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1da177e4 LT |
1 | /* isa-skeleton.c: A network driver outline for linux. |
2 | * | |
3 | * Written 1993-94 by Donald Becker. | |
4 | * | |
5 | * Copyright 1993 United States Government as represented by the | |
6 | * Director, National Security Agency. | |
7 | * | |
8 | * This software may be used and distributed according to the terms | |
9 | * of the GNU General Public License, incorporated herein by reference. | |
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 file is an outline for writing a network device driver for the | |
17 | * the Linux operating system. | |
18 | * | |
19 | * To write (or understand) a driver, have a look at the "loopback.c" file to | |
20 | * get a feel of what is going on, and then use the code below as a skeleton | |
21 | * for the new driver. | |
22 | * | |
23 | */ | |
24 | ||
25 | static const char *version = | |
26 | "isa-skeleton.c:v1.51 9/24/94 Donald Becker (becker@cesdis.gsfc.nasa.gov)\n"; | |
27 | ||
28 | /* | |
29 | * Sources: | |
30 | * List your sources of programming information to document that | |
31 | * the driver is your own creation, and give due credit to others | |
32 | * that contributed to the work. Remember that GNU project code | |
33 | * cannot use proprietary or trade secret information. Interface | |
34 | * definitions are generally considered non-copyrightable to the | |
35 | * extent that the same names and structures must be used to be | |
36 | * compatible. | |
37 | * | |
38 | * Finally, keep in mind that the Linux kernel is has an API, not | |
39 | * ABI. Proprietary object-code-only distributions are not permitted | |
40 | * under the GPL. | |
41 | */ | |
42 | ||
43 | #include <linux/module.h> | |
44 | #include <linux/kernel.h> | |
45 | #include <linux/types.h> | |
46 | #include <linux/fcntl.h> | |
47 | #include <linux/interrupt.h> | |
48 | #include <linux/ioport.h> | |
49 | #include <linux/in.h> | |
50 | #include <linux/slab.h> | |
51 | #include <linux/string.h> | |
52 | #include <linux/spinlock.h> | |
53 | #include <linux/errno.h> | |
54 | #include <linux/init.h> | |
55 | #include <linux/netdevice.h> | |
56 | #include <linux/etherdevice.h> | |
57 | #include <linux/skbuff.h> | |
58 | #include <linux/bitops.h> | |
59 | ||
60 | #include <asm/system.h> | |
61 | #include <asm/io.h> | |
62 | #include <asm/dma.h> | |
63 | ||
64 | /* | |
65 | * The name of the card. Is used for messages and in the requests for | |
66 | * io regions, irqs and dma channels | |
67 | */ | |
68 | static const char* cardname = "netcard"; | |
69 | ||
70 | /* First, a few definitions that the brave might change. */ | |
71 | ||
72 | /* A zero-terminated list of I/O addresses to be probed. */ | |
73 | static unsigned int netcard_portlist[] __initdata = | |
74 | { 0x200, 0x240, 0x280, 0x2C0, 0x300, 0x320, 0x340, 0}; | |
75 | ||
76 | /* use 0 for production, 1 for verification, >2 for debug */ | |
77 | #ifndef NET_DEBUG | |
78 | #define NET_DEBUG 2 | |
79 | #endif | |
80 | static unsigned int net_debug = NET_DEBUG; | |
81 | ||
82 | /* The number of low I/O ports used by the ethercard. */ | |
83 | #define NETCARD_IO_EXTENT 32 | |
84 | ||
85 | #define MY_TX_TIMEOUT ((400*HZ)/1000) | |
86 | ||
87 | /* Information that need to be kept for each board. */ | |
88 | struct net_local { | |
89 | struct net_device_stats stats; | |
90 | long open_time; /* Useless example local info. */ | |
91 | ||
92 | /* Tx control lock. This protects the transmit buffer ring | |
