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 <linux/dma-mapping.h>
  30 #include <sound/core.h>
  31 #include <sound/control.h>
  32 #include <sound/info.h>
  33 #include <sound/pcm.h>
  34 #include <sound/pcm_params.h>
  35 #include <sound/timer.h>
  36 #include <sound/minors.h>
  37 #include <asm/io.h>
  38 #if defined(CONFIG_MIPS) && defined(CONFIG_DMA_NONCOHERENT)
  39 #include <dma-coherence.h>
  40 #endif
  41
  42 /*
  43  *  Compatibility
  44  */
  45
  46 struct snd_pcm_hw_params_old {
  47         unsigned int flags;
  48         unsigned int masks[SNDRV_PCM_HW_PARAM_SUBFORMAT -
  49                            SNDRV_PCM_HW_PARAM_ACCESS + 1];
  50         struct snd_interval intervals[SNDRV_PCM_HW_PARAM_TICK_TIME -
  51                                         SNDRV_PCM_HW_PARAM_SAMPLE_BITS + 1];
  52         unsigned int rmask;
  53         unsigned int cmask;
  54         unsigned int info;
  55         unsigned int msbits;
  56         unsigned int rate_num;
  57         unsigned int rate_den;
  58         snd_pcm_uframes_t fifo_size;
  59         unsigned char reserved[64];
  60 };
  61
  62 #ifdef CONFIG_SND_SUPPORT_OLD_API
  63 #define SNDRV_PCM_IOCTL_HW_REFINE_OLD _IOWR('A', 0x10, struct snd_pcm_hw_params_old)
  64 #define SNDRV_PCM_IOCTL_HW_PARAMS_OLD _IOWR('A', 0x11, struct snd_pcm_hw_params_old)
  65
  66 static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream,
  67                                       struct snd_pcm_hw_params_old __user * _oparams);
  68 static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream,
  69                                       struct snd_pcm_hw_params_old __user * _oparams);
  70 #endif
  71 static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream);
  72
  73 /*
  74  *
  75  */
  76
  77 DEFINE_RWLOCK(snd_pcm_link_rwlock);
  78 EXPORT_SYMBOL(snd_pcm_link_rwlock);
  79
  80 static DECLARE_RWSEM(snd_pcm_link_rwsem);
  81
  82 static inline mm_segment_t snd_enter_user(void)
  83 {
  84         mm_segment_t fs = get_fs();
  85         set_fs(get_ds());
  86         return fs;
  87 }
  88
  89 static inline void snd_leave_user(mm_segment_t fs)
  90 {
  91         set_fs(fs);
  92 }
  93
  94
  95
  96 int snd_pcm_info(struct snd_pcm_substream *substream, struct snd_pcm_info *info)
  97 {
  98         struct snd_pcm_runtime *runtime;
  99         struct snd_pcm *pcm = substream->pcm;
 100         struct snd_pcm_str *pstr = substream->pstr;
 101
 102         memset(info, 0, sizeof(*info));
 103         info->card = pcm->card->number;
 104         info->device = pcm->device;
 105         info->stream = substream->stream;
 106         info->subdevice = substream->number;
 107         strlcpy(info->id, pcm->id, sizeof(info->id));
 108         strlcpy(info->name, pcm->name, sizeof(info->name));
 109         info->dev_class = pcm->dev_class;
 110         info->dev_subclass = pcm->dev_subclass;
 111         info->subdevices_count = pstr->substream_count;
 112         info->subdevices_avail = pstr->substream_count - pstr->substream_opened;
 113         strlcpy(info->subname, substream->name, sizeof(info->subname));
 114         runtime = substream->runtime;
 115         /* AB: FIXME!!! This is definitely nonsense */
 116         if (runtime) {
 117                 info->sync = runtime->sync;
 118                 substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_INFO, info);
 119         }
 120         return 0;
 121 }
 122
 123 int snd_pcm_info_user(struct snd_pcm_substream *substream,
 124                       struct snd_pcm_info __user * _info)
 125 {
 126         struct snd_pcm_info *info;
 127         int err;
 128
 129         info = kmalloc(sizeof(*info), GFP_KERNEL);
 130         if (! info)
 131                 return -ENOMEM;
 132         err = snd_pcm_info(substream, info);
 133         if (err >= 0) {
 134                 if (copy_to_user(_info, info, sizeof(*info)))
 135                         err = -EFAULT;
 136         }
 137         kfree(info);
 138         return err;
 139 }
 140
 141 #undef RULES_DEBUG
 142
 143 #ifdef RULES_DEBUG
 144 #define HW_PARAM(v) [SNDRV_PCM_HW_PARAM_##v] = #v
 145 char *snd_pcm_hw_param_names[] = {
 146         HW_PARAM(ACCESS),
 147         HW_PARAM(FORMAT),
 148         HW_PARAM(SUBFORMAT),
 149         HW_PARAM(SAMPLE_BITS),
 150         HW_PARAM(FRAME_BITS),
 151         HW_PARAM(CHANNELS),
 152         HW_PARAM(RATE),
 153         HW_PARAM(PERIOD_TIME),
 154         HW_PARAM(PERIOD_SIZE),
 155         HW_PARAM(PERIOD_BYTES),
 156         HW_PARAM(PERIODS),
 157         HW_PARAM(BUFFER_TIME),
 158         HW_PARAM(BUFFER_SIZE),
 159         HW_PARAM(BUFFER_BYTES),
 160         HW_PARAM(TICK_TIME),
 161 };
 162 #endif
 163
 164 int snd_pcm_hw_refine(struct snd_pcm_substream *substream,
 165                       struct snd_pcm_hw_params *params)
 166 {
 167         unsigned int k;
 168         struct snd_pcm_hardware *hw;
 169         struct snd_interval *i = NULL;
 170         struct snd_mask *m = NULL;
 171         struct snd_pcm_hw_constraints *constrs = &substream->runtime->hw_constraints;
 172         unsigned int rstamps[constrs->rules_num];
 173         unsigned int vstamps[SNDRV_PCM_HW_PARAM_LAST_INTERVAL + 1];
 174         unsigned int stamp = 2;
 175         int changed, again;
 176
 177         params->info = 0;
 178         params->fifo_size = 0;
 179         if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_SAMPLE_BITS))
 180                 params->msbits = 0;
 181         if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_RATE)) {
 182                 params->rate_num = 0;
 183                 params->rate_den = 0;
 184         }
 185
 186         for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
 187                 m = hw_param_mask(params, k);
 188                 if (snd_mask_empty(m))
 189                         return -EINVAL;
 190                 if (!(params->rmask & (1 << k)))
 191                         continue;
 192 #ifdef RULES_DEBUG
 193                 printk(KERN_DEBUG "%s = ", snd_pcm_hw_param_names[k]);
 194                 printk("%04x%04x%04x%04x -> ", m->bits[3], m->bits[2], m->bits[1], m->bits[0]);
 195 #endif
 196                 changed = snd_mask_refine(m, constrs_mask(constrs, k));
 197 #ifdef RULES_DEBUG
 198                 printk("%04x%04x%04x%04x\n", m->bits[3], m->bits[2], m->bits[1], m->bits[0]);
 199 #endif
 200                 if (changed)
 201                         params->cmask |= 1 << k;
 202                 if (changed < 0)
 203                         return changed;
 204         }
 205
 206         for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
 207                 i = hw_param_interval(params, k);
 208                 if (snd_interval_empty(i))
 209                         return -EINVAL;
 210                 if (!(params->rmask & (1 << k)))
 211                         continue;
 212 #ifdef RULES_DEBUG
 213                 printk(KERN_DEBUG "%s = ", snd_pcm_hw_param_names[k]);
 214                 if (i->empty)
 215                         printk("empty");
 216                 else
 217                         printk("%c%u %u%c",
 218                                i->openmin ? '(' : '[', i->min,
 219                                i->max, i->openmax ? ')' : ']');
 220                 printk(" -> ");
 221 #endif
 222                 changed = snd_interval_refine(i, constrs_interval(constrs, k));
 223 #ifdef RULES_DEBUG
 224                 if (i->empty)
 225                         printk("empty\n");
 226                 else
 227                         printk("%c%u %u%c\n",
 228                                i->openmin ? '(' : '[', i->min,
 229                                i->max, i->openmax ? ')' : ']');
 230 #endif
 231                 if (changed)
 232                         params->cmask |= 1 << k;
 233                 if (changed < 0)
 234                         return changed;
 235         }
 236
 237         for (k = 0; k < constrs->rules_num; k++)
 238                 rstamps[k] = 0;
 239         for (k = 0; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++)
 240                 vstamps[k] = (params->rmask & (1 << k)) ? 1 : 0;
 241         do {
 242                 again = 0;
 243                 for (k = 0; k < constrs->rules_num; k++) {
 244                         struct snd_pcm_hw_rule *r = &constrs->rules[k];
 245                         unsigned int d;
 246                         int doit = 0;
 247                         if (r->cond && !(r->cond & params->flags))
 248                                 continue;
 249                         for (d = 0; r->deps[d] >= 0; d++) {
 250                                 if (vstamps[r->deps[d]] > rstamps[k]) {
 251                                         doit = 1;
 252                                         break;
 253                                 }
 254                         }
 255                         if (!doit)
 256                                 continue;
 257 #ifdef RULES_DEBUG
 258                         printk(KERN_DEBUG "Rule %d [%p]: ", k, r->func);
 259                         if (r->var >= 0) {
 260                                 printk("%s = ", snd_pcm_hw_param_names[r->var]);
 261                                 if (hw_is_mask(r->var)) {
 262                                         m = hw_param_mask(params, r->var);
 263                                         printk("%x", *m->bits);
 264                                 } else {
 265                                         i = hw_param_interval(params, r->var);
 266                                         if (i->empty)
 267                                                 printk("empty");
 268                                         else
 269                                                 printk("%c%u %u%c",
 270                                                        i->openmin ? '(' : '[', i->min,
 271                                                        i->max, i->openmax ? ')' : ']');
 272                                 }
 273                         }
 274 #endif
 275                         changed = r->func(params, r);
 276 #ifdef RULES_DEBUG
 277                         if (r->var >= 0) {
 278                                 printk(" -> ");
 279                                 if (hw_is_mask(r->var))
 280                                         printk("%x", *m->bits);
 281                                 else {
 282                                         if (i->empty)
 283                                                 printk("empty");
 284                                         else
 285                                                 printk("%c%u %u%c",
 286                                                        i->openmin ? '(' : '[', i->min,
 287                                                        i->max, i->openmax ? ')' : ']');
 288                                 }
 289                         }
 290                         printk("\n");
 291 #endif
 292                         rstamps[k] = stamp;
 293                         if (changed && r->var >= 0) {
 294                                 params->cmask |= (1 << r->var);
 295                                 vstamps[r->var] = stamp;
 296                                 again = 1;
 297                         }
 298                         if (changed < 0)
 299                                 return changed;
 300                         stamp++;
 301                 }
 302         } while (again);
 303         if (!params->msbits) {
 304                 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS);
 305                 if (snd_interval_single(i))
 306                         params->msbits = snd_interval_value(i);
 307         }
 308
 309         if (!params->rate_den) {
 310                 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
 311                 if (snd_interval_single(i)) {
 312                         params->rate_num = snd_interval_value(i);
 313                         params->rate_den = 1;
 314                 }
 315         }
 316
 317         hw = &substream->runtime->hw;
 318         if (!params->info)
 319                 params->info = hw->info & ~SNDRV_PCM_INFO_FIFO_IN_FRAMES;
 320         if (!params->fifo_size) {
 321                 m = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
 322                 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
 323                 if (snd_mask_min(m) == snd_mask_max(m) &&
 324                     snd_interval_min(i) == snd_interval_max(i)) {
 325                         changed = substream->ops->ioctl(substream,
 326                                         SNDRV_PCM_IOCTL1_FIFO_SIZE, params);
 327                         if (changed < 0)
 328                                 return changed;
 329                 }
 330         }
 331         params->rmask = 0;
 332         return 0;
 333 }
 334
 335 EXPORT_SYMBOL(snd_pcm_hw_refine);
 336
 337 static int snd_pcm_hw_refine_user(struct snd_pcm_substream *substream,
 338                                   struct snd_pcm_hw_params __user * _params)
 339 {
 340         struct snd_pcm_hw_params *params;
 341         int err;
 342
 343         params = memdup_user(_params, sizeof(*params));
 344         if (IS_ERR(params))
 345                 return PTR_ERR(params);
 346
 347         err = snd_pcm_hw_refine(substream, params);
 348         if (copy_to_user(_params, params, sizeof(*params))) {
 349                 if (!err)
 350                         err = -EFAULT;
 351         }
 352
 353         kfree(params);
 354         return err;
 355 }
 356
 357 static int period_to_usecs(struct snd_pcm_runtime *runtime)
 358 {
 359         int usecs;
 360
 361         if (! runtime->rate)
 362                 return -1; /* invalid */
 363
 364         /* take 75% of period time as the deadline */
 365         usecs = (750000 / runtime->rate) * runtime->period_size;
 366         usecs += ((750000 % runtime->rate) * runtime->period_size) /
 367                 runtime->rate;
 368
 369         return usecs;
 370 }
 371
 372 static int snd_pcm_hw_params(struct snd_pcm_substream *substream,
 373                              struct snd_pcm_hw_params *params)
 374 {
 375         struct snd_pcm_runtime *runtime;
 376         int err, usecs;
 377         unsigned int bits;
 378         snd_pcm_uframes_t frames;
 379
 380         if (PCM_RUNTIME_CHECK(substream))
 381                 return -ENXIO;
 382         runtime = substream->runtime;
 383         snd_pcm_stream_lock_irq(substream);
 384         switch (runtime->status->state) {
 385         case SNDRV_PCM_STATE_OPEN:
 386         case SNDRV_PCM_STATE_SETUP:
 387         case SNDRV_PCM_STATE_PREPARED:
 388                 break;
 389         default:
 390                 snd_pcm_stream_unlock_irq(substream);
 391                 return -EBADFD;
 392         }
 393         snd_pcm_stream_unlock_irq(substream);
 394 #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
 395         if (!substream->oss.oss)
 396 #endif
 397                 if (atomic_read(&substream->mmap_count))
 398                         return -EBADFD;
 399
 400         params->rmask = ~0U;
 401         err = snd_pcm_hw_refine(substream, params);
 402         if (err < 0)
 403                 goto _error;
 404
 405         err = snd_pcm_hw_params_choose(substream, params);
 406         if (err < 0)
 407                 goto _error;
 408
 409         if (substream->ops->hw_params != NULL) {
 410                 err = substream->ops->hw_params(substream, params);
 411                 if (err < 0)
 412                         goto _error;
 413         }
 414
 415         runtime->access = params_access(params);
 416         runtime->format = params_format(params);
 417         runtime->subformat = params_subformat(params);
 418         runtime->channels = params_channels(params);
 419         runtime->rate = params_rate(params);
 420         runtime->period_size = params_period_size(params);
 421         runtime->periods = params_periods(params);
 422         runtime->buffer_size = params_buffer_size(params);
 423         runtime->info = params->info;
 424         runtime->rate_num = params->rate_num;
 425         runtime->rate_den = params->rate_den;
 426
 427         bits = snd_pcm_format_physical_width(runtime->format);
 428         runtime->sample_bits = bits;
 429         bits *= runtime->channels;
 430         runtime->frame_bits = bits;
 431         frames = 1;
 432         while (bits % 8 != 0) {
 433                 bits *= 2;
 434                 frames *= 2;
 435         }
 436         runtime->byte_align = bits / 8;
 437         runtime->min_align = frames;
 438
 439         /* Default sw params */
 440         runtime->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
 441         runtime->period_step = 1;
 442         runtime->control->avail_min = runtime->period_size;
 443         runtime->start_threshold = 1;
 444         runtime->stop_threshold = runtime->buffer_size;
 445         runtime->silence_threshold = 0;
 446         runtime->silence_size = 0;
 447         runtime->boundary = runtime->buffer_size;
 448         while (runtime->boundary * 2 <= LONG_MAX - runtime->buffer_size)
 449                 runtime->boundary *= 2;
 450
 451         snd_pcm_timer_resolution_change(substream);
 452         runtime->status->state = SNDRV_PCM_STATE_SETUP;
 453
 454         if (pm_qos_request_active(&substream->latency_pm_qos_req))
 455                 pm_qos_remove_request(&substream->latency_pm_qos_req);
 456         if ((usecs = period_to_usecs(runtime)) >= 0)
 457                 pm_qos_add_request(&substream->latency_pm_qos_req,
 458                                    PM_QOS_CPU_DMA_LATENCY, usecs);
 459         return 0;
 460  _error:
 461         /* hardware might be unuseable from this time,
 462            so we force application to retry to set
 463            the correct hardware parameter settings */
 464         runtime->status->state = SNDRV_PCM_STATE_OPEN;
 465         if (substream->ops->hw_free != NULL)
 466                 substream->ops->hw_free(substream);
 467         return err;
 468 }
 469
 470 static int snd_pcm_hw_params_user(struct snd_pcm_substream *substream,
 471                                   struct snd_pcm_hw_params __user * _params)
 472 {
 473         struct snd_pcm_hw_params *params;
 474         int err;
 475
 476         params = memdup_user(_params, sizeof(*params));
 477         if (IS_ERR(params))
 478                 return PTR_ERR(params);
 479
 480         err = snd_pcm_hw_params(substream, params);
