sound/core/rawmidi.c

   1 /*
   2  *  Abstract layer for MIDI v1.0 stream
   3  *  Copyright (c) by Jaroslav Kysela <perex@perex.cz>
   4  *
   5  *
   6  *   This program is free software; you can redistribute it and/or modify
   7  *   it under the terms of the GNU General Public License as published by
   8  *   the Free Software Foundation; either version 2 of the License, or
   9  *   (at your option) any later version.
  10  *
  11  *   This program is distributed in the hope that it will be useful,
  12  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *   GNU General Public License for more details.
  15  *
  16  *   You should have received a copy of the GNU General Public License
  17  *   along with this program; if not, write to the Free Software
  18  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  19  *
  20  */
  21
  22 #include <sound/core.h>
  23 #include <linux/major.h>
  24 #include <linux/init.h>
  25 #include <linux/sched.h>
  26 #include <linux/slab.h>
  27 #include <linux/time.h>
  28 #include <linux/wait.h>
  29 #include <linux/mutex.h>
  30 #include <linux/module.h>
  31 #include <linux/delay.h>
  32 #include <linux/nospec.h>
  33 #include <sound/rawmidi.h>
  34 #include <sound/info.h>
  35 #include <sound/control.h>
  36 #include <sound/minors.h>
  37 #include <sound/initval.h>
  38
  39 MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>");
  40 MODULE_DESCRIPTION("Midlevel RawMidi code for ALSA.");
  41 MODULE_LICENSE("GPL");
  42
  43 #ifdef CONFIG_SND_OSSEMUL
  44 static int midi_map[SNDRV_CARDS];
  45 static int amidi_map[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS-1)] = 1};
  46 module_param_array(midi_map, int, NULL, 0444);
  47 MODULE_PARM_DESC(midi_map, "Raw MIDI device number assigned to 1st OSS device.");
  48 module_param_array(amidi_map, int, NULL, 0444);
  49 MODULE_PARM_DESC(amidi_map, "Raw MIDI device number assigned to 2nd OSS device.");
  50 #endif /* CONFIG_SND_OSSEMUL */
  51
  52 static int snd_rawmidi_free(struct snd_rawmidi *rawmidi);
  53 static int snd_rawmidi_dev_free(struct snd_device *device);
  54 static int snd_rawmidi_dev_register(struct snd_device *device);
  55 static int snd_rawmidi_dev_disconnect(struct snd_device *device);
  56
  57 static LIST_HEAD(snd_rawmidi_devices);
  58 static DEFINE_MUTEX(register_mutex);
  59
  60 #define rmidi_err(rmidi, fmt, args...) \
  61         dev_err(&(rmidi)->dev, fmt, ##args)
  62 #define rmidi_warn(rmidi, fmt, args...) \
  63         dev_warn(&(rmidi)->dev, fmt, ##args)
  64 #define rmidi_dbg(rmidi, fmt, args...) \
  65         dev_dbg(&(rmidi)->dev, fmt, ##args)
  66
  67 static struct snd_rawmidi *snd_rawmidi_search(struct snd_card *card, int device)
  68 {
  69         struct snd_rawmidi *rawmidi;
  70
  71         list_for_each_entry(rawmidi, &snd_rawmidi_devices, list)
  72                 if (rawmidi->card == card && rawmidi->device == device)
  73                         return rawmidi;
  74         return NULL;
  75 }
  76
  77 static inline unsigned short snd_rawmidi_file_flags(struct file *file)
  78 {
  79         switch (file->f_mode & (FMODE_READ | FMODE_WRITE)) {
  80         case FMODE_WRITE:
  81                 return SNDRV_RAWMIDI_LFLG_OUTPUT;
  82         case FMODE_READ:
  83                 return SNDRV_RAWMIDI_LFLG_INPUT;
  84         default:
  85                 return SNDRV_RAWMIDI_LFLG_OPEN;
  86         }
  87 }
  88
  89 static inline int snd_rawmidi_ready(struct snd_rawmidi_substream *substream)
  90 {
  91         struct snd_rawmidi_runtime *runtime = substream->runtime;
  92         return runtime->avail >= runtime->avail_min;
  93 }
  94
  95 static inline int snd_rawmidi_ready_append(struct snd_rawmidi_substream *substream,
  96                                            size_t count)
  97 {
  98         struct snd_rawmidi_runtime *runtime = substream->runtime;
  99         return runtime->avail >= runtime->avail_min &&
 100                (!substream->append || runtime->avail >= count);
 101 }
 102
 103 static void snd_rawmidi_input_event_work(struct work_struct *work)
 104 {
 105         struct snd_rawmidi_runtime *runtime =
 106                 container_of(work, struct snd_rawmidi_runtime, event_work);
 107         if (runtime->event)
 108                 runtime->event(runtime->substream);
 109 }
 110
 111 static int snd_rawmidi_runtime_create(struct snd_rawmidi_substream *substream)
 112 {
 113         struct snd_rawmidi_runtime *runtime;
 114
 115         if ((runtime = kzalloc(sizeof(*runtime), GFP_KERNEL)) == NULL)
 116                 return -ENOMEM;
 117         runtime->substream = substream;
 118         spin_lock_init(&runtime->lock);
 119         init_waitqueue_head(&runtime->sleep);
 120         INIT_WORK(&runtime->event_work, snd_rawmidi_input_event_work);
 121         runtime->event = NULL;
 122         runtime->buffer_size = PAGE_SIZE;
 123         runtime->avail_min = 1;
 124         if (substream->stream == SNDRV_RAWMIDI_STREAM_INPUT)
 125                 runtime->avail = 0;
 126         else
 127                 runtime->avail = runtime->buffer_size;
 128         if ((runtime->buffer = kmalloc(runtime->buffer_size, GFP_KERNEL)) == NULL) {
 129                 kfree(runtime);
 130                 return -ENOMEM;
 131         }
 132         runtime->appl_ptr = runtime->hw_ptr = 0;
 133         substream->runtime = runtime;
 134         return 0;
 135 }
 136
 137 static int snd_rawmidi_runtime_free(struct snd_rawmidi_substream *substream)
 138 {
 139         struct snd_rawmidi_runtime *runtime = substream->runtime;
 140
 141         kfree(runtime->buffer);
 142         kfree(runtime);
 143         substream->runtime = NULL;
 144         return 0;
 145 }
 146
 147 static inline void snd_rawmidi_output_trigger(struct snd_rawmidi_substream *substream,int up)
 148 {
 149         if (!substream->opened)
 150                 return;
 151         substream->ops->trigger(substream, up);
 152 }
 153
 154 static void snd_rawmidi_input_trigger(struct snd_rawmidi_substream *substream, int up)
 155 {
 156         if (!substream->opened)
 157                 return;
 158         substream->ops->trigger(substream, up);
 159         if (!up)
 160                 cancel_work_sync(&substream->runtime->event_work);
 161 }
 162
 163 int snd_rawmidi_drop_output(struct snd_rawmidi_substream *substream)
 164 {
 165         unsigned long flags;
 166         struct snd_rawmidi_runtime *runtime = substream->runtime;
 167
 168         snd_rawmidi_output_trigger(substream, 0);
 169         runtime->drain = 0;
 170         spin_lock_irqsave(&runtime->lock, flags);
 171         runtime->appl_ptr = runtime->hw_ptr = 0;
 172         runtime->avail = runtime->buffer_size;
 173         spin_unlock_irqrestore(&runtime->lock, flags);
 174         return 0;
 175 }
 176 EXPORT_SYMBOL(snd_rawmidi_drop_output);
 177
 178 int snd_rawmidi_drain_output(struct snd_rawmidi_substream *substream)
 179 {
 180         int err;
 181         long timeout;
 182         struct snd_rawmidi_runtime *runtime = substream->runtime;
 183
 184         err = 0;
 185         runtime->drain = 1;
 186         timeout = wait_event_interruptible_timeout(runtime->sleep,
 187                                 (runtime->avail >= runtime->buffer_size),
 188                                 10*HZ);
 189         if (signal_pending(current))
 190                 err = -ERESTARTSYS;
 191         if (runtime->avail < runtime->buffer_size && !timeout) {
 192                 rmidi_warn(substream->rmidi,
 193                            "rawmidi drain error (avail = %li, buffer_size = %li)\n",
 194                            (long)runtime->avail, (long)runtime->buffer_size);
 195                 err = -EIO;
 196         }
 197         runtime->drain = 0;
 198         if (err != -ERESTARTSYS) {
 199                 /* we need wait a while to make sure that Tx FIFOs are empty */
 200                 if (substream->ops->drain)
 201                         substream->ops->drain(substream);
 202                 else
 203                         msleep(50);
 204                 snd_rawmidi_drop_output(substream);
 205         }
 206         return err;
 207 }
 208 EXPORT_SYMBOL(snd_rawmidi_drain_output);
 209
 210 int snd_rawmidi_drain_input(struct snd_rawmidi_substream *substream)
 211 {
 212         unsigned long flags;
 213         struct snd_rawmidi_runtime *runtime = substream->runtime;
 214
 215         snd_rawmidi_input_trigger(substream, 0);
 216         runtime->drain = 0;
 217         spin_lock_irqsave(&runtime->lock, flags);
 218         runtime->appl_ptr = runtime->hw_ptr = 0;
 219         runtime->avail = 0;
 220         spin_unlock_irqrestore(&runtime->lock, flags);
 221         return 0;
 222 }
 223 EXPORT_SYMBOL(snd_rawmidi_drain_input);
 224
 225 /* look for an available substream for the given stream direction;
 226  * if a specific subdevice is given, try to assign it
 227  */
 228 static int assign_substream(struct snd_rawmidi *rmidi, int subdevice,
 229                             int stream, int mode,
