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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 18:20:36 -0400
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 18:20:36 -0400
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /drivers/net/appletalk/cops.c
Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'drivers/net/appletalk/cops.c')
-rw-r--r--drivers/net/appletalk/cops.c1059
1 files changed, 1059 insertions, 0 deletions
diff --git a/drivers/net/appletalk/cops.c b/drivers/net/appletalk/cops.c
new file mode 100644
index 00000000000..2161c2d585f
--- /dev/null
+++ b/drivers/net/appletalk/cops.c
@@ -0,0 +1,1059 @@
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
51#include <linux/config.h>
52#include <linux/module.h>
53#include <linux/kernel.h>
54#include <linux/types.h>
55#include <linux/fcntl.h>
56#include <linux/interrupt.h>
57#include <linux/ptrace.h>
58#include <linux/ioport.h>
59#include <linux/in.h>
60#include <linux/slab.h>
61#include <linux/string.h>
62#include <linux/errno.h>
63#include <linux/init.h>
64#include <linux/netdevice.h>
65#include <linux/etherdevice.h>
66#include <linux/skbuff.h>
67#include <linux/if_arp.h>
68#include <linux/if_ltalk.h> /* For ltalk_setup() */
69#include <linux/delay.h> /* For udelay() */
70#include <linux/atalk.h>
71#include <linux/spinlock.h>
72#include <linux/bitops.h>
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
192static irqreturn_t cops_interrupt (int irq, void *dev_id, struct pt_regs *regs);
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);
198static int cops_hard_header (struct sk_buff *skb, struct net_device *dev,
199 unsigned short type, void *daddr, void *saddr,
200 unsigned len);
201
202static int cops_ioctl (struct net_device *dev, struct ifreq *rq, int cmd);
203static int cops_close (struct net_device *dev);
204static struct net_device_stats *cops_get_stats (struct net_device *dev);
205
206static void cleanup_card(struct net_device *dev)
207{
208 if (dev->irq)
209 free_irq(dev->irq, dev);
210 release_region(dev->base_addr, COPS_IO_EXTENT);
211}
212
213/*
214 * Check for a network adaptor of this type, and return '0' iff one exists.
215 * If dev->base_addr == 0, probe all likely locations.
216 * If dev->base_addr in [1..0x1ff], always return failure.
217 * otherwise go with what we pass in.
218 */
219struct net_device * __init cops_probe(int unit)
220{
221 struct net_device *dev;
222 unsigned *port;
223 int base_addr;
224 int err = 0;
225
226 dev = alloc_netdev(sizeof(struct cops_local), "lt%d", ltalk_setup);
227 if (!dev)
228 return ERR_PTR(-ENOMEM);
229
230 if (unit >= 0) {
231 sprintf(dev->name, "lt%d", unit);
232 netdev_boot_setup_check(dev);
233 irq = dev->irq;
234 base_addr = dev->base_addr;
235 } else {
236 base_addr = dev->base_addr = io;
237 }
238
239 SET_MODULE_OWNER(dev);
240
241 if (base_addr > 0x1ff) { /* Check a single specified location. */
242 err = cops_probe1(dev, base_addr);
243 } else if (base_addr != 0) { /* Don't probe at all. */
244 err = -ENXIO;
245 } else {
246 /* FIXME Does this really work for cards which generate irq?
247 * It's definitely N.G. for polled Tangent. sh
248 * Dayna cards don't autoprobe well at all, but if your card is
249 * at IRQ 5 & IO 0x240 we find it every time. ;) JS
250 */
251 for (port = ports; *port && cops_probe1(dev, *port) < 0; port++)
252 ;
253 if (!*port)
254 err = -ENODEV;
255 }
256 if (err)
257 goto out;
258 err = register_netdev(dev);
259 if (err)
260 goto out1;
261 return dev;
262out1:
263 cleanup_card(dev);
264out:
265 free_netdev(dev);
266 return ERR_PTR(err);
267}
268
269/*
270 * This is the real probe routine. Linux has a history of friendly device
271 * probes on the ISA bus. A good device probes avoids doing writes, and
272 * verifies that the correct device exists and functions.
