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opl3_synth.c
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1 /*
2  * Copyright (c) by Uros Bizjak <[email protected]>
3  *
4  * Routines for OPL2/OPL3/OPL4 control
5  *
6  * This program is free software; you can redistribute it and/or modify
7  * it under the terms of the GNU General Public License as published by
8  * the Free Software Foundation; either version 2 of the License, or
9  * (at your option) any later version.
10  *
11  * This program is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14  * GNU General Public License for more details.
15  *
16  * You should have received a copy of the GNU General Public License
17  * along with this program; if not, write to the Free Software
18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19  *
20  */
21 
22 #include <linux/slab.h>
23 #include <linux/export.h>
24 #include <sound/opl3.h>
25 #include <sound/asound_fm.h>
26 
27 #if defined(CONFIG_SND_SEQUENCER) || defined(CONFIG_SND_SEQUENCER_MODULE)
28 #define OPL3_SUPPORT_SYNTH
29 #endif
30 
31 /*
32  * There is 18 possible 2 OP voices
33  * (9 in the left and 9 in the right).
34  * The first OP is the modulator and 2nd is the carrier.
35  *
36  * The first three voices in the both sides may be connected
37  * with another voice to a 4 OP voice. For example voice 0
38  * can be connected with voice 3. The operators of voice 3 are
39  * used as operators 3 and 4 of the new 4 OP voice.
40  * In this case the 2 OP voice number 0 is the 'first half' and
41  * voice 3 is the second.
42  */
43 
44 
45 /*
46  * Register offset table for OPL2/3 voices,
47  * OPL2 / one OPL3 register array side only
48  */
49 
51 {
52 /* OP1 OP2 OP3 OP4 */
53 /* ------------------------ */
54  { 0x00, 0x03, 0x08, 0x0b },
55  { 0x01, 0x04, 0x09, 0x0c },
56  { 0x02, 0x05, 0x0a, 0x0d },
57 
58  { 0x08, 0x0b, 0x00, 0x00 },
59  { 0x09, 0x0c, 0x00, 0x00 },
60  { 0x0a, 0x0d, 0x00, 0x00 },
61 
62  { 0x10, 0x13, 0x00, 0x00 }, /* used by percussive voices */
63  { 0x11, 0x14, 0x00, 0x00 }, /* if the percussive mode */
64  { 0x12, 0x15, 0x00, 0x00 } /* is selected (only left reg block) */
65 };
66 
68 
69 /*
70  * prototypes
71  */
72 static int snd_opl3_play_note(struct snd_opl3 * opl3, struct snd_dm_fm_note * note);
73 static int snd_opl3_set_voice(struct snd_opl3 * opl3, struct snd_dm_fm_voice * voice);
74 static int snd_opl3_set_params(struct snd_opl3 * opl3, struct snd_dm_fm_params * params);
75 static int snd_opl3_set_mode(struct snd_opl3 * opl3, int mode);
76 static int snd_opl3_set_connection(struct snd_opl3 * opl3, int connection);
77 
78 /* ------------------------------ */
79 
80 /*
81  * open the device exclusively
82  */
83 int snd_opl3_open(struct snd_hwdep * hw, struct file *file)
84 {
85  return 0;
86 }
87 
88 /*
89  * ioctl for hwdep device:
90  */
91 int snd_opl3_ioctl(struct snd_hwdep * hw, struct file *file,
92  unsigned int cmd, unsigned long arg)
93 {
94  struct snd_opl3 *opl3 = hw->private_data;
95  void __user *argp = (void __user *)arg;
96 
97  if (snd_BUG_ON(!opl3))
98  return -EINVAL;
99 
100  switch (cmd) {
101  /* get information */
