Commit | Line | Data |
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1a59d1b8 | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
1da177e4 LT |
2 | /* |
3 | * Copyright (c) by Uros Bizjak <uros@kss-loka.si> | |
4 | * | |
5 | * Midi synth routines for OPL2/OPL3/OPL4 FM | |
1da177e4 LT |
6 | */ |
7 | ||
8 | #undef DEBUG_ALLOC | |
9 | #undef DEBUG_MIDI | |
10 | ||
11 | #include "opl3_voice.h" | |
12 | #include <sound/asoundef.h> | |
13 | ||
a2fa882d TI |
14 | #ifdef DEBUG_MIDI |
15 | #define opl3_dbg(opl3, fmt, ...) \ | |
16 | dev_dbg(((struct snd_opl3 *)(opl3))->card->dev, fmt, ##__VA_ARGS__) | |
17 | #else | |
18 | #define opl3_dbg(opl3, fmt, ...) do {} while (0) | |
19 | #endif | |
20 | ||
8dce39b8 KH |
21 | static void snd_opl3_note_off_unsafe(void *p, int note, int vel, |
22 | struct snd_midi_channel *chan); | |
1da177e4 LT |
23 | /* |
24 | * The next table looks magical, but it certainly is not. Its values have | |
25 | * been calculated as table[i]=8*log(i/64)/log(2) with an obvious exception | |
26 | * for i=0. This log-table converts a linear volume-scaling (0..127) to a | |
27 | * logarithmic scaling as present in the FM-synthesizer chips. so : Volume | |
28 | * 64 = 0 db = relative volume 0 and: Volume 32 = -6 db = relative | |
29 | * volume -8 it was implemented as a table because it is only 128 bytes and | |
30 | * it saves a lot of log() calculations. (Rob Hooft <hooft@chem.ruu.nl>) | |
31 | */ | |
32 | ||
e3de2a40 | 33 | static const char opl3_volume_table[128] = |
1da177e4 LT |
34 | { |
35 | -63, -48, -40, -35, -32, -29, -27, -26, | |
36 | -24, -23, -21, -20, -19, -18, -18, -17, | |
37 | -16, -15, -15, -14, -13, -13, -12, -12, | |
38 | -11, -11, -10, -10, -10, -9, -9, -8, | |
39 | -8, -8, -7, -7, -7, -6, -6, -6, | |
40 | -5, -5, -5, -5, -4, -4, -4, -4, | |
41 | -3, -3, -3, -3, -2, -2, -2, -2, | |
42 | -2, -1, -1, -1, -1, 0, 0, 0, | |
43 | 0, 0, 0, 1, 1, 1, 1, 1, | |
44 | 1, 2, 2, 2, 2, 2, 2, 2, | |
45 | 3, 3, 3, 3, 3, 3, 3, 4, | |
46 | 4, 4, 4, 4, 4, 4, 4, 5, | |
47 | 5, 5, 5, 5, 5, 5, 5, 5, | |
48 | 6, 6, 6, 6, 6, 6, 6, 6, | |
49 | 6, 7, 7, 7, 7, 7, 7, 7, | |
50 | 7, 7, 7, 8, 8, 8, 8, 8 | |
51 | }; | |
52 | ||
53 | void snd_opl3_calc_volume(unsigned char *volbyte, int vel, | |
5b1646a8 | 54 | struct snd_midi_channel *chan) |
1da177e4 LT |
55 | { |
56 | int oldvol, newvol, n; | |
57 | int volume; | |
58 | ||
59 | volume = (vel * chan->gm_volume * chan->gm_expression) / (127*127); | |
60 | if (volume > 127) | |
61 | volume = 127; | |
62 | ||
63 | oldvol = OPL3_TOTAL_LEVEL_MASK - (*volbyte & OPL3_TOTAL_LEVEL_MASK); | |
64 | ||
65 | newvol = opl3_volume_table[volume] + oldvol; | |
66 | if (newvol > OPL3_TOTAL_LEVEL_MASK) | |
67 | newvol = OPL3_TOTAL_LEVEL_MASK; | |
68 | else if (newvol < 0) | |
69 | newvol = 0; | |
70 | ||
71 | n = OPL3_TOTAL_LEVEL_MASK - (newvol & OPL3_TOTAL_LEVEL_MASK); | |
72 | ||
73 | *volbyte = (*volbyte & OPL3_KSL_MASK) | (n & OPL3_TOTAL_LEVEL_MASK); | |
74 | } | |
75 | ||
76 | /* | |
77 | * Converts the note frequency to block and fnum values for the FM chip | |
78 | */ | |
e3de2a40 | 79 | static const short opl3_note_table[16] = |
1da177e4 LT |
80 | { |
81 | 305, 323, /* for pitch bending, -2 semitones */ | |
82 | 343, 363, 385, 408, 432, 458, 485, 514, 544, 577, 611, 647, | |
83 | 686, 726 /* for pitch bending, +2 semitones */ | |
84 | }; | |
85 | ||
86 | static void snd_opl3_calc_pitch(unsigned char *fnum, unsigned char *blocknum, | |
5b1646a8 | 87 | int note, struct snd_midi_channel *chan) |
1da177e4 LT |
88 | { |
89 | int block = ((note / 12) & 0x07) - 1; | |
90 | int idx = (note % 12) + 2; | |
91 | int freq; | |
92 | ||
93 | if (chan->midi_pitchbend) { | |
94 | int pitchbend = chan->midi_pitchbend; | |
95 | int segment; | |
96 | ||
d1243806 DC |
97 | if (pitchbend < -0x2000) |
