sound/soc/sh/rcar/core.c

   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         cfg.slave_id    = id;
 361         cfg.dst_addr    = 0; /* use default addr when playback */
 362         cfg.src_addr    = 0; /* use default addr when capture */
 363         cfg.direction   = is_play ? DMA_MEM_TO_DEV : DMA_DEV_TO_MEM;
 364
 365         ret = dmaengine_slave_config(dma->chan, &cfg);
 366         if (ret < 0)
 367                 goto rsnd_dma_init_err;
 368
 369         dma->dir = is_play ? DMA_TO_DEVICE : DMA_FROM_DEVICE;
 370         INIT_WORK(&dma->work, rsnd_dma_do_work);
 371
 372         return 0;
 373
 374 rsnd_dma_init_err:
 375         rsnd_dma_quit(priv, dma);
 376
 377         return ret;
 378 }
 379
 380 void  rsnd_dma_quit(struct rsnd_priv *priv,
 381                     struct rsnd_dma *dma)
 382 {
 383         if (dma->chan)
 384                 dma_release_channel(dma->chan);
 385
 386         dma->chan = NULL;
 387 }
 388
 389 /*
 390  *      settting function
 391  */
 392 u32 rsnd_get_adinr(struct rsnd_mod *mod)
 393 {
 394         struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
 395         struct rsnd_dai_stream *io = rsnd_mod_to_io(mod);
 396         struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
 397         struct device *dev = rsnd_priv_to_dev(priv);
 398         u32 adinr = runtime->channels;
 399
 400         switch (runtime->sample_bits) {
 401         case 16:
 402                 adinr |= (8 << 16);
 403                 break;
 404         case 32:
 405                 adinr |= (0 << 16);
 406                 break;
 407         default:
 408                 dev_warn(dev, "not supported sample bits\n");
 409                 return 0;
 410         }
 411
 412         return adinr;
 413 }
 414
 415 /*
 416  *      rsnd_dai functions
 417  */
 418 #define __rsnd_mod_call(mod, func, rdai...)                     \
 419 ({                                                              \
 420         struct rsnd_priv *priv = rsnd_mod_to_priv(mod);         \
 421         struct device *dev = rsnd_priv_to_dev(priv);            \
 422         dev_dbg(dev, "%s [%d] %s\n",                            \
 423                 rsnd_mod_name(mod), rsnd_mod_id(mod), #func);   \
 424         (mod)->ops->func(mod, rdai);                            \
 425 })
 426
 427 #define rsnd_mod_call(mod, func, rdai...)       \
 428         (!(mod) ? -ENODEV :                     \
 429          !((mod)->ops->func) ? 0 :              \
 430          __rsnd_mod_call(mod, func, rdai))
 431
 432 #define rsnd_dai_call(fn, io, rdai...)                          \
 433 ({                                                              \
 434         struct rsnd_mod *mod;                                   \
 435         int ret = 0, i;                                         \
 436         for (i = 0; i < RSND_MOD_MAX; i++) {                    \
 437                 mod = (io)->mod[i];                             \
 438                 if (!mod)                                       \
 439                         continue;                               \
 440                 ret = rsnd_mod_call(mod, fn, rdai);             \
 441                 if (ret < 0)                                    \
 442                         break;                                  \
 443         }                                                       \
 444         ret;                                                    \
 445 })
 446
 447 static int rsnd_dai_connect(struct rsnd_mod *mod,
 448                             struct rsnd_dai_stream *io)
 449 {
 450         if (!mod)
 451                 return -EIO;
 452
 453         if (io->mod[mod->type]) {
 454                 struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
 455                 struct device *dev = rsnd_priv_to_dev(priv);
 456
 457                 dev_err(dev, "%s%d is not empty\n",
 458                         rsnd_mod_name(mod),
 459                         rsnd_mod_id(mod));
 460                 return -EIO;
 461         }
 462
 463         io->mod[mod->type] = mod;
 464         mod->io = io;
 465
 466         return 0;
 467 }
 468
 469 int rsnd_dai_id(struct rsnd_priv *priv, struct rsnd_dai *rdai)
 470 {
 471         int id = rdai - priv->rdai;
 472
