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[] =
28 {"2070 A1/A3", "2070 B1", "2070 B2/B3", "2070 V2.4"};
29
30 void
ICCVersion(struct IsdnCardState * cs,char * s)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
ph_command(struct IsdnCardState * cs,unsigned int command)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
icc_new_ph(struct IsdnCardState * cs)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
icc_bh(struct work_struct * work)80 icc_bh(struct work_struct *work)
81 {
82 struct IsdnCardState *cs =
83 container_of(work, struct IsdnCardState, tqueue);
84 struct PStack *stptr;
85
86 if (!cs)
87 return;
88 if (test_and_clear_bit(D_CLEARBUSY, &cs->event)) {
89 if (cs->debug)
90 debugl1(cs, "D-Channel Busy cleared");
91 stptr = cs->stlist;
92 while (stptr != NULL) {
93 stptr->l1.l1l2(stptr, PH_PAUSE | CONFIRM, NULL);
94 stptr = stptr->next;
95 }
96 }
97 if (test_and_clear_bit(D_L1STATECHANGE, &cs->event))
98 icc_new_ph(cs);
99 if (test_and_clear_bit(D_RCVBUFREADY, &cs->event))
100 DChannel_proc_rcv(cs);
101 if (test_and_clear_bit(D_XMTBUFREADY, &cs->event))
102 DChannel_proc_xmt(cs);
103 #if ARCOFI_USE
104 if (!test_bit(HW_ARCOFI, &cs->HW_Flags))
105 return;
106 if (test_and_clear_bit(D_RX_MON1, &cs->event))
107 arcofi_fsm(cs, ARCOFI_RX_END, NULL);
108 if (test_and_clear_bit(D_TX_MON1, &cs->event))
109 arcofi_fsm(cs, ARCOFI_TX_END, NULL);
110 #endif
111 }
112
113 static void
icc_empty_fifo(struct IsdnCardState * cs,int count)114 icc_empty_fifo(struct IsdnCardState *cs, int count)
115 {
116 u_char *ptr;
117
118 if ((cs->debug & L1_DEB_ISAC) && !(cs->debug & L1_DEB_ISAC_FIFO))
119 debugl1(cs, "icc_empty_fifo");
120
121 if ((cs->rcvidx + count) >= MAX_DFRAME_LEN_L1) {
122 if (cs->debug & L1_DEB_WARN)
123 debugl1(cs, "icc_empty_fifo overrun %d",
124 cs->rcvidx + count);
125 cs->writeisac(cs, ICC_CMDR, 0x80);
126 cs->rcvidx = 0;
127 return;
128 }
129 ptr = cs->rcvbuf + cs->rcvidx;
130 cs->rcvidx += count;
131 cs->readisacfifo(cs, ptr, count);
132 cs->writeisac(cs, ICC_CMDR, 0x80);
133 if (cs->debug & L1_DEB_ISAC_FIFO) {
134 char *t = cs->dlog;
135
136 t += sprintf(t, "icc_empty_fifo cnt %d", count);
137 QuickHex(t, ptr, count);
138 debugl1(cs, cs->dlog);
139 }
140 }
141
142 static void
icc_fill_fifo(struct IsdnCardState * cs)143 icc_fill_fifo(struct IsdnCardState *cs)
144 {
145 int count, more;
146 u_char *ptr;
147
148 if ((cs->debug & L1_DEB_ISAC) && !(cs->debug & L1_DEB_ISAC_FIFO))
149 debugl1(cs, "icc_fill_fifo");
150
151 if (!cs->tx_skb)
152 return;
153
154 count = cs->tx_skb->len;
155 if (count <= 0)
156 return;
157
158 more = 0;
159 if (count > 32) {
