git.oblomov.eu Git - linux-2.6/blob - 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
  23 static int      sequencer_ok;
  24 static struct sound_timer_operations *tmr;
  25 static int      tmr_no = -1;    /* Currently selected timer */
  26 static int      pending_timer = -1;     /* For timer change operation */
  27 extern unsigned long seq_time;
  28
  29 static int      obsolete_api_used;
  30 static DEFINE_SPINLOCK(lock);
  31
  32 /*
  33  * Local counts for number of synth and MIDI devices. These are initialized
  34  * by the sequencer_open.
  35  */
  36 static int      max_mididev;
  37 static int      max_synthdev;
  38
  39 /*
  40  * The seq_mode gives the operating mode of the sequencer:
  41  *      1 = level1 (the default)
  42  *      2 = level2 (extended capabilities)
  43  */
  44
  45 #define SEQ_1   1
  46 #define SEQ_2   2
  47 static int      seq_mode = SEQ_1;
  48
  49 static DECLARE_WAIT_QUEUE_HEAD(seq_sleeper);
  50 static DECLARE_WAIT_QUEUE_HEAD(midi_sleeper);
  51
  52 static int      midi_opened[MAX_MIDI_DEV];
  53
  54 static int      midi_written[MAX_MIDI_DEV];
  55
  56 static unsigned long prev_input_time;
  57 static int      prev_event_time;
  58
  59 #include "tuning.h"
  60
  61 #define EV_SZ   8
  62 #define IEV_SZ  8
  63
  64 static unsigned char *queue;
  65 static unsigned char *iqueue;
  66
  67 static volatile int qhead, qtail, qlen;
  68 static volatile int iqhead, iqtail, iqlen;
  69 static volatile int seq_playing;
  70 static volatile int sequencer_busy;
  71 static int      output_threshold;
  72 static long     pre_event_timeout;
  73 static unsigned synth_open_mask;
  74
  75 static int      seq_queue(unsigned char *note, char nonblock);
  76 static void     seq_startplay(void);
  77 static int      seq_sync(void);
  78 static void     seq_reset(void);
  79
  80 #if MAX_SYNTH_DEV > 15
  81 #error Too many synthesizer devices enabled.
  82 #endif
  83
  84 int sequencer_read(int dev, struct file *file, char __user *buf, int count)
  85 {
  86         int c = count, p = 0;
  87         int ev_len;
  88         unsigned long flags;
  89
  90         dev = dev >> 4;
  91
  92         ev_len = seq_mode == SEQ_1 ? 4 : 8;
  93
  94         spin_lock_irqsave(&lock,flags);
  95
  96         if (!iqlen)
  97         {
  98                 spin_unlock_irqrestore(&lock,flags);
  99                 if (file->f_flags & O_NONBLOCK) {
 100                         return -EAGAIN;
 101                 }
 102
 103                 interruptible_sleep_on_timeout(&midi_sleeper,
 104                                                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 err;
 216         int mode = translate_mode(file);
 217
 218         dev = dev >> 4;
 219
 220         DEB(printk("sequencer_write(dev=%d, count=%d)\n", dev, count));
 221
 222         if (mode == OPEN_READ)
 223                 return -EIO;
 224
 225         c = count;
 226
 227         while (c >= 4)
 228         {
 229                 if (copy_from_user((char *) event_rec, &(buf)[p], 4))
 230                         goto out;
 231                 ev_code = event_rec[0];
 232
 233                 if (ev_code == SEQ_FULLSIZE)
 234                 {
 235                         int err, fmt;
 236
 237                         dev = *(unsigned short *) &event_rec[2];
 238                         if (dev < 0 || dev >= max_synthdev || synth_devs[dev] == NULL)
 239                                 return -ENXIO;
 240
 241                         if (!(synth_open_mask & (1 << dev)))
 242                                 return -ENXIO;
 243
 244                         fmt = (*(short *) &event_rec[0]) & 0xffff;
 245                         err = synth_devs[dev]->load_patch(dev, fmt, buf, p + 4, c, 0);
 246                         if (err < 0)
 247                                 return err;
 248
 249                         return err;
 250                 }
 251                 if (ev_code >= 128)
 252                 {
 253                         if (seq_mode == SEQ_2 && ev_code == SEQ_EXTENDED)
 254                         {
 255                                 printk(KERN_WARNING "Sequencer: Invalid level 2 event %x\n", ev_code);
 256                                 return -EINVAL;
 257                         }
 258                         ev_size = 8;
 259
 260                         if (c < ev_size)
 261                         {
 262                                 if (!seq_playing)
 263                                         seq_startplay();
 264                                 return count - c;
 265                         }
 266                         if (copy_from_user((char *)&event_rec[4],
 267                                            &(buf)[p + 4], 4))
 268                                 goto out;
 269
 270                 }
 271                 else
 272                 {
 273                         if (seq_mode == SEQ_2)
 274                         {
 275                                 printk(KERN_WARNING "Sequencer: 4 byte event in level 2 mode\n");
 276                                 return -EINVAL;
 277                         }
 278                         ev_size = 4;
 279
 280                         if (event_rec[0] != SEQ_MIDIPUTC)
 281                                 obsolete_api_used = 1;
 282                 }
 283
 284                 if (event_rec[0] == SEQ_MIDIPUTC)
 285                 {
 286                         if (!midi_opened[event_rec[2]])
 287                         {
 288                                 int mode;
 289                                 int dev = event_rec[2];
 290
 291                                 if (dev >= max_mididev || midi_devs[dev]==NULL)
 292                                 {
 293                                         /*printk("Sequencer Error: Nonexistent MIDI device %d\n", dev);*/
 294                                         return -ENXIO;
 295                                 }
 296                                 mode = translate_mode(file);
 297
 298                                 if ((err = midi_devs[dev]->open(dev, mode,
 299                                                                 sequencer_midi_input, sequencer_midi_output)) < 0)
 300                                 {
 301                                         seq_reset();
 302                                         printk(KERN_WARNING "Sequencer Error: Unable to open Midi #%d\n", dev);
 303                                         return err;
 304                                 }
 305                                 midi_opened[dev] = 1;
 306                         }
