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