sound/core/seq/oss/seq_oss_synth.c

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