forked from torvalds/linux
-
Notifications
You must be signed in to change notification settings - Fork 17
/
lmc_media.c
1212 lines (1058 loc) · 34.3 KB
/
lmc_media.c
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
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
/* $Id: lmc_media.c,v 1.13 2000/04/11 05:25:26 asj Exp $ */
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/timer.h>
#include <linux/ptrace.h>
#include <linux/errno.h>
#include <linux/ioport.h>
#include <linux/interrupt.h>
#include <linux/in.h>
#include <linux/if_arp.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/skbuff.h>
#include <linux/inet.h>
#include <linux/bitops.h>
#include <asm/processor.h> /* Processor type for cache alignment. */
#include <asm/io.h>
#include <asm/dma.h>
#include <linux/uaccess.h>
#include "lmc.h"
#include "lmc_var.h"
#include "lmc_ioctl.h"
#include "lmc_debug.h"
#define CONFIG_LMC_IGNORE_HARDWARE_HANDSHAKE 1
/*
* Copyright (c) 1997-2000 LAN Media Corporation (LMC)
* All rights reserved. www.lanmedia.com
*
* This code is written by:
* Andrew Stanley-Jones ([email protected])
* Rob Braun ([email protected]),
* Michael Graff ([email protected]) and
* Matt Thomas ([email protected]).
*
* This software may be used and distributed according to the terms
* of the GNU General Public License version 2, incorporated herein by reference.
*/
/*
* protocol independent method.
*/
static void lmc_set_protocol (lmc_softc_t * const, lmc_ctl_t *);
/*
* media independent methods to check on media status, link, light LEDs,
* etc.
*/
static void lmc_ds3_init (lmc_softc_t * const);
static void lmc_ds3_default (lmc_softc_t * const);
static void lmc_ds3_set_status (lmc_softc_t * const, lmc_ctl_t *);
static void lmc_ds3_set_100ft (lmc_softc_t * const, int);
static int lmc_ds3_get_link_status (lmc_softc_t * const);
static void lmc_ds3_set_crc_length (lmc_softc_t * const, int);
static void lmc_ds3_set_scram (lmc_softc_t * const, int);
static void lmc_ds3_watchdog (lmc_softc_t * const);
static void lmc_hssi_init (lmc_softc_t * const);
static void lmc_hssi_default (lmc_softc_t * const);
static void lmc_hssi_set_status (lmc_softc_t * const, lmc_ctl_t *);
static void lmc_hssi_set_clock (lmc_softc_t * const, int);
static int lmc_hssi_get_link_status (lmc_softc_t * const);
static void lmc_hssi_set_link_status (lmc_softc_t * const, int);
static void lmc_hssi_set_crc_length (lmc_softc_t * const, int);
static void lmc_hssi_watchdog (lmc_softc_t * const);
static void lmc_ssi_init (lmc_softc_t * const);
static void lmc_ssi_default (lmc_softc_t * const);
static void lmc_ssi_set_status (lmc_softc_t * const, lmc_ctl_t *);
static void lmc_ssi_set_clock (lmc_softc_t * const, int);
static void lmc_ssi_set_speed (lmc_softc_t * const, lmc_ctl_t *);
static int lmc_ssi_get_link_status (lmc_softc_t * const);
static void lmc_ssi_set_link_status (lmc_softc_t * const, int);
static void lmc_ssi_set_crc_length (lmc_softc_t * const, int);
static void lmc_ssi_watchdog (lmc_softc_t * const);
static void lmc_t1_init (lmc_softc_t * const);
static void lmc_t1_default (lmc_softc_t * const);
static void lmc_t1_set_status (lmc_softc_t * const, lmc_ctl_t *);
static int lmc_t1_get_link_status (lmc_softc_t * const);
static void lmc_t1_set_circuit_type (lmc_softc_t * const, int);
static void lmc_t1_set_crc_length (lmc_softc_t * const, int);
static void lmc_t1_set_clock (lmc_softc_t * const, int);
static void lmc_t1_watchdog (lmc_softc_t * const);
static void lmc_dummy_set_1 (lmc_softc_t * const, int);
static void lmc_dummy_set2_1 (lmc_softc_t * const, lmc_ctl_t *);
static inline void write_av9110_bit (lmc_softc_t *, int);
