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 /*
 104  *      rsnd_platform functions
 105  */
 106 #define rsnd_platform_call(priv, dai, func, param...)   \
 107         (!(priv->info->func) ? 0 :              \
 108          priv->info->func(param))
 109
 110 #define rsnd_is_enable_path(io, name) \
 111         ((io)->info ? (io)->info->name : NULL)
 112 #define rsnd_info_id(priv, io, name) \
 113         ((io)->info->name - priv->info->name##_info)
 114
 115 /*
 116  *      rsnd_mod functions
 117  */
 118 char *rsnd_mod_name(struct rsnd_mod *mod)
 119 {
 120         if (!mod || !mod->ops)
 121                 return "unknown";
 122
 123         return mod->ops->name;
 124 }
 125
 126 void rsnd_mod_init(struct rsnd_priv *priv,
 127                    struct rsnd_mod *mod,
 128                    struct rsnd_mod_ops *ops,
 129                    enum rsnd_mod_type type,
 130                    int id)
 131 {
 132         mod->priv       = priv;
 133         mod->id         = id;
 134         mod->ops        = ops;
 135         mod->type       = type;
 136 }
 137
 138 /*
 139  *      rsnd_dma functions
 140  */
 141 static void __rsnd_dma_start(struct rsnd_dma *dma);
 142 static void rsnd_dma_continue(struct rsnd_dma *dma)
 143 {
 144         /* push next A or B plane */
 145         dma->submit_loop = 1;
 146         schedule_work(&dma->work);
 147 }
 148
 149 void rsnd_dma_start(struct rsnd_dma *dma)
 150 {
 151         /* push both A and B plane*/
 152         dma->offset = 0;
 153         dma->submit_loop = 2;
 154         __rsnd_dma_start(dma);
 155 }
 156
 157 void rsnd_dma_stop(struct rsnd_dma *dma)
 158 {
 159         dma->submit_loop = 0;
 160         cancel_work_sync(&dma->work);
 161         dmaengine_terminate_all(dma->chan);
 162 }
 163
 164 static void rsnd_dma_complete(void *data)
 165 {
 166         struct rsnd_dma *dma = (struct rsnd_dma *)data;
 167         struct rsnd_mod *mod = rsnd_dma_to_mod(dma);
 168         struct rsnd_priv *priv = rsnd_mod_to_priv(rsnd_dma_to_mod(dma));
 169         struct rsnd_dai_stream *io = rsnd_mod_to_io(mod);
 170         unsigned long flags;
 171
 172         rsnd_lock(priv, flags);
 173
 174         /*
 175          * Renesas sound Gen1 needs 1 DMAC,
 176          * Gen2 needs 2 DMAC.
 177          * In Gen2 case, it are Audio-DMAC, and Audio-DMAC-peri-peri.
 178          * But, Audio-DMAC-peri-peri doesn't have interrupt,
 179          * and this driver is assuming that here.
 180          *
 181          * If Audio-DMAC-peri-peri has interrpt,
 182          * rsnd_dai_pointer_update() will be called twice,
 183          * ant it will breaks io->byte_pos
 184          */
 185
 186         rsnd_dai_pointer_update(io, io->byte_per_period);
 187
 188         if (dma->submit_loop)
 189                 rsnd_dma_continue(dma);
 190
 191         rsnd_unlock(priv, flags);
 192 }
 193
 194 static void __rsnd_dma_start(struct rsnd_dma *dma)
 195 {
 196         struct rsnd_mod *mod = rsnd_dma_to_mod(dma);
 197         struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
 198         struct rsnd_dai_stream *io = rsnd_mod_to_io(mod);
 199         struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
 200         struct device *dev = rsnd_priv_to_dev(priv);
 201         struct dma_async_tx_descriptor *desc;
 202         dma_addr_t buf;
 203         size_t len = io->byte_per_period;
 204         int i;
 205
 206         for (i = 0; i < dma->submit_loop; i++) {
 207
 208                 buf = runtime->dma_addr +
 209                         rsnd_dai_pointer_offset(io, dma->offset + len);
 210                 dma->offset = len;
 211
 212                 desc = dmaengine_prep_slave_single(
 213                         dma->chan, buf, len, dma->dir,
 214                         DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
 215                 if (!desc) {
 216                         dev_err(dev, "dmaengine_prep_slave_sg() fail\n");
 217                         return;
 218                 }
 219
 220                 desc->callback          = rsnd_dma_complete;
 221                 desc->callback_param    = dma;
 222
 223                 if (dmaengine_submit(desc) < 0) {
 224                         dev_err(dev, "dmaengine_submit() fail\n");
