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->offset = 0;
 147         dma->submit_loop = 2;
 148         __rsnd_dma_start(dma);
 149 }
 150
 151 void rsnd_dma_stop(struct rsnd_dma *dma)
 152 {
 153         dma->submit_loop = 0;
 154         cancel_work_sync(&dma->work);
 155         dmaengine_terminate_all(dma->chan);
 156 }
 157
 158 static void rsnd_dma_complete(void *data)
 159 {
 160         struct rsnd_dma *dma = (struct rsnd_dma *)data;
 161         struct rsnd_mod *mod = rsnd_dma_to_mod(dma);
 162         struct rsnd_priv *priv = rsnd_mod_to_priv(rsnd_dma_to_mod(dma));
 163         struct rsnd_dai_stream *io = rsnd_mod_to_io(mod);
 164         unsigned long flags;
 165
 166         rsnd_lock(priv, flags);
 167
 168         /*
 169          * Renesas sound Gen1 needs 1 DMAC,
 170          * Gen2 needs 2 DMAC.
 171          * In Gen2 case, it are Audio-DMAC, and Audio-DMAC-peri-peri.
 172          * But, Audio-DMAC-peri-peri doesn't have interrupt,
 173          * and this driver is assuming that here.
 174          *
 175          * If Audio-DMAC-peri-peri has interrpt,
 176          * rsnd_dai_pointer_update() will be called twice,
 177          * ant it will breaks io->byte_pos
 178          */
 179
 180         rsnd_dai_pointer_update(io, io->byte_per_period);
 181
 182         if (dma->submit_loop)
 183                 rsnd_dma_continue(dma);
 184
 185         rsnd_unlock(priv, flags);
 186 }
 187
 188 static void __rsnd_dma_start(struct rsnd_dma *dma)
 189 {
 190         struct rsnd_mod *mod = rsnd_dma_to_mod(dma);
 191         struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
 192         struct rsnd_dai_stream *io = rsnd_mod_to_io(mod);
 193         struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
 194         struct device *dev = rsnd_priv_to_dev(priv);
 195         struct dma_async_tx_descriptor *desc;
 196         dma_addr_t buf;
 197         size_t len = io->byte_per_period;
 198         int i;
 199
 200         for (i = 0; i < dma->submit_loop; i++) {
 201
 202                 buf = runtime->dma_addr +
 203                         rsnd_dai_pointer_offset(io, dma->offset + len);
 204                 dma->offset = len;
 205
 206                 desc = dmaengine_prep_slave_single(
 207                         dma->chan, buf, len, dma->dir,
 208                         DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
 209                 if (!desc) {
 210                         dev_err(dev, "dmaengine_prep_slave_sg() fail\n");
 211                         return;
 212                 }
 213
 214                 desc->callback          = rsnd_dma_complete;
 215                 desc->callback_param    = dma;
 216
 217                 if (dmaengine_submit(desc) < 0) {
 218                         dev_err(dev, "dmaengine_submit() fail\n");
 219                         return;
 220                 }
 221
 222                 dma_async_issue_pending(dma->chan);
 223         }
 224 }
 225
 226 static void rsnd_dma_do_work(struct work_struct *work)
 227 {
 228         struct rsnd_dma *dma = container_of(work, struct rsnd_dma, work);
 229
 230         __rsnd_dma_start(dma);
 231 }
 232
 233 int rsnd_dma_available(struct rsnd_dma *dma)
 234 {
 235         return !!dma->chan;
 236 }
 237
 238 int rsnd_dma_init(struct rsnd_priv *priv, struct rsnd_dma *dma,
 239                   int is_play, int id)
 240 {
 241         struct device *dev = rsnd_priv_to_dev(priv);
 242         struct dma_slave_config cfg;
 243         dma_cap_mask_t mask;
 244         int ret;
 245
 246         if (dma->chan) {
 247                 dev_err(dev, "it already has dma channel\n");
 248                 return -EIO;
 249         }
 250
 251         dma_cap_zero(mask);
 252         dma_cap_set(DMA_SLAVE, mask);
 253
 254         dma->chan = dma_request_slave_channel_compat(mask, shdma_chan_filter,
 255                                                      (void *)id, dev,
 256                                                      is_play ? "tx" : "rx");
 257         if (!dma->chan) {
 258                 dev_err(dev, "can't get dma channel\n");
