FreeBSD/Linux Kernel Cross Reference
sys/dev/ic/tulip.c

     /*      $NetBSD: tulip.c,v 1.126.2.1 2005/01/11 06:44:30 jmc Exp $      */
     
     /*-
      * Copyright (c) 1998, 1999, 2000, 2002 The NetBSD Foundation, Inc.
      * All rights reserved.
      *
      * This code is derived from software contributed to The NetBSD Foundation
      * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
      * NASA Ames Research Center; and by Charles M. Hannum.
     *
     * 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 the NetBSD
     *      Foundation, Inc. and its contributors.
     * 4. Neither the name of The NetBSD Foundation nor the names of its
     *    contributors may be used to endorse or promote products derived
     *    from this software without specific prior written permission.
     *
     * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
     */
    
    /*
     * Device driver for the Digital Semiconductor ``Tulip'' (21x4x)
     * Ethernet controller family, and a variety of clone chips.
     */
    
    #include <sys/cdefs.h>
    __KERNEL_RCSID(0, "$NetBSD: tulip.c,v 1.126.2.1 2005/01/11 06:44:30 jmc Exp $");
    
    #include "bpfilter.h"
    
    #include <sys/param.h>
    #include <sys/systm.h> 
    #include <sys/callout.h>
    #include <sys/mbuf.h>   
    #include <sys/malloc.h>
    #include <sys/kernel.h>
    #include <sys/socket.h>
    #include <sys/ioctl.h>
    #include <sys/errno.h>
    #include <sys/device.h>
    
    #include <machine/endian.h>
    
    #include <uvm/uvm_extern.h>
     
    #include <net/if.h>
    #include <net/if_dl.h>
    #include <net/if_media.h>
    #include <net/if_ether.h>
    
    #if NBPFILTER > 0 
    #include <net/bpf.h>
    #endif 
    
    #include <machine/bus.h>
    #include <machine/intr.h>
    
    #include <dev/mii/mii.h>
    #include <dev/mii/miivar.h>
    #include <dev/mii/mii_bitbang.h>
    
    #include <dev/ic/tulipreg.h>
    #include <dev/ic/tulipvar.h>
    
    const char * const tlp_chip_names[] = TULIP_CHIP_NAMES;
    
    const struct tulip_txthresh_tab tlp_10_txthresh_tab[] =
        TLP_TXTHRESH_TAB_10;
    
    const struct tulip_txthresh_tab tlp_10_100_txthresh_tab[] =
        TLP_TXTHRESH_TAB_10_100;
    
    const struct tulip_txthresh_tab tlp_winb_txthresh_tab[] =
        TLP_TXTHRESH_TAB_WINB;
    
    const struct tulip_txthresh_tab tlp_dm9102_txthresh_tab[] =
        TLP_TXTHRESH_TAB_DM9102;
    
    void    tlp_start __P((struct ifnet *));
    void    tlp_watchdog __P((struct ifnet *));
   int     tlp_ioctl __P((struct ifnet *, u_long, caddr_t));
   int     tlp_init __P((struct ifnet *));
   void    tlp_stop __P((struct ifnet *, int));
   
   void    tlp_shutdown __P((void *));
   
   void    tlp_rxdrain __P((struct tulip_softc *));
   int     tlp_add_rxbuf __P((struct tulip_softc *, int));
   void    tlp_idle __P((struct tulip_softc *, u_int32_t));
   void    tlp_srom_idle __P((struct tulip_softc *));
   int     tlp_srom_size __P((struct tulip_softc *));
   
   int     tlp_enable __P((struct tulip_softc *));
   void    tlp_disable __P((struct tulip_softc *));
   void    tlp_power __P((int, void *));
   
   void    tlp_filter_setup __P((struct tulip_softc *));
   void    tlp_winb_filter_setup __P((struct tulip_softc *));
   void    tlp_al981_filter_setup __P((struct tulip_softc *));
   
   void    tlp_rxintr __P((struct tulip_softc *));
   void    tlp_txintr __P((struct tulip_softc *));
   
   void    tlp_mii_tick __P((void *));
   void    tlp_mii_statchg __P((struct device *));
   void    tlp_winb_mii_statchg __P((struct device *));
   void    tlp_dm9102_mii_statchg __P((struct device *));
   
   void    tlp_mii_getmedia __P((struct tulip_softc *, struct ifmediareq *));
   int     tlp_mii_setmedia __P((struct tulip_softc *));
   
   int     tlp_bitbang_mii_readreg __P((struct device *, int, int));
   void    tlp_bitbang_mii_writereg __P((struct device *, int, int, int));
   
   int     tlp_pnic_mii_readreg __P((struct device *, int, int));
   void    tlp_pnic_mii_writereg __P((struct device *, int, int, int));
   
   int     tlp_al981_mii_readreg __P((struct device *, int, int));
   void    tlp_al981_mii_writereg __P((struct device *, int, int, int));
   
   void    tlp_2114x_preinit __P((struct tulip_softc *));
   void    tlp_2114x_mii_preinit __P((struct tulip_softc *));
   void    tlp_pnic_preinit __P((struct tulip_softc *));
   void    tlp_dm9102_preinit __P((struct tulip_softc *));
   
   void    tlp_21140_reset __P((struct tulip_softc *));
   void    tlp_21142_reset __P((struct tulip_softc *));
   void    tlp_pmac_reset __P((struct tulip_softc *));
   void    tlp_dm9102_reset __P((struct tulip_softc *));
   
   void    tlp_2114x_nway_tick __P((void *));
   
   #define tlp_mchash(addr, sz)                                            \
           (ether_crc32_le((addr), ETHER_ADDR_LEN) & ((sz) - 1))
   
   /*
    * MII bit-bang glue.
    */
   u_int32_t tlp_sio_mii_bitbang_read __P((struct device *));
   void    tlp_sio_mii_bitbang_write __P((struct device *, u_int32_t));
   
   const struct mii_bitbang_ops tlp_sio_mii_bitbang_ops = {
           tlp_sio_mii_bitbang_read,
           tlp_sio_mii_bitbang_write,
           {
                   MIIROM_MDO,             /* MII_BIT_MDO */
                   MIIROM_MDI,             /* MII_BIT_MDI */
                   MIIROM_MDC,             /* MII_BIT_MDC */
                   0,                      /* MII_BIT_DIR_HOST_PHY */
                   MIIROM_MIIDIR,          /* MII_BIT_DIR_PHY_HOST */
           }
   };
   
   #ifdef TLP_DEBUG
   #define DPRINTF(sc, x)  if ((sc)->sc_ethercom.ec_if.if_flags & IFF_DEBUG) \
                                   printf x
   #else
   #define DPRINTF(sc, x)  /* nothing */
   #endif
   
   #ifdef TLP_STATS
   void    tlp_print_stats __P((struct tulip_softc *));
   #endif
   
   /*
    * Can be used to debug the SROM-related things, including contents.
    * Initialized so that it's patchable.
    */
   int     tlp_srom_debug = 0;
   
   /*
    * tlp_attach:
    *
    *      Attach a Tulip interface to the system.
    */
   void
   tlp_attach(sc, enaddr)
           struct tulip_softc *sc;
           const u_int8_t *enaddr;
   {
           struct ifnet *ifp = &sc->sc_ethercom.ec_if;
           int i, error;
   
           callout_init(&sc->sc_nway_callout);
           callout_init(&sc->sc_tick_callout);
   
           /*
            * NOTE: WE EXPECT THE FRONT-END TO INITIALIZE sc_regshift!
            */
   
           /*
            * Setup the transmit threshold table.
            */
           switch (sc->sc_chip) {
           case TULIP_CHIP_DE425:
           case TULIP_CHIP_21040:
           case TULIP_CHIP_21041:
                   sc->sc_txth = tlp_10_txthresh_tab;
                   break;
   
           case TULIP_CHIP_DM9102:
           case TULIP_CHIP_DM9102A:
                   sc->sc_txth = tlp_dm9102_txthresh_tab;
                   break;
   
           default:
                   sc->sc_txth = tlp_10_100_txthresh_tab;
                   break;
           }
   
           /*
            * Setup the filter setup function.
            */
           switch (sc->sc_chip) {
           case TULIP_CHIP_WB89C840F:
                   sc->sc_filter_setup = tlp_winb_filter_setup;
                   break;
   
           case TULIP_CHIP_AL981:
           case TULIP_CHIP_AN983:
           case TULIP_CHIP_AN985:
                   sc->sc_filter_setup = tlp_al981_filter_setup;
                   break;
   
           default:
                   sc->sc_filter_setup = tlp_filter_setup;
                   break;
           }
   
           /*
            * Set up the media status change function.
            */
           switch (sc->sc_chip) {
           case TULIP_CHIP_WB89C840F:
                   sc->sc_statchg = tlp_winb_mii_statchg;
                   break;
   
           case TULIP_CHIP_DM9102:
           case TULIP_CHIP_DM9102A:
                   sc->sc_statchg = tlp_dm9102_mii_statchg;
                   break;
   
           default:
                   /*
                    * We may override this if we have special media
                    * handling requirements (e.g. flipping GPIO pins).
                    *
                    * The pure-MII statchg function covers the basics.
                    */
                   sc->sc_statchg = tlp_mii_statchg;
                   break;
           }
   
           /*
            * Default to no FS|LS in setup packet descriptors.  They're
            * supposed to be zero according to the 21040 and 21143
            * manuals, and some chips fall over badly if they're
            * included.  Yet, other chips seem to require them.  Sigh.
            */
           switch (sc->sc_chip) {
           case TULIP_CHIP_X3201_3:
                   sc->sc_setup_fsls = TDCTL_Tx_FS|TDCTL_Tx_LS;
                   break;
   
           default:
                   sc->sc_setup_fsls = 0;
           }
   
           /*
            * Set up various chip-specific quirks.
            *
            * Note that wherever we can, we use the "ring" option for
            * transmit and receive descriptors.  This is because some
            * clone chips apparently have problems when using chaining,
            * although some *only* support chaining.
            *
            * What we do is always program the "next" pointer, and then
            * conditionally set the TDCTL_CH and TDCTL_ER bits in the
            * appropriate places.
            */
           switch (sc->sc_chip) {
           case TULIP_CHIP_21140:
           case TULIP_CHIP_21140A:
           case TULIP_CHIP_21142:
           case TULIP_CHIP_21143:
           case TULIP_CHIP_82C115:         /* 21143-like */
           case TULIP_CHIP_MX98713:        /* 21140-like */
           case TULIP_CHIP_MX98713A:       /* 21143-like */
           case TULIP_CHIP_MX98715:        /* 21143-like */
           case TULIP_CHIP_MX98715A:       /* 21143-like */
           case TULIP_CHIP_MX98715AEC_X:   /* 21143-like */
           case TULIP_CHIP_MX98725:        /* 21143-like */
                   /*
                    * Run these chips in ring mode.
                    */
                   sc->sc_tdctl_ch = 0;
                   sc->sc_tdctl_er = TDCTL_ER;
                   sc->sc_preinit = tlp_2114x_preinit;
                   break;
   
           case TULIP_CHIP_82C168:
           case TULIP_CHIP_82C169:
                   /*
                    * Run these chips in ring mode.
                    */
                   sc->sc_tdctl_ch = 0;
                   sc->sc_tdctl_er = TDCTL_ER;
                   sc->sc_preinit = tlp_pnic_preinit;
   
                   /*
                    * These chips seem to have busted DMA engines; just put them
                    * in Store-and-Forward mode from the get-go.
                    */
                   sc->sc_txthresh = TXTH_SF;
                   break;
   
           case TULIP_CHIP_WB89C840F:
                   /*
                    * Run this chip in chained mode.
                    */
                   sc->sc_tdctl_ch = TDCTL_CH;
                   sc->sc_tdctl_er = 0;
                   sc->sc_flags |= TULIPF_IC_FS;
                   break;
   
           case TULIP_CHIP_DM9102:
           case TULIP_CHIP_DM9102A:
                   /*
                    * Run these chips in chained mode.
                    */
                   sc->sc_tdctl_ch = TDCTL_CH;
                   sc->sc_tdctl_er = 0;
                   sc->sc_preinit = tlp_dm9102_preinit;
   
                   /*
                    * These chips have a broken bus interface, so we
                    * can't use any optimized bus commands.  For this
                    * reason, we tend to underrun pretty quickly, so
                    * just to Store-and-Forward mode from the get-go.
                    */
                   sc->sc_txthresh = TXTH_DM9102_SF;
                   break;
   
           default:
                   /*
                    * Default to running in ring mode.
                    */
                   sc->sc_tdctl_ch = 0;
                   sc->sc_tdctl_er = TDCTL_ER;
           }
   
           /*
            * Set up the MII bit-bang operations.
            */
           switch (sc->sc_chip) {
           case TULIP_CHIP_WB89C840F:      /* XXX direction bit different? */
                   sc->sc_bitbang_ops = &tlp_sio_mii_bitbang_ops;
                   break;
   
           default:
                   sc->sc_bitbang_ops = &tlp_sio_mii_bitbang_ops;
           }
   
           SIMPLEQ_INIT(&sc->sc_txfreeq);
           SIMPLEQ_INIT(&sc->sc_txdirtyq);
   
           /*
            * Allocate the control data structures, and create and load the
            * DMA map for it.
            */
           if ((error = bus_dmamem_alloc(sc->sc_dmat,
               sizeof(struct tulip_control_data), PAGE_SIZE, 0, &sc->sc_cdseg,
               1, &sc->sc_cdnseg, 0)) != 0) {
                   printf("%s: unable to allocate control data, error = %d\n",
                       sc->sc_dev.dv_xname, error);
                   goto fail_0;
           }
   
           if ((error = bus_dmamem_map(sc->sc_dmat, &sc->sc_cdseg, sc->sc_cdnseg,
               sizeof(struct tulip_control_data), (caddr_t *)&sc->sc_control_data,
               BUS_DMA_COHERENT)) != 0) {
                   printf("%s: unable to map control data, error = %d\n",
                       sc->sc_dev.dv_xname, error);
                   goto fail_1;
           }
   
           if ((error = bus_dmamap_create(sc->sc_dmat,
               sizeof(struct tulip_control_data), 1,
               sizeof(struct tulip_control_data), 0, 0, &sc->sc_cddmamap)) != 0) {
                   printf("%s: unable to create control data DMA map, "
                       "error = %d\n", sc->sc_dev.dv_xname, error);
                   goto fail_2;
           }
   
           if ((error = bus_dmamap_load(sc->sc_dmat, sc->sc_cddmamap,
               sc->sc_control_data, sizeof(struct tulip_control_data), NULL,
               0)) != 0) {
                   printf("%s: unable to load control data DMA map, error = %d\n",
                       sc->sc_dev.dv_xname, error);
                   goto fail_3;
           }
   
           /*
            * Create the transmit buffer DMA maps.
            *
            * Note that on the Xircom clone, transmit buffers must be
            * 4-byte aligned.  We're almost guaranteed to have to copy
            * the packet in that case, so we just limit ourselves to
            * one segment.
            *
            * On the DM9102, the transmit logic can only handle one
            * DMA segment.
            */
           switch (sc->sc_chip) {
           case TULIP_CHIP_X3201_3:
           case TULIP_CHIP_DM9102:
           case TULIP_CHIP_DM9102A:
                   sc->sc_ntxsegs = 1;
                   break;
   
           default:
                   sc->sc_ntxsegs = TULIP_NTXSEGS;
           }
           for (i = 0; i < TULIP_TXQUEUELEN; i++) {
                   if ((error = bus_dmamap_create(sc->sc_dmat, MCLBYTES,
                       sc->sc_ntxsegs, MCLBYTES, 0, 0,
                       &sc->sc_txsoft[i].txs_dmamap)) != 0) {
                           printf("%s: unable to create tx DMA map %d, "
                               "error = %d\n", sc->sc_dev.dv_xname, i, error);
                           goto fail_4;
                   }
           }
   
           /*
            * Create the receive buffer DMA maps.
            */
           for (i = 0; i < TULIP_NRXDESC; i++) {
                   if ((error = bus_dmamap_create(sc->sc_dmat, MCLBYTES, 1,
                       MCLBYTES, 0, 0, &sc->sc_rxsoft[i].rxs_dmamap)) != 0) {
                           printf("%s: unable to create rx DMA map %d, "
                               "error = %d\n", sc->sc_dev.dv_xname, i, error);
                           goto fail_5;
                   }
                   sc->sc_rxsoft[i].rxs_mbuf = NULL;
           }
   
           /*
            * From this point forward, the attachment cannot fail.  A failure
            * before this point releases all resources that may have been
            * allocated.
            */
           sc->sc_flags |= TULIPF_ATTACHED;
   
           /*
            * Reset the chip to a known state.
            */
           tlp_reset(sc);
   
           /* Announce ourselves. */
           printf("%s: %s%sEthernet address %s\n", sc->sc_dev.dv_xname,
               sc->sc_name[0] != '\0' ? sc->sc_name : "",
               sc->sc_name[0] != '\0' ? ", " : "",
               ether_sprintf(enaddr));
   
           /*
            * Check to see if we're the simulated Ethernet on Connectix
            * Virtual PC.
            */
           if (enaddr[0] == 0x00 && enaddr[1] == 0x03 && enaddr[2] == 0xff)
                   sc->sc_flags |= TULIPF_VPC;
   
           /*
            * Initialize our media structures.  This may probe the MII, if
            * present.
            */
           (*sc->sc_mediasw->tmsw_init)(sc);
   
           strcpy(ifp->if_xname, sc->sc_dev.dv_xname);
           ifp->if_softc = sc;
           ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST;
           ifp->if_ioctl = tlp_ioctl;
           ifp->if_start = tlp_start;
           ifp->if_watchdog = tlp_watchdog;
           ifp->if_init = tlp_init;
           ifp->if_stop = tlp_stop;
           IFQ_SET_READY(&ifp->if_snd);
   
           /*
            * We can support 802.1Q VLAN-sized frames.
            */
           sc->sc_ethercom.ec_capabilities |= ETHERCAP_VLAN_MTU;
   
           /*
            * Attach the interface.
            */
           if_attach(ifp);
           ether_ifattach(ifp, enaddr);
   #if NRND > 0
           rnd_attach_source(&sc->sc_rnd_source, sc->sc_dev.dv_xname,
               RND_TYPE_NET, 0);
   #endif
   
           /*
            * Make sure the interface is shutdown during reboot.
            */
           sc->sc_sdhook = shutdownhook_establish(tlp_shutdown, sc);
           if (sc->sc_sdhook == NULL)
                   printf("%s: WARNING: unable to establish shutdown hook\n",
                       sc->sc_dev.dv_xname);
   
           /*
            * Add a suspend hook to make sure we come back up after a
            * resume.
            */
           sc->sc_powerhook = powerhook_establish(tlp_power, sc);
           if (sc->sc_powerhook == NULL)
                   printf("%s: WARNING: unable to establish power hook\n",
                       sc->sc_dev.dv_xname);
           return;
   
           /*
            * Free any resources we've allocated during the failed attach
            * attempt.  Do this in reverse order and fall through.
            */
    fail_5:
           for (i = 0; i < TULIP_NRXDESC; i++) {
                   if (sc->sc_rxsoft[i].rxs_dmamap != NULL)
                           bus_dmamap_destroy(sc->sc_dmat,
                               sc->sc_rxsoft[i].rxs_dmamap);
           }
    fail_4:
           for (i = 0; i < TULIP_TXQUEUELEN; i++) {
                   if (sc->sc_txsoft[i].txs_dmamap != NULL)
                           bus_dmamap_destroy(sc->sc_dmat,
                               sc->sc_txsoft[i].txs_dmamap);
           }
           bus_dmamap_unload(sc->sc_dmat, sc->sc_cddmamap);
    fail_3:
           bus_dmamap_destroy(sc->sc_dmat, sc->sc_cddmamap);
    fail_2:
           bus_dmamem_unmap(sc->sc_dmat, (caddr_t)sc->sc_control_data,
               sizeof(struct tulip_control_data));
    fail_1:
           bus_dmamem_free(sc->sc_dmat, &sc->sc_cdseg, sc->sc_cdnseg);
    fail_0:
           return;
   }
   
   /*
    * tlp_activate:
    *
    *      Handle device activation/deactivation requests.
    */
   int
   tlp_activate(self, act)
           struct device *self;
           enum devact act;
   {
           struct tulip_softc *sc = (void *) self;
           int s, error = 0;
   
           s = splnet();
           switch (act) {
           case DVACT_ACTIVATE:
                   error = EOPNOTSUPP;
                   break;
   
           case DVACT_DEACTIVATE:
                   if (sc->sc_flags & TULIPF_HAS_MII)
                           mii_activate(&sc->sc_mii, act, MII_PHY_ANY,
                               MII_OFFSET_ANY);
                   if_deactivate(&sc->sc_ethercom.ec_if);
                   break;
           }
           splx(s);
   
           return (error);
   }
   
   /*
    * tlp_detach:
    *
    *      Detach a Tulip interface.
    */
   int
   tlp_detach(sc)
           struct tulip_softc *sc;
   {
           struct ifnet *ifp = &sc->sc_ethercom.ec_if;
           struct tulip_rxsoft *rxs;
           struct tulip_txsoft *txs;
           int i;
   
           /*
            * Succeed now if there isn't any work to do.
            */
           if ((sc->sc_flags & TULIPF_ATTACHED) == 0)
                   return (0);
   
           /* Unhook our tick handler. */
           if (sc->sc_tick)
                   callout_stop(&sc->sc_tick_callout);
   
           if (sc->sc_flags & TULIPF_HAS_MII) {
                   /* Detach all PHYs */
                   mii_detach(&sc->sc_mii, MII_PHY_ANY, MII_OFFSET_ANY);
           }
   
           /* Delete all remaining media. */
           ifmedia_delete_instance(&sc->sc_mii.mii_media, IFM_INST_ANY);
   
   #if NRND > 0
           rnd_detach_source(&sc->sc_rnd_source);
   #endif
           ether_ifdetach(ifp);
           if_detach(ifp);
   
           for (i = 0; i < TULIP_NRXDESC; i++) {
                   rxs = &sc->sc_rxsoft[i];
                   if (rxs->rxs_mbuf != NULL) {
                           bus_dmamap_unload(sc->sc_dmat, rxs->rxs_dmamap);
                           m_freem(rxs->rxs_mbuf);
                           rxs->rxs_mbuf = NULL;
                   }
                   bus_dmamap_destroy(sc->sc_dmat, rxs->rxs_dmamap);
           }
           for (i = 0; i < TULIP_TXQUEUELEN; i++) {
                   txs = &sc->sc_txsoft[i];
                   if (txs->txs_mbuf != NULL) {
                           bus_dmamap_unload(sc->sc_dmat, txs->txs_dmamap);
                           m_freem(txs->txs_mbuf);
                           txs->txs_mbuf = NULL;
                   }
                   bus_dmamap_destroy(sc->sc_dmat, txs->txs_dmamap);
           }
           bus_dmamap_unload(sc->sc_dmat, sc->sc_cddmamap);
           bus_dmamap_destroy(sc->sc_dmat, sc->sc_cddmamap);
           bus_dmamem_unmap(sc->sc_dmat, (caddr_t)sc->sc_control_data,
               sizeof(struct tulip_control_data));
           bus_dmamem_free(sc->sc_dmat, &sc->sc_cdseg, sc->sc_cdnseg);
   
           shutdownhook_disestablish(sc->sc_sdhook);
           powerhook_disestablish(sc->sc_powerhook);
   
           if (sc->sc_srom)
                   free(sc->sc_srom, M_DEVBUF);
   
           return (0);
   }
   
   /*
    * tlp_shutdown:
    *
    *      Make sure the interface is stopped at reboot time.
    */
   void
   tlp_shutdown(arg)
           void *arg;
   {
           struct tulip_softc *sc = arg;
   
           tlp_stop(&sc->sc_ethercom.ec_if, 1);
   }
   
   /*
    * tlp_start:           [ifnet interface function]
    *
    *      Start packet transmission on the interface.
    */
   void
   tlp_start(ifp)
           struct ifnet *ifp;
   {
           struct tulip_softc *sc = ifp->if_softc;
           struct mbuf *m0, *m;
           struct tulip_txsoft *txs, *last_txs = NULL;
           bus_dmamap_t dmamap;
           int error, firsttx, nexttx, lasttx = 1, ofree, seg;
   
           DPRINTF(sc, ("%s: tlp_start: sc_flags 0x%08x, if_flags 0x%08x\n",
               sc->sc_dev.dv_xname, sc->sc_flags, ifp->if_flags));
   
           /*
            * If we want a filter setup, it means no more descriptors were
            * available for the setup routine.  Let it get a chance to wedge
            * itself into the ring.
            */
           if (sc->sc_flags & TULIPF_WANT_SETUP)
                   ifp->if_flags |= IFF_OACTIVE;
   
           if ((ifp->if_flags & (IFF_RUNNING|IFF_OACTIVE)) != IFF_RUNNING)
                   return;
   
           if (sc->sc_tick == tlp_2114x_nway_tick &&
               (sc->sc_flags & TULIPF_LINK_UP) == 0 && ifp->if_snd.ifq_len < 10)
                   return;
   
           /*
            * Remember the previous number of free descriptors and
            * the first descriptor we'll use.
            */
           ofree = sc->sc_txfree;
           firsttx = sc->sc_txnext;
   
           DPRINTF(sc, ("%s: tlp_start: txfree %d, txnext %d\n",
               sc->sc_dev.dv_xname, ofree, firsttx));
   
           /*
            * Loop through the send queue, setting up transmit descriptors
            * until we drain the queue, or use up all available transmit
            * descriptors.
            */
           while ((txs = SIMPLEQ_FIRST(&sc->sc_txfreeq)) != NULL &&
                  sc->sc_txfree != 0) {
                   /*
                    * Grab a packet off the queue.
                    */
                   IFQ_POLL(&ifp->if_snd, m0);
                   if (m0 == NULL)
                           break;
                   m = NULL;
   
                   dmamap = txs->txs_dmamap;
   