 225                         return;
 226                 }
 227
 228                 dma_async_issue_pending(dma->chan);
 229         }
 230 }
 231
 232 static void rsnd_dma_do_work(struct work_struct *work)
 233 {
 234         struct rsnd_dma *dma = container_of(work, struct rsnd_dma, work);
 235
 236         __rsnd_dma_start(dma);
 237 }
 238
 239 int rsnd_dma_available(struct rsnd_dma *dma)
 240 {
 241         return !!dma->chan;
 242 }
 243
 244 int rsnd_dma_init(struct rsnd_priv *priv, struct rsnd_dma *dma,
 245                   int is_play, int id)
 246 {
 247         struct device *dev = rsnd_priv_to_dev(priv);
 248         struct dma_slave_config cfg;
 249         dma_cap_mask_t mask;
 250         int ret;
 251
 252         if (dma->chan) {
 253                 dev_err(dev, "it already has dma channel\n");
 254                 return -EIO;
 255         }
 256
 257         dma_cap_zero(mask);
 258         dma_cap_set(DMA_SLAVE, mask);
 259
 260         dma->chan = dma_request_slave_channel_compat(mask, shdma_chan_filter,
 261                                                      (void *)id, dev,
 262                                                      is_play ? "tx" : "rx");
 263         if (!dma->chan) {
 264                 dev_err(dev, "can't get dma channel\n");
 265                 return -EIO;
 266         }
 267
 268         cfg.slave_id    = id;
 269         cfg.dst_addr    = 0; /* use default addr when playback */
 270         cfg.src_addr    = 0; /* use default addr when capture */
 271         cfg.direction   = is_play ? DMA_MEM_TO_DEV : DMA_DEV_TO_MEM;
 272
 273         ret = dmaengine_slave_config(dma->chan, &cfg);
 274         if (ret < 0)
 275                 goto rsnd_dma_init_err;
 276
 277         dma->dir = is_play ? DMA_TO_DEVICE : DMA_FROM_DEVICE;
 278         INIT_WORK(&dma->work, rsnd_dma_do_work);
 279
 280         return 0;
 281
 282 rsnd_dma_init_err:
 283         rsnd_dma_quit(priv, dma);
 284
 285         return ret;
 286 }
 287
 288 void  rsnd_dma_quit(struct rsnd_priv *priv,
 289                     struct rsnd_dma *dma)
 290 {
 291         if (dma->chan)
 292                 dma_release_channel(dma->chan);
 293
 294         dma->chan = NULL;
 295 }
 296
 297 /*
 298  *      rsnd_dai functions
 299  */
 300 #define __rsnd_mod_call(mod, func, rdai, io)                    \
 301 ({                                                              \
 302         struct rsnd_priv *priv = rsnd_mod_to_priv(mod);         \
 303         struct device *dev = rsnd_priv_to_dev(priv);            \
 304         dev_dbg(dev, "%s [%d] %s\n",                            \
 305                 rsnd_mod_name(mod), rsnd_mod_id(mod), #func);   \
 306         (mod)->ops->func(mod, rdai, io);                        \
 307 })
 308
 309 #define rsnd_mod_call(mod, func, rdai, io)      \
 310         (!(mod) ? -ENODEV :                     \
 311          !((mod)->ops->func) ? 0 :              \
 312          __rsnd_mod_call(mod, func, (rdai), (io)))
 313
 314 #define rsnd_dai_call(rdai, io, fn)                             \
 315 ({                                                              \
 316         struct rsnd_mod *mod;                                   \
 317         int ret = 0, i;                                         \
 318         for (i = 0; i < RSND_MOD_MAX; i++) {                    \
 319                 mod = (io)->mod[i];                             \
 320                 if (!mod)                                       \
 321                         continue;                               \
 322                 ret = rsnd_mod_call(mod, fn, (rdai), (io));     \
 323                 if (ret < 0)                                    \
 324                         break;                                  \
 325         }                                                       \
 326         ret;                                                    \
 327 })
 328
 329 static int rsnd_dai_connect(struct rsnd_mod *mod,
 330                             struct rsnd_dai_stream *io)
 331 {
 332         if (!mod)
 333                 return -EIO;
 334
 335         if (io->mod[mod->type]) {
 336                 struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
