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->runtime->dma_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         str_params.sparams = param;
 244         str_params.aparams = alloc_params;
 245         str_params.codec = SST_CODEC_TYPE_PCM;
 246
 247         /* fill the device type and stream id to pass to SST driver */
 248         ret_val = sst_fill_stream_params(substream, ctx, &str_params, false);
 249         if (ret_val < 0)
 250                 return ret_val;
 251
 252         stream->stream_info.str_id = str_params.stream_id;
 253
 254         ret_val = stream->ops->open(sst->dev, &str_params);
 255         if (ret_val <= 0)
 256                 return ret_val;
 257
 258
 259         return ret_val;
 260 }
 261
 262 static void sst_period_elapsed(void *arg)
 263 {
 264         struct snd_pcm_substream *substream = arg;
 265         struct sst_runtime_stream *stream;
 266         int status;
 267
 268         if (!substream || !substream->runtime)
 269                 return;
 270         stream = substream->runtime->private_data;
 271         if (!stream)
 272                 return;
 273         status = sst_get_stream_status(stream);
 274         if (status != SST_PLATFORM_RUNNING)
 275                 return;
 276         snd_pcm_period_elapsed(substream);
 277 }
 278
 279 static int sst_platform_init_stream(struct snd_pcm_substream *substream)
 280 {
 281         struct sst_runtime_stream *stream =
 282                         substream->runtime->private_data;
 283         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 284         int ret_val;
 285
 286         dev_dbg(rtd->dev, "setting buffer ptr param\n");
 287         sst_set_stream_status(stream, SST_PLATFORM_INIT);
 288         stream->stream_info.period_elapsed = sst_period_elapsed;
 289         stream->stream_info.arg = substream;
 290         stream->stream_info.buffer_ptr = 0;
 291         stream->stream_info.sfreq = substream->runtime->rate;
 292         ret_val = stream->ops->stream_init(sst->dev, &stream->stream_info);
 293         if (ret_val)
 294                 dev_err(rtd->dev, "control_set ret error %d\n", ret_val);
 295         return ret_val;
 296
 297 }
 298
 299 static int power_up_sst(struct sst_runtime_stream *stream)
 300 {
 301         return stream->ops->power(sst->dev, true);
 302 }
 303
 304 static void power_down_sst(struct sst_runtime_stream *stream)
 305 {
 306         stream->ops->power(sst->dev, false);
 307 }
 308
 309 static int sst_media_open(struct snd_pcm_substream *substream,
 310                 struct snd_soc_dai *dai)
 311 {
 312         int ret_val = 0;
 313         struct snd_pcm_runtime *runtime = substream->runtime;
 314         struct sst_runtime_stream *stream;
 315
 316         stream = kzalloc(sizeof(*stream), GFP_KERNEL);
 317         if (!stream)
 318                 return -ENOMEM;
 319         spin_lock_init(&stream->status_lock);
 320
 321         /* get the sst ops */
 322         mutex_lock(&sst_lock);
 323         if (!sst ||
 324             !try_module_get(sst->dev->driver->owner)) {
 325                 dev_err(dai->dev, "no device available to run\n");
 326                 ret_val = -ENODEV;
 327                 goto out_ops;
 328         }
 329         stream->ops = sst->ops;
 330         mutex_unlock(&sst_lock);
 331
 332         stream->stream_info.str_id = 0;
 333
 334         stream->stream_info.arg = substream;
 335         /* allocate memory for SST API set */
 336         runtime->private_data = stream;
 337
 338         ret_val = power_up_sst(stream);
 339         if (ret_val < 0)
 340                 goto out_power_up;
 341
 342         /* Make sure, that the period size is always even */
 343         snd_pcm_hw_constraint_step(substream->runtime, 0,
 344                            SNDRV_PCM_HW_PARAM_PERIODS, 2);
 345
 346         return snd_pcm_hw_constraint_integer(runtime,
 347                          SNDRV_PCM_HW_PARAM_PERIODS);
 348 out_ops:
 349         mutex_unlock(&sst_lock);
 350 out_power_up:
 351         kfree(stream);
 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 int sst_media_prepare(struct snd_pcm_substream *substream,
 372                 struct snd_soc_dai *dai)