 481         if (copy_to_user(_params, params, sizeof(*params))) {
 482                 if (!err)
 483                         err = -EFAULT;
 484         }
 485
 486         kfree(params);
 487         return err;
 488 }
 489
 490 static int snd_pcm_hw_free(struct snd_pcm_substream *substream)
 491 {
 492         struct snd_pcm_runtime *runtime;
 493         int result = 0;
 494
 495         if (PCM_RUNTIME_CHECK(substream))
 496                 return -ENXIO;
 497         runtime = substream->runtime;
 498         snd_pcm_stream_lock_irq(substream);
 499         switch (runtime->status->state) {
 500         case SNDRV_PCM_STATE_SETUP:
 501         case SNDRV_PCM_STATE_PREPARED:
 502                 break;
 503         default:
 504                 snd_pcm_stream_unlock_irq(substream);
 505                 return -EBADFD;
 506         }
 507         snd_pcm_stream_unlock_irq(substream);
 508         if (atomic_read(&substream->mmap_count))
 509                 return -EBADFD;
 510         if (substream->ops->hw_free)
 511                 result = substream->ops->hw_free(substream);
 512         runtime->status->state = SNDRV_PCM_STATE_OPEN;
 513         pm_qos_remove_request(&substream->latency_pm_qos_req);
 514         return result;
 515 }
 516
 517 static int snd_pcm_sw_params(struct snd_pcm_substream *substream,
 518                              struct snd_pcm_sw_params *params)
 519 {
 520         struct snd_pcm_runtime *runtime;
 521         int err;
 522
 523         if (PCM_RUNTIME_CHECK(substream))
 524                 return -ENXIO;
 525         runtime = substream->runtime;
 526         snd_pcm_stream_lock_irq(substream);
 527         if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
 528                 snd_pcm_stream_unlock_irq(substream);
 529                 return -EBADFD;
 530         }
 531         snd_pcm_stream_unlock_irq(substream);
 532
 533         if (params->tstamp_mode > SNDRV_PCM_TSTAMP_LAST)
 534                 return -EINVAL;
 535         if (params->avail_min == 0)
 536                 return -EINVAL;
 537         if (params->silence_size >= runtime->boundary) {
 538                 if (params->silence_threshold != 0)
 539                         return -EINVAL;
 540         } else {
 541                 if (params->silence_size > params->silence_threshold)
 542                         return -EINVAL;
 543                 if (params->silence_threshold > runtime->buffer_size)
 544                         return -EINVAL;
 545         }
 546         err = 0;
 547         snd_pcm_stream_lock_irq(substream);
 548         runtime->tstamp_mode = params->tstamp_mode;
 549         runtime->period_step = params->period_step;
 550         runtime->control->avail_min = params->avail_min;
 551         runtime->start_threshold = params->start_threshold;
 552         runtime->stop_threshold = params->stop_threshold;
 553         runtime->silence_threshold = params->silence_threshold;
 554         runtime->silence_size = params->silence_size;
 555         params->boundary = runtime->boundary;
 556         if (snd_pcm_running(substream)) {
 557                 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
 558                     runtime->silence_size > 0)
 559                         snd_pcm_playback_silence(substream, ULONG_MAX);
 560                 err = snd_pcm_update_state(substream, runtime);
 561         }
 562         snd_pcm_stream_unlock_irq(substream);
 563         return err;
 564 }
 565
 566 static int snd_pcm_sw_params_user(struct snd_pcm_substream *substream,
 567                                   struct snd_pcm_sw_params __user * _params)
 568 {
 569         struct snd_pcm_sw_params params;
 570         int err;
 571         if (copy_from_user(&params, _params, sizeof(params)))
 572                 return -EFAULT;
 573         err = snd_pcm_sw_params(substream, &params);
 574         if (copy_to_user(_params, &params, sizeof(params)))
 575                 return -EFAULT;
 576         return err;
 577 }
 578
 579 int snd_pcm_status(struct snd_pcm_substream *substream,
 580                    struct snd_pcm_status *status)
 581 {
 582         struct snd_pcm_runtime *runtime = substream->runtime;
 583
 584         snd_pcm_stream_lock_irq(substream);
 585         status->state = runtime->status->state;
 586         status->suspended_state = runtime->status->suspended_state;
 587         if (status->state == SNDRV_PCM_STATE_OPEN)
 588                 goto _end;
 589         status->trigger_tstamp = runtime->trigger_tstamp;
 590         if (snd_pcm_running(substream)) {
 591                 snd_pcm_update_hw_ptr(substream);
 592                 if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) {
 593                         status->tstamp = runtime->status->tstamp;
 594                         goto _tstamp_end;
 595                 }
 596         }
 597         snd_pcm_gettime(runtime, &status->tstamp);
 598  _tstamp_end:
 599         status->appl_ptr = runtime->control->appl_ptr;
 600         status->hw_ptr = runtime->status->hw_ptr;
 601         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 602                 status->avail = snd_pcm_playback_avail(runtime);
 603                 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING ||
 604                     runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
 605                         status->delay = runtime->buffer_size - status->avail;
 606                         status->delay += runtime->delay;
 607                 } else
 608                         status->delay = 0;
 609         } else {
 610                 status->avail = snd_pcm_capture_avail(runtime);
 611                 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING)
 612                         status->delay = status->avail + runtime->delay;
 613                 else
 614                         status->delay = 0;
 615         }
 616         status->avail_max = runtime->avail_max;
 617         status->overrange = runtime->overrange;
 618         runtime->avail_max = 0;
 619         runtime->overrange = 0;
 620  _end:
 621         snd_pcm_stream_unlock_irq(substream);
 622         return 0;
 623 }
 624
 625 static int snd_pcm_status_user(struct snd_pcm_substream *substream,
 626                                struct snd_pcm_status __user * _status)
 627 {
 628         struct snd_pcm_status status;
 629         int res;
 630
 631         memset(&status, 0, sizeof(status));
 632         res = snd_pcm_status(substream, &status);
 633         if (res < 0)
 634                 return res;
 635         if (copy_to_user(_status, &status, sizeof(status)))
 636                 return -EFAULT;
 637         return 0;
 638 }
 639
 640 static int snd_pcm_channel_info(struct snd_pcm_substream *substream,
 641                                 struct snd_pcm_channel_info * info)
 642 {
 643         struct snd_pcm_runtime *runtime;
 644         unsigned int channel;
 645
 646         channel = info->channel;
 647         runtime = substream->runtime;
 648         snd_pcm_stream_lock_irq(substream);
 649         if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
 650                 snd_pcm_stream_unlock_irq(substream);
 651                 return -EBADFD;
 652         }
 653         snd_pcm_stream_unlock_irq(substream);
 654         if (channel >= runtime->channels)
 655                 return -EINVAL;
 656         memset(info, 0, sizeof(*info));
 657         info->channel = channel;
 658         return substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_CHANNEL_INFO, info);
 659 }
 660
 661 static int snd_pcm_channel_info_user(struct snd_pcm_substream *substream,
 662                                      struct snd_pcm_channel_info __user * _info)
 663 {
 664         struct snd_pcm_channel_info info;
 665         int res;
 666
 667         if (copy_from_user(&info, _info, sizeof(info)))
 668                 return -EFAULT;
 669         res = snd_pcm_channel_info(substream, &info);
 670         if (res < 0)
 671                 return res;
 672         if (copy_to_user(_info, &info, sizeof(info)))
 673                 return -EFAULT;
 674         return 0;
 675 }
 676
 677 static void snd_pcm_trigger_tstamp(struct snd_pcm_substream *substream)
 678 {
 679         struct snd_pcm_runtime *runtime = substream->runtime;
 680         if (runtime->trigger_master == NULL)
 681                 return;
 682         if (runtime->trigger_master == substream) {
 683                 snd_pcm_gettime(runtime, &runtime->trigger_tstamp);
 684         } else {
 685                 snd_pcm_trigger_tstamp(runtime->trigger_master);
 686                 runtime->trigger_tstamp = runtime->trigger_master->runtime->trigger_tstamp;
 687         }
 688         runtime->trigger_master = NULL;
 689 }
 690
 691 struct action_ops {
 692         int (*pre_action)(struct snd_pcm_substream *substream, int state);
 693         int (*do_action)(struct snd_pcm_substream *substream, int state);
 694         void (*undo_action)(struct snd_pcm_substream *substream, int state);
 695         void (*post_action)(struct snd_pcm_substream *substream, int state);
 696 };
 697
 698 /*
 699  *  this functions is core for handling of linked stream
 700  *  Note: the stream state might be changed also on failure
 701  *  Note2: call with calling stream lock + link lock
 702  */
 703 static int snd_pcm_action_group(struct action_ops *ops,
 704                                 struct snd_pcm_substream *substream,
 705                                 int state, int do_lock)
 706 {
 707         struct snd_pcm_substream *s = NULL;
 708         struct snd_pcm_substream *s1;
 709         int res = 0;
 710
 711         snd_pcm_group_for_each_entry(s, substream) {
 712                 if (do_lock && s != substream)
 713                         spin_lock_nested(&s->self_group.lock,
 714                                          SINGLE_DEPTH_NESTING);
 715                 res = ops->pre_action(s, state);
 716                 if (res < 0)
 717                         goto _unlock;
 718         }
 719         snd_pcm_group_for_each_entry(s, substream) {
 720                 res = ops->do_action(s, state);
 721                 if (res < 0) {
 722                         if (ops->undo_action) {
 723                                 snd_pcm_group_for_each_entry(s1, substream) {
 724                                         if (s1 == s) /* failed stream */
 725                                                 break;
 726                                         ops->undo_action(s1, state);
 727                                 }
 728                         }
 729                         s = NULL; /* unlock all */
 730                         goto _unlock;
 731                 }
 732         }
 733         snd_pcm_group_for_each_entry(s, substream) {
 734                 ops->post_action(s, state);
 735         }
 736  _unlock:
 737         if (do_lock) {
 738                 /* unlock streams */
 739                 snd_pcm_group_for_each_entry(s1, substream) {
 740                         if (s1 != substream)
 741                                 spin_unlock(&s1->self_group.lock);
 742                         if (s1 == s)    /* end */
 743                                 break;
 744                 }
 745         }
 746         return res;
 747 }
 748
 749 /*
 750  *  Note: call with stream lock
 751  */
 752 static int snd_pcm_action_single(struct action_ops *ops,
 753                                  struct snd_pcm_substream *substream,
 754                                  int state)
 755 {
 756         int res;
 757
 758         res = ops->pre_action(substream, state);
 759         if (res < 0)
 760                 return res;
 761         res = ops->do_action(substream, state);
 762         if (res == 0)
 763                 ops->post_action(substream, state);
 764         else if (ops->undo_action)
 765                 ops->undo_action(substream, state);
 766         return res;
 767 }
 768
 769 /*
 770  *  Note: call with stream lock
 771  */
 772 static int snd_pcm_action(struct action_ops *ops,
 773                           struct snd_pcm_substream *substream,
 774                           int state)
 775 {
 776         int res;
 777
 778         if (snd_pcm_stream_linked(substream)) {
 779                 if (!spin_trylock(&substream->group->lock)) {
 780                         spin_unlock(&substream->self_group.lock);
 781                         spin_lock(&substream->group->lock);
 782                         spin_lock(&substream->self_group.lock);
 783                 }
 784                 res = snd_pcm_action_group(ops, substream, state, 1);
 785                 spin_unlock(&substream->group->lock);
 786         } else {
 787                 res = snd_pcm_action_single(ops, substream, state);
 788         }
 789         return res;
 790 }
 791
 792 /*
 793  *  Note: don't use any locks before
 794  */
 795 static int snd_pcm_action_lock_irq(struct action_ops *ops,
 796                                    struct snd_pcm_substream *substream,
 797                                    int state)
 798 {
 799         int res;
 800
 801         read_lock_irq(&snd_pcm_link_rwlock);
 802         if (snd_pcm_stream_linked(substream)) {
 803                 spin_lock(&substream->group->lock);
 804                 spin_lock(&substream->self_group.lock);
 805                 res = snd_pcm_action_group(ops, substream, state, 1);
 806                 spin_unlock(&substream->self_group.lock);
 807                 spin_unlock(&substream->group->lock);
 808         } else {
 809                 spin_lock(&substream->self_group.lock);
 810                 res = snd_pcm_action_single(ops, substream, state);
 811                 spin_unlock(&substream->self_group.lock);
 812         }
 813         read_unlock_irq(&snd_pcm_link_rwlock);
 814         return res;
 815 }
 816
 817 /*
 818  */
 819 static int snd_pcm_action_nonatomic(struct action_ops *ops,
 820                                     struct snd_pcm_substream *substream,
 821                                     int state)
 822 {
 823         int res;
 824
 825         down_read(&snd_pcm_link_rwsem);
 826         if (snd_pcm_stream_linked(substream))
 827                 res = snd_pcm_action_group(ops, substream, state, 0);
 828         else
 829                 res = snd_pcm_action_single(ops, substream, state);
 830         up_read(&snd_pcm_link_rwsem);
 831         return res;
 832 }
 833
 834 /*
 835  * start callbacks
 836  */
 837 static int snd_pcm_pre_start(struct snd_pcm_substream *substream, int state)
 838 {
 839         struct snd_pcm_runtime *runtime = substream->runtime;
 840         if (runtime->status->state != SNDRV_PCM_STATE_PREPARED)
 841                 return -EBADFD;
 842         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
 843             !snd_pcm_playback_data(substream))
 844                 return -EPIPE;
 845         runtime->trigger_master = substream;
 846         return 0;
 847 }
 848
 849 static int snd_pcm_do_start(struct snd_pcm_substream *substream, int state)
 850 {
 851         if (substream->runtime->trigger_master != substream)
 852                 return 0;
 853         return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_START);
 854 }
 855
 856 static void snd_pcm_undo_start(struct snd_pcm_substream *substream, int state)
 857 {
 858         if (substream->runtime->trigger_master == substream)
 859                 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
 860 }
 861
 862 static void snd_pcm_post_start(struct snd_pcm_substream *substream, int state)
 863 {
 864         struct snd_pcm_runtime *runtime = substream->runtime;
 865         snd_pcm_trigger_tstamp(substream);
 866         runtime->hw_ptr_jiffies = jiffies;
 867         runtime->status->state = state;
 868         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
 869             runtime->silence_size > 0)
 870                 snd_pcm_playback_silence(substream, ULONG_MAX);
 871         if (substream->timer)
 872                 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTART,
 873                                  &runtime->trigger_tstamp);
 874 }
 875
 876 static struct action_ops snd_pcm_action_start = {
 877         .pre_action = snd_pcm_pre_start,
 878         .do_action = snd_pcm_do_start,
 879         .undo_action = snd_pcm_undo_start,
 880         .post_action = snd_pcm_post_start
 881 };
 882
 883 /**
 884  * snd_pcm_start - start all linked streams
 885  * @substream: the PCM substream instance
 886  */
 887 int snd_pcm_start(struct snd_pcm_substream *substream)
 888 {
 889         return snd_pcm_action(&snd_pcm_action_start, substream,
 890                               SNDRV_PCM_STATE_RUNNING);
 891 }
 892
 893 /*
 894  * stop callbacks
 895  */
 896 static int snd_pcm_pre_stop(struct snd_pcm_substream *substream, int state)
 897 {
 898         struct snd_pcm_runtime *runtime = substream->runtime;
 899         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
 900                 return -EBADFD;
 901         runtime->trigger_master = substream;
 902         return 0;
 903 }
 904
 905 static int snd_pcm_do_stop(struct snd_pcm_substream *substream, int state)
 906 {
 907         if (substream->runtime->trigger_master == substream &&
 908             snd_pcm_running(substream))
 909                 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
 910         return 0; /* unconditonally stop all substreams */
 911 }
 912
 913 static void snd_pcm_post_stop(struct snd_pcm_substream *substream, int state)
 914 {
 915         struct snd_pcm_runtime *runtime = substream->runtime;
 916         if (runtime->status->state != state) {
 917                 snd_pcm_trigger_tstamp(substream);
 918                 if (substream->timer)
 919                         snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTOP,
 920                                          &runtime->trigger_tstamp);
 921                 runtime->status->state = state;
 922         }
 923         wake_up(&runtime->sleep);
 924         wake_up(&runtime->tsleep);
 925 }
 926
 927 static struct action_ops snd_pcm_action_stop = {
 928         .pre_action = snd_pcm_pre_stop,
 929         .do_action = snd_pcm_do_stop,
 930         .post_action = snd_pcm_post_stop
 931 };
 932
 933 /**
 934  * snd_pcm_stop - try to stop all running streams in the substream group
 935  * @substream: the PCM substream instance
 936  * @state: PCM state after stopping the stream
 937  *
 938  * The state of each stream is then changed to the given state unconditionally.
