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/slab.h>
22 #include <linux/init.h>
23
24 #define DBUSY_TIMER_VALUE 80
25 #define ARCOFI_USE 1
26
27 static char *ISACVer[] =
28 {"2086/2186 V1.1", "2085 B1", "2085 B2",
29 "2085 V2.3"};
30
ISACVersion(struct IsdnCardState * cs,char * s)31 void 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
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, ISAC_CIX0, (command << 2) | 3);
45 }
46
47
48 static void
isac_new_ph(struct IsdnCardState * cs)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
isac_bh(struct work_struct * work)84 isac_bh(struct work_struct *work)
85 {
86 struct IsdnCardState *cs =
87 container_of(work, struct IsdnCardState, tqueue);
88 struct PStack *stptr;
89
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 static void
isac_empty_fifo(struct IsdnCardState * cs,int count)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, "%s", cs->dlog);
141 }
142 }
143
144 static void
isac_fill_fifo(struct IsdnCardState * cs)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, "%s", cs->dlog);
183 }
184 }
185
186 void
isac_interrupt(struct IsdnCardState * cs,u_char val)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 count = cs->rcvidx;
219 if (count > 0) {
220 cs->rcvidx = 0;
221 skb = alloc_skb(count, GFP_ATOMIC);
222 if (!skb)
223 printk(KERN_WARNING "HiSax: D receive out of memory\n");
224 else {
225 memcpy(skb_put(skb, count), cs->rcvbuf, count);
226 skb_queue_tail(&cs->rq, skb);
227 }
228 }
229 }
230 cs->rcvidx = 0;
231 schedule_event(cs, D_RCVBUFREADY);
232 }
233 if (val & 0x40) { /* RPF */
234 isac_empty_fifo(cs, 32);
235 }
236 if (val & 0x20) { /* RSC */
237 /* never */
238 if (cs->debug & L1_DEB_WARN)
239 debugl1(cs, "ISAC RSC interrupt");
240 }
241 if (val & 0x10) { /* XPR */
242 if (test_and_clear_bit(FLG_DBUSY_TIMER, &cs->HW_Flags))
243 del_timer(&cs->dbusytimer);
244 if (test_and_clear_bit(FLG_L1_DBUSY, &cs->HW_Flags))
245 schedule_event(cs, D_CLEARBUSY);
246 if (cs->tx_skb) {
247 if (cs->tx_skb->len) {
248 isac_fill_fifo(cs);
249 goto afterXPR;
250 } else {
251 dev_kfree_skb_irq(cs->tx_skb);
252 cs->tx_cnt = 0;
253 cs->tx_skb = NULL;
254 }
255 }
256 cs->tx_skb = skb_dequeue(&cs->sq);
257 if (cs->tx_skb) {
258 cs->tx_cnt = 0;
259 isac_fill_fifo(cs);
260 } else
261 schedule_event(cs, D_XMTBUFREADY);
262 }
263 afterXPR:
264 if (val & 0x04) { /* CISQ */
265 exval = cs->readisac(cs, ISAC_CIR0);
266 if (cs->debug & L1_DEB_ISAC)
