forked from torvalds/linux
-
Notifications
You must be signed in to change notification settings - Fork 1
/
Copy pathopl3.c
1258 lines (1010 loc) · 27.1 KB
/
opl3.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
/*
* sound/oss/opl3.c
*
* A low level driver for Yamaha YM3812 and OPL-3 -chips
*
*
* Copyright (C) by Hannu Savolainen 1993-1997
*
* OSS/Free for Linux is distributed under the GNU GENERAL PUBLIC LICENSE (GPL)
* Version 2 (June 1991). See the "COPYING" file distributed with this software
* for more info.
*
*
* Changes
* Thomas Sailer ioctl code reworked (vmalloc/vfree removed)
* Alan Cox modularisation, fixed sound_mem allocs.
* Christoph Hellwig Adapted to module_init/module_exit
* Arnaldo C. de Melo get rid of check_region, use request_region for
* OPL4, release it on exit, some cleanups.
*
* Status
* Believed to work. Badly needs rewriting a bit to support multiple
* OPL3 devices.
*/
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/delay.h>
/*
* Major improvements to the FM handling 30AUG92 by Rob Hooft,
*/
#include "sound_config.h"
#include "opl3_hw.h"
#define MAX_VOICE 18
#define OFFS_4OP 11
struct voice_info
{
unsigned char keyon_byte;
long bender;
long bender_range;
unsigned long orig_freq;
unsigned long current_freq;
int volume;
int mode;
int panning; /* 0xffff means not set */
};
typedef struct opl_devinfo
{
int base;
int left_io, right_io;
int nr_voice;
int lv_map[MAX_VOICE];
struct voice_info voc[MAX_VOICE];
struct voice_alloc_info *v_alloc;
struct channel_info *chn_info;
struct sbi_instrument i_map[SBFM_MAXINSTR];
struct sbi_instrument *act_i[MAX_VOICE];
struct synth_info fm_info;
int busy;
int model;
unsigned char cmask;
int is_opl4;
} opl_devinfo;
static struct opl_devinfo *devc = NULL;
static int detected_model;
static int store_instr(int instr_no, struct sbi_instrument *instr);
static void freq_to_fnum(int freq, int *block, int *fnum);
static void opl3_command(int io_addr, unsigned int addr, unsigned int val);
static int opl3_kill_note(int dev, int voice, int note, int velocity);
static void enter_4op_mode(void)
{
int i;
static int v4op[MAX_VOICE] = {
0, 1, 2, 9, 10, 11, 6, 7, 8, 15, 16, 17
};
devc->cmask = 0x3f; /* Connect all possible 4 OP voice operators */
opl3_command(devc->right_io, CONNECTION_SELECT_REGISTER, 0x3f);
for (i = 0; i < 3; i++)
pv_map[i].voice_mode = 4;
for (i = 3; i < 6; i++)
pv_map[i].voice_mode = 0;
for (i = 9; i < 12; i++)
pv_map[i].voice_mode = 4;
for (i = 12; i < 15; i++)
pv_map[i].voice_mode = 0;
for (i = 0; i < 12; i++)
devc->lv_map[i] = v4op[i];
devc->v_alloc->max_voice = devc->nr_voice = 12;
}
static int opl3_ioctl(int dev, unsigned int cmd, void __user * arg)
{
struct sbi_instrument ins;
switch (cmd) {
case SNDCTL_FM_LOAD_INSTR:
printk(KERN_WARNING "Warning: Obsolete ioctl(SNDCTL_FM_LOAD_INSTR) used. Fix the program.\n");
if (copy_from_user(&ins, arg, sizeof(ins)))
return -EFAULT;
if (ins.channel < 0 || ins.channel >= SBFM_MAXINSTR) {
printk(KERN_WARNING "FM Error: Invalid instrument number %d\n", ins.channel);
return -EINVAL;
}
return store_instr(ins.channel, &ins);
case SNDCTL_SYNTH_INFO:
devc->fm_info.nr_voices = (devc->nr_voice == 12) ? 6 : devc->nr_voice;
if (copy_to_user(arg, &devc->fm_info, sizeof(devc->fm_info)))
return -EFAULT;
return 0;
case SNDCTL_SYNTH_MEMAVL:
return 0x7fffffff;
case SNDCTL_FM_4OP_ENABLE:
if (devc->model == 2)
enter_4op_mode();
return 0;
default:
return -EINVAL;
}
}
static int opl3_detect(int ioaddr)
{
/*
* This function returns 1 if the FM chip is present at the given I/O port
* The detection algorithm plays with the timer built in the FM chip and
* looks for a change in the status register.
