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Committer: Michael Beasley <mike@snafu.setup>
[mikesnafu-overlay.git] / drivers / net / wireless / arlan-main.c
blobdbdfc9e39d20eec73f0e9424570010f9ac3022b0
1 /*
2 * Copyright (C) 1997 Cullen Jennings
3 * Copyright (C) 1998 Elmer Joandiu, elmer@ylenurme.ee
4 * GNU General Public License applies
5 * This module provides support for the Arlan 655 card made by Aironet
6 */
7
8 #include "arlan.h"
9
10 #if BITS_PER_LONG != 32
11 # error FIXME: this driver requires a 32-bit platform
12 #endif
13
14 static const char *arlan_version = "C.Jennigs 97 & Elmer.Joandi@ut.ee Oct'98, http://www.ylenurme.ee/~elmer/655/";
15
16 struct net_device *arlan_device[MAX_ARLANS];
17
18 static int SID = SIDUNKNOWN;
19 static int radioNodeId = radioNodeIdUNKNOWN;
20 static char encryptionKey[12] = {'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h'};
21 int arlan_debug = debugUNKNOWN;
22 static int spreadingCode = spreadingCodeUNKNOWN;
23 static int channelNumber = channelNumberUNKNOWN;
24 static int channelSet = channelSetUNKNOWN;
25 static int systemId = systemIdUNKNOWN;
26 static int registrationMode = registrationModeUNKNOWN;
27 static int keyStart;
28 static int tx_delay_ms;
29 static int retries = 5;
30 static int tx_queue_len = 1;
31 static int arlan_EEPROM_bad;
32
33 #ifdef ARLAN_DEBUGGING
34
35 static int testMemory = testMemoryUNKNOWN;
36 static int irq = irqUNKNOWN;
37 static int txScrambled = 1;
38 static int mdebug;
39
40 module_param(irq, int, 0);
41 module_param(mdebug, int, 0);
42 module_param(testMemory, int, 0);
43 module_param(txScrambled, int, 0);
44 MODULE_PARM_DESC(irq, "(unused)");
45 MODULE_PARM_DESC(testMemory, "(unused)");
46 MODULE_PARM_DESC(mdebug, "Arlan multicast debugging (0-1)");
47 #endif
48
49 module_param_named(debug, arlan_debug, int, 0);
50 module_param(spreadingCode, int, 0);
51 module_param(channelNumber, int, 0);
52 module_param(channelSet, int, 0);
53 module_param(systemId, int, 0);
54 module_param(registrationMode, int, 0);
55 module_param(radioNodeId, int, 0);
56 module_param(SID, int, 0);
57 module_param(keyStart, int, 0);
58 module_param(tx_delay_ms, int, 0);
59 module_param(retries, int, 0);
60 module_param(tx_queue_len, int, 0);
61 module_param_named(EEPROM_bad, arlan_EEPROM_bad, int, 0);
62 MODULE_PARM_DESC(debug, "Arlan debug enable (0-1)");
63 MODULE_PARM_DESC(retries, "Arlan maximum packet retransmisions");
64 #ifdef ARLAN_ENTRY_EXIT_DEBUGGING
65 static int arlan_entry_debug;
66 static int arlan_exit_debug;
67 static int arlan_entry_and_exit_debug;
68 module_param_named(entry_debug, arlan_entry_debug, int, 0);
69 module_param_named(exit_debug, arlan_exit_debug, int, 0);
70 module_param_named(entry_and_exit_debug, arlan_entry_and_exit_debug, int, 0);
71 MODULE_PARM_DESC(entry_debug, "Arlan driver function entry debugging");
72 MODULE_PARM_DESC(exit_debug, "Arlan driver function exit debugging");
73 MODULE_PARM_DESC(entry_and_exit_debug, "Arlan driver function entry and exit debugging");
74 #endif
75
76 struct arlan_conf_stru arlan_conf[MAX_ARLANS];
77 static int arlans_found;
78
79 static int arlan_open(struct net_device *dev);
80 static int arlan_tx(struct sk_buff *skb, struct net_device *dev);
81 static irqreturn_t arlan_interrupt(int irq, void *dev_id);
82 static int arlan_close(struct net_device *dev);
83 static struct net_device_stats *
84 arlan_statistics (struct net_device *dev);
85 static void arlan_set_multicast (struct net_device *dev);
86 static int arlan_hw_tx (struct net_device* dev, char *buf, int length );
87 static int arlan_hw_config (struct net_device * dev);
88 static void arlan_tx_done_interrupt (struct net_device * dev, int status);
89 static void arlan_rx_interrupt (struct net_device * dev, u_char rxStatus, u_short, u_short);
90 static void arlan_process_interrupt (struct net_device * dev);
91 static void arlan_tx_timeout (struct net_device *dev);
92
93 static inline long us2ticks(int us)
94 {
95 return us * (1000000 / HZ);
96 }
97
98
99 #ifdef ARLAN_ENTRY_EXIT_DEBUGGING
100 #define ARLAN_DEBUG_ENTRY(name) \
101 {\
102 struct timeval timev;\
103 do_gettimeofday(&timev);\
104 if (arlan_entry_debug || arlan_entry_and_exit_debug)\
105 printk("--->>>" name " %ld " "\n",((long int) timev.tv_sec * 1000000 + timev.tv_usec));\
106 }
107 #define ARLAN_DEBUG_EXIT(name) \
108 {\
109 struct timeval timev;\
110 do_gettimeofday(&timev);\
111 if (arlan_exit_debug || arlan_entry_and_exit_debug)\
112 printk("<<<---" name " %ld " "\n",((long int) timev.tv_sec * 1000000 + timev.tv_usec) );\
113 }
114 #else
115 #define ARLAN_DEBUG_ENTRY(name)
116 #define ARLAN_DEBUG_EXIT(name)
117 #endif
118
119
120 #define arlan_interrupt_ack(dev)\
121 clearClearInterrupt(dev);\
122 setClearInterrupt(dev);
123
124 static inline int arlan_drop_tx(struct net_device *dev)
125 {
126 struct arlan_private *priv = netdev_priv(dev);
127
128 priv->stats.tx_errors++;
129 if (priv->Conf->tx_delay_ms)
130 {
131 priv->tx_done_delayed = jiffies + priv->Conf->tx_delay_ms * HZ / 1000 + 1;
132 }
133 else
134 {
135 priv->waiting_command_mask &= ~ARLAN_COMMAND_TX;
136 TXHEAD(dev).offset = 0;
137 TXTAIL(dev).offset = 0;
138 priv->txLast = 0;
139 priv->bad = 0;
140 if (!priv->under_reset && !priv->under_config)
141 netif_wake_queue (dev);
142 }
143 return 1;
144 }
145
146
147 int arlan_command(struct net_device *dev, int command_p)
148 {
149 struct arlan_private *priv = netdev_priv(dev);
150 volatile struct arlan_shmem __iomem *arlan = priv->card;
151 struct arlan_conf_stru *conf = priv->Conf;
152 int udelayed = 0;
153 int i = 0;
154 unsigned long flags;
155
156 ARLAN_DEBUG_ENTRY("arlan_command");
157
158 if (priv->card_polling_interval)
159 priv->card_polling_interval = 1;
160
161 if (arlan_debug & ARLAN_DEBUG_CHAIN_LOCKS)
162 printk(KERN_DEBUG "arlan_command, %lx commandByte %x waiting %lx incoming %x \n",
163 jiffies, READSHMB(arlan->commandByte),
164 priv->waiting_command_mask, command_p);
165
166 priv->waiting_command_mask |= command_p;
167
168 if (priv->waiting_command_mask & ARLAN_COMMAND_RESET)
169 if (time_after(jiffies, priv->lastReset + 5 * HZ))
170 priv->waiting_command_mask &= ~ARLAN_COMMAND_RESET;
171
172 if (priv->waiting_command_mask & ARLAN_COMMAND_INT_ACK)
173 {
174 arlan_interrupt_ack(dev);
175 priv->waiting_command_mask &= ~ARLAN_COMMAND_INT_ACK;
176 }
177 if (priv->waiting_command_mask & ARLAN_COMMAND_INT_ENABLE)
178 {
179 setInterruptEnable(dev);
180 priv->waiting_command_mask &= ~ARLAN_COMMAND_INT_ENABLE;
181 }
182
183 /* Card access serializing lock */
184 spin_lock_irqsave(&priv->lock, flags);
185
186 /* Check cards status and waiting */
187
188 if (priv->waiting_command_mask & (ARLAN_COMMAND_LONG_WAIT_NOW | ARLAN_COMMAND_WAIT_NOW))
189 {
190 while (priv->waiting_command_mask & (ARLAN_COMMAND_LONG_WAIT_NOW | ARLAN_COMMAND_WAIT_NOW))
191 {
192 if (READSHMB(arlan->resetFlag) ||
193 READSHMB(arlan->commandByte)) /* ||
194 (readControlRegister(dev) & ARLAN_ACCESS))
195 */
196 udelay(40);
197 else
198 priv->waiting_command_mask &= ~(ARLAN_COMMAND_LONG_WAIT_NOW | ARLAN_COMMAND_WAIT_NOW);
199
200 udelayed++;
201
202 if (priv->waiting_command_mask & ARLAN_COMMAND_LONG_WAIT_NOW)
203 {
204 if (udelayed * 40 > 1000000)
205 {
206 printk(KERN_ERR "%s long wait too long \n", dev->name);
207 priv->waiting_command_mask |= ARLAN_COMMAND_RESET;
208 break;
209 }
210 }
211 else if (priv->waiting_command_mask & ARLAN_COMMAND_WAIT_NOW)
212 {
213 if (udelayed * 40 > 1000)
214 {
