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 char *rsnd_mod_dma_name(struct rsnd_mod *mod)
 142 {
 143         if (!mod || !mod->ops)
 144                 return "unknown";
 145
 146         if (!mod->ops->dma_name)
 147                 return mod->ops->name;
 148
 149         return mod->ops->dma_name(mod);
 150 }
 151
 152 void rsnd_mod_init(struct rsnd_priv *priv,
 153                    struct rsnd_mod *mod,
 154                    struct rsnd_mod_ops *ops,
 155                    struct clk *clk,
 156                    enum rsnd_mod_type type,
 157                    int id)
 158 {
 159         mod->priv       = priv;
 160         mod->id         = id;
 161         mod->ops        = ops;
 162         mod->type       = type;
 163         mod->clk        = clk;
 164 }
 165
 166 /*
 167  *      rsnd_dma functions
 168  */
 169 void rsnd_dma_stop(struct rsnd_dma *dma)
 170 {
 171         dmaengine_terminate_all(dma->chan);
 172 }
 173
 174 static void rsnd_dma_complete(void *data)
 175 {
 176         struct rsnd_dma *dma = (struct rsnd_dma *)data;
 177         struct rsnd_mod *mod = rsnd_dma_to_mod(dma);
 178         struct rsnd_dai_stream *io = rsnd_mod_to_io(mod);
 179
 180         /*
 181          * Renesas sound Gen1 needs 1 DMAC,
 182          * Gen2 needs 2 DMAC.
 183          * In Gen2 case, it are Audio-DMAC, and Audio-DMAC-peri-peri.
 184          * But, Audio-DMAC-peri-peri doesn't have interrupt,
 185          * and this driver is assuming that here.
 186          *
 187          * If Audio-DMAC-peri-peri has interrpt,
 188          * rsnd_dai_pointer_update() will be called twice,
 189          * ant it will breaks io->byte_pos
 190          */
 191
 192         rsnd_dai_pointer_update(io, io->byte_per_period);
 193 }
 194
 195 void rsnd_dma_start(struct rsnd_dma *dma)
 196 {
 197         struct rsnd_mod *mod = rsnd_dma_to_mod(dma);
 198         struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
 199         struct rsnd_dai_stream *io = rsnd_mod_to_io(mod);
 200         struct snd_pcm_substream *substream = io->substream;
 201         struct device *dev = rsnd_priv_to_dev(priv);
 202         struct dma_async_tx_descriptor *desc;
 203
 204         desc = dmaengine_prep_dma_cyclic(dma->chan,
 205                                          (dma->addr) ? dma->addr :
 206                                          substream->runtime->dma_addr,
 207                                          snd_pcm_lib_buffer_bytes(substream),
 208                                          snd_pcm_lib_period_bytes(substream),
 209                                          dma->dir,
 210                                          DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
 211
 212         if (!desc) {
 213                 dev_err(dev, "dmaengine_prep_slave_sg() fail\n");
 214                 return;
 215         }
 216
 217         desc->callback          = rsnd_dma_complete;
 218         desc->callback_param    = dma;
 219
 220         if (dmaengine_submit(desc) < 0) {
 221                 dev_err(dev, "dmaengine_submit() fail\n");
 222                 return;
 223         }
 224
 225         dma_async_issue_pending(dma->chan);
 226 }
 227
 228 int rsnd_dma_available(struct rsnd_dma *dma)
 229 {
 230         return !!dma->chan;
 231 }
 232
 233 #define DMA_NAME_SIZE 16
 234 #define MOD_MAX 4 /* MEM/SSI/SRC/DVC */
 235 static int _rsnd_dma_of_name(char *dma_name, struct rsnd_mod *mod)
 236 {
 237         if (mod)
 238                 return snprintf(dma_name, DMA_NAME_SIZE / 2, "%s%d",
 239                          rsnd_mod_dma_name(mod), rsnd_mod_id(mod));
 240         else
 241                 return snprintf(dma_name, DMA_NAME_SIZE / 2, "mem");
 242
 243 }
 244
 245 static void rsnd_dma_of_name(struct rsnd_mod *mod_from,
 246                              struct rsnd_mod *mod_to,
 247                              char *dma_name)
 248 {
 249         int index = 0;
 250
 251         index = _rsnd_dma_of_name(dma_name + index, mod_from);
 252         *(dma_name + index++) = '_';
 253         index = _rsnd_dma_of_name(dma_name + index, mod_to);
 254 }
 255
 256 static void rsnd_dma_of_path(struct rsnd_dma *dma,
 257                              int is_play,
 258                              struct rsnd_mod **mod_from,
 259                              struct rsnd_mod **mod_to)
 260 {
 261         struct rsnd_mod *this = rsnd_dma_to_mod(dma);
 262         struct rsnd_dai_stream *io = rsnd_mod_to_io(this);
 263         struct rsnd_mod *ssi = rsnd_io_to_mod_ssi(io);
 264         struct rsnd_mod *src = rsnd_io_to_mod_src(io);
 265         struct rsnd_mod *dvc = rsnd_io_to_mod_dvc(io);
 266         struct rsnd_mod *mod[MOD_MAX];
 267         int i, index;
 268
 269
 270         for (i = 0; i < MOD_MAX; i++)
 271                 mod[i] = NULL;
 272
 273         /*
 274          * in play case...