 473         if ((id < 0) || (id >= rsnd_rdai_nr(priv)))
 474                 return -EINVAL;
 475
 476         return id;
 477 }
 478
 479 struct rsnd_dai *rsnd_dai_get(struct rsnd_priv *priv, int id)
 480 {
 481         if ((id < 0) || (id >= rsnd_rdai_nr(priv)))
 482                 return NULL;
 483
 484         return priv->rdai + id;
 485 }
 486
 487 static struct rsnd_dai *rsnd_dai_to_rdai(struct snd_soc_dai *dai)
 488 {
 489         struct rsnd_priv *priv = snd_soc_dai_get_drvdata(dai);
 490
 491         return rsnd_dai_get(priv, dai->id);
 492 }
 493
 494 int rsnd_dai_is_play(struct rsnd_dai *rdai, struct rsnd_dai_stream *io)
 495 {
 496         return &rdai->playback == io;
 497 }
 498
 499 /*
 500  *      rsnd_soc_dai functions
 501  */
 502 int rsnd_dai_pointer_offset(struct rsnd_dai_stream *io, int additional)
 503 {
 504         struct snd_pcm_substream *substream = io->substream;
 505         struct snd_pcm_runtime *runtime = substream->runtime;
 506         int pos = io->byte_pos + additional;
 507
 508         pos %= (runtime->periods * io->byte_per_period);
 509
 510         return pos;
 511 }
 512
 513 void rsnd_dai_pointer_update(struct rsnd_dai_stream *io, int byte)
 514 {
 515         io->byte_pos += byte;
 516
 517         if (io->byte_pos >= io->next_period_byte) {
 518                 struct snd_pcm_substream *substream = io->substream;
 519                 struct snd_pcm_runtime *runtime = substream->runtime;
 520
 521                 io->period_pos++;
 522                 io->next_period_byte += io->byte_per_period;
 523
 524                 if (io->period_pos >= runtime->periods) {
 525                         io->byte_pos = 0;
 526                         io->period_pos = 0;
 527                         io->next_period_byte = io->byte_per_period;
 528                 }
 529
 530                 snd_pcm_period_elapsed(substream);
 531         }
 532 }
 533
 534 static int rsnd_dai_stream_init(struct rsnd_dai_stream *io,
 535                                 struct snd_pcm_substream *substream)
 536 {
 537         struct snd_pcm_runtime *runtime = substream->runtime;
 538
 539         io->substream           = substream;
 540         io->byte_pos            = 0;
 541         io->period_pos          = 0;
 542         io->byte_per_period     = runtime->period_size *
 543                                   runtime->channels *
 544                                   samples_to_bytes(runtime, 1);
 545         io->next_period_byte    = io->byte_per_period;
 546
 547         return 0;
 548 }
 549
 550 static
 551 struct snd_soc_dai *rsnd_substream_to_dai(struct snd_pcm_substream *substream)
 552 {
 553         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 554
 555         return  rtd->cpu_dai;
 556 }
 557
 558 static
 559 struct rsnd_dai_stream *rsnd_rdai_to_io(struct rsnd_dai *rdai,
 560                                         struct snd_pcm_substream *substream)
 561 {
 562         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 563                 return &rdai->playback;
 564         else
 565                 return &rdai->capture;
 566 }
 567
 568 static int rsnd_soc_dai_trigger(struct snd_pcm_substream *substream, int cmd,
 569                             struct snd_soc_dai *dai)
 570 {
 571         struct rsnd_priv *priv = snd_soc_dai_get_drvdata(dai);
 572         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
 573         struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream);
 574         int ssi_id = rsnd_mod_id(rsnd_io_to_mod_ssi(io));
 575         int ret;
 576         unsigned long flags;
 577
 578         rsnd_lock(priv, flags);
 579
 580         switch (cmd) {
 581         case SNDRV_PCM_TRIGGER_START:
 582                 ret = rsnd_dai_stream_init(io, substream);
 583                 if (ret < 0)
 584                         goto dai_trigger_end;
 585
 586                 ret = rsnd_platform_call(priv, dai, start, ssi_id);
 587                 if (ret < 0)
 588                         goto dai_trigger_end;
 589
 590                 ret = rsnd_dai_call(init, io, rdai);
 591                 if (ret < 0)
 592                         goto dai_trigger_end;
 593
 594                 ret = rsnd_dai_call(start, io, rdai);
 595                 if (ret < 0)
 596                         goto dai_trigger_end;
