sound/soc/mid-x86/sst_platform.c

   1 /*
   2  *  sst_platform.c - Intel MID Platform driver
   3  *
   4  *  Copyright (C) 2010-2013 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  *  You should have received a copy of the GNU General Public License along
  19  *  with this program; if not, write to the Free Software Foundation, Inc.,
  20  *  59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
  21  *
  22  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  23  *
  24  *
  25  */
  26 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  27
  28 #include <linux/slab.h>
  29 #include <linux/io.h>
  30 #include <linux/module.h>
  31 #include <sound/core.h>
  32 #include <sound/pcm.h>
  33 #include <sound/pcm_params.h>
  34 #include <sound/soc.h>
  35 #include <sound/compress_driver.h>
  36 #include "sst_platform.h"
  37
  38 static struct sst_device *sst;
  39 static DEFINE_MUTEX(sst_lock);
  40
  41 int sst_register_dsp(struct sst_device *dev)
  42 {
  43         BUG_ON(!dev);
  44         if (!try_module_get(dev->dev->driver->owner))
  45                 return -ENODEV;
  46         mutex_lock(&sst_lock);
  47         if (sst) {
  48                 pr_err("we already have a device %s\n", sst->name);
  49                 module_put(dev->dev->driver->owner);
  50                 mutex_unlock(&sst_lock);
  51                 return -EEXIST;
  52         }
  53         pr_debug("registering device %s\n", dev->name);
  54         sst = dev;
  55         mutex_unlock(&sst_lock);
  56         return 0;
  57 }
  58 EXPORT_SYMBOL_GPL(sst_register_dsp);
  59
  60 int sst_unregister_dsp(struct sst_device *dev)
  61 {
  62         BUG_ON(!dev);
  63         if (dev != sst)
  64                 return -EINVAL;
  65
  66         mutex_lock(&sst_lock);
  67
  68         if (!sst) {
  69                 mutex_unlock(&sst_lock);
  70                 return -EIO;
  71         }
  72
  73         module_put(sst->dev->driver->owner);
  74         pr_debug("unreg %s\n", sst->name);
  75         sst = NULL;
  76         mutex_unlock(&sst_lock);
  77         return 0;
  78 }
  79 EXPORT_SYMBOL_GPL(sst_unregister_dsp);
  80
  81 static struct snd_pcm_hardware sst_platform_pcm_hw = {
  82         .info = (SNDRV_PCM_INFO_INTERLEAVED |
  83                         SNDRV_PCM_INFO_DOUBLE |
  84                         SNDRV_PCM_INFO_PAUSE |
  85                         SNDRV_PCM_INFO_RESUME |
  86                         SNDRV_PCM_INFO_MMAP|
  87                         SNDRV_PCM_INFO_MMAP_VALID |
  88                         SNDRV_PCM_INFO_BLOCK_TRANSFER |
  89                         SNDRV_PCM_INFO_SYNC_START),
  90         .formats = (SNDRV_PCM_FMTBIT_S16 | SNDRV_PCM_FMTBIT_U16 |
  91                         SNDRV_PCM_FMTBIT_S24 | SNDRV_PCM_FMTBIT_U24 |
  92                         SNDRV_PCM_FMTBIT_S32 | SNDRV_PCM_FMTBIT_U32),
  93         .rates = (SNDRV_PCM_RATE_8000|
  94                         SNDRV_PCM_RATE_44100 |
  95                         SNDRV_PCM_RATE_48000),
  96         .rate_min = SST_MIN_RATE,
  97         .rate_max = SST_MAX_RATE,
  98         .channels_min = SST_MIN_CHANNEL,
  99         .channels_max = SST_MAX_CHANNEL,
 100         .buffer_bytes_max = SST_MAX_BUFFER,
 101         .period_bytes_min = SST_MIN_PERIOD_BYTES,
 102         .period_bytes_max = SST_MAX_PERIOD_BYTES,
 103         .periods_min = SST_MIN_PERIODS,
 104         .periods_max = SST_MAX_PERIODS,
 105         .fifo_size = SST_FIFO_SIZE,
 106 };
 107
 108 /* MFLD - MSIC */
 109 static struct snd_soc_dai_driver sst_platform_dai[] = {
 110 {
 111         .name = "Headset-cpu-dai",
 112         .id = 0,
 113         .playback = {
 114                 .channels_min = SST_STEREO,
 115                 .channels_max = SST_STEREO,
 116                 .rates = SNDRV_PCM_RATE_48000,
 117                 .formats = SNDRV_PCM_FMTBIT_S24_LE,
 118         },
 119         .capture = {
 120                 .channels_min = 1,
 121                 .channels_max = 5,