 275          *
 276          * src -> dst
 277          *
 278          * mem -> SSI
 279          * mem -> SRC -> SSI
 280          * mem -> SRC -> DVC -> SSI
 281          */
 282         mod[0] = NULL; /* for "mem" */
 283         index = 1;
 284         for (i = 1; i < MOD_MAX; i++) {
 285                 if (!src) {
 286                         mod[i] = ssi;
 287                 } else if (!dvc) {
 288                         mod[i] = src;
 289                         src = NULL;
 290                 } else {
 291                         if ((!is_play) && (this == src))
 292                                 this = dvc;
 293
 294                         mod[i] = (is_play) ? src : dvc;
 295                         i++;
 296                         mod[i] = (is_play) ? dvc : src;
 297                         src = NULL;
 298                         dvc = NULL;
 299                 }
 300
 301                 if (mod[i] == this)
 302                         index = i;
 303
 304                 if (mod[i] == ssi)
 305                         break;
 306         }
 307
 308         if (is_play) {
 309                 *mod_from = mod[index - 1];
 310                 *mod_to   = mod[index];
 311         } else {
 312                 *mod_from = mod[index];
 313                 *mod_to   = mod[index - 1];
 314         }
 315 }
 316
 317 int rsnd_dma_init(struct rsnd_priv *priv, struct rsnd_dma *dma,
 318                   int is_play, int id)
 319 {
 320         struct device *dev = rsnd_priv_to_dev(priv);
 321         struct dma_slave_config cfg;
 322         struct rsnd_mod *mod_from;
 323         struct rsnd_mod *mod_to;
 324         char dma_name[DMA_NAME_SIZE];
 325         dma_cap_mask_t mask;
 326         int ret;
 327
 328         if (dma->chan) {
 329                 dev_err(dev, "it already has dma channel\n");
 330                 return -EIO;
 331         }
 332
 333         dma_cap_zero(mask);
 334         dma_cap_set(DMA_SLAVE, mask);
 335
 336         rsnd_dma_of_path(dma, is_play, &mod_from, &mod_to);
 337         rsnd_dma_of_name(mod_from, mod_to, dma_name);
 338
 339         cfg.slave_id    = id;
 340         cfg.direction   = is_play ? DMA_MEM_TO_DEV : DMA_DEV_TO_MEM;
 341         cfg.src_addr    = rsnd_gen_dma_addr(priv, mod_from, is_play, 1);
 342         cfg.dst_addr    = rsnd_gen_dma_addr(priv, mod_to,   is_play, 0);
 343         cfg.src_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
 344         cfg.dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
 345
 346         dev_dbg(dev, "dma : %s %pad -> %pad\n",
 347                 dma_name, &cfg.src_addr, &cfg.dst_addr);
 348
 349         dma->chan = dma_request_slave_channel_compat(mask, shdma_chan_filter,
 350                                                      (void *)id, dev,
 351                                                      dma_name);
 352         if (!dma->chan) {
 353                 dev_err(dev, "can't get dma channel\n");
 354                 goto rsnd_dma_channel_err;
 355         }
 356
 357         ret = dmaengine_slave_config(dma->chan, &cfg);
 358         if (ret < 0)
 359                 goto rsnd_dma_init_err;
 360
 361         dma->addr = is_play ? cfg.src_addr : cfg.dst_addr;
 362         dma->dir = is_play ? DMA_MEM_TO_DEV : DMA_DEV_TO_MEM;
 363
 364         return 0;
 365
 366 rsnd_dma_init_err:
 367         rsnd_dma_quit(priv, dma);
 368 rsnd_dma_channel_err:
 369
 370         /*
 371          * DMA failed. try to PIO mode
 372          * see
 373          *      rsnd_ssi_fallback()
 374          *      rsnd_rdai_continuance_probe()
 375          */
 376         return -EAGAIN;
 377 }
 378
 379 void  rsnd_dma_quit(struct rsnd_priv *priv,
 380                     struct rsnd_dma *dma)
 381 {
 382         if (dma->chan)
 383                 dma_release_channel(dma->chan);
 384
 385         dma->chan = NULL;
 386 }
 387
 388 /*
 389  *      settting function
 390  */
 391 u32 rsnd_get_adinr(struct rsnd_mod *mod)
 392 {
 393         struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
 394         struct rsnd_dai_stream *io = rsnd_mod_to_io(mod);
 395         struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
 396         struct device *dev = rsnd_priv_to_dev(priv);
 397         u32 adinr = runtime->channels;
 398
 399         switch (runtime->sample_bits) {
 400         case 16:
 401                 adinr |= (8 << 16);
 402                 break;
 403         case 32:
 404                 adinr |= (0 << 16);
 405                 break;
 406         default:
 407                 dev_warn(dev, "not supported sample bits\n");
 408                 return 0;
 409         }
 410
 411         return adinr;
 412 }
 413
 414 /*
 415  *      rsnd_dai functions
 416  */
 417 #define __rsnd_mod_call(mod, func, rdai...)                     \
 418 ({                                                              \
 419         struct rsnd_priv *priv = rsnd_mod_to_priv(mod);         \
 420         struct device *dev = rsnd_priv_to_dev(priv);            \
 421         u32 mask = 1 << __rsnd_mod_shift_##func;                        \
 422         u32 call = __rsnd_mod_call_##func << __rsnd_mod_shift_##func;   \
 423         int ret = 0;                                                    \
 424         if ((mod->status & mask) == call) {                             \
 425                 dev_dbg(dev, "%s[%d] %s\n",                             \
 426                         rsnd_mod_name(mod), rsnd_mod_id(mod), #func);   \
 427                 ret = (mod)->ops->func(mod, rdai);                      \
 428                 mod->status = (mod->status & ~mask) | (~call & mask);   \
 429         }                                                               \
 430         ret;                                                            \
