sound/soc/soc-pcm.c

   1 /*
   2  * soc-pcm.c  --  ALSA SoC PCM
   3  *
   4  * Copyright 2005 Wolfson Microelectronics PLC.
   5  * Copyright 2005 Openedhand Ltd.
   6  * Copyright (C) 2010 Slimlogic Ltd.
   7  * Copyright (C) 2010 Texas Instruments Inc.
   8  *
   9  * Authors: Liam Girdwood <lrg@ti.com>
  10  *          Mark Brown <broonie@opensource.wolfsonmicro.com>
  11  *
  12  *  This program is free software; you can redistribute  it and/or modify it
  13  *  under  the terms of  the GNU General  Public License as published by the
  14  *  Free Software Foundation;  either version 2 of the  License, or (at your
  15  *  option) any later version.
  16  *
  17  */
  18
  19 #include <linux/kernel.h>
  20 #include <linux/init.h>
  21 #include <linux/delay.h>
  22 #include <linux/pm_runtime.h>
  23 #include <linux/slab.h>
  24 #include <linux/workqueue.h>
  25 #include <sound/core.h>
  26 #include <sound/pcm.h>
  27 #include <sound/pcm_params.h>
  28 #include <sound/soc.h>
  29 #include <sound/initval.h>
  30
  31 static int soc_pcm_apply_symmetry(struct snd_pcm_substream *substream,
  32                                         struct snd_soc_dai *soc_dai)
  33 {
  34         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  35         int ret;
  36
  37         if (!soc_dai->driver->symmetric_rates &&
  38             !rtd->dai_link->symmetric_rates)
  39                 return 0;
  40
  41         /* This can happen if multiple streams are starting simultaneously -
  42          * the second can need to get its constraints before the first has
  43          * picked a rate.  Complain and allow the application to carry on.
  44          */
  45         if (!soc_dai->rate) {
  46                 dev_warn(soc_dai->dev,
  47                          "Not enforcing symmetric_rates due to race\n");
  48                 return 0;
  49         }
  50
  51         dev_dbg(soc_dai->dev, "Symmetry forces %dHz rate\n", soc_dai->rate);
  52
  53         ret = snd_pcm_hw_constraint_minmax(substream->runtime,
  54                                            SNDRV_PCM_HW_PARAM_RATE,
  55                                            soc_dai->rate, soc_dai->rate);
  56         if (ret < 0) {
  57                 dev_err(soc_dai->dev,
  58                         "Unable to apply rate symmetry constraint: %d\n", ret);
  59                 return ret;
  60         }
  61
  62         return 0;
  63 }
  64
  65 /*
  66  * List of sample sizes that might go over the bus for parameter
  67  * application.  There ought to be a wildcard sample size for things
  68  * like the DAC/ADC resolution to use but there isn't right now.
  69  */
  70 static int sample_sizes[] = {
  71         24, 32,
  72 };
  73
  74 static void soc_pcm_apply_msb(struct snd_pcm_substream *substream,
  75                               struct snd_soc_dai *dai)
  76 {
  77         int ret, i, bits;
  78
  79         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
  80                 bits = dai->driver->playback.sig_bits;
  81         else
  82                 bits = dai->driver->capture.sig_bits;
  83
  84         if (!bits)
  85                 return;
  86
  87         for (i = 0; i < ARRAY_SIZE(sample_sizes); i++) {
  88                 if (bits >= sample_sizes[i])
  89                         continue;
  90
  91                 ret = snd_pcm_hw_constraint_msbits(substream->runtime, 0,
  92                                                    sample_sizes[i], bits);
  93                 if (ret != 0)
  94                         dev_warn(dai->dev,
  95                                  "Failed to set MSB %d/%d: %d\n",
  96                                  bits, sample_sizes[i], ret);
  97         }
  98 }
  99
 100 /*
 101  * Called by ALSA when a PCM substream is opened, the runtime->hw record is
 102  * then initialized and any private data can be allocated. This also calls
 103  * startup for the cpu DAI, platform, machine and codec DAI.
