1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * sst_mfld_platform.c - Intel MID Platform driver 4 * 5 * Copyright (C) 2010-2014 Intel Corp 6 * Author: Vinod Koul <vinod.koul@intel.com> 7 * Author: Harsha Priya <priya.harsha@intel.com> 8 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 9 * 10 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 11 */ 12 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 13 14 #include <linux/slab.h> 15 #include <linux/io.h> 16 #include <linux/module.h> 17 #include <sound/core.h> 18 #include <sound/pcm.h> 19 #include <sound/pcm_params.h> 20 #include <sound/soc.h> 21 #include <sound/compress_driver.h> 22 #include <asm/platform_sst_audio.h> 23 #include "sst-mfld-platform.h" 24 #include "sst-atom-controls.h" 25 26 struct sst_device *sst; 27 static DEFINE_MUTEX(sst_lock); 28 29 int sst_register_dsp(struct sst_device *dev) 30 { 31 if (WARN_ON(!dev)) 32 return -EINVAL; 33 if (!try_module_get(dev->dev->driver->owner)) 34 return -ENODEV; 35 mutex_lock(&sst_lock); 36 if (sst) { 37 dev_err(dev->dev, "we already have a device %s\n", sst->name); 38 module_put(dev->dev->driver->owner); 39 mutex_unlock(&sst_lock); 40 return -EEXIST; 41 } 42 dev_dbg(dev->dev, "registering device %s\n", dev->name); 43 sst = dev; 44 mutex_unlock(&sst_lock); 45 return 0; 46 } 47 EXPORT_SYMBOL_GPL(sst_register_dsp); 48 49 int sst_unregister_dsp(struct sst_device *dev) 50 { 51 if (WARN_ON(!dev)) 52 return -EINVAL; 53 if (dev != sst) 54 return -EINVAL; 55 56 mutex_lock(&sst_lock); 57 58 if (!sst) { 59 mutex_unlock(&sst_lock); 60 return -EIO; 61 } 62 63 module_put(sst->dev->driver->owner); 64 dev_dbg(dev->dev, "unreg %s\n", sst->name); 65 sst = NULL; 66 mutex_unlock(&sst_lock); 67 return 0; 68 } 69 EXPORT_SYMBOL_GPL(sst_unregister_dsp); 70 71 static const struct snd_pcm_hardware sst_platform_pcm_hw = { 72 .info = (SNDRV_PCM_INFO_INTERLEAVED | 73 SNDRV_PCM_INFO_DOUBLE | 74 SNDRV_PCM_INFO_PAUSE | 75 SNDRV_PCM_INFO_RESUME | 76 SNDRV_PCM_INFO_MMAP| 77 SNDRV_PCM_INFO_MMAP_VALID | 78 SNDRV_PCM_INFO_BLOCK_TRANSFER | 79 SNDRV_PCM_INFO_SYNC_START), 80 .buffer_bytes_max = SST_MAX_BUFFER, 81 .period_bytes_min = SST_MIN_PERIOD_BYTES, 82 .period_bytes_max = SST_MAX_PERIOD_BYTES, 83 .periods_min = SST_MIN_PERIODS, 84 .periods_max = SST_MAX_PERIODS, 85 .fifo_size = SST_FIFO_SIZE, 86 }; 87 88 static struct sst_dev_stream_map dpcm_strm_map[] = { 89 {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF}, /* Reserved, not in use */ 90 {MERR_DPCM_AUDIO, 0, SNDRV_PCM_STREAM_PLAYBACK, PIPE_MEDIA1_IN, SST_TASK_ID_MEDIA, 0}, 91 {MERR_DPCM_COMPR, 0, SNDRV_PCM_STREAM_PLAYBACK, PIPE_MEDIA0_IN, SST_TASK_ID_MEDIA, 0}, 92 {MERR_DPCM_AUDIO, 0, SNDRV_PCM_STREAM_CAPTURE, PIPE_PCM1_OUT, SST_TASK_ID_MEDIA, 0}, 93 {MERR_DPCM_DEEP_BUFFER, 0, SNDRV_PCM_STREAM_PLAYBACK, PIPE_MEDIA3_IN, SST_TASK_ID_MEDIA, 0}, 94 }; 95 96 static int sst_media_digital_mute(struct snd_soc_dai *dai, int mute, int stream) 97 { 98 99 return sst_send_pipe_gains(dai, stream, mute); 100 } 101 102 /* helper functions */ 103 void sst_set_stream_status(struct sst_runtime_stream *stream, 104 int state) 105 { 106 unsigned long flags; 107 spin_lock_irqsave(&stream->status_lock, flags); 108 stream->stream_status = state; 109 spin_unlock_irqrestore(&stream->status_lock, flags); 110 } 111 112 static inline int sst_get_stream_status(struct