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 scu
  77  *   |
  78  *   +- scu
  79  *      |
  80  *      +- scu[0]
  81  *      +- scu[1]
  82  *      +- scu[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_96000
 100 #define RSND_FMTS (SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S16_LE)
 101
 102 /*
 103  *      rsnd_platform functions
 104  */
 105 #define rsnd_platform_call(priv, dai, func, param...)   \
 106         (!(priv->info->func) ? 0 :              \
 107          priv->info->func(param))
 108
 109 /*
 110  *      rsnd_mod functions
 111  */
 112 char *rsnd_mod_name(struct rsnd_mod *mod)
 113 {
 114         if (!mod || !mod->ops)
 115                 return "unknown";
 116
 117         return mod->ops->name;
 118 }
 119
 120 void rsnd_mod_init(struct rsnd_priv *priv,
 121                    struct rsnd_mod *mod,
 122                    struct rsnd_mod_ops *ops,
 123                    int id)
 124 {
 125         mod->priv       = priv;
 126         mod->id         = id;
 127         mod->ops        = ops;
 128         INIT_LIST_HEAD(&mod->list);
 129 }
 130
 131 /*
 132  *      rsnd_dma functions
 133  */
 134 static void rsnd_dma_continue(struct rsnd_dma *dma)
 135 {
 136         /* push next A or B plane */
 137         dma->submit_loop = 1;
 138         schedule_work(&dma->work);
 139 }
 140
 141 void rsnd_dma_start(struct rsnd_dma *dma)
 142 {
 143         /* push both A and B plane*/
 144         dma->submit_loop = 2;
 145         schedule_work(&dma->work);
 146 }
 147
 148 void rsnd_dma_stop(struct rsnd_dma *dma)
 149 {
 150         dma->submit_loop = 0;
 151         cancel_work_sync(&dma->work);
 152         dmaengine_terminate_all(dma->chan);
 153 }
 154
 155 static void rsnd_dma_complete(void *data)
 156 {
 157         struct rsnd_dma *dma = (struct rsnd_dma *)data;
 158         struct rsnd_priv *priv = dma->priv;
 159         unsigned long flags;
 160
 161         rsnd_lock(priv, flags);
 162
 163         dma->complete(dma);
 164
 165         if (dma->submit_loop)
 166                 rsnd_dma_continue(dma);
 167
 168         rsnd_unlock(priv, flags);
 169 }
 170
 171 static void rsnd_dma_do_work(struct work_struct *work)
 172 {
 173         struct rsnd_dma *dma = container_of(work, struct rsnd_dma, work);
 174         struct rsnd_priv *priv = dma->priv;
 175         struct device *dev = rsnd_priv_to_dev(priv);
 176         struct dma_async_tx_descriptor *desc;
 177         dma_addr_t buf;
 178         size_t len;
 179         int i;
 180
 181         for (i = 0; i < dma->submit_loop; i++) {
 182
 183                 if (dma->inquiry(dma, &buf, &len) < 0)
 184                         return;
 185
 186                 desc = dmaengine_prep_slave_single(
 187                         dma->chan, buf, len, dma->dir,
 188                         DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
 189                 if (!desc) {
 190                         dev_err(dev, "dmaengine_prep_slave_sg() fail\n");
 191                         return;
 192                 }
 193
 194                 desc->callback          = rsnd_dma_complete;
 195                 desc->callback_param    = dma;
 196
 197                 if (dmaengine_submit(desc) < 0) {
 198                         dev_err(dev, "dmaengine_submit() fail\n");
 199                         return;
 200                 }
 201
 202                 dma_async_issue_pending(dma->chan);
 203         }
 204 }
 205
 206 int rsnd_dma_available(struct rsnd_dma *dma)
 207 {
 208         return !!dma->chan;
 209 }
 210
 211 static bool rsnd_dma_filter(struct dma_chan *chan, void *param)
 212 {
 213         chan->private = param;
 214
 215         return true;
 216 }
 217
 218 int rsnd_dma_init(struct rsnd_priv *priv, struct rsnd_dma *dma,
 219                   int is_play, int id,
 220                   int (*inquiry)(struct rsnd_dma *dma,
 221                                   dma_addr_t *buf, int *len),
 222                   int (*complete)(struct rsnd_dma *dma))
 223 {
 224         struct device *dev = rsnd_priv_to_dev(priv);