 307                 }
 308                 if (!seq_queue(event_rec, (file->f_flags & (O_NONBLOCK) ? 1 : 0)))
 309                 {
 310                         int processed = count - c;
 311
 312                         if (!seq_playing)
 313                                 seq_startplay();
 314
 315                         if (!processed && (file->f_flags & O_NONBLOCK))
 316                                 return -EAGAIN;
 317                         else
 318                                 return processed;
 319                 }
 320                 p += ev_size;
 321                 c -= ev_size;
 322         }
 323
 324         if (!seq_playing)
 325                 seq_startplay();
 326 out:
 327         return count;
 328 }
 329
 330 static int seq_queue(unsigned char *note, char nonblock)
 331 {
 332
 333         /*
 334          * Test if there is space in the queue
 335          */
 336
 337         if (qlen >= SEQ_MAX_QUEUE)
 338                 if (!seq_playing)
 339                         seq_startplay();        /*
 340                                                  * Give chance to drain the queue
 341                                                  */
 342
 343         if (!nonblock && qlen >= SEQ_MAX_QUEUE && !waitqueue_active(&seq_sleeper)) {
 344                 /*
 345                  * Sleep until there is enough space on the queue
 346                  */
 347                 interruptible_sleep_on(&seq_sleeper);
 348         }
 349         if (qlen >= SEQ_MAX_QUEUE)
 350         {
 351                 return 0;       /*
 352                                  * To be sure
 353                                  */
 354         }
 355         memcpy(&queue[qtail * EV_SZ], note, EV_SZ);
 356
 357         qtail = (qtail + 1) % SEQ_MAX_QUEUE;
 358         qlen++;
 359
 360         return 1;
 361 }
 362
 363 static int extended_event(unsigned char *q)
 364 {
 365         int dev = q[2];
 366
 367         if (dev < 0 || dev >= max_synthdev)
 368                 return -ENXIO;
 369
 370         if (!(synth_open_mask & (1 << dev)))
 371                 return -ENXIO;
 372
 373         switch (q[1])
 374         {
 375                 case SEQ_NOTEOFF:
 376                         synth_devs[dev]->kill_note(dev, q[3], q[4], q[5]);
 377                         break;
 378
 379                 case SEQ_NOTEON:
 380                         if (q[4] > 127 && q[4] != 255)
 381                                 return 0;
 382
 383                         if (q[5] == 0)
 384                         {
 385                                 synth_devs[dev]->kill_note(dev, q[3], q[4], q[5]);
 386                                 break;
 387                         }
 388                         synth_devs[dev]->start_note(dev, q[3], q[4], q[5]);
 389                         break;
 390
 391                 case SEQ_PGMCHANGE:
 392                         synth_devs[dev]->set_instr(dev, q[3], q[4]);
 393                         break;
 394
 395                 case SEQ_AFTERTOUCH:
 396                         synth_devs[dev]->aftertouch(dev, q[3], q[4]);
 397                         break;
 398
 399                 case SEQ_BALANCE:
 400                         synth_devs[dev]->panning(dev, q[3], (char) q[4]);
 401                         break;
 402
 403                 case SEQ_CONTROLLER:
 404                         synth_devs[dev]->controller(dev, q[3], q[4], (short) (q[5] | (q[6] << 8)));
 405                         break;
 406
 407                 case SEQ_VOLMODE:
 408                         if (synth_devs[dev]->volume_method != NULL)
 409                                 synth_devs[dev]->volume_method(dev, q[3]);
 410                         break;
 411
 412                 default:
 413                         return -EINVAL;
 414         }
 415         return 0;
 416 }
 417
 418 static int find_voice(int dev, int chn, int note)
 419 {
 420         unsigned short key;
 421         int i;
 422
 423         key = (chn << 8) | (note + 1);
 424         for (i = 0; i < synth_devs[dev]->alloc.max_voice; i++)
 425                 if (synth_devs[dev]->alloc.map[i] == key)
 426                         return i;
 427         return -1;
 428 }
 429
 430 static int alloc_voice(int dev, int chn, int note)
 431 {
 432         unsigned short  key;
 433         int voice;
 434
 435         key = (chn << 8) | (note + 1);
 436
 437         voice = synth_devs[dev]->alloc_voice(dev, chn, note,
 438                                              &synth_devs[dev]->alloc);
 439         synth_devs[dev]->alloc.map[voice] = key;
 440         synth_devs[dev]->alloc.alloc_times[voice] =
 441                         synth_devs[dev]->alloc.timestamp++;
 442         return voice;
 443 }
 444
 445 static void seq_chn_voice_event(unsigned char *event_rec)
 446 {
 447 #define dev event_rec[1]
 448 #define cmd event_rec[2]
 449 #define chn event_rec[3]
 450 #define note event_rec[4]
 451 #define parm event_rec[5]
 452
 453         int voice = -1;
 454
 455         if ((int) dev > max_synthdev || synth_devs[dev] == NULL)
 456                 return;
 457         if (!(synth_open_mask & (1 << dev)))
 458                 return;
 459         if (!synth_devs[dev])
 460                 return;
 461
 462         if (seq_mode == SEQ_2)
 463         {
 464                 if (synth_devs[dev]->alloc_voice)
 465                         voice = find_voice(dev, chn, note);
 466
 467                 if (cmd == MIDI_NOTEON && parm == 0)
 468                 {
 469                         cmd = MIDI_NOTEOFF;
 470                         parm = 64;
 471                 }
 472         }
 473
 474         switch (cmd)
 475         {
 476                 case MIDI_NOTEON:
 477                         if (note > 127 && note != 255)  /* Not a seq2 feature */
 478                                 return;
 479
 480                         if (voice == -1 && seq_mode == SEQ_2 && synth_devs[dev]->alloc_voice)
 481                         {
 482                                 /* Internal synthesizer (FM, GUS, etc) */
 483                                 voice = alloc_voice(dev, chn, note);
 484                         }
 485                         if (voice == -1)
 486                                 voice = chn;
 487
 488                         if (seq_mode == SEQ_2 && (int) dev < num_synths)
 489                         {
 490                                 /*
 491                                  * The MIDI channel 10 is a percussive channel. Use the note
 492                                  * number to select the proper patch (128 to 255) to play.
