freebsd/sys/i386/isa/if_zp.c

/*
 * This code is based on
 *  (1) FreeBSD implementation on ISA/EISA Ethelink III by Herb Peyerl
 *  (2) Linux implementation on PCMCIA Etherlink III by Devid Hinds
 *  (3) FreeBSD implementation on PCMCIA IBM Ethernet Card I/II
 *      by David Greenman
 *  (4) RT-Mach implementation on PCMCIA/ISA/EISA Etherlink III
 *      by Seiji Murata
 *
 *  Copyright (c) by HOSOKAWA, Tatsumi <hosokawa@mt.cs.keio.ac.jp>
 *  Copyright (c) by Seiji Murata <seiji@mt.cs.keio.ac.jp>
 */
/*
 * Copyright (c) 1993 Herb Peyerl <hpeyerl@novatel.ca>
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR 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.
 *
 *	From: if_ep.c,v 1.9 1994/01/25 10:46:29 deraadt Exp $
 *	$Id: if_zp.c,v 1.10 1995/10/26 20:29:53 julian Exp $
 */
/*-
 * TODO:
 * [1] integrate into current if_ed.c
 * [2] parse tuples to find out where to map the shared memory buffer,
 *     and what to write into the configuration register
 * [3] move pcic-specific code into a separate module.
 *
 * Device driver for IBM PCMCIA Credit Card Adapter for Ethernet,
 * if_ze.c
 *
 * Based on the Device driver for National Semiconductor DS8390 ethernet
 * adapters by David Greenman.  Modifications for PCMCIA by Keith Moore.
 * Adapted for FreeBSD 1.1.5 by Jordan Hubbard.
 *
 * Currently supports only the IBM Credit Card Adapter for Ethernet, but
 * could probably work with other PCMCIA cards also, if it were modified
 * to get the locations of the PCMCIA configuration option register (COR)
 * by parsing the configuration tuples, rather than by hard-coding in
 * the value expected by IBM's card.
 *
 * Sources for data on the PCMCIA/IBM CCAE specific portions of the driver:
 *
 * [1] _Local Area Network Credit Card Adapters Technical Reference_,
 *     IBM Corp., SC30-3585-00, part # 33G9243.
 * [2] "pre-alpha" PCMCIA support code for Linux by Barry Jaspan.
 * [3] Intel 82536SL PC Card Interface Controller Data Sheet, Intel
 *     Order Number 290423-002
 * [4] National Semiconductor DP83902A ST-NIC (tm) Serial Network
 *     Interface Controller for Twisted Pair data sheet.
 *
 *
 * Copyright (C) 1993, David Greenman. This software may be used, modified,
 *   copied, distributed, and sold, in both source and binary form provided
 *   that the above copyright and these terms are retained. Under no
 *   circumstances is the author responsible for the proper functioning
 *   of this software, nor does the author assume any responsibility
 *   for damages incurred with its use.
 */
/*======================================================================

    A PCMCIA ethernet driver for the 3com 3c589 card.

    Written by David Hinds, dhinds@allegro.stanford.edu

    The network driver code is based on Donald Becker's 3c589 code:

    Written 1994 by Donald Becker.
    Copyright 1993 United States Government as represented by the
    Director, National Security Agency.  This software may be used and
    distributed according to the terms of the GNU Public License,
    incorporated herein by reference.
    Donald Becker may be reached at becker@cesdis1.gsfc.nasa.gov

======================================================================*/
/*
 * I doubled delay loops in this file because it is not enough for some
 * laptop machines' PCIC (especially, on my Chaplet ILFA 350 ^^;).
 *                        HOSOKAWA, Tatsumi <hosokawa@mt.cs.keio.ac.jp>
 */
/*
 * Very small patch for IBM Ethernet PCMCIA Card II and IBM ThinkPad230Cs.
 *			ETO, Toshihisa <eto@osl.fujitsu.co.jp>
 */

#include "zp.h"
#if	NZP > 0
#ifdef	MACH_KERNEL

#define IF_CNTRS	MACH

#include	<mach_ttd.h>
#include	<kern/time_out.h>
#include	<device/device_types.h>
#include	<device/errno.h>
#include	<device/io_req.h>
#include	<device/if_hdr.h>
#include	<device/if_ether.h>
#include	<device/net_status.h>
#include	<device/net_io.h>

#include	<i386/ipl.h>
#include	<chips/busses.h>

#include 	<i386at/if_zpreg.h>

#define	SPLNET	spl6

#if	MACH_TTD
#include <ttd/ttd_stub.h>
#endif	/* MACH_TTD */

#include "i82365.h"

#define	MAXSLOT	8
#define	SHARED_MEMORY

enum memtype {
    COMMON, ATTRIBUTE
};

#else	/* MACH_KERNEL */

#include "bpfilter.h"

#include <sys/param.h>
#if defined(__FreeBSD__)
#include <sys/systm.h>
#include <sys/kernel.h>
#endif
#include <sys/mbuf.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <sys/errno.h>
#include <sys/syslog.h>
#if defined(__NetBSD__)
#include <sys/select.h>
#endif

#include <net/if.h>
#include <net/if_dl.h>
#include <net/if_types.h>

#ifdef INET
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/in_var.h>
#include <netinet/ip.h>
#include <netinet/if_ether.h>
#endif

#ifdef IPX
#include <netipx/ipx.h>
#include <netipx/ipx_if.h>
#endif

#ifdef NS
#include <netns/ns.h>
#include <netns/ns_if.h>
#endif

#if NBPFILTER > 0
#include <net/bpf.h>
#include <net/bpfdesc.h>
#endif

#if defined(__FreeBSD__)
#include <machine/clock.h>
#endif

#if defined(__FreeBSD__) && defined(ZP_DEBUG)
#include <i386/i386/cons.h>
#endif

#include <i386/isa/isa.h>
#include <i386/isa/isa_device.h>
#include <i386/isa/icu.h>
#include <i386/isa/if_zpreg.h>
#include <i386/isa/pcic.h>

#include "apm.h"
#if NAPM > 0
#include <machine/apm_bios.h>
#endif	/* NAPM > 0 */

#endif	/* MACH_KERNEL */

#define ETHER_MIN_LEN	64
#define ETHER_MAX_LEN	1518
#define ETHER_ADDR_LEN	6



/*****************************************************************************
 *                       Driver for Ethernet Adapter                         *
 *****************************************************************************/
/*
 * zp_softc: per line info and status
 */
struct zp_softc {
#ifdef	MACH_KERNEL
    struct ifnet    ds_if;	/* generic interface header */
    u_char          ds_addr[6];	/* Ethernet hardware address */
#else	/* MACH_KERNEL */
    struct arpcom   arpcom;	/* Ethernet common part		 */
#define MAX_MBS  8	/* # of mbufs we keep around	 */
    struct mbuf    *mb[MAX_MBS];	/* spare mbuf storage.		 */
    int             next_mb;	/* Which mbuf to use next. 	 */
    int             last_mb;	/* Last mbuf.			 */
    caddr_t         bpf;	/* BPF  "magic cookie"		 */
#endif	/* MACH_KERNEL */
    short           ep_io_addr;	/* i/o bus address		 */
    char            ep_connectors;	/* Connectors on this card.	 */
    int             tx_start_thresh;	/* Current TX_start_thresh.	 */
    char            bus32bit;	/* 32bit access possible	 */
#ifdef	MACH_KERNEL
    u_char          attached;
#endif
#ifndef	ORIGINAL
    u_short         if_port;
#endif	/* ORIGINAL */
    u_char          last_alive;	/* information for reconfiguration */
    u_char          last_up;	/* information for reconfiguration */
    int             slot;	/* PCMCIA slot */
#if NAPM > 		0
    struct apmhook  s_hook;	/* reconfiguration support */
    struct apmhook  r_hook;	/* reconfiguration support */
#endif	/* NAPM > 0 */
}               zp_softc[NZP];

#ifdef	MACH_KERNEL

int             zpprobe(), zpopen(), zpoutput(), zpsetinput(), zpgetstat(),
                zpsetstat(), zpintr();
void            zpattach(), zpinit(), zpstart(), zpread(), zpreset(),
                zpwatchdog(), zpstop();

static vm_offset_t zp_std[NZP] = {0};
static struct bus_device *zp_info[NZP];

struct bus_driver zpdriver =
{zpprobe, 0, zpattach, 0, zp_std, "zp", zp_info, 0, 0, 0};

typedef struct zp_softc zp_softc_t;

char           *zp_name = "zp";

static unsigned char card_info[256];

#define	splnet	spl7
#define	splimp	spl7

#else	/* MACH_KERNEL */

int zpprobe     __P((struct isa_device *));
int zpattach    __P((struct isa_device *));
static int zpioctl __P((struct ifnet * ifp, int, caddr_t));
static u_short read_eeprom_data __P((int, int));

void zpinit     __P((int));
void zpintr     __P((int));
void zpmbuffill __P((void *));
static void zpmbufempty __P((struct zp_softc *));
void zpread     __P((struct zp_softc *));
void zpreset    __P((int));
void zpstart    __P((struct ifnet *));
void zpstop     __P((int));
void zpwatchdog __P((int));

struct isa_driver zpdriver = {
    zpprobe,
    zpattach,
    "zp"
};


#endif	/* MACH_KERNEL */

#define CARD_INFO  "3Com Corporation~3C589"

static unsigned char card_info[256];

