sound/oss/sequencer.c

   1 /*
   2  * sound/oss/sequencer.c
   3  *
   4  * The sequencer personality manager.
   5  */
   6 /*
   7  * Copyright (C) by Hannu Savolainen 1993-1997
   8  *
   9  * OSS/Free for Linux is distributed under the GNU GENERAL PUBLIC LICENSE (GPL)
  10  * Version 2 (June 1991). See the "COPYING" file distributed with this software
  11  * for more info.
  12  */
  13 /*
  14  * Thomas Sailer   : ioctl code reworked (vmalloc/vfree removed)
  15  * Alan Cox        : reformatted and fixed a pair of null pointer bugs
  16  */
  17 #include <linux/kmod.h>
  18 #include <linux/spinlock.h>
  19 #include "sound_config.h"
  20
  21 #include "midi_ctrl.h"
  22 #include "sleep.h"
  23
  24 static int      sequencer_ok;
  25 static struct sound_timer_operations *tmr;
  26 static int      tmr_no = -1;    /* Currently selected timer */
  27 static int      pending_timer = -1;     /* For timer change operation */
  28 extern unsigned long seq_time;
  29
  30 static int      obsolete_api_used;
  31 static DEFINE_SPINLOCK(lock);
  32
  33 /*
  34  * Local counts for number of synth and MIDI devices. These are initialized
  35  * by the sequencer_open.
  36  */
  37 static int      max_mididev;
  38 static int      max_synthdev;
  39
  40 /*
  41  * The seq_mode gives the operating mode of the sequencer:
  42  *      1 = level1 (the default)
  43  *      2 = level2 (extended capabilities)
  44  */
  45
  46 #define SEQ_1   1
  47 #define SEQ_2   2
  48 static int      seq_mode = SEQ_1;
  49
  50 static DECLARE_WAIT_QUEUE_HEAD(seq_sleeper);
  51 static DECLARE_WAIT_QUEUE_HEAD(midi_sleeper);
  52
  53 static int      midi_opened[MAX_MIDI_DEV];
  54
  55 static int      midi_written[MAX_MIDI_DEV];
  56
  57 static unsigned long prev_input_time;
  58 static int      prev_event_time;
  59
  60 #include "tuning.h"
  61
  62 #define EV_SZ   8
  63 #define IEV_SZ  8
  64
  65 static unsigned char *queue;
  66 static unsigned char *iqueue;
  67
  68 static volatile int qhead, qtail, qlen;
  69 static volatile int iqhead, iqtail, iqlen;
  70 static volatile int seq_playing;
  71 static volatile int sequencer_busy;
  72 static int      output_threshold;
  73 static long     pre_event_timeout;
  74 static unsigned synth_open_mask;
  75
  76 static int      seq_queue(unsigned char *note, char nonblock);
  77 static void     seq_startplay(void);
  78 static int      seq_sync(void);
  79 static void     seq_reset(void);
  80
  81 #if MAX_SYNTH_DEV > 15
  82 #error Too many synthesizer devices enabled.
  83 #endif
  84
  85 int sequencer_read(int dev, struct file *file, char __user *buf, int count)
  86 {
  87         int c = count, p = 0;
  88         int ev_len;
  89         unsigned long flags;
  90
  91         dev = dev >> 4;
  92
  93         ev_len = seq_mode == SEQ_1 ? 4 : 8;
  94
  95         spin_lock_irqsave(&lock,flags);
  96
  97         if (!iqlen)
  98         {
  99                 spin_unlock_irqrestore(&lock,flags);
 100                 if (file->f_flags & O_NONBLOCK) {
 101                         return -EAGAIN;
 102                 }
 103
 104                 oss_broken_sleep_on(&midi_sleeper, pre_event_timeout);
 105                 spin_lock_irqsave(&lock,flags);
 106                 if (!iqlen)
 107                 {
 108                         spin_unlock_irqrestore(&lock,flags);
 109                         return 0;
 110                 }
 111         }
 112         while (iqlen && c >= ev_len)
 113         {
 114                 char *fixit = (char *) &iqueue[iqhead * IEV_SZ];
 115                 spin_unlock_irqrestore(&lock,flags);
 116                 if (copy_to_user(&(buf)[p], fixit, ev_len))
 117                         return count - c;
 118                 p += ev_len;
 119                 c -= ev_len;
 120
 121                 spin_lock_irqsave(&lock,flags);
 122                 iqhead = (iqhead + 1) % SEQ_MAX_QUEUE;
 123                 iqlen--;
 124         }
 125         spin_unlock_irqrestore(&lock,flags);
 126         return count - c;
 127 }
 128
 129 static void sequencer_midi_output(int dev)
 130 {
 131         /*
 132          * Currently NOP
 133          */
 134 }
 135
 136 void seq_copy_to_input(unsigned char *event_rec, int len)
 137 {
 138         unsigned long flags;
 139
 140         /*
 141          * Verify that the len is valid for the current mode.
 142          */
 143
 144         if (len != 4 && len != 8)
 145                 return;
 146         if ((seq_mode == SEQ_1) != (len == 4))
 147                 return;
 148
 149         if (iqlen >= (SEQ_MAX_QUEUE - 1))
 150                 return;         /* Overflow */
 151
 152         spin_lock_irqsave(&lock,flags);
 153         memcpy(&iqueue[iqtail * IEV_SZ], event_rec, len);
 154         iqlen++;
 155         iqtail = (iqtail + 1) % SEQ_MAX_QUEUE;
 156         wake_up(&midi_sleeper);
 157         spin_unlock_irqrestore(&lock,flags);
 158 }
 159 EXPORT_SYMBOL(seq_copy_to_input);
 160
 161 static void sequencer_midi_input(int dev, unsigned char data)
 162 {
 163         unsigned int tstamp;
 164         unsigned char event_rec[4];
 165
 166         if (data == 0xfe)       /* Ignore active sensing */
 167                 return;
 168
 169         tstamp = jiffies - seq_time;
 170
 171         if (tstamp != prev_input_time)
 172         {
 173                 tstamp = (tstamp << 8) | SEQ_WAIT;
 174                 seq_copy_to_input((unsigned char *) &tstamp, 4);
 175                 prev_input_time = tstamp;
 176         }
 177         event_rec[0] = SEQ_MIDIPUTC;
 178         event_rec[1] = data;
 179         event_rec[2] = dev;
 180         event_rec[3] = 0;
 181
 182         seq_copy_to_input(event_rec, 4);
 183 }
 184
 185 void seq_input_event(unsigned char *event_rec, int len)
 186 {
 187         unsigned long this_time;
 188
 189         if (seq_mode == SEQ_2)
 190                 this_time = tmr->get_time(tmr_no);
 191         else
 192                 this_time = jiffies - seq_time;
 193
 194         if (this_time != prev_input_time)
 195         {
 196                 unsigned char   tmp_event[8];
 197
 198                 tmp_event[0] = EV_TIMING;
 199                 tmp_event[1] = TMR_WAIT_ABS;
 200                 tmp_event[2] = 0;
 201                 tmp_event[3] = 0;
 202                 *(unsigned int *) &tmp_event[4] = this_time;
 203
 204                 seq_copy_to_input(tmp_event, 8);
 205                 prev_input_time = this_time;
 206         }
 207         seq_copy_to_input(event_rec, len);
 208 }
 209 EXPORT_SYMBOL(seq_input_event);
 210
 211 int sequencer_write(int dev, struct file *file, const char __user *buf, int count)
 212 {
 213         unsigned char event_rec[EV_SZ], ev_code;
 214         int p = 0, c, ev_size;
 215         int mode = translate_mode(file);
 216
 217         dev = dev >> 4;
 218
 219         if (mode == OPEN_READ)
 220                 return -EIO;
 221
 222         c = count;
 223
 224         while (c >= 4)
 225         {
 226                 if (copy_from_user((char *) event_rec, &(buf)[p], 4))
 227                         goto out;
 228                 ev_code = event_rec[0];
 229
 230                 if (ev_code == SEQ_FULLSIZE)
 231                 {
 232                         int err, fmt;
 233
 234                         dev = *(unsigned short *) &event_rec[2];
 235                         if (dev < 0 || dev >= max_synthdev || synth_devs[dev] == NULL)
 236                                 return -ENXIO;
 237
 238                         if (!(synth_open_mask & (1 << dev)))
 239                                 return -ENXIO;
 240
 241                         fmt = (*(short *) &event_rec[0]) & 0xffff;
 242                         err = synth_devs[dev]->load_patch(dev, fmt, buf + p, c, 0);