static void write_av9110(lmc_softc_t *, u32, u32, u32, u32, u32);
lmc_media_t lmc_ds3_media = {
.init = lmc_ds3_init, /* special media init stuff */
.defaults = lmc_ds3_default, /* reset to default state */
.set_status = lmc_ds3_set_status, /* reset status to state provided */
.set_clock_source = lmc_dummy_set_1, /* set clock source */
.set_speed = lmc_dummy_set2_1, /* set line speed */
.set_cable_length = lmc_ds3_set_100ft, /* set cable length */
.set_scrambler = lmc_ds3_set_scram, /* set scrambler */
.get_link_status = lmc_ds3_get_link_status, /* get link status */
.set_link_status = lmc_dummy_set_1, /* set link status */
.set_crc_length = lmc_ds3_set_crc_length, /* set CRC length */
.set_circuit_type = lmc_dummy_set_1, /* set T1 or E1 circuit type */
.watchdog = lmc_ds3_watchdog
};
lmc_media_t lmc_hssi_media = {
.init = lmc_hssi_init, /* special media init stuff */
.defaults = lmc_hssi_default, /* reset to default state */
.set_status = lmc_hssi_set_status, /* reset status to state provided */
.set_clock_source = lmc_hssi_set_clock, /* set clock source */
.set_speed = lmc_dummy_set2_1, /* set line speed */
.set_cable_length = lmc_dummy_set_1, /* set cable length */
.set_scrambler = lmc_dummy_set_1, /* set scrambler */
.get_link_status = lmc_hssi_get_link_status, /* get link status */
.set_link_status = lmc_hssi_set_link_status, /* set link status */
.set_crc_length = lmc_hssi_set_crc_length, /* set CRC length */
.set_circuit_type = lmc_dummy_set_1, /* set T1 or E1 circuit type */
.watchdog = lmc_hssi_watchdog
};
lmc_media_t lmc_ssi_media = {
.init = lmc_ssi_init, /* special media init stuff */
.defaults = lmc_ssi_default, /* reset to default state */
.set_status = lmc_ssi_set_status, /* reset status to state provided */
.set_clock_source = lmc_ssi_set_clock, /* set clock source */
.set_speed = lmc_ssi_set_speed, /* set line speed */
.set_cable_length = lmc_dummy_set_1, /* set cable length */
.set_scrambler = lmc_dummy_set_1, /* set scrambler */
.get_link_status = lmc_ssi_get_link_status, /* get link status */
.set_link_status = lmc_ssi_set_link_status, /* set link status */
.set_crc_length = lmc_ssi_set_crc_length, /* set CRC length */
.set_circuit_type = lmc_dummy_set_1, /* set T1 or E1 circuit type */
.watchdog = lmc_ssi_watchdog
};
lmc_media_t lmc_t1_media = {
.init = lmc_t1_init, /* special media init stuff */
.defaults = lmc_t1_default, /* reset to default state */
.set_status = lmc_t1_set_status, /* reset status to state provided */
.set_clock_source = lmc_t1_set_clock, /* set clock source */
.set_speed = lmc_dummy_set2_1, /* set line speed */
.set_cable_length = lmc_dummy_set_1, /* set cable length */
.set_scrambler = lmc_dummy_set_1, /* set scrambler */
.get_link_status = lmc_t1_get_link_status, /* get link status */
.set_link_status = lmc_dummy_set_1, /* set link status */
.set_crc_length = lmc_t1_set_crc_length, /* set CRC length */
.set_circuit_type = lmc_t1_set_circuit_type, /* set T1 or E1 circuit type */
.watchdog = lmc_t1_watchdog
};
static void
lmc_dummy_set_1 (lmc_softc_t * const sc, int a)
{
}
static void
lmc_dummy_set2_1 (lmc_softc_t * const sc, lmc_ctl_t * a)
{
}
/*
* HSSI methods
*/
static void
lmc_hssi_init (lmc_softc_t * const sc)
{
sc->ictl.cardtype = LMC_CTL_CARDTYPE_LMC5200;
lmc_gpio_mkoutput (sc, LMC_GEP_HSSI_CLOCK);
}
static void
lmc_hssi_default (lmc_softc_t * const sc)
{
sc->lmc_miireg16 = LMC_MII16_LED_ALL;
sc->lmc_media->set_link_status (sc, LMC_LINK_DOWN);
sc->lmc_media->set_clock_source (sc, LMC_CTL_CLOCK_SOURCE_EXT);
sc->lmc_media->set_crc_length (sc, LMC_CTL_CRC_LENGTH_16);
}
/*
* Given a user provided state, set ourselves up to match it. This will
* always reset the card if needed.
