aboutsummaryrefslogtreecommitdiff
path: root/drivers/net/mac8390.c
blob: f8fa0c3f0f6408d5761f17f402372f0e9a49a8ee (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
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
/* mac8390.c: New driver for 8390-based Nubus (or Nubus-alike)
   Ethernet cards on Linux */
/* Based on the former daynaport.c driver, by Alan Cox.  Some code
   taken from or inspired by skeleton.c by Donald Becker, acenic.c by
   Jes Sorensen, and ne2k-pci.c by Donald Becker and Paul Gortmaker.

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

/* 2000-02-28: support added for Dayna and Kinetics cards by
   A.G.deWijn@phys.uu.nl */
/* 2000-04-04: support added for Dayna2 by bart@etpmod.phys.tue.nl */
/* 2001-04-18: support for DaynaPort E/LC-M by rayk@knightsmanor.org */
/* 2001-05-15: support for Cabletron ported from old daynaport driver
 * and fixed access to Sonic Sys card which masquerades as a Farallon
 * by rayk@knightsmanor.org */
/* 2002-12-30: Try to support more cards, some clues from NetBSD driver */
/* 2003-12-26: Make sure Asante cards always work. */

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

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

static char version[] =
	"mac8390.c: v0.4 2001-05-15 David Huggins-Daines <dhd@debian.org> and others\n";

#define EI_SHIFT(x)	(ei_local->reg_offset[x])
#define ei_inb(port)   in_8(port)
#define ei_outb(val,port)  out_8(port,val)
#define ei_inb_p(port)   in_8(port)
#define ei_outb_p(val,port)  out_8(port,val)

#include "lib8390.c"

#define WD_START_PG			0x00	/* First page of TX buffer */
#define CABLETRON_RX_START_PG		0x00    /* First page of RX buffer */
#define CABLETRON_RX_STOP_PG		0x30    /* Last page +1 of RX ring */
#define CABLETRON_TX_START_PG		CABLETRON_RX_STOP_PG  /* First page of TX buffer */

/* Unfortunately it seems we have to hardcode these for the moment */
/* Shouldn't the card know about this? Does anyone know where to read it off the card? Do we trust the data provided by the card? */

#define DAYNA_8390_BASE		0x80000
#define DAYNA_8390_MEM		0x00000

#define CABLETRON_8390_BASE	0x90000
#define CABLETRON_8390_MEM	0x00000

#define INTERLAN_8390_BASE	0xE0000
#define INTERLAN_8390_MEM	0xD0000

enum mac8390_type {
	MAC8390_NONE = -1,
	MAC8390_APPLE,
	MAC8390_ASANTE,
	MAC8390_FARALLON,
	MAC8390_CABLETRON,
	MAC8390_DAYNA,
	MAC8390_INTERLAN,
	MAC8390_KINETICS,
};

static const char * cardname[] = {
	"apple",
	"asante",
	"farallon",
	"cabletron",
	"dayna",
	"interlan",
	"kinetics",
};

static int word16[] = {
	1, /* apple */
	1, /* asante */
	1, /* farallon */
	1, /* cabletron */
	0, /* dayna */
	1, /* interlan */
	0, /* kinetics */
};

/* on which cards do we use NuBus resources? */
static int useresources[] = {
	1, /* apple */
	1, /* asante */
	1, /* farallon */
	0, /* cabletron */
	0, /* dayna */
	0, /* interlan */
	0, /* kinetics */
};

enum mac8390_access {
	ACCESS_UNKNOWN = 0,
	ACCESS_32,
	ACCESS_16,
};

extern int mac8390_memtest(struct net_device * dev);
static int mac8390_initdev(struct net_device * dev, struct nubus_dev * ndev,
			   enum mac8390_type type);

static int mac8390_open(struct net_device * dev);
static int mac8390_close(struct net_device * dev);
static void mac8390_no_reset(struct net_device *dev);
static void interlan_reset(struct net_device *dev);

/* Sane (32-bit chunk memory read/write) - Some Farallon and Apple do this*/
static void sane_get_8390_hdr(struct net_device *dev,
			      struct e8390_pkt_hdr *hdr, int ring_page);
static void sane_block_input(struct net_device * dev, int count,
			     struct sk_buff * skb, int ring_offset);
static void sane_block_output(struct net_device * dev, int count,
			      const unsigned char * buf, const int start_page);

