Merge branch 'for-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/bluetoot...
[firefly-linux-kernel-4.4.55.git] / sound / oss / sequencer.c
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                         if (seq_mode == SEQ_2)
685                                 seq_copy_to_input(event_rec, 8);
686                         else
687                         {
688                                 parm = (parm << 8 | SEQ_ECHO);
689                                 seq_copy_to_input((unsigned char *) &parm, 4);
690                         }
691                         break;
692
693                 default:;
694         }
695
696         return TIMER_NOT_ARMED;
697 }
698
699 static void seq_local_event(unsigned char *event_rec)
700 {
701         unsigned char   cmd = event_rec[1];
702         unsigned int    parm = *((unsigned int *) &event_rec[4]);
703
704         switch (cmd)
705         {
706                 case LOCL_STARTAUDIO:
707                         DMAbuf_start_devices(parm);
708                         break;
709
710                 default:;
711         }
712 }
713
714 static void seq_sysex_message(unsigned char *event_rec)
715 {
716         unsigned int dev = event_rec[1];
717         int i, l = 0;
718         unsigned char  *buf = &event_rec[2];
719
720         if (dev > max_synthdev)
721                 return;
722         if (!(synth_open_mask & (1 << dev)))
723                 return;
724         if (!synth_devs[dev])
725                 return;
726
727         l = 0;
728         for (i = 0; i < 6 && buf[i] != 0xff; i++)
729                 l = i + 1;
730
731         if (!synth_devs[dev]->send_sysex)
732                 return;
733         if (l > 0)
734                 synth_devs[dev]->send_sysex(dev, buf, l);
735 }
736
737 static int play_event(unsigned char *q)
738 {
739         /*
740          * NOTE! This routine returns
741          *   0 = normal event played.
742          *   1 = Timer armed. Suspend playback until timer callback.
743          *   2 = MIDI output buffer full. Restore queue and suspend until timer
744          */
745         unsigned int *delay;
746
747         switch (q[0])
748         {
749                 case SEQ_NOTEOFF:
750                         if (synth_open_mask & (1 << 0))
751                                 if (synth_devs[0])
752                                         synth_devs[0]->kill_note(0, q[1], 255, q[3]);
753                         break;
754
755                 case SEQ_NOTEON:
756                         if (q[4] < 128 || q[4] == 255)
757                                 if (synth_open_mask & (1 << 0))
758                                         if (synth_devs[0])
759                                                 synth_devs[0]->start_note(0, q[1], q[2], q[3]);
760                         break;
761
762                 case SEQ_WAIT:
763                         delay = (unsigned int *) q;     /*
764                                                          * Bytes 1 to 3 are containing the *
765                                                          * delay in 'ticks'
766                                                          */
767                         *delay = (*delay >> 8) & 0xffffff;
768
769                         if (*delay > 0)
770                         {
771                                 long time;
772
773                                 seq_playing = 1;
774                                 time = *delay;
775                                 prev_event_time = time;
776
777                                 request_sound_timer(time);
778
779                                 if ((SEQ_MAX_QUEUE - qlen) >= output_threshold)
780                                         wake_up(&seq_sleeper);
781                                 /*
782                                  * The timer is now active and will reinvoke this function
783                                  * after the timer expires. Return to the caller now.
784                                  */
785                                 return 1;
786                         }
787                         break;
788
789                 case SEQ_PGMCHANGE:
790                         if (synth_open_mask & (1 << 0))
791                                 if (synth_devs[0])
792                                         synth_devs[0]->set_instr(0, q[1], q[2]);
793                         break;
794
795                 case SEQ_SYNCTIMER:     /*
796                                          * Reset timer
797                                          */
798                         seq_time = jiffies;
799                         prev_input_time = 0;
800                         prev_event_time = 0;
801                         break;
802
803                 case SEQ_MIDIPUTC:      /*
804                                          * Put a midi character
805                                          */
806                         if (midi_opened[q[2]])
807                         {
808                                 int dev;
809
810                                 dev = q[2];
811
812                                 if (dev < 0 || dev >= num_midis || midi_devs[dev] == NULL)
813                                         break;
814
815                                 if (!midi_devs[dev]->outputc(dev, q[1]))
816                                 {
817                                         /*
818                                          * Output FIFO is full. Wait one timer cycle and try again.
