Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * Copyright (c) by Uros Bizjak <uros@kss-loka.si> | |
3 | * | |
4 | * Midi synth routines for OPL2/OPL3/OPL4 FM | |
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 | #undef DEBUG_ALLOC | |
23 | #undef DEBUG_MIDI | |
24 | ||
25 | #include "opl3_voice.h" | |
26 | #include <sound/asoundef.h> | |
27 | ||
28 | extern char snd_opl3_regmap[MAX_OPL2_VOICES][4]; | |
29 | ||
a67ff6a5 | 30 | extern bool use_internal_drums; |
1da177e4 | 31 | |
8dce39b8 KH |
32 | static void snd_opl3_note_off_unsafe(void *p, int note, int vel, |
33 | struct snd_midi_channel *chan); | |
1da177e4 LT |
34 | /* |
35 | * The next table looks magical, but it certainly is not. Its values have | |
36 | * been calculated as table[i]=8*log(i/64)/log(2) with an obvious exception | |
37 | * for i=0. This log-table converts a linear volume-scaling (0..127) to a | |
38 | * logarithmic scaling as present in the FM-synthesizer chips. so : Volume | |
39 | * 64 = 0 db = relative volume 0 and: Volume 32 = -6 db = relative | |
40 | * volume -8 it was implemented as a table because it is only 128 bytes and | |
41 | * it saves a lot of log() calculations. (Rob Hooft <hooft@chem.ruu.nl>) | |
42 | */ | |
43 | ||
44 | static char opl3_volume_table[128] = | |
45 | { | |
46 | -63, -48, -40, -35, -32, -29, -27, -26, | |
47 | -24, -23, -21, -20, -19, -18, -18, -17, | |
48 | -16, -15, -15, -14, -13, -13, -12, -12, | |
49 | -11, -11, -10, -10, -10, -9, -9, -8, | |
50 | -8, -8, -7, -7, -7, -6, -6, -6, | |
51 | -5, -5, -5, -5, -4, -4, -4, -4, | |
52 | -3, -3, -3, -3, -2, -2, -2, -2, | |
53 | -2, -1, -1, -1, -1, 0, 0, 0, | |
54 | 0, 0, 0, 1, 1, 1, 1, 1, | |
55 | 1, 2, 2, 2, 2, 2, 2, 2, | |
56 | 3, 3, 3, 3, 3, 3, 3, 4, | |
57 | 4, 4, 4, 4, 4, 4, 4, 5, | |
58 | 5, 5, 5, 5, 5, 5, 5, 5, | |
59 | 6, 6, 6, 6, 6, 6, 6, 6, | |
60 | 6, 7, 7, 7, 7, 7, 7, 7, | |
61 | 7, 7, 7, 8, 8, 8, 8, 8 | |
62 | }; | |
63 | ||
64 | void snd_opl3_calc_volume(unsigned char *volbyte, int vel, | |
5b1646a8 | 65 | struct snd_midi_channel *chan) |
1da177e4 LT |
66 | { |
67 | int oldvol, newvol, n; | |
68 | int volume; | |
69 | ||
70 | volume = (vel * chan->gm_volume * chan->gm_expression) / (127*127); | |
71 | if (volume > 127) | |
72 | volume = 127; | |
73 | ||
74 | oldvol = OPL3_TOTAL_LEVEL_MASK - (*volbyte & OPL3_TOTAL_LEVEL_MASK); | |
75 | ||
76 | newvol = opl3_volume_table[volume] + oldvol; | |
77 | if (newvol > OPL3_TOTAL_LEVEL_MASK) | |
78 | newvol = OPL3_TOTAL_LEVEL_MASK; | |
79 | else if (newvol < 0) | |
80 | newvol = 0; | |
81 | ||
82 | n = OPL3_TOTAL_LEVEL_MASK - (newvol & OPL3_TOTAL_LEVEL_MASK); | |
83 | ||
84 | *volbyte = (*volbyte & OPL3_KSL_MASK) | (n & OPL3_TOTAL_LEVEL_MASK); | |
85 | } | |
86 | ||
87 | /* | |
88 | * Converts the note frequency to block and fnum values for the FM chip | |
89 | */ | |
90 | static short opl3_note_table[16] = | |
91 | { | |
92 | 305, 323, /* for pitch bending, -2 semitones */ | |
93 | 343, 363, 385, 408, 432, 458, 485, 514, 544, 577, 611, 647, | |
94 | 686, 726 /* for pitch bending, +2 semitones */ | |
95 | }; | |
96 | ||
97 | static void snd_opl3_calc_pitch(unsigned char *fnum, unsigned char *blocknum, | |
5b1646a8 | 98 | int note, struct snd_midi_channel *chan) |
1da177e4 LT |
99 | { |
100 | int block = ((note / 12) & 0x07) - 1; | |
101 | int idx = (note % 12) + 2; | |
102 | int freq; | |
103 | ||
104 | if (chan->midi_pitchbend) { | |
105 | int pitchbend = chan->midi_pitchbend; | |
106 | int segment; | |
107 | ||
d1243806 DC |
108 | if (pitchbend < -0x2000) |
109 | pitchbend = -0x2000; | |
1da177e4 LT |
110 | if (pitchbend > 0x1FFF) |
111 | pitchbend = 0x1FFF; | |
112 | ||
113 | segment = pitchbend / 0x1000; | |
114 | freq = opl3_note_table[idx+segment]; | |
115 | freq += ((opl3_note_table[idx+segment+1] - freq) * | |
116 | (pitchbend % 0x1000)) / 0x1000; | |
117 | } else { | |
