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 #define rsnd_is_enable_path(io, name) \
 111         ((io)->info ? (io)->info->name : NULL)
 112 #define rsnd_info_id(priv, io, name) \
 113         ((io)->info->name - priv->info->name##_info)
 114
 115 /*
 116  *      rsnd_mod functions
 117  */
 118 char *rsnd_mod_name(struct rsnd_mod *mod)
 119 {
 120         if (!mod || !mod->ops)
 121                 return "unknown";
 122
 123         return mod->ops->name;
 124 }
 125
 126 void rsnd_mod_init(struct rsnd_priv *priv,
 127                    struct rsnd_mod *mod,
 128                    struct rsnd_mod_ops *ops,
 129                    enum rsnd_mod_type type,
 130                    int id)
 131 {
 132         mod->priv       = priv;
 133         mod->id         = id;
 134         mod->ops        = ops;
 135         mod->type       = type;
 136 }
 137
 138 /*
 139  *      rsnd_dma functions
 140  */
 141 static void __rsnd_dma_start(struct rsnd_dma *dma);
 142 static void rsnd_dma_continue(struct rsnd_dma *dma)
 143 {
 144         /* push next A or B plane */
 145         dma->submit_loop = 1;
 146         schedule_work(&dma->work);
 147 }
 148
 149 void rsnd_dma_start(struct rsnd_dma *dma)
 150 {
 151         /* push both A and B plane*/
 152         dma->offset = 0;
 153         dma->submit_loop = 2;
 154         __rsnd_dma_start(dma);
 155 }
 156
 157 void rsnd_dma_stop(struct rsnd_dma *dma)
 158 {
 159         dma->submit_loop = 0;
 160         cancel_work_sync(&dma->work);
 161         dmaengine_terminate_all(dma->chan);
 162 }
 163
 164 static void rsnd_dma_complete(void *data)
 165 {
 166         struct rsnd_dma *dma = (struct rsnd_dma *)data;
 167         struct rsnd_mod *mod = rsnd_dma_to_mod(dma);
 168         struct rsnd_priv *priv = rsnd_mod_to_priv(rsnd_dma_to_mod(dma));
 169         struct rsnd_dai_stream *io = rsnd_mod_to_io(mod);
 170         unsigned long flags;
 171
 172         rsnd_lock(priv, flags);
 173
 174         /*
 175          * Renesas sound Gen1 needs 1 DMAC,
 176          * Gen2 needs 2 DMAC.
 177          * In Gen2 case, it are Audio-DMAC, and Audio-DMAC-peri-peri.
 178          * But, Audio-DMAC-peri-peri doesn't have interrupt,
 179          * and this driver is assuming that here.
 180          *
 181          * If Audio-DMAC-peri-peri has interrpt,
 182          * rsnd_dai_pointer_update() will be called twice,
 183          * ant it will breaks io->byte_pos
 184          */
 185
 186         rsnd_dai_pointer_update(io, io->byte_per_period);
 187
 188         if (dma->submit_loop)
 189                 rsnd_dma_continue(dma);
 190
 191         rsnd_unlock(priv, flags);
 192 }
 193
 194 static void __rsnd_dma_start(struct rsnd_dma *dma)
 195 {
 196         struct rsnd_mod *mod = rsnd_dma_to_mod(dma);
 197         struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
 198         struct rsnd_dai_stream *io = rsnd_mod_to_io(mod);
 199         struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
 200         struct device *dev = rsnd_priv_to_dev(priv);
 201         struct dma_async_tx_descriptor *desc;
 202         dma_addr_t buf;
 203         size_t len = io->byte_per_period;
 204         int i;
 205
 206         for (i = 0; i < dma->submit_loop; i++) {
 207
 208                 buf = runtime->dma_addr +
 209                         rsnd_dai_pointer_offset(io, dma->offset + len);
 210                 dma->offset = len;
 211
 212                 desc = dmaengine_prep_slave_single(
 213                         dma->chan, buf, len, dma->dir,
 214                         DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
 215                 if (!desc) {
 216                         dev_err(dev, "dmaengine_prep_slave_sg() fail\n");
 217                         return;
 218                 }
 219
 220                 desc->callback          = rsnd_dma_complete;
 221                 desc->callback_param    = dma;
 222
 223                 if (dmaengine_submit(desc) < 0) {
 224                         dev_err(dev, "dmaengine_submit() fail\n");
 225                         return;
 226                 }