 243                         if (err < 0)
 244                                 return err;
 245
 246                         return err;
 247                 }
 248                 if (ev_code >= 128)
 249                 {
 250                         if (seq_mode == SEQ_2 && ev_code == SEQ_EXTENDED)
 251                         {
 252                                 printk(KERN_WARNING "Sequencer: Invalid level 2 event %x\n", ev_code);
 253                                 return -EINVAL;
 254                         }
 255                         ev_size = 8;
 256
 257                         if (c < ev_size)
 258                         {
 259                                 if (!seq_playing)
 260                                         seq_startplay();
 261                                 return count - c;
 262                         }
 263                         if (copy_from_user((char *)&event_rec[4],
 264                                            &(buf)[p + 4], 4))
 265                                 goto out;
 266
 267                 }
 268                 else
 269                 {
 270                         if (seq_mode == SEQ_2)
 271                         {
 272                                 printk(KERN_WARNING "Sequencer: 4 byte event in level 2 mode\n");
 273                                 return -EINVAL;
 274                         }
 275                         ev_size = 4;
 276
 277                         if (event_rec[0] != SEQ_MIDIPUTC)
 278                                 obsolete_api_used = 1;
 279                 }
 280
 281                 if (event_rec[0] == SEQ_MIDIPUTC)
 282                 {
 283                         if (!midi_opened[event_rec[2]])
 284                         {
 285                                 int err, mode;
 286                                 int dev = event_rec[2];
 287
 288                                 if (dev >= max_mididev || midi_devs[dev]==NULL)
 289                                 {
 290                                         /*printk("Sequencer Error: Nonexistent MIDI device %d\n", dev);*/
 291                                         return -ENXIO;
 292                                 }
 293                                 mode = translate_mode(file);
 294
 295                                 if ((err = midi_devs[dev]->open(dev, mode,
 296                                                                 sequencer_midi_input, sequencer_midi_output)) < 0)
 297                                 {
 298                                         seq_reset();
 299                                         printk(KERN_WARNING "Sequencer Error: Unable to open Midi #%d\n", dev);
 300                                         return err;
 301                                 }
 302                                 midi_opened[dev] = 1;
 303                         }
 304                 }
 305                 if (!seq_queue(event_rec, (file->f_flags & (O_NONBLOCK) ? 1 : 0)))
 306                 {
 307                         int processed = count - c;
 308
 309                         if (!seq_playing)
 310                                 seq_startplay();
 311
 312                         if (!processed && (file->f_flags & O_NONBLOCK))
 313                                 return -EAGAIN;
 314                         else
 315                                 return processed;
 316                 }
 317                 p += ev_size;
 318                 c -= ev_size;
 319         }
 320
 321         if (!seq_playing)
 322                 seq_startplay();
 323 out:
 324         return count;
 325 }
 326
 327 static int seq_queue(unsigned char *note, char nonblock)
 328 {
 329
 330         /*
 331          * Test if there is space in the queue
 332          */
 333
 334         if (qlen >= SEQ_MAX_QUEUE)
 335                 if (!seq_playing)
 336                         seq_startplay();        /*
 337                                                  * Give chance to drain the queue
 338                                                  */
 339
 340         if (!nonblock && qlen >= SEQ_MAX_QUEUE && !waitqueue_active(&seq_sleeper)) {
 341                 /*
 342                  * Sleep until there is enough space on the queue
 343                  */
 344                 oss_broken_sleep_on(&seq_sleeper, MAX_SCHEDULE_TIMEOUT);
 345         }
 346         if (qlen >= SEQ_MAX_QUEUE)
 347         {
 348                 return 0;       /*
 349                                  * To be sure
 350                                  */
 351         }
 352         memcpy(&queue[qtail * EV_SZ], note, EV_SZ);
 353
 354         qtail = (qtail + 1) % SEQ_MAX_QUEUE;
 355         qlen++;
 356
 357         return 1;
 358 }
 359
 360 static int extended_event(unsigned char *q)
 361 {
 362         int dev = q[2];
 363
 364         if (dev < 0 || dev >= max_synthdev)
 365                 return -ENXIO;
 366
 367         if (!(synth_open_mask & (1 << dev)))
 368                 return -ENXIO;
 369
 370         switch (q[1])
 371         {
 372                 case SEQ_NOTEOFF:
 373                         synth_devs[dev]->kill_note(dev, q[3], q[4], q[5]);
 374                         break;
 375
 376                 case SEQ_NOTEON:
 377                         if (q[4] > 127 && q[4] != 255)
 378                                 return 0;
 379
 380                         if (q[5] == 0)
 381                         {
 382                                 synth_devs[dev]->kill_note(dev, q[3], q[4], q[5]);
 383                                 break;
 384                         }
 385                         synth_devs[dev]->start_note(dev, q[3], q[4], q[5]);
 386                         break;
 387
 388                 case SEQ_PGMCHANGE:
 389                         synth_devs[dev]->set_instr(dev, q[3], q[4]);
 390                         break;
 391
 392                 case SEQ_AFTERTOUCH:
 393                         synth_devs[dev]->aftertouch(dev, q[3], q[4]);
 394                         break;
 395
 396                 case SEQ_BALANCE:
 397                         synth_devs[dev]->panning(dev, q[3], (char) q[4]);
 398                         break;
 399
 400                 case SEQ_CONTROLLER:
 401                         synth_devs[dev]->controller(dev, q[3], q[4], (short) (q[5] | (q[6] << 8)));
 402                         break;
 403
 404                 case SEQ_VOLMODE:
 405                         if (synth_devs[dev]->volume_method != NULL)
 406                                 synth_devs[dev]->volume_method(dev, q[3]);
 407                         break;
 408
 409                 default:
 410                         return -EINVAL;
 411         }
 412         return 0;
 413 }
 414
 415 static int find_voice(int dev, int chn, int note)
 416 {
 417         unsigned short key;
 418         int i;
 419
 420         key = (chn << 8) | (note + 1);
 421         for (i = 0; i < synth_devs[dev]->alloc.max_voice; i++)
 422                 if (synth_devs[dev]->alloc.map[i] == key)
 423                         return i;
 424         return -1;
 425 }
 426
 427 static int alloc_voice(int dev, int chn, int note)
 428 {
 429         unsigned short  key;
 430         int voice;
 431
 432         key = (chn << 8) | (note + 1);
 433
 434         voice = synth_devs[dev]->alloc_voice(dev, chn, note,
 435                                              &synth_devs[dev]->alloc);
 436         synth_devs[dev]->alloc.map[voice] = key;
 437         synth_devs[dev]->alloc.alloc_times[voice] =
 438                         synth_devs[dev]->alloc.timestamp++;
 439         return voice;
 440 }
 441
 442 static void seq_chn_voice_event(unsigned char *event_rec)
 443 {
 444 #define dev event_rec[1]
