aboutsummaryrefslogtreecommitdiff
path: root/drivers/isdn/hardware/eicon/di.c
blob: b029d130eb2186fa28e5efed25cccdce9342a31b (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835

/*
 *
  Copyright (c) Eicon Networks, 2002.
 *
  This source file is supplied for the use with
  Eicon Networks range of DIVA Server Adapters.
 *
  Eicon File Revision :    2.1
 *
  This program is free software; you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
  the Free Software Foundation; either version 2, or (at your option)
  any later version.
 *
  This program is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY OF ANY KIND WHATSOEVER INCLUDING ANY
  implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  See the GNU General Public License for more details.
 *
  You should have received a copy of the GNU General Public License
  along with this program; if not, write to the Free Software
  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 */
#include "platform.h"
#include "pc.h"
#include "pr_pc.h"
#include "di_defs.h"
#include "di.h"
#if !defined USE_EXTENDED_DEBUGS
  #include "dimaint.h"
#else
  #define dprintf
#endif
#include "io.h"
#include "dfifo.h"
#define PR_RAM  ((struct pr_ram *)0)
#define RAM ((struct dual *)0)
/*------------------------------------------------------------------*/
/* local function prototypes                                        */
/*------------------------------------------------------------------*/
void pr_out(ADAPTER * a);
byte pr_dpc(ADAPTER * a);
static byte pr_ready(ADAPTER * a);
static byte isdn_rc(ADAPTER *, byte, byte, byte, word, dword, dword);
static byte isdn_ind(ADAPTER *, byte, byte, byte, PBUFFER *, byte, word);
/* -----------------------------------------------------------------
    Functions used for the extended XDI Debug
    macros
    global convergence counter (used by all adapters)
    Look by the implementation part of the functions
    about the parameters.
    If you change the dubugging parameters, then you should update
    the aididbg.doc in the IDI doc's.
   ----------------------------------------------------------------- */
#if defined(XDI_USE_XLOG)
#define XDI_A_NR(_x_) ((byte)(((ISDN_ADAPTER *)(_x_->io))->ANum))
static void xdi_xlog (byte *msg, word code, int length);
static byte xdi_xlog_sec = 0;
#else
#define XDI_A_NR(_x_) ((byte)0)
#endif
static void xdi_xlog_rc_event (byte Adapter,
                               byte Id, byte Ch, byte Rc, byte cb, byte type);
static void xdi_xlog_request (byte Adapter, byte Id,
                              byte Ch, byte Req, byte type);
static void xdi_xlog_ind (byte Adapter,
                          byte Id,
                          byte Ch,
                          byte Ind,
                          byte rnr_valid,
                          byte rnr,
                          byte type);
/*------------------------------------------------------------------*/
/* output function                                                  */
/*------------------------------------------------------------------*/
void pr_out(ADAPTER * a)
{
  byte e_no;
  ENTITY  * this = NULL;
  BUFFERS  *X;
  word length;
  word i;
  word clength;
  REQ * ReqOut;
  byte more;
  byte ReadyCount;
  byte ReqCount;
  byte Id;
  dtrc(dprintf("pr_out"));
        /* while a request is pending ...                           */
  e_no = look_req(a);
  if(!e_no)
  {
    dtrc(dprintf("no_req"));
    return;
  }
  ReadyCount = pr_ready(a);
  if(!ReadyCount)
  {
    dtrc(dprintf("not_ready"));
    return;
  }
  ReqCount = 0;
  while(e_no && ReadyCount) {
    next_req(a);
    this = entity_ptr(a, e_no);
#ifdef USE_EXTENDED_DEBUGS
    if ( !this )
    {
      DBG_FTL(("XDI: [%02x] !A%d ==> NULL entity ptr - try to ignore",
               xdi_xlog_sec++, (int)((ISDN_ADAPTER *)a->io)->ANum))
      e_no = look_req(a) ;
      ReadyCount-- ;
      continue ;
    }
    {
      DBG_TRC((">A%d Id=0x%x Req=0x%x", ((ISDN_ADAPTER *)a->io)->ANum, this->Id, this->Req))
