sound/soc/mid-x86/sst_platform.c

   1 /*
   2  *  sst_platform.c - Intel MID Platform driver
   3  *
   4  *  Copyright (C) 2010 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  *  You should have received a copy of the GNU General Public License along
  19  *  with this program; if not, write to the Free Software Foundation, Inc.,
  20  *  59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
  21  *
  22  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  23  *
  24  *
  25  */
  26 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  27
  28 #include <linux/slab.h>
  29 #include <linux/io.h>
  30 #include <linux/module.h>
  31 #include <sound/core.h>
  32 #include <sound/pcm.h>
  33 #include <sound/pcm_params.h>
  34 #include <sound/soc.h>
  35 #include "sst_platform.h"
  36
  37 static struct sst_device *sst;
  38 static DEFINE_MUTEX(sst_lock);
  39
  40 int sst_register_dsp(struct sst_device *dev)
  41 {
  42         BUG_ON(!dev);
  43         if (!try_module_get(dev->dev->driver->owner))
  44                 return -ENODEV;
  45         mutex_lock(&sst_lock);
  46         if (sst) {
  47                 pr_err("we already have a device %s\n", sst->name);
  48                 module_put(dev->dev->driver->owner);
  49                 mutex_unlock(&sst_lock);
  50                 return -EEXIST;
  51         }
  52         pr_debug("registering device %s\n", dev->name);
  53         sst = dev;
  54         mutex_unlock(&sst_lock);
  55         return 0;
  56 }
  57 EXPORT_SYMBOL_GPL(sst_register_dsp);
  58
  59 int sst_unregister_dsp(struct sst_device *dev)
  60 {
  61         BUG_ON(!dev);
  62         if (dev != sst)
  63                 return -EINVAL;
  64
  65         mutex_lock(&sst_lock);
  66
  67         if (!sst) {
  68                 mutex_unlock(&sst_lock);
  69                 return -EIO;
  70         }
  71
  72         module_put(sst->dev->driver->owner);
  73         pr_debug("unreg %s\n", sst->name);
  74         sst = NULL;
  75         mutex_unlock(&sst_lock);
  76         return 0;
  77 }
  78 EXPORT_SYMBOL_GPL(sst_unregister_dsp);
  79
  80 static struct snd_pcm_hardware sst_platform_pcm_hw = {
  81         .info = (SNDRV_PCM_INFO_INTERLEAVED |
  82                         SNDRV_PCM_INFO_DOUBLE |
  83                         SNDRV_PCM_INFO_PAUSE |
  84                         SNDRV_PCM_INFO_RESUME |
  85                         SNDRV_PCM_INFO_MMAP|
  86                         SNDRV_PCM_INFO_MMAP_VALID |
  87                         SNDRV_PCM_INFO_BLOCK_TRANSFER |
  88                         SNDRV_PCM_INFO_SYNC_START),
  89         .formats = (SNDRV_PCM_FMTBIT_S16 | SNDRV_PCM_FMTBIT_U16 |
  90                         SNDRV_PCM_FMTBIT_S24 | SNDRV_PCM_FMTBIT_U24 |
  91                         SNDRV_PCM_FMTBIT_S32 | SNDRV_PCM_FMTBIT_U32),
  92         .rates = (SNDRV_PCM_RATE_8000|
  93                         SNDRV_PCM_RATE_44100 |
  94                         SNDRV_PCM_RATE_48000),
  95         .rate_min = SST_MIN_RATE,
  96         .rate_max = SST_MAX_RATE,
  97         .channels_min = SST_MIN_CHANNEL,
  98         .channels_max = SST_MAX_CHANNEL,
  99         .buffer_bytes_max = SST_MAX_BUFFER,
 100         .period_bytes_min = SST_MIN_PERIOD_BYTES,
 101         .period_bytes_max = SST_MAX_PERIOD_BYTES,
 102         .periods_min = SST_MIN_PERIODS,
 103         .periods_max = SST_MAX_PERIODS,
 104         .fifo_size = SST_FIFO_SIZE,
 105 };
 106
 107 /* MFLD - MSIC */
 108 static struct snd_soc_dai_driver sst_platform_dai[] = {
 109 {
 110         .name = "Headset-cpu-dai",
 111         .id = 0,
 112         .playback = {
 113                 .channels_min = SST_STEREO,
 114                 .channels_max = SST_STEREO,
 115                 .rates = SNDRV_PCM_RATE_48000,
 116                 .formats = SNDRV_PCM_FMTBIT_S24_LE,
 117         },
 118         .capture = {