 227
 228                 dma_async_issue_pending(dma->chan);
 229         }
 230 }
 231
 232 static void rsnd_dma_do_work(struct work_struct *work)
 233 {
 234         struct rsnd_dma *dma = container_of(work, struct rsnd_dma, work);
 235
 236         __rsnd_dma_start(dma);
 237 }
 238
 239 int rsnd_dma_available(struct rsnd_dma *dma)
 240 {
 241         return !!dma->chan;
 242 }
 243
 244 int rsnd_dma_init(struct rsnd_priv *priv, struct rsnd_dma *dma,
 245                   int is_play, int id)
 246 {
 247         struct device *dev = rsnd_priv_to_dev(priv);
 248         struct dma_slave_config cfg;
 249         dma_cap_mask_t mask;
 250         int ret;
 251
 252         if (dma->chan) {
 253                 dev_err(dev, "it already has dma channel\n");
 254                 return -EIO;
 255         }
 256
 257         dma_cap_zero(mask);
 258         dma_cap_set(DMA_SLAVE, mask);
 259
 260         dma->chan = dma_request_slave_channel_compat(mask, shdma_chan_filter,
 261                                                      (void *)id, dev,
 262                                                      is_play ? "tx" : "rx");
 263         if (!dma->chan) {
 264                 dev_err(dev, "can't get dma channel\n");
 265                 return -EIO;
 266         }
 267
 268         cfg.slave_id    = id;
 269         cfg.dst_addr    = 0; /* use default addr when playback */
 270         cfg.src_addr    = 0; /* use default addr when capture */
 271         cfg.direction   = is_play ? DMA_MEM_TO_DEV : DMA_DEV_TO_MEM;
 272
 273         ret = dmaengine_slave_config(dma->chan, &cfg);
 274         if (ret < 0)
 275                 goto rsnd_dma_init_err;
 276
 277         dma->dir = is_play ? DMA_TO_DEVICE : DMA_FROM_DEVICE;
 278         INIT_WORK(&dma->work, rsnd_dma_do_work);
 279
 280         return 0;
 281
 282 rsnd_dma_init_err:
 283         rsnd_dma_quit(priv, dma);
 284
 285         return ret;
 286 }
 287
 288 void  rsnd_dma_quit(struct rsnd_priv *priv,
 289                     struct rsnd_dma *dma)
 290 {
 291         if (dma->chan)
 292                 dma_release_channel(dma->chan);
 293
 294         dma->chan = NULL;
 295 }
 296
 297 /*
 298  *      rsnd_dai functions
 299  */
 300 #define __rsnd_mod_call(mod, func, rdai, io)                    \
 301 ({                                                              \
 302         struct rsnd_priv *priv = rsnd_mod_to_priv(mod);         \
 303         struct device *dev = rsnd_priv_to_dev(priv);            \
 304         dev_dbg(dev, "%s [%d] %s\n",                            \
 305                 rsnd_mod_name(mod), rsnd_mod_id(mod), #func);   \
 306         (mod)->ops->func(mod, rdai, io);                        \
 307 })
 308
 309 #define rsnd_mod_call(mod, func, rdai, io)      \
 310         (!(mod) ? -ENODEV :                     \
 311          !((mod)->ops->func) ? 0 :              \
 312          __rsnd_mod_call(mod, func, (rdai), (io)))
 313
 314 #define rsnd_dai_call(rdai, io, fn)                             \
 315 ({                                                              \
 316         struct rsnd_mod *mod;                                   \
 317         int ret = 0, i;                                         \
 318         for (i = 0; i < RSND_MOD_MAX; i++) {                    \
 319                 mod = (io)->mod[i];                             \
 320                 if (!mod)                                       \
 321                         continue;                               \
 322                 ret = rsnd_mod_call(mod, fn, (rdai), (io));     \
 323                 if (ret < 0)                                    \
 324                         break;                                  \
 325         }                                                       \
 326         ret;                                                    \
 327 })
 328
 329 static int rsnd_dai_connect(struct rsnd_mod *mod,
 330                             struct rsnd_dai_stream *io)
 331 {
 332         if (!mod)
 333                 return -EIO;
 334
 335         if (io->mod[mod->type]) {
