aboutsummaryrefslogtreecommitdiff
path: root/drivers/net/ne-h8300.c
blob: e0b0ef11f11038f64089c164967316affed23a92 (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
/* ne-h8300.c: A NE2000 clone on H8/300 driver for linux. */
/*
    original ne.c
    Written 1992-94 by Donald Becker.

    Copyright 1993 United States Government as represented by the
    Director, National Security Agency.

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

    The author may be reached as becker@scyld.com, or C/O
    Scyld Computing Corporation, 410 Severn Ave., Suite 210, Annapolis MD 21403

    H8/300 modified
    Yoshinori Sato <ysato@users.sourceforge.jp>
*/

static const char version1[] =
"ne-h8300.c:v1.00 2004/04/11 ysato\n";

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/delay.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/jiffies.h>

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

#define EI_SHIFT(x)	(ei_local->reg_offset[x])

#include "8390.h"

#define DRV_NAME "ne-h8300"

/* Some defines that people can play with if so inclined. */

/* Do we perform extra sanity checks on stuff ? */
/* #define NE_SANITY_CHECK */

/* Do we implement the read before write bugfix ? */
/* #define NE_RW_BUGFIX */

/* Do we have a non std. amount of memory? (in units of 256 byte pages) */
/* #define PACKETBUF_MEMSIZE	0x40 */

/* A zero-terminated list of I/O addresses to be probed at boot. */

/* ---- No user-serviceable parts below ---- */

static const char version[] =
    "8390.c:v1.10cvs 9/23/94 Donald Becker (becker@cesdis.gsfc.nasa.gov)\n";

#include "lib8390.c"

#define NE_BASE	 (dev->base_addr)
#define NE_CMD	 	0x00
#define NE_DATAPORT	(ei_status.word16?0x20:0x10)	/* NatSemi-defined port window offset. */
#define NE_RESET	(ei_status.word16?0x3f:0x1f)	/* Issue a read to reset, a write to clear. */
#define NE_IO_EXTENT	(ei_status.word16?0x40:0x20)

#define NESM_START_PG	0x40	/* First page of TX buffer */
#define NESM_STOP_PG	0x80	/* Last page +1 of RX ring */

static int ne_probe1(struct net_device *dev, int ioaddr);

static int ne_open(struct net_device *dev);
static int ne_close(struct net_device *dev);

static void ne_reset_8390(struct net_device *dev);
static void ne_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr,
			  int ring_page);
static void ne_block_input(struct net_device *dev, int count,
			  struct sk_buff *skb, int ring_offset);
static void ne_block_output(struct net_device *dev, const int count,
		const unsigned char *buf, const int start_page);


static u32 reg_offset[16];

static int __init init_reg_offset(struct net_device *dev,unsigned long base_addr)
{
	struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev);
	int i;
	unsigned char bus_width;

	bus_width = *(volatile unsigned char *)ABWCR;
	bus_width &= 1 << ((base_addr >> 21) & 7);

	for (i = 0; i < ARRAY_SIZE(reg_offset); i++)
		if (bus_width == 0)
			reg_offset[i] = i * 2 + 1;
		else
			reg_offset[i] = i;

	ei_local->reg_offset = reg_offset;
	return 0;
}

static int __initdata h8300_ne_count = 0;
#ifdef CONFIG_H8300H_H8MAX
static unsigned long __initdata h8300_ne_base[] = { 0x800600 };
static int h8300_ne_irq[] = {EXT_IRQ4};
#endif
#ifdef CONFIG_H8300H_AKI3068NET
static unsigned long __initdata h8300_ne_base[] = { 0x200000 };
static int h8300_ne_irq[] = {EXT_IRQ5};
#endif

static inline int init_dev(struct net_device *dev)
{
	if (h8300_ne_count < ARRAY_SIZE(h8300_ne_base)) {
		dev->base_addr = h8300_ne_base[h8300_ne_count];
		dev->irq       = h8300_ne_irq[h8300_ne_count];
		h8300_ne_count++;
		return 0;
	} else
		return -ENODEV;
}

/*  Probe for various non-shared-memory ethercards.

