sound/soc/intel/baytrail/sst-baytrail-pcm.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Intel Baytrail SST PCM Support
   4  * Copyright (c) 2014, Intel Corporation.
   5  */
   6
   7 #include <linux/module.h>
   8 #include <linux/dma-mapping.h>
   9 #include <linux/slab.h>
  10 #include <sound/core.h>
  11 #include <sound/pcm.h>
  12 #include <sound/pcm_params.h>
  13 #include <sound/soc.h>
  14 #include "sst-baytrail-ipc.h"
  15 #include "../common/sst-dsp-priv.h"
  16 #include "../common/sst-dsp.h"
  17
  18 #define DRV_NAME "byt-dai"
  19 #define BYT_PCM_COUNT           2
  20
  21 static const struct snd_pcm_hardware sst_byt_pcm_hardware = {
  22         .info                   = SNDRV_PCM_INFO_MMAP |
  23                                   SNDRV_PCM_INFO_MMAP_VALID |
  24                                   SNDRV_PCM_INFO_INTERLEAVED |
  25                                   SNDRV_PCM_INFO_PAUSE |
  26                                   SNDRV_PCM_INFO_RESUME,
  27         .formats                = SNDRV_PCM_FMTBIT_S16_LE |
  28                                   SNDRV_PCM_FMTBIT_S24_LE,
  29         .period_bytes_min       = 384,
  30         .period_bytes_max       = 48000,
  31         .periods_min            = 2,
  32         .periods_max            = 250,
  33         .buffer_bytes_max       = 96000,
  34 };
  35
  36 /* private data for each PCM DSP stream */
  37 struct sst_byt_pcm_data {
  38         struct sst_byt_stream *stream;
  39         struct snd_pcm_substream *substream;
  40         struct mutex mutex;
  41
  42         /* latest DSP DMA hw pointer */
  43         u32 hw_ptr;
  44
  45         struct work_struct work;
  46 };
  47
  48 /* private data for the driver */
  49 struct sst_byt_priv_data {
  50         /* runtime DSP */
  51         struct sst_byt *byt;
  52
  53         /* DAI data */
  54         struct sst_byt_pcm_data pcm[BYT_PCM_COUNT];
  55
  56         /* flag indicating is stream context restore needed after suspend */
  57         bool restore_stream;
  58 };
  59
  60 /* this may get called several times by oss emulation */
  61 static int sst_byt_pcm_hw_params(struct snd_soc_component *component,
  62                                  struct snd_pcm_substream *substream,
  63                                  struct snd_pcm_hw_params *params)
  64 {
  65         struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
  66         struct sst_byt_priv_data *pdata = snd_soc_component_get_drvdata(component);
  67         struct sst_byt_pcm_data *pcm_data = &pdata->pcm[substream->stream];
  68         struct sst_byt *byt = pdata->byt;
  69         u32 rate, bits;
  70         u8 channels;
  71         int ret, playback = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK);
  72
  73         dev_dbg(rtd->dev, "PCM: hw_params, pcm_data %p\n", pcm_data);
  74
  75         ret = sst_byt_stream_type(byt, pcm_data->stream,
  76                                   1, 1, !playback);
  77         if (ret < 0) {
  78                 dev_err(rtd->dev, "failed to set stream format %d\n", ret);
  79                 return ret;
  80         }
  81
  82         rate = params_rate(params);
  83         ret = sst_byt_stream_set_rate(byt, pcm_data->stream, rate);
  84         if (ret < 0) {
  85                 dev_err(rtd->dev, "could not set rate %d\n", rate);
  86                 return ret;
  87         }
  88
  89         bits = snd_pcm_format_width(params_format(params));
  90         ret = sst_byt_stream_set_bits(byt, pcm_data->stream, bits);
  91         if (ret < 0) {
  92                 dev_err(rtd->dev, "could not set formats %d\n",
  93                         params_rate(params));
  94                 return ret;
  95         }
  96
  97         channels = (u8)(params_channels(params) & 0xF);
  98         ret = sst_byt_stream_set_channels(byt, pcm_data->stream, channels);
  99         if (ret < 0) {
 100                 dev_err(rtd->dev, "could not set channels %d\n",
 101                         params_rate(params));
 102                 return ret;
 103         }
 104
 105         ret = sst_byt_stream_buffer(byt, pcm_data->stream,
 106                                     substream->dma_buffer.addr,
 107                                     params_buffer_bytes(params));
 108         if (ret < 0) {
 109                 dev_err(rtd->dev, "PCM: failed to set DMA buffer %d\n", ret);
 110                 return ret;
 111         }
 112
