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 = substream->private_data;
  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         snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(params));
 106
 107         ret = sst_byt_stream_buffer(byt, pcm_data->stream,
 108                                     substream->dma_buffer.addr,
 109                                     params_buffer_bytes(params));
 110         if (ret < 0) {
 111                 dev_err(rtd->dev, "PCM: failed to set DMA buffer %d\n", ret);
 112                 return ret;
 113         }
 114
 115         ret = sst_byt_stream_commit(byt, pcm_data->stream);
 116         if (ret < 0) {
 117                 dev_err(rtd->dev, "PCM: failed stream commit %d\n", ret);
 118                 return ret;
 119         }
 120
 121         return 0;
 122 }
 123
 124 static int sst_byt_pcm_hw_free(struct snd_soc_component *component,
 125                                struct snd_pcm_substream *substream)
 126 {
 127         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 128
 129         dev_dbg(rtd->dev, "PCM: hw_free\n");
 130         snd_pcm_lib_free_pages(substream);
 131
 132         return 0;
 133 }
 134
 135 static int sst_byt_pcm_restore_stream_context(struct snd_pcm_substream *substream)
 136 {
 137         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 138         struct snd_soc_component *component = snd_soc_rtdcom_lookup(rtd, DRV_NAME);
 139         struct sst_byt_priv_data *pdata = snd_soc_component_get_drvdata(component);
 140         struct sst_byt_pcm_data *pcm_data = &pdata->pcm[substream->stream];
 141         struct sst_byt *byt = pdata->byt;
 142         int ret;
 143
 144         /* commit stream using existing stream params */
 145         ret = sst_byt_stream_commit(byt, pcm_data->stream);
 146         if (ret < 0) {
 147                 dev_err(rtd->dev, "PCM: failed stream commit %d\n", ret);
 148                 return ret;
 149         }
 150
 151         sst_byt_stream_start(byt, pcm_data->stream, pcm_data->hw_ptr);
 152
 153         dev_dbg(rtd->dev, "stream context restored at offset %d\n",
 154                 pcm_data->hw_ptr);
 155
 156         return 0;
 157 }
 158
 159 static void sst_byt_pcm_work(struct work_struct *work)
 160 {
 161         struct sst_byt_pcm_data *pcm_data =
 162                 container_of(work, struct sst_byt_pcm_data, work);
 163
 164         if (snd_pcm_running(pcm_data->substream))
 165                 sst_byt_pcm_restore_stream_context(pcm_data->substream);
 166 }
 167
 168 static int sst_byt_pcm_trigger(struct snd_soc_component *component,
 169                                struct snd_pcm_substream *substream, int cmd)
 170 {
 171         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 172         struct sst_byt_priv_data *pdata = snd_soc_component_get_drvdata(component);
 173         struct sst_byt_pcm_data *pcm_data = &pdata->pcm[substream->stream];
 174         struct sst_byt *byt = pdata->byt;
 175
 176         dev_dbg(rtd->dev, "PCM: trigger %d\n", cmd);
 177
 178         switch (cmd) {
 179         case SNDRV_PCM_TRIGGER_START:
 180                 pcm_data->hw_ptr = 0;
 181                 sst_byt_stream_start(byt, pcm_data->stream, 0);
 182                 break;
 183         case SNDRV_PCM_TRIGGER_RESUME:
 184                 if (pdata->restore_stream)
 185                         schedule_work(&pcm_data->work);
 186                 else
 187                         sst_byt_stream_resume(byt, pcm_data->stream);
 188                 break;
 189         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
 190                 sst_byt_stream_resume(byt, pcm_data->stream);
 191                 break;
 192         case SNDRV_PCM_TRIGGER_STOP:
 193                 sst_byt_stream_stop(byt, pcm_data->stream);
 194                 break;
 195         case SNDRV_PCM_TRIGGER_SUSPEND:
 196                 pdata->restore_stream = false;
 197                 /* fallthrough */
 198         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
 199                 sst_byt_stream_pause(byt, pcm_data->stream);
 200                 break;
 201         default:
 202                 break;
 203         }
 204
 205         return 0;
 206 }
 207
 208 static u32 byt_notify_pointer(struct sst_byt_stream *stream, void *data)
 209 {
 210         struct sst_byt_pcm_data *pcm_data = data;
 211         struct snd_pcm_substream *substream = pcm_data->substream;
 212         struct snd_pcm_runtime *runtime = substream->runtime;
 213         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 214         struct snd_soc_component *component = snd_soc_rtdcom_lookup(rtd, DRV_NAME);
 215         struct sst_byt_priv_data *pdata = snd_soc_component_get_drvdata(component);
 216         struct sst_byt *byt = pdata->byt;
