Loading...
Note: File does not exist in v6.8.
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@lxorguk.ukuu.org.uk>
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
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/string.h>
60#include <linux/errno.h>
61#include <linux/init.h>
62#include <linux/netdevice.h>
63#include <linux/etherdevice.h>
64#include <linux/skbuff.h>
65#include <linux/if_arp.h>
66#include <linux/if_ltalk.h>
67#include <linux/delay.h> /* For udelay() */
68#include <linux/atalk.h>
69#include <linux/spinlock.h>
70#include <linux/bitops.h>
71#include <linux/jiffies.h>
72
73#include <net/Space.h>
74
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 unknown 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;
160static struct net_device *cops_timer_dev;
161
162/* use 0 for production, 1 for verification, 2 for debug, 3 for verbose debug */
163#ifndef COPS_DEBUG
164#define COPS_DEBUG 1
165#endif
166static unsigned int cops_debug = COPS_DEBUG;
167
168/* The number of low I/O ports used by the card. */
169#define COPS_IO_EXTENT 8
170
171/* Information that needs to be kept for each board. */
172
173struct cops_local
174{
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
192static irqreturn_t cops_interrupt (int irq, void *dev_id);
193static void cops_poll(struct timer_list *t);
194static void cops_timeout(struct net_device *dev, unsigned int txqueue);
195static void cops_rx (struct net_device *dev);
196static netdev_tx_t cops_send_packet (struct sk_buff *skb,
197 struct net_device *dev);
198static void set_multicast_list (struct net_device *dev);
199static int cops_ioctl (struct net_device *dev, struct ifreq *rq, int cmd);
200static int cops_close (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
222 dev = alloc_ltalkdev(sizeof(struct cops_local));
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
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
263static const struct net_device_ops cops_netdev_ops = {
264 .ndo_open = cops_open,
265 .ndo_stop = cops_close,
266 .ndo_start_xmit = cops_send_packet,
267 .ndo_tx_timeout = cops_timeout,
268 .ndo_do_ioctl = cops_ioctl,
269 .ndo_set_rx_mode = set_multicast_list,
270};
271
272/*
273 * This is the real probe routine. Linux has a history of friendly device
274 * probes on the ISA bus. A good device probes avoids doing writes, and
275 * verifies that the correct device exists and functions.
276 */
277static int __init cops_probe1(struct net_device *dev, int ioaddr)
278{
279 struct cops_local *lp;
280 static unsigned version_printed;
281 int board = board_type;
282 int retval;
283
284 if(cops_debug && version_printed++ == 0)
285 printk("%s", version);
286
287 /* Grab the region so no one else tries to probe our ioports. */
288 if (!request_region(ioaddr, COPS_IO_EXTENT, dev->name))
289 return -EBUSY;
290
291 /*
292 * Since this board has jumpered interrupts, allocate the interrupt
293 * vector now. There is no point in waiting since no other device
294 * can use the interrupt, and this marks the irq as busy. Jumpered
295 * interrupts are typically not reported by the boards, and we must
296 * used AutoIRQ to find them.
297 */
298 dev->irq = irq;
299 switch (dev->irq)
300 {
301 case 0:
302 /* COPS AutoIRQ routine */
303 dev->irq = cops_irq(ioaddr, board);
304 if (dev->irq)
305 break;
306 fallthrough; /* Once no IRQ found on this port */
307 case 1:
308 retval = -EINVAL;
309 goto err_out;
310
311 /* Fixup for users that don't know that IRQ 2 is really
312 * IRQ 9, or don't know which one to set.
313 */
314 case 2:
315 dev->irq = 9;
316 break;
317
318 /* Polled operation requested. Although irq of zero passed as
319 * a parameter tells the init routines to probe, we'll
320 * overload it to denote polled operation at runtime.