 337                 struct device *dev = rsnd_priv_to_dev(priv);
 338
 339                 dev_err(dev, "%s%d is not empty\n",
 340                         rsnd_mod_name(mod),
 341                         rsnd_mod_id(mod));
 342                 return -EIO;
 343         }
 344
 345         io->mod[mod->type] = mod;
 346         mod->io = io;
 347
 348         return 0;
 349 }
 350
 351 int rsnd_dai_id(struct rsnd_priv *priv, struct rsnd_dai *rdai)
 352 {
 353         int id = rdai - priv->rdai;
 354
 355         if ((id < 0) || (id >= rsnd_rdai_nr(priv)))
 356                 return -EINVAL;
 357
 358         return id;
 359 }
 360
 361 struct rsnd_dai *rsnd_dai_get(struct rsnd_priv *priv, int id)
 362 {
 363         if ((id < 0) || (id >= rsnd_rdai_nr(priv)))
 364                 return NULL;
 365
 366         return priv->rdai + id;
 367 }
 368
 369 static struct rsnd_dai *rsnd_dai_to_rdai(struct snd_soc_dai *dai)
 370 {
 371         struct rsnd_priv *priv = snd_soc_dai_get_drvdata(dai);
 372
 373         return rsnd_dai_get(priv, dai->id);
 374 }
 375
 376 int rsnd_dai_is_play(struct rsnd_dai *rdai, struct rsnd_dai_stream *io)
 377 {
 378         return &rdai->playback == io;
 379 }
 380
 381 /*
 382  *      rsnd_soc_dai functions
 383  */
 384 int rsnd_dai_pointer_offset(struct rsnd_dai_stream *io, int additional)
 385 {
 386         struct snd_pcm_substream *substream = io->substream;
 387         struct snd_pcm_runtime *runtime = substream->runtime;
 388         int pos = io->byte_pos + additional;
 389
 390         pos %= (runtime->periods * io->byte_per_period);
 391
 392         return pos;
 393 }
 394
 395 void rsnd_dai_pointer_update(struct rsnd_dai_stream *io, int byte)
 396 {
 397         io->byte_pos += byte;
 398
 399         if (io->byte_pos >= io->next_period_byte) {
 400                 struct snd_pcm_substream *substream = io->substream;
 401                 struct snd_pcm_runtime *runtime = substream->runtime;
 402
 403                 io->period_pos++;
 404                 io->next_period_byte += io->byte_per_period;
 405
 406                 if (io->period_pos >= runtime->periods) {
 407                         io->byte_pos = 0;
 408                         io->period_pos = 0;
 409                         io->next_period_byte = io->byte_per_period;
 410                 }
 411
 412                 snd_pcm_period_elapsed(substream);
 413         }
 414 }
 415
 416 static int rsnd_dai_stream_init(struct rsnd_dai_stream *io,
 417                                 struct snd_pcm_substream *substream)
 418 {
 419         struct snd_pcm_runtime *runtime = substream->runtime;
 420
 421         io->substream           = substream;
 422         io->byte_pos            = 0;
 423         io->period_pos          = 0;
 424         io->byte_per_period     = runtime->period_size *
 425                                   runtime->channels *
 426                                   samples_to_bytes(runtime, 1);
 427         io->next_period_byte    = io->byte_per_period;
 428
 429         return 0;
 430 }
 431
 432 static
 433 struct snd_soc_dai *rsnd_substream_to_dai(struct snd_pcm_substream *substream)
 434 {
 435         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 436
 437         return  rtd->cpu_dai;
 438 }
 439
 440 static
 441 struct rsnd_dai_stream *rsnd_rdai_to_io(struct rsnd_dai *rdai,
 442                                         struct snd_pcm_substream *substream)
 443 {
 444         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 445                 return &rdai->playback;
 446         else
 447                 return &rdai->capture;
 448 }
 449
 450 static int rsnd_soc_dai_trigger(struct snd_pcm_substream *substream, int cmd,
 451                             struct snd_soc_dai *dai)
 452 {
 453         struct rsnd_priv *priv = snd_soc_dai_get_drvdata(dai);
 454         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
 455         struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream);
 456         struct rsnd_mod *mod = rsnd_ssi_mod_get_frm_dai(priv,
 457                                                 rsnd_dai_id(priv, rdai),
 458                                                 rsnd_dai_is_play(rdai, io));
