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 | ||
108 | if (pitchbend > 0x1FFF) | |
109 | pitchbend = 0x1FFF; | |
110 | ||
111 | segment = pitchbend / 0x1000; | |
112 | freq = opl3_note_table[idx+segment]; | |
113 | freq += ((opl3_note_table[idx+segment+1] - freq) * | |
114 | (pitchbend % 0x1000)) / 0x1000; | |
115 | } else { | |
116 | freq = opl3_note_table[idx]; | |
117 | } | |
118 | ||
119 | *fnum = (unsigned char) freq; | |
120 | *blocknum = ((freq >> 8) & OPL3_FNUM_HIGH_MASK) | | |
121 | ((block << 2) & OPL3_BLOCKNUM_MASK); | |
122 | } | |
123 | ||
124 | ||
125 | #ifdef DEBUG_ALLOC | |
5b1646a8 | 126 | static void debug_alloc(struct snd_opl3 *opl3, char *s, int voice) { |
1da177e4 LT |
127 | int i; |
128 | char *str = "x.24"; | |
129 | ||
45203832 | 130 | printk(KERN_DEBUG "time %.5i: %s [%.2i]: ", opl3->use_time, s, voice); |
1da177e4 LT |
131 | for (i = 0; i < opl3->max_voices; i++) |
132 | printk("%c", *(str + opl3->voices[i].state + 1)); | |
133 | printk("\n"); | |
134 | } | |
135 | #endif | |
136 | ||
137 | /* | |
138 | * Get a FM voice (channel) to play a note on. | |
139 | */ | |
5b1646a8 TI |
140 | static int opl3_get_voice(struct snd_opl3 *opl3, int instr_4op, |
141 | struct snd_midi_channel *chan) { | |
1da177e4 LT |
142 | int chan_4op_1; /* first voice for 4op instrument */ |
143 | int chan_4op_2; /* second voice for 4op instrument */ | |
144 | ||
5b1646a8 | 145 | struct snd_opl3_voice *vp, *vp2; |
1da177e4 LT |
146 | unsigned int voice_time; |
147 | int i; | |
148 | ||
149 | #ifdef DEBUG_ALLOC | |
150 | char *alloc_type[3] = { "FREE ", "CHEAP ", "EXPENSIVE" }; | |
151 | #endif | |
152 | ||
153 | /* This is our "allocation cost" table */ | |
154 | enum { | |
155 | FREE = 0, CHEAP, EXPENSIVE, END | |
156 | }; | |
157 | ||
158 | /* Keeps track of what we are finding */ | |
159 | struct best { | |
160 | unsigned int time; | |
161 | int voice; | |
162 | } best[END]; | |
163 | struct best *bp; | |
164 | ||
165 | for (i = 0; i < END; i++) { | |
395d9dd5 | 166 | best[i].time = (unsigned int)(-1); /* XXX MAX_?INT really */ |
1da177e4 LT |
167 | best[i].voice = -1; |
168 | } | |
169 | ||
170 | /* Look through all the channels for the most suitable. */ | |
171 | for (i = 0; i < opl3->max_voices; i++) { | |
172 | vp = &opl3->voices[i]; | |
173 | ||
174 | if (vp->state == SNDRV_OPL3_ST_NOT_AVAIL) | |
175 | /* skip unavailable channels, allocated by | |
176 | drum voices or by bounded 4op voices) */ | |
177 | continue; | |
178 | ||
179 | voice_time = vp->time; | |
180 | bp = best; | |
181 | ||
182 | chan_4op_1 = ((i < 3) || (i > 8 && i < 12)); | |
183 | chan_4op_2 = ((i > 2 && i < 6) || (i > 11 && i < 15)); | |
184 | if (instr_4op) { | |
185 | /* allocate 4op voice */ | |
186 | /* skip channels unavailable to 4op instrument */ | |
187 | if (!chan_4op_1) | |
188 | continue; | |
189 | ||
190 | if (vp->state) | |
191 | /* kill one voice, CHEAP */ | |
192 | bp++; | |
193 | /* get state of bounded 2op channel | |
194 | to be allocated for 4op instrument */ | |
195 | vp2 = &opl3->voices[i + 3]; | |
196 | if (vp2->state == SNDRV_OPL3_ST_ON_2OP) { | |
197 | /* kill two voices, EXPENSIVE */ | |
198 | bp++; | |
199 | voice_time = (voice_time > vp->time) ? | |
200 | voice_time : vp->time; | |
201 | } | |
202 | } else { | |
203 | /* allocate 2op voice */ | |
204 | if ((chan_4op_1) || (chan_4op_2)) | |