 113         ret = sst_byt_stream_commit(byt, pcm_data->stream);
 114         if (ret < 0) {
 115                 dev_err(rtd->dev, "PCM: failed stream commit %d\n", ret);
 116                 return ret;
 117         }
 118
 119         return 0;
 120 }
 121
 122 static int sst_byt_pcm_restore_stream_context(struct snd_pcm_substream *substream)
 123 {
 124         struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
 125         struct snd_soc_component *component = snd_soc_rtdcom_lookup(rtd, DRV_NAME);
 126         struct sst_byt_priv_data *pdata = snd_soc_component_get_drvdata(component);
 127         struct sst_byt_pcm_data *pcm_data = &pdata->pcm[substream->stream];
 128         struct sst_byt *byt = pdata->byt;
 129         int ret;
 130
 131         /* commit stream using existing stream params */
 132         ret = sst_byt_stream_commit(byt, pcm_data->stream);
 133         if (ret < 0) {
 134                 dev_err(rtd->dev, "PCM: failed stream commit %d\n", ret);
 135                 return ret;
 136         }
 137
 138         sst_byt_stream_start(byt, pcm_data->stream, pcm_data->hw_ptr);
 139
 140         dev_dbg(rtd->dev, "stream context restored at offset %d\n",
 141                 pcm_data->hw_ptr);
 142
 143         return 0;
 144 }
 145
 146 static void sst_byt_pcm_work(struct work_struct *work)
 147 {
 148         struct sst_byt_pcm_data *pcm_data =
 149                 container_of(work, struct sst_byt_pcm_data, work);
 150
 151         if (snd_pcm_running(pcm_data->substream))
 152                 sst_byt_pcm_restore_stream_context(pcm_data->substream);
 153 }
 154
 155 static int sst_byt_pcm_trigger(struct snd_soc_component *component,
 156                                struct snd_pcm_substream *substream, int cmd)
 157 {
 158         struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
 159         struct sst_byt_priv_data *pdata = snd_soc_component_get_drvdata(component);
 160         struct sst_byt_pcm_data *pcm_data = &pdata->pcm[substream->stream];
 161         struct sst_byt *byt = pdata->byt;
 162
 163         dev_dbg(rtd->dev, "PCM: trigger %d\n", cmd);
 164
 165         switch (cmd) {
 166         case SNDRV_PCM_TRIGGER_START:
 167                 pcm_data->hw_ptr = 0;
 168                 sst_byt_stream_start(byt, pcm_data->stream, 0);
 169                 break;
 170         case SNDRV_PCM_TRIGGER_RESUME:
 171                 if (pdata->restore_stream)
 172                         schedule_work(&pcm_data->work);
 173                 else
 174                         sst_byt_stream_resume(byt, pcm_data->stream);
 175                 break;
 176         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
 177                 sst_byt_stream_resume(byt, pcm_data->stream);
 178                 break;
 179         case SNDRV_PCM_TRIGGER_STOP:
 180                 sst_byt_stream_stop(byt, pcm_data->stream);
 181                 break;
 182         case SNDRV_PCM_TRIGGER_SUSPEND:
 183                 pdata->restore_stream = false;
 184                 fallthrough;
 185         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
 186                 sst_byt_stream_pause(byt, pcm_data->stream);
 187                 break;
 188         default:
 189                 break;
 190         }
 191
 192         return 0;
 193 }
 194
 195 static u32 byt_notify_pointer(struct sst_byt_stream *stream, void *data)
 196 {
 197         struct sst_byt_pcm_data *pcm_data = data;
 198         struct snd_pcm_substream *substream = pcm_data->substream;
 199         struct snd_pcm_runtime *runtime = substream->runtime;
 200         struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
 201         struct snd_soc_component *component = snd_soc_rtdcom_lookup(rtd, DRV_NAME);
 202         struct sst_byt_priv_data *pdata = snd_soc_component_get_drvdata(component);
 203         struct sst_byt *byt = pdata->byt;
 204         u32 pos, hw_pos;
 205
 206         hw_pos = sst_byt_get_dsp_position(byt, pcm_data->stream,
 207                                           snd_pcm_lib_buffer_bytes(substream));
 208         pcm_data->hw_ptr = hw_pos;
 209         pos = frames_to_bytes(runtime,
 210                               (runtime->control->appl_ptr %
 211                                runtime->buffer_size));
 212
 213         dev_dbg(rtd->dev, "PCM: App/DMA pointer %u/%u bytes\n", pos, hw_pos);
 214
 215         snd_pcm_period_elapsed(substream);
 216         return pos;
 217 }
 218
