linux/sound/soc/intel/atom/sst-mfld-platform-pcm.c
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   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
  26struct sst_device *sst;
  27static DEFINE_MUTEX(sst_lock);
  28
  29int 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}
  47EXPORT_SYMBOL_GPL(sst_register_dsp);
  48
  49int 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}
  69EXPORT_SYMBOL_GPL(sst_unregister_dsp);
  70
  71static 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
  88static 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
  96static 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 */
 103void 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
 112static 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
 123static 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}
 142static 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
 156static 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
 173int 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
 222static 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
 256static 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
 273static 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 = asoc_substream_to_rtd(substream);
 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
 293static int power_up_sst(struct sst_runtime_stream *stream)
 294{
 295        return stream->ops->power(sst->dev, true);
 296}
 297
 298static void power_down_sst(struct sst_runtime_stream *stream)
 299{
 300        stream->ops->power(sst->dev, false);
 301}
 302
 303static 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                goto out_power_up;
 335
 336        /*
 337         * Make sure the period to be multiple of 1ms to align the
 338         * design of firmware. Apply same rule to buffer size to make
 339         * sure alsa could always find a value for period size
 340         * regardless the buffer size given by user space.
 341         */
 342        snd_pcm_hw_constraint_step(substream->runtime, 0,
 343                           SNDRV_PCM_HW_PARAM_PERIOD_SIZE, 48);
 344        snd_pcm_hw_constraint_step(substream->runtime, 0,
 345                           SNDRV_PCM_HW_PARAM_BUFFER_SIZE, 48);
 346
 347        /* Make sure, that the period size is always even */
 348        snd_pcm_hw_constraint_step(substream->runtime, 0,
 349                           SNDRV_PCM_HW_PARAM_PERIODS, 2);
 350
 351        return snd_pcm_hw_constraint_integer(runtime,
 352                         SNDRV_PCM_HW_PARAM_PERIODS);
 353out_ops:
 354        mutex_unlock(&sst_lock);
 355out_power_up:
 356        kfree(stream);
 357        return ret_val;
 358}
 359
 360static void sst_media_close(struct snd_pcm_substream *substream,
 361                struct snd_soc_dai *dai)
 362{
 363        struct sst_runtime_stream *stream;
 364        int str_id;
 365
 366        stream = substream->runtime->private_data;
 367        power_down_sst(stream);
 368
 369        str_id = stream->stream_info.str_id;
 370        if (str_id)
 371                stream->ops->close(sst->dev, str_id);
 372        module_put(sst->dev->driver->owner);
 373        kfree(stream);
 374}
 375
 376static int sst_media_prepare(struct snd_pcm_substream *substream,
 377                struct snd_soc_dai *dai)
 378{
 379        struct sst_runtime_stream *stream;
 380        int ret_val, str_id;
 381
 382        stream = substream->runtime->private_data;
 383        str_id = stream->stream_info.str_id;
 384        if (stream->stream_info.str_id) {
 385                ret_val = stream->ops->stream_drop(sst->dev, str_id);
 386                return ret_val;
 387        }
 388
 389        ret_val = sst_platform_alloc_stream(substream, dai);