/* dayna_memcpy to and from card */
static void dayna_memcpy_fromcard(struct net_device *dev, void *to,
				int from, int count);
static void dayna_memcpy_tocard(struct net_device *dev, int to,
			      const void *from, int count);

/* Dayna - Dayna/Kinetics use this */
static void dayna_get_8390_hdr(struct net_device *dev,
			       struct e8390_pkt_hdr *hdr, int ring_page);
static void dayna_block_input(struct net_device *dev, int count,
			      struct sk_buff *skb, int ring_offset);
static void dayna_block_output(struct net_device *dev, int count,
			       const unsigned char *buf, int start_page);

#define memcpy_fromio(a,b,c)	memcpy((a),(void *)(b),(c))
#define memcpy_toio(a,b,c)	memcpy((void *)(a),(b),(c))

/* Slow Sane (16-bit chunk memory read/write) Cabletron uses this */
static void slow_sane_get_8390_hdr(struct net_device *dev,
				   struct e8390_pkt_hdr *hdr, int ring_page);
static void slow_sane_block_input(struct net_device *dev, int count,
				  struct sk_buff *skb, int ring_offset);
static void slow_sane_block_output(struct net_device *dev, int count,
				   const unsigned char *buf, int start_page);
static void word_memcpy_tocard(void *tp, const void *fp, int count);
static void word_memcpy_fromcard(void *tp, const void *fp, int count);

static enum mac8390_type __init mac8390_ident(struct nubus_dev *dev)
{
	switch (dev->dr_sw) {
		case NUBUS_DRSW_3COM:
			switch (dev->dr_hw) {
				case NUBUS_DRHW_APPLE_SONIC_NB:
				case NUBUS_DRHW_APPLE_SONIC_LC:
				case NUBUS_DRHW_SONNET:
					return MAC8390_NONE;
					break;
				default:
					return MAC8390_APPLE;
					break;
			}
			break;

		case NUBUS_DRSW_APPLE:
			switch (dev->dr_hw) {
				case NUBUS_DRHW_ASANTE_LC:
					return MAC8390_NONE;
					break;
				case NUBUS_DRHW_CABLETRON:
					return MAC8390_CABLETRON;
					break;
				default:
					return MAC8390_APPLE;
					break;
			}
			break;

		case NUBUS_DRSW_ASANTE:
			return MAC8390_ASANTE;
			break;

		case NUBUS_DRSW_TECHWORKS:
		case NUBUS_DRSW_DAYNA2:
		case NUBUS_DRSW_DAYNA_LC:
			if (dev->dr_hw == NUBUS_DRHW_CABLETRON)
				return MAC8390_CABLETRON;
			else
				return MAC8390_APPLE;
			break;

		case NUBUS_DRSW_FARALLON:
			return MAC8390_FARALLON;
			break;

		case NUBUS_DRSW_KINETICS:
			switch (dev->dr_hw) {
				case NUBUS_DRHW_INTERLAN:
					return MAC8390_INTERLAN;
					break;
				default:
					return MAC8390_KINETICS;
					break;
			}
			break;

		case NUBUS_DRSW_DAYNA:
			// These correspond to Dayna Sonic cards
			// which use the macsonic driver
			if (dev->dr_hw == NUBUS_DRHW_SMC9194 ||
				dev->dr_hw == NUBUS_DRHW_INTERLAN )
				return MAC8390_NONE;
			else
				return MAC8390_DAYNA;
			break;
	}
	return MAC8390_NONE;
}

static enum mac8390_access __init mac8390_testio(volatile unsigned long membase)
{
	unsigned long outdata = 0xA5A0B5B0;
	unsigned long indata =  0x00000000;
	/* Try writing 32 bits */
	memcpy((char *)membase, (char *)&outdata, 4);
	/* Now compare them */
	if (memcmp((char *)&outdata, (char *)membase, 4) == 0)
		return ACCESS_32;
	/* Write 16 bit output */
	word_memcpy_tocard((char *)membase, (char *)&outdata, 4);
	/* Now read it back */
	word_memcpy_fromcard((char *)&indata, (char *)membase, 4);
	if (outdata == indata)
		return ACCESS_16;
	return ACCESS_UNKNOWN;
}

static int __init mac8390_memsize(unsigned long membase)
{
	unsigned long flags;
	int i, j;

	local_irq_save(flags);
	/* Check up to 32K in 4K increments */
	for (i = 0; i < 8; i++) {
		volatile unsigned short *m = (unsigned short *) (membase + (i * 0x1000));

