2 * sound/oss/sequencer.c
4 * The sequencer personality manager.
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
14 * Thomas Sailer : ioctl code reworked (vmalloc/vfree removed)
15 * Alan Cox : reformatted and fixed a pair of null pointer bugs
17 #include <linux/kmod.h>
18 #include <linux/spinlock.h>
19 #include "sound_config.h"
21 #include "midi_ctrl.h"
24 static int sequencer_ok;
25 static struct sound_timer_operations *tmr;
26 static int tmr_no = -1; /* Currently selected timer */
27 static int pending_timer = -1; /* For timer change operation */
28 extern unsigned long seq_time;
30 static int obsolete_api_used;
31 static DEFINE_SPINLOCK(lock);
34 * Local counts for number of synth and MIDI devices. These are initialized
35 * by the sequencer_open.
37 static int max_mididev;
38 static int max_synthdev;
41 * The seq_mode gives the operating mode of the sequencer:
42 * 1 = level1 (the default)
43 * 2 = level2 (extended capabilities)
48 static int seq_mode = SEQ_1;
50 static DECLARE_WAIT_QUEUE_HEAD(seq_sleeper);
51 static DECLARE_WAIT_QUEUE_HEAD(midi_sleeper);
53 static int midi_opened[MAX_MIDI_DEV];
55 static int midi_written[MAX_MIDI_DEV];
57 static unsigned long prev_input_time;
58 static int prev_event_time;
65 static unsigned char *queue;
66 static unsigned char *iqueue;
68 static volatile int qhead, qtail, qlen;
69 static volatile int iqhead, iqtail, iqlen;
70 static volatile int seq_playing;
71 static volatile int sequencer_busy;
72 static int output_threshold;
73 static long pre_event_timeout;
74 static unsigned synth_open_mask;
76 static int seq_queue(unsigned char *note, char nonblock);
77 static void seq_startplay(void);
78 static int seq_sync(void);
79 static void seq_reset(void);
81 #if MAX_SYNTH_DEV > 15
82 #error Too many synthesizer devices enabled.
85 int sequencer_read(int dev, struct file *file, char __user *buf, int count)
93 ev_len = seq_mode == SEQ_1 ? 4 : 8;
95 spin_lock_irqsave(&lock,flags);
99 spin_unlock_irqrestore(&lock,flags);
100 if (file->f_flags & O_NONBLOCK) {
104 oss_broken_sleep_on(&midi_sleeper, pre_event_timeout);
105 spin_lock_irqsave(&lock,flags);
108 spin_unlock_irqrestore(&lock,flags);
112 while (iqlen && c >= ev_len)
114 char *fixit = (char *) &iqueue[iqhead * IEV_SZ];
115 spin_unlock_irqrestore(&lock,flags);
116 if (copy_to_user(&(buf)[p], fixit, ev_len))
121 spin_lock_irqsave(&lock,flags);
122 iqhead = (iqhead + 1) % SEQ_MAX_QUEUE;
125 spin_unlock_irqrestore(&lock,flags);
129 static void sequencer_midi_output(int dev)
136 void seq_copy_to_input(unsigned char *event_rec, int len)
141 * Verify that the len is valid for the current mode.
