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 <sound/asoundef.h>
24 #include "seq_oss_midi.h"
25 #include "seq_oss_readq.h"
26 #include "seq_oss_timer.h"
27 #include "seq_oss_event.h"
28 #include <sound/seq_midi_event.h>
29 #include "../seq_lock.h"
30 #include <linux/init.h>
31 #include <linux/slab.h>
32 #include <linux/nospec.h>
38 #define SNDRV_SEQ_OSS_MAX_MIDI_NAME 30
41 * definition of midi device record
44 int seq_device; /* device number */
45 int client; /* sequencer client number */
46 int port; /* sequencer port number */
47 unsigned int flags; /* port capability */
48 int opened; /* flag for opening */
49 unsigned char name[SNDRV_SEQ_OSS_MAX_MIDI_NAME];
50 struct snd_midi_event *coder; /* MIDI event coder */
51 struct seq_oss_devinfo *devinfo; /* assigned OSSseq device */
52 snd_use_lock_t use_lock;
59 static int max_midi_devs;
60 static struct seq_oss_midi *midi_devs[SNDRV_SEQ_OSS_MAX_MIDI_DEVS];
62 static DEFINE_SPINLOCK(register_lock);
67 static struct seq_oss_midi *get_mdev(int dev);
68 static struct seq_oss_midi *get_mididev(struct seq_oss_devinfo *dp, int dev);
69 static int send_synth_event(struct seq_oss_devinfo *dp, struct snd_seq_event *ev, int dev);
70 static int send_midi_event(struct seq_oss_devinfo *dp, struct snd_seq_event *ev, struct seq_oss_midi *mdev);
73 * look up the existing ports
74 * this looks a very exhausting job.
77 snd_seq_oss_midi_lookup_ports(int client)
79 struct snd_seq_client_info *clinfo;
80 struct snd_seq_port_info *pinfo;
82 clinfo = kzalloc(sizeof(*clinfo), GFP_KERNEL);
83 pinfo = kzalloc(sizeof(*pinfo), GFP_KERNEL);
84 if (! clinfo || ! pinfo) {
90 while (snd_seq_kernel_client_ctl(client, SNDRV_SEQ_IOCTL_QUERY_NEXT_CLIENT, clinfo) == 0) {
91 if (clinfo->client == client)
92 continue; /* ignore myself */
93 pinfo->addr.client = clinfo->client;
94 pinfo->addr.port = -1;
95 while (snd_seq_kernel_client_ctl(client, SNDRV_SEQ_IOCTL_QUERY_NEXT_PORT, pinfo) == 0)
96 snd_seq_oss_midi_check_new_port(pinfo);
106 static struct seq_oss_midi *
109 struct seq_oss_midi *mdev;
112 spin_lock_irqsave(®ister_lock, flags);
113 mdev = midi_devs[dev];
115 snd_use_lock_use(&mdev->use_lock);
116 spin_unlock_irqrestore(®ister_lock, flags);
121 * look for the identical slot
123 static struct seq_oss_midi *
124 find_slot(int client, int port)
127 struct seq_oss_midi *mdev;
130 spin_lock_irqsave(®ister_lock, flags);
131 for (i = 0; i < max_midi_devs; i++) {
133 if (mdev && mdev->client == client && mdev->port == port) {
135 snd_use_lock_use(&mdev->use_lock);
136 spin_unlock_irqrestore(®ister_lock, flags);
140 spin_unlock_irqrestore(®ister_lock, flags);
145 #define PERM_WRITE (SNDRV_SEQ_PORT_CAP_WRITE|SNDRV_SEQ_PORT_CAP_SUBS_WRITE)
146 #define PERM_READ (SNDRV_SEQ_PORT_CAP_READ|SNDRV_SEQ_PORT_CAP_SUBS_READ)
148 * register a new port if it doesn't exist yet
151 snd_seq_oss_midi_check_new_port(struct snd_seq_port_info *pinfo)
154 struct seq_oss_midi *mdev;
157 /* the port must include generic midi */
158 if (! (pinfo->type & SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC))
160 /* either read or write subscribable */
161 if ((pinfo->capability & PERM_WRITE) != PERM_WRITE &&
162 (pinfo->capability & PERM_READ) != PERM_READ)
166 * look for the identical slot
168 if ((mdev = find_slot(pinfo->addr.client, pinfo->addr.port)) != NULL) {
170 snd_use_lock_free(&mdev->use_lock);
175 * allocate midi info record
177 mdev = kzalloc(sizeof(*mdev), GFP_KERNEL);
181 /* copy the port information */
182 mdev->client = pinfo->addr.client;
183 mdev->port = pinfo->addr.port;
184 mdev->flags = pinfo->capability;
