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1/*
2 * OSS compatible sequencer driver
3 *
4 * synth device handlers
5 *
6 * Copyright (C) 1998,99 Takashi Iwai <tiwai@suse.de>
7 *
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.
12 *
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.
17 *
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
21 */
22
23#include "seq_oss_synth.h"
24#include "seq_oss_midi.h"
25#include "../seq_lock.h"
26#include <linux/init.h>
27#include <linux/module.h>
28#include <linux/slab.h>
29
30/*
31 * constants
32 */
33#define SNDRV_SEQ_OSS_MAX_SYNTH_NAME 30
34#define MAX_SYSEX_BUFLEN 128
35
36
37/*
38 * definition of synth info records
39 */
40
41/* sysex buffer */
42struct seq_oss_synth_sysex {
43 int len;
44 int skip;
45 unsigned char buf[MAX_SYSEX_BUFLEN];
46};
47
48/* synth info */
49struct seq_oss_synth {
50 int seq_device;
51
52 /* for synth_info */
53 int synth_type;
54 int synth_subtype;
55 int nr_voices;
56
57 char name[SNDRV_SEQ_OSS_MAX_SYNTH_NAME];
58 struct snd_seq_oss_callback oper;
59
60 int opened;
61
62 void *private_data;
63 snd_use_lock_t use_lock;
64};
65
66
67/*
68 * device table
69 */
70static int max_synth_devs;
71static struct seq_oss_synth *synth_devs[SNDRV_SEQ_OSS_MAX_SYNTH_DEVS];
72static struct seq_oss_synth midi_synth_dev = {
73 -1, /* seq_device */
74 SYNTH_TYPE_MIDI, /* synth_type */
75 0, /* synth_subtype */
76 16, /* nr_voices */
77 "MIDI", /* name */
78};
79
80static DEFINE_SPINLOCK(register_lock);
81
82/*
83 * prototypes
84 */
85static struct seq_oss_synth *get_synthdev(struct seq_oss_devinfo *dp, int dev);
86static void reset_channels(struct seq_oss_synthinfo *info);
87
88/*
89 * global initialization
90 */
91void __init
92snd_seq_oss_synth_init(void)
93{
94 snd_use_lock_init(&midi_synth_dev.use_lock);
95}
96
97/*
98 * registration of the synth device
99 */
100int
101snd_seq_oss_synth_register(struct snd_seq_device *dev)
102{
103 int i;
104 struct seq_oss_synth *rec;
105 struct snd_seq_oss_reg *reg = SNDRV_SEQ_DEVICE_ARGPTR(dev);
106 unsigned long flags;
107
108 if ((rec = kzalloc(sizeof(*rec), GFP_KERNEL)) == NULL) {
109 snd_printk(KERN_ERR "can't malloc synth info\n");
110 return -ENOMEM;
111 }
112 rec->seq_device = -1;
113 rec->synth_type = reg->type;
114 rec->synth_subtype = reg->subtype;
115 rec->nr_voices = reg->nvoices;
116 rec->oper = reg->oper;
117 rec->private_data = reg->private_data;
118 rec->opened = 0;
119 snd_use_lock_init(&rec->use_lock);
120
121 /* copy and truncate the name of synth device */
122 strlcpy(rec->name, dev->name, sizeof(rec->name));
123
124 /* registration */
125 spin_lock_irqsave(®ister_lock, flags);
126 for (i = 0; i < max_synth_devs; i++) {
127 if (synth_devs[i] == NULL)
128 break;
129 }
130 if (i >= max_synth_devs) {
131 if (max_synth_devs >= SNDRV_SEQ_OSS_MAX_SYNTH_DEVS) {
132 spin_unlock_irqrestore(®ister_lock, flags);
133 snd_printk(KERN_ERR "no more synth slot\n");
134 kfree(rec);
135 return -ENOMEM;
136 }
137 max_synth_devs++;
138 }
139 rec->seq_device = i;
140 synth_devs[i] = rec;
141 debug_printk(("synth %s registered %d\n", rec->name, i));
142 spin_unlock_irqrestore(®ister_lock, flags);