 122                 .rates = SNDRV_PCM_RATE_48000,
 123                 .formats = SNDRV_PCM_FMTBIT_S24_LE,
 124         },
 125 },
 126 {
 127         .name = "Speaker-cpu-dai",
 128         .id = 1,
 129         .playback = {
 130                 .channels_min = SST_MONO,
 131                 .channels_max = SST_STEREO,
 132                 .rates = SNDRV_PCM_RATE_48000,
 133                 .formats = SNDRV_PCM_FMTBIT_S24_LE,
 134         },
 135 },
 136 {
 137         .name = "Vibra1-cpu-dai",
 138         .id = 2,
 139         .playback = {
 140                 .channels_min = SST_MONO,
 141                 .channels_max = SST_MONO,
 142                 .rates = SNDRV_PCM_RATE_48000,
 143                 .formats = SNDRV_PCM_FMTBIT_S24_LE,
 144         },
 145 },
 146 {
 147         .name = "Vibra2-cpu-dai",
 148         .id = 3,
 149         .playback = {
 150                 .channels_min = SST_MONO,
 151                 .channels_max = SST_STEREO,
 152                 .rates = SNDRV_PCM_RATE_48000,
 153                 .formats = SNDRV_PCM_FMTBIT_S24_LE,
 154         },
 155 },
 156 {
 157         .name = "Compress-cpu-dai",
 158         .compress_dai = 1,
 159         .playback = {
 160                 .channels_min = SST_STEREO,
 161                 .channels_max = SST_STEREO,
 162                 .rates = SNDRV_PCM_RATE_44100|SNDRV_PCM_RATE_48000,
 163                 .formats = SNDRV_PCM_FMTBIT_S16_LE,
 164         },
 165 },
 166 };
 167
 168 static const struct snd_soc_component_driver sst_component = {
 169         .name           = "sst",
 170 };
 171
 172 /* helper functions */
 173 static inline void sst_set_stream_status(struct sst_runtime_stream *stream,
 174                                         int state)
 175 {
 176         unsigned long flags;
 177         spin_lock_irqsave(&stream->status_lock, flags);
 178         stream->stream_status = state;
 179         spin_unlock_irqrestore(&stream->status_lock, flags);
 180 }
 181
 182 static inline int sst_get_stream_status(struct sst_runtime_stream *stream)
 183 {
 184         int state;
 185         unsigned long flags;
 186
 187         spin_lock_irqsave(&stream->status_lock, flags);
 188         state = stream->stream_status;
 189         spin_unlock_irqrestore(&stream->status_lock, flags);
 190         return state;
 191 }
 192
 193 static void sst_fill_pcm_params(struct snd_pcm_substream *substream,
 194                                 struct sst_pcm_params *param)
 195 {
 196
 197         param->codec = SST_CODEC_TYPE_PCM;
 198         param->num_chan = (u8) substream->runtime->channels;
 199         param->pcm_wd_sz = substream->runtime->sample_bits;
 200         param->reserved = 0;
 201         param->sfreq = substream->runtime->rate;
 202         param->ring_buffer_size = snd_pcm_lib_buffer_bytes(substream);
 203         param->period_count = substream->runtime->period_size;
 204         param->ring_buffer_addr = virt_to_phys(substream->dma_buffer.area);
 205         pr_debug("period_cnt = %d\n", param->period_count);
 206         pr_debug("sfreq= %d, wd_sz = %d\n", param->sfreq, param->pcm_wd_sz);
 207 }
 208
 209 static int sst_platform_alloc_stream(struct snd_pcm_substream *substream)
 210 {
 211         struct sst_runtime_stream *stream =
 212                         substream->runtime->private_data;
 213         struct sst_pcm_params param = {0};
 214         struct sst_stream_params str_params = {0};
 215         int ret_val;
 216
 217         /* set codec params and inform SST driver the same */
 218         sst_fill_pcm_params(substream, &param);
 219         substream->runtime->dma_area = substream->dma_buffer.area;
 220         str_params.sparams = param;
 221         str_params.codec =  param.codec;
 222         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 223                 str_params.ops = STREAM_OPS_PLAYBACK;
 224                 str_params.device_type = substream->pcm->device + 1;
