sound/core/pcm_native.c

   1 /*
   2  *  Digital Audio (PCM) abstract layer
   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 <linux/mm.h>
  23 #include <linux/file.h>
  24 #include <linux/slab.h>
  25 #include <linux/smp_lock.h>
  26 #include <linux/time.h>
  27 #include <linux/pm_qos_params.h>
  28 #include <linux/uio.h>
  29 #include <sound/core.h>
  30 #include <sound/control.h>
  31 #include <sound/info.h>
  32 #include <sound/pcm.h>
  33 #include <sound/pcm_params.h>
  34 #include <sound/timer.h>
  35 #include <sound/minors.h>
  36 #include <asm/io.h>
  37
  38 /*
  39  *  Compatibility
  40  */
  41
  42 struct snd_pcm_hw_params_old {
  43         unsigned int flags;
  44         unsigned int masks[SNDRV_PCM_HW_PARAM_SUBFORMAT -
  45                            SNDRV_PCM_HW_PARAM_ACCESS + 1];
  46         struct snd_interval intervals[SNDRV_PCM_HW_PARAM_TICK_TIME -
  47                                         SNDRV_PCM_HW_PARAM_SAMPLE_BITS + 1];
  48         unsigned int rmask;
  49         unsigned int cmask;
  50         unsigned int info;
  51         unsigned int msbits;
  52         unsigned int rate_num;
  53         unsigned int rate_den;
  54         snd_pcm_uframes_t fifo_size;
  55         unsigned char reserved[64];
  56 };
  57
  58 #ifdef CONFIG_SND_SUPPORT_OLD_API
  59 #define SNDRV_PCM_IOCTL_HW_REFINE_OLD _IOWR('A', 0x10, struct snd_pcm_hw_params_old)
  60 #define SNDRV_PCM_IOCTL_HW_PARAMS_OLD _IOWR('A', 0x11, struct snd_pcm_hw_params_old)
  61
  62 static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream,
  63                                       struct snd_pcm_hw_params_old __user * _oparams);
  64 static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream,
  65                                       struct snd_pcm_hw_params_old __user * _oparams);
  66 #endif
  67 static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream);
  68
  69 /*
  70  *
  71  */
  72
  73 DEFINE_RWLOCK(snd_pcm_link_rwlock);
  74 EXPORT_SYMBOL(snd_pcm_link_rwlock);
  75
  76 static DECLARE_RWSEM(snd_pcm_link_rwsem);
  77
  78 static inline mm_segment_t snd_enter_user(void)
  79 {
  80         mm_segment_t fs = get_fs();
  81         set_fs(get_ds());
  82         return fs;
  83 }
  84
  85 static inline void snd_leave_user(mm_segment_t fs)
  86 {
  87         set_fs(fs);
  88 }
  89
  90
  91
  92 int snd_pcm_info(struct snd_pcm_substream *substream, struct snd_pcm_info *info)
  93 {
  94         struct snd_pcm_runtime *runtime;
  95         struct snd_pcm *pcm = substream->pcm;
  96         struct snd_pcm_str *pstr = substream->pstr;
  97
  98         memset(info, 0, sizeof(*info));
  99         info->card = pcm->card->number;
 100         info->device = pcm->device;
 101         info->stream = substream->stream;
 102         info->subdevice = substream->number;
 103         strlcpy(info->id, pcm->id, sizeof(info->id));
 104         strlcpy(info->name, pcm->name, sizeof(info->name));
 105         info->dev_class = pcm->dev_class;
 106         info->dev_subclass = pcm->dev_subclass;
 107         info->subdevices_count = pstr->substream_count;
 108         info->subdevices_avail = pstr->substream_count - pstr->substream_opened;
 109         strlcpy(info->subname, substream->name, sizeof(info->subname));
 110         runtime = substream->runtime;
 111         /* AB: FIXME!!! This is definitely nonsense */
 112         if (runtime) {
 113                 info->sync = runtime->sync;
 114                 substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_INFO, info);
 115         }
 116         return 0;
 117 }
 118
 119 int snd_pcm_info_user(struct snd_pcm_substream *substream,
 120                       struct snd_pcm_info __user * _info)
 121 {
 122         struct snd_pcm_info *info;
 123         int err;
 124
 125         info = kmalloc(sizeof(*info), GFP_KERNEL);
 126         if (! info)
 127                 return -ENOMEM;
 128         err = snd_pcm_info(substream, info);
 129         if (err >= 0) {
 130                 if (copy_to_user(_info, info, sizeof(*info)))
 131                         err = -EFAULT;
 132         }
 133         kfree(info);
 134         return err;
 135 }
 136
 137 #undef RULES_DEBUG
 138
 139 #ifdef RULES_DEBUG
 140 #define HW_PARAM(v) [SNDRV_PCM_HW_PARAM_##v] = #v
 141 char *snd_pcm_hw_param_names[] = {
 142         HW_PARAM(ACCESS),
 143         HW_PARAM(FORMAT),
 144         HW_PARAM(SUBFORMAT),
 145         HW_PARAM(SAMPLE_BITS),
 146         HW_PARAM(FRAME_BITS),
 147         HW_PARAM(CHANNELS),
 148         HW_PARAM(RATE),
 149         HW_PARAM(PERIOD_TIME),
 150         HW_PARAM(PERIOD_SIZE),
 151         HW_PARAM(PERIOD_BYTES),
 152         HW_PARAM(PERIODS),
 153         HW_PARAM(BUFFER_TIME),
 154         HW_PARAM(BUFFER_SIZE),
 155         HW_PARAM(BUFFER_BYTES),
 156         HW_PARAM(TICK_TIME),
 157 };
 158 #endif
 159
 160 int snd_pcm_hw_refine(struct snd_pcm_substream *substream,
 161                       struct snd_pcm_hw_params *params)
 162 {
 163         unsigned int k;
 164         struct snd_pcm_hardware *hw;
 165         struct snd_interval *i = NULL;
 166         struct snd_mask *m = NULL;
 167         struct snd_pcm_hw_constraints *constrs = &substream->runtime->hw_constraints;
 168         unsigned int rstamps[constrs->rules_num];
 169         unsigned int vstamps[SNDRV_PCM_HW_PARAM_LAST_INTERVAL + 1];
 170         unsigned int stamp = 2;
 171         int changed, again;
 172
 173         params->info = 0;
 174         params->fifo_size = 0;
 175         if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_SAMPLE_BITS))
 176                 params->msbits = 0;
 177         if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_RATE)) {
 178                 params->rate_num = 0;
 179                 params->rate_den = 0;
 180         }
 181
 182         for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
 183                 m = hw_param_mask(params, k);
 184                 if (snd_mask_empty(m))
 185                         return -EINVAL;
 186                 if (!(params->rmask & (1 << k)))
 187                         continue;
 188 #ifdef RULES_DEBUG
 189                 printk(KERN_DEBUG "%s = ", snd_pcm_hw_param_names[k]);
 190                 printk("%04x%04x%04x%04x -> ", m->bits[3], m->bits[2], m->bits[1], m->bits[0]);
 191 #endif
 192                 changed = snd_mask_refine(m, constrs_mask(constrs, k));
 193 #ifdef RULES_DEBUG
 194                 printk("%04x%04x%04x%04x\n", m->bits[3], m->bits[2], m->bits[1], m->bits[0]);
 195 #endif
 196                 if (changed)
 197                         params->cmask |= 1 << k;
 198                 if (changed < 0)
 199                         return changed;
 200         }
 201
 202         for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
 203                 i = hw_param_interval(params, k);
 204                 if (snd_interval_empty(i))
 205                         return -EINVAL;
 206                 if (!(params->rmask & (1 << k)))
 207                         continue;
 208 #ifdef RULES_DEBUG
 209                 printk(KERN_DEBUG "%s = ", snd_pcm_hw_param_names[k]);
 210                 if (i->empty)
 211                         printk("empty");
 212                 else
 213                         printk("%c%u %u%c",
 214                                i->openmin ? '(' : '[', i->min,
 215                                i->max, i->openmax ? ')' : ']');
 216                 printk(" -> ");
 217 #endif
 218                 changed = snd_interval_refine(i, constrs_interval(constrs, k));
 219 #ifdef RULES_DEBUG
 220                 if (i->empty)
 221                         printk("empty\n");
 222                 else
 223                         printk("%c%u %u%c\n",
 224                                i->openmin ? '(' : '[', i->min,
 225                                i->max, i->openmax ? ')' : ']');
 226 #endif
 227                 if (changed)
 228                         params->cmask |= 1 << k;
 229                 if (changed < 0)
 230                         return changed;
 231         }
 232
 233         for (k = 0; k < constrs->rules_num; k++)
 234                 rstamps[k] = 0;
 235         for (k = 0; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++)
 236                 vstamps[k] = (params->rmask & (1 << k)) ? 1 : 0;
 237         do {
 238                 again = 0;
 239                 for (k = 0; k < constrs->rules_num; k++) {
 240                         struct snd_pcm_hw_rule *r = &constrs->rules[k];
 241                         unsigned int d;
 242                         int doit = 0;
 243                         if (r->cond && !(r->cond & params->flags))
 244                                 continue;
 245                         for (d = 0; r->deps[d] >= 0; d++) {
 246                                 if (vstamps[r->deps[d]] > rstamps[k]) {
 247                                         doit = 1;
 248                                         break;
 249                                 }
 250                         }
 251                         if (!doit)
 252                                 continue;
 253 #ifdef RULES_DEBUG
 254                         printk(KERN_DEBUG "Rule %d [%p]: ", k, r->func);
 255                         if (r->var >= 0) {
 256                                 printk("%s = ", snd_pcm_hw_param_names[r->var]);
 257                                 if (hw_is_mask(r->var)) {
 258                                         m = hw_param_mask(params, r->var);
 259                                         printk("%x", *m->bits);
 260                                 } else {
 261                                         i = hw_param_interval(params, r->var);
 262                                         if (i->empty)
 263                                                 printk("empty");
 264                                         else
 265                                                 printk("%c%u %u%c",
 266                                                        i->openmin ? '(' : '[', i->min,
 267                                                        i->max, i->openmax ? ')' : ']');
 268                                 }
 269                         }
 270 #endif
 271                         changed = r->func(params, r);
 272 #ifdef RULES_DEBUG
 273                         if (r->var >= 0) {
 274                                 printk(" -> ");
 275                                 if (hw_is_mask(r->var))
 276                                         printk("%x", *m->bits);
 277                                 else {
 278                                         if (i->empty)
 279                                                 printk("empty");
 280                                         else
 281                                                 printk("%c%u %u%c",
 282                                                        i->openmin ? '(' : '[', i->min,
 283                                                        i->max, i->openmax ? ')' : ']');
 284                                 }
 285                         }
 286                         printk("\n");
 287 #endif
 288                         rstamps[k] = stamp;
 289                         if (changed && r->var >= 0) {
 290                                 params->cmask |= (1 << r->var);
 291                                 vstamps[r->var] = stamp;
 292                                 again = 1;
 293                         }
 294                         if (changed < 0)
 295                                 return changed;
 296                         stamp++;
 297                 }
 298         } while (again);
 299         if (!params->msbits) {
 300                 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS);
 301                 if (snd_interval_single(i))
 302                         params->msbits = snd_interval_value(i);
 303         }
 304
 305         if (!params->rate_den) {
 306                 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
 307                 if (snd_interval_single(i)) {
 308                         params->rate_num = snd_interval_value(i);
 309                         params->rate_den = 1;
 310                 }
 311         }
 312
 313         hw = &substream->runtime->hw;
 314         if (!params->info)
 315                 params->info = hw->info;
 316         if (!params->fifo_size)
 317                 params->fifo_size = hw->fifo_size;
 318         params->rmask = 0;
 319         return 0;
 320 }
 321
 322 EXPORT_SYMBOL(snd_pcm_hw_refine);
 323
 324 static int snd_pcm_hw_refine_user(struct snd_pcm_substream *substream,
 325                                   struct snd_pcm_hw_params __user * _params)
 326 {
 327         struct snd_pcm_hw_params *params;
 328         int err;
 329
 330         params = memdup_user(_params, sizeof(*params));
 331         if (IS_ERR(params))
 332                 return PTR_ERR(params);
 333
 334         err = snd_pcm_hw_refine(substream, params);
 335         if (copy_to_user(_params, params, sizeof(*params))) {
 336                 if (!err)
 337                         err = -EFAULT;
 338         }
 339
 340         kfree(params);
 341         return err;
 342 }
 343
 344 static int period_to_usecs(struct snd_pcm_runtime *runtime)
 345 {
 346         int usecs;
 347
 348         if (! runtime->rate)
 349                 return -1; /* invalid */
 350
 351         /* take 75% of period time as the deadline */
 352         usecs = (750000 / runtime->rate) * runtime->period_size;
 353         usecs += ((750000 % runtime->rate) * runtime->period_size) /
 354                 runtime->rate;
 355
 356         return usecs;
 357 }
 358
 359 static int snd_pcm_hw_params(struct snd_pcm_substream *substream,
 360                              struct snd_pcm_hw_params *params)
 361 {
 362         struct snd_pcm_runtime *runtime;
 363         int err, usecs;
 364         unsigned int bits;
 365         snd_pcm_uframes_t frames;
 366
 367         if (PCM_RUNTIME_CHECK(substream))
 368                 return -ENXIO;
 369         runtime = substream->runtime;
 370         snd_pcm_stream_lock_irq(substream);
 371         switch (runtime->status->state) {
 372         case SNDRV_PCM_STATE_OPEN:
 373         case SNDRV_PCM_STATE_SETUP:
 374         case SNDRV_PCM_STATE_PREPARED:
 375                 break;
 376         default:
 377                 snd_pcm_stream_unlock_irq(substream);
 378                 return -EBADFD;
 379         }
 380         snd_pcm_stream_unlock_irq(substream);
 381 #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
 382         if (!substream->oss.oss)
 383 #endif
 384                 if (atomic_read(&substream->mmap_count))
 385                         return -EBADFD;
 386
 387         params->rmask = ~0U;
 388         err = snd_pcm_hw_refine(substream, params);
 389         if (err < 0)
 390                 goto _error;
 391
 392         err = snd_pcm_hw_params_choose(substream, params);
 393         if (err < 0)
 394                 goto _error;
 395
 396         if (substream->ops->hw_params != NULL) {
 397                 err = substream->ops->hw_params(substream, params);
 398                 if (err < 0)
 399                         goto _error;
 400         }
 401
 402         runtime->access = params_access(params);
 403         runtime->format = params_format(params);
 404         runtime->subformat = params_subformat(params);
 405         runtime->channels = params_channels(params);
 406         runtime->rate = params_rate(params);
 407         runtime->period_size = params_period_size(params);
 408         runtime->periods = params_periods(params);
 409         runtime->buffer_size = params_buffer_size(params);
 410         runtime->info = params->info;
 411         runtime->rate_num = params->rate_num;
 412         runtime->rate_den = params->rate_den;
 413
 414         bits = snd_pcm_format_physical_width(runtime->format);
 415         runtime->sample_bits = bits;
 416         bits *= runtime->channels;
 417         runtime->frame_bits = bits;
 418         frames = 1;
 419         while (bits % 8 != 0) {
 420                 bits *= 2;
 421                 frames *= 2;
 422         }
 423         runtime->byte_align = bits / 8;
 424         runtime->min_align = frames;
 425
 426         /* Default sw params */
 427         runtime->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
 428         runtime->period_step = 1;
 429         runtime->control->avail_min = runtime->period_size;
 430         runtime->start_threshold = 1;
 431         runtime->stop_threshold = runtime->buffer_size;
 432         runtime->silence_threshold = 0;
 433         runtime->silence_size = 0;
 434         runtime->boundary = runtime->buffer_size;
 435         while (runtime->boundary * 2 <= LONG_MAX - runtime->buffer_size)
 436                 runtime->boundary *= 2;
 437
 438         snd_pcm_timer_resolution_change(substream);
 439         runtime->status->state = SNDRV_PCM_STATE_SETUP;
 440
 441         pm_qos_remove_requirement(PM_QOS_CPU_DMA_LATENCY,
 442                                 substream->latency_id);
 443         if ((usecs = period_to_usecs(runtime)) >= 0)
 444                 pm_qos_add_requirement(PM_QOS_CPU_DMA_LATENCY,
 445                                         substream->latency_id, usecs);
 446         return 0;
 447  _error:
 448         /* hardware might be unuseable from this time,
 449            so we force application to retry to set
 450            the correct hardware parameter settings */
 451         runtime->status->state = SNDRV_PCM_STATE_OPEN;
 452         if (substream->ops->hw_free != NULL)
 453                 substream->ops->hw_free(substream);
 454         return err;
 455 }
 456
 457 static int snd_pcm_hw_params_user(struct snd_pcm_substream *substream,
 458                                   struct snd_pcm_hw_params __user * _params)
 459 {
 460         struct snd_pcm_hw_params *params;
 461         int err;
 462
 463         params = memdup_user(_params, sizeof(*params));
 464         if (IS_ERR(params))
 465                 return PTR_ERR(params);
 466
 467         err = snd_pcm_hw_params(substream, params);
 468         if (copy_to_user(_params, params, sizeof(*params))) {
 469                 if (!err)
 470                         err = -EFAULT;
