1 /* 2 * sst_mfld_platform.c - Intel MID Platform driver 3 * 4 * Copyright (C) 2010-2014 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 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 19 */ 20 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 21 22 #include <linux/slab.h> 23 #include <linux/io.h> 24 #include <linux/module.h> 25 #include <sound/core.h> 26 #include <sound/pcm.h> 27 #include <sound/pcm_params.h> 28 #include <sound/soc.h> 29 #include <sound/compress_driver.h> 30 #include <asm/platform_sst_audio.h> 31 #include "sst-mfld-platform.h" 32 #include "sst-atom-controls.h" 33 34 struct sst_device *sst; 35 static DEFINE_MUTEX(sst_lock); 36 37 int sst_register_dsp(struct sst_device *dev) 38 { 39 if (WARN_ON(!dev)) 40 return -EINVAL; 41 if (!try_module_get(dev->dev->driver->owner)) 42 return -ENODEV; 43 mutex_lock(&sst_lock); 44 if (sst) { 45 dev_err(dev->dev, "we already have a device %s\n", sst->name); 46 module_put(dev->dev->driver->owner); 47 mutex_unlock(&sst_lock); 48 return -EEXIST; 49 } 50 dev_dbg(dev->dev, "registering device %s\n", dev->name); 51 sst = dev; 52 mutex_unlock(&sst_lock); 53 return 0; 54 } 55 EXPORT_SYMBOL_GPL(sst_register_dsp); 56 57 int sst_unregister_dsp(struct sst_device *dev) 58 { 59 if (WARN_ON(!dev)) 60 return -EINVAL; 61 if (dev != sst) 62 return -EINVAL; 63 64 mutex_lock(&sst_lock); 65 66 if (!sst) { 67 mutex_unlock(&sst_lock); 68 return -EIO; 69 } 70 71 module_put(sst->dev->driver->owner); 72 dev_dbg(dev->dev, "unreg %s\n", sst->name); 73 sst = NULL; 74 mutex_unlock(&sst_lock); 75 return 0; 76 } 77 EXPORT_SYMBOL_GPL(sst_unregister_dsp); 78 79 static const struct snd_pcm_hardware sst_platform_pcm_hw = { 80 .info = (SNDRV_PCM_INFO_INTERLEAVED | 81 SNDRV_PCM_INFO_DOUBLE | 82 SNDRV_PCM_INFO_PAUSE | 83 SNDRV_PCM_INFO_RESUME | 84 SNDRV_PCM_INFO_MMAP| 85 SNDRV_PCM_INFO_MMAP_VALID | 86 SNDRV_PCM_INFO_BLOCK_TRANSFER | 87 SNDRV_PCM_INFO_SYNC_START), 88 .buffer_bytes_max = SST_MAX_BUFFER, 89 .period_bytes_min = SST_MIN_PERIOD_BYTES, 90 .period_bytes_max = SST_MAX_PERIOD_BYTES, 91 .periods_min = SST_MIN_PERIODS, 92 .periods_max = SST_MAX_PERIODS, 93 .fifo_size = SST_FIFO_SIZE, 94 }; 95 96 static struct sst_dev_stream_map dpcm_strm_map[] = { 97 {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF}, /* Reserved, not in use */ 98 {MERR_DPCM_AUDIO, 0, SNDRV_PCM_STREAM_PLAYBACK, PIPE_MEDIA1_IN, SST_TASK_ID_MEDIA, 0}, 99 {MERR_DPCM_COMPR, 0, SNDRV_PCM_STREAM_PLAYBACK, PIPE_MEDIA0_IN, SST_TASK_ID_MEDIA, 0}, 100 {MERR_DPCM_AUDIO, 0, SNDRV_PCM_STREAM_CAPTURE, PIPE_PCM1_OUT, SST_TASK_ID_MEDIA, 0}, 101 {MERR_DPCM_DEEP_BUFFER, 0, SNDRV_PCM_STREAM_PLAYBACK, PIPE_MEDIA3_IN, SST_TASK_ID_MEDIA, 0}, 102 }; 103 104 static int sst_media_digital_mute(struct snd_soc_dai *dai, int mute, int stream) 105 { 106 107 return sst_send_pipe_gains(dai, stream, mute); 108 } 109 110 /* helper functions */ 111 void sst_set_stream_status(struct sst_runtime_stream *stream, 112 int state) 113 { 114 unsigned long flags; 115 spin_lock_irqsave(&stream->status_lock, flags); 116 stream->stream_status = state; 117 spin_unlock_irqrestore(&stream->status_lock, flags); 118 } 119 120 static inline int sst_get_stream_status(struct sst_runtime_stream *stream) 121 { 122 int state; 123 unsigned long flags; 124 125 