 445 #define cmd event_rec[2]
 446 #define chn event_rec[3]
 447 #define note event_rec[4]
 448 #define parm event_rec[5]
 449
 450         int voice = -1;
 451
 452         if ((int) dev > max_synthdev || synth_devs[dev] == NULL)
 453                 return;
 454         if (!(synth_open_mask & (1 << dev)))
 455                 return;
 456         if (!synth_devs[dev])
 457                 return;
 458
 459         if (seq_mode == SEQ_2)
 460         {
 461                 if (synth_devs[dev]->alloc_voice)
 462                         voice = find_voice(dev, chn, note);
 463
 464                 if (cmd == MIDI_NOTEON && parm == 0)
 465                 {
 466                         cmd = MIDI_NOTEOFF;
 467                         parm = 64;
 468                 }
 469         }
 470
 471         switch (cmd)
 472         {
 473                 case MIDI_NOTEON:
 474                         if (note > 127 && note != 255)  /* Not a seq2 feature */
 475                                 return;
 476
 477                         if (voice == -1 && seq_mode == SEQ_2 && synth_devs[dev]->alloc_voice)
 478                         {
 479                                 /* Internal synthesizer (FM, GUS, etc) */
 480                                 voice = alloc_voice(dev, chn, note);
 481                         }
 482                         if (voice == -1)
 483                                 voice = chn;
 484
 485                         if (seq_mode == SEQ_2 && (int) dev < num_synths)
 486                         {
 487                                 /*
 488                                  * The MIDI channel 10 is a percussive channel. Use the note
 489                                  * number to select the proper patch (128 to 255) to play.
 490                                  */
 491
 492                                 if (chn == 9)
 493                                 {
 494                                         synth_devs[dev]->set_instr(dev, voice, 128 + note);
 495                                         synth_devs[dev]->chn_info[chn].pgm_num = 128 + note;
 496                                 }
 497                                 synth_devs[dev]->setup_voice(dev, voice, chn);
 498                         }
 499                         synth_devs[dev]->start_note(dev, voice, note, parm);
 500                         break;
 501
 502                 case MIDI_NOTEOFF:
 503                         if (voice == -1)
 504                                 voice = chn;
 505                         synth_devs[dev]->kill_note(dev, voice, note, parm);
 506                         break;
 507
 508                 case MIDI_KEY_PRESSURE:
 509                         if (voice == -1)
 510                                 voice = chn;
 511                         synth_devs[dev]->aftertouch(dev, voice, parm);
 512                         break;
 513
 514                 default:;
 515         }
 516 #undef dev
 517 #undef cmd
 518 #undef chn
 519 #undef note
 520 #undef parm
 521 }
 522
 523
 524 static void seq_chn_common_event(unsigned char *event_rec)
 525 {
 526         unsigned char dev = event_rec[1];
 527         unsigned char cmd = event_rec[2];
 528         unsigned char chn = event_rec[3];
 529         unsigned char p1 = event_rec[4];
 530
 531         /* unsigned char p2 = event_rec[5]; */
 532         unsigned short w14 = *(short *) &event_rec[6];
 533
 534         if ((int) dev > max_synthdev || synth_devs[dev] == NULL)
 535                 return;
 536         if (!(synth_open_mask & (1 << dev)))
 537                 return;
 538         if (!synth_devs[dev])
 539                 return;
 540
 541         switch (cmd)
 542         {
 543                 case MIDI_PGM_CHANGE:
 544                         if (seq_mode == SEQ_2)
 545                         {
 546                                 if (chn > 15)
 547                                         break;
 548
 549                                 synth_devs[dev]->chn_info[chn].pgm_num = p1;
 550                                 if ((int) dev >= num_synths)
 551                                         synth_devs[dev]->set_instr(dev, chn, p1);
 552                         }
 553                         else
 554                                 synth_devs[dev]->set_instr(dev, chn, p1);
 555
 556                         break;
 557
 558                 case MIDI_CTL_CHANGE:
 559                         if (seq_mode == SEQ_2)
 560                         {
 561                                 if (chn > 15 || p1 > 127)
 562                                         break;
 563
 564                                 synth_devs[dev]->chn_info[chn].controllers[p1] = w14 & 0x7f;
 565
 566                                 if (p1 < 32)    /* Setting MSB should clear LSB to 0 */
 567                                         synth_devs[dev]->chn_info[chn].controllers[p1 + 32] = 0;
 568
 569                                 if ((int) dev < num_synths)
 570                                 {
 571                                         int val = w14 & 0x7f;
 572                                         int i, key;
 573
 574                                         if (p1 < 64)    /* Combine MSB and LSB */
 575                                         {
 576                                                 val = ((synth_devs[dev]->
 577                                                         chn_info[chn].controllers[p1 & ~32] & 0x7f) << 7)
 578                                                         | (synth_devs[dev]->
 579                                                         chn_info[chn].controllers[p1 | 32] & 0x7f);
 580                                                 p1 &= ~32;
 581                                         }
 582                                         /* Handle all playing notes on this channel */
 583
 584                                         key = ((int) chn << 8);
 585
 586                                         for (i = 0; i < synth_devs[dev]->alloc.max_voice; i++)
 587                                                 if ((synth_devs[dev]->alloc.map[i] & 0xff00) == key)
 588                                                         synth_devs[dev]->controller(dev, i, p1, val);
 589                                 }
 590                                 else
 591                                         synth_devs[dev]->controller(dev, chn, p1, w14);
 592                         }
 593                         else    /* Mode 1 */
 594                                 synth_devs[dev]->controller(dev, chn, p1, w14);
 595                         break;
 596
 597                 case MIDI_PITCH_BEND:
 598                         if (seq_mode == SEQ_2)
 599                         {
 600                                 if (chn > 15)
 601                                         break;
 602
 603                                 synth_devs[dev]->chn_info[chn].bender_value = w14;
 604
 605                                 if ((int) dev < num_synths)
 606                                 {
 607                                         /* Handle all playing notes on this channel */
 608                                         int i, key;
 609
 610                                         key = (chn << 8);
 611
 612                                         for (i = 0; i < synth_devs[dev]->alloc.max_voice; i++)
 613                                                 if ((synth_devs[dev]->alloc.map[i] & 0xff00) == key)
 614                                                         synth_devs[dev]->bender(dev, i, w14);
 615                                 }
 616                                 else
 617                                         synth_devs[dev]->bender(dev, chn, w14);
