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                    enum rsnd_mod_type type,
 125                    int id)
 126 {
 127         mod->priv       = priv;
 128         mod->id         = id;
 129         mod->ops        = ops;
 130         mod->type       = type;
 131 }
 132
 133 /*
 134  *      rsnd_dma functions
 135  */
 136 static void __rsnd_dma_start(struct rsnd_dma *dma);
 137 static void rsnd_dma_continue(struct rsnd_dma *dma)
 138 {
 139         /* push next A or B plane */
 140         dma->submit_loop = 1;
 141         schedule_work(&dma->work);
 142 }
 143
 144 void rsnd_dma_start(struct rsnd_dma *dma)
 145 {
 146         /* push both A and B plane*/
 147         dma->offset = 0;
 148         dma->submit_loop = 2;
 149         __rsnd_dma_start(dma);
 150 }
 151
 152 void rsnd_dma_stop(struct rsnd_dma *dma)
 153 {
 154         dma->submit_loop = 0;
 155         cancel_work_sync(&dma->work);
 156         dmaengine_terminate_all(dma->chan);
 157 }
 158
 159 static void rsnd_dma_complete(void *data)
 160 {
 161         struct rsnd_dma *dma = (struct rsnd_dma *)data;
 162         struct rsnd_mod *mod = rsnd_dma_to_mod(dma);
 163         struct rsnd_priv *priv = rsnd_mod_to_priv(rsnd_dma_to_mod(dma));
 164         struct rsnd_dai_stream *io = rsnd_mod_to_io(mod);
 165         unsigned long flags;
 166
 167         rsnd_lock(priv, flags);
 168
 169         /*
 170          * Renesas sound Gen1 needs 1 DMAC,
 171          * Gen2 needs 2 DMAC.
 172          * In Gen2 case, it are Audio-DMAC, and Audio-DMAC-peri-peri.
 173          * But, Audio-DMAC-peri-peri doesn't have interrupt,
 174          * and this driver is assuming that here.
 175          *
 176          * If Audio-DMAC-peri-peri has interrpt,
 177          * rsnd_dai_pointer_update() will be called twice,
 178          * ant it will breaks io->byte_pos
 179          */
 180
 181         rsnd_dai_pointer_update(io, io->byte_per_period);
 182
 183         if (dma->submit_loop)
 184                 rsnd_dma_continue(dma);
 185
 186         rsnd_unlock(priv, flags);
 187 }
 188
 189 static void __rsnd_dma_start(struct rsnd_dma *dma)
 190 {
 191         struct rsnd_mod *mod = rsnd_dma_to_mod(dma);
 192         struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
 193         struct rsnd_dai_stream *io = rsnd_mod_to_io(mod);
 194         struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
 195         struct device *dev = rsnd_priv_to_dev(priv);
 196         struct dma_async_tx_descriptor *desc;
 197         dma_addr_t buf;
 198         size_t len = io->byte_per_period;
 199         int i;
 200
 201         for (i = 0; i < dma->submit_loop; i++) {
 202
 203                 buf = runtime->dma_addr +
 204                         rsnd_dai_pointer_offset(io, dma->offset + len);
 205                 dma->offset = len;
 206
 207                 desc = dmaengine_prep_slave_single(
 208                         dma->chan, buf, len, dma->dir,
 209                         DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
 210                 if (!desc) {
 211                         dev_err(dev, "dmaengine_prep_slave_sg() fail\n");
 212                         return;
 213                 }
 214
 215                 desc->callback          = rsnd_dma_complete;
 216                 desc->callback_param    = dma;
 217
 218                 if (dmaengine_submit(desc) < 0) {
 219                         dev_err(dev, "dmaengine_submit() fail\n");
 220                         return;
 221                 }
 222
 223                 dma_async_issue_pending(dma->chan);
 224         }
 225 }
 226
 227 static void rsnd_dma_do_work(struct work_struct *work)
 228 {
 229         struct rsnd_dma *dma = container_of(work, struct rsnd_dma, work);
 230
 231         __rsnd_dma_start(dma);
 232 }
 233
 234 int rsnd_dma_available(struct rsnd_dma *dma)
 235 {
 236         return !!dma->chan;
 237 }
 238
 239 int rsnd_dma_init(struct rsnd_priv *priv, struct rsnd_dma *dma,
 240                   int is_play, int id)
 241 {
 242         struct device *dev = rsnd_priv_to_dev(priv);