 104  */
 105 static int soc_pcm_open(struct snd_pcm_substream *substream)
 106 {
 107         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 108         struct snd_pcm_runtime *runtime = substream->runtime;
 109         struct snd_soc_platform *platform = rtd->platform;
 110         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 111         struct snd_soc_dai *codec_dai = rtd->codec_dai;
 112         struct snd_soc_dai_driver *cpu_dai_drv = cpu_dai->driver;
 113         struct snd_soc_dai_driver *codec_dai_drv = codec_dai->driver;
 114         int ret = 0;
 115
 116         pm_runtime_get_sync(cpu_dai->dev);
 117         pm_runtime_get_sync(codec_dai->dev);
 118         pm_runtime_get_sync(platform->dev);
 119
 120         mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
 121
 122         /* startup the audio subsystem */
 123         if (cpu_dai->driver->ops->startup) {
 124                 ret = cpu_dai->driver->ops->startup(substream, cpu_dai);
 125                 if (ret < 0) {
 126                         dev_err(cpu_dai->dev, "can't open interface %s: %d\n",
 127                                 cpu_dai->name, ret);
 128                         goto out;
 129                 }
 130         }
 131
 132         if (platform->driver->ops && platform->driver->ops->open) {
 133                 ret = platform->driver->ops->open(substream);
 134                 if (ret < 0) {
 135                         dev_err(platform->dev, "can't open platform %s: %d\n",
 136                                 platform->name, ret);
 137                         goto platform_err;
 138                 }
 139         }
 140
 141         if (codec_dai->driver->ops->startup) {
 142                 ret = codec_dai->driver->ops->startup(substream, codec_dai);
 143                 if (ret < 0) {
 144                         dev_err(codec_dai->dev, "can't open codec %s: %d\n",
 145                                 codec_dai->name, ret);
 146                         goto codec_dai_err;
 147                 }
 148         }
 149
 150         if (rtd->dai_link->ops && rtd->dai_link->ops->startup) {
 151                 ret = rtd->dai_link->ops->startup(substream);
 152                 if (ret < 0) {
 153                         pr_err("asoc: %s startup failed: %d\n",
 154                                rtd->dai_link->name, ret);
 155                         goto machine_err;
 156                 }
 157         }
 158
 159         /* Check that the codec and cpu DAIs are compatible */
 160         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 161                 runtime->hw.rate_min =
 162                         max(codec_dai_drv->playback.rate_min,
 163                             cpu_dai_drv->playback.rate_min);
 164                 runtime->hw.rate_max =
 165                         min(codec_dai_drv->playback.rate_max,
 166                             cpu_dai_drv->playback.rate_max);
 167                 runtime->hw.channels_min =
 168                         max(codec_dai_drv->playback.channels_min,
 169                                 cpu_dai_drv->playback.channels_min);
 170                 runtime->hw.channels_max =
 171                         min(codec_dai_drv->playback.channels_max,
 172                                 cpu_dai_drv->playback.channels_max);
 173                 runtime->hw.formats =
 174                         codec_dai_drv->playback.formats & cpu_dai_drv->playback.formats;
 175                 runtime->hw.rates =
 176                         codec_dai_drv->playback.rates & cpu_dai_drv->playback.rates;
 177                 if (codec_dai_drv->playback.rates
 178                            & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
 179                         runtime->hw.rates |= cpu_dai_drv->playback.rates;
 180                 if (cpu_dai_drv->playback.rates
 181                            & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
 182                         runtime->hw.rates |= codec_dai_drv->playback.rates;
 183         } else {
 184                 runtime->hw.rate_min =
 185                         max(codec_dai_drv->capture.rate_min,
 186                             cpu_dai_drv->capture.rate_min);
 187                 runtime->hw.rate_max =
 188                         min(codec_dai_drv->capture.rate_max,
 189                             cpu_dai_drv->capture.rate_max);
 190                 runtime->hw.channels_min =
