1 /* gerdes_amd7930.c,v 0.99 2001/10/02
2 *
3 * gerdes_amd7930.c Amd 79C30A and 79C32A specific routines
4 * (based on HiSax driver by Karsten Keil)
5 *
6 * Author Christoph Ersfeld <info@formula-n.de>
7 * Formula-n Europe AG (www.formula-n.com)
8 * previously Gerdes AG
9 *
10 *
11 * This file is (c) under GNU PUBLIC LICENSE
12 *
13 *
14 * Notes:
15 * Version 0.99 is the first release of this driver and there are
16 * certainly a few bugs.
17 *
18 * Please don't report any malfunction to me without sending
19 * (compressed) debug-logs.
20 * It would be nearly impossible to retrace it.
21 *
22 * Log D-channel-processing as follows:
23 *
24 * 1. Load hisax with card-specific parameters, this example ist for
25 * Formula-n enter:now ISDN PCI and compatible
26 * (f.e. Gerdes Power ISDN PCI)
27 *
28 * modprobe hisax type=41 protocol=2 id=gerdes
29 *
30 * if you chose an other value for id, you need to modify the
31 * code below, too.
32 *
33 * 2. set debug-level
34 *
35 * hisaxctrl gerdes 1 0x3ff
36 * hisaxctrl gerdes 11 0x4f
37 * cat /dev/isdnctrl >> ~/log &
38 *
39 * Please take also a look into /var/log/messages if there is
40 * anything importand concerning HISAX.
41 *
42 *
43 * Credits:
44 * Programming the driver for Formula-n enter:now ISDN PCI and
45 * necessary this driver for the used Amd 7930 D-channel-controller
46 * was spnsored by Formula-n Europe AG.
47 * Thanks to Karsten Keil and Petr Novak, who gave me support in
48 * Hisax-specific questions.
49 * I want so say special thanks to Carl-Friedrich Braun, who had to
50 * answer a lot of questions about generally ISDN and about handling
51 * of the Amd-Chip.
52 *
53 */
54
55
56 #include "hisax.h"
57 #include "isdnl1.h"
58 #include "isac.h"
59 #include "amd7930_fn.h"
60 #include <linux/interrupt.h>
61 #include <linux/init.h>
62
63 static void Amd7930_new_ph(struct IsdnCardState *cs);
64
65 static WORD initAMD[] = {
66 0x0100,
67
68 0x00A5, 3, 0x01, 0x40, 0x58, // LPR, LMR1, LMR2
69 0x0086, 1, 0x0B, // DMR1 (D-Buffer TH-Interrupts on)
70 0x0087, 1, 0xFF, // DMR2
71 0x0092, 1, 0x03, // EFCR (extended mode d-channel-fifo on)
72 0x0090, 4, 0xFE, 0xFF, 0x02, 0x0F, // FRAR4, SRAR4, DMR3, DMR4 (address recognition )
73 0x0084, 2, 0x80, 0x00, // DRLR
74 0x00C0, 1, 0x47, // PPCR1
75 0x00C8, 1, 0x01, // PPCR2
76
77 0x0102,
78 0x0107,
79 0x01A1, 1,
80 0x0121, 1,
81 0x0189, 2,
82
83 0x0045, 4, 0x61, 0x72, 0x00, 0x00, // MCR1, MCR2, MCR3, MCR4
84 0x0063, 2, 0x08, 0x08, // GX
85 0x0064, 2, 0x08, 0x08, // GR
86 0x0065, 2, 0x99, 0x00, // GER
87 0x0066, 2, 0x7C, 0x8B, // STG
88 0x0067, 2, 0x00, 0x00, // FTGR1, FTGR2
89 0x0068, 2, 0x20, 0x20, // ATGR1, ATGR2
90 0x0069, 1, 0x4F, // MMR1
91 0x006A, 1, 0x00, // MMR2
92 0x006C, 1, 0x40, // MMR3
93 0x0021, 1, 0x02, // INIT
94 0x00A3, 1, 0x40, // LMR1
