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 	u8 macaddr[ETH_ALEN];
208 	const char *model_name;
209 	unsigned char eeprom_irq = 0;
210 	static unsigned version_printed;
211 	/* Values from various config regs. */
212 	unsigned char num_pages, irqreg, addr, piomode;
213 	unsigned char idreg = inb(ioaddr + 7);
214 	unsigned char reg4 = inb(ioaddr + 4) & 0x7f;
215 	struct ei_device *ei_local = netdev_priv(dev);
216 
217 	if (!request_region(ioaddr, ULTRA_IO_EXTENT, DRV_NAME))
218 		return -EBUSY;
219 
220 	/* Check the ID nibble. */
221 	if ((idreg & 0xF0) != 0x20 			/* SMC Ultra */
222 		&& (idreg & 0xF0) != 0x40) {		/* SMC EtherEZ */
223 		retval = -ENODEV;
224 		goto out;
225 	}
226 
227 	/* Select the station address register set. */
228 	outb(reg4, ioaddr + 4);
229 
230 	for (i = 0; i < 8; i++)
231 		checksum += inb(ioaddr + 8 + i);
232 	if ((checksum & 0xff) != 0xFF) {
233 		retval = -ENODEV;
234 		goto out;
235 	}
236 
237 	if ((ultra_msg_enable & NETIF_MSG_DRV) && (version_printed++ == 0))
238 		netdev_info(dev, version);
239 
240 	model_name = (idreg & 0xF0) == 0x20 ? "SMC Ultra" : "SMC EtherEZ";
241 
242 	for (i = 0; i < 6; i++)
243 		macaddr[i] = inb(ioaddr + 8 + i);
244 	eth_hw_addr_set(dev, macaddr);
245 
246 	netdev_info(dev, "%s at %#3x, %pM", model_name,
247 		    ioaddr, dev->dev_addr);
248 
249 	/* Switch from the station address to the alternate register set and
250 	   read the useful registers there. */
251 	outb(0x80 | reg4, ioaddr + 4);
252 
253 	/* Enabled FINE16 mode to avoid BIOS ROM width mismatches @ reboot. */
254 	outb(0x80 | inb(ioaddr + 0x0c), ioaddr + 0x0c);
255 	piomode = inb(ioaddr + 0x8);
256 	addr = inb(ioaddr + 0xb);
257 	irqreg = inb(ioaddr + 0xd);
258 
259 	/* Switch back to the station address register set so that the MS-DOS driver
260 	   can find the card after a warm boot. */
261 	outb(reg4, ioaddr + 4);
262 
263 	if (dev->irq < 2) {
264 		unsigned char irqmap[] = {0, 9, 3, 5, 7, 10, 11, 15};
265 		int irq;
266 
267 		/* The IRQ bits are split. */
268 		irq = irqmap[((irqreg & 0x40) >> 4) + ((irqreg & 0x0c) >> 2)];
269 
270 		if (irq == 0) {
271 			pr_cont(", failed to detect IRQ line.\n");
272 			retval =  -EAGAIN;
273 			goto out;
274 		}
275 		dev->irq = irq;
276 		eeprom_irq = 1;
277 	}
278 
279 	/* The 8390 isn't at the base address, so fake the offset */
280 	dev->base_addr = ioaddr+ULTRA_NIC_OFFSET;
281 
282 	{
283 		static const int addr_tbl[4] = {
284 			0x0C0000, 0x0E0000, 0xFC0000, 0xFE0000
285 		};
286 		static const short num_pages_tbl[4] = {
287 			0x20, 0x40, 0x80, 0xff
288 		};
289 
290 		dev->mem_start = ((addr & 0x0f) << 13) + addr_tbl[(addr >> 6) & 3] ;
291 		num_pages = num_pages_tbl[(addr >> 4) & 3];
292 	}
293 
294 	ei_status.name = model_name;
295 	ei_status.word16 = 1;
296 	ei_status.tx_start_page = START_PG;
297 	ei_status.rx_start_page = START_PG + TX_PAGES;
298 	ei_status.stop_page = num_pages;
299 
300 	ei_status.mem = ioremap(dev->mem_start, (ei_status.stop_page - START_PG)*256);
301 	if (!ei_status.mem) {
302 		pr_cont(", failed to ioremap.\n");
303 		retval =  -ENOMEM;
304 		goto out;
305 	}
306 
307 	dev->mem_end = dev->mem_start + (ei_status.stop_page - START_PG)*256;
308 
309 	if (piomode) {
310 		pr_cont(", %s IRQ %d programmed-I/O mode.\n",
311 			eeprom_irq ? "EEPROM" : "assigned ", dev->irq);
312 		ei_status.block_input = &ultra_pio_input;
313 		ei_status.block_output = &ultra_pio_output;
314 		ei_status.get_8390_hdr = &ultra_pio_get_hdr;