143 dev->driver_data = rec;
144#ifdef SNDRV_OSS_INFO_DEV_SYNTH
145 if (i < SNDRV_CARDS)
146 snd_oss_info_register(SNDRV_OSS_INFO_DEV_SYNTH, i, rec->name);
147#endif
148 return 0;
149}
150
151
152int
153snd_seq_oss_synth_unregister(struct snd_seq_device *dev)
154{
155 int index;
156 struct seq_oss_synth *rec = dev->driver_data;
157 unsigned long flags;
158
159 spin_lock_irqsave(®ister_lock, flags);
160 for (index = 0; index < max_synth_devs; index++) {
161 if (synth_devs[index] == rec)
162 break;
163 }
164 if (index >= max_synth_devs) {
165 spin_unlock_irqrestore(®ister_lock, flags);
166 snd_printk(KERN_ERR "can't unregister synth\n");
167 return -EINVAL;
168 }
169 synth_devs[index] = NULL;
170 if (index == max_synth_devs - 1) {
171 for (index--; index >= 0; index--) {
172 if (synth_devs[index])
173 break;
174 }
175 max_synth_devs = index + 1;
176 }
177 spin_unlock_irqrestore(®ister_lock, flags);
178#ifdef SNDRV_OSS_INFO_DEV_SYNTH
179 if (rec->seq_device < SNDRV_CARDS)
180 snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_SYNTH, rec->seq_device);
181#endif
182
183 snd_use_lock_sync(&rec->use_lock);
184 kfree(rec);
185
186 return 0;
187}
188
189
190/*
191 */
192static struct seq_oss_synth *
193get_sdev(int dev)
194{
195 struct seq_oss_synth *rec;
196 unsigned long flags;
197
198 spin_lock_irqsave(®ister_lock, flags);
199 rec = synth_devs[dev];
200 if (rec)
201 snd_use_lock_use(&rec->use_lock);
202 spin_unlock_irqrestore(®ister_lock, flags);
203 return rec;
204}
205
206
207/*
208 * set up synth tables
209 */
210
211void
212snd_seq_oss_synth_setup(struct seq_oss_devinfo *dp)
213{
214 int i;
215 struct seq_oss_synth *rec;
216 struct seq_oss_synthinfo *info;
217
218 dp->max_synthdev = max_synth_devs;
219 dp->synth_opened = 0;
220 memset(dp->synths, 0, sizeof(dp->synths));
221 for (i = 0; i < dp->max_synthdev; i++) {
222 rec = get_sdev(i);
223 if (rec == NULL)
224 continue;
225 if (rec->oper.open == NULL || rec->oper.close == NULL) {
226 snd_use_lock_free(&rec->use_lock);
227 continue;
228 }
229 info = &dp->synths[i];
230 info->arg.app_index = dp->port;
231 info->arg.file_mode = dp->file_mode;
232 info->arg.seq_mode = dp->seq_mode;
233 if (dp->seq_mode == SNDRV_SEQ_OSS_MODE_SYNTH)
234 info->arg.event_passing = SNDRV_SEQ_OSS_PROCESS_EVENTS;
235 else
236 info->arg.event_passing = SNDRV_SEQ_OSS_PASS_EVENTS;
237 info->opened = 0;
238 if (!try_module_get(rec->oper.owner)) {
239 snd_use_lock_free(&rec->use_lock);
240 continue;
241 }
242 if (rec->oper.open(&info->arg, rec->private_data) < 0) {
243 module_put(rec->oper.owner);
244 snd_use_lock_free(&rec->use_lock);
245 continue;
246 }
247 info->nr_voices = rec->nr_voices;
248 if (info->nr_voices > 0) {
249 info->ch = kcalloc(info->nr_voices, sizeof(struct seq_oss_chinfo), GFP_KERNEL);
250 if (!info->ch) {
251 snd_printk(KERN_ERR "Cannot malloc\n");
252 rec->oper.close(&info->arg);
253 module_put(rec->oper.owner);
254 snd_use_lock_free(&rec->use_lock);
255 continue;
256 }
257 reset_channels(info);
258 }
259 debug_printk(("synth %d assigned\n", i));
260 info->opened++;
261 rec->opened++;
262 dp->synth_opened++;
263 snd_use_lock_free(&rec->use_lock);
264 }
