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arm64: dts: uniphier: use clock/reset controllers
[linux-2.6/btrfs-unstable.git] / sound / oss / sequencer.c
blobf19da4b47c1dfcd89c5da0bb03f14d55811c532c
1 /*
2 * sound/oss/sequencer.c
3 *
4 * The sequencer personality manager.
5 */
6 /*
7 * Copyright (C) by Hannu Savolainen 1993-1997
8 *
9 * OSS/Free for Linux is distributed under the GNU GENERAL PUBLIC LICENSE (GPL)
10 * Version 2 (June 1991). See the "COPYING" file distributed with this software
11 * for more info.
12 */
13 /*
14 * Thomas Sailer : ioctl code reworked (vmalloc/vfree removed)
15 * Alan Cox : reformatted and fixed a pair of null pointer bugs
16 */
17 #include <linux/kmod.h>
18 #include <linux/spinlock.h>
19 #include "sound_config.h"
20
21 #include "midi_ctrl.h"
22 #include "sleep.h"
23
24 static int sequencer_ok;
25 static struct sound_timer_operations *tmr;
26 static int tmr_no = -1; /* Currently selected timer */
27 static int pending_timer = -1; /* For timer change operation */
28 extern unsigned long seq_time;
29
30 static int obsolete_api_used;
31 static DEFINE_SPINLOCK(lock);
32
33 /*
34 * Local counts for number of synth and MIDI devices. These are initialized
35 * by the sequencer_open.
36 */
37 static int max_mididev;
38 static int max_synthdev;
39
40 /*
41 * The seq_mode gives the operating mode of the sequencer:
42 * 1 = level1 (the default)
43 * 2 = level2 (extended capabilities)
44 */
45
46 #define SEQ_1 1
47 #define SEQ_2 2
48 static int seq_mode = SEQ_1;
49
50 static DECLARE_WAIT_QUEUE_HEAD(seq_sleeper);
51 static DECLARE_WAIT_QUEUE_HEAD(midi_sleeper);
52
53 static int midi_opened[MAX_MIDI_DEV];
54
55 static int midi_written[MAX_MIDI_DEV];
56
57 static unsigned long prev_input_time;
58 static int prev_event_time;
59
60 #include "tuning.h"
61
62 #define EV_SZ 8
63 #define IEV_SZ 8
64
65 static unsigned char *queue;
66 static unsigned char *iqueue;
67
68 static volatile int qhead, qtail, qlen;
69 static volatile int iqhead, iqtail, iqlen;
70 static volatile int seq_playing;
71 static volatile int sequencer_busy;
72 static int output_threshold;
73 static long pre_event_timeout;
74 static unsigned synth_open_mask;
75
76 static int seq_queue(unsigned char *note, char nonblock);
77 static void seq_startplay(void);
78 static int seq_sync(void);
79 static void seq_reset(void);
80
81 #if MAX_SYNTH_DEV > 15
82 #error Too many synthesizer devices enabled.
83 #endif
84
85 int sequencer_read(int dev, struct file *file, char __user *buf, int count)
86 {
87 int c = count, p = 0;
88 int ev_len;
89 unsigned long flags;
90
91 dev = dev >> 4;
92
93 ev_len = seq_mode == SEQ_1 ? 4 : 8;
94
95 spin_lock_irqsave(&lock,flags);
96
97 if (!iqlen)
98 {
99 spin_unlock_irqrestore(&lock,flags);
100 if (file->f_flags & O_NONBLOCK) {
101 return -EAGAIN;
102 }
103
104 oss_broken_sleep_on(&midi_sleeper, pre_event_timeout);
105 spin_lock_irqsave(&lock,flags);
106 if (!iqlen)
107 {
108 spin_unlock_irqrestore(&lock,flags);
109 return 0;
110 }
111 }
112 while (iqlen && c >= ev_len)
113 {
114 char *fixit = (char *) &iqueue[iqhead * IEV_SZ];
115 spin_unlock_irqrestore(&lock,flags);
116 if (copy_to_user(&(buf)[p], fixit, ev_len))
117 return count - c;
118 p += ev_len;
119 c -= ev_len;
120
121 spin_lock_irqsave(&lock,flags);
122 iqhead = (iqhead + 1) % SEQ_MAX_QUEUE;
123 iqlen--;
124 }
125 spin_unlock_irqrestore(&lock,flags);
126 return count - c;
127 }
128
129 static void sequencer_midi_output(int dev)
130 {
131 /*
132 * Currently NOP
133 */
134 }
135
136 void seq_copy_to_input(unsigned char *event_rec, int len)
137 {
138 unsigned long flags;
139
140 /*
141 * Verify that the len is valid for the current mode.
