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

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  *  sst_mfld_platform.c - Intel MID Platform driver
   4  *
   5  *  Copyright (C) 2010-2014 Intel Corp
   6  *  Author: Vinod Koul <vinod.koul@intel.com>
   7  *  Author: Harsha Priya <priya.harsha@intel.com>
   8  *  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   9  *
  10  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  11  */
  12 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  13
  14 #include <linux/slab.h>
  15 #include <linux/io.h>
  16 #include <linux/module.h>
  17 #include <sound/core.h>
  18 #include <sound/pcm.h>
  19 #include <sound/pcm_params.h>
  20 #include <sound/soc.h>
  21 #include <sound/compress_driver.h>
  22 #include <asm/platform_sst_audio.h>
  23 #include "sst-mfld-platform.h"
  24 #include "sst-atom-controls.h"
  25
  26 struct sst_device *sst;
  27 static DEFINE_MUTEX(sst_lock);
  28
  29 int sst_register_dsp(struct sst_device *dev)
  30 {
  31         if (WARN_ON(!dev))
  32                 return -EINVAL;
  33         if (!try_module_get(dev->dev->driver->owner))
  34                 return -ENODEV;
  35         mutex_lock(&sst_lock);
  36         if (sst) {
  37                 dev_err(dev->dev, "we already have a device %s\n", sst->name);
  38                 module_put(dev->dev->driver->owner);
  39                 mutex_unlock(&sst_lock);
  40                 return -EEXIST;
  41         }
  42         dev_dbg(dev->dev, "registering device %s\n", dev->name);
  43         sst = dev;
  44         mutex_unlock(&sst_lock);
  45         return 0;
  46 }
  47 EXPORT_SYMBOL_GPL(sst_register_dsp);
  48
  49 int sst_unregister_dsp(struct sst_device *dev)
  50 {
  51         if (WARN_ON(!dev))
  52                 return -EINVAL;
  53         if (dev != sst)
  54                 return -EINVAL;
  55
  56         mutex_lock(&sst_lock);
  57
  58         if (!sst) {
  59                 mutex_unlock(&sst_lock);
  60                 return -EIO;
  61         }
  62
  63         module_put(sst->dev->driver->owner);
  64         dev_dbg(dev->dev, "unreg %s\n", sst->name);
  65         sst = NULL;
  66         mutex_unlock(&sst_lock);
  67         return 0;
  68 }
  69 EXPORT_SYMBOL_GPL(sst_unregister_dsp);
  70
  71 static const struct snd_pcm_hardware sst_platform_pcm_hw = {
  72         .info = (SNDRV_PCM_INFO_INTERLEAVED |
  73                         SNDRV_PCM_INFO_DOUBLE |
  74                         SNDRV_PCM_INFO_PAUSE |
  75                         SNDRV_PCM_INFO_RESUME |
  76                         SNDRV_PCM_INFO_MMAP|
  77                         SNDRV_PCM_INFO_MMAP_VALID |
  78                         SNDRV_PCM_INFO_BLOCK_TRANSFER |
  79                         SNDRV_PCM_INFO_SYNC_START),
  80         .buffer_bytes_max = SST_MAX_BUFFER,
  81         .period_bytes_min = SST_MIN_PERIOD_BYTES,
  82         .period_bytes_max = SST_MAX_PERIOD_BYTES,
  83         .periods_min = SST_MIN_PERIODS,
  84         .periods_max = SST_MAX_PERIODS,
  85         .fifo_size = SST_FIFO_SIZE,
  86 };
  87
  88 static struct sst_dev_stream_map dpcm_strm_map[] = {
  89         {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF}, /* Reserved, not in use */
  90         {MERR_DPCM_AUDIO, 0, SNDRV_PCM_STREAM_PLAYBACK, PIPE_MEDIA1_IN, SST_TASK_ID_MEDIA, 0},
  91         {MERR_DPCM_COMPR, 0, SNDRV_PCM_STREAM_PLAYBACK, PIPE_MEDIA0_IN, SST_TASK_ID_MEDIA, 0},
  92         {MERR_DPCM_AUDIO, 0, SNDRV_PCM_STREAM_CAPTURE, PIPE_PCM1_OUT, SST_TASK_ID_MEDIA, 0},
  93         {MERR_DPCM_DEEP_BUFFER, 0, SNDRV_PCM_STREAM_PLAYBACK, PIPE_MEDIA3_IN, SST_TASK_ID_MEDIA, 0},
  94 };
  95
  96 static int sst_media_digital_mute(struct snd_soc_dai *dai, int mute, int stream)
  97 {
  98