    }
#else
    dbug(dprintf("out:Req=%x,Id=%x,Ch=%x",this->Req,this->Id,this->ReqCh));
#endif
        /* get address of next available request buffer             */
    ReqOut = (REQ *)&PR_RAM->B[a->ram_inw(a, &PR_RAM->NextReq)];
#if defined(DIVA_ISTREAM)
    if (!(a->tx_stream[this->Id]   &&
        this->Req == N_DATA)) {
#endif
        /* now copy the data from the current data buffer into the  */
        /* adapters request buffer                                  */
    length = 0;
    i = this->XCurrent;
    X = PTR_X(a,this);
    while(i<this->XNum && length<270) {
      clength = min((word)(270-length),(word)(X[i].PLength-this->XOffset));
      a->ram_out_buffer(a,
                        &ReqOut->XBuffer.P[length],
                        PTR_P(a,this,&X[i].P[this->XOffset]),
                        clength);
      length +=clength;
      this->XOffset +=clength;
      if(this->XOffset==X[i].PLength) {
        this->XCurrent = (byte)++i;
        this->XOffset = 0;
      }
    }
#if defined(DIVA_ISTREAM)
   } else { /* Use CMA extension in order to transfer data to the card */
      i = this->XCurrent;
      X = PTR_X(a,this);
      while (i < this->XNum) {
        diva_istream_write (a,
                            this->Id,
                            PTR_P(a,this,&X[i].P[0]),
                            X[i].PLength,
                            ((i+1) == this->XNum),
                            0, 0);
        this->XCurrent = (byte)++i;
      }
      length = 0;
   }
#endif
    a->ram_outw(a, &ReqOut->XBuffer.length, length);
    a->ram_out(a, &ReqOut->ReqId, this->Id);
    a->ram_out(a, &ReqOut->ReqCh, this->ReqCh);
        /* if it's a specific request (no ASSIGN) ...                */
    if(this->Id &0x1f) {
        /* if buffers are left in the list of data buffers do       */
        /* do chaining (LL_MDATA, N_MDATA)                          */
      this->More++;
      if(i<this->XNum && this->MInd) {
        xdi_xlog_request (XDI_A_NR(a), this->Id, this->ReqCh, this->MInd,
                          a->IdTypeTable[this->No]);
        a->ram_out(a, &ReqOut->Req, this->MInd);
        more = true;
      }
      else {
        xdi_xlog_request (XDI_A_NR(a), this->Id, this->ReqCh, this->Req,
                          a->IdTypeTable[this->No]);
        this->More |=XMOREF;
        a->ram_out(a, &ReqOut->Req, this->Req);
        more = false;
        if (a->FlowControlIdTable[this->ReqCh] == this->Id)
          a->FlowControlSkipTable[this->ReqCh] = true;
        /*
           Note that remove request was sent to the card
           */
        if (this->Req == REMOVE) {
          a->misc_flags_table[e_no] |= DIVA_MISC_FLAGS_REMOVE_PENDING;
        }
      }
        /* if we did chaining, this entity is put back into the     */
        /* request queue                                            */
      if(more) {
        req_queue(a,this->No);
      }
    }
        /* else it's a ASSIGN                                       */
    else {
        /* save the request code used for buffer chaining           */
      this->MInd = 0;
      if (this->Id==BLLC_ID) this->MInd = LL_MDATA;
      if (this->Id==NL_ID   ||
          this->Id==TASK_ID ||
          this->Id==MAN_ID
        ) this->MInd = N_MDATA;
        /* send the ASSIGN                                          */
      a->IdTypeTable[this->No] = this->Id;
      xdi_xlog_request (XDI_A_NR(a),this->Id,this->ReqCh,this->Req, this->Id);
      this->More |=XMOREF;
      a->ram_out(a, &ReqOut->Req, this->Req);
        /* save the reference of the ASSIGN                         */
      assign_queue(a, this->No, a->ram_inw(a, &ReqOut->Reference));
    }
    a->ram_outw(a, &PR_RAM->NextReq, a->ram_inw(a, &ReqOut->next));
    ReadyCount--;
    ReqCount++;
    e_no = look_req(a);
  }
        /* send the filled request buffers to the ISDN adapter      */
  a->ram_out(a, &PR_RAM->ReqInput,
             (byte)(a->ram_in(a, &PR_RAM->ReqInput) + ReqCount));
