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 static u32 ultra_msg_enable;
115 
116 #define START_PG		0x00	/* First page of TX buffer */
117 
118 #define ULTRA_CMDREG	0		/* Offset to ASIC command register. */
119 #define	 ULTRA_RESET	0x80	/* Board reset, in ULTRA_CMDREG. */
120 #define	 ULTRA_MEMENB	0x40	/* Enable the shared memory. */
121 #define IOPD	0x02			/* I/O Pipe Data (16 bits), PIO operation. */
122 #define IOPA	0x07			/* I/O Pipe Address for PIO operation. */
123 #define ULTRA_NIC_OFFSET  16	/* NIC register offset from the base_addr. */
124 #define ULTRA_IO_EXTENT 32
125 #define EN0_ERWCNT		0x08	/* Early receive warning count. */
126 
127 #ifdef CONFIG_NET_POLL_CONTROLLER
128 static void ultra_poll(struct net_device *dev)
129 {
130 	disable_irq(dev->irq);
131 	ei_interrupt(dev->irq, dev);
132 	enable_irq(dev->irq);
133 }
134 #endif
135 /*	Probe for the Ultra.  This looks like a 8013 with the station
136 	address PROM at I/O ports <base>+8 to <base>+13, with a checksum
137 	following.
138 */
139 
140 static int __init do_ultra_probe(struct net_device *dev)
141 {
142 	int i;
143 	int base_addr = dev->base_addr;
144 	int irq = dev->irq;
145 
146 	if (base_addr > 0x1ff)		/* Check a single specified location. */
147 		return ultra_probe1(dev, base_addr);
148 	else if (base_addr != 0)	/* Don't probe at all. */
149 		return -ENXIO;
150 
151 #ifdef __ISAPNP__
152 	/* Look for any installed ISAPnP cards */
153 	if (isapnp_present() && (ultra_probe_isapnp(dev) == 0))
154 		return 0;
155 #endif
156 
157 	for (i = 0; ultra_portlist[i]; i++) {
158 		dev->irq = irq;
159 		if (ultra_probe1(dev, ultra_portlist[i]) == 0)
160 			return 0;
161 	}
162 
163 	return -ENODEV;
164 }
165 
166 #ifndef MODULE
167 struct net_device * __init ultra_probe(int unit)
168 {
169 	struct net_device *dev = alloc_ei_netdev();
170 	int err;
171 
172 	if (!dev)
173 		return ERR_PTR(-ENOMEM);
174 
175 	sprintf(dev->name, "eth%d", unit);
176 	netdev_boot_setup_check(dev);
177 
178 	err = do_ultra_probe(dev);
179 	if (err)
180 		goto out;
181 	return dev;
182 out:
183 	free_netdev(dev);
184 	return ERR_PTR(err);
185 }
186 #endif
187 
188 static const struct net_device_ops ultra_netdev_ops = {
189 	.ndo_open		= ultra_open,
190 	.ndo_stop		= ultra_close_card,
191 
192 	.ndo_start_xmit		= ei_start_xmit,
193 	.ndo_tx_timeout		= ei_tx_timeout,
194 	.ndo_get_stats		= ei_get_stats,
195 	.ndo_set_rx_mode	= ei_set_multicast_list,
196 	.ndo_validate_addr	= eth_validate_addr,
197 	.ndo_set_mac_address 	= eth_mac_addr,
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 	struct ei_device *ei_local = netdev_priv(dev);
215 
216 	if (!request_region(ioaddr, ULTRA_IO_EXTENT, DRV_NAME))
217 		return -EBUSY;
218 
219 	/* Check the ID nibble. */
220 	if ((idreg & 0xF0) != 0x20 			/* SMC Ultra */
221 		&& (idreg & 0xF0) != 0x40) {		/* SMC EtherEZ */
222 		retval = -ENODEV;
223 		goto out;
224 	}
225 
226 	/* Select the station address register set. */
227 	outb(reg4, ioaddr + 4);
228 
229 	for (i = 0; i < 8; i++)
230 		checksum += inb(ioaddr + 8 + i);
231 	if ((checksum & 0xff) != 0xFF) {
232 		retval = -ENODEV;
233 		goto out;
234 	}
235 
236 	if ((ultra_msg_enable & NETIF_MSG_DRV) && (version_printed++ == 0))
