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
 201         rsnd_dai_pointer_update(io, io->byte_per_period);
 202
 203         if (dma->submit_loop)
 204                 rsnd_dma_continue(dma);
 205
 206         rsnd_unlock(priv, flags);
 207 }
 208
 209 static void __rsnd_dma_start(struct rsnd_dma *dma)
 210 {
 211         struct rsnd_mod *mod = rsnd_dma_to_mod(dma);
 212         struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
 213         struct rsnd_dai_stream *io = rsnd_mod_to_io(mod);
 214         struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
 215         struct device *dev = rsnd_priv_to_dev(priv);
 216         struct dma_async_tx_descriptor *desc;
 217         dma_addr_t buf;
 218         size_t len = io->byte_per_period;
 219         int i;
 220
 221         for (i = 0; i < dma->submit_loop; i++) {
 222
 223                 buf = runtime->dma_addr +
 224                         rsnd_dai_pointer_offset(io, dma->offset + len);
 225                 dma->offset = len;
 226
 227                 desc = dmaengine_prep_slave_single(
 228                         dma->chan, buf, len, dma->dir,
 229                         DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
 230                 if (!desc) {
 231                         dev_err(dev, "dmaengine_prep_slave_sg() fail\n");
 232                         return;
 233                 }
 234
 235                 desc->callback          = rsnd_dma_complete;
 236                 desc->callback_param    = dma;
 237
 238                 if (dmaengine_submit(desc) < 0) {
 239                         dev_err(dev, "dmaengine_submit() fail\n");
 240                         return;
 241                 }
 242
 243                 dma_async_issue_pending(dma->chan);
 244         }
 245 }
 246
 247 static void rsnd_dma_do_work(struct work_struct *work)
 248 {
 249         struct rsnd_dma *dma = container_of(work, struct rsnd_dma, work);
 250
 251         __rsnd_dma_start(dma);
 252 }
 253
 254 int rsnd_dma_available(struct rsnd_dma *dma)
 255 {
 256         return !!dma->chan;
 257 }
 258
 259 int rsnd_dma_init(struct rsnd_priv *priv, struct rsnd_dma *dma,
 260                   int is_play, int id)
 261 {
 262         struct device *dev = rsnd_priv_to_dev(priv);
 263         struct dma_slave_config cfg;
 264         dma_cap_mask_t mask;
 265         int ret;
 266
 267         if (dma->chan) {
 268                 dev_err(dev, "it already has dma channel\n");
 269                 return -EIO;
 270         }
 271
 272         dma_cap_zero(mask);
 273         dma_cap_set(DMA_SLAVE, mask);
 274
 275         dma->chan = dma_request_slave_channel_compat(mask, shdma_chan_filter,
 276                                                      (void *)id, dev,
 277                                                      is_play ? "tx" : "rx");
 278         if (!dma->chan) {
 279                 dev_err(dev, "can't get dma channel\n");
 280                 return -EIO;
 281         }
 282
 283         cfg.slave_id    = id;
 284         cfg.dst_addr    = 0; /* use default addr when playback */
 285         cfg.src_addr    = 0; /* use default addr when capture */
 286         cfg.direction   = is_play ? DMA_MEM_TO_DEV : DMA_DEV_TO_MEM;
 287
 288         ret = dmaengine_slave_config(dma->chan, &cfg);
 289         if (ret < 0)
 290                 goto rsnd_dma_init_err;
 291
 292         dma->dir = is_play ? DMA_TO_DEVICE : DMA_FROM_DEVICE;
 293         INIT_WORK(&dma->work, rsnd_dma_do_work);
 294
 295         return 0;
 296
 297 rsnd_dma_init_err:
 298         rsnd_dma_quit(priv, dma);
 299
 300         return ret;
 301 }
 302
 303 void  rsnd_dma_quit(struct rsnd_priv *priv,
 304                     struct rsnd_dma *dma)
 305 {
 306         if (dma->chan)
 307                 dma_release_channel(dma->chan);
 308
 309         dma->chan = NULL;
 310 }
 311
 312 /*
 313  *      settting function
 314  */
 315 u32 rsnd_get_adinr(struct rsnd_mod *mod)
 316 {
 317         struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
 318         struct rsnd_dai_stream *io = rsnd_mod_to_io(mod);
 319         struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
 320         struct device *dev = rsnd_priv_to_dev(priv);
 321         u32 adinr = runtime->channels;
 322
 323         switch (runtime->sample_bits) {
 324         case 16:
