sound/soc/intel/atom/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
  37 int sst_register_dsp(struct sst_device *dev)
  38 {
  39         if (WARN_ON(!dev))
  40                 return -EINVAL;
  41         if (!try_module_get(dev->dev->driver->owner))
  42                 return -ENODEV;
  43         mutex_lock(&sst_lock);
  44         if (sst) {
  45                 dev_err(dev->dev, "we already have a device %s\n", sst->name);
  46                 module_put(dev->dev->driver->owner);
  47                 mutex_unlock(&sst_lock);
  48                 return -EEXIST;
  49         }
  50         dev_dbg(dev->dev, "registering device %s\n", dev->name);
  51         sst = dev;
  52         mutex_unlock(&sst_lock);
  53         return 0;
  54 }
  55 EXPORT_SYMBOL_GPL(sst_register_dsp);
  56
  57 int sst_unregister_dsp(struct sst_device *dev)
  58 {
  59         if (WARN_ON(!dev))
  60                 return -EINVAL;
  61         if (dev != sst)
  62                 return -EINVAL;
  63
  64         mutex_lock(&sst_lock);
  65
  66         if (!sst) {
  67                 mutex_unlock(&sst_lock);
  68                 return -EIO;
  69         }
  70
  71         module_put(sst->dev->driver->owner);
  72         dev_dbg(dev->dev, "unreg %s\n", sst->name);
  73         sst = NULL;
  74         mutex_unlock(&sst_lock);
  75         return 0;
  76 }
  77 EXPORT_SYMBOL_GPL(sst_unregister_dsp);
  78
  79 static struct snd_pcm_hardware sst_platform_pcm_hw = {
  80         .info = (SNDRV_PCM_INFO_INTERLEAVED |
  81                         SNDRV_PCM_INFO_DOUBLE |
  82                         SNDRV_PCM_INFO_PAUSE |
  83                         SNDRV_PCM_INFO_RESUME |
  84                         SNDRV_PCM_INFO_MMAP|
  85                         SNDRV_PCM_INFO_MMAP_VALID |
  86                         SNDRV_PCM_INFO_BLOCK_TRANSFER |
  87                         SNDRV_PCM_INFO_SYNC_START),
  88         .buffer_bytes_max = SST_MAX_BUFFER,
  89         .period_bytes_min = SST_MIN_PERIOD_BYTES,
  90         .period_bytes_max = SST_MAX_PERIOD_BYTES,
  91         .periods_min = SST_MIN_PERIODS,
  92         .periods_max = SST_MAX_PERIODS,
  93         .fifo_size = SST_FIFO_SIZE,
  94 };
  95
  96 static struct sst_dev_stream_map dpcm_strm_map[] = {
  97         {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF}, /* Reserved, not in use */
  98         {MERR_DPCM_AUDIO, 0, SNDRV_PCM_STREAM_PLAYBACK, PIPE_MEDIA1_IN, SST_TASK_ID_MEDIA, 0},
  99         {MERR_DPCM_COMPR, 0, SNDRV_PCM_STREAM_PLAYBACK, PIPE_MEDIA0_IN, SST_TASK_ID_MEDIA, 0},
 100         {MERR_DPCM_AUDIO, 0, SNDRV_PCM_STREAM_CAPTURE, PIPE_PCM1_OUT, SST_TASK_ID_MEDIA, 0},
 101 };
 102
 103 static int sst_media_digital_mute(struct snd_soc_dai *dai, int mute, int stream)
 104 {
 105
 106         return sst_send_pipe_gains(dai, stream, mute);
 107 }
 108
 109 /* helper functions */
 110 void sst_set_stream_status(struct sst_runtime_stream *stream,
 111                                         int state)
 112 {
 113         unsigned long flags;
 114         spin_lock_irqsave(&stream->status_lock, flags);
 115         stream->stream_status = state;
 116         spin_unlock_irqrestore(&stream->status_lock, flags);
 117 }
 118
 119 static inline int sst_get_stream_status(struct sst_runtime_stream *stream)
 120 {
 121         int state;
 122         unsigned long flags;
 123
 124         spin_lock_irqsave(&stream->status_lock, flags);
 125         state = stream->stream_status;
 126         spin_unlock_irqrestore(&stream->status_lock, flags);
 127         return state;
 128 }
 129
 130 static void sst_fill_alloc_params(struct snd_pcm_substream *substream,
 131                                 struct snd_sst_alloc_params_ext *alloc_param)
 132 {
 133         unsigned int channels;
