forked from grate-driver/linux
-
Notifications
You must be signed in to change notification settings - Fork 0
/
sb_ess.c
1822 lines (1582 loc) · 51.2 KB
/
sb_ess.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
#undef FKS_LOGGING
#undef FKS_TEST
/*
* tabs should be 4 spaces, in vi(m): set tabstop=4
*
* TODO: consistency speed calculations!!
* cleanup!
* ????: Did I break MIDI support?
*
* History:
*
* Rolf Fokkens (Dec 20 1998): ES188x recording level support on a per
* fokkensr@vertis.nl input basis.
* (Dec 24 1998): Recognition of ES1788, ES1887, ES1888,
* ES1868, ES1869 and ES1878. Could be used for
* specific handling in the future. All except
* ES1887 and ES1888 and ES688 are handled like
* ES1688.
* (Dec 27 1998): RECLEV for all (?) ES1688+ chips. ES188x now
* have the "Dec 20" support + RECLEV
* (Jan 2 1999): Preparation for Full Duplex. This means
* Audio 2 is now used for playback when dma16
* is specified. The next step would be to use
* Audio 1 and Audio 2 at the same time.
* (Jan 9 1999): Put all ESS stuff into sb_ess.[ch], this
* includes both the ESS stuff that has been in
* sb_*[ch] before I touched it and the ESS support
* I added later
* (Jan 23 1999): Full Duplex seems to work. I wrote a small
* test proggy which works OK. Haven't found
* any applications to test it though. So why did
* I bother to create it anyway?? :) Just for
* fun.
* (May 2 1999): I tried to be too smart by "introducing"
* ess_calc_best_speed (). The idea was that two
* dividers could be used to setup a samplerate,
* ess_calc_best_speed () would choose the best.
* This works for playback, but results in
* recording problems for high samplerates. I
* fixed this by removing ess_calc_best_speed ()
* and just doing what the documentation says.
* Andy Sloane (Jun 4 1999): Stole some code from ALSA to fix the playback
* andy@guildsoftware.com speed on ES1869, ES1879, ES1887, and ES1888.
* 1879's were previously ignored by this driver;
* added (untested) support for those.
* Cvetan Ivanov (Oct 27 1999): Fixed ess_dsp_init to call ess_set_dma_hw for
* zezo@inet.bg _ALL_ ESS models, not only ES1887
*
* This files contains ESS chip specifics. It's based on the existing ESS
* handling as it resided in sb_common.c, sb_mixer.c and sb_audio.c. This
* file adds features like:
* - Chip Identification (as shown in /proc/sound)
* - RECLEV support for ES1688 and later
* - 6 bits playback level support chips later than ES1688
* - Recording level support on a per-device basis for ES1887
* - Full-Duplex for ES1887
*
* Full duplex is enabled by specifying dma16. While the normal dma must
* be one of 0, 1 or 3, dma16 can be one of 0, 1, 3 or 5. DMA 5 is a 16 bit
* DMA channel, while the others are 8 bit..
*
* ESS detection isn't full proof (yet). If it fails an additional module
* parameter esstype can be specified to be one of the following:
* -1, 0, 688, 1688, 1868, 1869, 1788, 1887, 1888
* -1 means: mimic 2.0 behaviour,
* 0 means: auto detect.
* others: explicitly specify chip
* -1 is default, cause auto detect still doesn't work.
*/
/*
* About the documentation
*
* I don't know if the chips all are OK, but the documentation is buggy. 'cause
* I don't have all the cips myself, there's a lot I cannot verify. I'll try to
* keep track of my latest insights about his here. If you have additional info,
* please enlighten me (fokkensr@vertis.nl)!
*
* I had the impression that ES1688 also has 6 bit master volume control. The
* documentation about ES1888 (rev C, october '95) claims that ES1888 has
* the following features ES1688 doesn't have:
* - 6 bit master volume
* - Full Duplex
* So ES1688 apparently doesn't have 6 bit master volume control, but the
* ES1688 does have RECLEV control. Makes me wonder: does ES688 have it too?
* Without RECLEV ES688 won't be much fun I guess.
*
* From the ES1888 (rev C, october '95) documentation I got the impression
* that registers 0x68 to 0x6e don't exist which means: no recording volume
* controls. To my surprise the ES888 documentation (1/14/96) claims that
* ES888 does have these record mixer registers, but that ES1888 doesn't have
* 0x69 and 0x6b. So the rest should be there.
