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 "rsnd.h"
  98
  99 #define RSND_RATES SNDRV_PCM_RATE_8000_192000
 100 #define RSND_FMTS (SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S16_LE)
 101
 102 static const struct of_device_id rsnd_of_match[] = {
 103         { .compatible = "renesas,rcar_sound-gen1", .data = (void *)RSND_GEN1 },
 104         { .compatible = "renesas,rcar_sound-gen2", .data = (void *)RSND_GEN2 },
 105         { .compatible = "renesas,rcar_sound-gen3", .data = (void *)RSND_GEN2 }, /* gen2 compatible */
 106         {},
 107 };
 108 MODULE_DEVICE_TABLE(of, rsnd_of_match);
 109
 110 /*
 111  *      rsnd_mod functions
 112  */
 113 void rsnd_mod_make_sure(struct rsnd_mod *mod, enum rsnd_mod_type type)
 114 {
 115         if (mod->type != type) {
 116                 struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
 117                 struct device *dev = rsnd_priv_to_dev(priv);
 118
 119                 dev_warn(dev, "%s[%d] is not your expected module\n",
 120                          rsnd_mod_name(mod), rsnd_mod_id(mod));
 121         }
 122 }
 123
 124 char *rsnd_mod_name(struct rsnd_mod *mod)
 125 {
 126         if (!mod || !mod->ops)
 127                 return "unknown";
 128
 129         return mod->ops->name;
 130 }
 131
 132 struct dma_chan *rsnd_mod_dma_req(struct rsnd_dai_stream *io,
 133                                   struct rsnd_mod *mod)
 134 {
 135         if (!mod || !mod->ops || !mod->ops->dma_req)
 136                 return NULL;
 137
 138         return mod->ops->dma_req(io, mod);
 139 }
 140
 141 u32 *rsnd_mod_get_status(struct rsnd_dai_stream *io,
 142                          struct rsnd_mod *mod,
 143                          enum rsnd_mod_type type)
 144 {
 145         return &mod->status;
 146 }
 147
 148 int rsnd_mod_init(struct rsnd_priv *priv,
 149                   struct rsnd_mod *mod,
 150                   struct rsnd_mod_ops *ops,
 151                   struct clk *clk,
 152                   u32* (*get_status)(struct rsnd_dai_stream *io,
 153                                      struct rsnd_mod *mod,
 154                                      enum rsnd_mod_type type),
 155                   enum rsnd_mod_type type,
 156                   int id)
 157 {
 158         int ret = clk_prepare(clk);
 159
 160         if (ret)
 161                 return ret;
 162
 163         mod->id         = id;
 164         mod->ops        = ops;
 165         mod->type       = type;
 166         mod->clk        = clk;
 167         mod->priv       = priv;
 168         mod->get_status = get_status;
 169
 170         return ret;
 171 }
 172
 173 void rsnd_mod_quit(struct rsnd_mod *mod)
 174 {
 175         if (mod->clk)
 176                 clk_unprepare(mod->clk);
 177         mod->clk = NULL;
 178 }
 179
 180 void rsnd_mod_interrupt(struct rsnd_mod *mod,
 181                         void (*callback)(struct rsnd_mod *mod,
 182                                          struct rsnd_dai_stream *io))
 183 {
 184         struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
 185         struct rsnd_dai_stream *io;
 186         struct rsnd_dai *rdai;
 187         int i;
 188
 189         for_each_rsnd_dai(rdai, priv, i) {
 190                 io = &rdai->playback;
 191                 if (mod == io->mod[mod->type])
 192                         callback(mod, io);
 193
 194                 io = &rdai->capture;
 195                 if (mod == io->mod[mod->type])
 196                         callback(mod, io);
 197         }
 198 }
 199
 200 int rsnd_io_is_working(struct rsnd_dai_stream *io)
 201 {
 202         /* see rsnd_dai_stream_init/quit() */
 203         return !!io->substream;
 204 }
 205
 206 void rsnd_set_slot(struct rsnd_dai *rdai,
 207                    int slots, int num)
 208 {
 209         rdai->slots     = slots;
 210         rdai->slots_num = num;
 211 }
 212
 213 int rsnd_get_slot(struct rsnd_dai_stream *io)
 214 {
 215         struct rsnd_dai *rdai = rsnd_io_to_rdai(io);
 216
 217         return rdai->slots;
 218 }
 219
 220 int rsnd_get_slot_num(struct rsnd_dai_stream *io)
 221 {
 222         struct rsnd_dai *rdai = rsnd_io_to_rdai(io);
 223
 224         return rdai->slots_num;
 225 }
 226
 227 int rsnd_runtime_channel_original(struct rsnd_dai_stream *io)
 228 {
 229         struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
 230
 231         return runtime->channels;
 232 }
 233
 234 int rsnd_runtime_channel_after_ctu(struct rsnd_dai_stream *io)
 235 {
 236         int chan = rsnd_runtime_channel_original(io);
 237         struct rsnd_mod *ctu_mod = rsnd_io_to_mod_ctu(io);
 238
 239         if (ctu_mod) {
 240                 u32 converted_chan = rsnd_ctu_converted_channel(ctu_mod);
 241
 242                 if (converted_chan)
 243                         return converted_chan;
 244         }
 245
 246         return chan;
 247 }
 248
 249 int rsnd_runtime_channel_for_ssi(struct rsnd_dai_stream *io)
 250 {
 251         int chan = rsnd_io_is_play(io) ?
