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

   1 /*
   2  *  sst_mfld_platform.c - Intel MID Platform driver
   3  *
   4  *  Copyright (C) 2010-2014 Intel Corp
   5  *  Author: Vinod Koul <vinod.koul@intel.com>
   6  *  Author: Harsha Priya <priya.harsha@intel.com>
   7  *  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   8  *
   9  *  This program is free software; you can redistribute it and/or modify
  10  *  it under the terms of the GNU General Public License as published by
  11  *  the Free Software Foundation; version 2 of the License.
  12  *
  13  *  This program is distributed in the hope that it will be useful, but
  14  *  WITHOUT ANY WARRANTY; without even the implied warranty of
  15  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  *  General Public License for more details.
  17  *
  18  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  19  */
  20 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  21
  22 #include <linux/slab.h>
  23 #include <linux/io.h>
  24 #include <linux/module.h>
  25 #include <sound/core.h>
  26 #include <sound/pcm.h>
  27 #include <sound/pcm_params.h>
  28 #include <sound/soc.h>
  29 #include <sound/compress_driver.h>
  30 #include <asm/platform_sst_audio.h>
  31 #include "sst-mfld-platform.h"
  32 #include "sst-atom-controls.h"
  33
  34 struct sst_device *sst;
  35 static DEFINE_MUTEX(sst_lock);
  36 extern struct snd_compr_ops sst_platform_compr_ops;
  37
  38 int sst_register_dsp(struct sst_device *dev)
  39 {
  40         if (WARN_ON(!dev))
  41                 return -EINVAL;
  42         if (!try_module_get(dev->dev->driver->owner))
  43                 return -ENODEV;
  44         mutex_lock(&sst_lock);
  45         if (sst) {
  46                 dev_err(dev->dev, "we already have a device %s\n", sst->name);
  47                 module_put(dev->dev->driver->owner);
  48                 mutex_unlock(&sst_lock);
  49                 return -EEXIST;
  50         }
  51         dev_dbg(dev->dev, "registering device %s\n", dev->name);
  52         sst = dev;
  53         mutex_unlock(&sst_lock);
  54         return 0;
  55 }
  56 EXPORT_SYMBOL_GPL(sst_register_dsp);
  57
  58 int sst_unregister_dsp(struct sst_device *dev)
  59 {
  60         if (WARN_ON(!dev))
  61                 return -EINVAL;
  62         if (dev != sst)
  63                 return -EINVAL;
  64
  65         mutex_lock(&sst_lock);
  66
  67         if (!sst) {
  68                 mutex_unlock(&sst_lock);
  69                 return -EIO;
  70         }
  71
  72         module_put(sst->dev->driver->owner);
  73         dev_dbg(dev->dev, "unreg %s\n", sst->name);
  74         sst = NULL;
  75         mutex_unlock(&sst_lock);
  76         return 0;
  77 }
  78 EXPORT_SYMBOL_GPL(sst_unregister_dsp);
  79
  80 static struct snd_pcm_hardware sst_platform_pcm_hw = {
  81         .info = (SNDRV_PCM_INFO_INTERLEAVED |
  82                         SNDRV_PCM_INFO_DOUBLE |
  83                         SNDRV_PCM_INFO_PAUSE |
  84                         SNDRV_PCM_INFO_RESUME |
  85                         SNDRV_PCM_INFO_MMAP|
  86                         SNDRV_PCM_INFO_MMAP_VALID |
  87                         SNDRV_PCM_INFO_BLOCK_TRANSFER |
  88                         SNDRV_PCM_INFO_SYNC_START),
  89         .buffer_bytes_max = SST_MAX_BUFFER,
  90         .period_bytes_min = SST_MIN_PERIOD_BYTES,
  91         .period_bytes_max = SST_MAX_PERIOD_BYTES,
  92         .periods_min = SST_MIN_PERIODS,
  93         .periods_max = SST_MAX_PERIODS,
  94         .fifo_size = SST_FIFO_SIZE,
  95 };
  96
  97 static struct sst_dev_stream_map dpcm_strm_map[] = {
  98         {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF}, /* Reserved, not in use */
  99         {MERR_DPCM_AUDIO, 0, SNDRV_PCM_STREAM_PLAYBACK, PIPE_MEDIA1_IN, SST_TASK_ID_MEDIA, 0},
 100         {MERR_DPCM_COMPR, 0, SNDRV_PCM_STREAM_PLAYBACK, PIPE_MEDIA0_IN, SST_TASK_ID_MEDIA, 0},
 101         {MERR_DPCM_AUDIO, 0, SNDRV_PCM_STREAM_CAPTURE, PIPE_PCM1_OUT, SST_TASK_ID_MEDIA, 0},
 102 };
 103
 104 /* MFLD - MSIC */
