sound/core/seq/oss/seq_oss_midi.c

   1 /*
   2  * OSS compatible sequencer driver
   3  *
   4  * MIDI 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 <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
  33
  34 /*
  35  * constants
  36  */
  37 #define SNDRV_SEQ_OSS_MAX_MIDI_NAME     30
  38
  39 /*
  40  * definition of midi device record
  41  */
  42 struct seq_oss_midi {
  43         int seq_device;         /* device number */
  44         int client;             /* sequencer client number */
  45         int port;               /* sequencer port number */
  46         unsigned int flags;     /* port capability */
  47         int opened;             /* flag for opening */
  48         unsigned char name[SNDRV_SEQ_OSS_MAX_MIDI_NAME];
  49         struct snd_midi_event *coder;   /* MIDI event coder */
  50         struct seq_oss_devinfo *devinfo;        /* assigned OSSseq device */
  51         snd_use_lock_t use_lock;
  52 };
  53
  54
  55 /*
  56  * midi device table
  57  */
  58 static int max_midi_devs;
  59 static struct seq_oss_midi *midi_devs[SNDRV_SEQ_OSS_MAX_MIDI_DEVS];
  60
  61 static DEFINE_SPINLOCK(register_lock);
  62
  63 /*
  64  * prototypes
  65  */
  66 static struct seq_oss_midi *get_mdev(int dev);
  67 static struct seq_oss_midi *get_mididev(struct seq_oss_devinfo *dp, int dev);
  68 static int send_synth_event(struct seq_oss_devinfo *dp, struct snd_seq_event *ev, int dev);
  69 static int send_midi_event(struct seq_oss_devinfo *dp, struct snd_seq_event *ev, struct seq_oss_midi *mdev);
  70
  71 /*
  72  * look up the existing ports
  73  * this looks a very exhausting job.
  74  */
  75 int __init
  76 snd_seq_oss_midi_lookup_ports(int client)
  77 {
  78         struct snd_seq_client_info *clinfo;
  79         struct snd_seq_port_info *pinfo;
  80
  81         clinfo = kzalloc(sizeof(*clinfo), GFP_KERNEL);
  82         pinfo = kzalloc(sizeof(*pinfo), GFP_KERNEL);
  83         if (! clinfo || ! pinfo) {
  84                 kfree(clinfo);
  85                 kfree(pinfo);
  86                 return -ENOMEM;
  87         }
  88         clinfo->client = -1;
  89         while (snd_seq_kernel_client_ctl(client, SNDRV_SEQ_IOCTL_QUERY_NEXT_CLIENT, clinfo) == 0) {
  90                 if (clinfo->client == client)
  91                         continue; /* ignore myself */
  92                 pinfo->addr.client = clinfo->client;
  93                 pinfo->addr.port = -1;
  94                 while (snd_seq_kernel_client_ctl(client, SNDRV_SEQ_IOCTL_QUERY_NEXT_PORT, pinfo) == 0)
  95                         snd_seq_oss_midi_check_new_port(pinfo);
  96         }
  97         kfree(clinfo);
  98         kfree(pinfo);
  99         return 0;
 100 }
 101
 102
 103 /*
 104  */
 105 static struct seq_oss_midi *
 106 get_mdev(int dev)
 107 {
 108         struct seq_oss_midi *mdev;
 109         unsigned long flags;
 110
 111         spin_lock_irqsave(&register_lock, flags);
 112         mdev = midi_devs[dev];
 113         if (mdev)
 114                 snd_use_lock_use(&mdev->use_lock);
 115         spin_unlock_irqrestore(&register_lock, flags);
 116         return mdev;
 117 }
 118
 119 /*
 120  * look for the identical slot
 121  */
 122 static struct seq_oss_midi *
 123 find_slot(int client, int port)
 124 {
 125         int i;
 126         struct seq_oss_midi *mdev;
 127         unsigned long flags;
 128
 129         spin_lock_irqsave(&register_lock, flags);
 130         for (i = 0; i < max_midi_devs; i++) {
 131                 mdev = midi_devs[i];
 132                 if (mdev && mdev->client == client && mdev->port == port) {
 133                         /* found! */
