aufs: update the donator
[zen-stable.git] / sound / oss / midi_synth.c
blob2292c230d7e6fb33d0894e9b8fff16d4e2d4e552
1 /*
2 * sound/oss/midi_synth.c
4 * High level midi sequencer manager for dumb MIDI interfaces.
5 */
6 /*
7 * Copyright (C) by Hannu Savolainen 1993-1997
9 * OSS/Free for Linux is distributed under the GNU GENERAL PUBLIC LICENSE (GPL)
10 * Version 2 (June 1991). See the "COPYING" file distributed with this software
11 * for more info.
14 * Thomas Sailer : ioctl code reworked (vmalloc/vfree removed)
15 * Andrew Veliath : fixed running status in MIDI input state machine
17 #define USE_SEQ_MACROS
18 #define USE_SIMPLE_MACROS
20 #include "sound_config.h"
22 #define _MIDI_SYNTH_C_
24 #include "midi_synth.h"
26 static int midi2synth[MAX_MIDI_DEV];
27 static int sysex_state[MAX_MIDI_DEV] =
28 {0};
29 static unsigned char prev_out_status[MAX_MIDI_DEV];
31 #define STORE(cmd) \
32 { \
33 int len; \
34 unsigned char obuf[8]; \
35 cmd; \
36 seq_input_event(obuf, len); \
39 #define _seqbuf obuf
40 #define _seqbufptr 0
41 #define _SEQ_ADVBUF(x) len=x
43 void
44 do_midi_msg(int synthno, unsigned char *msg, int mlen)
46 switch (msg[0] & 0xf0)
48 case 0x90:
49 if (msg[2] != 0)
51 STORE(SEQ_START_NOTE(synthno, msg[0] & 0x0f, msg[1], msg[2]));
52 break;
54 msg[2] = 64;
56 case 0x80:
57 STORE(SEQ_STOP_NOTE(synthno, msg[0] & 0x0f, msg[1], msg[2]));
58 break;
60 case 0xA0:
61 STORE(SEQ_KEY_PRESSURE(synthno, msg[0] & 0x0f, msg[1], msg[2]));
62 break;
64 case 0xB0:
65 STORE(SEQ_CONTROL(synthno, msg[0] & 0x0f,
66 msg[1], msg[2]));
67 break;
69 case 0xC0:
70 STORE(SEQ_SET_PATCH(synthno, msg[0] & 0x0f, msg[1]));
71 break;
73 case 0xD0:
74 STORE(SEQ_CHN_PRESSURE(synthno, msg[0] & 0x0f, msg[1]));
75 break;
77 case 0xE0:
78 STORE(SEQ_BENDER(synthno, msg[0] & 0x0f,
79 (msg[1] & 0x7f) | ((msg[2] & 0x7f) << 7)));
80 break;
82 default:
83 /* printk( "MPU: Unknown midi channel message %02x\n", msg[0]); */
87 EXPORT_SYMBOL(do_midi_msg);
89 static void
90 midi_outc(int midi_dev, int data)
92 int timeout;
94 for (timeout = 0; timeout < 3200; timeout++)
95 if (midi_devs[midi_dev]->outputc(midi_dev, (unsigned char) (data & 0xff)))
97 if (data & 0x80) /*
98 * Status byte
100 prev_out_status[midi_dev] =
101 (unsigned char) (data & 0xff); /*
102 * Store for running status
104 return; /*
105 * Mission complete
109 * Sorry! No space on buffers.
