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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; | |
113aa838 | 7 | * - Alan Cox <alan@lxorguk.ukuu.org.uk> |
1da177e4 LT |
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 | ||
36 | static 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 | ||
87 | static const char *cardname = "cops"; | |
88 | ||
89 | #ifdef CONFIG_COPS_DAYNA | |
90 | static int board_type = DAYNA; /* Module exported */ | |
91 | #else | |
92 | static int board_type = TANGENT; | |
93 | #endif | |
94 | ||
95 | static int io = 0x240; /* Default IO for Dayna */ | |
96 | static 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 | ||
145 | static 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 | ||
155 | static int cops_irqlist[] = { | |
156 | 5, 4, 3, 0 | |
157 | }; | |
158 | ||
159 | static 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 | |
165 | static 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 | ||
172 | struct cops_local | |
173 | { | |
1da177e4 LT |
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. */ | |
182 | static int cops_probe1 (struct net_device *dev, int ioaddr); | |
183 | static int cops_irq (int ioaddr, int board); | |
184 | ||
185 | static int cops_open (struct net_device *dev); | |
186 | static int cops_jumpstart (struct net_device *dev); | |
187 | static void cops_reset (struct net_device *dev, int sleep); | |
188 | static void cops_load (struct net_device *dev); | |
189 | static int cops_nodeid (struct net_device *dev, int nodeid); | |
190 | ||
7d12e780 | 191 | static irqreturn_t cops_interrupt (int irq, void *dev_id); |
1da177e4 LT |
192 | static void cops_poll (unsigned long ltdev); |
193 | static void cops_timeout(struct net_device *dev); | |
194 | static void cops_rx (struct net_device *dev); | |
0fc48098 SH |
195 | static netdev_tx_t cops_send_packet (struct sk_buff *skb, |
196 | struct net_device *dev); | |
1da177e4 | 197 | static void set_multicast_list (struct net_device *dev); |
1da177e4 LT |
198 | static int cops_ioctl (struct net_device *dev, struct ifreq *rq, int cmd); |
199 | static int cops_close (struct net_device *dev); | |
1da177e4 LT |
200 | |
201 | static 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 | */ | |
214 | struct 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; | |
255 | out1: | |
256 | cleanup_card(dev); | |
257 | out: | |
258 | free_netdev(dev); | |
259 | return ERR_PTR(err); | |
260 | } | |
261 | ||
c2839d43 SH |
262 | static const struct net_device_ops cops_netdev_ops = { |
263 | .ndo_open = cops_open, | |
264 | .ndo_stop = cops_close, | |
265 | .ndo_start_xmit = cops_send_packet, | |
266 | .ndo_tx_timeout = cops_timeout, | |
267 | .ndo_do_ioctl = cops_ioctl, | |
268 | .ndo_set_multicast_list = set_multicast_list, | |
269 | }; | |
270 | ||
1da177e4 LT |
271 | /* |
272 | * This is the real probe routine. Linux has a history of friendly device | |
273 | * probes on the ISA bus. A good device probes avoids doing writes, and | |
274 | * verifies that the correct device exists and functions. | |
275 | */ | |
276 | static int __init cops_probe1(struct net_device *dev, int ioaddr) | |
277 | { | |
278 | struct cops_local *lp; | |
279 | static unsigned version_printed; | |
