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 char *rsnd_mod_dma_name(struct rsnd_mod *mod)
 142 {
 143         if (!mod || !mod->ops)
 144                 return "unknown";
 145
 146         if (!mod->ops->dma_name)
 147                 return mod->ops->name;
 148
 149         return mod->ops->dma_name(mod);
 150 }
 151
 152 void rsnd_mod_init(struct rsnd_priv *priv,
 153                    struct rsnd_mod *mod,
 154                    struct rsnd_mod_ops *ops,
 155                    enum rsnd_mod_type type,
 156                    int id)
 157 {
 158         mod->priv       = priv;
 159         mod->id         = id;
 160         mod->ops        = ops;
 161         mod->type       = type;
 162 }
 163
 164 /*
 165  *      rsnd_dma functions
 166  */
 167 static void __rsnd_dma_start(struct rsnd_dma *dma);
 168 static void rsnd_dma_continue(struct rsnd_dma *dma)
 169 {
 170         /* push next A or B plane */
 171         dma->submit_loop = 1;
 172         schedule_work(&dma->work);
 173 }
 174
 175 void rsnd_dma_start(struct rsnd_dma *dma)
 176 {
 177         /* push both A and B plane*/
 178         dma->offset = 0;
 179         dma->submit_loop = 2;
 180         __rsnd_dma_start(dma);
 181 }
 182
 183 void rsnd_dma_stop(struct rsnd_dma *dma)
 184 {
 185         dma->submit_loop = 0;
 186         cancel_work_sync(&dma->work);
 187         dmaengine_terminate_all(dma->chan);
 188 }
 189
 190 static void rsnd_dma_complete(void *data)
 191 {
 192         struct rsnd_dma *dma = (struct rsnd_dma *)data;
 193         struct rsnd_mod *mod = rsnd_dma_to_mod(dma);
 194         struct rsnd_priv *priv = rsnd_mod_to_priv(rsnd_dma_to_mod(dma));
 195         struct rsnd_dai_stream *io = rsnd_mod_to_io(mod);
 196         unsigned long flags;
 197
 198         rsnd_lock(priv, flags);
 199
 200         /*
 201          * Renesas sound Gen1 needs 1 DMAC,
 202          * Gen2 needs 2 DMAC.
 203          * In Gen2 case, it are Audio-DMAC, and Audio-DMAC-peri-peri.
 204          * But, Audio-DMAC-peri-peri doesn't have interrupt,
 205          * and this driver is assuming that here.
 206          *
 207          * If Audio-DMAC-peri-peri has interrpt,
 208          * rsnd_dai_pointer_update() will be called twice,
 209          * ant it will breaks io->byte_pos
 210          */
 211         if (dma->submit_loop)
 212                 rsnd_dma_continue(dma);
 213
 214         rsnd_unlock(priv, flags);
 215
 216         rsnd_dai_pointer_update(io, io->byte_per_period);
 217 }
 218
 219 static void __rsnd_dma_start(struct rsnd_dma *dma)
 220 {
 221         struct rsnd_mod *mod = rsnd_dma_to_mod(dma);
 222         struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
 223         struct rsnd_dai_stream *io = rsnd_mod_to_io(mod);
 224         struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
 225         struct device *dev = rsnd_priv_to_dev(priv);
 226         struct dma_async_tx_descriptor *desc;
 227         dma_addr_t buf;
 228         size_t len = io->byte_per_period;
 229         int i;
 230
 231         for (i = 0; i < dma->submit_loop; i++) {
 232
 233                 buf = runtime->dma_addr +
 234                         rsnd_dai_pointer_offset(io, dma->offset + len);
 235                 dma->offset = len;
 236
 237                 desc = dmaengine_prep_slave_single(
 238                         dma->chan, buf, len, dma->dir,
 239                         DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
 240                 if (!desc) {
 241                         dev_err(dev, "dmaengine_prep_slave_sg() fail\n");
 242                         return;
 243                 }
 244
 245                 desc->callback          = rsnd_dma_complete;
 246                 desc->callback_param    = dma;
 247
 248                 if (dmaengine_submit(desc) < 0) {
 249                         dev_err(dev, "dmaengine_submit() fail\n");
 250                         return;
 251                 }
 252
 253                 dma_async_issue_pending(dma->chan);
 254         }
 255 }
 256
 257 static void rsnd_dma_do_work(struct work_struct *work)
 258 {