                   /*
                    * Load the DMA map.  If this fails, the packet either
                    * didn't fit in the alloted number of segments, or we were
                    * short on resources.  In this case, we'll copy and try
                    * again.
                    *
                    * Note that if we're only allowed 1 Tx segment, we
                    * have an alignment restriction.  Do this test before
                    * attempting to load the DMA map, because it's more
                    * likely we'll trip the alignment test than the
                    * more-than-one-segment test.
                    */
                   if ((sc->sc_ntxsegs == 1 && (mtod(m0, uintptr_t) & 3) != 0) ||
                       bus_dmamap_load_mbuf(sc->sc_dmat, dmamap, m0,
                         BUS_DMA_WRITE|BUS_DMA_NOWAIT) != 0) {
                           MGETHDR(m, M_DONTWAIT, MT_DATA);
                           if (m == NULL) {
                                   printf("%s: unable to allocate Tx mbuf\n",
                                       sc->sc_dev.dv_xname);
                                   break;
                           }
                           MCLAIM(m, &sc->sc_ethercom.ec_tx_mowner);
                           if (m0->m_pkthdr.len > MHLEN) {
                                   MCLGET(m, M_DONTWAIT);
                                   if ((m->m_flags & M_EXT) == 0) {
                                           printf("%s: unable to allocate Tx "
                                               "cluster\n", sc->sc_dev.dv_xname);
                                           m_freem(m);
                                           break;
                                   }
                           }
                           m_copydata(m0, 0, m0->m_pkthdr.len, mtod(m, caddr_t));
                           m->m_pkthdr.len = m->m_len = m0->m_pkthdr.len;
                           error = bus_dmamap_load_mbuf(sc->sc_dmat, dmamap,
                               m, BUS_DMA_WRITE|BUS_DMA_NOWAIT);
                           if (error) {
                                   printf("%s: unable to load Tx buffer, "
                                       "error = %d\n", sc->sc_dev.dv_xname, error);
                                   break;
                           }
                   }
   
                   /*
                    * Ensure we have enough descriptors free to describe
                    * the packet.
                    */
                   if (dmamap->dm_nsegs > sc->sc_txfree) {
                           /*
                            * Not enough free descriptors to transmit this
                            * packet.  We haven't committed to anything yet,
                            * so just unload the DMA map, put the packet
                            * back on the queue, and punt.  Notify the upper
                            * layer that there are no more slots left.
                            *
                            * XXX We could allocate an mbuf and copy, but
                            * XXX it is worth it?
                            */
                           ifp->if_flags |= IFF_OACTIVE;
                           bus_dmamap_unload(sc->sc_dmat, dmamap);
                           if (m != NULL)
                                   m_freem(m);
                           break;
                   }
   
                   IFQ_DEQUEUE(&ifp->if_snd, m0);
                   if (m != NULL) {
                           m_freem(m0);
                           m0 = m;
                   }
   
                   /*
                    * WE ARE NOW COMMITTED TO TRANSMITTING THE PACKET.
                    */
   
                   /* Sync the DMA map. */
                   bus_dmamap_sync(sc->sc_dmat, dmamap, 0, dmamap->dm_mapsize,
                       BUS_DMASYNC_PREWRITE);
   
                   /*
                    * Initialize the transmit descriptors.
                    */
                   for (nexttx = sc->sc_txnext, seg = 0;
                        seg < dmamap->dm_nsegs;
                        seg++, nexttx = TULIP_NEXTTX(nexttx)) {
                           /*
                            * If this is the first descriptor we're
                            * enqueueing, don't set the OWN bit just
                            * yet.  That could cause a race condition.
                            * We'll do it below.
                            */
                           sc->sc_txdescs[nexttx].td_status =
                               (nexttx == firsttx) ? 0 : htole32(TDSTAT_OWN);
                           sc->sc_txdescs[nexttx].td_bufaddr1 =
                               htole32(dmamap->dm_segs[seg].ds_addr);
                           sc->sc_txdescs[nexttx].td_ctl =
                               htole32((dmamap->dm_segs[seg].ds_len <<
                                   TDCTL_SIZE1_SHIFT) | sc->sc_tdctl_ch |
                                   (nexttx == (TULIP_NTXDESC - 1) ?
                                    sc->sc_tdctl_er : 0));
                           lasttx = nexttx;
                   }
   
                   KASSERT(lasttx != -1);
   
                   /* Set `first segment' and `last segment' appropriately. */
                   sc->sc_txdescs[sc->sc_txnext].td_ctl |= htole32(TDCTL_Tx_FS);
                   sc->sc_txdescs[lasttx].td_ctl |= htole32(TDCTL_Tx_LS);
   
   #ifdef TLP_DEBUG
                   if (ifp->if_flags & IFF_DEBUG) {
                           printf("     txsoft %p transmit chain:\n", txs);
                           for (seg = sc->sc_txnext;; seg = TULIP_NEXTTX(seg)) {
                                   printf("     descriptor %d:\n", seg);
                                   printf("       td_status:   0x%08x\n",
                                       le32toh(sc->sc_txdescs[seg].td_status));
                                   printf("       td_ctl:      0x%08x\n",
                                       le32toh(sc->sc_txdescs[seg].td_ctl));
                                   printf("       td_bufaddr1: 0x%08x\n",
                                       le32toh(sc->sc_txdescs[seg].td_bufaddr1));
                                   printf("       td_bufaddr2: 0x%08x\n",
                                       le32toh(sc->sc_txdescs[seg].td_bufaddr2));
                                   if (seg == lasttx)
                                           break;
                           }
                   }
   #endif
   
                   /* Sync the descriptors we're using. */
                   TULIP_CDTXSYNC(sc, sc->sc_txnext, dmamap->dm_nsegs,
                       BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE);
   
                   /*
                    * Store a pointer to the packet so we can free it later,
                    * and remember what txdirty will be once the packet is
                    * done.
                    */
                   txs->txs_mbuf = m0;
                   txs->txs_firstdesc = sc->sc_txnext;
                   txs->txs_lastdesc = lasttx;
                   txs->txs_ndescs = dmamap->dm_nsegs;
   
                   /* Advance the tx pointer. */
                   sc->sc_txfree -= dmamap->dm_nsegs;
                   sc->sc_txnext = nexttx;
   
                   SIMPLEQ_REMOVE_HEAD(&sc->sc_txfreeq, txs_q);
                   SIMPLEQ_INSERT_TAIL(&sc->sc_txdirtyq, txs, txs_q);
   
                   last_txs = txs;
   
   #if NBPFILTER > 0
                   /*
                    * Pass the packet to any BPF listeners.
                    */
                   if (ifp->if_bpf)
                           bpf_mtap(ifp->if_bpf, m0);
   #endif /* NBPFILTER > 0 */
           }
   
           if (txs == NULL || sc->sc_txfree == 0) {
                   /* No more slots left; notify upper layer. */
                   ifp->if_flags |= IFF_OACTIVE;
           }
   
           if (sc->sc_txfree != ofree) {
                   DPRINTF(sc, ("%s: packets enqueued, IC on %d, OWN on %d\n",
                       sc->sc_dev.dv_xname, lasttx, firsttx));
                   /*
                    * Cause a transmit interrupt to happen on the
                    * last packet we enqueued.
                    */
                   sc->sc_txdescs[lasttx].td_ctl |= htole32(TDCTL_Tx_IC);
                   TULIP_CDTXSYNC(sc, lasttx, 1,
                       BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE);
   
                   /*
                    * Some clone chips want IC on the *first* segment in
                    * the packet.  Appease them.
                    */
                   KASSERT(last_txs != NULL);
                   if ((sc->sc_flags & TULIPF_IC_FS) != 0 &&
                       last_txs->txs_firstdesc != lasttx) {
                           sc->sc_txdescs[last_txs->txs_firstdesc].td_ctl |=
                               htole32(TDCTL_Tx_IC);
                           TULIP_CDTXSYNC(sc, last_txs->txs_firstdesc, 1,
                               BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE);
                   }
   
                   /*
                    * The entire packet chain is set up.  Give the
                    * first descriptor to the chip now.
                    */
                   sc->sc_txdescs[firsttx].td_status |= htole32(TDSTAT_OWN);
                   TULIP_CDTXSYNC(sc, firsttx, 1,
                       BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE);
   
                   /* Wake up the transmitter. */
                   /* XXX USE AUTOPOLLING? */
                   TULIP_WRITE(sc, CSR_TXPOLL, TXPOLL_TPD);
   
                   /* Set a watchdog timer in case the chip flakes out. */
                   ifp->if_timer = 5;
           }
   }
   
   /*
    * tlp_watchdog:        [ifnet interface function]
    *
    *      Watchdog timer handler.
    */
   void
   tlp_watchdog(ifp)
           struct ifnet *ifp;
   {
           struct tulip_softc *sc = ifp->if_softc;
           int doing_setup, doing_transmit;
   
           doing_setup = (sc->sc_flags & TULIPF_DOING_SETUP);
           doing_transmit = (! SIMPLEQ_EMPTY(&sc->sc_txdirtyq));
   
           if (doing_setup && doing_transmit) {
                   printf("%s: filter setup and transmit timeout\n",
                       sc->sc_dev.dv_xname);
                   ifp->if_oerrors++;
           } else if (doing_transmit) {
                   printf("%s: transmit timeout\n", sc->sc_dev.dv_xname);
                   ifp->if_oerrors++;
           } else if (doing_setup)
                   printf("%s: filter setup timeout\n", sc->sc_dev.dv_xname);
           else
                   printf("%s: spurious watchdog timeout\n", sc->sc_dev.dv_xname);
   
           (void) tlp_init(ifp);
   
           /* Try to get more packets going. */
           tlp_start(ifp);
   }
   
   /*
    * tlp_ioctl:           [ifnet interface function]
    *
    *      Handle control requests from the operator.
    */
   int
   tlp_ioctl(ifp, cmd, data)
           struct ifnet *ifp;
           u_long cmd;
           caddr_t data;
   {
           struct tulip_softc *sc = ifp->if_softc;
           struct ifreq *ifr = (struct ifreq *)data;
           int s, error;
   
           s = splnet();
   
           switch (cmd) {
          case SIOCSIFMEDIA:
          case SIOCGIFMEDIA:
                  error = ifmedia_ioctl(ifp, ifr, &sc->sc_mii.mii_media, cmd);
                  break;
  
          default:
                  error = ether_ioctl(ifp, cmd, data);
                  if (error == ENETRESET) {
                          if (TULIP_IS_ENABLED(sc)) {
                                  /*
                                   * Multicast list has changed.  Set the
                                   * hardware filter accordingly.
                                   */
                                  (*sc->sc_filter_setup)(sc);
                          }
                          error = 0;
                  }
                  break;
          }
  
          /* Try to get more packets going. */
          if (TULIP_IS_ENABLED(sc))
                  tlp_start(ifp);
  
          splx(s);
          return (error);
  }
  
  /*
   * tlp_intr:
   *
   *      Interrupt service routine.
   */
  int
  tlp_intr(arg)
          void *arg;
  {
          struct tulip_softc *sc = arg;
          struct ifnet *ifp = &sc->sc_ethercom.ec_if;
          u_int32_t status, rxstatus, txstatus;
          int handled = 0, txthresh;
  
          DPRINTF(sc, ("%s: tlp_intr\n", sc->sc_dev.dv_xname));
  
  #ifdef DEBUG
          if (TULIP_IS_ENABLED(sc) == 0)
                  panic("%s: tlp_intr: not enabled", sc->sc_dev.dv_xname);
  #endif
  
          /*
           * If the interface isn't running, the interrupt couldn't
           * possibly have come from us.
           */
          if ((ifp->if_flags & IFF_RUNNING) == 0 ||
              (sc->sc_dev.dv_flags & DVF_ACTIVE) == 0)
                  return (0);
  
          /* Disable interrupts on the DM9102 (interrupt edge bug). */
          switch (sc->sc_chip) {
          case TULIP_CHIP_DM9102:
          case TULIP_CHIP_DM9102A:
                  TULIP_WRITE(sc, CSR_INTEN, 0);
                  break;
  
          default:
                  /* Nothing. */
                  break;
          }
  
          for (;;) {
                  status = TULIP_READ(sc, CSR_STATUS);
                  if (status)
                          TULIP_WRITE(sc, CSR_STATUS, status);
  
                  if ((status & sc->sc_inten) == 0)
                          break;
  
                  handled = 1;
  
                  rxstatus = status & sc->sc_rxint_mask;
                  txstatus = status & sc->sc_txint_mask;
  
                  if (rxstatus) {
                          /* Grab new any new packets. */
                          tlp_rxintr(sc);
  
                          if (rxstatus & STATUS_RWT)
                                  printf("%s: receive watchdog timeout\n",
                                      sc->sc_dev.dv_xname);
  
                          if (rxstatus & STATUS_RU) {
                                  printf("%s: receive ring overrun\n",
                                      sc->sc_dev.dv_xname);
                                  /* Get the receive process going again. */
                                  if (sc->sc_tdctl_er != TDCTL_ER) {
                                          tlp_idle(sc, OPMODE_SR);
                                          TULIP_WRITE(sc, CSR_RXLIST,
                                              TULIP_CDRXADDR(sc, sc->sc_rxptr));
                                          TULIP_WRITE(sc, CSR_OPMODE,
                                              sc->sc_opmode);
                                  }
                                  TULIP_WRITE(sc, CSR_RXPOLL, RXPOLL_RPD);
                                  break;
                          }
                  }
  
                  if (txstatus) {
                          /* Sweep up transmit descriptors. */
                          tlp_txintr(sc);
  
                          if (txstatus & STATUS_TJT)
                                  printf("%s: transmit jabber timeout\n",
                                      sc->sc_dev.dv_xname);
  
                          if (txstatus & STATUS_UNF) {
                                  /*
                                   * Increase our transmit threshold if
                                   * another is available.
                                   */
                                  txthresh = sc->sc_txthresh + 1;
                                  if (sc->sc_txth[txthresh].txth_name != NULL) {
                                          /* Idle the transmit process. */
                                          tlp_idle(sc, OPMODE_ST);
  
                                          sc->sc_txthresh = txthresh;
                                          sc->sc_opmode &= ~(OPMODE_TR|OPMODE_SF);
                                          sc->sc_opmode |=
                                              sc->sc_txth[txthresh].txth_opmode;
                                          printf("%s: transmit underrun; new "
                                              "threshold: %s\n",
                                              sc->sc_dev.dv_xname,
                                              sc->sc_txth[txthresh].txth_name);
  
                                          /*
                                           * Set the new threshold and restart
                                           * the transmit process.
                                           */
                                          TULIP_WRITE(sc, CSR_OPMODE,
                                              sc->sc_opmode);
                                  }
                                          /*
                                           * XXX Log every Nth underrun from
                                           * XXX now on?
                                           */
                          }
                  }
  
                  if (status & (STATUS_TPS|STATUS_RPS)) {
                          if (status & STATUS_TPS)
                                  printf("%s: transmit process stopped\n",
                                      sc->sc_dev.dv_xname);
                          if (status & STATUS_RPS)
                                  printf("%s: receive process stopped\n",
                                      sc->sc_dev.dv_xname);
                          (void) tlp_init(ifp);
                          break;
                  }
  
                  if (status & STATUS_SE) {
                          const char *str;
                          switch (status & STATUS_EB) {
                          case STATUS_EB_PARITY:
                                  str = "parity error";
                                  break;
  
                          case STATUS_EB_MABT:
                                  str = "master abort";
                                  break;
  
                          case STATUS_EB_TABT:
                                  str = "target abort";
                                  break;
  
                          default:
                                  str = "unknown error";
                                  break;
                          }
                          printf("%s: fatal system error: %s\n",
                              sc->sc_dev.dv_xname, str);
                          (void) tlp_init(ifp);
                          break;
                  }
  
                  /*
                   * Not handled:
                   *
                   *      Transmit buffer unavailable -- normal
                   *      condition, nothing to do, really.
                   *
                   *      General purpose timer experied -- we don't
                   *      use the general purpose timer.
                   *
                   *      Early receive interrupt -- not available on
                   *      all chips, we just use RI.  We also only
                   *      use single-segment receive DMA, so this
                   *      is mostly useless.
                   */
          }
  
          /* Bring interrupts back up on the DM9102. */
          switch (sc->sc_chip) {
          case TULIP_CHIP_DM9102:
          case TULIP_CHIP_DM9102A:
                  TULIP_WRITE(sc, CSR_INTEN, sc->sc_inten);
                  break;
  
          default:
                  /* Nothing. */
                  break;
          }
  
          /* Try to get more packets going. */
          tlp_start(ifp);
  
  #if NRND > 0
          if (handled)
                  rnd_add_uint32(&sc->sc_rnd_source, status);
  #endif
          return (handled);
  }
  
  /*
   * tlp_rxintr:
   *
   *      Helper; handle receive interrupts.
   */
  void
  tlp_rxintr(sc)
          struct tulip_softc *sc;
  {
          struct ifnet *ifp = &sc->sc_ethercom.ec_if;
          struct ether_header *eh;
          struct tulip_rxsoft *rxs;
          struct mbuf *m;
          u_int32_t rxstat;
          int i, len;
  
          for (i = sc->sc_rxptr;; i = TULIP_NEXTRX(i)) {
                  rxs = &sc->sc_rxsoft[i];
  
                  TULIP_CDRXSYNC(sc, i,
                      BUS_DMASYNC_POSTREAD|BUS_DMASYNC_POSTWRITE);
  
                  rxstat = le32toh(sc->sc_rxdescs[i].td_status);
  
                  if (rxstat & TDSTAT_OWN) {
                          /*
                           * We have processed all of the receive buffers.
                           */
                          break;
                  }
  
                  /*
                   * Make sure the packet fit in one buffer.  This should
                   * always be the case.  But the Lite-On PNIC, rev 33
                   * has an awful receive engine bug, which may require
                   * a very icky work-around.
                   */
                  if ((rxstat & (TDSTAT_Rx_FS|TDSTAT_Rx_LS)) !=
                      (TDSTAT_Rx_FS|TDSTAT_Rx_LS)) {
                          printf("%s: incoming packet spilled, resetting\n",
                              sc->sc_dev.dv_xname);
                          (void) tlp_init(ifp);
                          return;
                  }
  
                  /*
                   * If any collisions were seen on the wire, count one.
                   */
                  if (rxstat & TDSTAT_Rx_CS)
                          ifp->if_collisions++;
  
                  /*
                   * If an error occurred, update stats, clear the status
                   * word, and leave the packet buffer in place.  It will
                   * simply be reused the next time the ring comes around.
                   * If 802.1Q VLAN MTU is enabled, ignore the Frame Too Long
                   * error.
                   */
                  if (rxstat & TDSTAT_ES &&
                      ((sc->sc_ethercom.ec_capenable & ETHERCAP_VLAN_MTU) == 0 ||
                       (rxstat & (TDSTAT_Rx_DE | TDSTAT_Rx_RF |
                                  TDSTAT_Rx_DB | TDSTAT_Rx_CE)) != 0)) {
  #define PRINTERR(bit, str)                                              \
                          if (rxstat & (bit))                             \
                                  printf("%s: receive error: %s\n",       \
                                      sc->sc_dev.dv_xname, str)
                          ifp->if_ierrors++;
                          PRINTERR(TDSTAT_Rx_DE, "descriptor error");
                          PRINTERR(TDSTAT_Rx_RF, "runt frame");
                          PRINTERR(TDSTAT_Rx_TL, "frame too long");
                          PRINTERR(TDSTAT_Rx_RE, "MII error");
                          PRINTERR(TDSTAT_Rx_DB, "dribbling bit");
                          PRINTERR(TDSTAT_Rx_CE, "CRC error");
  #undef PRINTERR
                          TULIP_INIT_RXDESC(sc, i);
                          continue;
                  }
  
                  bus_dmamap_sync(sc->sc_dmat, rxs->rxs_dmamap, 0,
                      rxs->rxs_dmamap->dm_mapsize, BUS_DMASYNC_POSTREAD);
  
                  /*
                   * No errors; receive the packet.  Note the Tulip
                   * includes the CRC with every packet.
                   */
                  len = TDSTAT_Rx_LENGTH(rxstat);
  
  #ifdef __NO_STRICT_ALIGNMENT
                  /*
                   * Allocate a new mbuf cluster.  If that fails, we are
                   * out of memory, and must drop the packet and recycle
                   * the buffer that's already attached to this descriptor.
                   */
                  m = rxs->rxs_mbuf;
                  if (tlp_add_rxbuf(sc, i) != 0) {
                          ifp->if_ierrors++;
                          TULIP_INIT_RXDESC(sc, i);
                          bus_dmamap_sync(sc->sc_dmat, rxs->rxs_dmamap, 0,
                              rxs->rxs_dmamap->dm_mapsize, BUS_DMASYNC_PREREAD);
                          continue;
                  }
  #else
                  /*
                   * The Tulip's receive buffers must be 4-byte aligned.
                   * But this means that the data after the Ethernet header
                   * is misaligned.  We must allocate a new buffer and
                   * copy the data, shifted forward 2 bytes.
                   */
                  MGETHDR(m, M_DONTWAIT, MT_DATA);
                  if (m == NULL) {
   dropit:
                          ifp->if_ierrors++;
                          TULIP_INIT_RXDESC(sc, i);
                          bus_dmamap_sync(sc->sc_dmat, rxs->rxs_dmamap, 0,
                              rxs->rxs_dmamap->dm_mapsize, BUS_DMASYNC_PREREAD);
                          continue;
                  }
                  MCLAIM(m, &sc->sc_ethercom.ec_rx_mowner);
                  if (len > (MHLEN - 2)) {
                          MCLGET(m, M_DONTWAIT);
                          if ((m->m_flags & M_EXT) == 0) {
                                  m_freem(m);
                                  goto dropit;
                          }
                  }
                  m->m_data += 2;
  
                  /*
                   * Note that we use clusters for incoming frames, so the
                   * buffer is virtually contiguous.
                   */
                  memcpy(mtod(m, caddr_t), mtod(rxs->rxs_mbuf, caddr_t), len);
  
                  /* Allow the receive descriptor to continue using its mbuf. */
                  TULIP_INIT_RXDESC(sc, i);
                  bus_dmamap_sync(sc->sc_dmat, rxs->rxs_dmamap, 0,
                      rxs->rxs_dmamap->dm_mapsize, BUS_DMASYNC_PREREAD);
  #endif /* __NO_STRICT_ALIGNMENT */
  
                  ifp->if_ipackets++;
                  eh = mtod(m, struct ether_header *);
                  m->m_flags |= M_HASFCS;
                  m->m_pkthdr.rcvif = ifp;
                  m->m_pkthdr.len = m->m_len = len;
  
                  /*
                   * XXX Work-around for a weird problem with the emulated
                   * 21041 on Connectix Virtual PC:
                   *
                   * When we receive a full-size TCP segment, we seem to get
                   * a packet there the Rx status says 1522 bytes, yet we do
                   * not get a frame-too-long error from the chip.  The extra
                   * bytes seem to always be zeros.  Perhaps Virtual PC is
                   * inserting 4 bytes of zeros after every packet.  In any
                   * case, let's try and detect this condition and truncate
                   * the length so that it will pass up the stack.
                   */
                  if (__predict_false((sc->sc_flags & TULIPF_VPC) != 0)) {
                          uint16_t etype = ntohs(eh->ether_type);
  
                          if (len > ETHER_MAX_FRAME(ifp, etype,
                                                    M_HASFCS))
                                  m->m_pkthdr.len = m->m_len = len =
                                      ETHER_MAX_FRAME(ifp, etype, M_HASFCS);
                  }
  
  #if NBPFILTER > 0
                  /*
                   * Pass this up to any BPF listeners, but only
                   * pass it up the stack if its for us.
                   */
                  if (ifp->if_bpf)
                          bpf_mtap(ifp->if_bpf, m);
  #endif /* NPBFILTER > 0 */
  
                  /*
                   * We sometimes have to run the 21140 in Hash-Only
                   * mode.  If we're in that mode, and not in promiscuous
                   * mode, and we have a unicast packet that isn't for
                   * us, then drop it.
                   */
                  if (sc->sc_filtmode == TDCTL_Tx_FT_HASHONLY &&
                      (ifp->if_flags & IFF_PROMISC) == 0 &&
                      ETHER_IS_MULTICAST(eh->ether_dhost) == 0 &&
                      memcmp(LLADDR(ifp->if_sadl), eh->ether_dhost,
                             ETHER_ADDR_LEN) != 0) {
                          m_freem(m);
                          continue;
                  }
  
                  /* Pass it on. */
                  (*ifp->if_input)(ifp, m);
          }
  
          /* Update the receive pointer. */
          sc->sc_rxptr = i;
  }
  
  /*
   * tlp_txintr:
   *
   *      Helper; handle transmit interrupts.
   */
  void
  tlp_txintr(sc)
          struct tulip_softc *sc;
  {
          struct ifnet *ifp = &sc->sc_ethercom.ec_if;
          struct tulip_txsoft *txs;
          u_int32_t txstat;
  
          DPRINTF(sc, ("%s: tlp_txintr: sc_flags 0x%08x\n",
              sc->sc_dev.dv_xname, sc->sc_flags));
  
          ifp->if_flags &= ~IFF_OACTIVE;
  
          /*
           * Go through our Tx list and free mbufs for those
           * frames that have been transmitted.
           */
          while ((txs = SIMPLEQ_FIRST(&sc->sc_txdirtyq)) != NULL) {
                  TULIP_CDTXSYNC(sc, txs->txs_lastdesc,
                      txs->txs_ndescs,
                      BUS_DMASYNC_POSTREAD|BUS_DMASYNC_POSTWRITE);
  
  #ifdef TLP_DEBUG
                  if (ifp->if_flags & IFF_DEBUG) {
                          int i;
                          printf("    txsoft %p transmit chain:\n", txs);
                          for (i = txs->txs_firstdesc;; i = TULIP_NEXTTX(i)) {
                                  printf("     descriptor %d:\n", i);
                                  printf("       td_status:   0x%08x\n",
                                      le32toh(sc->sc_txdescs[i].td_status));
                                  printf("       td_ctl:      0x%08x\n",
                                      le32toh(sc->sc_txdescs[i].td_ctl));
                                  printf("       td_bufaddr1: 0x%08x\n",
                                      le32toh(sc->sc_txdescs[i].td_bufaddr1));
                                  printf("       td_bufaddr2: 0x%08x\n",
                                      le32toh(sc->sc_txdescs[i].td_bufaddr2));
                                  if (i == txs->txs_lastdesc)
                                          break;
                          }
                  }
  #endif
  
                  txstat = le32toh(sc->sc_txdescs[txs->txs_lastdesc].td_status);
                  if (txstat & TDSTAT_OWN)
                          break;
  
                  SIMPLEQ_REMOVE_HEAD(&sc->sc_txdirtyq, txs_q);
  
                  sc->sc_txfree += txs->txs_ndescs;
  
                  if (txs->txs_mbuf == NULL) {
                          /*
                           * If we didn't have an mbuf, it was the setup
                           * packet.
                           */
  #ifdef DIAGNOSTIC
                          if ((sc->sc_flags & TULIPF_DOING_SETUP) == 0)
                                  panic("tlp_txintr: null mbuf, not doing setup");
  #endif
                          TULIP_CDSPSYNC(sc, BUS_DMASYNC_POSTWRITE);
                          sc->sc_flags &= ~TULIPF_DOING_SETUP;
                          SIMPLEQ_INSERT_TAIL(&sc->sc_txfreeq, txs, txs_q);
                          continue;
                  }
  
                  bus_dmamap_sync(sc->sc_dmat, txs->txs_dmamap,
                      0, txs->txs_dmamap->dm_mapsize,
                      BUS_DMASYNC_POSTWRITE);
                  bus_dmamap_unload(sc->sc_dmat, txs->txs_dmamap);
                  m_freem(txs->txs_mbuf);
                  txs->txs_mbuf = NULL;
  