 134         snd_pcm_uframes_t period_size;
 135         ssize_t periodbytes;
 136         ssize_t buffer_bytes = snd_pcm_lib_buffer_bytes(substream);
 137         u32 buffer_addr = virt_to_phys(substream->dma_buffer.area);
 138
 139         channels = substream->runtime->channels;
 140         period_size = substream->runtime->period_size;
 141         periodbytes = samples_to_bytes(substream->runtime, period_size);
 142         alloc_param->ring_buf_info[0].addr = buffer_addr;
 143         alloc_param->ring_buf_info[0].size = buffer_bytes;
 144         alloc_param->sg_count = 1;
 145         alloc_param->reserved = 0;
 146         alloc_param->frag_size = periodbytes * channels;
 147
 148 }
 149 static void sst_fill_pcm_params(struct snd_pcm_substream *substream,
 150                                 struct snd_sst_stream_params *param)
 151 {
 152         param->uc.pcm_params.num_chan = (u8) substream->runtime->channels;
 153         param->uc.pcm_params.pcm_wd_sz = substream->runtime->sample_bits;
 154         param->uc.pcm_params.sfreq = substream->runtime->rate;
 155
 156         /* PCM stream via ALSA interface */
 157         param->uc.pcm_params.use_offload_path = 0;
 158         param->uc.pcm_params.reserved2 = 0;
 159         memset(param->uc.pcm_params.channel_map, 0, sizeof(u8));
 160
 161 }
 162
 163 static int sst_get_stream_mapping(int dev, int sdev, int dir,
 164         struct sst_dev_stream_map *map, int size)
 165 {
 166         int i;
 167
 168         if (map == NULL)
 169                 return -EINVAL;
 170
 171
 172         /* index 0 is not used in stream map */
 173         for (i = 1; i < size; i++) {
 174                 if ((map[i].dev_num == dev) && (map[i].direction == dir))
 175                         return i;
 176         }
 177         return 0;
 178 }
 179
 180 int sst_fill_stream_params(void *substream,
 181         const struct sst_data *ctx, struct snd_sst_params *str_params, bool is_compress)
 182 {
 183         int map_size;
 184         int index;
 185         struct sst_dev_stream_map *map;
 186         struct snd_pcm_substream *pstream = NULL;
 187         struct snd_compr_stream *cstream = NULL;
 188
 189         map = ctx->pdata->pdev_strm_map;
 190         map_size = ctx->pdata->strm_map_size;
 191
 192         if (is_compress == true)
 193                 cstream = (struct snd_compr_stream *)substream;
 194         else
 195                 pstream = (struct snd_pcm_substream *)substream;
 196
 197         str_params->stream_type = SST_STREAM_TYPE_MUSIC;
 198
 199         /* For pcm streams */
 200         if (pstream) {
 201                 index = sst_get_stream_mapping(pstream->pcm->device,
 202                                           pstream->number, pstream->stream,
 203                                           map, map_size);
 204                 if (index <= 0)
 205                         return -EINVAL;
 206
 207                 str_params->stream_id = index;
 208                 str_params->device_type = map[index].device_id;
 209                 str_params->task = map[index].task_id;
 210
 211                 str_params->ops = (u8)pstream->stream;
 212         }
 213
 214         if (cstream) {
 215                 index = sst_get_stream_mapping(cstream->device->device,
 216                                                0, cstream->direction,
 217                                                map, map_size);
 218                 if (index <= 0)
 219                         return -EINVAL;
 220                 str_params->stream_id = index;
 221                 str_params->device_type = map[index].device_id;
 222                 str_params->task = map[index].task_id;
 223
 224                 str_params->ops = (u8)cstream->direction;