 325                 adinr |= (8 << 16);
 326                 break;
 327         case 32:
 328                 adinr |= (0 << 16);
 329                 break;
 330         default:
 331                 dev_warn(dev, "not supported sample bits\n");
 332                 return 0;
 333         }
 334
 335         return adinr;
 336 }
 337
 338 /*
 339  *      rsnd_dai functions
 340  */
 341 #define __rsnd_mod_call(mod, func, rdai)                        \
 342 ({                                                              \
 343         struct rsnd_priv *priv = rsnd_mod_to_priv(mod);         \
 344         struct device *dev = rsnd_priv_to_dev(priv);            \
 345         dev_dbg(dev, "%s [%d] %s\n",                            \
 346                 rsnd_mod_name(mod), rsnd_mod_id(mod), #func);   \
 347         (mod)->ops->func(mod, rdai);                            \
 348 })
 349
 350 #define rsnd_mod_call(mod, func, rdai)  \
 351         (!(mod) ? -ENODEV :                     \
 352          !((mod)->ops->func) ? 0 :              \
 353          __rsnd_mod_call(mod, func, (rdai)))
 354
 355 #define rsnd_dai_call(rdai, io, fn)                             \
 356 ({                                                              \
 357         struct rsnd_mod *mod;                                   \
 358         int ret = 0, i;                                         \
 359         for (i = 0; i < RSND_MOD_MAX; i++) {                    \
 360                 mod = (io)->mod[i];                             \
 361                 if (!mod)                                       \
 362                         continue;                               \
 363                 ret = rsnd_mod_call(mod, fn, (rdai));           \
 364                 if (ret < 0)                                    \
 365                         break;                                  \
 366         }                                                       \
 367         ret;                                                    \
 368 })
 369
 370 static int rsnd_dai_connect(struct rsnd_mod *mod,
 371                             struct rsnd_dai_stream *io)
 372 {
 373         if (!mod)
 374                 return -EIO;
 375
 376         if (io->mod[mod->type]) {
 377                 struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
 378                 struct device *dev = rsnd_priv_to_dev(priv);
 379
 380                 dev_err(dev, "%s%d is not empty\n",
 381                         rsnd_mod_name(mod),
 382                         rsnd_mod_id(mod));
 383                 return -EIO;
 384         }
 385
 386         io->mod[mod->type] = mod;
 387         mod->io = io;
 388
 389         return 0;
 390 }
 391
 392 int rsnd_dai_id(struct rsnd_priv *priv, struct rsnd_dai *rdai)
 393 {
 394         int id = rdai - priv->rdai;
 395
 396         if ((id < 0) || (id >= rsnd_rdai_nr(priv)))
 397                 return -EINVAL;
 398
 399         return id;
 400 }
 401
 402 struct rsnd_dai *rsnd_dai_get(struct rsnd_priv *priv, int id)
 403 {
 404         if ((id < 0) || (id >= rsnd_rdai_nr(priv)))
 405                 return NULL;
 406
 407         return priv->rdai + id;
 408 }
 409
 410 static struct rsnd_dai *rsnd_dai_to_rdai(struct snd_soc_dai *dai)
 411 {
 412         struct rsnd_priv *priv = snd_soc_dai_get_drvdata(dai);
 413
 414         return rsnd_dai_get(priv, dai->id);
 415 }
 416
 417 int rsnd_dai_is_play(struct rsnd_dai *rdai, struct rsnd_dai_stream *io)
 418 {
 419         return &rdai->playback == io;
 420 }
 421
 422 /*
 423  *      rsnd_soc_dai functions
 424  */
 425 int rsnd_dai_pointer_offset(struct rsnd_dai_stream *io, int additional)
 426 {
 427         struct snd_pcm_substream *substream = io->substream;
 428         struct snd_pcm_runtime *runtime = substream->runtime;
 429         int pos = io->byte_pos + additional;
 430
 431         pos %= (runtime->periods * io->byte_per_period);
 432
 433         return pos;
 434 }
 435
 436 void rsnd_dai_pointer_update(struct rsnd_dai_stream *io, int byte)
 437 {
 438         io->byte_pos += byte;
 439
 440         if (io->byte_pos >= io->next_period_byte) {
 441                 struct snd_pcm_substream *substream = io->substream;
 442                 struct snd_pcm_runtime *runtime = substream->runtime;
 443
 444                 io->period_pos++;