 230                             struct snd_rawmidi_substream **sub_ret)
 231 {
 232         struct snd_rawmidi_substream *substream;
 233         struct snd_rawmidi_str *s = &rmidi->streams[stream];
 234         static unsigned int info_flags[2] = {
 235                 [SNDRV_RAWMIDI_STREAM_OUTPUT] = SNDRV_RAWMIDI_INFO_OUTPUT,
 236                 [SNDRV_RAWMIDI_STREAM_INPUT] = SNDRV_RAWMIDI_INFO_INPUT,
 237         };
 238
 239         if (!(rmidi->info_flags & info_flags[stream]))
 240                 return -ENXIO;
 241         if (subdevice >= 0 && subdevice >= s->substream_count)
 242                 return -ENODEV;
 243
 244         list_for_each_entry(substream, &s->substreams, list) {
 245                 if (substream->opened) {
 246                         if (stream == SNDRV_RAWMIDI_STREAM_INPUT ||
 247                             !(mode & SNDRV_RAWMIDI_LFLG_APPEND) ||
 248                             !substream->append)
 249                                 continue;
 250                 }
 251                 if (subdevice < 0 || subdevice == substream->number) {
 252                         *sub_ret = substream;
 253                         return 0;
 254                 }
 255         }
 256         return -EAGAIN;
 257 }
 258
 259 /* open and do ref-counting for the given substream */
 260 static int open_substream(struct snd_rawmidi *rmidi,
 261                           struct snd_rawmidi_substream *substream,
 262                           int mode)
 263 {
 264         int err;
 265
 266         if (substream->use_count == 0) {
 267                 err = snd_rawmidi_runtime_create(substream);
 268                 if (err < 0)
 269                         return err;
 270                 err = substream->ops->open(substream);
 271                 if (err < 0) {
 272                         snd_rawmidi_runtime_free(substream);
 273                         return err;
 274                 }
 275                 substream->opened = 1;
 276                 substream->active_sensing = 0;
 277                 if (mode & SNDRV_RAWMIDI_LFLG_APPEND)
 278                         substream->append = 1;
 279                 substream->pid = get_pid(task_pid(current));
 280                 rmidi->streams[substream->stream].substream_opened++;
 281         }
 282         substream->use_count++;
 283         return 0;
 284 }
 285
 286 static void close_substream(struct snd_rawmidi *rmidi,
 287                             struct snd_rawmidi_substream *substream,
 288                             int cleanup);
 289
 290 static int rawmidi_open_priv(struct snd_rawmidi *rmidi, int subdevice, int mode,
 291                              struct snd_rawmidi_file *rfile)
 292 {
 293         struct snd_rawmidi_substream *sinput = NULL, *soutput = NULL;
 294         int err;
 295
 296         rfile->input = rfile->output = NULL;
 297         if (mode & SNDRV_RAWMIDI_LFLG_INPUT) {
 298                 err = assign_substream(rmidi, subdevice,
 299                                        SNDRV_RAWMIDI_STREAM_INPUT,
 300                                        mode, &sinput);
 301                 if (err < 0)
 302                         return err;
 303         }
 304         if (mode & SNDRV_RAWMIDI_LFLG_OUTPUT) {
 305                 err = assign_substream(rmidi, subdevice,
 306                                        SNDRV_RAWMIDI_STREAM_OUTPUT,
 307                                        mode, &soutput);
 308                 if (err < 0)
 309                         return err;
 310         }
 311
 312         if (sinput) {
 313                 err = open_substream(rmidi, sinput, mode);
 314                 if (err < 0)
 315                         return err;
 316         }
 317         if (soutput) {
 318                 err = open_substream(rmidi, soutput, mode);
 319                 if (err < 0) {
 320                         if (sinput)
 321                                 close_substream(rmidi, sinput, 0);
 322                         return err;
 323                 }
 324         }
 325
 326         rfile->rmidi = rmidi;
 327         rfile->input = sinput;
 328         rfile->output = soutput;
 329         return 0;
 330 }
 331
 332 /* called from sound/core/seq/seq_midi.c */
 333 int snd_rawmidi_kernel_open(struct snd_card *card, int device, int subdevice,
 334                             int mode, struct snd_rawmidi_file * rfile)
 335 {
 336         struct snd_rawmidi *rmidi;
 337         int err;
 338
 339         if (snd_BUG_ON(!rfile))
 340                 return -EINVAL;
 341
 342         mutex_lock(&register_mutex);
 343         rmidi = snd_rawmidi_search(card, device);
 344         if (rmidi == NULL) {
 345                 mutex_unlock(&register_mutex);
 346                 return -ENODEV;
 347         }
 348         if (!try_module_get(rmidi->card->module)) {
 349                 mutex_unlock(&register_mutex);
 350                 return -ENXIO;
 351         }
 352         mutex_unlock(&register_mutex);
 353
 354         mutex_lock(&rmidi->open_mutex);
 355         err = rawmidi_open_priv(rmidi, subdevice, mode, rfile);
 356         mutex_unlock(&rmidi->open_mutex);
 357         if (err < 0)
 358                 module_put(rmidi->card->module);
 359         return err;
 360 }
 361 EXPORT_SYMBOL(snd_rawmidi_kernel_open);
 362
 363 static int snd_rawmidi_open(struct inode *inode, struct file *file)
 364 {
 365         int maj = imajor(inode);
 366         struct snd_card *card;
 367         int subdevice;
 368         unsigned short fflags;
 369         int err;
 370         struct snd_rawmidi *rmidi;
 371         struct snd_rawmidi_file *rawmidi_file = NULL;
 372         wait_queue_t wait;
 373
 374         if ((file->f_flags & O_APPEND) && !(file->f_flags & O_NONBLOCK))
 375                 return -EINVAL;         /* invalid combination */
 376
 377         err = nonseekable_open(inode, file);
 378         if (err < 0)
 379                 return err;
 380
 381         if (maj == snd_major) {
 382                 rmidi = snd_lookup_minor_data(iminor(inode),
 383                                               SNDRV_DEVICE_TYPE_RAWMIDI);
 384 #ifdef CONFIG_SND_OSSEMUL
 385         } else if (maj == SOUND_MAJOR) {
 386                 rmidi = snd_lookup_oss_minor_data(iminor(inode),
 387                                                   SNDRV_OSS_DEVICE_TYPE_MIDI);
 388 #endif
 389         } else
 390                 return -ENXIO;
 391
 392         if (rmidi == NULL)
 393                 return -ENODEV;
 394
 395         if (!try_module_get(rmidi->card->module)) {
 396                 snd_card_unref(rmidi->card);
 397                 return -ENXIO;
 398         }
 399
 400         mutex_lock(&rmidi->open_mutex);
 401         card = rmidi->card;
 402         err = snd_card_file_add(card, file);
 403         if (err < 0)
 404                 goto __error_card;
 405         fflags = snd_rawmidi_file_flags(file);
 406         if ((file->f_flags & O_APPEND) || maj == SOUND_MAJOR) /* OSS emul? */
 407                 fflags |= SNDRV_RAWMIDI_LFLG_APPEND;
 408         rawmidi_file = kmalloc(sizeof(*rawmidi_file), GFP_KERNEL);
 409         if (rawmidi_file == NULL) {
 410                 err = -ENOMEM;
 411                 goto __error;
 412         }
 413         init_waitqueue_entry(&wait, current);
 414         add_wait_queue(&rmidi->open_wait, &wait);
 415         while (1) {
 416                 subdevice = snd_ctl_get_preferred_subdevice(card, SND_CTL_SUBDEV_RAWMIDI);
 417                 err = rawmidi_open_priv(rmidi, subdevice, fflags, rawmidi_file);
 418                 if (err >= 0)
 419                         break;
 420                 if (err == -EAGAIN) {
 421                         if (file->f_flags & O_NONBLOCK) {
 422                                 err = -EBUSY;
 423                                 break;
 424                         }
 425                 } else
 426                         break;
 427                 set_current_state(TASK_INTERRUPTIBLE);
 428                 mutex_unlock(&rmidi->open_mutex);
 429                 schedule();
 430                 mutex_lock(&rmidi->open_mutex);
 431                 if (rmidi->card->shutdown) {
 432                         err = -ENODEV;
 433                         break;
 434                 }
 435                 if (signal_pending(current)) {
 436                         err = -ERESTARTSYS;
 437                         break;
 438                 }
 439         }
 440         remove_wait_queue(&rmidi->open_wait, &wait);
 441         if (err < 0) {
 442                 kfree(rawmidi_file);
 443                 goto __error;
 444         }
 445 #ifdef CONFIG_SND_OSSEMUL
 446         if (rawmidi_file->input && rawmidi_file->input->runtime)
 447                 rawmidi_file->input->runtime->oss = (maj == SOUND_MAJOR);
 448         if (rawmidi_file->output && rawmidi_file->output->runtime)
 449                 rawmidi_file->output->runtime->oss = (maj == SOUND_MAJOR);
 450 #endif
 451         file->private_data = rawmidi_file;
 452         mutex_unlock(&rmidi->open_mutex);