819                                          */
820
821                                         seq_playing = 1;
822                                         request_sound_timer(-1);
823                                         return 2;
824                                 }
825                                 else
826                                         midi_written[dev] = 1;
827                         }
828                         break;
829
830                 case SEQ_ECHO:
831                         seq_copy_to_input(q, 4);        /*
832                                                          * Echo back to the process
833                                                          */
834                         break;
835
836                 case SEQ_PRIVATE:
837                         if ((int) q[1] < max_synthdev)
838                                 synth_devs[q[1]]->hw_control(q[1], q);
839                         break;
840
841                 case SEQ_EXTENDED:
842                         extended_event(q);
843                         break;
844
845                 case EV_CHN_VOICE:
846                         seq_chn_voice_event(q);
847                         break;
848
849                 case EV_CHN_COMMON:
850                         seq_chn_common_event(q);
851                         break;
852
853                 case EV_TIMING:
854                         if (seq_timing_event(q) == TIMER_ARMED)
855                         {
856                                 return 1;
857                         }
858                         break;
859
860                 case EV_SEQ_LOCAL:
861                         seq_local_event(q);
862                         break;
863
864                 case EV_SYSEX:
865                         seq_sysex_message(q);
866                         break;
867
868                 default:;
869         }
870         return 0;
871 }
872
873 /* called also as timer in irq context */
874 static void seq_startplay(void)
875 {
876         int this_one, action;
877         unsigned long flags;
878
879         while (qlen > 0)
880         {
881
882                 spin_lock_irqsave(&lock,flags);
883                 qhead = ((this_one = qhead) + 1) % SEQ_MAX_QUEUE;
884                 qlen--;
885                 spin_unlock_irqrestore(&lock,flags);
886
887                 seq_playing = 1;
888
889                 if ((action = play_event(&queue[this_one * EV_SZ])))
890                 {               /* Suspend playback. Next timer routine invokes this routine again */
891                         if (action == 2)
892                         {
893                                 qlen++;
894                                 qhead = this_one;
895                         }
896                         return;
897                 }
898         }
899
900         seq_playing = 0;
901
902         if ((SEQ_MAX_QUEUE - qlen) >= output_threshold)
903                 wake_up(&seq_sleeper);
904 }
905
906 static void reset_controllers(int dev, unsigned char *controller, int update_dev)
907 {
908         int i;
909         for (i = 0; i < 128; i++)
910                 controller[i] = ctrl_def_values[i];
911 }
912
913 static void setup_mode2(void)
914 {
915         int dev;
916
917         max_synthdev = num_synths;
918
919         for (dev = 0; dev < num_midis; dev++)
920         {
921                 if (midi_devs[dev] && midi_devs[dev]->converter != NULL)
922                 {
923                         synth_devs[max_synthdev++] = midi_devs[dev]->converter;
924                 }
925         }
926
927         for (dev = 0; dev < max_synthdev; dev++)
928         {
929                 int chn;
930
931                 synth_devs[dev]->sysex_ptr = 0;
932                 synth_devs[dev]->emulation = 0;
933
934                 for (chn = 0; chn < 16; chn++)
935                 {
936                         synth_devs[dev]->chn_info[chn].pgm_num = 0;
937                         reset_controllers(dev,
938                                 synth_devs[dev]->chn_info[chn].controllers,0);
939                         synth_devs[dev]->chn_info[chn].bender_value = (1 << 7); /* Neutral */
940                         synth_devs[dev]->chn_info[chn].bender_range = 200;
941                 }
942         }
943         max_mididev = 0;
944         seq_mode = SEQ_2;
945 }
946
947 int sequencer_open(int dev, struct file *file)
948 {
949         int retval, mode, i;
950         int level, tmp;
951
952         if (!sequencer_ok)
953                 sequencer_init();
954
955         level = ((dev & 0x0f) == SND_DEV_SEQ2) ? 2 : 1;
956
957         dev = dev >> 4;
958         mode = translate_mode(file);
