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/time.h>
  26 #include <linux/pm_qos_params.h>
  27 #include <linux/uio.h>
  28 #include <linux/dma-mapping.h>
  29 #include <sound/core.h>
  30 #include <sound/control.h>
  31 #include <sound/info.h>
  32 #include <sound/pcm.h>
  33 #include <sound/pcm_params.h>
  34 #include <sound/timer.h>
  35 #include <sound/minors.h>
  36 #include <asm/io.h>
  37 #if defined(CONFIG_MIPS) && defined(CONFIG_DMA_NONCOHERENT)
  38 #include <dma-coherence.h>
  39 #endif
  40
  41 /*
  42  *  Compatibility
  43  */
  44
  45 struct snd_pcm_hw_params_old {
  46         unsigned int flags;
  47         unsigned int masks[SNDRV_PCM_HW_PARAM_SUBFORMAT -
  48                            SNDRV_PCM_HW_PARAM_ACCESS + 1];
  49         struct snd_interval intervals[SNDRV_PCM_HW_PARAM_TICK_TIME -
  50                                         SNDRV_PCM_HW_PARAM_SAMPLE_BITS + 1];
  51         unsigned int rmask;
  52         unsigned int cmask;
  53         unsigned int info;
  54         unsigned int msbits;
  55         unsigned int rate_num;
  56         unsigned int rate_den;
  57         snd_pcm_uframes_t fifo_size;
  58         unsigned char reserved[64];
  59 };
  60
  61 #ifdef CONFIG_SND_SUPPORT_OLD_API
  62 #define SNDRV_PCM_IOCTL_HW_REFINE_OLD _IOWR('A', 0x10, struct snd_pcm_hw_params_old)
  63 #define SNDRV_PCM_IOCTL_HW_PARAMS_OLD _IOWR('A', 0x11, struct snd_pcm_hw_params_old)
  64
  65 static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream,
  66                                       struct snd_pcm_hw_params_old __user * _oparams);
  67 static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream,
  68                                       struct snd_pcm_hw_params_old __user * _oparams);
  69 #endif
  70 static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream);
  71
  72 /*
  73  *
  74  */
  75
  76 DEFINE_RWLOCK(snd_pcm_link_rwlock);
  77 EXPORT_SYMBOL(snd_pcm_link_rwlock);
  78
  79 static DECLARE_RWSEM(snd_pcm_link_rwsem);
  80
  81 static inline mm_segment_t snd_enter_user(void)
  82 {
  83         mm_segment_t fs = get_fs();
  84         set_fs(get_ds());
  85         return fs;
  86 }
  87
  88 static inline void snd_leave_user(mm_segment_t fs)
  89 {
  90         set_fs(fs);
  91 }
  92
  93
  94
  95 int snd_pcm_info(struct snd_pcm_substream *substream, struct snd_pcm_info *info)
  96 {
  97         struct snd_pcm_runtime *runtime;
  98         struct snd_pcm *pcm = substream->pcm;
  99         struct snd_pcm_str *pstr = substream->pstr;
 100
 101         memset(info, 0, sizeof(*info));
 102         info->card = pcm->card->number;
 103         info->device = pcm->device;
 104         info->stream = substream->stream;
 105         info->subdevice = substream->number;
 106         strlcpy(info->id, pcm->id, sizeof(info->id));
 107         strlcpy(info->name, pcm->name, sizeof(info->name));
 108         info->dev_class = pcm->dev_class;
 109         info->dev_subclass = pcm->dev_subclass;
 110         info->subdevices_count = pstr->substream_count;
 111         info->subdevices_avail = pstr->substream_count - pstr->substream_opened;
 112         strlcpy(info->subname, substream->name, sizeof(info->subname));
 113         runtime = substream->runtime;
 114         /* AB: FIXME!!! This is definitely nonsense */
 115         if (runtime) {
 116                 info->sync = runtime->sync;
 117                 substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_INFO, info);
 118         }
 119         return 0;
 120 }
 121
 122 int snd_pcm_info_user(struct snd_pcm_substream *substream,
 123                       struct snd_pcm_info __user * _info)
 124 {
 125         struct snd_pcm_info *info;
 126         int err;
 127
 128         info = kmalloc(sizeof(*info), GFP_KERNEL);
 129         if (! info)
 130                 return -ENOMEM;
 131         err = snd_pcm_info(substream, info);
 132         if (err >= 0) {
 133                 if (copy_to_user(_info, info, sizeof(*info)))
 134                         err = -EFAULT;
 135         }
 136         kfree(info);
 137         return err;
 138 }
 139
 140 #undef RULES_DEBUG
 141
 142 #ifdef RULES_DEBUG
 143 #define HW_PARAM(v) [SNDRV_PCM_HW_PARAM_##v] = #v
 144 static const char * const snd_pcm_hw_param_names[] = {
 145         HW_PARAM(ACCESS),
 146         HW_PARAM(FORMAT),
 147         HW_PARAM(SUBFORMAT),
 148         HW_PARAM(SAMPLE_BITS),
 149         HW_PARAM(FRAME_BITS),
 150         HW_PARAM(CHANNELS),
 151         HW_PARAM(RATE),
 152         HW_PARAM(PERIOD_TIME),
 153         HW_PARAM(PERIOD_SIZE),
 154         HW_PARAM(PERIOD_BYTES),
 155         HW_PARAM(PERIODS),
 156         HW_PARAM(BUFFER_TIME),
 157         HW_PARAM(BUFFER_SIZE),
 158         HW_PARAM(BUFFER_BYTES),
 159         HW_PARAM(TICK_TIME),
 160 };
 161 #endif
 162
 163 int snd_pcm_hw_refine(struct snd_pcm_substream *substream,
 164                       struct snd_pcm_hw_params *params)
 165 {
 166         unsigned int k;
 167         struct snd_pcm_hardware *hw;
 168         struct snd_interval *i = NULL;
 169         struct snd_mask *m = NULL;
 170         struct snd_pcm_hw_constraints *constrs = &substream->runtime->hw_constraints;
 171         unsigned int rstamps[constrs->rules_num];
 172         unsigned int vstamps[SNDRV_PCM_HW_PARAM_LAST_INTERVAL + 1];
 173         unsigned int stamp = 2;
 174         int changed, again;
 175
 176         params->info = 0;
 177         params->fifo_size = 0;
 178         if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_SAMPLE_BITS))
 179                 params->msbits = 0;
 180         if (params->rmask & (1 << SNDRV_PCM_HW_PARAM_RATE)) {
 181                 params->rate_num = 0;
 182                 params->rate_den = 0;
 183         }
 184
 185         for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
 186                 m = hw_param_mask(params, k);
 187                 if (snd_mask_empty(m))
 188                         return -EINVAL;
 189                 if (!(params->rmask & (1 << k)))
 190                         continue;
 191 #ifdef RULES_DEBUG
 192                 printk(KERN_DEBUG "%s = ", snd_pcm_hw_param_names[k]);
 193                 printk("%04x%04x%04x%04x -> ", m->bits[3], m->bits[2], m->bits[1], m->bits[0]);
 194 #endif
 195                 changed = snd_mask_refine(m, constrs_mask(constrs, k));
 196 #ifdef RULES_DEBUG
 197                 printk("%04x%04x%04x%04x\n", m->bits[3], m->bits[2], m->bits[1], m->bits[0]);
 198 #endif
 199                 if (changed)
 200                         params->cmask |= 1 << k;
 201                 if (changed < 0)
 202                         return changed;
 203         }
 204
 205         for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
 206                 i = hw_param_interval(params, k);
 207                 if (snd_interval_empty(i))
 208                         return -EINVAL;
 209                 if (!(params->rmask & (1 << k)))
 210                         continue;
 211 #ifdef RULES_DEBUG
 212                 printk(KERN_DEBUG "%s = ", snd_pcm_hw_param_names[k]);
 213                 if (i->empty)
 214                         printk("empty");
 215                 else
 216                         printk("%c%u %u%c",
 217                                i->openmin ? '(' : '[', i->min,
 218                                i->max, i->openmax ? ')' : ']');
 219                 printk(" -> ");
 220 #endif
 221                 changed = snd_interval_refine(i, constrs_interval(constrs, k));
 222 #ifdef RULES_DEBUG
 223                 if (i->empty)
 224                         printk("empty\n");
 225                 else
 226                         printk("%c%u %u%c\n",
 227                                i->openmin ? '(' : '[', i->min,
 228                                i->max, i->openmax ? ')' : ']');
 229 #endif
 230                 if (changed)
 231                         params->cmask |= 1 << k;
 232                 if (changed < 0)
 233                         return changed;
 234         }
 235
 236         for (k = 0; k < constrs->rules_num; k++)
 237                 rstamps[k] = 0;
 238         for (k = 0; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++)
 239                 vstamps[k] = (params->rmask & (1 << k)) ? 1 : 0;
 240         do {
 241                 again = 0;
 242                 for (k = 0; k < constrs->rules_num; k++) {
 243                         struct snd_pcm_hw_rule *r = &constrs->rules[k];
 244                         unsigned int d;
 245                         int doit = 0;
 246                         if (r->cond && !(r->cond & params->flags))
 247                                 continue;
 248                         for (d = 0; r->deps[d] >= 0; d++) {
 249                                 if (vstamps[r->deps[d]] > rstamps[k]) {
 250                                         doit = 1;
 251                                         break;
 252                                 }
 253                         }
 254                         if (!doit)
 255                                 continue;
 256 #ifdef RULES_DEBUG
 257                         printk(KERN_DEBUG "Rule %d [%p]: ", k, r->func);
 258                         if (r->var >= 0) {
 259                                 printk("%s = ", snd_pcm_hw_param_names[r->var]);
 260                                 if (hw_is_mask(r->var)) {
 261                                         m = hw_param_mask(params, r->var);
 262                                         printk("%x", *m->bits);
 263                                 } else {
 264                                         i = hw_param_interval(params, r->var);
 265                                         if (i->empty)
 266                                                 printk("empty");
 267                                         else
 268                                                 printk("%c%u %u%c",
 269                                                        i->openmin ? '(' : '[', i->min,
 270                                                        i->max, i->openmax ? ')' : ']');
 271                                 }
 272                         }
 273 #endif
 274                         changed = r->func(params, r);
 275 #ifdef RULES_DEBUG
 276                         if (r->var >= 0) {
 277                                 printk(" -> ");
 278                                 if (hw_is_mask(r->var))
 279                                         printk("%x", *m->bits);
 280                                 else {
 281                                         if (i->empty)
 282                                                 printk("empty");
 283                                         else
 284                                                 printk("%c%u %u%c",
 285                                                        i->openmin ? '(' : '[', i->min,
 286                                                        i->max, i->openmax ? ')' : ']');
 287                                 }
 288                         }
 289                         printk("\n");
 290 #endif
 291                         rstamps[k] = stamp;
 292                         if (changed && r->var >= 0) {
 293                                 params->cmask |= (1 << r->var);
 294                                 vstamps[r->var] = stamp;
 295                                 again = 1;
 296                         }
 297                         if (changed < 0)
 298                                 return changed;
 299                         stamp++;
 300                 }
 301         } while (again);
 302         if (!params->msbits) {
 303                 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS);
 304                 if (snd_interval_single(i))
 305                         params->msbits = snd_interval_value(i);
 306         }
 307
 308         if (!params->rate_den) {
 309                 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
 310                 if (snd_interval_single(i)) {
 311                         params->rate_num = snd_interval_value(i);
 312                         params->rate_den = 1;
 313                 }
 314         }
 315
 316         hw = &substream->runtime->hw;
 317         if (!params->info)
 318                 params->info = hw->info & ~SNDRV_PCM_INFO_FIFO_IN_FRAMES;
 319         if (!params->fifo_size) {
 320                 m = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
 321                 i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
 322                 if (snd_mask_min(m) == snd_mask_max(m) &&
 323                     snd_interval_min(i) == snd_interval_max(i)) {
 324                         changed = substream->ops->ioctl(substream,
 325                                         SNDRV_PCM_IOCTL1_FIFO_SIZE, params);
 326                         if (changed < 0)
 327                                 return changed;
 328                 }
 329         }
 330         params->rmask = 0;
 331         return 0;
 332 }
 333
 334 EXPORT_SYMBOL(snd_pcm_hw_refine);
 335
 336 static int snd_pcm_hw_refine_user(struct snd_pcm_substream *substream,
 337                                   struct snd_pcm_hw_params __user * _params)
 338 {
 339         struct snd_pcm_hw_params *params;
 340         int err;
 341
 342         params = memdup_user(_params, sizeof(*params));
 343         if (IS_ERR(params))
 344                 return PTR_ERR(params);
 345
 346         err = snd_pcm_hw_refine(substream, params);
 347         if (copy_to_user(_params, params, sizeof(*params))) {
 348                 if (!err)
 349                         err = -EFAULT;
 350         }
 351
 352         kfree(params);
 353         return err;
 354 }
 355
 356 static int period_to_usecs(struct snd_pcm_runtime *runtime)
 357 {
 358         int usecs;
 359
 360         if (! runtime->rate)
 361                 return -1; /* invalid */
 362
 363         /* take 75% of period time as the deadline */
 364         usecs = (750000 / runtime->rate) * runtime->period_size;
 365         usecs += ((750000 % runtime->rate) * runtime->period_size) /
 366                 runtime->rate;
 367
 368         return usecs;
 369 }
 370
 371 static void snd_pcm_set_state(struct snd_pcm_substream *substream, int state)
 372 {
 373         snd_pcm_stream_lock_irq(substream);
 374         if (substream->runtime->status->state != SNDRV_PCM_STATE_DISCONNECTED)
 375                 substream->runtime->status->state = state;
 376         snd_pcm_stream_unlock_irq(substream);
 377 }
 378
 379 static int snd_pcm_hw_params(struct snd_pcm_substream *substream,
 380                              struct snd_pcm_hw_params *params)
 381 {
 382         struct snd_pcm_runtime *runtime;
 383         int err, usecs;
 384         unsigned int bits;
 385         snd_pcm_uframes_t frames;
 386
 387         if (PCM_RUNTIME_CHECK(substream))
 388                 return -ENXIO;
 389         runtime = substream->runtime;
 390         snd_pcm_stream_lock_irq(substream);
 391         switch (runtime->status->state) {
 392         case SNDRV_PCM_STATE_OPEN:
 393         case SNDRV_PCM_STATE_SETUP:
 394         case SNDRV_PCM_STATE_PREPARED:
 395                 break;
 396         default:
 397                 snd_pcm_stream_unlock_irq(substream);
 398                 return -EBADFD;
 399         }
 400         snd_pcm_stream_unlock_irq(substream);
 401 #if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
 402         if (!substream->oss.oss)
 403 #endif
 404                 if (atomic_read(&substream->mmap_count))
 405                         return -EBADFD;
 406
 407         params->rmask = ~0U;
 408         err = snd_pcm_hw_refine(substream, params);
 409         if (err < 0)
 410                 goto _error;
 411
 412         err = snd_pcm_hw_params_choose(substream, params);
 413         if (err < 0)
 414                 goto _error;
 415
 416         if (substream->ops->hw_params != NULL) {
 417                 err = substream->ops->hw_params(substream, params);
 418                 if (err < 0)
 419                         goto _error;
 420         }
 421
 422         runtime->access = params_access(params);
 423         runtime->format = params_format(params);
 424         runtime->subformat = params_subformat(params);
 425         runtime->channels = params_channels(params);
 426         runtime->rate = params_rate(params);
 427         runtime->period_size = params_period_size(params);
 428         runtime->periods = params_periods(params);
 429         runtime->buffer_size = params_buffer_size(params);
 430         runtime->info = params->info;
 431         runtime->rate_num = params->rate_num;
 432         runtime->rate_den = params->rate_den;
 433         runtime->no_period_wakeup =
 434                         (params->info & SNDRV_PCM_INFO_NO_PERIOD_WAKEUP) &&
 435                         (params->flags & SNDRV_PCM_HW_PARAMS_NO_PERIOD_WAKEUP);
 436
 437         bits = snd_pcm_format_physical_width(runtime->format);
 438         runtime->sample_bits = bits;
 439         bits *= runtime->channels;
 440         runtime->frame_bits = bits;
 441         frames = 1;
 442         while (bits % 8 != 0) {
 443                 bits *= 2;
 444                 frames *= 2;
 445         }
 446         runtime->byte_align = bits / 8;
 447         runtime->min_align = frames;
 448
 449         /* Default sw params */
 450         runtime->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
 451         runtime->period_step = 1;
 452         runtime->control->avail_min = runtime->period_size;
 453         runtime->start_threshold = 1;
 454         runtime->stop_threshold = runtime->buffer_size;
 455         runtime->silence_threshold = 0;
 456         runtime->silence_size = 0;
 457         runtime->boundary = runtime->buffer_size;
 458         while (runtime->boundary * 2 <= LONG_MAX - runtime->buffer_size)
 459                 runtime->boundary *= 2;
 460
 461         snd_pcm_timer_resolution_change(substream);
 462         snd_pcm_set_state(substream, SNDRV_PCM_STATE_SETUP);
 463
 464         if (pm_qos_request_active(&substream->latency_pm_qos_req))
 465                 pm_qos_remove_request(&substream->latency_pm_qos_req);
 466         if ((usecs = period_to_usecs(runtime)) >= 0)
 467                 pm_qos_add_request(&substream->latency_pm_qos_req,
 468                                    PM_QOS_CPU_DMA_LATENCY, usecs);
 469         return 0;
 470  _error:
 471         /* hardware might be unusable from this time,
 472            so we force application to retry to set
 473            the correct hardware parameter settings */
 474         snd_pcm_set_state(substream, SNDRV_PCM_STATE_OPEN);
 475         if (substream->ops->hw_free != NULL)
 476                 substream->ops->hw_free(substream);
 477         return err;
 478 }
 479
 480 static int snd_pcm_hw_params_user(struct snd_pcm_substream *substream,
 481                                   struct snd_pcm_hw_params __user * _params)
 482 {
 483         struct snd_pcm_hw_params *params;