 453         snd_card_unref(rmidi->card);
 454         return 0;
 455
 456  __error:
 457         snd_card_file_remove(card, file);
 458  __error_card:
 459         mutex_unlock(&rmidi->open_mutex);
 460         module_put(rmidi->card->module);
 461         snd_card_unref(rmidi->card);
 462         return err;
 463 }
 464
 465 static void close_substream(struct snd_rawmidi *rmidi,
 466                             struct snd_rawmidi_substream *substream,
 467                             int cleanup)
 468 {
 469         if (--substream->use_count)
 470                 return;
 471
 472         if (cleanup) {
 473                 if (substream->stream == SNDRV_RAWMIDI_STREAM_INPUT)
 474                         snd_rawmidi_input_trigger(substream, 0);
 475                 else {
 476                         if (substream->active_sensing) {
 477                                 unsigned char buf = 0xfe;
 478                                 /* sending single active sensing message
 479                                  * to shut the device up
 480                                  */
 481                                 snd_rawmidi_kernel_write(substream, &buf, 1);
 482                         }
 483                         if (snd_rawmidi_drain_output(substream) == -ERESTARTSYS)
 484                                 snd_rawmidi_output_trigger(substream, 0);
 485                 }
 486         }
 487         substream->ops->close(substream);
 488         if (substream->runtime->private_free)
 489                 substream->runtime->private_free(substream);
 490         snd_rawmidi_runtime_free(substream);
 491         substream->opened = 0;
 492         substream->append = 0;
 493         put_pid(substream->pid);
 494         substream->pid = NULL;
 495         rmidi->streams[substream->stream].substream_opened--;
 496 }
 497
 498 static void rawmidi_release_priv(struct snd_rawmidi_file *rfile)
 499 {
 500         struct snd_rawmidi *rmidi;
 501
 502         rmidi = rfile->rmidi;
 503         mutex_lock(&rmidi->open_mutex);
 504         if (rfile->input) {
 505                 close_substream(rmidi, rfile->input, 1);
 506                 rfile->input = NULL;
 507         }
 508         if (rfile->output) {
 509                 close_substream(rmidi, rfile->output, 1);
 510                 rfile->output = NULL;
 511         }
 512         rfile->rmidi = NULL;
 513         mutex_unlock(&rmidi->open_mutex);
 514         wake_up(&rmidi->open_wait);
 515 }
 516
 517 /* called from sound/core/seq/seq_midi.c */
 518 int snd_rawmidi_kernel_release(struct snd_rawmidi_file *rfile)
 519 {
 520         struct snd_rawmidi *rmidi;
 521
 522         if (snd_BUG_ON(!rfile))
 523                 return -ENXIO;
 524
 525         rmidi = rfile->rmidi;
 526         rawmidi_release_priv(rfile);
 527         module_put(rmidi->card->module);
 528         return 0;
 529 }
 530 EXPORT_SYMBOL(snd_rawmidi_kernel_release);
 531
 532 static int snd_rawmidi_release(struct inode *inode, struct file *file)
 533 {
 534         struct snd_rawmidi_file *rfile;
 535         struct snd_rawmidi *rmidi;
 536         struct module *module;
 537
 538         rfile = file->private_data;
 539         rmidi = rfile->rmidi;
 540         rawmidi_release_priv(rfile);
 541         kfree(rfile);
 542         module = rmidi->card->module;
 543         snd_card_file_remove(rmidi->card, file);
 544         module_put(module);
 545         return 0;
 546 }
 547
 548 static int snd_rawmidi_info(struct snd_rawmidi_substream *substream,
 549                             struct snd_rawmidi_info *info)
 550 {
 551         struct snd_rawmidi *rmidi;
 552
 553         if (substream == NULL)
 554                 return -ENODEV;
 555         rmidi = substream->rmidi;
 556         memset(info, 0, sizeof(*info));
 557         info->card = rmidi->card->number;
 558         info->device = rmidi->device;
 559         info->subdevice = substream->number;
 560         info->stream = substream->stream;
 561         info->flags = rmidi->info_flags;
 562         strcpy(info->id, rmidi->id);
 563         strcpy(info->name, rmidi->name);
 564         strcpy(info->subname, substream->name);
 565         info->subdevices_count = substream->pstr->substream_count;
 566         info->subdevices_avail = (substream->pstr->substream_count -
 567                                   substream->pstr->substream_opened);
 568         return 0;
 569 }
 570
 571 static int snd_rawmidi_info_user(struct snd_rawmidi_substream *substream,
 572                                  struct snd_rawmidi_info __user * _info)
 573 {
 574         struct snd_rawmidi_info info;
 575         int err;
 576         if ((err = snd_rawmidi_info(substream, &info)) < 0)
 577                 return err;
 578         if (copy_to_user(_info, &info, sizeof(struct snd_rawmidi_info)))
 579                 return -EFAULT;
 580         return 0;
 581 }
 582
 583 static int __snd_rawmidi_info_select(struct snd_card *card,
 584                                      struct snd_rawmidi_info *info)
 585 {
 586         struct snd_rawmidi *rmidi;
 587         struct snd_rawmidi_str *pstr;
 588         struct snd_rawmidi_substream *substream;
 589
 590         rmidi = snd_rawmidi_search(card, info->device);
 591         if (!rmidi)
 592                 return -ENXIO;
 593         if (info->stream < 0 || info->stream > 1)
 594                 return -EINVAL;
 595         info->stream = array_index_nospec(info->stream, 2);
 596         pstr = &rmidi->streams[info->stream];
 597         if (pstr->substream_count == 0)
 598                 return -ENOENT;
 599         if (info->subdevice >= pstr->substream_count)
 600                 return -ENXIO;
 601         list_for_each_entry(substream, &pstr->substreams, list) {
 602                 if ((unsigned int)substream->number == info->subdevice)
 603                         return snd_rawmidi_info(substream, info);
 604         }
 605         return -ENXIO;
 606 }
 607
 608 int snd_rawmidi_info_select(struct snd_card *card, struct snd_rawmidi_info *info)
 609 {
 610         int ret;
 611
 612         mutex_lock(&register_mutex);
 613         ret = __snd_rawmidi_info_select(card, info);
 614         mutex_unlock(&register_mutex);
 615         return ret;
 616 }
 617 EXPORT_SYMBOL(snd_rawmidi_info_select);
 618
 619 static int snd_rawmidi_info_select_user(struct snd_card *card,
 620                                         struct snd_rawmidi_info __user *_info)
 621 {
 622         int err;
 623         struct snd_rawmidi_info info;
 624         if (get_user(info.device, &_info->device))
 625                 return -EFAULT;
 626         if (get_user(info.stream, &_info->stream))
 627                 return -EFAULT;
 628         if (get_user(info.subdevice, &_info->subdevice))
 629                 return -EFAULT;
 630         if ((err = snd_rawmidi_info_select(card, &info)) < 0)
 631                 return err;
 632         if (copy_to_user(_info, &info, sizeof(struct snd_rawmidi_info)))
 633                 return -EFAULT;
 634         return 0;
 635 }
 636
 637 int snd_rawmidi_output_params(struct snd_rawmidi_substream *substream,
 638                               struct snd_rawmidi_params * params)
 639 {
 640         char *newbuf, *oldbuf;
 641         struct snd_rawmidi_runtime *runtime = substream->runtime;
 642
 643         if (substream->append && substream->use_count > 1)
 644                 return -EBUSY;
 645         snd_rawmidi_drain_output(substream);
 646         if (params->buffer_size < 32 || params->buffer_size > 1024L * 1024L) {
 647                 return -EINVAL;
 648         }
 649         if (params->avail_min < 1 || params->avail_min > params->buffer_size) {
 650                 return -EINVAL;
 651         }
 652         if (params->buffer_size != runtime->buffer_size) {
 653                 newbuf = kmalloc(params->buffer_size, GFP_KERNEL);
 654                 if (!newbuf)
 655                         return -ENOMEM;
 656                 spin_lock_irq(&runtime->lock);
 657                 oldbuf = runtime->buffer;
 658                 runtime->buffer = newbuf;
 659                 runtime->buffer_size = params->buffer_size;
 660                 runtime->avail = runtime->buffer_size;
 661                 runtime->appl_ptr = runtime->hw_ptr = 0;
 662                 spin_unlock_irq(&runtime->lock);
 663                 kfree(oldbuf);
 664         }
 665         runtime->avail_min = params->avail_min;
 666         substream->active_sensing = !params->no_active_sensing;
 667         return 0;
 668 }
 669 EXPORT_SYMBOL(snd_rawmidi_output_params);
 670
 671 int snd_rawmidi_input_params(struct snd_rawmidi_substream *substream,
 672                              struct snd_rawmidi_params * params)
 673 {
 674         char *newbuf, *oldbuf;
 675         struct snd_rawmidi_runtime *runtime = substream->runtime;
 676
 677         snd_rawmidi_drain_input(substream);
 678         if (params->buffer_size < 32 || params->buffer_size > 1024L * 1024L) {
 679                 return -EINVAL;
 680         }
