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 = virt_to_phys(substream->dma_buffer.area);
 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         substream->runtime->dma_area = substream->dma_buffer.area;
 237         str_params.sparams = param;
 238         str_params.aparams = alloc_params;
 239         str_params.codec = SST_CODEC_TYPE_PCM;
 240
 241         /* fill the device type and stream id to pass to SST driver */
 242         ret_val = sst_fill_stream_params(substream, ctx, &str_params, false);
 243         if (ret_val < 0)
 244                 return ret_val;
 245
 246         stream->stream_info.str_id = str_params.stream_id;
 247
 248         ret_val = stream->ops->open(sst->dev, &str_params);
 249         if (ret_val <= 0)
 250                 return ret_val;
 251
 252
 253         return ret_val;
 254 }
 255
 256 static void sst_period_elapsed(void *arg)
 257 {
 258         struct snd_pcm_substream *substream = arg;
 259         struct sst_runtime_stream *stream;
 260         int status;
 261
 262         if (!substream || !substream->runtime)
 263                 return;
 264         stream = substream->runtime->private_data;
 265         if (!stream)
 266                 return;
 267         status = sst_get_stream_status(stream);
 268         if (status != SST_PLATFORM_RUNNING)
 269                 return;
 270         snd_pcm_period_elapsed(substream);
 271 }
 272
 273 static int sst_platform_init_stream(struct snd_pcm_substream *substream)
 274 {
 275         struct sst_runtime_stream *stream =
 276                         substream->runtime->private_data;
 277         struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
 278         int ret_val;
 279
 280         dev_dbg(rtd->dev, "setting buffer ptr param\n");
 281         sst_set_stream_status(stream, SST_PLATFORM_INIT);
 282         stream->stream_info.period_elapsed = sst_period_elapsed;
 283         stream->stream_info.arg = substream;
 284         stream->stream_info.buffer_ptr = 0;
 285         stream->stream_info.sfreq = substream->runtime->rate;
 286         ret_val = stream->ops->stream_init(sst->dev, &stream->stream_info);
 287         if (ret_val)
 288                 dev_err(rtd->dev, "control_set ret error %d\n", ret_val);
 289         return ret_val;
 290
 291 }
 292
 293 static int power_up_sst(struct sst_runtime_stream *stream)
 294 {
 295         return stream->ops->power(sst->dev, true);
 296 }
 297
 298 static void power_down_sst(struct sst_runtime_stream *stream)
 299 {
 300         stream->ops->power(sst->dev, false);
 301 }
 302
 303 static int sst_media_open(struct snd_pcm_substream *substream,
 304                 struct snd_soc_dai *dai)
 305 {
 306         int ret_val = 0;
 307         struct snd_pcm_runtime *runtime = substream->runtime;
 308         struct sst_runtime_stream *stream;
 309
 310         stream = kzalloc(sizeof(*stream), GFP_KERNEL);
 311         if (!stream)
 312                 return -ENOMEM;
 313         spin_lock_init(&stream->status_lock);
 314
 315         /* get the sst ops */
 316         mutex_lock(&sst_lock);
 317         if (!sst ||
 318             !try_module_get(sst->dev->driver->owner)) {
 319                 dev_err(dai->dev, "no device available to run\n");
 320                 ret_val = -ENODEV;
 321                 goto out_ops;
 322         }
 323         stream->ops = sst->ops;
 324         mutex_unlock(&sst_lock);
 325
 326         stream->stream_info.str_id = 0;
 327
 328         stream->stream_info.arg = substream;
 329         /* allocate memory for SST API set */
 330         runtime->private_data = stream;
 331
 332         ret_val = power_up_sst(stream);
 333         if (ret_val < 0)
 334                 return ret_val;
 335
 336         /* Make sure, that the period size is always even */
 337         snd_pcm_hw_constraint_step(substream->runtime, 0,
 338                            SNDRV_PCM_HW_PARAM_PERIODS, 2);
 339
 340         return snd_pcm_hw_constraint_integer(runtime,
 341                          SNDRV_PCM_HW_PARAM_PERIODS);
 342 out_ops:
 343         kfree(stream);
 344         mutex_unlock(&sst_lock);