959
960         if (!sequencer_ok)
961         {
962 /*              printk("Sound card: sequencer not initialized\n");*/
963                 return -ENXIO;
964         }
965         if (dev)                /* Patch manager device (obsolete) */
966                 return -ENXIO;
967
968         if(synth_devs[dev] == NULL)
969                 request_module("synth0");
970
971         if (mode == OPEN_READ)
972         {
973                 if (!num_midis)
974                 {
975                         /*printk("Sequencer: No MIDI devices. Input not possible\n");*/
976                         sequencer_busy = 0;
977                         return -ENXIO;
978                 }
979         }
980         if (sequencer_busy)
981         {
982                 return -EBUSY;
983         }
984         sequencer_busy = 1;
985         obsolete_api_used = 0;
986
987         max_mididev = num_midis;
988         max_synthdev = num_synths;
989         pre_event_timeout = MAX_SCHEDULE_TIMEOUT;
990         seq_mode = SEQ_1;
991
992         if (pending_timer != -1)
993         {
994                 tmr_no = pending_timer;
995                 pending_timer = -1;
996         }
997         if (tmr_no == -1)       /* Not selected yet */
998         {
999                 int i, best;
1000
1001                 best = -1;
1002                 for (i = 0; i < num_sound_timers; i++)
1003                         if (sound_timer_devs[i] && sound_timer_devs[i]->priority > best)
1004                         {
1005                                 tmr_no = i;
1006                                 best = sound_timer_devs[i]->priority;
1007                         }
1008                 if (tmr_no == -1)       /* Should not be */
1009                         tmr_no = 0;
1010         }
1011         tmr = sound_timer_devs[tmr_no];
1012
1013         if (level == 2)
1014         {
1015                 if (tmr == NULL)
1016                 {
1017                         /*printk("sequencer: No timer for level 2\n");*/
1018                         sequencer_busy = 0;
1019                         return -ENXIO;
1020                 }
1021                 setup_mode2();
1022         }
1023         if (!max_synthdev && !max_mididev)
1024         {
1025                 sequencer_busy=0;
1026                 return -ENXIO;
1027         }
1028
1029         synth_open_mask = 0;
1030
1031         for (i = 0; i < max_mididev; i++)
1032         {
1033                 midi_opened[i] = 0;
1034                 midi_written[i] = 0;
1035         }
1036
1037         for (i = 0; i < max_synthdev; i++)
1038         {
1039                 if (synth_devs[i]==NULL)
1040                         continue;
1041
1042                 if (!try_module_get(synth_devs[i]->owner))
1043                         continue;
1044
1045                 if ((tmp = synth_devs[i]->open(i, mode)) < 0)
1046                 {
1047                         printk(KERN_WARNING "Sequencer: Warning! Cannot open synth device #%d (%d)\n", i, tmp);
1048                         if (synth_devs[i]->midi_dev)
1049                                 printk(KERN_WARNING "(Maps to MIDI dev #%d)\n", synth_devs[i]->midi_dev);
1050                 }
1051                 else
1052                 {
1053                         synth_open_mask |= (1 << i);
1054                         if (synth_devs[i]->midi_dev)
1055                                 midi_opened[synth_devs[i]->midi_dev] = 1;
1056                 }
1057         }
1058
1059         seq_time = jiffies;
1060
1061         prev_input_time = 0;
1062         prev_event_time = 0;
1063
1064         if (seq_mode == SEQ_1 && (mode == OPEN_READ || mode == OPEN_READWRITE))
1065         {
1066                 /*
1067                  * Initialize midi input devices
1068                  */
1069
1070                 for (i = 0; i < max_mididev; i++)
1071                         if (!midi_opened[i] && midi_devs[i])
1072                         {
1073                                 if (!try_module_get(midi_devs[i]->owner))
1074                                         continue;
1075         
1076                                 if ((retval = midi_devs[i]->open(i, mode,
1077                                         sequencer_midi_input, sequencer_midi_output)) >= 0)
1078                                 {
1079                                         midi_opened[i] = 1;
1080                                 }
1081                         }
1082         }
1083
1084         if (seq_mode == SEQ_2) {
1085                 if (try_module_get(tmr->owner))
1086                         tmr->open(tmr_no, seq_mode);
1087         }
1088
