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
 160 static void sequencer_midi_input(int dev, unsigned char data)
 161 {
 162         unsigned int tstamp;
 163         unsigned char event_rec[4];
 164
 165         if (data == 0xfe)       /* Ignore active sensing */
 166                 return;
 167
 168         tstamp = jiffies - seq_time;
 169
 170         if (tstamp != prev_input_time)
 171         {
 172                 tstamp = (tstamp << 8) | SEQ_WAIT;
 173                 seq_copy_to_input((unsigned char *) &tstamp, 4);
 174                 prev_input_time = tstamp;
 175         }
 176         event_rec[0] = SEQ_MIDIPUTC;
 177         event_rec[1] = data;
 178         event_rec[2] = dev;
 179         event_rec[3] = 0;
 180
 181         seq_copy_to_input(event_rec, 4);
 182 }
 183
 184 void seq_input_event(unsigned char *event_rec, int len)
 185 {
 186         unsigned long this_time;
 187
 188         if (seq_mode == SEQ_2)
 189                 this_time = tmr->get_time(tmr_no);
 190         else
 191                 this_time = jiffies - seq_time;
 192
 193         if (this_time != prev_input_time)
 194         {
 195                 unsigned char   tmp_event[8];
 196
 197                 tmp_event[0] = EV_TIMING;
 198                 tmp_event[1] = TMR_WAIT_ABS;
 199                 tmp_event[2] = 0;
 200                 tmp_event[3] = 0;
 201                 *(unsigned int *) &tmp_event[4] = this_time;
 202
 203                 seq_copy_to_input(tmp_event, 8);
 204                 prev_input_time = this_time;
 205         }
 206         seq_copy_to_input(event_rec, len);
 207 }
 208
 209 int sequencer_write(int dev, struct file *file, const char __user *buf, int count)
 210 {
 211         unsigned char event_rec[EV_SZ], ev_code;
 212         int p = 0, c, ev_size;
 213         int err;
 214         int mode = translate_mode(file);
 215
 216         dev = dev >> 4;
 217
 218         DEB(printk("sequencer_write(dev=%d, count=%d)\n", dev, count));
 219
 220         if (mode == OPEN_READ)
 221                 return -EIO;
 222
 223         c = count;
 224
 225         while (c >= 4)
 226         {
 227                 if (copy_from_user((char *) event_rec, &(buf)[p], 4))
 228                         goto out;
 229                 ev_code = event_rec[0];
 230
 231                 if (ev_code == SEQ_FULLSIZE)
 232                 {
 233                         int err, fmt;
 234
 235                         dev = *(unsigned short *) &event_rec[2];
 236                         if (dev < 0 || dev >= max_synthdev || synth_devs[dev] == NULL)
 237                                 return -ENXIO;
 238
 239                         if (!(synth_open_mask & (1 << dev)))
 240                                 return -ENXIO;
 241
 242                         fmt = (*(short *) &event_rec[0]) & 0xffff;
 243                         err = synth_devs[dev]->load_patch(dev, fmt, buf, p + 4, c, 0);
 244                         if (err < 0)
 245                                 return err;
 246
 247                         return err;
 248                 }
 249                 if (ev_code >= 128)
 250                 {
 251                         if (seq_mode == SEQ_2 && ev_code == SEQ_EXTENDED)
 252                         {
 253                                 printk(KERN_WARNING "Sequencer: Invalid level 2 event %x\n", ev_code);
 254                                 return -EINVAL;
 255                         }
 256                         ev_size = 8;
 257
 258                         if (c < ev_size)
 259                         {
 260                                 if (!seq_playing)
 261                                         seq_startplay();
 262                                 return count - c;
 263                         }
 264                         if (copy_from_user((char *)&event_rec[4],
 265                                            &(buf)[p + 4], 4))
 266                                 goto out;
 267
 268                 }
 269                 else
 270                 {
 271                         if (seq_mode == SEQ_2)
 272                         {
 273                                 printk(KERN_WARNING "Sequencer: 4 byte event in level 2 mode\n");
 274                                 return -EINVAL;
 275                         }
 276                         ev_size = 4;
 277
 278                         if (event_rec[0] != SEQ_MIDIPUTC)
 279                                 obsolete_api_used = 1;
 280                 }
 281
 282                 if (event_rec[0] == SEQ_MIDIPUTC)
 283                 {
 284                         if (!midi_opened[event_rec[2]])
 285                         {
 286                                 int mode;
 287                                 int dev = event_rec[2];
 288
 289                                 if (dev >= max_mididev || midi_devs[dev]==NULL)
 290                                 {
 291                                         /*printk("Sequencer Error: Nonexistent MIDI device %d\n", dev);*/
 292                                         return -ENXIO;
 293                                 }
 294                                 mode = translate_mode(file);
 295
 296                                 if ((err = midi_devs[dev]->open(dev, mode,
 297                                                                 sequencer_midi_input, sequencer_midi_output)) < 0)
 298                                 {
 299                                         seq_reset();
 300                                         printk(KERN_WARNING "Sequencer Error: Unable to open Midi #%d\n", dev);
 301                                         return err;
 302                                 }
 303                                 midi_opened[dev] = 1;
 304                         }
 305                 }
 306                 if (!seq_queue(event_rec, (file->f_flags & (O_NONBLOCK) ? 1 : 0)))
 307                 {
 308                         int processed = count - c;
 309
 310                         if (!seq_playing)
 311                                 seq_startplay();
 312
 313                         if (!processed && (file->f_flags & O_NONBLOCK))
 314                                 return -EAGAIN;
