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

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DEFINITIONS

This source file includes following definitions.
  1. sst_register_dsp
  2. sst_unregister_dsp
  3. sst_media_digital_mute
  4. sst_set_stream_status
  5. sst_get_stream_status
  6. sst_fill_alloc_params
  7. sst_fill_pcm_params
  8. sst_get_stream_mapping
  9. sst_fill_stream_params
  10. sst_platform_alloc_stream
  11. sst_period_elapsed
  12. sst_platform_init_stream
  13. power_up_sst
  14. power_down_sst
  15. sst_media_open
  16. sst_media_close
  17. sst_media_prepare
  18. sst_media_hw_params
  19. sst_media_hw_free
  20. sst_enable_ssp
  21. sst_be_hw_params
  22. sst_set_format
  23. sst_platform_set_ssp_slot
  24. sst_disable_ssp
  25. sst_platform_open
  26. sst_platform_pcm_trigger
  27. sst_pcm_new
  28. sst_soc_probe
  29. sst_soc_remove
  30. sst_platform_probe
  31. sst_platform_remove
  32. sst_soc_prepare
  33. sst_soc_complete

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  *  sst_mfld_platform.c - Intel MID Platform driver
   4  *
   5  *  Copyright (C) 2010-2014 Intel Corp
   6  *  Author: Vinod Koul <vinod.koul@intel.com>
   7  *  Author: Harsha Priya <priya.harsha@intel.com>
   8  *  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   9  *
  10  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  11  */
  12 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  13 
  14 #include <linux/slab.h>
  15 #include <linux/io.h>
  16 #include <linux/module.h>
  17 #include <sound/core.h>
  18 #include <sound/pcm.h>
  19 #include <sound/pcm_params.h>
  20 #include <sound/soc.h>
  21 #include <sound/compress_driver.h>
  22 #include <asm/platform_sst_audio.h>
  23 #include "sst-mfld-platform.h"
  24 #include "sst-atom-controls.h"
  25 
  26 struct sst_device *sst;
  27 static DEFINE_MUTEX(sst_lock);
  28 
  29 int sst_register_dsp(struct sst_device *dev)
  30 {
  31         if (WARN_ON(!dev))
  32                 return -EINVAL;
  33         if (!try_module_get(dev->dev->driver->owner))
  34                 return -ENODEV;
  35         mutex_lock(&sst_lock);
  36         if (sst) {
  37                 dev_err(dev->dev, "we already have a device %s\n", sst->name);
  38                 module_put(dev->dev->driver->owner);
  39                 mutex_unlock(&sst_lock);
  40                 return -EEXIST;
  41         }
  42         dev_dbg(dev->dev, "registering device %s\n", dev->name);
  43         sst = dev;
  44         mutex_unlock(&sst_lock);
  45         return 0;
  46 }
  47 EXPORT_SYMBOL_GPL(sst_register_dsp);
  48 
  49 int sst_unregister_dsp(struct sst_device *dev)
  50 {
  51         if (WARN_ON(!dev))
  52                 return -EINVAL;
  53         if (dev != sst)
  54                 return -EINVAL;
  55 
  56         mutex_lock(&sst_lock);
  57 
  58         if (!sst) {
  59                 mutex_unlock(&sst_lock);
  60                 return -EIO;
  61         }
  62 
  63         module_put(sst->dev->driver->owner);
  64         dev_dbg(dev->dev, "unreg %s\n", sst->name);
  65         sst = NULL;
  66         mutex_unlock(&sst_lock);
  67         return 0;
  68 }
  69 EXPORT_SYMBOL_GPL(sst_unregister_dsp);
  70 
  71 static const struct snd_pcm_hardware sst_platform_pcm_hw = {
  72         .info = (SNDRV_PCM_INFO_INTERLEAVED |
  73                         SNDRV_PCM_INFO_DOUBLE |
  74                         SNDRV_PCM_INFO_PAUSE |
  75                         SNDRV_PCM_INFO_RESUME |
  76                         SNDRV_PCM_INFO_MMAP|
  77                         SNDRV_PCM_INFO_MMAP_VALID |
  78                         SNDRV_PCM_INFO_BLOCK_TRANSFER |
  79                         SNDRV_PCM_INFO_SYNC_START),
  80         .buffer_bytes_max = SST_MAX_BUFFER,
  81         .period_bytes_min = SST_MIN_PERIOD_BYTES,