spin_lock_irqsave(&stream->status_lock, flags); 126 state = stream->stream_status; 127 spin_unlock_irqrestore(&stream->status_lock, flags); 128 return state; 129 } 130 131 static void sst_fill_alloc_params(struct snd_pcm_substream *substream, 132 struct snd_sst_alloc_params_ext *alloc_param) 133 { 134 unsigned int channels; 135 snd_pcm_uframes_t period_size; 136 ssize_t periodbytes; 137 ssize_t buffer_bytes = snd_pcm_lib_buffer_bytes(substream); 138 u32 buffer_addr = virt_to_phys(substream->dma_buffer.area); 139 140 channels = substream->runtime->channels; 141 period_size = substream->runtime->period_size; 142 periodbytes = samples_to_bytes(substream->runtime, period_size); 143 alloc_param->ring_buf_info[0].addr = buffer_addr; 144 alloc_param->ring_buf_info[0].size = buffer_bytes; 145 alloc_param->sg_count = 1; 146 alloc_param->reserved = 0; 147 alloc_param->frag_size = periodbytes * channels; 148 149 } 150 static void sst_fill_pcm_params(struct snd_pcm_substream *substream, 151 struct snd_sst_stream_params *param) 152 { 153 param->uc.pcm_params.num_chan = (u8) substream->runtime->channels; 154 param->uc.pcm_params.pcm_wd_sz = substream->runtime->sample_bits; 155 param->uc.pcm_params.sfreq = substream->runtime->rate; 156 157 /* PCM stream via ALSA interface */ 158 param->uc.pcm_params.use_offload_path = 0; 159 param->uc.pcm_params.reserved2 = 0; 160 memset(param->uc.pcm_params.channel_map, 0, sizeof(u8)); 161 162 } 163 164 static int sst_get_stream_mapping(int dev, int sdev, int dir, 165 struct sst_dev_stream_map *map, int size) 166 { 167 int i; 168 169 if (map == NULL) 170 return -EINVAL; 171 172 173 /* index 0 is not used in stream map */ 174 for (i = 1; i < size; i++) { 175 if ((map[i].dev_num == dev) && (map[i].direction == dir)) 176 return i; 177 } 178 return 0; 179 } 180 181 int sst_fill_stream_params(void *substream, 182 const struct sst_data *ctx, struct snd_sst_params *str_params, bool is_compress) 183 { 184 int map_size; 185 int index; 186 struct sst_dev_stream_map *map; 187 struct snd_pcm_substream *pstream = NULL; 188 struct snd_compr_stream *cstream = NULL; 189 190 map = ctx->pdata->pdev_strm_map; 191 map_size = ctx->pdata->strm_map_size; 192 193 if (is_compress) 194 cstream = (struct snd_compr_stream *)substream; 195 else 196 pstream = (struct snd_pcm_substream *)substream; 197 198 str_params->stream_type = SST_STREAM_TYPE_MUSIC; 199 200 /* For pcm streams */ 201 if (pstream) { 202 index = sst_get_stream_mapping(pstream->pcm->device, 203 pstream->number, pstream->stream, 204 map, map_size); 205 if (index <= 0) 206 return -EINVAL; 207 208 str_params->stream_id = index; 209 str_params->device_type = map[index].device_id; 210 str_params->task = map[index].task_id; 211 212 str_params->ops = (u8)pstream->stream; 213 } 214 215 if (cstream) { 216 index = sst_get_stream_mapping(cstream->device->device, 217 0, cstream->direction, 218 map, map_size); 219 if (index <= 0) 220 return -EINVAL; 221 str_params->stream_id = index; 222 str_params->device_type = map[index].device_id; 223 str_params->task = map[index].task_id; 224 225 str_params->ops = (u8)cstream->direction; 226 } 227 return 0; 228 } 229 230 static int sst_platform_alloc_stream(struct snd_pcm_substream *substream, 231 struct snd_soc_dai *dai) 232 { 233 struct sst_runtime_stream *stream = 