142 */
143
144 if (len != 4 && len != 8)
145 return;
146 if ((seq_mode == SEQ_1) != (len == 4))
147 return;
148
149 if (iqlen >= (SEQ_MAX_QUEUE - 1))
150 return; /* Overflow */
151
152 spin_lock_irqsave(&lock,flags);
153 memcpy(&iqueue[iqtail * IEV_SZ], event_rec, len);
154 iqlen++;
155 iqtail = (iqtail + 1) % SEQ_MAX_QUEUE;
156 wake_up(&midi_sleeper);
157 spin_unlock_irqrestore(&lock,flags);
158 }
159 EXPORT_SYMBOL(seq_copy_to_input);
160
161 static void sequencer_midi_input(int dev, unsigned char data)
162 {
163 unsigned int tstamp;
164 unsigned char event_rec[4];
165
166 if (data == 0xfe) /* Ignore active sensing */
167 return;
168
169 tstamp = jiffies - seq_time;
170
171 if (tstamp != prev_input_time)
172 {
173 tstamp = (tstamp << 8) | SEQ_WAIT;
174 seq_copy_to_input((unsigned char *) &tstamp, 4);
175 prev_input_time = tstamp;
176 }
177 event_rec[0] = SEQ_MIDIPUTC;
178 event_rec[1] = data;
179 event_rec[2] = dev;
180 event_rec[3] = 0;
181
182 seq_copy_to_input(event_rec, 4);
183 }
184
185 void seq_input_event(unsigned char *event_rec, int len)
186 {
187 unsigned long this_time;
188
189 if (seq_mode == SEQ_2)
190 this_time = tmr->get_time(tmr_no);
191 else
192 this_time = jiffies - seq_time;
193
194 if (this_time != prev_input_time)
195 {
196 unsigned char tmp_event[8];
197
198 tmp_event[0] = EV_TIMING;
199 tmp_event[1] = TMR_WAIT_ABS;
200 tmp_event[2] = 0;
201 tmp_event[3] = 0;
202 *(unsigned int *) &tmp_event[4] = this_time;
203
204 seq_copy_to_input(tmp_event, 8);
205 prev_input_time = this_time;
206 }
207 seq_copy_to_input(event_rec, len);
208 }
209 EXPORT_SYMBOL(seq_input_event);
210
211 int sequencer_write(int dev, struct file *file, const char __user *buf, int count)
212 {
213 unsigned char event_rec[EV_SZ], ev_code;
214 int p = 0, c, ev_size;
215 int mode = translate_mode(file);
216
217 dev = dev >> 4;
218
219 if (mode == OPEN_READ)
220 return -EIO;
221
222 c = count;
223
224 while (c >= 4)
225 {
226 if (copy_from_user((char *) event_rec, &(buf)[p], 4))
227 goto out;
228 ev_code = event_rec[0];
229
230 if (ev_code == SEQ_FULLSIZE)
231 {
232 int err, fmt;
233
234 dev = *(unsigned short *) &event_rec[2];
235 if (dev < 0 || dev >= max_synthdev || synth_devs[dev] == NULL)
236 return -ENXIO;
237
238 if (!(synth_open_mask & (1 << dev)))
239 return -ENXIO;
240
241 fmt = (*(short *) &event_rec[0]) & 0xffff;
242 err = synth_devs[dev]->load_patch(dev, fmt, buf + p, c, 0);
243 if (err < 0)
244 return err;
245
246 return err;
247 }
248 if (ev_code >= 128)
249 {
250 if (seq_mode == SEQ_2 && ev_code == SEQ_EXTENDED)
251 {
252 printk(KERN_WARNING "Sequencer: Invalid level 2 event %x\n", ev_code);
253 return -EINVAL;
254 }
255 ev_size = 8;
256
257 if (c < ev_size)
258 {
259 if (!seq_playing)
260 seq_startplay();
261 return count - c;
262 }
263 if (copy_from_user((char *)&event_rec[4],
264 &(buf)[p + 4], 4))
265 goto out;
266
267 }
268 else
269 {
270 if (seq_mode == SEQ_2)
271 {
272 printk(KERN_WARNING "Sequencer: 4 byte event in level 2 mode\n");
273 return -EINVAL;
274 }
275 ev_size = 4;
276
277 if (event_rec[0] != SEQ_MIDIPUTC)
278 obsolete_api_used = 1;
279 }
280
281 if (event_rec[0] == SEQ_MIDIPUTC)
282 {
283 if (!midi_opened[event_rec[2]])
284 {
285 int err, mode;
286 int dev = event_rec[2];
287
288 if (dev >= max_mididev || midi_devs[dev]==NULL)
289 {
290 /*printk("Sequencer Error: Nonexistent MIDI device %d\n", dev);*/
291 return -ENXIO;
292 }
293 mode = translate_mode(file);
294
295 if ((err = midi_devs[dev]->open(dev, mode,
296 sequencer_midi_input, sequencer_midi_output)) < 0)
297 {
298 seq_reset();
299 printk(KERN_WARNING "Sequencer Error: Unable to open Midi #%d\n", dev);
300 return err;
301 }
302 midi_opened[dev] = 1;
303 }
304 }
305 if (!seq_queue(event_rec, (file->f_flags & (O_NONBLOCK) ? 1 : 0)))
306 {
307 int processed = count - c;
308
309 if (!seq_playing)
310 seq_startplay();
311
312 if (!processed && (file->f_flags & O_NONBLOCK))
313 return -EAGAIN;
314 else
315 return processed;
316 }
317 p += ev_size;
318 c -= ev_size;
319 }
320
321 if (!seq_playing)
322 seq_startplay();
323 out:
324 return count;
325 }
326
327 static int seq_queue(unsigned char *note, char nonblock)
328 {
329
330 /*
331 * Test if there is space in the queue
332 */
333
334 if (qlen >= SEQ_MAX_QUEUE)
335 if (!seq_playing)
336 seq_startplay(); /*
337 * Give chance to drain the queue
338 */
339
340 if (!nonblock && qlen >= SEQ_MAX_QUEUE && !waitqueue_active(&seq_sleeper)) {
341 /*
342 * Sleep until there is enough space on the queue
343 */
344 oss_broken_sleep_on(&seq_sleeper, MAX_SCHEDULE_TIMEOUT);
345 }
346 if (qlen >= SEQ_MAX_QUEUE)
347 {
348 return 0; /*
349 * To be sure
350 */
351 }
352 memcpy(&queue[qtail * EV_SZ], note, EV_SZ);
353
354 qtail = (qtail + 1) % SEQ_MAX_QUEUE;
355 qlen++;
356
357 return 1;
358 }
359
360 static int extended_event(unsigned char *q)
361 {
362 int dev = q[2];
363
364 if (dev < 0 || dev >= max_synthdev)