 681         if (params->avail_min < 1 || params->avail_min > params->buffer_size) {
 682                 return -EINVAL;
 683         }
 684         if (params->buffer_size != runtime->buffer_size) {
 685                 newbuf = kmalloc(params->buffer_size, GFP_KERNEL);
 686                 if (!newbuf)
 687                         return -ENOMEM;
 688                 spin_lock_irq(&runtime->lock);
 689                 oldbuf = runtime->buffer;
 690                 runtime->buffer = newbuf;
 691                 runtime->buffer_size = params->buffer_size;
 692                 runtime->appl_ptr = runtime->hw_ptr = 0;
 693                 spin_unlock_irq(&runtime->lock);
 694                 kfree(oldbuf);
 695         }
 696         runtime->avail_min = params->avail_min;
 697         return 0;
 698 }
 699 EXPORT_SYMBOL(snd_rawmidi_input_params);
 700
 701 static int snd_rawmidi_output_status(struct snd_rawmidi_substream *substream,
 702                                      struct snd_rawmidi_status * status)
 703 {
 704         struct snd_rawmidi_runtime *runtime = substream->runtime;
 705
 706         memset(status, 0, sizeof(*status));
 707         status->stream = SNDRV_RAWMIDI_STREAM_OUTPUT;
 708         spin_lock_irq(&runtime->lock);
 709         status->avail = runtime->avail;
 710         spin_unlock_irq(&runtime->lock);
 711         return 0;
 712 }
 713
 714 static int snd_rawmidi_input_status(struct snd_rawmidi_substream *substream,
 715                                     struct snd_rawmidi_status * status)
 716 {
 717         struct snd_rawmidi_runtime *runtime = substream->runtime;
 718
 719         memset(status, 0, sizeof(*status));
 720         status->stream = SNDRV_RAWMIDI_STREAM_INPUT;
 721         spin_lock_irq(&runtime->lock);
 722         status->avail = runtime->avail;
 723         status->xruns = runtime->xruns;
 724         runtime->xruns = 0;
 725         spin_unlock_irq(&runtime->lock);
 726         return 0;
 727 }
 728
 729 static long snd_rawmidi_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 730 {
 731         struct snd_rawmidi_file *rfile;
 732         void __user *argp = (void __user *)arg;
 733
 734         rfile = file->private_data;
 735         if (((cmd >> 8) & 0xff) != 'W')
 736                 return -ENOTTY;
 737         switch (cmd) {
 738         case SNDRV_RAWMIDI_IOCTL_PVERSION:
 739                 return put_user(SNDRV_RAWMIDI_VERSION, (int __user *)argp) ? -EFAULT : 0;
 740         case SNDRV_RAWMIDI_IOCTL_INFO:
 741         {
 742                 int stream;
 743                 struct snd_rawmidi_info __user *info = argp;
 744                 if (get_user(stream, &info->stream))
 745                         return -EFAULT;
 746                 switch (stream) {
 747                 case SNDRV_RAWMIDI_STREAM_INPUT:
 748                         return snd_rawmidi_info_user(rfile->input, info);
 749                 case SNDRV_RAWMIDI_STREAM_OUTPUT:
 750                         return snd_rawmidi_info_user(rfile->output, info);
 751                 default:
 752                         return -EINVAL;
 753                 }
 754         }
 755         case SNDRV_RAWMIDI_IOCTL_PARAMS:
 756         {
 757                 struct snd_rawmidi_params params;
 758                 if (copy_from_user(&params, argp, sizeof(struct snd_rawmidi_params)))
 759                         return -EFAULT;
 760                 switch (params.stream) {
 761                 case SNDRV_RAWMIDI_STREAM_OUTPUT:
 762                         if (rfile->output == NULL)
 763                                 return -EINVAL;
 764                         return snd_rawmidi_output_params(rfile->output, &params);
 765                 case SNDRV_RAWMIDI_STREAM_INPUT:
 766                         if (rfile->input == NULL)
 767                                 return -EINVAL;
 768                         return snd_rawmidi_input_params(rfile->input, &params);
 769                 default:
 770                         return -EINVAL;
 771                 }
 772         }
 773         case SNDRV_RAWMIDI_IOCTL_STATUS:
 774         {
 775                 int err = 0;
 776                 struct snd_rawmidi_status status;
 777                 if (copy_from_user(&status, argp, sizeof(struct snd_rawmidi_status)))
 778                         return -EFAULT;
 779                 switch (status.stream) {
 780                 case SNDRV_RAWMIDI_STREAM_OUTPUT:
 781                         if (rfile->output == NULL)
 782                                 return -EINVAL;
 783                         err = snd_rawmidi_output_status(rfile->output, &status);
 784                         break;
 785                 case SNDRV_RAWMIDI_STREAM_INPUT:
 786                         if (rfile->input == NULL)
 787                                 return -EINVAL;
 788                         err = snd_rawmidi_input_status(rfile->input, &status);
 789                         break;
 790                 default:
 791                         return -EINVAL;
 792                 }
 793                 if (err < 0)
 794                         return err;
 795                 if (copy_to_user(argp, &status, sizeof(struct snd_rawmidi_status)))
 796                         return -EFAULT;
 797                 return 0;
 798         }
 799         case SNDRV_RAWMIDI_IOCTL_DROP:
 800         {
 801                 int val;
 802                 if (get_user(val, (int __user *) argp))
 803                         return -EFAULT;
 804                 switch (val) {
 805                 case SNDRV_RAWMIDI_STREAM_OUTPUT:
 806                         if (rfile->output == NULL)
 807                                 return -EINVAL;
 808                         return snd_rawmidi_drop_output(rfile->output);
 809                 default:
 810                         return -EINVAL;
 811                 }
 812         }
 813         case SNDRV_RAWMIDI_IOCTL_DRAIN:
 814         {
 815                 int val;
 816                 if (get_user(val, (int __user *) argp))
 817                         return -EFAULT;
 818                 switch (val) {
 819                 case SNDRV_RAWMIDI_STREAM_OUTPUT:
 820                         if (rfile->output == NULL)
 821                                 return -EINVAL;
 822                         return snd_rawmidi_drain_output(rfile->output);
 823                 case SNDRV_RAWMIDI_STREAM_INPUT:
 824                         if (rfile->input == NULL)
 825                                 return -EINVAL;
 826                         return snd_rawmidi_drain_input(rfile->input);
 827                 default:
 828                         return -EINVAL;
 829                 }
 830         }
 831         default:
 832                 rmidi_dbg(rfile->rmidi,
 833                           "rawmidi: unknown command = 0x%x\n", cmd);
 834         }
 835         return -ENOTTY;
 836 }
 837
 838 static int snd_rawmidi_control_ioctl(struct snd_card *card,
 839                                      struct snd_ctl_file *control,
 840                                      unsigned int cmd,
 841                                      unsigned long arg)
 842 {
 843         void __user *argp = (void __user *)arg;
 844
 845         switch (cmd) {
 846         case SNDRV_CTL_IOCTL_RAWMIDI_NEXT_DEVICE:
 847         {
 848                 int device;
 849
 850                 if (get_user(device, (int __user *)argp))
 851                         return -EFAULT;
 852                 if (device >= SNDRV_RAWMIDI_DEVICES) /* next device is -1 */
 853                         device = SNDRV_RAWMIDI_DEVICES - 1;
 854                 mutex_lock(&register_mutex);
 855                 device = device < 0 ? 0 : device + 1;
 856                 while (device < SNDRV_RAWMIDI_DEVICES) {
 857                         if (snd_rawmidi_search(card, device))
 858                                 break;
 859                         device++;
 860                 }
 861                 if (device == SNDRV_RAWMIDI_DEVICES)
 862                         device = -1;
 863                 mutex_unlock(&register_mutex);
 864                 if (put_user(device, (int __user *)argp))
 865                         return -EFAULT;
 866                 return 0;
 867         }
 868         case SNDRV_CTL_IOCTL_RAWMIDI_PREFER_SUBDEVICE:
 869         {
 870                 int val;
 871
 872                 if (get_user(val, (int __user *)argp))
 873                         return -EFAULT;
 874                 control->preferred_subdevice[SND_CTL_SUBDEV_RAWMIDI] = val;
 875                 return 0;
 876         }
 877         case SNDRV_CTL_IOCTL_RAWMIDI_INFO:
 878                 return snd_rawmidi_info_select_user(card, argp);
 879         }
 880         return -ENOIOCTLCMD;
 881 }
 882
 883 /**
 884  * snd_rawmidi_receive - receive the input data from the device
 885  * @substream: the rawmidi substream
 886  * @buffer: the buffer pointer
 887  * @count: the data size to read
 888  *
 889  * Reads the data from the internal buffer.
 890  *
 891  * Return: The size of read data, or a negative error code on failure.