 373 {
 374         struct sst_runtime_stream *stream;
 375         int ret_val = 0, str_id;
 376
 377         stream = substream->runtime->private_data;
 378         str_id = stream->stream_info.str_id;
 379         if (stream->stream_info.str_id) {
 380                 ret_val = stream->ops->stream_drop(sst->dev, str_id);
 381                 return ret_val;
 382         }
 383
 384         ret_val = sst_platform_alloc_stream(substream, dai);
 385         if (ret_val <= 0)
 386                 return ret_val;
 387         snprintf(substream->pcm->id, sizeof(substream->pcm->id),
 388                         "%d", stream->stream_info.str_id);
 389
 390         ret_val = sst_platform_init_stream(substream);
 391         if (ret_val)
 392                 return ret_val;
 393         substream->runtime->hw.info = SNDRV_PCM_INFO_BLOCK_TRANSFER;
 394         return ret_val;
 395 }
 396
 397 static int sst_media_hw_params(struct snd_pcm_substream *substream,
 398                                 struct snd_pcm_hw_params *params,
 399                                 struct snd_soc_dai *dai)
 400 {
 401         int ret;
 402
 403         ret =
 404                 snd_pcm_lib_malloc_pages(substream,
 405                                 params_buffer_bytes(params));
 406         if (ret)
 407                 return ret;
 408         memset(substream->runtime->dma_area, 0, params_buffer_bytes(params));
 409         return 0;
 410 }
 411
 412 static int sst_media_hw_free(struct snd_pcm_substream *substream,
 413                 struct snd_soc_dai *dai)
 414 {
 415         return snd_pcm_lib_free_pages(substream);
 416 }
 417
 418 static int sst_enable_ssp(struct snd_pcm_substream *substream,
 419                         struct snd_soc_dai *dai)
 420 {
 421         int ret = 0;
 422
 423         if (!dai->active) {
 424                 ret = sst_handle_vb_timer(dai, true);
 425                 sst_fill_ssp_defaults(dai);
 426         }
 427         return ret;
 428 }
 429
 430 static int sst_be_hw_params(struct snd_pcm_substream *substream,
 431                                 struct snd_pcm_hw_params *params,
 432                                 struct snd_soc_dai *dai)
 433 {
 434         int ret = 0;
 435
 436         if (dai->active == 1)
 437                 ret = send_ssp_cmd(dai, dai->name, 1);
 438         return ret;
 439 }
 440
 441 static int sst_set_format(struct snd_soc_dai *dai, unsigned int fmt)
 442 {
 443         int ret = 0;
 444
 445         if (!dai->active)
 446                 return 0;
 447
 448         ret = sst_fill_ssp_config(dai, fmt);
 449         if (ret < 0)
 450                 dev_err(dai->dev, "sst_set_format failed..\n");
 451
 452         return ret;
 453 }
 454
 455 static int sst_platform_set_ssp_slot(struct snd_soc_dai *dai,
 456                         unsigned int tx_mask, unsigned int rx_mask,
 457                         int slots, int slot_width) {
 458         int ret = 0;
 459
 460         if (!dai->active)
 461                 return ret;
 462
 463         ret = sst_fill_ssp_slot(dai, tx_mask, rx_mask, slots, slot_width);
 464         if (ret < 0)
 465                 dev_err(dai->dev, "sst_fill_ssp_slot failed..%d\n", ret);
 466
 467         return ret;
 468 }
 469
 470 static void sst_disable_ssp(struct snd_pcm_substream *substream,
 471                         struct snd_soc_dai *dai)
 472 {
 473         if (!dai->active) {
 474                 send_ssp_cmd(dai, dai->name, 0);
 475                 sst_handle_vb_timer(dai, false);
 476         }
 477 }
 478
 479 static struct snd_soc_dai_ops sst_media_dai_ops = {
 480         .startup = sst_media_open,
 481         .shutdown = sst_media_close,
 482         .prepare = sst_media_prepare,
 483         .hw_params = sst_media_hw_params,
 484         .hw_free = sst_media_hw_free,
 485         .mute_stream = sst_media_digital_mute,
 486 };
 487
 488 static struct snd_soc_dai_ops sst_compr_dai_ops = {
 489         .mute_stream = sst_media_digital_mute,
 490 };
 491
 492 static struct snd_soc_dai_ops sst_be_dai_ops = {
 493         .startup = sst_enable_ssp,
 494         .hw_params = sst_be_hw_params,
 495         .set_fmt = sst_set_format,