 336                 struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
 337                 struct device *dev = rsnd_priv_to_dev(priv);
 338
 339                 dev_err(dev, "%s%d is not empty\n",
 340                         rsnd_mod_name(mod),
 341                         rsnd_mod_id(mod));
 342                 return -EIO;
 343         }
 344
 345         io->mod[mod->type] = mod;
 346         mod->io = io;
 347
 348         return 0;
 349 }
 350
 351 static int rsnd_dai_disconnect(struct rsnd_mod *mod, struct rsnd_dai_stream *io)
 352 {
 353         io->mod[mod->type] = NULL;
 354         mod->io = NULL;
 355
 356         return 0;
 357 }
 358
 359 int rsnd_dai_id(struct rsnd_priv *priv, struct rsnd_dai *rdai)
 360 {
 361         int id = rdai - priv->rdai;
 362
 363         if ((id < 0) || (id >= rsnd_rdai_nr(priv)))
 364                 return -EINVAL;
 365
 366         return id;
 367 }
 368
 369 struct rsnd_dai *rsnd_dai_get(struct rsnd_priv *priv, int id)
 370 {
 371         if ((id < 0) || (id >= rsnd_rdai_nr(priv)))
 372                 return NULL;
 373
 374         return priv->rdai + id;
 375 }
 376
 377 static struct rsnd_dai *rsnd_dai_to_rdai(struct snd_soc_dai *dai)
 378 {
 379         struct rsnd_priv *priv = snd_soc_dai_get_drvdata(dai);
 380
 381         return rsnd_dai_get(priv, dai->id);
 382 }
 383
 384 int rsnd_dai_is_play(struct rsnd_dai *rdai, struct rsnd_dai_stream *io)
 385 {
 386         return &rdai->playback == io;
 387 }
 388
 389 /*
 390  *      rsnd_soc_dai functions
 391  */
 392 int rsnd_dai_pointer_offset(struct rsnd_dai_stream *io, int additional)
 393 {
 394         struct snd_pcm_substream *substream = io->substream;
 395         struct snd_pcm_runtime *runtime = substream->runtime;
 396         int pos = io->byte_pos + additional;
 397
 398         pos %= (runtime->periods * io->byte_per_period);
 399
 400         return pos;
 401 }
 402
 403 void rsnd_dai_pointer_update(struct rsnd_dai_stream *io, int byte)
 404 {
 405         io->byte_pos += byte;
 406
 407         if (io->byte_pos >= io->next_period_byte) {
 408                 struct snd_pcm_substream *substream = io->substream;
 409                 struct snd_pcm_runtime *runtime = substream->runtime;
 410
 411                 io->period_pos++;
 412                 io->next_period_byte += io->byte_per_period;
 413
 414                 if (io->period_pos >= runtime->periods) {
 415                         io->byte_pos = 0;
 416                         io->period_pos = 0;
 417                         io->next_period_byte = io->byte_per_period;
 418                 }
 419
 420                 snd_pcm_period_elapsed(substream);
 421         }
 422 }
 423
 424 static int rsnd_dai_stream_init(struct rsnd_dai_stream *io,
 425                                 struct snd_pcm_substream *substream)
 426 {
 427         struct snd_pcm_runtime *runtime = substream->runtime;
 428
 429         io->substream           = substream;
 430         io->byte_pos            = 0;
 431         io->period_pos          = 0;
 432         io->byte_per_period     = runtime->period_size *
 433                                   runtime->channels *
 434                                   samples_to_bytes(runtime, 1);
 435         io->next_period_byte    = io->byte_per_period;
 436
 437         return 0;
 438 }
 439
 440 static
 441 struct snd_soc_dai *rsnd_substream_to_dai(struct snd_pcm_substream *substream)
 442 {
 443         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 444
 445         return  rtd->cpu_dai;
 446 }
 447
 448 static
 449 struct rsnd_dai_stream *rsnd_rdai_to_io(struct rsnd_dai *rdai,
 450                                         struct snd_pcm_substream *substream)
 451 {
 452         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 453                 return &rdai->playback;
 454         else
 455                 return &rdai->capture;
 456 }
 457
 458 static int rsnd_soc_dai_trigger(struct snd_pcm_substream *substream, int cmd,
 459                             struct snd_soc_dai *dai)
 460 {
 461         struct rsnd_priv *priv = snd_soc_dai_get_drvdata(dai);
