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 = substream->runtime->dma_addr; 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 str_params.sparams = param; 237 str_params.aparams = alloc_params; 238 str_params.codec = SST_CODEC_TYPE_PCM; 239 240 /* fill the device type and stream id to pass to SST driver */ 241 ret_val = sst_fill_stream_params(substream, ctx, &str_params, false); 242 if (ret_val < 0) 243 return ret_val; 244 245 stream->stream_info.str_id = str_params.stream_id; 246 247 ret_val = stream->ops->open(sst->dev, &str_params); 248 if (ret_val <= 0) 249 return ret_val; 250 251 252 return ret_val; 253 } 254 255 static void sst_period_elapsed(void *arg) 256 { 257 struct snd_pcm_substream *substream = arg; 258 struct sst_runtime_stream *stream; 259 int status; 260 261 if (!substream || !substream->runtime) 262 return; 263 stream = substream->runtime->private_data; 264 if (!stream) 265 return; 266 status = sst_get_stream_status(stream); 267 if (status != SST_PLATFORM_RUNNING) 268 return; 269 snd_pcm_period_elapsed(substream); 270 } 271 272 static int sst_platform_init_stream(struct snd_pcm_substream *substream) 273 { 274 struct sst_runtime_stream *stream = 275 substream->runtime->private_data; 276 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 277 int ret_val; 278 279 dev_dbg(rtd->dev, "setting buffer ptr param\n"); 280 sst_set_stream_status(stream, SST_PLATFORM_INIT); 281 stream->stream_info.period_elapsed = sst_period_elapsed; 282 stream->stream_info.arg = substream; 283 stream->stream_info.buffer_ptr = 0; 284 stream->stream_info.sfreq = substream->runtime->rate; 285 ret_val = stream->ops->stream_init(sst->dev, &stream->stream_info); 286 if (ret_val) 287 dev_err(rtd->dev, "control_set ret error %d\n", ret_val); 288 return ret_val; 289 290 } 291 292 static int power_up_sst(struct sst_runtime_stream *stream) 293 { 294 return stream->ops->power(sst->dev, true); 295 } 296 297 static void power_down_sst(struct sst_runtime_stream *stream) 298 { 299 stream->ops->power(sst->dev, false); 300 } 301 302 static int sst_media_open(struct snd_pcm_substream *substream, 303 struct snd_soc_dai *dai) 304 { 305 int ret_val = 0; 306 struct snd_pcm_runtime *runtime = substream->runtime; 307 struct sst_runtime_stream *stream; 308 309 stream = kzalloc(sizeof(*stream), GFP_KERNEL); 310 if (!stream) 311 return -ENOMEM; 312 spin_lock_init(&stream->status_lock); 313 314 /* get the sst ops */ 315 mutex_lock(&sst_lock); 316 if (!sst || 317 !try_module_get(sst->dev->driver->owner)) { 318 dev_err(dai->dev, "no device available to run\n"); 319 ret_val = -ENODEV; 320 goto out_ops; 321 } 322 stream->ops = sst->ops; 323 mutex_unlock(&sst_lock); 324 325 stream->stream_info.str_id = 0; 326 327 stream->stream_info.arg = substream; 328 /* allocate memory for SST API set */ 329 runtime->private_data = stream; 330 331 ret_val = power_up_sst(stream); 332 if (ret_val < 0) 333 goto out_power_up; 334 335 /* 336 * Make sure the period to be multiple of 1ms to align the 337 * design of firmware. Apply same rule to buffer size to make 338 * sure alsa could always find a value for period size 339 * regardless the buffer size given by user space. 