118 | freq = opl3_note_table[idx]; | |
119 | } | |
120 | ||
121 | *fnum = (unsigned char) freq; | |
122 | *blocknum = ((freq >> 8) & OPL3_FNUM_HIGH_MASK) | | |
123 | ((block << 2) & OPL3_BLOCKNUM_MASK); | |
124 | } | |
125 | ||
126 | ||
127 | #ifdef DEBUG_ALLOC | |
5b1646a8 | 128 | static void debug_alloc(struct snd_opl3 *opl3, char *s, int voice) { |
1da177e4 LT |
129 | int i; |
130 | char *str = "x.24"; | |
131 | ||
45203832 | 132 | printk(KERN_DEBUG "time %.5i: %s [%.2i]: ", opl3->use_time, s, voice); |
1da177e4 LT |
133 | for (i = 0; i < opl3->max_voices; i++) |
134 | printk("%c", *(str + opl3->voices[i].state + 1)); | |
135 | printk("\n"); | |
136 | } | |
137 | #endif | |
138 | ||
139 | /* | |
140 | * Get a FM voice (channel) to play a note on. | |
141 | */ | |
5b1646a8 TI |
142 | static int opl3_get_voice(struct snd_opl3 *opl3, int instr_4op, |
143 | struct snd_midi_channel *chan) { | |
1da177e4 LT |
144 | int chan_4op_1; /* first voice for 4op instrument */ |
145 | int chan_4op_2; /* second voice for 4op instrument */ | |
146 | ||
5b1646a8 | 147 | struct snd_opl3_voice *vp, *vp2; |
1da177e4 LT |
148 | unsigned int voice_time; |
149 | int i; | |
150 | ||
151 | #ifdef DEBUG_ALLOC | |
152 | char *alloc_type[3] = { "FREE ", "CHEAP ", "EXPENSIVE" }; | |
153 | #endif | |
154 | ||
155 | /* This is our "allocation cost" table */ | |
156 | enum { | |
157 | FREE = 0, CHEAP, EXPENSIVE, END | |
158 | }; | |
159 | ||
160 | /* Keeps track of what we are finding */ | |
161 | struct best { | |
162 | unsigned int time; | |
163 | int voice; | |
164 | } best[END]; | |
165 | struct best *bp; | |
166 | ||
167 | for (i = 0; i < END; i++) { | |
395d9dd5 | 168 | best[i].time = (unsigned int)(-1); /* XXX MAX_?INT really */ |
1da177e4 LT |
169 | best[i].voice = -1; |
170 | } | |
171 | ||
172 | /* Look through all the channels for the most suitable. */ | |
173 | for (i = 0; i < opl3->max_voices; i++) { | |
174 | vp = &opl3->voices[i]; | |
175 | ||
176 | if (vp->state == SNDRV_OPL3_ST_NOT_AVAIL) | |
177 | /* skip unavailable channels, allocated by | |
178 | drum voices or by bounded 4op voices) */ | |
179 | continue; | |
180 | ||
181 | voice_time = vp->time; | |
182 | bp = best; | |
183 | ||
184 | chan_4op_1 = ((i < 3) || (i > 8 && i < 12)); | |
185 | chan_4op_2 = ((i > 2 && i < 6) || (i > 11 && i < 15)); | |
186 | if (instr_4op) { | |
187 | /* allocate 4op voice */ | |
188 | /* skip channels unavailable to 4op instrument */ | |
189 | if (!chan_4op_1) | |
190 | continue; | |
191 | ||
192 | if (vp->state) | |
193 | /* kill one voice, CHEAP */ | |
194 | bp++; | |
195 | /* get state of bounded 2op channel | |
196 | to be allocated for 4op instrument */ | |
197 | vp2 = &opl3->voices[i + 3]; | |
198 | if (vp2->state == SNDRV_OPL3_ST_ON_2OP) { | |
199 | /* kill two voices, EXPENSIVE */ | |
200 | bp++; | |
201 | voice_time = (voice_time > vp->time) ? | |
202 | voice_time : vp->time; | |
203 | } | |
204 | } else { | |
205 | /* allocate 2op voice */ | |
206 | if ((chan_4op_1) || (chan_4op_2)) | |
207 | /* use bounded channels for 2op, CHEAP */ | |
208 | bp++; | |
209 | else if (vp->state) | |
210 | /* kill one voice on 2op channel, CHEAP */ | |
211 | bp++; | |
212 | /* raise kill cost to EXPENSIVE for all channels */ | |
213 | if (vp->state) | |
214 | bp++; | |
215 | } | |
216 | if (voice_time < bp->time) { | |
217 | bp->time = voice_time; | |
218 | bp->voice = i; | |
219 | } | |
220 | } | |
221 | ||
222 | for (i = 0; i < END; i++) { | |
223 | if (best[i].voice >= 0) { | |
224 | #ifdef DEBUG_ALLOC | |
45203832 | 225 | printk(KERN_DEBUG "%s %iop allocation on voice %i\n", |
1da177e4 LT |
226 | alloc_type[i], instr_4op ? 4 : 2, |
227 | best[i].voice); | |
228 | #endif | |
229 | return best[i].voice; | |
230 | } | |
231 | } | |
232 | /* not found */ | |
233 | return -1; | |
234 | } | |
235 | ||
236 | /* ------------------------------ */ | |
