2 * synth callback routines for the emu8000 (AWE32/64)
4 * Copyright (C) 1999 Steve Ratcliffe
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.
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.
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
22 #include "emu8000_local.h"
23 #include <linux/export.h>
24 #include <sound/asoundef.h>
29 static struct snd_emux_voice *get_voice(struct snd_emux *emu,
30 struct snd_emux_port *port);
31 static int start_voice(struct snd_emux_voice *vp);
32 static void trigger_voice(struct snd_emux_voice *vp);
33 static void release_voice(struct snd_emux_voice *vp);
34 static void update_voice(struct snd_emux_voice *vp, int update);
35 static void reset_voice(struct snd_emux *emu, int ch);
36 static void terminate_voice(struct snd_emux_voice *vp);
37 static void sysex(struct snd_emux *emu, char *buf, int len, int parsed,
38 struct snd_midi_channel_set *chset);
39 #if IS_ENABLED(CONFIG_SND_SEQUENCER_OSS)
40 static int oss_ioctl(struct snd_emux *emu, int cmd, int p1, int p2);
42 static int load_fx(struct snd_emux *emu, int type, int mode,
43 const void __user *buf, long len);
45 static void set_pitch(struct snd_emu8000 *hw, struct snd_emux_voice *vp);
46 static void set_volume(struct snd_emu8000 *hw, struct snd_emux_voice *vp);
47 static void set_pan(struct snd_emu8000 *hw, struct snd_emux_voice *vp);
48 static void set_fmmod(struct snd_emu8000 *hw, struct snd_emux_voice *vp);
49 static void set_tremfreq(struct snd_emu8000 *hw, struct snd_emux_voice *vp);
50 static void set_fm2frq2(struct snd_emu8000 *hw, struct snd_emux_voice *vp);
51 static void set_filterQ(struct snd_emu8000 *hw, struct snd_emux_voice *vp);
52 static void snd_emu8000_tweak_voice(struct snd_emu8000 *emu, int ch);
55 * Ensure a value is between two points
56 * macro evaluates its args more than once, so changed to upper-case.
58 #define LIMITVALUE(x, a, b) do { if ((x) < (a)) (x) = (a); else if ((x) > (b)) (x) = (b); } while (0)
59 #define LIMITMAX(x, a) do {if ((x) > (a)) (x) = (a); } while (0)
65 static const struct snd_emux_operators emu8000_ops = {
67 .get_voice = get_voice,
68 .prepare = start_voice,
69 .trigger = trigger_voice,
70 .release = release_voice,
71 .update = update_voice,
72 .terminate = terminate_voice,
74 .sample_new = snd_emu8000_sample_new,
75 .sample_free = snd_emu8000_sample_free,
76 .sample_reset = snd_emu8000_sample_reset,
79 #if IS_ENABLED(CONFIG_SND_SEQUENCER_OSS)
80 .oss_ioctl = oss_ioctl,
85 snd_emu8000_ops_setup(struct snd_emu8000 *hw)
87 hw->emu->ops = emu8000_ops;
96 release_voice(struct snd_emux_voice *vp)
99 struct snd_emu8000 *hw;
102 dcysusv = 0x8000 | (unsigned char)vp->reg.parm.modrelease;
103 EMU8000_DCYSUS_WRITE(hw, vp->ch, dcysusv);
104 dcysusv = 0x8000 | (unsigned char)vp->reg.parm.volrelease;
105 EMU8000_DCYSUSV_WRITE(hw, vp->ch, dcysusv);
112 terminate_voice(struct snd_emux_voice *vp)
114 struct snd_emu8000 *hw;
117 EMU8000_DCYSUSV_WRITE(hw, vp->ch, 0x807F);
124 update_voice(struct snd_emux_voice *vp, int update)
126 struct snd_emu8000 *hw;
129 if (update & SNDRV_EMUX_UPDATE_VOLUME)
131 if (update & SNDRV_EMUX_UPDATE_PITCH)
133 if ((update & SNDRV_EMUX_UPDATE_PAN) &&
134 vp->port->ctrls[EMUX_MD_REALTIME_PAN])
136 if (update & SNDRV_EMUX_UPDATE_FMMOD)
138 if (update & SNDRV_EMUX_UPDATE_TREMFREQ)
139 set_tremfreq(hw, vp);
140 if (update & SNDRV_EMUX_UPDATE_FM2FRQ2)
142 if (update & SNDRV_EMUX_UPDATE_Q)
148 * Find a channel (voice) within the EMU that is not in use or at least
149 * less in use than other channels. Always returns a valid pointer
150 * no matter what. If there is a real shortage of voices then one
151 * will be cut. Such is life.