215 printk(KERN_ERR "%s short wait too long \n", dev->name);
216 goto bad_end;
217 }
218 }
219 }
220 }
221 else
222 {
223 i = 0;
224 while ((READSHMB(arlan->resetFlag) ||
225 READSHMB(arlan->commandByte)) &&
226 conf->pre_Command_Wait > (i++) * 10)
227 udelay(10);
228
229
230 if ((READSHMB(arlan->resetFlag) ||
231 READSHMB(arlan->commandByte)) &&
232 !(priv->waiting_command_mask & ARLAN_COMMAND_RESET))
233 {
234 goto card_busy_end;
235 }
236 }
237 if (priv->waiting_command_mask & ARLAN_COMMAND_RESET)
238 priv->under_reset = 1;
239 if (priv->waiting_command_mask & ARLAN_COMMAND_CONF)
240 priv->under_config = 1;
241
242 /* Issuing command */
243 arlan_lock_card_access(dev);
244 if (priv->waiting_command_mask & ARLAN_COMMAND_POWERUP)
245 {
246 // if (readControlRegister(dev) & (ARLAN_ACCESS && ARLAN_POWER))
247 setPowerOn(dev);
248 arlan_interrupt_lancpu(dev);
249 priv->waiting_command_mask &= ~ARLAN_COMMAND_POWERUP;
250 priv->waiting_command_mask |= ARLAN_COMMAND_RESET;
251 priv->card_polling_interval = HZ / 10;
252 }
253 else if (priv->waiting_command_mask & ARLAN_COMMAND_ACTIVATE)
254 {
255 WRITESHMB(arlan->commandByte, ARLAN_COM_ACTIVATE);
256 arlan_interrupt_lancpu(dev);
257 priv->waiting_command_mask &= ~ARLAN_COMMAND_ACTIVATE;
258 priv->card_polling_interval = HZ / 10;
259 }
260 else if (priv->waiting_command_mask & ARLAN_COMMAND_RX_ABORT)
261 {
262 if (priv->rx_command_given)
263 {
264 WRITESHMB(arlan->commandByte, ARLAN_COM_RX_ABORT);
265 arlan_interrupt_lancpu(dev);
266 priv->rx_command_given = 0;
267 }
268 priv->waiting_command_mask &= ~ARLAN_COMMAND_RX_ABORT;
269 priv->card_polling_interval = 1;
270 }
271 else if (priv->waiting_command_mask & ARLAN_COMMAND_TX_ABORT)
272 {
273 if (priv->tx_command_given)
274 {
275 WRITESHMB(arlan->commandByte, ARLAN_COM_TX_ABORT);
276 arlan_interrupt_lancpu(dev);
277 priv->tx_command_given = 0;
278 }
279 priv->waiting_command_mask &= ~ARLAN_COMMAND_TX_ABORT;
280 priv->card_polling_interval = 1;
281 }
282 else if (priv->waiting_command_mask & ARLAN_COMMAND_RESET)
283 {
284 priv->under_reset=1;
285 netif_stop_queue (dev);
286
287 arlan_drop_tx(dev);
288 if (priv->tx_command_given || priv->rx_command_given)
289 {
290 printk(KERN_ERR "%s: Reset under tx or rx command \n", dev->name);
291 }
292 netif_stop_queue (dev);
293 if (arlan_debug & ARLAN_DEBUG_RESET)
294 printk(KERN_ERR "%s: Doing chip reset\n", dev->name);
295 priv->lastReset = jiffies;
296 WRITESHM(arlan->commandByte, 0, u_char);
297 /* hold card in reset state */
298 setHardwareReset(dev);
299 /* set reset flag and then release reset */
300 WRITESHM(arlan->resetFlag, 0xff, u_char);
301 clearChannelAttention(dev);
302 clearHardwareReset(dev);
303 priv->card_polling_interval = HZ / 4;
304 priv->waiting_command_mask &= ~ARLAN_COMMAND_RESET;
305 priv->waiting_command_mask |= ARLAN_COMMAND_INT_RACK;
306 // priv->waiting_command_mask |= ARLAN_COMMAND_INT_RENABLE;
307 // priv->waiting_command_mask |= ARLAN_COMMAND_RX;
308 }
309 else if (priv->waiting_command_mask & ARLAN_COMMAND_INT_RACK)
310 {
311 clearHardwareReset(dev);
312 clearClearInterrupt(dev);
313 setClearInterrupt(dev);
314 setInterruptEnable(dev);
315 priv->waiting_command_mask &= ~ARLAN_COMMAND_INT_RACK;
316 priv->waiting_command_mask |= ARLAN_COMMAND_CONF;
317 priv->under_config = 1;
318 priv->under_reset = 0;
319 }
320 else if (priv->waiting_command_mask & ARLAN_COMMAND_INT_RENABLE)
321 {
322 setInterruptEnable(dev);
323 priv->waiting_command_mask &= ~ARLAN_COMMAND_INT_RENABLE;
324 }
325 else if (priv->waiting_command_mask & ARLAN_COMMAND_CONF)
326 {
327 if (priv->tx_command_given || priv->rx_command_given)
328 {
329 printk(KERN_ERR "%s: Reset under tx or rx command \n", dev->name);
330 }
331 arlan_drop_tx(dev);
332 setInterruptEnable(dev);
333 arlan_hw_config(dev);
334 arlan_interrupt_lancpu(dev);
335 priv->waiting_command_mask &= ~ARLAN_COMMAND_CONF;
336 priv->card_polling_interval = HZ / 10;
337 // priv->waiting_command_mask |= ARLAN_COMMAND_INT_RACK;
338 // priv->waiting_command_mask |= ARLAN_COMMAND_INT_ENABLE;
339 priv->waiting_command_mask |= ARLAN_COMMAND_CONF_WAIT;
340 }
341 else if (priv->waiting_command_mask & ARLAN_COMMAND_CONF_WAIT)
342 {
343 if (READSHMB(arlan->configuredStatusFlag) != 0 &&
344 READSHMB(arlan->diagnosticInfo) == 0xff)
345 {
346 priv->waiting_command_mask &= ~ARLAN_COMMAND_CONF_WAIT;
347 priv->waiting_command_mask |= ARLAN_COMMAND_RX;
348 priv->waiting_command_mask |= ARLAN_COMMAND_TBUSY_CLEAR;
349 priv->card_polling_interval = HZ / 10;
350 priv->tx_command_given = 0;
351 priv->under_config = 0;
352 }
353 else
354 {
355 priv->card_polling_interval = 1;
356 if (arlan_debug & ARLAN_DEBUG_TIMING)
357 printk(KERN_ERR "configure delayed \n");
358 }
359 }
360 else if (priv->waiting_command_mask & ARLAN_COMMAND_RX)
361 {
362 if (!registrationBad(dev))
363 {
364 setInterruptEnable(dev);
365 memset_io(arlan->commandParameter, 0, 0xf);
366 WRITESHMB(arlan->commandByte, ARLAN_COM_INT | ARLAN_COM_RX_ENABLE);
367 WRITESHMB(arlan->commandParameter[0], conf->rxParameter);
368 arlan_interrupt_lancpu(dev);
369 priv->rx_command_given = 0; // mnjah, bad
370 priv->waiting_command_mask &= ~ARLAN_COMMAND_RX;
371 priv->card_polling_interval = 1;
372 }
373 else
374 priv->card_polling_interval = 2;
375 }
376 else if (priv->waiting_command_mask & ARLAN_COMMAND_TBUSY_CLEAR)
377 {
378 if ( !registrationBad(dev) &&
379 (netif_queue_stopped(dev) || !netif_running(dev)) )
380 {
381 priv->waiting_command_mask &= ~ARLAN_COMMAND_TBUSY_CLEAR;
382 netif_wake_queue (dev);
383 }
384 }
385 else if (priv->waiting_command_mask & ARLAN_COMMAND_TX)
386 {
387 if (!test_and_set_bit(0, (void *) &priv->tx_command_given))
388 {
389 if (time_after(jiffies,
390 priv->tx_last_sent + us2ticks(conf->rx_tweak1))
391 || time_before(jiffies,
392 priv->last_rx_int_ack_time + us2ticks(conf->rx_tweak2)))
393 {
394 setInterruptEnable(dev);
395 memset_io(arlan->commandParameter, 0, 0xf);
396 WRITESHMB(arlan->commandByte, ARLAN_COM_TX_ENABLE | ARLAN_COM_INT);
397 memcpy_toio(arlan->commandParameter, &TXLAST(dev), 14);
398 // for ( i=1 ; i < 15 ; i++) printk("%02x:",READSHMB(arlan->commandParameter[i]));
399 priv->tx_last_sent = jiffies;
400 arlan_interrupt_lancpu(dev);
401 priv->tx_command_given = 1;
402 priv->waiting_command_mask &= ~ARLAN_COMMAND_TX;
403 priv->card_polling_interval = 1;
404 }
405 else
406 {
407 priv->tx_command_given = 0;
408 priv->card_polling_interval = 1;
409 }
410 }
411 else if (arlan_debug & ARLAN_DEBUG_CHAIN_LOCKS)
412 printk(KERN_ERR "tx command when tx chain locked \n");
413 }
414 else if (priv->waiting_command_mask & ARLAN_COMMAND_NOOPINT)
415 {
416 {
417 WRITESHMB(arlan->commandByte, ARLAN_COM_NOP | ARLAN_COM_INT);
418 }
419 arlan_interrupt_lancpu(dev);
420 priv->waiting_command_mask &= ~ARLAN_COMMAND_NOOPINT;
421 priv->card_polling_interval = HZ / 3;
422 }
423 else if (priv->waiting_command_mask & ARLAN_COMMAND_NOOP)
424 {
425 WRITESHMB(arlan->commandByte, ARLAN_COM_NOP);
426 arlan_interrupt_lancpu(dev);
427 priv->waiting_command_mask &= ~ARLAN_COMMAND_NOOP;
428 priv->card_polling_interval = HZ / 3;
429 }
430 else if (priv->waiting_command_mask & ARLAN_COMMAND_SLOW_POLL)
431 {
432 WRITESHMB(arlan->commandByte, ARLAN_COM_GOTO_SLOW_POLL);
433 arlan_interrupt_lancpu(dev);
434 priv->waiting_command_mask &= ~ARLAN_COMMAND_SLOW_POLL;
435 priv->card_polling_interval = HZ / 3;
436 }
437 else if (priv->waiting_command_mask & ARLAN_COMMAND_POWERDOWN)
438 {
439 setPowerOff(dev);