 119                 .channels_min = 1,
 120                 .channels_max = 5,
 121                 .rates = SNDRV_PCM_RATE_48000,
 122                 .formats = SNDRV_PCM_FMTBIT_S24_LE,
 123         },
 124 },
 125 {
 126         .name = "Speaker-cpu-dai",
 127         .id = 1,
 128         .playback = {
 129                 .channels_min = SST_MONO,
 130                 .channels_max = SST_STEREO,
 131                 .rates = SNDRV_PCM_RATE_48000,
 132                 .formats = SNDRV_PCM_FMTBIT_S24_LE,
 133         },
 134 },
 135 {
 136         .name = "Vibra1-cpu-dai",
 137         .id = 2,
 138         .playback = {
 139                 .channels_min = SST_MONO,
 140                 .channels_max = SST_MONO,
 141                 .rates = SNDRV_PCM_RATE_48000,
 142                 .formats = SNDRV_PCM_FMTBIT_S24_LE,
 143         },
 144 },
 145 {
 146         .name = "Vibra2-cpu-dai",
 147         .id = 3,
 148         .playback = {
 149                 .channels_min = SST_MONO,
 150                 .channels_max = SST_STEREO,
 151                 .rates = SNDRV_PCM_RATE_48000,
 152                 .formats = SNDRV_PCM_FMTBIT_S24_LE,
 153         },
 154 },
 155 };
 156
 157 /* helper functions */
 158 static inline void sst_set_stream_status(struct sst_runtime_stream *stream,
 159                                         int state)
 160 {
 161         unsigned long flags;
 162         spin_lock_irqsave(&stream->status_lock, flags);
 163         stream->stream_status = state;
 164         spin_unlock_irqrestore(&stream->status_lock, flags);
 165 }
 166
 167 static inline int sst_get_stream_status(struct sst_runtime_stream *stream)
 168 {
 169         int state;
 170         unsigned long flags;
 171
 172         spin_lock_irqsave(&stream->status_lock, flags);
 173         state = stream->stream_status;
 174         spin_unlock_irqrestore(&stream->status_lock, flags);
 175         return state;
 176 }
 177
 178 static void sst_fill_pcm_params(struct snd_pcm_substream *substream,
 179                                 struct sst_pcm_params *param)
 180 {
 181
 182         param->codec = SST_CODEC_TYPE_PCM;
 183         param->num_chan = (u8) substream->runtime->channels;
 184         param->pcm_wd_sz = substream->runtime->sample_bits;
 185         param->reserved = 0;
 186         param->sfreq = substream->runtime->rate;
 187         param->ring_buffer_size = snd_pcm_lib_buffer_bytes(substream);
 188         param->period_count = substream->runtime->period_size;
 189         param->ring_buffer_addr = virt_to_phys(substream->dma_buffer.area);
 190         pr_debug("period_cnt = %d\n", param->period_count);
 191         pr_debug("sfreq= %d, wd_sz = %d\n", param->sfreq, param->pcm_wd_sz);
 192 }
 193
 194 static int sst_platform_alloc_stream(struct snd_pcm_substream *substream)
 195 {
 196         struct sst_runtime_stream *stream =
 197                         substream->runtime->private_data;
 198         struct sst_pcm_params param = {0};
 199         struct sst_stream_params str_params = {0};
 200         int ret_val;
 201
 202         /* set codec params and inform SST driver the same */
 203         sst_fill_pcm_params(substream, &param);
 204         substream->runtime->dma_area = substream->dma_buffer.area;
 205         str_params.sparams = param;
 206         str_params.codec =  param.codec;
 207         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 208                 str_params.ops = STREAM_OPS_PLAYBACK;
 209                 str_params.device_type = substream->pcm->device + 1;
 210                 pr_debug("Playbck stream,Device %d\n",
 211                                         substream->pcm->device);
 212         } else {
 213                 str_params.ops = STREAM_OPS_CAPTURE;
 214                 str_params.device_type = SND_SST_DEVICE_CAPTURE;
