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[PATCH] g_file_storage: fix obscure race condition
[linux/fpc-iii.git] / drivers / isdn / hisax / icc.c
blobb4ca5859b1777cb1e99f88f7fb95714644a845ee
1 /* $Id: icc.c,v 1.8.2.3 2004/01/13 14:31:25 keil Exp $
2 *
3 * ICC specific routines
4 *
5 * Author Matt Henderson & Guy Ellis
6 * Copyright by Traverse Technologies Pty Ltd, www.travers.com.au
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 * 1999.6.25 Initial implementation of routines for Siemens ISDN
12 * Communication Controller PEB 2070 based on the ISAC routines
13 * written by Karsten Keil.
14 *
15 */
16
17 #include <linux/init.h>
18 #include "hisax.h"
19 #include "icc.h"
20 // #include "arcofi.h"
21 #include "isdnl1.h"
22 #include <linux/interrupt.h>
23
24 #define DBUSY_TIMER_VALUE 80
25 #define ARCOFI_USE 0
26
27 static char *ICCVer[] __initdata =
28 {"2070 A1/A3", "2070 B1", "2070 B2/B3", "2070 V2.4"};
29
30 void __init
31 ICCVersion(struct IsdnCardState *cs, char *s)
32 {
33 int val;
34
35 val = cs->readisac(cs, ICC_RBCH);
36 printk(KERN_INFO "%s ICC version (%x): %s\n", s, val, ICCVer[(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, ICC_CIX0, (command << 2) | 3);
45 }
46
47
48 static void
49 icc_new_ph(struct IsdnCardState *cs)
50 {
51 switch (cs->dc.icc.ph_state) {
52 case (ICC_IND_EI1):
53 ph_command(cs, ICC_CMD_DI);
54 l1_msg(cs, HW_RESET | INDICATION, NULL);
55 break;
56 case (ICC_IND_DC):
57 l1_msg(cs, HW_DEACTIVATE | CONFIRM, NULL);
58 break;
59 case (ICC_IND_DR):
60 l1_msg(cs, HW_DEACTIVATE | INDICATION, NULL);
61 break;
62 case (ICC_IND_PU):
63 l1_msg(cs, HW_POWERUP | CONFIRM, NULL);
64 break;
65 case (ICC_IND_FJ):
66 l1_msg(cs, HW_RSYNC | INDICATION, NULL);
67 break;
68 case (ICC_IND_AR):
69 l1_msg(cs, HW_INFO2 | INDICATION, NULL);
70 break;
71 case (ICC_IND_AI):
72 l1_msg(cs, HW_INFO4 | INDICATION, NULL);
73 break;
74 default:
75 break;
76 }
77 }
78
79 static void
80 icc_bh(struct IsdnCardState *cs)
81 {
82 struct PStack *stptr;
83
84 if (!cs)
85 return;
86 if (test_and_clear_bit(D_CLEARBUSY, &cs->event)) {
87 if (cs->debug)
88 debugl1(cs, "D-Channel Busy cleared");
89 stptr = cs->stlist;
90 while (stptr != NULL) {
91 stptr->l1.l1l2(stptr, PH_PAUSE | CONFIRM, NULL);
92 stptr = stptr->next;
93 }
94 }
95 if (test_and_clear_bit(D_L1STATECHANGE, &cs->event))
96 icc_new_ph(cs);
97 if (test_and_clear_bit(D_RCVBUFREADY, &cs->event))
98 DChannel_proc_rcv(cs);
99 if (test_and_clear_bit(D_XMTBUFREADY, &cs->event))
100 DChannel_proc_xmt(cs);
101 #if ARCOFI_USE
102 if (!test_bit(HW_ARCOFI, &cs->HW_Flags))
