2 * OSS compatible sequencer driver
6 * Copyright (C) 1998,99 Takashi Iwai <tiwai@suse.de>
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23 #include "seq_oss_midi.h"
24 #include "seq_oss_readq.h"
25 #include "seq_oss_timer.h"
26 #include "seq_oss_event.h"
27 #include <sound/seq_midi_event.h>
28 #include "../seq_lock.h"
29 #include <linux/init.h>
35 #define SNDRV_SEQ_OSS_MAX_MIDI_NAME 30
38 * definition of midi device record
40 struct seq_oss_midi_t {
41 int seq_device; /* device number */
42 int client; /* sequencer client number */
43 int port; /* sequencer port number */
44 unsigned int flags; /* port capability */
45 int opened; /* flag for opening */
46 unsigned char name[SNDRV_SEQ_OSS_MAX_MIDI_NAME];
47 snd_midi_event_t *coder; /* MIDI event coder */
48 seq_oss_devinfo_t *devinfo; /* assigned OSSseq device */
49 snd_use_lock_t use_lock;
56 static int max_midi_devs;
57 static seq_oss_midi_t *midi_devs[SNDRV_SEQ_OSS_MAX_MIDI_DEVS];
59 static DEFINE_SPINLOCK(register_lock);
64 static seq_oss_midi_t *get_mdev(int dev);
65 static seq_oss_midi_t *get_mididev(seq_oss_devinfo_t *dp, int dev);
66 static int send_synth_event(seq_oss_devinfo_t *dp, snd_seq_event_t *ev, int dev);
67 static int send_midi_event(seq_oss_devinfo_t *dp, snd_seq_event_t *ev, seq_oss_midi_t *mdev);
70 * look up the existing ports
71 * this looks a very exhausting job.
74 snd_seq_oss_midi_lookup_ports(int client)
76 snd_seq_client_info_t *clinfo;
77 snd_seq_port_info_t *pinfo;
79 clinfo = kzalloc(sizeof(*clinfo), GFP_KERNEL);
80 pinfo = kzalloc(sizeof(*pinfo), GFP_KERNEL);
81 if (! clinfo || ! pinfo) {
87 while (snd_seq_kernel_client_ctl(client, SNDRV_SEQ_IOCTL_QUERY_NEXT_CLIENT, clinfo) == 0) {
88 if (clinfo->client == client)
89 continue; /* ignore myself */
90 pinfo->addr.client = clinfo->client;
91 pinfo->addr.port = -1;
92 while (snd_seq_kernel_client_ctl(client, SNDRV_SEQ_IOCTL_QUERY_NEXT_PORT, pinfo) == 0)
93 snd_seq_oss_midi_check_new_port(pinfo);
103 static seq_oss_midi_t *
106 seq_oss_midi_t *mdev;
109 spin_lock_irqsave(®ister_lock, flags);
110 mdev = midi_devs[dev];
112 snd_use_lock_use(&mdev->use_lock);
113 spin_unlock_irqrestore(®ister_lock, flags);
118 * look for the identical slot
120 static seq_oss_midi_t *
121 find_slot(int client, int port)
124 seq_oss_midi_t *mdev;
127 spin_lock_irqsave(®ister_lock, flags);
128 for (i = 0; i < max_midi_devs; i++) {
130 if (mdev && mdev->client == client && mdev->port == port) {
132 snd_use_lock_use(&mdev->use_lock);
133 spin_unlock_irqrestore(®ister_lock, flags);
137 spin_unlock_irqrestore(®ister_lock, flags);
142 #define PERM_WRITE (SNDRV_SEQ_PORT_CAP_WRITE|SNDRV_SEQ_PORT_CAP_SUBS_WRITE)
143 #define PERM_READ (SNDRV_SEQ_PORT_CAP_READ|SNDRV_SEQ_PORT_CAP_SUBS_READ)
145 * register a new port if it doesn't exist yet
148 snd_seq_oss_midi_check_new_port(snd_seq_port_info_t *pinfo)
151 seq_oss_midi_t *mdev;