		/* Unwriteable - we have a fully decoded card and the
		   RAM end located */
		if (hwreg_present(m) == 0)
			break;

		/* write a distinctive byte */
		*m = 0xA5A0 | i;
		/* check that we read back what we wrote */
		if (*m != (0xA5A0 | i))
			break;

		/* check for partial decode and wrap */
		for (j = 0; j < i; j++) {
			volatile unsigned short *p = (unsigned short *) (membase + (j * 0x1000));
			if (*p != (0xA5A0 | j))
				break;
 		}
 	}
	local_irq_restore(flags);
	/* in any case, we stopped once we tried one block too many,
           or once we reached 32K */
 	return i * 0x1000;
}

struct net_device * __init mac8390_probe(int unit)
{
	struct net_device *dev;
	volatile unsigned short *i;
	int version_disp = 0;
	struct nubus_dev * ndev = NULL;
	int err = -ENODEV;

	struct nubus_dir dir;
	struct nubus_dirent ent;
	int offset;
	static unsigned int slots;

	enum mac8390_type cardtype;

	/* probably should check for Nubus instead */

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

	dev = ____alloc_ei_netdev(0);
	if (!dev)
		return ERR_PTR(-ENOMEM);

	if (unit >= 0)
		sprintf(dev->name, "eth%d", unit);

	while ((ndev = nubus_find_type(NUBUS_CAT_NETWORK, NUBUS_TYPE_ETHERNET, ndev))) {
		/* Have we seen it already? */
		if (slots & (1<<ndev->board->slot))
			continue;
		slots |= 1<<ndev->board->slot;

		if ((cardtype = mac8390_ident(ndev)) == MAC8390_NONE)
			continue;

		if (version_disp == 0) {
			version_disp = 1;
			printk(version);
		}

		dev->irq = SLOT2IRQ(ndev->board->slot);
		/* This is getting to be a habit */
		dev->base_addr = ndev->board->slot_addr | ((ndev->board->slot&0xf) << 20);

		/* Get some Nubus info - we will trust the card's idea
		   of where its memory and registers are. */

		if (nubus_get_func_dir(ndev, &dir) == -1) {
			printk(KERN_ERR "%s: Unable to get Nubus functional"
					" directory for slot %X!\n",
			       dev->name, ndev->board->slot);
			continue;
		}

		/* Get the MAC address */
		if ((nubus_find_rsrc(&dir, NUBUS_RESID_MAC_ADDRESS, &ent)) == -1) {
			printk(KERN_INFO "%s: Couldn't get MAC address!\n",
					dev->name);
			continue;
		} else {
			nubus_get_rsrc_mem(dev->dev_addr, &ent, 6);
		}