 191                         max(codec_dai_drv->capture.channels_min,
 192                                 cpu_dai_drv->capture.channels_min);
 193                 runtime->hw.channels_max =
 194                         min(codec_dai_drv->capture.channels_max,
 195                                 cpu_dai_drv->capture.channels_max);
 196                 runtime->hw.formats =
 197                         codec_dai_drv->capture.formats & cpu_dai_drv->capture.formats;
 198                 runtime->hw.rates =
 199                         codec_dai_drv->capture.rates & cpu_dai_drv->capture.rates;
 200                 if (codec_dai_drv->capture.rates
 201                            & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
 202                         runtime->hw.rates |= cpu_dai_drv->capture.rates;
 203                 if (cpu_dai_drv->capture.rates
 204                            & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
 205                         runtime->hw.rates |= codec_dai_drv->capture.rates;
 206         }
 207
 208         ret = -EINVAL;
 209         snd_pcm_limit_hw_rates(runtime);
 210         if (!runtime->hw.rates) {
 211                 printk(KERN_ERR "asoc: %s <-> %s No matching rates\n",
 212                         codec_dai->name, cpu_dai->name);
 213                 goto config_err;
 214         }
 215         if (!runtime->hw.formats) {
 216                 printk(KERN_ERR "asoc: %s <-> %s No matching formats\n",
 217                         codec_dai->name, cpu_dai->name);
 218                 goto config_err;
 219         }
 220         if (!runtime->hw.channels_min || !runtime->hw.channels_max ||
 221             runtime->hw.channels_min > runtime->hw.channels_max) {
 222                 printk(KERN_ERR "asoc: %s <-> %s No matching channels\n",
 223                                 codec_dai->name, cpu_dai->name);
 224                 goto config_err;
 225         }
 226
 227         soc_pcm_apply_msb(substream, codec_dai);
 228         soc_pcm_apply_msb(substream, cpu_dai);
 229
 230         /* Symmetry only applies if we've already got an active stream. */
 231         if (cpu_dai->active) {
 232                 ret = soc_pcm_apply_symmetry(substream, cpu_dai);
 233                 if (ret != 0)
 234                         goto config_err;
 235         }
 236
 237         if (codec_dai->active) {
 238                 ret = soc_pcm_apply_symmetry(substream, codec_dai);
 239                 if (ret != 0)
 240                         goto config_err;
 241         }
 242
 243         pr_debug("asoc: %s <-> %s info:\n",
 244                         codec_dai->name, cpu_dai->name);
 245         pr_debug("asoc: rate mask 0x%x\n", runtime->hw.rates);
 246         pr_debug("asoc: min ch %d max ch %d\n", runtime->hw.channels_min,
 247                  runtime->hw.channels_max);
 248         pr_debug("asoc: min rate %d max rate %d\n", runtime->hw.rate_min,
 249                  runtime->hw.rate_max);
 250
 251         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 252                 cpu_dai->playback_active++;
 253                 codec_dai->playback_active++;
 254         } else {
 255                 cpu_dai->capture_active++;
 256                 codec_dai->capture_active++;
 257         }
 258         cpu_dai->active++;
 259         codec_dai->active++;
 260         rtd->codec->active++;
 261         mutex_unlock(&rtd->pcm_mutex);
 262         return 0;
 263
 264 config_err:
 265         if (rtd->dai_link->ops && rtd->dai_link->ops->shutdown)
 266                 rtd->dai_link->ops->shutdown(substream);
 267
 268 machine_err:
 269         if (codec_dai->driver->ops->shutdown)
 270                 codec_dai->driver->ops->shutdown(substream, codec_dai);
 271
 272 codec_dai_err:
 273         if (platform->driver->ops && platform->driver->ops->close)
 274                 platform->driver->ops->close(substream);
 275
 276 platform_err:
 277         if (cpu_dai->driver->ops->shutdown)
 278                 cpu_dai->driver->ops->shutdown(substream, cpu_dai);
 279 out:
 280         mutex_unlock(&rtd->pcm_mutex);
 281
 282         pm_runtime_put(platform->dev);
 283         pm_runtime_put(codec_dai->dev);
 284         pm_runtime_put(cpu_dai->dev);
 285
 286         return ret;
 287 }
 288
 289 /*
 290  * Power down the audio subsystem pmdown_time msecs after close is called.
 291  * This is to ensure there are no pops or clicks in between any music tracks
 292  * due to DAPM power cycling.
