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Committer: Michael Beasley <mike@snafu.setup>
[mikesnafu-overlay.git] / sound / isa / sb / emu8000_callback.c
blob9a3c71cc2e07c69e832d04583ef1394a715a7a04
1 /*
2 * synth callback routines for the emu8000 (AWE32/64)
3 *
4 * Copyright (C) 1999 Steve Ratcliffe
5 * Copyright (C) 1999-2000 Takashi Iwai <tiwai@suse.de>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 */
21
22 #include "emu8000_local.h"
23 #include <sound/asoundef.h>
24
25 /*
26 * prototypes
27 */
28 static struct snd_emux_voice *get_voice(struct snd_emux *emu,
29 struct snd_emux_port *port);
30 static int start_voice(struct snd_emux_voice *vp);
31 static void trigger_voice(struct snd_emux_voice *vp);
32 static void release_voice(struct snd_emux_voice *vp);
33 static void update_voice(struct snd_emux_voice *vp, int update);
34 static void reset_voice(struct snd_emux *emu, int ch);
35 static void terminate_voice(struct snd_emux_voice *vp);
36 static void sysex(struct snd_emux *emu, char *buf, int len, int parsed,
37 struct snd_midi_channel_set *chset);
38 #ifdef CONFIG_SND_SEQUENCER_OSS
39 static int oss_ioctl(struct snd_emux *emu, int cmd, int p1, int p2);
40 #endif
41 static int load_fx(struct snd_emux *emu, int type, int mode,
42 const void __user *buf, long len);
43
44 static void set_pitch(struct snd_emu8000 *hw, struct snd_emux_voice *vp);
45 static void set_volume(struct snd_emu8000 *hw, struct snd_emux_voice *vp);
46 static void set_pan(struct snd_emu8000 *hw, struct snd_emux_voice *vp);
47 static void set_fmmod(struct snd_emu8000 *hw, struct snd_emux_voice *vp);
48 static void set_tremfreq(struct snd_emu8000 *hw, struct snd_emux_voice *vp);
49 static void set_fm2frq2(struct snd_emu8000 *hw, struct snd_emux_voice *vp);
50 static void set_filterQ(struct snd_emu8000 *hw, struct snd_emux_voice *vp);
51 static void snd_emu8000_tweak_voice(struct snd_emu8000 *emu, int ch);
52
53 /*
54 * Ensure a value is between two points
55 * macro evaluates its args more than once, so changed to upper-case.
56 */
57 #define LIMITVALUE(x, a, b) do { if ((x) < (a)) (x) = (a); else if ((x) > (b)) (x) = (b); } while (0)
58 #define LIMITMAX(x, a) do {if ((x) > (a)) (x) = (a); } while (0)
59
60
61 /*
62 * set up operators
63 */
64 static struct snd_emux_operators emu8000_ops = {
65 .owner = THIS_MODULE,
66 .get_voice = get_voice,
67 .prepare = start_voice,
68 .trigger = trigger_voice,
69 .release = release_voice,
70 .update = update_voice,
71 .terminate = terminate_voice,
72 .reset = reset_voice,
73 .sample_new = snd_emu8000_sample_new,
74 .sample_free = snd_emu8000_sample_free,
75 .sample_reset = snd_emu8000_sample_reset,
76 .load_fx = load_fx,
77 .sysex = sysex,
78 #ifdef CONFIG_SND_SEQUENCER_OSS
79 .oss_ioctl = oss_ioctl,
80 #endif
81 };
82
83 void
84 snd_emu8000_ops_setup(struct snd_emu8000 *hw)
85 {
86 hw->emu->ops = emu8000_ops;
87 }
88
89
90
91 /*
92 * Terminate a voice
93 */
94 static void
95 release_voice(struct snd_emux_voice *vp)
96 {
97 int dcysusv;
98 struct snd_emu8000 *hw;
99
100 hw = vp->hw;
101 dcysusv = 0x8000 | (unsigned char)vp->reg.parm.modrelease;