93 | * state along with the "tx full" state of the driver. This | |
94 | * means all netif_queue flow control actions are protected | |
95 | * by this lock as well. | |
96 | */ | |
97 | spinlock_t lock; | |
98 | }; | |
99 | ||
100 | /* The station (ethernet) address prefix, used for IDing the board. */ | |
101 | #define SA_ADDR0 0x00 | |
102 | #define SA_ADDR1 0x42 | |
103 | #define SA_ADDR2 0x65 | |
104 | ||
105 | /* Index to functions, as function prototypes. */ | |
106 | ||
107 | static int netcard_probe1(struct net_device *dev, int ioaddr); | |
108 | static int net_open(struct net_device *dev); | |
109 | static int net_send_packet(struct sk_buff *skb, struct net_device *dev); | |
7d12e780 | 110 | static irqreturn_t net_interrupt(int irq, void *dev_id); |
1da177e4 LT |
111 | static void net_rx(struct net_device *dev); |
112 | static int net_close(struct net_device *dev); | |
113 | static struct net_device_stats *net_get_stats(struct net_device *dev); | |
114 | static void set_multicast_list(struct net_device *dev); | |
115 | static void net_tx_timeout(struct net_device *dev); | |
116 | ||
117 | ||
118 | /* Example routines you must write ;->. */ | |
119 | #define tx_done(dev) 1 | |
120 | static void hardware_send_packet(short ioaddr, char *buf, int length); | |
121 | static void chipset_init(struct net_device *dev, int startp); | |
122 | ||
123 | /* | |
124 | * Check for a network adaptor of this type, and return '0' iff one exists. | |
125 | * If dev->base_addr == 0, probe all likely locations. | |
126 | * If dev->base_addr == 1, always return failure. | |
127 | * If dev->base_addr == 2, allocate space for the device and return success | |
128 | * (detachable devices only). | |
129 | */ | |
130 | static int __init do_netcard_probe(struct net_device *dev) | |
131 | { | |
132 | int i; | |
133 | int base_addr = dev->base_addr; | |
134 | int irq = dev->irq; | |
135 | ||
1da177e4 LT |
136 | if (base_addr > 0x1ff) /* Check a single specified location. */ |
137 | return netcard_probe1(dev, base_addr); | |
138 | else if (base_addr != 0) /* Don't probe at all. */ | |
139 | return -ENXIO; | |
140 | ||
141 | for (i = 0; netcard_portlist[i]; i++) { | |
142 | int ioaddr = netcard_portlist[i]; | |
143 | if (netcard_probe1(dev, ioaddr) == 0) | |
144 | return 0; | |
145 | dev->irq = irq; | |
146 | } | |
147 | ||
148 | return -ENODEV; | |
149 | } | |
6aa20a22 | 150 | |
1da177e4 LT |
151 | static void cleanup_card(struct net_device *dev) |
152 | { | |
153 | #ifdef jumpered_dma | |
154 | free_dma(dev->dma); | |
155 | #endif | |
156 | #ifdef jumpered_interrupts | |
157 | free_irq(dev->irq, dev); | |
158 | #endif | |
159 | release_region(dev->base_addr, NETCARD_IO_EXTENT); | |
160 | } | |
161 | ||
162 | #ifndef MODULE | |
163 | struct net_device * __init netcard_probe(int unit) | |
164 | { | |
165 | struct net_device *dev = alloc_etherdev(sizeof(struct net_local)); | |
166 | int err; | |
167 | ||
168 | if (!dev) | |
169 | return ERR_PTR(-ENOMEM); | |
170 | ||
171 | sprintf(dev->name, "eth%d", unit); | |
172 | netdev_boot_setup_check(dev); | |
173 | ||
174 | err = do_netcard_probe(dev); | |
175 | if (err) | |
176 | goto out; | |
1da177e4 | 177 | return dev; |
1da177e4 LT |
178 | out: |
179 | free_netdev(dev); | |
180 | return ERR_PTR(err); | |
181 | } | |
182 | #endif | |
183 | ||
184 | /* | |
185 | * This is the real probe routine. Linux has a history of friendly device | |
186 | * probes on the ISA bus. A good device probes avoids doing writes, and | |
187 | * verifies that the correct device exists and functions. | |