237 | ||
238 | /* | |
239 | * System timer interrupt function | |
240 | */ | |
241 | void snd_opl3_timer_func(unsigned long data) | |
242 | { | |
243 | ||
5b1646a8 | 244 | struct snd_opl3 *opl3 = (struct snd_opl3 *)data; |
b32425ac | 245 | unsigned long flags; |
1da177e4 LT |
246 | int again = 0; |
247 | int i; | |
248 | ||
8dce39b8 | 249 | spin_lock_irqsave(&opl3->voice_lock, flags); |
1da177e4 | 250 | for (i = 0; i < opl3->max_voices; i++) { |
5b1646a8 | 251 | struct snd_opl3_voice *vp = &opl3->voices[i]; |
1da177e4 LT |
252 | if (vp->state > 0 && vp->note_off_check) { |
253 | if (vp->note_off == jiffies) | |
8dce39b8 KH |
254 | snd_opl3_note_off_unsafe(opl3, vp->note, 0, |
255 | vp->chan); | |
1da177e4 LT |
256 | else |
257 | again++; | |
258 | } | |
259 | } | |
8dce39b8 KH |
260 | spin_unlock_irqrestore(&opl3->voice_lock, flags); |
261 | ||
262 | spin_lock_irqsave(&opl3->sys_timer_lock, flags); | |
f5d5f75f TI |
263 | if (again) |
264 | mod_timer(&opl3->tlist, jiffies + 1); /* invoke again */ | |
265 | else | |
1da177e4 | 266 | opl3->sys_timer_status = 0; |
b32425ac | 267 | spin_unlock_irqrestore(&opl3->sys_timer_lock, flags); |
1da177e4 LT |
268 | } |
269 | ||
270 | /* | |
271 | * Start system timer | |
272 | */ | |
5b1646a8 | 273 | static void snd_opl3_start_timer(struct snd_opl3 *opl3) |
1da177e4 LT |
274 | { |
275 | unsigned long flags; | |
276 | spin_lock_irqsave(&opl3->sys_timer_lock, flags); | |
277 | if (! opl3->sys_timer_status) { | |
f5d5f75f | 278 | mod_timer(&opl3->tlist, jiffies + 1); |
1da177e4 LT |
279 | opl3->sys_timer_status = 1; |
280 | } | |
281 | spin_unlock_irqrestore(&opl3->sys_timer_lock, flags); | |
282 | } | |
283 | ||
284 | /* ------------------------------ */ | |
285 | ||
286 | ||
287 | static int snd_opl3_oss_map[MAX_OPL3_VOICES] = { | |
288 | 0, 1, 2, 9, 10, 11, 6, 7, 8, 15, 16, 17, 3, 4 ,5, 12, 13, 14 | |
289 | }; | |
290 | ||
291 | /* | |
292 | * Start a note. | |
293 | */ | |
5b1646a8 | 294 | void snd_opl3_note_on(void *p, int note, int vel, struct snd_midi_channel *chan) |
1da177e4 | 295 | { |
5b1646a8 | 296 | struct snd_opl3 *opl3; |
1da177e4 LT |
297 | int instr_4op; |
298 | ||
299 | int voice; | |
5b1646a8 | 300 | struct snd_opl3_voice *vp, *vp2; |
1da177e4 LT |
301 | unsigned short connect_mask; |
302 | unsigned char connection; | |
303 | unsigned char vol_op[4]; | |
304 | ||
305 | int extra_prg = 0; | |
306 | ||
307 | unsigned short reg_side; | |
308 | unsigned char op_offset; | |
309 | unsigned char voice_offset; | |
310 | unsigned short opl3_reg; | |
311 | unsigned char reg_val; | |
224a0332 | 312 | unsigned char prg, bank; |
1da177e4 LT |
313 | |
314 | int key = note; | |
315 | unsigned char fnum, blocknum; | |
316 | int i; | |
317 | ||
224a0332 | 318 | struct fm_patch *patch; |
5b1646a8 | 319 | struct fm_instrument *fm; |
1da177e4 LT |
320 | unsigned long flags; |
321 | ||
322 | opl3 = p; | |
323 | ||
324 | #ifdef DEBUG_MIDI | |
45203832 | 325 | snd_printk(KERN_DEBUG "Note on, ch %i, inst %i, note %i, vel %i\n", |
1da177e4 LT |
326 | chan->number, chan->midi_program, note, vel); |
327 | #endif | |
1da177e4 LT |
328 | |
329 | /* in SYNTH mode, application takes care of voices */ | |
330 | /* in SEQ mode, drum voice numbers are notes on drum channel */ | |
331 | if (opl3->synth_mode == SNDRV_OPL3_MODE_SEQ) { | |
332 | if (chan->drum_channel) { | |
333 | /* percussion instruments are located in bank 128 */ | |
224a0332 TI |
334 | bank = 128; |
335 | prg = note; | |
1da177e4 | 336 | } else { |
224a0332 TI |
337 | bank = chan->gm_bank_select; |
338 | prg = chan->midi_program; | |
1da177e4 LT |
339 | } |
340 | } else { | |
341 | /* Prepare for OSS mode */ | |
342 | if (chan->number >= MAX_OPL3_VOICES) | |
343 | return; | |
344 | ||
345 | /* OSS instruments are located in bank 127 */ | |
224a0332 TI |
346 | bank = 127; |