 431 })
 432
 433 #define rsnd_mod_call(mod, func, rdai...)       \
 434         (!(mod) ? -ENODEV :                     \
 435          !((mod)->ops->func) ? 0 :              \
 436          __rsnd_mod_call(mod, func, rdai))
 437
 438 #define rsnd_dai_call(fn, io, rdai...)                          \
 439 ({                                                              \
 440         struct rsnd_mod *mod;                                   \
 441         int ret = 0, i;                                         \
 442         for (i = 0; i < RSND_MOD_MAX; i++) {                    \
 443                 mod = (io)->mod[i];                             \
 444                 if (!mod)                                       \
 445                         continue;                               \
 446                 ret = rsnd_mod_call(mod, fn, rdai);             \
 447                 if (ret < 0)                                    \
 448                         break;                                  \
 449         }                                                       \
 450         ret;                                                    \
 451 })
 452
 453 static int rsnd_dai_connect(struct rsnd_mod *mod,
 454                             struct rsnd_dai_stream *io)
 455 {
 456         if (!mod)
 457                 return -EIO;
 458
 459         if (io->mod[mod->type]) {
 460                 struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
 461                 struct device *dev = rsnd_priv_to_dev(priv);
 462
 463                 dev_err(dev, "%s%d is not empty\n",
 464                         rsnd_mod_name(mod),
 465                         rsnd_mod_id(mod));
 466                 return -EIO;
 467         }
 468
 469         io->mod[mod->type] = mod;
 470         mod->io = io;
 471
 472         return 0;
 473 }
 474
 475 static void rsnd_dai_disconnect(struct rsnd_mod *mod,
 476                                 struct rsnd_dai_stream *io)
 477 {
 478         mod->io = NULL;
 479         io->mod[mod->type] = NULL;
 480 }
 481
 482 struct rsnd_dai *rsnd_rdai_get(struct rsnd_priv *priv, int id)
 483 {
 484         if ((id < 0) || (id >= rsnd_rdai_nr(priv)))
 485                 return NULL;
 486
 487         return priv->rdai + id;
 488 }
 489
 490 static struct rsnd_dai *rsnd_dai_to_rdai(struct snd_soc_dai *dai)
 491 {
 492         struct rsnd_priv *priv = snd_soc_dai_get_drvdata(dai);
 493
 494         return rsnd_rdai_get(priv, dai->id);
 495 }
 496
 497 /*
 498  *      rsnd_soc_dai functions
 499  */
 500 int rsnd_dai_pointer_offset(struct rsnd_dai_stream *io, int additional)
 501 {
 502         struct snd_pcm_substream *substream = io->substream;
 503         struct snd_pcm_runtime *runtime = substream->runtime;
 504         int pos = io->byte_pos + additional;
 505
 506         pos %= (runtime->periods * io->byte_per_period);
 507
 508         return pos;
 509 }
 510
 511 void rsnd_dai_pointer_update(struct rsnd_dai_stream *io, int byte)
 512 {
 513         io->byte_pos += byte;
 514
 515         if (io->byte_pos >= io->next_period_byte) {
 516                 struct snd_pcm_substream *substream = io->substream;
 517                 struct snd_pcm_runtime *runtime = substream->runtime;
 518
 519                 io->period_pos++;
 520                 io->next_period_byte += io->byte_per_period;
 521
 522                 if (io->period_pos >= runtime->periods) {
 523                         io->byte_pos = 0;
 524                         io->period_pos = 0;
 525                         io->next_period_byte = io->byte_per_period;
 526                 }
 527
 528                 snd_pcm_period_elapsed(substream);
 529         }
 530 }
 531
 532 static int rsnd_dai_stream_init(struct rsnd_dai_stream *io,
 533                                 struct snd_pcm_substream *substream)
 534 {
 535         struct snd_pcm_runtime *runtime = substream->runtime;
 536
 537         io->substream           = substream;
 538         io->byte_pos            = 0;
 539         io->period_pos          = 0;
 540         io->byte_per_period     = runtime->period_size *
 541                                   runtime->channels *
 542                                   samples_to_bytes(runtime, 1);
 543         io->next_period_byte    = io->byte_per_period;
 544
 545         return 0;
 546 }
 547
 548 static
 549 struct snd_soc_dai *rsnd_substream_to_dai(struct snd_pcm_substream *substream)
 550 {
 551         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 552
 553         return  rtd->cpu_dai;
 554 }
 555
 556 static
 557 struct rsnd_dai_stream *rsnd_rdai_to_io(struct rsnd_dai *rdai,
 558                                         struct snd_pcm_substream *substream)
 559 {
 560         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 561                 return &rdai->playback;
 562         else
 563                 return &rdai->capture;
 564 }
 565
 566 static int rsnd_soc_dai_trigger(struct snd_pcm_substream *substream, int cmd,
 567                             struct snd_soc_dai *dai)
 568 {
 569         struct rsnd_priv *priv = snd_soc_dai_get_drvdata(dai);
 570         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
 571         struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream);
 572         int ssi_id = rsnd_mod_id(rsnd_io_to_mod_ssi(io));
 573         int ret;
 574         unsigned long flags;
 575
 576         rsnd_lock(priv, flags);
 577
 578         switch (cmd) {
 579         case SNDRV_PCM_TRIGGER_START:
 580                 ret = rsnd_dai_stream_init(io, substream);
 581                 if (ret < 0)
 582                         goto dai_trigger_end;
 583
 584                 ret = rsnd_platform_call(priv, dai, start, ssi_id);
 585                 if (ret < 0)
 586                         goto dai_trigger_end;
