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[hh.org.git] / drivers / net / ni52.c

/*
 * net-3-driver for the NI5210 card (i82586 Ethernet chip)
 *
 * This is an extension to the Linux operating system, and is covered by the
 * same GNU General Public License that covers that work.
 *
 * Alphacode 0.82 (96/09/29) for Linux 2.0.0 (or later)
 * Copyrights (c) 1994,1995,1996 by M.Hipp (hippm@informatik.uni-tuebingen.de)
 *    [feel free to mail ....]
 *
 * when using as module: (no autoprobing!)
 *   compile with:
 *       gcc -O2 -fomit-frame-pointer -m486 -D__KERNEL__ -DMODULE -c ni52.c
 *   run with e.g:
 *       insmod ni52.o io=0x360 irq=9 memstart=0xd0000 memend=0xd4000
 *
 * CAN YOU PLEASE REPORT ME YOUR PERFORMANCE EXPERIENCES !!.
 *
 * If you find a bug, please report me:
 *   The kernel panic output and any kmsg from the ni52 driver
 *   the ni5210-driver-version and the linux-kernel version
 *   how many shared memory (memsize) on the netcard,
 *   bootprom: yes/no, base_addr, mem_start
 *   maybe the ni5210-card revision and the i82586 version
 *
 * autoprobe for: base_addr: 0x300,0x280,0x360,0x320,0x340
 *                mem_start: 0xd0000,0xd2000,0xc8000,0xca000,0xd4000,0xd6000,
 *                           0xd8000,0xcc000,0xce000,0xda000,0xdc000
 *
 * sources:
 *   skeleton.c from Donald Becker
 *
 * I have also done a look in the following sources: (mail me if you need them)
 *   crynwr-packet-driver by Russ Nelson
 *   Garret A. Wollman's (fourth) i82586-driver for BSD
 *   (before getting an i82596 (yes 596 not 586) manual, the existing drivers helped
 *    me a lot to understand this tricky chip.)
 *
 * Known Problems:
 *   The internal sysbus seems to be slow. So we often lose packets because of
 *   overruns while receiving from a fast remote host.
 *   This can slow down TCP connections. Maybe the newer ni5210 cards are better.
 *   my experience is, that if a machine sends with more than about 500-600K/s
 *   the fifo/sysbus overflows.
 *
 * IMPORTANT NOTE:
 *   On fast networks, it's a (very) good idea to have 16K shared memory. With
 *   8K, we can store only 4 receive frames, so it can (easily) happen that a remote
 *   machine 'overruns' our system.
 *
 * Known i82586/card problems (I'm sure, there are many more!):
 *   Running the NOP-mode, the i82586 sometimes seems to forget to report
 *   every xmit-interrupt until we restart the CU.
 *   Another MAJOR bug is, that the RU sometimes seems to ignore the EL-Bit
 *   in the RBD-Struct which indicates an end of the RBD queue.
 *   Instead, the RU fetches another (randomly selected and
 *   usually used) RBD and begins to fill it. (Maybe, this happens only if
 *   the last buffer from the previous RFD fits exact into the queue and
 *   the next RFD can't fetch an initial RBD. Anyone knows more? )
 *
 * results from ftp performance tests with Linux 1.2.5
 *   send and receive about 350-400 KByte/s (peak up to 460 kbytes/s)
 *   sending in NOP-mode: peak performance up to 530K/s (but better don't run this mode)
 */

/*
 * 29.Sept.96: virt_to_bus changes for new memory scheme
 * 19.Feb.96: more Mcast changes, module support (MH)
 *
 * 18.Nov.95: Mcast changes (AC).
 *
 * 23.April.95: fixed(?) receiving problems by configuring a RFD more
 *              than the number of RBD's. Can maybe cause other problems.
 * 18.April.95: Added MODULE support (MH)
 * 17.April.95: MC related changes in init586() and set_multicast_list().
 *              removed use of 'jiffies' in init586() (MH)
 *
 * 19.Sep.94: Added Multicast support (not tested yet) (MH)
 *
 * 18.Sep.94: Workaround for 'EL-Bug'. Removed flexible RBD-handling.
 *            Now, every RFD has exact one RBD. (MH)
 *
 * 14.Sep.94: added promiscuous mode, a few cleanups (MH)
 *
 * 19.Aug.94: changed request_irq() parameter (MH)
 *
 * 20.July.94: removed cleanup bugs, removed a 16K-mem-probe-bug (MH)
 *
 * 19.July.94: lotsa cleanups .. (MH)
 *
 * 17.July.94: some patches ... verified to run with 1.1.29 (MH)
 *
 * 4.July.94: patches for Linux 1.1.24  (MH)
 *
 * 26.March.94: patches for Linux 1.0 and iomem-auto-probe (MH)
 *
 * 30.Sep.93: Added nop-chain .. driver now runs with only one Xmit-Buff, too (MH)
 *
 * < 30.Sep.93: first versions
 */

static int debuglevel;  /* debug-printk 0: off 1: a few 2: more */
static int automatic_resume; /* experimental .. better should be zero */
static int rfdadd;      /* rfdadd=1 may be better for 8K MEM cards */
static int fifo=0x8;    /* don't change */

/* #define REALLY_SLOW_IO */

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/errno.h>
#include <linux/ioport.h>
#include <linux/slab.h>
#include <linux/interrupt.h>
#include <linux/delay.h>
#include <linux/init.h>
#include <linux/bitops.h>
#include <asm/io.h>

#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/skbuff.h>

#include "ni52.h"

#define DRV_NAME "ni52"

#define DEBUG       /* debug on */
#define SYSBUSVAL 1 /* 8 Bit */

#define ni_attn586()  {outb(0,dev->base_addr+NI52_ATTENTION);}
#define ni_reset586() {outb(0,dev->base_addr+NI52_RESET);}
#define ni_disint()   {outb(0,dev->base_addr+NI52_INTDIS);}
#define ni_enaint()   {outb(0,dev->base_addr+NI52_INTENA);}

#define make32(ptr16) (p->memtop + (short) (ptr16) )
#define make24(ptr32) ( ((char *) (ptr32)) - p->base)
#define make16(ptr32) ((unsigned short) ((unsigned long)(ptr32) - (unsigned long) p->memtop ))

/******************* how to calculate the buffers *****************************

  * IMPORTANT NOTE: if you configure only one NUM_XMIT_BUFFS, the driver works
  * --------------- in a different (more stable?) mode. Only in this mode it's
  *                 possible to configure the driver with 'NO_NOPCOMMANDS'

sizeof(scp)=12; sizeof(scb)=16; sizeof(iscp)=8;
sizeof(scp)+sizeof(iscp)+sizeof(scb) = 36 = INIT
sizeof(rfd) = 24; sizeof(rbd) = 12;
sizeof(tbd) = 8; sizeof(transmit_cmd) = 16;
sizeof(nop_cmd) = 8;