144 if (len != 4 && len != 8)
146 if ((seq_mode == SEQ_1) != (len == 4))
149 if (iqlen >= (SEQ_MAX_QUEUE - 1))
150 return; /* Overflow */
152 spin_lock_irqsave(&lock,flags);
153 memcpy(&iqueue[iqtail * IEV_SZ], event_rec, len);
155 iqtail = (iqtail + 1) % SEQ_MAX_QUEUE;
156 wake_up(&midi_sleeper);
157 spin_unlock_irqrestore(&lock,flags);
159 EXPORT_SYMBOL(seq_copy_to_input);
161 static void sequencer_midi_input(int dev, unsigned char data)
164 unsigned char event_rec[4];
166 if (data == 0xfe) /* Ignore active sensing */
169 tstamp = jiffies - seq_time;
171 if (tstamp != prev_input_time)
173 tstamp = (tstamp << 8) | SEQ_WAIT;
174 seq_copy_to_input((unsigned char *) &tstamp, 4);
175 prev_input_time = tstamp;
177 event_rec[0] = SEQ_MIDIPUTC;
182 seq_copy_to_input(event_rec, 4);
185 void seq_input_event(unsigned char *event_rec, int len)
187 unsigned long this_time;
189 if (seq_mode == SEQ_2)
190 this_time = tmr->get_time(tmr_no);
192 this_time = jiffies - seq_time;
194 if (this_time != prev_input_time)
196 unsigned char tmp_event[8];
198 tmp_event[0] = EV_TIMING;
199 tmp_event[1] = TMR_WAIT_ABS;
202 *(unsigned int *) &tmp_event[4] = this_time;
204 seq_copy_to_input(tmp_event, 8);
205 prev_input_time = this_time;
207 seq_copy_to_input(event_rec, len);
209 EXPORT_SYMBOL(seq_input_event);
211 int sequencer_write(int dev, struct file *file, const char __user *buf, int count)
213 unsigned char event_rec[EV_SZ], ev_code;
214 int p = 0, c, ev_size;
215 int mode = translate_mode(file);
219 if (mode == OPEN_READ)
226 if (copy_from_user((char *) event_rec, &(buf)[p], 4))
228 ev_code = event_rec[0];
230 if (ev_code == SEQ_FULLSIZE)
234 dev = *(unsigned short *) &event_rec[2];
235 if (dev < 0 || dev >= max_synthdev || synth_devs[dev] == NULL)
238 if (!(synth_open_mask & (1 << dev)))
241 fmt = (*(short *) &event_rec[0]) & 0xffff;
242 err = synth_devs[dev]->load_patch(dev, fmt, buf + p, c, 0);
250 if (seq_mode == SEQ_2 && ev_code == SEQ_EXTENDED)
252 printk(KERN_WARNING "Sequencer: Invalid level 2 event %x\n", ev_code);
263 if (copy_from_user((char *)&event_rec[4],
270 if (seq_mode == SEQ_2)
272 printk(KERN_WARNING "Sequencer: 4 byte event in level 2 mode\n");
277 if (event_rec[0] != SEQ_MIDIPUTC)
278 obsolete_api_used = 1;
281 if (event_rec[0] == SEQ_MIDIPUTC)
283 if (!midi_opened[event_rec[2]])
286 int dev = event_rec[2];
288 if (dev >= max_mididev || midi_devs[dev]==NULL)
290 /*printk("Sequencer Error: Nonexistent MIDI device %d\n", dev);*/
293 mode = translate_mode(file);
295 if ((err = midi_devs[dev]->open(dev, mode,
296 sequencer_midi_input, sequencer_midi_output)) < 0)
299 printk(KERN_WARNING "Sequencer Error: Unable to open Midi #%d\n", dev);
302 midi_opened[dev] = 1;
305 if (!seq_queue(event_rec, (file->f_flags & (O_NONBLOCK) ? 1 : 0)))
307 int processed = count - c;
312 if (!processed && (file->f_flags & O_NONBLOCK))
327 static int seq_queue(unsigned char *note, char nonblock)
331 * Test if there is space in the queue
334 if (qlen >= SEQ_MAX_QUEUE)
337 * Give chance to drain the queue
340 if (!nonblock && qlen >= SEQ_MAX_QUEUE && !waitqueue_active(&seq_sleeper)) {
342 * Sleep until there is enough space on the queue
344 oss_broken_sleep_on(&seq_sleeper, MAX_SCHEDULE_TIMEOUT);
346 if (qlen >= SEQ_MAX_QUEUE)
352 memcpy(&queue[qtail * EV_SZ], note, EV_SZ);
354 qtail = (qtail + 1) % SEQ_MAX_QUEUE;
360 static int extended_event(unsigned char *q)