321 */
322 case 0xff:
323 dev->irq = 0;
324 break;
325
326 default:
327 break;
328 }
329
330 dev->base_addr = ioaddr;
331
332 /* Reserve any actual interrupt. */
333 if (dev->irq) {
334 retval = request_irq(dev->irq, cops_interrupt, 0, dev->name, dev);
335 if (retval)
336 goto err_out;
337 }
338
339 lp = netdev_priv(dev);
340 spin_lock_init(&lp->lock);
341
342 /* Copy local board variable to lp struct. */
343 lp->board = board;
344
345 dev->netdev_ops = &cops_netdev_ops;
346 dev->watchdog_timeo = HZ * 2;
347
348
349 /* Tell the user where the card is and what mode we're in. */
350 if(board==DAYNA)
351 printk("%s: %s at %#3x, using IRQ %d, in Dayna mode.\n",
352 dev->name, cardname, ioaddr, dev->irq);
353 if(board==TANGENT) {
354 if(dev->irq)
355 printk("%s: %s at %#3x, IRQ %d, in Tangent mode\n",
356 dev->name, cardname, ioaddr, dev->irq);
357 else
358 printk("%s: %s at %#3x, using polled IO, in Tangent mode.\n",
359 dev->name, cardname, ioaddr);
360
361 }
362 return 0;
363
364err_out:
365 release_region(ioaddr, COPS_IO_EXTENT);
366 return retval;
367}
368
369static int __init cops_irq (int ioaddr, int board)
370{ /*
371 * This does not use the IRQ to determine where the IRQ is. We just
372 * assume that when we get a correct status response that it's the IRQ.
373 * This really just verifies the IO port but since we only have access
374 * to such a small number of IRQs (5, 4, 3) this is not bad.
375 * This will probably not work for more than one card.
376 */
377 int irqaddr=0;
378 int i, x, status;
379
380 if(board==DAYNA)
381 {
382 outb(0, ioaddr+DAYNA_RESET);
383 inb(ioaddr+DAYNA_RESET);
384 mdelay(333);
385 }
386 if(board==TANGENT)
387 {
388 inb(ioaddr);
389 outb(0, ioaddr);
390 outb(0, ioaddr+TANG_RESET);
391 }
392
393 for(i=0; cops_irqlist[i] !=0; i++)
394 {
395 irqaddr = cops_irqlist[i];
396 for(x = 0xFFFF; x>0; x --) /* wait for response */
397 {
398 if(board==DAYNA)
399 {
400 status = (inb(ioaddr+DAYNA_CARD_STATUS)&3);
401 if(status == 1)
402 return irqaddr;
403 }
404 if(board==TANGENT)
405 {
406 if((inb(ioaddr+TANG_CARD_STATUS)& TANG_TX_READY) !=0)
407 return irqaddr;
408 }
409 }
410 }
411 return 0; /* no IRQ found */
412}
413
414/*
415 * Open/initialize the board. This is called (in the current kernel)
416 * sometime after booting when the 'ifconfig' program is run.
417 */
418static int cops_open(struct net_device *dev)
419{
420 struct cops_local *lp = netdev_priv(dev);
421
422 if(dev->irq==0)
423 {
424 /*
425 * I don't know if the Dayna-style boards support polled
426 * operation. For now, only allow it for Tangent.
427 */
428 if(lp->board==TANGENT) /* Poll 20 times per second */
429 {
430 cops_timer_dev = dev;
431 timer_setup(&cops_timer, cops_poll, 0);
432 cops_timer.expires = jiffies + HZ/20;
433 add_timer(&cops_timer);
434 }
435 else
436 {
437 printk(KERN_WARNING "%s: No irq line set\n", dev->name);
438 return -EAGAIN;
439 }
440 }
441
442 cops_jumpstart(dev); /* Start the card up. */
443
444 netif_start_queue(dev);
445 return 0;
446}
447
448/*
449 * This allows for a dynamic start/restart of the entire card.
450 */
451static int cops_jumpstart(struct net_device *dev)
452{
453 struct cops_local *lp = netdev_priv(dev);
454
455 /*
456 * Once the card has the firmware loaded and has acquired
457 * the nodeid, if it is reset it will lose it all.
458 */
459 cops_reset(dev,1); /* Need to reset card before load firmware. */
460 cops_load(dev); /* Load the firmware. */
461
462 /*
463 * If atalkd already gave us a nodeid we will use that
464 * one again, else we wait for atalkd to give us a nodeid
465 * in cops_ioctl. This may cause a problem if someone steals
466 * our nodeid while we are resetting.
467 */
468 if(lp->nodeid == 1)
469 cops_nodeid(dev,lp->node_acquire);
470
471 return 0;
472}
473
474static void tangent_wait_reset(int ioaddr)
475{
476 int timeout=0;
477
478 while(timeout++ < 5 && (inb(ioaddr+TANG_CARD_STATUS)&TANG_TX_READY)==0)
479 mdelay(1); /* Wait 1 second */
480}
481
482/*
483 * Reset the LocalTalk board.