95
96 0xFFFF
97 };
98
99
100 static void /* macro wWordAMD */
101 WriteWordAmd7930(struct IsdnCardState *cs, BYTE reg, WORD val)
102 {
103 wByteAMD(cs, 0x00, reg);
104 wByteAMD(cs, 0x01, LOBYTE(val));
105 wByteAMD(cs, 0x01, HIBYTE(val));
106 }
107
108 static WORD /* macro rWordAMD */
109 ReadWordAmd7930(struct IsdnCardState *cs, BYTE reg)
110 {
111 WORD res;
112 /* direct access register */
113 if(reg < 8) {
114 res = rByteAMD(cs, reg);
115 res += 256*rByteAMD(cs, reg);
116 }
117 /* indirect access register */
118 else {
119 wByteAMD(cs, 0x00, reg);
120 res = rByteAMD(cs, 0x01);
121 res += 256*rByteAMD(cs, 0x01);
122 }
123 return (res);
124 }
125
126
127 static void
128 Amd7930_ph_command(struct IsdnCardState *cs, u_char command, char *s)
129 {
130 if (cs->debug & L1_DEB_ISAC)
131 debugl1(cs, "AMD7930: %s: ph_command 0x%02X", s, command);
132
133 cs->dc.amd7930.lmr1 = command;
134 wByteAMD(cs, 0xA3, command);
135 }
136
137
138
139 static BYTE i430States[] = {
140 // to reset F3 F4 F5 F6 F7 F8 AR from
141 0x01, 0x02, 0x00, 0x00, 0x00, 0x07, 0x05, 0x00, // init
142 0x01, 0x02, 0x00, 0x00, 0x00, 0x07, 0x05, 0x00, // reset
143 0x01, 0x02, 0x00, 0x00, 0x00, 0x09, 0x05, 0x04, // F3
144 0x01, 0x02, 0x00, 0x00, 0x1B, 0x00, 0x00, 0x00, // F4
145 0x01, 0x02, 0x00, 0x00, 0x1B, 0x00, 0x00, 0x00, // F5
146 0x01, 0x03, 0x00, 0x00, 0x00, 0x06, 0x05, 0x00, // F6
147 0x11, 0x13, 0x00, 0x00, 0x1B, 0x00, 0x15, 0x00, // F7
148 0x01, 0x03, 0x00, 0x00, 0x00, 0x06, 0x00, 0x00, // F8
149 0x01, 0x03, 0x00, 0x00, 0x00, 0x09, 0x00, 0x0A}; // AR
150
151
152 /* Row init - reset F3 F4 F5 F6 F7 F8 AR */
153 static BYTE stateHelper[] = { 0x00, 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08 };
154
155
156
157
158 static void
159 Amd7930_get_state(struct IsdnCardState *cs) {
160 BYTE lsr = rByteAMD(cs, 0xA1);
161 cs->dc.amd7930.ph_state = (lsr & 0x7) + 2;
162 Amd7930_new_ph(cs);
163 }
164
165
166
167 static void
168 Amd7930_new_ph(struct IsdnCardState *cs)
169 {
170 u_char index = stateHelper[cs->dc.amd7930.old_state]*8 + stateHelper[cs->dc.amd7930.ph_state]-1;
171 u_char message = i430States[index];
172
173 if (cs->debug & L1_DEB_ISAC)
174 debugl1(cs, "AMD7930: new_ph %d, old_ph %d, message %d, index %d",
175 cs->dc.amd7930.ph_state, cs->dc.amd7930.old_state, message & 0x0f, index);
176
177 cs->dc.amd7930.old_state = cs->dc.amd7930.ph_state;
178
179 /* abort transmit if nessesary */
180 if ((message & 0xf0) && (cs->tx_skb)) {
181 wByteAMD(cs, 0x21, 0xC2);
182 wByteAMD(cs, 0x21, 0x02);
183 }
184
185 switch (message & 0x0f) {
186
187 case (1):
188 l1_msg(cs, HW_RESET | INDICATION, NULL);
189 Amd7930_get_state(cs);
190 break;
191 case (2): /* init, Card starts in F3 */
192 l1_msg(cs, HW_DEACTIVATE | CONFIRM, NULL);
193 break;
194 case (3):
