1 /* 2 * Renesas R-Car SRU/SCU/SSIU/SSI support 3 * 4 * Copyright (C) 2013 Renesas Solutions Corp. 5 * Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> 6 * 7 * Based on fsi.c 8 * Kuninori Morimoto <morimoto.kuninori@renesas.com> 9 * 10 * This program is free software; you can redistribute it and/or modify 11 * it under the terms of the GNU General Public License version 2 as 12 * published by the Free Software Foundation. 13 */ 14 15 /* 16 * Renesas R-Car sound device structure 17 * 18 * Gen1 19 * 20 * SRU : Sound Routing Unit 21 * - SRC : Sampling Rate Converter 22 * - CMD 23 * - CTU : Channel Count Conversion Unit 24 * - MIX : Mixer 25 * - DVC : Digital Volume and Mute Function 26 * - SSI : Serial Sound Interface 27 * 28 * Gen2 29 * 30 * SCU : Sampling Rate Converter Unit 31 * - SRC : Sampling Rate Converter 32 * - CMD 33 * - CTU : Channel Count Conversion Unit 34 * - MIX : Mixer 35 * - DVC : Digital Volume and Mute Function 36 * SSIU : Serial Sound Interface Unit 37 * - SSI : Serial Sound Interface 38 */ 39 40 /* 41 * driver data Image 42 * 43 * rsnd_priv 44 * | 45 * | ** this depends on Gen1/Gen2 46 * | 47 * +- gen 48 * | 49 * | ** these depend on data path 50 * | ** gen and platform data control it 51 * | 52 * +- rdai[0] 53 * | | sru ssiu ssi 54 * | +- playback -> [mod] -> [mod] -> [mod] -> ... 55 * | | 56 * | | sru ssiu ssi 57 * | +- capture -> [mod] -> [mod] -> [mod] -> ... 58 * | 59 * +- rdai[1] 60 * | | sru ssiu ssi 61 * | +- playback -> [mod] -> [mod] -> [mod] -> ... 62 * | | 63 * | | sru ssiu ssi 64 * | +- capture -> [mod] -> [mod] -> [mod] -> ... 65 * ... 66 * | 67 * | ** these control ssi 68 * | 69 * +- ssi 70 * | | 71 * | +- ssi[0] 72 * | +- ssi[1] 73 * | +- ssi[2] 74 * | ... 75 * | 76 * | ** these control src 77 * | 78 * +- src 79 * | 80 * +- src[0] 81 * +- src[1] 82 * +- src[2] 83 * ... 84 * 85 * 86 * for_each_rsnd_dai(xx, priv, xx) 87 * rdai[0] => rdai[1] => rdai[2] => ... 88 * 89 * for_each_rsnd_mod(xx, rdai, xx) 90 * [mod] => [mod] => [mod] => ... 91 * 92 * rsnd_dai_call(xxx, fn ) 93 * [mod]->fn() -> [mod]->fn() -> [mod]->fn()... 94 * 95 */ 96 #include <linux/pm_runtime.h> 97 #include <linux/shdma-base.h> 98 #include "rsnd.h" 99 100 #define RSND_RATES SNDRV_PCM_RATE_8000_96000 101 #define RSND_FMTS (SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S16_LE) 102 103 static struct rsnd_of_data rsnd_of_data_gen1 = { 104 .flags = RSND_GEN1, 105 }; 106 107 static struct rsnd_of_data rsnd_of_data_gen2 = { 108 .flags = RSND_GEN2, 109 }; 110 111 static struct of_device_id rsnd_of_match[] = { 112 { .compatible = "renesas,rcar_sound-gen1", .data = &rsnd_of_data_gen1 }, 113 { .compatible = "renesas,rcar_sound-gen2", .data = &rsnd_of_data_gen2 }, 114 {}, 115 }; 116 MODULE_DEVICE_TABLE(of, rsnd_of_match); 117 118 /* 119 * rsnd_platform functions 120 */ 121 #define rsnd_platform_call(priv, dai, func, param...) \ 122 (!(priv->info->func) ? 0 : \ 123 priv->info->func(param)) 124 125 #define rsnd_is_enable_path(io, name) \ 126 ((io)->info ? (io)->info->name : NULL) 127 #define rsnd_info_id(priv, io, name) \ 128 ((io)->info->name - priv->info->name##_info) 129 130 /* 131 * rsnd_mod functions 132 */ 133 char *rsnd_mod_name(struct rsnd_mod *mod) 134 { 135 if (!mod || !mod->ops) 136 return "unknown"; 137 138 return mod->ops->name; 139 } 140 141 void rsnd_mod_init(struct rsnd_priv *priv, 142 struct rsnd_mod *mod, 143 struct rsnd_mod_ops *ops, 144 enum