aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/net/seeq8005.c
blob: 20afdc7f2b976f4c89798123b14d615e34b1fbb4 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
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
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
/* seeq8005.c: A network driver for linux. */
/*
	Based on skeleton.c,
	Written 1993-94 by Donald Becker.
	See the skeleton.c file for further copyright information.

	This software may be used and distributed according to the terms
	of the GNU General Public License, incorporated herein by reference.

	The author may be reached as hamish@zot.apana.org.au

	This file is a network device driver for the SEEQ 8005 chipset and
	the Linux operating system.

*/

static const char version[] =
	"seeq8005.c:v1.00 8/07/95 Hamish Coleman (hamish@zot.apana.org.au)\n";

/*
  Sources:
  	SEEQ 8005 databook

  Version history:
  	1.00	Public release. cosmetic changes (no warnings now)
  	0.68	Turning per- packet,interrupt debug messages off - testing for release.
  	0.67	timing problems/bad buffer reads seem to be fixed now
  	0.63	*!@$ protocol=eth_type_trans -- now packets flow
  	0.56	Send working
  	0.48	Receive working
*/

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/fcntl.h>
#include <linux/interrupt.h>
#include <linux/ioport.h>
#include <linux/in.h>
#include <linux/slab.h>
#include <linux/string.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/errno.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/skbuff.h>
#include <linux/bitops.h>
#include <linux/jiffies.h>

#include <asm/system.h>
#include <asm/io.h>
#include <asm/dma.h>

#include "seeq8005.h"

/* First, a few definitions that the brave might change. */
/* A zero-terminated list of I/O addresses to be probed. */
static unsigned int seeq8005_portlist[] __initdata =
   { 0x300, 0x320, 0x340, 0x360, 0};

/* use 0 for production, 1 for verification, >2 for debug */
#ifndef NET_DEBUG
#define NET_DEBUG 1
#endif
static unsigned int net_debug = NET_DEBUG;

/* Information that need to be kept for each board. */
struct net_local {
	struct net_device_stats stats;
	unsigned short receive_ptr;		/* What address in packet memory do we expect a recv_pkt_header? */
	long open_time;				/* Useless example local info. */
};

/* The station (ethernet) address prefix, used for IDing the board. */
#define SA_ADDR0 0x00
#define SA_ADDR1 0x80
#define SA_ADDR2 0x4b

/* Index to functions, as function prototypes. */

static int seeq8005_probe1(struct net_device *dev, int ioaddr);
static int seeq8005_open(struct net_device *dev);
static void seeq8005_timeout(struct net_device *dev);
static int seeq8005_send_packet(struct sk_buff *skb, struct net_device *dev);
static irqreturn_t seeq8005_interrupt(int irq, void *dev_id, struct pt_regs *regs);
static void seeq8005_rx(struct net_device *dev);
static int seeq8005_close(struct net_device *dev);
static struct net_device_stats *seeq8005_get_stats(struct net_device *dev);
static void set_multicast_list(struct net_device *dev);

/* Example routines you must write ;->. */
#define tx_done(dev)	(inw(SEEQ_STATUS) & SEEQSTAT_TX_ON)
static void hardware_send_packet(struct net_device *dev, char *buf, int length);
extern void seeq8005_init(struct net_device *dev, int startp);
static inline void wait_for_buffer(struct net_device *dev);


/* Check for a network adaptor of this type, and return '0' iff one exists.
   If dev->base_addr == 0, probe all likely locations.
   If dev->base_addr == 1, always return failure.
   */

static int io = 0x320;
static int irq = 10;

struct net_device * __init seeq8005_probe(int unit)
{
	struct net_device *dev = alloc_etherdev(sizeof(struct net_local));
	unsigned *port;
	int err = 0;

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

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

	if (io > 0x1ff) {	/* Check a single specified location. */
		err = seeq8005_probe1(dev, io);
	} else if (io != 0) {	/* Don't probe at all. */
		err = -ENXIO;
	} else {
		for (port = seeq8005_portlist; *port; port++) {
			if (seeq8005_probe1(dev, *port) == 0)
				break;
		}
		if (!*port)
			err = -ENODEV;
	}
	if (err)
		goto out;
	err = register_netdev(dev);
	if (err)
		goto out1;
	return dev;
out1:
	release_region(dev->base_addr, SEEQ8005_IO_EXTENT);
out:
	free_netdev(dev);
	return ERR_PTR(err);
}