/*
 * scan the card information structure looking for the version/product info
 * tuple.  when we find it, compare it to the string we are looking for.
 * return 1 if we find it, 0 otherwise.
 */

static int
zp_check_cis(unsigned char *scratch)
{
    int             i, j, k;

    card_info[0] = '\0';
    i = 0;
    while (scratch[i] != 0xff && i < 1024) {
	unsigned char   link = scratch[i + 2];

#if 0
	printf("[%02x] %02x ", i, link);
	for (j = 4; j < 2 * link + 4 && j < 32; j += 2)
	    printf("%02x ", scratch[j + i]);
	printf("\n");
#endif
	if (scratch[i] == 0x15) {
	    /*
	     * level 1 version/product info copy to card_info, translating
	     * '\0' to '~'
	     */
	    k = 0;
	    for (j = i + 8; scratch[j] != 0xff; j += 2)
		card_info[k++] = scratch[j] == '\0' ? '~' : scratch[j];
	    card_info[k++] = '\0';
#ifdef ZP_DEBUG
	    printf("card info = %s\n", card_info);
	    printf("result = %d\n", bcmp(card_info, CARD_INFO, sizeof(CARD_INFO) - 1) == 0);
#endif
	    return (bcmp(card_info, CARD_INFO, sizeof(CARD_INFO) - 1) == 0);
	}
	i += 4 + 2 * link;
    }
    return 0;
}

/*
 * Probe each slot looking for an IBM Credit Card Adapter for Ethernet
 * For each card that we find, map its card information structure
 * into system memory at 'scratch' and see whether it's one of ours.
 * Return the slot number if we find a card, or -1 otherwise.
 *
 * Side effects:
 * + On success, leaves CIS mapped into memory at 'scratch';
 *   caller must free it.
 * + On success, leaves ethernet address in enet_addr.
 * + Leaves product/vendor id of last card probed in 'card_info'
 */

int             prev_slot = 0;

static int
zp_find_adapter(unsigned char *scratch, int reconfig)
{
    int             slot;

    for (slot = prev_slot; slot < MAXSLOT; ++slot) {
	/*
	 * see if there's a PCMCIA controller here Intel PCMCIA controllers
	 * use 0x82 and 0x83 IBM clone chips use 0x88 and 0x89, apparently
	 */
	/*
	 * IBM ThinkPad230Cs use 0x84.
	 */
	unsigned char   idbyte = pcic_getb(slot, PCIC_ID_REV);

	if (idbyte != 0x82 && idbyte != 0x83 &&
	    idbyte != 0x84 &&	/* for IBM ThinkPad 230Cs */
	    idbyte != 0x88 && idbyte != 0x89) {
#if 0
	    printf("ibmccae: pcic slot %d: wierd id/rev code 0x%02x\n",
		   slot, idbyte);
#endif
	    continue;
	}
	if ((pcic_getb(slot, PCIC_STATUS) & PCIC_CD) != PCIC_CD) {
	    if (!reconfig) {
		printf("zp: slot %d: no card in slot\n", slot);
	    } else {
		log(LOG_NOTICE, "zp: slot %d: no card in slot\n", slot);
	    }
	    /* no card in slot */
	    continue;
	}
	pcic_power_on(slot);
	pcic_reset(slot);
	/*
	 * map the card's attribute memory and examine its card information
	 * structure tuples for something we recognize.
	 */
#ifdef	MACH_KERNEL
	pcic_map_memory(slot, 0, scratch, 0L,
			0xFFFL, ATTRIBUTE, 1);
#else	/* MACH_KERNEL */
	pcic_map_memory(slot, 0, kvtop(scratch), 0L,
			0xFFFL, ATTRIBUTE, 1);
#endif	/* MACH_KERNEL */

	if ((zp_check_cis(scratch)) > 0) {
	    /* found it */
	    if (!reconfig) {
		printf("zp: found card in slot %d\n", slot);
	    } else {
		log(LOG_NOTICE, "zp: found card in slot %d\n", slot);
	    }
	    prev_slot = (prev_slot == MAXSLOT - 1) ? 0 : prev_slot + 1;

	    return slot;
	} else {
	    if (!reconfig) {
		printf("zp: pcmcia slot %d: %s\n", slot, card_info);
	    } else {
		log(LOG_NOTICE, "zp: pcmcia slot %d: %s\n", slot, card_info);
	    }
	}
	pcic_unmap_memory(slot, 0);
    }
    prev_slot = 0;
    return -1;
}


/*
 * macros to handle casting unsigned long to (char *) so we can
 * read/write into physical memory space.
 */

#define PEEK(addr) (*((unsigned char *)(addr)))
#define POKE(addr,val) do { PEEK(addr) = (val); } while (0)

/*
 * Determine if the device is present
 *
 *   on entry:
 * 	a pointer to an isa_device struct
 *   on exit:
 *	NULL if device not found
 *	or # of i/o addresses used (if found)
 */
#ifdef	MACH_KERNEL
int
zpprobe(port, dev)
    struct bus_device *dev;
#else	/* MACH_KERNEL */
int
zpprobe(struct isa_device * isa_dev)
#endif	/* MACH_KERNEL */
{
#ifdef	MACH_KERNEL
    zp_softc_t     *sc = &zp_softc[dev->unit];
#else	/* MACH_KERNEL */
    struct zp_softc *sc = &zp_softc[isa_dev->id_unit];
#endif	/* MACH_KERNEL */
    int             slot;
    u_short         k;
    int             re_init_flag;

#ifdef	ZP_DEBUG
    printf("### zpprobe ####\n");
#ifdef	MACH_KERNEL
    cngetc();
#endif	/* MACH_KERNEL */
#endif	/* ZP_DEBUG */


#ifdef	MACH_KERNEL
#define	DELAY(x)	delay(x * 10)
    sc->attached = 0;
    BASE = dev->address;
#endif	/* MACH_KERNEL */

    if ((slot = zp_find_adapter(isa_dev->id_maddr, isa_dev->id_reconfig)) < 0)
	return NULL;

    /*
     * okay, we found a card, so set it up
     */
    /*
     * Inhibit 16 bit memory delay. POINTETH.SYS apparently does this, for
     * what reason I don't know.
     */
    pcic_putb(slot, PCIC_CDGC,
	      pcic_getb(slot, PCIC_CDGC) | PCIC_16_DL_INH);
    /*
     * things to map (1) card's EEPROM is already mapped by the find_adapter
     * routine but we still need to get the card's ethernet address. after
     * that we unmap that part of attribute memory. (2) card configuration
     * registers need to be mapped in so we can set the configuration and
     * socket # registers. (3) shared memory packet buffer (4) i/o ports (5)
     * IRQ
     */
#ifdef	notdef
    /*
     * Sigh.  Location of the ethernet address isn't documented in [1]. It
     * was derived by doing a hex dump of all of attribute memory and looking
     * for the IBM vendor prefix.
     */
    enet_addr[0] = PEEK(isa_dev->id_maddr + 0xff0);
    enet_addr[1] = PEEK(isa_dev->id_maddr + 0xff2);
    enet_addr[2] = PEEK(isa_dev->id_maddr + 0xff4);
    enet_addr[3] = PEEK(isa_dev->id_maddr + 0xff6);
    enet_addr[4] = PEEK(isa_dev->id_maddr + 0xff8);
    enet_addr[5] = PEEK(isa_dev->id_maddr + 0xffa);
#endif
#if 0
    pcic_unmap_memory(slot, 0);
#endif
    re_init_flag = 0;
re_init:
    /*
     * (2) map card configuration registers.  these are offset in card memory
     * space by 0x20000.  normally we could get this offset from the card
     * information structure, but I'm too lazy and am not quite sure if I
     * understand the CIS anyway.
     *
     * XXX IF YOU'RE TRYING TO PORT THIS DRIVER FOR A DIFFERENT PCMCIA CARD, the
     * most likely thing to change is the constant 0x20000 in the next
     * statement.  Oh yes, also change the card id string that we probe for.
     */
#ifdef MACH_KERNEL
    pcic_map_memory(slot, 0, dev->phys_address, 0x10000, 8L,
		    ATTRIBUTE, 1);
    POKE(phystokv(dev->phys_address), 0x80);	/* reset the card (how long?) */
    DELAY(10000);
#else
    pcic_map_memory(slot, 0, kvtop(isa_dev->id_maddr), 0x10000, 8L,
		    ATTRIBUTE, 1);
    POKE(isa_dev->id_maddr, 0x80);	/* reset the card (how long?) */
    DELAY(40000);
#endif
    /*
     * Set the configuration index.  According to [1], the adapter won't
     * respond to any i/o signals until we do this; it uses the Memory Only
     * interface (whatever that is; it's not documented). Also turn on
     * "level" (not pulse) interrupts.
     *
     * XXX probably should init the socket and copy register also, so that we
     * can deal with multiple instances of the same card.
     */
#ifdef	MACH_KERNEL
    POKE(phystokv(dev->phys_address), 0x41);
    pcic_unmap_memory(slot, 0);
#else	/* MACH_KERNEL */
    POKE(isa_dev->id_maddr, 0x41);
    pcic_unmap_memory(slot, 0);
#endif	/* MACH_KERNEL */