 225         }
 226         return 0;
 227 }
 228
 229 static int sst_platform_alloc_stream(struct snd_pcm_substream *substream,
 230                 struct snd_soc_dai *dai)
 231 {
 232         struct sst_runtime_stream *stream =
 233                         substream->runtime->private_data;
 234         struct snd_sst_stream_params param = {{{0,},},};
 235         struct snd_sst_params str_params = {0};
 236         struct snd_sst_alloc_params_ext alloc_params = {0};
 237         int ret_val = 0;
 238         struct sst_data *ctx = snd_soc_dai_get_drvdata(dai);
 239
 240         /* set codec params and inform SST driver the same */
 241         sst_fill_pcm_params(substream, &param);
 242         sst_fill_alloc_params(substream, &alloc_params);
 243         substream->runtime->dma_area = substream->dma_buffer.area;
 244         str_params.sparams = param;
 245         str_params.aparams = alloc_params;
 246         str_params.codec = SST_CODEC_TYPE_PCM;
 247
 248         /* fill the device type and stream id to pass to SST driver */
 249         ret_val = sst_fill_stream_params(substream, ctx, &str_params, false);
 250         if (ret_val < 0)
 251                 return ret_val;
 252
 253         stream->stream_info.str_id = str_params.stream_id;
 254
 255         ret_val = stream->ops->open(sst->dev, &str_params);
 256         if (ret_val <= 0)
 257                 return ret_val;
 258
 259
 260         return ret_val;
 261 }
 262
 263 static void sst_period_elapsed(void *arg)
 264 {
 265         struct snd_pcm_substream *substream = arg;
 266         struct sst_runtime_stream *stream;
 267         int status;
 268
 269         if (!substream || !substream->runtime)
 270                 return;
 271         stream = substream->runtime->private_data;
 272         if (!stream)
 273                 return;
 274         status = sst_get_stream_status(stream);
 275         if (status != SST_PLATFORM_RUNNING)
 276                 return;
 277         snd_pcm_period_elapsed(substream);
 278 }
 279
 280 static int sst_platform_init_stream(struct snd_pcm_substream *substream)
 281 {
 282         struct sst_runtime_stream *stream =
 283                         substream->runtime->private_data;
 284         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 285         int ret_val;
 286
 287         dev_dbg(rtd->dev, "setting buffer ptr param\n");
 288         sst_set_stream_status(stream, SST_PLATFORM_INIT);
 289         stream->stream_info.period_elapsed = sst_period_elapsed;
 290         stream->stream_info.arg = substream;
 291         stream->stream_info.buffer_ptr = 0;
 292         stream->stream_info.sfreq = substream->runtime->rate;
 293         ret_val = stream->ops->stream_init(sst->dev, &stream->stream_info);
 294         if (ret_val)
 295                 dev_err(rtd->dev, "control_set ret error %d\n", ret_val);
 296         return ret_val;
 297
 298 }
 299
 300 static int power_up_sst(struct sst_runtime_stream *stream)
 301 {
 302         return stream->ops->power(sst->dev, true);
 303 }
 304
 305 static void power_down_sst(struct sst_runtime_stream *stream)
 306 {
 307         stream->ops->power(sst->dev, false);
 308 }
 309
 310 static int sst_media_open(struct snd_pcm_substream *substream,
 311                 struct snd_soc_dai *dai)
 312 {
 313         int ret_val = 0;
 314         struct snd_pcm_runtime *runtime = substream->runtime;
 315         struct sst_runtime_stream *stream;
 316
 317         stream = kzalloc(sizeof(*stream), GFP_KERNEL);
 318         if (!stream)
 319                 return -ENOMEM;
 320         spin_lock_init(&stream->status_lock);
 321
 322         /* get the sst ops */
 323         mutex_lock(&sst_lock);
 324         if (!sst ||
 325             !try_module_get(sst->dev->driver->owner)) {
