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 extern struct snd_compr_ops sst_platform_compr_ops; 37 38 int sst_register_dsp(struct sst_device *dev) 39 { 40 if (WARN_ON(!dev)) 41 return -EINVAL; 42 if (!try_module_get(dev->dev->driver->owner)) 43 return -ENODEV; 44 mutex_lock(&sst_lock); 45 if (sst) { 46 dev_err(dev->dev, "we already have a device %s\n", sst->name); 47 module_put(dev->dev->driver->owner); 48 mutex_unlock(&sst_lock); 49 return -EEXIST; 50 } 51 dev_dbg(dev->dev, "registering device %s\n", dev->name); 52 sst = dev; 53 mutex_unlock(&sst_lock); 54 return 0; 55 } 56 EXPORT_SYMBOL_GPL(sst_register_dsp); 57 58 int sst_unregister_dsp(struct sst_device *dev) 59 { 60 if (WARN_ON(!dev)) 61 return -EINVAL; 62 if (dev != sst) 63 return -EINVAL; 64 65 mutex_lock(&sst_lock); 66 67 if (!sst) { 68 mutex_unlock(&sst_lock); 69 return -EIO; 70 } 71 72 module_put(sst->dev->driver->owner); 73 dev_dbg(dev->dev, "unreg %s\n", sst->name); 74 sst = NULL; 75 mutex_unlock(&sst_lock); 76 return 0; 77 } 78 EXPORT_SYMBOL_GPL(sst_unregister_dsp); 79 80 static struct snd_pcm_hardware sst_platform_pcm_hw = { 81 .info = (SNDRV_PCM_INFO_INTERLEAVED | 82 SNDRV_PCM_INFO_DOUBLE | 83 SNDRV_PCM_INFO_PAUSE | 84 SNDRV_PCM_INFO_RESUME | 85 SNDRV_PCM_INFO_MMAP| 86 SNDRV_PCM_INFO_MMAP_VALID | 87 SNDRV_PCM_INFO_BLOCK_TRANSFER | 88 SNDRV_PCM_INFO_SYNC_START), 89 .buffer_bytes_max = SST_MAX_BUFFER, 90 .period_bytes_min = SST_MIN_PERIOD_BYTES, 91 .period_bytes_max = SST_MAX_PERIOD_BYTES, 92 .periods_min = SST_MIN_PERIODS, 93 .periods_max = SST_MAX_PERIODS, 94 .fifo_size = SST_FIFO_SIZE, 95 }; 96 97 static struct sst_dev_stream_map dpcm_strm_map[] = { 98 {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF}, /* Reserved, not in use */ 99 {MERR_DPCM_AUDIO, 0, SNDRV_PCM_STREAM_PLAYBACK, PIPE_MEDIA1_IN, SST_TASK_ID_MEDIA, 0}, 100 {MERR_DPCM_COMPR, 0, SNDRV_PCM_STREAM_PLAYBACK, PIPE_MEDIA0_IN, SST_TASK_ID_MEDIA, 0}, 101 {MERR_DPCM_AUDIO, 0, SNDRV_PCM_STREAM_CAPTURE, PIPE_PCM1_OUT, 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 ret_val = 0, 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 ret_val = stream->ops->close(sst->dev, str_id); 368 module_put(sst->dev->driver->owner); 369 kfree(stream); 370 } 371 372 static inline unsigned int get_current_pipe_id(struct snd_soc_dai *dai, 373 struct snd_pcm_substream *substream) 374 { 375 struct sst_data *sst = snd_soc_dai_get_drvdata(dai); 376 struct sst_dev_stream_map *map = sst->pdata->pdev_strm_map; 377 struct sst_runtime_stream *stream = 378 substream->runtime->private_data; 379 u32 str_id = stream->stream_info.str_id; 380 unsigned int pipe_id; 381 382 pipe_id = map[str_id].device_id; 383 384 dev_dbg(dai->dev, "got pipe_id = %#x for str_id = %d\n", 385 pipe_id, str_id); 386 return pipe_id; 387 } 388 389 static int sst_media_prepare(struct snd_pcm_substream *substream, 390 struct snd_soc_dai *dai) 391 { 392 struct sst_runtime_stream *stream; 393 int ret_val = 0, str_id; 394 395 stream = substream->runtime->private_data; 396 str_id = stream->stream_info.str_id; 