267 debugl1(cs, "ISAC CIR0 %02X", exval);
268 if (exval & 2) {
269 cs->dc.isac.ph_state = (exval >> 2) & 0xf;
270 if (cs->debug & L1_DEB_ISAC)
271 debugl1(cs, "ph_state change %x", cs->dc.isac.ph_state);
272 schedule_event(cs, D_L1STATECHANGE);
273 }
274 if (exval & 1) {
275 exval = cs->readisac(cs, ISAC_CIR1);
276 if (cs->debug & L1_DEB_ISAC)
277 debugl1(cs, "ISAC CIR1 %02X", exval);
278 }
279 }
280 if (val & 0x02) { /* SIN */
281 /* never */
282 if (cs->debug & L1_DEB_WARN)
283 debugl1(cs, "ISAC SIN interrupt");
284 }
285 if (val & 0x01) { /* EXI */
286 exval = cs->readisac(cs, ISAC_EXIR);
287 if (cs->debug & L1_DEB_WARN)
288 debugl1(cs, "ISAC EXIR %02x", exval);
289 if (exval & 0x80) { /* XMR */
290 debugl1(cs, "ISAC XMR");
291 printk(KERN_WARNING "HiSax: ISAC XMR\n");
292 }
293 if (exval & 0x40) { /* XDU */
294 debugl1(cs, "ISAC XDU");
295 printk(KERN_WARNING "HiSax: ISAC XDU\n");
296 #ifdef ERROR_STATISTIC
297 cs->err_tx++;
298 #endif
299 if (test_and_clear_bit(FLG_DBUSY_TIMER, &cs->HW_Flags))
300 del_timer(&cs->dbusytimer);
301 if (test_and_clear_bit(FLG_L1_DBUSY, &cs->HW_Flags))
302 schedule_event(cs, D_CLEARBUSY);
303 if (cs->tx_skb) { /* Restart frame */
304 skb_push(cs->tx_skb, cs->tx_cnt);
305 cs->tx_cnt = 0;
306 isac_fill_fifo(cs);
307 } else {
308 printk(KERN_WARNING "HiSax: ISAC XDU no skb\n");
309 debugl1(cs, "ISAC XDU no skb");
310 }
311 }
312 if (exval & 0x04) { /* MOS */
313 v1 = cs->readisac(cs, ISAC_MOSR);
314 if (cs->debug & L1_DEB_MONITOR)
315 debugl1(cs, "ISAC MOSR %02x", v1);
316 #if ARCOFI_USE
317 if (v1 & 0x08) {
318 if (!cs->dc.isac.mon_rx) {
319 cs->dc.isac.mon_rx = kmalloc(MAX_MON_FRAME, GFP_ATOMIC);
320 if (!cs->dc.isac.mon_rx) {
321 if (cs->debug & L1_DEB_WARN)
322 debugl1(cs, "ISAC MON RX out of memory!");
323 cs->dc.isac.mocr &= 0xf0;
324 cs->dc.isac.mocr |= 0x0a;
325 cs->writeisac(cs, ISAC_MOCR, cs->dc.isac.mocr);
326 goto afterMONR0;
327 } else
328 cs->dc.isac.mon_rxp = 0;
329 }
330 if (cs->dc.isac.mon_rxp >= MAX_MON_FRAME) {
331 cs->dc.isac.mocr &= 0xf0;
332 cs->dc.isac.mocr |= 0x0a;
333 cs->writeisac(cs, ISAC_MOCR, cs->dc.isac.mocr);
334 cs->dc.isac.mon_rxp = 0;
335 if (cs->debug & L1_DEB_WARN)
336 debugl1(cs, "ISAC MON RX overflow!");
337 goto afterMONR0;
338 }
339 cs->dc.isac.mon_rx[cs->dc.isac.mon_rxp++] = cs->readisac(cs, ISAC_MOR0);
340 if (cs->debug & L1_DEB_MONITOR)
341 debugl1(cs, "ISAC MOR0 %02x", cs->dc.isac.mon_rx[cs->dc.isac.mon_rxp - 1]);
342 if (cs->dc.isac.mon_rxp == 1) {