#ifdef	notdef
    /*
     * (3) now map in the shared memory buffer.  This has to be mapped as
     * words, not bytes, and on a 16k boundary.  The offset value was derived
     * by installing IBM's POINTETH.SYS under DOS and looking at the PCIC
     * registers; it's not documented in IBM's tech ref manual ([1]).
     */
    pcic_map_memory(slot, 0, kvtop(isa_dev->id_maddr), 0x4000L, 0x4000L,
		    COMMON, 2);
#endif

    /*
     * (4) map i/o ports.
     *
     * XXX is it possible that the config file leaves this unspecified, in which
     * case we have to pick one?
     *
     * At least one PCMCIA device driver I'v seen maps a block of 32 consecutive
     * i/o ports as two windows of 16 ports each. Maybe some other pcic chips
     * are restricted to 16-port windows; the 82365SL doesn't seem to have
     * that problem.  But since we have an extra window anyway...
     */
#ifdef MACH_KERNEL
    pcic_map_io(slot, 0, dev->address, 16, 2);
#else
#if 1
    pcic_map_io(slot, 0, isa_dev->id_iobase, 16, 2);
#else
    pcic_map_io(slot, 0, isa_dev->id_iobase, 16, 1);
    pcic_map_io(slot, 1, isa_dev->id_iobase + 16, 16, 1);
#endif
#endif

    /*
     * (5) configure the card for the desired interrupt
     *
     * XXX is it possible that the config file leaves this unspecified?
     */
    pcic_map_irq(slot, ffs(isa_dev->id_irq) - 1);

    /* tell the PCIC that this is an I/O card (not memory) */
    pcic_putb(slot, PCIC_INT_GEN,
	      pcic_getb(slot, PCIC_INT_GEN) | PCIC_CARDTYPE);

#if 0
    /* tell the PCIC to use level-mode interrupts */
    /* XXX this register may not be present on all controllers */
    pcic_putb(slot, PCIC_GLO_CTRL,
	      pcic_getb(slot, PCIC_GLO_CTRL) | PCIC_LVL_MODE);
#endif

#ifdef ZP_DEBUG
    pcic_print_regs(slot);
#endif
#ifdef	notdef
    /* I couldn't find the following part in linux. seiji */

    /*
     * Setup i/o addresses
     */
    sc->nic_addr = isa_dev->id_iobase;
#if 0
    sc->vector = isa_dev->id_irq;
#endif
    sc->smem_start = (caddr_t) isa_dev->id_maddr;

#if 0
    sc->vendor = ZE_VENDOR_IBM;
    sc->type = xxx;
#endif

    /* reset card to force it into a known state */
    tmp = inb(isa_dev->id_iobase + ZE_RESET);
    DELAY(20000);
    outb(isa_dev->id_iobase + ZE_RESET, tmp);
    DELAY(20000);

    /*
     * query MAM bit in misc register for 10base2
     */
    tmp = inb(isa_dev->id_iobase + ZE_MISC);
    if (!tmp && !re_init_flag) {
	re_init_flag++;
	goto re_init;
    }
    sc->mau = tmp & 0x09 ? "10base2" : "10baseT";
#endif

#ifdef	MACH_KERNEL
    sc->ep_io_addr = dev->address;
#else	/* MACH_KERNEL */
    sc->ep_io_addr = isa_dev->id_iobase;
#endif	/* MACH_KERNEL */
    GO_WINDOW(0);
    k = read_eeprom_data(BASE, EEPROM_ADDR_CFG);	/* get addr cfg */
#ifndef	ORIGINAL
    sc->if_port = k >> 14;
#endif	/* ORIGINAL */
#ifdef ZP_DEBUG
    printf("EEPROM data = 0x%x\n", k);
#endif
    k = (k & 0x1f) * 0x10 + 0x200;	/* decode base addr. */
#ifdef	MACH_KERNEL
    if (k != (u_short) dev->address)
#else	/* MACH_KERNEL */
    if (k != (u_short) isa_dev->id_iobase)
#endif	/* MACH_KERNEL */
    {
	if (!re_init_flag) {
	    re_init_flag++;
	    goto re_init;
	}
	return (0);
    }
    k = read_eeprom_data(BASE, EEPROM_RESOURCE_CFG);

    k >>= 12;

#ifdef	MACH_KERNEL
#ifdef	ZP_DEBUG
    printf("!!!IRQ Mach config: %d, board config: %d!!!\n",
	   dev->sysdep1, (k == 2) ? 9 : k);
#ifdef	MACH_KERNEL
    cngetc();
#endif	/* MACH_KERNEL */
#endif	/* ZP_DEBUG */
    if (dev->sysdep1 != ((k == 2) ? 9 : k))
#else	/* MACH_KERNEL */
    if (isa_dev->id_irq != (1 << ((k == 2) ? 9 : k)))
#endif	/* MACH_KERNEL */
#ifdef	ZP_DEBUG
    {
	printf("Unmatched !!!!!!\n");
	return (0);
    }
#else	/* ZP_DEBUG */
	return (0);
#endif	/* ZP_DEBUG */

#if 0
    outb(id_port, ACTIVATE_ADAPTER_TO_CONFIG);
#else
    outb(BASE, ACTIVATE_ADAPTER_TO_CONFIG);
#endif

#ifdef	MACH_KERNEL
    dev->name = zp_name;
    return (1);
#else	/* MACH_KERNEL */

    /* information for reconfiguration */
    sc->last_alive = 0;
    sc->last_up = 0;
    sc->slot = slot;

    return (0x10);	/* 16 bytes of I/O space used. */
#endif	/* MACH_KERNEL */
}

#if NAPM > 0
static int
zp_suspend(isa_dev)
    struct isa_device *isa_dev;
{
    struct zp_softc *sc = &zp_softc[isa_dev->id_unit];

    pcic_power_off(sc->slot);
    return 0;
}

static int
zp_resume(isa_dev)
    struct isa_device *isa_dev;
{
    prev_slot = 0;
    reconfig_isadev(isa_dev, &net_imask);
    return 0;
}
#endif	/* NAPM > 0 */


/*
 * Install interface into kernel networking data structures
 */

#ifdef	MACH_KERNEL
void
zpattach(dev)
    struct bus_device *dev;
#else	/* MACH_KERNEL */
int
zpattach(isa_dev)
    struct isa_device *isa_dev;
#endif	/* MACH_KERNEL */
{
#ifdef	MACH_KERNEL
    zp_softc_t     *sc = &zp_softc[dev->unit];
    struct ifnet   *ifp = &(sc->ds_if);
#else	/* MACH_KERNEL */
    struct zp_softc *sc = &zp_softc[isa_dev->id_unit];
    struct ifnet   *ifp = &sc->arpcom.ac_if;
#endif	/* MACH_KERNEL */
    u_short         i;
    struct ifaddr  *ifa;
    struct sockaddr_dl *sdl;
    int             pl;

#ifdef	ZP_DEBUG
    printf("### zpattach ####\n");
#ifdef	MACH_KERNEL
    cngetc();
#endif	/* MACH_KERNEL */
#endif	/* ZP_DEBUG */

    /* PCMCIA card can be offlined. Reconfiguration is required */
    if (isa_dev->id_reconfig) {
	if (!isa_dev->id_alive && sc->last_alive) {
	    pl = splimp();
	    sc->last_up = (ifp->if_flags & IFF_UP);
	    if_down(ifp);
	    splx(pl);
	    sc->last_alive = 0;
	}
	if (isa_dev->id_alive && !sc->last_alive) {
	    zpreset(isa_dev->id_unit);
	    if (sc->last_up) {
		pl = splimp();
		if_up(ifp);
		splx(pl);
	    }
	    sc->last_alive = 1;
	}
	return 1;
    } else {
	sc->last_alive = 1;
    }


#ifdef	MACH_KERNEL
    printf(", port = %x, spl = %d, pic = %d. ",
	   dev->address, dev->sysdep, dev->sysdep1);

    take_dev_irq(dev);
    sc->ep_io_addr = dev->address;
#else	/* MACH_KERNEL */
    sc->ep_io_addr = isa_dev->id_iobase;
    printf("zp%d: ", isa_dev->id_unit);
#endif	/* MACH_KERNEL */

    sc->ep_connectors = 0;

#ifdef	MACH_KERNEL
    i = inw(sc->ep_io_addr + EP_W0_CONFIG_CTRL);
#else	/* MACH_KERNEL */
    i = inw(isa_dev->id_iobase + EP_W0_CONFIG_CTRL);
#endif	/* MACH_KERNEL */

#ifdef	ZP_DEBUG
    {
	short           if_port;
	if_port = read_eeprom_data(BASE, 8) >> 14;
	sc->if_port = if_port;
	printf("Linux select:%x\n", if_port);
#ifdef	MACH_KERNEL
	cngetc();
#endif	/* MACH_KERNEL */
    }

    printf("SELECT connectors:%x\n", i);
#endif	/* ZP_DEBUG */

    if (i & IS_AUI) {
	printf("aui");
	sc->ep_connectors |= AUI;
    }
    if (i & IS_BNC) {
	if (sc->ep_connectors)
	    printf("/");
	printf("bnc");
	sc->ep_connectors |= BNC;
    }
    if (i & IS_UTP) {
	if (sc->ep_connectors)
	    printf("/");
	printf("utp");
	sc->ep_connectors |= UTP;
    }
    if (!sc->ep_connectors)
	printf("no connectors!");