*
* Note! The timers of the FM chip are not connected to AdLib (and compatible)
* boards.
*
* Note2! The chip is initialized if detected.
*/
unsigned char stat1, signature;
int i;
if (devc != NULL)
{
printk(KERN_ERR "opl3: Only one OPL3 supported.\n");
return 0;
}
devc = kzalloc(sizeof(*devc), GFP_KERNEL);
if (devc == NULL)
{
printk(KERN_ERR "opl3: Can't allocate memory for the device control "
"structure \n ");
return 0;
}
strcpy(devc->fm_info.name, "OPL2");
if (!request_region(ioaddr, 4, devc->fm_info.name)) {
printk(KERN_WARNING "opl3: I/O port 0x%x already in use\n", ioaddr);
goto cleanup_devc;
}
devc->base = ioaddr;
/* Reset timers 1 and 2 */
opl3_command(ioaddr, TIMER_CONTROL_REGISTER, TIMER1_MASK | TIMER2_MASK);
/* Reset the IRQ of the FM chip */
opl3_command(ioaddr, TIMER_CONTROL_REGISTER, IRQ_RESET);
signature = stat1 = inb(ioaddr); /* Status register */
if (signature != 0x00 && signature != 0x06 && signature != 0x02 &&
signature != 0x0f)
{
MDB(printk(KERN_INFO "OPL3 not detected %x\n", signature));
goto cleanup_region;
}
if (signature == 0x06) /* OPL2 */
{
detected_model = 2;
}
else if (signature == 0x00 || signature == 0x0f) /* OPL3 or OPL4 */
{
unsigned char tmp;
detected_model = 3;
/*
* Detect availability of OPL4 (_experimental_). Works probably
* only after a cold boot. In addition the OPL4 port
* of the chip may not be connected to the PC bus at all.
*/
opl3_command(ioaddr + 2, OPL3_MODE_REGISTER, 0x00);
opl3_command(ioaddr + 2, OPL3_MODE_REGISTER, OPL3_ENABLE | OPL4_ENABLE);
if ((tmp = inb(ioaddr)) == 0x02) /* Have a OPL4 */
{
detected_model = 4;
}
if (request_region(ioaddr - 8, 2, "OPL4")) /* OPL4 port was free */
{
int tmp;
outb((0x02), ioaddr - 8); /* Select OPL4 ID register */
udelay(10);
tmp = inb(ioaddr - 7); /* Read it */
udelay(10);
if (tmp == 0x20) /* OPL4 should return 0x20 here */
{
detected_model = 4;
outb((0xF8), ioaddr - 8); /* Select OPL4 FM mixer control */
udelay(10);
outb((0x1B), ioaddr - 7); /* Write value */
udelay(10);
}
else
{ /* release OPL4 port */
release_region(ioaddr - 8, 2);
detected_model = 3;
}
}
opl3_command(ioaddr + 2, OPL3_MODE_REGISTER, 0);
}
for (i = 0; i < 9; i++)
opl3_command(ioaddr, KEYON_BLOCK + i, 0); /*
* Note off
*/
opl3_command(ioaddr, TEST_REGISTER, ENABLE_WAVE_SELECT);
opl3_command(ioaddr, PERCOSSION_REGISTER, 0x00); /*
* Melodic mode.
