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 char *rsnd_mod_dma_name(struct rsnd_mod *mod) 142 { 143 if (!mod || !mod->ops) 144 return "unknown"; 145 146 if (!mod->ops->dma_name) 147 return mod->ops->name; 148 149 return mod->ops->dma_name(mod); 150 } 151 152 void rsnd_mod_init(struct rsnd_priv *priv, 153 struct rsnd_mod *mod, 154 struct rsnd_mod_ops *ops, 155 enum rsnd_mod_type type, 156 int id) 157 { 158 mod->priv = priv; 159 mod->id = id; 160 mod->ops = ops; 161 mod->type = type; 162 } 163 164 /* 165 * rsnd_dma functions 166 */ 167 void rsnd_dma_stop(struct rsnd_dma *dma) 168 { 169 dmaengine_terminate_all(dma->chan); 170 } 171 172 static void rsnd_dma_complete(void *data) 173 { 174 struct rsnd_dma *dma = (struct rsnd_dma *)data; 175 struct rsnd_mod *mod = rsnd_dma_to_mod(dma); 176 struct rsnd_dai_stream *io = rsnd_mod_to_io(mod); 177 178 /* 179 * Renesas sound Gen1 needs 1 DMAC, 180 * Gen2 needs 2 DMAC. 181 * In Gen2 case, it are Audio-DMAC, and Audio-DMAC-peri-peri. 182 * But, Audio-DMAC-peri-peri doesn't have interrupt, 183 * and this driver is assuming that here. 184 * 185 * If Audio-DMAC-peri-peri has interrpt, 186 * rsnd_dai_pointer_update() will be called twice, 187 * ant it will breaks io->byte_pos 188 */ 189 190 rsnd_dai_pointer_update(io, io->byte_per_period); 191 } 192 193 void rsnd_dma_start(struct rsnd_dma *dma) 194 { 195 struct rsnd_mod *mod = rsnd_dma_to_mod(dma); 196 struct rsnd_priv *priv = rsnd_mod_to_priv(mod); 197 struct rsnd_dai_stream *io = rsnd_mod_to_io(mod); 198 struct snd_pcm_substream *substream = io->substream; 199 struct device *dev = rsnd_priv_to_dev(priv); 200 struct dma_async_tx_descriptor *desc; 201 202 desc = dmaengine_prep_dma_cyclic(dma->chan, 203 (dma->addr) ? dma->addr : 204 substream->runtime->dma_addr, 205 snd_pcm_lib_buffer_bytes(substream), 206 snd_pcm_lib_period_bytes(substream), 207 dma->dir, 208 DMA_PREP_INTERRUPT | DMA_CTRL_ACK); 209 210 if (!desc) { 211 dev_err(dev, "dmaengine_prep_slave_sg() fail\n"); 212 return; 213 } 214 215 desc->callback = rsnd_dma_complete; 216 desc->callback_param = dma; 217 218 if (dmaengine_submit(desc) < 0) { 219 dev_err(dev, "dmaengine_submit() fail\n"); 220 return; 221 } 222 223 dma_async_issue_pending(dma->chan); 224 } 225 226 int rsnd_dma_available(struct rsnd_dma *dma) 227 { 228 return !!dma->chan; 229 } 230 231 #define DMA_NAME_SIZE 16 232 #define MOD_MAX 4 /* MEM/SSI/SRC/DVC */ 233 static int _rsnd_dma_of_name(char *dma_name, struct rsnd_mod *mod) 234 { 235 if (mod) 236 return snprintf(dma_name, DMA_NAME_SIZE / 2, "%s%d", 237 rsnd_mod_dma_name(mod), rsnd_mod_id(mod)); 238 else 239 return snprintf(dma_name, DMA_NAME_SIZE / 2, "mem"); 240 241 } 242 243 static void rsnd_dma_of_name(struct rsnd_mod *mod_from, 244 struct rsnd_mod *mod_to, 245 char *dma_name) 246 { 247 int index = 0; 248 249 index = _rsnd_dma_of_name(dma_name + index, mod_from); 250 *(dma_name + index++) = '_'; 251 index = _rsnd_dma_of_name(dma_name + index, mod_to); 252 } 253 254 static void rsnd_dma_of_path(struct rsnd_dma *dma, 255 int is_play, 256 struct rsnd_mod **mod_from, 257 struct rsnd_mod **mod_to) 258 { 259 struct rsnd_mod *this = rsnd_dma_to_mod(dma); 260 struct rsnd_dai_stream *io = rsnd_mod_to_io(this); 261 struct rsnd_mod *ssi = rsnd_io_to_mod_ssi(io); 262 struct rsnd_mod *src = rsnd_io_to_mod_src(io); 263 struct rsnd_mod *dvc = rsnd_io_to_mod_dvc(io); 264 struct rsnd_mod *mod[MOD_MAX]; 265 int i, index; 266 267 268 for (i = 0; i < MOD_MAX; i++) 269 mod[i] = NULL; 270 271 /* 272 * in play case... 273 * 274 * src -> dst 275 * 276 * mem -> SSI 277 * mem -> SRC -> SSI 278 * mem -> SRC -> DVC -> SSI 279 */ 280 mod[0] = NULL; /* for "mem" */ 281 