98 | pitchbend = -0x2000; | |
1da177e4 LT |
99 | if (pitchbend > 0x1FFF) |
100 | pitchbend = 0x1FFF; | |
101 | ||
102 | segment = pitchbend / 0x1000; | |
103 | freq = opl3_note_table[idx+segment]; | |
104 | freq += ((opl3_note_table[idx+segment+1] - freq) * | |
105 | (pitchbend % 0x1000)) / 0x1000; | |
106 | } else { | |
107 | freq = opl3_note_table[idx]; | |
108 | } | |
109 | ||
110 | *fnum = (unsigned char) freq; | |
111 | *blocknum = ((freq >> 8) & OPL3_FNUM_HIGH_MASK) | | |
112 | ((block << 2) & OPL3_BLOCKNUM_MASK); | |
113 | } | |
114 | ||
115 | ||
116 | #ifdef DEBUG_ALLOC | |
a2fa882d TI |
117 | static void debug_alloc(struct snd_opl3 *opl3, char *s, int voice) |
118 | { | |
1da177e4 | 119 | int i; |
a2fa882d TI |
120 | const char *str = "x.24"; |
121 | char buf[MAX_OPL3_VOICES + 1]; | |
1da177e4 | 122 | |
1da177e4 | 123 | for (i = 0; i < opl3->max_voices; i++) |
a2fa882d TI |
124 | buf[i] = str[opl3->voices[i].state + 1]; |
125 | buf[i] = 0; | |
126 | dev_dbg(opl3->card->dev, "time %.5i: %s [%.2i]: %s\n", | |
127 | opl3->use_time, s, voice, buf); | |
1da177e4 LT |
128 | } |
129 | #endif | |
130 | ||
131 | /* | |
132 | * Get a FM voice (channel) to play a note on. | |
133 | */ | |
5b1646a8 TI |
134 | static int opl3_get_voice(struct snd_opl3 *opl3, int instr_4op, |
135 | struct snd_midi_channel *chan) { | |
1da177e4 LT |
136 | int chan_4op_1; /* first voice for 4op instrument */ |
137 | int chan_4op_2; /* second voice for 4op instrument */ | |
138 | ||
5b1646a8 | 139 | struct snd_opl3_voice *vp, *vp2; |
1da177e4 LT |
140 | unsigned int voice_time; |
141 | int i; | |
142 | ||
143 | #ifdef DEBUG_ALLOC | |
144 | char *alloc_type[3] = { "FREE ", "CHEAP ", "EXPENSIVE" }; | |
145 | #endif | |
146 | ||
147 | /* This is our "allocation cost" table */ | |
148 | enum { | |
149 | FREE = 0, CHEAP, EXPENSIVE, END | |
150 | }; | |
151 | ||
152 | /* Keeps track of what we are finding */ | |
153 | struct best { | |
154 | unsigned int time; | |
155 | int voice; | |
156 | } best[END]; | |
157 | struct best *bp; | |
158 | ||
159 | for (i = 0; i < END; i++) { | |
395d9dd5 | 160 | best[i].time = (unsigned int)(-1); /* XXX MAX_?INT really */ |
1da177e4 LT |
161 | best[i].voice = -1; |
162 | } | |
163 | ||
164 | /* Look through all the channels for the most suitable. */ | |
165 | for (i = 0; i < opl3->max_voices; i++) { | |
166 | vp = &opl3->voices[i]; | |
167 | ||
168 | if (vp->state == SNDRV_OPL3_ST_NOT_AVAIL) | |
169 | /* skip unavailable channels, allocated by | |
170 | drum voices or by bounded 4op voices) */ | |
171 | continue; | |
172 | ||
173 | voice_time = vp->time; | |
174 | bp = best; | |
175 | ||
176 | chan_4op_1 = ((i < 3) || (i > 8 && i < 12)); | |
177 | chan_4op_2 = ((i > 2 && i < 6) || (i > 11 && i < 15)); | |
178 | if (instr_4op) { | |
179 | /* allocate 4op voice */ | |
180 | /* skip channels unavailable to 4op instrument */ | |
181 | if (!chan_4op_1) | |
182 | continue; | |
183 | ||
184 | if (vp->state) | |
185 | /* kill one voice, CHEAP */ | |
186 | bp++; | |
187 | /* get state of bounded 2op channel | |
188 | to be allocated for 4op instrument */ | |
189 | vp2 = &opl3->voices[i + 3]; | |
190 | if (vp2->state == SNDRV_OPL3_ST_ON_2OP) { | |
191 | /* kill two voices, EXPENSIVE */ | |
192 | bp++; | |
93a5b85c | 193 | voice_time = max(voice_time, vp2->time); |
1da177e4 LT |
194 | } |
195 | } else { | |
196 | /* allocate 2op voice */ | |
197 | if ((chan_4op_1) || (chan_4op_2)) | |
198 | /* use bounded channels for 2op, CHEAP */ | |
199 | bp++; | |
200 | else if (vp->state) | |
201 | /* kill one voice on 2op channel, CHEAP */ | |
202 | bp++; | |
203 | /* raise kill cost to EXPENSIVE for all channels */ | |
204 | if (vp->state) | |
205 | bp++; | |
206 | } | |
207 | if (voice_time < bp->time) { | |
208 | bp->time = voice_time; | |
