sound/soc/intel/sst-mfld-platform-pcm.c

   1 /*
   2  *  sst_mfld_platform.c - Intel MID Platform driver
   3  *
   4  *  Copyright (C) 2010-2014 Intel Corp
   5  *  Author: Vinod Koul <vinod.koul@intel.com>
   6  *  Author: Harsha Priya <priya.harsha@intel.com>
   7  *  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   8  *
   9  *  This program is free software; you can redistribute it and/or modify
  10  *  it under the terms of the GNU General Public License as published by
  11  *  the Free Software Foundation; version 2 of the License.
  12  *
  13  *  This program is distributed in the hope that it will be useful, but
  14  *  WITHOUT ANY WARRANTY; without even the implied warranty of
  15  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  *  General Public License for more details.
  17  *
  18  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  19  */
  20 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  21
  22 #include <linux/slab.h>
  23 #include <linux/io.h>
  24 #include <linux/module.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/compress_driver.h>
  30 #include <asm/platform_sst_audio.h>
  31 #include "sst-mfld-platform.h"
  32 #include "sst-atom-controls.h"
  33
  34 struct sst_device *sst;
  35 static DEFINE_MUTEX(sst_lock);
  36 extern struct snd_compr_ops sst_platform_compr_ops;
  37
  38 int sst_register_dsp(struct sst_device *dev)
  39 {
  40         if (WARN_ON(!dev))
  41                 return -EINVAL;
  42         if (!try_module_get(dev->dev->driver->owner))
  43                 return -ENODEV;
  44         mutex_lock(&sst_lock);
  45         if (sst) {
  46                 dev_err(dev->dev, "we already have a device %s\n", sst->name);
  47                 module_put(dev->dev->driver->owner);
  48                 mutex_unlock(&sst_lock);
  49                 return -EEXIST;
  50         }
  51         dev_dbg(dev->dev, "registering device %s\n", dev->name);
  52         sst = dev;
  53         mutex_unlock(&sst_lock);
  54         return 0;
  55 }
  56 EXPORT_SYMBOL_GPL(sst_register_dsp);
  57
  58 int sst_unregister_dsp(struct sst_device *dev)
  59 {
  60         if (WARN_ON(!dev))
  61                 return -EINVAL;
  62         if (dev != sst)
  63                 return -EINVAL;
  64
  65         mutex_lock(&sst_lock);
  66
  67         if (!sst) {
  68                 mutex_unlock(&sst_lock);
  69                 return -EIO;
  70         }
  71
  72         module_put(sst->dev->driver->owner);
  73         dev_dbg(dev->dev, "unreg %s\n", sst->name);
  74         sst = NULL;
  75         mutex_unlock(&sst_lock);
  76         return 0;
  77 }
  78 EXPORT_SYMBOL_GPL(sst_unregister_dsp);
  79
  80 static struct snd_pcm_hardware sst_platform_pcm_hw = {
  81         .info = (SNDRV_PCM_INFO_INTERLEAVED |
  82                         SNDRV_PCM_INFO_DOUBLE |
  83                         SNDRV_PCM_INFO_PAUSE |
  84                         SNDRV_PCM_INFO_RESUME |
  85                         SNDRV_PCM_INFO_MMAP|
  86                         SNDRV_PCM_INFO_MMAP_VALID |
  87                         SNDRV_PCM_INFO_BLOCK_TRANSFER |
  88                         SNDRV_PCM_INFO_SYNC_START),
  89         .buffer_bytes_max = SST_MAX_BUFFER,
  90         .period_bytes_min = SST_MIN_PERIOD_BYTES,
  91         .period_bytes_max = SST_MAX_PERIOD_BYTES,
  92         .periods_min = SST_MIN_PERIODS,
  93         .periods_max = SST_MAX_PERIODS,
  94         .fifo_size = SST_FIFO_SIZE,
  95 };
  96
  97 static struct sst_dev_stream_map dpcm_strm_map[] = {
  98         {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF}, /* Reserved, not in use */
  99         {MERR_DPCM_AUDIO, 0, SNDRV_PCM_STREAM_PLAYBACK, PIPE_MEDIA1_IN, SST_TASK_ID_MEDIA, 0},
 100         {MERR_DPCM_COMPR, 0, SNDRV_PCM_STREAM_PLAYBACK, PIPE_MEDIA0_IN, SST_TASK_ID_MEDIA, 0},
 101         {MERR_DPCM_AUDIO, 0, SNDRV_PCM_STREAM_CAPTURE, PIPE_PCM1_OUT, SST_TASK_ID_MEDIA, 0},
 102 };
 103
 104 static int sst_media_digital_mute(struct snd_soc_dai *dai, int mute, int stream)
 105 {
 106
