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 #include <net/Space.h>
70 
71 #include <asm/io.h>
72 #include <asm/irq.h>
73 
74 #include "8390.h"
75 
76 #define DRV_NAME "smc-ultra"
77 
78 /* A zero-terminated list of I/O addresses to be probed. */
79 static unsigned int ultra_portlist[] __initdata =
80 {0x200, 0x220, 0x240, 0x280, 0x300, 0x340, 0x380, 0};
81 
82 static int ultra_probe1(struct net_device *dev, int ioaddr);
83 
84 #ifdef __ISAPNP__
85 static int ultra_probe_isapnp(struct net_device *dev);
86 #endif
87 
88 static int ultra_open(struct net_device *dev);
89 static void ultra_reset_8390(struct net_device *dev);
90 static void ultra_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr,
91 						int ring_page);
92 static void ultra_block_input(struct net_device *dev, int count,
93 						  struct sk_buff *skb, int ring_offset);
94 static void ultra_block_output(struct net_device *dev, int count,
95 							const unsigned char *buf, const int start_page);
96 static void ultra_pio_get_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr,
97 						int ring_page);
98 static void ultra_pio_input(struct net_device *dev, int count,
99 						  struct sk_buff *skb, int ring_offset);
100 static void ultra_pio_output(struct net_device *dev, int count,
101 							 const unsigned char *buf, const int start_page);
102 static int ultra_close_card(struct net_device *dev);
103 
104 #ifdef __ISAPNP__
105 static struct isapnp_device_id ultra_device_ids[] __initdata = {
106         {       ISAPNP_VENDOR('S','M','C'), ISAPNP_FUNCTION(0x8416),
107                 ISAPNP_VENDOR('S','M','C'), ISAPNP_FUNCTION(0x8416),
108                 (long) "SMC EtherEZ (8416)" },
109         { }	/* terminate list */
110 };
111 
112 MODULE_DEVICE_TABLE(isapnp, ultra_device_ids);
113 #endif
114 
115 static u32 ultra_msg_enable;
116 
117 #define START_PG		0x00	/* First page of TX buffer */
118 
119 #define ULTRA_CMDREG	0		/* Offset to ASIC command register. */
120 #define	 ULTRA_RESET	0x80	/* Board reset, in ULTRA_CMDREG. */
121 #define	 ULTRA_MEMENB	0x40	/* Enable the shared memory. */
122 #define IOPD	0x02			/* I/O Pipe Data (16 bits), PIO operation. */
123 #define IOPA	0x07			/* I/O Pipe Address for PIO operation. */
124 #define ULTRA_NIC_OFFSET  16	/* NIC register offset from the base_addr. */
125 #define ULTRA_IO_EXTENT 32
126 #define EN0_ERWCNT		0x08	/* Early receive warning count. */
127 
128 #ifdef CONFIG_NET_POLL_CONTROLLER
129 static void ultra_poll(struct net_device *dev)
130 {
131 	disable_irq(dev->irq);
132 	ei_interrupt(dev->irq, dev);
133 	enable_irq(dev->irq);
134 }
135 #endif
136 /*	Probe for the Ultra.  This looks like a 8013 with the station
137 	address PROM at I/O ports <base>+8 to <base>+13, with a checksum
138 	following.