195 l1_msg(cs, HW_DEACTIVATE | INDICATION, NULL);
196 break;
197 case (4):
198 l1_msg(cs, HW_POWERUP | CONFIRM, NULL);
199 Amd7930_ph_command(cs, 0x50, "HW_ENABLE REQUEST");
200 break;
201 case (5):
202 l1_msg(cs, HW_RSYNC | INDICATION, NULL);
203 break;
204 case (6):
205 l1_msg(cs, HW_INFO4_P8 | INDICATION, NULL);
206 break;
207 case (7): /* init, Card starts in F7 */
208 l1_msg(cs, HW_RSYNC | INDICATION, NULL);
209 l1_msg(cs, HW_INFO4_P8 | INDICATION, NULL);
210 break;
211 case (8):
212 l1_msg(cs, HW_POWERUP | CONFIRM, NULL);
213 /* fall through */
214 case (9):
215 Amd7930_ph_command(cs, 0x40, "HW_ENABLE REQ cleared if set");
216 l1_msg(cs, HW_RSYNC | INDICATION, NULL);
217 l1_msg(cs, HW_INFO2 | INDICATION, NULL);
218 l1_msg(cs, HW_INFO4_P8 | INDICATION, NULL);
219 break;
220 case (10):
221 Amd7930_ph_command(cs, 0x40, "T3 expired, HW_ENABLE REQ cleared");
222 cs->dc.amd7930.old_state = 3;
223 break;
224 case (11):
225 l1_msg(cs, HW_INFO2 | INDICATION, NULL);
226 break;
227 default:
228 break;
229 }
230 }
231
232
233
234 static void
235 Amd7930_bh(struct work_struct *work)
236 {
237 struct IsdnCardState *cs =
238 container_of(work, struct IsdnCardState, tqueue);
239 struct PStack *stptr;
240
241 if (!cs)
242 return;
243 if (test_and_clear_bit(D_CLEARBUSY, &cs->event)) {
244 if (cs->debug)
245 debugl1(cs, "Amd7930: bh, D-Channel Busy cleared");
246 stptr = cs->stlist;
247 while (stptr != NULL) {
248 stptr->l1.l1l2(stptr, PH_PAUSE | CONFIRM, NULL);
249 stptr = stptr->next;
250 }
251 }
252 if (test_and_clear_bit(D_L1STATECHANGE, &cs->event)) {
253 if (cs->debug & L1_DEB_ISAC)
254 debugl1(cs, "AMD7930: bh, D_L1STATECHANGE");
255 Amd7930_new_ph(cs);
256 }
257
258 if (test_and_clear_bit(D_RCVBUFREADY, &cs->event)) {
259 if (cs->debug & L1_DEB_ISAC)
260 debugl1(cs, "AMD7930: bh, D_RCVBUFREADY");
261 DChannel_proc_rcv(cs);
262 }
263
264 if (test_and_clear_bit(D_XMTBUFREADY, &cs->event)) {
265 if (cs->debug & L1_DEB_ISAC)
266 debugl1(cs, "AMD7930: bh, D_XMTBUFREADY");
267 DChannel_proc_xmt(cs);
268 }
269 }
270
271 static void
272 Amd7930_empty_Dfifo(struct IsdnCardState *cs, int flag)
273 {
274
275 BYTE stat, der;
276 BYTE *ptr;
277 struct sk_buff *skb;
278
279
280 if ((cs->debug & L1_DEB_ISAC) && !(cs->debug & L1_DEB_ISAC_FIFO))
281 debugl1(cs, "Amd7930: empty_Dfifo");
282
283
284 ptr = cs->rcvbuf + cs->rcvidx;
285
286 /* AMD interrupts off */
287 AmdIrqOff(cs);
288
289 /* read D-Channel-Fifo*/
290 stat = rByteAMD(cs, 0x07); // DSR2
291
292 /* while Data in Fifo ... */
293 while ( (stat & 2) && ((ptr-cs->rcvbuf) < MAX_DFRAME_LEN_L1) ) {
294 *ptr = rByteAMD(cs, 0x04); // DCRB
295 ptr++;
296 stat = rByteAMD(cs, 0x07); // DSR2
297 cs->rcvidx = ptr - cs->rcvbuf;
298
299 /* Paket ready? */
300 if (stat & 1) {
301