  99         return sst_send_pipe_gains(dai, stream, mute);
 100 }
 101
 102 /* helper functions */
 103 void sst_set_stream_status(struct sst_runtime_stream *stream,
 104                                         int state)
 105 {
 106         unsigned long flags;
 107         spin_lock_irqsave(&stream->status_lock, flags);
 108         stream->stream_status = state;
 109         spin_unlock_irqrestore(&stream->status_lock, flags);
 110 }
 111
 112 static inline int sst_get_stream_status(struct sst_runtime_stream *stream)
 113 {
 114         int state;
 115         unsigned long flags;
 116
 117         spin_lock_irqsave(&stream->status_lock, flags);
 118         state = stream->stream_status;
 119         spin_unlock_irqrestore(&stream->status_lock, flags);
 120         return state;
 121 }
 122
 123 static void sst_fill_alloc_params(struct snd_pcm_substream *substream,
 124                                 struct snd_sst_alloc_params_ext *alloc_param)
 125 {
 126         unsigned int channels;
 127         snd_pcm_uframes_t period_size;
 128         ssize_t periodbytes;
 129         ssize_t buffer_bytes = snd_pcm_lib_buffer_bytes(substream);
 130         u32 buffer_addr = substream->runtime->dma_addr;
 131
 132         channels = substream->runtime->channels;
 133         period_size = substream->runtime->period_size;
 134         periodbytes = samples_to_bytes(substream->runtime, period_size);
 135         alloc_param->ring_buf_info[0].addr = buffer_addr;
 136         alloc_param->ring_buf_info[0].size = buffer_bytes;
 137         alloc_param->sg_count = 1;
 138         alloc_param->reserved = 0;
 139         alloc_param->frag_size = periodbytes * channels;
 140
 141 }
 142 static void sst_fill_pcm_params(struct snd_pcm_substream *substream,
 143                                 struct snd_sst_stream_params *param)
 144 {
 145         param->uc.pcm_params.num_chan = (u8) substream->runtime->channels;
 146         param->uc.pcm_params.pcm_wd_sz = substream->runtime->sample_bits;
 147         param->uc.pcm_params.sfreq = substream->runtime->rate;
 148
 149         /* PCM stream via ALSA interface */
 150         param->uc.pcm_params.use_offload_path = 0;
 151         param->uc.pcm_params.reserved2 = 0;
 152         memset(param->uc.pcm_params.channel_map, 0, sizeof(u8));
 153
 154 }
 155
 156 static int sst_get_stream_mapping(int dev, int sdev, int dir,
 157         struct sst_dev_stream_map *map, int size)
 158 {
 159         int i;
 160
 161         if (map == NULL)
 162                 return -EINVAL;
 163
 164
 165         /* index 0 is not used in stream map */
 166         for (i = 1; i < size; i++) {
 167                 if ((map[i].dev_num == dev) && (map[i].direction == dir))
 168                         return i;
 169         }
 170         return 0;
 171 }
 172
 173 int sst_fill_stream_params(void *substream,
 174         const struct sst_data *ctx, struct snd_sst_params *str_params, bool is_compress)
 175 {
 176         int map_size;
 177         int index;
 178         struct sst_dev_stream_map *map;
 179         struct snd_pcm_substream *pstream = NULL;
 180         struct snd_compr_stream *cstream = NULL;
 181
 182         map = ctx->pdata->pdev_strm_map;
 183         map_size = ctx->pdata->strm_map_size;
 184
 185         if (is_compress)
 186                 cstream = (struct snd_compr_stream *)substream;
 187         else
 188                 pstream = (struct snd_pcm_substream *)substream;
 189
 190         str_params->stream_type = SST_STREAM_TYPE_MUSIC;
 191
 192         /* For pcm streams */
 193         if (pstream) {
 194                 index = sst_get_stream_mapping(pstream->pcm->device,
 195                                           pstream->number, pstream->stream,
 196                                           map, map_size);