103 return;
104 if (test_and_clear_bit(D_RX_MON1, &cs->event))
105 arcofi_fsm(cs, ARCOFI_RX_END, NULL);
106 if (test_and_clear_bit(D_TX_MON1, &cs->event))
107 arcofi_fsm(cs, ARCOFI_TX_END, NULL);
108 #endif
109 }
110
111 static void
112 icc_empty_fifo(struct IsdnCardState *cs, int count)
113 {
114 u_char *ptr;
115
116 if ((cs->debug & L1_DEB_ISAC) && !(cs->debug & L1_DEB_ISAC_FIFO))
117 debugl1(cs, "icc_empty_fifo");
118
119 if ((cs->rcvidx + count) >= MAX_DFRAME_LEN_L1) {
120 if (cs->debug & L1_DEB_WARN)
121 debugl1(cs, "icc_empty_fifo overrun %d",
122 cs->rcvidx + count);
123 cs->writeisac(cs, ICC_CMDR, 0x80);
124 cs->rcvidx = 0;
125 return;
126 }
127 ptr = cs->rcvbuf + cs->rcvidx;
128 cs->rcvidx += count;
129 cs->readisacfifo(cs, ptr, count);
130 cs->writeisac(cs, ICC_CMDR, 0x80);
131 if (cs->debug & L1_DEB_ISAC_FIFO) {
132 char *t = cs->dlog;
133
134 t += sprintf(t, "icc_empty_fifo cnt %d", count);
135 QuickHex(t, ptr, count);
136 debugl1(cs, cs->dlog);
137 }
138 }
139
140 static void
141 icc_fill_fifo(struct IsdnCardState *cs)
142 {
143 int count, more;
144 u_char *ptr;
145
146 if ((cs->debug & L1_DEB_ISAC) && !(cs->debug & L1_DEB_ISAC_FIFO))
147 debugl1(cs, "icc_fill_fifo");
148
149 if (!cs->tx_skb)
150 return;
151
152 count = cs->tx_skb->len;
153 if (count <= 0)
154 return;
155
156 more = 0;
157 if (count > 32) {
158 more = !0;
159 count = 32;
160 }
161 ptr = cs->tx_skb->data;
162 skb_pull(cs->tx_skb, count);
163 cs->tx_cnt += count;
164 cs->writeisacfifo(cs, ptr, count);
165 cs->writeisac(cs, ICC_CMDR, more ? 0x8 : 0xa);
166 if (test_and_set_bit(FLG_DBUSY_TIMER, &cs->HW_Flags)) {
167 debugl1(cs, "icc_fill_fifo dbusytimer running");
168 del_timer(&cs->dbusytimer);
169 }
170 init_timer(&cs->dbusytimer);
171 cs->dbusytimer.expires = jiffies + ((DBUSY_TIMER_VALUE * HZ)/1000);
172 add_timer(&cs->dbusytimer);
173 if (cs->debug & L1_DEB_ISAC_FIFO) {
174 char *t = cs->dlog;
175
176 t += sprintf(t, "icc_fill_fifo cnt %d", count);
177 QuickHex(t, ptr, count);
178 debugl1(cs, cs->dlog);
179 }
180 }
181
182 void
183 icc_interrupt(struct IsdnCardState *cs, u_char val)
184 {
185 u_char exval, v1;
186 struct sk_buff *skb;
187 unsigned int count;
188
189 if (cs->debug & L1_DEB_ISAC)
190 debugl1(cs, "ICC interrupt %x", val);
191 if (val & 0x80) { /* RME */
192 exval = cs->readisac(cs, ICC_RSTA);
193 if ((exval & 0x70) != 0x20) {
194 if (exval & 0x40) {
195 if (cs->debug & L1_DEB_WARN)
196 debugl1(cs, "ICC RDO");
197 #ifdef ERROR_STATISTIC
198 cs->err_rx++;
199 #endif
200 }
201 if (!(exval & 0x20)) {