280 | int board = board_type; | |
281 | int retval; | |
282 | ||
283 | if(cops_debug && version_printed++ == 0) | |
284 | printk("%s", version); | |
285 | ||
286 | /* Grab the region so no one else tries to probe our ioports. */ | |
287 | if (!request_region(ioaddr, COPS_IO_EXTENT, dev->name)) | |
288 | return -EBUSY; | |
289 | ||
290 | /* | |
291 | * Since this board has jumpered interrupts, allocate the interrupt | |
292 | * vector now. There is no point in waiting since no other device | |
293 | * can use the interrupt, and this marks the irq as busy. Jumpered | |
294 | * interrupts are typically not reported by the boards, and we must | |
295 | * used AutoIRQ to find them. | |
296 | */ | |
297 | dev->irq = irq; | |
298 | switch (dev->irq) | |
299 | { | |
300 | case 0: | |
301 | /* COPS AutoIRQ routine */ | |
302 | dev->irq = cops_irq(ioaddr, board); | |
303 | if (dev->irq) | |
304 | break; | |
305 | /* No IRQ found on this port, fallthrough */ | |
306 | case 1: | |
307 | retval = -EINVAL; | |
308 | goto err_out; | |
309 | ||
310 | /* Fixup for users that don't know that IRQ 2 is really | |
311 | * IRQ 9, or don't know which one to set. | |
312 | */ | |
313 | case 2: | |
314 | dev->irq = 9; | |
315 | break; | |
316 | ||
317 | /* Polled operation requested. Although irq of zero passed as | |
318 | * a parameter tells the init routines to probe, we'll | |
319 | * overload it to denote polled operation at runtime. | |
320 | */ | |
321 | case 0xff: | |
322 | dev->irq = 0; | |
323 | break; | |
324 | ||
325 | default: | |
326 | break; | |
327 | } | |
328 | ||
329 | /* Reserve any actual interrupt. */ | |
330 | if (dev->irq) { | |
a0607fd3 | 331 | retval = request_irq(dev->irq, cops_interrupt, 0, dev->name, dev); |
1da177e4 LT |
332 | if (retval) |
333 | goto err_out; | |
334 | } | |
335 | ||
336 | dev->base_addr = ioaddr; | |
337 | ||
338 | lp = netdev_priv(dev); | |
1da177e4 LT |
339 | spin_lock_init(&lp->lock); |
340 | ||
341 | /* Copy local board variable to lp struct. */ | |
342 | lp->board = board; | |
343 | ||
c2839d43 | 344 | dev->netdev_ops = &cops_netdev_ops; |
1da177e4 | 345 | dev->watchdog_timeo = HZ * 2; |
3b04ddde | 346 | |
1da177e4 LT |
347 | |
348 | /* Tell the user where the card is and what mode we're in. */ | |
349 | if(board==DAYNA) | |
350 | printk("%s: %s at %#3x, using IRQ %d, in Dayna mode.\n", | |
351 | dev->name, cardname, ioaddr, dev->irq); | |
352 | if(board==TANGENT) { | |
353 | if(dev->irq) | |
354 | printk("%s: %s at %#3x, IRQ %d, in Tangent mode\n", | |
355 | dev->name, cardname, ioaddr, dev->irq); | |
356 | else | |
357 | printk("%s: %s at %#3x, using polled IO, in Tangent mode.\n", | |
358 | dev->name, cardname, ioaddr); | |
359 | ||
360 | } | |
361 | return 0; | |
362 | ||
363 | err_out: | |
364 | release_region(ioaddr, COPS_IO_EXTENT); | |
365 | return retval; | |
366 | } | |
367 | ||
368 | static int __init cops_irq (int ioaddr, int board) | |
369 | { /* | |
370 | * This does not use the IRQ to determine where the IRQ is. We just | |
371 | * assume that when we get a correct status response that it's the IRQ. | |
372 | * This really just verifies the IO port but since we only have access | |
373 | * to such a small number of IRQs (5, 4, 3) this is not bad. | |