103  {
104  struct snd_dm_fm_info info;
105 
106  info.fm_mode = opl3->fm_mode;
107  info.rhythm = opl3->rhythm;
108  if (copy_to_user(argp, &info, sizeof(struct snd_dm_fm_info)))
109  return -EFAULT;
110  return 0;
111  }
112 
114 #ifdef CONFIG_SND_OSSEMUL
116 #endif
117  snd_opl3_reset(opl3);
118  return 0;
119 
121 #ifdef CONFIG_SND_OSSEMUL
123 #endif
124  {
125  struct snd_dm_fm_note note;
126  if (copy_from_user(&note, argp, sizeof(struct snd_dm_fm_note)))
127  return -EFAULT;
128  return snd_opl3_play_note(opl3, &note);
129  }
130 
132 #ifdef CONFIG_SND_OSSEMUL
134 #endif
135  {
136  struct snd_dm_fm_voice voice;
137  if (copy_from_user(&voice, argp, sizeof(struct snd_dm_fm_voice)))
138  return -EFAULT;
139  return snd_opl3_set_voice(opl3, &voice);
140  }
141 
143 #ifdef CONFIG_SND_OSSEMUL
145 #endif
146  {
147  struct snd_dm_fm_params params;
148  if (copy_from_user(&params, argp, sizeof(struct snd_dm_fm_params)))
149  return -EFAULT;
150  return snd_opl3_set_params(opl3, &params);
151  }
152 
154 #ifdef CONFIG_SND_OSSEMUL
156 #endif
157  return snd_opl3_set_mode(opl3, (int) arg);
158 
160 #ifdef CONFIG_SND_OSSEMUL
162 #endif
163  return snd_opl3_set_connection(opl3, (int) arg);
164 
165 #ifdef OPL3_SUPPORT_SYNTH
167  snd_opl3_clear_patches(opl3);
168  return 0;
169 #endif
170 
171 #ifdef CONFIG_SND_DEBUG
172  default:
173  snd_printk(KERN_WARNING "unknown IOCTL: 0x%x\n", cmd);
174 #endif
175  }
176  return -ENOTTY;
177 }
178 
179 /*
180  * close the device
181  */
182 int snd_opl3_release(struct snd_hwdep * hw, struct file *file)
183 {
184  struct snd_opl3 *opl3 = hw->private_data;
185 
186  snd_opl3_reset(opl3);
187  return 0;
188 }
189 
190 #ifdef OPL3_SUPPORT_SYNTH
191 /*
192  * write the device - load patches
193  */
194 long snd_opl3_write(struct snd_hwdep *hw, const char __user *buf, long count,
195  loff_t *offset)
196 {
197  struct snd_opl3 *opl3 = hw->private_data;
198  long result = 0;
199  int err = 0;
200  struct sbi_patch inst;
201 
202  while (count >= sizeof(inst)) {
203  unsigned char type;
204  if (copy_from_user(&inst, buf, sizeof(inst)))
205  return -EFAULT;
206  if (!memcmp(inst.key, FM_KEY_SBI, 4) ||
207  !memcmp(inst.key, FM_KEY_2OP, 4))
208  type = FM_PATCH_OPL2;
209  else if (!memcmp(inst.key, FM_KEY_4OP, 4))
210  type = FM_PATCH_OPL3;
211  else /* invalid type */
212  break;
213  err = snd_opl3_load_patch(opl3, inst.prog, inst.bank, type,
214  inst.name, inst.extension,
215  inst.data);
216  if (err < 0)
217  break;
218  result += sizeof(inst);
219  count -= sizeof(inst);
220  }
221  return result > 0 ? result : err;
222 }
223 
224 
225 /*
226  * Patch management
227  */
228 
229 /* offsets for SBI params */
230 #define AM_VIB 0
231 #define KSL_LEVEL 2
232 #define ATTACK_DECAY 4
233 #define SUSTAIN_RELEASE 6
234 #define WAVE_SELECT 8
235 
236 /* offset for SBI instrument */
237 #define CONNECTION 10
238 #define OFFSET_4OP 11
239 
240 /*
241  * load a patch, obviously.
242  *
243  * loaded on the given program and bank numbers with the given type
244  * (FM_PATCH_OPLx).
245  * data is the pointer of SBI record _without_ header (key and name).