102 EMU8000_DCYSUS_WRITE(hw, vp->ch, dcysusv);
103 dcysusv = 0x8000 | (unsigned char)vp->reg.parm.volrelease;
104 EMU8000_DCYSUSV_WRITE(hw, vp->ch, dcysusv);
105 }
106
107
108 /*
109 */
110 static void
111 terminate_voice(struct snd_emux_voice *vp)
112 {
113 struct snd_emu8000 *hw;
114
115 hw = vp->hw;
116 EMU8000_DCYSUSV_WRITE(hw, vp->ch, 0x807F);
117 }
118
119
120 /*
121 */
122 static void
123 update_voice(struct snd_emux_voice *vp, int update)
124 {
125 struct snd_emu8000 *hw;
126
127 hw = vp->hw;
128 if (update & SNDRV_EMUX_UPDATE_VOLUME)
129 set_volume(hw, vp);
130 if (update & SNDRV_EMUX_UPDATE_PITCH)
131 set_pitch(hw, vp);
132 if ((update & SNDRV_EMUX_UPDATE_PAN) &&
133 vp->port->ctrls[EMUX_MD_REALTIME_PAN])
134 set_pan(hw, vp);
135 if (update & SNDRV_EMUX_UPDATE_FMMOD)
136 set_fmmod(hw, vp);
137 if (update & SNDRV_EMUX_UPDATE_TREMFREQ)
138 set_tremfreq(hw, vp);
139 if (update & SNDRV_EMUX_UPDATE_FM2FRQ2)
140 set_fm2frq2(hw, vp);
141 if (update & SNDRV_EMUX_UPDATE_Q)
142 set_filterQ(hw, vp);
143 }
144
145
146 /*
147 * Find a channel (voice) within the EMU that is not in use or at least
148 * less in use than other channels. Always returns a valid pointer
149 * no matter what. If there is a real shortage of voices then one
150 * will be cut. Such is life.
151 *
152 * The channel index (vp->ch) must be initialized in this routine.
153 * In Emu8k, it is identical with the array index.
154 */
155 static struct snd_emux_voice *
156 get_voice(struct snd_emux *emu, struct snd_emux_port *port)
157 {
158 int i;
159 struct snd_emux_voice *vp;
160 struct snd_emu8000 *hw;
161
162 /* what we are looking for, in order of preference */
163 enum {
164 OFF=0, RELEASED, PLAYING, END
165 };
166
167 /* Keeps track of what we are finding */
168 struct best {
169 unsigned int time;
170 int voice;
171 } best[END];
172 struct best *bp;
173
174 hw = emu->hw;
175
176 for (i = 0; i < END; i++) {
177 best[i].time = (unsigned int)(-1); /* XXX MAX_?INT really */;
178 best[i].voice = -1;
179 }
180
181 /*
182 * Go through them all and get a best one to use.
183 */
184 for (i = 0; i < emu->max_voices; i++) {
185 int state, val;
186
187 vp = &emu->voices[i];
188 state = vp->state;
189
190 if (state == SNDRV_EMUX_ST_OFF)
191 bp = best + OFF;
192 else if (state == SNDRV_EMUX_ST_RELEASED ||
193 state == SNDRV_EMUX_ST_PENDING) {
194 bp = best + RELEASED;
195 val = (EMU8000_CVCF_READ(hw, vp->ch) >> 16) & 0xffff;
196 if (! val)
197 bp = best + OFF;
198 }
199 else if (state & SNDRV_EMUX_ST_ON)
200 bp = best + PLAYING;
201 else
202 continue;
203
204 /* check if sample is finished playing (non-looping only) */
205 if (state != SNDRV_EMUX_ST_OFF &&
206 (vp->reg.sample_mode & SNDRV_SFNT_SAMPLE_SINGLESHOT)) {
207 val = EMU8000_CCCA_READ(hw, vp->ch) & 0xffffff;
208 if (val >= vp->reg.loopstart)
209 bp = best + OFF;
210 }
211
212 if (vp->time < bp->time) {
213 bp->time = vp->time;
214 bp->voice = i;
215 }
216 }
217
218 for (i = 0; i < END; i++) {
219 if (best[i].voice >= 0) {
220 vp = &emu->voices[best[i].voice];
221 vp->ch = best[i].voice;
222 return vp;
223 }
224 }
225
226 /* not found */
227 return NULL;
228 }
229
230 /*
