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

   1 /*
   2  *  sst_mfld_platform.c - Intel MID Platform driver
   3  *
   4  *  Copyright (C) 2010-2013 Intel Corp
   5  *  Author: Vinod Koul <vinod.koul@intel.com>
   6  *  Author: Harsha Priya <priya.harsha@intel.com>
   7  *  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   8  *
   9  *  This program is free software; you can redistribute it and/or modify
  10  *  it under the terms of the GNU General Public License as published by
  11  *  the Free Software Foundation; version 2 of the License.
  12  *
  13  *  This program is distributed in the hope that it will be useful, but
  14  *  WITHOUT ANY WARRANTY; without even the implied warranty of
  15  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  *  General Public License for more details.
  17  *
  18  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  19  */
  20 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  21
  22 #include <linux/slab.h>
  23 #include <linux/io.h>
  24 #include <linux/module.h>
  25 #include <sound/core.h>
  26 #include <sound/pcm.h>
  27 #include <sound/pcm_params.h>
  28 #include <sound/soc.h>
  29 #include <sound/compress_driver.h>
  30 #include "sst-mfld-platform.h"
  31
  32 struct sst_device *sst;
  33 static DEFINE_MUTEX(sst_lock);
  34 extern struct snd_compr_ops sst_platform_compr_ops;
  35
  36 int sst_register_dsp(struct sst_device *dev)
  37 {
  38         if (WARN_ON(!dev))
  39                 return -EINVAL;
  40         if (!try_module_get(dev->dev->driver->owner))
  41                 return -ENODEV;
  42         mutex_lock(&sst_lock);
  43         if (sst) {
  44                 pr_err("we already have a device %s\n", sst->name);
  45                 module_put(dev->dev->driver->owner);
  46                 mutex_unlock(&sst_lock);
  47                 return -EEXIST;
  48         }
  49         pr_debug("registering device %s\n", dev->name);
  50         sst = dev;
  51         mutex_unlock(&sst_lock);
  52         return 0;
  53 }
  54 EXPORT_SYMBOL_GPL(sst_register_dsp);
  55
  56 int sst_unregister_dsp(struct sst_device *dev)
  57 {
  58         if (WARN_ON(!dev))
  59                 return -EINVAL;
  60         if (dev != sst)
  61                 return -EINVAL;
  62
  63         mutex_lock(&sst_lock);
  64
  65         if (!sst) {
  66                 mutex_unlock(&sst_lock);
  67                 return -EIO;
  68         }
  69
  70         module_put(sst->dev->driver->owner);
  71         pr_debug("unreg %s\n", sst->name);
  72         sst = NULL;
  73         mutex_unlock(&sst_lock);
  74         return 0;
  75 }
  76 EXPORT_SYMBOL_GPL(sst_unregister_dsp);
  77
  78 static struct snd_pcm_hardware sst_platform_pcm_hw = {
  79         .info = (SNDRV_PCM_INFO_INTERLEAVED |
  80                         SNDRV_PCM_INFO_DOUBLE |
  81                         SNDRV_PCM_INFO_PAUSE |
  82                         SNDRV_PCM_INFO_RESUME |
  83                         SNDRV_PCM_INFO_MMAP|
  84                         SNDRV_PCM_INFO_MMAP_VALID |
  85                         SNDRV_PCM_INFO_BLOCK_TRANSFER |
  86                         SNDRV_PCM_INFO_SYNC_START),
  87         .buffer_bytes_max = SST_MAX_BUFFER,
  88         .period_bytes_min = SST_MIN_PERIOD_BYTES,
  89         .period_bytes_max = SST_MAX_PERIOD_BYTES,
  90         .periods_min = SST_MIN_PERIODS,
  91         .periods_max = SST_MAX_PERIODS,
  92         .fifo_size = SST_FIFO_SIZE,
  93 };
  94
  95 /* MFLD - MSIC */
  96 static struct snd_soc_dai_driver sst_platform_dai[] = {
  97 {
  98         .name = "Headset-cpu-dai",
  99         .id = 0,
 100         .playback = {
 101                 .channels_min = SST_STEREO,
 102                 .channels_max = SST_STEREO,
