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_mod *mod,
 153                    struct rsnd_mod_ops *ops,
 154                    struct clk *clk,
 155                    enum rsnd_mod_type type,
 156                    int id)
 157 {
 158         mod->id         = id;
 159         mod->ops        = ops;
 160         mod->type       = type;
 161         mod->clk        = clk;
 162 }
 163
 164 /*
 165  *      rsnd_dma functions
 166  */
 167 void rsnd_dma_stop(struct rsnd_dma *dma)
 168 {
 169         dmaengine_terminate_all(dma->chan);
 170 }
 171
 172 static void rsnd_dma_complete(void *data)
 173 {
 174         struct rsnd_dma *dma = (struct rsnd_dma *)data;
 175         struct rsnd_mod *mod = rsnd_dma_to_mod(dma);
 176         struct rsnd_dai_stream *io = rsnd_mod_to_io(mod);
 177
 178         /*
 179          * Renesas sound Gen1 needs 1 DMAC,
 180          * Gen2 needs 2 DMAC.
 181          * In Gen2 case, it are Audio-DMAC, and Audio-DMAC-peri-peri.
 182          * But, Audio-DMAC-peri-peri doesn't have interrupt,
 183          * and this driver is assuming that here.
 184          *
 185          * If Audio-DMAC-peri-peri has interrpt,
 186          * rsnd_dai_pointer_update() will be called twice,
 187          * ant it will breaks io->byte_pos
 188          */
 189
 190         rsnd_dai_pointer_update(io, io->byte_per_period);
 191 }
 192
 193 void rsnd_dma_start(struct rsnd_dma *dma)
 194 {
 195         struct rsnd_mod *mod = rsnd_dma_to_mod(dma);
 196         struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
 197         struct rsnd_dai_stream *io = rsnd_mod_to_io(mod);
 198         struct snd_pcm_substream *substream = io->substream;
 199         struct device *dev = rsnd_priv_to_dev(priv);
 200         struct dma_async_tx_descriptor *desc;
 201
 202         desc = dmaengine_prep_dma_cyclic(dma->chan,
 203                                          (dma->addr) ? dma->addr :
 204                                          substream->runtime->dma_addr,
 205                                          snd_pcm_lib_buffer_bytes(substream),
 206                                          snd_pcm_lib_period_bytes(substream),
 207                                          dma->dir,
 208                                          DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
 209
 210         if (!desc) {
 211                 dev_err(dev, "dmaengine_prep_slave_sg() fail\n");
 212                 return;
 213         }
 214
 215         desc->callback          = rsnd_dma_complete;
 216         desc->callback_param    = dma;
 217
 218         if (dmaengine_submit(desc) < 0) {
 219                 dev_err(dev, "dmaengine_submit() fail\n");
 220                 return;
 221         }
 222
 223         dma_async_issue_pending(dma->chan);
 224 }
 225
 226 int rsnd_dma_available(struct rsnd_dma *dma)
 227 {
 228         return !!dma->chan;
 229 }
 230
 231 #define DMA_NAME_SIZE 16
 232 #define MOD_MAX 4 /* MEM/SSI/SRC/DVC */
 233 static int _rsnd_dma_of_name(char *dma_name, struct rsnd_mod *mod)
 234 {
 235         if (mod)
 236                 return snprintf(dma_name, DMA_NAME_SIZE / 2, "%s%d",
 237                          rsnd_mod_dma_name(mod), rsnd_mod_id(mod));
 238         else
 239                 return snprintf(dma_name, DMA_NAME_SIZE / 2, "mem");
 240
 241 }
 242
 243 static void rsnd_dma_of_name(struct rsnd_mod *mod_from,
 244                              struct rsnd_mod *mod_to,
 245                              char *dma_name)
 246 {
 247         int index = 0;
 248
 249         index = _rsnd_dma_of_name(dma_name + index, mod_from);
 250         *(dma_name + index++) = '_';
 251         index = _rsnd_dma_of_name(dma_name + index, mod_to);
 252 }
 253
 254 static void rsnd_dma_of_path(struct rsnd_dma *dma,
 255                              int is_play,
 256                              struct rsnd_mod **mod_from,
 257                              struct rsnd_mod **mod_to)
 258 {
 259         struct rsnd_mod *this = rsnd_dma_to_mod(dma);
 260         struct rsnd_dai_stream *io = rsnd_mod_to_io(this);
 261         struct rsnd_mod *ssi = rsnd_io_to_mod_ssi(io);
 262         struct rsnd_mod *src = rsnd_io_to_mod_src(io);
 263         struct rsnd_mod *dvc = rsnd_io_to_mod_dvc(io);
 264         struct rsnd_mod *mod[MOD_MAX];
 265         int i, index;
 266
 267
 268         for (i = 0; i < MOD_MAX; i++)
 269                 mod[i] = NULL;
 270
 271         /*
 272          * in play case...