 252                 rsnd_runtime_channel_after_ctu(io) :
 253                 rsnd_runtime_channel_original(io);
 254
 255         /* Use Multi SSI */
 256         if (rsnd_runtime_is_ssi_multi(io))
 257                 chan /= rsnd_get_slot_num(io);
 258
 259         /* TDM Extend Mode needs 8ch */
 260         if (chan == 6)
 261                 chan = 8;
 262
 263         return chan;
 264 }
 265
 266 int rsnd_runtime_is_ssi_multi(struct rsnd_dai_stream *io)
 267 {
 268         int slots = rsnd_get_slot_num(io);
 269         int chan = rsnd_io_is_play(io) ?
 270                 rsnd_runtime_channel_after_ctu(io) :
 271                 rsnd_runtime_channel_original(io);
 272
 273         return (chan >= 6) && (slots > 1);
 274 }
 275
 276 int rsnd_runtime_is_ssi_tdm(struct rsnd_dai_stream *io)
 277 {
 278         return rsnd_runtime_channel_for_ssi(io) >= 6;
 279 }
 280
 281 /*
 282  *      ADINR function
 283  */
 284 u32 rsnd_get_adinr_bit(struct rsnd_mod *mod, struct rsnd_dai_stream *io)
 285 {
 286         struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
 287         struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
 288         struct device *dev = rsnd_priv_to_dev(priv);
 289
 290         switch (runtime->sample_bits) {
 291         case 16:
 292                 return 8 << 16;
 293         case 32:
 294                 return 0 << 16;
 295         }
 296
 297         dev_warn(dev, "not supported sample bits\n");
 298
 299         return 0;
 300 }
 301
 302 /*
 303  *      DALIGN function
 304  */
 305 u32 rsnd_get_dalign(struct rsnd_mod *mod, struct rsnd_dai_stream *io)
 306 {
 307         struct rsnd_mod *ssiu = rsnd_io_to_mod_ssiu(io);
 308         struct rsnd_mod *target;
 309         struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
 310         u32 val = 0x76543210;
 311         u32 mask = ~0;
 312
 313         if (rsnd_io_is_play(io)) {
 314                 struct rsnd_mod *src = rsnd_io_to_mod_src(io);
 315
 316                 target = src ? src : ssiu;
 317         } else {
 318                 struct rsnd_mod *cmd = rsnd_io_to_mod_cmd(io);
 319
 320                 target = cmd ? cmd : ssiu;
 321         }
 322
 323         mask <<= runtime->channels * 4;
 324         val = val & mask;
 325
 326         switch (runtime->sample_bits) {
 327         case 16:
 328                 val |= 0x67452301 & ~mask;
 329                 break;
 330         case 32:
 331                 val |= 0x76543210 & ~mask;
 332                 break;
 333         }
 334
 335         /*
 336          * exchange channeles on SRC if possible,
 337          * otherwise, R/L volume settings on DVC
 338          * changes inverted channels
 339          */
 340         if (mod == target)
 341                 return val;
 342         else
 343                 return 0x76543210;
 344 }
 345
 346 u32 rsnd_get_busif_shift(struct rsnd_dai_stream *io, struct rsnd_mod *mod)
 347 {
 348         enum rsnd_mod_type playback_mods[] = {
 349                 RSND_MOD_SRC,
 350                 RSND_MOD_CMD,
 351                 RSND_MOD_SSIU,
 352         };
 353         enum rsnd_mod_type capture_mods[] = {
 354                 RSND_MOD_CMD,
 355                 RSND_MOD_SRC,
 356                 RSND_MOD_SSIU,
 357         };
 358         struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
 359         struct rsnd_mod *tmod = NULL;
 360         enum rsnd_mod_type *mods =
 361                 rsnd_io_is_play(io) ?
 362                 playback_mods : capture_mods;
 363         int i;
 364
 365         /*
 366          * This is needed for 24bit data
 367          * We need to shift 8bit
 368          *
 369          * Linux 24bit data is located as 0x00******
 370          * HW    24bit data is located as 0x******00
 371          *
 372          */
 373         switch (runtime->sample_bits) {
 374         case 16:
 375                 return 0;
 376         case 32:
 377                 break;
 378         }
 379
 380         for (i = 0; i < ARRAY_SIZE(playback_mods); i++) {
 381                 tmod = rsnd_io_to_mod(io, mods[i]);
 382                 if (tmod)
 383                         break;
 384         }
 385
 386         if (tmod != mod)
 387                 return 0;
 388
 389         if (rsnd_io_is_play(io))
 390                 return  (0 << 20) | /* shift to Left */
 391                         (8 << 16);  /* 8bit */
 392         else
 393                 return  (1 << 20) | /* shift to Right */
 394                         (8 << 16);  /* 8bit */
 395 }
 396
 397 /*
 398  *      rsnd_dai functions
 399  */
 400 struct rsnd_mod *rsnd_mod_next(int *iterator,
 401                                struct rsnd_dai_stream *io,
 402                                enum rsnd_mod_type *array,
 403                                int array_size)
 404 {
 405         struct rsnd_mod *mod;
 406         enum rsnd_mod_type type;
 407         int max = array ? array_size : RSND_MOD_MAX;
 408
 409         for (; *iterator < max; (*iterator)++) {
 410                 type = (array) ? array[*iterator] : *iterator;
 411                 mod = io->mod[type];
 412                 if (!mod)
 413                         continue;
 414
 415                 return mod;
 416         }
 417
 418         return NULL;
 419 }
 420
 421 static enum rsnd_mod_type rsnd_mod_sequence[][RSND_MOD_MAX] = {
 422         {
 423                 /* CAPTURE */
 424                 RSND_MOD_AUDMAPP,
 425                 RSND_MOD_AUDMA,
 426                 RSND_MOD_DVC,
 427                 RSND_MOD_MIX,
 428                 RSND_MOD_CTU,
 429                 RSND_MOD_CMD,
 430                 RSND_MOD_SRC,
 431                 RSND_MOD_SSIU,
 432                 RSND_MOD_SSIM3,
 433                 RSND_MOD_SSIM2,
 434                 RSND_MOD_SSIM1,
 435                 RSND_MOD_SSIP,
 436                 RSND_MOD_SSI,
 437         }, {
 438                 /* PLAYBACK */
 439                 RSND_MOD_AUDMAPP,
 440                 RSND_MOD_AUDMA,
 441                 RSND_MOD_SSIM3,