 459         int ssi_id = rsnd_mod_id(mod);
 460         int ret;
 461         unsigned long flags;
 462
 463         rsnd_lock(priv, flags);
 464
 465         switch (cmd) {
 466         case SNDRV_PCM_TRIGGER_START:
 467                 ret = rsnd_dai_stream_init(io, substream);
 468                 if (ret < 0)
 469                         goto dai_trigger_end;
 470
 471                 ret = rsnd_platform_call(priv, dai, start, ssi_id);
 472                 if (ret < 0)
 473                         goto dai_trigger_end;
 474
 475                 ret = rsnd_dai_call(rdai, io, init);
 476                 if (ret < 0)
 477                         goto dai_trigger_end;
 478
 479                 ret = rsnd_dai_call(rdai, io, start);
 480                 if (ret < 0)
 481                         goto dai_trigger_end;
 482                 break;
 483         case SNDRV_PCM_TRIGGER_STOP:
 484                 ret = rsnd_dai_call(rdai, io, stop);
 485                 if (ret < 0)
 486                         goto dai_trigger_end;
 487
 488                 ret = rsnd_dai_call(rdai, io, quit);
 489                 if (ret < 0)
 490                         goto dai_trigger_end;
 491
 492                 ret = rsnd_platform_call(priv, dai, stop, ssi_id);
 493                 if (ret < 0)
 494                         goto dai_trigger_end;
 495                 break;
 496         default:
 497                 ret = -EINVAL;
 498         }
 499
 500 dai_trigger_end:
 501         rsnd_unlock(priv, flags);
 502
 503         return ret;
 504 }
 505
 506 static int rsnd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
 507 {
 508         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
 509
 510         /* set master/slave audio interface */
 511         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 512         case SND_SOC_DAIFMT_CBM_CFM:
 513                 rdai->clk_master = 1;
 514                 break;
 515         case SND_SOC_DAIFMT_CBS_CFS:
 516                 rdai->clk_master = 0;
 517                 break;
 518         default:
 519                 return -EINVAL;
 520         }
 521
 522         /* set clock inversion */
 523         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
 524         case SND_SOC_DAIFMT_NB_IF:
 525                 rdai->bit_clk_inv = 0;
 526                 rdai->frm_clk_inv = 1;
 527                 break;
 528         case SND_SOC_DAIFMT_IB_NF:
 529                 rdai->bit_clk_inv = 1;
 530                 rdai->frm_clk_inv = 0;
 531                 break;
 532         case SND_SOC_DAIFMT_IB_IF:
 533                 rdai->bit_clk_inv = 1;
 534                 rdai->frm_clk_inv = 1;
 535                 break;
 536         case SND_SOC_DAIFMT_NB_NF:
 537         default:
 538                 rdai->bit_clk_inv = 0;
 539                 rdai->frm_clk_inv = 0;
 540                 break;
 541         }
 542
 543         /* set format */
 544         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 545         case SND_SOC_DAIFMT_I2S:
 546                 rdai->sys_delay = 0;
 547                 rdai->data_alignment = 0;
 548                 break;
 549         case SND_SOC_DAIFMT_LEFT_J:
 550                 rdai->sys_delay = 1;
 551                 rdai->data_alignment = 0;
 552                 break;
 553         case SND_SOC_DAIFMT_RIGHT_J:
 554                 rdai->sys_delay = 1;
 555                 rdai->data_alignment = 1;
 556                 break;
 557         }
 558
 559         return 0;
 560 }
 561
 562 static const struct snd_soc_dai_ops rsnd_soc_dai_ops = {
 563         .trigger        = rsnd_soc_dai_trigger,
 564         .set_fmt        = rsnd_soc_dai_set_fmt,
 565 };
 566
 567 static int rsnd_path_init(struct rsnd_priv *priv,
 568                           struct rsnd_dai *rdai,
 569                           struct rsnd_dai_stream *io)
 570 {
 571         struct rsnd_mod *mod;
 572         struct rsnd_dai_platform_info *dai_info = rdai->info;
 573         int ret;
 574         int ssi_id = -1;
 575         int src_id = -1;
 576
 577         /*
 578          * Gen1 is created by SRU/SSI, and this SRU is base module of
 579          * Gen2's SCU/SSIU/SSI. (Gen2 SCU/SSIU came from SRU)
 580          *
 581          * Easy image is..