205 | /* use bounded channels for 2op, CHEAP */ | |
206 | bp++; | |
207 | else if (vp->state) | |
208 | /* kill one voice on 2op channel, CHEAP */ | |
209 | bp++; | |
210 | /* raise kill cost to EXPENSIVE for all channels */ | |
211 | if (vp->state) | |
212 | bp++; | |
213 | } | |
214 | if (voice_time < bp->time) { | |
215 | bp->time = voice_time; | |
216 | bp->voice = i; | |
217 | } | |
218 | } | |
219 | ||
220 | for (i = 0; i < END; i++) { | |
221 | if (best[i].voice >= 0) { | |
222 | #ifdef DEBUG_ALLOC | |
45203832 | 223 | printk(KERN_DEBUG "%s %iop allocation on voice %i\n", |
1da177e4 LT |
224 | alloc_type[i], instr_4op ? 4 : 2, |
225 | best[i].voice); | |
226 | #endif | |
227 | return best[i].voice; | |
228 | } | |
229 | } | |
230 | /* not found */ | |
231 | return -1; | |
232 | } | |
233 | ||
234 | /* ------------------------------ */ | |
235 | ||
236 | /* | |
237 | * System timer interrupt function | |
238 | */ | |
239 | void snd_opl3_timer_func(unsigned long data) | |
240 | { | |
241 | ||
5b1646a8 | 242 | struct snd_opl3 *opl3 = (struct snd_opl3 *)data; |
b32425ac | 243 | unsigned long flags; |
1da177e4 LT |
244 | int again = 0; |
245 | int i; | |
246 | ||
8dce39b8 | 247 | spin_lock_irqsave(&opl3->voice_lock, flags); |
1da177e4 | 248 | for (i = 0; i < opl3->max_voices; i++) { |
5b1646a8 | 249 | struct snd_opl3_voice *vp = &opl3->voices[i]; |
1da177e4 LT |
250 | if (vp->state > 0 && vp->note_off_check) { |
251 | if (vp->note_off == jiffies) | |
8dce39b8 KH |
252 | snd_opl3_note_off_unsafe(opl3, vp->note, 0, |
253 | vp->chan); | |
1da177e4 LT |
254 | else |
255 | again++; | |
256 | } | |
257 | } | |
8dce39b8 KH |
258 | spin_unlock_irqrestore(&opl3->voice_lock, flags); |
259 | ||
260 | spin_lock_irqsave(&opl3->sys_timer_lock, flags); | |
1da177e4 LT |
261 | if (again) { |
262 | opl3->tlist.expires = jiffies + 1; /* invoke again */ | |
263 | add_timer(&opl3->tlist); | |
264 | } else { | |
265 | opl3->sys_timer_status = 0; | |
266 | } | |
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) { | |
278 | opl3->tlist.expires = jiffies + 1; | |
279 | add_timer(&opl3->tlist); | |
280 | opl3->sys_timer_status = 1; | |
281 | } | |
282 | spin_unlock_irqrestore(&opl3->sys_timer_lock, flags); | |
283 | } | |
284 | ||
285 | /* ------------------------------ */ | |
286 | ||
287 | ||
288 | static int snd_opl3_oss_map[MAX_OPL3_VOICES] = { | |
289 | 0, 1, 2, 9, 10, 11, 6, 7, 8, 15, 16, 17, 3, 4 ,5, 12, 13, 14 | |
290 | }; | |
291 | ||
292 | /* | |
293 | * Start a note. | |
294 | */ | |
5b1646a8 | 295 | void snd_opl3_note_on(void *p, int note, int vel, struct snd_midi_channel *chan) |
1da177e4 | 296 | { |
5b1646a8 | 297 | struct snd_opl3 *opl3; |
1da177e4 LT |
298 | int instr_4op; |
299 | ||
300 | int voice; | |
5b1646a8 | 301 | struct snd_opl3_voice *vp, *vp2; |
1da177e4 LT |
302 | unsigned short connect_mask; |
303 | unsigned char connection; | |
304 | unsigned char vol_op[4]; | |
305 | ||
306 | int extra_prg = 0; | |
307 | ||
308 | unsigned short reg_side; | |
309 | unsigned char op_offset; | |
310 | unsigned char voice_offset; | |
311 | unsigned short opl3_reg; | |
312 | unsigned char reg_val; | |
224a0332 | 313 | unsigned char prg, bank; |
1da177e4 LT |
314 | |
315 | int key = note; | |
316 | unsigned char fnum, blocknum; | |
317 | int i; | |
318 | ||
224a0332 | 319 | struct fm_patch *patch; |
5b1646a8 | 320 | struct fm_instrument *fm; |
1da177e4 LT |