153 * The channel index (vp->ch) must be initialized in this routine.
154 * In Emu8k, it is identical with the array index.
156 static struct snd_emux_voice *
157 get_voice(struct snd_emux *emu, struct snd_emux_port *port)
160 struct snd_emux_voice *vp;
161 struct snd_emu8000 *hw;
163 /* what we are looking for, in order of preference */
165 OFF=0, RELEASED, PLAYING, END
168 /* Keeps track of what we are finding */
177 for (i = 0; i < END; i++) {
178 best[i].time = (unsigned int)(-1); /* XXX MAX_?INT really */
183 * Go through them all and get a best one to use.
185 for (i = 0; i < emu->max_voices; i++) {
188 vp = &emu->voices[i];
191 if (state == SNDRV_EMUX_ST_OFF)
193 else if (state == SNDRV_EMUX_ST_RELEASED ||
194 state == SNDRV_EMUX_ST_PENDING) {
195 bp = best + RELEASED;
196 val = (EMU8000_CVCF_READ(hw, vp->ch) >> 16) & 0xffff;
200 else if (state & SNDRV_EMUX_ST_ON)
205 /* check if sample is finished playing (non-looping only) */
206 if (state != SNDRV_EMUX_ST_OFF &&
207 (vp->reg.sample_mode & SNDRV_SFNT_SAMPLE_SINGLESHOT)) {
208 val = EMU8000_CCCA_READ(hw, vp->ch) & 0xffffff;
209 if (val >= vp->reg.loopstart)
213 if (vp->time < bp->time) {
219 for (i = 0; i < END; i++) {
220 if (best[i].voice >= 0) {
221 vp = &emu->voices[best[i].voice];
222 vp->ch = best[i].voice;
234 start_voice(struct snd_emux_voice *vp)
239 struct snd_midi_channel *chan;
240 struct snd_emu8000 *hw;
246 /* channel to be silent and idle */
247 EMU8000_DCYSUSV_WRITE(hw, ch, 0x0080);
248 EMU8000_VTFT_WRITE(hw, ch, 0x0000FFFF);
249 EMU8000_CVCF_WRITE(hw, ch, 0x0000FFFF);
250 EMU8000_PTRX_WRITE(hw, ch, 0);
251 EMU8000_CPF_WRITE(hw, ch, 0);
253 /* set pitch offset */
256 /* set envelope parameters */
257 EMU8000_ENVVAL_WRITE(hw, ch, vp->reg.parm.moddelay);
258 EMU8000_ATKHLD_WRITE(hw, ch, vp->reg.parm.modatkhld);
259 EMU8000_DCYSUS_WRITE(hw, ch, vp->reg.parm.moddcysus);
260 EMU8000_ENVVOL_WRITE(hw, ch, vp->reg.parm.voldelay);
261 EMU8000_ATKHLDV_WRITE(hw, ch, vp->reg.parm.volatkhld);
262 /* decay/sustain parameter for volume envelope is used
263 for triggerg the voice */
265 /* cutoff and volume */
268 /* modulation envelope heights */
269 EMU8000_PEFE_WRITE(hw, ch, vp->reg.parm.pefe);
272 EMU8000_LFO1VAL_WRITE(hw, ch, vp->reg.parm.lfo1delay);
273 EMU8000_LFO2VAL_WRITE(hw, ch, vp->reg.parm.lfo2delay);
275 /* lfo1 pitch & cutoff shift */
277 /* lfo1 volume & freq */
278 set_tremfreq(hw, vp);
279 /* lfo2 pitch & freq */
281 /* pan & loop start */
284 /* chorus & loop end (chorus 8bit, MSB) */
285 addr = vp->reg.loopend - 1;
286 temp = vp->reg.parm.chorus;
287 temp += (int)chan->control[MIDI_CTL_E3_CHORUS_DEPTH] * 9 / 10;