 939  */
 940 int snd_pcm_stop(struct snd_pcm_substream *substream, int state)
 941 {
 942         return snd_pcm_action(&snd_pcm_action_stop, substream, state);
 943 }
 944
 945 EXPORT_SYMBOL(snd_pcm_stop);
 946
 947 /**
 948  * snd_pcm_drain_done - stop the DMA only when the given stream is playback
 949  * @substream: the PCM substream
 950  *
 951  * After stopping, the state is changed to SETUP.
 952  * Unlike snd_pcm_stop(), this affects only the given stream.
 953  */
 954 int snd_pcm_drain_done(struct snd_pcm_substream *substream)
 955 {
 956         return snd_pcm_action_single(&snd_pcm_action_stop, substream,
 957                                      SNDRV_PCM_STATE_SETUP);
 958 }
 959
 960 /*
 961  * pause callbacks
 962  */
 963 static int snd_pcm_pre_pause(struct snd_pcm_substream *substream, int push)
 964 {
 965         struct snd_pcm_runtime *runtime = substream->runtime;
 966         if (!(runtime->info & SNDRV_PCM_INFO_PAUSE))
 967                 return -ENOSYS;
 968         if (push) {
 969                 if (runtime->status->state != SNDRV_PCM_STATE_RUNNING)
 970                         return -EBADFD;
 971         } else if (runtime->status->state != SNDRV_PCM_STATE_PAUSED)
 972                 return -EBADFD;
 973         runtime->trigger_master = substream;
 974         return 0;
 975 }
 976
 977 static int snd_pcm_do_pause(struct snd_pcm_substream *substream, int push)
 978 {
 979         if (substream->runtime->trigger_master != substream)
 980                 return 0;
 981         /* The jiffies check in snd_pcm_update_hw_ptr*() is done by
 982          * a delta betwen the current jiffies, this gives a large enough
 983          * delta, effectively to skip the check once.
 984          */
 985         substream->runtime->hw_ptr_jiffies = jiffies - HZ * 1000;
 986         return substream->ops->trigger(substream,
 987                                        push ? SNDRV_PCM_TRIGGER_PAUSE_PUSH :
 988                                               SNDRV_PCM_TRIGGER_PAUSE_RELEASE);
 989 }
 990
 991 static void snd_pcm_undo_pause(struct snd_pcm_substream *substream, int push)
 992 {
 993         if (substream->runtime->trigger_master == substream)
 994                 substream->ops->trigger(substream,
 995                                         push ? SNDRV_PCM_TRIGGER_PAUSE_RELEASE :
 996                                         SNDRV_PCM_TRIGGER_PAUSE_PUSH);
 997 }
 998
 999 static void snd_pcm_post_pause(struct snd_pcm_substream *substream, int push)
1000 {
1001         struct snd_pcm_runtime *runtime = substream->runtime;
1002         snd_pcm_trigger_tstamp(substream);
1003         if (push) {
1004                 runtime->status->state = SNDRV_PCM_STATE_PAUSED;
1005                 if (substream->timer)
1006                         snd_timer_notify(substream->timer,
1007                                          SNDRV_TIMER_EVENT_MPAUSE,
1008                                          &runtime->trigger_tstamp);
1009                 wake_up(&runtime->sleep);
1010                 wake_up(&runtime->tsleep);
1011         } else {
1012                 runtime->status->state = SNDRV_PCM_STATE_RUNNING;
1013                 if (substream->timer)
1014                         snd_timer_notify(substream->timer,
1015                                          SNDRV_TIMER_EVENT_MCONTINUE,
1016                                          &runtime->trigger_tstamp);
1017         }
1018 }
1019
1020 static struct action_ops snd_pcm_action_pause = {
1021         .pre_action = snd_pcm_pre_pause,
1022         .do_action = snd_pcm_do_pause,
1023         .undo_action = snd_pcm_undo_pause,
1024         .post_action = snd_pcm_post_pause
1025 };
1026
1027 /*
1028  * Push/release the pause for all linked streams.
1029  */
1030 static int snd_pcm_pause(struct snd_pcm_substream *substream, int push)
1031 {
1032         return snd_pcm_action(&snd_pcm_action_pause, substream, push);
1033 }
1034
1035 #ifdef CONFIG_PM
1036 /* suspend */
1037
1038 static int snd_pcm_pre_suspend(struct snd_pcm_substream *substream, int state)
1039 {
1040         struct snd_pcm_runtime *runtime = substream->runtime;
1041         if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1042                 return -EBUSY;
1043         runtime->trigger_master = substream;
1044         return 0;
1045 }
1046
1047 static int snd_pcm_do_suspend(struct snd_pcm_substream *substream, int state)
1048 {
1049         struct snd_pcm_runtime *runtime = substream->runtime;
1050         if (runtime->trigger_master != substream)
1051                 return 0;
1052         if (! snd_pcm_running(substream))
1053                 return 0;
1054         substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1055         return 0; /* suspend unconditionally */
1056 }
1057
1058 static void snd_pcm_post_suspend(struct snd_pcm_substream *substream, int state)
1059 {
1060         struct snd_pcm_runtime *runtime = substream->runtime;
1061         snd_pcm_trigger_tstamp(substream);
1062         if (substream->timer)
1063                 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSUSPEND,
1064                                  &runtime->trigger_tstamp);
1065         runtime->status->suspended_state = runtime->status->state;
1066         runtime->status->state = SNDRV_PCM_STATE_SUSPENDED;
1067         wake_up(&runtime->sleep);
1068         wake_up(&runtime->tsleep);
1069 }
1070
1071 static struct action_ops snd_pcm_action_suspend = {
1072         .pre_action = snd_pcm_pre_suspend,
1073         .do_action = snd_pcm_do_suspend,
1074         .post_action = snd_pcm_post_suspend
1075 };
1076
1077 /**
1078  * snd_pcm_suspend - trigger SUSPEND to all linked streams
1079  * @substream: the PCM substream
1080  *
1081  * After this call, all streams are changed to SUSPENDED state.
1082  */
1083 int snd_pcm_suspend(struct snd_pcm_substream *substream)
1084 {
1085         int err;
1086         unsigned long flags;
1087
1088         if (! substream)
1089                 return 0;
1090
1091         snd_pcm_stream_lock_irqsave(substream, flags);
1092         err = snd_pcm_action(&snd_pcm_action_suspend, substream, 0);
1093         snd_pcm_stream_unlock_irqrestore(substream, flags);
1094         return err;
1095 }
1096
1097 EXPORT_SYMBOL(snd_pcm_suspend);
1098
1099 /**
1100  * snd_pcm_suspend_all - trigger SUSPEND to all substreams in the given pcm
1101  * @pcm: the PCM instance
1102  *
1103  * After this call, all streams are changed to SUSPENDED state.
1104  */
1105 int snd_pcm_suspend_all(struct snd_pcm *pcm)
1106 {
1107         struct snd_pcm_substream *substream;
1108         int stream, err = 0;
1109
1110         if (! pcm)
1111                 return 0;
1112
1113         for (stream = 0; stream < 2; stream++) {
1114                 for (substream = pcm->streams[stream].substream;
1115                      substream; substream = substream->next) {
1116                         /* FIXME: the open/close code should lock this as well */
1117                         if (substream->runtime == NULL)
1118                                 continue;
1119                         err = snd_pcm_suspend(substream);
1120                         if (err < 0 && err != -EBUSY)
1121                                 return err;
1122                 }
1123         }
1124         return 0;
1125 }
1126
1127 EXPORT_SYMBOL(snd_pcm_suspend_all);
1128
1129 /* resume */
1130
1131 static int snd_pcm_pre_resume(struct snd_pcm_substream *substream, int state)
1132 {
1133         struct snd_pcm_runtime *runtime = substream->runtime;
1134         if (!(runtime->info & SNDRV_PCM_INFO_RESUME))
1135                 return -ENOSYS;
1136         runtime->trigger_master = substream;
1137         return 0;
1138 }
1139
1140 static int snd_pcm_do_resume(struct snd_pcm_substream *substream, int state)
1141 {
1142         struct snd_pcm_runtime *runtime = substream->runtime;
1143         if (runtime->trigger_master != substream)
1144                 return 0;
1145         /* DMA not running previously? */
1146         if (runtime->status->suspended_state != SNDRV_PCM_STATE_RUNNING &&
1147             (runtime->status->suspended_state != SNDRV_PCM_STATE_DRAINING ||
1148              substream->stream != SNDRV_PCM_STREAM_PLAYBACK))
1149                 return 0;
1150         return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_RESUME);
1151 }
1152
1153 static void snd_pcm_undo_resume(struct snd_pcm_substream *substream, int state)
1154 {
1155         if (substream->runtime->trigger_master == substream &&
1156             snd_pcm_running(substream))
1157                 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1158 }
1159
1160 static void snd_pcm_post_resume(struct snd_pcm_substream *substream, int state)
1161 {
1162         struct snd_pcm_runtime *runtime = substream->runtime;
1163         snd_pcm_trigger_tstamp(substream);
1164         if (substream->timer)
1165                 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MRESUME,
1166                                  &runtime->trigger_tstamp);
1167         runtime->status->state = runtime->status->suspended_state;
1168 }
1169
1170 static struct action_ops snd_pcm_action_resume = {
1171         .pre_action = snd_pcm_pre_resume,
1172         .do_action = snd_pcm_do_resume,
1173         .undo_action = snd_pcm_undo_resume,
1174         .post_action = snd_pcm_post_resume
1175 };
1176
1177 static int snd_pcm_resume(struct snd_pcm_substream *substream)
1178 {
1179         struct snd_card *card = substream->pcm->card;
1180         int res;
1181
1182         snd_power_lock(card);
1183         if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0)
1184                 res = snd_pcm_action_lock_irq(&snd_pcm_action_resume, substream, 0);
1185         snd_power_unlock(card);
1186         return res;
1187 }
1188
1189 #else
1190
1191 static int snd_pcm_resume(struct snd_pcm_substream *substream)
1192 {
1193         return -ENOSYS;
1194 }
1195
1196 #endif /* CONFIG_PM */
1197
1198 /*
1199  * xrun ioctl
1200  *
1201  * Change the RUNNING stream(s) to XRUN state.
1202  */
1203 static int snd_pcm_xrun(struct snd_pcm_substream *substream)
1204 {
1205         struct snd_card *card = substream->pcm->card;
1206         struct snd_pcm_runtime *runtime = substream->runtime;
1207         int result;
1208
1209         snd_power_lock(card);
1210         if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1211                 result = snd_power_wait(card, SNDRV_CTL_POWER_D0);
1212                 if (result < 0)
1213                         goto _unlock;
1214         }
1215
1216         snd_pcm_stream_lock_irq(substream);
1217         switch (runtime->status->state) {
1218         case SNDRV_PCM_STATE_XRUN:
1219                 result = 0;     /* already there */
1220                 break;
1221         case SNDRV_PCM_STATE_RUNNING:
1222                 result = snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
1223                 break;
1224         default:
1225                 result = -EBADFD;
1226         }
1227         snd_pcm_stream_unlock_irq(substream);
1228  _unlock:
1229         snd_power_unlock(card);
1230         return result;
1231 }
1232
1233 /*
1234  * reset ioctl
1235  */
1236 static int snd_pcm_pre_reset(struct snd_pcm_substream *substream, int state)
1237 {
1238         struct snd_pcm_runtime *runtime = substream->runtime;
1239         switch (runtime->status->state) {
1240         case SNDRV_PCM_STATE_RUNNING:
1241         case SNDRV_PCM_STATE_PREPARED:
1242         case SNDRV_PCM_STATE_PAUSED:
1243         case SNDRV_PCM_STATE_SUSPENDED:
1244                 return 0;
1245         default:
1246                 return -EBADFD;
1247         }
1248 }
1249
1250 static int snd_pcm_do_reset(struct snd_pcm_substream *substream, int state)
1251 {
1252         struct snd_pcm_runtime *runtime = substream->runtime;
1253         int err = substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_RESET, NULL);
1254         if (err < 0)
1255                 return err;
1256         runtime->hw_ptr_base = 0;
1257         runtime->hw_ptr_interrupt = runtime->status->hw_ptr -
1258                 runtime->status->hw_ptr % runtime->period_size;
1259         runtime->silence_start = runtime->status->hw_ptr;
1260         runtime->silence_filled = 0;
1261         return 0;
1262 }
1263
1264 static void snd_pcm_post_reset(struct snd_pcm_substream *substream, int state)
1265 {
1266         struct snd_pcm_runtime *runtime = substream->runtime;
1267         runtime->control->appl_ptr = runtime->status->hw_ptr;
1268         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
1269             runtime->silence_size > 0)
1270                 snd_pcm_playback_silence(substream, ULONG_MAX);
1271 }
1272
1273 static struct action_ops snd_pcm_action_reset = {
1274         .pre_action = snd_pcm_pre_reset,
1275         .do_action = snd_pcm_do_reset,
1276         .post_action = snd_pcm_post_reset
1277 };
1278
1279 static int snd_pcm_reset(struct snd_pcm_substream *substream)
1280 {
1281         return snd_pcm_action_nonatomic(&snd_pcm_action_reset, substream, 0);
1282 }
1283
1284 /*
1285  * prepare ioctl
1286  */
1287 /* we use the second argument for updating f_flags */
1288 static int snd_pcm_pre_prepare(struct snd_pcm_substream *substream,
1289                                int f_flags)
1290 {
1291         struct snd_pcm_runtime *runtime = substream->runtime;
1292         if (runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1293             runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED)
1294                 return -EBADFD;
1295         if (snd_pcm_running(substream))
1296                 return -EBUSY;
1297         substream->f_flags = f_flags;
1298         return 0;
1299 }
1300
1301 static int snd_pcm_do_prepare(struct snd_pcm_substream *substream, int state)
1302 {
1303         int err;
1304         err = substream->ops->prepare(substream);
1305         if (err < 0)
1306                 return err;
1307         return snd_pcm_do_reset(substream, 0);
1308 }
1309
1310 static void snd_pcm_post_prepare(struct snd_pcm_substream *substream, int state)
1311 {
1312         struct snd_pcm_runtime *runtime = substream->runtime;
1313         runtime->control->appl_ptr = runtime->status->hw_ptr;
1314         runtime->status->state = SNDRV_PCM_STATE_PREPARED;
1315 }
1316
1317 static struct action_ops snd_pcm_action_prepare = {
1318         .pre_action = snd_pcm_pre_prepare,
1319         .do_action = snd_pcm_do_prepare,
1320         .post_action = snd_pcm_post_prepare
1321 };
1322
1323 /**
1324  * snd_pcm_prepare - prepare the PCM substream to be triggerable
1325  * @substream: the PCM substream instance
1326  * @file: file to refer f_flags
1327  */
1328 static int snd_pcm_prepare(struct snd_pcm_substream *substream,
1329                            struct file *file)
1330 {
1331         int res;
1332         struct snd_card *card = substream->pcm->card;
1333         int f_flags;
1334
1335         if (file)
1336                 f_flags = file->f_flags;
1337         else
1338                 f_flags = substream->f_flags;
1339
1340         snd_power_lock(card);
1341         if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0)
1342                 res = snd_pcm_action_nonatomic(&snd_pcm_action_prepare,
1343                                                substream, f_flags);
1344         snd_power_unlock(card);
1345         return res;
1346 }
1347
1348 /*
1349  * drain ioctl
1350  */
1351
1352 static int snd_pcm_pre_drain_init(struct snd_pcm_substream *substream, int state)
1353 {
1354         substream->runtime->trigger_master = substream;
1355         return 0;
1356 }
1357
1358 static int snd_pcm_do_drain_init(struct snd_pcm_substream *substream, int state)
1359 {
1360         struct snd_pcm_runtime *runtime = substream->runtime;
1361         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
1362                 switch (runtime->status->state) {
1363                 case SNDRV_PCM_STATE_PREPARED:
1364                         /* start playback stream if possible */
1365                         if (! snd_pcm_playback_empty(substream)) {
1366                                 snd_pcm_do_start(substream, SNDRV_PCM_STATE_DRAINING);
1367                                 snd_pcm_post_start(substream, SNDRV_PCM_STATE_DRAINING);
1368                         }
1369                         break;
1370                 case SNDRV_PCM_STATE_RUNNING:
1371                         runtime->status->state = SNDRV_PCM_STATE_DRAINING;
1372                         break;
1373                 default:
1374                         break;
1375                 }
1376         } else {
1377                 /* stop running stream */
1378                 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) {
1379                         int new_state = snd_pcm_capture_avail(runtime) > 0 ?
