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 src
  77  *   |
  78  *   +- src
  79  *      |
  80  *      +- src[0]
  81  *      +- src[1]
  82  *      +- src[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 static struct rsnd_of_data rsnd_of_data_gen1 = {
 104         .flags = RSND_GEN1,
 105 };
 106
 107 static struct rsnd_of_data rsnd_of_data_gen2 = {
 108         .flags = RSND_GEN2,
 109 };
 110
 111 static struct of_device_id rsnd_of_match[] = {
 112         { .compatible = "renesas,rcar_sound-gen1", .data = &rsnd_of_data_gen1 },
 113         { .compatible = "renesas,rcar_sound-gen2", .data = &rsnd_of_data_gen2 },
 114         {},
 115 };
 116 MODULE_DEVICE_TABLE(of, rsnd_of_match);
 117
 118 /*
 119  *      rsnd_platform functions
 120  */
 121 #define rsnd_platform_call(priv, dai, func, param...)   \
 122         (!(priv->info->func) ? 0 :              \
 123          priv->info->func(param))
 124
 125 #define rsnd_is_enable_path(io, name) \
 126         ((io)->info ? (io)->info->name : NULL)
 127 #define rsnd_info_id(priv, io, name) \
 128         ((io)->info->name - priv->info->name##_info)
 129
 130 /*
 131  *      rsnd_mod functions
 132  */
 133 char *rsnd_mod_name(struct rsnd_mod *mod)
 134 {
 135         if (!mod || !mod->ops)
 136                 return "unknown";
 137
 138         return mod->ops->name;
 139 }
 140
 141 void rsnd_mod_init(struct rsnd_priv *priv,
 142                    struct rsnd_mod *mod,
 143                    struct rsnd_mod_ops *ops,
 144                    enum rsnd_mod_type type,
 145                    int id)
 146 {
 147         mod->priv       = priv;
 148         mod->id         = id;
 149         mod->ops        = ops;
 150         mod->type       = type;
 151 }
 152
 153 /*
 154  *      rsnd_dma functions
 155  */
 156 static void __rsnd_dma_start(struct rsnd_dma *dma);
 157 static void rsnd_dma_continue(struct rsnd_dma *dma)
 158 {
 159         /* push next A or B plane */
 160         dma->submit_loop = 1;
 161         schedule_work(&dma->work);
 162 }
 163
 164 void rsnd_dma_start(struct rsnd_dma *dma)
 165 {
 166         /* push both A and B plane*/
 167         dma->offset = 0;
 168         dma->submit_loop = 2;
 169         __rsnd_dma_start(dma);
 170 }
 171
 172 void rsnd_dma_stop(struct rsnd_dma *dma)
 173 {
 174         dma->submit_loop = 0;
 175         cancel_work_sync(&dma->work);
 176         dmaengine_terminate_all(dma->chan);
 177 }
 178
 179 static void rsnd_dma_complete(void *data)
 180 {
 181         struct rsnd_dma *dma = (struct rsnd_dma *)data;
 182         struct rsnd_mod *mod = rsnd_dma_to_mod(dma);
 183         struct rsnd_priv *priv = rsnd_mod_to_priv(rsnd_dma_to_mod(dma));
 184         struct rsnd_dai_stream *io = rsnd_mod_to_io(mod);
 185         unsigned long flags;
 186
 187         rsnd_lock(priv, flags);
 188
 189         /*
 190          * Renesas sound Gen1 needs 1 DMAC,
 191          * Gen2 needs 2 DMAC.
 192          * In Gen2 case, it are Audio-DMAC, and Audio-DMAC-peri-peri.
 193          * But, Audio-DMAC-peri-peri doesn't have interrupt,
 194          * and this driver is assuming that here.