  82         .period_bytes_max = SST_MAX_PERIOD_BYTES,
  83         .periods_min = SST_MIN_PERIODS,
  84         .periods_max = SST_MAX_PERIODS,
  85         .fifo_size = SST_FIFO_SIZE,
  86 };
  87 
  88 static struct sst_dev_stream_map dpcm_strm_map[] = {
  89         {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF}, /* Reserved, not in use */
  90         {MERR_DPCM_AUDIO, 0, SNDRV_PCM_STREAM_PLAYBACK, PIPE_MEDIA1_IN, SST_TASK_ID_MEDIA, 0},
  91         {MERR_DPCM_COMPR, 0, SNDRV_PCM_STREAM_PLAYBACK, PIPE_MEDIA0_IN, SST_TASK_ID_MEDIA, 0},
  92         {MERR_DPCM_AUDIO, 0, SNDRV_PCM_STREAM_CAPTURE, PIPE_PCM1_OUT, SST_TASK_ID_MEDIA, 0},
  93         {MERR_DPCM_DEEP_BUFFER, 0, SNDRV_PCM_STREAM_PLAYBACK, PIPE_MEDIA3_IN, SST_TASK_ID_MEDIA, 0},
  94 };
  95 
  96 static int sst_media_digital_mute(struct snd_soc_dai *dai, int mute, int stream)
  97 {
  98 
  99         return sst_send_pipe_gains(dai, stream, mute);
 100 }
 101 
 102 /* helper functions */
 103 void sst_set_stream_status(struct sst_runtime_stream *stream,
 104                                         int state)
 105 {
 106         unsigned long flags;
 107         spin_lock_irqsave(&stream->status_lock, flags);
 108         stream->stream_status = state;
 109         spin_unlock_irqrestore(&stream->status_lock, flags);
 110 }
 111 
 112 static inline int sst_get_stream_status(struct sst_runtime_stream *stream)
 113 {
 114         int state;
 115         unsigned long flags;
 116 
 117         spin_lock_irqsave(&stream->status_lock, flags);
 118         state = stream->stream_status;
 119         spin_unlock_irqrestore(&stream->status_lock, flags);
 120         return state;
 121 }
 122 
 123 static void sst_fill_alloc_params(struct snd_pcm_substream *substream,
 124                                 struct snd_sst_alloc_params_ext *alloc_param)
 125 {
 126         unsigned int channels;
 127         snd_pcm_uframes_t period_size;
 128         ssize_t periodbytes;
 129         ssize_t buffer_bytes = snd_pcm_lib_buffer_bytes(substream);
 130         u32 buffer_addr = virt_to_phys(substream->dma_buffer.area);
 131 
 132         channels = substream->runtime->channels;
 133         period_size = substream->runtime->period_size;
 134         periodbytes = samples_to_bytes(substream->runtime, period_size);
 135         alloc_param->ring_buf_info[0].addr = buffer_addr;
 136         alloc_param->ring_buf_info[0].size = buffer_bytes;
 137         alloc_param->sg_count = 1;
 138         alloc_param->reserved = 0;
 139         alloc_param->frag_size = periodbytes * channels;
 140 
 141 }
 142 static void sst_fill_pcm_params(struct snd_pcm_substream *substream,
 143                                 struct snd_sst_stream_params *param)
 144 {
 145         param->uc.pcm_params.num_chan = (u8) substream->runtime->channels;
 146         param->uc.pcm_params.pcm_wd_sz = substream->runtime->sample_bits;
 147         param->uc.pcm_params.sfreq = substream->runtime->rate;
 148 
 149         /* PCM stream via ALSA interface */
 150         param->uc.pcm_params.use_offload_path = 0;
 151         param->uc.pcm_params.reserved2 = 0;
 152         memset(param->uc.pcm_params.channel_map, 0, sizeof(u8));
 153 
 154 }
 155 
 156 static int sst_get_stream_mapping(int dev, int sdev, int dir,
 157         struct sst_dev_stream_map *map, int size)
 158 {
 159         int i;
 160 
 161         if (map == NULL)
 162                 return -EINVAL;
 163 
 164 
 165         /* index 0 is not used in stream map */
 166         for (i = 1; i < size; i++) {
 167                 if ((map[i].dev_num == dev) && (map[i].direction == dir))
 168                         return i;
 169         }
 170         return 0;
 171 }
 172 
 173 int sst_fill_stream_params(void *substream,
 174         const struct sst_data *ctx, struct snd_sst_params *str_params, bool is_compress)