index = 1; 282 for (i = 1; i < MOD_MAX; i++) { 283 if (!src) { 284 mod[i] = ssi; 285 } else if (!dvc) { 286 mod[i] = src; 287 src = NULL; 288 } else { 289 if ((!is_play) && (this == src)) 290 this = dvc; 291 292 mod[i] = (is_play) ? src : dvc; 293 i++; 294 mod[i] = (is_play) ? dvc : src; 295 src = NULL; 296 dvc = NULL; 297 } 298 299 if (mod[i] == this) 300 index = i; 301 302 if (mod[i] == ssi) 303 break; 304 } 305 306 if (is_play) { 307 *mod_from = mod[index - 1]; 308 *mod_to = mod[index]; 309 } else { 310 *mod_from = mod[index]; 311 *mod_to = mod[index - 1]; 312 } 313 } 314 315 int rsnd_dma_init(struct rsnd_priv *priv, struct rsnd_dma *dma, 316 int is_play, int id) 317 { 318 struct device *dev = rsnd_priv_to_dev(priv); 319 struct dma_slave_config cfg; 320 struct rsnd_mod *mod_from; 321 struct rsnd_mod *mod_to; 322 char dma_name[DMA_NAME_SIZE]; 323 dma_cap_mask_t mask; 324 int ret; 325 326 if (dma->chan) { 327 dev_err(dev, "it already has dma channel\n"); 328 return -EIO; 329 } 330 331 dma_cap_zero(mask); 332 dma_cap_set(DMA_SLAVE, mask); 333 334 rsnd_dma_of_path(dma, is_play, &mod_from, &mod_to); 335 rsnd_dma_of_name(mod_from, mod_to, dma_name); 336 337 cfg.slave_id = id; 338 cfg.direction = is_play ? DMA_MEM_TO_DEV : DMA_DEV_TO_MEM; 339 cfg.src_addr = rsnd_gen_dma_addr(priv, mod_from, is_play, 1); 340 cfg.dst_addr = rsnd_gen_dma_addr(priv, mod_to, is_play, 0); 341 cfg.src_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES; 342 cfg.dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES; 343 344 dev_dbg(dev, "dma : %s %pad -> %pad\n", 345 dma_name, &cfg.src_addr, &cfg.dst_addr); 346 347 dma->chan = dma_request_slave_channel_compat(mask, shdma_chan_filter, 348 (void *)id, dev, 349 dma_name); 350 if (!dma->chan) { 351 dev_err(dev, "can't get dma channel\n"); 352 goto rsnd_dma_channel_err; 353 } 354 355 ret = dmaengine_slave_config(dma->chan, &cfg); 356 if (ret < 0) 357 goto rsnd_dma_init_err; 358 359 dma->addr = is_play ? cfg.src_addr : cfg.dst_addr; 360 dma->dir = is_play ? DMA_MEM_TO_DEV : DMA_DEV_TO_MEM; 361 362 return 0; 363 364 rsnd_dma_init_err: 365 rsnd_dma_quit(priv, dma); 366 rsnd_dma_channel_err: 367 368 /* 369 * DMA failed. try to PIO mode 370 * see 371 * rsnd_ssi_fallback() 372 * rsnd_rdai_continuance_probe() 373 */ 374 return -EAGAIN; 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 u32 mask = 1 << __rsnd_mod_shift_##func; \ 420 u32 call = __rsnd_mod_call_##func << __rsnd_mod_shift_##func; \ 421 int ret = 0; \ 422 if ((mod->status & mask) == call) { \ 423 dev_dbg(dev, "%s[%d] %s\n", \ 424 rsnd_mod_name(mod), rsnd_mod_id(mod), #func); \ 425 ret = (mod)->ops->func(mod, rdai); \ 426 mod->status = (mod->status & ~mask) | (~call & mask); \ 427 } \ 428 ret; \ 429 }) 430 431 #define rsnd_mod_call(mod, func, rdai...) \ 432 (!(mod) ? -ENODEV : \ 433 !((mod)->ops->func) ? 0 : \ 434 __rsnd_mod_call(mod, func, rdai)) 435 436 #define rsnd_dai_call(fn, io, rdai...) \ 437 ({ \ 438 struct rsnd_mod *mod; \ 439 int ret = 0, i; \ 440 for (i = 0; i < RSND_MOD_MAX; i++) { \ 441 mod = (io)->mod[i]; \ 442 if (!mod) \ 443 continue; \ 444 ret = rsnd_mod_call(mod, fn, rdai); \ 445 if (ret < 0) \ 446 break; \ 447 } \ 448 ret; \ 449 }) 450 451 static int rsnd_dai_connect(struct rsnd_mod *mod, 452 struct rsnd_dai_stream *io) 453 { 454 if (!mod) 455 return -EIO; 456 457 if (io->mod[mod->type]) { 458 struct rsnd_priv *priv = rsnd_mod_to_priv(mod); 459 struct device *dev = rsnd_priv_to_dev(priv); 460 461 dev_err(dev, "%s%d is not empty\n", 462 rsnd_mod_name(mod), 463 rsnd_mod_id(mod)); 464 return -EIO; 465 } 466 467 io->mod[mod->type] = mod; 468 mod->io = io; 469 470 return 0; 471 } 472 473 static void