 225                 pr_debug("Playbck stream,Device %d\n",
 226                                         substream->pcm->device);
 227         } else {
 228                 str_params.ops = STREAM_OPS_CAPTURE;
 229                 str_params.device_type = SND_SST_DEVICE_CAPTURE;
 230                 pr_debug("Capture stream,Device %d\n",
 231                                         substream->pcm->device);
 232         }
 233         ret_val = stream->ops->open(&str_params);
 234         pr_debug("SST_SND_PLAY/CAPTURE ret_val = %x\n", ret_val);
 235         if (ret_val < 0)
 236                 return ret_val;
 237
 238         stream->stream_info.str_id = ret_val;
 239         pr_debug("str id :  %d\n", stream->stream_info.str_id);
 240         return ret_val;
 241 }
 242
 243 static void sst_period_elapsed(void *mad_substream)
 244 {
 245         struct snd_pcm_substream *substream = mad_substream;
 246         struct sst_runtime_stream *stream;
 247         int status;
 248
 249         if (!substream || !substream->runtime)
 250                 return;
 251         stream = substream->runtime->private_data;
 252         if (!stream)
 253                 return;
 254         status = sst_get_stream_status(stream);
 255         if (status != SST_PLATFORM_RUNNING)
 256                 return;
 257         snd_pcm_period_elapsed(substream);
 258 }
 259
 260 static int sst_platform_init_stream(struct snd_pcm_substream *substream)
 261 {
 262         struct sst_runtime_stream *stream =
 263                         substream->runtime->private_data;
 264         int ret_val;
 265
 266         pr_debug("setting buffer ptr param\n");
 267         sst_set_stream_status(stream, SST_PLATFORM_INIT);
 268         stream->stream_info.period_elapsed = sst_period_elapsed;
 269         stream->stream_info.mad_substream = substream;
 270         stream->stream_info.buffer_ptr = 0;
 271         stream->stream_info.sfreq = substream->runtime->rate;
 272         ret_val = stream->ops->device_control(
 273                         SST_SND_STREAM_INIT, &stream->stream_info);
 274         if (ret_val)
 275                 pr_err("control_set ret error %d\n", ret_val);
 276         return ret_val;
 277
 278 }
 279 /* end -- helper functions */
 280
 281 static int sst_platform_open(struct snd_pcm_substream *substream)
 282 {
 283         struct snd_pcm_runtime *runtime = substream->runtime;
 284         struct sst_runtime_stream *stream;
 285         int ret_val;
 286
 287         pr_debug("sst_platform_open called\n");
 288
 289         snd_soc_set_runtime_hwparams(substream, &sst_platform_pcm_hw);
 290         ret_val = snd_pcm_hw_constraint_integer(runtime,
 291                                                 SNDRV_PCM_HW_PARAM_PERIODS);
 292         if (ret_val < 0)
 293                 return ret_val;
 294
 295         stream = kzalloc(sizeof(*stream), GFP_KERNEL);
 296         if (!stream)
 297                 return -ENOMEM;
 298         spin_lock_init(&stream->status_lock);
 299
 300         /* get the sst ops */
 301         mutex_lock(&sst_lock);
 302         if (!sst) {
 303                 pr_err("no device available to run\n");
 304                 mutex_unlock(&sst_lock);
 305                 kfree(stream);
 306                 return -ENODEV;
 307         }
 308         if (!try_module_get(sst->dev->driver->owner)) {
 309                 mutex_unlock(&sst_lock);
 310                 kfree(stream);
 311                 return -ENODEV;
 312         }
 313         stream->ops = sst->ops;
 314         mutex_unlock(&sst_lock);
 315
 316         stream->stream_info.str_id = 0;
 317         sst_set_stream_status(stream, SST_PLATFORM_INIT);
 318         stream->stream_info.mad_substream = substream;
 319         /* allocate memory for SST API set */
 320         runtime->private_data = stream;
 321
 322         return 0;
 323 }
 324
 325 static int sst_platform_close(struct snd_pcm_substream *substream)
 326 {
 327         struct sst_runtime_stream *stream;
