?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
[PATCH] fix semaphore handling in __unregister_chrdev_region
[linux/fpc-iii.git] / drivers / isdn / hisax / isac.c
blob20b9499529528c6d8cfa37ca7c1eda643ab613e0
1 /* $Id: isac.c,v 1.31.2.3 2004/01/13 14:31:25 keil Exp $
2 *
3 * ISAC specific routines
4 *
5 * Author Karsten Keil
6 * Copyright by Karsten Keil <keil@isdn4linux.de>
7 *
8 * This software may be used and distributed according to the terms
9 * of the GNU General Public License, incorporated herein by reference.
10 *
11 * For changes and modifications please read
12 * Documentation/isdn/HiSax.cert
13 *
14 */
15
16 #include "hisax.h"
17 #include "isac.h"
18 #include "arcofi.h"
19 #include "isdnl1.h"
20 #include <linux/interrupt.h>
21 #include <linux/init.h>
22
23 #define DBUSY_TIMER_VALUE 80
24 #define ARCOFI_USE 1
25
26 static char *ISACVer[] __devinitdata =
27 {"2086/2186 V1.1", "2085 B1", "2085 B2",
28 "2085 V2.3"};
29
30 void
31 ISACVersion(struct IsdnCardState *cs, char *s)
32 {
33 int val;
34
35 val = cs->readisac(cs, ISAC_RBCH);
36 printk(KERN_INFO "%s ISAC version (%x): %s\n", s, val, ISACVer[(val >> 5) & 3]);
37 }
38
39 static void
40 ph_command(struct IsdnCardState *cs, unsigned int command)
41 {
42 if (cs->debug & L1_DEB_ISAC)
43 debugl1(cs, "ph_command %x", command);
44 cs->writeisac(cs, ISAC_CIX0, (command << 2) | 3);
45 }
46
47
48 static void
49 isac_new_ph(struct IsdnCardState *cs)
50 {
51 switch (cs->dc.isac.ph_state) {
52 case (ISAC_IND_RS):
53 case (ISAC_IND_EI):
54 ph_command(cs, ISAC_CMD_DUI);
55 l1_msg(cs, HW_RESET | INDICATION, NULL);
56 break;
57 case (ISAC_IND_DID):
58 l1_msg(cs, HW_DEACTIVATE | CONFIRM, NULL);
59 break;
60 case (ISAC_IND_DR):
61 l1_msg(cs, HW_DEACTIVATE | INDICATION, NULL);
62 break;
63 case (ISAC_IND_PU):
64 l1_msg(cs, HW_POWERUP | CONFIRM, NULL);
65 break;
66 case (ISAC_IND_RSY):
67 l1_msg(cs, HW_RSYNC | INDICATION, NULL);
68 break;
69 case (ISAC_IND_ARD):
70 l1_msg(cs, HW_INFO2 | INDICATION, NULL);
71 break;
72 case (ISAC_IND_AI8):
73 l1_msg(cs, HW_INFO4_P8 | INDICATION, NULL);
74 break;
75 case (ISAC_IND_AI10):
76 l1_msg(cs, HW_INFO4_P10 | INDICATION, NULL);
77 break;
78 default:
79 break;
80 }
81 }
82
83 static void
84 isac_bh(struct IsdnCardState *cs)
85 {
86 struct PStack *stptr;
87
88 if (!cs)
89 return;
90 if (test_and_clear_bit(D_CLEARBUSY, &cs->event)) {
91 if (cs->debug)
92 debugl1(cs, "D-Channel Busy cleared");
93 stptr = cs->stlist;
94 while (stptr != NULL) {