        /* if it is a 'unreturncoded' UREMOVE request, remove the  */
        /* Id from our table after sending the request             */
  if(this && (this->Req==UREMOVE) && this->Id) {
    Id = this->Id;
    e_no = a->IdTable[Id];
    free_entity(a, e_no);
    for (i = 0; i < 256; i++)
    {
      if (a->FlowControlIdTable[i] == Id)
        a->FlowControlIdTable[i] = 0;
    }
    a->IdTable[Id] = 0;
    this->Id = 0;
  }
}
static byte pr_ready(ADAPTER * a)
{
  byte ReadyCount;
  ReadyCount = (byte)(a->ram_in(a, &PR_RAM->ReqOutput) -
                      a->ram_in(a, &PR_RAM->ReqInput));
  if(!ReadyCount) {
    if(!a->ReadyInt) {
      a->ram_inc(a, &PR_RAM->ReadyInt);
      a->ReadyInt++;
    }
  }
  return ReadyCount;
}
/*------------------------------------------------------------------*/
/* isdn interrupt handler                                           */
/*------------------------------------------------------------------*/
byte pr_dpc(ADAPTER * a)
{
  byte Count;
  RC * RcIn;
  IND * IndIn;
  byte c;
  byte RNRId;
  byte Rc;
  byte Ind;
        /* if return codes are available ...                        */
  if((Count = a->ram_in(a, &PR_RAM->RcOutput)) != 0) {
    dtrc(dprintf("#Rc=%x",Count));
        /* get the buffer address of the first return code          */
    RcIn = (RC *)&PR_RAM->B[a->ram_inw(a, &PR_RAM->NextRc)];
        /* for all return codes do ...                              */
    while(Count--) {
      if((Rc=a->ram_in(a, &RcIn->Rc)) != 0) {
        dword tmp[2];
        /*
          Get extended information, associated with return code
          */
        a->ram_in_buffer(a,
                         &RcIn->Reserved2[0],
                         (byte*)&tmp[0],
                         8);
        /* call return code handler, if it is not our return code   */
        /* the handler returns 2                                    */
        /* for all return codes we process, we clear the Rc field   */
        isdn_rc(a,
                Rc,
                a->ram_in(a, &RcIn->RcId),
                a->ram_in(a, &RcIn->RcCh),
                a->ram_inw(a, &RcIn->Reference),
                tmp[0],  /* type of extended information */
                tmp[1]); /* extended information        */
        a->ram_out(a, &RcIn->Rc, 0);
      }
        /* get buffer address of next return code                   */
      RcIn = (RC *)&PR_RAM->B[a->ram_inw(a, &RcIn->next)];
    }
        /* clear all return codes (no chaining!)                    */
    a->ram_out(a, &PR_RAM->RcOutput ,0);
        /* call output function                                     */
    pr_out(a);
  }
        /* clear RNR flag                                           */
  RNRId = 0;
        /* if indications are available ...                         */
  if((Count = a->ram_in(a, &PR_RAM->IndOutput)) != 0) {
    dtrc(dprintf("#Ind=%x",Count));
        /* get the buffer address of the first indication           */
    IndIn = (IND *)&PR_RAM->B[a->ram_inw(a, &PR_RAM->NextInd)];
        /* for all indications do ...                               */
    while(Count--) {
        /* if the application marks an indication as RNR, all       */
        /* indications from the same Id delivered in this interrupt */
        /* are marked RNR                                           */
      if(RNRId && RNRId==a->ram_in(a, &IndIn->IndId)) {
        a->ram_out(a, &IndIn->Ind, 0);
        a->ram_out(a, &IndIn->RNR, true);
      }
      else {
        Ind = a->ram_in(a, &IndIn->Ind);
        if(Ind) {
          RNRId = 0;
        /* call indication handler, a return value of 2 means chain */
        /* a return value of 1 means RNR                            */
        /* for all indications we process, we clear the Ind field   */
          c = isdn_ind(a,
                       Ind,
                       a->ram_in(a, &IndIn->IndId),
                       a->ram_in(a, &IndIn->IndCh),
                       &IndIn->RBuffer,