*/
return 1;
cleanup_region:
release_region(ioaddr, 4);
cleanup_devc:
kfree(devc);
devc = NULL;
return 0;
}
static int opl3_kill_note (int devno, int voice, int note, int velocity)
{
struct physical_voice_info *map;
if (voice < 0 || voice >= devc->nr_voice)
return 0;
devc->v_alloc->map[voice] = 0;
map = &pv_map[devc->lv_map[voice]];
DEB(printk("Kill note %d\n", voice));
if (map->voice_mode == 0)
return 0;
opl3_command(map->ioaddr, KEYON_BLOCK + map->voice_num, devc->voc[voice].keyon_byte & ~0x20);
devc->voc[voice].keyon_byte = 0;
devc->voc[voice].bender = 0;
devc->voc[voice].volume = 64;
devc->voc[voice].panning = 0xffff; /* Not set */
devc->voc[voice].bender_range = 200;
devc->voc[voice].orig_freq = 0;
devc->voc[voice].current_freq = 0;
devc->voc[voice].mode = 0;
return 0;
}
#define HIHAT 0
#define CYMBAL 1
#define TOMTOM 2
#define SNARE 3
#define BDRUM 4
#define UNDEFINED TOMTOM
#define DEFAULT TOMTOM
static int store_instr(int instr_no, struct sbi_instrument *instr)
{
if (instr->key != FM_PATCH && (instr->key != OPL3_PATCH || devc->model != 2))
printk(KERN_WARNING "FM warning: Invalid patch format field (key) 0x%x\n", instr->key);
memcpy((char *) &(devc->i_map[instr_no]), (char *) instr, sizeof(*instr));
return 0;
}
static int opl3_set_instr (int dev, int voice, int instr_no)
{
if (voice < 0 || voice >= devc->nr_voice)
return 0;
if (instr_no < 0 || instr_no >= SBFM_MAXINSTR)
instr_no = 0; /* Acoustic piano (usually) */
devc->act_i[voice] = &devc->i_map[instr_no];
return 0;
}
/*
* The next table looks magical, but it certainly is not. Its values have
* been calculated as table[i]=8*log(i/64)/log(2) with an obvious exception
* for i=0. This log-table converts a linear volume-scaling (0..127) to a
* logarithmic scaling as present in the FM-synthesizer chips. so : Volume
* 64 = 0 db = relative volume 0 and: Volume 32 = -6 db = relative
* volume -8 it was implemented as a table because it is only 128 bytes and
* it saves a lot of log() calculations. (RH)
*/
static char fm_volume_table[128] =
{
-64, -48, -40, -35, -32, -29, -27, -26,
-24, -23, -21, -20, -19, -18, -18, -17,
-16, -15, -15, -14, -13, -13, -12, -12,
-11, -11, -10, -10, -10, -9, -9, -8,
-8, -8, -7, -7, -7, -6, -6, -6,
-5, -5, -5, -5, -4, -4, -4, -4,
-3, -3, -3, -3, -2, -2, -2, -2,
-2, -1, -1, -1, -1, 0, 0, 0,
0, 0, 0, 1, 1, 1, 1, 1,
1, 2, 2, 2, 2, 2, 2, 2,
3, 3, 3, 3, 3, 3, 3, 4,
4, 4, 4, 4, 4, 4, 4, 5,
5, 5, 5, 5, 5, 5, 5, 5,
6, 6, 6, 6, 6, 6, 6, 6,
6, 7, 7, 7, 7, 7, 7, 7,
7, 7, 7, 8, 8, 8, 8, 8
};
static void calc_vol(unsigned char *regbyte, int volume, int main_vol)
{
int level = (~*regbyte & 0x3f);
if (main_vol > 127)
main_vol = 127;
volume = (volume * main_vol) / 127;
if (level)
level += fm_volume_table[volume];
if (level > 0x3f)
level = 0x3f;
if (level < 0)
level = 0;
*regbyte = (*regbyte & 0xc0) | (~level & 0x3f);
}
static void set_voice_volume(int voice, int volume, int main_vol)
