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 <linux/shdma-base.h>
  98 #include "rsnd.h"
  99
 100 #define RSND_RATES SNDRV_PCM_RATE_8000_96000
 101 #define RSND_FMTS (SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S16_LE)
 102
 103 /*
 104  *      rsnd_platform functions
 105  */
 106 #define rsnd_platform_call(priv, dai, func, param...)   \
 107         (!(priv->info->func) ? 0 :              \
 108          priv->info->func(param))
 109
 110 /*
 111  *      rsnd_mod functions
 112  */
 113 char *rsnd_mod_name(struct rsnd_mod *mod)
 114 {
 115         if (!mod || !mod->ops)
 116                 return "unknown";
 117
 118         return mod->ops->name;
 119 }
 120
 121 void rsnd_mod_init(struct rsnd_priv *priv,
 122                    struct rsnd_mod *mod,
 123                    struct rsnd_mod_ops *ops,
 124                    int id)
 125 {
 126         mod->priv       = priv;
 127         mod->id         = id;
 128         mod->ops        = ops;
 129         INIT_LIST_HEAD(&mod->list);
 130 }
 131
 132 /*
 133  *      rsnd_dma functions
 134  */
 135 static void rsnd_dma_continue(struct rsnd_dma *dma)
 136 {
 137         /* push next A or B plane */
 138         dma->submit_loop = 1;
 139         schedule_work(&dma->work);
 140 }
 141
 142 void rsnd_dma_start(struct rsnd_dma *dma)
 143 {
 144         /* push both A and B plane*/
 145         dma->submit_loop = 2;
 146         schedule_work(&dma->work);
 147 }
 148
 149 void rsnd_dma_stop(struct rsnd_dma *dma)
 150 {
 151         dma->submit_loop = 0;
 152         cancel_work_sync(&dma->work);
 153         dmaengine_terminate_all(dma->chan);
 154 }
 155
 156 static void rsnd_dma_complete(void *data)
 157 {
 158         struct rsnd_dma *dma = (struct rsnd_dma *)data;
 159         struct rsnd_priv *priv = dma->priv;
 160         unsigned long flags;
 161
 162         rsnd_lock(priv, flags);
 163
 164         dma->complete(dma);
 165
 166         if (dma->submit_loop)
 167                 rsnd_dma_continue(dma);
 168
 169         rsnd_unlock(priv, flags);
 170 }
 171
 172 static void rsnd_dma_do_work(struct work_struct *work)
 173 {
 174         struct rsnd_dma *dma = container_of(work, struct rsnd_dma, work);
 175         struct rsnd_priv *priv = dma->priv;
 176         struct device *dev = rsnd_priv_to_dev(priv);
 177         struct dma_async_tx_descriptor *desc;
 178         dma_addr_t buf;
 179         size_t len;
 180         int i;
 181
 182         for (i = 0; i < dma->submit_loop; i++) {
 183
 184                 if (dma->inquiry(dma, &buf, &len) < 0)
 185                         return;
 186
 187                 desc = dmaengine_prep_slave_single(
 188                         dma->chan, buf, len, dma->dir,
 189                         DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
 190                 if (!desc) {
 191                         dev_err(dev, "dmaengine_prep_slave_sg() fail\n");
 192                         return;
 193                 }
 194
 195                 desc->callback          = rsnd_dma_complete;
 196                 desc->callback_param    = dma;
 197
 198                 if (dmaengine_submit(desc) < 0) {
 199                         dev_err(dev, "dmaengine_submit() fail\n");
 200                         return;
 201                 }
 202
 203                 dma_async_issue_pending(dma->chan);
 204         }
 205 }
 206
 207 int rsnd_dma_available(struct rsnd_dma *dma)
 208 {
 209         return !!dma->chan;
 210 }
 211
 212 int rsnd_dma_init(struct rsnd_priv *priv, struct rsnd_dma *dma,
 213                   int is_play, int id,
 214                   int (*inquiry)(struct rsnd_dma *dma,
 215                                   dma_addr_t *buf, int *len),
 216                   int (*complete)(struct rsnd_dma *dma))
 217 {
 218         struct device *dev = rsnd_priv_to_dev(priv);
 219         struct dma_slave_config cfg;
 220         dma_cap_mask_t mask;
 221         int ret;
 222
 223         if (dma->chan) {
 224                 dev_err(dev, "it already has dma channel\n");
 225                 return -EIO;