321 | unsigned long flags; |
322 | ||
323 | opl3 = p; | |
324 | ||
325 | #ifdef DEBUG_MIDI | |
45203832 | 326 | snd_printk(KERN_DEBUG "Note on, ch %i, inst %i, note %i, vel %i\n", |
1da177e4 LT |
327 | chan->number, chan->midi_program, note, vel); |
328 | #endif | |
1da177e4 LT |
329 | |
330 | /* in SYNTH mode, application takes care of voices */ | |
331 | /* in SEQ mode, drum voice numbers are notes on drum channel */ | |
332 | if (opl3->synth_mode == SNDRV_OPL3_MODE_SEQ) { | |
333 | if (chan->drum_channel) { | |
334 | /* percussion instruments are located in bank 128 */ | |
224a0332 TI |
335 | bank = 128; |
336 | prg = note; | |
1da177e4 | 337 | } else { |
224a0332 TI |
338 | bank = chan->gm_bank_select; |
339 | prg = chan->midi_program; | |
1da177e4 LT |
340 | } |
341 | } else { | |
342 | /* Prepare for OSS mode */ | |
343 | if (chan->number >= MAX_OPL3_VOICES) | |
344 | return; | |
345 | ||
346 | /* OSS instruments are located in bank 127 */ | |
224a0332 TI |
347 | bank = 127; |
348 | prg = chan->midi_program; | |
1da177e4 LT |
349 | } |
350 | ||
351 | spin_lock_irqsave(&opl3->voice_lock, flags); | |
352 | ||
353 | if (use_internal_drums) { | |
354 | snd_opl3_drum_switch(opl3, note, vel, 1, chan); | |
355 | spin_unlock_irqrestore(&opl3->voice_lock, flags); | |
356 | return; | |
357 | } | |
358 | ||
359 | __extra_prg: | |
224a0332 TI |
360 | patch = snd_opl3_find_patch(opl3, prg, bank, 0); |
361 | if (!patch) { | |
1da177e4 LT |
362 | spin_unlock_irqrestore(&opl3->voice_lock, flags); |
363 | return; | |
364 | } | |
365 | ||
224a0332 TI |
366 | fm = &patch->inst; |
367 | switch (patch->type) { | |
1da177e4 LT |
368 | case FM_PATCH_OPL2: |
369 | instr_4op = 0; | |
370 | break; | |
371 | case FM_PATCH_OPL3: | |
372 | if (opl3->hardware >= OPL3_HW_OPL3) { | |
373 | instr_4op = 1; | |
374 | break; | |
375 | } | |
376 | default: | |
1da177e4 LT |
377 | spin_unlock_irqrestore(&opl3->voice_lock, flags); |
378 | return; | |
379 | } | |
1da177e4 | 380 | #ifdef DEBUG_MIDI |
45203832 | 381 | snd_printk(KERN_DEBUG " --> OPL%i instrument: %s\n", |
224a0332 | 382 | instr_4op ? 3 : 2, patch->name); |
1da177e4 LT |
383 | #endif |
384 | /* in SYNTH mode, application takes care of voices */ | |
385 | /* in SEQ mode, allocate voice on free OPL3 channel */ | |
386 | if (opl3->synth_mode == SNDRV_OPL3_MODE_SEQ) { | |
387 | voice = opl3_get_voice(opl3, instr_4op, chan); | |
388 | } else { | |
389 | /* remap OSS voice */ | |
390 | voice = snd_opl3_oss_map[chan->number]; | |
391 | } | |
392 | ||
a8d09e3a TI |
393 | if (voice < 0) { |
394 | spin_unlock_irqrestore(&opl3->voice_lock, flags); | |
395 | return; | |
396 | } | |
397 | ||
1da177e4 LT |
398 | if (voice < MAX_OPL2_VOICES) { |
399 | /* Left register block for voices 0 .. 8 */ | |
400 | reg_side = OPL3_LEFT; | |
401 | voice_offset = voice; | |
402 | connect_mask = (OPL3_LEFT_4OP_0 << voice_offset) & 0x07; | |
403 | } else { | |
404 | /* Right register block for voices 9 .. 17 */ | |
405 | reg_side = OPL3_RIGHT; | |
406 | voice_offset = voice - MAX_OPL2_VOICES; | |
407 | connect_mask = (OPL3_RIGHT_4OP_0 << voice_offset) & 0x38; | |
408 | } | |
409 | ||
410 | /* kill voice on channel */ | |
411 | vp = &opl3->voices[voice]; | |
412 | if (vp->state > 0) { | |
413 | opl3_reg = reg_side | (OPL3_REG_KEYON_BLOCK + voice_offset); | |
414 | reg_val = vp->keyon_reg & ~OPL3_KEYON_BIT; | |