209 | bp->voice = i; | |
210 | } | |
211 | } | |
212 | ||
213 | for (i = 0; i < END; i++) { | |
214 | if (best[i].voice >= 0) { | |
215 | #ifdef DEBUG_ALLOC | |
a2fa882d TI |
216 | dev_dbg(opl3->card->dev, |
217 | "%s %iop allocation on voice %i\n", | |
218 | alloc_type[i], instr_4op ? 4 : 2, | |
219 | best[i].voice); | |
1da177e4 LT |
220 | #endif |
221 | return best[i].voice; | |
222 | } | |
223 | } | |
224 | /* not found */ | |
225 | return -1; | |
226 | } | |
227 | ||
228 | /* ------------------------------ */ | |
229 | ||
230 | /* | |
231 | * System timer interrupt function | |
232 | */ | |
bc47ba90 | 233 | void snd_opl3_timer_func(struct timer_list *t) |
1da177e4 LT |
234 | { |
235 | ||
bc47ba90 | 236 | struct snd_opl3 *opl3 = from_timer(opl3, t, tlist); |
b32425ac | 237 | unsigned long flags; |
1da177e4 LT |
238 | int again = 0; |
239 | int i; | |
240 | ||
8dce39b8 | 241 | spin_lock_irqsave(&opl3->voice_lock, flags); |
1da177e4 | 242 | for (i = 0; i < opl3->max_voices; i++) { |
5b1646a8 | 243 | struct snd_opl3_voice *vp = &opl3->voices[i]; |
1da177e4 LT |
244 | if (vp->state > 0 && vp->note_off_check) { |
245 | if (vp->note_off == jiffies) | |
8dce39b8 KH |
246 | snd_opl3_note_off_unsafe(opl3, vp->note, 0, |
247 | vp->chan); | |
1da177e4 LT |
248 | else |
249 | again++; | |
250 | } | |
251 | } | |
8dce39b8 KH |
252 | spin_unlock_irqrestore(&opl3->voice_lock, flags); |
253 | ||
254 | spin_lock_irqsave(&opl3->sys_timer_lock, flags); | |
f5d5f75f TI |
255 | if (again) |
256 | mod_timer(&opl3->tlist, jiffies + 1); /* invoke again */ | |
257 | else | |
1da177e4 | 258 | opl3->sys_timer_status = 0; |
b32425ac | 259 | spin_unlock_irqrestore(&opl3->sys_timer_lock, flags); |
1da177e4 LT |
260 | } |
261 | ||
262 | /* | |
263 | * Start system timer | |
264 | */ | |
5b1646a8 | 265 | static void snd_opl3_start_timer(struct snd_opl3 *opl3) |
1da177e4 LT |
266 | { |
267 | unsigned long flags; | |
268 | spin_lock_irqsave(&opl3->sys_timer_lock, flags); | |
269 | if (! opl3->sys_timer_status) { | |
f5d5f75f | 270 | mod_timer(&opl3->tlist, jiffies + 1); |
1da177e4 LT |
271 | opl3->sys_timer_status = 1; |
272 | } | |
273 | spin_unlock_irqrestore(&opl3->sys_timer_lock, flags); | |
274 | } | |
275 | ||
276 | /* ------------------------------ */ | |
277 | ||
278 | ||
e3de2a40 | 279 | static const int snd_opl3_oss_map[MAX_OPL3_VOICES] = { |
1da177e4 LT |
280 | 0, 1, 2, 9, 10, 11, 6, 7, 8, 15, 16, 17, 3, 4 ,5, 12, 13, 14 |
281 | }; | |
282 | ||
283 | /* | |
284 | * Start a note. | |
285 | */ | |
5b1646a8 | 286 | void snd_opl3_note_on(void *p, int note, int vel, struct snd_midi_channel *chan) |
1da177e4 | 287 | { |
5b1646a8 | 288 | struct snd_opl3 *opl3; |
1da177e4 LT |
289 | int instr_4op; |
290 | ||
291 | int voice; | |
5b1646a8 | 292 | struct snd_opl3_voice *vp, *vp2; |
1da177e4 LT |
293 | unsigned short connect_mask; |
294 | unsigned char connection; | |
295 | unsigned char vol_op[4]; | |
296 | ||
297 | int extra_prg = 0; | |
298 | ||
299 | unsigned short reg_side; | |
300 | unsigned char op_offset; | |
301 | unsigned char voice_offset; | |
302 | unsigned short opl3_reg; | |
303 | unsigned char reg_val; | |
224a0332 | 304 | unsigned char prg, bank; |
1da177e4 LT |
305 | |
306 | int key = note; | |
307 | unsigned char fnum, blocknum; | |
308 | int i; | |
309 | ||
224a0332 | 310 | struct fm_patch *patch; |
5b1646a8 | 311 | struct fm_instrument *fm; |
1da177e4 LT |
312 | unsigned long flags; |
313 | ||
314 | opl3 = p; | |
315 | ||
a2fa882d TI |
316 | opl3_dbg(opl3, "Note on, ch %i, inst %i, note %i, vel %i\n", |
317 | chan->number, chan->midi_program, note, vel); | |
1da177e4 LT |
318 | |
319 | /* in SYNTH mode, application takes care of voices */ | |
320 | /* in SEQ mode, drum voice numbers are notes on drum channel */ | |