rsnd_dai_disconnect(struct rsnd_mod *mod, 474 struct rsnd_dai_stream *io) 475 { 476 mod->io = NULL; 477 io->mod[mod->type] = NULL; 478 } 479 480 int rsnd_dai_id(struct rsnd_priv *priv, struct rsnd_dai *rdai) 481 { 482 int id = rdai - priv->rdai; 483 484 if ((id < 0) || (id >= rsnd_rdai_nr(priv))) 485 return -EINVAL; 486 487 return id; 488 } 489 490 struct rsnd_dai *rsnd_dai_get(struct rsnd_priv *priv, int id) 491 { 492 if ((id < 0) || (id >= rsnd_rdai_nr(priv))) 493 return NULL; 494 495 return priv->rdai + id; 496 } 497 498 static struct rsnd_dai *rsnd_dai_to_rdai(struct snd_soc_dai *dai) 499 { 500 struct rsnd_priv *priv = snd_soc_dai_get_drvdata(dai); 501 502 return rsnd_dai_get(priv, dai->id); 503 } 504 505 int rsnd_dai_is_play(struct rsnd_dai *rdai, struct rsnd_dai_stream *io) 506 { 507 return &rdai->playback == io; 508 } 509 510 /* 511 * rsnd_soc_dai functions 512 */ 513 int rsnd_dai_pointer_offset(struct rsnd_dai_stream *io, int additional) 514 { 515 struct snd_pcm_substream *substream = io->substream; 516 struct snd_pcm_runtime *runtime = substream->runtime; 517 int pos = io->byte_pos + additional; 518 519 pos %= (runtime->periods * io->byte_per_period); 520 521 return pos; 522 } 523 524 void rsnd_dai_pointer_update(struct rsnd_dai_stream *io, int byte) 525 { 526 io->byte_pos += byte; 527 528 if (io->byte_pos >= io->next_period_byte) { 529 struct snd_pcm_substream *substream = io->substream; 530 struct snd_pcm_runtime *runtime = substream->runtime; 531 532 io->period_pos++; 533 io->next_period_byte += io->byte_per_period; 534 535 if (io->period_pos >= runtime->periods) { 536 io->byte_pos = 0; 537 io->period_pos = 0; 538 io->next_period_byte = io->byte_per_period; 539 } 540 541 snd_pcm_period_elapsed(substream); 542 } 543 } 544 545 static int rsnd_dai_stream_init(struct rsnd_dai_stream *io, 546 struct snd_pcm_substream *substream) 547 { 548 struct snd_pcm_runtime *runtime = substream->runtime; 549 550 io->substream = substream; 551 io->byte_pos = 0; 552 io->period_pos = 0; 553 io->byte_per_period = runtime->period_size * 554 runtime->channels * 555 samples_to_bytes(runtime, 1); 556 io->next_period_byte = io->byte_per_period; 557 558 return 0; 559 } 560 561 static 562 struct snd_soc_dai *rsnd_substream_to_dai(struct snd_pcm_substream *substream) 563 { 564 struct snd_soc_pcm_runtime *rtd = substream->private_data; 565 566 return rtd->cpu_dai; 567 } 568 569 static 570 struct rsnd_dai_stream *rsnd_rdai_to_io(struct rsnd_dai *rdai, 571 struct snd_pcm_substream *substream) 572 { 573 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 574 return &rdai->playback; 575 else 576 return &rdai->capture; 577 } 578 579 static int rsnd_soc_dai_trigger(struct snd_pcm_substream *substream, int cmd, 580 struct snd_soc_dai *dai) 581 { 582 struct rsnd_priv *priv = snd_soc_dai_get_drvdata(dai); 583 struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai); 584 struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream); 585 int ssi_id = rsnd_mod_id(rsnd_io_to_mod_ssi(io)); 586 int ret; 587 unsigned long flags; 588 589 rsnd_lock(priv, flags); 590 591 switch (cmd) { 592 case SNDRV_PCM_TRIGGER_START: 593 ret = rsnd_dai_stream_init(io, substream); 594 if (ret < 0) 595 goto dai_trigger_end; 596 597 ret = rsnd_platform_call(priv, dai, start, ssi_id); 598 if (ret < 0) 599 goto dai_trigger_end; 600 601 ret = rsnd_dai_call(init, io, rdai); 602 if (ret < 0) 603 goto dai_trigger_end; 604 605 ret = rsnd_dai_call(start, io, rdai); 606 if (ret < 0) 607 goto dai_trigger_end; 608 break; 609 case SNDRV_PCM_TRIGGER_STOP: 610 ret = rsnd_dai_call(stop, io, rdai); 611 if (ret < 0) 612 goto dai_trigger_end; 613 614 ret = rsnd_dai_call(quit, io, rdai); 