484 */
485static void cops_reset(struct net_device *dev, int sleep)
486{
487 struct cops_local *lp = netdev_priv(dev);
488 int ioaddr=dev->base_addr;
489
490 if(lp->board==TANGENT)
491 {
492 inb(ioaddr); /* Clear request latch. */
493 outb(0,ioaddr); /* Clear the TANG_TX_READY flop. */
494 outb(0, ioaddr+TANG_RESET); /* Reset the adapter. */
495
496 tangent_wait_reset(ioaddr);
497 outb(0, ioaddr+TANG_CLEAR_INT);
498 }
499 if(lp->board==DAYNA)
500 {
501 outb(0, ioaddr+DAYNA_RESET); /* Assert the reset port */
502 inb(ioaddr+DAYNA_RESET); /* Clear the reset */
503 if (sleep)
504 msleep(333);
505 else
506 mdelay(333);
507 }
508
509 netif_wake_queue(dev);
510}
511
512static void cops_load (struct net_device *dev)
513{
514 struct ifreq ifr;
515 struct ltfirmware *ltf= (struct ltfirmware *)&ifr.ifr_ifru;
516 struct cops_local *lp = netdev_priv(dev);
517 int ioaddr=dev->base_addr;
518 int length, i = 0;
519
520 strcpy(ifr.ifr_name,"lt0");
521
522 /* Get card's firmware code and do some checks on it. */
523#ifdef CONFIG_COPS_DAYNA
524 if(lp->board==DAYNA)
525 {
526 ltf->length=sizeof(ffdrv_code);
527 ltf->data=ffdrv_code;
528 }
529 else
530#endif
531#ifdef CONFIG_COPS_TANGENT
532 if(lp->board==TANGENT)
533 {
534 ltf->length=sizeof(ltdrv_code);
535 ltf->data=ltdrv_code;
536 }
537 else
538#endif
539 {
540 printk(KERN_INFO "%s; unsupported board type.\n", dev->name);
541 return;
542 }
543
544 /* Check to make sure firmware is correct length. */
545 if(lp->board==DAYNA && ltf->length!=5983)
546 {
547 printk(KERN_WARNING "%s: Firmware is not length of FFDRV.BIN.\n", dev->name);
548 return;
549 }
550 if(lp->board==TANGENT && ltf->length!=2501)
551 {
552 printk(KERN_WARNING "%s: Firmware is not length of DRVCODE.BIN.\n", dev->name);
553 return;
554 }
555
556 if(lp->board==DAYNA)
557 {
558 /*
559 * We must wait for a status response
560 * with the DAYNA board.
561 */
562 while(++i<65536)
563 {
564 if((inb(ioaddr+DAYNA_CARD_STATUS)&3)==1)
565 break;
566 }
567
568 if(i==65536)
569 return;
570 }
571
572 /*
573 * Upload the firmware and kick. Byte-by-byte works nicely here.
574 */
575 i=0;
576 length = ltf->length;
577 while(length--)
578 {
579 outb(ltf->data[i], ioaddr);
580 i++;
581 }
582
583 if(cops_debug > 1)
584 printk("%s: Uploaded firmware - %d bytes of %d bytes.\n",
585 dev->name, i, ltf->length);
586
587 if(lp->board==DAYNA) /* Tell Dayna to run the firmware code. */
588 outb(1, ioaddr+DAYNA_INT_CARD);
589 else /* Tell Tang to run the firmware code. */
590 inb(ioaddr);
591
592 if(lp->board==TANGENT)
593 {
594 tangent_wait_reset(ioaddr);
595 inb(ioaddr); /* Clear initial ready signal. */
596 }
597}
598
599/*
600 * Get the LocalTalk Nodeid from the card. We can suggest
601 * any nodeid 1-254. The card will try and get that exact
602 * address else we can specify 0 as the nodeid and the card
603 * will autoprobe for a nodeid.