340 */ 341 snd_pcm_hw_constraint_step(substream->runtime, 0, 342 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, 48); 343 snd_pcm_hw_constraint_step(substream->runtime, 0, 344 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, 48); 345 346 /* Make sure, that the period size is always even */ 347 snd_pcm_hw_constraint_step(substream->runtime, 0, 348 SNDRV_PCM_HW_PARAM_PERIODS, 2); 349 350 return snd_pcm_hw_constraint_integer(runtime, 351 SNDRV_PCM_HW_PARAM_PERIODS); 352 out_ops: 353 mutex_unlock(&sst_lock); 354 out_power_up: 355 kfree(stream); 356 return ret_val; 357 } 358 359 static void sst_media_close(struct snd_pcm_substream *substream, 360 struct snd_soc_dai *dai) 361 { 362 struct sst_runtime_stream *stream; 363 int str_id; 364 365 stream = substream->runtime->private_data; 366 power_down_sst(stream); 367 368 str_id = stream->stream_info.str_id; 369 if (str_id) 370 stream->ops->close(sst->dev, str_id); 371 module_put(sst->dev->driver->owner); 372 kfree(stream); 373 } 374 375 static int sst_media_prepare(struct snd_pcm_substream *substream, 376 struct snd_soc_dai *dai) 377 { 378 struct sst_runtime_stream *stream; 379 int ret_val, str_id; 380 381 stream = substream->runtime->private_data; 382 str_id = stream->stream_info.str_id; 383 if (stream->stream_info.str_id) { 384 ret_val = stream->ops->stream_drop(sst->dev, str_id); 385 return ret_val; 386 } 387 388 ret_val = sst_platform_alloc_stream(substream, dai); 389 if (ret_val <= 0) 390 return ret_val; 391 snprintf(substream->pcm->id, sizeof(substream->pcm->id), 392 "%d", stream->stream_info.str_id); 393 394 ret_val = sst_platform_init_stream(substream); 395 if (ret_val) 396 return ret_val; 397 substream->runtime->hw.info = SNDRV_PCM_INFO_BLOCK_TRANSFER; 398 return 0; 399 } 400 401 static int sst_enable_ssp(struct snd_pcm_substream *substream, 402 struct snd_soc_dai *dai) 403 { 404 int ret = 0; 405 406 if (!snd_soc_dai_active(dai)) { 407 ret = sst_handle_vb_timer(dai, true); 408 sst_fill_ssp_defaults(dai); 409 } 410 return ret; 411 } 412 413 static int sst_be_hw_params(struct snd_pcm_substream *substream, 414 struct snd_pcm_hw_params *params, 415 struct snd_soc_dai *dai) 416 { 417 int ret = 0; 418 419 if (snd_soc_dai_active(dai) == 1) 420 ret = send_ssp_cmd(dai, dai->name, 1); 421 return ret; 422 } 423 424 static int sst_set_format(struct snd_soc_dai *dai, unsigned int fmt) 425 { 426 int ret = 0; 427 428 if (!snd_soc_dai_active(dai)) 429 return 0; 430 431 ret = sst_fill_ssp_config(dai, fmt); 432 if (ret < 0) 433 dev_err(dai->dev, "sst_set_format failed..\n"); 434 435 return ret; 436 } 437 438 static int sst_platform_set_ssp_slot(struct snd_soc_dai *dai, 439 unsigned int tx_mask, unsigned int rx_mask, 440 int slots, int slot_width) { 441 int ret = 0; 442 443 if (!snd_soc_dai_active(dai)) 444 return ret; 445 446 ret = sst_fill_ssp_slot(dai, tx_mask, rx_mask, slots, slot_width); 447 if (ret < 0) 448 dev_err(dai->dev, "sst_fill_ssp_slot failed..