LXR linux/sound/core/seq/oss/seq_oss

   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 */
  42struct 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 */
  58static int max_midi_devs;
  59static struct seq_oss_midi *midi_devs[SNDRV_SEQ_OSS_MAX_MIDI_DEVS];
  60
  61static DEFINE_SPINLOCK(register_lock);
  62
  63/*
  64 * prototypes
  65 */
  66static struct seq_oss_midi *get_mdev(int dev);
  67static struct seq_oss_midi *get_mididev(struct seq_oss_devinfo *dp, int dev);
  68static int send_synth_event(struct seq_oss_devinfo *dp, struct snd_seq_event *ev, int dev);
  69static 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 */
  75int
  76snd_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 */
 105static struct seq_oss_midi *
 106get_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 */
 122static struct seq_oss_midi *
 123find_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 */
 149int
 150snd_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        /* the port must include generic midi */
 157        if (! (pinfo->type & SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC))
 158                return 0;
 159        /* either read or write subscribable */
 160        if ((pinfo->capability & PERM_WRITE) != PERM_WRITE &&
 161            (pinfo->capability & PERM_READ) != PERM_READ)
 162                return 0;
 163
 164        /*
 165         * look for the identical slot
 166         */
 167        if ((mdev = find_slot(pinfo->addr.client, pinfo->addr.port)) != NULL) {
 168                /* already exists */
 169                snd_use_lock_free(&mdev->use_lock);
 170                return 0;
 171        }
 172
 173        /*
 174         * allocate midi info record
 175         */
 176        if ((mdev = kzalloc(sizeof(*mdev), GFP_KERNEL)) == NULL) {
 177                pr_err("ALSA: seq_oss: can't malloc midi info\n");
 178                return -ENOMEM;
 179        }
 180
 181        /* copy the port information */
 182        mdev->client = pinfo->addr.client;
 183        mdev->port = pinfo->addr.port;
 184        mdev->flags = pinfo->capability;
 185        mdev->opened = 0;
 186        snd_use_lock_init(&mdev->use_lock);
 187
 188        /* copy and truncate the name of synth device */
 189        strlcpy(mdev->name, pinfo->name, sizeof(mdev->name));
 190
 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");
 194                kfree(mdev);
 195                return -ENOMEM;
 196        }
 197        /* OSS sequencer adds running status to all sequences */
 198        snd_midi_event_no_status(mdev->coder, 1);
 199
 200        /*
 201         * look for en empty slot
 202         */
 203        spin_lock_irqsave(&register_lock, flags);
 204        for (i = 0; i < max_midi_devs; i++) {
 205                if (midi_devs[i] == NULL)
 206                        break;
 207        }
 208        if (i >= max_midi_devs) {
 209                if (max_midi_devs >= SNDRV_SEQ_OSS_MAX_MIDI_DEVS) {
 210                        spin_unlock_irqrestore(&register_lock, flags);
 211                        snd_midi_event_free(mdev->coder);
 212                        kfree(mdev);
 213                        return -ENOMEM;
 214                }
 215                max_midi_devs++;
 216        }
 217        mdev->seq_device = i;
 218        midi_devs[mdev->seq_device] = mdev;
 219        spin_unlock_irqrestore(&register_lock, flags);
 220
 221        return 0;
 222}
 223
 224/*
 225 * release the midi device if it was registered
 226 */
 227int
 228snd_seq_oss_midi_check_exit_port(int client, int port)
 229{
 230        struct seq_oss_midi *mdev;
 231        unsigned long flags;
 232        int index;
 233
 234        if ((mdev = find_slot(client, port)) != NULL) {
 235                spin_lock_irqsave(&register_lock, flags);
 236                midi_devs[mdev->seq_device] = NULL;
 237                spin_unlock_irqrestore(&register_lock, flags);
 238                snd_use_lock_free(&mdev->use_lock);
 239                snd_use_lock_sync(&mdev->use_lock);
 240                if (mdev->coder)
 241                        snd_midi_event_free(mdev->coder);
 242                kfree(mdev);
 243        }
 244        spin_lock_irqsave(&register_lock, flags);
 245        for (index = max_midi_devs - 1; index >= 0; index--) {
 246                if (midi_devs[index])
 247                        break;
 248        }
 249        max_midi_devs = index + 1;
 250        spin_unlock_irqrestore(&register_lock, flags);
 251        return 0;
 252}
 253
 254
 255/*
 256 * release the midi device if it was registered
 257 */
 258void
 259snd_seq_oss_midi_clear_all(void)
 260{
 261        int i;
 262        struct seq_oss_midi *mdev;
 263        unsigned long flags;
 264
 265        spin_lock_irqsave(&register_lock, flags);
 266        for (i = 0; i < max_midi_devs; i++) {
 267                if ((mdev = midi_devs[i]) != NULL) {
 268                        if (mdev->coder)
 269                                snd_midi_event_free(mdev->coder);
 270                        kfree(mdev);
 271                        midi_devs[i] = NULL;
 272                }
 273        }
 274        max_midi_devs = 0;
 275        spin_unlock_irqrestore(&register_lock, flags);
 276}
 277
 278
 279/*
 280 * set up midi tables
 281 */
 282void
 283snd_seq_oss_midi_setup(struct seq_oss_devinfo *dp)
 284{
 285        dp->max_mididev = max_midi_devs;
 286}
 287
 288/*
 289 * clean up midi tables
 290 */
 291void
 292snd_seq_oss_midi_cleanup(struct seq_oss_devinfo *dp)
 293{
 294        int i;
 295        for (i = 0; i < dp->max_mididev; i++)
 296                snd_seq_oss_midi_close(dp, i);
 297        dp->max_mididev = 0;
 298}
 299
 300
 301/*
 302 * open all midi devices.  ignore errors.
