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