 219 static snd_pcm_uframes_t sst_byt_pcm_pointer(struct snd_soc_component *component,
 220                                              struct snd_pcm_substream *substream)
 221 {
 222         struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
 223         struct snd_pcm_runtime *runtime = substream->runtime;
 224         struct sst_byt_priv_data *pdata = snd_soc_component_get_drvdata(component);
 225         struct sst_byt_pcm_data *pcm_data = &pdata->pcm[substream->stream];
 226
 227         dev_dbg(rtd->dev, "PCM: DMA pointer %u bytes\n", pcm_data->hw_ptr);
 228
 229         return bytes_to_frames(runtime, pcm_data->hw_ptr);
 230 }
 231
 232 static int sst_byt_pcm_open(struct snd_soc_component *component,
 233                             struct snd_pcm_substream *substream)
 234 {
 235         struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
 236         struct sst_byt_priv_data *pdata = snd_soc_component_get_drvdata(component);
 237         struct sst_byt_pcm_data *pcm_data = &pdata->pcm[substream->stream];
 238         struct sst_byt *byt = pdata->byt;
 239
 240         dev_dbg(rtd->dev, "PCM: open\n");
 241
 242         mutex_lock(&pcm_data->mutex);
 243
 244         pcm_data->substream = substream;
 245
 246         snd_soc_set_runtime_hwparams(substream, &sst_byt_pcm_hardware);
 247
 248         pcm_data->stream = sst_byt_stream_new(byt, substream->stream + 1,
 249                                               byt_notify_pointer, pcm_data);
 250         if (pcm_data->stream == NULL) {
 251                 dev_err(rtd->dev, "failed to create stream\n");
 252                 mutex_unlock(&pcm_data->mutex);
 253                 return -EINVAL;
 254         }
 255
 256         mutex_unlock(&pcm_data->mutex);
 257         return 0;
 258 }
 259
 260 static int sst_byt_pcm_close(struct snd_soc_component *component,
 261                              struct snd_pcm_substream *substream)
 262 {
 263         struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
 264         struct sst_byt_priv_data *pdata = snd_soc_component_get_drvdata(component);
 265         struct sst_byt_pcm_data *pcm_data = &pdata->pcm[substream->stream];
 266         struct sst_byt *byt = pdata->byt;
 267         int ret;
 268
 269         dev_dbg(rtd->dev, "PCM: close\n");
 270
 271         cancel_work_sync(&pcm_data->work);
 272         mutex_lock(&pcm_data->mutex);
 273         ret = sst_byt_stream_free(byt, pcm_data->stream);
 274         if (ret < 0) {
 275                 dev_dbg(rtd->dev, "Free stream fail\n");
 276                 goto out;
 277         }
 278         pcm_data->stream = NULL;
 279
 280 out:
 281         mutex_unlock(&pcm_data->mutex);
 282         return ret;
 283 }
 284
 285 static int sst_byt_pcm_mmap(struct snd_soc_component *component,
 286                             struct snd_pcm_substream *substream,
 287                             struct vm_area_struct *vma)
 288 {
 289         struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
 290
 291         dev_dbg(rtd->dev, "PCM: mmap\n");
 292         return snd_pcm_lib_default_mmap(substream, vma);
 293 }
 294
 295 static int sst_byt_pcm_new(struct snd_soc_component *component,
 296                            struct snd_soc_pcm_runtime *rtd)
 297 {
 298         struct snd_pcm *pcm = rtd->pcm;
 299         size_t size;
 300         struct sst_pdata *pdata = dev_get_platdata(component->dev);
 301
 302         if (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream ||
 303             pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream) {
 304                 size = sst_byt_pcm_hardware.buffer_bytes_max;
 305                 snd_pcm_set_managed_buffer_all(pcm, SNDRV_DMA_TYPE_DEV,
 306                                                pdata->dma_dev, size, size);
 307         }
 308
 309         return 0;
 310 }
 311
 312 static struct snd_soc_dai_driver byt_dais[] = {
 313         {
 314                 .name  = "Baytrail PCM",
 315                 .playback = {
 316                         .stream_name = "System Playback",
 317                         .channels_min = 2,
 318                         .channels_max = 2,
 319                         .rates = SNDRV_PCM_RATE_48000,
 320                         .formats = SNDRV_PCM_FMTBIT_S24_3LE |
 321                                    SNDRV_PCM_FMTBIT_S16_LE,
 322                 },
 323                 .capture = {
 324                         .stream_name = "Analog Capture",