 345         return ret_val;
 346 }
 347
 348 static void sst_media_close(struct snd_pcm_substream *substream,
 349                 struct snd_soc_dai *dai)
 350 {
 351         struct sst_runtime_stream *stream;
 352         int str_id;
 353
 354         stream = substream->runtime->private_data;
 355         power_down_sst(stream);
 356
 357         str_id = stream->stream_info.str_id;
 358         if (str_id)
 359                 stream->ops->close(sst->dev, str_id);
 360         module_put(sst->dev->driver->owner);
 361         kfree(stream);
 362 }
 363
 364 static int sst_media_prepare(struct snd_pcm_substream *substream,
 365                 struct snd_soc_dai *dai)
 366 {
 367         struct sst_runtime_stream *stream;
 368         int ret_val = 0, str_id;
 369
 370         stream = substream->runtime->private_data;
 371         str_id = stream->stream_info.str_id;
 372         if (stream->stream_info.str_id) {
 373                 ret_val = stream->ops->stream_drop(sst->dev, str_id);
 374                 return ret_val;
 375         }
 376
 377         ret_val = sst_platform_alloc_stream(substream, dai);
 378         if (ret_val <= 0)
 379                 return ret_val;
 380         snprintf(substream->pcm->id, sizeof(substream->pcm->id),
 381                         "%d", stream->stream_info.str_id);
 382
 383         ret_val = sst_platform_init_stream(substream);
 384         if (ret_val)
 385                 return ret_val;
 386         substream->runtime->hw.info = SNDRV_PCM_INFO_BLOCK_TRANSFER;
 387         return ret_val;
 388 }
 389
 390 static int sst_enable_ssp(struct snd_pcm_substream *substream,
 391                         struct snd_soc_dai *dai)
 392 {
 393         int ret = 0;
 394
 395         if (!snd_soc_dai_active(dai)) {
 396                 ret = sst_handle_vb_timer(dai, true);
 397                 sst_fill_ssp_defaults(dai);
 398         }
 399         return ret;
 400 }
 401
 402 static int sst_be_hw_params(struct snd_pcm_substream *substream,
 403                                 struct snd_pcm_hw_params *params,
 404                                 struct snd_soc_dai *dai)
 405 {
 406         int ret = 0;
 407
 408         if (snd_soc_dai_active(dai) == 1)
 409                 ret = send_ssp_cmd(dai, dai->name, 1);
 410         return ret;
 411 }
 412
 413 static int sst_set_format(struct snd_soc_dai *dai, unsigned int fmt)
 414 {
 415         int ret = 0;
 416
 417         if (!snd_soc_dai_active(dai))
 418                 return 0;
 419
 420         ret = sst_fill_ssp_config(dai, fmt);
 421         if (ret < 0)
 422                 dev_err(dai->dev, "sst_set_format failed..\n");
 423
 424         return ret;
 425 }
 426
 427 static int sst_platform_set_ssp_slot(struct snd_soc_dai *dai,
 428                         unsigned int tx_mask, unsigned int rx_mask,
 429                         int slots, int slot_width) {
 430         int ret = 0;
 431
 432         if (!snd_soc_dai_active(dai))
 433                 return ret;
 434
 435         ret = sst_fill_ssp_slot(dai, tx_mask, rx_mask, slots, slot_width);
 436         if (ret < 0)
 437                 dev_err(dai->dev, "sst_fill_ssp_slot failed..%d\n", ret);
 438
 439         return ret;
 440 }
 441
 442 static void sst_disable_ssp(struct snd_pcm_substream *substream,
 443                         struct snd_soc_dai *dai)
 444 {
 445         if (!snd_soc_dai_active(dai)) {
 446                 send_ssp_cmd(dai, dai->name, 0);
 447                 sst_handle_vb_timer(dai, false);
 448         }
 449 }
 450
 451 static const struct snd_soc_dai_ops sst_media_dai_ops = {
 452         .startup = sst_media_open,
 453         .shutdown = sst_media_close,
 454         .prepare = sst_media_prepare,
 455         .mute_stream = sst_media_digital_mute,
 456 };
 457
 458 static const struct snd_soc_dai_ops sst_compr_dai_ops = {
 459         .mute_stream = sst_media_digital_mute,
 460 };
 461
 462 static const struct snd_soc_dai_ops sst_be_dai_ops = {
 463         .startup = sst_enable_ssp,
 464         .hw_params = sst_be_hw_params,
 465         .set_fmt = sst_set_format,