 293  */
 294 static void close_delayed_work(struct work_struct *work)
 295 {
 296         struct snd_soc_pcm_runtime *rtd =
 297                         container_of(work, struct snd_soc_pcm_runtime, delayed_work.work);
 298         struct snd_soc_dai *codec_dai = rtd->codec_dai;
 299
 300         mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
 301
 302         pr_debug("pop wq checking: %s status: %s waiting: %s\n",
 303                  codec_dai->driver->playback.stream_name,
 304                  codec_dai->playback_active ? "active" : "inactive",
 305                  codec_dai->pop_wait ? "yes" : "no");
 306
 307         /* are we waiting on this codec DAI stream */
 308         if (codec_dai->pop_wait == 1) {
 309                 codec_dai->pop_wait = 0;
 310                 snd_soc_dapm_stream_event(rtd,
 311                         codec_dai->driver->playback.stream_name,
 312                         SND_SOC_DAPM_STREAM_STOP);
 313         }
 314
 315         mutex_unlock(&rtd->pcm_mutex);
 316 }
 317
 318 /*
 319  * Called by ALSA when a PCM substream is closed. Private data can be
 320  * freed here. The cpu DAI, codec DAI, machine and platform are also
 321  * shutdown.
 322  */
 323 static int soc_pcm_close(struct snd_pcm_substream *substream)
 324 {
 325         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 326         struct snd_soc_platform *platform = rtd->platform;
 327         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 328         struct snd_soc_dai *codec_dai = rtd->codec_dai;
 329         struct snd_soc_codec *codec = rtd->codec;
 330
 331         mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
 332
 333         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 334                 cpu_dai->playback_active--;
 335                 codec_dai->playback_active--;
 336         } else {
 337                 cpu_dai->capture_active--;
 338                 codec_dai->capture_active--;
 339         }
 340
 341         cpu_dai->active--;
 342         codec_dai->active--;
 343         codec->active--;
 344
 345         /* clear the corresponding DAIs rate when inactive */
 346         if (!cpu_dai->active)
 347                 cpu_dai->rate = 0;
 348
 349         if (!codec_dai->active)
 350                 codec_dai->rate = 0;
 351
 352         /* Muting the DAC suppresses artifacts caused during digital
 353          * shutdown, for example from stopping clocks.
 354          */
 355         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 356                 snd_soc_dai_digital_mute(codec_dai, 1);
 357
 358         if (cpu_dai->driver->ops->shutdown)
 359                 cpu_dai->driver->ops->shutdown(substream, cpu_dai);
 360
 361         if (codec_dai->driver->ops->shutdown)
 362                 codec_dai->driver->ops->shutdown(substream, codec_dai);
 363
 364         if (rtd->dai_link->ops && rtd->dai_link->ops->shutdown)
 365                 rtd->dai_link->ops->shutdown(substream);
 366
 367         if (platform->driver->ops && platform->driver->ops->close)
 368                 platform->driver->ops->close(substream);
 369         cpu_dai->runtime = NULL;
 370
 371         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 372                 if (!rtd->pmdown_time || codec->ignore_pmdown_time ||
 373                     rtd->dai_link->ignore_pmdown_time) {
 374                         /* powered down playback stream now */
 375                         snd_soc_dapm_stream_event(rtd,
 376                                 codec_dai->driver->playback.stream_name,
 377                                 SND_SOC_DAPM_STREAM_STOP);
 378                 } else {
 379                         /* start delayed pop wq here for playback streams */
 380                         codec_dai->pop_wait = 1;
 381                         schedule_delayed_work(&rtd->delayed_work,
 382                                 msecs_to_jiffies(rtd->pmdown_time));
 383                 }
 384         } else {
 385                 /* capture streams can be powered down now */
 386                 snd_soc_dapm_stream_event(rtd,
 387                         codec_dai->driver->capture.stream_name,
 388                         SND_SOC_DAPM_STREAM_STOP);
 389         }
 390
 391         mutex_unlock(&rtd->pcm_mutex);
 392
 393         pm_runtime_put(platform->dev);
 394         pm_runtime_put(codec_dai->dev);
 395         pm_runtime_put(cpu_dai->dev);
 396
 397         return 0;
 398 }
 399
 400 /*
 401  * Called by ALSA when the PCM substream is prepared, can set format, sample
 402  * rate, etc.  This function is non atomic and can be called multiple times,
 403  * it can refer to the runtime info.