rsnd_mod_type type, 145 int id) 146 { 147 mod->priv = priv; 148 mod->id = id; 149 mod->ops = ops; 150 mod->type = type; 151 } 152 153 /* 154 * rsnd_dma functions 155 */ 156 static void __rsnd_dma_start(struct rsnd_dma *dma); 157 static void rsnd_dma_continue(struct rsnd_dma *dma) 158 { 159 /* push next A or B plane */ 160 dma->submit_loop = 1; 161 schedule_work(&dma->work); 162 } 163 164 void rsnd_dma_start(struct rsnd_dma *dma) 165 { 166 /* push both A and B plane*/ 167 dma->offset = 0; 168 dma->submit_loop = 2; 169 __rsnd_dma_start(dma); 170 } 171 172 void rsnd_dma_stop(struct rsnd_dma *dma) 173 { 174 dma->submit_loop = 0; 175 cancel_work_sync(&dma->work); 176 dmaengine_terminate_all(dma->chan); 177 } 178 179 static void rsnd_dma_complete(void *data) 180 { 181 struct rsnd_dma *dma = (struct rsnd_dma *)data; 182 struct rsnd_mod *mod = rsnd_dma_to_mod(dma); 183 struct rsnd_priv *priv = rsnd_mod_to_priv(rsnd_dma_to_mod(dma)); 184 struct rsnd_dai_stream *io = rsnd_mod_to_io(mod); 185 unsigned long flags; 186 187 rsnd_lock(priv, flags); 188 189 /* 190 * Renesas sound Gen1 needs 1 DMAC, 191 * Gen2 needs 2 DMAC. 192 * In Gen2 case, it are Audio-DMAC, and Audio-DMAC-peri-peri. 193 * But, Audio-DMAC-peri-peri doesn't have interrupt, 194 * and this driver is assuming that here. 195 * 196 * If Audio-DMAC-peri-peri has interrpt, 197 * rsnd_dai_pointer_update() will be called twice, 198 * ant it will breaks io->byte_pos 199 */ 200 if (dma->submit_loop) 201 rsnd_dma_continue(dma); 202 203 rsnd_unlock(priv, flags); 204 205 rsnd_dai_pointer_update(io, io->byte_per_period); 206 } 207 208 static void __rsnd_dma_start(struct rsnd_dma *dma) 209 { 210 struct rsnd_mod *mod = rsnd_dma_to_mod(dma); 211 struct rsnd_priv *priv = rsnd_mod_to_priv(mod); 212 struct rsnd_dai_stream *io = rsnd_mod_to_io(mod); 213 struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io); 214 struct device *dev = rsnd_priv_to_dev(priv); 215 struct dma_async_tx_descriptor *desc; 216 dma_addr_t buf; 217 size_t len = io->byte_per_period; 218 int i; 219 220 for (i = 0; i < dma->submit_loop; i++) { 221 222 buf = runtime->dma_addr + 223 rsnd_dai_pointer_offset(io, dma->offset + len); 224 dma->offset = len; 225 226 desc = dmaengine_prep_slave_single( 227 dma->chan, buf, len, dma->dir, 228 DMA_PREP_INTERRUPT | DMA_CTRL_ACK); 229 if (!desc) { 230 dev_err(dev, "dmaengine_prep_slave_sg() fail\n"); 231 return; 232 } 233 234 desc->callback = rsnd_dma_complete; 235 desc->callback_param = dma; 236 237 if (dmaengine_submit(desc) < 0) { 238 dev_err(dev, "dmaengine_submit() fail\n"); 239 return; 240 } 241 242 dma_async_issue_pending(dma->chan); 243 } 244 } 245 246 static void rsnd_dma_do_work(struct work_struct *work) 247 { 248 struct rsnd_dma *dma = container_of(work, struct rsnd_dma, work); 249 250 __rsnd_dma_start(dma); 251 } 252 253 int rsnd_dma_available(struct rsnd_dma *dma) 254 { 255 return !!dma->chan; 256 } 257 258 #define DMA_NAME_SIZE 16 259 #define MOD_MAX 4 /* MEM/SSI/SRC/DVC */ 260 static int _rsnd_dma_of_name(char *dma_name, struct rsnd_mod *mod) 261 { 262 if (mod) 263 return snprintf(dma_name, DMA_NAME_SIZE / 2, "%s%d", 264 rsnd_mod_name(mod), rsnd_mod_id(mod)); 265 else 266 return snprintf(dma_name, DMA_NAME_SIZE / 2, "mem"); 267 268 } 269 270 static void rsnd_dma_of_name(struct rsnd_dma *dma, 271 int is_play, char *dma_name) 272 { 273 struct rsnd_mod *this = rsnd_dma_to_mod(dma); 274 struct rsnd_dai_stream *io = rsnd_mod_to_io(this); 275 struct rsnd_mod *ssi = rsnd_io_to_mod_ssi(io); 276 struct rsnd_mod *src = rsnd_io_to_mod_src(io); 277 struct rsnd_mod *dvc = rsnd_io_to_mod_dvc(io); 278 struct rsnd_mod *mod[MOD_MAX]; 279 struct rsnd_mod *src_mod, *dst_mod; 280 int i, index; 281 282 283 for (i = 0; i < MOD_MAX; i++) 284 mod[i] = NULL; 285 286 /* 287 * in play case... 288 * 289 * src -> dst 290 * 291 * mem -> SSI 292 * mem -> SRC -> SSI 293 * mem -> SRC -> DVC -> SSI 294 */ 295 mod[0] = NULL; /* for "mem" */ 296 index = 1; 297 for (i = 1; i < MOD_MAX; i++) { 298 if (!src) { 299 mod[i] = ssi; 300 break; 301 } else if (!dvc) { 302 mod[i] = src; 303 src = NULL; 304 } else { 305 mod[i] = dvc; 306 dvc = NULL; 307 } 308 309 if (mod[i] == this) 310 index = i; 311 } 312 313 if (is_play) { 314 src_mod = mod[index - 1]; 315 dst_mod = mod[index]; 316 } else { 317 src_mod = mod[index]; 318 dst_mod = mod[index - 1]; 319 } 320 321 index = 0; 322 index = _rsnd_dma_of_name(dma_name + index, src_mod); 323 *(dma_name + index++) = '_'; 324 index = _rsnd_dma_of_name(dma_name + index, dst_mod); 325 } 326 327 int rsnd_dma_init(struct rsnd_priv *priv, struct rsnd_dma *dma, 328 int is_play, int id) 329 { 330 struct device *dev = rsnd_priv_to_dev(priv); 331 struct dma_slave_config cfg; 332 char dma_name[DMA_NAME_SIZE]; 333 dma_cap_mask_t mask; 334 int ret; 335 336 if (dma->chan) { 337 dev_err(dev, "it already has dma channel\n"); 338 return -EIO; 339 } 340 341 dma_cap_zero(mask); 342 dma_cap_set(DMA_SLAVE, mask); 343 344 if (dev->of_node) 345 rsnd_dma_of_name(dma, is_play, dma_name); 346 else 347 snprintf(dma_name, DMA_NAME_SIZE, 348 is_play ? "tx" : "rx"); 349 350 dev_dbg(dev, "dma name : %s\n", dma_name); 351 352 dma->chan = dma_request_slave_channel_compat(mask, shdma_chan_filter, 353 (void *)id, dev, 354 dma_name); 355 if (!dma->chan) { 356 dev_err(dev, "can't get dma channel\n"); 357 return -EIO; 358 } 359 360 rsnd_gen_dma_addr(priv, dma, &cfg, is_play, id); 361 362 ret = dmaengine_slave_config(dma->chan, &cfg); 363 if (ret < 0) 364 goto rsnd_dma_init_err; 365 366 dma->dir = is_play ? DMA_TO_DEVICE : DMA_FROM_DEVICE; 367 INIT_WORK(&dma->work, rsnd_dma_do_work); 368 369 return 0; 370 371 rsnd_dma_init_err: 372 rsnd_dma_quit(priv, dma); 373 374 return ret; 375 } 376 377 void rsnd_dma_quit(struct rsnd_priv *priv, 378 struct rsnd_dma *dma) 379 { 380 if (dma->chan) 381 dma_release_channel(dma->chan); 382 383 dma->chan = NULL; 384 } 385 386 /* 387 * settting function 388 */ 389 u32 rsnd_get_adinr(struct rsnd_mod *mod) 390 { 391 struct rsnd_priv *priv = rsnd_mod_to_priv(mod); 392 struct rsnd_dai_stream *io = rsnd_mod_to_io(mod); 393 struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io); 394 struct device *dev = rsnd_priv_to_dev(priv); 395 u32 adinr = runtime->channels; 396 397 switch (runtime->sample_bits) { 398 case 16: 399 adinr |= (8 << 16); 400 break; 401 case 32: 402 adinr |= (0 << 16); 403 break; 404 default: 405 dev_warn(dev, "not supported sample bits\n"); 406 return 0; 407 } 408 409 return adinr; 410 } 411 412 /* 413 * rsnd_dai functions 414 */ 415 #define __rsnd_mod_call(mod, func, rdai...) \ 416 ({ \ 417 struct rsnd_priv *priv = rsnd_mod_to_priv(mod); \ 418 struct device *dev = rsnd_priv_to_dev(priv); \ 419 dev_dbg(dev, "%s [%d] %s\n", \ 420 rsnd_mod_name(mod), rsnd_mod_id(mod), #func); \ 421 (mod)->ops->func(mod, rdai); \ 422 }) 423 424 #define rsnd_mod_call(mod, func, rdai...) \ 425 (!