246  * name is the name string of the patch.
247  * ext is the extension data of 7 bytes long (stored in name of SBI
248  * data up to offset 25), or NULL to skip.
249  * return 0 if successful or a negative error code.
250  */
251 int snd_opl3_load_patch(struct snd_opl3 *opl3,
252  int prog, int bank, int type,
253  const char *name,
254  const unsigned char *ext,
255  const unsigned char *data)
256 {
257  struct fm_patch *patch;
258  int i;
259 
260  patch = snd_opl3_find_patch(opl3, prog, bank, 1);
261  if (!patch)
262  return -ENOMEM;
263 
264  patch->type = type;
265 
266  for (i = 0; i < 2; i++) {
267  patch->inst.op[i].am_vib = data[AM_VIB + i];
268  patch->inst.op[i].ksl_level = data[KSL_LEVEL + i];
269  patch->inst.op[i].attack_decay = data[ATTACK_DECAY + i];
270  patch->inst.op[i].sustain_release = data[SUSTAIN_RELEASE + i];
271  patch->inst.op[i].wave_select = data[WAVE_SELECT + i];
272  }
273  patch->inst.feedback_connection[0] = data[CONNECTION];
274 
275  if (type == FM_PATCH_OPL3) {
276  for (i = 0; i < 2; i++) {
277  patch->inst.op[i+2].am_vib =
278  data[OFFSET_4OP + AM_VIB + i];
279  patch->inst.op[i+2].ksl_level =
280  data[OFFSET_4OP + KSL_LEVEL + i];
281  patch->inst.op[i+2].attack_decay =
282  data[OFFSET_4OP + ATTACK_DECAY + i];
283  patch->inst.op[i+2].sustain_release =
284  data[OFFSET_4OP + SUSTAIN_RELEASE + i];
285  patch->inst.op[i+2].wave_select =
286  data[OFFSET_4OP + WAVE_SELECT + i];
287  }
288  patch->inst.feedback_connection[1] =
289  data[OFFSET_4OP + CONNECTION];
290  }
291 
292  if (ext) {
293  patch->inst.echo_delay = ext[0];
294  patch->inst.echo_atten = ext[1];
295  patch->inst.chorus_spread = ext[2];
296  patch->inst.trnsps = ext[3];
297  patch->inst.fix_dur = ext[4];
298  patch->inst.modes = ext[5];
299  patch->inst.fix_key = ext[6];
300  }
301 
302  if (name)
303  strlcpy(patch->name, name, sizeof(patch->name));
304 
305  return 0;
306 }
307 EXPORT_SYMBOL(snd_opl3_load_patch);
308 
309 /*
310  * find a patch with the given program and bank numbers, returns its pointer
311  * if no matching patch is found and create_patch is set, it creates a
312  * new patch object.
313  */
314 struct fm_patch *snd_opl3_find_patch(struct snd_opl3 *opl3, int prog, int bank,
315  int create_patch)
316 {
317  /* pretty dumb hash key */
318  unsigned int key = (prog + bank) % OPL3_PATCH_HASH_SIZE;
319  struct fm_patch *patch;
320 
321  for (patch = opl3->patch_table[key]; patch; patch = patch->next) {
322  if (patch->prog == prog && patch->bank == bank)
323  return patch;
324  }
325  if (!create_patch)
326  return NULL;
327 
328  patch = kzalloc(sizeof(*patch), GFP_KERNEL);
329  if (!patch)
330  return NULL;
331  patch->prog = prog;
332  patch->bank = bank;
333  patch->next = opl3->patch_table[key];
334  opl3->patch_table[key] = patch;
335  return patch;
336 }
337 EXPORT_SYMBOL(snd_opl3_find_patch);
338 
339 /*
340  * Clear all patches of the given OPL3 instance
341  */
342 void snd_opl3_clear_patches(struct snd_opl3 *opl3)
343 {
344  int i;
345  for (i = 0; i < OPL3_PATCH_HASH_SIZE; i++) {
346  struct fm_patch *patch, *next;
347  for (patch = opl3->patch_table[i]; patch; patch = next) {
348  next = patch->next;
349  kfree(patch);
350  }
351  }
352  memset(opl3->patch_table, 0, sizeof(opl3->patch_table));
353 }
354 #endif /* OPL3_SUPPORT_SYNTH */
355 
356 /* ------------------------------ */
357 
358 void snd_opl3_reset(struct snd_opl3 * opl3)
359 {
360  unsigned short opl3_reg;
361 
362  unsigned short reg_side;
363  unsigned char voice_offset;
364 
365  int max_voices, i;
366 
367  max_voices = (opl3->hardware < OPL3_HW_OPL3) ?
