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signals: consolidate checks for whether or not to ignore a signal
[deliverable/linux.git] / drivers / net / appletalk / cops.c
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1da177e4
LT		 1/* cops.c: LocalTalk driver for Linux.
2 *
3 * Authors:
4 * - Jay Schulist <jschlst@samba.org>
5 *
6 * With more than a little help from;
7 * - Alan Cox <Alan.Cox@linux.org>
8 *
9 * Derived from:
10 * - skeleton.c: A network driver outline for linux.
11 * Written 1993-94 by Donald Becker.
12 * - ltpc.c: A driver for the LocalTalk PC card.
13 * Written by Bradford W. Johnson.
14 *
15 * Copyright 1993 United States Government as represented by the
16 * Director, National Security Agency.
17 *
18 * This software may be used and distributed according to the terms
19 * of the GNU General Public License, incorporated herein by reference.
20 *
21 * Changes:
22 * 19970608 Alan Cox Allowed dual card type support
23 * Can set board type in insmod
24 * Hooks for cops_setup routine
25 * (not yet implemented).
26 * 19971101 Jay Schulist Fixes for multiple lt* devices.
27 * 19980607 Steven Hirsch Fixed the badly broken support
28 * for Tangent type cards. Only
29 * tested on Daystar LT200. Some
30 * cleanup of formatting and program
31 * logic. Added emacs 'local-vars'
32 * setup for Jay's brace style.
33 * 20000211 Alan Cox Cleaned up for softnet
34 */
35
36static const char *version =
37"cops.c:v0.04 6/7/98 Jay Schulist <jschlst@samba.org>\n";
38/*
39 * Sources:
40 * COPS Localtalk SDK. This provides almost all of the information
41 * needed.
42 */
43
44/*
45 * insmod/modprobe configurable stuff.
46 * - IO Port, choose one your card supports or 0 if you dare.
47 * - IRQ, also choose one your card supports or nothing and let
48 * the driver figure it out.
49 */
50
1da177e4
LT		 51#include <linux/module.h>
52#include <linux/kernel.h>
53#include <linux/types.h>
54#include <linux/fcntl.h>
55#include <linux/interrupt.h>
56#include <linux/ptrace.h>
57#include <linux/ioport.h>
58#include <linux/in.h>
59#include <linux/slab.h>
60#include <linux/string.h>
61#include <linux/errno.h>
62#include <linux/init.h>
63#include <linux/netdevice.h>
64#include <linux/etherdevice.h>
65#include <linux/skbuff.h>
66#include <linux/if_arp.h>
3ef4e9a8 67#include <linux/if_ltalk.h>
1da177e4
LT		 68#include <linux/delay.h> /* For udelay() */
69#include <linux/atalk.h>
70#include <linux/spinlock.h>
71#include <linux/bitops.h>
b132fba1 72#include <linux/jiffies.h>
1da177e4
LT		 73
74#include <asm/system.h>
75#include <asm/io.h>
76#include <asm/dma.h>
77
78#include "cops.h" /* Our Stuff */
79#include "cops_ltdrv.h" /* Firmware code for Tangent type cards. */
80#include "cops_ffdrv.h" /* Firmware code for Dayna type cards. */
81
82/*
83 * The name of the card. Is used for messages and in the requests for
84 * io regions, irqs and dma channels
85 */
86
87static const char *cardname = "cops";
88
89#ifdef CONFIG_COPS_DAYNA
90static int board_type = DAYNA; /* Module exported */
91#else
92static int board_type = TANGENT;
93#endif
94
95static int io = 0x240; /* Default IO for Dayna */
96static int irq = 5; /* Default IRQ */
97
98/*
99 * COPS Autoprobe information.
100 * Right now if port address is right but IRQ is not 5 this will
101 * return a 5 no matter what since we will still get a status response.
102 * Need one more additional check to narrow down after we have gotten
103 * the ioaddr. But since only other possible IRQs is 3 and 4 so no real
104 * hurry on this. I *STRONGLY* recommend using IRQ 5 for your card with
105 * this driver.
106 *
107 * This driver has 2 modes and they are: Dayna mode and Tangent mode.
108 * Each mode corresponds with the type of card. It has been found
109 * that there are 2 main types of cards and all other cards are
110 * the same and just have different names or only have minor differences
111 * such as more IO ports. As this driver is tested it will
112 * become more clear on exactly what cards are supported. The driver
113 * defaults to using Dayna mode. To change the drivers mode, simply
114 * select Dayna or Tangent mode when configuring the kernel.