 484         int err;
 485
 486         params = memdup_user(_params, sizeof(*params));
 487         if (IS_ERR(params))
 488                 return PTR_ERR(params);
 489
 490         err = snd_pcm_hw_params(substream, params);
 491         if (copy_to_user(_params, params, sizeof(*params))) {
 492                 if (!err)
 493                         err = -EFAULT;
 494         }
 495
 496         kfree(params);
 497         return err;
 498 }
 499
 500 static int snd_pcm_hw_free(struct snd_pcm_substream *substream)
 501 {
 502         struct snd_pcm_runtime *runtime;
 503         int result = 0;
 504
 505         if (PCM_RUNTIME_CHECK(substream))
 506                 return -ENXIO;
 507         runtime = substream->runtime;
 508         snd_pcm_stream_lock_irq(substream);
 509         switch (runtime->status->state) {
 510         case SNDRV_PCM_STATE_SETUP:
 511         case SNDRV_PCM_STATE_PREPARED:
 512                 break;
 513         default:
 514                 snd_pcm_stream_unlock_irq(substream);
 515                 return -EBADFD;
 516         }
 517         snd_pcm_stream_unlock_irq(substream);
 518         if (atomic_read(&substream->mmap_count))
 519                 return -EBADFD;
 520         if (substream->ops->hw_free)
 521                 result = substream->ops->hw_free(substream);
 522         snd_pcm_set_state(substream, SNDRV_PCM_STATE_OPEN);
 523         pm_qos_remove_request(&substream->latency_pm_qos_req);
 524         return result;
 525 }
 526
 527 static int snd_pcm_sw_params(struct snd_pcm_substream *substream,
 528                              struct snd_pcm_sw_params *params)
 529 {
 530         struct snd_pcm_runtime *runtime;
 531         int err;
 532
 533         if (PCM_RUNTIME_CHECK(substream))
 534                 return -ENXIO;
 535         runtime = substream->runtime;
 536         snd_pcm_stream_lock_irq(substream);
 537         if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
 538                 snd_pcm_stream_unlock_irq(substream);
 539                 return -EBADFD;
 540         }
 541         snd_pcm_stream_unlock_irq(substream);
 542
 543         if (params->tstamp_mode > SNDRV_PCM_TSTAMP_LAST)
 544                 return -EINVAL;
 545         if (params->avail_min == 0)
 546                 return -EINVAL;
 547         if (params->silence_size >= runtime->boundary) {
 548                 if (params->silence_threshold != 0)
 549                         return -EINVAL;
 550         } else {
 551                 if (params->silence_size > params->silence_threshold)
 552                         return -EINVAL;
 553                 if (params->silence_threshold > runtime->buffer_size)
 554                         return -EINVAL;
 555         }
 556         err = 0;
 557         snd_pcm_stream_lock_irq(substream);
 558         runtime->tstamp_mode = params->tstamp_mode;
 559         runtime->period_step = params->period_step;
 560         runtime->control->avail_min = params->avail_min;
 561         runtime->start_threshold = params->start_threshold;
 562         runtime->stop_threshold = params->stop_threshold;
 563         runtime->silence_threshold = params->silence_threshold;
 564         runtime->silence_size = params->silence_size;
 565         params->boundary = runtime->boundary;
 566         if (snd_pcm_running(substream)) {
 567                 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
 568                     runtime->silence_size > 0)
 569                         snd_pcm_playback_silence(substream, ULONG_MAX);
 570                 err = snd_pcm_update_state(substream, runtime);
 571         }
 572         snd_pcm_stream_unlock_irq(substream);
 573         return err;
 574 }
 575
 576 static int snd_pcm_sw_params_user(struct snd_pcm_substream *substream,
 577                                   struct snd_pcm_sw_params __user * _params)
 578 {
 579         struct snd_pcm_sw_params params;
 580         int err;
 581         if (copy_from_user(&params, _params, sizeof(params)))
 582                 return -EFAULT;
 583         err = snd_pcm_sw_params(substream, &params);
 584         if (copy_to_user(_params, &params, sizeof(params)))
 585                 return -EFAULT;
 586         return err;
 587 }
 588
 589 int snd_pcm_status(struct snd_pcm_substream *substream,
 590                    struct snd_pcm_status *status)
 591 {
 592         struct snd_pcm_runtime *runtime = substream->runtime;
 593
 594         snd_pcm_stream_lock_irq(substream);
 595         status->state = runtime->status->state;
 596         status->suspended_state = runtime->status->suspended_state;
 597         if (status->state == SNDRV_PCM_STATE_OPEN)
 598                 goto _end;
 599         status->trigger_tstamp = runtime->trigger_tstamp;
 600         if (snd_pcm_running(substream)) {
 601                 snd_pcm_update_hw_ptr(substream);
 602                 if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_ENABLE) {
 603                         status->tstamp = runtime->status->tstamp;
 604                         goto _tstamp_end;
 605                 }
 606         }
 607         snd_pcm_gettime(runtime, &status->tstamp);
 608  _tstamp_end:
 609         status->appl_ptr = runtime->control->appl_ptr;
 610         status->hw_ptr = runtime->status->hw_ptr;
 611         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 612                 status->avail = snd_pcm_playback_avail(runtime);
 613                 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING ||
 614                     runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
 615                         status->delay = runtime->buffer_size - status->avail;
 616                         status->delay += runtime->delay;
 617                 } else
 618                         status->delay = 0;
 619         } else {
 620                 status->avail = snd_pcm_capture_avail(runtime);
 621                 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING)
 622                         status->delay = status->avail + runtime->delay;
 623                 else
 624                         status->delay = 0;
 625         }
 626         status->avail_max = runtime->avail_max;
 627         status->overrange = runtime->overrange;
 628         runtime->avail_max = 0;
 629         runtime->overrange = 0;
 630  _end:
 631         snd_pcm_stream_unlock_irq(substream);
 632         return 0;
 633 }
 634
 635 static int snd_pcm_status_user(struct snd_pcm_substream *substream,
 636                                struct snd_pcm_status __user * _status)
 637 {
 638         struct snd_pcm_status status;
 639         int res;
 640
 641         memset(&status, 0, sizeof(status));
 642         res = snd_pcm_status(substream, &status);
 643         if (res < 0)
 644                 return res;
 645         if (copy_to_user(_status, &status, sizeof(status)))
 646                 return -EFAULT;
 647         return 0;
 648 }
 649
 650 static int snd_pcm_channel_info(struct snd_pcm_substream *substream,
 651                                 struct snd_pcm_channel_info * info)
 652 {
 653         struct snd_pcm_runtime *runtime;
 654         unsigned int channel;
 655
 656         channel = info->channel;
 657         runtime = substream->runtime;
 658         snd_pcm_stream_lock_irq(substream);
 659         if (runtime->status->state == SNDRV_PCM_STATE_OPEN) {
 660                 snd_pcm_stream_unlock_irq(substream);
 661                 return -EBADFD;
 662         }
 663         snd_pcm_stream_unlock_irq(substream);
 664         if (channel >= runtime->channels)
 665                 return -EINVAL;
 666         memset(info, 0, sizeof(*info));
 667         info->channel = channel;
 668         return substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_CHANNEL_INFO, info);
 669 }
 670
 671 static int snd_pcm_channel_info_user(struct snd_pcm_substream *substream,
 672                                      struct snd_pcm_channel_info __user * _info)
 673 {
 674         struct snd_pcm_channel_info info;
 675         int res;
 676
 677         if (copy_from_user(&info, _info, sizeof(info)))
 678                 return -EFAULT;
 679         res = snd_pcm_channel_info(substream, &info);
 680         if (res < 0)
 681                 return res;
 682         if (copy_to_user(_info, &info, sizeof(info)))
 683                 return -EFAULT;
 684         return 0;
 685 }
 686
 687 static void snd_pcm_trigger_tstamp(struct snd_pcm_substream *substream)
 688 {
 689         struct snd_pcm_runtime *runtime = substream->runtime;
 690         if (runtime->trigger_master == NULL)
 691                 return;
 692         if (runtime->trigger_master == substream) {
 693                 snd_pcm_gettime(runtime, &runtime->trigger_tstamp);
 694         } else {
 695                 snd_pcm_trigger_tstamp(runtime->trigger_master);
 696                 runtime->trigger_tstamp = runtime->trigger_master->runtime->trigger_tstamp;
 697         }
 698         runtime->trigger_master = NULL;
 699 }
 700
 701 struct action_ops {
 702         int (*pre_action)(struct snd_pcm_substream *substream, int state);
 703         int (*do_action)(struct snd_pcm_substream *substream, int state);
 704         void (*undo_action)(struct snd_pcm_substream *substream, int state);
 705         void (*post_action)(struct snd_pcm_substream *substream, int state);
 706 };
 707
 708 /*
 709  *  this functions is core for handling of linked stream
 710  *  Note: the stream state might be changed also on failure
 711  *  Note2: call with calling stream lock + link lock
 712  */
 713 static int snd_pcm_action_group(struct action_ops *ops,
 714                                 struct snd_pcm_substream *substream,
 715                                 int state, int do_lock)
 716 {
 717         struct snd_pcm_substream *s = NULL;
 718         struct snd_pcm_substream *s1;
 719         int res = 0;
 720
 721         snd_pcm_group_for_each_entry(s, substream) {
 722                 if (do_lock && s != substream)
 723                         spin_lock_nested(&s->self_group.lock,
 724                                          SINGLE_DEPTH_NESTING);
 725                 res = ops->pre_action(s, state);
 726                 if (res < 0)
 727                         goto _unlock;
 728         }
 729         snd_pcm_group_for_each_entry(s, substream) {
 730                 res = ops->do_action(s, state);
 731                 if (res < 0) {
 732                         if (ops->undo_action) {
 733                                 snd_pcm_group_for_each_entry(s1, substream) {
 734                                         if (s1 == s) /* failed stream */
 735                                                 break;
 736                                         ops->undo_action(s1, state);
 737                                 }
 738                         }
 739                         s = NULL; /* unlock all */
 740                         goto _unlock;
 741                 }
 742         }
 743         snd_pcm_group_for_each_entry(s, substream) {
 744                 ops->post_action(s, state);
 745         }
 746  _unlock:
 747         if (do_lock) {
 748                 /* unlock streams */
 749                 snd_pcm_group_for_each_entry(s1, substream) {
 750                         if (s1 != substream)
 751                                 spin_unlock(&s1->self_group.lock);
 752                         if (s1 == s)    /* end */
 753                                 break;
 754                 }
 755         }
 756         return res;
 757 }
 758
 759 /*
 760  *  Note: call with stream lock
 761  */
 762 static int snd_pcm_action_single(struct action_ops *ops,
 763                                  struct snd_pcm_substream *substream,
 764                                  int state)
 765 {
 766         int res;
 767
 768         res = ops->pre_action(substream, state);
 769         if (res < 0)
 770                 return res;
 771         res = ops->do_action(substream, state);
 772         if (res == 0)
 773                 ops->post_action(substream, state);
 774         else if (ops->undo_action)
 775                 ops->undo_action(substream, state);
 776         return res;
 777 }
 778
 779 /*
 780  *  Note: call with stream lock
 781  */
 782 static int snd_pcm_action(struct action_ops *ops,
 783                           struct snd_pcm_substream *substream,
 784                           int state)
 785 {
 786         int res;
 787
 788         if (snd_pcm_stream_linked(substream)) {
 789                 if (!spin_trylock(&substream->group->lock)) {
 790                         spin_unlock(&substream->self_group.lock);
 791                         spin_lock(&substream->group->lock);
 792                         spin_lock(&substream->self_group.lock);
 793                 }
 794                 res = snd_pcm_action_group(ops, substream, state, 1);
 795                 spin_unlock(&substream->group->lock);
 796         } else {
 797                 res = snd_pcm_action_single(ops, substream, state);
 798         }
 799         return res;
 800 }
 801
 802 /*
 803  *  Note: don't use any locks before
 804  */
 805 static int snd_pcm_action_lock_irq(struct action_ops *ops,
 806                                    struct snd_pcm_substream *substream,
 807                                    int state)
 808 {
 809         int res;
 810
 811         read_lock_irq(&snd_pcm_link_rwlock);
 812         if (snd_pcm_stream_linked(substream)) {
 813                 spin_lock(&substream->group->lock);
 814                 spin_lock(&substream->self_group.lock);
 815                 res = snd_pcm_action_group(ops, substream, state, 1);
 816                 spin_unlock(&substream->self_group.lock);
 817                 spin_unlock(&substream->group->lock);
 818         } else {
 819                 spin_lock(&substream->self_group.lock);
 820                 res = snd_pcm_action_single(ops, substream, state);
 821                 spin_unlock(&substream->self_group.lock);
 822         }
 823         read_unlock_irq(&snd_pcm_link_rwlock);
 824         return res;
 825 }
 826
 827 /*
 828  */
 829 static int snd_pcm_action_nonatomic(struct action_ops *ops,
 830                                     struct snd_pcm_substream *substream,
 831                                     int state)
 832 {
 833         int res;
 834
 835         down_read(&snd_pcm_link_rwsem);
 836         if (snd_pcm_stream_linked(substream))
 837                 res = snd_pcm_action_group(ops, substream, state, 0);
 838         else
 839                 res = snd_pcm_action_single(ops, substream, state);
 840         up_read(&snd_pcm_link_rwsem);
 841         return res;
 842 }
 843
 844 /*
 845  * start callbacks
 846  */
 847 static int snd_pcm_pre_start(struct snd_pcm_substream *substream, int state)
 848 {
 849         struct snd_pcm_runtime *runtime = substream->runtime;
 850         if (runtime->status->state != SNDRV_PCM_STATE_PREPARED)
 851                 return -EBADFD;
 852         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
 853             !snd_pcm_playback_data(substream))
 854                 return -EPIPE;
 855         runtime->trigger_master = substream;
 856         return 0;
 857 }
 858
 859 static int snd_pcm_do_start(struct snd_pcm_substream *substream, int state)
 860 {
 861         if (substream->runtime->trigger_master != substream)
 862                 return 0;
 863         return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_START);
 864 }
 865
 866 static void snd_pcm_undo_start(struct snd_pcm_substream *substream, int state)
 867 {
 868         if (substream->runtime->trigger_master == substream)
 869                 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
 870 }
 871
 872 static void snd_pcm_post_start(struct snd_pcm_substream *substream, int state)
 873 {
 874         struct snd_pcm_runtime *runtime = substream->runtime;
 875         snd_pcm_trigger_tstamp(substream);
 876         runtime->hw_ptr_jiffies = jiffies;
 877         runtime->hw_ptr_buffer_jiffies = (runtime->buffer_size * HZ) /
 878                                                             runtime->rate;
 879         runtime->status->state = state;
 880         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
 881             runtime->silence_size > 0)
 882                 snd_pcm_playback_silence(substream, ULONG_MAX);
 883         if (substream->timer)
 884                 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTART,
 885                                  &runtime->trigger_tstamp);
 886 }
 887
 888 static struct action_ops snd_pcm_action_start = {
 889         .pre_action = snd_pcm_pre_start,
 890         .do_action = snd_pcm_do_start,
 891         .undo_action = snd_pcm_undo_start,
 892         .post_action = snd_pcm_post_start
 893 };
 894
 895 /**
 896  * snd_pcm_start - start all linked streams
 897  * @substream: the PCM substream instance
 898  */
 899 int snd_pcm_start(struct snd_pcm_substream *substream)
 900 {
 901         return snd_pcm_action(&snd_pcm_action_start, substream,
 902                               SNDRV_PCM_STATE_RUNNING);
 903 }
 904
 905 /*
 906  * stop callbacks
 907  */
 908 static int snd_pcm_pre_stop(struct snd_pcm_substream *substream, int state)
 909 {
 910         struct snd_pcm_runtime *runtime = substream->runtime;
 911         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
 912                 return -EBADFD;
 913         runtime->trigger_master = substream;
 914         return 0;
 915 }
 916
 917 static int snd_pcm_do_stop(struct snd_pcm_substream *substream, int state)
 918 {
 919         if (substream->runtime->trigger_master == substream &&
 920             snd_pcm_running(substream))
 921                 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
 922         return 0; /* unconditonally stop all substreams */
 923 }
 924
 925 static void snd_pcm_post_stop(struct snd_pcm_substream *substream, int state)
 926 {
 927         struct snd_pcm_runtime *runtime = substream->runtime;
 928         if (runtime->status->state != state) {
 929                 snd_pcm_trigger_tstamp(substream);
 930                 if (substream->timer)
 931                         snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSTOP,
 932                                          &runtime->trigger_tstamp);
 933                 runtime->status->state = state;
 934         }
 935         wake_up(&runtime->sleep);
 936         wake_up(&runtime->tsleep);
 937 }
 938
 939 static struct action_ops snd_pcm_action_stop = {
 940         .pre_action = snd_pcm_pre_stop,
 941         .do_action = snd_pcm_do_stop,
 942         .post_action = snd_pcm_post_stop
 943 };
 944
 945 /**
 946  * snd_pcm_stop - try to stop all running streams in the substream group
 947  * @substream: the PCM substream instance
 948  * @state: PCM state after stopping the stream
 949  *
 950  * The state of each stream is then changed to the given state unconditionally.