 103                 .rates = SNDRV_PCM_RATE_48000,
 104                 .formats = SNDRV_PCM_FMTBIT_S24_LE,
 105         },
 106         .capture = {
 107                 .channels_min = 1,
 108                 .channels_max = 5,
 109                 .rates = SNDRV_PCM_RATE_48000,
 110                 .formats = SNDRV_PCM_FMTBIT_S24_LE,
 111         },
 112 },
 113 {
 114         .name = "Compress-cpu-dai",
 115         .compress_dai = 1,
 116         .playback = {
 117                 .channels_min = SST_STEREO,
 118                 .channels_max = SST_STEREO,
 119                 .rates = SNDRV_PCM_RATE_44100|SNDRV_PCM_RATE_48000,
 120                 .formats = SNDRV_PCM_FMTBIT_S16_LE,
 121         },
 122 },
 123 };
 124
 125 /* helper functions */
 126 void sst_set_stream_status(struct sst_runtime_stream *stream,
 127                                         int state)
 128 {
 129         unsigned long flags;
 130         spin_lock_irqsave(&stream->status_lock, flags);
 131         stream->stream_status = state;
 132         spin_unlock_irqrestore(&stream->status_lock, flags);
 133 }
 134
 135 static inline int sst_get_stream_status(struct sst_runtime_stream *stream)
 136 {
 137         int state;
 138         unsigned long flags;
 139
 140         spin_lock_irqsave(&stream->status_lock, flags);
 141         state = stream->stream_status;
 142         spin_unlock_irqrestore(&stream->status_lock, flags);
 143         return state;
 144 }
 145
 146 static void sst_fill_pcm_params(struct snd_pcm_substream *substream,
 147                                 struct sst_pcm_params *param)
 148 {
 149
 150         param->num_chan = (u8) substream->runtime->channels;
 151         param->pcm_wd_sz = substream->runtime->sample_bits;
 152         param->reserved = 0;
 153         param->sfreq = substream->runtime->rate;
 154         param->ring_buffer_size = snd_pcm_lib_buffer_bytes(substream);
 155         param->period_count = substream->runtime->period_size;
 156         param->ring_buffer_addr = virt_to_phys(substream->dma_buffer.area);
 157         pr_debug("period_cnt = %d\n", param->period_count);
 158         pr_debug("sfreq= %d, wd_sz = %d\n", param->sfreq, param->pcm_wd_sz);
 159 }
 160
 161 static int sst_platform_alloc_stream(struct snd_pcm_substream *substream)
 162 {
 163         struct sst_runtime_stream *stream =
 164                         substream->runtime->private_data;
 165         struct sst_pcm_params param = {0};
 166         struct sst_stream_params str_params = {0};
 167         int ret_val;
 168
 169         /* set codec params and inform SST driver the same */
 170         sst_fill_pcm_params(substream, &param);
 171         substream->runtime->dma_area = substream->dma_buffer.area;
 172         str_params.sparams = param;
 173         str_params.codec =  param.codec;
 174         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 175                 str_params.ops = STREAM_OPS_PLAYBACK;
 176                 str_params.device_type = substream->pcm->device + 1;
 177                 pr_debug("Playbck stream,Device %d\n",
 178                                         substream->pcm->device);
 179         } else {
 180                 str_params.ops = STREAM_OPS_CAPTURE;
 181                 str_params.device_type = SND_SST_DEVICE_CAPTURE;
 182                 pr_debug("Capture stream,Device %d\n",
 183                                         substream->pcm->device);
 184         }
 185         ret_val = stream->ops->open(&str_params);
 186         pr_debug("SST_SND_PLAY/CAPTURE ret_val = %x\n", ret_val);
 187         if (ret_val < 0)
 188                 return ret_val;
 189
 190         stream->stream_info.str_id = ret_val;
 191         pr_debug("str id :  %d\n", stream->stream_info.str_id);
 192         return ret_val;