*/
static void
lmc_hssi_set_status (lmc_softc_t * const sc, lmc_ctl_t * ctl)
{
if (ctl == NULL)
{
sc->lmc_media->set_clock_source (sc, sc->ictl.clock_source);
lmc_set_protocol (sc, NULL);
return;
}
/*
* check for change in clock source
*/
if (ctl->clock_source && !sc->ictl.clock_source)
{
sc->lmc_media->set_clock_source (sc, LMC_CTL_CLOCK_SOURCE_INT);
sc->lmc_timing = LMC_CTL_CLOCK_SOURCE_INT;
}
else if (!ctl->clock_source && sc->ictl.clock_source)
{
sc->lmc_timing = LMC_CTL_CLOCK_SOURCE_EXT;
sc->lmc_media->set_clock_source (sc, LMC_CTL_CLOCK_SOURCE_EXT);
}
lmc_set_protocol (sc, ctl);
}
/*
* 1 == internal, 0 == external
*/
static void
lmc_hssi_set_clock (lmc_softc_t * const sc, int ie)
{
int old;
old = sc->ictl.clock_source;
if (ie == LMC_CTL_CLOCK_SOURCE_EXT)
{
sc->lmc_gpio |= LMC_GEP_HSSI_CLOCK;
LMC_CSR_WRITE (sc, csr_gp, sc->lmc_gpio);
sc->ictl.clock_source = LMC_CTL_CLOCK_SOURCE_EXT;
if(old != ie)
printk (LMC_PRINTF_FMT ": clock external\n", LMC_PRINTF_ARGS);
}
else
{
sc->lmc_gpio &= ~(LMC_GEP_HSSI_CLOCK);
LMC_CSR_WRITE (sc, csr_gp, sc->lmc_gpio);
sc->ictl.clock_source = LMC_CTL_CLOCK_SOURCE_INT;
if(old != ie)
printk (LMC_PRINTF_FMT ": clock internal\n", LMC_PRINTF_ARGS);
}
}
/*
* return hardware link status.
* 0 == link is down, 1 == link is up.
*/
static int
lmc_hssi_get_link_status (lmc_softc_t * const sc)
{
/*
* We're using the same code as SSI since
* they're practically the same
*/
return lmc_ssi_get_link_status(sc);
}
static void
lmc_hssi_set_link_status (lmc_softc_t * const sc, int state)
{
if (state == LMC_LINK_UP)
sc->lmc_miireg16 |= LMC_MII16_HSSI_TA;
else
sc->lmc_miireg16 &= ~LMC_MII16_HSSI_TA;
lmc_mii_writereg (sc, 0, 16, sc->lmc_miireg16);
}
/*
* 0 == 16bit, 1 == 32bit
*/
static void
lmc_hssi_set_crc_length (lmc_softc_t * const sc, int state)
{
if (state == LMC_CTL_CRC_LENGTH_32)
{
/* 32 bit */
sc->lmc_miireg16 |= LMC_MII16_HSSI_CRC;
sc->ictl.crc_length = LMC_CTL_CRC_LENGTH_32;
}
else
{
/* 16 bit */
sc->lmc_miireg16 &= ~LMC_MII16_HSSI_CRC;
sc->ictl.crc_length = LMC_CTL_CRC_LENGTH_16;
}
lmc_mii_writereg (sc, 0, 16, sc->lmc_miireg16);
}
static void
lmc_hssi_watchdog (lmc_softc_t * const sc)
{
/* HSSI is blank */
}
/*
* DS3 methods
*/
/*
* Set cable length
*/
static void
lmc_ds3_set_100ft (lmc_softc_t * const sc, int ie)
{
if (ie == LMC_CTL_CABLE_LENGTH_GT_100FT)
{
sc->lmc_miireg16 &= ~LMC_MII16_DS3_ZERO;
sc->ictl.cable_length = LMC_CTL_CABLE_LENGTH_GT_100FT;
}
else if (ie == LMC_CTL_CABLE_LENGTH_LT_100FT)
{
sc->lmc_miireg16 |= LMC_MII16_DS3_ZERO;
sc->ictl.cable_length = LMC_CTL_CABLE_LENGTH_LT_100FT;
}
lmc_mii_writereg (sc, 0, 16, sc->lmc_miireg16);
}
static void
lmc_ds3_default (lmc_softc_t * const sc)
{
sc->lmc_miireg16 = LMC_MII16_LED_ALL;
sc->lmc_media->set_link_status (sc, LMC_LINK_DOWN);
sc->lmc_media->set_cable_length (sc, LMC_CTL_CABLE_LENGTH_LT_100FT);
sc->lmc_media->set_scrambler (sc, LMC_CTL_OFF);
sc->lmc_media->set_crc_length (sc, LMC_CTL_CRC_LENGTH_16);
}
/*
* Given a user provided state, set ourselves up to match it. This will
* always reset the card if needed.