*
* I'm trying to get ES1887 Full Duplex. Audio 2 is playback only, while Audio 2
* is both record and playback. I think I should use Audio 2 for all playback.
*
* The documentation is an adventure: it's close but not fully accurate. I
* found out that after a reset some registers are *NOT* reset, though the
* docs say the would be. Interesting ones are 0x7f, 0x7d and 0x7a. They are
* related to the Audio 2 channel. I also was surprised about the consequences
* of writing 0x00 to 0x7f (which should be done by reset): The ES1887 moves
* into ES1888 mode. This means that it claims IRQ 11, which happens to be my
* ISDN adapter. Needless to say it no longer worked. I now understand why
* after rebooting 0x7f already was 0x05, the value of my choice: the BIOS
* did it.
*
* Oh, and this is another trap: in ES1887 docs mixer register 0x70 is
* described as if it's exactly the same as register 0xa1. This is *NOT* true.
* The description of 0x70 in ES1869 docs is accurate however.
* Well, the assumption about ES1869 was wrong: register 0x70 is very much
* like register 0xa1, except that bit 7 is always 1, whatever you want
* it to be.
*
* When using audio 2 mixer register 0x72 seems te be meaningless. Only 0xa2
* has effect.
*
* Software reset not being able to reset all registers is great! Especially
* the fact that register 0x78 isn't reset is great when you wanna change back
* to single dma operation (simplex): audio 2 is still operational, and uses
* the same dma as audio 1: your ess changes into a funny echo machine.
*
* Received the news that ES1688 is detected as a ES1788. Did some thinking:
* the ES1887 detection scheme suggests in step 2 to try if bit 3 of register
* 0x64 can be changed. This is inaccurate, first I inverted the * check: "If
* can be modified, it's a 1688", which lead to a correct detection
* of my ES1887. It resulted however in bad detection of 1688 (reported by mail)
* and 1868 (if no PnP detection first): they result in a 1788 being detected.
* I don't have docs on 1688, but I do have docs on 1868: The documentation is
* probably inaccurate in the fact that I should check bit 2, not bit 3. This
* is what I do now.
*/
/*
* About recognition of ESS chips
*
* The distinction of ES688, ES1688, ES1788, ES1887 and ES1888 is described in
* a (preliminary ??) datasheet on ES1887. Its aim is to identify ES1887, but
* during detection the text claims that "this chip may be ..." when a step
* fails. This scheme is used to distinct between the above chips.
* It appears however that some PnP chips like ES1868 are recognized as ES1788
* by the ES1887 detection scheme. These PnP chips can be detected in another
* way however: ES1868, ES1869 and ES1878 can be recognized (full proof I think)
* by repeatedly reading mixer register 0x40. This is done by ess_identify in
* sb_common.c.
* This results in the following detection steps:
* - distinct between ES688 and ES1688+ (as always done in this driver)
* if ES688 we're ready
* - try to detect ES1868, ES1869 or ES1878
* if successful we're ready
* - try to detect ES1888, ES1887 or ES1788
* if successful we're ready
* - Dunno. Must be 1688. Will do in general
*
* About RECLEV support:
*
* The existing ES1688 support didn't take care of the ES1688+ recording
* levels very well. Whenever a device was selected (recmask) for recording
* its recording level was loud, and it couldn't be changed. The fact that
* internal register 0xb4 could take care of RECLEV, didn't work meaning until
* its value was restored every time the chip was reset; this reset the
* value of 0xb4 too. I guess that's what 4front also had (have?) trouble with.
*
* About ES1887 support:
*
* The ES1887 has separate registers to control the recording levels, for all
* inputs. The ES1887 specific software makes these levels the same as their
* corresponding playback levels, unless recmask says they aren't recorded. In
* the latter case the recording volumes are 0.
* Now recording levels of inputs can be controlled, by changing the playback
* levels. Furthermore several devices can be recorded together (which is not
* possible with the ES1688).
* Besides the separate recording level control for each input, the common
* recording level can also be controlled by RECLEV as described above.