 193 }
 194
 195 static void sst_period_elapsed(void *mad_substream)
 196 {
 197         struct snd_pcm_substream *substream = mad_substream;
 198         struct sst_runtime_stream *stream;
 199         int status;
 200
 201         if (!substream || !substream->runtime)
 202                 return;
 203         stream = substream->runtime->private_data;
 204         if (!stream)
 205                 return;
 206         status = sst_get_stream_status(stream);
 207         if (status != SST_PLATFORM_RUNNING)
 208                 return;
 209         snd_pcm_period_elapsed(substream);
 210 }
 211
 212 static int sst_platform_init_stream(struct snd_pcm_substream *substream)
 213 {
 214         struct sst_runtime_stream *stream =
 215                         substream->runtime->private_data;
 216         int ret_val;
 217
 218         pr_debug("setting buffer ptr param\n");
 219         sst_set_stream_status(stream, SST_PLATFORM_INIT);
 220         stream->stream_info.period_elapsed = sst_period_elapsed;
 221         stream->stream_info.mad_substream = substream;
 222         stream->stream_info.buffer_ptr = 0;
 223         stream->stream_info.sfreq = substream->runtime->rate;
 224         ret_val = stream->ops->device_control(
 225                         SST_SND_STREAM_INIT, &stream->stream_info);
 226         if (ret_val)
 227                 pr_err("control_set ret error %d\n", ret_val);
 228         return ret_val;
 229
 230 }
 231 /* end -- helper functions */
 232
 233 static int sst_platform_open(struct snd_pcm_substream *substream)
 234 {
 235         struct snd_pcm_runtime *runtime = substream->runtime;
 236         struct sst_runtime_stream *stream;
 237         int ret_val;
 238
 239         pr_debug("sst_platform_open called\n");
 240
 241         snd_soc_set_runtime_hwparams(substream, &sst_platform_pcm_hw);
 242         ret_val = snd_pcm_hw_constraint_integer(runtime,
 243                                                 SNDRV_PCM_HW_PARAM_PERIODS);
 244         if (ret_val < 0)
 245                 return ret_val;
 246
 247         stream = kzalloc(sizeof(*stream), GFP_KERNEL);
 248         if (!stream)
 249                 return -ENOMEM;
 250         spin_lock_init(&stream->status_lock);
 251
 252         /* get the sst ops */
 253         mutex_lock(&sst_lock);
 254         if (!sst) {
 255                 pr_err("no device available to run\n");
 256                 mutex_unlock(&sst_lock);
 257                 kfree(stream);
 258                 return -ENODEV;
 259         }
 260         if (!try_module_get(sst->dev->driver->owner)) {
 261                 mutex_unlock(&sst_lock);
 262                 kfree(stream);
 263                 return -ENODEV;
 264         }
 265         stream->ops = sst->ops;
 266         mutex_unlock(&sst_lock);
 267
 268         stream->stream_info.str_id = 0;
 269         sst_set_stream_status(stream, SST_PLATFORM_INIT);
 270         stream->stream_info.mad_substream = substream;
 271         /* allocate memory for SST API set */
 272         runtime->private_data = stream;
 273
 274         return 0;
 275 }
 276
 277 static int sst_platform_close(struct snd_pcm_substream *substream)
 278 {
 279         struct sst_runtime_stream *stream;
 280         int ret_val = 0, str_id;
 281
 282         pr_debug("sst_platform_close called\n");
 283         stream = substream->runtime->private_data;
 284         str_id = stream->stream_info.str_id;
 285         if (str_id)
 286                 ret_val = stream->ops->close(str_id);
 287         module_put(sst->dev->driver->owner);
 288         kfree(stream);
 289         return ret_val;
 290 }
 291
 292 static int sst_platform_pcm_prepare(struct snd_pcm_substream *substream)
 293 {
 294         struct sst_runtime_stream *stream;