   NEx000-clone boards have a Station Address PROM (SAPROM) in the packet
   buffer memory space.  NE2000 clones have 0x57,0x57 in bytes 0x0e,0x0f of
   the SAPROM, while other supposed NE2000 clones must be detected by their
   SA prefix.

   Reading the SAPROM from a word-wide card with the 8390 set in byte-wide
   mode results in doubled values, which can be detected and compensated for.

   The probe is also responsible for initializing the card and filling
   in the 'dev' and 'ei_status' structures.

   We use the minimum memory size for some ethercard product lines, iff we can't
   distinguish models.  You can increase the packet buffer size by setting
   PACKETBUF_MEMSIZE.  Reported Cabletron packet buffer locations are:
	E1010   starts at 0x100 and ends at 0x2000.
	E1010-x starts at 0x100 and ends at 0x8000. ("-x" means "more memory")
	E2010	 starts at 0x100 and ends at 0x4000.
	E2010-x starts at 0x100 and ends at 0xffff.  */

static int __init do_ne_probe(struct net_device *dev)
{
	unsigned int base_addr = dev->base_addr;

	/* First check any supplied i/o locations. User knows best. <cough> */
	if (base_addr > 0x1ff)	/* Check a single specified location. */
		return ne_probe1(dev, base_addr);
	else if (base_addr != 0)	/* Don't probe at all. */
		return -ENXIO;

	return -ENODEV;
}

static void cleanup_card(struct net_device *dev)
{
	free_irq(dev->irq, dev);
	release_region(dev->base_addr, NE_IO_EXTENT);
}

#ifndef MODULE
struct net_device * __init ne_probe(int unit)
{
	struct net_device *dev = alloc_ei_netdev();
	int err;

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

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

	sprintf(dev->name, "eth%d", unit);
	netdev_boot_setup_check(dev);

	err = init_reg_offset(dev, dev->base_addr);
	if (err)
		goto out;

	err = do_ne_probe(dev);
	if (err)
		goto out;
	return dev;
out:
	free_netdev(dev);
	return ERR_PTR(err);
}
#endif

static const struct net_device_ops ne_netdev_ops = {
	.ndo_open		= ne_open,
	.ndo_stop		= ne_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 ne_probe1(struct net_device *dev, int ioaddr)
{
	int i;
	unsigned char SA_prom[16];
	int wordlength = 2;
	const char *name = NULL;
	int start_page, stop_page;
	int reg0, ret;
	static unsigned version_printed;
	struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev);
	unsigned char bus_width;

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

	reg0 = inb_p(ioaddr);
	if (reg0 == 0xFF) {
		ret = -ENODEV;
		goto err_out;
	}

	/* Do a preliminary verification that we have a 8390. */
	{
		int regd;
		outb_p(E8390_NODMA+E8390_PAGE1+E8390_STOP, ioaddr + E8390_CMD);
		regd = inb_p(ioaddr + EI_SHIFT(0x0d));
		outb_p(0xff, ioaddr + EI_SHIFT(0x0d));
		outb_p(E8390_NODMA+E8390_PAGE0, ioaddr + E8390_CMD);
		inb_p(ioaddr + EN0_COUNTER0); /* Clear the counter by reading. */
		if (inb_p(ioaddr + EN0_COUNTER0) != 0) {
			outb_p(reg0, ioaddr + EI_SHIFT(0));
			outb_p(regd, ioaddr + EI_SHIFT(0x0d));	/* Restore the old values. */
			ret = -ENODEV;
			goto err_out;
		}
	}

	if (ei_debug  &&  version_printed++ == 0)
		printk(KERN_INFO "%s", version1);

	printk(KERN_INFO "NE*000 ethercard probe at %08x:", ioaddr);