 243         struct dma_slave_config cfg;
 244         dma_cap_mask_t mask;
 245         int ret;
 246
 247         if (dma->chan) {
 248                 dev_err(dev, "it already has dma channel\n");
 249                 return -EIO;
 250         }
 251
 252         dma_cap_zero(mask);
 253         dma_cap_set(DMA_SLAVE, mask);
 254
 255         dma->chan = dma_request_slave_channel_compat(mask, shdma_chan_filter,
 256                                                      (void *)id, dev,
 257                                                      is_play ? "tx" : "rx");
 258         if (!dma->chan) {
 259                 dev_err(dev, "can't get dma channel\n");
 260                 return -EIO;
 261         }
 262
 263         cfg.slave_id    = id;
 264         cfg.dst_addr    = 0; /* use default addr when playback */
 265         cfg.src_addr    = 0; /* use default addr when capture */
 266         cfg.direction   = is_play ? DMA_MEM_TO_DEV : DMA_DEV_TO_MEM;
 267
 268         ret = dmaengine_slave_config(dma->chan, &cfg);
 269         if (ret < 0)
 270                 goto rsnd_dma_init_err;
 271
 272         dma->dir = is_play ? DMA_TO_DEVICE : DMA_FROM_DEVICE;
 273         INIT_WORK(&dma->work, rsnd_dma_do_work);
 274
 275         return 0;
 276
 277 rsnd_dma_init_err:
 278         rsnd_dma_quit(priv, dma);
 279
 280         return ret;
 281 }
 282
 283 void  rsnd_dma_quit(struct rsnd_priv *priv,
 284                     struct rsnd_dma *dma)
 285 {
 286         if (dma->chan)
 287                 dma_release_channel(dma->chan);
 288
 289         dma->chan = NULL;
 290 }
 291
 292 /*
 293  *      rsnd_dai functions
 294  */
 295 #define __rsnd_mod_call(mod, func, rdai, io)                    \
 296 ({                                                              \
 297         struct rsnd_priv *priv = rsnd_mod_to_priv(mod);         \
 298         struct device *dev = rsnd_priv_to_dev(priv);            \
 299         dev_dbg(dev, "%s [%d] %s\n",                            \
 300                 rsnd_mod_name(mod), rsnd_mod_id(mod), #func);   \
 301         (mod)->ops->func(mod, rdai, io);                        \
 302 })
 303
 304 #define rsnd_mod_call(mod, func, rdai, io)      \
 305         (!(mod) ? -ENODEV :                     \
 306          !((mod)->ops->func) ? 0 :              \
 307          __rsnd_mod_call(mod, func, (rdai), (io)))
 308
 309 #define rsnd_dai_call(rdai, io, fn)                             \
 310 ({                                                              \
 311         struct rsnd_mod *mod;                                   \
 312         int ret = 0, i;                                         \
 313         for (i = 0; i < RSND_MOD_MAX; i++) {                    \
 314                 mod = (io)->mod[i];                             \
 315                 if (!mod)                                       \
 316                         continue;                               \
 317                 ret = rsnd_mod_call(mod, fn, (rdai), (io));     \
 318                 if (ret < 0)                                    \
 319                         break;                                  \
 320         }                                                       \
 321         ret;                                                    \
 322 })
 323
 324 static int rsnd_dai_connect(struct rsnd_mod *mod,
 325                             struct rsnd_dai_stream *io)
 326 {
 327         if (!mod)
 328                 return -EIO;
 329
 330         if (io->mod[mod->type]) {
 331                 struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
 332                 struct device *dev = rsnd_priv_to_dev(priv);
 333
 334                 dev_err(dev, "%s%d is not empty\n",
 335                         rsnd_mod_name(mod),
 336                         rsnd_mod_id(mod));
 337                 return -EIO;
 338         }
 339
 340         io->mod[mod->type] = mod;
 341         mod->io = io;
 342
 343         return 0;
 344 }
 345
 346 static int rsnd_dai_disconnect(struct rsnd_mod *mod, struct rsnd_dai_stream *io)