 471         }
 472
 473         kfree(params);
 474         return err;
 475 }
 476
 477 static int snd_pcm_hw_free(struct snd_pcm_substream *substream)
 478 {
 479         struct snd_pcm_runtime *runtime;
 480         int result = 0;
 481
 482         if (PCM_RUNTIME_CHECK(substream))
 483                 return -ENXIO;
 484         runtime = substream->runtime;
 485         snd_pcm_stream_lock_irq(substream);
 486         switch (runtime->status->state) {
 487         case SNDRV_PCM_STATE_SETUP:
 488         case SNDRV_PCM_STATE_PREPARED:
 489                 break;
 490         default:
 491                 snd_pcm_stream_unlock_irq(substream);
 492                 return -EBADFD;
 493         }
 494         snd_pcm_stream_unlock_irq(substream);
 495         if (atomic_read(&substream->mmap_count))
 496                 return -EBADFD;
 497         if (substream->ops->hw_free)
 498                 result = substream->ops->hw_free(substream);
 499         runtime->status->state = SNDRV_PCM_STATE_OPEN;
 500         pm_qos_remove_requirement(PM_QOS_CPU_DMA_LATENCY,
 501                 substream->latency_id);
 502         return result;
 503 }
 504
 505 static int snd_pcm_sw_params(struct snd_pcm_substream *substream,
 506                              struct snd_pcm_sw_params *params)
 507 {
 508         struct snd_pcm_runtime *runtime;
 509
 510         if (PCM_RUNTIME_CHECK(substream))
 511                 return -ENXIO;
 512         runtime = substream->runtime;
 513         snd_pcm_stream_lock_irq(substream);
 514         if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
 515                 snd_pcm_stream_unlock_irq(substream);
 516                 return -EBADFD;
 517         }
 518         snd_pcm_stream_unlock_irq(substream);
 519
 520         if (params->tstamp_mode > SNDRV_PCM_TSTAMP_LAST)
 521                 return -EINVAL;
 522         if (params->avail_min == 0)
 523                 return -EINVAL;
 524         if (params->silence_size >= runtime->boundary) {
 525                 if (params->silence_threshold != 0)
 526                         return -EINVAL;
 527         } else {
 528                 if (params->silence_size > params->silence_threshold)
 529                         return -EINVAL;
 530                 if (params->silence_threshold > runtime->buffer_size)
 531                         return -EINVAL;
 532         }
 533         snd_pcm_stream_lock_irq(substream);
 534         runtime->tstamp_mode = params->tstamp_mode;
 535         runtime->period_step = params->period_step;
 536         runtime->control->avail_min = params->avail_min;
 537         runtime->start_threshold = params->start_threshold;
 538         runtime->stop_threshold = params->stop_threshold;
 539         runtime->silence_threshold = params->silence_threshold;
 540         runtime->silence_size = params->silence_size;
 541         params->boundary = runtime->boundary;
 542         if (snd_pcm_running(substream)) {
 543                 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
 544                     runtime->silence_size > 0)
 545                         snd_pcm_playback_silence(substream, ULONG_MAX);
 546                 wake_up(&runtime->sleep);
 547         }
 548         snd_pcm_stream_unlock_irq(substream);
 549         return 0;
 550 }
 551
 552 static int snd_pcm_sw_params_user(struct snd_pcm_substream *substream,
 553                                   struct snd_pcm_sw_params __user * _params)
 554 {
 555         struct snd_pcm_sw_params params;
 556         int err;
 557         if (copy_from_user(&params, _params, sizeof(params)))
 558                 return -EFAULT;
 559         err = snd_pcm_sw_params(substream, &params);
 560         if (copy_to_user(_params, &params, sizeof(params)))
 561                 return -EFAULT;
 562         return err;
 563 }
 564
 565 int snd_pcm_status(struct snd_pcm_substream *substream,
 566                    struct snd_pcm_status *status)
 567 {
 568         struct snd_pcm_runtime *runtime = substream->runtime;
 569
 570         snd_pcm_stream_lock_irq(substream);
 571         status->state = runtime->status->state;
 572         status->suspended_state = runtime->status->suspended_state;
 573         if (status->state == SNDRV_PCM_STATE_OPEN)
 574                 goto _end;
 575         status->trigger_tstamp = runtime->trigger_tstamp;
 576         if (snd_pcm_running(substream)) {
 577                 snd_pcm_update_hw_ptr(substream);
 578                 if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) {
 579                         status->tstamp = runtime->status->tstamp;
 580                         goto _tstamp_end;
 581                 }
 582         }
 583         snd_pcm_gettime(runtime, &status->tstamp);
 584  _tstamp_end:
 585         status->appl_ptr = runtime->control->appl_ptr;
 586         status->hw_ptr = runtime->status->hw_ptr;
 587         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 588                 status->avail = snd_pcm_playback_avail(runtime);
 589                 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING ||
 590                     runtime->status->state == SNDRV_PCM_STATE_DRAINING)
 591                         status->delay = runtime->buffer_size - status->avail;
 592                 else
 593                         status->delay = 0;
 594         } else {
 595                 status->avail = snd_pcm_capture_avail(runtime);
 596                 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING)
 597                         status->delay = status->avail;
 598                 else
 599                         status->delay = 0;
 600         }
 601         status->avail_max = runtime->avail_max;
 602         status->overrange = runtime->overrange;
 603         runtime->avail_max = 0;
 604         runtime->overrange = 0;
 605  _end:
 606         snd_pcm_stream_unlock_irq(substream);
 607         return 0;
 608 }
 609
 610 static int snd_pcm_status_user(struct snd_pcm_substream *substream,
 611                                struct snd_pcm_status __user * _status)
 612 {
 613         struct snd_pcm_status status;
 614         int res;
 615
 616         memset(&status, 0, sizeof(status));
 617         res = snd_pcm_status(substream, &status);
 618         if (res < 0)
 619                 return res;
 620         if (copy_to_user(_status, &status, sizeof(status)))
 621                 return -EFAULT;
 622         return 0;
 623 }
 624
 625 static int snd_pcm_channel_info(struct snd_pcm_substream *substream,
 626                                 struct snd_pcm_channel_info * info)
 627 {
 628         struct snd_pcm_runtime *runtime;
 629         unsigned int channel;
 630
 631         channel = info->channel;
 632         runtime = substream->runtime;
 633         snd_pcm_stream_lock_irq(substream);
 634         if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
 635                 snd_pcm_stream_unlock_irq(substream);
 636                 return -EBADFD;
 637         }
 638         snd_pcm_stream_unlock_irq(substream);
 639         if (channel >= runtime->channels)
 640                 return -EINVAL;
 641         memset(info, 0, sizeof(*info));
 642         info->channel = channel;
 643         return substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_CHANNEL_INFO, info);
 644 }
 645
 646 static int snd_pcm_channel_info_user(struct snd_pcm_substream *substream,
 647                                      struct snd_pcm_channel_info __user * _info)
 648 {
 649         struct snd_pcm_channel_info info;
 650         int res;
 651
 652         if (copy_from_user(&info, _info, sizeof(info)))
 653                 return -EFAULT;
 654         res = snd_pcm_channel_info(substream, &info);
 655         if (res < 0)
 656                 return res;
 657         if (copy_to_user(_info, &info, sizeof(info)))
 658                 return -EFAULT;
 659         return 0;
 660 }
 661
 662 static void snd_pcm_trigger_tstamp(struct snd_pcm_substream *substream)
 663 {
 664         struct snd_pcm_runtime *runtime = substream->runtime;
 665         if (runtime->trigger_master == NULL)
 666                 return;
 667         if (runtime->trigger_master == substream) {
 668                 snd_pcm_gettime(runtime, &runtime->trigger_tstamp);
 669         } else {
 670                 snd_pcm_trigger_tstamp(runtime->trigger_master);
 671                 runtime->trigger_tstamp = runtime->trigger_master->runtime->trigger_tstamp;
 672         }
 673         runtime->trigger_master = NULL;
 674 }
 675
 676 struct action_ops {
 677         int (*pre_action)(struct snd_pcm_substream *substream, int state);
 678         int (*do_action)(struct snd_pcm_substream *substream, int state);
 679         void (*undo_action)(struct snd_pcm_substream *substream, int state);
 680         void (*post_action)(struct snd_pcm_substream *substream, int state);
 681 };
 682
 683 /*
 684  *  this functions is core for handling of linked stream
 685  *  Note: the stream state might be changed also on failure
 686  *  Note2: call with calling stream lock + link lock
 687  */
 688 static int snd_pcm_action_group(struct action_ops *ops,
 689                                 struct snd_pcm_substream *substream,
 690                                 int state, int do_lock)
 691 {
 692         struct snd_pcm_substream *s = NULL;
 693         struct snd_pcm_substream *s1;
 694         int res = 0;
 695
 696         snd_pcm_group_for_each_entry(s, substream) {
 697                 if (do_lock && s != substream)
 698                         spin_lock_nested(&s->self_group.lock,
 699                                          SINGLE_DEPTH_NESTING);
 700                 res = ops->pre_action(s, state);
 701                 if (res < 0)
 702                         goto _unlock;
 703         }
 704         snd_pcm_group_for_each_entry(s, substream) {
 705                 res = ops->do_action(s, state);
 706                 if (res < 0) {
 707                         if (ops->undo_action) {
 708                                 snd_pcm_group_for_each_entry(s1, substream) {
 709                                         if (s1 == s) /* failed stream */
 710                                                 break;
 711                                         ops->undo_action(s1, state);
 712                                 }
 713                         }
 714                         s = NULL; /* unlock all */
 715                         goto _unlock;
 716                 }
 717         }
 718         snd_pcm_group_for_each_entry(s, substream) {
 719                 ops->post_action(s, state);
 720         }
 721  _unlock:
 722         if (do_lock) {
 723                 /* unlock streams */
 724                 snd_pcm_group_for_each_entry(s1, substream) {
 725                         if (s1 != substream)
 726                                 spin_unlock(&s1->self_group.lock);
 727                         if (s1 == s)    /* end */
 728                                 break;
 729                 }
 730         }
 731         return res;
 732 }
 733
 734 /*
 735  *  Note: call with stream lock
 736  */
 737 static int snd_pcm_action_single(struct action_ops *ops,
 738                                  struct snd_pcm_substream *substream,
 739                                  int state)
 740 {
 741         int res;
 742
 743         res = ops->pre_action(substream, state);
 744         if (res < 0)
 745                 return res;
 746         res = ops->do_action(substream, state);
 747         if (res == 0)
 748                 ops->post_action(substream, state);
 749         else if (ops->undo_action)
 750                 ops->undo_action(substream, state);
 751         return res;
 752 }
 753
 754 /*
 755  *  Note: call with stream lock
 756  */
 757 static int snd_pcm_action(struct action_ops *ops,
 758                           struct snd_pcm_substream *substream,
 759                           int state)
 760 {
 761         int res;
 762
 763         if (snd_pcm_stream_linked(substream)) {
 764                 if (!spin_trylock(&substream->group->lock)) {
 765                         spin_unlock(&substream->self_group.lock);
 766                         spin_lock(&substream->group->lock);
 767                         spin_lock(&substream->self_group.lock);
 768                 }
 769                 res = snd_pcm_action_group(ops, substream, state, 1);
 770                 spin_unlock(&substream->group->lock);
 771         } else {
 772                 res = snd_pcm_action_single(ops, substream, state);
 773         }
 774         return res;
 775 }
 776
 777 /*
 778  *  Note: don't use any locks before
 779  */
 780 static int snd_pcm_action_lock_irq(struct action_ops *ops,
 781                                    struct snd_pcm_substream *substream,
 782                                    int state)
 783 {
 784         int res;
 785
 786         read_lock_irq(&snd_pcm_link_rwlock);
 787         if (snd_pcm_stream_linked(substream)) {
 788                 spin_lock(&substream->group->lock);
 789                 spin_lock(&substream->self_group.lock);
 790                 res = snd_pcm_action_group(ops, substream, state, 1);
 791                 spin_unlock(&substream->self_group.lock);
 792                 spin_unlock(&substream->group->lock);
 793         } else {
 794                 spin_lock(&substream->self_group.lock);
 795                 res = snd_pcm_action_single(ops, substream, state);
 796                 spin_unlock(&substream->self_group.lock);
 797         }
 798         read_unlock_irq(&snd_pcm_link_rwlock);
 799         return res;
 800 }
 801
 802 /*
 803  */
 804 static int snd_pcm_action_nonatomic(struct action_ops *ops,
 805                                     struct snd_pcm_substream *substream,
 806                                     int state)
 807 {
 808         int res;
 809
 810         down_read(&snd_pcm_link_rwsem);
 811         if (snd_pcm_stream_linked(substream))
 812                 res = snd_pcm_action_group(ops, substream, state, 0);
 813         else
 814                 res = snd_pcm_action_single(ops, substream, state);
 815         up_read(&snd_pcm_link_rwsem);
 816         return res;
 817 }
 818
 819 /*
 820  * start callbacks
 821  */
 822 static int snd_pcm_pre_start(struct snd_pcm_substream *substream, int state)
 823 {
 824         struct snd_pcm_runtime *runtime = substream->runtime;
 825         if (runtime->status->state != SNDRV_PCM_STATE_PREPARED)
 826                 return -EBADFD;
 827         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
 828             !snd_pcm_playback_data(substream))
 829                 return -EPIPE;
 830         runtime->trigger_master = substream;
 831         return 0;
 832 }
 833
 834 static int snd_pcm_do_start(struct snd_pcm_substream *substream, int state)
 835 {
 836         if (substream->runtime->trigger_master != substream)
 837                 return 0;
 838         return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_START);
 839 }
 840
 841 static void snd_pcm_undo_start(struct snd_pcm_substream *substream, int state)
 842 {
 843         if (substream->runtime->trigger_master == substream)
 844                 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
 845 }
 846
 847 static void snd_pcm_post_start(struct snd_pcm_substream *substream, int state)
 848 {
 849         struct snd_pcm_runtime *runtime = substream->runtime;
 850         snd_pcm_trigger_tstamp(substream);
 851         runtime->status->state = state;
 852         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
 853             runtime->silence_size > 0)
 854                 snd_pcm_playback_silence(substream, ULONG_MAX);
 855         if (substream->timer)
 856                 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTART,
 857                                  &runtime->trigger_tstamp);
 858 }
 859
 860 static struct action_ops snd_pcm_action_start = {
 861         .pre_action = snd_pcm_pre_start,
 862         .do_action = snd_pcm_do_start,
 863         .undo_action = snd_pcm_undo_start,
 864         .post_action = snd_pcm_post_start
 865 };
 866
 867 /**
 868  * snd_pcm_start - start all linked streams
 869  * @substream: the PCM substream instance
 870  */
 871 int snd_pcm_start(struct snd_pcm_substream *substream)
 872 {
 873         return snd_pcm_action(&snd_pcm_action_start, substream,
 874                               SNDRV_PCM_STATE_RUNNING);
 875 }
 876
 877 /*
 878  * stop callbacks
 879  */
 880 static int snd_pcm_pre_stop(struct snd_pcm_substream *substream, int state)
 881 {
 882         struct snd_pcm_runtime *runtime = substream->runtime;
 883         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
 884                 return -EBADFD;
 885         runtime->trigger_master = substream;
 886         return 0;
 887 }
 888
 889 static int snd_pcm_do_stop(struct snd_pcm_substream *substream, int state)
 890 {
 891         if (substream->runtime->trigger_master == substream &&
 892             snd_pcm_running(substream))
 893                 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
 894         return 0; /* unconditonally stop all substreams */
 895 }
 896
 897 static void snd_pcm_post_stop(struct snd_pcm_substream *substream, int state)
 898 {
 899         struct snd_pcm_runtime *runtime = substream->runtime;
 900         if (runtime->status->state != state) {
 901                 snd_pcm_trigger_tstamp(substream);
 902                 if (substream->timer)
 903                         snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTOP,
 904                                          &runtime->trigger_tstamp);
 905                 runtime->status->state = state;
 906         }
 907         wake_up(&runtime->sleep);
 908 }
 909
 910 static struct action_ops snd_pcm_action_stop = {
 911         .pre_action = snd_pcm_pre_stop,
 912         .do_action = snd_pcm_do_stop,
 913         .post_action = snd_pcm_post_stop
 914 };
 915
 916 /**
 917  * snd_pcm_stop - try to stop all running streams in the substream group
 918  * @substream: the PCM substream instance
 919  * @state: PCM state after stopping the stream
 920  *
 921  * The state of each stream is then changed to the given state unconditionally.