 107         return sst_send_pipe_gains(dai, stream, mute);
 108 }
 109
 110 /* helper functions */
 111 void sst_set_stream_status(struct sst_runtime_stream *stream,
 112                                         int state)
 113 {
 114         unsigned long flags;
 115         spin_lock_irqsave(&stream->status_lock, flags);
 116         stream->stream_status = state;
 117         spin_unlock_irqrestore(&stream->status_lock, flags);
 118 }
 119
 120 static inline int sst_get_stream_status(struct sst_runtime_stream *stream)
 121 {
 122         int state;
 123         unsigned long flags;
 124
 125         spin_lock_irqsave(&stream->status_lock, flags);
 126         state = stream->stream_status;
 127         spin_unlock_irqrestore(&stream->status_lock, flags);
 128         return state;
 129 }
 130
 131 static void sst_fill_alloc_params(struct snd_pcm_substream *substream,
 132                                 struct snd_sst_alloc_params_ext *alloc_param)
 133 {
 134         unsigned int channels;
 135         snd_pcm_uframes_t period_size;
 136         ssize_t periodbytes;
 137         ssize_t buffer_bytes = snd_pcm_lib_buffer_bytes(substream);
 138         u32 buffer_addr = virt_to_phys(substream->dma_buffer.area);
 139
 140         channels = substream->runtime->channels;
 141         period_size = substream->runtime->period_size;
 142         periodbytes = samples_to_bytes(substream->runtime, period_size);
 143         alloc_param->ring_buf_info[0].addr = buffer_addr;
 144         alloc_param->ring_buf_info[0].size = buffer_bytes;
 145         alloc_param->sg_count = 1;
 146         alloc_param->reserved = 0;
 147         alloc_param->frag_size = periodbytes * channels;
 148
 149 }
 150 static void sst_fill_pcm_params(struct snd_pcm_substream *substream,
 151                                 struct snd_sst_stream_params *param)
 152 {
 153         param->uc.pcm_params.num_chan = (u8) substream->runtime->channels;
 154         param->uc.pcm_params.pcm_wd_sz = substream->runtime->sample_bits;
 155         param->uc.pcm_params.sfreq = substream->runtime->rate;
 156
 157         /* PCM stream via ALSA interface */
 158         param->uc.pcm_params.use_offload_path = 0;
 159         param->uc.pcm_params.reserved2 = 0;
 160         memset(param->uc.pcm_params.channel_map, 0, sizeof(u8));
 161
 162 }
 163
 164 static int sst_get_stream_mapping(int dev, int sdev, int dir,
 165         struct sst_dev_stream_map *map, int size)
 166 {
 167         int i;
 168
 169         if (map == NULL)
 170                 return -EINVAL;
 171
 172
 173         /* index 0 is not used in stream map */
 174         for (i = 1; i < size; i++) {
 175                 if ((map[i].dev_num == dev) && (map[i].direction == dir))
 176                         return i;
 177         }
 178         return 0;
 179 }
 180
 181 int sst_fill_stream_params(void *substream,
 182         const struct sst_data *ctx, struct snd_sst_params *str_params, bool is_compress)
 183 {
 184         int map_size;
 185         int index;
 186         struct sst_dev_stream_map *map;
 187         struct snd_pcm_substream *pstream = NULL;
 188         struct snd_compr_stream *cstream = NULL;
 189
 190         map = ctx->pdata->pdev_strm_map;
 191         map_size = ctx->pdata->strm_map_size;
 192
 193         if (is_compress == true)
 194                 cstream = (struct snd_compr_stream *)substream;
 195         else
 196                 pstream = (struct snd_pcm_substream *)substream;
 197
 198         str_params->stream_type = SST_STREAM_TYPE_MUSIC;
 199
 200         /* For pcm streams */
 201         if (pstream) {
 202                 index = sst_get_stream_mapping(pstream->pcm->device,
 203                                           pstream->number, pstream->stream,
 204                                           map, map_size);
 205                 if (index <= 0)
 206                         return -EINVAL;
 207
 208                 str_params->stream_id = index;
 209                 str_params->device_type = map[index].device_id;
 210                 str_params->task = map[index].task_id;