 134                         snd_use_lock_use(&mdev->use_lock);
 135                         spin_unlock_irqrestore(&register_lock, flags);
 136                         return mdev;
 137                 }
 138         }
 139         spin_unlock_irqrestore(&register_lock, flags);
 140         return NULL;
 141 }
 142
 143
 144 #define PERM_WRITE (SNDRV_SEQ_PORT_CAP_WRITE|SNDRV_SEQ_PORT_CAP_SUBS_WRITE)
 145 #define PERM_READ (SNDRV_SEQ_PORT_CAP_READ|SNDRV_SEQ_PORT_CAP_SUBS_READ)
 146 /*
 147  * register a new port if it doesn't exist yet
 148  */
 149 int
 150 snd_seq_oss_midi_check_new_port(struct snd_seq_port_info *pinfo)
 151 {
 152         int i;
 153         struct seq_oss_midi *mdev;
 154         unsigned long flags;
 155
 156         debug_printk(("check for MIDI client %d port %d\n", pinfo->addr.client, pinfo->addr.port));
 157         /* the port must include generic midi */
 158         if (! (pinfo->type & SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC))
 159                 return 0;
 160         /* either read or write subscribable */
 161         if ((pinfo->capability & PERM_WRITE) != PERM_WRITE &&
 162             (pinfo->capability & PERM_READ) != PERM_READ)
 163                 return 0;
 164
 165         /*
 166          * look for the identical slot
 167          */
 168         if ((mdev = find_slot(pinfo->addr.client, pinfo->addr.port)) != NULL) {
 169                 /* already exists */
 170                 snd_use_lock_free(&mdev->use_lock);
 171                 return 0;
 172         }
 173
 174         /*
 175          * allocate midi info record
 176          */
 177         if ((mdev = kzalloc(sizeof(*mdev), GFP_KERNEL)) == NULL) {
 178                 snd_printk(KERN_ERR "can't malloc midi info\n");
 179                 return -ENOMEM;
 180         }
 181
 182         /* copy the port information */
 183         mdev->client = pinfo->addr.client;
 184         mdev->port = pinfo->addr.port;
 185         mdev->flags = pinfo->capability;
 186         mdev->opened = 0;
 187         snd_use_lock_init(&mdev->use_lock);
 188
 189         /* copy and truncate the name of synth device */
 190         strlcpy(mdev->name, pinfo->name, sizeof(mdev->name));
 191
 192         /* create MIDI coder */
 193         if (snd_midi_event_new(MAX_MIDI_EVENT_BUF, &mdev->coder) < 0) {
 194                 snd_printk(KERN_ERR "can't malloc midi coder\n");
 195                 kfree(mdev);
 196                 return -ENOMEM;
 197         }
 198         /* OSS sequencer adds running status to all sequences */
 199         snd_midi_event_no_status(mdev->coder, 1);
 200
 201         /*
 202          * look for en empty slot
 203          */
 204         spin_lock_irqsave(&register_lock, flags);
 205         for (i = 0; i < max_midi_devs; i++) {
 206                 if (midi_devs[i] == NULL)
 207                         break;
 208         }
 209         if (i >= max_midi_devs) {
 210                 if (max_midi_devs >= SNDRV_SEQ_OSS_MAX_MIDI_DEVS) {
 211                         spin_unlock_irqrestore(&register_lock, flags);
 212                         snd_midi_event_free(mdev->coder);
 213                         kfree(mdev);
 214                         return -ENOMEM;
 215                 }
 216                 max_midi_devs++;
 217         }
 218         mdev->seq_device = i;
 219         midi_devs[mdev->seq_device] = mdev;
 220         spin_unlock_irqrestore(&register_lock, flags);
 221
 222         return 0;
 223 }
 224
 225 /*
 226  * release the midi device if it was registered
 227  */
 228 int
 229 snd_seq_oss_midi_check_exit_port(int client, int port)
