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         unsigned long flags;
 120         spin_lock_irqsave(&stream->status_lock, flags);
 121         stream->stream_status = state;
 122         spin_unlock_irqrestore(&stream->status_lock, flags);
 123 }
 124
 125 static inline int sst_get_stream_status(struct sst_runtime_stream *stream)
 126 {
 127         int state;
 128         unsigned long flags;
 129
 130         spin_lock_irqsave(&stream->status_lock, flags);
 131         state = stream->stream_status;
 132         spin_unlock_irqrestore(&stream->status_lock, flags);
 133         return state;
 134 }
 135
 136 static void sst_fill_pcm_params(struct snd_pcm_substream *substream,
 137                                 struct snd_sst_stream_params *param)
 138 {
 139
 140         param->uc.pcm_params.codec = SST_CODEC_TYPE_PCM;
 141         param->uc.pcm_params.num_chan = (u8) substream->runtime->channels;
 142         param->uc.pcm_params.pcm_wd_sz = substream->runtime->sample_bits;
 143         param->uc.pcm_params.reserved = 0;
 144         param->uc.pcm_params.sfreq = substream->runtime->rate;
 145         param->uc.pcm_params.ring_buffer_size =
 146                                         snd_pcm_lib_buffer_bytes(substream);
 147         param->uc.pcm_params.period_count = substream->runtime->period_size;
 148         param->uc.pcm_params.ring_buffer_addr =
 149                                 virt_to_phys(substream->dma_buffer.area);
 150         pr_debug("period_cnt = %d\n", param->uc.pcm_params.period_count);
 151         pr_debug("sfreq= %d, wd_sz = %d\n",
 152                  param->uc.pcm_params.sfreq, param->uc.pcm_params.pcm_wd_sz);
 153 }
 154
 155 static int sst_platform_alloc_stream(struct snd_pcm_substream *substream)
 156 {
 157         struct sst_runtime_stream *stream =
 158                         substream->runtime->private_data;
 159         struct snd_sst_stream_params param = {{{0,},},};
 160         struct snd_sst_params str_params = {0};
 161         int ret_val;
 162
 163         /* set codec params and inform SST driver the same */
 164         sst_fill_pcm_params(substream, &param);
 165         substream->runtime->dma_area = substream->dma_buffer.area;
 166         str_params.sparams = param;
 167         str_params.codec =  param.uc.pcm_params.codec;
 168         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 169                 str_params.ops = STREAM_OPS_PLAYBACK;
 170                 str_params.device_type = substream->pcm->device + 1;
 171                 pr_debug("Playbck stream,Device %d\n",
 172                                         substream->pcm->device);
 173         } else {
 174                 str_params.ops = STREAM_OPS_CAPTURE;
 175                 str_params.device_type = SND_SST_DEVICE_CAPTURE;
 176                 pr_debug("Capture stream,Device %d\n",
 177                                         substream->pcm->device);
 178         }
 179         ret_val = stream->sstdrv_ops->pcm_control->open(&str_params);
 180         pr_debug("SST_SND_PLAY/CAPTURE ret_val = %x\n", ret_val);
 181         if (ret_val < 0)
 182                 return ret_val;
 183
 184         stream->stream_info.str_id = ret_val;
 185         pr_debug("str id :  %d\n", stream->stream_info.str_id);
 186         return ret_val;
 187 }
 188
 189 static void sst_period_elapsed(void *mad_substream)
 190 {
 191         struct snd_pcm_substream *substream = mad_substream;
 192         struct sst_runtime_stream *stream;
 193         int status;
 194
 195         if (!substream || !substream->runtime)
 196                 return;
 197         stream = substream->runtime->private_data;
 198         if (!stream)
 199                 return;
 200         status = sst_get_stream_status(stream);