343 cs->dc.isac.mocr |= 0x04;
344 cs->writeisac(cs, ISAC_MOCR, cs->dc.isac.mocr);
345 }
346 }
347 afterMONR0:
348 if (v1 & 0x80) {
349 if (!cs->dc.isac.mon_rx) {
350 cs->dc.isac.mon_rx = kmalloc(MAX_MON_FRAME, GFP_ATOMIC);
351 if (!cs->dc.isac.mon_rx) {
352 if (cs->debug & L1_DEB_WARN)
353 debugl1(cs, "ISAC MON RX out of memory!");
354 cs->dc.isac.mocr &= 0x0f;
355 cs->dc.isac.mocr |= 0xa0;
356 cs->writeisac(cs, ISAC_MOCR, cs->dc.isac.mocr);
357 goto afterMONR1;
358 } else
359 cs->dc.isac.mon_rxp = 0;
360 }
361 if (cs->dc.isac.mon_rxp >= MAX_MON_FRAME) {
362 cs->dc.isac.mocr &= 0x0f;
363 cs->dc.isac.mocr |= 0xa0;
364 cs->writeisac(cs, ISAC_MOCR, cs->dc.isac.mocr);
365 cs->dc.isac.mon_rxp = 0;
366 if (cs->debug & L1_DEB_WARN)
367 debugl1(cs, "ISAC MON RX overflow!");
368 goto afterMONR1;
369 }
370 cs->dc.isac.mon_rx[cs->dc.isac.mon_rxp++] = cs->readisac(cs, ISAC_MOR1);
371 if (cs->debug & L1_DEB_MONITOR)
372 debugl1(cs, "ISAC MOR1 %02x", cs->dc.isac.mon_rx[cs->dc.isac.mon_rxp - 1]);
373 cs->dc.isac.mocr |= 0x40;
374 cs->writeisac(cs, ISAC_MOCR, cs->dc.isac.mocr);
375 }
376 afterMONR1:
377 if (v1 & 0x04) {
378 cs->dc.isac.mocr &= 0xf0;
379 cs->writeisac(cs, ISAC_MOCR, cs->dc.isac.mocr);
380 cs->dc.isac.mocr |= 0x0a;
381 cs->writeisac(cs, ISAC_MOCR, cs->dc.isac.mocr);
382 schedule_event(cs, D_RX_MON0);
383 }
384 if (v1 & 0x40) {
385 cs->dc.isac.mocr &= 0x0f;
386 cs->writeisac(cs, ISAC_MOCR, cs->dc.isac.mocr);
387 cs->dc.isac.mocr |= 0xa0;
388 cs->writeisac(cs, ISAC_MOCR, cs->dc.isac.mocr);
389 schedule_event(cs, D_RX_MON1);
390 }
391 if (v1 & 0x02) {
392 if ((!cs->dc.isac.mon_tx) || (cs->dc.isac.mon_txc &&
393 (cs->dc.isac.mon_txp >= cs->dc.isac.mon_txc) &&
394 !(v1 & 0x08))) {
395 cs->dc.isac.mocr &= 0xf0;
396 cs->writeisac(cs, ISAC_MOCR, cs->dc.isac.mocr);
397 cs->dc.isac.mocr |= 0x0a;
398 cs->writeisac(cs, ISAC_MOCR, cs->dc.isac.mocr);
399 if (cs->dc.isac.mon_txc &&
400 (cs->dc.isac.mon_txp >= cs->dc.isac.mon_txc))
401 schedule_event(cs, D_TX_MON0);
402 goto AfterMOX0;
403 }
404 if (cs->dc.isac.mon_txc && (cs->dc.isac.mon_txp >= cs->dc.isac.mon_txc)) {
405 schedule_event(cs, D_TX_MON0);
406 goto AfterMOX0;
407 }
408 cs->writeisac(cs, ISAC_MOX0,
409 cs->dc.isac.mon_tx[cs->dc.isac.mon_txp++]);
410 if (cs->debug & L1_DEB_MONITOR)
411 debugl1(cs, "ISAC %02x -> MOX0", cs->dc.isac.mon_tx[cs->dc.isac.mon_txp - 1]);
412 }
413 AfterMOX0:
414 if (v1 & 0x20) {
415 if ((!cs->dc.isac.mon_tx) || (cs->dc.isac.mon_txc &&