188 | */ | |
189 | static int __init netcard_probe1(struct net_device *dev, int ioaddr) | |
190 | { | |
191 | struct net_local *np; | |
192 | static unsigned version_printed; | |
193 | int i; | |
194 | int err = -ENODEV; | |
195 | ||
196 | /* Grab the region so that no one else tries to probe our ioports. */ | |
197 | if (!request_region(ioaddr, NETCARD_IO_EXTENT, cardname)) | |
198 | return -EBUSY; | |
199 | ||
200 | /* | |
6aa20a22 | 201 | * For ethernet adaptors the first three octets of the station address |
1da177e4 LT |
202 | * contains the manufacturer's unique code. That might be a good probe |
203 | * method. Ideally you would add additional checks. | |
6aa20a22 | 204 | */ |
1da177e4 LT |
205 | if (inb(ioaddr + 0) != SA_ADDR0 |
206 | || inb(ioaddr + 1) != SA_ADDR1 | |
207 | || inb(ioaddr + 2) != SA_ADDR2) | |
208 | goto out; | |
209 | ||
210 | if (net_debug && version_printed++ == 0) | |
211 | printk(KERN_DEBUG "%s", version); | |
212 | ||
213 | printk(KERN_INFO "%s: %s found at %#3x, ", dev->name, cardname, ioaddr); | |
214 | ||
215 | /* Fill in the 'dev' fields. */ | |
216 | dev->base_addr = ioaddr; | |
217 | ||
218 | /* Retrieve and print the ethernet address. */ | |
219 | for (i = 0; i < 6; i++) | |
0795af57 JP |
220 | dev->dev_addr[i] = inb(ioaddr + i); |
221 | ||
e174961c | 222 | printk("%pM", dev->dev_addr); |
1da177e4 LT |
223 | |
224 | err = -EAGAIN; | |
225 | #ifdef jumpered_interrupts | |
226 | /* | |
227 | * If this board has jumpered interrupts, allocate the interrupt | |
228 | * vector now. There is no point in waiting since no other device | |
229 | * can use the interrupt, and this marks the irq as busy. Jumpered | |
230 | * interrupts are typically not reported by the boards, and we must | |
231 | * used autoIRQ to find them. | |
232 | */ | |
233 | ||
234 | if (dev->irq == -1) | |
235 | ; /* Do nothing: a user-level program will set it. */ | |
236 | else if (dev->irq < 2) { /* "Auto-IRQ" */ | |
237 | unsigned long irq_mask = probe_irq_on(); | |
238 | /* Trigger an interrupt here. */ | |
239 | ||
240 | dev->irq = probe_irq_off(irq_mask); | |
241 | if (net_debug >= 2) | |
242 | printk(" autoirq is %d", dev->irq); | |
243 | } else if (dev->irq == 2) | |
244 | /* | |
245 | * Fixup for users that don't know that IRQ 2 is really | |
246 | * IRQ9, or don't know which one to set. | |
247 | */ | |
248 | dev->irq = 9; | |
249 | ||
250 | { | |
251 | int irqval = request_irq(dev->irq, &net_interrupt, 0, cardname, dev); | |
252 | if (irqval) { | |
253 | printk("%s: unable to get IRQ %d (irqval=%d).\n", | |
254 | dev->name, dev->irq, irqval); | |
255 | goto out; | |
256 | } | |
257 | } | |
258 | #endif /* jumpered interrupt */ | |
259 | #ifdef jumpered_dma | |
260 | /* | |
261 | * If we use a jumpered DMA channel, that should be probed for and | |
262 | * allocated here as well. See lance.c for an example. | |
263 | */ | |
264 | if (dev->dma == 0) { | |
265 | if (request_dma(dev->dma, cardname)) { | |
266 | printk("DMA %d allocation failed.\n", dev->dma); | |
267 | goto out1; | |
268 | } else | |
269 | printk(", assigned DMA %d.\n", dev->dma); | |
270 | } else { | |
271 | short dma_status, new_dma_status; | |
272 | ||
273 | /* Read the DMA channel status registers. */ | |
274 | dma_status = ((inb(DMA1_STAT_REG) >> 4) & 0x0f) | | |
275 | (inb(DMA2_STAT_REG) & 0xf0); | |
276 | /* Trigger a DMA request, perhaps pause a bit. */ | |
277 | outw(0x1234, ioaddr + 8); | |
278 | /* Re-read the DMA status registers. */ | |
279 | new_dma_status = ((inb(DMA1_STAT_REG) >> 4) & 0x0f) | | |