1380                                 SNDRV_PCM_STATE_DRAINING : SNDRV_PCM_STATE_SETUP;
1381                         snd_pcm_do_stop(substream, new_state);
1382                         snd_pcm_post_stop(substream, new_state);
1383                 }
1384         }
1385         return 0;
1386 }
1387
1388 static void snd_pcm_post_drain_init(struct snd_pcm_substream *substream, int state)
1389 {
1390 }
1391
1392 static struct action_ops snd_pcm_action_drain_init = {
1393         .pre_action = snd_pcm_pre_drain_init,
1394         .do_action = snd_pcm_do_drain_init,
1395         .post_action = snd_pcm_post_drain_init
1396 };
1397
1398 static int snd_pcm_drop(struct snd_pcm_substream *substream);
1399
1400 /*
1401  * Drain the stream(s).
1402  * When the substream is linked, sync until the draining of all playback streams
1403  * is finished.
1404  * After this call, all streams are supposed to be either SETUP or DRAINING
1405  * (capture only) state.
1406  */
1407 static int snd_pcm_drain(struct snd_pcm_substream *substream,
1408                          struct file *file)
1409 {
1410         struct snd_card *card;
1411         struct snd_pcm_runtime *runtime;
1412         struct snd_pcm_substream *s;
1413         wait_queue_t wait;
1414         int result = 0;
1415         int nonblock = 0;
1416
1417         card = substream->pcm->card;
1418         runtime = substream->runtime;
1419
1420         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
1421                 return -EBADFD;
1422
1423         snd_power_lock(card);
1424         if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1425                 result = snd_power_wait(card, SNDRV_CTL_POWER_D0);
1426                 if (result < 0) {
1427                         snd_power_unlock(card);
1428                         return result;
1429                 }
1430         }
1431
1432         if (file) {
1433                 if (file->f_flags & O_NONBLOCK)
1434                         nonblock = 1;
1435         } else if (substream->f_flags & O_NONBLOCK)
1436                 nonblock = 1;
1437
1438         down_read(&snd_pcm_link_rwsem);
1439         snd_pcm_stream_lock_irq(substream);
1440         /* resume pause */
1441         if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
1442                 snd_pcm_pause(substream, 0);
1443
1444         /* pre-start/stop - all running streams are changed to DRAINING state */
1445         result = snd_pcm_action(&snd_pcm_action_drain_init, substream, 0);
1446         if (result < 0)
1447                 goto unlock;
1448         /* in non-blocking, we don't wait in ioctl but let caller poll */
1449         if (nonblock) {
1450                 result = -EAGAIN;
1451                 goto unlock;
1452         }
1453
1454         for (;;) {
1455                 long tout;
1456                 struct snd_pcm_runtime *to_check;
1457                 if (signal_pending(current)) {
1458                         result = -ERESTARTSYS;
1459                         break;
1460                 }
1461                 /* find a substream to drain */
1462                 to_check = NULL;
1463                 snd_pcm_group_for_each_entry(s, substream) {
1464                         if (s->stream != SNDRV_PCM_STREAM_PLAYBACK)
1465                                 continue;
1466                         runtime = s->runtime;
1467                         if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
1468                                 to_check = runtime;
1469                                 break;
1470                         }
1471                 }
1472                 if (!to_check)
1473                         break; /* all drained */
1474                 init_waitqueue_entry(&wait, current);
1475                 add_wait_queue(&to_check->sleep, &wait);
1476                 set_current_state(TASK_INTERRUPTIBLE);
1477                 snd_pcm_stream_unlock_irq(substream);
1478                 up_read(&snd_pcm_link_rwsem);
1479                 snd_power_unlock(card);
1480                 tout = schedule_timeout(10 * HZ);
1481                 snd_power_lock(card);
1482                 down_read(&snd_pcm_link_rwsem);
1483                 snd_pcm_stream_lock_irq(substream);
1484                 remove_wait_queue(&to_check->sleep, &wait);
1485                 if (tout == 0) {
1486                         if (substream->runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1487                                 result = -ESTRPIPE;
1488                         else {
1489                                 snd_printd("playback drain error (DMA or IRQ trouble?)\n");
1490                                 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1491                                 result = -EIO;
1492                         }
1493                         break;
1494                 }
1495         }
1496
1497  unlock:
1498         snd_pcm_stream_unlock_irq(substream);
1499         up_read(&snd_pcm_link_rwsem);
1500         snd_power_unlock(card);
1501
1502         return result;
1503 }
1504
1505 /*
1506  * drop ioctl
1507  *
1508  * Immediately put all linked substreams into SETUP state.
1509  */
1510 static int snd_pcm_drop(struct snd_pcm_substream *substream)
1511 {
1512         struct snd_pcm_runtime *runtime;
1513         struct snd_card *card;
1514         int result = 0;
1515
1516         if (PCM_RUNTIME_CHECK(substream))
1517                 return -ENXIO;
1518         runtime = substream->runtime;
1519         card = substream->pcm->card;
1520
1521         if (runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1522             runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED ||
1523             runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1524                 return -EBADFD;
1525
1526         snd_pcm_stream_lock_irq(substream);
1527         /* resume pause */
1528         if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
1529                 snd_pcm_pause(substream, 0);
1530
1531         snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1532         /* runtime->control->appl_ptr = runtime->status->hw_ptr; */
1533         snd_pcm_stream_unlock_irq(substream);
1534
1535         return result;
1536 }
1537
1538
1539 /* WARNING: Don't forget to fput back the file */
1540 static struct file *snd_pcm_file_fd(int fd)
1541 {
1542         struct file *file;
1543         struct inode *inode;
1544         unsigned int minor;
1545
1546         file = fget(fd);
1547         if (!file)
1548                 return NULL;
1549         inode = file->f_path.dentry->d_inode;
1550         if (!S_ISCHR(inode->i_mode) ||
1551             imajor(inode) != snd_major) {
1552                 fput(file);
1553                 return NULL;
1554         }
1555         minor = iminor(inode);
1556         if (!snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_PLAYBACK) &&
1557             !snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_CAPTURE)) {
1558                 fput(file);
1559                 return NULL;
1560         }
1561         return file;
1562 }
1563
1564 /*
1565  * PCM link handling
1566  */
1567 static int snd_pcm_link(struct snd_pcm_substream *substream, int fd)
1568 {
1569         int res = 0;
1570         struct file *file;
1571         struct snd_pcm_file *pcm_file;
1572         struct snd_pcm_substream *substream1;
1573
1574         file = snd_pcm_file_fd(fd);
1575         if (!file)
1576                 return -EBADFD;
1577         pcm_file = file->private_data;
1578         substream1 = pcm_file->substream;
1579         down_write(&snd_pcm_link_rwsem);
1580         write_lock_irq(&snd_pcm_link_rwlock);
1581         if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1582             substream->runtime->status->state != substream1->runtime->status->state) {
1583                 res = -EBADFD;
1584                 goto _end;
1585         }
1586         if (snd_pcm_stream_linked(substream1)) {
1587                 res = -EALREADY;
1588                 goto _end;
1589         }
1590         if (!snd_pcm_stream_linked(substream)) {
1591                 substream->group = kmalloc(sizeof(struct snd_pcm_group), GFP_ATOMIC);
1592                 if (substream->group == NULL) {
1593                         res = -ENOMEM;
1594                         goto _end;
1595                 }
1596                 spin_lock_init(&substream->group->lock);
1597                 INIT_LIST_HEAD(&substream->group->substreams);
1598                 list_add_tail(&substream->link_list, &substream->group->substreams);
1599                 substream->group->count = 1;
1600         }
1601         list_add_tail(&substream1->link_list, &substream->group->substreams);
1602         substream->group->count++;
1603         substream1->group = substream->group;
1604  _end:
1605         write_unlock_irq(&snd_pcm_link_rwlock);
1606         up_write(&snd_pcm_link_rwsem);
1607         fput(file);
1608         return res;
1609 }
1610
1611 static void relink_to_local(struct snd_pcm_substream *substream)
1612 {
1613         substream->group = &substream->self_group;
1614         INIT_LIST_HEAD(&substream->self_group.substreams);
1615         list_add_tail(&substream->link_list, &substream->self_group.substreams);
1616 }
1617
1618 static int snd_pcm_unlink(struct snd_pcm_substream *substream)
1619 {
1620         struct snd_pcm_substream *s;
1621         int res = 0;
1622
1623         down_write(&snd_pcm_link_rwsem);
1624         write_lock_irq(&snd_pcm_link_rwlock);
1625         if (!snd_pcm_stream_linked(substream)) {
1626                 res = -EALREADY;
1627                 goto _end;
1628         }
1629         list_del(&substream->link_list);
1630         substream->group->count--;
1631         if (substream->group->count == 1) {     /* detach the last stream, too */
1632                 snd_pcm_group_for_each_entry(s, substream) {
1633                         relink_to_local(s);
1634                         break;
1635                 }
1636                 kfree(substream->group);
1637         }
1638         relink_to_local(substream);
1639        _end:
1640         write_unlock_irq(&snd_pcm_link_rwlock);
1641         up_write(&snd_pcm_link_rwsem);
1642         return res;
1643 }
1644
1645 /*
1646  * hw configurator
1647  */
1648 static int snd_pcm_hw_rule_mul(struct snd_pcm_hw_params *params,
1649                                struct snd_pcm_hw_rule *rule)
1650 {
1651         struct snd_interval t;
1652         snd_interval_mul(hw_param_interval_c(params, rule->deps[0]),
1653                      hw_param_interval_c(params, rule->deps[1]), &t);
1654         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1655 }
1656
1657 static int snd_pcm_hw_rule_div(struct snd_pcm_hw_params *params,
1658                                struct snd_pcm_hw_rule *rule)
1659 {
1660         struct snd_interval t;
1661         snd_interval_div(hw_param_interval_c(params, rule->deps[0]),
1662                      hw_param_interval_c(params, rule->deps[1]), &t);
1663         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1664 }
1665
1666 static int snd_pcm_hw_rule_muldivk(struct snd_pcm_hw_params *params,
1667                                    struct snd_pcm_hw_rule *rule)
1668 {
1669         struct snd_interval t;
1670         snd_interval_muldivk(hw_param_interval_c(params, rule->deps[0]),
1671                          hw_param_interval_c(params, rule->deps[1]),
1672                          (unsigned long) rule->private, &t);
1673         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1674 }
1675
1676 static int snd_pcm_hw_rule_mulkdiv(struct snd_pcm_hw_params *params,
1677                                    struct snd_pcm_hw_rule *rule)
1678 {
1679         struct snd_interval t;
1680         snd_interval_mulkdiv(hw_param_interval_c(params, rule->deps[0]),
1681                          (unsigned long) rule->private,
1682                          hw_param_interval_c(params, rule->deps[1]), &t);
1683         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1684 }
1685
1686 static int snd_pcm_hw_rule_format(struct snd_pcm_hw_params *params,
1687                                   struct snd_pcm_hw_rule *rule)
1688 {
1689         unsigned int k;
1690         struct snd_interval *i = hw_param_interval(params, rule->deps[0]);
1691         struct snd_mask m;
1692         struct snd_mask *mask = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1693         snd_mask_any(&m);
1694         for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
1695                 int bits;
1696                 if (! snd_mask_test(mask, k))
1697                         continue;
1698                 bits = snd_pcm_format_physical_width(k);
1699                 if (bits <= 0)
1700                         continue; /* ignore invalid formats */
1701                 if ((unsigned)bits < i->min || (unsigned)bits > i->max)
1702                         snd_mask_reset(&m, k);
1703         }
1704         return snd_mask_refine(mask, &m);
1705 }
1706
1707 static int snd_pcm_hw_rule_sample_bits(struct snd_pcm_hw_params *params,
1708                                        struct snd_pcm_hw_rule *rule)
1709 {
1710         struct snd_interval t;
1711         unsigned int k;
1712         t.min = UINT_MAX;
1713         t.max = 0;
1714         t.openmin = 0;
1715         t.openmax = 0;
1716         for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
1717                 int bits;
1718                 if (! snd_mask_test(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT), k))
1719                         continue;
1720                 bits = snd_pcm_format_physical_width(k);
1721                 if (bits <= 0)
1722                         continue; /* ignore invalid formats */
1723                 if (t.min > (unsigned)bits)
1724                         t.min = bits;
1725                 if (t.max < (unsigned)bits)
1726                         t.max = bits;
1727         }
1728         t.integer = 1;
1729         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1730 }
1731
1732 #if SNDRV_PCM_RATE_5512 != 1 << 0 || SNDRV_PCM_RATE_192000 != 1 << 12
1733 #error "Change this table"
1734 #endif
1735
1736 static unsigned int rates[] = { 5512, 8000, 11025, 16000, 22050, 32000, 44100,
1737                                  48000, 64000, 88200, 96000, 176400, 192000 };
1738
1739 const struct snd_pcm_hw_constraint_list snd_pcm_known_rates = {
1740         .count = ARRAY_SIZE(rates),
1741         .list = rates,
1742 };
1743
1744 static int snd_pcm_hw_rule_rate(struct snd_pcm_hw_params *params,
1745                                 struct snd_pcm_hw_rule *rule)
1746 {
1747         struct snd_pcm_hardware *hw = rule->private;
1748         return snd_interval_list(hw_param_interval(params, rule->var),
1749                                  snd_pcm_known_rates.count,
1750                                  snd_pcm_known_rates.list, hw->rates);
1751 }
1752
1753 static int snd_pcm_hw_rule_buffer_bytes_max(struct snd_pcm_hw_params *params,
1754                                             struct snd_pcm_hw_rule *rule)
1755 {
1756         struct snd_interval t;
1757         struct snd_pcm_substream *substream = rule->private;
1758         t.min = 0;
1759         t.max = substream->buffer_bytes_max;
1760         t.openmin = 0;
1761         t.openmax = 0;
1762         t.integer = 1;
1763         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1764 }
1765
1766 int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream)
1767 {
1768         struct snd_pcm_runtime *runtime = substream->runtime;
1769         struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints;
1770         int k, err;
1771
1772         for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
1773                 snd_mask_any(constrs_mask(constrs, k));
1774         }
1775
1776         for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
1777                 snd_interval_any(constrs_interval(constrs, k));
1778         }
1779
1780         snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_CHANNELS));
1781         snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_SIZE));
1782         snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_BYTES));
1783         snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_SAMPLE_BITS));
1784         snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_FRAME_BITS));
1785
1786         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT,
1787                                    snd_pcm_hw_rule_format, NULL,
1788                                    SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1789         if (err < 0)
1790                 return err;
1791         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
1792                                   snd_pcm_hw_rule_sample_bits, NULL,
1793                                   SNDRV_PCM_HW_PARAM_FORMAT,
1794                                   SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1795         if (err < 0)
1796                 return err;
1797         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
1798                                   snd_pcm_hw_rule_div, NULL,
1799                                   SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
1800         if (err < 0)