 303 */
 304void
 305snd_seq_oss_midi_open_all(struct seq_oss_devinfo *dp, int file_mode)
 306{
 307        int i;
 308        for (i = 0; i < dp->max_mididev; i++)
 309                snd_seq_oss_midi_open(dp, i, file_mode);
 310}
 311
 312
 313/*
 314 * get the midi device information
 315 */
 316static struct seq_oss_midi *
 317get_mididev(struct seq_oss_devinfo *dp, int dev)
 318{
 319        if (dev < 0 || dev >= dp->max_mididev)
 320                return NULL;
 321        return get_mdev(dev);
 322}
 323
 324
 325/*
 326 * open the midi device if not opened yet
 327 */
 328int
 329snd_seq_oss_midi_open(struct seq_oss_devinfo *dp, int dev, int fmode)
 330{
 331        int perm;
 332        struct seq_oss_midi *mdev;
 333        struct snd_seq_port_subscribe subs;
 334
 335        if ((mdev = get_mididev(dp, dev)) == NULL)
 336                return -ENODEV;
 337
 338        /* already used? */
 339        if (mdev->opened && mdev->devinfo != dp) {
 340                snd_use_lock_free(&mdev->use_lock);
 341                return -EBUSY;
 342        }
 343
 344        perm = 0;
 345        if (is_write_mode(fmode))
 346                perm |= PERM_WRITE;
 347        if (is_read_mode(fmode))
 348                perm |= PERM_READ;
 349        perm &= mdev->flags;
 350        if (perm == 0) {
 351                snd_use_lock_free(&mdev->use_lock);
 352                return -ENXIO;
 353        }
 354
 355        /* already opened? */
 356        if ((mdev->opened & perm) == perm) {
 357                snd_use_lock_free(&mdev->use_lock);
 358                return 0;
 359        }
 360
 361        perm &= ~mdev->opened;
 362
 363        memset(&subs, 0, sizeof(subs));
 364
 365        if (perm & PERM_WRITE) {
 366                subs.sender = dp->addr;
 367                subs.dest.client = mdev->client;
 368                subs.dest.port = mdev->port;
 369                if (snd_seq_kernel_client_ctl(dp->cseq, SNDRV_SEQ_IOCTL_SUBSCRIBE_PORT, &subs) >= 0)
 370                        mdev->opened |= PERM_WRITE;
 371        }
 372        if (perm & PERM_READ) {
 373                subs.sender.client = mdev->client;
 374                subs.sender.port = mdev->port;
 375                subs.dest = dp->addr;
 376                subs.flags = SNDRV_SEQ_PORT_SUBS_TIMESTAMP;
 377                subs.queue = dp->queue;         /* queue for timestamps */
 378                if (snd_seq_kernel_client_ctl(dp->cseq, SNDRV_SEQ_IOCTL_SUBSCRIBE_PORT, &subs) >= 0)
 379                        mdev->opened |= PERM_READ;
 380        }
 381
 382        if (! mdev->opened) {
 383                snd_use_lock_free(&mdev->use_lock);
 384                return -ENXIO;
 385        }
 386
 387        mdev->devinfo = dp;
 388        snd_use_lock_free(&mdev->use_lock);
 389        return 0;
 390}
 391
 392/*
 393 * close the midi device if already opened
 394 */
 395int
 396snd_seq_oss_midi_close(struct seq_oss_devinfo *dp, int dev)
 397{
 398        struct seq_oss_midi *mdev;
 399        struct snd_seq_port_subscribe subs;
 400
 401        if ((mdev = get_mididev(dp, dev)) == NULL)
 402                return -ENODEV;
 403        if (! mdev->opened || mdev->devinfo != dp) {
 404                snd_use_lock_free(&mdev->use_lock);
 405                return 0;
 406        }
 407
 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);
 414        }
 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);
 420        }
 421
 422        mdev->opened = 0;
 423        mdev->devinfo = NULL;
 424
 425        snd_use_lock_free(&mdev->use_lock);
 426        return 0;
 427}
 428
 429/*
 430 * change seq capability flags to file mode flags
 431 */
 432int
 433snd_seq_oss_midi_filemode(struct seq_oss_devinfo *dp, int dev)
 434{