 217         u32 pos, hw_pos;
 218
 219         hw_pos = sst_byt_get_dsp_position(byt, pcm_data->stream,
 220                                           snd_pcm_lib_buffer_bytes(substream));
 221         pcm_data->hw_ptr = hw_pos;
 222         pos = frames_to_bytes(runtime,
 223                               (runtime->control->appl_ptr %
 224                                runtime->buffer_size));
 225
 226         dev_dbg(rtd->dev, "PCM: App/DMA pointer %u/%u bytes\n", pos, hw_pos);
 227
 228         snd_pcm_period_elapsed(substream);
 229         return pos;
 230 }
 231
 232 static snd_pcm_uframes_t sst_byt_pcm_pointer(struct snd_soc_component *component,
 233                                              struct snd_pcm_substream *substream)
 234 {
 235         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 236         struct snd_pcm_runtime *runtime = substream->runtime;
 237         struct sst_byt_priv_data *pdata = snd_soc_component_get_drvdata(component);
 238         struct sst_byt_pcm_data *pcm_data = &pdata->pcm[substream->stream];
 239
 240         dev_dbg(rtd->dev, "PCM: DMA pointer %u bytes\n", pcm_data->hw_ptr);
 241
 242         return bytes_to_frames(runtime, pcm_data->hw_ptr);
 243 }
 244
 245 static int sst_byt_pcm_open(struct snd_soc_component *component,
 246                             struct snd_pcm_substream *substream)
 247 {
 248         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 249         struct sst_byt_priv_data *pdata = snd_soc_component_get_drvdata(component);
 250         struct sst_byt_pcm_data *pcm_data = &pdata->pcm[substream->stream];
 251         struct sst_byt *byt = pdata->byt;
 252
 253         dev_dbg(rtd->dev, "PCM: open\n");
 254
 255         mutex_lock(&pcm_data->mutex);
 256
 257         pcm_data->substream = substream;
 258
 259         snd_soc_set_runtime_hwparams(substream, &sst_byt_pcm_hardware);
 260
 261         pcm_data->stream = sst_byt_stream_new(byt, substream->stream + 1,
 262                                               byt_notify_pointer, pcm_data);
 263         if (pcm_data->stream == NULL) {
 264                 dev_err(rtd->dev, "failed to create stream\n");
 265                 mutex_unlock(&pcm_data->mutex);
 266                 return -EINVAL;
 267         }
 268
 269         mutex_unlock(&pcm_data->mutex);
 270         return 0;
 271 }
 272
 273 static int sst_byt_pcm_close(struct snd_soc_component *component,
 274                              struct snd_pcm_substream *substream)
 275 {
 276         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 277         struct sst_byt_priv_data *pdata = snd_soc_component_get_drvdata(component);
 278         struct sst_byt_pcm_data *pcm_data = &pdata->pcm[substream->stream];
 279         struct sst_byt *byt = pdata->byt;
 280         int ret;
 281
 282         dev_dbg(rtd->dev, "PCM: close\n");
 283
 284         cancel_work_sync(&pcm_data->work);
 285         mutex_lock(&pcm_data->mutex);
 286         ret = sst_byt_stream_free(byt, pcm_data->stream);
 287         if (ret < 0) {
 288                 dev_dbg(rtd->dev, "Free stream fail\n");
 289                 goto out;
 290         }
 291         pcm_data->stream = NULL;
 292
 293 out:
 294         mutex_unlock(&pcm_data->mutex);
 295         return ret;
 296 }
 297
 298 static int sst_byt_pcm_mmap(struct snd_soc_component *component,
 299                             struct snd_pcm_substream *substream,
 300                             struct vm_area_struct *vma)
 301 {
 302         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 303
 304         dev_dbg(rtd->dev, "PCM: mmap\n");
 305         return snd_pcm_lib_default_mmap(substream, vma);
 306 }
 307
 308 static int sst_byt_pcm_new(struct snd_soc_component *component,
 309                            struct snd_soc_pcm_runtime *rtd)
 310 {
 311         struct snd_pcm *pcm = rtd->pcm;
 312         size_t size;
 313         struct sst_pdata *pdata = dev_get_platdata(component->dev);
 314
 315         if (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream ||
 316             pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream) {
 317                 size = sst_byt_pcm_hardware.buffer_bytes_max;
 318                 snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
 319                                                       pdata->dma_dev,
 320                                                       size, size);
 321         }
 322
 323         return 0;
 324 }
 325
 326 static struct snd_soc_dai_driver byt_dais[] = {
 327         {
 328                 .name  = "Baytrail PCM",
 329                 .playback = {
 330                         .stream_name = "System Playback",
 331                         .channels_min = 2,
 332                         .channels_max = 2,