347 | prg = chan->midi_program; | |
1da177e4 LT |
348 | } |
349 | ||
350 | spin_lock_irqsave(&opl3->voice_lock, flags); | |
351 | ||
352 | if (use_internal_drums) { | |
353 | snd_opl3_drum_switch(opl3, note, vel, 1, chan); | |
354 | spin_unlock_irqrestore(&opl3->voice_lock, flags); | |
355 | return; | |
356 | } | |
357 | ||
358 | __extra_prg: | |
224a0332 TI |
359 | patch = snd_opl3_find_patch(opl3, prg, bank, 0); |
360 | if (!patch) { | |
1da177e4 LT |
361 | spin_unlock_irqrestore(&opl3->voice_lock, flags); |
362 | return; | |
363 | } | |
364 | ||
224a0332 TI |
365 | fm = &patch->inst; |
366 | switch (patch->type) { | |
1da177e4 LT |
367 | case FM_PATCH_OPL2: |
368 | instr_4op = 0; | |
369 | break; | |
370 | case FM_PATCH_OPL3: | |
371 | if (opl3->hardware >= OPL3_HW_OPL3) { | |
372 | instr_4op = 1; | |
373 | break; | |
374 | } | |
375 | default: | |
1da177e4 LT |
376 | spin_unlock_irqrestore(&opl3->voice_lock, flags); |
377 | return; | |
378 | } | |
1da177e4 | 379 | #ifdef DEBUG_MIDI |
45203832 | 380 | snd_printk(KERN_DEBUG " --> OPL%i instrument: %s\n", |
224a0332 | 381 | instr_4op ? 3 : 2, patch->name); |
1da177e4 LT |
382 | #endif |
383 | /* in SYNTH mode, application takes care of voices */ | |
384 | /* in SEQ mode, allocate voice on free OPL3 channel */ | |
385 | if (opl3->synth_mode == SNDRV_OPL3_MODE_SEQ) { | |
386 | voice = opl3_get_voice(opl3, instr_4op, chan); | |
387 | } else { | |
388 | /* remap OSS voice */ | |
389 | voice = snd_opl3_oss_map[chan->number]; | |
390 | } | |
391 | ||
a8d09e3a TI |
392 | if (voice < 0) { |
393 | spin_unlock_irqrestore(&opl3->voice_lock, flags); | |
394 | return; | |
395 | } | |
396 | ||
1da177e4 LT |
397 | if (voice < MAX_OPL2_VOICES) { |
398 | /* Left register block for voices 0 .. 8 */ | |
399 | reg_side = OPL3_LEFT; | |
400 | voice_offset = voice; | |
401 | connect_mask = (OPL3_LEFT_4OP_0 << voice_offset) & 0x07; | |
402 | } else { | |
403 | /* Right register block for voices 9 .. 17 */ | |
404 | reg_side = OPL3_RIGHT; | |
405 | voice_offset = voice - MAX_OPL2_VOICES; | |
406 | connect_mask = (OPL3_RIGHT_4OP_0 << voice_offset) & 0x38; | |
407 | } | |
408 | ||
409 | /* kill voice on channel */ | |
410 | vp = &opl3->voices[voice]; | |
411 | if (vp->state > 0) { | |
412 | opl3_reg = reg_side | (OPL3_REG_KEYON_BLOCK + voice_offset); | |
413 | reg_val = vp->keyon_reg & ~OPL3_KEYON_BIT; | |
414 | opl3->command(opl3, opl3_reg, reg_val); | |
415 | } | |
416 | if (instr_4op) { | |
417 | vp2 = &opl3->voices[voice + 3]; | |
418 | if (vp->state > 0) { | |
419 | opl3_reg = reg_side | (OPL3_REG_KEYON_BLOCK + | |
420 | voice_offset + 3); | |
421 | reg_val = vp->keyon_reg & ~OPL3_KEYON_BIT; | |
422 | opl3->command(opl3, opl3_reg, reg_val); | |
423 | } | |
424 | } | |
425 | ||
426 | /* set connection register */ | |
427 | if (instr_4op) { | |
428 | if ((opl3->connection_reg ^ connect_mask) & connect_mask) { | |
429 | opl3->connection_reg |= connect_mask; | |
430 | /* set connection bit */ | |
431 | opl3_reg = OPL3_RIGHT | OPL3_REG_CONNECTION_SELECT; | |
432 | opl3->command(opl3, opl3_reg, opl3->connection_reg); | |
433 | } | |
434 | } else { | |
435 | if ((opl3->connection_reg ^ ~connect_mask) & connect_mask) { | |
436 | opl3->connection_reg &= ~connect_mask; | |
437 | /* clear connection bit */ | |
438 | opl3_reg = OPL3_RIGHT | OPL3_REG_CONNECTION_SELECT; | |
439 | opl3->command(opl3, opl3_reg, opl3->connection_reg); | |
440 | } | |
441 | } | |
442 | ||
443 | #ifdef DEBUG_MIDI | |
45203832 | 444 | snd_printk(KERN_DEBUG " --> setting OPL3 connection: 0x%x\n", |
1da177e4 LT |
445 | opl3->connection_reg); |
446 | #endif | |
447 | /* | |
448 | * calculate volume depending on connection | |
449 | * between FM operators (see include/opl3.h) | |
450 | */ | |
451 | for (i = 0; i < (instr_4op ? 4 : 2); i++) | |
452 | vol_op[i] = fm->op[i].ksl_level; | |
453 | ||