 197                 if (index <= 0)
 198                         return -EINVAL;
 199
 200                 str_params->stream_id = index;
 201                 str_params->device_type = map[index].device_id;
 202                 str_params->task = map[index].task_id;
 203
 204                 str_params->ops = (u8)pstream->stream;
 205         }
 206
 207         if (cstream) {
 208                 index = sst_get_stream_mapping(cstream->device->device,
 209                                                0, cstream->direction,
 210                                                map, map_size);
 211                 if (index <= 0)
 212                         return -EINVAL;
 213                 str_params->stream_id = index;
 214                 str_params->device_type = map[index].device_id;
 215                 str_params->task = map[index].task_id;
 216
 217                 str_params->ops = (u8)cstream->direction;
 218         }
 219         return 0;
 220 }
 221
 222 static int sst_platform_alloc_stream(struct snd_pcm_substream *substream,
 223                 struct snd_soc_dai *dai)
 224 {
 225         struct sst_runtime_stream *stream =
 226                         substream->runtime->private_data;
 227         struct snd_sst_stream_params param = {{{0,},},};
 228         struct snd_sst_params str_params = {0};
 229         struct snd_sst_alloc_params_ext alloc_params = {0};
 230         int ret_val = 0;
 231         struct sst_data *ctx = snd_soc_dai_get_drvdata(dai);
 232
 233         /* set codec params and inform SST driver the same */
 234         sst_fill_pcm_params(substream, &param);
 235         sst_fill_alloc_params(substream, &alloc_params);
 236         str_params.sparams = param;
 237         str_params.aparams = alloc_params;
 238         str_params.codec = SST_CODEC_TYPE_PCM;
 239
 240         /* fill the device type and stream id to pass to SST driver */
 241         ret_val = sst_fill_stream_params(substream, ctx, &str_params, false);
 242         if (ret_val < 0)
 243                 return ret_val;
 244
 245         stream->stream_info.str_id = str_params.stream_id;
 246
 247         ret_val = stream->ops->open(sst->dev, &str_params);
 248         if (ret_val <= 0)
 249                 return ret_val;
 250
 251
 252         return ret_val;
 253 }
 254
 255 static void sst_period_elapsed(void *arg)
 256 {
 257         struct snd_pcm_substream *substream = arg;
 258         struct sst_runtime_stream *stream;
 259         int status;
 260
 261         if (!substream || !substream->runtime)
 262                 return;
 263         stream = substream->runtime->private_data;
 264         if (!stream)
 265                 return;
 266         status = sst_get_stream_status(stream);
 267         if (status != SST_PLATFORM_RUNNING)
 268                 return;
 269         snd_pcm_period_elapsed(substream);
 270 }
 271
 272 static int sst_platform_init_stream(struct snd_pcm_substream *substream)
 273 {
 274         struct sst_runtime_stream *stream =
 275                         substream->runtime->private_data;
 276         struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
 277         int ret_val;
 278
 279         dev_dbg(rtd->dev, "setting buffer ptr param\n");
 280         sst_set_stream_status(stream, SST_PLATFORM_INIT);
 281         stream->stream_info.period_elapsed = sst_period_elapsed;
 282         stream->stream_info.arg = substream;
 283         stream->stream_info.buffer_ptr = 0;
 284         stream->stream_info.sfreq = substream->runtime->rate;
 285         ret_val = stream->ops->stream_init(sst->dev, &stream->stream_info);
 286         if (ret_val)
 287                 dev_err(rtd->dev, "control_set ret error %d\n", ret_val);
 288         return ret_val;
 289
 290 }
 291