 325                         .channels_min = 2,
 326                         .channels_max = 2,
 327                         .rates = SNDRV_PCM_RATE_48000,
 328                         .formats = SNDRV_PCM_FMTBIT_S16_LE,
 329                 },
 330         },
 331 };
 332
 333 static int sst_byt_pcm_probe(struct snd_soc_component *component)
 334 {
 335         struct sst_pdata *plat_data = dev_get_platdata(component->dev);
 336         struct sst_byt_priv_data *priv_data;
 337         int i;
 338
 339         if (!plat_data)
 340                 return -ENODEV;
 341
 342         priv_data = devm_kzalloc(component->dev, sizeof(*priv_data),
 343                                  GFP_KERNEL);
 344         if (!priv_data)
 345                 return -ENOMEM;
 346         priv_data->byt = plat_data->dsp;
 347         snd_soc_component_set_drvdata(component, priv_data);
 348
 349         for (i = 0; i < BYT_PCM_COUNT; i++) {
 350                 mutex_init(&priv_data->pcm[i].mutex);
 351                 INIT_WORK(&priv_data->pcm[i].work, sst_byt_pcm_work);
 352         }
 353
 354         return 0;
 355 }
 356
 357 static const struct snd_soc_component_driver byt_dai_component = {
 358         .name           = DRV_NAME,
 359         .probe          = sst_byt_pcm_probe,
 360         .open           = sst_byt_pcm_open,
 361         .close          = sst_byt_pcm_close,
 362         .hw_params      = sst_byt_pcm_hw_params,
 363         .trigger        = sst_byt_pcm_trigger,
 364         .pointer        = sst_byt_pcm_pointer,
 365         .mmap           = sst_byt_pcm_mmap,
 366         .pcm_construct  = sst_byt_pcm_new,
 367 };
 368
 369 #ifdef CONFIG_PM
 370 static int sst_byt_pcm_dev_suspend_late(struct device *dev)
 371 {
 372         struct sst_pdata *sst_pdata = dev_get_platdata(dev);
 373         struct sst_byt_priv_data *priv_data = dev_get_drvdata(dev);
 374         int ret;
 375
 376         dev_dbg(dev, "suspending late\n");
 377
 378         ret = sst_byt_dsp_suspend_late(dev, sst_pdata);
 379         if (ret < 0) {
 380                 dev_err(dev, "failed to suspend %d\n", ret);
 381                 return ret;
 382         }
 383
 384         priv_data->restore_stream = true;
 385
 386         return ret;
 387 }
 388
 389 static int sst_byt_pcm_dev_resume_early(struct device *dev)
 390 {
 391         struct sst_pdata *sst_pdata = dev_get_platdata(dev);
 392         int ret;
 393
 394         dev_dbg(dev, "resume early\n");
 395
 396         /* load fw and boot DSP */
 397         ret = sst_byt_dsp_boot(dev, sst_pdata);
 398         if (ret)
 399                 return ret;
 400
 401         /* wait for FW to finish booting */
 402         return sst_byt_dsp_wait_for_ready(dev, sst_pdata);
 403 }
 404
 405 static const struct dev_pm_ops sst_byt_pm_ops = {
 406         .suspend_late = sst_byt_pcm_dev_suspend_late,
 407         .resume_early = sst_byt_pcm_dev_resume_early,
 408 };
 409
 410 #define SST_BYT_PM_OPS  (&sst_byt_pm_ops)
 411 #else
 412 #define SST_BYT_PM_OPS  NULL
 413 #endif
 414
 415 static int sst_byt_pcm_dev_probe(struct platform_device *pdev)
 416 {
 417         struct sst_pdata *sst_pdata = dev_get_platdata(&pdev->dev);
 418         int ret;
 419
 420         ret = sst_byt_dsp_init(&pdev->dev, sst_pdata);
 421         if (ret < 0)
 422                 return -ENODEV;
 423
 424         ret = devm_snd_soc_register_component(&pdev->dev, &byt_dai_component,
 425                                          byt_dais, ARRAY_SIZE(byt_dais));
 426         if (ret < 0)
 427                 goto err_plat;
 428
 429         return 0;
 430
 431 err_plat:
 432         sst_byt_dsp_free(&pdev->dev, sst_pdata);
 433         return ret;
 434 }
 435
 436 static int sst_byt_pcm_dev_remove(struct platform_device *pdev)
 437 {
 438         struct sst_pdata *sst_pdata = dev_get_platdata(&pdev->dev);
 439
 440         sst_byt_dsp_free(&pdev->dev, sst_pdata);
 441
 442         return 0;
 443 }
 444
 445 static struct platform_driver sst_byt_pcm_driver = {
 446         .driver = {
 447                 .name = "baytrail-pcm-audio",
 448                 .pm = SST_BYT_PM_OPS,
 449         },
 450
 451         .probe = sst_byt_pcm_dev_probe,
 452         .remove = sst_byt_pcm_dev_remove,
 453 };
 454 module_platform_driver(sst_byt_pcm_driver);
 455
 456 MODULE_AUTHOR("Jarkko Nikula");
 457 MODULE_DESCRIPTION("Baytrail PCM");
 458 MODULE_LICENSE("GPL v2");
 459 MODULE_ALIAS("platform:baytrail-pcm-audio");