231 */
232 static int
233 start_voice(struct snd_emux_voice *vp)
234 {
235 unsigned int temp;
236 int ch;
237 int addr;
238 struct snd_midi_channel *chan;
239 struct snd_emu8000 *hw;
240
241 hw = vp->hw;
242 ch = vp->ch;
243 chan = vp->chan;
244
245 /* channel to be silent and idle */
246 EMU8000_DCYSUSV_WRITE(hw, ch, 0x0080);
247 EMU8000_VTFT_WRITE(hw, ch, 0x0000FFFF);
248 EMU8000_CVCF_WRITE(hw, ch, 0x0000FFFF);
249 EMU8000_PTRX_WRITE(hw, ch, 0);
250 EMU8000_CPF_WRITE(hw, ch, 0);
251
252 /* set pitch offset */
253 set_pitch(hw, vp);
254
255 /* set envelope parameters */
256 EMU8000_ENVVAL_WRITE(hw, ch, vp->reg.parm.moddelay);
257 EMU8000_ATKHLD_WRITE(hw, ch, vp->reg.parm.modatkhld);
258 EMU8000_DCYSUS_WRITE(hw, ch, vp->reg.parm.moddcysus);
259 EMU8000_ENVVOL_WRITE(hw, ch, vp->reg.parm.voldelay);
260 EMU8000_ATKHLDV_WRITE(hw, ch, vp->reg.parm.volatkhld);
261 /* decay/sustain parameter for volume envelope is used
262 for triggerg the voice */
263
264 /* cutoff and volume */
265 set_volume(hw, vp);
266
267 /* modulation envelope heights */
268 EMU8000_PEFE_WRITE(hw, ch, vp->reg.parm.pefe);
269
270 /* lfo1/2 delay */
271 EMU8000_LFO1VAL_WRITE(hw, ch, vp->reg.parm.lfo1delay);
272 EMU8000_LFO2VAL_WRITE(hw, ch, vp->reg.parm.lfo2delay);
273
274 /* lfo1 pitch & cutoff shift */
275 set_fmmod(hw, vp);
276 /* lfo1 volume & freq */
277 set_tremfreq(hw, vp);
278 /* lfo2 pitch & freq */
279 set_fm2frq2(hw, vp);
280 /* pan & loop start */
281 set_pan(hw, vp);
282
283 /* chorus & loop end (chorus 8bit, MSB) */
284 addr = vp->reg.loopend - 1;
285 temp = vp->reg.parm.chorus;
286 temp += (int)chan->control[MIDI_CTL_E3_CHORUS_DEPTH] * 9 / 10;
287 LIMITMAX(temp, 255);
288 temp = (temp <<24) | (unsigned int)addr;
289 EMU8000_CSL_WRITE(hw, ch, temp);
290
291 /* Q & current address (Q 4bit value, MSB) */
292 addr = vp->reg.start - 1;
293 temp = vp->reg.parm.filterQ;
294 temp = (temp<<28) | (unsigned int)addr;
295 EMU8000_CCCA_WRITE(hw, ch, temp);
296
297 /* clear unknown registers */
298 EMU8000_00A0_WRITE(hw, ch, 0);
299 EMU8000_0080_WRITE(hw, ch, 0);
300
301 /* reset volume */
302 temp = vp->vtarget << 16;
303 EMU8000_VTFT_WRITE(hw, ch, temp | vp->ftarget);
304 EMU8000_CVCF_WRITE(hw, ch, temp | 0xff00);
305
306 return 0;
307 }
308
309 /*
310 * Start envelope
311 */
312 static void
313 trigger_voice(struct snd_emux_voice *vp)
314 {
315 int ch = vp->ch;
316 unsigned int temp;
317 struct snd_emu8000 *hw;
318
319 hw = vp->hw;
320
321 /* set reverb and pitch target */
322 temp = vp->reg.parm.reverb;
323 temp += (int)vp->chan->control[MIDI_CTL_E1_REVERB_DEPTH] * 9 / 10;
324 LIMITMAX(temp, 255);
325 temp = (temp << 8) | (vp->ptarget << 16) | vp->aaux;
326 EMU8000_PTRX_WRITE(hw, ch, temp);
327 EMU8000_CPF_WRITE(hw, ch, vp->ptarget << 16);
328 EMU8000_DCYSUSV_WRITE(hw, ch, vp->reg.parm.voldcysus);
329 }
330
331 /*
332 * reset voice parameters
333 */
334 static void
335 reset_voice(struct snd_emux *emu, int ch)
336 {
337 struct snd_emu8000 *hw;
338
339 hw = emu->hw;
340 EMU8000_DCYSUSV_WRITE(hw, ch, 0x807F);
341 snd_emu8000_tweak_voice(hw, ch);
342 }
343
344 /*
345 * Set the pitch of a possibly playing note.