 328         int ret_val = 0, str_id;
 329
 330         pr_debug("sst_platform_close called\n");
 331         stream = substream->runtime->private_data;
 332         str_id = stream->stream_info.str_id;
 333         if (str_id)
 334                 ret_val = stream->ops->close(str_id);
 335         module_put(sst->dev->driver->owner);
 336         kfree(stream);
 337         return ret_val;
 338 }
 339
 340 static int sst_platform_pcm_prepare(struct snd_pcm_substream *substream)
 341 {
 342         struct sst_runtime_stream *stream;
 343         int ret_val = 0, str_id;
 344
 345         pr_debug("sst_platform_pcm_prepare called\n");
 346         stream = substream->runtime->private_data;
 347         str_id = stream->stream_info.str_id;
 348         if (stream->stream_info.str_id) {
 349                 ret_val = stream->ops->device_control(
 350                                 SST_SND_DROP, &str_id);
 351                 return ret_val;
 352         }
 353
 354         ret_val = sst_platform_alloc_stream(substream);
 355         if (ret_val < 0)
 356                 return ret_val;
 357         snprintf(substream->pcm->id, sizeof(substream->pcm->id),
 358                         "%d", stream->stream_info.str_id);
 359
 360         ret_val = sst_platform_init_stream(substream);
 361         if (ret_val)
 362                 return ret_val;
 363         substream->runtime->hw.info = SNDRV_PCM_INFO_BLOCK_TRANSFER;
 364         return ret_val;
 365 }
 366
 367 static int sst_platform_pcm_trigger(struct snd_pcm_substream *substream,
 368                                         int cmd)
 369 {
 370         int ret_val = 0, str_id;
 371         struct sst_runtime_stream *stream;
 372         int str_cmd, status;
 373
 374         pr_debug("sst_platform_pcm_trigger called\n");
 375         stream = substream->runtime->private_data;
 376         str_id = stream->stream_info.str_id;
 377         switch (cmd) {
 378         case SNDRV_PCM_TRIGGER_START:
 379                 pr_debug("sst: Trigger Start\n");
 380                 str_cmd = SST_SND_START;
 381                 status = SST_PLATFORM_RUNNING;
 382                 stream->stream_info.mad_substream = substream;
 383                 break;
 384         case SNDRV_PCM_TRIGGER_STOP:
 385                 pr_debug("sst: in stop\n");
 386                 str_cmd = SST_SND_DROP;
 387                 status = SST_PLATFORM_DROPPED;
 388                 break;
 389         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
 390                 pr_debug("sst: in pause\n");
 391                 str_cmd = SST_SND_PAUSE;
 392                 status = SST_PLATFORM_PAUSED;
 393                 break;
 394         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
 395                 pr_debug("sst: in pause release\n");
 396                 str_cmd = SST_SND_RESUME;
 397                 status = SST_PLATFORM_RUNNING;
 398                 break;
 399         default:
 400                 return -EINVAL;
 401         }
 402         ret_val = stream->ops->device_control(str_cmd, &str_id);
 403         if (!ret_val)
 404                 sst_set_stream_status(stream, status);
 405
 406         return ret_val;
 407 }
 408
 409
 410 static snd_pcm_uframes_t sst_platform_pcm_pointer
 411                         (struct snd_pcm_substream *substream)
 412 {
 413         struct sst_runtime_stream *stream;
 414         int ret_val, status;
 415         struct pcm_stream_info *str_info;
 416
 417         stream = substream->runtime->private_data;
 418         status = sst_get_stream_status(stream);
 419         if (status == SST_PLATFORM_INIT)
 420                 return 0;
 421         str_info = &stream->stream_info;
 422         ret_val = stream->ops->device_control(
 423                                 SST_SND_BUFFER_POINTER, str_info);
 424         if (ret_val) {
 425                 pr_err("sst: error code = %d\n", ret_val);
 426                 return ret_val;