115 *
116 * This driver should support:
117 * TANGENT driver mode:
118 * Tangent ATB-II, Novell NL-1000, Daystar Digital LT-200,
119 * COPS LT-1
120 * DAYNA driver mode:
121 * Dayna DL2000/DaynaTalk PC (Half Length), COPS LT-95,
122 * Farallon PhoneNET PC III, Farallon PhoneNET PC II
123 * Other cards possibly supported mode unkown though:
124 * Dayna DL2000 (Full length), COPS LT/M (Micro-Channel)
125 *
126 * Cards NOT supported by this driver but supported by the ltpc.c
127 * driver written by Bradford W. Johnson <johns393@maroon.tc.umn.edu>
128 * Farallon PhoneNET PC
129 * Original Apple LocalTalk PC card
130 *
131 * N.B.
132 *
133 * The Daystar Digital LT200 boards do not support interrupt-driven
134 * IO. You must specify 'irq=0xff' as a module parameter to invoke
135 * polled mode. I also believe that the port probing logic is quite
136 * dangerous at best and certainly hopeless for a polled card. Best to
137 * specify both. - Steve H.
138 *
139 */
140
141/*
142 * Zero terminated list of IO ports to probe.
143 */
144
145static unsigned int ports[] = {
146 0x240, 0x340, 0x200, 0x210, 0x220, 0x230, 0x260,
147 0x2A0, 0x300, 0x310, 0x320, 0x330, 0x350, 0x360,
148 0
149};
150
151/*
152 * Zero terminated list of IRQ ports to probe.
153 */
154
155static int cops_irqlist[] = {
156 5, 4, 3, 0
157};
158
159static struct timer_list cops_timer;
160
161/* use 0 for production, 1 for verification, 2 for debug, 3 for verbose debug */
162#ifndef COPS_DEBUG
163#define COPS_DEBUG 1
164#endif
165static unsigned int cops_debug = COPS_DEBUG;
166
167/* The number of low I/O ports used by the card. */
168#define COPS_IO_EXTENT 8
169
170/* Information that needs to be kept for each board. */
171
172struct cops_local
173{
174 struct net_device_stats stats;
175 int board; /* Holds what board type is. */
176 int nodeid; /* Set to 1 once have nodeid. */
177 unsigned char node_acquire; /* Node ID when acquired. */
178 struct atalk_addr node_addr; /* Full node address */
179 spinlock_t lock; /* RX/TX lock */
180};
181
182/* Index to functions, as function prototypes. */
183static int cops_probe1 (struct net_device *dev, int ioaddr);
184static int cops_irq (int ioaddr, int board);
185
186static int cops_open (struct net_device *dev);
187static int cops_jumpstart (struct net_device *dev);
188static void cops_reset (struct net_device *dev, int sleep);
189static void cops_load (struct net_device *dev);
190static int cops_nodeid (struct net_device *dev, int nodeid);
191
7d12e780 192static irqreturn_t cops_interrupt (int irq, void *dev_id);
1da177e4
LT		 193static void cops_poll (unsigned long ltdev);
194static void cops_timeout(struct net_device *dev);
195static void cops_rx (struct net_device *dev);
196static int cops_send_packet (struct sk_buff *skb, struct net_device *dev);
197static void set_multicast_list (struct net_device *dev);
1da177e4
LT		 198static int cops_ioctl (struct net_device *dev, struct ifreq *rq, int cmd);
199static int cops_close (struct net_device *dev);
200static struct net_device_stats *cops_get_stats (struct net_device *dev);
201
202static void cleanup_card(struct net_device *dev)
203{
204 if (dev->irq)
205 free_irq(dev->irq, dev);
206 release_region(dev->base_addr, COPS_IO_EXTENT);
207}
208
209/*
210 * Check for a network adaptor of this type, and return '0' iff one exists.
211 * If dev->base_addr == 0, probe all likely locations.
212 * If dev->base_addr in [1..0x1ff], always return failure.
213 * otherwise go with what we pass in.
214 */
215struct net_device * __init cops_probe(int unit)
216{
217 struct net_device *dev;
218 unsigned *port;
219 int base_addr;
220 int err = 0;
221
3ef4e9a8 222 dev = alloc_ltalkdev(sizeof(struct cops_local));
1da177e4
LT		 223 if (!dev)
224 return ERR_PTR(-ENOMEM);
225
226 if (unit >= 0) {
227 sprintf(dev->name, "lt%d", unit);
228 netdev_boot_setup_check(dev);
229 irq = dev->irq;
230 base_addr = dev->base_addr;
231 } else {
232 base_addr = dev->base_addr = io;
233 }
234
1da177e4
LT		 235 if (base_addr > 0x1ff) { /* Check a single specified location. */
236 err = cops_probe1(dev, base_addr);
237 } else if (base_addr != 0) { /* Don't probe at all. */
238 err = -ENXIO;
239 } else {
240 /* FIXME Does this really work for cards which generate irq?
