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 = asoc_substream_to_rtd(substream); 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 goto out_power_up; 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 mutex_unlock(&sst_lock); 344 out_power_up: 345 kfree(stream); 346 return ret_val; 347 } 348 349 static void sst_media_close(struct snd_pcm_substream *substream, 350 struct snd_soc_dai *dai) 351 { 352 struct sst_runtime_stream *stream; 353 int str_id; 354 355 stream = substream->runtime->private_data; 356 power_down_sst(stream); 357 358 str_id = stream->stream_info.str_id; 359 if (str_id) 360 stream->ops->close(sst->dev, str_id); 361 module_put(sst->dev->driver->owner); 362 kfree(stream); 363 } 364 365 static int sst_media_prepare(struct snd_pcm_substream *substream, 366 struct snd_soc_dai *dai) 367 { 368 struct sst_runtime_stream *stream; 369 int ret_val = 0, str_id; 370 371 stream = substream->runtime->private_data; 372 str_id = stream->stream_info.str_id; 373 if (stream->stream_info.str_id) { 374 ret_val = stream->ops->stream_drop(sst->dev, str_id); 375 return ret_val; 376 } 377 378 ret_val = sst_platform_alloc_stream(substream, dai); 379 if (ret_val <= 0) 380 return ret_val; 381 snprintf(substream->pcm->id, sizeof(substream->pcm->id), 382 "%d", stream->stream_info.str_id); 383 384 ret_val = sst_platform_init_stream(substream); 385 if (ret_val) 386 return ret_val; 387 substream->runtime->hw.info = SNDRV_PCM_INFO_BLOCK_TRANSFER; 388 return ret_val; 389 } 390 391 static int sst_enable_ssp(struct snd_pcm_substream *substream, 392 struct snd_soc_dai *dai) 393 { 394 int ret = 0; 395 396 if (!snd_soc_dai_active(dai)) { 397 ret = sst_handle_vb_timer(dai, true); 398 sst_fill_ssp_defaults(dai); 399 } 400 return ret; 401 } 402 403 static int sst_be_hw_params(struct snd_pcm_substream *substream, 404 struct snd_pcm_hw_params *params, 405 struct snd_soc_dai *dai) 406 { 407 int ret = 0; 408 409 if (snd_soc_dai_active(dai) == 1) 410 ret = send_ssp_cmd(dai, dai->name, 1); 411 return ret; 412 } 413 414 static int sst_set_format(struct snd_soc_dai *dai, unsigned int fmt) 415 { 416 int ret = 0; 417 418 if (!snd_soc_dai_active(dai)) 419 return 0; 420 421 ret = sst_fill_ssp_config(dai, fmt); 422 if (ret < 0) 423 dev_err(dai->dev, "sst_set_format failed..\n"); 424 425 return ret; 426 } 427 428 static int sst_platform_set_ssp_slot(struct snd_soc_dai *dai, 429 unsigned int tx_mask, unsigned int rx_mask, 430 int slots, int slot_width) { 431 int ret = 0; 432 433 if (!snd_soc_dai_active(dai)) 434 return ret; 435 436 ret = sst_fill_ssp_slot(dai, tx_mask, rx_mask, slots, slot_width); 437 if (ret < 0) 438 dev_err(dai->dev, "sst_fill_ssp_slot failed..%d\n", ret); 439 440 return ret; 441 } 442 443 static void sst_disable_ssp(struct snd_pcm_substream *substream, 444 struct snd_soc_dai *dai) 445 { 446 if (!snd_soc_dai_active(dai)) { 447 send_ssp_cmd(dai, dai->name, 0); 448 sst_handle_vb_timer(dai, false); 449 } 450 } 451 452 static const struct snd_soc_dai_ops sst_media_dai_ops = { 453 .startup = sst_media_open, 454 .shutdown = sst_media_close, 455 .prepare = sst_media_prepare, 456 .mute_stream = sst_media_digital_mute, 457 }; 458 459 static