 597                 break;
 598         case SNDRV_PCM_TRIGGER_STOP:
 599                 ret = rsnd_dai_call(stop, io, rdai);
 600                 if (ret < 0)
 601                         goto dai_trigger_end;
 602
 603                 ret = rsnd_dai_call(quit, io, rdai);
 604                 if (ret < 0)
 605                         goto dai_trigger_end;
 606
 607                 ret = rsnd_platform_call(priv, dai, stop, ssi_id);
 608                 if (ret < 0)
 609                         goto dai_trigger_end;
 610                 break;
 611         default:
 612                 ret = -EINVAL;
 613         }
 614
 615 dai_trigger_end:
 616         rsnd_unlock(priv, flags);
 617
 618         return ret;
 619 }
 620
 621 static int rsnd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
 622 {
 623         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
 624
 625         /* set master/slave audio interface */
 626         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 627         case SND_SOC_DAIFMT_CBM_CFM:
 628                 rdai->clk_master = 0;
 629                 break;
 630         case SND_SOC_DAIFMT_CBS_CFS:
 631                 rdai->clk_master = 1; /* codec is slave, cpu is master */
 632                 break;
 633         default:
 634                 return -EINVAL;
 635         }
 636
 637         /* set clock inversion */
 638         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
 639         case SND_SOC_DAIFMT_NB_IF:
 640                 rdai->bit_clk_inv = 0;
 641                 rdai->frm_clk_inv = 1;
 642                 break;
 643         case SND_SOC_DAIFMT_IB_NF:
 644                 rdai->bit_clk_inv = 1;
 645                 rdai->frm_clk_inv = 0;
 646                 break;
 647         case SND_SOC_DAIFMT_IB_IF:
 648                 rdai->bit_clk_inv = 1;
 649                 rdai->frm_clk_inv = 1;
 650                 break;
 651         case SND_SOC_DAIFMT_NB_NF:
 652         default:
 653                 rdai->bit_clk_inv = 0;
 654                 rdai->frm_clk_inv = 0;
 655                 break;
 656         }
 657
 658         /* set format */
 659         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 660         case SND_SOC_DAIFMT_I2S:
 661                 rdai->sys_delay = 0;
 662                 rdai->data_alignment = 0;
 663                 break;
 664         case SND_SOC_DAIFMT_LEFT_J:
 665                 rdai->sys_delay = 1;
 666                 rdai->data_alignment = 0;
 667                 break;
 668         case SND_SOC_DAIFMT_RIGHT_J:
 669                 rdai->sys_delay = 1;
 670                 rdai->data_alignment = 1;
 671                 break;
 672         }
 673
 674         return 0;
 675 }
 676
 677 static const struct snd_soc_dai_ops rsnd_soc_dai_ops = {
 678         .trigger        = rsnd_soc_dai_trigger,
 679         .set_fmt        = rsnd_soc_dai_set_fmt,
 680 };
 681
 682 #define rsnd_path_parse(priv, io, type)                         \
 683 ({                                                              \
 684         struct rsnd_mod *mod;                                   \
 685         int ret = 0;                                            \
 686         int id = -1;                                            \
 687                                                                 \
 688         if (rsnd_is_enable_path(io, type)) {                    \
 689                 id = rsnd_info_id(priv, io, type);              \
 690                 if (id >= 0) {                                  \
 691                         mod = rsnd_##type##_mod_get(priv, id);  \
 692                         ret = rsnd_dai_connect(mod, io);        \
 693                 }                                               \
 694         }                                                       \
 695         ret;                                                    \
 696 })
 697
 698 static int rsnd_path_init(struct rsnd_priv *priv,
 699                           struct rsnd_dai *rdai,
 700                           struct rsnd_dai_stream *io)
 701 {
 702         int ret;
 703
 704         /*
 705          * Gen1 is created by SRU/SSI, and this SRU is base module of
 706          * Gen2's SCU/SSIU/SSI. (Gen2 SCU/SSIU came from SRU)
 707          *
 708          * Easy image is..