 175 {
 176         int map_size;
 177         int index;
 178         struct sst_dev_stream_map *map;
 179         struct snd_pcm_substream *pstream = NULL;
 180         struct snd_compr_stream *cstream = NULL;
 181 
 182         map = ctx->pdata->pdev_strm_map;
 183         map_size = ctx->pdata->strm_map_size;
 184 
 185         if (is_compress)
 186                 cstream = (struct snd_compr_stream *)substream;
 187         else
 188                 pstream = (struct snd_pcm_substream *)substream;
 189 
 190         str_params->stream_type = SST_STREAM_TYPE_MUSIC;
 191 
 192         /* For pcm streams */
 193         if (pstream) {
 194                 index = sst_get_stream_mapping(pstream->pcm->device,
 195                                           pstream->number, pstream->stream,
 196                                           map, map_size);
 197                 if (index <= 0)
 198                         return -EINVAL;
 199 
 200                 str_params->stream_id = index;
 201                 str_params->device_type = map[index].device_id;
 202                 str_params->task = map[index].task_id;
 203 
 204                 str_params->ops = (u8)pstream->stream;
 205         }
 206 
 207         if (cstream) {
 208                 index = sst_get_stream_mapping(cstream->device->device,
 209                                                0, cstream->direction,
 210                                                map, map_size);
 211                 if (index <= 0)
 212                         return -EINVAL;
 213                 str_params->stream_id = index;
 214                 str_params->device_type = map[index].device_id;
 215                 str_params->task = map[index].task_id;
 216 
 217                 str_params->ops = (u8)cstream->direction;
 218         }
 219         return 0;
 220 }
 221 
 222 static int sst_platform_alloc_stream(struct snd_pcm_substream *substream,
 223                 struct snd_soc_dai *dai)
 224 {
 225         struct sst_runtime_stream *stream =
 226                         substream->runtime->private_data;
 227         struct snd_sst_stream_params param = {{{0,},},};
 228         struct snd_sst_params str_params = {0};
 229         struct snd_sst_alloc_params_ext alloc_params = {0};
 230         int ret_val = 0;
 231         struct sst_data *ctx = snd_soc_dai_get_drvdata(dai);
 232 
 233         /* set codec params and inform SST driver the same */
 234         sst_fill_pcm_params(substream, &param);
 235         sst_fill_alloc_params(substream, &alloc_params);
 236         substream->runtime->dma_area = substream->dma_buffer.area;
 237         str_params.sparams = param;
 238         str_params.aparams = alloc_params;
 239         str_params.codec = SST_CODEC_TYPE_PCM;
 240 
 241         /* fill the device type and stream id to pass to SST driver */
 242         ret_val = sst_fill_stream_params(substream, ctx, &str_params, false);
 243         if (ret_val < 0)
 244                 return ret_val;
 245 
 246         stream->stream_info.str_id = str_params.stream_id;
 247 
 248         ret_val = stream->ops->open(sst->dev, &str_params);
 249         if (ret_val <= 0)
 250                 return ret_val;
 251 
 252 
 253         return ret_val;
 254 }
 255 
 256 static void sst_period_elapsed(void *arg)
 257 {
 258         struct snd_pcm_substream *substream = arg;
 259         struct sst_runtime_stream *stream;
 260         int status;
 261 
 262         if (!substream || !substream->runtime)
 263                 return;
 264         stream = substream->runtime->private_data;
 265         if (!stream)
 266                 return;
 267         status = sst_get_stream_status(stream);
 268         if (status != SST_PLATFORM_RUNNING)
 269                 return;
 270         snd_pcm_period_elapsed(substream);