321 | if (opl3->synth_mode == SNDRV_OPL3_MODE_SEQ) { | |
322 | if (chan->drum_channel) { | |
323 | /* percussion instruments are located in bank 128 */ | |
224a0332 TI |
324 | bank = 128; |
325 | prg = note; | |
1da177e4 | 326 | } else { |
224a0332 TI |
327 | bank = chan->gm_bank_select; |
328 | prg = chan->midi_program; | |
1da177e4 LT |
329 | } |
330 | } else { | |
331 | /* Prepare for OSS mode */ | |
332 | if (chan->number >= MAX_OPL3_VOICES) | |
333 | return; | |
334 | ||
335 | /* OSS instruments are located in bank 127 */ | |
224a0332 TI |
336 | bank = 127; |
337 | prg = chan->midi_program; | |
1da177e4 LT |
338 | } |
339 | ||
340 | spin_lock_irqsave(&opl3->voice_lock, flags); | |
341 | ||
342 | if (use_internal_drums) { | |
343 | snd_opl3_drum_switch(opl3, note, vel, 1, chan); | |
344 | spin_unlock_irqrestore(&opl3->voice_lock, flags); | |
345 | return; | |
346 | } | |
347 | ||
348 | __extra_prg: | |
224a0332 TI |
349 | patch = snd_opl3_find_patch(opl3, prg, bank, 0); |
350 | if (!patch) { | |
1da177e4 LT |
351 | spin_unlock_irqrestore(&opl3->voice_lock, flags); |
352 | return; | |
353 | } | |
354 | ||
224a0332 TI |
355 | fm = &patch->inst; |
356 | switch (patch->type) { | |
1da177e4 LT |
357 | case FM_PATCH_OPL2: |
358 | instr_4op = 0; | |
359 | break; | |
360 | case FM_PATCH_OPL3: | |
361 | if (opl3->hardware >= OPL3_HW_OPL3) { | |
362 | instr_4op = 1; | |
363 | break; | |
364 | } | |
c0dbbdad | 365 | fallthrough; |
1da177e4 | 366 | default: |
1da177e4 LT |
367 | spin_unlock_irqrestore(&opl3->voice_lock, flags); |
368 | return; | |
369 | } | |
a2fa882d TI |
370 | opl3_dbg(opl3, " --> OPL%i instrument: %s\n", |
371 | instr_4op ? 3 : 2, patch->name); | |
1da177e4 LT |
372 | /* in SYNTH mode, application takes care of voices */ |
373 | /* in SEQ mode, allocate voice on free OPL3 channel */ | |
374 | if (opl3->synth_mode == SNDRV_OPL3_MODE_SEQ) { | |
375 | voice = opl3_get_voice(opl3, instr_4op, chan); | |
376 | } else { | |
377 | /* remap OSS voice */ | |
378 | voice = snd_opl3_oss_map[chan->number]; | |
379 | } | |
380 | ||
a8d09e3a TI |
381 | if (voice < 0) { |
382 | spin_unlock_irqrestore(&opl3->voice_lock, flags); | |
383 | return; | |
384 | } | |
385 | ||
1da177e4 LT |
386 | if (voice < MAX_OPL2_VOICES) { |
387 | /* Left register block for voices 0 .. 8 */ | |
388 | reg_side = OPL3_LEFT; | |
389 | voice_offset = voice; | |
390 | connect_mask = (OPL3_LEFT_4OP_0 << voice_offset) & 0x07; | |
391 | } else { | |
392 | /* Right register block for voices 9 .. 17 */ | |
393 | reg_side = OPL3_RIGHT; | |
394 | voice_offset = voice - MAX_OPL2_VOICES; | |
395 | connect_mask = (OPL3_RIGHT_4OP_0 << voice_offset) & 0x38; | |
396 | } | |
397 | ||
398 | /* kill voice on channel */ | |
399 | vp = &opl3->voices[voice]; | |
400 | if (vp->state > 0) { | |
401 | opl3_reg = reg_side | (OPL3_REG_KEYON_BLOCK + voice_offset); | |
402 | reg_val = vp->keyon_reg & ~OPL3_KEYON_BIT; | |
403 | opl3->command(opl3, opl3_reg, reg_val); | |
404 | } | |
405 | if (instr_4op) { | |
406 | vp2 = &opl3->voices[voice + 3]; | |
2dee54b2 | 407 | if (vp2->state > 0) { |
1da177e4 LT |
408 | opl3_reg = reg_side | (OPL3_REG_KEYON_BLOCK + |
409 | voice_offset + 3); | |
410 | reg_val = vp->keyon_reg & ~OPL3_KEYON_BIT; | |
411 | opl3->command(opl3, opl3_reg, reg_val); | |
412 | } | |
413 | } | |
414 | ||
415 | /* set connection register */ | |
416 | if (instr_4op) { | |
417 | if ((opl3->connection_reg ^ connect_mask) & connect_mask) { | |
418 | opl3->connection_reg |= connect_mask; | |
419 | /* set connection bit */ | |
420 | opl3_reg = OPL3_RIGHT | OPL3_REG_CONNECTION_SELECT; | |
421 | opl3->command(opl3, opl3_reg, opl3->connection_reg); | |
422 | } | |
423 | } else { | |
424 | if ((opl3->connection_reg ^ ~connect_mask) & connect_mask) { | |
425 | opl3->connection_reg &= ~connect_mask; | |