 315                         else
 316                                 return processed;
 317                 }
 318                 p += ev_size;
 319                 c -= ev_size;
 320         }
 321
 322         if (!seq_playing)
 323                 seq_startplay();
 324 out:
 325         return count;
 326 }
 327
 328 static int seq_queue(unsigned char *note, char nonblock)
 329 {
 330
 331         /*
 332          * Test if there is space in the queue
 333          */
 334
 335         if (qlen >= SEQ_MAX_QUEUE)
 336                 if (!seq_playing)
 337                         seq_startplay();        /*
 338                                                  * Give chance to drain the queue
 339                                                  */
 340
 341         if (!nonblock && qlen >= SEQ_MAX_QUEUE && !waitqueue_active(&seq_sleeper)) {
 342                 /*
 343                  * Sleep until there is enough space on the queue
 344                  */
 345                 interruptible_sleep_on(&seq_sleeper);
 346         }
 347         if (qlen >= SEQ_MAX_QUEUE)
 348         {
 349                 return 0;       /*
 350                                  * To be sure
 351                                  */
 352         }
 353         memcpy(&queue[qtail * EV_SZ], note, EV_SZ);
 354
 355         qtail = (qtail + 1) % SEQ_MAX_QUEUE;
 356         qlen++;
 357
 358         return 1;
 359 }
 360
 361 static int extended_event(unsigned char *q)
 362 {
 363         int dev = q[2];
 364
 365         if (dev < 0 || dev >= max_synthdev)
 366                 return -ENXIO;
 367
 368         if (!(synth_open_mask & (1 << dev)))
 369                 return -ENXIO;
 370
 371         switch (q[1])
 372         {
 373                 case SEQ_NOTEOFF:
 374                         synth_devs[dev]->kill_note(dev, q[3], q[4], q[5]);
 375                         break;
 376
 377                 case SEQ_NOTEON:
 378                         if (q[4] > 127 && q[4] != 255)
 379                                 return 0;
 380
 381                         if (q[5] == 0)
 382                         {
 383                                 synth_devs[dev]->kill_note(dev, q[3], q[4], q[5]);
 384                                 break;
 385                         }
 386                         synth_devs[dev]->start_note(dev, q[3], q[4], q[5]);
 387                         break;
 388
 389                 case SEQ_PGMCHANGE:
 390                         synth_devs[dev]->set_instr(dev, q[3], q[4]);
 391                         break;
 392
 393                 case SEQ_AFTERTOUCH:
 394                         synth_devs[dev]->aftertouch(dev, q[3], q[4]);
 395                         break;
 396
 397                 case SEQ_BALANCE:
 398                         synth_devs[dev]->panning(dev, q[3], (char) q[4]);
 399                         break;
 400
 401                 case SEQ_CONTROLLER:
 402                         synth_devs[dev]->controller(dev, q[3], q[4], (short) (q[5] | (q[6] << 8)));
 403                         break;
 404
 405                 case SEQ_VOLMODE:
 406                         if (synth_devs[dev]->volume_method != NULL)
 407                                 synth_devs[dev]->volume_method(dev, q[3]);
 408                         break;
 409
 410                 default:
 411                         return -EINVAL;
 412         }
 413         return 0;
 414 }
 415
 416 static int find_voice(int dev, int chn, int note)
 417 {
 418         unsigned short key;
 419         int i;
 420
 421         key = (chn << 8) | (note + 1);
 422         for (i = 0; i < synth_devs[dev]->alloc.max_voice; i++)
 423                 if (synth_devs[dev]->alloc.map[i] == key)
 424                         return i;
 425         return -1;
 426 }
 427
 428 static int alloc_voice(int dev, int chn, int note)
 429 {
 430         unsigned short  key;
 431         int voice;
 432
 433         key = (chn << 8) | (note + 1);
 434
 435         voice = synth_devs[dev]->alloc_voice(dev, chn, note,
 436                                              &synth_devs[dev]->alloc);
 437         synth_devs[dev]->alloc.map[voice] = key;
 438         synth_devs[dev]->alloc.alloc_times[voice] =
 439                         synth_devs[dev]->alloc.timestamp++;
 440         return voice;
 441 }
 442
 443 static void seq_chn_voice_event(unsigned char *event_rec)
 444 {
 445 #define dev event_rec[1]
 446 #define cmd event_rec[2]
 447 #define chn event_rec[3]
 448 #define note event_rec[4]
 449 #define parm event_rec[5]
 450
 451         int voice = -1;
 452
 453         if ((int) dev > max_synthdev || synth_devs[dev] == NULL)
 454                 return;
 455         if (!(synth_open_mask & (1 << dev)))
 456                 return;
 457         if (!synth_devs[dev])
 458                 return;
 459
 460         if (seq_mode == SEQ_2)
 461         {
 462                 if (synth_devs[dev]->alloc_voice)
 463                         voice = find_voice(dev, chn, note);
 464
 465                 if (cmd == MIDI_NOTEON && parm == 0)
 466                 {
 467                         cmd = MIDI_NOTEOFF;
 468                         parm = 64;
 469                 }
 470         }
 471
 472         switch (cmd)
 473         {
 474                 case MIDI_NOTEON:
 475                         if (note > 127 && note != 255)  /* Not a seq2 feature */
 476                                 return;
 477
 478                         if (voice == -1 && seq_mode == SEQ_2 && synth_devs[dev]->alloc_voice)
 479                         {
 480                                 /* Internal synthesizer (FM, GUS, etc) */
 481                                 voice = alloc_voice(dev, chn, note);
 482                         }
 483                         if (voice == -1)
 484                                 voice = chn;
 485
 486                         if (seq_mode == SEQ_2 && (int) dev < num_synths)
 487                         {
 488                                 /*
 489                                  * The MIDI channel 10 is a percussive channel. Use the note
 490                                  * number to select the proper patch (128 to 255) to play.