 587
 588                 ret = rsnd_dai_call(init, io, rdai);
 589                 if (ret < 0)
 590                         goto dai_trigger_end;
 591
 592                 ret = rsnd_dai_call(start, io, rdai);
 593                 if (ret < 0)
 594                         goto dai_trigger_end;
 595                 break;
 596         case SNDRV_PCM_TRIGGER_STOP:
 597                 ret = rsnd_dai_call(stop, io, rdai);
 598                 if (ret < 0)
 599                         goto dai_trigger_end;
 600
 601                 ret = rsnd_dai_call(quit, io, rdai);
 602                 if (ret < 0)
 603                         goto dai_trigger_end;
 604
 605                 ret = rsnd_platform_call(priv, dai, stop, ssi_id);
 606                 if (ret < 0)
 607                         goto dai_trigger_end;
 608                 break;
 609         default:
 610                 ret = -EINVAL;
 611         }
 612
 613 dai_trigger_end:
 614         rsnd_unlock(priv, flags);
 615
 616         return ret;
 617 }
 618
 619 static int rsnd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
 620 {
 621         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
 622
 623         /* set master/slave audio interface */
 624         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 625         case SND_SOC_DAIFMT_CBM_CFM:
 626                 rdai->clk_master = 0;
 627                 break;
 628         case SND_SOC_DAIFMT_CBS_CFS:
 629                 rdai->clk_master = 1; /* codec is slave, cpu is master */
 630                 break;
 631         default:
 632                 return -EINVAL;
 633         }
 634
 635         /* set format */
 636         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 637         case SND_SOC_DAIFMT_I2S:
 638                 rdai->sys_delay = 0;
 639                 rdai->data_alignment = 0;
 640                 rdai->frm_clk_inv = 0;
 641                 break;
 642         case SND_SOC_DAIFMT_LEFT_J:
 643                 rdai->sys_delay = 1;
 644                 rdai->data_alignment = 0;
 645                 rdai->frm_clk_inv = 1;
 646                 break;
 647         case SND_SOC_DAIFMT_RIGHT_J:
 648                 rdai->sys_delay = 1;
 649                 rdai->data_alignment = 1;
 650                 rdai->frm_clk_inv = 1;
 651                 break;
 652         }
 653
 654         /* set clock inversion */
 655         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
 656         case SND_SOC_DAIFMT_NB_IF:
 657                 rdai->bit_clk_inv =  rdai->bit_clk_inv;
 658                 rdai->frm_clk_inv = !rdai->frm_clk_inv;
 659                 break;
 660         case SND_SOC_DAIFMT_IB_NF:
 661                 rdai->bit_clk_inv = !rdai->bit_clk_inv;
 662                 rdai->frm_clk_inv =  rdai->frm_clk_inv;
 663                 break;
 664         case SND_SOC_DAIFMT_IB_IF:
 665                 rdai->bit_clk_inv = !rdai->bit_clk_inv;
 666                 rdai->frm_clk_inv = !rdai->frm_clk_inv;
 667                 break;
 668         case SND_SOC_DAIFMT_NB_NF:
 669         default:
 670                 break;
 671         }
 672
 673         return 0;
 674 }
 675
 676 static const struct snd_soc_dai_ops rsnd_soc_dai_ops = {
 677         .trigger        = rsnd_soc_dai_trigger,
 678         .set_fmt        = rsnd_soc_dai_set_fmt,
 679 };
 680
 681 #define rsnd_path_parse(priv, io, type)                         \
 682 ({                                                              \
 683         struct rsnd_mod *mod;                                   \
 684         int ret = 0;                                            \
 685         int id = -1;                                            \
 686                                                                 \
 687         if (rsnd_is_enable_path(io, type)) {                    \
 688                 id = rsnd_info_id(priv, io, type);              \
 689                 if (id >= 0) {                                  \
 690                         mod = rsnd_##type##_mod_get(priv, id);  \
 691                         ret = rsnd_dai_connect(mod, io);        \
 692                 }                                               \
 693         }                                                       \
 694         ret;                                                    \
 695 })
 696
 697 #define rsnd_path_break(priv, io, type)                         \
 698 {                                                               \
 699         struct rsnd_mod *mod;                                   \
 700         int id = -1;                                            \
 701                                                                 \
 702         if (rsnd_is_enable_path(io, type)) {                    \
 703                 id = rsnd_info_id(priv, io, type);              \
 704                 if (id >= 0) {                                  \
 705                         mod = rsnd_##type##_mod_get(priv, id);  \
 706                         rsnd_dai_disconnect(mod, io);           \
 707                 }                                               \
 708         }                                                       \
 709 }
 710
 711 static int rsnd_path_init(struct rsnd_priv *priv,
 712                           struct rsnd_dai *rdai,
 713                           struct rsnd_dai_stream *io)
 714 {
 715         int ret;
 716
 717         /*
 718          * Gen1 is created by SRU/SSI, and this SRU is base module of
 719          * Gen2's SCU/SSIU/SSI. (Gen2 SCU/SSIU came from SRU)
 720          *
 721          * Easy image is..
 722          *      Gen1 SRU = Gen2 SCU + SSIU + etc
 723          *
 724          * Gen2 SCU path is very flexible, but, Gen1 SRU (SCU parts) is
 725          * using fixed path.