234 substream->runtime->private_data; 235 struct snd_sst_stream_params param = {{{0,},},}; 236 struct snd_sst_params str_params = {0}; 237 struct snd_sst_alloc_params_ext alloc_params = {0}; 238 int ret_val = 0; 239 struct sst_data *ctx = snd_soc_dai_get_drvdata(dai); 240 241 /* set codec params and inform SST driver the same */ 242 sst_fill_pcm_params(substream, ¶m); 243 sst_fill_alloc_params(substream, &alloc_params); 244 substream->runtime->dma_area = substream->dma_buffer.area; 245 str_params.sparams = param; 246 str_params.aparams = alloc_params; 247 str_params.codec = SST_CODEC_TYPE_PCM; 248 249 /* fill the device type and stream id to pass to SST driver */ 250 ret_val = sst_fill_stream_params(substream, ctx, &str_params, false); 251 if (ret_val < 0) 252 return ret_val; 253 254 stream->stream_info.str_id = str_params.stream_id; 255 256 ret_val = stream->ops->open(sst->dev, &str_params); 257 if (ret_val <= 0) 258 return ret_val; 259 260 261 return ret_val; 262 } 263 264 static void sst_period_elapsed(void *arg) 265 { 266 struct snd_pcm_substream *substream = arg; 267 struct sst_runtime_stream *stream; 268 int status; 269 270 if (!substream || !substream->runtime) 271 return; 272 stream = substream->runtime->private_data; 273 if (!stream) 274 return; 275 status = sst_get_stream_status(stream); 276 if (status != SST_PLATFORM_RUNNING) 277 return; 278 snd_pcm_period_elapsed(substream); 279 } 280 281 static int sst_platform_init_stream(struct snd_pcm_substream *substream) 282 { 283 struct sst_runtime_stream *stream = 284 substream->runtime->private_data; 285 struct snd_soc_pcm_runtime *rtd = substream->private_data; 286 int ret_val; 287 288 dev_dbg(rtd->dev, "setting buffer ptr param\n"); 289 sst_set_stream_status(stream, SST_PLATFORM_INIT); 290 stream->stream_info.period_elapsed = sst_period_elapsed; 291 stream->stream_info.arg = substream; 292 stream->stream_info.buffer_ptr = 0; 293 stream->stream_info.sfreq = substream->runtime->rate; 294 ret_val = stream->ops->stream_init(sst->dev, &stream->stream_info); 295 if (ret_val) 296 dev_err(rtd->dev, "control_set ret error %d\n", ret_val); 297 return ret_val; 298 299 } 300 301 static int power_up_sst(struct sst_runtime_stream *stream) 302 { 303 return stream->ops->power(sst->dev, true); 304 } 305 306 static void power_down_sst(struct sst_runtime_stream *stream) 307 { 308 stream->ops->power(sst->dev, false); 309 } 310 311 static int sst_media_open(struct snd_pcm_substream *substream, 312 struct snd_soc_dai *dai) 313 { 314 int ret_val = 0; 315 struct snd_pcm_runtime *runtime = substream->runtime; 316 struct sst_runtime_stream *stream; 317 318 stream = kzalloc(sizeof(*stream), GFP_KERNEL); 319 if (!stream) 320 return -ENOMEM; 321 spin_lock_init(&stream->status_lock); 322 323 /* get the sst ops */ 324 mutex_lock(&sst_lock); 325 if (!sst || 326 !try_module_get(sst->dev->driver->owner)) { 327 dev_err(dai->dev, "no device available to run\n"); 328 ret_val = -ENODEV; 329 goto out_ops; 330 } 331 stream->ops = sst->ops; 332 mutex_unlock(&sst_lock); 333 334 stream->stream_info.str_id = 0; 335 336 stream->stream_info.arg = substream; 337 /* allocate memory for SST API set */ 338 runtime->private_data = stream; 339 340 ret_val = power_up_sst(stream); 341 if (ret_val < 0) 342 return ret_val; 343 