%d\n", ret); 449 450 return ret; 451 } 452 453 static void sst_disable_ssp(struct snd_pcm_substream *substream, 454 struct snd_soc_dai *dai) 455 { 456 if (!snd_soc_dai_active(dai)) { 457 send_ssp_cmd(dai, dai->name, 0); 458 sst_handle_vb_timer(dai, false); 459 } 460 } 461 462 static const struct snd_soc_dai_ops sst_media_dai_ops = { 463 .startup = sst_media_open, 464 .shutdown = sst_media_close, 465 .prepare = sst_media_prepare, 466 .mute_stream = sst_media_digital_mute, 467 }; 468 469 static const struct snd_soc_dai_ops sst_compr_dai_ops = { 470 .compress_new = snd_soc_new_compress, 471 .mute_stream = sst_media_digital_mute, 472 }; 473 474 static const struct snd_soc_dai_ops sst_be_dai_ops = { 475 .startup = sst_enable_ssp, 476 .hw_params = sst_be_hw_params, 477 .set_fmt = sst_set_format, 478 .set_tdm_slot = sst_platform_set_ssp_slot, 479 .shutdown = sst_disable_ssp, 480 }; 481 482 static struct snd_soc_dai_driver sst_platform_dai[] = { 483 { 484 .name = "media-cpu-dai", 485 .ops = &sst_media_dai_ops, 486 .playback = { 487 .stream_name = "Headset Playback", 488 .channels_min = SST_STEREO, 489 .channels_max = SST_STEREO, 490 .rates = SNDRV_PCM_RATE_48000, 491 .formats = SNDRV_PCM_FMTBIT_S16_LE, 492 }, 493 .capture = { 494 .stream_name = "Headset Capture", 495 .channels_min = 1, 496 .channels_max = 2, 497 .rates = SNDRV_PCM_RATE_48000, 498 .formats = SNDRV_PCM_FMTBIT_S16_LE, 499 }, 500 }, 501 { 502 .name = "deepbuffer-cpu-dai", 503 .ops = &sst_media_dai_ops, 504 .playback = { 505 .stream_name = "Deepbuffer Playback", 506 .channels_min = SST_STEREO, 507 .channels_max = SST_STEREO, 508 .rates = SNDRV_PCM_RATE_48000, 509 .formats = SNDRV_PCM_FMTBIT_S16_LE, 510 }, 511 }, 512 { 513 .name = "compress-cpu-dai", 514 .ops = &sst_compr_dai_ops, 515 .playback = { 516 .stream_name = "Compress Playback", 517 .channels_min = 1, 518 }, 519 }, 520 /* BE CPU Dais */ 521 { 522 .name = "ssp0-port", 523 .ops = &sst_be_dai_ops, 524 .playback = { 525 .stream_name = "ssp0 Tx", 526 .channels_min = SST_STEREO, 527 .channels_max = SST_STEREO, 528 .rates = SNDRV_PCM_RATE_48000, 529 .formats = SNDRV_PCM_FMTBIT_S16_LE, 530 }, 531 .capture = { 532 .stream_name = "ssp0 Rx", 533 .channels_min = SST_STEREO, 534 .channels_max = SST_STEREO, 535 .rates = SNDRV_PCM_RATE_48000, 536 .formats = SNDRV_PCM_FMTBIT_S16_LE, 537 }, 538 }, 539 { 540 .name = "ssp1-port", 541 .ops = &sst_be_dai_ops, 542 .playback = { 543 .stream_name = "ssp1 Tx", 544 .channels_min = SST_STEREO, 545 .channels_max = SST_STEREO, 546 .rates = SNDRV_PCM_RATE_8000|SNDRV_PCM_RATE_16000|SNDRV_PCM_RATE_48000, 547 .formats = SNDRV_PCM_FMTBIT_S16_LE, 548 }, 549 .capture = { 550 .stream_name = "ssp1 Rx", 551 .channels_min = SST_STEREO, 552 .channels_max = SST_STEREO, 553 .rates = SNDRV_PCM_RATE_8000|SNDRV_PCM_RATE_16000|SNDRV_PCM_RATE_48000, 554 .formats = SNDRV_PCM_FMTBIT_S16_LE, 555 }, 556 }, 557 { 558 .name = "ssp2-port", 559 .ops = &sst_be_dai_ops, 560 .playback = { 561 .stream_name = "ssp2 Tx", 562 .channels_min = SST_STEREO, 563 .channels_max = SST_STEREO, 564 .rates = SNDRV_PCM_RATE_48000, 565 .formats = SNDRV_PCM_FMTBIT_S16_LE, 566 }, 567 .capture = { 568 .stream_name = "ssp2 Rx", 569 .channels_min = SST_STEREO, 570 .channels_max = SST_STEREO, 571 .rates = SNDRV_PCM_RATE_48000, 572 .formats = SNDRV_PCM_FMTBIT_S16_LE, 573 }, 574 }, 575 }; 576 577 static int sst_soc_open(struct snd_soc_component *component, 578 struct snd_pcm_substream *substream) 579 { 580 struct snd_pcm_runtime *runtime; 581 582 if (substream->pcm->internal) 583 return 0; 584 585 runtime = substream->runtime; 586 runtime->hw = sst_platform_pcm_hw; 587 return 0; 588 } 589 590 static int sst_soc_trigger(struct snd_soc_component *component, 591 struct snd_pcm_substream *substream, int