374 | * This will probably not work for more than one card. | |
375 | */ | |
376 | int irqaddr=0; | |
377 | int i, x, status; | |
378 | ||
379 | if(board==DAYNA) | |
380 | { | |
381 | outb(0, ioaddr+DAYNA_RESET); | |
382 | inb(ioaddr+DAYNA_RESET); | |
383 | mdelay(333); | |
384 | } | |
385 | if(board==TANGENT) | |
386 | { | |
387 | inb(ioaddr); | |
388 | outb(0, ioaddr); | |
389 | outb(0, ioaddr+TANG_RESET); | |
390 | } | |
391 | ||
392 | for(i=0; cops_irqlist[i] !=0; i++) | |
393 | { | |
394 | irqaddr = cops_irqlist[i]; | |
395 | for(x = 0xFFFF; x>0; x --) /* wait for response */ | |
396 | { | |
397 | if(board==DAYNA) | |
398 | { | |
399 | status = (inb(ioaddr+DAYNA_CARD_STATUS)&3); | |
400 | if(status == 1) | |
401 | return irqaddr; | |
402 | } | |
403 | if(board==TANGENT) | |
404 | { | |
405 | if((inb(ioaddr+TANG_CARD_STATUS)& TANG_TX_READY) !=0) | |
406 | return irqaddr; | |
407 | } | |
408 | } | |
409 | } | |
410 | return 0; /* no IRQ found */ | |
411 | } | |
412 | ||
413 | /* | |
414 | * Open/initialize the board. This is called (in the current kernel) | |
415 | * sometime after booting when the 'ifconfig' program is run. | |
416 | */ | |
417 | static int cops_open(struct net_device *dev) | |
418 | { | |
419 | struct cops_local *lp = netdev_priv(dev); | |
420 | ||
421 | if(dev->irq==0) | |
422 | { | |
423 | /* | |
424 | * I don't know if the Dayna-style boards support polled | |
425 | * operation. For now, only allow it for Tangent. | |
426 | */ | |
427 | if(lp->board==TANGENT) /* Poll 20 times per second */ | |
428 | { | |
429 | init_timer(&cops_timer); | |
430 | cops_timer.function = cops_poll; | |
431 | cops_timer.data = (unsigned long)dev; | |
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 | */ | |
451 | static 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 | ||
474 | static 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 | */ | |
485 | static 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 */ | |
7ab267d4 JG |
503 | if (sleep) |
504 | msleep(333); | |
505 | else | |
506 | mdelay(333); | |
1da177e4 | 507 | } |
7ab267d4 | 508 | |
1da177e4 | 509 | netif_wake_queue(dev); |
1da177e4 LT |
510 | } |
511 | ||
512 | static 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 | return; | |
599 | } | |
600 | ||
601 | /* | |
602 | * Get the LocalTalk Nodeid from the card. We can suggest | |
603 | * any nodeid 1-254. The card will try and get that exact | |
604 | * address else we can specify 0 as the nodeid and the card | |
605 | * will autoprobe for a nodeid. | |
606 | */ | |
607 | static int cops_nodeid (struct net_device *dev, int nodeid) | |
608 | { | |
609 | struct cops_local *lp = netdev_priv(dev); | |
610 | int ioaddr = dev->base_addr; | |
611 | ||
612 | if(lp->board == DAYNA) | |
613 | { | |
614 | /* Empty any pending adapter responses. */ | |
615 | while((inb(ioaddr+DAYNA_CARD_STATUS)&DAYNA_TX_READY)==0) | |
616 | { | |
617 | outb(0, ioaddr+COPS_CLEAR_INT); /* Clear interrupts. */ | |
618 | if((inb(ioaddr+DAYNA_CARD_STATUS)&0x03)==DAYNA_RX_REQUEST) | |
619 | cops_rx(dev); /* Kick any packets waiting. */ | |
620 | schedule(); | |
621 | } | |
622 | ||
623 | outb(2, ioaddr); /* Output command packet length as 2. */ | |