 105 static struct snd_soc_dai_driver sst_platform_dai[] = {
 106 {
 107         .name = "Headset-cpu-dai",
 108         .id = 0,
 109         .playback = {
 110                 .channels_min = SST_STEREO,
 111                 .channels_max = SST_STEREO,
 112                 .rates = SNDRV_PCM_RATE_48000,
 113                 .formats = SNDRV_PCM_FMTBIT_S24_LE,
 114         },
 115         .capture = {
 116                 .channels_min = 1,
 117                 .channels_max = 5,
 118                 .rates = SNDRV_PCM_RATE_48000,
 119                 .formats = SNDRV_PCM_FMTBIT_S24_LE,
 120         },
 121 },
 122 {
 123         .name = "Compress-cpu-dai",
 124         .compress_dai = 1,
 125         .playback = {
 126                 .channels_min = SST_STEREO,
 127                 .channels_max = SST_STEREO,
 128                 .rates = SNDRV_PCM_RATE_44100|SNDRV_PCM_RATE_48000,
 129                 .formats = SNDRV_PCM_FMTBIT_S16_LE,
 130         },
 131 },
 132 };
 133
 134 /* helper functions */
 135 void sst_set_stream_status(struct sst_runtime_stream *stream,
 136                                         int state)
 137 {
 138         unsigned long flags;
 139         spin_lock_irqsave(&stream->status_lock, flags);
 140         stream->stream_status = state;
 141         spin_unlock_irqrestore(&stream->status_lock, flags);
 142 }
 143
 144 static inline int sst_get_stream_status(struct sst_runtime_stream *stream)
 145 {
 146         int state;
 147         unsigned long flags;
 148
 149         spin_lock_irqsave(&stream->status_lock, flags);
 150         state = stream->stream_status;
 151         spin_unlock_irqrestore(&stream->status_lock, flags);
 152         return state;
 153 }
 154
 155 static void sst_fill_alloc_params(struct snd_pcm_substream *substream,
 156                                 struct snd_sst_alloc_params_ext *alloc_param)
 157 {
 158         unsigned int channels;
 159         snd_pcm_uframes_t period_size;
 160         ssize_t periodbytes;
 161         ssize_t buffer_bytes = snd_pcm_lib_buffer_bytes(substream);
 162         u32 buffer_addr = virt_to_phys(substream->dma_buffer.area);
 163
 164         channels = substream->runtime->channels;
 165         period_size = substream->runtime->period_size;
 166         periodbytes = samples_to_bytes(substream->runtime, period_size);
 167         alloc_param->ring_buf_info[0].addr = buffer_addr;
 168         alloc_param->ring_buf_info[0].size = buffer_bytes;
 169         alloc_param->sg_count = 1;
 170         alloc_param->reserved = 0;
 171         alloc_param->frag_size = periodbytes * channels;
 172
 173 }
 174 static void sst_fill_pcm_params(struct snd_pcm_substream *substream,
 175                                 struct snd_sst_stream_params *param)
 176 {
 177         param->uc.pcm_params.num_chan = (u8) substream->runtime->channels;
 178         param->uc.pcm_params.pcm_wd_sz = substream->runtime->sample_bits;
 179         param->uc.pcm_params.sfreq = substream->runtime->rate;
 180
 181         /* PCM stream via ALSA interface */
 182         param->uc.pcm_params.use_offload_path = 0;
 183         param->uc.pcm_params.reserved2 = 0;
 184         memset(param->uc.pcm_params.channel_map, 0, sizeof(u8));
 185
 186 }
 187
 188 static int sst_get_stream_mapping(int dev, int sdev, int dir,
 189         struct sst_dev_stream_map *map, int size)
 190 {
 191         int i;
 192
 193         if (map == NULL)
 194                 return -EINVAL;
 195
 196
 197         /* index 0 is not used in stream map */
 198         for (i = 1; i < size; i++) {
 199                 if ((map[i].dev_num == dev) && (map[i].direction == dir))
 200                         return i;
 201         }
 202         return 0;
 203 }
 204
 205 int sst_fill_stream_params(void *substream,
 206         const struct sst_data *ctx, struct snd_sst_params *str_params, bool is_compress)
 207 {
 208         int map_size;
 209         int index;
 210         struct sst_dev_stream_map *map;
 211         struct snd_pcm_substream *pstream = NULL;
 212         struct snd_compr_stream *cstream = NULL;
 213
 214         map = ctx->pdata->pdev_strm_map;