 491                                  */
 492
 493                                 if (chn == 9)
 494                                 {
 495                                         synth_devs[dev]->set_instr(dev, voice, 128 + note);
 496                                         synth_devs[dev]->chn_info[chn].pgm_num = 128 + note;
 497                                 }
 498                                 synth_devs[dev]->setup_voice(dev, voice, chn);
 499                         }
 500                         synth_devs[dev]->start_note(dev, voice, note, parm);
 501                         break;
 502
 503                 case MIDI_NOTEOFF:
 504                         if (voice == -1)
 505                                 voice = chn;
 506                         synth_devs[dev]->kill_note(dev, voice, note, parm);
 507                         break;
 508
 509                 case MIDI_KEY_PRESSURE:
 510                         if (voice == -1)
 511                                 voice = chn;
 512                         synth_devs[dev]->aftertouch(dev, voice, parm);
 513                         break;
 514
 515                 default:;
 516         }
 517 #undef dev
 518 #undef cmd
 519 #undef chn
 520 #undef note
 521 #undef parm
 522 }
 523
 524
 525 static void seq_chn_common_event(unsigned char *event_rec)
 526 {
 527         unsigned char dev = event_rec[1];
 528         unsigned char cmd = event_rec[2];
 529         unsigned char chn = event_rec[3];
 530         unsigned char p1 = event_rec[4];
 531
 532         /* unsigned char p2 = event_rec[5]; */
 533         unsigned short w14 = *(short *) &event_rec[6];
 534
 535         if ((int) dev > max_synthdev || synth_devs[dev] == NULL)
 536                 return;
 537         if (!(synth_open_mask & (1 << dev)))
 538                 return;
 539         if (!synth_devs[dev])
 540                 return;
 541
 542         switch (cmd)
 543         {
 544                 case MIDI_PGM_CHANGE:
 545                         if (seq_mode == SEQ_2)
 546                         {
 547                                 synth_devs[dev]->chn_info[chn].pgm_num = p1;
 548                                 if ((int) dev >= num_synths)
 549                                         synth_devs[dev]->set_instr(dev, chn, p1);
 550                         }
 551                         else
 552                                 synth_devs[dev]->set_instr(dev, chn, p1);
 553
 554                         break;
 555
 556                 case MIDI_CTL_CHANGE:
 557                         if (seq_mode == SEQ_2)
 558                         {
 559                                 if (chn > 15 || p1 > 127)
 560                                         break;
 561
 562                                 synth_devs[dev]->chn_info[chn].controllers[p1] = w14 & 0x7f;
 563
 564                                 if (p1 < 32)    /* Setting MSB should clear LSB to 0 */
 565                                         synth_devs[dev]->chn_info[chn].controllers[p1 + 32] = 0;
 566
 567                                 if ((int) dev < num_synths)
 568                                 {
 569                                         int val = w14 & 0x7f;
 570                                         int i, key;
 571
 572                                         if (p1 < 64)    /* Combine MSB and LSB */
 573                                         {
 574                                                 val = ((synth_devs[dev]->
 575                                                         chn_info[chn].controllers[p1 & ~32] & 0x7f) << 7)
 576                                                         | (synth_devs[dev]->
 577                                                         chn_info[chn].controllers[p1 | 32] & 0x7f);
 578                                                 p1 &= ~32;
 579                                         }
 580                                         /* Handle all playing notes on this channel */
 581
 582                                         key = ((int) chn << 8);
 583
 584                                         for (i = 0; i < synth_devs[dev]->alloc.max_voice; i++)
 585                                                 if ((synth_devs[dev]->alloc.map[i] & 0xff00) == key)
 586                                                         synth_devs[dev]->controller(dev, i, p1, val);
 587                                 }
 588                                 else
 589                                         synth_devs[dev]->controller(dev, chn, p1, w14);
 590                         }
 591                         else    /* Mode 1 */
 592                                 synth_devs[dev]->controller(dev, chn, p1, w14);
 593                         break;
 594
 595                 case MIDI_PITCH_BEND:
 596                         if (seq_mode == SEQ_2)
 597                         {
 598                                 synth_devs[dev]->chn_info[chn].bender_value = w14;
 599
 600                                 if ((int) dev < num_synths)
 601                                 {
 602                                         /* Handle all playing notes on this channel */
 603                                         int i, key;
 604
 605                                         key = (chn << 8);
 606
 607                                         for (i = 0; i < synth_devs[dev]->alloc.max_voice; i++)
 608                                                 if ((synth_devs[dev]->alloc.map[i] & 0xff00) == key)
 609                                                         synth_devs[dev]->bender(dev, i, w14);
 610                                 }
 611                                 else
 612                                         synth_devs[dev]->bender(dev, chn, w14);
 613                         }
 614                         else    /* MODE 1 */
 615                                 synth_devs[dev]->bender(dev, chn, w14);
 616                         break;
 617
 618                 default:;
 619         }
 620 }
 621
 622 static int seq_timing_event(unsigned char *event_rec)
 623 {
 624         unsigned char cmd = event_rec[1];
 625         unsigned int parm = *(int *) &event_rec[4];
 626
 627         if (seq_mode == SEQ_2)
 628         {
 629                 int ret;
 630
 631                 if ((ret = tmr->event(tmr_no, event_rec)) == TIMER_ARMED)
 632                         if ((SEQ_MAX_QUEUE - qlen) >= output_threshold)
 633                                 wake_up(&seq_sleeper);
 634                 return ret;
 635         }
 636         switch (cmd)
 637         {
 638                 case TMR_WAIT_REL:
 639                         parm += prev_event_time;
 640
 641                         /*
 642                          * NOTE!  No break here. Execution of TMR_WAIT_REL continues in the
 643                          * next case (TMR_WAIT_ABS)
 644                          */
 645
 646                 case TMR_WAIT_ABS:
 647                         if (parm > 0)
 648                         {
 649                                 long time;
 650
 651                                 time = parm;
 652                                 prev_event_time = time;
 653
 654                                 seq_playing = 1;
 655                                 request_sound_timer(time);
 656
 657                                 if ((SEQ_MAX_QUEUE - qlen) >= output_threshold)
 658                                         wake_up(&seq_sleeper);
 659                                 return TIMER_ARMED;
 660                         }
 661                         break;
 662
 663                 case TMR_START:
 664                         seq_time = jiffies;
 665                         prev_input_time = 0;
 666                         prev_event_time = 0;
 667                         break;
 668
 669                 case TMR_STOP:
 670                         break;
 671
 672                 case TMR_CONTINUE:
 673                         break;
 674
 675                 case TMR_TEMPO:
 676                         break;
 677
 678                 case TMR_ECHO:
 679                         if (seq_mode == SEQ_2)
 680                                 seq_copy_to_input(event_rec, 8);
 681                         else
 682                         {
 683                                 parm = (parm << 8 | SEQ_ECHO);
 684                                 seq_copy_to_input((unsigned char *) &parm, 4);
 685                         }
 686                         break;
 687
 688                 default:;
 689         }
 690
 691         return TIMER_NOT_ARMED;
 692 }
 693
 694 static void seq_local_event(unsigned char *event_rec)
 695 {
 696         unsigned char   cmd = event_rec[1];
 697         unsigned int    parm = *((unsigned int *) &event_rec[4]);
 698
 699         switch (cmd)
 700         {
 701                 case LOCL_STARTAUDIO:
 702                         DMAbuf_start_devices(parm);
 703                         break;
 704
 705                 default:;
 706         }
 707 }
 708
 709 static void seq_sysex_message(unsigned char *event_rec)
 710 {
 711         unsigned int dev = event_rec[1];
 712         int i, l = 0;
 713         unsigned char  *buf = &event_rec[2];
 714
 715         if (dev > max_synthdev)
 716                 return;
 717         if (!(synth_open_mask & (1 << dev)))
 718                 return;
 719         if (!synth_devs[dev])
 720                 return;
 721
 722         l = 0;
 723         for (i = 0; i < 6 && buf[i] != 0xff; i++)
 724                 l = i + 1;
 725
 726         if (!synth_devs[dev]->send_sysex)
 727                 return;
 728         if (l > 0)
 729                 synth_devs[dev]->send_sysex(dev, buf, l);
 730 }
 731
 732 static int play_event(unsigned char *q)
 733 {
 734         /*
 735          * NOTE! This routine returns
 736          *   0 = normal event played.