 295         int ret_val = 0, str_id;
 296
 297         pr_debug("sst_platform_pcm_prepare called\n");
 298         stream = substream->runtime->private_data;
 299         str_id = stream->stream_info.str_id;
 300         if (stream->stream_info.str_id) {
 301                 ret_val = stream->ops->device_control(
 302                                 SST_SND_DROP, &str_id);
 303                 return ret_val;
 304         }
 305
 306         ret_val = sst_platform_alloc_stream(substream);
 307         if (ret_val < 0)
 308                 return ret_val;
 309         snprintf(substream->pcm->id, sizeof(substream->pcm->id),
 310                         "%d", stream->stream_info.str_id);
 311
 312         ret_val = sst_platform_init_stream(substream);
 313         if (ret_val)
 314                 return ret_val;
 315         substream->runtime->hw.info = SNDRV_PCM_INFO_BLOCK_TRANSFER;
 316         return ret_val;
 317 }
 318
 319 static int sst_platform_pcm_trigger(struct snd_pcm_substream *substream,
 320                                         int cmd)
 321 {
 322         int ret_val = 0, str_id;
 323         struct sst_runtime_stream *stream;
 324         int str_cmd, status;
 325
 326         pr_debug("sst_platform_pcm_trigger called\n");
 327         stream = substream->runtime->private_data;
 328         str_id = stream->stream_info.str_id;
 329         switch (cmd) {
 330         case SNDRV_PCM_TRIGGER_START:
 331                 pr_debug("sst: Trigger Start\n");
 332                 str_cmd = SST_SND_START;
 333                 status = SST_PLATFORM_RUNNING;
 334                 stream->stream_info.mad_substream = substream;
 335                 break;
 336         case SNDRV_PCM_TRIGGER_STOP:
 337                 pr_debug("sst: in stop\n");
 338                 str_cmd = SST_SND_DROP;
 339                 status = SST_PLATFORM_DROPPED;
 340                 break;
 341         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
 342                 pr_debug("sst: in pause\n");
 343                 str_cmd = SST_SND_PAUSE;
 344                 status = SST_PLATFORM_PAUSED;
 345                 break;
 346         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
 347                 pr_debug("sst: in pause release\n");
 348                 str_cmd = SST_SND_RESUME;
 349                 status = SST_PLATFORM_RUNNING;
 350                 break;
 351         default:
 352                 return -EINVAL;
 353         }
 354         ret_val = stream->ops->device_control(str_cmd, &str_id);
 355         if (!ret_val)
 356                 sst_set_stream_status(stream, status);
 357
 358         return ret_val;
 359 }
 360
 361
 362 static snd_pcm_uframes_t sst_platform_pcm_pointer
 363                         (struct snd_pcm_substream *substream)
 364 {
 365         struct sst_runtime_stream *stream;
 366         int ret_val, status;
 367         struct pcm_stream_info *str_info;
 368
 369         stream = substream->runtime->private_data;
 370         status = sst_get_stream_status(stream);
 371         if (status == SST_PLATFORM_INIT)
 372                 return 0;
 373         str_info = &stream->stream_info;
 374         ret_val = stream->ops->device_control(
 375                                 SST_SND_BUFFER_POINTER, str_info);
 376         if (ret_val) {
 377                 pr_err("sst: error code = %d\n", ret_val);
 378                 return ret_val;
 379         }
 380         return stream->stream_info.buffer_ptr;
 381 }
 382
 383 static int sst_platform_pcm_hw_params(struct snd_pcm_substream *substream,
 384                 struct snd_pcm_hw_params *params)
 385 {
 386         snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(params));
 387         memset(substream->runtime->dma_area, 0, params_buffer_bytes(params));