/* This is the real probe routine.  Linux has a history of friendly device
   probes on the ISA bus.  A good device probes avoids doing writes, and
   verifies that the correct device exists and functions.  */

static int __init seeq8005_probe1(struct net_device *dev, int ioaddr)
{
	static unsigned version_printed;
	int i,j;
	unsigned char SA_prom[32];
	int old_cfg1;
	int old_cfg2;
	int old_stat;
	int old_dmaar;
	int old_rear;
	int retval;

	if (!request_region(ioaddr, SEEQ8005_IO_EXTENT, "seeq8005"))
		return -ENODEV;

	if (net_debug>1)
		printk("seeq8005: probing at 0x%x\n",ioaddr);

	old_stat = inw(SEEQ_STATUS);					/* read status register */
	if (old_stat == 0xffff) {
		retval = -ENODEV;
		goto out;						/* assume that 0xffff == no device */
	}
	if ( (old_stat & 0x1800) != 0x1800 ) {				/* assume that unused bits are 1, as my manual says */
		if (net_debug>1) {
			printk("seeq8005: reserved stat bits != 0x1800\n");
			printk("          == 0x%04x\n",old_stat);
		}
	 	retval = -ENODEV;
		goto out;
	}

	old_rear = inw(SEEQ_REA);
	if (old_rear == 0xffff) {
		outw(0,SEEQ_REA);
		if (inw(SEEQ_REA) == 0xffff) {				/* assume that 0xffff == no device */
			retval = -ENODEV;
			goto out;
		}
	} else if ((old_rear & 0xff00) != 0xff00) {			/* assume that unused bits are 1 */
		if (net_debug>1) {
			printk("seeq8005: unused rear bits != 0xff00\n");
			printk("          == 0x%04x\n",old_rear);
		}
		retval = -ENODEV;
		goto out;
	}

	old_cfg2 = inw(SEEQ_CFG2);					/* read CFG2 register */
	old_cfg1 = inw(SEEQ_CFG1);
	old_dmaar = inw(SEEQ_DMAAR);

	if (net_debug>4) {
		printk("seeq8005: stat = 0x%04x\n",old_stat);
		printk("seeq8005: cfg1 = 0x%04x\n",old_cfg1);
		printk("seeq8005: cfg2 = 0x%04x\n",old_cfg2);
		printk("seeq8005: raer = 0x%04x\n",old_rear);
		printk("seeq8005: dmaar= 0x%04x\n",old_dmaar);
	}

	outw( SEEQCMD_FIFO_WRITE | SEEQCMD_SET_ALL_OFF, SEEQ_CMD);	/* setup for reading PROM */
	outw( 0, SEEQ_DMAAR);						/* set starting PROM address */
	outw( SEEQCFG1_BUFFER_PROM, SEEQ_CFG1);				/* set buffer to look at PROM */


	j=0;
	for(i=0; i <32; i++) {
		j+= SA_prom[i] = inw(SEEQ_BUFFER) & 0xff;
	}

#if 0
	/* untested because I only have the one card */
	if ( (j&0xff) != 0 ) {						/* checksum appears to be 8bit = 0 */
		if (net_debug>1) {					/* check this before deciding that we have a card */
			printk("seeq8005: prom sum error\n");
		}
		outw( old_stat, SEEQ_STATUS);
		outw( old_dmaar, SEEQ_DMAAR);
		outw( old_cfg1, SEEQ_CFG1);
		retval = -ENODEV;
		goto out;
	}
#endif

	outw( SEEQCFG2_RESET, SEEQ_CFG2);				/* reset the card */
	udelay(5);
	outw( SEEQCMD_SET_ALL_OFF, SEEQ_CMD);

	if (net_debug) {
		printk("seeq8005: prom sum = 0x%08x\n",j);
		for(j=0; j<32; j+=16) {
			printk("seeq8005: prom %02x: ",j);
			for(i=0;i<16;i++) {
				printk("%02x ",SA_prom[j|i]);
			}
			printk(" ");
			for(i=0;i<16;i++) {
				if ((SA_prom[j|i]>31)&&(SA_prom[j|i]<127)) {
					printk("%c", SA_prom[j|i]);
				} else {
					printk(" ");
				}
			}
			printk("\n");
		}
	}