 201         if (status != SST_PLATFORM_RUNNING)
 202                 return;
 203         snd_pcm_period_elapsed(substream);
 204 }
 205
 206 static int sst_platform_init_stream(struct snd_pcm_substream *substream)
 207 {
 208         struct sst_runtime_stream *stream =
 209                         substream->runtime->private_data;
 210         int ret_val;
 211
 212         pr_debug("setting buffer ptr param\n");
 213         sst_set_stream_status(stream, SST_PLATFORM_INIT);
 214         stream->stream_info.period_elapsed = sst_period_elapsed;
 215         stream->stream_info.mad_substream = substream;
 216         stream->stream_info.buffer_ptr = 0;
 217         stream->stream_info.sfreq = substream->runtime->rate;
 218         ret_val = stream->sstdrv_ops->pcm_control->device_control(
 219                         SST_SND_STREAM_INIT, &stream->stream_info);
 220         if (ret_val)
 221                 pr_err("control_set ret error %d\n", ret_val);
 222         return ret_val;
 223
 224 }
 225 /* end -- helper functions */
 226
 227 static int sst_platform_open(struct snd_pcm_substream *substream)
 228 {
 229         struct snd_pcm_runtime *runtime;
 230         struct sst_runtime_stream *stream;
 231         int ret_val = 0;
 232
 233         pr_debug("sst_platform_open called\n");
 234         runtime = substream->runtime;
 235         runtime->hw = sst_platform_pcm_hw;
 236         stream = kzalloc(sizeof(*stream), GFP_KERNEL);
 237         if (!stream)
 238                 return -ENOMEM;
 239         spin_lock_init(&stream->status_lock);
 240         stream->stream_info.str_id = 0;
 241         sst_set_stream_status(stream, SST_PLATFORM_INIT);
 242         stream->stream_info.mad_substream = substream;
 243         /* allocate memory for SST API set */
 244         stream->sstdrv_ops = kzalloc(sizeof(*stream->sstdrv_ops),
 245                                                         GFP_KERNEL);
 246         if (!stream->sstdrv_ops) {
 247                 pr_err("sst: mem allocation for ops fail\n");
 248                 kfree(stream);
 249                 return -ENOMEM;
 250         }
 251         stream->sstdrv_ops->vendor_id = MSIC_VENDOR_ID;
 252         stream->sstdrv_ops->module_name = SST_CARD_NAMES;
 253         /* registering with SST driver to get access to SST APIs to use */
 254         ret_val = register_sst_card(stream->sstdrv_ops);
 255         if (ret_val) {
 256                 pr_err("sst: sst card registration failed\n");
 257                 kfree(stream->sstdrv_ops);
 258                 kfree(stream);
 259                 return ret_val;
 260         }
 261         runtime->private_data = stream;
 262         return snd_pcm_hw_constraint_integer(runtime,
 263                          SNDRV_PCM_HW_PARAM_PERIODS);
 264 }
 265
 266 static int sst_platform_close(struct snd_pcm_substream *substream)
 267 {
 268         struct sst_runtime_stream *stream;
 269         int ret_val = 0, str_id;
 270
 271         pr_debug("sst_platform_close called\n");
 272         stream = substream->runtime->private_data;
 273         str_id = stream->stream_info.str_id;
 274         if (str_id)
 275                 ret_val = stream->sstdrv_ops->pcm_control->close(str_id);
 276         unregister_sst_card(stream->sstdrv_ops);
 277         kfree(stream->sstdrv_ops);
 278         kfree(stream);
 279         return ret_val;
 280 }
 281
 282 static int sst_platform_pcm_prepare(struct snd_pcm_substream *substream)
 283 {
 284         struct sst_runtime_stream *stream;
 285         int ret_val = 0, str_id;
 286
 287         pr_debug("sst_platform_pcm_prepare called\n");
 288         stream = substream->runtime->private_data;
 289         str_id = stream->stream_info.str_id;
 290         if (stream->stream_info.str_id) {