624 | outb(0, ioaddr); | |
625 | outb(LAP_INIT, ioaddr); /* Send LAP_INIT command byte. */ | |
626 | outb(nodeid, ioaddr); /* Suggest node address. */ | |
627 | } | |
628 | ||
629 | if(lp->board == TANGENT) | |
630 | { | |
631 | /* Empty any pending adapter responses. */ | |
632 | while(inb(ioaddr+TANG_CARD_STATUS)&TANG_RX_READY) | |
633 | { | |
634 | outb(0, ioaddr+COPS_CLEAR_INT); /* Clear interrupt. */ | |
635 | cops_rx(dev); /* Kick out packets waiting. */ | |
636 | schedule(); | |
637 | } | |
638 | ||
639 | /* Not sure what Tangent does if nodeid picked is used. */ | |
640 | if(nodeid == 0) /* Seed. */ | |
641 | nodeid = jiffies&0xFF; /* Get a random try */ | |
642 | outb(2, ioaddr); /* Command length LSB */ | |
643 | outb(0, ioaddr); /* Command length MSB */ | |
644 | outb(LAP_INIT, ioaddr); /* Send LAP_INIT byte */ | |
645 | outb(nodeid, ioaddr); /* LAP address hint. */ | |
646 | outb(0xFF, ioaddr); /* Int. level to use */ | |
647 | } | |
648 | ||
649 | lp->node_acquire=0; /* Set nodeid holder to 0. */ | |
650 | while(lp->node_acquire==0) /* Get *True* nodeid finally. */ | |
651 | { | |
652 | outb(0, ioaddr+COPS_CLEAR_INT); /* Clear any interrupt. */ | |
653 | ||
654 | if(lp->board == DAYNA) | |
655 | { | |
656 | if((inb(ioaddr+DAYNA_CARD_STATUS)&0x03)==DAYNA_RX_REQUEST) | |
657 | cops_rx(dev); /* Grab the nodeid put in lp->node_acquire. */ | |
658 | } | |
659 | if(lp->board == TANGENT) | |
660 | { | |
661 | if(inb(ioaddr+TANG_CARD_STATUS)&TANG_RX_READY) | |
662 | cops_rx(dev); /* Grab the nodeid put in lp->node_acquire. */ | |
663 | } | |
664 | schedule(); | |
665 | } | |
666 | ||
667 | if(cops_debug > 1) | |
668 | printk(KERN_DEBUG "%s: Node ID %d has been acquired.\n", | |
669 | dev->name, lp->node_acquire); | |
670 | ||
671 | lp->nodeid=1; /* Set got nodeid to 1. */ | |
672 | ||
673 | return 0; | |
674 | } | |
675 | ||
676 | /* | |
677 | * Poll the Tangent type cards to see if we have work. | |
678 | */ | |
679 | ||
680 | static void cops_poll(unsigned long ltdev) | |
681 | { | |
682 | int ioaddr, status; | |
683 | int boguscount = 0; | |
684 | ||
685 | struct net_device *dev = (struct net_device *)ltdev; | |
686 | ||
687 | del_timer(&cops_timer); | |
688 | ||
689 | if(dev == NULL) | |
690 | return; /* We've been downed */ | |
691 | ||
692 | ioaddr = dev->base_addr; | |
693 | do { | |
694 | status=inb(ioaddr+TANG_CARD_STATUS); | |
695 | if(status & TANG_RX_READY) | |
696 | cops_rx(dev); | |
697 | if(status & TANG_TX_READY) | |
698 | netif_wake_queue(dev); | |
699 | status = inb(ioaddr+TANG_CARD_STATUS); | |
700 | } while((++boguscount < 20) && (status&(TANG_RX_READY|TANG_TX_READY))); | |
701 | ||
702 | /* poll 20 times per second */ | |
703 | cops_timer.expires = jiffies + HZ/20; | |
704 | add_timer(&cops_timer); | |
705 | ||
706 | return; | |
707 | } | |
708 | ||
709 | /* | |
710 | * The typical workload of the driver: | |
711 | * Handle the network interface interrupts. | |
712 | */ | |
7d12e780 | 713 | static irqreturn_t cops_interrupt(int irq, void *dev_id) |
1da177e4 LT |
714 | { |
715 | struct net_device *dev = dev_id; | |
716 | struct cops_local *lp; | |
717 | int ioaddr, status; | |
718 | int boguscount = 0; | |
719 | ||
720 | ioaddr = dev->base_addr; | |