139 */
140 
141 static int __init do_ultra_probe(struct net_device *dev)
142 {
143 	int i;
144 	int base_addr = dev->base_addr;
145 	int irq = dev->irq;
146 
147 	if (base_addr > 0x1ff)		/* Check a single specified location. */
148 		return ultra_probe1(dev, base_addr);
149 	else if (base_addr != 0)	/* Don't probe at all. */
150 		return -ENXIO;
151 
152 #ifdef __ISAPNP__
153 	/* Look for any installed ISAPnP cards */
154 	if (isapnp_present() && (ultra_probe_isapnp(dev) == 0))
155 		return 0;
156 #endif
157 
158 	for (i = 0; ultra_portlist[i]; i++) {
159 		dev->irq = irq;
160 		if (ultra_probe1(dev, ultra_portlist[i]) == 0)
161 			return 0;
162 	}
163 
164 	return -ENODEV;
165 }
166 
167 #ifndef MODULE
168 struct net_device * __init ultra_probe(int unit)
169 {
170 	struct net_device *dev = alloc_ei_netdev();
171 	int err;
172 
173 	if (!dev)
174 		return ERR_PTR(-ENOMEM);
175 
176 	sprintf(dev->name, "eth%d", unit);
177 	netdev_boot_setup_check(dev);
178 
179 	err = do_ultra_probe(dev);
180 	if (err)
181 		goto out;
182 	return dev;
183 out:
184 	free_netdev(dev);
185 	return ERR_PTR(err);
186 }
187 #endif
188 
189 static const struct net_device_ops ultra_netdev_ops = {
190 	.ndo_open		= ultra_open,
191 	.ndo_stop		= ultra_close_card,
192 
193 	.ndo_start_xmit		= ei_start_xmit,
194 	.ndo_tx_timeout		= ei_tx_timeout,
195 	.ndo_get_stats		= ei_get_stats,
196 	.ndo_set_rx_mode	= ei_set_multicast_list,
197 	.ndo_validate_addr	= eth_validate_addr,
198 	.ndo_set_mac_address 	= eth_mac_addr,
199 #ifdef CONFIG_NET_POLL_CONTROLLER
200 	.ndo_poll_controller 	= ultra_poll,
201 #endif
202 };
203 
204 static int __init ultra_probe1(struct net_device *dev, int ioaddr)
205 {
206 	int i, retval;
207 	int checksum = 0;
208 	u8 macaddr[ETH_ALEN];
209 	const char *model_name;
210 	unsigned char eeprom_irq = 0;
211 	static unsigned version_printed;
212 	/* Values from various config regs. */
213 	unsigned char num_pages, irqreg, addr, piomode;
214 	unsigned char idreg = inb(ioaddr + 7);
215 	unsigned char reg4 = inb(ioaddr + 4) & 0x7f;
216 	struct ei_device *ei_local = netdev_priv(dev);
217 
218 	if (!request_region(ioaddr, ULTRA_IO_EXTENT, DRV_NAME))
219 		return -EBUSY;
220 
221 	/* Check the ID nibble. */
222 	if ((idreg & 0xF0) != 0x20 			/* SMC Ultra */
223 		&& (idreg & 0xF0) != 0x40) {		/* SMC EtherEZ */
224 		retval = -ENODEV;
225 		goto out;
226 	}
227 
228 	/* Select the station address register set. */
229 	outb(reg4, ioaddr + 4);
230 
231 	for (i = 0; i < 8; i++)
232 		checksum += inb(ioaddr + 8 + i);
233 	if ((checksum & 0xff) != 0xFF) {
234 		retval = -ENODEV;
235 		goto out;
236 	}
237 
238 	if ((ultra_msg_enable & NETIF_MSG_DRV) && (version_printed++ == 0))
239 		netdev_info(dev, version);
240 
241 	model_name = (idreg & 0xF0) == 0x20 ? "SMC Ultra" : "SMC EtherEZ";
242 
243 	for (i = 0; i < 6; i++)
244 		macaddr[i] = inb(ioaddr + 8 + i);
245 	eth_hw_addr_set(dev, macaddr);
246 
247 	netdev_info(dev, "%s at %#3x, %pM", model_name,
248 		    ioaddr, dev->dev_addr);
249 
250 	/* Switch from the station address to the alternate register set and
251 	   read the useful registers there. */
252 	outb(0x80 | reg4, ioaddr + 4);
253 
254 	/* Enabled FINE16 mode to avoid BIOS ROM width mismatches @ reboot. */
255 	outb(0x80 | inb(ioaddr + 0x0c), ioaddr + 0x0c);
256 	piomode = inb(ioaddr + 0x8);