	/* Read the 16 bytes of station address PROM.
	   We must first initialize registers, similar to NS8390_init(eifdev, 0).
	   We can't reliably read the SAPROM address without this.
	   (I learned the hard way!). */
	{
		struct {unsigned char value, offset; } program_seq[] =
		{
			{E8390_NODMA+E8390_PAGE0+E8390_STOP, E8390_CMD}, /* Select page 0*/
			{0x48,	EN0_DCFG},	/* Set byte-wide (0x48) access. */
			{0x00,	EN0_RCNTLO},	/* Clear the count regs. */
			{0x00,	EN0_RCNTHI},
			{0x00,	EN0_IMR},	/* Mask completion irq. */
			{0xFF,	EN0_ISR},
			{E8390_RXOFF, EN0_RXCR},	/* 0x20  Set to monitor */
			{E8390_TXOFF, EN0_TXCR},	/* 0x02  and loopback mode. */
			{32,	EN0_RCNTLO},
			{0x00,	EN0_RCNTHI},
			{0x00,	EN0_RSARLO},	/* DMA starting at 0x0000. */
			{0x00,	EN0_RSARHI},
			{E8390_RREAD+E8390_START, E8390_CMD},
		};

		for (i = 0; i < ARRAY_SIZE(program_seq); i++)
			outb_p(program_seq[i].value, ioaddr + program_seq[i].offset);

	}
	bus_width = *(volatile unsigned char *)ABWCR;
	bus_width &= 1 << ((ioaddr >> 21) & 7);
	ei_status.word16 = (bus_width == 0); /* temporary setting */
	for(i = 0; i < 16 /*sizeof(SA_prom)*/; i++) {
		SA_prom[i] = inb_p(ioaddr + NE_DATAPORT);
		inb_p(ioaddr + NE_DATAPORT); /* dummy read */
	}

	start_page = NESM_START_PG;
	stop_page = NESM_STOP_PG;

	if (bus_width)
		wordlength = 1;
	else
		outb_p(0x49, ioaddr + EN0_DCFG);

	/* Set up the rest of the parameters. */
	name = (wordlength == 2) ? "NE2000" : "NE1000";

	if (! dev->irq) {
		printk(" failed to detect IRQ line.\n");
		ret = -EAGAIN;
		goto err_out;
	}

	/* Snarf the interrupt now.  There's no point in waiting since we cannot
	   share and the board will usually be enabled. */
	ret = request_irq(dev->irq, __ei_interrupt, 0, name, dev);
	if (ret) {
		printk (" unable to get IRQ %d (errno=%d).\n", dev->irq, ret);
		goto err_out;
	}

	dev->base_addr = ioaddr;

	for(i = 0; i < ETHER_ADDR_LEN; i++)
		dev->dev_addr[i] = SA_prom[i];
	printk(" %pM\n", dev->dev_addr);

	printk("%s: %s found at %#x, using IRQ %d.\n",
		dev->name, name, ioaddr, dev->irq);

	ei_status.name = name;
	ei_status.tx_start_page = start_page;
	ei_status.stop_page = stop_page;
	ei_status.word16 = (wordlength == 2);

	ei_status.rx_start_page = start_page + TX_PAGES;
#ifdef PACKETBUF_MEMSIZE
	 /* Allow the packet buffer size to be overridden by know-it-alls. */
	ei_status.stop_page = ei_status.tx_start_page + PACKETBUF_MEMSIZE;
#endif

	ei_status.reset_8390 = &ne_reset_8390;
	ei_status.block_input = &ne_block_input;
	ei_status.block_output = &ne_block_output;
	ei_status.get_8390_hdr = &ne_get_8390_hdr;
	ei_status.priv = 0;

	dev->netdev_ops = &ne_netdev_ops;

	__NS8390_init(dev, 0);

	ret = register_netdev(dev);
	if (ret)
		goto out_irq;
	return 0;
out_irq:
	free_irq(dev->irq, dev);
err_out:
	release_region(ioaddr, NE_IO_EXTENT);
	return ret;
}

static int ne_open(struct net_device *dev)
{
	__ei_open(dev);
	return 0;
}

static int ne_close(struct net_device *dev)
{
	if (ei_debug > 1)
		printk(KERN_DEBUG "%s: Shutting down ethercard.\n", dev->name);
	__ei_close(dev);
	return 0;
}

