sound/soc/intel/atom/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
  37 int sst_register_dsp(struct sst_device *dev)
  38 {
  39         if (WARN_ON(!dev))
  40                 return -EINVAL;
  41         if (!try_module_get(dev->dev->driver->owner))
  42                 return -ENODEV;
  43         mutex_lock(&sst_lock);
  44         if (sst) {
  45                 dev_err(dev->dev, "we already have a device %s\n", sst->name);
  46                 module_put(dev->dev->driver->owner);
  47                 mutex_unlock(&sst_lock);
  48                 return -EEXIST;
  49         }
  50         dev_dbg(dev->dev, "registering device %s\n", dev->name);
  51         sst = dev;
  52         mutex_unlock(&sst_lock);
  53         return 0;
  54 }
  55 EXPORT_SYMBOL_GPL(sst_register_dsp);
  56
  57 int sst_unregister_dsp(struct sst_device *dev)
  58 {
  59         if (WARN_ON(!dev))
  60                 return -EINVAL;
  61         if (dev != sst)
  62                 return -EINVAL;
  63
  64         mutex_lock(&sst_lock);
  65
  66         if (!sst) {
  67                 mutex_unlock(&sst_lock);
  68                 return -EIO;
  69         }
  70
  71         module_put(sst->dev->driver->owner);
  72         dev_dbg(dev->dev, "unreg %s\n", sst->name);
  73         sst = NULL;
  74         mutex_unlock(&sst_lock);
  75         return 0;
  76 }
  77 EXPORT_SYMBOL_GPL(sst_unregister_dsp);
  78
  79 static const struct snd_pcm_hardware sst_platform_pcm_hw = {
  80         .info = (SNDRV_PCM_INFO_INTERLEAVED |
  81                         SNDRV_PCM_INFO_DOUBLE |
  82                         SNDRV_PCM_INFO_PAUSE |
  83                         SNDRV_PCM_INFO_RESUME |
  84                         SNDRV_PCM_INFO_MMAP|
  85                         SNDRV_PCM_INFO_MMAP_VALID |
  86                         SNDRV_PCM_INFO_BLOCK_TRANSFER |
  87                         SNDRV_PCM_INFO_SYNC_START),
  88         .buffer_bytes_max = SST_MAX_BUFFER,
  89         .period_bytes_min = SST_MIN_PERIOD_BYTES,
  90         .period_bytes_max = SST_MAX_PERIOD_BYTES,
  91         .periods_min = SST_MIN_PERIODS,
  92         .periods_max = SST_MAX_PERIODS,
  93         .fifo_size = SST_FIFO_SIZE,
  94 };
  95
  96 static struct sst_dev_stream_map dpcm_strm_map[] = {
  97         {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF}, /* Reserved, not in use */
  98         {MERR_DPCM_AUDIO, 0, SNDRV_PCM_STREAM_PLAYBACK, PIPE_MEDIA1_IN, SST_TASK_ID_MEDIA, 0},
  99         {MERR_DPCM_COMPR, 0, SNDRV_PCM_STREAM_PLAYBACK, PIPE_MEDIA0_IN, SST_TASK_ID_MEDIA, 0},
 100         {MERR_DPCM_AUDIO, 0, SNDRV_PCM_STREAM_CAPTURE, PIPE_PCM1_OUT, SST_TASK_ID_MEDIA, 0},
 101         {MERR_DPCM_DEEP_BUFFER, 0, SNDRV_PCM_STREAM_PLAYBACK, PIPE_MEDIA3_IN, 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)
 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 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                 stream->ops->close(sst->dev, str_id);
 368         module_put(sst->dev->driver->owner);
 369         kfree(stream);
 370 }
 371
 372 static int sst_media_prepare(struct snd_pcm_substream *substream,
 373                 struct snd_soc_dai *dai)
 374 {
 375         struct sst_runtime_stream *stream;
 376         int ret_val = 0, str_id;
 377
 378         stream = substream->runtime->private_data;
 379         str_id = stream->stream_info.str_id;
 380         if (stream->stream_info.str_id) {
 381                 ret_val = stream->ops->stream_drop(sst->dev, str_id);
 382                 return ret_val;
 383         }
 384
 385         ret_val = sst_platform_alloc_stream(substream, dai);
 386         if (ret_val <= 0)
 387                 return ret_val;
 388         snprintf(substream->pcm->id, sizeof(substream->pcm->id),
 389                         "%d", stream->stream_info.str_id);
 390
 391         ret_val = sst_platform_init_stream(substream);
 392         if (ret_val)
 393                 return ret_val;