280 | (inb(DMA2_STAT_REG) & 0xf0); | |
281 | /* | |
282 | * Eliminate the old and floating requests, | |
283 | * and DMA4 the cascade. | |
284 | */ | |
285 | new_dma_status ^= dma_status; | |
286 | new_dma_status &= ~0x10; | |
287 | for (i = 7; i > 0; i--) | |
288 | if (test_bit(i, &new_dma_status)) { | |
289 | dev->dma = i; | |
290 | break; | |
291 | } | |
292 | if (i <= 0) { | |
293 | printk("DMA probe failed.\n"); | |
294 | goto out1; | |
6aa20a22 | 295 | } |
1da177e4 LT |
296 | if (request_dma(dev->dma, cardname)) { |
297 | printk("probed DMA %d allocation failed.\n", dev->dma); | |
298 | goto out1; | |
299 | } | |
300 | } | |
301 | #endif /* jumpered DMA */ | |
302 | ||
303 | np = netdev_priv(dev); | |
304 | spin_lock_init(&np->lock); | |
305 | ||
306 | dev->open = net_open; | |
307 | dev->stop = net_close; | |
308 | dev->hard_start_xmit = net_send_packet; | |
309 | dev->get_stats = net_get_stats; | |
310 | dev->set_multicast_list = &set_multicast_list; | |
311 | ||
312 | dev->tx_timeout = &net_tx_timeout; | |
6aa20a22 | 313 | dev->watchdog_timeo = MY_TX_TIMEOUT; |
b1fc5505 | 314 | |
315 | err = register_netdev(dev); | |
316 | if (err) | |
317 | goto out2; | |
1da177e4 | 318 | return 0; |
b1fc5505 | 319 | out2: |
320 | #ifdef jumpered_dma | |
321 | free_dma(dev->dma); | |
322 | #endif | |
1da177e4 LT |
323 | out1: |
324 | #ifdef jumpered_interrupts | |
325 | free_irq(dev->irq, dev); | |
326 | #endif | |
327 | out: | |
328 | release_region(base_addr, NETCARD_IO_EXTENT); | |
329 | return err; | |
330 | } | |
331 | ||
332 | static void net_tx_timeout(struct net_device *dev) | |
333 | { | |
334 | struct net_local *np = netdev_priv(dev); | |
335 | ||
336 | printk(KERN_WARNING "%s: transmit timed out, %s?\n", dev->name, | |
337 | tx_done(dev) ? "IRQ conflict" : "network cable problem"); | |
338 | ||
339 | /* Try to restart the adaptor. */ | |
340 | chipset_init(dev, 1); | |
341 | ||
342 | np->stats.tx_errors++; | |
343 | ||
344 | /* If we have space available to accept new transmit | |
345 | * requests, wake up the queueing layer. This would | |
346 | * be the case if the chipset_init() call above just | |
347 | * flushes out the tx queue and empties it. | |
348 | * | |
349 | * If instead, the tx queue is retained then the | |
350 | * netif_wake_queue() call should be placed in the | |
351 | * TX completion interrupt handler of the driver instead | |
352 | * of here. | |
353 | */ | |
354 | if (!tx_full(dev)) | |
355 | netif_wake_queue(dev); | |
356 | } | |
357 | ||
358 | /* | |
359 | * Open/initialize the board. This is called (in the current kernel) | |
360 | * sometime after booting when the 'ifconfig' program is run. | |
361 | * | |
362 | * This routine should set everything up anew at each open, even | |
363 | * registers that "should" only need to be set once at boot, so that | |
364 | * there is non-reboot way to recover if something goes wrong. | |
365 | */ | |
366 | static int | |
367 | net_open(struct net_device *dev) | |
368 | { | |
369 | struct net_local *np = netdev_priv(dev); | |
370 | int ioaddr = dev->base_addr; | |
371 | /* | |
372 | * This is used if the interrupt line can turned off (shared). | |
373 | * See 3c503.c for an example of selecting the IRQ at config-time. | |
374 | */ | |
375 | if (request_irq(dev->irq, &net_interrupt, 0, cardname, dev)) { | |
376 | return -EAGAIN; | |
377 | } | |
378 | /* | |
379 | * Always allocate the DMA channel after the IRQ, | |
380 | * and clean up on failure. | |
381 | */ | |
