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 */ 200 201 rsnd_dai_pointer_update(io, io->byte_per_period); 202 203 if (dma->submit_loop) 204 rsnd_dma_continue(dma); 205 206 rsnd_unlock(priv, flags); 207 } 208 209 static void __rsnd_dma_start(struct rsnd_dma *dma) 210 { 211 struct rsnd_mod *mod = rsnd_dma_to_mod(dma); 212 struct rsnd_priv *priv = rsnd_mod_to_priv(mod); 213 struct rsnd_dai_stream *io = rsnd_mod_to_io(mod); 214 struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io); 215 struct device *dev = rsnd_priv_to_dev(priv); 216 struct dma_async_tx_descriptor *desc; 217 dma_addr_t buf; 218 size_t len = io->byte_per_period; 219 int i; 220 221 for (i = 0; i < dma->submit_loop; i++) { 222 223 buf = runtime->dma_addr + 224 rsnd_dai_pointer_offset(io, dma->offset + len); 225 dma->offset = len; 226 227 desc = dmaengine_prep_slave_single( 228 dma->chan, buf, len, dma->dir, 229 DMA_PREP_INTERRUPT | DMA_CTRL_ACK); 230 if (!desc) { 231 dev_err(dev, "dmaengine_prep_slave_sg() fail\n"); 232 return; 233 } 234 235 desc->callback = rsnd_dma_complete; 236 desc->callback_param = dma; 237 238 if (dmaengine_submit(desc) < 0) { 239 dev_err(dev, "dmaengine_submit() fail\n"); 240 return; 241 } 242 243 dma_async_issue_pending(dma->chan); 244 } 245 } 246 247 static void rsnd_dma_do_work(struct work_struct *work) 248 { 249 struct rsnd_dma *dma = container_of(work, struct rsnd_dma, work); 250 251 __rsnd_dma_start(dma); 252 } 253 254 int rsnd_dma_available(struct rsnd_dma *dma) 255 { 256 return !!dma->chan; 257 } 258 259 int rsnd_dma_init(struct rsnd_priv *priv, struct rsnd_dma *dma, 260 int is_play, int id) 261 { 262 struct device *dev = rsnd_priv_to_dev(priv); 263 struct dma_slave_config cfg; 264 dma_cap_mask_t mask; 265 int ret; 266 267 if (dma->chan) { 268 dev_err(dev, "it already has dma channel\n"); 269 return -EIO; 270 } 271 272 dma_cap_zero(mask); 273 dma_cap_set(DMA_SLAVE, mask); 274 275 dma->chan = dma_request_slave_channel_compat(mask, shdma_chan_filter, 276 (void *)id, dev, 277 is_play ? "tx" : "rx"); 278 if (!dma->chan) { 279 dev_err(dev, "can't get dma channel\n"); 280 return -EIO; 281 } 282 283 cfg.slave_id = id; 284 cfg.dst_addr = 0; /* use default addr when playback */ 285 cfg.src_addr = 0; /* use default addr when capture */ 286 cfg.direction = is_play ? DMA_MEM_TO_DEV : DMA_DEV_TO_MEM; 287 288 ret = dmaengine_slave_config(dma->chan, &cfg); 289 if (ret < 0) 290 goto rsnd_dma_init_err; 291 292 dma->dir = is_play ? DMA_TO_DEVICE : DMA_FROM_DEVICE; 293 INIT_WORK(&dma->work, rsnd_dma_do_work); 294 295 return 0; 296 297 rsnd_dma_init_err: 298 rsnd_dma_quit(priv, dma); 299 300 return ret; 301 } 302 303 void rsnd_dma_quit(struct rsnd_priv *priv, 304 struct rsnd_dma *dma) 305 { 306 if (dma->chan) 307 dma_release_channel(dma->chan); 308 309 dma->chan = NULL; 310 } 311 312 /* 313 * rsnd_dai functions 314 */ 315 #define __rsnd_mod_call(mod, func, rdai, io) \ 316 ({ \ 317 struct rsnd_priv *priv = rsnd_mod_to_priv(mod); \ 318 struct device *dev = rsnd_priv_to_dev(priv); \ 319 dev_dbg(dev, "%s [%d] %s\n", \ 320 rsnd_mod_name(mod), rsnd_mod_id(mod), #func); \ 321 (mod)->ops->func(mod, rdai, io); \ 322 }) 323 324 #define rsnd_mod_call(mod, func, rdai, io) \ 325 (!