/* Hard reset the card.  This used to pause for the same period that a
   8390 reset command required, but that shouldn't be necessary. */

static void ne_reset_8390(struct net_device *dev)
{
	unsigned long reset_start_time = jiffies;
	struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev);

	if (ei_debug > 1)
		printk(KERN_DEBUG "resetting the 8390 t=%ld...", jiffies);

	/* DON'T change these to inb_p/outb_p or reset will fail on clones. */
	outb(inb(NE_BASE + NE_RESET), NE_BASE + NE_RESET);

	ei_status.txing = 0;
	ei_status.dmaing = 0;

	/* This check _should_not_ be necessary, omit eventually. */
	while ((inb_p(NE_BASE+EN0_ISR) & ENISR_RESET) == 0)
		if (time_after(jiffies, reset_start_time + 2*HZ/100)) {
			printk(KERN_WARNING "%s: ne_reset_8390() did not complete.\n", dev->name);
			break;
		}
	outb_p(ENISR_RESET, NE_BASE + EN0_ISR);	/* Ack intr. */
}

/* Grab the 8390 specific header. Similar to the block_input routine, but
   we don't need to be concerned with ring wrap as the header will be at
   the start of a page, so we optimize accordingly. */

static void ne_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr, int ring_page)
{
	struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev);
	/* This *shouldn't* happen. If it does, it's the last thing you'll see */

	if (ei_status.dmaing)
	{
		printk(KERN_EMERG "%s: DMAing conflict in ne_get_8390_hdr "
			"[DMAstat:%d][irqlock:%d].\n",
			dev->name, ei_status.dmaing, ei_status.irqlock);
		return;
	}

	ei_status.dmaing |= 0x01;
	outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, NE_BASE + NE_CMD);
	outb_p(sizeof(struct e8390_pkt_hdr), NE_BASE + EN0_RCNTLO);
	outb_p(0, NE_BASE + EN0_RCNTHI);
	outb_p(0, NE_BASE + EN0_RSARLO);		/* On page boundary */
	outb_p(ring_page, NE_BASE + EN0_RSARHI);
	outb_p(E8390_RREAD+E8390_START, NE_BASE + NE_CMD);

	if (ei_status.word16) {
		int len;
		unsigned short *p = (unsigned short *)hdr;
		for (len = sizeof(struct e8390_pkt_hdr)>>1; len > 0; len--)
			*p++ = inw(NE_BASE + NE_DATAPORT);
	} else
		insb(NE_BASE + NE_DATAPORT, hdr, sizeof(struct e8390_pkt_hdr));

	outb_p(ENISR_RDC, NE_BASE + EN0_ISR);	/* Ack intr. */
	ei_status.dmaing &= ~0x01;

	le16_to_cpus(&hdr->count);
}

/* Block input and output, similar to the Crynwr packet driver.  If you
   are porting to a new ethercard, look at the packet driver source for hints.
   The NEx000 doesn't share the on-board packet memory -- you have to put
   the packet out through the "remote DMA" dataport using outb. */

static void ne_block_input(struct net_device *dev, int count, struct sk_buff *skb, int ring_offset)
{
	struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev);
#ifdef NE_SANITY_CHECK
	int xfer_count = count;
#endif
	char *buf = skb->data;

	/* This *shouldn't* happen. If it does, it's the last thing you'll see */
	if (ei_status.dmaing)
	{
		printk(KERN_EMERG "%s: DMAing conflict in ne_block_input "
			"[DMAstat:%d][irqlock:%d].\n",
			dev->name, ei_status.dmaing, ei_status.irqlock);
		return;
	}
	ei_status.dmaing |= 0x01;
	outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, NE_BASE + NE_CMD);
	outb_p(count & 0xff, NE_BASE + EN0_RCNTLO);
	outb_p(count >> 8, NE_BASE + EN0_RCNTHI);
	outb_p(ring_offset & 0xff, NE_BASE + EN0_RSARLO);
	outb_p(ring_offset >> 8, NE_BASE + EN0_RSARHI);
	outb_p(E8390_RREAD+E8390_START, NE_BASE + NE_CMD);
	if (ei_status.word16)
	{
		int len;
		unsigned short *p = (unsigned short *)buf;
		for (len = count>>1; len > 0; len--)
			*p++ = inw(NE_BASE + NE_DATAPORT);
		if (count & 0x01)
		{
			buf[count-1] = inb(NE_BASE + NE_DATAPORT);
#ifdef NE_SANITY_CHECK
			xfer_count++;
#endif
		}
	} else {
		insb(NE_BASE + NE_DATAPORT, buf, count);
	}