  * if you don't know the driver, better do not change these values: */

#define RECV_BUFF_SIZE 1524 /* slightly oversized */
#define XMIT_BUFF_SIZE 1524 /* slightly oversized */
#define NUM_XMIT_BUFFS 1    /* config for both, 8K and 16K shmem */
#define NUM_RECV_BUFFS_8  4 /* config for 8K shared mem */
#define NUM_RECV_BUFFS_16 9 /* config for 16K shared mem */
#define NO_NOPCOMMANDS      /* only possible with NUM_XMIT_BUFFS=1 */

/**************************************************************************/

/* different DELAYs */
#define DELAY(x) mdelay(32 * x);
#define DELAY_16(); { udelay(16); }
#define DELAY_18(); { udelay(4); }

/* wait for command with timeout: */
#define WAIT_4_SCB_CMD() \
{ int i; \
  for(i=0;i<16384;i++) { \
    if(!p->scb->cmd_cuc) break; \
    DELAY_18(); \
    if(i == 16383) { \
      printk("%s: scb_cmd timed out: %04x,%04x .. disabling i82586!!\n",dev->name,p->scb->cmd_cuc,p->scb->cus); \
       if(!p->reseted) { p->reseted = 1; ni_reset586(); } } } }

#define WAIT_4_SCB_CMD_RUC() { int i; \
  for(i=0;i<16384;i++) { \
    if(!p->scb->cmd_ruc) break; \
    DELAY_18(); \
    if(i == 16383) { \
      printk("%s: scb_cmd (ruc) timed out: %04x,%04x .. disabling i82586!!\n",dev->name,p->scb->cmd_ruc,p->scb->rus); \
       if(!p->reseted) { p->reseted = 1; ni_reset586(); } } } }

#define WAIT_4_STAT_COMPL(addr) { int i; \
   for(i=0;i<32767;i++) { \
     if((addr)->cmd_status & STAT_COMPL) break; \
     DELAY_16(); DELAY_16(); } }

#define NI52_TOTAL_SIZE 16
#define NI52_ADDR0 0x02
#define NI52_ADDR1 0x07
#define NI52_ADDR2 0x01

static int     ni52_probe1(struct net_device *dev,int ioaddr);
static irqreturn_t ni52_interrupt(int irq,void *dev_id);
static int     ni52_open(struct net_device *dev);
static int     ni52_close(struct net_device *dev);
static int     ni52_send_packet(struct sk_buff *,struct net_device *);
static struct  net_device_stats *ni52_get_stats(struct net_device *dev);
static void    set_multicast_list(struct net_device *dev);
static void    ni52_timeout(struct net_device *dev);
#if 0
static void    ni52_dump(struct net_device *,void *);
#endif

/* helper-functions */
static int     init586(struct net_device *dev);
static int     check586(struct net_device *dev,char *where,unsigned size);
static void    alloc586(struct net_device *dev);
static void    startrecv586(struct net_device *dev);
static void   *alloc_rfa(struct net_device *dev,void *ptr);
static void    ni52_rcv_int(struct net_device *dev);
static void    ni52_xmt_int(struct net_device *dev);
static void    ni52_rnr_int(struct net_device *dev);

struct priv
{
        struct net_device_stats stats;
        unsigned long base;
        char *memtop;
        long int lock;
        int reseted;
        volatile struct rfd_struct      *rfd_last,*rfd_top,*rfd_first;
        volatile struct scp_struct      *scp;   /* volatile is important */
        volatile struct iscp_struct     *iscp;  /* volatile is important */
        volatile struct scb_struct      *scb;   /* volatile is important */
        volatile struct tbd_struct      *xmit_buffs[NUM_XMIT_BUFFS];
#if (NUM_XMIT_BUFFS == 1)
        volatile struct transmit_cmd_struct *xmit_cmds[2];
        volatile struct nop_cmd_struct *nop_cmds[2];
#else
        volatile struct transmit_cmd_struct *xmit_cmds[NUM_XMIT_BUFFS];
        volatile struct nop_cmd_struct *nop_cmds[NUM_XMIT_BUFFS];
#endif
        volatile int            nop_point,num_recv_buffs;
        volatile char           *xmit_cbuffs[NUM_XMIT_BUFFS];
        volatile int            xmit_count,xmit_last;
};

/**********************************************
 * close device
 */
static int ni52_close(struct net_device *dev)
{
        free_irq(dev->irq, dev);

        ni_reset586(); /* the hard way to stop the receiver */

        netif_stop_queue(dev);

        return 0;
}

/**********************************************
 * open device
 */
static int ni52_open(struct net_device *dev)
{
        int ret;

        ni_disint();
        alloc586(dev);
        init586(dev);
        startrecv586(dev);
        ni_enaint();

        ret = request_irq(dev->irq, &ni52_interrupt,0,dev->name,dev);
        if (ret)
        {
                ni_reset586();
                return ret;
        }

        netif_start_queue(dev);

        return 0; /* most done by init */
}

/**********************************************
 * Check to see if there's an 82586 out there.
 */
static int check586(struct net_device *dev,char *where,unsigned size)
{
        struct priv pb;
        struct priv *p = /* (struct priv *) dev->priv*/ &pb;
        char *iscp_addrs[2];
        int i;

        p->base = (unsigned long) isa_bus_to_virt((unsigned long)where) + size - 0x01000000;
        p->memtop = isa_bus_to_virt((unsigned long)where) + size;
        p->scp = (struct scp_struct *)(p->base + SCP_DEFAULT_ADDRESS);
        memset((char *)p->scp,0, sizeof(struct scp_struct));
        for(i=0;i<sizeof(struct scp_struct);i++) /* memory was writeable? */
                if(((char *)p->scp)[i])
                        return 0;
        p->scp->sysbus = SYSBUSVAL;                             /* 1 = 8Bit-Bus, 0 = 16 Bit */
        if(p->scp->sysbus != SYSBUSVAL)
                return 0;

        iscp_addrs[0] = isa_bus_to_virt((unsigned long)where);
        iscp_addrs[1]= (char *) p->scp - sizeof(struct iscp_struct);

        for(i=0;i<2;i++)
        {
                p->iscp = (struct iscp_struct *) iscp_addrs[i];
                memset((char *)p->iscp,0, sizeof(struct iscp_struct));

                p->scp->iscp = make24(p->iscp);
                p->iscp->busy = 1;

                ni_reset586();
                ni_attn586();
                DELAY(1);       /* wait a while... */

                if(p->iscp->busy) /* i82586 clears 'busy' after successful init */
                        return 0;
        }
        return 1;
}