95 stptr->l1.l1l2(stptr, PH_PAUSE | CONFIRM, NULL);
96 stptr = stptr->next;
97 }
98 }
99 if (test_and_clear_bit(D_L1STATECHANGE, &cs->event))
100 isac_new_ph(cs);
101 if (test_and_clear_bit(D_RCVBUFREADY, &cs->event))
102 DChannel_proc_rcv(cs);
103 if (test_and_clear_bit(D_XMTBUFREADY, &cs->event))
104 DChannel_proc_xmt(cs);
105 #if ARCOFI_USE
106 if (!test_bit(HW_ARCOFI, &cs->HW_Flags))
107 return;
108 if (test_and_clear_bit(D_RX_MON1, &cs->event))
109 arcofi_fsm(cs, ARCOFI_RX_END, NULL);
110 if (test_and_clear_bit(D_TX_MON1, &cs->event))
111 arcofi_fsm(cs, ARCOFI_TX_END, NULL);
112 #endif
113 }
114
115 void
116 isac_empty_fifo(struct IsdnCardState *cs, int count)
117 {
118 u_char *ptr;
119
120 if ((cs->debug & L1_DEB_ISAC) && !(cs->debug & L1_DEB_ISAC_FIFO))
121 debugl1(cs, "isac_empty_fifo");
122
123 if ((cs->rcvidx + count) >= MAX_DFRAME_LEN_L1) {
124 if (cs->debug & L1_DEB_WARN)
125 debugl1(cs, "isac_empty_fifo overrun %d",
126 cs->rcvidx + count);
127 cs->writeisac(cs, ISAC_CMDR, 0x80);
128 cs->rcvidx = 0;
129 return;
130 }
131 ptr = cs->rcvbuf + cs->rcvidx;
132 cs->rcvidx += count;
133 cs->readisacfifo(cs, ptr, count);
134 cs->writeisac(cs, ISAC_CMDR, 0x80);
135 if (cs->debug & L1_DEB_ISAC_FIFO) {
136 char *t = cs->dlog;
137
138 t += sprintf(t, "isac_empty_fifo cnt %d", count);
139 QuickHex(t, ptr, count);
140 debugl1(cs, cs->dlog);
141 }
142 }
143
144 static void
145 isac_fill_fifo(struct IsdnCardState *cs)
146 {
147 int count, more;
148 u_char *ptr;
149
150 if ((cs->debug & L1_DEB_ISAC) && !(cs->debug & L1_DEB_ISAC_FIFO))
151 debugl1(cs, "isac_fill_fifo");
152
153 if (!cs->tx_skb)
154 return;
155
156 count = cs->tx_skb->len;
157 if (count <= 0)
158 return;
159
160 more = 0;
161 if (count > 32) {
162 more = !0;
163 count = 32;
164 }
165 ptr = cs->tx_skb->data;
166 skb_pull(cs->tx_skb, count);
167 cs->tx_cnt += count;
168 cs->writeisacfifo(cs, ptr, count);
169 cs->writeisac(cs, ISAC_CMDR, more ? 0x8 : 0xa);
170 if (test_and_set_bit(FLG_DBUSY_TIMER, &cs->HW_Flags)) {
171 debugl1(cs, "isac_fill_fifo dbusytimer running");
172 del_timer(&cs->dbusytimer);
173 }
174 init_timer(&cs->dbusytimer);
175 cs->dbusytimer.expires = jiffies + ((DBUSY_TIMER_VALUE * HZ)/1000);
176 add_timer(&cs->dbusytimer);
177 if (cs->debug & L1_DEB_ISAC_FIFO) {
178 char *t = cs->dlog;
179
180 t += sprintf(t, "isac_fill_fifo cnt %d", count);
181 QuickHex(t, ptr, count);
182 debugl1(cs, cs->dlog);
183 }
184 }
185
186 void
