1 // SPDX-License-Identifier: GPL-2.0 2 // Copyright (C) 2019 Spreadtrum Communications Inc. 3 4 #include <linux/dma-mapping.h> 5 #include <linux/dmaengine.h> 6 #include <linux/dma/sprd-dma.h> 7 #include <linux/kernel.h> 8 #include <linux/module.h> 9 #include <sound/pcm.h> 10 #include <sound/pcm_params.h> 11 #include <sound/soc.h> 12 #include <sound/compress_driver.h> 13 14 #include "sprd-pcm-dma.h" 15 16 #define SPRD_COMPR_DMA_CHANS 2 17 18 /* Default values if userspace does not set */ 19 #define SPRD_COMPR_MIN_FRAGMENT_SIZE SZ_8K 20 #define SPRD_COMPR_MAX_FRAGMENT_SIZE SZ_128K 21 #define SPRD_COMPR_MIN_NUM_FRAGMENTS 4 22 #define SPRD_COMPR_MAX_NUM_FRAGMENTS 64 23 24 /* DSP FIFO size */ 25 #define SPRD_COMPR_MCDT_EMPTY_WMK 0 26 #define SPRD_COMPR_MCDT_FIFO_SIZE 512 27 28 /* Stage 0 IRAM buffer size definition */ 29 #define SPRD_COMPR_IRAM_BUF_SIZE SZ_32K 30 #define SPRD_COMPR_IRAM_INFO_SIZE (sizeof(struct sprd_compr_playinfo)) 31 #define SPRD_COMPR_IRAM_LINKLIST_SIZE (1024 - SPRD_COMPR_IRAM_INFO_SIZE) 32 #define SPRD_COMPR_IRAM_SIZE (SPRD_COMPR_IRAM_BUF_SIZE + \ 33 SPRD_COMPR_IRAM_INFO_SIZE + \ 34 SPRD_COMPR_IRAM_LINKLIST_SIZE) 35 36 /* Stage 1 DDR buffer size definition */ 37 #define SPRD_COMPR_AREA_BUF_SIZE SZ_2M 38 #define SPRD_COMPR_AREA_LINKLIST_SIZE 1024 39 #define SPRD_COMPR_AREA_SIZE (SPRD_COMPR_AREA_BUF_SIZE + \ 40 SPRD_COMPR_AREA_LINKLIST_SIZE) 41 42 struct sprd_compr_dma { 43 struct dma_chan *chan; 44 struct dma_async_tx_descriptor *desc; 45 dma_cookie_t cookie; 46 dma_addr_t phys; 47 void *virt; 48 int trans_len; 49 }; 50 51 /* 52 * The Spreadtrum Audio compress offload mode will use 2-stage DMA transfer to 53 * save power. That means we can request 2 dma channels, one for source channel, 54 * and another one for destination channel. Once the source channel's transaction 55 * is done, it will trigger the destination channel's transaction automatically 56 * by hardware signal. 57 * 58 * For 2-stage DMA transfer, we can allocate 2 buffers: IRAM buffer (always 59 * power-on) and DDR buffer. The source channel will transfer data from IRAM 60 * buffer to the DSP fifo to decoding/encoding, once IRAM buffer is empty by 61 * transferring done, the destination channel will start to transfer data from 62 * DDR buffer to IRAM buffer. 63 * 64 * Since the DSP fifo is only 512B, IRAM buffer is allocated by 32K, and DDR 65 * buffer is larger to 2M. That means only the IRAM 32k data is transferred 66 * done, we can wake up the AP system to transfer data from DDR to IRAM, and 67 * other time the AP system can be suspended to save power. 68 */ 69 struct sprd_compr_stream { 70 struct snd_compr_stream *cstream; 71 struct sprd_compr_ops *compr_ops; 72 struct sprd_compr_dma dma[SPRD_COMPR_DMA_CHANS]; 73 74 /* DMA engine channel number */ 75 int num_channels; 76 77 /* Stage 0 IRAM buffer */ 78 struct snd_dma_buffer iram_buffer; 79 /* Stage 1 DDR buffer */ 80 struct snd_dma_buffer compr_buffer; 81 82 /* DSP play information IRAM buffer */ 83 dma_addr_t info_phys; 84 void *info_area; 85 int info_size; 86 87 /* Data size copied to IRAM buffer */ 88 int copied_total; 89 /* Total received data size from userspace */ 90 int received_total; 91 /* Stage 0 IRAM buffer received data size */ 92 int received_stage0; 93 /* Stage 1 DDR buffer received data size */ 94 int received_stage1; 95 /* Stage 1 DDR buffer pointer */ 96 int stage1_pointer; 97 }; 98 99 static int sprd_platform_compr_trigger(struct snd_soc_component *component, 100 struct