 271 }
 272 
 273 static int sst_platform_init_stream(struct snd_pcm_substream *substream)
 274 {
 275         struct sst_runtime_stream *stream =
 276                         substream->runtime->private_data;
 277         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 278         int ret_val;
 279 
 280         dev_dbg(rtd->dev, "setting buffer ptr param\n");
 281         sst_set_stream_status(stream, SST_PLATFORM_INIT);
 282         stream->stream_info.period_elapsed = sst_period_elapsed;
 283         stream->stream_info.arg = substream;
 284         stream->stream_info.buffer_ptr = 0;
 285         stream->stream_info.sfreq = substream->runtime->rate;
 286         ret_val = stream->ops->stream_init(sst->dev, &stream->stream_info);
 287         if (ret_val)
 288                 dev_err(rtd->dev, "control_set ret error %d\n", ret_val);
 289         return ret_val;
 290 
 291 }
 292 
 293 static int power_up_sst(struct sst_runtime_stream *stream)
 294 {
 295         return stream->ops->power(sst->dev, true);
 296 }
 297 
 298 static void power_down_sst(struct sst_runtime_stream *stream)
 299 {
 300         stream->ops->power(sst->dev, false);
 301 }
 302 
 303 static int sst_media_open(struct snd_pcm_substream *substream,
 304                 struct snd_soc_dai *dai)
 305 {
 306         int ret_val = 0;
 307         struct snd_pcm_runtime *runtime = substream->runtime;
 308         struct sst_runtime_stream *stream;
 309 
 310         stream = kzalloc(sizeof(*stream), GFP_KERNEL);
 311         if (!stream)
 312                 return -ENOMEM;
 313         spin_lock_init(&stream->status_lock);
 314 
 315         /* get the sst ops */
 316         mutex_lock(&sst_lock);
 317         if (!sst ||
 318             !try_module_get(sst->dev->driver->owner)) {
 319                 dev_err(dai->dev, "no device available to run\n");
 320                 ret_val = -ENODEV;
 321                 goto out_ops;
 322         }
 323         stream->ops = sst->ops;
 324         mutex_unlock(&sst_lock);
 325 
 326         stream->stream_info.str_id = 0;
 327 
 328         stream->stream_info.arg = substream;
 329         /* allocate memory for SST API set */
 330         runtime->private_data = stream;
 331 
 332         ret_val = power_up_sst(stream);
 333         if (ret_val < 0)
 334                 return ret_val;
 335 
 336         /* Make sure, that the period size is always even */
 337         snd_pcm_hw_constraint_step(substream->runtime, 0,
 338                            SNDRV_PCM_HW_PARAM_PERIODS, 2);
 339 
 340         return snd_pcm_hw_constraint_integer(runtime,
 341                          SNDRV_PCM_HW_PARAM_PERIODS);
 342 out_ops:
 343         kfree(stream);
 344         mutex_unlock(&sst_lock);
 345         return ret_val;
 346 }
 347 
 348 static void sst_media_close(struct snd_pcm_substream *substream,
 349                 struct snd_soc_dai *dai)
 350 {
 351         struct sst_runtime_stream *stream;
 352         int str_id;
 353 
 354         stream = substream->runtime->private_data;
 355         power_down_sst(stream);
 356 
 357         str_id = stream->stream_info.str_id;
 358         if (str_id)
 359                 stream->ops->close(sst->dev, str_id);
 360         module_put(sst->dev->driver->owner);
 361         kfree(stream);
 362 }
 363 
 364 static int sst_media_prepare(struct snd_pcm_substream *substream,
 365                 struct snd_soc_dai *dai)
 366 {
 367         struct sst_runtime_stream *stream;
 368         int ret_val = 0, str_id;
 369 
 370         stream = substream->runtime->private_data;
 371         str_id = stream->stream_info.str_id;
 372         if (stream->stream_info.str_id) {
 373                 ret_val = stream->ops->stream_drop(sst->dev, str_id);
 374                 return ret_val;
 375         }
 376 