237 		netdev_info(dev, version);
238 
239 	model_name = (idreg & 0xF0) == 0x20 ? "SMC Ultra" : "SMC EtherEZ";
240 
241 	for (i = 0; i < 6; i++)
242 		dev->dev_addr[i] = inb(ioaddr + 8 + i);
243 
244 	netdev_info(dev, "%s at %#3x, %pM", model_name,
245 		    ioaddr, dev->dev_addr);
246 
247 	/* Switch from the station address to the alternate register set and
248 	   read the useful registers there. */
249 	outb(0x80 | reg4, ioaddr + 4);
250 
251 	/* Enabled FINE16 mode to avoid BIOS ROM width mismatches @ reboot. */
252 	outb(0x80 | inb(ioaddr + 0x0c), ioaddr + 0x0c);
253 	piomode = inb(ioaddr + 0x8);
254 	addr = inb(ioaddr + 0xb);
255 	irqreg = inb(ioaddr + 0xd);
256 
257 	/* Switch back to the station address register set so that the MS-DOS driver
258 	   can find the card after a warm boot. */
259 	outb(reg4, ioaddr + 4);
260 
261 	if (dev->irq < 2) {
262 		unsigned char irqmap[] = {0, 9, 3, 5, 7, 10, 11, 15};
263 		int irq;
264 
265 		/* The IRQ bits are split. */
266 		irq = irqmap[((irqreg & 0x40) >> 4) + ((irqreg & 0x0c) >> 2)];
267 
268 		if (irq == 0) {
269 			pr_cont(", failed to detect IRQ line.\n");
270 			retval =  -EAGAIN;
271 			goto out;
272 		}
273 		dev->irq = irq;
274 		eeprom_irq = 1;
275 	}
276 
277 	/* The 8390 isn't at the base address, so fake the offset */
278 	dev->base_addr = ioaddr+ULTRA_NIC_OFFSET;
279 
280 	{
281 		static const int addr_tbl[4] = {
282 			0x0C0000, 0x0E0000, 0xFC0000, 0xFE0000
283 		};
284 		static const short num_pages_tbl[4] = {
285 			0x20, 0x40, 0x80, 0xff
286 		};
287 
288 		dev->mem_start = ((addr & 0x0f) << 13) + addr_tbl[(addr >> 6) & 3] ;
289 		num_pages = num_pages_tbl[(addr >> 4) & 3];
290 	}
291 
292 	ei_status.name = model_name;
293 	ei_status.word16 = 1;
294 	ei_status.tx_start_page = START_PG;
295 	ei_status.rx_start_page = START_PG + TX_PAGES;
296 	ei_status.stop_page = num_pages;
297 
298 	ei_status.mem = ioremap(dev->mem_start, (ei_status.stop_page - START_PG)*256);
299 	if (!ei_status.mem) {
300 		pr_cont(", failed to ioremap.\n");
301 		retval =  -ENOMEM;
302 		goto out;
303 	}
304 
305 	dev->mem_end = dev->mem_start + (ei_status.stop_page - START_PG)*256;
306 
307 	if (piomode) {
308 		pr_cont(", %s IRQ %d programmed-I/O mode.\n",
309 			eeprom_irq ? "EEPROM" : "assigned ", dev->irq);
310 		ei_status.block_input = &ultra_pio_input;
311 		ei_status.block_output = &ultra_pio_output;
312 		ei_status.get_8390_hdr = &ultra_pio_get_hdr;
313 	} else {
314 		pr_cont(", %s IRQ %d memory %#lx-%#lx.\n",
315 			eeprom_irq ? "" : "assigned ", dev->irq, dev->mem_start,
316 			dev->mem_end-1);
317 		ei_status.block_input = &ultra_block_input;
318 		ei_status.block_output = &ultra_block_output;
319 		ei_status.get_8390_hdr = &ultra_get_8390_hdr;
320 	}
321 	ei_status.reset_8390 = &ultra_reset_8390;
322 
323 	dev->netdev_ops = &ultra_netdev_ops;
324 	NS8390_init(dev, 0);
325 	ei_local->msg_enable = ultra_msg_enable;
326 
327 	retval = register_netdev(dev);
328 	if (retval)
329 		goto out;
330 	return 0;
331 out:
332 	release_region(ioaddr, ULTRA_IO_EXTENT);
333 	return retval;
334 }
335 
336 #ifdef __ISAPNP__
337 static int __init ultra_probe_isapnp(struct net_device *dev)
338 {
339         int i;
