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[NET]: Move hardware header operations out of netdevice.
[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>
72
73#include <asm/system.h>
74#include <asm/io.h>
75#include <asm/dma.h>
76
77#include "cops.h" /* Our Stuff */
78#include "cops_ltdrv.h" /* Firmware code for Tangent type cards. */
79#include "cops_ffdrv.h" /* Firmware code for Dayna type cards. */
80
81/*
82 * The name of the card. Is used for messages and in the requests for
83 * io regions, irqs and dma channels
84 */
85
86static const char *cardname = "cops";
87
88#ifdef CONFIG_COPS_DAYNA
89static int board_type = DAYNA; /* Module exported */
90#else
91static int board_type = TANGENT;
92#endif
93
94static int io = 0x240; /* Default IO for Dayna */
95static int irq = 5; /* Default IRQ */
96
97/*
98 * COPS Autoprobe information.
99 * Right now if port address is right but IRQ is not 5 this will
100 * return a 5 no matter what since we will still get a status response.
101 * Need one more additional check to narrow down after we have gotten
102 * the ioaddr. But since only other possible IRQs is 3 and 4 so no real
103 * hurry on this. I *STRONGLY* recommend using IRQ 5 for your card with
104 * this driver.
105 *
106 * This driver has 2 modes and they are: Dayna mode and Tangent mode.
107 * Each mode corresponds with the type of card. It has been found
108 * that there are 2 main types of cards and all other cards are
109 * the same and just have different names or only have minor differences
110 * such as more IO ports. As this driver is tested it will
111 * become more clear on exactly what cards are supported. The driver
112 * defaults to using Dayna mode. To change the drivers mode, simply
113 * select Dayna or Tangent mode when configuring the kernel.
114 *
115 * This driver should support:
116 * TANGENT driver mode:
117 * Tangent ATB-II, Novell NL-1000, Daystar Digital LT-200,
118 * COPS LT-1
119 * DAYNA driver mode:
120 * Dayna DL2000/DaynaTalk PC (Half Length), COPS LT-95,
121 * Farallon PhoneNET PC III, Farallon PhoneNET PC II
122 * Other cards possibly supported mode unkown though:
123 * Dayna DL2000 (Full length), COPS LT/M (Micro-Channel)
124 *
125 * Cards NOT supported by this driver but supported by the ltpc.c
126 * driver written by Bradford W. Johnson <johns393@maroon.tc.umn.edu>
127 * Farallon PhoneNET PC
128 * Original Apple LocalTalk PC card
129 *
130 * N.B.
131 *
132 * The Daystar Digital LT200 boards do not support interrupt-driven
133 * IO. You must specify 'irq=0xff' as a module parameter to invoke
134 * polled mode. I also believe that the port probing logic is quite
135 * dangerous at best and certainly hopeless for a polled card. Best to
136 * specify both. - Steve H.
137 *
138 */
139
140/*
141 * Zero terminated list of IO ports to probe.
142 */
143
144static unsigned int ports[] = {
145 0x240, 0x340, 0x200, 0x210, 0x220, 0x230, 0x260,
146 0x2A0, 0x300, 0x310, 0x320, 0x330, 0x350, 0x360,
147 0
148};
149
150/*
151 * Zero terminated list of IRQ ports to probe.