 377         ret_val = sst_platform_alloc_stream(substream, dai);
 378         if (ret_val <= 0)
 379                 return ret_val;
 380         snprintf(substream->pcm->id, sizeof(substream->pcm->id),
 381                         "%d", stream->stream_info.str_id);
 382 
 383         ret_val = sst_platform_init_stream(substream);
 384         if (ret_val)
 385                 return ret_val;
 386         substream->runtime->hw.info = SNDRV_PCM_INFO_BLOCK_TRANSFER;
 387         return ret_val;
 388 }
 389 
 390 static int sst_media_hw_params(struct snd_pcm_substream *substream,
 391                                 struct snd_pcm_hw_params *params,
 392                                 struct snd_soc_dai *dai)
 393 {
 394         int ret;
 395 
 396         ret =
 397                 snd_pcm_lib_malloc_pages(substream,
 398                                 params_buffer_bytes(params));
 399         if (ret)
 400                 return ret;
 401         memset(substream->runtime->dma_area, 0, params_buffer_bytes(params));
 402         return 0;
 403 }
 404 
 405 static int sst_media_hw_free(struct snd_pcm_substream *substream,
 406                 struct snd_soc_dai *dai)
 407 {
 408         return snd_pcm_lib_free_pages(substream);
 409 }
 410 
 411 static int sst_enable_ssp(struct snd_pcm_substream *substream,
 412                         struct snd_soc_dai *dai)
 413 {
 414         int ret = 0;
 415 
 416         if (!dai->active) {
 417                 ret = sst_handle_vb_timer(dai, true);
 418                 sst_fill_ssp_defaults(dai);
 419         }
 420         return ret;
 421 }
 422 
 423 static int sst_be_hw_params(struct snd_pcm_substream *substream,
 424                                 struct snd_pcm_hw_params *params,
 425                                 struct snd_soc_dai *dai)
 426 {
 427         int ret = 0;
 428 
 429         if (dai->active == 1)
 430                 ret = send_ssp_cmd(dai, dai->name, 1);
 431         return ret;
 432 }
 433 
 434 static int sst_set_format(struct snd_soc_dai *dai, unsigned int fmt)
 435 {
 436         int ret = 0;
 437 
 438         if (!dai->active)
 439                 return 0;
 440 
 441         ret = sst_fill_ssp_config(dai, fmt);
 442         if (ret < 0)
 443                 dev_err(dai->dev, "sst_set_format failed..\n");
 444 
 445         return ret;
 446 }
 447 
 448 static int sst_platform_set_ssp_slot(struct snd_soc_dai *dai,
 449                         unsigned int tx_mask, unsigned int rx_mask,
 450                         int slots, int slot_width) {
 451         int ret = 0;
 452 
 453         if (!dai->active)
 454                 return ret;
 455 
 456         ret = sst_fill_ssp_slot(dai, tx_mask, rx_mask, slots, slot_width);
 457         if (ret < 0)
 458                 dev_err(dai->dev, "sst_fill_ssp_slot failed..%d\n", ret);
 459 
 460         return ret;
 461 }
 462 
 463 static void sst_disable_ssp(struct snd_pcm_substream *substream,
 464                         struct snd_soc_dai *dai)
 465 {
 466         if (!dai->active) {
 467                 send_ssp_cmd(dai, dai->name, 0);
 468                 sst_handle_vb_timer(dai, false);
 469         }
 470 }
 471 
 472 static const struct snd_soc_dai_ops sst_media_dai_ops = {
 473         .startup = sst_media_open,
 474         .shutdown = sst_media_close,
 475         .prepare = sst_media_prepare,
 476         .hw_params = sst_media_hw_params,
 477         .hw_free = sst_media_hw_free,
 478         .mute_stream = sst_media_digital_mute,
 479 };
 480 
 481 static const struct snd_soc_dai_ops sst_compr_dai_ops = {
 482         .mute_stream = sst_media_digital_mute,
 483 };
 484 
 485 static const struct snd_soc_dai_ops sst_be_dai_ops = {
 486         .startup = sst_enable_ssp,
 487         .hw_params = sst_be_hw_params,
 488         .set_fmt = sst_set_format,