		if (useresources[cardtype] == 1) {
			nubus_rewinddir(&dir);
			if (nubus_find_rsrc(&dir, NUBUS_RESID_MINOR_BASEOS, &ent) == -1) {
				printk(KERN_ERR "%s: Memory offset resource"
						" for slot %X not found!\n",
				       dev->name, ndev->board->slot);
				continue;
			}
			nubus_get_rsrc_mem(&offset, &ent, 4);
			dev->mem_start = dev->base_addr + offset;
			/* yes, this is how the Apple driver does it */
			dev->base_addr = dev->mem_start + 0x10000;
			nubus_rewinddir(&dir);
			if (nubus_find_rsrc(&dir, NUBUS_RESID_MINOR_LENGTH, &ent) == -1) {
				printk(KERN_INFO "%s: Memory length resource"
						 " for slot %X not found"
						 ", probing\n",
				       dev->name, ndev->board->slot);
				offset = mac8390_memsize(dev->mem_start);
				} else {
					nubus_get_rsrc_mem(&offset, &ent, 4);
				}
			dev->mem_end = dev->mem_start + offset;
		} else {
			switch (cardtype) {
				case MAC8390_KINETICS:
				case MAC8390_DAYNA: /* it's the same */
					dev->base_addr =
						(int)(ndev->board->slot_addr +
						DAYNA_8390_BASE);
					dev->mem_start =
						(int)(ndev->board->slot_addr +
						DAYNA_8390_MEM);
					dev->mem_end =
						dev->mem_start +
						mac8390_memsize(dev->mem_start);
					break;
				case MAC8390_INTERLAN:
					dev->base_addr =
						(int)(ndev->board->slot_addr +
						INTERLAN_8390_BASE);
					dev->mem_start =
						(int)(ndev->board->slot_addr +
						INTERLAN_8390_MEM);
					dev->mem_end =
						dev->mem_start +
						mac8390_memsize(dev->mem_start);
					break;
				case MAC8390_CABLETRON:
					dev->base_addr =
						(int)(ndev->board->slot_addr +
						CABLETRON_8390_BASE);
					dev->mem_start =
						(int)(ndev->board->slot_addr +
						CABLETRON_8390_MEM);
					/* The base address is unreadable if 0x00
					 * has been written to the command register
					 * Reset the chip by writing E8390_NODMA +
					 *   E8390_PAGE0 + E8390_STOP just to be
					 *   sure
					 */
					i = (void *)dev->base_addr;
					*i = 0x21;
					dev->mem_end =
						dev->mem_start +
						mac8390_memsize(dev->mem_start);
					break;

				default:
					printk(KERN_ERR "Card type %s is"
					       " unsupported, sorry\n",
					       ndev->board->name);
					continue;
			}
		}

		/* Do the nasty 8390 stuff */
		if (!mac8390_initdev(dev, ndev, cardtype))
			break;
	}

	if (!ndev)
		goto out;
	err = register_netdev(dev);
	if (err)
		goto out;
	return dev;

out:
	free_netdev(dev);
	return ERR_PTR(err);
}

#ifdef MODULE
MODULE_AUTHOR("David Huggins-Daines <dhd@debian.org> and others");
MODULE_DESCRIPTION("Macintosh NS8390-based Nubus Ethernet driver");
MODULE_LICENSE("GPL");

/* overkill, of course */
static struct net_device *dev_mac8390[15];
int init_module(void)
{
	int i;
	for (i = 0; i < 15; i++) {
		struct net_device *dev = mac8390_probe(-1);
		if (IS_ERR(dev))
			break;
		dev_mac890[i] = dev;
	}
	if (!i) {
		printk(KERN_NOTICE "mac8390.c: No useable cards found, driver NOT installed.\n");
		return -ENODEV;
	}
	return 0;
}

void cleanup_module(void)
{
	int i;
	for (i = 0; i < 15; i++) {
		struct net_device *dev = dev_mac890[i];
		if (dev) {
			unregister_netdev(dev);
			free_netdev(dev);
		}
	}
}

#endif /* MODULE */

static const struct net_device_ops mac8390_netdev_ops = {
	.ndo_open 		= mac8390_open,
	.ndo_stop		= mac8390_close,
	.ndo_start_xmit		= __ei_start_xmit,
	.ndo_tx_timeout		= __ei_tx_timeout,
	.ndo_get_stats		= __ei_get_stats,
	.ndo_set_multicast_list = __ei_set_multicast_list,
	.ndo_validate_addr	= eth_validate_addr,
	.ndo_set_mac_address 	= eth_mac_addr,
	.ndo_change_mtu		= eth_change_mtu,
#ifdef CONFIG_NET_POLL_CONTROLLER
	.ndo_poll_controller	= __ei_poll,
#endif
};

static int __init mac8390_initdev(struct net_device * dev, struct nubus_dev * ndev,
			    enum mac8390_type type)
{
	static u32 fwrd4_offsets[16]={
		0,      4,      8,      12,
		16,     20,     24,     28,
		32,     36,     40,     44,
		48,     52,     56,     60
	};
	static u32 back4_offsets[16]={
		60,     56,     52,     48,
		44,     40,     36,     32,
		28,     24,     20,     16,
		12,     8,      4,      0
	};
	static u32 fwrd2_offsets[16]={
		0,      2,      4,      6,
		8,     10,     12,     14,
		16,    18,     20,     22,
		24,    26,     28,     30
	};

	int access_bitmode = 0;