 496         .set_tdm_slot = sst_platform_set_ssp_slot,
 497         .shutdown = sst_disable_ssp,
 498 };
 499
 500 static struct snd_soc_dai_driver sst_platform_dai[] = {
 501 {
 502         .name = "media-cpu-dai",
 503         .ops = &sst_media_dai_ops,
 504         .playback = {
 505                 .stream_name = "Headset Playback",
 506                 .channels_min = SST_STEREO,
 507                 .channels_max = SST_STEREO,
 508                 .rates = SNDRV_PCM_RATE_44100|SNDRV_PCM_RATE_48000,
 509                 .formats = SNDRV_PCM_FMTBIT_S16_LE,
 510         },
 511         .capture = {
 512                 .stream_name = "Headset Capture",
 513                 .channels_min = 1,
 514                 .channels_max = 2,
 515                 .rates = SNDRV_PCM_RATE_44100|SNDRV_PCM_RATE_48000,
 516                 .formats = SNDRV_PCM_FMTBIT_S16_LE,
 517         },
 518 },
 519 {
 520         .name = "compress-cpu-dai",
 521         .compress_new = snd_soc_new_compress,
 522         .ops = &sst_compr_dai_ops,
 523         .playback = {
 524                 .stream_name = "Compress Playback",
 525                 .channels_min = SST_STEREO,
 526                 .channels_max = SST_STEREO,
 527                 .rates = SNDRV_PCM_RATE_48000,
 528                 .formats = SNDRV_PCM_FMTBIT_S16_LE,
 529         },
 530 },
 531 /* BE CPU  Dais */
 532 {
 533         .name = "ssp0-port",
 534         .ops = &sst_be_dai_ops,
 535         .playback = {
 536                 .stream_name = "ssp0 Tx",
 537                 .channels_min = SST_STEREO,
 538                 .channels_max = SST_STEREO,
 539                 .rates = SNDRV_PCM_RATE_48000,
 540                 .formats = SNDRV_PCM_FMTBIT_S16_LE,
 541         },
 542         .capture = {
 543                 .stream_name = "ssp0 Rx",
 544                 .channels_min = SST_STEREO,
 545                 .channels_max = SST_STEREO,
 546                 .rates = SNDRV_PCM_RATE_48000,
 547                 .formats = SNDRV_PCM_FMTBIT_S16_LE,
 548         },
 549 },
 550 {
 551         .name = "ssp1-port",
 552         .ops = &sst_be_dai_ops,
 553         .playback = {
 554                 .stream_name = "ssp1 Tx",
 555                 .channels_min = SST_STEREO,
 556                 .channels_max = SST_STEREO,
 557                 .rates = SNDRV_PCM_RATE_8000|SNDRV_PCM_RATE_16000|SNDRV_PCM_RATE_48000,
 558                 .formats = SNDRV_PCM_FMTBIT_S16_LE,
 559         },
 560         .capture = {
 561                 .stream_name = "ssp1 Rx",
 562                 .channels_min = SST_STEREO,
 563                 .channels_max = SST_STEREO,
 564                 .rates = SNDRV_PCM_RATE_8000|SNDRV_PCM_RATE_16000|SNDRV_PCM_RATE_48000,
 565                 .formats = SNDRV_PCM_FMTBIT_S16_LE,
 566         },
 567 },
 568 {
 569         .name = "ssp2-port",
 570         .ops = &sst_be_dai_ops,
 571         .playback = {
 572                 .stream_name = "ssp2 Tx",
 573                 .channels_min = SST_STEREO,
 574                 .channels_max = SST_STEREO,
 575                 .rates = SNDRV_PCM_RATE_48000,
 576                 .formats = SNDRV_PCM_FMTBIT_S16_LE,
 577         },
 578         .capture = {
 579                 .stream_name = "ssp2 Rx",
 580                 .channels_min = SST_STEREO,
 581                 .channels_max = SST_STEREO,
 582                 .rates = SNDRV_PCM_RATE_48000,
 583                 .formats = SNDRV_PCM_FMTBIT_S16_LE,
 584         },
 585 },
 586 };
 587
 588 static int sst_platform_open(struct snd_pcm_substream *substream)
 589 {
 590         struct snd_pcm_runtime *runtime;
 591
 592         if (substream->pcm->internal)
 593                 return 0;
 594
 595         runtime = substream->runtime;
 596         runtime->hw = sst_platform_pcm_hw;
 597         return 0;
 598 }
 599
 600 static int sst_platform_pcm_trigger(struct snd_pcm_substream *substream,
 601                                         int cmd)
 602 {
 603         int ret_val = 0, str_id;
 604         struct sst_runtime_stream *stream;
 605         int status;
 606         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 607