 273          *
 274          * src -> dst
 275          *
 276          * mem -> SSI
 277          * mem -> SRC -> SSI
 278          * mem -> SRC -> DVC -> SSI
 279          */
 280         mod[0] = NULL; /* for "mem" */
 281         index = 1;
 282         for (i = 1; i < MOD_MAX; i++) {
 283                 if (!src) {
 284                         mod[i] = ssi;
 285                 } else if (!dvc) {
 286                         mod[i] = src;
 287                         src = NULL;
 288                 } else {
 289                         if ((!is_play) && (this == src))
 290                                 this = dvc;
 291
 292                         mod[i] = (is_play) ? src : dvc;
 293                         i++;
 294                         mod[i] = (is_play) ? dvc : src;
 295                         src = NULL;
 296                         dvc = NULL;
 297                 }
 298
 299                 if (mod[i] == this)
 300                         index = i;
 301
 302                 if (mod[i] == ssi)
 303                         break;
 304         }
 305
 306         if (is_play) {
 307                 *mod_from = mod[index - 1];
 308                 *mod_to   = mod[index];
 309         } else {
 310                 *mod_from = mod[index];
 311                 *mod_to   = mod[index - 1];
 312         }
 313 }
 314
 315 int rsnd_dma_init(struct rsnd_priv *priv, struct rsnd_dma *dma,
 316                   int is_play, int id)
 317 {
 318         struct device *dev = rsnd_priv_to_dev(priv);
 319         struct dma_slave_config cfg;
 320         struct rsnd_mod *mod_from;
 321         struct rsnd_mod *mod_to;
 322         char dma_name[DMA_NAME_SIZE];
 323         dma_cap_mask_t mask;
 324         int ret;
 325
 326         if (dma->chan) {
 327                 dev_err(dev, "it already has dma channel\n");
 328                 return -EIO;
 329         }
 330
 331         dma_cap_zero(mask);
 332         dma_cap_set(DMA_SLAVE, mask);
 333
 334         rsnd_dma_of_path(dma, is_play, &mod_from, &mod_to);
 335         rsnd_dma_of_name(mod_from, mod_to, dma_name);
 336
 337         cfg.slave_id    = id;
 338         cfg.direction   = is_play ? DMA_MEM_TO_DEV : DMA_DEV_TO_MEM;
 339         cfg.src_addr    = rsnd_gen_dma_addr(priv, mod_from, is_play, 1);
 340         cfg.dst_addr    = rsnd_gen_dma_addr(priv, mod_to,   is_play, 0);
 341         cfg.src_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
 342         cfg.dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
 343
 344         dev_dbg(dev, "dma : %s %pad -> %pad\n",
 345                 dma_name, &cfg.src_addr, &cfg.dst_addr);
 346
 347         dma->chan = dma_request_slave_channel_compat(mask, shdma_chan_filter,
 348                                                      (void *)id, dev,
 349                                                      dma_name);
 350         if (!dma->chan) {
 351                 dev_err(dev, "can't get dma channel\n");
 352                 goto rsnd_dma_channel_err;
 353         }
 354
 355         ret = dmaengine_slave_config(dma->chan, &cfg);
 356         if (ret < 0)
 357                 goto rsnd_dma_init_err;
 358
 359         dma->addr = is_play ? cfg.src_addr : cfg.dst_addr;
 360         dma->dir = is_play ? DMA_MEM_TO_DEV : DMA_DEV_TO_MEM;
 361
 362         return 0;
 363
 364 rsnd_dma_init_err:
 365         rsnd_dma_quit(priv, dma);
 366 rsnd_dma_channel_err:
 367
 368         /*
 369          * DMA failed. try to PIO mode
 370          * see
 371          *      rsnd_ssi_fallback()
 372          *      rsnd_rdai_continuance_probe()
 373          */
 374         return -EAGAIN;
 375 }
 376
 377 void  rsnd_dma_quit(struct rsnd_priv *priv,
 378                     struct rsnd_dma *dma)
 379 {
 380         if (dma->chan)
 381                 dma_release_channel(dma->chan);
 382
 383         dma->chan = NULL;
 384 }
 385
 386 /*
 387  *      settting function
 388  */
 389 u32 rsnd_get_adinr(struct rsnd_mod *mod)
 390 {
 391         struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
 392         struct rsnd_dai_stream *io = rsnd_mod_to_io(mod);
 393         struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
 394         struct device *dev = rsnd_priv_to_dev(priv);
 395         u32 adinr = runtime->channels;
 396
 397         switch (runtime->sample_bits) {
 398         case 16:
 399                 adinr |= (8 << 16);
 400                 break;
 401         case 32:
 402                 adinr |= (0 << 16);
 403                 break;
 404         default:
 405                 dev_warn(dev, "not supported sample bits\n");
 406                 return 0;
 407         }
 408
 409         return adinr;
 410 }
 411
 412 /*
 413  *      rsnd_dai functions
 414  */
 415 #define __rsnd_mod_call(mod, func, param...)                    \
 416 ({                                                              \
 417         struct rsnd_priv *priv = rsnd_mod_to_priv(mod);         \
 418         struct device *dev = rsnd_priv_to_dev(priv);            \
 419         u32 mask = 1 << __rsnd_mod_shift_##func;                        \
 420         u32 call = __rsnd_mod_call_##func << __rsnd_mod_shift_##func;   \
 421         int ret = 0;                                                    \
 422         if ((mod->status & mask) == call) {                             \
 423                 dev_dbg(dev, "%s[%d] %s\n",                             \
 424                         rsnd_mod_name(mod), rsnd_mod_id(mod), #func);   \
 425                 ret = (mod)->ops->func(mod, param);                     \
 426                 mod->status = (mod->status & ~mask) | (~call & mask);   \
 427         }                                                               \
 428         ret;                                                            \