 291                 ret_val = stream->sstdrv_ops->pcm_control->device_control(
 292                                         SST_SND_DROP, &str_id);
 293                 return ret_val;
 294         }
 295
 296         ret_val = sst_platform_alloc_stream(substream);
 297         if (ret_val < 0)
 298                 return ret_val;
 299         snprintf(substream->pcm->id, sizeof(substream->pcm->id),
 300                         "%d", stream->stream_info.str_id);
 301
 302         ret_val = sst_platform_init_stream(substream);
 303         if (ret_val)
 304                 return ret_val;
 305         substream->runtime->hw.info = SNDRV_PCM_INFO_BLOCK_TRANSFER;
 306         return ret_val;
 307 }
 308
 309 static int sst_platform_pcm_trigger(struct snd_pcm_substream *substream,
 310                                         int cmd)
 311 {
 312         int ret_val = 0, str_id;
 313         struct sst_runtime_stream *stream;
 314         int str_cmd, status;
 315
 316         pr_debug("sst_platform_pcm_trigger called\n");
 317         stream = substream->runtime->private_data;
 318         str_id = stream->stream_info.str_id;
 319         switch (cmd) {
 320         case SNDRV_PCM_TRIGGER_START:
 321                 pr_debug("sst: Trigger Start\n");
 322                 str_cmd = SST_SND_START;
 323                 status = SST_PLATFORM_RUNNING;
 324                 stream->stream_info.mad_substream = substream;
 325                 break;
 326         case SNDRV_PCM_TRIGGER_STOP:
 327                 pr_debug("sst: in stop\n");
 328                 str_cmd = SST_SND_DROP;
 329                 status = SST_PLATFORM_DROPPED;
 330                 break;
 331         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
 332                 pr_debug("sst: in pause\n");
 333                 str_cmd = SST_SND_PAUSE;
 334                 status = SST_PLATFORM_PAUSED;
 335                 break;
 336         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
 337                 pr_debug("sst: in pause release\n");
 338                 str_cmd = SST_SND_RESUME;
 339                 status = SST_PLATFORM_RUNNING;
 340                 break;
 341         default:
 342                 return -EINVAL;
 343         }
 344         ret_val = stream->sstdrv_ops->pcm_control->device_control(str_cmd,
 345                                                                 &str_id);
 346         if (!ret_val)
 347                 sst_set_stream_status(stream, status);
 348
 349         return ret_val;
 350 }
 351
 352
 353 static snd_pcm_uframes_t sst_platform_pcm_pointer
 354                         (struct snd_pcm_substream *substream)
 355 {
 356         struct sst_runtime_stream *stream;
 357         int ret_val, status;
 358         struct pcm_stream_info *str_info;
 359
 360         stream = substream->runtime->private_data;
 361         status = sst_get_stream_status(stream);
 362         if (status == SST_PLATFORM_INIT)
 363                 return 0;
 364         str_info = &stream->stream_info;
 365         ret_val = stream->sstdrv_ops->pcm_control->device_control(
 366                                 SST_SND_BUFFER_POINTER, str_info);
 367         if (ret_val) {
 368                 pr_err("sst: error code = %d\n", ret_val);
 369                 return ret_val;
 370         }
 371         return stream->stream_info.buffer_ptr;
 372 }
 373
 374 static int sst_platform_pcm_hw_params(struct snd_pcm_substream *substream,
 375                 struct snd_pcm_hw_params *params)
 376 {
 377         snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(params));
 378         memset(substream->runtime->dma_area, 0, params_buffer_bytes(params));
 379
 380         return 0;
 381 }
 382
 383 static int sst_platform_pcm_hw_free(struct snd_pcm_substream *substream)
 384 {