                  SIMPLEQ_INSERT_TAIL(&sc->sc_txfreeq, txs, txs_q);
  
                  /*
                   * Check for errors and collisions.
                   */
  #ifdef TLP_STATS
                  if (txstat & TDSTAT_Tx_UF)
                          sc->sc_stats.ts_tx_uf++;
                  if (txstat & TDSTAT_Tx_TO)
                          sc->sc_stats.ts_tx_to++;
                  if (txstat & TDSTAT_Tx_EC)
                          sc->sc_stats.ts_tx_ec++;
                  if (txstat & TDSTAT_Tx_LC)
                          sc->sc_stats.ts_tx_lc++;
  #endif
  
                  if (txstat & (TDSTAT_Tx_UF|TDSTAT_Tx_TO))
                          ifp->if_oerrors++;
                  
                  if (txstat & TDSTAT_Tx_EC)
                          ifp->if_collisions += 16;
                  else
                          ifp->if_collisions += TDSTAT_Tx_COLLISIONS(txstat);
                  if (txstat & TDSTAT_Tx_LC)
                          ifp->if_collisions++;
  
                  ifp->if_opackets++;
          }
  
          /*
           * If there are no more pending transmissions, cancel the watchdog
           * timer.
           */
          if (txs == NULL && (sc->sc_flags & TULIPF_DOING_SETUP) == 0)
                  ifp->if_timer = 0;
  
          /*
           * If we have a receive filter setup pending, do it now.
           */
          if (sc->sc_flags & TULIPF_WANT_SETUP)
                  (*sc->sc_filter_setup)(sc);
  }
  
  #ifdef TLP_STATS
  void
  tlp_print_stats(sc)
          struct tulip_softc *sc;
  {
  
          printf("%s: tx_uf %lu, tx_to %lu, tx_ec %lu, tx_lc %lu\n",
              sc->sc_dev.dv_xname,
              sc->sc_stats.ts_tx_uf, sc->sc_stats.ts_tx_to,
              sc->sc_stats.ts_tx_ec, sc->sc_stats.ts_tx_lc);
  }
  #endif
  
  /*
   * tlp_reset:
   *
   *      Perform a soft reset on the Tulip.
   */
  void
  tlp_reset(sc)
          struct tulip_softc *sc;
  {
          int i;
  
          TULIP_WRITE(sc, CSR_BUSMODE, BUSMODE_SWR);
  
          /*
           * Xircom clone doesn't bring itself out of reset automatically.
           * Instead, we have to wait at least 50 PCI cycles, and then
           * clear SWR.
           */
          if (sc->sc_chip == TULIP_CHIP_X3201_3) {
                  delay(10);
                  TULIP_WRITE(sc, CSR_BUSMODE, 0);
          }
  
          for (i = 0; i < 1000; i++) {
                  /*
                   * Wait at least 50 PCI cycles for the reset to
                   * complete before peeking at the Tulip again.
                   * 10 uSec is a bit longer than 50 PCI cycles
                   * (at 33MHz), but it doesn't hurt have the extra
                   * wait.
                   */
                  delay(10);
                  if (TULIP_ISSET(sc, CSR_BUSMODE, BUSMODE_SWR) == 0)
                          break;
          }
  
          if (TULIP_ISSET(sc, CSR_BUSMODE, BUSMODE_SWR))
                  printf("%s: reset failed to complete\n", sc->sc_dev.dv_xname);
  
          delay(1000);
  
          /*
           * If the board has any GPIO reset sequences to issue, do them now.
           */
          if (sc->sc_reset != NULL)
                  (*sc->sc_reset)(sc);
  }
  
  /*
   * tlp_init:            [ ifnet interface function ]
   *
   *      Initialize the interface.  Must be called at splnet().
   */
  int
  tlp_init(ifp)
          struct ifnet *ifp;
  {
          struct tulip_softc *sc = ifp->if_softc;
          struct tulip_txsoft *txs;
          struct tulip_rxsoft *rxs;
          int i, error = 0;
  
          if ((error = tlp_enable(sc)) != 0)
                  goto out;
  
          /*
           * Cancel any pending I/O.
           */
          tlp_stop(ifp, 0);
  
          /*
           * Initialize `opmode' to 0, and call the pre-init routine, if
           * any.  This is required because the 2114x and some of the
           * clones require that the media-related bits in `opmode' be
           * set before performing a soft-reset in order to get internal
           * chip pathways are correct.  Yay!
           */
          sc->sc_opmode = 0;
          if (sc->sc_preinit != NULL)
                  (*sc->sc_preinit)(sc);
  
          /*
           * Reset the Tulip to a known state.
           */
          tlp_reset(sc);
  
          /*
           * Initialize the BUSMODE register.
           */
          sc->sc_busmode = BUSMODE_BAR;
          switch (sc->sc_chip) {
          case TULIP_CHIP_21140:
          case TULIP_CHIP_21140A:
          case TULIP_CHIP_21142:
          case TULIP_CHIP_21143:
          case TULIP_CHIP_82C115:
          case TULIP_CHIP_MX98725:
                  /*
                   * If we're allowed to do so, use Memory Read Line
                   * and Memory Read Multiple.
                   *
                   * XXX Should we use Memory Write and Invalidate?
                   */
                  if (sc->sc_flags & TULIPF_MRL)
                          sc->sc_busmode |= BUSMODE_RLE;
                  if (sc->sc_flags & TULIPF_MRM)
                          sc->sc_busmode |= BUSMODE_RME;
  #if 0
                  if (sc->sc_flags & TULIPF_MWI)
                          sc->sc_busmode |= BUSMODE_WLE;
  #endif
                  break;
  
          case TULIP_CHIP_82C168:
          case TULIP_CHIP_82C169:
                  sc->sc_busmode |= BUSMODE_PNIC_MBO;
                  if (sc->sc_maxburst == 0)
                          sc->sc_maxburst = 16;
                  break;
  
          default:
                  /* Nothing. */
                  break;
          }
          switch (sc->sc_cacheline) {
          default:
                  /*
                   * Note: We must *always* set these bits; a cache
                   * alignment of 0 is RESERVED.
                   */
          case 8:
                  sc->sc_busmode |= BUSMODE_CAL_8LW;
                  break;
          case 16:
                  sc->sc_busmode |= BUSMODE_CAL_16LW;
                  break;
          case 32:
                  sc->sc_busmode |= BUSMODE_CAL_32LW;
                  break;
          }
          switch (sc->sc_maxburst) {
          case 1:
                  sc->sc_busmode |= BUSMODE_PBL_1LW;
                  break;
          case 2:
                  sc->sc_busmode |= BUSMODE_PBL_2LW;
                  break;
          case 4:
                  sc->sc_busmode |= BUSMODE_PBL_4LW;
                  break;
          case 8:
                  sc->sc_busmode |= BUSMODE_PBL_8LW;
                  break;
          case 16:
                  sc->sc_busmode |= BUSMODE_PBL_16LW;
                  break;
          case 32:
                  sc->sc_busmode |= BUSMODE_PBL_32LW;
                  break;
          default:
                  sc->sc_busmode |= BUSMODE_PBL_DEFAULT;
                  break;
          }
  #if BYTE_ORDER == BIG_ENDIAN
          /*
           * Can't use BUSMODE_BLE or BUSMODE_DBO; not all chips
           * support them, and even on ones that do, it doesn't
           * always work.  So we always access descriptors with
           * little endian via htole32/le32toh.
           */
  #endif
          /*
           * Big-endian bus requires BUSMODE_BLE anyway.
           * Also, BUSMODE_DBO is needed because we assume
           * descriptors are little endian.
           */
          if (sc->sc_flags & TULIPF_BLE)
                  sc->sc_busmode |= BUSMODE_BLE;
          if (sc->sc_flags & TULIPF_DBO)
                  sc->sc_busmode |= BUSMODE_DBO;
  
          /*
           * Some chips have a broken bus interface.
           */
          switch (sc->sc_chip) {
          case TULIP_CHIP_DM9102:
          case TULIP_CHIP_DM9102A:
                  sc->sc_busmode = 0;
                  break;
  
          default:
                  /* Nothing. */
                  break;
          }
  
          TULIP_WRITE(sc, CSR_BUSMODE, sc->sc_busmode);
  
          /*
           * Initialize the OPMODE register.  We don't write it until
           * we're ready to begin the transmit and receive processes.
           *
           * Media-related OPMODE bits are set in the media callbacks
           * for each specific chip/board.
           */
          sc->sc_opmode |= OPMODE_SR | OPMODE_ST |
              sc->sc_txth[sc->sc_txthresh].txth_opmode;
  
          /*
           * Magical mystery initialization on the Macronix chips.
           * The MX98713 uses its own magic value, the rest share
           * a common one.
           */
          switch (sc->sc_chip) {
          case TULIP_CHIP_MX98713:
                  TULIP_WRITE(sc, CSR_PMAC_TOR, PMAC_TOR_98713);
                  break;
  
          case TULIP_CHIP_MX98713A:
          case TULIP_CHIP_MX98715:
          case TULIP_CHIP_MX98715A:
          case TULIP_CHIP_MX98715AEC_X:
          case TULIP_CHIP_MX98725:
                  TULIP_WRITE(sc, CSR_PMAC_TOR, PMAC_TOR_98715);
                  break;
  
          default:
                  /* Nothing. */
                  break;
          }
  
          /*
           * Initialize the transmit descriptor ring.
           */
          memset(sc->sc_txdescs, 0, sizeof(sc->sc_txdescs));
          for (i = 0; i < TULIP_NTXDESC; i++) {
                  sc->sc_txdescs[i].td_ctl = htole32(sc->sc_tdctl_ch);
                  sc->sc_txdescs[i].td_bufaddr2 =
                      htole32(TULIP_CDTXADDR(sc, TULIP_NEXTTX(i)));
          }
          sc->sc_txdescs[TULIP_NTXDESC - 1].td_ctl |= htole32(sc->sc_tdctl_er);
          TULIP_CDTXSYNC(sc, 0, TULIP_NTXDESC,
              BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE);
          sc->sc_txfree = TULIP_NTXDESC;
          sc->sc_txnext = 0;
  
          /*
           * Initialize the transmit job descriptors.
           */
          SIMPLEQ_INIT(&sc->sc_txfreeq);
          SIMPLEQ_INIT(&sc->sc_txdirtyq);
          for (i = 0; i < TULIP_TXQUEUELEN; i++) {
                  txs = &sc->sc_txsoft[i];
                  txs->txs_mbuf = NULL;
                  SIMPLEQ_INSERT_TAIL(&sc->sc_txfreeq, txs, txs_q);
          }
  
          /*
           * Initialize the receive descriptor and receive job
           * descriptor rings.
           */
          for (i = 0; i < TULIP_NRXDESC; i++) {
                  rxs = &sc->sc_rxsoft[i];
                  if (rxs->rxs_mbuf == NULL) {
                          if ((error = tlp_add_rxbuf(sc, i)) != 0) {
                                  printf("%s: unable to allocate or map rx "
                                      "buffer %d, error = %d\n",
                                      sc->sc_dev.dv_xname, i, error);
                                  /*
                                   * XXX Should attempt to run with fewer receive
                                   * XXX buffers instead of just failing.
                                   */
                                  tlp_rxdrain(sc);
                                  goto out;
                          }
                  } else
                          TULIP_INIT_RXDESC(sc, i);
          }
          sc->sc_rxptr = 0;
  
          /*
           * Initialize the interrupt mask and enable interrupts.
           */
          /* normal interrupts */
          sc->sc_inten =  STATUS_TI | STATUS_TU | STATUS_RI | STATUS_NIS;
  
          /* abnormal interrupts */
          sc->sc_inten |= STATUS_TPS | STATUS_TJT | STATUS_UNF |
              STATUS_RU | STATUS_RPS | STATUS_RWT | STATUS_SE | STATUS_AIS;
  
          sc->sc_rxint_mask = STATUS_RI|STATUS_RU|STATUS_RWT;
          sc->sc_txint_mask = STATUS_TI|STATUS_UNF|STATUS_TJT;
  
          switch (sc->sc_chip) {
          case TULIP_CHIP_WB89C840F:
                  /*
                   * Clear bits that we don't want that happen to
                   * overlap or don't exist.
                   */
                  sc->sc_inten &= ~(STATUS_WINB_REI|STATUS_RWT);
                  break;
  
          default:
                  /* Nothing. */
                  break;
          }
  
          sc->sc_rxint_mask &= sc->sc_inten;
          sc->sc_txint_mask &= sc->sc_inten;
  
          TULIP_WRITE(sc, CSR_INTEN, sc->sc_inten);
          TULIP_WRITE(sc, CSR_STATUS, 0xffffffff);
  
          /*
           * Give the transmit and receive rings to the Tulip.
           */
          TULIP_WRITE(sc, CSR_TXLIST, TULIP_CDTXADDR(sc, sc->sc_txnext));
          TULIP_WRITE(sc, CSR_RXLIST, TULIP_CDRXADDR(sc, sc->sc_rxptr));
  
          /*
           * On chips that do this differently, set the station address.
           */
          switch (sc->sc_chip) {
          case TULIP_CHIP_WB89C840F:
              {
                  /* XXX Do this with stream writes? */
                  bus_addr_t cpa = TULIP_CSR_OFFSET(sc, CSR_WINB_CPA0);
  
                  for (i = 0; i < ETHER_ADDR_LEN; i++) {
                          bus_space_write_1(sc->sc_st, sc->sc_sh,
                              cpa + i, LLADDR(ifp->if_sadl)[i]);
                  }
                  break;
              }
  
          case TULIP_CHIP_AL981:
          case TULIP_CHIP_AN983:
          case TULIP_CHIP_AN985:
              {
                  u_int32_t reg;
                  u_int8_t *enaddr = LLADDR(ifp->if_sadl);
  
                  reg = enaddr[0] |
                        (enaddr[1] << 8) |
                        (enaddr[2] << 16) |
                        (enaddr[3] << 24);
                  bus_space_write_4(sc->sc_st, sc->sc_sh, CSR_ADM_PAR0, reg);
  
                  reg = enaddr[4] |
                        (enaddr[5] << 8);
                  bus_space_write_4(sc->sc_st, sc->sc_sh, CSR_ADM_PAR1, reg);
              }
  
          default:
                  /* Nothing. */
                  break;
          }
  
          /*
           * Set the receive filter.  This will start the transmit and
           * receive processes.
           */
          (*sc->sc_filter_setup)(sc);
  
          /*
           * Set the current media.
           */
          (void) (*sc->sc_mediasw->tmsw_set)(sc);
  
          /*
           * Start the receive process.
           */
          TULIP_WRITE(sc, CSR_RXPOLL, RXPOLL_RPD);
  
          if (sc->sc_tick != NULL) {
                  /* Start the one second clock. */
                  callout_reset(&sc->sc_tick_callout, hz >> 3, sc->sc_tick, sc);
          }
  
          /*
           * Note that the interface is now running.
           */
          ifp->if_flags |= IFF_RUNNING;
          ifp->if_flags &= ~IFF_OACTIVE;
  
   out:
          if (error) {
                  ifp->if_flags &= ~(IFF_RUNNING | IFF_OACTIVE);
                  ifp->if_timer = 0;
                  printf("%s: interface not running\n", sc->sc_dev.dv_xname);
          }
          return (error);
  }
  
  /*
   * tlp_enable:
   *
   *      Enable the Tulip chip.
   */
  int
  tlp_enable(sc)
          struct tulip_softc *sc;
  {
  
          if (TULIP_IS_ENABLED(sc) == 0 && sc->sc_enable != NULL) {
                  if ((*sc->sc_enable)(sc) != 0) {
                          printf("%s: device enable failed\n",
                              sc->sc_dev.dv_xname);
                          return (EIO);
                  }
                  sc->sc_flags |= TULIPF_ENABLED;
          }
          return (0);
  }
  
  /*
   * tlp_disable:
   *
   *      Disable the Tulip chip.
   */
  void
  tlp_disable(sc)
          struct tulip_softc *sc;
  {
  
          if (TULIP_IS_ENABLED(sc) && sc->sc_disable != NULL) {
                  (*sc->sc_disable)(sc);
                  sc->sc_flags &= ~TULIPF_ENABLED;
          }
  }
  
  /*
   * tlp_power:
   *
   *      Power management (suspend/resume) hook.
   */
  void
  tlp_power(why, arg)
          int why;
          void *arg;
  {
          struct tulip_softc *sc = arg;
          struct ifnet *ifp = &sc->sc_ethercom.ec_if;
          int s;
  
          s = splnet();
          switch (why) {
          case PWR_STANDBY:
                  /* do nothing! */
                  break;
          case PWR_SUSPEND:
                  tlp_stop(ifp, 0);
                  if (sc->sc_power != NULL)
                          (*sc->sc_power)(sc, why);
                  break;
          case PWR_RESUME:
                  if (ifp->if_flags & IFF_UP) {
                          if (sc->sc_power != NULL)
                                  (*sc->sc_power)(sc, why);
                          tlp_init(ifp);
                  }
                  break;
          case PWR_SOFTSUSPEND:
          case PWR_SOFTSTANDBY:
          case PWR_SOFTRESUME:
                  break;
          }
          splx(s);
  }
  
  /*
   * tlp_rxdrain:
   *
   *      Drain the receive queue.
   */
  void
  tlp_rxdrain(sc)
          struct tulip_softc *sc;
  {
          struct tulip_rxsoft *rxs;
          int i;
  
          for (i = 0; i < TULIP_NRXDESC; i++) {
                  rxs = &sc->sc_rxsoft[i];
                  if (rxs->rxs_mbuf != NULL) {
                          bus_dmamap_unload(sc->sc_dmat, rxs->rxs_dmamap);
                          m_freem(rxs->rxs_mbuf);
                          rxs->rxs_mbuf = NULL;
                  }
          }
  }
  
  /*
   * tlp_stop:            [ ifnet interface function ]
   *
   *      Stop transmission on the interface.
   */
  void
  tlp_stop(ifp, disable)
          struct ifnet *ifp;
          int disable;
  {
          struct tulip_softc *sc = ifp->if_softc;
          struct tulip_txsoft *txs;
  
          if (sc->sc_tick != NULL) {
                  /* Stop the one second clock. */
                  callout_stop(&sc->sc_tick_callout);
          }
  
          if (sc->sc_flags & TULIPF_HAS_MII) {
                  /* Down the MII. */
                  mii_down(&sc->sc_mii);
          }
  
          /* Disable interrupts. */
          TULIP_WRITE(sc, CSR_INTEN, 0);
  
          /* Stop the transmit and receive processes. */
          sc->sc_opmode = 0;
          TULIP_WRITE(sc, CSR_OPMODE, 0);
          TULIP_WRITE(sc, CSR_RXLIST, 0);
          TULIP_WRITE(sc, CSR_TXLIST, 0);
  
          /*
           * Release any queued transmit buffers.
           */
          while ((txs = SIMPLEQ_FIRST(&sc->sc_txdirtyq)) != NULL) {
                  SIMPLEQ_REMOVE_HEAD(&sc->sc_txdirtyq, txs_q);
                  if (txs->txs_mbuf != NULL) {
                          bus_dmamap_unload(sc->sc_dmat, txs->txs_dmamap);
                          m_freem(txs->txs_mbuf);
                          txs->txs_mbuf = NULL;
                  }
                  SIMPLEQ_INSERT_TAIL(&sc->sc_txfreeq, txs, txs_q);
          }
  
          if (disable) {
                  tlp_rxdrain(sc);
                  tlp_disable(sc);
          }
  
          sc->sc_flags &= ~(TULIPF_WANT_SETUP|TULIPF_DOING_SETUP);
  
          /*
           * Mark the interface down and cancel the watchdog timer.
           */
          ifp->if_flags &= ~(IFF_RUNNING | IFF_OACTIVE);
          ifp->if_timer = 0;
  
          /*
           * Reset the chip (needed on some flavors to actually disable it).
           */
          tlp_reset(sc);
  }
  
  #define SROM_EMIT(sc, x)                                                \
  do {                                                                    \
          TULIP_WRITE((sc), CSR_MIIROM, (x));                             \
          delay(2);                                                       \
  } while (0)
  
  /*
   * tlp_srom_idle:
   *
   *      Put the SROM in idle state.
   */
  void
  tlp_srom_idle(sc)
          struct tulip_softc *sc;
  {
          u_int32_t miirom;
          int i;
  
          miirom = MIIROM_SR;
          SROM_EMIT(sc, miirom);
  
          miirom |= MIIROM_RD;
          SROM_EMIT(sc, miirom);
  
          miirom |= MIIROM_SROMCS;
          SROM_EMIT(sc, miirom);
  
          SROM_EMIT(sc, miirom|MIIROM_SROMSK);
  
          /* Strobe the clock 32 times. */
          for (i = 0; i < 32; i++) {
                  SROM_EMIT(sc, miirom);
                  SROM_EMIT(sc, miirom|MIIROM_SROMSK);
          }
  
          SROM_EMIT(sc, miirom);
  
          miirom &= ~MIIROM_SROMCS;
          SROM_EMIT(sc, miirom);
  
          SROM_EMIT(sc, 0);
  }
  
  /*
   * tlp_srom_size:
   *
   *      Determine the number of address bits in the SROM.
   */
  int
  tlp_srom_size(sc)
          struct tulip_softc *sc;
  {
          u_int32_t miirom;
          int x;
  
          /* Select the SROM. */
          miirom = MIIROM_SR;
          SROM_EMIT(sc, miirom);
  
          miirom |= MIIROM_RD;
          SROM_EMIT(sc, miirom);
  
          /* Send CHIP SELECT for one clock tick. */
          miirom |= MIIROM_SROMCS;
          SROM_EMIT(sc, miirom);
  
          /* Shift in the READ opcode. */
          for (x = 3; x > 0; x--) {
                  if (TULIP_SROM_OPC_READ & (1 << (x - 1)))
                          miirom |= MIIROM_SROMDI;
                  else
                          miirom &= ~MIIROM_SROMDI;
                  SROM_EMIT(sc, miirom);
                  SROM_EMIT(sc, miirom|MIIROM_SROMSK);
                  SROM_EMIT(sc, miirom);
          }
  
          /* Shift in address and look for dummy 0 bit. */
          for (x = 1; x <= 12; x++) {
                  miirom &= ~MIIROM_SROMDI;
                  SROM_EMIT(sc, miirom);
                  SROM_EMIT(sc, miirom|MIIROM_SROMSK);
                  if (!TULIP_ISSET(sc, CSR_MIIROM, MIIROM_SROMDO))
                          break;
                  SROM_EMIT(sc, miirom);
          }
  
          /* Clear CHIP SELECT. */
          miirom &= ~MIIROM_SROMCS;
          SROM_EMIT(sc, miirom);
  
          /* Deselect the SROM. */
          SROM_EMIT(sc, 0);
  
          if (x < 4 || x > 12) {
                  printf("%s: broken MicroWire interface detected; "
                      "setting SROM size to 1Kb\n", sc->sc_dev.dv_xname);
                  return (6);
          } else {
                  if (tlp_srom_debug)
                          printf("%s: SROM size is 2^%d*16 bits (%d bytes)\n",
                              sc->sc_dev.dv_xname, x, (1 << (x + 4)) >> 3);
                  return (x);
          }
  }
  
  /*
   * tlp_read_srom:
   *
   *      Read the Tulip SROM.
   */
  int
  tlp_read_srom(sc)
          struct tulip_softc *sc;
  {
          int size;
          u_int32_t miirom;
          u_int16_t datain;
          int i, x;
  
          tlp_srom_idle(sc);
  
          sc->sc_srom_addrbits = tlp_srom_size(sc);
          if (sc->sc_srom_addrbits == 0)
                  return (0);
          size = TULIP_ROM_SIZE(sc->sc_srom_addrbits);
          sc->sc_srom = malloc(size, M_DEVBUF, M_NOWAIT);
  
          /* Select the SROM. */
          miirom = MIIROM_SR;
          SROM_EMIT(sc, miirom);
  
          miirom |= MIIROM_RD;
          SROM_EMIT(sc, miirom);
  
          for (i = 0; i < size; i += 2) {
                  /* Send CHIP SELECT for one clock tick. */
                  miirom |= MIIROM_SROMCS;
                  SROM_EMIT(sc, miirom);
  
                  /* Shift in the READ opcode. */
                  for (x = 3; x > 0; x--) {
                          if (TULIP_SROM_OPC_READ & (1 << (x - 1)))
                                  miirom |= MIIROM_SROMDI;
                          else
                                  miirom &= ~MIIROM_SROMDI;
                          SROM_EMIT(sc, miirom);
                          SROM_EMIT(sc, miirom|MIIROM_SROMSK);
                          SROM_EMIT(sc, miirom);
                  }
  
                  /* Shift in address. */
                  for (x = sc->sc_srom_addrbits; x > 0; x--) {
                          if (i & (1 << x))
                                  miirom |= MIIROM_SROMDI;
                          else
                                  miirom &= ~MIIROM_SROMDI;
                          SROM_EMIT(sc, miirom);
                          SROM_EMIT(sc, miirom|MIIROM_SROMSK);
                          SROM_EMIT(sc, miirom);
                  }
  
                  /* Shift out data. */
                  miirom &= ~MIIROM_SROMDI;
                  datain = 0;
                  for (x = 16; x > 0; x--) {
                          SROM_EMIT(sc, miirom|MIIROM_SROMSK);
                          if (TULIP_ISSET(sc, CSR_MIIROM, MIIROM_SROMDO))
                                  datain |= (1 << (x - 1));
                          SROM_EMIT(sc, miirom);
                  }
                  sc->sc_srom[i] = datain & 0xff;
                  sc->sc_srom[i + 1] = datain >> 8;
  
                  /* Clear CHIP SELECT. */
                  miirom &= ~MIIROM_SROMCS;
                  SROM_EMIT(sc, miirom);
          }
  
          /* Deselect the SROM. */
          SROM_EMIT(sc, 0);
  
          /* ...and idle it. */
          tlp_srom_idle(sc);
  
          if (tlp_srom_debug) {
                  printf("SROM CONTENTS:");
                  for (i = 0; i < size; i++) {
                          if ((i % 8) == 0)
                                  printf("\n\t");
                          printf("0x%02x ", sc->sc_srom[i]);
                  }
                  printf("\n");
          }
  
          return (1);
  }
  
  #undef SROM_EMIT
  
  /*
   * tlp_add_rxbuf:
   *
   *      Add a receive buffer to the indicated descriptor.
   */
  int
  tlp_add_rxbuf(sc, idx)  
          struct tulip_softc *sc;
          int idx;
  {
          struct tulip_rxsoft *rxs = &sc->sc_rxsoft[idx];
          struct mbuf *m;
          int error;
  
          MGETHDR(m, M_DONTWAIT, MT_DATA);
          if (m == NULL)
                  return (ENOBUFS);
  