(mod) ? -ENODEV : \ 426 !((mod)->ops->func) ? 0 : \ 427 __rsnd_mod_call(mod, func, rdai)) 428 429 #define rsnd_dai_call(fn, io, rdai...) \ 430 ({ \ 431 struct rsnd_mod *mod; \ 432 int ret = 0, i; \ 433 for (i = 0; i < RSND_MOD_MAX; i++) { \ 434 mod = (io)->mod[i]; \ 435 if (!mod) \ 436 continue; \ 437 ret = rsnd_mod_call(mod, fn, rdai); \ 438 if (ret < 0) \ 439 break; \ 440 } \ 441 ret; \ 442 }) 443 444 static int rsnd_dai_connect(struct rsnd_mod *mod, 445 struct rsnd_dai_stream *io) 446 { 447 if (!mod) 448 return -EIO; 449 450 if (io->mod[mod->type]) { 451 struct rsnd_priv *priv = rsnd_mod_to_priv(mod); 452 struct device *dev = rsnd_priv_to_dev(priv); 453 454 dev_err(dev, "%s%d is not empty\n", 455 rsnd_mod_name(mod), 456 rsnd_mod_id(mod)); 457 return -EIO; 458 } 459 460 io->mod[mod->type] = mod; 461 mod->io = io; 462 463 return 0; 464 } 465 466 int rsnd_dai_id(struct rsnd_priv *priv, struct rsnd_dai *rdai) 467 { 468 int id = rdai - priv->rdai; 469 470 if ((id < 0) || (id >= rsnd_rdai_nr(priv))) 471 return -EINVAL; 472 473 return id; 474 } 475 476 struct rsnd_dai *rsnd_dai_get(struct rsnd_priv *priv, int id) 477 { 478 if ((id < 0) || (id >= rsnd_rdai_nr(priv))) 479 return NULL; 480 481 return priv->rdai + id; 482 } 483 484 static struct rsnd_dai *rsnd_dai_to_rdai(struct snd_soc_dai *dai) 485 { 486 struct rsnd_priv *priv = snd_soc_dai_get_drvdata(dai); 487 488 return rsnd_dai_get(priv, dai->id); 489 } 490 491 int rsnd_dai_is_play(struct rsnd_dai *rdai, struct rsnd_dai_stream *io) 492 { 493 return &rdai->playback == io; 494 } 495 496 /* 497 * rsnd_soc_dai functions 498 */ 499 int rsnd_dai_pointer_offset(struct rsnd_dai_stream *io, int additional) 500 { 501 struct snd_pcm_substream *substream = io->substream; 502 struct snd_pcm_runtime *runtime = substream->runtime; 503 int pos = io->byte_pos + additional; 504 505 pos %= (runtime->periods * io->byte_per_period); 506 507 return pos; 508 } 509 510 void rsnd_dai_pointer_update(struct rsnd_dai_stream *io, int byte) 511 { 512 io->byte_pos += byte; 513 514 if (io->byte_pos >= io->next_period_byte) { 515 struct snd_pcm_substream *substream = io->substream; 516 struct snd_pcm_runtime *runtime = substream->runtime; 517 518 io->period_pos++; 519 io->next_period_byte += io->byte_per_period; 520 521 if (io->period_pos >= runtime->periods) { 522 io->byte_pos = 0; 523 io->period_pos = 0; 524 io->next_period_byte = io->byte_per_period; 525 } 526 527 snd_pcm_period_elapsed(substream); 528 } 529 } 530 531 static int rsnd_dai_stream_init(struct rsnd_dai_stream *io, 532 struct snd_pcm_substream *substream) 533 { 534 struct snd_pcm_runtime *runtime = substream->runtime; 535 536 io->substream = substream; 537 io->byte_pos = 0; 538 io->period_pos = 0; 539 io->byte_per_period = runtime->period_size * 540 runtime->channels * 541 samples_to_bytes(runtime, 1); 542 io->next_period_byte = io->byte_per_period; 543 544 return 0; 545 } 546 547 static 548 struct snd_soc_dai *rsnd_substream_to_dai(struct snd_pcm_substream *substream) 549 { 550 struct snd_soc_pcm_runtime *rtd = substream->private_data; 551 552 return rtd->cpu_dai; 553 } 554 555 static 556 struct rsnd_dai_stream *rsnd_rdai_to_io(struct rsnd_dai *rdai, 557 struct snd_pcm_substream *substream) 558 { 559 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 560 return &rdai->playback; 561 else 562 return &rdai->capture; 563 } 564 565 static int rsnd_soc_dai_trigger(struct