111 printk("Midi send timed out\n");
114 static int
115 prefix_cmd(int midi_dev, unsigned char status)
117 if ((char *) midi_devs[midi_dev]->prefix_cmd == NULL)
118 return 1;
120 return midi_devs[midi_dev]->prefix_cmd(midi_dev, status);
123 static void
124 midi_synth_input(int orig_dev, unsigned char data)
126 int dev;
127 struct midi_input_info *inc;
129 static unsigned char len_tab[] = /* # of data bytes following a status
132 2, /* 8x */
133 2, /* 9x */
134 2, /* Ax */
135 2, /* Bx */
136 1, /* Cx */
137 1, /* Dx */
138 2, /* Ex */
139 0 /* Fx */
142 if (orig_dev < 0 || orig_dev > num_midis || midi_devs[orig_dev] == NULL)
143 return;
145 if (data == 0xfe) /* Ignore active sensing */
146 return;
148 dev = midi2synth[orig_dev];
149 inc = &midi_devs[orig_dev]->in_info;
151 switch (inc->m_state)
153 case MST_INIT:
154 if (data & 0x80) /* MIDI status byte */
156 if ((data & 0xf0) == 0xf0) /* Common message */
158 switch (data)
160 case 0xf0: /* Sysex */
161 inc->m_state = MST_SYSEX;
162 break; /* Sysex */
164 case 0xf1: /* MTC quarter frame */
165 case 0xf3: /* Song select */
166 inc->m_state = MST_DATA;
167 inc->m_ptr = 1;
168 inc->m_left = 1;
169 inc->m_buf[0] = data;
170 break;
172 case 0xf2: /* Song position pointer */
173 inc->m_state = MST_DATA;
174 inc->m_ptr = 1;
175 inc->m_left = 2;
176 inc->m_buf[0] = data;
177 break;
179 default:
180 inc->m_buf[0] = data;
181 inc->m_ptr = 1;
182 do_midi_msg(dev, inc->m_buf, inc->m_ptr);
183 inc->m_ptr = 0;
184 inc->m_left = 0;
186 } else
188 inc->m_state = MST_DATA;
189 inc->m_ptr = 1;
190 inc->m_left = len_tab[(data >> 4) - 8];
191 inc->m_buf[0] = inc->m_prev_status = data;
193 } else if (inc->m_prev_status & 0x80) {
194 /* Data byte (use running status) */
195 inc->m_ptr = 2;
196 inc->m_buf[1] = data;
197 inc->m_buf[0] = inc->m_prev_status;
198 inc->m_left = len_tab[(inc->m_buf[0] >> 4) - 8] - 1;
199 if (inc->m_left > 0)
200 inc->m_state = MST_DATA; /* Not done yet */
201 else {
202 inc->m_state = MST_INIT;
203 do_midi_msg(dev, inc->m_buf, inc->m_ptr);
204 inc->m_ptr = 0;
207 break; /* MST_INIT */
209 case MST_DATA:
210 inc->m_buf[inc->m_ptr++] = data;
211 if (--inc->m_left <= 0)
213 inc->m_state = MST_INIT;
214 do_midi_msg(dev, inc->m_buf, inc->m_ptr);
215 inc->m_ptr = 0;
217 break; /* MST_DATA */
219 case MST_SYSEX:
220 if (data == 0xf7) /* Sysex end */
222 inc->m_state = MST_INIT;
223 inc->m_left = 0;
224 inc->m_ptr = 0;
226 break; /* MST_SYSEX */
228 default:
229 printk("MIDI%d: Unexpected state %d (%02x)\n", orig_dev, inc->m_state, (int) data);
230 inc->m_state = MST_INIT;
234 static void
235 leave_sysex(int dev)
237 int orig_dev = synth_devs[dev]->midi_dev;
238 int timeout = 0;
240 if (!sysex_state[dev])
241 return;
243 sysex_state[dev] = 0;
245 while (!midi_devs[orig_dev]->outputc(orig_dev, 0xf7) &&
246 timeout < 1000)
247 timeout++;
249 sysex_state[dev] = 0;
252 static void
253 midi_synth_output(int dev)
256 * Currently NOP
260 int midi_synth_ioctl(int dev, unsigned int cmd, void __user *arg)
263 * int orig_dev = synth_devs[dev]->midi_dev;
266 switch (cmd) {
268 case SNDCTL_SYNTH_INFO:
269 if (__copy_to_user(arg, synth_devs[dev]->info, sizeof(struct synth_info)))
270 return -EFAULT;
271 return 0;
273 case SNDCTL_SYNTH_MEMAVL:
274 return 0x7fffffff;
276 default:
277 return -EINVAL;
280 EXPORT_SYMBOL(midi_synth_ioctl);
283 midi_synth_kill_note(int dev, int channel, int note, int velocity)
285 int orig_dev = synth_devs[dev]->midi_dev;
286 int msg, chn;
288 if (note < 0 || note > 127)
289 return 0;