#if 0
	/*
	 * testing the packet buffer memory doesn't work yet
	 * but all other buffer accesses do
	 *			- fixing is not a priority
	 */
	if (net_debug>1) {					/* test packet buffer memory */
		printk("seeq8005: testing packet buffer ... ");
		outw( SEEQCFG1_BUFFER_BUFFER, SEEQ_CFG1);
		outw( SEEQCMD_FIFO_WRITE | SEEQCMD_SET_ALL_OFF, SEEQ_CMD);
		outw( 0 , SEEQ_DMAAR);
		for(i=0;i<32768;i++) {
			outw(0x5a5a, SEEQ_BUFFER);
		}
		j=jiffies+HZ;
		while ( ((inw(SEEQ_STATUS) & SEEQSTAT_FIFO_EMPTY) != SEEQSTAT_FIFO_EMPTY) && time_before(jiffies, j) )
			mb();
		outw( 0 , SEEQ_DMAAR);
		while ( ((inw(SEEQ_STATUS) & SEEQSTAT_WINDOW_INT) != SEEQSTAT_WINDOW_INT) && time_before(jiffies, j+HZ))
			mb();
		if ( (inw(SEEQ_STATUS) & SEEQSTAT_WINDOW_INT) == SEEQSTAT_WINDOW_INT)
			outw( SEEQCMD_WINDOW_INT_ACK | (inw(SEEQ_STATUS)& SEEQCMD_INT_MASK), SEEQ_CMD);
		outw( SEEQCMD_FIFO_READ | SEEQCMD_SET_ALL_OFF, SEEQ_CMD);
		j=0;
		for(i=0;i<32768;i++) {
			if (inw(SEEQ_BUFFER) != 0x5a5a)
				j++;
		}
		if (j) {
			printk("%i\n",j);
		} else {
			printk("ok.\n");
		}
	}
#endif

	if (net_debug  &&  version_printed++ == 0)
		printk(version);

	printk("%s: %s found at %#3x, ", dev->name, "seeq8005", ioaddr);

	/* Fill in the 'dev' fields. */
	dev->base_addr = ioaddr;
	dev->irq = irq;

	/* Retrieve and print the ethernet address. */
	for (i = 0; i < 6; i++)
		printk(" %2.2x", dev->dev_addr[i] = SA_prom[i+6]);

	if (dev->irq == 0xff)
		;			/* Do nothing: a user-level program will set it. */
	else if (dev->irq < 2) {	/* "Auto-IRQ" */
		unsigned long cookie = probe_irq_on();

		outw( SEEQCMD_RX_INT_EN | SEEQCMD_SET_RX_ON | SEEQCMD_SET_RX_OFF, SEEQ_CMD );

		dev->irq = probe_irq_off(cookie);

		if (net_debug >= 2)
			printk(" autoirq is %d\n", dev->irq);
	} else if (dev->irq == 2)
	  /* Fixup for users that don't know that IRQ 2 is really IRQ 9,
	   * or don't know which one to set.
	   */
	  dev->irq = 9;

#if 0
	{
		 int irqval = request_irq(dev->irq, &seeq8005_interrupt, 0, "seeq8005", dev);
		 if (irqval) {
			 printk ("%s: unable to get IRQ %d (irqval=%d).\n", dev->name,
					 dev->irq, irqval);
			 retval = -EAGAIN;
			 goto out;
		 }
	}
#endif
	dev->open		= seeq8005_open;
	dev->stop		= seeq8005_close;
	dev->hard_start_xmit 	= seeq8005_send_packet;
	dev->tx_timeout		= seeq8005_timeout;
	dev->watchdog_timeo	= HZ/20;
	dev->get_stats		= seeq8005_get_stats;
	dev->set_multicast_list = set_multicast_list;
	dev->flags &= ~IFF_MULTICAST;

	return 0;
out:
	release_region(ioaddr, SEEQ8005_IO_EXTENT);
	return retval;
}


/* Open/initialize the board.  This is called (in the current kernel)
   sometime after booting when the 'ifconfig' program is run.