snd_pcm_substream *substream, int cmd, 566 struct snd_soc_dai *dai) 567 { 568 struct rsnd_priv *priv = snd_soc_dai_get_drvdata(dai); 569 struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai); 570 struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream); 571 int ssi_id = rsnd_mod_id(rsnd_io_to_mod_ssi(io)); 572 int ret; 573 unsigned long flags; 574 575 rsnd_lock(priv, flags); 576 577 switch (cmd) { 578 case SNDRV_PCM_TRIGGER_START: 579 ret = rsnd_dai_stream_init(io, substream); 580 if (ret < 0) 581 goto dai_trigger_end; 582 583 ret = rsnd_platform_call(priv, dai, start, ssi_id); 584 if (ret < 0) 585 goto dai_trigger_end; 586 587 ret = rsnd_dai_call(init, io, rdai); 588 if (ret < 0) 589 goto dai_trigger_end; 590 591 ret = rsnd_dai_call(start, io, rdai); 592 if (ret < 0) 593 goto dai_trigger_end; 594 break; 595 case SNDRV_PCM_TRIGGER_STOP: 596 ret = rsnd_dai_call(stop, io, rdai); 597 if (ret < 0) 598 goto dai_trigger_end; 599 600 ret = rsnd_dai_call(quit, io, rdai); 601 if (ret < 0) 602 goto dai_trigger_end; 603 604 ret = rsnd_platform_call(priv, dai, stop, ssi_id); 605 if (ret < 0) 606 goto dai_trigger_end; 607 break; 608 default: 609 ret = -EINVAL; 610 } 611 612 dai_trigger_end: 613 rsnd_unlock(priv, flags); 614 615 return ret; 616 } 617 618 static int rsnd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt) 619 { 620 struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai); 621 622 /* set master/slave audio interface */ 623 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { 624 case SND_SOC_DAIFMT_CBM_CFM: 625 rdai->clk_master = 0; 626 break; 627 case SND_SOC_DAIFMT_CBS_CFS: 628 rdai->clk_master = 1; /* codec is slave, cpu is master */ 629 break; 630 default: 631 return -EINVAL; 632 } 633 634 /* set clock inversion */ 635 switch (fmt & SND_SOC_DAIFMT_INV_MASK) { 636 case SND_SOC_DAIFMT_NB_IF: 637 rdai->bit_clk_inv = 0; 638 rdai->frm_clk_inv = 1; 639 break; 640 case SND_SOC_DAIFMT_IB_NF: 641 rdai->bit_clk_inv = 1; 642 rdai->frm_clk_inv = 0; 643 break; 644 case SND_SOC_DAIFMT_IB_IF: 645 rdai->bit_clk_inv = 1; 646 rdai->frm_clk_inv = 1; 647 break; 648 case SND_SOC_DAIFMT_NB_NF: 649 default: 650 rdai->bit_clk_inv = 0; 651 rdai->frm_clk_inv = 0; 652 break; 653 } 654 655 /* set format */ 656 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { 657 case SND_SOC_DAIFMT_I2S: 658 rdai->sys_delay = 0; 659 rdai->data_alignment = 0; 660 break; 661 case SND_SOC_DAIFMT_LEFT_J: 662 rdai->sys_delay = 1; 663 rdai->data_alignment = 0; 664 break; 665 case SND_SOC_DAIFMT_RIGHT_J: 666 rdai->sys_delay = 1; 667 rdai->data_alignment = 1; 668 break; 669 } 670 671 return 0; 672 } 673 674 static const struct snd_soc_dai_ops rsnd_soc_dai_ops = { 675 .trigger = rsnd_soc_dai_trigger, 676 .set_fmt = rsnd_soc_dai_set_fmt, 677 }; 678 679 #define rsnd_path_parse(priv, io, type) \ 680 ({ \ 681 struct rsnd_mod *mod; \ 682 int ret = 0; \ 683 int id = -1; \ 684 \ 685 if (rsnd_is_enable_path(io, type)) { \ 686 id = rsnd_info_id(priv, io, type); \ 687 if (id >= 0) { \ 688 mod = rsnd_##type##_mod_get(priv, id); \ 689 ret = rsnd_dai_connect(mod, io); \ 690 } \ 691 } \ 692 ret; \ 693 }) 694 695 static int rsnd_path_init(struct rsnd_priv *priv, 696 struct rsnd_dai *rdai, 697 struct rsnd_dai_stream *io) 698 { 699 int ret; 700 701 /* 702 * Gen1 is created by SRU/SSI, and this SRU is base module of 703 * Gen2's SCU/SSIU/SSI. (Gen2 SCU/SSIU came from SRU) 704 * 705 * Easy image is.. 706 * Gen1 