344 /* Make sure, that the period size is always even */ 345 snd_pcm_hw_constraint_step(substream->runtime, 0, 346 SNDRV_PCM_HW_PARAM_PERIODS, 2); 347 348 return snd_pcm_hw_constraint_integer(runtime, 349 SNDRV_PCM_HW_PARAM_PERIODS); 350 out_ops: 351 kfree(stream); 352 mutex_unlock(&sst_lock); 353 return ret_val; 354 } 355 356 static void sst_media_close(struct snd_pcm_substream *substream, 357 struct snd_soc_dai *dai) 358 { 359 struct sst_runtime_stream *stream; 360 int str_id; 361 362 stream = substream->runtime->private_data; 363 power_down_sst(stream); 364 365 str_id = stream->stream_info.str_id; 366 if (str_id) 367 stream->ops->close(sst->dev, str_id); 368 module_put(sst->dev->driver->owner); 369 kfree(stream); 370 } 371 372 static int sst_media_prepare(struct snd_pcm_substream *substream, 373 struct snd_soc_dai *dai) 374 { 375 struct sst_runtime_stream *stream; 376 int ret_val = 0, str_id; 377 378 stream = substream->runtime->private_data; 379 str_id = stream->stream_info.str_id; 380 if (stream->stream_info.str_id) { 381 ret_val = stream->ops->stream_drop(sst->dev, str_id); 382 return ret_val; 383 } 384 385 ret_val = sst_platform_alloc_stream(substream, dai); 386 if (ret_val <= 0) 387 return ret_val; 388 snprintf(substream->pcm->id, sizeof(substream->pcm->id), 389 "%d", stream->stream_info.str_id); 390 391 ret_val = sst_platform_init_stream(substream); 392 if (ret_val) 393 return ret_val; 394 substream->runtime->hw.info = SNDRV_PCM_INFO_BLOCK_TRANSFER; 395 return ret_val; 396 } 397 398 static int sst_media_hw_params(struct snd_pcm_substream *substream, 399 struct snd_pcm_hw_params *params, 400 struct snd_soc_dai *dai) 401 { 402 int ret; 403 404 ret = 405 snd_pcm_lib_malloc_pages(substream, 406 params_buffer_bytes(params)); 407 if (ret) 408 return ret; 409 memset(substream->runtime->dma_area, 0, params_buffer_bytes(params)); 410 return 0; 411 } 412 413 static int sst_media_hw_free(struct snd_pcm_substream *substream, 414 struct snd_soc_dai *dai) 415 { 416 return snd_pcm_lib_free_pages(substream); 417 } 418 419 static int sst_enable_ssp(struct snd_pcm_substream *substream, 420 struct snd_soc_dai *dai) 421 { 422 int ret = 0; 423 424 if (!dai->active) { 425 ret = sst_handle_vb_timer(dai, true); 426 sst_fill_ssp_defaults(dai); 427 } 428 return ret; 429 } 430 431 static int sst_be_hw_params(struct snd_pcm_substream *substream, 432 struct snd_pcm_hw_params *params, 433 struct snd_soc_dai *dai) 434 { 435 int ret = 0; 436 437 if (dai->active == 1) 438 ret = send_ssp_cmd(dai, dai->name, 1); 439 return ret; 440 } 441 442 static int sst_set_format(struct snd_soc_dai *dai, unsigned int fmt) 443 { 444 int ret = 0; 445 446 if (!dai->active) 447 return 0; 448 449 ret = sst_fill_ssp_config(dai, fmt); 450 if (ret < 0) 451 dev_err(dai->dev, "sst_set_format failed..\n"); 452 453 return ret; 454 } 455 456 static int sst_platform_set_ssp_slot(struct snd_soc_dai *dai, 457 unsigned int tx_mask, unsigned int rx_mask, 458 int slots, int slot_width) { 459 int ret = 0; 460 461 if (!dai->active) 462 return ret; 463 464 ret = sst_fill_ssp_slot(dai, tx_mask, rx_mask, slots, slot_width); 465 if (ret < 0) 466 dev_err(dai->dev, "sst_fill_ssp_slot failed..