summaryrefslogtreecommitdiff
path: root/drivers/net/ethernet/8390/smc-ultra.c
blob: ba44ede2919820c0c54c2810eaac52c041cc3085 (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
/* smc-ultra.c: A SMC Ultra ethernet driver for linux. */
/*
	This is a driver for the SMC Ultra and SMC EtherEZ ISA ethercards.

	Written 1993-1998 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

	This driver uses the cards in the 8390-compatible mode.
	Most of the run-time complexity is handled by the generic code in
	8390.c.  The code in this file is responsible for

		ultra_probe()	 	Detecting and initializing the card.
		ultra_probe1()
		ultra_probe_isapnp()

		ultra_open()		The card-specific details of starting, stopping
		ultra_reset_8390()	and resetting the 8390 NIC core.
		ultra_close()

		ultra_block_input()		Routines for reading and writing blocks of
		ultra_block_output()	packet buffer memory.
		ultra_pio_input()
		ultra_pio_output()

	This driver enables the shared memory only when doing the actual data
	transfers to avoid a bug in early version of the card that corrupted
	data transferred by a AHA1542.

	This driver now supports the programmed-I/O (PIO) data transfer mode of
	the EtherEZ. It does not use the non-8390-compatible "Altego" mode.
	That support (if available) is in smc-ez.c.

	Changelog:

	Paul Gortmaker	: multiple card support for module users.
	Donald Becker	: 4/17/96 PIO support, minor potential problems avoided.
	Donald Becker	: 6/6/96 correctly set auto-wrap bit.
	Alexander Sotirov : 1/20/01 Added support for ISAPnP cards

	Note about the ISA PnP support:

	This driver can not autoprobe for more than one SMC EtherEZ PnP card.
	You have to configure the second card manually through the /proc/isapnp
	interface and then load the module with an explicit io=0x___ option.
*/

static const char version[] =
	"smc-ultra.c:v2.02 2/3/98 Donald Becker (becker@cesdis.gsfc.nasa.gov)\n";

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/string.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/isapnp.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>

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

#include "8390.h"

#define DRV_NAME "smc-ultra"

/* A zero-terminated list of I/O addresses to be probed. */
static unsigned int ultra_portlist[] __initdata =
{0x200, 0x220, 0x240, 0x280, 0x300, 0x340, 0x380, 0};

static int ultra_probe1(struct net_device *dev, int ioaddr);

#ifdef __ISAPNP__
static int ultra_probe_isapnp(struct net_device *dev);
#endif

static int ultra_open(struct net_device *dev);
static void ultra_reset_8390(struct net_device *dev);
static void ultra_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr,
						int ring_page);
static void ultra_block_input(struct net_device *dev, int count,
						  struct sk_buff *skb, int ring_offset);
static void ultra_block_output(struct net_device *dev, int count,
							const unsigned char *buf, const int start_page);
static void ultra_pio_get_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr,
						int ring_page);
static void ultra_pio_input(struct net_device *dev, int count,
						  struct sk_buff *skb, int ring_offset);
static void ultra_pio_output(struct net_device *dev, int count,
							 const unsigned char *buf, const int start_page);
static int ultra_close_card(struct net_device *dev);

#ifdef __ISAPNP__
static struct isapnp_device_id ultra_device_ids[] __initdata = {
        {       ISAPNP_VENDOR('S','M','C'), ISAPNP_FUNCTION(0x8416),
                ISAPNP_VENDOR('S','M','C'), ISAPNP_FUNCTION(0x8416),
                (long) "SMC EtherEZ (8416)" },
        { }	/* terminate list */
};

MODULE_DEVICE_TABLE(isapnp, ultra_device_ids);
#endif


#define START_PG		0x00	/* First page of TX buffer */

#define ULTRA_CMDREG	0		/* Offset to ASIC command register. */
#define	 ULTRA_RESET	0x80	/* Board reset, in ULTRA_CMDREG. */
#define	 ULTRA_MEMENB	0x40	/* Enable the shared memory. */
#define IOPD	0x02			/* I/O Pipe Data (16 bits), PIO operation. */
#define IOPA	0x07			/* I/O Pipe Address for PIO operation. */
#define ULTRA_NIC_OFFSET  16	/* NIC register offset from the base_addr. */
#define ULTRA_IO_EXTENT 32
#define EN0_ERWCNT		0x08	/* Early receive warning count. */