snd_compr_stream *cstream, 101 int cmd); 102 103 static void sprd_platform_compr_drain_notify(void *arg) 104 { 105 struct snd_compr_stream *cstream = arg; 106 struct snd_compr_runtime *runtime = cstream->runtime; 107 struct sprd_compr_stream *stream = runtime->private_data; 108 109 memset(stream->info_area, 0, sizeof(struct sprd_compr_playinfo)); 110 111 snd_compr_drain_notify(cstream); 112 } 113 114 static void sprd_platform_compr_dma_complete(void *data) 115 { 116 struct snd_compr_stream *cstream = data; 117 struct snd_compr_runtime *runtime = cstream->runtime; 118 struct sprd_compr_stream *stream = runtime->private_data; 119 struct sprd_compr_dma *dma = &stream->dma[1]; 120 121 /* Update data size copied to IRAM buffer */ 122 stream->copied_total += dma->trans_len; 123 if (stream->copied_total > stream->received_total) 124 stream->copied_total = stream->received_total; 125 126 snd_compr_fragment_elapsed(cstream); 127 } 128 129 static int sprd_platform_compr_dma_config(struct snd_soc_component *component, 130 struct snd_compr_stream *cstream, 131 struct snd_compr_params *params, 132 int channel) 133 { 134 struct snd_compr_runtime *runtime = cstream->runtime; 135 struct sprd_compr_stream *stream = runtime->private_data; 136 struct snd_soc_pcm_runtime *rtd = cstream->private_data; 137 struct device *dev = component->dev; 138 struct sprd_compr_data *data = snd_soc_dai_get_drvdata(snd_soc_rtd_to_cpu(rtd, 0)); 139 struct sprd_pcm_dma_params *dma_params = data->dma_params; 140 struct sprd_compr_dma *dma = &stream->dma[channel]; 141 struct dma_slave_config config = { }; 142 struct sprd_dma_linklist link = { }; 143 enum dma_transfer_direction dir; 144 struct scatterlist *sg, *sgt; 145 enum dma_slave_buswidth bus_width; 146 int period, period_cnt, sg_num = 2; 147 dma_addr_t src_addr, dst_addr; 148 unsigned long flags; 149 int ret, j; 150 151 if (!dma_params) { 152 dev_err(dev, "no dma parameters setting\n"); 153 return -EINVAL; 154 } 155 156 dma->chan = dma_request_slave_channel(dev, 157 dma_params->chan_name[channel]); 158 if (!dma->chan) { 159 dev_err(dev, "failed to request dma channel\n"); 160 return -ENODEV; 161 } 162 163 sgt = sg = devm_kcalloc(dev, sg_num, sizeof(*sg), GFP_KERNEL); 164 if (!sg) { 165 ret = -ENOMEM; 166 goto sg_err; 167 } 168 169 switch (channel) { 170 case 0: 171 bus_width = DMA_SLAVE_BUSWIDTH_4_BYTES; 172 period = (SPRD_COMPR_MCDT_FIFO_SIZE - SPRD_COMPR_MCDT_EMPTY_WMK) * 4; 173 period_cnt = params->buffer.fragment_size / period; 174 src_addr = stream->iram_buffer.addr; 175 dst_addr = dma_params->dev_phys[channel]; 176 flags = SPRD_DMA_FLAGS(SPRD_DMA_SRC_CHN1, 177 SPRD_DMA_TRANS_DONE_TRG, 178 SPRD_DMA_FRAG_REQ, 179 SPRD_DMA_TRANS_INT); 180 break; 181 182 case 1: 183 bus_width = DMA_SLAVE_BUSWIDTH_2_BYTES; 184 period = params->buffer.fragment_size; 185 period_cnt = params->buffer.fragments; 186 src_addr = stream->compr_buffer.addr; 187 dst_addr = stream->iram_buffer.addr; 188 flags = SPRD_DMA_FLAGS(SPRD_DMA_DST_CHN1, 189 SPRD_DMA_TRANS_DONE_TRG, 190 SPRD_DMA_FRAG_REQ, 191 SPRD_DMA_TRANS_INT); 192 break; 193 194 default: 195 ret = -EINVAL; 196 goto config_err; 197 } 198 199 dma->trans_len = period * period_cnt; 200 201 config.src_maxburst = period; 202 config.src_addr_width = bus_width; 203 config.dst_addr_width = bus_width; 204 if (cstream->direction == SND_COMPRESS_PLAYBACK) { 205 config.src_addr = src_addr; 206 config.dst_addr = dst_addr; 207 dir = DMA_MEM_TO_DEV; 208 } else { 209 config.src_addr = dst_addr; 210 config.dst_addr = src_addr; 211 dir = DMA_DEV_TO_MEM; 212 } 213 214 sg_init_table(sgt, sg_num); 215 for (j = 0; j < sg_num; j++, sgt++) { 216 sg_dma_len(sgt) = dma->trans_len; 217 sg_dma_address(sgt) = dst_addr; 218 } 219 220 /* 221 * Configure the link-list address for the DMA engine link-list 222 * mode. 223 */ 224 link.virt_addr = (unsigned long)dma->virt; 225 link.phy_addr = dma->phys; 226 227 ret = dmaengine_slave_config(dma->chan, &config); 228 if (ret) { 229 dev_err(dev, 230 "failed to set slave configuration: %d\n", ret); 231 goto config_err; 232 } 233 234 /* 235 * We configure the DMA request mode, interrupt mode, channel 236 * mode and channel trigger mode by the flags. 237 */ 238 dma->desc = dma->chan->device->device_prep_slave_sg(dma->chan, sg, 239 sg_num, dir, 240 flags, &link); 241 if (!dma->desc) { 242 dev_err(dev, "failed to prepare slave sg\n"); 243 ret = -ENOMEM; 244 goto config_err; 245 } 246 247 /* Only channel 1 transfer can wake up the AP system. */ 248 if (!params->no_wake_mode && channel == 1) { 249 dma->desc->callback = sprd_platform_compr_dma_complete; 250 dma->desc->callback_param = cstream; 251 } 252 253 devm_kfree(dev, sg); 254 255 return 0; 256 257 config_err: 258 devm_kfree(dev, sg); 259 sg_err: 260 dma_release_channel(dma->chan); 261 return ret; 262 } 263 264 static int sprd_platform_compr_set_params(struct snd_soc_component *component, 265 struct snd_compr_stream *cstream, 266 struct snd_compr_params *params) 267 { 268 struct snd_compr_runtime *runtime = cstream->runtime; 269 struct sprd_compr_stream *stream = runtime->private_data; 270 struct device *dev = component->dev; 271 struct sprd_compr_params compr_params = { }; 272 int ret; 273 274 /* 275 * Configure the DMA engine 2-stage transfer mode. Channel 1 set as the 276 * destination channel, and channel 0 set as the source channel, that 277 * means once the source channel's transaction is done, it will trigger 278 * the destination channel's transaction automatically. 279 */ 280 ret = sprd_platform_compr_dma_config(component, cstream, params, 1); 281 if (ret) { 282 dev_err(dev, "failed to config stage 1 DMA: %d\n", ret); 283 return ret; 284 } 285 286 ret = sprd_platform_compr_dma_config(component, cstream, params, 0); 287 if (ret) { 288 dev_err(dev, "failed to config stage 0 DMA: %d\n", ret); 289 goto config_err; 290 } 291 292 compr_params.direction = cstream->direction; 293 compr_params.sample_rate = params->codec.sample_rate; 294 compr_params.channels = stream->num_channels; 295 compr_params.info_phys = stream->info_phys; 296 compr_params.info_size = stream->info_size; 297 compr_params.rate = params->codec.bit_rate; 298 compr_params.format = params->codec.id; 299 300 ret = stream->compr_ops->set_params(cstream->direction, &compr_params); 301 if (ret) { 302 dev_err(dev, "failed to set parameters: %d\n", ret); 303 goto params_err; 304 } 305 306 return 0; 307 308 params_err: 309 dma_release_channel(stream->dma[0].chan); 310 config_err: 311 dma_release_channel(stream->dma[1].chan); 312 return ret; 313 } 314 315 static int sprd_platform_compr_open(struct snd_soc_component *component, 316 struct snd_compr_stream *cstream) 317 { 318 struct snd_compr_runtime *runtime = cstream->runtime; 319 struct snd_soc_pcm_runtime *rtd = cstream->private_data; 320 struct device *dev = component->dev; 321 struct sprd_compr_data *data = snd_soc_dai_get_drvdata(snd_soc_rtd_to_cpu(rtd, 0)); 322 struct sprd_compr_stream *stream; 323 struct