{
unsigned char vol1, vol2, vol3, vol4;
struct sbi_instrument *instr;
struct physical_voice_info *map;
if (voice < 0 || voice >= devc->nr_voice)
return;
map = &pv_map[devc->lv_map[voice]];
instr = devc->act_i[voice];
if (!instr)
instr = &devc->i_map[0];
if (instr->channel < 0)
return;
if (devc->voc[voice].mode == 0)
return;
if (devc->voc[voice].mode == 2)
{
vol1 = instr->operators[2];
vol2 = instr->operators[3];
if ((instr->operators[10] & 0x01))
{
calc_vol(&vol1, volume, main_vol);
calc_vol(&vol2, volume, main_vol);
}
else
{
calc_vol(&vol2, volume, main_vol);
}
opl3_command(map->ioaddr, KSL_LEVEL + map->op[0], vol1);
opl3_command(map->ioaddr, KSL_LEVEL + map->op[1], vol2);
}
else
{ /*
* 4 OP voice
*/
int connection;
vol1 = instr->operators[2];
vol2 = instr->operators[3];
vol3 = instr->operators[OFFS_4OP + 2];
vol4 = instr->operators[OFFS_4OP + 3];
/*
* The connection method for 4 OP devc->voc is defined by the rightmost
* bits at the offsets 10 and 10+OFFS_4OP
*/
connection = ((instr->operators[10] & 0x01) << 1) | (instr->operators[10 + OFFS_4OP] & 0x01);
switch (connection)
{
case 0:
calc_vol(&vol4, volume, main_vol);
break;
case 1:
calc_vol(&vol2, volume, main_vol);
calc_vol(&vol4, volume, main_vol);
break;
case 2:
calc_vol(&vol1, volume, main_vol);
calc_vol(&vol4, volume, main_vol);
break;
case 3:
calc_vol(&vol1, volume, main_vol);
calc_vol(&vol3, volume, main_vol);
calc_vol(&vol4, volume, main_vol);
break;
default:
;
}
opl3_command(map->ioaddr, KSL_LEVEL + map->op[0], vol1);
opl3_command(map->ioaddr, KSL_LEVEL + map->op[1], vol2);
opl3_command(map->ioaddr, KSL_LEVEL + map->op[2], vol3);
opl3_command(map->ioaddr, KSL_LEVEL + map->op[3], vol4);
}
}
static int opl3_start_note (int dev, int voice, int note, int volume)
{
unsigned char data, fpc;
int block, fnum, freq, voice_mode, pan;
struct sbi_instrument *instr;
struct physical_voice_info *map;
if (voice < 0 || voice >= devc->nr_voice)
return 0;
map = &pv_map[devc->lv_map[voice]];
pan = devc->voc[voice].panning;
if (map->voice_mode == 0)
return 0;
if (note == 255) /*
* Just change the volume
*/
{
set_voice_volume(voice, volume, devc->voc[voice].volume);
return 0;
}
/*
* Kill previous note before playing
*/
opl3_command(map->ioaddr, KSL_LEVEL + map->op[1], 0xff); /*
* Carrier
* volume to
* min
*/
opl3_command(map->ioaddr, KSL_LEVEL + map->op[0], 0xff); /*
* Modulator
* volume to
*/
if (map->voice_mode == 4)
{
opl3_command(map->ioaddr, KSL_LEVEL + map->op[2], 0xff);
opl3_command(map->ioaddr, KSL_LEVEL + map->op[3], 0xff);
}
opl3_command(map->ioaddr, KEYON_BLOCK + map->voice_num, 0x00); /*
* Note
* off
*/
instr = devc->act_i[voice];
if (!instr)
instr = &devc->i_map[0];
if (instr->channel < 0)
{
printk(KERN_WARNING "opl3: Initializing voice %d with undefined instrument\n", voice);
return 0;
}
if (map->voice_mode == 2 && instr->key == OPL3_PATCH)
