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_start(struct rsnd_dma *dma);
 136 static void rsnd_dma_continue(struct rsnd_dma *dma)
 137 {
 138         /* push next A or B plane */
 139         dma->submit_loop = 1;
 140         schedule_work(&dma->work);
 141 }
 142
 143 void rsnd_dma_start(struct rsnd_dma *dma)
 144 {
 145         /* push both A and B plane*/
 146         dma->submit_loop = 2;
 147         __rsnd_dma_start(dma);
 148 }
 149
 150 void rsnd_dma_stop(struct rsnd_dma *dma)
 151 {
 152         dma->submit_loop = 0;
 153         cancel_work_sync(&dma->work);
 154         dmaengine_terminate_all(dma->chan);
 155 }
 156
 157 static void rsnd_dma_complete(void *data)
 158 {
 159         struct rsnd_dma *dma = (struct rsnd_dma *)data;
 160         struct rsnd_priv *priv = rsnd_mod_to_priv(rsnd_dma_to_mod(dma));
 161         unsigned long flags;
 162
 163         rsnd_lock(priv, flags);
 164
 165         dma->complete(dma);
 166
 167         if (dma->submit_loop)
 168                 rsnd_dma_continue(dma);
 169
 170         rsnd_unlock(priv, flags);
 171 }
 172
 173 static void __rsnd_dma_start(struct rsnd_dma *dma)
 174 {
 175         struct rsnd_priv *priv = rsnd_mod_to_priv(rsnd_dma_to_mod(dma));
 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 static void rsnd_dma_do_work(struct work_struct *work)
 208 {
 209         struct rsnd_dma *dma = container_of(work, struct rsnd_dma, work);
 210
 211         __rsnd_dma_start(dma);
 212 }
 213
 214 int rsnd_dma_available(struct rsnd_dma *dma)
 215 {
 216         return !!dma->chan;
 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         struct dma_slave_config cfg;
 227         dma_cap_mask_t mask;
 228         int ret;
 229
 230         if (dma->chan) {
 231                 dev_err(dev, "it already has dma channel\n");
 232                 return -EIO;
 233         }
 234
 235         dma_cap_zero(mask);
 236         dma_cap_set(DMA_SLAVE, mask);
 237
 238         dma->chan = dma_request_slave_channel_compat(mask, shdma_chan_filter,
 239                                                      (void *)id, dev,
 240                                                      is_play ? "tx" : "rx");
 241         if (!dma->chan) {
 242                 dev_err(dev, "can't get dma channel\n");
 243                 return -EIO;
 244         }
 245
 246         cfg.slave_id    = id;
 247         cfg.dst_addr    = 0; /* use default addr when playback */
 248         cfg.src_addr    = 0; /* use default addr when capture */
 249         cfg.direction   = is_play ? DMA_MEM_TO_DEV : DMA_DEV_TO_MEM;
 250
 251         ret = dmaengine_slave_config(dma->chan, &cfg);
 252         if (ret < 0)
 253                 goto rsnd_dma_init_err;
 254
 255         dma->dir = is_play ? DMA_TO_DEVICE : DMA_FROM_DEVICE;
 256         dma->inquiry = inquiry;
 257         dma->complete = complete;
 258         INIT_WORK(&dma->work, rsnd_dma_do_work);
 259
 260         return 0;
 261
 262 rsnd_dma_init_err:
 263         rsnd_dma_quit(priv, dma);
 264
 265         return ret;
 266 }
 267
 268 void  rsnd_dma_quit(struct rsnd_priv *priv,
 269                     struct rsnd_dma *dma)
 270 {
 271         if (dma->chan)
 272                 dma_release_channel(dma->chan);
 273
 274         dma->chan = NULL;
 275 }
 276
 277 /*
 278  *      rsnd_dai functions
 279  */
 280 #define rsnd_dai_call(rdai, io, fn)                     \
 281 ({                                                      \
 282         struct rsnd_mod *mod, *n;                       \
 283         int ret = 0;                                    \
 284         for_each_rsnd_mod(mod, n, io) {                 \
 285                 ret = rsnd_mod_call(mod, fn, rdai, io); \