152 */
153
154static int cops_irqlist[] = {
155 5, 4, 3, 0
156};
157
158static struct timer_list cops_timer;
159
160/* use 0 for production, 1 for verification, 2 for debug, 3 for verbose debug */
161#ifndef COPS_DEBUG
162#define COPS_DEBUG 1
163#endif
164static unsigned int cops_debug = COPS_DEBUG;
165
166/* The number of low I/O ports used by the card. */
167#define COPS_IO_EXTENT 8
168
169/* Information that needs to be kept for each board. */
170
171struct cops_local
172{
173 struct net_device_stats stats;
174 int board; /* Holds what board type is. */
175 int nodeid; /* Set to 1 once have nodeid. */
176 unsigned char node_acquire; /* Node ID when acquired. */
177 struct atalk_addr node_addr; /* Full node address */
178 spinlock_t lock; /* RX/TX lock */
179};
180
181/* Index to functions, as function prototypes. */
182static int cops_probe1 (struct net_device *dev, int ioaddr);
183static int cops_irq (int ioaddr, int board);
184
185static int cops_open (struct net_device *dev);
186static int cops_jumpstart (struct net_device *dev);
187static void cops_reset (struct net_device *dev, int sleep);
188static void cops_load (struct net_device *dev);
189static int cops_nodeid (struct net_device *dev, int nodeid);
190
7d12e780 191static irqreturn_t cops_interrupt (int irq, void *dev_id);
1da177e4
LT		 192static void cops_poll (unsigned long ltdev);
193static void cops_timeout(struct net_device *dev);
194static void cops_rx (struct net_device *dev);
195static int cops_send_packet (struct sk_buff *skb, struct net_device *dev);
196static void set_multicast_list (struct net_device *dev);
1da177e4
LT		 197static int cops_ioctl (struct net_device *dev, struct ifreq *rq, int cmd);
198static int cops_close (struct net_device *dev);
199static struct net_device_stats *cops_get_stats (struct net_device *dev);
200
201static void cleanup_card(struct net_device *dev)
202{
203 if (dev->irq)
204 free_irq(dev->irq, dev);
205 release_region(dev->base_addr, COPS_IO_EXTENT);
206}
207
208/*
209 * Check for a network adaptor of this type, and return '0' iff one exists.
210 * If dev->base_addr == 0, probe all likely locations.
211 * If dev->base_addr in [1..0x1ff], always return failure.
212 * otherwise go with what we pass in.
213 */
214struct net_device * __init cops_probe(int unit)
215{
216 struct net_device *dev;
217 unsigned *port;
218 int base_addr;
219 int err = 0;
220
3ef4e9a8 221 dev = alloc_ltalkdev(sizeof(struct cops_local));
1da177e4
LT		 222 if (!dev)
223 return ERR_PTR(-ENOMEM);
224
225 if (unit >= 0) {
226 sprintf(dev->name, "lt%d", unit);
227 netdev_boot_setup_check(dev);
228 irq = dev->irq;
229 base_addr = dev->base_addr;
230 } else {
231 base_addr = dev->base_addr = io;
232 }
233
1da177e4
LT		 234 if (base_addr > 0x1ff) { /* Check a single specified location. */
235 err = cops_probe1(dev, base_addr);
236 } else if (base_addr != 0) { /* Don't probe at all. */
237 err = -ENXIO;
238 } else {
239 /* FIXME Does this really work for cards which generate irq?
240 * It's definitely N.G. for polled Tangent. sh
241 * Dayna cards don't autoprobe well at all, but if your card is
242 * at IRQ 5 & IO 0x240 we find it every time. ;) JS
243 */
244 for (port = ports; *port && cops_probe1(dev, *port) < 0; port++)
245 ;
246 if (!*port)
247 err = -ENODEV;
248 }
249 if (err)
250 goto out;
251 err = register_netdev(dev);
252 if (err)
253 goto out1;
254 return dev;
255out1:
256 cleanup_card(dev);
257out:
258 free_netdev(dev);
259 return ERR_PTR(err);
260}
261
262/*
263 * This is the real probe routine. Linux has a history of friendly device
264 * probes on the ISA bus. A good device probes avoids doing writes, and
265 * verifies that the correct device exists and functions.
266 */
267static int __init cops_probe1(struct net_device *dev, int ioaddr)
268{
269 struct cops_local *lp;
270 static unsigned version_printed;
271 int board = board_type;
272 int retval;
273
274 if(cops_debug && version_printed++ == 0)
275 printk("%s", version);
276
277 /* Grab the region so no one else tries to probe our ioports. */
278 if (!request_region(ioaddr, COPS_IO_EXTENT, dev->name))
279 return -EBUSY;
280
281 /*
282 * Since this board has jumpered interrupts, allocate the interrupt
283 * vector now. There is no point in waiting since no other device
284 * can use the interrupt, and this marks the irq as busy. Jumpered
285 * interrupts are typically not reported by the boards, and we must
286 * used AutoIRQ to find them.