                       a->ram_in(a, &IndIn->MInd),
                       a->ram_inw(a, &IndIn->MLength));
          if(c==1) {
            dtrc(dprintf("RNR"));
            a->ram_out(a, &IndIn->Ind, 0);
            RNRId = a->ram_in(a, &IndIn->IndId);
            a->ram_out(a, &IndIn->RNR, true);
          }
        }
      }
        /* get buffer address of next indication                    */
      IndIn = (IND *)&PR_RAM->B[a->ram_inw(a, &IndIn->next)];
    }
    a->ram_out(a, &PR_RAM->IndOutput, 0);
  }
  return false;
}
byte scom_test_int(ADAPTER * a)
{
  return a->ram_in(a,(void *)0x3fe);
}
void scom_clear_int(ADAPTER * a)
{
  a->ram_out(a,(void *)0x3fe,0);
}
/*------------------------------------------------------------------*/
/* return code handler                                              */
/*------------------------------------------------------------------*/
static byte isdn_rc(ADAPTER *a,
		    byte Rc,
		    byte Id,
		    byte Ch,
		    word Ref,
		    dword extended_info_type,
		    dword extended_info)
{
  ENTITY  * this;
  byte e_no;
  word i;
  int cancel_rc;
#ifdef USE_EXTENDED_DEBUGS
  {
    DBG_TRC(("<A%d Id=0x%x Rc=0x%x", ((ISDN_ADAPTER *)a->io)->ANum, Id, Rc))
  }
#else
  dbug(dprintf("isdn_rc(Rc=%x,Id=%x,Ch=%x)",Rc,Id,Ch));
#endif
        /* check for ready interrupt                                */
  if(Rc==READY_INT) {
    xdi_xlog_rc_event (XDI_A_NR(a), Id, Ch, Rc, 0, 0);
    if(a->ReadyInt) {
      a->ReadyInt--;
      return 0;
    }
    return 2;
  }
        /* if we know this Id ...                                   */
  e_no = a->IdTable[Id];
  if(e_no) {
    this = entity_ptr(a,e_no);
    xdi_xlog_rc_event (XDI_A_NR(a), Id, Ch, Rc, 0, a->IdTypeTable[this->No]);
    this->RcCh = Ch;
        /* if it is a return code to a REMOVE request, remove the   */
        /* Id from our table                                        */
    if ((a->misc_flags_table[e_no] & DIVA_MISC_FLAGS_REMOVE_PENDING) &&
        (Rc==OK)) {
      if (a->IdTypeTable[e_no] == NL_ID) {
        if (a->RcExtensionSupported &&
            (extended_info_type != DIVA_RC_TYPE_REMOVE_COMPLETE)) {
        dtrc(dprintf("XDI: N-REMOVE, A(%02x) Id:%02x, ignore RC=OK",
                        XDI_A_NR(a),Id));
          return (0);
        }
        if (extended_info_type == DIVA_RC_TYPE_REMOVE_COMPLETE)
          a->RcExtensionSupported = true;
      }
      a->misc_flags_table[e_no] &= ~DIVA_MISC_FLAGS_REMOVE_PENDING;
      a->misc_flags_table[e_no] &= ~DIVA_MISC_FLAGS_NO_RC_CANCELLING;
      free_entity(a, e_no);
      for (i = 0; i < 256; i++)
      {
        if (a->FlowControlIdTable[i] == Id)
          a->FlowControlIdTable[i] = 0;
      }
      a->IdTable[Id] = 0;
      this->Id = 0;
      /* ---------------------------------------------------------------
        If we send N_DISC or N_DISK_ACK after we have received OK_FC
        then the card will respond with OK_FC and later with RC==OK.
        If we send N_REMOVE in this state we will receive only RC==OK
        This will create the state in that the XDI is waiting for the
        additional RC and does not delivery the RC to the client. This
        code corrects the counter of outstanding RC's in this case.
      --------------------------------------------------------------- */
      if ((this->More & XMOREC) > 1) {
        this->More &= ~XMOREC;
        this->More |= 1;
        dtrc(dprintf("XDI: correct MORE on REMOVE A(%02x) Id:%02x",
                     XDI_A_NR(a),Id));
      }
    }
    if (Rc==OK_FC) {
      a->FlowControlIdTable[Ch] = Id;
      a->FlowControlSkipTable[Ch] = false;
      this->Rc = Rc;
      this->More &= ~(XBUSY | XMOREC);
      this->complete=0xff;
      xdi_xlog_rc_event (XDI_A_NR(a), Id, Ch, Rc, 1, a->IdTypeTable[this->No]);
      CALLBACK(a, this);
      return 0;
    }
    /*
      New protocol code sends return codes that comes from release
      of flow control condition marked with DIVA_RC_TYPE_OK_FC extended
      information element type.