302 der = rWordAMD(cs, 0x03);
303
304 /* no errors, packet ok */
305 if(!der && !flag) {
306 rWordAMD(cs, 0x89); // clear DRCR
307
308 if ((cs->rcvidx) > 0) {
309 if (!(skb = alloc_skb(cs->rcvidx, GFP_ATOMIC)))
310 printk(KERN_WARNING "HiSax: Amd7930: empty_Dfifo, D receive out of memory!\n");
311 else {
312 /* Debugging */
313 if (cs->debug & L1_DEB_ISAC_FIFO) {
314 char *t = cs->dlog;
315
316 t += sprintf(t, "Amd7930: empty_Dfifo cnt: %d |", cs->rcvidx);
317 QuickHex(t, cs->rcvbuf, cs->rcvidx);
318 debugl1(cs, cs->dlog);
319 }
320 /* moves received data in sk-buffer */
321 memcpy(skb_put(skb, cs->rcvidx), cs->rcvbuf, cs->rcvidx);
322 skb_queue_tail(&cs->rq, skb);
323 }
324 }
325
326 }
327 /* throw damaged packets away, reset receive-buffer, indicate RX */
328 ptr = cs->rcvbuf;
329 cs->rcvidx = 0;
330 schedule_event(cs, D_RCVBUFREADY);
331 }
332 }
333 /* Packet to long, overflow */
334 if(cs->rcvidx >= MAX_DFRAME_LEN_L1) {
335 if (cs->debug & L1_DEB_WARN)
336 debugl1(cs, "AMD7930: empty_Dfifo L2-Framelength overrun");
337 cs->rcvidx = 0;
338 return;
339 }
340 /* AMD interrupts on */
341 AmdIrqOn(cs);
342 }
343
344
345 static void
346 Amd7930_fill_Dfifo(struct IsdnCardState *cs)
347 {
348
349 WORD dtcrr, dtcrw, len, count;
350 BYTE txstat, dmr3;
351 BYTE *ptr, *deb_ptr;
352
353 if ((cs->debug & L1_DEB_ISAC) && !(cs->debug & L1_DEB_ISAC_FIFO))
354 debugl1(cs, "Amd7930: fill_Dfifo");
355
356 if ((!cs->tx_skb) || (cs->tx_skb->len <= 0))
357 return;
358
359 dtcrw = 0;
360 if(!cs->dc.amd7930.tx_xmtlen)
361 /* new Frame */
362 len = dtcrw = cs->tx_skb->len;
363 /* continue frame */
364 else len = cs->dc.amd7930.tx_xmtlen;
365
366
367 /* AMD interrupts off */
368 AmdIrqOff(cs);
369
370 deb_ptr = ptr = cs->tx_skb->data;
371
372 /* while free place in tx-fifo available and data in sk-buffer */
373 txstat = 0x10;
374 while((txstat & 0x10) && (cs->tx_cnt < len)) {
375 wByteAMD(cs, 0x04, *ptr);
376 ptr++;
377 cs->tx_cnt++;
378 txstat= rByteAMD(cs, 0x07);
379 }
380 count = ptr - cs->tx_skb->data;
381 skb_pull(cs->tx_skb, count);
382
383
384 dtcrr = rWordAMD(cs, 0x85); // DTCR
385 dmr3 = rByteAMD(cs, 0x8E);
386
387 if (cs->debug & L1_DEB_ISAC) {
388 debugl1(cs, "Amd7930: fill_Dfifo, DMR3: 0x%02X, DTCR read: 0x%04X write: 0x%02X 0x%02X", dmr3, dtcrr, LOBYTE(dtcrw), HIBYTE(dtcrw));
389 }
390
391 /* writeing of dtcrw starts transmit */
392 if(!cs->dc.amd7930.tx_xmtlen) {
393 wWordAMD(cs, 0x85, dtcrw);
394 cs->dc.amd7930.tx_xmtlen = dtcrw;
395 }
396
397 if (test_and_set_bit(FLG_DBUSY_TIMER, &cs->HW_Flags)) {
398 debugl1(cs, "Amd7930: fill_Dfifo dbusytimer running");
399 del_timer(&cs->dbusytimer);
400 }
401 init_timer(&cs->dbusytimer);
402 cs->dbusytimer.expires = jiffies + ((DBUSY_TIMER_VALUE * HZ) / 1000);
403 add_timer(&cs->dbusytimer);
404