return 0; /*
* Cannot play
*/
voice_mode = map->voice_mode;
if (voice_mode == 4)
{
int voice_shift;
voice_shift = (map->ioaddr == devc->left_io) ? 0 : 3;
voice_shift += map->voice_num;
if (instr->key != OPL3_PATCH) /*
* Just 2 OP patch
*/
{
voice_mode = 2;
devc->cmask &= ~(1 << voice_shift);
}
else
{
devc->cmask |= (1 << voice_shift);
}
opl3_command(devc->right_io, CONNECTION_SELECT_REGISTER, devc->cmask);
}
/*
* Set Sound Characteristics
*/
opl3_command(map->ioaddr, AM_VIB + map->op[0], instr->operators[0]);
opl3_command(map->ioaddr, AM_VIB + map->op[1], instr->operators[1]);
/*
* Set Attack/Decay
*/
opl3_command(map->ioaddr, ATTACK_DECAY + map->op[0], instr->operators[4]);
opl3_command(map->ioaddr, ATTACK_DECAY + map->op[1], instr->operators[5]);
/*
* Set Sustain/Release
*/
opl3_command(map->ioaddr, SUSTAIN_RELEASE + map->op[0], instr->operators[6]);
opl3_command(map->ioaddr, SUSTAIN_RELEASE + map->op[1], instr->operators[7]);
/*
* Set Wave Select
*/
opl3_command(map->ioaddr, WAVE_SELECT + map->op[0], instr->operators[8]);
opl3_command(map->ioaddr, WAVE_SELECT + map->op[1], instr->operators[9]);
/*
* Set Feedback/Connection
*/
fpc = instr->operators[10];
if (pan != 0xffff)
{
fpc &= ~STEREO_BITS;
if (pan < -64)
fpc |= VOICE_TO_LEFT;
else
if (pan > 64)
fpc |= VOICE_TO_RIGHT;
else
fpc |= (VOICE_TO_LEFT | VOICE_TO_RIGHT);
}
if (!(fpc & 0x30))
fpc |= 0x30; /*
* Ensure that at least one chn is enabled
*/
opl3_command(map->ioaddr, FEEDBACK_CONNECTION + map->voice_num, fpc);
/*
* If the voice is a 4 OP one, initialize the operators 3 and 4 also
*/
if (voice_mode == 4)
{
/*
* Set Sound Characteristics
*/
opl3_command(map->ioaddr, AM_VIB + map->op[2], instr->operators[OFFS_4OP + 0]);
opl3_command(map->ioaddr, AM_VIB + map->op[3], instr->operators[OFFS_4OP + 1]);
/*
* Set Attack/Decay
*/
opl3_command(map->ioaddr, ATTACK_DECAY + map->op[2], instr->operators[OFFS_4OP + 4]);
opl3_command(map->ioaddr, ATTACK_DECAY + map->op[3], instr->operators[OFFS_4OP + 5]);
/*
* Set Sustain/Release
*/
opl3_command(map->ioaddr, SUSTAIN_RELEASE + map->op[2], instr->operators[OFFS_4OP + 6]);
opl3_command(map->ioaddr, SUSTAIN_RELEASE + map->op[3], instr->operators[OFFS_4OP + 7]);
/*
* Set Wave Select
*/
opl3_command(map->ioaddr, WAVE_SELECT + map->op[2], instr->operators[OFFS_4OP + 8]);
opl3_command(map->ioaddr, WAVE_SELECT + map->op[3], instr->operators[OFFS_4OP + 9]);
/*
* Set Feedback/Connection
*/
fpc = instr->operators[OFFS_4OP + 10];
if (!(fpc & 0x30))
fpc |= 0x30; /*
* Ensure that at least one chn is enabled
*/
opl3_command(map->ioaddr, FEEDBACK_CONNECTION + map->voice_num + 3, fpc);
}
devc->voc[voice].mode = voice_mode;
set_voice_volume(voice, volume, devc->voc[voice].volume);
freq = devc->voc[voice].orig_freq = note_to_freq(note) / 1000;
/*
* Since the pitch bender may have been set before playing the note, we
* have to calculate the bending now.