*
* Not only ES1887 have this recording mixer. I know the following from the
* documentation:
* ES688 no
* ES1688 no
* ES1868 no
* ES1869 yes
* ES1878 no
* ES1879 yes
* ES1888 no/yes Contradicting documentation; most recent: yes
* ES1946 yes This is a PCI chip; not handled by this driver
*/
#include <linux/delay.h>
#include <linux/interrupt.h>
#include <linux/spinlock.h>
#include "sound_config.h"
#include "sb_mixer.h"
#include "sb.h"
#include "sb_ess.h"
#define ESSTYPE_LIKE20 -1 /* Mimic 2.0 behaviour */
#define ESSTYPE_DETECT 0 /* Mimic 2.0 behaviour */
#define SUBMDL_ES1788 0x10 /* Subtype ES1788 for specific handling */
#define SUBMDL_ES1868 0x11 /* Subtype ES1868 for specific handling */
#define SUBMDL_ES1869 0x12 /* Subtype ES1869 for specific handling */
#define SUBMDL_ES1878 0x13 /* Subtype ES1878 for specific handling */
#define SUBMDL_ES1879 0x16 /* ES1879 was initially forgotten */
#define SUBMDL_ES1887 0x14 /* Subtype ES1887 for specific handling */
#define SUBMDL_ES1888 0x15 /* Subtype ES1888 for specific handling */
#define SB_CAP_ES18XX_RATE 0x100
#define ES1688_CLOCK1 795444 /* 128 - div */
#define ES1688_CLOCK2 397722 /* 256 - div */
#define ES18XX_CLOCK1 793800 /* 128 - div */
#define ES18XX_CLOCK2 768000 /* 256 - div */
#ifdef FKS_LOGGING
static void ess_show_mixerregs (sb_devc *devc);
#endif
static int ess_read (sb_devc * devc, unsigned char reg);
static int ess_write (sb_devc * devc, unsigned char reg, unsigned char data);
static void ess_chgmixer
(sb_devc * devc, unsigned int reg, unsigned int mask, unsigned int val);
/****************************************************************************
* *
* ESS audio *
* *
****************************************************************************/
struct ess_command {short cmd; short data;};
/*
* Commands for initializing Audio 1 for input (record)
*/
static struct ess_command ess_i08m[] = /* input 8 bit mono */
{ {0xb7, 0x51}, {0xb7, 0xd0}, {-1, 0} };
static struct ess_command ess_i16m[] = /* input 16 bit mono */
{ {0xb7, 0x71}, {0xb7, 0xf4}, {-1, 0} };
static struct ess_command ess_i08s[] = /* input 8 bit stereo */
{ {0xb7, 0x51}, {0xb7, 0x98}, {-1, 0} };
static struct ess_command ess_i16s[] = /* input 16 bit stereo */
{ {0xb7, 0x71}, {0xb7, 0xbc}, {-1, 0} };
static struct ess_command *ess_inp_cmds[] =
{ ess_i08m, ess_i16m, ess_i08s, ess_i16s };
/*
* Commands for initializing Audio 1 for output (playback)
*/
static struct ess_command ess_o08m[] = /* output 8 bit mono */
{ {0xb6, 0x80}, {0xb7, 0x51}, {0xb7, 0xd0}, {-1, 0} };
static struct ess_command ess_o16m[] = /* output 16 bit mono */
{ {0xb6, 0x00}, {0xb7, 0x71}, {0xb7, 0xf4}, {-1, 0} };
static struct ess_command ess_o08s[] = /* output 8 bit stereo */
{ {0xb6, 0x80}, {0xb7, 0x51}, {0xb7, 0x98}, {-1, 0} };
static struct ess_command ess_o16s[] = /* output 16 bit stereo */
{ {0xb6, 0x00}, {0xb7, 0x71}, {0xb7, 0xbc}, {-1, 0} };
static struct ess_command *ess_out_cmds[] =
{ ess_o08m, ess_o16m, ess_o08s, ess_o16s };
static void ess_exec_commands
(sb_devc *devc, struct ess_command *cmdtab[])
{
struct ess_command *cmd;
cmd = cmdtab [ ((devc->channels != 1) << 1) + (devc->bits != AFMT_U8) ];
while (cmd->cmd != -1) {
ess_write (devc, cmd->cmd, cmd->data);
cmd++;
}
}
static void ess_change
(sb_devc *devc, unsigned int reg, unsigned int mask, unsigned int val)
{
int value;
value = ess_read (devc, reg);