 259         struct rsnd_dma *dma = container_of(work, struct rsnd_dma, work);
 260
 261         __rsnd_dma_start(dma);
 262 }
 263
 264 int rsnd_dma_available(struct rsnd_dma *dma)
 265 {
 266         return !!dma->chan;
 267 }
 268
 269 #define DMA_NAME_SIZE 16
 270 #define MOD_MAX 4 /* MEM/SSI/SRC/DVC */
 271 static int _rsnd_dma_of_name(char *dma_name, struct rsnd_mod *mod)
 272 {
 273         if (mod)
 274                 return snprintf(dma_name, DMA_NAME_SIZE / 2, "%s%d",
 275                          rsnd_mod_dma_name(mod), rsnd_mod_id(mod));
 276         else
 277                 return snprintf(dma_name, DMA_NAME_SIZE / 2, "mem");
 278
 279 }
 280
 281 static void rsnd_dma_of_name(struct rsnd_dma *dma,
 282                              int is_play, char *dma_name)
 283 {
 284         struct rsnd_mod *this = rsnd_dma_to_mod(dma);
 285         struct rsnd_dai_stream *io = rsnd_mod_to_io(this);
 286         struct rsnd_mod *ssi = rsnd_io_to_mod_ssi(io);
 287         struct rsnd_mod *src = rsnd_io_to_mod_src(io);
 288         struct rsnd_mod *dvc = rsnd_io_to_mod_dvc(io);
 289         struct rsnd_mod *mod[MOD_MAX];
 290         struct rsnd_mod *src_mod, *dst_mod;
 291         int i, index;
 292
 293
 294         for (i = 0; i < MOD_MAX; i++)
 295                 mod[i] = NULL;
 296
 297         /*
 298          * in play case...
 299          *
 300          * src -> dst
 301          *
 302          * mem -> SSI
 303          * mem -> SRC -> SSI
 304          * mem -> SRC -> DVC -> SSI
 305          */
 306         mod[0] = NULL; /* for "mem" */
 307         index = 1;
 308         for (i = 1; i < MOD_MAX; i++) {
 309                 if (!src) {
 310                         mod[i] = ssi;
 311                 } else if (!dvc) {
 312                         mod[i] = src;
 313                         src = NULL;
 314                 } else {
 315                         mod[i] = dvc;
 316                         dvc = NULL;
 317                 }
 318
 319                 if (mod[i] == this)
 320                         index = i;
 321
 322                 if (mod[i] == ssi)
 323                         break;
 324         }
 325
 326         if (is_play) {
 327                 src_mod = mod[index - 1];
 328                 dst_mod = mod[index];
 329         } else {
 330                 src_mod = mod[index];
 331                 dst_mod = mod[index - 1];
 332         }
 333
 334         index = 0;
 335         index = _rsnd_dma_of_name(dma_name + index, src_mod);
 336         *(dma_name + index++) = '_';
 337         index = _rsnd_dma_of_name(dma_name + index, dst_mod);
 338 }
 339
 340 int rsnd_dma_init(struct rsnd_priv *priv, struct rsnd_dma *dma,
 341                   int is_play, int id)
 342 {
 343         struct device *dev = rsnd_priv_to_dev(priv);
 344         struct dma_slave_config cfg;
 345         char dma_name[DMA_NAME_SIZE];
 346         dma_cap_mask_t mask;
 347         int ret;
 348
 349         if (dma->chan) {
 350                 dev_err(dev, "it already has dma channel\n");
 351                 return -EIO;
 352         }
 353
 354         dma_cap_zero(mask);
 355         dma_cap_set(DMA_SLAVE, mask);
 356
 357         rsnd_dma_of_name(dma, is_play, dma_name);
 358         rsnd_gen_dma_addr(priv, dma, &cfg, is_play, id);
 359
 360         dev_dbg(dev, "dma name : %s\n", dma_name);
 361
 362         dma->chan = dma_request_slave_channel_compat(mask, shdma_chan_filter,
 363                                                      (void *)id, dev,
 364                                                      dma_name);
 365         if (!dma->chan) {
 366                 dev_err(dev, "can't get dma channel\n");
 367                 return -EIO;
 368         }
 369
 370         ret = dmaengine_slave_config(dma->chan, &cfg);
 371         if (ret < 0)
 372                 goto rsnd_dma_init_err;
 373
 374         dma->dir = is_play ? DMA_MEM_TO_DEV : DMA_DEV_TO_MEM;
 375         INIT_WORK(&dma->work, rsnd_dma_do_work);
 376
 377         return 0;
 378
 379 rsnd_dma_init_err:
 380         rsnd_dma_quit(priv, dma);
 381
 382         return ret;
 383 }
 384