 922  */
 923 int snd_pcm_stop(struct snd_pcm_substream *substream, int state)
 924 {
 925         return snd_pcm_action(&snd_pcm_action_stop, substream, state);
 926 }
 927
 928 EXPORT_SYMBOL(snd_pcm_stop);
 929
 930 /**
 931  * snd_pcm_drain_done - stop the DMA only when the given stream is playback
 932  * @substream: the PCM substream
 933  *
 934  * After stopping, the state is changed to SETUP.
 935  * Unlike snd_pcm_stop(), this affects only the given stream.
 936  */
 937 int snd_pcm_drain_done(struct snd_pcm_substream *substream)
 938 {
 939         return snd_pcm_action_single(&snd_pcm_action_stop, substream,
 940                                      SNDRV_PCM_STATE_SETUP);
 941 }
 942
 943 /*
 944  * pause callbacks
 945  */
 946 static int snd_pcm_pre_pause(struct snd_pcm_substream *substream, int push)
 947 {
 948         struct snd_pcm_runtime *runtime = substream->runtime;
 949         if (!(runtime->info & SNDRV_PCM_INFO_PAUSE))
 950                 return -ENOSYS;
 951         if (push) {
 952                 if (runtime->status->state != SNDRV_PCM_STATE_RUNNING)
 953                         return -EBADFD;
 954         } else if (runtime->status->state != SNDRV_PCM_STATE_PAUSED)
 955                 return -EBADFD;
 956         runtime->trigger_master = substream;
 957         return 0;
 958 }
 959
 960 static int snd_pcm_do_pause(struct snd_pcm_substream *substream, int push)
 961 {
 962         if (substream->runtime->trigger_master != substream)
 963                 return 0;
 964         return substream->ops->trigger(substream,
 965                                        push ? SNDRV_PCM_TRIGGER_PAUSE_PUSH :
 966                                               SNDRV_PCM_TRIGGER_PAUSE_RELEASE);
 967 }
 968
 969 static void snd_pcm_undo_pause(struct snd_pcm_substream *substream, int push)
 970 {
 971         if (substream->runtime->trigger_master == substream)
 972                 substream->ops->trigger(substream,
 973                                         push ? SNDRV_PCM_TRIGGER_PAUSE_RELEASE :
 974                                         SNDRV_PCM_TRIGGER_PAUSE_PUSH);
 975 }
 976
 977 static void snd_pcm_post_pause(struct snd_pcm_substream *substream, int push)
 978 {
 979         struct snd_pcm_runtime *runtime = substream->runtime;
 980         snd_pcm_trigger_tstamp(substream);
 981         if (push) {
 982                 runtime->status->state = SNDRV_PCM_STATE_PAUSED;
 983                 if (substream->timer)
 984                         snd_timer_notify(substream->timer,
 985                                          SNDRV_TIMER_EVENT_MPAUSE,
 986                                          &runtime->trigger_tstamp);
 987                 wake_up(&runtime->sleep);
 988         } else {
 989                 runtime->status->state = SNDRV_PCM_STATE_RUNNING;
 990                 if (substream->timer)
 991                         snd_timer_notify(substream->timer,
 992                                          SNDRV_TIMER_EVENT_MCONTINUE,
 993                                          &runtime->trigger_tstamp);
 994         }
 995 }
 996
 997 static struct action_ops snd_pcm_action_pause = {
 998         .pre_action = snd_pcm_pre_pause,
 999         .do_action = snd_pcm_do_pause,
1000         .undo_action = snd_pcm_undo_pause,
1001         .post_action = snd_pcm_post_pause
1002 };
1003
1004 /*
1005  * Push/release the pause for all linked streams.
1006  */
1007 static int snd_pcm_pause(struct snd_pcm_substream *substream, int push)
1008 {
1009         return snd_pcm_action(&snd_pcm_action_pause, substream, push);
1010 }
1011
1012 #ifdef CONFIG_PM
1013 /* suspend */
1014
1015 static int snd_pcm_pre_suspend(struct snd_pcm_substream *substream, int state)
1016 {
1017         struct snd_pcm_runtime *runtime = substream->runtime;
1018         if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1019                 return -EBUSY;
1020         runtime->trigger_master = substream;
1021         return 0;
1022 }
1023
1024 static int snd_pcm_do_suspend(struct snd_pcm_substream *substream, int state)
1025 {
1026         struct snd_pcm_runtime *runtime = substream->runtime;
1027         if (runtime->trigger_master != substream)
1028                 return 0;
1029         if (! snd_pcm_running(substream))
1030                 return 0;
1031         substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1032         return 0; /* suspend unconditionally */
1033 }
1034
1035 static void snd_pcm_post_suspend(struct snd_pcm_substream *substream, int state)
1036 {
1037         struct snd_pcm_runtime *runtime = substream->runtime;
1038         snd_pcm_trigger_tstamp(substream);
1039         if (substream->timer)
1040                 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSUSPEND,
1041                                  &runtime->trigger_tstamp);
1042         runtime->status->suspended_state = runtime->status->state;
1043         runtime->status->state = SNDRV_PCM_STATE_SUSPENDED;
1044         wake_up(&runtime->sleep);
1045 }
1046
1047 static struct action_ops snd_pcm_action_suspend = {
1048         .pre_action = snd_pcm_pre_suspend,
1049         .do_action = snd_pcm_do_suspend,
1050         .post_action = snd_pcm_post_suspend
1051 };
1052
1053 /**
1054  * snd_pcm_suspend - trigger SUSPEND to all linked streams
1055  * @substream: the PCM substream
1056  *
1057  * After this call, all streams are changed to SUSPENDED state.
1058  */
1059 int snd_pcm_suspend(struct snd_pcm_substream *substream)
1060 {
1061         int err;
1062         unsigned long flags;
1063
1064         if (! substream)
1065                 return 0;
1066
1067         snd_pcm_stream_lock_irqsave(substream, flags);
1068         err = snd_pcm_action(&snd_pcm_action_suspend, substream, 0);
1069         snd_pcm_stream_unlock_irqrestore(substream, flags);
1070         return err;
1071 }
1072
1073 EXPORT_SYMBOL(snd_pcm_suspend);
1074
1075 /**
1076  * snd_pcm_suspend_all - trigger SUSPEND to all substreams in the given pcm
1077  * @pcm: the PCM instance
1078  *
1079  * After this call, all streams are changed to SUSPENDED state.
1080  */
1081 int snd_pcm_suspend_all(struct snd_pcm *pcm)
1082 {
1083         struct snd_pcm_substream *substream;
1084         int stream, err = 0;
1085
1086         if (! pcm)
1087                 return 0;
1088
1089         for (stream = 0; stream < 2; stream++) {
1090                 for (substream = pcm->streams[stream].substream;
1091                      substream; substream = substream->next) {
1092                         /* FIXME: the open/close code should lock this as well */
1093                         if (substream->runtime == NULL)
1094                                 continue;
1095                         err = snd_pcm_suspend(substream);
1096                         if (err < 0 && err != -EBUSY)
1097                                 return err;
1098                 }
1099         }
1100         return 0;
1101 }
1102
1103 EXPORT_SYMBOL(snd_pcm_suspend_all);
1104
1105 /* resume */
1106
1107 static int snd_pcm_pre_resume(struct snd_pcm_substream *substream, int state)
1108 {
1109         struct snd_pcm_runtime *runtime = substream->runtime;
1110         if (!(runtime->info & SNDRV_PCM_INFO_RESUME))
1111                 return -ENOSYS;
1112         runtime->trigger_master = substream;
1113         return 0;
1114 }
1115
1116 static int snd_pcm_do_resume(struct snd_pcm_substream *substream, int state)
1117 {
1118         struct snd_pcm_runtime *runtime = substream->runtime;
1119         if (runtime->trigger_master != substream)
1120                 return 0;
1121         /* DMA not running previously? */
1122         if (runtime->status->suspended_state != SNDRV_PCM_STATE_RUNNING &&
1123             (runtime->status->suspended_state != SNDRV_PCM_STATE_DRAINING ||
1124              substream->stream != SNDRV_PCM_STREAM_PLAYBACK))
1125                 return 0;
1126         return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_RESUME);
1127 }
1128
1129 static void snd_pcm_undo_resume(struct snd_pcm_substream *substream, int state)
1130 {
1131         if (substream->runtime->trigger_master == substream &&
1132             snd_pcm_running(substream))
1133                 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1134 }
1135
1136 static void snd_pcm_post_resume(struct snd_pcm_substream *substream, int state)
1137 {
1138         struct snd_pcm_runtime *runtime = substream->runtime;
1139         snd_pcm_trigger_tstamp(substream);
1140         if (substream->timer)
1141                 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MRESUME,
1142                                  &runtime->trigger_tstamp);
1143         runtime->status->state = runtime->status->suspended_state;
1144 }
1145
1146 static struct action_ops snd_pcm_action_resume = {
1147         .pre_action = snd_pcm_pre_resume,
1148         .do_action = snd_pcm_do_resume,
1149         .undo_action = snd_pcm_undo_resume,
1150         .post_action = snd_pcm_post_resume
1151 };
1152
1153 static int snd_pcm_resume(struct snd_pcm_substream *substream)
1154 {
1155         struct snd_card *card = substream->pcm->card;
1156         int res;
1157
1158         snd_power_lock(card);
1159         if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0)
1160                 res = snd_pcm_action_lock_irq(&snd_pcm_action_resume, substream, 0);
1161         snd_power_unlock(card);
1162         return res;
1163 }
1164
1165 #else
1166
1167 static int snd_pcm_resume(struct snd_pcm_substream *substream)
1168 {
1169         return -ENOSYS;
1170 }
1171
1172 #endif /* CONFIG_PM */
1173
1174 /*
1175  * xrun ioctl
1176  *
1177  * Change the RUNNING stream(s) to XRUN state.
1178  */
1179 static int snd_pcm_xrun(struct snd_pcm_substream *substream)
1180 {
1181         struct snd_card *card = substream->pcm->card;
1182         struct snd_pcm_runtime *runtime = substream->runtime;
1183         int result;
1184
1185         snd_power_lock(card);
1186         if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1187                 result = snd_power_wait(card, SNDRV_CTL_POWER_D0);
1188                 if (result < 0)
1189                         goto _unlock;
1190         }
1191
1192         snd_pcm_stream_lock_irq(substream);
1193         switch (runtime->status->state) {
1194         case SNDRV_PCM_STATE_XRUN:
1195                 result = 0;     /* already there */
1196                 break;
1197         case SNDRV_PCM_STATE_RUNNING:
1198                 result = snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
1199                 break;
1200         default:
1201                 result = -EBADFD;
1202         }
1203         snd_pcm_stream_unlock_irq(substream);
1204  _unlock:
1205         snd_power_unlock(card);
1206         return result;
1207 }
1208
1209 /*
1210  * reset ioctl
1211  */
1212 static int snd_pcm_pre_reset(struct snd_pcm_substream *substream, int state)
1213 {
1214         struct snd_pcm_runtime *runtime = substream->runtime;
1215         switch (runtime->status->state) {
1216         case SNDRV_PCM_STATE_RUNNING:
1217         case SNDRV_PCM_STATE_PREPARED:
1218         case SNDRV_PCM_STATE_PAUSED:
1219         case SNDRV_PCM_STATE_SUSPENDED:
1220                 return 0;
1221         default:
1222                 return -EBADFD;
1223         }
1224 }
1225
1226 static int snd_pcm_do_reset(struct snd_pcm_substream *substream, int state)
1227 {
1228         struct snd_pcm_runtime *runtime = substream->runtime;
1229         int err = substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_RESET, NULL);
1230         if (err < 0)
1231                 return err;
1232         runtime->hw_ptr_base = 0;
1233         runtime->hw_ptr_interrupt = runtime->status->hw_ptr -
1234                 runtime->status->hw_ptr % runtime->period_size;
1235         runtime->silence_start = runtime->status->hw_ptr;
1236         runtime->silence_filled = 0;
1237         return 0;
1238 }
1239
1240 static void snd_pcm_post_reset(struct snd_pcm_substream *substream, int state)
1241 {
1242         struct snd_pcm_runtime *runtime = substream->runtime;
1243         runtime->control->appl_ptr = runtime->status->hw_ptr;
1244         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
1245             runtime->silence_size > 0)
1246                 snd_pcm_playback_silence(substream, ULONG_MAX);
1247 }
1248
1249 static struct action_ops snd_pcm_action_reset = {
1250         .pre_action = snd_pcm_pre_reset,
1251         .do_action = snd_pcm_do_reset,
1252         .post_action = snd_pcm_post_reset
1253 };
1254
1255 static int snd_pcm_reset(struct snd_pcm_substream *substream)
1256 {
1257         return snd_pcm_action_nonatomic(&snd_pcm_action_reset, substream, 0);
1258 }
1259
1260 /*
1261  * prepare ioctl
1262  */
1263 /* we use the second argument for updating f_flags */
1264 static int snd_pcm_pre_prepare(struct snd_pcm_substream *substream,
1265                                int f_flags)
1266 {
1267         struct snd_pcm_runtime *runtime = substream->runtime;
1268         if (runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1269             runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED)
1270                 return -EBADFD;
1271         if (snd_pcm_running(substream))
1272                 return -EBUSY;
1273         substream->f_flags = f_flags;
1274         return 0;
1275 }
1276
1277 static int snd_pcm_do_prepare(struct snd_pcm_substream *substream, int state)
1278 {
1279         int err;
1280         err = substream->ops->prepare(substream);
1281         if (err < 0)
1282                 return err;
1283         return snd_pcm_do_reset(substream, 0);
1284 }
1285
1286 static void snd_pcm_post_prepare(struct snd_pcm_substream *substream, int state)
1287 {
1288         struct snd_pcm_runtime *runtime = substream->runtime;
1289         runtime->control->appl_ptr = runtime->status->hw_ptr;
1290         runtime->status->state = SNDRV_PCM_STATE_PREPARED;
1291 }
1292
1293 static struct action_ops snd_pcm_action_prepare = {
1294         .pre_action = snd_pcm_pre_prepare,
1295         .do_action = snd_pcm_do_prepare,
1296         .post_action = snd_pcm_post_prepare
1297 };
1298
1299 /**
1300  * snd_pcm_prepare - prepare the PCM substream to be triggerable
1301  * @substream: the PCM substream instance
1302  * @file: file to refer f_flags
1303  */
1304 static int snd_pcm_prepare(struct snd_pcm_substream *substream,
1305                            struct file *file)
1306 {
1307         int res;
1308         struct snd_card *card = substream->pcm->card;
1309         int f_flags;
1310
1311         if (file)
1312                 f_flags = file->f_flags;
1313         else
1314                 f_flags = substream->f_flags;
1315
1316         snd_power_lock(card);
1317         if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0)
1318                 res = snd_pcm_action_nonatomic(&snd_pcm_action_prepare,
1319                                                substream, f_flags);
1320         snd_power_unlock(card);
1321         return res;
1322 }
1323
1324 /*
1325  * drain ioctl
1326  */
1327
1328 static int snd_pcm_pre_drain_init(struct snd_pcm_substream *substream, int state)
1329 {
1330         if (substream->f_flags & O_NONBLOCK)
1331                 return -EAGAIN;
1332         substream->runtime->trigger_master = substream;
1333         return 0;
1334 }
1335
1336 static int snd_pcm_do_drain_init(struct snd_pcm_substream *substream, int state)
1337 {
1338         struct snd_pcm_runtime *runtime = substream->runtime;
1339         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
1340                 switch (runtime->status->state) {
1341                 case SNDRV_PCM_STATE_PREPARED:
1342                         /* start playback stream if possible */
1343                         if (! snd_pcm_playback_empty(substream)) {
1344                                 snd_pcm_do_start(substream, SNDRV_PCM_STATE_DRAINING);
1345                                 snd_pcm_post_start(substream, SNDRV_PCM_STATE_DRAINING);
1346                         }
1347                         break;
1348                 case SNDRV_PCM_STATE_RUNNING:
1349                         runtime->status->state = SNDRV_PCM_STATE_DRAINING;
1350                         break;
1351                 default:
1352                         break;
1353                 }
1354         } else {
1355                 /* stop running stream */
1356                 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) {
1357                         int new_state = snd_pcm_capture_avail(runtime) > 0 ?