 215                 pr_debug("Capture stream,Device %d\n",
 216                                         substream->pcm->device);
 217         }
 218         ret_val = stream->ops->open(&str_params);
 219         pr_debug("SST_SND_PLAY/CAPTURE ret_val = %x\n", ret_val);
 220         if (ret_val < 0)
 221                 return ret_val;
 222
 223         stream->stream_info.str_id = ret_val;
 224         pr_debug("str id :  %d\n", stream->stream_info.str_id);
 225         return ret_val;
 226 }
 227
 228 static void sst_period_elapsed(void *mad_substream)
 229 {
 230         struct snd_pcm_substream *substream = mad_substream;
 231         struct sst_runtime_stream *stream;
 232         int status;
 233
 234         if (!substream || !substream->runtime)
 235                 return;
 236         stream = substream->runtime->private_data;
 237         if (!stream)
 238                 return;
 239         status = sst_get_stream_status(stream);
 240         if (status != SST_PLATFORM_RUNNING)
 241                 return;
 242         snd_pcm_period_elapsed(substream);
 243 }
 244
 245 static int sst_platform_init_stream(struct snd_pcm_substream *substream)
 246 {
 247         struct sst_runtime_stream *stream =
 248                         substream->runtime->private_data;
 249         int ret_val;
 250
 251         pr_debug("setting buffer ptr param\n");
 252         sst_set_stream_status(stream, SST_PLATFORM_INIT);
 253         stream->stream_info.period_elapsed = sst_period_elapsed;
 254         stream->stream_info.mad_substream = substream;
 255         stream->stream_info.buffer_ptr = 0;
 256         stream->stream_info.sfreq = substream->runtime->rate;
 257         ret_val = stream->ops->device_control(
 258                         SST_SND_STREAM_INIT, &stream->stream_info);
 259         if (ret_val)
 260                 pr_err("control_set ret error %d\n", ret_val);
 261         return ret_val;
 262
 263 }
 264 /* end -- helper functions */
 265
 266 static int sst_platform_open(struct snd_pcm_substream *substream)
 267 {
 268         struct snd_pcm_runtime *runtime = substream->runtime;
 269         struct sst_runtime_stream *stream;
 270         int ret_val;
 271
 272         pr_debug("sst_platform_open called\n");
 273
 274         snd_soc_set_runtime_hwparams(substream, &sst_platform_pcm_hw);
 275         ret_val = snd_pcm_hw_constraint_integer(runtime,
 276                                                 SNDRV_PCM_HW_PARAM_PERIODS);
 277         if (ret_val < 0)
 278                 return ret_val;
 279
 280         stream = kzalloc(sizeof(*stream), GFP_KERNEL);
 281         if (!stream)
 282                 return -ENOMEM;
 283         spin_lock_init(&stream->status_lock);
 284
 285         /* get the sst ops */
 286         mutex_lock(&sst_lock);
 287         if (!sst) {
 288                 pr_err("no device available to run\n");
 289                 mutex_unlock(&sst_lock);
 290                 kfree(stream);
 291                 return -ENODEV;
 292         }
 293         if (!try_module_get(sst->dev->driver->owner)) {
 294                 mutex_unlock(&sst_lock);
 295                 kfree(stream);
 296                 return -ENODEV;
 297         }
 298         stream->ops = sst->ops;
 299         mutex_unlock(&sst_lock);
 300
 301         stream->stream_info.str_id = 0;
 302         sst_set_stream_status(stream, SST_PLATFORM_INIT);
 303         stream->stream_info.mad_substream = substream;
 304         /* allocate memory for SST API set */
 305         runtime->private_data = stream;
 306
 307         return 0;
 308 }
 309
 310 static int sst_platform_close(struct snd_pcm_substream *substream)
 311 {
 312         struct sst_runtime_stream *stream;
 313         int ret_val = 0, str_id;
 314
 315         pr_debug("sst_platform_close called\n");
 316         stream = substream->runtime->private_data;
