1 /* smc-ultra.c: A SMC Ultra ethernet driver for linux. */
2 /*
3 	This is a driver for the SMC Ultra and SMC EtherEZ ISA ethercards.
4 
5 	Written 1993-1998 by Donald Becker.
6 
7 	Copyright 1993 United States Government as represented by the
8 	Director, National Security Agency.
9 
10 	This software may be used and distributed according to the terms
11 	of the GNU General Public License, incorporated herein by reference.
12 
13 	The author may be reached as becker@scyld.com, or C/O
14 	Scyld Computing Corporation
15 	410 Severn Ave., Suite 210
16 	Annapolis MD 21403
17 
18 	This driver uses the cards in the 8390-compatible mode.
19 	Most of the run-time complexity is handled by the generic code in
20 	8390.c.  The code in this file is responsible for
21 
22 		ultra_probe()	 	Detecting and initializing the card.
23 		ultra_probe1()
24 		ultra_probe_isapnp()
25 
26 		ultra_open()		The card-specific details of starting, stopping
27 		ultra_reset_8390()	and resetting the 8390 NIC core.
28 		ultra_close()
29 
30 		ultra_block_input()		Routines for reading and writing blocks of
31 		ultra_block_output()	packet buffer memory.
32 		ultra_pio_input()
33 		ultra_pio_output()
34 
35 	This driver enables the shared memory only when doing the actual data
36 	transfers to avoid a bug in early version of the card that corrupted
37 	data transferred by a AHA1542.
38 
39 	This driver now supports the programmed-I/O (PIO) data transfer mode of
40 	the EtherEZ. It does not use the non-8390-compatible "Altego" mode.
41 	That support (if available) is in smc-ez.c.
42 
43 	Changelog:
44 
45 	Paul Gortmaker	: multiple card support for module users.
46 	Donald Becker	: 4/17/96 PIO support, minor potential problems avoided.
47 	Donald Becker	: 6/6/96 correctly set auto-wrap bit.
48 	Alexander Sotirov : 1/20/01 Added support for ISAPnP cards
49 
50 	Note about the ISA PnP support:
51 
52 	This driver can not autoprobe for more than one SMC EtherEZ PnP card.
53 	You have to configure the second card manually through the /proc/isapnp
54 	interface and then load the module with an explicit io=0x___ option.
55 */
56 
57 static const char version[] =
58 	"smc-ultra.c:v2.02 2/3/98 Donald Becker (becker@cesdis.gsfc.nasa.gov)\n";
59 
60 #include <linux/module.h>
61 #include <linux/kernel.h>
62 #include <linux/errno.h>
63 #include <linux/string.h>
64 #include <linux/init.h>
65 #include <linux/interrupt.h>
66 #include <linux/isapnp.h>
67 #include <linux/netdevice.h>
68 #include <linux/etherdevice.h>
69 
70 #include <asm/io.h>
71 #include <asm/irq.h>
72 
73 #include "8390.h"
74 
75 #define DRV_NAME "smc-ultra"
76 
77 /* A zero-terminated list of I/O addresses to be probed. */
78 static unsigned int ultra_portlist[] __initdata =
79 {0x200, 0x220, 0x240, 0x280, 0x300, 0x340, 0x380, 0};
80 
81 static int ultra_probe1(struct net_device *dev, int ioaddr);
82 
83 #ifdef __ISAPNP__
84 static int ultra_probe_isapnp(struct net_device *dev);
85 #endif
86 
87 static int ultra_open(struct net_device *dev);
88 static void ultra_reset_8390(struct net_device *dev);
89 static void ultra_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr,
90 						int ring_page);
91 static void ultra_block_input(struct net_device *dev, int count,
92 						  struct sk_buff *skb, int ring_offset);
93 static void ultra_block_output(struct net_device *dev, int count,
94 							const unsigned char *buf, const int start_page);
95 static void ultra_pio_get_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr,