365 return -ENXIO;
366
367 if (!(synth_open_mask & (1 << dev)))
368 return -ENXIO;
369
370 switch (q[1])
371 {
372 case SEQ_NOTEOFF:
373 synth_devs[dev]->kill_note(dev, q[3], q[4], q[5]);
374 break;
375
376 case SEQ_NOTEON:
377 if (q[4] > 127 && q[4] != 255)
378 return 0;
379
380 if (q[5] == 0)
381 {
382 synth_devs[dev]->kill_note(dev, q[3], q[4], q[5]);
383 break;
384 }
385 synth_devs[dev]->start_note(dev, q[3], q[4], q[5]);
386 break;
387
388 case SEQ_PGMCHANGE:
389 synth_devs[dev]->set_instr(dev, q[3], q[4]);
390 break;
391
392 case SEQ_AFTERTOUCH:
393 synth_devs[dev]->aftertouch(dev, q[3], q[4]);
394 break;
395
396 case SEQ_BALANCE:
397 synth_devs[dev]->panning(dev, q[3], (char) q[4]);
398 break;
399
400 case SEQ_CONTROLLER:
401 synth_devs[dev]->controller(dev, q[3], q[4], (short) (q[5] | (q[6] << 8)));
402 break;
403
404 case SEQ_VOLMODE:
405 if (synth_devs[dev]->volume_method != NULL)
406 synth_devs[dev]->volume_method(dev, q[3]);
407 break;
408
409 default:
410 return -EINVAL;
411 }
412 return 0;
413 }
414
415 static int find_voice(int dev, int chn, int note)
416 {
417 unsigned short key;
418 int i;
419
420 key = (chn << 8) | (note + 1);
421 for (i = 0; i < synth_devs[dev]->alloc.max_voice; i++)
422 if (synth_devs[dev]->alloc.map[i] == key)
423 return i;
424 return -1;
425 }
426
427 static int alloc_voice(int dev, int chn, int note)
428 {
429 unsigned short key;
430 int voice;
431
432 key = (chn << 8) | (note + 1);
433
434 voice = synth_devs[dev]->alloc_voice(dev, chn, note,
435 &synth_devs[dev]->alloc);
436 synth_devs[dev]->alloc.map[voice] = key;
437 synth_devs[dev]->alloc.alloc_times[voice] =
438 synth_devs[dev]->alloc.timestamp++;
439 return voice;
440 }
441
442 static void seq_chn_voice_event(unsigned char *event_rec)
443 {
444 #define dev event_rec[1]
445 #define cmd event_rec[2]
446 #define chn event_rec[3]
447 #define note event_rec[4]
448 #define parm event_rec[5]
449
450 int voice = -1;
451
452 if ((int) dev > max_synthdev || synth_devs[dev] == NULL)
453 return;
454 if (!(synth_open_mask & (1 << dev)))
455 return;
456 if (!synth_devs[dev])
457 return;
458
459 if (seq_mode == SEQ_2)
460 {
461 if (synth_devs[dev]->alloc_voice)
462 voice = find_voice(dev, chn, note);
463
464 if (cmd == MIDI_NOTEON && parm == 0)
465 {
466 cmd = MIDI_NOTEOFF;
467 parm = 64;
468 }
469 }
470
471 switch (cmd)
472 {
473 case MIDI_NOTEON:
474 if (note > 127 && note != 255) /* Not a seq2 feature */
475 return;
476
477 if (voice == -1 && seq_mode == SEQ_2 && synth_devs[dev]->alloc_voice)
478 {
479 /* Internal synthesizer (FM, GUS, etc) */
480 voice = alloc_voice(dev, chn, note);
481 }
482 if (voice == -1)
483 voice = chn;
484
485 if (seq_mode == SEQ_2 && (int) dev < num_synths)
486 {
487 /*
488 * The MIDI channel 10 is a percussive channel. Use the note
489 * number to select the proper patch (128 to 255) to play.
490 */
491
492 if (chn == 9)
493 {
494 synth_devs[dev]->set_instr(dev, voice, 128 + note);
495 synth_devs[dev]->chn_info[chn].pgm_num = 128 + note;
496 }
497 synth_devs[dev]->setup_voice(dev, voice, chn);
498 }
499 synth_devs[dev]->start_note(dev, voice, note, parm);
500 break;
501
502 case MIDI_NOTEOFF:
503 if (voice == -1)
504 voice = chn;
505 synth_devs[dev]->kill_note(dev, voice, note, parm);
506 break;
507
508 case MIDI_KEY_PRESSURE:
509 if (voice == -1)
510 voice = chn;
511 synth_devs[dev]->aftertouch(dev, voice, parm);
512 break;
513
514 default:;
515 }
516 #undef dev
517 #undef cmd
518 #undef chn
519 #undef note
520 #undef parm
521 }
522
523
524 static void seq_chn_common_event(unsigned char *event_rec)
525 {
526 unsigned char dev = event_rec[1];
527 unsigned char cmd = event_rec[2];
528 unsigned char chn = event_rec[3];
529 unsigned char p1 = event_rec[4];
530
531 /* unsigned char p2 = event_rec[5]; */
532 unsigned short w14 = *(short *) &event_rec[6];
533
534 if ((int) dev > max_synthdev || synth_devs[dev] == NULL)
535 return;
536 if (!(synth_open_mask & (1 << dev)))
537 return;
538 if (!synth_devs[dev])
539 return;
540
541 switch (cmd)
542 {
543 case MIDI_PGM_CHANGE:
544 if (seq_mode == SEQ_2)
545 {
546 if (chn > 15)
547 break;
548
549 synth_devs[dev]->chn_info[chn].pgm_num = p1;
550 if ((int) dev >= num_synths)
551 synth_devs[dev]->set_instr(dev, chn, p1);
552 }
553 else
554 synth_devs[dev]->set_instr(dev, chn, p1);
555
556 break;
557
558 case MIDI_CTL_CHANGE:
559 if (seq_mode == SEQ_2)
560 {
561 if (chn > 15 || p1 > 127)
562 break;
563
564 synth_devs[dev]->chn_info[chn].controllers[p1] = w14 & 0x7f;
565
566 if (p1 < 32) /* Setting MSB should clear LSB to 0 */
567 synth_devs[dev]->chn_info[chn].controllers[p1 + 32] = 0;
568
569 if ((int) dev < num_synths)
570 {
571 int val = w14 & 0x7f;
572 int i, key;
573
574 if (p1 < 64) /* Combine MSB and LSB */
575 {
576 val = ((synth_devs[dev]->
577 chn_info[chn].controllers[p1 & ~32] & 0x7f) << 7)
578 | (synth_devs[dev]->
579 chn_info[chn].controllers[p1 | 32] & 0x7f);
580 p1 &= ~32;