241 * It's definitely N.G. for polled Tangent. sh
242 * Dayna cards don't autoprobe well at all, but if your card is
243 * at IRQ 5 & IO 0x240 we find it every time. ;) JS
244 */
245 for (port = ports; *port && cops_probe1(dev, *port) < 0; port++)
246 ;
247 if (!*port)
248 err = -ENODEV;
249 }
250 if (err)
251 goto out;
252 err = register_netdev(dev);
253 if (err)
254 goto out1;
255 return dev;
256out1:
257 cleanup_card(dev);
258out:
259 free_netdev(dev);
260 return ERR_PTR(err);
261}
262
263/*
264 * This is the real probe routine. Linux has a history of friendly device
265 * probes on the ISA bus. A good device probes avoids doing writes, and
266 * verifies that the correct device exists and functions.
267 */
268static int __init cops_probe1(struct net_device *dev, int ioaddr)
269{
270 struct cops_local *lp;
271 static unsigned version_printed;
272 int board = board_type;
273 int retval;
274
275 if(cops_debug && version_printed++ == 0)
276 printk("%s", version);
277
278 /* Grab the region so no one else tries to probe our ioports. */
279 if (!request_region(ioaddr, COPS_IO_EXTENT, dev->name))
280 return -EBUSY;
281
282 /*
283 * Since this board has jumpered interrupts, allocate the interrupt
284 * vector now. There is no point in waiting since no other device
285 * can use the interrupt, and this marks the irq as busy. Jumpered
286 * interrupts are typically not reported by the boards, and we must
287 * used AutoIRQ to find them.
288 */
289 dev->irq = irq;
290 switch (dev->irq)
291 {
292 case 0:
293 /* COPS AutoIRQ routine */
294 dev->irq = cops_irq(ioaddr, board);
295 if (dev->irq)
296 break;
297 /* No IRQ found on this port, fallthrough */
298 case 1:
299 retval = -EINVAL;
300 goto err_out;
301
302 /* Fixup for users that don't know that IRQ 2 is really
303 * IRQ 9, or don't know which one to set.
304 */
305 case 2:
306 dev->irq = 9;
307 break;
308
309 /* Polled operation requested. Although irq of zero passed as
310 * a parameter tells the init routines to probe, we'll
311 * overload it to denote polled operation at runtime.
312 */
313 case 0xff:
314 dev->irq = 0;
315 break;
316
317 default:
318 break;
319 }
320
321 /* Reserve any actual interrupt. */
322 if (dev->irq) {
323 retval = request_irq(dev->irq, &cops_interrupt, 0, dev->name, dev);
324 if (retval)
325 goto err_out;
326 }
327
328 dev->base_addr = ioaddr;
329
330 lp = netdev_priv(dev);
1da177e4
LT		 331 spin_lock_init(&lp->lock);
332
333 /* Copy local board variable to lp struct. */
334 lp->board = board;
335
336 dev->hard_start_xmit = cops_send_packet;
337 dev->tx_timeout = cops_timeout;
338 dev->watchdog_timeo = HZ * 2;
3b04ddde 339
1da177e4
LT		 340 dev->get_stats = cops_get_stats;
341 dev->open = cops_open;
342 dev->stop = cops_close;
343 dev->do_ioctl = cops_ioctl;
344 dev->set_multicast_list = set_multicast_list;
345 dev->mc_list = NULL;
346
347 /* Tell the user where the card is and what mode we're in. */
348 if(board==DAYNA)
349 printk("%s: %s at %#3x, using IRQ %d, in Dayna mode.\n",
350 dev->name, cardname, ioaddr, dev->irq);
351 if(board==TANGENT) {
352 if(dev->irq)
353 printk("%s: %s at %#3x, IRQ %d, in Tangent mode\n",
354 dev->name, cardname, ioaddr, dev->irq);
355 else
356 printk("%s: %s at %#3x, using polled IO, in Tangent mode.\n",
357 dev->name, cardname, ioaddr);
358
359 }
360 return 0;
361
362err_out:
363 release_region(ioaddr, COPS_IO_EXTENT);
364 return retval;
365}
366
367static int __init cops_irq (int ioaddr, int board)
368{ /*
369 * This does not use the IRQ to determine where the IRQ is. We just
370 * assume that when we get a correct status response that it's the IRQ.
371 * This really just verifies the IO port but since we only have access
372 * to such a small number of IRQs (5, 4, 3) this is not bad.
