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 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 == true) 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 snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(params)); 403 memset(substream->runtime->dma_area, 0, params_buffer_bytes(params)); 404 return 0; 405 } 406 407 static int sst_media_hw_free(struct snd_pcm_substream *substream, 408 struct snd_soc_dai *dai) 409 { 410 return snd_pcm_lib_free_pages(substream); 411 } 412 413 static int sst_enable_ssp(struct snd_pcm_substream *substream, 414 struct snd_soc_dai *dai) 415 { 416 int ret = 0; 417 418 if (!dai->active) { 419 ret = sst_handle_vb_timer(dai, true); 420 sst_fill_ssp_defaults(dai); 421 } 422 return ret; 423 } 424 425 static int sst_be_hw_params(struct snd_pcm_substream *substream, 426 struct snd_pcm_hw_params *params, 427 struct snd_soc_dai *dai) 428 { 429 int ret = 0; 430 431 if (dai->active == 1) 432 ret = send_ssp_cmd(dai, dai->name, 1); 433 return ret; 434 } 435 436 static int sst_set_format(struct snd_soc_dai *dai, unsigned int fmt) 437 { 438 int ret = 0; 439 440 if (!dai->active) 441 return 0; 442 443 ret = sst_fill_ssp_config(dai, fmt); 444 if (ret < 0) 445 dev_err(dai->dev, "sst_set_format failed..\n"); 446 447 return ret; 448 } 449 450 static int sst_platform_set_ssp_slot(struct snd_soc_dai *dai, 451 unsigned int tx_mask, unsigned int rx_mask, 452 int slots, int slot_width) { 453 int ret = 0; 454 455 if (!dai->active) 456 return ret; 457 458 ret = sst_fill_ssp_slot(dai, tx_mask, rx_mask, slots, slot_width); 459 if (ret < 0) 460 dev_err(dai->dev, "sst_fill_ssp_slot failed..%d\n", ret); 461 462 return ret; 463 } 464 465 static void sst_disable_ssp(struct snd_pcm_substream *substream, 466 struct snd_soc_dai *dai) 467 { 468 if (!dai->active) { 469 send_ssp_cmd(dai, dai->name, 0); 470 sst_handle_vb_timer(dai, false); 471 } 472 } 473 474 static struct snd_soc_dai_ops sst_media_dai_ops = { 475 .startup = sst_media_open, 476 .shutdown = sst_media_close, 477 .prepare = sst_media_prepare, 478 .hw_params = sst_media_hw_params, 479 .hw_free = sst_media_hw_free, 480 .mute_stream = sst_media_digital_mute, 481 }; 482 483 static struct snd_soc_dai_ops sst_compr_dai_ops = { 484 .mute_stream = sst_media_digital_mute, 485 }; 486 487 static struct snd_soc_dai_ops sst_be_dai_ops = { 488 .startup = sst_enable_ssp, 489 .hw_params = sst_be_hw_params, 490 .set_fmt = sst_set_format, 491 .set_tdm_slot = sst_platform_set_ssp_slot, 492 .shutdown = sst_disable_ssp, 493 }; 494 495 static struct snd_soc_dai_driver sst_platform_dai[] = { 496 { 497 .name = "media-cpu-dai", 498 .ops = &sst_media_dai_ops, 499 .playback = { 500 .stream_name = "Headset Playback", 501 .channels_min = SST_STEREO, 502 .channels_max = SST_STEREO, 503 .rates = SNDRV_PCM_RATE_44100|SNDRV_PCM_RATE_48000, 504 .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE, 505 }, 506 .capture = { 507 .stream_name = "Headset Capture", 508 .channels_min = 1, 509 .channels_max = 2, 510 .rates = SNDRV_PCM_RATE_44100|SNDRV_PCM_RATE_48000, 511 .