*/
static void
lmc_ds3_set_status (lmc_softc_t * const sc, lmc_ctl_t * ctl)
{
if (ctl == NULL)
{
sc->lmc_media->set_cable_length (sc, sc->ictl.cable_length);
sc->lmc_media->set_scrambler (sc, sc->ictl.scrambler_onoff);
lmc_set_protocol (sc, NULL);
return;
}
/*
* check for change in cable length setting
*/
if (ctl->cable_length && !sc->ictl.cable_length)
lmc_ds3_set_100ft (sc, LMC_CTL_CABLE_LENGTH_GT_100FT);
else if (!ctl->cable_length && sc->ictl.cable_length)
lmc_ds3_set_100ft (sc, LMC_CTL_CABLE_LENGTH_LT_100FT);
/*
* Check for change in scrambler setting (requires reset)
*/
if (ctl->scrambler_onoff && !sc->ictl.scrambler_onoff)
lmc_ds3_set_scram (sc, LMC_CTL_ON);
else if (!ctl->scrambler_onoff && sc->ictl.scrambler_onoff)
lmc_ds3_set_scram (sc, LMC_CTL_OFF);
lmc_set_protocol (sc, ctl);
}
static void
lmc_ds3_init (lmc_softc_t * const sc)
{
int i;
sc->ictl.cardtype = LMC_CTL_CARDTYPE_LMC5245;
/* writes zeros everywhere */
for (i = 0; i < 21; i++)
{
lmc_mii_writereg (sc, 0, 17, i);
lmc_mii_writereg (sc, 0, 18, 0);
}
/* set some essential bits */
lmc_mii_writereg (sc, 0, 17, 1);
lmc_mii_writereg (sc, 0, 18, 0x25); /* ser, xtx */
lmc_mii_writereg (sc, 0, 17, 5);
lmc_mii_writereg (sc, 0, 18, 0x80); /* emode */
lmc_mii_writereg (sc, 0, 17, 14);
lmc_mii_writereg (sc, 0, 18, 0x30); /* rcgen, tcgen */
/* clear counters and latched bits */
for (i = 0; i < 21; i++)
{
lmc_mii_writereg (sc, 0, 17, i);
lmc_mii_readreg (sc, 0, 18);
}
}
/*
* 1 == DS3 payload scrambled, 0 == not scrambled
*/
static void
lmc_ds3_set_scram (lmc_softc_t * const sc, int ie)
{
if (ie == LMC_CTL_ON)
{
sc->lmc_miireg16 |= LMC_MII16_DS3_SCRAM;
sc->ictl.scrambler_onoff = LMC_CTL_ON;
}
else
{
sc->lmc_miireg16 &= ~LMC_MII16_DS3_SCRAM;
sc->ictl.scrambler_onoff = LMC_CTL_OFF;
}
lmc_mii_writereg (sc, 0, 16, sc->lmc_miireg16);
}
/*
* return hardware link status.
* 0 == link is down, 1 == link is up.
*/
static int
lmc_ds3_get_link_status (lmc_softc_t * const sc)
{
u16 link_status, link_status_11;
int ret = 1;
lmc_mii_writereg (sc, 0, 17, 7);
link_status = lmc_mii_readreg (sc, 0, 18);
/* LMC5245 (DS3) & LMC1200 (DS1) LED definitions
* led0 yellow = far-end adapter is in Red alarm condition
* led1 blue = received an Alarm Indication signal
* (upstream failure)
* led2 Green = power to adapter, Gate Array loaded & driver
* attached
* led3 red = Loss of Signal (LOS) or out of frame (OOF)
* conditions detected on T3 receive signal
*/
lmc_led_on(sc, LMC_DS3_LED2);
if ((link_status & LMC_FRAMER_REG0_DLOS) ||
(link_status & LMC_FRAMER_REG0_OOFS)){
ret = 0;
if(sc->last_led_err[3] != 1){
u16 r1;
lmc_mii_writereg (sc, 0, 17, 01); /* Turn on Xbit error as our cisco does */
r1 = lmc_mii_readreg (sc, 0, 18);
r1 &= 0xfe;
lmc_mii_writereg(sc, 0, 18, r1);
printk(KERN_WARNING "%s: Red Alarm - Loss of Signal or Loss of Framing\n", sc->name);
}
lmc_led_on(sc, LMC_DS3_LED3); /* turn on red LED */
sc->last_led_err[3] = 1;
}
else {
lmc_led_off(sc, LMC_DS3_LED3); /* turn on red LED */
if(sc->last_led_err[3] == 1){
u16 r1;
lmc_mii_writereg (sc, 0, 17, 01); /* Turn off Xbit error */
r1 = lmc_mii_readreg (sc, 0, 18);
r1 |= 0x01;
lmc_mii_writereg(sc, 0, 18, r1);
}
sc->last_led_err[3] = 0;
}
lmc_mii_writereg(sc, 0, 17, 0x10);
link_status_11 = lmc_mii_readreg(sc, 0, 18);
if((link_status & LMC_FRAMER_REG0_AIS) ||
(link_status_11 & LMC_FRAMER_REG10_XBIT)) {
ret = 0;
if(sc->last_led_err[0] != 1){
printk(KERN_WARNING "%s: AIS Alarm or XBit Error\n", sc->name);
printk(KERN_WARNING "%s: Remote end has loss of signal or framing\n", sc->name);