373 * This will probably not work for more than one card.
374 */
375 int irqaddr=0;
376 int i, x, status;
377
378 if(board==DAYNA)
379 {
380 outb(0, ioaddr+DAYNA_RESET);
381 inb(ioaddr+DAYNA_RESET);
382 mdelay(333);
383 }
384 if(board==TANGENT)
385 {
386 inb(ioaddr);
387 outb(0, ioaddr);
388 outb(0, ioaddr+TANG_RESET);
389 }
390
391 for(i=0; cops_irqlist[i] !=0; i++)
392 {
393 irqaddr = cops_irqlist[i];
394 for(x = 0xFFFF; x>0; x --) /* wait for response */
395 {
396 if(board==DAYNA)
397 {
398 status = (inb(ioaddr+DAYNA_CARD_STATUS)&3);
399 if(status == 1)
400 return irqaddr;
401 }
402 if(board==TANGENT)
403 {
404 if((inb(ioaddr+TANG_CARD_STATUS)& TANG_TX_READY) !=0)
405 return irqaddr;
406 }
407 }
408 }
409 return 0; /* no IRQ found */
410}
411
412/*
413 * Open/initialize the board. This is called (in the current kernel)
414 * sometime after booting when the 'ifconfig' program is run.
415 */
416static int cops_open(struct net_device *dev)
417{
418 struct cops_local *lp = netdev_priv(dev);
419
420 if(dev->irq==0)
421 {
422 /*
423 * I don't know if the Dayna-style boards support polled
424 * operation. For now, only allow it for Tangent.
425 */
426 if(lp->board==TANGENT) /* Poll 20 times per second */
427 {
428 init_timer(&cops_timer);
429 cops_timer.function = cops_poll;
430 cops_timer.data = (unsigned long)dev;
431 cops_timer.expires = jiffies + HZ/20;
432 add_timer(&cops_timer);
433 }
434 else
435 {
436 printk(KERN_WARNING "%s: No irq line set\n", dev->name);
437 return -EAGAIN;
438 }
439 }
440
441 cops_jumpstart(dev); /* Start the card up. */
442
443 netif_start_queue(dev);
444 return 0;
445}
446
447/*
448 * This allows for a dynamic start/restart of the entire card.
449 */
450static int cops_jumpstart(struct net_device *dev)
451{
452 struct cops_local *lp = netdev_priv(dev);
453
454 /*
455 * Once the card has the firmware loaded and has acquired
456 * the nodeid, if it is reset it will lose it all.
457 */
458 cops_reset(dev,1); /* Need to reset card before load firmware. */
459 cops_load(dev); /* Load the firmware. */
460
461 /*
462 * If atalkd already gave us a nodeid we will use that
463 * one again, else we wait for atalkd to give us a nodeid
464 * in cops_ioctl. This may cause a problem if someone steals
465 * our nodeid while we are resetting.
466 */
467 if(lp->nodeid == 1)
468 cops_nodeid(dev,lp->node_acquire);
469
470 return 0;
471}
472
473static void tangent_wait_reset(int ioaddr)
474{
475 int timeout=0;
476
477 while(timeout++ < 5 && (inb(ioaddr+TANG_CARD_STATUS)&TANG_TX_READY)==0)
478 mdelay(1); /* Wait 1 second */
479}
480
481/*
482 * Reset the LocalTalk board.