187 isac_interrupt(struct IsdnCardState *cs, u_char val)
188 {
189 u_char exval, v1;
190 struct sk_buff *skb;
191 unsigned int count;
192
193 if (cs->debug & L1_DEB_ISAC)
194 debugl1(cs, "ISAC interrupt %x", val);
195 if (val & 0x80) { /* RME */
196 exval = cs->readisac(cs, ISAC_RSTA);
197 if ((exval & 0x70) != 0x20) {
198 if (exval & 0x40) {
199 if (cs->debug & L1_DEB_WARN)
200 debugl1(cs, "ISAC RDO");
201 #ifdef ERROR_STATISTIC
202 cs->err_rx++;
203 #endif
204 }
205 if (!(exval & 0x20)) {
206 if (cs->debug & L1_DEB_WARN)
207 debugl1(cs, "ISAC CRC error");
208 #ifdef ERROR_STATISTIC
209 cs->err_crc++;
210 #endif
211 }
212 cs->writeisac(cs, ISAC_CMDR, 0x80);
213 } else {
214 count = cs->readisac(cs, ISAC_RBCL) & 0x1f;
215 if (count == 0)
216 count = 32;
217 isac_empty_fifo(cs, count);
218 if ((count = cs->rcvidx) > 0) {
219 cs->rcvidx = 0;
220 if (!(skb = alloc_skb(count, GFP_ATOMIC)))
221 printk(KERN_WARNING "HiSax: D receive out of memory\n");
222 else {
223 memcpy(skb_put(skb, count), cs->rcvbuf, count);
224 skb_queue_tail(&cs->rq, skb);
225 }
226 }
227 }
228 cs->rcvidx = 0;
229 schedule_event(cs, D_RCVBUFREADY);
230 }
231 if (val & 0x40) { /* RPF */
232 isac_empty_fifo(cs, 32);
233 }
234 if (val & 0x20) { /* RSC */
235 /* never */
236 if (cs->debug & L1_DEB_WARN)
237 debugl1(cs, "ISAC RSC interrupt");
238 }
239 if (val & 0x10) { /* XPR */
240 if (test_and_clear_bit(FLG_DBUSY_TIMER, &cs->HW_Flags))
241 del_timer(&cs->dbusytimer);
242 if (test_and_clear_bit(FLG_L1_DBUSY, &cs->HW_Flags))
243 schedule_event(cs, D_CLEARBUSY);
244 if (cs->tx_skb) {
245 if (cs->tx_skb->len) {
246 isac_fill_fifo(cs);
247 goto afterXPR;
248 } else {
249 dev_kfree_skb_irq(cs->tx_skb);
250 cs->tx_cnt = 0;
251 cs->tx_skb = NULL;
252 }
253 }
254 if ((cs->tx_skb = skb_dequeue(&cs->sq))) {
255 cs->tx_cnt = 0;
256 isac_fill_fifo(cs);
257 } else
258 schedule_event(cs, D_XMTBUFREADY);
259 }
260 afterXPR:
261 if (val & 0x04) { /* CISQ */
262 exval = cs->readisac(cs, ISAC_CIR0);
263 if (cs->debug & L1_DEB_ISAC)
264 debugl1(cs, "ISAC CIR0 %02X", exval );
265 if (exval & 2) {
266 cs->dc.isac.ph_state = (exval >> 2) & 0xf;
267 if (cs->debug & L1_DEB_ISAC)
268 debugl1(cs, "ph_state change %x", cs->dc.isac.ph_state);
269 schedule_event(cs, D_L1STATECHANGE);
270 }
271 if (exval & 1) {
272 exval = cs->readisac(cs, ISAC_CIR1);
273 if (cs->debug & L1_DEB_ISAC)
274 debugl1(cs, "ISAC CIR1 %02X", exval );
275 }
276 }
277 if (val & 0x02) { /* SIN */
278 /* never */
279 if (cs->debug & L1_DEB_WARN)