1358                                 SNDRV_PCM_STATE_DRAINING : SNDRV_PCM_STATE_SETUP;
1359                         snd_pcm_do_stop(substream, new_state);
1360                         snd_pcm_post_stop(substream, new_state);
1361                 }
1362         }
1363         return 0;
1364 }
1365
1366 static void snd_pcm_post_drain_init(struct snd_pcm_substream *substream, int state)
1367 {
1368 }
1369
1370 static struct action_ops snd_pcm_action_drain_init = {
1371         .pre_action = snd_pcm_pre_drain_init,
1372         .do_action = snd_pcm_do_drain_init,
1373         .post_action = snd_pcm_post_drain_init
1374 };
1375
1376 struct drain_rec {
1377         struct snd_pcm_substream *substream;
1378         wait_queue_t wait;
1379         snd_pcm_uframes_t stop_threshold;
1380 };
1381
1382 static int snd_pcm_drop(struct snd_pcm_substream *substream);
1383
1384 /*
1385  * Drain the stream(s).
1386  * When the substream is linked, sync until the draining of all playback streams
1387  * is finished.
1388  * After this call, all streams are supposed to be either SETUP or DRAINING
1389  * (capture only) state.
1390  */
1391 static int snd_pcm_drain(struct snd_pcm_substream *substream)
1392 {
1393         struct snd_card *card;
1394         struct snd_pcm_runtime *runtime;
1395         struct snd_pcm_substream *s;
1396         int result = 0;
1397         int i, num_drecs;
1398         struct drain_rec *drec, drec_tmp, *d;
1399
1400         card = substream->pcm->card;
1401         runtime = substream->runtime;
1402
1403         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
1404                 return -EBADFD;
1405
1406         snd_power_lock(card);
1407         if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1408                 result = snd_power_wait(card, SNDRV_CTL_POWER_D0);
1409                 if (result < 0) {
1410                         snd_power_unlock(card);
1411                         return result;
1412                 }
1413         }
1414
1415         /* allocate temporary record for drain sync */
1416         down_read(&snd_pcm_link_rwsem);
1417         if (snd_pcm_stream_linked(substream)) {
1418                 drec = kmalloc(substream->group->count * sizeof(*drec), GFP_KERNEL);
1419                 if (! drec) {
1420                         up_read(&snd_pcm_link_rwsem);
1421                         snd_power_unlock(card);
1422                         return -ENOMEM;
1423                 }
1424         } else
1425                 drec = &drec_tmp;
1426
1427         /* count only playback streams */
1428         num_drecs = 0;
1429         snd_pcm_group_for_each_entry(s, substream) {
1430                 runtime = s->runtime;
1431                 if (s->stream == SNDRV_PCM_STREAM_PLAYBACK) {
1432                         d = &drec[num_drecs++];
1433                         d->substream = s;
1434                         init_waitqueue_entry(&d->wait, current);
1435                         add_wait_queue(&runtime->sleep, &d->wait);
1436                         /* stop_threshold fixup to avoid endless loop when
1437                          * stop_threshold > buffer_size
1438                          */
1439                         d->stop_threshold = runtime->stop_threshold;
1440                         if (runtime->stop_threshold > runtime->buffer_size)
1441                                 runtime->stop_threshold = runtime->buffer_size;
1442                 }
1443         }
1444         up_read(&snd_pcm_link_rwsem);
1445
1446         snd_pcm_stream_lock_irq(substream);
1447         /* resume pause */
1448         if (substream->runtime->status->state == SNDRV_PCM_STATE_PAUSED)
1449                 snd_pcm_pause(substream, 0);
1450
1451         /* pre-start/stop - all running streams are changed to DRAINING state */
1452         result = snd_pcm_action(&snd_pcm_action_drain_init, substream, 0);
1453         if (result < 0) {
1454                 snd_pcm_stream_unlock_irq(substream);
1455                 goto _error;
1456         }
1457
1458         for (;;) {
1459                 long tout;
1460                 if (signal_pending(current)) {
1461                         result = -ERESTARTSYS;
1462                         break;
1463                 }
1464                 /* all finished? */
1465                 for (i = 0; i < num_drecs; i++) {
1466                         runtime = drec[i].substream->runtime;
1467                         if (runtime->status->state == SNDRV_PCM_STATE_DRAINING)
1468                                 break;
1469                 }
1470                 if (i == num_drecs)
1471                         break; /* yes, all drained */
1472
1473                 set_current_state(TASK_INTERRUPTIBLE);
1474                 snd_pcm_stream_unlock_irq(substream);
1475                 snd_power_unlock(card);
1476                 tout = schedule_timeout(10 * HZ);
1477                 snd_power_lock(card);
1478                 snd_pcm_stream_lock_irq(substream);
1479                 if (tout == 0) {
1480                         if (substream->runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1481                                 result = -ESTRPIPE;
1482                         else {
1483                                 snd_printd("playback drain error (DMA or IRQ trouble?)\n");
1484                                 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1485                                 result = -EIO;
1486                         }
1487                         break;
1488                 }
1489         }
1490
1491         snd_pcm_stream_unlock_irq(substream);
1492
1493  _error:
1494         for (i = 0; i < num_drecs; i++) {
1495                 d = &drec[i];
1496                 runtime = d->substream->runtime;
1497                 remove_wait_queue(&runtime->sleep, &d->wait);
1498                 runtime->stop_threshold = d->stop_threshold;
1499         }
1500
1501         if (drec != &drec_tmp)
1502                 kfree(drec);
1503         snd_power_unlock(card);
1504
1505         return result;
1506 }
1507
1508 /*
1509  * drop ioctl
1510  *
1511  * Immediately put all linked substreams into SETUP state.
1512  */
1513 static int snd_pcm_drop(struct snd_pcm_substream *substream)
1514 {
1515         struct snd_pcm_runtime *runtime;
1516         struct snd_card *card;
1517         int result = 0;
1518
1519         if (PCM_RUNTIME_CHECK(substream))
1520                 return -ENXIO;
1521         runtime = substream->runtime;
1522         card = substream->pcm->card;
1523
1524         if (runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1525             runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED ||
1526             runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1527                 return -EBADFD;
1528
1529         snd_pcm_stream_lock_irq(substream);
1530         /* resume pause */
1531         if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
1532                 snd_pcm_pause(substream, 0);
1533
1534         snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1535         /* runtime->control->appl_ptr = runtime->status->hw_ptr; */
1536         snd_pcm_stream_unlock_irq(substream);
1537
1538         return result;
1539 }
1540
1541
1542 /* WARNING: Don't forget to fput back the file */
1543 static struct file *snd_pcm_file_fd(int fd)
1544 {
1545         struct file *file;
1546         struct inode *inode;
1547         unsigned int minor;
1548
1549         file = fget(fd);
1550         if (!file)
1551                 return NULL;
1552         inode = file->f_path.dentry->d_inode;
1553         if (!S_ISCHR(inode->i_mode) ||
1554             imajor(inode) != snd_major) {
1555                 fput(file);
1556                 return NULL;
1557         }
1558         minor = iminor(inode);
1559         if (!snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_PLAYBACK) &&
1560             !snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_CAPTURE)) {
1561                 fput(file);
1562                 return NULL;
1563         }
1564         return file;
1565 }
1566
1567 /*
1568  * PCM link handling
1569  */
1570 static int snd_pcm_link(struct snd_pcm_substream *substream, int fd)
1571 {
1572         int res = 0;
1573         struct file *file;
1574         struct snd_pcm_file *pcm_file;
1575         struct snd_pcm_substream *substream1;
1576
1577         file = snd_pcm_file_fd(fd);
1578         if (!file)
1579                 return -EBADFD;
1580         pcm_file = file->private_data;
1581         substream1 = pcm_file->substream;
1582         down_write(&snd_pcm_link_rwsem);
1583         write_lock_irq(&snd_pcm_link_rwlock);
1584         if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1585             substream->runtime->status->state != substream1->runtime->status->state) {
1586                 res = -EBADFD;
1587                 goto _end;
1588         }
1589         if (snd_pcm_stream_linked(substream1)) {
1590                 res = -EALREADY;
1591                 goto _end;
1592         }
1593         if (!snd_pcm_stream_linked(substream)) {
1594                 substream->group = kmalloc(sizeof(struct snd_pcm_group), GFP_ATOMIC);
1595                 if (substream->group == NULL) {
1596                         res = -ENOMEM;
1597                         goto _end;
1598                 }
1599                 spin_lock_init(&substream->group->lock);
1600                 INIT_LIST_HEAD(&substream->group->substreams);
1601                 list_add_tail(&substream->link_list, &substream->group->substreams);
1602                 substream->group->count = 1;
1603         }
1604         list_add_tail(&substream1->link_list, &substream->group->substreams);
1605         substream->group->count++;
1606         substream1->group = substream->group;
1607  _end:
1608         write_unlock_irq(&snd_pcm_link_rwlock);
1609         up_write(&snd_pcm_link_rwsem);
1610         fput(file);
1611         return res;
1612 }
1613
1614 static void relink_to_local(struct snd_pcm_substream *substream)
1615 {
1616         substream->group = &substream->self_group;
1617         INIT_LIST_HEAD(&substream->self_group.substreams);
1618         list_add_tail(&substream->link_list, &substream->self_group.substreams);
1619 }
1620
1621 static int snd_pcm_unlink(struct snd_pcm_substream *substream)
1622 {
1623         struct snd_pcm_substream *s;
1624         int res = 0;
1625
1626         down_write(&snd_pcm_link_rwsem);
1627         write_lock_irq(&snd_pcm_link_rwlock);
1628         if (!snd_pcm_stream_linked(substream)) {
1629                 res = -EALREADY;
1630                 goto _end;
1631         }
1632         list_del(&substream->link_list);
1633         substream->group->count--;
1634         if (substream->group->count == 1) {     /* detach the last stream, too */
1635                 snd_pcm_group_for_each_entry(s, substream) {
1636                         relink_to_local(s);
1637                         break;
1638                 }
1639                 kfree(substream->group);
1640         }
1641         relink_to_local(substream);
1642        _end:
1643         write_unlock_irq(&snd_pcm_link_rwlock);
1644         up_write(&snd_pcm_link_rwsem);
1645         return res;
1646 }
1647
1648 /*
1649  * hw configurator
1650  */
1651 static int snd_pcm_hw_rule_mul(struct snd_pcm_hw_params *params,
1652                                struct snd_pcm_hw_rule *rule)
1653 {
1654         struct snd_interval t;
1655         snd_interval_mul(hw_param_interval_c(params, rule->deps[0]),
1656                      hw_param_interval_c(params, rule->deps[1]), &t);
1657         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1658 }
1659
1660 static int snd_pcm_hw_rule_div(struct snd_pcm_hw_params *params,
1661                                struct snd_pcm_hw_rule *rule)
1662 {
1663         struct snd_interval t;
1664         snd_interval_div(hw_param_interval_c(params, rule->deps[0]),
1665                      hw_param_interval_c(params, rule->deps[1]), &t);
1666         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1667 }
1668
1669 static int snd_pcm_hw_rule_muldivk(struct snd_pcm_hw_params *params,
1670                                    struct snd_pcm_hw_rule *rule)
1671 {
1672         struct snd_interval t;
1673         snd_interval_muldivk(hw_param_interval_c(params, rule->deps[0]),
1674                          hw_param_interval_c(params, rule->deps[1]),
1675                          (unsigned long) rule->private, &t);
1676         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1677 }
1678
1679 static int snd_pcm_hw_rule_mulkdiv(struct snd_pcm_hw_params *params,
1680                                    struct snd_pcm_hw_rule *rule)
1681 {
1682         struct snd_interval t;
1683         snd_interval_mulkdiv(hw_param_interval_c(params, rule->deps[0]),
1684                          (unsigned long) rule->private,
1685                          hw_param_interval_c(params, rule->deps[1]), &t);
1686         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1687 }
1688
1689 static int snd_pcm_hw_rule_format(struct snd_pcm_hw_params *params,
1690                                   struct snd_pcm_hw_rule *rule)
1691 {
1692         unsigned int k;
1693         struct snd_interval *i = hw_param_interval(params, rule->deps[0]);
1694         struct snd_mask m;
1695         struct snd_mask *mask = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1696         snd_mask_any(&m);
1697         for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
1698                 int bits;
1699                 if (! snd_mask_test(mask, k))
1700                         continue;
1701                 bits = snd_pcm_format_physical_width(k);
1702                 if (bits <= 0)
1703                         continue; /* ignore invalid formats */
1704                 if ((unsigned)bits < i->min || (unsigned)bits > i->max)
1705                         snd_mask_reset(&m, k);
1706         }
1707         return snd_mask_refine(mask, &m);
1708 }
1709
1710 static int snd_pcm_hw_rule_sample_bits(struct snd_pcm_hw_params *params,
1711                                        struct snd_pcm_hw_rule *rule)
1712 {
1713         struct snd_interval t;
1714         unsigned int k;
1715         t.min = UINT_MAX;
1716         t.max = 0;
1717         t.openmin = 0;
1718         t.openmax = 0;
1719         for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
1720                 int bits;
1721                 if (! snd_mask_test(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT), k))
1722                         continue;
1723                 bits = snd_pcm_format_physical_width(k);
1724                 if (bits <= 0)
1725                         continue; /* ignore invalid formats */
1726                 if (t.min > (unsigned)bits)
1727                         t.min = bits;
1728                 if (t.max < (unsigned)bits)
1729                         t.max = bits;
1730         }
1731         t.integer = 1;
1732         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1733 }
1734
1735 #if SNDRV_PCM_RATE_5512 != 1 << 0 || SNDRV_PCM_RATE_192000 != 1 << 12
1736 #error "Change this table"
1737 #endif
1738
1739 static unsigned int rates[] = { 5512, 8000, 11025, 16000, 22050, 32000, 44100,
1740                                  48000, 64000, 88200, 96000, 176400, 192000 };
1741
1742 const struct snd_pcm_hw_constraint_list snd_pcm_known_rates = {
1743         .count = ARRAY_SIZE(rates),
1744         .list = rates,
1745 };
1746
1747 static int snd_pcm_hw_rule_rate(struct snd_pcm_hw_params *params,
1748                                 struct snd_pcm_hw_rule *rule)
1749 {
1750         struct snd_pcm_hardware *hw = rule->private;
1751         return snd_interval_list(hw_param_interval(params, rule->var),
1752                                  snd_pcm_known_rates.count,
1753                                  snd_pcm_known_rates.list, hw->rates);
1754 }
1755
1756 static int snd_pcm_hw_rule_buffer_bytes_max(struct snd_pcm_hw_params *params,
1757                                             struct snd_pcm_hw_rule *rule)
1758 {
1759         struct snd_interval t;
1760         struct snd_pcm_substream *substream = rule->private;
1761         t.min = 0;
1762         t.max = substream->buffer_bytes_max;
1763         t.openmin = 0;
1764         t.openmax = 0;
1765         t.integer = 1;
1766         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1767 }
1768
1769 int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream)
1770 {
1771         struct snd_pcm_runtime *runtime = substream->runtime;
1772         struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints;
1773         int k, err;
1774