/******************************************************************
 * set iscp at the right place, called by ni52_probe1 and open586.
 */
static void alloc586(struct net_device *dev)
{
        struct priv *p =        (struct priv *) dev->priv;

        ni_reset586();
        DELAY(1);

        p->scp  = (struct scp_struct *) (p->base + SCP_DEFAULT_ADDRESS);
        p->scb  = (struct scb_struct *) isa_bus_to_virt(dev->mem_start);
        p->iscp = (struct iscp_struct *) ((char *)p->scp - sizeof(struct iscp_struct));

        memset((char *) p->iscp,0,sizeof(struct iscp_struct));
        memset((char *) p->scp ,0,sizeof(struct scp_struct));

        p->scp->iscp = make24(p->iscp);
        p->scp->sysbus = SYSBUSVAL;
        p->iscp->scb_offset = make16(p->scb);

        p->iscp->busy = 1;
        ni_reset586();
        ni_attn586();

        DELAY(1);

        if(p->iscp->busy)
                printk("%s: Init-Problems (alloc).\n",dev->name);

        p->reseted = 0;

        memset((char *)p->scb,0,sizeof(struct scb_struct));
}

/* set: io,irq,memstart,memend or set it when calling insmod */
static int irq=9;
static int io=0x300;
static long memstart;   /* e.g 0xd0000 */
static long memend;     /* e.g 0xd4000 */

/**********************************************
 * probe the ni5210-card
 */
struct net_device * __init ni52_probe(int unit)
{
        struct net_device *dev = alloc_etherdev(sizeof(struct priv));
        static int ports[] = {0x300, 0x280, 0x360 , 0x320 , 0x340, 0};
        int *port;
        int err = 0;

        if (!dev)
                return ERR_PTR(-ENOMEM);

        if (unit >= 0) {
                sprintf(dev->name, "eth%d", unit);
                netdev_boot_setup_check(dev);
                io = dev->base_addr;
                irq = dev->irq;
                memstart = dev->mem_start;
                memend = dev->mem_end;
        }

        SET_MODULE_OWNER(dev);

        if (io > 0x1ff) {       /* Check a single specified location. */
                err = ni52_probe1(dev, io);
        } else if (io > 0) {            /* Don't probe at all. */
                err = -ENXIO;
        } else {
                for (port = ports; *port && ni52_probe1(dev, *port) ; port++)
                        ;
                if (*port)
                        goto got_it;
#ifdef FULL_IO_PROBE
                for (io = 0x200; io < 0x400 && ni52_probe1(dev, io); io += 8)
                        ;
                if (io < 0x400)
                        goto got_it;
#endif
                err = -ENODEV;
        }
        if (err)
                goto out;
got_it:
        err = register_netdev(dev);
        if (err)
                goto out1;
        return dev;
out1:
        release_region(dev->base_addr, NI52_TOTAL_SIZE);
out:
        free_netdev(dev);
        return ERR_PTR(err);
}

static int __init ni52_probe1(struct net_device *dev,int ioaddr)
{
        int i, size, retval;

        dev->base_addr = ioaddr;
        dev->irq = irq;
        dev->mem_start = memstart;
        dev->mem_end = memend;

        if (!request_region(ioaddr, NI52_TOTAL_SIZE, DRV_NAME))
                return -EBUSY;

        if( !(inb(ioaddr+NI52_MAGIC1) == NI52_MAGICVAL1) ||
            !(inb(ioaddr+NI52_MAGIC2) == NI52_MAGICVAL2)) {
                retval = -ENODEV;
                goto out;
        }

        for(i=0;i<ETH_ALEN;i++)
                dev->dev_addr[i] = inb(dev->base_addr+i);

        if(dev->dev_addr[0] != NI52_ADDR0 || dev->dev_addr[1] != NI52_ADDR1
                 || dev->dev_addr[2] != NI52_ADDR2) {
                retval = -ENODEV;
                goto out;
        }

        printk(KERN_INFO "%s: NI5210 found at %#3lx, ",dev->name,dev->base_addr);

        /*
         * check (or search) IO-Memory, 8K and 16K
         */
#ifdef MODULE
        size = dev->mem_end - dev->mem_start;
        if(size != 0x2000 && size != 0x4000) {
                printk("\n%s: Illegal memory size %d. Allowed is 0x2000 or 0x4000 bytes.\n",dev->name,size);
                retval = -ENODEV;
                goto out;
        }
        if(!check586(dev,(char *) dev->mem_start,size)) {
                printk("?memcheck, Can't find memory at 0x%lx with size %d!\n",dev->mem_start,size);
                retval = -ENODEV;
                goto out;
        }
#else
        if(dev->mem_start != 0) /* no auto-mem-probe */
        {
                size = 0x4000; /* check for 16K mem */
                if(!check586(dev,(char *) dev->mem_start,size)) {
                        size = 0x2000; /* check for 8K mem */
                        if(!check586(dev,(char *) dev->mem_start,size)) {
                                printk("?memprobe, Can't find memory at 0x%lx!\n",dev->mem_start);
                                retval = -ENODEV;
                                goto out;
                        }
                }
        }
        else
        {
                static long memaddrs[] = { 0xc8000,0xca000,0xcc000,0xce000,0xd0000,0xd2000,
                                        0xd4000,0xd6000,0xd8000,0xda000,0xdc000, 0 };
                for(i=0;;i++)
                {
                        if(!memaddrs[i]) {
                                printk("?memprobe, Can't find io-memory!\n");
                                retval = -ENODEV;
                                goto out;
                        }
                        dev->mem_start = memaddrs[i];
                        size = 0x2000; /* check for 8K mem */
                        if(check586(dev,(char *)dev->mem_start,size)) /* 8K-check */
                                break;
                        size = 0x4000; /* check for 16K mem */
                        if(check586(dev,(char *)dev->mem_start,size)) /* 16K-check */
                                break;
                }
        }
        dev->mem_end = dev->mem_start + size; /* set mem_end showed by 'ifconfig' */
#endif

        memset((char *) dev->priv,0,sizeof(struct priv));

        ((struct priv *) (dev->priv))->memtop = isa_bus_to_virt(dev->mem_start) + size;
        ((struct priv *) (dev->priv))->base =   (unsigned long) isa_bus_to_virt(dev->mem_start) + size - 0x01000000;
        alloc586(dev);