280 debugl1(cs, "ISAC SIN interrupt");
281 }
282 if (val & 0x01) { /* EXI */
283 exval = cs->readisac(cs, ISAC_EXIR);
284 if (cs->debug & L1_DEB_WARN)
285 debugl1(cs, "ISAC EXIR %02x", exval);
286 if (exval & 0x80) { /* XMR */
287 debugl1(cs, "ISAC XMR");
288 printk(KERN_WARNING "HiSax: ISAC XMR\n");
289 }
290 if (exval & 0x40) { /* XDU */
291 debugl1(cs, "ISAC XDU");
292 printk(KERN_WARNING "HiSax: ISAC XDU\n");
293 #ifdef ERROR_STATISTIC
294 cs->err_tx++;
295 #endif
296 if (test_and_clear_bit(FLG_DBUSY_TIMER, &cs->HW_Flags))
297 del_timer(&cs->dbusytimer);
298 if (test_and_clear_bit(FLG_L1_DBUSY, &cs->HW_Flags))
299 schedule_event(cs, D_CLEARBUSY);
300 if (cs->tx_skb) { /* Restart frame */
301 skb_push(cs->tx_skb, cs->tx_cnt);
302 cs->tx_cnt = 0;
303 isac_fill_fifo(cs);
304 } else {
305 printk(KERN_WARNING "HiSax: ISAC XDU no skb\n");
306 debugl1(cs, "ISAC XDU no skb");
307 }
308 }
309 if (exval & 0x04) { /* MOS */
310 v1 = cs->readisac(cs, ISAC_MOSR);
311 if (cs->debug & L1_DEB_MONITOR)
312 debugl1(cs, "ISAC MOSR %02x", v1);
313 #if ARCOFI_USE
314 if (v1 & 0x08) {
315 if (!cs->dc.isac.mon_rx) {
316 if (!(cs->dc.isac.mon_rx = kmalloc(MAX_MON_FRAME, GFP_ATOMIC))) {
317 if (cs->debug & L1_DEB_WARN)
318 debugl1(cs, "ISAC MON RX out of memory!");
319 cs->dc.isac.mocr &= 0xf0;
320 cs->dc.isac.mocr |= 0x0a;
321 cs->writeisac(cs, ISAC_MOCR, cs->dc.isac.mocr);
322 goto afterMONR0;
323 } else
324 cs->dc.isac.mon_rxp = 0;
325 }
326 if (cs->dc.isac.mon_rxp >= MAX_MON_FRAME) {
327 cs->dc.isac.mocr &= 0xf0;
328 cs->dc.isac.mocr |= 0x0a;
329 cs->writeisac(cs, ISAC_MOCR, cs->dc.isac.mocr);
330 cs->dc.isac.mon_rxp = 0;
331 if (cs->debug & L1_DEB_WARN)
332 debugl1(cs, "ISAC MON RX overflow!");
333 goto afterMONR0;
334 }
335 cs->dc.isac.mon_rx[cs->dc.isac.mon_rxp++] = cs->readisac(cs, ISAC_MOR0);
336 if (cs->debug & L1_DEB_MONITOR)
337 debugl1(cs, "ISAC MOR0 %02x", cs->dc.isac.mon_rx[cs->dc.isac.mon_rxp -1]);
338 if (cs->dc.isac.mon_rxp == 1) {
339 cs->dc.isac.mocr |= 0x04;
340 cs->writeisac(cs, ISAC_MOCR, cs->dc.isac.mocr);
341 }
342 }
343 afterMONR0:
344 if (v1 & 0x80) {
345 if (!cs->dc.isac.mon_rx) {
346 if (!(cs->dc.isac.mon_rx = kmalloc(MAX_MON_FRAME, GFP_ATOMIC))) {
347 if (cs->debug & L1_DEB_WARN)
348 debugl1(cs, "ISAC MON RX out of memory!");
349 cs->dc.isac.mocr &= 0x0f;
350 cs->dc.isac.mocr |= 0xa0;
351 cs->writeisac(cs, ISAC_MOCR, cs->dc.isac.mocr);
352 goto afterMONR1;
353 } else
354 cs->dc.isac.mon_rxp = 0;
355 }