186 snd_use_lock_init(&mdev->use_lock);
188 /* copy and truncate the name of synth device */
189 strlcpy(mdev->name, pinfo->name, sizeof(mdev->name));
191 /* create MIDI coder */
192 if (snd_midi_event_new(MAX_MIDI_EVENT_BUF, &mdev->coder) < 0) {
193 pr_err("ALSA: seq_oss: can't malloc midi coder\n");
197 /* OSS sequencer adds running status to all sequences */
198 snd_midi_event_no_status(mdev->coder, 1);
201 * look for en empty slot
203 spin_lock_irqsave(®ister_lock, flags);
204 for (i = 0; i < max_midi_devs; i++) {
205 if (midi_devs[i] == NULL)
208 if (i >= max_midi_devs) {
209 if (max_midi_devs >= SNDRV_SEQ_OSS_MAX_MIDI_DEVS) {
210 spin_unlock_irqrestore(®ister_lock, flags);
211 snd_midi_event_free(mdev->coder);
217 mdev->seq_device = i;
218 midi_devs[mdev->seq_device] = mdev;
219 spin_unlock_irqrestore(®ister_lock, flags);
225 * release the midi device if it was registered
228 snd_seq_oss_midi_check_exit_port(int client, int port)
230 struct seq_oss_midi *mdev;
234 if ((mdev = find_slot(client, port)) != NULL) {
235 spin_lock_irqsave(®ister_lock, flags);
236 midi_devs[mdev->seq_device] = NULL;
237 spin_unlock_irqrestore(®ister_lock, flags);
238 snd_use_lock_free(&mdev->use_lock);
239 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 struct seq_oss_midi *mdev;
264 spin_lock_irqsave(®ister_lock, flags);
265 for (i = 0; i < max_midi_devs; i++) {
266 if ((mdev = midi_devs[i]) != NULL) {
267 snd_midi_event_free(mdev->coder);
273 spin_unlock_irqrestore(®ister_lock, flags);
281 snd_seq_oss_midi_setup(struct seq_oss_devinfo *dp)
283 dp->max_mididev = max_midi_devs;
287 * clean up midi tables
290 snd_seq_oss_midi_cleanup(struct seq_oss_devinfo *dp)
293 for (i = 0; i < dp->max_mididev; i++)
294 snd_seq_oss_midi_close(dp, i);
300 * open all midi devices. ignore errors.
303 snd_seq_oss_midi_open_all(struct seq_oss_devinfo *dp, int file_mode)
306 for (i = 0; i < dp->max_mididev; i++)
307 snd_seq_oss_midi_open(dp, i, file_mode);
312 * get the midi device information
314 static struct seq_oss_midi *
315 get_mididev(struct seq_oss_devinfo *dp, int dev)
317 if (dev < 0 || dev >= dp->max_mididev)
319 dev = array_index_nospec(dev, dp->max_mididev);
320 return get_mdev(dev);
325 * open the midi device if not opened yet
328 snd_seq_oss_midi_open(struct seq_oss_devinfo *dp, int dev, int fmode)
331 struct seq_oss_midi *mdev;
332 struct snd_seq_port_subscribe 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(struct seq_oss_devinfo *dp, int dev)
397 struct seq_oss_midi *mdev;
398 struct snd_seq_port_subscribe 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 memset(&subs, 0, sizeof(subs));
408 if (mdev->opened & PERM_WRITE) {
409 subs.sender = dp->addr;
410 subs.dest.client = mdev->client;
411 subs.dest.port = mdev->port;
412 snd_seq_kernel_client_ctl(dp->cseq, SNDRV_SEQ_IOCTL_UNSUBSCRIBE_PORT, &subs);
414 if (mdev->opened & PERM_READ) {
415 subs.sender.client = mdev->client;
416 subs.sender.port = mdev->port;
417 subs.dest = dp->addr;
418 snd_seq_kernel_client_ctl(dp->cseq, SNDRV_SEQ_IOCTL_UNSUBSCRIBE_PORT, &subs);
422 mdev->devinfo = NULL;
424 snd_use_lock_free(&mdev->use_lock);
429 * change seq capability flags to file mode flags
432 snd_seq_oss_midi_filemode(struct seq_oss_devinfo *dp, int dev)
434 struct seq_oss_midi *mdev;
437 if ((mdev = get_mididev(dp, dev)) == NULL)
441 if (mdev->opened & PERM_WRITE)
442 mode |= SNDRV_SEQ_OSS_FILE_WRITE;
443 if (mdev->opened & PERM_READ)
444 mode |= SNDRV_SEQ_OSS_FILE_READ;
446 snd_use_lock_free(&mdev->use_lock);
451 * reset the midi device and close it:
452 * so far, only close the device.
