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                 pr_err("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         pr_debug("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         pr_debug("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(&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         int ret_val;
 310
 311         pr_debug("setting buffer ptr param\n");
 312         sst_set_stream_status(stream, SST_PLATFORM_INIT);
 313         stream->stream_info.period_elapsed = sst_period_elapsed;
 314         stream->stream_info.arg = substream;
 315         stream->stream_info.buffer_ptr = 0;
 316         stream->stream_info.sfreq = substream->runtime->rate;
 317         ret_val = stream->ops->device_control(
 318                         SST_SND_STREAM_INIT, &stream->stream_info);
 319         if (ret_val)
 320                 pr_err("control_set ret error %d\n", ret_val);
 321         return ret_val;
 322
 323 }
 324 /* end -- helper functions */
 325
 326 static int sst_media_open(struct snd_pcm_substream *substream,
 327                 struct snd_soc_dai *dai)
 328 {
 329         int ret_val = 0;
 330         struct snd_pcm_runtime *runtime = substream->runtime;
 331         struct sst_runtime_stream *stream;
 332
 333         stream = kzalloc(sizeof(*stream), GFP_KERNEL);
 334         if (!stream)
 335                 return -ENOMEM;
 336         spin_lock_init(&stream->status_lock);
 337
 338         /* get the sst ops */
 339         mutex_lock(&sst_lock);
 340         if (!sst ||
 341             !try_module_get(sst->dev->driver->owner)) {
 342                 pr_err("no device available to run\n");
 343                 ret_val = -ENODEV;
 344                 goto out_ops;
 345         }
 346         stream->ops = sst->ops;
 347         mutex_unlock(&sst_lock);
 348
 349         stream->stream_info.str_id = 0;
 350
 351         stream->stream_info.arg = substream;
 352         /* allocate memory for SST API set */
 353         runtime->private_data = stream;
 354
 355         /* Make sure, that the period size is always even */
 356         snd_pcm_hw_constraint_step(substream->runtime, 0,
 357                            SNDRV_PCM_HW_PARAM_PERIODS, 2);
 358
 359         return snd_pcm_hw_constraint_integer(runtime,
 360                          SNDRV_PCM_HW_PARAM_PERIODS);
 361 out_ops:
 362         kfree(stream);
 363         mutex_unlock(&sst_lock);
 364         return ret_val;
 365 }
 366
 367 static void sst_media_close(struct snd_pcm_substream *substream,
 368                 struct snd_soc_dai *dai)
 369 {
 370         struct sst_runtime_stream *stream;
 371         int ret_val = 0, str_id;
 372
 373         stream = substream->runtime->private_data;
 374         str_id = stream->stream_info.str_id;
 375         if (str_id)
 376                 ret_val = stream->ops->close(str_id);
 377         module_put(sst->dev->driver->owner);
 378         kfree(stream);
 379 }
 380
 381 static inline unsigned int get_current_pipe_id(struct snd_soc_platform *platform,
 382                                                struct snd_pcm_substream *substream)
 383 {
 384         struct sst_data *sst = snd_soc_platform_get_drvdata(platform);
 385         struct sst_dev_stream_map *map = sst->pdata->pdev_strm_map;
 386         struct sst_runtime_stream *stream =
 387                         substream->runtime->private_data;
 388         u32 str_id = stream->stream_info.str_id;
 389         unsigned int pipe_id;
 390         pipe_id = map[str_id].device_id;
 391
 392         pr_debug("%s: got pipe_id = %#x for str_id = %d\n",
 393                  __func__, 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->device_control(
 407                                 SST_SND_DROP, &str_id);
 408                 return ret_val;
 409         }
 410
 411         ret_val = sst_platform_alloc_stream(substream, dai->platform);
 412         if (ret_val <= 0)
 413                 return ret_val;
 414         snprintf(substream->pcm->id, sizeof(substream->pcm->id),