 394         substream->runtime->hw.info = SNDRV_PCM_INFO_BLOCK_TRANSFER;
 395         return ret_val;
 396 }
 397
 398 static int sst_media_hw_params(struct snd_pcm_substream *substream,
 399                                 struct snd_pcm_hw_params *params,
 400                                 struct snd_soc_dai *dai)
 401 {
 402         int ret;
 403
 404         ret =
 405                 snd_pcm_lib_malloc_pages(substream,
 406                                 params_buffer_bytes(params));
 407         if (ret)
 408                 return ret;
 409         memset(substream->runtime->dma_area, 0, params_buffer_bytes(params));
 410         return 0;
 411 }
 412
 413 static int sst_media_hw_free(struct snd_pcm_substream *substream,
 414                 struct snd_soc_dai *dai)
 415 {
 416         return snd_pcm_lib_free_pages(substream);
 417 }
 418
 419 static int sst_enable_ssp(struct snd_pcm_substream *substream,
 420                         struct snd_soc_dai *dai)
 421 {
 422         int ret = 0;
 423
 424         if (!dai->active) {
 425                 ret = sst_handle_vb_timer(dai, true);
 426                 sst_fill_ssp_defaults(dai);
 427         }
 428         return ret;
 429 }
 430
 431 static int sst_be_hw_params(struct snd_pcm_substream *substream,
 432                                 struct snd_pcm_hw_params *params,
 433                                 struct snd_soc_dai *dai)
 434 {
 435         int ret = 0;
 436
 437         if (dai->active == 1)
 438                 ret = send_ssp_cmd(dai, dai->name, 1);
 439         return ret;
 440 }
 441
 442 static int sst_set_format(struct snd_soc_dai *dai, unsigned int fmt)
 443 {
 444         int ret = 0;
 445
 446         if (!dai->active)
 447                 return 0;
 448
 449         ret = sst_fill_ssp_config(dai, fmt);
 450         if (ret < 0)
 451                 dev_err(dai->dev, "sst_set_format failed..\n");
 452
 453         return ret;
 454 }
 455
 456 static int sst_platform_set_ssp_slot(struct snd_soc_dai *dai,
 457                         unsigned int tx_mask, unsigned int rx_mask,
 458                         int slots, int slot_width) {
 459         int ret = 0;
 460
 461         if (!dai->active)
 462                 return ret;
 463
 464         ret = sst_fill_ssp_slot(dai, tx_mask, rx_mask, slots, slot_width);
 465         if (ret < 0)
 466                 dev_err(dai->dev, "sst_fill_ssp_slot failed..%d\n", ret);
 467
 468         return ret;
 469 }
 470
 471 static void sst_disable_ssp(struct snd_pcm_substream *substream,
 472                         struct snd_soc_dai *dai)
 473 {
 474         if (!dai->active) {
 475                 send_ssp_cmd(dai, dai->name, 0);
 476                 sst_handle_vb_timer(dai, false);
 477         }
 478 }
 479
 480 static const struct snd_soc_dai_ops sst_media_dai_ops = {
 481         .startup = sst_media_open,
 482         .shutdown = sst_media_close,
 483         .prepare = sst_media_prepare,
 484         .hw_params = sst_media_hw_params,
 485         .hw_free = sst_media_hw_free,
 486         .mute_stream = sst_media_digital_mute,
 487 };
 488
 489 static const struct snd_soc_dai_ops sst_compr_dai_ops = {
 490         .mute_stream = sst_media_digital_mute,
 491 };
 492
 493 static const struct snd_soc_dai_ops sst_be_dai_ops = {
 494         .startup = sst_enable_ssp,
 495         .hw_params = sst_be_hw_params,
 496         .set_fmt = sst_set_format,
 497         .set_tdm_slot = sst_platform_set_ssp_slot,
 498         .shutdown = sst_disable_ssp,
 499 };
 500
 501 static struct snd_soc_dai_driver sst_platform_dai[] = {
 502 {
 503         .name = "media-cpu-dai",
 504         .ops = &sst_media_dai_ops,
 505         .playback = {
 506                 .stream_name = "Headset Playback",
 507                 .channels_min = SST_STEREO,
 508                 .channels_max = SST_STEREO,
 509                 .rates = SNDRV_PCM_RATE_44100|SNDRV_PCM_RATE_48000,
 510                 .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE,