 892  */
 893 int snd_rawmidi_receive(struct snd_rawmidi_substream *substream,
 894                         const unsigned char *buffer, int count)
 895 {
 896         unsigned long flags;
 897         int result = 0, count1;
 898         struct snd_rawmidi_runtime *runtime = substream->runtime;
 899
 900         if (!substream->opened)
 901                 return -EBADFD;
 902         if (runtime->buffer == NULL) {
 903                 rmidi_dbg(substream->rmidi,
 904                           "snd_rawmidi_receive: input is not active!!!\n");
 905                 return -EINVAL;
 906         }
 907         spin_lock_irqsave(&runtime->lock, flags);
 908         if (count == 1) {       /* special case, faster code */
 909                 substream->bytes++;
 910                 if (runtime->avail < runtime->buffer_size) {
 911                         runtime->buffer[runtime->hw_ptr++] = buffer[0];
 912                         runtime->hw_ptr %= runtime->buffer_size;
 913                         runtime->avail++;
 914                         result++;
 915                 } else {
 916                         runtime->xruns++;
 917                 }
 918         } else {
 919                 substream->bytes += count;
 920                 count1 = runtime->buffer_size - runtime->hw_ptr;
 921                 if (count1 > count)
 922                         count1 = count;
 923                 if (count1 > (int)(runtime->buffer_size - runtime->avail))
 924                         count1 = runtime->buffer_size - runtime->avail;
 925                 memcpy(runtime->buffer + runtime->hw_ptr, buffer, count1);
 926                 runtime->hw_ptr += count1;
 927                 runtime->hw_ptr %= runtime->buffer_size;
 928                 runtime->avail += count1;
 929                 count -= count1;
 930                 result += count1;
 931                 if (count > 0) {
 932                         buffer += count1;
 933                         count1 = count;
 934                         if (count1 > (int)(runtime->buffer_size - runtime->avail)) {
 935                                 count1 = runtime->buffer_size - runtime->avail;
 936                                 runtime->xruns += count - count1;
 937                         }
 938                         if (count1 > 0) {
 939                                 memcpy(runtime->buffer, buffer, count1);
 940                                 runtime->hw_ptr = count1;
 941                                 runtime->avail += count1;
 942                                 result += count1;
 943                         }
 944                 }
 945         }
 946         if (result > 0) {
 947                 if (runtime->event)
 948                         schedule_work(&runtime->event_work);
 949                 else if (snd_rawmidi_ready(substream))
 950                         wake_up(&runtime->sleep);
 951         }
 952         spin_unlock_irqrestore(&runtime->lock, flags);
 953         return result;
 954 }
 955 EXPORT_SYMBOL(snd_rawmidi_receive);
 956
 957 static long snd_rawmidi_kernel_read1(struct snd_rawmidi_substream *substream,
 958                                      unsigned char __user *userbuf,
 959                                      unsigned char *kernelbuf, long count)
 960 {
 961         unsigned long flags;
 962         long result = 0, count1;
 963         struct snd_rawmidi_runtime *runtime = substream->runtime;
 964         unsigned long appl_ptr;
 965
 966         spin_lock_irqsave(&runtime->lock, flags);
 967         while (count > 0 && runtime->avail) {
 968                 count1 = runtime->buffer_size - runtime->appl_ptr;
 969                 if (count1 > count)
 970                         count1 = count;
 971                 if (count1 > (int)runtime->avail)
 972                         count1 = runtime->avail;
 973
 974                 /* update runtime->appl_ptr before unlocking for userbuf */
 975                 appl_ptr = runtime->appl_ptr;
 976                 runtime->appl_ptr += count1;
 977                 runtime->appl_ptr %= runtime->buffer_size;
 978                 runtime->avail -= count1;
 979
 980                 if (kernelbuf)
 981                         memcpy(kernelbuf + result, runtime->buffer + appl_ptr, count1);
 982                 if (userbuf) {
 983                         spin_unlock_irqrestore(&runtime->lock, flags);
 984                         if (copy_to_user(userbuf + result,
 985                                          runtime->buffer + appl_ptr, count1)) {
 986                                 return result > 0 ? result : -EFAULT;
 987                         }
 988                         spin_lock_irqsave(&runtime->lock, flags);
 989                 }
 990                 result += count1;
 991                 count -= count1;
 992         }
 993         spin_unlock_irqrestore(&runtime->lock, flags);
 994         return result;
 995 }
 996
 997 long snd_rawmidi_kernel_read(struct snd_rawmidi_substream *substream,
 998                              unsigned char *buf, long count)
 999 {
1000         snd_rawmidi_input_trigger(substream, 1);
1001         return snd_rawmidi_kernel_read1(substream, NULL/*userbuf*/, buf, count);
1002 }
1003 EXPORT_SYMBOL(snd_rawmidi_kernel_read);
1004
1005 static ssize_t snd_rawmidi_read(struct file *file, char __user *buf, size_t count,
1006                                 loff_t *offset)
1007 {
1008         long result;
1009         int count1;
1010         struct snd_rawmidi_file *rfile;
1011         struct snd_rawmidi_substream *substream;
1012         struct snd_rawmidi_runtime *runtime;
1013
1014         rfile = file->private_data;
1015         substream = rfile->input;
1016         if (substream == NULL)
1017                 return -EIO;
1018         runtime = substream->runtime;
1019         snd_rawmidi_input_trigger(substream, 1);
1020         result = 0;
1021         while (count > 0) {
1022                 spin_lock_irq(&runtime->lock);
1023                 while (!snd_rawmidi_ready(substream)) {
1024                         wait_queue_t wait;
1025                         if ((file->f_flags & O_NONBLOCK) != 0 || result > 0) {
1026                                 spin_unlock_irq(&runtime->lock);
1027                                 return result > 0 ? result : -EAGAIN;
1028                         }
1029                         init_waitqueue_entry(&wait, current);
1030                         add_wait_queue(&runtime->sleep, &wait);
1031                         set_current_state(TASK_INTERRUPTIBLE);
1032                         spin_unlock_irq(&runtime->lock);
1033                         schedule();
1034                         remove_wait_queue(&runtime->sleep, &wait);
1035                         if (rfile->rmidi->card->shutdown)
1036                                 return -ENODEV;
1037                         if (signal_pending(current))
1038                                 return result > 0 ? result : -ERESTARTSYS;
1039                         if (!runtime->avail)
1040                                 return result > 0 ? result : -EIO;
1041                         spin_lock_irq(&runtime->lock);
1042                 }
1043                 spin_unlock_irq(&runtime->lock);
1044                 count1 = snd_rawmidi_kernel_read1(substream,
1045                                                   (unsigned char __user *)buf,
1046                                                   NULL/*kernelbuf*/,
1047                                                   count);
1048                 if (count1 < 0)
1049                         return result > 0 ? result : count1;
1050                 result += count1;
1051                 buf += count1;
1052                 count -= count1;
1053         }
1054         return result;
1055 }
1056
1057 /**
1058  * snd_rawmidi_transmit_empty - check whether the output buffer is empty
1059  * @substream: the rawmidi substream
1060  *
1061  * Return: 1 if the internal output buffer is empty, 0 if not.
1062  */
1063 int snd_rawmidi_transmit_empty(struct snd_rawmidi_substream *substream)
1064 {
1065         struct snd_rawmidi_runtime *runtime = substream->runtime;
1066         int result;
1067         unsigned long flags;
1068
1069         if (runtime->buffer == NULL) {
1070                 rmidi_dbg(substream->rmidi,
1071                           "snd_rawmidi_transmit_empty: output is not active!!!\n");
1072                 return 1;
1073         }
1074         spin_lock_irqsave(&runtime->lock, flags);
1075         result = runtime->avail >= runtime->buffer_size;
1076         spin_unlock_irqrestore(&runtime->lock, flags);
1077         return result;
1078 }
1079 EXPORT_SYMBOL(snd_rawmidi_transmit_empty);
1080
1081 /**
1082  * __snd_rawmidi_transmit_peek - copy data from the internal buffer
1083  * @substream: the rawmidi substream
1084  * @buffer: the buffer pointer
1085  * @count: data size to transfer
1086  *
1087  * This is a variant of snd_rawmidi_transmit_peek() without spinlock.
1088  */
1089 int __snd_rawmidi_transmit_peek(struct snd_rawmidi_substream *substream,
1090                               unsigned char *buffer, int count)
1091 {
1092         int result, count1;
1093         struct snd_rawmidi_runtime *runtime = substream->runtime;
1094
1095         if (runtime->buffer == NULL) {
1096                 rmidi_dbg(substream->rmidi,
1097                           "snd_rawmidi_transmit_peek: output is not active!!!\n");
1098                 return -EINVAL;
1099         }
1100         result = 0;
1101         if (runtime->avail >= runtime->buffer_size) {
1102                 /* warning: lowlevel layer MUST trigger down the hardware */
1103                 goto __skip;
1104         }
1105         if (count == 1) {       /* special case, faster code */
1106                 *buffer = runtime->buffer[runtime->hw_ptr];
1107                 result++;
1108         } else {
1109                 count1 = runtime->buffer_size - runtime->hw_ptr;
1110                 if (count1 > count)
1111                         count1 = count;
1112                 if (count1 > (int)(runtime->buffer_size - runtime->avail))
1113                         count1 = runtime->buffer_size - runtime->avail;
1114                 memcpy(buffer, runtime->buffer + runtime->hw_ptr, count1);
1115                 count -= count1;
1116                 result += count1;
1117                 if (count > 0) {
1118                         if (count > (int)(runtime->buffer_size - runtime->avail - count1))
1119                                 count = runtime->buffer_size - runtime->avail - count1;
1120                         memcpy(buffer + count1, runtime->buffer, count);
1121                         result += count;
1122                 }
1123         }
1124       __skip:
1125         return result;
1126 }
1127 EXPORT_SYMBOL(__snd_rawmidi_transmit_peek);
1128
1129 /**
1130  * snd_rawmidi_transmit_peek - copy data from the internal buffer
1131  * @substream: the rawmidi substream
1132  * @buffer: the buffer pointer
1133  * @count: data size to transfer
1134  *
1135  * Copies data from the internal output buffer to the given buffer.
1136  *
1137  * Call this in the interrupt handler when the midi output is ready,
1138  * and call snd_rawmidi_transmit_ack() after the transmission is
1139  * finished.
1140  *
1141  * Return: The size of copied data, or a negative error code on failure.