#ifdef	MACH_KERNEL
#ifndef	ORIGINAL
    printf(":%s was selected.\n", if_names[sc->if_port]);
#ifdef	ZP_DEBUG
    cngetc();
#endif	/* ZP_DEBUG */
#endif	/* ORIGINAL */
#endif	/* MACH_KERNEL */

    GO_WINDOW(0);
    {
	short           tmp_addr[3];
	int             i;
	for (i = 0; i < 3; i++) {
	    tmp_addr[i] = htons(read_eeprom_data(BASE, i));
	}
#ifdef	MACH_KERNEL
	bcopy(tmp_addr, sc->ds_addr, 6);
#else	/* MACH_KERNEL */
	bcopy(tmp_addr, sc->arpcom.ac_enaddr, 6);
#endif	/* MACH_KERNEL */
    }

#ifdef	MACH_KERNEL
    printf("id [%x:%x:%x:%x:%x:%x]",
	   sc->ds_addr[0], sc->ds_addr[1], sc->ds_addr[2],
	   sc->ds_addr[3], sc->ds_addr[4], sc->ds_addr[5]);
    printf(" address %s\n", ether_sprintf(sc->ds_addr));
#ifdef	ZP_DEBUG
    cngetc();
#endif	/* ZP_DEBUG */
#else	/* MACH_KERNEL */
    printf(" address %s\n", ether_sprintf(sc->arpcom.ac_enaddr));
#endif	/* MACH_KERNEL */

    ifp->if_mtu = ETHERMTU;
#ifdef	MACH_KERNEL
    ifp->if_flags = IFF_BROADCAST;
    ifp->if_unit = dev->unit;
    ifp->if_header_size = sizeof(struct ether_header);
    ifp->if_header_format = HDR_ETHERNET;
    ifp->if_address_size = 6;
    ifp->if_address = (char *) &sc->ds_addr[0];

#define	IFF_ALTPHYS	0x8000

#ifdef	ORIGINAL
    /*
     * This is a temporary. Mach can not select link with ifconfig, so I
     * select AUI statically.
     */
    ifp->if_flags |= IFF_ALTPHYS;
#else	/* ORIGINAL */
    /*
     * Select connector according to board setting.
     */
    if (sc->if_port != 3) {
	ifp->if_flags |= IFF_ALTPHYS;
    }
#endif	/* ORIGINAL */

    if_init_queues(ifp);
    sc->attached = 1;

#else	/* MACH_KERNEL */
    ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX;
    ifp->if_unit = isa_dev->id_unit;
    ifp->if_name = "zp";
    ifp->if_init = zpinit;
    ifp->if_output = ether_output;
    ifp->if_start = zpstart;
    ifp->if_ioctl = zpioctl;
    ifp->if_watchdog = zpwatchdog;
    /*
     * Select connector according to board setting.
     */
#if defined(__NetBSD__) || defined(__FreeBSD__)
#if 0
    if (sc->if_port != 3) {
	ifp->if_flags |= IFF_LINK0;
    }
#else
    ifp->if_flags |= IFF_LINK0;
#endif
#endif	/* __NetBSD__ || __FreeBSD__ */

    if_attach(ifp);
#endif	/* MACH_KERNEL */

#ifndef	MACH_KERNEL
    /*
     * Fill the hardware address into ifa_addr if we find an AF_LINK entry.
     * We need to do this so bpf's can get the hardware addr of this card.
     * netstat likes this too!
     */
    ifa = ifp->if_addrlist;
    while ((ifa != 0) && (ifa->ifa_addr != 0) &&
	   (ifa->ifa_addr->sa_family != AF_LINK))
	ifa = ifa->ifa_next;

    if ((ifa != 0) && (ifa->ifa_addr != 0)) {
	sdl = (struct sockaddr_dl *) ifa->ifa_addr;
	sdl->sdl_type = IFT_ETHER;
	sdl->sdl_alen = ETHER_ADDR_LEN;
	sdl->sdl_slen = 0;
	bcopy(sc->arpcom.ac_enaddr, LLADDR(sdl), ETHER_ADDR_LEN);
    }
#if NBPFILTER > 0
    bpfattach(&sc->bpf, ifp, DLT_EN10MB, sizeof(struct ether_header));
#endif
#if NAPM > 0
    sc->s_hook.ah_fun = zp_suspend;
    sc->s_hook.ah_arg = (void *) isa_dev;
    sc->s_hook.ah_name = "3Com PCMCIA Etherlink III 3C589";
    sc->s_hook.ah_order = APM_MID_ORDER;
    apm_hook_establish(APM_HOOK_SUSPEND, &sc->s_hook);
    sc->r_hook.ah_fun = zp_resume;
    sc->r_hook.ah_arg = (void *) isa_dev;
    sc->r_hook.ah_name = "3Com PCMCIA Etherlink III 3C589";
    sc->r_hook.ah_order = APM_MID_ORDER;
    apm_hook_establish(APM_HOOK_RESUME, &sc->r_hook);
#endif	/* NAPM > 0 */
    return 1;
#endif	/* MACH_KERNEL */
}

/*
 * The order in here seems important. Otherwise we may not receive
 * interrupts. ?!
 */
void
zpinit(unit)
    int             unit;
{
    register struct zp_softc *sc = &zp_softc[unit];
#ifdef	MACH_KERNEL
    register struct ifnet *ifp = &sc->ds_if;
#else	/* MACH_KERNEL */
    register struct ifnet *ifp = &sc->arpcom.ac_if;
#endif	/* MACH_KERNEL */
    int             s, i;

#ifdef	ZP_DEBUG
    printf("### zpinit ####\n");
#endif	/* ZP_DEBUG */

#ifndef	MACH_KERNEL
    if (ifp->if_addrlist == (struct ifaddr *) 0)
	return;
#endif	/* MACH_KERNEL */

    s = splimp();
    while (inw(BASE + EP_STATUS) & S_COMMAND_IN_PROGRESS);

    GO_WINDOW(0);

    /* Disable the card */
    outw(BASE + EP_W0_CONFIG_CTRL, 0);

    /* Enable the card */
    outw(BASE + EP_W0_CONFIG_CTRL, ENABLE_DRQ_IRQ);

    GO_WINDOW(2);

    /* Reload the ether_addr. */
    for (i = 0; i < 6; i++)
#ifdef	MACH_KERNEL
	outb(BASE + EP_W2_ADDR_0 + i, sc->ds_addr[i]);
#else	/* MACH_KERNEL */
	outb(BASE + EP_W2_ADDR_0 + i, sc->arpcom.ac_enaddr[i]);
#endif	/* MACH_KERNEL */

    outw(BASE + EP_COMMAND, RX_RESET);
    outw(BASE + EP_COMMAND, TX_RESET);

    /* Window 1 is operating window */
    GO_WINDOW(1);
    for (i = 0; i < 31; i++)
	inb(BASE + EP_W1_TX_STATUS);

    /* get rid of stray intr's */
    outw(BASE + EP_COMMAND, ACK_INTR | 0xff);

    outw(BASE + EP_COMMAND, SET_RD_0_MASK | S_CARD_FAILURE | S_RX_COMPLETE |
	 S_TX_COMPLETE | S_TX_AVAIL);
    outw(BASE + EP_COMMAND, SET_INTR_MASK | S_CARD_FAILURE | S_RX_COMPLETE |
	 S_TX_COMPLETE | S_TX_AVAIL);

#ifndef	ORIGINAL
#ifndef IFF_MULTICAST
#define	IFF_MULTICAST	0x10000
#endif

#ifdef MACH_KERNEL
    outw(BASE + EP_COMMAND, SET_RX_FILTER | FIL_INDIVIDUAL |
	 ((sc->ds_if.if_flags & IFF_MULTICAST) ? FIL_GROUP : 0) |
	 FIL_BRDCST |
	 ((sc->ds_if.if_flags & IFF_PROMISC) ? FIL_ALL : 0));
#else
    outw(BASE + EP_COMMAND, SET_RX_FILTER | FIL_INDIVIDUAL |
	 ((sc->arpcom.ac_if.if_flags & IFF_MULTICAST) ? FIL_GROUP : 0) |
	 FIL_BRDCST |
	 ((sc->arpcom.ac_if.if_flags & IFF_PROMISC) ? FIL_ALL : 0));
#endif	/* MACH_KERNEL */
#else	/* ORIGINAL */
    outw(BASE + EP_COMMAND, SET_RX_FILTER | FIL_INDIVIDUAL |
	 FIL_GROUP | FIL_BRDCST);
#endif	/* ORIGINAL */
    /*
     * you can `ifconfig (link0|-link0) ep0' to get the following behaviour:
     * -link0	disable AUI/UTP. enable BNC. link0	disable BNC. enable
     * AUI. if the card has a UTP connector, that is enabled too. not sure,
     * but it seems you have to be careful to not plug things into both AUI &
     * UTP.
     */