 462         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
 463         struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream);
 464         struct rsnd_mod *mod = rsnd_ssi_mod_get_frm_dai(priv,
 465                                                 rsnd_dai_id(priv, rdai),
 466                                                 rsnd_dai_is_play(rdai, io));
 467         int ssi_id = rsnd_mod_id(mod);
 468         int ret;
 469         unsigned long flags;
 470
 471         rsnd_lock(priv, flags);
 472
 473         switch (cmd) {
 474         case SNDRV_PCM_TRIGGER_START:
 475                 ret = rsnd_dai_stream_init(io, substream);
 476                 if (ret < 0)
 477                         goto dai_trigger_end;
 478
 479                 ret = rsnd_platform_call(priv, dai, start, ssi_id);
 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_platform_call(priv, dai, stop, ssi_id);
 501                 if (ret < 0)
 502                         goto dai_trigger_end;
 503                 break;
 504         default:
 505                 ret = -EINVAL;
 506         }
 507
 508 dai_trigger_end:
 509         rsnd_unlock(priv, flags);
 510
 511         return ret;
 512 }
 513
 514 static int rsnd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
 515 {
 516         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
 517
 518         /* set master/slave audio interface */
 519         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 520         case SND_SOC_DAIFMT_CBM_CFM:
 521                 rdai->clk_master = 1;
 522                 break;
 523         case SND_SOC_DAIFMT_CBS_CFS:
 524                 rdai->clk_master = 0;
 525                 break;
 526         default:
 527                 return -EINVAL;
 528         }
 529
 530         /* set clock inversion */
 531         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
 532         case SND_SOC_DAIFMT_NB_IF:
 533                 rdai->bit_clk_inv = 0;
 534                 rdai->frm_clk_inv = 1;
 535                 break;
 536         case SND_SOC_DAIFMT_IB_NF:
 537                 rdai->bit_clk_inv = 1;
 538                 rdai->frm_clk_inv = 0;
 539                 break;
 540         case SND_SOC_DAIFMT_IB_IF:
 541                 rdai->bit_clk_inv = 1;
 542                 rdai->frm_clk_inv = 1;
 543                 break;
 544         case SND_SOC_DAIFMT_NB_NF:
 545         default:
 546                 rdai->bit_clk_inv = 0;
 547                 rdai->frm_clk_inv = 0;
 548                 break;
 549         }
 550
 551         /* set format */
 552         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 553         case SND_SOC_DAIFMT_I2S:
 554                 rdai->sys_delay = 0;
 555                 rdai->data_alignment = 0;
 556                 break;
 557         case SND_SOC_DAIFMT_LEFT_J:
 558                 rdai->sys_delay = 1;
 559                 rdai->data_alignment = 0;
 560                 break;
 561         case SND_SOC_DAIFMT_RIGHT_J:
 562                 rdai->sys_delay = 1;
 563                 rdai->data_alignment = 1;
 564                 break;
 565         }
 566
 567         return 0;
 568 }
 569
 570 static const struct snd_soc_dai_ops rsnd_soc_dai_ops = {
 571         .trigger        = rsnd_soc_dai_trigger,
 572         .set_fmt        = rsnd_soc_dai_set_fmt,
 573 };
 574
 575 static int rsnd_path_init(struct rsnd_priv *priv,
 576                           struct rsnd_dai *rdai,
 577                           struct rsnd_dai_stream *io)
 578 {
 579         struct rsnd_mod *mod;
 580         struct rsnd_dai_platform_info *dai_info = rdai->info;
 581         int ret;
 582         int ssi_id = -1;
 583         int scu_id = -1;
 584
 585         /*
 586          * Gen1 is created by SRU/SSI, and this SRU is base module of
 587          * Gen2's SCU/SSIU/SSI. (Gen2 SCU/SSIU came from SRU)
 588          *
 589          * Easy image is..
 590          *      Gen1 SRU = Gen2 SCU + SSIU + etc
 591          *
 592          * Gen2 SCU path is very flexible, but, Gen1 SRU (SCU parts) is
 593          * using fixed path.