257 	addr = inb(ioaddr + 0xb);
258 	irqreg = inb(ioaddr + 0xd);
259 
260 	/* Switch back to the station address register set so that the MS-DOS driver
261 	   can find the card after a warm boot. */
262 	outb(reg4, ioaddr + 4);
263 
264 	if (dev->irq < 2) {
265 		unsigned char irqmap[] = {0, 9, 3, 5, 7, 10, 11, 15};
266 		int irq;
267 
268 		/* The IRQ bits are split. */
269 		irq = irqmap[((irqreg & 0x40) >> 4) + ((irqreg & 0x0c) >> 2)];
270 
271 		if (irq == 0) {
272 			pr_cont(", failed to detect IRQ line.\n");
273 			retval =  -EAGAIN;
274 			goto out;
275 		}
276 		dev->irq = irq;
277 		eeprom_irq = 1;
278 	}
279 
280 	/* The 8390 isn't at the base address, so fake the offset */
281 	dev->base_addr = ioaddr+ULTRA_NIC_OFFSET;
282 
283 	{
284 		static const int addr_tbl[4] = {
285 			0x0C0000, 0x0E0000, 0xFC0000, 0xFE0000
286 		};
287 		static const short num_pages_tbl[4] = {
288 			0x20, 0x40, 0x80, 0xff
289 		};
290 
291 		dev->mem_start = ((addr & 0x0f) << 13) + addr_tbl[(addr >> 6) & 3] ;
292 		num_pages = num_pages_tbl[(addr >> 4) & 3];
293 	}
294 
295 	ei_status.name = model_name;
296 	ei_status.word16 = 1;
297 	ei_status.tx_start_page = START_PG;
298 	ei_status.rx_start_page = START_PG + TX_PAGES;
299 	ei_status.stop_page = num_pages;
300 
301 	ei_status.mem = ioremap(dev->mem_start, (ei_status.stop_page - START_PG)*256);
302 	if (!ei_status.mem) {
303 		pr_cont(", failed to ioremap.\n");
304 		retval =  -ENOMEM;
305 		goto out;
306 	}
307 
308 	dev->mem_end = dev->mem_start + (ei_status.stop_page - START_PG)*256;
309 
310 	if (piomode) {
311 		pr_cont(", %s IRQ %d programmed-I/O mode.\n",
312 			eeprom_irq ? "EEPROM" : "assigned ", dev->irq);
313 		ei_status.block_input = &ultra_pio_input;
314 		ei_status.block_output = &ultra_pio_output;
315 		ei_status.get_8390_hdr = &ultra_pio_get_hdr;
316 	} else {
317 		pr_cont(", %s IRQ %d memory %#lx-%#lx.\n",
318 			eeprom_irq ? "" : "assigned ", dev->irq, dev->mem_start,
319 			dev->mem_end-1);
320 		ei_status.block_input = &ultra_block_input;
321 		ei_status.block_output = &ultra_block_output;
322 		ei_status.get_8390_hdr = &ultra_get_8390_hdr;
323 	}
324 	ei_status.reset_8390 = &ultra_reset_8390;
325 
326 	dev->netdev_ops = &ultra_netdev_ops;
327 	NS8390_init(dev, 0);
328 	ei_local->msg_enable = ultra_msg_enable;
329 
330 	retval = register_netdev(dev);
331 	if (retval)
332 		goto out;
333 	return 0;
334 out:
335 	release_region(ioaddr, ULTRA_IO_EXTENT);
336 	return retval;
337 }
338 
339 #ifdef __ISAPNP__
340 static int __init ultra_probe_isapnp(struct net_device *dev)
341 {
342         int i;
343 
344         for (i = 0; ultra_device_ids[i].vendor != 0; i++) {
345 		struct pnp_dev *idev = NULL;
346 
347                 while ((idev = pnp_find_dev(NULL,
348                                             ultra_device_ids[i].vendor,
349                                             ultra_device_ids[i].function,
350                                             idev))) {
351                         /* Avoid already found cards from previous calls */
352                         if (pnp_device_attach(idev) < 0)
353 				continue;
354                         if (pnp_activate_dev(idev) < 0) {
355                               __again:
356 				pnp_device_detach(idev);
357 				continue;
358                         }
359 			/* if no io and irq, search for next */