        /* set number of receive-buffs according to memsize */
        if(size == 0x2000)
                ((struct priv *) dev->priv)->num_recv_buffs = NUM_RECV_BUFFS_8;
        else
                ((struct priv *) dev->priv)->num_recv_buffs = NUM_RECV_BUFFS_16;

        printk("Memaddr: 0x%lx, Memsize: %d, ",dev->mem_start,size);

        if(dev->irq < 2)
        {
                unsigned long irq_mask;

                irq_mask = probe_irq_on();
                ni_reset586();
                ni_attn586();

                mdelay(20);
                dev->irq = probe_irq_off(irq_mask);
                if(!dev->irq)
                {
                        printk("?autoirq, Failed to detect IRQ line!\n");
                        retval = -EAGAIN;
                        goto out;
                }
                printk("IRQ %d (autodetected).\n",dev->irq);
        }
        else    {
                if(dev->irq == 2)
                        dev->irq = 9;
                printk("IRQ %d (assigned and not checked!).\n",dev->irq);
        }

        dev->open               = ni52_open;
        dev->stop               = ni52_close;
        dev->get_stats          = ni52_get_stats;
        dev->tx_timeout         = ni52_timeout;
        dev->watchdog_timeo     = HZ/20;
        dev->hard_start_xmit    = ni52_send_packet;
        dev->set_multicast_list = set_multicast_list;

        dev->if_port            = 0;

        return 0;
out:
        release_region(ioaddr, NI52_TOTAL_SIZE);
        return retval;
}

/**********************************************
 * init the chip (ni52-interrupt should be disabled?!)
 * needs a correct 'allocated' memory
 */

static int init586(struct net_device *dev)
{
        void *ptr;
        int i,result=0;
        struct priv *p = (struct priv *) dev->priv;
        volatile struct configure_cmd_struct    *cfg_cmd;
        volatile struct iasetup_cmd_struct *ias_cmd;
        volatile struct tdr_cmd_struct *tdr_cmd;
        volatile struct mcsetup_cmd_struct *mc_cmd;
        struct dev_mc_list *dmi=dev->mc_list;
        int num_addrs=dev->mc_count;

        ptr = (void *) ((char *)p->scb + sizeof(struct scb_struct));

        cfg_cmd = (struct configure_cmd_struct *)ptr; /* configure-command */
        cfg_cmd->cmd_status     = 0;
        cfg_cmd->cmd_cmd        = CMD_CONFIGURE | CMD_LAST;
        cfg_cmd->cmd_link       = 0xffff;

        cfg_cmd->byte_cnt       = 0x0a; /* number of cfg bytes */
        cfg_cmd->fifo           = fifo; /* fifo-limit (8=tx:32/rx:64) */
        cfg_cmd->sav_bf         = 0x40; /* hold or discard bad recv frames (bit 7) */
        cfg_cmd->adr_len        = 0x2e; /* addr_len |!src_insert |pre-len |loopback */
        cfg_cmd->priority       = 0x00;
        cfg_cmd->ifs            = 0x60;
        cfg_cmd->time_low       = 0x00;
        cfg_cmd->time_high      = 0xf2;
        cfg_cmd->promisc        = 0;
        if(dev->flags & IFF_ALLMULTI) {
                int len = ((char *) p->iscp - (char *) ptr - 8) / 6;
                if(num_addrs > len)     {
                        printk("%s: switching to promisc. mode\n",dev->name);
                        dev->flags|=IFF_PROMISC;
                }
        }
        if(dev->flags&IFF_PROMISC)
        {
                         cfg_cmd->promisc=1;
                         dev->flags|=IFF_PROMISC;
        }
        cfg_cmd->carr_coll      = 0x00;

        p->scb->cbl_offset      = make16(cfg_cmd);
        p->scb->cmd_ruc         = 0;

        p->scb->cmd_cuc         = CUC_START; /* cmd.-unit start */
        ni_attn586();

        WAIT_4_STAT_COMPL(cfg_cmd);

        if((cfg_cmd->cmd_status & (STAT_OK|STAT_COMPL)) != (STAT_COMPL|STAT_OK))
        {
                printk("%s: configure command failed: %x\n",dev->name,cfg_cmd->cmd_status);
                return 1;
        }

        /*
         * individual address setup
         */

        ias_cmd = (struct iasetup_cmd_struct *)ptr;

        ias_cmd->cmd_status     = 0;
        ias_cmd->cmd_cmd        = CMD_IASETUP | CMD_LAST;
        ias_cmd->cmd_link       = 0xffff;

        memcpy((char *)&ias_cmd->iaddr,(char *) dev->dev_addr,ETH_ALEN);

        p->scb->cbl_offset = make16(ias_cmd);

        p->scb->cmd_cuc = CUC_START; /* cmd.-unit start */
        ni_attn586();

        WAIT_4_STAT_COMPL(ias_cmd);

        if((ias_cmd->cmd_status & (STAT_OK|STAT_COMPL)) != (STAT_OK|STAT_COMPL)) {
                printk("%s (ni52): individual address setup command failed: %04x\n",dev->name,ias_cmd->cmd_status);
                return 1;
        }

        /*
         * TDR, wire check .. e.g. no resistor e.t.c
         */

        tdr_cmd = (struct tdr_cmd_struct *)ptr;

        tdr_cmd->cmd_status     = 0;
        tdr_cmd->cmd_cmd        = CMD_TDR | CMD_LAST;
        tdr_cmd->cmd_link       = 0xffff;
        tdr_cmd->status         = 0;

        p->scb->cbl_offset = make16(tdr_cmd);
        p->scb->cmd_cuc = CUC_START; /* cmd.-unit start */
        ni_attn586();

        WAIT_4_STAT_COMPL(tdr_cmd);

        if(!(tdr_cmd->cmd_status & STAT_COMPL))
        {
                printk("%s: Problems while running the TDR.\n",dev->name);
        }
        else
        {
                DELAY_16(); /* wait for result */
                result = tdr_cmd->status;

                p->scb->cmd_cuc = p->scb->cus & STAT_MASK;
                ni_attn586(); /* ack the interrupts */

                if(result & TDR_LNK_OK)
                        ;
                else if(result & TDR_XCVR_PRB)
                        printk("%s: TDR: Transceiver problem. Check the cable(s)!\n",dev->name);
                else if(result & TDR_ET_OPN)
                        printk("%s: TDR: No correct termination %d clocks away.\n",dev->name,result & TDR_TIMEMASK);
                else if(result & TDR_ET_SRT)
                {
                        if (result & TDR_TIMEMASK) /* time == 0 -> strange :-) */
                                printk("%s: TDR: Detected a short circuit %d clocks away.\n",dev->name,result & TDR_TIMEMASK);
                }
                else
                        printk("%s: TDR: Unknown status %04x\n",dev->name,result);
        }