#if defined(__NetBSD__) || defined(__FreeBSD__)
    if (!(ifp->if_flags & IFF_LINK0) && (sc->ep_connectors & BNC)) {
#else
    if (!(ifp->if_flags & IFF_ALTPHYS) && (sc->ep_connectors & BNC)) {
#endif
#ifdef ZP_DEBUG
	printf("START TRANCEIVER");
#endif	/* ZP_DEBUG */
        GO_WINDOW(0);
        /* set the xcvr */
        outw(BASE + EP_W0_ADDRESS_CFG, 3 << 14);
        GO_WINDOW(2);
        outw(BASE + EP_COMMAND, START_TRANSCEIVER);
        GO_WINDOW(1);
    }
#if defined(__NetBSD__) || defined(__FreeBSD__)
    if ((ifp->if_flags & IFF_LINK0) && (sc->ep_connectors & UTP)) {
#else
    if ((ifp->if_flags & IFF_ALTPHYS) && (sc->ep_connectors & UTP)) {
#endif
#ifdef ZP_DEBUG
	printf("ENABLE UTP");
#endif	/* ZP_DEBUG */
	GO_WINDOW(4);
	outw(BASE + EP_W4_MEDIA_TYPE, ENABLE_UTP);
	GO_WINDOW(1);
    }
    outw(BASE + EP_COMMAND, RX_ENABLE);
    outw(BASE + EP_COMMAND, TX_ENABLE);

    ifp->if_flags |= IFF_RUNNING;
#ifndef	MACH_KERNEL
    ifp->if_flags &= ~IFF_OACTIVE;	/* just in case */
#endif	/* MACH_KERNEL */
    sc->tx_start_thresh = 20;	/* probably a good starting point. */
#ifndef	MACH_KERNEL
    /*
     * Store up a bunch of mbuf's for use later. (MAX_MBS). First we free up
     * any that we had in case we're being called from intr or somewhere
     * else.
     */
    sc->last_mb = 0;
    sc->next_mb = 0;
    zpmbuffill(sc);
#endif	/* MACH_KERNEL */
#ifdef	MACH_KERNEL
#if 0	/* seiji */
    sc->tbusy = 0;
#endif
    zpstart(unit);
#else	/* MACH_KERNEL */
    zpstart(ifp);
#endif	/* MACH_KERNEL */
    splx(s);
#ifdef	ZP_DEBUG
    printf("### zpinit done ####\n");
#endif	/* ZP_DEBUG */
}

static const char padmap[] = {0, 3, 2, 1};

#ifdef	MACH_KERNEL
void
zpstart(unit)
    int             unit;
#else	/* MACH_KERNEL */
void
zpstart(ifp)
    struct ifnet   *ifp;
#endif	/* MACH_KERNEL */
{
#ifdef	MACH_KERNEL
    register struct zp_softc *sc = &zp_softc[unit];
    struct ifnet   *ifp = &sc->ds_if;
    io_req_t        m;
#else	/* MACH_KERNEL */
    register struct zp_softc *sc = &zp_softc[ifp->if_unit];
    struct mbuf    *m, *top;
#endif	/* MACH_KERNEL */

    int             s, len, pad;

#ifdef	ZP_DEBUG
    printf("### zpstart ####\n");
#endif	/* ZP_DEBUG */
#ifdef	ZP_DEBUG
    printf("head1 = 0x%x\n", sc->arpcom.ac_if.if_snd.ifq_head);
    printf("BASE = 0x%x\n", BASE);
#endif

    s = splimp();

#ifndef	MACH_KERNEL
    if (sc->arpcom.ac_if.if_flags & IFF_OACTIVE) {
	splx(s);
#ifdef	ZP_DEBUG
	printf("### zpstart oactive ####\n");
#endif	/* ZP_DEBUG */
	return;
    }
#endif	/* MACH_KERNEL */

startagain:

#ifdef	MACH_KERNEL

#if 0	/* seiji */
    if (sc->tbusy) {
	return;
    }
#endif
    /* Sneak a peek at the next packet */
    m = (io_req_t)
	((ifp->if_snd.ifq_head.next == (queue_t) & (ifp->if_snd.ifq_head)) ?
	 0 : ifp->if_snd.ifq_head.next);
    if (m == 0) {
	splx(s);
#ifdef	ZP_DEBUG
	printf("### zpstart none data 1 ####\n");
#endif	/* ZP_DEBUG */
	return;
    }
#if 0
    IF_DEQUEUE(&ifp->if_snd, m);
    if (NULL == m) {
	return;
    }
#endif

#if	0	/* seiji */
    sc->tbusy++;
    zp_cntrs[unit].xmt++;
#endif
    len = m->io_count;
#else	/* MACH_KERNEL */

    /* Sneak a peek at the next packet */
    m = sc->arpcom.ac_if.if_snd.ifq_head;
#ifdef	ZP_DEBUG
    printf("head2 = 0x%x\n", sc->arpcom.ac_if.if_snd.ifq_head);
#endif
    if (m == 0) {
	splx(s);
#ifdef	ZP_DEBUG
	printf("### zpstart none data 2 ####\n");
#endif	/* EP_DEBUG */
	return;
    }
#if  0
    len = m->m_pkthdr.len;
#else
    for (len = 0, top = m; m; m = m->m_next)
	len += m->m_len;
#endif
#endif	/* MACH_KERNEL */

    pad = padmap[len & 3];

    /*
     * The 3c509 automatically pads short packets to minimum ethernet length,
     * but we drop packets that are too large. Perhaps we should truncate
     * them instead?
     */
    if (len + pad > ETHER_MAX_LEN) {
	/* packet is obviously too large: toss it */
#ifdef	MACH_KERNEL
	++(ifp->if_oerrors);
	IF_DEQUEUE(&(ifp->if_snd), m);
	iodone(m);

#else	/* MACH_KERNEL */
	++sc->arpcom.ac_if.if_oerrors;
	IF_DEQUEUE(&sc->arpcom.ac_if.if_snd, m);
	m_freem(m);
#endif	/* MACH_KERNEL */
	goto readcheck;
    }
#if 1
    if (inw(BASE + EP_W1_FREE_TX) < len + pad + 4) {
	/* no room in FIFO */
	outw(BASE + EP_COMMAND, SET_TX_AVAIL_THRESH | (len + pad + 4));
#ifndef	MACH_KERNEL
	sc->arpcom.ac_if.if_flags |= IFF_OACTIVE;
#endif	/* MACH_KERNEL */
	splx(s);

#ifdef	ZP_DEBUG
	printf("### zpstart no room ####\n");
#endif	/* EP_DEBUG */
	return;
    }
#else
    {
	int             i;
	if ((i = inw(BASE + EP_W1_FREE_TX)) < len + pad + 4) {
	    printf("BASE + EP_W1_FREE_TX = 0x%x\n", i);
	    /* no room in FIFO */
	    outw(BASE + EP_COMMAND, SET_TX_AVAIL_THRESH | (len + pad + 4));
#ifndef	MACH_KERNEL
	    sc->arpcom.ac_if.if_flags |= IFF_OACTIVE;
#endif	/* MACH_KERNEL */
	    splx(s);

	    printf("### zpstart no room ####\n");
	    return;
	}
	printf("BASE + EP_W1_FREE_TX = 0x%x\n", i);
    }
#endif
#ifdef	MACH_KERNEL
    IF_DEQUEUE(&(ifp->if_snd), m);
#else	/* MACH_KERNEL */
    IF_DEQUEUE(&sc->arpcom.ac_if.if_snd, m);
#endif	/* MACH_KERNEL */

    if (m == 0) {	/* not really needed */
	splx(s);
#ifdef	ZP_DEBUG
	printf("### zpstart ??? ####\n");
#endif	/* ZP_DEBUG */
	return;
    }
    outw(BASE + EP_COMMAND, SET_TX_START_THRESH |
	 (len / 4 + sc->tx_start_thresh));

    outw(BASE + EP_W1_TX_PIO_WR_1, len);
    outw(BASE + EP_W1_TX_PIO_WR_1, 0xffff);	/* Second dword meaningless */

#ifdef	MACH_KERNEL
    if (sc->bus32bit) {
	loutl(BASE + EP_W1_TX_PIO_WR_1, m->io_data, len / 4);
	if (len & 3)
	    loutb(BASE + EP_W1_TX_PIO_WR_1,
		  m->io_data + (len & ~3), len & 3);
    } else {
	loutw(BASE + EP_W1_TX_PIO_WR_1, m->io_data, len / 2);
	if (len & 1)
	    outb(BASE + EP_W1_TX_PIO_WR_1, *(m->io_data + len - 1));
    }
#else	/* MACH_KERNEL */
    for (top = m; m != 0; m = m->m_next) {
	if (sc->bus32bit) {
	    outsl(BASE + EP_W1_TX_PIO_WR_1, mtod(m, caddr_t),
		  m->m_len / 4);
	    if (m->m_len & 3)
		outsb(BASE + EP_W1_TX_PIO_WR_1,
		      mtod(m, caddr_t) + m->m_len / 4,
		      m->m_len & 3);
	} else {
#ifdef ZP_DEBUG
	    printf("Output len = %d\n", m->m_len);
#endif	/* ZP_DEBUG */
	    outsw(BASE + EP_W1_TX_PIO_WR_1, mtod(m, caddr_t), m->m_len / 2);
	    if (m->m_len & 1)
		outb(BASE + EP_W1_TX_PIO_WR_1,
		     *(mtod(m, caddr_t) + m->m_len - 1));
	}
    }
#endif	/* MACH_KERNEL */
    while (pad--)
	outb(BASE + EP_W1_TX_PIO_WR_1, 0);	/* Padding */