 292 static int power_up_sst(struct sst_runtime_stream *stream)
 293 {
 294         return stream->ops->power(sst->dev, true);
 295 }
 296
 297 static void power_down_sst(struct sst_runtime_stream *stream)
 298 {
 299         stream->ops->power(sst->dev, false);
 300 }
 301
 302 static int sst_media_open(struct snd_pcm_substream *substream,
 303                 struct snd_soc_dai *dai)
 304 {
 305         int ret_val = 0;
 306         struct snd_pcm_runtime *runtime = substream->runtime;
 307         struct sst_runtime_stream *stream;
 308
 309         stream = kzalloc(sizeof(*stream), GFP_KERNEL);
 310         if (!stream)
 311                 return -ENOMEM;
 312         spin_lock_init(&stream->status_lock);
 313
 314         /* get the sst ops */
 315         mutex_lock(&sst_lock);
 316         if (!sst ||
 317             !try_module_get(sst->dev->driver->owner)) {
 318                 dev_err(dai->dev, "no device available to run\n");
 319                 ret_val = -ENODEV;
 320                 goto out_ops;
 321         }
 322         stream->ops = sst->ops;
 323         mutex_unlock(&sst_lock);
 324
 325         stream->stream_info.str_id = 0;
 326
 327         stream->stream_info.arg = substream;
 328         /* allocate memory for SST API set */
 329         runtime->private_data = stream;
 330
 331         ret_val = power_up_sst(stream);
 332         if (ret_val < 0)
 333                 goto out_power_up;
 334
 335         /*
 336          * Make sure the period to be multiple of 1ms to align the
 337          * design of firmware. Apply same rule to buffer size to make
 338          * sure alsa could always find a value for period size
 339          * regardless the buffer size given by user space.
 340          */
 341         snd_pcm_hw_constraint_step(substream->runtime, 0,
 342                            SNDRV_PCM_HW_PARAM_PERIOD_SIZE, 48);
 343         snd_pcm_hw_constraint_step(substream->runtime, 0,
 344                            SNDRV_PCM_HW_PARAM_BUFFER_SIZE, 48);
 345
 346         /* Make sure, that the period size is always even */
 347         snd_pcm_hw_constraint_step(substream->runtime, 0,
 348                            SNDRV_PCM_HW_PARAM_PERIODS, 2);
 349
 350         return snd_pcm_hw_constraint_integer(runtime,
 351                          SNDRV_PCM_HW_PARAM_PERIODS);
 352 out_ops:
 353         mutex_unlock(&sst_lock);
 354 out_power_up:
 355         kfree(stream);
 356         return ret_val;
 357 }
 358
 359 static void sst_media_close(struct snd_pcm_substream *substream,
 360                 struct snd_soc_dai *dai)
 361 {
 362         struct sst_runtime_stream *stream;
 363         int str_id;
 364
 365         stream = substream->runtime->private_data;
 366         power_down_sst(stream);
 367
 368         str_id = stream->stream_info.str_id;
 369         if (str_id)
 370                 stream->ops->close(sst->dev, str_id);
 371         module_put(sst->dev->driver->owner);
 372         kfree(stream);
 373 }
 374
 375 static int sst_media_prepare(struct snd_pcm_substream *substream,
 376                 struct snd_soc_dai *dai)
 377 {
 378         struct sst_runtime_stream *stream;
 379         int ret_val, str_id;
 380
 381         stream = substream->runtime->private_data;
 382         str_id = stream->stream_info.str_id;
 383         if (stream->stream_info.str_id) {
 384                 ret_val = stream->ops->stream_drop(sst->dev, str_id);
 385                 return ret_val;
 386         }
 387
 388         ret_val = sst_platform_alloc_stream(substream, dai);
 389         if (ret_val <= 0)
 390                 return ret_val;
 391         snprintf(substream->pcm->id, sizeof(substream->pcm->id),
 392                         "%d", stream->stream_info.str_id);
 393
 394         ret_val = sst_platform_init_stream(substream);
