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