364 if (dev < 0 || dev >= max_synthdev)
367 if (!(synth_open_mask & (1 << dev)))
373 synth_devs[dev]->kill_note(dev, q[3], q[4], q[5]);
377 if (q[4] > 127 && q[4] != 255)
382 synth_devs[dev]->kill_note(dev, q[3], q[4], q[5]);
385 synth_devs[dev]->start_note(dev, q[3], q[4], q[5]);
389 synth_devs[dev]->set_instr(dev, q[3], q[4]);
393 synth_devs[dev]->aftertouch(dev, q[3], q[4]);
397 synth_devs[dev]->panning(dev, q[3], (char) q[4]);
401 synth_devs[dev]->controller(dev, q[3], q[4], (short) (q[5] | (q[6] << 8)));
405 if (synth_devs[dev]->volume_method != NULL)
406 synth_devs[dev]->volume_method(dev, q[3]);
415 static int find_voice(int dev, int chn, int note)
420 key = (chn << 8) | (note + 1);
421 for (i = 0; i < synth_devs[dev]->alloc.max_voice; i++)
422 if (synth_devs[dev]->alloc.map[i] == key)
427 static int alloc_voice(int dev, int chn, int note)
432 key = (chn << 8) | (note + 1);
434 voice = synth_devs[dev]->alloc_voice(dev, chn, note,
435 &synth_devs[dev]->alloc);
436 synth_devs[dev]->alloc.map[voice] = key;
437 synth_devs[dev]->alloc.alloc_times[voice] =
438 synth_devs[dev]->alloc.timestamp++;
442 static void seq_chn_voice_event(unsigned char *event_rec)
444 #define dev event_rec[1]
445 #define cmd event_rec[2]
446 #define chn event_rec[3]
447 #define note event_rec[4]
448 #define parm event_rec[5]
452 if ((int) dev > max_synthdev || synth_devs[dev] == NULL)
454 if (!(synth_open_mask & (1 << dev)))
456 if (!synth_devs[dev])
459 if (seq_mode == SEQ_2)
461 if (synth_devs[dev]->alloc_voice)
462 voice = find_voice(dev, chn, note);
464 if (cmd == MIDI_NOTEON && parm == 0)
474 if (note > 127 && note != 255) /* Not a seq2 feature */
477 if (voice == -1 && seq_mode == SEQ_2 && synth_devs[dev]->alloc_voice)
479 /* Internal synthesizer (FM, GUS, etc) */
480 voice = alloc_voice(dev, chn, note);
485 if (seq_mode == SEQ_2 && (int) dev < num_synths)
488 * The MIDI channel 10 is a percussive channel. Use the note
489 * number to select the proper patch (128 to 255) to play.
494 synth_devs[dev]->set_instr(dev, voice, 128 + note);
495 synth_devs[dev]->chn_info[chn].pgm_num = 128 + note;
497 synth_devs[dev]->setup_voice(dev, voice, chn);
499 synth_devs[dev]->start_note(dev, voice, note, parm);
505 synth_devs[dev]->kill_note(dev, voice, note, parm);
508 case MIDI_KEY_PRESSURE:
511 synth_devs[dev]->aftertouch(dev, voice, parm);
524 static void seq_chn_common_event(unsigned char *event_rec)
526 unsigned char dev = event_rec[1];
527 unsigned char cmd = event_rec[2];
528 unsigned char chn = event_rec[3];
529 unsigned char p1 = event_rec[4];
531 /* unsigned char p2 = event_rec[5]; */
532 unsigned short w14 = *(short *) &event_rec[6];
534 if ((int) dev > max_synthdev || synth_devs[dev] == NULL)
536 if (!(synth_open_mask & (1 << dev)))
538 if (!synth_devs[dev])
543 case MIDI_PGM_CHANGE:
544 if (seq_mode == SEQ_2)
549 synth_devs[dev]->chn_info[chn].pgm_num = p1;
550 if ((int) dev >= num_synths)
551 synth_devs[dev]->set_instr(dev, chn, p1);
554 synth_devs[dev]->set_instr(dev, chn, p1);
558 case MIDI_CTL_CHANGE:
559 if (seq_mode == SEQ_2)
561 if (chn > 15 || p1 > 127)
564 synth_devs[dev]->chn_info[chn].controllers[p1] = w14 & 0x7f;
566 if (p1 < 32) /* Setting MSB should clear LSB to 0 */
567 synth_devs[dev]->chn_info[chn].controllers[p1 + 32] = 0;
569 if ((int) dev < num_synths)
571 int val = w14 & 0x7f;
574 if (p1 < 64) /* Combine MSB and LSB */