721 | lp = netdev_priv(dev); | |
722 | ||
723 | if(lp->board==DAYNA) | |
724 | { | |
725 | do { | |
726 | outb(0, ioaddr + COPS_CLEAR_INT); | |
727 | status=inb(ioaddr+DAYNA_CARD_STATUS); | |
728 | if((status&0x03)==DAYNA_RX_REQUEST) | |
729 | cops_rx(dev); | |
730 | netif_wake_queue(dev); | |
731 | } while(++boguscount < 20); | |
732 | } | |
733 | else | |
734 | { | |
735 | do { | |
736 | status=inb(ioaddr+TANG_CARD_STATUS); | |
737 | if(status & TANG_RX_READY) | |
738 | cops_rx(dev); | |
739 | if(status & TANG_TX_READY) | |
740 | netif_wake_queue(dev); | |
741 | status=inb(ioaddr+TANG_CARD_STATUS); | |
742 | } while((++boguscount < 20) && (status&(TANG_RX_READY|TANG_TX_READY))); | |
743 | } | |
744 | ||
745 | return IRQ_HANDLED; | |
746 | } | |
747 | ||
748 | /* | |
749 | * We have a good packet(s), get it/them out of the buffers. | |
750 | */ | |
751 | static void cops_rx(struct net_device *dev) | |
752 | { | |
753 | int pkt_len = 0; | |
754 | int rsp_type = 0; | |
755 | struct sk_buff *skb = NULL; | |
756 | struct cops_local *lp = netdev_priv(dev); | |
757 | int ioaddr = dev->base_addr; | |
758 | int boguscount = 0; | |
759 | unsigned long flags; | |
760 | ||
761 | ||
762 | spin_lock_irqsave(&lp->lock, flags); | |
763 | ||
764 | if(lp->board==DAYNA) | |
765 | { | |
766 | outb(0, ioaddr); /* Send out Zero length. */ | |
767 | outb(0, ioaddr); | |
768 | outb(DATA_READ, ioaddr); /* Send read command out. */ | |
769 | ||
770 | /* Wait for DMA to turn around. */ | |
771 | while(++boguscount<1000000) | |
772 | { | |
773 | barrier(); | |
774 | if((inb(ioaddr+DAYNA_CARD_STATUS)&0x03)==DAYNA_RX_READY) | |
775 | break; | |
776 | } | |
777 | ||
778 | if(boguscount==1000000) | |
779 | { | |
780 | printk(KERN_WARNING "%s: DMA timed out.\n",dev->name); | |
781 | spin_unlock_irqrestore(&lp->lock, flags); | |
782 | return; | |
783 | } | |
784 | } | |
785 | ||
786 | /* Get response length. */ | |
787 | if(lp->board==DAYNA) | |
788 | pkt_len = inb(ioaddr) & 0xFF; | |
789 | else | |
790 | pkt_len = inb(ioaddr) & 0x00FF; | |
791 | pkt_len |= (inb(ioaddr) << 8); | |
792 | /* Input IO code. */ | |
793 | rsp_type=inb(ioaddr); | |
794 | ||
795 | /* Malloc up new buffer. */ | |
796 | skb = dev_alloc_skb(pkt_len); | |
797 | if(skb == NULL) | |
798 | { | |
799 | printk(KERN_WARNING "%s: Memory squeeze, dropping packet.\n", | |
800 | dev->name); | |
8bbce3f6 | 801 | dev->stats.rx_dropped++; |
1da177e4 LT |
802 | while(pkt_len--) /* Discard packet */ |
803 | inb(ioaddr); | |
804 | spin_unlock_irqrestore(&lp->lock, flags); | |
805 | return; | |
806 | } | |
807 | skb->dev = dev; | |
808 | skb_put(skb, pkt_len); | |
809 | skb->protocol = htons(ETH_P_LOCALTALK); | |
810 | ||
811 | insb(ioaddr, skb->data, pkt_len); /* Eat the Data */ | |
812 | ||
813 | if(lp->board==DAYNA) | |
814 | outb(1, ioaddr+DAYNA_INT_CARD); /* Interrupt the card */ | |
815 | ||
816 | spin_unlock_irqrestore(&lp->lock, flags); /* Restore interrupts. */ | |
817 | ||
818 | /* Check for bad response length */ | |
819 | if(pkt_len < 0 || pkt_len > MAX_LLAP_SIZE) | |
820 | { | |
821 | printk(KERN_WARNING "%s: Bad packet length of %d bytes.\n", | |
822 | dev->name, pkt_len); | |
8bbce3f6 | 823 | dev->stats.tx_errors++; |
1da177e4 LT |
824 | dev_kfree_skb_any(skb); |