SRU = Gen2 SCU + SSIU + etc 707 * 708 * Gen2 SCU path is very flexible, but, Gen1 SRU (SCU parts) is 709 * using fixed path. 710 */ 711 712 /* SRC */ 713 ret = rsnd_path_parse(priv, io, src); 714 if (ret < 0) 715 return ret; 716 717 /* SSI */ 718 ret = rsnd_path_parse(priv, io, ssi); 719 if (ret < 0) 720 return ret; 721 722 /* DVC */ 723 ret = rsnd_path_parse(priv, io, dvc); 724 if (ret < 0) 725 return ret; 726 727 return ret; 728 } 729 730 static void rsnd_of_parse_dai(struct platform_device *pdev, 731 const struct rsnd_of_data *of_data, 732 struct rsnd_priv *priv) 733 { 734 struct device_node *dai_node, *dai_np; 735 struct device_node *ssi_node, *ssi_np; 736 struct device_node *src_node, *src_np; 737 struct device_node *playback, *capture; 738 struct rsnd_dai_platform_info *dai_info; 739 struct rcar_snd_info *info = rsnd_priv_to_info(priv); 740 struct device *dev = &pdev->dev; 741 int nr, i; 742 int dai_i, ssi_i, src_i; 743 744 if (!of_data) 745 return; 746 747 dai_node = of_get_child_by_name(dev->of_node, "rcar_sound,dai"); 748 if (!dai_node) 749 return; 750 751 nr = of_get_child_count(dai_node); 752 if (!nr) 753 return; 754 755 dai_info = devm_kzalloc(dev, 756 sizeof(struct rsnd_dai_platform_info) * nr, 757 GFP_KERNEL); 758 if (!dai_info) { 759 dev_err(dev, "dai info allocation error\n"); 760 return; 761 } 762 763 info->dai_info_nr = nr; 764 info->dai_info = dai_info; 765 766 ssi_node = of_get_child_by_name(dev->of_node, "rcar_sound,ssi"); 767 src_node = of_get_child_by_name(dev->of_node, "rcar_sound,src"); 768 769 #define mod_parse(name) \ 770 if (name##_node) { \ 771 struct rsnd_##name##_platform_info *name##_info; \ 772 \ 773 name##_i = 0; \ 774 for_each_child_of_node(name##_node, name##_np) { \ 775 name##_info = info->name##_info + name##_i; \ 776 \ 777 if (name##_np == playback) \ 778 dai_info->playback.name = name##_info; \ 779 if (name##_np == capture) \ 780 dai_info->capture.name = name##_info; \ 781 \ 782 name##_i++; \ 783 } \ 784 } 785 786 /* 787 * parse all dai 788 */ 789 dai_i = 0; 790 for_each_child_of_node(dai_node, dai_np) { 791 dai_info = info->dai_info + dai_i; 792 793 for (i = 0;; i++) { 794 795 playback = of_parse_phandle(dai_np, "playback", i); 796 capture = of_parse_phandle(dai_np, "capture", i); 797 798 if (!playback && !capture) 799 break; 800 801 mod_parse(ssi); 802 mod_parse(src); 803 804 if (playback) 805 of_node_put(playback); 806 if (capture) 807 of_node_put(capture); 808 } 809 810 dai_i++; 811 } 812 } 813 814 static int rsnd_dai_probe(struct platform_device *pdev, 815 const struct rsnd_of_data *of_data, 816 struct rsnd_priv *priv) 817 { 818 struct snd_soc_dai_driver *drv; 819 struct rcar_snd_info *info = rsnd_priv_to_info(priv); 820 struct rsnd_dai *rdai; 821 struct rsnd_ssi_platform_info *pmod, *cmod; 822 struct device *dev = rsnd_priv_to_dev(priv); 823 int dai_nr; 824 int i; 825 826 rsnd_of_parse_dai(pdev, of_data, priv); 827 828 dai_nr = info->dai_info_nr; 829 if (!dai_nr) { 830 dev_err(dev, "no dai\n"); 831 return -EIO; 832 } 833 834 drv = devm_kzalloc(dev, sizeof(*drv) * dai_nr, GFP_KERNEL); 835 rdai = devm_kzalloc(dev, sizeof(*rdai) * dai_nr, GFP_KERNEL); 836 if (!drv || !rdai) { 837 dev_err(dev, "dai allocate failed\n"); 838 return -ENOMEM; 839 } 840 841 priv->rdai_nr = dai_nr; 842 priv->daidrv = drv; 843 priv->rdai = rdai; 844 845 for (i = 0; i < dai_nr; i++) { 846 rdai[i].info = &info->dai_info[i]; 847 848 pmod = rdai[i].info->playback.ssi; 849 cmod = rdai[i].info->capture.ssi; 850 851 /* 852 * init rsnd_dai 853 */ 854 snprintf(rdai[i].name, RSND_DAI_NAME_SIZE, "rsnd-dai.