615 if (ret < 0) 616 goto dai_trigger_end; 617 618 ret = rsnd_platform_call(priv, dai, stop, ssi_id); 619 if (ret < 0) 620 goto dai_trigger_end; 621 break; 622 default: 623 ret = -EINVAL; 624 } 625 626 dai_trigger_end: 627 rsnd_unlock(priv, flags); 628 629 return ret; 630 } 631 632 static int rsnd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt) 633 { 634 struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai); 635 636 /* set master/slave audio interface */ 637 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { 638 case SND_SOC_DAIFMT_CBM_CFM: 639 rdai->clk_master = 0; 640 break; 641 case SND_SOC_DAIFMT_CBS_CFS: 642 rdai->clk_master = 1; /* codec is slave, cpu is master */ 643 break; 644 default: 645 return -EINVAL; 646 } 647 648 /* set format */ 649 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { 650 case SND_SOC_DAIFMT_I2S: 651 rdai->sys_delay = 0; 652 rdai->data_alignment = 0; 653 rdai->frm_clk_inv = 0; 654 break; 655 case SND_SOC_DAIFMT_LEFT_J: 656 rdai->sys_delay = 1; 657 rdai->data_alignment = 0; 658 rdai->frm_clk_inv = 1; 659 break; 660 case SND_SOC_DAIFMT_RIGHT_J: 661 rdai->sys_delay = 1; 662 rdai->data_alignment = 1; 663 rdai->frm_clk_inv = 1; 664 break; 665 } 666 667 /* set clock inversion */ 668 switch (fmt & SND_SOC_DAIFMT_INV_MASK) { 669 case SND_SOC_DAIFMT_NB_IF: 670 rdai->bit_clk_inv = rdai->bit_clk_inv; 671 rdai->frm_clk_inv = !rdai->frm_clk_inv; 672 break; 673 case SND_SOC_DAIFMT_IB_NF: 674 rdai->bit_clk_inv = !rdai->bit_clk_inv; 675 rdai->frm_clk_inv = rdai->frm_clk_inv; 676 break; 677 case SND_SOC_DAIFMT_IB_IF: 678 rdai->bit_clk_inv = !rdai->bit_clk_inv; 679 rdai->frm_clk_inv = !rdai->frm_clk_inv; 680 break; 681 case SND_SOC_DAIFMT_NB_NF: 682 default: 683 break; 684 } 685 686 return 0; 687 } 688 689 static const struct snd_soc_dai_ops rsnd_soc_dai_ops = { 690 .trigger = rsnd_soc_dai_trigger, 691 .set_fmt = rsnd_soc_dai_set_fmt, 692 }; 693 694 #define rsnd_path_parse(priv, io, type) \ 695 ({ \ 696 struct rsnd_mod *mod; \ 697 int ret = 0; \ 698 int id = -1; \ 699 \ 700 if (rsnd_is_enable_path(io, type)) { \ 701 id = rsnd_info_id(priv, io, type); \ 702 if (id >= 0) { \ 703 mod = rsnd_##type##_mod_get(priv, id); \ 704 ret = rsnd_dai_connect(mod, io); \ 705 } \ 706 } \ 707 ret; \ 708 }) 709 710 #define rsnd_path_break(priv, io, type) \ 711 { \ 712 struct rsnd_mod *mod; \ 713 int id = -1; \ 714 \ 715 if (rsnd_is_enable_path(io, type)) { \ 716 id = rsnd_info_id(priv, io, type); \ 717 if (id >= 0) { \ 718 mod = rsnd_##type##_mod_get(priv, id); \ 719 rsnd_dai_disconnect(mod, io); \ 720 } \ 721 } \ 722 } 723 724 static int rsnd_path_init(struct rsnd_priv *priv, 725 struct rsnd_dai *rdai, 726 struct rsnd_dai_stream *io) 727 { 728 int ret; 729 730 /* 731 * Gen1 is created by SRU/SSI, and this SRU is base module of 732 * Gen2's SCU/SSIU/SSI. (Gen2 SCU/SSIU came from SRU) 733 * 734 * Easy image is.. 735 * Gen1 SRU = Gen2 SCU + SSIU + etc 736 * 737 * Gen2 SCU path is very flexible, but, Gen1 SRU (SCU parts) is 738 * using fixed path. 739 */ 740 741 /* SRC */ 742 ret = rsnd_path_parse(priv, io, src); 743 if (ret < 0) 744 return ret; 745 746 /* SSI */ 747 ret = rsnd_path_parse(priv, io, ssi); 748 if (ret < 0) 749 return ret; 750 751 /* DVC */ 752 ret = rsnd_path_parse(priv, io, dvc); 753 if (ret < 0) 754 return ret; 755 756 return ret; 757 } 758 759 static void rsnd_of_parse_dai(struct platform_device *pdev, 760 const struct rsnd_of_data *of_data, 761 struct rsnd_priv *priv) 762 { 763 struct device_node *dai_node, *dai_np; 764 struct device_node *ssi_node, *ssi_np; 765 struct device_node *src_node, *src_np; 766 struct device_node *dvc_node, *dvc_np; 767 struct device_node *playback, *capture; 768 struct rsnd_dai_platform_info *dai_info; 769 struct rcar_snd_info *info = rsnd_priv_to_info(priv); 770 struct device *dev = &pdev->dev; 771 int nr, i; 772 int dai_i, ssi_i, src_i, dvc_i; 773 774 if (!of_data) 775 return; 776 777 dai_node = of_get_child_by_name(dev->of_node, "rcar_sound,dai"); 778 if (!dai_node) 779 return; 780 781 nr = of_get_child_count(dai_node); 782 if (!nr) 783 return; 784 785 dai_info = devm_kzalloc(dev, 786 sizeof(struct rsnd_dai_platform_info) * nr, 787 GFP_KERNEL); 788 if (!dai_info) { 789 dev_err(dev, "dai info allocation error\n"); 790 return; 791 } 792 793 info->dai_info_nr = nr; 794 info->dai_info = dai_info; 795 796 ssi_node = of_get_child_by_name(dev->of_node, "rcar_sound,ssi"); 797 src_node = of_get_child_by_name(dev->of_node, "rcar_sound,src"); 798 dvc_node = of_get_child_by_name(dev->of_node, "rcar_sound,dvc"); 799 800 #define mod_parse(name) \ 801 if (name##_node) { \ 802 struct rsnd_##name##_platform_info *name##_info; \ 803 \ 804 name##_i = 0; \ 805 for_each_child_of_node(name##_node, name##_np) { \ 806 name##_info = info->name##_info + name##_i; \ 807 \ 808 if (name##_np == playback) \ 809 dai_info->playback.name = name##_info; \ 810 if (name##_np == capture) \ 811 dai_info->capture.name = name##_info; \ 812 \ 813 name##_i++; \ 814 } \ 815 } 816 817 /* 818 * parse all dai 819 */ 820 dai_i = 0; 821 for_each_child_of_node(dai_node, dai_np) { 822 dai_info = info->dai_info + dai_i; 823 824 for (i = 0;; i++) { 825 826 playback = of_parse_phandle(dai_np, "playback", i); 827 capture = of_parse_phandle(dai_np, "capture", i); 828 829 if (!playback && !capture) 830 break; 831 832 mod_parse(ssi); 833 mod_parse(src); 834 mod_parse(dvc); 835 836 of_node_put(playback); 837 of_node_put(capture); 838 } 839 840 dai_i++; 841 } 842 } 843 844 static int rsnd_dai_probe(struct platform_device *pdev, 845 const struct rsnd_of_data *of_data, 846 struct rsnd_priv *priv) 847 { 848 struct snd_soc_dai_driver *drv; 849 struct rcar_snd_info *info = rsnd_priv_to_info(priv); 850 struct rsnd_dai *rdai; 851 struct rsnd_ssi_platform_info *pmod, *cmod; 852 struct device *dev = rsnd_priv_to_dev(priv); 853 int dai_nr; 854 int i; 855 856 rsnd_of_parse_dai(pdev, of_data, priv); 857 858 dai_nr = info->dai_info_nr; 859 if (!dai_nr) { 860 dev_err(dev, "no dai\n"); 861 return -EIO; 862 } 863 864 drv = devm_kzalloc(dev, sizeof(*drv) * dai_nr, GFP_KERNEL); 865 rdai = devm_kzalloc(dev, sizeof(*rdai) * dai_nr, GFP_KERNEL); 866 if (!drv || !rdai) { 867 dev_err(dev, "dai allocate failed\n"); 868 return -ENOMEM; 869 } 870 871 priv->rdai_nr = dai_nr; 872 priv->daidrv = drv; 873 priv->rdai = rdai; 874 875 for (i = 0; i < dai_nr; i++) { 876 rdai[i].info = &info->dai_info[i]; 877 878 pmod = rdai[i].info->playback.ssi; 879 cmod = rdai[i].info->capture.ssi; 880 881 /* 882 * init rsnd_dai 883 */ 884 snprintf(rdai[i].name, RSND_DAI_NAME_SIZE, "rsnd-dai.%d", i); 885 886 /* 887 * init snd_soc_dai_driver 888 */ 889 drv[i].name = rdai[i].name; 890 drv[i].ops = &rsnd_soc_dai_ops; 891 if (pmod) { 892 drv[i].playback.rates = RSND_RATES; 893 drv[i].playback.formats = RSND_FMTS; 894 drv[i].playback.channels_min = 2; 895 drv[i].playback.channels_max = 2; 896 897 rdai[i].playback.info = &info->dai_info[i].playback; 898 rsnd_path_init(priv, &rdai[i], &rdai[i].playback); 899 } 900 if (cmod) { 901 drv[i].capture.rates = RSND_RATES; 902 drv[i].capture.formats = RSND_FMTS; 903 drv[i].capture.channels_min = 2; 904 drv[i].capture.channels_max = 2; 905 906 rdai[i].capture.info = &info->dai_info[i].capture; 907 rsnd_path_init(priv, &rdai[i], &rdai[i].capture); 908 } 909 910 dev_dbg(dev, "%s (%s/%s)\n", rdai[i].name, 911 pmod ? "play" : " -- ", 912 cmod ? "capture" : " -- "); 913 } 914 915 return 0; 916 } 917 918 /* 919 * pcm ops 920 */ 921 static struct snd_pcm_hardware rsnd_pcm_hardware = { 922 .info = SNDRV_PCM_INFO_INTERLEAVED | 923 SNDRV_PCM_INFO_MMAP | 924 SNDRV_PCM_INFO_MMAP_VALID, 925 .buffer_bytes_max = 64 * 1024, 926 .period_bytes_min = 32, 927 .period_bytes_max = 8192, 928 .periods_min = 1, 929 .periods_max = 32, 930 .fifo_size = 256, 931 }; 932 933 static int rsnd_pcm_open(struct snd_pcm_substream *substream) 934 { 935 struct snd_pcm_runtime *runtime = substream->runtime; 936 int ret = 0; 937 938 snd_soc_set_runtime_hwparams(substream, &rsnd_pcm_hardware); 939 940 ret = snd_pcm_hw_constraint_integer(runtime, 941 SNDRV_PCM_HW_PARAM_PERIODS); 942 943 return ret; 944 } 945 946 static int rsnd_hw_params(struct snd_pcm_substream *substream, 947 struct snd_pcm_hw_params *hw_params) 948 { 949 return snd_pcm_lib_malloc_pages(substream, 950 params_buffer_bytes(hw_params)); 951 } 952 953 static snd_pcm_uframes_t rsnd_pointer(struct snd_pcm_substream *substream) 954 { 955 struct snd_pcm_runtime *runtime = substream->runtime; 956 struct snd_soc_dai *dai = rsnd_substream_to_dai(substream); 957 struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai); 958 struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream); 959 960 return bytes_to_frames(runtime, io->byte_pos); 961 } 962 963 static struct snd_pcm_ops rsnd_pcm_ops = { 964 .open = rsnd_pcm_open, 965 .ioctl = snd_pcm_lib_ioctl, 966 .hw_params = rsnd_hw_params, 967 .hw_free = snd_pcm_lib_free_pages, 968 .pointer = rsnd_pointer, 969 }; 970 971 /* 972 * snd_kcontrol 973 */ 974 #define kcontrol_to_cfg(kctrl) ((struct rsnd_kctrl_cfg *)kctrl->private_value) 975 static int rsnd_kctrl_info(struct snd_kcontrol *kctrl, 976 struct snd_ctl_elem_info *uinfo) 977 { 978 struct rsnd_kctrl_cfg *cfg = kcontrol_to_cfg(kctrl); 979 980 if (cfg->texts) { 981 uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED; 982 uinfo->count = cfg->size; 983 uinfo->value.enumerated.items = cfg->max; 984 if (uinfo->value.enumerated.item >= cfg->max) 985 uinfo->value.enumerated.item = cfg->max - 1; 986 strlcpy(uinfo->value.enumerated.name, 987 cfg->texts[uinfo->value.enumerated.item], 988 sizeof(uinfo->value.enumerated.name)); 989 } else { 990 uinfo->count = cfg->size; 991 uinfo->value.integer.min = 0; 992 uinfo->value.integer.max = cfg->max; 993 uinfo->type = (cfg->max == 1) ? 994 SNDRV_CTL_ELEM_TYPE_BOOLEAN : 995 SNDRV_CTL_ELEM_TYPE_INTEGER; 996 } 997 998 return 0; 999 } 1000 1001 static int rsnd_kctrl_get(struct snd_kcontrol *kctrl, 1002 struct snd_ctl_elem_value *uc) 1003 { 1004 struct rsnd_kctrl_cfg *cfg = kcontrol_to_cfg(kctrl); 1005 int i; 1006 1007 for (i = 0; i < cfg->size; i++) 1008 if (cfg->texts) 1009 uc->value.enumerated.item[i] = cfg->val[i]; 1010 else 1011 uc->value.integer.value[i] = cfg->val[i]; 1012 1013 return 0; 1014 } 1015 1016 static int rsnd_kctrl_put(struct snd_kcontrol *kctrl, 1017 struct snd_ctl_elem_value *uc) 1018 { 1019 struct rsnd_mod *mod = snd_kcontrol_chip(kctrl); 1020 struct rsnd_kctrl_cfg *cfg = kcontrol_to_cfg(kctrl); 1021 int i, change = 0; 1022 1023 for (i = 0; i < cfg->size; i++) { 1024 if (cfg->texts) { 1025 change |= (uc->value.enumerated.item[i] != cfg->val[i]); 1026 cfg->val[i] = uc->value.enumerated.item[i]; 1027 } else { 1028 change |= (uc->value.integer.value[i] != cfg->val[i]); 1029 cfg->val[i] = uc->value.integer.value[i]; 1030 } 1031 } 1032 1033 if (change) 1034 cfg->update(mod); 1035 1036 return change; 1037 } 1038 1039 static int __rsnd_kctrl_new(struct rsnd_mod *mod, 1040 struct rsnd_dai *rdai, 1041 struct snd_soc_pcm_runtime *rtd, 1042 const unsigned