 404  */
 405 static int soc_pcm_prepare(struct snd_pcm_substream *substream)
 406 {
 407         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 408         struct snd_soc_platform *platform = rtd->platform;
 409         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 410         struct snd_soc_dai *codec_dai = rtd->codec_dai;
 411         int ret = 0;
 412
 413         mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
 414
 415         if (rtd->dai_link->ops && rtd->dai_link->ops->prepare) {
 416                 ret = rtd->dai_link->ops->prepare(substream);
 417                 if (ret < 0) {
 418                         pr_err("asoc: machine prepare error: %d\n", ret);
 419                         goto out;
 420                 }
 421         }
 422
 423         if (platform->driver->ops && platform->driver->ops->prepare) {
 424                 ret = platform->driver->ops->prepare(substream);
 425                 if (ret < 0) {
 426                         dev_err(platform->dev, "platform prepare error: %d\n",
 427                                 ret);
 428                         goto out;
 429                 }
 430         }
 431
 432         if (codec_dai->driver->ops->prepare) {
 433                 ret = codec_dai->driver->ops->prepare(substream, codec_dai);
 434                 if (ret < 0) {
 435                         dev_err(codec_dai->dev, "DAI prepare error: %d\n",
 436                                 ret);
 437                         goto out;
 438                 }
 439         }
 440
 441         if (cpu_dai->driver->ops->prepare) {
 442                 ret = cpu_dai->driver->ops->prepare(substream, cpu_dai);
 443                 if (ret < 0) {
 444                         dev_err(cpu_dai->dev, "DAI prepare error: %d\n",
 445                                 ret);
 446                         goto out;
 447                 }
 448         }
 449
 450         /* cancel any delayed stream shutdown that is pending */
 451         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
 452             codec_dai->pop_wait) {
 453                 codec_dai->pop_wait = 0;
 454                 cancel_delayed_work(&rtd->delayed_work);
 455         }
 456
 457         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 458                 snd_soc_dapm_stream_event(rtd,
 459                                           codec_dai->driver->playback.stream_name,
 460                                           SND_SOC_DAPM_STREAM_START);
 461         else
 462                 snd_soc_dapm_stream_event(rtd,
 463                                           codec_dai->driver->capture.stream_name,
 464                                           SND_SOC_DAPM_STREAM_START);
 465
 466         snd_soc_dai_digital_mute(codec_dai, 0);
 467
 468 out:
 469         mutex_unlock(&rtd->pcm_mutex);
 470         return ret;
 471 }
 472
 473 /*
 474  * Called by ALSA when the hardware params are set by application. This
 475  * function can also be called multiple times and can allocate buffers
 476  * (using snd_pcm_lib_* ). It's non-atomic.
 477  */
 478 static int soc_pcm_hw_params(struct snd_pcm_substream *substream,
 479                                 struct snd_pcm_hw_params *params)
 480 {
 481         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 482         struct snd_soc_platform *platform = rtd->platform;
 483         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 484         struct snd_soc_dai *codec_dai = rtd->codec_dai;
 485         int ret = 0;
 486
 487         mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
 488
 489         if (rtd->dai_link->ops && rtd->dai_link->ops->hw_params) {
 490                 ret = rtd->dai_link->ops->hw_params(substream, params);
 491                 if (ret < 0) {
 492                         pr_err("asoc: machine hw_params failed: %d\n", ret);
 493                         goto out;
 494                 }
 495         }
 496
 497         if (codec_dai->driver->ops->hw_params) {
 498                 ret = codec_dai->driver->ops->hw_params(substream, params, codec_dai);
 499                 if (ret < 0) {
 500                         dev_err(codec_dai->dev, "can't set %s hw params: %d\n",
 501                                 codec_dai->name, ret);
 502                         goto codec_err;
 503                 }