1801                 return err;
1802         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1803                                   snd_pcm_hw_rule_mul, NULL,
1804                                   SNDRV_PCM_HW_PARAM_SAMPLE_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
1805         if (err < 0)
1806                 return err;
1807         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1808                                   snd_pcm_hw_rule_mulkdiv, (void*) 8,
1809                                   SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
1810         if (err < 0)
1811                 return err;
1812         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1813                                   snd_pcm_hw_rule_mulkdiv, (void*) 8,
1814                                   SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, -1);
1815         if (err < 0)
1816                 return err;
1817         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
1818                                   snd_pcm_hw_rule_div, NULL,
1819                                   SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1820         if (err < 0)
1821                 return err;
1822         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1823                                   snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1824                                   SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_TIME, -1);
1825         if (err < 0)
1826                 return err;
1827         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1828                                   snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1829                                   SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_BUFFER_TIME, -1);
1830         if (err < 0)
1831                 return err;
1832         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIODS,
1833                                   snd_pcm_hw_rule_div, NULL,
1834                                   SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
1835         if (err < 0)
1836                 return err;
1837         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
1838                                   snd_pcm_hw_rule_div, NULL,
1839                                   SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
1840         if (err < 0)
1841                 return err;
1842         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
1843                                   snd_pcm_hw_rule_mulkdiv, (void*) 8,
1844                                   SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1845         if (err < 0)
1846                 return err;
1847         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
1848                                   snd_pcm_hw_rule_muldivk, (void*) 1000000,
1849                                   SNDRV_PCM_HW_PARAM_PERIOD_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
1850         if (err < 0)
1851                 return err;
1852         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
1853                                   snd_pcm_hw_rule_mul, NULL,
1854                                   SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
1855         if (err < 0)
1856                 return err;
1857         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
1858                                   snd_pcm_hw_rule_mulkdiv, (void*) 8,
1859                                   SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1860         if (err < 0)
1861                 return err;
1862         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
1863                                   snd_pcm_hw_rule_muldivk, (void*) 1000000,
1864                                   SNDRV_PCM_HW_PARAM_BUFFER_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
1865         if (err < 0)
1866                 return err;
1867         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
1868                                   snd_pcm_hw_rule_muldivk, (void*) 8,
1869                                   SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1870         if (err < 0)
1871                 return err;
1872         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
1873                                   snd_pcm_hw_rule_muldivk, (void*) 8,
1874                                   SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1875         if (err < 0)
1876                 return err;
1877         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_TIME,
1878                                   snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1879                                   SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
1880         if (err < 0)
1881                 return err;
1882         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_TIME,
1883                                   snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1884                                   SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
1885         if (err < 0)
1886                 return err;
1887         return 0;
1888 }
1889
1890 int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream)
1891 {
1892         struct snd_pcm_runtime *runtime = substream->runtime;
1893         struct snd_pcm_hardware *hw = &runtime->hw;
1894         int err;
1895         unsigned int mask = 0;
1896
1897         if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
1898                 mask |= 1 << SNDRV_PCM_ACCESS_RW_INTERLEAVED;
1899         if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
1900                 mask |= 1 << SNDRV_PCM_ACCESS_RW_NONINTERLEAVED;
1901         if (hw->info & SNDRV_PCM_INFO_MMAP) {
1902                 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
1903                         mask |= 1 << SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
1904                 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
1905                         mask |= 1 << SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED;
1906                 if (hw->info & SNDRV_PCM_INFO_COMPLEX)
1907                         mask |= 1 << SNDRV_PCM_ACCESS_MMAP_COMPLEX;
1908         }
1909         err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_ACCESS, mask);
1910         if (err < 0)
1911                 return err;
1912
1913         err = snd_pcm_hw_constraint_mask64(runtime, SNDRV_PCM_HW_PARAM_FORMAT, hw->formats);
1914         if (err < 0)
1915                 return err;
1916
1917         err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_SUBFORMAT, 1 << SNDRV_PCM_SUBFORMAT_STD);
1918         if (err < 0)
1919                 return err;
1920
1921         err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_CHANNELS,
1922                                            hw->channels_min, hw->channels_max);
1923         if (err < 0)
1924                 return err;
1925
1926         err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_RATE,
1927                                            hw->rate_min, hw->rate_max);
1928         if (err < 0)
1929                 return err;
1930
1931         err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
1932                                            hw->period_bytes_min, hw->period_bytes_max);
1933         if (err < 0)
1934                 return err;
1935
1936         err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIODS,
1937                                            hw->periods_min, hw->periods_max);
1938         if (err < 0)
1939                 return err;
1940
1941         err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
1942                                            hw->period_bytes_min, hw->buffer_bytes_max);
1943         if (err < 0)
1944                 return err;
1945
1946         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
1947                                   snd_pcm_hw_rule_buffer_bytes_max, substream,
1948                                   SNDRV_PCM_HW_PARAM_BUFFER_BYTES, -1);
1949         if (err < 0)
1950                 return err;
1951
1952         /* FIXME: remove */
1953         if (runtime->dma_bytes) {
1954                 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 0, runtime->dma_bytes);
1955                 if (err < 0)
1956                         return -EINVAL;
1957         }
1958
1959         if (!(hw->rates & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))) {
1960                 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1961                                           snd_pcm_hw_rule_rate, hw,
1962                                           SNDRV_PCM_HW_PARAM_RATE, -1);
1963                 if (err < 0)
1964                         return err;
1965         }
1966
1967         /* FIXME: this belong to lowlevel */
1968         snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIOD_SIZE);
1969
1970         return 0;
1971 }
1972
1973 static void pcm_release_private(struct snd_pcm_substream *substream)
1974 {
1975         snd_pcm_unlink(substream);
1976 }
1977
1978 void snd_pcm_release_substream(struct snd_pcm_substream *substream)
1979 {
1980         substream->ref_count--;
1981         if (substream->ref_count > 0)
1982                 return;
1983
1984         snd_pcm_drop(substream);
1985         if (substream->hw_opened) {
1986                 if (substream->ops->hw_free != NULL)
1987                         substream->ops->hw_free(substream);
1988                 substream->ops->close(substream);
1989                 substream->hw_opened = 0;
1990         }
1991         if (substream->pcm_release) {
1992                 substream->pcm_release(substream);
1993                 substream->pcm_release = NULL;
1994         }
1995         snd_pcm_detach_substream(substream);
1996 }
1997
1998 EXPORT_SYMBOL(snd_pcm_release_substream);
1999
2000 int snd_pcm_open_substream(struct snd_pcm *pcm, int stream,
2001                            struct file *file,
2002                            struct snd_pcm_substream **rsubstream)
2003 {
2004         struct snd_pcm_substream *substream;
2005         int err;
2006
2007         err = snd_pcm_attach_substream(pcm, stream, file, &substream);
2008         if (err < 0)
2009                 return err;
2010         if (substream->ref_count > 1) {
2011                 *rsubstream = substream;
2012                 return 0;
2013         }
2014
2015         err = snd_pcm_hw_constraints_init(substream);
2016         if (err < 0) {
2017                 snd_printd("snd_pcm_hw_constraints_init failed\n");
2018                 goto error;
2019         }
2020
2021         if ((err = substream->ops->open(substream)) < 0)
2022                 goto error;
2023
2024         substream->hw_opened = 1;
2025
2026         err = snd_pcm_hw_constraints_complete(substream);
2027         if (err < 0) {
2028                 snd_printd("snd_pcm_hw_constraints_complete failed\n");
2029                 goto error;
2030         }
2031
2032         *rsubstream = substream;
2033         return 0;
2034
2035  error:
2036         snd_pcm_release_substream(substream);
2037         return err;
2038 }
2039
2040 EXPORT_SYMBOL(snd_pcm_open_substream);
2041
2042 static int snd_pcm_open_file(struct file *file,
2043                              struct snd_pcm *pcm,
2044                              int stream,
2045                              struct snd_pcm_file **rpcm_file)
2046 {
2047         struct snd_pcm_file *pcm_file;
2048         struct snd_pcm_substream *substream;
2049         struct snd_pcm_str *str;
2050         int err;
2051
2052         if (rpcm_file)
2053                 *rpcm_file = NULL;
2054
2055         err = snd_pcm_open_substream(pcm, stream, file, &substream);
2056         if (err < 0)
2057                 return err;
2058
2059         pcm_file = kzalloc(sizeof(*pcm_file), GFP_KERNEL);
2060         if (pcm_file == NULL) {
2061                 snd_pcm_release_substream(substream);
2062                 return -ENOMEM;
2063         }
2064         pcm_file->substream = substream;
2065         if (substream->ref_count == 1) {
2066                 str = substream->pstr;
2067                 substream->file = pcm_file;
2068                 substream->pcm_release = pcm_release_private;
2069         }
2070         file->private_data = pcm_file;
2071         if (rpcm_file)
2072                 *rpcm_file = pcm_file;
2073         return 0;
2074 }
2075
2076 static int snd_pcm_playback_open(struct inode *inode, struct file *file)
2077 {
2078         struct snd_pcm *pcm;
2079         int err = nonseekable_open(inode, file);
2080         if (err < 0)
2081                 return err;
2082         pcm = snd_lookup_minor_data(iminor(inode),
2083                                     SNDRV_DEVICE_TYPE_PCM_PLAYBACK);
2084         return snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_PLAYBACK);
2085 }
2086
2087 static int snd_pcm_capture_open(struct inode *inode, struct file *file)
2088 {
2089         struct snd_pcm *pcm;
2090         int err = nonseekable_open(inode, file);
2091         if (err < 0)
2092                 return err;
2093         pcm = snd_lookup_minor_data(iminor(inode),
2094                                     SNDRV_DEVICE_TYPE_PCM_CAPTURE);
2095         return snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_CAPTURE);
2096 }
2097
2098 static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream)
2099 {
2100         int err;
2101         struct snd_pcm_file *pcm_file;
2102         wait_queue_t wait;
2103
2104         if (pcm == NULL) {
2105                 err = -ENODEV;
2106                 goto __error1;
2107         }
2108         err = snd_card_file_add(pcm->card, file);
2109         if (err < 0)
2110                 goto __error1;
2111         if (!try_module_get(pcm->card->module)) {
2112                 err = -EFAULT;
2113                 goto __error2;
2114         }
2115         init_waitqueue_entry(&wait, current);
2116         add_wait_queue(&pcm->open_wait, &wait);
2117         mutex_lock(&pcm->open_mutex);
2118         while (1) {
2119                 err = snd_pcm_open_file(file, pcm, stream, &pcm_file);
2120                 if (err >= 0)
2121                         break;
2122                 if (err == -EAGAIN) {
2123                         if (file->f_flags & O_NONBLOCK) {
2124                                 err = -EBUSY;
2125                                 break;
2126                         }
2127                 } else
2128                         break;
2129                 set_current_state(TASK_INTERRUPTIBLE);
2130                 mutex_unlock(&pcm->open_mutex);
2131                 schedule();
2132                 mutex_lock(&pcm->open_mutex);
2133                 if (signal_pending(current)) {
2134                         err = -ERESTARTSYS;
2135                         break;
2136                 }
2137         }
2138         remove_wait_queue(&pcm->open_wait, &wait);
2139         mutex_unlock(&pcm->open_mutex);
2140         if (err < 0)
2141                 goto __error;
2142         return err;
2143
2144       __error:
2145         module_put(pcm->card->module);
2146       __error2:
2147         snd_card_file_remove(pcm->card, file);
2148       __error1:
2149         return err;
2150 }
2151
2152 static int snd_pcm_release(struct inode *inode, struct file *file)
2153 {
2154         struct snd_pcm *pcm;
2155         struct snd_pcm_substream *substream;
2156         struct snd_pcm_file *pcm_file;
2157
2158         pcm_file = file->private_data;
2159         substream = pcm_file->substream;
2160         if (snd_BUG_ON(!substream))
2161                 return -ENXIO;
2162         pcm = substream->pcm;
2163         mutex_lock(&pcm->open_mutex);
2164         snd_pcm_release_substream(substream);
2165         kfree(pcm_file);
2166         mutex_unlock(&pcm->open_mutex);
2167         wake_up(&pcm->open_wait);
2168         module_put(pcm->card->module);
2169         snd_card_file_remove(pcm->card, file);
2170         return 0;
2171 }
2172
2173 static snd_pcm_sframes_t snd_pcm_playback_rewind(struct snd_pcm_substream *substream,
2174                                                  snd_pcm_uframes_t frames)
2175 {
2176         struct snd_pcm_runtime *runtime = substream->runtime;
2177         snd_pcm_sframes_t appl_ptr;
2178         snd_pcm_sframes_t ret;
2179         snd_pcm_sframes_t hw_avail;
2180
2181         if (frames == 0)
2182                 return 0;
2183
2184         snd_pcm_stream_lock_irq(substream);
2185         switch (runtime->status->state) {
2186         case SNDRV_PCM_STATE_PREPARED:
2187                 break;
2188         case SNDRV_PCM_STATE_DRAINING:
2189         case SNDRV_PCM_STATE_RUNNING:
2190                 if (snd_pcm_update_hw_ptr(substream) >= 0)
2191                         break;
2192                 /* Fall through */
2193         case SNDRV_PCM_STATE_XRUN:
2194                 ret = -EPIPE;
2195                 goto __end;
2196         case SNDRV_PCM_STATE_SUSPENDED:
2197                 ret = -ESTRPIPE;
2198                 goto __end;
2199         default:
2200                 ret = -EBADFD;
2201                 goto __end;
2202         }
2203
2204         hw_avail = snd_pcm_playback_hw_avail(runtime);