405 if (cs->debug & L1_DEB_ISAC_FIFO) {
406 char *t = cs->dlog;
407
408 t += sprintf(t, "Amd7930: fill_Dfifo cnt: %d |", count);
409 QuickHex(t, deb_ptr, count);
410 debugl1(cs, cs->dlog);
411 }
412 /* AMD interrupts on */
413 AmdIrqOn(cs);
414 }
415
416
417 void Amd7930_interrupt(struct IsdnCardState *cs, BYTE irflags)
418 {
419 BYTE dsr1, dsr2, lsr;
420 WORD der;
421
422 while (irflags)
423 {
424
425 dsr1 = rByteAMD(cs, 0x02);
426 der = rWordAMD(cs, 0x03);
427 dsr2 = rByteAMD(cs, 0x07);
428 lsr = rByteAMD(cs, 0xA1);
429
430 if (cs->debug & L1_DEB_ISAC)
431 debugl1(cs, "Amd7930: interrupt: flags: 0x%02X, DSR1: 0x%02X, DSR2: 0x%02X, LSR: 0x%02X, DER=0x%04X", irflags, dsr1, dsr2, lsr, der);
432
433 /* D error -> read DER and DSR2 bit 2 */
434 if (der || (dsr2 & 4)) {
435
436 if (cs->debug & L1_DEB_WARN)
437 debugl1(cs, "Amd7930: interrupt: D error DER=0x%04X", der);
438
439 /* RX, TX abort if collision detected */
440 if (der & 2) {
441 wByteAMD(cs, 0x21, 0xC2);
442 wByteAMD(cs, 0x21, 0x02);
443 if (test_and_clear_bit(FLG_DBUSY_TIMER, &cs->HW_Flags))
444 del_timer(&cs->dbusytimer);
445 if (test_and_clear_bit(FLG_L1_DBUSY, &cs->HW_Flags))
446 schedule_event(cs, D_CLEARBUSY);
447 /* restart frame */
448 if (cs->tx_skb) {
449 skb_push(cs->tx_skb, cs->tx_cnt);
450 cs->tx_cnt = 0;
451 cs->dc.amd7930.tx_xmtlen = 0;
452 Amd7930_fill_Dfifo(cs);
453 } else {
454 printk(KERN_WARNING "HiSax: Amd7930 D-Collision, no skb\n");
455 debugl1(cs, "Amd7930: interrupt: D-Collision, no skb");
456 }
457 }
458 /* remove damaged data from fifo */
459 Amd7930_empty_Dfifo(cs, 1);
460
461 if (test_and_clear_bit(FLG_DBUSY_TIMER, &cs->HW_Flags))
462 del_timer(&cs->dbusytimer);
463 if (test_and_clear_bit(FLG_L1_DBUSY, &cs->HW_Flags))
464 schedule_event(cs, D_CLEARBUSY);
465 /* restart TX-Frame */
466 if (cs->tx_skb) {
467 skb_push(cs->tx_skb, cs->tx_cnt);
468 cs->tx_cnt = 0;
469 cs->dc.amd7930.tx_xmtlen = 0;
470 Amd7930_fill_Dfifo(cs);
471 }
472 }
473
474 /* D TX FIFO empty -> fill */
475 if (irflags & 1) {
476 if (cs->debug & L1_DEB_ISAC)
477 debugl1(cs, "Amd7930: interrupt: clear Timer and fill D-TX-FIFO if data");
478
479 /* AMD interrupts off */
480 AmdIrqOff(cs);
481
482 if (test_and_clear_bit(FLG_DBUSY_TIMER, &cs->HW_Flags))
483 del_timer(&cs->dbusytimer);
484 if (test_and_clear_bit(FLG_L1_DBUSY, &cs->HW_Flags))
485 schedule_event(cs, D_CLEARBUSY);
486 if (cs->tx_skb) {
487 if (cs->tx_skb->len)
488 Amd7930_fill_Dfifo(cs);
489 }
490 /* AMD interrupts on */
491 AmdIrqOn(cs);
492 }
493
494
495 /* D RX FIFO full or tiny packet in Fifo -> empty */
496 if ((irflags & 2) || (dsr1 & 2)) {
497 if (cs->debug & L1_DEB_ISAC)
498 debugl1(cs, "Amd7930: interrupt: empty D-FIFO");
499 Amd7930_empty_Dfifo(cs, 0);
500 }
501
502
503 /* D-Frame transmit complete */
504 if (dsr1 & 64) {