 385 void  rsnd_dma_quit(struct rsnd_priv *priv,
 386                     struct rsnd_dma *dma)
 387 {
 388         if (dma->chan)
 389                 dma_release_channel(dma->chan);
 390
 391         dma->chan = NULL;
 392 }
 393
 394 /*
 395  *      settting function
 396  */
 397 u32 rsnd_get_adinr(struct rsnd_mod *mod)
 398 {
 399         struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
 400         struct rsnd_dai_stream *io = rsnd_mod_to_io(mod);
 401         struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
 402         struct device *dev = rsnd_priv_to_dev(priv);
 403         u32 adinr = runtime->channels;
 404
 405         switch (runtime->sample_bits) {
 406         case 16:
 407                 adinr |= (8 << 16);
 408                 break;
 409         case 32:
 410                 adinr |= (0 << 16);
 411                 break;
 412         default:
 413                 dev_warn(dev, "not supported sample bits\n");
 414                 return 0;
 415         }
 416
 417         return adinr;
 418 }
 419
 420 /*
 421  *      rsnd_dai functions
 422  */
 423 #define __rsnd_mod_call(mod, func, rdai...)                     \
 424 ({                                                              \
 425         struct rsnd_priv *priv = rsnd_mod_to_priv(mod);         \
 426         struct device *dev = rsnd_priv_to_dev(priv);            \
 427         dev_dbg(dev, "%s [%d] %s\n",                            \
 428                 rsnd_mod_name(mod), rsnd_mod_id(mod), #func);   \
 429         (mod)->ops->func(mod, rdai);                            \
 430 })
 431
 432 #define rsnd_mod_call(mod, func, rdai...)       \
 433         (!(mod) ? -ENODEV :                     \
 434          !((mod)->ops->func) ? 0 :              \
 435          __rsnd_mod_call(mod, func, rdai))
 436
 437 #define rsnd_dai_call(fn, io, rdai...)                          \
 438 ({                                                              \
 439         struct rsnd_mod *mod;                                   \
 440         int ret = 0, i;                                         \
 441         for (i = 0; i < RSND_MOD_MAX; i++) {                    \
 442                 mod = (io)->mod[i];                             \
 443                 if (!mod)                                       \
 444                         continue;                               \
 445                 ret = rsnd_mod_call(mod, fn, rdai);             \
 446                 if (ret < 0)                                    \
 447                         break;                                  \
 448         }                                                       \
 449         ret;                                                    \
 450 })
 451
 452 static int rsnd_dai_connect(struct rsnd_mod *mod,
 453                             struct rsnd_dai_stream *io)
 454 {
 455         if (!mod)
 456                 return -EIO;
 457
 458         if (io->mod[mod->type]) {
 459                 struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
 460                 struct device *dev = rsnd_priv_to_dev(priv);
 461
 462                 dev_err(dev, "%s%d is not empty\n",
 463                         rsnd_mod_name(mod),
 464                         rsnd_mod_id(mod));
 465                 return -EIO;
 466         }
 467
 468         io->mod[mod->type] = mod;
 469         mod->io = io;
 470
 471         return 0;
 472 }
 473
 474 int rsnd_dai_id(struct rsnd_priv *priv, struct rsnd_dai *rdai)
 475 {
 476         int id = rdai - priv->rdai;
 477
 478         if ((id < 0) || (id >= rsnd_rdai_nr(priv)))
 479                 return -EINVAL;
 480
 481         return id;
 482 }
 483
 484 struct rsnd_dai *rsnd_dai_get(struct rsnd_priv *priv, int id)
 485 {
 486         if ((id < 0) || (id >= rsnd_rdai_nr(priv)))
 487                 return NULL;
 488
 489         return priv->rdai + id;
 490 }
 491
 492 static struct rsnd_dai *rsnd_dai_to_rdai(struct snd_soc_dai *dai)
 493 {
 494         struct rsnd_priv *priv = snd_soc_dai_get_drvdata(dai);
 495
 496         return rsnd_dai_get(priv, dai->id);
 497 }
 498