 259                 return -EIO;
 260         }
 261
 262         cfg.slave_id    = id;
 263         cfg.dst_addr    = 0; /* use default addr when playback */
 264         cfg.src_addr    = 0; /* use default addr when capture */
 265         cfg.direction   = is_play ? DMA_MEM_TO_DEV : DMA_DEV_TO_MEM;
 266
 267         ret = dmaengine_slave_config(dma->chan, &cfg);
 268         if (ret < 0)
 269                 goto rsnd_dma_init_err;
 270
 271         dma->dir = is_play ? DMA_TO_DEVICE : DMA_FROM_DEVICE;
 272         INIT_WORK(&dma->work, rsnd_dma_do_work);
 273
 274         return 0;
 275
 276 rsnd_dma_init_err:
 277         rsnd_dma_quit(priv, dma);
 278
 279         return ret;
 280 }
 281
 282 void  rsnd_dma_quit(struct rsnd_priv *priv,
 283                     struct rsnd_dma *dma)
 284 {
 285         if (dma->chan)
 286                 dma_release_channel(dma->chan);
 287
 288         dma->chan = NULL;
 289 }
 290
 291 /*
 292  *      rsnd_dai functions
 293  */
 294 #define __rsnd_mod_call(mod, func, rdai, io)                    \
 295 ({                                                              \
 296         struct rsnd_priv *priv = rsnd_mod_to_priv(mod);         \
 297         struct device *dev = rsnd_priv_to_dev(priv);            \
 298         dev_dbg(dev, "%s [%d] %s\n",                            \
 299                 rsnd_mod_name(mod), rsnd_mod_id(mod), #func);   \
 300         (mod)->ops->func(mod, rdai, io);                        \
 301 })
 302
 303 #define rsnd_mod_call(mod, func, rdai, io)      \
 304         (!(mod) ? -ENODEV :                     \
 305          !((mod)->ops->func) ? 0 :              \
 306          __rsnd_mod_call(mod, func, (rdai), (io)))
 307
 308 #define rsnd_dai_call(rdai, io, fn)                             \
 309 ({                                                              \
 310         struct rsnd_mod *mod, *n;                               \
 311         int ret = 0;                                            \
 312         for_each_rsnd_mod(mod, n, (io)) {                       \
 313                 ret = rsnd_mod_call(mod, fn, (rdai), (io));     \
 314                 if (ret < 0)                                    \
 315                         break;                                  \
 316         }                                                       \
 317         ret;                                                    \
 318 })
 319
 320 int rsnd_dai_connect(struct rsnd_dai *rdai,
 321                      struct rsnd_mod *mod,
 322                      struct rsnd_dai_stream *io)
 323 {
 324         if (!mod)
 325                 return -EIO;
 326
 327         if (!list_empty(&mod->list)) {
 328                 struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
 329                 struct device *dev = rsnd_priv_to_dev(priv);
 330
 331                 dev_err(dev, "%s%d is not empty\n",
 332                         rsnd_mod_name(mod),
 333                         rsnd_mod_id(mod));
 334                 return -EIO;
 335         }
 336
 337         list_add_tail(&mod->list, &io->head);
 338         mod->io = io;
 339
 340         return 0;
 341 }
 342
 343 int rsnd_dai_disconnect(struct rsnd_mod *mod)
 344 {
 345         list_del_init(&mod->list);
 346         mod->io = NULL;
 347
 348         return 0;
 349 }
 350
 351 int rsnd_dai_id(struct rsnd_priv *priv, struct rsnd_dai *rdai)
 352 {
 353         int id = rdai - priv->rdai;
 354
 355         if ((id < 0) || (id >= rsnd_dai_nr(priv)))
 356                 return -EINVAL;
 357
 358         return id;
 359 }
 360
 361 struct rsnd_dai *rsnd_dai_get(struct rsnd_priv *priv, int id)
 362 {
 363         if ((id < 0) || (id >= rsnd_dai_nr(priv)))
 364                 return NULL;
 365
 366         return priv->rdai + id;
 367 }
 368
 369 static struct rsnd_dai *rsnd_dai_to_rdai(struct snd_soc_dai *dai)
 370 {
 371         struct rsnd_priv *priv = snd_soc_dai_get_drvdata(dai);
 372
 373         return rsnd_dai_get(priv, dai->id);
 374 }
 375
 376 int rsnd_dai_is_play(struct rsnd_dai *rdai, struct rsnd_dai_stream *io)
 377 {