#ifdef CONFIG_NET_POLL_CONTROLLER
static void ultra_poll(struct net_device *dev)
{
	disable_irq(dev->irq);
	ei_interrupt(dev->irq, dev);
	enable_irq(dev->irq);
}
#endif
/*	Probe for the Ultra.  This looks like a 8013 with the station
	address PROM at I/O ports <base>+8 to <base>+13, with a checksum
	following.
*/

static int __init do_ultra_probe(struct net_device *dev)
{
	int i;
	int base_addr = dev->base_addr;
	int irq = dev->irq;

	if (base_addr > 0x1ff)		/* Check a single specified location. */
		return ultra_probe1(dev, base_addr);
	else if (base_addr != 0)	/* Don't probe at all. */
		return -ENXIO;

#ifdef __ISAPNP__
	/* Look for any installed ISAPnP cards */
	if (isapnp_present() && (ultra_probe_isapnp(dev) == 0))
		return 0;
#endif

	for (i = 0; ultra_portlist[i]; i++) {
		dev->irq = irq;
		if (ultra_probe1(dev, ultra_portlist[i]) == 0)
			return 0;
	}

	return -ENODEV;
}

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

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

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

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

static const struct net_device_ops ultra_netdev_ops = {
	.ndo_open		= ultra_open,
	.ndo_stop		= ultra_close_card,

	.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 	= ultra_poll,
#endif
};

static int __init ultra_probe1(struct net_device *dev, int ioaddr)
{
	int i, retval;
	int checksum = 0;
	const char *model_name;
	unsigned char eeprom_irq = 0;
	static unsigned version_printed;
	/* Values from various config regs. */
	unsigned char num_pages, irqreg, addr, piomode;
	unsigned char idreg = inb(ioaddr + 7);
	unsigned char reg4 = inb(ioaddr + 4) & 0x7f;

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

	/* Check the ID nibble. */
	if ((idreg & 0xF0) != 0x20 			/* SMC Ultra */
		&& (idreg & 0xF0) != 0x40) {		/* SMC EtherEZ */
		retval = -ENODEV;
		goto out;
	}

	/* Select the station address register set. */
	outb(reg4, ioaddr + 4);

	for (i = 0; i < 8; i++)
		checksum += inb(ioaddr + 8 + i);
	if ((checksum & 0xff) != 0xFF) {
		retval = -ENODEV;
		goto out;
	}

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

	model_name = (idreg & 0xF0) == 0x20 ? "SMC Ultra" : "SMC EtherEZ";

	for (i = 0; i < 6; i++)
		dev->dev_addr[i] = inb(ioaddr + 8 + i);

	printk("%s: %s at %#3x, %pM", dev->name, model_name,
	       ioaddr, dev->dev_addr);

	/* Switch from the station address to the alternate register set and
	   read the useful registers there. */
	outb(0x80 | reg4, ioaddr + 4);

	/* Enabled FINE16 mode to avoid BIOS ROM width mismatches @ reboot. */
	outb(0x80 | inb(ioaddr + 0x0c), ioaddr + 0x0c);
	piomode = inb(ioaddr + 0x8);
	addr = inb(ioaddr + 0xb);
	irqreg = inb(ioaddr + 0xd);

	/* Switch back to the station address register set so that the MS-DOS driver
	   can find the card after a warm boot. */
	outb(reg4, ioaddr + 4);

	if (dev->irq < 2) {
		unsigned char irqmap[] = {0, 9, 3, 5, 7, 10, 11, 15};
		int irq;

		/* The IRQ bits are split. */
		irq = irqmap[((irqreg & 0x40) >> 4) + ((irqreg & 0x0c) >> 2)];

		if (irq == 0) {
			printk(", failed to detect IRQ line.\n");
			retval =  -EAGAIN;
			goto out;
		}
		dev->irq = irq;
		eeprom_irq = 1;
	}

	/* The 8390 isn't at the base address, so fake the offset */
	dev->base_addr = ioaddr+ULTRA_NIC_OFFSET;