 326                 dev_err(dai->dev, "no device available to run\n");
 327                 ret_val = -ENODEV;
 328                 goto out_ops;
 329         }
 330         stream->ops = sst->ops;
 331         mutex_unlock(&sst_lock);
 332
 333         stream->stream_info.str_id = 0;
 334
 335         stream->stream_info.arg = substream;
 336         /* allocate memory for SST API set */
 337         runtime->private_data = stream;
 338
 339         ret_val = power_up_sst(stream);
 340         if (ret_val < 0)
 341                 return ret_val;
 342
 343         /* Make sure, that the period size is always even */
 344         snd_pcm_hw_constraint_step(substream->runtime, 0,
 345                            SNDRV_PCM_HW_PARAM_PERIODS, 2);
 346
 347         return snd_pcm_hw_constraint_integer(runtime,
 348                          SNDRV_PCM_HW_PARAM_PERIODS);
 349 out_ops:
 350         kfree(stream);
 351         mutex_unlock(&sst_lock);
 352         return ret_val;
 353 }
 354
 355 static void sst_media_close(struct snd_pcm_substream *substream,
 356                 struct snd_soc_dai *dai)
 357 {
 358         struct sst_runtime_stream *stream;
 359         int ret_val = 0, str_id;
 360
 361         stream = substream->runtime->private_data;
 362         power_down_sst(stream);
 363
 364         str_id = stream->stream_info.str_id;
 365         if (str_id)
 366                 ret_val = stream->ops->close(sst->dev, str_id);
 367         module_put(sst->dev->driver->owner);
 368         kfree(stream);
 369 }
 370
 371 static inline unsigned int get_current_pipe_id(struct snd_soc_dai *dai,
 372                                                struct snd_pcm_substream *substream)
 373 {
 374         struct sst_data *sst = snd_soc_dai_get_drvdata(dai);
 375         struct sst_dev_stream_map *map = sst->pdata->pdev_strm_map;
 376         struct sst_runtime_stream *stream =
 377                         substream->runtime->private_data;
 378         u32 str_id = stream->stream_info.str_id;
 379         unsigned int pipe_id;
 380
 381         pipe_id = map[str_id].device_id;
 382
 383         dev_dbg(dai->dev, "got pipe_id = %#x for str_id = %d\n",
 384                         pipe_id, str_id);
 385         return pipe_id;
 386 }
 387
 388 static int sst_media_prepare(struct snd_pcm_substream *substream,
 389                 struct snd_soc_dai *dai)
 390 {
 391         struct sst_runtime_stream *stream;
 392         int ret_val = 0, str_id;
 393
 394         stream = substream->runtime->private_data;
 395         str_id = stream->stream_info.str_id;
 396         if (stream->stream_info.str_id) {
 397                 ret_val = stream->ops->stream_drop(sst->dev, str_id);
 398                 return ret_val;
 399         }
 400
 401         ret_val = sst_platform_alloc_stream(substream, dai);
 402         if (ret_val <= 0)
 403                 return ret_val;
 404         snprintf(substream->pcm->id, sizeof(substream->pcm->id),
 405                         "%d", stream->stream_info.str_id);
 406
 407         ret_val = sst_platform_init_stream(substream);
 408         if (ret_val)
 409                 return ret_val;
 410         substream->runtime->hw.info = SNDRV_PCM_INFO_BLOCK_TRANSFER;
 411         return ret_val;
 412 }
 413
 414 static int sst_media_hw_params(struct snd_pcm_substream *substream,
 415                                 struct snd_pcm_hw_params *params,
 416                                 struct snd_soc_dai *dai)
 417 {
 418         snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(params));
 419         memset(substream->runtime->dma_area, 0, params_buffer_bytes(params));
 420         return 0;
 421 }
 422
 423 static int sst_media_hw_free(struct snd_pcm_substream *substream,