160 more = !0;
161 count = 32;
162 }
163 ptr = cs->tx_skb->data;
164 skb_pull(cs->tx_skb, count);
165 cs->tx_cnt += count;
166 cs->writeisacfifo(cs, ptr, count);
167 cs->writeisac(cs, ICC_CMDR, more ? 0x8 : 0xa);
168 if (test_and_set_bit(FLG_DBUSY_TIMER, &cs->HW_Flags)) {
169 debugl1(cs, "icc_fill_fifo dbusytimer running");
170 del_timer(&cs->dbusytimer);
171 }
172 init_timer(&cs->dbusytimer);
173 cs->dbusytimer.expires = jiffies + ((DBUSY_TIMER_VALUE * HZ)/1000);
174 add_timer(&cs->dbusytimer);
175 if (cs->debug & L1_DEB_ISAC_FIFO) {
176 char *t = cs->dlog;
177
178 t += sprintf(t, "icc_fill_fifo cnt %d", count);
179 QuickHex(t, ptr, count);
180 debugl1(cs, cs->dlog);
181 }
182 }
183
184 void
icc_interrupt(struct IsdnCardState * cs,u_char val)185 icc_interrupt(struct IsdnCardState *cs, u_char val)
186 {
187 u_char exval, v1;
188 struct sk_buff *skb;
189 unsigned int count;
190
191 if (cs->debug & L1_DEB_ISAC)
192 debugl1(cs, "ICC interrupt %x", val);
193 if (val & 0x80) { /* RME */
194 exval = cs->readisac(cs, ICC_RSTA);
195 if ((exval & 0x70) != 0x20) {
196 if (exval & 0x40) {
197 if (cs->debug & L1_DEB_WARN)
198 debugl1(cs, "ICC RDO");
199 #ifdef ERROR_STATISTIC
200 cs->err_rx++;
201 #endif
202 }
203 if (!(exval & 0x20)) {
204 if (cs->debug & L1_DEB_WARN)
205 debugl1(cs, "ICC CRC error");
206 #ifdef ERROR_STATISTIC
207 cs->err_crc++;
208 #endif
209 }
210 cs->writeisac(cs, ICC_CMDR, 0x80);
211 } else {
212 count = cs->readisac(cs, ICC_RBCL) & 0x1f;
213 if (count == 0)
214 count = 32;
215 icc_empty_fifo(cs, count);
216 if ((count = cs->rcvidx) > 0) {
217 cs->rcvidx = 0;
218 if (!(skb = alloc_skb(count, GFP_ATOMIC)))
219 printk(KERN_WARNING "HiSax: D receive out of memory\n");
220 else {
221 memcpy(skb_put(skb, count), cs->rcvbuf, count);
222 skb_queue_tail(&cs->rq, skb);
223 }
224 }
225 }
226 cs->rcvidx = 0;
227 schedule_event(cs, D_RCVBUFREADY);
228 }
229 if (val & 0x40) { /* RPF */
230 icc_empty_fifo(cs, 32);
231 }
232 if (val & 0x20) { /* RSC */
233 /* never */
234 if (cs->debug & L1_DEB_WARN)
235 debugl1(cs, "ICC RSC interrupt");
236 }
237 if (val & 0x10) { /* XPR */
238 if (test_and_clear_bit(FLG_DBUSY_TIMER, &cs->HW_Flags))
239 del_timer(&cs->dbusytimer);
240 if (test_and_clear_bit(FLG_L1_DBUSY, &cs->HW_Flags))
241 schedule_event(cs, D_CLEARBUSY);
242 if (cs->tx_skb) {
243 if (cs->tx_skb->len) {
244 icc_fill_fifo(cs);
245 goto afterXPR;
246 } else {
247 dev_kfree_skb_irq(cs->tx_skb);
248 cs->tx_cnt = 0;
249 cs->tx_skb = NULL;
250 }
251 }
252 if ((cs->tx_skb = skb_dequeue(&cs->sq))) {
253 cs->tx_cnt = 0;
254 icc_fill_fifo(cs);
255 } else