          MCLAIM(m, &sc->sc_ethercom.ec_rx_mowner);
          MCLGET(m, M_DONTWAIT);
          if ((m->m_flags & M_EXT) == 0) {
                  m_freem(m);
                  return (ENOBUFS);
          }
  
          if (rxs->rxs_mbuf != NULL)
                  bus_dmamap_unload(sc->sc_dmat, rxs->rxs_dmamap);
  
          rxs->rxs_mbuf = m;
  
          error = bus_dmamap_load(sc->sc_dmat, rxs->rxs_dmamap,
              m->m_ext.ext_buf, m->m_ext.ext_size, NULL,
              BUS_DMA_READ|BUS_DMA_NOWAIT);
          if (error) {
                  printf("%s: can't load rx DMA map %d, error = %d\n",
                      sc->sc_dev.dv_xname, idx, error);
                  panic("tlp_add_rxbuf"); /* XXX */
          }
  
          bus_dmamap_sync(sc->sc_dmat, rxs->rxs_dmamap, 0,
              rxs->rxs_dmamap->dm_mapsize, BUS_DMASYNC_PREREAD);
  
          TULIP_INIT_RXDESC(sc, idx);
  
          return (0);
  }
  
  /*
   * tlp_srom_crcok:
   *
   *      Check the CRC of the Tulip SROM.
   */
  int
  tlp_srom_crcok(romdata)
          const u_int8_t *romdata;
  {
          u_int32_t crc;
  
          crc = ether_crc32_le(romdata, TULIP_ROM_CRC32_CHECKSUM);
          crc = (crc & 0xffff) ^ 0xffff;
          if (crc == TULIP_ROM_GETW(romdata, TULIP_ROM_CRC32_CHECKSUM))
                  return (1);
  
          /*
           * Try an alternate checksum.
           */
          crc = ether_crc32_le(romdata, TULIP_ROM_CRC32_CHECKSUM1);
          crc = (crc & 0xffff) ^ 0xffff;
          if (crc == TULIP_ROM_GETW(romdata, TULIP_ROM_CRC32_CHECKSUM1))
                  return (1);
  
          return (0);
  }
  
  /*
   * tlp_isv_srom:
   *
   *      Check to see if the SROM is in the new standardized format.
   */
  int
  tlp_isv_srom(romdata)
          const u_int8_t *romdata;
  {
          int i;
          u_int16_t cksum;
  
          if (tlp_srom_crcok(romdata)) {
                  /*
                   * SROM CRC checks out; must be in the new format.
                   */
                  return (1);
          }
  
          cksum = TULIP_ROM_GETW(romdata, TULIP_ROM_CRC32_CHECKSUM);
          if (cksum == 0xffff || cksum == 0) {
                  /*
                   * No checksum present.  Check the SROM ID; 18 bytes of 0
                   * followed by 1 (version) followed by the number of
                   * adapters which use this SROM (should be non-zero).
                   */
                  for (i = 0; i < TULIP_ROM_SROM_FORMAT_VERION; i++) {
                          if (romdata[i] != 0)
                                  return (0);
                  }
                  if (romdata[TULIP_ROM_SROM_FORMAT_VERION] != 1)
                          return (0);
                  if (romdata[TULIP_ROM_CHIP_COUNT] == 0)
                          return (0);
                  return (1);
          }
  
          return (0);
  }
  
  /*
   * tlp_isv_srom_enaddr:
   *
   *      Get the Ethernet address from an ISV SROM.
   */
  int
  tlp_isv_srom_enaddr(sc, enaddr)
          struct tulip_softc *sc;
          u_int8_t *enaddr;
  {
          int i, devcnt;
  
          if (tlp_isv_srom(sc->sc_srom) == 0)
                  return (0);
  
          devcnt = sc->sc_srom[TULIP_ROM_CHIP_COUNT];
          for (i = 0; i < devcnt; i++) {
                  if (sc->sc_srom[TULIP_ROM_CHIP_COUNT] == 1)
                          break;
                  if (sc->sc_srom[TULIP_ROM_CHIPn_DEVICE_NUMBER(i)] ==
                      sc->sc_devno)
                          break;
          }
  
          if (i == devcnt)
                  return (0);
  
          memcpy(enaddr, &sc->sc_srom[TULIP_ROM_IEEE_NETWORK_ADDRESS],
              ETHER_ADDR_LEN);
          enaddr[5] += i;
  
          return (1);
  }
  
  /*
   * tlp_parse_old_srom:
   *
   *      Parse old-format SROMs.
   *
   *      This routine is largely lifted from Matt Thomas's `de' driver.
   */
  int
  tlp_parse_old_srom(sc, enaddr)
          struct tulip_softc *sc;
          u_int8_t *enaddr;
  {
          static const u_int8_t testpat[] =
              { 0xff, 0, 0x55, 0xaa, 0xff, 0, 0x55, 0xaa };
          int i;
          u_int32_t cksum;
  
          if (memcmp(&sc->sc_srom[0], &sc->sc_srom[16], 8) != 0) {
                  /*
                   * Cobalt Networks interfaces simply have the address
                   * in the first six bytes. The rest is zeroed out
                   * on some models, but others contain unknown data.
                   */
                  if (sc->sc_srom[0] == 0x00 &&
                      sc->sc_srom[1] == 0x10 &&
                      sc->sc_srom[2] == 0xe0) {
                          memcpy(enaddr, sc->sc_srom, ETHER_ADDR_LEN);
                          return (1);
                  }
  
                  /*
                   * Some vendors (e.g. ZNYX) don't use the standard
                   * DEC Address ROM format, but rather just have an
                   * Ethernet address in the first 6 bytes, maybe a
                   * 2 byte checksum, and then all 0xff's.
                   */
                  for (i = 8; i < 32; i++) {
                          if (sc->sc_srom[i] != 0xff &&
                              sc->sc_srom[i] != 0)
                                  return (0);
                  }
  
                  /*
                   * Sanity check the Ethernet address:
                   *
                   *      - Make sure it's not multicast or locally
                   *        assigned
                   *      - Make sure it has a non-0 OUI
                   */
                  if (sc->sc_srom[0] & 3)
                          return (0);
                  if (sc->sc_srom[0] == 0 && sc->sc_srom[1] == 0 &&
                      sc->sc_srom[2] == 0)
                          return (0);
  
                  memcpy(enaddr, sc->sc_srom, ETHER_ADDR_LEN);
                  return (1);
          }
  
          /*
           * Standard DEC Address ROM test.
           */
  
          if (memcmp(&sc->sc_srom[24], testpat, 8) != 0)
                  return (0);
  
          for (i = 0; i < 8; i++) {
                  if (sc->sc_srom[i] != sc->sc_srom[15 - i])
                          return (0);
          }
  
          memcpy(enaddr, sc->sc_srom, ETHER_ADDR_LEN);
  
          cksum = *(u_int16_t *) &enaddr[0];
  
          cksum <<= 1;
          if (cksum > 0xffff)
                  cksum -= 0xffff;
  
          cksum += *(u_int16_t *) &enaddr[2];
          if (cksum > 0xffff)
                  cksum -= 0xffff;
  
          cksum <<= 1;
          if (cksum > 0xffff)
                  cksum -= 0xffff;
  
          cksum += *(u_int16_t *) &enaddr[4];
          if (cksum >= 0xffff)
                  cksum -= 0xffff;
  
          if (cksum != *(u_int16_t *) &sc->sc_srom[6])
                  return (0);
  
          return (1);
  }
  
  /*
   * tlp_filter_setup:
   *
   *      Set the Tulip's receive filter.
   */
  void
  tlp_filter_setup(sc)
          struct tulip_softc *sc;
  {
          struct ethercom *ec = &sc->sc_ethercom;
          struct ifnet *ifp = &sc->sc_ethercom.ec_if;
          struct ether_multi *enm;
          struct ether_multistep step;
          __volatile u_int32_t *sp;
          struct tulip_txsoft *txs;
          u_int8_t enaddr[ETHER_ADDR_LEN];
          u_int32_t hash, hashsize;
          int cnt;
  
          DPRINTF(sc, ("%s: tlp_filter_setup: sc_flags 0x%08x\n",
              sc->sc_dev.dv_xname, sc->sc_flags));
  
          memcpy(enaddr, LLADDR(ifp->if_sadl), ETHER_ADDR_LEN);
  
          /*
           * If there are transmissions pending, wait until they have
           * completed.
           */
          if (! SIMPLEQ_EMPTY(&sc->sc_txdirtyq) ||
              (sc->sc_flags & TULIPF_DOING_SETUP) != 0) {
                  sc->sc_flags |= TULIPF_WANT_SETUP;
                  DPRINTF(sc, ("%s: tlp_filter_setup: deferring\n",
                      sc->sc_dev.dv_xname));
                  return;
          }
          sc->sc_flags &= ~TULIPF_WANT_SETUP;
  
          switch (sc->sc_chip) {
          case TULIP_CHIP_82C115:
                  hashsize = TULIP_PNICII_HASHSIZE;
                  break;
  
          default:
                  hashsize = TULIP_MCHASHSIZE;
          }
  
          /*
           * If we're running, idle the transmit and receive engines.  If
           * we're NOT running, we're being called from tlp_init(), and our
           * writing OPMODE will start the transmit and receive processes
           * in motion.
           */
          if (ifp->if_flags & IFF_RUNNING)
                  tlp_idle(sc, OPMODE_ST|OPMODE_SR);
  
          sc->sc_opmode &= ~(OPMODE_PR|OPMODE_PM);
  
          if (ifp->if_flags & IFF_PROMISC) {
                  sc->sc_opmode |= OPMODE_PR;
                  goto allmulti;
          }
  
          /*
           * Try Perfect filtering first.
           */
  
          sc->sc_filtmode = TDCTL_Tx_FT_PERFECT;
          sp = TULIP_CDSP(sc);
          memset(TULIP_CDSP(sc), 0, TULIP_SETUP_PACKET_LEN);
          cnt = 0;
          ETHER_FIRST_MULTI(step, ec, enm);
          while (enm != NULL) {
                  if (memcmp(enm->enm_addrlo, enm->enm_addrhi, ETHER_ADDR_LEN)) {
                          /*
                           * We must listen to a range of multicast addresses.
                           * For now, just accept all multicasts, rather than
                           * trying to set only those filter bits needed to match
                           * the range.  (At this time, the only use of address
                           * ranges is for IP multicast routing, for which the
                           * range is big enough to require all bits set.)
                           */
                          goto allmulti;
                  }
                  if (cnt == (TULIP_MAXADDRS - 2)) {
                          /*
                           * We already have our multicast limit (still need
                           * our station address and broadcast).  Go to
                           * Hash-Perfect mode.
                           */
                          goto hashperfect;
                  }
                  cnt++;
                  *sp++ = TULIP_SP_FIELD(enm->enm_addrlo, 0);
                  *sp++ = TULIP_SP_FIELD(enm->enm_addrlo, 1);
                  *sp++ = TULIP_SP_FIELD(enm->enm_addrlo, 2);
                  ETHER_NEXT_MULTI(step, enm);
          }
          
          if (ifp->if_flags & IFF_BROADCAST) {
                  /* ...and the broadcast address. */
                  cnt++;
                  *sp++ = TULIP_SP_FIELD_C(0xffff);
                  *sp++ = TULIP_SP_FIELD_C(0xffff);
                  *sp++ = TULIP_SP_FIELD_C(0xffff);
          }
  
          /* Pad the rest with our station address. */
          for (; cnt < TULIP_MAXADDRS; cnt++) {
                  *sp++ = TULIP_SP_FIELD(enaddr, 0);
                  *sp++ = TULIP_SP_FIELD(enaddr, 1);
                  *sp++ = TULIP_SP_FIELD(enaddr, 2);
          }
          ifp->if_flags &= ~IFF_ALLMULTI;
          goto setit;
  
   hashperfect:
          /*
           * Try Hash-Perfect mode.
           */
  
          /*
           * Some 21140 chips have broken Hash-Perfect modes.  On these
           * chips, we simply use Hash-Only mode, and put our station
           * address into the filter.
           */
          if (sc->sc_chip == TULIP_CHIP_21140)
                  sc->sc_filtmode = TDCTL_Tx_FT_HASHONLY;
          else
                  sc->sc_filtmode = TDCTL_Tx_FT_HASH;
          sp = TULIP_CDSP(sc);
          memset(TULIP_CDSP(sc), 0, TULIP_SETUP_PACKET_LEN);
          ETHER_FIRST_MULTI(step, ec, enm);
          while (enm != NULL) {
                  if (memcmp(enm->enm_addrlo, enm->enm_addrhi, ETHER_ADDR_LEN)) {
                          /*
                           * We must listen to a range of multicast addresses.
                           * For now, just accept all multicasts, rather than
                           * trying to set only those filter bits needed to match
                           * the range.  (At this time, the only use of address
                           * ranges is for IP multicast routing, for which the
                           * range is big enough to require all bits set.)
                           */
                          goto allmulti;
                  }
                  hash = tlp_mchash(enm->enm_addrlo, hashsize);
                  sp[hash >> 4] |= htole32(1 << (hash & 0xf));
                  ETHER_NEXT_MULTI(step, enm);
          }
  
          if (ifp->if_flags & IFF_BROADCAST) {
                  /* ...and the broadcast address. */
                  hash = tlp_mchash(etherbroadcastaddr, hashsize);
                  sp[hash >> 4] |= htole32(1 << (hash & 0xf));
          }
  
          if (sc->sc_filtmode == TDCTL_Tx_FT_HASHONLY) {
                  /* ...and our station address. */
                  hash = tlp_mchash(enaddr, hashsize);
                  sp[hash >> 4] |= htole32(1 << (hash & 0xf));
          } else {
                  /*
                   * Hash-Perfect mode; put our station address after
                   * the hash table.
                   */
                  sp[39] = TULIP_SP_FIELD(enaddr, 0);
                  sp[40] = TULIP_SP_FIELD(enaddr, 1);
                  sp[41] = TULIP_SP_FIELD(enaddr, 2);
          }
          ifp->if_flags &= ~IFF_ALLMULTI;
          goto setit;
  
   allmulti:
          /*
           * Use Perfect filter mode.  First address is the broadcast address,
           * and pad the rest with our station address.  We'll set Pass-all-
           * multicast in OPMODE below.
           */
          sc->sc_filtmode = TDCTL_Tx_FT_PERFECT;
          sp = TULIP_CDSP(sc);
          memset(TULIP_CDSP(sc), 0, TULIP_SETUP_PACKET_LEN);
          cnt = 0;
          if (ifp->if_flags & IFF_BROADCAST) {
                  cnt++;
                  *sp++ = TULIP_SP_FIELD_C(0xffff);
                  *sp++ = TULIP_SP_FIELD_C(0xffff);
                  *sp++ = TULIP_SP_FIELD_C(0xffff);
          }
          for (; cnt < TULIP_MAXADDRS; cnt++) {
                  *sp++ = TULIP_SP_FIELD(enaddr, 0);
                  *sp++ = TULIP_SP_FIELD(enaddr, 1);
                  *sp++ = TULIP_SP_FIELD(enaddr, 2);
          }
          ifp->if_flags |= IFF_ALLMULTI;
  
   setit:
          if (ifp->if_flags & IFF_ALLMULTI)
                  sc->sc_opmode |= OPMODE_PM;
  
          /* Sync the setup packet buffer. */
          TULIP_CDSPSYNC(sc, BUS_DMASYNC_PREWRITE);
  
          /*
           * Fill in the setup packet descriptor.
           */
          txs = SIMPLEQ_FIRST(&sc->sc_txfreeq);
  
          txs->txs_firstdesc = sc->sc_txnext;
          txs->txs_lastdesc = sc->sc_txnext;
          txs->txs_ndescs = 1;
          txs->txs_mbuf = NULL;
  
          sc->sc_txdescs[sc->sc_txnext].td_bufaddr1 =
              htole32(TULIP_CDSPADDR(sc));
          sc->sc_txdescs[sc->sc_txnext].td_ctl =
              htole32((TULIP_SETUP_PACKET_LEN << TDCTL_SIZE1_SHIFT) |
              sc->sc_filtmode | TDCTL_Tx_SET | sc->sc_setup_fsls |
              TDCTL_Tx_IC | sc->sc_tdctl_ch |
              (sc->sc_txnext == (TULIP_NTXDESC - 1) ? sc->sc_tdctl_er : 0));
          sc->sc_txdescs[sc->sc_txnext].td_status = htole32(TDSTAT_OWN);
          TULIP_CDTXSYNC(sc, sc->sc_txnext, txs->txs_ndescs,
              BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE);
  
          /* Advance the tx pointer. */
          sc->sc_txfree -= 1;
          sc->sc_txnext = TULIP_NEXTTX(sc->sc_txnext);
  
          SIMPLEQ_REMOVE_HEAD(&sc->sc_txfreeq, txs_q);
          SIMPLEQ_INSERT_TAIL(&sc->sc_txdirtyq, txs, txs_q);
  
          /*
           * Set the OPMODE register.  This will also resume the
           * transmit transmit process we idled above.
           */
          TULIP_WRITE(sc, CSR_OPMODE, sc->sc_opmode);
  
          sc->sc_flags |= TULIPF_DOING_SETUP;
  
          /*
           * Kick the transmitter; this will cause the Tulip to
           * read the setup descriptor.
           */
          /* XXX USE AUTOPOLLING? */
          TULIP_WRITE(sc, CSR_TXPOLL, TXPOLL_TPD);
  
          /* Set up a watchdog timer in case the chip flakes out. */
          ifp->if_timer = 5;
  
          DPRINTF(sc, ("%s: tlp_filter_setup: returning\n", sc->sc_dev.dv_xname));
  }
  
  /*
   * tlp_winb_filter_setup:
   *
   *      Set the Winbond 89C840F's receive filter.
   */
  void
  tlp_winb_filter_setup(sc)
          struct tulip_softc *sc;
  {
          struct ethercom *ec = &sc->sc_ethercom;
          struct ifnet *ifp = &sc->sc_ethercom.ec_if;
          struct ether_multi *enm;
          struct ether_multistep step;
          u_int32_t hash, mchash[2];
  
          DPRINTF(sc, ("%s: tlp_winb_filter_setup: sc_flags 0x%08x\n",
              sc->sc_dev.dv_xname, sc->sc_flags));
  
          sc->sc_opmode &= ~(OPMODE_WINB_APP|OPMODE_WINB_AMP|OPMODE_WINB_ABP);
  
          if (ifp->if_flags & IFF_MULTICAST)
                  sc->sc_opmode |= OPMODE_WINB_AMP;
  
          if (ifp->if_flags & IFF_BROADCAST)
                  sc->sc_opmode |= OPMODE_WINB_ABP;
  
          if (ifp->if_flags & IFF_PROMISC) {
                  sc->sc_opmode |= OPMODE_WINB_APP;
                  goto allmulti;
          }
  
          mchash[0] = mchash[1] = 0;
  
          ETHER_FIRST_MULTI(step, ec, enm);
          while (enm != NULL) {
                  if (memcmp(enm->enm_addrlo, enm->enm_addrhi, ETHER_ADDR_LEN)) {
                          /*
                           * We must listen to a range of multicast addresses.
                           * For now, just accept all multicasts, rather than
                           * trying to set only those filter bits needed to match
                           * the range.  (At this time, the only use of address
                           * ranges is for IP multicast routing, for which the
                           * range is big enough to require all bits set.)
                           */
                          goto allmulti;
                  }
  
                  /*
                   * According to the FreeBSD `wb' driver, yes, you
                   * really do invert the hash.
                   */
                  hash =
                      (~(ether_crc32_le(enm->enm_addrlo, ETHER_ADDR_LEN) >> 26))
                      & 0x3f;
                  mchash[hash >> 5] |= 1 << (hash & 0x1f);
                  ETHER_NEXT_MULTI(step, enm);
          }
          ifp->if_flags &= ~IFF_ALLMULTI;
          goto setit;
  
   allmulti:
          ifp->if_flags |= IFF_ALLMULTI;
          mchash[0] = mchash[1] = 0xffffffff;
  
   setit:
          TULIP_WRITE(sc, CSR_WINB_CMA0, mchash[0]);
          TULIP_WRITE(sc, CSR_WINB_CMA1, mchash[1]);
          TULIP_WRITE(sc, CSR_OPMODE, sc->sc_opmode);
          DPRINTF(sc, ("%s: tlp_winb_filter_setup: returning\n",
              sc->sc_dev.dv_xname));
  }
  
  /*
   * tlp_al981_filter_setup:
   *
   *      Set the ADMtek AL981's receive filter.
   */
  void
  tlp_al981_filter_setup(sc)
          struct tulip_softc *sc;
  {
          struct ethercom *ec = &sc->sc_ethercom;
          struct ifnet *ifp = &sc->sc_ethercom.ec_if; 
          struct ether_multi *enm;
          struct ether_multistep step;
          u_int32_t hash, mchash[2];
  
          /*
           * If the chip is running, we need to reset the interface,
           * and will revisit here (with IFF_RUNNING) clear.  The
           * chip seems to really not like to have its multicast
           * filter programmed without a reset.
           */
          if (ifp->if_flags & IFF_RUNNING) {
                  (void) tlp_init(ifp);
                  return;
          }
  
          DPRINTF(sc, ("%s: tlp_al981_filter_setup: sc_flags 0x%08x\n",
              sc->sc_dev.dv_xname, sc->sc_flags));
  
          sc->sc_opmode &= ~(OPMODE_PR|OPMODE_PM);
  
          if (ifp->if_flags & IFF_PROMISC) {
                  sc->sc_opmode |= OPMODE_PR;
                  goto allmulti;
          }
  
          mchash[0] = mchash[1] = 0;
  
          ETHER_FIRST_MULTI(step, ec, enm);
          while (enm != NULL) {
                  if (memcmp(enm->enm_addrlo, enm->enm_addrhi, ETHER_ADDR_LEN)) {
                          /*
                           * We must listen to a range of multicast addresses.
                           * For now, just accept all multicasts, rather than
                           * trying to set only those filter bits needed to match
                           * the range.  (At this time, the only use of address
                           * ranges is for IP multicast routing, for which the
                           * range is big enough to require all bits set.)
                           */
                          goto allmulti;
                  }
  
                  hash = ether_crc32_le(enm->enm_addrlo, ETHER_ADDR_LEN) & 0x3f;
                  mchash[hash >> 5] |= 1 << (hash & 0x1f);
                  ETHER_NEXT_MULTI(step, enm);
          }
          ifp->if_flags &= ~IFF_ALLMULTI;
          goto setit;
  
   allmulti:
          ifp->if_flags |= IFF_ALLMULTI;
          mchash[0] = mchash[1] = 0xffffffff;
  
   setit:
          bus_space_write_4(sc->sc_st, sc->sc_sh, CSR_ADM_MAR0, mchash[0]);
          bus_space_write_4(sc->sc_st, sc->sc_sh, CSR_ADM_MAR1, mchash[1]);
          TULIP_WRITE(sc, CSR_OPMODE, sc->sc_opmode);
          DPRINTF(sc, ("%s: tlp_al981_filter_setup: returning\n",
              sc->sc_dev.dv_xname));
  }
  
  /*
   * tlp_idle:
   *
   *      Cause the transmit and/or receive processes to go idle.
   */
  void
  tlp_idle(sc, bits)
          struct tulip_softc *sc;
          u_int32_t bits;
  {
          static const char * const tlp_tx_state_names[] = {
                  "STOPPED",
                  "RUNNING - FETCH",
                  "RUNNING - WAIT",
                  "RUNNING - READING",
                  "-- RESERVED --",
                  "RUNNING - SETUP",
                  "SUSPENDED",
                  "RUNNING - CLOSE",
          };
          static const char * const tlp_rx_state_names[] = {
                  "STOPPED",
                  "RUNNING - FETCH",
                  "RUNNING - CHECK",
                  "RUNNING - WAIT",
                  "SUSPENDED",
                  "RUNNING - CLOSE",
                  "RUNNING - FLUSH",
                  "RUNNING - QUEUE",
          };
          static const char * const dm9102_tx_state_names[] = {
                  "STOPPED",
                  "RUNNING - FETCH",
                  "RUNNING - SETUP",
                  "RUNNING - READING",
                  "RUNNING - CLOSE - CLEAR OWNER",
                  "RUNNING - WAIT",
                  "RUNNING - CLOSE - WRITE STATUS",
                  "SUSPENDED",
          };
          static const char * const dm9102_rx_state_names[] = {
                  "STOPPED",
                  "RUNNING - FETCH",
                  "RUNNING - WAIT",
                  "RUNNING - QUEUE",
                  "RUNNING - CLOSE - CLEAR OWNER",
                  "RUNNING - CLOSE - WRITE STATUS",
                  "SUSPENDED",
                  "RUNNING - FLUSH",
          };
  
          const char * const *tx_state_names, * const *rx_state_names;
          u_int32_t csr, ackmask = 0;
          int i;
  
          switch (sc->sc_chip) {
          case TULIP_CHIP_DM9102:
          case TULIP_CHIP_DM9102A:
                  tx_state_names = dm9102_tx_state_names;
                  rx_state_names = dm9102_rx_state_names;
                  break;
  
          default:
                  tx_state_names = tlp_tx_state_names;
                  rx_state_names = tlp_rx_state_names;
                  break;
          }
  
          if (bits & OPMODE_ST)
                  ackmask |= STATUS_TPS;
  
          if (bits & OPMODE_SR)
                  ackmask |= STATUS_RPS;
  
          TULIP_WRITE(sc, CSR_OPMODE, sc->sc_opmode & ~bits);
  
          for (i = 0; i < 1000; i++) {
                  if (TULIP_ISSET(sc, CSR_STATUS, ackmask) == ackmask)
                          break;
                  delay(10);
          }
  
          csr = TULIP_READ(sc, CSR_STATUS);
          if ((csr & ackmask) != ackmask) {
                  if ((bits & OPMODE_ST) != 0 && (csr & STATUS_TPS) == 0 &&
                      (csr & STATUS_TS) != STATUS_TS_STOPPED) {
                          printf("%s: transmit process failed to idle: "
                              "state %s\n", sc->sc_dev.dv_xname,
                              tx_state_names[(csr & STATUS_TS) >> 20]);
                  }
                  if ((bits & OPMODE_SR) != 0 && (csr & STATUS_RPS) == 0 &&
                      (csr & STATUS_RS) != STATUS_RS_STOPPED) {
                          switch (sc->sc_chip) {
                          case TULIP_CHIP_AN983:
                          case TULIP_CHIP_AN985:
                          case TULIP_CHIP_DM9102A:
                                  /*
                                   * Filter the message out on noisy chips.
                                   */
                                  break;
                          default:
                                  printf("%s: receive process failed to idle: "
                                      "state %s\n", sc->sc_dev.dv_xname,
                                      rx_state_names[(csr & STATUS_RS) >> 17]);
                          }
                  }
          }
          TULIP_WRITE(sc, CSR_STATUS, ackmask);
  }
  
  /*****************************************************************************
   * Generic media support functions.
   *****************************************************************************/
  
