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