576 val = ((synth_devs[dev]->
577 chn_info[chn].controllers[p1 & ~32] & 0x7f) << 7)
579 chn_info[chn].controllers[p1 | 32] & 0x7f);
582 /* Handle all playing notes on this channel */
584 key = ((int) chn << 8);
586 for (i = 0; i < synth_devs[dev]->alloc.max_voice; i++)
587 if ((synth_devs[dev]->alloc.map[i] & 0xff00) == key)
588 synth_devs[dev]->controller(dev, i, p1, val);
591 synth_devs[dev]->controller(dev, chn, p1, w14);
594 synth_devs[dev]->controller(dev, chn, p1, w14);
597 case MIDI_PITCH_BEND:
598 if (seq_mode == SEQ_2)
603 synth_devs[dev]->chn_info[chn].bender_value = w14;
605 if ((int) dev < num_synths)
607 /* Handle all playing notes on this channel */
612 for (i = 0; i < synth_devs[dev]->alloc.max_voice; i++)
613 if ((synth_devs[dev]->alloc.map[i] & 0xff00) == key)
614 synth_devs[dev]->bender(dev, i, w14);
617 synth_devs[dev]->bender(dev, chn, w14);
620 synth_devs[dev]->bender(dev, chn, w14);
627 static int seq_timing_event(unsigned char *event_rec)
629 unsigned char cmd = event_rec[1];
630 unsigned int parm = *(int *) &event_rec[4];
632 if (seq_mode == SEQ_2)
636 if ((ret = tmr->event(tmr_no, event_rec)) == TIMER_ARMED)
637 if ((SEQ_MAX_QUEUE - qlen) >= output_threshold)
638 wake_up(&seq_sleeper);
644 parm += prev_event_time;
647 * NOTE! No break here. Execution of TMR_WAIT_REL continues in the
648 * next case (TMR_WAIT_ABS)
657 prev_event_time = time;
660 request_sound_timer(time);
662 if ((SEQ_MAX_QUEUE - qlen) >= output_threshold)
663 wake_up(&seq_sleeper);
684 parm = (parm << 8 | SEQ_ECHO);
685 seq_copy_to_input((unsigned char *) &parm, 4);
691 return TIMER_NOT_ARMED;
694 static void seq_local_event(unsigned char *event_rec)
696 unsigned char cmd = event_rec[1];
697 unsigned int parm = *((unsigned int *) &event_rec[4]);
701 case LOCL_STARTAUDIO:
702 DMAbuf_start_devices(parm);
709 static void seq_sysex_message(unsigned char *event_rec)
711 unsigned int dev = event_rec[1];
713 unsigned char *buf = &event_rec[2];
715 if (dev > max_synthdev)
717 if (!(synth_open_mask & (1 << dev)))
719 if (!synth_devs[dev])
723 for (i = 0; i < 6 && buf[i] != 0xff; i++)
726 if (!synth_devs[dev]->send_sysex)
729 synth_devs[dev]->send_sysex(dev, buf, l);
732 static int play_event(unsigned char *q)
735 * NOTE! This routine returns
736 * 0 = normal event played.
737 * 1 = Timer armed. Suspend playback until timer callback.
738 * 2 = MIDI output buffer full. Restore queue and suspend until timer
745 if (synth_open_mask & (1 << 0))
747 synth_devs[0]->kill_note(0, q[1], 255, q[3]);
751 if (q[4] < 128 || q[4] == 255)
752 if (synth_open_mask & (1 << 0))
754 synth_devs[0]->start_note(0, q[1], q[2], q[3]);
758 delay = (unsigned int *) q; /*
759 * Bytes 1 to 3 are containing the *
762 *delay = (*delay >> 8) & 0xffffff;
770 prev_event_time = time;
772 request_sound_timer(time);
774 if ((SEQ_MAX_QUEUE - qlen) >= output_threshold)
775 wake_up(&seq_sleeper);
777 * The timer is now active and will reinvoke this function
778 * after the timer expires. Return to the caller now.
785 if (synth_open_mask & (1 << 0))
787 synth_devs[0]->set_instr(0, q[1], q[2]);
790 case SEQ_SYNCTIMER: /*
798 case SEQ_MIDIPUTC: /*
799 * Put a midi character
801 if (midi_opened[q[2]])
807 if (dev < 0 || dev >= num_midis || midi_devs[dev] == NULL)
810 if (!midi_devs[dev]->outputc(dev, q[1]))
813 * Output FIFO is full. Wait one timer cycle and try again.