287 */
288 dev->irq = irq;
289 switch (dev->irq)
290 {
291 case 0:
292 /* COPS AutoIRQ routine */
293 dev->irq = cops_irq(ioaddr, board);
294 if (dev->irq)
295 break;
296 /* No IRQ found on this port, fallthrough */
297 case 1:
298 retval = -EINVAL;
299 goto err_out;
300
301 /* Fixup for users that don't know that IRQ 2 is really
302 * IRQ 9, or don't know which one to set.
303 */
304 case 2:
305 dev->irq = 9;
306 break;
307
308 /* Polled operation requested. Although irq of zero passed as
309 * a parameter tells the init routines to probe, we'll
310 * overload it to denote polled operation at runtime.
311 */
312 case 0xff:
313 dev->irq = 0;
314 break;
315
316 default:
317 break;
318 }
319
320 /* Reserve any actual interrupt. */
321 if (dev->irq) {
322 retval = request_irq(dev->irq, &cops_interrupt, 0, dev->name, dev);
323 if (retval)
324 goto err_out;
325 }
326
327 dev->base_addr = ioaddr;
328
329 lp = netdev_priv(dev);
1da177e4
LT		 330 spin_lock_init(&lp->lock);
331
332 /* Copy local board variable to lp struct. */
333 lp->board = board;
334
335 dev->hard_start_xmit = cops_send_packet;
336 dev->tx_timeout = cops_timeout;
337 dev->watchdog_timeo = HZ * 2;
3b04ddde 338
1da177e4
LT		 339 dev->get_stats = cops_get_stats;
340 dev->open = cops_open;
341 dev->stop = cops_close;
342 dev->do_ioctl = cops_ioctl;
343 dev->set_multicast_list = set_multicast_list;
344 dev->mc_list = NULL;
345
346 /* Tell the user where the card is and what mode we're in. */
347 if(board==DAYNA)
348 printk("%s: %s at %#3x, using IRQ %d, in Dayna mode.\n",
349 dev->name, cardname, ioaddr, dev->irq);
350 if(board==TANGENT) {
351 if(dev->irq)
352 printk("%s: %s at %#3x, IRQ %d, in Tangent mode\n",
353 dev->name, cardname, ioaddr, dev->irq);
354 else
355 printk("%s: %s at %#3x, using polled IO, in Tangent mode.\n",
356 dev->name, cardname, ioaddr);
357
358 }
359 return 0;
360
361err_out:
362 release_region(ioaddr, COPS_IO_EXTENT);
363 return retval;
364}
365
366static int __init cops_irq (int ioaddr, int board)
367{ /*
368 * This does not use the IRQ to determine where the IRQ is. We just
369 * assume that when we get a correct status response that it's the IRQ.
370 * This really just verifies the IO port but since we only have access
371 * to such a small number of IRQs (5, 4, 3) this is not bad.
372 * This will probably not work for more than one card.
373 */
374 int irqaddr=0;
375 int i, x, status;
376
377 if(board==DAYNA)
378 {
379 outb(0, ioaddr+DAYNA_RESET);
380 inb(ioaddr+DAYNA_RESET);
381 mdelay(333);
382 }
383 if(board==TANGENT)
384 {
385 inb(ioaddr);
386 outb(0, ioaddr);
387 outb(0, ioaddr+TANG_RESET);
388 }
389
390 for(i=0; cops_irqlist[i] !=0; i++)
391 {
392 irqaddr = cops_irqlist[i];
393 for(x = 0xFFFF; x>0; x --) /* wait for response */
394 {
395 if(board==DAYNA)
396 {
397 status = (inb(ioaddr+DAYNA_CARD_STATUS)&3);
398 if(status == 1)
399 return irqaddr;
400 }
401 if(board==TANGENT)
402 {
403 if((inb(ioaddr+TANG_CARD_STATUS)& TANG_TX_READY) !=0)
404 return irqaddr;
405 }
406 }
407 }
408 return 0; /* no IRQ found */
409}
410
411/*
412 * Open/initialize the board. This is called (in the current kernel)
413 * sometime after booting when the 'ifconfig' program is run.
414 */
415static int cops_open(struct net_device *dev)
416{
417 struct cops_local *lp = netdev_priv(dev);
418
419 if(dev->irq==0)
420 {
421 /*
422 * I don't know if the Dayna-style boards support polled
423 * operation. For now, only allow it for Tangent.
