+			printf("tx%d: malloc failed\n",sc->unit);
+			continue;
+		}
+
+		/* align on 4 bytes */
+		buf->data = (caddr_t)((u_int32_t)(buf->pool + 3) & (~0x3));
+
+		buf->desc.bufaddr = vtophys( buf->data );
+		buf->desc.buflength = ETHER_MAX_FRAME_LEN;
+	}
+
+	/* Give rings to EPIC */
+	outl( sc->iobase + PRCDAR, vtophys(&(sc->rx_buffer[0].desc)) );
+	outl( sc->iobase + PTCDAR, vtophys(&(sc->tx_buffer[0].desc)) );
+
+}
+
+/*
+ * EEPROM operation functions
+ */
+static void epic_write_eepromreg(u_int16_t regaddr, u_int8_t val){
+	u_int16_t i;
+
+	outb( regaddr, val );
+
+	for( i=0;i<0xFF; i++)
+		if( !(inb( regaddr ) & 0x20) ) break;
+
+	return;
+}
+
+static u_int8_t epic_read_eepromreg(u_int16_t regaddr){
+	return inb( regaddr );
+}  
+
+static u_int8_t epic_eeprom_clock( u_int16_t ioaddr, u_int8_t val ){
+
+	epic_write_eepromreg( ioaddr + EECTL, val );
+	epic_write_eepromreg( ioaddr + EECTL, (val | 0x4) );
+	epic_write_eepromreg( ioaddr + EECTL, val );
+	
+	return epic_read_eepromreg( ioaddr + EECTL );
+}
+
+static void epic_output_eepromw(u_int16_t ioaddr, u_int16_t val){
+	int i;          
+	for( i = 0xF; i >= 0; i--){
+		if( (val & (1 << i)) ) epic_eeprom_clock( ioaddr, 0x0B );
+		else epic_eeprom_clock( ioaddr, 3);
+	}
+}
+
+static u_int16_t epic_input_eepromw(u_int16_t ioaddr){
+	int i;
+	int tmp;
+	u_int16_t retval = 0;
+
+	for( i = 0xF; i >= 0; i--) {	
+		tmp = epic_eeprom_clock( ioaddr, 0x3 );
+		if( tmp & 0x10 ){
+			retval |= (1 << i);
+		}
+	}
+	return retval;
+}
+
+static int epic_read_eeprom(u_int16_t ioaddr, u_int16_t loc){
+	int i;
+	u_int16_t dataval;
+	u_int16_t read_cmd;
+
+	epic_write_eepromreg(ioaddr + EECTL , 3);
+
+	if( epic_read_eepromreg(ioaddr + EECTL) & 0x40 )
+		read_cmd = ( loc & 0x3F ) | 0x180;
+	else
+		read_cmd = ( loc & 0xFF ) | 0x600;
+
+	epic_output_eepromw( ioaddr, read_cmd );
+
+        dataval = epic_input_eepromw( ioaddr );
+
+	epic_write_eepromreg( ioaddr + EECTL, 1 );
+	
+	return dataval;
+}
+
+static int epic_read_phy_register(u_int16_t iobase, u_int16_t loc){
+	int i;
+
+	outl( iobase + MIICTL, ((loc << 4) | 0x0601) );
+
+	for( i=0;i<0x1000;i++) if( !(inl( iobase + MIICTL )&1) ) break;
+
+	return inl( iobase + MIIDATA );
+}
+
+static void epic_write_phy_register(u_int16_t iobase, u_int16_t loc,u_int16_t val){
+	int i;
+
+	outl( iobase + MIIDATA, val );
+	outl( iobase + MIICTL, ((loc << 4) | 0x0602) );
+
+	for( i=0;i<0x1000;i++) if( !(inl( iobase + MIICTL )&2) ) break;
+
+	return;
+}