 445                 io->next_period_byte += io->byte_per_period;
 446
 447                 if (io->period_pos >= runtime->periods) {
 448                         io->byte_pos = 0;
 449                         io->period_pos = 0;
 450                         io->next_period_byte = io->byte_per_period;
 451                 }
 452
 453                 snd_pcm_period_elapsed(substream);
 454         }
 455 }
 456
 457 static int rsnd_dai_stream_init(struct rsnd_dai_stream *io,
 458                                 struct snd_pcm_substream *substream)
 459 {
 460         struct snd_pcm_runtime *runtime = substream->runtime;
 461
 462         io->substream           = substream;
 463         io->byte_pos            = 0;
 464         io->period_pos          = 0;
 465         io->byte_per_period     = runtime->period_size *
 466                                   runtime->channels *
 467                                   samples_to_bytes(runtime, 1);
 468         io->next_period_byte    = io->byte_per_period;
 469
 470         return 0;
 471 }
 472
 473 static
 474 struct snd_soc_dai *rsnd_substream_to_dai(struct snd_pcm_substream *substream)
 475 {
 476         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 477
 478         return  rtd->cpu_dai;
 479 }
 480
 481 static
 482 struct rsnd_dai_stream *rsnd_rdai_to_io(struct rsnd_dai *rdai,
 483                                         struct snd_pcm_substream *substream)
 484 {
 485         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 486                 return &rdai->playback;
 487         else
 488                 return &rdai->capture;
 489 }
 490
 491 static int rsnd_soc_dai_trigger(struct snd_pcm_substream *substream, int cmd,
 492                             struct snd_soc_dai *dai)
 493 {
 494         struct rsnd_priv *priv = snd_soc_dai_get_drvdata(dai);
 495         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
 496         struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream);
 497         int ssi_id = rsnd_mod_id(rsnd_io_to_mod_ssi(io));
 498         int ret;
 499         unsigned long flags;
 500
 501         rsnd_lock(priv, flags);
 502
 503         switch (cmd) {
 504         case SNDRV_PCM_TRIGGER_START:
 505                 ret = rsnd_dai_stream_init(io, substream);
 506                 if (ret < 0)
 507                         goto dai_trigger_end;
 508
 509                 ret = rsnd_platform_call(priv, dai, start, ssi_id);
 510                 if (ret < 0)
 511                         goto dai_trigger_end;
 512
 513                 ret = rsnd_dai_call(rdai, io, init);
 514                 if (ret < 0)
 515                         goto dai_trigger_end;
 516
 517                 ret = rsnd_dai_call(rdai, io, start);
 518                 if (ret < 0)
 519                         goto dai_trigger_end;
 520                 break;
 521         case SNDRV_PCM_TRIGGER_STOP:
 522                 ret = rsnd_dai_call(rdai, io, stop);
 523                 if (ret < 0)
 524                         goto dai_trigger_end;
 525
 526                 ret = rsnd_dai_call(rdai, io, quit);
 527                 if (ret < 0)
 528                         goto dai_trigger_end;
 529
 530                 ret = rsnd_platform_call(priv, dai, stop, ssi_id);
 531                 if (ret < 0)
 532                         goto dai_trigger_end;
 533                 break;
 534         default:
 535                 ret = -EINVAL;
 536         }
 537
 538 dai_trigger_end:
 539         rsnd_unlock(priv, flags);
 540
 541         return ret;
 542 }
 543
 544 static int rsnd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
 545 {
 546         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
 547
 548         /* set master/slave audio interface */
 549         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 550         case SND_SOC_DAIFMT_CBM_CFM:
 551                 rdai->clk_master = 0;
 552                 break;
 553         case SND_SOC_DAIFMT_CBS_CFS:
 554                 rdai->clk_master = 1; /* codec is slave, cpu is master */
 555                 break;
 556         default:
 557                 return -EINVAL;
 558         }
 559
 560         /* set clock inversion */
 561         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
 562         case SND_SOC_DAIFMT_NB_IF:
 563                 rdai->bit_clk_inv = 0;