397 if (stream->stream_info.str_id) { 398 ret_val = stream->ops->stream_drop(sst->dev, str_id); 399 return ret_val; 400 } 401 402 ret_val = sst_platform_alloc_stream(substream, dai); 403 if (ret_val <= 0) 404 return ret_val; 405 snprintf(substream->pcm->id, sizeof(substream->pcm->id), 406 "%d", stream->stream_info.str_id); 407 408 ret_val = sst_platform_init_stream(substream); 409 if (ret_val) 410 return ret_val; 411 substream->runtime->hw.info = SNDRV_PCM_INFO_BLOCK_TRANSFER; 412 return ret_val; 413 } 414 415 static int sst_media_hw_params(struct snd_pcm_substream *substream, 416 struct snd_pcm_hw_params *params, 417 struct snd_soc_dai *dai) 418 { 419 snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(params)); 420 memset(substream->runtime->dma_area, 0, params_buffer_bytes(params)); 421 return 0; 422 } 423 424 static int sst_media_hw_free(struct snd_pcm_substream *substream, 425 struct snd_soc_dai *dai) 426 { 427 return snd_pcm_lib_free_pages(substream); 428 } 429 430 static int sst_enable_ssp(struct snd_pcm_substream *substream, 431 struct snd_soc_dai *dai) 432 { 433 int ret = 0; 434 435 if (!dai->active) { 436 ret = sst_handle_vb_timer(dai, true); 437 sst_fill_ssp_defaults(dai); 438 } 439 return ret; 440 } 441 442 static int sst_be_hw_params(struct snd_pcm_substream *substream, 443 struct snd_pcm_hw_params *params, 444 struct snd_soc_dai *dai) 445 { 446 int ret = 0; 447 448 if (dai->active == 1) 449 ret = send_ssp_cmd(dai, dai->name, 1); 450 return ret; 451 } 452 453 static int sst_set_format(struct snd_soc_dai *dai, unsigned int fmt) 454 { 455 int ret = 0; 456 457 if (!dai->active) 458 return 0; 459 460 ret = sst_fill_ssp_config(dai, fmt); 461 if (ret < 0) 462 dev_err(dai->dev, "sst_set_format failed..\n"); 463 464 return ret; 465 } 466 467 static int sst_platform_set_ssp_slot(struct snd_soc_dai *dai, 468 unsigned int tx_mask, unsigned int rx_mask, 469 int slots, int slot_width) { 470 int ret = 0; 471 472 if (!dai->active) 473 return ret; 474 475 ret = sst_fill_ssp_slot(dai, tx_mask, rx_mask, slots, slot_width); 476 if (ret < 0) 477 dev_err(dai->dev, "sst_fill_ssp_slot failed..%d\n", ret); 478 479 return ret; 480 } 481 482 static void sst_disable_ssp(struct snd_pcm_substream *substream, 483 struct snd_soc_dai *dai) 484 { 485 if (!dai->active) { 486 send_ssp_cmd(dai, dai->name, 0); 487 sst_handle_vb_timer(dai, false); 488 } 489 } 490 491 static struct snd_soc_dai_ops sst_media_dai_ops = { 492 .startup = sst_media_open, 493 .shutdown = sst_media_close, 494 .prepare = sst_media_prepare, 495 .hw_params = sst_media_hw_params, 496 .hw_free = sst_media_hw_free, 497 .mute_stream = sst_media_digital_mute, 498 }; 499 500 static struct snd_soc_dai_ops sst_compr_dai_ops = { 501 .mute_stream = sst_media_digital_mute, 502 }; 503 504 static struct snd_soc_dai_ops sst_be_dai_ops = { 505 .startup = sst_enable_ssp, 506 .hw_params = sst_be_hw_params, 507 .set_fmt = sst_set_format, 508 .set_tdm_slot = sst_platform_set_ssp_slot, 509 .shutdown = sst_disable_ssp, 510 }; 511 512 static struct