}
lmc_led_on(sc, LMC_DS3_LED0);
sc->last_led_err[0] = 1;
}
else {
lmc_led_off(sc, LMC_DS3_LED0);
sc->last_led_err[0] = 0;
}
lmc_mii_writereg (sc, 0, 17, 9);
link_status = lmc_mii_readreg (sc, 0, 18);
if(link_status & LMC_FRAMER_REG9_RBLUE){
ret = 0;
if(sc->last_led_err[1] != 1){
printk(KERN_WARNING "%s: Blue Alarm - Receiving all 1's\n", sc->name);
}
lmc_led_on(sc, LMC_DS3_LED1);
sc->last_led_err[1] = 1;
}
else {
lmc_led_off(sc, LMC_DS3_LED1);
sc->last_led_err[1] = 0;
}
return ret;
}
/*
* 0 == 16bit, 1 == 32bit
*/
static void
lmc_ds3_set_crc_length (lmc_softc_t * const sc, int state)
{
if (state == LMC_CTL_CRC_LENGTH_32)
{
/* 32 bit */
sc->lmc_miireg16 |= LMC_MII16_DS3_CRC;
sc->ictl.crc_length = LMC_CTL_CRC_LENGTH_32;
}
else
{
/* 16 bit */
sc->lmc_miireg16 &= ~LMC_MII16_DS3_CRC;
sc->ictl.crc_length = LMC_CTL_CRC_LENGTH_16;
}
lmc_mii_writereg (sc, 0, 16, sc->lmc_miireg16);
}
static void
lmc_ds3_watchdog (lmc_softc_t * const sc)
{
}
/*
* SSI methods
*/
static void lmc_ssi_init(lmc_softc_t * const sc)
{
u16 mii17;
int cable;
sc->ictl.cardtype = LMC_CTL_CARDTYPE_LMC1000;
mii17 = lmc_mii_readreg(sc, 0, 17);
cable = (mii17 & LMC_MII17_SSI_CABLE_MASK) >> LMC_MII17_SSI_CABLE_SHIFT;
sc->ictl.cable_type = cable;
lmc_gpio_mkoutput(sc, LMC_GEP_SSI_TXCLOCK);
}
static void
lmc_ssi_default (lmc_softc_t * const sc)
{
sc->lmc_miireg16 = LMC_MII16_LED_ALL;
/*
* make TXCLOCK always be an output
*/
lmc_gpio_mkoutput (sc, LMC_GEP_SSI_TXCLOCK);
sc->lmc_media->set_link_status (sc, LMC_LINK_DOWN);
sc->lmc_media->set_clock_source (sc, LMC_CTL_CLOCK_SOURCE_EXT);
sc->lmc_media->set_speed (sc, NULL);
sc->lmc_media->set_crc_length (sc, LMC_CTL_CRC_LENGTH_16);
}
/*
* Given a user provided state, set ourselves up to match it. This will
* always reset the card if needed.
*/
static void
lmc_ssi_set_status (lmc_softc_t * const sc, lmc_ctl_t * ctl)
{
if (ctl == NULL)
{
sc->lmc_media->set_clock_source (sc, sc->ictl.clock_source);
sc->lmc_media->set_speed (sc, &sc->ictl);
lmc_set_protocol (sc, NULL);
return;
}
/*
* check for change in clock source
*/
if (ctl->clock_source == LMC_CTL_CLOCK_SOURCE_INT
&& sc->ictl.clock_source == LMC_CTL_CLOCK_SOURCE_EXT)
{
sc->lmc_media->set_clock_source (sc, LMC_CTL_CLOCK_SOURCE_INT);
sc->lmc_timing = LMC_CTL_CLOCK_SOURCE_INT;
}
else if (ctl->clock_source == LMC_CTL_CLOCK_SOURCE_EXT
&& sc->ictl.clock_source == LMC_CTL_CLOCK_SOURCE_INT)
{
sc->lmc_media->set_clock_source (sc, LMC_CTL_CLOCK_SOURCE_EXT);
sc->lmc_timing = LMC_CTL_CLOCK_SOURCE_EXT;
}
if (ctl->clock_rate != sc->ictl.clock_rate)
sc->lmc_media->set_speed (sc, ctl);
lmc_set_protocol (sc, ctl);
}
/*
* 1 == internal, 0 == external
*/
static void
lmc_ssi_set_clock (lmc_softc_t * const sc, int ie)
{
int old;
old = ie;
if (ie == LMC_CTL_CLOCK_SOURCE_EXT)
{
sc->lmc_gpio &= ~(LMC_GEP_SSI_TXCLOCK);
LMC_CSR_WRITE (sc, csr_gp, sc->lmc_gpio);
sc->ictl.clock_source = LMC_CTL_CLOCK_SOURCE_EXT;
if(ie != old)
printk (LMC_PRINTF_FMT ": clock external\n", LMC_PRINTF_ARGS);
}
else
{
sc->lmc_gpio |= LMC_GEP_SSI_TXCLOCK;
LMC_CSR_WRITE (sc, csr_gp, sc->lmc_gpio);
sc->ictl.clock_source = LMC_CTL_CLOCK_SOURCE_INT;
if(ie != old)
printk (LMC_PRINTF_FMT ": clock internal\n", LMC_PRINTF_ARGS);
}
}
static void
lmc_ssi_set_speed (lmc_softc_t * const sc, lmc_ctl_t * ctl)
{
lmc_ctl_t *ictl = &sc->ictl;
lmc_av9110_t *av;
/* original settings for clock rate of:
* 100 Khz (8,25,0,0,2) were incorrect
* they should have been 80,125,1,3,3
* There are 17 param combinations to produce this freq.
