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_mod *mod, 153 struct rsnd_mod_ops *ops, 154 struct clk *clk, 155 enum rsnd_mod_type type, 156 int id) 157 { 158 mod->id = id; 159 mod->ops = ops; 160 mod->type = type; 161 mod->clk = clk; 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, param...) \ 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, param); \ 426 mod->status = (mod->status & ~mask) | (~call & mask); \ 427 } \ 428 ret; \ 429 }) 430 431 #define rsnd_mod_call(mod, func, param...) \ 432 (!(mod) ? -ENODEV : \ 433 !((mod)->ops->func) ? 0 : \ 434 __rsnd_mod_call(mod, func, param)) 435 436 #define rsnd_dai_call(fn, io, param...) \ 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, param); \ 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 struct rsnd_dai *rsnd_rdai_get(struct rsnd_priv *priv, int id) 481 { 482 if ((id < 0) || (id >= rsnd_rdai_nr(priv))) 483 return NULL; 484 485 return priv->rdai + id; 486 } 487 488 static struct rsnd_dai *rsnd_dai_to_rdai(struct snd_soc_dai *dai) 489 { 490 struct rsnd_priv *priv = snd_soc_dai_get_drvdata(dai); 491 492 return rsnd_rdai_get(priv, dai->id); 493 } 494 495 /* 496 * rsnd_soc_dai functions 497 */ 498 int rsnd_dai_pointer_offset(struct rsnd_dai_stream *io, int additional) 499 { 500 struct snd_pcm_substream *substream = io->substream; 501 struct snd_pcm_runtime *runtime = substream->runtime; 502 int pos = io->byte_pos + additional; 503 504 pos %= (runtime->periods * io->byte_per_period); 505 506 return pos; 507 } 508 509 void rsnd_dai_pointer_update(struct rsnd_dai_stream *io, int byte) 510 { 511 io->byte_pos += byte; 512 513 if (io->byte_pos >= io->next_period_byte) { 514 struct snd_pcm_substream *substream = io->substream; 515 struct snd_pcm_runtime *runtime = substream->runtime; 516 517 io->period_pos++; 518 io->next_period_byte += io->byte_per_period; 519 520 if (io->period_pos >= runtime->periods) { 521 io->byte_pos = 0; 522 io->period_pos = 0; 523 io->next_period_byte = io->byte_per_period; 524 } 525 526 snd_pcm_period_elapsed(substream); 527 } 528 } 529 530 static int rsnd_dai_stream_init(struct rsnd_dai_stream *io, 531 struct snd_pcm_substream *substream) 532 { 533 struct snd_pcm_runtime *runtime = substream->runtime; 534 535 io->substream = substream; 536 io->byte_pos = 0; 537 io->period_pos = 0; 538 io->byte_per_period = runtime->period_size * 539 runtime->channels * 540 samples_to_bytes(runtime, 1); 541 io->next_period_byte = io->byte_per_period; 542 543 return 0; 544 } 545 546 static 547 struct snd_soc_dai *rsnd_substream_to_dai(struct snd_pcm_substream *substream) 548 { 549 struct snd_soc_pcm_runtime *rtd = substream->private_data; 550 551 return rtd->cpu_dai; 552 } 553 554 static 555 struct rsnd_dai_stream *rsnd_rdai_to_io(struct rsnd_dai *rdai, 556 struct snd_pcm_substream *substream) 557 { 558 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 559 return &rdai->playback; 560 else 561 return &rdai->capture; 562 } 563 564 static int rsnd_soc_dai_trigger(struct snd_pcm_substream *substream, int cmd, 565 struct snd_soc_dai *dai) 566 { 567 struct rsnd_priv *priv = snd_soc_dai_get_drvdata(dai); 568 struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai); 569 struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream); 570 int ssi_id = rsnd_mod_id(rsnd_io_to_mod_ssi(io)); 571 int ret; 572 unsigned long flags; 573 574 rsnd_lock(priv, flags); 575 576 switch (cmd) { 577 case SNDRV_PCM_TRIGGER_START: 578 ret = rsnd_dai_stream_init(io, substream); 579 if (ret < 0) 580 goto dai_trigger_end; 581 582 ret = rsnd_platform_call(priv, dai, start, ssi_id); 583 if (ret < 0) 584 goto dai_trigger_end; 585 586 ret = rsnd_dai_call(init, io, priv); 587 if (ret < 0) 588 goto dai_trigger_end; 589 590 ret = rsnd_dai_call(start, io, priv); 591 if (ret < 0) 592 goto dai_trigger_end; 593 break; 594 case SNDRV_PCM_TRIGGER_STOP: 595 ret = rsnd_dai_call(stop, io, priv); 596 if (ret < 0) 597 goto dai_trigger_end; 598 599 ret = rsnd_dai_call(quit, io, priv); 600 if (ret < 0) 601 goto dai_trigger_end; 602 603 ret = rsnd_platform_call(priv, dai, stop, ssi_id); 604 if (ret < 0) 605 goto dai_trigger_end; 606 break; 607 default: 608 ret = -EINVAL; 609 } 610 611 dai_trigger_end: 612 rsnd_unlock(priv, flags); 613 614 return ret; 615 } 616 617 static int rsnd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt) 618 { 619 struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai); 620 621 /* set master/slave audio interface */ 622 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { 623 case SND_SOC_DAIFMT_CBM_CFM: 624 rdai->clk_master = 0; 625 break; 626 case SND_SOC_DAIFMT_CBS_CFS: 627 rdai->clk_master = 1; /* codec is slave, cpu is master */ 628 break; 629 default: 630 return -EINVAL; 631 } 632 633 /* set format */ 634 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { 635 case SND_SOC_DAIFMT_I2S: 636 rdai->sys_delay = 0; 637 rdai->data_alignment = 0; 638 rdai->frm_clk_inv = 0; 639 break; 640 case SND_SOC_DAIFMT_LEFT_J: 641 rdai->sys_delay = 1; 642 rdai->data_alignment = 0; 643 rdai->frm_clk_inv = 1; 644 break; 645 case SND_SOC_DAIFMT_RIGHT_J: 646 rdai->sys_delay = 1; 647 rdai->data_alignment = 1; 648 rdai->frm_clk_inv = 1; 649 break; 650 } 651 652 /* set clock inversion */ 653 switch (fmt & SND_SOC_DAIFMT_INV_MASK) { 654 case SND_SOC_DAIFMT_NB_IF: 655 rdai->bit_clk_inv = rdai->bit_clk_inv; 656 rdai->frm_clk_inv = !rdai->frm_clk_inv; 657 break; 658 case SND_SOC_DAIFMT_IB_NF: 659 rdai->bit_clk_inv = !rdai->bit_clk_inv; 660 rdai->frm_clk_inv = rdai->frm_clk_inv; 661 break; 662 case SND_SOC_DAIFMT_IB_IF: 663 rdai->bit_clk_inv = !rdai->bit_clk_inv; 664 rdai->frm_clk_inv = !rdai->frm_clk_inv; 665 break; 666 case SND_SOC_DAIFMT_NB_NF: 667 default: 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 #define rsnd_path_break(priv, io, type) \ 696 { \ 697 struct rsnd_mod *mod; \ 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 rsnd_dai_disconnect(mod, io); \ 705 } \ 706 } \ 707 } 708 709 static int rsnd_path_init(struct rsnd_priv *priv, 710 struct rsnd_dai *rdai, 711 struct rsnd_dai_stream *io) 712 { 713 int ret; 714 715 /* 716 * Gen1 is created by SRU/SSI, and this SRU is base module of 717 * Gen2's SCU/SSIU/SSI. (Gen2 SCU/SSIU