1775         for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
1776                 snd_mask_any(constrs_mask(constrs, k));
1777         }
1778
1779         for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
1780                 snd_interval_any(constrs_interval(constrs, k));
1781         }
1782
1783         snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_CHANNELS));
1784         snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_SIZE));
1785         snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_BYTES));
1786         snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_SAMPLE_BITS));
1787         snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_FRAME_BITS));
1788
1789         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT,
1790                                    snd_pcm_hw_rule_format, NULL,
1791                                    SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1792         if (err < 0)
1793                 return err;
1794         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
1795                                   snd_pcm_hw_rule_sample_bits, NULL,
1796                                   SNDRV_PCM_HW_PARAM_FORMAT,
1797                                   SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1798         if (err < 0)
1799                 return err;
1800         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
1801                                   snd_pcm_hw_rule_div, NULL,
1802                                   SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
1803         if (err < 0)
1804                 return err;
1805         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1806                                   snd_pcm_hw_rule_mul, NULL,
1807                                   SNDRV_PCM_HW_PARAM_SAMPLE_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
1808         if (err < 0)
1809                 return err;
1810         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1811                                   snd_pcm_hw_rule_mulkdiv, (void*) 8,
1812                                   SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
1813         if (err < 0)
1814                 return err;
1815         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1816                                   snd_pcm_hw_rule_mulkdiv, (void*) 8,
1817                                   SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, -1);
1818         if (err < 0)
1819                 return err;
1820         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
1821                                   snd_pcm_hw_rule_div, NULL,
1822                                   SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1823         if (err < 0)
1824                 return err;
1825         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1826                                   snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1827                                   SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_TIME, -1);
1828         if (err < 0)
1829                 return err;
1830         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1831                                   snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1832                                   SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_BUFFER_TIME, -1);
1833         if (err < 0)
1834                 return err;
1835         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIODS,
1836                                   snd_pcm_hw_rule_div, NULL,
1837                                   SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
1838         if (err < 0)
1839                 return err;
1840         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
1841                                   snd_pcm_hw_rule_div, NULL,
1842                                   SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
1843         if (err < 0)
1844                 return err;
1845         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
1846                                   snd_pcm_hw_rule_mulkdiv, (void*) 8,
1847                                   SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1848         if (err < 0)
1849                 return err;
1850         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
1851                                   snd_pcm_hw_rule_muldivk, (void*) 1000000,
1852                                   SNDRV_PCM_HW_PARAM_PERIOD_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
1853         if (err < 0)
1854                 return err;
1855         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
1856                                   snd_pcm_hw_rule_mul, NULL,
1857                                   SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
1858         if (err < 0)
1859                 return err;
1860         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
1861                                   snd_pcm_hw_rule_mulkdiv, (void*) 8,
1862                                   SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1863         if (err < 0)
1864                 return err;
1865         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
1866                                   snd_pcm_hw_rule_muldivk, (void*) 1000000,
1867                                   SNDRV_PCM_HW_PARAM_BUFFER_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
1868         if (err < 0)
1869                 return err;
1870         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
1871                                   snd_pcm_hw_rule_muldivk, (void*) 8,
1872                                   SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1873         if (err < 0)
1874                 return err;
1875         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
1876                                   snd_pcm_hw_rule_muldivk, (void*) 8,
1877                                   SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1878         if (err < 0)
1879                 return err;
1880         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_TIME,
1881                                   snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1882                                   SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
1883         if (err < 0)
1884                 return err;
1885         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_TIME,
1886                                   snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1887                                   SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
1888         if (err < 0)
1889                 return err;
1890         return 0;
1891 }
1892
1893 int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream)
1894 {
1895         struct snd_pcm_runtime *runtime = substream->runtime;
1896         struct snd_pcm_hardware *hw = &runtime->hw;
1897         int err;
1898         unsigned int mask = 0;
1899
1900         if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
1901                 mask |= 1 << SNDRV_PCM_ACCESS_RW_INTERLEAVED;
1902         if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
1903                 mask |= 1 << SNDRV_PCM_ACCESS_RW_NONINTERLEAVED;
1904         if (hw->info & SNDRV_PCM_INFO_MMAP) {
1905                 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
1906                         mask |= 1 << SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
1907                 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
1908                         mask |= 1 << SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED;
1909                 if (hw->info & SNDRV_PCM_INFO_COMPLEX)
1910                         mask |= 1 << SNDRV_PCM_ACCESS_MMAP_COMPLEX;
1911         }
1912         err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_ACCESS, mask);
1913         if (err < 0)
1914                 return err;
1915
1916         err = snd_pcm_hw_constraint_mask64(runtime, SNDRV_PCM_HW_PARAM_FORMAT, hw->formats);
1917         if (err < 0)
1918                 return err;
1919
1920         err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_SUBFORMAT, 1 << SNDRV_PCM_SUBFORMAT_STD);
1921         if (err < 0)
1922                 return err;
1923
1924         err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_CHANNELS,
1925                                            hw->channels_min, hw->channels_max);
1926         if (err < 0)
1927                 return err;
1928
1929         err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_RATE,
1930                                            hw->rate_min, hw->rate_max);
1931          if (err < 0)
1932                  return err;
1933
1934         err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
1935                                            hw->period_bytes_min, hw->period_bytes_max);
1936          if (err < 0)
1937                  return err;
1938
1939         err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIODS,
1940                                            hw->periods_min, hw->periods_max);
1941         if (err < 0)
1942                 return err;
1943
1944         err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
1945                                            hw->period_bytes_min, hw->buffer_bytes_max);
1946         if (err < 0)
1947                 return err;
1948
1949         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
1950                                   snd_pcm_hw_rule_buffer_bytes_max, substream,
1951                                   SNDRV_PCM_HW_PARAM_BUFFER_BYTES, -1);
1952         if (err < 0)
1953                 return err;
1954
1955         /* FIXME: remove */
1956         if (runtime->dma_bytes) {
1957                 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 0, runtime->dma_bytes);
1958                 if (err < 0)
1959                         return -EINVAL;
1960         }
1961
1962         if (!(hw->rates & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))) {
1963                 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1964                                           snd_pcm_hw_rule_rate, hw,
1965                                           SNDRV_PCM_HW_PARAM_RATE, -1);
1966                 if (err < 0)
1967                         return err;
1968         }
1969
1970         /* FIXME: this belong to lowlevel */
1971         snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIOD_SIZE);
1972
1973         return 0;
1974 }
1975
1976 static void pcm_release_private(struct snd_pcm_substream *substream)
1977 {
1978         snd_pcm_unlink(substream);
1979 }
1980
1981 void snd_pcm_release_substream(struct snd_pcm_substream *substream)
1982 {
1983         substream->ref_count--;
1984         if (substream->ref_count > 0)
1985                 return;
1986
1987         snd_pcm_drop(substream);
1988         if (substream->hw_opened) {
1989                 if (substream->ops->hw_free != NULL)
1990                         substream->ops->hw_free(substream);
1991                 substream->ops->close(substream);
1992                 substream->hw_opened = 0;
1993         }
1994         if (substream->pcm_release) {
1995                 substream->pcm_release(substream);
1996                 substream->pcm_release = NULL;
1997         }
1998         snd_pcm_detach_substream(substream);
1999 }
2000
2001 EXPORT_SYMBOL(snd_pcm_release_substream);
2002
2003 int snd_pcm_open_substream(struct snd_pcm *pcm, int stream,
2004                            struct file *file,
2005                            struct snd_pcm_substream **rsubstream)
2006 {
2007         struct snd_pcm_substream *substream;
2008         int err;
2009
2010         err = snd_pcm_attach_substream(pcm, stream, file, &substream);
2011         if (err < 0)
2012                 return err;
2013         if (substream->ref_count > 1) {
2014                 *rsubstream = substream;
2015                 return 0;
2016         }
2017
2018         err = snd_pcm_hw_constraints_init(substream);
2019         if (err < 0) {
2020                 snd_printd("snd_pcm_hw_constraints_init failed\n");
2021                 goto error;
2022         }
2023
2024         if ((err = substream->ops->open(substream)) < 0)
2025                 goto error;
2026
2027         substream->hw_opened = 1;
2028
2029         err = snd_pcm_hw_constraints_complete(substream);
2030         if (err < 0) {
2031                 snd_printd("snd_pcm_hw_constraints_complete failed\n");
2032                 goto error;
2033         }
2034
2035         *rsubstream = substream;
2036         return 0;
2037
2038  error:
2039         snd_pcm_release_substream(substream);
2040         return err;
2041 }
2042
2043 EXPORT_SYMBOL(snd_pcm_open_substream);
2044
2045 static int snd_pcm_open_file(struct file *file,
2046                              struct snd_pcm *pcm,
2047                              int stream,
2048                              struct snd_pcm_file **rpcm_file)
2049 {
2050         struct snd_pcm_file *pcm_file;
2051         struct snd_pcm_substream *substream;
2052         struct snd_pcm_str *str;
2053         int err;
2054
2055         if (rpcm_file)
2056                 *rpcm_file = NULL;
2057
2058         err = snd_pcm_open_substream(pcm, stream, file, &substream);
2059         if (err < 0)
2060                 return err;
2061
2062         pcm_file = kzalloc(sizeof(*pcm_file), GFP_KERNEL);
2063         if (pcm_file == NULL) {
2064                 snd_pcm_release_substream(substream);
2065                 return -ENOMEM;
2066         }
2067         pcm_file->substream = substream;
2068         if (substream->ref_count == 1) {
2069                 str = substream->pstr;
2070                 substream->file = pcm_file;
2071                 substream->pcm_release = pcm_release_private;
2072         }
2073         file->private_data = pcm_file;
2074         if (rpcm_file)
2075                 *rpcm_file = pcm_file;
2076         return 0;
2077 }
2078
2079 static int snd_pcm_playback_open(struct inode *inode, struct file *file)
2080 {
2081         struct snd_pcm *pcm;
2082
2083         pcm = snd_lookup_minor_data(iminor(inode),
2084                                     SNDRV_DEVICE_TYPE_PCM_PLAYBACK);
2085         return snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_PLAYBACK);
2086 }
2087
2088 static int snd_pcm_capture_open(struct inode *inode, struct file *file)
2089 {
2090         struct snd_pcm *pcm;
2091
2092         pcm = snd_lookup_minor_data(iminor(inode),
2093                                     SNDRV_DEVICE_TYPE_PCM_CAPTURE);
2094         return snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_CAPTURE);
2095 }
2096
2097 static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream)
2098 {
2099         int err;
2100         struct snd_pcm_file *pcm_file;
2101         wait_queue_t wait;
2102
2103         if (pcm == NULL) {
2104                 err = -ENODEV;
2105                 goto __error1;
2106         }
2107         err = snd_card_file_add(pcm->card, file);
2108         if (err < 0)
2109                 goto __error1;
2110         if (!try_module_get(pcm->card->module)) {
2111                 err = -EFAULT;
2112                 goto __error2;
2113         }
2114         init_waitqueue_entry(&wait, current);
2115         add_wait_queue(&pcm->open_wait, &wait);
2116         mutex_lock(&pcm->open_mutex);
2117         while (1) {
2118                 err = snd_pcm_open_file(file, pcm, stream, &pcm_file);
2119                 if (err >= 0)
2120                         break;
2121                 if (err == -EAGAIN) {
2122                         if (file->f_flags & O_NONBLOCK) {
2123                                 err = -EBUSY;
2124                                 break;
2125                         }
2126                 } else
2127                         break;
2128                 set_current_state(TASK_INTERRUPTIBLE);
2129                 mutex_unlock(&pcm->open_mutex);
2130                 schedule();
2131                 mutex_lock(&pcm->open_mutex);
2132                 if (signal_pending(current)) {
2133                         err = -ERESTARTSYS;
2134                         break;
2135                 }
2136         }
2137         remove_wait_queue(&pcm->open_wait, &wait);
2138         mutex_unlock(&pcm->open_mutex);
2139         if (err < 0)
2140                 goto __error;
2141         return err;
2142
2143       __error:
2144         module_put(pcm->card->module);
2145       __error2:
2146         snd_card_file_remove(pcm->card, file);
2147       __error1:
2148         return err;
2149 }
2150
2151 static int snd_pcm_release(struct inode *inode, struct file *file)
2152 {
2153         struct snd_pcm *pcm;
2154         struct snd_pcm_substream *substream;
2155         struct snd_pcm_file *pcm_file;
2156
2157         pcm_file = file->private_data;
2158         substream = pcm_file->substream;
2159         if (snd_BUG_ON(!substream))
2160                 return -ENXIO;
2161         pcm = substream->pcm;
2162         mutex_lock(&pcm->open_mutex);
2163         snd_pcm_release_substream(substream);
2164         kfree(pcm_file);
2165         mutex_unlock(&pcm->open_mutex);
2166         wake_up(&pcm->open_wait);
2167         module_put(pcm->card->module);
2168         snd_card_file_remove(pcm->card, file);
2169         return 0;
2170 }
2171
2172 static snd_pcm_sframes_t snd_pcm_playback_rewind(struct snd_pcm_substream *substream,
2173                                                  snd_pcm_uframes_t frames)
2174 {
2175         struct snd_pcm_runtime *runtime = substream->runtime;
2176         snd_pcm_sframes_t appl_ptr;
2177         snd_pcm_sframes_t ret;
2178         snd_pcm_sframes_t hw_avail;
2179
2180         if (frames == 0)
2181                 return 0;
2182
2183         snd_pcm_stream_lock_irq(substream);
2184         switch (runtime->status->state) {
2185         case SNDRV_PCM_STATE_PREPARED:
2186                 break;
2187         case SNDRV_PCM_STATE_DRAINING:
2188         case SNDRV_PCM_STATE_RUNNING:
2189                 if (snd_pcm_update_hw_ptr(substream) >= 0)
2190                         break;
2191                 /* Fall through */
2192         case SNDRV_PCM_STATE_XRUN:
2193                 ret = -EPIPE;
2194                 goto __end;
2195         default:
2196                 ret = -EBADFD;
2197                 goto __end;
2198         }
2199
2200         hw_avail = snd_pcm_playback_hw_avail(runtime);
2201         if (hw_avail <= 0) {
2202                 ret = 0;
2203                 goto __end;
2204         }
2205         if (frames > (snd_pcm_uframes_t)hw_avail)
2206                 frames = hw_avail;
2207         appl_ptr = runtime->control->appl_ptr - frames;
2208         if (appl_ptr < 0)
2209                 appl_ptr += runtime->boundary;
2210         runtime->control->appl_ptr = appl_ptr;
2211         ret = frames;
2212  __end:
2213         snd_pcm_stream_unlock_irq(substream);
2214         return ret;
2215 }
2216
2217 static snd_pcm_sframes_t snd_pcm_capture_rewind(struct snd_pcm_substream *substream,
2218                                                 snd_pcm_uframes_t frames)
2219 {
2220         struct snd_pcm_runtime *runtime = substream->runtime;
2221         snd_pcm_sframes_t appl_ptr;
2222         snd_pcm_sframes_t ret;
2223         snd_pcm_sframes_t hw_avail;
2224
2225         if (frames == 0)
2226                 return 0;
2227
2228         snd_pcm_stream_lock_irq(substream);
2229         switch (runtime->status->state) {
2230         case SNDRV_PCM_STATE_PREPARED:
2231         case SNDRV_PCM_STATE_DRAINING:
2232                 break;
2233         case SNDRV_PCM_STATE_RUNNING:
2234                 if (snd_pcm_update_hw_ptr(substream) >= 0)
2235                         break;
2236                 /* Fall through */
2237         case SNDRV_PCM_STATE_XRUN:
2238                 ret = -EPIPE;
2239                 goto __end;
2240         default:
2241                 ret = -EBADFD;
2242                 goto __end;
2243         }
2244
2245         hw_avail = snd_pcm_capture_hw_avail(runtime);
2246         if (hw_avail <= 0) {
2247                 ret = 0;
2248                 goto __end;
2249         }
2250         if (frames > (snd_pcm_uframes_t)hw_avail)
2251                 frames = hw_avail;
2252         appl_ptr = runtime->control->appl_ptr - frames;
2253         if (appl_ptr < 0)
2254                 appl_ptr += runtime->boundary;
2255         runtime->control->appl_ptr = appl_ptr;
2256         ret = frames;
2257  __end:
2258         snd_pcm_stream_unlock_irq(substream);
2259         return ret;
2260 }
2261
2262 static snd_pcm_sframes_t snd_pcm_playback_forward(struct snd_pcm_substream *substream,
2263                                                   snd_pcm_uframes_t frames)
2264 {
2265         struct snd_pcm_runtime *runtime = substream->runtime;
2266         snd_pcm_sframes_t appl_ptr;
2267         snd_pcm_sframes_t ret;
2268         snd_pcm_sframes_t avail;
2269
2270         if (frames == 0)
2271                 return 0;
2272
2273         snd_pcm_stream_lock_irq(substream);
2274         switch (runtime->status->state) {
2275         case SNDRV_PCM_STATE_PREPARED:
2276         case SNDRV_PCM_STATE_PAUSED:
2277                 break;
2278         case SNDRV_PCM_STATE_DRAINING:
2279         case SNDRV_PCM_STATE_RUNNING:
2280                 if (snd_pcm_update_hw_ptr(substream) >= 0)
2281                         break;
2282                 /* Fall through */
2283         case SNDRV_PCM_STATE_XRUN:
2284                 ret = -EPIPE;
2285                 goto __end;
2286         default:
2287                 ret = -EBADFD;
2288                 goto __end;
2289         }
2290
2291         avail = snd_pcm_playback_avail(runtime);
2292         if (avail <= 0) {
2293                 ret = 0;
2294                 goto __end;
2295         }
2296         if (frames > (snd_pcm_uframes_t)avail)
2297                 frames = avail;
2298         appl_ptr = runtime->control->appl_ptr + frames;
2299         if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary)
2300                 appl_ptr -= runtime->boundary;
2301         runtime->control->appl_ptr = appl_ptr;
2302         ret = frames;
2303  __end:
2304         snd_pcm_stream_unlock_irq(substream);
2305         return ret;
2306 }
2307
2308 static snd_pcm_sframes_t snd_pcm_capture_forward(struct snd_pcm_substream *substream,
2309                                                  snd_pcm_uframes_t frames)
2310 {
2311         struct snd_pcm_runtime *runtime = substream->runtime;
2312         snd_pcm_sframes_t appl_ptr;
2313         snd_pcm_sframes_t ret;
2314         snd_pcm_sframes_t avail;
2315
2316         if (frames == 0)
2317                 return 0;
2318
2319         snd_pcm_stream_lock_irq(substream);
2320         switch (runtime->status->state) {
2321         case SNDRV_PCM_STATE_PREPARED:
2322         case SNDRV_PCM_STATE_DRAINING:
2323         case SNDRV_PCM_STATE_PAUSED:
2324                 break;
2325         case SNDRV_PCM_STATE_RUNNING:
2326                 if (snd_pcm_update_hw_ptr(substream) >= 0)
2327                         break;
2328                 /* Fall through */
2329         case SNDRV_PCM_STATE_XRUN:
2330                 ret = -EPIPE;
2331                 goto __end;
2332         default:
2333                 ret = -EBADFD;
2334                 goto __end;
2335         }
2336
2337         avail = snd_pcm_capture_avail(runtime);
2338         if (avail <= 0) {
2339                 ret = 0;
2340                 goto __end;
2341         }
2342         if (frames > (snd_pcm_uframes_t)avail)
2343                 frames = avail;
2344         appl_ptr = runtime->control->appl_ptr + frames;
2345         if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary)
2346                 appl_ptr -= runtime->boundary;
2347         runtime->control->appl_ptr = appl_ptr;
2348         ret = frames;
2349  __end:
2350         snd_pcm_stream_unlock_irq(substream);
2351         return ret;
2352 }
2353
2354 static int snd_pcm_hwsync(struct snd_pcm_substream *substream)
2355 {
2356         struct snd_pcm_runtime *runtime = substream->runtime;
2357         int err;
2358
2359         snd_pcm_stream_lock_irq(substream);
2360         switch (runtime->status->state) {
2361         case SNDRV_PCM_STATE_DRAINING:
2362                 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
2363                         goto __badfd;
2364         case SNDRV_PCM_STATE_RUNNING:
2365                 if ((err = snd_pcm_update_hw_ptr(substream)) < 0)
2366                         break;
2367                 /* Fall through */
2368         case SNDRV_PCM_STATE_PREPARED:
2369         case SNDRV_PCM_STATE_SUSPENDED:
2370                 err = 0;
2371                 break;
2372         case SNDRV_PCM_STATE_XRUN:
2373                 err = -EPIPE;
2374                 break;
2375         default:
2376               __badfd:
2377                 err = -EBADFD;
2378                 break;
2379         }
2380         snd_pcm_stream_unlock_irq(substream);
2381         return err;
2382 }
2383
2384 static int snd_pcm_delay(struct snd_pcm_substream *substream,
2385                          snd_pcm_sframes_t __user *res)
2386 {
2387         struct snd_pcm_runtime *runtime = substream->runtime;
2388         int err;
2389         snd_pcm_sframes_t n = 0;
2390
2391         snd_pcm_stream_lock_irq(substream);
2392         switch (runtime->status->state) {
2393         case SNDRV_PCM_STATE_DRAINING:
2394                 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
2395                         goto __badfd;
2396         case SNDRV_PCM_STATE_RUNNING:
2397                 if ((err = snd_pcm_update_hw_ptr(substream)) < 0)
2398                         break;
2399                 /* Fall through */
2400         case SNDRV_PCM_STATE_PREPARED:
2401         case SNDRV_PCM_STATE_SUSPENDED:
2402                 err = 0;
2403                 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
2404                         n = snd_pcm_playback_hw_avail(runtime);
2405                 else
2406                         n = snd_pcm_capture_avail(runtime);
2407                 break;
2408         case SNDRV_PCM_STATE_XRUN:
2409                 err = -EPIPE;
2410                 break;
2411         default:
2412               __badfd:
2413                 err = -EBADFD;
2414                 break;
2415         }
2416         snd_pcm_stream_unlock_irq(substream);
2417         if (!err)
2418                 if (put_user(n, res))
2419                         err = -EFAULT;
2420         return err;
2421 }
2422
2423 static int snd_pcm_sync_ptr(struct snd_pcm_substream *substream,
2424                             struct snd_pcm_sync_ptr __user *_sync_ptr)
2425 {
2426         struct snd_pcm_runtime *runtime = substream->runtime;
2427         struct snd_pcm_sync_ptr sync_ptr;
2428         volatile struct snd_pcm_mmap_status *status;
2429         volatile struct snd_pcm_mmap_control *control;
2430         int err;
2431
2432         memset(&sync_ptr, 0, sizeof(sync_ptr));
2433         if (get_user(sync_ptr.flags, (unsigned __user *)&(_sync_ptr->flags)))
2434                 return -EFAULT;
2435         if (copy_from_user(&sync_ptr.c.control, &(_sync_ptr->c.control), sizeof(struct snd_pcm_mmap_control)))
2436                 return -EFAULT;
2437         status = runtime->status;
2438         control = runtime->control;
2439         if (sync_ptr.flags & SNDRV_PCM_SYNC_PTR_HWSYNC) {
2440                 err = snd_pcm_hwsync(substream);
2441                 if (err < 0)
2442                         return err;
2443         }
2444         snd_pcm_stream_lock_irq(substream);
2445         if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_APPL))
2446                 control->appl_ptr = sync_ptr.c.control.appl_ptr;
2447         else
2448                 sync_ptr.c.control.appl_ptr = control->appl_ptr;
2449         if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN))
2450                 control->avail_min = sync_ptr.c.control.avail_min;
2451         else
2452                 sync_ptr.c.control.avail_min = control->avail_min;
2453         sync_ptr.s.status.state = status->state;
2454         sync_ptr.s.status.hw_ptr = status->hw_ptr;
2455         sync_ptr.s.status.tstamp = status->tstamp;
2456         sync_ptr.s.status.suspended_state = status->suspended_state;
2457         snd_pcm_stream_unlock_irq(substream);
2458         if (copy_to_user(_sync_ptr, &sync_ptr, sizeof(sync_ptr)))
2459                 return -EFAULT;
2460         return 0;
2461 }
2462
2463 static int snd_pcm_tstamp(struct snd_pcm_substream *substream, int __user *_arg)
2464 {
2465         struct snd_pcm_runtime *runtime = substream->runtime;
2466         int arg;
2467
2468         if (get_user(arg, _arg))
2469                 return -EFAULT;
2470         if (arg < 0 || arg > SNDRV_PCM_TSTAMP_TYPE_LAST)
2471                 return -EINVAL;
2472         runtime->tstamp_type = SNDRV_PCM_TSTAMP_TYPE_GETTIMEOFDAY;
2473         if (arg == SNDRV_PCM_TSTAMP_TYPE_MONOTONIC)
2474                 runtime->tstamp_type = SNDRV_PCM_TSTAMP_TYPE_MONOTONIC;
2475         return 0;
2476 }
2477
2478 static int snd_pcm_common_ioctl1(struct file *file,
2479                                  struct snd_pcm_substream *substream,
2480                                  unsigned int cmd, void __user *arg)
2481 {
2482         switch (cmd) {
2483         case SNDRV_PCM_IOCTL_PVERSION:
2484                 return put_user(SNDRV_PCM_VERSION, (int __user *)arg) ? -EFAULT : 0;
2485         case SNDRV_PCM_IOCTL_INFO:
2486                 return snd_pcm_info_user(substream, arg);
2487         case SNDRV_PCM_IOCTL_TSTAMP:    /* just for compatibility */
2488                 return 0;
2489         case SNDRV_PCM_IOCTL_TTSTAMP:
2490                 return snd_pcm_tstamp(substream, arg);
2491         case SNDRV_PCM_IOCTL_HW_REFINE:
2492                 return snd_pcm_hw_refine_user(substream, arg);
2493         case SNDRV_PCM_IOCTL_HW_PARAMS:
2494                 return snd_pcm_hw_params_user(substream, arg);
2495         case SNDRV_PCM_IOCTL_HW_FREE:
2496                 return snd_pcm_hw_free(substream);
2497         case SNDRV_PCM_IOCTL_SW_PARAMS:
2498                 return snd_pcm_sw_params_user(substream, arg);
2499         case SNDRV_PCM_IOCTL_STATUS:
2500                 return snd_pcm_status_user(substream, arg);
2501         case SNDRV_PCM_IOCTL_CHANNEL_INFO:
2502                 return snd_pcm_channel_info_user(substream, arg);
2503         case SNDRV_PCM_IOCTL_PREPARE:
2504                 return snd_pcm_prepare(substream, file);
2505         case SNDRV_PCM_IOCTL_RESET:
2506                 return snd_pcm_reset(substream);
2507         case SNDRV_PCM_IOCTL_START:
2508                 return snd_pcm_action_lock_irq(&snd_pcm_action_start, substream, SNDRV_PCM_STATE_RUNNING);
2509         case SNDRV_PCM_IOCTL_LINK:
2510                 return snd_pcm_link(substream, (int)(unsigned long) arg);
2511         case SNDRV_PCM_IOCTL_UNLINK:
2512                 return snd_pcm_unlink(substream);
2513         case SNDRV_PCM_IOCTL_RESUME:
2514                 return snd_pcm_resume(substream);
2515         case SNDRV_PCM_IOCTL_XRUN:
2516                 return snd_pcm_xrun(substream);
2517         case SNDRV_PCM_IOCTL_HWSYNC:
2518                 return snd_pcm_hwsync(substream);
2519         case SNDRV_PCM_IOCTL_DELAY:
2520                 return snd_pcm_delay(substream, arg);
2521         case SNDRV_PCM_IOCTL_SYNC_PTR:
2522                 return snd_pcm_sync_ptr(substream, arg);
2523 #ifdef CONFIG_SND_SUPPORT_OLD_API
2524         case SNDRV_PCM_IOCTL_HW_REFINE_OLD:
2525                 return snd_pcm_hw_refine_old_user(substream, arg);
2526         case SNDRV_PCM_IOCTL_HW_PARAMS_OLD:
2527                 return snd_pcm_hw_params_old_user(substream, arg);
2528 #endif
2529         case SNDRV_PCM_IOCTL_DRAIN:
2530                 return snd_pcm_drain(substream);
2531         case SNDRV_PCM_IOCTL_DROP:
2532                 return snd_pcm_drop(substream);
2533         case SNDRV_PCM_IOCTL_PAUSE:
2534         {
2535                 int res;
2536                 snd_pcm_stream_lock_irq(substream);
2537                 res = snd_pcm_pause(substream, (int)(unsigned long)arg);
2538                 snd_pcm_stream_unlock_irq(substream);
2539                 return res;
2540         }
2541         }
2542         snd_printd("unknown ioctl = 0x%x\n", cmd);
2543         return -ENOTTY;
2544 }
2545
2546 static int snd_pcm_playback_ioctl1(struct file *file,
2547                                    struct snd_pcm_substream *substream,
2548                                    unsigned int cmd, void __user *arg)
2549 {
2550         if (snd_BUG_ON(!substream))
2551                 return -ENXIO;
2552         if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_PLAYBACK))
2553                 return -EINVAL;
2554         switch (cmd) {
2555         case SNDRV_PCM_IOCTL_WRITEI_FRAMES:
2556         {
2557                 struct snd_xferi xferi;
2558                 struct snd_xferi __user *_xferi = arg;
2559                 struct snd_pcm_runtime *runtime = substream->runtime;
2560                 snd_pcm_sframes_t result;
2561                 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2562                         return -EBADFD;