 317         str_id = stream->stream_info.str_id;
 318         if (str_id)
 319                 ret_val = stream->ops->close(str_id);
 320         module_put(sst->dev->driver->owner);
 321         kfree(stream);
 322         return ret_val;
 323 }
 324
 325 static int sst_platform_pcm_prepare(struct snd_pcm_substream *substream)
 326 {
 327         struct sst_runtime_stream *stream;
 328         int ret_val = 0, str_id;
 329
 330         pr_debug("sst_platform_pcm_prepare called\n");
 331         stream = substream->runtime->private_data;
 332         str_id = stream->stream_info.str_id;
 333         if (stream->stream_info.str_id) {
 334                 ret_val = stream->ops->device_control(
 335                                 SST_SND_DROP, &str_id);
 336                 return ret_val;
 337         }
 338
 339         ret_val = sst_platform_alloc_stream(substream);
 340         if (ret_val < 0)
 341                 return ret_val;
 342         snprintf(substream->pcm->id, sizeof(substream->pcm->id),
 343                         "%d", stream->stream_info.str_id);
 344
 345         ret_val = sst_platform_init_stream(substream);
 346         if (ret_val)
 347                 return ret_val;
 348         substream->runtime->hw.info = SNDRV_PCM_INFO_BLOCK_TRANSFER;
 349         return ret_val;
 350 }
 351
 352 static int sst_platform_pcm_trigger(struct snd_pcm_substream *substream,
 353                                         int cmd)
 354 {
 355         int ret_val = 0, str_id;
 356         struct sst_runtime_stream *stream;
 357         int str_cmd, status;
 358
 359         pr_debug("sst_platform_pcm_trigger called\n");
 360         stream = substream->runtime->private_data;
 361         str_id = stream->stream_info.str_id;
 362         switch (cmd) {
 363         case SNDRV_PCM_TRIGGER_START:
 364                 pr_debug("sst: Trigger Start\n");
 365                 str_cmd = SST_SND_START;
 366                 status = SST_PLATFORM_RUNNING;
 367                 stream->stream_info.mad_substream = substream;
 368                 break;
 369         case SNDRV_PCM_TRIGGER_STOP:
 370                 pr_debug("sst: in stop\n");
 371                 str_cmd = SST_SND_DROP;
 372                 status = SST_PLATFORM_DROPPED;
 373                 break;
 374         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
 375                 pr_debug("sst: in pause\n");
 376                 str_cmd = SST_SND_PAUSE;
 377                 status = SST_PLATFORM_PAUSED;
 378                 break;
 379         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
 380                 pr_debug("sst: in pause release\n");
 381                 str_cmd = SST_SND_RESUME;
 382                 status = SST_PLATFORM_RUNNING;
 383                 break;
 384         default:
 385                 return -EINVAL;
 386         }
 387         ret_val = stream->ops->device_control(str_cmd, &str_id);
 388         if (!ret_val)
 389                 sst_set_stream_status(stream, status);
 390
 391         return ret_val;
 392 }
 393
 394
 395 static snd_pcm_uframes_t sst_platform_pcm_pointer
 396                         (struct snd_pcm_substream *substream)
 397 {
 398         struct sst_runtime_stream *stream;
 399         int ret_val, status;
 400         struct pcm_stream_info *str_info;
 401
 402         stream = substream->runtime->private_data;
 403         status = sst_get_stream_status(stream);
 404         if (status == SST_PLATFORM_INIT)
 405                 return 0;
 406         str_info = &stream->stream_info;
 407         ret_val = stream->ops->device_control(
 408                                 SST_SND_BUFFER_POINTER, str_info);
 409         if (ret_val) {
 410                 pr_err("sst: error code = %d\n", ret_val);
 411                 return ret_val;
 412         }
 413         return stream->stream_info.buffer_ptr;