426 | /* clear connection bit */ | |
427 | opl3_reg = OPL3_RIGHT | OPL3_REG_CONNECTION_SELECT; | |
428 | opl3->command(opl3, opl3_reg, opl3->connection_reg); | |
429 | } | |
430 | } | |
431 | ||
a2fa882d TI |
432 | opl3_dbg(opl3, " --> setting OPL3 connection: 0x%x\n", |
433 | opl3->connection_reg); | |
1da177e4 LT |
434 | /* |
435 | * calculate volume depending on connection | |
436 | * between FM operators (see include/opl3.h) | |
437 | */ | |
438 | for (i = 0; i < (instr_4op ? 4 : 2); i++) | |
439 | vol_op[i] = fm->op[i].ksl_level; | |
440 | ||
441 | connection = fm->feedback_connection[0] & 0x01; | |
442 | if (instr_4op) { | |
443 | connection <<= 1; | |
444 | connection |= fm->feedback_connection[1] & 0x01; | |
445 | ||
446 | snd_opl3_calc_volume(&vol_op[3], vel, chan); | |
447 | switch (connection) { | |
448 | case 0x03: | |
449 | snd_opl3_calc_volume(&vol_op[2], vel, chan); | |
c0dbbdad | 450 | fallthrough; |
1da177e4 LT |
451 | case 0x02: |
452 | snd_opl3_calc_volume(&vol_op[0], vel, chan); | |
453 | break; | |
454 | case 0x01: | |
455 | snd_opl3_calc_volume(&vol_op[1], vel, chan); | |
456 | } | |
457 | } else { | |
458 | snd_opl3_calc_volume(&vol_op[1], vel, chan); | |
459 | if (connection) | |
460 | snd_opl3_calc_volume(&vol_op[0], vel, chan); | |
461 | } | |
462 | ||
463 | /* Program the FM voice characteristics */ | |
464 | for (i = 0; i < (instr_4op ? 4 : 2); i++) { | |
a2fa882d | 465 | opl3_dbg(opl3, " --> programming operator %i\n", i); |
1da177e4 LT |
466 | op_offset = snd_opl3_regmap[voice_offset][i]; |
467 | ||
468 | /* Set OPL3 AM_VIB register of requested voice/operator */ | |
469 | reg_val = fm->op[i].am_vib; | |
470 | opl3_reg = reg_side | (OPL3_REG_AM_VIB + op_offset); | |
471 | opl3->command(opl3, opl3_reg, reg_val); | |
472 | ||
473 | /* Set OPL3 KSL_LEVEL register of requested voice/operator */ | |
474 | reg_val = vol_op[i]; | |
475 | opl3_reg = reg_side | (OPL3_REG_KSL_LEVEL + op_offset); | |
476 | opl3->command(opl3, opl3_reg, reg_val); | |
477 | ||
478 | /* Set OPL3 ATTACK_DECAY register of requested voice/operator */ | |
479 | reg_val = fm->op[i].attack_decay; | |
480 | opl3_reg = reg_side | (OPL3_REG_ATTACK_DECAY + op_offset); | |
481 | opl3->command(opl3, opl3_reg, reg_val); | |
482 | ||
483 | /* Set OPL3 SUSTAIN_RELEASE register of requested voice/operator */ | |
484 | reg_val = fm->op[i].sustain_release; | |
485 | opl3_reg = reg_side | (OPL3_REG_SUSTAIN_RELEASE + op_offset); | |
486 | opl3->command(opl3, opl3_reg, reg_val); | |
487 | ||
488 | /* Select waveform */ | |
489 | reg_val = fm->op[i].wave_select; | |
490 | opl3_reg = reg_side | (OPL3_REG_WAVE_SELECT + op_offset); | |
491 | opl3->command(opl3, opl3_reg, reg_val); | |
492 | } | |
493 | ||
494 | /* Set operator feedback and 2op inter-operator connection */ | |
495 | reg_val = fm->feedback_connection[0]; | |
496 | /* Set output voice connection */ | |
497 | reg_val |= OPL3_STEREO_BITS; | |
498 | if (chan->gm_pan < 43) | |
499 | reg_val &= ~OPL3_VOICE_TO_RIGHT; | |
500 | if (chan->gm_pan > 85) | |
501 | reg_val &= ~OPL3_VOICE_TO_LEFT; | |
502 | opl3_reg = reg_side | (OPL3_REG_FEEDBACK_CONNECTION + voice_offset); | |
503 | opl3->command(opl3, opl3_reg, reg_val); | |
504 | ||
505 | if (instr_4op) { | |
506 | /* Set 4op inter-operator connection */ | |
507 | reg_val = fm->feedback_connection[1] & OPL3_CONNECTION_BIT; | |
508 | /* Set output voice connection */ | |
509 | reg_val |= OPL3_STEREO_BITS; | |
510 | if (chan->gm_pan < 43) | |
511 | reg_val &= ~OPL3_VOICE_TO_RIGHT; | |
512 | if (chan->gm_pan > 85) | |
513 | reg_val &= ~OPL3_VOICE_TO_LEFT; | |
514 | opl3_reg = reg_side | (OPL3_REG_FEEDBACK_CONNECTION + | |
515 | voice_offset + 3); | |
516 | opl3->command(opl3, opl3_reg, reg_val); | |
517 | } | |
518 | ||
519 | /* | |