 427         }
 428         return stream->stream_info.buffer_ptr;
 429 }
 430
 431 static int sst_platform_pcm_hw_params(struct snd_pcm_substream *substream,
 432                 struct snd_pcm_hw_params *params)
 433 {
 434         snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(params));
 435         memset(substream->runtime->dma_area, 0, params_buffer_bytes(params));
 436
 437         return 0;
 438 }
 439
 440 static int sst_platform_pcm_hw_free(struct snd_pcm_substream *substream)
 441 {
 442         return snd_pcm_lib_free_pages(substream);
 443 }
 444
 445 static struct snd_pcm_ops sst_platform_ops = {
 446         .open = sst_platform_open,
 447         .close = sst_platform_close,
 448         .ioctl = snd_pcm_lib_ioctl,
 449         .prepare = sst_platform_pcm_prepare,
 450         .trigger = sst_platform_pcm_trigger,
 451         .pointer = sst_platform_pcm_pointer,
 452         .hw_params = sst_platform_pcm_hw_params,
 453         .hw_free = sst_platform_pcm_hw_free,
 454 };
 455
 456 static void sst_pcm_free(struct snd_pcm *pcm)
 457 {
 458         pr_debug("sst_pcm_free called\n");
 459         snd_pcm_lib_preallocate_free_for_all(pcm);
 460 }
 461
 462 static int sst_pcm_new(struct snd_soc_pcm_runtime *rtd)
 463 {
 464         struct snd_pcm *pcm = rtd->pcm;
 465         int retval = 0;
 466
 467         pr_debug("sst_pcm_new called\n");
 468         if (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream ||
 469                         pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream) {
 470                 retval =  snd_pcm_lib_preallocate_pages_for_all(pcm,
 471                         SNDRV_DMA_TYPE_CONTINUOUS,
 472                         snd_dma_continuous_data(GFP_KERNEL),
 473                         SST_MIN_BUFFER, SST_MAX_BUFFER);
 474                 if (retval) {
 475                         pr_err("dma buffer allocationf fail\n");
 476                         return retval;
 477                 }
 478         }
 479         return retval;
 480 }
 481
 482 /* compress stream operations */
 483 static void sst_compr_fragment_elapsed(void *arg)
 484 {
 485         struct snd_compr_stream *cstream = (struct snd_compr_stream *)arg;
 486
 487         pr_debug("fragment elapsed by driver\n");
 488         if (cstream)
 489                 snd_compr_fragment_elapsed(cstream);
 490 }
 491
 492 static int sst_platform_compr_open(struct snd_compr_stream *cstream)
 493 {
 494
 495         int ret_val = 0;
 496         struct snd_compr_runtime *runtime = cstream->runtime;
 497         struct sst_runtime_stream *stream;
 498
 499         stream = kzalloc(sizeof(*stream), GFP_KERNEL);
 500         if (!stream)
 501                 return -ENOMEM;
 502
 503         spin_lock_init(&stream->status_lock);
 504
 505         /* get the sst ops */
 506         if (!sst || !try_module_get(sst->dev->driver->owner)) {
 507                 pr_err("no device available to run\n");
 508                 ret_val = -ENODEV;
 509                 goto out_ops;
 510         }
 511         stream->compr_ops = sst->compr_ops;
 512
 513         stream->id = 0;
 514         sst_set_stream_status(stream, SST_PLATFORM_INIT);
 515         runtime->private_data = stream;
 516         return 0;
 517 out_ops:
 518         kfree(stream);
 519         return ret_val;
 520 }
 521
 522 static int sst_platform_compr_free(struct snd_compr_stream *cstream)
 523 {
 524         struct sst_runtime_stream *stream;
 525         int ret_val = 0, str_id;
 526
 527         stream = cstream->runtime->private_data;
 528         /*need to check*/
 529         str_id = stream->id;
 530         if (str_id)
 531                 ret_val = stream->compr_ops->close(str_id);
 532         module_put(sst->dev->driver->owner);
 533         kfree(stream);
 534         pr_debug("%s: %d\n", __func__, ret_val);
 535         return 0;
 536 }
 537
 538 static int sst_platform_compr_set_params(struct snd_compr_stream *cstream,
