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