440 if (arlan_debug & ARLAN_DEBUG_CARD_STATE)
441 printk(KERN_WARNING "%s: Arlan Going Standby\n", dev->name);
442 priv->waiting_command_mask &= ~ARLAN_COMMAND_POWERDOWN;
443 priv->card_polling_interval = 3 * HZ;
444 }
445 arlan_unlock_card_access(dev);
446 for (i = 0; READSHMB(arlan->commandByte) && i < 20; i++)
447 udelay(10);
448 if (READSHMB(arlan->commandByte))
449 if (arlan_debug & ARLAN_DEBUG_CARD_STATE)
450 printk(KERN_ERR "card busy leaving command %lx\n", priv->waiting_command_mask);
451
452 spin_unlock_irqrestore(&priv->lock, flags);
453 ARLAN_DEBUG_EXIT("arlan_command");
454 priv->last_command_buff_free_time = jiffies;
455 return 0;
456
457 card_busy_end:
458 if (time_after(jiffies, priv->last_command_buff_free_time + HZ))
459 priv->waiting_command_mask |= ARLAN_COMMAND_CLEAN_AND_RESET;
460
461 if (arlan_debug & ARLAN_DEBUG_CARD_STATE)
462 printk(KERN_ERR "%s arlan_command card busy end \n", dev->name);
463 spin_unlock_irqrestore(&priv->lock, flags);
464 ARLAN_DEBUG_EXIT("arlan_command");
465 return 1;
466
467 bad_end:
468 printk(KERN_ERR "%s arlan_command bad end \n", dev->name);
469
470 spin_unlock_irqrestore(&priv->lock, flags);
471 ARLAN_DEBUG_EXIT("arlan_command");
472
473 return -1;
474 }
475
476 static inline void arlan_command_process(struct net_device *dev)
477 {
478 struct arlan_private *priv = netdev_priv(dev);
479
480 int times = 0;
481 while (priv->waiting_command_mask && times < 8)
482 {
483 if (priv->waiting_command_mask)
484 {
485 if (arlan_command(dev, 0))
486 break;
487 times++;
488 }
489 /* if long command, we won't repeat trying */ ;
490 if (priv->card_polling_interval > 1)
491 break;
492 times++;
493 }
494 }
495
496
497 static inline void arlan_retransmit_now(struct net_device *dev)
498 {
499 struct arlan_private *priv = netdev_priv(dev);
500
501
502 ARLAN_DEBUG_ENTRY("arlan_retransmit_now");
503 if (TXLAST(dev).offset == 0)
504 {
505 if (TXHEAD(dev).offset)
506 {
507 priv->txLast = 0;
508 IFDEBUG(ARLAN_DEBUG_TX_CHAIN) printk(KERN_DEBUG "TX buff switch to head \n");
509
510 }
511 else if (TXTAIL(dev).offset)
512 {
513 IFDEBUG(ARLAN_DEBUG_TX_CHAIN) printk(KERN_DEBUG "TX buff switch to tail \n");
514 priv->txLast = 1;
515 }
516 else
517 IFDEBUG(ARLAN_DEBUG_TX_CHAIN) printk(KERN_ERR "ReTransmit buff empty");
518 netif_wake_queue (dev);
519 return;
520
521 }
522 arlan_command(dev, ARLAN_COMMAND_TX);
523
524 priv->Conf->driverRetransmissions++;
525 priv->retransmissions++;
526
527 IFDEBUG(ARLAN_DEBUG_TX_CHAIN) printk("Retransmit %d bytes \n", TXLAST(dev).length);
528
529 ARLAN_DEBUG_EXIT("arlan_retransmit_now");
530 }
531
532
533
534 static void arlan_registration_timer(unsigned long data)
535 {
536 struct net_device *dev = (struct net_device *) data;
537 struct arlan_private *priv = netdev_priv(dev);
538 int bh_mark_needed = 0;
539 int next_tick = 1;
540 long lostTime = ((long)jiffies - (long)priv->registrationLastSeen)
541 * (1000/HZ);
542
543 if (registrationBad(dev))
544 {
545 priv->registrationLostCount++;
546 if (lostTime > 7000 && lostTime < 7200)
547 {
548 printk(KERN_NOTICE "%s registration Lost \n", dev->name);
549 }
550 if (lostTime / priv->reRegisterExp > 2000)
551 arlan_command(dev, ARLAN_COMMAND_CLEAN_AND_CONF);
552 if (lostTime / (priv->reRegisterExp) > 3500)
553 arlan_command(dev, ARLAN_COMMAND_CLEAN_AND_RESET);
554 if (priv->reRegisterExp < 400)
555 priv->reRegisterExp += 2;
556 if (lostTime > 7200)
557 {
558 next_tick = HZ;
559 arlan_command(dev, ARLAN_COMMAND_CLEAN_AND_RESET);
560 }
561 }
562 else
563 {
564 if (priv->Conf->registrationMode && lostTime > 10000 &&
565 priv->registrationLostCount)
566 {
567 printk(KERN_NOTICE "%s registration is back after %ld milliseconds\n",
568 dev->name, lostTime);
569 }
570 priv->registrationLastSeen = jiffies;
571 priv->registrationLostCount = 0;
572 priv->reRegisterExp = 1;
573 if (!netif_running(dev) )
574 netif_wake_queue(dev);
575 if (time_after(priv->tx_last_sent,priv->tx_last_cleared) &&
576 time_after(jiffies, priv->tx_last_sent * 5*HZ) ){
577 arlan_command(dev, ARLAN_COMMAND_CLEAN_AND_RESET);
578 priv->tx_last_cleared = jiffies;
579 }
580 }
581
582
583 if (!registrationBad(dev) && priv->ReTransmitRequested)
584 {
585 IFDEBUG(ARLAN_DEBUG_TX_CHAIN)
586 printk(KERN_ERR "Retransmit from timer \n");
587 priv->ReTransmitRequested = 0;
588 arlan_retransmit_now(dev);
589 }
590 if (!registrationBad(dev) &&
591 time_after(jiffies, priv->tx_done_delayed) &&
592 priv->tx_done_delayed != 0)
593 {
594 TXLAST(dev).offset = 0;
595 if (priv->txLast)
596 priv->txLast = 0;
597 else if (TXTAIL(dev).offset)
598 priv->txLast = 1;
599 if (TXLAST(dev).offset)
600 {
601 arlan_retransmit_now(dev);
602 dev->trans_start = jiffies;
603 }
604 if (!(TXHEAD(dev).offset && TXTAIL(dev).offset))
605 {
606 netif_wake_queue (dev);
607 }
608 priv->tx_done_delayed = 0;
609 bh_mark_needed = 1;
610 }
611 if (bh_mark_needed)
612 {
613 netif_wake_queue (dev);
614 }
615 arlan_process_interrupt(dev);
616
617 if (next_tick < priv->card_polling_interval)
618 next_tick = priv->card_polling_interval;
619
620 priv->timer.expires = jiffies + next_tick;
621
622 add_timer(&priv->timer);
623 }
624
625
626 #ifdef ARLAN_DEBUGGING
627
628 static void arlan_print_registers(struct net_device *dev, int line)
629 {
630 struct arlan_private *priv = netdev_priv(dev);
631 volatile struct arlan_shmem *arlan = priv->card;
632
633 u_char hostcpuLock, lancpuLock, controlRegister, cntrlRegImage,
634 txStatus, rxStatus, interruptInProgress, commandByte;
635
636
637 ARLAN_DEBUG_ENTRY("arlan_print_registers");
638 READSHM(interruptInProgress, arlan->interruptInProgress, u_char);
639 READSHM(hostcpuLock, arlan->hostcpuLock, u_char);
640 READSHM(lancpuLock, arlan->lancpuLock, u_char);
641 READSHM(controlRegister, arlan->controlRegister, u_char);
642 READSHM(cntrlRegImage, arlan->cntrlRegImage, u_char);
643 READSHM(txStatus, arlan->txStatus, u_char);
644 READSHM(rxStatus, arlan->rxStatus, u_char);
645 READSHM(commandByte, arlan->commandByte, u_char);
646
647 printk(KERN_WARNING "line %04d IP %02x HL %02x LL %02x CB %02x CR %02x CRI %02x TX %02x RX %02x\n",
648 line, interruptInProgress, hostcpuLock, lancpuLock, commandByte,
649 controlRegister, cntrlRegImage, txStatus, rxStatus);
650
651 ARLAN_DEBUG_EXIT("arlan_print_registers");
652 }
653 #endif
654
655
656 static int arlan_hw_tx(struct net_device *dev, char *buf, int length)
657 {
658 int i;
659
660 struct arlan_private *priv = netdev_priv(dev);
661 volatile struct arlan_shmem __iomem *arlan = priv->card;
662 struct arlan_conf_stru *conf = priv->Conf;
663
664 int tailStarts = 0x800;
665 int headEnds = 0x0;
666
667
668 ARLAN_DEBUG_ENTRY("arlan_hw_tx");
669 if (TXHEAD(dev).offset)
670 headEnds = (((TXHEAD(dev).offset + TXHEAD(dev).length - offsetof(struct arlan_shmem, txBuffer)) / 64) + 1) * 64;
671 if (TXTAIL(dev).offset)
672 tailStarts = 0x800 - (((TXTAIL(dev).offset - offsetof(struct arlan_shmem, txBuffer)) / 64) + 2) * 64;
673
674
675 if (!TXHEAD(dev).offset && length < tailStarts)
676 {
677 IFDEBUG(ARLAN_DEBUG_TX_CHAIN)
678 printk(KERN_ERR "TXHEAD insert, tailStart %d\n", tailStarts);
679
680 TXHEAD(dev).offset =
681 offsetof(struct arlan_shmem, txBuffer);
682 TXHEAD(dev).length = length - ARLAN_FAKE_HDR_LEN;
683 for (i = 0; i < 6; i++)
684 TXHEAD(dev).dest[i] = buf[i];
685 TXHEAD(dev).clear = conf->txClear;
686 TXHEAD(dev).retries = conf->txRetries; /* 0 is use default */
687 TXHEAD(dev).routing = conf->txRouting;
688 TXHEAD(dev).scrambled = conf->txScrambled;