 442                 RSND_MOD_SSIM2,
 443                 RSND_MOD_SSIM1,
 444                 RSND_MOD_SSIP,
 445                 RSND_MOD_SSI,
 446                 RSND_MOD_SSIU,
 447                 RSND_MOD_DVC,
 448                 RSND_MOD_MIX,
 449                 RSND_MOD_CTU,
 450                 RSND_MOD_CMD,
 451                 RSND_MOD_SRC,
 452         },
 453 };
 454
 455 static int rsnd_status_update(u32 *status,
 456                               int shift, int add, int timing)
 457 {
 458         u32 mask        = 0xF << shift;
 459         u8 val          = (*status >> shift) & 0xF;
 460         u8 next_val     = (val + add) & 0xF;
 461         int func_call   = (val == timing);
 462
 463         if (next_val == 0xF) /* underflow case */
 464                 func_call = 0;
 465         else
 466                 *status = (*status & ~mask) + (next_val << shift);
 467
 468         return func_call;
 469 }
 470
 471 #define rsnd_dai_call(fn, io, param...)                                 \
 472 ({                                                                      \
 473         struct rsnd_priv *priv = rsnd_io_to_priv(io);                   \
 474         struct device *dev = rsnd_priv_to_dev(priv);                    \
 475         struct rsnd_mod *mod;                                           \
 476         int is_play = rsnd_io_is_play(io);                              \
 477         int ret = 0, i;                                                 \
 478         enum rsnd_mod_type *types = rsnd_mod_sequence[is_play];         \
 479         for_each_rsnd_mod_arrays(i, mod, io, types, RSND_MOD_MAX) {     \
 480                 int tmp = 0;                                            \
 481                 u32 *status = mod->get_status(io, mod, types[i]);       \
 482                 int func_call = rsnd_status_update(status,              \
 483                                                 __rsnd_mod_shift_##fn,  \
 484                                                 __rsnd_mod_add_##fn,    \
 485                                                 __rsnd_mod_call_##fn);  \
 486                 dev_dbg(dev, "%s[%d]\t0x%08x %s\n",                     \
 487                         rsnd_mod_name(mod), rsnd_mod_id(mod), *status,  \
 488                         (func_call && (mod)->ops->fn) ? #fn : "");      \
 489                 if (func_call && (mod)->ops->fn)                        \
 490                         tmp = (mod)->ops->fn(mod, io, param);           \
 491                 if (tmp)                                                \
 492                         dev_err(dev, "%s[%d] : %s error %d\n",          \
 493                                 rsnd_mod_name(mod), rsnd_mod_id(mod),   \
 494                                                      #fn, tmp);         \
 495                 ret |= tmp;                                             \
 496         }                                                               \
 497         ret;                                                            \
 498 })
 499
 500 int rsnd_dai_connect(struct rsnd_mod *mod,
 501                      struct rsnd_dai_stream *io,
 502                      enum rsnd_mod_type type)
 503 {
 504         struct rsnd_priv *priv;
 505         struct device *dev;
 506
 507         if (!mod)
 508                 return -EIO;
 509
 510         if (io->mod[type] == mod)
 511                 return 0;
 512
 513         if (io->mod[type])
 514                 return -EINVAL;
 515
 516         priv = rsnd_mod_to_priv(mod);
 517         dev = rsnd_priv_to_dev(priv);
 518
 519         io->mod[type] = mod;
 520
 521         dev_dbg(dev, "%s[%d] is connected to io (%s)\n",
 522                 rsnd_mod_name(mod), rsnd_mod_id(mod),
 523                 rsnd_io_is_play(io) ? "Playback" : "Capture");
 524
 525         return 0;
 526 }
 527
 528 static void rsnd_dai_disconnect(struct rsnd_mod *mod,
 529                                 struct rsnd_dai_stream *io,
 530                                 enum rsnd_mod_type type)
 531 {
 532         io->mod[type] = NULL;
 533 }
 534
 535 struct rsnd_dai *rsnd_rdai_get(struct rsnd_priv *priv, int id)
 536 {
 537         if ((id < 0) || (id >= rsnd_rdai_nr(priv)))
 538                 return NULL;
 539
 540         return priv->rdai + id;
 541 }
 542
 543 #define rsnd_dai_to_priv(dai) snd_soc_dai_get_drvdata(dai)
 544 static struct rsnd_dai *rsnd_dai_to_rdai(struct snd_soc_dai *dai)
 545 {
 546         struct rsnd_priv *priv = rsnd_dai_to_priv(dai);
 547
 548         return rsnd_rdai_get(priv, dai->id);
 549 }
 550
 551 /*
 552  *      rsnd_soc_dai functions
 553  */
 554 int rsnd_dai_pointer_offset(struct rsnd_dai_stream *io, int additional)
 555 {
 556         struct snd_pcm_substream *substream = io->substream;
 557         struct snd_pcm_runtime *runtime = substream->runtime;
 558         int pos = io->byte_pos + additional;
 559
 560         pos %= (runtime->periods * io->byte_per_period);
 561
 562         return pos;
 563 }
 564
 565 bool rsnd_dai_pointer_update(struct rsnd_dai_stream *io, int byte)
 566 {
 567         io->byte_pos += byte;
 568
 569         if (io->byte_pos >= io->next_period_byte) {
 570                 struct snd_pcm_substream *substream = io->substream;
 571                 struct snd_pcm_runtime *runtime = substream->runtime;
 572
 573                 io->period_pos++;
 574                 io->next_period_byte += io->byte_per_period;
 575
 576                 if (io->period_pos >= runtime->periods) {
 577                         io->byte_pos = 0;
 578                         io->period_pos = 0;
 579                         io->next_period_byte = io->byte_per_period;
 580                 }
 581
 582                 return true;
 583         }
 584
 585         return false;
 586 }
 587
 588 void rsnd_dai_period_elapsed(struct rsnd_dai_stream *io)
 589 {
 590         struct snd_pcm_substream *substream = io->substream;
 591
 592         /*
 593          * this function should be called...