%d\n", ret); 467 468 return ret; 469 } 470 471 static void sst_disable_ssp(struct snd_pcm_substream *substream, 472 struct snd_soc_dai *dai) 473 { 474 if (!dai->active) { 475 send_ssp_cmd(dai, dai->name, 0); 476 sst_handle_vb_timer(dai, false); 477 } 478 } 479 480 static const struct snd_soc_dai_ops sst_media_dai_ops = { 481 .startup = sst_media_open, 482 .shutdown = sst_media_close, 483 .prepare = sst_media_prepare, 484 .hw_params = sst_media_hw_params, 485 .hw_free = sst_media_hw_free, 486 .mute_stream = sst_media_digital_mute, 487 }; 488 489 static const struct snd_soc_dai_ops sst_compr_dai_ops = { 490 .mute_stream = sst_media_digital_mute, 491 }; 492 493 static const struct snd_soc_dai_ops sst_be_dai_ops = { 494 .startup = sst_enable_ssp, 495 .hw_params = sst_be_hw_params, 496 .set_fmt = sst_set_format, 497 .set_tdm_slot = sst_platform_set_ssp_slot, 498 .shutdown = sst_disable_ssp, 499 }; 500 501 static struct snd_soc_dai_driver sst_platform_dai[] = { 502 { 503 .name = "media-cpu-dai", 504 .ops = &sst_media_dai_ops, 505 .playback = { 506 .stream_name = "Headset Playback", 507 .channels_min = SST_STEREO, 508 .channels_max = SST_STEREO, 509 .rates = SNDRV_PCM_RATE_44100|SNDRV_PCM_RATE_48000, 510 .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE, 511 }, 512 .capture = { 513 .stream_name = "Headset Capture", 514 .channels_min = 1, 515 .channels_max = 2, 516 .rates = SNDRV_PCM_RATE_44100|SNDRV_PCM_RATE_48000, 517 .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE, 518 }, 519 }, 520 { 521 .name = "deepbuffer-cpu-dai", 522 .ops = &sst_media_dai_ops, 523 .playback = { 524 .stream_name = "Deepbuffer Playback", 525 .channels_min = SST_STEREO, 526 .channels_max = SST_STEREO, 527 .rates = SNDRV_PCM_RATE_44100|SNDRV_PCM_RATE_48000, 528 .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE, 529 }, 530 }, 531 { 532 .name = "compress-cpu-dai", 533 .compress_new = snd_soc_new_compress, 534 .ops = &sst_compr_dai_ops, 535 .playback = { 536 .stream_name = "Compress Playback", 537 .channels_min = 1, 538 }, 539 }, 540 /* BE CPU Dais */ 541 { 542 .name = "ssp0-port", 543 .ops = &sst_be_dai_ops, 544 .playback = { 545 .stream_name = "ssp0 Tx", 546 .channels_min = SST_STEREO, 547 .channels_max = SST_STEREO, 548 .rates = SNDRV_PCM_RATE_48000, 549 .formats = SNDRV_PCM_FMTBIT_S16_LE, 550 }, 551 .capture = { 552 .stream_name = "ssp0 Rx", 553 .channels_min = SST_STEREO, 554 .channels_max = SST_STEREO, 555 .rates = SNDRV_PCM_RATE_48000, 556 .formats = SNDRV_PCM_FMTBIT_S16_LE, 557 }, 558 }, 559 { 560 .name = "ssp1-port", 561 .ops = &sst_be_dai_ops, 562 .playback = { 563 .stream_name = "ssp1 Tx", 564 .channels_min = SST_STEREO, 565 .channels_max = SST_STEREO, 566 .rates = SNDRV_PCM_RATE_8000|SNDRV_PCM_RATE_16000|SNDRV_PCM_RATE_48000, 567 .formats = SNDRV_PCM_FMTBIT_S16_LE, 568 }, 569 .capture = { 570 .stream_name = "ssp1 Rx", 571 .channels_min = SST_STEREO, 572 .channels_max = SST_STEREO, 573 .rates = SNDRV_PCM_RATE_8000|SNDRV_PCM_RATE_16000|SNDRV_PCM_RATE_48000, 574 .formats = SNDRV_PCM_FMTBIT_S16_LE, 575 }, 576 }, 577 { 578 .name = "ssp2-port", 579 .ops = &sst_be_dai_ops, 580 .playback = { 581 .stream_name = "ssp2 Tx", 582 .channels_min = SST_STEREO, 583 .channels_max = SST_STEREO, 584 .rates = SNDRV_PCM_RATE_48000, 585 .formats = SNDRV_PCM_FMTBIT_S16_LE, 586 }, 587 .capture = { 588 .stream_name = "ssp2 Rx", 589 .channels_min = SST_STEREO, 590 .channels_max = SST_STEREO, 591 .rates = SNDRV_PCM_RATE_48000, 592 .formats = SNDRV_PCM_FMTBIT_S16_LE, 593 }, 594 }, 595 }; 596 597 static int sst_platform_open(struct snd_pcm_substream *substream) 598 { 599 struct snd_pcm_runtime *runtime; 600 601 if (substream->pcm->internal) 602 return 0; 603 604 runtime = substream->runtime; 605 runtime->hw = sst_platform_pcm_hw; 606 return 0; 607 } 608 609 static int sst_platform_pcm_trigger(struct snd_pcm_substream *substream, 610 int cmd) 611 { 612 int ret_val = 0, str_id; 613 struct sst_runtime_stream *stream; 614 int status; 615 struct snd_soc_pcm_runtime *rtd = substream->private_data; 616 617 dev_dbg(rtd->dev, "sst_platform_pcm_trigger called\n"); 618 if (substream->pcm->internal) 619 return 0; 620 stream = substream->runtime->private_data; 621 str_id = stream->stream_info.str_id; 622 switch (cmd) { 623 case SNDRV_PCM_TRIGGER_START: 624 dev_dbg(rtd->dev, "sst: Trigger Start\n"); 625 status = SST_PLATFORM_RUNNING; 626 stream->stream_info.arg = substream; 627 ret_val = stream->ops->stream_start(sst->dev, str_id); 628 break; 629 case SNDRV_PCM_TRIGGER_STOP: 630 dev_dbg(rtd->dev, "sst: in stop\n"); 631 status = SST_PLATFORM_DROPPED; 632 ret_val = stream->ops->stream_drop(sst->dev, str_id); 633 break; 634 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 635 case SNDRV_PCM_TRIGGER_SUSPEND: 636 dev_dbg(rtd->dev, "sst: in pause\n"); 637 status = SST_PLATFORM_PAUSED; 638 ret_val = stream->ops->stream_pause(sst->dev, str_id); 639 break; 640 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 641 case SNDRV_PCM_TRIGGER_RESUME: 642 dev_dbg(rtd->dev, "sst: in pause release\n"); 643 status = SST_PLATFORM_RUNNING; 644 ret_val = stream->ops->stream_pause_release(sst->dev, str_id); 645 break; 646 default: 647 return -EINVAL; 648 } 649 650 if (!ret_val) 651 sst_set_stream_status(stream, status); 652 653 return ret_val; 654 } 655 656 657 static snd_pcm_uframes_t sst_platform_pcm_pointer 658 (struct snd_pcm_substream *substream) 659 { 660 struct sst_runtime_stream *stream; 661 int ret_val, status; 662 struct pcm_stream_info *str_info; 663 struct snd_soc_pcm_runtime *rtd = substream->private_data; 664 665 stream = substream->runtime->private_data; 666 status = sst_get_stream_status(stream); 667 if (status == SST_PLATFORM_INIT) 668 return 0; 669 str_info = &stream->stream_info; 670 ret_val = stream->ops->stream_read_tstamp(sst->dev, str_info); 671 if (ret_val) { 672 dev_err(rtd->dev, "sst: error code = %d\n", ret_val); 673 return ret_val; 674 } 675 substream->runtime->delay = str_info->pcm_delay; 676 return str_info->buffer_ptr; 677 } 678 679 static const struct snd_pcm_ops sst_platform_ops = { 680 .open = sst_platform_open, 681 .ioctl = snd_pcm_lib_ioctl, 682 .trigger = sst_platform_pcm_trigger, 683 .pointer = sst_platform_pcm_pointer, 684 }; 685 686 static int sst_pcm_new(struct snd_soc_pcm_runtime *rtd) 687 { 688 struct snd_soc_dai *dai = rtd->cpu_dai; 689 struct snd_pcm *pcm = rtd->pcm; 690 691 if (dai->driver->playback.channels_min || 692 dai->driver->capture.channels_min) { 693 snd_pcm_lib_preallocate_pages_for_all(pcm, 694 SNDRV_DMA_TYPE_CONTINUOUS, 695 snd_dma_continuous_data(GFP_DMA), 696 SST_MIN_BUFFER, SST_MAX_BUFFER); 697 } 698 return 0; 699 } 700 701 static int sst_soc_probe(struct