817 request_sound_timer(-1);
821 midi_written[dev] = 1;
826 seq_copy_to_input(q, 4); /*
827 * Echo back to the process
832 if ((int) q[1] < max_synthdev)
833 synth_devs[q[1]]->hw_control(q[1], q);
841 seq_chn_voice_event(q);
845 seq_chn_common_event(q);
849 if (seq_timing_event(q) == TIMER_ARMED)
860 seq_sysex_message(q);
868 /* called also as timer in irq context */
869 static void seq_startplay(void)
871 int this_one, action;
877 spin_lock_irqsave(&lock,flags);
878 qhead = ((this_one = qhead) + 1) % SEQ_MAX_QUEUE;
880 spin_unlock_irqrestore(&lock,flags);
884 if ((action = play_event(&queue[this_one * EV_SZ])))
885 { /* Suspend playback. Next timer routine invokes this routine again */
897 if ((SEQ_MAX_QUEUE - qlen) >= output_threshold)
898 wake_up(&seq_sleeper);
901 static void reset_controllers(int dev, unsigned char *controller, int update_dev)
904 for (i = 0; i < 128; i++)
905 controller[i] = ctrl_def_values[i];
908 static void setup_mode2(void)
912 max_synthdev = num_synths;
914 for (dev = 0; dev < num_midis; dev++)
916 if (midi_devs[dev] && midi_devs[dev]->converter != NULL)
918 synth_devs[max_synthdev++] = midi_devs[dev]->converter;
922 for (dev = 0; dev < max_synthdev; dev++)
926 synth_devs[dev]->sysex_ptr = 0;
927 synth_devs[dev]->emulation = 0;
929 for (chn = 0; chn < 16; chn++)
931 synth_devs[dev]->chn_info[chn].pgm_num = 0;
932 reset_controllers(dev,
933 synth_devs[dev]->chn_info[chn].controllers,0);
934 synth_devs[dev]->chn_info[chn].bender_value = (1 << 7); /* Neutral */
935 synth_devs[dev]->chn_info[chn].bender_range = 200;
942 int sequencer_open(int dev, struct file *file)
950 level = ((dev & 0x0f) == SND_DEV_SEQ2) ? 2 : 1;
953 mode = translate_mode(file);
957 /* printk("Sound card: sequencer not initialized\n");*/
960 if (dev) /* Patch manager device (obsolete) */
963 if(synth_devs[dev] == NULL)
964 request_module("synth0");
966 if (mode == OPEN_READ)
970 /*printk("Sequencer: No MIDI devices. Input not possible\n");*/
980 obsolete_api_used = 0;
982 max_mididev = num_midis;
983 max_synthdev = num_synths;
984 pre_event_timeout = MAX_SCHEDULE_TIMEOUT;
987 if (pending_timer != -1)
989 tmr_no = pending_timer;
992 if (tmr_no == -1) /* Not selected yet */
997 for (i = 0; i < num_sound_timers; i++)
998 if (sound_timer_devs[i] && sound_timer_devs[i]->priority > best)
1001 best = sound_timer_devs[i]->priority;
1003 if (tmr_no == -1) /* Should not be */
1006 tmr = sound_timer_devs[tmr_no];
1012 /*printk("sequencer: No timer for level 2\n");*/
1018 if (!max_synthdev && !max_mididev)
1024 synth_open_mask = 0;
1026 for (i = 0; i < max_mididev; i++)
1029 midi_written[i] = 0;
1032 for (i = 0; i < max_synthdev; i++)
1034 if (synth_devs[i]==NULL)
1037 if (!try_module_get(synth_devs[i]->owner))
1040 if ((tmp = synth_devs[i]->open(i, mode)) < 0)
1042 printk(KERN_WARNING "Sequencer: Warning! Cannot open synth device #%d (%d)\n", i, tmp);
1043 if (synth_devs[i]->midi_dev)
1044 printk(KERN_WARNING "(Maps to MIDI dev #%d)\n", synth_devs[i]->midi_dev);
1048 synth_open_mask |= (1 << i);
1049 if (synth_devs[i]->midi_dev)
1050 midi_opened[synth_devs[i]->midi_dev] = 1;
1056 prev_input_time = 0;
1057 prev_event_time = 0;
1059 if (seq_mode == SEQ_1 && (mode == OPEN_READ || mode == OPEN_READWRITE))
1062 * Initialize midi input devices
1065 for (i = 0; i < max_mididev; i++)
1066 if (!midi_opened[i] && midi_devs[i])
1068 if (!try_module_get(midi_devs[i]->owner))
1071 if ((retval = midi_devs[i]->open(i, mode,
1072 sequencer_midi_input, sequencer_midi_output)) >= 0)
1079 if (seq_mode == SEQ_2) {
1080 if (try_module_get(tmr->owner))
1081 tmr->open(tmr_no, seq_mode);
1084 init_waitqueue_head(&seq_sleeper);
1085 init_waitqueue_head(&midi_sleeper);
1086 output_threshold = SEQ_MAX_QUEUE / 2;
1091 static void seq_drain_midi_queues(void)
1096 * Give the Midi drivers time to drain their output queues