	{
		static const int addr_tbl[4] = {
			0x0C0000, 0x0E0000, 0xFC0000, 0xFE0000
		};
		static const short num_pages_tbl[4] = {
			0x20, 0x40, 0x80, 0xff
		};

		dev->mem_start = ((addr & 0x0f) << 13) + addr_tbl[(addr >> 6) & 3] ;
		num_pages = num_pages_tbl[(addr >> 4) & 3];
	}

	ei_status.name = model_name;
	ei_status.word16 = 1;
	ei_status.tx_start_page = START_PG;
	ei_status.rx_start_page = START_PG + TX_PAGES;
	ei_status.stop_page = num_pages;

	ei_status.mem = ioremap(dev->mem_start, (ei_status.stop_page - START_PG)*256);
	if (!ei_status.mem) {
		printk(", failed to ioremap.\n");
		retval =  -ENOMEM;
		goto out;
	}

	dev->mem_end = dev->mem_start + (ei_status.stop_page - START_PG)*256;

	if (piomode) {
		printk(",%s IRQ %d programmed-I/O mode.\n",
			   eeprom_irq ? "EEPROM" : "assigned ", dev->irq);
		ei_status.block_input = &ultra_pio_input;
		ei_status.block_output = &ultra_pio_output;
		ei_status.get_8390_hdr = &ultra_pio_get_hdr;
	} else {
		printk(",%s IRQ %d memory %#lx-%#lx.\n", eeprom_irq ? "" : "assigned ",
			   dev->irq, dev->mem_start, dev->mem_end-1);
		ei_status.block_input = &ultra_block_input;
		ei_status.block_output = &ultra_block_output;
		ei_status.get_8390_hdr = &ultra_get_8390_hdr;
	}
	ei_status.reset_8390 = &ultra_reset_8390;

	dev->netdev_ops = &ultra_netdev_ops;
	NS8390_init(dev, 0);

	retval = register_netdev(dev);
	if (retval)
		goto out;
	return 0;
out:
	release_region(ioaddr, ULTRA_IO_EXTENT);
	return retval;
}

#ifdef __ISAPNP__
static int __init ultra_probe_isapnp(struct net_device *dev)
{
        int i;

        for (i = 0; ultra_device_ids[i].vendor != 0; i++) {
		struct pnp_dev *idev = NULL;

                while ((idev = pnp_find_dev(NULL,
                                            ultra_device_ids[i].vendor,
                                            ultra_device_ids[i].function,
                                            idev))) {
                        /* Avoid already found cards from previous calls */
                        if (pnp_device_attach(idev) < 0)
                        	continue;
                        if (pnp_activate_dev(idev) < 0) {
                              __again:
                        	pnp_device_detach(idev);
                        	continue;
                        }
			/* if no io and irq, search for next */
			if (!pnp_port_valid(idev, 0) || !pnp_irq_valid(idev, 0))
				goto __again;
                        /* found it */
			dev->base_addr = pnp_port_start(idev, 0);
			dev->irq = pnp_irq(idev, 0);
                        printk(KERN_INFO "smc-ultra.c: ISAPnP reports %s at i/o %#lx, irq %d.\n",
                                (char *) ultra_device_ids[i].driver_data,
                                dev->base_addr, dev->irq);
                        if (ultra_probe1(dev, dev->base_addr) != 0) {      /* Shouldn't happen. */
                                printk(KERN_ERR "smc-ultra.c: Probe of ISAPnP card at %#lx failed.\n", dev->base_addr);
                                pnp_device_detach(idev);
				return -ENXIO;
                        }
                        ei_status.priv = (unsigned long)idev;
                        break;
                }
                if (!idev)
                        continue;
                return 0;
        }

        return -ENODEV;
}
#endif

static int
ultra_open(struct net_device *dev)
{
	int retval;
	int ioaddr = dev->base_addr - ULTRA_NIC_OFFSET; /* ASIC addr */
	unsigned char irq2reg[] = {0, 0, 0x04, 0x08, 0, 0x0C, 0, 0x40,
				   0, 0x04, 0x44, 0x48, 0, 0, 0, 0x4C, };

	retval = request_irq(dev->irq, ei_interrupt, 0, dev->name, dev);
	if (retval)
		return retval;