1142  */
1143 int snd_rawmidi_transmit_peek(struct snd_rawmidi_substream *substream,
1144                               unsigned char *buffer, int count)
1145 {
1146         struct snd_rawmidi_runtime *runtime = substream->runtime;
1147         int result;
1148         unsigned long flags;
1149
1150         spin_lock_irqsave(&runtime->lock, flags);
1151         result = __snd_rawmidi_transmit_peek(substream, buffer, count);
1152         spin_unlock_irqrestore(&runtime->lock, flags);
1153         return result;
1154 }
1155 EXPORT_SYMBOL(snd_rawmidi_transmit_peek);
1156
1157 /**
1158  * __snd_rawmidi_transmit_ack - acknowledge the transmission
1159  * @substream: the rawmidi substream
1160  * @count: the transferred count
1161  *
1162  * This is a variant of __snd_rawmidi_transmit_ack() without spinlock.
1163  */
1164 int __snd_rawmidi_transmit_ack(struct snd_rawmidi_substream *substream, int count)
1165 {
1166         struct snd_rawmidi_runtime *runtime = substream->runtime;
1167
1168         if (runtime->buffer == NULL) {
1169                 rmidi_dbg(substream->rmidi,
1170                           "snd_rawmidi_transmit_ack: output is not active!!!\n");
1171                 return -EINVAL;
1172         }
1173         snd_BUG_ON(runtime->avail + count > runtime->buffer_size);
1174         runtime->hw_ptr += count;
1175         runtime->hw_ptr %= runtime->buffer_size;
1176         runtime->avail += count;
1177         substream->bytes += count;
1178         if (count > 0) {
1179                 if (runtime->drain || snd_rawmidi_ready(substream))
1180                         wake_up(&runtime->sleep);
1181         }
1182         return count;
1183 }
1184 EXPORT_SYMBOL(__snd_rawmidi_transmit_ack);
1185
1186 /**
1187  * snd_rawmidi_transmit_ack - acknowledge the transmission
1188  * @substream: the rawmidi substream
1189  * @count: the transferred count
1190  *
1191  * Advances the hardware pointer for the internal output buffer with
1192  * the given size and updates the condition.
1193  * Call after the transmission is finished.
1194  *
1195  * Return: The advanced size if successful, or a negative error code on failure.
1196  */
1197 int snd_rawmidi_transmit_ack(struct snd_rawmidi_substream *substream, int count)
1198 {
1199         struct snd_rawmidi_runtime *runtime = substream->runtime;
1200         int result;
1201         unsigned long flags;
1202
1203         spin_lock_irqsave(&runtime->lock, flags);
1204         result = __snd_rawmidi_transmit_ack(substream, count);
1205         spin_unlock_irqrestore(&runtime->lock, flags);
1206         return result;
1207 }
1208 EXPORT_SYMBOL(snd_rawmidi_transmit_ack);
1209
1210 /**
1211  * snd_rawmidi_transmit - copy from the buffer to the device
1212  * @substream: the rawmidi substream
1213  * @buffer: the buffer pointer
1214  * @count: the data size to transfer
1215  *
1216  * Copies data from the buffer to the device and advances the pointer.
1217  *
1218  * Return: The copied size if successful, or a negative error code on failure.
1219  */
1220 int snd_rawmidi_transmit(struct snd_rawmidi_substream *substream,
1221                          unsigned char *buffer, int count)
1222 {
1223         struct snd_rawmidi_runtime *runtime = substream->runtime;
1224         int result;
1225         unsigned long flags;
1226
1227         spin_lock_irqsave(&runtime->lock, flags);
1228         if (!substream->opened)
1229                 result = -EBADFD;
1230         else {
1231                 count = __snd_rawmidi_transmit_peek(substream, buffer, count);
1232                 if (count <= 0)
1233                         result = count;
1234                 else
1235                         result = __snd_rawmidi_transmit_ack(substream, count);
1236         }
1237         spin_unlock_irqrestore(&runtime->lock, flags);
1238         return result;
1239 }
1240 EXPORT_SYMBOL(snd_rawmidi_transmit);
1241
1242 static long snd_rawmidi_kernel_write1(struct snd_rawmidi_substream *substream,
1243                                       const unsigned char __user *userbuf,
1244                                       const unsigned char *kernelbuf,
1245                                       long count)
1246 {
1247         unsigned long flags;
1248         long count1, result;
1249         struct snd_rawmidi_runtime *runtime = substream->runtime;
1250         unsigned long appl_ptr;
1251
1252         if (!kernelbuf && !userbuf)
1253                 return -EINVAL;
1254         if (snd_BUG_ON(!runtime->buffer))
1255                 return -EINVAL;
1256
1257         result = 0;
1258         spin_lock_irqsave(&runtime->lock, flags);
1259         if (substream->append) {
1260                 if ((long)runtime->avail < count) {
1261                         spin_unlock_irqrestore(&runtime->lock, flags);
1262                         return -EAGAIN;
1263                 }
1264         }
1265         while (count > 0 && runtime->avail > 0) {
1266                 count1 = runtime->buffer_size - runtime->appl_ptr;
1267                 if (count1 > count)
1268                         count1 = count;
1269                 if (count1 > (long)runtime->avail)
1270                         count1 = runtime->avail;
1271
1272                 /* update runtime->appl_ptr before unlocking for userbuf */
1273                 appl_ptr = runtime->appl_ptr;
1274                 runtime->appl_ptr += count1;
1275                 runtime->appl_ptr %= runtime->buffer_size;
1276                 runtime->avail -= count1;
1277
1278                 if (kernelbuf)
1279                         memcpy(runtime->buffer + appl_ptr,
1280                                kernelbuf + result, count1);
1281                 else if (userbuf) {
1282                         spin_unlock_irqrestore(&runtime->lock, flags);
1283                         if (copy_from_user(runtime->buffer + appl_ptr,
1284                                            userbuf + result, count1)) {
1285                                 spin_lock_irqsave(&runtime->lock, flags);
1286                                 result = result > 0 ? result : -EFAULT;
1287                                 goto __end;
1288                         }
1289                         spin_lock_irqsave(&runtime->lock, flags);
1290                 }
1291                 result += count1;
1292                 count -= count1;
1293         }
1294       __end:
1295         count1 = runtime->avail < runtime->buffer_size;
1296         spin_unlock_irqrestore(&runtime->lock, flags);
1297         if (count1)
1298                 snd_rawmidi_output_trigger(substream, 1);
1299         return result;
1300 }
1301
1302 long snd_rawmidi_kernel_write(struct snd_rawmidi_substream *substream,
1303                               const unsigned char *buf, long count)
1304 {
1305         return snd_rawmidi_kernel_write1(substream, NULL, buf, count);
1306 }
1307 EXPORT_SYMBOL(snd_rawmidi_kernel_write);
1308
1309 static ssize_t snd_rawmidi_write(struct file *file, const char __user *buf,
1310                                  size_t count, loff_t *offset)
1311 {
1312         long result, timeout;
1313         int count1;
1314         struct snd_rawmidi_file *rfile;
1315         struct snd_rawmidi_runtime *runtime;
1316         struct snd_rawmidi_substream *substream;
1317
1318         rfile = file->private_data;
1319         substream = rfile->output;
1320         runtime = substream->runtime;
1321         /* we cannot put an atomic message to our buffer */
1322         if (substream->append && count > runtime->buffer_size)
1323                 return -EIO;
1324         result = 0;
1325         while (count > 0) {
1326                 spin_lock_irq(&runtime->lock);
1327                 while (!snd_rawmidi_ready_append(substream, count)) {
1328                         wait_queue_t wait;
1329                         if (file->f_flags & O_NONBLOCK) {
1330                                 spin_unlock_irq(&runtime->lock);
1331                                 return result > 0 ? result : -EAGAIN;
1332                         }
1333                         init_waitqueue_entry(&wait, current);
1334                         add_wait_queue(&runtime->sleep, &wait);
1335                         set_current_state(TASK_INTERRUPTIBLE);
1336                         spin_unlock_irq(&runtime->lock);
1337                         timeout = schedule_timeout(30 * HZ);
1338                         remove_wait_queue(&runtime->sleep, &wait);
1339                         if (rfile->rmidi->card->shutdown)
1340                                 return -ENODEV;
1341                         if (signal_pending(current))
1342                                 return result > 0 ? result : -ERESTARTSYS;
1343                         if (!runtime->avail && !timeout)
1344                                 return result > 0 ? result : -EIO;
1345                         spin_lock_irq(&runtime->lock);
1346                 }
1347                 spin_unlock_irq(&runtime->lock);
1348                 count1 = snd_rawmidi_kernel_write1(substream, buf, NULL, count);
1349                 if (count1 < 0)
1350                         return result > 0 ? result : count1;
1351                 result += count1;
1352                 buf += count1;
1353                 if ((size_t)count1 < count && (file->f_flags & O_NONBLOCK))
1354                         break;
1355                 count -= count1;
1356         }
1357         if (file->f_flags & O_DSYNC) {
1358                 spin_lock_irq(&runtime->lock);
1359                 while (runtime->avail != runtime->buffer_size) {
1360                         wait_queue_t wait;
1361                         unsigned int last_avail = runtime->avail;
1362                         init_waitqueue_entry(&wait, current);
1363                         add_wait_queue(&runtime->sleep, &wait);