 195          *
 196          * If Audio-DMAC-peri-peri has interrpt,
 197          * rsnd_dai_pointer_update() will be called twice,
 198          * ant it will breaks io->byte_pos
 199          */
 200         if (dma->submit_loop)
 201                 rsnd_dma_continue(dma);
 202
 203         rsnd_unlock(priv, flags);
 204
 205         rsnd_dai_pointer_update(io, io->byte_per_period);
 206 }
 207
 208 static void __rsnd_dma_start(struct rsnd_dma *dma)
 209 {
 210         struct rsnd_mod *mod = rsnd_dma_to_mod(dma);
 211         struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
 212         struct rsnd_dai_stream *io = rsnd_mod_to_io(mod);
 213         struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
 214         struct device *dev = rsnd_priv_to_dev(priv);
 215         struct dma_async_tx_descriptor *desc;
 216         dma_addr_t buf;
 217         size_t len = io->byte_per_period;
 218         int i;
 219
 220         for (i = 0; i < dma->submit_loop; i++) {
 221
 222                 buf = runtime->dma_addr +
 223                         rsnd_dai_pointer_offset(io, dma->offset + len);
 224                 dma->offset = len;
 225
 226                 desc = dmaengine_prep_slave_single(
 227                         dma->chan, buf, len, dma->dir,
 228                         DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
 229                 if (!desc) {
 230                         dev_err(dev, "dmaengine_prep_slave_sg() fail\n");
 231                         return;
 232                 }
 233
 234                 desc->callback          = rsnd_dma_complete;
 235                 desc->callback_param    = dma;
 236
 237                 if (dmaengine_submit(desc) < 0) {
 238                         dev_err(dev, "dmaengine_submit() fail\n");
 239                         return;
 240                 }
 241
 242                 dma_async_issue_pending(dma->chan);
 243         }
 244 }
 245
 246 static void rsnd_dma_do_work(struct work_struct *work)
 247 {
 248         struct rsnd_dma *dma = container_of(work, struct rsnd_dma, work);
 249
 250         __rsnd_dma_start(dma);
 251 }
 252
 253 int rsnd_dma_available(struct rsnd_dma *dma)
 254 {
 255         return !!dma->chan;
 256 }
 257
 258 int rsnd_dma_init(struct rsnd_priv *priv, struct rsnd_dma *dma,
 259                   int is_play, int id)
 260 {
 261         struct device *dev = rsnd_priv_to_dev(priv);
 262         struct dma_slave_config cfg;
 263         dma_cap_mask_t mask;
 264         int ret;
 265
 266         if (dma->chan) {
 267                 dev_err(dev, "it already has dma channel\n");
 268                 return -EIO;
 269         }
 270
 271         dma_cap_zero(mask);
 272         dma_cap_set(DMA_SLAVE, mask);
 273
 274         dma->chan = dma_request_slave_channel_compat(mask, shdma_chan_filter,
 275                                                      (void *)id, dev,
 276                                                      is_play ? "tx" : "rx");
 277         if (!dma->chan) {
 278                 dev_err(dev, "can't get dma channel\n");
 279                 return -EIO;
 280         }
 281
 282         cfg.slave_id    = id;
 283         cfg.dst_addr    = 0; /* use default addr when playback */
 284         cfg.src_addr    = 0; /* use default addr when capture */
 285         cfg.direction   = is_play ? DMA_MEM_TO_DEV : DMA_DEV_TO_MEM;
 286
 287         ret = dmaengine_slave_config(dma->chan, &cfg);
 288         if (ret < 0)
 289                 goto rsnd_dma_init_err;
 290
 291         dma->dir = is_play ? DMA_TO_DEVICE : DMA_FROM_DEVICE;
 292         INIT_WORK(&dma->work, rsnd_dma_do_work);
 293
 294         return 0;
 295
 296 rsnd_dma_init_err:
 297         rsnd_dma_quit(priv, dma);
 298
 299         return ret;
 300 }
 301
 302 void  rsnd_dma_quit(struct rsnd_priv *priv,
 303                     struct rsnd_dma *dma)
 304 {
 305         if (dma->chan)
 306                 dma_release_channel(dma->chan);
 307
 308         dma->chan = NULL;
 309 }
 310
 311 /*
 312  *      settting function
 313  */
 314 u32 rsnd_get_adinr(struct rsnd_mod *mod)
 315 {
 316         struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
 317         struct rsnd_dai_stream *io = rsnd_mod_to_io(mod);
 318         struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
 319         struct device *dev = rsnd_priv_to_dev(priv);