 594          *
 595          * - if rsnd_dai_pointer_update() returns true
 596          * - without spin lock
 597          */
 598
 599         snd_pcm_period_elapsed(substream);
 600 }
 601
 602 static void rsnd_dai_stream_init(struct rsnd_dai_stream *io,
 603                                 struct snd_pcm_substream *substream)
 604 {
 605         struct snd_pcm_runtime *runtime = substream->runtime;
 606
 607         io->substream           = substream;
 608         io->byte_pos            = 0;
 609         io->period_pos          = 0;
 610         io->byte_per_period     = runtime->period_size *
 611                                   runtime->channels *
 612                                   samples_to_bytes(runtime, 1);
 613         io->next_period_byte    = io->byte_per_period;
 614 }
 615
 616 static void rsnd_dai_stream_quit(struct rsnd_dai_stream *io)
 617 {
 618         io->substream           = NULL;
 619 }
 620
 621 static
 622 struct snd_soc_dai *rsnd_substream_to_dai(struct snd_pcm_substream *substream)
 623 {
 624         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 625
 626         return  rtd->cpu_dai;
 627 }
 628
 629 static
 630 struct rsnd_dai_stream *rsnd_rdai_to_io(struct rsnd_dai *rdai,
 631                                         struct snd_pcm_substream *substream)
 632 {
 633         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 634                 return &rdai->playback;
 635         else
 636                 return &rdai->capture;
 637 }
 638
 639 static int rsnd_soc_dai_trigger(struct snd_pcm_substream *substream, int cmd,
 640                             struct snd_soc_dai *dai)
 641 {
 642         struct rsnd_priv *priv = rsnd_dai_to_priv(dai);
 643         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
 644         struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream);
 645         int ret;
 646         unsigned long flags;
 647
 648         spin_lock_irqsave(&priv->lock, flags);
 649
 650         switch (cmd) {
 651         case SNDRV_PCM_TRIGGER_START:
 652         case SNDRV_PCM_TRIGGER_RESUME:
 653                 rsnd_dai_stream_init(io, substream);
 654
 655                 ret = rsnd_dai_call(init, io, priv);
 656                 if (ret < 0)
 657                         goto dai_trigger_end;
 658
 659                 ret = rsnd_dai_call(start, io, priv);
 660                 if (ret < 0)
 661                         goto dai_trigger_end;
 662
 663                 ret = rsnd_dai_call(irq, io, priv, 1);
 664                 if (ret < 0)
 665                         goto dai_trigger_end;
 666
 667                 break;
 668         case SNDRV_PCM_TRIGGER_STOP:
 669         case SNDRV_PCM_TRIGGER_SUSPEND:
 670                 ret = rsnd_dai_call(irq, io, priv, 0);
 671
 672                 ret |= rsnd_dai_call(stop, io, priv);
 673
 674                 ret |= rsnd_dai_call(quit, io, priv);
 675
 676                 rsnd_dai_stream_quit(io);
 677                 break;
 678         default:
 679                 ret = -EINVAL;
 680         }
 681
 682 dai_trigger_end:
 683         spin_unlock_irqrestore(&priv->lock, flags);
 684
 685         return ret;
 686 }
 687
 688 static int rsnd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
 689 {
 690         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
 691
 692         /* set master/slave audio interface */
 693         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 694         case SND_SOC_DAIFMT_CBM_CFM:
 695                 rdai->clk_master = 0;
 696                 break;
 697         case SND_SOC_DAIFMT_CBS_CFS:
 698                 rdai->clk_master = 1; /* codec is slave, cpu is master */
 699                 break;
 700         default:
 701                 return -EINVAL;
 702         }
 703
 704         /* set format */
 705         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 706         case SND_SOC_DAIFMT_I2S:
 707                 rdai->sys_delay = 0;
 708                 rdai->data_alignment = 0;
 709                 rdai->frm_clk_inv = 0;
 710                 break;
 711         case SND_SOC_DAIFMT_LEFT_J:
 712                 rdai->sys_delay = 1;
 713                 rdai->data_alignment = 0;
 714                 rdai->frm_clk_inv = 1;
 715                 break;
 716         case SND_SOC_DAIFMT_RIGHT_J:
 717                 rdai->sys_delay = 1;
 718                 rdai->data_alignment = 1;
 719                 rdai->frm_clk_inv = 1;
 720                 break;
 721         }
 722
 723         /* set clock inversion */
 724         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
 725         case SND_SOC_DAIFMT_NB_IF:
 726                 rdai->frm_clk_inv = !rdai->frm_clk_inv;
 727                 break;
 728         case SND_SOC_DAIFMT_IB_NF:
 729                 rdai->bit_clk_inv = !rdai->bit_clk_inv;
 730                 break;
 731         case SND_SOC_DAIFMT_IB_IF:
 732                 rdai->bit_clk_inv = !rdai->bit_clk_inv;
 733                 rdai->frm_clk_inv = !rdai->frm_clk_inv;
 734                 break;
 735         case SND_SOC_DAIFMT_NB_NF:
 736         default:
 737                 break;
 738         }
 739
 740         return 0;
 741 }
 742
 743 static int rsnd_soc_set_dai_tdm_slot(struct snd_soc_dai *dai,