        /*
         * Multicast setup
         */
        if(num_addrs && !(dev->flags & IFF_PROMISC) )
        {
                mc_cmd = (struct mcsetup_cmd_struct *) ptr;
                mc_cmd->cmd_status = 0;
                mc_cmd->cmd_cmd = CMD_MCSETUP | CMD_LAST;
                mc_cmd->cmd_link = 0xffff;
                mc_cmd->mc_cnt = num_addrs * 6;

                for(i=0;i<num_addrs;i++,dmi=dmi->next)
                        memcpy((char *) mc_cmd->mc_list[i], dmi->dmi_addr,6);

                p->scb->cbl_offset = make16(mc_cmd);
                p->scb->cmd_cuc = CUC_START;
                ni_attn586();

                WAIT_4_STAT_COMPL(mc_cmd);

                if( (mc_cmd->cmd_status & (STAT_COMPL|STAT_OK)) != (STAT_COMPL|STAT_OK) )
                        printk("%s: Can't apply multicast-address-list.\n",dev->name);
        }

        /*
         * alloc nop/xmit-cmds
         */
#if (NUM_XMIT_BUFFS == 1)
        for(i=0;i<2;i++)
        {
                p->nop_cmds[i]                  = (struct nop_cmd_struct *)ptr;
                p->nop_cmds[i]->cmd_cmd         = CMD_NOP;
                p->nop_cmds[i]->cmd_status      = 0;
                p->nop_cmds[i]->cmd_link        = make16((p->nop_cmds[i]));
                ptr = (char *) ptr + sizeof(struct nop_cmd_struct);
        }
#else
        for(i=0;i<NUM_XMIT_BUFFS;i++)
        {
                p->nop_cmds[i]                  = (struct nop_cmd_struct *)ptr;
                p->nop_cmds[i]->cmd_cmd         = CMD_NOP;
                p->nop_cmds[i]->cmd_status      = 0;
                p->nop_cmds[i]->cmd_link        = make16((p->nop_cmds[i]));
                ptr = (char *) ptr + sizeof(struct nop_cmd_struct);
        }
#endif

        ptr = alloc_rfa(dev,(void *)ptr); /* init receive-frame-area */

        /*
         * alloc xmit-buffs / init xmit_cmds
         */
        for(i=0;i<NUM_XMIT_BUFFS;i++)
        {
                p->xmit_cmds[i] = (struct transmit_cmd_struct *)ptr; /*transmit cmd/buff 0*/
                ptr = (char *) ptr + sizeof(struct transmit_cmd_struct);
                p->xmit_cbuffs[i] = (char *)ptr; /* char-buffs */
                ptr = (char *) ptr + XMIT_BUFF_SIZE;
                p->xmit_buffs[i] = (struct tbd_struct *)ptr; /* TBD */
                ptr = (char *) ptr + sizeof(struct tbd_struct);
                if((void *)ptr > (void *)p->iscp)
                {
                        printk("%s: not enough shared-mem for your configuration!\n",dev->name);
                        return 1;
                }
                memset((char *)(p->xmit_cmds[i]) ,0, sizeof(struct transmit_cmd_struct));
                memset((char *)(p->xmit_buffs[i]),0, sizeof(struct tbd_struct));
                p->xmit_cmds[i]->cmd_link = make16(p->nop_cmds[(i+1)%NUM_XMIT_BUFFS]);
                p->xmit_cmds[i]->cmd_status = STAT_COMPL;
                p->xmit_cmds[i]->cmd_cmd = CMD_XMIT | CMD_INT;
                p->xmit_cmds[i]->tbd_offset = make16((p->xmit_buffs[i]));
                p->xmit_buffs[i]->next = 0xffff;
                p->xmit_buffs[i]->buffer = make24((p->xmit_cbuffs[i]));
        }

        p->xmit_count = 0;
        p->xmit_last    = 0;
#ifndef NO_NOPCOMMANDS
        p->nop_point    = 0;
#endif

         /*
                * 'start transmitter'
                */
#ifndef NO_NOPCOMMANDS
        p->scb->cbl_offset = make16(p->nop_cmds[0]);
        p->scb->cmd_cuc = CUC_START;
        ni_attn586();
        WAIT_4_SCB_CMD();
#else
        p->xmit_cmds[0]->cmd_link = make16(p->xmit_cmds[0]);
        p->xmit_cmds[0]->cmd_cmd        = CMD_XMIT | CMD_SUSPEND | CMD_INT;
#endif

        /*
         * ack. interrupts
         */
        p->scb->cmd_cuc = p->scb->cus & STAT_MASK;
        ni_attn586();
        DELAY_16();

        ni_enaint();

        return 0;
}

/******************************************************
 * This is a helper routine for ni52_rnr_int() and init586().
 * It sets up the Receive Frame Area (RFA).
 */

static void *alloc_rfa(struct net_device *dev,void *ptr)
{
        volatile struct rfd_struct *rfd = (struct rfd_struct *)ptr;
        volatile struct rbd_struct *rbd;
        int i;
        struct priv *p = (struct priv *) dev->priv;

        memset((char *) rfd,0,sizeof(struct rfd_struct)*(p->num_recv_buffs+rfdadd));
        p->rfd_first = rfd;

        for(i = 0; i < (p->num_recv_buffs+rfdadd); i++) {
                rfd[i].next = make16(rfd + (i+1) % (p->num_recv_buffs+rfdadd) );
                rfd[i].rbd_offset = 0xffff;
        }
        rfd[p->num_recv_buffs-1+rfdadd].last = RFD_SUSP;         /* RU suspend */

        ptr = (void *) (rfd + (p->num_recv_buffs + rfdadd) );

        rbd = (struct rbd_struct *) ptr;
        ptr = (void *) (rbd + p->num_recv_buffs);