256 schedule_event(cs, D_XMTBUFREADY);
257 }
258 afterXPR:
259 if (val & 0x04) { /* CISQ */
260 exval = cs->readisac(cs, ICC_CIR0);
261 if (cs->debug & L1_DEB_ISAC)
262 debugl1(cs, "ICC CIR0 %02X", exval );
263 if (exval & 2) {
264 cs->dc.icc.ph_state = (exval >> 2) & 0xf;
265 if (cs->debug & L1_DEB_ISAC)
266 debugl1(cs, "ph_state change %x", cs->dc.icc.ph_state);
267 schedule_event(cs, D_L1STATECHANGE);
268 }
269 if (exval & 1) {
270 exval = cs->readisac(cs, ICC_CIR1);
271 if (cs->debug & L1_DEB_ISAC)
272 debugl1(cs, "ICC CIR1 %02X", exval );
273 }
274 }
275 if (val & 0x02) { /* SIN */
276 /* never */
277 if (cs->debug & L1_DEB_WARN)
278 debugl1(cs, "ICC SIN interrupt");
279 }
280 if (val & 0x01) { /* EXI */
281 exval = cs->readisac(cs, ICC_EXIR);
282 if (cs->debug & L1_DEB_WARN)
283 debugl1(cs, "ICC EXIR %02x", exval);
284 if (exval & 0x80) { /* XMR */
285 debugl1(cs, "ICC XMR");
286 printk(KERN_WARNING "HiSax: ICC XMR\n");
287 }
288 if (exval & 0x40) { /* XDU */
289 debugl1(cs, "ICC XDU");
290 printk(KERN_WARNING "HiSax: ICC XDU\n");
291 #ifdef ERROR_STATISTIC
292 cs->err_tx++;
293 #endif
294 if (test_and_clear_bit(FLG_DBUSY_TIMER, &cs->HW_Flags))
295 del_timer(&cs->dbusytimer);
296 if (test_and_clear_bit(FLG_L1_DBUSY, &cs->HW_Flags))
297 schedule_event(cs, D_CLEARBUSY);
298 if (cs->tx_skb) { /* Restart frame */
299 skb_push(cs->tx_skb, cs->tx_cnt);
300 cs->tx_cnt = 0;
301 icc_fill_fifo(cs);
302 } else {
303 printk(KERN_WARNING "HiSax: ICC XDU no skb\n");
304 debugl1(cs, "ICC XDU no skb");
305 }
306 }
307 if (exval & 0x04) { /* MOS */
308 v1 = cs->readisac(cs, ICC_MOSR);
309 if (cs->debug & L1_DEB_MONITOR)
310 debugl1(cs, "ICC MOSR %02x", v1);
311 #if ARCOFI_USE
312 if (v1 & 0x08) {
313 if (!cs->dc.icc.mon_rx) {
314 if (!(cs->dc.icc.mon_rx = kmalloc(MAX_MON_FRAME, GFP_ATOMIC))) {
315 if (cs->debug & L1_DEB_WARN)
316 debugl1(cs, "ICC MON RX out of memory!");
317 cs->dc.icc.mocr &= 0xf0;
318 cs->dc.icc.mocr |= 0x0a;
319 cs->writeisac(cs, ICC_MOCR, cs->dc.icc.mocr);
320 goto afterMONR0;
321 } else
322 cs->dc.icc.mon_rxp = 0;
323 }
324 if (cs->dc.icc.mon_rxp >= MAX_MON_FRAME) {
325 cs->dc.icc.mocr &= 0xf0;
326 cs->dc.icc.mocr |= 0x0a;
327 cs->writeisac(cs, ICC_MOCR, cs->dc.icc.mocr);
328 cs->dc.icc.mon_rxp = 0;
329 if (cs->debug & L1_DEB_WARN)
330 debugl1(cs, "ICC MON RX overflow!");
331 goto afterMONR0;
332 }
333 cs->dc.icc.mon_rx[cs->dc.icc.mon_rxp++] = cs->readisac(cs, ICC_MOR0);
334 if (cs->debug & L1_DEB_MONITOR)
335 debugl1(cs, "ICC MOR0 %02x", cs->dc.icc.mon_rx[cs->dc.icc.mon_rxp -1]);
336 if (cs->dc.icc.mon_rxp == 1) {
337 cs->dc.icc.mocr |= 0x04;
338 cs->writeisac(cs, ICC_MOCR, cs->dc.icc.mocr);