 435        struct seq_oss_midi *mdev;
 436        int mode;
 437
 438        if ((mdev = get_mididev(dp, dev)) == NULL)
 439                return 0;
 440
 441        mode = 0;
 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;
 446
 447        snd_use_lock_free(&mdev->use_lock);
 448        return mode;
 449}
 450
 451/*
 452 * reset the midi device and close it:
 453 * so far, only close the device.
 454 */
 455void
 456snd_seq_oss_midi_reset(struct seq_oss_devinfo *dp, int dev)
 457{
 458        struct seq_oss_midi *mdev;
 459
 460        if ((mdev = get_mididev(dp, dev)) == NULL)
 461                return;
 462        if (! mdev->opened) {
 463                snd_use_lock_free(&mdev->use_lock);
 464                return;
 465        }
 466
 467        if (mdev->opened & PERM_WRITE) {
 468                struct snd_seq_event ev;
 469                int c;
 470
 471                memset(&ev, 0, sizeof(ev));
 472                ev.dest.client = mdev->client;
 473                ev.dest.port = mdev->port;
 474                ev.queue = dp->queue;
 475                ev.source.port = dp->port;
 476                if (dp->seq_mode == SNDRV_SEQ_OSS_MODE_SYNTH) {
 477                        ev.type = SNDRV_SEQ_EVENT_SENSING;
 478                        snd_seq_oss_dispatch(dp, &ev, 0, 0);
 479                }
 480                for (c = 0; c < 16; c++) {
 481                        ev.type = SNDRV_SEQ_EVENT_CONTROLLER;
 482                        ev.data.control.channel = c;
 483                        ev.data.control.param = MIDI_CTL_ALL_NOTES_OFF;
 484                        snd_seq_oss_dispatch(dp, &ev, 0, 0);
 485                        if (dp->seq_mode == SNDRV_SEQ_OSS_MODE_MUSIC) {
 486                                ev.data.control.param =
 487                                        MIDI_CTL_RESET_CONTROLLERS;
 488                                snd_seq_oss_dispatch(dp, &ev, 0, 0);
 489                                ev.type = SNDRV_SEQ_EVENT_PITCHBEND;
 490                                ev.data.control.value = 0;
 491                                snd_seq_oss_dispatch(dp, &ev, 0, 0);
 492                        }
 493                }
 494        }
 495        // snd_seq_oss_midi_close(dp, dev);
 496        snd_use_lock_free(&mdev->use_lock);
 497}
 498
 499
 500/*
 501 * get client/port of the specified MIDI device
 502 */
 503void
 504snd_seq_oss_midi_get_addr(struct seq_oss_devinfo *dp, int dev, struct snd_seq_addr *addr)
 505{
 506        struct seq_oss_midi *mdev;
 507
 508        if ((mdev = get_mididev(dp, dev)) == NULL)
 509                return;
 510        addr->client = mdev->client;
 511        addr->port = mdev->port;
 512        snd_use_lock_free(&mdev->use_lock);
 513}
 514
 515
 516/*
 517 * input callback - this can be atomic
 518 */
 519int
 520snd_seq_oss_midi_input(struct snd_seq_event *ev, int direct, void *private_data)
 521{
 522        struct seq_oss_devinfo *dp = (struct seq_oss_devinfo *)private_data;
 523        struct seq_oss_midi *mdev;
 524        int rc;
 525
 526        if (dp->readq == NULL)
 527                return 0;
 528        if ((mdev = find_slot(ev->source.client, ev->source.port)) == NULL)
 529                return 0;
 530        if (! (mdev->opened & PERM_READ)) {
 531                snd_use_lock_free(&mdev->use_lock);
 532                return 0;
 533        }
 534
 535        if (dp->seq_mode == SNDRV_SEQ_OSS_MODE_MUSIC)
 536                rc = send_synth_event(dp, ev, mdev->seq_device);
 537        else
 538                rc = send_midi_event(dp, ev, mdev);
 539
 540        snd_use_lock_free(&mdev->use_lock);
 541        return rc;
 542}
 543
 544/*
 545 * convert ALSA sequencer event to OSS synth event
 546 */
 547static int