416 (cs->dc.isac.mon_txp >= cs->dc.isac.mon_txc) &&
417 !(v1 & 0x80))) {
418 cs->dc.isac.mocr &= 0x0f;
419 cs->writeisac(cs, ISAC_MOCR, cs->dc.isac.mocr);
420 cs->dc.isac.mocr |= 0xa0;
421 cs->writeisac(cs, ISAC_MOCR, cs->dc.isac.mocr);
422 if (cs->dc.isac.mon_txc &&
423 (cs->dc.isac.mon_txp >= cs->dc.isac.mon_txc))
424 schedule_event(cs, D_TX_MON1);
425 goto AfterMOX1;
426 }
427 if (cs->dc.isac.mon_txc && (cs->dc.isac.mon_txp >= cs->dc.isac.mon_txc)) {
428 schedule_event(cs, D_TX_MON1);
429 goto AfterMOX1;
430 }
431 cs->writeisac(cs, ISAC_MOX1,
432 cs->dc.isac.mon_tx[cs->dc.isac.mon_txp++]);
433 if (cs->debug & L1_DEB_MONITOR)
434 debugl1(cs, "ISAC %02x -> MOX1", cs->dc.isac.mon_tx[cs->dc.isac.mon_txp - 1]);
435 }
436 AfterMOX1:;
437 #endif
438 }
439 }
440 }
441
442 static void
ISAC_l1hw(struct PStack * st,int pr,void * arg)443 ISAC_l1hw(struct PStack *st, int pr, void *arg)
444 {
445 struct IsdnCardState *cs = (struct IsdnCardState *) st->l1.hardware;
446 struct sk_buff *skb = arg;
447 u_long flags;
448 int val;
449
450 switch (pr) {
451 case (PH_DATA | REQUEST):
452 if (cs->debug & DEB_DLOG_HEX)
453 LogFrame(cs, skb->data, skb->len);
454 if (cs->debug & DEB_DLOG_VERBOSE)
455 dlogframe(cs, skb, 0);
456 spin_lock_irqsave(&cs->lock, flags);
457 if (cs->tx_skb) {
458 skb_queue_tail(&cs->sq, skb);
459 #ifdef L2FRAME_DEBUG /* psa */
460 if (cs->debug & L1_DEB_LAPD)
461 Logl2Frame(cs, skb, "PH_DATA Queued", 0);
462 #endif
463 } else {
464 cs->tx_skb = skb;
465 cs->tx_cnt = 0;
466 #ifdef L2FRAME_DEBUG /* psa */
467 if (cs->debug & L1_DEB_LAPD)
468 Logl2Frame(cs, skb, "PH_DATA", 0);
469 #endif
470 isac_fill_fifo(cs);
471 }
472 spin_unlock_irqrestore(&cs->lock, flags);
473 break;
474 case (PH_PULL | INDICATION):
475 spin_lock_irqsave(&cs->lock, flags);
476 if (cs->tx_skb) {
477 if (cs->debug & L1_DEB_WARN)
478 debugl1(cs, " l2l1 tx_skb exist this shouldn't happen");
479 skb_queue_tail(&cs->sq, skb);
480 } else {
481 if (cs->debug & DEB_DLOG_HEX)
482 LogFrame(cs, skb->data, skb->len);
483 if (cs->debug & DEB_DLOG_VERBOSE)
484 dlogframe(cs, skb, 0);
485 cs->tx_skb = skb;
486 cs->tx_cnt = 0;
487 #ifdef L2FRAME_DEBUG /* psa */
488 if (cs->debug & L1_DEB_LAPD)
489 Logl2Frame(cs, skb, "PH_DATA_PULLED", 0);
490 #endif
491 isac_fill_fifo(cs);
492 }
493 spin_unlock_irqrestore(&cs->lock, flags);
494 break;
495 case (PH_PULL | REQUEST):
496 #ifdef L2FRAME_DEBUG /* psa */
497 if (cs->debug & L1_DEB_LAPD)
498 debugl1(cs, "-> PH_REQUEST_PULL");
499 #endif