604 */
605static int cops_nodeid (struct net_device *dev, int nodeid)
606{
607 struct cops_local *lp = netdev_priv(dev);
608 int ioaddr = dev->base_addr;
609
610 if(lp->board == DAYNA)
611 {
612 /* Empty any pending adapter responses. */
613 while((inb(ioaddr+DAYNA_CARD_STATUS)&DAYNA_TX_READY)==0)
614 {
615 outb(0, ioaddr+COPS_CLEAR_INT); /* Clear interrupts. */
616 if((inb(ioaddr+DAYNA_CARD_STATUS)&0x03)==DAYNA_RX_REQUEST)
617 cops_rx(dev); /* Kick any packets waiting. */
618 schedule();
619 }
620
621 outb(2, ioaddr); /* Output command packet length as 2. */
622 outb(0, ioaddr);
623 outb(LAP_INIT, ioaddr); /* Send LAP_INIT command byte. */
624 outb(nodeid, ioaddr); /* Suggest node address. */
625 }
626
627 if(lp->board == TANGENT)
628 {
629 /* Empty any pending adapter responses. */
630 while(inb(ioaddr+TANG_CARD_STATUS)&TANG_RX_READY)
631 {
632 outb(0, ioaddr+COPS_CLEAR_INT); /* Clear interrupt. */
633 cops_rx(dev); /* Kick out packets waiting. */
634 schedule();
635 }
636
637 /* Not sure what Tangent does if nodeid picked is used. */
638 if(nodeid == 0) /* Seed. */
639 nodeid = jiffies&0xFF; /* Get a random try */
640 outb(2, ioaddr); /* Command length LSB */
641 outb(0, ioaddr); /* Command length MSB */
642 outb(LAP_INIT, ioaddr); /* Send LAP_INIT byte */
643 outb(nodeid, ioaddr); /* LAP address hint. */
644 outb(0xFF, ioaddr); /* Int. level to use */
645 }
646
647 lp->node_acquire=0; /* Set nodeid holder to 0. */
648 while(lp->node_acquire==0) /* Get *True* nodeid finally. */
649 {
650 outb(0, ioaddr+COPS_CLEAR_INT); /* Clear any interrupt. */
651
652 if(lp->board == DAYNA)
653 {
654 if((inb(ioaddr+DAYNA_CARD_STATUS)&0x03)==DAYNA_RX_REQUEST)
655 cops_rx(dev); /* Grab the nodeid put in lp->node_acquire. */
656 }
657 if(lp->board == TANGENT)
658 {
659 if(inb(ioaddr+TANG_CARD_STATUS)&TANG_RX_READY)
660 cops_rx(dev); /* Grab the nodeid put in lp->node_acquire. */
661 }
662 schedule();
663 }
664
665 if(cops_debug > 1)
666 printk(KERN_DEBUG "%s: Node ID %d has been acquired.\n",
667 dev->name, lp->node_acquire);
668
669 lp->nodeid=1; /* Set got nodeid to 1. */
670
671 return 0;
672}
673
674/*
675 * Poll the Tangent type cards to see if we have work.
676 */
677
678static void cops_poll(struct timer_list *unused)
679{
680 int ioaddr, status;
681 int boguscount = 0;
682 struct net_device *dev = cops_timer_dev;
683
684 del_timer(&cops_timer);
685
686 if(dev == NULL)
687 return; /* We've been downed */
688
689 ioaddr = dev->base_addr;
690 do {
691 status=inb(ioaddr+TANG_CARD_STATUS);
692 if(status & TANG_RX_READY)
693 cops_rx(dev);
694 if(status & TANG_TX_READY)
695 netif_wake_queue(dev);
696 status = inb(ioaddr+TANG_CARD_STATUS);
697 } while((++boguscount < 20) && (status&(TANG_RX_READY|TANG_TX_READY)));
698
699 /* poll 20 times per second */
700 cops_timer.expires = jiffies + HZ/20;
701 add_timer(&cops_timer);
702}
703
704/*
705 * The typical workload of the driver:
706 * Handle the network interface interrupts.
707 */
708static irqreturn_t cops_interrupt(int irq, void *dev_id)
709{
710 struct net_device *dev = dev_id;
711 struct cops_local *lp;
712 int ioaddr, status;
713 int boguscount = 0;
714
715 ioaddr = dev->base_addr;
716 lp = netdev_priv(dev);
717
718 if(lp->board==DAYNA)
719 {
720 do {
721 outb(0, ioaddr + COPS_CLEAR_INT);
722 status=inb(ioaddr+DAYNA_CARD_STATUS);
723 if((status&0x03)==DAYNA_RX_REQUEST)
724 cops_rx(dev);
725 netif_wake_queue(dev);
726 } while(++boguscount < 20);
727 }
728 else
729 {
730 do {
731 status=inb(ioaddr+TANG_CARD_STATUS);
732 if(status & TANG_RX_READY)
733 cops_rx(dev);
734 if(status & TANG_TX_READY)
735 netif_wake_queue(dev);
736 status=inb(ioaddr+TANG_CARD_STATUS);
737 } while((++boguscount < 20) && (status&(TANG_RX_READY|TANG_TX_READY)));
738 }
739
740 return IRQ_HANDLED;
741}
742
743/*
744 * We have a good packet(s), get it/them out of the buffers.