369 
370  for (i = 0; i < max_voices; i++) {
371  /* Get register array side and offset of voice */
372  if (i < MAX_OPL2_VOICES) {
373  /* Left register block for voices 0 .. 8 */
374  reg_side = OPL3_LEFT;
375  voice_offset = i;
376  } else {
377  /* Right register block for voices 9 .. 17 */
378  reg_side = OPL3_RIGHT;
379  voice_offset = i - MAX_OPL2_VOICES;
380  }
381  opl3_reg = reg_side | (OPL3_REG_KSL_LEVEL + snd_opl3_regmap[voice_offset][0]);
382  opl3->command(opl3, opl3_reg, OPL3_TOTAL_LEVEL_MASK); /* Operator 1 volume */
383  opl3_reg = reg_side | (OPL3_REG_KSL_LEVEL + snd_opl3_regmap[voice_offset][1]);
384  opl3->command(opl3, opl3_reg, OPL3_TOTAL_LEVEL_MASK); /* Operator 2 volume */
385 
386  opl3_reg = reg_side | (OPL3_REG_KEYON_BLOCK + voice_offset);
387  opl3->command(opl3, opl3_reg, 0x00); /* Note off */
388  }
389 
390  opl3->max_voices = MAX_OPL2_VOICES;
392 
394  opl3->command(opl3, OPL3_LEFT | OPL3_REG_PERCUSSION, 0x00); /* Melodic mode */
395  opl3->rhythm = 0;
396 }
397 
399 
400 static int snd_opl3_play_note(struct snd_opl3 * opl3, struct snd_dm_fm_note * note)
401 {
402  unsigned short reg_side;
403  unsigned char voice_offset;
404 
405  unsigned short opl3_reg;
406  unsigned char reg_val;
407 
408  /* Voices 0 - 8 in OPL2 mode */
409  /* Voices 0 - 17 in OPL3 mode */
410  if (note->voice >= ((opl3->fm_mode == SNDRV_DM_FM_MODE_OPL3) ?
412  return -EINVAL;
413 
414  /* Get register array side and offset of voice */
415  if (note->voice < MAX_OPL2_VOICES) {
416  /* Left register block for voices 0 .. 8 */
417  reg_side = OPL3_LEFT;
418  voice_offset = note->voice;
419  } else {
420  /* Right register block for voices 9 .. 17 */
421  reg_side = OPL3_RIGHT;
422  voice_offset = note->voice - MAX_OPL2_VOICES;
423  }
424 
425  /* Set lower 8 bits of note frequency */
426  reg_val = (unsigned char) note->fnum;
427  opl3_reg = reg_side | (OPL3_REG_FNUM_LOW + voice_offset);
428  opl3->command(opl3, opl3_reg, reg_val);
429 
430  reg_val = 0x00;
431  /* Set output sound flag */
432  if (note->key_on)
433  reg_val |= OPL3_KEYON_BIT;
434  /* Set octave */
435  reg_val |= (note->octave << 2) & OPL3_BLOCKNUM_MASK;
436  /* Set higher 2 bits of note frequency */
437  reg_val |= (unsigned char) (note->fnum >> 8) & OPL3_FNUM_HIGH_MASK;
438 
439  /* Set OPL3 KEYON_BLOCK register of requested voice */
440  opl3_reg = reg_side | (OPL3_REG_KEYON_BLOCK + voice_offset);
441  opl3->command(opl3, opl3_reg, reg_val);
442 
443  return 0;
444 }
445 
446 
447 static int snd_opl3_set_voice(struct snd_opl3 * opl3, struct snd_dm_fm_voice * voice)
448 {
449  unsigned short reg_side;
450  unsigned char op_offset;
451  unsigned char voice_offset;
452 
453  unsigned short opl3_reg;
454  unsigned char reg_val;
455 
456  /* Only operators 1 and 2 */
457  if (voice->op > 1)
458  return -EINVAL;
459  /* Voices 0 - 8 in OPL2 mode */
460  /* Voices 0 - 17 in OPL3 mode */
461  if (voice->voice >= ((opl3->fm_mode == SNDRV_DM_FM_MODE_OPL3) ?