339 }
340 }
341 afterMONR0:
342 if (v1 & 0x80) {
343 if (!cs->dc.icc.mon_rx) {
344 if (!(cs->dc.icc.mon_rx = kmalloc(MAX_MON_FRAME, GFP_ATOMIC))) {
345 if (cs->debug & L1_DEB_WARN)
346 debugl1(cs, "ICC MON RX out of memory!");
347 cs->dc.icc.mocr &= 0x0f;
348 cs->dc.icc.mocr |= 0xa0;
349 cs->writeisac(cs, ICC_MOCR, cs->dc.icc.mocr);
350 goto afterMONR1;
351 } else
352 cs->dc.icc.mon_rxp = 0;
353 }
354 if (cs->dc.icc.mon_rxp >= MAX_MON_FRAME) {
355 cs->dc.icc.mocr &= 0x0f;
356 cs->dc.icc.mocr |= 0xa0;
357 cs->writeisac(cs, ICC_MOCR, cs->dc.icc.mocr);
358 cs->dc.icc.mon_rxp = 0;
359 if (cs->debug & L1_DEB_WARN)
360 debugl1(cs, "ICC MON RX overflow!");
361 goto afterMONR1;
362 }
363 cs->dc.icc.mon_rx[cs->dc.icc.mon_rxp++] = cs->readisac(cs, ICC_MOR1);
364 if (cs->debug & L1_DEB_MONITOR)
365 debugl1(cs, "ICC MOR1 %02x", cs->dc.icc.mon_rx[cs->dc.icc.mon_rxp -1]);
366 cs->dc.icc.mocr |= 0x40;
367 cs->writeisac(cs, ICC_MOCR, cs->dc.icc.mocr);
368 }
369 afterMONR1:
370 if (v1 & 0x04) {
371 cs->dc.icc.mocr &= 0xf0;
372 cs->writeisac(cs, ICC_MOCR, cs->dc.icc.mocr);
373 cs->dc.icc.mocr |= 0x0a;
374 cs->writeisac(cs, ICC_MOCR, cs->dc.icc.mocr);
375 schedule_event(cs, D_RX_MON0);
376 }
377 if (v1 & 0x40) {
378 cs->dc.icc.mocr &= 0x0f;
379 cs->writeisac(cs, ICC_MOCR, cs->dc.icc.mocr);
380 cs->dc.icc.mocr |= 0xa0;
381 cs->writeisac(cs, ICC_MOCR, cs->dc.icc.mocr);
382 schedule_event(cs, D_RX_MON1);
383 }
384 if (v1 & 0x02) {
385 if ((!cs->dc.icc.mon_tx) || (cs->dc.icc.mon_txc &&
386 (cs->dc.icc.mon_txp >= cs->dc.icc.mon_txc) &&
387 !(v1 & 0x08))) {
388 cs->dc.icc.mocr &= 0xf0;
389 cs->writeisac(cs, ICC_MOCR, cs->dc.icc.mocr);
390 cs->dc.icc.mocr |= 0x0a;
391 cs->writeisac(cs, ICC_MOCR, cs->dc.icc.mocr);
392 if (cs->dc.icc.mon_txc &&
393 (cs->dc.icc.mon_txp >= cs->dc.icc.mon_txc))
394 schedule_event(cs, D_TX_MON0);
395 goto AfterMOX0;
396 }
397 if (cs->dc.icc.mon_txc && (cs->dc.icc.mon_txp >= cs->dc.icc.mon_txc)) {
398 schedule_event(cs, D_TX_MON0);
399 goto AfterMOX0;
400 }
401 cs->writeisac(cs, ICC_MOX0,
402 cs->dc.icc.mon_tx[cs->dc.icc.mon_txp++]);
403 if (cs->debug & L1_DEB_MONITOR)
404 debugl1(cs, "ICC %02x -> MOX0", cs->dc.icc.mon_tx[cs->dc.icc.mon_txp -1]);
405 }
406 AfterMOX0:
407 if (v1 & 0x20) {
408 if ((!cs->dc.icc.mon_tx) || (cs->dc.icc.mon_txc &&
409 (cs->dc.icc.mon_txp >= cs->dc.icc.mon_txc) &&
410 !(v1 & 0x80))) {
411 cs->dc.icc.mocr &= 0x0f;
412 cs->writeisac(cs, ICC_MOCR, cs->dc.icc.mocr);
413 cs->dc.icc.mocr |= 0xa0;
414 cs->writeisac(cs, ICC_MOCR, cs->dc.icc.mocr);
415 if (cs->dc.icc.mon_txc &&
416 (cs->dc.icc.mon_txp >= cs->dc.icc.mon_txc))