689 memcpy_toio((char __iomem *)arlan + TXHEAD(dev).offset, buf + ARLAN_FAKE_HDR_LEN, TXHEAD(dev).length);
690 }
691 else if (!TXTAIL(dev).offset && length < (0x800 - headEnds))
692 {
693 IFDEBUG(ARLAN_DEBUG_TX_CHAIN)
694 printk(KERN_ERR "TXTAIL insert, headEnd %d\n", headEnds);
695
696 TXTAIL(dev).offset =
697 offsetof(struct arlan_shmem, txBuffer) + 0x800 - (length / 64 + 2) * 64;
698 TXTAIL(dev).length = length - ARLAN_FAKE_HDR_LEN;
699 for (i = 0; i < 6; i++)
700 TXTAIL(dev).dest[i] = buf[i];
701 TXTAIL(dev).clear = conf->txClear;
702 TXTAIL(dev).retries = conf->txRetries;
703 TXTAIL(dev).routing = conf->txRouting;
704 TXTAIL(dev).scrambled = conf->txScrambled;
705 memcpy_toio(((char __iomem *)arlan + TXTAIL(dev).offset), buf + ARLAN_FAKE_HDR_LEN, TXTAIL(dev).length);
706 }
707 else
708 {
709 netif_stop_queue (dev);
710 IFDEBUG(ARLAN_DEBUG_TX_CHAIN)
711 printk(KERN_ERR "TX TAIL & HEAD full, return, tailStart %d headEnd %d\n", tailStarts, headEnds);
712 return -1;
713 }
714 priv->out_bytes += length;
715 priv->out_bytes10 += length;
716 if (conf->measure_rate < 1)
717 conf->measure_rate = 1;
718 if (time_after(jiffies, priv->out_time + conf->measure_rate * HZ))
719 {
720 conf->out_speed = priv->out_bytes / conf->measure_rate;
721 priv->out_bytes = 0;
722 priv->out_time = jiffies;
723 }
724 if (time_after(jiffies, priv->out_time10 + conf->measure_rate * 10*HZ))
725 {
726 conf->out_speed10 = priv->out_bytes10 / (10 * conf->measure_rate);
727 priv->out_bytes10 = 0;
728 priv->out_time10 = jiffies;
729 }
730 if (TXHEAD(dev).offset && TXTAIL(dev).offset)
731 {
732 netif_stop_queue (dev);
733 return 0;
734 }
735 else
736 netif_start_queue (dev);
737
738
739 IFDEBUG(ARLAN_DEBUG_HEADER_DUMP)
740 printk(KERN_WARNING "%s Transmit t %2x:%2x:%2x:%2x:%2x:%2x f %2x:%2x:%2x:%2x:%2x:%2x \n", dev->name,
741 (unsigned char) buf[0], (unsigned char) buf[1], (unsigned char) buf[2], (unsigned char) buf[3],
742 (unsigned char) buf[4], (unsigned char) buf[5], (unsigned char) buf[6], (unsigned char) buf[7],
743 (unsigned char) buf[8], (unsigned char) buf[9], (unsigned char) buf[10], (unsigned char) buf[11]);
744
745 IFDEBUG(ARLAN_DEBUG_TX_CHAIN) printk(KERN_ERR "TX command prepare for buffer %d\n", priv->txLast);
746
747 arlan_command(dev, ARLAN_COMMAND_TX);
748
749 priv->tx_last_sent = jiffies;
750
751 IFDEBUG(ARLAN_DEBUG_TX_CHAIN) printk("%s TX Qued %d bytes \n", dev->name, length);
752
753 ARLAN_DEBUG_EXIT("arlan_hw_tx");
754
755 return 0;
756 }
757
758
759 static int arlan_hw_config(struct net_device *dev)
760 {
761 struct arlan_private *priv = netdev_priv(dev);
762 volatile struct arlan_shmem __iomem *arlan = priv->card;
763 struct arlan_conf_stru *conf = priv->Conf;
764
765 ARLAN_DEBUG_ENTRY("arlan_hw_config");
766
767 printk(KERN_NOTICE "%s arlan configure called \n", dev->name);
768 if (arlan_EEPROM_bad)
769 printk(KERN_NOTICE "arlan configure with eeprom bad option \n");
770
771
772 WRITESHM(arlan->spreadingCode, conf->spreadingCode, u_char);
773 WRITESHM(arlan->channelSet, conf->channelSet, u_char);
774
775 if (arlan_EEPROM_bad)
776 WRITESHM(arlan->defaultChannelSet, conf->channelSet, u_char);
777
778 WRITESHM(arlan->channelNumber, conf->channelNumber, u_char);
779
780 WRITESHM(arlan->scramblingDisable, conf->scramblingDisable, u_char);
781 WRITESHM(arlan->txAttenuation, conf->txAttenuation, u_char);
782
783 WRITESHM(arlan->systemId, conf->systemId, u_int);
784
785 WRITESHM(arlan->maxRetries, conf->maxRetries, u_char);
786 WRITESHM(arlan->receiveMode, conf->receiveMode, u_char);
787 WRITESHM(arlan->priority, conf->priority, u_char);
788 WRITESHM(arlan->rootOrRepeater, conf->rootOrRepeater, u_char);
789 WRITESHM(arlan->SID, conf->SID, u_int);
790
791 WRITESHM(arlan->registrationMode, conf->registrationMode, u_char);
792
793 WRITESHM(arlan->registrationFill, conf->registrationFill, u_char);
794 WRITESHM(arlan->localTalkAddress, conf->localTalkAddress, u_char);
795 WRITESHM(arlan->codeFormat, conf->codeFormat, u_char);
796 WRITESHM(arlan->numChannels, conf->numChannels, u_char);
797 WRITESHM(arlan->channel1, conf->channel1, u_char);
798 WRITESHM(arlan->channel2, conf->channel2, u_char);
799 WRITESHM(arlan->channel3, conf->channel3, u_char);
800 WRITESHM(arlan->channel4, conf->channel4, u_char);
801 WRITESHM(arlan->radioNodeId, conf->radioNodeId, u_short);
802 WRITESHM(arlan->SID, conf->SID, u_int);
803 WRITESHM(arlan->waitTime, conf->waitTime, u_short);
804 WRITESHM(arlan->lParameter, conf->lParameter, u_short);
805 memcpy_toio(&(arlan->_15), &(conf->_15), 3);
806 WRITESHM(arlan->_15, conf->_15, u_short);
807 WRITESHM(arlan->headerSize, conf->headerSize, u_short);
808 if (arlan_EEPROM_bad)
809 WRITESHM(arlan->hardwareType, conf->hardwareType, u_char);
810 WRITESHM(arlan->radioType, conf->radioType, u_char);
811 if (arlan_EEPROM_bad)
812 WRITESHM(arlan->radioModule, conf->radioType, u_char);
813
814 memcpy_toio(arlan->encryptionKey + keyStart, encryptionKey, 8);
815 memcpy_toio(arlan->name, conf->siteName, 16);
816
817 WRITESHMB(arlan->commandByte, ARLAN_COM_INT | ARLAN_COM_CONF); /* do configure */
818 memset_io(arlan->commandParameter, 0, 0xf); /* 0xf */
819 memset_io(arlan->commandParameter + 1, 0, 2);
820 if (conf->writeEEPROM)
821 {
822 memset_io(arlan->commandParameter, conf->writeEEPROM, 1);
823 // conf->writeEEPROM=0;
824 }
825 if (conf->registrationMode && conf->registrationInterrupts)
826 memset_io(arlan->commandParameter + 3, 1, 1);
827 else
828 memset_io(arlan->commandParameter + 3, 0, 1);
829
830 priv->irq_test_done = 0;
831
832 if (conf->tx_queue_len)
833 dev->tx_queue_len = conf->tx_queue_len;
834 udelay(100);
835
836 ARLAN_DEBUG_EXIT("arlan_hw_config");
837 return 0;
838 }
839
840
841 static int arlan_read_card_configuration(struct net_device *dev)
842 {
843 u_char tlx415;
844 struct arlan_private *priv = netdev_priv(dev);
845 volatile struct arlan_shmem __iomem *arlan = priv->card;
846 struct arlan_conf_stru *conf = priv->Conf;
847
848 ARLAN_DEBUG_ENTRY("arlan_read_card_configuration");
849
850 if (radioNodeId == radioNodeIdUNKNOWN)
851 {
852 READSHM(conf->radioNodeId, arlan->radioNodeId, u_short);
853 }
854 else
855 conf->radioNodeId = radioNodeId;
856
857 if (SID == SIDUNKNOWN)
858 {
859 READSHM(conf->SID, arlan->SID, u_int);
860 }
861 else conf->SID = SID;
862
863 if (spreadingCode == spreadingCodeUNKNOWN)
864 {
865 READSHM(conf->spreadingCode, arlan->spreadingCode, u_char);
866 }
867 else
868 conf->spreadingCode = spreadingCode;
869
870 if (channelSet == channelSetUNKNOWN)
871 {
872 READSHM(conf->channelSet, arlan->channelSet, u_char);
873 }
874 else conf->channelSet = channelSet;
875
876 if (channelNumber == channelNumberUNKNOWN)
877 {
878 READSHM(conf->channelNumber, arlan->channelNumber, u_char);
879 }
880 else conf->channelNumber = channelNumber;
881
882 READSHM(conf->scramblingDisable, arlan->scramblingDisable, u_char);
883 READSHM(conf->txAttenuation, arlan->txAttenuation, u_char);
884
885 if (systemId == systemIdUNKNOWN)
886 {
887 READSHM(conf->systemId, arlan->systemId, u_int);
888 }
889 else conf->systemId = systemId;
890
891 READSHM(conf->maxDatagramSize, arlan->maxDatagramSize, u_short);
892 READSHM(conf->maxFrameSize, arlan->maxFrameSize, u_short);
893 READSHM(conf->maxRetries, arlan->maxRetries, u_char);
894 READSHM(conf->receiveMode, arlan->receiveMode, u_char);
895 READSHM(conf->priority, arlan->priority, u_char);
896 READSHM(conf->rootOrRepeater, arlan->rootOrRepeater, u_char);
897
898 if (SID == SIDUNKNOWN)