825 | return; | |
826 | } | |
827 | ||
828 | /* Set nodeid and then get out. */ | |
829 | if(rsp_type == LAP_INIT_RSP) | |
830 | { /* Nodeid taken from received packet. */ | |
831 | lp->node_acquire = skb->data[0]; | |
832 | dev_kfree_skb_any(skb); | |
833 | return; | |
834 | } | |
835 | ||
836 | /* One last check to make sure we have a good packet. */ | |
837 | if(rsp_type != LAP_RESPONSE) | |
838 | { | |
839 | printk(KERN_WARNING "%s: Bad packet type %d.\n", dev->name, rsp_type); | |
8bbce3f6 | 840 | dev->stats.tx_errors++; |
1da177e4 LT |
841 | dev_kfree_skb_any(skb); |
842 | return; | |
843 | } | |
844 | ||
459a98ed | 845 | skb_reset_mac_header(skb); /* Point to entire packet. */ |
1da177e4 | 846 | skb_pull(skb,3); |
badff6d0 | 847 | skb_reset_transport_header(skb); /* Point to data (Skip header). */ |
1da177e4 LT |
848 | |
849 | /* Update the counters. */ | |
8bbce3f6 SH |
850 | dev->stats.rx_packets++; |
851 | dev->stats.rx_bytes += skb->len; | |
1da177e4 LT |
852 | |
853 | /* Send packet to a higher place. */ | |
854 | netif_rx(skb); | |
1da177e4 LT |
855 | } |
856 | ||
857 | static void cops_timeout(struct net_device *dev) | |
858 | { | |
859 | struct cops_local *lp = netdev_priv(dev); | |
860 | int ioaddr = dev->base_addr; | |
861 | ||
8bbce3f6 | 862 | dev->stats.tx_errors++; |
1da177e4 LT |
863 | if(lp->board==TANGENT) |
864 | { | |
865 | if((inb(ioaddr+TANG_CARD_STATUS)&TANG_TX_READY)==0) | |
866 | printk(KERN_WARNING "%s: No TX complete interrupt.\n", dev->name); | |
867 | } | |
868 | printk(KERN_WARNING "%s: Transmit timed out.\n", dev->name); | |
869 | cops_jumpstart(dev); /* Restart the card. */ | |
870 | dev->trans_start = jiffies; | |
871 | netif_wake_queue(dev); | |
872 | } | |
873 | ||
874 | ||
875 | /* | |
876 | * Make the card transmit a LocalTalk packet. | |
877 | */ | |
878 | ||
0fc48098 SH |
879 | static netdev_tx_t cops_send_packet(struct sk_buff *skb, |
880 | struct net_device *dev) | |
1da177e4 LT |
881 | { |
882 | struct cops_local *lp = netdev_priv(dev); | |
883 | int ioaddr = dev->base_addr; | |
884 | unsigned long flags; | |
885 | ||
886 | /* | |
887 | * Block a timer-based transmit from overlapping. | |
888 | */ | |
889 | ||
890 | netif_stop_queue(dev); | |
891 | ||
892 | spin_lock_irqsave(&lp->lock, flags); | |
893 | if(lp->board == DAYNA) /* Wait for adapter transmit buffer. */ | |
894 | while((inb(ioaddr+DAYNA_CARD_STATUS)&DAYNA_TX_READY)==0) | |
895 | cpu_relax(); | |
896 | if(lp->board == TANGENT) /* Wait for adapter transmit buffer. */ | |
897 | while((inb(ioaddr+TANG_CARD_STATUS)&TANG_TX_READY)==0) | |
898 | cpu_relax(); | |
899 | ||
900 | /* Output IO length. */ | |
901 | outb(skb->len, ioaddr); | |
902 | if(lp->board == DAYNA) | |
903 | outb(skb->len >> 8, ioaddr); | |
904 | else | |
905 | outb((skb->len >> 8)&0x0FF, ioaddr); | |
906 | ||
907 | /* Output IO code. */ | |
908 | outb(LAP_WRITE, ioaddr); | |
909 | ||
910 | if(lp->board == DAYNA) /* Check the transmit buffer again. */ | |
911 | while((inb(ioaddr+DAYNA_CARD_STATUS)&DAYNA_TX_READY)==0); | |
912 | ||
913 | outsb(ioaddr, skb->data, skb->len); /* Send out the data. */ | |
914 | ||
915 | if(lp->board==DAYNA) /* Dayna requires you kick the card */ | |
916 | outb(1, ioaddr+DAYNA_INT_CARD); | |