289 temp = (temp <<24) | (unsigned int)addr;
290 EMU8000_CSL_WRITE(hw, ch, temp);
292 /* Q & current address (Q 4bit value, MSB) */
293 addr = vp->reg.start - 1;
294 temp = vp->reg.parm.filterQ;
295 temp = (temp<<28) | (unsigned int)addr;
296 EMU8000_CCCA_WRITE(hw, ch, temp);
298 /* clear unknown registers */
299 EMU8000_00A0_WRITE(hw, ch, 0);
300 EMU8000_0080_WRITE(hw, ch, 0);
303 temp = vp->vtarget << 16;
304 EMU8000_VTFT_WRITE(hw, ch, temp | vp->ftarget);
305 EMU8000_CVCF_WRITE(hw, ch, temp | 0xff00);
314 trigger_voice(struct snd_emux_voice *vp)
318 struct snd_emu8000 *hw;
322 /* set reverb and pitch target */
323 temp = vp->reg.parm.reverb;
324 temp += (int)vp->chan->control[MIDI_CTL_E1_REVERB_DEPTH] * 9 / 10;
326 temp = (temp << 8) | (vp->ptarget << 16) | vp->aaux;
327 EMU8000_PTRX_WRITE(hw, ch, temp);
328 EMU8000_CPF_WRITE(hw, ch, vp->ptarget << 16);
329 EMU8000_DCYSUSV_WRITE(hw, ch, vp->reg.parm.voldcysus);
333 * reset voice parameters
336 reset_voice(struct snd_emux *emu, int ch)
338 struct snd_emu8000 *hw;
341 EMU8000_DCYSUSV_WRITE(hw, ch, 0x807F);
342 snd_emu8000_tweak_voice(hw, ch);
346 * Set the pitch of a possibly playing note.
349 set_pitch(struct snd_emu8000 *hw, struct snd_emux_voice *vp)
351 EMU8000_IP_WRITE(hw, vp->ch, vp->apitch);
355 * Set the volume of a possibly already playing note
358 set_volume(struct snd_emu8000 *hw, struct snd_emux_voice *vp)
362 ifatn = (unsigned char)vp->acutoff;
363 ifatn = (ifatn << 8);
364 ifatn |= (unsigned char)vp->avol;
365 EMU8000_IFATN_WRITE(hw, vp->ch, ifatn);
369 * Set pan and loop start address.
372 set_pan(struct snd_emu8000 *hw, struct snd_emux_voice *vp)
376 temp = ((unsigned int)vp->apan<<24) | ((unsigned int)vp->reg.loopstart - 1);
377 EMU8000_PSST_WRITE(hw, vp->ch, temp);
383 set_fmmod(struct snd_emu8000 *hw, struct snd_emux_voice *vp)
385 unsigned short fmmod;
387 unsigned char cutoff;
390 pitch = (char)(vp->reg.parm.fmmod>>8);
391 cutoff = (vp->reg.parm.fmmod & 0xff);
392 modulation = vp->chan->gm_modulation + vp->chan->midi_pressure;
393 pitch += (MOD_SENSE * modulation) / 1200;
394 LIMITVALUE(pitch, -128, 127);
395 fmmod = ((unsigned char)pitch<<8) | cutoff;
396 EMU8000_FMMOD_WRITE(hw, vp->ch, fmmod);
399 /* set tremolo (lfo1) volume & frequency */
401 set_tremfreq(struct snd_emu8000 *hw, struct snd_emux_voice *vp)
403 EMU8000_TREMFRQ_WRITE(hw, vp->ch, vp->reg.parm.tremfrq);
406 /* set lfo2 pitch & frequency */
408 set_fm2frq2(struct snd_emu8000 *hw, struct snd_emux_voice *vp)
410 unsigned short fm2frq2;
415 pitch = (char)(vp->reg.parm.fm2frq2>>8);
416 freq = vp->reg.parm.fm2frq2 & 0xff;