 548send_synth_event(struct seq_oss_devinfo *dp, struct snd_seq_event *ev, int dev)
 549{
 550        union evrec ossev;
 551
 552        memset(&ossev, 0, sizeof(ossev));
 553
 554        switch (ev->type) {
 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;
 569        default:
 570                return 0; /* not supported */
 571        }
 572
 573        ossev.v.dev = dev;
 574
 575        switch (ev->type) {
 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;
 583                break;
 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;
 591                break;
 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;
 596                break;
 597        }
 598        
 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);
 601
 602        return 0;
 603}
 604
 605/*
 606 * decode event and send MIDI bytes to read queue
 607 */
 608static int
 609send_midi_event(struct seq_oss_devinfo *dp, struct snd_seq_event *ev, struct seq_oss_midi *mdev)
 610{
 611        char msg[32];
 612        int len;
 613        
 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);
 621        } else {
 622                len = snd_midi_event_decode(mdev->coder, msg, sizeof(msg), ev);
 623                if (len > 0)
 624                        snd_seq_oss_readq_puts(dp->readq, mdev->seq_device, msg, len);
 625        }
 626
 627        return 0;
 628}
 629
 630
 631/*
 632 * dump midi data
 633 * return 0 : enqueued
 634 *        non-zero : invalid - ignored
 635 */
 636int
 637snd_seq_oss_midi_putc(struct seq_oss_devinfo *dp, int dev, unsigned char c, struct snd_seq_event *ev)
 638{
 639        struct seq_oss_midi *mdev;
 640
 641        if ((mdev = get_mididev(dp, dev)) == NULL)
 642                return -ENODEV;
 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);
 646                return 0;
 647        }
 648        snd_use_lock_free(&mdev->use_lock);
 649        return -EINVAL;
 650}
 651
 652/*
 653 * create OSS compatible midi_info record
 654 */
 655int
 656snd_seq_oss_midi_make_info(struct seq_oss_devinfo *dp, int dev, struct midi_info *inf)
 657{
 658        struct seq_oss_midi *mdev;
 659
 660        if ((mdev = get_mididev(dp, dev)) == NULL)
 661                return -ENXIO;
 662        inf->device = dev;
 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);
 667        return 0;
 668}
 669
 670
 671#ifdef CONFIG_PROC_FS
 672/*
 673 * proc interface
 674 */
 675static char *
 676capmode_str(int val)
 677{
 678        val &= PERM_READ|PERM_WRITE;
 679        if (val == (PERM_READ|PERM_WRITE))
 680                return "read/write";
 681        else if (val == PERM_READ)
 682                return "read";
 683        else if (val == PERM_WRITE)
 684                return "write";
 685        else
 686                return "none";
 687}
 688
 689void
 690snd_seq_oss_midi_info_read(struct snd_info_buffer *buf)
 691{
 692        int i;
 693        struct seq_oss_midi *mdev;
 694
 695        snd_iprintf(buf, "\nNumber of MIDI devices: %d\n", max_midi_devs);
 696        for (i = 0; i < max_midi_devs; i++) {
 697                snd_iprintf(buf, "\nmidi %d: ", i);
 698                mdev = get_mdev(i);
 699                if (mdev == NULL) {
 700                        snd_iprintf(buf, "*empty*\n");
 701                        continue;
 702                }
 703                snd_iprintf(buf, "[%s] ALSA port %d:%d\n", mdev->name,
 704                            mdev->client, mdev->port);
 705                snd_iprintf(buf, "  capability %s / opened %s\n",
 706                            capmode_str(mdev->flags),
 707                            capmode_str(mdev->opened));
 708                snd_use_lock_free(&mdev->use_lock);
 709        }
 710}
 711#endif /* CONFIG_PROC_FS */
 712