 737          *   1 = Timer armed. Suspend playback until timer callback.
 738          *   2 = MIDI output buffer full. Restore queue and suspend until timer
 739          */
 740         unsigned int *delay;
 741
 742         switch (q[0])
 743         {
 744                 case SEQ_NOTEOFF:
 745                         if (synth_open_mask & (1 << 0))
 746                                 if (synth_devs[0])
 747                                         synth_devs[0]->kill_note(0, q[1], 255, q[3]);
 748                         break;
 749
 750                 case SEQ_NOTEON:
 751                         if (q[4] < 128 || q[4] == 255)
 752                                 if (synth_open_mask & (1 << 0))
 753                                         if (synth_devs[0])
 754                                                 synth_devs[0]->start_note(0, q[1], q[2], q[3]);
 755                         break;
 756
 757                 case SEQ_WAIT:
 758                         delay = (unsigned int *) q;     /*
 759                                                          * Bytes 1 to 3 are containing the *
 760                                                          * delay in 'ticks'
 761                                                          */
 762                         *delay = (*delay >> 8) & 0xffffff;
 763
 764                         if (*delay > 0)
 765                         {
 766                                 long time;
 767
 768                                 seq_playing = 1;
 769                                 time = *delay;
 770                                 prev_event_time = time;
 771
 772                                 request_sound_timer(time);
 773
 774                                 if ((SEQ_MAX_QUEUE - qlen) >= output_threshold)
 775                                         wake_up(&seq_sleeper);
 776                                 /*
 777                                  * The timer is now active and will reinvoke this function
 778                                  * after the timer expires. Return to the caller now.
 779                                  */
 780                                 return 1;
 781                         }
 782                         break;
 783
 784                 case SEQ_PGMCHANGE:
 785                         if (synth_open_mask & (1 << 0))
 786                                 if (synth_devs[0])
 787                                         synth_devs[0]->set_instr(0, q[1], q[2]);
 788                         break;
 789
 790                 case SEQ_SYNCTIMER:     /*
 791                                          * Reset timer
 792                                          */
 793                         seq_time = jiffies;
 794                         prev_input_time = 0;
 795                         prev_event_time = 0;
 796                         break;
 797
 798                 case SEQ_MIDIPUTC:      /*
 799                                          * Put a midi character
 800                                          */
 801                         if (midi_opened[q[2]])
 802                         {
 803                                 int dev;
 804
 805                                 dev = q[2];
 806
 807                                 if (dev < 0 || dev >= num_midis || midi_devs[dev] == NULL)
 808                                         break;
 809
 810                                 if (!midi_devs[dev]->outputc(dev, q[1]))
 811                                 {
 812                                         /*
 813                                          * Output FIFO is full. Wait one timer cycle and try again.
 814                                          */
 815
 816                                         seq_playing = 1;
 817                                         request_sound_timer(-1);
 818                                         return 2;
 819                                 }
 820                                 else
 821                                         midi_written[dev] = 1;
 822                         }
 823                         break;
 824
 825                 case SEQ_ECHO:
 826                         seq_copy_to_input(q, 4);        /*
 827                                                          * Echo back to the process
 828                                                          */
 829                         break;
 830
 831                 case SEQ_PRIVATE:
 832                         if ((int) q[1] < max_synthdev)
 833                                 synth_devs[q[1]]->hw_control(q[1], q);
 834                         break;
 835
 836                 case SEQ_EXTENDED:
 837                         extended_event(q);
 838                         break;
 839
 840                 case EV_CHN_VOICE:
 841                         seq_chn_voice_event(q);
 842                         break;
 843
 844                 case EV_CHN_COMMON:
 845                         seq_chn_common_event(q);
 846                         break;
 847
 848                 case EV_TIMING:
 849                         if (seq_timing_event(q) == TIMER_ARMED)
 850                         {
 851                                 return 1;
 852                         }
 853                         break;
 854
 855                 case EV_SEQ_LOCAL:
 856                         seq_local_event(q);
 857                         break;
 858
 859                 case EV_SYSEX:
 860                         seq_sysex_message(q);
 861                         break;
 862
 863                 default:;
 864         }
 865         return 0;
 866 }
 867
 868 /* called also as timer in irq context */
 869 static void seq_startplay(void)
 870 {
 871         int this_one, action;
 872         unsigned long flags;
 873
 874         while (qlen > 0)
 875         {
 876
 877                 spin_lock_irqsave(&lock,flags);
 878                 qhead = ((this_one = qhead) + 1) % SEQ_MAX_QUEUE;
 879                 qlen--;
 880                 spin_unlock_irqrestore(&lock,flags);
 881
 882                 seq_playing = 1;
 883
 884                 if ((action = play_event(&queue[this_one * EV_SZ])))
 885                 {               /* Suspend playback. Next timer routine invokes this routine again */
 886                         if (action == 2)
 887                         {
 888                                 qlen++;
 889                                 qhead = this_one;
 890                         }
 891                         return;
 892                 }
 893         }
 894
 895         seq_playing = 0;
 896
 897         if ((SEQ_MAX_QUEUE - qlen) >= output_threshold)
 898                 wake_up(&seq_sleeper);
 899 }
 900
 901 static void reset_controllers(int dev, unsigned char *controller, int update_dev)
 902 {
 903         int i;
 904         for (i = 0; i < 128; i++)
 905                 controller[i] = ctrl_def_values[i];
 906 }
 907
 908 static void setup_mode2(void)
 909 {
 910         int dev;
 911
 912         max_synthdev = num_synths;
 913
 914         for (dev = 0; dev < num_midis; dev++)