 608         dev_dbg(rtd->dev, "sst_platform_pcm_trigger called\n");
 609         if (substream->pcm->internal)
 610                 return 0;
 611         stream = substream->runtime->private_data;
 612         str_id = stream->stream_info.str_id;
 613         switch (cmd) {
 614         case SNDRV_PCM_TRIGGER_START:
 615                 dev_dbg(rtd->dev, "sst: Trigger Start\n");
 616                 status = SST_PLATFORM_RUNNING;
 617                 stream->stream_info.arg = substream;
 618                 ret_val = stream->ops->stream_start(sst->dev, str_id);
 619                 break;
 620         case SNDRV_PCM_TRIGGER_STOP:
 621                 dev_dbg(rtd->dev, "sst: in stop\n");
 622                 status = SST_PLATFORM_DROPPED;
 623                 ret_val = stream->ops->stream_drop(sst->dev, str_id);
 624                 break;
 625         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
 626         case SNDRV_PCM_TRIGGER_SUSPEND:
 627                 dev_dbg(rtd->dev, "sst: in pause\n");
 628                 status = SST_PLATFORM_PAUSED;
 629                 ret_val = stream->ops->stream_pause(sst->dev, str_id);
 630                 break;
 631         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
 632         case SNDRV_PCM_TRIGGER_RESUME:
 633                 dev_dbg(rtd->dev, "sst: in pause release\n");
 634                 status = SST_PLATFORM_RUNNING;
 635                 ret_val = stream->ops->stream_pause_release(sst->dev, str_id);
 636                 break;
 637         default:
 638                 return -EINVAL;
 639         }
 640
 641         if (!ret_val)
 642                 sst_set_stream_status(stream, status);
 643
 644         return ret_val;
 645 }
 646
 647
 648 static snd_pcm_uframes_t sst_platform_pcm_pointer
 649                         (struct snd_pcm_substream *substream)
 650 {
 651         struct sst_runtime_stream *stream;
 652         int ret_val, status;
 653         struct pcm_stream_info *str_info;
 654         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 655
 656         stream = substream->runtime->private_data;
 657         status = sst_get_stream_status(stream);
 658         if (status == SST_PLATFORM_INIT)
 659                 return 0;
 660         str_info = &stream->stream_info;
 661         ret_val = stream->ops->stream_read_tstamp(sst->dev, str_info);
 662         if (ret_val) {
 663                 dev_err(rtd->dev, "sst: error code = %d\n", ret_val);
 664                 return ret_val;
 665         }
 666         substream->runtime->delay = str_info->pcm_delay;
 667         return str_info->buffer_ptr;
 668 }
 669
 670 static struct snd_pcm_ops sst_platform_ops = {
 671         .open = sst_platform_open,
 672         .ioctl = snd_pcm_lib_ioctl,
 673         .trigger = sst_platform_pcm_trigger,
 674         .pointer = sst_platform_pcm_pointer,
 675 };
 676
 677 static int sst_pcm_new(struct snd_soc_pcm_runtime *rtd)
 678 {
 679         struct snd_soc_dai *dai = rtd->cpu_dai;
 680         struct snd_pcm *pcm = rtd->pcm;
 681         int retval = 0;
 682
 683         if (dai->driver->playback.channels_min ||
 684                         dai->driver->capture.channels_min) {
 685                 retval =  snd_pcm_lib_preallocate_pages_for_all(pcm,
 686                         SNDRV_DMA_TYPE_CONTINUOUS,
 687                         snd_dma_continuous_data(GFP_DMA),
 688                         SST_MIN_BUFFER, SST_MAX_BUFFER);
 689                 if (retval) {
 690                         dev_err(rtd->dev, "dma buffer allocationf fail\n");
 691                         return retval;
 692                 }
 693         }
 694         return retval;
 695 }
 696
 697 static int sst_soc_probe(struct snd_soc_platform *platform)
 698 {
 699         struct sst_data *drv = dev_get_drvdata(platform->dev);
 700
 701         drv->soc_card = platform->component.card;
 702         return sst_dsp_init_v2_dpcm(platform);
 703 }
 704
 705 static struct snd_soc_platform_driver sst_soc_platform_drv  = {
 706         .probe          = sst_soc_probe,
 707         .ops            = &sst_platform_ops,
 708         .compr_ops      = &sst_platform_compr_ops,
 709         .pcm_new        = sst_pcm_new,