 286                 if (ret < 0)                            \
 287                         break;                          \
 288         }                                               \
 289         ret;                                            \
 290 })
 291
 292 int rsnd_dai_connect(struct rsnd_dai *rdai,
 293                      struct rsnd_mod *mod,
 294                      struct rsnd_dai_stream *io)
 295 {
 296         if (!mod)
 297                 return -EIO;
 298
 299         if (!list_empty(&mod->list)) {
 300                 struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
 301                 struct device *dev = rsnd_priv_to_dev(priv);
 302
 303                 dev_err(dev, "%s%d is not empty\n",
 304                         rsnd_mod_name(mod),
 305                         rsnd_mod_id(mod));
 306                 return -EIO;
 307         }
 308
 309         list_add_tail(&mod->list, &io->head);
 310
 311         return 0;
 312 }
 313
 314 int rsnd_dai_disconnect(struct rsnd_mod *mod)
 315 {
 316         list_del_init(&mod->list);
 317
 318         return 0;
 319 }
 320
 321 int rsnd_dai_id(struct rsnd_priv *priv, struct rsnd_dai *rdai)
 322 {
 323         int id = rdai - priv->rdai;
 324
 325         if ((id < 0) || (id >= rsnd_dai_nr(priv)))
 326                 return -EINVAL;
 327
 328         return id;
 329 }
 330
 331 struct rsnd_dai *rsnd_dai_get(struct rsnd_priv *priv, int id)
 332 {
 333         if ((id < 0) || (id >= rsnd_dai_nr(priv)))
 334                 return NULL;
 335
 336         return priv->rdai + id;
 337 }
 338
 339 static struct rsnd_dai *rsnd_dai_to_rdai(struct snd_soc_dai *dai)
 340 {
 341         struct rsnd_priv *priv = snd_soc_dai_get_drvdata(dai);
 342
 343         return rsnd_dai_get(priv, dai->id);
 344 }
 345
 346 int rsnd_dai_is_play(struct rsnd_dai *rdai, struct rsnd_dai_stream *io)
 347 {
 348         return &rdai->playback == io;
 349 }
 350
 351 /*
 352  *      rsnd_soc_dai functions
 353  */
 354 int rsnd_dai_pointer_offset(struct rsnd_dai_stream *io, int additional)
 355 {
 356         struct snd_pcm_substream *substream = io->substream;
 357         struct snd_pcm_runtime *runtime = substream->runtime;
 358         int pos = io->byte_pos + additional;
 359
 360         pos %= (runtime->periods * io->byte_per_period);
 361
 362         return pos;
 363 }
 364
 365 void rsnd_dai_pointer_update(struct rsnd_dai_stream *io, int byte)
 366 {
 367         io->byte_pos += byte;
 368
 369         if (io->byte_pos >= io->next_period_byte) {
 370                 struct snd_pcm_substream *substream = io->substream;
 371                 struct snd_pcm_runtime *runtime = substream->runtime;
 372
 373                 io->period_pos++;
 374                 io->next_period_byte += io->byte_per_period;
 375
 376                 if (io->period_pos >= runtime->periods) {
 377                         io->byte_pos = 0;
 378                         io->period_pos = 0;
 379                         io->next_period_byte = io->byte_per_period;
 380                 }
 381
 382                 snd_pcm_period_elapsed(substream);
 383         }
 384 }
 385
 386 static int rsnd_dai_stream_init(struct rsnd_dai_stream *io,
 387                                 struct snd_pcm_substream *substream)
 388 {
 389         struct snd_pcm_runtime *runtime = substream->runtime;
 390
 391         if (!list_empty(&io->head))
 392                 return -EIO;
 393
 394         INIT_LIST_HEAD(&io->head);
 395         io->substream           = substream;
 396         io->byte_pos            = 0;
 397         io->period_pos          = 0;
 398         io->byte_per_period     = runtime->period_size *