382 | if (request_dma(dev->dma, cardname)) { | |
383 | free_irq(dev->irq, dev); | |
384 | return -EAGAIN; | |
385 | } | |
386 | ||
387 | /* Reset the hardware here. Don't forget to set the station address. */ | |
388 | chipset_init(dev, 1); | |
389 | outb(0x00, ioaddr); | |
390 | np->open_time = jiffies; | |
391 | ||
392 | /* We are now ready to accept transmit requeusts from | |
393 | * the queueing layer of the networking. | |
394 | */ | |
395 | netif_start_queue(dev); | |
396 | ||
397 | return 0; | |
398 | } | |
399 | ||
400 | /* This will only be invoked if your driver is _not_ in XOFF state. | |
401 | * What this means is that you need not check it, and that this | |
402 | * invariant will hold if you make sure that the netif_*_queue() | |
403 | * calls are done at the proper times. | |
404 | */ | |
405 | static int net_send_packet(struct sk_buff *skb, struct net_device *dev) | |
406 | { | |
407 | struct net_local *np = netdev_priv(dev); | |
408 | int ioaddr = dev->base_addr; | |
409 | short length = ETH_ZLEN < skb->len ? skb->len : ETH_ZLEN; | |
410 | unsigned char *buf = skb->data; | |
411 | ||
412 | /* If some error occurs while trying to transmit this | |
413 | * packet, you should return '1' from this function. | |
414 | * In such a case you _may not_ do anything to the | |
415 | * SKB, it is still owned by the network queueing | |
416 | * layer when an error is returned. This means you | |
417 | * may not modify any SKB fields, you may not free | |
418 | * the SKB, etc. | |
419 | */ | |
420 | ||
421 | #if TX_RING | |
422 | /* This is the most common case for modern hardware. | |
423 | * The spinlock protects this code from the TX complete | |
424 | * hardware interrupt handler. Queue flow control is | |
425 | * thus managed under this lock as well. | |
426 | */ | |
427 | spin_lock_irq(&np->lock); | |
428 | ||
429 | add_to_tx_ring(np, skb, length); | |
430 | dev->trans_start = jiffies; | |
431 | ||
432 | /* If we just used up the very last entry in the | |
433 | * TX ring on this device, tell the queueing | |
434 | * layer to send no more. | |
435 | */ | |
436 | if (tx_full(dev)) | |
437 | netif_stop_queue(dev); | |
438 | ||
439 | /* When the TX completion hw interrupt arrives, this | |
440 | * is when the transmit statistics are updated. | |
441 | */ | |
442 | ||
443 | spin_unlock_irq(&np->lock); | |
444 | #else | |
445 | /* This is the case for older hardware which takes | |
446 | * a single transmit buffer at a time, and it is | |
447 | * just written to the device via PIO. | |
448 | * | |
449 | * No spin locking is needed since there is no TX complete | |
450 | * event. If by chance your card does have a TX complete | |
451 | * hardware IRQ then you may need to utilize np->lock here. | |
452 | */ | |
453 | hardware_send_packet(ioaddr, buf, length); | |
454 | np->stats.tx_bytes += skb->len; | |
455 | ||
456 | dev->trans_start = jiffies; | |
457 | ||
458 | /* You might need to clean up and record Tx statistics here. */ | |
459 | if (inw(ioaddr) == /*RU*/81) | |
460 | np->stats.tx_aborted_errors++; | |
461 | dev_kfree_skb (skb); | |
462 | #endif | |
463 | ||
464 | return 0; | |
465 | } | |
466 | ||
467 | #if TX_RING | |
468 | /* This handles TX complete events posted by the device | |
469 | * via interrupts. | |
470 | */ | |
471 | void net_tx(struct net_device *dev) | |
472 | { | |
473 | struct net_local *np = netdev_priv(dev); | |
474 | int entry; | |
475 | ||
476 | /* This protects us from concurrent execution of | |
477 | * our dev->hard_start_xmit function above. | |