value = (value & ~mask) | (val & mask);
ess_write (devc, reg, value);
}
static void ess_set_output_parms
(int dev, unsigned long buf, int nr_bytes, int intrflag)
{
sb_devc *devc = audio_devs[dev]->devc;
if (devc->duplex) {
devc->trg_buf_16 = buf;
devc->trg_bytes_16 = nr_bytes;
devc->trg_intrflag_16 = intrflag;
devc->irq_mode_16 = IMODE_OUTPUT;
} else {
devc->trg_buf = buf;
devc->trg_bytes = nr_bytes;
devc->trg_intrflag = intrflag;
devc->irq_mode = IMODE_OUTPUT;
}
}
static void ess_set_input_parms
(int dev, unsigned long buf, int count, int intrflag)
{
sb_devc *devc = audio_devs[dev]->devc;
devc->trg_buf = buf;
devc->trg_bytes = count;
devc->trg_intrflag = intrflag;
devc->irq_mode = IMODE_INPUT;
}
static int ess_calc_div (int clock, int revert, int *speedp, int *diffp)
{
int divider;
int speed, diff;
int retval;
speed = *speedp;
divider = (clock + speed / 2) / speed;
retval = revert - divider;
if (retval > revert - 1) {
retval = revert - 1;
divider = revert - retval;
}
/* This line is suggested. Must be wrong I think
*speedp = (clock + divider / 2) / divider;
So I chose the next one */
*speedp = clock / divider;
diff = speed - *speedp;
if (diff < 0) diff =-diff;
*diffp = diff;
return retval;
}
static int ess_calc_best_speed
(int clock1, int rev1, int clock2, int rev2, int *divp, int *speedp)
{
int speed1 = *speedp, speed2 = *speedp;
int div1, div2;
int diff1, diff2;
int retval;
div1 = ess_calc_div (clock1, rev1, &speed1, &diff1);
div2 = ess_calc_div (clock2, rev2, &speed2, &diff2);
if (diff1 < diff2) {
*divp = div1;
*speedp = speed1;
retval = 1;
} else {
/* *divp = div2; */
*divp = 0x80 | div2;
*speedp = speed2;
retval = 2;
}
return retval;
}
/*
* Depending on the audiochannel ESS devices can
* have different clock settings. These are made consistent for duplex
* however.
* callers of ess_speed only do an audionum suggestion, which means
* input suggests 1, output suggests 2. This suggestion is only true
* however when doing duplex.
*/
static void ess_common_speed (sb_devc *devc, int *speedp, int *divp)
{
int diff = 0, div;
if (devc->duplex) {
/*
* The 0x80 is important for the first audio channel
*/
if (devc->submodel == SUBMDL_ES1888) {
div = 0x80 | ess_calc_div (795500, 256, speedp, &diff);
} else {
div = 0x80 | ess_calc_div (795500, 128, speedp, &diff);
}
} else if(devc->caps & SB_CAP_ES18XX_RATE) {
if (devc->submodel == SUBMDL_ES1888) {
ess_calc_best_speed(397700, 128, 795500, 256,
&div, speedp);
} else {
ess_calc_best_speed(ES18XX_CLOCK1, 128, ES18XX_CLOCK2, 256,
&div, speedp);
}
} else {
if (*speedp > 22000) {
div = 0x80 | ess_calc_div (ES1688_CLOCK1, 256, speedp, &diff);
} else {
div = 0x00 | ess_calc_div (ES1688_CLOCK2, 128, speedp, &diff);
}
}
*divp = div;
}
static void ess_speed (sb_devc *devc, int audionum)
{
int speed;
int div, div2;
ess_common_speed (devc, &(devc->speed), &div);
#ifdef FKS_REG_LOGGING
printk (KERN_INFO "FKS: ess_speed (%d) b speed = %d, div=%x\n", audionum, devc->speed, div);
#endif
/* Set filter roll-off to 90% of speed/2 */
speed = (devc->speed * 9) / 20;
div2 = 256 - 7160000 / (speed * 82);
if (!devc->duplex) audionum = 1;
if (audionum == 1) {
/* Change behaviour of register A1 *
sb_chg_mixer(devc, 0x71, 0x20, 0x20)
* For ES1869 only??? */
ess_write (devc, 0xa1, div);
ess_write (devc, 0xa2, div2);
} else {
ess_setmixer (devc, 0x70, div);
/*
* FKS: fascinating: 0x72 doesn't seem to work.