 347 {
 348         io->mod[mod->type] = NULL;
 349         mod->io = NULL;
 350
 351         return 0;
 352 }
 353
 354 int rsnd_dai_id(struct rsnd_priv *priv, struct rsnd_dai *rdai)
 355 {
 356         int id = rdai - priv->rdai;
 357
 358         if ((id < 0) || (id >= rsnd_rdai_nr(priv)))
 359                 return -EINVAL;
 360
 361         return id;
 362 }
 363
 364 struct rsnd_dai *rsnd_dai_get(struct rsnd_priv *priv, int id)
 365 {
 366         if ((id < 0) || (id >= rsnd_rdai_nr(priv)))
 367                 return NULL;
 368
 369         return priv->rdai + id;
 370 }
 371
 372 static struct rsnd_dai *rsnd_dai_to_rdai(struct snd_soc_dai *dai)
 373 {
 374         struct rsnd_priv *priv = snd_soc_dai_get_drvdata(dai);
 375
 376         return rsnd_dai_get(priv, dai->id);
 377 }
 378
 379 int rsnd_dai_is_play(struct rsnd_dai *rdai, struct rsnd_dai_stream *io)
 380 {
 381         return &rdai->playback == io;
 382 }
 383
 384 /*
 385  *      rsnd_soc_dai functions
 386  */
 387 int rsnd_dai_pointer_offset(struct rsnd_dai_stream *io, int additional)
 388 {
 389         struct snd_pcm_substream *substream = io->substream;
 390         struct snd_pcm_runtime *runtime = substream->runtime;
 391         int pos = io->byte_pos + additional;
 392
 393         pos %= (runtime->periods * io->byte_per_period);
 394
 395         return pos;
 396 }
 397
 398 void rsnd_dai_pointer_update(struct rsnd_dai_stream *io, int byte)
 399 {
 400         io->byte_pos += byte;
 401
 402         if (io->byte_pos >= io->next_period_byte) {
 403                 struct snd_pcm_substream *substream = io->substream;
 404                 struct snd_pcm_runtime *runtime = substream->runtime;
 405
 406                 io->period_pos++;
 407                 io->next_period_byte += io->byte_per_period;
 408
 409                 if (io->period_pos >= runtime->periods) {
 410                         io->byte_pos = 0;
 411                         io->period_pos = 0;
 412                         io->next_period_byte = io->byte_per_period;
 413                 }
 414
 415                 snd_pcm_period_elapsed(substream);
 416         }
 417 }
 418
 419 static int rsnd_dai_stream_init(struct rsnd_dai_stream *io,
 420                                 struct snd_pcm_substream *substream)
 421 {
 422         struct snd_pcm_runtime *runtime = substream->runtime;
 423
 424         io->substream           = substream;
 425         io->byte_pos            = 0;
 426         io->period_pos          = 0;
 427         io->byte_per_period     = runtime->period_size *
 428                                   runtime->channels *
 429                                   samples_to_bytes(runtime, 1);
 430         io->next_period_byte    = io->byte_per_period;
 431
 432         return 0;
 433 }
 434
 435 static
 436 struct snd_soc_dai *rsnd_substream_to_dai(struct snd_pcm_substream *substream)
 437 {
 438         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 439
 440         return  rtd->cpu_dai;
 441 }
 442
 443 static
 444 struct rsnd_dai_stream *rsnd_rdai_to_io(struct rsnd_dai *rdai,
 445                                         struct snd_pcm_substream *substream)
 446 {
 447         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 448                 return &rdai->playback;
 449         else
 450                 return &rdai->capture;
 451 }
 452
 453 static int rsnd_soc_dai_trigger(struct snd_pcm_substream *substream, int cmd,
 454                             struct snd_soc_dai *dai)
 455 {
 456         struct rsnd_priv *priv = snd_soc_dai_get_drvdata(dai);
 457         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
 458         struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream);
 459         struct rsnd_mod *mod = rsnd_ssi_mod_get_frm_dai(priv,
 460                                                 rsnd_dai_id(priv, rdai),
 461                                                 rsnd_dai_is_play(rdai, io));
 462         int ssi_id = rsnd_mod_id(mod);
 463         int ret;
 464         unsigned long flags;