2205         if (hw_avail <= 0) {
2206                 ret = 0;
2207                 goto __end;
2208         }
2209         if (frames > (snd_pcm_uframes_t)hw_avail)
2210                 frames = hw_avail;
2211         appl_ptr = runtime->control->appl_ptr - frames;
2212         if (appl_ptr < 0)
2213                 appl_ptr += runtime->boundary;
2214         runtime->control->appl_ptr = appl_ptr;
2215         ret = frames;
2216  __end:
2217         snd_pcm_stream_unlock_irq(substream);
2218         return ret;
2219 }
2220
2221 static snd_pcm_sframes_t snd_pcm_capture_rewind(struct snd_pcm_substream *substream,
2222                                                 snd_pcm_uframes_t frames)
2223 {
2224         struct snd_pcm_runtime *runtime = substream->runtime;
2225         snd_pcm_sframes_t appl_ptr;
2226         snd_pcm_sframes_t ret;
2227         snd_pcm_sframes_t hw_avail;
2228
2229         if (frames == 0)
2230                 return 0;
2231
2232         snd_pcm_stream_lock_irq(substream);
2233         switch (runtime->status->state) {
2234         case SNDRV_PCM_STATE_PREPARED:
2235         case SNDRV_PCM_STATE_DRAINING:
2236                 break;
2237         case SNDRV_PCM_STATE_RUNNING:
2238                 if (snd_pcm_update_hw_ptr(substream) >= 0)
2239                         break;
2240                 /* Fall through */
2241         case SNDRV_PCM_STATE_XRUN:
2242                 ret = -EPIPE;
2243                 goto __end;
2244         case SNDRV_PCM_STATE_SUSPENDED:
2245                 ret = -ESTRPIPE;
2246                 goto __end;
2247         default:
2248                 ret = -EBADFD;
2249                 goto __end;
2250         }
2251
2252         hw_avail = snd_pcm_capture_hw_avail(runtime);
2253         if (hw_avail <= 0) {
2254                 ret = 0;
2255                 goto __end;
2256         }
2257         if (frames > (snd_pcm_uframes_t)hw_avail)
2258                 frames = hw_avail;
2259         appl_ptr = runtime->control->appl_ptr - frames;
2260         if (appl_ptr < 0)
2261                 appl_ptr += runtime->boundary;
2262         runtime->control->appl_ptr = appl_ptr;
2263         ret = frames;
2264  __end:
2265         snd_pcm_stream_unlock_irq(substream);
2266         return ret;
2267 }
2268
2269 static snd_pcm_sframes_t snd_pcm_playback_forward(struct snd_pcm_substream *substream,
2270                                                   snd_pcm_uframes_t frames)
2271 {
2272         struct snd_pcm_runtime *runtime = substream->runtime;
2273         snd_pcm_sframes_t appl_ptr;
2274         snd_pcm_sframes_t ret;
2275         snd_pcm_sframes_t avail;
2276
2277         if (frames == 0)
2278                 return 0;
2279
2280         snd_pcm_stream_lock_irq(substream);
2281         switch (runtime->status->state) {
2282         case SNDRV_PCM_STATE_PREPARED:
2283         case SNDRV_PCM_STATE_PAUSED:
2284                 break;
2285         case SNDRV_PCM_STATE_DRAINING:
2286         case SNDRV_PCM_STATE_RUNNING:
2287                 if (snd_pcm_update_hw_ptr(substream) >= 0)
2288                         break;
2289                 /* Fall through */
2290         case SNDRV_PCM_STATE_XRUN:
2291                 ret = -EPIPE;
2292                 goto __end;
2293         case SNDRV_PCM_STATE_SUSPENDED:
2294                 ret = -ESTRPIPE;
2295                 goto __end;
2296         default:
2297                 ret = -EBADFD;
2298                 goto __end;
2299         }
2300
2301         avail = snd_pcm_playback_avail(runtime);
2302         if (avail <= 0) {
2303                 ret = 0;
2304                 goto __end;
2305         }
2306         if (frames > (snd_pcm_uframes_t)avail)
2307                 frames = avail;
2308         appl_ptr = runtime->control->appl_ptr + frames;
2309         if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary)
2310                 appl_ptr -= runtime->boundary;
2311         runtime->control->appl_ptr = appl_ptr;
2312         ret = frames;
2313  __end:
2314         snd_pcm_stream_unlock_irq(substream);
2315         return ret;
2316 }
2317
2318 static snd_pcm_sframes_t snd_pcm_capture_forward(struct snd_pcm_substream *substream,
2319                                                  snd_pcm_uframes_t frames)
2320 {
2321         struct snd_pcm_runtime *runtime = substream->runtime;
2322         snd_pcm_sframes_t appl_ptr;
2323         snd_pcm_sframes_t ret;
2324         snd_pcm_sframes_t avail;
2325
2326         if (frames == 0)
2327                 return 0;
2328
2329         snd_pcm_stream_lock_irq(substream);
2330         switch (runtime->status->state) {
2331         case SNDRV_PCM_STATE_PREPARED:
2332         case SNDRV_PCM_STATE_DRAINING:
2333         case SNDRV_PCM_STATE_PAUSED:
2334                 break;
2335         case SNDRV_PCM_STATE_RUNNING:
2336                 if (snd_pcm_update_hw_ptr(substream) >= 0)
2337                         break;
2338                 /* Fall through */
2339         case SNDRV_PCM_STATE_XRUN:
2340                 ret = -EPIPE;
2341                 goto __end;
2342         case SNDRV_PCM_STATE_SUSPENDED:
2343                 ret = -ESTRPIPE;
2344                 goto __end;
2345         default:
2346                 ret = -EBADFD;
2347                 goto __end;
2348         }
2349
2350         avail = snd_pcm_capture_avail(runtime);
2351         if (avail <= 0) {
2352                 ret = 0;
2353                 goto __end;
2354         }
2355         if (frames > (snd_pcm_uframes_t)avail)
2356                 frames = avail;
2357         appl_ptr = runtime->control->appl_ptr + frames;
2358         if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary)
2359                 appl_ptr -= runtime->boundary;
2360         runtime->control->appl_ptr = appl_ptr;
2361         ret = frames;
2362  __end:
2363         snd_pcm_stream_unlock_irq(substream);
2364         return ret;
2365 }
2366
2367 static int snd_pcm_hwsync(struct snd_pcm_substream *substream)
2368 {
2369         struct snd_pcm_runtime *runtime = substream->runtime;
2370         int err;
2371
2372         snd_pcm_stream_lock_irq(substream);
2373         switch (runtime->status->state) {
2374         case SNDRV_PCM_STATE_DRAINING:
2375                 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
2376                         goto __badfd;
2377         case SNDRV_PCM_STATE_RUNNING:
2378                 if ((err = snd_pcm_update_hw_ptr(substream)) < 0)
2379                         break;
2380                 /* Fall through */
2381         case SNDRV_PCM_STATE_PREPARED:
2382         case SNDRV_PCM_STATE_SUSPENDED:
2383                 err = 0;
2384                 break;
2385         case SNDRV_PCM_STATE_XRUN:
2386                 err = -EPIPE;
2387                 break;
2388         default:
2389               __badfd:
2390                 err = -EBADFD;
2391                 break;
2392         }
2393         snd_pcm_stream_unlock_irq(substream);
2394         return err;
2395 }
2396
2397 static int snd_pcm_delay(struct snd_pcm_substream *substream,
2398                          snd_pcm_sframes_t __user *res)
2399 {
2400         struct snd_pcm_runtime *runtime = substream->runtime;
2401         int err;
2402         snd_pcm_sframes_t n = 0;
2403
2404         snd_pcm_stream_lock_irq(substream);
2405         switch (runtime->status->state) {
2406         case SNDRV_PCM_STATE_DRAINING:
2407                 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
2408                         goto __badfd;
2409         case SNDRV_PCM_STATE_RUNNING:
2410                 if ((err = snd_pcm_update_hw_ptr(substream)) < 0)
2411                         break;
2412                 /* Fall through */
2413         case SNDRV_PCM_STATE_PREPARED:
2414         case SNDRV_PCM_STATE_SUSPENDED:
2415                 err = 0;
2416                 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
2417                         n = snd_pcm_playback_hw_avail(runtime);
2418                 else
2419                         n = snd_pcm_capture_avail(runtime);
2420                 n += runtime->delay;
2421                 break;
2422         case SNDRV_PCM_STATE_XRUN:
2423                 err = -EPIPE;
2424                 break;
2425         default:
2426               __badfd:
2427                 err = -EBADFD;
2428                 break;
2429         }
2430         snd_pcm_stream_unlock_irq(substream);
2431         if (!err)
2432                 if (put_user(n, res))
2433                         err = -EFAULT;
2434         return err;
2435 }
2436
2437 static int snd_pcm_sync_ptr(struct snd_pcm_substream *substream,
2438                             struct snd_pcm_sync_ptr __user *_sync_ptr)
2439 {
2440         struct snd_pcm_runtime *runtime = substream->runtime;
2441         struct snd_pcm_sync_ptr sync_ptr;
2442         volatile struct snd_pcm_mmap_status *status;
2443         volatile struct snd_pcm_mmap_control *control;
2444         int err;
2445
2446         memset(&sync_ptr, 0, sizeof(sync_ptr));
2447         if (get_user(sync_ptr.flags, (unsigned __user *)&(_sync_ptr->flags)))
2448                 return -EFAULT;
2449         if (copy_from_user(&sync_ptr.c.control, &(_sync_ptr->c.control), sizeof(struct snd_pcm_mmap_control)))
2450                 return -EFAULT;
2451         status = runtime->status;
2452         control = runtime->control;
2453         if (sync_ptr.flags & SNDRV_PCM_SYNC_PTR_HWSYNC) {
2454                 err = snd_pcm_hwsync(substream);
2455                 if (err < 0)
2456                         return err;
2457         }
2458         snd_pcm_stream_lock_irq(substream);
2459         if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_APPL))
2460                 control->appl_ptr = sync_ptr.c.control.appl_ptr;
2461         else
2462                 sync_ptr.c.control.appl_ptr = control->appl_ptr;
2463         if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN))
2464                 control->avail_min = sync_ptr.c.control.avail_min;
2465         else
2466                 sync_ptr.c.control.avail_min = control->avail_min;
2467         sync_ptr.s.status.state = status->state;
2468         sync_ptr.s.status.hw_ptr = status->hw_ptr;
2469         sync_ptr.s.status.tstamp = status->tstamp;
2470         sync_ptr.s.status.suspended_state = status->suspended_state;
2471         snd_pcm_stream_unlock_irq(substream);
2472         if (copy_to_user(_sync_ptr, &sync_ptr, sizeof(sync_ptr)))
2473                 return -EFAULT;
2474         return 0;
2475 }
2476
2477 static int snd_pcm_tstamp(struct snd_pcm_substream *substream, int __user *_arg)
2478 {
2479         struct snd_pcm_runtime *runtime = substream->runtime;
2480         int arg;
2481
2482         if (get_user(arg, _arg))
2483                 return -EFAULT;
2484         if (arg < 0 || arg > SNDRV_PCM_TSTAMP_TYPE_LAST)
2485                 return -EINVAL;
2486         runtime->tstamp_type = SNDRV_PCM_TSTAMP_TYPE_GETTIMEOFDAY;
2487         if (arg == SNDRV_PCM_TSTAMP_TYPE_MONOTONIC)
2488                 runtime->tstamp_type = SNDRV_PCM_TSTAMP_TYPE_MONOTONIC;
2489         return 0;
2490 }
2491
2492 static int snd_pcm_common_ioctl1(struct file *file,
2493                                  struct snd_pcm_substream *substream,
2494                                  unsigned int cmd, void __user *arg)
2495 {
2496         switch (cmd) {
2497         case SNDRV_PCM_IOCTL_PVERSION:
2498                 return put_user(SNDRV_PCM_VERSION, (int __user *)arg) ? -EFAULT : 0;
2499         case SNDRV_PCM_IOCTL_INFO:
2500                 return snd_pcm_info_user(substream, arg);
2501         case SNDRV_PCM_IOCTL_TSTAMP:    /* just for compatibility */
2502                 return 0;
2503         case SNDRV_PCM_IOCTL_TTSTAMP:
2504                 return snd_pcm_tstamp(substream, arg);
2505         case SNDRV_PCM_IOCTL_HW_REFINE:
2506                 return snd_pcm_hw_refine_user(substream, arg);
2507         case SNDRV_PCM_IOCTL_HW_PARAMS:
2508                 return snd_pcm_hw_params_user(substream, arg);
2509         case SNDRV_PCM_IOCTL_HW_FREE:
2510                 return snd_pcm_hw_free(substream);
2511         case SNDRV_PCM_IOCTL_SW_PARAMS:
2512                 return snd_pcm_sw_params_user(substream, arg);
2513         case SNDRV_PCM_IOCTL_STATUS:
2514                 return snd_pcm_status_user(substream, arg);
2515         case SNDRV_PCM_IOCTL_CHANNEL_INFO:
2516                 return snd_pcm_channel_info_user(substream, arg);
2517         case SNDRV_PCM_IOCTL_PREPARE:
2518                 return snd_pcm_prepare(substream, file);
2519         case SNDRV_PCM_IOCTL_RESET:
2520                 return snd_pcm_reset(substream);
2521         case SNDRV_PCM_IOCTL_START:
2522                 return snd_pcm_action_lock_irq(&snd_pcm_action_start, substream, SNDRV_PCM_STATE_RUNNING);
2523         case SNDRV_PCM_IOCTL_LINK:
2524                 return snd_pcm_link(substream, (int)(unsigned long) arg);
2525         case SNDRV_PCM_IOCTL_UNLINK:
2526                 return snd_pcm_unlink(substream);
2527         case SNDRV_PCM_IOCTL_RESUME:
2528                 return snd_pcm_resume(substream);
2529         case SNDRV_PCM_IOCTL_XRUN:
2530                 return snd_pcm_xrun(substream);
2531         case SNDRV_PCM_IOCTL_HWSYNC:
2532                 return snd_pcm_hwsync(substream);
2533         case SNDRV_PCM_IOCTL_DELAY:
2534                 return snd_pcm_delay(substream, arg);
2535         case SNDRV_PCM_IOCTL_SYNC_PTR:
2536                 return snd_pcm_sync_ptr(substream, arg);
2537 #ifdef CONFIG_SND_SUPPORT_OLD_API
2538         case SNDRV_PCM_IOCTL_HW_REFINE_OLD:
2539                 return snd_pcm_hw_refine_old_user(substream, arg);
2540         case SNDRV_PCM_IOCTL_HW_PARAMS_OLD:
2541                 return snd_pcm_hw_params_old_user(substream, arg);
2542 #endif
2543         case SNDRV_PCM_IOCTL_DRAIN:
2544                 return snd_pcm_drain(substream, file);
2545         case SNDRV_PCM_IOCTL_DROP:
2546                 return snd_pcm_drop(substream);
2547         case SNDRV_PCM_IOCTL_PAUSE:
2548         {
2549                 int res;
2550                 snd_pcm_stream_lock_irq(substream);
2551                 res = snd_pcm_pause(substream, (int)(unsigned long)arg);
2552                 snd_pcm_stream_unlock_irq(substream);
2553                 return res;
2554         }
2555         }
2556         snd_printd("unknown ioctl = 0x%x\n", cmd);
2557         return -ENOTTY;
2558 }
2559
2560 static int snd_pcm_playback_ioctl1(struct file *file,
2561                                    struct snd_pcm_substream *substream,
2562                                    unsigned int cmd, void __user *arg)
2563 {
2564         if (snd_BUG_ON(!substream))
2565                 return -ENXIO;
2566         if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_PLAYBACK))
2567                 return -EINVAL;
2568         switch (cmd) {
2569         case SNDRV_PCM_IOCTL_WRITEI_FRAMES:
2570         {
2571                 struct snd_xferi xferi;
2572                 struct snd_xferi __user *_xferi = arg;
2573                 struct snd_pcm_runtime *runtime = substream->runtime;
2574                 snd_pcm_sframes_t result;
2575                 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2576                         return -EBADFD;
2577                 if (put_user(0, &_xferi->result))
2578                         return -EFAULT;
2579                 if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
2580                         return -EFAULT;
2581                 result = snd_pcm_lib_write(substream, xferi.buf, xferi.frames);
2582                 __put_user(result, &_xferi->result);
2583                 return result < 0 ? result : 0;
2584         }
2585         case SNDRV_PCM_IOCTL_WRITEN_FRAMES:
2586         {
2587                 struct snd_xfern xfern;
2588                 struct snd_xfern __user *_xfern = arg;
2589                 struct snd_pcm_runtime *runtime = substream->runtime;
2590                 void __user **bufs;
2591                 snd_pcm_sframes_t result;
2592                 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2593                         return -EBADFD;
2594                 if (runtime->channels > 128)
2595                         return -EINVAL;
2596                 if (put_user(0, &_xfern->result))
2597                         return -EFAULT;
2598                 if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
2599                         return -EFAULT;
2600
2601                 bufs = memdup_user(xfern.bufs,
2602                                    sizeof(void *) * runtime->channels);
2603                 if (IS_ERR(bufs))
2604                         return PTR_ERR(bufs);
2605                 result = snd_pcm_lib_writev(substream, bufs, xfern.frames);
2606                 kfree(bufs);
2607                 __put_user(result, &_xfern->result);
2608                 return result < 0 ? result : 0;
2609         }
2610         case SNDRV_PCM_IOCTL_REWIND:
2611         {
2612                 snd_pcm_uframes_t frames;
2613                 snd_pcm_uframes_t __user *_frames = arg;
2614                 snd_pcm_sframes_t result;
2615                 if (get_user(frames, _frames))
2616                         return -EFAULT;
2617                 if (put_user(0, _frames))