came from SRU) 718 * 719 * Easy image is.. 720 * Gen1 SRU = Gen2 SCU + SSIU + etc 721 * 722 * Gen2 SCU path is very flexible, but, Gen1 SRU (SCU parts) is 723 * using fixed path. 724 */ 725 726 /* SRC */ 727 ret = rsnd_path_parse(priv, io, src); 728 if (ret < 0) 729 return ret; 730 731 /* SSI */ 732 ret = rsnd_path_parse(priv, io, ssi); 733 if (ret < 0) 734 return ret; 735 736 /* DVC */ 737 ret = rsnd_path_parse(priv, io, dvc); 738 if (ret < 0) 739 return ret; 740 741 return ret; 742 } 743 744 static void rsnd_of_parse_dai(struct platform_device *pdev, 745 const struct rsnd_of_data *of_data, 746 struct rsnd_priv *priv) 747 { 748 struct device_node *dai_node, *dai_np; 749 struct device_node *ssi_node, *ssi_np; 750 struct device_node *src_node, *src_np; 751 struct device_node *dvc_node, *dvc_np; 752 struct device_node *playback, *capture; 753 struct rsnd_dai_platform_info *dai_info; 754 struct rcar_snd_info *info = rsnd_priv_to_info(priv); 755 struct device *dev = &pdev->dev; 756 int nr, i; 757 int dai_i, ssi_i, src_i, dvc_i; 758 759 if (!of_data) 760 return; 761 762 dai_node = of_get_child_by_name(dev->of_node, "rcar_sound,dai"); 763 if (!dai_node) 764 return; 765 766 nr = of_get_child_count(dai_node); 767 if (!nr) 768 return; 769 770 dai_info = devm_kzalloc(dev, 771 sizeof(struct rsnd_dai_platform_info) * nr, 772 GFP_KERNEL); 773 if (!dai_info) { 774 dev_err(dev, "dai info allocation error\n"); 775 return; 776 } 777 778 info->dai_info_nr = nr; 779 info->dai_info = dai_info; 780 781 ssi_node = of_get_child_by_name(dev->of_node, "rcar_sound,ssi"); 782 src_node = of_get_child_by_name(dev->of_node, "rcar_sound,src"); 783 dvc_node = of_get_child_by_name(dev->of_node, "rcar_sound,dvc"); 784 785 #define mod_parse(name) \ 786 if (name##_node) { \ 787 struct rsnd_##name##_platform_info *name##_info; \ 788 \ 789 name##_i = 0; \ 790 for_each_child_of_node(name##_node, name##_np) { \ 791 name##_info = info->name##_info + name##_i; \ 792 \ 793 if (name##_np == playback) \ 794 dai_info->playback.name = name##_info; \ 795 if (name##_np == capture) \ 796 dai_info->capture.name = name##_info; \ 797 \ 798 name##_i++; \ 799 } \ 800 } 801 802 /* 803 * parse all dai 804 */ 805 dai_i = 0; 806 for_each_child_of_node(dai_node, dai_np) { 807 dai_info = info->dai_info + dai_i; 808 809 for (i = 0;; i++) { 810 811 playback = of_parse_phandle(dai_np, "playback", i); 812 capture = of_parse_phandle(dai_np, "capture", i); 813 814 if (!playback && !capture) 815 break; 816 817 mod_parse(ssi); 818 mod_parse(src); 819 mod_parse(dvc); 820 821 of_node_put(playback); 822 of_node_put(capture); 823 } 824 825 dai_i++; 826 } 827 } 828 829 static int rsnd_dai_probe(struct platform_device *pdev, 830 const struct rsnd_of_data *of_data, 831 struct rsnd_priv *priv) 832 { 833 struct snd_soc_dai_driver *drv; 834 struct rcar_snd_info *info = rsnd_priv_to_info(priv); 835 struct rsnd_dai *rdai; 836 struct rsnd_ssi_platform_info *pmod, *cmod; 837 struct device *dev = rsnd_priv_to_dev(priv); 838 int dai_nr; 839 int i; 840 841 rsnd_of_parse_dai(pdev, of_data, priv); 842 843 dai_nr = info->dai_info_nr; 