 424                 struct snd_soc_dai *dai)
 425 {
 426         return snd_pcm_lib_free_pages(substream);
 427 }
 428
 429 static int sst_enable_ssp(struct snd_pcm_substream *substream,
 430                         struct snd_soc_dai *dai)
 431 {
 432         int ret = 0;
 433
 434         if (!dai->active) {
 435                 ret = sst_handle_vb_timer(dai, true);
 436                 sst_fill_ssp_defaults(dai);
 437         }
 438         return ret;
 439 }
 440
 441 static int sst_be_hw_params(struct snd_pcm_substream *substream,
 442                                 struct snd_pcm_hw_params *params,
 443                                 struct snd_soc_dai *dai)
 444 {
 445         int ret = 0;
 446
 447         if (dai->active == 1)
 448                 ret = send_ssp_cmd(dai, dai->name, 1);
 449         return ret;
 450 }
 451
 452 static int sst_set_format(struct snd_soc_dai *dai, unsigned int fmt)
 453 {
 454         int ret = 0;
 455
 456         if (!dai->active)
 457                 return 0;
 458
 459         ret = sst_fill_ssp_config(dai, fmt);
 460         if (ret < 0)
 461                 dev_err(dai->dev, "sst_set_format failed..\n");
 462
 463         return ret;
 464 }
 465
 466 static int sst_platform_set_ssp_slot(struct snd_soc_dai *dai,
 467                         unsigned int tx_mask, unsigned int rx_mask,
 468                         int slots, int slot_width) {
 469         int ret = 0;
 470
 471         if (!dai->active)
 472                 return ret;
 473
 474         ret = sst_fill_ssp_slot(dai, tx_mask, rx_mask, slots, slot_width);
 475         if (ret < 0)
 476                 dev_err(dai->dev, "sst_fill_ssp_slot failed..%d\n", ret);
 477
 478         return ret;
 479 }
 480
 481 static void sst_disable_ssp(struct snd_pcm_substream *substream,
 482                         struct snd_soc_dai *dai)
 483 {
 484         if (!dai->active) {
 485                 send_ssp_cmd(dai, dai->name, 0);
 486                 sst_handle_vb_timer(dai, false);
 487         }
 488 }
 489
 490 static struct snd_soc_dai_ops sst_media_dai_ops = {
 491         .startup = sst_media_open,
 492         .shutdown = sst_media_close,
 493         .prepare = sst_media_prepare,
 494         .hw_params = sst_media_hw_params,
 495         .hw_free = sst_media_hw_free,
 496         .mute_stream = sst_media_digital_mute,
 497 };
 498
 499 static struct snd_soc_dai_ops sst_compr_dai_ops = {
 500         .mute_stream = sst_media_digital_mute,
 501 };
 502
 503 static struct snd_soc_dai_ops sst_be_dai_ops = {
 504         .startup = sst_enable_ssp,
 505         .hw_params = sst_be_hw_params,
 506         .set_fmt = sst_set_format,
 507         .set_tdm_slot = sst_platform_set_ssp_slot,
 508         .shutdown = sst_disable_ssp,
 509 };
 510
 511 static struct snd_soc_dai_driver sst_platform_dai[] = {
 512 {
 513         .name = "media-cpu-dai",
 514         .ops = &sst_media_dai_ops,
 515         .playback = {
 516                 .stream_name = "Headset Playback",
 517                 .channels_min = SST_STEREO,
 518                 .channels_max = SST_STEREO,
 519                 .rates = SNDRV_PCM_RATE_44100|SNDRV_PCM_RATE_48000,
 520                 .formats = SNDRV_PCM_FMTBIT_S16_LE,
 521         },
 522         .capture = {
 523                 .stream_name = "Headset Capture",
 524                 .channels_min = 1,
 525                 .channels_max = 2,
 526                 .rates = SNDRV_PCM_RATE_44100|SNDRV_PCM_RATE_48000,
 527                 .formats = SNDRV_PCM_FMTBIT_S16_LE,
 528         },
 529 },
 530 {
 531         .name = "compress-cpu-dai",
 532         .compress_dai = 1,
 533         .ops = &sst_compr_dai_ops,
 534         .playback = {
 535                 .stream_name = "Compress Playback",