581 }
582 /* Handle all playing notes on this channel */
583
584 key = ((int) chn << 8);
585
586 for (i = 0; i < synth_devs[dev]->alloc.max_voice; i++)
587 if ((synth_devs[dev]->alloc.map[i] & 0xff00) == key)
588 synth_devs[dev]->controller(dev, i, p1, val);
589 }
590 else
591 synth_devs[dev]->controller(dev, chn, p1, w14);
592 }
593 else /* Mode 1 */
594 synth_devs[dev]->controller(dev, chn, p1, w14);
595 break;
596
597 case MIDI_PITCH_BEND:
598 if (seq_mode == SEQ_2)
599 {
600 if (chn > 15)
601 break;
602
603 synth_devs[dev]->chn_info[chn].bender_value = w14;
604
605 if ((int) dev < num_synths)
606 {
607 /* Handle all playing notes on this channel */
608 int i, key;
609
610 key = (chn << 8);
611
612 for (i = 0; i < synth_devs[dev]->alloc.max_voice; i++)
613 if ((synth_devs[dev]->alloc.map[i] & 0xff00) == key)
614 synth_devs[dev]->bender(dev, i, w14);
615 }
616 else
617 synth_devs[dev]->bender(dev, chn, w14);
618 }
619 else /* MODE 1 */
620 synth_devs[dev]->bender(dev, chn, w14);
621 break;
622
623 default:;
624 }
625 }
626
627 static int seq_timing_event(unsigned char *event_rec)
628 {
629 unsigned char cmd = event_rec[1];
630 unsigned int parm = *(int *) &event_rec[4];
631
632 if (seq_mode == SEQ_2)
633 {
634 int ret;
635
636 if ((ret = tmr->event(tmr_no, event_rec)) == TIMER_ARMED)
637 if ((SEQ_MAX_QUEUE - qlen) >= output_threshold)
638 wake_up(&seq_sleeper);
639 return ret;
640 }
641 switch (cmd)
642 {
643 case TMR_WAIT_REL:
644 parm += prev_event_time;
645
646 /*
647 * NOTE! No break here. Execution of TMR_WAIT_REL continues in the
648 * next case (TMR_WAIT_ABS)
649 */
650
651 case TMR_WAIT_ABS:
652 if (parm > 0)
653 {
654 long time;
655
656 time = parm;
657 prev_event_time = time;
658
659 seq_playing = 1;
660 request_sound_timer(time);
661
662 if ((SEQ_MAX_QUEUE - qlen) >= output_threshold)
663 wake_up(&seq_sleeper);
664 return TIMER_ARMED;
665 }
666 break;
667
668 case TMR_START:
669 seq_time = jiffies;
670 prev_input_time = 0;
671 prev_event_time = 0;
672 break;
673
674 case TMR_STOP:
675 break;
676
677 case TMR_CONTINUE:
678 break;
679
680 case TMR_TEMPO:
681 break;
682
683 case TMR_ECHO:
684 parm = (parm << 8 | SEQ_ECHO);
685 seq_copy_to_input((unsigned char *) &parm, 4);
686 break;
687
688 default:;
689 }
690
691 return TIMER_NOT_ARMED;
692 }
693
694 static void seq_local_event(unsigned char *event_rec)
695 {
696 unsigned char cmd = event_rec[1];
697 unsigned int parm = *((unsigned int *) &event_rec[4]);
698
699 switch (cmd)
700 {
701 case LOCL_STARTAUDIO:
702 DMAbuf_start_devices(parm);
703 break;
704
705 default:;
706 }
707 }
708
709 static void seq_sysex_message(unsigned char *event_rec)
710 {
711 unsigned int dev = event_rec[1];
712 int i, l = 0;
713 unsigned char *buf = &event_rec[2];
714
715 if (dev > max_synthdev)
716 return;
717 if (!(synth_open_mask & (1 << dev)))
718 return;
719 if (!synth_devs[dev])
720 return;
721
722 l = 0;
723 for (i = 0; i < 6 && buf[i] != 0xff; i++)
724 l = i + 1;
725
726 if (!synth_devs[dev]->send_sysex)
727 return;
728 if (l > 0)
729 synth_devs[dev]->send_sysex(dev, buf, l);
730 }
731
732 static int play_event(unsigned char *q)
733 {
734 /*
735 * NOTE! This routine returns
736 * 0 = normal event played.
737 * 1 = Timer armed. Suspend playback until timer callback.
738 * 2 = MIDI output buffer full. Restore queue and suspend until timer
739 */
740 unsigned int *delay;
741
742 switch (q[0])
743 {
744 case SEQ_NOTEOFF:
745 if (synth_open_mask & (1 << 0))
746 if (synth_devs[0])
747 synth_devs[0]->kill_note(0, q[1], 255, q[3]);
748 break;
749
750 case SEQ_NOTEON:
751 if (q[4] < 128 || q[4] == 255)
752 if (synth_open_mask & (1 << 0))
753 if (synth_devs[0])
754 synth_devs[0]->start_note(0, q[1], q[2], q[3]);
755 break;
756
757 case SEQ_WAIT:
758 delay = (unsigned int *) q; /*
759 * Bytes 1 to 3 are containing the *
760 * delay in 'ticks'
761 */
762 *delay = (*delay >> 8) & 0xffffff;
763
764 if (*delay > 0)
765 {
766 long time;
767
768 seq_playing = 1;
769 time = *delay;
770 prev_event_time = time;
771
772 request_sound_timer(time);
773
774 if ((SEQ_MAX_QUEUE - qlen) >= output_threshold)
775 wake_up(&seq_sleeper);
776 /*
777 * The timer is now active and will reinvoke this function
778 * after the timer expires. Return to the caller now.
779 */
780 return 1;
781 }
782 break;
783
784 case SEQ_PGMCHANGE:
785 if (synth_open_mask & (1 << 0))
786 if (synth_devs[0])
787 synth_devs[0]->set_instr(0, q[1], q[2]);
788 break;
789
790 case SEQ_SYNCTIMER: /*
791 * Reset timer
792 */
793 seq_time = jiffies;
794 prev_input_time = 0;
795 prev_event_time = 0;
796 break;
797
798 case SEQ_MIDIPUTC: /*
799 * Put a midi character
800 */
801 if (midi_opened[q[2]])
802 {
803 int dev;
804
805 dev = q[2];
806
807 if (dev < 0 || dev >= num_midis || midi_devs[dev] == NULL)
808 break;
809
810 if (!midi_devs[dev]->outputc(dev, q[1]))
811 {
812 /*
813 * Output FIFO is full. Wait one timer cycle and try again.