265}
266
267
268/*
269 * set up synth tables for MIDI emulation - /dev/music mode only
270 */
271
272void
273snd_seq_oss_synth_setup_midi(struct seq_oss_devinfo *dp)
274{
275 int i;
276
277 if (dp->max_synthdev >= SNDRV_SEQ_OSS_MAX_SYNTH_DEVS)
278 return;
279
280 for (i = 0; i < dp->max_mididev; i++) {
281 struct seq_oss_synthinfo *info;
282 info = &dp->synths[dp->max_synthdev];
283 if (snd_seq_oss_midi_open(dp, i, dp->file_mode) < 0)
284 continue;
285 info->arg.app_index = dp->port;
286 info->arg.file_mode = dp->file_mode;
287 info->arg.seq_mode = dp->seq_mode;
288 info->arg.private_data = info;
289 info->is_midi = 1;
290 info->midi_mapped = i;
291 info->arg.event_passing = SNDRV_SEQ_OSS_PASS_EVENTS;
292 snd_seq_oss_midi_get_addr(dp, i, &info->arg.addr);
293 info->opened = 1;
294 midi_synth_dev.opened++;
295 dp->max_synthdev++;
296 if (dp->max_synthdev >= SNDRV_SEQ_OSS_MAX_SYNTH_DEVS)
297 break;
298 }
299}
300
301
302/*
303 * clean up synth tables
304 */
305
306void
307snd_seq_oss_synth_cleanup(struct seq_oss_devinfo *dp)
308{
309 int i;
310 struct seq_oss_synth *rec;
311 struct seq_oss_synthinfo *info;
312
313 if (snd_BUG_ON(dp->max_synthdev >= SNDRV_SEQ_OSS_MAX_SYNTH_DEVS))
314 return;
315 for (i = 0; i < dp->max_synthdev; i++) {
316 info = &dp->synths[i];
317 if (! info->opened)
318 continue;
319 if (info->is_midi) {
320 if (midi_synth_dev.opened > 0) {
321 snd_seq_oss_midi_close(dp, info->midi_mapped);
322 midi_synth_dev.opened--;
323 }
324 } else {
325 rec = get_sdev(i);
326 if (rec == NULL)
327 continue;
328 if (rec->opened > 0) {
329 debug_printk(("synth %d closed\n", i));
330 rec->oper.close(&info->arg);
331 module_put(rec->oper.owner);
332 rec->opened = 0;
333 }
334 snd_use_lock_free(&rec->use_lock);
335 }
336 kfree(info->sysex);
337 info->sysex = NULL;
338 kfree(info->ch);
339 info->ch = NULL;
340 }
341 dp->synth_opened = 0;
342 dp->max_synthdev = 0;
343}
344
345/*
346 * check if the specified device is MIDI mapped device
347 */
348static int
349is_midi_dev(struct seq_oss_devinfo *dp, int dev)
350{
351 if (dev < 0 || dev >= dp->max_synthdev)
352 return 0;
353 if (dp->synths[dev].is_midi)
354 return 1;
355 return 0;
356}
357
358/*
359 * return synth device information pointer
360 */
361static struct seq_oss_synth *
362get_synthdev(struct seq_oss_devinfo *dp, int dev)
363{
364 struct seq_oss_synth *rec;
365 if (dev < 0 || dev >= dp->max_synthdev)
366 return NULL;
367 if (! dp->synths[dev].opened)
368 return NULL;
369 if (dp->synths[dev].is_midi)
370 return &midi_synth_dev;
371 if ((rec = get_sdev(dev)) == NULL)
372 return NULL;
373 if (! rec->opened) {
374 snd_use_lock_free(&rec->use_lock);
375 return NULL;
376 }
377 return rec;
378}
379
380
381/*
382 * reset note and velocity on each channel.
383 */
384static void
385reset_channels(struct seq_oss_synthinfo *info)
386{
387 int i;
388 if (info->ch == NULL || ! info->nr_voices)
389 return;
390 for (i = 0; i < info->nr_voices; i++) {
391 info->ch[i].note = -1;
392 info->ch[i].vel = 0;
393 }
394}
395
396
397/*
398 * reset synth device:
399 * call reset callback. if no callback is defined, send a heartbeat
400 * event to the corresponding port.