454 | connection = fm->feedback_connection[0] & 0x01; | |
455 | if (instr_4op) { | |
456 | connection <<= 1; | |
457 | connection |= fm->feedback_connection[1] & 0x01; | |
458 | ||
459 | snd_opl3_calc_volume(&vol_op[3], vel, chan); | |
460 | switch (connection) { | |
461 | case 0x03: | |
462 | snd_opl3_calc_volume(&vol_op[2], vel, chan); | |
463 | /* fallthru */ | |
464 | case 0x02: | |
465 | snd_opl3_calc_volume(&vol_op[0], vel, chan); | |
466 | break; | |
467 | case 0x01: | |
468 | snd_opl3_calc_volume(&vol_op[1], vel, chan); | |
469 | } | |
470 | } else { | |
471 | snd_opl3_calc_volume(&vol_op[1], vel, chan); | |
472 | if (connection) | |
473 | snd_opl3_calc_volume(&vol_op[0], vel, chan); | |
474 | } | |
475 | ||
476 | /* Program the FM voice characteristics */ | |
477 | for (i = 0; i < (instr_4op ? 4 : 2); i++) { | |
478 | #ifdef DEBUG_MIDI | |
45203832 | 479 | snd_printk(KERN_DEBUG " --> programming operator %i\n", i); |
1da177e4 LT |
480 | #endif |
481 | op_offset = snd_opl3_regmap[voice_offset][i]; | |
482 | ||
483 | /* Set OPL3 AM_VIB register of requested voice/operator */ | |
484 | reg_val = fm->op[i].am_vib; | |
485 | opl3_reg = reg_side | (OPL3_REG_AM_VIB + op_offset); | |
486 | opl3->command(opl3, opl3_reg, reg_val); | |
487 | ||
488 | /* Set OPL3 KSL_LEVEL register of requested voice/operator */ | |
489 | reg_val = vol_op[i]; | |
490 | opl3_reg = reg_side | (OPL3_REG_KSL_LEVEL + op_offset); | |
491 | opl3->command(opl3, opl3_reg, reg_val); | |
492 | ||
493 | /* Set OPL3 ATTACK_DECAY register of requested voice/operator */ | |
494 | reg_val = fm->op[i].attack_decay; | |
495 | opl3_reg = reg_side | (OPL3_REG_ATTACK_DECAY + op_offset); | |
496 | opl3->command(opl3, opl3_reg, reg_val); | |
497 | ||
498 | /* Set OPL3 SUSTAIN_RELEASE register of requested voice/operator */ | |
499 | reg_val = fm->op[i].sustain_release; | |
500 | opl3_reg = reg_side | (OPL3_REG_SUSTAIN_RELEASE + op_offset); | |
501 | opl3->command(opl3, opl3_reg, reg_val); | |
502 | ||
503 | /* Select waveform */ | |
504 | reg_val = fm->op[i].wave_select; | |
505 | opl3_reg = reg_side | (OPL3_REG_WAVE_SELECT + op_offset); | |
506 | opl3->command(opl3, opl3_reg, reg_val); | |
507 | } | |
508 | ||
509 | /* Set operator feedback and 2op inter-operator connection */ | |
510 | reg_val = fm->feedback_connection[0]; | |
511 | /* Set output voice connection */ | |
512 | reg_val |= OPL3_STEREO_BITS; | |
513 | if (chan->gm_pan < 43) | |
514 | reg_val &= ~OPL3_VOICE_TO_RIGHT; | |
515 | if (chan->gm_pan > 85) | |
516 | reg_val &= ~OPL3_VOICE_TO_LEFT; | |
517 | opl3_reg = reg_side | (OPL3_REG_FEEDBACK_CONNECTION + voice_offset); | |
518 | opl3->command(opl3, opl3_reg, reg_val); | |
519 | ||
520 | if (instr_4op) { | |
521 | /* Set 4op inter-operator connection */ | |
522 | reg_val = fm->feedback_connection[1] & OPL3_CONNECTION_BIT; | |
523 | /* Set output voice connection */ | |
524 | reg_val |= OPL3_STEREO_BITS; | |
525 | if (chan->gm_pan < 43) | |
526 | reg_val &= ~OPL3_VOICE_TO_RIGHT; | |
527 | if (chan->gm_pan > 85) | |
528 | reg_val &= ~OPL3_VOICE_TO_LEFT; | |
529 | opl3_reg = reg_side | (OPL3_REG_FEEDBACK_CONNECTION + | |
530 | voice_offset + 3); | |
531 | opl3->command(opl3, opl3_reg, reg_val); | |
532 | } | |
533 | ||
534 | /* | |
535 | * Special treatment of percussion notes for fm: | |
536 | * Requested pitch is really program, and pitch for | |
537 | * device is whatever was specified in the patch library. | |
538 | */ | |
539 | if (fm->fix_key) | |
540 | note = fm->fix_key; | |
541 | /* | |
542 | * use transpose if defined in patch library | |
543 | */ | |
544 | if (fm->trnsps) | |
545 | note += (fm->trnsps - 64); | |
546 | ||
547 | snd_opl3_calc_pitch(&fnum, &blocknum, note, chan); | |
548 | ||
549 | /* Set OPL3 FNUM_LOW register of requested voice */ | |
550 | opl3_reg = reg_side | (OPL3_REG_FNUM_LOW + voice_offset); | |