415 | opl3->command(opl3, opl3_reg, reg_val); | |
416 | } | |
417 | if (instr_4op) { | |
418 | vp2 = &opl3->voices[voice + 3]; | |
419 | if (vp->state > 0) { | |
420 | opl3_reg = reg_side | (OPL3_REG_KEYON_BLOCK + | |
421 | voice_offset + 3); | |
422 | reg_val = vp->keyon_reg & ~OPL3_KEYON_BIT; | |
423 | opl3->command(opl3, opl3_reg, reg_val); | |
424 | } | |
425 | } | |
426 | ||
427 | /* set connection register */ | |
428 | if (instr_4op) { | |
429 | if ((opl3->connection_reg ^ connect_mask) & connect_mask) { | |
430 | opl3->connection_reg |= connect_mask; | |
431 | /* set connection bit */ | |
432 | opl3_reg = OPL3_RIGHT | OPL3_REG_CONNECTION_SELECT; | |
433 | opl3->command(opl3, opl3_reg, opl3->connection_reg); | |
434 | } | |
435 | } else { | |
436 | if ((opl3->connection_reg ^ ~connect_mask) & connect_mask) { | |
437 | opl3->connection_reg &= ~connect_mask; | |
438 | /* clear connection bit */ | |
439 | opl3_reg = OPL3_RIGHT | OPL3_REG_CONNECTION_SELECT; | |
440 | opl3->command(opl3, opl3_reg, opl3->connection_reg); | |
441 | } | |
442 | } | |
443 | ||
444 | #ifdef DEBUG_MIDI | |
45203832 | 445 | snd_printk(KERN_DEBUG " --> setting OPL3 connection: 0x%x\n", |
1da177e4 LT |
446 | opl3->connection_reg); |
447 | #endif | |
448 | /* | |
449 | * calculate volume depending on connection | |
450 | * between FM operators (see include/opl3.h) | |
451 | */ | |
452 | for (i = 0; i < (instr_4op ? 4 : 2); i++) | |
453 | vol_op[i] = fm->op[i].ksl_level; | |
454 | ||
455 | connection = fm->feedback_connection[0] & 0x01; | |
456 | if (instr_4op) { | |
457 | connection <<= 1; | |
458 | connection |= fm->feedback_connection[1] & 0x01; | |
459 | ||
460 | snd_opl3_calc_volume(&vol_op[3], vel, chan); | |
461 | switch (connection) { | |
462 | case 0x03: | |
463 | snd_opl3_calc_volume(&vol_op[2], vel, chan); | |
464 | /* fallthru */ | |
465 | case 0x02: | |
466 | snd_opl3_calc_volume(&vol_op[0], vel, chan); | |
467 | break; | |
468 | case 0x01: | |
469 | snd_opl3_calc_volume(&vol_op[1], vel, chan); | |
470 | } | |
471 | } else { | |
472 | snd_opl3_calc_volume(&vol_op[1], vel, chan); | |
473 | if (connection) | |
474 | snd_opl3_calc_volume(&vol_op[0], vel, chan); | |
475 | } | |
476 | ||
477 | /* Program the FM voice characteristics */ | |
478 | for (i = 0; i < (instr_4op ? 4 : 2); i++) { | |
479 | #ifdef DEBUG_MIDI | |
45203832 | 480 | snd_printk(KERN_DEBUG " --> programming operator %i\n", i); |
1da177e4 LT |
481 | #endif |
482 | op_offset = snd_opl3_regmap[voice_offset][i]; | |
483 | ||
484 | /* Set OPL3 AM_VIB register of requested voice/operator */ | |
485 | reg_val = fm->op[i].am_vib; | |
486 | opl3_reg = reg_side | (OPL3_REG_AM_VIB + op_offset); | |
487 | opl3->command(opl3, opl3_reg, reg_val); | |
488 | ||
489 | /* Set OPL3 KSL_LEVEL register of requested voice/operator */ | |
490 | reg_val = vol_op[i]; | |
491 | opl3_reg = reg_side | (OPL3_REG_KSL_LEVEL + op_offset); | |
492 | opl3->command(opl3, opl3_reg, reg_val); | |
493 | ||
494 | /* Set OPL3 ATTACK_DECAY register of requested voice/operator */ | |
495 | reg_val = fm->op[i].attack_decay; | |
496 | opl3_reg = reg_side | (OPL3_REG_ATTACK_DECAY + op_offset); | |
497 | opl3->command(opl3, opl3_reg, reg_val); | |
498 | ||
499 | /* Set OPL3 SUSTAIN_RELEASE register of requested voice/operator */ | |
500 | reg_val = fm->op[i].sustain_release; | |
501 | opl3_reg = reg_side | (OPL3_REG_SUSTAIN_RELEASE + op_offset); | |