202 if (cs->debug & L1_DEB_WARN)
203 debugl1(cs, "ICC CRC error");
204 #ifdef ERROR_STATISTIC
205 cs->err_crc++;
206 #endif
207 }
208 cs->writeisac(cs, ICC_CMDR, 0x80);
209 } else {
210 count = cs->readisac(cs, ICC_RBCL) & 0x1f;
211 if (count == 0)
212 count = 32;
213 icc_empty_fifo(cs, count);
214 if ((count = cs->rcvidx) > 0) {
215 cs->rcvidx = 0;
216 if (!(skb = alloc_skb(count, GFP_ATOMIC)))
217 printk(KERN_WARNING "HiSax: D receive out of memory\n");
218 else {
219 memcpy(skb_put(skb, count), cs->rcvbuf, count);
220 skb_queue_tail(&cs->rq, skb);
221 }
222 }
223 }
224 cs->rcvidx = 0;
225 schedule_event(cs, D_RCVBUFREADY);
226 }
227 if (val & 0x40) { /* RPF */
228 icc_empty_fifo(cs, 32);
229 }
230 if (val & 0x20) { /* RSC */
231 /* never */
232 if (cs->debug & L1_DEB_WARN)
233 debugl1(cs, "ICC RSC interrupt");
234 }
235 if (val & 0x10) { /* XPR */
236 if (test_and_clear_bit(FLG_DBUSY_TIMER, &cs->HW_Flags))
237 del_timer(&cs->dbusytimer);
238 if (test_and_clear_bit(FLG_L1_DBUSY, &cs->HW_Flags))
239 schedule_event(cs, D_CLEARBUSY);
240 if (cs->tx_skb) {
241 if (cs->tx_skb->len) {
242 icc_fill_fifo(cs);
243 goto afterXPR;
244 } else {
245 dev_kfree_skb_irq(cs->tx_skb);
246 cs->tx_cnt = 0;
247 cs->tx_skb = NULL;
248 }
249 }
250 if ((cs->tx_skb = skb_dequeue(&cs->sq))) {
251 cs->tx_cnt = 0;
252 icc_fill_fifo(cs);
253 } else
254 schedule_event(cs, D_XMTBUFREADY);
255 }
256 afterXPR:
257 if (val & 0x04) { /* CISQ */
258 exval = cs->readisac(cs, ICC_CIR0);
259 if (cs->debug & L1_DEB_ISAC)
260 debugl1(cs, "ICC CIR0 %02X", exval );
261 if (exval & 2) {
262 cs->dc.icc.ph_state = (exval >> 2) & 0xf;
263 if (cs->debug & L1_DEB_ISAC)
264 debugl1(cs, "ph_state change %x", cs->dc.icc.ph_state);
265 schedule_event(cs, D_L1STATECHANGE);
266 }
267 if (exval & 1) {
268 exval = cs->readisac(cs, ICC_CIR1);
269 if (cs->debug & L1_DEB_ISAC)
270 debugl1(cs, "ICC CIR1 %02X", exval );
271 }
272 }
273 if (val & 0x02) { /* SIN */
274 /* never */
275 if (cs->debug & L1_DEB_WARN)
276 debugl1(cs, "ICC SIN interrupt");
277 }
278 if (val & 0x01) { /* EXI */
279 exval = cs->readisac(cs, ICC_EXIR);
280 if (cs->debug & L1_DEB_WARN)
281 debugl1(cs, "ICC EXIR %02x", exval);
282 if (exval & 0x80) { /* XMR */
283 debugl1(cs, "ICC XMR");
284 printk(KERN_WARNING "HiSax: ICC XMR\n");
285 }
286 if (exval & 0x40) { /* XDU */
287 debugl1(cs, "ICC XDU");
288 printk(KERN_WARNING "HiSax: ICC XDU\n");
289 #ifdef ERROR_STATISTIC
290 cs->err_tx++;
291 #endif
292 if (test_and_clear_bit(FLG_DBUSY_TIMER, &cs->HW_Flags))
293 del_timer(&cs->dbusytimer);
294 if (test_and_clear_bit(FLG_L1_DBUSY, &cs->HW_Flags))