 415                         "%d", stream->stream_info.str_id);
 416
 417         ret_val = sst_platform_init_stream(substream);
 418         if (ret_val)
 419                 return ret_val;
 420         substream->runtime->hw.info = SNDRV_PCM_INFO_BLOCK_TRANSFER;
 421         return ret_val;
 422 }
 423
 424 static int sst_media_hw_params(struct snd_pcm_substream *substream,
 425                                 struct snd_pcm_hw_params *params,
 426                                 struct snd_soc_dai *dai)
 427 {
 428         snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(params));
 429         memset(substream->runtime->dma_area, 0, params_buffer_bytes(params));
 430         return 0;
 431 }
 432
 433 static int sst_media_hw_free(struct snd_pcm_substream *substream,
 434                 struct snd_soc_dai *dai)
 435 {
 436         return snd_pcm_lib_free_pages(substream);
 437 }
 438
 439 static struct snd_soc_dai_ops sst_media_dai_ops = {
 440         .startup = sst_media_open,
 441         .shutdown = sst_media_close,
 442         .prepare = sst_media_prepare,
 443         .hw_params = sst_media_hw_params,
 444         .hw_free = sst_media_hw_free,
 445 };
 446
 447 static int sst_platform_open(struct snd_pcm_substream *substream)
 448 {
 449         struct snd_pcm_runtime *runtime;
 450
 451         if (substream->pcm->internal)
 452                 return 0;
 453
 454         runtime = substream->runtime;
 455         runtime->hw = sst_platform_pcm_hw;
 456         return 0;
 457 }
 458
 459 static int sst_platform_pcm_trigger(struct snd_pcm_substream *substream,
 460                                         int cmd)
 461 {
 462         int ret_val = 0, str_id;
 463         struct sst_runtime_stream *stream;
 464         int str_cmd, status;
 465
 466         pr_debug("sst_platform_pcm_trigger called\n");
 467         stream = substream->runtime->private_data;
 468         str_id = stream->stream_info.str_id;
 469         switch (cmd) {
 470         case SNDRV_PCM_TRIGGER_START:
 471                 pr_debug("sst: Trigger Start\n");
 472                 str_cmd = SST_SND_START;
 473                 status = SST_PLATFORM_RUNNING;
 474                 stream->stream_info.arg = substream;
 475                 break;
 476         case SNDRV_PCM_TRIGGER_STOP:
 477                 pr_debug("sst: in stop\n");
 478                 str_cmd = SST_SND_DROP;
 479                 status = SST_PLATFORM_DROPPED;
 480                 break;
 481         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
 482                 pr_debug("sst: in pause\n");
 483                 str_cmd = SST_SND_PAUSE;
 484                 status = SST_PLATFORM_PAUSED;
 485                 break;
 486         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
 487                 pr_debug("sst: in pause release\n");
 488                 str_cmd = SST_SND_RESUME;
 489                 status = SST_PLATFORM_RUNNING;
 490                 break;
 491         default:
 492                 return -EINVAL;
 493         }
 494         ret_val = stream->ops->device_control(str_cmd, &str_id);
 495         if (!ret_val)
 496                 sst_set_stream_status(stream, status);
 497
 498         return ret_val;
 499 }
 500
 501
 502 static snd_pcm_uframes_t sst_platform_pcm_pointer
 503                         (struct snd_pcm_substream *substream)
 504 {
 505         struct sst_runtime_stream *stream;
 506         int ret_val, status;
 507         struct pcm_stream_info *str_info;
 508
 509         stream = substream->runtime->private_data;
 510         status = sst_get_stream_status(stream);
 511         if (status == SST_PLATFORM_INIT)
 512                 return 0;
 513         str_info = &stream->stream_info;
 514         ret_val = stream->ops->device_control(
 515                                 SST_SND_BUFFER_POINTER, str_info);
 516         if (ret_val) {
 517                 pr_err("sst: error code = %d\n", ret_val);
 518                 return ret_val;
 519         }
 520         substream->runtime->delay = str_info->pcm_delay;