 225         dma_cap_mask_t mask;
 226
 227         if (dma->chan) {
 228                 dev_err(dev, "it already has dma channel\n");
 229                 return -EIO;
 230         }
 231
 232         dma_cap_zero(mask);
 233         dma_cap_set(DMA_SLAVE, mask);
 234
 235         dma->slave.shdma_slave.slave_id = id;
 236
 237         dma->chan = dma_request_channel(mask, rsnd_dma_filter,
 238                                         &dma->slave.shdma_slave);
 239         if (!dma->chan) {
 240                 dev_err(dev, "can't get dma channel\n");
 241                 return -EIO;
 242         }
 243
 244         dma->dir = is_play ? DMA_TO_DEVICE : DMA_FROM_DEVICE;
 245         dma->priv = priv;
 246         dma->inquiry = inquiry;
 247         dma->complete = complete;
 248         INIT_WORK(&dma->work, rsnd_dma_do_work);
 249
 250         return 0;
 251 }
 252
 253 void  rsnd_dma_quit(struct rsnd_priv *priv,
 254                     struct rsnd_dma *dma)
 255 {
 256         if (dma->chan)
 257                 dma_release_channel(dma->chan);
 258
 259         dma->chan = NULL;
 260 }
 261
 262 /*
 263  *      rsnd_dai functions
 264  */
 265 #define rsnd_dai_call(rdai, io, fn)                     \
 266 ({                                                      \
 267         struct rsnd_mod *mod, *n;                       \
 268         int ret = 0;                                    \
 269         for_each_rsnd_mod(mod, n, io) {                 \
 270                 ret = rsnd_mod_call(mod, fn, rdai, io); \
 271                 if (ret < 0)                            \
 272                         break;                          \
 273         }                                               \
 274         ret;                                            \
 275 })
 276
 277 int rsnd_dai_connect(struct rsnd_dai *rdai,
 278                      struct rsnd_mod *mod,
 279                      struct rsnd_dai_stream *io)
 280 {
 281         if (!mod)
 282                 return -EIO;
 283
 284         if (!list_empty(&mod->list)) {
 285                 struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
 286                 struct device *dev = rsnd_priv_to_dev(priv);
 287
 288                 dev_err(dev, "%s%d is not empty\n",
 289                         rsnd_mod_name(mod),
 290                         rsnd_mod_id(mod));
 291                 return -EIO;
 292         }
 293
 294         list_add_tail(&mod->list, &io->head);
 295
 296         return 0;
 297 }
 298
 299 int rsnd_dai_disconnect(struct rsnd_mod *mod)
 300 {
 301         list_del_init(&mod->list);
 302
 303         return 0;
 304 }
 305
 306 int rsnd_dai_id(struct rsnd_priv *priv, struct rsnd_dai *rdai)
 307 {
 308         int id = rdai - priv->rdai;
 309
 310         if ((id < 0) || (id >= rsnd_dai_nr(priv)))
 311                 return -EINVAL;
 312
 313         return id;
 314 }
 315
 316 struct rsnd_dai *rsnd_dai_get(struct rsnd_priv *priv, int id)
 317 {
 318         if ((id < 0) || (id >= rsnd_dai_nr(priv)))
 319                 return NULL;
 320
 321         return priv->rdai + id;
 322 }
 323
 324 static struct rsnd_dai *rsnd_dai_to_rdai(struct snd_soc_dai *dai)
 325 {
 326         struct rsnd_priv *priv = snd_soc_dai_get_drvdata(dai);
 327
 328         return rsnd_dai_get(priv, dai->id);
 329 }
 330
 331 int rsnd_dai_is_play(struct rsnd_dai *rdai, struct rsnd_dai_stream *io)
 332 {
 333         return &rdai->playback == io;
 334 }
 335
 336 /*
 337  *      rsnd_soc_dai functions
 338  */
 339 int rsnd_dai_pointer_offset(struct rsnd_dai_stream *io, int additional)
 340 {
 341         struct snd_pcm_substream *substream = io->substream;
 342         struct snd_pcm_runtime *runtime = substream->runtime;
 343         int pos = io->byte_pos + additional;
 344
 345         pos %= (runtime->periods * io->byte_per_period);
 346
 347         return pos;
 348 }
 349
 350 void rsnd_dai_pointer_update(struct rsnd_dai_stream *io, int byte)
 351 {
 352         io->byte_pos += byte;
 353
 354         if (io->byte_pos >= io->next_period_byte) {