500 if (!cs->tx_skb) {
501 test_and_clear_bit(FLG_L1_PULL_REQ, &st->l1.Flags);
502 st->l1.l1l2(st, PH_PULL | CONFIRM, NULL);
503 } else
504 test_and_set_bit(FLG_L1_PULL_REQ, &st->l1.Flags);
505 break;
506 case (HW_RESET | REQUEST):
507 spin_lock_irqsave(&cs->lock, flags);
508 if ((cs->dc.isac.ph_state == ISAC_IND_EI) ||
509 (cs->dc.isac.ph_state == ISAC_IND_DR) ||
510 (cs->dc.isac.ph_state == ISAC_IND_RS))
511 ph_command(cs, ISAC_CMD_TIM);
512 else
513 ph_command(cs, ISAC_CMD_RS);
514 spin_unlock_irqrestore(&cs->lock, flags);
515 break;
516 case (HW_ENABLE | REQUEST):
517 spin_lock_irqsave(&cs->lock, flags);
518 ph_command(cs, ISAC_CMD_TIM);
519 spin_unlock_irqrestore(&cs->lock, flags);
520 break;
521 case (HW_INFO3 | REQUEST):
522 spin_lock_irqsave(&cs->lock, flags);
523 ph_command(cs, ISAC_CMD_AR8);
524 spin_unlock_irqrestore(&cs->lock, flags);
525 break;
526 case (HW_TESTLOOP | REQUEST):
527 spin_lock_irqsave(&cs->lock, flags);
528 val = 0;
529 if (1 & (long) arg)
530 val |= 0x0c;
531 if (2 & (long) arg)
532 val |= 0x3;
533 if (test_bit(HW_IOM1, &cs->HW_Flags)) {
534 /* IOM 1 Mode */
535 if (!val) {
536 cs->writeisac(cs, ISAC_SPCR, 0xa);
537 cs->writeisac(cs, ISAC_ADF1, 0x2);
538 } else {
539 cs->writeisac(cs, ISAC_SPCR, val);
540 cs->writeisac(cs, ISAC_ADF1, 0xa);
541 }
542 } else {
543 /* IOM 2 Mode */
544 cs->writeisac(cs, ISAC_SPCR, val);
545 if (val)
546 cs->writeisac(cs, ISAC_ADF1, 0x8);
547 else
548 cs->writeisac(cs, ISAC_ADF1, 0x0);
549 }
550 spin_unlock_irqrestore(&cs->lock, flags);
551 break;
552 case (HW_DEACTIVATE | RESPONSE):
553 skb_queue_purge(&cs->rq);
554 skb_queue_purge(&cs->sq);
555 if (cs->tx_skb) {
556 dev_kfree_skb_any(cs->tx_skb);
557 cs->tx_skb = NULL;
558 }
559 if (test_and_clear_bit(FLG_DBUSY_TIMER, &cs->HW_Flags))
560 del_timer(&cs->dbusytimer);
561 if (test_and_clear_bit(FLG_L1_DBUSY, &cs->HW_Flags))
562 schedule_event(cs, D_CLEARBUSY);
563 break;
564 default:
565 if (cs->debug & L1_DEB_WARN)
566 debugl1(cs, "isac_l1hw unknown %04x", pr);
567 break;
568 }
569 }
570
571 static void
setstack_isac(struct PStack * st,struct IsdnCardState * cs)572 setstack_isac(struct PStack *st, struct IsdnCardState *cs)
573 {
574 st->l1.l1hw = ISAC_l1hw;
575 }
576
577 static void
DC_Close_isac(struct IsdnCardState * cs)578 DC_Close_isac(struct IsdnCardState *cs)
579 {
580 kfree(cs->dc.isac.mon_rx);
581 cs->dc.isac.mon_rx = NULL;
582 kfree(cs->dc.isac.mon_tx);
583 cs->dc.isac.mon_tx = NULL;
584 }
585
586 static void