295 schedule_event(cs, D_CLEARBUSY);
296 if (cs->tx_skb) { /* Restart frame */
297 skb_push(cs->tx_skb, cs->tx_cnt);
298 cs->tx_cnt = 0;
299 icc_fill_fifo(cs);
300 } else {
301 printk(KERN_WARNING "HiSax: ICC XDU no skb\n");
302 debugl1(cs, "ICC XDU no skb");
303 }
304 }
305 if (exval & 0x04) { /* MOS */
306 v1 = cs->readisac(cs, ICC_MOSR);
307 if (cs->debug & L1_DEB_MONITOR)
308 debugl1(cs, "ICC MOSR %02x", v1);
309 #if ARCOFI_USE
310 if (v1 & 0x08) {
311 if (!cs->dc.icc.mon_rx) {
312 if (!(cs->dc.icc.mon_rx = kmalloc(MAX_MON_FRAME, GFP_ATOMIC))) {
313 if (cs->debug & L1_DEB_WARN)
314 debugl1(cs, "ICC MON RX out of memory!");
315 cs->dc.icc.mocr &= 0xf0;
316 cs->dc.icc.mocr |= 0x0a;
317 cs->writeisac(cs, ICC_MOCR, cs->dc.icc.mocr);
318 goto afterMONR0;
319 } else
320 cs->dc.icc.mon_rxp = 0;
321 }
322 if (cs->dc.icc.mon_rxp >= MAX_MON_FRAME) {
323 cs->dc.icc.mocr &= 0xf0;
324 cs->dc.icc.mocr |= 0x0a;
325 cs->writeisac(cs, ICC_MOCR, cs->dc.icc.mocr);
326 cs->dc.icc.mon_rxp = 0;
327 if (cs->debug & L1_DEB_WARN)
328 debugl1(cs, "ICC MON RX overflow!");
329 goto afterMONR0;
330 }
331 cs->dc.icc.mon_rx[cs->dc.icc.mon_rxp++] = cs->readisac(cs, ICC_MOR0);
332 if (cs->debug & L1_DEB_MONITOR)
333 debugl1(cs, "ICC MOR0 %02x", cs->dc.icc.mon_rx[cs->dc.icc.mon_rxp -1]);
334 if (cs->dc.icc.mon_rxp == 1) {
335 cs->dc.icc.mocr |= 0x04;
336 cs->writeisac(cs, ICC_MOCR, cs->dc.icc.mocr);
337 }
338 }
339 afterMONR0:
340 if (v1 & 0x80) {
341 if (!cs->dc.icc.mon_rx) {
342 if (!(cs->dc.icc.mon_rx = kmalloc(MAX_MON_FRAME, GFP_ATOMIC))) {
343 if (cs->debug & L1_DEB_WARN)
344 debugl1(cs, "ICC MON RX out of memory!");
345 cs->dc.icc.mocr &= 0x0f;
346 cs->dc.icc.mocr |= 0xa0;
347 cs->writeisac(cs, ICC_MOCR, cs->dc.icc.mocr);
348 goto afterMONR1;
349 } else
350 cs->dc.icc.mon_rxp = 0;
351 }
352 if (cs->dc.icc.mon_rxp >= MAX_MON_FRAME) {
353 cs->dc.icc.mocr &= 0x0f;
354 cs->dc.icc.mocr |= 0xa0;
355 cs->writeisac(cs, ICC_MOCR, cs->dc.icc.mocr);
356 cs->dc.icc.mon_rxp = 0;
357 if (cs->debug & L1_DEB_WARN)
358 debugl1(cs, "ICC MON RX overflow!");
359 goto afterMONR1;
360 }
361 cs->dc.icc.mon_rx[cs->dc.icc.mon_rxp++] = cs->readisac(cs, ICC_MOR1);
362 if (cs->debug & L1_DEB_MONITOR)
363 debugl1(cs, "ICC MOR1 %02x", cs->dc.icc.mon_rx[cs->dc.icc.mon_rxp -1]);
364 cs->dc.icc.mocr |= 0x40;
365 cs->writeisac(cs, ICC_MOCR, cs->dc.icc.mocr);
366 }
367 afterMONR1:
368 if (v1 & 0x04) {
369 cs->dc.icc.mocr &= 0xf0;
370 cs->writeisac(cs, ICC_MOCR, cs->dc.icc.mocr);
371 cs->dc.icc.mocr |= 0x0a;
372 cs->writeisac(cs, ICC_MOCR, cs->dc.icc.mocr);