 320         u32 adinr = runtime->channels;
 321
 322         switch (runtime->sample_bits) {
 323         case 16:
 324                 adinr |= (8 << 16);
 325                 break;
 326         case 32:
 327                 adinr |= (0 << 16);
 328                 break;
 329         default:
 330                 dev_warn(dev, "not supported sample bits\n");
 331                 return 0;
 332         }
 333
 334         return adinr;
 335 }
 336
 337 /*
 338  *      rsnd_dai functions
 339  */
 340 #define __rsnd_mod_call(mod, func, rdai)                        \
 341 ({                                                              \
 342         struct rsnd_priv *priv = rsnd_mod_to_priv(mod);         \
 343         struct device *dev = rsnd_priv_to_dev(priv);            \
 344         dev_dbg(dev, "%s [%d] %s\n",                            \
 345                 rsnd_mod_name(mod), rsnd_mod_id(mod), #func);   \
 346         (mod)->ops->func(mod, rdai);                            \
 347 })
 348
 349 #define rsnd_mod_call(mod, func, rdai)  \
 350         (!(mod) ? -ENODEV :                     \
 351          !((mod)->ops->func) ? 0 :              \
 352          __rsnd_mod_call(mod, func, (rdai)))
 353
 354 #define rsnd_dai_call(rdai, io, fn)                             \
 355 ({                                                              \
 356         struct rsnd_mod *mod;                                   \
 357         int ret = 0, i;                                         \
 358         for (i = 0; i < RSND_MOD_MAX; i++) {                    \
 359                 mod = (io)->mod[i];                             \
 360                 if (!mod)                                       \
 361                         continue;                               \
 362                 ret = rsnd_mod_call(mod, fn, (rdai));           \
 363                 if (ret < 0)                                    \
 364                         break;                                  \
 365         }                                                       \
 366         ret;                                                    \
 367 })
 368
 369 static int rsnd_dai_connect(struct rsnd_mod *mod,
 370                             struct rsnd_dai_stream *io)
 371 {
 372         if (!mod)
 373                 return -EIO;
 374
 375         if (io->mod[mod->type]) {
 376                 struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
 377                 struct device *dev = rsnd_priv_to_dev(priv);
 378
 379                 dev_err(dev, "%s%d is not empty\n",
 380                         rsnd_mod_name(mod),
 381                         rsnd_mod_id(mod));
 382                 return -EIO;
 383         }
 384
 385         io->mod[mod->type] = mod;
 386         mod->io = io;
 387
 388         return 0;
 389 }
 390
 391 int rsnd_dai_id(struct rsnd_priv *priv, struct rsnd_dai *rdai)
 392 {
 393         int id = rdai - priv->rdai;
 394
 395         if ((id < 0) || (id >= rsnd_rdai_nr(priv)))
 396                 return -EINVAL;
 397
 398         return id;
 399 }
 400
 401 struct rsnd_dai *rsnd_dai_get(struct rsnd_priv *priv, int id)
 402 {
 403         if ((id < 0) || (id >= rsnd_rdai_nr(priv)))
 404                 return NULL;
 405
 406         return priv->rdai + id;
 407 }
 408
 409 static struct rsnd_dai *rsnd_dai_to_rdai(struct snd_soc_dai *dai)
 410 {
 411         struct rsnd_priv *priv = snd_soc_dai_get_drvdata(dai);
 412
 413         return rsnd_dai_get(priv, dai->id);
 414 }
 415
 416 int rsnd_dai_is_play(struct rsnd_dai *rdai, struct rsnd_dai_stream *io)
 417 {
 418         return &rdai->playback == io;
 419 }
 420
 421 /*
 422  *      rsnd_soc_dai functions
 423  */
 424 int rsnd_dai_pointer_offset(struct rsnd_dai_stream *io, int additional)
 425 {
 426         struct snd_pcm_substream *substream = io->substream;
 427         struct snd_pcm_runtime *runtime = substream->runtime;
 428         int pos = io->byte_pos + additional;
 429
 430         pos %= (runtime->periods * io->byte_per_period);
 431
 432         return pos;
 433 }
 434
 435 void rsnd_dai_pointer_update(struct rsnd_dai_stream *io, int byte)
 436 {
 437         io->byte_pos += byte;
 438
 439         if (io->byte_pos >= io->next_period_byte) {
 440                 struct snd_pcm_substream *substream = io->substream;