 618                         }
 619                         else    /* MODE 1 */
 620                                 synth_devs[dev]->bender(dev, chn, w14);
 621                         break;
 622
 623                 default:;
 624         }
 625 }
 626
 627 static int seq_timing_event(unsigned char *event_rec)
 628 {
 629         unsigned char cmd = event_rec[1];
 630         unsigned int parm = *(int *) &event_rec[4];
 631
 632         if (seq_mode == SEQ_2)
 633         {
 634                 int ret;
 635
 636                 if ((ret = tmr->event(tmr_no, event_rec)) == TIMER_ARMED)
 637                         if ((SEQ_MAX_QUEUE - qlen) >= output_threshold)
 638                                 wake_up(&seq_sleeper);
 639                 return ret;
 640         }
 641         switch (cmd)
 642         {
 643                 case TMR_WAIT_REL:
 644                         parm += prev_event_time;
 645
 646                         /*
 647                          * NOTE!  No break here. Execution of TMR_WAIT_REL continues in the
 648                          * next case (TMR_WAIT_ABS)
 649                          */
 650
 651                 case TMR_WAIT_ABS:
 652                         if (parm > 0)
 653                         {
 654                                 long time;
 655
 656                                 time = parm;
 657                                 prev_event_time = time;
 658
 659                                 seq_playing = 1;
 660                                 request_sound_timer(time);
 661
 662                                 if ((SEQ_MAX_QUEUE - qlen) >= output_threshold)
 663                                         wake_up(&seq_sleeper);
 664                                 return TIMER_ARMED;
 665                         }
 666                         break;
 667
 668                 case TMR_START:
 669                         seq_time = jiffies;
 670                         prev_input_time = 0;
 671                         prev_event_time = 0;
 672                         break;
 673
 674                 case TMR_STOP:
 675                         break;
 676
 677                 case TMR_CONTINUE:
 678                         break;
 679
 680                 case TMR_TEMPO:
 681                         break;
 682
 683                 case TMR_ECHO:
 684                         if (seq_mode == SEQ_2)
 685                                 seq_copy_to_input(event_rec, 8);
 686                         else
 687                         {
 688                                 parm = (parm << 8 | SEQ_ECHO);
 689                                 seq_copy_to_input((unsigned char *) &parm, 4);
 690                         }
 691                         break;
 692
 693                 default:;
 694         }
 695
 696         return TIMER_NOT_ARMED;
 697 }
 698
 699 static void seq_local_event(unsigned char *event_rec)
 700 {
 701         unsigned char   cmd = event_rec[1];
 702         unsigned int    parm = *((unsigned int *) &event_rec[4]);
 703
 704         switch (cmd)
 705         {
 706                 case LOCL_STARTAUDIO:
 707                         DMAbuf_start_devices(parm);
 708                         break;
 709
 710                 default:;
 711         }
 712 }
 713
 714 static void seq_sysex_message(unsigned char *event_rec)
 715 {
 716         unsigned int dev = event_rec[1];
 717         int i, l = 0;
 718         unsigned char  *buf = &event_rec[2];
 719
 720         if (dev > max_synthdev)
 721                 return;
 722         if (!(synth_open_mask & (1 << dev)))
 723                 return;
 724         if (!synth_devs[dev])
 725                 return;
 726
 727         l = 0;
 728         for (i = 0; i < 6 && buf[i] != 0xff; i++)
 729                 l = i + 1;
 730
 731         if (!synth_devs[dev]->send_sysex)
 732                 return;
 733         if (l > 0)
 734                 synth_devs[dev]->send_sysex(dev, buf, l);
 735 }
 736
 737 static int play_event(unsigned char *q)
 738 {
 739         /*
 740          * NOTE! This routine returns
 741          *   0 = normal event played.
 742          *   1 = Timer armed. Suspend playback until timer callback.
 743          *   2 = MIDI output buffer full. Restore queue and suspend until timer
 744          */
 745         unsigned int *delay;
 746
 747         switch (q[0])
 748         {
 749                 case SEQ_NOTEOFF:
 750                         if (synth_open_mask & (1 << 0))
 751                                 if (synth_devs[0])
 752                                         synth_devs[0]->kill_note(0, q[1], 255, q[3]);
 753                         break;
 754
 755                 case SEQ_NOTEON:
 756                         if (q[4] < 128 || q[4] == 255)
 757                                 if (synth_open_mask & (1 << 0))
 758                                         if (synth_devs[0])
 759                                                 synth_devs[0]->start_note(0, q[1], q[2], q[3]);
 760                         break;
 761
 762                 case SEQ_WAIT:
 763                         delay = (unsigned int *) q;     /*
 764                                                          * Bytes 1 to 3 are containing the *
 765                                                          * delay in 'ticks'
 766                                                          */
 767                         *delay = (*delay >> 8) & 0xffffff;
 768
 769                         if (*delay > 0)
 770                         {
 771                                 long time;
 772
 773                                 seq_playing = 1;
 774                                 time = *delay;
 775                                 prev_event_time = time;
 776
 777                                 request_sound_timer(time);
 778
 779                                 if ((SEQ_MAX_QUEUE - qlen) >= output_threshold)
 780                                         wake_up(&seq_sleeper);
 781                                 /*
 782                                  * The timer is now active and will reinvoke this function
 783                                  * after the timer expires. Return to the caller now.
 784                                  */
 785                                 return 1;
 786                         }
 787                         break;
 788
 789                 case SEQ_PGMCHANGE:
 790                         if (synth_open_mask & (1 << 0))
 791                                 if (synth_devs[0])
 792                                         synth_devs[0]->set_instr(0, q[1], q[2]);
 793                         break;
 794
 795                 case SEQ_SYNCTIMER:     /*
 796                                          * Reset timer
 797                                          */
 798                         seq_time = jiffies;
 799                         prev_input_time = 0;
 800                         prev_event_time = 0;
 801                         break;
 802
 803                 case SEQ_MIDIPUTC:      /*
 804                                          * Put a midi character
 805                                          */
 806                         if (midi_opened[q[2]])
 807                         {
 808                                 int dev;
 809
 810                                 dev = q[2];
 811
 812                                 if (dev < 0 || dev >= num_midis || midi_devs[dev] == NULL)
 813                                         break;
 814
 815                                 if (!midi_devs[dev]->outputc(dev, q[1]))
 816                                 {
 817                                         /*
 818                                          * Output FIFO is full. Wait one timer cycle and try again.