 429 })
 430
 431 #define rsnd_mod_call(mod, func, param...)      \
 432         (!(mod) ? -ENODEV :                     \
 433          !((mod)->ops->func) ? 0 :              \
 434          __rsnd_mod_call(mod, func, param))
 435
 436 #define rsnd_dai_call(fn, io, param...)                         \
 437 ({                                                              \
 438         struct rsnd_mod *mod;                                   \
 439         int ret = 0, i;                                         \
 440         for (i = 0; i < RSND_MOD_MAX; i++) {                    \
 441                 mod = (io)->mod[i];                             \
 442                 if (!mod)                                       \
 443                         continue;                               \
 444                 ret = rsnd_mod_call(mod, fn, param);            \
 445                 if (ret < 0)                                    \
 446                         break;                                  \
 447         }                                                       \
 448         ret;                                                    \
 449 })
 450
 451 static int rsnd_dai_connect(struct rsnd_mod *mod,
 452                             struct rsnd_dai_stream *io)
 453 {
 454         if (!mod)
 455                 return -EIO;
 456
 457         if (io->mod[mod->type]) {
 458                 struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
 459                 struct device *dev = rsnd_priv_to_dev(priv);
 460
 461                 dev_err(dev, "%s%d is not empty\n",
 462                         rsnd_mod_name(mod),
 463                         rsnd_mod_id(mod));
 464                 return -EIO;
 465         }
 466
 467         io->mod[mod->type] = mod;
 468         mod->io = io;
 469
 470         return 0;
 471 }
 472
 473 static void rsnd_dai_disconnect(struct rsnd_mod *mod,
 474                                 struct rsnd_dai_stream *io)
 475 {
 476         mod->io = NULL;
 477         io->mod[mod->type] = NULL;
 478 }
 479
 480 struct rsnd_dai *rsnd_rdai_get(struct rsnd_priv *priv, int id)
 481 {
 482         if ((id < 0) || (id >= rsnd_rdai_nr(priv)))
 483                 return NULL;
 484
 485         return priv->rdai + id;
 486 }
 487
 488 static struct rsnd_dai *rsnd_dai_to_rdai(struct snd_soc_dai *dai)
 489 {
 490         struct rsnd_priv *priv = snd_soc_dai_get_drvdata(dai);
 491
 492         return rsnd_rdai_get(priv, dai->id);
 493 }
 494
 495 /*
 496  *      rsnd_soc_dai functions
 497  */
 498 int rsnd_dai_pointer_offset(struct rsnd_dai_stream *io, int additional)
 499 {
 500         struct snd_pcm_substream *substream = io->substream;
 501         struct snd_pcm_runtime *runtime = substream->runtime;
 502         int pos = io->byte_pos + additional;
 503
 504         pos %= (runtime->periods * io->byte_per_period);
 505
 506         return pos;
 507 }
 508
 509 void rsnd_dai_pointer_update(struct rsnd_dai_stream *io, int byte)
 510 {
 511         io->byte_pos += byte;
 512
 513         if (io->byte_pos >= io->next_period_byte) {
 514                 struct snd_pcm_substream *substream = io->substream;
 515                 struct snd_pcm_runtime *runtime = substream->runtime;
 516
 517                 io->period_pos++;
 518                 io->next_period_byte += io->byte_per_period;
 519
 520                 if (io->period_pos >= runtime->periods) {
 521                         io->byte_pos = 0;
 522                         io->period_pos = 0;
 523                         io->next_period_byte = io->byte_per_period;
 524                 }
 525
 526                 snd_pcm_period_elapsed(substream);
 527         }
 528 }
 529
 530 static int rsnd_dai_stream_init(struct rsnd_dai_stream *io,
 531                                 struct snd_pcm_substream *substream)
 532 {
 533         struct snd_pcm_runtime *runtime = substream->runtime;
 534
 535         io->substream           = substream;
 536         io->byte_pos            = 0;
 537         io->period_pos          = 0;
 538         io->byte_per_period     = runtime->period_size *
 539                                   runtime->channels *
 540                                   samples_to_bytes(runtime, 1);
 541         io->next_period_byte    = io->byte_per_period;
 542
 543         return 0;
 544 }
 545
 546 static
 547 struct snd_soc_dai *rsnd_substream_to_dai(struct snd_pcm_substream *substream)
 548 {
 549         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 550
 551         return  rtd->cpu_dai;
 552 }
 553
 554 static
 555 struct rsnd_dai_stream *rsnd_rdai_to_io(struct rsnd_dai *rdai,
 556                                         struct snd_pcm_substream *substream)
 557 {
 558         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 559                 return &rdai->playback;
 560         else
 561                 return &rdai->capture;
 562 }
 563
 564 static int rsnd_soc_dai_trigger(struct snd_pcm_substream *substream, int cmd,
 565                             struct snd_soc_dai *dai)
 566 {
 567         struct rsnd_priv *priv = snd_soc_dai_get_drvdata(dai);
 568         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
 569         struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream);
 570         int ssi_id = rsnd_mod_id(rsnd_io_to_mod_ssi(io));
 571         int ret;
 572         unsigned long flags;
 573
 574         rsnd_lock(priv, flags);
 575
 576         switch (cmd) {
 577         case SNDRV_PCM_TRIGGER_START:
 578                 ret = rsnd_dai_stream_init(io, substream);
 579                 if (ret < 0)
 580                         goto dai_trigger_end;
 581
 582                 ret = rsnd_platform_call(priv, dai, start, ssi_id);
 583                 if (ret < 0)
 584                         goto dai_trigger_end;