 390        if (ret_val <= 0)
 391                return ret_val;
 392        snprintf(substream->pcm->id, sizeof(substream->pcm->id),
 393                        "%d", stream->stream_info.str_id);
 394
 395        ret_val = sst_platform_init_stream(substream);
 396        if (ret_val)
 397                return ret_val;
 398        substream->runtime->hw.info = SNDRV_PCM_INFO_BLOCK_TRANSFER;
 399        return 0;
 400}
 401
 402static int sst_enable_ssp(struct snd_pcm_substream *substream,
 403                        struct snd_soc_dai *dai)
 404{
 405        int ret = 0;
 406
 407        if (!snd_soc_dai_active(dai)) {
 408                ret = sst_handle_vb_timer(dai, true);
 409                sst_fill_ssp_defaults(dai);
 410        }
 411        return ret;
 412}
 413
 414static int sst_be_hw_params(struct snd_pcm_substream *substream,
 415                                struct snd_pcm_hw_params *params,
 416                                struct snd_soc_dai *dai)
 417{
 418        int ret = 0;
 419
 420        if (snd_soc_dai_active(dai) == 1)
 421                ret = send_ssp_cmd(dai, dai->name, 1);
 422        return ret;
 423}
 424
 425static int sst_set_format(struct snd_soc_dai *dai, unsigned int fmt)
 426{
 427        int ret = 0;
 428
 429        if (!snd_soc_dai_active(dai))
 430                return 0;
 431
 432        ret = sst_fill_ssp_config(dai, fmt);
 433        if (ret < 0)
 434                dev_err(dai->dev, "sst_set_format failed..\n");
 435
 436        return ret;
 437}
 438
 439static int sst_platform_set_ssp_slot(struct snd_soc_dai *dai,
 440                        unsigned int tx_mask, unsigned int rx_mask,
 441                        int slots, int slot_width) {
 442        int ret = 0;
 443
 444        if (!snd_soc_dai_active(dai))
 445                return ret;
 446
 447        ret = sst_fill_ssp_slot(dai, tx_mask, rx_mask, slots, slot_width);
 448        if (ret < 0)
 449                dev_err(dai->dev, "sst_fill_ssp_slot failed..%d\n", ret);
 450
 451        return ret;
 452}
 453
 454static void sst_disable_ssp(struct snd_pcm_substream *substream,
 455                        struct snd_soc_dai *dai)
 456{
 457        if (!snd_soc_dai_active(dai)) {
 458                send_ssp_cmd(dai, dai->name, 0);
 459                sst_handle_vb_timer(dai, false);
 460        }
 461}
 462
 463static const struct snd_soc_dai_ops sst_media_dai_ops = {
 464        .startup = sst_media_open,
 465        .shutdown = sst_media_close,
 466        .prepare = sst_media_prepare,
 467        .mute_stream = sst_media_digital_mute,
 468};
 469
 470static const struct snd_soc_dai_ops sst_compr_dai_ops = {
 471        .mute_stream = sst_media_digital_mute,
 472};
 473
 474static const struct snd_soc_dai_ops sst_be_dai_ops = {
 475        .startup = sst_enable_ssp,
 476        .hw_params = sst_be_hw_params,
 477        .set_fmt = sst_set_format,
 478        .set_tdm_slot = sst_platform_set_ssp_slot,
 479        .shutdown = sst_disable_ssp,
 480};
 481
 482static struct snd_soc_dai_driver sst_platform_dai[] = {
 483{
 484        .name = "media-cpu-dai",
 485        .ops = &sst_media_dai_ops,
 486        .playback = {
 487                .stream_name = "Headset Playback",
 488                .channels_min = SST_STEREO,
 489                .channels_max = SST_STEREO,
 490                .rates = SNDRV_PCM_RATE_44100|SNDRV_PCM_RATE_48000,
 491                .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE,
 492        },
 493        .capture = {
 494                .stream_name = "Headset Capture",
 495                .channels_min = 1,
 496                .channels_max = 2,
 497                .rates = SNDRV_PCM_RATE_44100|SNDRV_PCM_RATE_48000,