 582          *      Gen1 SRU = Gen2 SCU + SSIU + etc
 583          *
 584          * Gen2 SCU path is very flexible, but, Gen1 SRU (SCU parts) is
 585          * using fixed path.
 586          */
 587         if (dai_info) {
 588                 if (rsnd_is_enable_path(io, ssi))
 589                         ssi_id = rsnd_info_id(priv, io, ssi);
 590                 if (rsnd_is_enable_path(io, src))
 591                         src_id = rsnd_info_id(priv, io, src);
 592         } else {
 593                 /* get SSI's ID */
 594                 mod = rsnd_ssi_mod_get_frm_dai(priv,
 595                                                rsnd_dai_id(priv, rdai),
 596                                                rsnd_dai_is_play(rdai, io));
 597                 if (!mod)
 598                         return 0;
 599                 ssi_id = src_id = rsnd_mod_id(mod);
 600         }
 601
 602         ret = 0;
 603
 604         /* SRC */
 605         if (src_id >= 0) {
 606                 mod = rsnd_src_mod_get(priv, src_id);
 607                 ret = rsnd_dai_connect(mod, io);
 608                 if (ret < 0)
 609                         return ret;
 610         }
 611
 612         /* SSI */
 613         if (ssi_id >= 0) {
 614                 mod = rsnd_ssi_mod_get(priv, ssi_id);
 615                 ret = rsnd_dai_connect(mod, io);
 616                 if (ret < 0)
 617                         return ret;
 618         }
 619
 620         return ret;
 621 }
 622
 623 static int rsnd_dai_probe(struct platform_device *pdev,
 624                           struct rsnd_priv *priv)
 625 {
 626         struct snd_soc_dai_driver *drv;
 627         struct rcar_snd_info *info = rsnd_priv_to_info(priv);
 628         struct rsnd_dai *rdai;
 629         struct rsnd_mod *pmod, *cmod;
 630         struct device *dev = rsnd_priv_to_dev(priv);
 631         int dai_nr = info->dai_info_nr;
 632         int i;
 633
 634         /*
 635          * dai_nr should be set via dai_info_nr,
 636          * but allow it to keeping compatible
 637          */
 638         if (!dai_nr) {
 639                 /* get max dai nr */
 640                 for (dai_nr = 0; dai_nr < 32; dai_nr++) {
 641                         pmod = rsnd_ssi_mod_get_frm_dai(priv, dai_nr, 1);
 642                         cmod = rsnd_ssi_mod_get_frm_dai(priv, dai_nr, 0);
 643
 644                         if (!pmod && !cmod)
 645                                 break;
 646                 }
 647         }
 648
 649         if (!dai_nr) {
 650                 dev_err(dev, "no dai\n");
 651                 return -EIO;
 652         }
 653
 654         drv  = devm_kzalloc(dev, sizeof(*drv)  * dai_nr, GFP_KERNEL);
 655         rdai = devm_kzalloc(dev, sizeof(*rdai) * dai_nr, GFP_KERNEL);
 656         if (!drv || !rdai) {
 657                 dev_err(dev, "dai allocate failed\n");
 658                 return -ENOMEM;
 659         }
 660
 661         priv->rdai_nr   = dai_nr;
 662         priv->daidrv    = drv;
 663         priv->rdai      = rdai;
 664
 665         for (i = 0; i < dai_nr; i++) {
 666                 if (info->dai_info)
 667                         rdai[i].info = &info->dai_info[i];
 668
 669                 pmod = rsnd_ssi_mod_get_frm_dai(priv, i, 1);
 670                 cmod = rsnd_ssi_mod_get_frm_dai(priv, i, 0);
 671
 672                 /*
 673                  *      init rsnd_dai
 674                  */
 675                 snprintf(rdai[i].name, RSND_DAI_NAME_SIZE, "rsnd-dai.%d", i);
 676
 677                 /*
 678                  *      init snd_soc_dai_driver
 679                  */
 680                 drv[i].name     = rdai[i].name;
 681                 drv[i].ops      = &rsnd_soc_dai_ops;
 682                 if (pmod) {
 683                         drv[i].playback.rates           = RSND_RATES;
 684                         drv[i].playback.formats         = RSND_FMTS;
 685                         drv[i].playback.channels_min    = 2;