%d", i); 855 856 /* 857 * init snd_soc_dai_driver 858 */ 859 drv[i].name = rdai[i].name; 860 drv[i].ops = &rsnd_soc_dai_ops; 861 if (pmod) { 862 drv[i].playback.rates = RSND_RATES; 863 drv[i].playback.formats = RSND_FMTS; 864 drv[i].playback.channels_min = 2; 865 drv[i].playback.channels_max = 2; 866 867 rdai[i].playback.info = &info->dai_info[i].playback; 868 rsnd_path_init(priv, &rdai[i], &rdai[i].playback); 869 } 870 if (cmod) { 871 drv[i].capture.rates = RSND_RATES; 872 drv[i].capture.formats = RSND_FMTS; 873 drv[i].capture.channels_min = 2; 874 drv[i].capture.channels_max = 2; 875 876 rdai[i].capture.info = &info->dai_info[i].capture; 877 rsnd_path_init(priv, &rdai[i], &rdai[i].capture); 878 } 879 880 dev_dbg(dev, "%s (%s/%s)\n", rdai[i].name, 881 pmod ? "play" : " -- ", 882 cmod ? "capture" : " -- "); 883 } 884 885 return 0; 886 } 887 888 /* 889 * pcm ops 890 */ 891 static struct snd_pcm_hardware rsnd_pcm_hardware = { 892 .info = SNDRV_PCM_INFO_INTERLEAVED | 893 SNDRV_PCM_INFO_MMAP | 894 SNDRV_PCM_INFO_MMAP_VALID | 895 SNDRV_PCM_INFO_PAUSE, 896 .buffer_bytes_max = 64 * 1024, 897 .period_bytes_min = 32, 898 .period_bytes_max = 8192, 899 .periods_min = 1, 900 .periods_max = 32, 901 .fifo_size = 256, 902 }; 903 904 static int rsnd_pcm_open(struct snd_pcm_substream *substream) 905 { 906 struct snd_pcm_runtime *runtime = substream->runtime; 907 int ret = 0; 908 909 snd_soc_set_runtime_hwparams(substream, &rsnd_pcm_hardware); 910 911 ret = snd_pcm_hw_constraint_integer(runtime, 912 SNDRV_PCM_HW_PARAM_PERIODS); 913 914 return ret; 915 } 916 917 static int rsnd_hw_params(struct snd_pcm_substream *substream, 918 struct snd_pcm_hw_params *hw_params) 919 { 920 return snd_pcm_lib_malloc_pages(substream, 921 params_buffer_bytes(hw_params)); 922 } 923 924 static snd_pcm_uframes_t rsnd_pointer(struct snd_pcm_substream *substream) 925 { 926 struct snd_pcm_runtime *runtime = substream->runtime; 927 struct snd_soc_dai *dai = rsnd_substream_to_dai(substream); 928 struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai); 929 struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream); 930 931 return bytes_to_frames(runtime, io->byte_pos); 932 } 933 934 static struct snd_pcm_ops rsnd_pcm_ops = { 935 .open = rsnd_pcm_open, 936 .ioctl = snd_pcm_lib_ioctl, 937 .hw_params = rsnd_hw_params, 938 .hw_free = snd_pcm_lib_free_pages, 939 .pointer = rsnd_pointer, 940 }; 941 942 /* 943 * snd_soc_platform 944 */ 945 946 #define PREALLOC_BUFFER (32 * 1024) 947 #define PREALLOC_BUFFER_MAX (32 * 1024) 948 949 static int rsnd_pcm_new(struct snd_soc_pcm_runtime *rtd) 950 { 951 struct rsnd_priv *priv = snd_soc_dai_get_drvdata(rtd->cpu_dai); 952 struct rsnd_dai *rdai; 953 int i, ret; 954 955 for_each_rsnd_dai(rdai, priv, i) { 956 ret = rsnd_dai_call(pcm_new, &rdai->playback, rdai, rtd); 957 if (ret) 958 return ret; 959 960 ret = rsnd_dai_call(pcm_new, &rdai->capture, rdai, rtd); 961 if (ret) 962 return ret; 963 } 964 965 return snd_pcm_lib_preallocate_pages_for_all( 966 rtd->pcm, 967 SNDRV_DMA_TYPE_DEV, 968 rtd->card->snd_card->dev, 969 PREALLOC_BUFFER, PREALLOC_BUFFER_MAX); 970 } 971 972 static void rsnd_pcm_free(struct snd_pcm *pcm) 973 { 974 snd_pcm_lib_preallocate_free_for_all(pcm); 975 } 976 977 static struct snd_soc_platform_driver