 378         return &rdai->playback == io;
 379 }
 380
 381 /*
 382  *      rsnd_soc_dai functions
 383  */
 384 int rsnd_dai_pointer_offset(struct rsnd_dai_stream *io, int additional)
 385 {
 386         struct snd_pcm_substream *substream = io->substream;
 387         struct snd_pcm_runtime *runtime = substream->runtime;
 388         int pos = io->byte_pos + additional;
 389
 390         pos %= (runtime->periods * io->byte_per_period);
 391
 392         return pos;
 393 }
 394
 395 void rsnd_dai_pointer_update(struct rsnd_dai_stream *io, int byte)
 396 {
 397         io->byte_pos += byte;
 398
 399         if (io->byte_pos >= io->next_period_byte) {
 400                 struct snd_pcm_substream *substream = io->substream;
 401                 struct snd_pcm_runtime *runtime = substream->runtime;
 402
 403                 io->period_pos++;
 404                 io->next_period_byte += io->byte_per_period;
 405
 406                 if (io->period_pos >= runtime->periods) {
 407                         io->byte_pos = 0;
 408                         io->period_pos = 0;
 409                         io->next_period_byte = io->byte_per_period;
 410                 }
 411
 412                 snd_pcm_period_elapsed(substream);
 413         }
 414 }
 415
 416 static int rsnd_dai_stream_init(struct rsnd_dai_stream *io,
 417                                 struct snd_pcm_substream *substream)
 418 {
 419         struct snd_pcm_runtime *runtime = substream->runtime;
 420
 421         if (!list_empty(&io->head))
 422                 return -EIO;
 423
 424         INIT_LIST_HEAD(&io->head);
 425         io->substream           = substream;
 426         io->byte_pos            = 0;
 427         io->period_pos          = 0;
 428         io->byte_per_period     = runtime->period_size *
 429                                   runtime->channels *
 430                                   samples_to_bytes(runtime, 1);
 431         io->next_period_byte    = io->byte_per_period;
 432
 433         return 0;
 434 }
 435
 436 static
 437 struct snd_soc_dai *rsnd_substream_to_dai(struct snd_pcm_substream *substream)
 438 {
 439         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 440
 441         return  rtd->cpu_dai;
 442 }
 443
 444 static
 445 struct rsnd_dai_stream *rsnd_rdai_to_io(struct rsnd_dai *rdai,
 446                                         struct snd_pcm_substream *substream)
 447 {
 448         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 449                 return &rdai->playback;
 450         else
 451                 return &rdai->capture;
 452 }
 453
 454 static int rsnd_soc_dai_trigger(struct snd_pcm_substream *substream, int cmd,
 455                             struct snd_soc_dai *dai)
 456 {
 457         struct rsnd_priv *priv = snd_soc_dai_get_drvdata(dai);
 458         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
 459         struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream);
 460         struct rsnd_mod *mod = rsnd_ssi_mod_get_frm_dai(priv,
 461                                                 rsnd_dai_id(priv, rdai),
 462                                                 rsnd_dai_is_play(rdai, io));
 463         int ssi_id = rsnd_mod_id(mod);
 464         int ret;
 465         unsigned long flags;
 466
 467         rsnd_lock(priv, flags);
 468
 469         switch (cmd) {
 470         case SNDRV_PCM_TRIGGER_START:
 471                 ret = rsnd_dai_stream_init(io, substream);
 472                 if (ret < 0)
 473                         goto dai_trigger_end;
 474
 475                 ret = rsnd_platform_call(priv, dai, start, ssi_id);
 476                 if (ret < 0)
 477                         goto dai_trigger_end;
 478
 479                 ret = rsnd_gen_path_init(priv, rdai, io);
 480                 if (ret < 0)
 481                         goto dai_trigger_end;
 482
 483                 ret = rsnd_dai_call(rdai, io, init);
 484                 if (ret < 0)
 485                         goto dai_trigger_end;
 486
 487                 ret = rsnd_dai_call(rdai, io, start);
 488                 if (ret < 0)
 489                         goto dai_trigger_end;