1101 while (!signal_pending(current) && n)
1105 for (i = 0; i < max_mididev; i++)
1106 if (midi_opened[i] && midi_written[i])
1107 if (midi_devs[i]->buffer_status != NULL)
1108 if (midi_devs[i]->buffer_status(i))
1112 * Let's have a delay
1116 oss_broken_sleep_on(&seq_sleeper, HZ/10);
1120 void sequencer_release(int dev, struct file *file)
1123 int mode = translate_mode(file);
1128 * Wait until the queue is empty (if we don't have nonblock)
1131 if (mode != OPEN_READ && !(file->f_flags & O_NONBLOCK))
1133 while (!signal_pending(current) && qlen > 0)
1136 oss_broken_sleep_on(&seq_sleeper, 3*HZ);
1141 if (mode != OPEN_READ)
1142 seq_drain_midi_queues(); /*
1143 * Ensure the output queues are empty
1146 if (mode != OPEN_READ)
1147 seq_drain_midi_queues(); /*
1148 * Flush the all notes off messages
1151 for (i = 0; i < max_synthdev; i++)
1153 if (synth_open_mask & (1 << i)) /*
1158 synth_devs[i]->close(i);
1160 module_put(synth_devs[i]->owner);
1162 if (synth_devs[i]->midi_dev)
1163 midi_opened[synth_devs[i]->midi_dev] = 0;
1167 for (i = 0; i < max_mididev; i++)
1169 if (midi_opened[i]) {
1170 midi_devs[i]->close(i);
1171 module_put(midi_devs[i]->owner);
1175 if (seq_mode == SEQ_2) {
1177 module_put(tmr->owner);
1180 if (obsolete_api_used)
1181 printk(KERN_WARNING "/dev/music: Obsolete (4 byte) API was used by %s\n", current->comm);
1185 static int seq_sync(void)
1187 if (qlen && !seq_playing && !signal_pending(current))
1191 oss_broken_sleep_on(&seq_sleeper, HZ);
1195 static void midi_outc(int dev, unsigned char data)
1198 * NOTE! Calls sleep(). Don't call this from interrupt.
1202 unsigned long flags;
1205 * This routine sends one byte to the Midi channel.
1206 * If the output FIFO is full, it waits until there
1207 * is space in the queue
1210 n = 3 * HZ; /* Timeout */
1212 spin_lock_irqsave(&lock,flags);
1213 while (n && !midi_devs[dev]->outputc(dev, data)) {
1214 oss_broken_sleep_on(&seq_sleeper, HZ/25);
1217 spin_unlock_irqrestore(&lock,flags);
1220 static void seq_reset(void)
1223 * NOTE! Calls sleep(). Don't call this from interrupt.
1228 unsigned long flags;
1233 prev_input_time = 0;
1234 prev_event_time = 0;
1236 qlen = qhead = qtail = 0;
1237 iqlen = iqhead = iqtail = 0;
1239 for (i = 0; i < max_synthdev; i++)
1240 if (synth_open_mask & (1 << i))
1242 synth_devs[i]->reset(i);
1244 if (seq_mode == SEQ_2)
1246 for (chn = 0; chn < 16; chn++)
1247 for (i = 0; i < max_synthdev; i++)
1248 if (synth_open_mask & (1 << i))
1251 synth_devs[i]->controller(i, chn, 123, 0); /* All notes off */
1252 synth_devs[i]->controller(i, chn, 121, 0); /* Reset all ctl */
1253 synth_devs[i]->bender(i, chn, 1 << 13); /* Bender off */
1256 else /* seq_mode == SEQ_1 */
1258 for (i = 0; i < max_mididev; i++)
1259 if (midi_written[i]) /*
1260 * Midi used. Some notes may still be playing
1264 * Sending just a ACTIVE SENSING message should be enough to stop all
1265 * playing notes. Since there are devices not recognizing the
1266 * active sensing, we have to send some all notes off messages also.
1270 for (chn = 0; chn < 16; chn++)
1272 midi_outc(i, (unsigned char) (0xb0 + (chn & 0x0f))); /* control change */
1273 midi_outc(i, 0x7b); /* All notes off */
1274 midi_outc(i, 0); /* Dummy parameter */
1277 midi_devs[i]->close(i);
1279 midi_written[i] = 0;
1286 spin_lock_irqsave(&lock,flags);
1288 if (waitqueue_active(&seq_sleeper)) {
1289 /* printk( "Sequencer Warning: Unexpected sleeping process - Waking up\n"); */
1290 wake_up(&seq_sleeper);
1292 spin_unlock_irqrestore(&lock,flags);
1295 static void seq_panic(void)
1298 * This routine is called by the application in case the user
1299 * wants to reset the system to the default state.
1305 * Since some of the devices don't recognize the active sensing and
1306 * all notes off messages, we have to shut all notes manually.