* For 1.5 Mhz use 120,100,1,1,2 (226 param. combinations)
*/
if (ctl == NULL)
{
av = &ictl->cardspec.ssi;
ictl->clock_rate = 1500000;
av->f = ictl->clock_rate;
av->n = 120;
av->m = 100;
av->v = 1;
av->x = 1;
av->r = 2;
write_av9110 (sc, av->n, av->m, av->v, av->x, av->r);
return;
}
av = &ctl->cardspec.ssi;
if (av->f == 0)
return;
ictl->clock_rate = av->f; /* really, this is the rate we are */
ictl->cardspec.ssi = *av;
write_av9110 (sc, av->n, av->m, av->v, av->x, av->r);
}
/*
* return hardware link status.
* 0 == link is down, 1 == link is up.
*/
static int
lmc_ssi_get_link_status (lmc_softc_t * const sc)
{
u16 link_status;
u32 ticks;
int ret = 1;
int hw_hdsk = 1;
/*
* missing CTS? Hmm. If we require CTS on, we may never get the
* link to come up, so omit it in this test.
*
* Also, it seems that with a loopback cable, DCD isn't asserted,
* so just check for things like this:
* DSR _must_ be asserted.
* One of DCD or CTS must be asserted.
*/
/* LMC 1000 (SSI) LED definitions
* led0 Green = power to adapter, Gate Array loaded &
* driver attached
* led1 Green = DSR and DTR and RTS and CTS are set
* led2 Green = Cable detected
* led3 red = No timing is available from the
* cable or the on-board frequency
* generator.
*/
link_status = lmc_mii_readreg (sc, 0, 16);
/* Is the transmit clock still available */
ticks = LMC_CSR_READ (sc, csr_gp_timer);
ticks = 0x0000ffff - (ticks & 0x0000ffff);
lmc_led_on (sc, LMC_MII16_LED0);
/* ====== transmit clock determination ===== */
if (sc->lmc_timing == LMC_CTL_CLOCK_SOURCE_INT) {
lmc_led_off(sc, LMC_MII16_LED3);
}
else if (ticks == 0 ) { /* no clock found ? */
ret = 0;
if (sc->last_led_err[3] != 1) {
sc->extra_stats.tx_lossOfClockCnt++;
printk(KERN_WARNING "%s: Lost Clock, Link Down\n", sc->name);
}
sc->last_led_err[3] = 1;
lmc_led_on (sc, LMC_MII16_LED3); /* turn ON red LED */
}
else {
if(sc->last_led_err[3] == 1)
printk(KERN_WARNING "%s: Clock Returned\n", sc->name);
sc->last_led_err[3] = 0;
lmc_led_off (sc, LMC_MII16_LED3); /* turn OFF red LED */
}
if ((link_status & LMC_MII16_SSI_DSR) == 0) { /* Also HSSI CA */
ret = 0;
hw_hdsk = 0;
}
#ifdef CONFIG_LMC_IGNORE_HARDWARE_HANDSHAKE
if ((link_status & (LMC_MII16_SSI_CTS | LMC_MII16_SSI_DCD)) == 0){
ret = 0;
hw_hdsk = 0;
}
#endif
if(hw_hdsk == 0){
if(sc->last_led_err[1] != 1)
printk(KERN_WARNING "%s: DSR not asserted\n", sc->name);
sc->last_led_err[1] = 1;
lmc_led_off(sc, LMC_MII16_LED1);
}
else {
if(sc->last_led_err[1] != 0)
printk(KERN_WARNING "%s: DSR now asserted\n", sc->name);
sc->last_led_err[1] = 0;
lmc_led_on(sc, LMC_MII16_LED1);
}
if(ret == 1) {
lmc_led_on(sc, LMC_MII16_LED2); /* Over all good status? */
}
return ret;
}
static void
lmc_ssi_set_link_status (lmc_softc_t * const sc, int state)
{
if (state == LMC_LINK_UP)
{
sc->lmc_miireg16 |= (LMC_MII16_SSI_DTR | LMC_MII16_SSI_RTS);
printk (LMC_PRINTF_FMT ": asserting DTR and RTS\n", LMC_PRINTF_ARGS);
}
else
{
sc->lmc_miireg16 &= ~(LMC_MII16_SSI_DTR | LMC_MII16_SSI_RTS);
printk (LMC_PRINTF_FMT ": deasserting DTR and RTS\n", LMC_PRINTF_ARGS);
}
lmc_mii_writereg (sc, 0, 16, sc->lmc_miireg16);
}
/*
* 0 == 16bit, 1 == 32bit
*/
static void
lmc_ssi_set_crc_length (lmc_softc_t * const sc, int state)
{
if (state == LMC_CTL_CRC_LENGTH_32)
{
/* 32 bit */
sc->lmc_miireg16 |= LMC_MII16_SSI_CRC;
sc->ictl.crc_length = LMC_CTL_CRC_LENGTH_32;
sc->lmc_crcSize = LMC_CTL_CRC_BYTESIZE_4;
}
else
{
/* 16 bit */
sc->lmc_miireg16 &= ~LMC_MII16_SSI_CRC;
sc->ictl.crc_length = LMC_CTL_CRC_LENGTH_16;
sc->lmc_crcSize = LMC_CTL_CRC_BYTESIZE_2;
}
lmc_mii_writereg (sc, 0, 16, sc->lmc_miireg16);
}
/*
* These are bits to program the ssi frequency generator
*/
static inline void
write_av9110_bit (lmc_softc_t * sc, int c)
{
/*
* set the data bit as we need it.