745 */
746static void cops_rx(struct net_device *dev)
747{
748 int pkt_len = 0;
749 int rsp_type = 0;
750 struct sk_buff *skb = NULL;
751 struct cops_local *lp = netdev_priv(dev);
752 int ioaddr = dev->base_addr;
753 int boguscount = 0;
754 unsigned long flags;
755
756
757 spin_lock_irqsave(&lp->lock, flags);
758
759 if(lp->board==DAYNA)
760 {
761 outb(0, ioaddr); /* Send out Zero length. */
762 outb(0, ioaddr);
763 outb(DATA_READ, ioaddr); /* Send read command out. */
764
765 /* Wait for DMA to turn around. */
766 while(++boguscount<1000000)
767 {
768 barrier();
769 if((inb(ioaddr+DAYNA_CARD_STATUS)&0x03)==DAYNA_RX_READY)
770 break;
771 }
772
773 if(boguscount==1000000)
774 {
775 printk(KERN_WARNING "%s: DMA timed out.\n",dev->name);
776 spin_unlock_irqrestore(&lp->lock, flags);
777 return;
778 }
779 }
780
781 /* Get response length. */
782 pkt_len = inb(ioaddr);
783 pkt_len |= (inb(ioaddr) << 8);
784 /* Input IO code. */
785 rsp_type=inb(ioaddr);
786
787 /* Malloc up new buffer. */
788 skb = dev_alloc_skb(pkt_len);
789 if(skb == NULL)
790 {
791 printk(KERN_WARNING "%s: Memory squeeze, dropping packet.\n",
792 dev->name);
793 dev->stats.rx_dropped++;
794 while(pkt_len--) /* Discard packet */
795 inb(ioaddr);
796 spin_unlock_irqrestore(&lp->lock, flags);
797 return;
798 }
799 skb->dev = dev;
800 skb_put(skb, pkt_len);
801 skb->protocol = htons(ETH_P_LOCALTALK);
802
803 insb(ioaddr, skb->data, pkt_len); /* Eat the Data */
804
805 if(lp->board==DAYNA)
806 outb(1, ioaddr+DAYNA_INT_CARD); /* Interrupt the card */
807
808 spin_unlock_irqrestore(&lp->lock, flags); /* Restore interrupts. */
809
810 /* Check for bad response length */
811 if(pkt_len < 0 || pkt_len > MAX_LLAP_SIZE)
812 {
813 printk(KERN_WARNING "%s: Bad packet length of %d bytes.\n",
814 dev->name, pkt_len);
815 dev->stats.tx_errors++;
816 dev_kfree_skb_any(skb);
817 return;
818 }
819
820 /* Set nodeid and then get out. */
821 if(rsp_type == LAP_INIT_RSP)
822 { /* Nodeid taken from received packet. */
823 lp->node_acquire = skb->data[0];
824 dev_kfree_skb_any(skb);
825 return;
826 }
827
828 /* One last check to make sure we have a good packet. */
829 if(rsp_type != LAP_RESPONSE)
830 {
831 printk(KERN_WARNING "%s: Bad packet type %d.\n", dev->name, rsp_type);
832 dev->stats.tx_errors++;
833 dev_kfree_skb_any(skb);
834 return;
835 }
836
837 skb_reset_mac_header(skb); /* Point to entire packet. */
838 skb_pull(skb,3);
839 skb_reset_transport_header(skb); /* Point to data (Skip header). */
840
841 /* Update the counters. */
842 dev->stats.rx_packets++;
843 dev->stats.rx_bytes += skb->len;
844
845 /* Send packet to a higher place. */
846 netif_rx(skb);
847}
848
849static void cops_timeout(struct net_device *dev, unsigned int txqueue)
850{
851 struct cops_local *lp = netdev_priv(dev);
852 int ioaddr = dev->base_addr;
853
854 dev->stats.tx_errors++;
855 if(lp->board==TANGENT)
856 {
857 if((inb(ioaddr+TANG_CARD_STATUS)&TANG_TX_READY)==0)
858 printk(KERN_WARNING "%s: No TX complete interrupt.\n", dev->name);
859 }
860 printk(KERN_WARNING "%s: Transmit timed out.\n", dev->name);
861 cops_jumpstart(dev); /* Restart the card. */
862 netif_trans_update(dev); /* prevent tx timeout */
863 netif_wake_queue(dev);
864}
865
866
867/*
868 * Make the card transmit a LocalTalk packet.