424 */
425 if(lp->board==TANGENT) /* Poll 20 times per second */
426 {
427 init_timer(&cops_timer);
428 cops_timer.function = cops_poll;
429 cops_timer.data = (unsigned long)dev;
430 cops_timer.expires = jiffies + HZ/20;
431 add_timer(&cops_timer);
432 }
433 else
434 {
435 printk(KERN_WARNING "%s: No irq line set\n", dev->name);
436 return -EAGAIN;
437 }
438 }
439
440 cops_jumpstart(dev); /* Start the card up. */
441
442 netif_start_queue(dev);
443 return 0;
444}
445
446/*
447 * This allows for a dynamic start/restart of the entire card.
448 */
449static int cops_jumpstart(struct net_device *dev)
450{
451 struct cops_local *lp = netdev_priv(dev);
452
453 /*
454 * Once the card has the firmware loaded and has acquired
455 * the nodeid, if it is reset it will lose it all.
456 */
457 cops_reset(dev,1); /* Need to reset card before load firmware. */
458 cops_load(dev); /* Load the firmware. */
459
460 /*
461 * If atalkd already gave us a nodeid we will use that
462 * one again, else we wait for atalkd to give us a nodeid
463 * in cops_ioctl. This may cause a problem if someone steals
464 * our nodeid while we are resetting.
465 */
466 if(lp->nodeid == 1)
467 cops_nodeid(dev,lp->node_acquire);
468
469 return 0;
470}
471
472static void tangent_wait_reset(int ioaddr)
473{
474 int timeout=0;
475
476 while(timeout++ < 5 && (inb(ioaddr+TANG_CARD_STATUS)&TANG_TX_READY)==0)
477 mdelay(1); /* Wait 1 second */
478}
479
480/*
481 * Reset the LocalTalk board.
482 */
483static void cops_reset(struct net_device *dev, int sleep)
484{
485 struct cops_local *lp = netdev_priv(dev);
486 int ioaddr=dev->base_addr;
487
488 if(lp->board==TANGENT)
489 {
490 inb(ioaddr); /* Clear request latch. */
491 outb(0,ioaddr); /* Clear the TANG_TX_READY flop. */
492 outb(0, ioaddr+TANG_RESET); /* Reset the adapter. */
493
494 tangent_wait_reset(ioaddr);
495 outb(0, ioaddr+TANG_CLEAR_INT);
496 }
497 if(lp->board==DAYNA)
498 {
499 outb(0, ioaddr+DAYNA_RESET); /* Assert the reset port */
500 inb(ioaddr+DAYNA_RESET); /* Clear the reset */
501 if(sleep)
502 {
503 long snap=jiffies;
504
505 /* Let card finish initializing, about 1/3 second */
506 while(jiffies-snap<HZ/3)
507 schedule();
508 }
509 else
510 mdelay(333);
511 }
512 netif_wake_queue(dev);
513 return;
514}
515
516static void cops_load (struct net_device *dev)
517{
518 struct ifreq ifr;
519 struct ltfirmware *ltf= (struct ltfirmware *)&ifr.ifr_ifru;
520 struct cops_local *lp = netdev_priv(dev);
521 int ioaddr=dev->base_addr;
522 int length, i = 0;
523
524 strcpy(ifr.ifr_name,"lt0");
525
526 /* Get card's firmware code and do some checks on it. */
527#ifdef CONFIG_COPS_DAYNA
528 if(lp->board==DAYNA)
529 {
530 ltf->length=sizeof(ffdrv_code);
531 ltf->data=ffdrv_code;
532 }
533 else
534#endif
535#ifdef CONFIG_COPS_TANGENT
536 if(lp->board==TANGENT)
537 {
538 ltf->length=sizeof(ltdrv_code);
539 ltf->data=ltdrv_code;
540 }
541 else
542#endif
543 {
544 printk(KERN_INFO "%s; unsupported board type.\n", dev->name);
545 return;
546 }
547
548 /* Check to make sure firmware is correct length. */
549 if(lp->board==DAYNA && ltf->length!=5983)
550 {
551 printk(KERN_WARNING "%s: Firmware is not length of FFDRV.BIN.\n", dev->name);
552 return;
553 }
554 if(lp->board==TANGENT && ltf->length!=2501)
555 {
556 printk(KERN_WARNING "%s: Firmware is not length of DRVCODE.BIN.\n", dev->name);
557 return;
558 }
559
560 if(lp->board==DAYNA)
561 {
562 /*
563 * We must wait for a status response
564 * with the DAYNA board.