502 | opl3->command(opl3, opl3_reg, reg_val); | |
503 | ||
504 | /* Select waveform */ | |
505 | reg_val = fm->op[i].wave_select; | |
506 | opl3_reg = reg_side | (OPL3_REG_WAVE_SELECT + op_offset); | |
507 | opl3->command(opl3, opl3_reg, reg_val); | |
508 | } | |
509 | ||
510 | /* Set operator feedback and 2op inter-operator connection */ | |
511 | reg_val = fm->feedback_connection[0]; | |
512 | /* Set output voice connection */ | |
513 | reg_val |= OPL3_STEREO_BITS; | |
514 | if (chan->gm_pan < 43) | |
515 | reg_val &= ~OPL3_VOICE_TO_RIGHT; | |
516 | if (chan->gm_pan > 85) | |
517 | reg_val &= ~OPL3_VOICE_TO_LEFT; | |
518 | opl3_reg = reg_side | (OPL3_REG_FEEDBACK_CONNECTION + voice_offset); | |
519 | opl3->command(opl3, opl3_reg, reg_val); | |
520 | ||
521 | if (instr_4op) { | |
522 | /* Set 4op inter-operator connection */ | |
523 | reg_val = fm->feedback_connection[1] & OPL3_CONNECTION_BIT; | |
524 | /* Set output voice connection */ | |
525 | reg_val |= OPL3_STEREO_BITS; | |
526 | if (chan->gm_pan < 43) | |
527 | reg_val &= ~OPL3_VOICE_TO_RIGHT; | |
528 | if (chan->gm_pan > 85) | |
529 | reg_val &= ~OPL3_VOICE_TO_LEFT; | |
530 | opl3_reg = reg_side | (OPL3_REG_FEEDBACK_CONNECTION + | |
531 | voice_offset + 3); | |
532 | opl3->command(opl3, opl3_reg, reg_val); | |
533 | } | |
534 | ||
535 | /* | |
536 | * Special treatment of percussion notes for fm: | |
537 | * Requested pitch is really program, and pitch for | |
538 | * device is whatever was specified in the patch library. | |
539 | */ | |
540 | if (fm->fix_key) | |
541 | note = fm->fix_key; | |
542 | /* | |
543 | * use transpose if defined in patch library | |
544 | */ | |
545 | if (fm->trnsps) | |
546 | note += (fm->trnsps - 64); | |
547 | ||
548 | snd_opl3_calc_pitch(&fnum, &blocknum, note, chan); | |
549 | ||
550 | /* Set OPL3 FNUM_LOW register of requested voice */ | |
551 | opl3_reg = reg_side | (OPL3_REG_FNUM_LOW + voice_offset); | |
552 | opl3->command(opl3, opl3_reg, fnum); | |
553 | ||
554 | opl3->voices[voice].keyon_reg = blocknum; | |
555 | ||
556 | /* Set output sound flag */ | |
557 | blocknum |= OPL3_KEYON_BIT; | |
558 | ||
559 | #ifdef DEBUG_MIDI | |
45203832 | 560 | snd_printk(KERN_DEBUG " --> trigger voice %i\n", voice); |
1da177e4 LT |
561 | #endif |
562 | /* Set OPL3 KEYON_BLOCK register of requested voice */ | |
563 | opl3_reg = reg_side | (OPL3_REG_KEYON_BLOCK + voice_offset); | |
564 | opl3->command(opl3, opl3_reg, blocknum); | |
565 | ||
566 | /* kill note after fixed duration (in centiseconds) */ | |
567 | if (fm->fix_dur) { | |
568 | opl3->voices[voice].note_off = jiffies + | |
569 | (fm->fix_dur * HZ) / 100; | |
570 | snd_opl3_start_timer(opl3); | |
571 | opl3->voices[voice].note_off_check = 1; | |
572 | } else | |
573 | opl3->voices[voice].note_off_check = 0; | |
574 | ||
575 | /* get extra pgm, but avoid possible loops */ | |
576 | extra_prg = (extra_prg) ? 0 : fm->modes; | |
577 | ||
1da177e4 LT |
578 | /* do the bookkeeping */ |
579 | vp->time = opl3->use_time++; | |
580 | vp->note = key; | |
581 | vp->chan = chan; | |
582 | ||
583 | if (instr_4op) { | |
584 | vp->state = SNDRV_OPL3_ST_ON_4OP; | |
585 | ||
586 | vp2 = &opl3->voices[voice + 3]; | |
587 | vp2->time = opl3->use_time++; | |
588 | vp2->note = key; | |
589 | vp2->chan = chan; | |
590 | vp2->state = SNDRV_OPL3_ST_NOT_AVAIL; | |
591 | } else { | |