 536                 .channels_min = SST_STEREO,
 537                 .channels_max = SST_STEREO,
 538                 .rates = SNDRV_PCM_RATE_48000,
 539                 .formats = SNDRV_PCM_FMTBIT_S16_LE,
 540         },
 541 },
 542 /* BE CPU  Dais */
 543 {
 544         .name = "ssp0-port",
 545         .ops = &sst_be_dai_ops,
 546         .playback = {
 547                 .stream_name = "ssp0 Tx",
 548                 .channels_min = SST_STEREO,
 549                 .channels_max = SST_STEREO,
 550                 .rates = SNDRV_PCM_RATE_48000,
 551                 .formats = SNDRV_PCM_FMTBIT_S16_LE,
 552         },
 553         .capture = {
 554                 .stream_name = "ssp0 Rx",
 555                 .channels_min = SST_STEREO,
 556                 .channels_max = SST_STEREO,
 557                 .rates = SNDRV_PCM_RATE_48000,
 558                 .formats = SNDRV_PCM_FMTBIT_S16_LE,
 559         },
 560 },
 561 {
 562         .name = "ssp1-port",
 563         .ops = &sst_be_dai_ops,
 564         .playback = {
 565                 .stream_name = "ssp1 Tx",
 566                 .channels_min = SST_STEREO,
 567                 .channels_max = SST_STEREO,
 568                 .rates = SNDRV_PCM_RATE_8000|SNDRV_PCM_RATE_16000|SNDRV_PCM_RATE_48000,
 569                 .formats = SNDRV_PCM_FMTBIT_S16_LE,
 570         },
 571         .capture = {
 572                 .stream_name = "ssp1 Rx",
 573                 .channels_min = SST_STEREO,
 574                 .channels_max = SST_STEREO,
 575                 .rates = SNDRV_PCM_RATE_8000|SNDRV_PCM_RATE_16000|SNDRV_PCM_RATE_48000,
 576                 .formats = SNDRV_PCM_FMTBIT_S16_LE,
 577         },
 578 },
 579 {
 580         .name = "ssp2-port",
 581         .ops = &sst_be_dai_ops,
 582         .playback = {
 583                 .stream_name = "ssp2 Tx",
 584                 .channels_min = SST_STEREO,
 585                 .channels_max = SST_STEREO,
 586                 .rates = SNDRV_PCM_RATE_48000,
 587                 .formats = SNDRV_PCM_FMTBIT_S16_LE,
 588         },
 589         .capture = {
 590                 .stream_name = "ssp2 Rx",
 591                 .channels_min = SST_STEREO,
 592                 .channels_max = SST_STEREO,
 593                 .rates = SNDRV_PCM_RATE_48000,
 594                 .formats = SNDRV_PCM_FMTBIT_S16_LE,
 595         },
 596 },
 597 };
 598
 599 static int sst_platform_open(struct snd_pcm_substream *substream)
 600 {
 601         struct snd_pcm_runtime *runtime;
 602
 603         if (substream->pcm->internal)
 604                 return 0;
 605
 606         runtime = substream->runtime;
 607         runtime->hw = sst_platform_pcm_hw;
 608         return 0;
 609 }
 610
 611 static int sst_platform_pcm_trigger(struct snd_pcm_substream *substream,
 612                                         int cmd)
 613 {
 614         int ret_val = 0, str_id;
 615         struct sst_runtime_stream *stream;
 616         int status;
 617         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 618
 619         dev_dbg(rtd->dev, "sst_platform_pcm_trigger called\n");
 620         if (substream->pcm->internal)
 621                 return 0;
 622         stream = substream->runtime->private_data;
 623         str_id = stream->stream_info.str_id;
 624         switch (cmd) {
 625         case SNDRV_PCM_TRIGGER_START:
 626                 dev_dbg(rtd->dev, "sst: Trigger Start\n");
 627                 status = SST_PLATFORM_RUNNING;
 628                 stream->stream_info.arg = substream;
 629                 ret_val = stream->ops->stream_start(sst->dev, str_id);
 630                 break;
 631         case SNDRV_PCM_TRIGGER_STOP:
 632                 dev_dbg(rtd->dev, "sst: in stop\n");
 633                 status = SST_PLATFORM_DROPPED;