	/* Now fill in our stuff */
	dev->netdev_ops = &mac8390_netdev_ops;

	/* GAR, ei_status is actually a macro even though it looks global */
	ei_status.name = cardname[type];
	ei_status.word16 = word16[type];

	/* Cabletron's TX/RX buffers are backwards */
	if (type == MAC8390_CABLETRON) {
               ei_status.tx_start_page = CABLETRON_TX_START_PG;
               ei_status.rx_start_page = CABLETRON_RX_START_PG;
               ei_status.stop_page = CABLETRON_RX_STOP_PG;
               ei_status.rmem_start = dev->mem_start;
               ei_status.rmem_end = dev->mem_start + CABLETRON_RX_STOP_PG*256;
	} else {
               ei_status.tx_start_page = WD_START_PG;
               ei_status.rx_start_page = WD_START_PG + TX_PAGES;
               ei_status.stop_page = (dev->mem_end - dev->mem_start)/256;
               ei_status.rmem_start = dev->mem_start + TX_PAGES*256;
               ei_status.rmem_end = dev->mem_end;
	}

	/* Fill in model-specific information and functions */
	switch(type) {
	case MAC8390_FARALLON:
	case MAC8390_APPLE:
		switch(mac8390_testio(dev->mem_start)) {
			case ACCESS_UNKNOWN:
				printk("Don't know how to access card memory!\n");
				return -ENODEV;
				break;

			case ACCESS_16:
				/* 16 bit card, register map is reversed */
				ei_status.reset_8390 = &mac8390_no_reset;
				ei_status.block_input = &slow_sane_block_input;
				ei_status.block_output = &slow_sane_block_output;
				ei_status.get_8390_hdr = &slow_sane_get_8390_hdr;
				ei_status.reg_offset = back4_offsets;
				break;

			case ACCESS_32:
				/* 32 bit card, register map is reversed */
				ei_status.reset_8390 = &mac8390_no_reset;
				ei_status.block_input = &sane_block_input;
				ei_status.block_output = &sane_block_output;
				ei_status.get_8390_hdr = &sane_get_8390_hdr;
				ei_status.reg_offset = back4_offsets;
				access_bitmode = 1;
				break;
		}
		break;

	case MAC8390_ASANTE:
		/* Some Asante cards pass the 32 bit test
		 * but overwrite system memory when run at 32 bit.
		 * so we run them all at 16 bit.
		 */
		ei_status.reset_8390 = &mac8390_no_reset;
		ei_status.block_input = &slow_sane_block_input;
		ei_status.block_output = &slow_sane_block_output;
		ei_status.get_8390_hdr = &slow_sane_get_8390_hdr;
		ei_status.reg_offset = back4_offsets;
		break;

	case MAC8390_CABLETRON:
		/* 16 bit card, register map is short forward */
		ei_status.reset_8390 = &mac8390_no_reset;
		ei_status.block_input = &slow_sane_block_input;
		ei_status.block_output = &slow_sane_block_output;
		ei_status.get_8390_hdr = &slow_sane_get_8390_hdr;
		ei_status.reg_offset = fwrd2_offsets;
		break;

	case MAC8390_DAYNA:
	case MAC8390_KINETICS:
		/* 16 bit memory, register map is forward */
		/* dayna and similar */
		ei_status.reset_8390 = &mac8390_no_reset;
		ei_status.block_input = &dayna_block_input;
		ei_status.block_output = &dayna_block_output;
		ei_status.get_8390_hdr = &dayna_get_8390_hdr;
		ei_status.reg_offset = fwrd4_offsets;
		break;

	case MAC8390_INTERLAN:
		/* 16 bit memory, register map is forward */
		ei_status.reset_8390 = &interlan_reset;
		ei_status.block_input = &slow_sane_block_input;
		ei_status.block_output = &slow_sane_block_output;
		ei_status.get_8390_hdr = &slow_sane_get_8390_hdr;
	        ei_status.reg_offset = fwrd4_offsets;
	        break;

	default:
		printk(KERN_ERR "Card type %s is unsupported, sorry\n", ndev->board->name);
		return -ENODEV;
	}