 399                                   runtime->channels *
 400                                   samples_to_bytes(runtime, 1);
 401         io->next_period_byte    = io->byte_per_period;
 402
 403         return 0;
 404 }
 405
 406 static
 407 struct snd_soc_dai *rsnd_substream_to_dai(struct snd_pcm_substream *substream)
 408 {
 409         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 410
 411         return  rtd->cpu_dai;
 412 }
 413
 414 static
 415 struct rsnd_dai_stream *rsnd_rdai_to_io(struct rsnd_dai *rdai,
 416                                         struct snd_pcm_substream *substream)
 417 {
 418         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 419                 return &rdai->playback;
 420         else
 421                 return &rdai->capture;
 422 }
 423
 424 static int rsnd_soc_dai_trigger(struct snd_pcm_substream *substream, int cmd,
 425                             struct snd_soc_dai *dai)
 426 {
 427         struct rsnd_priv *priv = snd_soc_dai_get_drvdata(dai);
 428         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
 429         struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream);
 430         struct rsnd_mod *mod = rsnd_ssi_mod_get_frm_dai(priv,
 431                                                 rsnd_dai_id(priv, rdai),
 432                                                 rsnd_dai_is_play(rdai, io));
 433         int ssi_id = rsnd_mod_id(mod);
 434         int ret;
 435         unsigned long flags;
 436
 437         rsnd_lock(priv, flags);
 438
 439         switch (cmd) {
 440         case SNDRV_PCM_TRIGGER_START:
 441                 ret = rsnd_dai_stream_init(io, substream);
 442                 if (ret < 0)
 443                         goto dai_trigger_end;
 444
 445                 ret = rsnd_platform_call(priv, dai, start, ssi_id);
 446                 if (ret < 0)
 447                         goto dai_trigger_end;
 448
 449                 ret = rsnd_gen_path_init(priv, rdai, io);
 450                 if (ret < 0)
 451                         goto dai_trigger_end;
 452
 453                 ret = rsnd_dai_call(rdai, io, init);
 454                 if (ret < 0)
 455                         goto dai_trigger_end;
 456
 457                 ret = rsnd_dai_call(rdai, io, start);
 458                 if (ret < 0)
 459                         goto dai_trigger_end;
 460                 break;
 461         case SNDRV_PCM_TRIGGER_STOP:
 462                 ret = rsnd_dai_call(rdai, io, stop);
 463                 if (ret < 0)
 464                         goto dai_trigger_end;
 465
 466                 ret = rsnd_dai_call(rdai, io, quit);
 467                 if (ret < 0)
 468                         goto dai_trigger_end;
 469
 470                 ret = rsnd_gen_path_exit(priv, rdai, io);
 471                 if (ret < 0)
 472                         goto dai_trigger_end;
 473
 474                 ret = rsnd_platform_call(priv, dai, stop, ssi_id);
 475                 if (ret < 0)
 476                         goto dai_trigger_end;
 477                 break;
 478         default:
 479                 ret = -EINVAL;
 480         }
 481
 482 dai_trigger_end:
 483         rsnd_unlock(priv, flags);
 484
 485         return ret;
 486 }
 487
 488 static int rsnd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
 489 {
 490         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
 491
 492         /* set master/slave audio interface */
 493         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 494         case SND_SOC_DAIFMT_CBM_CFM:
 495                 rdai->clk_master = 1;
 496                 break;
 497         case SND_SOC_DAIFMT_CBS_CFS:
 498                 rdai->clk_master = 0;