478 | */ | |
479 | spin_lock(&np->lock); | |
480 | ||
481 | entry = np->tx_old; | |
482 | while (tx_entry_is_sent(np, entry)) { | |
483 | struct sk_buff *skb = np->skbs[entry]; | |
484 | ||
485 | np->stats.tx_bytes += skb->len; | |
486 | dev_kfree_skb_irq (skb); | |
487 | ||
488 | entry = next_tx_entry(np, entry); | |
489 | } | |
490 | np->tx_old = entry; | |
491 | ||
492 | /* If we had stopped the queue due to a "tx full" | |
493 | * condition, and space has now been made available, | |
494 | * wake up the queue. | |
495 | */ | |
496 | if (netif_queue_stopped(dev) && ! tx_full(dev)) | |
497 | netif_wake_queue(dev); | |
498 | ||
499 | spin_unlock(&np->lock); | |
500 | } | |
501 | #endif | |
502 | ||
503 | /* | |
504 | * The typical workload of the driver: | |
505 | * Handle the network interface interrupts. | |
506 | */ | |
7d12e780 | 507 | static irqreturn_t net_interrupt(int irq, void *dev_id) |
1da177e4 LT |
508 | { |
509 | struct net_device *dev = dev_id; | |
510 | struct net_local *np; | |
511 | int ioaddr, status; | |
512 | int handled = 0; | |
513 | ||
514 | ioaddr = dev->base_addr; | |
515 | ||
516 | np = netdev_priv(dev); | |
517 | status = inw(ioaddr + 0); | |
518 | ||
519 | if (status == 0) | |
520 | goto out; | |
521 | handled = 1; | |
522 | ||
523 | if (status & RX_INTR) { | |
524 | /* Got a packet(s). */ | |
525 | net_rx(dev); | |
526 | } | |
527 | #if TX_RING | |
528 | if (status & TX_INTR) { | |
529 | /* Transmit complete. */ | |
530 | net_tx(dev); | |
531 | np->stats.tx_packets++; | |
532 | netif_wake_queue(dev); | |
533 | } | |
534 | #endif | |
535 | if (status & COUNTERS_INTR) { | |
536 | /* Increment the appropriate 'localstats' field. */ | |
537 | np->stats.tx_window_errors++; | |
538 | } | |
539 | out: | |
540 | return IRQ_RETVAL(handled); | |
541 | } | |
542 | ||
543 | /* We have a good packet(s), get it/them out of the buffers. */ | |
544 | static void | |
545 | net_rx(struct net_device *dev) | |
546 | { | |
547 | struct net_local *lp = netdev_priv(dev); | |
548 | int ioaddr = dev->base_addr; | |
549 | int boguscount = 10; | |
550 | ||
551 | do { | |
552 | int status = inw(ioaddr); | |
553 | int pkt_len = inw(ioaddr); | |
6aa20a22 | 554 | |
1da177e4 LT |
555 | if (pkt_len == 0) /* Read all the frames? */ |
556 | break; /* Done for now */ | |
557 | ||
558 | if (status & 0x40) { /* There was an error. */ | |
559 | lp->stats.rx_errors++; | |
560 | if (status & 0x20) lp->stats.rx_frame_errors++; | |
561 | if (status & 0x10) lp->stats.rx_over_errors++; | |
562 | if (status & 0x08) lp->stats.rx_crc_errors++; | |
563 | if (status & 0x04) lp->stats.rx_fifo_errors++; | |
564 | } else { | |
565 | /* Malloc up new buffer. */ | |
566 | struct sk_buff *skb; | |
567 | ||
568 | lp->stats.rx_bytes+=pkt_len; | |
6aa20a22 | 569 | |
1da177e4 LT |
570 | skb = dev_alloc_skb(pkt_len); |
571 | if (skb == NULL) { | |
572 | printk(KERN_NOTICE "%s: Memory squeeze, dropping packet.\n", | |
573 | dev->name); | |
574 | lp->stats.rx_dropped++; | |
575 | break; | |
576 | } | |
577 | skb->dev = dev; | |
578 | ||
579 | /* 'skb->data' points to the start of sk_buff data area. */ | |
580 | memcpy(skb_put(skb,pkt_len), (void*)dev->rmem_start, | |
581 | pkt_len); | |
582 | /* or */ | |
583 | insw(ioaddr, skb->data, (pkt_len + 1) >> 1); | |
584 | ||
585 | netif_rx(skb); | |
1da177e4 LT |
586 | lp->stats.rx_packets++; |
587 | lp->stats.rx_bytes += pkt_len; | |
588 | } | |
589 | } while (--boguscount); | |
590 | ||
591 | return; | |
592 | } | |
593 | ||