899 {
900 READSHM(conf->SID, arlan->SID, u_int);
901 }
902 else conf->SID = SID;
903
904 if (registrationMode == registrationModeUNKNOWN)
905 {
906 READSHM(conf->registrationMode, arlan->registrationMode, u_char);
907 }
908 else conf->registrationMode = registrationMode;
909
910 READSHM(conf->registrationFill, arlan->registrationFill, u_char);
911 READSHM(conf->localTalkAddress, arlan->localTalkAddress, u_char);
912 READSHM(conf->codeFormat, arlan->codeFormat, u_char);
913 READSHM(conf->numChannels, arlan->numChannels, u_char);
914 READSHM(conf->channel1, arlan->channel1, u_char);
915 READSHM(conf->channel2, arlan->channel2, u_char);
916 READSHM(conf->channel3, arlan->channel3, u_char);
917 READSHM(conf->channel4, arlan->channel4, u_char);
918 READSHM(conf->waitTime, arlan->waitTime, u_short);
919 READSHM(conf->lParameter, arlan->lParameter, u_short);
920 READSHM(conf->_15, arlan->_15, u_short);
921 READSHM(conf->headerSize, arlan->headerSize, u_short);
922 READSHM(conf->hardwareType, arlan->hardwareType, u_char);
923 READSHM(conf->radioType, arlan->radioModule, u_char);
924
925 if (conf->radioType == 0)
926 conf->radioType = 0xc;
927
928 WRITESHM(arlan->configStatus, 0xA5, u_char);
929 READSHM(tlx415, arlan->configStatus, u_char);
930
931 if (tlx415 != 0xA5)
932 printk(KERN_INFO "%s tlx415 chip \n", dev->name);
933
934 conf->txClear = 0;
935 conf->txRetries = 1;
936 conf->txRouting = 1;
937 conf->txScrambled = 0;
938 conf->rxParameter = 1;
939 conf->txTimeoutMs = 4000;
940 conf->waitCardTimeout = 100000;
941 conf->receiveMode = ARLAN_RCV_CLEAN;
942 memcpy_fromio(conf->siteName, arlan->name, 16);
943 conf->siteName[16] = '\0';
944 conf->retries = retries;
945 conf->tx_delay_ms = tx_delay_ms;
946 conf->ReTransmitPacketMaxSize = 200;
947 conf->waitReTransmitPacketMaxSize = 200;
948 conf->txAckTimeoutMs = 900;
949 conf->fastReTransCount = 3;
950
951 ARLAN_DEBUG_EXIT("arlan_read_card_configuration");
952
953 return 0;
954 }
955
956
957 static int lastFoundAt = 0xbe000;
958
959
960 /*
961 * This is the real probe routine. Linux has a history of friendly device
962 * probes on the ISA bus. A good device probes avoids doing writes, and
963 * verifies that the correct device exists and functions.
964 */
965 #define ARLAN_SHMEM_SIZE 0x2000
966 static int __init arlan_check_fingerprint(unsigned long memaddr)
967 {
968 static const char probeText[] = "TELESYSTEM SLW INC. ARLAN \0";
969 volatile struct arlan_shmem __iomem *arlan = (struct arlan_shmem *) memaddr;
970 unsigned long paddr = virt_to_phys((void *) memaddr);
971 char tempBuf[49];
972
973 ARLAN_DEBUG_ENTRY("arlan_check_fingerprint");
974
975 if (!request_mem_region(paddr, ARLAN_SHMEM_SIZE, "arlan")) {
976 // printk(KERN_WARNING "arlan: memory region %lx excluded from probing \n",paddr);
977 return -ENODEV;
978 }
979
980 memcpy_fromio(tempBuf, arlan->textRegion, 29);
981 tempBuf[30] = 0;
982
983 /* check for card at this address */
984 if (0 != strncmp(tempBuf, probeText, 29)){
985 release_mem_region(paddr, ARLAN_SHMEM_SIZE);
986 return -ENODEV;
987 }
988
989 // printk(KERN_INFO "arlan found at 0x%x \n",memaddr);
990 ARLAN_DEBUG_EXIT("arlan_check_fingerprint");
991
992 return 0;
993 }
994
995 static int arlan_change_mtu(struct net_device *dev, int new_mtu)
996 {
997 struct arlan_private *priv = netdev_priv(dev);
998 struct arlan_conf_stru *conf = priv->Conf;
999
1000 ARLAN_DEBUG_ENTRY("arlan_change_mtu");
1001 if (new_mtu > 2032)
1002 return -EINVAL;
1003 dev->mtu = new_mtu;
1004 if (new_mtu < 256)
1005 new_mtu = 256; /* cards book suggests 1600 */
1006 conf->maxDatagramSize = new_mtu;
1007 conf->maxFrameSize = new_mtu + 48;
1008
1009 arlan_command(dev, ARLAN_COMMAND_CLEAN_AND_CONF);
1010 printk(KERN_NOTICE "%s mtu changed to %d \n", dev->name, new_mtu);
1011
1012 ARLAN_DEBUG_EXIT("arlan_change_mtu");
1013
1014 return 0;
1015 }
1016
1017 static int arlan_mac_addr(struct net_device *dev, void *p)
1018 {
1019 struct sockaddr *addr = p;
1020
1021
1022 ARLAN_DEBUG_ENTRY("arlan_mac_addr");
1023 return -EINVAL;
1024
1025 if (!netif_running(dev))
1026 return -EBUSY;
1027 memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1028
1029 ARLAN_DEBUG_EXIT("arlan_mac_addr");
1030 return 0;
1031 }
1032
1033
1034
1035 static int __init arlan_setup_device(struct net_device *dev, int num)
1036 {
1037 struct arlan_private *ap = netdev_priv(dev);
1038 int err;
1039
1040 ARLAN_DEBUG_ENTRY("arlan_setup_device");
1041
1042 ap->conf = (struct arlan_shmem *)(ap+1);
1043
1044 dev->tx_queue_len = tx_queue_len;
1045 dev->open = arlan_open;
1046 dev->stop = arlan_close;
1047 dev->hard_start_xmit = arlan_tx;
1048 dev->get_stats = arlan_statistics;
1049 dev->set_multicast_list = arlan_set_multicast;
1050 dev->change_mtu = arlan_change_mtu;
1051 dev->set_mac_address = arlan_mac_addr;
1052 dev->tx_timeout = arlan_tx_timeout;
1053 dev->watchdog_timeo = 3*HZ;
1054
1055 ap->irq_test_done = 0;
1056 ap->Conf = &arlan_conf[num];
1057
1058 ap->Conf->pre_Command_Wait = 40;
1059 ap->Conf->rx_tweak1 = 30;
1060 ap->Conf->rx_tweak2 = 0;
1061
1062
1063 err = register_netdev(dev);
1064 if (err) {
1065 release_mem_region(virt_to_phys((void *) dev->mem_start),
1066 ARLAN_SHMEM_SIZE);
1067 free_netdev(dev);
1068 return err;
1069 }
1070 arlan_device[num] = dev;
1071 ARLAN_DEBUG_EXIT("arlan_setup_device");
1072 return 0;
1073 }
1074
1075 static int __init arlan_probe_here(struct net_device *dev,
1076 unsigned long memaddr)
1077 {
1078 struct arlan_private *ap = netdev_priv(dev);
1079
1080 ARLAN_DEBUG_ENTRY("arlan_probe_here");
1081
1082 if (arlan_check_fingerprint(memaddr))
1083 return -ENODEV;
1084
1085 printk(KERN_NOTICE "%s: Arlan found at %x, \n ", dev->name,
1086 (int) virt_to_phys((void*)memaddr));
1087
1088 ap->card = (void *) memaddr;
1089 dev->mem_start = memaddr;
1090 dev->mem_end = memaddr + ARLAN_SHMEM_SIZE-1;
1091
1092 if (dev->irq < 2)
1093 {
1094 READSHM(dev->irq, ap->card->irqLevel, u_char);
1095 } else if (dev->irq == 2)
1096 dev->irq = 9;
1097
1098 arlan_read_card_configuration(dev);
1099
1100 ARLAN_DEBUG_EXIT("arlan_probe_here");
1101 return 0;
1102 }
1103
1104
1105 static int arlan_open(struct net_device *dev)
1106 {
1107 struct arlan_private *priv = netdev_priv(dev);
1108 volatile struct arlan_shmem __iomem *arlan = priv->card;
1109 int ret = 0;
1110
1111 ARLAN_DEBUG_ENTRY("arlan_open");
1112
1113 ret = request_irq(dev->irq, &arlan_interrupt, 0, dev->name, dev);
1114 if (ret)
1115 {
1116 printk(KERN_ERR "%s: unable to get IRQ %d .\n",
1117 dev->name, dev->irq);
1118 return ret;
1119 }
1120
1121
1122 priv->bad = 0;
1123 priv->lastReset = 0;
1124 priv->reset = 0;
1125 memcpy_fromio(dev->dev_addr, arlan->lanCardNodeId, 6);
1126 memset(dev->broadcast, 0xff, 6);
1127 dev->tx_queue_len = tx_queue_len;
1128 priv->interrupt_processing_active = 0;
1129 spin_lock_init(&priv->lock);
1130
1131 netif_start_queue (dev);
1132
1133 priv->registrationLostCount = 0;
1134 priv->registrationLastSeen = jiffies;
1135 priv->txLast = 0;
1136 priv->tx_command_given = 0;
1137 priv->rx_command_given = 0;
1138
1139 priv->reRegisterExp = 1;
1140 priv->tx_last_sent = jiffies - 1;
1141 priv->tx_last_cleared = jiffies;
1142 priv->Conf->writeEEPROM = 0;
1143 priv->Conf->registrationInterrupts = 1;
1144
1145 init_timer(&priv->timer);
1146 priv->timer.expires = jiffies + HZ / 10;
1147 priv->timer.data = (unsigned long) dev;
1148 priv->timer.function = &arlan_registration_timer; /* timer handler */
1149