 564                 rdai->frm_clk_inv = 1;
 565                 break;
 566         case SND_SOC_DAIFMT_IB_NF:
 567                 rdai->bit_clk_inv = 1;
 568                 rdai->frm_clk_inv = 0;
 569                 break;
 570         case SND_SOC_DAIFMT_IB_IF:
 571                 rdai->bit_clk_inv = 1;
 572                 rdai->frm_clk_inv = 1;
 573                 break;
 574         case SND_SOC_DAIFMT_NB_NF:
 575         default:
 576                 rdai->bit_clk_inv = 0;
 577                 rdai->frm_clk_inv = 0;
 578                 break;
 579         }
 580
 581         /* set format */
 582         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 583         case SND_SOC_DAIFMT_I2S:
 584                 rdai->sys_delay = 0;
 585                 rdai->data_alignment = 0;
 586                 break;
 587         case SND_SOC_DAIFMT_LEFT_J:
 588                 rdai->sys_delay = 1;
 589                 rdai->data_alignment = 0;
 590                 break;
 591         case SND_SOC_DAIFMT_RIGHT_J:
 592                 rdai->sys_delay = 1;
 593                 rdai->data_alignment = 1;
 594                 break;
 595         }
 596
 597         return 0;
 598 }
 599
 600 static const struct snd_soc_dai_ops rsnd_soc_dai_ops = {
 601         .trigger        = rsnd_soc_dai_trigger,
 602         .set_fmt        = rsnd_soc_dai_set_fmt,
 603 };
 604
 605 #define rsnd_path_parse(priv, io, type)                         \
 606 ({                                                              \
 607         struct rsnd_mod *mod;                                   \
 608         int ret = 0;                                            \
 609         int id = -1;                                            \
 610                                                                 \
 611         if (rsnd_is_enable_path(io, type)) {                    \
 612                 id = rsnd_info_id(priv, io, type);              \
 613                 if (id >= 0) {                                  \
 614                         mod = rsnd_##type##_mod_get(priv, id);  \
 615                         ret = rsnd_dai_connect(mod, io);        \
 616                 }                                               \
 617         }                                                       \
 618         ret;                                                    \
 619 })
 620
 621 static int rsnd_path_init(struct rsnd_priv *priv,
 622                           struct rsnd_dai *rdai,
 623                           struct rsnd_dai_stream *io)
 624 {
 625         int ret;
 626
 627         /*
 628          * Gen1 is created by SRU/SSI, and this SRU is base module of
 629          * Gen2's SCU/SSIU/SSI. (Gen2 SCU/SSIU came from SRU)
 630          *
 631          * Easy image is..
 632          *      Gen1 SRU = Gen2 SCU + SSIU + etc
 633          *
 634          * Gen2 SCU path is very flexible, but, Gen1 SRU (SCU parts) is
 635          * using fixed path.
 636          */
 637
 638         /* SRC */
 639         ret = rsnd_path_parse(priv, io, src);
 640         if (ret < 0)
 641                 return ret;
 642
 643         /* SSI */
 644         ret = rsnd_path_parse(priv, io, ssi);
 645         if (ret < 0)
 646                 return ret;
 647
 648         return ret;
 649 }
 650
 651 static void rsnd_of_parse_dai(struct platform_device *pdev,
 652                               const struct rsnd_of_data *of_data,
 653                               struct rsnd_priv *priv)
 654 {
 655         struct device_node *dai_node,   *dai_np;
 656         struct device_node *ssi_node,   *ssi_np;
 657         struct device_node *src_node,   *src_np;
 658         struct device_node *playback, *capture;
 659         struct rsnd_dai_platform_info *dai_info;
 660         struct rcar_snd_info *info = rsnd_priv_to_info(priv);
 661         struct device *dev = &pdev->dev;
 662         int nr, i;
 663         int dai_i, ssi_i, src_i;
 664
 665         if (!of_data)
 666                 return;
 667
 668         dai_node = of_get_child_by_name(dev->of_node, "rcar_sound,dai");
 669         if (!dai_node)
 670                 return;
 671
 672         nr = of_get_child_count(dai_node);
 673         if (!nr)
 674                 return;
 675
 676         dai_info = devm_kzalloc(dev,