      If like return code arrives then application is able to process
      all return codes self and XDI should not cances return codes.
      This return code does not decrement XMOREC partial return code
      counter due to fact that it was no request for this return code,
      also XMOREC was not incremented.
      */
    if (extended_info_type == DIVA_RC_TYPE_OK_FC) {
      a->misc_flags_table[e_no] |= DIVA_MISC_FLAGS_NO_RC_CANCELLING;
      this->Rc = Rc;
      this->complete=0xff;
      xdi_xlog_rc_event (XDI_A_NR(a), Id, Ch, Rc, 1, a->IdTypeTable[this->No]);
      DBG_TRC(("XDI OK_FC A(%02x) Id:%02x Ch:%02x Rc:%02x",
      XDI_A_NR(a), Id, Ch, Rc))
      CALLBACK(a, this);
      return 0;
    }
    cancel_rc = !(a->misc_flags_table[e_no] & DIVA_MISC_FLAGS_NO_RC_CANCELLING);
    if (cancel_rc && (a->FlowControlIdTable[Ch] == Id))
    {
      a->FlowControlIdTable[Ch] = 0;
      if ((Rc != OK) || !a->FlowControlSkipTable[Ch])
      {
        this->Rc = Rc;
        if (Ch == this->ReqCh)
        {
          this->More &=~(XBUSY | XMOREC);
          this->complete=0xff;
        }
        xdi_xlog_rc_event (XDI_A_NR(a), Id, Ch, Rc, 1, a->IdTypeTable[this->No]);
        CALLBACK(a, this);
      }
      return 0;
    }
    if (this->More &XMOREC)
      this->More--;
        /* call the application callback function                   */
    if (((!cancel_rc) || (this->More & XMOREF)) && !(this->More & XMOREC)) {
      this->Rc = Rc;
      this->More &=~XBUSY;
      this->complete=0xff;
      xdi_xlog_rc_event (XDI_A_NR(a), Id, Ch, Rc, 1, a->IdTypeTable[this->No]);
      CALLBACK(a, this);
    }
    return 0;
  }
        /* if it's an ASSIGN return code check if it's a return     */
        /* code to an ASSIGN request from us                        */
  if((Rc &0xf0)==ASSIGN_RC) {
    e_no = get_assign(a, Ref);
    if(e_no) {
      this = entity_ptr(a,e_no);
      this->Id = Id;
      xdi_xlog_rc_event (XDI_A_NR(a), Id, Ch, Rc, 2, a->IdTypeTable[this->No]);
        /* call the application callback function                   */
      this->Rc = Rc;
      this->More &=~XBUSY;
      this->complete=0xff;
#if defined(DIVA_ISTREAM) /* { */
      if ((Rc == ASSIGN_OK) && a->ram_offset &&
          (a->IdTypeTable[this->No] == NL_ID) &&
          ((extended_info_type == DIVA_RC_TYPE_RX_DMA) ||
          (extended_info_type == DIVA_RC_TYPE_CMA_PTR)) &&
          extended_info) {
        dword offset = (*(a->ram_offset)) (a);
        dword tmp[2];
        extended_info -= offset;
#ifdef PLATFORM_GT_32BIT
        a->ram_in_dw(a, (void*)ULongToPtr(extended_info), (dword*)&tmp[0], 2);
#else
        a->ram_in_dw(a, (void*)extended_info, (dword*)&tmp[0], 2);
#endif
        a->tx_stream[Id]  = tmp[0];
        a->rx_stream[Id]  = tmp[1];
        if (extended_info_type == DIVA_RC_TYPE_RX_DMA) {
          DBG_TRC(("Id=0x%x RxDMA=%08x:%08x",
                    Id, a->tx_stream[Id], a->rx_stream[Id]))
          a->misc_flags_table[this->No] |= DIVA_MISC_FLAGS_RX_DMA;
        } else {
          DBG_TRC(("Id=0x%x CMA=%08x:%08x",
                    Id, a->tx_stream[Id], a->rx_stream[Id]))
          a->misc_flags_table[this->No] &= ~DIVA_MISC_FLAGS_RX_DMA;
          a->rx_pos[Id]     = 0;
          a->rx_stream[Id] -= offset;
        }
        a->tx_pos[Id]     = 0;
        a->tx_stream[Id] -= offset;
      } else {
        a->tx_stream[Id] = 0;
        a->rx_stream[Id] = 0;
        a->misc_flags_table[this->No] &= ~DIVA_MISC_FLAGS_RX_DMA;
      }
#endif /* } */
      CALLBACK(a, this);
      if(Rc==ASSIGN_OK) {
        a->IdTable[Id] = e_no;
      }
      else
      {
        free_entity(a, e_no);
        for (i = 0; i < 256; i++)
        {
          if (a->FlowControlIdTable[i] == Id)
            a->FlowControlIdTable[i] = 0;