snd_soc_component *component) 702 { 703 struct sst_data *drv = dev_get_drvdata(component->dev); 704 705 drv->soc_card = component->card; 706 return sst_dsp_init_v2_dpcm(component); 707 } 708 709 static const struct snd_soc_component_driver sst_soc_platform_drv = { 710 .name = DRV_NAME, 711 .probe = sst_soc_probe, 712 .ops = &sst_platform_ops, 713 .compr_ops = &sst_platform_compr_ops, 714 .pcm_new = sst_pcm_new, 715 }; 716 717 static int sst_platform_probe(struct platform_device *pdev) 718 { 719 struct sst_data *drv; 720 int ret; 721 struct sst_platform_data *pdata; 722 723 drv = devm_kzalloc(&pdev->dev, sizeof(*drv), GFP_KERNEL); 724 if (drv == NULL) { 725 return -ENOMEM; 726 } 727 728 pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL); 729 if (pdata == NULL) { 730 return -ENOMEM; 731 } 732 733 pdata->pdev_strm_map = dpcm_strm_map; 734 pdata->strm_map_size = ARRAY_SIZE(dpcm_strm_map); 735 drv->pdata = pdata; 736 drv->pdev = pdev; 737 mutex_init(&drv->lock); 738 dev_set_drvdata(&pdev->dev, drv); 739 740 ret = devm_snd_soc_register_component(&pdev->dev, &sst_soc_platform_drv, 741 sst_platform_dai, ARRAY_SIZE(sst_platform_dai)); 742 if (ret) 743 dev_err(&pdev->dev, "registering cpu dais failed\n"); 744 745 return ret; 746 } 747 748 static int sst_platform_remove(struct platform_device *pdev) 749 { 750 dev_dbg(&pdev->dev, "sst_platform_remove success\n"); 751 return 0; 752 } 753 754 #ifdef CONFIG_PM_SLEEP 755 756 static int sst_soc_prepare(struct device *dev) 757 { 758 struct sst_data *drv = dev_get_drvdata(dev); 759 struct snd_soc_pcm_runtime *rtd; 760 761 if (!drv->soc_card) 762 return 0; 763 764 /* suspend all pcms first */ 765 snd_soc_suspend(drv->soc_card->dev); 766 snd_soc_poweroff(drv->soc_card->dev); 767 768 /* set the SSPs to idle */ 769 for_each_card_rtds(drv->soc_card, rtd) { 770 struct snd_soc_dai *dai = rtd->cpu_dai; 771 772 if (dai->active) { 773 send_ssp_cmd(dai, dai->name, 0); 774 sst_handle_vb_timer(dai, false); 775 } 776 } 777 778 return 0; 779 } 780 781 static void sst_soc_complete(struct device *dev) 782 { 783 struct sst_data *drv = dev_get_drvdata(dev); 784 struct snd_soc_pcm_runtime *rtd; 785 786 if (!drv->soc_card) 787 return; 788 789 /* restart SSPs */ 790 for_each_card_rtds(drv->soc_card, rtd) { 791 struct snd_soc_dai *dai = rtd->cpu_dai; 792 793 if (dai->active) { 794 sst_handle_vb_timer(dai, true); 795 send_ssp_cmd(dai, dai->name, 1); 796 } 797 } 798 snd_soc_resume(drv->soc_card->dev); 799 } 800 801 #else 802 803 #define sst_soc_prepare NULL 804 #define sst_soc_complete NULL 805 806 #endif 807 808 809 static const struct dev_pm_ops sst_platform_pm = { 810 .prepare = sst_soc_prepare, 811 .complete = sst_soc_complete, 812 }; 813 814 static struct platform_driver sst_platform_driver = { 815 .driver = { 816 .name = "sst-mfld-platform", 817 .pm = &sst_platform_pm, 818 }, 819 .probe = sst_platform_probe, 820 .remove = sst_platform_remove, 821 }; 822 823 module_platform_driver(sst_platform_driver); 824 825 MODULE_DESCRIPTION("ASoC Intel(R) MID Platform driver"); 826 MODULE_AUTHOR("Vinod Koul <vinod.koul@intel.com>"); 827 MODULE_AUTHOR("Harsha Priya <priya.harsha@intel.com>"); 828 MODULE_LICENSE("GPL v2"); 829 MODULE_ALIAS("platform:sst-atom-hifi2-platform"); 830 MODULE_ALIAS("platform:sst-mfld-platform"); 831