 230 {
 231         struct seq_oss_midi *mdev;
 232         unsigned long flags;
 233         int index;
 234
 235         if ((mdev = find_slot(client, port)) != NULL) {
 236                 spin_lock_irqsave(&register_lock, flags);
 237                 midi_devs[mdev->seq_device] = NULL;
 238                 spin_unlock_irqrestore(&register_lock, flags);
 239                 snd_use_lock_free(&mdev->use_lock);
 240                 snd_use_lock_sync(&mdev->use_lock);
 241                 if (mdev->coder)
 242                         snd_midi_event_free(mdev->coder);
 243                 kfree(mdev);
 244         }
 245         spin_lock_irqsave(&register_lock, flags);
 246         for (index = max_midi_devs - 1; index >= 0; index--) {
 247                 if (midi_devs[index])
 248                         break;
 249         }
 250         max_midi_devs = index + 1;
 251         spin_unlock_irqrestore(&register_lock, flags);
 252         return 0;
 253 }
 254
 255
 256 /*
 257  * release the midi device if it was registered
 258  */
 259 void
 260 snd_seq_oss_midi_clear_all(void)
 261 {
 262         int i;
 263         struct seq_oss_midi *mdev;
 264         unsigned long flags;
 265
 266         spin_lock_irqsave(&register_lock, flags);
 267         for (i = 0; i < max_midi_devs; i++) {
 268                 if ((mdev = midi_devs[i]) != NULL) {
 269                         if (mdev->coder)
 270                                 snd_midi_event_free(mdev->coder);
 271                         kfree(mdev);
 272                         midi_devs[i] = NULL;
 273                 }
 274         }
 275         max_midi_devs = 0;
 276         spin_unlock_irqrestore(&register_lock, flags);
 277 }
 278
 279
 280 /*
 281  * set up midi tables
 282  */
 283 void
 284 snd_seq_oss_midi_setup(struct seq_oss_devinfo *dp)
 285 {
 286         dp->max_mididev = max_midi_devs;
 287 }
 288
 289 /*
 290  * clean up midi tables
 291  */
 292 void
 293 snd_seq_oss_midi_cleanup(struct seq_oss_devinfo *dp)
 294 {
 295         int i;
 296         for (i = 0; i < dp->max_mididev; i++)
 297                 snd_seq_oss_midi_close(dp, i);
 298         dp->max_mididev = 0;
 299 }
 300
 301
 302 /*
 303  * open all midi devices.  ignore errors.
 304  */
 305 void
 306 snd_seq_oss_midi_open_all(struct seq_oss_devinfo *dp, int file_mode)
 307 {
 308         int i;
 309         for (i = 0; i < dp->max_mididev; i++)
 310                 snd_seq_oss_midi_open(dp, i, file_mode);
 311 }
 312
 313
 314 /*
 315  * get the midi device information
 316  */
 317 static struct seq_oss_midi *
 318 get_mididev(struct seq_oss_devinfo *dp, int dev)
 319 {
 320         if (dev < 0 || dev >= dp->max_mididev)
 321                 return NULL;
 322         return get_mdev(dev);
 323 }
 324
 325
 326 /*
 327  * open the midi device if not opened yet
 328  */
 329 int
 330 snd_seq_oss_midi_open(struct seq_oss_devinfo *dp, int dev, int fmode)
 331 {
 332         int perm;
 333         struct seq_oss_midi *mdev;
 334         struct snd_seq_port_subscribe subs;
 335
 336         if ((mdev = get_mididev(dp, dev)) == NULL)
 337                 return -ENODEV;
 338
 339         /* already used? */
 340         if (mdev->opened && mdev->devinfo != dp) {
 341                 snd_use_lock_free(&mdev->use_lock);
 342                 return -EBUSY;
 343         }
 344
 345         perm = 0;
 346         if (is_write_mode(fmode))
 347                 perm |= PERM_WRITE;
 348         if (is_read_mode(fmode))
 349                 perm |= PERM_READ;
 350         perm &= mdev->flags;
 351         if (perm == 0) {
 352                 snd_use_lock_free(&mdev->use_lock);