551 | opl3->command(opl3, opl3_reg, fnum); | |
552 | ||
553 | opl3->voices[voice].keyon_reg = blocknum; | |
554 | ||
555 | /* Set output sound flag */ | |
556 | blocknum |= OPL3_KEYON_BIT; | |
557 | ||
558 | #ifdef DEBUG_MIDI | |
45203832 | 559 | snd_printk(KERN_DEBUG " --> trigger voice %i\n", voice); |
1da177e4 LT |
560 | #endif |
561 | /* Set OPL3 KEYON_BLOCK register of requested voice */ | |
562 | opl3_reg = reg_side | (OPL3_REG_KEYON_BLOCK + voice_offset); | |
563 | opl3->command(opl3, opl3_reg, blocknum); | |
564 | ||
565 | /* kill note after fixed duration (in centiseconds) */ | |
566 | if (fm->fix_dur) { | |
567 | opl3->voices[voice].note_off = jiffies + | |
568 | (fm->fix_dur * HZ) / 100; | |
569 | snd_opl3_start_timer(opl3); | |
570 | opl3->voices[voice].note_off_check = 1; | |
571 | } else | |
572 | opl3->voices[voice].note_off_check = 0; | |
573 | ||
574 | /* get extra pgm, but avoid possible loops */ | |
575 | extra_prg = (extra_prg) ? 0 : fm->modes; | |
576 | ||
1da177e4 LT |
577 | /* do the bookkeeping */ |
578 | vp->time = opl3->use_time++; | |
579 | vp->note = key; | |
580 | vp->chan = chan; | |
581 | ||
582 | if (instr_4op) { | |
583 | vp->state = SNDRV_OPL3_ST_ON_4OP; | |
584 | ||
585 | vp2 = &opl3->voices[voice + 3]; | |
586 | vp2->time = opl3->use_time++; | |
587 | vp2->note = key; | |
588 | vp2->chan = chan; | |
589 | vp2->state = SNDRV_OPL3_ST_NOT_AVAIL; | |
590 | } else { | |
591 | if (vp->state == SNDRV_OPL3_ST_ON_4OP) { | |
592 | /* 4op killed by 2op, release bounded voice */ | |
593 | vp2 = &opl3->voices[voice + 3]; | |
594 | vp2->time = opl3->use_time++; | |
595 | vp2->state = SNDRV_OPL3_ST_OFF; | |
596 | } | |
597 | vp->state = SNDRV_OPL3_ST_ON_2OP; | |
598 | } | |
599 | ||
600 | #ifdef DEBUG_ALLOC | |
601 | debug_alloc(opl3, "note on ", voice); | |
602 | #endif | |
603 | ||
604 | /* allocate extra program if specified in patch library */ | |
605 | if (extra_prg) { | |
606 | if (extra_prg > 128) { | |
224a0332 | 607 | bank = 128; |
1da177e4 | 608 | /* percussions start at 35 */ |
224a0332 | 609 | prg = extra_prg - 128 + 35 - 1; |
1da177e4 | 610 | } else { |
224a0332 TI |
611 | bank = 0; |
612 | prg = extra_prg - 1; | |
1da177e4 LT |
613 | } |
614 | #ifdef DEBUG_MIDI | |
45203832 | 615 | snd_printk(KERN_DEBUG " *** allocating extra program\n"); |
1da177e4 LT |
616 | #endif |
617 | goto __extra_prg; | |
618 | } | |
619 | spin_unlock_irqrestore(&opl3->voice_lock, flags); | |
620 | } | |
621 | ||
5b1646a8 | 622 | static void snd_opl3_kill_voice(struct snd_opl3 *opl3, int voice) |
1da177e4 LT |
623 | { |
624 | unsigned short reg_side; | |
625 | unsigned char voice_offset; | |
626 | unsigned short opl3_reg; | |
627 | ||
5b1646a8 | 628 | struct snd_opl3_voice *vp, *vp2; |
1da177e4 | 629 | |
5e246b85 TI |
630 | if (snd_BUG_ON(voice >= MAX_OPL3_VOICES)) |
631 | return; | |
1da177e4 LT |
632 | |
633 | vp = &opl3->voices[voice]; | |
634 | if (voice < MAX_OPL2_VOICES) { | |
635 | /* Left register block for voices 0 .. 8 */ | |
636 | reg_side = OPL3_LEFT; | |
637 | voice_offset = voice; | |
638 | } else { | |
639 | /* Right register block for voices 9 .. 17 */ | |
640 | reg_side = OPL3_RIGHT; | |
641 | voice_offset = voice - MAX_OPL2_VOICES; | |
642 | } | |
643 | ||
644 | /* kill voice */ | |
645 | #ifdef DEBUG_MIDI | |
45203832 | 646 | snd_printk(KERN_DEBUG " --> kill voice %i\n", voice); |
1da177e4 LT |
647 | #endif |
648 | opl3_reg = reg_side | (OPL3_REG_KEYON_BLOCK + voice_offset); | |
649 | /* clear Key ON bit */ | |
650 | opl3->command(opl3, opl3_reg, vp->keyon_reg); | |
651 | ||
652 | /* do the bookkeeping */ | |
653 | vp->time = opl3->use_time++; | |
654 | ||
655 | if (vp->state == SNDRV_OPL3_ST_ON_4OP) { | |
656 | vp2 = &opl3->voices[voice + 3]; | |
657 | ||
658 | vp2->time = opl3->use_time++; | |
659 | vp2->state = SNDRV_OPL3_ST_OFF; | |
660 | } | |