 226         }
 227
 228         dma_cap_zero(mask);
 229         dma_cap_set(DMA_SLAVE, mask);
 230
 231         dma->chan = dma_request_slave_channel_compat(mask, shdma_chan_filter,
 232                                                      (void *)id, dev,
 233                                                      is_play ? "tx" : "rx");
 234         if (!dma->chan) {
 235                 dev_err(dev, "can't get dma channel\n");
 236                 return -EIO;
 237         }
 238
 239         cfg.slave_id    = id;
 240         cfg.dst_addr    = 0; /* use default addr when playback */
 241         cfg.src_addr    = 0; /* use default addr when capture */
 242         cfg.direction   = is_play ? DMA_MEM_TO_DEV : DMA_DEV_TO_MEM;
 243
 244         ret = dmaengine_slave_config(dma->chan, &cfg);
 245         if (ret < 0)
 246                 goto rsnd_dma_init_err;
 247
 248         dma->dir = is_play ? DMA_TO_DEVICE : DMA_FROM_DEVICE;
 249         dma->priv = priv;
 250         dma->inquiry = inquiry;
 251         dma->complete = complete;
 252         INIT_WORK(&dma->work, rsnd_dma_do_work);
 253
 254         return 0;
 255
 256 rsnd_dma_init_err:
 257         rsnd_dma_quit(priv, dma);
 258
 259         return ret;
 260 }
 261
 262 void  rsnd_dma_quit(struct rsnd_priv *priv,
 263                     struct rsnd_dma *dma)
 264 {
 265         if (dma->chan)
 266                 dma_release_channel(dma->chan);
 267
 268         dma->chan = NULL;
 269 }
 270
 271 /*
 272  *      rsnd_dai functions
 273  */
 274 #define rsnd_dai_call(rdai, io, fn)                     \
 275 ({                                                      \
 276         struct rsnd_mod *mod, *n;                       \
 277         int ret = 0;                                    \
 278         for_each_rsnd_mod(mod, n, io) {                 \
 279                 ret = rsnd_mod_call(mod, fn, rdai, io); \
 280                 if (ret < 0)                            \
 281                         break;                          \
 282         }                                               \
 283         ret;                                            \
 284 })
 285
 286 int rsnd_dai_connect(struct rsnd_dai *rdai,
 287                      struct rsnd_mod *mod,
 288                      struct rsnd_dai_stream *io)
 289 {
 290         if (!mod)
 291                 return -EIO;
 292
 293         if (!list_empty(&mod->list)) {
 294                 struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
 295                 struct device *dev = rsnd_priv_to_dev(priv);
 296
 297                 dev_err(dev, "%s%d is not empty\n",
 298                         rsnd_mod_name(mod),
 299                         rsnd_mod_id(mod));
 300                 return -EIO;
 301         }
 302
 303         list_add_tail(&mod->list, &io->head);
 304
 305         return 0;
 306 }
 307
 308 int rsnd_dai_disconnect(struct rsnd_mod *mod)
 309 {
 310         list_del_init(&mod->list);
 311
 312         return 0;
 313 }
 314
 315 int rsnd_dai_id(struct rsnd_priv *priv, struct rsnd_dai *rdai)
 316 {
 317         int id = rdai - priv->rdai;
 318
 319         if ((id < 0) || (id >= rsnd_dai_nr(priv)))
 320                 return -EINVAL;
 321
 322         return id;
 323 }
 324
 325 struct rsnd_dai *rsnd_dai_get(struct rsnd_priv *priv, int id)
 326 {
 327         if ((id < 0) || (id >= rsnd_dai_nr(priv)))
 328                 return NULL;
 329
 330         return priv->rdai + id;
 331 }
 332
 333 static struct rsnd_dai *rsnd_dai_to_rdai(struct snd_soc_dai *dai)
 334 {
 335         struct rsnd_priv *priv = snd_soc_dai_get_drvdata(dai);
 336
 337         return rsnd_dai_get(priv, dai->id);
 338 }
 339
 340 int rsnd_dai_is_play(struct rsnd_dai *rdai, struct rsnd_dai_stream *io)
 341 {
 342         return &rdai->playback == io;
 343 }
 344
 345 /*
 346  *      rsnd_soc_dai functions
 347  */
 348 int rsnd_dai_pointer_offset(struct rsnd_dai_stream *io, int additional)
 349 {
 350         struct snd_pcm_substream *substream = io->substream;
 351         struct snd_pcm_runtime *runtime = substream->runtime;