   This routine should set everything up anew at each open, even
   registers that "should" only need to be set once at boot, so that
   there is non-reboot way to recover if something goes wrong.
   */
static int seeq8005_open(struct net_device *dev)
{
	struct net_local *lp = netdev_priv(dev);

	{
		 int irqval = request_irq(dev->irq, &seeq8005_interrupt, 0, "seeq8005", dev);
		 if (irqval) {
			 printk ("%s: unable to get IRQ %d (irqval=%d).\n", dev->name,
					 dev->irq, irqval);
			 return -EAGAIN;
		 }
	}

	/* Reset the hardware here.  Don't forget to set the station address. */
	seeq8005_init(dev, 1);

	lp->open_time = jiffies;

	netif_start_queue(dev);
	return 0;
}

static void seeq8005_timeout(struct net_device *dev)
{
	int ioaddr = dev->base_addr;
	printk(KERN_WARNING "%s: transmit timed out, %s?\n", dev->name,
		   tx_done(dev) ? "IRQ conflict" : "network cable problem");
	/* Try to restart the adaptor. */
	seeq8005_init(dev, 1);
	dev->trans_start = jiffies;
	netif_wake_queue(dev);
}

static int seeq8005_send_packet(struct sk_buff *skb, struct net_device *dev)
{
	struct net_local *lp = netdev_priv(dev);
	short length = skb->len;
	unsigned char *buf;

	if (length < ETH_ZLEN) {
		if (skb_padto(skb, ETH_ZLEN))
			return 0;
		length = ETH_ZLEN;
	}
	buf = skb->data;

	/* Block a timer-based transmit from overlapping */
	netif_stop_queue(dev);

	hardware_send_packet(dev, buf, length);
	dev->trans_start = jiffies;
	lp->stats.tx_bytes += length;
	dev_kfree_skb (skb);
	/* You might need to clean up and record Tx statistics here. */

	return 0;
}

/*
 * wait_for_buffer
 *
 * This routine waits for the SEEQ chip to assert that the FIFO is ready
 * by checking for a window interrupt, and then clearing it. This has to
 * occur in the interrupt handler!
 */
inline void wait_for_buffer(struct net_device * dev)
{
	int ioaddr = dev->base_addr;
	unsigned long tmp;
	int status;

	tmp = jiffies + HZ;
	while ( ( ((status=inw(SEEQ_STATUS)) & SEEQSTAT_WINDOW_INT) != SEEQSTAT_WINDOW_INT) && time_before(jiffies, tmp))
		cpu_relax();

	if ( (status & SEEQSTAT_WINDOW_INT) == SEEQSTAT_WINDOW_INT)
		outw( SEEQCMD_WINDOW_INT_ACK | (status & SEEQCMD_INT_MASK), SEEQ_CMD);
}

/* The typical workload of the driver:
   Handle the network interface interrupts. */
static irqreturn_t seeq8005_interrupt(int irq, void *dev_id, struct pt_regs * regs)
{
	struct net_device *dev = dev_id;
	struct net_local *lp;
	int ioaddr, status, boguscount = 0;
	int handled = 0;

	ioaddr = dev->base_addr;
	lp = netdev_priv(dev);

	status = inw(SEEQ_STATUS);
	do {
		if (net_debug >2) {
			printk("%s: int, status=0x%04x\n",dev->name,status);
		}