	__NS8390_init(dev, 0);

	/* Good, done, now spit out some messages */
	printk(KERN_INFO "%s: %s in slot %X (type %s)\n",
	       dev->name, ndev->board->name, ndev->board->slot, cardname[type]);
	printk(KERN_INFO
	       "MAC %pM IRQ %d, %d KB shared memory at %#lx, %d-bit access.\n",
	       dev->dev_addr, dev->irq,
	       (unsigned int)(dev->mem_end - dev->mem_start) >> 10,
	       dev->mem_start, access_bitmode ? 32 : 16);
	return 0;
}

static int mac8390_open(struct net_device *dev)
{
	__ei_open(dev);
	if (request_irq(dev->irq, __ei_interrupt, 0, "8390 Ethernet", dev)) {
		printk ("%s: unable to get IRQ %d.\n", dev->name, dev->irq);
		return -EAGAIN;
	}
	return 0;
}

static int mac8390_close(struct net_device *dev)
{
	free_irq(dev->irq, dev);
	__ei_close(dev);
	return 0;
}

static void mac8390_no_reset(struct net_device *dev)
{
	ei_status.txing = 0;
	if (ei_debug > 1)
		printk("reset not supported\n");
	return;
}

static void interlan_reset(struct net_device *dev)
{
	unsigned char *target=nubus_slot_addr(IRQ2SLOT(dev->irq));
	if (ei_debug > 1)
		printk("Need to reset the NS8390 t=%lu...", jiffies);
	ei_status.txing = 0;
	target[0xC0000] = 0;
	if (ei_debug > 1)
		printk("reset complete\n");
	return;
}

/* dayna_memcpy_fromio/dayna_memcpy_toio */
/* directly from daynaport.c by Alan Cox */
static void dayna_memcpy_fromcard(struct net_device *dev, void *to, int from, int count)
{
	volatile unsigned char *ptr;
	unsigned char *target=to;
	from<<=1;	/* word, skip overhead */
	ptr=(unsigned char *)(dev->mem_start+from);
	/* Leading byte? */
	if (from&2) {
		*target++ = ptr[-1];
		ptr += 2;
		count--;
	}
	while(count>=2)
	{
		*(unsigned short *)target = *(unsigned short volatile *)ptr;
		ptr += 4;			/* skip cruft */
		target += 2;
		count-=2;
	}
	/* Trailing byte? */
	if(count)
		*target = *ptr;
}

static void dayna_memcpy_tocard(struct net_device *dev, int to, const void *from, int count)
{
	volatile unsigned short *ptr;
	const unsigned char *src=from;
	to<<=1;	/* word, skip overhead */
	ptr=(unsigned short *)(dev->mem_start+to);
	/* Leading byte? */
	if (to&2) { /* avoid a byte write (stomps on other data) */
		ptr[-1] = (ptr[-1]&0xFF00)|*src++;
		ptr++;
		count--;
	}
	while(count>=2)
	{
		*ptr++=*(unsigned short *)src;		/* Copy and */
		ptr++;			/* skip cruft */
		src += 2;
		count-=2;
	}
	/* Trailing byte? */
	if(count)
	{
		/* card doesn't like byte writes */
		*ptr=(*ptr&0x00FF)|(*src << 8);
	}
}

/* sane block input/output */
static void sane_get_8390_hdr(struct net_device *dev,
			      struct e8390_pkt_hdr *hdr, int ring_page)
{
	unsigned long hdr_start = (ring_page - WD_START_PG)<<8;
	memcpy_fromio((void *)hdr, (char *)dev->mem_start + hdr_start, 4);
	/* Fix endianness */
	hdr->count = swab16(hdr->count);
}

static void sane_block_input(struct net_device *dev, int count,
			     struct sk_buff *skb, int ring_offset)
{
	unsigned long xfer_base = ring_offset - (WD_START_PG<<8);
	unsigned long xfer_start = xfer_base + dev->mem_start;