 355                 struct snd_pcm_substream *substream = io->substream;
 356                 struct snd_pcm_runtime *runtime = substream->runtime;
 357
 358                 io->period_pos++;
 359                 io->next_period_byte += io->byte_per_period;
 360
 361                 if (io->period_pos >= runtime->periods) {
 362                         io->byte_pos = 0;
 363                         io->period_pos = 0;
 364                         io->next_period_byte = io->byte_per_period;
 365                 }
 366
 367                 snd_pcm_period_elapsed(substream);
 368         }
 369 }
 370
 371 static int rsnd_dai_stream_init(struct rsnd_dai_stream *io,
 372                                 struct snd_pcm_substream *substream)
 373 {
 374         struct snd_pcm_runtime *runtime = substream->runtime;
 375
 376         if (!list_empty(&io->head))
 377                 return -EIO;
 378
 379         INIT_LIST_HEAD(&io->head);
 380         io->substream           = substream;
 381         io->byte_pos            = 0;
 382         io->period_pos          = 0;
 383         io->byte_per_period     = runtime->period_size *
 384                                   runtime->channels *
 385                                   samples_to_bytes(runtime, 1);
 386         io->next_period_byte    = io->byte_per_period;
 387
 388         return 0;
 389 }
 390
 391 static
 392 struct snd_soc_dai *rsnd_substream_to_dai(struct snd_pcm_substream *substream)
 393 {
 394         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 395
 396         return  rtd->cpu_dai;
 397 }
 398
 399 static
 400 struct rsnd_dai_stream *rsnd_rdai_to_io(struct rsnd_dai *rdai,
 401                                         struct snd_pcm_substream *substream)
 402 {
 403         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 404                 return &rdai->playback;
 405         else
 406                 return &rdai->capture;
 407 }
 408
 409 static int rsnd_soc_dai_trigger(struct snd_pcm_substream *substream, int cmd,
 410                             struct snd_soc_dai *dai)
 411 {
 412         struct rsnd_priv *priv = snd_soc_dai_get_drvdata(dai);
 413         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
 414         struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream);
 415         struct rsnd_mod *mod = rsnd_ssi_mod_get_frm_dai(priv,
 416                                                 rsnd_dai_id(priv, rdai),
 417                                                 rsnd_dai_is_play(rdai, io));
 418         int ssi_id = rsnd_mod_id(mod);
 419         int ret;
 420         unsigned long flags;
 421
 422         rsnd_lock(priv, flags);
 423
 424         switch (cmd) {
 425         case SNDRV_PCM_TRIGGER_START:
 426                 ret = rsnd_dai_stream_init(io, substream);
 427                 if (ret < 0)
 428                         goto dai_trigger_end;
 429
 430                 ret = rsnd_platform_call(priv, dai, start, ssi_id);
 431                 if (ret < 0)
 432                         goto dai_trigger_end;
 433
 434                 ret = rsnd_gen_path_init(priv, rdai, io);
 435                 if (ret < 0)
 436                         goto dai_trigger_end;
 437
 438                 ret = rsnd_dai_call(rdai, io, init);
 439                 if (ret < 0)
 440                         goto dai_trigger_end;
 441
 442                 ret = rsnd_dai_call(rdai, io, start);
 443                 if (ret < 0)
 444                         goto dai_trigger_end;
 445                 break;
 446         case SNDRV_PCM_TRIGGER_STOP:
 447                 ret = rsnd_dai_call(rdai, io, stop);
 448                 if (ret < 0)
 449                         goto dai_trigger_end;
 450
 451                 ret = rsnd_dai_call(rdai, io, quit);
 452                 if (ret < 0)
 453                         goto dai_trigger_end;
 454
 455                 ret = rsnd_gen_path_exit(priv, rdai, io);
 456                 if (ret < 0)
 457                         goto dai_trigger_end;
 458
