1 // SPDX-License-Identifier: GPL-1.0+
2 /* smc-ultra.c: A SMC Ultra ethernet driver for linux. */
3 /*
4 	This is a driver for the SMC Ultra and SMC EtherEZ ISA ethercards.
5 
6 	Written 1993-1998 by Donald Becker.
7 
8 	Copyright 1993 United States Government as represented by the
9 	Director, National Security Agency.
10 
11 	The author may be reached as becker@scyld.com, or C/O
12 	Scyld Computing Corporation
13 	410 Severn Ave., Suite 210
14 	Annapolis MD 21403
15 
16 	This driver uses the cards in the 8390-compatible mode.
17 	Most of the run-time complexity is handled by the generic code in
18 	8390.c.  The code in this file is responsible for
19 
20 		ultra_probe()	 	Detecting and initializing the card.
21 		ultra_probe1()
22 		ultra_probe_isapnp()
23 
24 		ultra_open()		The card-specific details of starting, stopping
25 		ultra_reset_8390()	and resetting the 8390 NIC core.
26 		ultra_close()
27 
28 		ultra_block_input()		Routines for reading and writing blocks of
29 		ultra_block_output()	packet buffer memory.
30 		ultra_pio_input()
31 		ultra_pio_output()
32 
33 	This driver enables the shared memory only when doing the actual data
34 	transfers to avoid a bug in early version of the card that corrupted
35 	data transferred by a AHA1542.
36 
37 	This driver now supports the programmed-I/O (PIO) data transfer mode of
38 	the EtherEZ. It does not use the non-8390-compatible "Altego" mode.
39 	That support (if available) is in smc-ez.c.
40 
41 	Changelog:
42 
43 	Paul Gortmaker	: multiple card support for module users.
44 	Donald Becker	: 4/17/96 PIO support, minor potential problems avoided.
45 	Donald Becker	: 6/6/96 correctly set auto-wrap bit.
46 	Alexander Sotirov : 1/20/01 Added support for ISAPnP cards
47 
48 	Note about the ISA PnP support:
49 
50 	This driver can not autoprobe for more than one SMC EtherEZ PnP card.
51 	You have to configure the second card manually through the /proc/isapnp
52 	interface and then load the module with an explicit io=0x___ option.
53 */
54 
55 static const char version[] =
56 	"smc-ultra.c:v2.02 2/3/98 Donald Becker (becker@cesdis.gsfc.nasa.gov)\n";
57 
58 #include <linux/module.h>
59 #include <linux/kernel.h>
60 #include <linux/errno.h>
61 #include <linux/string.h>
62 #include <linux/init.h>
63 #include <linux/interrupt.h>
64 #include <linux/isapnp.h>
65 #include <linux/netdevice.h>
66 #include <linux/etherdevice.h>
67 #include <net/Space.h>
68 
69 #include <asm/io.h>
70 #include <asm/irq.h>
71 
72 #include "8390.h"
73 
74 #define DRV_NAME "smc-ultra"
75 
76 /* A zero-terminated list of I/O addresses to be probed. */
77 static unsigned int ultra_portlist[] __initdata =
78 {0x200, 0x220, 0x240, 0x280, 0x300, 0x340, 0x380, 0};
79 
80 static int ultra_probe1(struct net_device *dev, int ioaddr);
81 
82 #ifdef __ISAPNP__
83 static int ultra_probe_isapnp(struct net_device *dev);
84 #endif
85 
86 static int ultra_open(struct net_device *dev);
87 static void ultra_reset_8390(struct net_device *dev);
88 static void ultra_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr,
89 						int ring_page);
90 static void ultra_block_input(struct net_device *dev, int count,
91 						  struct sk_buff *skb, int ring_offset);
92 static void ultra_block_output(struct net_device *dev, int count,
93 							const unsigned char *buf, const int start_page);
94 static void ultra_pio_get_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr,