 819                                          */
 820
 821                                         seq_playing = 1;
 822                                         request_sound_timer(-1);
 823                                         return 2;
 824                                 }
 825                                 else
 826                                         midi_written[dev] = 1;
 827                         }
 828                         break;
 829
 830                 case SEQ_ECHO:
 831                         seq_copy_to_input(q, 4);        /*
 832                                                          * Echo back to the process
 833                                                          */
 834                         break;
 835
 836                 case SEQ_PRIVATE:
 837                         if ((int) q[1] < max_synthdev)
 838                                 synth_devs[q[1]]->hw_control(q[1], q);
 839                         break;
 840
 841                 case SEQ_EXTENDED:
 842                         extended_event(q);
 843                         break;
 844
 845                 case EV_CHN_VOICE:
 846                         seq_chn_voice_event(q);
 847                         break;
 848
 849                 case EV_CHN_COMMON:
 850                         seq_chn_common_event(q);
 851                         break;
 852
 853                 case EV_TIMING:
 854                         if (seq_timing_event(q) == TIMER_ARMED)
 855                         {
 856                                 return 1;
 857                         }
 858                         break;
 859
 860                 case EV_SEQ_LOCAL:
 861                         seq_local_event(q);
 862                         break;
 863
 864                 case EV_SYSEX:
 865                         seq_sysex_message(q);
 866                         break;
 867
 868                 default:;
 869         }
 870         return 0;
 871 }
 872
 873 /* called also as timer in irq context */
 874 static void seq_startplay(void)
 875 {
 876         int this_one, action;
 877         unsigned long flags;
 878
 879         while (qlen > 0)
 880         {
 881
 882                 spin_lock_irqsave(&lock,flags);
 883                 qhead = ((this_one = qhead) + 1) % SEQ_MAX_QUEUE;
 884                 qlen--;
 885                 spin_unlock_irqrestore(&lock,flags);
 886
 887                 seq_playing = 1;
 888
 889                 if ((action = play_event(&queue[this_one * EV_SZ])))
 890                 {               /* Suspend playback. Next timer routine invokes this routine again */
 891                         if (action == 2)
 892                         {
 893                                 qlen++;
 894                                 qhead = this_one;
 895                         }
 896                         return;
 897                 }
 898         }
 899
 900         seq_playing = 0;
 901
 902         if ((SEQ_MAX_QUEUE - qlen) >= output_threshold)
 903                 wake_up(&seq_sleeper);
 904 }
 905
 906 static void reset_controllers(int dev, unsigned char *controller, int update_dev)
 907 {
 908         int i;
 909         for (i = 0; i < 128; i++)
 910                 controller[i] = ctrl_def_values[i];
 911 }
 912
 913 static void setup_mode2(void)
 914 {
 915         int dev;
 916
 917         max_synthdev = num_synths;
 918
 919         for (dev = 0; dev < num_midis; dev++)
 920         {
 921                 if (midi_devs[dev] && midi_devs[dev]->converter != NULL)
 922                 {
 923                         synth_devs[max_synthdev++] = midi_devs[dev]->converter;
 924                 }
 925         }
 926
 927         for (dev = 0; dev < max_synthdev; dev++)
 928         {
 929                 int chn;
 930
 931                 synth_devs[dev]->sysex_ptr = 0;
 932                 synth_devs[dev]->emulation = 0;
 933
 934                 for (chn = 0; chn < 16; chn++)
 935                 {
 936                         synth_devs[dev]->chn_info[chn].pgm_num = 0;
 937                         reset_controllers(dev,
 938                                 synth_devs[dev]->chn_info[chn].controllers,0);
 939                         synth_devs[dev]->chn_info[chn].bender_value = (1 << 7); /* Neutral */
 940                         synth_devs[dev]->chn_info[chn].bender_range = 200;
 941                 }
 942         }
 943         max_mididev = 0;
 944         seq_mode = SEQ_2;
 945 }
 946
 947 int sequencer_open(int dev, struct file *file)
 948 {
 949         int retval, mode, i;
 950         int level, tmp;
 951
 952         if (!sequencer_ok)
 953                 sequencer_init();
 954
 955         level = ((dev & 0x0f) == SND_DEV_SEQ2) ? 2 : 1;
 956
 957         dev = dev >> 4;
 958         mode = translate_mode(file);
 959
 960         if (!sequencer_ok)
 961         {
 962 /*              printk("Sound card: sequencer not initialized\n");*/
 963                 return -ENXIO;
 964         }
 965         if (dev)                /* Patch manager device (obsolete) */
 966                 return -ENXIO;
 967
 968         if(synth_devs[dev] == NULL)
 969                 request_module("synth0");
 970
 971         if (mode == OPEN_READ)
 972         {
 973                 if (!num_midis)
 974                 {
 975                         /*printk("Sequencer: No MIDI devices. Input not possible\n");*/
 976                         sequencer_busy = 0;
 977                         return -ENXIO;
 978                 }
 979         }
 980         if (sequencer_busy)
 981         {
 982                 return -EBUSY;
 983         }
 984         sequencer_busy = 1;
 985         obsolete_api_used = 0;
 986
 987         max_mididev = num_midis;
 988         max_synthdev = num_synths;
 989         pre_event_timeout = MAX_SCHEDULE_TIMEOUT;
 990         seq_mode = SEQ_1;
 991
 992         if (pending_timer != -1)
 993         {
 994                 tmr_no = pending_timer;
 995                 pending_timer = -1;
 996         }
 997         if (tmr_no == -1)       /* Not selected yet */
 998         {
 999                 int i, best;
1000
1001                 best = -1;
1002                 for (i = 0; i < num_sound_timers; i++)
1003                         if (sound_timer_devs[i] && sound_timer_devs[i]->priority > best)
1004                         {
1005                                 tmr_no = i;
1006                                 best = sound_timer_devs[i]->priority;
1007                         }
1008                 if (tmr_no == -1)       /* Should not be */
1009                         tmr_no = 0;
1010         }
1011         tmr = sound_timer_devs[tmr_no];
1012
1013         if (level == 2)
1014         {
1015                 if (tmr == NULL)
1016                 {
1017                         /*printk("sequencer: No timer for level 2\n");*/
1018                         sequencer_busy = 0;
1019                         return -ENXIO;
1020                 }
1021                 setup_mode2();
1022         }
1023         if (!max_synthdev && !max_mididev)
1024         {
1025                 sequencer_busy=0;
1026                 return -ENXIO;
1027         }
1028
1029         synth_open_mask = 0;
1030
1031         for (i = 0; i < max_mididev; i++)
1032         {
1033                 midi_opened[i] = 0;
1034                 midi_written[i] = 0;
1035         }
1036
1037         for (i = 0; i < max_synthdev; i++)
1038         {
1039                 if (synth_devs[i]==NULL)
1040                         continue;
1041
1042                 if (!try_module_get(synth_devs[i]->owner))
1043                         continue;
1044
1045                 if ((tmp = synth_devs[i]->open(i, mode)) < 0)
1046                 {
1047                         printk(KERN_WARNING "Sequencer: Warning! Cannot open synth device #%d (%d)\n", i, tmp);
1048                         if (synth_devs[i]->midi_dev)
1049                                 printk(KERN_WARNING "(Maps to MIDI dev #%d)\n", synth_devs[i]->midi_dev);
1050                 }
1051                 else