	if (xfer_start + count > ei_status.rmem_end) {
		/* We must wrap the input move. */
		int semi_count = ei_status.rmem_end - xfer_start;
		memcpy_fromio(skb->data, (char *)dev->mem_start + xfer_base, semi_count);
		count -= semi_count;
		memcpy_toio(skb->data + semi_count, (char *)ei_status.rmem_start, count);
	} else {
		memcpy_fromio(skb->data, (char *)dev->mem_start + xfer_base, count);
	}
}

static void sane_block_output(struct net_device *dev, int count,
			      const unsigned char *buf, int start_page)
{
	long shmem = (start_page - WD_START_PG)<<8;

	memcpy_toio((char *)dev->mem_start + shmem, buf, count);
}

/* dayna block input/output */
static void dayna_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr, int ring_page)
{
	unsigned long hdr_start = (ring_page - WD_START_PG)<<8;

	dayna_memcpy_fromcard(dev, (void *)hdr, hdr_start, 4);
	/* Fix endianness */
	hdr->count=(hdr->count&0xFF)<<8|(hdr->count>>8);
}

static void dayna_block_input(struct net_device *dev, int count, struct sk_buff *skb, int ring_offset)
{
	unsigned long xfer_base = ring_offset - (WD_START_PG<<8);
	unsigned long xfer_start = xfer_base+dev->mem_start;

	/* Note the offset math is done in card memory space which is word
	   per long onto our space. */

	if (xfer_start + count > ei_status.rmem_end)
	{
		/* We must wrap the input move. */
		int semi_count = ei_status.rmem_end - xfer_start;
		dayna_memcpy_fromcard(dev, skb->data, xfer_base, semi_count);
		count -= semi_count;
		dayna_memcpy_fromcard(dev, skb->data + semi_count,
				      ei_status.rmem_start - dev->mem_start,
				      count);
	}
	else
	{
		dayna_memcpy_fromcard(dev, skb->data, xfer_base, count);
	}
}

static void dayna_block_output(struct net_device *dev, int count, const unsigned char *buf,
				int start_page)
{
	long shmem = (start_page - WD_START_PG)<<8;

	dayna_memcpy_tocard(dev, shmem, buf, count);
}

/* Cabletron block I/O */
static void slow_sane_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr,
	int ring_page)
{
	unsigned long hdr_start = (ring_page - WD_START_PG)<<8;
	word_memcpy_fromcard((void *)hdr, (char *)dev->mem_start+hdr_start, 4);
	/* Register endianism - fix here rather than 8390.c */
	hdr->count = (hdr->count&0xFF)<<8|(hdr->count>>8);
}

static void slow_sane_block_input(struct net_device *dev, int count, struct sk_buff *skb,
	int ring_offset)
{
	unsigned long xfer_base = ring_offset - (WD_START_PG<<8);
	unsigned long xfer_start = xfer_base+dev->mem_start;

	if (xfer_start + count > ei_status.rmem_end)
	{
		/* We must wrap the input move. */
		int semi_count = ei_status.rmem_end - xfer_start;
		word_memcpy_fromcard(skb->data, (char *)dev->mem_start +
			xfer_base, semi_count);
		count -= semi_count;
		word_memcpy_fromcard(skb->data + semi_count,
				     (char *)ei_status.rmem_start, count);
	}
	else
	{
		word_memcpy_fromcard(skb->data, (char *)dev->mem_start +
			xfer_base, count);
	}
}

static void slow_sane_block_output(struct net_device *dev, int count, const unsigned char *buf,
	int start_page)
{
	long shmem = (start_page - WD_START_PG)<<8;

	word_memcpy_tocard((char *)dev->mem_start + shmem, buf, count);
}

static void word_memcpy_tocard(void *tp, const void *fp, int count)
{
	volatile unsigned short *to = tp;
	const unsigned short *from = fp;

	count++;
	count/=2;

	while(count--)
		*to++=*from++;
}

static void word_memcpy_fromcard(void *tp, const void *fp, int count)
{
	unsigned short *to = tp;
	const volatile unsigned short *from = fp;

	count++;
	count/=2;

	while(count--)
		*to++=*from++;
}