356 if (cs->dc.isac.mon_rxp >= MAX_MON_FRAME) {
357 cs->dc.isac.mocr &= 0x0f;
358 cs->dc.isac.mocr |= 0xa0;
359 cs->writeisac(cs, ISAC_MOCR, cs->dc.isac.mocr);
360 cs->dc.isac.mon_rxp = 0;
361 if (cs->debug & L1_DEB_WARN)
362 debugl1(cs, "ISAC MON RX overflow!");
363 goto afterMONR1;
364 }
365 cs->dc.isac.mon_rx[cs->dc.isac.mon_rxp++] = cs->readisac(cs, ISAC_MOR1);
366 if (cs->debug & L1_DEB_MONITOR)
367 debugl1(cs, "ISAC MOR1 %02x", cs->dc.isac.mon_rx[cs->dc.isac.mon_rxp -1]);
368 cs->dc.isac.mocr |= 0x40;
369 cs->writeisac(cs, ISAC_MOCR, cs->dc.isac.mocr);
370 }
371 afterMONR1:
372 if (v1 & 0x04) {
373 cs->dc.isac.mocr &= 0xf0;
374 cs->writeisac(cs, ISAC_MOCR, cs->dc.isac.mocr);
375 cs->dc.isac.mocr |= 0x0a;
376 cs->writeisac(cs, ISAC_MOCR, cs->dc.isac.mocr);
377 schedule_event(cs, D_RX_MON0);
378 }
379 if (v1 & 0x40) {
380 cs->dc.isac.mocr &= 0x0f;
381 cs->writeisac(cs, ISAC_MOCR, cs->dc.isac.mocr);
382 cs->dc.isac.mocr |= 0xa0;
383 cs->writeisac(cs, ISAC_MOCR, cs->dc.isac.mocr);
384 schedule_event(cs, D_RX_MON1);
385 }
386 if (v1 & 0x02) {
387 if ((!cs->dc.isac.mon_tx) || (cs->dc.isac.mon_txc &&
388 (cs->dc.isac.mon_txp >= cs->dc.isac.mon_txc) &&
389 !(v1 & 0x08))) {
390 cs->dc.isac.mocr &= 0xf0;
391 cs->writeisac(cs, ISAC_MOCR, cs->dc.isac.mocr);
392 cs->dc.isac.mocr |= 0x0a;
393 cs->writeisac(cs, ISAC_MOCR, cs->dc.isac.mocr);
394 if (cs->dc.isac.mon_txc &&
395 (cs->dc.isac.mon_txp >= cs->dc.isac.mon_txc))
396 schedule_event(cs, D_TX_MON0);
397 goto AfterMOX0;
398 }
399 if (cs->dc.isac.mon_txc && (cs->dc.isac.mon_txp >= cs->dc.isac.mon_txc)) {
400 schedule_event(cs, D_TX_MON0);
401 goto AfterMOX0;
402 }
403 cs->writeisac(cs, ISAC_MOX0,
404 cs->dc.isac.mon_tx[cs->dc.isac.mon_txp++]);
405 if (cs->debug & L1_DEB_MONITOR)
406 debugl1(cs, "ISAC %02x -> MOX0", cs->dc.isac.mon_tx[cs->dc.isac.mon_txp -1]);
407 }
408 AfterMOX0:
409 if (v1 & 0x20) {
410 if ((!cs->dc.isac.mon_tx) || (cs->dc.isac.mon_txc &&
411 (cs->dc.isac.mon_txp >= cs->dc.isac.mon_txc) &&
412 !(v1 & 0x80))) {
413 cs->dc.isac.mocr &= 0x0f;
414 cs->writeisac(cs, ISAC_MOCR, cs->dc.isac.mocr);
415 cs->dc.isac.mocr |= 0xa0;
416 cs->writeisac(cs, ISAC_MOCR, cs->dc.isac.mocr);
417 if (cs->dc.isac.mon_txc &&
418 (cs->dc.isac.mon_txp >= cs->dc.isac.mon_txc))
419 schedule_event(cs, D_TX_MON1);
420 goto AfterMOX1;
421 }
422 if (cs->dc.isac.mon_txc && (cs->dc.isac.mon_txp >= cs->dc.isac.mon_txc)) {
423 schedule_event(cs, D_TX_MON1);
424 goto AfterMOX1;
425 }