 709          *      Gen1 SRU = Gen2 SCU + SSIU + etc
 710          *
 711          * Gen2 SCU path is very flexible, but, Gen1 SRU (SCU parts) is
 712          * using fixed path.
 713          */
 714
 715         /* SRC */
 716         ret = rsnd_path_parse(priv, io, src);
 717         if (ret < 0)
 718                 return ret;
 719
 720         /* SSI */
 721         ret = rsnd_path_parse(priv, io, ssi);
 722         if (ret < 0)
 723                 return ret;
 724
 725         /* DVC */
 726         ret = rsnd_path_parse(priv, io, dvc);
 727         if (ret < 0)
 728                 return ret;
 729
 730         return ret;
 731 }
 732
 733 static void rsnd_of_parse_dai(struct platform_device *pdev,
 734                               const struct rsnd_of_data *of_data,
 735                               struct rsnd_priv *priv)
 736 {
 737         struct device_node *dai_node,   *dai_np;
 738         struct device_node *ssi_node,   *ssi_np;
 739         struct device_node *src_node,   *src_np;
 740         struct device_node *playback, *capture;
 741         struct rsnd_dai_platform_info *dai_info;
 742         struct rcar_snd_info *info = rsnd_priv_to_info(priv);
 743         struct device *dev = &pdev->dev;
 744         int nr, i;
 745         int dai_i, ssi_i, src_i;
 746
 747         if (!of_data)
 748                 return;
 749
 750         dai_node = of_get_child_by_name(dev->of_node, "rcar_sound,dai");
 751         if (!dai_node)
 752                 return;
 753
 754         nr = of_get_child_count(dai_node);
 755         if (!nr)
 756                 return;
 757
 758         dai_info = devm_kzalloc(dev,
 759                                 sizeof(struct rsnd_dai_platform_info) * nr,
 760                                 GFP_KERNEL);
 761         if (!dai_info) {
 762                 dev_err(dev, "dai info allocation error\n");
 763                 return;
 764         }
 765
 766         info->dai_info_nr       = nr;
 767         info->dai_info          = dai_info;
 768
 769         ssi_node = of_get_child_by_name(dev->of_node, "rcar_sound,ssi");
 770         src_node = of_get_child_by_name(dev->of_node, "rcar_sound,src");
 771
 772 #define mod_parse(name)                                                 \
 773 if (name##_node) {                                                      \
 774         struct rsnd_##name##_platform_info *name##_info;                \
 775                                                                         \
 776         name##_i = 0;                                                   \
 777         for_each_child_of_node(name##_node, name##_np) {                \
 778                 name##_info = info->name##_info + name##_i;             \
 779                                                                         \
 780                 if (name##_np == playback)                              \
 781                         dai_info->playback.name = name##_info;          \
 782                 if (name##_np == capture)                               \
 783                         dai_info->capture.name = name##_info;           \
 784                                                                         \
 785                 name##_i++;                                             \
 786         }                                                               \
 787 }
 788
 789         /*
 790          * parse all dai
 791          */
 792         dai_i = 0;
 793         for_each_child_of_node(dai_node, dai_np) {
 794                 dai_info = info->dai_info + dai_i;
 795
 796                 for (i = 0;; i++) {
 797
 798                         playback = of_parse_phandle(dai_np, "playback", i);
 799                         capture  = of_parse_phandle(dai_np, "capture", i);
 800