 215         map_size = ctx->pdata->strm_map_size;
 216
 217         if (is_compress == true)
 218                 cstream = (struct snd_compr_stream *)substream;
 219         else
 220                 pstream = (struct snd_pcm_substream *)substream;
 221
 222         str_params->stream_type = SST_STREAM_TYPE_MUSIC;
 223
 224         /* For pcm streams */
 225         if (pstream) {
 226                 index = sst_get_stream_mapping(pstream->pcm->device,
 227                                           pstream->number, pstream->stream,
 228                                           map, map_size);
 229                 if (index <= 0)
 230                         return -EINVAL;
 231
 232                 str_params->stream_id = index;
 233                 str_params->device_type = map[index].device_id;
 234                 str_params->task = map[index].task_id;
 235
 236                 str_params->ops = (u8)pstream->stream;
 237         }
 238
 239         if (cstream) {
 240                 index = sst_get_stream_mapping(cstream->device->device,
 241                                                0, cstream->direction,
 242                                                map, map_size);
 243                 if (index <= 0)
 244                         return -EINVAL;
 245                 str_params->stream_id = index;
 246                 str_params->device_type = map[index].device_id;
 247                 str_params->task = map[index].task_id;
 248
 249                 str_params->ops = (u8)cstream->direction;
 250         }
 251         return 0;
 252 }
 253
 254 static int sst_platform_alloc_stream(struct snd_pcm_substream *substream,
 255                 struct snd_soc_platform *platform)
 256 {
 257         struct sst_runtime_stream *stream =
 258                         substream->runtime->private_data;
 259         struct snd_sst_stream_params param = {{{0,},},};
 260         struct snd_sst_params str_params = {0};
 261         struct snd_sst_alloc_params_ext alloc_params = {0};
 262         int ret_val = 0;
 263         struct sst_data *ctx = snd_soc_platform_get_drvdata(platform);
 264
 265         /* set codec params and inform SST driver the same */
 266         sst_fill_pcm_params(substream, &param);
 267         sst_fill_alloc_params(substream, &alloc_params);
 268         substream->runtime->dma_area = substream->dma_buffer.area;
 269         str_params.sparams = param;
 270         str_params.aparams = alloc_params;
 271         str_params.codec = SST_CODEC_TYPE_PCM;
 272
 273         /* fill the device type and stream id to pass to SST driver */
 274         ret_val = sst_fill_stream_params(substream, ctx, &str_params, false);
 275         if (ret_val < 0)
 276                 return ret_val;
 277
 278         stream->stream_info.str_id = str_params.stream_id;
 279
 280         ret_val = stream->ops->open(sst->dev, &str_params);
 281         if (ret_val <= 0)
 282                 return ret_val;
 283
 284
 285         return ret_val;
 286 }
 287
 288 static void sst_period_elapsed(void *arg)
 289 {
 290         struct snd_pcm_substream *substream = arg;
 291         struct sst_runtime_stream *stream;
 292         int status;
 293
 294         if (!substream || !substream->runtime)
 295                 return;
 296         stream = substream->runtime->private_data;
 297         if (!stream)
 298                 return;
 299         status = sst_get_stream_status(stream);
 300         if (status != SST_PLATFORM_RUNNING)
 301                 return;
 302         snd_pcm_period_elapsed(substream);
 303 }
 304
 305 static int sst_platform_init_stream(struct snd_pcm_substream *substream)
 306 {
 307         struct sst_runtime_stream *stream =
 308                         substream->runtime->private_data;
 309         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 310         int ret_val;
 311
 312         dev_dbg(rtd->dev, "setting buffer ptr param\n");
 313         sst_set_stream_status(stream, SST_PLATFORM_INIT);
 314         stream->stream_info.period_elapsed = sst_period_elapsed;