273 */
274static int __init cops_probe1(struct net_device *dev, int ioaddr)
275{
276 struct cops_local *lp;
277 static unsigned version_printed;
278 int board = board_type;
279 int retval;
280
281 if(cops_debug && version_printed++ == 0)
282 printk("%s", version);
283
284 /* Grab the region so no one else tries to probe our ioports. */
285 if (!request_region(ioaddr, COPS_IO_EXTENT, dev->name))
286 return -EBUSY;
287
288 /*
289 * Since this board has jumpered interrupts, allocate the interrupt
290 * vector now. There is no point in waiting since no other device
291 * can use the interrupt, and this marks the irq as busy. Jumpered
292 * interrupts are typically not reported by the boards, and we must
293 * used AutoIRQ to find them.
294 */
295 dev->irq = irq;
296 switch (dev->irq)
297 {
298 case 0:
299 /* COPS AutoIRQ routine */
300 dev->irq = cops_irq(ioaddr, board);
301 if (dev->irq)
302 break;
303 /* No IRQ found on this port, fallthrough */
304 case 1:
305 retval = -EINVAL;
306 goto err_out;
307
308 /* Fixup for users that don't know that IRQ 2 is really
309 * IRQ 9, or don't know which one to set.
310 */
311 case 2:
312 dev->irq = 9;
313 break;
314
315 /* Polled operation requested. Although irq of zero passed as
316 * a parameter tells the init routines to probe, we'll
317 * overload it to denote polled operation at runtime.
318 */
319 case 0xff:
320 dev->irq = 0;
321 break;
322
323 default:
324 break;
325 }
326
327 /* Reserve any actual interrupt. */
328 if (dev->irq) {
329 retval = request_irq(dev->irq, &cops_interrupt, 0, dev->name, dev);
330 if (retval)
331 goto err_out;
332 }
333
334 dev->base_addr = ioaddr;
335
336 lp = netdev_priv(dev);
337 memset(lp, 0, sizeof(struct cops_local));
338 spin_lock_init(&lp->lock);
339
340 /* Copy local board variable to lp struct. */
341 lp->board = board;
342
343 dev->hard_start_xmit = cops_send_packet;
344 dev->tx_timeout = cops_timeout;
345 dev->watchdog_timeo = HZ * 2;
346 dev->hard_header = cops_hard_header;
347 dev->get_stats = cops_get_stats;
348 dev->open = cops_open;
349 dev->stop = cops_close;
350 dev->do_ioctl = cops_ioctl;
351 dev->set_multicast_list = set_multicast_list;
352 dev->mc_list = NULL;
353
354 /* Tell the user where the card is and what mode we're in. */
355 if(board==DAYNA)
356 printk("%s: %s at %#3x, using IRQ %d, in Dayna mode.\n",
357 dev->name, cardname, ioaddr, dev->irq);
358 if(board==TANGENT) {
359 if(dev->irq)
360 printk("%s: %s at %#3x, IRQ %d, in Tangent mode\n",
361 dev->name, cardname, ioaddr, dev->irq);
362 else
363 printk("%s: %s at %#3x, using polled IO, in Tangent mode.\n",
364 dev->name, cardname, ioaddr);
365
366 }
367 return 0;
368
369err_out:
370 release_region(ioaddr, COPS_IO_EXTENT);
371 return retval;
372}
373
374static int __init cops_irq (int ioaddr, int board)
375{ /*
376 * This does not use the IRQ to determine where the IRQ is. We just
377 * assume that when we get a correct status response that it's the IRQ.
378 * This really just verifies the IO port but since we only have access
379 * to such a small number of IRQs (5, 4, 3) this is not bad.
380 * This will probably not work for more than one card.
381 */
382 int irqaddr=0;
383 int i, x, status;
384
385 if(board==DAYNA)
386 {
387 outb(0, ioaddr+DAYNA_RESET);
388 inb(ioaddr+DAYNA_RESET);
389 mdelay(333);
390 }
391 if(board==TANGENT)
392 {
393 inb(ioaddr);
394 outb(0, ioaddr);
395 outb(0, ioaddr+TANG_RESET);
396 }
397
398 for(i=0; cops_irqlist[i] !=0; i++)
399 {
400 irqaddr = cops_irqlist[i];
401 for(x = 0xFFFF; x>0; x --) /* wait for response */
402 {
403 if(board==DAYNA)
404 {
405 status = (inb(ioaddr+DAYNA_CARD_STATUS)&3);
406 if(status == 1)
407 return irqaddr;
408 }
409 if(board==TANGENT)
410 {
411 if((inb(ioaddr+TANG_CARD_STATUS)& TANG_TX_READY) !=0)
412 return irqaddr;
413 }
414 }
415 }
416 return 0; /* no IRQ found */
417}
418
419/*
420 * Open/initialize the board. This is called (in the current kernel)
421 * sometime after booting when the 'ifconfig' program is run.