	outb(0x00, ioaddr);	/* Disable shared memory for safety. */
	outb(0x80, ioaddr + 5);
	/* Set the IRQ line. */
	outb(inb(ioaddr + 4) | 0x80, ioaddr + 4);
	outb((inb(ioaddr + 13) & ~0x4C) | irq2reg[dev->irq], ioaddr + 13);
	outb(inb(ioaddr + 4) & 0x7f, ioaddr + 4);

	if (ei_status.block_input == &ultra_pio_input) {
		outb(0x11, ioaddr + 6);		/* Enable interrupts and PIO. */
		outb(0x01, ioaddr + 0x19);  	/* Enable ring read auto-wrap. */
	} else
		outb(0x01, ioaddr + 6);		/* Enable interrupts and memory. */
	/* Set the early receive warning level in window 0 high enough not
	   to receive ERW interrupts. */
	outb_p(E8390_NODMA+E8390_PAGE0, dev->base_addr);
	outb(0xff, dev->base_addr + EN0_ERWCNT);
	ei_open(dev);
	return 0;
}

static void
ultra_reset_8390(struct net_device *dev)
{
	int cmd_port = dev->base_addr - ULTRA_NIC_OFFSET; /* ASIC base addr */

	outb(ULTRA_RESET, cmd_port);
	if (ei_debug > 1) printk("resetting Ultra, t=%ld...", jiffies);
	ei_status.txing = 0;

	outb(0x00, cmd_port);	/* Disable shared memory for safety. */
	outb(0x80, cmd_port + 5);
	if (ei_status.block_input == &ultra_pio_input)
		outb(0x11, cmd_port + 6);		/* Enable interrupts and PIO. */
	else
		outb(0x01, cmd_port + 6);		/* Enable interrupts and memory. */

	if (ei_debug > 1) printk("reset done\n");
}

/* 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
ultra_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr, int ring_page)
{
	void __iomem *hdr_start = ei_status.mem + ((ring_page - START_PG)<<8);

	outb(ULTRA_MEMENB, dev->base_addr - ULTRA_NIC_OFFSET);	/* shmem on */
#ifdef __BIG_ENDIAN
	/* Officially this is what we are doing, but the readl() is faster */
	/* unfortunately it isn't endian aware of the struct               */
	memcpy_fromio(hdr, hdr_start, sizeof(struct e8390_pkt_hdr));
	hdr->count = le16_to_cpu(hdr->count);
#else
	((unsigned int*)hdr)[0] = readl(hdr_start);
#endif
	outb(0x00, dev->base_addr - ULTRA_NIC_OFFSET); /* shmem off */
}

/* Block input and output are easy on shared memory ethercards, the only
   complication is when the ring buffer wraps. */

static void
ultra_block_input(struct net_device *dev, int count, struct sk_buff *skb, int ring_offset)
{
	void __iomem *xfer_start = ei_status.mem + ring_offset - (START_PG<<8);

	/* Enable shared memory. */
	outb(ULTRA_MEMENB, dev->base_addr - ULTRA_NIC_OFFSET);

	if (ring_offset + count > ei_status.stop_page*256) {
		/* We must wrap the input move. */
		int semi_count = ei_status.stop_page*256 - ring_offset;
		memcpy_fromio(skb->data, xfer_start, semi_count);
		count -= semi_count;
		memcpy_fromio(skb->data + semi_count, ei_status.mem + TX_PAGES * 256, count);
	} else {
		memcpy_fromio(skb->data, xfer_start, count);
	}

	outb(0x00, dev->base_addr - ULTRA_NIC_OFFSET);	/* Disable memory. */
}

static void
ultra_block_output(struct net_device *dev, int count, const unsigned char *buf,
				int start_page)
{
	void __iomem *shmem = ei_status.mem + ((start_page - START_PG)<<8);

	/* Enable shared memory. */
	outb(ULTRA_MEMENB, dev->base_addr - ULTRA_NIC_OFFSET);

	memcpy_toio(shmem, buf, count);

	outb(0x00, dev->base_addr - ULTRA_NIC_OFFSET); /* Disable memory. */
}

/* The identical operations for programmed I/O cards.
   The PIO model is trivial to use: the 16 bit start address is written
   byte-sequentially to IOPA, with no intervening I/O operations, and the
   data is read or written to the IOPD data port.
   The only potential complication is that the address register is shared
   and must be always be rewritten between each read/write direction change.
   This is no problem for us, as the 8390 code ensures that we are single
   threaded. */
static void ultra_pio_get_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr,
						int ring_page)
{
	int ioaddr = dev->base_addr - ULTRA_NIC_OFFSET; /* ASIC addr */
	outb(0x00, ioaddr + IOPA);	/* Set the address, LSB first. */
	outb(ring_page, ioaddr + IOPA);
	insw(ioaddr + IOPD, hdr, sizeof(struct e8390_pkt_hdr)>>1);
}