 315         stream->stream_info.arg = substream;
 316         stream->stream_info.buffer_ptr = 0;
 317         stream->stream_info.sfreq = substream->runtime->rate;
 318         ret_val = stream->ops->stream_init(sst->dev, &stream->stream_info);
 319         if (ret_val)
 320                 dev_err(rtd->dev, "control_set ret error %d\n", ret_val);
 321         return ret_val;
 322
 323 }
 324
 325 static int sst_media_open(struct snd_pcm_substream *substream,
 326                 struct snd_soc_dai *dai)
 327 {
 328         int ret_val = 0;
 329         struct snd_pcm_runtime *runtime = substream->runtime;
 330         struct sst_runtime_stream *stream;
 331
 332         stream = kzalloc(sizeof(*stream), GFP_KERNEL);
 333         if (!stream)
 334                 return -ENOMEM;
 335         spin_lock_init(&stream->status_lock);
 336
 337         /* get the sst ops */
 338         mutex_lock(&sst_lock);
 339         if (!sst ||
 340             !try_module_get(sst->dev->driver->owner)) {
 341                 dev_err(dai->dev, "no device available to run\n");
 342                 ret_val = -ENODEV;
 343                 goto out_ops;
 344         }
 345         stream->ops = sst->ops;
 346         mutex_unlock(&sst_lock);
 347
 348         stream->stream_info.str_id = 0;
 349
 350         stream->stream_info.arg = substream;
 351         /* allocate memory for SST API set */
 352         runtime->private_data = stream;
 353
 354         /* Make sure, that the period size is always even */
 355         snd_pcm_hw_constraint_step(substream->runtime, 0,
 356                            SNDRV_PCM_HW_PARAM_PERIODS, 2);
 357
 358         return snd_pcm_hw_constraint_integer(runtime,
 359                          SNDRV_PCM_HW_PARAM_PERIODS);
 360 out_ops:
 361         kfree(stream);
 362         mutex_unlock(&sst_lock);
 363         return ret_val;
 364 }
 365
 366 static void sst_media_close(struct snd_pcm_substream *substream,
 367                 struct snd_soc_dai *dai)
 368 {
 369         struct sst_runtime_stream *stream;
 370         int ret_val = 0, str_id;
 371
 372         stream = substream->runtime->private_data;
 373         str_id = stream->stream_info.str_id;
 374         if (str_id)
 375                 ret_val = stream->ops->close(sst->dev, str_id);
 376         module_put(sst->dev->driver->owner);
 377         kfree(stream);
 378 }
 379
 380 static inline unsigned int get_current_pipe_id(struct snd_soc_platform *platform,
 381                                                struct snd_pcm_substream *substream)
 382 {
 383         struct sst_data *sst = snd_soc_platform_get_drvdata(platform);
 384         struct sst_dev_stream_map *map = sst->pdata->pdev_strm_map;
 385         struct sst_runtime_stream *stream =
 386                         substream->runtime->private_data;
 387         u32 str_id = stream->stream_info.str_id;
 388         unsigned int pipe_id;
 389
 390         pipe_id = map[str_id].device_id;
 391
 392         dev_dbg(platform->dev, "got pipe_id = %#x for str_id = %d\n",
 393                         pipe_id, str_id);
 394         return pipe_id;
 395 }
 396
 397 static int sst_media_prepare(struct snd_pcm_substream *substream,
 398                 struct snd_soc_dai *dai)
 399 {
 400         struct sst_runtime_stream *stream;
 401         int ret_val = 0, str_id;
 402
 403         stream = substream->runtime->private_data;
 404         str_id = stream->stream_info.str_id;
 405         if (stream->stream_info.str_id) {
 406                 ret_val = stream->ops->stream_drop(sst->dev, str_id);
 407                 return ret_val;
 408         }
 409
 410         ret_val = sst_platform_alloc_stream(substream, dai->platform);
 411         if (ret_val <= 0)
 412                 return ret_val;
 413         snprintf(substream->pcm->id, sizeof(substream->pcm->id),
 414                         "%d", stream->stream_info.str_id);
 415
 416         ret_val = sst_platform_init_stream(substream);
 417         if (ret_val)
 418                 return ret_val;
 419         substream->runtime->hw.info = SNDRV_PCM_INFO_BLOCK_TRANSFER;
 420         return ret_val;