917 | ||
918 | spin_unlock_irqrestore(&lp->lock, flags); /* Restore interrupts. */ | |
919 | ||
920 | /* Done sending packet, update counters and cleanup. */ | |
8bbce3f6 SH |
921 | dev->stats.tx_packets++; |
922 | dev->stats.tx_bytes += skb->len; | |
1da177e4 LT |
923 | dev->trans_start = jiffies; |
924 | dev_kfree_skb (skb); | |
6ed10654 | 925 | return NETDEV_TX_OK; |
1da177e4 LT |
926 | } |
927 | ||
928 | /* | |
929 | * Dummy function to keep the Appletalk layer happy. | |
930 | */ | |
931 | ||
932 | static void set_multicast_list(struct net_device *dev) | |
933 | { | |
934 | if(cops_debug >= 3) | |
935 | printk("%s: set_multicast_list executed\n", dev->name); | |
936 | } | |
937 | ||
1da177e4 LT |
938 | /* |
939 | * System ioctls for the COPS LocalTalk card. | |
940 | */ | |
941 | ||
942 | static int cops_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) | |
943 | { | |
944 | struct cops_local *lp = netdev_priv(dev); | |
945 | struct sockaddr_at *sa = (struct sockaddr_at *)&ifr->ifr_addr; | |
946 | struct atalk_addr *aa = (struct atalk_addr *)&lp->node_addr; | |
947 | ||
948 | switch(cmd) | |
949 | { | |
950 | case SIOCSIFADDR: | |
951 | /* Get and set the nodeid and network # atalkd wants. */ | |
952 | cops_nodeid(dev, sa->sat_addr.s_node); | |
953 | aa->s_net = sa->sat_addr.s_net; | |
954 | aa->s_node = lp->node_acquire; | |
955 | ||
956 | /* Set broardcast address. */ | |
957 | dev->broadcast[0] = 0xFF; | |
958 | ||
959 | /* Set hardware address. */ | |
960 | dev->dev_addr[0] = aa->s_node; | |
961 | dev->addr_len = 1; | |
962 | return 0; | |
963 | ||
964 | case SIOCGIFADDR: | |
965 | sa->sat_addr.s_net = aa->s_net; | |
966 | sa->sat_addr.s_node = aa->s_node; | |
967 | return 0; | |
968 | ||
969 | default: | |
970 | return -EOPNOTSUPP; | |
971 | } | |
972 | } | |
973 | ||
974 | /* | |
975 | * The inverse routine to cops_open(). | |
976 | */ | |
977 | ||
978 | static int cops_close(struct net_device *dev) | |
979 | { | |
980 | struct cops_local *lp = netdev_priv(dev); | |
981 | ||
982 | /* If we were running polled, yank the timer. | |
983 | */ | |
984 | if(lp->board==TANGENT && dev->irq==0) | |
985 | del_timer(&cops_timer); | |
986 | ||
987 | netif_stop_queue(dev); | |
988 | return 0; | |
989 | } | |
990 | ||
1da177e4 LT |
991 | |
992 | #ifdef MODULE | |
993 | static struct net_device *cops_dev; | |
994 | ||
995 | MODULE_LICENSE("GPL"); | |
996 | module_param(io, int, 0); | |
997 | module_param(irq, int, 0); | |
998 | module_param(board_type, int, 0); | |
999 | ||
b32dac08 | 1000 | static int __init cops_module_init(void) |
1da177e4 LT |
1001 | { |
1002 | if (io == 0) | |
1003 | printk(KERN_WARNING "%s: You shouldn't autoprobe with insmod\n", | |
1004 | cardname); | |
1005 | cops_dev = cops_probe(-1); | |
1006 | if (IS_ERR(cops_dev)) | |
1007 | return PTR_ERR(cops_dev); | |
1008 | return 0; | |
1009 | } | |
1010 | ||
b32dac08 | 1011 | static void __exit cops_module_exit(void) |
1da177e4 LT |
1012 | { |
1013 | unregister_netdev(cops_dev); | |
1014 | cleanup_card(cops_dev); | |
1015 | free_netdev(cops_dev); | |
1016 | } | |
b32dac08 JS |
1017 | module_init(cops_module_init); |
1018 | module_exit(cops_module_exit); | |
1da177e4 | 1019 | #endif /* MODULE */ |