 441                 struct snd_pcm_runtime *runtime = substream->runtime;
 442
 443                 io->period_pos++;
 444                 io->next_period_byte += io->byte_per_period;
 445
 446                 if (io->period_pos >= runtime->periods) {
 447                         io->byte_pos = 0;
 448                         io->period_pos = 0;
 449                         io->next_period_byte = io->byte_per_period;
 450                 }
 451
 452                 snd_pcm_period_elapsed(substream);
 453         }
 454 }
 455
 456 static int rsnd_dai_stream_init(struct rsnd_dai_stream *io,
 457                                 struct snd_pcm_substream *substream)
 458 {
 459         struct snd_pcm_runtime *runtime = substream->runtime;
 460
 461         io->substream           = substream;
 462         io->byte_pos            = 0;
 463         io->period_pos          = 0;
 464         io->byte_per_period     = runtime->period_size *
 465                                   runtime->channels *
 466                                   samples_to_bytes(runtime, 1);
 467         io->next_period_byte    = io->byte_per_period;
 468
 469         return 0;
 470 }
 471
 472 static
 473 struct snd_soc_dai *rsnd_substream_to_dai(struct snd_pcm_substream *substream)
 474 {
 475         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 476
 477         return  rtd->cpu_dai;
 478 }
 479
 480 static
 481 struct rsnd_dai_stream *rsnd_rdai_to_io(struct rsnd_dai *rdai,
 482                                         struct snd_pcm_substream *substream)
 483 {
 484         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 485                 return &rdai->playback;
 486         else
 487                 return &rdai->capture;
 488 }
 489
 490 static int rsnd_soc_dai_trigger(struct snd_pcm_substream *substream, int cmd,
 491                             struct snd_soc_dai *dai)
 492 {
 493         struct rsnd_priv *priv = snd_soc_dai_get_drvdata(dai);
 494         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
 495         struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream);
 496         int ssi_id = rsnd_mod_id(rsnd_io_to_mod_ssi(io));
 497         int ret;
 498         unsigned long flags;
 499
 500         rsnd_lock(priv, flags);
 501
 502         switch (cmd) {
 503         case SNDRV_PCM_TRIGGER_START:
 504                 ret = rsnd_dai_stream_init(io, substream);
 505                 if (ret < 0)
 506                         goto dai_trigger_end;
 507
 508                 ret = rsnd_platform_call(priv, dai, start, ssi_id);
 509                 if (ret < 0)
 510                         goto dai_trigger_end;
 511
 512                 ret = rsnd_dai_call(rdai, io, init);
 513                 if (ret < 0)
 514                         goto dai_trigger_end;
 515
 516                 ret = rsnd_dai_call(rdai, io, start);
 517                 if (ret < 0)
 518                         goto dai_trigger_end;
 519                 break;
 520         case SNDRV_PCM_TRIGGER_STOP:
 521                 ret = rsnd_dai_call(rdai, io, stop);
 522                 if (ret < 0)
 523                         goto dai_trigger_end;
 524
 525                 ret = rsnd_dai_call(rdai, io, quit);
 526                 if (ret < 0)
 527                         goto dai_trigger_end;
 528
 529                 ret = rsnd_platform_call(priv, dai, stop, ssi_id);
 530                 if (ret < 0)
 531                         goto dai_trigger_end;
 532                 break;
 533         default:
 534                 ret = -EINVAL;
 535         }
 536
 537 dai_trigger_end:
 538         rsnd_unlock(priv, flags);
 539
 540         return ret;
 541 }
 542
 543 static int rsnd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
 544 {
 545         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
 546
 547         /* set master/slave audio interface */
 548         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 549         case SND_SOC_DAIFMT_CBM_CFM:
 550                 rdai->clk_master = 0;
 551                 break;
 552         case SND_SOC_DAIFMT_CBS_CFS:
 553                 rdai->clk_master = 1; /* codec is slave, cpu is master */
 554                 break;
 555         default:
 556                 return -EINVAL;
 557         }
 558
 559         /* set clock inversion */