661 | vp->state = SNDRV_OPL3_ST_OFF; | |
662 | #ifdef DEBUG_ALLOC | |
663 | debug_alloc(opl3, "note off", voice); | |
664 | #endif | |
665 | ||
666 | } | |
667 | ||
668 | /* | |
669 | * Release a note in response to a midi note off. | |
670 | */ | |
8dce39b8 KH |
671 | static void snd_opl3_note_off_unsafe(void *p, int note, int vel, |
672 | struct snd_midi_channel *chan) | |
1da177e4 | 673 | { |
5b1646a8 | 674 | struct snd_opl3 *opl3; |
1da177e4 LT |
675 | |
676 | int voice; | |
5b1646a8 | 677 | struct snd_opl3_voice *vp; |
1da177e4 | 678 | |
1da177e4 LT |
679 | opl3 = p; |
680 | ||
681 | #ifdef DEBUG_MIDI | |
45203832 | 682 | snd_printk(KERN_DEBUG "Note off, ch %i, inst %i, note %i\n", |
1da177e4 LT |
683 | chan->number, chan->midi_program, note); |
684 | #endif | |
685 | ||
1da177e4 LT |
686 | if (opl3->synth_mode == SNDRV_OPL3_MODE_SEQ) { |
687 | if (chan->drum_channel && use_internal_drums) { | |
688 | snd_opl3_drum_switch(opl3, note, vel, 0, chan); | |
1da177e4 LT |
689 | return; |
690 | } | |
691 | /* this loop will hopefully kill all extra voices, because | |
692 | they are grouped by the same channel and note values */ | |
693 | for (voice = 0; voice < opl3->max_voices; voice++) { | |
694 | vp = &opl3->voices[voice]; | |
695 | if (vp->state > 0 && vp->chan == chan && vp->note == note) { | |
696 | snd_opl3_kill_voice(opl3, voice); | |
697 | } | |
698 | } | |
699 | } else { | |
700 | /* remap OSS voices */ | |
701 | if (chan->number < MAX_OPL3_VOICES) { | |
702 | voice = snd_opl3_oss_map[chan->number]; | |
703 | snd_opl3_kill_voice(opl3, voice); | |
704 | } | |
705 | } | |
8dce39b8 KH |
706 | } |
707 | ||
708 | void snd_opl3_note_off(void *p, int note, int vel, | |
709 | struct snd_midi_channel *chan) | |
710 | { | |
711 | struct snd_opl3 *opl3 = p; | |
712 | unsigned long flags; | |
713 | ||
714 | spin_lock_irqsave(&opl3->voice_lock, flags); | |
715 | snd_opl3_note_off_unsafe(p, note, vel, chan); | |
1da177e4 LT |
716 | spin_unlock_irqrestore(&opl3->voice_lock, flags); |
717 | } | |
718 | ||
719 | /* | |
720 | * key pressure change | |
721 | */ | |
5b1646a8 | 722 | void snd_opl3_key_press(void *p, int note, int vel, struct snd_midi_channel *chan) |
1da177e4 | 723 | { |
5b1646a8 | 724 | struct snd_opl3 *opl3; |
1da177e4 LT |
725 | |
726 | opl3 = p; | |
727 | #ifdef DEBUG_MIDI | |
45203832 | 728 | snd_printk(KERN_DEBUG "Key pressure, ch#: %i, inst#: %i\n", |
1da177e4 LT |
729 | chan->number, chan->midi_program); |
730 | #endif | |
731 | } | |
732 | ||
733 | /* | |
734 | * terminate note | |
735 | */ | |
5b1646a8 | 736 | void snd_opl3_terminate_note(void *p, int note, struct snd_midi_channel *chan) |
1da177e4 | 737 | { |
5b1646a8 | 738 | struct snd_opl3 *opl3; |
1da177e4 LT |
739 | |
740 | opl3 = p; | |
741 | #ifdef DEBUG_MIDI | |
45203832 | 742 | snd_printk(KERN_DEBUG "Terminate note, ch#: %i, inst#: %i\n", |
1da177e4 LT |
743 | chan->number, chan->midi_program); |
744 | #endif | |
745 | } | |
746 | ||
5b1646a8 | 747 | static void snd_opl3_update_pitch(struct snd_opl3 *opl3, int voice) |
1da177e4 LT |
748 | { |
749 | unsigned short reg_side; | |
750 | unsigned char voice_offset; | |
751 | unsigned short opl3_reg; | |
752 | ||
753 | unsigned char fnum, blocknum; | |
754 | ||
5b1646a8 | 755 | struct snd_opl3_voice *vp; |
1da177e4 | 756 | |
5e246b85 TI |
757 | if (snd_BUG_ON(voice >= MAX_OPL3_VOICES)) |
758 | return; | |
1da177e4 LT |
759 | |
760 | vp = &opl3->voices[voice]; | |
761 | if (vp->chan == NULL) | |
762 | return; /* not allocated? */ | |
763 | ||
764 | if (voice < MAX_OPL2_VOICES) { | |
765 | /* Left register block for voices 0 .. 8 */ | |
766 | reg_side = OPL3_LEFT; | |
767 | voice_offset = voice; | |
768 | } else { | |
769 | /* Right register block for voices 9 .. 17 */ | |
770 | reg_side = OPL3_RIGHT; | |
771 | voice_offset = voice - MAX_OPL2_VOICES; | |
772 | } | |
773 | ||