 504         }
 505
 506         if (cpu_dai->driver->ops->hw_params) {
 507                 ret = cpu_dai->driver->ops->hw_params(substream, params, cpu_dai);
 508                 if (ret < 0) {
 509                         dev_err(cpu_dai->dev, "%s hw params failed: %d\n",
 510                                 cpu_dai->name, ret);
 511                         goto interface_err;
 512                 }
 513         }
 514
 515         if (platform->driver->ops && platform->driver->ops->hw_params) {
 516                 ret = platform->driver->ops->hw_params(substream, params);
 517                 if (ret < 0) {
 518                         dev_err(platform->dev, "%s hw params failed: %d\n",
 519                                platform->name, ret);
 520                         goto platform_err;
 521                 }
 522         }
 523
 524         /* store the rate for each DAIs */
 525         cpu_dai->rate = params_rate(params);
 526         codec_dai->rate = params_rate(params);
 527
 528 out:
 529         mutex_unlock(&rtd->pcm_mutex);
 530         return ret;
 531
 532 platform_err:
 533         if (cpu_dai->driver->ops->hw_free)
 534                 cpu_dai->driver->ops->hw_free(substream, cpu_dai);
 535
 536 interface_err:
 537         if (codec_dai->driver->ops->hw_free)
 538                 codec_dai->driver->ops->hw_free(substream, codec_dai);
 539
 540 codec_err:
 541         if (rtd->dai_link->ops && rtd->dai_link->ops->hw_free)
 542                 rtd->dai_link->ops->hw_free(substream);
 543
 544         mutex_unlock(&rtd->pcm_mutex);
 545         return ret;
 546 }
 547
 548 /*
 549  * Frees resources allocated by hw_params, can be called multiple times
 550  */
 551 static int soc_pcm_hw_free(struct snd_pcm_substream *substream)
 552 {
 553         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 554         struct snd_soc_platform *platform = rtd->platform;
 555         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 556         struct snd_soc_dai *codec_dai = rtd->codec_dai;
 557         struct snd_soc_codec *codec = rtd->codec;
 558
 559         mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
 560
 561         /* apply codec digital mute */
 562         if (!codec->active)
 563                 snd_soc_dai_digital_mute(codec_dai, 1);
 564
 565         /* free any machine hw params */
 566         if (rtd->dai_link->ops && rtd->dai_link->ops->hw_free)
 567                 rtd->dai_link->ops->hw_free(substream);
 568
 569         /* free any DMA resources */
 570         if (platform->driver->ops && platform->driver->ops->hw_free)
 571                 platform->driver->ops->hw_free(substream);
 572
 573         /* now free hw params for the DAIs  */
 574         if (codec_dai->driver->ops->hw_free)
 575                 codec_dai->driver->ops->hw_free(substream, codec_dai);
 576
 577         if (cpu_dai->driver->ops->hw_free)
 578                 cpu_dai->driver->ops->hw_free(substream, cpu_dai);
 579
 580         mutex_unlock(&rtd->pcm_mutex);
 581         return 0;
 582 }
 583
 584 static int soc_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
 585 {
 586         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 587         struct snd_soc_platform *platform = rtd->platform;
 588         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 589         struct snd_soc_dai *codec_dai = rtd->codec_dai;
 590         int ret;
 591
 592         if (codec_dai->driver->ops->trigger) {
 593                 ret = codec_dai->driver->ops->trigger(substream, cmd, codec_dai);
 594                 if (ret < 0)
 595                         return ret;
 596         }
 597
 598         if (platform->driver->ops && platform->driver->ops->trigger) {
 599                 ret = platform->driver->ops->trigger(substream, cmd);
 600                 if (ret < 0)
 601                         return ret;
 602         }
 603
 604         if (cpu_dai->driver->ops->trigger) {
 605                 ret = cpu_dai->driver->ops->trigger(substream, cmd, cpu_dai);
 606                 if (ret < 0)
 607                         return ret;
 608         }
 609         return 0;
 610 }
 611
 612 /*
 613  * soc level wrapper for pointer callback
 614  * If cpu_dai, codec_dai, platform driver has the delay callback, than
 615  * the runtime->delay will be updated accordingly.