 493                                  */
 494
 495                                 if (chn == 9)
 496                                 {
 497                                         synth_devs[dev]->set_instr(dev, voice, 128 + note);
 498                                         synth_devs[dev]->chn_info[chn].pgm_num = 128 + note;
 499                                 }
 500                                 synth_devs[dev]->setup_voice(dev, voice, chn);
 501                         }
 502                         synth_devs[dev]->start_note(dev, voice, note, parm);
 503                         break;
 504
 505                 case MIDI_NOTEOFF:
 506                         if (voice == -1)
 507                                 voice = chn;
 508                         synth_devs[dev]->kill_note(dev, voice, note, parm);
 509                         break;
 510
 511                 case MIDI_KEY_PRESSURE:
 512                         if (voice == -1)
 513                                 voice = chn;
 514                         synth_devs[dev]->aftertouch(dev, voice, parm);
 515                         break;
 516
 517                 default:;
 518         }
 519 #undef dev
 520 #undef cmd
 521 #undef chn
 522 #undef note
 523 #undef parm
 524 }
 525
 526
 527 static void seq_chn_common_event(unsigned char *event_rec)
 528 {
 529         unsigned char dev = event_rec[1];
 530         unsigned char cmd = event_rec[2];
 531         unsigned char chn = event_rec[3];
 532         unsigned char p1 = event_rec[4];
 533
 534         /* unsigned char p2 = event_rec[5]; */
 535         unsigned short w14 = *(short *) &event_rec[6];
 536
 537         if ((int) dev > max_synthdev || synth_devs[dev] == NULL)
 538                 return;
 539         if (!(synth_open_mask & (1 << dev)))
 540                 return;
 541         if (!synth_devs[dev])
 542                 return;
 543
 544         switch (cmd)
 545         {
 546                 case MIDI_PGM_CHANGE:
 547                         if (seq_mode == SEQ_2)
 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                                 synth_devs[dev]->chn_info[chn].bender_value = w14;
 601
 602                                 if ((int) dev < num_synths)
 603                                 {
 604                                         /* Handle all playing notes on this channel */
 605                                         int i, key;
 606
 607                                         key = (chn << 8);
 608
 609                                         for (i = 0; i < synth_devs[dev]->alloc.max_voice; i++)
 610                                                 if ((synth_devs[dev]->alloc.map[i] & 0xff00) == key)
 611                                                         synth_devs[dev]->bender(dev, i, w14);
 612                                 }
 613                                 else
 614                                         synth_devs[dev]->bender(dev, chn, w14);
 615                         }
 616                         else    /* MODE 1 */
 617                                 synth_devs[dev]->bender(dev, chn, w14);
 618                         break;
 619
 620                 default:;
 621         }
 622 }
 623
 624 static int seq_timing_event(unsigned char *event_rec)
 625 {
 626         unsigned char cmd = event_rec[1];
 627         unsigned int parm = *(int *) &event_rec[4];
 628
 629         if (seq_mode == SEQ_2)
 630         {
 631                 int ret;
 632
 633                 if ((ret = tmr->event(tmr_no, event_rec)) == TIMER_ARMED)
 634                         if ((SEQ_MAX_QUEUE - qlen) >= output_threshold)
 635                                 wake_up(&seq_sleeper);
 636                 return ret;
 637         }
 638         switch (cmd)
 639         {
 640                 case TMR_WAIT_REL:
 641                         parm += prev_event_time;
 642
 643                         /*
 644                          * NOTE!  No break here. Execution of TMR_WAIT_REL continues in the
 645                          * next case (TMR_WAIT_ABS)
 646                          */
 647
 648                 case TMR_WAIT_ABS:
 649                         if (parm > 0)
 650                         {
 651                                 long time;
 652
 653                                 time = parm;
 654                                 prev_event_time = time;
 655
 656                                 seq_playing = 1;
 657                                 request_sound_timer(time);
 658
 659                                 if ((SEQ_MAX_QUEUE - qlen) >= output_threshold)
 660                                         wake_up(&seq_sleeper);
 661                                 return TIMER_ARMED;
 662                         }
 663                         break;
 664
 665                 case TMR_START:
 666                         seq_time = jiffies;
 667                         prev_input_time = 0;
 668                         prev_event_time = 0;
 669                         break;
 670
 671                 case TMR_STOP:
 672                         break;
 673
 674                 case TMR_CONTINUE:
 675                         break;
 676
 677                 case TMR_TEMPO:
 678                         break;
 679
 680                 case TMR_ECHO:
 681                         if (seq_mode == SEQ_2)
 682                                 seq_copy_to_input(event_rec, 8);
 683                         else
 684                         {
 685                                 parm = (parm << 8 | SEQ_ECHO);
 686                                 seq_copy_to_input((unsigned char *) &parm, 4);
 687                         }
 688                         break;
 689
 690                 default:;
 691         }
 692
 693         return TIMER_NOT_ARMED;
 694 }
 695
 696 static void seq_local_event(unsigned char *event_rec)
 697 {
 698         unsigned char   cmd = event_rec[1];
 699         unsigned int    parm = *((unsigned int *) &event_rec[4]);
 700
 701         switch (cmd)
 702         {
 703                 case LOCL_STARTAUDIO:
 704                         DMAbuf_start_devices(parm);
 705                         break;
 706
 707                 default:;
 708         }
 709 }
 710
 711 static void seq_sysex_message(unsigned char *event_rec)
 712 {
 713         unsigned int dev = event_rec[1];
 714         int i, l = 0;
 715         unsigned char  *buf = &event_rec[2];
 716
 717         if (dev > max_synthdev)
 718                 return;
 719         if (!(synth_open_mask & (1 << dev)))
 720                 return;
 721         if (!synth_devs[dev])
 722                 return;
 723
 724         l = 0;
 725         for (i = 0; i < 6 && buf[i] != 0xff; i++)
 726                 l = i + 1;
 727
 728         if (!synth_devs[dev]->send_sysex)
 729                 return;
 730         if (l > 0)
 731                 synth_devs[dev]->send_sysex(dev, buf, l);
 732 }
 733
 734 static int play_event(unsigned char *q)
 735 {
 736         /*
 737          * NOTE! This routine returns
 738          *   0 = normal event played.
 739          *   1 = Timer armed. Suspend playback until timer callback.