(mod) ? -ENODEV : \ 326 !((mod)->ops->func) ? 0 : \ 327 __rsnd_mod_call(mod, func, (rdai), (io))) 328 329 #define rsnd_dai_call(rdai, io, fn) \ 330 ({ \ 331 struct rsnd_mod *mod; \ 332 int ret = 0, i; \ 333 for (i = 0; i < RSND_MOD_MAX; i++) { \ 334 mod = (io)->mod[i]; \ 335 if (!mod) \ 336 continue; \ 337 ret = rsnd_mod_call(mod, fn, (rdai), (io)); \ 338 if (ret < 0) \ 339 break; \ 340 } \ 341 ret; \ 342 }) 343 344 static int rsnd_dai_connect(struct rsnd_mod *mod, 345 struct rsnd_dai_stream *io) 346 { 347 if (!mod) 348 return -EIO; 349 350 if (io->mod[mod->type]) { 351 struct rsnd_priv *priv = rsnd_mod_to_priv(mod); 352 struct device *dev = rsnd_priv_to_dev(priv); 353 354 dev_err(dev, "%s%d is not empty\n", 355 rsnd_mod_name(mod), 356 rsnd_mod_id(mod)); 357 return -EIO; 358 } 359 360 io->mod[mod->type] = mod; 361 mod->io = io; 362 363 return 0; 364 } 365 366 int rsnd_dai_id(struct rsnd_priv *priv, struct rsnd_dai *rdai) 367 { 368 int id = rdai - priv->rdai; 369 370 if ((id < 0) || (id >= rsnd_rdai_nr(priv))) 371 return -EINVAL; 372 373 return id; 374 } 375 376 struct rsnd_dai *rsnd_dai_get(struct rsnd_priv *priv, int id) 377 { 378 if ((id < 0) || (id >= rsnd_rdai_nr(priv))) 379 return NULL; 380 381 return priv->rdai + id; 382 } 383 384 static struct rsnd_dai *rsnd_dai_to_rdai(struct snd_soc_dai *dai) 385 { 386 struct rsnd_priv *priv = snd_soc_dai_get_drvdata(dai); 387 388 return rsnd_dai_get(priv, dai->id); 389 } 390 391 int rsnd_dai_is_play(struct rsnd_dai *rdai, struct rsnd_dai_stream *io) 392 { 393 return &rdai->playback == io; 394 } 395 396 /* 397 * rsnd_soc_dai functions 398 */ 399 int rsnd_dai_pointer_offset(struct rsnd_dai_stream *io, int additional) 400 { 401 struct snd_pcm_substream *substream = io->substream; 402 struct snd_pcm_runtime *runtime = substream->runtime; 403 int pos = io->byte_pos + additional; 404 405 pos %= (runtime->periods * io->byte_per_period); 406 407 return pos; 408 } 409 410 void rsnd_dai_pointer_update(struct rsnd_dai_stream *io, int byte) 411 { 412 io->byte_pos += byte; 413 414 if (io->byte_pos >= io->next_period_byte) { 415 struct snd_pcm_substream *substream = io->substream; 416 struct snd_pcm_runtime *runtime = substream->runtime; 417 418 io->period_pos++; 419 io->next_period_byte += io->byte_per_period; 420 421 if (io->period_pos >= runtime->periods) { 422 io->byte_pos = 0; 423 io->period_pos = 0; 424 io->next_period_byte = io->byte_per_period; 425 } 426 427 snd_pcm_period_elapsed(substream); 428 } 429 } 430 431 static int rsnd_dai_stream_init(struct rsnd_dai_stream *io, 432 struct snd_pcm_substream *substream) 433 { 434 struct snd_pcm_runtime *runtime = substream->runtime; 435 436 io->substream = substream; 437 io->byte_pos = 0; 438 io->period_pos = 0; 439 io->byte_per_period = runtime->period_size * 440 runtime->channels * 441 samples_to_bytes(runtime, 1); 442 io->next_period_byte = io->byte_per_period; 443 444 return 0; 445 } 446 447 static 448 struct snd_soc_dai *rsnd_substream_to_dai(struct snd_pcm_substream *substream) 449 { 450 struct snd_soc_pcm_runtime *rtd = substream->private_data; 451 452 return rtd->cpu_dai; 453 } 454 455 static 456 struct rsnd_dai_stream *rsnd_rdai_to_io(struct rsnd_dai *rdai, 457 struct snd_pcm_substream *substream) 458 { 459 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 460 return &rdai->playback; 461 else 462 return &rdai->capture; 463 } 464 465 static int rsnd_soc_dai_trigger(struct snd_pcm_substream *substream, int cmd, 466 struct snd_soc_dai *dai) 467 { 468 struct rsnd_priv *priv = snd_soc_dai_get_drvdata(dai); 469 struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai); 470 struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream); 471 struct rsnd_mod *mod = rsnd_ssi_mod_get_frm_dai(priv, 472 rsnd_dai_id(priv, rdai), 473 rsnd_dai_is_play(rdai, io)); 474 int ssi_id = rsnd_mod_id(mod); 475 int ret; 476 unsigned long flags; 477 478 rsnd_lock(priv, flags); 479 480 switch (cmd) { 481 case SNDRV_PCM_TRIGGER_START: 482 ret = rsnd_dai_stream_init(io, substream); 483 if (ret < 0) 484 goto dai_trigger_end; 485 486 ret = rsnd_platform_call(priv, dai, start, ssi_id); 487 if (ret < 0) 488 goto dai_trigger_end; 489 490 ret = rsnd_dai_call(rdai, io, init); 491 if (ret < 0) 492 goto dai_trigger_end; 493 494 ret = rsnd_dai_call(rdai, io, start); 495 if (ret < 0) 496 goto dai_trigger_end; 497 break; 498 case SNDRV_PCM_TRIGGER_STOP: 499 ret = rsnd_dai_call(rdai, io, stop); 500 if (ret < 0) 501 goto dai_trigger_end; 502 503 ret = rsnd_dai_call(rdai, io, quit); 504 if (ret < 0) 505 goto dai_trigger_end; 506 507 ret = rsnd_platform_call(priv, dai, stop, ssi_id); 508 if (ret < 0) 509 goto dai_trigger_end; 510 break; 511 default: 512 ret = -EINVAL; 513 } 514 515 dai_trigger_end: 516 rsnd_unlock(priv, flags); 517 518 return ret; 519 } 520 521 static int rsnd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt) 522 { 523 struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai); 524 525 /* set master/slave audio interface */ 526 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { 527 case SND_SOC_DAIFMT_CBM_CFM: 528 rdai->clk_master = 0; 529 break; 530 case SND_SOC_DAIFMT_CBS_CFS: 531 rdai->clk_master = 1; /* codec is slave, cpu is master */ 532 break; 533 default: 534 return -EINVAL; 535 } 536 537 /* set clock inversion */ 538 switch (fmt & SND_SOC_DAIFMT_INV_MASK) { 539 case SND_SOC_DAIFMT_NB_IF: 540 rdai->bit_clk_inv = 0; 541 rdai->frm_clk_inv = 1; 542 break; 543 case SND_SOC_DAIFMT_IB_NF: 544 rdai->bit_clk_inv = 1; 545 rdai->frm_clk_inv = 0; 546 break; 547 case SND_SOC_DAIFMT_IB_IF: 548 rdai->bit_clk_inv = 1; 549 rdai->frm_clk_inv = 1; 550 break; 