dbusy_timer_handler(struct IsdnCardState * cs)587 dbusy_timer_handler(struct IsdnCardState *cs)
588 {
589 struct PStack *stptr;
590 int rbch, star;
591
592 if (test_bit(FLG_DBUSY_TIMER, &cs->HW_Flags)) {
593 rbch = cs->readisac(cs, ISAC_RBCH);
594 star = cs->readisac(cs, ISAC_STAR);
595 if (cs->debug)
596 debugl1(cs, "D-Channel Busy RBCH %02x STAR %02x",
597 rbch, star);
598 if (rbch & ISAC_RBCH_XAC) { /* D-Channel Busy */
599 test_and_set_bit(FLG_L1_DBUSY, &cs->HW_Flags);
600 stptr = cs->stlist;
601 while (stptr != NULL) {
602 stptr->l1.l1l2(stptr, PH_PAUSE | INDICATION, NULL);
603 stptr = stptr->next;
604 }
605 } else {
606 /* discard frame; reset transceiver */
607 test_and_clear_bit(FLG_DBUSY_TIMER, &cs->HW_Flags);
608 if (cs->tx_skb) {
609 dev_kfree_skb_any(cs->tx_skb);
610 cs->tx_cnt = 0;
611 cs->tx_skb = NULL;
612 } else {
613 printk(KERN_WARNING "HiSax: ISAC D-Channel Busy no skb\n");
614 debugl1(cs, "D-Channel Busy no skb");
615 }
616 cs->writeisac(cs, ISAC_CMDR, 0x01); /* Transmitter reset */
617 cs->irq_func(cs->irq, cs);
618 }
619 }
620 }
621
initisac(struct IsdnCardState * cs)622 void initisac(struct IsdnCardState *cs)
623 {
624 cs->setstack_d = setstack_isac;
625 cs->DC_Close = DC_Close_isac;
626 cs->dc.isac.mon_tx = NULL;
627 cs->dc.isac.mon_rx = NULL;
628 cs->writeisac(cs, ISAC_MASK, 0xff);
629 cs->dc.isac.mocr = 0xaa;
630 if (test_bit(HW_IOM1, &cs->HW_Flags)) {
631 /* IOM 1 Mode */
632 cs->writeisac(cs, ISAC_ADF2, 0x0);
633 cs->writeisac(cs, ISAC_SPCR, 0xa);
634 cs->writeisac(cs, ISAC_ADF1, 0x2);
635 cs->writeisac(cs, ISAC_STCR, 0x70);
636 cs->writeisac(cs, ISAC_MODE, 0xc9);
637 } else {
638 /* IOM 2 Mode */
639 if (!cs->dc.isac.adf2)
640 cs->dc.isac.adf2 = 0x80;
641 cs->writeisac(cs, ISAC_ADF2, cs->dc.isac.adf2);
642 cs->writeisac(cs, ISAC_SQXR, 0x2f);
643 cs->writeisac(cs, ISAC_SPCR, 0x00);
644 cs->writeisac(cs, ISAC_STCR, 0x70);
645 cs->writeisac(cs, ISAC_MODE, 0xc9);
646 cs->writeisac(cs, ISAC_TIMR, 0x00);
647 cs->writeisac(cs, ISAC_ADF1, 0x00);
648 }
649 ph_command(cs, ISAC_CMD_RS);
650 cs->writeisac(cs, ISAC_MASK, 0x0);
651 }
652
clear_pending_isac_ints(struct IsdnCardState * cs)653 void 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
setup_isac(struct IsdnCardState * cs)677 void setup_isac(struct IsdnCardState *cs)
678 {
679 INIT_WORK(&cs->tqueue, isac_bh);
680 cs->dbusytimer.function = (void *) dbusy_timer_handler;
681 cs->dbusytimer.data = (long) cs;
682 init_timer(&cs->dbusytimer);
683 }
684