 490                 break;
 491         case SNDRV_PCM_TRIGGER_STOP:
 492                 ret = rsnd_dai_call(rdai, io, stop);
 493                 if (ret < 0)
 494                         goto dai_trigger_end;
 495
 496                 ret = rsnd_dai_call(rdai, io, quit);
 497                 if (ret < 0)
 498                         goto dai_trigger_end;
 499
 500                 ret = rsnd_gen_path_exit(priv, rdai, io);
 501                 if (ret < 0)
 502                         goto dai_trigger_end;
 503
 504                 ret = rsnd_platform_call(priv, dai, stop, ssi_id);
 505                 if (ret < 0)
 506                         goto dai_trigger_end;
 507                 break;
 508         default:
 509                 ret = -EINVAL;
 510         }
 511
 512 dai_trigger_end:
 513         rsnd_unlock(priv, flags);
 514
 515         return ret;
 516 }
 517
 518 static int rsnd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
 519 {
 520         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
 521
 522         /* set master/slave audio interface */
 523         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 524         case SND_SOC_DAIFMT_CBM_CFM:
 525                 rdai->clk_master = 1;
 526                 break;
 527         case SND_SOC_DAIFMT_CBS_CFS:
 528                 rdai->clk_master = 0;
 529                 break;
 530         default:
 531                 return -EINVAL;
 532         }
 533
 534         /* set clock inversion */
 535         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
 536         case SND_SOC_DAIFMT_NB_IF:
 537                 rdai->bit_clk_inv = 0;
 538                 rdai->frm_clk_inv = 1;
 539                 break;
 540         case SND_SOC_DAIFMT_IB_NF:
 541                 rdai->bit_clk_inv = 1;
 542                 rdai->frm_clk_inv = 0;
 543                 break;
 544         case SND_SOC_DAIFMT_IB_IF:
 545                 rdai->bit_clk_inv = 1;
 546                 rdai->frm_clk_inv = 1;
 547                 break;
 548         case SND_SOC_DAIFMT_NB_NF:
 549         default:
 550                 rdai->bit_clk_inv = 0;
 551                 rdai->frm_clk_inv = 0;
 552                 break;
 553         }
 554
 555         /* set format */
 556         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 557         case SND_SOC_DAIFMT_I2S:
 558                 rdai->sys_delay = 0;
 559                 rdai->data_alignment = 0;
 560                 break;
 561         case SND_SOC_DAIFMT_LEFT_J:
 562                 rdai->sys_delay = 1;
 563                 rdai->data_alignment = 0;
 564                 break;
 565         case SND_SOC_DAIFMT_RIGHT_J:
 566                 rdai->sys_delay = 1;
 567                 rdai->data_alignment = 1;
 568                 break;
 569         }
 570
 571         return 0;
 572 }
 573
 574 static const struct snd_soc_dai_ops rsnd_soc_dai_ops = {
 575         .trigger        = rsnd_soc_dai_trigger,
 576         .set_fmt        = rsnd_soc_dai_set_fmt,
 577 };
 578
 579 static int rsnd_dai_probe(struct platform_device *pdev,
 580                           struct rsnd_priv *priv)
 581 {
 582         struct snd_soc_dai_driver *drv;
 583         struct rsnd_dai *rdai;
 584         struct rsnd_mod *pmod, *cmod;
 585         struct device *dev = rsnd_priv_to_dev(priv);
 586         int dai_nr;
 587         int i;
 588
 589         /* get max dai nr */
 590         for (dai_nr = 0; dai_nr < 32; dai_nr++) {
 591                 pmod = rsnd_ssi_mod_get_frm_dai(priv, dai_nr, 1);
 592                 cmod = rsnd_ssi_mod_get_frm_dai(priv, dai_nr, 0);
 593
 594                 if (!pmod && !cmod)
 595                         break;
 596         }
 597
 598         if (!dai_nr) {
 599                 dev_err(dev, "no dai\n");
 600                 return -EIO;
 601         }
 602
 603         drv  = devm_kzalloc(dev, sizeof(*drv)  * dai_nr, GFP_KERNEL);
 604         rdai = devm_kzalloc(dev, sizeof(*rdai) * dai_nr, GFP_KERNEL);
 605         if (!drv || !rdai) {
 606                 dev_err(dev, "dai allocate failed\n");