*/
ess_write (devc, 0xa2, div2);
ess_setmixer (devc, 0x72, div2);
}
}
static int ess_audio_prepare_for_input(int dev, int bsize, int bcount)
{
sb_devc *devc = audio_devs[dev]->devc;
ess_speed(devc, 1);
sb_dsp_command(devc, DSP_CMD_SPKOFF);
ess_write (devc, 0xb8, 0x0e); /* Auto init DMA mode */
ess_change (devc, 0xa8, 0x03, 3 - devc->channels); /* Mono/stereo */
ess_write (devc, 0xb9, 2); /* Demand mode (4 bytes/DMA request) */
ess_exec_commands (devc, ess_inp_cmds);
ess_change (devc, 0xb1, 0xf0, 0x50);
ess_change (devc, 0xb2, 0xf0, 0x50);
devc->trigger_bits = 0;
return 0;
}
static int ess_audio_prepare_for_output_audio1 (int dev, int bsize, int bcount)
{
sb_devc *devc = audio_devs[dev]->devc;
sb_dsp_reset(devc);
ess_speed(devc, 1);
ess_write (devc, 0xb8, 4); /* Auto init DMA mode */
ess_change (devc, 0xa8, 0x03, 3 - devc->channels); /* Mono/stereo */
ess_write (devc, 0xb9, 2); /* Demand mode (4 bytes/request) */
ess_exec_commands (devc, ess_out_cmds);
ess_change (devc, 0xb1, 0xf0, 0x50); /* Enable DMA */
ess_change (devc, 0xb2, 0xf0, 0x50); /* Enable IRQ */
sb_dsp_command(devc, DSP_CMD_SPKON); /* There be sound! */
devc->trigger_bits = 0;
return 0;
}
static int ess_audio_prepare_for_output_audio2 (int dev, int bsize, int bcount)
{
sb_devc *devc = audio_devs[dev]->devc;
unsigned char bits;
/* FKS: qqq
sb_dsp_reset(devc);
*/
/*
* Auto-Initialize:
* DMA mode + demand mode (8 bytes/request, yes I want it all!)
* But leave 16-bit DMA bit untouched!
*/
ess_chgmixer (devc, 0x78, 0xd0, 0xd0);
ess_speed(devc, 2);
/* bits 4:3 on ES1887 represent recording source. Keep them! */
bits = ess_getmixer (devc, 0x7a) & 0x18;
/* Set stereo/mono */
if (devc->channels != 1) bits |= 0x02;
/* Init DACs; UNSIGNED mode for 8 bit; SIGNED mode for 16 bit */
if (devc->bits != AFMT_U8) bits |= 0x05; /* 16 bit */
/* Enable DMA, IRQ will be shared (hopefully)*/
bits |= 0x60;
ess_setmixer (devc, 0x7a, bits);
ess_mixer_reload (devc, SOUND_MIXER_PCM); /* There be sound! */
devc->trigger_bits = 0;
return 0;
}
static int ess_audio_prepare_for_output(int dev, int bsize, int bcount)
{
sb_devc *devc = audio_devs[dev]->devc;
#ifdef FKS_REG_LOGGING
printk(KERN_INFO "ess_audio_prepare_for_output: dma_out=%d,dma_in=%d\n"
, audio_devs[dev]->dmap_out->dma, audio_devs[dev]->dmap_in->dma);
#endif
if (devc->duplex) {
return ess_audio_prepare_for_output_audio2 (dev, bsize, bcount);
} else {
return ess_audio_prepare_for_output_audio1 (dev, bsize, bcount);
}
}
static void ess_audio_halt_xfer(int dev)
{
unsigned long flags;
sb_devc *devc = audio_devs[dev]->devc;
spin_lock_irqsave(&devc->lock, flags);
sb_dsp_reset(devc);
spin_unlock_irqrestore(&devc->lock, flags);
/*
* Audio 2 may still be operational! Creates awful sounds!