1089         init_waitqueue_head(&seq_sleeper);
1090         init_waitqueue_head(&midi_sleeper);
1091         output_threshold = SEQ_MAX_QUEUE / 2;
1092
1093         return 0;
1094 }
1095
1096 static void seq_drain_midi_queues(void)
1097 {
1098         int i, n;
1099
1100         /*
1101          * Give the Midi drivers time to drain their output queues
1102          */
1103
1104         n = 1;
1105
1106         while (!signal_pending(current) && n)
1107         {
1108                 n = 0;
1109
1110                 for (i = 0; i < max_mididev; i++)
1111                         if (midi_opened[i] && midi_written[i])
1112                                 if (midi_devs[i]->buffer_status != NULL)
1113                                         if (midi_devs[i]->buffer_status(i))
1114                                                 n++;
1115
1116                 /*
1117                  * Let's have a delay
1118                  */
1119
1120                 if (n)
1121                         oss_broken_sleep_on(&seq_sleeper, HZ/10);
1122         }
1123 }
1124
1125 void sequencer_release(int dev, struct file *file)
1126 {
1127         int i;
1128         int mode = translate_mode(file);
1129
1130         dev = dev >> 4;
1131
1132         /*
1133          * Wait until the queue is empty (if we don't have nonblock)
1134          */
1135
1136         if (mode != OPEN_READ && !(file->f_flags & O_NONBLOCK))
1137         {
1138                 while (!signal_pending(current) && qlen > 0)
1139                 {
1140                         seq_sync();
1141                         oss_broken_sleep_on(&seq_sleeper, 3*HZ);
1142                         /* Extra delay */
1143                 }
1144         }
1145
1146         if (mode != OPEN_READ)
1147                 seq_drain_midi_queues();        /*
1148                                                  * Ensure the output queues are empty
1149                                                  */
1150         seq_reset();
1151         if (mode != OPEN_READ)
1152                 seq_drain_midi_queues();        /*
1153                                                  * Flush the all notes off messages
1154                                                  */
1155
1156         for (i = 0; i < max_synthdev; i++)
1157         {
1158                 if (synth_open_mask & (1 << i)) /*
1159                                                  * Actually opened
1160                                                  */
1161                         if (synth_devs[i])
1162                         {
1163                                 synth_devs[i]->close(i);
1164
1165                                 module_put(synth_devs[i]->owner);
1166
1167                                 if (synth_devs[i]->midi_dev)
1168                                         midi_opened[synth_devs[i]->midi_dev] = 0;
1169                         }
1170         }
1171
1172         for (i = 0; i < max_mididev; i++)
1173         {
1174                 if (midi_opened[i]) {
1175                         midi_devs[i]->close(i);
1176                         module_put(midi_devs[i]->owner);
1177                 }
1178         }
1179
1180         if (seq_mode == SEQ_2) {
1181                 tmr->close(tmr_no);
1182                 module_put(tmr->owner);
1183         }
1184
1185         if (obsolete_api_used)
1186                 printk(KERN_WARNING "/dev/music: Obsolete (4 byte) API was used by %s\n", current->comm);
1187         sequencer_busy = 0;
1188 }
1189
1190 static int seq_sync(void)
1191 {
1192         if (qlen && !seq_playing && !signal_pending(current))
1193                 seq_startplay();
1194
1195         if (qlen > 0)
1196                 oss_broken_sleep_on(&seq_sleeper, HZ);
1197         return qlen;
1198 }
1199
1200 static void midi_outc(int dev, unsigned char data)
1201 {
1202         /*
1203          * NOTE! Calls sleep(). Don't call this from interrupt.
1204          */
1205
1206         int n;
1207         unsigned long flags;
1208
1209         /*
1210          * This routine sends one byte to the Midi channel.
1211          * If the output FIFO is full, it waits until there
1212          * is space in the queue
1213          */
1214
1215         n = 3 * HZ;             /* Timeout */
1216
1217         spin_lock_irqsave(&lock,flags);
1218         while (n && !midi_devs[dev]->outputc(dev, data)) {
1219                 oss_broken_sleep_on(&seq_sleeper, HZ/25);
1220                 n--;
1221         }
1222         spin_unlock_irqrestore(&lock,flags);
1223 }
1224
1225 static void seq_reset(void)
1226 {
1227         /*
1228          * NOTE! Calls sleep(). Don't call this from interrupt.