 607                 return -ENOMEM;
 608         }
 609
 610         priv->dai_nr    = dai_nr;
 611         priv->daidrv    = drv;
 612         priv->rdai      = rdai;
 613
 614         for (i = 0; i < dai_nr; i++) {
 615
 616                 pmod = rsnd_ssi_mod_get_frm_dai(priv, i, 1);
 617                 cmod = rsnd_ssi_mod_get_frm_dai(priv, i, 0);
 618
 619                 /*
 620                  *      init rsnd_dai
 621                  */
 622                 INIT_LIST_HEAD(&rdai[i].playback.head);
 623                 INIT_LIST_HEAD(&rdai[i].capture.head);
 624
 625                 snprintf(rdai[i].name, RSND_DAI_NAME_SIZE, "rsnd-dai.%d", i);
 626
 627                 /*
 628                  *      init snd_soc_dai_driver
 629                  */
 630                 drv[i].name     = rdai[i].name;
 631                 drv[i].ops      = &rsnd_soc_dai_ops;
 632                 if (pmod) {
 633                         drv[i].playback.rates           = RSND_RATES;
 634                         drv[i].playback.formats         = RSND_FMTS;
 635                         drv[i].playback.channels_min    = 2;
 636                         drv[i].playback.channels_max    = 2;
 637                 }
 638                 if (cmod) {
 639                         drv[i].capture.rates            = RSND_RATES;
 640                         drv[i].capture.formats          = RSND_FMTS;
 641                         drv[i].capture.channels_min     = 2;
 642                         drv[i].capture.channels_max     = 2;
 643                 }
 644
 645                 dev_dbg(dev, "%s (%s/%s)\n", rdai[i].name,
 646                         pmod ? "play"    : " -- ",
 647                         cmod ? "capture" : "  --   ");
 648         }
 649
 650         return 0;
 651 }
 652
 653 static void rsnd_dai_remove(struct platform_device *pdev,
 654                           struct rsnd_priv *priv)
 655 {
 656 }
 657
 658 /*
 659  *              pcm ops
 660  */
 661 static struct snd_pcm_hardware rsnd_pcm_hardware = {
 662         .info =         SNDRV_PCM_INFO_INTERLEAVED      |
 663                         SNDRV_PCM_INFO_MMAP             |
 664                         SNDRV_PCM_INFO_MMAP_VALID       |
 665                         SNDRV_PCM_INFO_PAUSE,
 666         .buffer_bytes_max       = 64 * 1024,
 667         .period_bytes_min       = 32,
 668         .period_bytes_max       = 8192,
 669         .periods_min            = 1,
 670         .periods_max            = 32,
 671         .fifo_size              = 256,
 672 };
 673
 674 static int rsnd_pcm_open(struct snd_pcm_substream *substream)
 675 {
 676         struct snd_pcm_runtime *runtime = substream->runtime;
 677         int ret = 0;
 678
 679         snd_soc_set_runtime_hwparams(substream, &rsnd_pcm_hardware);
 680
 681         ret = snd_pcm_hw_constraint_integer(runtime,
 682                                             SNDRV_PCM_HW_PARAM_PERIODS);
 683
 684         return ret;
 685 }
 686
 687 static int rsnd_hw_params(struct snd_pcm_substream *substream,
 688                          struct snd_pcm_hw_params *hw_params)
 689 {
 690         return snd_pcm_lib_malloc_pages(substream,
 691                                         params_buffer_bytes(hw_params));
 692 }
 693
 694 static snd_pcm_uframes_t rsnd_pointer(struct snd_pcm_substream *substream)
 695 {
 696         struct snd_pcm_runtime *runtime = substream->runtime;
 697         struct snd_soc_dai *dai = rsnd_substream_to_dai(substream);
 698         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
 699         struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream);
 700
 701         return bytes_to_frames(runtime, io->byte_pos);
 702 }
 703
 704 static struct snd_pcm_ops rsnd_pcm_ops = {
 705         .open           = rsnd_pcm_open,
 706         .ioctl          = snd_pcm_lib_ioctl,
 707         .hw_params      = rsnd_hw_params,
 708         .hw_free        = snd_pcm_lib_free_pages,
 709         .pointer        = rsnd_pointer,
 710 };
 711
 712 /*
 713  *              snd_soc_platform
 714  */
 715
 716 #define PREALLOC_BUFFER         (32 * 1024)