#ifdef NE_SANITY_CHECK
	/* This was for the ALPHA version only, but enough people have
	   been encountering problems so it is still here.  If you see
	   this message you either 1) have a slightly incompatible clone
	   or 2) have noise/speed problems with your bus. */

	if (ei_debug > 1)
	{
		/* DMA termination address check... */
		int addr, tries = 20;
		do {
			/* DON'T check for 'inb_p(EN0_ISR) & ENISR_RDC' here
			   -- it's broken for Rx on some cards! */
			int high = inb_p(NE_BASE + EN0_RSARHI);
			int low = inb_p(NE_BASE + EN0_RSARLO);
			addr = (high << 8) + low;
			if (((ring_offset + xfer_count) & 0xff) == low)
				break;
		} while (--tries > 0);
	 	if (tries <= 0)
			printk(KERN_WARNING "%s: RX transfer address mismatch,"
				"%#4.4x (expected) vs. %#4.4x (actual).\n",
				dev->name, ring_offset + xfer_count, addr);
	}
#endif
	outb_p(ENISR_RDC, NE_BASE + EN0_ISR);	/* Ack intr. */
	ei_status.dmaing &= ~0x01;
}

static void ne_block_output(struct net_device *dev, int count,
		const unsigned char *buf, const int start_page)
{
	struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev);
	unsigned long dma_start;
#ifdef NE_SANITY_CHECK
	int retries = 0;
#endif

	/* Round the count up for word writes.  Do we need to do this?
	   What effect will an odd byte count have on the 8390?
	   I should check someday. */

	if (ei_status.word16 && (count & 0x01))
		count++;

	/* This *shouldn't* happen. If it does, it's the last thing you'll see */
	if (ei_status.dmaing)
	{
		printk(KERN_EMERG "%s: DMAing conflict in ne_block_output."
			"[DMAstat:%d][irqlock:%d]\n",
			dev->name, ei_status.dmaing, ei_status.irqlock);
		return;
	}
	ei_status.dmaing |= 0x01;
	/* We should already be in page 0, but to be safe... */
	outb_p(E8390_PAGE0+E8390_START+E8390_NODMA, NE_BASE + NE_CMD);

#ifdef NE_SANITY_CHECK
retry:
#endif

#ifdef NE8390_RW_BUGFIX
	/* Handle the read-before-write bug the same way as the
	   Crynwr packet driver -- the NatSemi method doesn't work.
	   Actually this doesn't always work either, but if you have
	   problems with your NEx000 this is better than nothing! */

	outb_p(0x42, NE_BASE + EN0_RCNTLO);
	outb_p(0x00, NE_BASE + EN0_RCNTHI);
	outb_p(0x42, NE_BASE + EN0_RSARLO);
	outb_p(0x00, NE_BASE + EN0_RSARHI);
	outb_p(E8390_RREAD+E8390_START, NE_BASE + NE_CMD);
	/* Make certain that the dummy read has occurred. */
	udelay(6);
#endif

	outb_p(ENISR_RDC, NE_BASE + EN0_ISR);

	/* Now the normal output. */
	outb_p(count & 0xff, NE_BASE + EN0_RCNTLO);
	outb_p(count >> 8,   NE_BASE + EN0_RCNTHI);
	outb_p(0x00, NE_BASE + EN0_RSARLO);
	outb_p(start_page, NE_BASE + EN0_RSARHI);

	outb_p(E8390_RWRITE+E8390_START, NE_BASE + NE_CMD);
	if (ei_status.word16) {
		int len;
		unsigned short *p = (unsigned short *)buf;
		for (len = count>>1; len > 0; len--)
			outw(*p++, NE_BASE + NE_DATAPORT);
	} else {
		outsb(NE_BASE + NE_DATAPORT, buf, count);
	}

	dma_start = jiffies;