        }
        a->IdTable[Id] = 0;
        this->Id = 0;
      }
      return 1;
    }
  }
  return 2;
}
/*------------------------------------------------------------------*/
/* indication handler                                               */
/*------------------------------------------------------------------*/
static byte isdn_ind(ADAPTER *a,
		     byte Ind,
		     byte Id,
		     byte Ch,
		     PBUFFER *RBuffer,
		     byte MInd,
		     word MLength)
{
  ENTITY  * this;
  word clength;
  word offset;
  BUFFERS  *R;
  byte* cma = NULL;
#ifdef USE_EXTENDED_DEBUGS
  {
    DBG_TRC(("<A%d Id=0x%x Ind=0x%x", ((ISDN_ADAPTER *)a->io)->ANum, Id, Ind))
  }
#else
  dbug(dprintf("isdn_ind(Ind=%x,Id=%x,Ch=%x)",Ind,Id,Ch));
#endif
  if(a->IdTable[Id]) {
    this = entity_ptr(a,a->IdTable[Id]);
    this->IndCh = Ch;
    xdi_xlog_ind (XDI_A_NR(a), Id, Ch, Ind,
                  0/* rnr_valid */, 0 /* rnr */, a->IdTypeTable[this->No]);
        /* if the Receive More flag is not yet set, this is the     */
        /* first buffer of the packet                               */
    if(this->RCurrent==0xff) {
        /* check for receive buffer chaining                        */
      if(Ind==this->MInd) {
        this->complete = 0;
        this->Ind = MInd;
      }
      else {
        this->complete = 1;
        this->Ind = Ind;
      }
        /* call the application callback function for the receive   */
        /* look ahead                                               */
      this->RLength = MLength;
#if defined(DIVA_ISTREAM)
      if ((a->rx_stream[this->Id] ||
           (a->misc_flags_table[this->No] & DIVA_MISC_FLAGS_RX_DMA)) &&
          ((Ind == N_DATA) ||
           (a->protocol_capabilities & PROTCAP_CMA_ALLPR))) {
        PISDN_ADAPTER IoAdapter = (PISDN_ADAPTER)a->io ;
        if (a->misc_flags_table[this->No] & DIVA_MISC_FLAGS_RX_DMA) {
#if defined(DIVA_IDI_RX_DMA)
          dword d;
          diva_get_dma_map_entry (\
                   (struct _diva_dma_map_entry*)IoAdapter->dma_map,
                   (int)a->rx_stream[this->Id], (void**)&cma, &d);
#else
          cma = &a->stream_buffer[0];
          cma[0] = cma[1] = cma[2] = cma[3] = 0;
#endif
          this->RLength = MLength = (word)*(dword*)cma;
          cma += 4;
        } else {
        int final = 0;
        cma = &a->stream_buffer[0];
        this->RLength = MLength = (word)diva_istream_read (a,
                                                     Id,
                                                     cma,
                                                     sizeof(a->stream_buffer),
                                                     &final, NULL, NULL);
        }
        IoAdapter->RBuffer.length = min(MLength, (word)270);
        if (IoAdapter->RBuffer.length != MLength) {
          this->complete = 0;
        } else {
          this->complete = 1;
        }
        memcpy (IoAdapter->RBuffer.P, cma, IoAdapter->RBuffer.length) ;
        this->RBuffer = (DBUFFER *)&IoAdapter->RBuffer ;
      }
#endif
      if (!cma) {
        a->ram_look_ahead(a, RBuffer, this);
      }
      this->RNum = 0;
      CALLBACK(a, this);
        /* map entity ptr, selector could be re-mapped by call to   */
        /* IDI from within callback                                 */
      this = entity_ptr(a,a->IdTable[Id]);
      xdi_xlog_ind (XDI_A_NR(a), Id, Ch, Ind,
          1/* rnr_valid */, this->RNR/* rnr */, a->IdTypeTable[this->No]);
        /* check for RNR                                            */
      if(this->RNR==1) {
        this->RNR = 0;
        return 1;
      }
        /* if no buffers are provided by the application, the       */
        /* application want to copy the data itself including       */