426 cs->writeisac(cs, ISAC_MOX1,
427 cs->dc.isac.mon_tx[cs->dc.isac.mon_txp++]);
428 if (cs->debug & L1_DEB_MONITOR)
429 debugl1(cs, "ISAC %02x -> MOX1", cs->dc.isac.mon_tx[cs->dc.isac.mon_txp -1]);
430 }
431 AfterMOX1:;
432 #endif
433 }
434 }
435 }
436
437 static void
438 ISAC_l1hw(struct PStack *st, int pr, void *arg)
439 {
440 struct IsdnCardState *cs = (struct IsdnCardState *) st->l1.hardware;
441 struct sk_buff *skb = arg;
442 u_long flags;
443 int val;
444
445 switch (pr) {
446 case (PH_DATA |REQUEST):
447 if (cs->debug & DEB_DLOG_HEX)
448 LogFrame(cs, skb->data, skb->len);
449 if (cs->debug & DEB_DLOG_VERBOSE)
450 dlogframe(cs, skb, 0);
451 spin_lock_irqsave(&cs->lock, flags);
452 if (cs->tx_skb) {
453 skb_queue_tail(&cs->sq, skb);
454 #ifdef L2FRAME_DEBUG /* psa */
455 if (cs->debug & L1_DEB_LAPD)
456 Logl2Frame(cs, skb, "PH_DATA Queued", 0);
457 #endif
458 } else {
459 cs->tx_skb = skb;
460 cs->tx_cnt = 0;
461 #ifdef L2FRAME_DEBUG /* psa */
462 if (cs->debug & L1_DEB_LAPD)
463 Logl2Frame(cs, skb, "PH_DATA", 0);
464 #endif
465 isac_fill_fifo(cs);
466 }
467 spin_unlock_irqrestore(&cs->lock, flags);
468 break;
469 case (PH_PULL |INDICATION):
470 spin_lock_irqsave(&cs->lock, flags);
471 if (cs->tx_skb) {
472 if (cs->debug & L1_DEB_WARN)
473 debugl1(cs, " l2l1 tx_skb exist this shouldn't happen");
474 skb_queue_tail(&cs->sq, skb);
475 } else {
476 if (cs->debug & DEB_DLOG_HEX)
477 LogFrame(cs, skb->data, skb->len);
478 if (cs->debug & DEB_DLOG_VERBOSE)
479 dlogframe(cs, skb, 0);
480 cs->tx_skb = skb;
481 cs->tx_cnt = 0;
482 #ifdef L2FRAME_DEBUG /* psa */
483 if (cs->debug & L1_DEB_LAPD)
484 Logl2Frame(cs, skb, "PH_DATA_PULLED", 0);
485 #endif
486 isac_fill_fifo(cs);
487 }
488 spin_unlock_irqrestore(&cs->lock, flags);
489 break;
490 case (PH_PULL | REQUEST):
491 #ifdef L2FRAME_DEBUG /* psa */
492 if (cs->debug & L1_DEB_LAPD)
493 debugl1(cs, "-> PH_REQUEST_PULL");
494 #endif
495 if (!cs->tx_skb) {
496 test_and_clear_bit(FLG_L1_PULL_REQ, &st->l1.Flags);
497 st->l1.l1l2(st, PH_PULL | CONFIRM, NULL);
498 } else
499 test_and_set_bit(FLG_L1_PULL_REQ, &st->l1.Flags);
500 break;
501 case (HW_RESET | REQUEST):
502 spin_lock_irqsave(&cs->lock, flags);
503 if ((cs->dc.isac.ph_state == ISAC_IND_EI) ||
504 (cs->dc.isac.ph_state == ISAC_IND_DR) ||
505 (cs->dc.isac.ph_state == ISAC_IND_RS))
506 ph_command(cs, ISAC_CMD_TIM);
507 else
508 ph_command(cs, ISAC_CMD_RS);
509 spin_unlock_irqrestore(&cs->lock, flags);
510 break;
511 case (HW_ENABLE | REQUEST):