551 case SND_SOC_DAIFMT_NB_NF: 552 default: 553 rdai->bit_clk_inv = 0; 554 rdai->frm_clk_inv = 0; 555 break; 556 } 557 558 /* set format */ 559 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { 560 case SND_SOC_DAIFMT_I2S: 561 rdai->sys_delay = 0; 562 rdai->data_alignment = 0; 563 break; 564 case SND_SOC_DAIFMT_LEFT_J: 565 rdai->sys_delay = 1; 566 rdai->data_alignment = 0; 567 break; 568 case SND_SOC_DAIFMT_RIGHT_J: 569 rdai->sys_delay = 1; 570 rdai->data_alignment = 1; 571 break; 572 } 573 574 return 0; 575 } 576 577 static const struct snd_soc_dai_ops rsnd_soc_dai_ops = { 578 .trigger = rsnd_soc_dai_trigger, 579 .set_fmt = rsnd_soc_dai_set_fmt, 580 }; 581 582 static int rsnd_path_init(struct rsnd_priv *priv, 583 struct rsnd_dai *rdai, 584 struct rsnd_dai_stream *io) 585 { 586 struct rsnd_mod *mod; 587 struct rsnd_dai_platform_info *dai_info = rdai->info; 588 int ret; 589 int ssi_id = -1; 590 int src_id = -1; 591 592 /* 593 * Gen1 is created by SRU/SSI, and this SRU is base module of 594 * Gen2's SCU/SSIU/SSI. (Gen2 SCU/SSIU came from SRU) 595 * 596 * Easy image is.. 597 * Gen1 SRU = Gen2 SCU + SSIU + etc 598 * 599 * Gen2 SCU path is very flexible, but, Gen1 SRU (SCU parts) is 600 * using fixed path. 601 */ 602 if (dai_info) { 603 if (rsnd_is_enable_path(io, ssi)) 604 ssi_id = rsnd_info_id(priv, io, ssi); 605 if (rsnd_is_enable_path(io, src)) 606 src_id = rsnd_info_id(priv, io, src); 607 } else { 608 /* get SSI's ID */ 609 mod = rsnd_ssi_mod_get_frm_dai(priv, 610 rsnd_dai_id(priv, rdai), 611 rsnd_dai_is_play(rdai, io)); 612 if (!mod) 613 return 0; 614 ssi_id = src_id = rsnd_mod_id(mod); 615 } 616 617 ret = 0; 618 619 /* SRC */ 620 if (src_id >= 0) { 621 mod = rsnd_src_mod_get(priv, src_id); 622 ret = rsnd_dai_connect(mod, io); 623 if (ret < 0) 624 return ret; 625 } 626 627 /* SSI */ 628 if (ssi_id >= 0) { 629 mod = rsnd_ssi_mod_get(priv, ssi_id); 630 ret = rsnd_dai_connect(mod, io); 631 if (ret < 0) 632 return ret; 633 } 634 635 return ret; 636 } 637 638 static void rsnd_of_parse_dai(struct platform_device *pdev, 639 const struct rsnd_of_data *of_data, 640 struct rsnd_priv *priv) 641 { 642 struct device_node *dai_node, *dai_np; 643 struct device_node *ssi_node, *ssi_np; 644 struct device_node *src_node, *src_np; 645 struct device_node *playback, *capture; 646 struct rsnd_dai_platform_info *dai_info; 647 struct rcar_snd_info *info = rsnd_priv_to_info(priv); 648 struct device *dev = &pdev->dev; 649 int nr, i; 650 int dai_i, ssi_i, src_i; 651 652 if (!of_data) 653 return; 654 655 dai_node = of_get_child_by_name(dev->of_node, "rcar_sound,dai"); 656 if (!dai_node) 657 return; 658 659 nr = of_get_child_count(dai_node); 660 if (!nr) 661 return; 662 663 dai_info = devm_kzalloc(dev, 664 sizeof(struct rsnd_dai_platform_info) * nr, 665 GFP_KERNEL); 666 if (!dai_info) { 667 dev_err(dev, "dai info allocation error\n"); 668 return; 669 } 670 671 info->dai_info_nr = nr; 672 info->dai_info = dai_info; 673 