417 modulation = vp->chan->gm_modulation + vp->chan->midi_pressure;
418 pitch += (MOD_SENSE * modulation) / 1200;
419 LIMITVALUE(pitch, -128, 127);
420 fm2frq2 = ((unsigned char)pitch<<8) | freq;
421 EMU8000_FM2FRQ2_WRITE(hw, vp->ch, fm2frq2);
426 set_filterQ(struct snd_emu8000 *hw, struct snd_emux_voice *vp)
429 addr = EMU8000_CCCA_READ(hw, vp->ch) & 0xffffff;
430 addr |= (vp->reg.parm.filterQ << 28);
431 EMU8000_CCCA_WRITE(hw, vp->ch, addr);
435 * set the envelope & LFO parameters to the default values
438 snd_emu8000_tweak_voice(struct snd_emu8000 *emu, int i)
440 /* set all mod/vol envelope shape to minimum */
441 EMU8000_ENVVOL_WRITE(emu, i, 0x8000);
442 EMU8000_ENVVAL_WRITE(emu, i, 0x8000);
443 EMU8000_DCYSUS_WRITE(emu, i, 0x7F7F);
444 EMU8000_ATKHLDV_WRITE(emu, i, 0x7F7F);
445 EMU8000_ATKHLD_WRITE(emu, i, 0x7F7F);
446 EMU8000_PEFE_WRITE(emu, i, 0); /* mod envelope height to zero */
447 EMU8000_LFO1VAL_WRITE(emu, i, 0x8000); /* no delay for LFO1 */
448 EMU8000_LFO2VAL_WRITE(emu, i, 0x8000);
449 EMU8000_IP_WRITE(emu, i, 0xE000); /* no pitch shift */
450 EMU8000_IFATN_WRITE(emu, i, 0xFF00); /* volume to minimum */
451 EMU8000_FMMOD_WRITE(emu, i, 0);
452 EMU8000_TREMFRQ_WRITE(emu, i, 0);
453 EMU8000_FM2FRQ2_WRITE(emu, i, 0);
460 sysex(struct snd_emux *emu, char *buf, int len, int parsed, struct snd_midi_channel_set *chset)
462 struct snd_emu8000 *hw;
467 case SNDRV_MIDI_SYSEX_GS_CHORUS_MODE:
468 hw->chorus_mode = chset->gs_chorus_mode;
469 snd_emu8000_update_chorus_mode(hw);
472 case SNDRV_MIDI_SYSEX_GS_REVERB_MODE:
473 hw->reverb_mode = chset->gs_reverb_mode;
474 snd_emu8000_update_reverb_mode(hw);
480 #if IS_ENABLED(CONFIG_SND_SEQUENCER_OSS)
485 oss_ioctl(struct snd_emux *emu, int cmd, int p1, int p2)
487 struct snd_emu8000 *hw;
492 case _EMUX_OSS_REVERB_MODE:
493 hw->reverb_mode = p1;
494 snd_emu8000_update_reverb_mode(hw);
497 case _EMUX_OSS_CHORUS_MODE:
498 hw->chorus_mode = p1;
499 snd_emu8000_update_chorus_mode(hw);
502 case _EMUX_OSS_INITIALIZE_CHIP:
503 /* snd_emu8000_init(hw); */ /*ignored*/
506 case _EMUX_OSS_EQUALIZER:
508 hw->treble_level = p2;
509 snd_emu8000_update_equalizer(hw);
518 * additional patch keys
521 #define SNDRV_EMU8000_LOAD_CHORUS_FX 0x10 /* optarg=mode */
522 #define SNDRV_EMU8000_LOAD_REVERB_FX 0x11 /* optarg=mode */
530 load_fx(struct snd_emux *emu, int type, int mode, const void __user *buf, long len)
532 struct snd_emu8000 *hw;
540 case SNDRV_EMU8000_LOAD_CHORUS_FX:
541 return snd_emu8000_load_chorus_fx(hw, mode, buf, len);
542 case SNDRV_EMU8000_LOAD_REVERB_FX:
543 return snd_emu8000_load_reverb_fx(hw, mode, buf, len);