1052                 {
1053                         synth_open_mask |= (1 << i);
1054                         if (synth_devs[i]->midi_dev)
1055                                 midi_opened[synth_devs[i]->midi_dev] = 1;
1056                 }
1057         }
1058
1059         seq_time = jiffies;
1060
1061         prev_input_time = 0;
1062         prev_event_time = 0;
1063
1064         if (seq_mode == SEQ_1 && (mode == OPEN_READ || mode == OPEN_READWRITE))
1065         {
1066                 /*
1067                  * Initialize midi input devices
1068                  */
1069
1070                 for (i = 0; i < max_mididev; i++)
1071                         if (!midi_opened[i] && midi_devs[i])
1072                         {
1073                                 if (!try_module_get(midi_devs[i]->owner))
1074                                         continue;
1075
1076                                 if ((retval = midi_devs[i]->open(i, mode,
1077                                         sequencer_midi_input, sequencer_midi_output)) >= 0)
1078                                 {
1079                                         midi_opened[i] = 1;
1080                                 }
1081                         }
1082         }
1083
1084         if (seq_mode == SEQ_2) {
1085                 if (try_module_get(tmr->owner))
1086                         tmr->open(tmr_no, seq_mode);
1087         }
1088
1089         init_waitqueue_head(&seq_sleeper);
1090         init_waitqueue_head(&midi_sleeper);
1091         output_threshold = SEQ_MAX_QUEUE / 2;
1092
1093         return 0;
1094 }
1095
1096 static void seq_drain_midi_queues(void)
1097 {
1098         int i, n;
1099
1100         /*
1101          * Give the Midi drivers time to drain their output queues
1102          */
1103
1104         n = 1;
1105
1106         while (!signal_pending(current) && n)
1107         {
1108                 n = 0;
1109
1110                 for (i = 0; i < max_mididev; i++)
1111                         if (midi_opened[i] && midi_written[i])
1112                                 if (midi_devs[i]->buffer_status != NULL)
1113                                         if (midi_devs[i]->buffer_status(i))
1114                                                 n++;
1115
1116                 /*
1117                  * Let's have a delay
1118                  */
1119
1120                 if (n)
1121                         oss_broken_sleep_on(&seq_sleeper, HZ/10);
1122         }
1123 }
1124
1125 void sequencer_release(int dev, struct file *file)
1126 {
1127         int i;
1128         int mode = translate_mode(file);
1129
1130         dev = dev >> 4;
1131
1132         /*
1133          * Wait until the queue is empty (if we don't have nonblock)
1134          */
1135
1136         if (mode != OPEN_READ && !(file->f_flags & O_NONBLOCK))
1137         {
1138                 while (!signal_pending(current) && qlen > 0)
1139                 {
1140                         seq_sync();
1141                         oss_broken_sleep_on(&seq_sleeper, 3*HZ);
1142                         /* Extra delay */
1143                 }
1144         }
1145
1146         if (mode != OPEN_READ)
1147                 seq_drain_midi_queues();        /*
1148                                                  * Ensure the output queues are empty
1149                                                  */
1150         seq_reset();
1151         if (mode != OPEN_READ)
1152                 seq_drain_midi_queues();        /*
1153                                                  * Flush the all notes off messages
1154                                                  */
1155
1156         for (i = 0; i < max_synthdev; i++)
1157         {
1158                 if (synth_open_mask & (1 << i)) /*
1159                                                  * Actually opened
1160                                                  */
1161                         if (synth_devs[i])
1162                         {
1163                                 synth_devs[i]->close(i);
1164
1165                                 module_put(synth_devs[i]->owner);
1166
1167                                 if (synth_devs[i]->midi_dev)
1168                                         midi_opened[synth_devs[i]->midi_dev] = 0;
1169                         }
1170         }
1171
1172         for (i = 0; i < max_mididev; i++)
1173         {
1174                 if (midi_opened[i]) {
1175                         midi_devs[i]->close(i);
1176                         module_put(midi_devs[i]->owner);
1177                 }
1178         }
1179
1180         if (seq_mode == SEQ_2) {
1181                 tmr->close(tmr_no);
1182                 module_put(tmr->owner);
1183         }
1184
1185         if (obsolete_api_used)
1186                 printk(KERN_WARNING "/dev/music: Obsolete (4 byte) API was used by %s\n", current->comm);
1187         sequencer_busy = 0;
1188 }
1189
1190 static int seq_sync(void)
1191 {
1192         if (qlen && !seq_playing && !signal_pending(current))
1193                 seq_startplay();
1194
1195         if (qlen > 0)
1196                 oss_broken_sleep_on(&seq_sleeper, HZ);
1197         return qlen;
1198 }
1199
1200 static void midi_outc(int dev, unsigned char data)
1201 {
1202         /*
1203          * NOTE! Calls sleep(). Don't call this from interrupt.
1204          */
1205
1206         int n;
1207         unsigned long flags;
1208
1209         /*
1210          * This routine sends one byte to the Midi channel.
1211          * If the output FIFO is full, it waits until there
1212          * is space in the queue
1213          */
1214
1215         n = 3 * HZ;             /* Timeout */
1216
1217         spin_lock_irqsave(&lock,flags);
1218         while (n && !midi_devs[dev]->outputc(dev, data)) {
1219                 oss_broken_sleep_on(&seq_sleeper, HZ/25);
1220                 n--;
1221         }
1222         spin_unlock_irqrestore(&lock,flags);
1223 }
1224
1225 static void seq_reset(void)
1226 {
1227         /*
1228          * NOTE! Calls sleep(). Don't call this from interrupt.
1229          */
1230
1231         int i;
1232         int chn;
1233         unsigned long flags;
1234
1235         sound_stop_timer();
1236
1237         seq_time = jiffies;
1238         prev_input_time = 0;
1239         prev_event_time = 0;
1240
1241         qlen = qhead = qtail = 0;
1242         iqlen = iqhead = iqtail = 0;
1243
1244         for (i = 0; i < max_synthdev; i++)
1245                 if (synth_open_mask & (1 << i))
1246                         if (synth_devs[i])
1247                                 synth_devs[i]->reset(i);
1248
1249         if (seq_mode == SEQ_2)
1250         {
1251                 for (chn = 0; chn < 16; chn++)
1252                         for (i = 0; i < max_synthdev; i++)
1253                                 if (synth_open_mask & (1 << i))
1254                                         if (synth_devs[i])
1255                                         {
1256                                                 synth_devs[i]->controller(i, chn, 123, 0);      /* All notes off */
1257                                                 synth_devs[i]->controller(i, chn, 121, 0);      /* Reset all ctl */
1258                                                 synth_devs[i]->bender(i, chn, 1 << 13); /* Bender off */
1259                                         }
1260         }
1261         else    /* seq_mode == SEQ_1 */
1262         {
1263                 for (i = 0; i < max_mididev; i++)
1264                         if (midi_written[i])    /*
1265                                                  * Midi used. Some notes may still be playing
1266                                                  */
1267                         {
1268                                 /*
1269                                  *      Sending just a ACTIVE SENSING message should be enough to stop all
1270                                  *      playing notes. Since there are devices not recognizing the
1271                                  *      active sensing, we have to send some all notes off messages also.