 616  */
 617 static snd_pcm_uframes_t soc_pcm_pointer(struct snd_pcm_substream *substream)
 618 {
 619         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 620         struct snd_soc_platform *platform = rtd->platform;
 621         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 622         struct snd_soc_dai *codec_dai = rtd->codec_dai;
 623         struct snd_pcm_runtime *runtime = substream->runtime;
 624         snd_pcm_uframes_t offset = 0;
 625         snd_pcm_sframes_t delay = 0;
 626
 627         if (platform->driver->ops && platform->driver->ops->pointer)
 628                 offset = platform->driver->ops->pointer(substream);
 629
 630         if (cpu_dai->driver->ops->delay)
 631                 delay += cpu_dai->driver->ops->delay(substream, cpu_dai);
 632
 633         if (codec_dai->driver->ops->delay)
 634                 delay += codec_dai->driver->ops->delay(substream, codec_dai);
 635
 636         if (platform->driver->delay)
 637                 delay += platform->driver->delay(substream, codec_dai);
 638
 639         runtime->delay = delay;
 640
 641         return offset;
 642 }
 643
 644 /* create a new pcm */
 645 int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num)
 646 {
 647         struct snd_soc_codec *codec = rtd->codec;
 648         struct snd_soc_platform *platform = rtd->platform;
 649         struct snd_soc_dai *codec_dai = rtd->codec_dai;
 650         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 651         struct snd_pcm_ops *soc_pcm_ops = &rtd->ops;
 652         struct snd_pcm *pcm;
 653         char new_name[64];
 654         int ret = 0, playback = 0, capture = 0;
 655
 656         soc_pcm_ops->open       = soc_pcm_open;
 657         soc_pcm_ops->close      = soc_pcm_close;
 658         soc_pcm_ops->hw_params  = soc_pcm_hw_params;
 659         soc_pcm_ops->hw_free    = soc_pcm_hw_free;
 660         soc_pcm_ops->prepare    = soc_pcm_prepare;
 661         soc_pcm_ops->trigger    = soc_pcm_trigger;
 662         soc_pcm_ops->pointer    = soc_pcm_pointer;
 663
 664         /* check client and interface hw capabilities */
 665         snprintf(new_name, sizeof(new_name), "%s %s-%d",
 666                         rtd->dai_link->stream_name, codec_dai->name, num);
 667
 668         if (codec_dai->driver->playback.channels_min)
 669                 playback = 1;
 670         if (codec_dai->driver->capture.channels_min)
 671                 capture = 1;
 672
 673         dev_dbg(rtd->card->dev, "registered pcm #%d %s\n",num,new_name);
 674         ret = snd_pcm_new(rtd->card->snd_card, new_name,
 675                         num, playback, capture, &pcm);
 676         if (ret < 0) {
 677                 printk(KERN_ERR "asoc: can't create pcm for codec %s\n", codec->name);
 678                 return ret;
 679         }
 680
 681         /* DAPM dai link stream work */
 682         INIT_DELAYED_WORK(&rtd->delayed_work, close_delayed_work);
 683
 684         rtd->pcm = pcm;
 685         pcm->private_data = rtd;
 686         if (platform->driver->ops) {
 687                 soc_pcm_ops->mmap = platform->driver->ops->mmap;
 688                 soc_pcm_ops->pointer = platform->driver->ops->pointer;
 689                 soc_pcm_ops->ioctl = platform->driver->ops->ioctl;
 690                 soc_pcm_ops->copy = platform->driver->ops->copy;
 691                 soc_pcm_ops->silence = platform->driver->ops->silence;
 692                 soc_pcm_ops->ack = platform->driver->ops->ack;
 693                 soc_pcm_ops->page = platform->driver->ops->page;
 694         }
 695
 696         if (playback)
 697                 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, soc_pcm_ops);
 698
 699         if (capture)
 700                 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, soc_pcm_ops);
 701
 702         if (platform->driver->pcm_new) {
 703                 ret = platform->driver->pcm_new(rtd);
 704                 if (ret < 0) {
 705                         pr_err("asoc: platform pcm constructor failed\n");
 706                         return ret;
 707                 }
 708         }
 709
 710         pcm->private_free = platform->driver->pcm_free;
 711         printk(KERN_INFO "asoc: %s <-> %s mapping ok\n", codec_dai->name,
 712                 cpu_dai->name);
 713         return ret;
 714 }