const struct snd_soc_dai_ops sst_compr_dai_ops = { 460 .mute_stream = sst_media_digital_mute, 461 }; 462 463 static const struct snd_soc_dai_ops sst_be_dai_ops = { 464 .startup = sst_enable_ssp, 465 .hw_params = sst_be_hw_params, 466 .set_fmt = sst_set_format, 467 .set_tdm_slot = sst_platform_set_ssp_slot, 468 .shutdown = sst_disable_ssp, 469 }; 470 471 static struct snd_soc_dai_driver sst_platform_dai[] = { 472 { 473 .name = "media-cpu-dai", 474 .ops = &sst_media_dai_ops, 475 .playback = { 476 .stream_name = "Headset Playback", 477 .channels_min = SST_STEREO, 478 .channels_max = SST_STEREO, 479 .rates = SNDRV_PCM_RATE_44100|SNDRV_PCM_RATE_48000, 480 .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE, 481 }, 482 .capture = { 483 .stream_name = "Headset Capture", 484 .channels_min = 1, 485 .channels_max = 2, 486 .rates = SNDRV_PCM_RATE_44100|SNDRV_PCM_RATE_48000, 487 .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE, 488 }, 489 }, 490 { 491 .name = "deepbuffer-cpu-dai", 492 .ops = &sst_media_dai_ops, 493 .playback = { 494 .stream_name = "Deepbuffer Playback", 495 .channels_min = SST_STEREO, 496 .channels_max = SST_STEREO, 497 .rates = SNDRV_PCM_RATE_44100|SNDRV_PCM_RATE_48000, 498 .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE, 499 }, 500 }, 501 { 502 .name = "compress-cpu-dai", 503 .compress_new = snd_soc_new_compress, 504 .ops = &sst_compr_dai_ops, 505 .playback = { 506 .stream_name = "Compress Playback", 507 .channels_min = 1, 508 }, 509 }, 510 /* BE CPU Dais */ 511 { 512 .name = "ssp0-port", 513 .ops = &sst_be_dai_ops, 514 .playback = { 515 .stream_name = "ssp0 Tx", 516 .channels_min = SST_STEREO, 517 .channels_max = SST_STEREO, 518 .rates = SNDRV_PCM_RATE_48000, 519 .formats = SNDRV_PCM_FMTBIT_S16_LE, 520 }, 521 .capture = { 522 .stream_name = "ssp0 Rx", 523 .channels_min = SST_STEREO, 524 .channels_max = SST_STEREO, 525 .rates = SNDRV_PCM_RATE_48000, 526 .formats = SNDRV_PCM_FMTBIT_S16_LE, 527 }, 528 }, 529 { 530 .name = "ssp1-port", 531 .ops = &sst_be_dai_ops, 532 .playback = { 533 .stream_name = "ssp1 Tx", 534 .channels_min = SST_STEREO, 535 .channels_max = SST_STEREO, 536 .rates = SNDRV_PCM_RATE_8000|SNDRV_PCM_RATE_16000|SNDRV_PCM_RATE_48000, 537 .formats = SNDRV_PCM_FMTBIT_S16_LE, 538 }, 539 .capture = { 540 .stream_name = "ssp1 Rx", 541 .channels_min = SST_STEREO, 542 .channels_max = SST_STEREO, 543 .rates = SNDRV_PCM_RATE_8000|SNDRV_PCM_RATE_16000|SNDRV_PCM_RATE_48000, 544 .formats = SNDRV_PCM_FMTBIT_S16_LE, 545 }, 546 }, 547 { 548 .name = "ssp2-port", 549 .ops = &sst_be_dai_ops, 550 .playback = { 551 .stream_name = "ssp2 Tx", 552 .channels_min = SST_STEREO, 553 .channels_max = SST_STEREO, 554 .rates = SNDRV_PCM_RATE_48000, 555 .formats = SNDRV_PCM_FMTBIT_S16_LE, 556 }, 557 .capture = { 558 .stream_name = "ssp2 Rx", 559 .channels_min = SST_STEREO, 560 .channels_max = SST_STEREO, 561 .rates = SNDRV_PCM_RATE_48000, 562 .formats = SNDRV_PCM_FMTBIT_S16_LE, 563 }, 564 }, 565 }; 566 567 static int sst_soc_open(struct snd_soc_component *component, 568 struct snd_pcm_substream *substream) 569 { 570 struct snd_pcm_runtime *runtime; 571 572 if (substream->pcm->internal) 573 return 0; 574 575 runtime = substream->runtime; 576 runtime->hw = sst_platform_pcm_hw; 577 return 0; 578 } 579 580 static int sst_soc_trigger(struct snd_soc_component *component, 581 struct snd_pcm_substream *substream, int cmd) 582 { 583 int ret_val = 0, str_id; 584 struct sst_runtime_stream *stream; 585 int status; 586 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 587 588 dev_dbg(rtd->dev, "%s called\n", __func__); 589 if (substream->pcm->internal) 590 return 0; 591 stream = substream->runtime->private_data; 592 str_id = stream->stream_info.str_id; 593 switch (cmd) { 594 case SNDRV_PCM_TRIGGER_START: 595 dev_dbg(rtd->dev, "sst: Trigger Start\n"); 596 status = SST_PLATFORM_RUNNING; 597 stream->stream_info.arg = substream; 598 ret_val = stream->ops->stream_start(sst->dev, str_id); 599 break; 600 case SNDRV_PCM_TRIGGER_STOP: 601 dev_dbg(rtd->dev, "sst: in stop\n"); 602 status = SST_PLATFORM_DROPPED; 603 ret_val = stream->ops->stream_drop(sst->dev, str_id); 604 break; 605 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 606 case SNDRV_PCM_TRIGGER_SUSPEND: 607 dev_dbg(rtd->dev, "sst: in pause\n"); 608 status = SST_PLATFORM_PAUSED; 609 ret_val = stream->ops->stream_pause(sst->dev, str_id); 610 break; 611 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 612 case SNDRV_PCM_TRIGGER_RESUME: 613 dev_dbg(rtd->dev, "sst: in pause release\n"); 614 status = SST_PLATFORM_RUNNING; 615 ret_val = stream->ops->stream_pause_release(sst->dev, str_id); 616 break; 617 default: 618 return -EINVAL; 619 } 620 621 if (!ret_val) 622 sst_set_stream_status(stream, status); 623 624 return ret_val; 625 } 626 627 628 static snd_pcm_uframes_t sst_soc_pointer(struct snd_soc_component *component, 629 struct snd_pcm_substream *substream) 630 { 631 struct sst_runtime_stream *stream; 632 int ret_val, status; 633 struct pcm_stream_info *str_info; 634 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 635 636 stream = substream->runtime->private_data; 637 status = sst_get_stream_status(stream); 638 if (status == SST_PLATFORM_INIT) 639 return 0; 640 str_info = &stream->stream_info; 641 ret_val = stream->ops->stream_read_tstamp(sst->dev, str_info); 642 if (ret_val) { 643 dev_err(rtd->dev, "sst: error code = %d\n", ret_val); 644 return ret_val; 645 } 646 substream->runtime->delay = str_info->pcm_delay; 647 return str_info->buffer_ptr; 648 } 649 650 static int sst_soc_pcm_new(struct snd_soc_component *component, 651 struct snd_soc_pcm_runtime *rtd) 652 { 653 struct snd_soc_dai *dai = asoc_rtd_to_cpu(rtd, 0); 654 struct snd_pcm *pcm = rtd->pcm; 655 656 if (dai->driver->playback.channels_min || 657 dai->driver->capture.channels_min) { 658 snd_pcm_set_managed_buffer_all(pcm, 659 SNDRV_DMA_TYPE_CONTINUOUS, 660 snd_dma_continuous_data(GFP_DMA), 661 SST_MIN_BUFFER, SST_MAX_BUFFER); 662 } 663 return 0; 664 } 665 666 static int sst_soc_probe(struct snd_soc_component *component) 667 { 668 struct sst_data *drv = dev_get_drvdata(component->dev); 669 670 drv->soc_card = component->card; 671 return sst_dsp_init_v2_dpcm(component); 672 } 673 674 static void sst_soc_remove(struct snd_soc_component *component) 675 { 676 struct sst_data *drv = dev_get_drvdata(component->dev); 677 678 