		if (status & SEEQSTAT_WINDOW_INT) {
			handled = 1;
			outw( SEEQCMD_WINDOW_INT_ACK | (status & SEEQCMD_INT_MASK), SEEQ_CMD);
			if (net_debug) {
				printk("%s: window int!\n",dev->name);
			}
		}
		if (status & SEEQSTAT_TX_INT) {
			handled = 1;
			outw( SEEQCMD_TX_INT_ACK | (status & SEEQCMD_INT_MASK), SEEQ_CMD);
			lp->stats.tx_packets++;
			netif_wake_queue(dev);	/* Inform upper layers. */
		}
		if (status & SEEQSTAT_RX_INT) {
			handled = 1;
			/* Got a packet(s). */
			seeq8005_rx(dev);
		}
		status = inw(SEEQ_STATUS);
	} while ( (++boguscount < 10) && (status & SEEQSTAT_ANY_INT)) ;

	if(net_debug>2) {
		printk("%s: eoi\n",dev->name);
	}
	return IRQ_RETVAL(handled);
}

/* We have a good packet(s), get it/them out of the buffers. */
static void seeq8005_rx(struct net_device *dev)
{
	struct net_local *lp = netdev_priv(dev);
	int boguscount = 10;
	int pkt_hdr;
	int ioaddr = dev->base_addr;

	do {
		int next_packet;
		int pkt_len;
		int i;
		int status;

		status = inw(SEEQ_STATUS);
	  	outw( lp->receive_ptr, SEEQ_DMAAR);
		outw(SEEQCMD_FIFO_READ | SEEQCMD_RX_INT_ACK | (status & SEEQCMD_INT_MASK), SEEQ_CMD);
	  	wait_for_buffer(dev);
	  	next_packet = ntohs(inw(SEEQ_BUFFER));
	  	pkt_hdr = inw(SEEQ_BUFFER);

		if (net_debug>2) {
			printk("%s: 0x%04x recv next=0x%04x, hdr=0x%04x\n",dev->name,lp->receive_ptr,next_packet,pkt_hdr);
		}

		if ((next_packet == 0) || ((pkt_hdr & SEEQPKTH_CHAIN)==0)) {	/* Read all the frames? */
			return;							/* Done for now */
		}

		if ((pkt_hdr & SEEQPKTS_DONE)==0)
			break;

		if (next_packet < lp->receive_ptr) {
			pkt_len = (next_packet + 0x10000 - ((DEFAULT_TEA+1)<<8)) - lp->receive_ptr - 4;
		} else {
			pkt_len = next_packet - lp->receive_ptr - 4;
		}

		if (next_packet < ((DEFAULT_TEA+1)<<8)) {			/* is the next_packet address sane? */
			printk("%s: recv packet ring corrupt, resetting board\n",dev->name);
			seeq8005_init(dev,1);
			return;
		}

		lp->receive_ptr = next_packet;

		if (net_debug>2) {
			printk("%s: recv len=0x%04x\n",dev->name,pkt_len);
		}

		if (pkt_hdr & SEEQPKTS_ANY_ERROR) {				/* There was an error. */
			lp->stats.rx_errors++;
			if (pkt_hdr & SEEQPKTS_SHORT) lp->stats.rx_frame_errors++;
			if (pkt_hdr & SEEQPKTS_DRIB) lp->stats.rx_frame_errors++;
			if (pkt_hdr & SEEQPKTS_OVERSIZE) lp->stats.rx_over_errors++;
			if (pkt_hdr & SEEQPKTS_CRC_ERR) lp->stats.rx_crc_errors++;
			/* skip over this packet */
			outw( SEEQCMD_FIFO_WRITE | SEEQCMD_DMA_INT_ACK | (status & SEEQCMD_INT_MASK), SEEQ_CMD);
			outw( (lp->receive_ptr & 0xff00)>>8, SEEQ_REA);
		} else {
			/* Malloc up new buffer. */
			struct sk_buff *skb;
			unsigned char *buf;

			skb = dev_alloc_skb(pkt_len);
			if (skb == NULL) {
				printk("%s: Memory squeeze, dropping packet.\n", dev->name);
				lp->stats.rx_dropped++;
				break;
			}
			skb->dev = dev;
			skb_reserve(skb, 2);	/* align data on 16 byte */
			buf = skb_put(skb,pkt_len);

			insw(SEEQ_BUFFER, buf, (pkt_len + 1) >> 1);

			if (net_debug>2) {
				char * p = buf;
				printk("%s: recv ",dev->name);
				for(i=0;i<14;i++) {
					printk("%02x ",*(p++)&0xff);
				}
				printk("\n");
			}

			skb->protocol=eth_type_trans(skb,dev);
			netif_rx(skb);
			dev->last_rx = jiffies;
			lp->stats.rx_packets++;
			lp->stats.rx_bytes += pkt_len;
		}
	} while ((--boguscount) && (pkt_hdr & SEEQPKTH_CHAIN));