char *name, 1043 struct rsnd_kctrl_cfg *cfg, 1044 void (*update)(struct rsnd_mod *mod)) 1045 { 1046 struct snd_card *card = rtd->card->snd_card; 1047 struct snd_kcontrol *kctrl; 1048 struct snd_kcontrol_new knew = { 1049 .iface = SNDRV_CTL_ELEM_IFACE_MIXER, 1050 .name = name, 1051 .info = rsnd_kctrl_info, 1052 .get = rsnd_kctrl_get, 1053 .put = rsnd_kctrl_put, 1054 .private_value = (unsigned long)cfg, 1055 }; 1056 int ret; 1057 1058 kctrl = snd_ctl_new1(&knew, mod); 1059 if (!kctrl) 1060 return -ENOMEM; 1061 1062 ret = snd_ctl_add(card, kctrl); 1063 if (ret < 0) 1064 return ret; 1065 1066 cfg->update = update; 1067 1068 return 0; 1069 } 1070 1071 int rsnd_kctrl_new_m(struct rsnd_mod *mod, 1072 struct rsnd_dai *rdai, 1073 struct snd_soc_pcm_runtime *rtd, 1074 const unsigned char *name, 1075 void (*update)(struct rsnd_mod *mod), 1076 struct rsnd_kctrl_cfg_m *_cfg, 1077 u32 max) 1078 { 1079 _cfg->cfg.max = max; 1080 _cfg->cfg.size = RSND_DVC_CHANNELS; 1081 _cfg->cfg.val = _cfg->val; 1082 return __rsnd_kctrl_new(mod, rdai, rtd, name, &_cfg->cfg, update); 1083 } 1084 1085 int rsnd_kctrl_new_s(struct rsnd_mod *mod, 1086 struct rsnd_dai *rdai, 1087 struct snd_soc_pcm_runtime *rtd, 1088 const unsigned char *name, 1089 void (*update)(struct rsnd_mod *mod), 1090 struct rsnd_kctrl_cfg_s *_cfg, 1091 u32 max) 1092 { 1093 _cfg->cfg.max = max; 1094 _cfg->cfg.size = 1; 1095 _cfg->cfg.val = &_cfg->val; 1096 return __rsnd_kctrl_new(mod, rdai, rtd, name, &_cfg->cfg, update); 1097 } 1098 1099 int rsnd_kctrl_new_e(struct rsnd_mod *mod, 1100 struct rsnd_dai *rdai, 1101 struct snd_soc_pcm_runtime *rtd, 1102 const unsigned char *name, 1103 struct rsnd_kctrl_cfg_s *_cfg, 1104 void (*update)(struct rsnd_mod *mod), 1105 const char * const *texts, 1106 u32 max) 1107 { 1108 _cfg->cfg.max = max; 1109 _cfg->cfg.size = 1; 1110 _cfg->cfg.val = &_cfg->val; 1111 _cfg->cfg.texts = texts; 1112 return __rsnd_kctrl_new(mod, rdai, rtd, name, &_cfg->cfg, update); 1113 } 1114 1115 /* 1116 * snd_soc_platform 1117 */ 1118 1119 #define PREALLOC_BUFFER (32 * 1024) 1120 #define PREALLOC_BUFFER_MAX (32 * 1024) 1121 1122 static int rsnd_pcm_new(struct snd_soc_pcm_runtime *rtd) 1123 { 1124 struct snd_soc_dai *dai = rtd->cpu_dai; 1125 struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai); 1126 int ret; 1127 1128 ret = rsnd_dai_call(pcm_new, &rdai->playback, rdai, rtd); 1129 if (ret) 1130 return ret; 1131 1132 ret = rsnd_dai_call(pcm_new, &rdai->capture, rdai, rtd); 1133 if (ret) 1134 return ret; 1135 1136 return snd_pcm_lib_preallocate_pages_for_all( 1137 rtd->pcm, 1138 SNDRV_DMA_TYPE_DEV, 1139 rtd->card->snd_card->dev, 1140 PREALLOC_BUFFER, PREALLOC_BUFFER_MAX); 1141 } 1142 1143 static void rsnd_pcm_free(struct snd_pcm *pcm) 1144 { 1145 snd_pcm_lib_preallocate_free_for_all(pcm); 1146 } 1147 1148 static struct snd_soc_platform_driver rsnd_soc_platform = { 1149 .ops = &rsnd_pcm_ops, 1150 .pcm_new = rsnd_pcm_new, 1151 .pcm_free = rsnd_pcm_free, 1152 }; 1153 1154 static const struct snd_soc_component_driver rsnd_soc_component = { 1155 .name = "rsnd", 1156 }; 1157 1158 static int rsnd_rdai_continuance_probe(struct rsnd_priv *priv, 1159 struct rsnd_dai *rdai, 1160 int is_play) 1161 { 1162 struct rsnd_dai_stream *io = is_play ? &rdai->playback : &rdai->capture; 1163 int ret; 1164 1165 ret = rsnd_dai_call(probe, io, rdai); 1166 if (ret == -EAGAIN) { 1167 /* 1168 * Fallback to PIO mode 1169 */ 1170 1171 /* 1172 * call "remove" for SSI/SRC/DVC 1173 * SSI will be switch to PIO mode if it was DMA mode 1174 * see 1175 * rsnd_dma_init() 1176 * rsnd_ssi_fallback() 1177 */ 1178 rsnd_dai_call(remove, io, rdai); 1179 1180 /* 1181 * remove SRC/DVC from DAI, 1182 */ 1183 rsnd_path_break(priv, io, src); 1184 rsnd_path_break(priv, io, dvc); 1185 1186 /* 1187 * fallback 1188 */ 1189 rsnd_dai_call(fallback, io, rdai); 1190 1191 /* 1192 * retry to "probe". 