 560         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
 561         case SND_SOC_DAIFMT_NB_IF:
 562                 rdai->bit_clk_inv = 0;
 563                 rdai->frm_clk_inv = 1;
 564                 break;
 565         case SND_SOC_DAIFMT_IB_NF:
 566                 rdai->bit_clk_inv = 1;
 567                 rdai->frm_clk_inv = 0;
 568                 break;
 569         case SND_SOC_DAIFMT_IB_IF:
 570                 rdai->bit_clk_inv = 1;
 571                 rdai->frm_clk_inv = 1;
 572                 break;
 573         case SND_SOC_DAIFMT_NB_NF:
 574         default:
 575                 rdai->bit_clk_inv = 0;
 576                 rdai->frm_clk_inv = 0;
 577                 break;
 578         }
 579
 580         /* set format */
 581         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 582         case SND_SOC_DAIFMT_I2S:
 583                 rdai->sys_delay = 0;
 584                 rdai->data_alignment = 0;
 585                 break;
 586         case SND_SOC_DAIFMT_LEFT_J:
 587                 rdai->sys_delay = 1;
 588                 rdai->data_alignment = 0;
 589                 break;
 590         case SND_SOC_DAIFMT_RIGHT_J:
 591                 rdai->sys_delay = 1;
 592                 rdai->data_alignment = 1;
 593                 break;
 594         }
 595
 596         return 0;
 597 }
 598
 599 static const struct snd_soc_dai_ops rsnd_soc_dai_ops = {
 600         .trigger        = rsnd_soc_dai_trigger,
 601         .set_fmt        = rsnd_soc_dai_set_fmt,
 602 };
 603
 604 #define rsnd_path_parse(priv, io, type)                         \
 605 ({                                                              \
 606         struct rsnd_mod *mod;                                   \
 607         int ret = 0;                                            \
 608         int id = -1;                                            \
 609                                                                 \
 610         if (rsnd_is_enable_path(io, type)) {                    \
 611                 id = rsnd_info_id(priv, io, type);              \
 612                 if (id >= 0) {                                  \
 613                         mod = rsnd_##type##_mod_get(priv, id);  \
 614                         ret = rsnd_dai_connect(mod, io);        \
 615                 }                                               \
 616         }                                                       \
 617         ret;                                                    \
 618 })
 619
 620 static int rsnd_path_init(struct rsnd_priv *priv,
 621                           struct rsnd_dai *rdai,
 622                           struct rsnd_dai_stream *io)
 623 {
 624         int ret;
 625
 626         /*
 627          * Gen1 is created by SRU/SSI, and this SRU is base module of
 628          * Gen2's SCU/SSIU/SSI. (Gen2 SCU/SSIU came from SRU)
 629          *
 630          * Easy image is..
 631          *      Gen1 SRU = Gen2 SCU + SSIU + etc
 632          *
 633          * Gen2 SCU path is very flexible, but, Gen1 SRU (SCU parts) is
 634          * using fixed path.
 635          */
 636
 637         /* SRC */
 638         ret = rsnd_path_parse(priv, io, src);
 639         if (ret < 0)
 640                 return ret;
 641
 642         /* SSI */
 643         ret = rsnd_path_parse(priv, io, ssi);
 644         if (ret < 0)
 645                 return ret;
 646
 647         return ret;
 648 }
 649
 650 static void rsnd_of_parse_dai(struct platform_device *pdev,
 651                               const struct rsnd_of_data *of_data,
 652                               struct rsnd_priv *priv)
 653 {
 654         struct device_node *dai_node,   *dai_np;
 655         struct device_node *ssi_node,   *ssi_np;
 656         struct device_node *src_node,   *src_np;
 657         struct device_node *playback, *capture;
 658         struct rsnd_dai_platform_info *dai_info;
 659         struct rcar_snd_info *info = rsnd_priv_to_info(priv);
 660         struct device *dev = &pdev->dev;
 661         int nr, i;
 662         int dai_i, ssi_i, src_i;
 663
 664         if (!of_data)
 665                 return;
 666
 667         dai_node = of_get_child_by_name(dev->of_node, "rcar_sound,dai");
 668         if (!dai_node)
 669                 return;
 670
 671         nr = of_get_child_count(dai_node);
 672         if (!nr)