 459                 ret = rsnd_platform_call(priv, dai, stop, ssi_id);
 460                 if (ret < 0)
 461                         goto dai_trigger_end;
 462                 break;
 463         default:
 464                 ret = -EINVAL;
 465         }
 466
 467 dai_trigger_end:
 468         rsnd_unlock(priv, flags);
 469
 470         return ret;
 471 }
 472
 473 static int rsnd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
 474 {
 475         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
 476
 477         /* set master/slave audio interface */
 478         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 479         case SND_SOC_DAIFMT_CBM_CFM:
 480                 rdai->clk_master = 1;
 481                 break;
 482         case SND_SOC_DAIFMT_CBS_CFS:
 483                 rdai->clk_master = 0;
 484                 break;
 485         default:
 486                 return -EINVAL;
 487         }
 488
 489         /* set clock inversion */
 490         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
 491         case SND_SOC_DAIFMT_NB_IF:
 492                 rdai->bit_clk_inv = 0;
 493                 rdai->frm_clk_inv = 1;
 494                 break;
 495         case SND_SOC_DAIFMT_IB_NF:
 496                 rdai->bit_clk_inv = 1;
 497                 rdai->frm_clk_inv = 0;
 498                 break;
 499         case SND_SOC_DAIFMT_IB_IF:
 500                 rdai->bit_clk_inv = 1;
 501                 rdai->frm_clk_inv = 1;
 502                 break;
 503         case SND_SOC_DAIFMT_NB_NF:
 504         default:
 505                 rdai->bit_clk_inv = 0;
 506                 rdai->frm_clk_inv = 0;
 507                 break;
 508         }
 509
 510         /* set format */
 511         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 512         case SND_SOC_DAIFMT_I2S:
 513                 rdai->sys_delay = 0;
 514                 rdai->data_alignment = 0;
 515                 break;
 516         case SND_SOC_DAIFMT_LEFT_J:
 517                 rdai->sys_delay = 1;
 518                 rdai->data_alignment = 0;
 519                 break;
 520         case SND_SOC_DAIFMT_RIGHT_J:
 521                 rdai->sys_delay = 1;
 522                 rdai->data_alignment = 1;
 523                 break;
 524         }
 525
 526         return 0;
 527 }
 528
 529 static const struct snd_soc_dai_ops rsnd_soc_dai_ops = {
 530         .trigger        = rsnd_soc_dai_trigger,
 531         .set_fmt        = rsnd_soc_dai_set_fmt,
 532 };
 533
 534 static int rsnd_dai_probe(struct platform_device *pdev,
 535                           struct rcar_snd_info *info,
 536                           struct rsnd_priv *priv)
 537 {
 538         struct snd_soc_dai_driver *drv;
 539         struct rsnd_dai *rdai;
 540         struct rsnd_mod *pmod, *cmod;
 541         struct device *dev = rsnd_priv_to_dev(priv);
 542         int dai_nr;
 543         int i;
 544
 545         /* get max dai nr */
 546         for (dai_nr = 0; dai_nr < 32; dai_nr++) {
 547                 pmod = rsnd_ssi_mod_get_frm_dai(priv, dai_nr, 1);
 548                 cmod = rsnd_ssi_mod_get_frm_dai(priv, dai_nr, 0);
 549
 550                 if (!pmod && !cmod)
 551                         break;
 552         }
 553
 554         if (!dai_nr) {
 555                 dev_err(dev, "no dai\n");
 556                 return -EIO;
 557         }
 558
 559         drv  = devm_kzalloc(dev, sizeof(*drv)  * dai_nr, GFP_KERNEL);
 560         rdai = devm_kzalloc(dev, sizeof(*rdai) * dai_nr, GFP_KERNEL);
 561         if (!drv || !rdai) {
 562                 dev_err(dev, "dai allocate failed\n");
 563                 return -ENOMEM;
 564         }
 565
 566         for (i = 0; i < dai_nr; i++) {
 567
 568                 pmod = rsnd_ssi_mod_get_frm_dai(priv, i, 1);
 569                 cmod = rsnd_ssi_mod_get_frm_dai(priv, i, 0);
 570
 571                 /*
 572                  *      init rsnd_dai
 573                  */
 574                 INIT_LIST_HEAD(&rdai[i].playback.head);
 575                 INIT_LIST_HEAD(&rdai[i].capture.head);