483 */
484static void cops_reset(struct net_device *dev, int sleep)
485{
486 struct cops_local *lp = netdev_priv(dev);
487 int ioaddr=dev->base_addr;
488
489 if(lp->board==TANGENT)
490 {
491 inb(ioaddr); /* Clear request latch. */
492 outb(0,ioaddr); /* Clear the TANG_TX_READY flop. */
493 outb(0, ioaddr+TANG_RESET); /* Reset the adapter. */
494
495 tangent_wait_reset(ioaddr);
496 outb(0, ioaddr+TANG_CLEAR_INT);
497 }
498 if(lp->board==DAYNA)
499 {
500 outb(0, ioaddr+DAYNA_RESET); /* Assert the reset port */
501 inb(ioaddr+DAYNA_RESET); /* Clear the reset */
502 if(sleep)
503 {
504 long snap=jiffies;
505
506 /* Let card finish initializing, about 1/3 second */
b132fba1 507 while (time_before(jiffies, snap + HZ/3))
1da177e4
LT		 508 schedule();
509 }
510 else
511 mdelay(333);
512 }
513 netif_wake_queue(dev);
514 return;
515}
516
517static void cops_load (struct net_device *dev)
518{
519 struct ifreq ifr;
520 struct ltfirmware *ltf= (struct ltfirmware *)&ifr.ifr_ifru;
521 struct cops_local *lp = netdev_priv(dev);
522 int ioaddr=dev->base_addr;
523 int length, i = 0;
524
525 strcpy(ifr.ifr_name,"lt0");
526
527 /* Get card's firmware code and do some checks on it. */
528#ifdef CONFIG_COPS_DAYNA
529 if(lp->board==DAYNA)
530 {
531 ltf->length=sizeof(ffdrv_code);
532 ltf->data=ffdrv_code;
533 }
534 else
535#endif
536#ifdef CONFIG_COPS_TANGENT
537 if(lp->board==TANGENT)
538 {
539 ltf->length=sizeof(ltdrv_code);
540 ltf->data=ltdrv_code;
541 }
542 else
543#endif
544 {
545 printk(KERN_INFO "%s; unsupported board type.\n", dev->name);
546 return;
547 }
548
549 /* Check to make sure firmware is correct length. */
550 if(lp->board==DAYNA && ltf->length!=5983)
551 {
552 printk(KERN_WARNING "%s: Firmware is not length of FFDRV.BIN.\n", dev->name);
553 return;
554 }
555 if(lp->board==TANGENT && ltf->length!=2501)
556 {
557 printk(KERN_WARNING "%s: Firmware is not length of DRVCODE.BIN.\n", dev->name);
558 return;
559 }
560
561 if(lp->board==DAYNA)
562 {
563 /*
564 * We must wait for a status response
565 * with the DAYNA board.
566 */
567 while(++i<65536)
568 {
569 if((inb(ioaddr+DAYNA_CARD_STATUS)&3)==1)
570 break;
571 }
572
573 if(i==65536)
574 return;
575 }
576
577 /*
578 * Upload the firmware and kick. Byte-by-byte works nicely here.
579 */
580 i=0;
581 length = ltf->length;
582 while(length--)
583 {
584 outb(ltf->data[i], ioaddr);
585 i++;
586 }
587
588 if(cops_debug > 1)
589 printk("%s: Uploaded firmware - %d bytes of %d bytes.\n",
590 dev->name, i, ltf->length);
591
592 if(lp->board==DAYNA) /* Tell Dayna to run the firmware code. */
593 outb(1, ioaddr+DAYNA_INT_CARD);
594 else /* Tell Tang to run the firmware code. */
595 inb(ioaddr);
596
597 if(lp->board==TANGENT)
598 {
599 tangent_wait_reset(ioaddr);
600 inb(ioaddr); /* Clear initial ready signal. */
601 }
602
603 return;
604}
605
606/*
607 * Get the LocalTalk Nodeid from the card. We can suggest
608 * any nodeid 1-254. The card will try and get that exact
609 * address else we can specify 0 as the nodeid and the card
610 * will autoprobe for a nodeid.
611 */
612static int cops_nodeid (struct net_device *dev, int nodeid)
613{
614 struct cops_local *lp = netdev_priv(dev);
615 int ioaddr = dev->base_addr;
616
617 if(lp->board == DAYNA)
618 {
619 /* Empty any pending adapter responses. */
620 while((inb(ioaddr+DAYNA_CARD_STATUS)&DAYNA_TX_READY)==0)
621 {
622 outb(0, ioaddr+COPS_CLEAR_INT); /* Clear interrupts. */
623 if((inb(ioaddr+DAYNA_CARD_STATUS)&0x03)==DAYNA_RX_REQUEST)
624 cops_rx(dev); /* Kick any packets waiting. */
625 schedule();
626 }
627
628 outb(2, ioaddr); /* Output command packet length as 2. */
629 outb(0, ioaddr);
630 outb(LAP_INIT, ioaddr); /* Send LAP_INIT command byte. */
631 outb(nodeid, ioaddr); /* Suggest node address. */
632 }
633
634 if(lp->board == TANGENT)
635 {
636 /* Empty any pending adapter responses. */
637 while(inb(ioaddr+TANG_CARD_STATUS)&TANG_RX_READY)
638 {
639 outb(0, ioaddr+COPS_CLEAR_INT); /* Clear interrupt. */
640 cops_rx(dev); /* Kick out packets waiting. */
641 schedule();
642 }
643
644 /* Not sure what Tangent does if nodeid picked is used. */
645 if(nodeid == 0) /* Seed. */
646 nodeid = jiffies&0xFF; /* Get a random try */
647 outb(2, ioaddr); /* Command length LSB */
648 outb(0, ioaddr); /* Command length MSB */
649 outb(LAP_INIT, ioaddr); /* Send LAP_INIT byte */
650 outb(nodeid, ioaddr); /* LAP address hint. */
651 outb(0xFF, ioaddr); /* Int. level to use */
652 }
653
654 lp->node_acquire=0; /* Set nodeid holder to 0. */
655 while(lp->node_acquire==0) /* Get *True* nodeid finally. */
656 {
657 outb(0, ioaddr+COPS_CLEAR_INT); /* Clear any interrupt. */
658
659 if(lp->board == DAYNA)
660 {
661 if((inb(ioaddr+DAYNA_CARD_STATUS)&0x03)==DAYNA_RX_REQUEST)
662 cops_rx(dev); /* Grab the nodeid put in lp->node_acquire. */
663 }
664 if(lp->board == TANGENT)
665 {
666 if(inb(ioaddr+TANG_CARD_STATUS)&TANG_RX_READY)
667 cops_rx(dev); /* Grab the nodeid put in lp->node_acquire. */
668 }
669 schedule();
670 }
671
672 if(cops_debug > 1)
673 printk(KERN_DEBUG "%s: Node ID %d has been acquired.\n",
674 dev->name, lp->node_acquire);
675
676 lp->nodeid=1; /* Set got nodeid to 1. */
677
678 return 0;
679}
680
681/*
682 * Poll the Tangent type cards to see if we have work.