 211
 212                 str_params->ops = (u8)pstream->stream;
 213         }
 214
 215         if (cstream) {
 216                 index = sst_get_stream_mapping(cstream->device->device,
 217                                                0, cstream->direction,
 218                                                map, map_size);
 219                 if (index <= 0)
 220                         return -EINVAL;
 221                 str_params->stream_id = index;
 222                 str_params->device_type = map[index].device_id;
 223                 str_params->task = map[index].task_id;
 224
 225                 str_params->ops = (u8)cstream->direction;
 226         }
 227         return 0;
 228 }
 229
 230 static int sst_platform_alloc_stream(struct snd_pcm_substream *substream,
 231                 struct snd_soc_dai *dai)
 232 {
 233         struct sst_runtime_stream *stream =
 234                         substream->runtime->private_data;
 235         struct snd_sst_stream_params param = {{{0,},},};
 236         struct snd_sst_params str_params = {0};
 237         struct snd_sst_alloc_params_ext alloc_params = {0};
 238         int ret_val = 0;
 239         struct sst_data *ctx = snd_soc_dai_get_drvdata(dai);
 240
 241         /* set codec params and inform SST driver the same */
 242         sst_fill_pcm_params(substream, &param);
 243         sst_fill_alloc_params(substream, &alloc_params);
 244         substream->runtime->dma_area = substream->dma_buffer.area;
 245         str_params.sparams = param;
 246         str_params.aparams = alloc_params;
 247         str_params.codec = SST_CODEC_TYPE_PCM;
 248
 249         /* fill the device type and stream id to pass to SST driver */
 250         ret_val = sst_fill_stream_params(substream, ctx, &str_params, false);
 251         if (ret_val < 0)
 252                 return ret_val;
 253
 254         stream->stream_info.str_id = str_params.stream_id;
 255
 256         ret_val = stream->ops->open(sst->dev, &str_params);
 257         if (ret_val <= 0)
 258                 return ret_val;
 259
 260
 261         return ret_val;
 262 }
 263
 264 static void sst_period_elapsed(void *arg)
 265 {
 266         struct snd_pcm_substream *substream = arg;
 267         struct sst_runtime_stream *stream;
 268         int status;
 269
 270         if (!substream || !substream->runtime)
 271                 return;
 272         stream = substream->runtime->private_data;
 273         if (!stream)
 274                 return;
 275         status = sst_get_stream_status(stream);
 276         if (status != SST_PLATFORM_RUNNING)
 277                 return;
 278         snd_pcm_period_elapsed(substream);
 279 }
 280
 281 static int sst_platform_init_stream(struct snd_pcm_substream *substream)
 282 {
 283         struct sst_runtime_stream *stream =
 284                         substream->runtime->private_data;
 285         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 286         int ret_val;
 287
 288         dev_dbg(rtd->dev, "setting buffer ptr param\n");
 289         sst_set_stream_status(stream, SST_PLATFORM_INIT);
 290         stream->stream_info.period_elapsed = sst_period_elapsed;
 291         stream->stream_info.arg = substream;
 292         stream->stream_info.buffer_ptr = 0;
 293         stream->stream_info.sfreq = substream->runtime->rate;
 294         ret_val = stream->ops->stream_init(sst->dev, &stream->stream_info);
 295         if (ret_val)
 296                 dev_err(rtd->dev, "control_set ret error %d\n", ret_val);
 297         return ret_val;
 298
 299 }
 300
 301 static int power_up_sst(struct sst_runtime_stream *stream)
 302 {
 303         return stream->ops->power(sst->dev, true);
 304 }
 305
 306 static void power_down_sst(struct sst_runtime_stream *stream)
 307 {
 308         stream->ops->power(sst->dev, false);
 309 }
 310
 311 static int sst_media_open(struct snd_pcm_substream *substream,
 312                 struct snd_soc_dai *dai)
 313 {
 314         int ret_val = 0;
 315         struct snd_pcm_runtime *runtime = substream->runtime;