 594          */
 595         if (dai_info) {
 596                 if (rsnd_is_enable_path(io, ssi))
 597                         ssi_id = rsnd_info_id(priv, io, ssi);
 598                 if (rsnd_is_enable_path(io, scu))
 599                         scu_id = rsnd_info_id(priv, io, scu);
 600         } else {
 601                 /* get SSI's ID */
 602                 mod = rsnd_ssi_mod_get_frm_dai(priv,
 603                                                rsnd_dai_id(priv, rdai),
 604                                                rsnd_dai_is_play(rdai, io));
 605                 if (!mod)
 606                         return 0;
 607                 ssi_id = scu_id = rsnd_mod_id(mod);
 608         }
 609
 610         ret = 0;
 611
 612         /* SCU */
 613         if (scu_id >= 0) {
 614                 mod = rsnd_scu_mod_get(priv, scu_id);
 615                 ret = rsnd_dai_connect(mod, io);
 616                 if (ret < 0)
 617                         return ret;
 618         }
 619
 620         /* SSI */
 621         if (ssi_id >= 0) {
 622                 mod = rsnd_ssi_mod_get(priv, ssi_id);
 623                 ret = rsnd_dai_connect(mod, io);
 624                 if (ret < 0)
 625                         return ret;
 626         }
 627
 628         return ret;
 629 }
 630
 631 static int rsnd_path_exit(struct rsnd_priv *priv,
 632                           struct rsnd_dai *rdai,
 633                           struct rsnd_dai_stream *io)
 634 {
 635         struct rsnd_mod *mod;
 636         int ret = 0, i;
 637
 638         /*
 639          * remove all mod from rdai
 640          */
 641         for (i = 0; i < RSND_MOD_MAX; i++) {
 642                 mod = io->mod[i];
 643                 if (!mod)
 644                         continue;
 645                 ret |= rsnd_dai_disconnect(mod, io);
 646         }
 647
 648         return ret;
 649 }
 650
 651 static int rsnd_dai_probe(struct platform_device *pdev,
 652                           struct rsnd_priv *priv)
 653 {
 654         struct snd_soc_dai_driver *drv;
 655         struct rcar_snd_info *info = rsnd_priv_to_info(priv);
 656         struct rsnd_dai *rdai;
 657         struct rsnd_mod *pmod, *cmod;
 658         struct device *dev = rsnd_priv_to_dev(priv);
 659         int dai_nr = info->dai_info_nr;
 660         int i;
 661
 662         /*
 663          * dai_nr should be set via dai_info_nr,
 664          * but allow it to keeping compatible
 665          */
 666         if (!dai_nr) {
 667                 /* get max dai nr */
 668                 for (dai_nr = 0; dai_nr < 32; dai_nr++) {
 669                         pmod = rsnd_ssi_mod_get_frm_dai(priv, dai_nr, 1);
 670                         cmod = rsnd_ssi_mod_get_frm_dai(priv, dai_nr, 0);
 671
 672                         if (!pmod && !cmod)
 673                                 break;
 674                 }
 675         }
 676
 677         if (!dai_nr) {
 678                 dev_err(dev, "no dai\n");
 679                 return -EIO;
 680         }
 681
 682         drv  = devm_kzalloc(dev, sizeof(*drv)  * dai_nr, GFP_KERNEL);
 683         rdai = devm_kzalloc(dev, sizeof(*rdai) * dai_nr, GFP_KERNEL);
 684         if (!drv || !rdai) {
 685                 dev_err(dev, "dai allocate failed\n");
 686                 return -ENOMEM;
 687         }
 688
 689         priv->rdai_nr   = dai_nr;
 690         priv->daidrv    = drv;
 691         priv->rdai      = rdai;
 692
 693         for (i = 0; i < dai_nr; i++) {
 694                 if (info->dai_info)
 695                         rdai[i].info = &info->dai_info[i];
 696
 697                 pmod = rsnd_ssi_mod_get_frm_dai(priv, i, 1);
 698                 cmod = rsnd_ssi_mod_get_frm_dai(priv, i, 0);
 699
 700                 /*
 701                  *      init rsnd_dai
 702                  */
 703                 snprintf(rdai[i].name, RSND_DAI_NAME_SIZE, "rsnd-dai.%d", i);
 704
 705                 /*
 706                  *      init snd_soc_dai_driver
 707                  */
 708                 drv[i].name     = rdai[i].name;
