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