 316         struct sst_runtime_stream *stream;
 317
 318         stream = kzalloc(sizeof(*stream), GFP_KERNEL);
 319         if (!stream)
 320                 return -ENOMEM;
 321         spin_lock_init(&stream->status_lock);
 322
 323         /* get the sst ops */
 324         mutex_lock(&sst_lock);
 325         if (!sst ||
 326             !try_module_get(sst->dev->driver->owner)) {
 327                 dev_err(dai->dev, "no device available to run\n");
 328                 ret_val = -ENODEV;
 329                 goto out_ops;
 330         }
 331         stream->ops = sst->ops;
 332         mutex_unlock(&sst_lock);
 333
 334         stream->stream_info.str_id = 0;
 335
 336         stream->stream_info.arg = substream;
 337         /* allocate memory for SST API set */
 338         runtime->private_data = stream;
 339
 340         ret_val = power_up_sst(stream);
 341         if (ret_val < 0)
 342                 return ret_val;
 343
 344         /* Make sure, that the period size is always even */
 345         snd_pcm_hw_constraint_step(substream->runtime, 0,
 346                            SNDRV_PCM_HW_PARAM_PERIODS, 2);
 347
 348         return snd_pcm_hw_constraint_integer(runtime,
 349                          SNDRV_PCM_HW_PARAM_PERIODS);
 350 out_ops:
 351         kfree(stream);
 352         mutex_unlock(&sst_lock);
 353         return ret_val;
 354 }
 355
 356 static void sst_media_close(struct snd_pcm_substream *substream,
 357                 struct snd_soc_dai *dai)
 358 {
 359         struct sst_runtime_stream *stream;
 360         int ret_val = 0, str_id;
 361
 362         stream = substream->runtime->private_data;
 363         power_down_sst(stream);
 364
 365         str_id = stream->stream_info.str_id;
 366         if (str_id)
 367                 ret_val = stream->ops->close(sst->dev, str_id);
 368         module_put(sst->dev->driver->owner);
 369         kfree(stream);
 370 }
 371
 372 static inline unsigned int get_current_pipe_id(struct snd_soc_dai *dai,
 373                                                struct snd_pcm_substream *substream)
 374 {
 375         struct sst_data *sst = snd_soc_dai_get_drvdata(dai);
 376         struct sst_dev_stream_map *map = sst->pdata->pdev_strm_map;
 377         struct sst_runtime_stream *stream =
 378                         substream->runtime->private_data;
 379         u32 str_id = stream->stream_info.str_id;
 380         unsigned int pipe_id;
 381
 382         pipe_id = map[str_id].device_id;
 383
 384         dev_dbg(dai->dev, "got pipe_id = %#x for str_id = %d\n",
 385                         pipe_id, str_id);
 386         return pipe_id;
 387 }
 388
 389 static int sst_media_prepare(struct snd_pcm_substream *substream,
 390                 struct snd_soc_dai *dai)
 391 {
 392         struct sst_runtime_stream *stream;
 393         int ret_val = 0, str_id;
 394
 395         stream = substream->runtime->private_data;
 396         str_id = stream->stream_info.str_id;
 397         if (stream->stream_info.str_id) {
 398                 ret_val = stream->ops->stream_drop(sst->dev, str_id);
 399                 return ret_val;
 400         }
 401
 402         ret_val = sst_platform_alloc_stream(substream, dai);
 403         if (ret_val <= 0)
 404                 return ret_val;
 405         snprintf(substream->pcm->id, sizeof(substream->pcm->id),
 406                         "%d", stream->stream_info.str_id);
 407
 408         ret_val = sst_platform_init_stream(substream);
 409         if (ret_val)
 410                 return ret_val;
 411         substream->runtime->hw.info = SNDRV_PCM_INFO_BLOCK_TRANSFER;
 412         return ret_val;
 413 }
 414
 415 static int sst_media_hw_params(struct snd_pcm_substream *substream,
 416                                 struct snd_pcm_hw_params *params,
 417                                 struct snd_soc_dai *dai)
 418 {
 419         snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(params));
 420         memset(substream->runtime->dma_area, 0, params_buffer_bytes(params));
 421         return 0;