  /*
   * tlp_mediastatus:     [ifmedia interface function]
   *
   *      Query the current media.
   */
  void
  tlp_mediastatus(ifp, ifmr)
          struct ifnet *ifp;
          struct ifmediareq *ifmr;
  {
          struct tulip_softc *sc = ifp->if_softc;
  
          if (TULIP_IS_ENABLED(sc) == 0) {
                  ifmr->ifm_active = IFM_ETHER | IFM_NONE;
                  ifmr->ifm_status = 0;
                  return;
          }
  
          (*sc->sc_mediasw->tmsw_get)(sc, ifmr);
  }
  
  /*
   * tlp_mediachange:     [ifmedia interface function]
   *
   *      Update the current media.
   */
  int
  tlp_mediachange(ifp)
          struct ifnet *ifp;
  {
          struct tulip_softc *sc = ifp->if_softc;
  
          if ((ifp->if_flags & IFF_UP) == 0)
                  return (0);
          return ((*sc->sc_mediasw->tmsw_set)(sc));
  }
  
  /*****************************************************************************
   * Support functions for MII-attached media.
   *****************************************************************************/
  
  /*
   * tlp_mii_tick:
   *
   *      One second timer, used to tick the MII.
   */
  void
  tlp_mii_tick(arg)
          void *arg;
  {
          struct tulip_softc *sc = arg;
          int s;
  
          if ((sc->sc_dev.dv_flags & DVF_ACTIVE) == 0)
                  return;
  
          s = splnet();
          mii_tick(&sc->sc_mii);
          splx(s);
  
          callout_reset(&sc->sc_tick_callout, hz, sc->sc_tick, sc);
  }
  
  /*
   * tlp_mii_statchg:     [mii interface function]
   *
   *      Callback from PHY when media changes.
   */
  void
  tlp_mii_statchg(self)
          struct device *self;
  {
          struct tulip_softc *sc = (struct tulip_softc *)self;
  
          /* Idle the transmit and receive processes. */
          tlp_idle(sc, OPMODE_ST|OPMODE_SR);
  
          sc->sc_opmode &= ~(OPMODE_TTM|OPMODE_FD|OPMODE_HBD);
  
          if (IFM_SUBTYPE(sc->sc_mii.mii_media_active) == IFM_10_T)
                  sc->sc_opmode |= OPMODE_TTM;
          else
                  sc->sc_opmode |= OPMODE_HBD;
  
          if (sc->sc_mii.mii_media_active & IFM_FDX)
                  sc->sc_opmode |= OPMODE_FD|OPMODE_HBD;
  
          /*
           * Write new OPMODE bits.  This also restarts the transmit
           * and receive processes.
           */
          TULIP_WRITE(sc, CSR_OPMODE, sc->sc_opmode);
  }
  
  /*
   * tlp_winb_mii_statchg: [mii interface function]
   *
   *      Callback from PHY when media changes.  This version is
   *      for the Winbond 89C840F, which has different OPMODE bits.
   */
  void
  tlp_winb_mii_statchg(self)
          struct device *self;
  {
          struct tulip_softc *sc = (struct tulip_softc *)self;
  
          /* Idle the transmit and receive processes. */
          tlp_idle(sc, OPMODE_ST|OPMODE_SR);
  
          sc->sc_opmode &= ~(OPMODE_WINB_FES|OPMODE_FD);
  
          if (IFM_SUBTYPE(sc->sc_mii.mii_media_active) == IFM_100_TX)
                  sc->sc_opmode |= OPMODE_WINB_FES;
  
          if (sc->sc_mii.mii_media_active & IFM_FDX)
                  sc->sc_opmode |= OPMODE_FD;
  
          /*
           * Write new OPMODE bits.  This also restarts the transmit
           * and receive processes.
           */
          TULIP_WRITE(sc, CSR_OPMODE, sc->sc_opmode);
  }
  
  /*
   * tlp_dm9102_mii_statchg: [mii interface function]
   *
   *      Callback from PHY when media changes.  This version is
   *      for the DM9102.
   */
  void
  tlp_dm9102_mii_statchg(self)
          struct device *self;
  {
          struct tulip_softc *sc = (struct tulip_softc *)self;
  
          /*
           * Don't idle the transmit and receive processes, here.  It
           * seems to fail, and just causes excess noise.
           */
          sc->sc_opmode &= ~(OPMODE_TTM|OPMODE_FD);
  
          if (IFM_SUBTYPE(sc->sc_mii.mii_media_active) != IFM_100_TX)
                  sc->sc_opmode |= OPMODE_TTM;
  
          if (sc->sc_mii.mii_media_active & IFM_FDX)
                  sc->sc_opmode |= OPMODE_FD;
  
          /*
           * Write new OPMODE bits.
           */
          TULIP_WRITE(sc, CSR_OPMODE, sc->sc_opmode);
  }
  
  /*
   * tlp_mii_getmedia:
   *
   *      Callback from ifmedia to request current media status.
   */
  void
  tlp_mii_getmedia(sc, ifmr)
          struct tulip_softc *sc;
          struct ifmediareq *ifmr;
  {
  
          mii_pollstat(&sc->sc_mii);
          ifmr->ifm_status = sc->sc_mii.mii_media_status;
          ifmr->ifm_active = sc->sc_mii.mii_media_active;
  }
  
  /*
   * tlp_mii_setmedia:
   *
   *      Callback from ifmedia to request new media setting.
   */
  int
  tlp_mii_setmedia(sc)
          struct tulip_softc *sc;
  {
          struct ifnet *ifp = &sc->sc_ethercom.ec_if;
  
          if (ifp->if_flags & IFF_UP) {
                  switch (sc->sc_chip) {
                  case TULIP_CHIP_21142:
                  case TULIP_CHIP_21143:
                          /* Disable the internal Nway engine. */
                          TULIP_WRITE(sc, CSR_SIATXRX, 0);
                          break;
  
                  default:
                          /* Nothing. */
                          break;
                  }
                  mii_mediachg(&sc->sc_mii);
          }
          return (0);
  }
  
  /*
   * tlp_bitbang_mii_readreg:
   *
   *      Read a PHY register via bit-bang'ing the MII.
   */
  int
  tlp_bitbang_mii_readreg(self, phy, reg)
          struct device *self;
          int phy, reg;
  {
          struct tulip_softc *sc = (void *) self;
  
          return (mii_bitbang_readreg(self, sc->sc_bitbang_ops, phy, reg));
  }
  
  /*
   * tlp_bitbang_mii_writereg:
   *
   *      Write a PHY register via bit-bang'ing the MII.
   */
  void
  tlp_bitbang_mii_writereg(self, phy, reg, val)
          struct device *self;
          int phy, reg, val;
  {
          struct tulip_softc *sc = (void *) self;
  
          mii_bitbang_writereg(self, sc->sc_bitbang_ops, phy, reg, val);
  }
  
  /*
   * tlp_sio_mii_bitbang_read:
   *
   *      Read the MII serial port for the MII bit-bang module.
   */
  u_int32_t
  tlp_sio_mii_bitbang_read(self)
          struct device *self;
  {
          struct tulip_softc *sc = (void *) self;
  
          return (TULIP_READ(sc, CSR_MIIROM));
  }
  
  /*
   * tlp_sio_mii_bitbang_write:
   *
   *      Write the MII serial port for the MII bit-bang module.
   */
  void
  tlp_sio_mii_bitbang_write(self, val)
          struct device *self;
          u_int32_t val;
  {
          struct tulip_softc *sc = (void *) self;
  
          TULIP_WRITE(sc, CSR_MIIROM, val);
  }
  
  /*
   * tlp_pnic_mii_readreg:
   *
   *      Read a PHY register on the Lite-On PNIC.
   */
  int
  tlp_pnic_mii_readreg(self, phy, reg)
          struct device *self;
          int phy, reg;
  {
          struct tulip_softc *sc = (void *) self;
          u_int32_t val;
          int i;
  
          TULIP_WRITE(sc, CSR_PNIC_MII,
              PNIC_MII_MBO | PNIC_MII_RESERVED |
              PNIC_MII_READ | (phy << PNIC_MII_PHYSHIFT) |
              (reg << PNIC_MII_REGSHIFT));
  
          for (i = 0; i < 1000; i++) {
                  delay(10);
                  val = TULIP_READ(sc, CSR_PNIC_MII);
                  if ((val & PNIC_MII_BUSY) == 0) {
                          if ((val & PNIC_MII_DATA) == PNIC_MII_DATA)
                                  return (0);
                          else
                                  return (val & PNIC_MII_DATA);
                  }
          }
          printf("%s: MII read timed out\n", sc->sc_dev.dv_xname);
          return (0);
  }
  
  /*
   * tlp_pnic_mii_writereg:
   *
   *      Write a PHY register on the Lite-On PNIC.
   */
  void
  tlp_pnic_mii_writereg(self, phy, reg, val)
          struct device *self;
          int phy, reg, val;
  {
          struct tulip_softc *sc = (void *) self;
          int i;
  
          TULIP_WRITE(sc, CSR_PNIC_MII,
              PNIC_MII_MBO | PNIC_MII_RESERVED |
              PNIC_MII_WRITE | (phy << PNIC_MII_PHYSHIFT) |
              (reg << PNIC_MII_REGSHIFT) | val);
  
          for (i = 0; i < 1000; i++) {
                  delay(10);
                  if (TULIP_ISSET(sc, CSR_PNIC_MII, PNIC_MII_BUSY) == 0)
                          return;
          }
          printf("%s: MII write timed out\n", sc->sc_dev.dv_xname);
  }
  
  const bus_addr_t tlp_al981_phy_regmap[] = {
          CSR_ADM_BMCR,
          CSR_ADM_BMSR,
          CSR_ADM_PHYIDR1,
          CSR_ADM_PHYIDR2,
          CSR_ADM_ANAR,
          CSR_ADM_ANLPAR,
          CSR_ADM_ANER,
  
          CSR_ADM_XMC,
          CSR_ADM_XCIIS,
          CSR_ADM_XIE,
          CSR_ADM_100CTR,
  };
  const int tlp_al981_phy_regmap_size = sizeof(tlp_al981_phy_regmap) /
      sizeof(tlp_al981_phy_regmap[0]);
  
  /*
   * tlp_al981_mii_readreg:
   *
   *      Read a PHY register on the ADMtek AL981.
   */
  int
  tlp_al981_mii_readreg(self, phy, reg)
          struct device *self;
          int phy, reg;
  {
          struct tulip_softc *sc = (struct tulip_softc *)self;
  
          /* AL981 only has an internal PHY. */
          if (phy != 0)
                  return (0);
  
          if (reg >= tlp_al981_phy_regmap_size)
                  return (0);
  
          return (bus_space_read_4(sc->sc_st, sc->sc_sh,
              tlp_al981_phy_regmap[reg]) & 0xffff);
  }
  
  /*
   * tlp_al981_mii_writereg:
   *
   *      Write a PHY register on the ADMtek AL981.
   */
  void
  tlp_al981_mii_writereg(self, phy, reg, val)
          struct device *self;
          int phy, reg, val;
  {
          struct tulip_softc *sc = (struct tulip_softc *)self;
  
          /* AL981 only has an internal PHY. */
          if (phy != 0)
                  return;
  
          if (reg >= tlp_al981_phy_regmap_size)
                  return;
  
          bus_space_write_4(sc->sc_st, sc->sc_sh,
              tlp_al981_phy_regmap[reg], val);
  }
  
  /*****************************************************************************
   * Chip-specific pre-init and reset functions.
   *****************************************************************************/
  
  /*
   * tlp_2114x_preinit:
   *
   *      Pre-init function shared by DECchip 21140, 21140A, 21142, and 21143.
   */
  void
  tlp_2114x_preinit(sc)
          struct tulip_softc *sc;
  {
          struct ifmedia_entry *ife = sc->sc_mii.mii_media.ifm_cur;
          struct tulip_21x4x_media *tm = ife->ifm_aux;
  
          /*
           * Whether or not we're in MII or SIA/SYM mode, the media info
           * contains the appropriate OPMODE bits.
           *
           * Also, we always set the Must-Be-One bit.
           */
          sc->sc_opmode |= OPMODE_MBO | tm->tm_opmode;
  
          TULIP_WRITE(sc, CSR_OPMODE, sc->sc_opmode);
  }
  
  /*
   * tlp_2114x_mii_preinit:
   *
   *      Pre-init function shared by DECchip 21140, 21140A, 21142, and 21143.
   *      This version is used by boards which only have MII and don't have
   *      an ISV SROM.
   */
  void
  tlp_2114x_mii_preinit(sc)
          struct tulip_softc *sc;
  {
  
          /*
           * Always set the Must-Be-One bit, and Port Select (to select MII).
           * We'll never be called during a media change.
           */
          sc->sc_opmode |= OPMODE_MBO|OPMODE_PS;
          TULIP_WRITE(sc, CSR_OPMODE, sc->sc_opmode);
  }
  
  /*
   * tlp_pnic_preinit:
   *
   *      Pre-init function for the Lite-On 82c168 and 82c169.
   */
  void
  tlp_pnic_preinit(sc)
          struct tulip_softc *sc;
  {
  
          if (sc->sc_flags & TULIPF_HAS_MII) {
                  /*
                   * MII case: just set the port-select bit; we will never
                   * be called during a media change.
                   */
                  sc->sc_opmode |= OPMODE_PS;
          } else {
                  /*
                   * ENDEC/PCS/Nway mode; enable the Tx backoff counter.
                   */
                  sc->sc_opmode |= OPMODE_PNIC_TBEN;
          }
  }
  
  /*
   * tlp_dm9102_preinit:
   *
   *      Pre-init function for the Davicom DM9102.
   */
  void
  tlp_dm9102_preinit(sc)
          struct tulip_softc *sc;
  {
  
          switch (sc->sc_chip) {
          case TULIP_CHIP_DM9102:
                  sc->sc_opmode |= OPMODE_MBO|OPMODE_HBD|OPMODE_PS;
                  break;
  
          case TULIP_CHIP_DM9102A:
                  /*
                   * XXX Figure out how to actually deal with the HomePNA
                   * XXX portion of the DM9102A.
                   */
                  sc->sc_opmode |= OPMODE_MBO|OPMODE_HBD;
                  break;
  
          default:
                  /* Nothing. */
                  break;
          }
  
          TULIP_WRITE(sc, CSR_OPMODE, sc->sc_opmode);
  }
  
  /*
   * tlp_21140_reset:
   *
   *      Issue a reset sequence on the 21140 via the GPIO facility.
   */
  void
  tlp_21140_reset(sc)
          struct tulip_softc *sc;
  {
          struct ifmedia_entry *ife = sc->sc_mii.mii_media.ifm_cur;
          struct tulip_21x4x_media *tm = ife->ifm_aux;
          int i;
  
          /* First, set the direction on the GPIO pins. */
          TULIP_WRITE(sc, CSR_GPP, GPP_GPC|sc->sc_gp_dir);
  
          /* Now, issue the reset sequence. */
          for (i = 0; i < tm->tm_reset_length; i++) {
                  delay(10);
                  TULIP_WRITE(sc, CSR_GPP, sc->sc_srom[tm->tm_reset_offset + i]);
          }
  
          /* Now, issue the selection sequence. */
          for (i = 0; i < tm->tm_gp_length; i++) {
                  delay(10);
                  TULIP_WRITE(sc, CSR_GPP, sc->sc_srom[tm->tm_gp_offset + i]);
          }
  
          /* If there were no sequences, just lower the pins. */
          if (tm->tm_reset_length == 0 && tm->tm_gp_length == 0) {
                  delay(10);
                  TULIP_WRITE(sc, CSR_GPP, 0);
          }
  }
  
  /*
   * tlp_21142_reset:
   *
   *      Issue a reset sequence on the 21142 via the GPIO facility.
   */
  void
  tlp_21142_reset(sc)
          struct tulip_softc *sc;
  {
          struct ifmedia_entry *ife = sc->sc_mii.mii_media.ifm_cur;
          struct tulip_21x4x_media *tm = ife->ifm_aux;
          const u_int8_t *cp;
          int i;
  
          cp = &sc->sc_srom[tm->tm_reset_offset];
          for (i = 0; i < tm->tm_reset_length; i++, cp += 2) {
                  delay(10);
                  TULIP_WRITE(sc, CSR_SIAGEN, TULIP_ROM_GETW(cp, 0) << 16);
          }
  
          cp = &sc->sc_srom[tm->tm_gp_offset];
          for (i = 0; i < tm->tm_gp_length; i++, cp += 2) {
                  delay(10);
                  TULIP_WRITE(sc, CSR_SIAGEN, TULIP_ROM_GETW(cp, 0) << 16);
          }
  
          /* If there were no sequences, just lower the pins. */
          if (tm->tm_reset_length == 0 && tm->tm_gp_length == 0) {
                  delay(10);
                  TULIP_WRITE(sc, CSR_SIAGEN, 0);
          }
  }
  
  /*
   * tlp_pmac_reset:
   *
   *      Reset routine for Macronix chips.
   */
  void
  tlp_pmac_reset(sc)
          struct tulip_softc *sc;
  {
  
          switch (sc->sc_chip) {
          case TULIP_CHIP_82C115:
          case TULIP_CHIP_MX98715:
          case TULIP_CHIP_MX98715A:
          case TULIP_CHIP_MX98725:
                  /*
                   * Set the LED operating mode.  This information is located
                   * in the EEPROM at byte offset 0x77, per the MX98715A and
                   * MX98725 application notes.
                   */
                  TULIP_WRITE(sc, CSR_MIIROM, sc->sc_srom[0x77] << 24);
                  break;
          case TULIP_CHIP_MX98715AEC_X:
                  /*
                   * Set the LED operating mode.  This information is located
                   * in the EEPROM at byte offset 0x76, per the MX98715AEC
                   * application note.
                   */
                  TULIP_WRITE(sc, CSR_MIIROM, ((0xf & sc->sc_srom[0x76]) << 28)
                      | ((0xf0 & sc->sc_srom[0x76]) << 20));
                  break;
  
          default:
                  /* Nothing. */
                  break;
          }
  }
  
  /*
   * tlp_dm9102_reset:
   *
   *      Reset routine for the Davicom DM9102.
   */
  void
  tlp_dm9102_reset(sc)
          struct tulip_softc *sc;
  {
  
          TULIP_WRITE(sc, CSR_DM_PHYSTAT, DM_PHYSTAT_GEPC|DM_PHYSTAT_GPED);
          delay(100);
          TULIP_WRITE(sc, CSR_DM_PHYSTAT, 0);
  }
  
  /*****************************************************************************
   * Chip/board-specific media switches.  The ones here are ones that
   * are potentially common to multiple front-ends.
   *****************************************************************************/
  
  /*
   * This table is a common place for all sorts of media information,
   * keyed off of the SROM media code for that media.
   *
   * Note that we explicitly configure the 21142/21143 to always advertise
   * NWay capabilities when using the UTP port.
   * XXX Actually, we don't yet.
   */
  const struct tulip_srom_to_ifmedia tulip_srom_to_ifmedia_table[] = {
          { TULIP_ROM_MB_MEDIA_TP,        IFM_10_T,       0,
            "10baseT",
            OPMODE_TTM,
            BMSR_10THDX,
            { SIACONN_21040_10BASET,
              SIATXRX_21040_10BASET,
              SIAGEN_21040_10BASET },
  
            { SIACONN_21041_10BASET,
              SIATXRX_21041_10BASET,
              SIAGEN_21041_10BASET },
  
            { SIACONN_21142_10BASET,
              SIATXRX_21142_10BASET,
              SIAGEN_21142_10BASET } },
  
          { TULIP_ROM_MB_MEDIA_BNC,       IFM_10_2,       0,
            "10base2",
            0,
            0,
            { 0,
              0,
              0 },
  
            { SIACONN_21041_BNC,
              SIATXRX_21041_BNC,
              SIAGEN_21041_BNC },
  
            { SIACONN_21142_BNC,
              SIATXRX_21142_BNC,
              SIAGEN_21142_BNC } },
  
          { TULIP_ROM_MB_MEDIA_AUI,       IFM_10_5,       0,
            "10base5",
            0,
            0,
            { SIACONN_21040_AUI,
              SIATXRX_21040_AUI,
              SIAGEN_21040_AUI },
  
            { SIACONN_21041_AUI,
              SIATXRX_21041_AUI,
              SIAGEN_21041_AUI },
  
            { SIACONN_21142_AUI,
              SIATXRX_21142_AUI,
              SIAGEN_21142_AUI } },
  
          { TULIP_ROM_MB_MEDIA_100TX,     IFM_100_TX,     0,
            "100baseTX",
            OPMODE_PS|OPMODE_PCS|OPMODE_SCR|OPMODE_HBD,
            BMSR_100TXHDX,
            { 0,
              0,
              0 },
            
            { 0,
              0,
              0 },
  
            { 0,
              0,
              SIAGEN_ABM } },
  
          { TULIP_ROM_MB_MEDIA_TP_FDX,    IFM_10_T,       IFM_FDX,
            "10baseT-FDX",
            OPMODE_TTM|OPMODE_FD|OPMODE_HBD,
            BMSR_10TFDX,
            { SIACONN_21040_10BASET_FDX,
              SIATXRX_21040_10BASET_FDX,
              SIAGEN_21040_10BASET_FDX },
  
            { SIACONN_21041_10BASET_FDX,
              SIATXRX_21041_10BASET_FDX,
              SIAGEN_21041_10BASET_FDX },
  
            { SIACONN_21142_10BASET_FDX,
              SIATXRX_21142_10BASET_FDX,
              SIAGEN_21142_10BASET_FDX } },
  
          { TULIP_ROM_MB_MEDIA_100TX_FDX, IFM_100_TX,     IFM_FDX,
            "100baseTX-FDX",
            OPMODE_PS|OPMODE_PCS|OPMODE_SCR|OPMODE_FD|OPMODE_HBD,
            BMSR_100TXFDX,
            { 0,
              0,
              0 },
  
            { 0,
              0,
              0 },
  
            { 0,
              0,
              SIAGEN_ABM } },
  
          { TULIP_ROM_MB_MEDIA_100T4,     IFM_100_T4,     0,
            "100baseT4",
            OPMODE_PS|OPMODE_PCS|OPMODE_SCR|OPMODE_HBD,
            BMSR_100T4,
            { 0,
              0,
              0 },
  
            { 0,
              0,
              0 },
  
            { 0,
              0,
              SIAGEN_ABM } },
  
          { TULIP_ROM_MB_MEDIA_100FX,     IFM_100_FX,     0,
            "100baseFX",
            OPMODE_PS|OPMODE_PCS|OPMODE_HBD,
            0,
            { 0,
              0,
              0 },
  
            { 0,
              0,
              0 },
  
            { 0,
              0,
              SIAGEN_ABM } },
  
          { TULIP_ROM_MB_MEDIA_100FX_FDX, IFM_100_FX,     IFM_FDX,
            "100baseFX-FDX",
            OPMODE_PS|OPMODE_PCS|OPMODE_FD|OPMODE_HBD,
            0,
            { 0,
              0,
              0 },
  
            { 0,
              0,
              0 },
  
            { 0,
              0,
              SIAGEN_ABM } },
  
          { 0,                            0,              0,
            NULL,
            0,
            0,
            { 0,
              0,
              0 },
  
            { 0,
              0,
              0 },
  
            { 0,
              0,
              0 } },
  };
  
  const struct tulip_srom_to_ifmedia *tlp_srom_to_ifmedia __P((u_int8_t));
  void    tlp_srom_media_info __P((struct tulip_softc *,
              const struct tulip_srom_to_ifmedia *, struct tulip_21x4x_media *));
  void    tlp_add_srom_media __P((struct tulip_softc *, int,
              void (*)(struct tulip_softc *, struct ifmediareq *),
              int (*)(struct tulip_softc *), const u_int8_t *, int));
  void    tlp_print_media __P((struct tulip_softc *));
  void    tlp_nway_activate __P((struct tulip_softc *, int));
  void    tlp_get_minst __P((struct tulip_softc *));
  
  const struct tulip_srom_to_ifmedia *
  tlp_srom_to_ifmedia(sm)
          u_int8_t sm;
  {
          const struct tulip_srom_to_ifmedia *tsti;
  
          for (tsti = tulip_srom_to_ifmedia_table;
               tsti->tsti_name != NULL; tsti++) {
                  if (tsti->tsti_srom == sm)
                          return (tsti);
          }
  
          return (NULL);
  }
  
  void
  tlp_srom_media_info(sc, tsti, tm)
          struct tulip_softc *sc;
          const struct tulip_srom_to_ifmedia *tsti;
          struct tulip_21x4x_media *tm;
  {
  
          tm->tm_name = tsti->tsti_name;
          tm->tm_opmode = tsti->tsti_opmode;
  
          sc->sc_sia_cap |= tsti->tsti_sia_cap;
  
          switch (sc->sc_chip) {
          case TULIP_CHIP_DE425:
          case TULIP_CHIP_21040:
                  tm->tm_sia = tsti->tsti_21040;  /* struct assignment */
                  break;
  
          case TULIP_CHIP_21041:
                  tm->tm_sia = tsti->tsti_21041;  /* struct assignment */
                  break;
  
          case TULIP_CHIP_21142:
          case TULIP_CHIP_21143:
          case TULIP_CHIP_82C115:
          case TULIP_CHIP_MX98715:
          case TULIP_CHIP_MX98715A:
          case TULIP_CHIP_MX98715AEC_X:
          case TULIP_CHIP_MX98725:
                  tm->tm_sia = tsti->tsti_21142;  /* struct assignment */
                  break;
  
          default:
                  /* Nothing. */
                  break;
          }
  }
  
  void
  tlp_add_srom_media(sc, type, get, set, list, cnt)
          struct tulip_softc *sc;
          int type;
          void (*get) __P((struct tulip_softc *, struct ifmediareq *));
          int (*set) __P((struct tulip_softc *));
          const u_int8_t *list;
          int cnt;
  {
          struct tulip_21x4x_media *tm;
          const struct tulip_srom_to_ifmedia *tsti;
          int i;
  
          for (i = 0; i < cnt; i++) {
                  tsti = tlp_srom_to_ifmedia(list[i]);
                  tm = malloc(sizeof(*tm), M_DEVBUF, M_WAITOK|M_ZERO);
                  tlp_srom_media_info(sc, tsti, tm);
                  tm->tm_type = type;
                  tm->tm_get = get;
                  tm->tm_set = set;
  
                  ifmedia_add(&sc->sc_mii.mii_media,
                      IFM_MAKEWORD(IFM_ETHER, tsti->tsti_subtype,
                      tsti->tsti_options, sc->sc_tlp_minst), 0, tm);
          }
  }
  
  void
  tlp_print_media(sc)
          struct tulip_softc *sc;
  {
          struct ifmedia_entry *ife;
          struct tulip_21x4x_media *tm;
          const char *sep = "";
  