290 if (channel < 0 || channel > 15)
291 return 0;
292 if (velocity < 0)
293 velocity = 0;
294 if (velocity > 127)
295 velocity = 127;
297 leave_sysex(dev);
299 msg = prev_out_status[orig_dev] & 0xf0;
300 chn = prev_out_status[orig_dev] & 0x0f;
302 if (chn == channel && ((msg == 0x90 && velocity == 64) || msg == 0x80))
303 { /*
304 * Use running status
306 if (!prefix_cmd(orig_dev, note))
307 return 0;
309 midi_outc(orig_dev, note);
311 if (msg == 0x90) /*
312 * Running status = Note on
314 midi_outc(orig_dev, 0); /*
315 * Note on with velocity 0 == note
316 * off
318 else
319 midi_outc(orig_dev, velocity);
320 } else
322 if (velocity == 64)
324 if (!prefix_cmd(orig_dev, 0x90 | (channel & 0x0f)))
325 return 0;
326 midi_outc(orig_dev, 0x90 | (channel & 0x0f)); /*
327 * Note on
329 midi_outc(orig_dev, note);
330 midi_outc(orig_dev, 0); /*
331 * Zero G
333 } else
335 if (!prefix_cmd(orig_dev, 0x80 | (channel & 0x0f)))
336 return 0;
337 midi_outc(orig_dev, 0x80 | (channel & 0x0f)); /*
338 * Note off
340 midi_outc(orig_dev, note);
341 midi_outc(orig_dev, velocity);
345 return 0;
347 EXPORT_SYMBOL(midi_synth_kill_note);
350 midi_synth_set_instr(int dev, int channel, int instr_no)
352 int orig_dev = synth_devs[dev]->midi_dev;
354 if (instr_no < 0 || instr_no > 127)
355 instr_no = 0;
356 if (channel < 0 || channel > 15)
357 return 0;
359 leave_sysex(dev);
361 if (!prefix_cmd(orig_dev, 0xc0 | (channel & 0x0f)))
362 return 0;
363 midi_outc(orig_dev, 0xc0 | (channel & 0x0f)); /*
364 * Program change
366 midi_outc(orig_dev, instr_no);
368 return 0;
370 EXPORT_SYMBOL(midi_synth_set_instr);
373 midi_synth_start_note(int dev, int channel, int note, int velocity)
375 int orig_dev = synth_devs[dev]->midi_dev;
376 int msg, chn;
378 if (note < 0 || note > 127)
379 return 0;
380 if (channel < 0 || channel > 15)
381 return 0;
382 if (velocity < 0)
383 velocity = 0;
384 if (velocity > 127)
385 velocity = 127;
387 leave_sysex(dev);
389 msg = prev_out_status[orig_dev] & 0xf0;
390 chn = prev_out_status[orig_dev] & 0x0f;
392 if (chn == channel && msg == 0x90)
393 { /*
394 * Use running status
396 if (!prefix_cmd(orig_dev, note))
397 return 0;
398 midi_outc(orig_dev, note);
399 midi_outc(orig_dev, velocity);
400 } else
402 if (!prefix_cmd(orig_dev, 0x90 | (channel & 0x0f)))
403 return 0;
404 midi_outc(orig_dev, 0x90 | (channel & 0x0f)); /*
405 * Note on
407 midi_outc(orig_dev, note);
408 midi_outc(orig_dev, velocity);
410 return 0;
412 EXPORT_SYMBOL(midi_synth_start_note);
414 void
415 midi_synth_reset(int dev)
418 leave_sysex(dev);
420 EXPORT_SYMBOL(midi_synth_reset);
423 midi_synth_open(int dev, int mode)
425 int orig_dev = synth_devs[dev]->midi_dev;
426 int err;
427 struct midi_input_info *inc;
429 if (orig_dev < 0 || orig_dev >= num_midis || midi_devs[orig_dev] == NULL)
430 return -ENXIO;
432 midi2synth[orig_dev] = dev;
433 sysex_state[dev] = 0;
434 prev_out_status[orig_dev] = 0;
436 if ((err = midi_devs[orig_dev]->open(orig_dev, mode,
437 midi_synth_input, midi_synth_output)) < 0)
438 return err;
439 inc = &midi_devs[orig_dev]->in_info;
441 /* save_flags(flags);
442 cli();
443 don't know against what irqhandler to protect*/
444 inc->m_busy = 0;
445 inc->m_state = MST_INIT;
446 inc->m_ptr = 0;
447 inc->m_left = 0;
448 inc->m_prev_status = 0x00;
449 /* restore_flags(flags); */
451 return 1;
453 EXPORT_SYMBOL(midi_synth_open);
455 void
456 midi_synth_close(int dev)
458 int orig_dev = synth_devs[dev]->midi_dev;
460 leave_sysex(dev);
463 * Shut up the synths by sending just single active sensing message.