 915         {
 916                 if (midi_devs[dev] && midi_devs[dev]->converter != NULL)
 917                 {
 918                         synth_devs[max_synthdev++] = midi_devs[dev]->converter;
 919                 }
 920         }
 921
 922         for (dev = 0; dev < max_synthdev; dev++)
 923         {
 924                 int chn;
 925
 926                 synth_devs[dev]->sysex_ptr = 0;
 927                 synth_devs[dev]->emulation = 0;
 928
 929                 for (chn = 0; chn < 16; chn++)
 930                 {
 931                         synth_devs[dev]->chn_info[chn].pgm_num = 0;
 932                         reset_controllers(dev,
 933                                 synth_devs[dev]->chn_info[chn].controllers,0);
 934                         synth_devs[dev]->chn_info[chn].bender_value = (1 << 7); /* Neutral */
 935                         synth_devs[dev]->chn_info[chn].bender_range = 200;
 936                 }
 937         }
 938         max_mididev = 0;
 939         seq_mode = SEQ_2;
 940 }
 941
 942 int sequencer_open(int dev, struct file *file)
 943 {
 944         int retval, mode, i;
 945         int level, tmp;
 946
 947         if (!sequencer_ok)
 948                 sequencer_init();
 949
 950         level = ((dev & 0x0f) == SND_DEV_SEQ2) ? 2 : 1;
 951
 952         dev = dev >> 4;
 953         mode = translate_mode(file);
 954
 955         DEB(printk("sequencer_open(dev=%d)\n", dev));
 956
 957         if (!sequencer_ok)
 958         {
 959 /*              printk("Sound card: sequencer not initialized\n");*/
 960                 return -ENXIO;
 961         }
 962         if (dev)                /* Patch manager device (obsolete) */
 963                 return -ENXIO;
 964
 965         if(synth_devs[dev] == NULL)
 966                 request_module("synth0");
 967
 968         if (mode == OPEN_READ)
 969         {
 970                 if (!num_midis)
 971                 {
 972                         /*printk("Sequencer: No MIDI devices. Input not possible\n");*/
 973                         sequencer_busy = 0;
 974                         return -ENXIO;
 975                 }
 976         }
 977         if (sequencer_busy)
 978         {
 979                 return -EBUSY;
 980         }
 981         sequencer_busy = 1;
 982         obsolete_api_used = 0;
 983
 984         max_mididev = num_midis;
 985         max_synthdev = num_synths;
 986         pre_event_timeout = MAX_SCHEDULE_TIMEOUT;
 987         seq_mode = SEQ_1;
 988
 989         if (pending_timer != -1)
 990         {
 991                 tmr_no = pending_timer;
 992                 pending_timer = -1;
 993         }
 994         if (tmr_no == -1)       /* Not selected yet */
 995         {
 996                 int i, best;
 997
 998                 best = -1;
 999                 for (i = 0; i < num_sound_timers; i++)
1000                         if (sound_timer_devs[i] && sound_timer_devs[i]->priority > best)
1001                         {
1002                                 tmr_no = i;
1003                                 best = sound_timer_devs[i]->priority;
1004                         }
1005                 if (tmr_no == -1)       /* Should not be */
1006                         tmr_no = 0;
1007         }
1008         tmr = sound_timer_devs[tmr_no];
1009
1010         if (level == 2)
1011         {
1012                 if (tmr == NULL)
1013                 {
1014                         /*printk("sequencer: No timer for level 2\n");*/
1015                         sequencer_busy = 0;
1016                         return -ENXIO;
1017                 }
1018                 setup_mode2();
1019         }
1020         if (!max_synthdev && !max_mididev)
1021         {
1022                 sequencer_busy=0;
1023                 return -ENXIO;
1024         }
1025
1026         synth_open_mask = 0;
1027
1028         for (i = 0; i < max_mididev; i++)
1029         {
1030                 midi_opened[i] = 0;
1031                 midi_written[i] = 0;
1032         }
1033
1034         for (i = 0; i < max_synthdev; i++)
1035         {
1036                 if (synth_devs[i]==NULL)
1037                         continue;
1038
1039                 if (!try_module_get(synth_devs[i]->owner))
1040                         continue;
1041
1042                 if ((tmp = synth_devs[i]->open(i, mode)) < 0)
1043                 {
1044                         printk(KERN_WARNING "Sequencer: Warning! Cannot open synth device #%d (%d)\n", i, tmp);
1045                         if (synth_devs[i]->midi_dev)
1046                                 printk(KERN_WARNING "(Maps to MIDI dev #%d)\n", synth_devs[i]->midi_dev);
1047                 }
1048                 else
1049                 {
1050                         synth_open_mask |= (1 << i);
1051                         if (synth_devs[i]->midi_dev)
1052                                 midi_opened[synth_devs[i]->midi_dev] = 1;
1053                 }
1054         }
1055
1056         seq_time = jiffies;
1057
1058         prev_input_time = 0;
1059         prev_event_time = 0;
1060
1061         if (seq_mode == SEQ_1 && (mode == OPEN_READ || mode == OPEN_READWRITE))
1062         {
1063                 /*
1064                  * Initialize midi input devices
1065                  */
1066
1067                 for (i = 0; i < max_mididev; i++)
1068                         if (!midi_opened[i] && midi_devs[i])
1069                         {
1070                                 if (!try_module_get(midi_devs[i]->owner))
1071                                         continue;
1072
1073                                 if ((retval = midi_devs[i]->open(i, mode,
1074                                         sequencer_midi_input, sequencer_midi_output)) >= 0)
1075                                 {
1076                                         midi_opened[i] = 1;
1077                                 }
1078                         }
1079         }
1080
1081         if (seq_mode == SEQ_2) {
1082                 if (try_module_get(tmr->owner))
1083                         tmr->open(tmr_no, seq_mode);
1084         }
1085
1086         init_waitqueue_head(&seq_sleeper);
1087         init_waitqueue_head(&midi_sleeper);
1088         output_threshold = SEQ_MAX_QUEUE / 2;
1089
1090         return 0;
1091 }
1092
1093 static void seq_drain_midi_queues(void)
1094 {
1095         int i, n;
1096
1097         /*
1098          * Give the Midi drivers time to drain their output queues
1099          */
1100
1101         n = 1;
1102
1103         while (!signal_pending(current) && n)
1104         {
1105                 n = 0;
1106
1107                 for (i = 0; i < max_mididev; i++)
1108                         if (midi_opened[i] && midi_written[i])
1109                                 if (midi_devs[i]->buffer_status != NULL)
1110                                         if (midi_devs[i]->buffer_status(i))
1111                                                 n++;
1112
1113                 /*
1114                  * Let's have a delay
1115                  */