315 	} else {
316 		pr_cont(", %s IRQ %d memory %#lx-%#lx.\n",
317 			eeprom_irq ? "" : "assigned ", dev->irq, dev->mem_start,
318 			dev->mem_end-1);
319 		ei_status.block_input = &ultra_block_input;
320 		ei_status.block_output = &ultra_block_output;
321 		ei_status.get_8390_hdr = &ultra_get_8390_hdr;
322 	}
323 	ei_status.reset_8390 = &ultra_reset_8390;
324 
325 	dev->netdev_ops = &ultra_netdev_ops;
326 	NS8390_init(dev, 0);
327 	ei_local->msg_enable = ultra_msg_enable;
328 
329 	retval = register_netdev(dev);
330 	if (retval)
331 		goto out;
332 	return 0;
333 out:
334 	release_region(ioaddr, ULTRA_IO_EXTENT);
335 	return retval;
336 }
337 
338 #ifdef __ISAPNP__
339 static int __init ultra_probe_isapnp(struct net_device *dev)
340 {
341         int i;
342 
343         for (i = 0; ultra_device_ids[i].vendor != 0; i++) {
344 		struct pnp_dev *idev = NULL;
345 
346                 while ((idev = pnp_find_dev(NULL,
347                                             ultra_device_ids[i].vendor,
348                                             ultra_device_ids[i].function,
349                                             idev))) {
350                         /* Avoid already found cards from previous calls */
351                         if (pnp_device_attach(idev) < 0)
352 				continue;
353                         if (pnp_activate_dev(idev) < 0) {
354                               __again:
355 				pnp_device_detach(idev);
356 				continue;
357                         }
358 			/* if no io and irq, search for next */
359 			if (!pnp_port_valid(idev, 0) || !pnp_irq_valid(idev, 0))
360 				goto __again;
361                         /* found it */
362 			dev->base_addr = pnp_port_start(idev, 0);
363 			dev->irq = pnp_irq(idev, 0);
364 			netdev_info(dev,
365 				    "smc-ultra.c: ISAPnP reports %s at i/o %#lx, irq %d.\n",
366 				    (char *) ultra_device_ids[i].driver_data,
367 				    dev->base_addr, dev->irq);
368                         if (ultra_probe1(dev, dev->base_addr) != 0) {      /* Shouldn't happen. */
369 				netdev_err(dev,
370 					   "smc-ultra.c: Probe of ISAPnP card at %#lx failed.\n",
371 					   dev->base_addr);
372 				pnp_device_detach(idev);
373 				return -ENXIO;
374                         }
375                         ei_status.priv = (unsigned long)idev;
376                         break;
377                 }
378                 if (!idev)
379                         continue;
380                 return 0;
381         }
382 
383         return -ENODEV;
384 }
385 #endif
386 
387 static int
388 ultra_open(struct net_device *dev)
389 {
390 	int retval;
391 	int ioaddr = dev->base_addr - ULTRA_NIC_OFFSET; /* ASIC addr */
392 	unsigned char irq2reg[] = {0, 0, 0x04, 0x08, 0, 0x0C, 0, 0x40,
393 				   0, 0x04, 0x44, 0x48, 0, 0, 0, 0x4C, };
394 
395 	retval = request_irq(dev->irq, ei_interrupt, 0, dev->name, dev);
396 	if (retval)
397 		return retval;
398 
399 	outb(0x00, ioaddr);	/* Disable shared memory for safety. */
400 	outb(0x80, ioaddr + 5);
401 	/* Set the IRQ line. */
402 	outb(inb(ioaddr + 4) | 0x80, ioaddr + 4);
403 	outb((inb(ioaddr + 13) & ~0x4C) | irq2reg[dev->irq], ioaddr + 13);
404 	outb(inb(ioaddr + 4) & 0x7f, ioaddr + 4);
405 
406 	if (ei_status.block_input == &ultra_pio_input) {
407 		outb(0x11, ioaddr + 6);		/* Enable interrupts and PIO. */
408 		outb(0x01, ioaddr + 0x19);  	/* Enable ring read auto-wrap. */
409 	} else
410 		outb(0x01, ioaddr + 6);		/* Enable interrupts and memory. */