674 ssi_node = of_get_child_by_name(dev->of_node, "rcar_sound,ssi"); 675 src_node = of_get_child_by_name(dev->of_node, "rcar_sound,src"); 676 677 #define mod_parse(name) \ 678 if (name##_node) { \ 679 struct rsnd_##name##_platform_info *name##_info; \ 680 \ 681 name##_i = 0; \ 682 for_each_child_of_node(name##_node, name##_np) { \ 683 name##_info = info->name##_info + name##_i; \ 684 \ 685 if (name##_np == playback) \ 686 dai_info->playback.name = name##_info; \ 687 if (name##_np == capture) \ 688 dai_info->capture.name = name##_info; \ 689 \ 690 name##_i++; \ 691 } \ 692 } 693 694 /* 695 * parse all dai 696 */ 697 dai_i = 0; 698 for_each_child_of_node(dai_node, dai_np) { 699 dai_info = info->dai_info + dai_i; 700 701 for (i = 0;; i++) { 702 703 playback = of_parse_phandle(dai_np, "playback", i); 704 capture = of_parse_phandle(dai_np, "capture", i); 705 706 if (!playback && !capture) 707 break; 708 709 mod_parse(ssi); 710 mod_parse(src); 711 712 if (playback) 713 of_node_put(playback); 714 if (capture) 715 of_node_put(capture); 716 } 717 718 dai_i++; 719 } 720 } 721 722 static int rsnd_dai_probe(struct platform_device *pdev, 723 const struct rsnd_of_data *of_data, 724 struct rsnd_priv *priv) 725 { 726 struct snd_soc_dai_driver *drv; 727 struct rcar_snd_info *info = rsnd_priv_to_info(priv); 728 struct rsnd_dai *rdai; 729 struct rsnd_mod *pmod, *cmod; 730 struct device *dev = rsnd_priv_to_dev(priv); 731 int dai_nr; 732 int i; 733 734 rsnd_of_parse_dai(pdev, of_data, priv); 735 736 /* 737 * dai_nr should be set via dai_info_nr, 738 * but allow it to keeping compatible 739 */ 740 dai_nr = info->dai_info_nr; 741 if (!dai_nr) { 742 /* get max dai nr */ 743 for (dai_nr = 0; dai_nr < 32; dai_nr++) { 744 pmod = rsnd_ssi_mod_get_frm_dai(priv, dai_nr, 1); 745 cmod = rsnd_ssi_mod_get_frm_dai(priv, dai_nr, 0); 746 747 if (!pmod && !cmod) 748 break; 749 } 750 } 751 752 if (!dai_nr) { 753 dev_err(dev, "no dai\n"); 754 return -EIO; 755 } 756 757 drv = devm_kzalloc(dev, sizeof(*drv) * dai_nr, GFP_KERNEL); 758 rdai = devm_kzalloc(dev, sizeof(*rdai) * dai_nr, GFP_KERNEL); 759 if (!drv || !rdai) { 760 dev_err(dev, "dai allocate failed\n"); 761 return -ENOMEM; 762 } 763 764 priv->rdai_nr = dai_nr; 765 priv->daidrv = drv; 766 priv->rdai = rdai; 767 768 for (i = 0; i < dai_nr; i++) { 769 if (info->dai_info) 770 rdai[i].info = &info->dai_info[i]; 771 772 pmod = rsnd_ssi_mod_get_frm_dai(priv, i, 1); 773 cmod = rsnd_ssi_mod_get_frm_dai(priv, i, 0); 774 775 /* 776 * init rsnd_dai 777 */ 778 snprintf(rdai[i].name, RSND_DAI_NAME_SIZE, "rsnd-dai.