rsnd_soc_platform = { 978 .ops = &rsnd_pcm_ops, 979 .pcm_new = rsnd_pcm_new, 980 .pcm_free = rsnd_pcm_free, 981 }; 982 983 static const struct snd_soc_component_driver rsnd_soc_component = { 984 .name = "rsnd", 985 }; 986 987 /* 988 * rsnd probe 989 */ 990 static int rsnd_probe(struct platform_device *pdev) 991 { 992 struct rcar_snd_info *info; 993 struct rsnd_priv *priv; 994 struct device *dev = &pdev->dev; 995 struct rsnd_dai *rdai; 996 const struct of_device_id *of_id = of_match_device(rsnd_of_match, dev); 997 const struct rsnd_of_data *of_data; 998 int (*probe_func[])(struct platform_device *pdev, 999 const struct rsnd_of_data *of_data, 1000 struct rsnd_priv *priv) = { 1001 rsnd_gen_probe, 1002 rsnd_ssi_probe, 1003 rsnd_src_probe, 1004 rsnd_dvc_probe, 1005 rsnd_adg_probe, 1006 rsnd_dai_probe, 1007 }; 1008 int ret, i; 1009 1010 info = NULL; 1011 of_data = NULL; 1012 if (of_id) { 1013 info = devm_kzalloc(&pdev->dev, 1014 sizeof(struct rcar_snd_info), GFP_KERNEL); 1015 of_data = of_id->data; 1016 } else { 1017 info = pdev->dev.platform_data; 1018 } 1019 1020 if (!info) { 1021 dev_err(dev, "driver needs R-Car sound information\n"); 1022 return -ENODEV; 1023 } 1024 1025 /* 1026 * init priv data 1027 */ 1028 priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); 1029 if (!priv) { 1030 dev_err(dev, "priv allocate failed\n"); 1031 return -ENODEV; 1032 } 1033 1034 priv->pdev = pdev; 1035 priv->info = info; 1036 spin_lock_init(&priv->lock); 1037 1038 /* 1039 * init each module 1040 */ 1041 for (i = 0; i < ARRAY_SIZE(probe_func); i++) { 1042 ret = probe_func[i](pdev, of_data, priv); 1043 if (ret) 1044 return ret; 1045 } 1046 1047 for_each_rsnd_dai(rdai, priv, i) { 1048 ret = rsnd_dai_call(probe, &rdai->playback, rdai); 1049 if (ret) 1050 return ret; 1051 1052 ret = rsnd_dai_call(probe, &rdai->capture, rdai); 1053 if (ret) 1054 return ret; 1055 } 1056 1057 /* 1058 * asoc register 1059 */ 1060 ret = snd_soc_register_platform(dev, &rsnd_soc_platform); 1061 if (ret < 0) { 1062 dev_err(dev, "cannot snd soc register\n"); 1063 return ret; 1064 } 1065 1066 ret = snd_soc_register_component(dev, &rsnd_soc_component, 1067 priv->daidrv, rsnd_rdai_nr(priv)); 1068 if (ret < 0) { 1069 dev_err(dev, "cannot snd dai register\n"); 1070 goto exit_snd_soc; 1071 } 1072 1073 dev_set_drvdata(dev, priv); 1074 1075 pm_runtime_enable(dev); 1076 1077 dev_info(dev, "probed\n"); 1078 return ret; 1079 1080 exit_snd_soc: 1081 snd_soc_unregister_platform(dev); 1082 1083 return ret; 1084 } 1085 1086 static int rsnd_remove(struct platform_device *pdev) 1087 { 1088 struct rsnd_priv *priv = dev_get_drvdata(&pdev->dev); 1089 struct rsnd_dai *rdai; 1090 int ret, i; 1091 1092 pm_runtime_disable(&pdev->dev); 1093 1094 for_each_rsnd_dai(rdai, priv, i) { 1095 ret = rsnd_dai_call(remove, &rdai->playback, rdai); 1096 if (ret) 1097 return ret; 1098 1099 ret = rsnd_dai_call(remove, &rdai->capture, rdai); 1100 if (ret) 1101 return ret; 1102 } 1103 1104 return 0; 1105 } 1106 1107 static struct platform_driver rsnd_driver = { 1108 .driver = { 1109 .name = "rcar_sound", 1110 .of_match_table = rsnd_of_match, 1111 }, 1112 .probe = rsnd_probe, 1113 .remove = rsnd_remove, 1114 }; 1115 module_platform_driver(rsnd_driver); 1116 1117 MODULE_LICENSE("GPL"); 1118 MODULE_DESCRIPTION("Renesas R-Car audio driver"); 1119 MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>"); 1120 MODULE_ALIAS("platform:rcar-pcm-audio"); 1121