*/
sc->lmc_gpio &= ~(LMC_GEP_CLK);
if (c & 0x01)
sc->lmc_gpio |= LMC_GEP_DATA;
else
sc->lmc_gpio &= ~(LMC_GEP_DATA);
LMC_CSR_WRITE (sc, csr_gp, sc->lmc_gpio);
/*
* set the clock to high
*/
sc->lmc_gpio |= LMC_GEP_CLK;
LMC_CSR_WRITE (sc, csr_gp, sc->lmc_gpio);
/*
* set the clock to low again.
*/
sc->lmc_gpio &= ~(LMC_GEP_CLK);
LMC_CSR_WRITE (sc, csr_gp, sc->lmc_gpio);
}
static void write_av9110(lmc_softc_t *sc, u32 n, u32 m, u32 v, u32 x, u32 r)
{
int i;
#if 0
printk (LMC_PRINTF_FMT ": speed %u, %d %d %d %d %d\n",
LMC_PRINTF_ARGS, sc->ictl.clock_rate, n, m, v, x, r);
#endif
sc->lmc_gpio |= LMC_GEP_SSI_GENERATOR;
sc->lmc_gpio &= ~(LMC_GEP_DATA | LMC_GEP_CLK);
LMC_CSR_WRITE (sc, csr_gp, sc->lmc_gpio);
/*
* Set the TXCLOCK, GENERATOR, SERIAL, and SERIALCLK
* as outputs.
*/
lmc_gpio_mkoutput (sc, (LMC_GEP_DATA | LMC_GEP_CLK
| LMC_GEP_SSI_GENERATOR));
sc->lmc_gpio &= ~(LMC_GEP_SSI_GENERATOR);
LMC_CSR_WRITE (sc, csr_gp, sc->lmc_gpio);
/*
* a shifting we will go...
*/
for (i = 0; i < 7; i++)
write_av9110_bit (sc, n >> i);
for (i = 0; i < 7; i++)
write_av9110_bit (sc, m >> i);
for (i = 0; i < 1; i++)
write_av9110_bit (sc, v >> i);
for (i = 0; i < 2; i++)
write_av9110_bit (sc, x >> i);
for (i = 0; i < 2; i++)
write_av9110_bit (sc, r >> i);
for (i = 0; i < 5; i++)
write_av9110_bit (sc, 0x17 >> i);
/*
* stop driving serial-related signals
*/
lmc_gpio_mkinput (sc,
(LMC_GEP_DATA | LMC_GEP_CLK
| LMC_GEP_SSI_GENERATOR));
}
static void lmc_ssi_watchdog(lmc_softc_t * const sc)
{
u16 mii17 = lmc_mii_readreg(sc, 0, 17);
if (((mii17 >> 3) & 7) == 7)
lmc_led_off(sc, LMC_MII16_LED2);
else
lmc_led_on(sc, LMC_MII16_LED2);
}
/*
* T1 methods
*/
/*
* The framer regs are multiplexed through MII regs 17 & 18
* write the register address to MII reg 17 and the * data to MII reg 18. */
static void
lmc_t1_write (lmc_softc_t * const sc, int a, int d)
{
lmc_mii_writereg (sc, 0, 17, a);
lmc_mii_writereg (sc, 0, 18, d);
}
/* Save a warning
static int
lmc_t1_read (lmc_softc_t * const sc, int a)
{
lmc_mii_writereg (sc, 0, 17, a);
return lmc_mii_readreg (sc, 0, 18);
}
*/
static void
lmc_t1_init (lmc_softc_t * const sc)
{
u16 mii16;
int i;
sc->ictl.cardtype = LMC_CTL_CARDTYPE_LMC1200;
mii16 = lmc_mii_readreg (sc, 0, 16);
/* reset 8370 */
mii16 &= ~LMC_MII16_T1_RST;
lmc_mii_writereg (sc, 0, 16, mii16 | LMC_MII16_T1_RST);
lmc_mii_writereg (sc, 0, 16, mii16);
/* set T1 or E1 line. Uses sc->lmcmii16 reg in function so update it */
sc->lmc_miireg16 = mii16;
lmc_t1_set_circuit_type(sc, LMC_CTL_CIRCUIT_TYPE_T1);
mii16 = sc->lmc_miireg16;
lmc_t1_write (sc, 0x01, 0x1B); /* CR0 - primary control */
lmc_t1_write (sc, 0x02, 0x42); /* JAT_CR - jitter atten config */
lmc_t1_write (sc, 0x14, 0x00); /* LOOP - loopback config */