 499                 break;
 500         default:
 501                 return -EINVAL;
 502         }
 503
 504         /* set clock inversion */
 505         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
 506         case SND_SOC_DAIFMT_NB_IF:
 507                 rdai->bit_clk_inv = 0;
 508                 rdai->frm_clk_inv = 1;
 509                 break;
 510         case SND_SOC_DAIFMT_IB_NF:
 511                 rdai->bit_clk_inv = 1;
 512                 rdai->frm_clk_inv = 0;
 513                 break;
 514         case SND_SOC_DAIFMT_IB_IF:
 515                 rdai->bit_clk_inv = 1;
 516                 rdai->frm_clk_inv = 1;
 517                 break;
 518         case SND_SOC_DAIFMT_NB_NF:
 519         default:
 520                 rdai->bit_clk_inv = 0;
 521                 rdai->frm_clk_inv = 0;
 522                 break;
 523         }
 524
 525         /* set format */
 526         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 527         case SND_SOC_DAIFMT_I2S:
 528                 rdai->sys_delay = 0;
 529                 rdai->data_alignment = 0;
 530                 break;
 531         case SND_SOC_DAIFMT_LEFT_J:
 532                 rdai->sys_delay = 1;
 533                 rdai->data_alignment = 0;
 534                 break;
 535         case SND_SOC_DAIFMT_RIGHT_J:
 536                 rdai->sys_delay = 1;
 537                 rdai->data_alignment = 1;
 538                 break;
 539         }
 540
 541         return 0;
 542 }
 543
 544 static const struct snd_soc_dai_ops rsnd_soc_dai_ops = {
 545         .trigger        = rsnd_soc_dai_trigger,
 546         .set_fmt        = rsnd_soc_dai_set_fmt,
 547 };
 548
 549 static int rsnd_dai_probe(struct platform_device *pdev,
 550                           struct rcar_snd_info *info,
 551                           struct rsnd_priv *priv)
 552 {
 553         struct snd_soc_dai_driver *drv;
 554         struct rsnd_dai *rdai;
 555         struct rsnd_mod *pmod, *cmod;
 556         struct device *dev = rsnd_priv_to_dev(priv);
 557         int dai_nr;
 558         int i;
 559
 560         /* get max dai nr */
 561         for (dai_nr = 0; dai_nr < 32; dai_nr++) {
 562                 pmod = rsnd_ssi_mod_get_frm_dai(priv, dai_nr, 1);
 563                 cmod = rsnd_ssi_mod_get_frm_dai(priv, dai_nr, 0);
 564
 565                 if (!pmod && !cmod)
 566                         break;
 567         }
 568
 569         if (!dai_nr) {
 570                 dev_err(dev, "no dai\n");
 571                 return -EIO;
 572         }
 573
 574         drv  = devm_kzalloc(dev, sizeof(*drv)  * dai_nr, GFP_KERNEL);
 575         rdai = devm_kzalloc(dev, sizeof(*rdai) * dai_nr, GFP_KERNEL);
 576         if (!drv || !rdai) {
 577                 dev_err(dev, "dai allocate failed\n");
 578                 return -ENOMEM;
 579         }
 580
 581         for (i = 0; i < dai_nr; i++) {
 582
 583                 pmod = rsnd_ssi_mod_get_frm_dai(priv, i, 1);
 584                 cmod = rsnd_ssi_mod_get_frm_dai(priv, i, 0);
 585
 586                 /*
 587                  *      init rsnd_dai
 588                  */
 589                 INIT_LIST_HEAD(&rdai[i].playback.head);
 590                 INIT_LIST_HEAD(&rdai[i].capture.head);
 591
 592                 snprintf(rdai[i].name, RSND_DAI_NAME_SIZE, "rsnd-dai.%d", i);
 593
 594                 /*
 595                  *      init snd_soc_dai_driver
 596                  */
 597                 drv[i].name     = rdai[i].name;
 598                 drv[i].ops      = &rsnd_soc_dai_ops;
 599                 if (pmod) {
 600                         drv[i].playback.rates           = RSND_RATES;