417 schedule_event(cs, D_TX_MON1);
418 goto AfterMOX1;
419 }
420 if (cs->dc.icc.mon_txc && (cs->dc.icc.mon_txp >= cs->dc.icc.mon_txc)) {
421 schedule_event(cs, D_TX_MON1);
422 goto AfterMOX1;
423 }
424 cs->writeisac(cs, ICC_MOX1,
425 cs->dc.icc.mon_tx[cs->dc.icc.mon_txp++]);
426 if (cs->debug & L1_DEB_MONITOR)
427 debugl1(cs, "ICC %02x -> MOX1", cs->dc.icc.mon_tx[cs->dc.icc.mon_txp -1]);
428 }
429 AfterMOX1:
430 #endif
431 }
432 }
433 }
434
435 static void
ICC_l1hw(struct PStack * st,int pr,void * arg)436 ICC_l1hw(struct PStack *st, int pr, void *arg)
437 {
438 struct IsdnCardState *cs = (struct IsdnCardState *) st->l1.hardware;
439 struct sk_buff *skb = arg;
440 u_long flags;
441 int val;
442
443 switch (pr) {
444 case (PH_DATA |REQUEST):
445 if (cs->debug & DEB_DLOG_HEX)
446 LogFrame(cs, skb->data, skb->len);
447 if (cs->debug & DEB_DLOG_VERBOSE)
448 dlogframe(cs, skb, 0);
449 spin_lock_irqsave(&cs->lock, flags);
450 if (cs->tx_skb) {
451 skb_queue_tail(&cs->sq, skb);
452 #ifdef L2FRAME_DEBUG /* psa */
453 if (cs->debug & L1_DEB_LAPD)
454 Logl2Frame(cs, skb, "PH_DATA Queued", 0);
455 #endif
456 } else {
457 cs->tx_skb = skb;
458 cs->tx_cnt = 0;
459 #ifdef L2FRAME_DEBUG /* psa */
460 if (cs->debug & L1_DEB_LAPD)
461 Logl2Frame(cs, skb, "PH_DATA", 0);
462 #endif
463 icc_fill_fifo(cs);
464 }
465 spin_unlock_irqrestore(&cs->lock, flags);
466 break;
467 case (PH_PULL |INDICATION):
468 spin_lock_irqsave(&cs->lock, flags);
469 if (cs->tx_skb) {
470 if (cs->debug & L1_DEB_WARN)
471 debugl1(cs, " l2l1 tx_skb exist this shouldn't happen");
472 skb_queue_tail(&cs->sq, skb);
473 break;
474 }
475 if (cs->debug & DEB_DLOG_HEX)
476 LogFrame(cs, skb->data, skb->len);
477 if (cs->debug & DEB_DLOG_VERBOSE)
478 dlogframe(cs, skb, 0);
479 cs->tx_skb = skb;
480 cs->tx_cnt = 0;
481 #ifdef L2FRAME_DEBUG /* psa */
482 if (cs->debug & L1_DEB_LAPD)
483 Logl2Frame(cs, skb, "PH_DATA_PULLED", 0);
484 #endif
485 icc_fill_fifo(cs);
486 spin_unlock_irqrestore(&cs->lock, flags);
487 break;
488 case (PH_PULL | REQUEST):
489 #ifdef L2FRAME_DEBUG /* psa */
490 if (cs->debug & L1_DEB_LAPD)
491 debugl1(cs, "-> PH_REQUEST_PULL");
492 #endif
493 if (!cs->tx_skb) {
494 test_and_clear_bit(FLG_L1_PULL_REQ, &st->l1.Flags);
495 st->l1.l1l2(st, PH_PULL | CONFIRM, NULL);
496 } else
497 test_and_set_bit(FLG_L1_PULL_REQ, &st->l1.Flags);
498 break;
499 case (HW_RESET | REQUEST):
500 spin_lock_irqsave(&cs->lock, flags);
501 if ((cs->dc.icc.ph_state == ICC_IND_EI1) ||
502 (cs->dc.icc.ph_state == ICC_IND_DR))
503 ph_command(cs, ICC_CMD_DI);
504 else
505 ph_command(cs, ICC_CMD_RES);
506 spin_unlock_irqrestore(&cs->lock, flags);