774 | snd_opl3_calc_pitch(&fnum, &blocknum, vp->note, vp->chan); | |
775 | ||
776 | /* Set OPL3 FNUM_LOW register of requested voice */ | |
777 | opl3_reg = reg_side | (OPL3_REG_FNUM_LOW + voice_offset); | |
778 | opl3->command(opl3, opl3_reg, fnum); | |
779 | ||
780 | vp->keyon_reg = blocknum; | |
781 | ||
782 | /* Set output sound flag */ | |
783 | blocknum |= OPL3_KEYON_BIT; | |
784 | ||
785 | /* Set OPL3 KEYON_BLOCK register of requested voice */ | |
786 | opl3_reg = reg_side | (OPL3_REG_KEYON_BLOCK + voice_offset); | |
787 | opl3->command(opl3, opl3_reg, blocknum); | |
788 | ||
789 | vp->time = opl3->use_time++; | |
790 | } | |
791 | ||
792 | /* | |
793 | * Update voice pitch controller | |
794 | */ | |
5b1646a8 | 795 | static void snd_opl3_pitch_ctrl(struct snd_opl3 *opl3, struct snd_midi_channel *chan) |
1da177e4 LT |
796 | { |
797 | int voice; | |
5b1646a8 | 798 | struct snd_opl3_voice *vp; |
1da177e4 LT |
799 | |
800 | unsigned long flags; | |
801 | ||
802 | spin_lock_irqsave(&opl3->voice_lock, flags); | |
803 | ||
804 | if (opl3->synth_mode == SNDRV_OPL3_MODE_SEQ) { | |
805 | for (voice = 0; voice < opl3->max_voices; voice++) { | |
806 | vp = &opl3->voices[voice]; | |
807 | if (vp->state > 0 && vp->chan == chan) { | |
808 | snd_opl3_update_pitch(opl3, voice); | |
809 | } | |
810 | } | |
811 | } else { | |
812 | /* remap OSS voices */ | |
813 | if (chan->number < MAX_OPL3_VOICES) { | |
814 | voice = snd_opl3_oss_map[chan->number]; | |
815 | snd_opl3_update_pitch(opl3, voice); | |
816 | } | |
817 | } | |
818 | spin_unlock_irqrestore(&opl3->voice_lock, flags); | |
819 | } | |
820 | ||
821 | /* | |
3a4fa0a2 | 822 | * Deal with a controller type event. This includes all types of |
1da177e4 LT |
823 | * control events, not just the midi controllers |
824 | */ | |
5b1646a8 | 825 | void snd_opl3_control(void *p, int type, struct snd_midi_channel *chan) |
1da177e4 | 826 | { |
5b1646a8 | 827 | struct snd_opl3 *opl3; |
1da177e4 LT |
828 | |
829 | opl3 = p; | |
830 | #ifdef DEBUG_MIDI | |
45203832 | 831 | snd_printk(KERN_DEBUG "Controller, TYPE = %i, ch#: %i, inst#: %i\n", |
1da177e4 LT |
832 | type, chan->number, chan->midi_program); |
833 | #endif | |
834 | ||
835 | switch (type) { | |
836 | case MIDI_CTL_MSB_MODWHEEL: | |
837 | if (chan->control[MIDI_CTL_MSB_MODWHEEL] > 63) | |
838 | opl3->drum_reg |= OPL3_VIBRATO_DEPTH; | |
839 | else | |
840 | opl3->drum_reg &= ~OPL3_VIBRATO_DEPTH; | |
841 | opl3->command(opl3, OPL3_LEFT | OPL3_REG_PERCUSSION, | |
842 | opl3->drum_reg); | |
843 | break; | |
844 | case MIDI_CTL_E2_TREMOLO_DEPTH: | |
845 | if (chan->control[MIDI_CTL_E2_TREMOLO_DEPTH] > 63) | |
846 | opl3->drum_reg |= OPL3_TREMOLO_DEPTH; | |
847 | else | |
848 | opl3->drum_reg &= ~OPL3_TREMOLO_DEPTH; | |
849 | opl3->command(opl3, OPL3_LEFT | OPL3_REG_PERCUSSION, | |
850 | opl3->drum_reg); | |
851 | break; | |
852 | case MIDI_CTL_PITCHBEND: | |
853 | snd_opl3_pitch_ctrl(opl3, chan); | |
854 | break; | |
855 | } | |
856 | } | |
857 | ||
858 | /* | |
859 | * NRPN events | |
860 | */ | |
5b1646a8 TI |
861 | void snd_opl3_nrpn(void *p, struct snd_midi_channel *chan, |
862 | struct snd_midi_channel_set *chset) | |
1da177e4 | 863 | { |
5b1646a8 | 864 | struct snd_opl3 *opl3; |
1da177e4 LT |
865 | |
866 | opl3 = p; | |
867 | #ifdef DEBUG_MIDI | |
45203832 | 868 | snd_printk(KERN_DEBUG "NRPN, ch#: %i, inst#: %i\n", |
1da177e4 LT |
869 | chan->number, chan->midi_program); |
870 | #endif | |
871 | } | |
872 | ||
873 | /* | |
874 | * receive sysex | |
875 | */ | |
876 | void snd_opl3_sysex(void *p, unsigned char *buf, int len, | |
5b1646a8 | 877 | int parsed, struct snd_midi_channel_set *chset) |
1da177e4 | 878 | { |
5b1646a8 | 879 | struct snd_opl3 *opl3; |
1da177e4 LT |
880 | |
881 | opl3 = p; | |
882 | #ifdef DEBUG_MIDI | |
45203832 | 883 | snd_printk(KERN_DEBUG "SYSEX\n"); |
1da177e4 LT |
884 | #endif |
885 | } |