 677                                 sizeof(struct rsnd_dai_platform_info) * nr,
 678                                 GFP_KERNEL);
 679         if (!dai_info) {
 680                 dev_err(dev, "dai info allocation error\n");
 681                 return;
 682         }
 683
 684         info->dai_info_nr       = nr;
 685         info->dai_info          = dai_info;
 686
 687         ssi_node = of_get_child_by_name(dev->of_node, "rcar_sound,ssi");
 688         src_node = of_get_child_by_name(dev->of_node, "rcar_sound,src");
 689
 690 #define mod_parse(name)                                                 \
 691 if (name##_node) {                                                      \
 692         struct rsnd_##name##_platform_info *name##_info;                \
 693                                                                         \
 694         name##_i = 0;                                                   \
 695         for_each_child_of_node(name##_node, name##_np) {                \
 696                 name##_info = info->name##_info + name##_i;             \
 697                                                                         \
 698                 if (name##_np == playback)                              \
 699                         dai_info->playback.name = name##_info;          \
 700                 if (name##_np == capture)                               \
 701                         dai_info->capture.name = name##_info;           \
 702                                                                         \
 703                 name##_i++;                                             \
 704         }                                                               \
 705 }
 706
 707         /*
 708          * parse all dai
 709          */
 710         dai_i = 0;
 711         for_each_child_of_node(dai_node, dai_np) {
 712                 dai_info = info->dai_info + dai_i;
 713
 714                 for (i = 0;; i++) {
 715
 716                         playback = of_parse_phandle(dai_np, "playback", i);
 717                         capture  = of_parse_phandle(dai_np, "capture", i);
 718
 719                         if (!playback && !capture)
 720                                 break;
 721
 722                         mod_parse(ssi);
 723                         mod_parse(src);
 724
 725                         if (playback)
 726                                 of_node_put(playback);
 727                         if (capture)
 728                                 of_node_put(capture);
 729                 }
 730
 731                 dai_i++;
 732         }
 733 }
 734
 735 static int rsnd_dai_probe(struct platform_device *pdev,
 736                           const struct rsnd_of_data *of_data,
 737                           struct rsnd_priv *priv)
 738 {
 739         struct snd_soc_dai_driver *drv;
 740         struct rcar_snd_info *info = rsnd_priv_to_info(priv);
 741         struct rsnd_dai *rdai;
 742         struct rsnd_ssi_platform_info *pmod, *cmod;
 743         struct device *dev = rsnd_priv_to_dev(priv);
 744         int dai_nr;
 745         int i;
 746
 747         rsnd_of_parse_dai(pdev, of_data, priv);
 748
 749         dai_nr = info->dai_info_nr;
 750         if (!dai_nr) {
 751                 dev_err(dev, "no dai\n");
 752                 return -EIO;
 753         }
 754
 755         drv  = devm_kzalloc(dev, sizeof(*drv)  * dai_nr, GFP_KERNEL);
 756         rdai = devm_kzalloc(dev, sizeof(*rdai) * dai_nr, GFP_KERNEL);
 757         if (!drv || !rdai) {
 758                 dev_err(dev, "dai allocate failed\n");
 759                 return -ENOMEM;
 760         }
 761
 762         priv->rdai_nr   = dai_nr;
 763         priv->daidrv    = drv;
 764         priv->rdai      = rdai;
 765
 766         for (i = 0; i < dai_nr; i++) {
 767                 rdai[i].info = &info->dai_info[i];
 768
 769                 pmod = rdai[i].info->playback.ssi;
 770                 cmod = rdai[i].info->capture.ssi;
 771
 772                 /*
 773                  *      init rsnd_dai
 774                  */
 775                 snprintf(rdai[i].name, RSND_DAI_NAME_SIZE, "rsnd-dai.%d", i);
 776
 777                 /*
 778                  *      init snd_soc_dai_driver
 779                  */
 780                 drv[i].name     = rdai[i].name;
 781                 drv[i].ops      = &rsnd_soc_dai_ops;