 499 int rsnd_dai_is_play(struct rsnd_dai *rdai, struct rsnd_dai_stream *io)
 500 {
 501         return &rdai->playback == io;
 502 }
 503
 504 /*
 505  *      rsnd_soc_dai functions
 506  */
 507 int rsnd_dai_pointer_offset(struct rsnd_dai_stream *io, int additional)
 508 {
 509         struct snd_pcm_substream *substream = io->substream;
 510         struct snd_pcm_runtime *runtime = substream->runtime;
 511         int pos = io->byte_pos + additional;
 512
 513         pos %= (runtime->periods * io->byte_per_period);
 514
 515         return pos;
 516 }
 517
 518 void rsnd_dai_pointer_update(struct rsnd_dai_stream *io, int byte)
 519 {
 520         io->byte_pos += byte;
 521
 522         if (io->byte_pos >= io->next_period_byte) {
 523                 struct snd_pcm_substream *substream = io->substream;
 524                 struct snd_pcm_runtime *runtime = substream->runtime;
 525
 526                 io->period_pos++;
 527                 io->next_period_byte += io->byte_per_period;
 528
 529                 if (io->period_pos >= runtime->periods) {
 530                         io->byte_pos = 0;
 531                         io->period_pos = 0;
 532                         io->next_period_byte = io->byte_per_period;
 533                 }
 534
 535                 snd_pcm_period_elapsed(substream);
 536         }
 537 }
 538
 539 static int rsnd_dai_stream_init(struct rsnd_dai_stream *io,
 540                                 struct snd_pcm_substream *substream)
 541 {
 542         struct snd_pcm_runtime *runtime = substream->runtime;
 543
 544         io->substream           = substream;
 545         io->byte_pos            = 0;
 546         io->period_pos          = 0;
 547         io->byte_per_period     = runtime->period_size *
 548                                   runtime->channels *
 549                                   samples_to_bytes(runtime, 1);
 550         io->next_period_byte    = io->byte_per_period;
 551
 552         return 0;
 553 }
 554
 555 static
 556 struct snd_soc_dai *rsnd_substream_to_dai(struct snd_pcm_substream *substream)
 557 {
 558         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 559
 560         return  rtd->cpu_dai;
 561 }
 562
 563 static
 564 struct rsnd_dai_stream *rsnd_rdai_to_io(struct rsnd_dai *rdai,
 565                                         struct snd_pcm_substream *substream)
 566 {
 567         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 568                 return &rdai->playback;
 569         else
 570                 return &rdai->capture;
 571 }
 572
 573 static int rsnd_soc_dai_trigger(struct snd_pcm_substream *substream, int cmd,
 574                             struct snd_soc_dai *dai)
 575 {
 576         struct rsnd_priv *priv = snd_soc_dai_get_drvdata(dai);
 577         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
 578         struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream);
 579         int ssi_id = rsnd_mod_id(rsnd_io_to_mod_ssi(io));
 580         int ret;
 581         unsigned long flags;
 582
 583         rsnd_lock(priv, flags);
 584
 585         switch (cmd) {
 586         case SNDRV_PCM_TRIGGER_START:
 587                 ret = rsnd_dai_stream_init(io, substream);
 588                 if (ret < 0)
 589                         goto dai_trigger_end;
 590
 591                 ret = rsnd_platform_call(priv, dai, start, ssi_id);
 592                 if (ret < 0)
 593                         goto dai_trigger_end;
 594
 595                 ret = rsnd_dai_call(init, io, rdai);
 596                 if (ret < 0)
 597                         goto dai_trigger_end;
 598
 599                 ret = rsnd_dai_call(start, io, rdai);
 600                 if (ret < 0)
 601                         goto dai_trigger_end;
 602                 break;
 603         case SNDRV_PCM_TRIGGER_STOP:
 604                 ret = rsnd_dai_call(stop, io, rdai);
 605                 if (ret < 0)
 606                         goto dai_trigger_end;
 607
 608                 ret = rsnd_dai_call(quit, io, rdai);
 609                 if (ret < 0)
 610                         goto dai_trigger_end;
 611