 466         .set_tdm_slot = sst_platform_set_ssp_slot,
 467         .shutdown = sst_disable_ssp,
 468 };
 469
 470 static struct snd_soc_dai_driver sst_platform_dai[] = {
 471 {
 472         .name = "media-cpu-dai",
 473         .ops = &sst_media_dai_ops,
 474         .playback = {
 475                 .stream_name = "Headset Playback",
 476                 .channels_min = SST_STEREO,
 477                 .channels_max = SST_STEREO,
 478                 .rates = SNDRV_PCM_RATE_44100|SNDRV_PCM_RATE_48000,
 479                 .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE,
 480         },
 481         .capture = {
 482                 .stream_name = "Headset Capture",
 483                 .channels_min = 1,
 484                 .channels_max = 2,
 485                 .rates = SNDRV_PCM_RATE_44100|SNDRV_PCM_RATE_48000,
 486                 .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE,
 487         },
 488 },
 489 {
 490         .name = "deepbuffer-cpu-dai",
 491         .ops = &sst_media_dai_ops,
 492         .playback = {
 493                 .stream_name = "Deepbuffer Playback",
 494                 .channels_min = SST_STEREO,
 495                 .channels_max = SST_STEREO,
 496                 .rates = SNDRV_PCM_RATE_44100|SNDRV_PCM_RATE_48000,
 497                 .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE,
 498         },
 499 },
 500 {
 501         .name = "compress-cpu-dai",
 502         .compress_new = snd_soc_new_compress,
 503         .ops = &sst_compr_dai_ops,
 504         .playback = {
 505                 .stream_name = "Compress Playback",
 506                 .channels_min = 1,
 507         },
 508 },
 509 /* BE CPU  Dais */
 510 {
 511         .name = "ssp0-port",
 512         .ops = &sst_be_dai_ops,
 513         .playback = {
 514                 .stream_name = "ssp0 Tx",
 515                 .channels_min = SST_STEREO,
 516                 .channels_max = SST_STEREO,
 517                 .rates = SNDRV_PCM_RATE_48000,
 518                 .formats = SNDRV_PCM_FMTBIT_S16_LE,
 519         },
 520         .capture = {
 521                 .stream_name = "ssp0 Rx",
 522                 .channels_min = SST_STEREO,
 523                 .channels_max = SST_STEREO,
 524                 .rates = SNDRV_PCM_RATE_48000,
 525                 .formats = SNDRV_PCM_FMTBIT_S16_LE,
 526         },
 527 },
 528 {
 529         .name = "ssp1-port",
 530         .ops = &sst_be_dai_ops,
 531         .playback = {
 532                 .stream_name = "ssp1 Tx",
 533                 .channels_min = SST_STEREO,
 534                 .channels_max = SST_STEREO,
 535                 .rates = SNDRV_PCM_RATE_8000|SNDRV_PCM_RATE_16000|SNDRV_PCM_RATE_48000,
 536                 .formats = SNDRV_PCM_FMTBIT_S16_LE,
 537         },
 538         .capture = {
 539                 .stream_name = "ssp1 Rx",
 540                 .channels_min = SST_STEREO,
 541                 .channels_max = SST_STEREO,
 542                 .rates = SNDRV_PCM_RATE_8000|SNDRV_PCM_RATE_16000|SNDRV_PCM_RATE_48000,
 543                 .formats = SNDRV_PCM_FMTBIT_S16_LE,
 544         },
 545 },
 546 {
 547         .name = "ssp2-port",
 548         .ops = &sst_be_dai_ops,
 549         .playback = {
 550                 .stream_name = "ssp2 Tx",
 551                 .channels_min = SST_STEREO,
 552                 .channels_max = SST_STEREO,
 553                 .rates = SNDRV_PCM_RATE_48000,
 554                 .formats = SNDRV_PCM_FMTBIT_S16_LE,
 555         },
 556         .capture = {
 557                 .stream_name = "ssp2 Rx",
 558                 .channels_min = SST_STEREO,
 559                 .channels_max = SST_STEREO,
 560                 .rates = SNDRV_PCM_RATE_48000,
 561                 .formats = SNDRV_PCM_FMTBIT_S16_LE,
 562         },
 563 },
 564 };
 565
 566 static int sst_soc_open(struct snd_soc_component *component,
 567                         struct snd_pcm_substream *substream)
 568 {
 569         struct snd_pcm_runtime *runtime;
 570
 571         if (substream->pcm->internal)
 572                 return 0;
 573
 574         runtime = substream->runtime;