 585
 586                 ret = rsnd_dai_call(init, io, priv);
 587                 if (ret < 0)
 588                         goto dai_trigger_end;
 589
 590                 ret = rsnd_dai_call(start, io, priv);
 591                 if (ret < 0)
 592                         goto dai_trigger_end;
 593                 break;
 594         case SNDRV_PCM_TRIGGER_STOP:
 595                 ret = rsnd_dai_call(stop, io, priv);
 596                 if (ret < 0)
 597                         goto dai_trigger_end;
 598
 599                 ret = rsnd_dai_call(quit, io, priv);
 600                 if (ret < 0)
 601                         goto dai_trigger_end;
 602
 603                 ret = rsnd_platform_call(priv, dai, stop, ssi_id);
 604                 if (ret < 0)
 605                         goto dai_trigger_end;
 606                 break;
 607         default:
 608                 ret = -EINVAL;
 609         }
 610
 611 dai_trigger_end:
 612         rsnd_unlock(priv, flags);
 613
 614         return ret;
 615 }
 616
 617 static int rsnd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
 618 {
 619         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
 620
 621         /* set master/slave audio interface */
 622         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 623         case SND_SOC_DAIFMT_CBM_CFM:
 624                 rdai->clk_master = 0;
 625                 break;
 626         case SND_SOC_DAIFMT_CBS_CFS:
 627                 rdai->clk_master = 1; /* codec is slave, cpu is master */
 628                 break;
 629         default:
 630                 return -EINVAL;
 631         }
 632
 633         /* set format */
 634         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 635         case SND_SOC_DAIFMT_I2S:
 636                 rdai->sys_delay = 0;
 637                 rdai->data_alignment = 0;
 638                 rdai->frm_clk_inv = 0;
 639                 break;
 640         case SND_SOC_DAIFMT_LEFT_J:
 641                 rdai->sys_delay = 1;
 642                 rdai->data_alignment = 0;
 643                 rdai->frm_clk_inv = 1;
 644                 break;
 645         case SND_SOC_DAIFMT_RIGHT_J:
 646                 rdai->sys_delay = 1;
 647                 rdai->data_alignment = 1;
 648                 rdai->frm_clk_inv = 1;
 649                 break;
 650         }
 651
 652         /* set clock inversion */
 653         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
 654         case SND_SOC_DAIFMT_NB_IF:
 655                 rdai->bit_clk_inv =  rdai->bit_clk_inv;
 656                 rdai->frm_clk_inv = !rdai->frm_clk_inv;
 657                 break;
 658         case SND_SOC_DAIFMT_IB_NF:
 659                 rdai->bit_clk_inv = !rdai->bit_clk_inv;
 660                 rdai->frm_clk_inv =  rdai->frm_clk_inv;
 661                 break;
 662         case SND_SOC_DAIFMT_IB_IF:
 663                 rdai->bit_clk_inv = !rdai->bit_clk_inv;
 664                 rdai->frm_clk_inv = !rdai->frm_clk_inv;
 665                 break;
 666         case SND_SOC_DAIFMT_NB_NF:
 667         default:
 668                 break;
 669         }
 670
 671         return 0;
 672 }
 673
 674 static const struct snd_soc_dai_ops rsnd_soc_dai_ops = {
 675         .trigger        = rsnd_soc_dai_trigger,
 676         .set_fmt        = rsnd_soc_dai_set_fmt,
 677 };
 678
 679 #define rsnd_path_parse(priv, io, type)                         \
 680 ({                                                              \
 681         struct rsnd_mod *mod;                                   \
 682         int ret = 0;                                            \
 683         int id = -1;                                            \
 684                                                                 \
 685         if (rsnd_is_enable_path(io, type)) {                    \
 686                 id = rsnd_info_id(priv, io, type);              \
 687                 if (id >= 0) {                                  \
 688                         mod = rsnd_##type##_mod_get(priv, id);  \
 689                         ret = rsnd_dai_connect(mod, io);        \
 690                 }                                               \
 691         }                                                       \
 692         ret;                                                    \
 693 })
 694
 695 #define rsnd_path_break(priv, io, type)                         \
 696 {                                                               \
 697         struct rsnd_mod *mod;                                   \
 698         int id = -1;                                            \
 699                                                                 \
 700         if (rsnd_is_enable_path(io, type)) {                    \
 701                 id = rsnd_info_id(priv, io, type);              \
 702                 if (id >= 0) {                                  \
 703                         mod = rsnd_##type##_mod_get(priv, id);  \
 704                         rsnd_dai_disconnect(mod, io);           \
 705                 }                                               \
 706         }                                                       \
 707 }
 708
 709 static int rsnd_path_init(struct rsnd_priv *priv,
 710                           struct rsnd_dai *rdai,
 711                           struct rsnd_dai_stream *io)
 712 {
 713         int ret;
 714
 715         /*
 716          * Gen1 is created by SRU/SSI, and this SRU is base module of
 717          * Gen2's SCU/SSIU/SSI. (Gen2 SCU/SSIU came from SRU)
 718          *
 719          * Easy image is..
 720          *      Gen1 SRU = Gen2 SCU + SSIU + etc
 721          *
 722          * Gen2 SCU path is very flexible, but, Gen1 SRU (SCU parts) is
 723          * using fixed path.