        /* N_MDATA/LL_MDATA chaining                                */
      if(!this->RNR && !this->RNum) {
        xdi_xlog_ind (XDI_A_NR(a), Id, Ch, Ind,
            2/* rnr_valid */, 0/* rnr */, a->IdTypeTable[this->No]);
        return 0;
      }
        /* if there is no RNR, set the More flag                    */
      this->RCurrent = 0;
      this->ROffset = 0;
    }
    if(this->RNR==2) {
      if(Ind!=this->MInd) {
        this->RCurrent = 0xff;
        this->RNR = 0;
      }
      return 0;
    }
        /* if we have received buffers from the application, copy   */
        /* the data into these buffers                              */
    offset = 0;
    R = PTR_R(a,this);
    do {
      if(this->ROffset==R[this->RCurrent].PLength) {
        this->ROffset = 0;
        this->RCurrent++;
      }
      if (cma) {
        clength = min(MLength, (word)(R[this->RCurrent].PLength-this->ROffset));
      } else {
        clength = min(a->ram_inw(a, &RBuffer->length)-offset,
                      R[this->RCurrent].PLength-this->ROffset);
      }
      if(R[this->RCurrent].P) {
        if (cma) {
          memcpy (PTR_P(a,this,&R[this->RCurrent].P[this->ROffset]),
                  &cma[offset],
                  clength);
        } else {
          a->ram_in_buffer(a,
                           &RBuffer->P[offset],
                           PTR_P(a,this,&R[this->RCurrent].P[this->ROffset]),
                           clength);
        }
      }
      offset +=clength;
      this->ROffset +=clength;
      if (cma) {
        if (offset >= MLength) {
          break;
        }
        continue;
      }
    } while(offset<(a->ram_inw(a, &RBuffer->length)));
        /* if it's the last buffer of the packet, call the          */
        /* application callback function for the receive complete   */
        /* call                                                     */
    if(Ind!=this->MInd) {
      R[this->RCurrent].PLength = this->ROffset;
      if(this->ROffset) this->RCurrent++;
      this->RNum = this->RCurrent;
      this->RCurrent = 0xff;
      this->Ind = Ind;
      this->complete = 2;
      xdi_xlog_ind (XDI_A_NR(a), Id, Ch, Ind,
          3/* rnr_valid */, 0/* rnr */, a->IdTypeTable[this->No]);
      CALLBACK(a, this);
    }
    return 0;
  }
  return 2;
}
#if defined(XDI_USE_XLOG)
/* -----------------------------------------------------------
   This function works in the same way as xlog on the
   active board
   ----------------------------------------------------------- */
static void xdi_xlog (byte *msg, word code, int length) {
  xdi_dbg_xlog ("\x00\x02", msg, code, length);
}
#endif
/* -----------------------------------------------------------
    This function writes the information about the Return Code
    processing in the trace buffer. Trace ID is 221.
    INPUT:
        Adapter - system unicue adapter number (0 ... 255)
        Id      - Id of the entity that had sent this return code
        Ch      - Channel of the entity that had sent this return code
        Rc      - return code value
        cb:       (0...2)
                  switch (cb) {
                   case 0: printf ("DELIVERY"); break;
                   case 1: printf ("CALLBACK"); break;
                   case 2: printf ("ASSIGN"); break;
                  }
                  DELIVERY - have entered isdn_rc with this RC
                  CALLBACK - about to make callback to the application
                             for this RC
                  ASSIGN   - about to make callback for RC that is result
                             of ASSIGN request. It is no DELIVERY message
                             before of this message
        type   - the Id that was sent by the ASSIGN of this entity.