 521         return str_info->buffer_ptr;
 522 }
 523
 524 static struct snd_pcm_ops sst_platform_ops = {
 525         .open = sst_platform_open,
 526         .ioctl = snd_pcm_lib_ioctl,
 527         .trigger = sst_platform_pcm_trigger,
 528         .pointer = sst_platform_pcm_pointer,
 529 };
 530
 531 static void sst_pcm_free(struct snd_pcm *pcm)
 532 {
 533         pr_debug("sst_pcm_free called\n");
 534         snd_pcm_lib_preallocate_free_for_all(pcm);
 535 }
 536
 537 static int sst_pcm_new(struct snd_soc_pcm_runtime *rtd)
 538 {
 539         struct snd_soc_dai *dai = rtd->cpu_dai;
 540         struct snd_pcm *pcm = rtd->pcm;
 541         int retval = 0;
 542
 543         if (dai->driver->playback.channels_min ||
 544                         dai->driver->capture.channels_min) {
 545                 retval =  snd_pcm_lib_preallocate_pages_for_all(pcm,
 546                         SNDRV_DMA_TYPE_CONTINUOUS,
 547                         snd_dma_continuous_data(GFP_DMA),
 548                         SST_MIN_BUFFER, SST_MAX_BUFFER);
 549                 if (retval) {
 550                         pr_err("dma buffer allocationf fail\n");
 551                         return retval;
 552                 }
 553         }
 554         return retval;
 555 }
 556
 557 static struct snd_soc_platform_driver sst_soc_platform_drv = {
 558         .ops            = &sst_platform_ops,
 559         .compr_ops      = &sst_platform_compr_ops,
 560         .pcm_new        = sst_pcm_new,
 561         .pcm_free       = sst_pcm_free,
 562 };
 563
 564 static const struct snd_soc_component_driver sst_component = {
 565         .name           = "sst",
 566 };
 567
 568
 569 static int sst_platform_probe(struct platform_device *pdev)
 570 {
 571         struct sst_data *drv;
 572         int ret;
 573         struct sst_platform_data *pdata;
 574
 575         drv = devm_kzalloc(&pdev->dev, sizeof(*drv), GFP_KERNEL);
 576         if (drv == NULL) {
 577                 pr_err("kzalloc failed\n");
 578                 return -ENOMEM;
 579         }
 580
 581         pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
 582         if (pdata == NULL) {
 583                 pr_err("kzalloc failed for pdata\n");
 584                 return -ENOMEM;
 585         }
 586
 587         pdata->pdev_strm_map = dpcm_strm_map;
 588         pdata->strm_map_size = ARRAY_SIZE(dpcm_strm_map);
 589         drv->pdata = pdata;
 590         mutex_init(&drv->lock);
 591         dev_set_drvdata(&pdev->dev, drv);
 592
 593         ret = snd_soc_register_platform(&pdev->dev, &sst_soc_platform_drv);
 594         if (ret) {
 595                 pr_err("registering soc platform failed\n");
 596                 return ret;
 597         }
 598
 599         ret = snd_soc_register_component(&pdev->dev, &sst_component,
 600                                 sst_platform_dai, ARRAY_SIZE(sst_platform_dai));
 601         if (ret) {
 602                 pr_err("registering cpu dais failed\n");
 603                 snd_soc_unregister_platform(&pdev->dev);
 604         }
 605         return ret;
 606 }
 607
 608 static int sst_platform_remove(struct platform_device *pdev)
 609 {
 610
 611         snd_soc_unregister_component(&pdev->dev);
 612         snd_soc_unregister_platform(&pdev->dev);
 613         pr_debug("sst_platform_remove success\n");
 614         return 0;
 615 }
 616
 617 static struct platform_driver sst_platform_driver = {
 618         .driver         = {
 619                 .name           = "sst-mfld-platform",
 620                 .owner          = THIS_MODULE,
 621         },
 622         .probe          = sst_platform_probe,
 623         .remove         = sst_platform_remove,
 624 };
 625
 626 module_platform_driver(sst_platform_driver);
 627
 628 MODULE_DESCRIPTION("ASoC Intel(R) MID Platform driver");
 629 MODULE_AUTHOR("Vinod Koul <vinod.koul@intel.com>");
 630 MODULE_AUTHOR("Harsha Priya <priya.harsha@intel.com>");
 631 MODULE_LICENSE("GPL v2");
 632 MODULE_ALIAS("platform:sst-mfld-platform");