683 */
684
685static void cops_poll(unsigned long ltdev)
686{
687 int ioaddr, status;
688 int boguscount = 0;
689
690 struct net_device *dev = (struct net_device *)ltdev;
691
692 del_timer(&cops_timer);
693
694 if(dev == NULL)
695 return; /* We've been downed */
696
697 ioaddr = dev->base_addr;
698 do {
699 status=inb(ioaddr+TANG_CARD_STATUS);
700 if(status & TANG_RX_READY)
701 cops_rx(dev);
702 if(status & TANG_TX_READY)
703 netif_wake_queue(dev);
704 status = inb(ioaddr+TANG_CARD_STATUS);
705 } while((++boguscount < 20) && (status&(TANG_RX_READY|TANG_TX_READY)));
706
707 /* poll 20 times per second */
708 cops_timer.expires = jiffies + HZ/20;
709 add_timer(&cops_timer);
710
711 return;
712}
713
714/*
715 * The typical workload of the driver:
716 * Handle the network interface interrupts.
717 */
7d12e780 718static irqreturn_t cops_interrupt(int irq, void *dev_id)
1da177e4
LT		 719{
720 struct net_device *dev = dev_id;
721 struct cops_local *lp;
722 int ioaddr, status;
723 int boguscount = 0;
724
725 ioaddr = dev->base_addr;
726 lp = netdev_priv(dev);
727
728 if(lp->board==DAYNA)
729 {
730 do {
731 outb(0, ioaddr + COPS_CLEAR_INT);
732 status=inb(ioaddr+DAYNA_CARD_STATUS);
733 if((status&0x03)==DAYNA_RX_REQUEST)
734 cops_rx(dev);
735 netif_wake_queue(dev);
736 } while(++boguscount < 20);
737 }
738 else
739 {
740 do {
741 status=inb(ioaddr+TANG_CARD_STATUS);
742 if(status & TANG_RX_READY)
743 cops_rx(dev);
744 if(status & TANG_TX_READY)
745 netif_wake_queue(dev);
746 status=inb(ioaddr+TANG_CARD_STATUS);
747 } while((++boguscount < 20) && (status&(TANG_RX_READY|TANG_TX_READY)));
748 }
749
750 return IRQ_HANDLED;
751}
752
753/*
754 * We have a good packet(s), get it/them out of the buffers.