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE, 512 }, 513 }, 514 { 515 .name = "deepbuffer-cpu-dai", 516 .ops = &sst_media_dai_ops, 517 .playback = { 518 .stream_name = "Deepbuffer Playback", 519 .channels_min = SST_STEREO, 520 .channels_max = SST_STEREO, 521 .rates = SNDRV_PCM_RATE_44100|SNDRV_PCM_RATE_48000, 522 .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE, 523 }, 524 }, 525 { 526 .name = "compress-cpu-dai", 527 .compress_new = snd_soc_new_compress, 528 .ops = &sst_compr_dai_ops, 529 .playback = { 530 .stream_name = "Compress Playback", 531 .channels_min = 1, 532 }, 533 }, 534 /* BE CPU Dais */ 535 { 536 .name = "ssp0-port", 537 .ops = &sst_be_dai_ops, 538 .playback = { 539 .stream_name = "ssp0 Tx", 540 .channels_min = SST_STEREO, 541 .channels_max = SST_STEREO, 542 .rates = SNDRV_PCM_RATE_48000, 543 .formats = SNDRV_PCM_FMTBIT_S16_LE, 544 }, 545 .capture = { 546 .stream_name = "ssp0 Rx", 547 .channels_min = SST_STEREO, 548 .channels_max = SST_STEREO, 549 .rates = SNDRV_PCM_RATE_48000, 550 .formats = SNDRV_PCM_FMTBIT_S16_LE, 551 }, 552 }, 553 { 554 .name = "ssp1-port", 555 .ops = &sst_be_dai_ops, 556 .playback = { 557 .stream_name = "ssp1 Tx", 558 .channels_min = SST_STEREO, 559 .channels_max = SST_STEREO, 560 .rates = SNDRV_PCM_RATE_8000|SNDRV_PCM_RATE_16000|SNDRV_PCM_RATE_48000, 561 .formats = SNDRV_PCM_FMTBIT_S16_LE, 562 }, 563 .capture = { 564 .stream_name = "ssp1 Rx", 565 .channels_min = SST_STEREO, 566 .channels_max = SST_STEREO, 567 .rates = SNDRV_PCM_RATE_8000|SNDRV_PCM_RATE_16000|SNDRV_PCM_RATE_48000, 568 .formats = SNDRV_PCM_FMTBIT_S16_LE, 569 }, 570 }, 571 { 572 .name = "ssp2-port", 573 .ops = &sst_be_dai_ops, 574 .playback = { 575 .stream_name = "ssp2 Tx", 576 .channels_min = SST_STEREO, 577 .channels_max = SST_STEREO, 578 .rates = SNDRV_PCM_RATE_48000, 579 .formats = SNDRV_PCM_FMTBIT_S16_LE, 580 }, 581 .capture = { 582 .stream_name = "ssp2 Rx", 583 .channels_min = SST_STEREO, 584 .channels_max = SST_STEREO, 585 .rates = SNDRV_PCM_RATE_48000, 586 .formats = SNDRV_PCM_FMTBIT_S16_LE, 587 }, 588 }, 589 }; 590 591 static int sst_platform_open(struct snd_pcm_substream *substream) 592 { 593 struct snd_pcm_runtime *runtime; 594 595 if (substream->pcm->internal) 596 return 0; 597 598 runtime = substream->runtime; 599 runtime->hw = sst_platform_pcm_hw; 600 return 0; 601 } 602 603 static int sst_platform_pcm_trigger(struct snd_pcm_substream *substream, 604 int cmd) 605 { 606 int ret_val = 0, str_id; 607 struct sst_runtime_stream *stream; 608 int status; 609 struct snd_soc_pcm_runtime *rtd = substream->private_data; 610 611 dev_dbg(rtd->dev, "sst_platform_pcm_trigger called\n"); 612 if (substream->pcm->internal) 613 return 0; 614 stream = substream->runtime->private_data; 615 str_id = stream->stream_info.str_id; 616 switch (cmd) { 617 case SNDRV_PCM_TRIGGER_START: 618 dev_dbg(rtd->dev, "sst: Trigger Start\n"); 619 status = SST_PLATFORM_RUNNING; 620 stream->stream_info.arg = substream; 621 ret_val = stream->ops->stream_start(sst->dev, str_id); 