 422 }
 423
 424 static int sst_media_hw_free(struct snd_pcm_substream *substream,
 425                 struct snd_soc_dai *dai)
 426 {
 427         return snd_pcm_lib_free_pages(substream);
 428 }
 429
 430 static int sst_enable_ssp(struct snd_pcm_substream *substream,
 431                         struct snd_soc_dai *dai)
 432 {
 433         int ret = 0;
 434
 435         if (!dai->active) {
 436                 ret = sst_handle_vb_timer(dai, true);
 437                 if (ret)
 438                         return ret;
 439                 ret = send_ssp_cmd(dai, dai->name, 1);
 440         }
 441         return ret;
 442 }
 443
 444 static void sst_disable_ssp(struct snd_pcm_substream *substream,
 445                         struct snd_soc_dai *dai)
 446 {
 447         if (!dai->active) {
 448                 send_ssp_cmd(dai, dai->name, 0);
 449                 sst_handle_vb_timer(dai, false);
 450         }
 451 }
 452
 453 static struct snd_soc_dai_ops sst_media_dai_ops = {
 454         .startup = sst_media_open,
 455         .shutdown = sst_media_close,
 456         .prepare = sst_media_prepare,
 457         .hw_params = sst_media_hw_params,
 458         .hw_free = sst_media_hw_free,
 459         .mute_stream = sst_media_digital_mute,
 460 };
 461
 462 static struct snd_soc_dai_ops sst_compr_dai_ops = {
 463         .mute_stream = sst_media_digital_mute,
 464 };
 465
 466 static struct snd_soc_dai_ops sst_be_dai_ops = {
 467         .startup = sst_enable_ssp,
 468         .shutdown = sst_disable_ssp,
 469 };
 470
 471 static struct snd_soc_dai_driver sst_platform_dai[] = {
 472 {
 473         .name = "media-cpu-dai",
 474         .ops = &sst_media_dai_ops,
 475         .playback = {
 476                 .stream_name = "Headset Playback",
 477                 .channels_min = SST_STEREO,
 478                 .channels_max = SST_STEREO,
 479                 .rates = SNDRV_PCM_RATE_44100|SNDRV_PCM_RATE_48000,
 480                 .formats = SNDRV_PCM_FMTBIT_S16_LE,
 481         },
 482         .capture = {
 483                 .stream_name = "Headset Capture",
 484                 .channels_min = 1,
 485                 .channels_max = 2,
 486                 .rates = SNDRV_PCM_RATE_44100|SNDRV_PCM_RATE_48000,
 487                 .formats = SNDRV_PCM_FMTBIT_S16_LE,
 488         },
 489 },
 490 {
 491         .name = "compress-cpu-dai",
 492         .compress_dai = 1,
 493         .ops = &sst_compr_dai_ops,
 494         .playback = {
 495                 .stream_name = "Compress Playback",
 496                 .channels_min = SST_STEREO,
 497                 .channels_max = SST_STEREO,
 498                 .rates = SNDRV_PCM_RATE_48000,
 499                 .formats = SNDRV_PCM_FMTBIT_S16_LE,
 500         },
 501 },
 502 /* BE CPU  Dais */
 503 {
 504         .name = "ssp0-port",
 505         .ops = &sst_be_dai_ops,
 506         .playback = {
 507                 .stream_name = "ssp0 Tx",
 508                 .channels_min = SST_STEREO,
 509                 .channels_max = SST_STEREO,
 510                 .rates = SNDRV_PCM_RATE_48000,
 511                 .formats = SNDRV_PCM_FMTBIT_S16_LE,
 512         },
 513         .capture = {
 514                 .stream_name = "ssp0 Rx",
 515                 .channels_min = SST_STEREO,
 516                 .channels_max = SST_STEREO,
 517                 .rates = SNDRV_PCM_RATE_48000,
 518                 .formats = SNDRV_PCM_FMTBIT_S16_LE,
 519         },
 520 },
 521 {
 522         .name = "ssp1-port",
 523         .ops = &sst_be_dai_ops,
 524         .playback = {
 525                 .stream_name = "ssp1 Tx",
 526                 .channels_min = SST_STEREO,
 527                 .channels_max = SST_STEREO,
 528                 .rates = SNDRV_PCM_RATE_8000|SNDRV_PCM_RATE_16000|SNDRV_PCM_RATE_48000,
 529                 .formats = SNDRV_PCM_FMTBIT_S16_LE,
 530         },
 531         .capture = {
 532                 .stream_name = "ssp1 Rx",
 533                 .channels_min = SST_STEREO,
 534                 .channels_max = SST_STEREO,