422 */
423static int cops_open(struct net_device *dev)
424{
425 struct cops_local *lp = netdev_priv(dev);
426
427 if(dev->irq==0)
428 {
429 /*
430 * I don't know if the Dayna-style boards support polled
431 * operation. For now, only allow it for Tangent.
432 */
433 if(lp->board==TANGENT) /* Poll 20 times per second */
434 {
435 init_timer(&cops_timer);
436 cops_timer.function = cops_poll;
437 cops_timer.data = (unsigned long)dev;
438 cops_timer.expires = jiffies + HZ/20;
439 add_timer(&cops_timer);
440 }
441 else
442 {
443 printk(KERN_WARNING "%s: No irq line set\n", dev->name);
444 return -EAGAIN;
445 }
446 }
447
448 cops_jumpstart(dev); /* Start the card up. */
449
450 netif_start_queue(dev);
451 return 0;
452}
453
454/*
455 * This allows for a dynamic start/restart of the entire card.
456 */
457static int cops_jumpstart(struct net_device *dev)
458{
459 struct cops_local *lp = netdev_priv(dev);
460
461 /*
462 * Once the card has the firmware loaded and has acquired
463 * the nodeid, if it is reset it will lose it all.
464 */
465 cops_reset(dev,1); /* Need to reset card before load firmware. */
466 cops_load(dev); /* Load the firmware. */
467
468 /*
469 * If atalkd already gave us a nodeid we will use that
470 * one again, else we wait for atalkd to give us a nodeid
471 * in cops_ioctl. This may cause a problem if someone steals
472 * our nodeid while we are resetting.
473 */
474 if(lp->nodeid == 1)
475 cops_nodeid(dev,lp->node_acquire);
476
477 return 0;
478}
479
480static void tangent_wait_reset(int ioaddr)
481{
482 int timeout=0;
483
484 while(timeout++ < 5 && (inb(ioaddr+TANG_CARD_STATUS)&TANG_TX_READY)==0)
485 mdelay(1); /* Wait 1 second */
486}
487
488/*
489 * Reset the LocalTalk board.
490 */
491static void cops_reset(struct net_device *dev, int sleep)
492{
493 struct cops_local *lp = netdev_priv(dev);
494 int ioaddr=dev->base_addr;
495
496 if(lp->board==TANGENT)
497 {
498 inb(ioaddr); /* Clear request latch. */
499 outb(0,ioaddr); /* Clear the TANG_TX_READY flop. */
500 outb(0, ioaddr+TANG_RESET); /* Reset the adapter. */
501
502 tangent_wait_reset(ioaddr);
503 outb(0, ioaddr+TANG_CLEAR_INT);
504 }
505 if(lp->board==DAYNA)
506 {
507 outb(0, ioaddr+DAYNA_RESET); /* Assert the reset port */
508 inb(ioaddr+DAYNA_RESET); /* Clear the reset */
509 if(sleep)
510 {
511 long snap=jiffies;
512
513 /* Let card finish initializing, about 1/3 second */
514 while(jiffies-snap<HZ/3)
515 schedule();
516 }
517 else
518 mdelay(333);
519 }
520 netif_wake_queue(dev);
521 return;
522}
523
524static void cops_load (struct net_device *dev)
525{
526 struct ifreq ifr;
527 struct ltfirmware *ltf= (struct ltfirmware *)&ifr.ifr_ifru;
528 struct cops_local *lp = netdev_priv(dev);
529 int ioaddr=dev->base_addr;
530 int length, i = 0;
531
532 strcpy(ifr.ifr_name,"lt0");
533
534 /* Get card's firmware code and do some checks on it. */
535#ifdef CONFIG_COPS_DAYNA
536 if(lp->board==DAYNA)
537 {
538 ltf->length=sizeof(ffdrv_code);
539 ltf->data=ffdrv_code;
540 }
541 else
542#endif
543#ifdef CONFIG_COPS_TANGENT
544 if(lp->board==TANGENT)
545 {
546 ltf->length=sizeof(ltdrv_code);
547 ltf->data=ltdrv_code;
548 }
549 else
550#endif
551 {
552 printk(KERN_INFO "%s; unsupported board type.\n", dev->name);
553 return;
554 }
555
556 /* Check to make sure firmware is correct length. */
557 if(lp->board==DAYNA && ltf->length!=5983)
558 {
559 printk(KERN_WARNING "%s: Firmware is not length of FFDRV.BIN.\n", dev->name);
560 return;
561 }
562 if(lp->board==TANGENT && ltf->length!=2501)
563 {
564 printk(KERN_WARNING "%s: Firmware is not length of DRVCODE.BIN.\n", dev->name);
565 return;
566 }
567
568 if(lp->board==DAYNA)
569 {
570 /*
571 * We must wait for a status response
572 * with the DAYNA board.