#ifndef	MACH_KERNEL
#if NBPFILTER > 0
    if (sc->bpf) {
#if 0
	u_short         etype;
	int             off, datasize, resid;
	struct ether_header *eh;
	struct trailer_header {
	    u_short         ether_type;
	    u_short         ether_residual;
	}               trailer_header;
	char            ether_packet[ETHER_MAX_LEN];
	char           *ep;

	ep = ether_packet;

	/*
	 * We handle trailers below: Copy ether header first, then residual
	 * data, then data. Put all this in a temporary buffer 'ether_packet'
	 * and send off to bpf. Since the system has generated this packet,
	 * we assume that all of the offsets in the packet are correct; if
	 * they're not, the system will almost certainly crash in m_copydata.
	 * We make no assumptions about how the data is arranged in the mbuf
	 * chain (i.e. how much data is in each mbuf, if mbuf clusters are
	 * used, etc.), which is why we use m_copydata to get the ether
	 * header rather than assume that this is located in the first mbuf.
	 */
	/* copy ether header */
	m_copydata(top, 0, sizeof(struct ether_header), ep);
	eh = (struct ether_header *) ep;
	ep += sizeof(struct ether_header);
	eh->ether_type = etype = ntohs(eh->ether_type);
	if (etype >= ETHERTYPE_TRAIL &&
	    etype < ETHERTYPE_TRAIL + ETHERTYPE_NTRAILER) {
	    datasize = ((etype - ETHERTYPE_TRAIL) << 9);
	    off = datasize + sizeof(struct ether_header);

	    /* copy trailer_header into a data structure */
	    m_copydata(top, off, sizeof(struct trailer_header),
		       (caddr_t) & trailer_header.ether_type);

	    /* copy residual data */
	    resid = trailer_header.ether_residual -
		sizeof(struct trailer_header);
	    resid = ntohs(resid);
	    m_copydata(top, off + sizeof(struct trailer_header),
		       resid, ep);
	    ep += resid;

	    /* copy data */
	    m_copydata(top, sizeof(struct ether_header),
		       datasize, ep);
	    ep += datasize;

	    /* restore original ether packet type */
	    eh->ether_type = trailer_header.ether_type;

	    bpf_tap(sc->bpf, ether_packet, ep - ether_packet);
	} else
	    bpf_mtap(sc->bpf, top);
#endif

	bpf_mtap(sc->bpf, top);
    }
#endif
#endif	/* MACH_KERNEL */

#ifdef	MACH_KERNEL
    ++(ifp->if_opackets);
    iodone(m);
#else	/* MACH_KERNEL */
    m_freem(top);
    ++sc->arpcom.ac_if.if_opackets;
#endif	/* MACH_KERNEL */
    /*
     * Is another packet coming in? We don't want to overflow the tiny RX
     * fifo.
     */
readcheck:
    if (inw(BASE + EP_W1_RX_STATUS) & RX_BYTES_MASK) {
	splx(s);
#ifdef	ZP_DEBUG
	printf("### zpstart done ####\n");
#endif	/* ZP_DEBUG */
	return;
    }
#ifdef	ZP_DEBUG2
    printf("### zpstart startagain ####\n");
#endif	/* ZP_DEBUG */
    goto startagain;
}

#ifdef	MACH_KERNEL
int
zpopen(dev, flag)
    dev_t           dev;
    int             flag;
{
    register int    unit = minor(dev);

#ifdef	ZP_DEBUG
    printf("### zpopen ####\n");
#endif	/* ZP_DEBUG */

    if (unit < 0 || unit >= NZP || zp_softc[unit].attached == 0) {
	return (ENXIO);
    }
    zp_softc[unit].ds_if.if_flags |= IFF_UP;
    zpinit(unit);
    return (0);
}

int
zpoutput(dev, ior)
    dev_t           dev;
    io_req_t        ior;
{
    register int    unit = minor(dev);
    io_return_t     result;

#ifdef	ZP_DEBUG
    printf("### zpoutput ####\n");
#endif	/* ZP_DEBUG */

    if (unit < 0 || unit >= NZP || zp_softc[unit].attached == 0) {
	return (ENXIO);
    }
    result = net_write(&zp_softc[unit].ds_if, zpstart, ior);
#ifdef	ZP_DEBUG
    printf("### zpoutput done ####\n");
#endif	/* ZP_DEBUG */
    return (result);
}

int
zpsetinput(dev, receive_port, priority, filter, filter_count)
    dev_t           dev;
    mach_port_t     receive_port;
    int             priority;
    filter_t        filter[];
    unsigned int    filter_count;
{
    register int    unit = minor(dev);

#ifdef	ZP_DEBUG
    printf("### zpsetinput ####\n");
#endif	/* ZP_DEBUG */

    if (unit < 0 || unit >= NZP || zp_softc[unit].attached == 0) {
	return (ENXIO);
    }
    return (net_set_filter(&zp_softc[unit].ds_if,
			   receive_port, priority, filter,
			   filter_count));
}

#endif	/* MACH_KERNEL */

#ifdef	MACH_KERNEL
int
#else	/* MACH_KERNEL */
void
#endif	/* MACH_KERNEL */
zpintr(unit)
    int             unit;
{
    int             status, i;
    register struct zp_softc *sc = &zp_softc[unit];

#ifdef	MACH_KERNEL
    struct ifnet   *ifp = &sc->ds_if;
#else	/* MACH_KERNEL */
    struct ifnet   *ifp = &sc->arpcom.ac_if;
#endif	/* MACH_KERNEL */

#ifdef	ZP_DEBUG
    printf("### zpintr ####\n");
#endif	/* ZP_DEBUG */

    status = 0;
checkintr:
    status = inw(BASE + EP_STATUS) &
	(S_TX_COMPLETE | S_TX_AVAIL | S_RX_COMPLETE | S_CARD_FAILURE);
#ifndef	ORIGINAL
checkintr2:
#endif	/* ORIGINAL */
    if (status == 0) {
	/* No interrupts. */
	outw(BASE + EP_COMMAND, C_INTR_LATCH);
#ifdef	ZP_DEBUG
	printf("### zpintr done ####\n");
#endif	/* ZP_DEBUG */

#ifndef	ORIGINAL
	if (status = inw(BASE + EP_STATUS) &
	    (S_TX_COMPLETE | S_TX_AVAIL | S_RX_COMPLETE |
	     S_CARD_FAILURE)) {
	    goto checkintr2;
	}
#endif	/* ORIGINAL */

#ifdef	MACH_KERNEL
	return (0);
#else	/* MACH_KERNEL */
	return;
#endif	/* MACH_KERNEL */
    }
    /* important that we do this first. */
    outw(BASE + EP_COMMAND, ACK_INTR | status);

    if (status & S_TX_AVAIL) {
	status &= ~S_TX_AVAIL;
	inw(BASE + EP_W1_FREE_TX);
#ifdef	MACH_KERNEL
	zpstart(unit);
#else	/* MACH_KERNEL */
	sc->arpcom.ac_if.if_flags &= ~IFF_OACTIVE;
	zpstart(&sc->arpcom.ac_if);
#endif	/* MACH_KERNEL */

    }
    if (status & S_RX_COMPLETE) {
	status &= ~S_RX_COMPLETE;
	zpread(sc);
    }
    if (status & S_CARD_FAILURE) {
	printf("zp%d: reset (status: %x)\n", unit, status);
	outw(BASE + EP_COMMAND, C_INTR_LATCH);
	zpinit(unit);
#ifdef	ZP_DEBUG
	printf("### zpintr error ####\n");
#endif	/* ZP_DEBUG */
#ifdef	MACH_KERNEL
	return (0);
#else	/* MACH_KERNEL */
	return;
#endif	/* MACH_KERNEL */
    }
    if (status & S_TX_COMPLETE) {
	status &= ~S_TX_COMPLETE;
	/*
	 * We need to read TX_STATUS until we get a 0 status in order to turn
	 * off the interrupt flag.
	 */
	while ((i = inb(BASE + EP_W1_TX_STATUS)) & TXS_COMPLETE) {
	    outw(BASE + EP_W1_TX_STATUS, 0x0);
#if ZE_DEBUG
	    printf("EP_W1_TX_STATUS = 0x%x\n", i);
#endif
	    if (i & (TXS_MAX_COLLISION | TXS_JABBER | TXS_UNDERRUN)) {
		if (i & TXS_MAX_COLLISION)
#ifdef	MACH_KERNEL
		    ++(ifp->if_collisions);
#else	/* MACH_KERNEL */
		    ++sc->arpcom.ac_if.if_collisions;
#endif	/* MACH_KERNEL */
		if (i & (TXS_JABBER | TXS_UNDERRUN)) {
		    outw(BASE + EP_COMMAND, TX_RESET);
		    if (i & TXS_UNDERRUN) {
			if (sc->tx_start_thresh < ETHER_MAX_LEN) {
			    sc->tx_start_thresh += 20;
			    outw(BASE + EP_COMMAND,
				 SET_TX_START_THRESH |
				 sc->tx_start_thresh);
			}
		    }
		}
		outw(BASE + EP_COMMAND, TX_ENABLE);
#ifdef	MACH_KERNEL
		++(ifp->if_oerrors);
#else	/* MACH_KERNEL */
		++sc->arpcom.ac_if.if_oerrors;
#endif	/* MACH_KERNEL */
	    }
	}
#ifdef	MACH_KERNEL
	zpstart(unit);
#else	/* MACH_KERNEL */
	zpstart(ifp);
#endif	/* MACH_KERNEL */
    }
    goto checkintr;
}

void
zpread(sc)
    register struct zp_softc *sc;
{
    struct ether_header *eh;
#ifdef	MACH_KERNEL
    struct ether_header eth;
    ipc_kmsg_t      new_kmsg;
    struct packet_header *pkt;
    int             totlen;
#else	/* MACH_KERNEL */
    struct mbuf    *mcur, *m, *m0, *top;
    int             totlen, lenthisone;
    int             save_totlen;
    int             off;
#endif	/* MACH_KERNEL */