96 						int ring_page);
97 static void ultra_pio_input(struct net_device *dev, int count,
98 						  struct sk_buff *skb, int ring_offset);
99 static void ultra_pio_output(struct net_device *dev, int count,
100 							 const unsigned char *buf, const int start_page);
101 static int ultra_close_card(struct net_device *dev);
102 
103 #ifdef __ISAPNP__
104 static struct isapnp_device_id ultra_device_ids[] __initdata = {
105         {       ISAPNP_VENDOR('S','M','C'), ISAPNP_FUNCTION(0x8416),
106                 ISAPNP_VENDOR('S','M','C'), ISAPNP_FUNCTION(0x8416),
107                 (long) "SMC EtherEZ (8416)" },
108         { }	/* terminate list */
109 };
110 
111 MODULE_DEVICE_TABLE(isapnp, ultra_device_ids);
112 #endif
113 
114 
115 #define START_PG		0x00	/* First page of TX buffer */
116 
117 #define ULTRA_CMDREG	0		/* Offset to ASIC command register. */
118 #define	 ULTRA_RESET	0x80	/* Board reset, in ULTRA_CMDREG. */
119 #define	 ULTRA_MEMENB	0x40	/* Enable the shared memory. */
120 #define IOPD	0x02			/* I/O Pipe Data (16 bits), PIO operation. */
121 #define IOPA	0x07			/* I/O Pipe Address for PIO operation. */
122 #define ULTRA_NIC_OFFSET  16	/* NIC register offset from the base_addr. */
123 #define ULTRA_IO_EXTENT 32
124 #define EN0_ERWCNT		0x08	/* Early receive warning count. */
125 
126 #ifdef CONFIG_NET_POLL_CONTROLLER
127 static void ultra_poll(struct net_device *dev)
128 {
129 	disable_irq(dev->irq);
130 	ei_interrupt(dev->irq, dev);
131 	enable_irq(dev->irq);
132 }
133 #endif
134 /*	Probe for the Ultra.  This looks like a 8013 with the station
135 	address PROM at I/O ports <base>+8 to <base>+13, with a checksum
136 	following.
137 */
138 
139 static int __init do_ultra_probe(struct net_device *dev)
140 {
141 	int i;
142 	int base_addr = dev->base_addr;
143 	int irq = dev->irq;
144 
145 	if (base_addr > 0x1ff)		/* Check a single specified location. */
146 		return ultra_probe1(dev, base_addr);
147 	else if (base_addr != 0)	/* Don't probe at all. */
148 		return -ENXIO;
149 
150 #ifdef __ISAPNP__
151 	/* Look for any installed ISAPnP cards */
152 	if (isapnp_present() && (ultra_probe_isapnp(dev) == 0))
153 		return 0;
154 #endif
155 
156 	for (i = 0; ultra_portlist[i]; i++) {
157 		dev->irq = irq;
158 		if (ultra_probe1(dev, ultra_portlist[i]) == 0)
159 			return 0;
160 	}
161 
162 	return -ENODEV;
163 }
164 
165 #ifndef MODULE
166 struct net_device * __init ultra_probe(int unit)
167 {
168 	struct net_device *dev = alloc_ei_netdev();
169 	int err;
170 
171 	if (!dev)
172 		return ERR_PTR(-ENOMEM);
173 
174 	sprintf(dev->name, "eth%d", unit);
175 	netdev_boot_setup_check(dev);
176 
177 	err = do_ultra_probe(dev);
178 	if (err)
179 		goto out;
180 	return dev;
181 out:
182 	free_netdev(dev);
183 	return ERR_PTR(err);
184 }
185 #endif
186 
187 static const struct net_device_ops ultra_netdev_ops = {
188 	.ndo_open		= ultra_open,
189 	.ndo_stop		= ultra_close_card,
190 
191 	.ndo_start_xmit		= ei_start_xmit,
192 	.ndo_tx_timeout		= ei_tx_timeout,
193 	.ndo_get_stats		= ei_get_stats,
194 	.ndo_set_rx_mode	= ei_set_multicast_list,
195 	.ndo_validate_addr	= eth_validate_addr,
196 	.ndo_set_mac_address 	= eth_mac_addr,
197 	.ndo_change_mtu		= eth_change_mtu,
198 #ifdef CONFIG_NET_POLL_CONTROLLER
199 	.ndo_poll_controller 	= ultra_poll,
200 #endif
201 };
202 
203 static int __init ultra_probe1(struct net_device *dev, int ioaddr)
204 {
205 	int i, retval;
206 	int checksum = 0;
207 	const char *model_name;