1193 * DAI has SSI which is PIO mode only now. 1194 */ 1195 ret = rsnd_dai_call(probe, io, rdai); 1196 } 1197 1198 return ret; 1199 } 1200 1201 /* 1202 * rsnd probe 1203 */ 1204 static int rsnd_probe(struct platform_device *pdev) 1205 { 1206 struct rcar_snd_info *info; 1207 struct rsnd_priv *priv; 1208 struct device *dev = &pdev->dev; 1209 struct rsnd_dai *rdai; 1210 const struct of_device_id *of_id = of_match_device(rsnd_of_match, dev); 1211 const struct rsnd_of_data *of_data; 1212 int (*probe_func[])(struct platform_device *pdev, 1213 const struct rsnd_of_data *of_data, 1214 struct rsnd_priv *priv) = { 1215 rsnd_gen_probe, 1216 rsnd_ssi_probe, 1217 rsnd_src_probe, 1218 rsnd_dvc_probe, 1219 rsnd_adg_probe, 1220 rsnd_dai_probe, 1221 }; 1222 int ret, i; 1223 1224 info = NULL; 1225 of_data = NULL; 1226 if (of_id) { 1227 info = devm_kzalloc(&pdev->dev, 1228 sizeof(struct rcar_snd_info), GFP_KERNEL); 1229 of_data = of_id->data; 1230 } else { 1231 info = pdev->dev.platform_data; 1232 } 1233 1234 if (!info) { 1235 dev_err(dev, "driver needs R-Car sound information\n"); 1236 return -ENODEV; 1237 } 1238 1239 /* 1240 * init priv data 1241 */ 1242 priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); 1243 if (!priv) { 1244 dev_err(dev, "priv allocate failed\n"); 1245 return -ENODEV; 1246 } 1247 1248 priv->pdev = pdev; 1249 priv->info = info; 1250 spin_lock_init(&priv->lock); 1251 1252 /* 1253 * init each module 1254 */ 1255 for (i = 0; i < ARRAY_SIZE(probe_func); i++) { 1256 ret = probe_func[i](pdev, of_data, priv); 1257 if (ret) 1258 return ret; 1259 } 1260 1261 for_each_rsnd_dai(rdai, priv, i) { 1262 ret = rsnd_rdai_continuance_probe(priv, rdai, 1); 1263 if (ret) 1264 goto exit_snd_probe; 1265 1266 ret = rsnd_rdai_continuance_probe(priv, rdai, 0); 1267 if (ret) 1268 goto exit_snd_probe; 1269 } 1270 1271 /* 1272 * asoc register 1273 */ 1274 ret = snd_soc_register_platform(dev, &rsnd_soc_platform); 1275 if (ret < 0) { 1276 dev_err(dev, "cannot snd soc register\n"); 1277 return ret; 1278 } 1279 1280 ret = snd_soc_register_component(dev, &rsnd_soc_component, 1281 priv->daidrv, rsnd_rdai_nr(priv)); 1282 if (ret < 0) { 1283 dev_err(dev, "cannot snd dai register\n"); 1284 goto exit_snd_soc; 1285 } 1286 1287 dev_set_drvdata(dev, priv); 1288 1289 pm_runtime_enable(dev); 1290 1291 dev_info(dev, "probed\n"); 1292 return ret; 1293 1294 exit_snd_soc: 1295 snd_soc_unregister_platform(dev); 1296 exit_snd_probe: 1297 for_each_rsnd_dai(rdai, priv, i) { 1298 rsnd_dai_call(remove, &rdai->playback, rdai); 1299 rsnd_dai_call(remove, &rdai->capture, rdai); 1300 } 1301 1302 return ret; 1303 } 1304 1305 static int rsnd_remove(struct platform_device *pdev) 1306 { 1307 struct rsnd_priv *priv = dev_get_drvdata(&pdev->dev); 1308 struct rsnd_dai *rdai; 1309 int ret = 0, i; 1310 1311 pm_runtime_disable(&pdev->dev); 1312 1313 for_each_rsnd_dai(rdai, priv, i) { 1314 ret |= rsnd_dai_call(remove, &rdai->playback, rdai); 1315 ret |= rsnd_dai_call(remove, &rdai->capture, rdai); 1316 } 1317 1318 return ret; 1319 } 1320 1321 static struct platform_driver rsnd_driver = { 1322 .driver = { 1323 .name = "rcar_sound", 1324 .of_match_table = rsnd_of_match, 1325 }, 1326 .probe = rsnd_probe, 1327 .remove = rsnd_remove, 1328 }; 1329 module_platform_driver(rsnd_driver); 1330 1331 MODULE_LICENSE("GPL"); 1332 MODULE_DESCRIPTION("Renesas R-Car audio driver"); 1333 MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>"); 1334 MODULE_ALIAS("platform:rcar-pcm-audio"); 1335