1272                                  */
1273                                 midi_outc(i, 0xfe);
1274
1275                                 for (chn = 0; chn < 16; chn++)
1276                                 {
1277                                         midi_outc(i, (unsigned char) (0xb0 + (chn & 0x0f)));            /* control change */
1278                                         midi_outc(i, 0x7b);     /* All notes off */
1279                                         midi_outc(i, 0);        /* Dummy parameter */
1280                                 }
1281
1282                                 midi_devs[i]->close(i);
1283
1284                                 midi_written[i] = 0;
1285                                 midi_opened[i] = 0;
1286                         }
1287         }
1288
1289         seq_playing = 0;
1290
1291         spin_lock_irqsave(&lock,flags);
1292
1293         if (waitqueue_active(&seq_sleeper)) {
1294                 /*      printk( "Sequencer Warning: Unexpected sleeping process - Waking up\n"); */
1295                 wake_up(&seq_sleeper);
1296         }
1297         spin_unlock_irqrestore(&lock,flags);
1298 }
1299
1300 static void seq_panic(void)
1301 {
1302         /*
1303          * This routine is called by the application in case the user
1304          * wants to reset the system to the default state.
1305          */
1306
1307         seq_reset();
1308
1309         /*
1310          * Since some of the devices don't recognize the active sensing and
1311          * all notes off messages, we have to shut all notes manually.
1312          *
1313          *      TO BE IMPLEMENTED LATER
1314          */
1315
1316         /*
1317          * Also return the controllers to their default states
1318          */
1319 }
1320
1321 int sequencer_ioctl(int dev, struct file *file, unsigned int cmd, void __user *arg)
1322 {
1323         int midi_dev, orig_dev, val, err;
1324         int mode = translate_mode(file);
1325         struct synth_info inf;
1326         struct seq_event_rec event_rec;
1327         unsigned long flags;
1328         int __user *p = arg;
1329
1330         orig_dev = dev = dev >> 4;
1331
1332         switch (cmd)
1333         {
1334                 case SNDCTL_TMR_TIMEBASE:
1335                 case SNDCTL_TMR_TEMPO:
1336                 case SNDCTL_TMR_START:
1337                 case SNDCTL_TMR_STOP:
1338                 case SNDCTL_TMR_CONTINUE:
1339                 case SNDCTL_TMR_METRONOME:
1340                 case SNDCTL_TMR_SOURCE:
1341                         if (seq_mode != SEQ_2)
1342                                 return -EINVAL;
1343                         return tmr->ioctl(tmr_no, cmd, arg);
1344
1345                 case SNDCTL_TMR_SELECT:
1346                         if (seq_mode != SEQ_2)
1347                                 return -EINVAL;
1348                         if (get_user(pending_timer, p))
1349                                 return -EFAULT;
1350                         if (pending_timer < 0 || pending_timer >= num_sound_timers || sound_timer_devs[pending_timer] == NULL)
1351                         {
1352                                 pending_timer = -1;
1353                                 return -EINVAL;
1354                         }
1355                         val = pending_timer;
1356                         break;
1357
1358                 case SNDCTL_SEQ_PANIC:
1359                         seq_panic();
1360                         return -EINVAL;
1361
1362                 case SNDCTL_SEQ_SYNC:
1363                         if (mode == OPEN_READ)
1364                                 return 0;
1365                         while (qlen > 0 && !signal_pending(current))
1366                                 seq_sync();
1367                         return qlen ? -EINTR : 0;
1368
1369                 case SNDCTL_SEQ_RESET:
1370                         seq_reset();
1371                         return 0;
1372
1373                 case SNDCTL_SEQ_TESTMIDI:
1374                         if (__get_user(midi_dev, p))
1375                                 return -EFAULT;
1376                         if (midi_dev < 0 || midi_dev >= max_mididev || !midi_devs[midi_dev])
1377                                 return -ENXIO;
1378
1379                         if (!midi_opened[midi_dev] &&
1380                                 (err = midi_devs[midi_dev]->open(midi_dev, mode, sequencer_midi_input,
1381                                                      sequencer_midi_output)) < 0)
1382                                 return err;
1383                         midi_opened[midi_dev] = 1;
1384                         return 0;
1385
1386                 case SNDCTL_SEQ_GETINCOUNT:
1387                         if (mode == OPEN_WRITE)
1388                                 return 0;
1389                         val = iqlen;
1390                         break;
1391
1392                 case SNDCTL_SEQ_GETOUTCOUNT:
1393                         if (mode == OPEN_READ)
1394                                 return 0;
1395                         val = SEQ_MAX_QUEUE - qlen;
1396                         break;
1397
1398                 case SNDCTL_SEQ_GETTIME:
1399                         if (seq_mode == SEQ_2)
1400                                 return tmr->ioctl(tmr_no, cmd, arg);
1401                         val = jiffies - seq_time;
1402                         break;
1403
1404                 case SNDCTL_SEQ_CTRLRATE:
1405                         /*
1406                          * If *arg == 0, just return the current rate
1407                          */
1408                         if (seq_mode == SEQ_2)
1409                                 return tmr->ioctl(tmr_no, cmd, arg);
1410
1411                         if (get_user(val, p))
1412                                 return -EFAULT;
1413                         if (val != 0)
1414                                 return -EINVAL;
1415                         val = HZ;
1416                         break;
1417
1418                 case SNDCTL_SEQ_RESETSAMPLES:
1419                 case SNDCTL_SYNTH_REMOVESAMPLE:
1420                 case SNDCTL_SYNTH_CONTROL:
1421                         if (get_user(dev, p))
1422                                 return -EFAULT;
1423                         if (dev < 0 || dev >= num_synths || synth_devs[dev] == NULL)
1424                                 return -ENXIO;
1425                         if (!(synth_open_mask & (1 << dev)) && !orig_dev)
1426                                 return -EBUSY;
1427                         return synth_devs[dev]->ioctl(dev, cmd, arg);
1428
1429                 case SNDCTL_SEQ_NRSYNTHS:
1430                         val = max_synthdev;
1431                         break;
1432
1433                 case SNDCTL_SEQ_NRMIDIS:
1434                         val = max_mididev;
1435                         break;
1436
1437                 case SNDCTL_SYNTH_MEMAVL:
1438                         if (get_user(dev, p))
1439                                 return -EFAULT;
1440                         if (dev < 0 || dev >= num_synths || synth_devs[dev] == NULL)
1441                                 return -ENXIO;
1442                         if (!(synth_open_mask & (1 << dev)) && !orig_dev)
1443                                 return -EBUSY;
1444                         val = synth_devs[dev]->ioctl(dev, cmd, arg);
1445                         break;
1446
1447                 case SNDCTL_FM_4OP_ENABLE:
1448                         if (get_user(dev, p))
1449                                 return -EFAULT;
1450                         if (dev < 0 || dev >= num_synths || synth_devs[dev] == NULL)
1451                                 return -ENXIO;
1452                         if (!(synth_open_mask & (1 << dev)))
1453                                 return -ENXIO;
1454                         synth_devs[dev]->ioctl(dev, cmd, arg);