static void ultra_pio_input(struct net_device *dev, int count,
						  struct sk_buff *skb, int ring_offset)
{
	int ioaddr = dev->base_addr - ULTRA_NIC_OFFSET; /* ASIC addr */
    char *buf = skb->data;

	/* For now set the address again, although it should already be correct. */
	outb(ring_offset, ioaddr + IOPA);	/* Set the address, LSB first. */
	outb(ring_offset >> 8, ioaddr + IOPA);
	/* We know skbuffs are padded to at least word alignment. */
	insw(ioaddr + IOPD, buf, (count+1)>>1);
}

static void ultra_pio_output(struct net_device *dev, int count,
							const unsigned char *buf, const int start_page)
{
	int ioaddr = dev->base_addr - ULTRA_NIC_OFFSET; /* ASIC addr */
	outb(0x00, ioaddr + IOPA);	/* Set the address, LSB first. */
	outb(start_page, ioaddr + IOPA);
	/* An extra odd byte is OK here as well. */
	outsw(ioaddr + IOPD, buf, (count+1)>>1);
}

static int
ultra_close_card(struct net_device *dev)
{
	int ioaddr = dev->base_addr - ULTRA_NIC_OFFSET; /* CMDREG */

	netif_stop_queue(dev);

	if (ei_debug > 1)
		printk("%s: Shutting down ethercard.\n", dev->name);

	outb(0x00, ioaddr + 6);		/* Disable interrupts. */
	free_irq(dev->irq, dev);

	NS8390_init(dev, 0);

	/* We should someday disable shared memory and change to 8-bit mode
	   "just in case"... */

	return 0;
}


#ifdef MODULE
#define MAX_ULTRA_CARDS	4	/* Max number of Ultra cards per module */
static struct net_device *dev_ultra[MAX_ULTRA_CARDS];
static int io[MAX_ULTRA_CARDS];
static int irq[MAX_ULTRA_CARDS];

module_param_array(io, int, NULL, 0);
module_param_array(irq, int, NULL, 0);
MODULE_PARM_DESC(io, "I/O base address(es)");
MODULE_PARM_DESC(irq, "IRQ number(s) (assigned)");
MODULE_DESCRIPTION("SMC Ultra/EtherEZ ISA/PnP Ethernet driver");
MODULE_LICENSE("GPL");

/* This is set up so that only a single autoprobe takes place per call.
ISA device autoprobes on a running machine are not recommended. */
int __init
init_module(void)
{
	struct net_device *dev;
	int this_dev, found = 0;

	for (this_dev = 0; this_dev < MAX_ULTRA_CARDS; this_dev++) {
		if (io[this_dev] == 0)  {
			if (this_dev != 0) break; /* only autoprobe 1st one */
			printk(KERN_NOTICE "smc-ultra.c: Presently autoprobing (not recommended) for a single card.\n");
		}
		dev = alloc_ei_netdev();
		if (!dev)
			break;
		dev->irq = irq[this_dev];
		dev->base_addr = io[this_dev];
		if (do_ultra_probe(dev) == 0) {
			dev_ultra[found++] = dev;
			continue;
		}
		free_netdev(dev);
		printk(KERN_WARNING "smc-ultra.c: No SMC Ultra card found (i/o = 0x%x).\n", io[this_dev]);
		break;
	}
	if (found)
		return 0;
	return -ENXIO;
}

static void cleanup_card(struct net_device *dev)
{
	/* NB: ultra_close_card() does free_irq */
#ifdef __ISAPNP__
	struct pnp_dev *idev = (struct pnp_dev *)ei_status.priv;
	if (idev)
		pnp_device_detach(idev);
#endif
	release_region(dev->base_addr - ULTRA_NIC_OFFSET, ULTRA_IO_EXTENT);
	iounmap(ei_status.mem);
}

void __exit
cleanup_module(void)
{
	int this_dev;

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