 724          */
 725
 726         /* SRC */
 727         ret = rsnd_path_parse(priv, io, src);
 728         if (ret < 0)
 729                 return ret;
 730
 731         /* SSI */
 732         ret = rsnd_path_parse(priv, io, ssi);
 733         if (ret < 0)
 734                 return ret;
 735
 736         /* DVC */
 737         ret = rsnd_path_parse(priv, io, dvc);
 738         if (ret < 0)
 739                 return ret;
 740
 741         return ret;
 742 }
 743
 744 static void rsnd_of_parse_dai(struct platform_device *pdev,
 745                               const struct rsnd_of_data *of_data,
 746                               struct rsnd_priv *priv)
 747 {
 748         struct device_node *dai_node,   *dai_np;
 749         struct device_node *ssi_node,   *ssi_np;
 750         struct device_node *src_node,   *src_np;
 751         struct device_node *dvc_node,   *dvc_np;
 752         struct device_node *playback, *capture;
 753         struct rsnd_dai_platform_info *dai_info;
 754         struct rcar_snd_info *info = rsnd_priv_to_info(priv);
 755         struct device *dev = &pdev->dev;
 756         int nr, i;
 757         int dai_i, ssi_i, src_i, dvc_i;
 758
 759         if (!of_data)
 760                 return;
 761
 762         dai_node = of_get_child_by_name(dev->of_node, "rcar_sound,dai");
 763         if (!dai_node)
 764                 return;
 765
 766         nr = of_get_child_count(dai_node);
 767         if (!nr)
 768                 return;
 769
 770         dai_info = devm_kzalloc(dev,
 771                                 sizeof(struct rsnd_dai_platform_info) * nr,
 772                                 GFP_KERNEL);
 773         if (!dai_info) {
 774                 dev_err(dev, "dai info allocation error\n");
 775                 return;
 776         }
 777
 778         info->dai_info_nr       = nr;
 779         info->dai_info          = dai_info;
 780
 781         ssi_node = of_get_child_by_name(dev->of_node, "rcar_sound,ssi");
 782         src_node = of_get_child_by_name(dev->of_node, "rcar_sound,src");
 783         dvc_node = of_get_child_by_name(dev->of_node, "rcar_sound,dvc");
 784
 785 #define mod_parse(name)                                                 \
 786 if (name##_node) {                                                      \
 787         struct rsnd_##name##_platform_info *name##_info;                \
 788                                                                         \
 789         name##_i = 0;                                                   \
 790         for_each_child_of_node(name##_node, name##_np) {                \
 791                 name##_info = info->name##_info + name##_i;             \
 792                                                                         \
 793                 if (name##_np == playback)                              \
 794                         dai_info->playback.name = name##_info;          \
 795                 if (name##_np == capture)                               \
 796                         dai_info->capture.name = name##_info;           \
 797                                                                         \
 798                 name##_i++;                                             \
 799         }                                                               \
 800 }
 801
 802         /*
 803          * parse all dai
 804          */
 805         dai_i = 0;
 806         for_each_child_of_node(dai_node, dai_np) {
 807                 dai_info = info->dai_info + dai_i;
 808
 809                 for (i = 0;; i++) {
 810
 811                         playback = of_parse_phandle(dai_np, "playback", i);
 812                         capture  = of_parse_phandle(dai_np, "capture", i);
 813
 814                         if (!playback && !capture)
 815                                 break;
 816
 817                         mod_parse(ssi);
 818                         mod_parse(src);
 819                         mod_parse(dvc);
 820
 821                         of_node_put(playback);
 822                         of_node_put(capture);
 823                 }
 824
 825                 dai_i++;
 826         }
 827 }
 828
 829 static int rsnd_dai_probe(struct platform_device *pdev,
 830                           const struct rsnd_of_data *of_data,
 831                           struct rsnd_priv *priv)
 832 {
 833         struct snd_soc_dai_driver *drv;
 834         struct rcar_snd_info *info = rsnd_priv_to_info(priv);
 835         struct rsnd_dai *rdai;
 836         struct rsnd_ssi_platform_info *pmod, *cmod;
 837         struct device *dev = rsnd_priv_to_dev(priv);
 838         int dai_nr;
 839         int i;
 840
 841         rsnd_of_parse_dai(pdev, of_data, priv);
 842
 843         dai_nr = info->dai_info_nr;
 844         if (!dai_nr) {
 845                 dev_err(dev, "no dai\n");
 846                 return -EIO;
 847         }
 848
 849         drv  = devm_kzalloc(dev, sizeof(*drv)  * dai_nr, GFP_KERNEL);
 850         rdai = devm_kzalloc(dev, sizeof(*rdai) * dai_nr, GFP_KERNEL);
 851         if (!drv || !rdai) {
 852                 dev_err(dev, "dai allocate failed\n");
 853                 return -ENOMEM;
 854         }
 855