1116
1117                 if (n)
1118                         interruptible_sleep_on_timeout(&seq_sleeper,
1119                                                        HZ/10);
1120         }
1121 }
1122
1123 void sequencer_release(int dev, struct file *file)
1124 {
1125         int i;
1126         int mode = translate_mode(file);
1127
1128         dev = dev >> 4;
1129
1130         DEB(printk("sequencer_release(dev=%d)\n", dev));
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                         interruptible_sleep_on_timeout(&seq_sleeper,
1142                                                        3*HZ);
1143                         /* Extra delay */
1144                 }
1145         }
1146
1147         if (mode != OPEN_READ)
1148                 seq_drain_midi_queues();        /*
1149                                                  * Ensure the output queues are empty
1150                                                  */
1151         seq_reset();
1152         if (mode != OPEN_READ)
1153                 seq_drain_midi_queues();        /*
1154                                                  * Flush the all notes off messages
1155                                                  */
1156
1157         for (i = 0; i < max_synthdev; i++)
1158         {
1159                 if (synth_open_mask & (1 << i)) /*
1160                                                  * Actually opened
1161                                                  */
1162                         if (synth_devs[i])
1163                         {
1164                                 synth_devs[i]->close(i);
1165
1166                                 module_put(synth_devs[i]->owner);
1167
1168                                 if (synth_devs[i]->midi_dev)
1169                                         midi_opened[synth_devs[i]->midi_dev] = 0;
1170                         }
1171         }
1172
1173         for (i = 0; i < max_mididev; i++)
1174         {
1175                 if (midi_opened[i]) {
1176                         midi_devs[i]->close(i);
1177                         module_put(midi_devs[i]->owner);
1178                 }
1179         }
1180
1181         if (seq_mode == SEQ_2) {
1182                 tmr->close(tmr_no);
1183                 module_put(tmr->owner);
1184         }
1185
1186         if (obsolete_api_used)
1187                 printk(KERN_WARNING "/dev/music: Obsolete (4 byte) API was used by %s\n", current->comm);
1188         sequencer_busy = 0;
1189 }
1190
1191 static int seq_sync(void)
1192 {
1193         if (qlen && !seq_playing && !signal_pending(current))
1194                 seq_startplay();
1195
1196         if (qlen > 0)
1197                 interruptible_sleep_on_timeout(&seq_sleeper, HZ);
1198         return qlen;
1199 }
1200
1201 static void midi_outc(int dev, unsigned char data)
1202 {
1203         /*
1204          * NOTE! Calls sleep(). Don't call this from interrupt.
1205          */
1206
1207         int n;
1208         unsigned long flags;
1209
1210         /*
1211          * This routine sends one byte to the Midi channel.
1212          * If the output FIFO is full, it waits until there
1213          * is space in the queue
1214          */
1215
1216         n = 3 * HZ;             /* Timeout */
1217
1218         spin_lock_irqsave(&lock,flags);
1219         while (n && !midi_devs[dev]->outputc(dev, data)) {
1220                 interruptible_sleep_on_timeout(&seq_sleeper, HZ/25);
1221                 n--;
1222         }
1223         spin_unlock_irqrestore(&lock,flags);
1224 }
1225
1226 static void seq_reset(void)
1227 {
1228         /*
1229          * NOTE! Calls sleep(). Don't call this from interrupt.
1230          */
1231
1232         int i;
1233         int chn;
1234         unsigned long flags;
1235
1236         sound_stop_timer();
1237
1238         seq_time = jiffies;
1239         prev_input_time = 0;
1240         prev_event_time = 0;
1241
1242         qlen = qhead = qtail = 0;
1243         iqlen = iqhead = iqtail = 0;
1244
1245         for (i = 0; i < max_synthdev; i++)
1246                 if (synth_open_mask & (1 << i))
1247                         if (synth_devs[i])
1248                                 synth_devs[i]->reset(i);
1249
1250         if (seq_mode == SEQ_2)
1251         {
1252                 for (chn = 0; chn < 16; chn++)
1253                         for (i = 0; i < max_synthdev; i++)
1254                                 if (synth_open_mask & (1 << i))
1255                                         if (synth_devs[i])
1256                                         {
1257                                                 synth_devs[i]->controller(i, chn, 123, 0);      /* All notes off */
1258                                                 synth_devs[i]->controller(i, chn, 121, 0);      /* Reset all ctl */
1259                                                 synth_devs[i]->bender(i, chn, 1 << 13); /* Bender off */
1260                                         }
1261         }
1262         else    /* seq_mode == SEQ_1 */
1263         {
1264                 for (i = 0; i < max_mididev; i++)
1265                         if (midi_written[i])    /*
1266                                                  * Midi used. Some notes may still be playing
1267                                                  */
1268                         {
1269                                 /*
1270                                  *      Sending just a ACTIVE SENSING message should be enough to stop all
1271                                  *      playing notes. Since there are devices not recognizing the
1272                                  *      active sensing, we have to send some all notes off messages also.
1273                                  */
1274                                 midi_outc(i, 0xfe);
1275
1276                                 for (chn = 0; chn < 16; chn++)
1277                                 {
1278                                         midi_outc(i, (unsigned char) (0xb0 + (chn & 0x0f)));            /* control change */
1279                                         midi_outc(i, 0x7b);     /* All notes off */
1280                                         midi_outc(i, 0);        /* Dummy parameter */
1281                                 }
1282
1283                                 midi_devs[i]->close(i);
1284
1285                                 midi_written[i] = 0;
1286                                 midi_opened[i] = 0;
1287                         }
1288         }
1289
1290         seq_playing = 0;
1291
1292         spin_lock_irqsave(&lock,flags);
1293
1294         if (waitqueue_active(&seq_sleeper)) {
1295                 /*      printk( "Sequencer Warning: Unexpected sleeping process - Waking up\n"); */
1296                 wake_up(&seq_sleeper);
1297         }
1298         spin_unlock_irqrestore(&lock,flags);
1299 }
1300
1301 static void seq_panic(void)
1302 {
1303         /*
1304          * This routine is called by the application in case the user
1305          * wants to reset the system to the default state.