 601                         drv[i].playback.formats         = RSND_FMTS;
 602                         drv[i].playback.channels_min    = 2;
 603                         drv[i].playback.channels_max    = 2;
 604                 }
 605                 if (cmod) {
 606                         drv[i].capture.rates            = RSND_RATES;
 607                         drv[i].capture.formats          = RSND_FMTS;
 608                         drv[i].capture.channels_min     = 2;
 609                         drv[i].capture.channels_max     = 2;
 610                 }
 611
 612                 dev_dbg(dev, "%s (%s/%s)\n", rdai[i].name,
 613                         pmod ? "play"    : " -- ",
 614                         cmod ? "capture" : "  --   ");
 615         }
 616
 617         priv->dai_nr    = dai_nr;
 618         priv->daidrv    = drv;
 619         priv->rdai      = rdai;
 620
 621         return 0;
 622 }
 623
 624 static void rsnd_dai_remove(struct platform_device *pdev,
 625                           struct rsnd_priv *priv)
 626 {
 627 }
 628
 629 /*
 630  *              pcm ops
 631  */
 632 static struct snd_pcm_hardware rsnd_pcm_hardware = {
 633         .info =         SNDRV_PCM_INFO_INTERLEAVED      |
 634                         SNDRV_PCM_INFO_MMAP             |
 635                         SNDRV_PCM_INFO_MMAP_VALID       |
 636                         SNDRV_PCM_INFO_PAUSE,
 637         .buffer_bytes_max       = 64 * 1024,
 638         .period_bytes_min       = 32,
 639         .period_bytes_max       = 8192,
 640         .periods_min            = 1,
 641         .periods_max            = 32,
 642         .fifo_size              = 256,
 643 };
 644
 645 static int rsnd_pcm_open(struct snd_pcm_substream *substream)
 646 {
 647         struct snd_pcm_runtime *runtime = substream->runtime;
 648         int ret = 0;
 649
 650         snd_soc_set_runtime_hwparams(substream, &rsnd_pcm_hardware);
 651
 652         ret = snd_pcm_hw_constraint_integer(runtime,
 653                                             SNDRV_PCM_HW_PARAM_PERIODS);
 654
 655         return ret;
 656 }
 657
 658 static int rsnd_hw_params(struct snd_pcm_substream *substream,
 659                          struct snd_pcm_hw_params *hw_params)
 660 {
 661         return snd_pcm_lib_malloc_pages(substream,
 662                                         params_buffer_bytes(hw_params));
 663 }
 664
 665 static snd_pcm_uframes_t rsnd_pointer(struct snd_pcm_substream *substream)
 666 {
 667         struct snd_pcm_runtime *runtime = substream->runtime;
 668         struct snd_soc_dai *dai = rsnd_substream_to_dai(substream);
 669         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
 670         struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream);
 671
 672         return bytes_to_frames(runtime, io->byte_pos);
 673 }
 674
 675 static struct snd_pcm_ops rsnd_pcm_ops = {
 676         .open           = rsnd_pcm_open,
 677         .ioctl          = snd_pcm_lib_ioctl,
 678         .hw_params      = rsnd_hw_params,
 679         .hw_free        = snd_pcm_lib_free_pages,
 680         .pointer        = rsnd_pointer,
 681 };
 682
 683 /*
 684  *              snd_soc_platform
 685  */
 686
 687 #define PREALLOC_BUFFER         (32 * 1024)
 688 #define PREALLOC_BUFFER_MAX     (32 * 1024)
 689
 690 static int rsnd_pcm_new(struct snd_soc_pcm_runtime *rtd)
 691 {
 692         return snd_pcm_lib_preallocate_pages_for_all(
 693                 rtd->pcm,
 694                 SNDRV_DMA_TYPE_DEV,
 695                 rtd->card->snd_card->dev,
 696                 PREALLOC_BUFFER, PREALLOC_BUFFER_MAX);
 697 }
 698
 699 static void rsnd_pcm_free(struct snd_pcm *pcm)
 700 {
 701         snd_pcm_lib_preallocate_free_for_all(pcm);