455 snd_seq_oss_midi_reset(struct seq_oss_devinfo *dp, int dev)
457 struct seq_oss_midi *mdev;
459 if ((mdev = get_mididev(dp, dev)) == NULL)
461 if (! mdev->opened) {
462 snd_use_lock_free(&mdev->use_lock);
466 if (mdev->opened & PERM_WRITE) {
467 struct snd_seq_event ev;
470 memset(&ev, 0, sizeof(ev));
471 ev.dest.client = mdev->client;
472 ev.dest.port = mdev->port;
473 ev.queue = dp->queue;
474 ev.source.port = dp->port;
475 if (dp->seq_mode == SNDRV_SEQ_OSS_MODE_SYNTH) {
476 ev.type = SNDRV_SEQ_EVENT_SENSING;
477 snd_seq_oss_dispatch(dp, &ev, 0, 0);
479 for (c = 0; c < 16; c++) {
480 ev.type = SNDRV_SEQ_EVENT_CONTROLLER;
481 ev.data.control.channel = c;
482 ev.data.control.param = MIDI_CTL_ALL_NOTES_OFF;
483 snd_seq_oss_dispatch(dp, &ev, 0, 0);
484 if (dp->seq_mode == SNDRV_SEQ_OSS_MODE_MUSIC) {
485 ev.data.control.param =
486 MIDI_CTL_RESET_CONTROLLERS;
487 snd_seq_oss_dispatch(dp, &ev, 0, 0);
488 ev.type = SNDRV_SEQ_EVENT_PITCHBEND;
489 ev.data.control.value = 0;
490 snd_seq_oss_dispatch(dp, &ev, 0, 0);
494 // snd_seq_oss_midi_close(dp, dev);
495 snd_use_lock_free(&mdev->use_lock);
500 * get client/port of the specified MIDI device
503 snd_seq_oss_midi_get_addr(struct seq_oss_devinfo *dp, int dev, struct snd_seq_addr *addr)
505 struct seq_oss_midi *mdev;
507 if ((mdev = get_mididev(dp, dev)) == NULL)
509 addr->client = mdev->client;
510 addr->port = mdev->port;
511 snd_use_lock_free(&mdev->use_lock);
516 * input callback - this can be atomic
519 snd_seq_oss_midi_input(struct snd_seq_event *ev, int direct, void *private_data)
521 struct seq_oss_devinfo *dp = (struct seq_oss_devinfo *)private_data;
522 struct seq_oss_midi *mdev;
525 if (dp->readq == NULL)
527 if ((mdev = find_slot(ev->source.client, ev->source.port)) == NULL)
529 if (! (mdev->opened & PERM_READ)) {
530 snd_use_lock_free(&mdev->use_lock);
534 if (dp->seq_mode == SNDRV_SEQ_OSS_MODE_MUSIC)
535 rc = send_synth_event(dp, ev, mdev->seq_device);
537 rc = send_midi_event(dp, ev, mdev);
539 snd_use_lock_free(&mdev->use_lock);
544 * convert ALSA sequencer event to OSS synth event
547 send_synth_event(struct seq_oss_devinfo *dp, struct snd_seq_event *ev, int dev)
551 memset(&ossev, 0, sizeof(ossev));
554 case SNDRV_SEQ_EVENT_NOTEON:
555 ossev.v.cmd = MIDI_NOTEON; break;
556 case SNDRV_SEQ_EVENT_NOTEOFF:
557 ossev.v.cmd = MIDI_NOTEOFF; break;
558 case SNDRV_SEQ_EVENT_KEYPRESS:
559 ossev.v.cmd = MIDI_KEY_PRESSURE; break;
560 case SNDRV_SEQ_EVENT_CONTROLLER:
561 ossev.l.cmd = MIDI_CTL_CHANGE; break;
562 case SNDRV_SEQ_EVENT_PGMCHANGE:
563 ossev.l.cmd = MIDI_PGM_CHANGE; break;
564 case SNDRV_SEQ_EVENT_CHANPRESS:
565 ossev.l.cmd = MIDI_CHN_PRESSURE; break;
566 case SNDRV_SEQ_EVENT_PITCHBEND:
567 ossev.l.cmd = MIDI_PITCH_BEND; break;
569 return 0; /* not supported */
575 case SNDRV_SEQ_EVENT_NOTEON:
576 case SNDRV_SEQ_EVENT_NOTEOFF:
577 case SNDRV_SEQ_EVENT_KEYPRESS:
578 ossev.v.code = EV_CHN_VOICE;
579 ossev.v.note = ev->data.note.note;
580 ossev.v.parm = ev->data.note.velocity;
581 ossev.v.chn = ev->data.note.channel;
583 case SNDRV_SEQ_EVENT_CONTROLLER:
584 case SNDRV_SEQ_EVENT_PGMCHANGE:
585 case SNDRV_SEQ_EVENT_CHANPRESS:
586 ossev.l.code = EV_CHN_COMMON;
587 ossev.l.p1 = ev->data.control.param;
588 ossev.l.val = ev->data.control.value;
589 ossev.l.chn = ev->data.control.channel;
591 case SNDRV_SEQ_EVENT_PITCHBEND:
592 ossev.l.code = EV_CHN_COMMON;
593 ossev.l.val = ev->data.control.value + 8192;
594 ossev.l.chn = ev->data.control.channel;
598 snd_seq_oss_readq_put_timestamp(dp->readq, ev->time.tick, dp->seq_mode);
599 snd_seq_oss_readq_put_event(dp->readq, &ossev);
605 * decode event and send MIDI bytes to read queue
608 send_midi_event(struct seq_oss_devinfo *dp, struct snd_seq_event *ev, struct seq_oss_midi *mdev)
613 snd_seq_oss_readq_put_timestamp(dp->readq, ev->time.tick, dp->seq_mode);
614 if (!dp->timer->running)
615 len = snd_seq_oss_timer_start(dp->timer);
616 if (ev->type == SNDRV_SEQ_EVENT_SYSEX) {
617 snd_seq_oss_readq_sysex(dp->readq, mdev->seq_device, ev);
618 snd_midi_event_reset_decode(mdev->coder);
620 len = snd_midi_event_decode(mdev->coder, msg, sizeof(msg), ev);
622 snd_seq_oss_readq_puts(dp->readq, mdev->seq_device, msg, len);
631 * return 0 : enqueued
632 * non-zero : invalid - ignored
635 snd_seq_oss_midi_putc(struct seq_oss_devinfo *dp, int dev, unsigned char c, struct snd_seq_event *ev)
637 struct seq_oss_midi *mdev;
639 if ((mdev = get_mididev(dp, dev)) == NULL)
641 if (snd_midi_event_encode_byte(mdev->coder, c, ev)) {
642 snd_seq_oss_fill_addr(dp, ev, mdev->client, mdev->port);
643 snd_use_lock_free(&mdev->use_lock);
646 snd_use_lock_free(&mdev->use_lock);
651 * create OSS compatible midi_info record
654 snd_seq_oss_midi_make_info(struct seq_oss_devinfo *dp, int dev, struct midi_info *inf)
656 struct seq_oss_midi *mdev;
658 if ((mdev = get_mididev(dp, dev)) == NULL)
661 inf->dev_type = 0; /* FIXME: ?? */
662 inf->capabilities = 0; /* FIXME: ?? */
663 strlcpy(inf->name, mdev->name, sizeof(inf->name));
664 snd_use_lock_free(&mdev->use_lock);
669 #ifdef CONFIG_SND_PROC_FS
676 val &= PERM_READ|PERM_WRITE;
677 if (val == (PERM_READ|PERM_WRITE))
679 else if (val == PERM_READ)
681 else if (val == PERM_WRITE)
688 snd_seq_oss_midi_info_read(struct snd_info_buffer *buf)
691 struct seq_oss_midi *mdev;
693 snd_iprintf(buf, "\nNumber of MIDI devices: %d\n", max_midi_devs);
694 for (i = 0; i < max_midi_devs; i++) {
695 snd_iprintf(buf, "\nmidi %d: ", i);
698 snd_iprintf(buf, "*empty*\n");
701 snd_iprintf(buf, "[%s] ALSA port %d:%d\n", mdev->name,
702 mdev->client, mdev->port);
703 snd_iprintf(buf, " capability %s / opened %s\n",
704 capmode_str(mdev->flags),
705 capmode_str(mdev->opened));
706 snd_use_lock_free(&mdev->use_lock);
709 #endif /* CONFIG_SND_PROC_FS */