  #define PRINT(str)      printf("%s%s", sep, str); sep = ", "
  
          printf("%s: ", sc->sc_dev.dv_xname);
          for (ife = TAILQ_FIRST(&sc->sc_mii.mii_media.ifm_list);
               ife != NULL; ife = TAILQ_NEXT(ife, ifm_list)) {
                  tm = ife->ifm_aux;
                  if (tm == NULL) {
  #ifdef DIAGNOSTIC
                          if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO)
                                  panic("tlp_print_media");
  #endif
                          PRINT("auto");
                  } else if (tm->tm_type != TULIP_ROM_MB_21140_MII &&
                             tm->tm_type != TULIP_ROM_MB_21142_MII) {
                          PRINT(tm->tm_name);
                  }
          }
          printf("\n");
  
  #undef PRINT
  }
  
  void
  tlp_nway_activate(sc, media)
          struct tulip_softc *sc;
          int media;
  {
          struct ifmedia_entry *ife;
  
          ife = ifmedia_match(&sc->sc_mii.mii_media, media, 0);
  #ifdef DIAGNOSTIC
          if (ife == NULL)
                  panic("tlp_nway_activate");
  #endif
          sc->sc_nway_active = ife;
  }
  
  void
  tlp_get_minst(sc)
          struct tulip_softc *sc;
  {
  
          if ((sc->sc_media_seen &
              ~((1 << TULIP_ROM_MB_21140_MII) |
                (1 << TULIP_ROM_MB_21142_MII))) == 0) {
                  /*
                   * We have not yet seen any SIA/SYM media (but are
                   * about to; that's why we're called!), so assign
                   * the current media instance to be the `internal media'
                   * instance, and advance it so any MII media gets a
                   * fresh one (used to selecting/isolating a PHY).
                   */
                  sc->sc_tlp_minst = sc->sc_mii.mii_instance++;
          }
  }
  
  /*
   * SIA Utility functions.
   */
  void    tlp_sia_update_link __P((struct tulip_softc *));
  void    tlp_sia_get __P((struct tulip_softc *, struct ifmediareq *));
  int     tlp_sia_set __P((struct tulip_softc *));
  int     tlp_sia_media __P((struct tulip_softc *, struct ifmedia_entry *));
  void    tlp_sia_fixup __P((struct tulip_softc *));
  
  void
  tlp_sia_update_link(sc)
          struct tulip_softc *sc;
  {
          struct ifmedia_entry *ife;
          struct tulip_21x4x_media *tm;
          u_int32_t siastat;
  
          ife = TULIP_CURRENT_MEDIA(sc);
          tm = ife->ifm_aux;
  
          sc->sc_flags &= ~(TULIPF_LINK_UP|TULIPF_LINK_VALID);
  
          siastat = TULIP_READ(sc, CSR_SIASTAT);
  
          /*
           * Note that when we do SIA link tests, we are assuming that
           * the chip is really in the mode that the current media setting
           * reflects.  If we're not, then the link tests will not be
           * accurate!
           */
          switch (IFM_SUBTYPE(ife->ifm_media)) {
          case IFM_10_T:
                  sc->sc_flags |= TULIPF_LINK_VALID;
                  if ((siastat & SIASTAT_LS10) == 0)
                          sc->sc_flags |= TULIPF_LINK_UP;
                  break;
  
          case IFM_100_TX:
          case IFM_100_T4:
                  sc->sc_flags |= TULIPF_LINK_VALID;
                  if ((siastat & SIASTAT_LS100) == 0)
                          sc->sc_flags |= TULIPF_LINK_UP;
                  break;
          }
  
          switch (sc->sc_chip) {
          case TULIP_CHIP_21142:
          case TULIP_CHIP_21143:
                  /*
                   * On these chips, we can tell more information about
                   * AUI/BNC.  Note that the AUI/BNC selection is made
                   * in a different register; for our purpose, it's all
                   * AUI.
                   */
                  switch (IFM_SUBTYPE(ife->ifm_media)) {
                  case IFM_10_2:
                  case IFM_10_5:
                          sc->sc_flags |= TULIPF_LINK_VALID;
                          if (siastat & SIASTAT_ARA) {
                                  TULIP_WRITE(sc, CSR_SIASTAT, SIASTAT_ARA);
                                  sc->sc_flags |= TULIPF_LINK_UP;
                          }
                          break;
  
                  default:
                          /*
                           * If we're SYM media and can detect the link
                           * via the GPIO facility, prefer that status
                           * over LS100.
                           */
                          if (tm->tm_type == TULIP_ROM_MB_21143_SYM &&
                              tm->tm_actmask != 0) {
                                  sc->sc_flags = (sc->sc_flags &
                                      ~TULIPF_LINK_UP) | TULIPF_LINK_VALID;
                                  if (TULIP_ISSET(sc, CSR_SIAGEN,
                                      tm->tm_actmask) == tm->tm_actdata)
                                          sc->sc_flags |= TULIPF_LINK_UP;
                          }
                  }
                  break;
  
          default:
                  /* Nothing. */
                  break;
          }
  }
  
  void
  tlp_sia_get(sc, ifmr)
          struct tulip_softc *sc;
          struct ifmediareq *ifmr;
  {
          struct ifmedia_entry *ife;
  
          ifmr->ifm_status = 0;
  
          tlp_sia_update_link(sc);
  
          ife = TULIP_CURRENT_MEDIA(sc);
  
          if (sc->sc_flags & TULIPF_LINK_VALID)
                  ifmr->ifm_status |= IFM_AVALID;
          if (sc->sc_flags & TULIPF_LINK_UP)
                  ifmr->ifm_status |= IFM_ACTIVE;
          ifmr->ifm_active = ife->ifm_media;
  }
  
  void
  tlp_sia_fixup(sc)
          struct tulip_softc *sc;
  {
          struct ifmedia_entry *ife;
          struct tulip_21x4x_media *tm;
          u_int32_t siaconn, siatxrx, siagen;
  
          switch (sc->sc_chip) {
          case TULIP_CHIP_82C115:
          case TULIP_CHIP_MX98713A:
          case TULIP_CHIP_MX98715:
          case TULIP_CHIP_MX98715A:
          case TULIP_CHIP_MX98715AEC_X:
          case TULIP_CHIP_MX98725:
                  siaconn = PMAC_SIACONN_MASK;
                  siatxrx = PMAC_SIATXRX_MASK;
                  siagen  = PMAC_SIAGEN_MASK;
                  break;
  
          default:
                  /* No fixups required on any other chips. */
                  return;
          }
  
          for (ife = TAILQ_FIRST(&sc->sc_mii.mii_media.ifm_list);
               ife != NULL; ife = TAILQ_NEXT(ife, ifm_list)) {
                  tm = ife->ifm_aux;
                  if (tm == NULL)
                          continue;
  
                  tm->tm_siaconn &= siaconn;
                  tm->tm_siatxrx &= siatxrx;
                  tm->tm_siagen  &= siagen;
          }
  }
  
  int
  tlp_sia_set(sc)
          struct tulip_softc *sc;
  {
  
          return (tlp_sia_media(sc, TULIP_CURRENT_MEDIA(sc)));
  }
  
  int
  tlp_sia_media(sc, ife)
          struct tulip_softc *sc;
          struct ifmedia_entry *ife;
  {
          struct tulip_21x4x_media *tm;
  
          tm = ife->ifm_aux;
  
          /*
           * XXX This appears to be necessary on a bunch of the clone chips.
           */
          delay(20000);
  
          /*
           * Idle the chip.
           */
          tlp_idle(sc, OPMODE_ST|OPMODE_SR);
  
          /*
           * Program the SIA.  It's important to write in this order,
           * resetting the SIA first.
           */
          TULIP_WRITE(sc, CSR_SIACONN, 0);                /* SRL bit clear */
          delay(1000);
  
          TULIP_WRITE(sc, CSR_SIATXRX, tm->tm_siatxrx);
  
          switch (sc->sc_chip) {
          case TULIP_CHIP_21142:
          case TULIP_CHIP_21143:
                  TULIP_WRITE(sc, CSR_SIAGEN, tm->tm_siagen | tm->tm_gpctl);
                  TULIP_WRITE(sc, CSR_SIAGEN, tm->tm_siagen | tm->tm_gpdata);
                  break;
          default:
                  TULIP_WRITE(sc, CSR_SIAGEN, tm->tm_siagen);
          }
  
          TULIP_WRITE(sc, CSR_SIACONN, tm->tm_siaconn);
  
          /*
           * Set the OPMODE bits for this media and write OPMODE.
           * This will resume the transmit and receive processes.
           */
          sc->sc_opmode = (sc->sc_opmode & ~OPMODE_MEDIA_BITS) | tm->tm_opmode;
          TULIP_WRITE(sc, CSR_OPMODE, sc->sc_opmode);
  
          return (0);
  }
  
  /*
   * 21140 GPIO utility functions.
   */
  void    tlp_21140_gpio_update_link __P((struct tulip_softc *));
  
  void
  tlp_21140_gpio_update_link(sc)
          struct tulip_softc *sc;
  {
          struct ifmedia_entry *ife;
          struct tulip_21x4x_media *tm;
  
          ife = TULIP_CURRENT_MEDIA(sc);
          tm = ife->ifm_aux;
  
          sc->sc_flags &= ~(TULIPF_LINK_UP|TULIPF_LINK_VALID);
  
          if (tm->tm_actmask != 0) {
                  sc->sc_flags |= TULIPF_LINK_VALID;
                  if (TULIP_ISSET(sc, CSR_GPP, tm->tm_actmask) ==
                      tm->tm_actdata)
                          sc->sc_flags |= TULIPF_LINK_UP;
          }
  }
  
  void
  tlp_21140_gpio_get(sc, ifmr)
          struct tulip_softc *sc;
          struct ifmediareq *ifmr;
  {
          struct ifmedia_entry *ife;
  
          ifmr->ifm_status = 0;
  
          tlp_21140_gpio_update_link(sc);
  
          ife = TULIP_CURRENT_MEDIA(sc);
  
          if (sc->sc_flags & TULIPF_LINK_VALID)
                  ifmr->ifm_status |= IFM_AVALID;
          if (sc->sc_flags & TULIPF_LINK_UP)
                  ifmr->ifm_status |= IFM_ACTIVE;
          ifmr->ifm_active = ife->ifm_media;
  }
  
  int
  tlp_21140_gpio_set(sc)
          struct tulip_softc *sc;
  {
          struct ifmedia_entry *ife;
          struct tulip_21x4x_media *tm;
  
          ife = TULIP_CURRENT_MEDIA(sc);
          tm = ife->ifm_aux;
  
          /*
           * Idle the chip.
           */
          tlp_idle(sc, OPMODE_ST|OPMODE_SR);
  
          /*
           * Set the GPIO pins for this media, to flip any
           * relays, etc.
           */
          TULIP_WRITE(sc, CSR_GPP, GPP_GPC|sc->sc_gp_dir);
          delay(10);
          TULIP_WRITE(sc, CSR_GPP, tm->tm_gpdata);
  
          /*
           * Set the OPMODE bits for this media and write OPMODE.
           * This will resume the transmit and receive processes.
           */
          sc->sc_opmode = (sc->sc_opmode & ~OPMODE_MEDIA_BITS) | tm->tm_opmode;
          TULIP_WRITE(sc, CSR_OPMODE, sc->sc_opmode);
  
          return (0);
  }
  
  /*
   * 21040 and 21041 media switches.
   */
  void    tlp_21040_tmsw_init __P((struct tulip_softc *));
  void    tlp_21040_tp_tmsw_init __P((struct tulip_softc *));
  void    tlp_21040_auibnc_tmsw_init __P((struct tulip_softc *));
  void    tlp_21041_tmsw_init __P((struct tulip_softc *));
  
  const struct tulip_mediasw tlp_21040_mediasw = {
          tlp_21040_tmsw_init, tlp_sia_get, tlp_sia_set
  };
  
  const struct tulip_mediasw tlp_21040_tp_mediasw = {
          tlp_21040_tp_tmsw_init, tlp_sia_get, tlp_sia_set
  };
  
  const struct tulip_mediasw tlp_21040_auibnc_mediasw = {
          tlp_21040_auibnc_tmsw_init, tlp_sia_get, tlp_sia_set
  };
  
  const struct tulip_mediasw tlp_21041_mediasw = {
          tlp_21041_tmsw_init, tlp_sia_get, tlp_sia_set
  };
  
  
  void
  tlp_21040_tmsw_init(sc)
          struct tulip_softc *sc;
  {
          static const u_int8_t media[] = {
                  TULIP_ROM_MB_MEDIA_TP,
                  TULIP_ROM_MB_MEDIA_TP_FDX,
                  TULIP_ROM_MB_MEDIA_AUI,
          };
          struct tulip_21x4x_media *tm;
  
          ifmedia_init(&sc->sc_mii.mii_media, 0, tlp_mediachange,
              tlp_mediastatus);
  
          tlp_add_srom_media(sc, 0, NULL, NULL, media, 3);
  
          /*
           * No SROM type for External SIA.
           */
          tm = malloc(sizeof(*tm), M_DEVBUF, M_WAITOK|M_ZERO);
          tm->tm_name = "manual";
          tm->tm_opmode = 0;
          tm->tm_siaconn = SIACONN_21040_EXTSIA;
          tm->tm_siatxrx = SIATXRX_21040_EXTSIA;
          tm->tm_siagen  = SIAGEN_21040_EXTSIA;
          ifmedia_add(&sc->sc_mii.mii_media,
              IFM_MAKEWORD(IFM_ETHER, IFM_MANUAL, 0, sc->sc_tlp_minst), 0, tm);
  
          /*
           * XXX Autosense not yet supported.
           */
  
          /* XXX This should be auto-sense. */
          ifmedia_set(&sc->sc_mii.mii_media, IFM_ETHER|IFM_10_T);
  
          tlp_print_media(sc);
  }
  
  void
  tlp_21040_tp_tmsw_init(sc)
          struct tulip_softc *sc;
  {
          static const u_int8_t media[] = {
                  TULIP_ROM_MB_MEDIA_TP,
                  TULIP_ROM_MB_MEDIA_TP_FDX,
          };
  
          ifmedia_init(&sc->sc_mii.mii_media, 0, tlp_mediachange,
              tlp_mediastatus);
  
          tlp_add_srom_media(sc, 0, NULL, NULL, media, 2);
  
          ifmedia_set(&sc->sc_mii.mii_media, IFM_ETHER|IFM_10_T);
  
          tlp_print_media(sc);
  }
  
  void
  tlp_21040_auibnc_tmsw_init(sc)
          struct tulip_softc *sc;
  {
          static const u_int8_t media[] = {
                  TULIP_ROM_MB_MEDIA_AUI,
          };
  
          ifmedia_init(&sc->sc_mii.mii_media, 0, tlp_mediachange,
              tlp_mediastatus);
  
          tlp_add_srom_media(sc, 0, NULL, NULL, media, 1);
  
          ifmedia_set(&sc->sc_mii.mii_media, IFM_ETHER|IFM_10_5);
  
          tlp_print_media(sc);
  }
  
  void
  tlp_21041_tmsw_init(sc)
          struct tulip_softc *sc;
  {
          static const u_int8_t media[] = {
                  TULIP_ROM_MB_MEDIA_TP,
                  TULIP_ROM_MB_MEDIA_TP_FDX,
                  TULIP_ROM_MB_MEDIA_BNC,
                  TULIP_ROM_MB_MEDIA_AUI,
          };
          int i, defmedia, devcnt, leaf_offset, mb_offset, m_cnt;
          const struct tulip_srom_to_ifmedia *tsti;
          struct tulip_21x4x_media *tm;
          u_int16_t romdef;
          u_int8_t mb;
  
          ifmedia_init(&sc->sc_mii.mii_media, 0, tlp_mediachange,
              tlp_mediastatus);
  
          if (tlp_isv_srom(sc->sc_srom) == 0) {
   not_isv_srom:
                  /*
                   * If we have a board without the standard 21041 SROM format,
                   * we just assume all media are present and try and pick a
                   * reasonable default.
                   */
                  tlp_add_srom_media(sc, 0, NULL, NULL, media, 4);
  
                  /*
                   * XXX Autosense not yet supported.
                   */
  
                  /* XXX This should be auto-sense. */
                  ifmedia_set(&sc->sc_mii.mii_media, IFM_ETHER|IFM_10_T);
  
                  tlp_print_media(sc);
                  return;
          }
  
          devcnt = sc->sc_srom[TULIP_ROM_CHIP_COUNT];
          for (i = 0; i < devcnt; i++) {
                  if (sc->sc_srom[TULIP_ROM_CHIP_COUNT] == 1)
                          break;
                  if (sc->sc_srom[TULIP_ROM_CHIPn_DEVICE_NUMBER(i)] ==
                      sc->sc_devno)
                          break;
          }
  
          if (i == devcnt)
                  goto not_isv_srom;
  
          leaf_offset = TULIP_ROM_GETW(sc->sc_srom,
              TULIP_ROM_CHIPn_INFO_LEAF_OFFSET(i));
          mb_offset = leaf_offset + TULIP_ROM_IL_MEDIAn_BLOCK_BASE;
          m_cnt = sc->sc_srom[leaf_offset + TULIP_ROM_IL_MEDIA_COUNT];
  
          for (; m_cnt != 0;
               m_cnt--, mb_offset += TULIP_ROM_MB_SIZE(mb)) {
                  mb = sc->sc_srom[mb_offset];
                  tm = malloc(sizeof(*tm), M_DEVBUF, M_WAITOK|M_ZERO);
                  switch (mb & TULIP_ROM_MB_MEDIA_CODE) {
                  case TULIP_ROM_MB_MEDIA_TP_FDX:
                  case TULIP_ROM_MB_MEDIA_TP:
                  case TULIP_ROM_MB_MEDIA_BNC:
                  case TULIP_ROM_MB_MEDIA_AUI:
                          tsti = tlp_srom_to_ifmedia(mb &
                              TULIP_ROM_MB_MEDIA_CODE);
  
                          tlp_srom_media_info(sc, tsti, tm);
  
                          /*
                           * Override our default SIA settings if the
                           * SROM contains its own.
                           */
                          if (mb & TULIP_ROM_MB_EXT) {
                                  tm->tm_siaconn = TULIP_ROM_GETW(sc->sc_srom,
                                      mb_offset + TULIP_ROM_MB_CSR13);
                                  tm->tm_siatxrx = TULIP_ROM_GETW(sc->sc_srom,
                                      mb_offset + TULIP_ROM_MB_CSR14);
                                  tm->tm_siagen = TULIP_ROM_GETW(sc->sc_srom,
                                      mb_offset + TULIP_ROM_MB_CSR15);
                          }
  
                          ifmedia_add(&sc->sc_mii.mii_media,
                              IFM_MAKEWORD(IFM_ETHER, tsti->tsti_subtype,
                              tsti->tsti_options, sc->sc_tlp_minst), 0, tm);
                          break;
  
                  default:
                          printf("%s: unknown media code 0x%02x\n",
                              sc->sc_dev.dv_xname,
                              mb & TULIP_ROM_MB_MEDIA_CODE);
                          free(tm, M_DEVBUF);
                  }
          }
  
          /*
           * XXX Autosense not yet supported.
           */
  
          romdef = TULIP_ROM_GETW(sc->sc_srom, leaf_offset +
              TULIP_ROM_IL_SELECT_CONN_TYPE);
          switch (romdef) {
          case SELECT_CONN_TYPE_TP:
          case SELECT_CONN_TYPE_TP_AUTONEG:
          case SELECT_CONN_TYPE_TP_NOLINKPASS:
                  defmedia = IFM_ETHER|IFM_10_T;
                  break;
  
          case SELECT_CONN_TYPE_TP_FDX:
                  defmedia = IFM_ETHER|IFM_10_T|IFM_FDX;
                  break;
  
          case SELECT_CONN_TYPE_BNC:
                  defmedia = IFM_ETHER|IFM_10_2;
                  break;
  
          case SELECT_CONN_TYPE_AUI:
                  defmedia = IFM_ETHER|IFM_10_5;
                  break;
  #if 0 /* XXX */
          case SELECT_CONN_TYPE_ASENSE:
          case SELECT_CONN_TYPE_ASENSE_AUTONEG:
                  defmedia = IFM_ETHER|IFM_AUTO;
                  break;
  #endif
          default:
                  defmedia = 0;
          }
  
          if (defmedia == 0) {
                  /*
                   * XXX We should default to auto-sense.
                   */
                  defmedia = IFM_ETHER|IFM_10_T;
          }
  
          ifmedia_set(&sc->sc_mii.mii_media, defmedia);
  
          tlp_print_media(sc);
  }
  
  /*
   * DECchip 2114x ISV media switch.
   */
  void    tlp_2114x_isv_tmsw_init __P((struct tulip_softc *));
  void    tlp_2114x_isv_tmsw_get __P((struct tulip_softc *, struct ifmediareq *));
  int     tlp_2114x_isv_tmsw_set __P((struct tulip_softc *));
  
  const struct tulip_mediasw tlp_2114x_isv_mediasw = {
          tlp_2114x_isv_tmsw_init, tlp_2114x_isv_tmsw_get, tlp_2114x_isv_tmsw_set
  };
  
  void    tlp_2114x_nway_get __P((struct tulip_softc *, struct ifmediareq *));
  int     tlp_2114x_nway_set __P((struct tulip_softc *));
  
  void    tlp_2114x_nway_statchg __P((struct device *));
  int     tlp_2114x_nway_service __P((struct tulip_softc *, int));
  void    tlp_2114x_nway_auto __P((struct tulip_softc *));
  void    tlp_2114x_nway_status __P((struct tulip_softc *));
  
  void
  tlp_2114x_isv_tmsw_init(sc)
          struct tulip_softc *sc;
  {
          struct ifnet *ifp = &sc->sc_ethercom.ec_if;
          struct ifmedia_entry *ife;
          struct mii_softc *phy;
          struct tulip_21x4x_media *tm;
          const struct tulip_srom_to_ifmedia *tsti;
          int i, devcnt, leaf_offset, m_cnt, type, length;
          int defmedia, miidef;
          u_int16_t word;
          u_int8_t *cp, *ncp;
  
          defmedia = miidef = 0;
  
          sc->sc_mii.mii_ifp = ifp;
          sc->sc_mii.mii_readreg = tlp_bitbang_mii_readreg;
          sc->sc_mii.mii_writereg = tlp_bitbang_mii_writereg;
          sc->sc_mii.mii_statchg = sc->sc_statchg;
  
          /*
           * Ignore `instance'; we may get a mixture of SIA and MII
           * media, and `instance' is used to isolate or select the
           * PHY on the MII as appropriate.  Note that duplicate media
           * are disallowed, so ignoring `instance' is safe.
           */
          ifmedia_init(&sc->sc_mii.mii_media, IFM_IMASK, tlp_mediachange,
              tlp_mediastatus);
  
          devcnt = sc->sc_srom[TULIP_ROM_CHIP_COUNT];
          for (i = 0; i < devcnt; i++) {
                  if (sc->sc_srom[TULIP_ROM_CHIP_COUNT] == 1)
                          break;
                  if (sc->sc_srom[TULIP_ROM_CHIPn_DEVICE_NUMBER(i)] ==
                      sc->sc_devno)
                          break;
          }
  
          if (i == devcnt) {
                  printf("%s: unable to locate info leaf in SROM\n",
                      sc->sc_dev.dv_xname);
                  return;
          }
  
          leaf_offset = TULIP_ROM_GETW(sc->sc_srom,
              TULIP_ROM_CHIPn_INFO_LEAF_OFFSET(i));
  
          /* XXX SELECT CONN TYPE */
  
          cp = &sc->sc_srom[leaf_offset + TULIP_ROM_IL_MEDIA_COUNT];
  
          /*
           * On some chips, the first thing in the Info Leaf is the
           * GPIO pin direction data.
           */
          switch (sc->sc_chip) {
          case TULIP_CHIP_21140:
          case TULIP_CHIP_21140A:
          case TULIP_CHIP_MX98713:
          case TULIP_CHIP_AX88140:
          case TULIP_CHIP_AX88141:
                  sc->sc_gp_dir = *cp++;
                  break;
  
          default:
                  /* Nothing. */
                  break;
          }
  
          /* Get the media count. */
          m_cnt = *cp++;
  
          for (; m_cnt != 0; cp = ncp, m_cnt--) {
                  /*
                   * Determine the type and length of this media block.
                   * The 21143 is spec'd to always use extended format blocks,
                   * but some cards don't set the bit to indicate this.
                   * Hopefully there are no cards which really don't use
                   * extended format blocks.
                   */
                  if ((*cp & 0x80) == 0 && sc->sc_chip != TULIP_CHIP_21143) {
                          length = 4;
                          type = TULIP_ROM_MB_21140_GPR;
                  } else {
                          length = (*cp++ & 0x7f) - 1;
                          type = *cp++ & 0x3f;
                  }
  
                  /* Compute the start of the next block. */
                  ncp = cp + length;
  
                  /* Now, parse the block. */
                  switch (type) {
                  case TULIP_ROM_MB_21140_GPR:
                          tlp_get_minst(sc);
                          sc->sc_media_seen |= 1 << TULIP_ROM_MB_21140_GPR;
  
                          tm = malloc(sizeof(*tm), M_DEVBUF, M_WAITOK|M_ZERO);
  
                          tm->tm_type = TULIP_ROM_MB_21140_GPR;
                          tm->tm_get = tlp_21140_gpio_get;
                          tm->tm_set = tlp_21140_gpio_set;
  
                          /* First is the media type code. */
                          tsti = tlp_srom_to_ifmedia(cp[0] &
                              TULIP_ROM_MB_MEDIA_CODE);
                          if (tsti == NULL) {
                                  /* Invalid media code. */
                                  free(tm, M_DEVBUF);
                                  break;
                          }
                          
                          /* Get defaults. */
                          tlp_srom_media_info(sc, tsti, tm);
  
                          /* Next is any GPIO info for this media. */
                          tm->tm_gpdata = cp[1];
  
                          /*
                           * Next is a word containing OPMODE information
                           * and info on how to detect if this media is
                           * active.
                           */
                          word = TULIP_ROM_GETW(cp, 2);
                          tm->tm_opmode &= OPMODE_FD;
                          tm->tm_opmode |= TULIP_ROM_MB_OPMODE(word);
                          if ((word & TULIP_ROM_MB_NOINDICATOR) == 0) {
                                  tm->tm_actmask =
                                      TULIP_ROM_MB_BITPOS(word);
                                  tm->tm_actdata =
                                      (word & TULIP_ROM_MB_POLARITY) ?
                                      0 : tm->tm_actmask;
                          }
  
                          ifmedia_add(&sc->sc_mii.mii_media,
                              IFM_MAKEWORD(IFM_ETHER, tsti->tsti_subtype,
                              tsti->tsti_options, sc->sc_tlp_minst), 0, tm);
                          break;
  
                  case TULIP_ROM_MB_21140_MII:
                          sc->sc_media_seen |= 1 << TULIP_ROM_MB_21140_MII;
  
                          tm = malloc(sizeof(*tm), M_DEVBUF, M_WAITOK|M_ZERO);
  