 575         runtime->hw = sst_platform_pcm_hw;
 576         return 0;
 577 }
 578
 579 static int sst_soc_trigger(struct snd_soc_component *component,
 580                            struct snd_pcm_substream *substream, int cmd)
 581 {
 582         int ret_val = 0, str_id;
 583         struct sst_runtime_stream *stream;
 584         int status;
 585         struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
 586
 587         dev_dbg(rtd->dev, "%s called\n", __func__);
 588         if (substream->pcm->internal)
 589                 return 0;
 590         stream = substream->runtime->private_data;
 591         str_id = stream->stream_info.str_id;
 592         switch (cmd) {
 593         case SNDRV_PCM_TRIGGER_START:
 594                 dev_dbg(rtd->dev, "sst: Trigger Start\n");
 595                 status = SST_PLATFORM_RUNNING;
 596                 stream->stream_info.arg = substream;
 597                 ret_val = stream->ops->stream_start(sst->dev, str_id);
 598                 break;
 599         case SNDRV_PCM_TRIGGER_STOP:
 600                 dev_dbg(rtd->dev, "sst: in stop\n");
 601                 status = SST_PLATFORM_DROPPED;
 602                 ret_val = stream->ops->stream_drop(sst->dev, str_id);
 603                 break;
 604         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
 605         case SNDRV_PCM_TRIGGER_SUSPEND:
 606                 dev_dbg(rtd->dev, "sst: in pause\n");
 607                 status = SST_PLATFORM_PAUSED;
 608                 ret_val = stream->ops->stream_pause(sst->dev, str_id);
 609                 break;
 610         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
 611         case SNDRV_PCM_TRIGGER_RESUME:
 612                 dev_dbg(rtd->dev, "sst: in pause release\n");
 613                 status = SST_PLATFORM_RUNNING;
 614                 ret_val = stream->ops->stream_pause_release(sst->dev, str_id);
 615                 break;
 616         default:
 617                 return -EINVAL;
 618         }
 619
 620         if (!ret_val)
 621                 sst_set_stream_status(stream, status);
 622
 623         return ret_val;
 624 }
 625
 626
 627 static snd_pcm_uframes_t sst_soc_pointer(struct snd_soc_component *component,
 628                                          struct snd_pcm_substream *substream)
 629 {
 630         struct sst_runtime_stream *stream;
 631         int ret_val, status;
 632         struct pcm_stream_info *str_info;
 633         struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
 634
 635         stream = substream->runtime->private_data;
 636         status = sst_get_stream_status(stream);
 637         if (status == SST_PLATFORM_INIT)
 638                 return 0;
 639         str_info = &stream->stream_info;
 640         ret_val = stream->ops->stream_read_tstamp(sst->dev, str_info);
 641         if (ret_val) {
 642                 dev_err(rtd->dev, "sst: error code = %d\n", ret_val);
 643                 return ret_val;
 644         }
 645         substream->runtime->delay = str_info->pcm_delay;
 646         return str_info->buffer_ptr;
 647 }
 648
 649 static int sst_soc_pcm_new(struct snd_soc_component *component,
 650                            struct snd_soc_pcm_runtime *rtd)
 651 {
 652         struct snd_soc_dai *dai = asoc_rtd_to_cpu(rtd, 0);
 653         struct snd_pcm *pcm = rtd->pcm;
 654
 655         if (dai->driver->playback.channels_min ||
 656                         dai->driver->capture.channels_min) {
 657                 snd_pcm_set_managed_buffer_all(pcm,
 658                         SNDRV_DMA_TYPE_CONTINUOUS,
 659                         snd_dma_continuous_data(GFP_DMA),
 660                         SST_MIN_BUFFER, SST_MAX_BUFFER);
 661         }
 662         return 0;
 663 }
 664
 665 static int sst_soc_probe(struct snd_soc_component *component)
 666 {
 667         struct sst_data *drv = dev_get_drvdata(component->dev);
 668
 669         drv->soc_card = component->card;
 670         return sst_dsp_init_v2_dpcm(component);
 671 }
 672
 673 static void sst_soc_remove(struct snd_soc_component *component)
 674 {
 675         struct sst_data *drv = dev_get_drvdata(component->dev);