465 midi_devs[orig_dev]->outputc(orig_dev, 0xfe);
467 midi_devs[orig_dev]->close(orig_dev);
469 EXPORT_SYMBOL(midi_synth_close);
471 void
472 midi_synth_hw_control(int dev, unsigned char *event)
475 EXPORT_SYMBOL(midi_synth_hw_control);
478 midi_synth_load_patch(int dev, int format, const char __user *addr,
479 int count, int pmgr_flag)
481 int orig_dev = synth_devs[dev]->midi_dev;
483 struct sysex_info sysex;
484 int i;
485 unsigned long left, src_offs, eox_seen = 0;
486 int first_byte = 1;
487 int hdr_size = (unsigned long) &sysex.data[0] - (unsigned long) &sysex;
489 leave_sysex(dev);
491 if (!prefix_cmd(orig_dev, 0xf0))
492 return 0;
494 /* Invalid patch format */
495 if (format != SYSEX_PATCH)
496 return -EINVAL;
498 /* Patch header too short */
499 if (count < hdr_size)
500 return -EINVAL;
502 count -= hdr_size;
505 * Copy the header from user space
508 if (copy_from_user(&sysex, addr, hdr_size))
509 return -EFAULT;
511 /* Sysex record too short */
512 if ((unsigned)count < (unsigned)sysex.len)
513 sysex.len = count;
515 left = sysex.len;
516 src_offs = 0;
518 for (i = 0; i < left && !signal_pending(current); i++)
520 unsigned char data;
522 if (get_user(data,
523 (unsigned char __user *)(addr + hdr_size + i)))
524 return -EFAULT;
526 eox_seen = (i > 0 && data & 0x80); /* End of sysex */
528 if (eox_seen && data != 0xf7)
529 data = 0xf7;
531 if (i == 0)
533 if (data != 0xf0)
535 printk(KERN_WARNING "midi_synth: Sysex start missing\n");
536 return -EINVAL;
539 while (!midi_devs[orig_dev]->outputc(orig_dev, (unsigned char) (data & 0xff)) &&
540 !signal_pending(current))
541 schedule();
543 if (!first_byte && data & 0x80)
544 return 0;
545 first_byte = 0;
548 if (!eox_seen)
549 midi_outc(orig_dev, 0xf7);
550 return 0;
552 EXPORT_SYMBOL(midi_synth_load_patch);
554 void midi_synth_panning(int dev, int channel, int pressure)
557 EXPORT_SYMBOL(midi_synth_panning);
559 void midi_synth_aftertouch(int dev, int channel, int pressure)
561 int orig_dev = synth_devs[dev]->midi_dev;
562 int msg, chn;
564 if (pressure < 0 || pressure > 127)
565 return;
566 if (channel < 0 || channel > 15)
567 return;
569 leave_sysex(dev);
571 msg = prev_out_status[orig_dev] & 0xf0;
572 chn = prev_out_status[orig_dev] & 0x0f;
574 if (msg != 0xd0 || chn != channel) /*
575 * Test for running status
578 if (!prefix_cmd(orig_dev, 0xd0 | (channel & 0x0f)))
579 return;
580 midi_outc(orig_dev, 0xd0 | (channel & 0x0f)); /*
581 * Channel pressure
583 } else if (!prefix_cmd(orig_dev, pressure))
584 return;
586 midi_outc(orig_dev, pressure);