95 						int ring_page);
96 static void ultra_pio_input(struct net_device *dev, int count,
97 						  struct sk_buff *skb, int ring_offset);
98 static void ultra_pio_output(struct net_device *dev, int count,
99 							 const unsigned char *buf, const int start_page);
100 static int ultra_close_card(struct net_device *dev);
101 
102 #ifdef __ISAPNP__
103 static struct isapnp_device_id ultra_device_ids[] __initdata = {
104         {       ISAPNP_VENDOR('S','M','C'), ISAPNP_FUNCTION(0x8416),
105                 ISAPNP_VENDOR('S','M','C'), ISAPNP_FUNCTION(0x8416),
106                 (long) "SMC EtherEZ (8416)" },
107         { }	/* terminate list */
108 };
109 
110 MODULE_DEVICE_TABLE(isapnp, ultra_device_ids);
111 #endif
112 
113 static u32 ultra_msg_enable;
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 #ifdef CONFIG_NET_POLL_CONTROLLER
198 	.ndo_poll_controller 	= ultra_poll,
199 #endif
200 };
201 
202 static int __init ultra_probe1(struct net_device *dev, int ioaddr)
203 {
204 	int i, retval;
205 	int checksum = 0;
206 	u8 macaddr[ETH_ALEN];
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 		macaddr[i] = inb(ioaddr + 8 + i);
243 	eth_hw_addr_set(dev, macaddr);
244 
245 	netdev_info(dev, "%s at %#3x, %pM", model_name,
246 		    ioaddr, dev->dev_addr);
247 
248 	/* Switch from the station address to the alternate register set and
249 	   read the useful registers there. */
250 	outb(0x80 | reg4, ioaddr + 4);
251 
252 	/* Enabled FINE16 mode to avoid BIOS ROM width mismatches @ reboot. */
253 	outb(0x80 | inb(ioaddr + 0x0c), ioaddr + 0x0c);
254 	piomode = inb(ioaddr + 0x8);
255 	addr = inb(ioaddr + 0xb);
256 	irqreg = inb(ioaddr + 0xd);
257 
258 	/* Switch back to the station address register set so that the MS-DOS driver
259 	   can find the card after a warm boot. */
260 	outb(reg4, ioaddr + 4);
261 
262 	if (dev->irq < 2) {
263 		unsigned char irqmap[] = {0, 9, 3, 5, 7, 10, 11, 15};
264 		int irq;
265 
266 		/* The IRQ bits are split. */
267 		irq = irqmap[((irqreg & 0x40) >> 4) + ((irqreg & 0x0c) >> 2)];
268 
269 		if (irq == 0) {
270 			pr_cont(", failed to detect IRQ line.\n");
271 			retval =  -EAGAIN;
272 			goto out;
273 		}
274 		dev->irq = irq;
275 		eeprom_irq = 1;
276 	}
277 
278 	/* The 8390 isn't at the base address, so fake the offset */
279 	dev->base_addr = ioaddr+ULTRA_NIC_OFFSET;
280 
281 	{
282 		static const int addr_tbl[4] = {
283 			0x0C0000, 0x0E0000, 0xFC0000, 0xFE0000
284 		};
285 		static const short num_pages_tbl[4] = {
286 			0x20, 0x40, 0x80, 0xff
287 		};
288 
289 		dev->mem_start = ((addr & 0x0f) << 13) + addr_tbl[(addr >> 6) & 3] ;
290 		num_pages = num_pages_tbl[(addr >> 4) & 3];
291 	}
292 
293 	ei_status.name = model_name;
294 	ei_status.word16 = 1;
295 	ei_status.tx_start_page = START_PG;
296 	ei_status.rx_start_page = START_PG + TX_PAGES;
297 	ei_status.stop_page = num_pages;
298 
299 	ei_status.mem = ioremap(dev->mem_start, (ei_status.stop_page - START_PG)*256);
300 	if (!ei_status.mem) {
301 		pr_cont(", failed to ioremap.\n");
302 		retval =  -ENOMEM;
303 		goto out;
304 	}
305 
306 	dev->mem_end = dev->mem_start + (ei_status.stop_page - START_PG)*256;
307 
308 	if (piomode) {
309 		pr_cont(", %s IRQ %d programmed-I/O mode.\n",
310 			eeprom_irq ? "EEPROM" : "assigned ", dev->irq);
311 		ei_status.block_input = &ultra_pio_input;
312 		ei_status.block_output = &ultra_pio_output;