 395         if (ret_val)
 396                 return ret_val;
 397         substream->runtime->hw.info = SNDRV_PCM_INFO_BLOCK_TRANSFER;
 398         return 0;
 399 }
 400
 401 static int sst_enable_ssp(struct snd_pcm_substream *substream,
 402                         struct snd_soc_dai *dai)
 403 {
 404         int ret = 0;
 405
 406         if (!snd_soc_dai_active(dai)) {
 407                 ret = sst_handle_vb_timer(dai, true);
 408                 sst_fill_ssp_defaults(dai);
 409         }
 410         return ret;
 411 }
 412
 413 static int sst_be_hw_params(struct snd_pcm_substream *substream,
 414                                 struct snd_pcm_hw_params *params,
 415                                 struct snd_soc_dai *dai)
 416 {
 417         int ret = 0;
 418
 419         if (snd_soc_dai_active(dai) == 1)
 420                 ret = send_ssp_cmd(dai, dai->name, 1);
 421         return ret;
 422 }
 423
 424 static int sst_set_format(struct snd_soc_dai *dai, unsigned int fmt)
 425 {
 426         int ret = 0;
 427
 428         if (!snd_soc_dai_active(dai))
 429                 return 0;
 430
 431         ret = sst_fill_ssp_config(dai, fmt);
 432         if (ret < 0)
 433                 dev_err(dai->dev, "sst_set_format failed..\n");
 434
 435         return ret;
 436 }
 437
 438 static int sst_platform_set_ssp_slot(struct snd_soc_dai *dai,
 439                         unsigned int tx_mask, unsigned int rx_mask,
 440                         int slots, int slot_width) {
 441         int ret = 0;
 442
 443         if (!snd_soc_dai_active(dai))
 444                 return ret;
 445
 446         ret = sst_fill_ssp_slot(dai, tx_mask, rx_mask, slots, slot_width);
 447         if (ret < 0)
 448                 dev_err(dai->dev, "sst_fill_ssp_slot failed..%d\n", ret);
 449
 450         return ret;
 451 }
 452
 453 static void sst_disable_ssp(struct snd_pcm_substream *substream,
 454                         struct snd_soc_dai *dai)
 455 {
 456         if (!snd_soc_dai_active(dai)) {
 457                 send_ssp_cmd(dai, dai->name, 0);
 458                 sst_handle_vb_timer(dai, false);
 459         }
 460 }
 461
 462 static const struct snd_soc_dai_ops sst_media_dai_ops = {
 463         .startup = sst_media_open,
 464         .shutdown = sst_media_close,
 465         .prepare = sst_media_prepare,
 466         .mute_stream = sst_media_digital_mute,
 467 };
 468
 469 static const struct snd_soc_dai_ops sst_compr_dai_ops = {
 470         .mute_stream = sst_media_digital_mute,
 471 };
 472
 473 static const struct snd_soc_dai_ops sst_be_dai_ops = {
 474         .startup = sst_enable_ssp,
 475         .hw_params = sst_be_hw_params,
 476         .set_fmt = sst_set_format,
 477         .set_tdm_slot = sst_platform_set_ssp_slot,
 478         .shutdown = sst_disable_ssp,
 479 };
 480
 481 static struct snd_soc_dai_driver sst_platform_dai[] = {
 482 {
 483         .name = "media-cpu-dai",
 484         .ops = &sst_media_dai_ops,
 485         .playback = {
 486                 .stream_name = "Headset Playback",
 487                 .channels_min = SST_STEREO,
 488                 .channels_max = SST_STEREO,
 489                 .rates = SNDRV_PCM_RATE_48000,
 490                 .formats = SNDRV_PCM_FMTBIT_S16_LE,
 491         },
 492         .capture = {
 493                 .stream_name = "Headset Capture",
 494                 .channels_min = 1,
 495                 .channels_max = 2,
 496                 .rates = SNDRV_PCM_RATE_48000,
 497                 .formats = SNDRV_PCM_FMTBIT_S16_LE,
 498         },
 499 },
 500 {
 501         .name = "deepbuffer-cpu-dai",
 502         .ops = &sst_media_dai_ops,
 503         .playback = {
 504                 .stream_name = "Deepbuffer Playback",
 505                 .channels_min = SST_STEREO,