755 */
756static void cops_rx(struct net_device *dev)
757{
758 int pkt_len = 0;
759 int rsp_type = 0;
760 struct sk_buff *skb = NULL;
761 struct cops_local *lp = netdev_priv(dev);
762 int ioaddr = dev->base_addr;
763 int boguscount = 0;
764 unsigned long flags;
765
766
767 spin_lock_irqsave(&lp->lock, flags);
768
769 if(lp->board==DAYNA)
770 {
771 outb(0, ioaddr); /* Send out Zero length. */
772 outb(0, ioaddr);
773 outb(DATA_READ, ioaddr); /* Send read command out. */
774
775 /* Wait for DMA to turn around. */
776 while(++boguscount<1000000)
777 {
778 barrier();
779 if((inb(ioaddr+DAYNA_CARD_STATUS)&0x03)==DAYNA_RX_READY)
780 break;
781 }
782
783 if(boguscount==1000000)
784 {
785 printk(KERN_WARNING "%s: DMA timed out.\n",dev->name);
786 spin_unlock_irqrestore(&lp->lock, flags);
787 return;
788 }
789 }
790
791 /* Get response length. */
792 if(lp->board==DAYNA)
793 pkt_len = inb(ioaddr) & 0xFF;
794 else
795 pkt_len = inb(ioaddr) & 0x00FF;
796 pkt_len |= (inb(ioaddr) << 8);
797 /* Input IO code. */
798 rsp_type=inb(ioaddr);
799
800 /* Malloc up new buffer. */
801 skb = dev_alloc_skb(pkt_len);
802 if(skb == NULL)
803 {
804 printk(KERN_WARNING "%s: Memory squeeze, dropping packet.\n",
805 dev->name);
806 lp->stats.rx_dropped++;
807 while(pkt_len--) /* Discard packet */
808 inb(ioaddr);
809 spin_unlock_irqrestore(&lp->lock, flags);
810 return;
811 }
812 skb->dev = dev;
813 skb_put(skb, pkt_len);
814 skb->protocol = htons(ETH_P_LOCALTALK);
815
816 insb(ioaddr, skb->data, pkt_len); /* Eat the Data */
817
818 if(lp->board==DAYNA)
819 outb(1, ioaddr+DAYNA_INT_CARD); /* Interrupt the card */
820
821 spin_unlock_irqrestore(&lp->lock, flags); /* Restore interrupts. */
822
823 /* Check for bad response length */
824 if(pkt_len < 0 || pkt_len > MAX_LLAP_SIZE)
825 {
826 printk(KERN_WARNING "%s: Bad packet length of %d bytes.\n",
827 dev->name, pkt_len);
828 lp->stats.tx_errors++;
829 dev_kfree_skb_any(skb);
830 return;
831 }
832
833 /* Set nodeid and then get out. */
834 if(rsp_type == LAP_INIT_RSP)
835 { /* Nodeid taken from received packet. */
836 lp->node_acquire = skb->data[0];
837 dev_kfree_skb_any(skb);
838 return;
839 }
840
841 /* One last check to make sure we have a good packet. */
842 if(rsp_type != LAP_RESPONSE)
843 {
844 printk(KERN_WARNING "%s: Bad packet type %d.\n", dev->name, rsp_type);
845 lp->stats.tx_errors++;
846 dev_kfree_skb_any(skb);
847 return;
848 }
849
459a98ed 850 skb_reset_mac_header(skb); /* Point to entire packet. */
1da177e4 851 skb_pull(skb,3);
badff6d0 852 skb_reset_transport_header(skb); /* Point to data (Skip header). */
1da177e4
LT		 853
854 /* Update the counters. */
855 lp->stats.rx_packets++;
856 lp->stats.rx_bytes += skb->len;
857
858 /* Send packet to a higher place. */
859 netif_rx(skb);
860 dev->last_rx = jiffies;
861}
862
863static void cops_timeout(struct net_device *dev)
864{
865 struct cops_local *lp = netdev_priv(dev);
866 int ioaddr = dev->base_addr;
867
868 lp->stats.tx_errors++;
869 if(lp->board==TANGENT)
870 {
871 if((inb(ioaddr+TANG_CARD_STATUS)&TANG_TX_READY)==0)
872 printk(KERN_WARNING "%s: No TX complete interrupt.\n", dev->name);
873 }
874 printk(KERN_WARNING "%s: Transmit timed out.\n", dev->name);
875 cops_jumpstart(dev); /* Restart the card. */
876 dev->trans_start = jiffies;
877 netif_wake_queue(dev);
878}
879
880
881/*
882 * Make the card transmit a LocalTalk packet.
883 */
884
885static int cops_send_packet(struct sk_buff *skb, struct net_device *dev)
886{
887 struct cops_local *lp = netdev_priv(dev);
888 int ioaddr = dev->base_addr;
889 unsigned long flags;
890
891 /*
892 * Block a timer-based transmit from overlapping.