 856         priv->rdai_nr   = dai_nr;
 857         priv->daidrv    = drv;
 858         priv->rdai      = rdai;
 859
 860         for (i = 0; i < dai_nr; i++) {
 861
 862                 pmod = info->dai_info[i].playback.ssi;
 863                 cmod = info->dai_info[i].capture.ssi;
 864
 865                 /*
 866                  *      init rsnd_dai
 867                  */
 868                 snprintf(rdai[i].name, RSND_DAI_NAME_SIZE, "rsnd-dai.%d", i);
 869                 rdai[i].priv = priv;
 870
 871                 /*
 872                  *      init snd_soc_dai_driver
 873                  */
 874                 drv[i].name     = rdai[i].name;
 875                 drv[i].ops      = &rsnd_soc_dai_ops;
 876                 if (pmod) {
 877                         drv[i].playback.rates           = RSND_RATES;
 878                         drv[i].playback.formats         = RSND_FMTS;
 879                         drv[i].playback.channels_min    = 2;
 880                         drv[i].playback.channels_max    = 2;
 881
 882                         rdai[i].playback.info = &info->dai_info[i].playback;
 883                         rdai[i].playback.rdai = rdai + i;
 884                         rsnd_path_init(priv, &rdai[i], &rdai[i].playback);
 885                 }
 886                 if (cmod) {
 887                         drv[i].capture.rates            = RSND_RATES;
 888                         drv[i].capture.formats          = RSND_FMTS;
 889                         drv[i].capture.channels_min     = 2;
 890                         drv[i].capture.channels_max     = 2;
 891
 892                         rdai[i].capture.info = &info->dai_info[i].capture;
 893                         rdai[i].capture.rdai = rdai + i;
 894                         rsnd_path_init(priv, &rdai[i], &rdai[i].capture);
 895                 }
 896
 897                 dev_dbg(dev, "%s (%s/%s)\n", rdai[i].name,
 898                         pmod ? "play"    : " -- ",
 899                         cmod ? "capture" : "  --   ");
 900         }
 901
 902         return 0;
 903 }
 904
 905 /*
 906  *              pcm ops
 907  */
 908 static struct snd_pcm_hardware rsnd_pcm_hardware = {
 909         .info =         SNDRV_PCM_INFO_INTERLEAVED      |
 910                         SNDRV_PCM_INFO_MMAP             |
 911                         SNDRV_PCM_INFO_MMAP_VALID,
 912         .buffer_bytes_max       = 64 * 1024,
 913         .period_bytes_min       = 32,
 914         .period_bytes_max       = 8192,
 915         .periods_min            = 1,
 916         .periods_max            = 32,
 917         .fifo_size              = 256,
 918 };
 919
 920 static int rsnd_pcm_open(struct snd_pcm_substream *substream)
 921 {
 922         struct snd_pcm_runtime *runtime = substream->runtime;
 923         int ret = 0;
 924
 925         snd_soc_set_runtime_hwparams(substream, &rsnd_pcm_hardware);
 926
 927         ret = snd_pcm_hw_constraint_integer(runtime,
 928                                             SNDRV_PCM_HW_PARAM_PERIODS);
 929
 930         return ret;
 931 }
 932
 933 static int rsnd_hw_params(struct snd_pcm_substream *substream,
 934                          struct snd_pcm_hw_params *hw_params)
 935 {
 936         return snd_pcm_lib_malloc_pages(substream,
 937                                         params_buffer_bytes(hw_params));
 938 }
 939
 940 static snd_pcm_uframes_t rsnd_pointer(struct snd_pcm_substream *substream)
 941 {
 942         struct snd_pcm_runtime *runtime = substream->runtime;
 943         struct snd_soc_dai *dai = rsnd_substream_to_dai(substream);
 944         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
 945         struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream);
 946
 947         return bytes_to_frames(runtime, io->byte_pos);
 948 }
 949
 950 static struct snd_pcm_ops rsnd_pcm_ops = {
 951         .open           = rsnd_pcm_open,
 952         .ioctl          = snd_pcm_lib_ioctl,
 953         .hw_params      = rsnd_hw_params,
 954         .hw_free        = snd_pcm_lib_free_pages,
 955         .pointer        = rsnd_pointer,
 956 };
 957
 958 /*
 959  *              snd_kcontrol
 960  */
 961 #define kcontrol_to_cfg(kctrl) ((struct rsnd_kctrl_cfg *)kctrl->private_value)
 962 static int rsnd_kctrl_info(struct snd_kcontrol *kctrl,
 963                            struct snd_ctl_elem_info *uinfo)
 964 {
 965         struct rsnd_kctrl_cfg *cfg = kcontrol_to_cfg(kctrl);
 966
 967         if (cfg->texts) {
 968                 uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
 969                 uinfo->count = cfg->size;
 970                 uinfo->value.enumerated.items = cfg->max;
 971                 if (uinfo->value.enumerated.item >= cfg->max)
 972                         uinfo->value.enumerated.item = cfg->max - 1;
 973                 strlcpy(uinfo->value.enumerated.name,
 974                         cfg->texts[uinfo->value.enumerated.item],
 975                         sizeof(uinfo->value.enumerated.name));
 976         } else {
 977                 uinfo->count = cfg->size;
 978                 uinfo->value.integer.min = 0;
 979                 uinfo->value.integer.max = cfg->max;
 980                 uinfo->type = (cfg->max == 1) ?