snd_soc_dai_driver sst_platform_dai[] = { 513 { 514 .name = "media-cpu-dai", 515 .ops = &sst_media_dai_ops, 516 .playback = { 517 .stream_name = "Headset Playback", 518 .channels_min = SST_STEREO, 519 .channels_max = SST_STEREO, 520 .rates = SNDRV_PCM_RATE_44100|SNDRV_PCM_RATE_48000, 521 .formats = SNDRV_PCM_FMTBIT_S16_LE, 522 }, 523 .capture = { 524 .stream_name = "Headset Capture", 525 .channels_min = 1, 526 .channels_max = 2, 527 .rates = SNDRV_PCM_RATE_44100|SNDRV_PCM_RATE_48000, 528 .formats = SNDRV_PCM_FMTBIT_S16_LE, 529 }, 530 }, 531 { 532 .name = "compress-cpu-dai", 533 .compress_dai = 1, 534 .ops = &sst_compr_dai_ops, 535 .playback = { 536 .stream_name = "Compress Playback", 537 .channels_min = SST_STEREO, 538 .channels_max = SST_STEREO, 539 .rates = SNDRV_PCM_RATE_48000, 540 .formats = SNDRV_PCM_FMTBIT_S16_LE, 541 }, 542 }, 543 /* BE CPU Dais */ 544 { 545 .name = "ssp0-port", 546 .ops = &sst_be_dai_ops, 547 .playback = { 548 .stream_name = "ssp0 Tx", 549 .channels_min = SST_STEREO, 550 .channels_max = SST_STEREO, 551 .rates = SNDRV_PCM_RATE_48000, 552 .formats = SNDRV_PCM_FMTBIT_S16_LE, 553 }, 554 .capture = { 555 .stream_name = "ssp0 Rx", 556 .channels_min = SST_STEREO, 557 .channels_max = SST_STEREO, 558 .rates = SNDRV_PCM_RATE_48000, 559 .formats = SNDRV_PCM_FMTBIT_S16_LE, 560 }, 561 }, 562 { 563 .name = "ssp1-port", 564 .ops = &sst_be_dai_ops, 565 .playback = { 566 .stream_name = "ssp1 Tx", 567 .channels_min = SST_STEREO, 568 .channels_max = SST_STEREO, 569 .rates = SNDRV_PCM_RATE_8000|SNDRV_PCM_RATE_16000|SNDRV_PCM_RATE_48000, 570 .formats = SNDRV_PCM_FMTBIT_S16_LE, 571 }, 572 .capture = { 573 .stream_name = "ssp1 Rx", 574 .channels_min = SST_STEREO, 575 .channels_max = SST_STEREO, 576 .rates = SNDRV_PCM_RATE_8000|SNDRV_PCM_RATE_16000|SNDRV_PCM_RATE_48000, 577 .formats = SNDRV_PCM_FMTBIT_S16_LE, 578 }, 579 }, 580 { 581 .name = "ssp2-port", 582 .ops = &sst_be_dai_ops, 583 .playback = { 584 .stream_name = "ssp2 Tx", 585 .channels_min = SST_STEREO, 586 .channels_max = SST_STEREO, 587 .rates = SNDRV_PCM_RATE_48000, 588 .formats = SNDRV_PCM_FMTBIT_S16_LE, 589 }, 590 .capture = { 591 .stream_name = "ssp2 Rx", 592 .channels_min = SST_STEREO, 593 .channels_max = SST_STEREO, 594 .rates = SNDRV_PCM_RATE_48000, 595 .formats = SNDRV_PCM_FMTBIT_S16_LE, 596 }, 597 }, 598 }; 599 600 static int sst_platform_open(struct snd_pcm_substream *substream) 601 { 602 struct snd_pcm_runtime *runtime; 603 604 if (substream->pcm->internal) 605 return 0; 606 607 runtime = substream->runtime; 608 runtime->hw = sst_platform_pcm_hw; 609 return 0; 610 } 611 612 static int sst_platform_pcm_trigger(struct snd_pcm_substream *substream, 613 int cmd) 614 { 615 int ret_val = 0, str_id; 616 struct sst_runtime_stream *stream; 617 int status; 618 struct snd_soc_pcm_runtime *rtd = substream->private_data; 619 620 dev_dbg(rtd->dev, "sst_platform_pcm_trigger called\n"); 621 if (substream->pcm->internal) 622 return 0; 623 stream = substream->runtime->private_data; 624 str_id = stream->stream_info.str_id; 625 switch (cmd) { 626 