 726          */
 727
 728         /* SRC */
 729         ret = rsnd_path_parse(priv, io, src);
 730         if (ret < 0)
 731                 return ret;
 732
 733         /* SSI */
 734         ret = rsnd_path_parse(priv, io, ssi);
 735         if (ret < 0)
 736                 return ret;
 737
 738         /* DVC */
 739         ret = rsnd_path_parse(priv, io, dvc);
 740         if (ret < 0)
 741                 return ret;
 742
 743         return ret;
 744 }
 745
 746 static void rsnd_of_parse_dai(struct platform_device *pdev,
 747                               const struct rsnd_of_data *of_data,
 748                               struct rsnd_priv *priv)
 749 {
 750         struct device_node *dai_node,   *dai_np;
 751         struct device_node *ssi_node,   *ssi_np;
 752         struct device_node *src_node,   *src_np;
 753         struct device_node *dvc_node,   *dvc_np;
 754         struct device_node *playback, *capture;
 755         struct rsnd_dai_platform_info *dai_info;
 756         struct rcar_snd_info *info = rsnd_priv_to_info(priv);
 757         struct device *dev = &pdev->dev;
 758         int nr, i;
 759         int dai_i, ssi_i, src_i, dvc_i;
 760
 761         if (!of_data)
 762                 return;
 763
 764         dai_node = of_get_child_by_name(dev->of_node, "rcar_sound,dai");
 765         if (!dai_node)
 766                 return;
 767
 768         nr = of_get_child_count(dai_node);
 769         if (!nr)
 770                 return;
 771
 772         dai_info = devm_kzalloc(dev,
 773                                 sizeof(struct rsnd_dai_platform_info) * nr,
 774                                 GFP_KERNEL);
 775         if (!dai_info) {
 776                 dev_err(dev, "dai info allocation error\n");
 777                 return;
 778         }
 779
 780         info->dai_info_nr       = nr;
 781         info->dai_info          = dai_info;
 782
 783         ssi_node = of_get_child_by_name(dev->of_node, "rcar_sound,ssi");
 784         src_node = of_get_child_by_name(dev->of_node, "rcar_sound,src");
 785         dvc_node = of_get_child_by_name(dev->of_node, "rcar_sound,dvc");
 786
 787 #define mod_parse(name)                                                 \
 788 if (name##_node) {                                                      \
 789         struct rsnd_##name##_platform_info *name##_info;                \
 790                                                                         \
 791         name##_i = 0;                                                   \
 792         for_each_child_of_node(name##_node, name##_np) {                \
 793                 name##_info = info->name##_info + name##_i;             \
 794                                                                         \
 795                 if (name##_np == playback)                              \
 796                         dai_info->playback.name = name##_info;          \
 797                 if (name##_np == capture)                               \
 798                         dai_info->capture.name = name##_info;           \
 799                                                                         \
 800                 name##_i++;                                             \
 801         }                                                               \
 802 }
 803
 804         /*
 805          * parse all dai
 806          */
 807         dai_i = 0;
 808         for_each_child_of_node(dai_node, dai_np) {
 809                 dai_info = info->dai_info + dai_i;
 810
 811                 for (i = 0;; i++) {
 812
 813                         playback = of_parse_phandle(dai_np, "playback", i);
 814                         capture  = of_parse_phandle(dai_np, "capture", i);
 815
 816                         if (!playback && !capture)
 817                                 break;
 818
 819                         mod_parse(ssi);
 820                         mod_parse(src);
 821                         mod_parse(dvc);
 822
 823                         of_node_put(playback);
 824                         of_node_put(capture);
 825                 }
 826
 827                 dai_i++;
 828         }
 829 }
 830
 831 static int rsnd_dai_probe(struct platform_device *pdev,
 832                           const struct rsnd_of_data *of_data,
 833                           struct rsnd_priv *priv)
 834 {
 835         struct snd_soc_dai_driver *drv;
 836         struct rcar_snd_info *info = rsnd_priv_to_info(priv);
 837         struct rsnd_dai *rdai;
 838         struct rsnd_ssi_platform_info *pmod, *cmod;
 839         struct device *dev = rsnd_priv_to_dev(priv);
 840         int dai_nr;
 841         int i;
 842
 843         rsnd_of_parse_dai(pdev, of_data, priv);
 844
 845         dai_nr = info->dai_info_nr;
 846         if (!dai_nr) {
 847                 dev_err(dev, "no dai\n");
 848                 return -EIO;
 849         }
 850
 851         drv  = devm_kzalloc(dev, sizeof(*drv)  * dai_nr, GFP_KERNEL);
 852         rdai = devm_kzalloc(dev, sizeof(*rdai) * dai_nr, GFP_KERNEL);
 853         if (!drv || !rdai) {
 854                 dev_err(dev, "dai allocate failed\n");
 855                 return -ENOMEM;
 856         }