 981                         SNDRV_CTL_ELEM_TYPE_BOOLEAN :
 982                         SNDRV_CTL_ELEM_TYPE_INTEGER;
 983         }
 984
 985         return 0;
 986 }
 987
 988 static int rsnd_kctrl_get(struct snd_kcontrol *kctrl,
 989                           struct snd_ctl_elem_value *uc)
 990 {
 991         struct rsnd_kctrl_cfg *cfg = kcontrol_to_cfg(kctrl);
 992         int i;
 993
 994         for (i = 0; i < cfg->size; i++)
 995                 if (cfg->texts)
 996                         uc->value.enumerated.item[i] = cfg->val[i];
 997                 else
 998                         uc->value.integer.value[i] = cfg->val[i];
 999
1000         return 0;
1001 }
1002
1003 static int rsnd_kctrl_put(struct snd_kcontrol *kctrl,
1004                           struct snd_ctl_elem_value *uc)
1005 {
1006         struct rsnd_mod *mod = snd_kcontrol_chip(kctrl);
1007         struct rsnd_kctrl_cfg *cfg = kcontrol_to_cfg(kctrl);
1008         int i, change = 0;
1009
1010         for (i = 0; i < cfg->size; i++) {
1011                 if (cfg->texts) {
1012                         change |= (uc->value.enumerated.item[i] != cfg->val[i]);
1013                         cfg->val[i] = uc->value.enumerated.item[i];
1014                 } else {
1015                         change |= (uc->value.integer.value[i] != cfg->val[i]);
1016                         cfg->val[i] = uc->value.integer.value[i];
1017                 }
1018         }
1019
1020         if (change)
1021                 cfg->update(mod);
1022
1023         return change;
1024 }
1025
1026 static int __rsnd_kctrl_new(struct rsnd_mod *mod,
1027                             struct snd_soc_pcm_runtime *rtd,
1028                             const unsigned char *name,
1029                             struct rsnd_kctrl_cfg *cfg,
1030                             void (*update)(struct rsnd_mod *mod))
1031 {
1032         struct snd_card *card = rtd->card->snd_card;
1033         struct snd_kcontrol *kctrl;
1034         struct snd_kcontrol_new knew = {
1035                 .iface          = SNDRV_CTL_ELEM_IFACE_MIXER,
1036                 .name           = name,
1037                 .info           = rsnd_kctrl_info,
1038                 .get            = rsnd_kctrl_get,
1039                 .put            = rsnd_kctrl_put,
1040                 .private_value  = (unsigned long)cfg,
1041         };
1042         int ret;
1043
1044         kctrl = snd_ctl_new1(&knew, mod);
1045         if (!kctrl)
1046                 return -ENOMEM;
1047
1048         ret = snd_ctl_add(card, kctrl);
1049         if (ret < 0) {
1050                 snd_ctl_free_one(kctrl);
1051                 return ret;
1052         }
1053
1054         cfg->update = update;
1055         cfg->card = card;
1056         cfg->kctrl = kctrl;
1057
1058         return 0;
1059 }
1060
1061 void _rsnd_kctrl_remove(struct rsnd_kctrl_cfg *cfg)
1062 {
1063         snd_ctl_remove(cfg->card, cfg->kctrl);
1064 }
1065
1066 int rsnd_kctrl_new_m(struct rsnd_mod *mod,
1067                      struct snd_soc_pcm_runtime *rtd,
1068                      const unsigned char *name,
1069                      void (*update)(struct rsnd_mod *mod),
1070                      struct rsnd_kctrl_cfg_m *_cfg,
1071                      u32 max)
1072 {
1073         _cfg->cfg.max   = max;
1074         _cfg->cfg.size  = RSND_DVC_CHANNELS;
1075         _cfg->cfg.val   = _cfg->val;
1076         return __rsnd_kctrl_new(mod, rtd, name, &_cfg->cfg, update);
1077 }
1078
1079 int rsnd_kctrl_new_s(struct rsnd_mod *mod,
1080                      struct snd_soc_pcm_runtime *rtd,
1081                      const unsigned char *name,
1082                      void (*update)(struct rsnd_mod *mod),
1083                      struct rsnd_kctrl_cfg_s *_cfg,
1084                      u32 max)
1085 {
1086         _cfg->cfg.max   = max;
1087         _cfg->cfg.size  = 1;
1088         _cfg->cfg.val   = &_cfg->val;
1089         return __rsnd_kctrl_new(mod, rtd, name, &_cfg->cfg, update);
1090 }
1091
1092 int rsnd_kctrl_new_e(struct rsnd_mod *mod,
1093                      struct snd_soc_pcm_runtime *rtd,
1094                      const unsigned char *name,
1095                      struct rsnd_kctrl_cfg_s *_cfg,
1096                      void (*update)(struct rsnd_mod *mod),
1097                      const char * const *texts,
1098                      u32 max)
1099 {
1100         _cfg->cfg.max   = max;
1101         _cfg->cfg.size  = 1;
1102         _cfg->cfg.val   = &_cfg->val;
1103         _cfg->cfg.texts = texts;
1104         return __rsnd_kctrl_new(mod, rtd, name, &_cfg->cfg, update);
1105 }
1106
1107 /*
1108  *              snd_soc_platform
1109  */
1110
1111 #define PREALLOC_BUFFER         (32 * 1024)
1112 #define PREALLOC_BUFFER_MAX     (32 * 1024)
1113
1114 static int rsnd_pcm_new(struct snd_soc_pcm_runtime *rtd)
1115 {
1116         struct snd_soc_dai *dai = rtd->cpu_dai;
1117         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
1118         int ret;
1119
1120         ret = rsnd_dai_call(pcm_new, &rdai->playback, rtd);
1121         if (ret)
1122                 return ret;
1123
1124         ret = rsnd_dai_call(pcm_new, &rdai->capture, rtd);
1125         if (ret)
1126                 return ret;
1127
1128         return snd_pcm_lib_preallocate_pages_for_all(
1129                 rtd->pcm,
1130                 SNDRV_DMA_TYPE_DEV,
1131                 rtd->card->snd_card->dev,
1132                 PREALLOC_BUFFER, PREALLOC_BUFFER_MAX);
1133 }
1134
1135 static struct snd_soc_platform_driver rsnd_soc_platform = {
1136         .ops            = &rsnd_pcm_ops,
1137         .pcm_new        = rsnd_pcm_new,
1138 };
1139
1140 static const struct snd_soc_component_driver rsnd_soc_component = {
1141         .name           = "rsnd",
1142 };
1143
1144 static int rsnd_rdai_continuance_probe(struct rsnd_priv *priv,
1145                                        struct rsnd_dai_stream *io)
1146 {
1147         int ret;
1148
1149         ret = rsnd_dai_call(probe, io, priv);
1150         if (ret == -EAGAIN) {
1151                 /*
1152                  * Fallback to PIO mode
1153                  */
1154
1155                 /*
1156                  * call "remove" for SSI/SRC/DVC
1157                  * SSI will be switch to PIO mode if it was DMA mode
1158                  * see
1159                  *      rsnd_dma_init()
1160                  *      rsnd_ssi_fallback()
1161                  */
1162                 rsnd_dai_call(remove, io, priv);
1163
1164                 /*
1165                  * remove SRC/DVC from DAI,
1166                  */
1167                 rsnd_path_break(priv, io, src);
1168                 rsnd_path_break(priv, io, dvc);
1169
1170                 /*
1171                  * fallback
1172                  */
1173                 rsnd_dai_call(fallback, io, priv);
1174
1175                 /*
1176                  * retry to "probe".