*/
if (devc->duplex) ess_chgmixer(devc, 0x78, 0x03, 0x00);
}
static void ess_audio_start_input
(int dev, unsigned long buf, int nr_bytes, int intrflag)
{
int count = nr_bytes;
sb_devc *devc = audio_devs[dev]->devc;
short c = -nr_bytes;
/*
* Start a DMA input to the buffer pointed by dmaqtail
*/
if (audio_devs[dev]->dmap_in->dma > 3) count >>= 1;
count--;
devc->irq_mode = IMODE_INPUT;
ess_write (devc, 0xa4, (unsigned char) ((unsigned short) c & 0xff));
ess_write (devc, 0xa5, (unsigned char) (((unsigned short) c >> 8) & 0xff));
ess_change (devc, 0xb8, 0x0f, 0x0f); /* Go */
devc->intr_active = 1;
}
static void ess_audio_output_block_audio1
(int dev, unsigned long buf, int nr_bytes, int intrflag)
{
int count = nr_bytes;
sb_devc *devc = audio_devs[dev]->devc;
short c = -nr_bytes;
if (audio_devs[dev]->dmap_out->dma > 3)
count >>= 1;
count--;
devc->irq_mode = IMODE_OUTPUT;
ess_write (devc, 0xa4, (unsigned char) ((unsigned short) c & 0xff));
ess_write (devc, 0xa5, (unsigned char) (((unsigned short) c >> 8) & 0xff));
ess_change (devc, 0xb8, 0x05, 0x05); /* Go */
devc->intr_active = 1;
}
static void ess_audio_output_block_audio2
(int dev, unsigned long buf, int nr_bytes, int intrflag)
{
int count = nr_bytes;
sb_devc *devc = audio_devs[dev]->devc;
short c = -nr_bytes;
if (audio_devs[dev]->dmap_out->dma > 3) count >>= 1;
count--;
ess_setmixer (devc, 0x74, (unsigned char) ((unsigned short) c & 0xff));
ess_setmixer (devc, 0x76, (unsigned char) (((unsigned short) c >> 8) & 0xff));
ess_chgmixer (devc, 0x78, 0x03, 0x03); /* Go */
devc->irq_mode_16 = IMODE_OUTPUT;
devc->intr_active_16 = 1;
}
static void ess_audio_output_block
(int dev, unsigned long buf, int nr_bytes, int intrflag)
{
sb_devc *devc = audio_devs[dev]->devc;
if (devc->duplex) {
ess_audio_output_block_audio2 (dev, buf, nr_bytes, intrflag);
} else {
ess_audio_output_block_audio1 (dev, buf, nr_bytes, intrflag);
}
}
/*
* FKS: the if-statements for both bits and bits_16 are quite alike.
* Combine this...
*/
static void ess_audio_trigger(int dev, int bits)
{
sb_devc *devc = audio_devs[dev]->devc;
int bits_16 = bits & devc->irq_mode_16;
bits &= devc->irq_mode;
if (!bits && !bits_16) {
/* FKS oh oh.... wrong?? for dma 16? */
sb_dsp_command(devc, 0xd0); /* Halt DMA */
}
if (bits) {
switch (devc->irq_mode)
{
case IMODE_INPUT:
ess_audio_start_input(dev, devc->trg_buf, devc->trg_bytes,
devc->trg_intrflag);
break;
case IMODE_OUTPUT:
ess_audio_output_block(dev, devc->trg_buf, devc->trg_bytes,
devc->trg_intrflag);
break;
}
}
if (bits_16) {
switch (devc->irq_mode_16) {
case IMODE_INPUT:
ess_audio_start_input(dev, devc->trg_buf_16, devc->trg_bytes_16,
devc->trg_intrflag_16);
break;
case IMODE_OUTPUT:
ess_audio_output_block(dev, devc->trg_buf_16, devc->trg_bytes_16,
devc->trg_intrflag_16);
break;
}
}
devc->trigger_bits = bits | bits_16;
}
static int ess_audio_set_speed(int dev, int speed)
{
sb_devc *devc = audio_devs[dev]->devc;
int minspeed, maxspeed, dummydiv;
if (speed > 0) {
minspeed = (devc->duplex ? 6215 : 5000 );
maxspeed = (devc->duplex ? 44100 : 48000);
if (speed < minspeed) speed = minspeed;
if (speed > maxspeed) speed = maxspeed;
ess_common_speed (devc, &speed, &dummydiv);
devc->speed = speed;
}
return devc->speed;
}
/*
* FKS: This is a one-on-one copy of sb1_audio_set_bits
*/
static unsigned int ess_audio_set_bits(int dev, unsigned int bits)
{
sb_devc *devc = audio_devs[dev]->devc;
if (bits != 0) {
if (bits == AFMT_U8 || bits == AFMT_S16_LE) {
devc->bits = bits;
} else {
devc->bits = AFMT_U8;
}
}
return devc->bits;
}
/*
* FKS: This is a one-on-one copy of sbpro_audio_set_channels
* (*) Modified it!!