 333                         .rates = SNDRV_PCM_RATE_48000,
 334                         .formats = SNDRV_PCM_FMTBIT_S24_3LE |
 335                                    SNDRV_PCM_FMTBIT_S16_LE,
 336                 },
 337                 .capture = {
 338                         .stream_name = "Analog Capture",
 339                         .channels_min = 2,
 340                         .channels_max = 2,
 341                         .rates = SNDRV_PCM_RATE_48000,
 342                         .formats = SNDRV_PCM_FMTBIT_S16_LE,
 343                 },
 344         },
 345 };
 346
 347 static int sst_byt_pcm_probe(struct snd_soc_component *component)
 348 {
 349         struct sst_pdata *plat_data = dev_get_platdata(component->dev);
 350         struct sst_byt_priv_data *priv_data;
 351         int i;
 352
 353         if (!plat_data)
 354                 return -ENODEV;
 355
 356         priv_data = devm_kzalloc(component->dev, sizeof(*priv_data),
 357                                  GFP_KERNEL);
 358         if (!priv_data)
 359                 return -ENOMEM;
 360         priv_data->byt = plat_data->dsp;
 361         snd_soc_component_set_drvdata(component, priv_data);
 362
 363         for (i = 0; i < BYT_PCM_COUNT; i++) {
 364                 mutex_init(&priv_data->pcm[i].mutex);
 365                 INIT_WORK(&priv_data->pcm[i].work, sst_byt_pcm_work);
 366         }
 367
 368         return 0;
 369 }
 370
 371 static const struct snd_soc_component_driver byt_dai_component = {
 372         .name           = DRV_NAME,
 373         .probe          = sst_byt_pcm_probe,
 374         .open           = sst_byt_pcm_open,
 375         .close          = sst_byt_pcm_close,
 376         .hw_params      = sst_byt_pcm_hw_params,
 377         .hw_free        = sst_byt_pcm_hw_free,
 378         .trigger        = sst_byt_pcm_trigger,
 379         .pointer        = sst_byt_pcm_pointer,
 380         .mmap           = sst_byt_pcm_mmap,
 381         .pcm_construct  = sst_byt_pcm_new,
 382 };
 383
 384 #ifdef CONFIG_PM
 385 static int sst_byt_pcm_dev_suspend_late(struct device *dev)
 386 {
 387         struct sst_pdata *sst_pdata = dev_get_platdata(dev);
 388         struct sst_byt_priv_data *priv_data = dev_get_drvdata(dev);
 389         int ret;
 390
 391         dev_dbg(dev, "suspending late\n");
 392
 393         ret = sst_byt_dsp_suspend_late(dev, sst_pdata);
 394         if (ret < 0) {
 395                 dev_err(dev, "failed to suspend %d\n", ret);
 396                 return ret;
 397         }
 398
 399         priv_data->restore_stream = true;
 400
 401         return ret;
 402 }
 403
 404 static int sst_byt_pcm_dev_resume_early(struct device *dev)
 405 {
 406         struct sst_pdata *sst_pdata = dev_get_platdata(dev);
 407         int ret;
 408
 409         dev_dbg(dev, "resume early\n");
 410
 411         /* load fw and boot DSP */
 412         ret = sst_byt_dsp_boot(dev, sst_pdata);
 413         if (ret)
 414                 return ret;
 415
 416         /* wait for FW to finish booting */
 417         return sst_byt_dsp_wait_for_ready(dev, sst_pdata);
 418 }
 419
 420 static const struct dev_pm_ops sst_byt_pm_ops = {
 421         .suspend_late = sst_byt_pcm_dev_suspend_late,
 422         .resume_early = sst_byt_pcm_dev_resume_early,
 423 };
 424
 425 #define SST_BYT_PM_OPS  (&sst_byt_pm_ops)
 426 #else
 427 #define SST_BYT_PM_OPS  NULL
 428 #endif
 429
 430 static int sst_byt_pcm_dev_probe(struct platform_device *pdev)
 431 {
 432         struct sst_pdata *sst_pdata = dev_get_platdata(&pdev->dev);
 433         int ret;
 434
 435         ret = sst_byt_dsp_init(&pdev->dev, sst_pdata);
 436         if (ret < 0)
 437                 return -ENODEV;
 438
 439         ret = devm_snd_soc_register_component(&pdev->dev, &byt_dai_component,
 440                                          byt_dais, ARRAY_SIZE(byt_dais));
 441         if (ret < 0)
 442                 goto err_plat;
 443
 444         return 0;
 445
 446 err_plat:
 447         sst_byt_dsp_free(&pdev->dev, sst_pdata);
 448         return ret;
 449 }
 450
 451 static int sst_byt_pcm_dev_remove(struct platform_device *pdev)
 452 {
 453         struct sst_pdata *sst_pdata = dev_get_platdata(&pdev->dev);
 454
 455         sst_byt_dsp_free(&pdev->dev, sst_pdata);
 456
 457         return 0;
 458 }
 459
 460 static struct platform_driver sst_byt_pcm_driver = {
 461         .driver = {
 462                 .name = "baytrail-pcm-audio",
 463                 .pm = SST_BYT_PM_OPS,
 464         },
 465
 466         .probe = sst_byt_pcm_dev_probe,
 467         .remove = sst_byt_pcm_dev_remove,
 468 };
 469 module_platform_driver(sst_byt_pcm_driver);
 470
 471 MODULE_AUTHOR("Jarkko Nikula");
 472 MODULE_DESCRIPTION("Baytrail PCM");
 473 MODULE_LICENSE("GPL v2");
 474 MODULE_ALIAS("platform:baytrail-pcm-audio");