 951  */
 952 int snd_pcm_stop(struct snd_pcm_substream *substream, snd_pcm_state_t state)
 953 {
 954         return snd_pcm_action(&snd_pcm_action_stop, substream, state);
 955 }
 956
 957 EXPORT_SYMBOL(snd_pcm_stop);
 958
 959 /**
 960  * snd_pcm_drain_done - stop the DMA only when the given stream is playback
 961  * @substream: the PCM substream
 962  *
 963  * After stopping, the state is changed to SETUP.
 964  * Unlike snd_pcm_stop(), this affects only the given stream.
 965  */
 966 int snd_pcm_drain_done(struct snd_pcm_substream *substream)
 967 {
 968         return snd_pcm_action_single(&snd_pcm_action_stop, substream,
 969                                      SNDRV_PCM_STATE_SETUP);
 970 }
 971
 972 /*
 973  * pause callbacks
 974  */
 975 static int snd_pcm_pre_pause(struct snd_pcm_substream *substream, int push)
 976 {
 977         struct snd_pcm_runtime *runtime = substream->runtime;
 978         if (!(runtime->info & SNDRV_PCM_INFO_PAUSE))
 979                 return -ENOSYS;
 980         if (push) {
 981                 if (runtime->status->state != SNDRV_PCM_STATE_RUNNING)
 982                         return -EBADFD;
 983         } else if (runtime->status->state != SNDRV_PCM_STATE_PAUSED)
 984                 return -EBADFD;
 985         runtime->trigger_master = substream;
 986         return 0;
 987 }
 988
 989 static int snd_pcm_do_pause(struct snd_pcm_substream *substream, int push)
 990 {
 991         if (substream->runtime->trigger_master != substream)
 992                 return 0;
 993         /* some drivers might use hw_ptr to recover from the pause -
 994            update the hw_ptr now */
 995         if (push)
 996                 snd_pcm_update_hw_ptr(substream);
 997         /* The jiffies check in snd_pcm_update_hw_ptr*() is done by
 998          * a delta between the current jiffies, this gives a large enough
 999          * delta, effectively to skip the check once.
1000          */
1001         substream->runtime->hw_ptr_jiffies = jiffies - HZ * 1000;
1002         return substream->ops->trigger(substream,
1003                                        push ? SNDRV_PCM_TRIGGER_PAUSE_PUSH :
1004                                               SNDRV_PCM_TRIGGER_PAUSE_RELEASE);
1005 }
1006
1007 static void snd_pcm_undo_pause(struct snd_pcm_substream *substream, int push)
1008 {
1009         if (substream->runtime->trigger_master == substream)
1010                 substream->ops->trigger(substream,
1011                                         push ? SNDRV_PCM_TRIGGER_PAUSE_RELEASE :
1012                                         SNDRV_PCM_TRIGGER_PAUSE_PUSH);
1013 }
1014
1015 static void snd_pcm_post_pause(struct snd_pcm_substream *substream, int push)
1016 {
1017         struct snd_pcm_runtime *runtime = substream->runtime;
1018         snd_pcm_trigger_tstamp(substream);
1019         if (push) {
1020                 runtime->status->state = SNDRV_PCM_STATE_PAUSED;
1021                 if (substream->timer)
1022                         snd_timer_notify(substream->timer,
1023                                          SNDRV_TIMER_EVENT_MPAUSE,
1024                                          &runtime->trigger_tstamp);
1025                 wake_up(&runtime->sleep);
1026                 wake_up(&runtime->tsleep);
1027         } else {
1028                 runtime->status->state = SNDRV_PCM_STATE_RUNNING;
1029                 if (substream->timer)
1030                         snd_timer_notify(substream->timer,
1031                                          SNDRV_TIMER_EVENT_MCONTINUE,
1032                                          &runtime->trigger_tstamp);
1033         }
1034 }
1035
1036 static struct action_ops snd_pcm_action_pause = {
1037         .pre_action = snd_pcm_pre_pause,
1038         .do_action = snd_pcm_do_pause,
1039         .undo_action = snd_pcm_undo_pause,
1040         .post_action = snd_pcm_post_pause
1041 };
1042
1043 /*
1044  * Push/release the pause for all linked streams.
1045  */
1046 static int snd_pcm_pause(struct snd_pcm_substream *substream, int push)
1047 {
1048         return snd_pcm_action(&snd_pcm_action_pause, substream, push);
1049 }
1050
1051 #ifdef CONFIG_PM
1052 /* suspend */
1053
1054 static int snd_pcm_pre_suspend(struct snd_pcm_substream *substream, int state)
1055 {
1056         struct snd_pcm_runtime *runtime = substream->runtime;
1057         if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1058                 return -EBUSY;
1059         runtime->trigger_master = substream;
1060         return 0;
1061 }
1062
1063 static int snd_pcm_do_suspend(struct snd_pcm_substream *substream, int state)
1064 {
1065         struct snd_pcm_runtime *runtime = substream->runtime;
1066         if (runtime->trigger_master != substream)
1067                 return 0;
1068         if (! snd_pcm_running(substream))
1069                 return 0;
1070         substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1071         return 0; /* suspend unconditionally */
1072 }
1073
1074 static void snd_pcm_post_suspend(struct snd_pcm_substream *substream, int state)
1075 {
1076         struct snd_pcm_runtime *runtime = substream->runtime;
1077         snd_pcm_trigger_tstamp(substream);
1078         if (substream->timer)
1079                 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MSUSPEND,
1080                                  &runtime->trigger_tstamp);
1081         runtime->status->suspended_state = runtime->status->state;
1082         runtime->status->state = SNDRV_PCM_STATE_SUSPENDED;
1083         wake_up(&runtime->sleep);
1084         wake_up(&runtime->tsleep);
1085 }
1086
1087 static struct action_ops snd_pcm_action_suspend = {
1088         .pre_action = snd_pcm_pre_suspend,
1089         .do_action = snd_pcm_do_suspend,
1090         .post_action = snd_pcm_post_suspend
1091 };
1092
1093 /**
1094  * snd_pcm_suspend - trigger SUSPEND to all linked streams
1095  * @substream: the PCM substream
1096  *
1097  * After this call, all streams are changed to SUSPENDED state.
1098  */
1099 int snd_pcm_suspend(struct snd_pcm_substream *substream)
1100 {
1101         int err;
1102         unsigned long flags;
1103
1104         if (! substream)
1105                 return 0;
1106
1107         snd_pcm_stream_lock_irqsave(substream, flags);
1108         err = snd_pcm_action(&snd_pcm_action_suspend, substream, 0);
1109         snd_pcm_stream_unlock_irqrestore(substream, flags);
1110         return err;
1111 }
1112
1113 EXPORT_SYMBOL(snd_pcm_suspend);
1114
1115 /**
1116  * snd_pcm_suspend_all - trigger SUSPEND to all substreams in the given pcm
1117  * @pcm: the PCM instance
1118  *
1119  * After this call, all streams are changed to SUSPENDED state.
1120  */
1121 int snd_pcm_suspend_all(struct snd_pcm *pcm)
1122 {
1123         struct snd_pcm_substream *substream;
1124         int stream, err = 0;
1125
1126         if (! pcm)
1127                 return 0;
1128
1129         for (stream = 0; stream < 2; stream++) {
1130                 for (substream = pcm->streams[stream].substream;
1131                      substream; substream = substream->next) {
1132                         /* FIXME: the open/close code should lock this as well */
1133                         if (substream->runtime == NULL)
1134                                 continue;
1135                         err = snd_pcm_suspend(substream);
1136                         if (err < 0 && err != -EBUSY)
1137                                 return err;
1138                 }
1139         }
1140         return 0;
1141 }
1142
1143 EXPORT_SYMBOL(snd_pcm_suspend_all);
1144
1145 /* resume */
1146
1147 static int snd_pcm_pre_resume(struct snd_pcm_substream *substream, int state)
1148 {
1149         struct snd_pcm_runtime *runtime = substream->runtime;
1150         if (!(runtime->info & SNDRV_PCM_INFO_RESUME))
1151                 return -ENOSYS;
1152         runtime->trigger_master = substream;
1153         return 0;
1154 }
1155
1156 static int snd_pcm_do_resume(struct snd_pcm_substream *substream, int state)
1157 {
1158         struct snd_pcm_runtime *runtime = substream->runtime;
1159         if (runtime->trigger_master != substream)
1160                 return 0;
1161         /* DMA not running previously? */
1162         if (runtime->status->suspended_state != SNDRV_PCM_STATE_RUNNING &&
1163             (runtime->status->suspended_state != SNDRV_PCM_STATE_DRAINING ||
1164              substream->stream != SNDRV_PCM_STREAM_PLAYBACK))
1165                 return 0;
1166         return substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_RESUME);
1167 }
1168
1169 static void snd_pcm_undo_resume(struct snd_pcm_substream *substream, int state)
1170 {
1171         if (substream->runtime->trigger_master == substream &&
1172             snd_pcm_running(substream))
1173                 substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_SUSPEND);
1174 }
1175
1176 static void snd_pcm_post_resume(struct snd_pcm_substream *substream, int state)
1177 {
1178         struct snd_pcm_runtime *runtime = substream->runtime;
1179         snd_pcm_trigger_tstamp(substream);
1180         if (substream->timer)
1181                 snd_timer_notify(substream->timer, SNDRV_TIMER_EVENT_MRESUME,
1182                                  &runtime->trigger_tstamp);
1183         runtime->status->state = runtime->status->suspended_state;
1184 }
1185
1186 static struct action_ops snd_pcm_action_resume = {
1187         .pre_action = snd_pcm_pre_resume,
1188         .do_action = snd_pcm_do_resume,
1189         .undo_action = snd_pcm_undo_resume,
1190         .post_action = snd_pcm_post_resume
1191 };
1192
1193 static int snd_pcm_resume(struct snd_pcm_substream *substream)
1194 {
1195         struct snd_card *card = substream->pcm->card;
1196         int res;
1197
1198         snd_power_lock(card);
1199         if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0)
1200                 res = snd_pcm_action_lock_irq(&snd_pcm_action_resume, substream, 0);
1201         snd_power_unlock(card);
1202         return res;
1203 }
1204
1205 #else
1206
1207 static int snd_pcm_resume(struct snd_pcm_substream *substream)
1208 {
1209         return -ENOSYS;
1210 }
1211
1212 #endif /* CONFIG_PM */
1213
1214 /*
1215  * xrun ioctl
1216  *
1217  * Change the RUNNING stream(s) to XRUN state.
1218  */
1219 static int snd_pcm_xrun(struct snd_pcm_substream *substream)
1220 {
1221         struct snd_card *card = substream->pcm->card;
1222         struct snd_pcm_runtime *runtime = substream->runtime;
1223         int result;
1224
1225         snd_power_lock(card);
1226         if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1227                 result = snd_power_wait(card, SNDRV_CTL_POWER_D0);
1228                 if (result < 0)
1229                         goto _unlock;
1230         }
1231
1232         snd_pcm_stream_lock_irq(substream);
1233         switch (runtime->status->state) {
1234         case SNDRV_PCM_STATE_XRUN:
1235                 result = 0;     /* already there */
1236                 break;
1237         case SNDRV_PCM_STATE_RUNNING:
1238                 result = snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
1239                 break;
1240         default:
1241                 result = -EBADFD;
1242         }
1243         snd_pcm_stream_unlock_irq(substream);
1244  _unlock:
1245         snd_power_unlock(card);
1246         return result;
1247 }
1248
1249 /*
1250  * reset ioctl
1251  */
1252 static int snd_pcm_pre_reset(struct snd_pcm_substream *substream, int state)
1253 {
1254         struct snd_pcm_runtime *runtime = substream->runtime;
1255         switch (runtime->status->state) {
1256         case SNDRV_PCM_STATE_RUNNING:
1257         case SNDRV_PCM_STATE_PREPARED:
1258         case SNDRV_PCM_STATE_PAUSED:
1259         case SNDRV_PCM_STATE_SUSPENDED:
1260                 return 0;
1261         default:
1262                 return -EBADFD;
1263         }
1264 }
1265
1266 static int snd_pcm_do_reset(struct snd_pcm_substream *substream, int state)
1267 {
1268         struct snd_pcm_runtime *runtime = substream->runtime;
1269         int err = substream->ops->ioctl(substream, SNDRV_PCM_IOCTL1_RESET, NULL);
1270         if (err < 0)
1271                 return err;
1272         runtime->hw_ptr_base = 0;
1273         runtime->hw_ptr_interrupt = runtime->status->hw_ptr -
1274                 runtime->status->hw_ptr % runtime->period_size;
1275         runtime->silence_start = runtime->status->hw_ptr;
1276         runtime->silence_filled = 0;
1277         return 0;
1278 }
1279
1280 static void snd_pcm_post_reset(struct snd_pcm_substream *substream, int state)
1281 {
1282         struct snd_pcm_runtime *runtime = substream->runtime;
1283         runtime->control->appl_ptr = runtime->status->hw_ptr;
1284         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
1285             runtime->silence_size > 0)
1286                 snd_pcm_playback_silence(substream, ULONG_MAX);
1287 }
1288
1289 static struct action_ops snd_pcm_action_reset = {
1290         .pre_action = snd_pcm_pre_reset,
1291         .do_action = snd_pcm_do_reset,
1292         .post_action = snd_pcm_post_reset
1293 };
1294
1295 static int snd_pcm_reset(struct snd_pcm_substream *substream)
1296 {
1297         return snd_pcm_action_nonatomic(&snd_pcm_action_reset, substream, 0);
1298 }
1299
1300 /*
1301  * prepare ioctl
1302  */
1303 /* we use the second argument for updating f_flags */
1304 static int snd_pcm_pre_prepare(struct snd_pcm_substream *substream,
1305                                int f_flags)
1306 {
1307         struct snd_pcm_runtime *runtime = substream->runtime;
1308         if (runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1309             runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED)
1310                 return -EBADFD;
1311         if (snd_pcm_running(substream))
1312                 return -EBUSY;
1313         substream->f_flags = f_flags;
1314         return 0;
1315 }
1316
1317 static int snd_pcm_do_prepare(struct snd_pcm_substream *substream, int state)
1318 {
1319         int err;
1320         err = substream->ops->prepare(substream);
1321         if (err < 0)
1322                 return err;
1323         return snd_pcm_do_reset(substream, 0);
1324 }
1325
1326 static void snd_pcm_post_prepare(struct snd_pcm_substream *substream, int state)
1327 {
1328         struct snd_pcm_runtime *runtime = substream->runtime;
1329         runtime->control->appl_ptr = runtime->status->hw_ptr;
1330         snd_pcm_set_state(substream, SNDRV_PCM_STATE_PREPARED);
1331 }
1332
1333 static struct action_ops snd_pcm_action_prepare = {
1334         .pre_action = snd_pcm_pre_prepare,
1335         .do_action = snd_pcm_do_prepare,
1336         .post_action = snd_pcm_post_prepare
1337 };
1338
1339 /**
1340  * snd_pcm_prepare - prepare the PCM substream to be triggerable
1341  * @substream: the PCM substream instance
1342  * @file: file to refer f_flags
1343  */
1344 static int snd_pcm_prepare(struct snd_pcm_substream *substream,
1345                            struct file *file)
1346 {
1347         int res;
1348         struct snd_card *card = substream->pcm->card;
1349         int f_flags;
1350
1351         if (file)
1352                 f_flags = file->f_flags;
1353         else
1354                 f_flags = substream->f_flags;
1355
1356         snd_power_lock(card);
1357         if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0)
1358                 res = snd_pcm_action_nonatomic(&snd_pcm_action_prepare,
1359                                                substream, f_flags);
1360         snd_power_unlock(card);
1361         return res;
1362 }
1363
1364 /*
1365  * drain ioctl
1366  */
1367
1368 static int snd_pcm_pre_drain_init(struct snd_pcm_substream *substream, int state)
1369 {
1370         substream->runtime->trigger_master = substream;
1371         return 0;
1372 }
1373
1374 static int snd_pcm_do_drain_init(struct snd_pcm_substream *substream, int state)
1375 {
1376         struct snd_pcm_runtime *runtime = substream->runtime;
1377         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
1378                 switch (runtime->status->state) {
1379                 case SNDRV_PCM_STATE_PREPARED:
1380                         /* start playback stream if possible */
1381                         if (! snd_pcm_playback_empty(substream)) {
1382                                 snd_pcm_do_start(substream, SNDRV_PCM_STATE_DRAINING);
1383                                 snd_pcm_post_start(substream, SNDRV_PCM_STATE_DRAINING);
1384                         }
1385                         break;
1386                 case SNDRV_PCM_STATE_RUNNING:
1387                         runtime->status->state = SNDRV_PCM_STATE_DRAINING;
1388                         break;
1389                 default:
1390                         break;
1391                 }
1392         } else {
1393                 /* stop running stream */
1394                 if (runtime->status->state == SNDRV_PCM_STATE_RUNNING) {
1395                         int new_state = snd_pcm_capture_avail(runtime) > 0 ?