#ifdef	ZP_DEBUG
    printf("### zpread ####\n");
#endif	/* ZP_DEBUG */

    totlen = inw(BASE + EP_W1_RX_STATUS);
#ifndef	MACH_KERNEL
    off = 0;
    top = 0;
#endif	/* MACH_KERNEL */

    if (totlen & ERR_RX) {
#ifdef	MACH_KERNEL
	++(sc->ds_if.if_ierrors);
#else	/* MACH_KERNEL */
	++sc->arpcom.ac_if.if_ierrors;
#endif	/* MACH_KERNEL */
	goto out;
    }
#ifdef	MACH_KERNEL
    totlen &= RX_BYTES_MASK;	/* Lower 11 bits = RX bytes. */
#else	/* MACH_KERNEL */
    save_totlen = totlen &= RX_BYTES_MASK;	/* Lower 11 bits = RX bytes. */
#endif	/* MACH_KERNEL */

#ifdef	MACH_KERNEL
    /* Get Etherheader */

    linw(BASE + EP_W1_RX_PIO_RD_1,
	 (char *) &eth, sizeof(struct ether_header) / 2);
    totlen -= sizeof(struct ether_header);

    new_kmsg = net_kmsg_get();
    if (new_kmsg == IKM_NULL) {
	/* Drop the packet */
	++(sc->ds_if.if_rcvdrops);
	/*
	 * Is this true ? Do I have to remove the packet ? Maybe out discard
	 * incoming packet.
	 */
	goto out;
    }
    eh = (struct ether_header *) (&net_kmsg(new_kmsg)->header[0]);
    pkt = (struct packet_header *) (&net_kmsg(new_kmsg)->packet[0]);

    *eh = eth;	/* Is this true ? */

    if (sc->bus32bit) {
	linl(BASE + EP_W1_RX_PIO_RD_1, (char *) (pkt + 1), totlen / 4);
	if (totlen & 3)
	    linb(BASE + EP_W1_RX_PIO_RD_1,
		 (char *) (pkt + 1) + (totlen & ~3), totlen & 3);
    } else {
	linw(BASE + EP_W1_RX_PIO_RD_1,
	     (char *) (pkt + 1), totlen / 2);
	if (totlen & 1)
	    *((char *) (pkt + 1) + totlen - 1) =
		inb(BASE + EP_W1_RX_PIO_RD_1);
    }

    outw(BASE + EP_COMMAND, RX_DISCARD_TOP_PACK);
    while (inw(BASE + EP_STATUS) & S_COMMAND_IN_PROGRESS);
    ++(sc->ds_if.if_ipackets);

    pkt->type = eh->ether_type;
    pkt->length = totlen + sizeof(struct packet_header);

    net_packet(&(sc->ds_if), new_kmsg, pkt->length,
	       ethernet_priority(new_kmsg, pkt->type));

#ifdef	ZP_DEBUG
    printf("### zpread done ####\n");
#endif	/* ZP_DEBUG */

    return;

#else	/* MACH_KERNEL */
    m = sc->mb[sc->next_mb];
    sc->mb[sc->next_mb] = 0;

    if (m == 0) {
	MGETHDR(m, M_DONTWAIT, MT_DATA);
	if (m == 0)
	    goto out;
    } else {
	/* Convert one of our saved mbuf's */
	sc->next_mb = (sc->next_mb + 1) % MAX_MBS;
	m->m_data = m->m_pktdat;
	m->m_flags = M_PKTHDR;
    }

    top = m0 = m;	/* We assign top so we can "goto out" */
#define EROUND  ((sizeof(struct ether_header) + 3) & ~3)
#define EOFF    (EROUND - sizeof(struct ether_header))
    m0->m_data += EOFF;
    /* Read what should be the header. */
    insw(BASE + EP_W1_RX_PIO_RD_1,
	 mtod(m0, caddr_t), sizeof(struct ether_header) / 2);
    m->m_len = sizeof(struct ether_header);
    totlen -= sizeof(struct ether_header);
    /*
     * mostly deal with trailer here.  (untested) We do this in a couple of
     * parts.  First we check for a trailer, if we have one we convert the
     * mbuf back to a regular mbuf and set the offset and subtract
     * sizeof(struct ether_header) from the pktlen. After we've read the
     * packet off the interface (all except for the trailer header, we then
     * get a header mbuf, read the trailer into it, and fix up the mbuf
     * pointer chain.
     */
    eh = mtod(m, struct ether_header *);
#if 0	/* by nor@aecl.ntt.jp */
    eh->ether_type = etype = ntohs((u_short) eh->ether_type);
    if (etype >= ETHERTYPE_TRAIL &&
	etype < ETHERTYPE_TRAIL + ETHERTYPE_NTRAILER) {
	m->m_data = m->m_dat;	/* Convert back to regular mbuf.  */
	m->m_flags = 0;	/* This sucks but non-trailers are the norm */
	off = (etype - ETHERTYPE_TRAIL) * 512;
	if (off >= ETHERMTU) {
	    m_freem(m);
	    return;	/* sanity */
	}
	totlen -= sizeof(struct ether_header);	/* We don't read the trailer */
	m->m_data += 2 * sizeof(u_short);	/* Get rid of type & len */
    }
#endif	/* by nor@aecl.ntt.jp */
    while (totlen > 0) {
	lenthisone = min(totlen, M_TRAILINGSPACE(m));
	if (lenthisone == 0) {	/* no room in this one */
	    mcur = m;
	    m = sc->mb[sc->next_mb];
	    sc->mb[sc->next_mb] = 0;
	    if (!m) {
		MGET(m, M_DONTWAIT, MT_DATA);
		if (m == 0)
		    goto out;
	    } else {
		timeout(zpmbuffill, sc, 0);
		sc->next_mb = (sc->next_mb + 1) % MAX_MBS;
	    }
	    if (totlen >= MINCLSIZE)
		MCLGET(m, M_DONTWAIT);
	    m->m_len = 0;
	    mcur->m_next = m;
	    lenthisone = min(totlen, M_TRAILINGSPACE(m));
	}
	if (sc->bus32bit) {
	    insl(BASE + EP_W1_RX_PIO_RD_1, mtod(m, caddr_t) + m->m_len,
		 lenthisone / 4);
	    m->m_len += (lenthisone & ~3);
	    if (lenthisone & 3)
		insb(BASE + EP_W1_RX_PIO_RD_1,
		     mtod(m, caddr_t) + m->m_len,
		     lenthisone & 3);
	    m->m_len += (lenthisone & 3);
	} else {
	    insw(BASE + EP_W1_RX_PIO_RD_1, mtod(m, caddr_t) + m->m_len,
		 lenthisone / 2);
	    m->m_len += lenthisone;
	    if (lenthisone & 1)
		*(mtod(m, caddr_t) + m->m_len - 1) = inb(BASE + EP_W1_RX_PIO_RD_1);
	}
	totlen -= lenthisone;
    }
    if (off) {
	top = sc->mb[sc->next_mb];
	sc->mb[sc->next_mb] = 0;
	if (top == 0) {
	    MGETHDR(m, M_DONTWAIT, MT_DATA);
	    if (top == 0) {
		top = m0;
		goto out;
	    }
	} else {
	    /* Convert one of our saved mbuf's */
	    sc->next_mb = (sc->next_mb + 1) % MAX_MBS;
	    top->m_data = top->m_pktdat;
	    top->m_flags = M_PKTHDR;
	}
	insw(BASE + EP_W1_RX_PIO_RD_1, mtod(top, caddr_t),
	     sizeof(struct ether_header));
	top->m_next = m0;
	top->m_len = sizeof(struct ether_header);
	/* XXX Accomodate for type and len from beginning of trailer */
	top->m_pkthdr.len = save_totlen - (2 * sizeof(u_short));
    } else {
	top = m0;
	top->m_pkthdr.len = save_totlen;
    }

    top->m_pkthdr.rcvif = &sc->arpcom.ac_if;
    outw(BASE + EP_COMMAND, RX_DISCARD_TOP_PACK);
    while (inw(BASE + EP_STATUS) & S_COMMAND_IN_PROGRESS);
    ++sc->arpcom.ac_if.if_ipackets;
#if NBPFILTER > 0
    if (sc->bpf) {
	bpf_mtap(sc->bpf, top);