 576
 577                 snprintf(rdai[i].name, RSND_DAI_NAME_SIZE, "rsnd-dai.%d", i);
 578
 579                 /*
 580                  *      init snd_soc_dai_driver
 581                  */
 582                 drv[i].name     = rdai[i].name;
 583                 drv[i].ops      = &rsnd_soc_dai_ops;
 584                 if (pmod) {
 585                         drv[i].playback.rates           = RSND_RATES;
 586                         drv[i].playback.formats         = RSND_FMTS;
 587                         drv[i].playback.channels_min    = 2;
 588                         drv[i].playback.channels_max    = 2;
 589                 }
 590                 if (cmod) {
 591                         drv[i].capture.rates            = RSND_RATES;
 592                         drv[i].capture.formats          = RSND_FMTS;
 593                         drv[i].capture.channels_min     = 2;
 594                         drv[i].capture.channels_max     = 2;
 595                 }
 596
 597                 dev_dbg(dev, "%s (%s/%s)\n", rdai[i].name,
 598                         pmod ? "play"    : " -- ",
 599                         cmod ? "capture" : "  --   ");
 600         }
 601
 602         priv->dai_nr    = dai_nr;
 603         priv->daidrv    = drv;
 604         priv->rdai      = rdai;
 605
 606         return 0;
 607 }
 608
 609 static void rsnd_dai_remove(struct platform_device *pdev,
 610                           struct rsnd_priv *priv)
 611 {
 612 }
 613
 614 /*
 615  *              pcm ops
 616  */
 617 static struct snd_pcm_hardware rsnd_pcm_hardware = {
 618         .info =         SNDRV_PCM_INFO_INTERLEAVED      |
 619                         SNDRV_PCM_INFO_MMAP             |
 620                         SNDRV_PCM_INFO_MMAP_VALID       |
 621                         SNDRV_PCM_INFO_PAUSE,
 622         .formats                = RSND_FMTS,
 623         .rates                  = RSND_RATES,
 624         .rate_min               = 8000,
 625         .rate_max               = 192000,
 626         .channels_min           = 2,
 627         .channels_max           = 2,
 628         .buffer_bytes_max       = 64 * 1024,
 629         .period_bytes_min       = 32,
 630         .period_bytes_max       = 8192,
 631         .periods_min            = 1,
 632         .periods_max            = 32,
 633         .fifo_size              = 256,
 634 };
 635
 636 static int rsnd_pcm_open(struct snd_pcm_substream *substream)
 637 {
 638         struct snd_pcm_runtime *runtime = substream->runtime;
 639         int ret = 0;
 640
 641         snd_soc_set_runtime_hwparams(substream, &rsnd_pcm_hardware);
 642
 643         ret = snd_pcm_hw_constraint_integer(runtime,
 644                                             SNDRV_PCM_HW_PARAM_PERIODS);
 645
 646         return ret;
 647 }
 648
 649 static int rsnd_hw_params(struct snd_pcm_substream *substream,
 650                          struct snd_pcm_hw_params *hw_params)
 651 {
 652         return snd_pcm_lib_malloc_pages(substream,
 653                                         params_buffer_bytes(hw_params));
 654 }
 655
 656 static snd_pcm_uframes_t rsnd_pointer(struct snd_pcm_substream *substream)
 657 {
 658         struct snd_pcm_runtime *runtime = substream->runtime;
 659         struct snd_soc_dai *dai = rsnd_substream_to_dai(substream);
 660         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
 661         struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream);
 662
 663         return bytes_to_frames(runtime, io->byte_pos);
 664 }
 665
 666 static struct snd_pcm_ops rsnd_pcm_ops = {
 667         .open           = rsnd_pcm_open,
 668         .ioctl          = snd_pcm_lib_ioctl,
 669         .hw_params      = rsnd_hw_params,
 670         .hw_free        = snd_pcm_lib_free_pages,
 671         .pointer        = rsnd_pointer,
 672 };
 673
 674 /*
 675  *              snd_soc_platform
 676  */
 677
 678 #define PREALLOC_BUFFER         (32 * 1024)
 679 #define PREALLOC_BUFFER_MAX     (32 * 1024)
 680
 681 static int rsnd_pcm_new(struct snd_soc_pcm_runtime *rtd)