 506                 .channels_max = SST_STEREO,
 507                 .rates = SNDRV_PCM_RATE_48000,
 508                 .formats = SNDRV_PCM_FMTBIT_S16_LE,
 509         },
 510 },
 511 {
 512         .name = "compress-cpu-dai",
 513         .compress_new = snd_soc_new_compress,
 514         .ops = &sst_compr_dai_ops,
 515         .playback = {
 516                 .stream_name = "Compress Playback",
 517                 .channels_min = 1,
 518         },
 519 },
 520 /* BE CPU  Dais */
 521 {
 522         .name = "ssp0-port",
 523         .ops = &sst_be_dai_ops,
 524         .playback = {
 525                 .stream_name = "ssp0 Tx",
 526                 .channels_min = SST_STEREO,
 527                 .channels_max = SST_STEREO,
 528                 .rates = SNDRV_PCM_RATE_48000,
 529                 .formats = SNDRV_PCM_FMTBIT_S16_LE,
 530         },
 531         .capture = {
 532                 .stream_name = "ssp0 Rx",
 533                 .channels_min = SST_STEREO,
 534                 .channels_max = SST_STEREO,
 535                 .rates = SNDRV_PCM_RATE_48000,
 536                 .formats = SNDRV_PCM_FMTBIT_S16_LE,
 537         },
 538 },
 539 {
 540         .name = "ssp1-port",
 541         .ops = &sst_be_dai_ops,
 542         .playback = {
 543                 .stream_name = "ssp1 Tx",
 544                 .channels_min = SST_STEREO,
 545                 .channels_max = SST_STEREO,
 546                 .rates = SNDRV_PCM_RATE_8000|SNDRV_PCM_RATE_16000|SNDRV_PCM_RATE_48000,
 547                 .formats = SNDRV_PCM_FMTBIT_S16_LE,
 548         },
 549         .capture = {
 550                 .stream_name = "ssp1 Rx",
 551                 .channels_min = SST_STEREO,
 552                 .channels_max = SST_STEREO,
 553                 .rates = SNDRV_PCM_RATE_8000|SNDRV_PCM_RATE_16000|SNDRV_PCM_RATE_48000,
 554                 .formats = SNDRV_PCM_FMTBIT_S16_LE,
 555         },
 556 },
 557 {
 558         .name = "ssp2-port",
 559         .ops = &sst_be_dai_ops,
 560         .playback = {
 561                 .stream_name = "ssp2 Tx",
 562                 .channels_min = SST_STEREO,
 563                 .channels_max = SST_STEREO,
 564                 .rates = SNDRV_PCM_RATE_48000,
 565                 .formats = SNDRV_PCM_FMTBIT_S16_LE,
 566         },
 567         .capture = {
 568                 .stream_name = "ssp2 Rx",
 569                 .channels_min = SST_STEREO,
 570                 .channels_max = SST_STEREO,
 571                 .rates = SNDRV_PCM_RATE_48000,
 572                 .formats = SNDRV_PCM_FMTBIT_S16_LE,
 573         },
 574 },
 575 };
 576
 577 static int sst_soc_open(struct snd_soc_component *component,
 578                         struct snd_pcm_substream *substream)
 579 {
 580         struct snd_pcm_runtime *runtime;
 581
 582         if (substream->pcm->internal)
 583                 return 0;
 584
 585         runtime = substream->runtime;
 586         runtime->hw = sst_platform_pcm_hw;
 587         return 0;
 588 }
 589
 590 static int sst_soc_trigger(struct snd_soc_component *component,
 591                            struct snd_pcm_substream *substream, int cmd)
 592 {
 593         int ret_val = 0, str_id;
 594         struct sst_runtime_stream *stream;
 595         int status;
 596         struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
 597
 598         dev_dbg(rtd->dev, "%s called\n", __func__);
 599         if (substream->pcm->internal)
 600                 return 0;
 601         stream = substream->runtime->private_data;
 602         str_id = stream->stream_info.str_id;
 603         switch (cmd) {
 604         case SNDRV_PCM_TRIGGER_START:
 605                 dev_dbg(rtd->dev, "sst: Trigger Start\n");
 606                 status = SST_PLATFORM_RUNNING;