1306          */
1307
1308         seq_reset();
1309
1310         /*
1311          * Since some of the devices don't recognize the active sensing and
1312          * all notes off messages, we have to shut all notes manually.
1313          *
1314          *      TO BE IMPLEMENTED LATER
1315          */
1316
1317         /*
1318          * Also return the controllers to their default states
1319          */
1320 }
1321
1322 int sequencer_ioctl(int dev, struct file *file, unsigned int cmd, void __user *arg)
1323 {
1324         int midi_dev, orig_dev, val, err;
1325         int mode = translate_mode(file);
1326         struct synth_info inf;
1327         struct seq_event_rec event_rec;
1328         unsigned long flags;
1329         int __user *p = arg;
1330
1331         orig_dev = dev = dev >> 4;
1332
1333         switch (cmd)
1334         {
1335                 case SNDCTL_TMR_TIMEBASE:
1336                 case SNDCTL_TMR_TEMPO:
1337                 case SNDCTL_TMR_START:
1338                 case SNDCTL_TMR_STOP:
1339                 case SNDCTL_TMR_CONTINUE:
1340                 case SNDCTL_TMR_METRONOME:
1341                 case SNDCTL_TMR_SOURCE:
1342                         if (seq_mode != SEQ_2)
1343                                 return -EINVAL;
1344                         return tmr->ioctl(tmr_no, cmd, arg);
1345
1346                 case SNDCTL_TMR_SELECT:
1347                         if (seq_mode != SEQ_2)
1348                                 return -EINVAL;
1349                         if (get_user(pending_timer, p))
1350                                 return -EFAULT;
1351                         if (pending_timer < 0 || pending_timer >= num_sound_timers || sound_timer_devs[pending_timer] == NULL)
1352                         {
1353                                 pending_timer = -1;
1354                                 return -EINVAL;
1355                         }
1356                         val = pending_timer;
1357                         break;
1358
1359                 case SNDCTL_SEQ_PANIC:
1360                         seq_panic();
1361                         return -EINVAL;
1362
1363                 case SNDCTL_SEQ_SYNC:
1364                         if (mode == OPEN_READ)
1365                                 return 0;
1366                         while (qlen > 0 && !signal_pending(current))
1367                                 seq_sync();
1368                         return qlen ? -EINTR : 0;
1369
1370                 case SNDCTL_SEQ_RESET:
1371                         seq_reset();
1372                         return 0;
1373
1374                 case SNDCTL_SEQ_TESTMIDI:
1375                         if (__get_user(midi_dev, p))
1376                                 return -EFAULT;
1377                         if (midi_dev < 0 || midi_dev >= max_mididev || !midi_devs[midi_dev])
1378                                 return -ENXIO;
1379
1380                         if (!midi_opened[midi_dev] &&
1381                                 (err = midi_devs[midi_dev]->open(midi_dev, mode, sequencer_midi_input,
1382                                                      sequencer_midi_output)) < 0)
1383                                 return err;
1384                         midi_opened[midi_dev] = 1;
1385                         return 0;
1386
1387                 case SNDCTL_SEQ_GETINCOUNT:
1388                         if (mode == OPEN_WRITE)
1389                                 return 0;
1390                         val = iqlen;
1391                         break;
1392
1393                 case SNDCTL_SEQ_GETOUTCOUNT:
1394                         if (mode == OPEN_READ)
1395                                 return 0;
1396                         val = SEQ_MAX_QUEUE - qlen;
1397                         break;
1398
1399                 case SNDCTL_SEQ_GETTIME:
1400                         if (seq_mode == SEQ_2)
1401                                 return tmr->ioctl(tmr_no, cmd, arg);
1402                         val = jiffies - seq_time;
1403                         break;
1404
1405                 case SNDCTL_SEQ_CTRLRATE:
1406                         /*
1407                          * If *arg == 0, just return the current rate
1408                          */
1409                         if (seq_mode == SEQ_2)
1410                                 return tmr->ioctl(tmr_no, cmd, arg);
1411
1412                         if (get_user(val, p))
1413                                 return -EFAULT;
1414                         if (val != 0)
1415                                 return -EINVAL;
1416                         val = HZ;
1417                         break;
1418
1419                 case SNDCTL_SEQ_RESETSAMPLES:
1420                 case SNDCTL_SYNTH_REMOVESAMPLE:
1421                 case SNDCTL_SYNTH_CONTROL:
1422                         if (get_user(dev, p))
1423                                 return -EFAULT;
1424                         if (dev < 0 || dev >= num_synths || synth_devs[dev] == NULL)
1425                                 return -ENXIO;
1426                         if (!(synth_open_mask & (1 << dev)) && !orig_dev)
1427                                 return -EBUSY;
1428                         return synth_devs[dev]->ioctl(dev, cmd, arg);
1429
1430                 case SNDCTL_SEQ_NRSYNTHS:
1431                         val = max_synthdev;
1432                         break;
1433
1434                 case SNDCTL_SEQ_NRMIDIS:
1435                         val = max_mididev;
1436                         break;
1437
1438                 case SNDCTL_SYNTH_MEMAVL:
1439                         if (get_user(dev, p))
1440                                 return -EFAULT;
1441                         if (dev < 0 || dev >= num_synths || synth_devs[dev] == NULL)
1442                                 return -ENXIO;
1443                         if (!(synth_open_mask & (1 << dev)) && !orig_dev)
1444                                 return -EBUSY;
1445                         val = synth_devs[dev]->ioctl(dev, cmd, arg);
1446                         break;
1447
1448                 case SNDCTL_FM_4OP_ENABLE:
1449                         if (get_user(dev, p))
1450                                 return -EFAULT;
1451                         if (dev < 0 || dev >= num_synths || synth_devs[dev] == NULL)
1452                                 return -ENXIO;
1453                         if (!(synth_open_mask & (1 << dev)))
1454                                 return -ENXIO;
1455                         synth_devs[dev]->ioctl(dev, cmd, arg);
1456                         return 0;
1457
1458                 case SNDCTL_SYNTH_INFO:
1459                         if (get_user(dev, &((struct synth_info __user *)arg)->device))
1460                                 return -EFAULT;
1461                         if (dev < 0 || dev >= max_synthdev)
1462                                 return -ENXIO;