1150 arlan_command(dev, ARLAN_COMMAND_POWERUP | ARLAN_COMMAND_LONG_WAIT_NOW);
1151 mdelay(200);
1152 add_timer(&priv->timer);
1153
1154 ARLAN_DEBUG_EXIT("arlan_open");
1155 return 0;
1156 }
1157
1158
1159 static void arlan_tx_timeout (struct net_device *dev)
1160 {
1161 printk(KERN_ERR "%s: arlan transmit timed out, kernel decided\n", dev->name);
1162 /* Try to restart the adaptor. */
1163 arlan_command(dev, ARLAN_COMMAND_CLEAN_AND_RESET);
1164 // dev->trans_start = jiffies;
1165 // netif_start_queue (dev);
1166 }
1167
1168
1169 static int arlan_tx(struct sk_buff *skb, struct net_device *dev)
1170 {
1171 short length;
1172 unsigned char *buf;
1173
1174 ARLAN_DEBUG_ENTRY("arlan_tx");
1175
1176 length = ETH_ZLEN < skb->len ? skb->len : ETH_ZLEN;
1177 buf = skb->data;
1178
1179 if (length + 0x12 > 0x800) {
1180 printk(KERN_ERR "TX RING overflow \n");
1181 netif_stop_queue (dev);
1182 }
1183
1184 if (arlan_hw_tx(dev, buf, length) == -1)
1185 goto bad_end;
1186
1187 dev->trans_start = jiffies;
1188
1189 dev_kfree_skb(skb);
1190
1191 arlan_process_interrupt(dev);
1192 ARLAN_DEBUG_EXIT("arlan_tx");
1193 return 0;
1194
1195 bad_end:
1196 arlan_process_interrupt(dev);
1197 netif_stop_queue (dev);
1198 ARLAN_DEBUG_EXIT("arlan_tx");
1199 return 1;
1200 }
1201
1202
1203 static inline int DoNotReTransmitCrap(struct net_device *dev)
1204 {
1205 struct arlan_private *priv = netdev_priv(dev);
1206
1207 if (TXLAST(dev).length < priv->Conf->ReTransmitPacketMaxSize)
1208 return 1;
1209 return 0;
1210
1211 }
1212
1213 static inline int DoNotWaitReTransmitCrap(struct net_device *dev)
1214 {
1215 struct arlan_private *priv = netdev_priv(dev);
1216
1217 if (TXLAST(dev).length < priv->Conf->waitReTransmitPacketMaxSize)
1218 return 1;
1219 return 0;
1220 }
1221
1222 static inline void arlan_queue_retransmit(struct net_device *dev)
1223 {
1224 struct arlan_private *priv = netdev_priv(dev);
1225
1226 ARLAN_DEBUG_ENTRY("arlan_queue_retransmit");
1227
1228 if (DoNotWaitReTransmitCrap(dev))
1229 {
1230 arlan_drop_tx(dev);
1231 } else
1232 priv->ReTransmitRequested++;
1233
1234 ARLAN_DEBUG_EXIT("arlan_queue_retransmit");
1235 }
1236
1237 static inline void RetryOrFail(struct net_device *dev)
1238 {
1239 struct arlan_private *priv = netdev_priv(dev);
1240
1241 ARLAN_DEBUG_ENTRY("RetryOrFail");
1242
1243 if (priv->retransmissions > priv->Conf->retries ||
1244 DoNotReTransmitCrap(dev))
1245 {
1246 arlan_drop_tx(dev);
1247 }
1248 else if (priv->bad <= priv->Conf->fastReTransCount)
1249 {
1250 arlan_retransmit_now(dev);
1251 }
1252 else arlan_queue_retransmit(dev);
1253
1254 ARLAN_DEBUG_EXIT("RetryOrFail");
1255 }
1256
1257
1258 static void arlan_tx_done_interrupt(struct net_device *dev, int status)
1259 {
1260 struct arlan_private *priv = netdev_priv(dev);
1261
1262 ARLAN_DEBUG_ENTRY("arlan_tx_done_interrupt");
1263
1264 priv->tx_last_cleared = jiffies;
1265 priv->tx_command_given = 0;
1266 switch (status)
1267 {
1268 case 1:
1269 {
1270 IFDEBUG(ARLAN_DEBUG_TX_CHAIN)
1271 printk("arlan intr: transmit OK\n");
1272 priv->stats.tx_packets++;
1273 priv->bad = 0;
1274 priv->reset = 0;
1275 priv->retransmissions = 0;
1276 if (priv->Conf->tx_delay_ms)
1277 {
1278 priv->tx_done_delayed = jiffies + (priv->Conf->tx_delay_ms * HZ) / 1000 + 1;
1279 }
1280 else
1281 {
1282 TXLAST(dev).offset = 0;
1283 if (priv->txLast)
1284 priv->txLast = 0;
1285 else if (TXTAIL(dev).offset)
1286 priv->txLast = 1;
1287 if (TXLAST(dev).offset)
1288 {
1289 arlan_retransmit_now(dev);
1290 dev->trans_start = jiffies;
1291 }
1292 if (!TXHEAD(dev).offset || !TXTAIL(dev).offset)
1293 {
1294 netif_wake_queue (dev);
1295 }
1296 }
1297 }
1298 break;
1299
1300 case 2:
1301 {
1302 IFDEBUG(ARLAN_DEBUG_TX_CHAIN)
1303 printk("arlan intr: transmit timed out\n");
1304 priv->bad += 1;
1305 //arlan_queue_retransmit(dev);
1306 RetryOrFail(dev);
1307 }
1308 break;
1309
1310 case 3:
1311 {
1312 IFDEBUG(ARLAN_DEBUG_TX_CHAIN)
1313 printk("arlan intr: transmit max retries\n");
1314 priv->bad += 1;
1315 priv->reset = 0;
1316 //arlan_queue_retransmit(dev);
1317 RetryOrFail(dev);
1318 }
1319 break;
1320
1321 case 4:
1322 {
1323 IFDEBUG(ARLAN_DEBUG_TX_CHAIN)
1324 printk("arlan intr: transmit aborted\n");
1325 priv->bad += 1;
1326 arlan_queue_retransmit(dev);
1327 //RetryOrFail(dev);
1328 }
1329 break;
1330
1331 case 5:
1332 {
1333 IFDEBUG(ARLAN_DEBUG_TX_CHAIN)
1334 printk("arlan intr: transmit not registered\n");
1335 priv->bad += 1;
1336 //debug=101;
1337 arlan_queue_retransmit(dev);
1338 }
1339 break;
1340
1341 case 6:
1342 {
1343 IFDEBUG(ARLAN_DEBUG_TX_CHAIN)
1344 printk("arlan intr: transmit destination full\n");
1345 priv->bad += 1;
1346 priv->reset = 0;
1347 //arlan_drop_tx(dev);
1348 arlan_queue_retransmit(dev);
1349 }
1350 break;
1351
1352 case 7:
1353 {
1354 IFDEBUG(ARLAN_DEBUG_TX_CHAIN)
1355 printk("arlan intr: transmit unknown ack\n");
1356 priv->bad += 1;
1357 priv->reset = 0;
1358 arlan_queue_retransmit(dev);
1359 }
1360 break;
1361
1362 case 8:
1363 {
1364 IFDEBUG(ARLAN_DEBUG_TX_CHAIN)
1365 printk("arlan intr: transmit dest mail box full\n");
1366 priv->bad += 1;
1367 priv->reset = 0;
1368 //arlan_drop_tx(dev);
1369 arlan_queue_retransmit(dev);
1370 }
1371 break;
1372
1373 case 9:
1374 {
1375 IFDEBUG(ARLAN_DEBUG_TX_CHAIN)
1376 printk("arlan intr: transmit root dest not reg.\n");
1377 priv->bad += 1;
1378 priv->reset = 1;
1379 //arlan_drop_tx(dev);
1380 arlan_queue_retransmit(dev);
1381 }
1382 break;
1383
1384 default:
1385 {
1386 printk(KERN_ERR "arlan intr: transmit status unknown\n");
1387 priv->bad += 1;
1388 priv->reset = 1;
1389 arlan_drop_tx(dev);
1390 }
1391 }
1392
1393 ARLAN_DEBUG_EXIT("arlan_tx_done_interrupt");
1394 }
1395
1396
1397 static void arlan_rx_interrupt(struct net_device *dev, u_char rxStatus, u_short rxOffset, u_short pkt_len)
1398 {
1399 char *skbtmp;
1400 int i = 0;
1401
1402 struct arlan_private *priv = netdev_priv(dev);
1403 volatile struct arlan_shmem __iomem *arlan = priv->card;
1404 struct arlan_conf_stru *conf = priv->Conf;
1405
1406
1407 ARLAN_DEBUG_ENTRY("arlan_rx_interrupt");
1408 // by spec, not WRITESHMB(arlan->rxStatus,0x00);
1409 // prohibited here arlan_command(dev, ARLAN_COMMAND_RX);
1410
1411 if (pkt_len < 10 || pkt_len > 2048)
1412 {
1413 printk(KERN_WARNING "%s: got too short or long packet, len %d \n", dev->name, pkt_len);
1414 return;
1415 }
1416 if (rxOffset + pkt_len > 0x2000)
1417 {
1418 printk("%s: got too long packet, len %d offset %x\n", dev->name, pkt_len, rxOffset);
1419 return;
1420 }
1421 priv->in_bytes += pkt_len;
1422 priv->in_bytes10 += pkt_len;
1423 if (conf->measure_rate < 1)
1424 conf->measure_rate = 1;
1425 if (time_after(jiffies, priv->in_time + conf->measure_rate * HZ))
1426 {
1427 conf->in_speed = priv->in_bytes / conf->measure_rate;
1428 priv->in_bytes = 0;
1429 priv->in_time = jiffies;
1430 }
1431 if (time_after(jiffies, priv->in_time10 + conf->measure_rate * 10*HZ))
1432 {
1433 conf->in_speed10 = priv->in_bytes10 / (10 * conf->measure_rate);
1434 priv->in_bytes10 = 0;
1435 priv->in_time10 = jiffies;
1436 }
1437 DEBUGSHM(1, "arlan rcv pkt rxStatus= %d ", arlan->rxStatus, u_char);
1438 switch (rxStatus)
1439 {
1440 case 1:
1441 case 2:
1442 case 3:
1443 {
1444 /* Malloc up new buffer. */
1445 struct sk_buff *skb;
1446
1447 DEBUGSHM(50, "arlan recv pkt offs=%d\n", arlan->rxOffset, u_short);
1448 DEBUGSHM(1, "arlan rxFrmType = %d \n", arlan->rxFrmType, u_char);
1449 DEBUGSHM(1, KERN_INFO "arlan rx scrambled = %d \n", arlan->scrambled, u_char);
1450