1455                         return 0;
1456
1457                 case SNDCTL_SYNTH_INFO:
1458                         if (get_user(dev, &((struct synth_info __user *)arg)->device))
1459                                 return -EFAULT;
1460                         if (dev < 0 || dev >= max_synthdev)
1461                                 return -ENXIO;
1462                         if (!(synth_open_mask & (1 << dev)) && !orig_dev)
1463                                 return -EBUSY;
1464                         return synth_devs[dev]->ioctl(dev, cmd, arg);
1465
1466                 /* Like SYNTH_INFO but returns ID in the name field */
1467                 case SNDCTL_SYNTH_ID:
1468                         if (get_user(dev, &((struct synth_info __user *)arg)->device))
1469                                 return -EFAULT;
1470                         if (dev < 0 || dev >= max_synthdev)
1471                                 return -ENXIO;
1472                         if (!(synth_open_mask & (1 << dev)) && !orig_dev)
1473                                 return -EBUSY;
1474                         memcpy(&inf, synth_devs[dev]->info, sizeof(inf));
1475                         strlcpy(inf.name, synth_devs[dev]->id, sizeof(inf.name));
1476                         inf.device = dev;
1477                         return copy_to_user(arg, &inf, sizeof(inf))?-EFAULT:0;
1478
1479                 case SNDCTL_SEQ_OUTOFBAND:
1480                         if (copy_from_user(&event_rec, arg, sizeof(event_rec)))
1481                                 return -EFAULT;
1482                         spin_lock_irqsave(&lock,flags);
1483                         play_event(event_rec.arr);
1484                         spin_unlock_irqrestore(&lock,flags);
1485                         return 0;
1486
1487                 case SNDCTL_MIDI_INFO:
1488                         if (get_user(dev, &((struct midi_info __user *)arg)->device))
1489                                 return -EFAULT;
1490                         if (dev < 0 || dev >= max_mididev || !midi_devs[dev])
1491                                 return -ENXIO;
1492                         midi_devs[dev]->info.device = dev;
1493                         return copy_to_user(arg, &midi_devs[dev]->info, sizeof(struct midi_info))?-EFAULT:0;
1494
1495                 case SNDCTL_SEQ_THRESHOLD:
1496                         if (get_user(val, p))
1497                                 return -EFAULT;
1498                         if (val < 1)
1499                                 val = 1;
1500                         if (val >= SEQ_MAX_QUEUE)
1501                                 val = SEQ_MAX_QUEUE - 1;
1502                         output_threshold = val;
1503                         return 0;
1504
1505                 case SNDCTL_MIDI_PRETIME:
1506                         if (get_user(val, p))
1507                                 return -EFAULT;
1508                         if (val < 0)
1509                                 val = 0;
1510                         val = (HZ * val) / 10;
1511                         pre_event_timeout = val;
1512                         break;
1513
1514                 default:
1515                         if (mode == OPEN_READ)
1516                                 return -EIO;
1517                         if (!synth_devs[0])
1518                                 return -ENXIO;
1519                         if (!(synth_open_mask & (1 << 0)))
1520                                 return -ENXIO;
1521                         if (!synth_devs[0]->ioctl)
1522                                 return -EINVAL;
1523                         return synth_devs[0]->ioctl(0, cmd, arg);
1524         }
1525         return put_user(val, p);
1526 }
1527
1528 /* No kernel lock - we're using the global irq lock here */
1529 unsigned int sequencer_poll(int dev, struct file *file, poll_table * wait)
1530 {
1531         unsigned long flags;
1532         unsigned int mask = 0;
1533
1534         dev = dev >> 4;
1535
1536         spin_lock_irqsave(&lock,flags);
1537         /* input */
1538         poll_wait(file, &midi_sleeper, wait);
1539         if (iqlen)
1540                 mask |= POLLIN | POLLRDNORM;
1541
1542         /* output */
1543         poll_wait(file, &seq_sleeper, wait);
1544         if ((SEQ_MAX_QUEUE - qlen) >= output_threshold)
1545                 mask |= POLLOUT | POLLWRNORM;
1546         spin_unlock_irqrestore(&lock,flags);
1547         return mask;
1548 }
1549
1550
1551 void sequencer_timer(unsigned long dummy)
1552 {
1553         seq_startplay();
1554 }
1555 EXPORT_SYMBOL(sequencer_timer);
1556
1557 int note_to_freq(int note_num)
1558 {
1559
1560         /*
1561          * This routine converts a midi note to a frequency (multiplied by 1000)
1562          */
1563
1564         int note, octave, note_freq;
1565         static int notes[] =
1566         {
1567                 261632, 277189, 293671, 311132, 329632, 349232,
1568                 369998, 391998, 415306, 440000, 466162, 493880
1569         };
1570
1571 #define BASE_OCTAVE     5
1572
1573         octave = note_num / 12;
1574         note = note_num % 12;
1575
1576         note_freq = notes[note];
1577
1578         if (octave < BASE_OCTAVE)
1579                 note_freq >>= (BASE_OCTAVE - octave);
1580         else if (octave > BASE_OCTAVE)
1581                 note_freq <<= (octave - BASE_OCTAVE);
1582
1583         /*
1584          * note_freq >>= 1;
1585          */
1586
1587         return note_freq;
1588 }
1589 EXPORT_SYMBOL(note_to_freq);
1590
1591 unsigned long compute_finetune(unsigned long base_freq, int bend, int range,
1592                  int vibrato_cents)
1593 {
1594         unsigned long amount;
1595         int negative, semitones, cents, multiplier = 1;
1596
1597         if (!bend)
1598                 return base_freq;
1599         if (!range)
1600                 return base_freq;
1601
1602         if (!base_freq)
1603                 return base_freq;
1604
1605         if (range >= 8192)
1606                 range = 8192;
1607
1608         bend = bend * range / 8192;     /* Convert to cents */
1609         bend += vibrato_cents;
1610
1611         if (!bend)
1612                 return base_freq;
1613
1614         negative = bend < 0 ? 1 : 0;
1615
1616         if (bend < 0)
1617                 bend *= -1;
1618         if (bend > range)
1619                 bend = range;
1620
1621         /*
1622            if (bend > 2399)
1623            bend = 2399;
1624          */
1625         while (bend > 2399)
1626         {
1627                 multiplier *= 4;
1628                 bend -= 2400;
1629         }
1630
1631         semitones = bend / 100;
1632         cents = bend % 100;
1633
1634         amount = (int) (semitone_tuning[semitones] * multiplier * cent_tuning[cents]) / 10000;
1635
1636         if (negative)
1637                 return (base_freq * 10000) / amount;    /* Bend down */
1638         else
1639                 return (base_freq * amount) / 10000;    /* Bend up */
1640 }
1641 EXPORT_SYMBOL(compute_finetune);
1642
1643 void sequencer_init(void)
1644 {
1645         if (sequencer_ok)
1646                 return;
1647         queue = vmalloc(SEQ_MAX_QUEUE * EV_SZ);
1648         if (queue == NULL)
1649         {
1650                 printk(KERN_ERR "sequencer: Can't allocate memory for sequencer output queue\n");
1651                 return;
1652         }
1653         iqueue = vmalloc(SEQ_MAX_QUEUE * IEV_SZ);
1654         if (iqueue == NULL)
1655         {
1656                 printk(KERN_ERR "sequencer: Can't allocate memory for sequencer input queue\n");
1657                 vfree(queue);
1658                 return;
1659         }
1660         sequencer_ok = 1;
1661 }
1662 EXPORT_SYMBOL(sequencer_init);
1663
1664 void sequencer_unload(void)
1665 {
1666         vfree(queue);
1667         vfree(iqueue);
1668         queue = iqueue = NULL;
1669 }