 607                 stream->stream_info.arg = substream;
 608                 ret_val = stream->ops->stream_start(sst->dev, str_id);
 609                 break;
 610         case SNDRV_PCM_TRIGGER_STOP:
 611                 dev_dbg(rtd->dev, "sst: in stop\n");
 612                 status = SST_PLATFORM_DROPPED;
 613                 ret_val = stream->ops->stream_drop(sst->dev, str_id);
 614                 break;
 615         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
 616         case SNDRV_PCM_TRIGGER_SUSPEND:
 617                 dev_dbg(rtd->dev, "sst: in pause\n");
 618                 status = SST_PLATFORM_PAUSED;
 619                 ret_val = stream->ops->stream_pause(sst->dev, str_id);
 620                 break;
 621         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
 622         case SNDRV_PCM_TRIGGER_RESUME:
 623                 dev_dbg(rtd->dev, "sst: in pause release\n");
 624                 status = SST_PLATFORM_RUNNING;
 625                 ret_val = stream->ops->stream_pause_release(sst->dev, str_id);
 626                 break;
 627         default:
 628                 return -EINVAL;
 629         }
 630
 631         if (!ret_val)
 632                 sst_set_stream_status(stream, status);
 633
 634         return ret_val;
 635 }
 636
 637
 638 static snd_pcm_uframes_t sst_soc_pointer(struct snd_soc_component *component,
 639                                          struct snd_pcm_substream *substream)
 640 {
 641         struct sst_runtime_stream *stream;
 642         int ret_val, status;
 643         struct pcm_stream_info *str_info;
 644         struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
 645
 646         stream = substream->runtime->private_data;
 647         status = sst_get_stream_status(stream);
 648         if (status == SST_PLATFORM_INIT)
 649                 return 0;
 650         str_info = &stream->stream_info;
 651         ret_val = stream->ops->stream_read_tstamp(sst->dev, str_info);
 652         if (ret_val) {
 653                 dev_err(rtd->dev, "sst: error code = %d\n", ret_val);
 654                 return ret_val;
 655         }
 656         substream->runtime->delay = str_info->pcm_delay;
 657         return str_info->buffer_ptr;
 658 }
 659
 660 static int sst_soc_pcm_new(struct snd_soc_component *component,
 661                            struct snd_soc_pcm_runtime *rtd)
 662 {
 663         struct snd_soc_dai *dai = asoc_rtd_to_cpu(rtd, 0);
 664         struct snd_pcm *pcm = rtd->pcm;
 665
 666         if (dai->driver->playback.channels_min ||
 667                         dai->driver->capture.channels_min) {
 668                 snd_pcm_set_managed_buffer_all(pcm,
 669                         SNDRV_DMA_TYPE_CONTINUOUS,
 670                         snd_dma_continuous_data(GFP_DMA),
 671                         SST_MIN_BUFFER, SST_MAX_BUFFER);
 672         }
 673         return 0;
 674 }
 675
 676 static int sst_soc_probe(struct snd_soc_component *component)
 677 {
 678         struct sst_data *drv = dev_get_drvdata(component->dev);
 679
 680         drv->soc_card = component->card;
 681         return sst_dsp_init_v2_dpcm(component);
 682 }
 683
 684 static void sst_soc_remove(struct snd_soc_component *component)
 685 {
 686         struct sst_data *drv = dev_get_drvdata(component->dev);
 687
 688         drv->soc_card = NULL;
 689 }
 690
 691 static const struct snd_soc_component_driver sst_soc_platform_drv  = {
 692         .name           = DRV_NAME,
 693         .probe          = sst_soc_probe,
 694         .remove         = sst_soc_remove,
 695         .open           = sst_soc_open,
 696         .trigger        = sst_soc_trigger,
 697         .pointer        = sst_soc_pointer,
 698         .compress_ops   = &sst_platform_compress_ops,