 511         },
 512         .capture = {
 513                 .stream_name = "Headset Capture",
 514                 .channels_min = 1,
 515                 .channels_max = 2,
 516                 .rates = SNDRV_PCM_RATE_44100|SNDRV_PCM_RATE_48000,
 517                 .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE,
 518         },
 519 },
 520 {
 521         .name = "deepbuffer-cpu-dai",
 522         .ops = &sst_media_dai_ops,
 523         .playback = {
 524                 .stream_name = "Deepbuffer Playback",
 525                 .channels_min = SST_STEREO,
 526                 .channels_max = SST_STEREO,
 527                 .rates = SNDRV_PCM_RATE_44100|SNDRV_PCM_RATE_48000,
 528                 .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE,
 529         },
 530 },
 531 {
 532         .name = "compress-cpu-dai",
 533         .compress_new = snd_soc_new_compress,
 534         .ops = &sst_compr_dai_ops,
 535         .playback = {
 536                 .stream_name = "Compress Playback",
 537                 .channels_min = 1,
 538         },
 539 },
 540 /* BE CPU  Dais */
 541 {
 542         .name = "ssp0-port",
 543         .ops = &sst_be_dai_ops,
 544         .playback = {
 545                 .stream_name = "ssp0 Tx",
 546                 .channels_min = SST_STEREO,
 547                 .channels_max = SST_STEREO,
 548                 .rates = SNDRV_PCM_RATE_48000,
 549                 .formats = SNDRV_PCM_FMTBIT_S16_LE,
 550         },
 551         .capture = {
 552                 .stream_name = "ssp0 Rx",
 553                 .channels_min = SST_STEREO,
 554                 .channels_max = SST_STEREO,
 555                 .rates = SNDRV_PCM_RATE_48000,
 556                 .formats = SNDRV_PCM_FMTBIT_S16_LE,
 557         },
 558 },
 559 {
 560         .name = "ssp1-port",
 561         .ops = &sst_be_dai_ops,
 562         .playback = {
 563                 .stream_name = "ssp1 Tx",
 564                 .channels_min = SST_STEREO,
 565                 .channels_max = SST_STEREO,
 566                 .rates = SNDRV_PCM_RATE_8000|SNDRV_PCM_RATE_16000|SNDRV_PCM_RATE_48000,
 567                 .formats = SNDRV_PCM_FMTBIT_S16_LE,
 568         },
 569         .capture = {
 570                 .stream_name = "ssp1 Rx",
 571                 .channels_min = SST_STEREO,
 572                 .channels_max = SST_STEREO,
 573                 .rates = SNDRV_PCM_RATE_8000|SNDRV_PCM_RATE_16000|SNDRV_PCM_RATE_48000,
 574                 .formats = SNDRV_PCM_FMTBIT_S16_LE,
 575         },
 576 },
 577 {
 578         .name = "ssp2-port",
 579         .ops = &sst_be_dai_ops,
 580         .playback = {
 581                 .stream_name = "ssp2 Tx",
 582                 .channels_min = SST_STEREO,
 583                 .channels_max = SST_STEREO,
 584                 .rates = SNDRV_PCM_RATE_48000,
 585                 .formats = SNDRV_PCM_FMTBIT_S16_LE,
 586         },
 587         .capture = {
 588                 .stream_name = "ssp2 Rx",
 589                 .channels_min = SST_STEREO,
 590                 .channels_max = SST_STEREO,
 591                 .rates = SNDRV_PCM_RATE_48000,
 592                 .formats = SNDRV_PCM_FMTBIT_S16_LE,
 593         },
 594 },
 595 };
 596
 597 static int sst_platform_open(struct snd_pcm_substream *substream)
 598 {
 599         struct snd_pcm_runtime *runtime;
 600
 601         if (substream->pcm->internal)
 602                 return 0;
 603
 604         runtime = substream->runtime;
 605         runtime->hw = sst_platform_pcm_hw;
 606         return 0;
 607 }
 608
 609 static int sst_platform_pcm_trigger(struct snd_pcm_substream *substream,
 610                                         int cmd)
 611 {
 612         int ret_val = 0, str_id;
 613         struct sst_runtime_stream *stream;
 614         int status;
 615         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 616
 617         dev_dbg(rtd->dev, "sst_platform_pcm_trigger called\n");