 385         return snd_pcm_lib_free_pages(substream);
 386 }
 387
 388 static struct snd_pcm_ops sst_platform_ops = {
 389         .open = sst_platform_open,
 390         .close = sst_platform_close,
 391         .ioctl = snd_pcm_lib_ioctl,
 392         .prepare = sst_platform_pcm_prepare,
 393         .trigger = sst_platform_pcm_trigger,
 394         .pointer = sst_platform_pcm_pointer,
 395         .hw_params = sst_platform_pcm_hw_params,
 396         .hw_free = sst_platform_pcm_hw_free,
 397 };
 398
 399 static void sst_pcm_free(struct snd_pcm *pcm)
 400 {
 401         pr_debug("sst_pcm_free called\n");
 402         snd_pcm_lib_preallocate_free_for_all(pcm);
 403 }
 404
 405 int sst_pcm_new(struct snd_soc_pcm_runtime *rtd)
 406 {
 407         struct snd_soc_dai *dai = rtd->cpu_dai;
 408         struct snd_pcm *pcm = rtd->pcm;
 409         int retval = 0;
 410
 411         pr_debug("sst_pcm_new called\n");
 412         if (dai->driver->playback.channels_min ||
 413                         dai->driver->capture.channels_min) {
 414                 retval =  snd_pcm_lib_preallocate_pages_for_all(pcm,
 415                         SNDRV_DMA_TYPE_CONTINUOUS,
 416                         snd_dma_continuous_data(GFP_KERNEL),
 417                         SST_MIN_BUFFER, SST_MAX_BUFFER);
 418                 if (retval) {
 419                         pr_err("dma buffer allocationf fail\n");
 420                         return retval;
 421                 }
 422         }
 423         return retval;
 424 }
 425 struct snd_soc_platform_driver sst_soc_platform_drv = {
 426         .ops            = &sst_platform_ops,
 427         .pcm_new        = sst_pcm_new,
 428         .pcm_free       = sst_pcm_free,
 429 };
 430
 431 static int sst_platform_probe(struct platform_device *pdev)
 432 {
 433         int ret;
 434
 435         pr_debug("sst_platform_probe called\n");
 436         ret = snd_soc_register_platform(&pdev->dev, &sst_soc_platform_drv);
 437         if (ret) {
 438                 pr_err("registering soc platform failed\n");
 439                 return ret;
 440         }
 441
 442         ret = snd_soc_register_dais(&pdev->dev,
 443                                 sst_platform_dai, ARRAY_SIZE(sst_platform_dai));
 444         if (ret) {
 445                 pr_err("registering cpu dais failed\n");
 446                 snd_soc_unregister_platform(&pdev->dev);
 447         }
 448         return ret;
 449 }
 450
 451 static int sst_platform_remove(struct platform_device *pdev)
 452 {
 453
 454         snd_soc_unregister_dais(&pdev->dev, ARRAY_SIZE(sst_platform_dai));
 455         snd_soc_unregister_platform(&pdev->dev);
 456         pr_debug("sst_platform_remove success\n");
 457         return 0;
 458 }
 459
 460 static struct platform_driver sst_platform_driver = {
 461         .driver         = {
 462                 .name           = "sst-platform",
 463                 .owner          = THIS_MODULE,
 464         },
 465         .probe          = sst_platform_probe,
 466         .remove         = sst_platform_remove,
 467 };
 468
 469 static int __init sst_soc_platform_init(void)
 470 {
 471         pr_debug("sst_soc_platform_init called\n");
 472         return  platform_driver_register(&sst_platform_driver);
 473 }
 474 module_init(sst_soc_platform_init);
 475
 476 static void __exit sst_soc_platform_exit(void)
 477 {
 478         platform_driver_unregister(&sst_platform_driver);
 479         pr_debug("sst_soc_platform_exit success\n");
 480 }
 481 module_exit(sst_soc_platform_exit);
 482
 483 MODULE_DESCRIPTION("ASoC Intel(R) MID Platform driver");
 484 MODULE_AUTHOR("Vinod Koul <vinod.koul@intel.com>");
 485 MODULE_AUTHOR("Harsha Priya <priya.harsha@intel.com>");
 486 MODULE_LICENSE("GPL v2");
 487 MODULE_ALIAS("platform:sst-platform");