2563                 if (put_user(0, &_xferi->result))
2564                         return -EFAULT;
2565                 if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
2566                         return -EFAULT;
2567                 result = snd_pcm_lib_write(substream, xferi.buf, xferi.frames);
2568                 __put_user(result, &_xferi->result);
2569                 return result < 0 ? result : 0;
2570         }
2571         case SNDRV_PCM_IOCTL_WRITEN_FRAMES:
2572         {
2573                 struct snd_xfern xfern;
2574                 struct snd_xfern __user *_xfern = arg;
2575                 struct snd_pcm_runtime *runtime = substream->runtime;
2576                 void __user **bufs;
2577                 snd_pcm_sframes_t result;
2578                 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2579                         return -EBADFD;
2580                 if (runtime->channels > 128)
2581                         return -EINVAL;
2582                 if (put_user(0, &_xfern->result))
2583                         return -EFAULT;
2584                 if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
2585                         return -EFAULT;
2586
2587                 bufs = memdup_user(xfern.bufs,
2588                                    sizeof(void *) * runtime->channels);
2589                 if (IS_ERR(bufs))
2590                         return PTR_ERR(bufs);
2591                 result = snd_pcm_lib_writev(substream, bufs, xfern.frames);
2592                 kfree(bufs);
2593                 __put_user(result, &_xfern->result);
2594                 return result < 0 ? result : 0;
2595         }
2596         case SNDRV_PCM_IOCTL_REWIND:
2597         {
2598                 snd_pcm_uframes_t frames;
2599                 snd_pcm_uframes_t __user *_frames = arg;
2600                 snd_pcm_sframes_t result;
2601                 if (get_user(frames, _frames))
2602                         return -EFAULT;
2603                 if (put_user(0, _frames))
2604                         return -EFAULT;
2605                 result = snd_pcm_playback_rewind(substream, frames);
2606                 __put_user(result, _frames);
2607                 return result < 0 ? result : 0;
2608         }
2609         case SNDRV_PCM_IOCTL_FORWARD:
2610         {
2611                 snd_pcm_uframes_t frames;
2612                 snd_pcm_uframes_t __user *_frames = arg;
2613                 snd_pcm_sframes_t result;
2614                 if (get_user(frames, _frames))
2615                         return -EFAULT;
2616                 if (put_user(0, _frames))
2617                         return -EFAULT;
2618                 result = snd_pcm_playback_forward(substream, frames);
2619                 __put_user(result, _frames);
2620                 return result < 0 ? result : 0;
2621         }
2622         }
2623         return snd_pcm_common_ioctl1(file, substream, cmd, arg);
2624 }
2625
2626 static int snd_pcm_capture_ioctl1(struct file *file,
2627                                   struct snd_pcm_substream *substream,
2628                                   unsigned int cmd, void __user *arg)
2629 {
2630         if (snd_BUG_ON(!substream))
2631                 return -ENXIO;
2632         if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_CAPTURE))
2633                 return -EINVAL;
2634         switch (cmd) {
2635         case SNDRV_PCM_IOCTL_READI_FRAMES:
2636         {
2637                 struct snd_xferi xferi;
2638                 struct snd_xferi __user *_xferi = arg;
2639                 struct snd_pcm_runtime *runtime = substream->runtime;
2640                 snd_pcm_sframes_t result;
2641                 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2642                         return -EBADFD;
2643                 if (put_user(0, &_xferi->result))
2644                         return -EFAULT;
2645                 if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
2646                         return -EFAULT;
2647                 result = snd_pcm_lib_read(substream, xferi.buf, xferi.frames);
2648                 __put_user(result, &_xferi->result);
2649                 return result < 0 ? result : 0;
2650         }
2651         case SNDRV_PCM_IOCTL_READN_FRAMES:
2652         {
2653                 struct snd_xfern xfern;
2654                 struct snd_xfern __user *_xfern = arg;
2655                 struct snd_pcm_runtime *runtime = substream->runtime;
2656                 void *bufs;
2657                 snd_pcm_sframes_t result;
2658                 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2659                         return -EBADFD;
2660                 if (runtime->channels > 128)
2661                         return -EINVAL;
2662                 if (put_user(0, &_xfern->result))
2663                         return -EFAULT;
2664                 if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
2665                         return -EFAULT;
2666
2667                 bufs = memdup_user(xfern.bufs,
2668                                    sizeof(void *) * runtime->channels);
2669                 if (IS_ERR(bufs))
2670                         return PTR_ERR(bufs);
2671                 result = snd_pcm_lib_readv(substream, bufs, xfern.frames);
2672                 kfree(bufs);
2673                 __put_user(result, &_xfern->result);
2674                 return result < 0 ? result : 0;
2675         }
2676         case SNDRV_PCM_IOCTL_REWIND:
2677         {
2678                 snd_pcm_uframes_t frames;
2679                 snd_pcm_uframes_t __user *_frames = arg;
2680                 snd_pcm_sframes_t result;
2681                 if (get_user(frames, _frames))
2682                         return -EFAULT;
2683                 if (put_user(0, _frames))
2684                         return -EFAULT;
2685                 result = snd_pcm_capture_rewind(substream, frames);
2686                 __put_user(result, _frames);
2687                 return result < 0 ? result : 0;
2688         }
2689         case SNDRV_PCM_IOCTL_FORWARD:
2690         {
2691                 snd_pcm_uframes_t frames;
2692                 snd_pcm_uframes_t __user *_frames = arg;
2693                 snd_pcm_sframes_t result;
2694                 if (get_user(frames, _frames))
2695                         return -EFAULT;
2696                 if (put_user(0, _frames))
2697                         return -EFAULT;
2698                 result = snd_pcm_capture_forward(substream, frames);
2699                 __put_user(result, _frames);
2700                 return result < 0 ? result : 0;
2701         }
2702         }
2703         return snd_pcm_common_ioctl1(file, substream, cmd, arg);
2704 }
2705
2706 static long snd_pcm_playback_ioctl(struct file *file, unsigned int cmd,
2707                                    unsigned long arg)
2708 {
2709         struct snd_pcm_file *pcm_file;
2710
2711         pcm_file = file->private_data;
2712
2713         if (((cmd >> 8) & 0xff) != 'A')
2714                 return -ENOTTY;
2715
2716         return snd_pcm_playback_ioctl1(file, pcm_file->substream, cmd,
2717                                        (void __user *)arg);
2718 }
2719
2720 static long snd_pcm_capture_ioctl(struct file *file, unsigned int cmd,
2721                                   unsigned long arg)
2722 {
2723         struct snd_pcm_file *pcm_file;
2724
2725         pcm_file = file->private_data;
2726
2727         if (((cmd >> 8) & 0xff) != 'A')
2728                 return -ENOTTY;
2729
2730         return snd_pcm_capture_ioctl1(file, pcm_file->substream, cmd,
2731                                       (void __user *)arg);
2732 }
2733
2734 int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream,
2735                          unsigned int cmd, void *arg)
2736 {
2737         mm_segment_t fs;
2738         int result;
2739
2740         fs = snd_enter_user();
2741         switch (substream->stream) {
2742         case SNDRV_PCM_STREAM_PLAYBACK:
2743                 result = snd_pcm_playback_ioctl1(NULL, substream, cmd,
2744                                                  (void __user *)arg);
2745                 break;
2746         case SNDRV_PCM_STREAM_CAPTURE:
2747                 result = snd_pcm_capture_ioctl1(NULL, substream, cmd,
2748                                                 (void __user *)arg);
2749                 break;
2750         default:
2751                 result = -EINVAL;
2752                 break;
2753         }
2754         snd_leave_user(fs);
2755         return result;
2756 }
2757
2758 EXPORT_SYMBOL(snd_pcm_kernel_ioctl);
2759
2760 static ssize_t snd_pcm_read(struct file *file, char __user *buf, size_t count,
2761                             loff_t * offset)
2762 {
2763         struct snd_pcm_file *pcm_file;
2764         struct snd_pcm_substream *substream;
2765         struct snd_pcm_runtime *runtime;
2766         snd_pcm_sframes_t result;
2767
2768         pcm_file = file->private_data;
2769         substream = pcm_file->substream;
2770         if (PCM_RUNTIME_CHECK(substream))
2771                 return -ENXIO;
2772         runtime = substream->runtime;
2773         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2774                 return -EBADFD;
2775         if (!frame_aligned(runtime, count))
2776                 return -EINVAL;
2777         count = bytes_to_frames(runtime, count);
2778         result = snd_pcm_lib_read(substream, buf, count);
2779         if (result > 0)
2780                 result = frames_to_bytes(runtime, result);
2781         return result;
2782 }
2783
2784 static ssize_t snd_pcm_write(struct file *file, const char __user *buf,
2785                              size_t count, loff_t * offset)
2786 {
2787         struct snd_pcm_file *pcm_file;
2788         struct snd_pcm_substream *substream;
2789         struct snd_pcm_runtime *runtime;
2790         snd_pcm_sframes_t result;
2791
2792         pcm_file = file->private_data;
2793         substream = pcm_file->substream;
2794         if (PCM_RUNTIME_CHECK(substream))
2795                 return -ENXIO;
2796         runtime = substream->runtime;
2797         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2798                 return -EBADFD;
2799         if (!frame_aligned(runtime, count))
2800                 return -EINVAL;
2801         count = bytes_to_frames(runtime, count);
2802         result = snd_pcm_lib_write(substream, buf, count);
2803         if (result > 0)
2804                 result = frames_to_bytes(runtime, result);
2805         return result;
2806 }
2807
2808 static ssize_t snd_pcm_aio_read(struct kiocb *iocb, const struct iovec *iov,
2809                              unsigned long nr_segs, loff_t pos)
2810
2811 {
2812         struct snd_pcm_file *pcm_file;
2813         struct snd_pcm_substream *substream;
2814         struct snd_pcm_runtime *runtime;
2815         snd_pcm_sframes_t result;
2816         unsigned long i;
2817         void __user **bufs;
2818         snd_pcm_uframes_t frames;
2819
2820         pcm_file = iocb->ki_filp->private_data;
2821         substream = pcm_file->substream;
2822         if (PCM_RUNTIME_CHECK(substream))
2823                 return -ENXIO;
2824         runtime = substream->runtime;
2825         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2826                 return -EBADFD;
2827         if (nr_segs > 1024 || nr_segs != runtime->channels)
2828                 return -EINVAL;
2829         if (!frame_aligned(runtime, iov->iov_len))
2830                 return -EINVAL;
2831         frames = bytes_to_samples(runtime, iov->iov_len);
2832         bufs = kmalloc(sizeof(void *) * nr_segs, GFP_KERNEL);
2833         if (bufs == NULL)
2834                 return -ENOMEM;
2835         for (i = 0; i < nr_segs; ++i)
2836                 bufs[i] = iov[i].iov_base;
2837         result = snd_pcm_lib_readv(substream, bufs, frames);
2838         if (result > 0)
2839                 result = frames_to_bytes(runtime, result);
2840         kfree(bufs);
2841         return result;
2842 }
2843
2844 static ssize_t snd_pcm_aio_write(struct kiocb *iocb, const struct iovec *iov,
2845                               unsigned long nr_segs, loff_t pos)
2846 {
2847         struct snd_pcm_file *pcm_file;
2848         struct snd_pcm_substream *substream;
2849         struct snd_pcm_runtime *runtime;
2850         snd_pcm_sframes_t result;
2851         unsigned long i;
2852         void __user **bufs;
2853         snd_pcm_uframes_t frames;
2854
2855         pcm_file = iocb->ki_filp->private_data;
2856         substream = pcm_file->substream;
2857         if (PCM_RUNTIME_CHECK(substream))
2858                 return -ENXIO;
2859         runtime = substream->runtime;
2860         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2861                 return -EBADFD;
2862         if (nr_segs > 128 || nr_segs != runtime->channels ||
2863             !frame_aligned(runtime, iov->iov_len))
2864                 return -EINVAL;
2865         frames = bytes_to_samples(runtime, iov->iov_len);
2866         bufs = kmalloc(sizeof(void *) * nr_segs, GFP_KERNEL);
2867         if (bufs == NULL)
2868                 return -ENOMEM;
2869         for (i = 0; i < nr_segs; ++i)
2870                 bufs[i] = iov[i].iov_base;
2871         result = snd_pcm_lib_writev(substream, bufs, frames);
2872         if (result > 0)
2873                 result = frames_to_bytes(runtime, result);
2874         kfree(bufs);
2875         return result;
2876 }
2877
2878 static unsigned int snd_pcm_playback_poll(struct file *file, poll_table * wait)
2879 {
2880         struct snd_pcm_file *pcm_file;
2881         struct snd_pcm_substream *substream;
2882         struct snd_pcm_runtime *runtime;
2883         unsigned int mask;
2884         snd_pcm_uframes_t avail;
2885
2886         pcm_file = file->private_data;
2887
2888         substream = pcm_file->substream;
2889         if (PCM_RUNTIME_CHECK(substream))
2890                 return -ENXIO;
2891         runtime = substream->runtime;
2892
2893         poll_wait(file, &runtime->sleep, wait);
2894
2895         snd_pcm_stream_lock_irq(substream);
2896         avail = snd_pcm_playback_avail(runtime);
2897         switch (runtime->status->state) {
2898         case SNDRV_PCM_STATE_RUNNING:
2899         case SNDRV_PCM_STATE_PREPARED:
2900         case SNDRV_PCM_STATE_PAUSED:
2901                 if (avail >= runtime->control->avail_min) {
2902                         mask = POLLOUT | POLLWRNORM;
2903                         break;
2904                 }
2905                 /* Fall through */
2906         case SNDRV_PCM_STATE_DRAINING:
2907                 mask = 0;
2908                 break;
2909         default:
2910                 mask = POLLOUT | POLLWRNORM | POLLERR;
2911                 break;
2912         }
2913         snd_pcm_stream_unlock_irq(substream);
2914         return mask;
2915 }
2916
2917 static unsigned int snd_pcm_capture_poll(struct file *file, poll_table * wait)
2918 {
2919         struct snd_pcm_file *pcm_file;
2920         struct snd_pcm_substream *substream;
2921         struct snd_pcm_runtime *runtime;
2922         unsigned int mask;
2923         snd_pcm_uframes_t avail;
2924
2925         pcm_file = file->private_data;
2926
2927         substream = pcm_file->substream;
2928         if (PCM_RUNTIME_CHECK(substream))
2929                 return -ENXIO;
2930         runtime = substream->runtime;
2931
2932         poll_wait(file, &runtime->sleep, wait);
2933
2934         snd_pcm_stream_lock_irq(substream);
2935         avail = snd_pcm_capture_avail(runtime);
2936         switch (runtime->status->state) {
2937         case SNDRV_PCM_STATE_RUNNING:
2938         case SNDRV_PCM_STATE_PREPARED:
2939         case SNDRV_PCM_STATE_PAUSED:
2940                 if (avail >= runtime->control->avail_min) {
2941                         mask = POLLIN | POLLRDNORM;
2942                         break;
2943                 }
2944                 mask = 0;
2945                 break;
2946         case SNDRV_PCM_STATE_DRAINING:
2947                 if (avail > 0) {
2948                         mask = POLLIN | POLLRDNORM;
2949                         break;
2950                 }
2951                 /* Fall through */
2952         default:
2953                 mask = POLLIN | POLLRDNORM | POLLERR;
2954                 break;
2955         }
2956         snd_pcm_stream_unlock_irq(substream);
2957         return mask;
2958 }
2959
2960 /*
2961  * mmap support
2962  */
2963
2964 /*
2965  * Only on coherent architectures, we can mmap the status and the control records
2966  * for effcient data transfer.  On others, we have to use HWSYNC ioctl...