cmd) 592 { 593 int ret_val = 0, str_id; 594 struct sst_runtime_stream *stream; 595 int status; 596 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 597 598 dev_dbg(rtd->dev, "%s called\n", __func__); 599 if (substream->pcm->internal) 600 return 0; 601 stream = substream->runtime->private_data; 602 str_id = stream->stream_info.str_id; 603 switch (cmd) { 604 case SNDRV_PCM_TRIGGER_START: 605 dev_dbg(rtd->dev, "sst: Trigger Start\n"); 606 status = SST_PLATFORM_RUNNING; 607 stream->stream_info.arg = substream; 608 ret_val = stream->ops->stream_start(sst->dev, str_id); 609 break; 610 case SNDRV_PCM_TRIGGER_STOP: 611 dev_dbg(rtd->dev, "sst: in stop\n"); 612 status = SST_PLATFORM_DROPPED; 613 ret_val = stream->ops->stream_drop(sst->dev, str_id); 614 break; 615 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 616 case SNDRV_PCM_TRIGGER_SUSPEND: 617 dev_dbg(rtd->dev, "sst: in pause\n"); 618 status = SST_PLATFORM_PAUSED; 619 ret_val = stream->ops->stream_pause(sst->dev, str_id); 620 break; 621 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 622 case SNDRV_PCM_TRIGGER_RESUME: 623 dev_dbg(rtd->dev, "sst: in pause release\n"); 624 status = SST_PLATFORM_RUNNING; 625 ret_val = stream->ops->stream_pause_release(sst->dev, str_id); 626 break; 627 default: 628 return -EINVAL; 629 } 630 631 if (!ret_val) 632 sst_set_stream_status(stream, status); 633 634 return ret_val; 635 } 636 637 638 static snd_pcm_uframes_t sst_soc_pointer(struct snd_soc_component *component, 639 struct snd_pcm_substream *substream) 640 { 641 struct sst_runtime_stream *stream; 642 int ret_val, status; 643 struct pcm_stream_info *str_info; 644 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 645 646 stream = substream->runtime->private_data; 647 status = sst_get_stream_status(stream); 648 if (status == SST_PLATFORM_INIT) 649 return 0; 650 str_info = &stream->stream_info; 651 ret_val = stream->ops->stream_read_tstamp(sst->dev, str_info); 652 if (ret_val) { 653 dev_err(rtd->dev, "sst: error code = %d\n", ret_val); 654 return ret_val; 655 } 656 return str_info->buffer_ptr; 657 } 658 659 static snd_pcm_sframes_t sst_soc_delay(struct snd_soc_component *component, 660 struct snd_pcm_substream *substream) 661 { 662 struct sst_runtime_stream *stream = substream->runtime->private_data; 663 struct pcm_stream_info *str_info = &stream->stream_info; 664 665 if (sst_get_stream_status(stream) == SST_PLATFORM_INIT) 666 return 0; 667 668 return str_info->pcm_delay; 669 } 670 671 static int sst_soc_pcm_new(struct snd_soc_component *component, 672 struct snd_soc_pcm_runtime *rtd) 673 { 674 struct snd_soc_dai *dai = asoc_rtd_to_cpu(rtd, 0); 675 struct snd_pcm *pcm = rtd->pcm; 676 677 if (dai->driver->playback.channels_min || 678 dai->driver->capture.channels_min) { 679 snd_pcm_set_managed_buffer_all(pcm, SNDRV_DMA_TYPE_DEV, 680 pcm->card->dev, 681 SST_MIN_BUFFER, SST_MAX_BUFFER); 682 } 683 return 0; 684 } 685 686 static int sst_soc_probe(struct snd_soc_component *component) 687 { 688 struct sst_data *drv = dev_get_drvdata(component->dev); 689 690 drv->soc_card = component->card; 691 return sst_dsp_init_v2_dpcm(component); 692 } 693 694 static void sst_soc_remove(struct snd_soc_component *component) 695 { 696 struct sst_data *drv = dev_get_drvdata(component->dev); 697 698 drv->soc_card = NULL; 699 } 700 701 static const struct snd_soc_component_driver sst_soc_platform_drv = { 702 .name = DRV_NAME, 703 .probe = sst_soc_probe, 704 .remove = sst_soc_remove, 705 .open = sst_soc_open, 706 .trigger = sst_soc_trigger, 707 .pointer = sst_soc_pointer, 708 .delay = sst_soc_delay, 709 .compress_ops = &sst_platform_compress_ops, 710 .pcm_construct = sst_soc_pcm_new, 711 }; 712 713 static int sst_platform_probe(struct platform_device *pdev) 714 { 715 struct sst_data *drv; 716 int ret; 717 struct sst_platform_data *pdata; 718 719 drv = devm_kzalloc(&pdev->dev, sizeof(*drv), GFP_KERNEL); 720 if (drv == NULL) { 721 return -ENOMEM; 722 } 723 724 pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL); 725 if (pdata == NULL) { 726 return -ENOMEM; 727 } 728 729 pdata->pdev_strm_map = dpcm_strm_map; 730 pdata->strm_map_size = ARRAY_SIZE(dpcm_strm_map); 731 drv->pdata = pdata; 732 drv->pdev = pdev; 733 mutex_init(&drv->lock); 734 dev_set_drvdata(&pdev->dev, drv); 735 736 ret = devm_snd_soc_register_component(&pdev->dev, &sst_soc_platform_drv, 737 sst_platform_dai, ARRAY_SIZE(sst_platform_dai)); 738 if (ret) 739 dev_err(&pdev->dev, "registering cpu dais failed\n"); 740 741 return ret; 742 } 743 744 static void sst_platform_remove(struct platform_device *pdev) 745 { 746 dev_dbg(&pdev->dev, "sst_platform_remove success\n"); 747 } 748 749 #ifdef CONFIG_PM_SLEEP 750 751 static int sst_soc_prepare(struct device *dev) 752 { 753 struct sst_data *drv = dev_get_drvdata(dev); 754 struct snd_soc_pcm_runtime *rtd; 755 756 if (!drv->soc_card) 757 return 0; 758 759 /* suspend all pcms first */ 760 snd_soc_suspend(drv->soc_card->dev); 761 snd_soc_poweroff(drv->soc_card->dev); 762 763 /* set the SSPs to idle */ 764 for_each_card_rtds(drv->soc_card, rtd) { 765 struct snd_soc_dai *dai = asoc_rtd_to_cpu(rtd, 0); 766 767 if (snd_soc_dai_active(dai)) { 768 send_ssp_cmd(dai, dai->name, 0); 769 sst_handle_vb_timer(dai, false); 770 } 771 } 772 773 return 0; 774 } 775 776 static void sst_soc_complete(struct device *dev) 777 { 778 struct sst_data *drv = dev_get_drvdata(dev); 779 struct snd_soc_pcm_runtime *rtd; 780 781 if (!drv->soc_card) 782 return; 783 784 /* restart SSPs */ 785 for_each_card_rtds(drv->soc_card, rtd) { 786 struct snd_soc_dai *dai = asoc_rtd_to_cpu(rtd, 0); 787 788 if (snd_soc_dai_active(dai)) { 789 sst_handle_vb_timer(dai, true); 790 send_ssp_cmd(dai, dai->name, 1); 791 } 792 } 793 snd_soc_resume(drv->soc_card->dev); 794 } 795 796 #else 797 798 #define sst_soc_prepare NULL 799 #define sst_soc_complete NULL 800 801 #endif 802 803 804 static const struct dev_pm_ops sst_platform_pm = { 805 .prepare = sst_soc_prepare, 806 .complete = sst_soc_complete, 807 }; 808 809 static struct platform_driver sst_platform_driver = { 810 .driver = { 811 .name = "sst-mfld-platform", 812 .pm = &sst_platform_pm, 813 }, 814 .probe = sst_platform_probe, 815 .remove_new = sst_platform_remove, 816 }; 817 818 module_platform_driver(sst_platform_driver); 819 820 MODULE_DESCRIPTION("ASoC Intel(R) MID Platform driver"); 821 MODULE_AUTHOR("Vinod Koul <vinod.koul@intel.com>"); 822 MODULE_AUTHOR("Harsha Priya <priya.harsha@intel.com>"); 823 MODULE_LICENSE("GPL v2"); 824 MODULE_ALIAS("platform:sst-atom-hifi2-platform"); 825 MODULE_ALIAS("platform:sst-mfld-platform"); 826