462  MAX_OPL3_VOICES : MAX_OPL2_VOICES))
463  return -EINVAL;
464 
465  /* Get register array side and offset of voice */
466  if (voice->voice < MAX_OPL2_VOICES) {
467  /* Left register block for voices 0 .. 8 */
468  reg_side = OPL3_LEFT;
469  voice_offset = voice->voice;
470  } else {
471  /* Right register block for voices 9 .. 17 */
472  reg_side = OPL3_RIGHT;
473  voice_offset = voice->voice - MAX_OPL2_VOICES;
474  }
475  /* Get register offset of operator */
476  op_offset = snd_opl3_regmap[voice_offset][voice->op];
477 
478  reg_val = 0x00;
479  /* Set amplitude modulation (tremolo) effect */
480  if (voice->am)
481  reg_val |= OPL3_TREMOLO_ON;
482  /* Set vibrato effect */
483  if (voice->vibrato)
484  reg_val |= OPL3_VIBRATO_ON;
485  /* Set sustaining sound phase */
486  if (voice->do_sustain)
487  reg_val |= OPL3_SUSTAIN_ON;
488  /* Set keyboard scaling bit */
489  if (voice->kbd_scale)
490  reg_val |= OPL3_KSR;
491  /* Set harmonic or frequency multiplier */
492  reg_val |= voice->harmonic & OPL3_MULTIPLE_MASK;
493 
494  /* Set OPL3 AM_VIB register of requested voice/operator */
495  opl3_reg = reg_side | (OPL3_REG_AM_VIB + op_offset);
496  opl3->command(opl3, opl3_reg, reg_val);
497 
498  /* Set decreasing volume of higher notes */
499  reg_val = (voice->scale_level << 6) & OPL3_KSL_MASK;
500  /* Set output volume */
501  reg_val |= ~voice->volume & OPL3_TOTAL_LEVEL_MASK;
502 
503  /* Set OPL3 KSL_LEVEL register of requested voice/operator */
504  opl3_reg = reg_side | (OPL3_REG_KSL_LEVEL + op_offset);
505  opl3->command(opl3, opl3_reg, reg_val);
506 
507  /* Set attack phase level */
508  reg_val = (voice->attack << 4) & OPL3_ATTACK_MASK;
509  /* Set decay phase level */
510  reg_val |= voice->decay & OPL3_DECAY_MASK;
511 
512  /* Set OPL3 ATTACK_DECAY register of requested voice/operator */
513  opl3_reg = reg_side | (OPL3_REG_ATTACK_DECAY + op_offset);
514  opl3->command(opl3, opl3_reg, reg_val);
515 
516  /* Set sustain phase level */
517  reg_val = (voice->sustain << 4) & OPL3_SUSTAIN_MASK;
518  /* Set release phase level */
519  reg_val |= voice->release & OPL3_RELEASE_MASK;
520 
521  /* Set OPL3 SUSTAIN_RELEASE register of requested voice/operator */
522  opl3_reg = reg_side | (OPL3_REG_SUSTAIN_RELEASE + op_offset);
523  opl3->command(opl3, opl3_reg, reg_val);
524 
525  /* Set inter-operator feedback */
526  reg_val = (voice->feedback << 1) & OPL3_FEEDBACK_MASK;
527  /* Set inter-operator connection */
528  if (voice->connection)
529  reg_val |= OPL3_CONNECTION_BIT;
530  /* OPL-3 only */