1229          */
1230
1231         int i;
1232         int chn;
1233         unsigned long flags;
1234
1235         sound_stop_timer();
1236
1237         seq_time = jiffies;
1238         prev_input_time = 0;
1239         prev_event_time = 0;
1240
1241         qlen = qhead = qtail = 0;
1242         iqlen = iqhead = iqtail = 0;
1243
1244         for (i = 0; i < max_synthdev; i++)
1245                 if (synth_open_mask & (1 << i))
1246                         if (synth_devs[i])
1247                                 synth_devs[i]->reset(i);
1248
1249         if (seq_mode == SEQ_2)
1250         {
1251                 for (chn = 0; chn < 16; chn++)
1252                         for (i = 0; i < max_synthdev; i++)
1253                                 if (synth_open_mask & (1 << i))
1254                                         if (synth_devs[i])
1255                                         {
1256                                                 synth_devs[i]->controller(i, chn, 123, 0);      /* All notes off */
1257                                                 synth_devs[i]->controller(i, chn, 121, 0);      /* Reset all ctl */
1258                                                 synth_devs[i]->bender(i, chn, 1 << 13); /* Bender off */
1259                                         }
1260         }
1261         else    /* seq_mode == SEQ_1 */
1262         {
1263                 for (i = 0; i < max_mididev; i++)
1264                         if (midi_written[i])    /*
1265                                                  * Midi used. Some notes may still be playing
1266                                                  */
1267                         {
1268                                 /*
1269                                  *      Sending just a ACTIVE SENSING message should be enough to stop all
1270                                  *      playing notes. Since there are devices not recognizing the
1271                                  *      active sensing, we have to send some all notes off messages also.
1272                                  */
1273                                 midi_outc(i, 0xfe);
1274
1275                                 for (chn = 0; chn < 16; chn++)
1276                                 {
1277                                         midi_outc(i, (unsigned char) (0xb0 + (chn & 0x0f)));            /* control change */
1278                                         midi_outc(i, 0x7b);     /* All notes off */
1279                                         midi_outc(i, 0);        /* Dummy parameter */
1280                                 }
1281
1282                                 midi_devs[i]->close(i);
1283
1284                                 midi_written[i] = 0;
1285                                 midi_opened[i] = 0;
1286                         }
1287         }
1288
1289         seq_playing = 0;
1290
1291         spin_lock_irqsave(&lock,flags);
1292
1293         if (waitqueue_active(&seq_sleeper)) {
1294                 /*      printk( "Sequencer Warning: Unexpected sleeping process - Waking up\n"); */
1295                 wake_up(&seq_sleeper);
1296         }
1297         spin_unlock_irqrestore(&lock,flags);
1298 }
1299
1300 static void seq_panic(void)
1301 {
1302         /*
1303          * This routine is called by the application in case the user
1304          * wants to reset the system to the default state.
1305          */
1306
1307         seq_reset();
1308
1309         /*
1310          * Since some of the devices don't recognize the active sensing and
1311          * all notes off messages, we have to shut all notes manually.