         /* clr descriptors */
        memset((char *) rbd,0,sizeof(struct rbd_struct)*(p->num_recv_buffs));

        for(i=0;i<p->num_recv_buffs;i++)
        {
                rbd[i].next = make16((rbd + (i+1) % p->num_recv_buffs));
                rbd[i].size = RECV_BUFF_SIZE;
                rbd[i].buffer = make24(ptr);
                ptr = (char *) ptr + RECV_BUFF_SIZE;
        }

        p->rfd_top      = p->rfd_first;
        p->rfd_last = p->rfd_first + (p->num_recv_buffs - 1 + rfdadd);

        p->scb->rfa_offset              = make16(p->rfd_first);
        p->rfd_first->rbd_offset        = make16(rbd);

        return ptr;
}


/**************************************************
 * Interrupt Handler ...
 */

static irqreturn_t ni52_interrupt(int irq,void *dev_id)
{
        struct net_device *dev = dev_id;
        unsigned short stat;
        int cnt=0;
        struct priv *p;

        if (!dev) {
                printk ("ni5210-interrupt: irq %d for unknown device.\n",irq);
                return IRQ_NONE;
        }
        p = (struct priv *) dev->priv;

        if(debuglevel > 1)
                printk("I");

        WAIT_4_SCB_CMD(); /* wait for last command      */

        while((stat=p->scb->cus & STAT_MASK))
        {
                p->scb->cmd_cuc = stat;
                ni_attn586();

                if(stat & STAT_FR)       /* received a frame */
                        ni52_rcv_int(dev);

                if(stat & STAT_RNR) /* RU went 'not ready' */
                {
                        printk("(R)");
                        if(p->scb->rus & RU_SUSPEND) /* special case: RU_SUSPEND */
                        {
                                WAIT_4_SCB_CMD();
                                p->scb->cmd_ruc = RUC_RESUME;
                                ni_attn586();
                                WAIT_4_SCB_CMD_RUC();
                        }
                        else
                        {
                                printk("%s: Receiver-Unit went 'NOT READY': %04x/%02x.\n",dev->name,(int) stat,(int) p->scb->rus);
                                ni52_rnr_int(dev);
                        }
                }

                if(stat & STAT_CX)              /* command with I-bit set complete */
                         ni52_xmt_int(dev);

#ifndef NO_NOPCOMMANDS
                if(stat & STAT_CNA)     /* CU went 'not ready' */
                {
                        if(netif_running(dev))
                                printk("%s: oops! CU has left active state. stat: %04x/%02x.\n",dev->name,(int) stat,(int) p->scb->cus);
                }
#endif

                if(debuglevel > 1)
                        printk("%d",cnt++);

                WAIT_4_SCB_CMD(); /* wait for ack. (ni52_xmt_int can be faster than ack!!) */
                if(p->scb->cmd_cuc)      /* timed out? */
                {
                        printk("%s: Acknowledge timed out.\n",dev->name);
                        ni_disint();
                        break;
                }
        }

        if(debuglevel > 1)
                printk("i");
        return IRQ_HANDLED;
}

/*******************************************************
 * receive-interrupt
 */

static void ni52_rcv_int(struct net_device *dev)
{
        int status,cnt=0;
        unsigned short totlen;
        struct sk_buff *skb;
        struct rbd_struct *rbd;
        struct priv *p = (struct priv *) dev->priv;

        if(debuglevel > 0)
                printk("R");

        for(;(status = p->rfd_top->stat_high) & RFD_COMPL;)
        {
                        rbd = (struct rbd_struct *) make32(p->rfd_top->rbd_offset);

                        if(status & RFD_OK) /* frame received without error? */
                        {
                                if( (totlen = rbd->status) & RBD_LAST) /* the first and the last buffer? */
                                {
                                        totlen &= RBD_MASK; /* length of this frame */
                                        rbd->status = 0;
                                        skb = (struct sk_buff *) dev_alloc_skb(totlen+2);
                                        if(skb != NULL)
                                        {
                                                skb->dev = dev;
                                                skb_reserve(skb,2);
                                                skb_put(skb,totlen);
                                                eth_copy_and_sum(skb,(char *) p->base+(unsigned long) rbd->buffer,totlen,0);
                                                skb->protocol=eth_type_trans(skb,dev);
                                                netif_rx(skb);
                                                dev->last_rx = jiffies;
                                                p->stats.rx_packets++;
                                                p->stats.rx_bytes += totlen;
                                        }
                                        else
                                                p->stats.rx_dropped++;
                                }
                                else
                                {
                                        int rstat;
                                                 /* free all RBD's until RBD_LAST is set */
                                        totlen = 0;
                                        while(!((rstat=rbd->status) & RBD_LAST))
                                        {
                                                totlen += rstat & RBD_MASK;
                                                if(!rstat)
                                                {
                                                        printk("%s: Whoops .. no end mark in RBD list\n",dev->name);
                                                        break;
                                                }
                                                rbd->status = 0;
                                                rbd = (struct rbd_struct *) make32(rbd->next);
                                        }
                                        totlen += rstat & RBD_MASK;
                                        rbd->status = 0;
                                        printk("%s: received oversized frame! length: %d\n",dev->name,totlen);
                                        p->stats.rx_dropped++;
                         }
                }
                else /* frame !(ok), only with 'save-bad-frames' */
                {
                        printk("%s: oops! rfd-error-status: %04x\n",dev->name,status);
                        p->stats.rx_errors++;
                }
                p->rfd_top->stat_high = 0;
                p->rfd_top->last = RFD_SUSP; /* maybe exchange by RFD_LAST */
                p->rfd_top->rbd_offset = 0xffff;
                p->rfd_last->last = 0;                          /* delete RFD_SUSP      */
                p->rfd_last = p->rfd_top;
                p->rfd_top = (struct rfd_struct *) make32(p->rfd_top->next); /* step to next RFD */
                p->scb->rfa_offset = make16(p->rfd_top);

                if(debuglevel > 0)
                        printk("%d",cnt++);
        }

        if(automatic_resume)
        {
                WAIT_4_SCB_CMD();
                p->scb->cmd_ruc = RUC_RESUME;
                ni_attn586();
                WAIT_4_SCB_CMD_RUC();
        }

#ifdef WAIT_4_BUSY
        {
                int i;
                for(i=0;i<1024;i++)
                {
                        if(p->rfd_top->status)
                                break;
                        DELAY_16();
                        if(i == 1023)
                                printk("%s: RU hasn't fetched next RFD (not busy/complete)\n",dev->name);
                }
        }
#endif