844 if (!dai_nr) { 845 dev_err(dev, "no dai\n"); 846 return -EIO; 847 } 848 849 drv = devm_kzalloc(dev, sizeof(*drv) * dai_nr, GFP_KERNEL); 850 rdai = devm_kzalloc(dev, sizeof(*rdai) * dai_nr, GFP_KERNEL); 851 if (!drv || !rdai) { 852 dev_err(dev, "dai allocate failed\n"); 853 return -ENOMEM; 854 } 855 856 priv->rdai_nr = dai_nr; 857 priv->daidrv = drv; 858 priv->rdai = rdai; 859 860 for (i = 0; i < dai_nr; i++) { 861 862 pmod = info->dai_info[i].playback.ssi; 863 cmod = info->dai_info[i].capture.ssi; 864 865 /* 866 * init rsnd_dai 867 */ 868 snprintf(rdai[i].name, RSND_DAI_NAME_SIZE, "rsnd-dai.%d", i); 869 rdai[i].priv = priv; 870 871 /* 872 * init snd_soc_dai_driver 873 */ 874 drv[i].name = rdai[i].name; 875 drv[i].ops = &rsnd_soc_dai_ops; 876 if (pmod) { 877 drv[i].playback.rates = RSND_RATES; 878 drv[i].playback.formats = RSND_FMTS; 879 drv[i].playback.channels_min = 2; 880 drv[i].playback.channels_max = 2; 881 882 rdai[i].playback.info = &info->dai_info[i].playback; 883 rdai[i].playback.rdai = rdai + i; 884 rsnd_path_init(priv, &rdai[i], &rdai[i].playback); 885 } 886 if (cmod) { 887 drv[i].capture.rates = RSND_RATES; 888 drv[i].capture.formats = RSND_FMTS; 889 drv[i].capture.channels_min = 2; 890 drv[i].capture.channels_max = 2; 891 892 rdai[i].capture.info = &info->dai_info[i].capture; 893 rdai[i].capture.rdai = rdai + i; 894 rsnd_path_init(priv, &rdai[i], &rdai[i].capture); 895 } 896 897 dev_dbg(dev, "%s (%s/%s)\n", rdai[i].name, 898 pmod ? "play" : " -- ", 899 cmod ? "capture" : " -- "); 900 } 901 902 return 0; 903 } 904 905 /* 906 * pcm ops 907 */ 908 static struct snd_pcm_hardware rsnd_pcm_hardware = { 909 .info = SNDRV_PCM_INFO_INTERLEAVED | 910 SNDRV_PCM_INFO_MMAP | 911 SNDRV_PCM_INFO_MMAP_VALID, 912 .buffer_bytes_max = 64 * 1024, 913 .period_bytes_min = 32, 914 .period_bytes_max = 8192, 915 .periods_min = 1, 916 .periods_max = 32, 917 .fifo_size = 256, 918 }; 919 920 static int rsnd_pcm_open(struct snd_pcm_substream *substream) 921 { 922 struct snd_pcm_runtime *runtime = substream->runtime; 923 int ret = 0; 924 925 snd_soc_set_runtime_hwparams(substream, &rsnd_pcm_hardware); 926 927 ret = snd_pcm_hw_constraint_integer(runtime, 928 SNDRV_PCM_HW_PARAM_PERIODS); 929 930 return ret; 931 } 932 933 static int rsnd_hw_params(struct snd_pcm_substream *substream, 934 struct snd_pcm_hw_params *hw_params) 935 { 936 return snd_pcm_lib_malloc_pages(substream, 937 params_buffer_bytes(hw_params)); 938 } 939 940 static snd_pcm_uframes_t rsnd_pointer(struct snd_pcm_substream *substream) 941 { 942 struct snd_pcm_runtime *runtime = substream->runtime; 943 struct snd_soc_dai *dai = rsnd_substream_to_dai(substream); 944 struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai); 945 struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream); 946 947 return bytes_to_frames(runtime, io->byte_pos); 948 } 949 950 static struct snd_pcm_ops rsnd_pcm_ops = { 951 .open = rsnd_pcm_open, 952 .ioctl = snd_pcm_lib_ioctl, 953 .hw_params = rsnd_hw_params, 954 .hw_free = snd_pcm_lib_free_pages, 955 .pointer = rsnd_pointer, 956 }; 957 958 /* 959 * snd_kcontrol 960 */ 961 #define kcontrol_to_cfg(kctrl) ((struct rsnd_kctrl_cfg *)kctrl->private_value) 962 static int rsnd_kctrl_info(struct snd_kcontrol *kctrl, 963 struct snd_ctl_elem_info *uinfo) 964 { 965 struct rsnd_kctrl_cfg *cfg = kcontrol_to_cfg(kctrl); 966 967 if (cfg->texts) { 968 uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED; 969 uinfo->count = cfg->size; 970 uinfo->value.enumerated.items = cfg->max; 971 if (uinfo->value.enumerated.item >= cfg->max) 972 uinfo->value.enumerated.item = cfg->max - 1; 973 strlcpy(uinfo->value.enumerated.name, 974 cfg->texts[uinfo->value.enumerated.item], 975 sizeof(uinfo->value.enumerated.name)); 976 } else { 977 uinfo->count = cfg->size; 978 uinfo->value.integer.min = 0; 979 uinfo->value.integer.max = cfg->max; 980 uinfo->type = (cfg->max == 1) ? 981 SNDRV_CTL_ELEM_TYPE_BOOLEAN : 982 SNDRV_CTL_ELEM_TYPE_INTEGER; 983 } 984 985 return 0; 986 } 987 988 static int rsnd_kctrl_get(struct snd_kcontrol *kctrl, 989 struct snd_ctl_elem_value *uc) 990 { 991 struct rsnd_kctrl_cfg *cfg = kcontrol_to_cfg(kctrl); 992 int i; 993 994 for (i = 0; i < cfg->size; i++) 995 if (cfg->texts) 996 uc->value.enumerated.item[i] = cfg->val[i]; 997 else 998 uc->value.integer.value[i] = cfg->val[i]; 999 1000 return 0; 1001 } 1002 1003 static int rsnd_kctrl_put(struct snd_kcontrol *kctrl, 1004 struct snd_ctl_elem_value *uc) 1005 { 1006 struct rsnd_mod *mod = snd_kcontrol_chip(kctrl); 1007 struct rsnd_kctrl_cfg *cfg = kcontrol_to_cfg(kctrl); 1008 int i, change = 0; 1009 1010 for (i = 0; i < cfg->size; i++) { 1011 if (cfg->texts) { 1012 change |= (uc->value.enumerated.item[i] != cfg->val[i]); 1013 cfg->val[i] = uc->value.enumerated.item[i]; 1014 } else { 1015 change |= (uc->value.integer.value[i] != cfg->val[i]); 1016 cfg->val[i] = uc->value.integer.value[i]; 1017 } 1018 } 1019 1020 if (change) 1021 cfg->update(mod); 1022 1023 return change; 1024 } 1025 1026 static int __rsnd_kctrl_new(struct rsnd_mod *mod, 1027 struct snd_soc_pcm_runtime *rtd, 1028 const unsigned char *name, 1029 struct rsnd_kctrl_cfg *cfg, 1030 void (*update)(struct rsnd_mod *mod)) 1031 { 1032 struct snd_card *card = rtd->card->snd_card; 1033 struct snd_kcontrol *kctrl; 1034 struct snd_kcontrol_new knew = { 1035 .iface = SNDRV_CTL_ELEM_IFACE_MIXER, 1036 .name = name, 1037 .info = rsnd_kctrl_info, 1038 .get = rsnd_kctrl_get, 1039 .put = rsnd_kctrl_put, 1040 .private_value = (unsigned long)cfg, 1041 }; 1042 int ret; 1043 1044 kctrl = snd_ctl_new1(&knew, mod); 1045 if (!kctrl) 1046 return -ENOMEM; 1047 1048 ret = snd_ctl_add(card, kctrl); 1049 if (ret < 0) { 1050 snd_ctl_free_one(kctrl); 1051 return ret; 1052 } 1053 1054 cfg->update = update; 1055 cfg->card = card; 1056 cfg->kctrl = kctrl; 1057 1058 return 0; 1059 } 1060 1061 void _rsnd_kctrl_remove(struct rsnd_kctrl_cfg *cfg) 1062 { 1063 snd_ctl_remove(cfg->card, cfg->kctrl); 1064 } 1065 1066 int rsnd_kctrl_new_m(struct rsnd_mod *mod, 1067 struct snd_soc_pcm_runtime *rtd, 1068 const unsigned char *name, 1069 void (*update)(struct rsnd_mod *mod), 1070 struct rsnd_kctrl_cfg_m *_cfg, 1071 u32 max) 1072 { 1073 _cfg->cfg.max = max; 