 857
 858         priv->rdai_nr   = dai_nr;
 859         priv->daidrv    = drv;
 860         priv->rdai      = rdai;
 861
 862         for (i = 0; i < dai_nr; i++) {
 863
 864                 pmod = info->dai_info[i].playback.ssi;
 865                 cmod = info->dai_info[i].capture.ssi;
 866
 867                 /*
 868                  *      init rsnd_dai
 869                  */
 870                 snprintf(rdai[i].name, RSND_DAI_NAME_SIZE, "rsnd-dai.%d", i);
 871
 872                 /*
 873                  *      init snd_soc_dai_driver
 874                  */
 875                 drv[i].name     = rdai[i].name;
 876                 drv[i].ops      = &rsnd_soc_dai_ops;
 877                 if (pmod) {
 878                         drv[i].playback.rates           = RSND_RATES;
 879                         drv[i].playback.formats         = RSND_FMTS;
 880                         drv[i].playback.channels_min    = 2;
 881                         drv[i].playback.channels_max    = 2;
 882
 883                         rdai[i].playback.info = &info->dai_info[i].playback;
 884                         rdai[i].playback.rdai = rdai + i;
 885                         rsnd_path_init(priv, &rdai[i], &rdai[i].playback);
 886                 }
 887                 if (cmod) {
 888                         drv[i].capture.rates            = RSND_RATES;
 889                         drv[i].capture.formats          = RSND_FMTS;
 890                         drv[i].capture.channels_min     = 2;
 891                         drv[i].capture.channels_max     = 2;
 892
 893                         rdai[i].capture.info = &info->dai_info[i].capture;
 894                         rdai[i].capture.rdai = rdai + i;
 895                         rsnd_path_init(priv, &rdai[i], &rdai[i].capture);
 896                 }
 897
 898                 dev_dbg(dev, "%s (%s/%s)\n", rdai[i].name,
 899                         pmod ? "play"    : " -- ",
 900                         cmod ? "capture" : "  --   ");
 901         }
 902
 903         return 0;
 904 }
 905
 906 /*
 907  *              pcm ops
 908  */
 909 static struct snd_pcm_hardware rsnd_pcm_hardware = {
 910         .info =         SNDRV_PCM_INFO_INTERLEAVED      |
 911                         SNDRV_PCM_INFO_MMAP             |
 912                         SNDRV_PCM_INFO_MMAP_VALID,
 913         .buffer_bytes_max       = 64 * 1024,
 914         .period_bytes_min       = 32,
 915         .period_bytes_max       = 8192,
 916         .periods_min            = 1,
 917         .periods_max            = 32,
 918         .fifo_size              = 256,
 919 };
 920
 921 static int rsnd_pcm_open(struct snd_pcm_substream *substream)
 922 {
 923         struct snd_pcm_runtime *runtime = substream->runtime;
 924         int ret = 0;
 925
 926         snd_soc_set_runtime_hwparams(substream, &rsnd_pcm_hardware);
 927
 928         ret = snd_pcm_hw_constraint_integer(runtime,
 929                                             SNDRV_PCM_HW_PARAM_PERIODS);
 930
 931         return ret;
 932 }
 933
 934 static int rsnd_hw_params(struct snd_pcm_substream *substream,
 935                          struct snd_pcm_hw_params *hw_params)
 936 {
 937         return snd_pcm_lib_malloc_pages(substream,
 938                                         params_buffer_bytes(hw_params));
 939 }
 940
 941 static snd_pcm_uframes_t rsnd_pointer(struct snd_pcm_substream *substream)
 942 {
 943         struct snd_pcm_runtime *runtime = substream->runtime;
 944         struct snd_soc_dai *dai = rsnd_substream_to_dai(substream);
 945         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
 946         struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream);
 947
 948         return bytes_to_frames(runtime, io->byte_pos);
 949 }
 950
 951 static struct snd_pcm_ops rsnd_pcm_ops = {
 952         .open           = rsnd_pcm_open,
 953         .ioctl          = snd_pcm_lib_ioctl,
 954         .hw_params      = rsnd_hw_params,
 955         .hw_free        = snd_pcm_lib_free_pages,
 956         .pointer        = rsnd_pointer,
 957 };
 958
 959 /*
 960  *              snd_kcontrol
 961  */
 962 #define kcontrol_to_cfg(kctrl) ((struct rsnd_kctrl_cfg *)kctrl->private_value)
 963 static int rsnd_kctrl_info(struct snd_kcontrol *kctrl,
 964                            struct snd_ctl_elem_info *uinfo)
 965 {
 966         struct rsnd_kctrl_cfg *cfg = kcontrol_to_cfg(kctrl);
 967
 968         if (cfg->texts) {
 969                 uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
 970                 uinfo->count = cfg->size;
 971                 uinfo->value.enumerated.items = cfg->max;
 972                 if (uinfo->value.enumerated.item >= cfg->max)
 973                         uinfo->value.enumerated.item = cfg->max - 1;
 974                 strlcpy(uinfo->value.enumerated.name,
 975                         cfg->texts[uinfo->value.enumerated.item],
 976                         sizeof(uinfo->value.enumerated.name));
 977         } else {
 978                 uinfo->count = cfg->size;
 979                 uinfo->value.integer.min = 0;
 980                 uinfo->value.integer.max = cfg->max;
 981                 uinfo->type = (cfg->max == 1) ?