#if 0
        if(!at_least_one)
        {
                int i;
                volatile struct rfd_struct *rfds=p->rfd_top;
                volatile struct rbd_struct *rbds;
                printk("%s: received a FC intr. without having a frame: %04x %d\n",dev->name,status,old_at_least);
                for(i=0;i< (p->num_recv_buffs+4);i++)
                {
                        rbds = (struct rbd_struct *) make32(rfds->rbd_offset);
                        printk("%04x:%04x ",rfds->status,rbds->status);
                        rfds = (struct rfd_struct *) make32(rfds->next);
                }
                printk("\nerrs: %04x %04x stat: %04x\n",(int)p->scb->rsc_errs,(int)p->scb->ovrn_errs,(int)p->scb->status);
                printk("\nerrs: %04x %04x rus: %02x, cus: %02x\n",(int)p->scb->rsc_errs,(int)p->scb->ovrn_errs,(int)p->scb->rus,(int)p->scb->cus);
        }
        old_at_least = at_least_one;
#endif

        if(debuglevel > 0)
                printk("r");
}

/**********************************************************
 * handle 'Receiver went not ready'.
 */

static void ni52_rnr_int(struct net_device *dev)
{
        struct priv *p = (struct priv *) dev->priv;

        p->stats.rx_errors++;

        WAIT_4_SCB_CMD();               /* wait for the last cmd, WAIT_4_FULLSTAT?? */
        p->scb->cmd_ruc = RUC_ABORT; /* usually the RU is in the 'no resource'-state .. abort it now. */
        ni_attn586();
        WAIT_4_SCB_CMD_RUC();           /* wait for accept cmd. */

        alloc_rfa(dev,(char *)p->rfd_first);
/* maybe add a check here, before restarting the RU */
        startrecv586(dev); /* restart RU */

        printk("%s: Receive-Unit restarted. Status: %04x\n",dev->name,p->scb->rus);

}

/**********************************************************
 * handle xmit - interrupt
 */

static void ni52_xmt_int(struct net_device *dev)
{
        int status;
        struct priv *p = (struct priv *) dev->priv;

        if(debuglevel > 0)
                printk("X");

        status = p->xmit_cmds[p->xmit_last]->cmd_status;
        if(!(status & STAT_COMPL))
                printk("%s: strange .. xmit-int without a 'COMPLETE'\n",dev->name);

        if(status & STAT_OK)
        {
                p->stats.tx_packets++;
                p->stats.collisions += (status & TCMD_MAXCOLLMASK);
        }
        else
        {
                p->stats.tx_errors++;
                if(status & TCMD_LATECOLL) {
                        printk("%s: late collision detected.\n",dev->name);
                        p->stats.collisions++;
                }
                else if(status & TCMD_NOCARRIER) {
                        p->stats.tx_carrier_errors++;
                        printk("%s: no carrier detected.\n",dev->name);
                }
                else if(status & TCMD_LOSTCTS)
                        printk("%s: loss of CTS detected.\n",dev->name);
                else if(status & TCMD_UNDERRUN) {
                        p->stats.tx_fifo_errors++;
                        printk("%s: DMA underrun detected.\n",dev->name);
                }
                else if(status & TCMD_MAXCOLL) {
                        printk("%s: Max. collisions exceeded.\n",dev->name);
                        p->stats.collisions += 16;
                }
        }

#if (NUM_XMIT_BUFFS > 1)
        if( (++p->xmit_last) == NUM_XMIT_BUFFS)
                p->xmit_last = 0;
#endif
        netif_wake_queue(dev);
}

/***********************************************************
 * (re)start the receiver
 */

static void startrecv586(struct net_device *dev)
{
        struct priv *p = (struct priv *) dev->priv;

        WAIT_4_SCB_CMD();
        WAIT_4_SCB_CMD_RUC();
        p->scb->rfa_offset = make16(p->rfd_first);
        p->scb->cmd_ruc = RUC_START;
        ni_attn586();           /* start cmd. */
        WAIT_4_SCB_CMD_RUC();   /* wait for accept cmd. (no timeout!!) */
}

static void ni52_timeout(struct net_device *dev)
{
        struct priv *p = (struct priv *) dev->priv;
#ifndef NO_NOPCOMMANDS
        if(p->scb->cus & CU_ACTIVE) /* COMMAND-UNIT active? */
        {
                netif_wake_queue(dev);
#ifdef DEBUG
                printk("%s: strange ... timeout with CU active?!?\n",dev->name);
                printk("%s: X0: %04x N0: %04x N1: %04x %d\n",dev->name,(int)p->xmit_cmds[0]->cmd_status,(int)p->nop_cmds[0]->cmd_status,(int)p->nop_cmds[1]->cmd_status,(int)p->nop_point);
#endif
                p->scb->cmd_cuc = CUC_ABORT;
                ni_attn586();
                WAIT_4_SCB_CMD();
                p->scb->cbl_offset = make16(p->nop_cmds[p->nop_point]);
                p->scb->cmd_cuc = CUC_START;
                ni_attn586();
                WAIT_4_SCB_CMD();
                dev->trans_start = jiffies;
                return 0;
        }
#endif
        {
#ifdef DEBUG
                printk("%s: xmitter timed out, try to restart! stat: %02x\n",dev->name,p->scb->cus);
                printk("%s: command-stats: %04x %04x\n",dev->name,p->xmit_cmds[0]->cmd_status,p->xmit_cmds[1]->cmd_status);
                printk("%s: check, whether you set the right interrupt number!\n",dev->name);
#endif
                ni52_close(dev);
                ni52_open(dev);
        }
        dev->trans_start = jiffies;
}

/******************************************************
 * send frame
 */

static int ni52_send_packet(struct sk_buff *skb, struct net_device *dev)
{
        int len,i;
#ifndef NO_NOPCOMMANDS
        int next_nop;
#endif
        struct priv *p = (struct priv *) dev->priv;

        if(skb->len > XMIT_BUFF_SIZE)
        {
                printk("%s: Sorry, max. framelength is %d bytes. The length of your frame is %d bytes.\n",dev->name,XMIT_BUFF_SIZE,skb->len);
                return 0;
        }

        netif_stop_queue(dev);

#if(NUM_XMIT_BUFFS > 1)
        if(test_and_set_bit(0,(void *) &p->lock)) {
                printk("%s: Queue was locked\n",dev->name);
                return 1;
        }
        else
#endif
        {
                memcpy((char *)p->xmit_cbuffs[p->xmit_count],(char *)(skb->data),skb->len);
                len = skb->len;
                if (len < ETH_ZLEN) {
                        len = ETH_ZLEN;
                        memset((char *)p->xmit_cbuffs[p->xmit_count]+skb->len, 0, len - skb->len);
                }