 710 };
 711
 712 static const struct snd_soc_component_driver sst_component = {
 713         .name           = "sst",
 714 };
 715
 716
 717 static int sst_platform_probe(struct platform_device *pdev)
 718 {
 719         struct sst_data *drv;
 720         int ret;
 721         struct sst_platform_data *pdata;
 722
 723         drv = devm_kzalloc(&pdev->dev, sizeof(*drv), GFP_KERNEL);
 724         if (drv == NULL) {
 725                 return -ENOMEM;
 726         }
 727
 728         pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
 729         if (pdata == NULL) {
 730                 return -ENOMEM;
 731         }
 732
 733         pdata->pdev_strm_map = dpcm_strm_map;
 734         pdata->strm_map_size = ARRAY_SIZE(dpcm_strm_map);
 735         drv->pdata = pdata;
 736         drv->pdev = pdev;
 737         mutex_init(&drv->lock);
 738         dev_set_drvdata(&pdev->dev, drv);
 739
 740         ret = snd_soc_register_platform(&pdev->dev, &sst_soc_platform_drv);
 741         if (ret) {
 742                 dev_err(&pdev->dev, "registering soc platform failed\n");
 743                 return ret;
 744         }
 745
 746         ret = snd_soc_register_component(&pdev->dev, &sst_component,
 747                                 sst_platform_dai, ARRAY_SIZE(sst_platform_dai));
 748         if (ret) {
 749                 dev_err(&pdev->dev, "registering cpu dais failed\n");
 750                 snd_soc_unregister_platform(&pdev->dev);
 751         }
 752         return ret;
 753 }
 754
 755 static int sst_platform_remove(struct platform_device *pdev)
 756 {
 757
 758         snd_soc_unregister_component(&pdev->dev);
 759         snd_soc_unregister_platform(&pdev->dev);
 760         dev_dbg(&pdev->dev, "sst_platform_remove success\n");
 761         return 0;
 762 }
 763
 764 #ifdef CONFIG_PM_SLEEP
 765
 766 static int sst_soc_prepare(struct device *dev)
 767 {
 768         struct sst_data *drv = dev_get_drvdata(dev);
 769         int i;
 770
 771         if (!drv->soc_card)
 772                 return 0;
 773
 774         /* suspend all pcms first */
 775         snd_soc_suspend(drv->soc_card->dev);
 776         snd_soc_poweroff(drv->soc_card->dev);
 777
 778         /* set the SSPs to idle */
 779         for (i = 0; i < drv->soc_card->num_rtd; i++) {
 780                 struct snd_soc_dai *dai = drv->soc_card->rtd[i].cpu_dai;
 781
 782                 if (dai->active) {
 783                         send_ssp_cmd(dai, dai->name, 0);
 784                         sst_handle_vb_timer(dai, false);
 785                 }
 786         }
 787
 788         return 0;
 789 }
 790
 791 static void sst_soc_complete(struct device *dev)
 792 {
 793         struct sst_data *drv = dev_get_drvdata(dev);
 794         int i;
 795
 796         if (!drv->soc_card)
 797                 return;
 798
 799         /* restart SSPs */
 800         for (i = 0; i < drv->soc_card->num_rtd; i++) {
 801                 struct snd_soc_dai *dai = drv->soc_card->rtd[i].cpu_dai;
 802
 803                 if (dai->active) {
 804                         sst_handle_vb_timer(dai, true);
 805                         send_ssp_cmd(dai, dai->name, 1);
 806                 }
 807         }
 808         snd_soc_resume(drv->soc_card->dev);
 809 }
 810
 811 #else
 812
 813 #define sst_soc_prepare NULL
 814 #define sst_soc_complete NULL
 815
 816 #endif
 817
 818
 819 static const struct dev_pm_ops sst_platform_pm = {
 820         .prepare        = sst_soc_prepare,
 821         .complete       = sst_soc_complete,
 822 };
 823
 824 static struct platform_driver sst_platform_driver = {
 825         .driver         = {
 826                 .name           = "sst-mfld-platform",
 827                 .pm             = &sst_platform_pm,
 828         },
 829         .probe          = sst_platform_probe,
 830         .remove         = sst_platform_remove,
 831 };
 832
 833 module_platform_driver(sst_platform_driver);
 834
 835 MODULE_DESCRIPTION("ASoC Intel(R) MID Platform driver");
 836 MODULE_AUTHOR("Vinod Koul <vinod.koul@intel.com>");
 837 MODULE_AUTHOR("Harsha Priya <priya.harsha@intel.com>");
 838 MODULE_LICENSE("GPL v2");
 839 MODULE_ALIAS("platform:sst-mfld-platform");