 535                 .rates = SNDRV_PCM_RATE_8000|SNDRV_PCM_RATE_16000|SNDRV_PCM_RATE_48000,
 536                 .formats = SNDRV_PCM_FMTBIT_S16_LE,
 537         },
 538 },
 539 {
 540         .name = "ssp2-port",
 541         .ops = &sst_be_dai_ops,
 542         .playback = {
 543                 .stream_name = "ssp2 Tx",
 544                 .channels_min = SST_STEREO,
 545                 .channels_max = SST_STEREO,
 546                 .rates = SNDRV_PCM_RATE_48000,
 547                 .formats = SNDRV_PCM_FMTBIT_S16_LE,
 548         },
 549         .capture = {
 550                 .stream_name = "ssp2 Rx",
 551                 .channels_min = SST_STEREO,
 552                 .channels_max = SST_STEREO,
 553                 .rates = SNDRV_PCM_RATE_48000,
 554                 .formats = SNDRV_PCM_FMTBIT_S16_LE,
 555         },
 556 },
 557 };
 558
 559 static int sst_platform_open(struct snd_pcm_substream *substream)
 560 {
 561         struct snd_pcm_runtime *runtime;
 562
 563         if (substream->pcm->internal)
 564                 return 0;
 565
 566         runtime = substream->runtime;
 567         runtime->hw = sst_platform_pcm_hw;
 568         return 0;
 569 }
 570
 571 static int sst_platform_pcm_trigger(struct snd_pcm_substream *substream,
 572                                         int cmd)
 573 {
 574         int ret_val = 0, str_id;
 575         struct sst_runtime_stream *stream;
 576         int status;
 577         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 578
 579         dev_dbg(rtd->dev, "sst_platform_pcm_trigger called\n");
 580         if (substream->pcm->internal)
 581                 return 0;
 582         stream = substream->runtime->private_data;
 583         str_id = stream->stream_info.str_id;
 584         switch (cmd) {
 585         case SNDRV_PCM_TRIGGER_START:
 586                 dev_dbg(rtd->dev, "sst: Trigger Start\n");
 587                 status = SST_PLATFORM_RUNNING;
 588                 stream->stream_info.arg = substream;
 589                 ret_val = stream->ops->stream_start(sst->dev, str_id);
 590                 break;
 591         case SNDRV_PCM_TRIGGER_STOP:
 592                 dev_dbg(rtd->dev, "sst: in stop\n");
 593                 status = SST_PLATFORM_DROPPED;
 594                 ret_val = stream->ops->stream_drop(sst->dev, str_id);
 595                 break;
 596         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
 597                 dev_dbg(rtd->dev, "sst: in pause\n");
 598                 status = SST_PLATFORM_PAUSED;
 599                 ret_val = stream->ops->stream_pause(sst->dev, str_id);
 600                 break;
 601         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
 602                 dev_dbg(rtd->dev, "sst: in pause release\n");
 603                 status = SST_PLATFORM_RUNNING;
 604                 ret_val = stream->ops->stream_pause_release(sst->dev, str_id);
 605                 break;
 606         default:
 607                 return -EINVAL;
 608         }
 609
 610         if (!ret_val)
 611                 sst_set_stream_status(stream, status);
 612
 613         return ret_val;
 614 }
 615
 616
 617 static snd_pcm_uframes_t sst_platform_pcm_pointer
 618                         (struct snd_pcm_substream *substream)
 619 {
 620         struct sst_runtime_stream *stream;
 621         int ret_val, status;
 622         struct pcm_stream_info *str_info;
 623         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 624
 625         stream = substream->runtime->private_data;
 626         status = sst_get_stream_status(stream);
 627         if (status == SST_PLATFORM_INIT)
 628                 return 0;
 629         str_info = &stream->stream_info;
 630         ret_val = stream->ops->stream_read_tstamp(sst->dev, str_info);
 631         if (ret_val) {
 632                 dev_err(rtd->dev, "sst: error code = %d\n", ret_val);
 633                 return ret_val;
 634         }
 635         substream->runtime->delay = str_info->pcm_delay;
 636         return str_info->buffer_ptr;
 637 }
 638