 982                         SNDRV_CTL_ELEM_TYPE_BOOLEAN :
 983                         SNDRV_CTL_ELEM_TYPE_INTEGER;
 984         }
 985
 986         return 0;
 987 }
 988
 989 static int rsnd_kctrl_get(struct snd_kcontrol *kctrl,
 990                           struct snd_ctl_elem_value *uc)
 991 {
 992         struct rsnd_kctrl_cfg *cfg = kcontrol_to_cfg(kctrl);
 993         int i;
 994
 995         for (i = 0; i < cfg->size; i++)
 996                 if (cfg->texts)
 997                         uc->value.enumerated.item[i] = cfg->val[i];
 998                 else
 999                         uc->value.integer.value[i] = cfg->val[i];
1000
1001         return 0;
1002 }
1003
1004 static int rsnd_kctrl_put(struct snd_kcontrol *kctrl,
1005                           struct snd_ctl_elem_value *uc)
1006 {
1007         struct rsnd_mod *mod = snd_kcontrol_chip(kctrl);
1008         struct rsnd_kctrl_cfg *cfg = kcontrol_to_cfg(kctrl);
1009         int i, change = 0;
1010
1011         for (i = 0; i < cfg->size; i++) {
1012                 if (cfg->texts) {
1013                         change |= (uc->value.enumerated.item[i] != cfg->val[i]);
1014                         cfg->val[i] = uc->value.enumerated.item[i];
1015                 } else {
1016                         change |= (uc->value.integer.value[i] != cfg->val[i]);
1017                         cfg->val[i] = uc->value.integer.value[i];
1018                 }
1019         }
1020
1021         if (change)
1022                 cfg->update(mod);
1023
1024         return change;
1025 }
1026
1027 static int __rsnd_kctrl_new(struct rsnd_mod *mod,
1028                             struct rsnd_dai *rdai,
1029                             struct snd_soc_pcm_runtime *rtd,
1030                             const unsigned char *name,
1031                             struct rsnd_kctrl_cfg *cfg,
1032                             void (*update)(struct rsnd_mod *mod))
1033 {
1034         struct snd_card *card = rtd->card->snd_card;
1035         struct snd_kcontrol *kctrl;
1036         struct snd_kcontrol_new knew = {
1037                 .iface          = SNDRV_CTL_ELEM_IFACE_MIXER,
1038                 .name           = name,
1039                 .info           = rsnd_kctrl_info,
1040                 .get            = rsnd_kctrl_get,
1041                 .put            = rsnd_kctrl_put,
1042                 .private_value  = (unsigned long)cfg,
1043         };
1044         int ret;
1045
1046         kctrl = snd_ctl_new1(&knew, mod);
1047         if (!kctrl)
1048                 return -ENOMEM;
1049
1050         ret = snd_ctl_add(card, kctrl);
1051         if (ret < 0)
1052                 return ret;
1053
1054         cfg->update = update;
1055
1056         return 0;
1057 }
1058
1059 int rsnd_kctrl_new_m(struct rsnd_mod *mod,
1060                      struct rsnd_dai *rdai,
1061                      struct snd_soc_pcm_runtime *rtd,
1062                      const unsigned char *name,
1063                      void (*update)(struct rsnd_mod *mod),
1064                      struct rsnd_kctrl_cfg_m *_cfg,
1065                      u32 max)
1066 {
1067         _cfg->cfg.max   = max;
1068         _cfg->cfg.size  = RSND_DVC_CHANNELS;
1069         _cfg->cfg.val   = _cfg->val;
1070         return __rsnd_kctrl_new(mod, rdai, rtd, name, &_cfg->cfg, update);
1071 }
1072
1073 int rsnd_kctrl_new_s(struct rsnd_mod *mod,
1074                      struct rsnd_dai *rdai,
1075                      struct snd_soc_pcm_runtime *rtd,
1076                      const unsigned char *name,
1077                      void (*update)(struct rsnd_mod *mod),
1078                      struct rsnd_kctrl_cfg_s *_cfg,
1079                      u32 max)
1080 {
1081         _cfg->cfg.max   = max;
1082         _cfg->cfg.size  = 1;
1083         _cfg->cfg.val   = &_cfg->val;
1084         return __rsnd_kctrl_new(mod, rdai, rtd, name, &_cfg->cfg, update);
1085 }
1086
1087 int rsnd_kctrl_new_e(struct rsnd_mod *mod,
1088                      struct rsnd_dai *rdai,
1089                      struct snd_soc_pcm_runtime *rtd,
1090                      const unsigned char *name,
1091                      struct rsnd_kctrl_cfg_s *_cfg,
1092                      void (*update)(struct rsnd_mod *mod),
1093                      const char * const *texts,
1094                      u32 max)
1095 {
1096         _cfg->cfg.max   = max;
1097         _cfg->cfg.size  = 1;
1098         _cfg->cfg.val   = &_cfg->val;
1099         _cfg->cfg.texts = texts;
1100         return __rsnd_kctrl_new(mod, rdai, rtd, name, &_cfg->cfg, update);
1101 }
1102
1103 /*
1104  *              snd_soc_platform
1105  */
1106
1107 #define PREALLOC_BUFFER         (32 * 1024)
1108 #define PREALLOC_BUFFER_MAX     (32 * 1024)
1109
1110 static int rsnd_pcm_new(struct snd_soc_pcm_runtime *rtd)
1111 {
1112         struct snd_soc_dai *dai = rtd->cpu_dai;
1113         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
1114         int ret;
1115
1116         ret = rsnd_dai_call(pcm_new, &rdai->playback, rdai, rtd);
1117         if (ret)
1118                 return ret;
1119
1120         ret = rsnd_dai_call(pcm_new, &rdai->capture, rdai, rtd);
1121         if (ret)
1122                 return ret;
1123
1124         return snd_pcm_lib_preallocate_pages_for_all(
1125                 rtd->pcm,
1126                 SNDRV_DMA_TYPE_DEV,
1127                 rtd->card->snd_card->dev,
1128                 PREALLOC_BUFFER, PREALLOC_BUFFER_MAX);
1129 }
1130
1131 static struct snd_soc_platform_driver rsnd_soc_platform = {
1132         .ops            = &rsnd_pcm_ops,
1133         .pcm_new        = rsnd_pcm_new,
1134 };
1135
1136 static const struct snd_soc_component_driver rsnd_soc_component = {
1137         .name           = "rsnd",
1138 };
1139
1140 static int rsnd_rdai_continuance_probe(struct rsnd_priv *priv,
1141                                        struct rsnd_dai *rdai,
1142                                        int is_play)
1143 {
1144         struct rsnd_dai_stream *io = is_play ? &rdai->playback : &rdai->capture;
1145         int ret;
1146
1147         ret = rsnd_dai_call(probe, io, rdai);
1148         if (ret == -EAGAIN) {
1149                 /*
1150                  * Fallback to PIO mode
1151                  */
1152
1153                 /*
1154                  * call "remove" for SSI/SRC/DVC
1155                  * SSI will be switch to PIO mode if it was DMA mode
1156                  * see
1157                  *      rsnd_dma_init()
1158                  *      rsnd_ssi_fallback()
1159                  */
1160                 rsnd_dai_call(remove, io, rdai);
1161
1162                 /*
1163                  * remove SRC/DVC from DAI,
1164                  */
1165                 rsnd_path_break(priv, io, src);
1166                 rsnd_path_break(priv, io, dvc);
1167
1168                 /*
1169                  * fallback
1170                  */
1171                 rsnd_dai_call(fallback, io, rdai);
1172
1173                 /*
1174                  * retry to "probe".