154 debug_printk(("check for MIDI client %d port %d\n", pinfo->addr.client, pinfo->addr.port));
155 /* the port must include generic midi */
156 if (! (pinfo->type & SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC))
158 /* either read or write subscribable */
159 if ((pinfo->capability & PERM_WRITE) != PERM_WRITE &&
160 (pinfo->capability & PERM_READ) != PERM_READ)
164 * look for the identical slot
166 if ((mdev = find_slot(pinfo->addr.client, pinfo->addr.port)) != NULL) {
168 snd_use_lock_free(&mdev->use_lock);
173 * allocate midi info record
175 if ((mdev = kzalloc(sizeof(*mdev), GFP_KERNEL)) == NULL) {
176 snd_printk(KERN_ERR "can't malloc midi info\n");
180 /* copy the port information */
181 mdev->client = pinfo->addr.client;
182 mdev->port = pinfo->addr.port;
183 mdev->flags = pinfo->capability;
185 snd_use_lock_init(&mdev->use_lock);
187 /* copy and truncate the name of synth device */
188 strlcpy(mdev->name, pinfo->name, sizeof(mdev->name));
190 /* create MIDI coder */
191 if (snd_midi_event_new(MAX_MIDI_EVENT_BUF, &mdev->coder) < 0) {
192 snd_printk(KERN_ERR "can't malloc midi coder\n");
196 /* OSS sequencer adds running status to all sequences */
197 snd_midi_event_no_status(mdev->coder, 1);
200 * look for en empty slot
202 spin_lock_irqsave(®ister_lock, flags);
203 for (i = 0; i < max_midi_devs; i++) {
204 if (midi_devs[i] == NULL)
207 if (i >= max_midi_devs) {
208 if (max_midi_devs >= SNDRV_SEQ_OSS_MAX_MIDI_DEVS) {
209 spin_unlock_irqrestore(®ister_lock, flags);
210 snd_midi_event_free(mdev->coder);
216 mdev->seq_device = i;
217 midi_devs[mdev->seq_device] = mdev;
218 spin_unlock_irqrestore(®ister_lock, flags);
224 * release the midi device if it was registered
227 snd_seq_oss_midi_check_exit_port(int client, int port)
229 seq_oss_midi_t *mdev;
233 if ((mdev = find_slot(client, port)) != NULL) {
234 spin_lock_irqsave(®ister_lock, flags);
235 midi_devs[mdev->seq_device] = NULL;
236 spin_unlock_irqrestore(®ister_lock, flags);
237 snd_use_lock_free(&mdev->use_lock);
238 snd_use_lock_sync(&mdev->use_lock);
240 snd_midi_event_free(mdev->coder);
243 spin_lock_irqsave(®ister_lock, flags);
244 for (index = max_midi_devs - 1; index >= 0; index--) {
245 if (midi_devs[index])
248 max_midi_devs = index + 1;
249 spin_unlock_irqrestore(®ister_lock, flags);
255 * release the midi device if it was registered
258 snd_seq_oss_midi_clear_all(void)
261 seq_oss_midi_t *mdev;
264 spin_lock_irqsave(®ister_lock, flags);
265 for (i = 0; i < max_midi_devs; i++) {
266 if ((mdev = midi_devs[i]) != NULL) {
268 snd_midi_event_free(mdev->coder);
274 spin_unlock_irqrestore(®ister_lock, flags);
282 snd_seq_oss_midi_setup(seq_oss_devinfo_t *dp)
284 dp->max_mididev = max_midi_devs;
288 * clean up midi tables
291 snd_seq_oss_midi_cleanup(seq_oss_devinfo_t *dp)
294 for (i = 0; i < dp->max_mididev; i++)
295 snd_seq_oss_midi_close(dp, i);
301 * open all midi devices. ignore errors.