814 */
815
816 seq_playing = 1;
817 request_sound_timer(-1);
818 return 2;
819 }
820 else
821 midi_written[dev] = 1;
822 }
823 break;
824
825 case SEQ_ECHO:
826 seq_copy_to_input(q, 4); /*
827 * Echo back to the process
828 */
829 break;
830
831 case SEQ_PRIVATE:
832 if ((int) q[1] < max_synthdev)
833 synth_devs[q[1]]->hw_control(q[1], q);
834 break;
835
836 case SEQ_EXTENDED:
837 extended_event(q);
838 break;
839
840 case EV_CHN_VOICE:
841 seq_chn_voice_event(q);
842 break;
843
844 case EV_CHN_COMMON:
845 seq_chn_common_event(q);
846 break;
847
848 case EV_TIMING:
849 if (seq_timing_event(q) == TIMER_ARMED)
850 {
851 return 1;
852 }
853 break;
854
855 case EV_SEQ_LOCAL:
856 seq_local_event(q);
857 break;
858
859 case EV_SYSEX:
860 seq_sysex_message(q);
861 break;
862
863 default:;
864 }
865 return 0;
866 }
867
868 /* called also as timer in irq context */
869 static void seq_startplay(void)
870 {
871 int this_one, action;
872 unsigned long flags;
873
874 while (qlen > 0)
875 {
876
877 spin_lock_irqsave(&lock,flags);
878 qhead = ((this_one = qhead) + 1) % SEQ_MAX_QUEUE;
879 qlen--;
880 spin_unlock_irqrestore(&lock,flags);
881
882 seq_playing = 1;
883
884 if ((action = play_event(&queue[this_one * EV_SZ])))
885 { /* Suspend playback. Next timer routine invokes this routine again */
886 if (action == 2)
887 {
888 qlen++;
889 qhead = this_one;
890 }
891 return;
892 }
893 }
894
895 seq_playing = 0;
896
897 if ((SEQ_MAX_QUEUE - qlen) >= output_threshold)
898 wake_up(&seq_sleeper);
899 }
900
901 static void reset_controllers(int dev, unsigned char *controller, int update_dev)
902 {
903 int i;
904 for (i = 0; i < 128; i++)
905 controller[i] = ctrl_def_values[i];
906 }
907
908 static void setup_mode2(void)
909 {
910 int dev;
911
912 max_synthdev = num_synths;
913
914 for (dev = 0; dev < num_midis; dev++)
915 {
916 if (midi_devs[dev] && midi_devs[dev]->converter != NULL)
917 {
918 synth_devs[max_synthdev++] = midi_devs[dev]->converter;
919 }
920 }
921
922 for (dev = 0; dev < max_synthdev; dev++)
923 {
924 int chn;
925
926 synth_devs[dev]->sysex_ptr = 0;
927 synth_devs[dev]->emulation = 0;
928
929 for (chn = 0; chn < 16; chn++)
930 {
931 synth_devs[dev]->chn_info[chn].pgm_num = 0;
932 reset_controllers(dev,
933 synth_devs[dev]->chn_info[chn].controllers,0);
934 synth_devs[dev]->chn_info[chn].bender_value = (1 << 7); /* Neutral */
935 synth_devs[dev]->chn_info[chn].bender_range = 200;
936 }
937 }
938 max_mididev = 0;
939 seq_mode = SEQ_2;
940 }
941
942 int sequencer_open(int dev, struct file *file)
943 {
944 int retval, mode, i;
945 int level, tmp;
946
947 if (!sequencer_ok)
948 sequencer_init();
949
950 level = ((dev & 0x0f) == SND_DEV_SEQ2) ? 2 : 1;
951
952 dev = dev >> 4;
953 mode = translate_mode(file);
954
955 if (!sequencer_ok)
956 {
957 /* printk("Sound card: sequencer not initialized\n");*/
958 return -ENXIO;
959 }
960 if (dev) /* Patch manager device (obsolete) */
961 return -ENXIO;
962
963 if(synth_devs[dev] == NULL)
964 request_module("synth0");
965
966 if (mode == OPEN_READ)
967 {
968 if (!num_midis)
969 {
970 /*printk("Sequencer: No MIDI devices. Input not possible\n");*/
971 sequencer_busy = 0;
972 return -ENXIO;
973 }
974 }
975 if (sequencer_busy)
976 {
977 return -EBUSY;
978 }
979 sequencer_busy = 1;
980 obsolete_api_used = 0;
981
982 max_mididev = num_midis;
983 max_synthdev = num_synths;
984 pre_event_timeout = MAX_SCHEDULE_TIMEOUT;
985 seq_mode = SEQ_1;
986
987 if (pending_timer != -1)
988 {
989 tmr_no = pending_timer;
990 pending_timer = -1;
991 }
992 if (tmr_no == -1) /* Not selected yet */
993 {
994 int i, best;
995
996 best = -1;
997 for (i = 0; i < num_sound_timers; i++)
998 if (sound_timer_devs[i] && sound_timer_devs[i]->priority > best)
999 {
1000 tmr_no = i;
1001 best = sound_timer_devs[i]->priority;
1002 }
1003 if (tmr_no == -1) /* Should not be */
1004 tmr_no = 0;
1005 }
1006 tmr = sound_timer_devs[tmr_no];
1007
1008 if (level == 2)
1009 {
1010 if (tmr == NULL)
1011 {
1012 /*printk("sequencer: No timer for level 2\n");*/
1013 sequencer_busy = 0;
1014 return -ENXIO;
1015 }
1016 setup_mode2();
1017 }
1018 if (!max_synthdev && !max_mididev)
1019 {
1020 sequencer_busy=0;
1021 return -ENXIO;
1022 }
1023
1024 synth_open_mask = 0;
1025
1026 for (i = 0; i < max_mididev; i++)
1027 {
1028 midi_opened[i] = 0;
1029 midi_written[i] = 0;
1030 }
1031
1032 for (i = 0; i < max_synthdev; i++)
1033 {
1034 if (synth_devs[i]==NULL)
1035 continue;
1036
1037 if (!try_module_get(synth_devs[i]->owner))
1038 continue;
1039
1040 if ((tmp = synth_devs[i]->open(i, mode)) < 0)
1041 {
1042 printk(KERN_WARNING "Sequencer: Warning! Cannot open synth device #%d (%d)\n", i, tmp);
1043 if (synth_devs[i]->midi_dev)
1044 printk(KERN_WARNING "(Maps to MIDI dev #%d)\n", synth_devs[i]->midi_dev);
1045 }
1046 else
1047 {
1048 synth_open_mask |= (1 << i);
1049 if (synth_devs[i]->midi_dev)
1050 midi_opened[synth_devs[i]->midi_dev] = 1;
1051 }
1052 }
1053
1054 seq_time = jiffies;
1055
1056 prev_input_time = 0;
1057 prev_event_time = 0;
1058
1059 if (seq_mode == SEQ_1 && (mode == OPEN_READ || mode == OPEN_READWRITE))
1060 {
1061 /*
1062 * Initialize midi input devices
1063 */
1064
1065 for (i = 0; i < max_mididev; i++)
1066 if (!midi_opened[i] && midi_devs[i])
1067 {
1068 if (!try_module_get(midi_devs[i]->owner))
1069 continue;
1070