 618         if (substream->pcm->internal)
 619                 return 0;
 620         stream = substream->runtime->private_data;
 621         str_id = stream->stream_info.str_id;
 622         switch (cmd) {
 623         case SNDRV_PCM_TRIGGER_START:
 624                 dev_dbg(rtd->dev, "sst: Trigger Start\n");
 625                 status = SST_PLATFORM_RUNNING;
 626                 stream->stream_info.arg = substream;
 627                 ret_val = stream->ops->stream_start(sst->dev, str_id);
 628                 break;
 629         case SNDRV_PCM_TRIGGER_STOP:
 630                 dev_dbg(rtd->dev, "sst: in stop\n");
 631                 status = SST_PLATFORM_DROPPED;
 632                 ret_val = stream->ops->stream_drop(sst->dev, str_id);
 633                 break;
 634         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
 635         case SNDRV_PCM_TRIGGER_SUSPEND:
 636                 dev_dbg(rtd->dev, "sst: in pause\n");
 637                 status = SST_PLATFORM_PAUSED;
 638                 ret_val = stream->ops->stream_pause(sst->dev, str_id);
 639                 break;
 640         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
 641         case SNDRV_PCM_TRIGGER_RESUME:
 642                 dev_dbg(rtd->dev, "sst: in pause release\n");
 643                 status = SST_PLATFORM_RUNNING;
 644                 ret_val = stream->ops->stream_pause_release(sst->dev, str_id);
 645                 break;
 646         default:
 647                 return -EINVAL;
 648         }
 649
 650         if (!ret_val)
 651                 sst_set_stream_status(stream, status);
 652
 653         return ret_val;
 654 }
 655
 656
 657 static snd_pcm_uframes_t sst_platform_pcm_pointer
 658                         (struct snd_pcm_substream *substream)
 659 {
 660         struct sst_runtime_stream *stream;
 661         int ret_val, status;
 662         struct pcm_stream_info *str_info;
 663         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 664
 665         stream = substream->runtime->private_data;
 666         status = sst_get_stream_status(stream);
 667         if (status == SST_PLATFORM_INIT)
 668                 return 0;
 669         str_info = &stream->stream_info;
 670         ret_val = stream->ops->stream_read_tstamp(sst->dev, str_info);
 671         if (ret_val) {
 672                 dev_err(rtd->dev, "sst: error code = %d\n", ret_val);
 673                 return ret_val;
 674         }
 675         substream->runtime->delay = str_info->pcm_delay;
 676         return str_info->buffer_ptr;
 677 }
 678
 679 static const struct snd_pcm_ops sst_platform_ops = {
 680         .open = sst_platform_open,
 681         .ioctl = snd_pcm_lib_ioctl,
 682         .trigger = sst_platform_pcm_trigger,
 683         .pointer = sst_platform_pcm_pointer,
 684 };
 685
 686 static int sst_pcm_new(struct snd_soc_pcm_runtime *rtd)
 687 {
 688         struct snd_soc_dai *dai = rtd->cpu_dai;
 689         struct snd_pcm *pcm = rtd->pcm;
 690         int retval = 0;
 691
 692         if (dai->driver->playback.channels_min ||
 693                         dai->driver->capture.channels_min) {
 694                 retval =  snd_pcm_lib_preallocate_pages_for_all(pcm,
 695                         SNDRV_DMA_TYPE_CONTINUOUS,
 696                         snd_dma_continuous_data(GFP_DMA),
 697                         SST_MIN_BUFFER, SST_MAX_BUFFER);
 698                 if (retval) {
 699                         dev_err(rtd->dev, "dma buffer allocation failure\n");
 700                         return retval;
 701                 }
 702         }
 703         return retval;
 704 }
 705
 706 static int sst_soc_probe(struct snd_soc_component *component)
 707 {
 708         struct sst_data *drv = dev_get_drvdata(component->dev);
 709
 710         drv->soc_card = component->card;
 711         return sst_dsp_init_v2_dpcm(component);
 712 }
 713
 714 static const struct snd_soc_component_driver sst_soc_platform_drv  = {