565 */
566 while(++i<65536)
567 {
568 if((inb(ioaddr+DAYNA_CARD_STATUS)&3)==1)
569 break;
570 }
571
572 if(i==65536)
573 return;
574 }
575
576 /*
577 * Upload the firmware and kick. Byte-by-byte works nicely here.
578 */
579 i=0;
580 length = ltf->length;
581 while(length--)
582 {
583 outb(ltf->data[i], ioaddr);
584 i++;
585 }
586
587 if(cops_debug > 1)
588 printk("%s: Uploaded firmware - %d bytes of %d bytes.\n",
589 dev->name, i, ltf->length);
590
591 if(lp->board==DAYNA) /* Tell Dayna to run the firmware code. */
592 outb(1, ioaddr+DAYNA_INT_CARD);
593 else /* Tell Tang to run the firmware code. */
594 inb(ioaddr);
595
596 if(lp->board==TANGENT)
597 {
598 tangent_wait_reset(ioaddr);
599 inb(ioaddr); /* Clear initial ready signal. */
600 }
601
602 return;
603}
604
605/*
606 * Get the LocalTalk Nodeid from the card. We can suggest
607 * any nodeid 1-254. The card will try and get that exact
608 * address else we can specify 0 as the nodeid and the card
609 * will autoprobe for a nodeid.
610 */
611static int cops_nodeid (struct net_device *dev, int nodeid)
612{
613 struct cops_local *lp = netdev_priv(dev);
614 int ioaddr = dev->base_addr;
615
616 if(lp->board == DAYNA)
617 {
618 /* Empty any pending adapter responses. */
619 while((inb(ioaddr+DAYNA_CARD_STATUS)&DAYNA_TX_READY)==0)
620 {
621 outb(0, ioaddr+COPS_CLEAR_INT); /* Clear interrupts. */
622 if((inb(ioaddr+DAYNA_CARD_STATUS)&0x03)==DAYNA_RX_REQUEST)
623 cops_rx(dev); /* Kick any packets waiting. */
624 schedule();
625 }
626
627 outb(2, ioaddr); /* Output command packet length as 2. */
628 outb(0, ioaddr);
629 outb(LAP_INIT, ioaddr); /* Send LAP_INIT command byte. */
630 outb(nodeid, ioaddr); /* Suggest node address. */
631 }
632
633 if(lp->board == TANGENT)
634 {
635 /* Empty any pending adapter responses. */
636 while(inb(ioaddr+TANG_CARD_STATUS)&TANG_RX_READY)
637 {
638 outb(0, ioaddr+COPS_CLEAR_INT); /* Clear interrupt. */
639 cops_rx(dev); /* Kick out packets waiting. */
640 schedule();
641 }
642
643 /* Not sure what Tangent does if nodeid picked is used. */
644 if(nodeid == 0) /* Seed. */
645 nodeid = jiffies&0xFF; /* Get a random try */
646 outb(2, ioaddr); /* Command length LSB */
647 outb(0, ioaddr); /* Command length MSB */
648 outb(LAP_INIT, ioaddr); /* Send LAP_INIT byte */
649 outb(nodeid, ioaddr); /* LAP address hint. */
650 outb(0xFF, ioaddr); /* Int. level to use */
651 }
652
653 lp->node_acquire=0; /* Set nodeid holder to 0. */
654 while(lp->node_acquire==0) /* Get *True* nodeid finally. */
655 {
656 outb(0, ioaddr+COPS_CLEAR_INT); /* Clear any interrupt. */
657
658 if(lp->board == DAYNA)
659 {
660 if((inb(ioaddr+DAYNA_CARD_STATUS)&0x03)==DAYNA_RX_REQUEST)
661 cops_rx(dev); /* Grab the nodeid put in lp->node_acquire. */
662 }
663 if(lp->board == TANGENT)
664 {
665 if(inb(ioaddr+TANG_CARD_STATUS)&TANG_RX_READY)
666 cops_rx(dev); /* Grab the nodeid put in lp->node_acquire. */
667 }
668 schedule();
669 }
670
671 if(cops_debug > 1)
672 printk(KERN_DEBUG "%s: Node ID %d has been acquired.\n",
673 dev->name, lp->node_acquire);
674
675 lp->nodeid=1; /* Set got nodeid to 1. */
676
677 return 0;
678}
679
680/*
681 * Poll the Tangent type cards to see if we have work.