                          tm->tm_type = TULIP_ROM_MB_21140_MII;
                          tm->tm_get = tlp_mii_getmedia;
                          tm->tm_set = tlp_mii_setmedia;
                          tm->tm_opmode = OPMODE_PS;
  
                          if (sc->sc_reset == NULL)
                                  sc->sc_reset = tlp_21140_reset;
  
                          /* First is the PHY number. */
                          tm->tm_phyno = *cp++;
  
                          /* Next is the MII select sequence length and offset. */
                          tm->tm_gp_length = *cp++;
                          tm->tm_gp_offset = cp - &sc->sc_srom[0];
                          cp += tm->tm_gp_length;
  
                          /* Next is the MII reset sequence length and offset. */
                          tm->tm_reset_length = *cp++;
                          tm->tm_reset_offset = cp - &sc->sc_srom[0];
                          cp += tm->tm_reset_length;
  
                          /*
                           * The following items are left in the media block
                           * that we don't particularly care about:
                           *
                           *      capabilities            W
                           *      advertisement           W
                           *      full duplex             W
                           *      tx threshold            W
                           *
                           * These appear to be bits in the PHY registers,
                           * which our MII code handles on its own.
                           */
  
                          /*
                           * Before we probe the MII bus, we need to reset
                           * it and issue the selection sequence.
                           */
  
                          /* Set the direction of the pins... */
                          TULIP_WRITE(sc, CSR_GPP, GPP_GPC|sc->sc_gp_dir);
  
                          for (i = 0; i < tm->tm_reset_length; i++) {
                                  delay(10);
                                  TULIP_WRITE(sc, CSR_GPP,
                                      sc->sc_srom[tm->tm_reset_offset + i]);
                          }
  
                          for (i = 0; i < tm->tm_gp_length; i++) {
                                  delay(10);
                                  TULIP_WRITE(sc, CSR_GPP,
                                      sc->sc_srom[tm->tm_gp_offset + i]);
                          }
  
                          /* If there were no sequences, just lower the pins. */
                          if (tm->tm_reset_length == 0 && tm->tm_gp_length == 0) {
                                  delay(10);
                                  TULIP_WRITE(sc, CSR_GPP, 0);
                          }
  
                          /*
                           * Now, probe the MII for the PHY.  Note, we know
                           * the location of the PHY on the bus, but we don't
                           * particularly care; the MII code just likes to
                           * search the whole thing anyhow.
                           */
                          mii_attach(&sc->sc_dev, &sc->sc_mii, 0xffffffff,
                              MII_PHY_ANY, tm->tm_phyno, 0);
  
                          /*
                           * Now, search for the PHY we hopefully just
                           * configured.  If it's not configured into the
                           * kernel, we lose.  The PHY's default media always
                           * takes priority.
                           */
                          for (phy = LIST_FIRST(&sc->sc_mii.mii_phys);
                               phy != NULL;
                               phy = LIST_NEXT(phy, mii_list))
                                  if (phy->mii_offset == tm->tm_phyno)
                                          break;
                          if (phy == NULL) {
                                  printf("%s: unable to configure MII\n",
                                      sc->sc_dev.dv_xname);
                                  break;
                          }
  
                          sc->sc_flags |= TULIPF_HAS_MII;
                          sc->sc_tick = tlp_mii_tick;
                          miidef = IFM_MAKEWORD(IFM_ETHER, IFM_AUTO, 0,
                              phy->mii_inst);
  
                          /*
                           * Okay, now that we've found the PHY and the MII
                           * layer has added all of the media associated
                           * with that PHY, we need to traverse the media
                           * list, and add our `tm' to each entry's `aux'
                           * pointer.
                           *
                           * We do this by looking for media with our
                           * PHY's `instance'.
                           */
                          for (ife = TAILQ_FIRST(&sc->sc_mii.mii_media.ifm_list);
                               ife != NULL;
                               ife = TAILQ_NEXT(ife, ifm_list)) {
                                  if (IFM_INST(ife->ifm_media) != phy->mii_inst)
                                          continue;
                                  ife->ifm_aux = tm;
                          }
                          break;
  
                  case TULIP_ROM_MB_21142_SIA:
                          tlp_get_minst(sc);
                          sc->sc_media_seen |= 1 << TULIP_ROM_MB_21142_SIA;
  
                          tm = malloc(sizeof(*tm), M_DEVBUF, M_WAITOK|M_ZERO);
  
                          tm->tm_type = TULIP_ROM_MB_21142_SIA;
                          tm->tm_get = tlp_sia_get;
                          tm->tm_set = tlp_sia_set;
  
                          /* First is the media type code. */
                          tsti = tlp_srom_to_ifmedia(cp[0] &
                              TULIP_ROM_MB_MEDIA_CODE);
                          if (tsti == NULL) {
                                  /* Invalid media code. */
                                  free(tm, M_DEVBUF);
                                  break;
                          }
  
                          /* Get defaults. */
                          tlp_srom_media_info(sc, tsti, tm);
  
                          /*
                           * Override our default SIA settings if the
                           * SROM contains its own.
                           */
                          if (cp[0] & 0x40) {
                                  tm->tm_siaconn = TULIP_ROM_GETW(cp, 1);
                                  tm->tm_siatxrx = TULIP_ROM_GETW(cp, 3);
                                  tm->tm_siagen  = TULIP_ROM_GETW(cp, 5);
                                  cp += 7;
                          } else
                                  cp++;
  
                          /* Next is GPIO control/data. */
                          tm->tm_gpctl  = TULIP_ROM_GETW(cp, 0) << 16;
                          tm->tm_gpdata = TULIP_ROM_GETW(cp, 2) << 16;
  
                          ifmedia_add(&sc->sc_mii.mii_media,
                              IFM_MAKEWORD(IFM_ETHER, tsti->tsti_subtype,
                              tsti->tsti_options, sc->sc_tlp_minst), 0, tm);
                          break;
  
                  case TULIP_ROM_MB_21142_MII:
                          sc->sc_media_seen |= 1 << TULIP_ROM_MB_21142_MII;
  
                          tm = malloc(sizeof(*tm), M_DEVBUF, M_WAITOK|M_ZERO);
  
                          tm->tm_type = TULIP_ROM_MB_21142_MII;
                          tm->tm_get = tlp_mii_getmedia;
                          tm->tm_set = tlp_mii_setmedia;
                          tm->tm_opmode = OPMODE_PS;
  
                          if (sc->sc_reset == NULL)
                                  sc->sc_reset = tlp_21142_reset;
  
                          /* First is the PHY number. */
                          tm->tm_phyno = *cp++;
  
                          /* Next is the MII select sequence length and offset. */
                          tm->tm_gp_length = *cp++;
                          tm->tm_gp_offset = cp - &sc->sc_srom[0];
                          cp += tm->tm_gp_length * 2;
  
                          /* Next is the MII reset sequence length and offset. */
                          tm->tm_reset_length = *cp++;
                          tm->tm_reset_offset = cp - &sc->sc_srom[0];
                          cp += tm->tm_reset_length * 2;
  
                          /*
                           * The following items are left in the media block
                           * that we don't particularly care about:
                           *
                           *      capabilities            W
                           *      advertisement           W
                           *      full duplex             W
                           *      tx threshold            W
                           *      MII interrupt           W
                           *
                           * These appear to be bits in the PHY registers,
                           * which our MII code handles on its own.
                           */
  
                          /*
                           * Before we probe the MII bus, we need to reset
                           * it and issue the selection sequence.
                           */
  
                          cp = &sc->sc_srom[tm->tm_reset_offset];
                          for (i = 0; i < tm->tm_reset_length; i++, cp += 2) {
                                  delay(10);
                                  TULIP_WRITE(sc, CSR_SIAGEN,
                                      TULIP_ROM_GETW(cp, 0) << 16);
                          }
  
                          cp = &sc->sc_srom[tm->tm_gp_offset];
                          for (i = 0; i < tm->tm_gp_length; i++, cp += 2) {
                                  delay(10);
                                  TULIP_WRITE(sc, CSR_SIAGEN,
                                      TULIP_ROM_GETW(cp, 0) << 16);
                          }
  
                          /* If there were no sequences, just lower the pins. */
                          if (tm->tm_reset_length == 0 && tm->tm_gp_length == 0) {
                                  delay(10);
                                  TULIP_WRITE(sc, CSR_SIAGEN, 0);
                          }
  
                          /*
                           * Now, probe the MII for the PHY.  Note, we know
                           * the location of the PHY on the bus, but we don't
                           * particularly care; the MII code just likes to
                           * search the whole thing anyhow.
                           */
                          mii_attach(&sc->sc_dev, &sc->sc_mii, 0xffffffff,
                              MII_PHY_ANY, tm->tm_phyno, 0);
  
                          /*
                           * Now, search for the PHY we hopefully just
                           * configured.  If it's not configured into the
                           * kernel, we lose.  The PHY's default media always
                           * takes priority.
                           */
                          for (phy = LIST_FIRST(&sc->sc_mii.mii_phys);
                               phy != NULL;
                               phy = LIST_NEXT(phy, mii_list))
                                  if (phy->mii_offset == tm->tm_phyno)
                                          break;
                          if (phy == NULL) {
                                  printf("%s: unable to configure MII\n",
                                      sc->sc_dev.dv_xname);
                                  break;
                          }
  
                          sc->sc_flags |= TULIPF_HAS_MII;
                          sc->sc_tick = tlp_mii_tick;
                          miidef = IFM_MAKEWORD(IFM_ETHER, IFM_AUTO, 0,
                              phy->mii_inst);
  
                          /*
                           * Okay, now that we've found the PHY and the MII
                           * layer has added all of the media associated
                           * with that PHY, we need to traverse the media
                           * list, and add our `tm' to each entry's `aux'
                           * pointer.
                           *
                           * We do this by looking for media with our
                           * PHY's `instance'.
                           */
                          for (ife = TAILQ_FIRST(&sc->sc_mii.mii_media.ifm_list);
                               ife != NULL;
                               ife = TAILQ_NEXT(ife, ifm_list)) {
                                  if (IFM_INST(ife->ifm_media) != phy->mii_inst)
                                          continue;
                                  ife->ifm_aux = tm;
                          }
                          break;
  
                  case TULIP_ROM_MB_21143_SYM:
                          tlp_get_minst(sc);
                          sc->sc_media_seen |= 1 << TULIP_ROM_MB_21143_SYM;
  
                          tm = malloc(sizeof(*tm), M_DEVBUF, M_WAITOK|M_ZERO);
  
                          tm->tm_type = TULIP_ROM_MB_21143_SYM;
                          tm->tm_get = tlp_sia_get;
                          tm->tm_set = tlp_sia_set;
  
                          /* First is the media type code. */
                          tsti = tlp_srom_to_ifmedia(cp[0] &
                              TULIP_ROM_MB_MEDIA_CODE);
                          if (tsti == NULL) {
                                  /* Invalid media code. */
                                  free(tm, M_DEVBUF);
                                  break;
                          }
  
                          /* Get defaults. */
                          tlp_srom_media_info(sc, tsti, tm);
  
                          /* Next is GPIO control/data. */
                          tm->tm_gpctl  = TULIP_ROM_GETW(cp, 1) << 16;
                          tm->tm_gpdata = TULIP_ROM_GETW(cp, 3) << 16;
  
                          /*
                           * Next is a word containing OPMODE information
                           * and info on how to detect if this media is
                           * active.
                           */
                          word = TULIP_ROM_GETW(cp, 5);
                          tm->tm_opmode &= OPMODE_FD;
                          tm->tm_opmode |= TULIP_ROM_MB_OPMODE(word);
                          if ((word & TULIP_ROM_MB_NOINDICATOR) == 0) {
                                  tm->tm_actmask =
                                      TULIP_ROM_MB_BITPOS(word);
                                  tm->tm_actdata =
                                      (word & TULIP_ROM_MB_POLARITY) ?
                                      0 : tm->tm_actmask;
                          }
  
                          ifmedia_add(&sc->sc_mii.mii_media,
                              IFM_MAKEWORD(IFM_ETHER, tsti->tsti_subtype,
                              tsti->tsti_options, sc->sc_tlp_minst), 0, tm);
                          break;
  
                  case TULIP_ROM_MB_21143_RESET:
                          printf("%s: 21143 reset block\n", sc->sc_dev.dv_xname);
                          break;
  
                  default:
                          printf("%s: unknown ISV media block type 0x%02x\n",
                              sc->sc_dev.dv_xname, type);
                  }
          }
  
          /*
           * Deal with the case where no media is configured.
           */
          if (TAILQ_FIRST(&sc->sc_mii.mii_media.ifm_list) == NULL) {
                  printf("%s: no media found!\n", sc->sc_dev.dv_xname);
                  ifmedia_add(&sc->sc_mii.mii_media, IFM_ETHER|IFM_NONE, 0, NULL);
                  ifmedia_set(&sc->sc_mii.mii_media, IFM_ETHER|IFM_NONE);
                  return;
          }
  
          /*
           * Pick the default media.
           */
          if (miidef != 0)
                  defmedia = miidef;
          else {
                  switch (sc->sc_chip) {
                  case TULIP_CHIP_21140:
                  case TULIP_CHIP_21140A:
                          /* XXX should come from SROM */
                          defmedia = IFM_MAKEWORD(IFM_ETHER, IFM_10_T, 0, 0);
                          if (ifmedia_match(&sc->sc_mii.mii_media, defmedia,
                                  sc->sc_mii.mii_media.ifm_mask) == NULL) {
                                  /*
                                   * There is not a 10baseT media.
                                   * Fall back to the first found one.
                                   */
                                  ife = TAILQ_FIRST(&sc->sc_mii.mii_media.ifm_list);
                                  defmedia = ife->ifm_media;
                          }
                          break;
  
                  case TULIP_CHIP_21142:
                  case TULIP_CHIP_21143:
                  case TULIP_CHIP_MX98713A:
                  case TULIP_CHIP_MX98715:
                  case TULIP_CHIP_MX98715A:
                  case TULIP_CHIP_MX98715AEC_X:
                  case TULIP_CHIP_MX98725:
                          tm = malloc(sizeof(*tm), M_DEVBUF, M_WAITOK|M_ZERO);
                          tm->tm_name = "auto";
                          tm->tm_get = tlp_2114x_nway_get;
                          tm->tm_set = tlp_2114x_nway_set;
  
                          defmedia = IFM_MAKEWORD(IFM_ETHER, IFM_AUTO, 0, 0);
                          ifmedia_add(&sc->sc_mii.mii_media, defmedia, 0, tm);
  
                          sc->sc_statchg = tlp_2114x_nway_statchg;
                          sc->sc_tick = tlp_2114x_nway_tick;
                          break;
  
                  default:
                          defmedia = IFM_MAKEWORD(IFM_ETHER, IFM_10_T, 0, 0);
                          break;
                  }
          }
  
          ifmedia_set(&sc->sc_mii.mii_media, defmedia);
  
          /*
           * Display any non-MII media we've located.
           */
          if (sc->sc_media_seen &
              ~((1 << TULIP_ROM_MB_21140_MII) | (1 << TULIP_ROM_MB_21142_MII)))
                  tlp_print_media(sc);
  
          tlp_sia_fixup(sc);
  }
  
  void
  tlp_2114x_nway_get(sc, ifmr)
          struct tulip_softc *sc;
          struct ifmediareq *ifmr;
  {
  
          (void) tlp_2114x_nway_service(sc, MII_POLLSTAT);
          ifmr->ifm_status = sc->sc_mii.mii_media_status;
          ifmr->ifm_active = sc->sc_mii.mii_media_active; 
  }
  
  int
  tlp_2114x_nway_set(sc)
          struct tulip_softc *sc;
  {
  
          return (tlp_2114x_nway_service(sc, MII_MEDIACHG));
  }
  
  void
  tlp_2114x_nway_statchg(self)
          struct device *self;
  {
          struct tulip_softc *sc = (struct tulip_softc *)self;
          struct mii_data *mii = &sc->sc_mii;
          struct ifmedia_entry *ife;
  
          if (IFM_SUBTYPE(mii->mii_media_active) == IFM_NONE)
                  return;
          
          if ((ife = ifmedia_match(&mii->mii_media, mii->mii_media_active, 
              mii->mii_media.ifm_mask)) == NULL) {
                  printf("tlp_2114x_nway_statchg: no match for media 0x%x/0x%x\n",
                      mii->mii_media_active, ~mii->mii_media.ifm_mask);
                  panic("tlp_2114x_nway_statchg");
          }
  
          tlp_sia_media(sc, ife);
  }
  
  void
  tlp_2114x_nway_tick(arg)
          void *arg;
  {
          struct tulip_softc *sc = arg;
          struct mii_data *mii = &sc->sc_mii;
          int s, ticks;
  
          if ((sc->sc_dev.dv_flags & DVF_ACTIVE) == 0)
                  return;
  
          s = splnet();
          tlp_2114x_nway_service(sc, MII_TICK);
          if ((sc->sc_flags & TULIPF_LINK_UP) == 0 &&
              (mii->mii_media_status & IFM_ACTIVE) != 0 &&
              IFM_SUBTYPE(mii->mii_media_active) != IFM_NONE) {
                  sc->sc_flags |= TULIPF_LINK_UP;
                  tlp_start(&sc->sc_ethercom.ec_if);
          } else if ((sc->sc_flags & TULIPF_LINK_UP) != 0 &&
              (mii->mii_media_status & IFM_ACTIVE) == 0) {
                  sc->sc_flags &= ~TULIPF_LINK_UP;
          }
          splx(s);
  
          if ((sc->sc_flags & TULIPF_LINK_UP) == 0)
                  ticks = hz >> 3;
          else
                  ticks = hz;
          callout_reset(&sc->sc_tick_callout, ticks, tlp_2114x_nway_tick, sc);
  }
  
  /*
   * Support for the 2114X internal NWay block.  This is constructed
   * somewhat like a PHY driver for simplicity.
   */
  
  int
  tlp_2114x_nway_service(sc, cmd)
          struct tulip_softc *sc;
          int cmd;
  {
          struct mii_data *mii = &sc->sc_mii;
          struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
  
          if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
                  return (0);
  
          switch (cmd) {
          case MII_POLLSTAT:
                  /* Nothing special to do here. */
                  break;
  
          case MII_MEDIACHG:
                  switch (IFM_SUBTYPE(ife->ifm_media)) {
                  case IFM_AUTO:
                          goto restart;
                  default:
                          /* Manual setting doesn't go through here. */
                          printf("tlp_2114x_nway_service: oops!\n");
                          return (EINVAL);
                  }
                  break;
  
          case MII_TICK:
                  /*
                   * Only used for autonegotiation.
                   */
                  if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO)
                          break;
  
                  /*
                   * Check to see if we have link.  If we do, we don't
                   * need to restart the autonegotiation process.
                   */
  #if 0
                  if (mii->mii_media_status & IFM_ACTIVE)
  #else
                  if (sc->sc_flags & TULIPF_LINK_UP)
  #endif
                          break;
  
                  /*
                   * Only retry autonegotiation every 5 seconds.
                   */
                  if (++sc->sc_nway_ticks != (5 << 3))
                          break;
  
          restart:
                  sc->sc_nway_ticks = 0;
                  ife->ifm_data = IFM_NONE;
                  tlp_2114x_nway_auto(sc);
                  break;
          }
  
          /* Update the media status. */
          tlp_2114x_nway_status(sc);
  
          /*
           * Callback if something changed.  Manually configuration goes through
           * tlp_sia_set() anyway, so ignore that here.
           */
          if (IFM_SUBTYPE(ife->ifm_media) == IFM_AUTO &&
              ife->ifm_data != mii->mii_media_active) {
                  (*sc->sc_statchg)(&sc->sc_dev);
                  ife->ifm_data = mii->mii_media_active;
          }
          return (0);
  }
  
  void
  tlp_2114x_nway_auto(sc)
          struct tulip_softc *sc;
  {
          uint32_t siastat, siatxrx;
  
          tlp_idle(sc, OPMODE_ST|OPMODE_SR);
  
          sc->sc_opmode &= ~(OPMODE_PS|OPMODE_PCS|OPMODE_SCR|OPMODE_FD);
          sc->sc_opmode |= OPMODE_TTM|OPMODE_HBD;
          siatxrx = 0xffbf;               /* XXX magic number */
  
          /* Compute the link code word to advertise. */
          if (sc->sc_sia_cap & BMSR_100T4)
                  siatxrx |= SIATXRX_T4;
          if (sc->sc_sia_cap & BMSR_100TXFDX)
                  siatxrx |= SIATXRX_TXF;
          if (sc->sc_sia_cap & BMSR_100TXHDX)
                  siatxrx |= SIATXRX_THX;
          if (sc->sc_sia_cap & BMSR_10TFDX)
                  sc->sc_opmode |= OPMODE_FD;
          if (sc->sc_sia_cap & BMSR_10THDX)
                  siatxrx |= SIATXRX_TH;
  
          TULIP_WRITE(sc, CSR_OPMODE, sc->sc_opmode);
  
          TULIP_WRITE(sc, CSR_SIACONN, 0);
          delay(1000);
          TULIP_WRITE(sc, CSR_SIATXRX, siatxrx);
          TULIP_WRITE(sc, CSR_SIACONN, SIACONN_SRL);
  
          siastat = TULIP_READ(sc, CSR_SIASTAT);
          siastat &= ~(SIASTAT_ANS|SIASTAT_LPC|SIASTAT_TRA|SIASTAT_ARA|
                       SIASTAT_LS100|SIASTAT_LS10|SIASTAT_MRA);
          siastat |= SIASTAT_ANS_TXDIS;
          TULIP_WRITE(sc, CSR_SIASTAT, siastat);
  }
  
  void
  tlp_2114x_nway_status(sc)
          struct tulip_softc *sc;
  {
          struct mii_data *mii = &sc->sc_mii;
          uint32_t siatxrx, siastat, anlpar;
  
          mii->mii_media_status = IFM_AVALID;
          mii->mii_media_active = IFM_ETHER;
  
          if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
                  return;
  
          siastat = TULIP_READ(sc, CSR_SIASTAT);
          siatxrx = TULIP_READ(sc, CSR_SIATXRX);
  
          if (siatxrx & SIATXRX_ANE) {
                  if ((siastat & SIASTAT_ANS) != SIASTAT_ANS_FLPGOOD) {
                          /* Erg, still trying, I guess... */
                          mii->mii_media_active |= IFM_NONE;
                          return;
                  }
  
                  if (~siastat & (SIASTAT_LS10 | SIASTAT_LS100))
                          mii->mii_media_status |= IFM_ACTIVE;
  
                  if (siastat & SIASTAT_LPN) {
                          anlpar = SIASTAT_GETLPC(siastat);
                          if (anlpar & ANLPAR_T4 &&
                              sc->sc_sia_cap & BMSR_100T4)
                                  mii->mii_media_active |= IFM_100_T4;
                          else if (anlpar & ANLPAR_TX_FD &&
                                   sc->sc_sia_cap & BMSR_100TXFDX)
                                  mii->mii_media_active |= IFM_100_TX|IFM_FDX;
                          else if (anlpar & ANLPAR_TX &&
                                   sc->sc_sia_cap & BMSR_100TXHDX)
                                  mii->mii_media_active |= IFM_100_TX;
                          else if (anlpar & ANLPAR_10_FD &&
                                   sc->sc_sia_cap & BMSR_10TFDX)
                                  mii->mii_media_active |= IFM_10_T|IFM_FDX;
                          else if (anlpar & ANLPAR_10 &&
                                   sc->sc_sia_cap & BMSR_10THDX)
                                  mii->mii_media_active |= IFM_10_T;
                          else
                                  mii->mii_media_active |= IFM_NONE;
                  } else {
                          /*
                           * If the other side doesn't support NWAY, then the
                           * best we can do is determine if we have a 10Mbps or
                           * 100Mbps link. There's no way to know if the link 
                           * is full or half duplex, so we default to half duplex
                           * and hope that the user is clever enough to manually
                           * change the media settings if we're wrong.
                           */
                          if ((siastat & SIASTAT_LS100) == 0)
                                  mii->mii_media_active |= IFM_100_TX;
                          else if ((siastat & SIASTAT_LS10) == 0)
                                  mii->mii_media_active |= IFM_10_T;
                          else
                                  mii->mii_media_active |= IFM_NONE;
                  }
          } else {
                  if (~siastat & (SIASTAT_LS10 | SIASTAT_LS100))
                          mii->mii_media_status |= IFM_ACTIVE;
  
                  if (sc->sc_opmode & OPMODE_TTM)
                          mii->mii_media_active |= IFM_10_T;
                  else
                          mii->mii_media_active |= IFM_100_TX;
                  if (sc->sc_opmode & OPMODE_FD)
                          mii->mii_media_active |= IFM_FDX;
          }
  }
  
  void
  tlp_2114x_isv_tmsw_get(sc, ifmr)
          struct tulip_softc *sc;
          struct ifmediareq *ifmr;
  {
          struct ifmedia_entry *ife = sc->sc_mii.mii_media.ifm_cur;
          struct tulip_21x4x_media *tm = ife->ifm_aux;
  
          (*tm->tm_get)(sc, ifmr);
  }
  
  int
  tlp_2114x_isv_tmsw_set(sc)
          struct tulip_softc *sc;
  {
          struct ifmedia_entry *ife = sc->sc_mii.mii_media.ifm_cur;
          struct tulip_21x4x_media *tm = ife->ifm_aux;
  
          /*
           * Check to see if we need to reset the chip, and do it.  The
           * reset path will get the OPMODE register right the next
           * time through.
           */
          if (TULIP_MEDIA_NEEDSRESET(sc, tm->tm_opmode))
                  return (tlp_init(&sc->sc_ethercom.ec_if));
  
          return ((*tm->tm_set)(sc));
  }
  
  /*
   * MII-on-SIO media switch.  Handles only MII attached to the SIO.
   */
  void    tlp_sio_mii_tmsw_init __P((struct tulip_softc *));
  
  const struct tulip_mediasw tlp_sio_mii_mediasw = {
          tlp_sio_mii_tmsw_init, tlp_mii_getmedia, tlp_mii_setmedia
  };
  
  void
  tlp_sio_mii_tmsw_init(sc)
          struct tulip_softc *sc;
  {
          struct ifnet *ifp = &sc->sc_ethercom.ec_if;
  