 702 }
 703
 704 static struct snd_soc_platform_driver rsnd_soc_platform = {
 705         .ops            = &rsnd_pcm_ops,
 706         .pcm_new        = rsnd_pcm_new,
 707         .pcm_free       = rsnd_pcm_free,
 708 };
 709
 710 static const struct snd_soc_component_driver rsnd_soc_component = {
 711         .name           = "rsnd",
 712 };
 713
 714 /*
 715  *      rsnd probe
 716  */
 717 static int rsnd_probe(struct platform_device *pdev)
 718 {
 719         struct rcar_snd_info *info;
 720         struct rsnd_priv *priv;
 721         struct device *dev = &pdev->dev;
 722         int ret;
 723
 724         info = pdev->dev.platform_data;
 725         if (!info) {
 726                 dev_err(dev, "driver needs R-Car sound information\n");
 727                 return -ENODEV;
 728         }
 729
 730         /*
 731          *      init priv data
 732          */
 733         priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
 734         if (!priv) {
 735                 dev_err(dev, "priv allocate failed\n");
 736                 return -ENODEV;
 737         }
 738
 739         priv->dev       = dev;
 740         priv->info      = info;
 741         spin_lock_init(&priv->lock);
 742
 743         /*
 744          *      init each module
 745          */
 746         ret = rsnd_gen_probe(pdev, info, priv);
 747         if (ret)
 748                 return ret;
 749
 750         ret = rsnd_scu_probe(pdev, info, priv);
 751         if (ret)
 752                 return ret;
 753
 754         ret = rsnd_adg_probe(pdev, info, priv);
 755         if (ret)
 756                 return ret;
 757
 758         ret = rsnd_ssi_probe(pdev, info, priv);
 759         if (ret)
 760                 return ret;
 761
 762         ret = rsnd_dai_probe(pdev, info, priv);
 763         if (ret)
 764                 return ret;
 765
 766         /*
 767          *      asoc register
 768          */
 769         ret = snd_soc_register_platform(dev, &rsnd_soc_platform);
 770         if (ret < 0) {
 771                 dev_err(dev, "cannot snd soc register\n");
 772                 return ret;
 773         }
 774
 775         ret = snd_soc_register_component(dev, &rsnd_soc_component,
 776                                          priv->daidrv, rsnd_dai_nr(priv));
 777         if (ret < 0) {
 778                 dev_err(dev, "cannot snd dai register\n");
 779                 goto exit_snd_soc;
 780         }
 781
 782         dev_set_drvdata(dev, priv);
 783
 784         pm_runtime_enable(dev);
 785
 786         dev_info(dev, "probed\n");
 787         return ret;
 788
 789 exit_snd_soc:
 790         snd_soc_unregister_platform(dev);
 791
 792         return ret;
 793 }
 794
 795 static int rsnd_remove(struct platform_device *pdev)
 796 {
 797         struct rsnd_priv *priv = dev_get_drvdata(&pdev->dev);
 798
 799         pm_runtime_disable(&pdev->dev);
 800
 801         /*
 802          *      remove each module
 803          */
 804         rsnd_ssi_remove(pdev, priv);
 805         rsnd_adg_remove(pdev, priv);
 806         rsnd_scu_remove(pdev, priv);
 807         rsnd_dai_remove(pdev, priv);
 808         rsnd_gen_remove(pdev, priv);
 809
 810         return 0;
 811 }
 812
 813 static struct platform_driver rsnd_driver = {
 814         .driver = {
 815                 .name   = "rcar_sound",
 816         },
 817         .probe          = rsnd_probe,
 818         .remove         = rsnd_remove,
 819 };
 820 module_platform_driver(rsnd_driver);
 821
 822 MODULE_LICENSE("GPL");
 823 MODULE_DESCRIPTION("Renesas R-Car audio driver");
 824 MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");
 825 MODULE_ALIAS("platform:rcar-pcm-audio");