1071 if ((retval = midi_devs[i]->open(i, mode,
1072 sequencer_midi_input, sequencer_midi_output)) >= 0)
1073 {
1074 midi_opened[i] = 1;
1075 }
1076 }
1077 }
1078
1079 if (seq_mode == SEQ_2) {
1080 if (try_module_get(tmr->owner))
1081 tmr->open(tmr_no, seq_mode);
1082 }
1083
1084 init_waitqueue_head(&seq_sleeper);
1085 init_waitqueue_head(&midi_sleeper);
1086 output_threshold = SEQ_MAX_QUEUE / 2;
1087
1088 return 0;
1089 }
1090
1091 static void seq_drain_midi_queues(void)
1092 {
1093 int i, n;
1094
1095 /*
1096 * Give the Midi drivers time to drain their output queues
1097 */
1098
1099 n = 1;
1100
1101 while (!signal_pending(current) && n)
1102 {
1103 n = 0;
1104
1105 for (i = 0; i < max_mididev; i++)
1106 if (midi_opened[i] && midi_written[i])
1107 if (midi_devs[i]->buffer_status != NULL)
1108 if (midi_devs[i]->buffer_status(i))
1109 n++;
1110
1111 /*
1112 * Let's have a delay
1113 */
1114
1115 if (n)
1116 oss_broken_sleep_on(&seq_sleeper, HZ/10);
1117 }
1118 }
1119
1120 void sequencer_release(int dev, struct file *file)
1121 {
1122 int i;
1123 int mode = translate_mode(file);
1124
1125 dev = dev >> 4;
1126
1127 /*
1128 * Wait until the queue is empty (if we don't have nonblock)
1129 */
1130
1131 if (mode != OPEN_READ && !(file->f_flags & O_NONBLOCK))
1132 {
1133 while (!signal_pending(current) && qlen > 0)
1134 {
1135 seq_sync();
1136 oss_broken_sleep_on(&seq_sleeper, 3*HZ);
1137 /* Extra delay */
1138 }
1139 }
1140
1141 if (mode != OPEN_READ)
1142 seq_drain_midi_queues(); /*
1143 * Ensure the output queues are empty
1144 */
1145 seq_reset();
1146 if (mode != OPEN_READ)
1147 seq_drain_midi_queues(); /*
1148 * Flush the all notes off messages
1149 */
1150
1151 for (i = 0; i < max_synthdev; i++)
1152 {
1153 if (synth_open_mask & (1 << i)) /*
1154 * Actually opened
1155 */
1156 if (synth_devs[i])
1157 {
1158 synth_devs[i]->close(i);
1159
1160 module_put(synth_devs[i]->owner);
1161
1162 if (synth_devs[i]->midi_dev)
1163 midi_opened[synth_devs[i]->midi_dev] = 0;
1164 }
1165 }
1166
1167 for (i = 0; i < max_mididev; i++)
1168 {
1169 if (midi_opened[i]) {
1170 midi_devs[i]->close(i);
1171 module_put(midi_devs[i]->owner);
1172 }
1173 }
1174
1175 if (seq_mode == SEQ_2) {
1176 tmr->close(tmr_no);
1177 module_put(tmr->owner);
1178 }
1179
1180 if (obsolete_api_used)
1181 printk(KERN_WARNING "/dev/music: Obsolete (4 byte) API was used by %s\n", current->comm);
1182 sequencer_busy = 0;
1183 }
1184
1185 static int seq_sync(void)
1186 {
1187 if (qlen && !seq_playing && !signal_pending(current))
1188 seq_startplay();
1189
1190 if (qlen > 0)
1191 oss_broken_sleep_on(&seq_sleeper, HZ);
1192 return qlen;
1193 }
1194
1195 static void midi_outc(int dev, unsigned char data)
1196 {
1197 /*
1198 * NOTE! Calls sleep(). Don't call this from interrupt.
1199 */
1200
1201 int n;
1202 unsigned long flags;
1203
1204 /*
1205 * This routine sends one byte to the Midi channel.
1206 * If the output FIFO is full, it waits until there
1207 * is space in the queue
1208 */
1209
1210 n = 3 * HZ; /* Timeout */
1211
1212 spin_lock_irqsave(&lock,flags);
1213 while (n && !midi_devs[dev]->outputc(dev, data)) {
1214 oss_broken_sleep_on(&seq_sleeper, HZ/25);
1215 n--;
1216 }
1217 spin_unlock_irqrestore(&lock,flags);
1218 }
1219
1220 static void seq_reset(void)
1221 {
1222 /*
1223 * NOTE! Calls sleep(). Don't call this from interrupt.
1224 */
1225
1226 int i;
1227 int chn;
1228 unsigned long flags;
1229
1230 sound_stop_timer();
1231
1232 seq_time = jiffies;
1233 prev_input_time = 0;
1234 prev_event_time = 0;
1235
1236 qlen = qhead = qtail = 0;
1237 iqlen = iqhead = iqtail = 0;
1238
1239 for (i = 0; i < max_synthdev; i++)
1240 if (synth_open_mask & (1 << i))
1241 if (synth_devs[i])
1242 synth_devs[i]->reset(i);
1243
1244 if (seq_mode == SEQ_2)
1245 {
1246 for (chn = 0; chn < 16; chn++)
1247 for (i = 0; i < max_synthdev; i++)
1248 if (synth_open_mask & (1 << i))
1249 if (synth_devs[i])
1250 {
1251 synth_devs[i]->controller(i, chn, 123, 0); /* All notes off */
1252 synth_devs[i]->controller(i, chn, 121, 0); /* Reset all ctl */
1253 synth_devs[i]->bender(i, chn, 1 << 13); /* Bender off */
1254 }
1255 }
1256 else /* seq_mode == SEQ_1 */
1257 {
1258 for (i = 0; i < max_mididev; i++)
1259 if (midi_written[i]) /*
1260 * Midi used. Some notes may still be playing
1261 */
1262 {
1263 /*
1264 * Sending just a ACTIVE SENSING message should be enough to stop all
1265 * playing notes. Since there are devices not recognizing the
1266 * active sensing, we have to send some all notes off messages also.
1267 */
1268 midi_outc(i, 0xfe);
1269
1270 for (chn = 0; chn < 16; chn++)
1271 {
1272 midi_outc(i, (unsigned char) (0xb0 + (chn & 0x0f))); /* control change */
1273 midi_outc(i, 0x7b); /* All notes off */
1274 midi_outc(i, 0); /* Dummy parameter */
1275 }
1276
1277 midi_devs[i]->close(i);
1278
1279 midi_written[i] = 0;
1280 midi_opened[i] = 0;
1281 }
1282 }
1283
1284 seq_playing = 0;
1285
1286 spin_lock_irqsave(&lock,flags);
1287
1288 if (waitqueue_active(&seq_sleeper)) {
1289 /* printk( "Sequencer Warning: Unexpected sleeping process - Waking up\n"); */
1290 wake_up(&seq_sleeper);
1291 }
1292 spin_unlock_irqrestore(&lock,flags);
1293 }
1294
1295 static void seq_panic(void)
1296 {
1297 /*
1298 * This routine is called by the application in case the user
1299 * wants to reset the system to the default state.