 673                 return;
 674
 675         dai_info = devm_kzalloc(dev,
 676                                 sizeof(struct rsnd_dai_platform_info) * nr,
 677                                 GFP_KERNEL);
 678         if (!dai_info) {
 679                 dev_err(dev, "dai info allocation error\n");
 680                 return;
 681         }
 682
 683         info->dai_info_nr       = nr;
 684         info->dai_info          = dai_info;
 685
 686         ssi_node = of_get_child_by_name(dev->of_node, "rcar_sound,ssi");
 687         src_node = of_get_child_by_name(dev->of_node, "rcar_sound,src");
 688
 689 #define mod_parse(name)                                                 \
 690 if (name##_node) {                                                      \
 691         struct rsnd_##name##_platform_info *name##_info;                \
 692                                                                         \
 693         name##_i = 0;                                                   \
 694         for_each_child_of_node(name##_node, name##_np) {                \
 695                 name##_info = info->name##_info + name##_i;             \
 696                                                                         \
 697                 if (name##_np == playback)                              \
 698                         dai_info->playback.name = name##_info;          \
 699                 if (name##_np == capture)                               \
 700                         dai_info->capture.name = name##_info;           \
 701                                                                         \
 702                 name##_i++;                                             \
 703         }                                                               \
 704 }
 705
 706         /*
 707          * parse all dai
 708          */
 709         dai_i = 0;
 710         for_each_child_of_node(dai_node, dai_np) {
 711                 dai_info = info->dai_info + dai_i;
 712
 713                 for (i = 0;; i++) {
 714
 715                         playback = of_parse_phandle(dai_np, "playback", i);
 716                         capture  = of_parse_phandle(dai_np, "capture", i);
 717
 718                         if (!playback && !capture)
 719                                 break;
 720
 721                         mod_parse(ssi);
 722                         mod_parse(src);
 723
 724                         if (playback)
 725                                 of_node_put(playback);
 726                         if (capture)
 727                                 of_node_put(capture);
 728                 }
 729
 730                 dai_i++;
 731         }
 732 }
 733
 734 static int rsnd_dai_probe(struct platform_device *pdev,
 735                           const struct rsnd_of_data *of_data,
 736                           struct rsnd_priv *priv)
 737 {
 738         struct snd_soc_dai_driver *drv;
 739         struct rcar_snd_info *info = rsnd_priv_to_info(priv);
 740         struct rsnd_dai *rdai;
 741         struct rsnd_ssi_platform_info *pmod, *cmod;
 742         struct device *dev = rsnd_priv_to_dev(priv);
 743         int dai_nr;
 744         int i;
 745
 746         rsnd_of_parse_dai(pdev, of_data, priv);
 747
 748         dai_nr = info->dai_info_nr;
 749         if (!dai_nr) {
 750                 dev_err(dev, "no dai\n");
 751                 return -EIO;
 752         }
 753
 754         drv  = devm_kzalloc(dev, sizeof(*drv)  * dai_nr, GFP_KERNEL);
 755         rdai = devm_kzalloc(dev, sizeof(*rdai) * dai_nr, GFP_KERNEL);
 756         if (!drv || !rdai) {
 757                 dev_err(dev, "dai allocate failed\n");
 758                 return -ENOMEM;
 759         }
 760
 761         priv->rdai_nr   = dai_nr;
 762         priv->daidrv    = drv;
 763         priv->rdai      = rdai;
 764
 765         for (i = 0; i < dai_nr; i++) {
 766                 rdai[i].info = &info->dai_info[i];
 767
 768                 pmod = rdai[i].info->playback.ssi;
 769                 cmod = rdai[i].info->capture.ssi;
 770
 771                 /*
 772                  *      init rsnd_dai
 773                  */
 774                 snprintf(rdai[i].name, RSND_DAI_NAME_SIZE, "rsnd-dai.%d", i);
 775
 776                 /*
 777                  *      init snd_soc_dai_driver
 778                  */