 699         .pcm_construct  = sst_soc_pcm_new,
 700 };
 701
 702 static int sst_platform_probe(struct platform_device *pdev)
 703 {
 704         struct sst_data *drv;
 705         int ret;
 706         struct sst_platform_data *pdata;
 707
 708         drv = devm_kzalloc(&pdev->dev, sizeof(*drv), GFP_KERNEL);
 709         if (drv == NULL) {
 710                 return -ENOMEM;
 711         }
 712
 713         pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
 714         if (pdata == NULL) {
 715                 return -ENOMEM;
 716         }
 717
 718         pdata->pdev_strm_map = dpcm_strm_map;
 719         pdata->strm_map_size = ARRAY_SIZE(dpcm_strm_map);
 720         drv->pdata = pdata;
 721         drv->pdev = pdev;
 722         mutex_init(&drv->lock);
 723         dev_set_drvdata(&pdev->dev, drv);
 724
 725         ret = devm_snd_soc_register_component(&pdev->dev, &sst_soc_platform_drv,
 726                                 sst_platform_dai, ARRAY_SIZE(sst_platform_dai));
 727         if (ret)
 728                 dev_err(&pdev->dev, "registering cpu dais failed\n");
 729
 730         return ret;
 731 }
 732
 733 static int sst_platform_remove(struct platform_device *pdev)
 734 {
 735         dev_dbg(&pdev->dev, "sst_platform_remove success\n");
 736         return 0;
 737 }
 738
 739 #ifdef CONFIG_PM_SLEEP
 740
 741 static int sst_soc_prepare(struct device *dev)
 742 {
 743         struct sst_data *drv = dev_get_drvdata(dev);
 744         struct snd_soc_pcm_runtime *rtd;
 745
 746         if (!drv->soc_card)
 747                 return 0;
 748
 749         /* suspend all pcms first */
 750         snd_soc_suspend(drv->soc_card->dev);
 751         snd_soc_poweroff(drv->soc_card->dev);
 752
 753         /* set the SSPs to idle */
 754         for_each_card_rtds(drv->soc_card, rtd) {
 755                 struct snd_soc_dai *dai = asoc_rtd_to_cpu(rtd, 0);
 756
 757                 if (snd_soc_dai_active(dai)) {
 758                         send_ssp_cmd(dai, dai->name, 0);
 759                         sst_handle_vb_timer(dai, false);
 760                 }
 761         }
 762
 763         return 0;
 764 }
 765
 766 static void sst_soc_complete(struct device *dev)
 767 {
 768         struct sst_data *drv = dev_get_drvdata(dev);
 769         struct snd_soc_pcm_runtime *rtd;
 770
 771         if (!drv->soc_card)
 772                 return;
 773
 774         /* restart SSPs */
 775         for_each_card_rtds(drv->soc_card, rtd) {
 776                 struct snd_soc_dai *dai = asoc_rtd_to_cpu(rtd, 0);
 777
 778                 if (snd_soc_dai_active(dai)) {
 779                         sst_handle_vb_timer(dai, true);
 780                         send_ssp_cmd(dai, dai->name, 1);
 781                 }
 782         }
 783         snd_soc_resume(drv->soc_card->dev);
 784 }
 785
 786 #else
 787
 788 #define sst_soc_prepare NULL
 789 #define sst_soc_complete NULL
 790
 791 #endif
 792
 793
 794 static const struct dev_pm_ops sst_platform_pm = {
 795         .prepare        = sst_soc_prepare,
 796         .complete       = sst_soc_complete,
 797 };
 798
 799 static struct platform_driver sst_platform_driver = {
 800         .driver         = {
 801                 .name           = "sst-mfld-platform",
 802                 .pm             = &sst_platform_pm,
 803         },
 804         .probe          = sst_platform_probe,
 805         .remove         = sst_platform_remove,
 806 };
 807
 808 module_platform_driver(sst_platform_driver);
 809
 810 MODULE_DESCRIPTION("ASoC Intel(R) MID Platform driver");
 811 MODULE_AUTHOR("Vinod Koul <vinod.koul@intel.com>");
 812 MODULE_AUTHOR("Harsha Priya <priya.harsha@intel.com>");
 813 MODULE_LICENSE("GPL v2");
 814 MODULE_ALIAS("platform:sst-atom-hifi2-platform");
 815 MODULE_ALIAS("platform:sst-mfld-platform");