 421 }
 422
 423 static int sst_media_hw_params(struct snd_pcm_substream *substream,
 424                                 struct snd_pcm_hw_params *params,
 425                                 struct snd_soc_dai *dai)
 426 {
 427         snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(params));
 428         memset(substream->runtime->dma_area, 0, params_buffer_bytes(params));
 429         return 0;
 430 }
 431
 432 static int sst_media_hw_free(struct snd_pcm_substream *substream,
 433                 struct snd_soc_dai *dai)
 434 {
 435         return snd_pcm_lib_free_pages(substream);
 436 }
 437
 438 static struct snd_soc_dai_ops sst_media_dai_ops = {
 439         .startup = sst_media_open,
 440         .shutdown = sst_media_close,
 441         .prepare = sst_media_prepare,
 442         .hw_params = sst_media_hw_params,
 443         .hw_free = sst_media_hw_free,
 444 };
 445
 446 static int sst_platform_open(struct snd_pcm_substream *substream)
 447 {
 448         struct snd_pcm_runtime *runtime;
 449
 450         if (substream->pcm->internal)
 451                 return 0;
 452
 453         runtime = substream->runtime;
 454         runtime->hw = sst_platform_pcm_hw;
 455         return 0;
 456 }
 457
 458 static int sst_platform_pcm_trigger(struct snd_pcm_substream *substream,
 459                                         int cmd)
 460 {
 461         int ret_val = 0, str_id;
 462         struct sst_runtime_stream *stream;
 463         int status;
 464         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 465
 466         dev_dbg(rtd->dev, "sst_platform_pcm_trigger called\n");
 467         if (substream->pcm->internal)
 468                 return 0;
 469         stream = substream->runtime->private_data;
 470         str_id = stream->stream_info.str_id;
 471         switch (cmd) {
 472         case SNDRV_PCM_TRIGGER_START:
 473                 dev_dbg(rtd->dev, "sst: Trigger Start\n");
 474                 status = SST_PLATFORM_RUNNING;
 475                 stream->stream_info.arg = substream;
 476                 ret_val = stream->ops->stream_start(sst->dev, str_id);
 477                 break;
 478         case SNDRV_PCM_TRIGGER_STOP:
 479                 dev_dbg(rtd->dev, "sst: in stop\n");
 480                 status = SST_PLATFORM_DROPPED;
 481                 ret_val = stream->ops->stream_drop(sst->dev, str_id);
 482                 break;
 483         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
 484                 dev_dbg(rtd->dev, "sst: in pause\n");
 485                 status = SST_PLATFORM_PAUSED;
 486                 ret_val = stream->ops->stream_pause(sst->dev, str_id);
 487                 break;
 488         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
 489                 dev_dbg(rtd->dev, "sst: in pause release\n");
 490                 status = SST_PLATFORM_RUNNING;
 491                 ret_val = stream->ops->stream_pause_release(sst->dev, str_id);
 492                 break;
 493         default:
 494                 return -EINVAL;
 495         }
 496
 497         if (!ret_val)
 498                 sst_set_stream_status(stream, status);
 499
 500         return ret_val;
 501 }
 502
 503
 504 static snd_pcm_uframes_t sst_platform_pcm_pointer
 505                         (struct snd_pcm_substream *substream)
 506 {
 507         struct sst_runtime_stream *stream;
 508         int ret_val, status;
 509         struct pcm_stream_info *str_info;
 510         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 511
 512         stream = substream->runtime->private_data;
 513         status = sst_get_stream_status(stream);
 514         if (status == SST_PLATFORM_INIT)
 515                 return 0;
 516         str_info = &stream->stream_info;
 517         ret_val = stream->ops->stream_read_tstamp(sst->dev, str_info);
 518         if (ret_val) {
 519                 dev_err(rtd->dev, "sst: error code = %d\n", ret_val);
 520                 return ret_val;
 521         }
 522         substream->runtime->delay = str_info->pcm_delay;
 523         return str_info->buffer_ptr;
 524 }