682 */
683
684static void cops_poll(unsigned long ltdev)
685{
686 int ioaddr, status;
687 int boguscount = 0;
688
689 struct net_device *dev = (struct net_device *)ltdev;
690
691 del_timer(&cops_timer);
692
693 if(dev == NULL)
694 return; /* We've been downed */
695
696 ioaddr = dev->base_addr;
697 do {
698 status=inb(ioaddr+TANG_CARD_STATUS);
699 if(status & TANG_RX_READY)
700 cops_rx(dev);
701 if(status & TANG_TX_READY)
702 netif_wake_queue(dev);
703 status = inb(ioaddr+TANG_CARD_STATUS);
704 } while((++boguscount < 20) && (status&(TANG_RX_READY|TANG_TX_READY)));
705
706 /* poll 20 times per second */
707 cops_timer.expires = jiffies + HZ/20;
708 add_timer(&cops_timer);
709
710 return;
711}
712
713/*
714 * The typical workload of the driver:
715 * Handle the network interface interrupts.
716 */
7d12e780 717static irqreturn_t cops_interrupt(int irq, void *dev_id)
1da177e4
LT		 718{
719 struct net_device *dev = dev_id;
720 struct cops_local *lp;
721 int ioaddr, status;
722 int boguscount = 0;
723
724 ioaddr = dev->base_addr;
725 lp = netdev_priv(dev);
726
727 if(lp->board==DAYNA)
728 {
729 do {
730 outb(0, ioaddr + COPS_CLEAR_INT);
731 status=inb(ioaddr+DAYNA_CARD_STATUS);
732 if((status&0x03)==DAYNA_RX_REQUEST)
733 cops_rx(dev);
734 netif_wake_queue(dev);
735 } while(++boguscount < 20);
736 }
737 else
738 {
739 do {
740 status=inb(ioaddr+TANG_CARD_STATUS);
741 if(status & TANG_RX_READY)
742 cops_rx(dev);
743 if(status & TANG_TX_READY)
744 netif_wake_queue(dev);
745 status=inb(ioaddr+TANG_CARD_STATUS);
746 } while((++boguscount < 20) && (status&(TANG_RX_READY|TANG_TX_READY)));
747 }
748
749 return IRQ_HANDLED;
750}
751
752/*
753 * We have a good packet(s), get it/them out of the buffers.
754 */
755static void cops_rx(struct net_device *dev)
756{
757 int pkt_len = 0;
758 int rsp_type = 0;
759 struct sk_buff *skb = NULL;
760 struct cops_local *lp = netdev_priv(dev);
761 int ioaddr = dev->base_addr;
762 int boguscount = 0;
763 unsigned long flags;
764
765
766 spin_lock_irqsave(&lp->lock, flags);
767
768 if(lp->board==DAYNA)
769 {
770 outb(0, ioaddr); /* Send out Zero length. */
771 outb(0, ioaddr);
772 outb(DATA_READ, ioaddr); /* Send read command out. */
773
774 /* Wait for DMA to turn around. */
775 while(++boguscount<1000000)
776 {
777 barrier();
778 if((inb(ioaddr+DAYNA_CARD_STATUS)&0x03)==DAYNA_RX_READY)
779 break;
780 }
781
782 if(boguscount==1000000)
783 {
784 printk(KERN_WARNING "%s: DMA timed out.\n",dev->name);
785 spin_unlock_irqrestore(&lp->lock, flags);
786 return;
787 }
788 }
789
790 /* Get response length. */
791 if(lp->board==DAYNA)
792 pkt_len = inb(ioaddr) & 0xFF;
793 else
794 pkt_len = inb(ioaddr) & 0x00FF;