 740          *   2 = MIDI output buffer full. Restore queue and suspend until timer
 741          */
 742         unsigned int *delay;
 743
 744         switch (q[0])
 745         {
 746                 case SEQ_NOTEOFF:
 747                         if (synth_open_mask & (1 << 0))
 748                                 if (synth_devs[0])
 749                                         synth_devs[0]->kill_note(0, q[1], 255, q[3]);
 750                         break;
 751
 752                 case SEQ_NOTEON:
 753                         if (q[4] < 128 || q[4] == 255)
 754                                 if (synth_open_mask & (1 << 0))
 755                                         if (synth_devs[0])
 756                                                 synth_devs[0]->start_note(0, q[1], q[2], q[3]);
 757                         break;
 758
 759                 case SEQ_WAIT:
 760                         delay = (unsigned int *) q;     /*
 761                                                          * Bytes 1 to 3 are containing the *
 762                                                          * delay in 'ticks'
 763                                                          */
 764                         *delay = (*delay >> 8) & 0xffffff;
 765
 766                         if (*delay > 0)
 767                         {
 768                                 long time;
 769
 770                                 seq_playing = 1;
 771                                 time = *delay;
 772                                 prev_event_time = time;
 773
 774                                 request_sound_timer(time);
 775
 776                                 if ((SEQ_MAX_QUEUE - qlen) >= output_threshold)
 777                                         wake_up(&seq_sleeper);
 778                                 /*
 779                                  * The timer is now active and will reinvoke this function
 780                                  * after the timer expires. Return to the caller now.
 781                                  */
 782                                 return 1;
 783                         }
 784                         break;
 785
 786                 case SEQ_PGMCHANGE:
 787                         if (synth_open_mask & (1 << 0))
 788                                 if (synth_devs[0])
 789                                         synth_devs[0]->set_instr(0, q[1], q[2]);
 790                         break;
 791
 792                 case SEQ_SYNCTIMER:     /*
 793                                          * Reset timer
 794                                          */
 795                         seq_time = jiffies;
 796                         prev_input_time = 0;
 797                         prev_event_time = 0;
 798                         break;
 799
 800                 case SEQ_MIDIPUTC:      /*
 801                                          * Put a midi character
 802                                          */
 803                         if (midi_opened[q[2]])
 804                         {
 805                                 int dev;
 806
 807                                 dev = q[2];
 808
 809                                 if (dev < 0 || dev >= num_midis || midi_devs[dev] == NULL)
 810                                         break;
 811
 812                                 if (!midi_devs[dev]->outputc(dev, q[1]))
 813                                 {
 814                                         /*
 815                                          * Output FIFO is full. Wait one timer cycle and try again.
 816                                          */
 817
 818                                         seq_playing = 1;
 819                                         request_sound_timer(-1);
 820                                         return 2;
 821                                 }
 822                                 else
 823                                         midi_written[dev] = 1;
 824                         }
 825                         break;
 826
 827                 case SEQ_ECHO:
 828                         seq_copy_to_input(q, 4);        /*
 829                                                          * Echo back to the process
 830                                                          */
 831                         break;
 832
 833                 case SEQ_PRIVATE:
 834                         if ((int) q[1] < max_synthdev)
 835                                 synth_devs[q[1]]->hw_control(q[1], q);
 836                         break;
 837
 838                 case SEQ_EXTENDED:
 839                         extended_event(q);
 840                         break;
 841
 842                 case EV_CHN_VOICE:
 843                         seq_chn_voice_event(q);
 844                         break;
 845
 846                 case EV_CHN_COMMON:
 847                         seq_chn_common_event(q);
 848                         break;
 849
 850                 case EV_TIMING:
 851                         if (seq_timing_event(q) == TIMER_ARMED)
 852                         {
 853                                 return 1;
 854                         }
 855                         break;
 856
 857                 case EV_SEQ_LOCAL:
 858                         seq_local_event(q);
 859                         break;
 860
 861                 case EV_SYSEX:
 862                         seq_sysex_message(q);
 863                         break;
 864
 865                 default:;
 866         }
 867         return 0;
 868 }
 869
 870 /* called also as timer in irq context */
 871 static void seq_startplay(void)
 872 {
 873         int this_one, action;
 874         unsigned long flags;
 875
 876         while (qlen > 0)
 877         {
 878
 879                 spin_lock_irqsave(&lock,flags);
 880                 qhead = ((this_one = qhead) + 1) % SEQ_MAX_QUEUE;
 881                 qlen--;
 882                 spin_unlock_irqrestore(&lock,flags);
 883
 884                 seq_playing = 1;
 885
 886                 if ((action = play_event(&queue[this_one * EV_SZ])))
 887                 {               /* Suspend playback. Next timer routine invokes this routine again */
 888                         if (action == 2)
 889                         {
 890                                 qlen++;
 891                                 qhead = this_one;
 892                         }
 893                         return;
 894                 }
 895         }
 896
 897         seq_playing = 0;
 898
 899         if ((SEQ_MAX_QUEUE - qlen) >= output_threshold)
 900                 wake_up(&seq_sleeper);
 901 }
 902
 903 static void reset_controllers(int dev, unsigned char *controller, int update_dev)
 904 {
 905         int i;
 906         for (i = 0; i < 128; i++)
 907                 controller[i] = ctrl_def_values[i];
 908 }
 909
 910 static void setup_mode2(void)
 911 {
 912         int dev;
 913
 914         max_synthdev = num_synths;
 915
 916         for (dev = 0; dev < num_midis; dev++)
 917         {
 918                 if (midi_devs[dev] && midi_devs[dev]->converter != NULL)
 919                 {
 920                         synth_devs[max_synthdev++] = midi_devs[dev]->converter;
 921                 }
 922         }
 923
 924         for (dev = 0; dev < max_synthdev; dev++)
 925         {
 926                 int chn;
 927
 928                 synth_devs[dev]->sysex_ptr = 0;
 929                 synth_devs[dev]->emulation = 0;
 930
 931                 for (chn = 0; chn < 16; chn++)
 932                 {
 933                         synth_devs[dev]->chn_info[chn].pgm_num = 0;
 934                         reset_controllers(dev,
 935                                 synth_devs[dev]->chn_info[chn].controllers,0);
 936                         synth_devs[dev]->chn_info[chn].bender_value = (1 << 7); /* Neutral */
 937                         synth_devs[dev]->chn_info[chn].bender_range = 200;
 938                 }
 939         }
 940         max_mididev = 0;
 941         seq_mode = SEQ_2;
 942 }
 943
 944 int sequencer_open(int dev, struct file *file)
 945 {
 946         int retval, mode, i;
 947         int level, tmp;
 948
 949         if (!sequencer_ok)
 950                 sequencer_init();
 951
 952         level = ((dev & 0x0f) == SND_DEV_SEQ2) ? 2 : 1;
 953
 954         dev = dev >> 4;
 955         mode = translate_mode(file);
 956
 957         DEB(printk("sequencer_open(dev=%d)\n", dev));
 958
 959         if (!sequencer_ok)
 960         {
 961 /*              printk("Sound card: sequencer not initialized\n");*/