1463                         if (!(synth_open_mask & (1 << dev)) && !orig_dev)
1464                                 return -EBUSY;
1465                         return synth_devs[dev]->ioctl(dev, cmd, arg);
1466
1467                 /* Like SYNTH_INFO but returns ID in the name field */
1468                 case SNDCTL_SYNTH_ID:
1469                         if (get_user(dev, &((struct synth_info __user *)arg)->device))
1470                                 return -EFAULT;
1471                         if (dev < 0 || dev >= max_synthdev)
1472                                 return -ENXIO;
1473                         if (!(synth_open_mask & (1 << dev)) && !orig_dev)
1474                                 return -EBUSY;
1475                         memcpy(&inf, synth_devs[dev]->info, sizeof(inf));
1476                         strlcpy(inf.name, synth_devs[dev]->id, sizeof(inf.name));
1477                         inf.device = dev;
1478                         return copy_to_user(arg, &inf, sizeof(inf))?-EFAULT:0;
1479
1480                 case SNDCTL_SEQ_OUTOFBAND:
1481                         if (copy_from_user(&event_rec, arg, sizeof(event_rec)))
1482                                 return -EFAULT;
1483                         spin_lock_irqsave(&lock,flags);
1484                         play_event(event_rec.arr);
1485                         spin_unlock_irqrestore(&lock,flags);
1486                         return 0;
1487
1488                 case SNDCTL_MIDI_INFO:
1489                         if (get_user(dev, &((struct midi_info __user *)arg)->device))
1490                                 return -EFAULT;
1491                         if (dev < 0 || dev >= max_mididev || !midi_devs[dev])
1492                                 return -ENXIO;
1493                         midi_devs[dev]->info.device = dev;
1494                         return copy_to_user(arg, &midi_devs[dev]->info, sizeof(struct midi_info))?-EFAULT:0;
1495
1496                 case SNDCTL_SEQ_THRESHOLD:
1497                         if (get_user(val, p))
1498                                 return -EFAULT;
1499                         if (val < 1)
1500                                 val = 1;
1501                         if (val >= SEQ_MAX_QUEUE)
1502                                 val = SEQ_MAX_QUEUE - 1;
1503                         output_threshold = val;
1504                         return 0;
1505
1506                 case SNDCTL_MIDI_PRETIME:
1507                         if (get_user(val, p))
1508                                 return -EFAULT;
1509                         if (val < 0)
1510                                 val = 0;
1511                         val = (HZ * val) / 10;
1512                         pre_event_timeout = val;
1513                         break;
1514
1515                 default:
1516                         if (mode == OPEN_READ)
1517                                 return -EIO;
1518                         if (!synth_devs[0])
1519                                 return -ENXIO;
1520                         if (!(synth_open_mask & (1 << 0)))
1521                                 return -ENXIO;
1522                         if (!synth_devs[0]->ioctl)
1523                                 return -EINVAL;
1524                         return synth_devs[0]->ioctl(0, cmd, arg);
1525         }
1526         return put_user(val, p);
1527 }
1528
1529 /* No kernel lock - we're using the global irq lock here */
1530 unsigned int sequencer_poll(int dev, struct file *file, poll_table * wait)
1531 {
1532         unsigned long flags;
1533         unsigned int mask = 0;
1534
1535         dev = dev >> 4;
1536
1537         spin_lock_irqsave(&lock,flags);
1538         /* input */
1539         poll_wait(file, &midi_sleeper, wait);
1540         if (iqlen)
1541                 mask |= POLLIN | POLLRDNORM;
1542
1543         /* output */
1544         poll_wait(file, &seq_sleeper, wait);
1545         if ((SEQ_MAX_QUEUE - qlen) >= output_threshold)
1546                 mask |= POLLOUT | POLLWRNORM;
1547         spin_unlock_irqrestore(&lock,flags);
1548         return mask;
1549 }
1550
1551
1552 void sequencer_timer(unsigned long dummy)
1553 {
1554         seq_startplay();
1555 }
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
1590 unsigned long compute_finetune(unsigned long base_freq, int bend, int range,
1591                  int vibrato_cents)
1592 {
1593         unsigned long amount;
1594         int negative, semitones, cents, multiplier = 1;
1595
1596         if (!bend)
1597                 return base_freq;
1598         if (!range)
1599                 return base_freq;
1600
1601         if (!base_freq)
1602                 return base_freq;
1603
1604         if (range >= 8192)
1605                 range = 8192;
1606
1607         bend = bend * range / 8192;     /* Convert to cents */
1608         bend += vibrato_cents;
1609
1610         if (!bend)
1611                 return base_freq;
1612
1613         negative = bend < 0 ? 1 : 0;
1614
1615         if (bend < 0)
1616                 bend *= -1;
1617         if (bend > range)
1618                 bend = range;
1619
1620         /*
1621            if (bend > 2399)
1622            bend = 2399;
1623          */
1624         while (bend > 2399)
1625         {
1626                 multiplier *= 4;
1627                 bend -= 2400;
1628         }
1629
1630         semitones = bend / 100;
1631         if (semitones > 99)
1632                 semitones = 99;
1633         cents = bend % 100;
1634
1635         amount = (int) (semitone_tuning[semitones] * multiplier * cent_tuning[cents]) / 10000;
1636
1637         if (negative)
1638                 return (base_freq * 10000) / amount;    /* Bend down */
1639         else
1640                 return (base_freq * amount) / 10000;    /* Bend up */
1641 }
1642
1643
1644 void sequencer_init(void)
1645 {
1646         /* drag in sequencer_syms.o */
1647         {
1648                 extern char sequencer_syms_symbol;
1649                 sequencer_syms_symbol = 0;
1650         }
1651
1652         if (sequencer_ok)
1653                 return;
1654         MIDIbuf_init();
1655         queue = (unsigned char *)vmalloc(SEQ_MAX_QUEUE * EV_SZ);
1656         if (queue == NULL)
1657         {
1658                 printk(KERN_ERR "sequencer: Can't allocate memory for sequencer output queue\n");
1659                 return;
1660         }
1661         iqueue = (unsigned char *)vmalloc(SEQ_MAX_QUEUE * IEV_SZ);
1662         if (iqueue == NULL)
1663         {
1664                 printk(KERN_ERR "sequencer: Can't allocate memory for sequencer input queue\n");
1665                 vfree(queue);
1666                 return;
1667         }
1668         sequencer_ok = 1;
1669 }
1670
1671 void sequencer_unload(void)
1672 {
1673         vfree(queue);
1674         vfree(iqueue);
1675         queue = iqueue = NULL;
1676 }