373 schedule_event(cs, D_RX_MON0);
374 }
375 if (v1 & 0x40) {
376 cs->dc.icc.mocr &= 0x0f;
377 cs->writeisac(cs, ICC_MOCR, cs->dc.icc.mocr);
378 cs->dc.icc.mocr |= 0xa0;
379 cs->writeisac(cs, ICC_MOCR, cs->dc.icc.mocr);
380 schedule_event(cs, D_RX_MON1);
381 }
382 if (v1 & 0x02) {
383 if ((!cs->dc.icc.mon_tx) || (cs->dc.icc.mon_txc &&
384 (cs->dc.icc.mon_txp >= cs->dc.icc.mon_txc) &&
385 !(v1 & 0x08))) {
386 cs->dc.icc.mocr &= 0xf0;
387 cs->writeisac(cs, ICC_MOCR, cs->dc.icc.mocr);
388 cs->dc.icc.mocr |= 0x0a;
389 cs->writeisac(cs, ICC_MOCR, cs->dc.icc.mocr);
390 if (cs->dc.icc.mon_txc &&
391 (cs->dc.icc.mon_txp >= cs->dc.icc.mon_txc))
392 schedule_event(cs, D_TX_MON0);
393 goto AfterMOX0;
394 }
395 if (cs->dc.icc.mon_txc && (cs->dc.icc.mon_txp >= cs->dc.icc.mon_txc)) {
396 schedule_event(cs, D_TX_MON0);
397 goto AfterMOX0;
398 }
399 cs->writeisac(cs, ICC_MOX0,
400 cs->dc.icc.mon_tx[cs->dc.icc.mon_txp++]);
401 if (cs->debug & L1_DEB_MONITOR)
402 debugl1(cs, "ICC %02x -> MOX0", cs->dc.icc.mon_tx[cs->dc.icc.mon_txp -1]);
403 }
404 AfterMOX0:
405 if (v1 & 0x20) {
406 if ((!cs->dc.icc.mon_tx) || (cs->dc.icc.mon_txc &&
407 (cs->dc.icc.mon_txp >= cs->dc.icc.mon_txc) &&
408 !(v1 & 0x80))) {
409 cs->dc.icc.mocr &= 0x0f;
410 cs->writeisac(cs, ICC_MOCR, cs->dc.icc.mocr);
411 cs->dc.icc.mocr |= 0xa0;
412 cs->writeisac(cs, ICC_MOCR, cs->dc.icc.mocr);
413 if (cs->dc.icc.mon_txc &&
414 (cs->dc.icc.mon_txp >= cs->dc.icc.mon_txc))
415 schedule_event(cs, D_TX_MON1);
416 goto AfterMOX1;
417 }
418 if (cs->dc.icc.mon_txc && (cs->dc.icc.mon_txp >= cs->dc.icc.mon_txc)) {
419 schedule_event(cs, D_TX_MON1);
420 goto AfterMOX1;
421 }
422 cs->writeisac(cs, ICC_MOX1,
423 cs->dc.icc.mon_tx[cs->dc.icc.mon_txp++]);
424 if (cs->debug & L1_DEB_MONITOR)
425 debugl1(cs, "ICC %02x -> MOX1", cs->dc.icc.mon_tx[cs->dc.icc.mon_txp -1]);
426 }
427 AfterMOX1:
428 #endif
429 }
430 }
431 }
432
433 static void
434 ICC_l1hw(struct PStack *st, int pr, void *arg)
435 {
436 struct IsdnCardState *cs = (struct IsdnCardState *) st->l1.hardware;
437 struct sk_buff *skb = arg;
438 u_long flags;
439 int val;
440
441 switch (pr) {
442 case (PH_DATA |REQUEST):
443 if (cs->debug & DEB_DLOG_HEX)
444 LogFrame(cs, skb->data, skb->len);
445 if (cs->debug & DEB_DLOG_VERBOSE)
446 dlogframe(cs, skb, 0);
447 spin_lock_irqsave(&cs->lock, flags);
448 if (cs->tx_skb) {
449 skb_queue_tail(&cs->sq, skb);
450 #ifdef L2FRAME_DEBUG /* psa */
451 if (cs->debug & L1_DEB_LAPD)
452 Logl2Frame(cs, skb, "PH_DATA Queued", 0);
453 #endif
454 } else {
455 cs->tx_skb = skb;
456 cs->tx_cnt = 0;