1177                  * DAI has SSI which is PIO mode only now.
1178                  */
1179                 ret = rsnd_dai_call(probe, io, priv);
1180         }
1181
1182         return ret;
1183 }
1184
1185 /*
1186  *      rsnd probe
1187  */
1188 static int rsnd_probe(struct platform_device *pdev)
1189 {
1190         struct rcar_snd_info *info;
1191         struct rsnd_priv *priv;
1192         struct device *dev = &pdev->dev;
1193         struct rsnd_dai *rdai;
1194         const struct of_device_id *of_id = of_match_device(rsnd_of_match, dev);
1195         const struct rsnd_of_data *of_data;
1196         int (*probe_func[])(struct platform_device *pdev,
1197                             const struct rsnd_of_data *of_data,
1198                             struct rsnd_priv *priv) = {
1199                 rsnd_gen_probe,
1200                 rsnd_ssi_probe,
1201                 rsnd_src_probe,
1202                 rsnd_dvc_probe,
1203                 rsnd_adg_probe,
1204                 rsnd_dai_probe,
1205         };
1206         int ret, i;
1207
1208         info = NULL;
1209         of_data = NULL;
1210         if (of_id) {
1211                 info = devm_kzalloc(&pdev->dev,
1212                                     sizeof(struct rcar_snd_info), GFP_KERNEL);
1213                 of_data = of_id->data;
1214         } else {
1215                 info = pdev->dev.platform_data;
1216         }
1217
1218         if (!info) {
1219                 dev_err(dev, "driver needs R-Car sound information\n");
1220                 return -ENODEV;
1221         }
1222
1223         /*
1224          *      init priv data
1225          */
1226         priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
1227         if (!priv) {
1228                 dev_err(dev, "priv allocate failed\n");
1229                 return -ENODEV;
1230         }
1231
1232         priv->pdev      = pdev;
1233         priv->info      = info;
1234         spin_lock_init(&priv->lock);
1235
1236         /*
1237          *      init each module
1238          */
1239         for (i = 0; i < ARRAY_SIZE(probe_func); i++) {
1240                 ret = probe_func[i](pdev, of_data, priv);
1241                 if (ret)
1242                         return ret;
1243         }
1244
1245         for_each_rsnd_dai(rdai, priv, i) {
1246                 ret = rsnd_rdai_continuance_probe(priv, &rdai->playback);
1247                 if (ret)
1248                         goto exit_snd_probe;
1249
1250                 ret = rsnd_rdai_continuance_probe(priv, &rdai->capture);
1251                 if (ret)
1252                         goto exit_snd_probe;
1253         }
1254
1255         dev_set_drvdata(dev, priv);
1256
1257         /*
1258          *      asoc register
1259          */
1260         ret = snd_soc_register_platform(dev, &rsnd_soc_platform);
1261         if (ret < 0) {
1262                 dev_err(dev, "cannot snd soc register\n");
1263                 return ret;
1264         }
1265
1266         ret = snd_soc_register_component(dev, &rsnd_soc_component,
1267                                          priv->daidrv, rsnd_rdai_nr(priv));
1268         if (ret < 0) {
1269                 dev_err(dev, "cannot snd dai register\n");
1270                 goto exit_snd_soc;
1271         }
1272
1273         pm_runtime_enable(dev);
1274
1275         dev_info(dev, "probed\n");
1276         return ret;
1277
1278 exit_snd_soc:
1279         snd_soc_unregister_platform(dev);
1280 exit_snd_probe:
1281         for_each_rsnd_dai(rdai, priv, i) {
1282                 rsnd_dai_call(remove, &rdai->playback, priv);
1283                 rsnd_dai_call(remove, &rdai->capture, priv);
1284         }
1285
1286         return ret;
1287 }
1288
1289 static int rsnd_remove(struct platform_device *pdev)
1290 {
1291         struct rsnd_priv *priv = dev_get_drvdata(&pdev->dev);
1292         struct rsnd_dai *rdai;
1293         int ret = 0, i;
1294
1295         pm_runtime_disable(&pdev->dev);
1296
1297         for_each_rsnd_dai(rdai, priv, i) {
1298                 ret |= rsnd_dai_call(remove, &rdai->playback, priv);
1299                 ret |= rsnd_dai_call(remove, &rdai->capture, priv);
1300         }
1301
1302         snd_soc_unregister_component(&pdev->dev);
1303         snd_soc_unregister_platform(&pdev->dev);
1304
1305         return ret;
1306 }
1307
1308 static struct platform_driver rsnd_driver = {
1309         .driver = {
1310                 .name   = "rcar_sound",
1311                 .of_match_table = rsnd_of_match,
1312         },
1313         .probe          = rsnd_probe,
1314         .remove         = rsnd_remove,
1315 };
1316 module_platform_driver(rsnd_driver);
1317
1318 MODULE_LICENSE("GPL");
1319 MODULE_DESCRIPTION("Renesas R-Car audio driver");
1320 MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");
1321 MODULE_ALIAS("platform:rcar-pcm-audio");