 489         .set_tdm_slot = sst_platform_set_ssp_slot,
 490         .shutdown = sst_disable_ssp,
 491 };
 492 
 493 static struct snd_soc_dai_driver sst_platform_dai[] = {
 494 {
 495         .name = "media-cpu-dai",
 496         .ops = &sst_media_dai_ops,
 497         .playback = {
 498                 .stream_name = "Headset Playback",
 499                 .channels_min = SST_STEREO,
 500                 .channels_max = SST_STEREO,
 501                 .rates = SNDRV_PCM_RATE_44100|SNDRV_PCM_RATE_48000,
 502                 .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE,
 503         },
 504         .capture = {
 505                 .stream_name = "Headset Capture",
 506                 .channels_min = 1,
 507                 .channels_max = 2,
 508                 .rates = SNDRV_PCM_RATE_44100|SNDRV_PCM_RATE_48000,
 509                 .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE,
 510         },
 511 },
 512 {
 513         .name = "deepbuffer-cpu-dai",
 514         .ops = &sst_media_dai_ops,
 515         .playback = {
 516                 .stream_name = "Deepbuffer 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 | SNDRV_PCM_FMTBIT_S24_LE,
 521         },
 522 },
 523 {
 524         .name = "compress-cpu-dai",
 525         .compress_new = snd_soc_new_compress,
 526         .ops = &sst_compr_dai_ops,
 527         .playback = {
 528                 .stream_name = "Compress Playback",
 529                 .channels_min = 1,
 530         },
 531 },
 532 /* BE CPU  Dais */
 533 {
 534         .name = "ssp0-port",
 535         .ops = &sst_be_dai_ops,
 536         .playback = {
 537                 .stream_name = "ssp0 Tx",
 538                 .channels_min = SST_STEREO,
 539                 .channels_max = SST_STEREO,
 540                 .rates = SNDRV_PCM_RATE_48000,
 541                 .formats = SNDRV_PCM_FMTBIT_S16_LE,
 542         },
 543         .capture = {
 544                 .stream_name = "ssp0 Rx",
 545                 .channels_min = SST_STEREO,
 546                 .channels_max = SST_STEREO,
 547                 .rates = SNDRV_PCM_RATE_48000,
 548                 .formats = SNDRV_PCM_FMTBIT_S16_LE,
 549         },
 550 },
 551 {
 552         .name = "ssp1-port",
 553         .ops = &sst_be_dai_ops,
 554         .playback = {
 555                 .stream_name = "ssp1 Tx",
 556                 .channels_min = SST_STEREO,
 557                 .channels_max = SST_STEREO,
 558                 .rates = SNDRV_PCM_RATE_8000|SNDRV_PCM_RATE_16000|SNDRV_PCM_RATE_48000,
 559                 .formats = SNDRV_PCM_FMTBIT_S16_LE,
 560         },
 561         .capture = {
 562                 .stream_name = "ssp1 Rx",
 563                 .channels_min = SST_STEREO,
 564                 .channels_max = SST_STEREO,
 565                 .rates = SNDRV_PCM_RATE_8000|SNDRV_PCM_RATE_16000|SNDRV_PCM_RATE_48000,
 566                 .formats = SNDRV_PCM_FMTBIT_S16_LE,
 567         },
 568 },
 569 {
 570         .name = "ssp2-port",
 571         .ops = &sst_be_dai_ops,
 572         .playback = {
 573                 .stream_name = "ssp2 Tx",
 574                 .channels_min = SST_STEREO,
 575                 .channels_max = SST_STEREO,
 576                 .rates = SNDRV_PCM_RATE_48000,
 577                 .formats = SNDRV_PCM_FMTBIT_S16_LE,
 578         },
 579         .capture = {
 580                 .stream_name = "ssp2 Rx",
 581                 .channels_min = SST_STEREO,
 582                 .channels_max = SST_STEREO,
 583                 .rates = SNDRV_PCM_RATE_48000,
 584                 .formats = SNDRV_PCM_FMTBIT_S16_LE,
 585         },
 586 },
 587 };
 588 
 589 static int sst_platform_open(struct snd_pcm_substream *substream)
 590 {
 591         struct snd_pcm_runtime *runtime;
 592 
 593         if (substream->pcm->internal)