512 spin_lock_irqsave(&cs->lock, flags);
513 ph_command(cs, ISAC_CMD_TIM);
514 spin_unlock_irqrestore(&cs->lock, flags);
515 break;
516 case (HW_INFO3 | REQUEST):
517 spin_lock_irqsave(&cs->lock, flags);
518 ph_command(cs, ISAC_CMD_AR8);
519 spin_unlock_irqrestore(&cs->lock, flags);
520 break;
521 case (HW_TESTLOOP | REQUEST):
522 spin_lock_irqsave(&cs->lock, flags);
523 val = 0;
524 if (1 & (long) arg)
525 val |= 0x0c;
526 if (2 & (long) arg)
527 val |= 0x3;
528 if (test_bit(HW_IOM1, &cs->HW_Flags)) {
529 /* IOM 1 Mode */
530 if (!val) {
531 cs->writeisac(cs, ISAC_SPCR, 0xa);
532 cs->writeisac(cs, ISAC_ADF1, 0x2);
533 } else {
534 cs->writeisac(cs, ISAC_SPCR, val);
535 cs->writeisac(cs, ISAC_ADF1, 0xa);
536 }
537 } else {
538 /* IOM 2 Mode */
539 cs->writeisac(cs, ISAC_SPCR, val);
540 if (val)
541 cs->writeisac(cs, ISAC_ADF1, 0x8);
542 else
543 cs->writeisac(cs, ISAC_ADF1, 0x0);
544 }
545 spin_unlock_irqrestore(&cs->lock, flags);
546 break;
547 case (HW_DEACTIVATE | RESPONSE):
548 skb_queue_purge(&cs->rq);
549 skb_queue_purge(&cs->sq);
550 if (cs->tx_skb) {
551 dev_kfree_skb_any(cs->tx_skb);
552 cs->tx_skb = NULL;
553 }
554 if (test_and_clear_bit(FLG_DBUSY_TIMER, &cs->HW_Flags))
555 del_timer(&cs->dbusytimer);
556 if (test_and_clear_bit(FLG_L1_DBUSY, &cs->HW_Flags))
557 schedule_event(cs, D_CLEARBUSY);
558 break;
559 default:
560 if (cs->debug & L1_DEB_WARN)
561 debugl1(cs, "isac_l1hw unknown %04x", pr);
562 break;
563 }
564 }
565
566 void
567 setstack_isac(struct PStack *st, struct IsdnCardState *cs)
568 {
569 st->l1.l1hw = ISAC_l1hw;
570 }
571
572 void
573 DC_Close_isac(struct IsdnCardState *cs) {
574 if (cs->dc.isac.mon_rx) {
575 kfree(cs->dc.isac.mon_rx);
576 cs->dc.isac.mon_rx = NULL;
577 }
578 if (cs->dc.isac.mon_tx) {
579 kfree(cs->dc.isac.mon_tx);
580 cs->dc.isac.mon_tx = NULL;
581 }
582 }
583
584 static void
585 dbusy_timer_handler(struct IsdnCardState *cs)
586 {
587 struct PStack *stptr;
588 int rbch, star;
589
590 if (test_bit(FLG_DBUSY_TIMER, &cs->HW_Flags)) {
591 rbch = cs->readisac(cs, ISAC_RBCH);
592 star = cs->readisac(cs, ISAC_STAR);
593 if (cs->debug)
594 debugl1(cs, "D-Channel Busy RBCH %02x STAR %02x",
595 rbch, star);
596 if (rbch & ISAC_RBCH_XAC) { /* D-Channel Busy */
597 test_and_set_bit(FLG_L1_DBUSY, &cs->HW_Flags);
598 stptr = cs->stlist;
599 while (stptr != NULL) {
600 stptr->l1.l1l2(stptr, PH_PAUSE | INDICATION, NULL);
601 stptr = stptr->next;
602 }
603 } else {
604 /* discard frame; reset transceiver */