 498                .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE,
 499        },
 500},
 501{
 502        .name = "deepbuffer-cpu-dai",
 503        .ops = &sst_media_dai_ops,
 504        .playback = {
 505                .stream_name = "Deepbuffer 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 | SNDRV_PCM_FMTBIT_S24_LE,
 510        },
 511},
 512{
 513        .name = "compress-cpu-dai",
 514        .compress_new = snd_soc_new_compress,
 515        .ops = &sst_compr_dai_ops,
 516        .playback = {
 517                .stream_name = "Compress Playback",
 518                .channels_min = 1,
 519        },
 520},
 521/* BE CPU  Dais */
 522{
 523        .name = "ssp0-port",
 524        .ops = &sst_be_dai_ops,
 525        .playback = {
 526                .stream_name = "ssp0 Tx",
 527                .channels_min = SST_STEREO,
 528                .channels_max = SST_STEREO,
 529                .rates = SNDRV_PCM_RATE_48000,
 530                .formats = SNDRV_PCM_FMTBIT_S16_LE,
 531        },
 532        .capture = {
 533                .stream_name = "ssp0 Rx",
 534                .channels_min = SST_STEREO,
 535                .channels_max = SST_STEREO,
 536                .rates = SNDRV_PCM_RATE_48000,
 537                .formats = SNDRV_PCM_FMTBIT_S16_LE,
 538        },
 539},
 540{
 541        .name = "ssp1-port",
 542        .ops = &sst_be_dai_ops,
 543        .playback = {
 544                .stream_name = "ssp1 Tx",
 545                .channels_min = SST_STEREO,
 546                .channels_max = SST_STEREO,
 547                .rates = SNDRV_PCM_RATE_8000|SNDRV_PCM_RATE_16000|SNDRV_PCM_RATE_48000,
 548                .formats = SNDRV_PCM_FMTBIT_S16_LE,
 549        },
 550        .capture = {
 551                .stream_name = "ssp1 Rx",
 552                .channels_min = SST_STEREO,
 553                .channels_max = SST_STEREO,
 554                .rates = SNDRV_PCM_RATE_8000|SNDRV_PCM_RATE_16000|SNDRV_PCM_RATE_48000,
 555                .formats = SNDRV_PCM_FMTBIT_S16_LE,
 556        },
 557},
 558{
 559        .name = "ssp2-port",
 560        .ops = &sst_be_dai_ops,
 561        .playback = {
 562                .stream_name = "ssp2 Tx",
 563                .channels_min = SST_STEREO,
 564                .channels_max = SST_STEREO,
 565                .rates = SNDRV_PCM_RATE_48000,
 566                .formats = SNDRV_PCM_FMTBIT_S16_LE,
 567        },
 568        .capture = {
 569                .stream_name = "ssp2 Rx",
 570                .channels_min = SST_STEREO,
 571                .channels_max = SST_STEREO,
 572                .rates = SNDRV_PCM_RATE_48000,
 573                .formats = SNDRV_PCM_FMTBIT_S16_LE,
 574        },
 575},
 576};
 577
 578static int sst_soc_open(struct snd_soc_component *component,
 579                        struct snd_pcm_substream *substream)
 580{
 581        struct snd_pcm_runtime *runtime;
 582
 583        if (substream->pcm->internal)
 584                return 0;
 585
 586        runtime = substream->runtime;
 587        runtime->hw = sst_platform_pcm_hw;
 588        return 0;
 589}
 590
 591static int sst_soc_trigger(struct snd_soc_component *component,
 592                           struct snd_pcm_substream *substream, int cmd)
 593{
 594        int ret_val = 0, str_id;
 595        struct sst_runtime_stream *stream;
 596        int status;
 597        struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
 598
 599        dev_dbg(rtd->dev, "%s called\n", __func__);
 600        if (substream->pcm->internal)
 601                return 0;
 602        stream = substream->runtime->private_data;
 603        str_id = stream->stream_info.str_id;
 604        switch (cmd) {
 605        case SNDRV_PCM_TRIGGER_START:
 606                dev_dbg(rtd->dev, "sst: Trigger Start\n");