1312          *
1313          *      TO BE IMPLEMENTED LATER
1314          */
1315
1316         /*
1317          * Also return the controllers to their default states
1318          */
1319 }
1320
1321 int sequencer_ioctl(int dev, struct file *file, unsigned int cmd, void __user *arg)
1322 {
1323         int midi_dev, orig_dev, val, err;
1324         int mode = translate_mode(file);
1325         struct synth_info inf;
1326         struct seq_event_rec event_rec;
1327         unsigned long flags;
1328         int __user *p = arg;
1329
1330         orig_dev = dev = dev >> 4;
1331
1332         switch (cmd)
1333         {
1334                 case SNDCTL_TMR_TIMEBASE:
1335                 case SNDCTL_TMR_TEMPO:
1336                 case SNDCTL_TMR_START:
1337                 case SNDCTL_TMR_STOP:
1338                 case SNDCTL_TMR_CONTINUE:
1339                 case SNDCTL_TMR_METRONOME:
1340                 case SNDCTL_TMR_SOURCE:
1341                         if (seq_mode != SEQ_2)
1342                                 return -EINVAL;
1343                         return tmr->ioctl(tmr_no, cmd, arg);
1344
1345                 case SNDCTL_TMR_SELECT:
1346                         if (seq_mode != SEQ_2)
1347                                 return -EINVAL;
1348                         if (get_user(pending_timer, p))
1349                                 return -EFAULT;
1350                         if (pending_timer < 0 || pending_timer >= num_sound_timers || sound_timer_devs[pending_timer] == NULL)
1351                         {
1352                                 pending_timer = -1;
1353                                 return -EINVAL;
1354                         }
1355                         val = pending_timer;
1356                         break;
1357
1358                 case SNDCTL_SEQ_PANIC:
1359                         seq_panic();
1360                         return -EINVAL;
1361
1362                 case SNDCTL_SEQ_SYNC:
1363                         if (mode == OPEN_READ)
1364                                 return 0;
1365                         while (qlen > 0 && !signal_pending(current))
1366                                 seq_sync();
1367                         return qlen ? -EINTR : 0;
1368
1369                 case SNDCTL_SEQ_RESET:
1370                         seq_reset();
1371                         return 0;
1372
1373                 case SNDCTL_SEQ_TESTMIDI:
1374                         if (__get_user(midi_dev, p))
1375                                 return -EFAULT;
1376                         if (midi_dev < 0 || midi_dev >= max_mididev || !midi_devs[midi_dev])
1377                                 return -ENXIO;
1378
1379                         if (!midi_opened[midi_dev] &&
1380                                 (err = midi_devs[midi_dev]->open(midi_dev, mode, sequencer_midi_input,
1381                                                      sequencer_midi_output)) < 0)
1382                                 return err;
1383                         midi_opened[midi_dev] = 1;
1384                         return 0;
1385
1386                 case SNDCTL_SEQ_GETINCOUNT:
1387                         if (mode == OPEN_WRITE)
1388                                 return 0;
1389                         val = iqlen;
1390                         break;
1391
1392                 case SNDCTL_SEQ_GETOUTCOUNT:
1393                         if (mode == OPEN_READ)
1394                                 return 0;
1395                         val = SEQ_MAX_QUEUE - qlen;
1396                         break;
1397
1398                 case SNDCTL_SEQ_GETTIME:
1399                         if (seq_mode == SEQ_2)
1400                                 return tmr->ioctl(tmr_no, cmd, arg);
1401                         val = jiffies - seq_time;
1402                         break;
1403
1404                 case SNDCTL_SEQ_CTRLRATE:
1405                         /*
1406                          * If *arg == 0, just return the current rate
1407                          */
1408                         if (seq_mode == SEQ_2)
1409                                 return tmr->ioctl(tmr_no, cmd, arg);
1410
1411                         if (get_user(val, p))
1412                                 return -EFAULT;
1413                         if (val != 0)
1414                                 return -EINVAL;
1415                         val = HZ;
1416                         break;
1417
1418                 case SNDCTL_SEQ_RESETSAMPLES:
1419                 case SNDCTL_SYNTH_REMOVESAMPLE:
1420                 case SNDCTL_SYNTH_CONTROL:
1421                         if (get_user(dev, p))
1422                                 return -EFAULT;
1423                         if (dev < 0 || dev >= num_synths || synth_devs[dev] == NULL)