411 	/* Set the early receive warning level in window 0 high enough not
412 	   to receive ERW interrupts. */
413 	outb_p(E8390_NODMA+E8390_PAGE0, dev->base_addr);
414 	outb(0xff, dev->base_addr + EN0_ERWCNT);
415 	ei_open(dev);
416 	return 0;
417 }
418 
419 static void
420 ultra_reset_8390(struct net_device *dev)
421 {
422 	int cmd_port = dev->base_addr - ULTRA_NIC_OFFSET; /* ASIC base addr */
423 	struct ei_device *ei_local = netdev_priv(dev);
424 
425 	outb(ULTRA_RESET, cmd_port);
426 	netif_dbg(ei_local, hw, dev, "resetting Ultra, t=%ld...\n", jiffies);
427 	ei_status.txing = 0;
428 
429 	outb(0x00, cmd_port);	/* Disable shared memory for safety. */
430 	outb(0x80, cmd_port + 5);
431 	if (ei_status.block_input == &ultra_pio_input)
432 		outb(0x11, cmd_port + 6);		/* Enable interrupts and PIO. */
433 	else
434 		outb(0x01, cmd_port + 6);		/* Enable interrupts and memory. */
435 
436 	netif_dbg(ei_local, hw, dev, "reset done\n");
437 }
438 
439 /* Grab the 8390 specific header. Similar to the block_input routine, but
440    we don't need to be concerned with ring wrap as the header will be at
441    the start of a page, so we optimize accordingly. */
442 
443 static void
444 ultra_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr, int ring_page)
445 {
446 	void __iomem *hdr_start = ei_status.mem + ((ring_page - START_PG)<<8);
447 
448 	outb(ULTRA_MEMENB, dev->base_addr - ULTRA_NIC_OFFSET);	/* shmem on */
449 #ifdef __BIG_ENDIAN
450 	/* Officially this is what we are doing, but the readl() is faster */
451 	/* unfortunately it isn't endian aware of the struct               */
452 	memcpy_fromio(hdr, hdr_start, sizeof(struct e8390_pkt_hdr));
453 	hdr->count = le16_to_cpu(hdr->count);
454 #else
455 	((unsigned int*)hdr)[0] = readl(hdr_start);
456 #endif
457 	outb(0x00, dev->base_addr - ULTRA_NIC_OFFSET); /* shmem off */
458 }
459 
460 /* Block input and output are easy on shared memory ethercards, the only
461    complication is when the ring buffer wraps. */
462 
463 static void
464 ultra_block_input(struct net_device *dev, int count, struct sk_buff *skb, int ring_offset)
465 {
466 	void __iomem *xfer_start = ei_status.mem + ring_offset - (START_PG<<8);
467 
468 	/* Enable shared memory. */
469 	outb(ULTRA_MEMENB, dev->base_addr - ULTRA_NIC_OFFSET);
470 
471 	if (ring_offset + count > ei_status.stop_page*256) {
472 		/* We must wrap the input move. */
473 		int semi_count = ei_status.stop_page*256 - ring_offset;
474 		memcpy_fromio(skb->data, xfer_start, semi_count);
475 		count -= semi_count;
476 		memcpy_fromio(skb->data + semi_count, ei_status.mem + TX_PAGES * 256, count);
477 	} else {
478 		memcpy_fromio(skb->data, xfer_start, count);
479 	}
480 
481 	outb(0x00, dev->base_addr - ULTRA_NIC_OFFSET);	/* Disable memory. */
482 }
483 
484 static void
485 ultra_block_output(struct net_device *dev, int count, const unsigned char *buf,
486 				int start_page)
487 {
488 	void __iomem *shmem = ei_status.mem + ((start_page - START_PG)<<8);
489 
490 	/* Enable shared memory. */
491 	outb(ULTRA_MEMENB, dev->base_addr - ULTRA_NIC_OFFSET);
492 
493 	memcpy_toio(shmem, buf, count);
494 
495 	outb(0x00, dev->base_addr - ULTRA_NIC_OFFSET); /* Disable memory. */
496 }
497 
498 /* The identical operations for programmed I/O cards.
499    The PIO model is trivial to use: the 16 bit start address is written
500    byte-sequentially to IOPA, with no intervening I/O operations, and the
501    data is read or written to the IOPD data port.