 607                status = SST_PLATFORM_RUNNING;
 608                stream->stream_info.arg = substream;
 609                ret_val = stream->ops->stream_start(sst->dev, str_id);
 610                break;
 611        case SNDRV_PCM_TRIGGER_STOP:
 612                dev_dbg(rtd->dev, "sst: in stop\n");
 613                status = SST_PLATFORM_DROPPED;
 614                ret_val = stream->ops->stream_drop(sst->dev, str_id);
 615                break;
 616        case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
 617        case SNDRV_PCM_TRIGGER_SUSPEND:
 618                dev_dbg(rtd->dev, "sst: in pause\n");
 619                status = SST_PLATFORM_PAUSED;
 620                ret_val = stream->ops->stream_pause(sst->dev, str_id);
 621                break;
 622        case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
 623        case SNDRV_PCM_TRIGGER_RESUME:
 624                dev_dbg(rtd->dev, "sst: in pause release\n");
 625                status = SST_PLATFORM_RUNNING;
 626                ret_val = stream->ops->stream_pause_release(sst->dev, str_id);
 627                break;
 628        default:
 629                return -EINVAL;
 630        }
 631
 632        if (!ret_val)
 633                sst_set_stream_status(stream, status);
 634
 635        return ret_val;
 636}
 637
 638
 639static snd_pcm_uframes_t sst_soc_pointer(struct snd_soc_component *component,
 640                                         struct snd_pcm_substream *substream)
 641{
 642        struct sst_runtime_stream *stream;
 643        int ret_val, status;
 644        struct pcm_stream_info *str_info;
 645        struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
 646
 647        stream = substream->runtime->private_data;
 648        status = sst_get_stream_status(stream);
 649        if (status == SST_PLATFORM_INIT)
 650                return 0;
 651        str_info = &stream->stream_info;
 652        ret_val = stream->ops->stream_read_tstamp(sst->dev, str_info);
 653        if (ret_val) {
 654                dev_err(rtd->dev, "sst: error code = %d\n", ret_val);
 655                return ret_val;
 656        }
 657        substream->runtime->delay = str_info->pcm_delay;
 658        return str_info->buffer_ptr;
 659}
 660
 661static int sst_soc_pcm_new(struct snd_soc_component *component,
 662                           struct snd_soc_pcm_runtime *rtd)
 663{
 664        struct snd_soc_dai *dai = asoc_rtd_to_cpu(rtd, 0);
 665        struct snd_pcm *pcm = rtd->pcm;
 666
 667        if (dai->driver->playback.channels_min ||
 668                        dai->driver->capture.channels_min) {
 669                snd_pcm_set_managed_buffer_all(pcm,
 670                        SNDRV_DMA_TYPE_CONTINUOUS,
 671                        snd_dma_continuous_data(GFP_DMA),
 672                        SST_MIN_BUFFER, SST_MAX_BUFFER);
 673        }
 674        return 0;
 675}
 676
 677static int sst_soc_probe(struct snd_soc_component *component)
 678{
 679        struct sst_data *drv = dev_get_drvdata(component->dev);
 680
 681        drv->soc_card = component->card;
 682        return sst_dsp_init_v2_dpcm(component);
 683}
 684
 685static void sst_soc_remove(struct snd_soc_component *component)
 686{
 687        struct sst_data *drv = dev_get_drvdata(component->dev);
 688
 689        drv->soc_card = NULL;
 690}
 691
 692static const struct snd_soc_component_driver sst_soc_platform_drv  = {
 693        .name           = DRV_NAME,
 694        .probe          = sst_soc_probe,
 695        .remove         = sst_soc_remove,
 696        .open           = sst_soc_open,
 697        .trigger        = sst_soc_trigger,
 698        .pointer        = sst_soc_pointer,