304 snd_seq_oss_midi_open_all(seq_oss_devinfo_t *dp, int file_mode)
307 for (i = 0; i < dp->max_mididev; i++)
308 snd_seq_oss_midi_open(dp, i, file_mode);
313 * get the midi device information
315 static seq_oss_midi_t *
316 get_mididev(seq_oss_devinfo_t *dp, int dev)
318 if (dev < 0 || dev >= dp->max_mididev)
320 return get_mdev(dev);
325 * open the midi device if not opened yet
328 snd_seq_oss_midi_open(seq_oss_devinfo_t *dp, int dev, int fmode)
331 seq_oss_midi_t *mdev;
332 snd_seq_port_subscribe_t subs;
334 if ((mdev = get_mididev(dp, dev)) == NULL)
338 if (mdev->opened && mdev->devinfo != dp) {
339 snd_use_lock_free(&mdev->use_lock);
344 if (is_write_mode(fmode))
346 if (is_read_mode(fmode))
350 snd_use_lock_free(&mdev->use_lock);
354 /* already opened? */
355 if ((mdev->opened & perm) == perm) {
356 snd_use_lock_free(&mdev->use_lock);
360 perm &= ~mdev->opened;
362 memset(&subs, 0, sizeof(subs));
364 if (perm & PERM_WRITE) {
365 subs.sender = dp->addr;
366 subs.dest.client = mdev->client;
367 subs.dest.port = mdev->port;
368 if (snd_seq_kernel_client_ctl(dp->cseq, SNDRV_SEQ_IOCTL_SUBSCRIBE_PORT, &subs) >= 0)
369 mdev->opened |= PERM_WRITE;
371 if (perm & PERM_READ) {
372 subs.sender.client = mdev->client;
373 subs.sender.port = mdev->port;
374 subs.dest = dp->addr;
375 subs.flags = SNDRV_SEQ_PORT_SUBS_TIMESTAMP;
376 subs.queue = dp->queue; /* queue for timestamps */
377 if (snd_seq_kernel_client_ctl(dp->cseq, SNDRV_SEQ_IOCTL_SUBSCRIBE_PORT, &subs) >= 0)
378 mdev->opened |= PERM_READ;
381 if (! mdev->opened) {
382 snd_use_lock_free(&mdev->use_lock);
387 snd_use_lock_free(&mdev->use_lock);
392 * close the midi device if already opened
395 snd_seq_oss_midi_close(seq_oss_devinfo_t *dp, int dev)
397 seq_oss_midi_t *mdev;
398 snd_seq_port_subscribe_t subs;
400 if ((mdev = get_mididev(dp, dev)) == NULL)
402 if (! mdev->opened || mdev->devinfo != dp) {
403 snd_use_lock_free(&mdev->use_lock);
407 debug_printk(("closing client %d port %d mode %d\n", mdev->client, mdev->port, mdev->opened));
408 memset(&subs, 0, sizeof(subs));
409 if (mdev->opened & PERM_WRITE) {
410 subs.sender = dp->addr;
411 subs.dest.client = mdev->client;
412 subs.dest.port = mdev->port;
413 snd_seq_kernel_client_ctl(dp->cseq, SNDRV_SEQ_IOCTL_UNSUBSCRIBE_PORT, &subs);
415 if (mdev->opened & PERM_READ) {
416 subs.sender.client = mdev->client;
417 subs.sender.port = mdev->port;
418 subs.dest = dp->addr;
419 snd_seq_kernel_client_ctl(dp->cseq, SNDRV_SEQ_IOCTL_UNSUBSCRIBE_PORT, &subs);
423 mdev->devinfo = NULL;
425 snd_use_lock_free(&mdev->use_lock);
430 * change seq capability flags to file mode flags
433 snd_seq_oss_midi_filemode(seq_oss_devinfo_t *dp, int dev)
435 seq_oss_midi_t *mdev;
438 if ((mdev = get_mididev(dp, dev)) == NULL)
442 if (mdev->opened & PERM_WRITE)
443 mode |= SNDRV_SEQ_OSS_FILE_WRITE;
444 if (mdev->opened & PERM_READ)
445 mode |= SNDRV_SEQ_OSS_FILE_READ;
447 snd_use_lock_free(&mdev->use_lock);
452 * reset the midi device and close it:
453 * so far, only close the device.