 686                         drv[i].playback.channels_max    = 2;
 687
 688                         if (info->dai_info)
 689                                 rdai[i].playback.info = &info->dai_info[i].playback;
 690                         rsnd_path_init(priv, &rdai[i], &rdai[i].playback);
 691                 }
 692                 if (cmod) {
 693                         drv[i].capture.rates            = RSND_RATES;
 694                         drv[i].capture.formats          = RSND_FMTS;
 695                         drv[i].capture.channels_min     = 2;
 696                         drv[i].capture.channels_max     = 2;
 697
 698                         if (info->dai_info)
 699                                 rdai[i].capture.info = &info->dai_info[i].capture;
 700                         rsnd_path_init(priv, &rdai[i], &rdai[i].capture);
 701                 }
 702
 703                 dev_dbg(dev, "%s (%s/%s)\n", rdai[i].name,
 704                         pmod ? "play"    : " -- ",
 705                         cmod ? "capture" : "  --   ");
 706         }
 707
 708         return 0;
 709 }
 710
 711 /*
 712  *              pcm ops
 713  */
 714 static struct snd_pcm_hardware rsnd_pcm_hardware = {
 715         .info =         SNDRV_PCM_INFO_INTERLEAVED      |
 716                         SNDRV_PCM_INFO_MMAP             |
 717                         SNDRV_PCM_INFO_MMAP_VALID       |
 718                         SNDRV_PCM_INFO_PAUSE,
 719         .buffer_bytes_max       = 64 * 1024,
 720         .period_bytes_min       = 32,
 721         .period_bytes_max       = 8192,
 722         .periods_min            = 1,
 723         .periods_max            = 32,
 724         .fifo_size              = 256,
 725 };
 726
 727 static int rsnd_pcm_open(struct snd_pcm_substream *substream)
 728 {
 729         struct snd_pcm_runtime *runtime = substream->runtime;
 730         int ret = 0;
 731
 732         snd_soc_set_runtime_hwparams(substream, &rsnd_pcm_hardware);
 733
 734         ret = snd_pcm_hw_constraint_integer(runtime,
 735                                             SNDRV_PCM_HW_PARAM_PERIODS);
 736
 737         return ret;
 738 }
 739
 740 static int rsnd_hw_params(struct snd_pcm_substream *substream,
 741                          struct snd_pcm_hw_params *hw_params)
 742 {
 743         return snd_pcm_lib_malloc_pages(substream,
 744                                         params_buffer_bytes(hw_params));
 745 }
 746
 747 static snd_pcm_uframes_t rsnd_pointer(struct snd_pcm_substream *substream)
 748 {
 749         struct snd_pcm_runtime *runtime = substream->runtime;
 750         struct snd_soc_dai *dai = rsnd_substream_to_dai(substream);
 751         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
 752         struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream);
 753
 754         return bytes_to_frames(runtime, io->byte_pos);
 755 }
 756
 757 static struct snd_pcm_ops rsnd_pcm_ops = {
 758         .open           = rsnd_pcm_open,
 759         .ioctl          = snd_pcm_lib_ioctl,
 760         .hw_params      = rsnd_hw_params,
 761         .hw_free        = snd_pcm_lib_free_pages,
 762         .pointer        = rsnd_pointer,
 763 };
 764
 765 /*
 766  *              snd_soc_platform
 767  */
 768
 769 #define PREALLOC_BUFFER         (32 * 1024)
 770 #define PREALLOC_BUFFER_MAX     (32 * 1024)
 771
 772 static int rsnd_pcm_new(struct snd_soc_pcm_runtime *rtd)
 773 {
 774         return snd_pcm_lib_preallocate_pages_for_all(
 775                 rtd->pcm,
 776                 SNDRV_DMA_TYPE_DEV,
 777                 rtd->card->snd_card->dev,
 778                 PREALLOC_BUFFER, PREALLOC_BUFFER_MAX);
 779 }
 780
 781 static void rsnd_pcm_free(struct snd_pcm *pcm)
 782 {
 783         snd_pcm_lib_preallocate_free_for_all(pcm);
 784 }
 785
 786 static struct snd_soc_platform_driver rsnd_soc_platform = {
 787         .ops            = &rsnd_pcm_ops,
 788         .pcm_new        = rsnd_pcm_new,
 789         .pcm_free       = rsnd_pcm_free,