592 | if (vp->state == SNDRV_OPL3_ST_ON_4OP) { | |
593 | /* 4op killed by 2op, release bounded voice */ | |
594 | vp2 = &opl3->voices[voice + 3]; | |
595 | vp2->time = opl3->use_time++; | |
596 | vp2->state = SNDRV_OPL3_ST_OFF; | |
597 | } | |
598 | vp->state = SNDRV_OPL3_ST_ON_2OP; | |
599 | } | |
600 | ||
601 | #ifdef DEBUG_ALLOC | |
602 | debug_alloc(opl3, "note on ", voice); | |
603 | #endif | |
604 | ||
605 | /* allocate extra program if specified in patch library */ | |
606 | if (extra_prg) { | |
607 | if (extra_prg > 128) { | |
224a0332 | 608 | bank = 128; |
1da177e4 | 609 | /* percussions start at 35 */ |
224a0332 | 610 | prg = extra_prg - 128 + 35 - 1; |
1da177e4 | 611 | } else { |
224a0332 TI |
612 | bank = 0; |
613 | prg = extra_prg - 1; | |
1da177e4 LT |
614 | } |
615 | #ifdef DEBUG_MIDI | |
45203832 | 616 | snd_printk(KERN_DEBUG " *** allocating extra program\n"); |
1da177e4 LT |
617 | #endif |
618 | goto __extra_prg; | |
619 | } | |
620 | spin_unlock_irqrestore(&opl3->voice_lock, flags); | |
621 | } | |
622 | ||
5b1646a8 | 623 | static void snd_opl3_kill_voice(struct snd_opl3 *opl3, int voice) |
1da177e4 LT |
624 | { |
625 | unsigned short reg_side; | |
626 | unsigned char voice_offset; | |
627 | unsigned short opl3_reg; | |
628 | ||
5b1646a8 | 629 | struct snd_opl3_voice *vp, *vp2; |
1da177e4 | 630 | |
5e246b85 TI |
631 | if (snd_BUG_ON(voice >= MAX_OPL3_VOICES)) |
632 | return; | |
1da177e4 LT |
633 | |
634 | vp = &opl3->voices[voice]; | |
635 | if (voice < MAX_OPL2_VOICES) { | |
636 | /* Left register block for voices 0 .. 8 */ | |
637 | reg_side = OPL3_LEFT; | |
638 | voice_offset = voice; | |
639 | } else { | |
640 | /* Right register block for voices 9 .. 17 */ | |
641 | reg_side = OPL3_RIGHT; | |
642 | voice_offset = voice - MAX_OPL2_VOICES; | |
643 | } | |
644 | ||
645 | /* kill voice */ | |
646 | #ifdef DEBUG_MIDI | |
45203832 | 647 | snd_printk(KERN_DEBUG " --> kill voice %i\n", voice); |
1da177e4 LT |
648 | #endif |
649 | opl3_reg = reg_side | (OPL3_REG_KEYON_BLOCK + voice_offset); | |
650 | /* clear Key ON bit */ | |
651 | opl3->command(opl3, opl3_reg, vp->keyon_reg); | |
652 | ||
653 | /* do the bookkeeping */ | |
654 | vp->time = opl3->use_time++; | |
655 | ||
656 | if (vp->state == SNDRV_OPL3_ST_ON_4OP) { | |
657 | vp2 = &opl3->voices[voice + 3]; | |
658 | ||
659 | vp2->time = opl3->use_time++; | |
660 | vp2->state = SNDRV_OPL3_ST_OFF; | |
661 | } | |
662 | vp->state = SNDRV_OPL3_ST_OFF; | |
663 | #ifdef DEBUG_ALLOC | |
664 | debug_alloc(opl3, "note off", voice); | |
665 | #endif | |
666 | ||
667 | } | |
668 | ||
669 | /* | |
670 | * Release a note in response to a midi note off. | |
671 | */ | |
8dce39b8 KH |
672 | static void snd_opl3_note_off_unsafe(void *p, int note, int vel, |
673 | struct snd_midi_channel *chan) | |
1da177e4 | 674 | { |
5b1646a8 | 675 | struct snd_opl3 *opl3; |
1da177e4 LT |
676 | |
677 | int voice; | |
5b1646a8 | 678 | struct snd_opl3_voice *vp; |
1da177e4 | 679 | |
1da177e4 LT |
680 | opl3 = p; |
681 | ||
682 | #ifdef DEBUG_MIDI | |
45203832 | 683 | snd_printk(KERN_DEBUG "Note off, ch %i, inst %i, note %i\n", |
1da177e4 LT |
684 | chan->number, chan->midi_program, note); |
685 | #endif | |
686 | ||
1da177e4 LT |
687 | if (opl3->synth_mode == SNDRV_OPL3_MODE_SEQ) { |
688 | if (chan->drum_channel && use_internal_drums) { | |
689 | snd_opl3_drum_switch(opl3, note, vel, 0, chan); | |