505 if (cs->debug & L1_DEB_ISAC) {
506 debugl1(cs, "Amd7930: interrupt: transmit packet ready");
507 }
508 /* AMD interrupts off */
509 AmdIrqOff(cs);
510
511 if (test_and_clear_bit(FLG_DBUSY_TIMER, &cs->HW_Flags))
512 del_timer(&cs->dbusytimer);
513 if (test_and_clear_bit(FLG_L1_DBUSY, &cs->HW_Flags))
514 schedule_event(cs, D_CLEARBUSY);
515
516 if (cs->tx_skb) {
517 if (cs->debug & L1_DEB_ISAC)
518 debugl1(cs, "Amd7930: interrupt: TX-Packet ready, freeing skb");
519 dev_kfree_skb_irq(cs->tx_skb);
520 cs->tx_cnt = 0;
521 cs->dc.amd7930.tx_xmtlen=0;
522 cs->tx_skb = NULL;
523 }
524 if ((cs->tx_skb = skb_dequeue(&cs->sq))) {
525 if (cs->debug & L1_DEB_ISAC)
526 debugl1(cs, "Amd7930: interrupt: TX-Packet ready, next packet dequeued");
527 cs->tx_cnt = 0;
528 cs->dc.amd7930.tx_xmtlen=0;
529 Amd7930_fill_Dfifo(cs);
530 }
531 else
532 schedule_event(cs, D_XMTBUFREADY);
533 /* AMD interrupts on */
534 AmdIrqOn(cs);
535 }
536
537 /* LIU status interrupt -> read LSR, check statechanges */
538 if (lsr & 0x38) {
539 /* AMD interrupts off */
540 AmdIrqOff(cs);
541
542 if (cs->debug & L1_DEB_ISAC)
543 debugl1(cs, "Amd: interrupt: LSR=0x%02X, LIU is in state %d", lsr, ((lsr & 0x7) +2));
544
545 cs->dc.amd7930.ph_state = (lsr & 0x7) + 2;
546
547 schedule_event(cs, D_L1STATECHANGE);
548 /* AMD interrupts on */
549 AmdIrqOn(cs);
550 }
551
552 /* reads Interrupt-Register again. If there is a new interrupt-flag: restart handler */
553 irflags = rByteAMD(cs, 0x00);
554 }
555
556 }
557
558 static void
559 Amd7930_l1hw(struct PStack *st, int pr, void *arg)
560 {
561 struct IsdnCardState *cs = (struct IsdnCardState *) st->l1.hardware;
562 struct sk_buff *skb = arg;
563 u_long flags;
564
565 if (cs->debug & L1_DEB_ISAC)
566 debugl1(cs, "Amd7930: l1hw called, pr: 0x%04X", pr);
567
568 switch (pr) {
569 case (PH_DATA | REQUEST):
570 if (cs->debug & DEB_DLOG_HEX)
571 LogFrame(cs, skb->data, skb->len);
572 if (cs->debug & DEB_DLOG_VERBOSE)
573 dlogframe(cs, skb, 0);
574 spin_lock_irqsave(&cs->lock, flags);
575 if (cs->tx_skb) {
576 skb_queue_tail(&cs->sq, skb);
577 #ifdef L2FRAME_DEBUG /* psa */
578 if (cs->debug & L1_DEB_LAPD)
579 Logl2Frame(cs, skb, "Amd7930: l1hw: PH_DATA Queued", 0);
580 #endif
581 } else {
582 cs->tx_skb = skb;
583 cs->tx_cnt = 0;
584 cs->dc.amd7930.tx_xmtlen=0;
585 #ifdef L2FRAME_DEBUG /* psa */
586 if (cs->debug & L1_DEB_LAPD)
587 Logl2Frame(cs, skb, "Amd7930: l1hw: PH_DATA", 0);
588 #endif
589 Amd7930_fill_Dfifo(cs);
590 }
591 spin_unlock_irqrestore(&cs->lock, flags);
592 break;
593 case (PH_PULL | INDICATION):
594 spin_lock_irqsave(&cs->lock, flags);
595 if (cs->tx_skb) {
596 if (cs->debug & L1_DEB_WARN)
597 debugl1(cs, "Amd7930: l1hw: l2l1 tx_skb exist this shouldn't happen");
598 skb_queue_tail(&cs->sq, skb);