893 */
894
895 netif_stop_queue(dev);
896
897 spin_lock_irqsave(&lp->lock, flags);
898 if(lp->board == DAYNA) /* Wait for adapter transmit buffer. */
899 while((inb(ioaddr+DAYNA_CARD_STATUS)&DAYNA_TX_READY)==0)
900 cpu_relax();
901 if(lp->board == TANGENT) /* Wait for adapter transmit buffer. */
902 while((inb(ioaddr+TANG_CARD_STATUS)&TANG_TX_READY)==0)
903 cpu_relax();
904
905 /* Output IO length. */
906 outb(skb->len, ioaddr);
907 if(lp->board == DAYNA)
908 outb(skb->len >> 8, ioaddr);
909 else
910 outb((skb->len >> 8)&0x0FF, ioaddr);
911
912 /* Output IO code. */
913 outb(LAP_WRITE, ioaddr);
914
915 if(lp->board == DAYNA) /* Check the transmit buffer again. */
916 while((inb(ioaddr+DAYNA_CARD_STATUS)&DAYNA_TX_READY)==0);
917
918 outsb(ioaddr, skb->data, skb->len); /* Send out the data. */
919
920 if(lp->board==DAYNA) /* Dayna requires you kick the card */
921 outb(1, ioaddr+DAYNA_INT_CARD);
922
923 spin_unlock_irqrestore(&lp->lock, flags); /* Restore interrupts. */
924
925 /* Done sending packet, update counters and cleanup. */
926 lp->stats.tx_packets++;
927 lp->stats.tx_bytes += skb->len;
928 dev->trans_start = jiffies;
929 dev_kfree_skb (skb);
930 return 0;
931}
932
933/*
934 * Dummy function to keep the Appletalk layer happy.
935 */
936
937static void set_multicast_list(struct net_device *dev)
938{
939 if(cops_debug >= 3)
940 printk("%s: set_multicast_list executed\n", dev->name);
941}
942
1da177e4
LT		 943/*
944 * System ioctls for the COPS LocalTalk card.
945 */
946
947static int cops_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
948{
949 struct cops_local *lp = netdev_priv(dev);
950 struct sockaddr_at *sa = (struct sockaddr_at *)&ifr->ifr_addr;
951 struct atalk_addr *aa = (struct atalk_addr *)&lp->node_addr;
952
953 switch(cmd)
954 {
955 case SIOCSIFADDR:
956 /* Get and set the nodeid and network # atalkd wants. */
957 cops_nodeid(dev, sa->sat_addr.s_node);
958 aa->s_net = sa->sat_addr.s_net;
959 aa->s_node = lp->node_acquire;
960
961 /* Set broardcast address. */
962 dev->broadcast[0] = 0xFF;
963
964 /* Set hardware address. */
965 dev->dev_addr[0] = aa->s_node;
966 dev->addr_len = 1;
967 return 0;
968
969 case SIOCGIFADDR:
970 sa->sat_addr.s_net = aa->s_net;
971 sa->sat_addr.s_node = aa->s_node;
972 return 0;
973
974 default:
975 return -EOPNOTSUPP;
976 }
977}
978
979/*
980 * The inverse routine to cops_open().
981 */
982
983static int cops_close(struct net_device *dev)
984{
985 struct cops_local *lp = netdev_priv(dev);
986
987 /* If we were running polled, yank the timer.
988 */
989 if(lp->board==TANGENT && dev->irq==0)
990 del_timer(&cops_timer);
991
992 netif_stop_queue(dev);
993 return 0;
994}
995
996/*
997 * Get the current statistics.
998 * This may be called with the card open or closed.
999 */
1000static struct net_device_stats *cops_get_stats(struct net_device *dev)
1001{
1002 struct cops_local *lp = netdev_priv(dev);
1003 return &lp->stats;
1004}
1005
1006#ifdef MODULE
1007static struct net_device *cops_dev;
1008
1009MODULE_LICENSE("GPL");
1010module_param(io, int, 0);
1011module_param(irq, int, 0);
1012module_param(board_type, int, 0);
1013
b32dac08 1014static int __init cops_module_init(void)
1da177e4
LT		 1015{
1016 if (io == 0)
1017 printk(KERN_WARNING "%s: You shouldn't autoprobe with insmod\n",
1018 cardname);
1019 cops_dev = cops_probe(-1);
1020 if (IS_ERR(cops_dev))
1021 return PTR_ERR(cops_dev);
1022 return 0;
1023}
1024
b32dac08 1025static void __exit cops_module_exit(void)
1da177e4
LT		 1026{
1027 unregister_netdev(cops_dev);
1028 cleanup_card(cops_dev);
1029 free_netdev(cops_dev);
1030}
b32dac08
JS		 1031module_init(cops_module_init);
1032module_exit(cops_module_exit);
1da177e4
LT		 1033#endif /* MODULE */
1034
1035/*
1036 * Local variables:
1037 * compile-command: "gcc -DMODVERSIONS -DMODULE -D__KERNEL__ -Wall -Wstrict-prototypes -O2 -c cops.c"
1038 * c-basic-offset: 4
1039 * c-file-offsets: ((substatement-open . 0))
1040 * End:
1041 */
Linux kernel - Deliverables
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