lmc_t1_write (sc, 0x15, 0x00); /* DL3_TS - external data link timeslot */
lmc_t1_write (sc, 0x18, 0xFF); /* PIO - programmable I/O */
lmc_t1_write (sc, 0x19, 0x30); /* POE - programmable OE */
lmc_t1_write (sc, 0x1A, 0x0F); /* CMUX - clock input mux */
lmc_t1_write (sc, 0x20, 0x41); /* LIU_CR - RX LIU config */
lmc_t1_write (sc, 0x22, 0x76); /* RLIU_CR - RX LIU config */
lmc_t1_write (sc, 0x40, 0x03); /* RCR0 - RX config */
lmc_t1_write (sc, 0x45, 0x00); /* RALM - RX alarm config */
lmc_t1_write (sc, 0x46, 0x05); /* LATCH - RX alarm/err/cntr latch */
lmc_t1_write (sc, 0x68, 0x40); /* TLIU_CR - TX LIU config */
lmc_t1_write (sc, 0x70, 0x0D); /* TCR0 - TX framer config */
lmc_t1_write (sc, 0x71, 0x05); /* TCR1 - TX config */
lmc_t1_write (sc, 0x72, 0x0B); /* TFRM - TX frame format */
lmc_t1_write (sc, 0x73, 0x00); /* TERROR - TX error insert */
lmc_t1_write (sc, 0x74, 0x00); /* TMAN - TX manual Sa/FEBE config */
lmc_t1_write (sc, 0x75, 0x00); /* TALM - TX alarm signal config */
lmc_t1_write (sc, 0x76, 0x00); /* TPATT - TX test pattern config */
lmc_t1_write (sc, 0x77, 0x00); /* TLB - TX inband loopback config */
lmc_t1_write (sc, 0x90, 0x05); /* CLAD_CR - clock rate adapter config */
lmc_t1_write (sc, 0x91, 0x05); /* CSEL - clad freq sel */
lmc_t1_write (sc, 0xA6, 0x00); /* DL1_CTL - DL1 control */
lmc_t1_write (sc, 0xB1, 0x00); /* DL2_CTL - DL2 control */
lmc_t1_write (sc, 0xD0, 0x47); /* SBI_CR - sys bus iface config */
lmc_t1_write (sc, 0xD1, 0x70); /* RSB_CR - RX sys bus config */
lmc_t1_write (sc, 0xD4, 0x30); /* TSB_CR - TX sys bus config */
for (i = 0; i < 32; i++)
{
lmc_t1_write (sc, 0x0E0 + i, 0x00); /* SBCn - sys bus per-channel ctl */
lmc_t1_write (sc, 0x100 + i, 0x00); /* TPCn - TX per-channel ctl */
lmc_t1_write (sc, 0x180 + i, 0x00); /* RPCn - RX per-channel ctl */
}
for (i = 1; i < 25; i++)
{
lmc_t1_write (sc, 0x0E0 + i, 0x0D); /* SBCn - sys bus per-channel ctl */
}
mii16 |= LMC_MII16_T1_XOE;
lmc_mii_writereg (sc, 0, 16, mii16);
sc->lmc_miireg16 = mii16;
}
static void
lmc_t1_default (lmc_softc_t * const sc)
{
sc->lmc_miireg16 = LMC_MII16_LED_ALL;
sc->lmc_media->set_link_status (sc, LMC_LINK_DOWN);
sc->lmc_media->set_circuit_type (sc, LMC_CTL_CIRCUIT_TYPE_T1);
sc->lmc_media->set_crc_length (sc, LMC_CTL_CRC_LENGTH_16);
/* Right now we can only clock from out internal source */
sc->ictl.clock_source = LMC_CTL_CLOCK_SOURCE_INT;
}
/* * Given a user provided state, set ourselves up to match it. This will * always reset the card if needed.
*/
static void
lmc_t1_set_status (lmc_softc_t * const sc, lmc_ctl_t * ctl)
{
if (ctl == NULL)
{
sc->lmc_media->set_circuit_type (sc, sc->ictl.circuit_type);
lmc_set_protocol (sc, NULL);
return;