1396                                 SNDRV_PCM_STATE_DRAINING : SNDRV_PCM_STATE_SETUP;
1397                         snd_pcm_do_stop(substream, new_state);
1398                         snd_pcm_post_stop(substream, new_state);
1399                 }
1400         }
1401         return 0;
1402 }
1403
1404 static void snd_pcm_post_drain_init(struct snd_pcm_substream *substream, int state)
1405 {
1406 }
1407
1408 static struct action_ops snd_pcm_action_drain_init = {
1409         .pre_action = snd_pcm_pre_drain_init,
1410         .do_action = snd_pcm_do_drain_init,
1411         .post_action = snd_pcm_post_drain_init
1412 };
1413
1414 static int snd_pcm_drop(struct snd_pcm_substream *substream);
1415
1416 /*
1417  * Drain the stream(s).
1418  * When the substream is linked, sync until the draining of all playback streams
1419  * is finished.
1420  * After this call, all streams are supposed to be either SETUP or DRAINING
1421  * (capture only) state.
1422  */
1423 static int snd_pcm_drain(struct snd_pcm_substream *substream,
1424                          struct file *file)
1425 {
1426         struct snd_card *card;
1427         struct snd_pcm_runtime *runtime;
1428         struct snd_pcm_substream *s;
1429         wait_queue_t wait;
1430         int result = 0;
1431         int nonblock = 0;
1432
1433         card = substream->pcm->card;
1434         runtime = substream->runtime;
1435
1436         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
1437                 return -EBADFD;
1438
1439         snd_power_lock(card);
1440         if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
1441                 result = snd_power_wait(card, SNDRV_CTL_POWER_D0);
1442                 if (result < 0) {
1443                         snd_power_unlock(card);
1444                         return result;
1445                 }
1446         }
1447
1448         if (file) {
1449                 if (file->f_flags & O_NONBLOCK)
1450                         nonblock = 1;
1451         } else if (substream->f_flags & O_NONBLOCK)
1452                 nonblock = 1;
1453
1454         down_read(&snd_pcm_link_rwsem);
1455         snd_pcm_stream_lock_irq(substream);
1456         /* resume pause */
1457         if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
1458                 snd_pcm_pause(substream, 0);
1459
1460         /* pre-start/stop - all running streams are changed to DRAINING state */
1461         result = snd_pcm_action(&snd_pcm_action_drain_init, substream, 0);
1462         if (result < 0)
1463                 goto unlock;
1464         /* in non-blocking, we don't wait in ioctl but let caller poll */
1465         if (nonblock) {
1466                 result = -EAGAIN;
1467                 goto unlock;
1468         }
1469
1470         for (;;) {
1471                 long tout;
1472                 struct snd_pcm_runtime *to_check;
1473                 if (signal_pending(current)) {
1474                         result = -ERESTARTSYS;
1475                         break;
1476                 }
1477                 /* find a substream to drain */
1478                 to_check = NULL;
1479                 snd_pcm_group_for_each_entry(s, substream) {
1480                         if (s->stream != SNDRV_PCM_STREAM_PLAYBACK)
1481                                 continue;
1482                         runtime = s->runtime;
1483                         if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
1484                                 to_check = runtime;
1485                                 break;
1486                         }
1487                 }
1488                 if (!to_check)
1489                         break; /* all drained */
1490                 init_waitqueue_entry(&wait, current);
1491                 add_wait_queue(&to_check->sleep, &wait);
1492                 snd_pcm_stream_unlock_irq(substream);
1493                 up_read(&snd_pcm_link_rwsem);
1494                 snd_power_unlock(card);
1495                 if (runtime->no_period_wakeup)
1496                         tout = MAX_SCHEDULE_TIMEOUT;
1497                 else {
1498                         tout = 10;
1499                         if (runtime->rate) {
1500                                 long t = runtime->period_size * 2 / runtime->rate;
1501                                 tout = max(t, tout);
1502                         }
1503                         tout = msecs_to_jiffies(tout * 1000);
1504                 }
1505                 tout = schedule_timeout_interruptible(tout);
1506                 snd_power_lock(card);
1507                 down_read(&snd_pcm_link_rwsem);
1508                 snd_pcm_stream_lock_irq(substream);
1509                 remove_wait_queue(&to_check->sleep, &wait);
1510                 if (card->shutdown) {
1511                         result = -ENODEV;
1512                         break;
1513                 }
1514                 if (tout == 0) {
1515                         if (substream->runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1516                                 result = -ESTRPIPE;
1517                         else {
1518                                 snd_printd("playback drain error (DMA or IRQ trouble?)\n");
1519                                 snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1520                                 result = -EIO;
1521                         }
1522                         break;
1523                 }
1524         }
1525
1526  unlock:
1527         snd_pcm_stream_unlock_irq(substream);
1528         up_read(&snd_pcm_link_rwsem);
1529         snd_power_unlock(card);
1530
1531         return result;
1532 }
1533
1534 /*
1535  * drop ioctl
1536  *
1537  * Immediately put all linked substreams into SETUP state.
1538  */
1539 static int snd_pcm_drop(struct snd_pcm_substream *substream)
1540 {
1541         struct snd_pcm_runtime *runtime;
1542         int result = 0;
1543
1544         if (PCM_RUNTIME_CHECK(substream))
1545                 return -ENXIO;
1546         runtime = substream->runtime;
1547
1548         if (runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1549             runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED ||
1550             runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
1551                 return -EBADFD;
1552
1553         snd_pcm_stream_lock_irq(substream);
1554         /* resume pause */
1555         if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
1556                 snd_pcm_pause(substream, 0);
1557
1558         snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1559         /* runtime->control->appl_ptr = runtime->status->hw_ptr; */
1560         snd_pcm_stream_unlock_irq(substream);
1561
1562         return result;
1563 }
1564
1565
1566 /* WARNING: Don't forget to fput back the file */
1567 static struct file *snd_pcm_file_fd(int fd)
1568 {
1569         struct file *file;
1570         struct inode *inode;
1571         unsigned int minor;
1572
1573         file = fget(fd);
1574         if (!file)
1575                 return NULL;
1576         inode = file->f_path.dentry->d_inode;
1577         if (!S_ISCHR(inode->i_mode) ||
1578             imajor(inode) != snd_major) {
1579                 fput(file);
1580                 return NULL;
1581         }
1582         minor = iminor(inode);
1583         if (!snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_PLAYBACK) &&
1584             !snd_lookup_minor_data(minor, SNDRV_DEVICE_TYPE_PCM_CAPTURE)) {
1585                 fput(file);
1586                 return NULL;
1587         }
1588         return file;
1589 }
1590
1591 /*
1592  * PCM link handling
1593  */
1594 static int snd_pcm_link(struct snd_pcm_substream *substream, int fd)
1595 {
1596         int res = 0;
1597         struct file *file;
1598         struct snd_pcm_file *pcm_file;
1599         struct snd_pcm_substream *substream1;
1600
1601         file = snd_pcm_file_fd(fd);
1602         if (!file)
1603                 return -EBADFD;
1604         pcm_file = file->private_data;
1605         substream1 = pcm_file->substream;
1606         down_write(&snd_pcm_link_rwsem);
1607         write_lock_irq(&snd_pcm_link_rwlock);
1608         if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN ||
1609             substream->runtime->status->state != substream1->runtime->status->state) {
1610                 res = -EBADFD;
1611                 goto _end;
1612         }
1613         if (snd_pcm_stream_linked(substream1)) {
1614                 res = -EALREADY;
1615                 goto _end;
1616         }
1617         if (!snd_pcm_stream_linked(substream)) {
1618                 substream->group = kmalloc(sizeof(struct snd_pcm_group), GFP_ATOMIC);
1619                 if (substream->group == NULL) {
1620                         res = -ENOMEM;
1621                         goto _end;
1622                 }
1623                 spin_lock_init(&substream->group->lock);
1624                 INIT_LIST_HEAD(&substream->group->substreams);
1625                 list_add_tail(&substream->link_list, &substream->group->substreams);
1626                 substream->group->count = 1;
1627         }
1628         list_add_tail(&substream1->link_list, &substream->group->substreams);
1629         substream->group->count++;
1630         substream1->group = substream->group;
1631  _end:
1632         write_unlock_irq(&snd_pcm_link_rwlock);
1633         up_write(&snd_pcm_link_rwsem);
1634         snd_card_unref(substream1->pcm->card);
1635         fput(file);
1636         return res;
1637 }
1638
1639 static void relink_to_local(struct snd_pcm_substream *substream)
1640 {
1641         substream->group = &substream->self_group;
1642         INIT_LIST_HEAD(&substream->self_group.substreams);
1643         list_add_tail(&substream->link_list, &substream->self_group.substreams);
1644 }
1645
1646 static int snd_pcm_unlink(struct snd_pcm_substream *substream)
1647 {
1648         struct snd_pcm_substream *s;
1649         int res = 0;
1650
1651         down_write(&snd_pcm_link_rwsem);
1652         write_lock_irq(&snd_pcm_link_rwlock);
1653         if (!snd_pcm_stream_linked(substream)) {
1654                 res = -EALREADY;
1655                 goto _end;
1656         }
1657         list_del(&substream->link_list);
1658         substream->group->count--;
1659         if (substream->group->count == 1) {     /* detach the last stream, too */
1660                 snd_pcm_group_for_each_entry(s, substream) {
1661                         relink_to_local(s);
1662                         break;
1663                 }
1664                 kfree(substream->group);
1665         }
1666         relink_to_local(substream);
1667        _end:
1668         write_unlock_irq(&snd_pcm_link_rwlock);
1669         up_write(&snd_pcm_link_rwsem);
1670         return res;
1671 }
1672
1673 /*
1674  * hw configurator
1675  */
1676 static int snd_pcm_hw_rule_mul(struct snd_pcm_hw_params *params,
1677                                struct snd_pcm_hw_rule *rule)
1678 {
1679         struct snd_interval t;
1680         snd_interval_mul(hw_param_interval_c(params, rule->deps[0]),
1681                      hw_param_interval_c(params, rule->deps[1]), &t);
1682         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1683 }
1684
1685 static int snd_pcm_hw_rule_div(struct snd_pcm_hw_params *params,
1686                                struct snd_pcm_hw_rule *rule)
1687 {
1688         struct snd_interval t;
1689         snd_interval_div(hw_param_interval_c(params, rule->deps[0]),
1690                      hw_param_interval_c(params, rule->deps[1]), &t);
1691         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1692 }
1693
1694 static int snd_pcm_hw_rule_muldivk(struct snd_pcm_hw_params *params,
1695                                    struct snd_pcm_hw_rule *rule)
1696 {
1697         struct snd_interval t;
1698         snd_interval_muldivk(hw_param_interval_c(params, rule->deps[0]),
1699                          hw_param_interval_c(params, rule->deps[1]),
1700                          (unsigned long) rule->private, &t);
1701         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1702 }
1703
1704 static int snd_pcm_hw_rule_mulkdiv(struct snd_pcm_hw_params *params,
1705                                    struct snd_pcm_hw_rule *rule)
1706 {
1707         struct snd_interval t;
1708         snd_interval_mulkdiv(hw_param_interval_c(params, rule->deps[0]),
1709                          (unsigned long) rule->private,
1710                          hw_param_interval_c(params, rule->deps[1]), &t);
1711         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1712 }
1713
1714 static int snd_pcm_hw_rule_format(struct snd_pcm_hw_params *params,
1715                                   struct snd_pcm_hw_rule *rule)
1716 {
1717         unsigned int k;
1718         struct snd_interval *i = hw_param_interval(params, rule->deps[0]);
1719         struct snd_mask m;
1720         struct snd_mask *mask = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1721         snd_mask_any(&m);
1722         for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
1723                 int bits;
1724                 if (! snd_mask_test(mask, k))
1725                         continue;
1726                 bits = snd_pcm_format_physical_width(k);
1727                 if (bits <= 0)
1728                         continue; /* ignore invalid formats */
1729                 if ((unsigned)bits < i->min || (unsigned)bits > i->max)
1730                         snd_mask_reset(&m, k);
1731         }
1732         return snd_mask_refine(mask, &m);
1733 }
1734
1735 static int snd_pcm_hw_rule_sample_bits(struct snd_pcm_hw_params *params,
1736                                        struct snd_pcm_hw_rule *rule)
1737 {
1738         struct snd_interval t;
1739         unsigned int k;
1740         t.min = UINT_MAX;
1741         t.max = 0;
1742         t.openmin = 0;
1743         t.openmax = 0;
1744         for (k = 0; k <= SNDRV_PCM_FORMAT_LAST; ++k) {
1745                 int bits;
1746                 if (! snd_mask_test(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT), k))
1747                         continue;
1748                 bits = snd_pcm_format_physical_width(k);
1749                 if (bits <= 0)
1750                         continue; /* ignore invalid formats */
1751                 if (t.min > (unsigned)bits)
1752                         t.min = bits;
1753                 if (t.max < (unsigned)bits)
1754                         t.max = bits;
1755         }
1756         t.integer = 1;
1757         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1758 }
1759
1760 #if SNDRV_PCM_RATE_5512 != 1 << 0 || SNDRV_PCM_RATE_192000 != 1 << 12
1761 #error "Change this table"
1762 #endif
1763
1764 static unsigned int rates[] = { 5512, 8000, 11025, 16000, 22050, 32000, 44100,
1765                                  48000, 64000, 88200, 96000, 176400, 192000 };
1766
1767 const struct snd_pcm_hw_constraint_list snd_pcm_known_rates = {
1768         .count = ARRAY_SIZE(rates),
1769         .list = rates,
1770 };
1771
1772 static int snd_pcm_hw_rule_rate(struct snd_pcm_hw_params *params,
1773                                 struct snd_pcm_hw_rule *rule)
1774 {
1775         struct snd_pcm_hardware *hw = rule->private;
1776         return snd_interval_list(hw_param_interval(params, rule->var),
1777                                  snd_pcm_known_rates.count,
1778                                  snd_pcm_known_rates.list, hw->rates);
1779 }
1780
1781 static int snd_pcm_hw_rule_buffer_bytes_max(struct snd_pcm_hw_params *params,
1782                                             struct snd_pcm_hw_rule *rule)
1783 {
1784         struct snd_interval t;
1785         struct snd_pcm_substream *substream = rule->private;
1786         t.min = 0;
1787         t.max = substream->buffer_bytes_max;
1788         t.openmin = 0;
1789         t.openmax = 0;
1790         t.integer = 1;
1791         return snd_interval_refine(hw_param_interval(params, rule->var), &t);
1792 }
1793
1794 int snd_pcm_hw_constraints_init(struct snd_pcm_substream *substream)
1795 {
1796         struct snd_pcm_runtime *runtime = substream->runtime;
1797         struct snd_pcm_hw_constraints *constrs = &runtime->hw_constraints;
1798         int k, err;
1799
1800         for (k = SNDRV_PCM_HW_PARAM_FIRST_MASK; k <= SNDRV_PCM_HW_PARAM_LAST_MASK; k++) {
1801                 snd_mask_any(constrs_mask(constrs, k));
1802         }
1803
1804         for (k = SNDRV_PCM_HW_PARAM_FIRST_INTERVAL; k <= SNDRV_PCM_HW_PARAM_LAST_INTERVAL; k++) {
1805                 snd_interval_any(constrs_interval(constrs, k));
1806         }
1807
1808         snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_CHANNELS));
1809         snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_SIZE));
1810         snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_BUFFER_BYTES));
1811         snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_SAMPLE_BITS));
1812         snd_interval_setinteger(constrs_interval(constrs, SNDRV_PCM_HW_PARAM_FRAME_BITS));
1813
1814         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT,
1815                                    snd_pcm_hw_rule_format, NULL,
1816                                    SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1817         if (err < 0)
1818                 return err;
1819         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
1820                                   snd_pcm_hw_rule_sample_bits, NULL,
1821                                   SNDRV_PCM_HW_PARAM_FORMAT,
1822                                   SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1823         if (err < 0)