 639 static struct snd_pcm_ops sst_platform_ops = {
 640         .open = sst_platform_open,
 641         .ioctl = snd_pcm_lib_ioctl,
 642         .trigger = sst_platform_pcm_trigger,
 643         .pointer = sst_platform_pcm_pointer,
 644 };
 645
 646 static void sst_pcm_free(struct snd_pcm *pcm)
 647 {
 648         dev_dbg(pcm->dev, "sst_pcm_free called\n");
 649         snd_pcm_lib_preallocate_free_for_all(pcm);
 650 }
 651
 652 static int sst_pcm_new(struct snd_soc_pcm_runtime *rtd)
 653 {
 654         struct snd_soc_dai *dai = rtd->cpu_dai;
 655         struct snd_pcm *pcm = rtd->pcm;
 656         int retval = 0;
 657
 658         if (dai->driver->playback.channels_min ||
 659                         dai->driver->capture.channels_min) {
 660                 retval =  snd_pcm_lib_preallocate_pages_for_all(pcm,
 661                         SNDRV_DMA_TYPE_CONTINUOUS,
 662                         snd_dma_continuous_data(GFP_DMA),
 663                         SST_MIN_BUFFER, SST_MAX_BUFFER);
 664                 if (retval) {
 665                         dev_err(rtd->dev, "dma buffer allocationf fail\n");
 666                         return retval;
 667                 }
 668         }
 669         return retval;
 670 }
 671
 672 static int sst_soc_probe(struct snd_soc_platform *platform)
 673 {
 674         return sst_dsp_init_v2_dpcm(platform);
 675 }
 676
 677 static struct snd_soc_platform_driver sst_soc_platform_drv  = {
 678         .probe          = sst_soc_probe,
 679         .ops            = &sst_platform_ops,
 680         .compr_ops      = &sst_platform_compr_ops,
 681         .pcm_new        = sst_pcm_new,
 682         .pcm_free       = sst_pcm_free,
 683 };
 684
 685 static const struct snd_soc_component_driver sst_component = {
 686         .name           = "sst",
 687 };
 688
 689
 690 static int sst_platform_probe(struct platform_device *pdev)
 691 {
 692         struct sst_data *drv;
 693         int ret;
 694         struct sst_platform_data *pdata;
 695
 696         drv = devm_kzalloc(&pdev->dev, sizeof(*drv), GFP_KERNEL);
 697         if (drv == NULL) {
 698                 return -ENOMEM;
 699         }
 700
 701         pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
 702         if (pdata == NULL) {
 703                 return -ENOMEM;
 704         }
 705
 706         pdata->pdev_strm_map = dpcm_strm_map;
 707         pdata->strm_map_size = ARRAY_SIZE(dpcm_strm_map);
 708         drv->pdata = pdata;
 709         drv->pdev = pdev;
 710         mutex_init(&drv->lock);
 711         dev_set_drvdata(&pdev->dev, drv);
 712
 713         ret = snd_soc_register_platform(&pdev->dev, &sst_soc_platform_drv);
 714         if (ret) {
 715                 dev_err(&pdev->dev, "registering soc platform failed\n");
 716                 return ret;
 717         }
 718
 719         ret = snd_soc_register_component(&pdev->dev, &sst_component,
 720                                 sst_platform_dai, ARRAY_SIZE(sst_platform_dai));
 721         if (ret) {
 722                 dev_err(&pdev->dev, "registering cpu dais failed\n");
 723                 snd_soc_unregister_platform(&pdev->dev);
 724         }
 725         return ret;
 726 }
 727
 728 static int sst_platform_remove(struct platform_device *pdev)
 729 {
 730
 731         snd_soc_unregister_component(&pdev->dev);
 732         snd_soc_unregister_platform(&pdev->dev);
 733         dev_dbg(&pdev->dev, "sst_platform_remove success\n");
 734         return 0;
 735 }
 736
 737 static struct platform_driver sst_platform_driver = {
 738         .driver         = {
 739                 .name           = "sst-mfld-platform",
 740         },
 741         .probe          = sst_platform_probe,
 742         .remove         = sst_platform_remove,
 743 };
 744
 745 module_platform_driver(sst_platform_driver);
 746
 747 MODULE_DESCRIPTION("ASoC Intel(R) MID Platform driver");
 748 MODULE_AUTHOR("Vinod Koul <vinod.koul@intel.com>");
 749 MODULE_AUTHOR("Harsha Priya <priya.harsha@intel.com>");
 750 MODULE_LICENSE("GPL v2");
 751 MODULE_ALIAS("platform:sst-mfld-platform");