sprd_compr_callback cb; 324 int stream_id = cstream->direction, ret; 325 326 ret = dma_coerce_mask_and_coherent(dev, DMA_BIT_MASK(32)); 327 if (ret) 328 return ret; 329 330 stream = devm_kzalloc(dev, sizeof(*stream), GFP_KERNEL); 331 if (!stream) 332 return -ENOMEM; 333 334 stream->cstream = cstream; 335 stream->num_channels = 2; 336 stream->compr_ops = data->ops; 337 338 /* 339 * Allocate the stage 0 IRAM buffer size, including the DMA 0 340 * link-list size and play information of DSP address size. 341 */ 342 ret = snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV_IRAM, dev, 343 SPRD_COMPR_IRAM_SIZE, &stream->iram_buffer); 344 if (ret < 0) 345 goto err_iram; 346 347 /* Use to save link-list configuration for DMA 0. */ 348 stream->dma[0].virt = stream->iram_buffer.area + SPRD_COMPR_IRAM_SIZE; 349 stream->dma[0].phys = stream->iram_buffer.addr + SPRD_COMPR_IRAM_SIZE; 350 351 /* Use to update the current data offset of DSP. */ 352 stream->info_phys = stream->iram_buffer.addr + SPRD_COMPR_IRAM_SIZE + 353 SPRD_COMPR_IRAM_LINKLIST_SIZE; 354 stream->info_area = stream->iram_buffer.area + SPRD_COMPR_IRAM_SIZE + 355 SPRD_COMPR_IRAM_LINKLIST_SIZE; 356 stream->info_size = SPRD_COMPR_IRAM_INFO_SIZE; 357 358 /* 359 * Allocate the stage 1 DDR buffer size, including the DMA 1 link-list 360 * size. 361 */ 362 ret = snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, dev, 363 SPRD_COMPR_AREA_SIZE, &stream->compr_buffer); 364 if (ret < 0) 365 goto err_compr; 366 367 /* Use to save link-list configuration for DMA 1. */ 368 stream->dma[1].virt = stream->compr_buffer.area + SPRD_COMPR_AREA_SIZE; 369 stream->dma[1].phys = stream->compr_buffer.addr + SPRD_COMPR_AREA_SIZE; 370 371 cb.drain_notify = sprd_platform_compr_drain_notify; 372 cb.drain_data = cstream; 373 ret = stream->compr_ops->open(stream_id, &cb); 374 if (ret) { 375 dev_err(dev, "failed to open compress platform: %d\n", ret); 376 goto err_open; 377 } 378 379 runtime->private_data = stream; 380 return 0; 381 382 err_open: 383 snd_dma_free_pages(&stream->compr_buffer); 384 err_compr: 385 snd_dma_free_pages(&stream->iram_buffer); 386 err_iram: 387 devm_kfree(dev, stream); 388 389 return ret; 390 } 391 392 static int sprd_platform_compr_free(struct snd_soc_component *component, 393 struct snd_compr_stream *cstream) 394 { 395 struct snd_compr_runtime *runtime = cstream->runtime; 396 struct sprd_compr_stream *stream = runtime->private_data; 397 struct device *dev = component->dev; 398 int stream_id = cstream->direction, i; 399 400 for (i = 0; i < stream->num_channels; i++) { 401 struct sprd_compr_dma *dma = &stream->dma[i]; 402 403 if (dma->chan) { 404 dma_release_channel(dma->chan); 405 dma->chan = NULL; 406 } 407 } 408 409 snd_dma_free_pages(&stream->compr_buffer); 410 snd_dma_free_pages(&stream->iram_buffer); 411 412 stream->compr_ops->close(stream_id); 413 414 devm_kfree(dev, stream); 415 return 0; 416 } 417 418 static int sprd_platform_compr_trigger(struct snd_soc_component *component, 419 struct snd_compr_stream *cstream, 420 int cmd) 421 { 422 struct snd_compr_runtime *runtime = cstream->runtime; 423 struct sprd_compr_stream *stream = runtime->private_data; 424 struct device *dev = component->dev; 425 int channels = stream->num_channels, ret = 0, i; 426 int stream_id = cstream->direction; 427 428 if (cstream->direction != SND_COMPRESS_PLAYBACK) { 429 dev_err(dev, "unsupported compress direction\n"); 430 return -EINVAL; 431 } 432 433 switch (cmd) { 434 case SNDRV_PCM_TRIGGER_START: 