 699        .compress_ops   = &sst_platform_compress_ops,
 700        .pcm_construct  = sst_soc_pcm_new,
 701};
 702
 703static int sst_platform_probe(struct platform_device *pdev)
 704{
 705        struct sst_data *drv;
 706        int ret;
 707        struct sst_platform_data *pdata;
 708
 709        drv = devm_kzalloc(&pdev->dev, sizeof(*drv), GFP_KERNEL);
 710        if (drv == NULL) {
 711                return -ENOMEM;
 712        }
 713
 714        pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
 715        if (pdata == NULL) {
 716                return -ENOMEM;
 717        }
 718
 719        pdata->pdev_strm_map = dpcm_strm_map;
 720        pdata->strm_map_size = ARRAY_SIZE(dpcm_strm_map);
 721        drv->pdata = pdata;
 722        drv->pdev = pdev;
 723        mutex_init(&drv->lock);
 724        dev_set_drvdata(&pdev->dev, drv);
 725
 726        ret = devm_snd_soc_register_component(&pdev->dev, &sst_soc_platform_drv,
 727                                sst_platform_dai, ARRAY_SIZE(sst_platform_dai));
 728        if (ret)
 729                dev_err(&pdev->dev, "registering cpu dais failed\n");
 730
 731        return ret;
 732}
 733
 734static int sst_platform_remove(struct platform_device *pdev)
 735{
 736        dev_dbg(&pdev->dev, "sst_platform_remove success\n");
 737        return 0;
 738}
 739
 740#ifdef CONFIG_PM_SLEEP
 741
 742static int sst_soc_prepare(struct device *dev)
 743{
 744        struct sst_data *drv = dev_get_drvdata(dev);
 745        struct snd_soc_pcm_runtime *rtd;
 746
 747        if (!drv->soc_card)
 748                return 0;
 749
 750        /* suspend all pcms first */
 751        snd_soc_suspend(drv->soc_card->dev);
 752        snd_soc_poweroff(drv->soc_card->dev);
 753
 754        /* set the SSPs to idle */
 755        for_each_card_rtds(drv->soc_card, rtd) {
 756                struct snd_soc_dai *dai = asoc_rtd_to_cpu(rtd, 0);
 757
 758                if (snd_soc_dai_active(dai)) {
 759                        send_ssp_cmd(dai, dai->name, 0);
 760                        sst_handle_vb_timer(dai, false);
 761                }
 762        }
 763
 764        return 0;
 765}
 766
 767static void sst_soc_complete(struct device *dev)
 768{
 769        struct sst_data *drv = dev_get_drvdata(dev);
 770        struct snd_soc_pcm_runtime *rtd;
 771
 772        if (!drv->soc_card)
 773                return;
 774
 775        /* restart SSPs */
 776        for_each_card_rtds(drv->soc_card, rtd) {
 777                struct snd_soc_dai *dai = asoc_rtd_to_cpu(rtd, 0);
 778
 779                if (snd_soc_dai_active(dai)) {
 780                        sst_handle_vb_timer(dai, true);
 781                        send_ssp_cmd(dai, dai->name, 1);
 782                }
 783        }
 784        snd_soc_resume(drv->soc_card->dev);
 785}
 786
 787#else
 788
 789#define sst_soc_prepare NULL
 790#define sst_soc_complete NULL
 791
 792#endif
 793
 794
 795static const struct dev_pm_ops sst_platform_pm = {
 796        .prepare        = sst_soc_prepare,
 797        .complete       = sst_soc_complete,
 798};
 799
 800static struct platform_driver sst_platform_driver = {
 801        .driver         = {
 802                .name           = "sst-mfld-platform",
 803                .pm             = &sst_platform_pm,
 804        },
 805        .probe          = sst_platform_probe,
 806        .remove         = sst_platform_remove,
 807};
 808
 809module_platform_driver(sst_platform_driver);
 810
 811MODULE_DESCRIPTION("ASoC Intel(R) MID Platform driver");
 812MODULE_AUTHOR("Vinod Koul <vinod.koul@intel.com>");
 813MODULE_AUTHOR("Harsha Priya <priya.harsha@intel.com>");
 814MODULE_LICENSE("GPL v2");
 815MODULE_ALIAS("platform:sst-atom-hifi2-platform");
 816MODULE_ALIAS("platform:sst-mfld-platform");
 817