502    The only potential complication is that the address register is shared
503    and must be always be rewritten between each read/write direction change.
504    This is no problem for us, as the 8390 code ensures that we are single
505    threaded. */
506 static void ultra_pio_get_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr,
507 						int ring_page)
508 {
509 	int ioaddr = dev->base_addr - ULTRA_NIC_OFFSET; /* ASIC addr */
510 	outb(0x00, ioaddr + IOPA);	/* Set the address, LSB first. */
511 	outb(ring_page, ioaddr + IOPA);
512 	insw(ioaddr + IOPD, hdr, sizeof(struct e8390_pkt_hdr)>>1);
513 }
514 
515 static void ultra_pio_input(struct net_device *dev, int count,
516 						  struct sk_buff *skb, int ring_offset)
517 {
518 	int ioaddr = dev->base_addr - ULTRA_NIC_OFFSET; /* ASIC addr */
519     char *buf = skb->data;
520 
521 	/* For now set the address again, although it should already be correct. */
522 	outb(ring_offset, ioaddr + IOPA);	/* Set the address, LSB first. */
523 	outb(ring_offset >> 8, ioaddr + IOPA);
524 	/* We know skbuffs are padded to at least word alignment. */
525 	insw(ioaddr + IOPD, buf, (count+1)>>1);
526 }
527 static void ultra_pio_output(struct net_device *dev, int count,
528 							const unsigned char *buf, const int start_page)
529 {
530 	int ioaddr = dev->base_addr - ULTRA_NIC_OFFSET; /* ASIC addr */
531 	outb(0x00, ioaddr + IOPA);	/* Set the address, LSB first. */
532 	outb(start_page, ioaddr + IOPA);
533 	/* An extra odd byte is OK here as well. */
534 	outsw(ioaddr + IOPD, buf, (count+1)>>1);
535 }
536 
537 static int
538 ultra_close_card(struct net_device *dev)
539 {
540 	int ioaddr = dev->base_addr - ULTRA_NIC_OFFSET; /* CMDREG */
541 	struct ei_device *ei_local = netdev_priv(dev);
542 
543 	netif_stop_queue(dev);
544 
545 	netif_dbg(ei_local, ifdown, dev, "Shutting down ethercard.\n");
546 
547 	outb(0x00, ioaddr + 6);		/* Disable interrupts. */
548 	free_irq(dev->irq, dev);
549 
550 	NS8390_init(dev, 0);
551 
552 	/* We should someday disable shared memory and change to 8-bit mode
553 	   "just in case"... */
554 
555 	return 0;
556 }
557 
558 
559 #ifdef MODULE
560 #define MAX_ULTRA_CARDS	4	/* Max number of Ultra cards per module */
561 static struct net_device *dev_ultra[MAX_ULTRA_CARDS];
562 static int io[MAX_ULTRA_CARDS];
563 static int irq[MAX_ULTRA_CARDS];
564 
565 module_param_hw_array(io, int, ioport, NULL, 0);
566 module_param_hw_array(irq, int, irq, NULL, 0);
567 module_param_named(msg_enable, ultra_msg_enable, uint, 0444);
568 MODULE_PARM_DESC(io, "I/O base address(es)");
569 MODULE_PARM_DESC(irq, "IRQ number(s) (assigned)");
570 MODULE_PARM_DESC(msg_enable, "Debug message level (see linux/netdevice.h for bitmap)");
571 MODULE_DESCRIPTION("SMC Ultra/EtherEZ ISA/PnP Ethernet driver");
572 MODULE_LICENSE("GPL");
573 
574 /* This is set up so that only a single autoprobe takes place per call.
575 ISA device autoprobes on a running machine are not recommended. */
576 static int __init ultra_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 module_init(ultra_init_module);
604 
605 static void cleanup_card(struct net_device *dev)
606 {
607 	/* NB: ultra_close_card() does free_irq */
608 #ifdef __ISAPNP__
609 	struct pnp_dev *idev = (struct pnp_dev *)ei_status.priv;
610 	if (idev)
611 		pnp_device_detach(idev);
612 #endif
613 	release_region(dev->base_addr - ULTRA_NIC_OFFSET, ULTRA_IO_EXTENT);
614 	iounmap(ei_status.mem);
615 }
616 
617 static void __exit ultra_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 module_exit(ultra_cleanup_module);
631 #endif /* MODULE */
632