 801                         if (!playback && !capture)
 802                                 break;
 803
 804                         mod_parse(ssi);
 805                         mod_parse(src);
 806
 807                         if (playback)
 808                                 of_node_put(playback);
 809                         if (capture)
 810                                 of_node_put(capture);
 811                 }
 812
 813                 dai_i++;
 814         }
 815 }
 816
 817 static int rsnd_dai_probe(struct platform_device *pdev,
 818                           const struct rsnd_of_data *of_data,
 819                           struct rsnd_priv *priv)
 820 {
 821         struct snd_soc_dai_driver *drv;
 822         struct rcar_snd_info *info = rsnd_priv_to_info(priv);
 823         struct rsnd_dai *rdai;
 824         struct rsnd_ssi_platform_info *pmod, *cmod;
 825         struct device *dev = rsnd_priv_to_dev(priv);
 826         int dai_nr;
 827         int i;
 828
 829         rsnd_of_parse_dai(pdev, of_data, priv);
 830
 831         dai_nr = info->dai_info_nr;
 832         if (!dai_nr) {
 833                 dev_err(dev, "no dai\n");
 834                 return -EIO;
 835         }
 836
 837         drv  = devm_kzalloc(dev, sizeof(*drv)  * dai_nr, GFP_KERNEL);
 838         rdai = devm_kzalloc(dev, sizeof(*rdai) * dai_nr, GFP_KERNEL);
 839         if (!drv || !rdai) {
 840                 dev_err(dev, "dai allocate failed\n");
 841                 return -ENOMEM;
 842         }
 843
 844         priv->rdai_nr   = dai_nr;
 845         priv->daidrv    = drv;
 846         priv->rdai      = rdai;
 847
 848         for (i = 0; i < dai_nr; i++) {
 849                 rdai[i].info = &info->dai_info[i];
 850
 851                 pmod = rdai[i].info->playback.ssi;
 852                 cmod = rdai[i].info->capture.ssi;
 853
 854                 /*
 855                  *      init rsnd_dai
 856                  */
 857                 snprintf(rdai[i].name, RSND_DAI_NAME_SIZE, "rsnd-dai.%d", i);
 858
 859                 /*
 860                  *      init snd_soc_dai_driver
 861                  */
 862                 drv[i].name     = rdai[i].name;
 863                 drv[i].ops      = &rsnd_soc_dai_ops;
 864                 if (pmod) {
 865                         drv[i].playback.rates           = RSND_RATES;
 866                         drv[i].playback.formats         = RSND_FMTS;
 867                         drv[i].playback.channels_min    = 2;
 868                         drv[i].playback.channels_max    = 2;
 869
 870                         rdai[i].playback.info = &info->dai_info[i].playback;
 871                         rsnd_path_init(priv, &rdai[i], &rdai[i].playback);
 872                 }
 873                 if (cmod) {
 874                         drv[i].capture.rates            = RSND_RATES;
 875                         drv[i].capture.formats          = RSND_FMTS;
 876                         drv[i].capture.channels_min     = 2;
 877                         drv[i].capture.channels_max     = 2;
 878
 879                         rdai[i].capture.info = &info->dai_info[i].capture;
 880                         rsnd_path_init(priv, &rdai[i], &rdai[i].capture);
 881                 }
 882
 883                 dev_dbg(dev, "%s (%s/%s)\n", rdai[i].name,
 884                         pmod ? "play"    : " -- ",
 885                         cmod ? "capture" : "  --   ");
 886         }
 887
 888         return 0;
 889 }
 890
 891 /*
 892  *              pcm ops
 893  */
 894 static struct snd_pcm_hardware rsnd_pcm_hardware = {
 895         .info =         SNDRV_PCM_INFO_INTERLEAVED      |
 896                         SNDRV_PCM_INFO_MMAP             |
 897                         SNDRV_PCM_INFO_MMAP_VALID       |
 898                         SNDRV_PCM_INFO_PAUSE,