 682 {
 683         return snd_pcm_lib_preallocate_pages_for_all(
 684                 rtd->pcm,
 685                 SNDRV_DMA_TYPE_DEV,
 686                 rtd->card->snd_card->dev,
 687                 PREALLOC_BUFFER, PREALLOC_BUFFER_MAX);
 688 }
 689
 690 static void rsnd_pcm_free(struct snd_pcm *pcm)
 691 {
 692         snd_pcm_lib_preallocate_free_for_all(pcm);
 693 }
 694
 695 static struct snd_soc_platform_driver rsnd_soc_platform = {
 696         .ops            = &rsnd_pcm_ops,
 697         .pcm_new        = rsnd_pcm_new,
 698         .pcm_free       = rsnd_pcm_free,
 699 };
 700
 701 static const struct snd_soc_component_driver rsnd_soc_component = {
 702         .name           = "rsnd",
 703 };
 704
 705 /*
 706  *      rsnd probe
 707  */
 708 static int rsnd_probe(struct platform_device *pdev)
 709 {
 710         struct rcar_snd_info *info;
 711         struct rsnd_priv *priv;
 712         struct device *dev = &pdev->dev;
 713         int ret;
 714
 715         info = pdev->dev.platform_data;
 716         if (!info) {
 717                 dev_err(dev, "driver needs R-Car sound information\n");
 718                 return -ENODEV;
 719         }
 720
 721         /*
 722          *      init priv data
 723          */
 724         priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
 725         if (!priv) {
 726                 dev_err(dev, "priv allocate failed\n");
 727                 return -ENODEV;
 728         }
 729
 730         priv->dev       = dev;
 731         priv->info      = info;
 732         spin_lock_init(&priv->lock);
 733
 734         /*
 735          *      init each module
 736          */
 737         ret = rsnd_gen_probe(pdev, info, priv);
 738         if (ret < 0)
 739                 return ret;
 740
 741         ret = rsnd_scu_probe(pdev, info, priv);
 742         if (ret < 0)
 743                 return ret;
 744
 745         ret = rsnd_adg_probe(pdev, info, priv);
 746         if (ret < 0)
 747                 return ret;
 748
 749         ret = rsnd_ssi_probe(pdev, info, priv);
 750         if (ret < 0)
 751                 return ret;
 752
 753         ret = rsnd_dai_probe(pdev, info, priv);
 754         if (ret < 0)
 755                 return ret;
 756
 757         /*
 758          *      asoc register
 759          */
 760         ret = snd_soc_register_platform(dev, &rsnd_soc_platform);
 761         if (ret < 0) {
 762                 dev_err(dev, "cannot snd soc register\n");
 763                 return ret;
 764         }
 765
 766         ret = snd_soc_register_component(dev, &rsnd_soc_component,
 767                                          priv->daidrv, rsnd_dai_nr(priv));
 768         if (ret < 0) {
 769                 dev_err(dev, "cannot snd dai register\n");
 770                 goto exit_snd_soc;
 771         }
 772
 773         dev_set_drvdata(dev, priv);
 774
 775         pm_runtime_enable(dev);
 776
 777         dev_info(dev, "probed\n");
 778         return ret;
 779
 780 exit_snd_soc:
 781         snd_soc_unregister_platform(dev);
 782
 783         return ret;
 784 }
 785
 786 static int rsnd_remove(struct platform_device *pdev)
 787 {
 788         struct rsnd_priv *priv = dev_get_drvdata(&pdev->dev);
 789
 790         pm_runtime_disable(&pdev->dev);
 791
 792         /*
 793          *      remove each module
 794          */
 795         rsnd_ssi_remove(pdev, priv);
 796         rsnd_adg_remove(pdev, priv);
 797         rsnd_scu_remove(pdev, priv);
 798         rsnd_dai_remove(pdev, priv);
 799         rsnd_gen_remove(pdev, priv);
 800
 801         return 0;
 802 }
 803
 804 static struct platform_driver rsnd_driver = {
 805         .driver = {
 806                 .name   = "rcar_sound",
 807         },
 808         .probe          = rsnd_probe,
 809         .remove         = rsnd_remove,
 810 };
 811 module_platform_driver(rsnd_driver);
 812
 813 MODULE_LICENSE("GPL");
 814 MODULE_DESCRIPTION("Renesas R-Car audio driver");
 815 MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");
 816 MODULE_ALIAS("platform:rcar-pcm-audio");