sst_runtime_stream *stream) 113 { 114 int state; 115 unsigned long flags; 116 117 spin_lock_irqsave(&stream->status_lock, flags); 118 state = stream->stream_status; 119 spin_unlock_irqrestore(&stream->status_lock, flags); 120 return state; 121 } 122 123 static void sst_fill_alloc_params(struct snd_pcm_substream *substream, 124 struct snd_sst_alloc_params_ext *alloc_param) 125 { 126 unsigned int channels; 127 snd_pcm_uframes_t period_size; 128 ssize_t periodbytes; 129 ssize_t buffer_bytes = snd_pcm_lib_buffer_bytes(substream); 130 u32 buffer_addr = virt_to_phys(substream->dma_buffer.area); 131 132 channels = substream->runtime->channels; 133 period_size = substream->runtime->period_size; 134 periodbytes = samples_to_bytes(substream->runtime, period_size); 135 alloc_param->ring_buf_info[0].addr = buffer_addr; 136 alloc_param->ring_buf_info[0].size = buffer_bytes; 137 alloc_param->sg_count = 1; 138 alloc_param->reserved = 0; 139 alloc_param->frag_size = periodbytes * channels; 140 141 } 142 static void sst_fill_pcm_params(struct snd_pcm_substream *substream, 143 struct snd_sst_stream_params *param) 144 { 145 param->uc.pcm_params.num_chan = (u8) substream->runtime->channels; 146 param->uc.pcm_params.pcm_wd_sz = substream->runtime->sample_bits; 147 param->uc.pcm_params.sfreq = substream->runtime->rate; 148 149 /* PCM stream via ALSA interface */ 150 param->uc.pcm_params.use_offload_path = 0; 151 param->uc.pcm_params.reserved2 = 0; 152 memset(param->uc.pcm_params.channel_map, 0, sizeof(u8)); 153 154 } 155 156 static int sst_get_stream_mapping(int dev, int sdev, int dir, 157 struct sst_dev_stream_map *map, int size) 158 { 159 int i; 160 161 if (map == NULL) 162 return -EINVAL; 163 164 165 /* index 0 is not used in stream map */ 166 for (i = 1; i < size; i++) { 167 if ((map[i].dev_num == dev) && (map[i].direction == dir)) 168 return i; 169 } 170 return 0; 171 } 172 173 int sst_fill_stream_params(void *substream, 174 const struct sst_data *ctx, struct snd_sst_params *str_params, bool is_compress) 175 { 176 int map_size; 177 int index; 178 struct sst_dev_stream_map *map; 179 struct snd_pcm_substream *pstream = NULL; 180 struct snd_compr_stream *cstream = NULL; 181 182 map = ctx->pdata->pdev_strm_map; 183 map_size = ctx->pdata->strm_map_size; 184 185 if (is_compress) 186 cstream = (struct snd_compr_stream *)substream; 187 else 188 pstream = (struct snd_pcm_substream *)substream; 189 190 str_params->stream_type = SST_STREAM_TYPE_MUSIC; 191 192 /* For pcm streams */ 193 if (pstream) { 194 index = sst_get_stream_mapping(pstream->pcm->device, 195 pstream->number, pstream->stream, 196 map, map_size); 197 if (index <= 0) 198 return -EINVAL; 199 200 str_params->stream_id = index; 201 str_params->device_type = map[index].device_id; 202 str_params->task = map[index].task_id; 203 204 str_params->ops = (u8)pstream->stream; 205 } 206 207 if (cstream) { 208 index = sst_get_stream_mapping(cstream->device->device, 209 0, cstream->direction, 210 map, map_size); 211 if (index <= 0) 212 return -EINVAL; 213 str_params->stream_id = index; 214 str_params->device_type = map[index].device_id; 215 str_params->task = map[index].task_id; 216 217 str_params->ops = (u8)cstream->direction; 218 } 219 return 0; 220 } 221 222 static int sst_platform_alloc_stream(struct snd_pcm_substream *substream, 223 struct snd_soc_dai *dai) 