 962                 return -ENXIO;
 963         }
 964         if (dev)                /* Patch manager device (obsolete) */
 965                 return -ENXIO;
 966
 967         if(synth_devs[dev] == NULL)
 968                 request_module("synth0");
 969
 970         if (mode == OPEN_READ)
 971         {
 972                 if (!num_midis)
 973                 {
 974                         /*printk("Sequencer: No MIDI devices. Input not possible\n");*/
 975                         sequencer_busy = 0;
 976                         return -ENXIO;
 977                 }
 978         }
 979         if (sequencer_busy)
 980         {
 981                 return -EBUSY;
 982         }
 983         sequencer_busy = 1;
 984         obsolete_api_used = 0;
 985
 986         max_mididev = num_midis;
 987         max_synthdev = num_synths;
 988         pre_event_timeout = MAX_SCHEDULE_TIMEOUT;
 989         seq_mode = SEQ_1;
 990
 991         if (pending_timer != -1)
 992         {
 993                 tmr_no = pending_timer;
 994                 pending_timer = -1;
 995         }
 996         if (tmr_no == -1)       /* Not selected yet */
 997         {
 998                 int i, best;
 999
1000                 best = -1;
1001                 for (i = 0; i < num_sound_timers; i++)
1002                         if (sound_timer_devs[i] && sound_timer_devs[i]->priority > best)
1003                         {
1004                                 tmr_no = i;
1005                                 best = sound_timer_devs[i]->priority;
1006                         }
1007                 if (tmr_no == -1)       /* Should not be */
1008                         tmr_no = 0;
1009         }
1010         tmr = sound_timer_devs[tmr_no];
1011
1012         if (level == 2)
1013         {
1014                 if (tmr == NULL)
1015                 {
1016                         /*printk("sequencer: No timer for level 2\n");*/
1017                         sequencer_busy = 0;
1018                         return -ENXIO;
1019                 }
1020                 setup_mode2();
1021         }
1022         if (!max_synthdev && !max_mididev)
1023         {
1024                 sequencer_busy=0;
1025                 return -ENXIO;
1026         }
1027
1028         synth_open_mask = 0;
1029
1030         for (i = 0; i < max_mididev; i++)
1031         {
1032                 midi_opened[i] = 0;
1033                 midi_written[i] = 0;
1034         }
1035
1036         for (i = 0; i < max_synthdev; i++)
1037         {
1038                 if (synth_devs[i]==NULL)
1039                         continue;
1040
1041                 if (!try_module_get(synth_devs[i]->owner))
1042                         continue;
1043
1044                 if ((tmp = synth_devs[i]->open(i, mode)) < 0)
1045                 {
1046                         printk(KERN_WARNING "Sequencer: Warning! Cannot open synth device #%d (%d)\n", i, tmp);
1047                         if (synth_devs[i]->midi_dev)
1048                                 printk(KERN_WARNING "(Maps to MIDI dev #%d)\n", synth_devs[i]->midi_dev);
1049                 }
1050                 else
1051                 {
1052                         synth_open_mask |= (1 << i);
1053                         if (synth_devs[i]->midi_dev)
1054                                 midi_opened[synth_devs[i]->midi_dev] = 1;
1055                 }
1056         }
1057
1058         seq_time = jiffies;
1059
1060         prev_input_time = 0;
1061         prev_event_time = 0;
1062
1063         if (seq_mode == SEQ_1 && (mode == OPEN_READ || mode == OPEN_READWRITE))
1064         {
1065                 /*
1066                  * Initialize midi input devices
1067                  */
1068
1069                 for (i = 0; i < max_mididev; i++)
1070                         if (!midi_opened[i] && midi_devs[i])
1071                         {
1072                                 if (!try_module_get(midi_devs[i]->owner))
1073                                         continue;
1074
1075                                 if ((retval = midi_devs[i]->open(i, mode,
1076                                         sequencer_midi_input, sequencer_midi_output)) >= 0)
1077                                 {
1078                                         midi_opened[i] = 1;
1079                                 }
1080                         }
1081         }
1082
1083         if (seq_mode == SEQ_2) {
1084                 if (try_module_get(tmr->owner))
1085                         tmr->open(tmr_no, seq_mode);
1086         }
1087
1088         init_waitqueue_head(&seq_sleeper);
1089         init_waitqueue_head(&midi_sleeper);
1090         output_threshold = SEQ_MAX_QUEUE / 2;
1091
1092         return 0;
1093 }
1094
1095 static void seq_drain_midi_queues(void)
1096 {
1097         int i, n;
1098
1099         /*
1100          * Give the Midi drivers time to drain their output queues
1101          */
1102
1103         n = 1;
1104
1105         while (!signal_pending(current) && n)
1106         {
1107                 n = 0;
1108
1109                 for (i = 0; i < max_mididev; i++)
1110                         if (midi_opened[i] && midi_written[i])
1111                                 if (midi_devs[i]->buffer_status != NULL)
1112                                         if (midi_devs[i]->buffer_status(i))
1113                                                 n++;
1114
1115                 /*
1116                  * Let's have a delay
1117                  */
1118
1119                 if (n)
1120                         interruptible_sleep_on_timeout(&seq_sleeper,
1121                                                        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         DEB(printk("sequencer_release(dev=%d)\n", dev));
1133
1134         /*
1135          * Wait until the queue is empty (if we don't have nonblock)
1136          */
1137
1138         if (mode != OPEN_READ && !(file->f_flags & O_NONBLOCK))
1139         {
1140                 while (!signal_pending(current) && qlen > 0)
1141                 {
1142                         seq_sync();
1143                         interruptible_sleep_on_timeout(&seq_sleeper,
1144                                                        3*HZ);
1145                         /* Extra delay */
1146                 }
1147         }
1148
1149         if (mode != OPEN_READ)
1150                 seq_drain_midi_queues();        /*
1151                                                  * Ensure the output queues are empty
1152                                                  */
1153         seq_reset();
1154         if (mode != OPEN_READ)
1155                 seq_drain_midi_queues();        /*
1156                                                  * Flush the all notes off messages
1157                                                  */
1158
1159         for (i = 0; i < max_synthdev; i++)
1160         {
1161                 if (synth_open_mask & (1 << i)) /*
1162                                                  * Actually opened
1163                                                  */
1164                         if (synth_devs[i])
1165                         {
1166                                 synth_devs[i]->close(i);
1167
1168                                 module_put(synth_devs[i]->owner);
1169
1170                                 if (synth_devs[i]->midi_dev)
1171                                         midi_opened[synth_devs[i]->midi_dev] = 0;
1172                         }
1173         }
1174
1175         for (i = 0; i < max_mididev; i++)
1176         {
1177                 if (midi_opened[i]) {
1178                         midi_devs[i]->close(i);
1179                         module_put(midi_devs[i]->owner);
1180                 }
1181         }
1182
1183         if (seq_mode == SEQ_2) {
1184                 tmr->close(tmr_no);
1185                 module_put(tmr->owner);
1186         }
1187
1188         if (obsolete_api_used)
1189                 printk(KERN_WARNING "/dev/music: Obsolete (4 byte) API was used by %s\n", current->comm);
1190         sequencer_busy = 0;
1191 }
1192
1193 static int seq_sync(void)
1194 {
1195         if (qlen && !seq_playing && !signal_pending(current))
1196                 seq_startplay();
1197
1198         if (qlen > 0)
1199                 interruptible_sleep_on_timeout(&seq_sleeper, HZ);
1200         return qlen;
1201 }
1202
1203 static void midi_outc(int dev, unsigned char data)
1204 {
1205         /*
1206          * NOTE! Calls sleep(). Don't call this from interrupt.