401 */
402void
403snd_seq_oss_synth_reset(struct seq_oss_devinfo *dp, int dev)
404{
405 struct seq_oss_synth *rec;
406 struct seq_oss_synthinfo *info;
407
408 if (snd_BUG_ON(dev < 0 || dev >= dp->max_synthdev))
409 return;
410 info = &dp->synths[dev];
411 if (! info->opened)
412 return;
413 if (info->sysex)
414 info->sysex->len = 0; /* reset sysex */
415 reset_channels(info);
416 if (info->is_midi) {
417 if (midi_synth_dev.opened <= 0)
418 return;
419 snd_seq_oss_midi_reset(dp, info->midi_mapped);
420 /* reopen the device */
421 snd_seq_oss_midi_close(dp, dev);
422 if (snd_seq_oss_midi_open(dp, info->midi_mapped,
423 dp->file_mode) < 0) {
424 midi_synth_dev.opened--;
425 info->opened = 0;
426 kfree(info->sysex);
427 info->sysex = NULL;
428 kfree(info->ch);
429 info->ch = NULL;
430 }
431 return;
432 }
433
434 rec = get_sdev(dev);
435 if (rec == NULL)
436 return;
437 if (rec->oper.reset) {
438 rec->oper.reset(&info->arg);
439 } else {
440 struct snd_seq_event ev;
441 memset(&ev, 0, sizeof(ev));
442 snd_seq_oss_fill_addr(dp, &ev, info->arg.addr.client,
443 info->arg.addr.port);
444 ev.type = SNDRV_SEQ_EVENT_RESET;
445 snd_seq_oss_dispatch(dp, &ev, 0, 0);
446 }
447 snd_use_lock_free(&rec->use_lock);
448}
449
450
451/*
452 * load a patch record:
453 * call load_patch callback function
454 */
455int
456snd_seq_oss_synth_load_patch(struct seq_oss_devinfo *dp, int dev, int fmt,
457 const char __user *buf, int p, int c)
458{
459 struct seq_oss_synth *rec;
460 int rc;
461
462 if (dev < 0 || dev >= dp->max_synthdev)
463 return -ENXIO;
464
465 if (is_midi_dev(dp, dev))
466 return 0;
467 if ((rec = get_synthdev(dp, dev)) == NULL)
468 return -ENXIO;
469
470 if (rec->oper.load_patch == NULL)
471 rc = -ENXIO;
472 else
473 rc = rec->oper.load_patch(&dp->synths[dev].arg, fmt, buf, p, c);
474 snd_use_lock_free(&rec->use_lock);
475 return rc;
476}
477
478/*
479 * check if the device is valid synth device
480 */
481int
482snd_seq_oss_synth_is_valid(struct seq_oss_devinfo *dp, int dev)
483{
484 struct seq_oss_synth *rec;
485 rec = get_synthdev(dp, dev);
486 if (rec) {
487 snd_use_lock_free(&rec->use_lock);
488 return 1;
489 }
490 return 0;
491}
492
493
494/*
495 * receive OSS 6 byte sysex packet:
496 * the full sysex message will be sent if it reaches to the end of data
497 * (0xff).
498 */
499int
500snd_seq_oss_synth_sysex(struct seq_oss_devinfo *dp, int dev, unsigned char *buf, struct snd_seq_event *ev)
501{
502 int i, send;
503 unsigned char *dest;
504 struct seq_oss_synth_sysex *sysex;
505
506 if (! snd_seq_oss_synth_is_valid(dp, dev))
507 return -ENXIO;
508
509 sysex = dp->synths[dev].sysex;
510 if (sysex == NULL) {
511 sysex = kzalloc(sizeof(*sysex), GFP_KERNEL);
512 if (sysex == NULL)
513 return -ENOMEM;
514 dp->synths[dev].sysex = sysex;
515 }
516
517 send = 0;
518 dest = sysex->buf + sysex->len;
519 /* copy 6 byte packet to the buffer */
520 for (i = 0; i < 6; i++) {
521 if (buf[i] == 0xff) {
522 send = 1;
523 break;
524 }
525 dest[i] = buf[i];
526 sysex->len++;
527 if (sysex->len >= MAX_SYSEX_BUFLEN) {
528 sysex->len = 0;
529 sysex->skip = 1;
530 break;
531 }
532 }
533
534 if (sysex->len && send) {
535 if (sysex->skip) {
536 sysex->skip = 0;
537 sysex->len = 0;
538 return -EINVAL; /* skip */
539 }
540 /* copy the data to event record and send it */