599 break;
600 }
601 if (cs->debug & DEB_DLOG_HEX)
602 LogFrame(cs, skb->data, skb->len);
603 if (cs->debug & DEB_DLOG_VERBOSE)
604 dlogframe(cs, skb, 0);
605 cs->tx_skb = skb;
606 cs->tx_cnt = 0;
607 cs->dc.amd7930.tx_xmtlen=0;
608 #ifdef L2FRAME_DEBUG /* psa */
609 if (cs->debug & L1_DEB_LAPD)
610 Logl2Frame(cs, skb, "Amd7930: l1hw: PH_DATA_PULLED", 0);
611 #endif
612 Amd7930_fill_Dfifo(cs);
613 spin_unlock_irqrestore(&cs->lock, flags);
614 break;
615 case (PH_PULL | REQUEST):
616 #ifdef L2FRAME_DEBUG /* psa */
617 if (cs->debug & L1_DEB_LAPD)
618 debugl1(cs, "Amd7930: l1hw: -> PH_REQUEST_PULL, skb: %s", (cs->tx_skb)? "yes":"no");
619 #endif
620 if (!cs->tx_skb) {
621 test_and_clear_bit(FLG_L1_PULL_REQ, &st->l1.Flags);
622 st->l1.l1l2(st, PH_PULL | CONFIRM, NULL);
623 } else
624 test_and_set_bit(FLG_L1_PULL_REQ, &st->l1.Flags);
625 break;
626 case (HW_RESET | REQUEST):
627 spin_lock_irqsave(&cs->lock, flags);
628 if ((cs->dc.amd7930.ph_state == 8)) {
629 /* b-channels off, PH-AR cleared
630 * change to F3 */
631 Amd7930_ph_command(cs, 0x20, "HW_RESET REQEST"); //LMR1 bit 5
632 spin_unlock_irqrestore(&cs->lock, flags);
633 } else {
634 Amd7930_ph_command(cs, 0x40, "HW_RESET REQUEST");
635 cs->dc.amd7930.ph_state = 2;
636 spin_unlock_irqrestore(&cs->lock, flags);
637 Amd7930_new_ph(cs);
638 }
639 break;
640 case (HW_ENABLE | REQUEST):
641 cs->dc.amd7930.ph_state = 9;
642 Amd7930_new_ph(cs);
643 break;
644 case (HW_INFO3 | REQUEST):
645 // automatic
646 break;
647 case (HW_TESTLOOP | REQUEST):
648 /* not implemented yet */
649 break;
650 case (HW_DEACTIVATE | RESPONSE):
651 skb_queue_purge(&cs->rq);
652 skb_queue_purge(&cs->sq);
653 if (cs->tx_skb) {
654 dev_kfree_skb(cs->tx_skb);
655 cs->tx_skb = NULL;
656 }
657 if (test_and_clear_bit(FLG_DBUSY_TIMER, &cs->HW_Flags))
658 del_timer(&cs->dbusytimer);
659 if (test_and_clear_bit(FLG_L1_DBUSY, &cs->HW_Flags))
660 schedule_event(cs, D_CLEARBUSY);
661 break;
662 default:
663 if (cs->debug & L1_DEB_WARN)
664 debugl1(cs, "Amd7930: l1hw: unknown %04x", pr);
665 break;
666 }
667 }
668
669 static void
670 setstack_Amd7930(struct PStack *st, struct IsdnCardState *cs)
671 {
672
673 if (cs->debug & L1_DEB_ISAC)
674 debugl1(cs, "Amd7930: setstack called");
675
676 st->l1.l1hw = Amd7930_l1hw;
677 }
678
679
680 static void
681 DC_Close_Amd7930(struct IsdnCardState *cs) {
682 if (cs->debug & L1_DEB_ISAC)
683 debugl1(cs, "Amd7930: DC_Close called");
684 }
685
686
687 static void
688 dbusy_timer_handler(struct IsdnCardState *cs)
689 {
690 u_long flags;
691 struct PStack *stptr;
692 WORD dtcr, der;
693 BYTE dsr1, dsr2;
694
695
696 if (cs->debug & L1_DEB_ISAC)
697 debugl1(cs, "Amd7930: dbusy_timer expired!");
698
699 if (test_bit(FLG_DBUSY_TIMER, &cs->HW_Flags)) {
700 spin_lock_irqsave(&cs->lock, flags);