1175                  * DAI has SSI which is PIO mode only now.
1176                  */
1177                 ret = rsnd_dai_call(probe, io, rdai);
1178         }
1179
1180         return ret;
1181 }
1182
1183 /*
1184  *      rsnd probe
1185  */
1186 static int rsnd_probe(struct platform_device *pdev)
1187 {
1188         struct rcar_snd_info *info;
1189         struct rsnd_priv *priv;
1190         struct device *dev = &pdev->dev;
1191         struct rsnd_dai *rdai;
1192         const struct of_device_id *of_id = of_match_device(rsnd_of_match, dev);
1193         const struct rsnd_of_data *of_data;
1194         int (*probe_func[])(struct platform_device *pdev,
1195                             const struct rsnd_of_data *of_data,
1196                             struct rsnd_priv *priv) = {
1197                 rsnd_gen_probe,
1198                 rsnd_ssi_probe,
1199                 rsnd_src_probe,
1200                 rsnd_dvc_probe,
1201                 rsnd_adg_probe,
1202                 rsnd_dai_probe,
1203         };
1204         int ret, i;
1205
1206         info = NULL;
1207         of_data = NULL;
1208         if (of_id) {
1209                 info = devm_kzalloc(&pdev->dev,
1210                                     sizeof(struct rcar_snd_info), GFP_KERNEL);
1211                 of_data = of_id->data;
1212         } else {
1213                 info = pdev->dev.platform_data;
1214         }
1215
1216         if (!info) {
1217                 dev_err(dev, "driver needs R-Car sound information\n");
1218                 return -ENODEV;
1219         }
1220
1221         /*
1222          *      init priv data
1223          */
1224         priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
1225         if (!priv) {
1226                 dev_err(dev, "priv allocate failed\n");
1227                 return -ENODEV;
1228         }
1229
1230         priv->pdev      = pdev;
1231         priv->info      = info;
1232         spin_lock_init(&priv->lock);
1233
1234         /*
1235          *      init each module
1236          */
1237         for (i = 0; i < ARRAY_SIZE(probe_func); i++) {
1238                 ret = probe_func[i](pdev, of_data, priv);
1239                 if (ret)
1240                         return ret;
1241         }
1242
1243         for_each_rsnd_dai(rdai, priv, i) {
1244                 ret = rsnd_rdai_continuance_probe(priv, rdai, 1);
1245                 if (ret)
1246                         goto exit_snd_probe;
1247
1248                 ret = rsnd_rdai_continuance_probe(priv, rdai, 0);
1249                 if (ret)
1250                         goto exit_snd_probe;
1251         }
1252
1253         /*
1254          *      asoc register
1255          */
1256         ret = snd_soc_register_platform(dev, &rsnd_soc_platform);
1257         if (ret < 0) {
1258                 dev_err(dev, "cannot snd soc register\n");
1259                 return ret;
1260         }
1261
1262         ret = snd_soc_register_component(dev, &rsnd_soc_component,
1263                                          priv->daidrv, rsnd_rdai_nr(priv));
1264         if (ret < 0) {
1265                 dev_err(dev, "cannot snd dai register\n");
1266                 goto exit_snd_soc;
1267         }
1268
1269         dev_set_drvdata(dev, priv);
1270
1271         pm_runtime_enable(dev);
1272
1273         dev_info(dev, "probed\n");
1274         return ret;
1275
1276 exit_snd_soc:
1277         snd_soc_unregister_platform(dev);
1278 exit_snd_probe:
1279         for_each_rsnd_dai(rdai, priv, i) {
1280                 rsnd_dai_call(remove, &rdai->playback, rdai);
1281                 rsnd_dai_call(remove, &rdai->capture, rdai);
1282         }
1283
1284         return ret;
1285 }
1286
1287 static int rsnd_remove(struct platform_device *pdev)
1288 {
1289         struct rsnd_priv *priv = dev_get_drvdata(&pdev->dev);
1290         struct rsnd_dai *rdai;
1291         int ret = 0, i;
1292
1293         pm_runtime_disable(&pdev->dev);
1294
1295         for_each_rsnd_dai(rdai, priv, i) {
1296                 ret |= rsnd_dai_call(remove, &rdai->playback, rdai);
1297                 ret |= rsnd_dai_call(remove, &rdai->capture, rdai);
1298         }
1299
1300         return ret;
1301 }
1302
1303 static struct platform_driver rsnd_driver = {
1304         .driver = {
1305                 .name   = "rcar_sound",
1306                 .of_match_table = rsnd_of_match,
1307         },
1308         .probe          = rsnd_probe,
1309         .remove         = rsnd_remove,
1310 };
1311 module_platform_driver(rsnd_driver);
1312
1313 MODULE_LICENSE("GPL");
1314 MODULE_DESCRIPTION("Renesas R-Car audio driver");
1315 MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");
1316 MODULE_ALIAS("platform:rcar-pcm-audio");