435 for (i = channels - 1; i >= 0; i--) { 436 struct sprd_compr_dma *dma = &stream->dma[i]; 437 438 if (!dma->desc) 439 continue; 440 441 dma->cookie = dmaengine_submit(dma->desc); 442 ret = dma_submit_error(dma->cookie); 443 if (ret) { 444 dev_err(dev, "failed to submit request: %d\n", 445 ret); 446 return ret; 447 } 448 } 449 450 for (i = channels - 1; i >= 0; i--) { 451 struct sprd_compr_dma *dma = &stream->dma[i]; 452 453 if (dma->chan) 454 dma_async_issue_pending(dma->chan); 455 } 456 457 ret = stream->compr_ops->start(stream_id); 458 break; 459 460 case SNDRV_PCM_TRIGGER_STOP: 461 for (i = channels - 1; i >= 0; i--) { 462 struct sprd_compr_dma *dma = &stream->dma[i]; 463 464 if (dma->chan) 465 dmaengine_terminate_async(dma->chan); 466 } 467 468 stream->copied_total = 0; 469 stream->stage1_pointer = 0; 470 stream->received_total = 0; 471 stream->received_stage0 = 0; 472 stream->received_stage1 = 0; 473 474 ret = stream->compr_ops->stop(stream_id); 475 break; 476 477 case SNDRV_PCM_TRIGGER_SUSPEND: 478 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 479 for (i = channels - 1; i >= 0; i--) { 480 struct sprd_compr_dma *dma = &stream->dma[i]; 481 482 if (dma->chan) 483 dmaengine_pause(dma->chan); 484 } 485 486 ret = stream->compr_ops->pause(stream_id); 487 break; 488 489 case SNDRV_PCM_TRIGGER_RESUME: 490 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 491 for (i = channels - 1; i >= 0; i--) { 492 struct sprd_compr_dma *dma = &stream->dma[i]; 493 494 if (dma->chan) 495 dmaengine_resume(dma->chan); 496 } 497 498 ret = stream->compr_ops->pause_release(stream_id); 499 break; 500 501 case SND_COMPR_TRIGGER_PARTIAL_DRAIN: 502 case SND_COMPR_TRIGGER_DRAIN: 503 ret = stream->compr_ops->drain(stream->received_total); 504 break; 505 506 default: 507 ret = -EINVAL; 508 break; 509 } 510 511 return ret; 512 } 513 514 static int sprd_platform_compr_pointer(struct snd_soc_component *component, 515 struct snd_compr_stream *cstream, 516 struct snd_compr_tstamp *tstamp) 517 { 518 struct snd_compr_runtime *runtime = cstream->runtime; 519 struct sprd_compr_stream *stream = runtime->private_data; 520 struct sprd_compr_playinfo *info = 521 (struct sprd_compr_playinfo *)stream->info_area; 522 523 tstamp->copied_total = stream->copied_total; 524 tstamp->pcm_io_frames = info->current_data_offset; 525 526 return 0; 527 } 528 529 static int sprd_platform_compr_copy(struct snd_soc_component *component, 530 struct snd_compr_stream *cstream, 531 char __user *buf, size_t count) 532 { 533 struct snd_compr_runtime *runtime = cstream->runtime; 534 struct sprd_compr_stream *stream = runtime->private_data; 535 int avail_bytes, data_count = count; 536 void *dst; 537 538 /* 539 * We usually set fragment size as 32K, and the stage 0 IRAM buffer 540 * size is 32K too. So if now the received data size of the stage 0 541 * IRAM buffer is less than 32K, that means we have some available 542 * spaces for the stage 0 IRAM buffer. 543 */ 544 if (stream->received_stage0 < runtime->fragment_size) { 545 avail_bytes = runtime->fragment_size - stream->received_stage0; 546 dst = stream->iram_buffer.area + stream->received_stage0; 547 548 if (avail_bytes >= data_count) { 549 /* 550 * Copy data to the stage 0 IRAM buffer directly if 551 * spaces are enough. 