 715         .name           = DRV_NAME,
 716         .probe          = sst_soc_probe,
 717         .ops            = &sst_platform_ops,
 718         .compr_ops      = &sst_platform_compr_ops,
 719         .pcm_new        = sst_pcm_new,
 720 };
 721
 722 static int sst_platform_probe(struct platform_device *pdev)
 723 {
 724         struct sst_data *drv;
 725         int ret;
 726         struct sst_platform_data *pdata;
 727
 728         drv = devm_kzalloc(&pdev->dev, sizeof(*drv), GFP_KERNEL);
 729         if (drv == NULL) {
 730                 return -ENOMEM;
 731         }
 732
 733         pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
 734         if (pdata == NULL) {
 735                 return -ENOMEM;
 736         }
 737
 738         pdata->pdev_strm_map = dpcm_strm_map;
 739         pdata->strm_map_size = ARRAY_SIZE(dpcm_strm_map);
 740         drv->pdata = pdata;
 741         drv->pdev = pdev;
 742         mutex_init(&drv->lock);
 743         dev_set_drvdata(&pdev->dev, drv);
 744
 745         ret = devm_snd_soc_register_component(&pdev->dev, &sst_soc_platform_drv,
 746                                 sst_platform_dai, ARRAY_SIZE(sst_platform_dai));
 747         if (ret)
 748                 dev_err(&pdev->dev, "registering cpu dais failed\n");
 749
 750         return ret;
 751 }
 752
 753 static int sst_platform_remove(struct platform_device *pdev)
 754 {
 755         dev_dbg(&pdev->dev, "sst_platform_remove success\n");
 756         return 0;
 757 }
 758
 759 #ifdef CONFIG_PM_SLEEP
 760
 761 static int sst_soc_prepare(struct device *dev)
 762 {
 763         struct sst_data *drv = dev_get_drvdata(dev);
 764         struct snd_soc_pcm_runtime *rtd;
 765
 766         if (!drv->soc_card)
 767                 return 0;
 768
 769         /* suspend all pcms first */
 770         snd_soc_suspend(drv->soc_card->dev);
 771         snd_soc_poweroff(drv->soc_card->dev);
 772
 773         /* set the SSPs to idle */
 774         for_each_card_rtds(drv->soc_card, rtd) {
 775                 struct snd_soc_dai *dai = rtd->cpu_dai;
 776
 777                 if (dai->active) {
 778                         send_ssp_cmd(dai, dai->name, 0);
 779                         sst_handle_vb_timer(dai, false);
 780                 }
 781         }
 782
 783         return 0;
 784 }
 785
 786 static void sst_soc_complete(struct device *dev)
 787 {
 788         struct sst_data *drv = dev_get_drvdata(dev);
 789         struct snd_soc_pcm_runtime *rtd;
 790
 791         if (!drv->soc_card)
 792                 return;
 793
 794         /* restart SSPs */
 795         for_each_card_rtds(drv->soc_card, rtd) {
 796                 struct snd_soc_dai *dai = rtd->cpu_dai;
 797
 798                 if (dai->active) {
 799                         sst_handle_vb_timer(dai, true);
 800                         send_ssp_cmd(dai, dai->name, 1);
 801                 }
 802         }
 803         snd_soc_resume(drv->soc_card->dev);
 804 }
 805
 806 #else
 807
 808 #define sst_soc_prepare NULL
 809 #define sst_soc_complete NULL
 810
 811 #endif
 812
 813
 814 static const struct dev_pm_ops sst_platform_pm = {
 815         .prepare        = sst_soc_prepare,
 816         .complete       = sst_soc_complete,
 817 };
 818
 819 static struct platform_driver sst_platform_driver = {
 820         .driver         = {
 821                 .name           = "sst-mfld-platform",
 822                 .pm             = &sst_platform_pm,
 823         },
 824         .probe          = sst_platform_probe,
 825         .remove         = sst_platform_remove,
 826 };
 827
 828 module_platform_driver(sst_platform_driver);
 829
 830 MODULE_DESCRIPTION("ASoC Intel(R) MID Platform driver");
 831 MODULE_AUTHOR("Vinod Koul <vinod.koul@intel.com>");
 832 MODULE_AUTHOR("Harsha Priya <priya.harsha@intel.com>");
 833 MODULE_LICENSE("GPL v2");
 834 MODULE_ALIAS("platform:sst-atom-hifi2-platform");
 835 MODULE_ALIAS("platform:sst-mfld-platform");