360 			if (!pnp_port_valid(idev, 0) || !pnp_irq_valid(idev, 0))
361 				goto __again;
362                         /* found it */
363 			dev->base_addr = pnp_port_start(idev, 0);
364 			dev->irq = pnp_irq(idev, 0);
365 			netdev_info(dev,
366 				    "smc-ultra.c: ISAPnP reports %s at i/o %#lx, irq %d.\n",
367 				    (char *) ultra_device_ids[i].driver_data,
368 				    dev->base_addr, dev->irq);
369                         if (ultra_probe1(dev, dev->base_addr) != 0) {      /* Shouldn't happen. */
370 				netdev_err(dev,
371 					   "smc-ultra.c: Probe of ISAPnP card at %#lx failed.\n",
372 					   dev->base_addr);
373 				pnp_device_detach(idev);
374 				return -ENXIO;
375                         }
376                         ei_status.priv = (unsigned long)idev;
377                         break;
378                 }
379                 if (!idev)
380                         continue;
381                 return 0;
382         }
383 
384         return -ENODEV;
385 }
386 #endif
387 
388 static int
389 ultra_open(struct net_device *dev)
390 {
391 	int retval;
392 	int ioaddr = dev->base_addr - ULTRA_NIC_OFFSET; /* ASIC addr */
393 	unsigned char irq2reg[] = {0, 0, 0x04, 0x08, 0, 0x0C, 0, 0x40,
394 				   0, 0x04, 0x44, 0x48, 0, 0, 0, 0x4C, };
395 
396 	retval = request_irq(dev->irq, ei_interrupt, 0, dev->name, dev);
397 	if (retval)
398 		return retval;
399 
400 	outb(0x00, ioaddr);	/* Disable shared memory for safety. */
401 	outb(0x80, ioaddr + 5);
402 	/* Set the IRQ line. */
403 	outb(inb(ioaddr + 4) | 0x80, ioaddr + 4);
404 	outb((inb(ioaddr + 13) & ~0x4C) | irq2reg[dev->irq], ioaddr + 13);
405 	outb(inb(ioaddr + 4) & 0x7f, ioaddr + 4);
406 
407 	if (ei_status.block_input == &ultra_pio_input) {
408 		outb(0x11, ioaddr + 6);		/* Enable interrupts and PIO. */
409 		outb(0x01, ioaddr + 0x19);  	/* Enable ring read auto-wrap. */
410 	} else
411 		outb(0x01, ioaddr + 6);		/* Enable interrupts and memory. */
412 	/* Set the early receive warning level in window 0 high enough not
413 	   to receive ERW interrupts. */
414 	outb_p(E8390_NODMA+E8390_PAGE0, dev->base_addr);
415 	outb(0xff, dev->base_addr + EN0_ERWCNT);
416 	ei_open(dev);
417 	return 0;
418 }
419 
420 static void
421 ultra_reset_8390(struct net_device *dev)
422 {
423 	int cmd_port = dev->base_addr - ULTRA_NIC_OFFSET; /* ASIC base addr */
424 	struct ei_device *ei_local = netdev_priv(dev);
425 
426 	outb(ULTRA_RESET, cmd_port);
427 	netif_dbg(ei_local, hw, dev, "resetting Ultra, t=%ld...\n", jiffies);
428 	ei_status.txing = 0;
429 
430 	outb(0x00, cmd_port);	/* Disable shared memory for safety. */
431 	outb(0x80, cmd_port + 5);
432 	if (ei_status.block_input == &ultra_pio_input)
433 		outb(0x11, cmd_port + 6);		/* Enable interrupts and PIO. */
434 	else
435 		outb(0x01, cmd_port + 6);		/* Enable interrupts and memory. */
436 
437 	netif_dbg(ei_local, hw, dev, "reset done\n");
438 }
439 
440 /* Grab the 8390 specific header. Similar to the block_input routine, but
441    we don't need to be concerned with ring wrap as the header will be at
442    the start of a page, so we optimize accordingly. */
443 
444 static void
445 ultra_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr, int ring_page)
446 {
447 	void __iomem *hdr_start = ei_status.mem + ((ring_page - START_PG)<<8);
448 