1da177e4 LT |
690 | return; |
691 | } | |
692 | /* this loop will hopefully kill all extra voices, because | |
693 | they are grouped by the same channel and note values */ | |
694 | for (voice = 0; voice < opl3->max_voices; voice++) { | |
695 | vp = &opl3->voices[voice]; | |
696 | if (vp->state > 0 && vp->chan == chan && vp->note == note) { | |
697 | snd_opl3_kill_voice(opl3, voice); | |
698 | } | |
699 | } | |
700 | } else { | |
701 | /* remap OSS voices */ | |
702 | if (chan->number < MAX_OPL3_VOICES) { | |
703 | voice = snd_opl3_oss_map[chan->number]; | |
704 | snd_opl3_kill_voice(opl3, voice); | |
705 | } | |
706 | } | |
8dce39b8 KH |
707 | } |
708 | ||
709 | void snd_opl3_note_off(void *p, int note, int vel, | |
710 | struct snd_midi_channel *chan) | |
711 | { | |
712 | struct snd_opl3 *opl3 = p; | |
713 | unsigned long flags; | |
714 | ||
715 | spin_lock_irqsave(&opl3->voice_lock, flags); | |
716 | snd_opl3_note_off_unsafe(p, note, vel, chan); | |
1da177e4 LT |
717 | spin_unlock_irqrestore(&opl3->voice_lock, flags); |
718 | } | |
719 | ||
720 | /* | |
721 | * key pressure change | |
722 | */ | |
5b1646a8 | 723 | void snd_opl3_key_press(void *p, int note, int vel, struct snd_midi_channel *chan) |
1da177e4 | 724 | { |
5b1646a8 | 725 | struct snd_opl3 *opl3; |
1da177e4 LT |
726 | |
727 | opl3 = p; | |
728 | #ifdef DEBUG_MIDI | |
45203832 | 729 | snd_printk(KERN_DEBUG "Key pressure, ch#: %i, inst#: %i\n", |
1da177e4 LT |
730 | chan->number, chan->midi_program); |
731 | #endif | |
732 | } | |
733 | ||
734 | /* | |
735 | * terminate note | |
736 | */ | |
5b1646a8 | 737 | void snd_opl3_terminate_note(void *p, int note, struct snd_midi_channel *chan) |
1da177e4 | 738 | { |
5b1646a8 | 739 | struct snd_opl3 *opl3; |
1da177e4 LT |
740 | |
741 | opl3 = p; | |
742 | #ifdef DEBUG_MIDI | |
45203832 | 743 | snd_printk(KERN_DEBUG "Terminate note, ch#: %i, inst#: %i\n", |
1da177e4 LT |
744 | chan->number, chan->midi_program); |
745 | #endif | |
746 | } | |
747 | ||
5b1646a8 | 748 | static void snd_opl3_update_pitch(struct snd_opl3 *opl3, int voice) |
1da177e4 LT |
749 | { |
750 | unsigned short reg_side; | |
751 | unsigned char voice_offset; | |
752 | unsigned short opl3_reg; | |
753 | ||
754 | unsigned char fnum, blocknum; | |
755 | ||
5b1646a8 | 756 | struct snd_opl3_voice *vp; |
1da177e4 | 757 | |
5e246b85 TI |
758 | if (snd_BUG_ON(voice >= MAX_OPL3_VOICES)) |
759 | return; | |
1da177e4 LT |
760 | |
761 | vp = &opl3->voices[voice]; | |
762 | if (vp->chan == NULL) | |
763 | return; /* not allocated? */ | |
764 | ||
765 | if (voice < MAX_OPL2_VOICES) { | |
766 | /* Left register block for voices 0 .. 8 */ | |
767 | reg_side = OPL3_LEFT; | |
768 | voice_offset = voice; | |
769 | } else { | |
770 | /* Right register block for voices 9 .. 17 */ | |
771 | reg_side = OPL3_RIGHT; | |
772 | voice_offset = voice - MAX_OPL2_VOICES; | |
773 | } | |
774 | ||
775 | snd_opl3_calc_pitch(&fnum, &blocknum, vp->note, vp->chan); | |
776 | ||
777 | /* Set OPL3 FNUM_LOW register of requested voice */ | |
778 | opl3_reg = reg_side | (OPL3_REG_FNUM_LOW + voice_offset); | |
779 | opl3->command(opl3, opl3_reg, fnum); | |
780 | ||
781 | vp->keyon_reg = blocknum; | |
782 | ||
783 | /* Set output sound flag */ | |
784 | blocknum |= OPL3_KEYON_BIT; | |
785 | ||
786 | /* Set OPL3 KEYON_BLOCK register of requested voice */ | |