1300 */
1301
1302 seq_reset();
1303
1304 /*
1305 * Since some of the devices don't recognize the active sensing and
1306 * all notes off messages, we have to shut all notes manually.
1307 *
1308 * TO BE IMPLEMENTED LATER
1309 */
1310
1311 /*
1312 * Also return the controllers to their default states
1313 */
1314 }
1315
1316 int sequencer_ioctl(int dev, struct file *file, unsigned int cmd, void __user *arg)
1317 {
1318 int midi_dev, orig_dev, val, err;
1319 int mode = translate_mode(file);
1320 struct synth_info inf;
1321 struct seq_event_rec event_rec;
1322 int __user *p = arg;
1323
1324 orig_dev = dev = dev >> 4;
1325
1326 switch (cmd)
1327 {
1328 case SNDCTL_TMR_TIMEBASE:
1329 case SNDCTL_TMR_TEMPO:
1330 case SNDCTL_TMR_START:
1331 case SNDCTL_TMR_STOP:
1332 case SNDCTL_TMR_CONTINUE:
1333 case SNDCTL_TMR_METRONOME:
1334 case SNDCTL_TMR_SOURCE:
1335 if (seq_mode != SEQ_2)
1336 return -EINVAL;
1337 return tmr->ioctl(tmr_no, cmd, arg);
1338
1339 case SNDCTL_TMR_SELECT:
1340 if (seq_mode != SEQ_2)
1341 return -EINVAL;
1342 if (get_user(pending_timer, p))
1343 return -EFAULT;
1344 if (pending_timer < 0 || pending_timer >= num_sound_timers || sound_timer_devs[pending_timer] == NULL)
1345 {
1346 pending_timer = -1;
1347 return -EINVAL;
1348 }
1349 val = pending_timer;
1350 break;
1351
1352 case SNDCTL_SEQ_PANIC:
1353 seq_panic();
1354 return -EINVAL;
1355
1356 case SNDCTL_SEQ_SYNC:
1357 if (mode == OPEN_READ)
1358 return 0;
1359 while (qlen > 0 && !signal_pending(current))
1360 seq_sync();
1361 return qlen ? -EINTR : 0;
1362
1363 case SNDCTL_SEQ_RESET:
1364 seq_reset();
1365 return 0;
1366
1367 case SNDCTL_SEQ_TESTMIDI:
1368 if (__get_user(midi_dev, p))
1369 return -EFAULT;
1370 if (midi_dev < 0 || midi_dev >= max_mididev || !midi_devs[midi_dev])
1371 return -ENXIO;
1372
1373 if (!midi_opened[midi_dev] &&
1374 (err = midi_devs[midi_dev]->open(midi_dev, mode, sequencer_midi_input,
1375 sequencer_midi_output)) < 0)
1376 return err;
1377 midi_opened[midi_dev] = 1;
1378 return 0;
1379
1380 case SNDCTL_SEQ_GETINCOUNT:
1381 if (mode == OPEN_WRITE)
1382 return 0;
1383 val = iqlen;
1384 break;
1385
1386 case SNDCTL_SEQ_GETOUTCOUNT:
1387 if (mode == OPEN_READ)
1388 return 0;
1389 val = SEQ_MAX_QUEUE - qlen;
1390 break;
1391
1392 case SNDCTL_SEQ_GETTIME:
1393 if (seq_mode == SEQ_2)
1394 return tmr->ioctl(tmr_no, cmd, arg);
1395 val = jiffies - seq_time;
1396 break;
1397
1398 case SNDCTL_SEQ_CTRLRATE:
1399 /*
1400 * If *arg == 0, just return the current rate
1401 */
1402 if (seq_mode == SEQ_2)
1403 return tmr->ioctl(tmr_no, cmd, arg);
1404
1405 if (get_user(val, p))
1406 return -EFAULT;
1407 if (val != 0)
1408 return -EINVAL;
1409 val = HZ;
1410 break;
1411
1412 case SNDCTL_SEQ_RESETSAMPLES:
1413 case SNDCTL_SYNTH_REMOVESAMPLE:
1414 case SNDCTL_SYNTH_CONTROL:
1415 if (get_user(dev, p))
1416 return -EFAULT;
1417 if (dev < 0 || dev >= num_synths || synth_devs[dev] == NULL)
1418 return -ENXIO;
1419 if (!(synth_open_mask & (1 << dev)) && !orig_dev)
1420 return -EBUSY;
1421 return synth_devs[dev]->ioctl(dev, cmd, arg);
1422
1423 case SNDCTL_SEQ_NRSYNTHS:
1424 val = max_synthdev;
1425 break;
1426
1427 case SNDCTL_SEQ_NRMIDIS:
1428 val = max_mididev;
1429 break;
1430
1431 case SNDCTL_SYNTH_MEMAVL:
1432 if (get_user(dev, p))
1433 return -EFAULT;
1434 if (dev < 0 || dev >= num_synths || synth_devs[dev] == NULL)
1435 return -ENXIO;
1436 if (!(synth_open_mask & (1 << dev)) && !orig_dev)
1437 return -EBUSY;
1438 val = synth_devs[dev]->ioctl(dev, cmd, arg);
1439 break;
1440
1441 case SNDCTL_FM_4OP_ENABLE:
1442 if (get_user(dev, p))
1443 return -EFAULT;
1444 if (dev < 0 || dev >= num_synths || synth_devs[dev] == NULL)
1445 return -ENXIO;
1446 if (!(synth_open_mask & (1 << dev)))
1447 return -ENXIO;
1448 synth_devs[dev]->ioctl(dev, cmd, arg);
1449 return 0;
1450
1451 case SNDCTL_SYNTH_INFO:
1452 if (get_user(dev, &((struct synth_info __user *)arg)->device))
1453 return -EFAULT;
1454 if (dev < 0 || dev >= max_synthdev)
1455 return -ENXIO;
1456 if (!(synth_open_mask & (1 << dev)) && !orig_dev)
1457 return -EBUSY;
1458 return synth_devs[dev]->ioctl(dev, cmd, arg);
1459
1460 /* Like SYNTH_INFO but returns ID in the name field */
1461 case SNDCTL_SYNTH_ID:
1462 if (get_user(dev, &((struct synth_info __user *)arg)->device))
1463 return -EFAULT;
1464 if (dev < 0 || dev >= max_synthdev)
1465 return -ENXIO;
1466 if (!(synth_open_mask & (1 << dev)) && !orig_dev)
1467 return -EBUSY;
1468 memcpy(&inf, synth_devs[dev]->info, sizeof(inf));
1469 strlcpy(inf.name, synth_devs[dev]->id, sizeof(inf.name));
1470 inf.device = dev;