#ifdef NE_SANITY_CHECK
	/* This was for the ALPHA version only, but enough people have
	   been encountering problems so it is still here. */

	if (ei_debug > 1)
	{
		/* DMA termination address check... */
		int addr, tries = 20;
		do {
			int high = inb_p(NE_BASE + EN0_RSARHI);
			int low = inb_p(NE_BASE + EN0_RSARLO);
			addr = (high << 8) + low;
			if ((start_page << 8) + count == addr)
				break;
		} while (--tries > 0);

		if (tries <= 0)
		{
			printk(KERN_WARNING "%s: Tx packet transfer address mismatch,"
				"%#4.4x (expected) vs. %#4.4x (actual).\n",
				dev->name, (start_page << 8) + count, addr);
			if (retries++ == 0)
				goto retry;
		}
	}
#endif

	while ((inb_p(NE_BASE + EN0_ISR) & ENISR_RDC) == 0)
		if (time_after(jiffies, dma_start + 2*HZ/100)) {		/* 20ms */
			printk(KERN_WARNING "%s: timeout waiting for Tx RDC.\n", dev->name);
			ne_reset_8390(dev);
			__NS8390_init(dev,1);
			break;
		}

	outb_p(ENISR_RDC, NE_BASE + EN0_ISR);	/* Ack intr. */
	ei_status.dmaing &= ~0x01;
}


#ifdef MODULE
#define MAX_NE_CARDS	1	/* Max number of NE cards per module */
static struct net_device *dev_ne[MAX_NE_CARDS];
static int io[MAX_NE_CARDS];
static int irq[MAX_NE_CARDS];
static int bad[MAX_NE_CARDS];	/* 0xbad = bad sig or no reset ack */

module_param_array(io, int, NULL, 0);
module_param_array(irq, int, NULL, 0);
module_param_array(bad, int, NULL, 0);
MODULE_PARM_DESC(io, "I/O base address(es)");
MODULE_PARM_DESC(irq, "IRQ number(s)");
MODULE_DESCRIPTION("H8/300 NE2000 Ethernet driver");
MODULE_LICENSE("GPL");

/* This is set up so that no ISA autoprobe takes place. We can't guarantee
that the ne2k probe is the last 8390 based probe to take place (as it
is at boot) and so the probe will get confused by any other 8390 cards.
ISA device autoprobes on a running machine are not recommended anyway. */

int init_module(void)
{
	int this_dev, found = 0;
	int err;

	for (this_dev = 0; this_dev < MAX_NE_CARDS; this_dev++) {
		struct net_device *dev = alloc_ei_netdev();
		if (!dev)
			break;
		if (io[this_dev]) {
			dev->irq = irq[this_dev];
			dev->mem_end = bad[this_dev];
			dev->base_addr = io[this_dev];
		} else {
			dev->base_addr = h8300_ne_base[this_dev];
			dev->irq = h8300_ne_irq[this_dev];
		}
		err = init_reg_offset(dev, dev->base_addr);
		if (!err) {
			if (do_ne_probe(dev) == 0) {
				dev_ne[found++] = dev;
				continue;
			}
		}
		free_netdev(dev);
		if (found)
			break;
		if (io[this_dev] != 0)
			printk(KERN_WARNING "ne.c: No NE*000 card found at i/o = %#x\n", dev->base_addr);
		else
			printk(KERN_NOTICE "ne.c: You must supply \"io=0xNNN\" value(s) for ISA cards.\n");
		return -ENXIO;
	}
	if (found)
		return 0;
	return -ENODEV;
}

void cleanup_module(void)
{
	int this_dev;

	for (this_dev = 0; this_dev < MAX_NE_CARDS; this_dev++) {
		struct net_device *dev = dev_ne[this_dev];
		if (dev) {
			unregister_netdev(dev);
			cleanup_card(dev);
			free_netdev(dev);
		}
	}
}
#endif /* MODULE */