224 { 225 struct sst_runtime_stream *stream = 226 substream->runtime->private_data; 227 struct snd_sst_stream_params param = {{{0,},},}; 228 struct snd_sst_params str_params = {0}; 229 struct snd_sst_alloc_params_ext alloc_params = {0}; 230 int ret_val = 0; 231 struct sst_data *ctx = snd_soc_dai_get_drvdata(dai); 232 233 /* set codec params and inform SST driver the same */ 234 sst_fill_pcm_params(substream, ¶m); 235 sst_fill_alloc_params(substream, &alloc_params); 236 substream->runtime->dma_area = substream->dma_buffer.area; 237 str_params.sparams = param; 238 str_params.aparams = alloc_params; 239 str_params.codec = SST_CODEC_TYPE_PCM; 240 241 /* fill the device type and stream id to pass to SST driver */ 242 ret_val = sst_fill_stream_params(substream, ctx, &str_params, false); 243 if (ret_val < 0) 244 return ret_val; 245 246 stream->stream_info.str_id = str_params.stream_id; 247 248 ret_val = stream->ops->open(sst->dev, &str_params); 249 if (ret_val <= 0) 250 return ret_val; 251 252 253 return ret_val; 254 } 255 256 static void sst_period_elapsed(void *arg) 257 { 258 struct snd_pcm_substream *substream = arg; 259 struct sst_runtime_stream *stream; 260 int status; 261 262 if (!substream || !substream->runtime) 263 return; 264 stream = substream->runtime->private_data; 265 if (!stream) 266 return; 267 status = sst_get_stream_status(stream); 268 if (status != SST_PLATFORM_RUNNING) 269 return; 270 snd_pcm_period_elapsed(substream); 271 } 272 273 static int sst_platform_init_stream(struct snd_pcm_substream *substream) 274 { 275 struct sst_runtime_stream *stream = 276 substream->runtime->private_data; 277 struct snd_soc_pcm_runtime *rtd = substream->private_data; 278 int ret_val; 279 280 dev_dbg(rtd->dev, "setting buffer ptr param\n"); 281 sst_set_stream_status(stream, SST_PLATFORM_INIT); 282 stream->stream_info.period_elapsed = sst_period_elapsed; 283 stream->stream_info.arg = substream; 284 stream->stream_info.buffer_ptr = 0; 285 stream->stream_info.sfreq = substream->runtime->rate; 286 ret_val = stream->ops->stream_init(sst->dev, &stream->stream_info); 287 if (ret_val) 288 dev_err(rtd->dev, "control_set ret error %d\n", ret_val); 289 return ret_val; 290 291 } 292 293 static int power_up_sst(struct sst_runtime_stream *stream) 294 { 295 return stream->ops->power(sst->dev, true); 296 } 297 298 static void power_down_sst(struct sst_runtime_stream *stream) 299 { 300 stream->ops->power(sst->dev, false); 301 } 302 303 static int sst_media_open(struct snd_pcm_substream *substream, 304 struct snd_soc_dai *dai) 305 { 306 int ret_val = 0; 307 struct snd_pcm_runtime *runtime = substream->runtime; 308 struct sst_runtime_stream *stream; 309 310 stream = kzalloc(sizeof(*stream), GFP_KERNEL); 311 if (!stream) 312 return -ENOMEM; 313 spin_lock_init(&stream->status_lock); 314 315 /* get the sst ops */ 316 mutex_lock(&sst_lock); 317 if (!sst || 318 !try_module_get(sst->dev->driver->owner)) { 319 dev_err(dai->dev, "no device available to run\n"); 320 ret_val = -ENODEV; 321 goto out_ops; 322 } 323 stream->ops = sst->ops; 324 mutex_unlock(&sst_lock); 325 326 stream->stream_info.str_id = 0; 327 328 stream->stream_info.arg = substream; 329 /* allocate memory for SST API set */ 330 runtime->private_data = stream; 331 332 ret_val = power_up_sst(stream); 333 if (ret_val < 0) 334 return ret_val; 335 336 /* Make sure, that the period size is always even */ 337 snd_pcm_hw_constraint_step(substream->runtime, 0, 338 SNDRV_PCM_HW_PARAM_PERIODS, 2); 339 340 return snd_pcm_hw_constraint_integer(runtime, 341 SNDRV_PCM_HW_PARAM_PERIODS); 342 out_ops: 343 kfree(stream); 344 mutex_unlock(&sst_lock); 345 return ret_val; 346 } 347 348 static void sst_media_close(struct snd_pcm_substream *substream, 349 struct snd_soc_dai *dai) 350 { 351 struct sst_runtime_stream *stream; 352 int str_id; 353 354 stream = substream->runtime->private_data; 355 power_down_sst(stream); 356 357 str_id = stream->stream_info.str_id; 358 if (str_id) 359 stream->ops->close(sst->dev, str_id); 360 module_put(sst->dev->driver->owner); 361 kfree(stream); 362 } 363 364 static int sst_media_prepare(struct snd_pcm_substream *substream, 365 struct snd_soc_dai *dai) 366 { 367 struct sst_runtime_stream *stream; 368 int ret_val = 0, str_id; 369 370 stream = substream->runtime->private_data; 371 str_id = stream->stream_info.str_id; 372 if (stream->stream_info.str_id) { 373 ret_val = stream->ops->stream_drop(sst->dev, str_id); 374 return ret_val; 375 } 376 377 ret_val = sst_platform_alloc_stream(substream, dai); 378 if (ret_val <= 0) 379 return ret_val; 380 snprintf(substream->pcm->id, sizeof(substream->pcm->id), 381 "%d", stream->stream_info.str_id); 382 383 ret_val = sst_platform_init_stream(substream); 384 if (ret_val) 385 return ret_val; 386 substream->runtime->hw.info = SNDRV_PCM_INFO_BLOCK_TRANSFER; 387 return ret_val; 388 } 389 390 static int sst_media_hw_params(struct snd_pcm_substream *substream, 391 struct snd_pcm_hw_params *params, 392 struct snd_soc_dai *dai) 393 { 394 int ret; 395 396 ret = 397 snd_pcm_lib_malloc_pages(substream, 398 params_buffer_bytes(params)); 399 if (ret) 400 return ret; 401 memset(substream->runtime->dma_area, 0, params_buffer_bytes(params)); 402 return 0; 403 } 404 405 static int sst_media_hw_free(struct snd_pcm_substream *substream, 406 struct snd_soc_dai *dai) 407 { 408 return snd_pcm_lib_free_pages(substream); 409 } 410 411 static int sst_enable_ssp(struct snd_pcm_substream *substream, 412 struct snd_soc_dai *dai) 413 { 414 int ret = 0; 415 416 if (!dai->active) { 417 ret = sst_handle_vb_timer(dai, true); 418 sst_fill_ssp_defaults(dai); 419 } 420 return ret; 421 } 422 423 static int sst_be_hw_params(struct snd_pcm_substream *substream, 424 struct snd_pcm_hw_params *params, 425 struct snd_soc_dai *dai) 426 { 427 int ret = 0; 428 429 if (dai->active == 1) 430 ret = send_ssp_cmd(dai, dai->name, 1); 431 return ret; 432 } 433 434 static int sst_set_format(struct snd_soc_dai *dai, unsigned int fmt) 435 { 436 int ret = 0; 437 438 if (!dai->active) 439 return 0; 440 441 ret = sst_fill_ssp_config(dai, fmt); 442 if (ret < 0) 443 dev_err(dai->dev, "sst_set_format failed..\n"); 444 445 return ret; 446 } 447 448 static int sst_platform_set_ssp_slot(struct snd_soc_dai *dai, 449 unsigned int tx_mask, unsigned int rx_mask, 450 int slots, int slot_width) { 451 int ret = 0; 452 453 if (!dai->active) 454 return ret; 455 456 ret = sst_fill_ssp_slot(dai, tx_mask, rx_mask, slots, slot_width); 457 if (ret < 0) 458 dev_err(dai->dev, "sst_fill_ssp_slot failed..