573 */
574 while(++i<65536)
575 {
576 if((inb(ioaddr+DAYNA_CARD_STATUS)&3)==1)
577 break;
578 }
579
580 if(i==65536)
581 return;
582 }
583
584 /*
585 * Upload the firmware and kick. Byte-by-byte works nicely here.
586 */
587 i=0;
588 length = ltf->length;
589 while(length--)
590 {
591 outb(ltf->data[i], ioaddr);
592 i++;
593 }
594
595 if(cops_debug > 1)
596 printk("%s: Uploaded firmware - %d bytes of %d bytes.\n",
597 dev->name, i, ltf->length);
598
599 if(lp->board==DAYNA) /* Tell Dayna to run the firmware code. */
600 outb(1, ioaddr+DAYNA_INT_CARD);
601 else /* Tell Tang to run the firmware code. */
602 inb(ioaddr);
603
604 if(lp->board==TANGENT)
605 {
606 tangent_wait_reset(ioaddr);
607 inb(ioaddr); /* Clear initial ready signal. */
608 }
609
610 return;
611}
612
613/*
614 * Get the LocalTalk Nodeid from the card. We can suggest
615 * any nodeid 1-254. The card will try and get that exact
616 * address else we can specify 0 as the nodeid and the card
617 * will autoprobe for a nodeid.
618 */
619static int cops_nodeid (struct net_device *dev, int nodeid)
620{
621 struct cops_local *lp = netdev_priv(dev);
622 int ioaddr = dev->base_addr;
623
624 if(lp->board == DAYNA)
625 {
626 /* Empty any pending adapter responses. */
627 while((inb(ioaddr+DAYNA_CARD_STATUS)&DAYNA_TX_READY)==0)
628 {
629 outb(0, ioaddr+COPS_CLEAR_INT); /* Clear interrupts. */
630 if((inb(ioaddr+DAYNA_CARD_STATUS)&0x03)==DAYNA_RX_REQUEST)
631 cops_rx(dev); /* Kick any packets waiting. */
632 schedule();
633 }
634
635 outb(2, ioaddr); /* Output command packet length as 2. */
636 outb(0, ioaddr);
637 outb(LAP_INIT, ioaddr); /* Send LAP_INIT command byte. */
638 outb(nodeid, ioaddr); /* Suggest node address. */
639 }
640
641 if(lp->board == TANGENT)
642 {
643 /* Empty any pending adapter responses. */
644 while(inb(ioaddr+TANG_CARD_STATUS)&TANG_RX_READY)
645 {
646 outb(0, ioaddr+COPS_CLEAR_INT); /* Clear interrupt. */
647 cops_rx(dev); /* Kick out packets waiting. */
648 schedule();
649 }
650
651 /* Not sure what Tangent does if nodeid picked is used. */
652 if(nodeid == 0) /* Seed. */
653 nodeid = jiffies&0xFF; /* Get a random try */
654 outb(2, ioaddr); /* Command length LSB */
655 outb(0, ioaddr); /* Command length MSB */
656 outb(LAP_INIT, ioaddr); /* Send LAP_INIT byte */
657 outb(nodeid, ioaddr); /* LAP address hint. */
658 outb(0xFF, ioaddr); /* Int. level to use */
659 }
660
661 lp->node_acquire=0; /* Set nodeid holder to 0. */
662 while(lp->node_acquire==0) /* Get *True* nodeid finally. */
663 {
664 outb(0, ioaddr+COPS_CLEAR_INT); /* Clear any interrupt. */
665
666 if(lp->board == DAYNA)
667 {
668 if((inb(ioaddr+DAYNA_CARD_STATUS)&0x03)==DAYNA_RX_REQUEST)
669 cops_rx(dev); /* Grab the nodeid put in lp->node_acquire. */
670 }
671 if(lp->board == TANGENT)
672 {
673 if(inb(ioaddr+TANG_CARD_STATUS)&TANG_RX_READY)
674 cops_rx(dev); /* Grab the nodeid put in lp->node_acquire. */
675 }
676 schedule();
677 }
678
679 if(cops_debug > 1)
680 printk(KERN_DEBUG "%s: Node ID %d has been acquired.\n",
681 dev->name, lp->node_acquire);
682
683 lp->nodeid=1; /* Set got nodeid to 1. */
684
685 return 0;
686}
687
688/*
689 * Poll the Tangent type cards to see if we have work.
