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         /* registering with SST driver to get access to SST APIs to use */
 253         ret_val = register_sst_card(stream->sstdrv_ops);
 254         if (ret_val) {
 255                 pr_err("sst: sst card registration failed\n");
 256                 return ret_val;
 257         }
 258         runtime->private_data = stream;
 259         return snd_pcm_hw_constraint_integer(runtime,
 260                          SNDRV_PCM_HW_PARAM_PERIODS);
 261 }
 262
 263 static int sst_platform_close(struct snd_pcm_substream *substream)
 264 {
 265         struct sst_runtime_stream *stream;
 266         int ret_val = 0, str_id;
 267
 268         pr_debug("sst_platform_close called\n");
 269         stream = substream->runtime->private_data;
 270         str_id = stream->stream_info.str_id;
 271         if (str_id)
 272                 ret_val = stream->sstdrv_ops->pcm_control->close(str_id);
 273         kfree(stream->sstdrv_ops);
 274         kfree(stream);
 275         return ret_val;
 276 }
 277
 278 static int sst_platform_pcm_prepare(struct snd_pcm_substream *substream)
 279 {
 280         struct sst_runtime_stream *stream;
 281         int ret_val = 0, str_id;
 282
 283         pr_debug("sst_platform_pcm_prepare called\n");
 284         stream = substream->runtime->private_data;
 285         str_id = stream->stream_info.str_id;
 286         if (stream->stream_info.str_id) {
 287                 ret_val = stream->sstdrv_ops->pcm_control->device_control(
 288                                         SST_SND_DROP, &str_id);
 289                 return ret_val;
 290         }
 291
 292         ret_val = sst_platform_alloc_stream(substream);
 293         if (ret_val < 0)
 294                 return ret_val;
 295         snprintf(substream->pcm->id, sizeof(substream->pcm->id),
 296                         "%d", stream->stream_info.str_id);
 297
 298         ret_val = sst_platform_init_stream(substream);
 299         if (ret_val)
 300                 return ret_val;
 301         substream->runtime->hw.info = SNDRV_PCM_INFO_BLOCK_TRANSFER;
 302         return ret_val;
 303 }
 304
 305 static int sst_platform_pcm_trigger(struct snd_pcm_substream *substream,
 306                                         int cmd)
 307 {
 308         int ret_val = 0, str_id;
 309         struct sst_runtime_stream *stream;
 310         int str_cmd, status;
 311
 312         pr_debug("sst_platform_pcm_trigger called\n");
 313         stream = substream->runtime->private_data;
 314         str_id = stream->stream_info.str_id;
 315         switch (cmd) {
 316         case SNDRV_PCM_TRIGGER_START:
 317                 pr_debug("sst: Trigger Start\n");
 318                 str_cmd = SST_SND_START;
 319                 status = SST_PLATFORM_RUNNING;
 320                 stream->stream_info.mad_substream = substream;
 321                 break;
 322         case SNDRV_PCM_TRIGGER_STOP:
 323                 pr_debug("sst: in stop\n");
 324                 str_cmd = SST_SND_DROP;
 325                 status = SST_PLATFORM_DROPPED;
 326                 break;
 327         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
 328                 pr_debug("sst: in pause\n");
 329                 str_cmd = SST_SND_PAUSE;
 330                 status = SST_PLATFORM_PAUSED;
 331                 break;
 332         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
 333                 pr_debug("sst: in pause release\n");
 334                 str_cmd = SST_SND_RESUME;
 335                 status = SST_PLATFORM_RUNNING;
 336                 break;
 337         default:
 338                 return -EINVAL;
 339         }
 340         ret_val = stream->sstdrv_ops->pcm_control->device_control(str_cmd,
 341                                                                 &str_id);
 342         if (!ret_val)
 343                 sst_set_stream_status(stream, status);
 344
 345         return ret_val;
 346 }
 347
 348
 349 static snd_pcm_uframes_t sst_platform_pcm_pointer
 350                         (struct snd_pcm_substream *substream)
 351 {
 352         struct sst_runtime_stream *stream;
 353         int ret_val, status;
 354         struct pcm_stream_info *str_info;
 355
 356         stream = substream->runtime->private_data;
 357         status = sst_get_stream_status(stream);
 358         if (status == SST_PLATFORM_INIT)