 353                 return -ENXIO;
 354         }
 355
 356         /* already opened? */
 357         if ((mdev->opened & perm) == perm) {
 358                 snd_use_lock_free(&mdev->use_lock);
 359                 return 0;
 360         }
 361
 362         perm &= ~mdev->opened;
 363
 364         memset(&subs, 0, sizeof(subs));
 365
 366         if (perm & PERM_WRITE) {
 367                 subs.sender = dp->addr;
 368                 subs.dest.client = mdev->client;
 369                 subs.dest.port = mdev->port;
 370                 if (snd_seq_kernel_client_ctl(dp->cseq, SNDRV_SEQ_IOCTL_SUBSCRIBE_PORT, &subs) >= 0)
 371                         mdev->opened |= PERM_WRITE;
 372         }
 373         if (perm & PERM_READ) {
 374                 subs.sender.client = mdev->client;
 375                 subs.sender.port = mdev->port;
 376                 subs.dest = dp->addr;
 377                 subs.flags = SNDRV_SEQ_PORT_SUBS_TIMESTAMP;
 378                 subs.queue = dp->queue;         /* queue for timestamps */
 379                 if (snd_seq_kernel_client_ctl(dp->cseq, SNDRV_SEQ_IOCTL_SUBSCRIBE_PORT, &subs) >= 0)
 380                         mdev->opened |= PERM_READ;
 381         }
 382
 383         if (! mdev->opened) {
 384                 snd_use_lock_free(&mdev->use_lock);
 385                 return -ENXIO;
 386         }
 387
 388         mdev->devinfo = dp;
 389         snd_use_lock_free(&mdev->use_lock);
 390         return 0;
 391 }
 392
 393 /*
 394  * close the midi device if already opened
 395  */
 396 int
 397 snd_seq_oss_midi_close(struct seq_oss_devinfo *dp, int dev)
 398 {
 399         struct seq_oss_midi *mdev;
 400         struct snd_seq_port_subscribe subs;
 401
 402         if ((mdev = get_mididev(dp, dev)) == NULL)
 403                 return -ENODEV;
 404         if (! mdev->opened || mdev->devinfo != dp) {
 405                 snd_use_lock_free(&mdev->use_lock);
 406                 return 0;
 407         }
 408
 409         debug_printk(("closing client %d port %d mode %d\n", mdev->client, mdev->port, mdev->opened));
 410         memset(&subs, 0, sizeof(subs));
 411         if (mdev->opened & PERM_WRITE) {
 412                 subs.sender = dp->addr;
 413                 subs.dest.client = mdev->client;
 414                 subs.dest.port = mdev->port;
 415                 snd_seq_kernel_client_ctl(dp->cseq, SNDRV_SEQ_IOCTL_UNSUBSCRIBE_PORT, &subs);
 416         }
 417         if (mdev->opened & PERM_READ) {
 418                 subs.sender.client = mdev->client;
 419                 subs.sender.port = mdev->port;
 420                 subs.dest = dp->addr;
 421                 snd_seq_kernel_client_ctl(dp->cseq, SNDRV_SEQ_IOCTL_UNSUBSCRIBE_PORT, &subs);
 422         }
 423
 424         mdev->opened = 0;
 425         mdev->devinfo = NULL;
 426
 427         snd_use_lock_free(&mdev->use_lock);
 428         return 0;
 429 }
 430
 431 /*
 432  * change seq capability flags to file mode flags
 433  */
 434 int
 435 snd_seq_oss_midi_filemode(struct seq_oss_devinfo *dp, int dev)
 436 {
 437         struct seq_oss_midi *mdev;
 438         int mode;
 439
 440         if ((mdev = get_mididev(dp, dev)) == NULL)
 441                 return 0;
 442
 443         mode = 0;
 444         if (mdev->opened & PERM_WRITE)
 445                 mode |= SNDRV_SEQ_OSS_FILE_WRITE;
 446         if (mdev->opened & PERM_READ)
 447                 mode |= SNDRV_SEQ_OSS_FILE_READ;
 448
 449         snd_use_lock_free(&mdev->use_lock);
 450         return mode;
 451 }
 452
 453 /*
 454  * reset the midi device and close it:
 455  * so far, only close the device.