 676
 677         drv->soc_card = NULL;
 678 }
 679
 680 static const struct snd_soc_component_driver sst_soc_platform_drv  = {
 681         .name           = DRV_NAME,
 682         .probe          = sst_soc_probe,
 683         .remove         = sst_soc_remove,
 684         .open           = sst_soc_open,
 685         .trigger        = sst_soc_trigger,
 686         .pointer        = sst_soc_pointer,
 687         .compress_ops   = &sst_platform_compress_ops,
 688         .pcm_construct  = sst_soc_pcm_new,
 689 };
 690
 691 static int sst_platform_probe(struct platform_device *pdev)
 692 {
 693         struct sst_data *drv;
 694         int ret;
 695         struct sst_platform_data *pdata;
 696
 697         drv = devm_kzalloc(&pdev->dev, sizeof(*drv), GFP_KERNEL);
 698         if (drv == NULL) {
 699                 return -ENOMEM;
 700         }
 701
 702         pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
 703         if (pdata == NULL) {
 704                 return -ENOMEM;
 705         }
 706
 707         pdata->pdev_strm_map = dpcm_strm_map;
 708         pdata->strm_map_size = ARRAY_SIZE(dpcm_strm_map);
 709         drv->pdata = pdata;
 710         drv->pdev = pdev;
 711         mutex_init(&drv->lock);
 712         dev_set_drvdata(&pdev->dev, drv);
 713
 714         ret = devm_snd_soc_register_component(&pdev->dev, &sst_soc_platform_drv,
 715                                 sst_platform_dai, ARRAY_SIZE(sst_platform_dai));
 716         if (ret)
 717                 dev_err(&pdev->dev, "registering cpu dais failed\n");
 718
 719         return ret;
 720 }
 721
 722 static int sst_platform_remove(struct platform_device *pdev)
 723 {
 724         dev_dbg(&pdev->dev, "sst_platform_remove success\n");
 725         return 0;
 726 }
 727
 728 #ifdef CONFIG_PM_SLEEP
 729
 730 static int sst_soc_prepare(struct device *dev)
 731 {
 732         struct sst_data *drv = dev_get_drvdata(dev);
 733         struct snd_soc_pcm_runtime *rtd;
 734
 735         if (!drv->soc_card)
 736                 return 0;
 737
 738         /* suspend all pcms first */
 739         snd_soc_suspend(drv->soc_card->dev);
 740         snd_soc_poweroff(drv->soc_card->dev);
 741
 742         /* set the SSPs to idle */
 743         for_each_card_rtds(drv->soc_card, rtd) {
 744                 struct snd_soc_dai *dai = asoc_rtd_to_cpu(rtd, 0);
 745
 746                 if (snd_soc_dai_active(dai)) {
 747                         send_ssp_cmd(dai, dai->name, 0);
 748                         sst_handle_vb_timer(dai, false);
 749                 }
 750         }
 751
 752         return 0;
 753 }
 754
 755 static void sst_soc_complete(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;
 762
 763         /* restart SSPs */
 764         for_each_card_rtds(drv->soc_card, rtd) {
 765                 struct snd_soc_dai *dai = asoc_rtd_to_cpu(rtd, 0);
 766
 767                 if (snd_soc_dai_active(dai)) {
 768                         sst_handle_vb_timer(dai, true);
 769                         send_ssp_cmd(dai, dai->name, 1);
 770                 }
 771         }
 772         snd_soc_resume(drv->soc_card->dev);
 773 }
 774
 775 #else
 776
 777 #define sst_soc_prepare NULL
 778 #define sst_soc_complete NULL
 779
 780 #endif
 781
 782
 783 static const struct dev_pm_ops sst_platform_pm = {
 784         .prepare        = sst_soc_prepare,
 785         .complete       = sst_soc_complete,
 786 };
 787
 788 static struct platform_driver sst_platform_driver = {
 789         .driver         = {
 790                 .name           = "sst-mfld-platform",
 791                 .pm             = &sst_platform_pm,
 792         },
 793         .probe          = sst_platform_probe,
 794         .remove         = sst_platform_remove,
 795 };
 796
 797 module_platform_driver(sst_platform_driver);
 798
 799 MODULE_DESCRIPTION("ASoC Intel(R) MID Platform driver");
 800 MODULE_AUTHOR("Vinod Koul <vinod.koul@intel.com>");
 801 MODULE_AUTHOR("Harsha Priya <priya.harsha@intel.com>");
 802 MODULE_LICENSE("GPL v2");
 803 MODULE_ALIAS("platform:sst-atom-hifi2-platform");
 804 MODULE_ALIAS("platform:sst-mfld-platform");