 359                 return 0;
 360         str_info = &stream->stream_info;
 361         ret_val = stream->sstdrv_ops->pcm_control->device_control(
 362                                 SST_SND_BUFFER_POINTER, str_info);
 363         if (ret_val) {
 364                 pr_err("sst: error code = %d\n", ret_val);
 365                 return ret_val;
 366         }
 367         return stream->stream_info.buffer_ptr;
 368 }
 369
 370 static int sst_platform_pcm_hw_params(struct snd_pcm_substream *substream,
 371                 struct snd_pcm_hw_params *params)
 372 {
 373         snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(params));
 374         memset(substream->runtime->dma_area, 0, params_buffer_bytes(params));
 375
 376         return 0;
 377 }
 378
 379 static struct snd_pcm_ops sst_platform_ops = {
 380         .open = sst_platform_open,
 381         .close = sst_platform_close,
 382         .ioctl = snd_pcm_lib_ioctl,
 383         .prepare = sst_platform_pcm_prepare,
 384         .trigger = sst_platform_pcm_trigger,
 385         .pointer = sst_platform_pcm_pointer,
 386         .hw_params = sst_platform_pcm_hw_params,
 387 };
 388
 389 static void sst_pcm_free(struct snd_pcm *pcm)
 390 {
 391         pr_debug("sst_pcm_free called\n");
 392         snd_pcm_lib_preallocate_free_for_all(pcm);
 393 }
 394
 395 int sst_pcm_new(struct snd_card *card, struct snd_soc_dai *dai,
 396                         struct snd_pcm *pcm)
 397 {
 398         int retval = 0;
 399
 400         pr_debug("sst_pcm_new called\n");
 401         if (dai->driver->playback.channels_min ||
 402                         dai->driver->capture.channels_min) {
 403                 retval =  snd_pcm_lib_preallocate_pages_for_all(pcm,
 404                         SNDRV_DMA_TYPE_CONTINUOUS,
 405                         snd_dma_continuous_data(GFP_KERNEL),
 406                         SST_MIN_BUFFER, SST_MAX_BUFFER);
 407                 if (retval) {
 408                         pr_err("dma buffer allocationf fail\n");
 409                         return retval;
 410                 }
 411         }
 412         return retval;
 413 }
 414 struct snd_soc_platform_driver sst_soc_platform_drv = {
 415         .ops            = &sst_platform_ops,
 416         .pcm_new        = sst_pcm_new,
 417         .pcm_free       = sst_pcm_free,
 418 };
 419
 420 static int sst_platform_probe(struct platform_device *pdev)
 421 {
 422         int ret;
 423
 424         pr_debug("sst_platform_probe called\n");
 425         ret = snd_soc_register_platform(&pdev->dev, &sst_soc_platform_drv);
 426         if (ret) {
 427                 pr_err("registering soc platform failed\n");
 428                 return ret;
 429         }
 430
 431         ret = snd_soc_register_dais(&pdev->dev,
 432                                 sst_platform_dai, ARRAY_SIZE(sst_platform_dai));
 433         if (ret) {
 434                 pr_err("registering cpu dais failed\n");
 435                 snd_soc_unregister_platform(&pdev->dev);
 436         }
 437         return ret;
 438 }
 439
 440 static int sst_platform_remove(struct platform_device *pdev)
 441 {
 442
 443         snd_soc_unregister_dais(&pdev->dev, ARRAY_SIZE(sst_platform_dai));
 444         snd_soc_unregister_platform(&pdev->dev);
 445         pr_debug("sst_platform_remove success\n");
 446         return 0;
 447 }
 448
 449 static struct platform_driver sst_platform_driver = {
 450         .driver         = {
 451                 .name           = "sst-platform",
 452                 .owner          = THIS_MODULE,
 453         },
 454         .probe          = sst_platform_probe,
 455         .remove         = sst_platform_remove,
 456 };
 457
 458 static int __init sst_soc_platform_init(void)
 459 {
 460         pr_debug("sst_soc_platform_init called\n");
 461         return  platform_driver_register(&sst_platform_driver);
 462 }
 463 module_init(sst_soc_platform_init);
 464
 465 static void __exit sst_soc_platform_exit(void)
 466 {
 467         platform_driver_unregister(&sst_platform_driver);
 468         pr_debug("sst_soc_platform_exit success\n");
 469 }
 470 module_exit(sst_soc_platform_exit);
 471
 472 MODULE_DESCRIPTION("ASoC Intel(R) MID Platform driver");
 473 MODULE_AUTHOR("Vinod Koul <vinod.koul@intel.com>");
 474 MODULE_AUTHOR("Harsha Priya <priya.harsha@intel.com>");
 475 MODULE_LICENSE("GPL v2");
 476 MODULE_ALIAS("platform:sst-platform");