 465
 466         rsnd_lock(priv, flags);
 467
 468         switch (cmd) {
 469         case SNDRV_PCM_TRIGGER_START:
 470                 ret = rsnd_dai_stream_init(io, substream);
 471                 if (ret < 0)
 472                         goto dai_trigger_end;
 473
 474                 ret = rsnd_platform_call(priv, dai, start, ssi_id);
 475                 if (ret < 0)
 476                         goto dai_trigger_end;
 477
 478                 ret = rsnd_dai_call(rdai, io, init);
 479                 if (ret < 0)
 480                         goto dai_trigger_end;
 481
 482                 ret = rsnd_dai_call(rdai, io, start);
 483                 if (ret < 0)
 484                         goto dai_trigger_end;
 485                 break;
 486         case SNDRV_PCM_TRIGGER_STOP:
 487                 ret = rsnd_dai_call(rdai, io, stop);
 488                 if (ret < 0)
 489                         goto dai_trigger_end;
 490
 491                 ret = rsnd_dai_call(rdai, io, quit);
 492                 if (ret < 0)
 493                         goto dai_trigger_end;
 494
 495                 ret = rsnd_platform_call(priv, dai, stop, ssi_id);
 496                 if (ret < 0)
 497                         goto dai_trigger_end;
 498                 break;
 499         default:
 500                 ret = -EINVAL;
 501         }
 502
 503 dai_trigger_end:
 504         rsnd_unlock(priv, flags);
 505
 506         return ret;
 507 }
 508
 509 static int rsnd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
 510 {
 511         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
 512
 513         /* set master/slave audio interface */
 514         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 515         case SND_SOC_DAIFMT_CBM_CFM:
 516                 rdai->clk_master = 1;
 517                 break;
 518         case SND_SOC_DAIFMT_CBS_CFS:
 519                 rdai->clk_master = 0;
 520                 break;
 521         default:
 522                 return -EINVAL;
 523         }
 524
 525         /* set clock inversion */
 526         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
 527         case SND_SOC_DAIFMT_NB_IF:
 528                 rdai->bit_clk_inv = 0;
 529                 rdai->frm_clk_inv = 1;
 530                 break;
 531         case SND_SOC_DAIFMT_IB_NF:
 532                 rdai->bit_clk_inv = 1;
 533                 rdai->frm_clk_inv = 0;
 534                 break;
 535         case SND_SOC_DAIFMT_IB_IF:
 536                 rdai->bit_clk_inv = 1;
 537                 rdai->frm_clk_inv = 1;
 538                 break;
 539         case SND_SOC_DAIFMT_NB_NF:
 540         default:
 541                 rdai->bit_clk_inv = 0;
 542                 rdai->frm_clk_inv = 0;
 543                 break;
 544         }
 545
 546         /* set format */
 547         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 548         case SND_SOC_DAIFMT_I2S:
 549                 rdai->sys_delay = 0;
 550                 rdai->data_alignment = 0;
 551                 break;
 552         case SND_SOC_DAIFMT_LEFT_J:
 553                 rdai->sys_delay = 1;
 554                 rdai->data_alignment = 0;
 555                 break;
 556         case SND_SOC_DAIFMT_RIGHT_J:
 557                 rdai->sys_delay = 1;
 558                 rdai->data_alignment = 1;
 559                 break;
 560         }
 561
 562         return 0;
 563 }
 564
 565 static const struct snd_soc_dai_ops rsnd_soc_dai_ops = {
 566         .trigger        = rsnd_soc_dai_trigger,
 567         .set_fmt        = rsnd_soc_dai_set_fmt,
 568 };
 569
 570 static int rsnd_path_init(struct rsnd_priv *priv,
 571                           struct rsnd_dai *rdai,
 572                           struct rsnd_dai_stream *io)
 573 {
 574         struct rsnd_mod *mod;
 575         int ret;
 576         int id;
 577
 578         /*
 579          * Gen1 is created by SRU/SSI, and this SRU is base module of
 580          * Gen2's SCU/SSIU/SSI. (Gen2 SCU/SSIU came from SRU)
 581          *
 582          * Easy image is..