 456  */
 457 void
 458 snd_seq_oss_midi_reset(struct seq_oss_devinfo *dp, int dev)
 459 {
 460         struct seq_oss_midi *mdev;
 461
 462         if ((mdev = get_mididev(dp, dev)) == NULL)
 463                 return;
 464         if (! mdev->opened) {
 465                 snd_use_lock_free(&mdev->use_lock);
 466                 return;
 467         }
 468
 469         if (mdev->opened & PERM_WRITE) {
 470                 struct snd_seq_event ev;
 471                 int c;
 472
 473                 debug_printk(("resetting client %d port %d\n", mdev->client, mdev->port));
 474                 memset(&ev, 0, sizeof(ev));
 475                 ev.dest.client = mdev->client;
 476                 ev.dest.port = mdev->port;
 477                 ev.queue = dp->queue;
 478                 ev.source.port = dp->port;
 479                 if (dp->seq_mode == SNDRV_SEQ_OSS_MODE_SYNTH) {
 480                         ev.type = SNDRV_SEQ_EVENT_SENSING;
 481                         snd_seq_oss_dispatch(dp, &ev, 0, 0);
 482                 }
 483                 for (c = 0; c < 16; c++) {
 484                         ev.type = SNDRV_SEQ_EVENT_CONTROLLER;
 485                         ev.data.control.channel = c;
 486                         ev.data.control.param = MIDI_CTL_ALL_NOTES_OFF;
 487                         snd_seq_oss_dispatch(dp, &ev, 0, 0);
 488                         if (dp->seq_mode == SNDRV_SEQ_OSS_MODE_MUSIC) {
 489                                 ev.data.control.param =
 490                                         MIDI_CTL_RESET_CONTROLLERS;
 491                                 snd_seq_oss_dispatch(dp, &ev, 0, 0);
 492                                 ev.type = SNDRV_SEQ_EVENT_PITCHBEND;
 493                                 ev.data.control.value = 0;
 494                                 snd_seq_oss_dispatch(dp, &ev, 0, 0);
 495                         }
 496                 }
 497         }
 498         // snd_seq_oss_midi_close(dp, dev);
 499         snd_use_lock_free(&mdev->use_lock);
 500 }
 501
 502
 503 /*
 504  * get client/port of the specified MIDI device
 505  */
 506 void
 507 snd_seq_oss_midi_get_addr(struct seq_oss_devinfo *dp, int dev, struct snd_seq_addr *addr)
 508 {
 509         struct seq_oss_midi *mdev;
 510
 511         if ((mdev = get_mididev(dp, dev)) == NULL)
 512                 return;
 513         addr->client = mdev->client;
 514         addr->port = mdev->port;
 515         snd_use_lock_free(&mdev->use_lock);
 516 }
 517
 518
 519 /*
 520  * input callback - this can be atomic
 521  */
 522 int
 523 snd_seq_oss_midi_input(struct snd_seq_event *ev, int direct, void *private_data)
 524 {
 525         struct seq_oss_devinfo *dp = (struct seq_oss_devinfo *)private_data;
 526         struct seq_oss_midi *mdev;
 527         int rc;
 528
 529         if (dp->readq == NULL)
 530                 return 0;
 531         if ((mdev = find_slot(ev->source.client, ev->source.port)) == NULL)
 532                 return 0;
 533         if (! (mdev->opened & PERM_READ)) {
 534                 snd_use_lock_free(&mdev->use_lock);
 535                 return 0;
 536         }
 537
 538         if (dp->seq_mode == SNDRV_SEQ_OSS_MODE_MUSIC)