 779                 drv[i].name     = rdai[i].name;
 780                 drv[i].ops      = &rsnd_soc_dai_ops;
 781                 if (pmod) {
 782                         drv[i].playback.rates           = RSND_RATES;
 783                         drv[i].playback.formats         = RSND_FMTS;
 784                         drv[i].playback.channels_min    = 2;
 785                         drv[i].playback.channels_max    = 2;
 786
 787                         rdai[i].playback.info = &info->dai_info[i].playback;
 788                         rsnd_path_init(priv, &rdai[i], &rdai[i].playback);
 789                 }
 790                 if (cmod) {
 791                         drv[i].capture.rates            = RSND_RATES;
 792                         drv[i].capture.formats          = RSND_FMTS;
 793                         drv[i].capture.channels_min     = 2;
 794                         drv[i].capture.channels_max     = 2;
 795
 796                         rdai[i].capture.info = &info->dai_info[i].capture;
 797                         rsnd_path_init(priv, &rdai[i], &rdai[i].capture);
 798                 }
 799
 800                 dev_dbg(dev, "%s (%s/%s)\n", rdai[i].name,
 801                         pmod ? "play"    : " -- ",
 802                         cmod ? "capture" : "  --   ");
 803         }
 804
 805         return 0;
 806 }
 807
 808 /*
 809  *              pcm ops
 810  */
 811 static struct snd_pcm_hardware rsnd_pcm_hardware = {
 812         .info =         SNDRV_PCM_INFO_INTERLEAVED      |
 813                         SNDRV_PCM_INFO_MMAP             |
 814                         SNDRV_PCM_INFO_MMAP_VALID,
 815         .buffer_bytes_max       = 64 * 1024,
 816         .period_bytes_min       = 32,
 817         .period_bytes_max       = 8192,
 818         .periods_min            = 1,
 819         .periods_max            = 32,
 820         .fifo_size              = 256,
 821 };
 822
 823 static int rsnd_pcm_open(struct snd_pcm_substream *substream)
 824 {
 825         struct snd_pcm_runtime *runtime = substream->runtime;
 826         int ret = 0;
 827
 828         snd_soc_set_runtime_hwparams(substream, &rsnd_pcm_hardware);
 829
 830         ret = snd_pcm_hw_constraint_integer(runtime,
 831                                             SNDRV_PCM_HW_PARAM_PERIODS);
 832
 833         return ret;
 834 }
 835
 836 static int rsnd_hw_params(struct snd_pcm_substream *substream,
 837                          struct snd_pcm_hw_params *hw_params)
 838 {
 839         return snd_pcm_lib_malloc_pages(substream,
 840                                         params_buffer_bytes(hw_params));
 841 }
 842
 843 static snd_pcm_uframes_t rsnd_pointer(struct snd_pcm_substream *substream)
 844 {
 845         struct snd_pcm_runtime *runtime = substream->runtime;
 846         struct snd_soc_dai *dai = rsnd_substream_to_dai(substream);
 847         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
 848         struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream);
 849
 850         return bytes_to_frames(runtime, io->byte_pos);
 851 }
 852
 853 static struct snd_pcm_ops rsnd_pcm_ops = {
 854         .open           = rsnd_pcm_open,
 855         .ioctl          = snd_pcm_lib_ioctl,
 856         .hw_params      = rsnd_hw_params,
 857         .hw_free        = snd_pcm_lib_free_pages,
 858         .pointer        = rsnd_pointer,
 859 };
 860
 861 /*
 862  *              snd_soc_platform
 863  */
 864
 865 #define PREALLOC_BUFFER         (32 * 1024)
 866 #define PREALLOC_BUFFER_MAX     (32 * 1024)
 867
 868 static int rsnd_pcm_new(struct snd_soc_pcm_runtime *rtd)
 869 {
 870         return snd_pcm_lib_preallocate_pages_for_all(
 871                 rtd->pcm,
 872                 SNDRV_DMA_TYPE_DEV,
 873                 rtd->card->snd_card->dev,
 874                 PREALLOC_BUFFER, PREALLOC_BUFFER_MAX);
 875 }
 876
 877 static void rsnd_pcm_free(struct snd_pcm *pcm)
 878 {
 879         snd_pcm_lib_preallocate_free_for_all(pcm);
 880 }
 881
 882 static struct snd_soc_platform_driver rsnd_soc_platform = {
 883         .ops            = &rsnd_pcm_ops,
 884         .pcm_new        = rsnd_pcm_new,
 885         .pcm_free       = rsnd_pcm_free,
 886 };
 887
 888 static const struct snd_soc_component_driver rsnd_soc_component = {
 889         .name           = "rsnd",
 890 };
 891
 892 /*
 893  *      rsnd probe
 894  */