340 
341         for (i = 0; ultra_device_ids[i].vendor != 0; i++) {
342 		struct pnp_dev *idev = NULL;
343 
344                 while ((idev = pnp_find_dev(NULL,
345                                             ultra_device_ids[i].vendor,
346                                             ultra_device_ids[i].function,
347                                             idev))) {
348                         /* Avoid already found cards from previous calls */
349                         if (pnp_device_attach(idev) < 0)
350                         	continue;
351                         if (pnp_activate_dev(idev) < 0) {
352                               __again:
353                         	pnp_device_detach(idev);
354                         	continue;
355                         }
356 			/* if no io and irq, search for next */
357 			if (!pnp_port_valid(idev, 0) || !pnp_irq_valid(idev, 0))
358 				goto __again;
359                         /* found it */
360 			dev->base_addr = pnp_port_start(idev, 0);
361 			dev->irq = pnp_irq(idev, 0);
362 			netdev_info(dev,
363 				    "smc-ultra.c: ISAPnP reports %s at i/o %#lx, irq %d.\n",
364 				    (char *) ultra_device_ids[i].driver_data,
365 				    dev->base_addr, dev->irq);
366                         if (ultra_probe1(dev, dev->base_addr) != 0) {      /* Shouldn't happen. */
367 				netdev_err(dev,
368 					   "smc-ultra.c: Probe of ISAPnP card at %#lx failed.\n",
369 					   dev->base_addr);
370 				pnp_device_detach(idev);
371 				return -ENXIO;
372                         }
373                         ei_status.priv = (unsigned long)idev;
374                         break;
375                 }
376                 if (!idev)
377                         continue;
378                 return 0;
379         }
380 
381         return -ENODEV;
382 }
383 #endif
384 
385 static int
386 ultra_open(struct net_device *dev)
387 {
388 	int retval;
389 	int ioaddr = dev->base_addr - ULTRA_NIC_OFFSET; /* ASIC addr */
390 	unsigned char irq2reg[] = {0, 0, 0x04, 0x08, 0, 0x0C, 0, 0x40,
391 				   0, 0x04, 0x44, 0x48, 0, 0, 0, 0x4C, };
392 
393 	retval = request_irq(dev->irq, ei_interrupt, 0, dev->name, dev);
394 	if (retval)
395 		return retval;
396 
397 	outb(0x00, ioaddr);	/* Disable shared memory for safety. */
398 	outb(0x80, ioaddr + 5);
399 	/* Set the IRQ line. */
400 	outb(inb(ioaddr + 4) | 0x80, ioaddr + 4);
401 	outb((inb(ioaddr + 13) & ~0x4C) | irq2reg[dev->irq], ioaddr + 13);
402 	outb(inb(ioaddr + 4) & 0x7f, ioaddr + 4);
403 
404 	if (ei_status.block_input == &ultra_pio_input) {
405 		outb(0x11, ioaddr + 6);		/* Enable interrupts and PIO. */
406 		outb(0x01, ioaddr + 0x19);  	/* Enable ring read auto-wrap. */
407 	} else
408 		outb(0x01, ioaddr + 6);		/* Enable interrupts and memory. */
409 	/* Set the early receive warning level in window 0 high enough not
410 	   to receive ERW interrupts. */
411 	outb_p(E8390_NODMA+E8390_PAGE0, dev->base_addr);
412 	outb(0xff, dev->base_addr + EN0_ERWCNT);
413 	ei_open(dev);
414 	return 0;
415 }
416 
417 static void
418 ultra_reset_8390(struct net_device *dev)
419 {
420 	int cmd_port = dev->base_addr - ULTRA_NIC_OFFSET; /* ASIC base addr */
421 	struct ei_device *ei_local = netdev_priv(dev);