*/
static short ess_audio_set_channels(int dev, short channels)
{
sb_devc *devc = audio_devs[dev]->devc;
if (channels == 1 || channels == 2) devc->channels = channels;
return devc->channels;
}
static struct audio_driver ess_audio_driver = /* ESS ES688/1688 */
{
.owner = THIS_MODULE,
.open = sb_audio_open,
.close = sb_audio_close,
.output_block = ess_set_output_parms,
.start_input = ess_set_input_parms,
.prepare_for_input = ess_audio_prepare_for_input,
.prepare_for_output = ess_audio_prepare_for_output,
.halt_io = ess_audio_halt_xfer,
.trigger = ess_audio_trigger,
.set_speed = ess_audio_set_speed,
.set_bits = ess_audio_set_bits,
.set_channels = ess_audio_set_channels
};
/*
* ess_audio_init must be called from sb_audio_init
*/
struct audio_driver *ess_audio_init
(sb_devc *devc, int *audio_flags, int *format_mask)
{
*audio_flags = DMA_AUTOMODE;
*format_mask |= AFMT_S16_LE;
if (devc->duplex) {
int tmp_dma;
/*
* sb_audio_init thinks dma8 is for playback and
* dma16 is for record. Not now! So swap them.
*/
tmp_dma = devc->dma16;
devc->dma16 = devc->dma8;
devc->dma8 = tmp_dma;
*audio_flags |= DMA_DUPLEX;
}
return &ess_audio_driver;
}
/****************************************************************************
* *
* ESS common *
* *
****************************************************************************/
static void ess_handle_channel
(char *channel, int dev, int intr_active, unsigned char flag, int irq_mode)
{
if (!intr_active || !flag) return;
#ifdef FKS_REG_LOGGING
printk(KERN_INFO "FKS: ess_handle_channel %s irq_mode=%d\n", channel, irq_mode);
#endif
switch (irq_mode) {
case IMODE_OUTPUT:
DMAbuf_outputintr (dev, 1);
break;
case IMODE_INPUT:
DMAbuf_inputintr (dev);
break;
case IMODE_INIT:
break;
default:;
/* printk(KERN_WARNING "ESS: Unexpected interrupt\n"); */
}
}
/*
* FKS: TODO!!! Finish this!
*
* I think midi stuff uses uart401, without interrupts.
* So IMODE_MIDI isn't a value for devc->irq_mode.
*/
void ess_intr (sb_devc *devc)
{
int status;
unsigned char src;
if (devc->submodel == SUBMDL_ES1887) {
src = ess_getmixer (devc, 0x7f) >> 4;
} else {
src = 0xff;
}
#ifdef FKS_REG_LOGGING
printk(KERN_INFO "FKS: sbintr src=%x\n",(int)src);
#endif
ess_handle_channel
( "Audio 1"
, devc->dev, devc->intr_active , src & 0x01, devc->irq_mode );
ess_handle_channel
( "Audio 2"
, devc->dev, devc->intr_active_16, src & 0x02, devc->irq_mode_16);
/*
* Acknowledge interrupts
*/
if (devc->submodel == SUBMDL_ES1887 && (src & 0x02)) {
ess_chgmixer (devc, 0x7a, 0x80, 0x00);
}
if (src & 0x01) {
status = inb(DSP_DATA_AVAIL);
}
}
static void ess_extended (sb_devc * devc)
{
/* Enable extended mode */
sb_dsp_command(devc, 0xc6);
}
static int ess_write (sb_devc * devc, unsigned char reg, unsigned char data)
{
#ifdef FKS_REG_LOGGING
printk(KERN_INFO "FKS: write reg %x: %x\n", reg, data);
#endif
/* Write a byte to an extended mode register of ES1688 */
if (!sb_dsp_command(devc, reg))
return 0;
return sb_dsp_command(devc, data);
}
static int ess_read (sb_devc * devc, unsigned char reg)
{
/* Read a byte from an extended mode register of ES1688 */
