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 }; 102 103 static int sst_media_digital_mute(struct snd_soc_dai *dai, int mute, int stream) 104 { 105 106 return sst_send_pipe_gains(dai, stream, mute); 107 } 108 109 /* helper functions */ 110 void sst_set_stream_status(struct sst_runtime_stream *stream, 111 int state) 112 { 113 unsigned long flags; 114 spin_lock_irqsave(&stream->status_lock, flags); 115 stream->stream_status = state; 116 spin_unlock_irqrestore(&stream->status_lock, flags); 117 } 118 119 static inline int sst_get_stream_status(struct sst_runtime_stream *stream) 120 { 121 int state; 122 unsigned long flags; 123 124 spin_lock_irqsave(&stream->status_lock, flags); 125 state = stream->stream_status; 126 spin_unlock_irqrestore(&stream->status_lock, flags); 127 return state; 128 } 129 130 static void sst_fill_alloc_params(struct snd_pcm_substream *substream, 131 struct snd_sst_alloc_params_ext *alloc_param) 132 { 133 unsigned int channels; 134 snd_pcm_uframes_t period_size; 135 ssize_t periodbytes; 136 ssize_t buffer_bytes = snd_pcm_lib_buffer_bytes(substream); 137 u32 buffer_addr = virt_to_phys(substream->dma_buffer.area); 138 139 channels = substream->runtime->channels; 140 period_size = substream->runtime->period_size; 141 periodbytes = samples_to_bytes(substream->runtime, period_size); 142 alloc_param->ring_buf_info[0].addr = buffer_addr; 143 alloc_param->ring_buf_info[0].size = buffer_bytes; 144 alloc_param->sg_count = 1; 145 alloc_param->reserved = 0; 146 alloc_param->frag_size = periodbytes * channels; 147 148 } 149 static void sst_fill_pcm_params(struct snd_pcm_substream *substream, 150 struct snd_sst_stream_params *param) 151 { 152 param->uc.pcm_params.num_chan = (u8) substream->runtime->channels; 153 param->uc.pcm_params.pcm_wd_sz = substream->runtime->sample_bits; 154 param->uc.pcm_params.sfreq = substream->runtime->rate; 155 156 /* PCM stream via ALSA interface */ 157 param->uc.pcm_params.use_offload_path = 0; 158 param->uc.pcm_params.reserved2 = 0; 159 memset(param->uc.pcm_params.channel_map, 0, sizeof(u8)); 160 161 } 162 163 static int sst_get_stream_mapping(int dev, int sdev, int dir, 164 struct sst_dev_stream_map *map, int size) 165 { 166 int i; 167 168 if (map == NULL) 169 return -EINVAL; 170 171 172 /* index 0 is not used in stream map */ 173 for (i = 1; i < size; i++) { 174 if ((map[i].dev_num == dev) && (map[i].direction == dir)) 175 return i; 176 } 177 return 0; 178 } 179 180 int sst_fill_stream_params(void *substream, 181 const struct sst_data *ctx, struct snd_sst_params *str_params, bool is_compress) 182 { 183 int map_size; 184 int index; 185 struct sst_dev_stream_map *map; 186 struct snd_pcm_substream *pstream = NULL; 187 struct snd_compr_stream *cstream = NULL; 188 189 map = ctx->pdata->pdev_strm_map; 190 map_size = ctx->pdata->strm_map_size; 191 192 if (is_compress == true) 193 cstream = (struct snd_compr_stream *)substream; 194 else 195 pstream = (struct snd_pcm_substream *)substream; 196 197 str_params->stream_type = SST_STREAM_TYPE_MUSIC; 198 199 /* For pcm streams */ 200 if (pstream) { 201 index = sst_get_stream_mapping(pstream->pcm->device, 202 pstream->number, pstream->stream, 203 map, map_size); 204 if (index <= 0) 205 return -EINVAL; 206 207 str_params->stream_id = index; 208 str_params->device_type = map[index].device_id; 209 str_params->task = map[index].task_id; 210 211 str_params->ops = (u8)pstream->stream; 212 } 213 214 if (cstream) { 215 index = sst_get_stream_mapping(cstream->device->device, 216 0, cstream->direction, 217 map, map_size); 218 if (index <= 0) 219 return -EINVAL; 220 str_params->stream_id = index; 221 str_params->device_type = map[index].device_id; 222 str_params->task = map[index].task_id; 223 224 str_params->ops = (u8)cstream->direction; 225 } 226 return 0; 227 } 228 229 static int sst_platform_alloc_stream(struct snd_pcm_substream *substream, 230 struct snd_soc_dai *dai) 231 { 232 struct sst_runtime_stream *stream = 233 substream->runtime->private_data; 234 struct snd_sst_stream_params param = {{{0,},},}; 235 struct snd_sst_params str_params = {0}; 236 struct snd_sst_alloc_params_ext alloc_params = {0}; 237 int ret_val = 0; 238 struct sst_data *ctx = snd_soc_dai_get_drvdata(dai); 239 240 /* set codec params and inform SST driver the same */ 241 sst_fill_pcm_params(substream, ¶m); 242 sst_fill_alloc_params(substream, &alloc_params); 243 substream->runtime->dma_area = substream->dma_buffer.area; 244 str_params.sparams = param; 245 str_params.aparams = alloc_params; 246 str_params.codec = SST_CODEC_TYPE_PCM; 247 248 /* fill the device type and stream id to pass to SST driver */ 249 ret_val = sst_fill_stream_params(substream, ctx, &str_params, false); 250 if (ret_val < 0) 251 return ret_val; 252 253 stream->stream_info.str_id = str_params.stream_id; 254 255 ret_val = stream->ops->open(sst->dev, &str_params); 256 if (ret_val <= 0) 257 return ret_val; 258 259 260 return ret_val; 261 } 262 263 static void sst_period_elapsed(void *arg) 264 { 265 struct snd_pcm_substream *substream = arg; 266 struct sst_runtime_stream *stream; 267 int status; 268 269 if (!substream || !substream->runtime) 270 return; 271 stream = substream->runtime->private_data; 272 if (!stream) 273 return; 274 status = sst_get_stream_status(stream); 275 if (status != SST_PLATFORM_RUNNING) 276 return; 277 snd_pcm_period_elapsed(substream); 278 } 279 280 static int sst_platform_init_stream(struct snd_pcm_substream *substream) 281 { 282 struct sst_runtime_stream *stream = 283 substream->runtime->private_data; 284 struct snd_soc_pcm_runtime *rtd = substream->private_data; 285 int ret_val; 286 287 dev_dbg(rtd->dev, "setting buffer ptr param\n"); 288 sst_set_stream_status(stream, SST_PLATFORM_INIT); 289 stream->stream_info.period_elapsed = sst_period_elapsed; 290 stream->stream_info.arg = substream; 291 stream->stream_info.buffer_ptr = 0; 292 stream->stream_info.sfreq = substream->runtime->rate; 293 ret_val = stream->ops->stream_init(sst->dev, &stream->stream_info); 294 if (ret_val) 295 dev_err(rtd->dev, "control_set ret error %d\n", ret_val); 296 return ret_val; 297 298 } 299 300 static int power_up_sst(struct sst_runtime_stream *stream) 301 { 302 return stream->ops->power(sst->dev, true); 303 } 304 305 static void power_down_sst(struct sst_runtime_stream *stream) 306 { 307 stream->ops->power(sst->dev, false); 308 } 309 310 static int sst_media_open(struct snd_pcm_substream *substream, 311 struct snd_soc_dai *dai) 312 { 313 int ret_val = 0; 314 struct snd_pcm_runtime *runtime = substream->runtime; 315 struct sst_runtime_stream *stream; 316 317 stream = kzalloc(sizeof(*stream), GFP_KERNEL); 318 if (!stream) 319 return -ENOMEM; 320 spin_lock_init(&stream->status_lock); 321 322 /* get the sst ops */ 323 mutex_lock(&sst_lock); 324 if (!sst || 325 !try_module_get(sst->dev->driver->owner)) { 326 dev_err(dai->dev, "no device available to run\n"); 327 ret_val = -ENODEV; 328 goto out_ops; 329 } 330 stream->ops = sst->ops; 331 mutex_unlock(&sst_lock); 332 333 stream->stream_info.str_id = 0; 334 335 stream->stream_info.arg = substream; 336 /* allocate memory for SST API set */ 337 runtime->private_data = stream; 338 339 ret_val = power_up_sst(stream); 340 if (ret_val < 0) 341 return ret_val; 342 343 /* Make sure, that the period size is always even */ 344 snd_pcm_hw_constraint_step(substream->runtime, 0, 345 SNDRV_PCM_HW_PARAM_PERIODS, 2); 346 347 return snd_pcm_hw_constraint_integer(runtime, 348 SNDRV_PCM_HW_PARAM_PERIODS); 349 out_ops: 350 kfree(stream); 351 mutex_unlock(&sst_lock); 352 return ret_val; 353 } 354 355 static void sst_media_close(struct snd_pcm_substream *substream, 356 struct snd_soc_dai *dai) 357 { 358 struct sst_runtime_stream *stream; 359 int ret_val = 0, str_id; 360 361 stream = substream->runtime->private_data; 362 power_down_sst(stream); 363 364 str_id = stream->stream_info.str_id; 365 if (str_id) 366 ret_val = stream->ops->close(sst->dev, str_id); 367 module_put(sst->dev->driver->owner); 368 kfree(stream); 369 } 370 371 static inline unsigned int get_current_pipe_id(struct snd_soc_dai *dai, 372 struct snd_pcm_substream *substream) 373 { 374 struct sst_data *sst = snd_soc_dai_get_drvdata(dai); 375 struct sst_dev_stream_map *map = sst->pdata->pdev_strm_map; 376 struct sst_runtime_stream *stream = 377 substream->runtime->private_data; 378 u32 str_id = stream->stream_info.str_id; 379 unsigned int pipe_id; 380 381 pipe_id = map[str_id].device_id; 382 383 dev_dbg(dai->dev, "got pipe_id = %#x for str_id = %d\n", 384 pipe_id, str_id); 385 return pipe_id; 386 } 387 388 static int sst_media_prepare(struct snd_pcm_substream *substream, 389 struct snd_soc_dai *dai) 390 { 391 struct sst_runtime_stream *stream; 392 int ret_val = 0, str_id; 393 394 stream = substream->runtime->private_data; 395 str_id = stream->stream_info.str_id; 396 if (stream->stream_info.str_id) { 397 ret_val = stream->ops->stream_drop(sst->dev, str_id); 398 return ret_val; 399 } 400 401 ret_val = sst_platform_alloc_stream(substream, dai); 402 if (ret_val <= 0) 403 return ret_val; 404 snprintf(substream->pcm->id, sizeof(substream->pcm->id), 405 "%d", stream->stream_info.str_id); 406 407 ret_val = sst_platform_init_stream(substream); 408 if (ret_val) 409 return ret_val; 410 substream->runtime->hw.info = SNDRV_PCM_INFO_BLOCK_TRANSFER; 411 return ret_val; 412 } 413 414 static int sst_media_hw_params(struct snd_pcm_substream *substream, 415 struct snd_pcm_hw_params *params, 416 struct snd_soc_dai *dai) 417 { 418 snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(params)); 419 memset(substream->runtime->dma_area, 0, params_buffer_bytes(params)); 420 return 0; 421 } 422 423 static int sst_media_hw_free(struct snd_pcm_substream *substream, 424 struct snd_soc_dai *dai) 425 { 426 return snd_pcm_lib_free_pages(substream); 427 } 428 429 static int sst_enable_ssp(struct snd_pcm_substream *substream, 430 struct snd_soc_dai *dai) 431 { 432 int ret = 0; 433 434 if (!dai->active) { 435 ret = sst_handle_vb_timer(dai, true); 436 sst_fill_ssp_defaults(dai); 437 } 438 return ret; 439 } 440 441 static int sst_be_hw_params(struct snd_pcm_substream *substream, 442 struct snd_pcm_hw_params *params, 443 struct snd_soc_dai *dai) 444 { 445 int ret = 0; 446 447 if (dai->active == 1) 448 ret = send_ssp_cmd(dai, dai->name, 1); 449 return ret; 450 } 451 452 static int sst_set_format(struct snd_soc_dai *dai, unsigned int fmt) 453 { 454 int ret = 0; 455 456 if (!dai->active) 457 return 0; 458 459 ret = sst_fill_ssp_config(dai, fmt); 460 if (ret < 0) 461 dev_err(dai->dev, "sst_set_format failed..