 539                 rc = send_synth_event(dp, ev, mdev->seq_device);
 540         else
 541                 rc = send_midi_event(dp, ev, mdev);
 542
 543         snd_use_lock_free(&mdev->use_lock);
 544         return rc;
 545 }
 546
 547 /*
 548  * convert ALSA sequencer event to OSS synth event
 549  */
 550 static int
 551 send_synth_event(struct seq_oss_devinfo *dp, struct snd_seq_event *ev, int dev)
 552 {
 553         union evrec ossev;
 554
 555         memset(&ossev, 0, sizeof(ossev));
 556
 557         switch (ev->type) {
 558         case SNDRV_SEQ_EVENT_NOTEON:
 559                 ossev.v.cmd = MIDI_NOTEON; break;
 560         case SNDRV_SEQ_EVENT_NOTEOFF:
 561                 ossev.v.cmd = MIDI_NOTEOFF; break;
 562         case SNDRV_SEQ_EVENT_KEYPRESS:
 563                 ossev.v.cmd = MIDI_KEY_PRESSURE; break;
 564         case SNDRV_SEQ_EVENT_CONTROLLER:
 565                 ossev.l.cmd = MIDI_CTL_CHANGE; break;
 566         case SNDRV_SEQ_EVENT_PGMCHANGE:
 567                 ossev.l.cmd = MIDI_PGM_CHANGE; break;
 568         case SNDRV_SEQ_EVENT_CHANPRESS:
 569                 ossev.l.cmd = MIDI_CHN_PRESSURE; break;
 570         case SNDRV_SEQ_EVENT_PITCHBEND:
 571                 ossev.l.cmd = MIDI_PITCH_BEND; break;
 572         default:
 573                 return 0; /* not supported */
 574         }
 575
 576         ossev.v.dev = dev;
 577
 578         switch (ev->type) {
 579         case SNDRV_SEQ_EVENT_NOTEON:
 580         case SNDRV_SEQ_EVENT_NOTEOFF:
 581         case SNDRV_SEQ_EVENT_KEYPRESS:
 582                 ossev.v.code = EV_CHN_VOICE;
 583                 ossev.v.note = ev->data.note.note;
 584                 ossev.v.parm = ev->data.note.velocity;
 585                 ossev.v.chn = ev->data.note.channel;
 586                 break;
 587         case SNDRV_SEQ_EVENT_CONTROLLER:
 588         case SNDRV_SEQ_EVENT_PGMCHANGE:
 589         case SNDRV_SEQ_EVENT_CHANPRESS:
 590                 ossev.l.code = EV_CHN_COMMON;
 591                 ossev.l.p1 = ev->data.control.param;
 592                 ossev.l.val = ev->data.control.value;
 593                 ossev.l.chn = ev->data.control.channel;
 594                 break;
 595         case SNDRV_SEQ_EVENT_PITCHBEND:
 596                 ossev.l.code = EV_CHN_COMMON;
 597                 ossev.l.val = ev->data.control.value + 8192;
 598                 ossev.l.chn = ev->data.control.channel;
 599                 break;
 600         }
 601
 602         snd_seq_oss_readq_put_timestamp(dp->readq, ev->time.tick, dp->seq_mode);
 603         snd_seq_oss_readq_put_event(dp->readq, &ossev);
 604
 605         return 0;
 606 }
 607
 608 /*
 609  * decode event and send MIDI bytes to read queue
 610  */
 611 static int
 612 send_midi_event(struct seq_oss_devinfo *dp, struct snd_seq_event *ev, struct seq_oss_midi *mdev)
 613 {
 614         char msg[32];
 615         int len;
 616
 617         snd_seq_oss_readq_put_timestamp(dp->readq, ev->time.tick, dp->seq_mode);
 618         if (!dp->timer->running)
 619                 len = snd_seq_oss_timer_start(dp->timer);
 620         if (ev->type == SNDRV_SEQ_EVENT_SYSEX) {
 621                 if ((ev->flags & SNDRV_SEQ_EVENT_LENGTH_MASK) == SNDRV_SEQ_EVENT_LENGTH_VARIABLE)