	/* If any worth-while packets have been received, netif_rx()
	   has done a mark_bh(NET_BH) for us and will work on them
	   when we get to the bottom-half routine. */
	return;
}

/* The inverse routine to net_open(). */
static int seeq8005_close(struct net_device *dev)
{
	struct net_local *lp = netdev_priv(dev);
	int ioaddr = dev->base_addr;

	lp->open_time = 0;

	netif_stop_queue(dev);

	/* Flush the Tx and disable Rx here. */
	outw( SEEQCMD_SET_ALL_OFF, SEEQ_CMD);

	free_irq(dev->irq, dev);

	/* Update the statistics here. */

	return 0;

}

/* Get the current statistics.	This may be called with the card open or
   closed. */
static struct net_device_stats *seeq8005_get_stats(struct net_device *dev)
{
	struct net_local *lp = netdev_priv(dev);

	return &lp->stats;
}

/* Set or clear the multicast filter for this adaptor.
   num_addrs == -1	Promiscuous mode, receive all packets
   num_addrs == 0	Normal mode, clear multicast list
   num_addrs > 0	Multicast mode, receive normal and MC packets, and do
			best-effort filtering.
 */
static void set_multicast_list(struct net_device *dev)
{
/*
 * I _could_ do up to 6 addresses here, but won't (yet?)
 */

#if 0
	int ioaddr = dev->base_addr;
/*
 * hmm, not even sure if my matching works _anyway_ - seem to be receiving
 * _everything_ . . .
 */

	if (num_addrs) {			/* Enable promiscuous mode */
		outw( (inw(SEEQ_CFG1) & ~SEEQCFG1_MATCH_MASK)| SEEQCFG1_MATCH_ALL,  SEEQ_CFG1);
		dev->flags|=IFF_PROMISC;
	} else {				/* Disable promiscuous mode, use normal mode */
		outw( (inw(SEEQ_CFG1) & ~SEEQCFG1_MATCH_MASK)| SEEQCFG1_MATCH_BROAD, SEEQ_CFG1);
	}
#endif
}

void seeq8005_init(struct net_device *dev, int startp)
{
	struct net_local *lp = netdev_priv(dev);
	int ioaddr = dev->base_addr;
	int i;

	outw(SEEQCFG2_RESET, SEEQ_CFG2);	/* reset device */
	udelay(5);

	outw( SEEQCMD_FIFO_WRITE | SEEQCMD_SET_ALL_OFF, SEEQ_CMD);
	outw( 0, SEEQ_DMAAR);			/* load start address into both low and high byte */
/*	wait_for_buffer(dev); */		/* I think that you only need a wait for memory buffer */
	outw( SEEQCFG1_BUFFER_MAC0, SEEQ_CFG1);

	for(i=0;i<6;i++) {			/* set Station address */
		outb(dev->dev_addr[i], SEEQ_BUFFER);
		udelay(2);
	}

	outw( SEEQCFG1_BUFFER_TEA, SEEQ_CFG1);	/* set xmit end area pointer to 16K */
	outb( DEFAULT_TEA, SEEQ_BUFFER);	/* this gives us 16K of send buffer and 48K of recv buffer */

	lp->receive_ptr = (DEFAULT_TEA+1)<<8;	/* so we can find our packet_header */
	outw( lp->receive_ptr, SEEQ_RPR);	/* Receive Pointer Register is set to recv buffer memory */

	outw( 0x00ff, SEEQ_REA);		/* Receive Area End */

	if (net_debug>4) {
		printk("%s: SA0 = ",dev->name);