 744                                      u32 tx_mask, u32 rx_mask,
 745                                      int slots, int slot_width)
 746 {
 747         struct rsnd_priv *priv = rsnd_dai_to_priv(dai);
 748         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
 749         struct device *dev = rsnd_priv_to_dev(priv);
 750
 751         switch (slots) {
 752         case 6:
 753                 /* TDM Extend Mode */
 754                 rsnd_set_slot(rdai, slots, 1);
 755                 break;
 756         default:
 757                 dev_err(dev, "unsupported TDM slots (%d)\n", slots);
 758                 return -EINVAL;
 759         }
 760
 761         return 0;
 762 }
 763
 764 static int rsnd_soc_dai_startup(struct snd_pcm_substream *substream,
 765                                 struct snd_soc_dai *dai)
 766 {
 767         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
 768         struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream);
 769
 770         /*
 771          * call rsnd_dai_call without spinlock
 772          */
 773         return rsnd_dai_call(nolock_start, io, priv);
 774 }
 775
 776 static void rsnd_soc_dai_shutdown(struct snd_pcm_substream *substream,
 777                                   struct snd_soc_dai *dai)
 778 {
 779         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
 780         struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream);
 781
 782         /*
 783          * call rsnd_dai_call without spinlock
 784          */
 785         rsnd_dai_call(nolock_stop, io, priv);
 786 }
 787
 788 static const struct snd_soc_dai_ops rsnd_soc_dai_ops = {
 789         .startup        = rsnd_soc_dai_startup,
 790         .shutdown       = rsnd_soc_dai_shutdown,
 791         .trigger        = rsnd_soc_dai_trigger,
 792         .set_fmt        = rsnd_soc_dai_set_fmt,
 793         .set_tdm_slot   = rsnd_soc_set_dai_tdm_slot,
 794 };
 795
 796 void rsnd_parse_connect_common(struct rsnd_dai *rdai,
 797                 struct rsnd_mod* (*mod_get)(struct rsnd_priv *priv, int id),
 798                 struct device_node *node,
 799                 struct device_node *playback,
 800                 struct device_node *capture)
 801 {
 802         struct rsnd_priv *priv = rsnd_rdai_to_priv(rdai);
 803         struct device_node *np;
 804         struct rsnd_mod *mod;
 805         int i;
 806
 807         if (!node)
 808                 return;
 809
 810         i = 0;
 811         for_each_child_of_node(node, np) {
 812                 mod = mod_get(priv, i);
 813                 if (np == playback)
 814                         rsnd_dai_connect(mod, &rdai->playback, mod->type);
 815                 if (np == capture)
 816                         rsnd_dai_connect(mod, &rdai->capture, mod->type);
 817                 i++;
 818         }
 819
 820         of_node_put(node);
 821 }
 822
 823 static int rsnd_dai_probe(struct rsnd_priv *priv)
 824 {
 825         struct device_node *dai_node;
 826         struct device_node *dai_np;
 827         struct device_node *playback, *capture;
 828         struct rsnd_dai_stream *io_playback;
 829         struct rsnd_dai_stream *io_capture;
 830         struct snd_soc_dai_driver *rdrv, *drv;
 831         struct rsnd_dai *rdai;
 832         struct device *dev = rsnd_priv_to_dev(priv);
 833         int nr, dai_i, io_i;
 834         int ret;
 835
 836         dai_node = rsnd_dai_of_node(priv);
 837         nr = of_get_child_count(dai_node);
 838         if (!nr) {
 839                 ret = -EINVAL;
 840                 goto rsnd_dai_probe_done;
 841         }
 842
 843         rdrv = devm_kzalloc(dev, sizeof(*rdrv) * nr, GFP_KERNEL);
 844         rdai = devm_kzalloc(dev, sizeof(*rdai) * nr, GFP_KERNEL);
 845         if (!rdrv || !rdai) {
 846                 ret = -ENOMEM;
 847                 goto rsnd_dai_probe_done;
 848         }
 849
 850         priv->rdai_nr   = nr;
 851         priv->daidrv    = rdrv;
 852         priv->rdai      = rdai;
 853
 854         /*
 855          * parse all dai
 856          */
 857         dai_i = 0;
 858         for_each_child_of_node(dai_node, dai_np) {
 859                 rdai            = rsnd_rdai_get(priv, dai_i);
 860                 drv             = rdrv + dai_i;
 861                 io_playback     = &rdai->playback;
 862                 io_capture      = &rdai->capture;
 863
 864                 snprintf(rdai->name, RSND_DAI_NAME_SIZE, "rsnd-dai.%d", dai_i);
 865
 866                 rdai->priv      = priv;
 867                 drv->name       = rdai->name;
 868                 drv->ops        = &rsnd_soc_dai_ops;
 869
 870                 snprintf(rdai->playback.name, RSND_DAI_NAME_SIZE,
 871                          "DAI%d Playback", dai_i);
 872                 drv->playback.rates             = RSND_RATES;
 873                 drv->playback.formats           = RSND_FMTS;
 874                 drv->playback.channels_min      = 2;
 875                 drv->playback.channels_max      = 6;
 876                 drv->playback.stream_name       = rdai->playback.name;
 877
 878                 snprintf(rdai->capture.name, RSND_DAI_NAME_SIZE,
 879                          "DAI%d Capture", dai_i);
 880                 drv->capture.rates              = RSND_RATES;