507 break;
508 case (HW_ENABLE | REQUEST):
509 spin_lock_irqsave(&cs->lock, flags);
510 ph_command(cs, ICC_CMD_DI);
511 spin_unlock_irqrestore(&cs->lock, flags);
512 break;
513 case (HW_INFO1 | REQUEST):
514 spin_lock_irqsave(&cs->lock, flags);
515 ph_command(cs, ICC_CMD_AR);
516 spin_unlock_irqrestore(&cs->lock, flags);
517 break;
518 case (HW_INFO3 | REQUEST):
519 spin_lock_irqsave(&cs->lock, flags);
520 ph_command(cs, ICC_CMD_AI);
521 spin_unlock_irqrestore(&cs->lock, flags);
522 break;
523 case (HW_TESTLOOP | REQUEST):
524 spin_lock_irqsave(&cs->lock, flags);
525 val = 0;
526 if (1 & (long) arg)
527 val |= 0x0c;
528 if (2 & (long) arg)
529 val |= 0x3;
530 if (test_bit(HW_IOM1, &cs->HW_Flags)) {
531 /* IOM 1 Mode */
532 if (!val) {
533 cs->writeisac(cs, ICC_SPCR, 0xa);
534 cs->writeisac(cs, ICC_ADF1, 0x2);
535 } else {
536 cs->writeisac(cs, ICC_SPCR, val);
537 cs->writeisac(cs, ICC_ADF1, 0xa);
538 }
539 } else {
540 /* IOM 2 Mode */
541 cs->writeisac(cs, ICC_SPCR, val);
542 if (val)
543 cs->writeisac(cs, ICC_ADF1, 0x8);
544 else
545 cs->writeisac(cs, ICC_ADF1, 0x0);
546 }
547 spin_unlock_irqrestore(&cs->lock, flags);
548 break;
549 case (HW_DEACTIVATE | RESPONSE):
550 skb_queue_purge(&cs->rq);
551 skb_queue_purge(&cs->sq);
552 if (cs->tx_skb) {
553 dev_kfree_skb_any(cs->tx_skb);
554 cs->tx_skb = NULL;
555 }
556 if (test_and_clear_bit(FLG_DBUSY_TIMER, &cs->HW_Flags))
557 del_timer(&cs->dbusytimer);
558 if (test_and_clear_bit(FLG_L1_DBUSY, &cs->HW_Flags))
559 schedule_event(cs, D_CLEARBUSY);
560 break;
561 default:
562 if (cs->debug & L1_DEB_WARN)
563 debugl1(cs, "icc_l1hw unknown %04x", pr);
564 break;
565 }
566 }
567
568 static void
setstack_icc(struct PStack * st,struct IsdnCardState * cs)569 setstack_icc(struct PStack *st, struct IsdnCardState *cs)
570 {
571 st->l1.l1hw = ICC_l1hw;
572 }
573
574 static void
DC_Close_icc(struct IsdnCardState * cs)575 DC_Close_icc(struct IsdnCardState *cs) {
576 kfree(cs->dc.icc.mon_rx);
577 cs->dc.icc.mon_rx = NULL;
578 kfree(cs->dc.icc.mon_tx);
579 cs->dc.icc.mon_tx = NULL;
580 }
581
582 static void
dbusy_timer_handler(struct IsdnCardState * cs)583 dbusy_timer_handler(struct IsdnCardState *cs)
584 {
585 struct PStack *stptr;
586 int rbch, star;
587
588 if (test_bit(FLG_DBUSY_TIMER, &cs->HW_Flags)) {
589 rbch = cs->readisac(cs, ICC_RBCH);
590 star = cs->readisac(cs, ICC_STAR);
591 if (cs->debug)
592 debugl1(cs, "D-Channel Busy RBCH %02x STAR %02x",
593 rbch, star);
594 if (rbch & ICC_RBCH_XAC) { /* D-Channel Busy */
595 test_and_set_bit(FLG_L1_DBUSY, &cs->HW_Flags);
596 stptr = cs->stlist;
597 while (stptr != NULL) {