 583          *      Gen1 SRU = Gen2 SCU + SSIU + etc
 584          *
 585          * Gen2 SCU path is very flexible, but, Gen1 SRU (SCU parts) is
 586          * using fixed path.
 587          *
 588          * Then, SSI id = SCU id here
 589          */
 590         /* get SSI's ID */
 591         mod = rsnd_ssi_mod_get_frm_dai(priv,
 592                                        rsnd_dai_id(priv, rdai),
 593                                        rsnd_dai_is_play(rdai, io));
 594         if (!mod)
 595                 return 0;
 596         id = rsnd_mod_id(mod);
 597         ret = 0;
 598
 599         /* SCU */
 600         mod = rsnd_scu_mod_get(priv, id);
 601         if (mod) {
 602                 ret = rsnd_dai_connect(mod, io);
 603                 if (ret < 0)
 604                         return ret;
 605         }
 606
 607         /* SSI */
 608         mod = rsnd_ssi_mod_get(priv, id);
 609         if (mod) {
 610                 ret = rsnd_dai_connect(mod, io);
 611                 if (ret < 0)
 612                         return ret;
 613         }
 614
 615         return ret;
 616 }
 617
 618 static int rsnd_path_exit(struct rsnd_priv *priv,
 619                           struct rsnd_dai *rdai,
 620                           struct rsnd_dai_stream *io)
 621 {
 622         struct rsnd_mod *mod;
 623         int ret = 0, i;
 624
 625         /*
 626          * remove all mod from rdai
 627          */
 628         for (i = 0; i < RSND_MOD_MAX; i++) {
 629                 mod = io->mod[i];
 630                 if (!mod)
 631                         continue;
 632                 ret |= rsnd_dai_disconnect(mod, io);
 633         }
 634
 635         return ret;
 636 }
 637
 638 static int rsnd_dai_probe(struct platform_device *pdev,
 639                           struct rsnd_priv *priv)
 640 {
 641         struct snd_soc_dai_driver *drv;
 642         struct rcar_snd_info *info = rsnd_priv_to_info(priv);
 643         struct rsnd_dai *rdai;
 644         struct rsnd_mod *pmod, *cmod;
 645         struct device *dev = rsnd_priv_to_dev(priv);
 646         int dai_nr = info->dai_info_nr;
 647         int i;
 648
 649         /*
 650          * dai_nr should be set via dai_info_nr,
 651          * but allow it to keeping compatible
 652          */
 653         if (!dai_nr) {
 654                 /* get max dai nr */
 655                 for (dai_nr = 0; dai_nr < 32; dai_nr++) {
 656                         pmod = rsnd_ssi_mod_get_frm_dai(priv, dai_nr, 1);
 657                         cmod = rsnd_ssi_mod_get_frm_dai(priv, dai_nr, 0);
 658
 659                         if (!pmod && !cmod)
 660                                 break;
 661                 }
 662         }
 663
 664         if (!dai_nr) {
 665                 dev_err(dev, "no dai\n");
 666                 return -EIO;
 667         }
 668
 669         drv  = devm_kzalloc(dev, sizeof(*drv)  * dai_nr, GFP_KERNEL);
 670         rdai = devm_kzalloc(dev, sizeof(*rdai) * dai_nr, GFP_KERNEL);
 671         if (!drv || !rdai) {
 672                 dev_err(dev, "dai allocate failed\n");
 673                 return -ENOMEM;
 674         }
 675
 676         priv->rdai_nr   = dai_nr;
 677         priv->daidrv    = drv;
 678         priv->rdai      = rdai;
 679
 680         for (i = 0; i < dai_nr; i++) {
 681                 if (info->dai_info)
 682                         rdai[i].info = &info->dai_info[i];
 683
 684                 pmod = rsnd_ssi_mod_get_frm_dai(priv, i, 1);
 685                 cmod = rsnd_ssi_mod_get_frm_dai(priv, i, 0);
 686
 687                 /*
 688                  *      init rsnd_dai
 689                  */
 690                 snprintf(rdai[i].name, RSND_DAI_NAME_SIZE, "rsnd-dai.%d", i);
 691
 692                 /*
 693                  *      init snd_soc_dai_driver
 694                  */
 695                 drv[i].name     = rdai[i].name;
 696                 drv[i].ops      = &rsnd_soc_dai_ops;