 539                                         struct snd_compr_params *params)
 540 {
 541         struct sst_runtime_stream *stream;
 542         int retval;
 543         struct snd_sst_params str_params;
 544         struct sst_compress_cb cb;
 545
 546         stream = cstream->runtime->private_data;
 547         /* construct fw structure for this*/
 548         memset(&str_params, 0, sizeof(str_params));
 549
 550         str_params.ops = STREAM_OPS_PLAYBACK;
 551         str_params.stream_type = SST_STREAM_TYPE_MUSIC;
 552         str_params.device_type = SND_SST_DEVICE_COMPRESS;
 553
 554         switch (params->codec.id) {
 555         case SND_AUDIOCODEC_MP3: {
 556                 str_params.codec = SST_CODEC_TYPE_MP3;
 557                 str_params.sparams.uc.mp3_params.codec = SST_CODEC_TYPE_MP3;
 558                 str_params.sparams.uc.mp3_params.num_chan = params->codec.ch_in;
 559                 str_params.sparams.uc.mp3_params.pcm_wd_sz = 16;
 560                 break;
 561         }
 562
 563         case SND_AUDIOCODEC_AAC: {
 564                 str_params.codec = SST_CODEC_TYPE_AAC;
 565                 str_params.sparams.uc.aac_params.codec = SST_CODEC_TYPE_AAC;
 566                 str_params.sparams.uc.aac_params.num_chan = params->codec.ch_in;
 567                 str_params.sparams.uc.aac_params.pcm_wd_sz = 16;
 568                 if (params->codec.format == SND_AUDIOSTREAMFORMAT_MP4ADTS)
 569                         str_params.sparams.uc.aac_params.bs_format =
 570                                                         AAC_BIT_STREAM_ADTS;
 571                 else if (params->codec.format == SND_AUDIOSTREAMFORMAT_RAW)
 572                         str_params.sparams.uc.aac_params.bs_format =
 573                                                         AAC_BIT_STREAM_RAW;
 574                 else {
 575                         pr_err("Undefined format%d\n", params->codec.format);
 576                         return -EINVAL;
 577                 }
 578                 str_params.sparams.uc.aac_params.externalsr =
 579                                                 params->codec.sample_rate;
 580                 break;
 581         }
 582
 583         default:
 584                 pr_err("codec not supported, id =%d\n", params->codec.id);
 585                 return -EINVAL;
 586         }
 587
 588         str_params.aparams.ring_buf_info[0].addr  =
 589                                         virt_to_phys(cstream->runtime->buffer);
 590         str_params.aparams.ring_buf_info[0].size =
 591                                         cstream->runtime->buffer_size;
 592         str_params.aparams.sg_count = 1;
 593         str_params.aparams.frag_size = cstream->runtime->fragment_size;
 594
 595         cb.param = cstream;
 596         cb.compr_cb = sst_compr_fragment_elapsed;
 597
 598         retval = stream->compr_ops->open(&str_params, &cb);
 599         if (retval < 0) {
 600                 pr_err("stream allocation failed %d\n", retval);
 601                 return retval;
 602         }
 603
 604         stream->id = retval;
 605         return 0;
 606 }
 607
 608 static int sst_platform_compr_trigger(struct snd_compr_stream *cstream, int cmd)
 609 {
 610         struct sst_runtime_stream *stream =
 611                 cstream->runtime->private_data;
 612
 613         return stream->compr_ops->control(cmd, stream->id);
 614 }
 615
 616 static int sst_platform_compr_pointer(struct snd_compr_stream *cstream,
 617                                         struct snd_compr_tstamp *tstamp)
 618 {
 619         struct sst_runtime_stream *stream;
 620
 621         stream  = cstream->runtime->private_data;
 622         stream->compr_ops->tstamp(stream->id, tstamp);
 623         tstamp->byte_offset = tstamp->copied_total %
 624                                  (u32)cstream->runtime->buffer_size;
 625         pr_debug("calc bytes offset/copied bytes as %d\n", tstamp->byte_offset);
 626         return 0;