346 */
347 static void
348 set_pitch(struct snd_emu8000 *hw, struct snd_emux_voice *vp)
349 {
350 EMU8000_IP_WRITE(hw, vp->ch, vp->apitch);
351 }
352
353 /*
354 * Set the volume of a possibly already playing note
355 */
356 static void
357 set_volume(struct snd_emu8000 *hw, struct snd_emux_voice *vp)
358 {
359 int ifatn;
360
361 ifatn = (unsigned char)vp->acutoff;
362 ifatn = (ifatn << 8);
363 ifatn |= (unsigned char)vp->avol;
364 EMU8000_IFATN_WRITE(hw, vp->ch, ifatn);
365 }
366
367 /*
368 * Set pan and loop start address.
369 */
370 static void
371 set_pan(struct snd_emu8000 *hw, struct snd_emux_voice *vp)
372 {
373 unsigned int temp;
374
375 temp = ((unsigned int)vp->apan<<24) | ((unsigned int)vp->reg.loopstart - 1);
376 EMU8000_PSST_WRITE(hw, vp->ch, temp);
377 }
378
379 #define MOD_SENSE 18
380
381 static void
382 set_fmmod(struct snd_emu8000 *hw, struct snd_emux_voice *vp)
383 {
384 unsigned short fmmod;
385 short pitch;
386 unsigned char cutoff;
387 int modulation;
388
389 pitch = (char)(vp->reg.parm.fmmod>>8);
390 cutoff = (vp->reg.parm.fmmod & 0xff);
391 modulation = vp->chan->gm_modulation + vp->chan->midi_pressure;
392 pitch += (MOD_SENSE * modulation) / 1200;
393 LIMITVALUE(pitch, -128, 127);
394 fmmod = ((unsigned char)pitch<<8) | cutoff;
395 EMU8000_FMMOD_WRITE(hw, vp->ch, fmmod);
396 }
397
398 /* set tremolo (lfo1) volume & frequency */
399 static void
400 set_tremfreq(struct snd_emu8000 *hw, struct snd_emux_voice *vp)
401 {
402 EMU8000_TREMFRQ_WRITE(hw, vp->ch, vp->reg.parm.tremfrq);
403 }
404
405 /* set lfo2 pitch & frequency */
406 static void
407 set_fm2frq2(struct snd_emu8000 *hw, struct snd_emux_voice *vp)
408 {
409 unsigned short fm2frq2;
410 short pitch;
411 unsigned char freq;
412 int modulation;
413
414 pitch = (char)(vp->reg.parm.fm2frq2>>8);
415 freq = vp->reg.parm.fm2frq2 & 0xff;
416 modulation = vp->chan->gm_modulation + vp->chan->midi_pressure;
417 pitch += (MOD_SENSE * modulation) / 1200;
418 LIMITVALUE(pitch, -128, 127);
419 fm2frq2 = ((unsigned char)pitch<<8) | freq;
420 EMU8000_FM2FRQ2_WRITE(hw, vp->ch, fm2frq2);
421 }
422
423 /* set filterQ */
424 static void
425 set_filterQ(struct snd_emu8000 *hw, struct snd_emux_voice *vp)
426 {
427 unsigned int addr;
428 addr = EMU8000_CCCA_READ(hw, vp->ch) & 0xffffff;
429 addr |= (vp->reg.parm.filterQ << 28);
430 EMU8000_CCCA_WRITE(hw, vp->ch, addr);
431 }
432
433 /*
434 * set the envelope & LFO parameters to the default values
435 */
436 static void
437 snd_emu8000_tweak_voice(struct snd_emu8000 *emu, int i)
438 {
439 /* set all mod/vol envelope shape to minimum */
440 EMU8000_ENVVOL_WRITE(emu, i, 0x8000);