1824                 return err;
1825         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_SAMPLE_BITS,
1826                                   snd_pcm_hw_rule_div, NULL,
1827                                   SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
1828         if (err < 0)
1829                 return err;
1830         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1831                                   snd_pcm_hw_rule_mul, NULL,
1832                                   SNDRV_PCM_HW_PARAM_SAMPLE_BITS, SNDRV_PCM_HW_PARAM_CHANNELS, -1);
1833         if (err < 0)
1834                 return err;
1835         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1836                                   snd_pcm_hw_rule_mulkdiv, (void*) 8,
1837                                   SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
1838         if (err < 0)
1839                 return err;
1840         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FRAME_BITS,
1841                                   snd_pcm_hw_rule_mulkdiv, (void*) 8,
1842                                   SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, -1);
1843         if (err < 0)
1844                 return err;
1845         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
1846                                   snd_pcm_hw_rule_div, NULL,
1847                                   SNDRV_PCM_HW_PARAM_FRAME_BITS, SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
1848         if (err < 0)
1849                 return err;
1850         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1851                                   snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1852                                   SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_TIME, -1);
1853         if (err < 0)
1854                 return err;
1855         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1856                                   snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1857                                   SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_BUFFER_TIME, -1);
1858         if (err < 0)
1859                 return err;
1860         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIODS,
1861                                   snd_pcm_hw_rule_div, NULL,
1862                                   SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
1863         if (err < 0)
1864                 return err;
1865         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
1866                                   snd_pcm_hw_rule_div, NULL,
1867                                   SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
1868         if (err < 0)
1869                 return err;
1870         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
1871                                   snd_pcm_hw_rule_mulkdiv, (void*) 8,
1872                                   SNDRV_PCM_HW_PARAM_PERIOD_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1873         if (err < 0)
1874                 return err;
1875         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
1876                                   snd_pcm_hw_rule_muldivk, (void*) 1000000,
1877                                   SNDRV_PCM_HW_PARAM_PERIOD_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
1878         if (err < 0)
1879                 return err;
1880         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
1881                                   snd_pcm_hw_rule_mul, NULL,
1882                                   SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_PERIODS, -1);
1883         if (err < 0)
1884                 return err;
1885         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
1886                                   snd_pcm_hw_rule_mulkdiv, (void*) 8,
1887                                   SNDRV_PCM_HW_PARAM_BUFFER_BYTES, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1888         if (err < 0)
1889                 return err;
1890         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
1891                                   snd_pcm_hw_rule_muldivk, (void*) 1000000,
1892                                   SNDRV_PCM_HW_PARAM_BUFFER_TIME, SNDRV_PCM_HW_PARAM_RATE, -1);
1893         if (err < 0)
1894                 return err;
1895         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
1896                                   snd_pcm_hw_rule_muldivk, (void*) 8,
1897                                   SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1898         if (err < 0)
1899                 return err;
1900         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
1901                                   snd_pcm_hw_rule_muldivk, (void*) 8,
1902                                   SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
1903         if (err < 0)
1904                 return err;
1905         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_TIME,
1906                                   snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1907                                   SNDRV_PCM_HW_PARAM_PERIOD_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
1908         if (err < 0)
1909                 return err;
1910         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_TIME,
1911                                   snd_pcm_hw_rule_mulkdiv, (void*) 1000000,
1912                                   SNDRV_PCM_HW_PARAM_BUFFER_SIZE, SNDRV_PCM_HW_PARAM_RATE, -1);
1913         if (err < 0)
1914                 return err;
1915         return 0;
1916 }
1917
1918 int snd_pcm_hw_constraints_complete(struct snd_pcm_substream *substream)
1919 {
1920         struct snd_pcm_runtime *runtime = substream->runtime;
1921         struct snd_pcm_hardware *hw = &runtime->hw;
1922         int err;
1923         unsigned int mask = 0;
1924
1925         if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
1926                 mask |= 1 << SNDRV_PCM_ACCESS_RW_INTERLEAVED;
1927         if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
1928                 mask |= 1 << SNDRV_PCM_ACCESS_RW_NONINTERLEAVED;
1929         if (hw->info & SNDRV_PCM_INFO_MMAP) {
1930                 if (hw->info & SNDRV_PCM_INFO_INTERLEAVED)
1931                         mask |= 1 << SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
1932                 if (hw->info & SNDRV_PCM_INFO_NONINTERLEAVED)
1933                         mask |= 1 << SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED;
1934                 if (hw->info & SNDRV_PCM_INFO_COMPLEX)
1935                         mask |= 1 << SNDRV_PCM_ACCESS_MMAP_COMPLEX;
1936         }
1937         err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_ACCESS, mask);
1938         if (err < 0)
1939                 return err;
1940
1941         err = snd_pcm_hw_constraint_mask64(runtime, SNDRV_PCM_HW_PARAM_FORMAT, hw->formats);
1942         if (err < 0)
1943                 return err;
1944
1945         err = snd_pcm_hw_constraint_mask(runtime, SNDRV_PCM_HW_PARAM_SUBFORMAT, 1 << SNDRV_PCM_SUBFORMAT_STD);
1946         if (err < 0)
1947                 return err;
1948
1949         err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_CHANNELS,
1950                                            hw->channels_min, hw->channels_max);
1951         if (err < 0)
1952                 return err;
1953
1954         err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_RATE,
1955                                            hw->rate_min, hw->rate_max);
1956         if (err < 0)
1957                 return err;
1958
1959         err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
1960                                            hw->period_bytes_min, hw->period_bytes_max);
1961         if (err < 0)
1962                 return err;
1963
1964         err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIODS,
1965                                            hw->periods_min, hw->periods_max);
1966         if (err < 0)
1967                 return err;
1968
1969         err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
1970                                            hw->period_bytes_min, hw->buffer_bytes_max);
1971         if (err < 0)
1972                 return err;
1973
1974         err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
1975                                   snd_pcm_hw_rule_buffer_bytes_max, substream,
1976                                   SNDRV_PCM_HW_PARAM_BUFFER_BYTES, -1);
1977         if (err < 0)
1978                 return err;
1979
1980         /* FIXME: remove */
1981         if (runtime->dma_bytes) {
1982                 err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 0, runtime->dma_bytes);
1983                 if (err < 0)
1984                         return -EINVAL;
1985         }
1986
1987         if (!(hw->rates & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))) {
1988                 err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
1989                                           snd_pcm_hw_rule_rate, hw,
1990                                           SNDRV_PCM_HW_PARAM_RATE, -1);
1991                 if (err < 0)
1992                         return err;
1993         }
1994
1995         /* FIXME: this belong to lowlevel */
1996         snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIOD_SIZE);
1997
1998         return 0;
1999 }
2000
2001 static void pcm_release_private(struct snd_pcm_substream *substream)
2002 {
2003         snd_pcm_unlink(substream);
2004 }
2005
2006 void snd_pcm_release_substream(struct snd_pcm_substream *substream)
2007 {
2008         substream->ref_count--;
2009         if (substream->ref_count > 0)
2010                 return;
2011
2012         snd_pcm_drop(substream);
2013         if (substream->hw_opened) {
2014                 if (substream->ops->hw_free != NULL)
2015                         substream->ops->hw_free(substream);
2016                 substream->ops->close(substream);
2017                 substream->hw_opened = 0;
2018         }
2019         if (pm_qos_request_active(&substream->latency_pm_qos_req))
2020                 pm_qos_remove_request(&substream->latency_pm_qos_req);
2021         if (substream->pcm_release) {
2022                 substream->pcm_release(substream);
2023                 substream->pcm_release = NULL;
2024         }
2025         snd_pcm_detach_substream(substream);
2026 }
2027
2028 EXPORT_SYMBOL(snd_pcm_release_substream);
2029
2030 int snd_pcm_open_substream(struct snd_pcm *pcm, int stream,
2031                            struct file *file,
2032                            struct snd_pcm_substream **rsubstream)
2033 {
2034         struct snd_pcm_substream *substream;
2035         int err;
2036
2037         err = snd_pcm_attach_substream(pcm, stream, file, &substream);
2038         if (err < 0)
2039                 return err;
2040         if (substream->ref_count > 1) {
2041                 *rsubstream = substream;
2042                 return 0;
2043         }
2044
2045         err = snd_pcm_hw_constraints_init(substream);
2046         if (err < 0) {
2047                 snd_printd("snd_pcm_hw_constraints_init failed\n");
2048                 goto error;
2049         }
2050
2051         if ((err = substream->ops->open(substream)) < 0)
2052                 goto error;
2053
2054         substream->hw_opened = 1;
2055
2056         err = snd_pcm_hw_constraints_complete(substream);
2057         if (err < 0) {
2058                 snd_printd("snd_pcm_hw_constraints_complete failed\n");
2059                 goto error;
2060         }
2061
2062         *rsubstream = substream;
2063         return 0;
2064
2065  error:
2066         snd_pcm_release_substream(substream);
2067         return err;
2068 }
2069
2070 EXPORT_SYMBOL(snd_pcm_open_substream);
2071
2072 static int snd_pcm_open_file(struct file *file,
2073                              struct snd_pcm *pcm,
2074                              int stream,
2075                              struct snd_pcm_file **rpcm_file)
2076 {
2077         struct snd_pcm_file *pcm_file;
2078         struct snd_pcm_substream *substream;
2079         int err;
2080
2081         if (rpcm_file)
2082                 *rpcm_file = NULL;
2083
2084         err = snd_pcm_open_substream(pcm, stream, file, &substream);
2085         if (err < 0)
2086                 return err;
2087
2088         pcm_file = kzalloc(sizeof(*pcm_file), GFP_KERNEL);
2089         if (pcm_file == NULL) {
2090                 snd_pcm_release_substream(substream);
2091                 return -ENOMEM;
2092         }
2093         pcm_file->substream = substream;
2094         if (substream->ref_count == 1) {
2095                 substream->file = pcm_file;
2096                 substream->pcm_release = pcm_release_private;
2097         }
2098         file->private_data = pcm_file;
2099         if (rpcm_file)
2100                 *rpcm_file = pcm_file;
2101         return 0;
2102 }
2103
2104 static int snd_pcm_playback_open(struct inode *inode, struct file *file)
2105 {
2106         struct snd_pcm *pcm;
2107         int err = nonseekable_open(inode, file);
2108         if (err < 0)
2109                 return err;
2110         pcm = snd_lookup_minor_data(iminor(inode),
2111                                     SNDRV_DEVICE_TYPE_PCM_PLAYBACK);
2112         err = snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_PLAYBACK);
2113         if (pcm)
2114                 snd_card_unref(pcm->card);
2115         return err;
2116 }
2117
2118 static int snd_pcm_capture_open(struct inode *inode, struct file *file)
2119 {
2120         struct snd_pcm *pcm;
2121         int err = nonseekable_open(inode, file);
2122         if (err < 0)
2123                 return err;
2124         pcm = snd_lookup_minor_data(iminor(inode),
2125                                     SNDRV_DEVICE_TYPE_PCM_CAPTURE);
2126         err = snd_pcm_open(file, pcm, SNDRV_PCM_STREAM_CAPTURE);
2127         if (pcm)
2128                 snd_card_unref(pcm->card);
2129         return err;
2130 }
2131
2132 static int snd_pcm_open(struct file *file, struct snd_pcm *pcm, int stream)
2133 {
2134         int err;
2135         struct snd_pcm_file *pcm_file;
2136         wait_queue_t wait;
2137
2138         if (pcm == NULL) {
2139                 err = -ENODEV;
2140                 goto __error1;
2141         }
2142         err = snd_card_file_add(pcm->card, file);
2143         if (err < 0)
2144                 goto __error1;
2145         if (!try_module_get(pcm->card->module)) {
2146                 err = -EFAULT;
2147                 goto __error2;
2148         }
2149         init_waitqueue_entry(&wait, current);
2150         add_wait_queue(&pcm->open_wait, &wait);
2151         mutex_lock(&pcm->open_mutex);
2152         while (1) {
2153                 err = snd_pcm_open_file(file, pcm, stream, &pcm_file);
2154                 if (err >= 0)
2155                         break;
2156                 if (err == -EAGAIN) {
2157                         if (file->f_flags & O_NONBLOCK) {
2158                                 err = -EBUSY;
2159                                 break;
2160                         }
2161                 } else
2162                         break;
2163                 set_current_state(TASK_INTERRUPTIBLE);
2164                 mutex_unlock(&pcm->open_mutex);
2165                 schedule();
2166                 mutex_lock(&pcm->open_mutex);
2167                 if (pcm->card->shutdown) {
2168                         err = -ENODEV;
2169                         break;
2170                 }
2171                 if (signal_pending(current)) {
2172                         err = -ERESTARTSYS;
2173                         break;
2174                 }
2175         }
2176         remove_wait_queue(&pcm->open_wait, &wait);
2177         mutex_unlock(&pcm->open_mutex);
2178         if (err < 0)
2179                 goto __error;
2180         return err;
2181
2182       __error:
2183         module_put(pcm->card->module);
2184       __error2:
2185         snd_card_file_remove(pcm->card, file);
2186       __error1:
2187         return err;
2188 }
2189
2190 static int snd_pcm_release(struct inode *inode, struct file *file)
2191 {
2192         struct snd_pcm *pcm;
2193         struct snd_pcm_substream *substream;
2194         struct snd_pcm_file *pcm_file;
2195
2196         pcm_file = file->private_data;
2197         substream = pcm_file->substream;
2198         if (snd_BUG_ON(!substream))
2199                 return -ENXIO;
2200         pcm = substream->pcm;
2201         mutex_lock(&pcm->open_mutex);
2202         snd_pcm_release_substream(substream);
2203         kfree(pcm_file);
2204         mutex_unlock(&pcm->open_mutex);
2205         wake_up(&pcm->open_wait);
2206         module_put(pcm->card->module);
2207         snd_card_file_remove(pcm->card, file);
2208         return 0;
2209 }
2210
2211 static snd_pcm_sframes_t snd_pcm_playback_rewind(struct snd_pcm_substream *substream,
2212                                                  snd_pcm_uframes_t frames)
2213 {
2214         struct snd_pcm_runtime *runtime = substream->runtime;
2215         snd_pcm_sframes_t appl_ptr;
2216         snd_pcm_sframes_t ret;
2217         snd_pcm_sframes_t hw_avail;
2218
2219         if (frames == 0)
2220                 return 0;
2221
2222         snd_pcm_stream_lock_irq(substream);
2223         switch (runtime->status->state) {
2224         case SNDRV_PCM_STATE_PREPARED:
2225                 break;
2226         case SNDRV_PCM_STATE_DRAINING:
2227         case SNDRV_PCM_STATE_RUNNING:
2228                 if (snd_pcm_update_hw_ptr(substream) >= 0)
2229                         break;
2230                 /* Fall through */
2231         case SNDRV_PCM_STATE_XRUN:
2232                 ret = -EPIPE;
2233                 goto __end;
2234         case SNDRV_PCM_STATE_SUSPENDED:
2235                 ret = -ESTRPIPE;
2236                 goto __end;
2237         default:
2238                 ret = -EBADFD;
2239                 goto __end;
2240         }
2241
2242         hw_avail = snd_pcm_playback_hw_avail(runtime);
2243         if (hw_avail <= 0) {
2244                 ret = 0;
2245                 goto __end;
2246         }
2247         if (frames > (snd_pcm_uframes_t)hw_avail)
2248                 frames = hw_avail;
2249         appl_ptr = runtime->control->appl_ptr - frames;
2250         if (appl_ptr < 0)
2251                 appl_ptr += runtime->boundary;
2252         runtime->control->appl_ptr = appl_ptr;
2253         ret = frames;
2254  __end:
2255         snd_pcm_stream_unlock_irq(substream);
2256         return ret;
2257 }
2258
2259 static snd_pcm_sframes_t snd_pcm_capture_rewind(struct snd_pcm_substream *substream,
2260                                                 snd_pcm_uframes_t frames)
2261 {
2262         struct snd_pcm_runtime *runtime = substream->runtime;
2263         snd_pcm_sframes_t appl_ptr;
2264         snd_pcm_sframes_t ret;
2265         snd_pcm_sframes_t hw_avail;
2266
2267         if (frames == 0)
2268                 return 0;
2269
2270         snd_pcm_stream_lock_irq(substream);
2271         switch (runtime->status->state) {
2272         case SNDRV_PCM_STATE_PREPARED:
2273         case SNDRV_PCM_STATE_DRAINING:
2274                 break;
2275         case SNDRV_PCM_STATE_RUNNING:
2276                 if (snd_pcm_update_hw_ptr(substream) >= 0)
2277                         break;
2278                 /* Fall through */
2279         case SNDRV_PCM_STATE_XRUN:
2280                 ret = -EPIPE;
2281                 goto __end;
2282         case SNDRV_PCM_STATE_SUSPENDED:
2283                 ret = -ESTRPIPE;
2284                 goto __end;
2285         default:
2286                 ret = -EBADFD;
2287                 goto __end;
2288         }
2289
2290         hw_avail = snd_pcm_capture_hw_avail(runtime);
2291         if (hw_avail <= 0) {
2292                 ret = 0;
2293                 goto __end;
2294         }
2295         if (frames > (snd_pcm_uframes_t)hw_avail)
2296                 frames = hw_avail;
2297         appl_ptr = runtime->control->appl_ptr - frames;
2298         if (appl_ptr < 0)
2299                 appl_ptr += runtime->boundary;
2300         runtime->control->appl_ptr = appl_ptr;
2301         ret = frames;
2302  __end:
2303         snd_pcm_stream_unlock_irq(substream);
2304         return ret;
2305 }
2306
2307 static snd_pcm_sframes_t snd_pcm_playback_forward(struct snd_pcm_substream *substream,
2308                                                   snd_pcm_uframes_t frames)
2309 {
2310         struct snd_pcm_runtime *runtime = substream->runtime;
2311         snd_pcm_sframes_t appl_ptr;
2312         snd_pcm_sframes_t ret;
2313         snd_pcm_sframes_t avail;
2314
2315         if (frames == 0)
2316                 return 0;
2317
2318         snd_pcm_stream_lock_irq(substream);
2319         switch (runtime->status->state) {
2320         case SNDRV_PCM_STATE_PREPARED:
2321         case SNDRV_PCM_STATE_PAUSED:
2322                 break;
2323         case SNDRV_PCM_STATE_DRAINING:
2324         case SNDRV_PCM_STATE_RUNNING:
2325                 if (snd_pcm_update_hw_ptr(substream) >= 0)
2326                         break;
2327                 /* Fall through */
2328         case SNDRV_PCM_STATE_XRUN:
2329                 ret = -EPIPE;
2330                 goto __end;
2331         case SNDRV_PCM_STATE_SUSPENDED:
2332                 ret = -ESTRPIPE;
2333                 goto __end;
2334         default:
2335                 ret = -EBADFD;
2336                 goto __end;
2337         }
2338
2339         avail = snd_pcm_playback_avail(runtime);
2340         if (avail <= 0) {
2341                 ret = 0;
2342                 goto __end;
2343         }
2344         if (frames > (snd_pcm_uframes_t)avail)
2345                 frames = avail;
2346         appl_ptr = runtime->control->appl_ptr + frames;
2347         if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary)
2348                 appl_ptr -= runtime->boundary;
2349         runtime->control->appl_ptr = appl_ptr;
2350         ret = frames;
2351  __end:
2352         snd_pcm_stream_unlock_irq(substream);
2353         return ret;
2354 }
2355
2356 static snd_pcm_sframes_t snd_pcm_capture_forward(struct snd_pcm_substream *substream,
2357                                                  snd_pcm_uframes_t frames)
2358 {
2359         struct snd_pcm_runtime *runtime = substream->runtime;
2360         snd_pcm_sframes_t appl_ptr;
2361         snd_pcm_sframes_t ret;
2362         snd_pcm_sframes_t avail;
2363
2364         if (frames == 0)
2365                 return 0;
2366
2367         snd_pcm_stream_lock_irq(substream);
2368         switch (runtime->status->state) {
2369         case SNDRV_PCM_STATE_PREPARED:
2370         case SNDRV_PCM_STATE_DRAINING:
2371         case SNDRV_PCM_STATE_PAUSED:
2372                 break;
2373         case SNDRV_PCM_STATE_RUNNING:
2374                 if (snd_pcm_update_hw_ptr(substream) >= 0)
2375                         break;
2376                 /* Fall through */
2377         case SNDRV_PCM_STATE_XRUN:
2378                 ret = -EPIPE;
2379                 goto __end;
2380         case SNDRV_PCM_STATE_SUSPENDED:
2381                 ret = -ESTRPIPE;
2382                 goto __end;
2383         default:
2384                 ret = -EBADFD;
2385                 goto __end;
2386         }
2387
2388         avail = snd_pcm_capture_avail(runtime);
2389         if (avail <= 0) {
2390                 ret = 0;
2391                 goto __end;
2392         }
2393         if (frames > (snd_pcm_uframes_t)avail)
2394                 frames = avail;
2395         appl_ptr = runtime->control->appl_ptr + frames;
2396         if (appl_ptr >= (snd_pcm_sframes_t)runtime->boundary)
2397                 appl_ptr -= runtime->boundary;
2398         runtime->control->appl_ptr = appl_ptr;
2399         ret = frames;
2400  __end:
2401         snd_pcm_stream_unlock_irq(substream);
2402         return ret;
2403 }
2404
2405 static int snd_pcm_hwsync(struct snd_pcm_substream *substream)
2406 {
2407         struct snd_pcm_runtime *runtime = substream->runtime;
2408         int err;
2409
2410         snd_pcm_stream_lock_irq(substream);
2411         switch (runtime->status->state) {
2412         case SNDRV_PCM_STATE_DRAINING:
2413                 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
2414                         goto __badfd;
2415         case SNDRV_PCM_STATE_RUNNING:
2416                 if ((err = snd_pcm_update_hw_ptr(substream)) < 0)
2417                         break;
2418                 /* Fall through */
2419         case SNDRV_PCM_STATE_PREPARED:
2420         case SNDRV_PCM_STATE_SUSPENDED:
2421                 err = 0;
2422                 break;
2423         case SNDRV_PCM_STATE_XRUN:
2424                 err = -EPIPE;
2425                 break;
2426         default:
2427               __badfd:
2428                 err = -EBADFD;
2429                 break;
2430         }
2431         snd_pcm_stream_unlock_irq(substream);
2432         return err;
2433 }
2434
2435 static int snd_pcm_delay(struct snd_pcm_substream *substream,
2436                          snd_pcm_sframes_t __user *res)
2437 {
2438         struct snd_pcm_runtime *runtime = substream->runtime;
2439         int err;
2440         snd_pcm_sframes_t n = 0;
2441
2442         snd_pcm_stream_lock_irq(substream);
2443         switch (runtime->status->state) {
2444         case SNDRV_PCM_STATE_DRAINING:
2445                 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
2446                         goto __badfd;
2447         case SNDRV_PCM_STATE_RUNNING:
2448                 if ((err = snd_pcm_update_hw_ptr(substream)) < 0)
2449                         break;
2450                 /* Fall through */
2451         case SNDRV_PCM_STATE_PREPARED:
2452         case SNDRV_PCM_STATE_SUSPENDED:
2453                 err = 0;
2454                 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
2455                         n = snd_pcm_playback_hw_avail(runtime);
2456                 else
2457                         n = snd_pcm_capture_avail(runtime);
2458                 n += runtime->delay;
2459                 break;
2460         case SNDRV_PCM_STATE_XRUN:
2461                 err = -EPIPE;
2462                 break;
2463         default:
2464               __badfd:
2465                 err = -EBADFD;
2466                 break;
2467         }
2468         snd_pcm_stream_unlock_irq(substream);
2469         if (!err)
2470                 if (put_user(n, res))
2471                         err = -EFAULT;
2472         return err;
2473 }
2474
2475 static int snd_pcm_sync_ptr(struct snd_pcm_substream *substream,
2476                             struct snd_pcm_sync_ptr __user *_sync_ptr)
2477 {
2478         struct snd_pcm_runtime *runtime = substream->runtime;
2479         struct snd_pcm_sync_ptr sync_ptr;
2480         volatile struct snd_pcm_mmap_status *status;
2481         volatile struct snd_pcm_mmap_control *control;
2482         int err;
2483
2484         memset(&sync_ptr, 0, sizeof(sync_ptr));
2485         if (get_user(sync_ptr.flags, (unsigned __user *)&(_sync_ptr->flags)))
2486                 return -EFAULT;
2487         if (copy_from_user(&sync_ptr.c.control, &(_sync_ptr->c.control), sizeof(struct snd_pcm_mmap_control)))
2488                 return -EFAULT;
2489         status = runtime->status;
2490         control = runtime->control;
2491         if (sync_ptr.flags & SNDRV_PCM_SYNC_PTR_HWSYNC) {
2492                 err = snd_pcm_hwsync(substream);
2493                 if (err < 0)
2494                         return err;
2495         }
2496         snd_pcm_stream_lock_irq(substream);
2497         if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_APPL))
2498                 control->appl_ptr = sync_ptr.c.control.appl_ptr;
2499         else
2500                 sync_ptr.c.control.appl_ptr = control->appl_ptr;
2501         if (!(sync_ptr.flags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN))
2502                 control->avail_min = sync_ptr.c.control.avail_min;
2503         else
2504                 sync_ptr.c.control.avail_min = control->avail_min;
2505         sync_ptr.s.status.state = status->state;
2506         sync_ptr.s.status.hw_ptr = status->hw_ptr;
2507         sync_ptr.s.status.tstamp = status->tstamp;
2508         sync_ptr.s.status.suspended_state = status->suspended_state;
2509         snd_pcm_stream_unlock_irq(substream);
2510         if (copy_to_user(_sync_ptr, &sync_ptr, sizeof(sync_ptr)))
2511                 return -EFAULT;
2512         return 0;
2513 }
2514
2515 static int snd_pcm_tstamp(struct snd_pcm_substream *substream, int __user *_arg)
2516 {
2517         struct snd_pcm_runtime *runtime = substream->runtime;
2518         int arg;
2519
2520         if (get_user(arg, _arg))
2521                 return -EFAULT;
2522         if (arg < 0 || arg > SNDRV_PCM_TSTAMP_TYPE_LAST)
2523                 return -EINVAL;
2524         runtime->tstamp_type = SNDRV_PCM_TSTAMP_TYPE_GETTIMEOFDAY;
2525         if (arg == SNDRV_PCM_TSTAMP_TYPE_MONOTONIC)
2526                 runtime->tstamp_type = SNDRV_PCM_TSTAMP_TYPE_MONOTONIC;
2527         return 0;
2528 }
2529
2530 static int snd_pcm_common_ioctl1(struct file *file,
2531                                  struct snd_pcm_substream *substream,
2532                                  unsigned int cmd, void __user *arg)
2533 {
2534         switch (cmd) {
2535         case SNDRV_PCM_IOCTL_PVERSION:
2536                 return put_user(SNDRV_PCM_VERSION, (int __user *)arg) ? -EFAULT : 0;
2537         case SNDRV_PCM_IOCTL_INFO:
2538                 return snd_pcm_info_user(substream, arg);
2539         case SNDRV_PCM_IOCTL_TSTAMP:    /* just for compatibility */
2540                 return 0;
2541         case SNDRV_PCM_IOCTL_TTSTAMP:
2542                 return snd_pcm_tstamp(substream, arg);
2543         case SNDRV_PCM_IOCTL_HW_REFINE:
2544                 return snd_pcm_hw_refine_user(substream, arg);
2545         case SNDRV_PCM_IOCTL_HW_PARAMS:
2546                 return snd_pcm_hw_params_user(substream, arg);
2547         case SNDRV_PCM_IOCTL_HW_FREE:
2548                 return snd_pcm_hw_free(substream);
2549         case SNDRV_PCM_IOCTL_SW_PARAMS:
2550                 return snd_pcm_sw_params_user(substream, arg);
2551         case SNDRV_PCM_IOCTL_STATUS:
2552                 return snd_pcm_status_user(substream, arg);
2553         case SNDRV_PCM_IOCTL_CHANNEL_INFO:
2554                 return snd_pcm_channel_info_user(substream, arg);
2555         case SNDRV_PCM_IOCTL_PREPARE:
2556                 return snd_pcm_prepare(substream, file);
2557         case SNDRV_PCM_IOCTL_RESET:
2558                 return snd_pcm_reset(substream);
2559         case SNDRV_PCM_IOCTL_START:
2560                 return snd_pcm_action_lock_irq(&snd_pcm_action_start, substream, SNDRV_PCM_STATE_RUNNING);
2561         case SNDRV_PCM_IOCTL_LINK:
2562                 return snd_pcm_link(substream, (int)(unsigned long) arg);
2563         case SNDRV_PCM_IOCTL_UNLINK:
2564                 return snd_pcm_unlink(substream);
2565         case SNDRV_PCM_IOCTL_RESUME:
2566                 return snd_pcm_resume(substream);
2567         case SNDRV_PCM_IOCTL_XRUN:
2568                 return snd_pcm_xrun(substream);
2569         case SNDRV_PCM_IOCTL_HWSYNC:
2570                 return snd_pcm_hwsync(substream);
2571         case SNDRV_PCM_IOCTL_DELAY:
2572                 return snd_pcm_delay(substream, arg);
2573         case SNDRV_PCM_IOCTL_SYNC_PTR:
2574                 return snd_pcm_sync_ptr(substream, arg);
2575 #ifdef CONFIG_SND_SUPPORT_OLD_API
2576         case SNDRV_PCM_IOCTL_HW_REFINE_OLD:
2577                 return snd_pcm_hw_refine_old_user(substream, arg);
2578         case SNDRV_PCM_IOCTL_HW_PARAMS_OLD:
2579                 return snd_pcm_hw_params_old_user(substream, arg);
2580 #endif
2581         case SNDRV_PCM_IOCTL_DRAIN:
2582                 return snd_pcm_drain(substream, file);
2583         case SNDRV_PCM_IOCTL_DROP:
2584                 return snd_pcm_drop(substream);
2585         case SNDRV_PCM_IOCTL_PAUSE:
2586         {
2587                 int res;
2588                 snd_pcm_stream_lock_irq(substream);
2589                 res = snd_pcm_pause(substream, (int)(unsigned long)arg);
2590                 snd_pcm_stream_unlock_irq(substream);
2591                 return res;
2592         }
2593         }
2594         snd_printd("unknown ioctl = 0x%x\n", cmd);
2595         return -ENOTTY;
2596 }
2597
2598 static int snd_pcm_playback_ioctl1(struct file *file,
2599                                    struct snd_pcm_substream *substream,
2600                                    unsigned int cmd, void __user *arg)
2601 {
2602         if (snd_BUG_ON(!substream))
2603                 return -ENXIO;
2604         if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_PLAYBACK))
2605                 return -EINVAL;
2606         switch (cmd) {
2607         case SNDRV_PCM_IOCTL_WRITEI_FRAMES:
2608         {
2609                 struct snd_xferi xferi;
2610                 struct snd_xferi __user *_xferi = arg;
2611                 struct snd_pcm_runtime *runtime = substream->runtime;
2612                 snd_pcm_sframes_t result;
2613                 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2614                         return -EBADFD;
2615                 if (put_user(0, &_xferi->result))
2616                         return -EFAULT;
2617                 if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
2618                         return -EFAULT;
2619                 result = snd_pcm_lib_write(substream, xferi.buf, xferi.frames);
2620                 __put_user(result, &_xferi->result);
2621                 return result < 0 ? result : 0;
2622         }
2623         case SNDRV_PCM_IOCTL_WRITEN_FRAMES:
2624         {
2625                 struct snd_xfern xfern;
2626                 struct snd_xfern __user *_xfern = arg;
2627                 struct snd_pcm_runtime *runtime = substream->runtime;
2628                 void __user **bufs;
2629                 snd_pcm_sframes_t result;
2630                 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2631                         return -EBADFD;
2632                 if (runtime->channels > 128)
2633                         return -EINVAL;
2634                 if (put_user(0, &_xfern->result))
2635                         return -EFAULT;
2636                 if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
2637                         return -EFAULT;
2638
2639                 bufs = memdup_user(xfern.bufs,
2640                                    sizeof(void *) * runtime->channels);
2641                 if (IS_ERR(bufs))
2642                         return PTR_ERR(bufs);
2643                 result = snd_pcm_lib_writev(substream, bufs, xfern.frames);
2644                 kfree(bufs);
2645                 __put_user(result, &_xfern->result);
2646                 return result < 0 ? result : 0;
2647         }
2648         case SNDRV_PCM_IOCTL_REWIND:
2649         {
2650                 snd_pcm_uframes_t frames;