422 
423 	outb(ULTRA_RESET, cmd_port);
424 	netif_dbg(ei_local, hw, dev, "resetting Ultra, t=%ld...\n", jiffies);
425 	ei_status.txing = 0;
426 
427 	outb(0x00, cmd_port);	/* Disable shared memory for safety. */
428 	outb(0x80, cmd_port + 5);
429 	if (ei_status.block_input == &ultra_pio_input)
430 		outb(0x11, cmd_port + 6);		/* Enable interrupts and PIO. */
431 	else
432 		outb(0x01, cmd_port + 6);		/* Enable interrupts and memory. */
433 
434 	netif_dbg(ei_local, hw, dev, "reset done\n");
435 }
436 
437 /* Grab the 8390 specific header. Similar to the block_input routine, but
438    we don't need to be concerned with ring wrap as the header will be at
439    the start of a page, so we optimize accordingly. */
440 
441 static void
442 ultra_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr, int ring_page)
443 {
444 	void __iomem *hdr_start = ei_status.mem + ((ring_page - START_PG)<<8);
445 
446 	outb(ULTRA_MEMENB, dev->base_addr - ULTRA_NIC_OFFSET);	/* shmem on */
447 #ifdef __BIG_ENDIAN
448 	/* Officially this is what we are doing, but the readl() is faster */
449 	/* unfortunately it isn't endian aware of the struct               */
450 	memcpy_fromio(hdr, hdr_start, sizeof(struct e8390_pkt_hdr));
451 	hdr->count = le16_to_cpu(hdr->count);
452 #else
453 	((unsigned int*)hdr)[0] = readl(hdr_start);
454 #endif
455 	outb(0x00, dev->base_addr - ULTRA_NIC_OFFSET); /* shmem off */
456 }
457 
458 /* Block input and output are easy on shared memory ethercards, the only
459    complication is when the ring buffer wraps. */
460 
461 static void
462 ultra_block_input(struct net_device *dev, int count, struct sk_buff *skb, int ring_offset)
463 {
464 	void __iomem *xfer_start = ei_status.mem + ring_offset - (START_PG<<8);
465 
466 	/* Enable shared memory. */
467 	outb(ULTRA_MEMENB, dev->base_addr - ULTRA_NIC_OFFSET);
468 
469 	if (ring_offset + count > ei_status.stop_page*256) {
470 		/* We must wrap the input move. */
471 		int semi_count = ei_status.stop_page*256 - ring_offset;
472 		memcpy_fromio(skb->data, xfer_start, semi_count);
473 		count -= semi_count;
474 		memcpy_fromio(skb->data + semi_count, ei_status.mem + TX_PAGES * 256, count);
475 	} else {
476 		memcpy_fromio(skb->data, xfer_start, count);
477 	}
478 
479 	outb(0x00, dev->base_addr - ULTRA_NIC_OFFSET);	/* Disable memory. */
480 }
481 
482 static void
483 ultra_block_output(struct net_device *dev, int count, const unsigned char *buf,
484 				int start_page)
485 {
486 	void __iomem *shmem = ei_status.mem + ((start_page - START_PG)<<8);
487 
488 	/* Enable shared memory. */
489 	outb(ULTRA_MEMENB, dev->base_addr - ULTRA_NIC_OFFSET);
490 
491 	memcpy_toio(shmem, buf, count);
492 
493 	outb(0x00, dev->base_addr - ULTRA_NIC_OFFSET); /* Disable memory. */
494 }
495 
496 /* The identical operations for programmed I/O cards.
497    The PIO model is trivial to use: the 16 bit start address is written
498    byte-sequentially to IOPA, with no intervening I/O operations, and the
499    data is read or written to the IOPD data port.
500    The only potential complication is that the address register is shared
501    and must be always be rewritten between each read/write direction change.