 388
 389         return 0;
 390 }
 391
 392 static int sst_platform_pcm_hw_free(struct snd_pcm_substream *substream)
 393 {
 394         return snd_pcm_lib_free_pages(substream);
 395 }
 396
 397 static struct snd_pcm_ops sst_platform_ops = {
 398         .open = sst_platform_open,
 399         .close = sst_platform_close,
 400         .ioctl = snd_pcm_lib_ioctl,
 401         .prepare = sst_platform_pcm_prepare,
 402         .trigger = sst_platform_pcm_trigger,
 403         .pointer = sst_platform_pcm_pointer,
 404         .hw_params = sst_platform_pcm_hw_params,
 405         .hw_free = sst_platform_pcm_hw_free,
 406 };
 407
 408 static void sst_pcm_free(struct snd_pcm *pcm)
 409 {
 410         pr_debug("sst_pcm_free called\n");
 411         snd_pcm_lib_preallocate_free_for_all(pcm);
 412 }
 413
 414 static int sst_pcm_new(struct snd_soc_pcm_runtime *rtd)
 415 {
 416         struct snd_pcm *pcm = rtd->pcm;
 417         int retval = 0;
 418
 419         pr_debug("sst_pcm_new called\n");
 420         if (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream ||
 421                         pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream) {
 422                 retval =  snd_pcm_lib_preallocate_pages_for_all(pcm,
 423                         SNDRV_DMA_TYPE_CONTINUOUS,
 424                         snd_dma_continuous_data(GFP_KERNEL),
 425                         SST_MIN_BUFFER, SST_MAX_BUFFER);
 426                 if (retval) {
 427                         pr_err("dma buffer allocationf fail\n");
 428                         return retval;
 429                 }
 430         }
 431         return retval;
 432 }
 433
 434 static struct snd_soc_platform_driver sst_soc_platform_drv = {
 435         .ops            = &sst_platform_ops,
 436         .compr_ops      = &sst_platform_compr_ops,
 437         .pcm_new        = sst_pcm_new,
 438         .pcm_free       = sst_pcm_free,
 439 };
 440
 441 static const struct snd_soc_component_driver sst_component = {
 442         .name           = "sst",
 443 };
 444
 445
 446 static int sst_platform_probe(struct platform_device *pdev)
 447 {
 448         int ret;
 449
 450         pr_debug("sst_platform_probe called\n");
 451         sst = NULL;
 452         ret = snd_soc_register_platform(&pdev->dev, &sst_soc_platform_drv);
 453         if (ret) {
 454                 pr_err("registering soc platform failed\n");
 455                 return ret;
 456         }
 457
 458         ret = snd_soc_register_component(&pdev->dev, &sst_component,
 459                                 sst_platform_dai, ARRAY_SIZE(sst_platform_dai));
 460         if (ret) {
 461                 pr_err("registering cpu dais failed\n");
 462                 snd_soc_unregister_platform(&pdev->dev);
 463         }
 464         return ret;
 465 }
 466
 467 static int sst_platform_remove(struct platform_device *pdev)
 468 {
 469
 470         snd_soc_unregister_component(&pdev->dev);
 471         snd_soc_unregister_platform(&pdev->dev);
 472         pr_debug("sst_platform_remove success\n");
 473         return 0;
 474 }
 475
 476 static struct platform_driver sst_platform_driver = {
 477         .driver         = {
 478                 .name           = "sst-mfld-platform",
 479                 .owner          = THIS_MODULE,
 480         },
 481         .probe          = sst_platform_probe,
 482         .remove         = sst_platform_remove,
 483 };
 484
 485 module_platform_driver(sst_platform_driver);
 486
 487 MODULE_DESCRIPTION("ASoC Intel(R) MID Platform driver");
 488 MODULE_AUTHOR("Vinod Koul <vinod.koul@intel.com>");
 489 MODULE_AUTHOR("Harsha Priya <priya.harsha@intel.com>");
 490 MODULE_LICENSE("GPL v2");
 491 MODULE_ALIAS("platform:sst-mfld-platform");