 790 };
 791
 792 static const struct snd_soc_component_driver rsnd_soc_component = {
 793         .name           = "rsnd",
 794 };
 795
 796 /*
 797  *      rsnd probe
 798  */
 799 static int rsnd_probe(struct platform_device *pdev)
 800 {
 801         struct rcar_snd_info *info;
 802         struct rsnd_priv *priv;
 803         struct device *dev = &pdev->dev;
 804         struct rsnd_dai *rdai;
 805         int (*probe_func[])(struct platform_device *pdev,
 806                             struct rsnd_priv *priv) = {
 807                 rsnd_gen_probe,
 808                 rsnd_ssi_probe,
 809                 rsnd_src_probe,
 810                 rsnd_adg_probe,
 811                 rsnd_dai_probe,
 812         };
 813         int ret, i;
 814
 815         info = pdev->dev.platform_data;
 816         if (!info) {
 817                 dev_err(dev, "driver needs R-Car sound information\n");
 818                 return -ENODEV;
 819         }
 820
 821         /*
 822          *      init priv data
 823          */
 824         priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
 825         if (!priv) {
 826                 dev_err(dev, "priv allocate failed\n");
 827                 return -ENODEV;
 828         }
 829
 830         priv->dev       = dev;
 831         priv->info      = info;
 832         spin_lock_init(&priv->lock);
 833
 834         /*
 835          *      init each module
 836          */
 837         for (i = 0; i < ARRAY_SIZE(probe_func); i++) {
 838                 ret = probe_func[i](pdev, priv);
 839                 if (ret)
 840                         return ret;
 841         }
 842
 843         for_each_rsnd_dai(rdai, priv, i) {
 844                 ret = rsnd_dai_call(rdai, &rdai->playback, probe);
 845                 if (ret)
 846                         return ret;
 847
 848                 ret = rsnd_dai_call(rdai, &rdai->capture, probe);
 849                 if (ret)
 850                         return ret;
 851         }
 852
 853         /*
 854          *      asoc register
 855          */
 856         ret = snd_soc_register_platform(dev, &rsnd_soc_platform);
 857         if (ret < 0) {
 858                 dev_err(dev, "cannot snd soc register\n");
 859                 return ret;
 860         }
 861
 862         ret = snd_soc_register_component(dev, &rsnd_soc_component,
 863                                          priv->daidrv, rsnd_rdai_nr(priv));
 864         if (ret < 0) {
 865                 dev_err(dev, "cannot snd dai register\n");
 866                 goto exit_snd_soc;
 867         }
 868
 869         dev_set_drvdata(dev, priv);
 870
 871         pm_runtime_enable(dev);
 872
 873         dev_info(dev, "probed\n");
 874         return ret;
 875
 876 exit_snd_soc:
 877         snd_soc_unregister_platform(dev);
 878
 879         return ret;
 880 }
 881
 882 static int rsnd_remove(struct platform_device *pdev)
 883 {
 884         struct rsnd_priv *priv = dev_get_drvdata(&pdev->dev);
 885         struct rsnd_dai *rdai;
 886         int ret, i;
 887
 888         pm_runtime_disable(&pdev->dev);
 889
 890         for_each_rsnd_dai(rdai, priv, i) {
 891                 ret = rsnd_dai_call(rdai, &rdai->playback, remove);
 892                 if (ret)
 893                         return ret;
 894
 895                 ret = rsnd_dai_call(rdai, &rdai->capture, remove);
 896                 if (ret)
 897                         return ret;
 898         }
 899
 900         return 0;
 901 }
 902
 903 static struct platform_driver rsnd_driver = {
 904         .driver = {
 905                 .name   = "rcar_sound",
 906         },
 907         .probe          = rsnd_probe,
 908         .remove         = rsnd_remove,
 909 };
 910 module_platform_driver(rsnd_driver);
 911
 912 MODULE_LICENSE("GPL");
 913 MODULE_DESCRIPTION("Renesas R-Car audio driver");
 914 MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");
 915 MODULE_ALIAS("platform:rcar-pcm-audio");