*/
freq = compute_finetune(devc->voc[voice].orig_freq, devc->voc[voice].bender, devc->voc[voice].bender_range, 0);
devc->voc[voice].current_freq = freq;
freq_to_fnum(freq, &block, &fnum);
/*
* Play note
*/
data = fnum & 0xff; /*
* Least significant bits of fnumber
*/
opl3_command(map->ioaddr, FNUM_LOW + map->voice_num, data);
data = 0x20 | ((block & 0x7) << 2) | ((fnum >> 8) & 0x3);
devc->voc[voice].keyon_byte = data;
opl3_command(map->ioaddr, KEYON_BLOCK + map->voice_num, data);
if (voice_mode == 4)
opl3_command(map->ioaddr, KEYON_BLOCK + map->voice_num + 3, data);
return 0;
}
static void freq_to_fnum (int freq, int *block, int *fnum)
{
int f, octave;
/*
* Converts the note frequency to block and fnum values for the FM chip
*/
/*
* First try to compute the block -value (octave) where the note belongs
*/
f = freq;
octave = 5;
if (f == 0)
octave = 0;
else if (f < 261)
{
while (f < 261)
{
octave--;
f <<= 1;
}
}
else if (f > 493)
{
while (f > 493)
{
octave++;
f >>= 1;
}
}
if (octave > 7)
octave = 7;
*fnum = freq * (1 << (20 - octave)) / 49716;
*block = octave;
}
static void opl3_command (int io_addr, unsigned int addr, unsigned int val)
{
int i;
/*
* The original 2-OP synth requires a quite long delay after writing to a
* register. The OPL-3 survives with just two INBs
*/
outb(((unsigned char) (addr & 0xff)), io_addr);
if (devc->model != 2)
udelay(10);
else
for (i = 0; i < 2; i++)
inb(io_addr);
outb(((unsigned char) (val & 0xff)), io_addr + 1);
if (devc->model != 2)
udelay(30);
else
for (i = 0; i < 2; i++)
inb(io_addr);
}
static void opl3_reset(int devno)
{
int i;
for (i = 0; i < 18; i++)
devc->lv_map[i] = i;
for (i = 0; i < devc->nr_voice; i++)
{
opl3_command(pv_map[devc->lv_map[i]].ioaddr,
KSL_LEVEL + pv_map[devc->lv_map[i]].op[0], 0xff);
opl3_command(pv_map[devc->lv_map[i]].ioaddr,
KSL_LEVEL + pv_map[devc->lv_map[i]].op[1], 0xff);
if (pv_map[devc->lv_map[i]].voice_mode == 4)
{
opl3_command(pv_map[devc->lv_map[i]].ioaddr,
KSL_LEVEL + pv_map[devc->lv_map[i]].op[2], 0xff);
opl3_command(pv_map[devc->lv_map[i]].ioaddr,
KSL_LEVEL + pv_map[devc->lv_map[i]].op[3], 0xff);
}
opl3_kill_note(devno, i, 0, 64);
}
if (devc->model == 2)
{
devc->v_alloc->max_voice = devc->nr_voice = 18;
for (i = 0; i < 18; i++)
pv_map[i].voice_mode = 2;
}
}
static int opl3_open(int dev, int mode)
{
int i;
if (devc->busy)
return -EBUSY;
devc->busy = 1;
devc->v_alloc->max_voice = devc->nr_voice = (devc->model == 2) ? 18 : 9;
devc->v_alloc->timestamp = 0;
for (i = 0; i < 18; i++)
{
devc->v_alloc->map[i] = 0;
devc->v_alloc->alloc_times[i] = 0;
}
devc->cmask = 0x00; /*
* Just 2 OP mode
*/
if (devc->model == 2)
opl3_command(devc->right_io, CONNECTION_SELECT_REGISTER, devc->cmask);
return 0;
}
static void opl3_close(int dev)
{
devc->busy = 0;
devc->v_alloc->max_voice = devc->nr_voice = (devc->model == 2) ? 18 : 9;
devc->fm_info.nr_drums = 0;
devc->fm_info.perc_mode = 0;
opl3_reset(dev);
}
static void opl3_hw_control(int dev, unsigned char *event)
{
}
static int opl3_load_patch(int dev, int format, const char __user *addr,
int count, int pmgr_flag)
{