 709                 drv[i].ops      = &rsnd_soc_dai_ops;
 710                 if (pmod) {
 711                         drv[i].playback.rates           = RSND_RATES;
 712                         drv[i].playback.formats         = RSND_FMTS;
 713                         drv[i].playback.channels_min    = 2;
 714                         drv[i].playback.channels_max    = 2;
 715
 716                         if (info->dai_info)
 717                                 rdai[i].playback.info = &info->dai_info[i].playback;
 718                         rsnd_path_init(priv, &rdai[i], &rdai[i].playback);
 719                 }
 720                 if (cmod) {
 721                         drv[i].capture.rates            = RSND_RATES;
 722                         drv[i].capture.formats          = RSND_FMTS;
 723                         drv[i].capture.channels_min     = 2;
 724                         drv[i].capture.channels_max     = 2;
 725
 726                         if (info->dai_info)
 727                                 rdai[i].capture.info = &info->dai_info[i].capture;
 728                         rsnd_path_init(priv, &rdai[i], &rdai[i].capture);
 729                 }
 730
 731                 dev_dbg(dev, "%s (%s/%s)\n", rdai[i].name,
 732                         pmod ? "play"    : " -- ",
 733                         cmod ? "capture" : "  --   ");
 734         }
 735
 736         return 0;
 737 }
 738
 739 static void rsnd_dai_remove(struct platform_device *pdev,
 740                           struct rsnd_priv *priv)
 741 {
 742         struct rsnd_dai *rdai;
 743         int i;
 744
 745         for (i = 0; i < rsnd_rdai_nr(priv); i++) {
 746                 rdai = rsnd_dai_get(priv, i);
 747                 rsnd_path_exit(priv, rdai, &rdai->playback);
 748                 rsnd_path_exit(priv, rdai, &rdai->capture);
 749         }
 750 }
 751
 752 /*
 753  *              pcm ops
 754  */
 755 static struct snd_pcm_hardware rsnd_pcm_hardware = {
 756         .info =         SNDRV_PCM_INFO_INTERLEAVED      |
 757                         SNDRV_PCM_INFO_MMAP             |
 758                         SNDRV_PCM_INFO_MMAP_VALID       |
 759                         SNDRV_PCM_INFO_PAUSE,
 760         .buffer_bytes_max       = 64 * 1024,
 761         .period_bytes_min       = 32,
 762         .period_bytes_max       = 8192,
 763         .periods_min            = 1,
 764         .periods_max            = 32,
 765         .fifo_size              = 256,
 766 };
 767
 768 static int rsnd_pcm_open(struct snd_pcm_substream *substream)
 769 {
 770         struct snd_pcm_runtime *runtime = substream->runtime;
 771         int ret = 0;
 772
 773         snd_soc_set_runtime_hwparams(substream, &rsnd_pcm_hardware);
 774
 775         ret = snd_pcm_hw_constraint_integer(runtime,
 776                                             SNDRV_PCM_HW_PARAM_PERIODS);
 777
 778         return ret;
 779 }
 780
 781 static int rsnd_hw_params(struct snd_pcm_substream *substream,
 782                          struct snd_pcm_hw_params *hw_params)
 783 {
 784         return snd_pcm_lib_malloc_pages(substream,
 785                                         params_buffer_bytes(hw_params));
 786 }
 787
 788 static snd_pcm_uframes_t rsnd_pointer(struct snd_pcm_substream *substream)
 789 {
 790         struct snd_pcm_runtime *runtime = substream->runtime;
 791         struct snd_soc_dai *dai = rsnd_substream_to_dai(substream);
 792         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
 793         struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream);
 794
 795         return bytes_to_frames(runtime, io->byte_pos);
 796 }
 797
 798 static struct snd_pcm_ops rsnd_pcm_ops = {
 799         .open           = rsnd_pcm_open,
 800         .ioctl          = snd_pcm_lib_ioctl,
 801         .hw_params      = rsnd_hw_params,
 802         .hw_free        = snd_pcm_lib_free_pages,
 803         .pointer        = rsnd_pointer,
 804 };
 805
 806 /*
 807  *              snd_soc_platform
 808  */
 809
 810 #define PREALLOC_BUFFER         (32 * 1024)
 811 #define PREALLOC_BUFFER_MAX     (32 * 1024)