2651                 snd_pcm_uframes_t __user *_frames = arg;
2652                 snd_pcm_sframes_t result;
2653                 if (get_user(frames, _frames))
2654                         return -EFAULT;
2655                 if (put_user(0, _frames))
2656                         return -EFAULT;
2657                 result = snd_pcm_playback_rewind(substream, frames);
2658                 __put_user(result, _frames);
2659                 return result < 0 ? result : 0;
2660         }
2661         case SNDRV_PCM_IOCTL_FORWARD:
2662         {
2663                 snd_pcm_uframes_t frames;
2664                 snd_pcm_uframes_t __user *_frames = arg;
2665                 snd_pcm_sframes_t result;
2666                 if (get_user(frames, _frames))
2667                         return -EFAULT;
2668                 if (put_user(0, _frames))
2669                         return -EFAULT;
2670                 result = snd_pcm_playback_forward(substream, frames);
2671                 __put_user(result, _frames);
2672                 return result < 0 ? result : 0;
2673         }
2674         }
2675         return snd_pcm_common_ioctl1(file, substream, cmd, arg);
2676 }
2677
2678 static int snd_pcm_capture_ioctl1(struct file *file,
2679                                   struct snd_pcm_substream *substream,
2680                                   unsigned int cmd, void __user *arg)
2681 {
2682         if (snd_BUG_ON(!substream))
2683                 return -ENXIO;
2684         if (snd_BUG_ON(substream->stream != SNDRV_PCM_STREAM_CAPTURE))
2685                 return -EINVAL;
2686         switch (cmd) {
2687         case SNDRV_PCM_IOCTL_READI_FRAMES:
2688         {
2689                 struct snd_xferi xferi;
2690                 struct snd_xferi __user *_xferi = arg;
2691                 struct snd_pcm_runtime *runtime = substream->runtime;
2692                 snd_pcm_sframes_t result;
2693                 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2694                         return -EBADFD;
2695                 if (put_user(0, &_xferi->result))
2696                         return -EFAULT;
2697                 if (copy_from_user(&xferi, _xferi, sizeof(xferi)))
2698                         return -EFAULT;
2699                 result = snd_pcm_lib_read(substream, xferi.buf, xferi.frames);
2700                 __put_user(result, &_xferi->result);
2701                 return result < 0 ? result : 0;
2702         }
2703         case SNDRV_PCM_IOCTL_READN_FRAMES:
2704         {
2705                 struct snd_xfern xfern;
2706                 struct snd_xfern __user *_xfern = arg;
2707                 struct snd_pcm_runtime *runtime = substream->runtime;
2708                 void *bufs;
2709                 snd_pcm_sframes_t result;
2710                 if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2711                         return -EBADFD;
2712                 if (runtime->channels > 128)
2713                         return -EINVAL;
2714                 if (put_user(0, &_xfern->result))
2715                         return -EFAULT;
2716                 if (copy_from_user(&xfern, _xfern, sizeof(xfern)))
2717                         return -EFAULT;
2718
2719                 bufs = memdup_user(xfern.bufs,
2720                                    sizeof(void *) * runtime->channels);
2721                 if (IS_ERR(bufs))
2722                         return PTR_ERR(bufs);
2723                 result = snd_pcm_lib_readv(substream, bufs, xfern.frames);
2724                 kfree(bufs);
2725                 __put_user(result, &_xfern->result);
2726                 return result < 0 ? result : 0;
2727         }
2728         case SNDRV_PCM_IOCTL_REWIND:
2729         {
2730                 snd_pcm_uframes_t frames;
2731                 snd_pcm_uframes_t __user *_frames = arg;
2732                 snd_pcm_sframes_t result;
2733                 if (get_user(frames, _frames))
2734                         return -EFAULT;
2735                 if (put_user(0, _frames))
2736                         return -EFAULT;
2737                 result = snd_pcm_capture_rewind(substream, frames);
2738                 __put_user(result, _frames);
2739                 return result < 0 ? result : 0;
2740         }
2741         case SNDRV_PCM_IOCTL_FORWARD:
2742         {
2743                 snd_pcm_uframes_t frames;
2744                 snd_pcm_uframes_t __user *_frames = arg;
2745                 snd_pcm_sframes_t result;
2746                 if (get_user(frames, _frames))
2747                         return -EFAULT;
2748                 if (put_user(0, _frames))
2749                         return -EFAULT;
2750                 result = snd_pcm_capture_forward(substream, frames);
2751                 __put_user(result, _frames);
2752                 return result < 0 ? result : 0;
2753         }
2754         }
2755         return snd_pcm_common_ioctl1(file, substream, cmd, arg);
2756 }
2757
2758 static long snd_pcm_playback_ioctl(struct file *file, unsigned int cmd,
2759                                    unsigned long arg)
2760 {
2761         struct snd_pcm_file *pcm_file;
2762
2763         pcm_file = file->private_data;
2764
2765         if (((cmd >> 8) & 0xff) != 'A')
2766                 return -ENOTTY;
2767
2768         return snd_pcm_playback_ioctl1(file, pcm_file->substream, cmd,
2769                                        (void __user *)arg);
2770 }
2771
2772 static long snd_pcm_capture_ioctl(struct file *file, unsigned int cmd,
2773                                   unsigned long arg)
2774 {
2775         struct snd_pcm_file *pcm_file;
2776
2777         pcm_file = file->private_data;
2778
2779         if (((cmd >> 8) & 0xff) != 'A')
2780                 return -ENOTTY;
2781
2782         return snd_pcm_capture_ioctl1(file, pcm_file->substream, cmd,
2783                                       (void __user *)arg);
2784 }
2785
2786 int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream,
2787                          unsigned int cmd, void *arg)
2788 {
2789         mm_segment_t fs;
2790         int result;
2791
2792         fs = snd_enter_user();
2793         switch (substream->stream) {
2794         case SNDRV_PCM_STREAM_PLAYBACK:
2795                 result = snd_pcm_playback_ioctl1(NULL, substream, cmd,
2796                                                  (void __user *)arg);
2797                 break;
2798         case SNDRV_PCM_STREAM_CAPTURE:
2799                 result = snd_pcm_capture_ioctl1(NULL, substream, cmd,
2800                                                 (void __user *)arg);
2801                 break;
2802         default:
2803                 result = -EINVAL;
2804                 break;
2805         }
2806         snd_leave_user(fs);
2807         return result;
2808 }
2809
2810 EXPORT_SYMBOL(snd_pcm_kernel_ioctl);
2811
2812 static ssize_t snd_pcm_read(struct file *file, char __user *buf, size_t count,
2813                             loff_t * offset)
2814 {
2815         struct snd_pcm_file *pcm_file;
2816         struct snd_pcm_substream *substream;
2817         struct snd_pcm_runtime *runtime;
2818         snd_pcm_sframes_t result;
2819
2820         pcm_file = file->private_data;
2821         substream = pcm_file->substream;
2822         if (PCM_RUNTIME_CHECK(substream))
2823                 return -ENXIO;
2824         runtime = substream->runtime;
2825         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2826                 return -EBADFD;
2827         if (!frame_aligned(runtime, count))
2828                 return -EINVAL;
2829         count = bytes_to_frames(runtime, count);
2830         result = snd_pcm_lib_read(substream, buf, count);
2831         if (result > 0)
2832                 result = frames_to_bytes(runtime, result);
2833         return result;
2834 }
2835
2836 static ssize_t snd_pcm_write(struct file *file, const char __user *buf,
2837                              size_t count, loff_t * offset)
2838 {
2839         struct snd_pcm_file *pcm_file;
2840         struct snd_pcm_substream *substream;
2841         struct snd_pcm_runtime *runtime;
2842         snd_pcm_sframes_t result;
2843
2844         pcm_file = file->private_data;
2845         substream = pcm_file->substream;
2846         if (PCM_RUNTIME_CHECK(substream))
2847                 return -ENXIO;
2848         runtime = substream->runtime;
2849         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2850                 return -EBADFD;
2851         if (!frame_aligned(runtime, count))
2852                 return -EINVAL;
2853         count = bytes_to_frames(runtime, count);
2854         result = snd_pcm_lib_write(substream, buf, count);
2855         if (result > 0)
2856                 result = frames_to_bytes(runtime, result);
2857         return result;
2858 }
2859
2860 static ssize_t snd_pcm_aio_read(struct kiocb *iocb, const struct iovec *iov,
2861                              unsigned long nr_segs, loff_t pos)
2862
2863 {
2864         struct snd_pcm_file *pcm_file;
2865         struct snd_pcm_substream *substream;
2866         struct snd_pcm_runtime *runtime;
2867         snd_pcm_sframes_t result;
2868         unsigned long i;
2869         void __user **bufs;
2870         snd_pcm_uframes_t frames;
2871
2872         pcm_file = iocb->ki_filp->private_data;
2873         substream = pcm_file->substream;
2874         if (PCM_RUNTIME_CHECK(substream))
2875                 return -ENXIO;
2876         runtime = substream->runtime;
2877         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2878                 return -EBADFD;
2879         if (nr_segs > 1024 || nr_segs != runtime->channels)
2880                 return -EINVAL;
2881         if (!frame_aligned(runtime, iov->iov_len))
2882                 return -EINVAL;
2883         frames = bytes_to_samples(runtime, iov->iov_len);
2884         bufs = kmalloc(sizeof(void *) * nr_segs, GFP_KERNEL);
2885         if (bufs == NULL)
2886                 return -ENOMEM;
2887         for (i = 0; i < nr_segs; ++i)
2888                 bufs[i] = iov[i].iov_base;
2889         result = snd_pcm_lib_readv(substream, bufs, frames);
2890         if (result > 0)
2891                 result = frames_to_bytes(runtime, result);
2892         kfree(bufs);
2893         return result;
2894 }
2895
2896 static ssize_t snd_pcm_aio_write(struct kiocb *iocb, const struct iovec *iov,
2897                               unsigned long nr_segs, loff_t pos)
2898 {
2899         struct snd_pcm_file *pcm_file;
2900         struct snd_pcm_substream *substream;
2901         struct snd_pcm_runtime *runtime;
2902         snd_pcm_sframes_t result;
2903         unsigned long i;
2904         void __user **bufs;
2905         snd_pcm_uframes_t frames;
2906
2907         pcm_file = iocb->ki_filp->private_data;
2908         substream = pcm_file->substream;
2909         if (PCM_RUNTIME_CHECK(substream))
2910                 return -ENXIO;
2911         runtime = substream->runtime;
2912         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
2913                 return -EBADFD;
2914         if (nr_segs > 128 || nr_segs != runtime->channels ||
2915             !frame_aligned(runtime, iov->iov_len))
2916                 return -EINVAL;
2917         frames = bytes_to_samples(runtime, iov->iov_len);
2918         bufs = kmalloc(sizeof(void *) * nr_segs, GFP_KERNEL);
2919         if (bufs == NULL)
2920                 return -ENOMEM;
2921         for (i = 0; i < nr_segs; ++i)
2922                 bufs[i] = iov[i].iov_base;
2923         result = snd_pcm_lib_writev(substream, bufs, frames);
2924         if (result > 0)
2925                 result = frames_to_bytes(runtime, result);
2926         kfree(bufs);
2927         return result;
2928 }
2929
2930 static unsigned int snd_pcm_playback_poll(struct file *file, poll_table * wait)
2931 {
2932         struct snd_pcm_file *pcm_file;
2933         struct snd_pcm_substream *substream;
2934         struct snd_pcm_runtime *runtime;
2935         unsigned int mask;
2936         snd_pcm_uframes_t avail;
2937
2938         pcm_file = file->private_data;
2939
2940         substream = pcm_file->substream;
2941         if (PCM_RUNTIME_CHECK(substream))
2942                 return -ENXIO;
2943         runtime = substream->runtime;
2944
2945         poll_wait(file, &runtime->sleep, wait);
2946
2947         snd_pcm_stream_lock_irq(substream);
2948         avail = snd_pcm_playback_avail(runtime);
2949         switch (runtime->status->state) {
2950         case SNDRV_PCM_STATE_RUNNING:
2951         case SNDRV_PCM_STATE_PREPARED:
2952         case SNDRV_PCM_STATE_PAUSED:
2953                 if (avail >= runtime->control->avail_min) {
2954                         mask = POLLOUT | POLLWRNORM;
2955                         break;
2956                 }
2957                 /* Fall through */
2958         case SNDRV_PCM_STATE_DRAINING:
2959                 mask = 0;
2960                 break;
2961         default:
2962                 mask = POLLOUT | POLLWRNORM | POLLERR;
2963                 break;
2964         }
2965         snd_pcm_stream_unlock_irq(substream);
2966         return mask;
2967 }
2968
2969 static unsigned int snd_pcm_capture_poll(struct file *file, poll_table * wait)
2970 {
2971         struct snd_pcm_file *pcm_file;
2972         struct snd_pcm_substream *substream;
2973         struct snd_pcm_runtime *runtime;
2974         unsigned int mask;
2975         snd_pcm_uframes_t avail;
2976
2977         pcm_file = file->private_data;
2978
2979         substream = pcm_file->substream;
2980         if (PCM_RUNTIME_CHECK(substream))
2981                 return -ENXIO;
2982         runtime = substream->runtime;
2983
2984         poll_wait(file, &runtime->sleep, wait);
2985
2986         snd_pcm_stream_lock_irq(substream);
2987         avail = snd_pcm_capture_avail(runtime);
2988         switch (runtime->status->state) {
2989         case SNDRV_PCM_STATE_RUNNING:
2990         case SNDRV_PCM_STATE_PREPARED:
2991         case SNDRV_PCM_STATE_PAUSED:
2992                 if (avail >= runtime->control->avail_min) {
2993                         mask = POLLIN | POLLRDNORM;
2994                         break;
2995                 }
2996                 mask = 0;
2997                 break;
2998         case SNDRV_PCM_STATE_DRAINING:
2999                 if (avail > 0) {
3000                         mask = POLLIN | POLLRDNORM;
3001                         break;
3002                 }
3003                 /* Fall through */
3004         default:
3005                 mask = POLLIN | POLLRDNORM | POLLERR;
3006                 break;
3007         }
3008         snd_pcm_stream_unlock_irq(substream);
3009         return mask;
3010 }
3011
3012 /*
3013  * mmap support
3014  */
3015
3016 /*
3017  * Only on coherent architectures, we can mmap the status and the control records
3018  * for effcient data transfer.  On others, we have to use HWSYNC ioctl...
3019  */
3020 #if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_ALPHA)
3021 /*
3022  * mmap status record
3023  */
3024 static int snd_pcm_mmap_status_fault(struct vm_area_struct *area,
3025                                                 struct vm_fault *vmf)
3026 {
3027         struct snd_pcm_substream *substream = area->vm_private_data;
3028         struct snd_pcm_runtime *runtime;
3029
3030         if (substream == NULL)
3031                 return VM_FAULT_SIGBUS;
3032         runtime = substream->runtime;
3033         vmf->page = virt_to_page(runtime->status);
3034         get_page(vmf->page);
3035         return 0;
3036 }
3037
3038 static const struct vm_operations_struct snd_pcm_vm_ops_status =
3039 {
3040         .fault =        snd_pcm_mmap_status_fault,
3041 };
3042
3043 static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
3044                                struct vm_area_struct *area)
3045 {
3046         long size;
3047         if (!(area->vm_flags & VM_READ))
3048                 return -EINVAL;
3049         size = area->vm_end - area->vm_start;
3050         if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_status)))
3051                 return -EINVAL;
3052         area->vm_ops = &snd_pcm_vm_ops_status;
3053         area->vm_private_data = substream;
3054         area->vm_flags |= VM_RESERVED;
3055         return 0;
3056 }
3057
3058 /*
3059  * mmap control record
3060  */
3061 static int snd_pcm_mmap_control_fault(struct vm_area_struct *area,
3062                                                 struct vm_fault *vmf)
3063 {
3064         struct snd_pcm_substream *substream = area->vm_private_data;
3065         struct snd_pcm_runtime *runtime;
3066
3067         if (substream == NULL)
3068                 return VM_FAULT_SIGBUS;
3069         runtime = substream->runtime;
3070         vmf->page = virt_to_page(runtime->control);
3071         get_page(vmf->page);
3072         return 0;
3073 }
3074
3075 static const struct vm_operations_struct snd_pcm_vm_ops_control =
3076 {
3077         .fault =        snd_pcm_mmap_control_fault,
3078 };
3079
3080 static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
3081                                 struct vm_area_struct *area)
3082 {
3083         long size;
3084         if (!(area->vm_flags & VM_READ))
3085                 return -EINVAL;
3086         size = area->vm_end - area->vm_start;
3087         if (size != PAGE_ALIGN(sizeof(struct snd_pcm_mmap_control)))
3088                 return -EINVAL;
3089         area->vm_ops = &snd_pcm_vm_ops_control;
3090         area->vm_private_data = substream;
3091         area->vm_flags |= VM_RESERVED;
3092         return 0;
3093 }
3094 #else /* ! coherent mmap */
3095 /*
3096  * don't support mmap for status and control records.