case SNDRV_PCM_TRIGGER_START: 627 dev_dbg(rtd->dev, "sst: Trigger Start\n"); 628 status = SST_PLATFORM_RUNNING; 629 stream->stream_info.arg = substream; 630 ret_val = stream->ops->stream_start(sst->dev, str_id); 631 break; 632 case SNDRV_PCM_TRIGGER_STOP: 633 dev_dbg(rtd->dev, "sst: in stop\n"); 634 status = SST_PLATFORM_DROPPED; 635 ret_val = stream->ops->stream_drop(sst->dev, str_id); 636 break; 637 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 638 case SNDRV_PCM_TRIGGER_SUSPEND: 639 dev_dbg(rtd->dev, "sst: in pause\n"); 640 status = SST_PLATFORM_PAUSED; 641 ret_val = stream->ops->stream_pause(sst->dev, str_id); 642 break; 643 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 644 case SNDRV_PCM_TRIGGER_RESUME: 645 dev_dbg(rtd->dev, "sst: in pause release\n"); 646 status = SST_PLATFORM_RUNNING; 647 ret_val = stream->ops->stream_pause_release(sst->dev, str_id); 648 break; 649 default: 650 return -EINVAL; 651 } 652 653 if (!ret_val) 654 sst_set_stream_status(stream, status); 655 656 return ret_val; 657 } 658 659 660 static snd_pcm_uframes_t sst_platform_pcm_pointer 661 (struct snd_pcm_substream *substream) 662 { 663 struct sst_runtime_stream *stream; 664 int ret_val, status; 665 struct pcm_stream_info *str_info; 666 struct snd_soc_pcm_runtime *rtd = substream->private_data; 667 668 stream = substream->runtime->private_data; 669 status = sst_get_stream_status(stream); 670 if (status == SST_PLATFORM_INIT) 671 return 0; 672 str_info = &stream->stream_info; 673 ret_val = stream->ops->stream_read_tstamp(sst->dev, str_info); 674 if (ret_val) { 675 dev_err(rtd->dev, "sst: error code = %d\n", ret_val); 676 return ret_val; 677 } 678 substream->runtime->delay = str_info->pcm_delay; 679 return str_info->buffer_ptr; 680 } 681 682 static struct snd_pcm_ops sst_platform_ops = { 683 .open = sst_platform_open, 684 .ioctl = snd_pcm_lib_ioctl, 685 .trigger = sst_platform_pcm_trigger, 686 .pointer = sst_platform_pcm_pointer, 687 }; 688 689 static int sst_pcm_new(struct snd_soc_pcm_runtime *rtd) 690 { 691 struct snd_soc_dai *dai = rtd->cpu_dai; 692 struct snd_pcm *pcm = rtd->pcm; 693 int retval = 0; 694 695 if (dai->driver->playback.channels_min || 696 dai->driver->capture.channels_min) { 697 retval = snd_pcm_lib_preallocate_pages_for_all(pcm, 698 SNDRV_DMA_TYPE_CONTINUOUS, 699 snd_dma_continuous_data(GFP_DMA), 700 SST_MIN_BUFFER, SST_MAX_BUFFER); 701 if (retval) { 702 dev_err(rtd->dev, "dma buffer allocationf fail\n"); 703 return retval; 704 } 705 } 706 return retval; 707 } 708 709 static int sst_soc_probe(struct snd_soc_platform *platform) 710 { 711 struct sst_data *drv = dev_get_drvdata(platform->dev); 712 713 drv->soc_card = platform->component.card; 714 return sst_dsp_init_v2_dpcm(platform); 715 } 716 717 static struct snd_soc_platform_driver sst_soc_platform_drv = { 718 .probe = sst_soc_probe, 719 .ops = &sst_platform_ops, 720 .compr_ops = &sst_platform_compr_ops, 721 .pcm_new = sst_pcm_new, 722 }; 723 724 static const struct snd_soc_component_driver sst_component = { 725 .name = "sst", 