%d\n", ret); 459 460 return ret; 461 } 462 463 static void sst_disable_ssp(struct snd_pcm_substream *substream, 464 struct snd_soc_dai *dai) 465 { 466 if (!dai->active) { 467 send_ssp_cmd(dai, dai->name, 0); 468 sst_handle_vb_timer(dai, false); 469 } 470 } 471 472 static const struct snd_soc_dai_ops sst_media_dai_ops = { 473 .startup = sst_media_open, 474 .shutdown = sst_media_close, 475 .prepare = sst_media_prepare, 476 .hw_params = sst_media_hw_params, 477 .hw_free = sst_media_hw_free, 478 .mute_stream = sst_media_digital_mute, 479 }; 480 481 static const struct snd_soc_dai_ops sst_compr_dai_ops = { 482 .mute_stream = sst_media_digital_mute, 483 }; 484 485 static const struct snd_soc_dai_ops sst_be_dai_ops = { 486 .startup = sst_enable_ssp, 487 .hw_params = sst_be_hw_params, 488 .set_fmt = sst_set_format, 489 .set_tdm_slot = sst_platform_set_ssp_slot, 490 .shutdown = sst_disable_ssp, 491 }; 492 493 static struct snd_soc_dai_driver sst_platform_dai[] = { 494 { 495 .name = "media-cpu-dai", 496 .ops = &sst_media_dai_ops, 497 .playback = { 498 .stream_name = "Headset Playback", 499 .channels_min = SST_STEREO, 500 .channels_max = SST_STEREO, 501 .rates = SNDRV_PCM_RATE_44100|SNDRV_PCM_RATE_48000, 502 .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE, 503 }, 504 .capture = { 505 .stream_name = "Headset Capture", 506 .channels_min = 1, 507 .channels_max = 2, 508 .rates = SNDRV_PCM_RATE_44100|SNDRV_PCM_RATE_48000, 509 .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE, 510 }, 511 }, 512 { 513 .name = "deepbuffer-cpu-dai", 514 .ops = &sst_media_dai_ops, 515 .playback = { 516 .stream_name = "Deepbuffer Playback", 517 .channels_min = SST_STEREO, 518 .channels_max = SST_STEREO, 519 .rates = SNDRV_PCM_RATE_44100|SNDRV_PCM_RATE_48000, 520 .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE, 521 }, 522 }, 523 { 524 .name = "compress-cpu-dai", 525 .compress_new = snd_soc_new_compress, 526 .ops = &sst_compr_dai_ops, 527 .playback = { 528 .stream_name = "Compress Playback", 529 .channels_min = 1, 530 }, 531 }, 532 /* BE CPU Dais */ 533 { 534 .name = "ssp0-port", 535 .ops = &sst_be_dai_ops, 536 .playback = { 537 .stream_name = "ssp0 Tx", 538 .channels_min = SST_STEREO, 539 .channels_max = SST_STEREO, 540 .rates = SNDRV_PCM_RATE_48000, 541 .formats = SNDRV_PCM_FMTBIT_S16_LE, 542 }, 543 .capture = { 544 .stream_name = "ssp0 Rx", 545 .channels_min = SST_STEREO, 546 .channels_max = SST_STEREO, 547 .rates = SNDRV_PCM_RATE_48000, 548 .formats = SNDRV_PCM_FMTBIT_S16_LE, 549 }, 550 }, 551 { 552 .name = "ssp1-port", 553 .ops = &sst_be_dai_ops, 554 .playback = { 555 .stream_name = "ssp1 Tx", 556 .channels_min = SST_STEREO, 557 .channels_max = SST_STEREO, 558 .rates = SNDRV_PCM_RATE_8000|SNDRV_PCM_RATE_16000|SNDRV_PCM_RATE_48000, 559 .formats = SNDRV_PCM_FMTBIT_S16_LE, 560 }, 561 .capture = { 562 .stream_name = "ssp1 Rx", 563 .channels_min = SST_STEREO, 564 .channels_max = SST_STEREO, 565 .rates = SNDRV_PCM_RATE_8000|SNDRV_PCM_RATE_16000|SNDRV_PCM_RATE_48000, 566 .formats = SNDRV_PCM_FMTBIT_S16_LE, 567 }, 568 }, 569 { 570 .name = "ssp2-port", 571 .ops = &sst_be_dai_ops, 572 .playback = { 573 .stream_name = "ssp2 Tx", 574 .channels_min = SST_STEREO, 575 .channels_max = SST_STEREO, 576 .rates = SNDRV_PCM_RATE_48000, 577 .formats = SNDRV_PCM_FMTBIT_S16_LE, 578 }, 579 .capture = { 580 .stream_name = "ssp2 Rx", 581 .channels_min = SST_STEREO, 582 .channels_max = SST_STEREO, 583 .rates = SNDRV_PCM_RATE_48000, 584 .formats = SNDRV_PCM_FMTBIT_S16_LE, 585 }, 586 }, 587 }; 588 589 static int sst_soc_open(struct snd_soc_component *component, 590 struct snd_pcm_substream *substream) 591 { 592 struct snd_pcm_runtime *runtime; 593 594 if (substream->pcm->internal) 595 return 0; 596 597 runtime = substream->runtime; 598 runtime->hw = sst_platform_pcm_hw; 599 return 0; 600 } 601 602 static int sst_soc_trigger(struct snd_soc_component *component, 603 struct snd_pcm_substream *substream, int cmd) 604 { 605 int ret_val = 0, str_id; 606 struct sst_runtime_stream *stream; 607 int status; 608 struct snd_soc_pcm_runtime *rtd = substream->private_data; 609 610 dev_dbg(rtd->dev, "%s called\n", __func__); 611 if (substream->pcm->internal) 612 return 0; 613 stream = substream->runtime->private_data; 614 str_id = stream->stream_info.str_id; 615 switch (cmd) { 616 case SNDRV_PCM_TRIGGER_START: 617 dev_dbg(rtd->dev, "sst: Trigger Start\n"); 618 status = SST_PLATFORM_RUNNING; 619 stream->stream_info.arg = substream; 620 ret_val = stream->ops->stream_start(sst->dev, str_id); 621 break; 622 case SNDRV_PCM_TRIGGER_STOP: 623 dev_dbg(rtd->dev, "sst: in stop\n"); 624 status = SST_PLATFORM_DROPPED; 625 ret_val = stream->ops->stream_drop(sst->dev, str_id); 626 break; 627 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 628 case SNDRV_PCM_TRIGGER_SUSPEND: 629 dev_dbg(rtd->dev, "sst: in pause\n"); 630 status = SST_PLATFORM_PAUSED; 631 ret_val = stream->ops->stream_pause(sst->dev, str_id); 632 break; 633 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 634 case SNDRV_PCM_TRIGGER_RESUME: 635 dev_dbg(rtd->dev, "sst: in pause release\n"); 636 status = SST_PLATFORM_RUNNING; 637 ret_val = stream->ops->stream_pause_release(sst->dev, str_id); 638 break; 639 default: 640 return -EINVAL; 641 } 642 643 if (!ret_val) 644 sst_set_stream_status(stream, status); 645 646 return ret_val; 647 } 648 649 650 static snd_pcm_uframes_t sst_soc_pointer(struct snd_soc_component *component, 651 struct snd_pcm_substream *substream) 652 { 653 struct sst_runtime_stream *stream; 654 int ret_val, status; 655 struct pcm_stream_info *str_info; 656 struct snd_soc_pcm_runtime *rtd = substream->private_data; 657 658 stream = substream->runtime->private_data; 659 status = sst_get_stream_status(stream); 660 if (status == SST_PLATFORM_INIT) 661 return 0; 662 str_info = &stream->stream_info; 663 ret_val = stream->ops->stream_read_tstamp(sst->dev, str_info); 664 if (ret_val) { 665 dev_err(rtd->dev, "sst: error code = %d\n", ret_val); 666 return ret_val; 667 } 668 substream->runtime->delay = str_info->pcm_delay; 669 return str_info->buffer_ptr; 670 } 671 672 static int sst_soc_pcm_new(struct snd_soc_component *component, 673 struct snd_soc_pcm_runtime *rtd) 674 { 675 struct snd_soc_dai *dai = rtd->cpu_dai; 676 struct snd_pcm *pcm = rtd->pcm; 677 678 if (dai->driver->playback.channels_min || 679 dai->driver->capture.channels_min) { 680 snd_pcm_lib_preallocate_pages_for_all(pcm, 681 SNDRV_DMA_TYPE_CONTINUOUS, 682 snd_dma_continuous_data(GFP_DMA), 683 SST_MIN_BUFFER, SST_MAX_BUFFER); 684 } 685 return 0; 686 } 687 688 static int sst_soc_probe(struct snd_soc_component *component) 689 { 690 struct sst_data *drv = dev_get_drvdata(component->dev); 691 692 drv->soc_card = component->card; 693 return sst_dsp_init_v2_dpcm(component); 694 } 695 696 static void sst_soc_remove(struct snd_soc_component *component) 