1364                         set_current_state(TASK_INTERRUPTIBLE);
1365                         spin_unlock_irq(&runtime->lock);
1366                         timeout = schedule_timeout(30 * HZ);
1367                         remove_wait_queue(&runtime->sleep, &wait);
1368                         if (signal_pending(current))
1369                                 return result > 0 ? result : -ERESTARTSYS;
1370                         if (runtime->avail == last_avail && !timeout)
1371                                 return result > 0 ? result : -EIO;
1372                         spin_lock_irq(&runtime->lock);
1373                 }
1374                 spin_unlock_irq(&runtime->lock);
1375         }
1376         return result;
1377 }
1378
1379 static unsigned int snd_rawmidi_poll(struct file *file, poll_table * wait)
1380 {
1381         struct snd_rawmidi_file *rfile;
1382         struct snd_rawmidi_runtime *runtime;
1383         unsigned int mask;
1384
1385         rfile = file->private_data;
1386         if (rfile->input != NULL) {
1387                 runtime = rfile->input->runtime;
1388                 snd_rawmidi_input_trigger(rfile->input, 1);
1389                 poll_wait(file, &runtime->sleep, wait);
1390         }
1391         if (rfile->output != NULL) {
1392                 runtime = rfile->output->runtime;
1393                 poll_wait(file, &runtime->sleep, wait);
1394         }
1395         mask = 0;
1396         if (rfile->input != NULL) {
1397                 if (snd_rawmidi_ready(rfile->input))
1398                         mask |= POLLIN | POLLRDNORM;
1399         }
1400         if (rfile->output != NULL) {
1401                 if (snd_rawmidi_ready(rfile->output))
1402                         mask |= POLLOUT | POLLWRNORM;
1403         }
1404         return mask;
1405 }
1406
1407 /*
1408  */
1409 #ifdef CONFIG_COMPAT
1410 #include "rawmidi_compat.c"
1411 #else
1412 #define snd_rawmidi_ioctl_compat        NULL
1413 #endif
1414
1415 /*
1416
1417  */
1418
1419 static void snd_rawmidi_proc_info_read(struct snd_info_entry *entry,
1420                                        struct snd_info_buffer *buffer)
1421 {
1422         struct snd_rawmidi *rmidi;
1423         struct snd_rawmidi_substream *substream;
1424         struct snd_rawmidi_runtime *runtime;
1425
1426         rmidi = entry->private_data;
1427         snd_iprintf(buffer, "%s\n\n", rmidi->name);
1428         mutex_lock(&rmidi->open_mutex);
1429         if (rmidi->info_flags & SNDRV_RAWMIDI_INFO_OUTPUT) {
1430                 list_for_each_entry(substream,
1431                                     &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substreams,
1432                                     list) {
1433                         snd_iprintf(buffer,
1434                                     "Output %d\n"
1435                                     "  Tx bytes     : %lu\n",
1436                                     substream->number,
1437                                     (unsigned long) substream->bytes);
1438                         if (substream->opened) {
1439                                 snd_iprintf(buffer,
1440                                     "  Owner PID    : %d\n",
1441                                     pid_vnr(substream->pid));
1442                                 runtime = substream->runtime;
1443                                 snd_iprintf(buffer,
1444                                     "  Mode         : %s\n"
1445                                     "  Buffer size  : %lu\n"
1446                                     "  Avail        : %lu\n",
1447                                     runtime->oss ? "OSS compatible" : "native",
1448                                     (unsigned long) runtime->buffer_size,
1449                                     (unsigned long) runtime->avail);
1450                         }
1451                 }
1452         }
1453         if (rmidi->info_flags & SNDRV_RAWMIDI_INFO_INPUT) {
1454                 list_for_each_entry(substream,
1455                                     &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substreams,
1456                                     list) {
1457                         snd_iprintf(buffer,
1458                                     "Input %d\n"
1459                                     "  Rx bytes     : %lu\n",
1460                                     substream->number,
1461                                     (unsigned long) substream->bytes);
1462                         if (substream->opened) {
1463                                 snd_iprintf(buffer,
1464                                             "  Owner PID    : %d\n",
1465                                             pid_vnr(substream->pid));
1466                                 runtime = substream->runtime;
1467                                 snd_iprintf(buffer,
1468                                             "  Buffer size  : %lu\n"
1469                                             "  Avail        : %lu\n"
1470                                             "  Overruns     : %lu\n",
1471                                             (unsigned long) runtime->buffer_size,
1472                                             (unsigned long) runtime->avail,
1473                                             (unsigned long) runtime->xruns);
1474                         }
1475                 }
1476         }
1477         mutex_unlock(&rmidi->open_mutex);
1478 }
1479
1480 /*
1481  *  Register functions
1482  */
1483
1484 static const struct file_operations snd_rawmidi_f_ops =
1485 {
1486         .owner =        THIS_MODULE,
1487         .read =         snd_rawmidi_read,
1488         .write =        snd_rawmidi_write,
1489         .open =         snd_rawmidi_open,
1490         .release =      snd_rawmidi_release,
1491         .llseek =       no_llseek,
1492         .poll =         snd_rawmidi_poll,
1493         .unlocked_ioctl =       snd_rawmidi_ioctl,
1494         .compat_ioctl = snd_rawmidi_ioctl_compat,
1495 };
1496
1497 static int snd_rawmidi_alloc_substreams(struct snd_rawmidi *rmidi,
1498                                         struct snd_rawmidi_str *stream,
1499                                         int direction,
1500                                         int count)
1501 {
1502         struct snd_rawmidi_substream *substream;
1503         int idx;
1504
1505         for (idx = 0; idx < count; idx++) {
1506                 substream = kzalloc(sizeof(*substream), GFP_KERNEL);
1507                 if (!substream)
1508                         return -ENOMEM;
1509                 substream->stream = direction;
1510                 substream->number = idx;
1511                 substream->rmidi = rmidi;
1512                 substream->pstr = stream;
1513                 list_add_tail(&substream->list, &stream->substreams);
1514                 stream->substream_count++;
1515         }
1516         return 0;
1517 }
1518
1519 static void release_rawmidi_device(struct device *dev)
1520 {
1521         kfree(container_of(dev, struct snd_rawmidi, dev));
1522 }
1523
1524 /**
1525  * snd_rawmidi_new - create a rawmidi instance
1526  * @card: the card instance
1527  * @id: the id string
1528  * @device: the device index
1529  * @output_count: the number of output streams
1530  * @input_count: the number of input streams
1531  * @rrawmidi: the pointer to store the new rawmidi instance
1532  *
1533  * Creates a new rawmidi instance.
1534  * Use snd_rawmidi_set_ops() to set the operators to the new instance.
1535  *
1536  * Return: Zero if successful, or a negative error code on failure.
1537  */
1538 int snd_rawmidi_new(struct snd_card *card, char *id, int device,
1539                     int output_count, int input_count,
1540                     struct snd_rawmidi ** rrawmidi)
1541 {
1542         struct snd_rawmidi *rmidi;
1543         int err;
1544         static struct snd_device_ops ops = {
1545                 .dev_free = snd_rawmidi_dev_free,
1546                 .dev_register = snd_rawmidi_dev_register,
1547                 .dev_disconnect = snd_rawmidi_dev_disconnect,
1548         };
1549
1550         if (snd_BUG_ON(!card))
1551                 return -ENXIO;
1552         if (rrawmidi)
1553                 *rrawmidi = NULL;
1554         rmidi = kzalloc(sizeof(*rmidi), GFP_KERNEL);
1555         if (!rmidi)
1556                 return -ENOMEM;
1557         rmidi->card = card;
1558         rmidi->device = device;
1559         mutex_init(&rmidi->open_mutex);
1560         init_waitqueue_head(&rmidi->open_wait);
1561         INIT_LIST_HEAD(&rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substreams);
1562         INIT_LIST_HEAD(&rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substreams);
1563
1564         if (id != NULL)
1565                 strlcpy(rmidi->id, id, sizeof(rmidi->id));
1566
1567         snd_device_initialize(&rmidi->dev, card);
1568         rmidi->dev.release = release_rawmidi_device;
1569         dev_set_name(&rmidi->dev, "midiC%iD%i", card->number, device);
1570
1571         if ((err = snd_rawmidi_alloc_substreams(rmidi,
1572                                                 &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT],
1573                                                 SNDRV_RAWMIDI_STREAM_INPUT,
1574                                                 input_count)) < 0) {
1575                 snd_rawmidi_free(rmidi);
1576                 return err;
1577         }
1578         if ((err = snd_rawmidi_alloc_substreams(rmidi,
1579                                                 &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT],
1580                                                 SNDRV_RAWMIDI_STREAM_OUTPUT,
1581                                                 output_count)) < 0) {
1582                 snd_rawmidi_free(rmidi);
1583                 return err;
1584         }