drv->soc_card = NULL; 679 } 680 681 static const struct snd_soc_component_driver sst_soc_platform_drv = { 682 .name = DRV_NAME, 683 .probe = sst_soc_probe, 684 .remove = sst_soc_remove, 685 .open = sst_soc_open, 686 .trigger = sst_soc_trigger, 687 .pointer = sst_soc_pointer, 688 .compress_ops = &sst_platform_compress_ops, 689 .pcm_construct = sst_soc_pcm_new, 690 }; 691 692 static int sst_platform_probe(struct platform_device *pdev) 693 { 694 struct sst_data *drv; 695 int ret; 696 struct sst_platform_data *pdata; 697 698 drv = devm_kzalloc(&pdev->dev, sizeof(*drv), GFP_KERNEL); 699 if (drv == NULL) { 700 return -ENOMEM; 701 } 702 703 pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL); 704 if (pdata == NULL) { 705 return -ENOMEM; 706 } 707 708 pdata->pdev_strm_map = dpcm_strm_map; 709 pdata->strm_map_size = ARRAY_SIZE(dpcm_strm_map); 710 drv->pdata = pdata; 711 drv->pdev = pdev; 712 mutex_init(&drv->lock); 713 dev_set_drvdata(&pdev->dev, drv); 714 715 ret = devm_snd_soc_register_component(&pdev->dev, &sst_soc_platform_drv, 716 sst_platform_dai, ARRAY_SIZE(sst_platform_dai)); 717 if (ret) 718 dev_err(&pdev->dev, "registering cpu dais failed\n"); 719 720 return ret; 721 } 722 723 static int sst_platform_remove(struct platform_device *pdev) 724 { 725 dev_dbg(&pdev->dev, "sst_platform_remove success\n"); 726 return 0; 727 } 728 729 #ifdef CONFIG_PM_SLEEP 730 731 static int sst_soc_prepare(struct device *dev) 732 { 733 struct sst_data *drv = dev_get_drvdata(dev); 734 struct snd_soc_pcm_runtime *rtd; 735 736 if (!drv->soc_card) 737 return 0; 738 739 /* suspend all pcms first */ 740 snd_soc_suspend(drv->soc_card->dev); 741 snd_soc_poweroff(drv->soc_card->dev); 742 743 /* set the SSPs to idle */ 744 for_each_card_rtds(drv->soc_card, rtd) { 745 struct snd_soc_dai *dai = asoc_rtd_to_cpu(rtd, 0); 746 747 if (snd_soc_dai_active(dai)) { 748 send_ssp_cmd(dai, dai->name, 0); 749 sst_handle_vb_timer(dai, false); 750 } 751 } 752 753 return 0; 754 } 755 756 static void sst_soc_complete(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; 763 764 /* restart SSPs */ 765 for_each_card_rtds(drv->soc_card, rtd) { 766 struct snd_soc_dai *dai = asoc_rtd_to_cpu(rtd, 0); 767 768 if (snd_soc_dai_active(dai)) { 769 sst_handle_vb_timer(dai, true); 770 send_ssp_cmd(dai, dai->name, 1); 771 } 772 } 773 snd_soc_resume(drv->soc_card->dev); 774 } 775 776 #else 777 778 #define sst_soc_prepare NULL 779 #define sst_soc_complete NULL 780 781 #endif 782 783 784 static const struct dev_pm_ops sst_platform_pm = { 785 .prepare = sst_soc_prepare, 786 .complete = sst_soc_complete, 787 }; 788 789 static struct platform_driver sst_platform_driver = { 790 .driver = { 791 .name = "sst-mfld-platform", 792 .pm = &sst_platform_pm, 793 }, 794 .probe = sst_platform_probe, 795 .remove = sst_platform_remove, 796 }; 797 798 module_platform_driver(sst_platform_driver); 799 800 MODULE_DESCRIPTION("ASoC Intel(R) MID Platform driver"); 801 MODULE_AUTHOR("Vinod Koul <vinod.koul@intel.com>"); 802 MODULE_AUTHOR("Harsha Priya <priya.harsha@intel.com>"); 803 MODULE_LICENSE("GPL v2"); 804 MODULE_ALIAS("platform:sst-atom-hifi2-platform"); 805 MODULE_ALIAS("platform:sst-mfld-platform"); 806