 634                 ret_val = stream->ops->stream_drop(sst->dev, str_id);
 635                 break;
 636         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
 637         case SNDRV_PCM_TRIGGER_SUSPEND:
 638                 dev_dbg(rtd->dev, "sst: in pause\n");
 639                 status = SST_PLATFORM_PAUSED;
 640                 ret_val = stream->ops->stream_pause(sst->dev, str_id);
 641                 break;
 642         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
 643         case SNDRV_PCM_TRIGGER_RESUME:
 644                 dev_dbg(rtd->dev, "sst: in pause release\n");
 645                 status = SST_PLATFORM_RUNNING;
 646                 ret_val = stream->ops->stream_pause_release(sst->dev, str_id);
 647                 break;
 648         default:
 649                 return -EINVAL;
 650         }
 651
 652         if (!ret_val)
 653                 sst_set_stream_status(stream, status);
 654
 655         return ret_val;
 656 }
 657
 658
 659 static snd_pcm_uframes_t sst_platform_pcm_pointer
 660                         (struct snd_pcm_substream *substream)
 661 {
 662         struct sst_runtime_stream *stream;
 663         int ret_val, status;
 664         struct pcm_stream_info *str_info;
 665         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 666
 667         stream = substream->runtime->private_data;
 668         status = sst_get_stream_status(stream);
 669         if (status == SST_PLATFORM_INIT)
 670                 return 0;
 671         str_info = &stream->stream_info;
 672         ret_val = stream->ops->stream_read_tstamp(sst->dev, str_info);
 673         if (ret_val) {
 674                 dev_err(rtd->dev, "sst: error code = %d\n", ret_val);
 675                 return ret_val;
 676         }
 677         substream->runtime->delay = str_info->pcm_delay;
 678         return str_info->buffer_ptr;
 679 }
 680
 681 static struct snd_pcm_ops sst_platform_ops = {
 682         .open = sst_platform_open,
 683         .ioctl = snd_pcm_lib_ioctl,
 684         .trigger = sst_platform_pcm_trigger,
 685         .pointer = sst_platform_pcm_pointer,
 686 };
 687
 688 static int sst_pcm_new(struct snd_soc_pcm_runtime *rtd)
 689 {
 690         struct snd_soc_dai *dai = rtd->cpu_dai;
 691         struct snd_pcm *pcm = rtd->pcm;
 692         int retval = 0;
 693
 694         if (dai->driver->playback.channels_min ||
 695                         dai->driver->capture.channels_min) {
 696                 retval =  snd_pcm_lib_preallocate_pages_for_all(pcm,
 697                         SNDRV_DMA_TYPE_CONTINUOUS,
 698                         snd_dma_continuous_data(GFP_DMA),
 699                         SST_MIN_BUFFER, SST_MAX_BUFFER);
 700                 if (retval) {
 701                         dev_err(rtd->dev, "dma buffer allocationf fail\n");
 702                         return retval;
 703                 }
 704         }
 705         return retval;
 706 }
 707
 708 static int sst_soc_probe(struct snd_soc_platform *platform)
 709 {
 710         struct sst_data *drv = dev_get_drvdata(platform->dev);
 711
 712         drv->soc_card = platform->component.card;
 713         return sst_dsp_init_v2_dpcm(platform);
 714 }
 715
 716 static struct snd_soc_platform_driver sst_soc_platform_drv  = {
 717         .probe          = sst_soc_probe,
 718         .ops            = &sst_platform_ops,
 719         .compr_ops      = &sst_platform_compr_ops,
 720         .pcm_new        = sst_pcm_new,
 721 };
 722
 723 static const struct snd_soc_component_driver sst_component = {
 724         .name           = "sst",
 725 };
 726
 727
 728 static int sst_platform_probe(struct platform_device *pdev)
 729 {
 730         struct sst_data *drv;
 731         int ret;