787 | opl3_reg = reg_side | (OPL3_REG_KEYON_BLOCK + voice_offset); | |
788 | opl3->command(opl3, opl3_reg, blocknum); | |
789 | ||
790 | vp->time = opl3->use_time++; | |
791 | } | |
792 | ||
793 | /* | |
794 | * Update voice pitch controller | |
795 | */ | |
5b1646a8 | 796 | static void snd_opl3_pitch_ctrl(struct snd_opl3 *opl3, struct snd_midi_channel *chan) |
1da177e4 LT |
797 | { |
798 | int voice; | |
5b1646a8 | 799 | struct snd_opl3_voice *vp; |
1da177e4 LT |
800 | |
801 | unsigned long flags; | |
802 | ||
803 | spin_lock_irqsave(&opl3->voice_lock, flags); | |
804 | ||
805 | if (opl3->synth_mode == SNDRV_OPL3_MODE_SEQ) { | |
806 | for (voice = 0; voice < opl3->max_voices; voice++) { | |
807 | vp = &opl3->voices[voice]; | |
808 | if (vp->state > 0 && vp->chan == chan) { | |
809 | snd_opl3_update_pitch(opl3, voice); | |
810 | } | |
811 | } | |
812 | } else { | |
813 | /* remap OSS voices */ | |
814 | if (chan->number < MAX_OPL3_VOICES) { | |
815 | voice = snd_opl3_oss_map[chan->number]; | |
816 | snd_opl3_update_pitch(opl3, voice); | |
817 | } | |
818 | } | |
819 | spin_unlock_irqrestore(&opl3->voice_lock, flags); | |
820 | } | |
821 | ||
822 | /* | |
3a4fa0a2 | 823 | * Deal with a controller type event. This includes all types of |
1da177e4 LT |
824 | * control events, not just the midi controllers |
825 | */ | |
5b1646a8 | 826 | void snd_opl3_control(void *p, int type, struct snd_midi_channel *chan) |
1da177e4 | 827 | { |
5b1646a8 | 828 | struct snd_opl3 *opl3; |
1da177e4 LT |
829 | |
830 | opl3 = p; | |
831 | #ifdef DEBUG_MIDI | |
45203832 | 832 | snd_printk(KERN_DEBUG "Controller, TYPE = %i, ch#: %i, inst#: %i\n", |
1da177e4 LT |
833 | type, chan->number, chan->midi_program); |
834 | #endif | |
835 | ||
836 | switch (type) { | |
837 | case MIDI_CTL_MSB_MODWHEEL: | |
838 | if (chan->control[MIDI_CTL_MSB_MODWHEEL] > 63) | |
839 | opl3->drum_reg |= OPL3_VIBRATO_DEPTH; | |
840 | else | |
841 | opl3->drum_reg &= ~OPL3_VIBRATO_DEPTH; | |
842 | opl3->command(opl3, OPL3_LEFT | OPL3_REG_PERCUSSION, | |
843 | opl3->drum_reg); | |
844 | break; | |
845 | case MIDI_CTL_E2_TREMOLO_DEPTH: | |
846 | if (chan->control[MIDI_CTL_E2_TREMOLO_DEPTH] > 63) | |
847 | opl3->drum_reg |= OPL3_TREMOLO_DEPTH; | |
848 | else | |
849 | opl3->drum_reg &= ~OPL3_TREMOLO_DEPTH; | |
850 | opl3->command(opl3, OPL3_LEFT | OPL3_REG_PERCUSSION, | |
851 | opl3->drum_reg); | |
852 | break; | |
853 | case MIDI_CTL_PITCHBEND: | |
854 | snd_opl3_pitch_ctrl(opl3, chan); | |
855 | break; | |
856 | } | |
857 | } | |
858 | ||
859 | /* | |
860 | * NRPN events | |
861 | */ | |
5b1646a8 TI |
862 | void snd_opl3_nrpn(void *p, struct snd_midi_channel *chan, |
863 | struct snd_midi_channel_set *chset) | |
1da177e4 | 864 | { |
5b1646a8 | 865 | struct snd_opl3 *opl3; |
1da177e4 LT |
866 | |
867 | opl3 = p; | |
868 | #ifdef DEBUG_MIDI | |
45203832 | 869 | snd_printk(KERN_DEBUG "NRPN, ch#: %i, inst#: %i\n", |
1da177e4 LT |
870 | chan->number, chan->midi_program); |
871 | #endif | |
872 | } | |
873 | ||
874 | /* | |
875 | * receive sysex | |
876 | */ | |
877 | void snd_opl3_sysex(void *p, unsigned char *buf, int len, | |
5b1646a8 | 878 | int parsed, struct snd_midi_channel_set *chset) |
1da177e4 | 879 | { |
5b1646a8 | 880 | struct snd_opl3 *opl3; |
1da177e4 LT |
881 | |
882 | opl3 = p; | |
883 | #ifdef DEBUG_MIDI | |
45203832 | 884 | snd_printk(KERN_DEBUG "SYSEX\n"); |
1da177e4 LT |
885 | #endif |
886 | } |