1207          */
1208
1209         int n;
1210         unsigned long flags;
1211
1212         /*
1213          * This routine sends one byte to the Midi channel.
1214          * If the output FIFO is full, it waits until there
1215          * is space in the queue
1216          */
1217
1218         n = 3 * HZ;             /* Timeout */
1219
1220         spin_lock_irqsave(&lock,flags);
1221         while (n && !midi_devs[dev]->outputc(dev, data)) {
1222                 interruptible_sleep_on_timeout(&seq_sleeper, HZ/25);
1223                 n--;
1224         }
1225         spin_unlock_irqrestore(&lock,flags);
1226 }
1227
1228 static void seq_reset(void)
1229 {
1230         /*
1231          * NOTE! Calls sleep(). Don't call this from interrupt.
1232          */
1233
1234         int i;
1235         int chn;
1236         unsigned long flags;
1237
1238         sound_stop_timer();
1239
1240         seq_time = jiffies;
1241         prev_input_time = 0;
1242         prev_event_time = 0;
1243
1244         qlen = qhead = qtail = 0;
1245         iqlen = iqhead = iqtail = 0;
1246
1247         for (i = 0; i < max_synthdev; i++)
1248                 if (synth_open_mask & (1 << i))
1249                         if (synth_devs[i])
1250                                 synth_devs[i]->reset(i);
1251
1252         if (seq_mode == SEQ_2)
1253         {
1254                 for (chn = 0; chn < 16; chn++)
1255                         for (i = 0; i < max_synthdev; i++)
1256                                 if (synth_open_mask & (1 << i))
1257                                         if (synth_devs[i])
1258                                         {
1259                                                 synth_devs[i]->controller(i, chn, 123, 0);      /* All notes off */
1260                                                 synth_devs[i]->controller(i, chn, 121, 0);      /* Reset all ctl */
1261                                                 synth_devs[i]->bender(i, chn, 1 << 13); /* Bender off */
1262                                         }
1263         }
1264         else    /* seq_mode == SEQ_1 */
1265         {
1266                 for (i = 0; i < max_mididev; i++)
1267                         if (midi_written[i])    /*
1268                                                  * Midi used. Some notes may still be playing
1269                                                  */
1270                         {
1271                                 /*
1272                                  *      Sending just a ACTIVE SENSING message should be enough to stop all
1273                                  *      playing notes. Since there are devices not recognizing the
1274                                  *      active sensing, we have to send some all notes off messages also.
1275                                  */
1276                                 midi_outc(i, 0xfe);
1277
1278                                 for (chn = 0; chn < 16; chn++)
1279                                 {
1280                                         midi_outc(i, (unsigned char) (0xb0 + (chn & 0x0f)));            /* control change */
1281                                         midi_outc(i, 0x7b);     /* All notes off */
1282                                         midi_outc(i, 0);        /* Dummy parameter */
1283                                 }
1284
1285                                 midi_devs[i]->close(i);
1286
1287                                 midi_written[i] = 0;
1288                                 midi_opened[i] = 0;
1289                         }
1290         }
1291
1292         seq_playing = 0;
1293
1294         spin_lock_irqsave(&lock,flags);
1295
1296         if (waitqueue_active(&seq_sleeper)) {
1297                 /*      printk( "Sequencer Warning: Unexpected sleeping process - Waking up\n"); */
1298                 wake_up(&seq_sleeper);
1299         }
1300         spin_unlock_irqrestore(&lock,flags);
1301 }
1302
1303 static void seq_panic(void)
1304 {
1305         /*
1306          * This routine is called by the application in case the user
1307          * wants to reset the system to the default state.
1308          */
1309
1310         seq_reset();
1311
1312         /*
1313          * Since some of the devices don't recognize the active sensing and
1314          * all notes off messages, we have to shut all notes manually.