1424                                 return -ENXIO;
1425                         if (!(synth_open_mask & (1 << dev)) && !orig_dev)
1426                                 return -EBUSY;
1427                         return synth_devs[dev]->ioctl(dev, cmd, arg);
1428
1429                 case SNDCTL_SEQ_NRSYNTHS:
1430                         val = max_synthdev;
1431                         break;
1432
1433                 case SNDCTL_SEQ_NRMIDIS:
1434                         val = max_mididev;
1435                         break;
1436
1437                 case SNDCTL_SYNTH_MEMAVL:
1438                         if (get_user(dev, p))
1439                                 return -EFAULT;
1440                         if (dev < 0 || dev >= num_synths || synth_devs[dev] == NULL)
1441                                 return -ENXIO;
1442                         if (!(synth_open_mask & (1 << dev)) && !orig_dev)
1443                                 return -EBUSY;
1444                         val = synth_devs[dev]->ioctl(dev, cmd, arg);
1445                         break;
1446
1447                 case SNDCTL_FM_4OP_ENABLE:
1448                         if (get_user(dev, p))
1449                                 return -EFAULT;
1450                         if (dev < 0 || dev >= num_synths || synth_devs[dev] == NULL)
1451                                 return -ENXIO;
1452                         if (!(synth_open_mask & (1 << dev)))
1453                                 return -ENXIO;
1454                         synth_devs[dev]->ioctl(dev, cmd, arg);
1455                         return 0;
1456
1457                 case SNDCTL_SYNTH_INFO:
1458                         if (get_user(dev, &((struct synth_info __user *)arg)->device))
1459                                 return -EFAULT;
1460                         if (dev < 0 || dev >= max_synthdev)
1461                                 return -ENXIO;
1462                         if (!(synth_open_mask & (1 << dev)) && !orig_dev)
1463                                 return -EBUSY;
1464                         return synth_devs[dev]->ioctl(dev, cmd, arg);
1465
1466                 /* Like SYNTH_INFO but returns ID in the name field */
1467                 case SNDCTL_SYNTH_ID:
1468                         if (get_user(dev, &((struct synth_info __user *)arg)->device))
1469                                 return -EFAULT;
1470                         if (dev < 0 || dev >= max_synthdev)
1471                                 return -ENXIO;
1472                         if (!(synth_open_mask & (1 << dev)) && !orig_dev)
1473                                 return -EBUSY;
1474                         memcpy(&inf, synth_devs[dev]->info, sizeof(inf));
1475                         strlcpy(inf.name, synth_devs[dev]->id, sizeof(inf.name));
1476                         inf.device = dev;
1477                         return copy_to_user(arg, &inf, sizeof(inf))?-EFAULT:0;
1478
1479                 case SNDCTL_SEQ_OUTOFBAND:
1480                         if (copy_from_user(&event_rec, arg, sizeof(event_rec)))
1481                                 return -EFAULT;
1482                         spin_lock_irqsave(&lock,flags);
1483                         play_event(event_rec.arr);
1484                         spin_unlock_irqrestore(&lock,flags);
1485                         return 0;
1486
1487                 case SNDCTL_MIDI_INFO:
1488                         if (get_user(dev, &((struct midi_info __user *)arg)->device))
1489                                 return -EFAULT;
1490                         if (dev < 0 || dev >= max_mididev || !midi_devs[dev])
1491                                 return -ENXIO;
1492                         midi_devs[dev]->info.device = dev;
1493                         return copy_to_user(arg, &midi_devs[dev]->info, sizeof(struct midi_info))?-EFAULT:0;
1494
1495                 case SNDCTL_SEQ_THRESHOLD:
1496                         if (get_user(val, p))
1497                                 return -EFAULT;
1498                         if (val < 1)
1499                                 val = 1;
1500                         if (val >= SEQ_MAX_QUEUE)
1501                                 val = SEQ_MAX_QUEUE - 1;
1502                         output_threshold = val;
1503                         return 0;
1504
1505                 case SNDCTL_MIDI_PRETIME:
1506                         if (get_user(val, p))
1507                                 return -EFAULT;
1508                         if (val < 0)
1509                                 val = 0;
1510                         val = (HZ * val) / 10;
1511                         pre_event_timeout = val;
1512                         break;
1513
1514                 default:
1515                         if (mode == OPEN_READ)
1516                                 return -EIO;
1517                         if (!synth_devs[0])
1518                                 return -ENXIO;
1519                         if (!(synth_open_mask & (1 << 0)))
1520                                 return -ENXIO;
1521                         if (!synth_devs[0]->ioctl)
1522                                 return -EINVAL;
1523                         return synth_devs[0]->ioctl(0, cmd, arg);
1524         }
1525         return put_user(val, p);
1526 }
1527
1528 /* No kernel lock - we're using the global irq lock here */
1529 unsigned int sequencer_poll(int dev, struct file *file, poll_table * wait)
1530 {
1531         unsigned long flags;
1532         unsigned int mask = 0;
1533
1534         dev = dev >> 4;
1535
1536         spin_lock_irqsave(&lock,flags);
1537         /* input */
1538         poll_wait(file, &midi_sleeper, wait);
1539         if (iqlen)
1540                 mask |= POLLIN | POLLRDNORM;
1541
1542         /* output */
1543         poll_wait(file, &seq_sleeper, wait);
1544         if ((SEQ_MAX_QUEUE - qlen) >= output_threshold)
1545                 mask |= POLLOUT | POLLWRNORM;
1546         spin_unlock_irqrestore(&lock,flags);
1547         return mask;
1548 }
1549
1550
1551 void sequencer_timer(unsigned long dummy)
1552 {
1553         seq_startplay();
1554 }
1555 EXPORT_SYMBOL(sequencer_timer);
1556
1557 int note_to_freq(int note_num)
1558 {
1559
1560         /*
1561          * This routine converts a midi note to a frequency (multiplied by 1000)
1562          */
1563
1564         int note, octave, note_freq;
1565         static int notes[] =
1566         {
1567                 261632, 277189, 293671, 311132, 329632, 349232,
1568                 369998, 391998, 415306, 440000, 466162, 493880
1569         };
1570
1571 #define BASE_OCTAVE     5
1572
1573         octave = note_num / 12;
1574         note = note_num % 12;
1575
1576         note_freq = notes[note];
1577
1578         if (octave < BASE_OCTAVE)
1579                 note_freq >>= (BASE_OCTAVE - octave);
1580         else if (octave > BASE_OCTAVE)
1581                 note_freq <<= (octave - BASE_OCTAVE);
1582
1583         /*
1584          * note_freq >>= 1;
1585          */
1586
1587         return note_freq;
1588 }
1589 EXPORT_SYMBOL(note_to_freq);
1590
1591 unsigned long compute_finetune(unsigned long base_freq, int bend, int range,
1592                  int vibrato_cents)
1593 {
1594         unsigned long amount;
1595         int negative, semitones, cents, multiplier = 1;
1596
1597         if (!bend)
1598                 return base_freq;
1599         if (!range)
1600                 return base_freq;
1601
1602         if (!base_freq)
1603                 return base_freq;
1604
1605         if (range >= 8192)
1606                 range = 8192;
1607
1608         bend = bend * range / 8192;     /* Convert to cents */
1609         bend += vibrato_cents;
1610
1611         if (!bend)
1612                 return base_freq;
1613
1614         negative = bend < 0 ? 1 : 0;
1615
1616         if (bend < 0)
1617                 bend *= -1;
1618         if (bend > range)
1619                 bend = range;
1620
1621         /*
1622            if (bend > 2399)
1623            bend = 2399;
1624          */
1625         while (bend > 2399)
1626         {
1627                 multiplier *= 4;
1628                 bend -= 2400;
1629         }
1630
1631         semitones = bend / 100;
1632         cents = bend % 100;
1633
1634         amount = (int) (semitone_tuning[semitones] * multiplier * cent_tuning[cents]) / 10000;
1635
1636         if (negative)
1637                 return (base_freq * 10000) / amount;    /* Bend down */
1638         else
1639                 return (base_freq * amount) / 10000;    /* Bend up */
1640 }
1641 EXPORT_SYMBOL(compute_finetune);
1642
1643 void sequencer_init(void)
1644 {
1645         if (sequencer_ok)
1646                 return;
1647         queue = vmalloc(SEQ_MAX_QUEUE * EV_SZ);
1648         if (queue == NULL)
1649         {
1650                 printk(KERN_ERR "sequencer: Can't allocate memory for sequencer output queue\n");
1651                 return;
1652         }
1653         iqueue = vmalloc(SEQ_MAX_QUEUE * IEV_SZ);
1654         if (iqueue == NULL)
1655         {
1656                 printk(KERN_ERR "sequencer: Can't allocate memory for sequencer input queue\n");
1657                 vfree(queue);
1658                 return;
1659         }
1660         sequencer_ok = 1;
1661 }
1662 EXPORT_SYMBOL(sequencer_init);
1663
1664 void sequencer_unload(void)
1665 {
1666         vfree(queue);
1667         vfree(iqueue);
1668         queue = iqueue = NULL;
1669 }