 895 static int rsnd_probe(struct platform_device *pdev)
 896 {
 897         struct rcar_snd_info *info;
 898         struct rsnd_priv *priv;
 899         struct device *dev = &pdev->dev;
 900         struct rsnd_dai *rdai;
 901         const struct of_device_id *of_id = of_match_device(rsnd_of_match, dev);
 902         const struct rsnd_of_data *of_data;
 903         int (*probe_func[])(struct platform_device *pdev,
 904                             const struct rsnd_of_data *of_data,
 905                             struct rsnd_priv *priv) = {
 906                 rsnd_gen_probe,
 907                 rsnd_ssi_probe,
 908                 rsnd_src_probe,
 909                 rsnd_adg_probe,
 910                 rsnd_dai_probe,
 911         };
 912         int ret, i;
 913
 914         info = NULL;
 915         of_data = NULL;
 916         if (of_id) {
 917                 info = devm_kzalloc(&pdev->dev,
 918                                     sizeof(struct rcar_snd_info), GFP_KERNEL);
 919                 of_data = of_id->data;
 920         } else {
 921                 info = pdev->dev.platform_data;
 922         }
 923
 924         if (!info) {
 925                 dev_err(dev, "driver needs R-Car sound information\n");
 926                 return -ENODEV;
 927         }
 928
 929         /*
 930          *      init priv data
 931          */
 932         priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
 933         if (!priv) {
 934                 dev_err(dev, "priv allocate failed\n");
 935                 return -ENODEV;
 936         }
 937
 938         priv->dev       = dev;
 939         priv->info      = info;
 940         spin_lock_init(&priv->lock);
 941
 942         /*
 943          *      init each module
 944          */
 945         for (i = 0; i < ARRAY_SIZE(probe_func); i++) {
 946                 ret = probe_func[i](pdev, of_data, priv);
 947                 if (ret)
 948                         return ret;
 949         }
 950
 951         for_each_rsnd_dai(rdai, priv, i) {
 952                 ret = rsnd_dai_call(rdai, &rdai->playback, probe);
 953                 if (ret)
 954                         return ret;
 955
 956                 ret = rsnd_dai_call(rdai, &rdai->capture, probe);
 957                 if (ret)
 958                         return ret;
 959         }
 960
 961         /*
 962          *      asoc register
 963          */
 964         ret = snd_soc_register_platform(dev, &rsnd_soc_platform);
 965         if (ret < 0) {
 966                 dev_err(dev, "cannot snd soc register\n");
 967                 return ret;
 968         }
 969
 970         ret = snd_soc_register_component(dev, &rsnd_soc_component,
 971                                          priv->daidrv, rsnd_rdai_nr(priv));
 972         if (ret < 0) {
 973                 dev_err(dev, "cannot snd dai register\n");
 974                 goto exit_snd_soc;
 975         }
 976
 977         dev_set_drvdata(dev, priv);
 978
 979         pm_runtime_enable(dev);
 980
 981         dev_info(dev, "probed\n");
 982         return ret;
 983
 984 exit_snd_soc:
 985         snd_soc_unregister_platform(dev);
 986
 987         return ret;
 988 }
 989
 990 static int rsnd_remove(struct platform_device *pdev)
 991 {
 992         struct rsnd_priv *priv = dev_get_drvdata(&pdev->dev);
 993         struct rsnd_dai *rdai;
 994         int ret, i;
 995
 996         pm_runtime_disable(&pdev->dev);
 997
 998         for_each_rsnd_dai(rdai, priv, i) {
 999                 ret = rsnd_dai_call(rdai, &rdai->playback, remove);
1000                 if (ret)
1001                         return ret;
1002
1003                 ret = rsnd_dai_call(rdai, &rdai->capture, remove);
1004                 if (ret)
1005                         return ret;
1006         }
1007
1008         return 0;
1009 }
1010
1011 static struct platform_driver rsnd_driver = {
1012         .driver = {
1013                 .name   = "rcar_sound",
1014                 .of_match_table = rsnd_of_match,
1015         },
1016         .probe          = rsnd_probe,
1017         .remove         = rsnd_remove,
1018 };
1019 module_platform_driver(rsnd_driver);
1020
1021 MODULE_LICENSE("GPL");
1022 MODULE_DESCRIPTION("Renesas R-Car audio driver");
1023 MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");
1024 MODULE_ALIAS("platform:rcar-pcm-audio");