313 		ei_status.get_8390_hdr = &ultra_pio_get_hdr;
314 	} else {
315 		pr_cont(", %s IRQ %d memory %#lx-%#lx.\n",
316 			eeprom_irq ? "" : "assigned ", dev->irq, dev->mem_start,
317 			dev->mem_end-1);
318 		ei_status.block_input = &ultra_block_input;
319 		ei_status.block_output = &ultra_block_output;
320 		ei_status.get_8390_hdr = &ultra_get_8390_hdr;
321 	}
322 	ei_status.reset_8390 = &ultra_reset_8390;
323 
324 	dev->netdev_ops = &ultra_netdev_ops;
325 	NS8390_init(dev, 0);
326 	ei_local->msg_enable = ultra_msg_enable;
327 
328 	retval = register_netdev(dev);
329 	if (retval)
330 		goto out;
331 	return 0;
332 out:
333 	release_region(ioaddr, ULTRA_IO_EXTENT);
334 	return retval;
335 }
336 
337 #ifdef __ISAPNP__
338 static int __init ultra_probe_isapnp(struct net_device *dev)
339 {
340         int i;
341 
342         for (i = 0; ultra_device_ids[i].vendor != 0; i++) {
343 		struct pnp_dev *idev = NULL;
344 
345                 while ((idev = pnp_find_dev(NULL,
346                                             ultra_device_ids[i].vendor,
347                                             ultra_device_ids[i].function,
348                                             idev))) {
349                         /* Avoid already found cards from previous calls */
350                         if (pnp_device_attach(idev) < 0)
351 				continue;
352                         if (pnp_activate_dev(idev) < 0) {
353                               __again:
354 				pnp_device_detach(idev);
355 				continue;
356                         }
357 			/* if no io and irq, search for next */
358 			if (!pnp_port_valid(idev, 0) || !pnp_irq_valid(idev, 0))
359 				goto __again;
360                         /* found it */
361 			dev->base_addr = pnp_port_start(idev, 0);
362 			dev->irq = pnp_irq(idev, 0);
363 			netdev_info(dev,
364 				    "smc-ultra.c: ISAPnP reports %s at i/o %#lx, irq %d.\n",
365 				    (char *) ultra_device_ids[i].driver_data,
366 				    dev->base_addr, dev->irq);
367                         if (ultra_probe1(dev, dev->base_addr) != 0) {      /* Shouldn't happen. */
368 				netdev_err(dev,
369 					   "smc-ultra.c: Probe of ISAPnP card at %#lx failed.\n",
370 					   dev->base_addr);
371 				pnp_device_detach(idev);
372 				return -ENXIO;
373                         }
374                         ei_status.priv = (unsigned long)idev;
375                         break;
376                 }
377                 if (!idev)
378                         continue;
379                 return 0;
380         }
381 
382         return -ENODEV;
383 }
384 #endif
385 
386 static int
387 ultra_open(struct net_device *dev)
388 {
389 	int retval;
390 	int ioaddr = dev->base_addr - ULTRA_NIC_OFFSET; /* ASIC addr */
391 	unsigned char irq2reg[] = {0, 0, 0x04, 0x08, 0, 0x0C, 0, 0x40,
392 				   0, 0x04, 0x44, 0x48, 0, 0, 0, 0x4C, };
393 
394 	retval = request_irq(dev->irq, ei_interrupt, 0, dev->name, dev);
395 	if (retval)
396 		return retval;
397 
398 	outb(0x00, ioaddr);	/* Disable shared memory for safety. */
399 	outb(0x80, ioaddr + 5);
400 	/* Set the IRQ line. */
401 	outb(inb(ioaddr + 4) | 0x80, ioaddr + 4);
402 	outb((inb(ioaddr + 13) & ~0x4C) | irq2reg[dev->irq], ioaddr + 13);
403 	outb(inb(ioaddr + 4) & 0x7f, ioaddr + 4);
404 
405 	if (ei_status.block_input == &ultra_pio_input) {
406 		outb(0x11, ioaddr + 6);		/* Enable interrupts and PIO. */