622 break; 623 case SNDRV_PCM_TRIGGER_STOP: 624 dev_dbg(rtd->dev, "sst: in stop\n"); 625 status = SST_PLATFORM_DROPPED; 626 ret_val = stream->ops->stream_drop(sst->dev, str_id); 627 break; 628 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 629 case SNDRV_PCM_TRIGGER_SUSPEND: 630 dev_dbg(rtd->dev, "sst: in pause\n"); 631 status = SST_PLATFORM_PAUSED; 632 ret_val = stream->ops->stream_pause(sst->dev, str_id); 633 break; 634 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 635 case SNDRV_PCM_TRIGGER_RESUME: 636 dev_dbg(rtd->dev, "sst: in pause release\n"); 637 status = SST_PLATFORM_RUNNING; 638 ret_val = stream->ops->stream_pause_release(sst->dev, str_id); 639 break; 640 default: 641 return -EINVAL; 642 } 643 644 if (!ret_val) 645 sst_set_stream_status(stream, status); 646 647 return ret_val; 648 } 649 650 651 static snd_pcm_uframes_t sst_platform_pcm_pointer 652 (struct snd_pcm_substream *substream) 653 { 654 struct sst_runtime_stream *stream; 655 int ret_val, status; 656 struct pcm_stream_info *str_info; 657 struct snd_soc_pcm_runtime *rtd = substream->private_data; 658 659 stream = substream->runtime->private_data; 660 status = sst_get_stream_status(stream); 661 if (status == SST_PLATFORM_INIT) 662 return 0; 663 str_info = &stream->stream_info; 664 ret_val = stream->ops->stream_read_tstamp(sst->dev, str_info); 665 if (ret_val) { 666 dev_err(rtd->dev, "sst: error code = %d\n", ret_val); 667 return ret_val; 668 } 669 substream->runtime->delay = str_info->pcm_delay; 670 return str_info->buffer_ptr; 671 } 672 673 static const struct snd_pcm_ops sst_platform_ops = { 674 .open = sst_platform_open, 675 .ioctl = snd_pcm_lib_ioctl, 676 .trigger = sst_platform_pcm_trigger, 677 .pointer = sst_platform_pcm_pointer, 678 }; 679 680 static int sst_pcm_new(struct snd_soc_pcm_runtime *rtd) 681 { 682 struct snd_soc_dai *dai = rtd->cpu_dai; 683 struct snd_pcm *pcm = rtd->pcm; 684 int retval = 0; 685 686 if (dai->driver->playback.channels_min || 687 dai->driver->capture.channels_min) { 688 retval = snd_pcm_lib_preallocate_pages_for_all(pcm, 689 SNDRV_DMA_TYPE_CONTINUOUS, 690 snd_dma_continuous_data(GFP_DMA), 691 SST_MIN_BUFFER, SST_MAX_BUFFER); 692 if (retval) { 693 dev_err(rtd->dev, "dma buffer allocationf fail\n"); 694 return retval; 695 } 696 } 697 return retval; 698 } 699 700 static int sst_soc_probe(struct snd_soc_platform *platform) 701 { 702 struct sst_data *drv = dev_get_drvdata(platform->dev); 703 704 drv->soc_card = platform->component.card; 705 return sst_dsp_init_v2_dpcm(platform); 706 } 707 708 static struct snd_soc_platform_driver sst_soc_platform_drv = { 709 .probe = sst_soc_probe, 710 .ops = &sst_platform_ops, 711 .compr_ops = &sst_platform_compr_ops, 712 .pcm_new = sst_pcm_new, 713 }; 714 715 static const struct snd_soc_component_driver sst_component = { 716 .name = "sst", 717 }; 718 719 720 static int sst_platform_probe(struct platform_device *pdev) 721 { 722 struct sst_data *drv; 723 int ret; 724 struct sst_platform_data *pdata; 725 726 drv = devm_kzalloc(&pdev->dev, sizeof(*drv), GFP_KERNEL); 727 if (drv == NULL) { 728 return -ENOMEM; 729 } 730 731 pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL); 732 if (pdata == NULL) { 733 return -ENOMEM; 734 } 735 736 pdata->pdev_strm_map = dpcm_strm_map; 737 pdata->strm_map_size = ARRAY_SIZE(dpcm_strm_map); 738 drv->pdata = pdata; 739 drv->pdev = pdev; 740 mutex_init(&drv->lock); 741 dev_set_drvdata(&pdev->dev, drv); 742 743 ret = snd_soc_register_platform(&pdev->dev, &sst_soc_platform_drv); 744 if (ret) { 745 dev_err(&pdev->dev, "registering soc platform failed\n"); 746 return ret; 747 } 748 749 ret = snd_soc_register_component(&pdev->dev, &sst_component, 750 sst_platform_dai, ARRAY_SIZE(sst_platform_dai)); 751 if (ret) { 752 dev_err(&pdev->dev, "registering cpu dais failed\n"); 753 snd_soc_unregister_platform(&pdev->dev); 754 } 755 return ret; 756 } 757 758 static int sst_platform_remove(struct platform_device *pdev) 759 { 760 761 snd_soc_unregister_component(&pdev->dev); 762 snd_soc_unregister_platform(&pdev->dev); 763 dev_dbg(&pdev->dev, "sst_platform_remove success\n"); 764 return 0; 765 } 766 767 #ifdef CONFIG_PM_SLEEP 768 769 static int sst_soc_prepare(struct device *dev) 770 { 771 struct sst_data *drv = dev_get_drvdata(dev); 772 struct snd_soc_pcm_runtime *rtd; 773 774 if (!drv->soc_card) 775 return 0; 776 777 /* suspend all pcms first */ 778 snd_soc_suspend(drv->soc_card->dev); 779 snd_soc_poweroff(drv->soc_card->dev); 780 781 /* set the SSPs to idle */ 782 list_for_each_entry(rtd, &drv->soc_card->rtd_list, list) { 783 struct snd_soc_dai *dai = rtd->cpu_dai; 784 785 if (dai->active) { 786 send_ssp_cmd(dai, dai->name, 0); 787 sst_handle_vb_timer(dai, false); 788 } 789 } 790 791 return 0; 792 } 793 794 static void sst_soc_complete(struct device *dev) 795 { 796 struct sst_data *drv = dev_get_drvdata(dev); 797 struct snd_soc_pcm_runtime *rtd; 798 799 if (!drv->soc_card) 800 return; 801 802 /* restart SSPs */ 803 list_for_each_entry(rtd, &drv->soc_card->rtd_list, list) { 804 struct snd_soc_dai *dai = rtd->cpu_dai; 805 806 if (dai->active) { 807 sst_handle_vb_timer(dai, true); 808 send_ssp_cmd(dai, dai->name, 1); 809 } 810 } 811 snd_soc_resume(drv->soc_card->dev); 812 } 813 814 #else 815 816 #define sst_soc_prepare NULL 817 #define sst_soc_complete NULL 818 819 #endif 820 821 822 static const struct dev_pm_ops sst_platform_pm = { 823 .prepare = sst_soc_prepare, 824 .complete = sst_soc_complete, 825 }; 826 827 static struct platform_driver sst_platform_driver = { 828 .driver = { 829 .name = "sst-mfld-platform", 830 .pm = &sst_platform_pm, 831 }, 832 .probe = sst_platform_probe, 833 .remove = sst_platform_remove, 834 }; 835 836 module_platform_driver(sst_platform_driver); 837 838 MODULE_DESCRIPTION("ASoC Intel(R) MID Platform driver"); 839 MODULE_AUTHOR("Vinod Koul <vinod.koul@intel.com>"); 840 MODULE_AUTHOR("Harsha Priya <priya.harsha@intel.com>"); 841 MODULE_LICENSE("GPL v2"); 842 MODULE_ALIAS("platform:sst-atom-hifi2-platform"); 843 MODULE_ALIAS("platform:sst-mfld-platform"); 844