 732         struct sst_platform_data *pdata;
 733
 734         drv = devm_kzalloc(&pdev->dev, sizeof(*drv), GFP_KERNEL);
 735         if (drv == NULL) {
 736                 return -ENOMEM;
 737         }
 738
 739         pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
 740         if (pdata == NULL) {
 741                 return -ENOMEM;
 742         }
 743
 744         pdata->pdev_strm_map = dpcm_strm_map;
 745         pdata->strm_map_size = ARRAY_SIZE(dpcm_strm_map);
 746         drv->pdata = pdata;
 747         drv->pdev = pdev;
 748         mutex_init(&drv->lock);
 749         dev_set_drvdata(&pdev->dev, drv);
 750
 751         ret = snd_soc_register_platform(&pdev->dev, &sst_soc_platform_drv);
 752         if (ret) {
 753                 dev_err(&pdev->dev, "registering soc platform failed\n");
 754                 return ret;
 755         }
 756
 757         ret = snd_soc_register_component(&pdev->dev, &sst_component,
 758                                 sst_platform_dai, ARRAY_SIZE(sst_platform_dai));
 759         if (ret) {
 760                 dev_err(&pdev->dev, "registering cpu dais failed\n");
 761                 snd_soc_unregister_platform(&pdev->dev);
 762         }
 763         return ret;
 764 }
 765
 766 static int sst_platform_remove(struct platform_device *pdev)
 767 {
 768
 769         snd_soc_unregister_component(&pdev->dev);
 770         snd_soc_unregister_platform(&pdev->dev);
 771         dev_dbg(&pdev->dev, "sst_platform_remove success\n");
 772         return 0;
 773 }
 774
 775 #ifdef CONFIG_PM_SLEEP
 776
 777 static int sst_soc_prepare(struct device *dev)
 778 {
 779         struct sst_data *drv = dev_get_drvdata(dev);
 780         int i;
 781
 782         /* suspend all pcms first */
 783         snd_soc_suspend(drv->soc_card->dev);
 784         snd_soc_poweroff(drv->soc_card->dev);
 785
 786         /* set the SSPs to idle */
 787         for (i = 0; i < drv->soc_card->num_rtd; i++) {
 788                 struct snd_soc_dai *dai = drv->soc_card->rtd[i].cpu_dai;
 789
 790                 if (dai->active) {
 791                         send_ssp_cmd(dai, dai->name, 0);
 792                         sst_handle_vb_timer(dai, false);
 793                 }
 794         }
 795
 796         return 0;
 797 }
 798
 799 static void sst_soc_complete(struct device *dev)
 800 {
 801         struct sst_data *drv = dev_get_drvdata(dev);
 802         int i;
 803
 804         /* restart SSPs */
 805         for (i = 0; i < drv->soc_card->num_rtd; i++) {
 806                 struct snd_soc_dai *dai = drv->soc_card->rtd[i].cpu_dai;
 807
 808                 if (dai->active) {
 809                         sst_handle_vb_timer(dai, true);
 810                         send_ssp_cmd(dai, dai->name, 1);
 811                 }
 812         }
 813         snd_soc_resume(drv->soc_card->dev);
 814 }
 815
 816 #else
 817
 818 #define sst_soc_prepare NULL
 819 #define sst_soc_complete NULL
 820
 821 #endif
 822
 823
 824 static const struct dev_pm_ops sst_platform_pm = {
 825         .prepare        = sst_soc_prepare,
 826         .complete       = sst_soc_complete,
 827 };
 828
 829 static struct platform_driver sst_platform_driver = {
 830         .driver         = {
 831                 .name           = "sst-mfld-platform",
 832                 .pm             = &sst_platform_pm,
 833         },
 834         .probe          = sst_platform_probe,
 835         .remove         = sst_platform_remove,
 836 };
 837
 838 module_platform_driver(sst_platform_driver);
 839
 840 MODULE_DESCRIPTION("ASoC Intel(R) MID Platform driver");
 841 MODULE_AUTHOR("Vinod Koul <vinod.koul@intel.com>");
 842 MODULE_AUTHOR("Harsha Priya <priya.harsha@intel.com>");
 843 MODULE_LICENSE("GPL v2");
 844 MODULE_ALIAS("platform:sst-mfld-platform");