208 	unsigned char eeprom_irq = 0;
209 	static unsigned version_printed;
210 	/* Values from various config regs. */
211 	unsigned char num_pages, irqreg, addr, piomode;
212 	unsigned char idreg = inb(ioaddr + 7);
213 	unsigned char reg4 = inb(ioaddr + 4) & 0x7f;
214 
215 	if (!request_region(ioaddr, ULTRA_IO_EXTENT, DRV_NAME))
216 		return -EBUSY;
217 
218 	/* Check the ID nibble. */
219 	if ((idreg & 0xF0) != 0x20 			/* SMC Ultra */
220 		&& (idreg & 0xF0) != 0x40) {		/* SMC EtherEZ */
221 		retval = -ENODEV;
222 		goto out;
223 	}
224 
225 	/* Select the station address register set. */
226 	outb(reg4, ioaddr + 4);
227 
228 	for (i = 0; i < 8; i++)
229 		checksum += inb(ioaddr + 8 + i);
230 	if ((checksum & 0xff) != 0xFF) {
231 		retval = -ENODEV;
232 		goto out;
233 	}
234 
235 	if (ei_debug  &&  version_printed++ == 0)
236 		printk(version);
237 
238 	model_name = (idreg & 0xF0) == 0x20 ? "SMC Ultra" : "SMC EtherEZ";
239 
240 	for (i = 0; i < 6; i++)
241 		dev->dev_addr[i] = inb(ioaddr + 8 + i);
242 
243 	printk("%s: %s at %#3x, %pM", dev->name, model_name,
244 	       ioaddr, dev->dev_addr);
245 
246 	/* Switch from the station address to the alternate register set and
247 	   read the useful registers there. */
248 	outb(0x80 | reg4, ioaddr + 4);
249 
250 	/* Enabled FINE16 mode to avoid BIOS ROM width mismatches @ reboot. */
251 	outb(0x80 | inb(ioaddr + 0x0c), ioaddr + 0x0c);
252 	piomode = inb(ioaddr + 0x8);
253 	addr = inb(ioaddr + 0xb);
254 	irqreg = inb(ioaddr + 0xd);
255 
256 	/* Switch back to the station address register set so that the MS-DOS driver
257 	   can find the card after a warm boot. */
258 	outb(reg4, ioaddr + 4);
259 
260 	if (dev->irq < 2) {
261 		unsigned char irqmap[] = {0, 9, 3, 5, 7, 10, 11, 15};
262 		int irq;
263 
264 		/* The IRQ bits are split. */
265 		irq = irqmap[((irqreg & 0x40) >> 4) + ((irqreg & 0x0c) >> 2)];
266 
267 		if (irq == 0) {
268 			printk(", failed to detect IRQ line.\n");
269 			retval =  -EAGAIN;
270 			goto out;
271 		}
272 		dev->irq = irq;
273 		eeprom_irq = 1;
274 	}
275 
276 	/* The 8390 isn't at the base address, so fake the offset */
277 	dev->base_addr = ioaddr+ULTRA_NIC_OFFSET;
278 
279 	{
280 		static const int addr_tbl[4] = {
281 			0x0C0000, 0x0E0000, 0xFC0000, 0xFE0000
282 		};
283 		static const short num_pages_tbl[4] = {
284 			0x20, 0x40, 0x80, 0xff
285 		};
286 
287 		dev->mem_start = ((addr & 0x0f) << 13) + addr_tbl[(addr >> 6) & 3] ;
288 		num_pages = num_pages_tbl[(addr >> 4) & 3];
289 	}
290 
291 	ei_status.name = model_name;
292 	ei_status.word16 = 1;
293 	ei_status.tx_start_page = START_PG;
294 	ei_status.rx_start_page = START_PG + TX_PAGES;
295 	ei_status.stop_page = num_pages;
296 
297 	ei_status.mem = ioremap(dev->mem_start, (ei_status.stop_page - START_PG)*256);
298 	if (!ei_status.mem) {
299 		printk(", failed to ioremap.\n");
300 		retval =  -ENOMEM;
301 		goto out;
302 	}
303 
304 	dev->mem_end = dev->mem_start + (ei_status.stop_page - START_PG)*256;
305 
306 	if (piomode) {
307 		printk(",%s IRQ %d programmed-I/O mode.\n",
308 			   eeprom_irq ? "EEPROM" : "assigned ", dev->irq);
309 		ei_status.block_input = &ultra_pio_input;
310 		ei_status.block_output = &ultra_pio_output;
311 		ei_status.get_8390_hdr = &ultra_pio_get_hdr;
312 	} else {
313 		printk(",%s IRQ %d memory %#lx-%#lx.\n", eeprom_irq ? "" : "assigned ",
314 			   dev->irq, dev->mem_start, dev->mem_end-1);
315 		ei_status.block_input = &ultra_block_input;