449 	outb(ULTRA_MEMENB, dev->base_addr - ULTRA_NIC_OFFSET);	/* shmem on */
450 #ifdef __BIG_ENDIAN
451 	/* Officially this is what we are doing, but the readl() is faster */
452 	/* unfortunately it isn't endian aware of the struct               */
453 	memcpy_fromio(hdr, hdr_start, sizeof(struct e8390_pkt_hdr));
454 	hdr->count = le16_to_cpu(hdr->count);
455 #else
456 	((unsigned int*)hdr)[0] = readl(hdr_start);
457 #endif
458 	outb(0x00, dev->base_addr - ULTRA_NIC_OFFSET); /* shmem off */
459 }
460 
461 /* Block input and output are easy on shared memory ethercards, the only
462    complication is when the ring buffer wraps. */
463 
464 static void
465 ultra_block_input(struct net_device *dev, int count, struct sk_buff *skb, int ring_offset)
466 {
467 	void __iomem *xfer_start = ei_status.mem + ring_offset - (START_PG<<8);
468 
469 	/* Enable shared memory. */
470 	outb(ULTRA_MEMENB, dev->base_addr - ULTRA_NIC_OFFSET);
471 
472 	if (ring_offset + count > ei_status.stop_page*256) {
473 		/* We must wrap the input move. */
474 		int semi_count = ei_status.stop_page*256 - ring_offset;
475 		memcpy_fromio(skb->data, xfer_start, semi_count);
476 		count -= semi_count;
477 		memcpy_fromio(skb->data + semi_count, ei_status.mem + TX_PAGES * 256, count);
478 	} else {
479 		memcpy_fromio(skb->data, xfer_start, count);
480 	}
481 
482 	outb(0x00, dev->base_addr - ULTRA_NIC_OFFSET);	/* Disable memory. */
483 }
484 
485 static void
486 ultra_block_output(struct net_device *dev, int count, const unsigned char *buf,
487 				int start_page)
488 {
489 	void __iomem *shmem = ei_status.mem + ((start_page - START_PG)<<8);
490 
491 	/* Enable shared memory. */
492 	outb(ULTRA_MEMENB, dev->base_addr - ULTRA_NIC_OFFSET);
493 
494 	memcpy_toio(shmem, buf, count);
495 
496 	outb(0x00, dev->base_addr - ULTRA_NIC_OFFSET); /* Disable memory. */
497 }
498 
499 /* The identical operations for programmed I/O cards.
500    The PIO model is trivial to use: the 16 bit start address is written
501    byte-sequentially to IOPA, with no intervening I/O operations, and the
502    data is read or written to the IOPD data port.
503    The only potential complication is that the address register is shared
504    and must be always be rewritten between each read/write direction change.
505    This is no problem for us, as the 8390 code ensures that we are single
506    threaded. */
507 static void ultra_pio_get_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr,
508 						int ring_page)
509 {
510 	int ioaddr = dev->base_addr - ULTRA_NIC_OFFSET; /* ASIC addr */
511 	outb(0x00, ioaddr + IOPA);	/* Set the address, LSB first. */
512 	outb(ring_page, ioaddr + IOPA);
513 	insw(ioaddr + IOPD, hdr, sizeof(struct e8390_pkt_hdr)>>1);
514 }
515 
516 static void ultra_pio_input(struct net_device *dev, int count,
517 						  struct sk_buff *skb, int ring_offset)
518 {
519 	int ioaddr = dev->base_addr - ULTRA_NIC_OFFSET; /* ASIC addr */
520     char *buf = skb->data;
521 
522 	/* For now set the address again, although it should already be correct. */
523 	outb(ring_offset, ioaddr + IOPA);	/* Set the address, LSB first. */
524 	outb(ring_offset >> 8, ioaddr + IOPA);
525 	/* We know skbuffs are padded to at least word alignment. */
526 	insw(ioaddr + IOPD, buf, (count+1)>>1);
527 }
528 static void ultra_pio_output(struct net_device *dev, int count,