#if (NUM_XMIT_BUFFS == 1)
#       ifdef NO_NOPCOMMANDS

#ifdef DEBUG
                if(p->scb->cus & CU_ACTIVE)
                {
                        printk("%s: Hmmm .. CU is still running and we wanna send a new packet.\n",dev->name);
                        printk("%s: stat: %04x %04x\n",dev->name,p->scb->cus,p->xmit_cmds[0]->cmd_status);
                }
#endif

                p->xmit_buffs[0]->size = TBD_LAST | len;
                for(i=0;i<16;i++)
                {
                        p->xmit_cmds[0]->cmd_status = 0;
                        WAIT_4_SCB_CMD();
                        if( (p->scb->cus & CU_STATUS) == CU_SUSPEND)
                                p->scb->cmd_cuc = CUC_RESUME;
                        else
                        {
                                p->scb->cbl_offset = make16(p->xmit_cmds[0]);
                                p->scb->cmd_cuc = CUC_START;
                        }

                        ni_attn586();
                        dev->trans_start = jiffies;
                        if(!i)
                                dev_kfree_skb(skb);
                        WAIT_4_SCB_CMD();
                        if( (p->scb->cus & CU_ACTIVE)) /* test it, because CU sometimes doesn't start immediately */
                                break;
                        if(p->xmit_cmds[0]->cmd_status)
                                break;
                        if(i==15)
                                printk("%s: Can't start transmit-command.\n",dev->name);
                }
#       else
                next_nop = (p->nop_point + 1) & 0x1;
                p->xmit_buffs[0]->size = TBD_LAST | len;

                p->xmit_cmds[0]->cmd_link        = p->nop_cmds[next_nop]->cmd_link
                                                                                                                                = make16((p->nop_cmds[next_nop]));
                p->xmit_cmds[0]->cmd_status = p->nop_cmds[next_nop]->cmd_status = 0;

                p->nop_cmds[p->nop_point]->cmd_link = make16((p->xmit_cmds[0]));
                dev->trans_start = jiffies;
                p->nop_point = next_nop;
                dev_kfree_skb(skb);
#       endif
#else
                p->xmit_buffs[p->xmit_count]->size = TBD_LAST | len;
                if( (next_nop = p->xmit_count + 1) == NUM_XMIT_BUFFS )
                        next_nop = 0;

                p->xmit_cmds[p->xmit_count]->cmd_status = 0;
                /* linkpointer of xmit-command already points to next nop cmd */
                p->nop_cmds[next_nop]->cmd_link = make16((p->nop_cmds[next_nop]));
                p->nop_cmds[next_nop]->cmd_status = 0;

                p->nop_cmds[p->xmit_count]->cmd_link = make16((p->xmit_cmds[p->xmit_count]));
                dev->trans_start = jiffies;
                p->xmit_count = next_nop;

                {
                        unsigned long flags;
                        save_flags(flags);
                        cli();
                        if(p->xmit_count != p->xmit_last)
                                netif_wake_queue(dev);
                        p->lock = 0;
                        restore_flags(flags);
                }
                dev_kfree_skb(skb);
#endif
        }
        return 0;
}

/*******************************************
 * Someone wanna have the statistics
 */

static struct net_device_stats *ni52_get_stats(struct net_device *dev)
{
        struct priv *p = (struct priv *) dev->priv;
        unsigned short crc,aln,rsc,ovrn;

        crc = p->scb->crc_errs; /* get error-statistic from the ni82586 */
        p->scb->crc_errs = 0;
        aln = p->scb->aln_errs;
        p->scb->aln_errs = 0;
        rsc = p->scb->rsc_errs;
        p->scb->rsc_errs = 0;
        ovrn = p->scb->ovrn_errs;
        p->scb->ovrn_errs = 0;

        p->stats.rx_crc_errors += crc;
        p->stats.rx_fifo_errors += ovrn;
        p->stats.rx_frame_errors += aln;
        p->stats.rx_dropped += rsc;

        return &p->stats;
}

/********************************************************
 * Set MC list ..
 */

static void set_multicast_list(struct net_device *dev)
{
        netif_stop_queue(dev);
        ni_disint();
        alloc586(dev);
        init586(dev);
        startrecv586(dev);
        ni_enaint();
        netif_wake_queue(dev);
}

#ifdef MODULE
static struct net_device *dev_ni52;

module_param(io, int, 0);
module_param(irq, int, 0);
module_param(memstart, long, 0);
module_param(memend, long, 0);
MODULE_PARM_DESC(io, "NI5210 I/O base address,required");
MODULE_PARM_DESC(irq, "NI5210 IRQ number,required");
MODULE_PARM_DESC(memstart, "NI5210 memory base address,required");
MODULE_PARM_DESC(memend, "NI5210 memory end address,required");

int __init init_module(void)
{
        if(io <= 0x0 || !memend || !memstart || irq < 2) {
                printk("ni52: Autoprobing not allowed for modules.\nni52: Set symbols 'io' 'irq' 'memstart' and 'memend'\n");
                return -ENODEV;
        }
        dev_ni52 = ni52_probe(-1);
        if (IS_ERR(dev_ni52))
                return PTR_ERR(dev_ni52);
        return 0;
}

void cleanup_module(void)
{
        unregister_netdev(dev_ni52);
        release_region(dev_ni52->base_addr, NI52_TOTAL_SIZE);
        free_netdev(dev_ni52);
}
#endif /* MODULE */

#if 0
/*
 * DUMP .. we expect a not running CMD unit and enough space
 */
void ni52_dump(struct net_device *dev,void *ptr)
{
        struct priv *p = (struct priv *) dev->priv;
        struct dump_cmd_struct *dump_cmd = (struct dump_cmd_struct *) ptr;
        int i;

        p->scb->cmd_cuc = CUC_ABORT;
        ni_attn586();
        WAIT_4_SCB_CMD();
        WAIT_4_SCB_CMD_RUC();

        dump_cmd->cmd_status = 0;
        dump_cmd->cmd_cmd = CMD_DUMP | CMD_LAST;
        dump_cmd->dump_offset = make16((dump_cmd + 1));
        dump_cmd->cmd_link = 0xffff;

        p->scb->cbl_offset = make16(dump_cmd);
        p->scb->cmd_cuc = CUC_START;
        ni_attn586();
        WAIT_4_STAT_COMPL(dump_cmd);

        if( (dump_cmd->cmd_status & (STAT_COMPL|STAT_OK)) != (STAT_COMPL|STAT_OK) )
                                printk("%s: Can't get dump information.\n",dev->name);

        for(i=0;i<170;i++) {
                printk("%02x ",(int) ((unsigned char *) (dump_cmd + 1))[i]);
                if(i % 24 == 23)
                        printk("\n");
        }
        printk("\n");
}
#endif
MODULE_LICENSE("GPL");

/*
 * END: linux/drivers/net/ni52.c
 */