1074 _cfg->cfg.size = RSND_DVC_CHANNELS; 1075 _cfg->cfg.val = _cfg->val; 1076 return __rsnd_kctrl_new(mod, rtd, name, &_cfg->cfg, update); 1077 } 1078 1079 int rsnd_kctrl_new_s(struct rsnd_mod *mod, 1080 struct snd_soc_pcm_runtime *rtd, 1081 const unsigned char *name, 1082 void (*update)(struct rsnd_mod *mod), 1083 struct rsnd_kctrl_cfg_s *_cfg, 1084 u32 max) 1085 { 1086 _cfg->cfg.max = max; 1087 _cfg->cfg.size = 1; 1088 _cfg->cfg.val = &_cfg->val; 1089 return __rsnd_kctrl_new(mod, rtd, name, &_cfg->cfg, update); 1090 } 1091 1092 int rsnd_kctrl_new_e(struct rsnd_mod *mod, 1093 struct snd_soc_pcm_runtime *rtd, 1094 const unsigned char *name, 1095 struct rsnd_kctrl_cfg_s *_cfg, 1096 void (*update)(struct rsnd_mod *mod), 1097 const char * const *texts, 1098 u32 max) 1099 { 1100 _cfg->cfg.max = max; 1101 _cfg->cfg.size = 1; 1102 _cfg->cfg.val = &_cfg->val; 1103 _cfg->cfg.texts = texts; 1104 return __rsnd_kctrl_new(mod, rtd, name, &_cfg->cfg, update); 1105 } 1106 1107 /* 1108 * snd_soc_platform 1109 */ 1110 1111 #define PREALLOC_BUFFER (32 * 1024) 1112 #define PREALLOC_BUFFER_MAX (32 * 1024) 1113 1114 static int rsnd_pcm_new(struct snd_soc_pcm_runtime *rtd) 1115 { 1116 struct snd_soc_dai *dai = rtd->cpu_dai; 1117 struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai); 1118 int ret; 1119 1120 ret = rsnd_dai_call(pcm_new, &rdai->playback, rtd); 1121 if (ret) 1122 return ret; 1123 1124 ret = rsnd_dai_call(pcm_new, &rdai->capture, rtd); 1125 if (ret) 1126 return ret; 1127 1128 return snd_pcm_lib_preallocate_pages_for_all( 1129 rtd->pcm, 1130 SNDRV_DMA_TYPE_DEV, 1131 rtd->card->snd_card->dev, 1132 PREALLOC_BUFFER, PREALLOC_BUFFER_MAX); 1133 } 1134 1135 static struct snd_soc_platform_driver rsnd_soc_platform = { 1136 .ops = &rsnd_pcm_ops, 1137 .pcm_new = rsnd_pcm_new, 1138 }; 1139 1140 static const struct snd_soc_component_driver rsnd_soc_component = { 1141 .name = "rsnd", 1142 }; 1143 1144 static int rsnd_rdai_continuance_probe(struct rsnd_priv *priv, 1145 struct rsnd_dai_stream *io) 1146 { 1147 int ret; 1148 1149 ret = rsnd_dai_call(probe, io, priv); 1150 if (ret == -EAGAIN) { 1151 /* 1152 * Fallback to PIO mode 1153 */ 1154 1155 /* 1156 * call "remove" for SSI/SRC/DVC 1157 * SSI will be switch to PIO mode if it was DMA mode 1158 * see 1159 * rsnd_dma_init() 1160 * rsnd_ssi_fallback() 1161 */ 1162 rsnd_dai_call(remove, io, priv); 1163 1164 /* 1165 * remove SRC/DVC from DAI, 1166 */ 1167 rsnd_path_break(priv, io, src); 1168 rsnd_path_break(priv, io, dvc); 1169 1170 /* 1171 * fallback 1172 */ 1173 rsnd_dai_call(fallback, io, priv); 1174 1175 /* 1176 * retry to "probe". 1177 * DAI has SSI which is PIO mode only now. 1178 */ 1179 ret = rsnd_dai_call(probe, io, priv); 1180 } 1181 1182 return ret; 1183 } 1184 1185 /* 1186 * rsnd probe 1187 */ 1188 static int rsnd_probe(struct platform_device *pdev) 1189 { 1190 struct rcar_snd_info *info; 1191 struct rsnd_priv *priv; 1192 struct device *dev = &pdev->dev; 1193 struct rsnd_dai *rdai; 1194 const struct of_device_id *of_id = of_match_device(rsnd_of_match, dev); 1195 const struct rsnd_of_data *of_data; 1196 int (*probe_func[])(struct platform_device *pdev, 1197 const struct rsnd_of_data *of_data, 1198 struct rsnd_priv *priv) = { 1199 rsnd_gen_probe, 1200 rsnd_ssi_probe, 1201 rsnd_src_probe, 1202 rsnd_dvc_probe, 1203 rsnd_adg_probe, 1204 rsnd_dai_probe, 1205 }; 1206 int ret, i; 1207 1208 info = NULL; 1209 of_data = NULL; 1210 if (of_id) { 1211 info = devm_kzalloc(&pdev->dev, 1212 sizeof(struct rcar_snd_info), GFP_KERNEL); 1213 of_data = of_id->data; 1214 } else { 1215 info = pdev->dev.platform_data; 1216 } 1217 1218 if (!info) { 1219 dev_err(dev, "driver needs R-Car sound information\n"); 1220 return -ENODEV; 1221 } 1222 1223 /* 1224 * init priv data 1225 */ 1226 priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); 1227 if (!priv) { 1228 dev_err(dev, "priv allocate failed\n"); 1229 return -ENODEV; 1230 } 1231 1232 priv->pdev = pdev; 1233 priv->info = info; 1234 spin_lock_init(&priv->lock); 1235 1236 /* 1237 * init each module 1238 */ 1239 for (i = 0; i < ARRAY_SIZE(probe_func); i++) { 1240 ret = probe_func[i](pdev, of_data, priv); 1241 if (ret) 1242 return ret; 1243 } 1244 1245 for_each_rsnd_dai(rdai, priv, i) { 1246 ret = rsnd_rdai_continuance_probe(priv, &rdai->playback); 1247 if (ret) 1248 goto exit_snd_probe; 1249 1250 ret = rsnd_rdai_continuance_probe(priv, &rdai->capture); 1251 if (ret) 1252 goto exit_snd_probe; 1253 } 1254 1255 dev_set_drvdata(dev, priv); 1256 1257 /* 1258 * asoc register 1259 */ 1260 ret = snd_soc_register_platform(dev, &rsnd_soc_platform); 1261 if (ret < 0) { 1262 dev_err(dev, "cannot snd soc register\n"); 1263 return ret; 1264 } 1265 1266 ret = snd_soc_register_component(dev, &rsnd_soc_component, 1267 priv->daidrv, rsnd_rdai_nr(priv)); 1268 if (ret < 0) { 1269 dev_err(dev, "cannot snd dai register\n"); 1270 goto exit_snd_soc; 1271 } 1272 1273 pm_runtime_enable(dev); 1274 1275 dev_info(dev, "probed\n"); 1276 return ret; 1277 1278 exit_snd_soc: 1279 snd_soc_unregister_platform(dev); 1280 exit_snd_probe: 1281 for_each_rsnd_dai(rdai, priv, i) { 1282 rsnd_dai_call(remove, &rdai->playback, priv); 1283 rsnd_dai_call(remove, &rdai->capture, priv); 1284 } 1285 1286 return ret; 1287 } 1288 1289 static int rsnd_remove(struct platform_device *pdev) 1290 { 1291 struct rsnd_priv *priv = dev_get_drvdata(&pdev->dev); 1292 struct rsnd_dai *rdai; 1293 int ret = 0, i; 1294 1295 pm_runtime_disable(&pdev->dev); 1296 1297 for_each_rsnd_dai(rdai, priv, i) { 1298 ret |= rsnd_dai_call(remove, &rdai->playback, priv); 1299 ret |= rsnd_dai_call(remove, &rdai->capture, priv); 1300 } 1301 1302 snd_soc_unregister_component(&pdev->dev); 1303 snd_soc_unregister_platform(&pdev->dev); 1304 1305 return ret; 1306 } 1307 1308 static struct platform_driver rsnd_driver = { 1309 .driver = { 1310 .name = "rcar_sound", 1311 .of_match_table = rsnd_of_match, 1312 }, 1313 .probe = rsnd_probe, 1314 .remove = rsnd_remove, 1315 }; 1316 module_platform_driver(rsnd_driver); 1317 1318 MODULE_LICENSE("GPL"); 1319 MODULE_DESCRIPTION("Renesas R-Car audio driver"); 1320 MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>"); 1321 MODULE_ALIAS("platform:rcar-pcm-audio"); 1322