456 snd_seq_oss_midi_reset(seq_oss_devinfo_t *dp, int dev)
458 seq_oss_midi_t *mdev;
460 if ((mdev = get_mididev(dp, dev)) == NULL)
462 if (! mdev->opened) {
463 snd_use_lock_free(&mdev->use_lock);
467 if (mdev->opened & PERM_WRITE) {
471 debug_printk(("resetting client %d port %d\n", mdev->client, mdev->port));
472 memset(&ev, 0, sizeof(ev));
473 ev.dest.client = mdev->client;
474 ev.dest.port = mdev->port;
475 ev.queue = dp->queue;
476 ev.source.port = dp->port;
477 if (dp->seq_mode == SNDRV_SEQ_OSS_MODE_SYNTH) {
478 ev.type = SNDRV_SEQ_EVENT_SENSING;
479 snd_seq_oss_dispatch(dp, &ev, 0, 0); /* active sensing */
481 for (c = 0; c < 16; c++) {
482 ev.type = SNDRV_SEQ_EVENT_CONTROLLER;
483 ev.data.control.channel = c;
484 ev.data.control.param = 123;
485 snd_seq_oss_dispatch(dp, &ev, 0, 0); /* all notes off */
486 if (dp->seq_mode == SNDRV_SEQ_OSS_MODE_MUSIC) {
487 ev.data.control.param = 121;
488 snd_seq_oss_dispatch(dp, &ev, 0, 0); /* reset all controllers */
489 ev.type = SNDRV_SEQ_EVENT_PITCHBEND;
490 ev.data.control.value = 0;
491 snd_seq_oss_dispatch(dp, &ev, 0, 0); /* bender off */
495 // snd_seq_oss_midi_close(dp, dev);
496 snd_use_lock_free(&mdev->use_lock);
501 * get client/port of the specified MIDI device
504 snd_seq_oss_midi_get_addr(seq_oss_devinfo_t *dp, int dev, snd_seq_addr_t *addr)
506 seq_oss_midi_t *mdev;
508 if ((mdev = get_mididev(dp, dev)) == NULL)
510 addr->client = mdev->client;
511 addr->port = mdev->port;
512 snd_use_lock_free(&mdev->use_lock);
517 * input callback - this can be atomic
520 snd_seq_oss_midi_input(snd_seq_event_t *ev, int direct, void *private_data)
522 seq_oss_devinfo_t *dp = (seq_oss_devinfo_t *)private_data;
523 seq_oss_midi_t *mdev;
526 if (dp->readq == NULL)
528 if ((mdev = find_slot(ev->source.client, ev->source.port)) == NULL)
530 if (! (mdev->opened & PERM_READ)) {
531 snd_use_lock_free(&mdev->use_lock);
535 if (dp->seq_mode == SNDRV_SEQ_OSS_MODE_MUSIC)
536 rc = send_synth_event(dp, ev, mdev->seq_device);
538 rc = send_midi_event(dp, ev, mdev);
540 snd_use_lock_free(&mdev->use_lock);
545 * convert ALSA sequencer event to OSS synth event
548 send_synth_event(seq_oss_devinfo_t *dp, snd_seq_event_t *ev, int dev)
552 memset(&ossev, 0, sizeof(ossev));
555 case SNDRV_SEQ_EVENT_NOTEON:
556 ossev.v.cmd = MIDI_NOTEON; break;
557 case SNDRV_SEQ_EVENT_NOTEOFF:
558 ossev.v.cmd = MIDI_NOTEOFF; break;
559 case SNDRV_SEQ_EVENT_KEYPRESS:
560 ossev.v.cmd = MIDI_KEY_PRESSURE; break;
561 case SNDRV_SEQ_EVENT_CONTROLLER:
562 ossev.l.cmd = MIDI_CTL_CHANGE; break;
563 case SNDRV_SEQ_EVENT_PGMCHANGE:
564 ossev.l.cmd = MIDI_PGM_CHANGE; break;
565 case SNDRV_SEQ_EVENT_CHANPRESS:
566 ossev.l.cmd = MIDI_CHN_PRESSURE; break;
567 case SNDRV_SEQ_EVENT_PITCHBEND:
568 ossev.l.cmd = MIDI_PITCH_BEND; break;
570 return 0; /* not supported */
576 case SNDRV_SEQ_EVENT_NOTEON:
577 case SNDRV_SEQ_EVENT_NOTEOFF:
578 case SNDRV_SEQ_EVENT_KEYPRESS:
579 ossev.v.code = EV_CHN_VOICE;
580 ossev.v.note = ev->data.note.note;
581 ossev.v.parm = ev->data.note.velocity;
582 ossev.v.chn = ev->data.note.channel;
584 case SNDRV_SEQ_EVENT_CONTROLLER:
585 case SNDRV_SEQ_EVENT_PGMCHANGE:
586 case SNDRV_SEQ_EVENT_CHANPRESS:
587 ossev.l.code = EV_CHN_COMMON;
588 ossev.l.p1 = ev->data.control.param;
589 ossev.l.val = ev->data.control.value;
590 ossev.l.chn = ev->data.control.channel;
592 case SNDRV_SEQ_EVENT_PITCHBEND:
593 ossev.l.code = EV_CHN_COMMON;
594 ossev.l.val = ev->data.control.value + 8192;
595 ossev.l.chn = ev->data.control.channel;
599 snd_seq_oss_readq_put_timestamp(dp->readq, ev->time.tick, dp->seq_mode);
600 snd_seq_oss_readq_put_event(dp->readq, &ossev);
606 * decode event and send MIDI bytes to read queue
609 send_midi_event(seq_oss_devinfo_t *dp, snd_seq_event_t *ev, seq_oss_midi_t *mdev)
614 snd_seq_oss_readq_put_timestamp(dp->readq, ev->time.tick, dp->seq_mode);
615 if (!dp->timer->running)
616 len = snd_seq_oss_timer_start(dp->timer);
617 if (ev->type == SNDRV_SEQ_EVENT_SYSEX) {
618 if ((ev->flags & SNDRV_SEQ_EVENT_LENGTH_MASK) == SNDRV_SEQ_EVENT_LENGTH_VARIABLE)
619 snd_seq_oss_readq_puts(dp->readq, mdev->seq_device,
620 ev->data.ext.ptr, ev->data.ext.len);
622 len = snd_midi_event_decode(mdev->coder, msg, sizeof(msg), ev);
624 snd_seq_oss_readq_puts(dp->readq, mdev->seq_device, msg, len);
633 * return 0 : enqueued
634 * non-zero : invalid - ignored
637 snd_seq_oss_midi_putc(seq_oss_devinfo_t *dp, int dev, unsigned char c, snd_seq_event_t *ev)
639 seq_oss_midi_t *mdev;
641 if ((mdev = get_mididev(dp, dev)) == NULL)
643 if (snd_midi_event_encode_byte(mdev->coder, c, ev) > 0) {
644 snd_seq_oss_fill_addr(dp, ev, mdev->client, mdev->port);
645 snd_use_lock_free(&mdev->use_lock);
648 snd_use_lock_free(&mdev->use_lock);
653 * create OSS compatible midi_info record
656 snd_seq_oss_midi_make_info(seq_oss_devinfo_t *dp, int dev, struct midi_info *inf)
658 seq_oss_midi_t *mdev;
660 if ((mdev = get_mididev(dp, dev)) == NULL)
663 inf->dev_type = 0; /* FIXME: ?? */
664 inf->capabilities = 0; /* FIXME: ?? */
665 strlcpy(inf->name, mdev->name, sizeof(inf->name));
666 snd_use_lock_free(&mdev->use_lock);
677 val &= PERM_READ|PERM_WRITE;
678 if (val == (PERM_READ|PERM_WRITE))
680 else if (val == PERM_READ)
682 else if (val == PERM_WRITE)
689 snd_seq_oss_midi_info_read(snd_info_buffer_t *buf)
692 seq_oss_midi_t *mdev;
694 snd_iprintf(buf, "\nNumber of MIDI devices: %d\n", max_midi_devs);
695 for (i = 0; i < max_midi_devs; i++) {
696 snd_iprintf(buf, "\nmidi %d: ", i);
699 snd_iprintf(buf, "*empty*\n");
702 snd_iprintf(buf, "[%s] ALSA port %d:%d\n", mdev->name,
703 mdev->client, mdev->port);
704 snd_iprintf(buf, " capability %s / opened %s\n",
705 capmode_str(mdev->flags),
706 capmode_str(mdev->opened));
707 snd_use_lock_free(&mdev->use_lock);