2967  */
2968 #if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA)
2969 /*
2970  * mmap status record
2971  */
2972 static int snd_pcm_mmap_status_fault(struct vm_area_struct *area,
2973                                                 struct vm_fault *vmf)
2974 {
2975         struct snd_pcm_substream *substream = area->vm_private_data;
2976         struct snd_pcm_runtime *runtime;
2977
2978         if (substream == NULL)
2979                 return VM_FAULT_SIGBUS;
2980         runtime = substream->runtime;
2981         vmf->page = virt_to_page(runtime->status);
2982         get_page(vmf->page);
2983         return 0;
2984 }
2985
2986 static struct vm_operations_struct snd_pcm_vm_ops_status =
2987 {
2988         .fault =        snd_pcm_mmap_status_fault,
2989 };
2990
2991 static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
2992                                struct vm_area_struct *area)
2993 {
2994         struct snd_pcm_runtime *runtime;
2995         long size;
2996         if (!(area->vm_flags & VM_READ))
2997                 return -EINVAL;
2998         runtime = substream->runtime;
2999         size = area->vm_end - area->vm_start;
3000         if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status)))
3001                 return -EINVAL;
3002         area->vm_ops = &snd_pcm_vm_ops_status;
3003         area->vm_private_data = substream;
3004         area->vm_flags |= VM_RESERVED;
3005         return 0;
3006 }
3007
3008 /*
3009  * mmap control record
3010  */
3011 static int snd_pcm_mmap_control_fault(struct vm_area_struct *area,
3012                                                 struct vm_fault *vmf)
3013 {
3014         struct snd_pcm_substream *substream = area->vm_private_data;
3015         struct snd_pcm_runtime *runtime;
3016
3017         if (substream == NULL)
3018                 return VM_FAULT_SIGBUS;
3019         runtime = substream->runtime;
3020         vmf->page = virt_to_page(runtime->control);
3021         get_page(vmf->page);
3022         return 0;
3023 }
3024
3025 static struct vm_operations_struct snd_pcm_vm_ops_control =
3026 {
3027         .fault =        snd_pcm_mmap_control_fault,
3028 };
3029
3030 static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
3031                                 struct vm_area_struct *area)
3032 {
3033         struct snd_pcm_runtime *runtime;
3034         long size;
3035         if (!(area->vm_flags & VM_READ))
3036                 return -EINVAL;
3037         runtime = substream->runtime;
3038         size = area->vm_end - area->vm_start;
3039         if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control)))
3040                 return -EINVAL;
3041         area->vm_ops = &snd_pcm_vm_ops_control;
3042         area->vm_private_data = substream;
3043         area->vm_flags |= VM_RESERVED;
3044         return 0;
3045 }
3046 #else /* ! coherent mmap */
3047 /*
3048  * don't support mmap for status and control records.
3049  */
3050 static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
3051                                struct vm_area_struct *area)
3052 {
3053         return -ENXIO;
3054 }
3055 static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
3056                                 struct vm_area_struct *area)
3057 {
3058         return -ENXIO;
3059 }
3060 #endif /* coherent mmap */
3061
3062 /*
3063  * fault callback for mmapping a RAM page
3064  */
3065 static int snd_pcm_mmap_data_fault(struct vm_area_struct *area,
3066                                                 struct vm_fault *vmf)
3067 {
3068         struct snd_pcm_substream *substream = area->vm_private_data;
3069         struct snd_pcm_runtime *runtime;
3070         unsigned long offset;
3071         struct page * page;
3072         void *vaddr;
3073         size_t dma_bytes;
3074
3075         if (substream == NULL)
3076                 return VM_FAULT_SIGBUS;
3077         runtime = substream->runtime;
3078         offset = vmf->pgoff << PAGE_SHIFT;
3079         dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3080         if (offset > dma_bytes - PAGE_SIZE)
3081                 return VM_FAULT_SIGBUS;
3082         if (substream->ops->page) {
3083                 page = substream->ops->page(substream, offset);
3084                 if (!page)
3085                         return VM_FAULT_SIGBUS;
3086         } else {
3087                 vaddr = runtime->dma_area + offset;
3088                 page = virt_to_page(vaddr);
3089         }
3090         get_page(page);
3091         vmf->page = page;
3092         return 0;
3093 }
3094
3095 static struct vm_operations_struct snd_pcm_vm_ops_data =
3096 {
3097         .open =         snd_pcm_mmap_data_open,
3098         .close =        snd_pcm_mmap_data_close,
3099         .fault =        snd_pcm_mmap_data_fault,
3100 };
3101
3102 /*
3103  * mmap the DMA buffer on RAM
3104  */
3105 static int snd_pcm_default_mmap(struct snd_pcm_substream *substream,
3106                                 struct vm_area_struct *area)
3107 {
3108         area->vm_ops = &snd_pcm_vm_ops_data;
3109         area->vm_private_data = substream;
3110         area->vm_flags |= VM_RESERVED;
3111         atomic_inc(&substream->mmap_count);
3112         return 0;
3113 }
3114
3115 /*
3116  * mmap the DMA buffer on I/O memory area
3117  */
3118 #if SNDRV_PCM_INFO_MMAP_IOMEM
3119 static struct vm_operations_struct snd_pcm_vm_ops_data_mmio =
3120 {
3121         .open =         snd_pcm_mmap_data_open,
3122         .close =        snd_pcm_mmap_data_close,
3123 };
3124
3125 int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream,
3126                            struct vm_area_struct *area)
3127 {
3128         long size;
3129         unsigned long offset;
3130
3131 #ifdef pgprot_noncached
3132         area->vm_page_prot = pgprot_noncached(area->vm_page_prot);
3133 #endif
3134         area->vm_ops = &snd_pcm_vm_ops_data_mmio;
3135         area->vm_private_data = substream;
3136         area->vm_flags |= VM_IO;
3137         size = area->vm_end - area->vm_start;
3138         offset = area->vm_pgoff << PAGE_SHIFT;
3139         if (io_remap_pfn_range(area, area->vm_start,
3140                                 (substream->runtime->dma_addr + offset) >> PAGE_SHIFT,
3141                                 size, area->vm_page_prot))
3142                 return -EAGAIN;
3143         atomic_inc(&substream->mmap_count);
3144         return 0;
3145 }
3146
3147 EXPORT_SYMBOL(snd_pcm_lib_mmap_iomem);
3148 #endif /* SNDRV_PCM_INFO_MMAP */
3149
3150 /*
3151  * mmap DMA buffer
3152  */
3153 int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file,
3154                       struct vm_area_struct *area)
3155 {
3156         struct snd_pcm_runtime *runtime;
3157         long size;
3158         unsigned long offset;
3159         size_t dma_bytes;
3160
3161         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
3162                 if (!(area->vm_flags & (VM_WRITE|VM_READ)))
3163                         return -EINVAL;
3164         } else {
3165                 if (!(area->vm_flags & VM_READ))
3166                         return -EINVAL;
3167         }
3168         runtime = substream->runtime;
3169         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3170                 return -EBADFD;
3171         if (!(runtime->info & SNDRV_PCM_INFO_MMAP))
3172                 return -ENXIO;
3173         if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED ||
3174             runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED)
3175                 return -EINVAL;
3176         size = area->vm_end - area->vm_start;
3177         offset = area->vm_pgoff << PAGE_SHIFT;
3178         dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3179         if ((size_t)size > dma_bytes)
3180                 return -EINVAL;
3181         if (offset > dma_bytes - size)
3182                 return -EINVAL;
3183
3184         if (substream->ops->mmap)
3185                 return substream->ops->mmap(substream, area);
3186         else
3187                 return snd_pcm_default_mmap(substream, area);
3188 }
3189
3190 EXPORT_SYMBOL(snd_pcm_mmap_data);
3191
3192 static int snd_pcm_mmap(struct file *file, struct vm_area_struct *area)
3193 {
3194         struct snd_pcm_file * pcm_file;
3195         struct snd_pcm_substream *substream;
3196         unsigned long offset;
3197
3198         pcm_file = file->private_data;
3199         substream = pcm_file->substream;
3200         if (PCM_RUNTIME_CHECK(substream))
3201                 return -ENXIO;
3202
3203         offset = area->vm_pgoff << PAGE_SHIFT;
3204         switch (offset) {
3205         case SNDRV_PCM_MMAP_OFFSET_STATUS:
3206                 if (pcm_file->no_compat_mmap)
3207                         return -ENXIO;
3208                 return snd_pcm_mmap_status(substream, file, area);
3209         case SNDRV_PCM_MMAP_OFFSET_CONTROL:
3210                 if (pcm_file->no_compat_mmap)
3211                         return -ENXIO;
3212                 return snd_pcm_mmap_control(substream, file, area);
3213         default:
3214                 return snd_pcm_mmap_data(substream, file, area);
3215         }
3216         return 0;
3217 }
3218
3219 static int snd_pcm_fasync(int fd, struct file * file, int on)
3220 {
3221         struct snd_pcm_file * pcm_file;
3222         struct snd_pcm_substream *substream;
3223         struct snd_pcm_runtime *runtime;
3224         int err = -ENXIO;
3225
3226         lock_kernel();
3227         pcm_file = file->private_data;
3228         substream = pcm_file->substream;
3229         if (PCM_RUNTIME_CHECK(substream))
3230                 goto out;
3231         runtime = substream->runtime;
3232         err = fasync_helper(fd, file, on, &runtime->fasync);
3233 out:
3234         unlock_kernel();
3235         return err;
3236 }
3237
3238 /*
3239  * ioctl32 compat
3240  */
3241 #ifdef CONFIG_COMPAT
3242 #include "pcm_compat.c"
3243 #else
3244 #define snd_pcm_ioctl_compat    NULL
3245 #endif
3246
3247 /*
3248  *  To be removed helpers to keep binary compatibility
3249  */
3250
3251 #ifdef CONFIG_SND_SUPPORT_OLD_API
3252 #define __OLD_TO_NEW_MASK(x) ((x&7)|((x&0x07fffff8)<<5))
3253 #define __NEW_TO_OLD_MASK(x) ((x&7)|((x&0xffffff00)>>5))
3254
3255 static void snd_pcm_hw_convert_from_old_params(struct snd_pcm_hw_params *params,
3256                                                struct snd_pcm_hw_params_old *oparams)
3257 {
3258         unsigned int i;
3259
3260         memset(params, 0, sizeof(*params));
3261         params->flags = oparams->flags;
3262         for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3263                 params->masks[i].bits[0] = oparams->masks[i];
3264         memcpy(params->intervals, oparams->intervals, sizeof(oparams->intervals));
3265         params->rmask = __OLD_TO_NEW_MASK(oparams->rmask);
3266         params->cmask = __OLD_TO_NEW_MASK(oparams->cmask);
3267         params->info = oparams->info;
3268         params->msbits = oparams->msbits;
3269         params->rate_num = oparams->rate_num;
3270         params->rate_den = oparams->rate_den;
3271         params->fifo_size = oparams->fifo_size;
3272 }
3273
3274 static void snd_pcm_hw_convert_to_old_params(struct snd_pcm_hw_params_old *oparams,
3275                                              struct snd_pcm_hw_params *params)
3276 {
3277         unsigned int i;
3278
3279         memset(oparams, 0, sizeof(*oparams));
3280         oparams->flags = params->flags;
3281         for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3282                 oparams->masks[i] = params->masks[i].bits[0];
3283         memcpy(oparams->intervals, params->intervals, sizeof(oparams->intervals));
3284         oparams->rmask = __NEW_TO_OLD_MASK(params->rmask);
3285         oparams->cmask = __NEW_TO_OLD_MASK(params->cmask);
3286         oparams->info = params->info;
3287         oparams->msbits = params->msbits;
3288         oparams->rate_num = params->rate_num;
3289         oparams->rate_den = params->rate_den;
3290         oparams->fifo_size = params->fifo_size;
3291 }
3292
3293 static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream,
3294                                       struct snd_pcm_hw_params_old __user * _oparams)
3295 {
3296         struct snd_pcm_hw_params *params;
3297         struct snd_pcm_hw_params_old *oparams = NULL;
3298         int err;
3299
3300         params = kmalloc(sizeof(*params), GFP_KERNEL);
3301         if (!params)
3302                 return -ENOMEM;
3303
3304         oparams = memdup_user(_oparams, sizeof(*oparams));
3305         if (IS_ERR(oparams)) {
3306                 err = PTR_ERR(oparams);
3307                 goto out;
3308         }
3309         snd_pcm_hw_convert_from_old_params(params, oparams);
3310         err = snd_pcm_hw_refine(substream, params);
3311         snd_pcm_hw_convert_to_old_params(oparams, params);
3312         if (copy_to_user(_oparams, oparams, sizeof(*oparams))) {
3313                 if (!err)
3314                         err = -EFAULT;
3315         }
3316
3317         kfree(oparams);
3318 out:
3319         kfree(params);
3320         return err;
3321 }
3322
3323 static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream,
3324                                       struct snd_pcm_hw_params_old __user * _oparams)
3325 {
3326         struct snd_pcm_hw_params *params;
3327         struct snd_pcm_hw_params_old *oparams = NULL;
3328         int err;
3329
3330         params = kmalloc(sizeof(*params), GFP_KERNEL);
3331         if (!params)
3332                 return -ENOMEM;
3333
3334         oparams = memdup_user(_oparams, sizeof(*oparams));
3335         if (IS_ERR(oparams)) {
3336                 err = PTR_ERR(oparams);
3337                 goto out;
3338         }
3339         snd_pcm_hw_convert_from_old_params(params, oparams);
3340         err = snd_pcm_hw_params(substream, params);
3341         snd_pcm_hw_convert_to_old_params(oparams, params);
3342         if (copy_to_user(_oparams, oparams, sizeof(*oparams))) {
3343                 if (!err)
3344                         err = -EFAULT;
3345         }
3346
3347         kfree(oparams);
3348 out:
3349         kfree(params);
3350         return err;
3351 }
3352 #endif /* CONFIG_SND_SUPPORT_OLD_API */
3353
3354 #ifndef CONFIG_MMU
3355 unsigned long dummy_get_unmapped_area(struct file *file, unsigned long addr,
3356                                       unsigned long len, unsigned long pgoff,
3357                                       unsigned long flags)
3358 {
3359         return 0;
3360 }
3361 #else
3362 # define dummy_get_unmapped_area NULL
3363 #endif
3364
3365 /*
3366  *  Register section
3367  */
3368
3369 const struct file_operations snd_pcm_f_ops[2] = {
3370         {
3371                 .owner =                THIS_MODULE,
3372                 .write =                snd_pcm_write,
3373                 .aio_write =            snd_pcm_aio_write,
3374                 .open =                 snd_pcm_playback_open,
3375                 .release =              snd_pcm_release,
3376                 .poll =                 snd_pcm_playback_poll,
3377                 .unlocked_ioctl =       snd_pcm_playback_ioctl,
3378                 .compat_ioctl =         snd_pcm_ioctl_compat,
3379                 .mmap =                 snd_pcm_mmap,
3380                 .fasync =               snd_pcm_fasync,
3381                 .get_unmapped_area =    dummy_get_unmapped_area,
3382         },
3383         {
3384                 .owner =                THIS_MODULE,
3385                 .read =                 snd_pcm_read,
3386                 .aio_read =             snd_pcm_aio_read,
3387                 .open =                 snd_pcm_capture_open,
3388                 .release =              snd_pcm_release,
3389                 .poll =                 snd_pcm_capture_poll,
3390                 .unlocked_ioctl =       snd_pcm_capture_ioctl,
3391                 .compat_ioctl =         snd_pcm_ioctl_compat,
3392                 .mmap =                 snd_pcm_mmap,
3393                 .fasync =               snd_pcm_fasync,
3394                 .get_unmapped_area =    dummy_get_unmapped_area,
3395         }
3396 };