316 		ei_status.block_output = &ultra_block_output;
317 		ei_status.get_8390_hdr = &ultra_get_8390_hdr;
318 	}
319 	ei_status.reset_8390 = &ultra_reset_8390;
320 
321 	dev->netdev_ops = &ultra_netdev_ops;
322 	NS8390_init(dev, 0);
323 
324 	retval = register_netdev(dev);
325 	if (retval)
326 		goto out;
327 	return 0;
328 out:
329 	release_region(ioaddr, ULTRA_IO_EXTENT);
330 	return retval;
331 }
332 
333 #ifdef __ISAPNP__
334 static int __init ultra_probe_isapnp(struct net_device *dev)
335 {
336         int i;
337 
338         for (i = 0; ultra_device_ids[i].vendor != 0; i++) {
339 		struct pnp_dev *idev = NULL;
340 
341                 while ((idev = pnp_find_dev(NULL,
342                                             ultra_device_ids[i].vendor,
343                                             ultra_device_ids[i].function,
344                                             idev))) {
345                         /* Avoid already found cards from previous calls */
346                         if (pnp_device_attach(idev) < 0)
347                         	continue;
348                         if (pnp_activate_dev(idev) < 0) {
349                               __again:
350                         	pnp_device_detach(idev);
351                         	continue;
352                         }
353 			/* if no io and irq, search for next */
354 			if (!pnp_port_valid(idev, 0) || !pnp_irq_valid(idev, 0))
355 				goto __again;
356                         /* found it */
357 			dev->base_addr = pnp_port_start(idev, 0);
358 			dev->irq = pnp_irq(idev, 0);
359                         printk(KERN_INFO "smc-ultra.c: ISAPnP reports %s at i/o %#lx, irq %d.\n",
360                                 (char *) ultra_device_ids[i].driver_data,
361                                 dev->base_addr, dev->irq);
362                         if (ultra_probe1(dev, dev->base_addr) != 0) {      /* Shouldn't happen. */
363                                 printk(KERN_ERR "smc-ultra.c: Probe of ISAPnP card at %#lx failed.\n", dev->base_addr);
364                                 pnp_device_detach(idev);
365 				return -ENXIO;
366                         }
367                         ei_status.priv = (unsigned long)idev;
368                         break;
369                 }
370                 if (!idev)
371                         continue;
372                 return 0;
373         }
374 
375         return -ENODEV;
376 }
377 #endif
378 
379 static int
380 ultra_open(struct net_device *dev)
381 {
382 	int retval;
383 	int ioaddr = dev->base_addr - ULTRA_NIC_OFFSET; /* ASIC addr */
384 	unsigned char irq2reg[] = {0, 0, 0x04, 0x08, 0, 0x0C, 0, 0x40,
385 				   0, 0x04, 0x44, 0x48, 0, 0, 0, 0x4C, };
386 
387 	retval = request_irq(dev->irq, ei_interrupt, 0, dev->name, dev);
388 	if (retval)
389 		return retval;
390 
391 	outb(0x00, ioaddr);	/* Disable shared memory for safety. */
392 	outb(0x80, ioaddr + 5);
393 	/* Set the IRQ line. */
394 	outb(inb(ioaddr + 4) | 0x80, ioaddr + 4);
395 	outb((inb(ioaddr + 13) & ~0x4C) | irq2reg[dev->irq], ioaddr + 13);
396 	outb(inb(ioaddr + 4) & 0x7f, ioaddr + 4);
397 
398 	if (ei_status.block_input == &ultra_pio_input) {
399 		outb(0x11, ioaddr + 6);		/* Enable interrupts and PIO. */
400 		outb(0x01, ioaddr + 0x19);  	/* Enable ring read auto-wrap. */
401 	} else
402 		outb(0x01, ioaddr + 6);		/* Enable interrupts and memory. */
403 	/* Set the early receive warning level in window 0 high enough not
404 	   to receive ERW interrupts. */