1308 * TO BE IMPLEMENTED LATER
1312 * Also return the controllers to their default states
1316 int sequencer_ioctl(int dev, struct file *file, unsigned int cmd, void __user *arg)
1318 int midi_dev, orig_dev, val, err;
1319 int mode = translate_mode(file);
1320 struct synth_info inf;
1321 struct seq_event_rec event_rec;
1322 int __user *p = arg;
1324 orig_dev = dev = dev >> 4;
1328 case SNDCTL_TMR_TIMEBASE:
1329 case SNDCTL_TMR_TEMPO:
1330 case SNDCTL_TMR_START:
1331 case SNDCTL_TMR_STOP:
1332 case SNDCTL_TMR_CONTINUE:
1333 case SNDCTL_TMR_METRONOME:
1334 case SNDCTL_TMR_SOURCE:
1335 if (seq_mode != SEQ_2)
1337 return tmr->ioctl(tmr_no, cmd, arg);
1339 case SNDCTL_TMR_SELECT:
1340 if (seq_mode != SEQ_2)
1342 if (get_user(pending_timer, p))
1344 if (pending_timer < 0 || pending_timer >= num_sound_timers || sound_timer_devs[pending_timer] == NULL)
1349 val = pending_timer;
1352 case SNDCTL_SEQ_PANIC:
1356 case SNDCTL_SEQ_SYNC:
1357 if (mode == OPEN_READ)
1359 while (qlen > 0 && !signal_pending(current))
1361 return qlen ? -EINTR : 0;
1363 case SNDCTL_SEQ_RESET:
1367 case SNDCTL_SEQ_TESTMIDI:
1368 if (__get_user(midi_dev, p))
1370 if (midi_dev < 0 || midi_dev >= max_mididev || !midi_devs[midi_dev])
1373 if (!midi_opened[midi_dev] &&
1374 (err = midi_devs[midi_dev]->open(midi_dev, mode, sequencer_midi_input,
1375 sequencer_midi_output)) < 0)
1377 midi_opened[midi_dev] = 1;
1380 case SNDCTL_SEQ_GETINCOUNT:
1381 if (mode == OPEN_WRITE)
1386 case SNDCTL_SEQ_GETOUTCOUNT:
1387 if (mode == OPEN_READ)
1389 val = SEQ_MAX_QUEUE - qlen;
1392 case SNDCTL_SEQ_GETTIME:
1393 if (seq_mode == SEQ_2)
1394 return tmr->ioctl(tmr_no, cmd, arg);
1395 val = jiffies - seq_time;
1398 case SNDCTL_SEQ_CTRLRATE:
1400 * If *arg == 0, just return the current rate
1402 if (seq_mode == SEQ_2)
1403 return tmr->ioctl(tmr_no, cmd, arg);
1405 if (get_user(val, p))
1412 case SNDCTL_SEQ_RESETSAMPLES:
1413 case SNDCTL_SYNTH_REMOVESAMPLE:
1414 case SNDCTL_SYNTH_CONTROL:
1415 if (get_user(dev, p))
1417 if (dev < 0 || dev >= num_synths || synth_devs[dev] == NULL)
1419 if (!(synth_open_mask & (1 << dev)) && !orig_dev)
1421 return synth_devs[dev]->ioctl(dev, cmd, arg);
1423 case SNDCTL_SEQ_NRSYNTHS:
1427 case SNDCTL_SEQ_NRMIDIS:
1431 case SNDCTL_SYNTH_MEMAVL:
1432 if (get_user(dev, p))
1434 if (dev < 0 || dev >= num_synths || synth_devs[dev] == NULL)
1436 if (!(synth_open_mask & (1 << dev)) && !orig_dev)
1438 val = synth_devs[dev]->ioctl(dev, cmd, arg);
1441 case SNDCTL_FM_4OP_ENABLE:
1442 if (get_user(dev, p))
1444 if (dev < 0 || dev >= num_synths || synth_devs[dev] == NULL)
1446 if (!(synth_open_mask & (1 << dev)))
1448 synth_devs[dev]->ioctl(dev, cmd, arg);
1451 case SNDCTL_SYNTH_INFO:
1452 if (get_user(dev, &((struct synth_info __user *)arg)->device))
1454 if (dev < 0 || dev >= max_synthdev)
1456 if (!(synth_open_mask & (1 << dev)) && !orig_dev)
1458 return synth_devs[dev]->ioctl(dev, cmd, arg);
1460 /* Like SYNTH_INFO but returns ID in the name field */
1461 case SNDCTL_SYNTH_ID:
1462 if (get_user(dev, &((struct synth_info __user *)arg)->device))
1464 if (dev < 0 || dev >= max_synthdev)
1466 if (!(synth_open_mask & (1 << dev)) && !orig_dev)