\n"); 462 463 return ret; 464 } 465 466 static int sst_platform_set_ssp_slot(struct snd_soc_dai *dai, 467 unsigned int tx_mask, unsigned int rx_mask, 468 int slots, int slot_width) { 469 int ret = 0; 470 471 if (!dai->active) 472 return ret; 473 474 ret = sst_fill_ssp_slot(dai, tx_mask, rx_mask, slots, slot_width); 475 if (ret < 0) 476 dev_err(dai->dev, "sst_fill_ssp_slot failed..%d\n", ret); 477 478 return ret; 479 } 480 481 static void sst_disable_ssp(struct snd_pcm_substream *substream, 482 struct snd_soc_dai *dai) 483 { 484 if (!dai->active) { 485 send_ssp_cmd(dai, dai->name, 0); 486 sst_handle_vb_timer(dai, false); 487 } 488 } 489 490 static struct snd_soc_dai_ops sst_media_dai_ops = { 491 .startup = sst_media_open, 492 .shutdown = sst_media_close, 493 .prepare = sst_media_prepare, 494 .hw_params = sst_media_hw_params, 495 .hw_free = sst_media_hw_free, 496 .mute_stream = sst_media_digital_mute, 497 }; 498 499 static struct snd_soc_dai_ops sst_compr_dai_ops = { 500 .mute_stream = sst_media_digital_mute, 501 }; 502 503 static struct snd_soc_dai_ops sst_be_dai_ops = { 504 .startup = sst_enable_ssp, 505 .hw_params = sst_be_hw_params, 506 .set_fmt = sst_set_format, 507 .set_tdm_slot = sst_platform_set_ssp_slot, 508 .shutdown = sst_disable_ssp, 509 }; 510 511 static struct snd_soc_dai_driver sst_platform_dai[] = { 512 { 513 .name = "media-cpu-dai", 514 .ops = &sst_media_dai_ops, 515 .playback = { 516 .stream_name = "Headset 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, 521 }, 522 .capture = { 523 .stream_name = "Headset Capture", 524 .channels_min = 1, 525 .channels_max = 2, 526 .rates = SNDRV_PCM_RATE_44100|SNDRV_PCM_RATE_48000, 527 .formats = SNDRV_PCM_FMTBIT_S16_LE, 528 }, 529 }, 530 { 531 .name = "compress-cpu-dai", 532 .compress_dai = 1, 533 .ops = &sst_compr_dai_ops, 534 .playback = { 535 .stream_name = "Compress Playback", 536 .channels_min = SST_STEREO, 537 .channels_max = SST_STEREO, 538 .rates = SNDRV_PCM_RATE_48000, 539 .formats = SNDRV_PCM_FMTBIT_S16_LE, 540 }, 541 }, 542 /* BE CPU Dais */ 543 { 544 .name = "ssp0-port", 545 .ops = &sst_be_dai_ops, 546 .playback = { 547 .stream_name = "ssp0 Tx", 548 .channels_min = SST_STEREO, 549 .channels_max = SST_STEREO, 550 .rates = SNDRV_PCM_RATE_48000, 551 .formats = SNDRV_PCM_FMTBIT_S16_LE, 552 }, 553 .capture = { 554 .stream_name = "ssp0 Rx", 555 .channels_min = SST_STEREO, 556 .channels_max = SST_STEREO, 557 .rates = SNDRV_PCM_RATE_48000, 558 .formats = SNDRV_PCM_FMTBIT_S16_LE, 559 }, 560 }, 561 { 562 .name = "ssp1-port", 563 .ops = &sst_be_dai_ops, 564 .playback = { 565 .stream_name = "ssp1 Tx", 566 .channels_min = SST_STEREO, 567 .channels_max = SST_STEREO, 568 .rates = SNDRV_PCM_RATE_8000|SNDRV_PCM_RATE_16000|SNDRV_PCM_RATE_48000, 569 .formats = SNDRV_PCM_FMTBIT_S16_LE, 570 }, 571 .capture = { 572 .stream_name = "ssp1 Rx", 573 .channels_min = SST_STEREO, 574 .channels_max = SST_STEREO, 575 .rates = SNDRV_PCM_RATE_8000|SNDRV_PCM_RATE_16000|SNDRV_PCM_RATE_48000, 576 .formats = SNDRV_PCM_FMTBIT_S16_LE, 577 }, 578 }, 579 { 580 .name = "ssp2-port", 581 .ops = &sst_be_dai_ops, 582 .playback = { 583 .stream_name = "ssp2 Tx", 584 .channels_min = SST_STEREO, 585 .channels_max = SST_STEREO, 586 .rates = SNDRV_PCM_RATE_48000, 587 .formats = SNDRV_PCM_FMTBIT_S16_LE, 588 }, 589 .capture = { 590 .stream_name = "ssp2 Rx", 591 .channels_min = SST_STEREO, 592 .channels_max = SST_STEREO, 593 .rates = SNDRV_PCM_RATE_48000, 594 .formats = SNDRV_PCM_FMTBIT_S16_LE, 595 }, 596 }, 597 }; 598 599 static int sst_platform_open(struct snd_pcm_substream *substream) 600 { 601 struct snd_pcm_runtime *runtime; 602 603 if (substream->pcm->internal) 604 return 0; 605 606 runtime = substream->runtime; 607 runtime->hw = sst_platform_pcm_hw; 608 return 0; 609 } 610 611 static int sst_platform_pcm_trigger(struct snd_pcm_substream *substream, 612 int cmd) 613 { 614 int ret_val = 0, str_id; 615 struct sst_runtime_stream *stream; 616 int status; 617 struct snd_soc_pcm_runtime *rtd = substream->private_data; 618 619 dev_dbg(rtd->dev, "sst_platform_pcm_trigger called\n"); 620 if (substream->pcm->internal) 621 return 0; 622 stream = substream->runtime->private_data; 623 str_id = stream->stream_info.str_id; 624 switch (cmd) { 625 case SNDRV_PCM_TRIGGER_START: 626 dev_dbg(rtd->dev, "sst: Trigger Start\n"); 627 status = SST_PLATFORM_RUNNING; 628 stream->stream_info.arg = substream; 629 ret_val = stream->ops->stream_start(sst->dev, str_id); 630 break; 631 case SNDRV_PCM_TRIGGER_STOP: 632 dev_dbg(rtd->dev, "sst: in stop\n"); 633 status = SST_PLATFORM_DROPPED; 634 ret_val = stream->ops->stream_drop(sst->dev, str_id); 635 break; 636 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 637 case SNDRV_PCM_TRIGGER_SUSPEND: 638 dev_dbg(rtd->dev, "sst: in pause\n"); 639 status = SST_PLATFORM_PAUSED; 640 ret_val = stream->ops->stream_pause(sst->dev, str_id); 641 break; 642 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 643 case SNDRV_PCM_TRIGGER_RESUME: 644 dev_dbg(rtd->dev, "sst: in pause release\n"); 645 status = SST_PLATFORM_RUNNING; 646 ret_val = stream->ops->stream_pause_release(sst->dev, str_id); 647 break; 648 default: 649 return -EINVAL; 650 } 651 652 if (!ret_val) 653 sst_set_stream_status(stream, status); 654 655 return ret_val; 656 } 657 658 659 static snd_pcm_uframes_t sst_platform_pcm_pointer 660 (struct snd_pcm_substream *substream) 661 { 662 struct sst_runtime_stream *stream; 663 int ret_val, status; 664 struct pcm_stream_info *str_info; 665 struct snd_soc_pcm_runtime *rtd = substream->private_data; 666 667 stream = substream->runtime->private_data; 668 status = sst_get_stream_status(stream); 669 if (status == SST_PLATFORM_INIT) 670 return 0; 671 str_info = &stream->stream_info; 672 ret_val = stream->ops->stream_read_tstamp(sst->dev, str_info); 673 if (ret_val) { 674 dev_err(rtd->dev, "sst: error code = %d\n", ret_val); 675 return ret_val; 676 } 677 substream->runtime->delay = str_info->pcm_delay; 678 return str_info->buffer_ptr; 679 } 680 681 static struct snd_pcm_ops sst_platform_ops = { 682 .open = sst_platform_open, 683 .ioctl = snd_pcm_lib_ioctl, 684 .trigger = sst_platform_pcm_trigger, 685 .pointer = sst_platform_pcm_pointer, 686 }; 687 688 static int sst_pcm_new(struct snd_soc_pcm_runtime *rtd) 689 { 690 struct snd_soc_dai *dai = rtd->cpu_dai; 691 struct snd_pcm *pcm = rtd->pcm; 692 int retval = 0; 693 694 if (dai->driver->playback.channels_min || 695 dai->driver->capture.channels_min) { 696 retval = snd_pcm_lib_preallocate_pages_for_all(pcm, 697 SNDRV_DMA_TYPE_CONTINUOUS, 698 snd_dma_continuous_data(GFP_DMA), 699 SST_MIN_BUFFER, SST_MAX_BUFFER); 700 if (retval) { 701 dev_err(rtd->dev, "dma buffer allocationf fail\n"); 702 return retval; 703 } 704 } 705 return retval; 706 } 707 708 static int sst_soc_probe(struct snd_soc_platform *platform) 709 { 710 struct sst_data *drv = dev_get_drvdata(platform->dev); 711 712 drv->soc_card = platform->component.card; 713 return sst_dsp_init_v2_dpcm(platform); 714 } 715 716 static struct snd_soc_platform_driver sst_soc_platform_drv = { 717 .probe = sst_soc_probe, 718 .ops = &sst_platform_ops, 719 .compr_ops = &sst_platform_compr_ops, 720 .pcm_new = sst_pcm_new, 721 }; 722 723 static const struct snd_soc_component_driver sst_component = { 724 .name = "sst", 725 }; 726 727 728 static int sst_platform_probe(struct platform_device *pdev) 729 { 730 struct sst_data *drv; 731 int ret; 732 struct sst_platform_data *pdata; 733 734 drv = devm_kzalloc(&pdev->dev, sizeof(*drv), GFP_KERNEL); 735 if (drv == NULL) { 736 return -ENOMEM; 737 } 738 739 pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL); 740 if (pdata == NULL) { 741 return -ENOMEM; 742 } 743 744 pdata->pdev_strm_map = dpcm_strm_map; 745 pdata->strm_map_size = ARRAY_SIZE(dpcm_strm_map); 746 drv->pdata = pdata; 747 drv->pdev = pdev; 748 mutex_init(&drv->lock); 749 dev_set_drvdata(&pdev->dev, drv); 750 751 ret = snd_soc_register_platform(&pdev->dev, &sst_soc_platform_drv); 752 if (ret) { 753 dev_err(&pdev->dev, "registering soc platform failed\n"); 754 return ret; 755 } 756 757 ret = snd_soc_register_component(&pdev->dev, &sst_component, 758 sst_platform_dai, ARRAY_SIZE(sst_platform_dai)); 759 if (ret) { 760 dev_err(&pdev->dev, "registering cpu dais failed\n"); 761 snd_soc_unregister_platform(&pdev->dev); 762 } 763 return ret; 764 } 765 766 static int sst_platform_remove(struct platform_device *pdev) 767 { 768 769 snd_soc_unregister_component(&pdev->dev); 770 snd_soc_unregister_platform(&pdev->dev); 771 dev_dbg(&pdev->dev, "sst_platform_remove success\n"); 772 return 0; 773 } 774 775 #ifdef CONFIG_PM_SLEEP 776 777 static int sst_soc_prepare(struct device *dev) 778 { 779 struct sst_data *drv = dev_get_drvdata(dev); 780 int i; 781 782 /* suspend all pcms first */ 783 snd_soc_suspend(drv->soc_card->dev); 784 snd_soc_poweroff(drv->soc_card->dev); 785 786 /* set the SSPs to idle */ 787 for (i = 0; i < drv->soc_card->num_rtd; i++) { 788 struct snd_soc_dai *dai = drv->soc_card->rtd[i].cpu_dai; 789 790 if (dai->active) { 791 send_ssp_cmd(dai, dai->name, 0); 792 sst_handle_vb_timer(dai, false); 793 } 794 } 795 796 return 0; 797 } 798 799 static void sst_soc_complete(struct device *dev) 800 { 801 struct sst_data *drv = dev_get_drvdata(dev); 802 int i; 803 804 /* restart SSPs */ 805 for (i = 0; i < drv->soc_card->num_rtd; i++) { 806 struct snd_soc_dai *dai = drv->soc_card->rtd[i].cpu_dai; 807 808 if (dai->active) { 809 sst_handle_vb_timer(dai, true); 810 send_ssp_cmd(dai, dai->name, 1); 811 } 812 } 813 snd_soc_resume(drv->soc_card->dev); 814 } 815 816 #else 817 818 #define sst_soc_prepare NULL 819 #define sst_soc_complete NULL 820 821 #endif 822 823 824 static const struct dev_pm_ops sst_platform_pm = { 825 .prepare = sst_soc_prepare, 826 .complete = sst_soc_complete, 827 }; 828 829 static struct platform_driver sst_platform_driver = { 830 .driver = { 831 .name = "sst-mfld-platform", 832 .pm = &sst_platform_pm, 833 }, 834 .probe = sst_platform_probe, 835 .remove = sst_platform_remove, 836 }; 837 838 module_platform_driver(sst_platform_driver); 839 840 MODULE_DESCRIPTION("ASoC Intel(R) MID Platform driver"); 841 MODULE_AUTHOR("Vinod Koul <vinod.koul@intel.com>"); 842 MODULE_AUTHOR("Harsha Priya <priya.harsha@intel.com>"); 843 MODULE_LICENSE("GPL v2"); 844 MODULE_ALIAS("platform:sst-mfld-platform"); 845