457 #ifdef L2FRAME_DEBUG /* psa */
458 if (cs->debug & L1_DEB_LAPD)
459 Logl2Frame(cs, skb, "PH_DATA", 0);
460 #endif
461 icc_fill_fifo(cs);
462 }
463 spin_unlock_irqrestore(&cs->lock, flags);
464 break;
465 case (PH_PULL |INDICATION):
466 spin_lock_irqsave(&cs->lock, flags);
467 if (cs->tx_skb) {
468 if (cs->debug & L1_DEB_WARN)
469 debugl1(cs, " l2l1 tx_skb exist this shouldn't happen");
470 skb_queue_tail(&cs->sq, skb);
471 break;
472 }
473 if (cs->debug & DEB_DLOG_HEX)
474 LogFrame(cs, skb->data, skb->len);
475 if (cs->debug & DEB_DLOG_VERBOSE)
476 dlogframe(cs, skb, 0);
477 cs->tx_skb = skb;
478 cs->tx_cnt = 0;
479 #ifdef L2FRAME_DEBUG /* psa */
480 if (cs->debug & L1_DEB_LAPD)
481 Logl2Frame(cs, skb, "PH_DATA_PULLED", 0);
482 #endif
483 icc_fill_fifo(cs);
484 spin_unlock_irqrestore(&cs->lock, flags);
485 break;
486 case (PH_PULL | REQUEST):
487 #ifdef L2FRAME_DEBUG /* psa */
488 if (cs->debug & L1_DEB_LAPD)
489 debugl1(cs, "-> PH_REQUEST_PULL");
490 #endif
491 if (!cs->tx_skb) {
492 test_and_clear_bit(FLG_L1_PULL_REQ, &st->l1.Flags);
493 st->l1.l1l2(st, PH_PULL | CONFIRM, NULL);
494 } else
495 test_and_set_bit(FLG_L1_PULL_REQ, &st->l1.Flags);
496 break;
497 case (HW_RESET | REQUEST):
498 spin_lock_irqsave(&cs->lock, flags);
499 if ((cs->dc.icc.ph_state == ICC_IND_EI1) ||
500 (cs->dc.icc.ph_state == ICC_IND_DR))
501 ph_command(cs, ICC_CMD_DI);
502 else
503 ph_command(cs, ICC_CMD_RES);
504 spin_unlock_irqrestore(&cs->lock, flags);
505 break;
506 case (HW_ENABLE | REQUEST):
507 spin_lock_irqsave(&cs->lock, flags);
508 ph_command(cs, ICC_CMD_DI);
509 spin_unlock_irqrestore(&cs->lock, flags);
510 break;
511 case (HW_INFO1 | REQUEST):
512 spin_lock_irqsave(&cs->lock, flags);
513 ph_command(cs, ICC_CMD_AR);
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, ICC_CMD_AI);
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, ICC_SPCR, 0xa);
532 cs->writeisac(cs, ICC_ADF1, 0x2);
533 } else {
534 cs->writeisac(cs, ICC_SPCR, val);
535 cs->writeisac(cs, ICC_ADF1, 0xa);
536 }
537 } else {
538 /* IOM 2 Mode */
539 cs->writeisac(cs, ICC_SPCR, val);
540 if (val)
541 cs->writeisac(cs, ICC_ADF1, 0x8);
542 else
543 cs->writeisac(cs, ICC_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, "icc_l1hw unknown %04x", pr);
562 break;
563 }
564 }
565
566 static void
567 setstack_icc(struct PStack *st, struct IsdnCardState *cs)
568 {
569 st->l1.l1hw = ICC_l1hw;
570 }
571
572 static void
573 DC_Close_icc(struct IsdnCardState *cs) {
574 if (cs->dc.icc.mon_rx) {
575 kfree(cs->dc.icc.mon_rx);
576 cs->dc.icc.mon_rx = NULL;
577 }