441 EMU8000_ENVVAL_WRITE(emu, i, 0x8000);
442 EMU8000_DCYSUS_WRITE(emu, i, 0x7F7F);
443 EMU8000_ATKHLDV_WRITE(emu, i, 0x7F7F);
444 EMU8000_ATKHLD_WRITE(emu, i, 0x7F7F);
445 EMU8000_PEFE_WRITE(emu, i, 0); /* mod envelope height to zero */
446 EMU8000_LFO1VAL_WRITE(emu, i, 0x8000); /* no delay for LFO1 */
447 EMU8000_LFO2VAL_WRITE(emu, i, 0x8000);
448 EMU8000_IP_WRITE(emu, i, 0xE000); /* no pitch shift */
449 EMU8000_IFATN_WRITE(emu, i, 0xFF00); /* volume to minimum */
450 EMU8000_FMMOD_WRITE(emu, i, 0);
451 EMU8000_TREMFRQ_WRITE(emu, i, 0);
452 EMU8000_FM2FRQ2_WRITE(emu, i, 0);
453 }
454
455 /*
456 * sysex callback
457 */
458 static void
459 sysex(struct snd_emux *emu, char *buf, int len, int parsed, struct snd_midi_channel_set *chset)
460 {
461 struct snd_emu8000 *hw;
462
463 hw = emu->hw;
464
465 switch (parsed) {
466 case SNDRV_MIDI_SYSEX_GS_CHORUS_MODE:
467 hw->chorus_mode = chset->gs_chorus_mode;
468 snd_emu8000_update_chorus_mode(hw);
469 break;
470
471 case SNDRV_MIDI_SYSEX_GS_REVERB_MODE:
472 hw->reverb_mode = chset->gs_reverb_mode;
473 snd_emu8000_update_reverb_mode(hw);
474 break;
475 }
476 }
477
478
479 #ifdef CONFIG_SND_SEQUENCER_OSS
480 /*
481 * OSS ioctl callback
482 */
483 static int
484 oss_ioctl(struct snd_emux *emu, int cmd, int p1, int p2)
485 {
486 struct snd_emu8000 *hw;
487
488 hw = emu->hw;
489
490 switch (cmd) {
491 case _EMUX_OSS_REVERB_MODE:
492 hw->reverb_mode = p1;
493 snd_emu8000_update_reverb_mode(hw);
494 break;
495
496 case _EMUX_OSS_CHORUS_MODE:
497 hw->chorus_mode = p1;
498 snd_emu8000_update_chorus_mode(hw);
499 break;
500
501 case _EMUX_OSS_INITIALIZE_CHIP:
502 /* snd_emu8000_init(hw); */ /*ignored*/
503 break;
504
505 case _EMUX_OSS_EQUALIZER:
506 hw->bass_level = p1;
507 hw->treble_level = p2;
508 snd_emu8000_update_equalizer(hw);
509 break;
510 }
511 return 0;
512 }
513 #endif
514
515
516 /*
517 * additional patch keys
518 */
519
520 #define SNDRV_EMU8000_LOAD_CHORUS_FX 0x10 /* optarg=mode */
521 #define SNDRV_EMU8000_LOAD_REVERB_FX 0x11 /* optarg=mode */
522
523
524 /*
525 * callback routine
526 */
527
528 static int
529 load_fx(struct snd_emux *emu, int type, int mode, const void __user *buf, long len)
530 {
531 struct snd_emu8000 *hw;
532 hw = emu->hw;
533
534 /* skip header */
535 buf += 16;
536 len -= 16;
537
538 switch (type) {
539 case SNDRV_EMU8000_LOAD_CHORUS_FX:
540 return snd_emu8000_load_chorus_fx(hw, mode, buf, len);
541 case SNDRV_EMU8000_LOAD_REVERB_FX:
542 return snd_emu8000_load_reverb_fx(hw, mode, buf, len);
543 }
544 return -EINVAL;
545 }
546
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