 622                         snd_seq_oss_readq_puts(dp->readq, mdev->seq_device,
 623                                                ev->data.ext.ptr, ev->data.ext.len);
 624         } else {
 625                 len = snd_midi_event_decode(mdev->coder, msg, sizeof(msg), ev);
 626                 if (len > 0)
 627                         snd_seq_oss_readq_puts(dp->readq, mdev->seq_device, msg, len);
 628         }
 629
 630         return 0;
 631 }
 632
 633
 634 /*
 635  * dump midi data
 636  * return 0 : enqueued
 637  *        non-zero : invalid - ignored
 638  */
 639 int
 640 snd_seq_oss_midi_putc(struct seq_oss_devinfo *dp, int dev, unsigned char c, struct snd_seq_event *ev)
 641 {
 642         struct seq_oss_midi *mdev;
 643
 644         if ((mdev = get_mididev(dp, dev)) == NULL)
 645                 return -ENODEV;
 646         if (snd_midi_event_encode_byte(mdev->coder, c, ev) > 0) {
 647                 snd_seq_oss_fill_addr(dp, ev, mdev->client, mdev->port);
 648                 snd_use_lock_free(&mdev->use_lock);
 649                 return 0;
 650         }
 651         snd_use_lock_free(&mdev->use_lock);
 652         return -EINVAL;
 653 }
 654
 655 /*
 656  * create OSS compatible midi_info record
 657  */
 658 int
 659 snd_seq_oss_midi_make_info(struct seq_oss_devinfo *dp, int dev, struct midi_info *inf)
 660 {
 661         struct seq_oss_midi *mdev;
 662
 663         if ((mdev = get_mididev(dp, dev)) == NULL)
 664                 return -ENXIO;
 665         inf->device = dev;
 666         inf->dev_type = 0; /* FIXME: ?? */
 667         inf->capabilities = 0; /* FIXME: ?? */
 668         strlcpy(inf->name, mdev->name, sizeof(inf->name));
 669         snd_use_lock_free(&mdev->use_lock);
 670         return 0;
 671 }
 672
 673
 674 #ifdef CONFIG_PROC_FS
 675 /*
 676  * proc interface
 677  */
 678 static char *
 679 capmode_str(int val)
 680 {
 681         val &= PERM_READ|PERM_WRITE;
 682         if (val == (PERM_READ|PERM_WRITE))
 683                 return "read/write";
 684         else if (val == PERM_READ)
 685                 return "read";
 686         else if (val == PERM_WRITE)
 687                 return "write";
 688         else
 689                 return "none";
 690 }
 691
 692 void
 693 snd_seq_oss_midi_info_read(struct snd_info_buffer *buf)
 694 {
 695         int i;
 696         struct seq_oss_midi *mdev;
 697
 698         snd_iprintf(buf, "\nNumber of MIDI devices: %d\n", max_midi_devs);
 699         for (i = 0; i < max_midi_devs; i++) {
 700                 snd_iprintf(buf, "\nmidi %d: ", i);
 701                 mdev = get_mdev(i);
 702                 if (mdev == NULL) {
 703                         snd_iprintf(buf, "*empty*\n");
 704                         continue;
 705                 }
 706                 snd_iprintf(buf, "[%s] ALSA port %d:%d\n", mdev->name,
 707                             mdev->client, mdev->port);
 708                 snd_iprintf(buf, "  capability %s / opened %s\n",
 709                             capmode_str(mdev->flags),
 710                             capmode_str(mdev->opened));
 711                 snd_use_lock_free(&mdev->use_lock);
 712         }
 713 }
 714 #endif /* CONFIG_PROC_FS */