1451 /* here we do multicast filtering to avoid slow 8-bit memcopy */
1452 #ifdef ARLAN_MULTICAST
1453 if (!(dev->flags & IFF_ALLMULTI) &&
1454 !(dev->flags & IFF_PROMISC) &&
1455 dev->mc_list)
1456 {
1457 char hw_dst_addr[6];
1458 struct dev_mc_list *dmi = dev->mc_list;
1459 int i;
1460
1461 memcpy_fromio(hw_dst_addr, arlan->ultimateDestAddress, 6);
1462 if (hw_dst_addr[0] == 0x01)
1463 {
1464 if (mdebug)
1465 if (hw_dst_addr[1] == 0x00)
1466 printk(KERN_ERR "%s mcast 0x0100 \n", dev->name);
1467 else if (hw_dst_addr[1] == 0x40)
1468 printk(KERN_ERR "%s m/bcast 0x0140 \n", dev->name);
1469 while (dmi)
1470 { if (dmi->dmi_addrlen == 6)
1471 {
1472 DECLARE_MAC_BUF(mac);
1473 if (arlan_debug & ARLAN_DEBUG_HEADER_DUMP)
1474 printk(KERN_ERR "%s mcl %s\n",
1475 dev->name, print_mac(mac, dmi->dmi_addr));
1476 for (i = 0; i < 6; i++)
1477 if (dmi->dmi_addr[i] != hw_dst_addr[i])
1478 break;
1479 if (i == 6)
1480 break;
1481 }
1482 else
1483 printk(KERN_ERR "%s: invalid multicast address length given.\n", dev->name);
1484 dmi = dmi->next;
1485 }
1486 /* we reach here if multicast filtering is on and packet
1487 * is multicast and not for receive */
1488 goto end_of_interrupt;
1489 }
1490 }
1491 #endif // ARLAN_MULTICAST
1492 /* multicast filtering ends here */
1493 pkt_len += ARLAN_FAKE_HDR_LEN;
1494
1495 skb = dev_alloc_skb(pkt_len + 4);
1496 if (skb == NULL)
1497 {
1498 printk(KERN_ERR "%s: Memory squeeze, dropping packet.\n", dev->name);
1499 priv->stats.rx_dropped++;
1500 break;
1501 }
1502 skb_reserve(skb, 2);
1503 skbtmp = skb_put(skb, pkt_len);
1504
1505 memcpy_fromio(skbtmp + ARLAN_FAKE_HDR_LEN, ((char __iomem *) arlan) + rxOffset, pkt_len - ARLAN_FAKE_HDR_LEN);
1506 memcpy_fromio(skbtmp, arlan->ultimateDestAddress, 6);
1507 memcpy_fromio(skbtmp + 6, arlan->rxSrc, 6);
1508 WRITESHMB(arlan->rxStatus, 0x00);
1509 arlan_command(dev, ARLAN_COMMAND_RX);
1510
1511 IFDEBUG(ARLAN_DEBUG_HEADER_DUMP)
1512 {
1513 char immedDestAddress[6];
1514 char immedSrcAddress[6];
1515 DECLARE_MAC_BUF(mac);
1516 DECLARE_MAC_BUF(mac2);
1517 DECLARE_MAC_BUF(mac3);
1518 DECLARE_MAC_BUF(mac4);
1519 memcpy_fromio(immedDestAddress, arlan->immedDestAddress, 6);
1520 memcpy_fromio(immedSrcAddress, arlan->immedSrcAddress, 6);
1521
1522 printk(KERN_WARNING "%s t %s f %s imd %s ims %s\n",
1523 dev->name, print_mac(mac, skbtmp),
1524 print_mac(mac2, &skbtmp[6]),
1525 print_mac(mac3, immedDestAddress),
1526 print_mac(mac4, immedSrcAddress));
1527 }
1528 skb->protocol = eth_type_trans(skb, dev);
1529 IFDEBUG(ARLAN_DEBUG_HEADER_DUMP)
1530 if (skb->protocol != 0x608 && skb->protocol != 0x8)
1531 {
1532 for (i = 0; i <= 22; i++)
1533 printk("%02x:", (u_char) skbtmp[i + 12]);
1534 printk(KERN_ERR "\n");
1535 printk(KERN_WARNING "arlan kernel pkt type trans %x \n", skb->protocol);
1536 }
1537 netif_rx(skb);
1538 dev->last_rx = jiffies;
1539 priv->stats.rx_packets++;
1540 priv->stats.rx_bytes += pkt_len;
1541 }
1542 break;
1543
1544 default:
1545 printk(KERN_ERR "arlan intr: received unknown status\n");
1546 priv->stats.rx_crc_errors++;
1547 break;
1548 }
1549 ARLAN_DEBUG_EXIT("arlan_rx_interrupt");
1550 }
1551
1552 static void arlan_process_interrupt(struct net_device *dev)
1553 {
1554 struct arlan_private *priv = netdev_priv(dev);
1555 volatile struct arlan_shmem __iomem *arlan = priv->card;
1556 u_char rxStatus = READSHMB(arlan->rxStatus);
1557 u_char txStatus = READSHMB(arlan->txStatus);
1558 u_short rxOffset = READSHMS(arlan->rxOffset);
1559 u_short pkt_len = READSHMS(arlan->rxLength);
1560 int interrupt_count = 0;
1561
1562 ARLAN_DEBUG_ENTRY("arlan_process_interrupt");
1563
1564 if (test_and_set_bit(0, (void *) &priv->interrupt_processing_active))
1565 {
1566 if (arlan_debug & ARLAN_DEBUG_CHAIN_LOCKS)
1567 printk(KERN_ERR "interrupt chain reentering \n");
1568 goto end_int_process;
1569 }
1570 while ((rxStatus || txStatus || priv->interrupt_ack_requested)
1571 && (interrupt_count < 5))
1572 {
1573 if (rxStatus)
1574 priv->last_rx_int_ack_time = jiffies;
1575
1576 arlan_command(dev, ARLAN_COMMAND_INT_ACK);
1577 arlan_command(dev, ARLAN_COMMAND_INT_ENABLE);
1578
1579 IFDEBUG(ARLAN_DEBUG_INTERRUPT)
1580 printk(KERN_ERR "%s: got IRQ rx %x tx %x comm %x rxOff %x rxLen %x \n",
1581 dev->name, rxStatus, txStatus, READSHMB(arlan->commandByte),
1582 rxOffset, pkt_len);
1583
1584 if (rxStatus == 0 && txStatus == 0)
1585 {
1586 if (priv->irq_test_done)
1587 {
1588 if (!registrationBad(dev))
1589 IFDEBUG(ARLAN_DEBUG_INTERRUPT) printk(KERN_ERR "%s unknown interrupt(nop? regLost ?) reason tx %d rx %d ",
1590 dev->name, txStatus, rxStatus);
1591 } else {
1592 IFDEBUG(ARLAN_DEBUG_INTERRUPT)
1593 printk(KERN_INFO "%s irq $%d test OK \n", dev->name, dev->irq);
1594
1595 }
1596 priv->interrupt_ack_requested = 0;
1597 goto ends;
1598 }
1599 if (txStatus != 0)
1600 {
1601 WRITESHMB(arlan->txStatus, 0x00);
1602 arlan_tx_done_interrupt(dev, txStatus);
1603 goto ends;
1604 }
1605 if (rxStatus == 1 || rxStatus == 2)
1606 { /* a packet waiting */
1607 arlan_rx_interrupt(dev, rxStatus, rxOffset, pkt_len);
1608 goto ends;
1609 }
1610 if (rxStatus > 2 && rxStatus < 0xff)
1611 {
1612 WRITESHMB(arlan->rxStatus, 0x00);
1613 printk(KERN_ERR "%s unknown rxStatus reason tx %d rx %d ",
1614 dev->name, txStatus, rxStatus);
1615 goto ends;
1616 }
1617 if (rxStatus == 0xff)
1618 {
1619 WRITESHMB(arlan->rxStatus, 0x00);
1620 arlan_command(dev, ARLAN_COMMAND_RX);
1621 if (registrationBad(dev))
1622 netif_device_detach(dev);
1623 if (!registrationBad(dev))
1624 {
1625 priv->registrationLastSeen = jiffies;
1626 if (!netif_queue_stopped(dev) && !priv->under_reset && !priv->under_config)
1627 netif_wake_queue (dev);
1628 }
1629 goto ends;
1630 }
1631 ends:
1632
1633 arlan_command_process(dev);
1634
1635 rxStatus = READSHMB(arlan->rxStatus);
1636 txStatus = READSHMB(arlan->txStatus);
1637 rxOffset = READSHMS(arlan->rxOffset);
1638 pkt_len = READSHMS(arlan->rxLength);
1639
1640
1641 priv->irq_test_done = 1;
1642
1643 interrupt_count++;
1644 }
1645 priv->interrupt_processing_active = 0;
1646
1647 end_int_process:
1648 arlan_command_process(dev);
1649
1650 ARLAN_DEBUG_EXIT("arlan_process_interrupt");
1651 return;
1652 }
1653
1654 static irqreturn_t arlan_interrupt(int irq, void *dev_id)
1655 {
1656 struct net_device *dev = dev_id;
1657 struct arlan_private *priv = netdev_priv(dev);
1658 volatile struct arlan_shmem __iomem *arlan = priv->card;
1659 u_char rxStatus = READSHMB(arlan->rxStatus);
1660 u_char txStatus = READSHMB(arlan->txStatus);
1661
1662 ARLAN_DEBUG_ENTRY("arlan_interrupt");
1663
1664
1665 if (!rxStatus && !txStatus)
1666 priv->interrupt_ack_requested++;
1667
1668 arlan_process_interrupt(dev);
1669
1670 priv->irq_test_done = 1;
1671
1672 ARLAN_DEBUG_EXIT("arlan_interrupt");
1673 return IRQ_HANDLED;
1674
1675 }
1676
1677
1678 static int arlan_close(struct net_device *dev)
1679 {
1680 struct arlan_private *priv = netdev_priv(dev);
1681
1682 ARLAN_DEBUG_ENTRY("arlan_close");
1683
1684 del_timer_sync(&priv->timer);
1685
1686 arlan_command(dev, ARLAN_COMMAND_POWERDOWN);
1687
1688 IFDEBUG(ARLAN_DEBUG_STARTUP)
1689 printk(KERN_NOTICE "%s: Closing device\n", dev->name);
1690
1691 netif_stop_queue(dev);
1692 free_irq(dev->irq, dev);
1693
1694 ARLAN_DEBUG_EXIT("arlan_close");
1695 return 0;
1696 }
1697
1698 #ifdef ARLAN_DEBUGGING
1699 static long alignLong(volatile u_char * ptr)
1700 {
1701 long ret;
1702 memcpy_fromio(&ret, (void *) ptr, 4);
1703 return ret;
1704 }
1705 #endif
1706
1707 /*
1708 * Get the current statistics.