701 /* D Transmit Byte Count Register:
702 * Counts down packet's number of Bytes, 0 if packet ready */
703 dtcr = rWordAMD(cs, 0x85);
704 dsr1 = rByteAMD(cs, 0x02);
705 dsr2 = rByteAMD(cs, 0x07);
706 der = rWordAMD(cs, 0x03);
707
708 if (cs->debug & L1_DEB_ISAC)
709 debugl1(cs, "Amd7930: dbusy_timer_handler: DSR1=0x%02X, DSR2=0x%02X, DER=0x%04X, cs->tx_skb->len=%u, tx_stat=%u, dtcr=%u, cs->tx_cnt=%u", dsr1, dsr2, der, cs->tx_skb->len, cs->dc.amd7930.tx_xmtlen, dtcr, cs->tx_cnt);
710
711 if ((cs->dc.amd7930.tx_xmtlen - dtcr) < cs->tx_cnt) { /* D-Channel Busy */
712 test_and_set_bit(FLG_L1_DBUSY, &cs->HW_Flags);
713 stptr = cs->stlist;
714 spin_unlock_irqrestore(&cs->lock, flags);
715 while (stptr != NULL) {
716 stptr->l1.l1l2(stptr, PH_PAUSE | INDICATION, NULL);
717 stptr = stptr->next;
718 }
719
720 } else {
721 /* discard frame; reset transceiver */
722 test_and_clear_bit(FLG_DBUSY_TIMER, &cs->HW_Flags);
723 if (cs->tx_skb) {
724 dev_kfree_skb_any(cs->tx_skb);
725 cs->tx_cnt = 0;
726 cs->tx_skb = NULL;
727 cs->dc.amd7930.tx_xmtlen = 0;
728 } else {
729 printk(KERN_WARNING "HiSax: Amd7930: D-Channel Busy no skb\n");
730 debugl1(cs, "Amd7930: D-Channel Busy no skb");
731
732 }
733 /* Transmitter reset, abort transmit */
734 wByteAMD(cs, 0x21, 0x82);
735 wByteAMD(cs, 0x21, 0x02);
736 spin_unlock_irqrestore(&cs->lock, flags);
737 cs->irq_func(cs->irq, cs);
738
739 if (cs->debug & L1_DEB_ISAC)
740 debugl1(cs, "Amd7930: dbusy_timer_handler: Transmitter reset");
741 }
742 }
743 }
744
745
746
747 void Amd7930_init(struct IsdnCardState *cs)
748 {
749 WORD *ptr;
750 BYTE cmd, cnt;
751
752 if (cs->debug & L1_DEB_ISAC)
753 debugl1(cs, "Amd7930: initamd called");
754
755 cs->dc.amd7930.tx_xmtlen = 0;
756 cs->dc.amd7930.old_state = 0;
757 cs->dc.amd7930.lmr1 = 0x40;
758 cs->dc.amd7930.ph_command = Amd7930_ph_command;
759 cs->setstack_d = setstack_Amd7930;
760 cs->DC_Close = DC_Close_Amd7930;
761
762 /* AMD Initialisation */
763 for (ptr = initAMD; *ptr != 0xFFFF; ) {
764 cmd = LOBYTE(*ptr);
765
766 /* read */
767 if (*ptr++ >= 0x100) {
768 if (cmd < 8)
769 /* reset register */
770 rByteAMD(cs, cmd);
771 else {
772 wByteAMD(cs, 0x00, cmd);
773 for (cnt = *ptr++; cnt > 0; cnt--)
774 rByteAMD(cs, 0x01);
775 }
776 }
777 /* write */
778 else if (cmd < 8)
779 wByteAMD(cs, cmd, LOBYTE(*ptr++));
780
781 else {
782 wByteAMD(cs, 0x00, cmd);
783 for (cnt = *ptr++; cnt > 0; cnt--)
784 wByteAMD(cs, 0x01, LOBYTE(*ptr++));
785 }
786 }
787 }
788
789 void __devinit
790 setup_Amd7930(struct IsdnCardState *cs)
791 {
792 INIT_WORK(&cs->tqueue, Amd7930_bh);
793 cs->dbusytimer.function = (void *) dbusy_timer_handler;
794 cs->dbusytimer.data = (long) cs;
795 init_timer(&cs->dbusytimer);
796 }
797
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