697 { 698 struct sst_data *drv = dev_get_drvdata(component->dev); 699 700 drv->soc_card = NULL; 701 } 702 703 static const struct snd_soc_component_driver sst_soc_platform_drv = { 704 .name = DRV_NAME, 705 .probe = sst_soc_probe, 706 .remove = sst_soc_remove, 707 .open = sst_soc_open, 708 .ioctl = snd_soc_pcm_lib_ioctl, 709 .trigger = sst_soc_trigger, 710 .pointer = sst_soc_pointer, 711 .compr_ops = &sst_platform_compr_ops, 712 .pcm_construct = sst_soc_pcm_new, 713 }; 714 715 static int sst_platform_probe(struct platform_device *pdev) 716 { 717 struct sst_data *drv; 718 int ret; 719 struct sst_platform_data *pdata; 720 721 drv = devm_kzalloc(&pdev->dev, sizeof(*drv), GFP_KERNEL); 722 if (drv == NULL) { 723 return -ENOMEM; 724 } 725 726 pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL); 727 if (pdata == NULL) { 728 return -ENOMEM; 729 } 730 731 pdata->pdev_strm_map = dpcm_strm_map; 732 pdata->strm_map_size = ARRAY_SIZE(dpcm_strm_map); 733 drv->pdata = pdata; 734 drv->pdev = pdev; 735 mutex_init(&drv->lock); 736 dev_set_drvdata(&pdev->dev, drv); 737 738 ret = devm_snd_soc_register_component(&pdev->dev, &sst_soc_platform_drv, 739 sst_platform_dai, ARRAY_SIZE(sst_platform_dai)); 740 if (ret) 741 dev_err(&pdev->dev, "registering cpu dais failed\n"); 742 743 return ret; 744 } 745 746 static int sst_platform_remove(struct platform_device *pdev) 747 { 748 dev_dbg(&pdev->dev, "sst_platform_remove success\n"); 749 return 0; 750 } 751 752 #ifdef CONFIG_PM_SLEEP 753 754 static int sst_soc_prepare(struct device *dev) 755 { 756 struct sst_data *drv = dev_get_drvdata(dev); 757 struct snd_soc_pcm_runtime *rtd; 758 759 if (!drv->soc_card) 760 return 0; 761 762 /* suspend all pcms first */ 763 snd_soc_suspend(drv->soc_card->dev); 764 snd_soc_poweroff(drv->soc_card->dev); 765 766 /* set the SSPs to idle */ 767 for_each_card_rtds(drv->soc_card, rtd) { 768 struct snd_soc_dai *dai = rtd->cpu_dai; 769 770 if (dai->active) { 771 send_ssp_cmd(dai, dai->name, 0); 772 sst_handle_vb_timer(dai, false); 773 } 774 } 775 776 return 0; 777 } 778 779 static void sst_soc_complete(struct device *dev) 780 { 781 struct sst_data *drv = dev_get_drvdata(dev); 782 struct snd_soc_pcm_runtime *rtd; 783 784 if (!drv->soc_card) 785 return; 786 787 /* restart SSPs */ 788 for_each_card_rtds(drv->soc_card, rtd) { 789 struct snd_soc_dai *dai = rtd->cpu_dai; 790 791 if (dai->active) { 792 sst_handle_vb_timer(dai, true); 793 send_ssp_cmd(dai, dai->name, 1); 794 } 795 } 796 snd_soc_resume(drv->soc_card->dev); 797 } 798 799 #else 800 801 #define sst_soc_prepare NULL 802 #define sst_soc_complete NULL 803 804 #endif 805 806 807 static const struct dev_pm_ops sst_platform_pm = { 808 .prepare = sst_soc_prepare, 809 .complete = sst_soc_complete, 810 }; 811 812 static struct platform_driver sst_platform_driver = { 813 .driver = { 814 .name = "sst-mfld-platform", 815 .pm = &sst_platform_pm, 816 }, 817 .probe = sst_platform_probe, 818 .remove = sst_platform_remove, 819 }; 820 821 module_platform_driver(sst_platform_driver); 822 823 MODULE_DESCRIPTION("ASoC Intel(R) MID Platform driver"); 824 MODULE_AUTHOR("Vinod Koul <vinod.koul@intel.com>"); 825 MODULE_AUTHOR("Harsha Priya <priya.harsha@intel.com>"); 826 MODULE_LICENSE("GPL v2"); 827 MODULE_ALIAS("platform:sst-atom-hifi2-platform"); 828 MODULE_ALIAS("platform:sst-mfld-platform"); 829