 899         .buffer_bytes_max       = 64 * 1024,
 900         .period_bytes_min       = 32,
 901         .period_bytes_max       = 8192,
 902         .periods_min            = 1,
 903         .periods_max            = 32,
 904         .fifo_size              = 256,
 905 };
 906
 907 static int rsnd_pcm_open(struct snd_pcm_substream *substream)
 908 {
 909         struct snd_pcm_runtime *runtime = substream->runtime;
 910         int ret = 0;
 911
 912         snd_soc_set_runtime_hwparams(substream, &rsnd_pcm_hardware);
 913
 914         ret = snd_pcm_hw_constraint_integer(runtime,
 915                                             SNDRV_PCM_HW_PARAM_PERIODS);
 916
 917         return ret;
 918 }
 919
 920 static int rsnd_hw_params(struct snd_pcm_substream *substream,
 921                          struct snd_pcm_hw_params *hw_params)
 922 {
 923         return snd_pcm_lib_malloc_pages(substream,
 924                                         params_buffer_bytes(hw_params));
 925 }
 926
 927 static snd_pcm_uframes_t rsnd_pointer(struct snd_pcm_substream *substream)
 928 {
 929         struct snd_pcm_runtime *runtime = substream->runtime;
 930         struct snd_soc_dai *dai = rsnd_substream_to_dai(substream);
 931         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
 932         struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream);
 933
 934         return bytes_to_frames(runtime, io->byte_pos);
 935 }
 936
 937 static struct snd_pcm_ops rsnd_pcm_ops = {
 938         .open           = rsnd_pcm_open,
 939         .ioctl          = snd_pcm_lib_ioctl,
 940         .hw_params      = rsnd_hw_params,
 941         .hw_free        = snd_pcm_lib_free_pages,
 942         .pointer        = rsnd_pointer,
 943 };
 944
 945 /*
 946  *              snd_soc_platform
 947  */
 948
 949 #define PREALLOC_BUFFER         (32 * 1024)
 950 #define PREALLOC_BUFFER_MAX     (32 * 1024)
 951
 952 static int rsnd_pcm_new(struct snd_soc_pcm_runtime *rtd)
 953 {
 954         struct rsnd_priv *priv = snd_soc_dai_get_drvdata(rtd->cpu_dai);
 955         struct rsnd_dai *rdai;
 956         int i, ret;
 957
 958         for_each_rsnd_dai(rdai, priv, i) {
 959                 ret = rsnd_dai_call(pcm_new, &rdai->playback, rdai, rtd);
 960                 if (ret)
 961                         return ret;
 962
 963                 ret = rsnd_dai_call(pcm_new, &rdai->capture, rdai, rtd);
 964                 if (ret)
 965                         return ret;
 966         }
 967
 968         return snd_pcm_lib_preallocate_pages_for_all(
 969                 rtd->pcm,
 970                 SNDRV_DMA_TYPE_DEV,
 971                 rtd->card->snd_card->dev,
 972                 PREALLOC_BUFFER, PREALLOC_BUFFER_MAX);
 973 }
 974
 975 static void rsnd_pcm_free(struct snd_pcm *pcm)
 976 {
 977         snd_pcm_lib_preallocate_free_for_all(pcm);
 978 }
 979
 980 static struct snd_soc_platform_driver rsnd_soc_platform = {
 981         .ops            = &rsnd_pcm_ops,
 982         .pcm_new        = rsnd_pcm_new,
 983         .pcm_free       = rsnd_pcm_free,
 984 };
 985
 986 static const struct snd_soc_component_driver rsnd_soc_component = {
 987         .name           = "rsnd",
 988 };
 989
 990 /*
 991  *      rsnd probe
 992  */
 993 static int rsnd_probe(struct platform_device *pdev)
 994 {
 995         struct rcar_snd_info *info;
 996         struct rsnd_priv *priv;
 997         struct device *dev = &pdev->dev;
 998         struct rsnd_dai *rdai;
 999         const struct of_device_id *of_id = of_match_device(rsnd_of_match, dev);
1000         const struct rsnd_of_data *of_data;
1001         int (*probe_func[])(struct platform_device *pdev,
1002                             const struct rsnd_of_data *of_data,
1003                             struct rsnd_priv *priv) = {
1004                 rsnd_gen_probe,