405 	outb_p(E8390_NODMA+E8390_PAGE0, dev->base_addr);
406 	outb(0xff, dev->base_addr + EN0_ERWCNT);
407 	ei_open(dev);
408 	return 0;
409 }
410 
411 static void
412 ultra_reset_8390(struct net_device *dev)
413 {
414 	int cmd_port = dev->base_addr - ULTRA_NIC_OFFSET; /* ASIC base addr */
415 
416 	outb(ULTRA_RESET, cmd_port);
417 	if (ei_debug > 1) printk("resetting Ultra, t=%ld...", jiffies);
418 	ei_status.txing = 0;
419 
420 	outb(0x00, cmd_port);	/* Disable shared memory for safety. */
421 	outb(0x80, cmd_port + 5);
422 	if (ei_status.block_input == &ultra_pio_input)
423 		outb(0x11, cmd_port + 6);		/* Enable interrupts and PIO. */
424 	else
425 		outb(0x01, cmd_port + 6);		/* Enable interrupts and memory. */
426 
427 	if (ei_debug > 1) printk("reset done\n");
428 }
429 
430 /* Grab the 8390 specific header. Similar to the block_input routine, but
431    we don't need to be concerned with ring wrap as the header will be at
432    the start of a page, so we optimize accordingly. */
433 
434 static void
435 ultra_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr, int ring_page)
436 {
437 	void __iomem *hdr_start = ei_status.mem + ((ring_page - START_PG)<<8);
438 
439 	outb(ULTRA_MEMENB, dev->base_addr - ULTRA_NIC_OFFSET);	/* shmem on */
440 #ifdef __BIG_ENDIAN
441 	/* Officially this is what we are doing, but the readl() is faster */
442 	/* unfortunately it isn't endian aware of the struct               */
443 	memcpy_fromio(hdr, hdr_start, sizeof(struct e8390_pkt_hdr));
444 	hdr->count = le16_to_cpu(hdr->count);
445 #else
446 	((unsigned int*)hdr)[0] = readl(hdr_start);
447 #endif
448 	outb(0x00, dev->base_addr - ULTRA_NIC_OFFSET); /* shmem off */
449 }
450 
451 /* Block input and output are easy on shared memory ethercards, the only
452    complication is when the ring buffer wraps. */
453 
454 static void
455 ultra_block_input(struct net_device *dev, int count, struct sk_buff *skb, int ring_offset)
456 {
457 	void __iomem *xfer_start = ei_status.mem + ring_offset - (START_PG<<8);
458 
459 	/* Enable shared memory. */
460 	outb(ULTRA_MEMENB, dev->base_addr - ULTRA_NIC_OFFSET);
461 
462 	if (ring_offset + count > ei_status.stop_page*256) {
463 		/* We must wrap the input move. */
464 		int semi_count = ei_status.stop_page*256 - ring_offset;
465 		memcpy_fromio(skb->data, xfer_start, semi_count);
466 		count -= semi_count;
467 		memcpy_fromio(skb->data + semi_count, ei_status.mem + TX_PAGES * 256, count);
468 	} else {
469 		memcpy_fromio(skb->data, xfer_start, count);
470 	}
471 
472 	outb(0x00, dev->base_addr - ULTRA_NIC_OFFSET);	/* Disable memory. */
473 }
474 
475 static void
476 ultra_block_output(struct net_device *dev, int count, const unsigned char *buf,
477 				int start_page)
478 {
479 	void __iomem *shmem = ei_status.mem + ((start_page - START_PG)<<8);
480 
481 	/* Enable shared memory. */
482 	outb(ULTRA_MEMENB, dev->base_addr - ULTRA_NIC_OFFSET);
483 
484 	memcpy_toio(shmem, buf, count);
485 
486 	outb(0x00, dev->base_addr - ULTRA_NIC_OFFSET); /* Disable memory. */
487 }
488 
489 /* The identical operations for programmed I/O cards.
490    The PIO model is trivial to use: the 16 bit start address is written
491    byte-sequentially to IOPA, with no intervening I/O operations, and the
492    data is read or written to the IOPD data port.
493    The only potential complication is that the address register is shared
494    and must be always be rewritten between each read/write direction change.