2618                         return -EFAULT;
2619                 result = snd_pcm_playback_rewind(substream, frames);
2620                 __put_user(result, _frames);
2621                 return result < 0 ? result : 0;
2622         }
2623         case SNDRV_PCM_IOCTL_FORWARD:
2624         {
2625                 snd_pcm_uframes_t frames;
2626                 snd_pcm_uframes_t __user *_frames = arg;
2627                 snd_pcm_sframes_t result;
2628                 if (get_user(frames, _frames))
2629                         return -EFAULT;
2630                 if (put_user(0, _frames))
2631                         return -EFAULT;
2632                 result = snd_pcm_playback_forward(substream, frames);
2633                 __put_user(result, _frames);
2634                 return result < 0 ? result : 0;
2635         }
2636         }
2637         return snd_pcm_common_ioctl1(file, substream, cmd, arg);
2638 }
2639
2640 static int snd_pcm_capture_ioctl1(struct file *file,
2641                                   struct snd_pcm_substream *substream,
2642                                   unsigned int cmd, void __user *arg)
2643 {
2644         if (snd_BUG_ON(!substream))
2645                 return -ENXIO;
2646         if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_CAPTURE))
2647                 return -EINVAL;
2648         switch (cmd) {
2649         case SNDRV_PCM_IOCTL_READI_FRAMES:
2650         {
2651                 struct snd_xferi xferi;
2652                 struct snd_xferi __user *_xferi = arg;
2653                 struct snd_pcm_runtime *runtime = substream->runtime;
2654                 snd_pcm_sframes_t result;
2655                 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2656                         return -EBADFD;
2657                 if (put_user(0, &_xferi->result))
2658                         return -EFAULT;
2659                 if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
2660                         return -EFAULT;
2661                 result = snd_pcm_lib_read(substream, xferi.buf, xferi.frames);
2662                 __put_user(result, &_xferi->result);
2663                 return result < 0 ? result : 0;
2664         }
2665         case SNDRV_PCM_IOCTL_READN_FRAMES:
2666         {
2667                 struct snd_xfern xfern;
2668                 struct snd_xfern __user *_xfern = arg;
2669                 struct snd_pcm_runtime *runtime = substream->runtime;
2670                 void *bufs;
2671                 snd_pcm_sframes_t result;
2672                 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2673                         return -EBADFD;
2674                 if (runtime->channels > 128)
2675                         return -EINVAL;
2676                 if (put_user(0, &_xfern->result))
2677                         return -EFAULT;
2678                 if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
2679                         return -EFAULT;
2680
2681                 bufs = memdup_user(xfern.bufs,
2682                                    sizeof(void *) * runtime->channels);
2683                 if (IS_ERR(bufs))
2684                         return PTR_ERR(bufs);
2685                 result = snd_pcm_lib_readv(substream, bufs, xfern.frames);
2686                 kfree(bufs);
2687                 __put_user(result, &_xfern->result);
2688                 return result < 0 ? result : 0;
2689         }
2690         case SNDRV_PCM_IOCTL_REWIND:
2691         {
2692                 snd_pcm_uframes_t frames;
2693                 snd_pcm_uframes_t __user *_frames = arg;
2694                 snd_pcm_sframes_t result;
2695                 if (get_user(frames, _frames))
2696                         return -EFAULT;
2697                 if (put_user(0, _frames))
2698                         return -EFAULT;
2699                 result = snd_pcm_capture_rewind(substream, frames);
2700                 __put_user(result, _frames);
2701                 return result < 0 ? result : 0;
2702         }
2703         case SNDRV_PCM_IOCTL_FORWARD:
2704         {
2705                 snd_pcm_uframes_t frames;
2706                 snd_pcm_uframes_t __user *_frames = arg;
2707                 snd_pcm_sframes_t result;
2708                 if (get_user(frames, _frames))
2709                         return -EFAULT;
2710                 if (put_user(0, _frames))
2711                         return -EFAULT;
2712                 result = snd_pcm_capture_forward(substream, frames);
2713                 __put_user(result, _frames);
2714                 return result < 0 ? result : 0;
2715         }
2716         }
2717         return snd_pcm_common_ioctl1(file, substream, cmd, arg);
2718 }
2719
2720 static long snd_pcm_playback_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_playback_ioctl1(file, pcm_file->substream, cmd,
2731                                        (void __user *)arg);
2732 }
2733
2734 static long snd_pcm_capture_ioctl(struct file *file, unsigned int cmd,
2735                                   unsigned long arg)
2736 {
2737         struct snd_pcm_file *pcm_file;
2738
2739         pcm_file = file->private_data;
2740
2741         if (((cmd >> 8) & 0xff) != 'A')
2742                 return -ENOTTY;
2743
2744         return snd_pcm_capture_ioctl1(file, pcm_file->substream, cmd,
2745                                       (void __user *)arg);
2746 }
2747
2748 int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream,
2749                          unsigned int cmd, void *arg)
2750 {
2751         mm_segment_t fs;
2752         int result;
2753
2754         fs = snd_enter_user();
2755         switch (substream->stream) {
2756         case SNDRV_PCM_STREAM_PLAYBACK:
2757                 result = snd_pcm_playback_ioctl1(NULL, substream, cmd,
2758                                                  (void __user *)arg);
2759                 break;
2760         case SNDRV_PCM_STREAM_CAPTURE:
2761                 result = snd_pcm_capture_ioctl1(NULL, substream, cmd,
2762                                                 (void __user *)arg);
2763                 break;
2764         default:
2765                 result = -EINVAL;
2766                 break;
2767         }
2768         snd_leave_user(fs);
2769         return result;
2770 }
2771
2772 EXPORT_SYMBOL(snd_pcm_kernel_ioctl);
2773
2774 static ssize_t snd_pcm_read(struct file *file, char __user *buf, size_t count,
2775                             loff_t * offset)
2776 {
2777         struct snd_pcm_file *pcm_file;
2778         struct snd_pcm_substream *substream;
2779         struct snd_pcm_runtime *runtime;
2780         snd_pcm_sframes_t result;
2781
2782         pcm_file = file->private_data;
2783         substream = pcm_file->substream;
2784         if (PCM_RUNTIME_CHECK(substream))
2785                 return -ENXIO;
2786         runtime = substream->runtime;
2787         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2788                 return -EBADFD;
2789         if (!frame_aligned(runtime, count))
2790                 return -EINVAL;
2791         count = bytes_to_frames(runtime, count);
2792         result = snd_pcm_lib_read(substream, buf, count);
2793         if (result > 0)
2794                 result = frames_to_bytes(runtime, result);
2795         return result;
2796 }
2797
2798 static ssize_t snd_pcm_write(struct file *file, const char __user *buf,
2799                              size_t count, loff_t * offset)
2800 {
2801         struct snd_pcm_file *pcm_file;
2802         struct snd_pcm_substream *substream;
2803         struct snd_pcm_runtime *runtime;
2804         snd_pcm_sframes_t result;
2805
2806         pcm_file = file->private_data;
2807         substream = pcm_file->substream;
2808         if (PCM_RUNTIME_CHECK(substream))
2809                 return -ENXIO;
2810         runtime = substream->runtime;
2811         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2812                 return -EBADFD;
2813         if (!frame_aligned(runtime, count))
2814                 return -EINVAL;
2815         count = bytes_to_frames(runtime, count);
2816         result = snd_pcm_lib_write(substream, buf, count);
2817         if (result > 0)
2818                 result = frames_to_bytes(runtime, result);
2819         return result;
2820 }
2821
2822 static ssize_t snd_pcm_aio_read(struct kiocb *iocb, const struct iovec *iov,
2823                              unsigned long nr_segs, loff_t pos)
2824
2825 {
2826         struct snd_pcm_file *pcm_file;
2827         struct snd_pcm_substream *substream;
2828         struct snd_pcm_runtime *runtime;
2829         snd_pcm_sframes_t result;
2830         unsigned long i;
2831         void __user **bufs;
2832         snd_pcm_uframes_t frames;
2833
2834         pcm_file = iocb->ki_filp->private_data;
2835         substream = pcm_file->substream;
2836         if (PCM_RUNTIME_CHECK(substream))
2837                 return -ENXIO;
2838         runtime = substream->runtime;
2839         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2840                 return -EBADFD;
2841         if (nr_segs > 1024 || nr_segs != runtime->channels)
2842                 return -EINVAL;
2843         if (!frame_aligned(runtime, iov->iov_len))
2844                 return -EINVAL;
2845         frames = bytes_to_samples(runtime, iov->iov_len);
2846         bufs = kmalloc(sizeof(void *) * nr_segs, GFP_KERNEL);
2847         if (bufs == NULL)
2848                 return -ENOMEM;
2849         for (i = 0; i < nr_segs; ++i)
2850                 bufs[i] = iov[i].iov_base;
2851         result = snd_pcm_lib_readv(substream, bufs, frames);
2852         if (result > 0)
2853                 result = frames_to_bytes(runtime, result);
2854         kfree(bufs);
2855         return result;
2856 }
2857
2858 static ssize_t snd_pcm_aio_write(struct kiocb *iocb, const struct iovec *iov,
2859                               unsigned long nr_segs, loff_t pos)
2860 {
2861         struct snd_pcm_file *pcm_file;
2862         struct snd_pcm_substream *substream;
2863         struct snd_pcm_runtime *runtime;
2864         snd_pcm_sframes_t result;
2865         unsigned long i;
2866         void __user **bufs;
2867         snd_pcm_uframes_t frames;
2868
2869         pcm_file = iocb->ki_filp->private_data;
2870         substream = pcm_file->substream;
2871         if (PCM_RUNTIME_CHECK(substream))
2872                 return -ENXIO;
2873         runtime = substream->runtime;
2874         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2875                 return -EBADFD;
2876         if (nr_segs > 128 || nr_segs != runtime->channels ||
2877             !frame_aligned(runtime, iov->iov_len))
2878                 return -EINVAL;
2879         frames = bytes_to_samples(runtime, iov->iov_len);
2880         bufs = kmalloc(sizeof(void *) * nr_segs, GFP_KERNEL);
2881         if (bufs == NULL)
2882                 return -ENOMEM;
2883         for (i = 0; i < nr_segs; ++i)
2884                 bufs[i] = iov[i].iov_base;
2885         result = snd_pcm_lib_writev(substream, bufs, frames);
2886         if (result > 0)
2887                 result = frames_to_bytes(runtime, result);
2888         kfree(bufs);
2889         return result;
2890 }
2891
2892 static unsigned int snd_pcm_playback_poll(struct file *file, poll_table * wait)
2893 {
2894         struct snd_pcm_file *pcm_file;
2895         struct snd_pcm_substream *substream;
2896         struct snd_pcm_runtime *runtime;
2897         unsigned int mask;
2898         snd_pcm_uframes_t avail;
2899
2900         pcm_file = file->private_data;
2901
2902         substream = pcm_file->substream;
2903         if (PCM_RUNTIME_CHECK(substream))
2904                 return -ENXIO;
2905         runtime = substream->runtime;
2906
2907         poll_wait(file, &runtime->sleep, wait);
2908
2909         snd_pcm_stream_lock_irq(substream);
2910         avail = snd_pcm_playback_avail(runtime);
2911         switch (runtime->status->state) {
2912         case SNDRV_PCM_STATE_RUNNING:
2913         case SNDRV_PCM_STATE_PREPARED:
2914         case SNDRV_PCM_STATE_PAUSED:
2915                 if (avail >= runtime->control->avail_min) {
2916                         mask = POLLOUT | POLLWRNORM;
2917                         break;
2918                 }
2919                 /* Fall through */
2920         case SNDRV_PCM_STATE_DRAINING:
2921                 mask = 0;
2922                 break;
2923         default:
2924                 mask = POLLOUT | POLLWRNORM | POLLERR;
2925                 break;
2926         }
2927         snd_pcm_stream_unlock_irq(substream);
2928         return mask;
2929 }
2930
2931 static unsigned int snd_pcm_capture_poll(struct file *file, poll_table * wait)
2932 {
2933         struct snd_pcm_file *pcm_file;
2934         struct snd_pcm_substream *substream;
2935         struct snd_pcm_runtime *runtime;
2936         unsigned int mask;
2937         snd_pcm_uframes_t avail;
2938
2939         pcm_file = file->private_data;
2940
2941         substream = pcm_file->substream;
2942         if (PCM_RUNTIME_CHECK(substream))
2943                 return -ENXIO;
2944         runtime = substream->runtime;
2945
2946         poll_wait(file, &runtime->sleep, wait);
2947
2948         snd_pcm_stream_lock_irq(substream);
2949         avail = snd_pcm_capture_avail(runtime);
2950         switch (runtime->status->state) {
2951         case SNDRV_PCM_STATE_RUNNING:
2952         case SNDRV_PCM_STATE_PREPARED:
2953         case SNDRV_PCM_STATE_PAUSED:
2954                 if (avail >= runtime->control->avail_min) {
2955                         mask = POLLIN | POLLRDNORM;
2956                         break;
2957                 }
2958                 mask = 0;
2959                 break;
2960         case SNDRV_PCM_STATE_DRAINING:
2961                 if (avail > 0) {
2962                         mask = POLLIN | POLLRDNORM;
2963                         break;
2964                 }
2965                 /* Fall through */
2966         default:
2967                 mask = POLLIN | POLLRDNORM | POLLERR;
2968                 break;
2969         }
2970         snd_pcm_stream_unlock_irq(substream);
2971         return mask;
2972 }
2973
2974 /*
2975  * mmap support
2976  */
2977
2978 /*
2979  * Only on coherent architectures, we can mmap the status and the control records
2980  * for effcient data transfer.  On others, we have to use HWSYNC ioctl...
2981  */
2982 #if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA)
2983 /*
2984  * mmap status record
2985  */
2986 static int snd_pcm_mmap_status_fault(struct vm_area_struct *area,
2987                                                 struct vm_fault *vmf)
2988 {
2989         struct snd_pcm_substream *substream = area->vm_private_data;
2990         struct snd_pcm_runtime *runtime;
2991
2992         if (substream == NULL)
2993                 return VM_FAULT_SIGBUS;
2994         runtime = substream->runtime;
2995         vmf->page = virt_to_page(runtime->status);
2996         get_page(vmf->page);
2997         return 0;
2998 }
2999
3000 static const struct vm_operations_struct snd_pcm_vm_ops_status =
3001 {
3002         .fault =        snd_pcm_mmap_status_fault,
3003 };
3004
3005 static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
3006                                struct vm_area_struct *area)
3007 {
3008         struct snd_pcm_runtime *runtime;
3009         long size;
3010         if (!(area->vm_flags & VM_READ))
3011                 return -EINVAL;
3012         runtime = substream->runtime;
3013         size = area->vm_end - area->vm_start;
3014         if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status)))
3015                 return -EINVAL;
3016         area->vm_ops = &snd_pcm_vm_ops_status;
3017         area->vm_private_data = substream;
3018         area->vm_flags |= VM_RESERVED;
3019         return 0;
3020 }
3021
3022 /*
3023  * mmap control record
3024  */
3025 static int snd_pcm_mmap_control_fault(struct vm_area_struct *area,
3026                                                 struct vm_fault *vmf)
3027 {
3028         struct snd_pcm_substream *substream = area->vm_private_data;
3029         struct snd_pcm_runtime *runtime;
3030
3031         if (substream == NULL)
3032                 return VM_FAULT_SIGBUS;
3033         runtime = substream->runtime;
3034         vmf->page = virt_to_page(runtime->control);
3035         get_page(vmf->page);
3036         return 0;
3037 }
3038
3039 static const struct vm_operations_struct snd_pcm_vm_ops_control =
3040 {
3041         .fault =        snd_pcm_mmap_control_fault,
3042 };
3043
3044 static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
3045                                 struct vm_area_struct *area)
3046 {
3047         struct snd_pcm_runtime *runtime;
3048         long size;
3049         if (!(area->vm_flags & VM_READ))
3050                 return -EINVAL;
3051         runtime = substream->runtime;
3052         size = area->vm_end - area->vm_start;
3053         if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control)))
3054                 return -EINVAL;
3055         area->vm_ops = &snd_pcm_vm_ops_control;
3056         area->vm_private_data = substream;
3057         area->vm_flags |= VM_RESERVED;
3058         return 0;
3059 }
3060 #else /* ! coherent mmap */
3061 /*
3062  * don't support mmap for status and control records.