1005                 rsnd_ssi_probe,
1006                 rsnd_src_probe,
1007                 rsnd_dvc_probe,
1008                 rsnd_adg_probe,
1009                 rsnd_dai_probe,
1010         };
1011         int ret, i;
1012
1013         info = NULL;
1014         of_data = NULL;
1015         if (of_id) {
1016                 info = devm_kzalloc(&pdev->dev,
1017                                     sizeof(struct rcar_snd_info), GFP_KERNEL);
1018                 of_data = of_id->data;
1019         } else {
1020                 info = pdev->dev.platform_data;
1021         }
1022
1023         if (!info) {
1024                 dev_err(dev, "driver needs R-Car sound information\n");
1025                 return -ENODEV;
1026         }
1027
1028         /*
1029          *      init priv data
1030          */
1031         priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
1032         if (!priv) {
1033                 dev_err(dev, "priv allocate failed\n");
1034                 return -ENODEV;
1035         }
1036
1037         priv->pdev      = pdev;
1038         priv->info      = info;
1039         spin_lock_init(&priv->lock);
1040
1041         /*
1042          *      init each module
1043          */
1044         for (i = 0; i < ARRAY_SIZE(probe_func); i++) {
1045                 ret = probe_func[i](pdev, of_data, priv);
1046                 if (ret)
1047                         return ret;
1048         }
1049
1050         for_each_rsnd_dai(rdai, priv, i) {
1051                 ret = rsnd_dai_call(probe, &rdai->playback, rdai);
1052                 if (ret)
1053                         return ret;
1054
1055                 ret = rsnd_dai_call(probe, &rdai->capture, rdai);
1056                 if (ret)
1057                         return ret;
1058         }
1059
1060         /*
1061          *      asoc register
1062          */
1063         ret = snd_soc_register_platform(dev, &rsnd_soc_platform);
1064         if (ret < 0) {
1065                 dev_err(dev, "cannot snd soc register\n");
1066                 return ret;
1067         }
1068
1069         ret = snd_soc_register_component(dev, &rsnd_soc_component,
1070                                          priv->daidrv, rsnd_rdai_nr(priv));
1071         if (ret < 0) {
1072                 dev_err(dev, "cannot snd dai register\n");
1073                 goto exit_snd_soc;
1074         }
1075
1076         dev_set_drvdata(dev, priv);
1077
1078         pm_runtime_enable(dev);
1079
1080         dev_info(dev, "probed\n");
1081         return ret;
1082
1083 exit_snd_soc:
1084         snd_soc_unregister_platform(dev);
1085
1086         return ret;
1087 }
1088
1089 static int rsnd_remove(struct platform_device *pdev)
1090 {
1091         struct rsnd_priv *priv = dev_get_drvdata(&pdev->dev);
1092         struct rsnd_dai *rdai;
1093         int ret, i;
1094
1095         pm_runtime_disable(&pdev->dev);
1096
1097         for_each_rsnd_dai(rdai, priv, i) {
1098                 ret = rsnd_dai_call(remove, &rdai->playback, rdai);
1099                 if (ret)
1100                         return ret;
1101
1102                 ret = rsnd_dai_call(remove, &rdai->capture, rdai);
1103                 if (ret)
1104                         return ret;
1105         }
1106
1107         return 0;
1108 }
1109
1110 static struct platform_driver rsnd_driver = {
1111         .driver = {
1112                 .name   = "rcar_sound",
1113                 .of_match_table = rsnd_of_match,
1114         },
1115         .probe          = rsnd_probe,
1116         .remove         = rsnd_remove,
1117 };
1118 module_platform_driver(rsnd_driver);
1119
1120 MODULE_LICENSE("GPL");
1121 MODULE_DESCRIPTION("Renesas R-Car audio driver");
1122 MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");
1123 MODULE_ALIAS("platform:rcar-pcm-audio");