520 | * Special treatment of percussion notes for fm: | |
521 | * Requested pitch is really program, and pitch for | |
522 | * device is whatever was specified in the patch library. | |
523 | */ | |
524 | if (fm->fix_key) | |
525 | note = fm->fix_key; | |
526 | /* | |
527 | * use transpose if defined in patch library | |
528 | */ | |
529 | if (fm->trnsps) | |
530 | note += (fm->trnsps - 64); | |
531 | ||
532 | snd_opl3_calc_pitch(&fnum, &blocknum, note, chan); | |
533 | ||
534 | /* Set OPL3 FNUM_LOW register of requested voice */ | |
535 | opl3_reg = reg_side | (OPL3_REG_FNUM_LOW + voice_offset); | |
536 | opl3->command(opl3, opl3_reg, fnum); | |
537 | ||
538 | opl3->voices[voice].keyon_reg = blocknum; | |
539 | ||
540 | /* Set output sound flag */ | |
541 | blocknum |= OPL3_KEYON_BIT; | |
542 | ||
a2fa882d | 543 | opl3_dbg(opl3, " --> trigger voice %i\n", voice); |
1da177e4 LT |
544 | /* Set OPL3 KEYON_BLOCK register of requested voice */ |
545 | opl3_reg = reg_side | (OPL3_REG_KEYON_BLOCK + voice_offset); | |
546 | opl3->command(opl3, opl3_reg, blocknum); | |
547 | ||
548 | /* kill note after fixed duration (in centiseconds) */ | |
549 | if (fm->fix_dur) { | |
550 | opl3->voices[voice].note_off = jiffies + | |
551 | (fm->fix_dur * HZ) / 100; | |
552 | snd_opl3_start_timer(opl3); | |
553 | opl3->voices[voice].note_off_check = 1; | |
554 | } else | |
555 | opl3->voices[voice].note_off_check = 0; | |
556 | ||
557 | /* get extra pgm, but avoid possible loops */ | |
558 | extra_prg = (extra_prg) ? 0 : fm->modes; | |
559 | ||
1da177e4 LT |
560 | /* do the bookkeeping */ |
561 | vp->time = opl3->use_time++; | |
562 | vp->note = key; | |
563 | vp->chan = chan; | |
564 | ||
565 | if (instr_4op) { | |
566 | vp->state = SNDRV_OPL3_ST_ON_4OP; | |
567 | ||
568 | vp2 = &opl3->voices[voice + 3]; | |
569 | vp2->time = opl3->use_time++; | |
570 | vp2->note = key; | |
571 | vp2->chan = chan; | |
572 | vp2->state = SNDRV_OPL3_ST_NOT_AVAIL; | |
573 | } else { | |
574 | if (vp->state == SNDRV_OPL3_ST_ON_4OP) { | |
575 | /* 4op killed by 2op, release bounded voice */ | |
576 | vp2 = &opl3->voices[voice + 3]; | |
577 | vp2->time = opl3->use_time++; | |
578 | vp2->state = SNDRV_OPL3_ST_OFF; | |
579 | } | |
580 | vp->state = SNDRV_OPL3_ST_ON_2OP; | |
581 | } | |
582 | ||
583 | #ifdef DEBUG_ALLOC | |
584 | debug_alloc(opl3, "note on ", voice); | |
585 | #endif | |
586 | ||
587 | /* allocate extra program if specified in patch library */ | |
588 | if (extra_prg) { | |
589 | if (extra_prg > 128) { | |
224a0332 | 590 | bank = 128; |
1da177e4 | 591 | /* percussions start at 35 */ |
224a0332 | 592 | prg = extra_prg - 128 + 35 - 1; |
1da177e4 | 593 | } else { |
224a0332 TI |
594 | bank = 0; |
595 | prg = extra_prg - 1; | |
1da177e4 | 596 | } |
a2fa882d | 597 | opl3_dbg(opl3, " *** allocating extra program\n"); |
1da177e4 LT |
598 | goto __extra_prg; |
599 | } | |
600 | spin_unlock_irqrestore(&opl3->voice_lock, flags); | |
601 | } | |
602 | ||
5b1646a8 | 603 | static void snd_opl3_kill_voice(struct snd_opl3 *opl3, int voice) |
1da177e4 LT |
604 | { |
605 | unsigned short reg_side; | |
606 | unsigned char voice_offset; | |
607 | unsigned short opl3_reg; | |
608 | ||
5b1646a8 | 609 | struct snd_opl3_voice *vp, *vp2; |
1da177e4 | 610 | |
5e246b85 TI |
611 | if (snd_BUG_ON(voice >= MAX_OPL3_VOICES)) |
612 | return; | |
1da177e4 LT |
613 | |
614 | vp = &opl3->voices[voice]; | |
615 | if (voice < MAX_OPL2_VOICES) { | |
616 | /* Left register block for voices 0 .. 8 */ | |
617 | reg_side = OPL3_LEFT; | |
618 | voice_offset = voice; | |
619 | } else { | |
620 | /* Right register block for voices 9 .. 17 */ | |
621 | reg_side = OPL3_RIGHT; | |
622 | voice_offset = voice - MAX_OPL2_VOICES; | |
623 | } | |
624 | ||
625 | /* kill voice */ | |