	/*
	 * Note that the interface cannot be in promiscuous mode if there are
	 * no BPF listeners.  And if we are in promiscuous mode, we have to
	 * check if this packet is really ours.
	 */
	if ((sc->arpcom.ac_if.if_flags & IFF_PROMISC) &&
	    (eh->ether_dhost[0] & 1) == 0 &&
	    bcmp(eh->ether_dhost, sc->arpcom.ac_enaddr,
		 sizeof(eh->ether_dhost)) != 0 &&
	    bcmp(eh->ether_dhost, etherbroadcastaddr,
		 sizeof(eh->ether_dhost)) != 0) {
	    m_freem(top);
	    return;
	}
    }
#endif
    m_adj(top, sizeof(struct ether_header));
    ether_input(&sc->arpcom.ac_if, eh, top);
    return;
#endif	/* MACH_KERNEL */

out:outw(BASE + EP_COMMAND, RX_DISCARD_TOP_PACK);
    while (inw(BASE + EP_STATUS) & S_COMMAND_IN_PROGRESS);
#ifndef	MACH_KERNEL
    if (top)
	m_freem(top);
#endif	/* MACH_KERNEL */

#ifdef	ZP_DEBUG
    printf("### zpread Error ####\n");
#endif	/* ZP_DEBUG */
}


#ifdef	MACH_KERNEL

int
zpgetstat(dev, flavor, status, count)
    dev_t           dev;
    int             flavor;
    dev_status_t    status;
    unsigned int   *count;
{
    register int    unit = minor(dev);

#ifdef	ZP_DEBUG
    printf("### zpgetstat ####\n");
#endif	/* ZP_DEBUG */

    if (unit < 0 || unit >= NZP || zp_softc[unit].attached == 0) {
	return (ENXIO);
    }
    return (net_getstat(&zp_softc[unit].ds_if, flavor, status, count));
}

int
zpsetstat(dev, flavor, status, count)
    dev_t           dev;
    int             flavor;
    dev_status_t    status;
    unsigned int    count;
{
    register int    unit = minor(dev);
    register zp_softc_t *sc;

#ifdef	ZP_DEBUG
    printf("### zpsetstat ####\n");
#endif	/* ZP_DEBUG */

    if (unit < 0 || unit >= NZP || zp_softc[unit].attached == 0) {
	return (ENXIO);
    }
    sc = &zp_softc[unit];

    switch (flavor) {
    case NET_STATUS:
	{
	    register struct net_status *ns =
	    (struct net_status *) status;

	    if (count < NET_STATUS_COUNT) {
		return (D_INVALID_SIZE);
	    }
	    if (sc->ds_if.if_flags != ns->flags) {
		sc->ds_if.if_flags = ns->flags;
		if (sc->ds_if.if_flags & IFF_RUNNING) {
		    zpinit(sc->ds_if.if_unit);
		}
	    }
	}
	break;
    default:
	return (D_INVALID_OPERATION);
    }
    return (D_SUCCESS);
}

#else	/* MACH_KERNEL */

/*
 * Look familiar?
 */
static int
zpioctl(ifp, cmd, data)
    register struct ifnet *ifp;
    int             cmd;
    caddr_t         data;
{
    register struct ifaddr *ifa = (struct ifaddr *) data;
    struct zp_softc *sc = &zp_softc[ifp->if_unit];
    int             error = 0;

#ifdef	ZP_DEBUG
    printf("### zpioctl ####\n");
#endif	/* ZP_DEBUG */

    switch (cmd) {
    case SIOCSIFADDR:
	ifp->if_flags |= IFF_UP;
	switch (ifa->ifa_addr->sa_family) {
#ifdef INET
	case AF_INET:
	    zpinit(ifp->if_unit);	/* before arpwhohas */
#if 1
	    arp_ifinit((struct arpcom *) ifp, ifa);
#else
	    ((struct arpcom *) ifp)->ac_ipaddr = IA_SIN(ifa)->sin_addr;
	    arpwhohas((struct arpcom *) ifp, &IA_SIN(ifa)->sin_addr);
#endif
	    break;
#endif
#ifdef IPX
	case AF_IPX:
	    {
		register struct ipx_addr *ina = &(IA_SIPX(ifa)->sipx_addr);

		if (ipx_nullhost(*ina))
		    ina->x_host =
			*(union ipx_host *) (sc->arpcom.ac_enaddr);
		else {
		    ifp->if_flags &= ~IFF_RUNNING;
		    bcopy((caddr_t) ina->x_host.c_host,
			  (caddr_t) sc->arpcom.ac_enaddr,
			  sizeof(sc->arpcom.ac_enaddr));
		}
		zpinit(ifp->if_unit);
		break;
	    }
#endif
#ifdef NS
	case AF_NS:
	    {
		register struct ns_addr *ina = &(IA_SNS(ifa)->sns_addr);

		if (ns_nullhost(*ina))
		    ina->x_host =
			*(union ns_host *) (sc->arpcom.ac_enaddr);
		else {
		    ifp->if_flags &= ~IFF_RUNNING;
		    bcopy((caddr_t) ina->x_host.c_host,
			  (caddr_t) sc->arpcom.ac_enaddr,
			  sizeof(sc->arpcom.ac_enaddr));
		}
		zpinit(ifp->if_unit);
		break;
	    }
#endif
	default:
	    zpinit(ifp->if_unit);
	    break;
	}
	break;
    case SIOCSIFFLAGS:
	if ((ifp->if_flags & IFF_UP) == 0 && ifp->if_flags & IFF_RUNNING) {
	    ifp->if_flags &= ~IFF_RUNNING;
	    zpstop(ifp->if_unit);
	    zpmbufempty(sc);
	    break;
	}
	if (ifp->if_flags & IFF_UP && (ifp->if_flags & IFF_RUNNING) == 0)
	    zpinit(ifp->if_unit);
	break;
#ifdef notdef
    case SIOCGHWADDR:
	bcopy((caddr_t) sc->sc_addr, (caddr_t) & ifr->ifr_data,
	      sizeof(sc->sc_addr));
	break;
#endif
    default:
	error = EINVAL;
    }
    return (error);
}

#endif	/* MACH_KERNEL */

void
zpreset(unit)
    int             unit;
{
    int             s = splimp();

#ifdef	ZP_DEBUG
    printf("### zpreset ####\n");
#endif	/* ZP_DEBUG */

    zpstop(unit);
    zpinit(unit);
    splx(s);
}

void
zpwatchdog(unit)
    int             unit;
{
    struct zp_softc *sc = &zp_softc[unit];

#ifdef	ZP_DEBUG
    printf("### zpwatchdog ####\n");
#endif	/* ZP_DEBUG */

#ifdef	MACH_KERNEL
    ++sc->ds_if.if_oerrors;
#else	/* MACH_KERNEL */
    log(LOG_ERR, "zp%d: watchdog\n", unit);
    ++sc->arpcom.ac_if.if_oerrors;
#endif	/* MACH_KERNEL */
    zpreset(unit);
}

void
zpstop(unit)
    int             unit;
{
    struct zp_softc *sc = &zp_softc[unit];

#ifdef	ZP_DEBUG
    printf("### zpstop ####\n");
#endif	/* ZP_DEBUG */

    outw(BASE + EP_COMMAND, RX_DISABLE);
    outw(BASE + EP_COMMAND, RX_DISCARD_TOP_PACK);
    while (inw(BASE + EP_STATUS) & S_COMMAND_IN_PROGRESS);
    outw(BASE + EP_COMMAND, TX_DISABLE);
    outw(BASE + EP_COMMAND, STOP_TRANSCEIVER);
    outw(BASE + EP_COMMAND, RX_RESET);
    outw(BASE + EP_COMMAND, TX_RESET);
    outw(BASE + EP_COMMAND, C_INTR_LATCH);
    outw(BASE + EP_COMMAND, SET_RD_0_MASK);
    outw(BASE + EP_COMMAND, SET_INTR_MASK);
    outw(BASE + EP_COMMAND, SET_RX_FILTER);
}



static          u_short
read_eeprom_data(id_port, offset)
    int             id_port;
    int             offset;
{

#ifdef	ZP_DEBUG
    printf("### read_eeprom_data ####\n");
#ifdef MACH_KERNEL
    cngetc();
#endif	/* MACH_KERNEL */
#endif	/* ZP_DEBUG */

    outb(id_port + 10, 0x80 + offset);
    DELAY(1000);
    return inw(id_port + 12);
}




#ifndef	MACH_KERNEL
void
zpmbuffill(sp)
    void           *sp;
{
    struct zp_softc *sc = (struct zp_softc *) sp;
    int             s, i;

#ifdef	ZP_DEBUG
    printf("### zpmbuffill ####\n");
#endif	/* ZP_DEBUG */

    s = splimp();
    i = sc->last_mb;
    do {
	if (sc->mb[i] == NULL)
	    MGET(sc->mb[i], M_DONTWAIT, MT_DATA);
	if (sc->mb[i] == NULL)
	    break;
	i = (i + 1) % MAX_MBS;
    } while (i != sc->next_mb);
    sc->last_mb = i;
    splx(s);
}

static void
zpmbufempty(sc)
    struct zp_softc *sc;
{
    int             s, i;

#ifdef	ZP_DEBUG
    printf("### zpmbufempty ####\n");
#endif	/* ZP_DEBUG */

    s = splimp();
    for (i = 0; i < MAX_MBS; i++) {
	if (sc->mb[i]) {
	    m_freem(sc->mb[i]);
	    sc->mb[i] = NULL;
	}
    }
    sc->last_mb = sc->next_mb = 0;
    untimeout(zpmbuffill, sc);
    splx(s);
}

#endif	/* MACH_KERNEL */

#endif	/* NZP > 0 */