 594                 return 0;
 595 
 596         runtime = substream->runtime;
 597         runtime->hw = sst_platform_pcm_hw;
 598         return 0;
 599 }
 600 
 601 static int sst_platform_pcm_trigger(struct snd_pcm_substream *substream,
 602                                         int cmd)
 603 {
 604         int ret_val = 0, str_id;
 605         struct sst_runtime_stream *stream;
 606         int status;
 607         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 608 
 609         dev_dbg(rtd->dev, "sst_platform_pcm_trigger called\n");
 610         if (substream->pcm->internal)
 611                 return 0;
 612         stream = substream->runtime->private_data;
 613         str_id = stream->stream_info.str_id;
 614         switch (cmd) {
 615         case SNDRV_PCM_TRIGGER_START:
 616                 dev_dbg(rtd->dev, "sst: Trigger Start\n");
 617                 status = SST_PLATFORM_RUNNING;
 618                 stream->stream_info.arg = substream;
 619                 ret_val = stream->ops->stream_start(sst->dev, str_id);
 620                 break;
 621         case SNDRV_PCM_TRIGGER_STOP:
 622                 dev_dbg(rtd->dev, "sst: in stop\n");
 623                 status = SST_PLATFORM_DROPPED;
 624                 ret_val = stream->ops->stream_drop(sst->dev, str_id);
 625                 break;
 626         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
 627         case SNDRV_PCM_TRIGGER_SUSPEND:
 628                 dev_dbg(rtd->dev, "sst: in pause\n");
 629                 status = SST_PLATFORM_PAUSED;
 630                 ret_val = stream->ops->stream_pause(sst->dev, str_id);
 631                 break;
 632         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
 633         case SNDRV_PCM_TRIGGER_RESUME:
 634                 dev_dbg(rtd->dev, "sst: in pause release\n");
 635                 status = SST_PLATFORM_RUNNING;
 636                 ret_val = stream->ops->stream_pause_release(sst->dev, str_id);
 637                 break;
 638         default:
 639                 return -EINVAL;
 640         }
 641 
 642         if (!ret_val)
 643                 sst_set_stream_status(stream, status);
 644 
 645         return ret_val;
 646 }
 647 
 648 
 649 static snd_pcm_uframes_t sst_platform_pcm_pointer
 650                         (struct snd_pcm_substream *substream)
 651 {
 652         struct sst_runtime_stream *stream;
 653         int ret_val, status;
 654         struct pcm_stream_info *str_info;
 655         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 656 
 657         stream = substream->runtime->private_data;
 658         status = sst_get_stream_status(stream);
 659         if (status == SST_PLATFORM_INIT)
 660                 return 0;
 661         str_info = &stream->stream_info;
 662         ret_val = stream->ops->stream_read_tstamp(sst->dev, str_info);
 663         if (ret_val) {
 664                 dev_err(rtd->dev, "sst: error code = %d\n", ret_val);
 665                 return ret_val;
 666         }
 667         substream->runtime->delay = str_info->pcm_delay;
 668         return str_info->buffer_ptr;
 669 }
 670 
 671 static const struct snd_pcm_ops sst_platform_ops = {
 672         .open = sst_platform_open,
 673         .ioctl = snd_pcm_lib_ioctl,
 674         .trigger = sst_platform_pcm_trigger,
 675         .pointer = sst_platform_pcm_pointer,
 676 };
 677 
 678 static int sst_pcm_new(struct snd_soc_pcm_runtime *rtd)
 679 {
 680         struct snd_soc_dai *dai = rtd->cpu_dai;
 681         struct snd_pcm *pcm = rtd->pcm;
 682 
 683         if (dai->driver->playback.channels_min ||
 684                         dai->driver->capture.channels_min) {
 685                 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         }
 690         return 0;
 691 }
 692 
 693 static int sst_soc_probe(struct snd_soc_component *component)