 717 #define PREALLOC_BUFFER_MAX     (32 * 1024)
 718
 719 static int rsnd_pcm_new(struct snd_soc_pcm_runtime *rtd)
 720 {
 721         return snd_pcm_lib_preallocate_pages_for_all(
 722                 rtd->pcm,
 723                 SNDRV_DMA_TYPE_DEV,
 724                 rtd->card->snd_card->dev,
 725                 PREALLOC_BUFFER, PREALLOC_BUFFER_MAX);
 726 }
 727
 728 static void rsnd_pcm_free(struct snd_pcm *pcm)
 729 {
 730         snd_pcm_lib_preallocate_free_for_all(pcm);
 731 }
 732
 733 static struct snd_soc_platform_driver rsnd_soc_platform = {
 734         .ops            = &rsnd_pcm_ops,
 735         .pcm_new        = rsnd_pcm_new,
 736         .pcm_free       = rsnd_pcm_free,
 737 };
 738
 739 static const struct snd_soc_component_driver rsnd_soc_component = {
 740         .name           = "rsnd",
 741 };
 742
 743 /*
 744  *      rsnd probe
 745  */
 746 static int rsnd_probe(struct platform_device *pdev)
 747 {
 748         struct rcar_snd_info *info;
 749         struct rsnd_priv *priv;
 750         struct device *dev = &pdev->dev;
 751         int ret;
 752
 753         info = pdev->dev.platform_data;
 754         if (!info) {
 755                 dev_err(dev, "driver needs R-Car sound information\n");
 756                 return -ENODEV;
 757         }
 758
 759         /*
 760          *      init priv data
 761          */
 762         priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
 763         if (!priv) {
 764                 dev_err(dev, "priv allocate failed\n");
 765                 return -ENODEV;
 766         }
 767
 768         priv->dev       = dev;
 769         priv->info      = info;
 770         spin_lock_init(&priv->lock);
 771
 772         /*
 773          *      init each module
 774          */
 775         ret = rsnd_gen_probe(pdev, priv);
 776         if (ret)
 777                 return ret;
 778
 779         ret = rsnd_ssi_probe(pdev, priv);
 780         if (ret)
 781                 return ret;
 782
 783         ret = rsnd_scu_probe(pdev, priv);
 784         if (ret)
 785                 return ret;
 786
 787         ret = rsnd_adg_probe(pdev, priv);
 788         if (ret)
 789                 return ret;
 790
 791         ret = rsnd_dai_probe(pdev, priv);
 792         if (ret)
 793                 return ret;
 794
 795         /*
 796          *      asoc register
 797          */
 798         ret = snd_soc_register_platform(dev, &rsnd_soc_platform);
 799         if (ret < 0) {
 800                 dev_err(dev, "cannot snd soc register\n");
 801                 return ret;
 802         }
 803
 804         ret = snd_soc_register_component(dev, &rsnd_soc_component,
 805                                          priv->daidrv, rsnd_dai_nr(priv));
 806         if (ret < 0) {
 807                 dev_err(dev, "cannot snd dai register\n");
 808                 goto exit_snd_soc;
 809         }
 810
 811         dev_set_drvdata(dev, priv);
 812
 813         pm_runtime_enable(dev);
 814
 815         dev_info(dev, "probed\n");
 816         return ret;
 817
 818 exit_snd_soc:
 819         snd_soc_unregister_platform(dev);
 820
 821         return ret;
 822 }
 823
 824 static int rsnd_remove(struct platform_device *pdev)
 825 {
 826         struct rsnd_priv *priv = dev_get_drvdata(&pdev->dev);
 827
 828         pm_runtime_disable(&pdev->dev);
 829
 830         /*
 831          *      remove each module
 832          */
 833         rsnd_ssi_remove(pdev, priv);
 834         rsnd_adg_remove(pdev, priv);
 835         rsnd_scu_remove(pdev, priv);
 836         rsnd_dai_remove(pdev, priv);
 837         rsnd_gen_remove(pdev, priv);
 838
 839         return 0;
 840 }
 841
 842 static struct platform_driver rsnd_driver = {
 843         .driver = {
 844                 .name   = "rcar_sound",
 845         },
 846         .probe          = rsnd_probe,
 847         .remove         = rsnd_remove,
 848 };
 849 module_platform_driver(rsnd_driver);
 850
 851 MODULE_LICENSE("GPL");
 852 MODULE_DESCRIPTION("Renesas R-Car audio driver");
 853 MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");
 854 MODULE_ALIAS("platform:rcar-pcm-audio");