495    This is no problem for us, as the 8390 code ensures that we are single
496    threaded. */
497 static void ultra_pio_get_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr,
498 						int ring_page)
499 {
500 	int ioaddr = dev->base_addr - ULTRA_NIC_OFFSET; /* ASIC addr */
501 	outb(0x00, ioaddr + IOPA);	/* Set the address, LSB first. */
502 	outb(ring_page, ioaddr + IOPA);
503 	insw(ioaddr + IOPD, hdr, sizeof(struct e8390_pkt_hdr)>>1);
504 }
505 
506 static void ultra_pio_input(struct net_device *dev, int count,
507 						  struct sk_buff *skb, int ring_offset)
508 {
509 	int ioaddr = dev->base_addr - ULTRA_NIC_OFFSET; /* ASIC addr */
510     char *buf = skb->data;
511 
512 	/* For now set the address again, although it should already be correct. */
513 	outb(ring_offset, ioaddr + IOPA);	/* Set the address, LSB first. */
514 	outb(ring_offset >> 8, ioaddr + IOPA);
515 	/* We know skbuffs are padded to at least word alignment. */
516 	insw(ioaddr + IOPD, buf, (count+1)>>1);
517 }
518 
519 static void ultra_pio_output(struct net_device *dev, int count,
520 							const unsigned char *buf, const int start_page)
521 {
522 	int ioaddr = dev->base_addr - ULTRA_NIC_OFFSET; /* ASIC addr */
523 	outb(0x00, ioaddr + IOPA);	/* Set the address, LSB first. */
524 	outb(start_page, ioaddr + IOPA);
525 	/* An extra odd byte is OK here as well. */
526 	outsw(ioaddr + IOPD, buf, (count+1)>>1);
527 }
528 
529 static int
530 ultra_close_card(struct net_device *dev)
531 {
532 	int ioaddr = dev->base_addr - ULTRA_NIC_OFFSET; /* CMDREG */
533 
534 	netif_stop_queue(dev);
535 
536 	if (ei_debug > 1)
537 		printk("%s: Shutting down ethercard.\n", dev->name);
538 
539 	outb(0x00, ioaddr + 6);		/* Disable interrupts. */
540 	free_irq(dev->irq, dev);
541 
542 	NS8390_init(dev, 0);
543 
544 	/* We should someday disable shared memory and change to 8-bit mode
545 	   "just in case"... */
546 
547 	return 0;
548 }
549 
550 
551 #ifdef MODULE
552 #define MAX_ULTRA_CARDS	4	/* Max number of Ultra cards per module */
553 static struct net_device *dev_ultra[MAX_ULTRA_CARDS];
554 static int io[MAX_ULTRA_CARDS];
555 static int irq[MAX_ULTRA_CARDS];
556 
557 module_param_array(io, int, NULL, 0);
558 module_param_array(irq, int, NULL, 0);
559 MODULE_PARM_DESC(io, "I/O base address(es)");
560 MODULE_PARM_DESC(irq, "IRQ number(s) (assigned)");
561 MODULE_DESCRIPTION("SMC Ultra/EtherEZ ISA/PnP Ethernet driver");
562 MODULE_LICENSE("GPL");
563 
564 /* This is set up so that only a single autoprobe takes place per call.
565 ISA device autoprobes on a running machine are not recommended. */
566 int __init
567 init_module(void)
568 {
569 	struct net_device *dev;
570 	int this_dev, found = 0;
571 
572 	for (this_dev = 0; this_dev < MAX_ULTRA_CARDS; this_dev++) {
573 		if (io[this_dev] == 0)  {
574 			if (this_dev != 0) break; /* only autoprobe 1st one */
575 			printk(KERN_NOTICE "smc-ultra.c: Presently autoprobing (not recommended) for a single card.\n");
576 		}
577 		dev = alloc_ei_netdev();
578 		if (!dev)
579 			break;
580 		dev->irq = irq[this_dev];
581 		dev->base_addr = io[this_dev];
582 		if (do_ultra_probe(dev) == 0) {
583 			dev_ultra[found++] = dev;
584 			continue;
585 		}
586 		free_netdev(dev);
587 		printk(KERN_WARNING "smc-ultra.c: No SMC Ultra card found (i/o = 0x%x).\n", io[this_dev]);
588 		break;
589 	}
590 	if (found)
591 		return 0;
592 	return -ENXIO;
593 }
594 
595 static void cleanup_card(struct net_device *dev)
596 {
597 	/* NB: ultra_close_card() does free_irq */
598 #ifdef __ISAPNP__
599 	struct pnp_dev *idev = (struct pnp_dev *)ei_status.priv;
600 	if (idev)
601 		pnp_device_detach(idev);
602 #endif
603 	release_region(dev->base_addr - ULTRA_NIC_OFFSET, ULTRA_IO_EXTENT);
604 	iounmap(ei_status.mem);
605 }
606 
607 void __exit
608 cleanup_module(void)
609 {
610 	int this_dev;
611 
612 	for (this_dev = 0; this_dev < MAX_ULTRA_CARDS; this_dev++) {
613 		struct net_device *dev = dev_ultra[this_dev];
614 		if (dev) {
615 			unregister_netdev(dev);
616 			cleanup_card(dev);
617 			free_netdev(dev);
618 		}
619 	}
620 }
621 #endif /* MODULE */
622