 525
 526 static struct snd_pcm_ops sst_platform_ops = {
 527         .open = sst_platform_open,
 528         .ioctl = snd_pcm_lib_ioctl,
 529         .trigger = sst_platform_pcm_trigger,
 530         .pointer = sst_platform_pcm_pointer,
 531 };
 532
 533 static void sst_pcm_free(struct snd_pcm *pcm)
 534 {
 535         dev_dbg(pcm->dev, "sst_pcm_free called\n");
 536         snd_pcm_lib_preallocate_free_for_all(pcm);
 537 }
 538
 539 static int sst_pcm_new(struct snd_soc_pcm_runtime *rtd)
 540 {
 541         struct snd_soc_dai *dai = rtd->cpu_dai;
 542         struct snd_pcm *pcm = rtd->pcm;
 543         int retval = 0;
 544
 545         if (dai->driver->playback.channels_min ||
 546                         dai->driver->capture.channels_min) {
 547                 retval =  snd_pcm_lib_preallocate_pages_for_all(pcm,
 548                         SNDRV_DMA_TYPE_CONTINUOUS,
 549                         snd_dma_continuous_data(GFP_DMA),
 550                         SST_MIN_BUFFER, SST_MAX_BUFFER);
 551                 if (retval) {
 552                         dev_err(rtd->dev, "dma buffer allocationf fail\n");
 553                         return retval;
 554                 }
 555         }
 556         return retval;
 557 }
 558
 559 static int sst_soc_probe(struct snd_soc_platform *platform)
 560 {
 561         return sst_dsp_init_v2_dpcm(platform);
 562 }
 563
 564 static struct snd_soc_platform_driver sst_soc_platform_drv  = {
 565         .probe          = sst_soc_probe,
 566         .ops            = &sst_platform_ops,
 567         .compr_ops      = &sst_platform_compr_ops,
 568         .pcm_new        = sst_pcm_new,
 569         .pcm_free       = sst_pcm_free,
 570 };
 571
 572 static const struct snd_soc_component_driver sst_component = {
 573         .name           = "sst",
 574 };
 575
 576
 577 static int sst_platform_probe(struct platform_device *pdev)
 578 {
 579         struct sst_data *drv;
 580         int ret;
 581         struct sst_platform_data *pdata;
 582
 583         drv = devm_kzalloc(&pdev->dev, sizeof(*drv), GFP_KERNEL);
 584         if (drv == NULL) {
 585                 return -ENOMEM;
 586         }
 587
 588         pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
 589         if (pdata == NULL) {
 590                 return -ENOMEM;
 591         }
 592
 593         pdata->pdev_strm_map = dpcm_strm_map;
 594         pdata->strm_map_size = ARRAY_SIZE(dpcm_strm_map);
 595         drv->pdata = pdata;
 596         mutex_init(&drv->lock);
 597         dev_set_drvdata(&pdev->dev, drv);
 598
 599         ret = snd_soc_register_platform(&pdev->dev, &sst_soc_platform_drv);
 600         if (ret) {
 601                 dev_err(&pdev->dev, "registering soc platform failed\n");
 602                 return ret;
 603         }
 604
 605         ret = snd_soc_register_component(&pdev->dev, &sst_component,
 606                                 sst_platform_dai, ARRAY_SIZE(sst_platform_dai));
 607         if (ret) {
 608                 dev_err(&pdev->dev, "registering cpu dais failed\n");
 609                 snd_soc_unregister_platform(&pdev->dev);
 610         }
 611         return ret;
 612 }
 613
 614 static int sst_platform_remove(struct platform_device *pdev)
 615 {
 616
 617         snd_soc_unregister_component(&pdev->dev);
 618         snd_soc_unregister_platform(&pdev->dev);
 619         dev_dbg(&pdev->dev, "sst_platform_remove success\n");
 620         return 0;
 621 }
 622
 623 static struct platform_driver sst_platform_driver = {
 624         .driver         = {
 625                 .name           = "sst-mfld-platform",
 626                 .owner          = THIS_MODULE,
 627         },
 628         .probe          = sst_platform_probe,
 629         .remove         = sst_platform_remove,
 630 };
 631
 632 module_platform_driver(sst_platform_driver);
 633
 634 MODULE_DESCRIPTION("ASoC Intel(R) MID Platform driver");
 635 MODULE_AUTHOR("Vinod Koul <vinod.koul@intel.com>");
 636 MODULE_AUTHOR("Harsha Priya <priya.harsha@intel.com>");
 637 MODULE_LICENSE("GPL v2");
 638 MODULE_ALIAS("platform:sst-mfld-platform");