 627 }
 628
 629 static int sst_platform_compr_ack(struct snd_compr_stream *cstream,
 630                                         size_t bytes)
 631 {
 632         struct sst_runtime_stream *stream;
 633
 634         stream  = cstream->runtime->private_data;
 635         stream->compr_ops->ack(stream->id, (unsigned long)bytes);
 636         stream->bytes_written += bytes;
 637
 638         return 0;
 639 }
 640
 641 static int sst_platform_compr_get_caps(struct snd_compr_stream *cstream,
 642                                         struct snd_compr_caps *caps)
 643 {
 644         struct sst_runtime_stream *stream =
 645                 cstream->runtime->private_data;
 646
 647         return stream->compr_ops->get_caps(caps);
 648 }
 649
 650 static int sst_platform_compr_get_codec_caps(struct snd_compr_stream *cstream,
 651                                         struct snd_compr_codec_caps *codec)
 652 {
 653         struct sst_runtime_stream *stream =
 654                 cstream->runtime->private_data;
 655
 656         return stream->compr_ops->get_codec_caps(codec);
 657 }
 658
 659 static int sst_platform_compr_set_metadata(struct snd_compr_stream *cstream,
 660                                         struct snd_compr_metadata *metadata)
 661 {
 662         struct sst_runtime_stream *stream  =
 663                  cstream->runtime->private_data;
 664
 665         return stream->compr_ops->set_metadata(stream->id, metadata);
 666 }
 667
 668 static struct snd_compr_ops sst_platform_compr_ops = {
 669
 670         .open = sst_platform_compr_open,
 671         .free = sst_platform_compr_free,
 672         .set_params = sst_platform_compr_set_params,
 673         .set_metadata = sst_platform_compr_set_metadata,
 674         .trigger = sst_platform_compr_trigger,
 675         .pointer = sst_platform_compr_pointer,
 676         .ack = sst_platform_compr_ack,
 677         .get_caps = sst_platform_compr_get_caps,
 678         .get_codec_caps = sst_platform_compr_get_codec_caps,
 679 };
 680
 681 static struct snd_soc_platform_driver sst_soc_platform_drv = {
 682         .ops            = &sst_platform_ops,
 683         .compr_ops      = &sst_platform_compr_ops,
 684         .pcm_new        = sst_pcm_new,
 685         .pcm_free       = sst_pcm_free,
 686 };
 687
 688 static int sst_platform_probe(struct platform_device *pdev)
 689 {
 690         int ret;
 691
 692         pr_debug("sst_platform_probe called\n");
 693         sst = NULL;
 694         ret = snd_soc_register_platform(&pdev->dev, &sst_soc_platform_drv);
 695         if (ret) {
 696                 pr_err("registering soc platform failed\n");
 697                 return ret;
 698         }
 699
 700         ret = snd_soc_register_component(&pdev->dev, &sst_component,
 701                                 sst_platform_dai, ARRAY_SIZE(sst_platform_dai));
 702         if (ret) {
 703                 pr_err("registering cpu dais failed\n");
 704                 snd_soc_unregister_platform(&pdev->dev);
 705         }
 706         return ret;
 707 }
 708
 709 static int sst_platform_remove(struct platform_device *pdev)
 710 {
 711
 712         snd_soc_unregister_component(&pdev->dev);
 713         snd_soc_unregister_platform(&pdev->dev);
 714         pr_debug("sst_platform_remove success\n");
 715         return 0;
 716 }
 717
 718 static struct platform_driver sst_platform_driver = {
 719         .driver         = {
 720                 .name           = "sst-platform",
 721                 .owner          = THIS_MODULE,
 722         },
 723         .probe          = sst_platform_probe,
 724         .remove         = sst_platform_remove,
 725 };
 726
 727 module_platform_driver(sst_platform_driver);
 728
 729 MODULE_DESCRIPTION("ASoC Intel(R) MID Platform driver");
 730 MODULE_AUTHOR("Vinod Koul <vinod.koul@intel.com>");
 731 MODULE_AUTHOR("Harsha Priya <priya.harsha@intel.com>");
 732 MODULE_LICENSE("GPL v2");
 733 MODULE_ALIAS("platform:sst-platform");