 694 {
 695         struct sst_data *drv = dev_get_drvdata(component->dev);
 696 
 697         drv->soc_card = component->card;
 698         return sst_dsp_init_v2_dpcm(component);
 699 }
 700 
 701 static void sst_soc_remove(struct snd_soc_component *component)
 702 {
 703         struct sst_data *drv = dev_get_drvdata(component->dev);
 704 
 705         drv->soc_card = NULL;
 706 }
 707 
 708 static const struct snd_soc_component_driver sst_soc_platform_drv  = {
 709         .name           = DRV_NAME,
 710         .probe          = sst_soc_probe,
 711         .remove         = sst_soc_remove,
 712         .ops            = &sst_platform_ops,
 713         .compr_ops      = &sst_platform_compr_ops,
 714         .pcm_new        = sst_pcm_new,
 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 = devm_snd_soc_register_component(&pdev->dev, &sst_soc_platform_drv,
 741                                 sst_platform_dai, ARRAY_SIZE(sst_platform_dai));
 742         if (ret)
 743                 dev_err(&pdev->dev, "registering cpu dais failed\n");
 744 
 745         return ret;
 746 }
 747 
 748 static int sst_platform_remove(struct platform_device *pdev)
 749 {
 750         dev_dbg(&pdev->dev, "sst_platform_remove success\n");
 751         return 0;
 752 }
 753 
 754 #ifdef CONFIG_PM_SLEEP
 755 
 756 static int sst_soc_prepare(struct device *dev)
 757 {
 758         struct sst_data *drv = dev_get_drvdata(dev);
 759         struct snd_soc_pcm_runtime *rtd;
 760 
 761         if (!drv->soc_card)
 762                 return 0;
 763 
 764         /* suspend all pcms first */
 765         snd_soc_suspend(drv->soc_card->dev);
 766         snd_soc_poweroff(drv->soc_card->dev);
 767 
 768         /* set the SSPs to idle */
 769         for_each_card_rtds(drv->soc_card, rtd) {
 770                 struct snd_soc_dai *dai = rtd->cpu_dai;
 771 
 772                 if (dai->active) {
 773                         send_ssp_cmd(dai, dai->name, 0);
 774                         sst_handle_vb_timer(dai, false);
 775                 }
 776         }
 777 
 778         return 0;
 779 }
 780 
 781 static void sst_soc_complete(struct device *dev)
 782 {
 783         struct sst_data *drv = dev_get_drvdata(dev);
 784         struct snd_soc_pcm_runtime *rtd;
 785 
 786         if (!drv->soc_card)
 787                 return;
 788 
 789         /* restart SSPs */
 790         for_each_card_rtds(drv->soc_card, rtd) {
 791                 struct snd_soc_dai *dai = rtd->cpu_dai;
 792 
 793                 if (dai->active) {
 794                         sst_handle_vb_timer(dai, true);
 795                         send_ssp_cmd(dai, dai->name, 1);
 796                 }
 797         }
 798         snd_soc_resume(drv->soc_card->dev);
 799 }
 800 
 801 #else
 802 
 803 #define sst_soc_prepare NULL
 804 #define sst_soc_complete NULL
 805 
 806 #endif
 807 
 808 
 809 static const struct dev_pm_ops sst_platform_pm = {
 810         .prepare        = sst_soc_prepare,
 811         .complete       = sst_soc_complete,
 812 };
 813 
 814 static struct platform_driver sst_platform_driver = {
 815         .driver         = {
 816                 .name           = "sst-mfld-platform",
 817                 .pm             = &sst_platform_pm,
 818         },
 819         .probe          = sst_platform_probe,
 820         .remove         = sst_platform_remove,
 821 };
 822 
 823 module_platform_driver(sst_platform_driver);
 824 
 825 MODULE_DESCRIPTION("ASoC Intel(R) MID Platform driver");
 826 MODULE_AUTHOR("Vinod Koul <vinod.koul@intel.com>");
 827 MODULE_AUTHOR("Harsha Priya <priya.harsha@intel.com>");
 828 MODULE_LICENSE("GPL v2");
 829 MODULE_ALIAS("platform:sst-atom-hifi2-platform");
 830 MODULE_ALIAS("platform:sst-mfld-platform");

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