/* Read register command */
if (!sb_dsp_command(devc, 0xc0)) return -1;
if (!sb_dsp_command(devc, reg )) return -1;
return sb_dsp_get_byte(devc);
}
int ess_dsp_reset(sb_devc * devc)
{
int loopc;
#ifdef FKS_REG_LOGGING
printk(KERN_INFO "FKS: ess_dsp_reset 1\n");
ess_show_mixerregs (devc);
#endif
outb(3, DSP_RESET); /* Reset FIFO too */
udelay(10);
outb(0, DSP_RESET);
udelay(30);
for (loopc = 0; loopc < 1000 && !(inb(DSP_DATA_AVAIL) & 0x80); loopc++);
if (inb(DSP_READ) != 0xAA) {
DDB(printk("sb: No response to RESET\n"));
return 0; /* Sorry */
}
ess_extended (devc);
#ifdef FKS_LOGGING
printk(KERN_INFO "FKS: dsp_reset 2\n");
ess_show_mixerregs (devc);
#endif
return 1;
}
static int ess_irq_bits (int irq)
{
switch (irq) {
case 2:
case 9:
return 0;
case 5:
return 1;
case 7:
return 2;
case 10:
return 3;
default:
printk(KERN_ERR "ESS1688: Invalid IRQ %d\n", irq);
return -1;
}
}
/*
* Set IRQ configuration register for all ESS models
*/
static int ess_common_set_irq_hw (sb_devc * devc)
{
int irq_bits;
if ((irq_bits = ess_irq_bits (devc->irq)) == -1) return 0;
if (!ess_write (devc, 0xb1, 0x50 | (irq_bits << 2))) {
printk(KERN_ERR "ES1688: Failed to write to IRQ config register\n");
return 0;
}
return 1;
}
/*
* I wanna use modern ES1887 mixer irq handling. Funny is the
* fact that my BIOS wants the same. But suppose someone's BIOS
* doesn't do this!
* This is independent of duplex. If there's a 1887 this will
* prevent it from going into 1888 mode.
*/
static void ess_es1887_set_irq_hw (sb_devc * devc)
{
int irq_bits;
if ((irq_bits = ess_irq_bits (devc->irq)) == -1) return;
ess_chgmixer (devc, 0x7f, 0x0f, 0x01 | ((irq_bits + 1) << 1));
}
static int ess_set_irq_hw (sb_devc * devc)
{
if (devc->submodel == SUBMDL_ES1887) ess_es1887_set_irq_hw (devc);
return ess_common_set_irq_hw (devc);
}
#ifdef FKS_TEST
/*
* FKS_test:
* for ES1887: 00, 18, non wr bits: 0001 1000
* for ES1868: 00, b8, non wr bits: 1011 1000
* for ES1888: 00, f8, non wr bits: 1111 1000
* for ES1688: 00, f8, non wr bits: 1111 1000
* + ES968
*/
static void FKS_test (sb_devc * devc)
{
int val1, val2;
val1 = ess_getmixer (devc, 0x64);
ess_setmixer (devc, 0x64, ~val1);
val2 = ess_getmixer (devc, 0x64) ^ ~val1;
ess_setmixer (devc, 0x64, val1);
val1 ^= ess_getmixer (devc, 0x64);
printk (KERN_INFO "FKS: FKS_test %02x, %02x\n", (val1 & 0x0ff), (val2 & 0x0ff));
};
#endif
static unsigned int ess_identify (sb_devc * devc)
{
unsigned int val;
unsigned long flags;
spin_lock_irqsave(&devc->lock, flags);
outb(((unsigned char) (0x40 & 0xff)), MIXER_ADDR);
udelay(20);
val = inb(MIXER_DATA) << 8;
udelay(20);
val |= inb(MIXER_DATA);
udelay(20);
spin_unlock_irqrestore(&devc->lock, flags);
return val;
}
/*
* ESS technology describes a detection scheme in their docs. It involves
* fiddling with the bits in certain mixer registers. ess_probe is supposed
* to help.
*
* FKS: tracing shows ess_probe writes wrong value to 0x64. Bit 3 reads 1, but
* should be written 0 only. Check this.
*/
static int ess_probe (sb_devc * devc, int reg, int xorval)