aboutsummaryrefslogblamecommitdiffstats
path: root/drivers/net/ni52.c
blob: 8dbd6d1900b583e10c0bab764ee9651e5c2ee265 (plain) (tree)
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639









































































































                                                                                        
























































































                                                                                                                       
                                                        


























































































































































































































































































































































































































































                                                                                                                    
 




































































































































































































                                                                                                                              
                                                       

































































































                                                                                                                                        























































































































































































































































                                                                                                                                                                                           
                                                                                                 








































































































































                                                                                                                                                                  
                            










                                                                                                                             
                                















































                                                                                      
/*
 * 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 */

#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_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
	{
		skb_copy_from_linear_data(skb, (char *) p->xmit_cbuffs[p->xmit_count], 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 __exit 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
 */