598 stptr->l1.l1l2(stptr, PH_PAUSE | INDICATION, NULL);
599 stptr = stptr->next;
600 }
601 } else {
602 /* discard frame; reset transceiver */
603 test_and_clear_bit(FLG_DBUSY_TIMER, &cs->HW_Flags);
604 if (cs->tx_skb) {
605 dev_kfree_skb_any(cs->tx_skb);
606 cs->tx_cnt = 0;
607 cs->tx_skb = NULL;
608 } else {
609 printk(KERN_WARNING "HiSax: ICC D-Channel Busy no skb\n");
610 debugl1(cs, "D-Channel Busy no skb");
611 }
612 cs->writeisac(cs, ICC_CMDR, 0x01); /* Transmitter reset */
613 cs->irq_func(cs->irq, cs);
614 }
615 }
616 }
617
618 void
initicc(struct IsdnCardState * cs)619 initicc(struct IsdnCardState *cs)
620 {
621 cs->setstack_d = setstack_icc;
622 cs->DC_Close = DC_Close_icc;
623 cs->dc.icc.mon_tx = NULL;
624 cs->dc.icc.mon_rx = NULL;
625 cs->writeisac(cs, ICC_MASK, 0xff);
626 cs->dc.icc.mocr = 0xaa;
627 if (test_bit(HW_IOM1, &cs->HW_Flags)) {
628 /* IOM 1 Mode */
629 cs->writeisac(cs, ICC_ADF2, 0x0);
630 cs->writeisac(cs, ICC_SPCR, 0xa);
631 cs->writeisac(cs, ICC_ADF1, 0x2);
632 cs->writeisac(cs, ICC_STCR, 0x70);
633 cs->writeisac(cs, ICC_MODE, 0xc9);
634 } else {
635 /* IOM 2 Mode */
636 if (!cs->dc.icc.adf2)
637 cs->dc.icc.adf2 = 0x80;
638 cs->writeisac(cs, ICC_ADF2, cs->dc.icc.adf2);
639 cs->writeisac(cs, ICC_SQXR, 0xa0);
640 cs->writeisac(cs, ICC_SPCR, 0x20);
641 cs->writeisac(cs, ICC_STCR, 0x70);
642 cs->writeisac(cs, ICC_MODE, 0xca);
643 cs->writeisac(cs, ICC_TIMR, 0x00);
644 cs->writeisac(cs, ICC_ADF1, 0x20);
645 }
646 ph_command(cs, ICC_CMD_RES);
647 cs->writeisac(cs, ICC_MASK, 0x0);
648 ph_command(cs, ICC_CMD_DI);
649 }
650
651 void
clear_pending_icc_ints(struct IsdnCardState * cs)652 clear_pending_icc_ints(struct IsdnCardState *cs)
653 {
654 int val, eval;
655
656 val = cs->readisac(cs, ICC_STAR);
657 debugl1(cs, "ICC STAR %x", val);
658 val = cs->readisac(cs, ICC_MODE);
659 debugl1(cs, "ICC MODE %x", val);
660 val = cs->readisac(cs, ICC_ADF2);
661 debugl1(cs, "ICC ADF2 %x", val);
662 val = cs->readisac(cs, ICC_ISTA);
663 debugl1(cs, "ICC ISTA %x", val);
664 if (val & 0x01) {
665 eval = cs->readisac(cs, ICC_EXIR);
666 debugl1(cs, "ICC EXIR %x", eval);
667 }
668 val = cs->readisac(cs, ICC_CIR0);
669 debugl1(cs, "ICC CIR0 %x", val);
670 cs->dc.icc.ph_state = (val >> 2) & 0xf;
671 schedule_event(cs, D_L1STATECHANGE);
672 /* Disable all IRQ */
673 cs->writeisac(cs, ICC_MASK, 0xFF);
674 }
675
676 void __devinit
setup_icc(struct IsdnCardState * cs)677 setup_icc(struct IsdnCardState *cs)
678 {
679 INIT_WORK(&cs->tqueue, icc_bh);
680 cs->dbusytimer.function = (void *) dbusy_timer_handler;
681 cs->dbusytimer.data = (long) cs;
682 init_timer(&cs->dbusytimer);
683 }
684