 782                 if (pmod) {
 783                         drv[i].playback.rates           = RSND_RATES;
 784                         drv[i].playback.formats         = RSND_FMTS;
 785                         drv[i].playback.channels_min    = 2;
 786                         drv[i].playback.channels_max    = 2;
 787
 788                         rdai[i].playback.info = &info->dai_info[i].playback;
 789                         rsnd_path_init(priv, &rdai[i], &rdai[i].playback);
 790                 }
 791                 if (cmod) {
 792                         drv[i].capture.rates            = RSND_RATES;
 793                         drv[i].capture.formats          = RSND_FMTS;
 794                         drv[i].capture.channels_min     = 2;
 795                         drv[i].capture.channels_max     = 2;
 796
 797                         rdai[i].capture.info = &info->dai_info[i].capture;
 798                         rsnd_path_init(priv, &rdai[i], &rdai[i].capture);
 799                 }
 800
 801                 dev_dbg(dev, "%s (%s/%s)\n", rdai[i].name,
 802                         pmod ? "play"    : " -- ",
 803                         cmod ? "capture" : "  --   ");
 804         }
 805
 806         return 0;
 807 }
 808
 809 /*
 810  *              pcm ops
 811  */
 812 static struct snd_pcm_hardware rsnd_pcm_hardware = {
 813         .info =         SNDRV_PCM_INFO_INTERLEAVED      |
 814                         SNDRV_PCM_INFO_MMAP             |
 815                         SNDRV_PCM_INFO_MMAP_VALID       |
 816                         SNDRV_PCM_INFO_PAUSE,
 817         .buffer_bytes_max       = 64 * 1024,
 818         .period_bytes_min       = 32,
 819         .period_bytes_max       = 8192,
 820         .periods_min            = 1,
 821         .periods_max            = 32,
 822         .fifo_size              = 256,
 823 };
 824
 825 static int rsnd_pcm_open(struct snd_pcm_substream *substream)
 826 {
 827         struct snd_pcm_runtime *runtime = substream->runtime;
 828         int ret = 0;
 829
 830         snd_soc_set_runtime_hwparams(substream, &rsnd_pcm_hardware);
 831
 832         ret = snd_pcm_hw_constraint_integer(runtime,
 833                                             SNDRV_PCM_HW_PARAM_PERIODS);
 834
 835         return ret;
 836 }
 837
 838 static int rsnd_hw_params(struct snd_pcm_substream *substream,
 839                          struct snd_pcm_hw_params *hw_params)
 840 {
 841         return snd_pcm_lib_malloc_pages(substream,
 842                                         params_buffer_bytes(hw_params));
 843 }
 844
 845 static snd_pcm_uframes_t rsnd_pointer(struct snd_pcm_substream *substream)
 846 {
 847         struct snd_pcm_runtime *runtime = substream->runtime;
 848         struct snd_soc_dai *dai = rsnd_substream_to_dai(substream);
 849         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
 850         struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream);
 851
 852         return bytes_to_frames(runtime, io->byte_pos);
 853 }
 854
 855 static struct snd_pcm_ops rsnd_pcm_ops = {
 856         .open           = rsnd_pcm_open,
 857         .ioctl          = snd_pcm_lib_ioctl,
 858         .hw_params      = rsnd_hw_params,
 859         .hw_free        = snd_pcm_lib_free_pages,
 860         .pointer        = rsnd_pointer,
 861 };
 862
 863 /*
 864  *              snd_soc_platform
 865  */
 866
 867 #define PREALLOC_BUFFER         (32 * 1024)
 868 #define PREALLOC_BUFFER_MAX     (32 * 1024)
 869
 870 static int rsnd_pcm_new(struct snd_soc_pcm_runtime *rtd)
 871 {
 872         return snd_pcm_lib_preallocate_pages_for_all(
 873                 rtd->pcm,
 874                 SNDRV_DMA_TYPE_DEV,
 875                 rtd->card->snd_card->dev,
 876                 PREALLOC_BUFFER, PREALLOC_BUFFER_MAX);
 877 }
 878
 879 static void rsnd_pcm_free(struct snd_pcm *pcm)
 880 {
 881         snd_pcm_lib_preallocate_free_for_all(pcm);
 882 }
 883
 884 static struct snd_soc_platform_driver rsnd_soc_platform = {
 885         .ops            = &rsnd_pcm_ops,
 886         .pcm_new        = rsnd_pcm_new,
 887         .pcm_free       = rsnd_pcm_free,
 888 };
 889
 890 static const struct snd_soc_component_driver rsnd_soc_component = {
 891         .name           = "rsnd",
 892 };
 893
 894 /*
 895  *      rsnd probe
 896  */