                 This should be global Id like NL_ID, DSIG_ID, MAN_ID.
                 An unknown Id will cause "?-" in the front of the request.
                 In this case the log.c is to be extended.
   ----------------------------------------------------------- */
static void xdi_xlog_rc_event (byte Adapter,
                               byte Id, byte Ch, byte Rc, byte cb, byte type) {
#if defined(XDI_USE_XLOG)
  word LogInfo[4];
  PUT_WORD(&LogInfo[0], ((word)Adapter | (word)(xdi_xlog_sec++ << 8)));
  PUT_WORD(&LogInfo[1], ((word)Id | (word)(Ch << 8)));
  PUT_WORD(&LogInfo[2], ((word)Rc | (word)(type << 8)));
  PUT_WORD(&LogInfo[3], cb);
  xdi_xlog ((byte*)&LogInfo[0], 221, sizeof(LogInfo));
#endif
}
/* ------------------------------------------------------------------------
    This function writes the information about the request processing
    in the trace buffer. Trace ID is 220.
    INPUT:
        Adapter - system unicue adapter number (0 ... 255)
        Id      - Id of the entity that had sent this request
        Ch      - Channel of the entity that had sent this request
        Req     - Code of the request
        type    - the Id that was sent by the ASSIGN of this entity.
                  This should be global Id like NL_ID, DSIG_ID, MAN_ID.
                  An unknown Id will cause "?-" in the front of the request.
                  In this case the log.c is to be extended.
   ------------------------------------------------------------------------ */
static void xdi_xlog_request (byte Adapter, byte Id,
                              byte Ch, byte Req, byte type) {
#if defined(XDI_USE_XLOG)
  word LogInfo[3];
  PUT_WORD(&LogInfo[0], ((word)Adapter | (word)(xdi_xlog_sec++ << 8)));
  PUT_WORD(&LogInfo[1], ((word)Id | (word)(Ch << 8)));
  PUT_WORD(&LogInfo[2], ((word)Req | (word)(type << 8)));
  xdi_xlog ((byte*)&LogInfo[0], 220, sizeof(LogInfo));
#endif
}
/* ------------------------------------------------------------------------
    This function writes the information about the indication processing
    in the trace buffer. Trace ID is 222.
    INPUT:
        Adapter - system unicue adapter number (0 ... 255)
        Id      - Id of the entity that had sent this indication
        Ch      - Channel of the entity that had sent this indication
        Ind     - Code of the indication
        rnr_valid: (0 .. 3) supported
          switch (rnr_valid) {
            case 0: printf ("DELIVERY"); break;
            case 1: printf ("RNR=%d", rnr);
            case 2: printf ("RNum=0");
            case 3: printf ("COMPLETE");
          }
          DELIVERY - indication entered isdn_rc function
          RNR=...  - application had returned RNR=... after the
                     look ahead callback
          RNum=0   - aplication had not returned any buffer to copy
                     this indication and will copy it self
          COMPLETE - XDI had copied the data to the buffers provided
                     bu the application and is about to issue the
                     final callback
        rnr:  Look case 1 of the rnr_valid
        type: the Id that was sent by the ASSIGN of this entity. This should
              be global Id like NL_ID, DSIG_ID, MAN_ID. An unknown Id will
              cause "?-" in the front of the request. In this case the
              log.c is to be extended.
   ------------------------------------------------------------------------ */
static void xdi_xlog_ind (byte Adapter,
                          byte Id,
                          byte Ch,
                          byte Ind,
                          byte rnr_valid,
                          byte rnr,
                          byte type) {
#if defined(XDI_USE_XLOG)
  word LogInfo[4];
  PUT_WORD(&LogInfo[0], ((word)Adapter | (word)(xdi_xlog_sec++ << 8)));
  PUT_WORD(&LogInfo[1], ((word)Id | (word)(Ch << 8)));
  PUT_WORD(&LogInfo[2], ((word)Ind | (word)(type << 8)));
  PUT_WORD(&LogInfo[3], ((word)rnr | (word)(rnr_valid << 8)));
  xdi_xlog ((byte*)&LogInfo[0], 222, sizeof(LogInfo));
#endif
}