1585         if ((err = snd_device_new(card, SNDRV_DEV_RAWMIDI, rmidi, &ops)) < 0) {
1586                 snd_rawmidi_free(rmidi);
1587                 return err;
1588         }
1589         if (rrawmidi)
1590                 *rrawmidi = rmidi;
1591         return 0;
1592 }
1593 EXPORT_SYMBOL(snd_rawmidi_new);
1594
1595 static void snd_rawmidi_free_substreams(struct snd_rawmidi_str *stream)
1596 {
1597         struct snd_rawmidi_substream *substream;
1598
1599         while (!list_empty(&stream->substreams)) {
1600                 substream = list_entry(stream->substreams.next, struct snd_rawmidi_substream, list);
1601                 list_del(&substream->list);
1602                 kfree(substream);
1603         }
1604 }
1605
1606 static int snd_rawmidi_free(struct snd_rawmidi *rmidi)
1607 {
1608         if (!rmidi)
1609                 return 0;
1610
1611         snd_info_free_entry(rmidi->proc_entry);
1612         rmidi->proc_entry = NULL;
1613         mutex_lock(&register_mutex);
1614         if (rmidi->ops && rmidi->ops->dev_unregister)
1615                 rmidi->ops->dev_unregister(rmidi);
1616         mutex_unlock(&register_mutex);
1617
1618         snd_rawmidi_free_substreams(&rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT]);
1619         snd_rawmidi_free_substreams(&rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT]);
1620         if (rmidi->private_free)
1621                 rmidi->private_free(rmidi);
1622         put_device(&rmidi->dev);
1623         return 0;
1624 }
1625
1626 static int snd_rawmidi_dev_free(struct snd_device *device)
1627 {
1628         struct snd_rawmidi *rmidi = device->device_data;
1629         return snd_rawmidi_free(rmidi);
1630 }
1631
1632 #if defined(CONFIG_SND_SEQUENCER) || (defined(MODULE) && defined(CONFIG_SND_SEQUENCER_MODULE))
1633 static void snd_rawmidi_dev_seq_free(struct snd_seq_device *device)
1634 {
1635         struct snd_rawmidi *rmidi = device->private_data;
1636         rmidi->seq_dev = NULL;
1637 }
1638 #endif
1639
1640 static int snd_rawmidi_dev_register(struct snd_device *device)
1641 {
1642         int err;
1643         struct snd_info_entry *entry;
1644         char name[16];
1645         struct snd_rawmidi *rmidi = device->device_data;
1646
1647         if (rmidi->device >= SNDRV_RAWMIDI_DEVICES)
1648                 return -ENOMEM;
1649         mutex_lock(&register_mutex);
1650         if (snd_rawmidi_search(rmidi->card, rmidi->device)) {
1651                 mutex_unlock(&register_mutex);
1652                 return -EBUSY;
1653         }
1654         list_add_tail(&rmidi->list, &snd_rawmidi_devices);
1655         mutex_unlock(&register_mutex);
1656         err = snd_register_device(SNDRV_DEVICE_TYPE_RAWMIDI,
1657                                   rmidi->card, rmidi->device,
1658                                   &snd_rawmidi_f_ops, rmidi, &rmidi->dev);
1659         if (err < 0) {
1660                 rmidi_err(rmidi, "unable to register\n");
1661                 mutex_lock(&register_mutex);
1662                 list_del(&rmidi->list);
1663                 mutex_unlock(&register_mutex);
1664                 return err;
1665         }
1666         if (rmidi->ops && rmidi->ops->dev_register &&
1667             (err = rmidi->ops->dev_register(rmidi)) < 0) {
1668                 snd_unregister_device(&rmidi->dev);
1669                 mutex_lock(&register_mutex);
1670                 list_del(&rmidi->list);
1671                 mutex_unlock(&register_mutex);
1672                 return err;
1673         }
1674 #ifdef CONFIG_SND_OSSEMUL
1675         rmidi->ossreg = 0;
1676         if ((int)rmidi->device == midi_map[rmidi->card->number]) {
1677                 if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_MIDI,
1678                                             rmidi->card, 0, &snd_rawmidi_f_ops,
1679                                             rmidi) < 0) {
1680                         rmidi_err(rmidi,
1681                                   "unable to register OSS rawmidi device %i:%i\n",
1682                                   rmidi->card->number, 0);
1683                 } else {
1684                         rmidi->ossreg++;
1685 #ifdef SNDRV_OSS_INFO_DEV_MIDI
1686                         snd_oss_info_register(SNDRV_OSS_INFO_DEV_MIDI, rmidi->card->number, rmidi->name);
1687 #endif
1688                 }
1689         }
1690         if ((int)rmidi->device == amidi_map[rmidi->card->number]) {
1691                 if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_MIDI,
1692                                             rmidi->card, 1, &snd_rawmidi_f_ops,
1693                                             rmidi) < 0) {
1694                         rmidi_err(rmidi,
1695                                   "unable to register OSS rawmidi device %i:%i\n",
1696                                   rmidi->card->number, 1);
1697                 } else {
1698                         rmidi->ossreg++;
1699                 }
1700         }
1701 #endif /* CONFIG_SND_OSSEMUL */
1702         sprintf(name, "midi%d", rmidi->device);
1703         entry = snd_info_create_card_entry(rmidi->card, name, rmidi->card->proc_root);
1704         if (entry) {
1705                 entry->private_data = rmidi;
1706                 entry->c.text.read = snd_rawmidi_proc_info_read;
1707                 if (snd_info_register(entry) < 0) {
1708                         snd_info_free_entry(entry);
1709                         entry = NULL;
1710                 }
1711         }
1712         rmidi->proc_entry = entry;
1713 #if defined(CONFIG_SND_SEQUENCER) || (defined(MODULE) && defined(CONFIG_SND_SEQUENCER_MODULE))
1714         if (!rmidi->ops || !rmidi->ops->dev_register) { /* own registration mechanism */
1715                 if (snd_seq_device_new(rmidi->card, rmidi->device, SNDRV_SEQ_DEV_ID_MIDISYNTH, 0, &rmidi->seq_dev) >= 0) {
1716                         rmidi->seq_dev->private_data = rmidi;
1717                         rmidi->seq_dev->private_free = snd_rawmidi_dev_seq_free;
1718                         sprintf(rmidi->seq_dev->name, "MIDI %d-%d", rmidi->card->number, rmidi->device);
1719                         snd_device_register(rmidi->card, rmidi->seq_dev);
1720                 }
1721         }
1722 #endif
1723         return 0;
1724 }
1725
1726 static int snd_rawmidi_dev_disconnect(struct snd_device *device)
1727 {
1728         struct snd_rawmidi *rmidi = device->device_data;
1729         int dir;
1730
1731         mutex_lock(&register_mutex);
1732         mutex_lock(&rmidi->open_mutex);
1733         wake_up(&rmidi->open_wait);
1734         list_del_init(&rmidi->list);
1735         for (dir = 0; dir < 2; dir++) {
1736                 struct snd_rawmidi_substream *s;
1737                 list_for_each_entry(s, &rmidi->streams[dir].substreams, list) {
1738                         if (s->runtime)
1739                                 wake_up(&s->runtime->sleep);
1740                 }
1741         }
1742
1743 #ifdef CONFIG_SND_OSSEMUL
1744         if (rmidi->ossreg) {
1745                 if ((int)rmidi->device == midi_map[rmidi->card->number]) {
1746                         snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_MIDI, rmidi->card, 0);
1747 #ifdef SNDRV_OSS_INFO_DEV_MIDI
1748                         snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_MIDI, rmidi->card->number);
1749 #endif
1750                 }
1751                 if ((int)rmidi->device == amidi_map[rmidi->card->number])
1752                         snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_MIDI, rmidi->card, 1);
1753                 rmidi->ossreg = 0;
1754         }
1755 #endif /* CONFIG_SND_OSSEMUL */
1756         snd_unregister_device(&rmidi->dev);
1757         mutex_unlock(&rmidi->open_mutex);
1758         mutex_unlock(&register_mutex);
1759         return 0;
1760 }
1761
1762 /**
1763  * snd_rawmidi_set_ops - set the rawmidi operators
1764  * @rmidi: the rawmidi instance
1765  * @stream: the stream direction, SNDRV_RAWMIDI_STREAM_XXX
1766  * @ops: the operator table
1767  *
1768  * Sets the rawmidi operators for the given stream direction.
1769  */
1770 void snd_rawmidi_set_ops(struct snd_rawmidi *rmidi, int stream,
1771                          struct snd_rawmidi_ops *ops)
1772 {
1773         struct snd_rawmidi_substream *substream;
1774
1775         list_for_each_entry(substream, &rmidi->streams[stream].substreams, list)
1776                 substream->ops = ops;
1777 }
1778 EXPORT_SYMBOL(snd_rawmidi_set_ops);
1779
1780 /*
1781  *  ENTRY functions
1782  */
1783
1784 static int __init alsa_rawmidi_init(void)
1785 {
1786
1787         snd_ctl_register_ioctl(snd_rawmidi_control_ioctl);
1788         snd_ctl_register_ioctl_compat(snd_rawmidi_control_ioctl);
1789 #ifdef CONFIG_SND_OSSEMUL
1790         { int i;
1791         /* check device map table */
1792         for (i = 0; i < SNDRV_CARDS; i++) {
1793                 if (midi_map[i] < 0 || midi_map[i] >= SNDRV_RAWMIDI_DEVICES) {
1794                         pr_err("ALSA: rawmidi: invalid midi_map[%d] = %d\n",
1795                                i, midi_map[i]);
1796                         midi_map[i] = 0;
1797                 }
1798                 if (amidi_map[i] < 0 || amidi_map[i] >= SNDRV_RAWMIDI_DEVICES) {
1799                         pr_err("ALSA: rawmidi: invalid amidi_map[%d] = %d\n",
1800                                i, amidi_map[i]);
1801                         amidi_map[i] = 1;
1802                 }
1803         }
1804         }
1805 #endif /* CONFIG_SND_OSSEMUL */
1806         return 0;
1807 }
1808
1809 static void __exit alsa_rawmidi_exit(void)
1810 {
1811         snd_ctl_unregister_ioctl(snd_rawmidi_control_ioctl);
1812         snd_ctl_unregister_ioctl_compat(snd_rawmidi_control_ioctl);
1813 }
1814
1815 module_init(alsa_rawmidi_init)
1816 module_exit(alsa_rawmidi_exit)