1468 memcpy(&inf, synth_devs[dev]->info, sizeof(inf));
1469 strlcpy(inf.name, synth_devs[dev]->id, sizeof(inf.name));
1471 return copy_to_user(arg, &inf, sizeof(inf))?-EFAULT:0;
1473 case SNDCTL_SEQ_OUTOFBAND:
1474 if (copy_from_user(&event_rec, arg, sizeof(event_rec)))
1476 play_event(event_rec.arr);
1479 case SNDCTL_MIDI_INFO:
1480 if (get_user(dev, &((struct midi_info __user *)arg)->device))
1482 if (dev < 0 || dev >= max_mididev || !midi_devs[dev])
1484 midi_devs[dev]->info.device = dev;
1485 return copy_to_user(arg, &midi_devs[dev]->info, sizeof(struct midi_info))?-EFAULT:0;
1487 case SNDCTL_SEQ_THRESHOLD:
1488 if (get_user(val, p))
1492 if (val >= SEQ_MAX_QUEUE)
1493 val = SEQ_MAX_QUEUE - 1;
1494 output_threshold = val;
1497 case SNDCTL_MIDI_PRETIME:
1498 if (get_user(val, p))
1502 val = (HZ * val) / 10;
1503 pre_event_timeout = val;
1507 if (mode == OPEN_READ)
1511 if (!(synth_open_mask & (1 << 0)))
1513 if (!synth_devs[0]->ioctl)
1515 return synth_devs[0]->ioctl(0, cmd, arg);
1517 return put_user(val, p);
1520 /* No kernel lock - we're using the global irq lock here */
1521 unsigned int sequencer_poll(int dev, struct file *file, poll_table * wait)
1523 unsigned long flags;
1524 unsigned int mask = 0;
1528 spin_lock_irqsave(&lock,flags);
1530 poll_wait(file, &midi_sleeper, wait);
1532 mask |= POLLIN | POLLRDNORM;
1535 poll_wait(file, &seq_sleeper, wait);
1536 if ((SEQ_MAX_QUEUE - qlen) >= output_threshold)
1537 mask |= POLLOUT | POLLWRNORM;
1538 spin_unlock_irqrestore(&lock,flags);
1543 void sequencer_timer(unsigned long dummy)
1547 EXPORT_SYMBOL(sequencer_timer);
1549 int note_to_freq(int note_num)
1553 * This routine converts a midi note to a frequency (multiplied by 1000)
1556 int note, octave, note_freq;
1557 static int notes[] =
1559 261632, 277189, 293671, 311132, 329632, 349232,
1560 369998, 391998, 415306, 440000, 466162, 493880
1563 #define BASE_OCTAVE 5
1565 octave = note_num / 12;
1566 note = note_num % 12;
1568 note_freq = notes[note];
1570 if (octave < BASE_OCTAVE)
1571 note_freq >>= (BASE_OCTAVE - octave);
1572 else if (octave > BASE_OCTAVE)
1573 note_freq <<= (octave - BASE_OCTAVE);
1581 EXPORT_SYMBOL(note_to_freq);
1583 unsigned long compute_finetune(unsigned long base_freq, int bend, int range,
1586 unsigned long amount;
1587 int negative, semitones, cents, multiplier = 1;
1600 bend = bend * range / 8192; /* Convert to cents */
1601 bend += vibrato_cents;
1606 negative = bend < 0 ? 1 : 0;
1623 semitones = bend / 100;
1626 amount = (int) (semitone_tuning[semitones] * multiplier * cent_tuning[cents]) / 10000;
1629 return (base_freq * 10000) / amount; /* Bend down */
1631 return (base_freq * amount) / 10000; /* Bend up */
1633 EXPORT_SYMBOL(compute_finetune);
1635 void sequencer_init(void)
1639 queue = vmalloc(SEQ_MAX_QUEUE * EV_SZ);
1642 printk(KERN_ERR "sequencer: Can't allocate memory for sequencer output queue\n");
1645 iqueue = vmalloc(SEQ_MAX_QUEUE * IEV_SZ);
1648 printk(KERN_ERR "sequencer: Can't allocate memory for sequencer input queue\n");
1654 EXPORT_SYMBOL(sequencer_init);
1656 void sequencer_unload(void)
1660 queue = iqueue = NULL;