1471 return copy_to_user(arg, &inf, sizeof(inf))?-EFAULT:0;
1472
1473 case SNDCTL_SEQ_OUTOFBAND:
1474 if (copy_from_user(&event_rec, arg, sizeof(event_rec)))
1475 return -EFAULT;
1476 play_event(event_rec.arr);
1477 return 0;
1478
1479 case SNDCTL_MIDI_INFO:
1480 if (get_user(dev, &((struct midi_info __user *)arg)->device))
1481 return -EFAULT;
1482 if (dev < 0 || dev >= max_mididev || !midi_devs[dev])
1483 return -ENXIO;
1484 midi_devs[dev]->info.device = dev;
1485 return copy_to_user(arg, &midi_devs[dev]->info, sizeof(struct midi_info))?-EFAULT:0;
1486
1487 case SNDCTL_SEQ_THRESHOLD:
1488 if (get_user(val, p))
1489 return -EFAULT;
1490 if (val < 1)
1491 val = 1;
1492 if (val >= SEQ_MAX_QUEUE)
1493 val = SEQ_MAX_QUEUE - 1;
1494 output_threshold = val;
1495 return 0;
1496
1497 case SNDCTL_MIDI_PRETIME:
1498 if (get_user(val, p))
1499 return -EFAULT;
1500 if (val < 0)
1501 val = 0;
1502 val = (HZ * val) / 10;
1503 pre_event_timeout = val;
1504 break;
1505
1506 default:
1507 if (mode == OPEN_READ)
1508 return -EIO;
1509 if (!synth_devs[0])
1510 return -ENXIO;
1511 if (!(synth_open_mask & (1 << 0)))
1512 return -ENXIO;
1513 if (!synth_devs[0]->ioctl)
1514 return -EINVAL;
1515 return synth_devs[0]->ioctl(0, cmd, arg);
1516 }
1517 return put_user(val, p);
1518 }
1519
1520 /* No kernel lock - we're using the global irq lock here */
1521 unsigned int sequencer_poll(int dev, struct file *file, poll_table * wait)
1522 {
1523 unsigned long flags;
1524 unsigned int mask = 0;
1525
1526 dev = dev >> 4;
1527
1528 spin_lock_irqsave(&lock,flags);
1529 /* input */
1530 poll_wait(file, &midi_sleeper, wait);
1531 if (iqlen)
1532 mask |= POLLIN | POLLRDNORM;
1533
1534 /* output */
1535 poll_wait(file, &seq_sleeper, wait);
1536 if ((SEQ_MAX_QUEUE - qlen) >= output_threshold)
1537 mask |= POLLOUT | POLLWRNORM;
1538 spin_unlock_irqrestore(&lock,flags);
1539 return mask;
1540 }
1541
1542
1543 void sequencer_timer(unsigned long dummy)
1544 {
1545 seq_startplay();
1546 }
1547 EXPORT_SYMBOL(sequencer_timer);
1548
1549 int note_to_freq(int note_num)
1550 {
1551
1552 /*
1553 * This routine converts a midi note to a frequency (multiplied by 1000)
1554 */
1555
1556 int note, octave, note_freq;
1557 static int notes[] =
1558 {
1559 261632, 277189, 293671, 311132, 329632, 349232,
1560 369998, 391998, 415306, 440000, 466162, 493880
1561 };
1562
1563 #define BASE_OCTAVE 5
1564
1565 octave = note_num / 12;
1566 note = note_num % 12;
1567
1568 note_freq = notes[note];
1569
1570 if (octave < BASE_OCTAVE)
1571 note_freq >>= (BASE_OCTAVE - octave);
1572 else if (octave > BASE_OCTAVE)
1573 note_freq <<= (octave - BASE_OCTAVE);
1574
1575 /*
1576 * note_freq >>= 1;
1577 */
1578
1579 return note_freq;
1580 }
1581 EXPORT_SYMBOL(note_to_freq);
1582
1583 unsigned long compute_finetune(unsigned long base_freq, int bend, int range,
1584 int vibrato_cents)
1585 {
1586 unsigned long amount;
1587 int negative, semitones, cents, multiplier = 1;
1588
1589 if (!bend)
1590 return base_freq;
1591 if (!range)
1592 return base_freq;
1593
1594 if (!base_freq)
1595 return base_freq;
1596
1597 if (range >= 8192)
1598 range = 8192;
1599
1600 bend = bend * range / 8192; /* Convert to cents */
1601 bend += vibrato_cents;
1602
1603 if (!bend)
1604 return base_freq;
1605
1606 negative = bend < 0 ? 1 : 0;
1607
1608 if (bend < 0)
1609 bend *= -1;
1610 if (bend > range)
1611 bend = range;
1612
1613 /*
1614 if (bend > 2399)
1615 bend = 2399;
1616 */
1617 while (bend > 2399)
1618 {
1619 multiplier *= 4;
1620 bend -= 2400;
1621 }
1622
1623 semitones = bend / 100;
1624 cents = bend % 100;
1625
1626 amount = (int) (semitone_tuning[semitones] * multiplier * cent_tuning[cents]) / 10000;
1627
1628 if (negative)
1629 return (base_freq * 10000) / amount; /* Bend down */
1630 else
1631 return (base_freq * amount) / 10000; /* Bend up */
1632 }
1633 EXPORT_SYMBOL(compute_finetune);
1634
1635 void sequencer_init(void)
1636 {
1637 if (sequencer_ok)
1638 return;
1639 queue = vmalloc(SEQ_MAX_QUEUE * EV_SZ);
1640 if (queue == NULL)
1641 {
1642 printk(KERN_ERR "sequencer: Can't allocate memory for sequencer output queue\n");
1643 return;
1644 }
1645 iqueue = vmalloc(SEQ_MAX_QUEUE * IEV_SZ);
1646 if (iqueue == NULL)
1647 {
1648 printk(KERN_ERR "sequencer: Can't allocate memory for sequencer input queue\n");
1649 vfree(queue);
1650 return;
1651 }
1652 sequencer_ok = 1;
1653 }
1654 EXPORT_SYMBOL(sequencer_init);
1655
1656 void sequencer_unload(void)
1657 {
1658 vfree(queue);
1659 vfree(iqueue);
1660 queue = iqueue = NULL;
1661 }
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