578 if (cs->dc.icc.mon_tx) {
579 kfree(cs->dc.icc.mon_tx);
580 cs->dc.icc.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, ICC_RBCH);
592 star = cs->readisac(cs, ICC_STAR);
593 if (cs->debug)
594 debugl1(cs, "D-Channel Busy RBCH %02x STAR %02x",
595 rbch, star);
596 if (rbch & ICC_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: ICC D-Channel Busy no skb\n");
612 debugl1(cs, "D-Channel Busy no skb");
613 }
614 cs->writeisac(cs, ICC_CMDR, 0x01); /* Transmitter reset */
615 cs->irq_func(cs->irq, cs, NULL);
616 }
617 }
618 }
619
620 void __init
621 initicc(struct IsdnCardState *cs)
622 {
623 cs->setstack_d = setstack_icc;
624 cs->DC_Close = DC_Close_icc;
625 cs->dc.icc.mon_tx = NULL;
626 cs->dc.icc.mon_rx = NULL;
627 cs->writeisac(cs, ICC_MASK, 0xff);
628 cs->dc.icc.mocr = 0xaa;
629 if (test_bit(HW_IOM1, &cs->HW_Flags)) {
630 /* IOM 1 Mode */
631 cs->writeisac(cs, ICC_ADF2, 0x0);
632 cs->writeisac(cs, ICC_SPCR, 0xa);
633 cs->writeisac(cs, ICC_ADF1, 0x2);
634 cs->writeisac(cs, ICC_STCR, 0x70);
635 cs->writeisac(cs, ICC_MODE, 0xc9);
636 } else {
637 /* IOM 2 Mode */
638 if (!cs->dc.icc.adf2)
639 cs->dc.icc.adf2 = 0x80;
640 cs->writeisac(cs, ICC_ADF2, cs->dc.icc.adf2);
641 cs->writeisac(cs, ICC_SQXR, 0xa0);
642 cs->writeisac(cs, ICC_SPCR, 0x20);
643 cs->writeisac(cs, ICC_STCR, 0x70);
644 cs->writeisac(cs, ICC_MODE, 0xca);
645 cs->writeisac(cs, ICC_TIMR, 0x00);
646 cs->writeisac(cs, ICC_ADF1, 0x20);
647 }
648 ph_command(cs, ICC_CMD_RES);
649 cs->writeisac(cs, ICC_MASK, 0x0);
650 ph_command(cs, ICC_CMD_DI);
651 }
652
653 void __init
654 clear_pending_icc_ints(struct IsdnCardState *cs)
655 {
656 int val, eval;
657
658 val = cs->readisac(cs, ICC_STAR);
659 debugl1(cs, "ICC STAR %x", val);
660 val = cs->readisac(cs, ICC_MODE);
661 debugl1(cs, "ICC MODE %x", val);
662 val = cs->readisac(cs, ICC_ADF2);
663 debugl1(cs, "ICC ADF2 %x", val);
664 val = cs->readisac(cs, ICC_ISTA);
665 debugl1(cs, "ICC ISTA %x", val);
666 if (val & 0x01) {
667 eval = cs->readisac(cs, ICC_EXIR);
668 debugl1(cs, "ICC EXIR %x", eval);
669 }
670 val = cs->readisac(cs, ICC_CIR0);
671 debugl1(cs, "ICC CIR0 %x", val);
672 cs->dc.icc.ph_state = (val >> 2) & 0xf;
673 schedule_event(cs, D_L1STATECHANGE);
674 /* Disable all IRQ */
675 cs->writeisac(cs, ICC_MASK, 0xFF);
676 }
677
678 void __devinit
679 setup_icc(struct IsdnCardState *cs)
680 {
681 INIT_WORK(&cs->tqueue, (void *)(void *) icc_bh, cs);
682 cs->dbusytimer.function = (void *) dbusy_timer_handler;
683 cs->dbusytimer.data = (long) cs;
684 init_timer(&cs->dbusytimer);
685 }
Linux with added FPC-III support