726 }; 727 728 729 static int sst_platform_probe(struct platform_device *pdev) 730 { 731 struct sst_data *drv; 732 int ret; 733 struct sst_platform_data *pdata; 734 735 drv = devm_kzalloc(&pdev->dev, sizeof(*drv), GFP_KERNEL); 736 if (drv == NULL) { 737 return -ENOMEM; 738 } 739 740 pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL); 741 if (pdata == NULL) { 742 return -ENOMEM; 743 } 744 745 pdata->pdev_strm_map = dpcm_strm_map; 746 pdata->strm_map_size = ARRAY_SIZE(dpcm_strm_map); 747 drv->pdata = pdata; 748 drv->pdev = pdev; 749 mutex_init(&drv->lock); 750 dev_set_drvdata(&pdev->dev, drv); 751 752 ret = snd_soc_register_platform(&pdev->dev, &sst_soc_platform_drv); 753 if (ret) { 754 dev_err(&pdev->dev, "registering soc platform failed\n"); 755 return ret; 756 } 757 758 ret = snd_soc_register_component(&pdev->dev, &sst_component, 759 sst_platform_dai, ARRAY_SIZE(sst_platform_dai)); 760 if (ret) { 761 dev_err(&pdev->dev, "registering cpu dais failed\n"); 762 snd_soc_unregister_platform(&pdev->dev); 763 } 764 return ret; 765 } 766 767 static int sst_platform_remove(struct platform_device *pdev) 768 { 769 770 snd_soc_unregister_component(&pdev->dev); 771 snd_soc_unregister_platform(&pdev->dev); 772 dev_dbg(&pdev->dev, "sst_platform_remove success\n"); 773 return 0; 774 } 775 776 #ifdef CONFIG_PM_SLEEP 777 778 static int sst_soc_prepare(struct device *dev) 779 { 780 struct sst_data *drv = dev_get_drvdata(dev); 781 int i; 782 783 /* suspend all pcms first */ 784 snd_soc_suspend(drv->soc_card->dev); 785 snd_soc_poweroff(drv->soc_card->dev); 786 787 /* set the SSPs to idle */ 788 for (i = 0; i < drv->soc_card->num_rtd; i++) { 789 struct snd_soc_dai *dai = drv->soc_card->rtd[i].cpu_dai; 790 791 if (dai->active) { 792 send_ssp_cmd(dai, dai->name, 0); 793 sst_handle_vb_timer(dai, false); 794 } 795 } 796 797 return 0; 798 } 799 800 static void sst_soc_complete(struct device *dev) 801 { 802 struct sst_data *drv = dev_get_drvdata(dev); 803 int i; 804 805 /* restart SSPs */ 806 for (i = 0; i < drv->soc_card->num_rtd; i++) { 807 struct snd_soc_dai *dai = drv->soc_card->rtd[i].cpu_dai; 808 809 if (dai->active) { 810 sst_handle_vb_timer(dai, true); 811 send_ssp_cmd(dai, dai->name, 1); 812 } 813 } 814 snd_soc_resume(drv->soc_card->dev); 815 } 816 817 #else 818 819 #define sst_soc_prepare NULL 820 #define sst_soc_complete NULL 821 822 #endif 823 824 825 static const struct dev_pm_ops sst_platform_pm = { 826 .prepare = sst_soc_prepare, 827 .complete = sst_soc_complete, 828 }; 829 830 static struct platform_driver sst_platform_driver = { 831 .driver = { 832 .name = "sst-mfld-platform", 833 .pm = &sst_platform_pm, 834 }, 835 .probe = sst_platform_probe, 836 .remove = sst_platform_remove, 837 }; 838 839 module_platform_driver(sst_platform_driver); 840 841 MODULE_DESCRIPTION("ASoC Intel(R) MID Platform driver"); 842 MODULE_AUTHOR("Vinod Koul <vinod.koul@intel.com>"); 843 MODULE_AUTHOR("Harsha Priya <priya.harsha@intel.com>"); 844 MODULE_LICENSE("GPL v2"); 845 MODULE_ALIAS("platform:sst-mfld-platform"); 846