 881                 drv->capture.formats            = RSND_FMTS;
 882                 drv->capture.channels_min       = 2;
 883                 drv->capture.channels_max       = 6;
 884                 drv->capture.stream_name        = rdai->capture.name;
 885
 886                 rdai->playback.rdai             = rdai;
 887                 rdai->capture.rdai              = rdai;
 888                 rsnd_set_slot(rdai, 2, 1); /* default */
 889
 890                 for (io_i = 0;; io_i++) {
 891                         playback = of_parse_phandle(dai_np, "playback", io_i);
 892                         capture  = of_parse_phandle(dai_np, "capture", io_i);
 893
 894                         if (!playback && !capture)
 895                                 break;
 896
 897                         rsnd_parse_connect_ssi(rdai, playback, capture);
 898                         rsnd_parse_connect_src(rdai, playback, capture);
 899                         rsnd_parse_connect_ctu(rdai, playback, capture);
 900                         rsnd_parse_connect_mix(rdai, playback, capture);
 901                         rsnd_parse_connect_dvc(rdai, playback, capture);
 902
 903                         of_node_put(playback);
 904                         of_node_put(capture);
 905                 }
 906
 907                 dai_i++;
 908
 909                 dev_dbg(dev, "%s (%s/%s)\n", rdai->name,
 910                         rsnd_io_to_mod_ssi(io_playback) ? "play"    : " -- ",
 911                         rsnd_io_to_mod_ssi(io_capture) ? "capture" : "  --   ");
 912         }
 913
 914         ret = 0;
 915
 916 rsnd_dai_probe_done:
 917         of_node_put(dai_node);
 918
 919         return ret;
 920 }
 921
 922 /*
 923  *              pcm ops
 924  */
 925 static struct snd_pcm_hardware rsnd_pcm_hardware = {
 926         .info =         SNDRV_PCM_INFO_INTERLEAVED      |
 927                         SNDRV_PCM_INFO_MMAP             |
 928                         SNDRV_PCM_INFO_MMAP_VALID,
 929         .buffer_bytes_max       = 64 * 1024,
 930         .period_bytes_min       = 32,
 931         .period_bytes_max       = 8192,
 932         .periods_min            = 1,
 933         .periods_max            = 32,
 934         .fifo_size              = 256,
 935 };
 936
 937 static int rsnd_pcm_open(struct snd_pcm_substream *substream)
 938 {
 939         struct snd_pcm_runtime *runtime = substream->runtime;
 940         int ret = 0;
 941
 942         snd_soc_set_runtime_hwparams(substream, &rsnd_pcm_hardware);
 943
 944         ret = snd_pcm_hw_constraint_integer(runtime,
 945                                             SNDRV_PCM_HW_PARAM_PERIODS);
 946
 947         return ret;
 948 }
 949
 950 static int rsnd_hw_params(struct snd_pcm_substream *substream,
 951                          struct snd_pcm_hw_params *hw_params)
 952 {
 953         struct snd_soc_dai *dai = rsnd_substream_to_dai(substream);
 954         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
 955         struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream);
 956         int ret;
 957
 958         ret = rsnd_dai_call(hw_params, io, substream, hw_params);
 959         if (ret)
 960                 return ret;
 961
 962         return snd_pcm_lib_malloc_pages(substream,
 963                                         params_buffer_bytes(hw_params));
 964 }
 965
 966 static snd_pcm_uframes_t rsnd_pointer(struct snd_pcm_substream *substream)
 967 {
 968         struct snd_pcm_runtime *runtime = substream->runtime;
 969         struct snd_soc_dai *dai = rsnd_substream_to_dai(substream);
 970         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
 971         struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream);
 972
 973         return bytes_to_frames(runtime, io->byte_pos);
 974 }
 975
 976 static struct snd_pcm_ops rsnd_pcm_ops = {
 977         .open           = rsnd_pcm_open,
 978         .ioctl          = snd_pcm_lib_ioctl,
 979         .hw_params      = rsnd_hw_params,
 980         .hw_free        = snd_pcm_lib_free_pages,
 981         .pointer        = rsnd_pointer,
 982 };
 983
 984 /*
 985  *              snd_kcontrol
 986  */
 987 #define kcontrol_to_cfg(kctrl) ((struct rsnd_kctrl_cfg *)kctrl->private_value)
 988 static int rsnd_kctrl_info(struct snd_kcontrol *kctrl,
 989                            struct snd_ctl_elem_info *uinfo)
 990 {
 991         struct rsnd_kctrl_cfg *cfg = kcontrol_to_cfg(kctrl);
 992
 993         if (cfg->texts) {
 994                 uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
 995                 uinfo->count = cfg->size;
 996                 uinfo->value.enumerated.items = cfg->max;
 997                 if (uinfo->value.enumerated.item >= cfg->max)
 998                         uinfo->value.enumerated.item = cfg->max - 1;
 999                 strlcpy(uinfo->value.enumerated.name,
1000                         cfg->texts[uinfo->value.enumerated.item],
1001                         sizeof(uinfo->value.enumerated.name));
1002         } else {
1003                 uinfo->count = cfg->size;
1004                 uinfo->value.integer.min = 0;
1005                 uinfo->value.integer.max = cfg->max;
1006                 uinfo->type = (cfg->max == 1) ?