 612                 ret = rsnd_platform_call(priv, dai, stop, ssi_id);
 613                 if (ret < 0)
 614                         goto dai_trigger_end;
 615                 break;
 616         default:
 617                 ret = -EINVAL;
 618         }
 619
 620 dai_trigger_end:
 621         rsnd_unlock(priv, flags);
 622
 623         return ret;
 624 }
 625
 626 static int rsnd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
 627 {
 628         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
 629
 630         /* set master/slave audio interface */
 631         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 632         case SND_SOC_DAIFMT_CBM_CFM:
 633                 rdai->clk_master = 0;
 634                 break;
 635         case SND_SOC_DAIFMT_CBS_CFS:
 636                 rdai->clk_master = 1; /* codec is slave, cpu is master */
 637                 break;
 638         default:
 639                 return -EINVAL;
 640         }
 641
 642         /* set clock inversion */
 643         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
 644         case SND_SOC_DAIFMT_NB_IF:
 645                 rdai->bit_clk_inv = 0;
 646                 rdai->frm_clk_inv = 1;
 647                 break;
 648         case SND_SOC_DAIFMT_IB_NF:
 649                 rdai->bit_clk_inv = 1;
 650                 rdai->frm_clk_inv = 0;
 651                 break;
 652         case SND_SOC_DAIFMT_IB_IF:
 653                 rdai->bit_clk_inv = 1;
 654                 rdai->frm_clk_inv = 1;
 655                 break;
 656         case SND_SOC_DAIFMT_NB_NF:
 657         default:
 658                 rdai->bit_clk_inv = 0;
 659                 rdai->frm_clk_inv = 0;
 660                 break;
 661         }
 662
 663         /* set format */
 664         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 665         case SND_SOC_DAIFMT_I2S:
 666                 rdai->sys_delay = 0;
 667                 rdai->data_alignment = 0;
 668                 break;
 669         case SND_SOC_DAIFMT_LEFT_J:
 670                 rdai->sys_delay = 1;
 671                 rdai->data_alignment = 0;
 672                 break;
 673         case SND_SOC_DAIFMT_RIGHT_J:
 674                 rdai->sys_delay = 1;
 675                 rdai->data_alignment = 1;
 676                 break;
 677         }
 678
 679         return 0;
 680 }
 681
 682 static const struct snd_soc_dai_ops rsnd_soc_dai_ops = {
 683         .trigger        = rsnd_soc_dai_trigger,
 684         .set_fmt        = rsnd_soc_dai_set_fmt,
 685 };
 686
 687 #define rsnd_path_parse(priv, io, type)                         \
 688 ({                                                              \
 689         struct rsnd_mod *mod;                                   \
 690         int ret = 0;                                            \
 691         int id = -1;                                            \
 692                                                                 \
 693         if (rsnd_is_enable_path(io, type)) {                    \
 694                 id = rsnd_info_id(priv, io, type);              \
 695                 if (id >= 0) {                                  \
 696                         mod = rsnd_##type##_mod_get(priv, id);  \
 697                         ret = rsnd_dai_connect(mod, io);        \
 698                 }                                               \
 699         }                                                       \
 700         ret;                                                    \
 701 })
 702
 703 static int rsnd_path_init(struct rsnd_priv *priv,
 704                           struct rsnd_dai *rdai,
 705                           struct rsnd_dai_stream *io)
 706 {
 707         int ret;
 708
 709         /*
 710          * Gen1 is created by SRU/SSI, and this SRU is base module of
 711          * Gen2's SCU/SSIU/SSI. (Gen2 SCU/SSIU came from SRU)
 712          *
 713          * Easy image is..
 714          *      Gen1 SRU = Gen2 SCU + SSIU + etc
 715          *
 716          * Gen2 SCU path is very flexible, but, Gen1 SRU (SCU parts) is
 717          * using fixed path.