541 ev->flags = SNDRV_SEQ_EVENT_LENGTH_VARIABLE;
542 if (snd_seq_oss_synth_addr(dp, dev, ev))
543 return -EINVAL;
544 ev->data.ext.len = sysex->len;
545 ev->data.ext.ptr = sysex->buf;
546 sysex->len = 0;
547 return 0;
548 }
549
550 return -EINVAL; /* skip */
551}
552
553/*
554 * fill the event source/destination addresses
555 */
556int
557snd_seq_oss_synth_addr(struct seq_oss_devinfo *dp, int dev, struct snd_seq_event *ev)
558{
559 if (! snd_seq_oss_synth_is_valid(dp, dev))
560 return -EINVAL;
561 snd_seq_oss_fill_addr(dp, ev, dp->synths[dev].arg.addr.client,
562 dp->synths[dev].arg.addr.port);
563 return 0;
564}
565
566
567/*
568 * OSS compatible ioctl
569 */
570int
571snd_seq_oss_synth_ioctl(struct seq_oss_devinfo *dp, int dev, unsigned int cmd, unsigned long addr)
572{
573 struct seq_oss_synth *rec;
574 int rc;
575
576 if (is_midi_dev(dp, dev))
577 return -ENXIO;
578 if ((rec = get_synthdev(dp, dev)) == NULL)
579 return -ENXIO;
580 if (rec->oper.ioctl == NULL)
581 rc = -ENXIO;
582 else
583 rc = rec->oper.ioctl(&dp->synths[dev].arg, cmd, addr);
584 snd_use_lock_free(&rec->use_lock);
585 return rc;
586}
587
588
589/*
590 * send OSS raw events - SEQ_PRIVATE and SEQ_VOLUME
591 */
592int
593snd_seq_oss_synth_raw_event(struct seq_oss_devinfo *dp, int dev, unsigned char *data, struct snd_seq_event *ev)
594{
595 if (! snd_seq_oss_synth_is_valid(dp, dev) || is_midi_dev(dp, dev))
596 return -ENXIO;
597 ev->type = SNDRV_SEQ_EVENT_OSS;
598 memcpy(ev->data.raw8.d, data, 8);
599 return snd_seq_oss_synth_addr(dp, dev, ev);
600}
601
602
603/*
604 * create OSS compatible synth_info record
605 */
606int
607snd_seq_oss_synth_make_info(struct seq_oss_devinfo *dp, int dev, struct synth_info *inf)
608{
609 struct seq_oss_synth *rec;
610
611 if (dev < 0 || dev >= dp->max_synthdev)
612 return -ENXIO;
613
614 if (dp->synths[dev].is_midi) {
615 struct midi_info minf;
616 snd_seq_oss_midi_make_info(dp, dp->synths[dev].midi_mapped, &minf);
617 inf->synth_type = SYNTH_TYPE_MIDI;
618 inf->synth_subtype = 0;
619 inf->nr_voices = 16;
620 inf->device = dev;
621 strlcpy(inf->name, minf.name, sizeof(inf->name));
622 } else {
623 if ((rec = get_synthdev(dp, dev)) == NULL)
624 return -ENXIO;
625 inf->synth_type = rec->synth_type;
626 inf->synth_subtype = rec->synth_subtype;
627 inf->nr_voices = rec->nr_voices;
628 inf->device = dev;
629 strlcpy(inf->name, rec->name, sizeof(inf->name));
630 snd_use_lock_free(&rec->use_lock);
631 }
632 return 0;
633}
634
635
636#ifdef CONFIG_PROC_FS
637/*
638 * proc interface
639 */
640void
641snd_seq_oss_synth_info_read(struct snd_info_buffer *buf)
642{
643 int i;
644 struct seq_oss_synth *rec;
645
646 snd_iprintf(buf, "\nNumber of synth devices: %d\n", max_synth_devs);
647 for (i = 0; i < max_synth_devs; i++) {
648 snd_iprintf(buf, "\nsynth %d: ", i);
649 rec = get_sdev(i);
650 if (rec == NULL) {
651 snd_iprintf(buf, "*empty*\n");
652 continue;
653 }
654 snd_iprintf(buf, "[%s]\n", rec->name);
655 snd_iprintf(buf, " type 0x%x : subtype 0x%x : voices %d\n",
656 rec->synth_type, rec->synth_subtype,
657 rec->nr_voices);
658 snd_iprintf(buf, " capabilities : ioctl %s / load_patch %s\n",
659 enabled_str((long)rec->oper.ioctl),
660 enabled_str((long)rec->oper.load_patch));
661 snd_use_lock_free(&rec->use_lock);
662 }
663}
664#endif /* CONFIG_PROC_FS */