407 		outb(0x01, ioaddr + 0x19);  	/* Enable ring read auto-wrap. */
408 	} else
409 		outb(0x01, ioaddr + 6);		/* Enable interrupts and memory. */
410 	/* Set the early receive warning level in window 0 high enough not
411 	   to receive ERW interrupts. */
412 	outb_p(E8390_NODMA+E8390_PAGE0, dev->base_addr);
413 	outb(0xff, dev->base_addr + EN0_ERWCNT);
414 	ei_open(dev);
415 	return 0;
416 }
417 
418 static void
419 ultra_reset_8390(struct net_device *dev)
420 {
421 	int cmd_port = dev->base_addr - ULTRA_NIC_OFFSET; /* ASIC base addr */
422 	struct ei_device *ei_local = netdev_priv(dev);
423 
424 	outb(ULTRA_RESET, cmd_port);
425 	netif_dbg(ei_local, hw, dev, "resetting Ultra, t=%ld...\n", jiffies);
426 	ei_status.txing = 0;
427 
428 	outb(0x00, cmd_port);	/* Disable shared memory for safety. */
429 	outb(0x80, cmd_port + 5);
430 	if (ei_status.block_input == &ultra_pio_input)
431 		outb(0x11, cmd_port + 6);		/* Enable interrupts and PIO. */
432 	else
433 		outb(0x01, cmd_port + 6);		/* Enable interrupts and memory. */
434 
435 	netif_dbg(ei_local, hw, dev, "reset done\n");
436 }
437 
438 /* Grab the 8390 specific header. Similar to the block_input routine, but
439    we don't need to be concerned with ring wrap as the header will be at
440    the start of a page, so we optimize accordingly. */
441 
442 static void
443 ultra_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr, int ring_page)
444 {
445 	void __iomem *hdr_start = ei_status.mem + ((ring_page - START_PG)<<8);
446 
447 	outb(ULTRA_MEMENB, dev->base_addr - ULTRA_NIC_OFFSET);	/* shmem on */
448 #ifdef __BIG_ENDIAN
449 	/* Officially this is what we are doing, but the readl() is faster */
450 	/* unfortunately it isn't endian aware of the struct               */
451 	memcpy_fromio(hdr, hdr_start, sizeof(struct e8390_pkt_hdr));
452 	hdr->count = le16_to_cpu(hdr->count);
453 #else
454 	((unsigned int*)hdr)[0] = readl(hdr_start);
455 #endif
456 	outb(0x00, dev->base_addr - ULTRA_NIC_OFFSET); /* shmem off */
457 }
458 
459 /* Block input and output are easy on shared memory ethercards, the only
460    complication is when the ring buffer wraps. */
461 
462 static void
463 ultra_block_input(struct net_device *dev, int count, struct sk_buff *skb, int ring_offset)
464 {
465 	void __iomem *xfer_start = ei_status.mem + ring_offset - (START_PG<<8);
466 
467 	/* Enable shared memory. */
468 	outb(ULTRA_MEMENB, dev->base_addr - ULTRA_NIC_OFFSET);
469 
470 	if (ring_offset + count > ei_status.stop_page*256) {
471 		/* We must wrap the input move. */
472 		int semi_count = ei_status.stop_page*256 - ring_offset;
473 		memcpy_fromio(skb->data, xfer_start, semi_count);
474 		count -= semi_count;
475 		memcpy_fromio(skb->data + semi_count, ei_status.mem + TX_PAGES * 256, count);
476 	} else {
477 		memcpy_fromio(skb->data, xfer_start, count);
478 	}
479 
480 	outb(0x00, dev->base_addr - ULTRA_NIC_OFFSET);	/* Disable memory. */
481 }
482 
483 static void
484 ultra_block_output(struct net_device *dev, int count, const unsigned char *buf,
485 				int start_page)
486 {
487 	void __iomem *shmem = ei_status.mem + ((start_page - START_PG)<<8);
488 
489 	/* Enable shared memory. */
490 	outb(ULTRA_MEMENB, dev->base_addr - ULTRA_NIC_OFFSET);
491 
492 	memcpy_toio(shmem, buf, count);
493 
494 	outb(0x00, dev->base_addr - ULTRA_NIC_OFFSET); /* Disable memory. */
495 }
496 
497 /* The identical operations for programmed I/O cards.