 352         int pos = io->byte_pos + additional;
 353
 354         pos %= (runtime->periods * io->byte_per_period);
 355
 356         return pos;
 357 }
 358
 359 void rsnd_dai_pointer_update(struct rsnd_dai_stream *io, int byte)
 360 {
 361         io->byte_pos += byte;
 362
 363         if (io->byte_pos >= io->next_period_byte) {
 364                 struct snd_pcm_substream *substream = io->substream;
 365                 struct snd_pcm_runtime *runtime = substream->runtime;
 366
 367                 io->period_pos++;
 368                 io->next_period_byte += io->byte_per_period;
 369
 370                 if (io->period_pos >= runtime->periods) {
 371                         io->byte_pos = 0;
 372                         io->period_pos = 0;
 373                         io->next_period_byte = io->byte_per_period;
 374                 }
 375
 376                 snd_pcm_period_elapsed(substream);
 377         }
 378 }
 379
 380 static int rsnd_dai_stream_init(struct rsnd_dai_stream *io,
 381                                 struct snd_pcm_substream *substream)
 382 {
 383         struct snd_pcm_runtime *runtime = substream->runtime;
 384
 385         if (!list_empty(&io->head))
 386                 return -EIO;
 387
 388         INIT_LIST_HEAD(&io->head);
 389         io->substream           = substream;
 390         io->byte_pos            = 0;
 391         io->period_pos          = 0;
 392         io->byte_per_period     = runtime->period_size *
 393                                   runtime->channels *
 394                                   samples_to_bytes(runtime, 1);
 395         io->next_period_byte    = io->byte_per_period;
 396
 397         return 0;
 398 }
 399
 400 static
 401 struct snd_soc_dai *rsnd_substream_to_dai(struct snd_pcm_substream *substream)
 402 {
 403         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 404
 405         return  rtd->cpu_dai;
 406 }
 407
 408 static
 409 struct rsnd_dai_stream *rsnd_rdai_to_io(struct rsnd_dai *rdai,
 410                                         struct snd_pcm_substream *substream)
 411 {
 412         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 413                 return &rdai->playback;
 414         else
 415                 return &rdai->capture;
 416 }
 417
 418 static int rsnd_soc_dai_trigger(struct snd_pcm_substream *substream, int cmd,
 419                             struct snd_soc_dai *dai)
 420 {
 421         struct rsnd_priv *priv = snd_soc_dai_get_drvdata(dai);
 422         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
 423         struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream);
 424         struct rsnd_mod *mod = rsnd_ssi_mod_get_frm_dai(priv,
 425                                                 rsnd_dai_id(priv, rdai),
 426                                                 rsnd_dai_is_play(rdai, io));
 427         int ssi_id = rsnd_mod_id(mod);
 428         int ret;
 429         unsigned long flags;
 430
 431         rsnd_lock(priv, flags);
 432
 433         switch (cmd) {
 434         case SNDRV_PCM_TRIGGER_START:
 435                 ret = rsnd_dai_stream_init(io, substream);
 436                 if (ret < 0)
 437                         goto dai_trigger_end;
 438
 439                 ret = rsnd_platform_call(priv, dai, start, ssi_id);
 440                 if (ret < 0)
 441                         goto dai_trigger_end;
 442
 443                 ret = rsnd_gen_path_init(priv, rdai, io);
 444                 if (ret < 0)
 445                         goto dai_trigger_end;
 446
 447                 ret = rsnd_dai_call(rdai, io, init);
 448                 if (ret < 0)
 449                         goto dai_trigger_end;
 450
 451                 ret = rsnd_dai_call(rdai, io, start);
 452                 if (ret < 0)
 453                         goto dai_trigger_end;
 454                 break;
 455         case SNDRV_PCM_TRIGGER_STOP:
 456                 ret = rsnd_dai_call(rdai, io, stop);
 457                 if (ret < 0)
 458                         goto dai_trigger_end;