%d", i); 779 780 /* 781 * init snd_soc_dai_driver 782 */ 783 drv[i].name = rdai[i].name; 784 drv[i].ops = &rsnd_soc_dai_ops; 785 if (pmod) { 786 drv[i].playback.rates = RSND_RATES; 787 drv[i].playback.formats = RSND_FMTS; 788 drv[i].playback.channels_min = 2; 789 drv[i].playback.channels_max = 2; 790 791 if (info->dai_info) 792 rdai[i].playback.info = &info->dai_info[i].playback; 793 rsnd_path_init(priv, &rdai[i], &rdai[i].playback); 794 } 795 if (cmod) { 796 drv[i].capture.rates = RSND_RATES; 797 drv[i].capture.formats = RSND_FMTS; 798 drv[i].capture.channels_min = 2; 799 drv[i].capture.channels_max = 2; 800 801 if (info->dai_info) 802 rdai[i].capture.info = &info->dai_info[i].capture; 803 rsnd_path_init(priv, &rdai[i], &rdai[i].capture); 804 } 805 806 dev_dbg(dev, "%s (%s/%s)\n", rdai[i].name, 807 pmod ? "play" : " -- ", 808 cmod ? "capture" : " -- "); 809 } 810 811 return 0; 812 } 813 814 /* 815 * pcm ops 816 */ 817 static struct snd_pcm_hardware rsnd_pcm_hardware = { 818 .info = SNDRV_PCM_INFO_INTERLEAVED | 819 SNDRV_PCM_INFO_MMAP | 820 SNDRV_PCM_INFO_MMAP_VALID | 821 SNDRV_PCM_INFO_PAUSE, 822 .buffer_bytes_max = 64 * 1024, 823 .period_bytes_min = 32, 824 .period_bytes_max = 8192, 825 .periods_min = 1, 826 .periods_max = 32, 827 .fifo_size = 256, 828 }; 829 830 static int rsnd_pcm_open(struct snd_pcm_substream *substream) 831 { 832 struct snd_pcm_runtime *runtime = substream->runtime; 833 int ret = 0; 834 835 snd_soc_set_runtime_hwparams(substream, &rsnd_pcm_hardware); 836 837 ret = snd_pcm_hw_constraint_integer(runtime, 838 SNDRV_PCM_HW_PARAM_PERIODS); 839 840 return ret; 841 } 842 843 static int rsnd_hw_params(struct snd_pcm_substream *substream, 844 struct snd_pcm_hw_params *hw_params) 845 { 846 return snd_pcm_lib_malloc_pages(substream, 847 params_buffer_bytes(hw_params)); 848 } 849 850 static snd_pcm_uframes_t rsnd_pointer(struct snd_pcm_substream *substream) 851 { 852 struct snd_pcm_runtime *runtime = substream->runtime; 853 struct snd_soc_dai *dai = rsnd_substream_to_dai(substream); 854 struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai); 855 struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream); 856 857 return bytes_to_frames(runtime, io->byte_pos); 858 } 859 860 static struct snd_pcm_ops rsnd_pcm_ops = { 861 .open = rsnd_pcm_open, 862 .ioctl = snd_pcm_lib_ioctl, 863 .hw_params = rsnd_hw_params, 864 .hw_free = snd_pcm_lib_free_pages, 865 .pointer = rsnd_pointer, 866 }; 867 868 /* 869 * snd_soc_platform 870 */ 871 872 #define PREALLOC_BUFFER (32 * 1024) 873 #define PREALLOC_BUFFER_MAX (32 * 1024) 874 875 static int rsnd_pcm_new(struct snd_soc_pcm_runtime *rtd) 876 { 877 return snd_pcm_lib_preallocate_pages_for_all( 878 rtd->pcm, 879 SNDRV_DMA_TYPE_DEV, 880 rtd->card->snd_card->dev, 881 PREALLOC_BUFFER, PREALLOC_BUFFER_MAX); 882 } 883 884 static void rsnd_pcm_free(struct snd_pcm *pcm) 885 { 886 snd_pcm_lib_preallocate_free_for_all(pcm); 887 } 888 889 static struct snd_soc_platform_driver rsnd_soc_platform = { 890 .ops = &rsnd_pcm_ops, 891 .pcm_new = rsnd_pcm_new, 892 .pcm_free = rsnd_pcm_free, 893 }; 894 895 static const struct snd_soc_component_driver rsnd_soc_component = { 896 .name = "rsnd", 897 }; 898 899 /* 900 * rsnd probe 901 */ 902 static int rsnd_probe(struct platform_device *pdev) 903 { 904 struct rcar_snd_info *info; 905 struct rsnd_priv *priv; 906 struct device *dev = &pdev->dev; 907 struct rsnd_dai *rdai; 908 const struct of_device_id *of_id = of_match_device(rsnd_of_match, dev); 909 const struct rsnd_of_data *of_data; 910 int (*probe_func[])(struct platform_device *pdev, 911 const struct rsnd_of_data *of_data, 912 struct rsnd_priv *priv) = { 913 rsnd_gen_probe, 914 rsnd_ssi_probe, 915 rsnd_src_probe, 916 rsnd_adg_probe, 917 rsnd_dai_probe, 918 }; 919 int ret, i; 920 921 info = NULL; 922 of_data = NULL; 923 if (of_id) { 924 info = devm_kzalloc(&pdev->dev, 925 sizeof(struct rcar_snd_info), GFP_KERNEL); 926 of_data = of_id->data; 927 } else { 928 info = pdev->dev.platform_data; 929 } 930 931 if (!info) { 932 dev_err(dev, "driver needs R-Car sound information\n"); 933 return -ENODEV; 934 } 935 936 /* 937 * init priv data 938 */ 939 priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); 940 if (!priv) { 941 dev_err(dev, "priv allocate failed\n"); 942 return -ENODEV; 943 } 944 945 priv->dev = dev; 946 priv->info = info; 947 spin_lock_init(&priv->lock); 948 949 /* 950 * init each module 951 */ 952 for (i = 0; i < ARRAY_SIZE(probe_func); i++) { 953 ret = probe_func[i](pdev, of_data, priv); 954 if (ret) 955 return ret; 956 } 957 958 for_each_rsnd_dai(rdai, priv, i) { 959 ret = rsnd_dai_call(rdai, &rdai->playback, probe); 960 if (ret) 961 return ret; 962 963 ret = rsnd_dai_call(rdai, &rdai->capture, probe); 964 if (ret) 965 return ret; 966 } 967 968 /* 969 * asoc register 970 */ 971 ret = snd_soc_register_platform(dev, &rsnd_soc_platform); 972 if (ret < 0) { 973 dev_err(dev, "cannot snd soc register\n"); 974 return ret; 975 } 976 977 ret = snd_soc_register_component(dev, &rsnd_soc_component, 978 priv->daidrv, rsnd_rdai_nr(priv)); 979 if (ret < 0) { 980 dev_err(dev, "cannot snd dai register\n"); 981 goto exit_snd_soc; 982 } 983 984 dev_set_drvdata(dev, priv); 985 986 pm_runtime_enable(dev); 987 988 dev_info(dev, "probed\n"); 989 return ret; 990 991 exit_snd_soc: 992 snd_soc_unregister_platform(dev); 993 994 return ret; 995 } 996 997 static int rsnd_remove(struct platform_device *pdev) 998 { 999 struct rsnd_priv *priv = dev_get_drvdata(&pdev->dev); 1000 struct rsnd_dai *rdai; 1001 int ret, i; 1002 1003 pm_runtime_disable(&pdev->dev); 1004 1005 for_each_rsnd_dai(rdai, priv, i) { 1006 ret = rsnd_dai_call(rdai, &rdai->playback, remove); 1007 if (ret) 1008 return ret; 1009 1010 ret = rsnd_dai_call(rdai, &rdai->capture, remove); 1011 if (ret) 1012 return ret; 1013 } 1014 1015 return 0; 1016 } 1017 1018 static struct platform_driver rsnd_driver = { 1019 .driver = { 1020 .name = "rcar_sound", 1021 .of_match_table = rsnd_of_match, 1022 }, 1023 .probe = rsnd_probe, 1024 .remove = rsnd_remove, 1025 }; 1026 module_platform_driver(rsnd_driver); 1027 1028 MODULE_LICENSE("GPL"); 1029 MODULE_DESCRIPTION("Renesas R-Car audio driver"); 1030 MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>"); 1031 MODULE_ALIAS("platform:rcar-pcm-audio"); 1032