795 pkt_len |= (inb(ioaddr) << 8);
796 /* Input IO code. */
797 rsp_type=inb(ioaddr);
798
799 /* Malloc up new buffer. */
800 skb = dev_alloc_skb(pkt_len);
801 if(skb == NULL)
802 {
803 printk(KERN_WARNING "%s: Memory squeeze, dropping packet.\n",
804 dev->name);
805 lp->stats.rx_dropped++;
806 while(pkt_len--) /* Discard packet */
807 inb(ioaddr);
808 spin_unlock_irqrestore(&lp->lock, flags);
809 return;
810 }
811 skb->dev = dev;
812 skb_put(skb, pkt_len);
813 skb->protocol = htons(ETH_P_LOCALTALK);
814
815 insb(ioaddr, skb->data, pkt_len); /* Eat the Data */
816
817 if(lp->board==DAYNA)
818 outb(1, ioaddr+DAYNA_INT_CARD); /* Interrupt the card */
819
820 spin_unlock_irqrestore(&lp->lock, flags); /* Restore interrupts. */
821
822 /* Check for bad response length */
823 if(pkt_len < 0 || pkt_len > MAX_LLAP_SIZE)
824 {
825 printk(KERN_WARNING "%s: Bad packet length of %d bytes.\n",
826 dev->name, pkt_len);
827 lp->stats.tx_errors++;
828 dev_kfree_skb_any(skb);
829 return;
830 }
831
832 /* Set nodeid and then get out. */
833 if(rsp_type == LAP_INIT_RSP)
834 { /* Nodeid taken from received packet. */
835 lp->node_acquire = skb->data[0];
836 dev_kfree_skb_any(skb);
837 return;
838 }
839
840 /* One last check to make sure we have a good packet. */
841 if(rsp_type != LAP_RESPONSE)
842 {
843 printk(KERN_WARNING "%s: Bad packet type %d.\n", dev->name, rsp_type);
844 lp->stats.tx_errors++;
845 dev_kfree_skb_any(skb);
846 return;
847 }
848
459a98ed 849 skb_reset_mac_header(skb); /* Point to entire packet. */
1da177e4 850 skb_pull(skb,3);
badff6d0 851 skb_reset_transport_header(skb); /* Point to data (Skip header). */
1da177e4
LT		 852
853 /* Update the counters. */
854 lp->stats.rx_packets++;
855 lp->stats.rx_bytes += skb->len;
856
857 /* Send packet to a higher place. */
858 netif_rx(skb);
859 dev->last_rx = jiffies;
860}
861
862static void cops_timeout(struct net_device *dev)
863{
864 struct cops_local *lp = netdev_priv(dev);
865 int ioaddr = dev->base_addr;
866
867 lp->stats.tx_errors++;
868 if(lp->board==TANGENT)
869 {
870 if((inb(ioaddr+TANG_CARD_STATUS)&TANG_TX_READY)==0)
871 printk(KERN_WARNING "%s: No TX complete interrupt.\n", dev->name);
872 }
873 printk(KERN_WARNING "%s: Transmit timed out.\n", dev->name);
874 cops_jumpstart(dev); /* Restart the card. */
875 dev->trans_start = jiffies;
876 netif_wake_queue(dev);
877}
878
879
880/*
881 * Make the card transmit a LocalTalk packet.
882 */
883
884static int cops_send_packet(struct sk_buff *skb, struct net_device *dev)
885{
886 struct cops_local *lp = netdev_priv(dev);
887 int ioaddr = dev->base_addr;
888 unsigned long flags;
889
890 /*
891 * Block a timer-based transmit from overlapping.