struct sbi_instrument ins;
if (count <sizeof(ins))
{
printk(KERN_WARNING "FM Error: Patch record too short\n");
return -EINVAL;
}
if (copy_from_user(&ins, addr, sizeof(ins)))
return -EFAULT;
if (ins.channel < 0 || ins.channel >= SBFM_MAXINSTR)
{
printk(KERN_WARNING "FM Error: Invalid instrument number %d\n", ins.channel);
return -EINVAL;
}
ins.key = format;
return store_instr(ins.channel, &ins);
}
static void opl3_panning(int dev, int voice, int value)
{
if (voice < 0 || voice >= devc->nr_voice)
return;
devc->voc[voice].panning = value;
}
static void opl3_volume_method(int dev, int mode)
{
}
#define SET_VIBRATO(cell) { \
tmp = instr->operators[(cell-1)+(((cell-1)/2)*OFFS_4OP)]; \
if (pressure > 110) \
tmp |= 0x40; /* Vibrato on */ \
opl3_command (map->ioaddr, AM_VIB + map->op[cell-1], tmp);}
static void opl3_aftertouch(int dev, int voice, int pressure)
{
int tmp;
struct sbi_instrument *instr;
struct physical_voice_info *map;
if (voice < 0 || voice >= devc->nr_voice)
return;
map = &pv_map[devc->lv_map[voice]];
DEB(printk("Aftertouch %d\n", voice));
if (map->voice_mode == 0)
return;
/*
* Adjust the amount of vibrato depending the pressure
*/
instr = devc->act_i[voice];
if (!instr)
instr = &devc->i_map[0];
if (devc->voc[voice].mode == 4)
{
int connection = ((instr->operators[10] & 0x01) << 1) | (instr->operators[10 + OFFS_4OP] & 0x01);
switch (connection)
{
case 0:
SET_VIBRATO(4);
break;
case 1:
SET_VIBRATO(2);
SET_VIBRATO(4);
break;
case 2:
SET_VIBRATO(1);
SET_VIBRATO(4);
break;
case 3:
SET_VIBRATO(1);
SET_VIBRATO(3);
SET_VIBRATO(4);
break;
}
/*
* Not implemented yet
*/
}
else
{
SET_VIBRATO(1);
if ((instr->operators[10] & 0x01)) /*
* Additive synthesis
*/
SET_VIBRATO(2);
}
}
#undef SET_VIBRATO
static void bend_pitch(int dev, int voice, int value)
{
unsigned char data;
int block, fnum, freq;
struct physical_voice_info *map;
map = &pv_map[devc->lv_map[voice]];
if (map->voice_mode == 0)
return;
devc->voc[voice].bender = value;
if (!value)
return;
if (!(devc->voc[voice].keyon_byte & 0x20))
return; /*
* Not keyed on
*/
freq = compute_finetune(devc->voc[voice].orig_freq, devc->voc[voice].bender, devc->voc[voice].bender_range, 0);
devc->voc[voice].current_freq = freq;
freq_to_fnum(freq, &block, &fnum);
data = fnum & 0xff; /*
* Least significant bits of fnumber
*/
opl3_command(map->ioaddr, FNUM_LOW + map->voice_num, data);
data = 0x20 | ((block & 0x7) << 2) | ((fnum >> 8) & 0x3);
devc->voc[voice].keyon_byte = data;
opl3_command(map->ioaddr, KEYON_BLOCK + map->voice_num, data);
}
static void opl3_controller (int dev, int voice, int ctrl_num, int value)
{
if (voice < 0 || voice >= devc->nr_voice)
return;
switch (ctrl_num)
{
case CTRL_PITCH_BENDER:
bend_pitch(dev, voice, value);
break;
case CTRL_PITCH_BENDER_RANGE:
devc->voc[voice].bender_range = value;
break;
case CTL_MAIN_VOLUME:
devc->voc[voice].volume = value / 128;
break;
case CTL_PAN:
devc->voc[voice].panning = (value * 2) - 128;
break;
}
}
static void opl3_bender(int dev, int voice, int value)
{
if (voice < 0 || voice >= devc->nr_voice)
return;
bend_pitch(dev, voice, value - 8192);
}