a2fa882d | 626 | opl3_dbg(opl3, " --> kill voice %i\n", voice); |
1da177e4 LT |
627 | opl3_reg = reg_side | (OPL3_REG_KEYON_BLOCK + voice_offset); |
628 | /* clear Key ON bit */ | |
629 | opl3->command(opl3, opl3_reg, vp->keyon_reg); | |
630 | ||
631 | /* do the bookkeeping */ | |
632 | vp->time = opl3->use_time++; | |
633 | ||
634 | if (vp->state == SNDRV_OPL3_ST_ON_4OP) { | |
635 | vp2 = &opl3->voices[voice + 3]; | |
636 | ||
637 | vp2->time = opl3->use_time++; | |
638 | vp2->state = SNDRV_OPL3_ST_OFF; | |
639 | } | |
640 | vp->state = SNDRV_OPL3_ST_OFF; | |
641 | #ifdef DEBUG_ALLOC | |
642 | debug_alloc(opl3, "note off", voice); | |
643 | #endif | |
644 | ||
645 | } | |
646 | ||
647 | /* | |
648 | * Release a note in response to a midi note off. | |
649 | */ | |
8dce39b8 KH |
650 | static void snd_opl3_note_off_unsafe(void *p, int note, int vel, |
651 | struct snd_midi_channel *chan) | |
1da177e4 | 652 | { |
5b1646a8 | 653 | struct snd_opl3 *opl3; |
1da177e4 LT |
654 | |
655 | int voice; | |
5b1646a8 | 656 | struct snd_opl3_voice *vp; |
1da177e4 | 657 | |
1da177e4 LT |
658 | opl3 = p; |
659 | ||
a2fa882d TI |
660 | opl3_dbg(opl3, "Note off, ch %i, inst %i, note %i\n", |
661 | chan->number, chan->midi_program, note); | |
1da177e4 | 662 | |
1da177e4 LT |
663 | if (opl3->synth_mode == SNDRV_OPL3_MODE_SEQ) { |
664 | if (chan->drum_channel && use_internal_drums) { | |
665 | snd_opl3_drum_switch(opl3, note, vel, 0, chan); | |
1da177e4 LT |
666 | return; |
667 | } | |
668 | /* this loop will hopefully kill all extra voices, because | |
669 | they are grouped by the same channel and note values */ | |
670 | for (voice = 0; voice < opl3->max_voices; voice++) { | |
671 | vp = &opl3->voices[voice]; | |
672 | if (vp->state > 0 && vp->chan == chan && vp->note == note) { | |
673 | snd_opl3_kill_voice(opl3, voice); | |
674 | } | |
675 | } | |
676 | } else { | |
677 | /* remap OSS voices */ | |
678 | if (chan->number < MAX_OPL3_VOICES) { | |
679 | voice = snd_opl3_oss_map[chan->number]; | |
680 | snd_opl3_kill_voice(opl3, voice); | |
681 | } | |
682 | } | |
8dce39b8 KH |
683 | } |
684 | ||
685 | void snd_opl3_note_off(void *p, int note, int vel, | |
686 | struct snd_midi_channel *chan) | |
687 | { | |
688 | struct snd_opl3 *opl3 = p; | |
689 | unsigned long flags; | |
690 | ||
691 | spin_lock_irqsave(&opl3->voice_lock, flags); | |
692 | snd_opl3_note_off_unsafe(p, note, vel, chan); | |
1da177e4 LT |
693 | spin_unlock_irqrestore(&opl3->voice_lock, flags); |
694 | } | |
695 | ||
696 | /* | |
697 | * key pressure change | |
698 | */ | |
5b1646a8 | 699 | void snd_opl3_key_press(void *p, int note, int vel, struct snd_midi_channel *chan) |
1da177e4 | 700 | { |
a2fa882d TI |
701 | opl3_dbg(p, "Key pressure, ch#: %i, inst#: %i\n", |
702 | chan->number, chan->midi_program); | |
1da177e4 LT |
703 | } |
704 | ||
705 | /* | |
706 | * terminate note | |
707 | */ | |
5b1646a8 | 708 | void snd_opl3_terminate_note(void *p, int note, struct snd_midi_channel *chan) |
1da177e4 | 709 | { |
a2fa882d TI |
710 | opl3_dbg(p, "Terminate note, ch#: %i, inst#: %i\n", |
711 | chan->number, chan->midi_program); | |
1da177e4 LT |
712 | } |
713 | ||
5b1646a8 | 714 | static void snd_opl3_update_pitch(struct snd_opl3 *opl3, int voice) |
1da177e4 LT |
715 | { |
716 | unsigned short reg_side; | |
717 | unsigned char voice_offset; | |
718 | unsigned short opl3_reg; | |
719 | ||
720 | unsigned char fnum, blocknum; | |
721 | ||
5b1646a8 | 722 | struct snd_opl3_voice *vp; |
1da177e4 | 723 | |
5e246b85 TI |
724 | if (snd_BUG_ON(voice >= MAX_OPL3_VOICES)) |
725 | return; | |
1da177e4 LT |
726 | |
727 | vp = &opl3->voices[voice]; | |
728 | if (vp->chan == NULL) | |
729 | return; /* not allocated? */ | |
730 | ||
731 | if (voice < MAX_OPL2_VOICES) { | |
732 | /* Left register block for voices 0 .. 8 */ | |