869 */
870
871static netdev_tx_t cops_send_packet(struct sk_buff *skb,
872 struct net_device *dev)
873{
874 struct cops_local *lp = netdev_priv(dev);
875 int ioaddr = dev->base_addr;
876 unsigned long flags;
877
878 /*
879 * Block a timer-based transmit from overlapping.
880 */
881
882 netif_stop_queue(dev);
883
884 spin_lock_irqsave(&lp->lock, flags);
885 if(lp->board == DAYNA) /* Wait for adapter transmit buffer. */
886 while((inb(ioaddr+DAYNA_CARD_STATUS)&DAYNA_TX_READY)==0)
887 cpu_relax();
888 if(lp->board == TANGENT) /* Wait for adapter transmit buffer. */
889 while((inb(ioaddr+TANG_CARD_STATUS)&TANG_TX_READY)==0)
890 cpu_relax();
891
892 /* Output IO length. */
893 outb(skb->len, ioaddr);
894 outb(skb->len >> 8, ioaddr);
895
896 /* Output IO code. */
897 outb(LAP_WRITE, ioaddr);
898
899 if(lp->board == DAYNA) /* Check the transmit buffer again. */
900 while((inb(ioaddr+DAYNA_CARD_STATUS)&DAYNA_TX_READY)==0);
901
902 outsb(ioaddr, skb->data, skb->len); /* Send out the data. */
903
904 if(lp->board==DAYNA) /* Dayna requires you kick the card */
905 outb(1, ioaddr+DAYNA_INT_CARD);
906
907 spin_unlock_irqrestore(&lp->lock, flags); /* Restore interrupts. */
908
909 /* Done sending packet, update counters and cleanup. */
910 dev->stats.tx_packets++;
911 dev->stats.tx_bytes += skb->len;
912 dev_kfree_skb (skb);
913 return NETDEV_TX_OK;
914}
915
916/*
917 * Dummy function to keep the Appletalk layer happy.
918 */
919
920static void set_multicast_list(struct net_device *dev)
921{
922 if(cops_debug >= 3)
923 printk("%s: set_multicast_list executed\n", dev->name);
924}
925
926/*
927 * System ioctls for the COPS LocalTalk card.
928 */
929
930static int cops_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
931{
932 struct cops_local *lp = netdev_priv(dev);
933 struct sockaddr_at *sa = (struct sockaddr_at *)&ifr->ifr_addr;
934 struct atalk_addr *aa = &lp->node_addr;
935
936 switch(cmd)
937 {
938 case SIOCSIFADDR:
939 /* Get and set the nodeid and network # atalkd wants. */
940 cops_nodeid(dev, sa->sat_addr.s_node);
941 aa->s_net = sa->sat_addr.s_net;
942 aa->s_node = lp->node_acquire;
943
944 /* Set broardcast address. */
945 dev->broadcast[0] = 0xFF;
946
947 /* Set hardware address. */
948 dev->addr_len = 1;
949 dev_addr_set(dev, &aa->s_node);
950 return 0;
951
952 case SIOCGIFADDR:
953 sa->sat_addr.s_net = aa->s_net;
954 sa->sat_addr.s_node = aa->s_node;
955 return 0;
956
957 default:
958 return -EOPNOTSUPP;
959 }
960}
961
962/*
963 * The inverse routine to cops_open().
964 */
965
966static int cops_close(struct net_device *dev)
967{
968 struct cops_local *lp = netdev_priv(dev);
969
970 /* If we were running polled, yank the timer.
971 */
972 if(lp->board==TANGENT && dev->irq==0)
973 del_timer(&cops_timer);
974
975 netif_stop_queue(dev);
976 return 0;
977}
978
979
980#ifdef MODULE
981static struct net_device *cops_dev;
982
983MODULE_LICENSE("GPL");
984module_param_hw(io, int, ioport, 0);
985module_param_hw(irq, int, irq, 0);
986module_param_hw(board_type, int, other, 0);
987
988static int __init cops_module_init(void)
989{
990 if (io == 0)
991 printk(KERN_WARNING "%s: You shouldn't autoprobe with insmod\n",
992 cardname);
993 cops_dev = cops_probe(-1);
994 return PTR_ERR_OR_ZERO(cops_dev);
995}
996
997static void __exit cops_module_exit(void)
998{
999 unregister_netdev(cops_dev);
1000 cleanup_card(cops_dev);
1001 free_netdev(cops_dev);
1002}
1003module_init(cops_module_init);
1004module_exit(cops_module_exit);
1005#endif /* MODULE */