690 */
691
692static void cops_poll(unsigned long ltdev)
693{
694 int ioaddr, status;
695 int boguscount = 0;
696
697 struct net_device *dev = (struct net_device *)ltdev;
698
699 del_timer(&cops_timer);
700
701 if(dev == NULL)
702 return; /* We've been downed */
703
704 ioaddr = dev->base_addr;
705 do {
706 status=inb(ioaddr+TANG_CARD_STATUS);
707 if(status & TANG_RX_READY)
708 cops_rx(dev);
709 if(status & TANG_TX_READY)
710 netif_wake_queue(dev);
711 status = inb(ioaddr+TANG_CARD_STATUS);
712 } while((++boguscount < 20) && (status&(TANG_RX_READY|TANG_TX_READY)));
713
714 /* poll 20 times per second */
715 cops_timer.expires = jiffies + HZ/20;
716 add_timer(&cops_timer);
717
718 return;
719}
720
721/*
722 * The typical workload of the driver:
723 * Handle the network interface interrupts.
724 */
725static irqreturn_t cops_interrupt(int irq, void *dev_id, struct pt_regs * regs)
726{
727 struct net_device *dev = dev_id;
728 struct cops_local *lp;
729 int ioaddr, status;
730 int boguscount = 0;
731
732 ioaddr = dev->base_addr;
733 lp = netdev_priv(dev);
734
735 if(lp->board==DAYNA)
736 {
737 do {
738 outb(0, ioaddr + COPS_CLEAR_INT);
739 status=inb(ioaddr+DAYNA_CARD_STATUS);
740 if((status&0x03)==DAYNA_RX_REQUEST)
741 cops_rx(dev);
742 netif_wake_queue(dev);
743 } while(++boguscount < 20);
744 }
745 else
746 {
747 do {
748 status=inb(ioaddr+TANG_CARD_STATUS);
749 if(status & TANG_RX_READY)
750 cops_rx(dev);
751 if(status & TANG_TX_READY)
752 netif_wake_queue(dev);
753 status=inb(ioaddr+TANG_CARD_STATUS);
754 } while((++boguscount < 20) && (status&(TANG_RX_READY|TANG_TX_READY)));
755 }
756
757 return IRQ_HANDLED;
758}
759
760/*
761 * We have a good packet(s), get it/them out of the buffers.
762 */
763static void cops_rx(struct net_device *dev)
764{
765 int pkt_len = 0;
766 int rsp_type = 0;
767 struct sk_buff *skb = NULL;
768 struct cops_local *lp = netdev_priv(dev);
769 int ioaddr = dev->base_addr;
770 int boguscount = 0;
771 unsigned long flags;
772
773
774 spin_lock_irqsave(&lp->lock, flags);
775
776 if(lp->board==DAYNA)
777 {
778 outb(0, ioaddr); /* Send out Zero length. */
779 outb(0, ioaddr);
780 outb(DATA_READ, ioaddr); /* Send read command out. */
781
782 /* Wait for DMA to turn around. */
783 while(++boguscount<1000000)
784 {
785 barrier();
786 if((inb(ioaddr+DAYNA_CARD_STATUS)&0x03)==DAYNA_RX_READY)
787 break;
788 }
789
790 if(boguscount==1000000)
791 {
792 printk(KERN_WARNING "%s: DMA timed out.\n",dev->name);
793 spin_unlock_irqrestore(&lp->lock, flags);
794 return;
795 }
796 }
797
798 /* Get response length. */
799 if(lp->board==DAYNA)
800 pkt_len = inb(ioaddr) & 0xFF;
801 else
802 pkt_len = inb(ioaddr) & 0x00FF;
803 pkt_len |= (inb(ioaddr) << 8);
804 /* Input IO code. */
805 rsp_type=inb(ioaddr);
806
807 /* Malloc up new buffer. */
808 skb = dev_alloc_skb(pkt_len);
809 if(skb == NULL)
810 {
811 printk(KERN_WARNING "%s: Memory squeeze, dropping packet.\n",
812 dev->name);
813 lp->stats.rx_dropped++;
814 while(pkt_len--) /* Discard packet */
815 inb(ioaddr);
816 spin_unlock_irqrestore(&lp->lock, flags);
817 return;
818 }
819 skb->dev = dev;
820 skb_put(skb, pkt_len);
821 skb->protocol = htons(ETH_P_LOCALTALK);
822
823 insb(ioaddr, skb->data, pkt_len); /* Eat the Data */
824
825 if(lp->board==DAYNA)