 812
 813 static int rsnd_pcm_new(struct snd_soc_pcm_runtime *rtd)
 814 {
 815         return snd_pcm_lib_preallocate_pages_for_all(
 816                 rtd->pcm,
 817                 SNDRV_DMA_TYPE_DEV,
 818                 rtd->card->snd_card->dev,
 819                 PREALLOC_BUFFER, PREALLOC_BUFFER_MAX);
 820 }
 821
 822 static void rsnd_pcm_free(struct snd_pcm *pcm)
 823 {
 824         snd_pcm_lib_preallocate_free_for_all(pcm);
 825 }
 826
 827 static struct snd_soc_platform_driver rsnd_soc_platform = {
 828         .ops            = &rsnd_pcm_ops,
 829         .pcm_new        = rsnd_pcm_new,
 830         .pcm_free       = rsnd_pcm_free,
 831 };
 832
 833 static const struct snd_soc_component_driver rsnd_soc_component = {
 834         .name           = "rsnd",
 835 };
 836
 837 /*
 838  *      rsnd probe
 839  */
 840 static int rsnd_probe(struct platform_device *pdev)
 841 {
 842         struct rcar_snd_info *info;
 843         struct rsnd_priv *priv;
 844         struct device *dev = &pdev->dev;
 845         int (*probe_func[])(struct platform_device *pdev,
 846                             struct rsnd_priv *priv) = {
 847                 rsnd_gen_probe,
 848                 rsnd_ssi_probe,
 849                 rsnd_scu_probe,
 850                 rsnd_adg_probe,
 851                 rsnd_dai_probe,
 852         };
 853         int ret, i;
 854
 855         info = pdev->dev.platform_data;
 856         if (!info) {
 857                 dev_err(dev, "driver needs R-Car sound information\n");
 858                 return -ENODEV;
 859         }
 860
 861         /*
 862          *      init priv data
 863          */
 864         priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
 865         if (!priv) {
 866                 dev_err(dev, "priv allocate failed\n");
 867                 return -ENODEV;
 868         }
 869
 870         priv->dev       = dev;
 871         priv->info      = info;
 872         spin_lock_init(&priv->lock);
 873
 874         /*
 875          *      init each module
 876          */
 877         for (i = 0; i < ARRAY_SIZE(probe_func); i++) {
 878                 ret = probe_func[i](pdev, priv);
 879                 if (ret)
 880                         return ret;
 881         }
 882
 883         /*
 884          *      asoc register
 885          */
 886         ret = snd_soc_register_platform(dev, &rsnd_soc_platform);
 887         if (ret < 0) {
 888                 dev_err(dev, "cannot snd soc register\n");
 889                 return ret;
 890         }
 891
 892         ret = snd_soc_register_component(dev, &rsnd_soc_component,
 893                                          priv->daidrv, rsnd_rdai_nr(priv));
 894         if (ret < 0) {
 895                 dev_err(dev, "cannot snd dai register\n");
 896                 goto exit_snd_soc;
 897         }
 898
 899         dev_set_drvdata(dev, priv);
 900
 901         pm_runtime_enable(dev);
 902
 903         dev_info(dev, "probed\n");
 904         return ret;
 905
 906 exit_snd_soc:
 907         snd_soc_unregister_platform(dev);
 908
 909         return ret;
 910 }
 911
 912 static int rsnd_remove(struct platform_device *pdev)
 913 {
 914         struct rsnd_priv *priv = dev_get_drvdata(&pdev->dev);
 915
 916         pm_runtime_disable(&pdev->dev);
 917
 918         /*
 919          *      remove each module
 920          */
 921         rsnd_ssi_remove(pdev, priv);
 922         rsnd_adg_remove(pdev, priv);
 923         rsnd_scu_remove(pdev, priv);
 924         rsnd_dai_remove(pdev, priv);
 925         rsnd_gen_remove(pdev, priv);
 926
 927         return 0;
 928 }
 929
 930 static struct platform_driver rsnd_driver = {
 931         .driver = {
 932                 .name   = "rcar_sound",
 933         },
 934         .probe          = rsnd_probe,
 935         .remove         = rsnd_remove,
 936 };
 937 module_platform_driver(rsnd_driver);
 938
 939 MODULE_LICENSE("GPL");
 940 MODULE_DESCRIPTION("Renesas R-Car audio driver");
 941 MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");
 942 MODULE_ALIAS("platform:rcar-pcm-audio");