3063  */
3064 static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
3065                                struct vm_area_struct *area)
3066 {
3067         return -ENXIO;
3068 }
3069 static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
3070                                 struct vm_area_struct *area)
3071 {
3072         return -ENXIO;
3073 }
3074 #endif /* coherent mmap */
3075
3076 static inline struct page *
3077 snd_pcm_default_page_ops(struct snd_pcm_substream *substream, unsigned long ofs)
3078 {
3079         void *vaddr = substream->runtime->dma_area + ofs;
3080 #if defined(CONFIG_MIPS) && defined(CONFIG_DMA_NONCOHERENT)
3081         if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV)
3082                 return virt_to_page(CAC_ADDR(vaddr));
3083 #endif
3084 #if defined(CONFIG_PPC32) && defined(CONFIG_NOT_COHERENT_CACHE)
3085         if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV) {
3086                 dma_addr_t addr = substream->runtime->dma_addr + ofs;
3087                 addr -= get_dma_offset(substream->dma_buffer.dev.dev);
3088                 /* assume dma_handle set via pfn_to_phys() in
3089                  * mm/dma-noncoherent.c
3090                  */
3091                 return pfn_to_page(addr >> PAGE_SHIFT);
3092         }
3093 #endif
3094         return virt_to_page(vaddr);
3095 }
3096
3097 /*
3098  * fault callback for mmapping a RAM page
3099  */
3100 static int snd_pcm_mmap_data_fault(struct vm_area_struct *area,
3101                                                 struct vm_fault *vmf)
3102 {
3103         struct snd_pcm_substream *substream = area->vm_private_data;
3104         struct snd_pcm_runtime *runtime;
3105         unsigned long offset;
3106         struct page * page;
3107         size_t dma_bytes;
3108
3109         if (substream == NULL)
3110                 return VM_FAULT_SIGBUS;
3111         runtime = substream->runtime;
3112         offset = vmf->pgoff << PAGE_SHIFT;
3113         dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3114         if (offset > dma_bytes - PAGE_SIZE)
3115                 return VM_FAULT_SIGBUS;
3116         if (substream->ops->page)
3117                 page = substream->ops->page(substream, offset);
3118         else
3119                 page = snd_pcm_default_page_ops(substream, offset);
3120         if (!page)
3121                 return VM_FAULT_SIGBUS;
3122         get_page(page);
3123         vmf->page = page;
3124         return 0;
3125 }
3126
3127 static const struct vm_operations_struct snd_pcm_vm_ops_data = {
3128         .open =         snd_pcm_mmap_data_open,
3129         .close =        snd_pcm_mmap_data_close,
3130 };
3131
3132 static const struct vm_operations_struct snd_pcm_vm_ops_data_fault = {
3133         .open =         snd_pcm_mmap_data_open,
3134         .close =        snd_pcm_mmap_data_close,
3135         .fault =        snd_pcm_mmap_data_fault,
3136 };
3137
3138 #ifndef ARCH_HAS_DMA_MMAP_COHERENT
3139 /* This should be defined / handled globally! */
3140 #ifdef CONFIG_ARM
3141 #define ARCH_HAS_DMA_MMAP_COHERENT
3142 #endif
3143 #endif
3144
3145 /*
3146  * mmap the DMA buffer on RAM
3147  */
3148 static int snd_pcm_default_mmap(struct snd_pcm_substream *substream,
3149                                 struct vm_area_struct *area)
3150 {
3151         area->vm_flags |= VM_RESERVED;
3152 #ifdef ARCH_HAS_DMA_MMAP_COHERENT
3153         if (!substream->ops->page &&
3154             substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV)
3155                 return dma_mmap_coherent(substream->dma_buffer.dev.dev,
3156                                          area,
3157                                          substream->runtime->dma_area,
3158                                          substream->runtime->dma_addr,
3159                                          area->vm_end - area->vm_start);
3160 #elif defined(CONFIG_MIPS) && defined(CONFIG_DMA_NONCOHERENT)
3161         if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV &&
3162             !plat_device_is_coherent(substream->dma_buffer.dev.dev))
3163                 area->vm_page_prot = pgprot_noncached(area->vm_page_prot);
3164 #endif /* ARCH_HAS_DMA_MMAP_COHERENT */
3165         /* mmap with fault handler */
3166         area->vm_ops = &snd_pcm_vm_ops_data_fault;
3167         return 0;
3168 }
3169
3170 /*
3171  * mmap the DMA buffer on I/O memory area
3172  */
3173 #if SNDRV_PCM_INFO_MMAP_IOMEM
3174 int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream,
3175                            struct vm_area_struct *area)
3176 {
3177         long size;
3178         unsigned long offset;
3179
3180         area->vm_page_prot = pgprot_noncached(area->vm_page_prot);
3181         area->vm_flags |= VM_IO;
3182         size = area->vm_end - area->vm_start;
3183         offset = area->vm_pgoff << PAGE_SHIFT;
3184         if (io_remap_pfn_range(area, area->vm_start,
3185                                 (substream->runtime->dma_addr + offset) >> PAGE_SHIFT,
3186                                 size, area->vm_page_prot))
3187                 return -EAGAIN;
3188         return 0;
3189 }
3190
3191 EXPORT_SYMBOL(snd_pcm_lib_mmap_iomem);
3192 #endif /* SNDRV_PCM_INFO_MMAP */
3193
3194 /* mmap callback with pgprot_noncached */
3195 int snd_pcm_lib_mmap_noncached(struct snd_pcm_substream *substream,
3196                                struct vm_area_struct *area)
3197 {
3198         area->vm_page_prot = pgprot_noncached(area->vm_page_prot);
3199         return snd_pcm_default_mmap(substream, area);
3200 }
3201 EXPORT_SYMBOL(snd_pcm_lib_mmap_noncached);
3202
3203 /*
3204  * mmap DMA buffer
3205  */
3206 int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file,
3207                       struct vm_area_struct *area)
3208 {
3209         struct snd_pcm_runtime *runtime;
3210         long size;
3211         unsigned long offset;
3212         size_t dma_bytes;
3213         int err;
3214
3215         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
3216                 if (!(area->vm_flags & (VM_WRITE|VM_READ)))
3217                         return -EINVAL;
3218         } else {
3219                 if (!(area->vm_flags & VM_READ))
3220                         return -EINVAL;
3221         }
3222         runtime = substream->runtime;
3223         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3224                 return -EBADFD;
3225         if (!(runtime->info & SNDRV_PCM_INFO_MMAP))
3226                 return -ENXIO;
3227         if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED ||
3228             runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED)
3229                 return -EINVAL;
3230         size = area->vm_end - area->vm_start;
3231         offset = area->vm_pgoff << PAGE_SHIFT;
3232         dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3233         if ((size_t)size > dma_bytes)
3234                 return -EINVAL;
3235         if (offset > dma_bytes - size)
3236                 return -EINVAL;
3237
3238         area->vm_ops = &snd_pcm_vm_ops_data;
3239         area->vm_private_data = substream;
3240         if (substream->ops->mmap)
3241                 err = substream->ops->mmap(substream, area);
3242         else
3243                 err = snd_pcm_default_mmap(substream, area);
3244         if (!err)
3245                 atomic_inc(&substream->mmap_count);
3246         return err;
3247 }
3248
3249 EXPORT_SYMBOL(snd_pcm_mmap_data);
3250
3251 static int snd_pcm_mmap(struct file *file, struct vm_area_struct *area)
3252 {
3253         struct snd_pcm_file * pcm_file;
3254         struct snd_pcm_substream *substream;
3255         unsigned long offset;
3256
3257         pcm_file = file->private_data;
3258         substream = pcm_file->substream;
3259         if (PCM_RUNTIME_CHECK(substream))
3260                 return -ENXIO;
3261
3262         offset = area->vm_pgoff << PAGE_SHIFT;
3263         switch (offset) {
3264         case SNDRV_PCM_MMAP_OFFSET_STATUS:
3265                 if (pcm_file->no_compat_mmap)
3266                         return -ENXIO;
3267                 return snd_pcm_mmap_status(substream, file, area);
3268         case SNDRV_PCM_MMAP_OFFSET_CONTROL:
3269                 if (pcm_file->no_compat_mmap)
3270                         return -ENXIO;
3271                 return snd_pcm_mmap_control(substream, file, area);
3272         default:
3273                 return snd_pcm_mmap_data(substream, file, area);
3274         }
3275         return 0;
3276 }
3277
3278 static int snd_pcm_fasync(int fd, struct file * file, int on)
3279 {
3280         struct snd_pcm_file * pcm_file;
3281         struct snd_pcm_substream *substream;
3282         struct snd_pcm_runtime *runtime;
3283
3284         pcm_file = file->private_data;
3285         substream = pcm_file->substream;
3286         if (PCM_RUNTIME_CHECK(substream))
3287                 return -ENXIO;
3288         runtime = substream->runtime;
3289         return fasync_helper(fd, file, on, &runtime->fasync);
3290 }
3291
3292 /*
3293  * ioctl32 compat
3294  */
3295 #ifdef CONFIG_COMPAT
3296 #include "pcm_compat.c"
3297 #else
3298 #define snd_pcm_ioctl_compat    NULL
3299 #endif
3300
3301 /*
3302  *  To be removed helpers to keep binary compatibility
3303  */
3304
3305 #ifdef CONFIG_SND_SUPPORT_OLD_API
3306 #define __OLD_TO_NEW_MASK(x) ((x&7)|((x&0x07fffff8)<<5))
3307 #define __NEW_TO_OLD_MASK(x) ((x&7)|((x&0xffffff00)>>5))
3308
3309 static void snd_pcm_hw_convert_from_old_params(struct snd_pcm_hw_params *params,
3310                                                struct snd_pcm_hw_params_old *oparams)
3311 {
3312         unsigned int i;
3313
3314         memset(params, 0, sizeof(*params));
3315         params->flags = oparams->flags;
3316         for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3317                 params->masks[i].bits[0] = oparams->masks[i];
3318         memcpy(params->intervals, oparams->intervals, sizeof(oparams->intervals));
3319         params->rmask = __OLD_TO_NEW_MASK(oparams->rmask);
3320         params->cmask = __OLD_TO_NEW_MASK(oparams->cmask);
3321         params->info = oparams->info;
3322         params->msbits = oparams->msbits;
3323         params->rate_num = oparams->rate_num;
3324         params->rate_den = oparams->rate_den;
3325         params->fifo_size = oparams->fifo_size;
3326 }
3327
3328 static void snd_pcm_hw_convert_to_old_params(struct snd_pcm_hw_params_old *oparams,
3329                                              struct snd_pcm_hw_params *params)
3330 {
3331         unsigned int i;
3332
3333         memset(oparams, 0, sizeof(*oparams));
3334         oparams->flags = params->flags;
3335         for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3336                 oparams->masks[i] = params->masks[i].bits[0];
3337         memcpy(oparams->intervals, params->intervals, sizeof(oparams->intervals));
3338         oparams->rmask = __NEW_TO_OLD_MASK(params->rmask);
3339         oparams->cmask = __NEW_TO_OLD_MASK(params->cmask);
3340         oparams->info = params->info;
3341         oparams->msbits = params->msbits;
3342         oparams->rate_num = params->rate_num;
3343         oparams->rate_den = params->rate_den;
3344         oparams->fifo_size = params->fifo_size;
3345 }
3346
3347 static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream,
3348                                       struct snd_pcm_hw_params_old __user * _oparams)
3349 {
3350         struct snd_pcm_hw_params *params;
3351         struct snd_pcm_hw_params_old *oparams = NULL;
3352         int err;
3353
3354         params = kmalloc(sizeof(*params), GFP_KERNEL);
3355         if (!params)
3356                 return -ENOMEM;
3357
3358         oparams = memdup_user(_oparams, sizeof(*oparams));
3359         if (IS_ERR(oparams)) {
3360                 err = PTR_ERR(oparams);
3361                 goto out;
3362         }
3363         snd_pcm_hw_convert_from_old_params(params, oparams);
3364         err = snd_pcm_hw_refine(substream, params);
3365         snd_pcm_hw_convert_to_old_params(oparams, params);
3366         if (copy_to_user(_oparams, oparams, sizeof(*oparams))) {
3367                 if (!err)
3368                         err = -EFAULT;
3369         }
3370
3371         kfree(oparams);
3372 out:
3373         kfree(params);
3374         return err;
3375 }
3376
3377 static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream,
3378                                       struct snd_pcm_hw_params_old __user * _oparams)
3379 {
3380         struct snd_pcm_hw_params *params;
3381         struct snd_pcm_hw_params_old *oparams = NULL;
3382         int err;
3383
3384         params = kmalloc(sizeof(*params), GFP_KERNEL);
3385         if (!params)
3386                 return -ENOMEM;
3387
3388         oparams = memdup_user(_oparams, sizeof(*oparams));
3389         if (IS_ERR(oparams)) {
3390                 err = PTR_ERR(oparams);
3391                 goto out;
3392         }
3393         snd_pcm_hw_convert_from_old_params(params, oparams);
3394         err = snd_pcm_hw_params(substream, params);
3395         snd_pcm_hw_convert_to_old_params(oparams, params);
3396         if (copy_to_user(_oparams, oparams, sizeof(*oparams))) {
3397                 if (!err)
3398                         err = -EFAULT;
3399         }
3400
3401         kfree(oparams);
3402 out:
3403         kfree(params);
3404         return err;
3405 }
3406 #endif /* CONFIG_SND_SUPPORT_OLD_API */
3407
3408 #ifndef CONFIG_MMU
3409 static unsigned long snd_pcm_get_unmapped_area(struct file *file,
3410                                                unsigned long addr,
3411                                                unsigned long len,
3412                                                unsigned long pgoff,
3413                                                unsigned long flags)
3414 {
3415         struct snd_pcm_file *pcm_file = file->private_data;
3416         struct snd_pcm_substream *substream = pcm_file->substream;
3417         struct snd_pcm_runtime *runtime = substream->runtime;
3418         unsigned long offset = pgoff << PAGE_SHIFT;
3419
3420         switch (offset) {
3421         case SNDRV_PCM_MMAP_OFFSET_STATUS:
3422                 return (unsigned long)runtime->status;
3423         case SNDRV_PCM_MMAP_OFFSET_CONTROL:
3424                 return (unsigned long)runtime->control;
3425         default:
3426                 return (unsigned long)runtime->dma_area + offset;
3427         }
3428 }
3429 #else
3430 # define snd_pcm_get_unmapped_area NULL
3431 #endif
3432
3433 /*
3434  *  Register section
3435  */
3436
3437 const struct file_operations snd_pcm_f_ops[2] = {
3438         {
3439                 .owner =                THIS_MODULE,
3440                 .write =                snd_pcm_write,
3441                 .aio_write =            snd_pcm_aio_write,
3442                 .open =                 snd_pcm_playback_open,
3443                 .release =              snd_pcm_release,
3444                 .llseek =               no_llseek,
3445                 .poll =                 snd_pcm_playback_poll,
3446                 .unlocked_ioctl =       snd_pcm_playback_ioctl,
3447                 .compat_ioctl =         snd_pcm_ioctl_compat,
3448                 .mmap =                 snd_pcm_mmap,
3449                 .fasync =               snd_pcm_fasync,
3450                 .get_unmapped_area =    snd_pcm_get_unmapped_area,
3451         },
3452         {
3453                 .owner =                THIS_MODULE,
3454                 .read =                 snd_pcm_read,
3455                 .aio_read =             snd_pcm_aio_read,
3456                 .open =                 snd_pcm_capture_open,
3457                 .release =              snd_pcm_release,
3458                 .llseek =               no_llseek,
3459                 .poll =                 snd_pcm_capture_poll,
3460                 .unlocked_ioctl =       snd_pcm_capture_ioctl,
3461                 .compat_ioctl =         snd_pcm_ioctl_compat,
3462                 .mmap =                 snd_pcm_mmap,
3463                 .fasync =               snd_pcm_fasync,
3464                 .get_unmapped_area =    snd_pcm_get_unmapped_area,
3465         }
3466 };