          /*
           * We don't attach any media info structures to the ifmedia
           * entries, so if we're using a pre-init function that needs
           * that info, override it to one that doesn't.
           */
          if (sc->sc_preinit == tlp_2114x_preinit)
                  sc->sc_preinit = tlp_2114x_mii_preinit;
  
          sc->sc_mii.mii_ifp = ifp;
          sc->sc_mii.mii_readreg = tlp_bitbang_mii_readreg;
          sc->sc_mii.mii_writereg = tlp_bitbang_mii_writereg;
          sc->sc_mii.mii_statchg = sc->sc_statchg;
          ifmedia_init(&sc->sc_mii.mii_media, 0, tlp_mediachange,
              tlp_mediastatus);
          mii_attach(&sc->sc_dev, &sc->sc_mii, 0xffffffff, MII_PHY_ANY,
              MII_OFFSET_ANY, 0);
          if (LIST_FIRST(&sc->sc_mii.mii_phys) == NULL) {
                  ifmedia_add(&sc->sc_mii.mii_media, IFM_ETHER|IFM_NONE, 0, NULL);
                  ifmedia_set(&sc->sc_mii.mii_media, IFM_ETHER|IFM_NONE);
          } else {
                  sc->sc_flags |= TULIPF_HAS_MII;
                  sc->sc_tick = tlp_mii_tick;
                  ifmedia_set(&sc->sc_mii.mii_media, IFM_ETHER|IFM_AUTO);
          }
  }
  
  /*
   * Lite-On PNIC media switch.  Must handle MII or internal NWAY.
   */
  void    tlp_pnic_tmsw_init __P((struct tulip_softc *));
  void    tlp_pnic_tmsw_get __P((struct tulip_softc *, struct ifmediareq *));
  int     tlp_pnic_tmsw_set __P((struct tulip_softc *));
  
  const struct tulip_mediasw tlp_pnic_mediasw = {
          tlp_pnic_tmsw_init, tlp_pnic_tmsw_get, tlp_pnic_tmsw_set
  };
  
  void    tlp_pnic_nway_statchg __P((struct device *));
  void    tlp_pnic_nway_tick __P((void *));
  int     tlp_pnic_nway_service __P((struct tulip_softc *, int));
  void    tlp_pnic_nway_reset __P((struct tulip_softc *));
  int     tlp_pnic_nway_auto __P((struct tulip_softc *, int));
  void    tlp_pnic_nway_auto_timeout __P((void *));
  void    tlp_pnic_nway_status __P((struct tulip_softc *));
  void    tlp_pnic_nway_acomp __P((struct tulip_softc *));
  
  void
  tlp_pnic_tmsw_init(sc)
          struct tulip_softc *sc;
  {
          struct ifnet *ifp = &sc->sc_ethercom.ec_if;
          const char *sep = "";
  
  #define ADD(m, c)       ifmedia_add(&sc->sc_mii.mii_media, (m), (c), NULL)
  #define PRINT(str)      printf("%s%s", sep, str); sep = ", "
  
          sc->sc_mii.mii_ifp = ifp;
          sc->sc_mii.mii_readreg = tlp_pnic_mii_readreg;
          sc->sc_mii.mii_writereg = tlp_pnic_mii_writereg;
          sc->sc_mii.mii_statchg = sc->sc_statchg;
          ifmedia_init(&sc->sc_mii.mii_media, 0, tlp_mediachange,
              tlp_mediastatus);
          mii_attach(&sc->sc_dev, &sc->sc_mii, 0xffffffff, MII_PHY_ANY,
              MII_OFFSET_ANY, 0);
          if (LIST_FIRST(&sc->sc_mii.mii_phys) == NULL) {
                  /* XXX What about AUI/BNC support? */
                  printf("%s: ", sc->sc_dev.dv_xname);
  
                  tlp_pnic_nway_reset(sc);
  
                  ADD(IFM_MAKEWORD(IFM_ETHER, IFM_10_T, 0, 0),
                      PNIC_NWAY_TW|PNIC_NWAY_CAP10T);
                  PRINT("10baseT");
  
                  ADD(IFM_MAKEWORD(IFM_ETHER, IFM_10_T, IFM_FDX, 0),
                      PNIC_NWAY_TW|PNIC_NWAY_FD|PNIC_NWAY_CAP10TFDX);
                  PRINT("10baseT-FDX");
  
                  ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, 0, 0),
                      PNIC_NWAY_TW|PNIC_NWAY_100|PNIC_NWAY_CAP100TX);
                  PRINT("100baseTX");
  
                  ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_FDX, 0),
                      PNIC_NWAY_TW|PNIC_NWAY_100|PNIC_NWAY_FD|
                      PNIC_NWAY_CAP100TXFDX);
                  PRINT("100baseTX-FDX");
  
                  ADD(IFM_MAKEWORD(IFM_ETHER, IFM_AUTO, 0, 0),
                      PNIC_NWAY_TW|PNIC_NWAY_RN|PNIC_NWAY_NW|
                      PNIC_NWAY_CAP10T|PNIC_NWAY_CAP10TFDX|
                      PNIC_NWAY_CAP100TXFDX|PNIC_NWAY_CAP100TX);
                  PRINT("auto");
  
                  printf("\n");
  
                  sc->sc_statchg = tlp_pnic_nway_statchg;
                  sc->sc_tick = tlp_pnic_nway_tick;
                  ifmedia_set(&sc->sc_mii.mii_media, IFM_ETHER|IFM_AUTO);
          } else {
                  sc->sc_flags |= TULIPF_HAS_MII;
                  sc->sc_tick = tlp_mii_tick;
                  ifmedia_set(&sc->sc_mii.mii_media, IFM_ETHER|IFM_AUTO);
          }
  
  #undef ADD
  #undef PRINT
  }
  
  void
  tlp_pnic_tmsw_get(sc, ifmr)
          struct tulip_softc *sc;
          struct ifmediareq *ifmr;
  {
          struct mii_data *mii = &sc->sc_mii;
  
          if (sc->sc_flags & TULIPF_HAS_MII)
                  tlp_mii_getmedia(sc, ifmr);
          else {
                  mii->mii_media_status = 0;
                  mii->mii_media_active = IFM_NONE;
                  tlp_pnic_nway_service(sc, MII_POLLSTAT);
                  ifmr->ifm_status = sc->sc_mii.mii_media_status;
                  ifmr->ifm_active = sc->sc_mii.mii_media_active; 
          }
  }
  
  int
  tlp_pnic_tmsw_set(sc)
          struct tulip_softc *sc;
  {
          struct ifnet *ifp = &sc->sc_ethercom.ec_if;
          struct mii_data *mii = &sc->sc_mii;
  
          if (sc->sc_flags & TULIPF_HAS_MII) {
                  /*
                   * Make sure the built-in Tx jabber timer is disabled.
                   */
                  TULIP_WRITE(sc, CSR_PNIC_ENDEC, PNIC_ENDEC_JDIS);
  
                  return (tlp_mii_setmedia(sc));
          }
  
          if (ifp->if_flags & IFF_UP) {
                  mii->mii_media_status = 0;
                  mii->mii_media_active = IFM_NONE;
                  return (tlp_pnic_nway_service(sc, MII_MEDIACHG));
          }
  
          return (0);
  }
  
  void
  tlp_pnic_nway_statchg(self)
          struct device *self;
  {
          struct tulip_softc *sc = (struct tulip_softc *)self;
  
          /* Idle the transmit and receive processes. */
          tlp_idle(sc, OPMODE_ST|OPMODE_SR);
  
          sc->sc_opmode &= ~(OPMODE_TTM|OPMODE_FD|OPMODE_PS|OPMODE_PCS|
              OPMODE_SCR|OPMODE_HBD);
  
          if (IFM_SUBTYPE(sc->sc_mii.mii_media_active) == IFM_10_T) {
                  sc->sc_opmode |= OPMODE_TTM;
                  TULIP_WRITE(sc, CSR_GPP,
                      GPP_PNIC_OUT(GPP_PNIC_PIN_SPEED_RLY, 0) |
                      GPP_PNIC_OUT(GPP_PNIC_PIN_100M_LPKB, 1));
          } else {
                  sc->sc_opmode |= OPMODE_PS|OPMODE_PCS|OPMODE_SCR|OPMODE_HBD;
                  TULIP_WRITE(sc, CSR_GPP,
                      GPP_PNIC_OUT(GPP_PNIC_PIN_SPEED_RLY, 1) |
                      GPP_PNIC_OUT(GPP_PNIC_PIN_100M_LPKB, 1));
          }
  
          if (sc->sc_mii.mii_media_active & IFM_FDX)
                  sc->sc_opmode |= OPMODE_FD|OPMODE_HBD;
  
          /*
           * Write new OPMODE bits.  This also restarts the transmit
           * and receive processes.
           */
          TULIP_WRITE(sc, CSR_OPMODE, sc->sc_opmode);
  }
  
  void
  tlp_pnic_nway_tick(arg)
          void *arg;
  {
          struct tulip_softc *sc = arg;
          int s;
  
          if ((sc->sc_dev.dv_flags & DVF_ACTIVE) == 0)
                  return;
  
          s = splnet();
          tlp_pnic_nway_service(sc, MII_TICK);
          splx(s);
  
          callout_reset(&sc->sc_tick_callout, hz, tlp_pnic_nway_tick, sc);
  }
  
  /*
   * Support for the Lite-On PNIC internal NWay block.  This is constructed
   * somewhat like a PHY driver for simplicity.
   */
  
  int
  tlp_pnic_nway_service(sc, cmd)
          struct tulip_softc *sc;
          int cmd;
  {
          struct mii_data *mii = &sc->sc_mii;
          struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
  
          if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
                  return (0);
  
          switch (cmd) {
          case MII_POLLSTAT:
                  /* Nothing special to do here. */
                  break;
  
          case MII_MEDIACHG:
                  switch (IFM_SUBTYPE(ife->ifm_media)) {
                  case IFM_AUTO:
                          (void) tlp_pnic_nway_auto(sc, 1);
                          break;
                  case IFM_100_T4:
                          /*
                           * XXX Not supported as a manual setting right now.
                           */
                          return (EINVAL);
                  default:
                          /*
                           * NWAY register data is stored in the ifmedia entry.
                           */
                          TULIP_WRITE(sc, CSR_PNIC_NWAY, ife->ifm_data);
                  }
                  break;
  
          case MII_TICK:
                  /*
                   * Only used for autonegotiation.
                   */
                  if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO)
                          return (0);
  
                  /*
                   * Check to see if we have link.  If we do, we don't
                   * need to restart the autonegotiation process.
                   */
                  if (sc->sc_flags & TULIPF_LINK_UP)
                          return (0);
  
                  /*
                   * Only retry autonegotiation every 5 seconds.
                   */
                  if (++sc->sc_nway_ticks != 5)
                          return (0);
  
                  sc->sc_nway_ticks = 0;
                  tlp_pnic_nway_reset(sc);
                  if (tlp_pnic_nway_auto(sc, 0) == EJUSTRETURN)
                          return (0);
                  break;
          }
  
          /* Update the media status. */
          tlp_pnic_nway_status(sc);
  
          /* Callback if something changed. */
          if ((sc->sc_nway_active == NULL ||
               sc->sc_nway_active->ifm_media != mii->mii_media_active) ||
              cmd == MII_MEDIACHG) {
                  (*sc->sc_statchg)(&sc->sc_dev);
                  tlp_nway_activate(sc, mii->mii_media_active);
          }
          return (0);
  }
  
  void
  tlp_pnic_nway_reset(sc)
          struct tulip_softc *sc;
  {
  
          TULIP_WRITE(sc, CSR_PNIC_NWAY, PNIC_NWAY_RS);
          delay(100);
          TULIP_WRITE(sc, CSR_PNIC_NWAY, 0);
  }
  
  int
  tlp_pnic_nway_auto(sc, waitfor)
          struct tulip_softc *sc;
          int waitfor;
  {
          struct mii_data *mii = &sc->sc_mii;
          struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
          u_int32_t reg;
          int i;
  
          if ((sc->sc_flags & TULIPF_DOINGAUTO) == 0)
                  TULIP_WRITE(sc, CSR_PNIC_NWAY, ife->ifm_data);
  
          if (waitfor) {
                  /* Wait 500ms for it to complete. */
                  for (i = 0; i < 500; i++) {
                          reg = TULIP_READ(sc, CSR_PNIC_NWAY);
                          if (reg & PNIC_NWAY_LPAR_MASK) {
                                  tlp_pnic_nway_acomp(sc);
                                  return (0);
                          }
                          delay(1000);
                  }
  #if 0
                  if ((reg & PNIC_NWAY_LPAR_MASK) == 0)
                          printf("%s: autonegotiation failed to complete\n",
                              sc->sc_dev.dv_xname);
  #endif
  
                  /*
                   * Don't need to worry about clearing DOINGAUTO.
                   * If that's set, a timeout is pending, and it will
                   * clear the flag.
                   */
                  return (EIO);
          }
  
          /*
           * Just let it finish asynchronously.  This is for the benefit of
           * the tick handler driving autonegotiation.  Don't want 500ms
           * delays all the time while the system is running!
           */
          if ((sc->sc_flags & TULIPF_DOINGAUTO) == 0) {
                  sc->sc_flags |= TULIPF_DOINGAUTO;
                  callout_reset(&sc->sc_nway_callout, hz >> 1,
                      tlp_pnic_nway_auto_timeout, sc);
          }
          return (EJUSTRETURN);
  }
  
  void
  tlp_pnic_nway_auto_timeout(arg)
          void *arg;
  {
          struct tulip_softc *sc = arg;
          u_int32_t reg;
          int s;
  
          s = splnet();
          sc->sc_flags &= ~TULIPF_DOINGAUTO;
          reg = TULIP_READ(sc, CSR_PNIC_NWAY);
  #if 0
          if ((reg & PNIC_NWAY_LPAR_MASK) == 0)
                  printf("%s: autonegotiation failed to complete\n",
                      sc->sc_dev.dv_xname);
  #endif
  
          tlp_pnic_nway_acomp(sc);
  
          /* Update the media status. */
          (void) tlp_pnic_nway_service(sc, MII_POLLSTAT);
          splx(s);
  }
  
  void
  tlp_pnic_nway_status(sc)
          struct tulip_softc *sc;
  {
          struct mii_data *mii = &sc->sc_mii;
          u_int32_t reg;
  
          mii->mii_media_status = IFM_AVALID;
          mii->mii_media_active = IFM_ETHER;
  
          reg = TULIP_READ(sc, CSR_PNIC_NWAY);
  
          if (sc->sc_flags & TULIPF_LINK_UP)
                  mii->mii_media_status |= IFM_ACTIVE;
  
          if (reg & PNIC_NWAY_NW) {
                  if ((reg & PNIC_NWAY_LPAR_MASK) == 0) {
                          /* Erg, still trying, I guess... */
                          mii->mii_media_active |= IFM_NONE;
                          return;
                  }
  
  #if 0
                  if (reg & PNIC_NWAY_LPAR100T4)
                          mii->mii_media_active |= IFM_100_T4;
                  else
  #endif
                  if (reg & PNIC_NWAY_LPAR100TXFDX)
                          mii->mii_media_active |= IFM_100_TX|IFM_FDX;
                  else if (reg & PNIC_NWAY_LPAR100TX)
                          mii->mii_media_active |= IFM_100_TX;
                  else if (reg & PNIC_NWAY_LPAR10TFDX)
                          mii->mii_media_active |= IFM_10_T|IFM_FDX;
                  else if (reg & PNIC_NWAY_LPAR10T)
                          mii->mii_media_active |= IFM_10_T;
                  else
                          mii->mii_media_active |= IFM_NONE;
          } else {
                  if (reg & PNIC_NWAY_100)
                          mii->mii_media_active |= IFM_100_TX;
                  else
                          mii->mii_media_active |= IFM_10_T;
                  if (reg & PNIC_NWAY_FD)
                          mii->mii_media_active |= IFM_FDX;
          }
  }
  
  void
  tlp_pnic_nway_acomp(sc)
          struct tulip_softc *sc;
  {
          u_int32_t reg;
  
          reg = TULIP_READ(sc, CSR_PNIC_NWAY);
          reg &= ~(PNIC_NWAY_FD|PNIC_NWAY_100|PNIC_NWAY_RN);
  
          if (reg & (PNIC_NWAY_LPAR100TXFDX|PNIC_NWAY_LPAR100TX))
                  reg |= PNIC_NWAY_100;
          if (reg & (PNIC_NWAY_LPAR10TFDX|PNIC_NWAY_LPAR100TXFDX))
                  reg |= PNIC_NWAY_FD;
  
          TULIP_WRITE(sc, CSR_PNIC_NWAY, reg);
  }
  
  /*
   * Macronix PMAC and Lite-On PNIC-II media switch:
   *
   *      MX98713 and MX98713A            21140-like MII or GPIO media.
   *
   *      MX98713A                        21143-like MII or SIA/SYM media.
   *
   *      MX98715, MX98715A, MX98725,     21143-like SIA/SYM media.
   *      82C115, MX98715AEC-C, -E
   *
   * So, what we do here is fake MII-on-SIO or ISV media info, and
   * use the ISV media switch get/set functions to handle the rest.
   */
  
  void    tlp_pmac_tmsw_init __P((struct tulip_softc *));
  
  const struct tulip_mediasw tlp_pmac_mediasw = {
          tlp_pmac_tmsw_init, tlp_2114x_isv_tmsw_get, tlp_2114x_isv_tmsw_set
  };
  
  const struct tulip_mediasw tlp_pmac_mii_mediasw = {
          tlp_pmac_tmsw_init, tlp_mii_getmedia, tlp_mii_setmedia
  };
  
  void
  tlp_pmac_tmsw_init(sc)
          struct tulip_softc *sc;
  {
          static const u_int8_t media[] = {
                  TULIP_ROM_MB_MEDIA_TP,
                  TULIP_ROM_MB_MEDIA_TP_FDX,
                  TULIP_ROM_MB_MEDIA_100TX,
                  TULIP_ROM_MB_MEDIA_100TX_FDX,
          };
          struct ifnet *ifp = &sc->sc_ethercom.ec_if;
          struct tulip_21x4x_media *tm;
  
          sc->sc_mii.mii_ifp = ifp;
          sc->sc_mii.mii_readreg = tlp_bitbang_mii_readreg;
          sc->sc_mii.mii_writereg = tlp_bitbang_mii_writereg;
          sc->sc_mii.mii_statchg = sc->sc_statchg;
          ifmedia_init(&sc->sc_mii.mii_media, 0, tlp_mediachange,
              tlp_mediastatus);
          if (sc->sc_chip == TULIP_CHIP_MX98713 ||
              sc->sc_chip == TULIP_CHIP_MX98713A) {
                  mii_attach(&sc->sc_dev, &sc->sc_mii, 0xffffffff,
                      MII_PHY_ANY, MII_OFFSET_ANY, 0);
                  if (LIST_FIRST(&sc->sc_mii.mii_phys) != NULL) {
                          sc->sc_flags |= TULIPF_HAS_MII;
                          sc->sc_tick = tlp_mii_tick;
                          sc->sc_preinit = tlp_2114x_mii_preinit;
                          sc->sc_mediasw = &tlp_pmac_mii_mediasw;
                          ifmedia_set(&sc->sc_mii.mii_media,
                              IFM_ETHER|IFM_AUTO);
                          return;
                  }
          }
  
          switch (sc->sc_chip) {
          case TULIP_CHIP_MX98713:
                  tlp_add_srom_media(sc, TULIP_ROM_MB_21140_GPR,
                      tlp_21140_gpio_get, tlp_21140_gpio_set, media, 4);
  
                  /*
                   * XXX Should implement auto-sense for this someday,
                   * XXX when we do the same for the 21140.
                   */
                  ifmedia_set(&sc->sc_mii.mii_media, IFM_ETHER|IFM_10_T);
                  break;
  
          default:
                  tlp_add_srom_media(sc, TULIP_ROM_MB_21142_SIA,
                      tlp_sia_get, tlp_sia_set, media, 2);
                  tlp_add_srom_media(sc, TULIP_ROM_MB_21143_SYM,
                      tlp_sia_get, tlp_sia_set, media + 2, 2);
  
                  tm = malloc(sizeof(*tm), M_DEVBUF, M_WAITOK|M_ZERO);
                  tm->tm_name = "auto";
                  tm->tm_get = tlp_2114x_nway_get;
                  tm->tm_set = tlp_2114x_nway_set;
                  ifmedia_add(&sc->sc_mii.mii_media,
                      IFM_MAKEWORD(IFM_ETHER, IFM_AUTO, 0, 0), 0, tm);
  
                  ifmedia_set(&sc->sc_mii.mii_media, IFM_ETHER|IFM_AUTO);
                  sc->sc_statchg = tlp_2114x_nway_statchg;
                  sc->sc_tick = tlp_2114x_nway_tick;
                  break;
          }
  
          tlp_print_media(sc);
          tlp_sia_fixup(sc);
  
          /* Set the LED modes. */
          tlp_pmac_reset(sc);
  
          sc->sc_reset = tlp_pmac_reset;
  }
  
  /*
   * ADMtek AL981 media switch.  Only has internal PHY.
   */
  void    tlp_al981_tmsw_init __P((struct tulip_softc *));
  
  const struct tulip_mediasw tlp_al981_mediasw = {
          tlp_al981_tmsw_init, tlp_mii_getmedia, tlp_mii_setmedia
  };
  
  void
  tlp_al981_tmsw_init(sc)
          struct tulip_softc *sc;
  {
          struct ifnet *ifp = &sc->sc_ethercom.ec_if;
  
          sc->sc_mii.mii_ifp = ifp;
          sc->sc_mii.mii_readreg = tlp_al981_mii_readreg;
          sc->sc_mii.mii_writereg = tlp_al981_mii_writereg;
          sc->sc_mii.mii_statchg = sc->sc_statchg;
          ifmedia_init(&sc->sc_mii.mii_media, 0, tlp_mediachange,
              tlp_mediastatus);
          mii_attach(&sc->sc_dev, &sc->sc_mii, 0xffffffff, MII_PHY_ANY,
              MII_OFFSET_ANY, 0);
          if (LIST_FIRST(&sc->sc_mii.mii_phys) == NULL) {
                  ifmedia_add(&sc->sc_mii.mii_media, IFM_ETHER|IFM_NONE, 0, NULL);
                  ifmedia_set(&sc->sc_mii.mii_media, IFM_ETHER|IFM_NONE);
          } else {
                  sc->sc_flags |= TULIPF_HAS_MII;
                  sc->sc_tick = tlp_mii_tick;
                  ifmedia_set(&sc->sc_mii.mii_media, IFM_ETHER|IFM_AUTO);
          }
  }
  
  /*
   * ADMtek AN983/985 media switch.  Only has internal PHY, but
   * on an SIO-like interface.  Unfortunately, we can't use the
   * standard SIO media switch, because the AN985 "ghosts" the
   * singly PHY at every address.
   */
  void    tlp_an985_tmsw_init __P((struct tulip_softc *));
  
  const struct tulip_mediasw tlp_an985_mediasw = {
          tlp_an985_tmsw_init, tlp_mii_getmedia, tlp_mii_setmedia
  };
  
  void
  tlp_an985_tmsw_init(sc)
          struct tulip_softc *sc;
  {
          struct ifnet *ifp = &sc->sc_ethercom.ec_if;
  
          sc->sc_mii.mii_ifp = ifp;
          sc->sc_mii.mii_readreg = tlp_bitbang_mii_readreg;
          sc->sc_mii.mii_writereg = tlp_bitbang_mii_writereg;
          sc->sc_mii.mii_statchg = sc->sc_statchg;
          ifmedia_init(&sc->sc_mii.mii_media, 0, tlp_mediachange,
              tlp_mediastatus);
          mii_attach(&sc->sc_dev, &sc->sc_mii, 0xffffffff, 1,
              MII_OFFSET_ANY, 0);
          if (LIST_FIRST(&sc->sc_mii.mii_phys) == NULL) {
                  ifmedia_add(&sc->sc_mii.mii_media, IFM_ETHER|IFM_NONE, 0, NULL);
                  ifmedia_set(&sc->sc_mii.mii_media, IFM_ETHER|IFM_NONE);
          } else {
                  sc->sc_flags |= TULIPF_HAS_MII;
                  sc->sc_tick = tlp_mii_tick;
                  ifmedia_set(&sc->sc_mii.mii_media, IFM_ETHER|IFM_AUTO);
          }
  }
  
  /*
   * Davicom DM9102 media switch.  Internal PHY and possibly HomePNA.
   */
  void    tlp_dm9102_tmsw_init __P((struct tulip_softc *));
  void    tlp_dm9102_tmsw_getmedia __P((struct tulip_softc *,
              struct ifmediareq *));
  int     tlp_dm9102_tmsw_setmedia __P((struct tulip_softc *));
  
  const struct tulip_mediasw tlp_dm9102_mediasw = {
          tlp_dm9102_tmsw_init, tlp_dm9102_tmsw_getmedia,
              tlp_dm9102_tmsw_setmedia
  };
  
  void
  tlp_dm9102_tmsw_init(sc)
          struct tulip_softc *sc;
  {
          struct ifnet *ifp = &sc->sc_ethercom.ec_if;
          u_int32_t opmode;
  
          sc->sc_mii.mii_ifp = ifp;
          sc->sc_mii.mii_readreg = tlp_bitbang_mii_readreg;
          sc->sc_mii.mii_writereg = tlp_bitbang_mii_writereg;
          sc->sc_mii.mii_statchg = sc->sc_statchg;
          ifmedia_init(&sc->sc_mii.mii_media, 0, tlp_mediachange,
              tlp_mediastatus);
  
          /* PHY block already reset via tlp_reset(). */
  
          /*
           * Configure OPMODE properly for the internal MII interface.
           */
          switch (sc->sc_chip) {
          case TULIP_CHIP_DM9102:
                  opmode = OPMODE_MBO|OPMODE_HBD|OPMODE_PS;
                  break;
  
          case TULIP_CHIP_DM9102A:
                  opmode = OPMODE_MBO|OPMODE_HBD;
                  break;
  
          default:
                  opmode = 0;
                  break;
          }
  
          TULIP_WRITE(sc, CSR_OPMODE, opmode);
  
          /* Now, probe the internal MII for the internal PHY. */
          mii_attach(&sc->sc_dev, &sc->sc_mii, 0xffffffff, MII_PHY_ANY,
              MII_OFFSET_ANY, 0);
  
          /*
           * XXX Figure out what to do about the HomePNA portion
           * XXX of the DM9102A.
           */
  
          if (LIST_FIRST(&sc->sc_mii.mii_phys) == NULL) {
                  ifmedia_add(&sc->sc_mii.mii_media, IFM_ETHER|IFM_NONE, 0, NULL);
                  ifmedia_set(&sc->sc_mii.mii_media, IFM_ETHER|IFM_NONE);
          } else {
                  sc->sc_flags |= TULIPF_HAS_MII;
                  sc->sc_tick = tlp_mii_tick;
                  ifmedia_set(&sc->sc_mii.mii_media, IFM_ETHER|IFM_AUTO);
          }
  }
  
  void
  tlp_dm9102_tmsw_getmedia(sc, ifmr)
          struct tulip_softc *sc;
          struct ifmediareq *ifmr;
  {
  
          /* XXX HomePNA on DM9102A. */
          tlp_mii_getmedia(sc, ifmr);
  }
  
  int
  tlp_dm9102_tmsw_setmedia(sc)
          struct tulip_softc *sc;
  {
  
          /* XXX HomePNA on DM9102A. */
          return (tlp_mii_setmedia(sc));
  }