1007                         SNDRV_CTL_ELEM_TYPE_BOOLEAN :
1008                         SNDRV_CTL_ELEM_TYPE_INTEGER;
1009         }
1010
1011         return 0;
1012 }
1013
1014 static int rsnd_kctrl_get(struct snd_kcontrol *kctrl,
1015                           struct snd_ctl_elem_value *uc)
1016 {
1017         struct rsnd_kctrl_cfg *cfg = kcontrol_to_cfg(kctrl);
1018         int i;
1019
1020         for (i = 0; i < cfg->size; i++)
1021                 if (cfg->texts)
1022                         uc->value.enumerated.item[i] = cfg->val[i];
1023                 else
1024                         uc->value.integer.value[i] = cfg->val[i];
1025
1026         return 0;
1027 }
1028
1029 static int rsnd_kctrl_put(struct snd_kcontrol *kctrl,
1030                           struct snd_ctl_elem_value *uc)
1031 {
1032         struct rsnd_mod *mod = snd_kcontrol_chip(kctrl);
1033         struct rsnd_kctrl_cfg *cfg = kcontrol_to_cfg(kctrl);
1034         int i, change = 0;
1035
1036         for (i = 0; i < cfg->size; i++) {
1037                 if (cfg->texts) {
1038                         change |= (uc->value.enumerated.item[i] != cfg->val[i]);
1039                         cfg->val[i] = uc->value.enumerated.item[i];
1040                 } else {
1041                         change |= (uc->value.integer.value[i] != cfg->val[i]);
1042                         cfg->val[i] = uc->value.integer.value[i];
1043                 }
1044         }
1045
1046         if (change && cfg->update)
1047                 cfg->update(cfg->io, mod);
1048
1049         return change;
1050 }
1051
1052 struct rsnd_kctrl_cfg *rsnd_kctrl_init_m(struct rsnd_kctrl_cfg_m *cfg)
1053 {
1054         cfg->cfg.val = cfg->val;
1055
1056         return &cfg->cfg;
1057 }
1058
1059 struct rsnd_kctrl_cfg *rsnd_kctrl_init_s(struct rsnd_kctrl_cfg_s *cfg)
1060 {
1061         cfg->cfg.val = &cfg->val;
1062
1063         return &cfg->cfg;
1064 }
1065
1066 int rsnd_kctrl_new(struct rsnd_mod *mod,
1067                    struct rsnd_dai_stream *io,
1068                    struct snd_soc_pcm_runtime *rtd,
1069                    const unsigned char *name,
1070                    void (*update)(struct rsnd_dai_stream *io,
1071                                   struct rsnd_mod *mod),
1072                    struct rsnd_kctrl_cfg *cfg,
1073                    const char * const *texts,
1074                    int size,
1075                    u32 max)
1076 {
1077         struct snd_card *card = rtd->card->snd_card;
1078         struct snd_kcontrol *kctrl;
1079         struct snd_kcontrol_new knew = {
1080                 .iface          = SNDRV_CTL_ELEM_IFACE_MIXER,
1081                 .name           = name,
1082                 .info           = rsnd_kctrl_info,
1083                 .index          = rtd->num,
1084                 .get            = rsnd_kctrl_get,
1085                 .put            = rsnd_kctrl_put,
1086                 .private_value  = (unsigned long)cfg,
1087         };
1088         int ret;
1089
1090         if (size > RSND_MAX_CHANNELS)
1091                 return -EINVAL;
1092
1093         kctrl = snd_ctl_new1(&knew, mod);
1094         if (!kctrl)
1095                 return -ENOMEM;
1096
1097         ret = snd_ctl_add(card, kctrl);
1098         if (ret < 0)
1099                 return ret;
1100
1101         cfg->texts      = texts;
1102         cfg->max        = max;
1103         cfg->size       = size;
1104         cfg->update     = update;
1105         cfg->card       = card;
1106         cfg->kctrl      = kctrl;
1107         cfg->io         = io;
1108
1109         return 0;
1110 }
1111
1112 /*
1113  *              snd_soc_platform
1114  */
1115
1116 #define PREALLOC_BUFFER         (32 * 1024)
1117 #define PREALLOC_BUFFER_MAX     (32 * 1024)
1118
1119 static int rsnd_pcm_new(struct snd_soc_pcm_runtime *rtd)
1120 {
1121         struct snd_soc_dai *dai = rtd->cpu_dai;
1122         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
1123         int ret;
1124
1125         ret = rsnd_dai_call(pcm_new, &rdai->playback, rtd);
1126         if (ret)
1127                 return ret;
1128
1129         ret = rsnd_dai_call(pcm_new, &rdai->capture, rtd);
1130         if (ret)
1131                 return ret;
1132
1133         return snd_pcm_lib_preallocate_pages_for_all(
1134                 rtd->pcm,
1135                 SNDRV_DMA_TYPE_CONTINUOUS,
1136                 snd_dma_continuous_data(GFP_KERNEL),
1137                 PREALLOC_BUFFER, PREALLOC_BUFFER_MAX);
1138 }
1139
1140 static struct snd_soc_platform_driver rsnd_soc_platform = {
1141         .ops            = &rsnd_pcm_ops,
1142         .pcm_new        = rsnd_pcm_new,
1143 };
1144
1145 static const struct snd_soc_component_driver rsnd_soc_component = {
1146         .name           = "rsnd",
1147 };
1148
1149 static int rsnd_rdai_continuance_probe(struct rsnd_priv *priv,
1150                                        struct rsnd_dai_stream *io)
1151 {
1152         int ret;
1153
1154         ret = rsnd_dai_call(probe, io, priv);
1155         if (ret == -EAGAIN) {
1156                 struct rsnd_mod *ssi_mod = rsnd_io_to_mod_ssi(io);
1157                 struct rsnd_mod *mod;
1158                 int i;
1159
1160                 /*
1161                  * Fallback to PIO mode
1162                  */
1163
1164                 /*
1165                  * call "remove" for SSI/SRC/DVC
1166                  * SSI will be switch to PIO mode if it was DMA mode
1167                  * see
1168                  *      rsnd_dma_init()
1169                  *      rsnd_ssi_fallback()
1170                  */
1171                 rsnd_dai_call(remove, io, priv);
1172
1173                 /*
1174                  * remove all mod from io
1175                  * and, re connect ssi
1176                  */
1177                 for_each_rsnd_mod(i, mod, io)
1178                         rsnd_dai_disconnect(mod, io, i);
1179                 rsnd_dai_connect(ssi_mod, io, RSND_MOD_SSI);
1180
1181                 /*
1182                  * fallback
1183                  */
1184                 rsnd_dai_call(fallback, io, priv);
1185
1186                 /*
1187                  * retry to "probe".