529 							const unsigned char *buf, const int start_page)
530 {
531 	int ioaddr = dev->base_addr - ULTRA_NIC_OFFSET; /* ASIC addr */
532 	outb(0x00, ioaddr + IOPA);	/* Set the address, LSB first. */
533 	outb(start_page, ioaddr + IOPA);
534 	/* An extra odd byte is OK here as well. */
535 	outsw(ioaddr + IOPD, buf, (count+1)>>1);
536 }
537 
538 static int
539 ultra_close_card(struct net_device *dev)
540 {
541 	int ioaddr = dev->base_addr - ULTRA_NIC_OFFSET; /* CMDREG */
542 	struct ei_device *ei_local = netdev_priv(dev);
543 
544 	netif_stop_queue(dev);
545 
546 	netif_dbg(ei_local, ifdown, dev, "Shutting down ethercard.\n");
547 
548 	outb(0x00, ioaddr + 6);		/* Disable interrupts. */
549 	free_irq(dev->irq, dev);
550 
551 	NS8390_init(dev, 0);
552 
553 	/* We should someday disable shared memory and change to 8-bit mode
554 	   "just in case"... */
555 
556 	return 0;
557 }
558 
559 
560 #ifdef MODULE
561 #define MAX_ULTRA_CARDS	4	/* Max number of Ultra cards per module */
562 static struct net_device *dev_ultra[MAX_ULTRA_CARDS];
563 static int io[MAX_ULTRA_CARDS];
564 static int irq[MAX_ULTRA_CARDS];
565 
566 module_param_hw_array(io, int, ioport, NULL, 0);
567 module_param_hw_array(irq, int, irq, NULL, 0);
568 module_param_named(msg_enable, ultra_msg_enable, uint, 0444);
569 MODULE_PARM_DESC(io, "I/O base address(es)");
570 MODULE_PARM_DESC(irq, "IRQ number(s) (assigned)");
571 MODULE_PARM_DESC(msg_enable, "Debug message level (see linux/netdevice.h for bitmap)");
572 MODULE_DESCRIPTION("SMC Ultra/EtherEZ ISA/PnP Ethernet driver");
573 MODULE_LICENSE("GPL");
574 
575 /* This is set up so that only a single autoprobe takes place per call.
576 ISA device autoprobes on a running machine are not recommended. */
577 static int __init ultra_init_module(void)
578 {
579 	struct net_device *dev;
580 	int this_dev, found = 0;
581 
582 	for (this_dev = 0; this_dev < MAX_ULTRA_CARDS; this_dev++) {
583 		if (io[this_dev] == 0)  {
584 			if (this_dev != 0) break; /* only autoprobe 1st one */
585 			printk(KERN_NOTICE "smc-ultra.c: Presently autoprobing (not recommended) for a single card.\n");
586 		}
587 		dev = alloc_ei_netdev();
588 		if (!dev)
589 			break;
590 		dev->irq = irq[this_dev];
591 		dev->base_addr = io[this_dev];
592 		if (do_ultra_probe(dev) == 0) {
593 			dev_ultra[found++] = dev;
594 			continue;
595 		}
596 		free_netdev(dev);
597 		printk(KERN_WARNING "smc-ultra.c: No SMC Ultra card found (i/o = 0x%x).\n", io[this_dev]);
598 		break;
599 	}
600 	if (found)
601 		return 0;
602 	return -ENXIO;
603 }
604 module_init(ultra_init_module);
605 
606 static void cleanup_card(struct net_device *dev)
607 {
608 	/* NB: ultra_close_card() does free_irq */
609 #ifdef __ISAPNP__
610 	struct pnp_dev *idev = (struct pnp_dev *)ei_status.priv;
611 	if (idev)
612 		pnp_device_detach(idev);
613 #endif
614 	release_region(dev->base_addr - ULTRA_NIC_OFFSET, ULTRA_IO_EXTENT);
615 	iounmap(ei_status.mem);
616 }
617 
618 static void __exit ultra_cleanup_module(void)
619 {
620 	int this_dev;
621 
622 	for (this_dev = 0; this_dev < MAX_ULTRA_CARDS; this_dev++) {
623 		struct net_device *dev = dev_ultra[this_dev];
624 		if (dev) {
625 			unregister_netdev(dev);
626 			cleanup_card(dev);
627 			free_netdev(dev);
628 		}
629 	}
630 }
631 module_exit(ultra_cleanup_module);
632 #endif /* MODULE */
633