892 */
893
894 netif_stop_queue(dev);
895
896 spin_lock_irqsave(&lp->lock, flags);
897 if(lp->board == DAYNA) /* Wait for adapter transmit buffer. */
898 while((inb(ioaddr+DAYNA_CARD_STATUS)&DAYNA_TX_READY)==0)
899 cpu_relax();
900 if(lp->board == TANGENT) /* Wait for adapter transmit buffer. */
901 while((inb(ioaddr+TANG_CARD_STATUS)&TANG_TX_READY)==0)
902 cpu_relax();
903
904 /* Output IO length. */
905 outb(skb->len, ioaddr);
906 if(lp->board == DAYNA)
907 outb(skb->len >> 8, ioaddr);
908 else
909 outb((skb->len >> 8)&0x0FF, ioaddr);
910
911 /* Output IO code. */
912 outb(LAP_WRITE, ioaddr);
913
914 if(lp->board == DAYNA) /* Check the transmit buffer again. */
915 while((inb(ioaddr+DAYNA_CARD_STATUS)&DAYNA_TX_READY)==0);
916
917 outsb(ioaddr, skb->data, skb->len); /* Send out the data. */
918
919 if(lp->board==DAYNA) /* Dayna requires you kick the card */
920 outb(1, ioaddr+DAYNA_INT_CARD);
921
922 spin_unlock_irqrestore(&lp->lock, flags); /* Restore interrupts. */
923
924 /* Done sending packet, update counters and cleanup. */
925 lp->stats.tx_packets++;
926 lp->stats.tx_bytes += skb->len;
927 dev->trans_start = jiffies;
928 dev_kfree_skb (skb);
929 return 0;
930}
931
932/*
933 * Dummy function to keep the Appletalk layer happy.
934 */
935
936static void set_multicast_list(struct net_device *dev)
937{
938 if(cops_debug >= 3)
939 printk("%s: set_multicast_list executed\n", dev->name);
940}
941
1da177e4
LT		 942/*
943 * System ioctls for the COPS LocalTalk card.
944 */
945
946static int cops_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
947{
948 struct cops_local *lp = netdev_priv(dev);
949 struct sockaddr_at *sa = (struct sockaddr_at *)&ifr->ifr_addr;
950 struct atalk_addr *aa = (struct atalk_addr *)&lp->node_addr;
951
952 switch(cmd)
953 {
954 case SIOCSIFADDR:
955 /* Get and set the nodeid and network # atalkd wants. */
956 cops_nodeid(dev, sa->sat_addr.s_node);
957 aa->s_net = sa->sat_addr.s_net;
958 aa->s_node = lp->node_acquire;
959
960 /* Set broardcast address. */
961 dev->broadcast[0] = 0xFF;
962
963 /* Set hardware address. */
964 dev->dev_addr[0] = aa->s_node;
965 dev->addr_len = 1;
966 return 0;
967
968 case SIOCGIFADDR:
969 sa->sat_addr.s_net = aa->s_net;
970 sa->sat_addr.s_node = aa->s_node;
971 return 0;
972
973 default:
974 return -EOPNOTSUPP;
975 }
976}
977
978/*
979 * The inverse routine to cops_open().
980 */
981
982static int cops_close(struct net_device *dev)
983{
984 struct cops_local *lp = netdev_priv(dev);
985
986 /* If we were running polled, yank the timer.
987 */
988 if(lp->board==TANGENT && dev->irq==0)
989 del_timer(&cops_timer);
990
991 netif_stop_queue(dev);
992 return 0;
993}
994
995/*
996 * Get the current statistics.
997 * This may be called with the card open or closed.
998 */
999static struct net_device_stats *cops_get_stats(struct net_device *dev)
1000{
1001 struct cops_local *lp = netdev_priv(dev);
1002 return &lp->stats;
1003}
1004
1005#ifdef MODULE
1006static struct net_device *cops_dev;
1007
1008MODULE_LICENSE("GPL");
1009module_param(io, int, 0);
1010module_param(irq, int, 0);
1011module_param(board_type, int, 0);
1012
5f3bc456 1013int __init init_module(void)
1da177e4
LT		 1014{
1015 if (io == 0)
1016 printk(KERN_WARNING "%s: You shouldn't autoprobe with insmod\n",
1017 cardname);
1018 cops_dev = cops_probe(-1);
1019 if (IS_ERR(cops_dev))
1020 return PTR_ERR(cops_dev);
1021 return 0;
1022}
1023
afc8eb46 1024void __exit cleanup_module(void)
1da177e4
LT		 1025{
1026 unregister_netdev(cops_dev);
1027 cleanup_card(cops_dev);
1028 free_netdev(cops_dev);
1029}
1030#endif /* MODULE */
1031
1032/*
1033 * Local variables:
1034 * compile-command: "gcc -DMODVERSIONS -DMODULE -D__KERNEL__ -Wall -Wstrict-prototypes -O2 -c cops.c"
1035 * c-basic-offset: 4
1036 * c-file-offsets: ((substatement-open . 0))
1037 * End:
1038 */
Linux kernel - Deliverables
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