1188                  * DAI has SSI which is PIO mode only now.
1189                  */
1190                 ret = rsnd_dai_call(probe, io, priv);
1191         }
1192
1193         return ret;
1194 }
1195
1196 /*
1197  *      rsnd probe
1198  */
1199 static int rsnd_probe(struct platform_device *pdev)
1200 {
1201         struct rsnd_priv *priv;
1202         struct device *dev = &pdev->dev;
1203         struct rsnd_dai *rdai;
1204         int (*probe_func[])(struct rsnd_priv *priv) = {
1205                 rsnd_gen_probe,
1206                 rsnd_dma_probe,
1207                 rsnd_ssi_probe,
1208                 rsnd_ssiu_probe,
1209                 rsnd_src_probe,
1210                 rsnd_ctu_probe,
1211                 rsnd_mix_probe,
1212                 rsnd_dvc_probe,
1213                 rsnd_cmd_probe,
1214                 rsnd_adg_probe,
1215                 rsnd_dai_probe,
1216         };
1217         int ret, i;
1218
1219         /*
1220          *      init priv data
1221          */
1222         priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
1223         if (!priv) {
1224                 dev_err(dev, "priv allocate failed\n");
1225                 return -ENODEV;
1226         }
1227
1228         priv->pdev      = pdev;
1229         priv->flags     = (unsigned long)of_device_get_match_data(dev);
1230         spin_lock_init(&priv->lock);
1231
1232         /*
1233          *      init each module
1234          */
1235         for (i = 0; i < ARRAY_SIZE(probe_func); i++) {
1236                 ret = probe_func[i](priv);
1237                 if (ret)
1238                         return ret;
1239         }
1240
1241         for_each_rsnd_dai(rdai, priv, i) {
1242                 ret = rsnd_rdai_continuance_probe(priv, &rdai->playback);
1243                 if (ret)
1244                         goto exit_snd_probe;
1245
1246                 ret = rsnd_rdai_continuance_probe(priv, &rdai->capture);
1247                 if (ret)
1248                         goto exit_snd_probe;
1249         }
1250
1251         dev_set_drvdata(dev, priv);
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         pm_runtime_enable(dev);
1270
1271         dev_info(dev, "probed\n");
1272         return ret;
1273
1274 exit_snd_soc:
1275         snd_soc_unregister_platform(dev);
1276 exit_snd_probe:
1277         for_each_rsnd_dai(rdai, priv, i) {
1278                 rsnd_dai_call(remove, &rdai->playback, priv);
1279                 rsnd_dai_call(remove, &rdai->capture, priv);
1280         }
1281
1282         return ret;
1283 }
1284
1285 static int rsnd_remove(struct platform_device *pdev)
1286 {
1287         struct rsnd_priv *priv = dev_get_drvdata(&pdev->dev);
1288         struct rsnd_dai *rdai;
1289         void (*remove_func[])(struct rsnd_priv *priv) = {
1290                 rsnd_ssi_remove,
1291                 rsnd_ssiu_remove,
1292                 rsnd_src_remove,
1293                 rsnd_ctu_remove,
1294                 rsnd_mix_remove,
1295                 rsnd_dvc_remove,
1296                 rsnd_cmd_remove,
1297                 rsnd_adg_remove,
1298         };
1299         int ret = 0, i;
1300
1301         pm_runtime_disable(&pdev->dev);
1302
1303         for_each_rsnd_dai(rdai, priv, i) {
1304                 ret |= rsnd_dai_call(remove, &rdai->playback, priv);
1305                 ret |= rsnd_dai_call(remove, &rdai->capture, priv);
1306         }
1307
1308         for (i = 0; i < ARRAY_SIZE(remove_func); i++)
1309                 remove_func[i](priv);
1310
1311         snd_soc_unregister_component(&pdev->dev);
1312         snd_soc_unregister_platform(&pdev->dev);
1313
1314         return ret;
1315 }
1316
1317 static int rsnd_suspend(struct device *dev)
1318 {
1319         struct rsnd_priv *priv = dev_get_drvdata(dev);
1320
1321         rsnd_adg_clk_disable(priv);
1322
1323         return 0;
1324 }
1325
1326 static int rsnd_resume(struct device *dev)
1327 {
1328         struct rsnd_priv *priv = dev_get_drvdata(dev);
1329
1330         rsnd_adg_clk_enable(priv);
1331
1332         return 0;
1333 }
1334
1335 static struct dev_pm_ops rsnd_pm_ops = {
1336         .suspend                = rsnd_suspend,
1337         .resume                 = rsnd_resume,
1338 };
1339
1340 static struct platform_driver rsnd_driver = {
1341         .driver = {
1342                 .name   = "rcar_sound",
1343                 .pm     = &rsnd_pm_ops,
1344                 .of_match_table = rsnd_of_match,
1345         },
1346         .probe          = rsnd_probe,
1347         .remove         = rsnd_remove,
1348 };
1349 module_platform_driver(rsnd_driver);
1350
1351 MODULE_LICENSE("GPL");
1352 MODULE_DESCRIPTION("Renesas R-Car audio driver");
1353 MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");
1354 MODULE_ALIAS("platform:rcar-pcm-audio");