531  if (opl3->fm_mode == SNDRV_DM_FM_MODE_OPL3) {
532  if (voice->left)
533  reg_val |= OPL3_VOICE_TO_LEFT;
534  if (voice->right)
535  reg_val |= OPL3_VOICE_TO_RIGHT;
536  }
537  /* Feedback/connection bits are applicable to voice */
538  opl3_reg = reg_side | (OPL3_REG_FEEDBACK_CONNECTION + voice_offset);
539  opl3->command(opl3, opl3_reg, reg_val);
540 
541  /* Select waveform */
542  reg_val = voice->waveform & OPL3_WAVE_SELECT_MASK;
543  opl3_reg = reg_side | (OPL3_REG_WAVE_SELECT + op_offset);
544  opl3->command(opl3, opl3_reg, reg_val);
545 
546  return 0;
547 }
548 
549 static int snd_opl3_set_params(struct snd_opl3 * opl3, struct snd_dm_fm_params * params)
550 {
551  unsigned char reg_val;
552 
553  reg_val = 0x00;
554  /* Set keyboard split method */
555  if (params->kbd_split)
556  reg_val |= OPL3_KEYBOARD_SPLIT;
557  opl3->command(opl3, OPL3_LEFT | OPL3_REG_KBD_SPLIT, reg_val);
558 
559  reg_val = 0x00;
560  /* Set amplitude modulation (tremolo) depth */
561  if (params->am_depth)
562  reg_val |= OPL3_TREMOLO_DEPTH;
563  /* Set vibrato depth */
564  if (params->vib_depth)
565  reg_val |= OPL3_VIBRATO_DEPTH;
566  /* Set percussion mode */
567  if (params->rhythm) {
568  reg_val |= OPL3_PERCUSSION_ENABLE;
569  opl3->rhythm = 1;
570  } else {
571  opl3->rhythm = 0;
572  }
573  /* Play percussion instruments */
574  if (params->bass)
575  reg_val |= OPL3_BASSDRUM_ON;
576  if (params->snare)
577  reg_val |= OPL3_SNAREDRUM_ON;
578  if (params->tomtom)
579  reg_val |= OPL3_TOMTOM_ON;
580  if (params->cymbal)
581  reg_val |= OPL3_CYMBAL_ON;
582  if (params->hihat)
583  reg_val |= OPL3_HIHAT_ON;
584 
585  opl3->command(opl3, OPL3_LEFT | OPL3_REG_PERCUSSION, reg_val);
586  return 0;
587 }
588 
589 static int snd_opl3_set_mode(struct snd_opl3 * opl3, int mode)
590 {
591  if ((mode == SNDRV_DM_FM_MODE_OPL3) && (opl3->hardware < OPL3_HW_OPL3))
592  return -EINVAL;
593 
594  opl3->fm_mode = mode;
595  if (opl3->hardware >= OPL3_HW_OPL3)
596  opl3->command(opl3, OPL3_RIGHT | OPL3_REG_CONNECTION_SELECT, 0x00); /* Clear 4-op connections */
597 
598  return 0;
599 }
600 
601 static int snd_opl3_set_connection(struct snd_opl3 * opl3, int connection)
602 {
603  unsigned char reg_val;
604 
605  /* OPL-3 only */
606  if (opl3->fm_mode != SNDRV_DM_FM_MODE_OPL3)
607  return -EINVAL;
608 
609  reg_val = connection & (OPL3_RIGHT_4OP_0 | OPL3_RIGHT_4OP_1 | OPL3_RIGHT_4OP_2 |
611  /* Set 4-op connections */
612  opl3->command(opl3, OPL3_RIGHT | OPL3_REG_CONNECTION_SELECT, reg_val);
613 
614  return 0;
615 }
616