 459
 460                 ret = rsnd_dai_call(rdai, io, quit);
 461                 if (ret < 0)
 462                         goto dai_trigger_end;
 463
 464                 ret = rsnd_gen_path_exit(priv, rdai, io);
 465                 if (ret < 0)
 466                         goto dai_trigger_end;
 467
 468                 ret = rsnd_platform_call(priv, dai, stop, ssi_id);
 469                 if (ret < 0)
 470                         goto dai_trigger_end;
 471                 break;
 472         default:
 473                 ret = -EINVAL;
 474         }
 475
 476 dai_trigger_end:
 477         rsnd_unlock(priv, flags);
 478
 479         return ret;
 480 }
 481
 482 static int rsnd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
 483 {
 484         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
 485
 486         /* set master/slave audio interface */
 487         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 488         case SND_SOC_DAIFMT_CBM_CFM:
 489                 rdai->clk_master = 1;
 490                 break;
 491         case SND_SOC_DAIFMT_CBS_CFS:
 492                 rdai->clk_master = 0;
 493                 break;
 494         default:
 495                 return -EINVAL;
 496         }
 497
 498         /* set clock inversion */
 499         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
 500         case SND_SOC_DAIFMT_NB_IF:
 501                 rdai->bit_clk_inv = 0;
 502                 rdai->frm_clk_inv = 1;
 503                 break;
 504         case SND_SOC_DAIFMT_IB_NF:
 505                 rdai->bit_clk_inv = 1;
 506                 rdai->frm_clk_inv = 0;
 507                 break;
 508         case SND_SOC_DAIFMT_IB_IF:
 509                 rdai->bit_clk_inv = 1;
 510                 rdai->frm_clk_inv = 1;
 511                 break;
 512         case SND_SOC_DAIFMT_NB_NF:
 513         default:
 514                 rdai->bit_clk_inv = 0;
 515                 rdai->frm_clk_inv = 0;
 516                 break;
 517         }
 518
 519         /* set format */
 520         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 521         case SND_SOC_DAIFMT_I2S:
 522                 rdai->sys_delay = 0;
 523                 rdai->data_alignment = 0;
 524                 break;
 525         case SND_SOC_DAIFMT_LEFT_J:
 526                 rdai->sys_delay = 1;
 527                 rdai->data_alignment = 0;
 528                 break;
 529         case SND_SOC_DAIFMT_RIGHT_J:
 530                 rdai->sys_delay = 1;
 531                 rdai->data_alignment = 1;
 532                 break;
 533         }
 534
 535         return 0;
 536 }
 537
 538 static const struct snd_soc_dai_ops rsnd_soc_dai_ops = {
 539         .trigger        = rsnd_soc_dai_trigger,
 540         .set_fmt        = rsnd_soc_dai_set_fmt,
 541 };
 542
 543 static int rsnd_dai_probe(struct platform_device *pdev,
 544                           struct rcar_snd_info *info,
 545                           struct rsnd_priv *priv)
 546 {
 547         struct snd_soc_dai_driver *drv;
 548         struct rsnd_dai *rdai;
 549         struct rsnd_mod *pmod, *cmod;
 550         struct device *dev = rsnd_priv_to_dev(priv);
 551         int dai_nr;
 552         int i;
 553
 554         /* get max dai nr */
 555         for (dai_nr = 0; dai_nr < 32; dai_nr++) {
 556                 pmod = rsnd_ssi_mod_get_frm_dai(priv, dai_nr, 1);
 557                 cmod = rsnd_ssi_mod_get_frm_dai(priv, dai_nr, 0);
 558
 559                 if (!pmod && !cmod)
 560                         break;
 561         }
 562
 563         if (!dai_nr) {
 564                 dev_err(dev, "no dai\n");
 565                 return -EIO;
 566         }
 567
 568         drv  = devm_kzalloc(dev, sizeof(*drv)  * dai_nr, GFP_KERNEL);
 569         rdai = devm_kzalloc(dev, sizeof(*rdai) * dai_nr, GFP_KERNEL);
 570         if (!drv || !rdai) {
 571                 dev_err(dev, "dai allocate failed\n");
 572                 return -ENOMEM;
 573         }
 574
 575         for (i = 0; i < dai_nr; i++) {
 576
 577                 pmod = rsnd_ssi_mod_get_frm_dai(priv, i, 1);