 897 static int rsnd_probe(struct platform_device *pdev)
 898 {
 899         struct rcar_snd_info *info;
 900         struct rsnd_priv *priv;
 901         struct device *dev = &pdev->dev;
 902         struct rsnd_dai *rdai;
 903         const struct of_device_id *of_id = of_match_device(rsnd_of_match, dev);
 904         const struct rsnd_of_data *of_data;
 905         int (*probe_func[])(struct platform_device *pdev,
 906                             const struct rsnd_of_data *of_data,
 907                             struct rsnd_priv *priv) = {
 908                 rsnd_gen_probe,
 909                 rsnd_ssi_probe,
 910                 rsnd_src_probe,
 911                 rsnd_adg_probe,
 912                 rsnd_dai_probe,
 913         };
 914         int ret, i;
 915
 916         info = NULL;
 917         of_data = NULL;
 918         if (of_id) {
 919                 info = devm_kzalloc(&pdev->dev,
 920                                     sizeof(struct rcar_snd_info), GFP_KERNEL);
 921                 of_data = of_id->data;
 922         } else {
 923                 info = pdev->dev.platform_data;
 924         }
 925
 926         if (!info) {
 927                 dev_err(dev, "driver needs R-Car sound information\n");
 928                 return -ENODEV;
 929         }
 930
 931         /*
 932          *      init priv data
 933          */
 934         priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
 935         if (!priv) {
 936                 dev_err(dev, "priv allocate failed\n");
 937                 return -ENODEV;
 938         }
 939
 940         priv->dev       = dev;
 941         priv->info      = info;
 942         spin_lock_init(&priv->lock);
 943
 944         /*
 945          *      init each module
 946          */
 947         for (i = 0; i < ARRAY_SIZE(probe_func); i++) {
 948                 ret = probe_func[i](pdev, of_data, priv);
 949                 if (ret)
 950                         return ret;
 951         }
 952
 953         for_each_rsnd_dai(rdai, priv, i) {
 954                 ret = rsnd_dai_call(rdai, &rdai->playback, probe);
 955                 if (ret)
 956                         return ret;
 957
 958                 ret = rsnd_dai_call(rdai, &rdai->capture, probe);
 959                 if (ret)
 960                         return ret;
 961         }
 962
 963         /*
 964          *      asoc register
 965          */
 966         ret = snd_soc_register_platform(dev, &rsnd_soc_platform);
 967         if (ret < 0) {
 968                 dev_err(dev, "cannot snd soc register\n");
 969                 return ret;
 970         }
 971
 972         ret = snd_soc_register_component(dev, &rsnd_soc_component,
 973                                          priv->daidrv, rsnd_rdai_nr(priv));
 974         if (ret < 0) {
 975                 dev_err(dev, "cannot snd dai register\n");
 976                 goto exit_snd_soc;
 977         }
 978
 979         dev_set_drvdata(dev, priv);
 980
 981         pm_runtime_enable(dev);
 982
 983         dev_info(dev, "probed\n");
 984         return ret;
 985
 986 exit_snd_soc:
 987         snd_soc_unregister_platform(dev);
 988
 989         return ret;
 990 }
 991
 992 static int rsnd_remove(struct platform_device *pdev)
 993 {
 994         struct rsnd_priv *priv = dev_get_drvdata(&pdev->dev);
 995         struct rsnd_dai *rdai;
 996         int ret, i;
 997
 998         pm_runtime_disable(&pdev->dev);
 999
1000         for_each_rsnd_dai(rdai, priv, i) {
1001                 ret = rsnd_dai_call(rdai, &rdai->playback, remove);
1002                 if (ret)
1003                         return ret;
1004
1005                 ret = rsnd_dai_call(rdai, &rdai->capture, remove);
1006                 if (ret)
1007                         return ret;
1008         }
1009
1010         return 0;
1011 }
1012
1013 static struct platform_driver rsnd_driver = {
1014         .driver = {
1015                 .name   = "rcar_sound",
1016                 .of_match_table = rsnd_of_match,
1017         },
1018         .probe          = rsnd_probe,
1019         .remove         = rsnd_remove,
1020 };
1021 module_platform_driver(rsnd_driver);
1022
1023 MODULE_LICENSE("GPL");
1024 MODULE_DESCRIPTION("Renesas R-Car audio driver");
1025 MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");
1026 MODULE_ALIAS("platform:rcar-pcm-audio");