1709 * This may be called with the card open or closed.
1710 */
1711
1712 static struct net_device_stats *arlan_statistics(struct net_device *dev)
1713 {
1714 struct arlan_private *priv = netdev_priv(dev);
1715 volatile struct arlan_shmem __iomem *arlan = priv->card;
1716
1717
1718 ARLAN_DEBUG_ENTRY("arlan_statistics");
1719
1720 /* Update the statistics from the device registers. */
1721
1722 READSHM(priv->stats.collisions, arlan->numReTransmissions, u_int);
1723 READSHM(priv->stats.rx_crc_errors, arlan->numCRCErrors, u_int);
1724 READSHM(priv->stats.rx_dropped, arlan->numFramesDiscarded, u_int);
1725 READSHM(priv->stats.rx_fifo_errors, arlan->numRXBufferOverflows, u_int);
1726 READSHM(priv->stats.rx_frame_errors, arlan->numReceiveFramesLost, u_int);
1727 READSHM(priv->stats.rx_over_errors, arlan->numRXOverruns, u_int);
1728 READSHM(priv->stats.rx_packets, arlan->numDatagramsReceived, u_int);
1729 READSHM(priv->stats.tx_aborted_errors, arlan->numAbortErrors, u_int);
1730 READSHM(priv->stats.tx_carrier_errors, arlan->numStatusTimeouts, u_int);
1731 READSHM(priv->stats.tx_dropped, arlan->numDatagramsDiscarded, u_int);
1732 READSHM(priv->stats.tx_fifo_errors, arlan->numTXUnderruns, u_int);
1733 READSHM(priv->stats.tx_packets, arlan->numDatagramsTransmitted, u_int);
1734 READSHM(priv->stats.tx_window_errors, arlan->numHoldOffs, u_int);
1735
1736 ARLAN_DEBUG_EXIT("arlan_statistics");
1737
1738 return &priv->stats;
1739 }
1740
1741
1742 static void arlan_set_multicast(struct net_device *dev)
1743 {
1744 struct arlan_private *priv = netdev_priv(dev);
1745 volatile struct arlan_shmem __iomem *arlan = priv->card;
1746 struct arlan_conf_stru *conf = priv->Conf;
1747 int board_conf_needed = 0;
1748
1749
1750 ARLAN_DEBUG_ENTRY("arlan_set_multicast");
1751
1752 if (dev->flags & IFF_PROMISC)
1753 {
1754 unsigned char recMode;
1755 READSHM(recMode, arlan->receiveMode, u_char);
1756 conf->receiveMode = (ARLAN_RCV_PROMISC | ARLAN_RCV_CONTROL);
1757 if (conf->receiveMode != recMode)
1758 board_conf_needed = 1;
1759 }
1760 else
1761 {
1762 /* turn off promiscuous mode */
1763 unsigned char recMode;
1764 READSHM(recMode, arlan->receiveMode, u_char);
1765 conf->receiveMode = ARLAN_RCV_CLEAN | ARLAN_RCV_CONTROL;
1766 if (conf->receiveMode != recMode)
1767 board_conf_needed = 1;
1768 }
1769 if (board_conf_needed)
1770 arlan_command(dev, ARLAN_COMMAND_CONF);
1771
1772 ARLAN_DEBUG_EXIT("arlan_set_multicast");
1773 }
1774
1775
1776 struct net_device * __init arlan_probe(int unit)
1777 {
1778 struct net_device *dev;
1779 int err;
1780 int m;
1781
1782 ARLAN_DEBUG_ENTRY("arlan_probe");
1783
1784 if (arlans_found == MAX_ARLANS)
1785 return ERR_PTR(-ENODEV);
1786
1787 /*
1788 * Reserve space for local data and a copy of the shared memory
1789 * that is used by the /proc interface.
1790 */
1791 dev = alloc_etherdev(sizeof(struct arlan_private)
1792 + sizeof(struct arlan_shmem));
1793 if (!dev)
1794 return ERR_PTR(-ENOMEM);
1795
1796 if (unit >= 0) {
1797 sprintf(dev->name, "eth%d", unit);
1798 netdev_boot_setup_check(dev);
1799
1800 if (dev->mem_start) {
1801 if (arlan_probe_here(dev, dev->mem_start) == 0)
1802 goto found;
1803 goto not_found;
1804 }
1805
1806 }
1807
1808
1809 for (m = (int)phys_to_virt(lastFoundAt) + ARLAN_SHMEM_SIZE;
1810 m <= (int)phys_to_virt(0xDE000);
1811 m += ARLAN_SHMEM_SIZE)
1812 {
1813 if (arlan_probe_here(dev, m) == 0)
1814 {
1815 lastFoundAt = (int)virt_to_phys((void*)m);
1816 goto found;
1817 }
1818 }
1819
1820 if (lastFoundAt == 0xbe000)
1821 printk(KERN_ERR "arlan: No Arlan devices found \n");
1822
1823 not_found:
1824 free_netdev(dev);
1825 return ERR_PTR(-ENODEV);
1826
1827 found:
1828 err = arlan_setup_device(dev, arlans_found);
1829 if (err)
1830 dev = ERR_PTR(err);
1831 else if (!arlans_found++)
1832 printk(KERN_INFO "Arlan driver %s\n", arlan_version);
1833
1834 return dev;
1835 }
1836
1837 #ifdef MODULE
1838 int __init init_module(void)
1839 {
1840 int i = 0;
1841
1842 ARLAN_DEBUG_ENTRY("init_module");
1843
1844 if (channelSet != channelSetUNKNOWN || channelNumber != channelNumberUNKNOWN || systemId != systemIdUNKNOWN)
1845 return -EINVAL;
1846
1847 for (i = 0; i < MAX_ARLANS; i++) {
1848 struct net_device *dev = arlan_probe(i);
1849
1850 if (IS_ERR(dev))
1851 return PTR_ERR(dev);
1852 }
1853 init_arlan_proc();
1854 printk(KERN_INFO "Arlan driver %s\n", arlan_version);
1855 ARLAN_DEBUG_EXIT("init_module");
1856 return 0;
1857 }
1858
1859
1860 void __exit cleanup_module(void)
1861 {
1862 int i = 0;
1863 struct net_device *dev;
1864
1865 ARLAN_DEBUG_ENTRY("cleanup_module");
1866
1867 IFDEBUG(ARLAN_DEBUG_SHUTDOWN)
1868 printk(KERN_INFO "arlan: unloading module\n");
1869
1870 cleanup_arlan_proc();
1871
1872 for (i = 0; i < MAX_ARLANS; i++)
1873 {
1874 dev = arlan_device[i];
1875 if (dev) {
1876 arlan_command(dev, ARLAN_COMMAND_POWERDOWN );
1877
1878 unregister_netdev(dev);
1879 release_mem_region(virt_to_phys((void *) dev->mem_start),
1880 ARLAN_SHMEM_SIZE);
1881 free_netdev(dev);
1882 arlan_device[i] = NULL;
1883 }
1884 }
1885
1886 ARLAN_DEBUG_EXIT("cleanup_module");
1887 }
1888
1889
1890 #endif
1891 MODULE_LICENSE("GPL");
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