 578                 cmod = rsnd_ssi_mod_get_frm_dai(priv, i, 0);
 579
 580                 /*
 581                  *      init rsnd_dai
 582                  */
 583                 INIT_LIST_HEAD(&rdai[i].playback.head);
 584                 INIT_LIST_HEAD(&rdai[i].capture.head);
 585
 586                 snprintf(rdai[i].name, RSND_DAI_NAME_SIZE, "rsnd-dai.%d", i);
 587
 588                 /*
 589                  *      init snd_soc_dai_driver
 590                  */
 591                 drv[i].name     = rdai[i].name;
 592                 drv[i].ops      = &rsnd_soc_dai_ops;
 593                 if (pmod) {
 594                         drv[i].playback.rates           = RSND_RATES;
 595                         drv[i].playback.formats         = RSND_FMTS;
 596                         drv[i].playback.channels_min    = 2;
 597                         drv[i].playback.channels_max    = 2;
 598                 }
 599                 if (cmod) {
 600                         drv[i].capture.rates            = RSND_RATES;
 601                         drv[i].capture.formats          = RSND_FMTS;
 602                         drv[i].capture.channels_min     = 2;
 603                         drv[i].capture.channels_max     = 2;
 604                 }
 605
 606                 dev_dbg(dev, "%s (%s/%s)\n", rdai[i].name,
 607                         pmod ? "play"    : " -- ",
 608                         cmod ? "capture" : "  --   ");
 609         }
 610
 611         priv->dai_nr    = dai_nr;
 612         priv->daidrv    = drv;
 613         priv->rdai      = rdai;
 614
 615         return 0;
 616 }
 617
 618 static void rsnd_dai_remove(struct platform_device *pdev,
 619                           struct rsnd_priv *priv)
 620 {
 621 }
 622
 623 /*
 624  *              pcm ops
 625  */
 626 static struct snd_pcm_hardware rsnd_pcm_hardware = {
 627         .info =         SNDRV_PCM_INFO_INTERLEAVED      |
 628                         SNDRV_PCM_INFO_MMAP             |
 629                         SNDRV_PCM_INFO_MMAP_VALID       |
 630                         SNDRV_PCM_INFO_PAUSE,
 631         .buffer_bytes_max       = 64 * 1024,
 632         .period_bytes_min       = 32,
 633         .period_bytes_max       = 8192,
 634         .periods_min            = 1,
 635         .periods_max            = 32,
 636         .fifo_size              = 256,
 637 };
 638
 639 static int rsnd_pcm_open(struct snd_pcm_substream *substream)
 640 {
 641         struct snd_pcm_runtime *runtime = substream->runtime;
 642         int ret = 0;
 643
 644         snd_soc_set_runtime_hwparams(substream, &rsnd_pcm_hardware);
 645
 646         ret = snd_pcm_hw_constraint_integer(runtime,
 647                                             SNDRV_PCM_HW_PARAM_PERIODS);
 648
 649         return ret;
 650 }
 651
 652 static int rsnd_hw_params(struct snd_pcm_substream *substream,
 653                          struct snd_pcm_hw_params *hw_params)
 654 {
 655         return snd_pcm_lib_malloc_pages(substream,
 656                                         params_buffer_bytes(hw_params));
 657 }
 658
 659 static snd_pcm_uframes_t rsnd_pointer(struct snd_pcm_substream *substream)
 660 {
 661         struct snd_pcm_runtime *runtime = substream->runtime;
 662         struct snd_soc_dai *dai = rsnd_substream_to_dai(substream);
 663         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
 664         struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream);
 665
 666         return bytes_to_frames(runtime, io->byte_pos);
 667 }
 668
 669 static struct snd_pcm_ops rsnd_pcm_ops = {
 670         .open           = rsnd_pcm_open,
 671         .ioctl          = snd_pcm_lib_ioctl,
 672         .hw_params      = rsnd_hw_params,
 673         .hw_free        = snd_pcm_lib_free_pages,
 674         .pointer        = rsnd_pointer,
 675 };
 676
 677 /*
 678  *              snd_soc_platform
 679  */
 680
 681 #define PREALLOC_BUFFER         (32 * 1024)
 682 #define PREALLOC_BUFFER_MAX     (32 * 1024)
 683
 684 static int rsnd_pcm_new(struct snd_soc_pcm_runtime *rtd)