 414 }
 415
 416 static int sst_platform_pcm_hw_params(struct snd_pcm_substream *substream,
 417                 struct snd_pcm_hw_params *params)
 418 {
 419         snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(params));
 420         memset(substream->runtime->dma_area, 0, params_buffer_bytes(params));
 421
 422         return 0;
 423 }
 424
 425 static int sst_platform_pcm_hw_free(struct snd_pcm_substream *substream)
 426 {
 427         return snd_pcm_lib_free_pages(substream);
 428 }
 429
 430 static struct snd_pcm_ops sst_platform_ops = {
 431         .open = sst_platform_open,
 432         .close = sst_platform_close,
 433         .ioctl = snd_pcm_lib_ioctl,
 434         .prepare = sst_platform_pcm_prepare,
 435         .trigger = sst_platform_pcm_trigger,
 436         .pointer = sst_platform_pcm_pointer,
 437         .hw_params = sst_platform_pcm_hw_params,
 438         .hw_free = sst_platform_pcm_hw_free,
 439 };
 440
 441 static void sst_pcm_free(struct snd_pcm *pcm)
 442 {
 443         pr_debug("sst_pcm_free called\n");
 444         snd_pcm_lib_preallocate_free_for_all(pcm);
 445 }
 446
 447 static int sst_pcm_new(struct snd_soc_pcm_runtime *rtd)
 448 {
 449         struct snd_soc_dai *dai = rtd->cpu_dai;
 450         struct snd_pcm *pcm = rtd->pcm;
 451         int retval = 0;
 452
 453         pr_debug("sst_pcm_new called\n");
 454         if (dai->driver->playback.channels_min ||
 455                         dai->driver->capture.channels_min) {
 456                 retval =  snd_pcm_lib_preallocate_pages_for_all(pcm,
 457                         SNDRV_DMA_TYPE_CONTINUOUS,
 458                         snd_dma_continuous_data(GFP_KERNEL),
 459                         SST_MIN_BUFFER, SST_MAX_BUFFER);
 460                 if (retval) {
 461                         pr_err("dma buffer allocationf fail\n");
 462                         return retval;
 463                 }
 464         }
 465         return retval;
 466 }
 467 static struct snd_soc_platform_driver sst_soc_platform_drv = {
 468         .ops            = &sst_platform_ops,
 469         .pcm_new        = sst_pcm_new,
 470         .pcm_free       = sst_pcm_free,
 471 };
 472
 473 static int sst_platform_probe(struct platform_device *pdev)
 474 {
 475         int ret;
 476
 477         pr_debug("sst_platform_probe called\n");
 478         sst = NULL;
 479         ret = snd_soc_register_platform(&pdev->dev, &sst_soc_platform_drv);
 480         if (ret) {
 481                 pr_err("registering soc platform failed\n");
 482                 return ret;
 483         }
 484
 485         ret = snd_soc_register_dais(&pdev->dev,
 486                                 sst_platform_dai, ARRAY_SIZE(sst_platform_dai));
 487         if (ret) {
 488                 pr_err("registering cpu dais failed\n");
 489                 snd_soc_unregister_platform(&pdev->dev);
 490         }
 491         return ret;
 492 }
 493
 494 static int sst_platform_remove(struct platform_device *pdev)
 495 {
 496
 497         snd_soc_unregister_dais(&pdev->dev, ARRAY_SIZE(sst_platform_dai));
 498         snd_soc_unregister_platform(&pdev->dev);
 499         pr_debug("sst_platform_remove success\n");
 500         return 0;
 501 }
 502
 503 static struct platform_driver sst_platform_driver = {
 504         .driver         = {
 505                 .name           = "sst-platform",
 506                 .owner          = THIS_MODULE,
 507         },
 508         .probe          = sst_platform_probe,
 509         .remove         = sst_platform_remove,
 510 };
 511
 512 module_platform_driver(sst_platform_driver);
 513
 514 MODULE_DESCRIPTION("ASoC Intel(R) MID Platform driver");
 515 MODULE_AUTHOR("Vinod Koul <vinod.koul@intel.com>");
 516 MODULE_AUTHOR("Harsha Priya <priya.harsha@intel.com>");
 517 MODULE_LICENSE("GPL v2");
 518 MODULE_ALIAS("platform:sst-platform");