498    The PIO model is trivial to use: the 16 bit start address is written
499    byte-sequentially to IOPA, with no intervening I/O operations, and the
500    data is read or written to the IOPD data port.
501    The only potential complication is that the address register is shared
502    and must be always be rewritten between each read/write direction change.
503    This is no problem for us, as the 8390 code ensures that we are single
504    threaded. */
505 static void ultra_pio_get_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr,
506 						int ring_page)
507 {
508 	int ioaddr = dev->base_addr - ULTRA_NIC_OFFSET; /* ASIC addr */
509 	outb(0x00, ioaddr + IOPA);	/* Set the address, LSB first. */
510 	outb(ring_page, ioaddr + IOPA);
511 	insw(ioaddr + IOPD, hdr, sizeof(struct e8390_pkt_hdr)>>1);
512 }
513 
514 static void ultra_pio_input(struct net_device *dev, int count,
515 						  struct sk_buff *skb, int ring_offset)
516 {
517 	int ioaddr = dev->base_addr - ULTRA_NIC_OFFSET; /* ASIC addr */
518     char *buf = skb->data;
519 
520 	/* For now set the address again, although it should already be correct. */
521 	outb(ring_offset, ioaddr + IOPA);	/* Set the address, LSB first. */
522 	outb(ring_offset >> 8, ioaddr + IOPA);
523 	/* We know skbuffs are padded to at least word alignment. */
524 	insw(ioaddr + IOPD, buf, (count+1)>>1);
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 static int __init ultra_init_module(void)
576 {
577 	struct net_device *dev;
578 	int this_dev, found = 0;
579 
580 	for (this_dev = 0; this_dev < MAX_ULTRA_CARDS; this_dev++) {
581 		if (io[this_dev] == 0)  {
582 			if (this_dev != 0) break; /* only autoprobe 1st one */
583 			printk(KERN_NOTICE "smc-ultra.c: Presently autoprobing (not recommended) for a single card.\n");
584 		}
585 		dev = alloc_ei_netdev();
586 		if (!dev)
587 			break;
588 		dev->irq = irq[this_dev];
589 		dev->base_addr = io[this_dev];
590 		if (do_ultra_probe(dev) == 0) {
591 			dev_ultra[found++] = dev;
592 			continue;
593 		}
594 		free_netdev(dev);
595 		printk(KERN_WARNING "smc-ultra.c: No SMC Ultra card found (i/o = 0x%x).\n", io[this_dev]);
596 		break;
597 	}
598 	if (found)
599 		return 0;
600 	return -ENXIO;
601 }
602 module_init(ultra_init_module);
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 static void __exit ultra_cleanup_module(void)
617 {
618 	int this_dev;
619 
620 	for (this_dev = 0; this_dev < MAX_ULTRA_CARDS; this_dev++) {
621 		struct net_device *dev = dev_ultra[this_dev];
622 		if (dev) {
623 			unregister_netdev(dev);
624 			cleanup_card(dev);
625 			free_netdev(dev);
626 		}
627 	}
628 }
629 module_exit(ultra_cleanup_module);
630 #endif /* MODULE */
631