~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

TOMOYO Linux Cross Reference
Linux/sound/drivers/opl3/opl3_synth.c

Version: ~ [ linux-5.6 ] ~ [ linux-5.5.13 ] ~ [ linux-5.4.28 ] ~ [ linux-5.3.18 ] ~ [ linux-5.2.21 ] ~ [ linux-5.1.21 ] ~ [ linux-5.0.21 ] ~ [ linux-4.20.17 ] ~ [ linux-4.19.113 ] ~ [ linux-4.18.20 ] ~ [ linux-4.17.19 ] ~ [ linux-4.16.18 ] ~ [ linux-4.15.18 ] ~ [ linux-4.14.174 ] ~ [ linux-4.13.16 ] ~ [ linux-4.12.14 ] ~ [ linux-4.11.12 ] ~ [ linux-4.10.17 ] ~ [ linux-4.9.217 ] ~ [ linux-4.8.17 ] ~ [ linux-4.7.10 ] ~ [ linux-4.6.7 ] ~ [ linux-4.5.7 ] ~ [ linux-4.4.217 ] ~ [ linux-4.3.6 ] ~ [ linux-4.2.8 ] ~ [ linux-4.1.52 ] ~ [ linux-4.0.9 ] ~ [ linux-3.19.8 ] ~ [ linux-3.18.140 ] ~ [ linux-3.17.8 ] ~ [ linux-3.16.82 ] ~ [ linux-3.15.10 ] ~ [ linux-3.14.79 ] ~ [ linux-3.13.11 ] ~ [ linux-3.12.74 ] ~ [ linux-3.11.10 ] ~ [ linux-3.10.108 ] ~ [ linux-3.9.11 ] ~ [ linux-3.8.13 ] ~ [ linux-3.7.10 ] ~ [ linux-3.6.11 ] ~ [ linux-3.5.7 ] ~ [ linux-3.4.113 ] ~ [ linux-3.3.8 ] ~ [ linux-3.2.102 ] ~ [ linux-3.1.10 ] ~ [ linux-3.0.101 ] ~ [ linux-2.6.32.71 ] ~ [ linux-2.6.0 ] ~ [ linux-2.4.37.11 ] ~ [ unix-v6-master ] ~ [ ccs-tools-1.8.5 ] ~ [ policy-sample ] ~
Architecture: ~ [ i386 ] ~ [ alpha ] ~ [ m68k ] ~ [ mips ] ~ [ ppc ] ~ [ sparc ] ~ [ sparc64 ] ~

  1 /*
  2  *  Copyright (c) by Uros Bizjak <uros@kss-loka.si>
  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 IS_ENABLED(CONFIG_SND_SEQUENCER)
 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 
 50 char snd_opl3_regmap[MAX_OPL2_VOICES][4] =
 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 
 67 EXPORT_SYMBOL(snd_opl3_regmap);
 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 */
102         case SNDRV_DM_FM_IOCTL_INFO:
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 
113         case SNDRV_DM_FM_IOCTL_RESET:
114 #ifdef CONFIG_SND_OSSEMUL
115         case SNDRV_DM_FM_OSS_IOCTL_RESET:
116 #endif
117                 snd_opl3_reset(opl3);
118                 return 0;
119 
120         case SNDRV_DM_FM_IOCTL_PLAY_NOTE:
121 #ifdef CONFIG_SND_OSSEMUL
122         case SNDRV_DM_FM_OSS_IOCTL_PLAY_NOTE:
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 
131         case SNDRV_DM_FM_IOCTL_SET_VOICE:
132 #ifdef CONFIG_SND_OSSEMUL
133         case SNDRV_DM_FM_OSS_IOCTL_SET_VOICE:
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 
142         case SNDRV_DM_FM_IOCTL_SET_PARAMS:
143 #ifdef CONFIG_SND_OSSEMUL
144         case SNDRV_DM_FM_OSS_IOCTL_SET_PARAMS:
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 
153         case SNDRV_DM_FM_IOCTL_SET_MODE:
154 #ifdef CONFIG_SND_OSSEMUL
155         case SNDRV_DM_FM_OSS_IOCTL_SET_MODE:
156 #endif
157                 return snd_opl3_set_mode(opl3, (int) arg);
158 
159         case SNDRV_DM_FM_IOCTL_SET_CONNECTION:
160 #ifdef CONFIG_SND_OSSEMUL
161         case SNDRV_DM_FM_OSS_IOCTL_SET_OPL:
162 #endif
163                 return snd_opl3_set_connection(opl3, (int) arg);
164 
165 #ifdef OPL3_SUPPORT_SYNTH
166         case SNDRV_DM_FM_IOCTL_CLEAR_PATCHES:
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) ?
368                 MAX_OPL2_VOICES : MAX_OPL3_VOICES;
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;
391         opl3->fm_mode = SNDRV_DM_FM_MODE_OPL2;
392 
393         opl3->command(opl3, OPL3_LEFT | OPL3_REG_TEST, OPL3_ENABLE_WAVE_SELECT);
394         opl3->command(opl3, OPL3_LEFT | OPL3_REG_PERCUSSION, 0x00);     /* Melodic mode */
395         opl3->rhythm = 0;
396 }
397 
398 EXPORT_SYMBOL(snd_opl3_reset);
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) ?
411                             MAX_OPL3_VOICES : MAX_OPL2_VOICES))
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 |
610                                 OPL3_LEFT_4OP_0 | OPL3_LEFT_4OP_1 | OPL3_LEFT_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 
617 

~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

kernel.org | git.kernel.org | LWN.net | Project Home | Wiki (Japanese) | Wiki (English) | SVN repository | Mail admin

Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.

osdn.jp