		outw( SEEQCMD_FIFO_READ | SEEQCMD_SET_ALL_OFF, SEEQ_CMD);
		outw( 0, SEEQ_DMAAR);
		outw( SEEQCFG1_BUFFER_MAC0, SEEQ_CFG1);

		for(i=0;i<6;i++) {
			printk("%02x ",inb(SEEQ_BUFFER));
		}
		printk("\n");
	}

	outw( SEEQCFG1_MAC0_EN | SEEQCFG1_MATCH_BROAD | SEEQCFG1_BUFFER_BUFFER, SEEQ_CFG1);
	outw( SEEQCFG2_AUTO_REA | SEEQCFG2_CTRLO, SEEQ_CFG2);
	outw( SEEQCMD_SET_RX_ON | SEEQCMD_TX_INT_EN | SEEQCMD_RX_INT_EN, SEEQ_CMD);

	if (net_debug>4) {
		int old_cfg1;
		old_cfg1 = inw(SEEQ_CFG1);
		printk("%s: stat = 0x%04x\n",dev->name,inw(SEEQ_STATUS));
		printk("%s: cfg1 = 0x%04x\n",dev->name,old_cfg1);
		printk("%s: cfg2 = 0x%04x\n",dev->name,inw(SEEQ_CFG2));
		printk("%s: raer = 0x%04x\n",dev->name,inw(SEEQ_REA));
		printk("%s: dmaar= 0x%04x\n",dev->name,inw(SEEQ_DMAAR));

	}
}


static void hardware_send_packet(struct net_device * dev, char *buf, int length)
{
	int ioaddr = dev->base_addr;
	int status = inw(SEEQ_STATUS);
	int transmit_ptr = 0;
	unsigned long tmp;

	if (net_debug>4) {
		printk("%s: send 0x%04x\n",dev->name,length);
	}

	/* Set FIFO to writemode and set packet-buffer address */
	outw( SEEQCMD_FIFO_WRITE | (status & SEEQCMD_INT_MASK), SEEQ_CMD);
	outw( transmit_ptr, SEEQ_DMAAR);

	/* output SEEQ Packet header barfage */
	outw( htons(length + 4), SEEQ_BUFFER);
	outw( SEEQPKTH_XMIT | SEEQPKTH_DATA_FOLLOWS | SEEQPKTH_XMIT_INT_EN, SEEQ_BUFFER );

	/* blat the buffer */
	outsw( SEEQ_BUFFER, buf, (length +1) >> 1);
	/* paranoia !! */
	outw( 0, SEEQ_BUFFER);
	outw( 0, SEEQ_BUFFER);

	/* set address of start of transmit chain */
	outw( transmit_ptr, SEEQ_TPR);

	/* drain FIFO */
	tmp = jiffies;
	while ( (((status=inw(SEEQ_STATUS)) & SEEQSTAT_FIFO_EMPTY) == 0) && time_before(jiffies, tmp + HZ))
		mb();

	/* doit ! */
	outw( SEEQCMD_WINDOW_INT_ACK | SEEQCMD_SET_TX_ON | (status & SEEQCMD_INT_MASK), SEEQ_CMD);

}


#ifdef MODULE

static struct net_device *dev_seeq;
MODULE_LICENSE("GPL");
module_param(io, int, 0);
module_param(irq, int, 0);
MODULE_PARM_DESC(io, "SEEQ 8005 I/O base address");
MODULE_PARM_DESC(irq, "SEEQ 8005 IRQ number");

int __init init_module(void)
{
	dev_seeq = seeq8005_probe(-1);
	if (IS_ERR(dev_seeq))
		return PTR_ERR(dev_seeq);
	return 0;
}

void cleanup_module(void)
{
	unregister_netdev(dev_seeq);
	release_region(dev_seeq->base_addr, SEEQ8005_IO_EXTENT);
	free_netdev(dev_seeq);
}

#endif /* MODULE */

/*
 * Local variables:
 *  compile-command: "gcc -D__KERNEL__ -I/usr/src/linux/net/inet -Wall -Wstrict-prototypes -O6 -m486 -c skeleton.c"
 *  version-control: t
 *  kept-new-versions: 5
 *  tab-width: 4
 * End:
 */