594 | /* The inverse routine to net_open(). */ | |
595 | static int | |
596 | net_close(struct net_device *dev) | |
597 | { | |
598 | struct net_local *lp = netdev_priv(dev); | |
599 | int ioaddr = dev->base_addr; | |
600 | ||
601 | lp->open_time = 0; | |
602 | ||
603 | netif_stop_queue(dev); | |
604 | ||
605 | /* Flush the Tx and disable Rx here. */ | |
606 | ||
607 | disable_dma(dev->dma); | |
608 | ||
609 | /* If not IRQ or DMA jumpered, free up the line. */ | |
610 | outw(0x00, ioaddr+0); /* Release the physical interrupt line. */ | |
611 | ||
612 | free_irq(dev->irq, dev); | |
613 | free_dma(dev->dma); | |
614 | ||
615 | /* Update the statistics here. */ | |
616 | ||
617 | return 0; | |
618 | ||
619 | } | |
620 | ||
621 | /* | |
622 | * Get the current statistics. | |
623 | * This may be called with the card open or closed. | |
624 | */ | |
625 | static struct net_device_stats *net_get_stats(struct net_device *dev) | |
626 | { | |
627 | struct net_local *lp = netdev_priv(dev); | |
628 | short ioaddr = dev->base_addr; | |
629 | ||
630 | /* Update the statistics from the device registers. */ | |
631 | lp->stats.rx_missed_errors = inw(ioaddr+1); | |
632 | return &lp->stats; | |
633 | } | |
634 | ||
635 | /* | |
636 | * Set or clear the multicast filter for this adaptor. | |
637 | * num_addrs == -1 Promiscuous mode, receive all packets | |
638 | * num_addrs == 0 Normal mode, clear multicast list | |
639 | * num_addrs > 0 Multicast mode, receive normal and MC packets, | |
640 | * and do best-effort filtering. | |
641 | */ | |
642 | static void | |
643 | set_multicast_list(struct net_device *dev) | |
644 | { | |
645 | short ioaddr = dev->base_addr; | |
646 | if (dev->flags&IFF_PROMISC) | |
647 | { | |
648 | /* Enable promiscuous mode */ | |
649 | outw(MULTICAST|PROMISC, ioaddr); | |
650 | } | |
651 | else if((dev->flags&IFF_ALLMULTI) || dev->mc_count > HW_MAX_ADDRS) | |
652 | { | |
653 | /* Disable promiscuous mode, use normal mode. */ | |
654 | hardware_set_filter(NULL); | |
655 | ||
656 | outw(MULTICAST, ioaddr); | |
657 | } | |
658 | else if(dev->mc_count) | |
659 | { | |
660 | /* Walk the address list, and load the filter */ | |
661 | hardware_set_filter(dev->mc_list); | |
662 | ||
663 | outw(MULTICAST, ioaddr); | |
664 | } | |
6aa20a22 | 665 | else |
1da177e4 LT |
666 | outw(0, ioaddr); |
667 | } | |
668 | ||
669 | #ifdef MODULE | |
670 | ||
671 | static struct net_device *this_device; | |
672 | static int io = 0x300; | |
673 | static int irq; | |
674 | static int dma; | |
675 | static int mem; | |
676 | MODULE_LICENSE("GPL"); | |
677 | ||
678 | int init_module(void) | |
679 | { | |
680 | struct net_device *dev; | |
681 | int result; | |
682 | ||
683 | if (io == 0) | |
684 | printk(KERN_WARNING "%s: You shouldn't use auto-probing with insmod!\n", | |
685 | cardname); | |
686 | dev = alloc_etherdev(sizeof(struct net_local)); | |
687 | if (!dev) | |
688 | return -ENOMEM; | |
689 | ||
690 | /* Copy the parameters from insmod into the device structure. */ | |
691 | dev->base_addr = io; | |
692 | dev->irq = irq; | |
693 | dev->dma = dma; | |
694 | dev->mem_start = mem; | |
695 | if (do_netcard_probe(dev) == 0) { | |
b1fc5505 | 696 | this_device = dev; |
697 | return 0; | |
1da177e4 LT |
698 | } |
699 | free_netdev(dev); | |
700 | return -ENXIO; | |
701 | } | |
702 | ||
703 | void | |
704 | cleanup_module(void) | |
705 | { | |
706 | unregister_netdev(this_device); | |
707 | cleanup_card(this_device); | |
708 | free_netdev(this_device); | |
709 | } | |
710 | ||
711 | #endif /* MODULE */ |