1315          *
1316          *      TO BE IMPLEMENTED LATER
1317          */
1318
1319         /*
1320          * Also return the controllers to their default states
1321          */
1322 }
1323
1324 int sequencer_ioctl(int dev, struct file *file, unsigned int cmd, void __user *arg)
1325 {
1326         int midi_dev, orig_dev, val, err;
1327         int mode = translate_mode(file);
1328         struct synth_info inf;
1329         struct seq_event_rec event_rec;
1330         unsigned long flags;
1331         int __user *p = arg;
1332
1333         orig_dev = dev = dev >> 4;
1334
1335         switch (cmd)
1336         {
1337                 case SNDCTL_TMR_TIMEBASE:
1338                 case SNDCTL_TMR_TEMPO:
1339                 case SNDCTL_TMR_START:
1340                 case SNDCTL_TMR_STOP:
1341                 case SNDCTL_TMR_CONTINUE:
1342                 case SNDCTL_TMR_METRONOME:
1343                 case SNDCTL_TMR_SOURCE:
1344                         if (seq_mode != SEQ_2)
1345                                 return -EINVAL;
1346                         return tmr->ioctl(tmr_no, cmd, arg);
1347
1348                 case SNDCTL_TMR_SELECT:
1349                         if (seq_mode != SEQ_2)
1350                                 return -EINVAL;
1351                         if (get_user(pending_timer, p))
1352                                 return -EFAULT;
1353                         if (pending_timer < 0 || pending_timer >= num_sound_timers || sound_timer_devs[pending_timer] == NULL)
1354                         {
1355                                 pending_timer = -1;
1356                                 return -EINVAL;
1357                         }
1358                         val = pending_timer;
1359                         break;
1360
1361                 case SNDCTL_SEQ_PANIC:
1362                         seq_panic();
1363                         return -EINVAL;
1364
1365                 case SNDCTL_SEQ_SYNC:
1366                         if (mode == OPEN_READ)
1367                                 return 0;
1368                         while (qlen > 0 && !signal_pending(current))
1369                                 seq_sync();
1370                         return qlen ? -EINTR : 0;
1371
1372                 case SNDCTL_SEQ_RESET:
1373                         seq_reset();
1374                         return 0;
1375
1376                 case SNDCTL_SEQ_TESTMIDI:
1377                         if (__get_user(midi_dev, p))
1378                                 return -EFAULT;
1379                         if (midi_dev < 0 || midi_dev >= max_mididev || !midi_devs[midi_dev])
1380                                 return -ENXIO;
1381
1382                         if (!midi_opened[midi_dev] &&
1383                                 (err = midi_devs[midi_dev]->open(midi_dev, mode, sequencer_midi_input,
1384                                                      sequencer_midi_output)) < 0)
1385                                 return err;
1386                         midi_opened[midi_dev] = 1;
1387                         return 0;
1388
1389                 case SNDCTL_SEQ_GETINCOUNT:
1390                         if (mode == OPEN_WRITE)
1391                                 return 0;
1392                         val = iqlen;
1393                         break;
1394
1395                 case SNDCTL_SEQ_GETOUTCOUNT:
1396                         if (mode == OPEN_READ)
1397                                 return 0;
1398                         val = SEQ_MAX_QUEUE - qlen;
1399                         break;
1400
1401                 case SNDCTL_SEQ_GETTIME:
1402                         if (seq_mode == SEQ_2)
1403                                 return tmr->ioctl(tmr_no, cmd, arg);
1404                         val = jiffies - seq_time;
1405                         break;
1406
1407                 case SNDCTL_SEQ_CTRLRATE:
1408                         /*
1409                          * If *arg == 0, just return the current rate
1410                          */
1411                         if (seq_mode == SEQ_2)
1412                                 return tmr->ioctl(tmr_no, cmd, arg);
1413
1414                         if (get_user(val, p))
1415                                 return -EFAULT;
1416                         if (val != 0)
1417                                 return -EINVAL;
1418                         val = HZ;
1419                         break;
1420
1421                 case SNDCTL_SEQ_RESETSAMPLES:
1422                 case SNDCTL_SYNTH_REMOVESAMPLE:
1423                 case SNDCTL_SYNTH_CONTROL:
1424                         if (get_user(dev, p))
1425                                 return -EFAULT;
1426                         if (dev < 0 || dev >= num_synths || synth_devs[dev] == NULL)
1427                                 return -ENXIO;
1428                         if (!(synth_open_mask & (1 << dev)) && !orig_dev)
1429                                 return -EBUSY;
1430                         return synth_devs[dev]->ioctl(dev, cmd, arg);
1431
1432                 case SNDCTL_SEQ_NRSYNTHS:
1433                         val = max_synthdev;
1434                         break;
1435
1436                 case SNDCTL_SEQ_NRMIDIS:
1437                         val = max_mididev;
1438                         break;
1439
1440                 case SNDCTL_SYNTH_MEMAVL:
1441                         if (get_user(dev, p))
1442                                 return -EFAULT;
1443                         if (dev < 0 || dev >= num_synths || synth_devs[dev] == NULL)
1444                                 return -ENXIO;
1445                         if (!(synth_open_mask & (1 << dev)) && !orig_dev)
1446                                 return -EBUSY;
1447                         val = synth_devs[dev]->ioctl(dev, cmd, arg);
1448                         break;
1449
1450                 case SNDCTL_FM_4OP_ENABLE:
1451                         if (get_user(dev, p))
1452                                 return -EFAULT;
1453                         if (dev < 0 || dev >= num_synths || synth_devs[dev] == NULL)
1454                                 return -ENXIO;
1455                         if (!(synth_open_mask & (1 << dev)))
1456                                 return -ENXIO;
1457                         synth_devs[dev]->ioctl(dev, cmd, arg);
1458                         return 0;
1459
1460                 case SNDCTL_SYNTH_INFO:
1461                         if (get_user(dev, &((struct synth_info __user *)arg)->device))
1462                                 return -EFAULT;
1463                         if (dev < 0 || dev >= max_synthdev)
1464                                 return -ENXIO;
1465                         if (!(synth_open_mask & (1 << dev)) && !orig_dev)
1466                                 return -EBUSY;
1467                         return synth_devs[dev]->ioctl(dev, cmd, arg);
1468
1469                 /* Like SYNTH_INFO but returns ID in the name field */
1470                 case SNDCTL_SYNTH_ID:
1471                         if (get_user(dev, &((struct synth_info __user *)arg)->device))
1472                                 return -EFAULT;