552 */ 553 if (copy_from_user(dst, buf, data_count)) 554 return -EFAULT; 555 556 stream->received_stage0 += data_count; 557 stream->copied_total += data_count; 558 goto copy_done; 559 } else { 560 /* 561 * If the data count is larger than the available spaces 562 * of the stage 0 IRAM buffer, we should copy one 563 * partial data to the stage 0 IRAM buffer, and copy 564 * the left to the stage 1 DDR buffer. 565 */ 566 if (copy_from_user(dst, buf, avail_bytes)) 567 return -EFAULT; 568 569 data_count -= avail_bytes; 570 stream->received_stage0 += avail_bytes; 571 stream->copied_total += avail_bytes; 572 buf += avail_bytes; 573 } 574 } 575 576 /* 577 * Copy data to the stage 1 DDR buffer if no spaces for the stage 0 IRAM 578 * buffer. 579 */ 580 dst = stream->compr_buffer.area + stream->stage1_pointer; 581 if (data_count < stream->compr_buffer.bytes - stream->stage1_pointer) { 582 if (copy_from_user(dst, buf, data_count)) 583 return -EFAULT; 584 585 stream->stage1_pointer += data_count; 586 } else { 587 avail_bytes = stream->compr_buffer.bytes - stream->stage1_pointer; 588 589 if (copy_from_user(dst, buf, avail_bytes)) 590 return -EFAULT; 591 592 if (copy_from_user(stream->compr_buffer.area, buf + avail_bytes, 593 data_count - avail_bytes)) 594 return -EFAULT; 595 596 stream->stage1_pointer = data_count - avail_bytes; 597 } 598 599 stream->received_stage1 += data_count; 600 601 copy_done: 602 /* Update the copied data size. */ 603 stream->received_total += count; 604 return count; 605 } 606 607 static int sprd_platform_compr_get_caps(struct snd_soc_component *component, 608 struct snd_compr_stream *cstream, 609 struct snd_compr_caps *caps) 610 { 611 caps->direction = cstream->direction; 612 caps->min_fragment_size = SPRD_COMPR_MIN_FRAGMENT_SIZE; 613 caps->max_fragment_size = SPRD_COMPR_MAX_FRAGMENT_SIZE; 614 caps->min_fragments = SPRD_COMPR_MIN_NUM_FRAGMENTS; 615 caps->max_fragments = SPRD_COMPR_MAX_NUM_FRAGMENTS; 616 caps->num_codecs = 2; 617 caps->codecs[0] = SND_AUDIOCODEC_MP3; 618 caps->codecs[1] = SND_AUDIOCODEC_AAC; 619 620 return 0; 621 } 622 623 static int 624 sprd_platform_compr_get_codec_caps(struct snd_soc_component *component, 625 struct snd_compr_stream *cstream, 626 struct snd_compr_codec_caps *codec) 627 { 628 switch (codec->codec) { 629 case SND_AUDIOCODEC_MP3: 630 codec->num_descriptors = 2; 631 codec->descriptor[0].max_ch = 2; 632 codec->descriptor[0].bit_rate[0] = 320; 633 codec->descriptor[0].bit_rate[1] = 128; 634 codec->descriptor[0].num_bitrates = 2; 635 codec->descriptor[0].profiles = 0; 636 codec->descriptor[0].modes = SND_AUDIOCHANMODE_MP3_STEREO; 637 codec->descriptor[0].formats = 0; 638 break; 639 640 case SND_AUDIOCODEC_AAC: 641 codec->num_descriptors = 2; 642 codec->descriptor[1].max_ch = 2; 643 codec->descriptor[1].bit_rate[0] = 320; 644 codec->descriptor[1].bit_rate[1] = 128; 645 codec->descriptor[1].num_bitrates = 2; 646 codec->descriptor[1].profiles = 0; 647 codec->descriptor[1].modes = 0; 648 codec->descriptor[1].formats = 0; 649 break; 650 651 default: 652 return -EINVAL; 653 } 654 655 return 0; 656 } 657 658 const struct snd_compress_ops sprd_platform_compress_ops = { 659 .open = sprd_platform_compr_open, 660 .free = sprd_platform_compr_free, 661 .set_params = sprd_platform_compr_set_params, 662 .trigger = sprd_platform_compr_trigger, 663 .pointer = sprd_platform_compr_pointer, 664 .copy = sprd_platform_compr_copy, 665 .get_caps = sprd_platform_compr_get_caps, 666 .get_codec_caps = sprd_platform_compr_get_codec_caps, 667 }; 668 669 MODULE_DESCRIPTION("Spreadtrum ASoC Compress Platform Driver"); 670 MODULE_LICENSE("GPL v2"); 671 MODULE_ALIAS("platform:compress-platform"); 672