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1/*-
2 * Copyright (c) 2000 Berkeley Software Design, Inc.
3 * Copyright (c) 1997, 1998, 1999, 2000
4 * Bill Paul <wpaul@osd.bsdi.com>. All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:

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27 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
28 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
29 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
30 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
31 * THE POSSIBILITY OF SUCH DAMAGE.
32 */
33
34#include <sys/cdefs.h>
35__FBSDID("$FreeBSD: head/sys/dev/pcn/if_pcn.c 195049 2009-06-26 11:45:06Z rwatson $");
35__FBSDID("$FreeBSD: head/sys/dev/pcn/if_pcn.c 199560 2009-11-19 22:14:23Z jhb $");
36
37/*
38 * AMD Am79c972 fast ethernet PCI NIC driver. Datasheets are available
39 * from http://www.amd.com.
40 *
41 * The AMD PCnet/PCI controllers are more advanced and functional
42 * versions of the venerable 7990 LANCE. The PCnet/PCI chips retain
43 * backwards compatibility with the LANCE and thus can be made

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138static void pcn_intr(void *);
139static void pcn_tick(void *);
140static void pcn_start(struct ifnet *);
141static void pcn_start_locked(struct ifnet *);
142static int pcn_ioctl(struct ifnet *, u_long, caddr_t);
143static void pcn_init(void *);
144static void pcn_init_locked(struct pcn_softc *);
145static void pcn_stop(struct pcn_softc *);
146static void pcn_watchdog(struct ifnet *);
146static void pcn_watchdog(struct pcn_softc *);
147static int pcn_shutdown(device_t);
148static int pcn_ifmedia_upd(struct ifnet *);
149static void pcn_ifmedia_sts(struct ifnet *, struct ifmediareq *);
150
151static int pcn_miibus_readreg(device_t, int, int);
152static int pcn_miibus_writereg(device_t, int, int, int);
153static void pcn_miibus_statchg(device_t);
154

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625 error = ENOSPC;
626 goto fail;
627 }
628 ifp->if_softc = sc;
629 if_initname(ifp, device_get_name(dev), device_get_unit(dev));
630 ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST;
631 ifp->if_ioctl = pcn_ioctl;
632 ifp->if_start = pcn_start;
633 ifp->if_watchdog = pcn_watchdog;
633 ifp->if_init = pcn_init;
634 ifp->if_snd.ifq_maxlen = PCN_TX_LIST_CNT - 1;
635
636 /*
637 * Do MII setup.
638 */
639 sc->pcn_extphyaddr = -1;
640 if (mii_phy_probe(dev, &sc->pcn_miibus,

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942 PCN_INC(idx, PCN_TX_LIST_CNT);
943 }
944
945 if (idx != sc->pcn_cdata.pcn_tx_cons) {
946 /* Some buffers have been freed. */
947 sc->pcn_cdata.pcn_tx_cons = idx;
948 ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
949 }
951 ifp->if_timer = (sc->pcn_cdata.pcn_tx_cnt == 0) ? 0 : 5;
950 sc->pcn_timer = (sc->pcn_cdata.pcn_tx_cnt == 0) ? 0 : 5;
951
952 return;
953}
954
955static void
956pcn_tick(xsc)
957 void *xsc;
958{

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974 /* link just came up, restart */
975 if (!sc->pcn_link && mii->mii_media_status & IFM_ACTIVE &&
976 IFM_SUBTYPE(mii->mii_media_active) != IFM_NONE) {
977 sc->pcn_link++;
978 if (ifp->if_snd.ifq_head != NULL)
979 pcn_start_locked(ifp);
980 }
981
982 if (sc->pcn_timer > 0 && --sc->pcn_timer == 0)
983 pcn_watchdog(sc);
984 callout_reset(&sc->pcn_stat_callout, hz, pcn_tick, sc);
985
986 return;
987}
988
989static void
990pcn_intr(arg)
991 void *arg;

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1143
1144 /* Transmit */
1145 sc->pcn_cdata.pcn_tx_prod = idx;
1146 pcn_csr_write(sc, PCN_CSR_CSR, PCN_CSR_TX|PCN_CSR_INTEN);
1147
1148 /*
1149 * Set a timeout in case the chip goes out to lunch.
1150 */
1150 ifp->if_timer = 5;
1151 sc->pcn_timer = 5;
1152
1153 return;
1154}
1155
1156static void
1157pcn_setfilt(ifp)
1158 struct ifnet *ifp;
1159{

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1425 error = ether_ioctl(ifp, command, data);
1426 break;
1427 }
1428
1429 return(error);
1430}
1431
1432static void
1432pcn_watchdog(ifp)
1433 struct ifnet *ifp;
1433pcn_watchdog(struct pcn_softc *sc)
1434{
1435 struct pcn_softc *sc;
1435 struct ifnet *ifp;
1436
1437 sc = ifp->if_softc;
1437 PCN_LOCK_ASSERT(sc);
1438 ifp = sc->pcn_ifp;
1439
1439 PCN_LOCK(sc);
1440
1440 ifp->if_oerrors++;
1441 if_printf(ifp, "watchdog timeout\n");
1442
1443 pcn_stop(sc);
1444 pcn_reset(sc);
1445 pcn_init_locked(sc);
1446
1447 if (ifp->if_snd.ifq_head != NULL)
1448 pcn_start_locked(ifp);
1450
1451 PCN_UNLOCK(sc);
1452
1453 return;
1449}
1450
1451/*
1452 * Stop the adapter and free any mbufs allocated to the
1453 * RX and TX lists.
1454 */
1455static void
1456pcn_stop(struct pcn_softc *sc)
1457{
1458 register int i;
1459 struct ifnet *ifp;
1460
1461 PCN_LOCK_ASSERT(sc);
1462 ifp = sc->pcn_ifp;
1468 ifp->if_timer = 0;
1463 sc->pcn_timer = 0;
1464
1465 callout_stop(&sc->pcn_stat_callout);
1466
1467 /* Turn off interrupts */
1468 PCN_CSR_CLRBIT(sc, PCN_CSR_CSR, PCN_CSR_INTEN);
1469 /* Stop adapter */
1470 PCN_CSR_SETBIT(sc, PCN_CSR_CSR, PCN_CSR_STOP);
1471 sc->pcn_link = 0;

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