1473                         if (dev < 0 || dev >= max_synthdev)
1474                                 return -ENXIO;
1475                         if (!(synth_open_mask & (1 << dev)) && !orig_dev)
1476                                 return -EBUSY;
1477                         memcpy(&inf, synth_devs[dev]->info, sizeof(inf));
1478                         strlcpy(inf.name, synth_devs[dev]->id, sizeof(inf.name));
1479                         inf.device = dev;
1480                         return copy_to_user(arg, &inf, sizeof(inf))?-EFAULT:0;
1481
1482                 case SNDCTL_SEQ_OUTOFBAND:
1483                         if (copy_from_user(&event_rec, arg, sizeof(event_rec)))
1484                                 return -EFAULT;
1485                         spin_lock_irqsave(&lock,flags);
1486                         play_event(event_rec.arr);
1487                         spin_unlock_irqrestore(&lock,flags);
1488                         return 0;
1489
1490                 case SNDCTL_MIDI_INFO:
1491                         if (get_user(dev, &((struct midi_info __user *)arg)->device))
1492                                 return -EFAULT;
1493                         if (dev < 0 || dev >= max_mididev || !midi_devs[dev])
1494                                 return -ENXIO;
1495                         midi_devs[dev]->info.device = dev;
1496                         return copy_to_user(arg, &midi_devs[dev]->info, sizeof(struct midi_info))?-EFAULT:0;
1497
1498                 case SNDCTL_SEQ_THRESHOLD:
1499                         if (get_user(val, p))
1500                                 return -EFAULT;
1501                         if (val < 1)
1502                                 val = 1;
1503                         if (val >= SEQ_MAX_QUEUE)
1504                                 val = SEQ_MAX_QUEUE - 1;
1505                         output_threshold = val;
1506                         return 0;
1507
1508                 case SNDCTL_MIDI_PRETIME:
1509                         if (get_user(val, p))
1510                                 return -EFAULT;
1511                         if (val < 0)
1512                                 val = 0;
1513                         val = (HZ * val) / 10;
1514                         pre_event_timeout = val;
1515                         break;
1516
1517                 default:
1518                         if (mode == OPEN_READ)
1519                                 return -EIO;
1520                         if (!synth_devs[0])
1521                                 return -ENXIO;
1522                         if (!(synth_open_mask & (1 << 0)))
1523                                 return -ENXIO;
1524                         if (!synth_devs[0]->ioctl)
1525                                 return -EINVAL;
1526                         return synth_devs[0]->ioctl(0, cmd, arg);
1527         }
1528         return put_user(val, p);
1529 }
1530
1531 /* No kernel lock - we're using the global irq lock here */
1532 unsigned int sequencer_poll(int dev, struct file *file, poll_table * wait)
1533 {
1534         unsigned long flags;
1535         unsigned int mask = 0;
1536
1537         dev = dev >> 4;
1538
1539         spin_lock_irqsave(&lock,flags);
1540         /* input */
1541         poll_wait(file, &midi_sleeper, wait);
1542         if (iqlen)
1543                 mask |= POLLIN | POLLRDNORM;
1544
1545         /* output */
1546         poll_wait(file, &seq_sleeper, wait);
1547         if ((SEQ_MAX_QUEUE - qlen) >= output_threshold)
1548                 mask |= POLLOUT | POLLWRNORM;
1549         spin_unlock_irqrestore(&lock,flags);
1550         return mask;
1551 }
1552
1553
1554 void sequencer_timer(unsigned long dummy)
1555 {
1556         seq_startplay();
1557 }
1558 EXPORT_SYMBOL(sequencer_timer);
1559
1560 int note_to_freq(int note_num)
1561 {
1562
1563         /*
1564          * This routine converts a midi note to a frequency (multiplied by 1000)
1565          */
1566
1567         int note, octave, note_freq;
1568         static int notes[] =
1569         {
1570                 261632, 277189, 293671, 311132, 329632, 349232,
1571                 369998, 391998, 415306, 440000, 466162, 493880
1572         };
1573
1574 #define BASE_OCTAVE     5
1575
1576         octave = note_num / 12;
1577         note = note_num % 12;
1578
1579         note_freq = notes[note];
1580
1581         if (octave < BASE_OCTAVE)
1582                 note_freq >>= (BASE_OCTAVE - octave);
1583         else if (octave > BASE_OCTAVE)
1584                 note_freq <<= (octave - BASE_OCTAVE);
1585
1586         /*
1587          * note_freq >>= 1;
1588          */
1589
1590         return note_freq;
1591 }
1592 EXPORT_SYMBOL(note_to_freq);
1593
1594 unsigned long compute_finetune(unsigned long base_freq, int bend, int range,
1595                  int vibrato_cents)
1596 {
1597         unsigned long amount;
1598         int negative, semitones, cents, multiplier = 1;
1599
1600         if (!bend)
1601                 return base_freq;
1602         if (!range)
1603                 return base_freq;
1604
1605         if (!base_freq)
1606                 return base_freq;
1607
1608         if (range >= 8192)
1609                 range = 8192;
1610
1611         bend = bend * range / 8192;     /* Convert to cents */
1612         bend += vibrato_cents;
1613
1614         if (!bend)
1615                 return base_freq;
1616
1617         negative = bend < 0 ? 1 : 0;
1618
1619         if (bend < 0)
1620                 bend *= -1;
1621         if (bend > range)
1622                 bend = range;
1623
1624         /*
1625            if (bend > 2399)
1626            bend = 2399;
1627          */
1628         while (bend > 2399)
1629         {
1630                 multiplier *= 4;
1631                 bend -= 2400;
1632         }
1633
1634         semitones = bend / 100;
1635         if (semitones > 99)
1636                 semitones = 99;
1637         cents = bend % 100;
1638
1639         amount = (int) (semitone_tuning[semitones] * multiplier * cent_tuning[cents]) / 10000;
1640
1641         if (negative)
1642                 return (base_freq * 10000) / amount;    /* Bend down */
1643         else
1644                 return (base_freq * amount) / 10000;    /* Bend up */
1645 }
1646 EXPORT_SYMBOL(compute_finetune);
1647
1648 void sequencer_init(void)
1649 {
1650         if (sequencer_ok)
1651                 return;
1652         queue = (unsigned char *)vmalloc(SEQ_MAX_QUEUE * EV_SZ);
1653         if (queue == NULL)
1654         {
1655                 printk(KERN_ERR "sequencer: Can't allocate memory for sequencer output queue\n");
1656                 return;
1657         }
1658         iqueue = (unsigned char *)vmalloc(SEQ_MAX_QUEUE * IEV_SZ);
1659         if (iqueue == NULL)
1660         {
1661                 printk(KERN_ERR "sequencer: Can't allocate memory for sequencer input queue\n");
1662                 vfree(queue);
1663                 return;
1664         }
1665         sequencer_ok = 1;
1666 }
1667 EXPORT_SYMBOL(sequencer_init);
1668
1669 void sequencer_unload(void)
1670 {
1671         vfree(queue);
1672         vfree(iqueue);
1673         queue = iqueue = NULL;
1674 }