605 test_and_clear_bit(FLG_DBUSY_TIMER, &cs->HW_Flags);
606 if (cs->tx_skb) {
607 dev_kfree_skb_any(cs->tx_skb);
608 cs->tx_cnt = 0;
609 cs->tx_skb = NULL;
610 } else {
611 printk(KERN_WARNING "HiSax: ISAC D-Channel Busy no skb\n");
612 debugl1(cs, "D-Channel Busy no skb");
613 }
614 cs->writeisac(cs, ISAC_CMDR, 0x01); /* Transmitter reset */
615 cs->irq_func(cs->irq, cs, NULL);
616 }
617 }
618 }
619
620 void __devinit
621 initisac(struct IsdnCardState *cs)
622 {
623 cs->setstack_d = setstack_isac;
624 cs->DC_Close = DC_Close_isac;
625 cs->dc.isac.mon_tx = NULL;
626 cs->dc.isac.mon_rx = NULL;
627 cs->writeisac(cs, ISAC_MASK, 0xff);
628 cs->dc.isac.mocr = 0xaa;
629 if (test_bit(HW_IOM1, &cs->HW_Flags)) {
630 /* IOM 1 Mode */
631 cs->writeisac(cs, ISAC_ADF2, 0x0);
632 cs->writeisac(cs, ISAC_SPCR, 0xa);
633 cs->writeisac(cs, ISAC_ADF1, 0x2);
634 cs->writeisac(cs, ISAC_STCR, 0x70);
635 cs->writeisac(cs, ISAC_MODE, 0xc9);
636 } else {
637 /* IOM 2 Mode */
638 if (!cs->dc.isac.adf2)
639 cs->dc.isac.adf2 = 0x80;
640 cs->writeisac(cs, ISAC_ADF2, cs->dc.isac.adf2);
641 cs->writeisac(cs, ISAC_SQXR, 0x2f);
642 cs->writeisac(cs, ISAC_SPCR, 0x00);
643 cs->writeisac(cs, ISAC_STCR, 0x70);
644 cs->writeisac(cs, ISAC_MODE, 0xc9);
645 cs->writeisac(cs, ISAC_TIMR, 0x00);
646 cs->writeisac(cs, ISAC_ADF1, 0x00);
647 }
648 ph_command(cs, ISAC_CMD_RS);
649 cs->writeisac(cs, ISAC_MASK, 0x0);
650 }
651
652 void __devinit
653 clear_pending_isac_ints(struct IsdnCardState *cs)
654 {
655 int val, eval;
656
657 val = cs->readisac(cs, ISAC_STAR);
658 debugl1(cs, "ISAC STAR %x", val);
659 val = cs->readisac(cs, ISAC_MODE);
660 debugl1(cs, "ISAC MODE %x", val);
661 val = cs->readisac(cs, ISAC_ADF2);
662 debugl1(cs, "ISAC ADF2 %x", val);
663 val = cs->readisac(cs, ISAC_ISTA);
664 debugl1(cs, "ISAC ISTA %x", val);
665 if (val & 0x01) {
666 eval = cs->readisac(cs, ISAC_EXIR);
667 debugl1(cs, "ISAC EXIR %x", eval);
668 }
669 val = cs->readisac(cs, ISAC_CIR0);
670 debugl1(cs, "ISAC CIR0 %x", val);
671 cs->dc.isac.ph_state = (val >> 2) & 0xf;
672 schedule_event(cs, D_L1STATECHANGE);
673 /* Disable all IRQ */
674 cs->writeisac(cs, ISAC_MASK, 0xFF);
675 }
676
677 void __devinit
678 setup_isac(struct IsdnCardState *cs)
679 {
680 INIT_WORK(&cs->tqueue, (void *)(void *) isac_bh, cs);
681 cs->dbusytimer.function = (void *) dbusy_timer_handler;
682 cs->dbusytimer.data = (long) cs;
683 init_timer(&cs->dbusytimer);
684 }
Linux with added FPC-III support