826 outb(1, ioaddr+DAYNA_INT_CARD); /* Interrupt the card */
827
828 spin_unlock_irqrestore(&lp->lock, flags); /* Restore interrupts. */
829
830 /* Check for bad response length */
831 if(pkt_len < 0 || pkt_len > MAX_LLAP_SIZE)
832 {
833 printk(KERN_WARNING "%s: Bad packet length of %d bytes.\n",
834 dev->name, pkt_len);
835 lp->stats.tx_errors++;
836 dev_kfree_skb_any(skb);
837 return;
838 }
839
840 /* Set nodeid and then get out. */
841 if(rsp_type == LAP_INIT_RSP)
842 { /* Nodeid taken from received packet. */
843 lp->node_acquire = skb->data[0];
844 dev_kfree_skb_any(skb);
845 return;
846 }
847
848 /* One last check to make sure we have a good packet. */
849 if(rsp_type != LAP_RESPONSE)
850 {
851 printk(KERN_WARNING "%s: Bad packet type %d.\n", dev->name, rsp_type);
852 lp->stats.tx_errors++;
853 dev_kfree_skb_any(skb);
854 return;
855 }
856
857 skb->mac.raw = skb->data; /* Point to entire packet. */
858 skb_pull(skb,3);
859 skb->h.raw = skb->data; /* Point to data (Skip header). */
860
861 /* Update the counters. */
862 lp->stats.rx_packets++;
863 lp->stats.rx_bytes += skb->len;
864
865 /* Send packet to a higher place. */
866 netif_rx(skb);
867 dev->last_rx = jiffies;
868}
869
870static void cops_timeout(struct net_device *dev)
871{
872 struct cops_local *lp = netdev_priv(dev);
873 int ioaddr = dev->base_addr;
874
875 lp->stats.tx_errors++;
876 if(lp->board==TANGENT)
877 {
878 if((inb(ioaddr+TANG_CARD_STATUS)&TANG_TX_READY)==0)
879 printk(KERN_WARNING "%s: No TX complete interrupt.\n", dev->name);
880 }
881 printk(KERN_WARNING "%s: Transmit timed out.\n", dev->name);
882 cops_jumpstart(dev); /* Restart the card. */
883 dev->trans_start = jiffies;
884 netif_wake_queue(dev);
885}
886
887
888/*
889 * Make the card transmit a LocalTalk packet.
890 */
891
892static int cops_send_packet(struct sk_buff *skb, struct net_device *dev)
893{
894 struct cops_local *lp = netdev_priv(dev);
895 int ioaddr = dev->base_addr;
896 unsigned long flags;
897
898 /*
899 * Block a timer-based transmit from overlapping.
900 */
901
902 netif_stop_queue(dev);
903
904 spin_lock_irqsave(&lp->lock, flags);
905 if(lp->board == DAYNA) /* Wait for adapter transmit buffer. */
906 while((inb(ioaddr+DAYNA_CARD_STATUS)&DAYNA_TX_READY)==0)
907 cpu_relax();
908 if(lp->board == TANGENT) /* Wait for adapter transmit buffer. */
909 while((inb(ioaddr+TANG_CARD_STATUS)&TANG_TX_READY)==0)
910 cpu_relax();
911
912 /* Output IO length. */
913 outb(skb->len, ioaddr);
914 if(lp->board == DAYNA)
915 outb(skb->len >> 8, ioaddr);
916 else
917 outb((skb->len >> 8)&0x0FF, ioaddr);
918
919 /* Output IO code. */
920 outb(LAP_WRITE, ioaddr);
921
922 if(lp->board == DAYNA) /* Check the transmit buffer again. */
923 while((inb(ioaddr+DAYNA_CARD_STATUS)&DAYNA_TX_READY)==0);
924
925 outsb(ioaddr, skb->data, skb->len); /* Send out the data. */
926
927 if(lp->board==DAYNA) /* Dayna requires you kick the card */
928 outb(1, ioaddr+DAYNA_INT_CARD);
929
930 spin_unlock_irqrestore(&lp->lock, flags); /* Restore interrupts. */
931
932 /* Done sending packet, update counters and cleanup. */
933 lp->stats.tx_packets++;
934 lp->stats.tx_bytes += skb->len;
935 dev->trans_start = jiffies;
936 dev_kfree_skb (skb);
937 return 0;
938}
939
940/*
941 * Dummy function to keep the Appletalk layer happy.