733 | reg_side = OPL3_LEFT; | |
734 | voice_offset = voice; | |
735 | } else { | |
736 | /* Right register block for voices 9 .. 17 */ | |
737 | reg_side = OPL3_RIGHT; | |
738 | voice_offset = voice - MAX_OPL2_VOICES; | |
739 | } | |
740 | ||
741 | snd_opl3_calc_pitch(&fnum, &blocknum, vp->note, vp->chan); | |
742 | ||
743 | /* Set OPL3 FNUM_LOW register of requested voice */ | |
744 | opl3_reg = reg_side | (OPL3_REG_FNUM_LOW + voice_offset); | |
745 | opl3->command(opl3, opl3_reg, fnum); | |
746 | ||
747 | vp->keyon_reg = blocknum; | |
748 | ||
749 | /* Set output sound flag */ | |
750 | blocknum |= OPL3_KEYON_BIT; | |
751 | ||
752 | /* Set OPL3 KEYON_BLOCK register of requested voice */ | |
753 | opl3_reg = reg_side | (OPL3_REG_KEYON_BLOCK + voice_offset); | |
754 | opl3->command(opl3, opl3_reg, blocknum); | |
755 | ||
756 | vp->time = opl3->use_time++; | |
757 | } | |
758 | ||
759 | /* | |
760 | * Update voice pitch controller | |
761 | */ | |
5b1646a8 | 762 | static void snd_opl3_pitch_ctrl(struct snd_opl3 *opl3, struct snd_midi_channel *chan) |
1da177e4 LT |
763 | { |
764 | int voice; | |
5b1646a8 | 765 | struct snd_opl3_voice *vp; |
1da177e4 LT |
766 | |
767 | unsigned long flags; | |
768 | ||
769 | spin_lock_irqsave(&opl3->voice_lock, flags); | |
770 | ||
771 | if (opl3->synth_mode == SNDRV_OPL3_MODE_SEQ) { | |
772 | for (voice = 0; voice < opl3->max_voices; voice++) { | |
773 | vp = &opl3->voices[voice]; | |
774 | if (vp->state > 0 && vp->chan == chan) { | |
775 | snd_opl3_update_pitch(opl3, voice); | |
776 | } | |
777 | } | |
778 | } else { | |
779 | /* remap OSS voices */ | |
780 | if (chan->number < MAX_OPL3_VOICES) { | |
781 | voice = snd_opl3_oss_map[chan->number]; | |
782 | snd_opl3_update_pitch(opl3, voice); | |
783 | } | |
784 | } | |
785 | spin_unlock_irqrestore(&opl3->voice_lock, flags); | |
786 | } | |
787 | ||
788 | /* | |
3a4fa0a2 | 789 | * Deal with a controller type event. This includes all types of |
1da177e4 LT |
790 | * control events, not just the midi controllers |
791 | */ | |
5b1646a8 | 792 | void snd_opl3_control(void *p, int type, struct snd_midi_channel *chan) |
1da177e4 | 793 | { |
5b1646a8 | 794 | struct snd_opl3 *opl3; |
1da177e4 LT |
795 | |
796 | opl3 = p; | |
a2fa882d TI |
797 | opl3_dbg(opl3, "Controller, TYPE = %i, ch#: %i, inst#: %i\n", |
798 | type, chan->number, chan->midi_program); | |
1da177e4 LT |
799 | |
800 | switch (type) { | |
801 | case MIDI_CTL_MSB_MODWHEEL: | |
802 | if (chan->control[MIDI_CTL_MSB_MODWHEEL] > 63) | |
803 | opl3->drum_reg |= OPL3_VIBRATO_DEPTH; | |
804 | else | |
805 | opl3->drum_reg &= ~OPL3_VIBRATO_DEPTH; | |
806 | opl3->command(opl3, OPL3_LEFT | OPL3_REG_PERCUSSION, | |
807 | opl3->drum_reg); | |
808 | break; | |
809 | case MIDI_CTL_E2_TREMOLO_DEPTH: | |
810 | if (chan->control[MIDI_CTL_E2_TREMOLO_DEPTH] > 63) | |
811 | opl3->drum_reg |= OPL3_TREMOLO_DEPTH; | |
812 | else | |
813 | opl3->drum_reg &= ~OPL3_TREMOLO_DEPTH; | |
814 | opl3->command(opl3, OPL3_LEFT | OPL3_REG_PERCUSSION, | |
815 | opl3->drum_reg); | |
816 | break; | |
817 | case MIDI_CTL_PITCHBEND: | |
818 | snd_opl3_pitch_ctrl(opl3, chan); | |
819 | break; | |
820 | } | |
821 | } | |
822 | ||
823 | /* | |
824 | * NRPN events | |
825 | */ | |
5b1646a8 TI |
826 | void snd_opl3_nrpn(void *p, struct snd_midi_channel *chan, |
827 | struct snd_midi_channel_set *chset) | |
1da177e4 | 828 | { |
a2fa882d TI |
829 | opl3_dbg(p, "NRPN, ch#: %i, inst#: %i\n", |
830 | chan->number, chan->midi_program); | |
1da177e4 LT |
831 | } |
832 | ||
833 | /* | |
834 | * receive sysex | |
835 | */ | |
836 | void snd_opl3_sysex(void *p, unsigned char *buf, int len, | |
5b1646a8 | 837 | int parsed, struct snd_midi_channel_set *chset) |
1da177e4 | 838 | { |
a2fa882d | 839 | opl3_dbg(p, "SYSEX\n"); |
1da177e4 | 840 | } |