502    This is no problem for us, as the 8390 code ensures that we are single
503    threaded. */
504 static void ultra_pio_get_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr,
505 						int ring_page)
506 {
507 	int ioaddr = dev->base_addr - ULTRA_NIC_OFFSET; /* ASIC addr */
508 	outb(0x00, ioaddr + IOPA);	/* Set the address, LSB first. */
509 	outb(ring_page, ioaddr + IOPA);
510 	insw(ioaddr + IOPD, hdr, sizeof(struct e8390_pkt_hdr)>>1);
511 }
512 
513 static void ultra_pio_input(struct net_device *dev, int count,
514 						  struct sk_buff *skb, int ring_offset)
515 {
516 	int ioaddr = dev->base_addr - ULTRA_NIC_OFFSET; /* ASIC addr */
517     char *buf = skb->data;
518 
519 	/* For now set the address again, although it should already be correct. */
520 	outb(ring_offset, ioaddr + IOPA);	/* Set the address, LSB first. */
521 	outb(ring_offset >> 8, ioaddr + IOPA);
522 	/* We know skbuffs are padded to at least word alignment. */
523 	insw(ioaddr + IOPD, buf, (count+1)>>1);
524 }
525 
526 static void ultra_pio_output(struct net_device *dev, int count,
527 							const unsigned char *buf, const int start_page)
528 {
529 	int ioaddr = dev->base_addr - ULTRA_NIC_OFFSET; /* ASIC addr */
530 	outb(0x00, ioaddr + IOPA);	/* Set the address, LSB first. */
531 	outb(start_page, ioaddr + IOPA);
532 	/* An extra odd byte is OK here as well. */
533 	outsw(ioaddr + IOPD, buf, (count+1)>>1);
534 }
535 
536 static int
537 ultra_close_card(struct net_device *dev)
538 {
539 	int ioaddr = dev->base_addr - ULTRA_NIC_OFFSET; /* CMDREG */
540 	struct ei_device *ei_local = netdev_priv(dev);
541 
542 	netif_stop_queue(dev);
543 
544 	netif_dbg(ei_local, ifdown, dev, "Shutting down ethercard.\n");
545 
546 	outb(0x00, ioaddr + 6);		/* Disable interrupts. */
547 	free_irq(dev->irq, dev);
548 
549 	NS8390_init(dev, 0);
550 
551 	/* We should someday disable shared memory and change to 8-bit mode
552 	   "just in case"... */
553 
554 	return 0;
555 }
556 
557 
558 #ifdef MODULE
559 #define MAX_ULTRA_CARDS	4	/* Max number of Ultra cards per module */
560 static struct net_device *dev_ultra[MAX_ULTRA_CARDS];
561 static int io[MAX_ULTRA_CARDS];
562 static int irq[MAX_ULTRA_CARDS];
563 
564 module_param_hw_array(io, int, ioport, NULL, 0);
565 module_param_hw_array(irq, int, irq, NULL, 0);
566 module_param_named(msg_enable, ultra_msg_enable, uint, 0444);
567 MODULE_PARM_DESC(io, "I/O base address(es)");
568 MODULE_PARM_DESC(irq, "IRQ number(s) (assigned)");
569 MODULE_PARM_DESC(msg_enable, "Debug message level (see linux/netdevice.h for bitmap)");
570 MODULE_DESCRIPTION("SMC Ultra/EtherEZ ISA/PnP Ethernet driver");
571 MODULE_LICENSE("GPL");
572 
573 /* This is set up so that only a single autoprobe takes place per call.
574 ISA device autoprobes on a running machine are not recommended. */
575 int __init
576 init_module(void)
577 {
578 	struct net_device *dev;
579 	int this_dev, found = 0;
580 
581 	for (this_dev = 0; this_dev < MAX_ULTRA_CARDS; this_dev++) {
582 		if (io[this_dev] == 0)  {
583 			if (this_dev != 0) break; /* only autoprobe 1st one */
584 			printk(KERN_NOTICE "smc-ultra.c: Presently autoprobing (not recommended) for a single card.\n");
585 		}
586 		dev = alloc_ei_netdev();
587 		if (!dev)
588 			break;
589 		dev->irq = irq[this_dev];
590 		dev->base_addr = io[this_dev];
591 		if (do_ultra_probe(dev) == 0) {
592 			dev_ultra[found++] = dev;
593 			continue;
594 		}
595 		free_netdev(dev);
596 		printk(KERN_WARNING "smc-ultra.c: No SMC Ultra card found (i/o = 0x%x).\n", io[this_dev]);
597 		break;
598 	}
599 	if (found)
600 		return 0;
601 	return -ENXIO;
602 }
603 
604 static void cleanup_card(struct net_device *dev)
605 {
606 	/* NB: ultra_close_card() does free_irq */
607 #ifdef __ISAPNP__
608 	struct pnp_dev *idev = (struct pnp_dev *)ei_status.priv;
609 	if (idev)
610 		pnp_device_detach(idev);
611 #endif
612 	release_region(dev->base_addr - ULTRA_NIC_OFFSET, ULTRA_IO_EXTENT);
613 	iounmap(ei_status.mem);
614 }
615 
616 void __exit
617 cleanup_module(void)
618 {
619 	int this_dev;
620 
621 	for (this_dev = 0; this_dev < MAX_ULTRA_CARDS; this_dev++) {
622 		struct net_device *dev = dev_ultra[this_dev];
623 		if (dev) {
624 			unregister_netdev(dev);
625 			cleanup_card(dev);
626 			free_netdev(dev);
627 		}
628 	}
629 }
630 #endif /* MODULE */
631