942 */
943
944static void set_multicast_list(struct net_device *dev)
945{
946 if(cops_debug >= 3)
947 printk("%s: set_multicast_list executed\n", dev->name);
948}
949
950/*
951 * Another Dummy function to keep the Appletalk layer happy.
952 */
953
954static int cops_hard_header(struct sk_buff *skb, struct net_device *dev,
955 unsigned short type, void *daddr, void *saddr,
956 unsigned len)
957{
958 if(cops_debug >= 3)
959 printk("%s: cops_hard_header executed. Wow!\n", dev->name);
960 return 0;
961}
962
963/*
964 * System ioctls for the COPS LocalTalk card.
965 */
966
967static int cops_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
968{
969 struct cops_local *lp = netdev_priv(dev);
970 struct sockaddr_at *sa = (struct sockaddr_at *)&ifr->ifr_addr;
971 struct atalk_addr *aa = (struct atalk_addr *)&lp->node_addr;
972
973 switch(cmd)
974 {
975 case SIOCSIFADDR:
976 /* Get and set the nodeid and network # atalkd wants. */
977 cops_nodeid(dev, sa->sat_addr.s_node);
978 aa->s_net = sa->sat_addr.s_net;
979 aa->s_node = lp->node_acquire;
980
981 /* Set broardcast address. */
982 dev->broadcast[0] = 0xFF;
983
984 /* Set hardware address. */
985 dev->dev_addr[0] = aa->s_node;
986 dev->addr_len = 1;
987 return 0;
988
989 case SIOCGIFADDR:
990 sa->sat_addr.s_net = aa->s_net;
991 sa->sat_addr.s_node = aa->s_node;
992 return 0;
993
994 default:
995 return -EOPNOTSUPP;
996 }
997}
998
999/*
1000 * The inverse routine to cops_open().
1001 */
1002
1003static int cops_close(struct net_device *dev)
1004{
1005 struct cops_local *lp = netdev_priv(dev);
1006
1007 /* If we were running polled, yank the timer.
1008 */
1009 if(lp->board==TANGENT && dev->irq==0)
1010 del_timer(&cops_timer);
1011
1012 netif_stop_queue(dev);
1013 return 0;
1014}
1015
1016/*
1017 * Get the current statistics.
1018 * This may be called with the card open or closed.
1019 */
1020static struct net_device_stats *cops_get_stats(struct net_device *dev)
1021{
1022 struct cops_local *lp = netdev_priv(dev);
1023 return &lp->stats;
1024}
1025
1026#ifdef MODULE
1027static struct net_device *cops_dev;
1028
1029MODULE_LICENSE("GPL");
1030module_param(io, int, 0);
1031module_param(irq, int, 0);
1032module_param(board_type, int, 0);
1033
1034int init_module(void)
1035{
1036 if (io == 0)
1037 printk(KERN_WARNING "%s: You shouldn't autoprobe with insmod\n",
1038 cardname);
1039 cops_dev = cops_probe(-1);
1040 if (IS_ERR(cops_dev))
1041 return PTR_ERR(cops_dev);
1042 return 0;
1043}
1044
1045void cleanup_module(void)
1046{
1047 unregister_netdev(cops_dev);
1048 cleanup_card(cops_dev);
1049 free_netdev(cops_dev);
1050}
1051#endif /* MODULE */
1052
1053/*
1054 * Local variables:
1055 * compile-command: "gcc -DMODVERSIONS -DMODULE -D__KERNEL__ -Wall -Wstrict-prototypes -O2 -c cops.c"
1056 * c-basic-offset: 4
1057 * c-file-offsets: ((substatement-open . 0))
1058 * End:
1059 */
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