3097  */
3098 static int snd_pcm_mmap_status(struct snd_pcm_substream *substream, struct file *file,
3099                                struct vm_area_struct *area)
3100 {
3101         return -ENXIO;
3102 }
3103 static int snd_pcm_mmap_control(struct snd_pcm_substream *substream, struct file *file,
3104                                 struct vm_area_struct *area)
3105 {
3106         return -ENXIO;
3107 }
3108 #endif /* coherent mmap */
3109
3110 static inline struct page *
3111 snd_pcm_default_page_ops(struct snd_pcm_substream *substream, unsigned long ofs)
3112 {
3113         void *vaddr = substream->runtime->dma_area + ofs;
3114 #if defined(CONFIG_MIPS) && defined(CONFIG_DMA_NONCOHERENT)
3115         if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV)
3116                 return virt_to_page(CAC_ADDR(vaddr));
3117 #endif
3118 #if defined(CONFIG_PPC32) && defined(CONFIG_NOT_COHERENT_CACHE)
3119         if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV) {
3120                 dma_addr_t addr = substream->runtime->dma_addr + ofs;
3121                 addr -= get_dma_offset(substream->dma_buffer.dev.dev);
3122                 /* assume dma_handle set via pfn_to_phys() in
3123                  * mm/dma-noncoherent.c
3124                  */
3125                 return pfn_to_page(addr >> PAGE_SHIFT);
3126         }
3127 #endif
3128         return virt_to_page(vaddr);
3129 }
3130
3131 /*
3132  * fault callback for mmapping a RAM page
3133  */
3134 static int snd_pcm_mmap_data_fault(struct vm_area_struct *area,
3135                                                 struct vm_fault *vmf)
3136 {
3137         struct snd_pcm_substream *substream = area->vm_private_data;
3138         struct snd_pcm_runtime *runtime;
3139         unsigned long offset;
3140         struct page * page;
3141         size_t dma_bytes;
3142
3143         if (substream == NULL)
3144                 return VM_FAULT_SIGBUS;
3145         runtime = substream->runtime;
3146         offset = vmf->pgoff << PAGE_SHIFT;
3147         dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3148         if (offset > dma_bytes - PAGE_SIZE)
3149                 return VM_FAULT_SIGBUS;
3150         if (substream->ops->page)
3151                 page = substream->ops->page(substream, offset);
3152         else
3153                 page = snd_pcm_default_page_ops(substream, offset);
3154         if (!page)
3155                 return VM_FAULT_SIGBUS;
3156         get_page(page);
3157         vmf->page = page;
3158         return 0;
3159 }
3160
3161 static const struct vm_operations_struct snd_pcm_vm_ops_data = {
3162         .open =         snd_pcm_mmap_data_open,
3163         .close =        snd_pcm_mmap_data_close,
3164 };
3165
3166 static const struct vm_operations_struct snd_pcm_vm_ops_data_fault = {
3167         .open =         snd_pcm_mmap_data_open,
3168         .close =        snd_pcm_mmap_data_close,
3169         .fault =        snd_pcm_mmap_data_fault,
3170 };
3171
3172 #ifndef ARCH_HAS_DMA_MMAP_COHERENT
3173 /* This should be defined / handled globally! */
3174 #ifdef CONFIG_ARM
3175 #define ARCH_HAS_DMA_MMAP_COHERENT
3176 #endif
3177 #endif
3178
3179 /*
3180  * mmap the DMA buffer on RAM
3181  */
3182 static int snd_pcm_default_mmap(struct snd_pcm_substream *substream,
3183                                 struct vm_area_struct *area)
3184 {
3185         area->vm_flags |= VM_RESERVED;
3186 #ifdef ARCH_HAS_DMA_MMAP_COHERENT
3187         if (!substream->ops->page &&
3188             substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV)
3189                 return dma_mmap_coherent(substream->dma_buffer.dev.dev,
3190                                          area,
3191                                          substream->runtime->dma_area,
3192                                          substream->runtime->dma_addr,
3193                                          area->vm_end - area->vm_start);
3194 #elif defined(CONFIG_MIPS) && defined(CONFIG_DMA_NONCOHERENT)
3195         if (substream->dma_buffer.dev.type == SNDRV_DMA_TYPE_DEV &&
3196             !plat_device_is_coherent(substream->dma_buffer.dev.dev))
3197                 area->vm_page_prot = pgprot_noncached(area->vm_page_prot);
3198 #endif /* ARCH_HAS_DMA_MMAP_COHERENT */
3199         /* mmap with fault handler */
3200         area->vm_ops = &snd_pcm_vm_ops_data_fault;
3201         return 0;
3202 }
3203
3204 /*
3205  * mmap the DMA buffer on I/O memory area
3206  */
3207 #if SNDRV_PCM_INFO_MMAP_IOMEM
3208 int snd_pcm_lib_mmap_iomem(struct snd_pcm_substream *substream,
3209                            struct vm_area_struct *area)
3210 {
3211         long size;
3212         unsigned long offset;
3213
3214         area->vm_page_prot = pgprot_noncached(area->vm_page_prot);
3215         area->vm_flags |= VM_IO;
3216         size = area->vm_end - area->vm_start;
3217         offset = area->vm_pgoff << PAGE_SHIFT;
3218         if (io_remap_pfn_range(area, area->vm_start,
3219                                 (substream->runtime->dma_addr + offset) >> PAGE_SHIFT,
3220                                 size, area->vm_page_prot))
3221                 return -EAGAIN;
3222         return 0;
3223 }
3224
3225 EXPORT_SYMBOL(snd_pcm_lib_mmap_iomem);
3226 #endif /* SNDRV_PCM_INFO_MMAP */
3227
3228 /*
3229  * mmap DMA buffer
3230  */
3231 int snd_pcm_mmap_data(struct snd_pcm_substream *substream, struct file *file,
3232                       struct vm_area_struct *area)
3233 {
3234         struct snd_pcm_runtime *runtime;
3235         long size;
3236         unsigned long offset;
3237         size_t dma_bytes;
3238         int err;
3239
3240         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
3241                 if (!(area->vm_flags & (VM_WRITE|VM_READ)))
3242                         return -EINVAL;
3243         } else {
3244                 if (!(area->vm_flags & VM_READ))
3245                         return -EINVAL;
3246         }
3247         runtime = substream->runtime;
3248         if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
3249                 return -EBADFD;
3250         if (!(runtime->info & SNDRV_PCM_INFO_MMAP))
3251                 return -ENXIO;
3252         if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED ||
3253             runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED)
3254                 return -EINVAL;
3255         size = area->vm_end - area->vm_start;
3256         offset = area->vm_pgoff << PAGE_SHIFT;
3257         dma_bytes = PAGE_ALIGN(runtime->dma_bytes);
3258         if ((size_t)size > dma_bytes)
3259                 return -EINVAL;
3260         if (offset > dma_bytes - size)
3261                 return -EINVAL;
3262
3263         area->vm_ops = &snd_pcm_vm_ops_data;
3264         area->vm_private_data = substream;
3265         if (substream->ops->mmap)
3266                 err = substream->ops->mmap(substream, area);
3267         else
3268                 err = snd_pcm_default_mmap(substream, area);
3269         if (!err)
3270                 atomic_inc(&substream->mmap_count);
3271         return err;
3272 }
3273
3274 EXPORT_SYMBOL(snd_pcm_mmap_data);
3275
3276 static int snd_pcm_mmap(struct file *file, struct vm_area_struct *area)
3277 {
3278         struct snd_pcm_file * pcm_file;
3279         struct snd_pcm_substream *substream;
3280         unsigned long offset;
3281
3282         pcm_file = file->private_data;
3283         substream = pcm_file->substream;
3284         if (PCM_RUNTIME_CHECK(substream))
3285                 return -ENXIO;
3286
3287         offset = area->vm_pgoff << PAGE_SHIFT;
3288         switch (offset) {
3289         case SNDRV_PCM_MMAP_OFFSET_STATUS:
3290                 if (pcm_file->no_compat_mmap)
3291                         return -ENXIO;
3292                 return snd_pcm_mmap_status(substream, file, area);
3293         case SNDRV_PCM_MMAP_OFFSET_CONTROL:
3294                 if (pcm_file->no_compat_mmap)
3295                         return -ENXIO;
3296                 return snd_pcm_mmap_control(substream, file, area);
3297         default:
3298                 return snd_pcm_mmap_data(substream, file, area);
3299         }
3300         return 0;
3301 }
3302
3303 static int snd_pcm_fasync(int fd, struct file * file, int on)
3304 {
3305         struct snd_pcm_file * pcm_file;
3306         struct snd_pcm_substream *substream;
3307         struct snd_pcm_runtime *runtime;
3308
3309         pcm_file = file->private_data;
3310         substream = pcm_file->substream;
3311         if (PCM_RUNTIME_CHECK(substream))
3312                 return -ENXIO;
3313         runtime = substream->runtime;
3314         return fasync_helper(fd, file, on, &runtime->fasync);
3315 }
3316
3317 /*
3318  * ioctl32 compat
3319  */
3320 #ifdef CONFIG_COMPAT
3321 #include "pcm_compat.c"
3322 #else
3323 #define snd_pcm_ioctl_compat    NULL
3324 #endif
3325
3326 /*
3327  *  To be removed helpers to keep binary compatibility
3328  */
3329
3330 #ifdef CONFIG_SND_SUPPORT_OLD_API
3331 #define __OLD_TO_NEW_MASK(x) ((x&7)|((x&0x07fffff8)<<5))
3332 #define __NEW_TO_OLD_MASK(x) ((x&7)|((x&0xffffff00)>>5))
3333
3334 static void snd_pcm_hw_convert_from_old_params(struct snd_pcm_hw_params *params,
3335                                                struct snd_pcm_hw_params_old *oparams)
3336 {
3337         unsigned int i;
3338
3339         memset(params, 0, sizeof(*params));
3340         params->flags = oparams->flags;
3341         for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3342                 params->masks[i].bits[0] = oparams->masks[i];
3343         memcpy(params->intervals, oparams->intervals, sizeof(oparams->intervals));
3344         params->rmask = __OLD_TO_NEW_MASK(oparams->rmask);
3345         params->cmask = __OLD_TO_NEW_MASK(oparams->cmask);
3346         params->info = oparams->info;
3347         params->msbits = oparams->msbits;
3348         params->rate_num = oparams->rate_num;
3349         params->rate_den = oparams->rate_den;
3350         params->fifo_size = oparams->fifo_size;
3351 }
3352
3353 static void snd_pcm_hw_convert_to_old_params(struct snd_pcm_hw_params_old *oparams,
3354                                              struct snd_pcm_hw_params *params)
3355 {
3356         unsigned int i;
3357
3358         memset(oparams, 0, sizeof(*oparams));
3359         oparams->flags = params->flags;
3360         for (i = 0; i < ARRAY_SIZE(oparams->masks); i++)
3361                 oparams->masks[i] = params->masks[i].bits[0];
3362         memcpy(oparams->intervals, params->intervals, sizeof(oparams->intervals));
3363         oparams->rmask = __NEW_TO_OLD_MASK(params->rmask);
3364         oparams->cmask = __NEW_TO_OLD_MASK(params->cmask);
3365         oparams->info = params->info;
3366         oparams->msbits = params->msbits;
3367         oparams->rate_num = params->rate_num;
3368         oparams->rate_den = params->rate_den;
3369         oparams->fifo_size = params->fifo_size;
3370 }
3371
3372 static int snd_pcm_hw_refine_old_user(struct snd_pcm_substream *substream,
3373                                       struct snd_pcm_hw_params_old __user * _oparams)
3374 {
3375         struct snd_pcm_hw_params *params;
3376         struct snd_pcm_hw_params_old *oparams = NULL;
3377         int err;
3378
3379         params = kmalloc(sizeof(*params), GFP_KERNEL);
3380         if (!params)
3381                 return -ENOMEM;
3382
3383         oparams = memdup_user(_oparams, sizeof(*oparams));
3384         if (IS_ERR(oparams)) {
3385                 err = PTR_ERR(oparams);
3386                 goto out;
3387         }
3388         snd_pcm_hw_convert_from_old_params(params, oparams);
3389         err = snd_pcm_hw_refine(substream, params);
3390         snd_pcm_hw_convert_to_old_params(oparams, params);
3391         if (copy_to_user(_oparams, oparams, sizeof(*oparams))) {
3392                 if (!err)
3393                         err = -EFAULT;
3394         }
3395
3396         kfree(oparams);
3397 out:
3398         kfree(params);
3399         return err;
3400 }
3401
3402 static int snd_pcm_hw_params_old_user(struct snd_pcm_substream *substream,
3403                                       struct snd_pcm_hw_params_old __user * _oparams)
3404 {
3405         struct snd_pcm_hw_params *params;
3406         struct snd_pcm_hw_params_old *oparams = NULL;
3407         int err;
3408
3409         params = kmalloc(sizeof(*params), GFP_KERNEL);
3410         if (!params)
3411                 return -ENOMEM;
3412
3413         oparams = memdup_user(_oparams, sizeof(*oparams));
3414         if (IS_ERR(oparams)) {
3415                 err = PTR_ERR(oparams);
3416                 goto out;
3417         }
3418         snd_pcm_hw_convert_from_old_params(params, oparams);
3419         err = snd_pcm_hw_params(substream, params);
3420         snd_pcm_hw_convert_to_old_params(oparams, params);
3421         if (copy_to_user(_oparams, oparams, sizeof(*oparams))) {
3422                 if (!err)
3423                         err = -EFAULT;
3424         }
3425
3426         kfree(oparams);
3427 out:
3428         kfree(params);
3429         return err;
3430 }
3431 #endif /* CONFIG_SND_SUPPORT_OLD_API */
3432
3433 #ifndef CONFIG_MMU
3434 static unsigned long snd_pcm_get_unmapped_area(struct file *file,
3435                                                unsigned long addr,
3436                                                unsigned long len,
3437                                                unsigned long pgoff,
3438                                                unsigned long flags)
3439 {
3440         struct snd_pcm_file *pcm_file = file->private_data;
3441         struct snd_pcm_substream *substream = pcm_file->substream;
3442         struct snd_pcm_runtime *runtime = substream->runtime;
3443         unsigned long offset = pgoff << PAGE_SHIFT;
3444
3445         switch (offset) {
3446         case SNDRV_PCM_MMAP_OFFSET_STATUS:
3447                 return (unsigned long)runtime->status;
3448         case SNDRV_PCM_MMAP_OFFSET_CONTROL:
3449                 return (unsigned long)runtime->control;
3450         default:
3451                 return (unsigned long)runtime->dma_area + offset;
3452         }
3453 }
3454 #else
3455 # define snd_pcm_get_unmapped_area NULL
3456 #endif
3457
3458 /*
3459  *  Register section
3460  */
3461
3462 const struct file_operations snd_pcm_f_ops[2] = {
3463         {
3464                 .owner =                THIS_MODULE,
3465                 .write =                snd_pcm_write,
3466                 .aio_write =            snd_pcm_aio_write,
3467                 .open =                 snd_pcm_playback_open,
3468                 .release =              snd_pcm_release,
3469                 .llseek =               no_llseek,
3470                 .poll =                 snd_pcm_playback_poll,
3471                 .unlocked_ioctl =       snd_pcm_playback_ioctl,
3472                 .compat_ioctl =         snd_pcm_ioctl_compat,
3473                 .mmap =                 snd_pcm_mmap,
3474                 .fasync =               snd_pcm_fasync,
3475                 .get_unmapped_area =    snd_pcm_get_unmapped_area,
3476         },
3477         {
3478                 .owner =                THIS_MODULE,
3479                 .read =                 snd_pcm_read,
3480                 .aio_read =             snd_pcm_aio_read,
3481                 .open =                 snd_pcm_capture_open,
3482                 .release =              snd_pcm_release,
3483                 .llseek =               no_llseek,
3484                 .poll =                 snd_pcm_capture_poll,
3485                 .unlocked_ioctl =       snd_pcm_capture_ioctl,
3486                 .compat_ioctl =         snd_pcm_ioctl_compat,
3487                 .mmap =                 snd_pcm_mmap,
3488                 .fasync =               snd_pcm_fasync,
3489                 .get_unmapped_area =    snd_pcm_get_unmapped_area,
3490         }
3491 };