 685 {
 686         return snd_pcm_lib_preallocate_pages_for_all(
 687                 rtd->pcm,
 688                 SNDRV_DMA_TYPE_DEV,
 689                 rtd->card->snd_card->dev,
 690                 PREALLOC_BUFFER, PREALLOC_BUFFER_MAX);
 691 }
 692
 693 static void rsnd_pcm_free(struct snd_pcm *pcm)
 694 {
 695         snd_pcm_lib_preallocate_free_for_all(pcm);
 696 }
 697
 698 static struct snd_soc_platform_driver rsnd_soc_platform = {
 699         .ops            = &rsnd_pcm_ops,
 700         .pcm_new        = rsnd_pcm_new,
 701         .pcm_free       = rsnd_pcm_free,
 702 };
 703
 704 static const struct snd_soc_component_driver rsnd_soc_component = {
 705         .name           = "rsnd",
 706 };
 707
 708 /*
 709  *      rsnd probe
 710  */
 711 static int rsnd_probe(struct platform_device *pdev)
 712 {
 713         struct rcar_snd_info *info;
 714         struct rsnd_priv *priv;
 715         struct device *dev = &pdev->dev;
 716         int ret;
 717
 718         info = pdev->dev.platform_data;
 719         if (!info) {
 720                 dev_err(dev, "driver needs R-Car sound information\n");
 721                 return -ENODEV;
 722         }
 723
 724         /*
 725          *      init priv data
 726          */
 727         priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
 728         if (!priv) {
 729                 dev_err(dev, "priv allocate failed\n");
 730                 return -ENODEV;
 731         }
 732
 733         priv->dev       = dev;
 734         priv->info      = info;
 735         spin_lock_init(&priv->lock);
 736
 737         /*
 738          *      init each module
 739          */
 740         ret = rsnd_gen_probe(pdev, info, priv);
 741         if (ret < 0)
 742                 return ret;
 743
 744         ret = rsnd_scu_probe(pdev, info, priv);
 745         if (ret < 0)
 746                 return ret;
 747
 748         ret = rsnd_adg_probe(pdev, info, priv);
 749         if (ret < 0)
 750                 return ret;
 751
 752         ret = rsnd_ssi_probe(pdev, info, priv);
 753         if (ret < 0)
 754                 return ret;
 755
 756         ret = rsnd_dai_probe(pdev, info, priv);
 757         if (ret < 0)
 758                 return ret;
 759
 760         /*
 761          *      asoc register
 762          */
 763         ret = snd_soc_register_platform(dev, &rsnd_soc_platform);
 764         if (ret < 0) {
 765                 dev_err(dev, "cannot snd soc register\n");
 766                 return ret;
 767         }
 768
 769         ret = snd_soc_register_component(dev, &rsnd_soc_component,
 770                                          priv->daidrv, rsnd_dai_nr(priv));
 771         if (ret < 0) {
 772                 dev_err(dev, "cannot snd dai register\n");
 773                 goto exit_snd_soc;
 774         }
 775
 776         dev_set_drvdata(dev, priv);
 777
 778         pm_runtime_enable(dev);
 779
 780         dev_info(dev, "probed\n");
 781         return ret;
 782
 783 exit_snd_soc:
 784         snd_soc_unregister_platform(dev);
 785
 786         return ret;
 787 }
 788
 789 static int rsnd_remove(struct platform_device *pdev)
 790 {
 791         struct rsnd_priv *priv = dev_get_drvdata(&pdev->dev);
 792
 793         pm_runtime_disable(&pdev->dev);
 794
 795         /*
 796          *      remove each module
 797          */
 798         rsnd_ssi_remove(pdev, priv);
 799         rsnd_adg_remove(pdev, priv);
 800         rsnd_scu_remove(pdev, priv);
 801         rsnd_dai_remove(pdev, priv);
 802         rsnd_gen_remove(pdev, priv);
 803
 804         return 0;
 805 }
 806
 807 static struct platform_driver rsnd_driver = {
 808         .driver = {
 809                 .name   = "rcar_sound",
 810         },
 811         .probe          = rsnd_probe,
 812         .remove         = rsnd_remove,
 813 };
 814 module_platform_driver(rsnd_driver);
 815
 816 MODULE_LICENSE("GPL");
 817 MODULE_DESCRIPTION("Renesas R-Car audio driver");
 818 MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");
 819 MODULE_ALIAS("platform:rcar-pcm-audio");