588 EXPORT_SYMBOL(midi_synth_aftertouch);
590 void
591 midi_synth_controller(int dev, int channel, int ctrl_num, int value)
593 int orig_dev = synth_devs[dev]->midi_dev;
594 int chn, msg;
596 if (ctrl_num < 0 || ctrl_num > 127)
597 return;
598 if (channel < 0 || channel > 15)
599 return;
601 leave_sysex(dev);
603 msg = prev_out_status[orig_dev] & 0xf0;
604 chn = prev_out_status[orig_dev] & 0x0f;
606 if (msg != 0xb0 || chn != channel)
608 if (!prefix_cmd(orig_dev, 0xb0 | (channel & 0x0f)))
609 return;
610 midi_outc(orig_dev, 0xb0 | (channel & 0x0f));
611 } else if (!prefix_cmd(orig_dev, ctrl_num))
612 return;
614 midi_outc(orig_dev, ctrl_num);
615 midi_outc(orig_dev, value & 0x7f);
617 EXPORT_SYMBOL(midi_synth_controller);
619 void
620 midi_synth_bender(int dev, int channel, int value)
622 int orig_dev = synth_devs[dev]->midi_dev;
623 int msg, prev_chn;
625 if (channel < 0 || channel > 15)
626 return;
628 if (value < 0 || value > 16383)
629 return;
631 leave_sysex(dev);
633 msg = prev_out_status[orig_dev] & 0xf0;
634 prev_chn = prev_out_status[orig_dev] & 0x0f;
636 if (msg != 0xd0 || prev_chn != channel) /*
637 * Test for running status
640 if (!prefix_cmd(orig_dev, 0xe0 | (channel & 0x0f)))
641 return;
642 midi_outc(orig_dev, 0xe0 | (channel & 0x0f));
643 } else if (!prefix_cmd(orig_dev, value & 0x7f))
644 return;
646 midi_outc(orig_dev, value & 0x7f);
647 midi_outc(orig_dev, (value >> 7) & 0x7f);
649 EXPORT_SYMBOL(midi_synth_bender);
651 void
652 midi_synth_setup_voice(int dev, int voice, int channel)
655 EXPORT_SYMBOL(midi_synth_setup_voice);
658 midi_synth_send_sysex(int dev, unsigned char *bytes, int len)
660 int orig_dev = synth_devs[dev]->midi_dev;
661 int i;
663 for (i = 0; i < len; i++)
665 switch (bytes[i])
667 case 0xf0: /* Start sysex */
668 if (!prefix_cmd(orig_dev, 0xf0))
669 return 0;
670 sysex_state[dev] = 1;
671 break;
673 case 0xf7: /* End sysex */
674 if (!sysex_state[dev]) /* Orphan sysex end */
675 return 0;
676 sysex_state[dev] = 0;
677 break;
679 default:
680 if (!sysex_state[dev])
681 return 0;
683 if (bytes[i] & 0x80) /* Error. Another message before sysex end */
685 bytes[i] = 0xf7; /* Sysex end */
686 sysex_state[dev] = 0;
690 if (!midi_devs[orig_dev]->outputc(orig_dev, bytes[i]))
693 * Hardware level buffer is full. Abort the sysex message.
696 int timeout = 0;
698 bytes[i] = 0xf7;
699 sysex_state[dev] = 0;
701 while (!midi_devs[orig_dev]->outputc(orig_dev, bytes[i]) &&
702 timeout < 1000)
703 timeout++;
705 if (!sysex_state[dev])
706 return 0;
709 return 0;
711 EXPORT_SYMBOL(midi_synth_send_sysex);