 697                 if (pmod) {
 698                         drv[i].playback.rates           = RSND_RATES;
 699                         drv[i].playback.formats         = RSND_FMTS;
 700                         drv[i].playback.channels_min    = 2;
 701                         drv[i].playback.channels_max    = 2;
 702                         rsnd_path_init(priv, &rdai[i], &rdai[i].playback);
 703                 }
 704                 if (cmod) {
 705                         drv[i].capture.rates            = RSND_RATES;
 706                         drv[i].capture.formats          = RSND_FMTS;
 707                         drv[i].capture.channels_min     = 2;
 708                         drv[i].capture.channels_max     = 2;
 709                         rsnd_path_init(priv, &rdai[i], &rdai[i].capture);
 710                 }
 711
 712                 dev_dbg(dev, "%s (%s/%s)\n", rdai[i].name,
 713                         pmod ? "play"    : " -- ",
 714                         cmod ? "capture" : "  --   ");
 715         }
 716
 717         return 0;
 718 }
 719
 720 static void rsnd_dai_remove(struct platform_device *pdev,
 721                           struct rsnd_priv *priv)
 722 {
 723         struct rsnd_dai *rdai;
 724         int i;
 725
 726         for (i = 0; i < rsnd_rdai_nr(priv); i++) {
 727                 rdai = rsnd_dai_get(priv, i);
 728                 rsnd_path_exit(priv, rdai, &rdai->playback);
 729                 rsnd_path_exit(priv, rdai, &rdai->capture);
 730         }
 731 }
 732
 733 /*
 734  *              pcm ops
 735  */
 736 static struct snd_pcm_hardware rsnd_pcm_hardware = {
 737         .info =         SNDRV_PCM_INFO_INTERLEAVED      |
 738                         SNDRV_PCM_INFO_MMAP             |
 739                         SNDRV_PCM_INFO_MMAP_VALID       |
 740                         SNDRV_PCM_INFO_PAUSE,
 741         .buffer_bytes_max       = 64 * 1024,
 742         .period_bytes_min       = 32,
 743         .period_bytes_max       = 8192,
 744         .periods_min            = 1,
 745         .periods_max            = 32,
 746         .fifo_size              = 256,
 747 };
 748
 749 static int rsnd_pcm_open(struct snd_pcm_substream *substream)
 750 {
 751         struct snd_pcm_runtime *runtime = substream->runtime;
 752         int ret = 0;
 753
 754         snd_soc_set_runtime_hwparams(substream, &rsnd_pcm_hardware);
 755
 756         ret = snd_pcm_hw_constraint_integer(runtime,
 757                                             SNDRV_PCM_HW_PARAM_PERIODS);
 758
 759         return ret;
 760 }
 761
 762 static int rsnd_hw_params(struct snd_pcm_substream *substream,
 763                          struct snd_pcm_hw_params *hw_params)
 764 {
 765         return snd_pcm_lib_malloc_pages(substream,
 766                                         params_buffer_bytes(hw_params));
 767 }
 768
 769 static snd_pcm_uframes_t rsnd_pointer(struct snd_pcm_substream *substream)
 770 {
 771         struct snd_pcm_runtime *runtime = substream->runtime;
 772         struct snd_soc_dai *dai = rsnd_substream_to_dai(substream);
 773         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
 774         struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream);
 775
 776         return bytes_to_frames(runtime, io->byte_pos);
 777 }
 778
 779 static struct snd_pcm_ops rsnd_pcm_ops = {
 780         .open           = rsnd_pcm_open,
 781         .ioctl          = snd_pcm_lib_ioctl,
 782         .hw_params      = rsnd_hw_params,
 783         .hw_free        = snd_pcm_lib_free_pages,
 784         .pointer        = rsnd_pointer,
 785 };
 786
 787 /*
 788  *              snd_soc_platform
 789  */
 790
 791 #define PREALLOC_BUFFER         (32 * 1024)
 792 #define PREALLOC_BUFFER_MAX     (32 * 1024)
 793
 794 static int rsnd_pcm_new(struct snd_soc_pcm_runtime *rtd)
 795 {
 796         return snd_pcm_lib_preallocate_pages_for_all(
 797                 rtd->pcm,
 798                 SNDRV_DMA_TYPE_DEV,
 799                 rtd->card->snd_card->dev,
 800                 PREALLOC_BUFFER, PREALLOC_BUFFER_MAX);
 801 }
 802
 803 static void rsnd_pcm_free(struct snd_pcm *pcm)
 804 {
 805         snd_pcm_lib_preallocate_free_for_all(pcm);
 806 }
 807
 808 static struct snd_soc_platform_driver rsnd_soc_platform = {
 809         .ops            = &rsnd_pcm_ops,
 810         .pcm_new        = rsnd_pcm_new,
 811         .pcm_free       = rsnd_pcm_free,
 812 };
 813
 814 static const struct snd_soc_component_driver rsnd_soc_component = {
 815         .name           = "rsnd",
 816 };
 817
 818 /*
 819  *      rsnd probe
 820  */
 821 static int rsnd_probe(struct platform_device *pdev)
 822 {
 823         struct rcar_snd_info *info;
 824         struct rsnd_priv *priv;
 825         struct device *dev = &pdev->dev;
 826         int (*probe_func[])(struct platform_device *pdev,
 827                             struct rsnd_priv *priv) = {
 828                 rsnd_gen_probe,
 829                 rsnd_ssi_probe,
 830                 rsnd_scu_probe,
 831                 rsnd_adg_probe,
 832                 rsnd_dai_probe,
 833         };
 834         int ret, i;
 835
 836         info = pdev->dev.platform_data;
 837         if (!info) {
 838                 dev_err(dev, "driver needs R-Car sound information\n");
 839                 return -ENODEV;
 840         }
 841
 842         /*
 843          *      init priv data
 844          */
 845         priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
 846         if (!priv) {
 847                 dev_err(dev, "priv allocate failed\n");
 848                 return -ENODEV;
 849         }
 850
 851         priv->dev       = dev;
 852         priv->info      = info;
 853         spin_lock_init(&priv->lock);
 854
 855         /*
 856          *      init each module
 857          */
 858         for (i = 0; i < ARRAY_SIZE(probe_func); i++) {
 859                 ret = probe_func[i](pdev, priv);
 860                 if (ret)
 861                         return ret;
 862         }
 863
 864         /*
 865          *      asoc register
 866          */
 867         ret = snd_soc_register_platform(dev, &rsnd_soc_platform);
 868         if (ret < 0) {
 869                 dev_err(dev, "cannot snd soc register\n");
 870                 return ret;
 871         }
 872
 873         ret = snd_soc_register_component(dev, &rsnd_soc_component,
 874                                          priv->daidrv, rsnd_rdai_nr(priv));
 875         if (ret < 0) {
 876                 dev_err(dev, "cannot snd dai register\n");
 877                 goto exit_snd_soc;
 878         }
 879
 880         dev_set_drvdata(dev, priv);
 881
 882         pm_runtime_enable(dev);
 883
 884         dev_info(dev, "probed\n");
 885         return ret;
 886
 887 exit_snd_soc:
 888         snd_soc_unregister_platform(dev);
 889
 890         return ret;
 891 }
 892
 893 static int rsnd_remove(struct platform_device *pdev)
 894 {
 895         struct rsnd_priv *priv = dev_get_drvdata(&pdev->dev);
 896
 897         pm_runtime_disable(&pdev->dev);
 898
 899         /*
 900          *      remove each module
 901          */
 902         rsnd_ssi_remove(pdev, priv);
 903         rsnd_adg_remove(pdev, priv);
 904         rsnd_scu_remove(pdev, priv);
 905         rsnd_dai_remove(pdev, priv);
 906         rsnd_gen_remove(pdev, priv);
 907
 908         return 0;
 909 }
 910
 911 static struct platform_driver rsnd_driver = {
 912         .driver = {
 913                 .name   = "rcar_sound",
 914         },
 915         .probe          = rsnd_probe,
 916         .remove         = rsnd_remove,
 917 };
 918 module_platform_driver(rsnd_driver);
 919
 920 MODULE_LICENSE("GPL");
 921 MODULE_DESCRIPTION("Renesas R-Car audio driver");
 922 MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");
 923 MODULE_ALIAS("platform:rcar-pcm-audio");