 718          */
 719
 720         /* SRC */
 721         ret = rsnd_path_parse(priv, io, src);
 722         if (ret < 0)
 723                 return ret;
 724
 725         /* SSI */
 726         ret = rsnd_path_parse(priv, io, ssi);
 727         if (ret < 0)
 728                 return ret;
 729
 730         /* DVC */
 731         ret = rsnd_path_parse(priv, io, dvc);
 732         if (ret < 0)
 733                 return ret;
 734
 735         return ret;
 736 }
 737
 738 static void rsnd_of_parse_dai(struct platform_device *pdev,
 739                               const struct rsnd_of_data *of_data,
 740                               struct rsnd_priv *priv)
 741 {
 742         struct device_node *dai_node,   *dai_np;
 743         struct device_node *ssi_node,   *ssi_np;
 744         struct device_node *src_node,   *src_np;
 745         struct device_node *playback, *capture;
 746         struct rsnd_dai_platform_info *dai_info;
 747         struct rcar_snd_info *info = rsnd_priv_to_info(priv);
 748         struct device *dev = &pdev->dev;
 749         int nr, i;
 750         int dai_i, ssi_i, src_i;
 751
 752         if (!of_data)
 753                 return;
 754
 755         dai_node = of_get_child_by_name(dev->of_node, "rcar_sound,dai");
 756         if (!dai_node)
 757                 return;
 758
 759         nr = of_get_child_count(dai_node);
 760         if (!nr)
 761                 return;
 762
 763         dai_info = devm_kzalloc(dev,
 764                                 sizeof(struct rsnd_dai_platform_info) * nr,
 765                                 GFP_KERNEL);
 766         if (!dai_info) {
 767                 dev_err(dev, "dai info allocation error\n");
 768                 return;
 769         }
 770
 771         info->dai_info_nr       = nr;
 772         info->dai_info          = dai_info;
 773
 774         ssi_node = of_get_child_by_name(dev->of_node, "rcar_sound,ssi");
 775         src_node = of_get_child_by_name(dev->of_node, "rcar_sound,src");
 776
 777 #define mod_parse(name)                                                 \
 778 if (name##_node) {                                                      \
 779         struct rsnd_##name##_platform_info *name##_info;                \
 780                                                                         \
 781         name##_i = 0;                                                   \
 782         for_each_child_of_node(name##_node, name##_np) {                \
 783                 name##_info = info->name##_info + name##_i;             \
 784                                                                         \
 785                 if (name##_np == playback)                              \
 786                         dai_info->playback.name = name##_info;          \
 787                 if (name##_np == capture)                               \
 788                         dai_info->capture.name = name##_info;           \
 789                                                                         \
 790                 name##_i++;                                             \
 791         }                                                               \
 792 }
 793
 794         /*
 795          * parse all dai
 796          */
 797         dai_i = 0;
 798         for_each_child_of_node(dai_node, dai_np) {
 799                 dai_info = info->dai_info + dai_i;
 800
 801                 for (i = 0;; i++) {
 802
 803                         playback = of_parse_phandle(dai_np, "playback", i);
 804                         capture  = of_parse_phandle(dai_np, "capture", i);
 805
 806                         if (!playback && !capture)
 807                                 break;
 808
 809                         mod_parse(ssi);
 810                         mod_parse(src);
 811
 812                         if (playback)
 813                                 of_node_put(playback);
 814                         if (capture)
 815                                 of_node_put(capture);
 816                 }
 817
 818                 dai_i++;
 819         }
 820 }
 821
 822 static int rsnd_dai_probe(struct platform_device *pdev,
 823                           const struct rsnd_of_data *of_data,
 824                           struct rsnd_priv *priv)
 825 {
 826         struct snd_soc_dai_driver *drv;
 827         struct rcar_snd_info *info = rsnd_priv_to_info(priv);
 828         struct rsnd_dai *rdai;
 829         struct rsnd_ssi_platform_info *pmod, *cmod;
 830         struct device *dev = rsnd_priv_to_dev(priv);
 831         int dai_nr;
 832         int i;
 833
 834         rsnd_of_parse_dai(pdev, of_data, priv);
 835
 836         dai_nr = info->dai_info_nr;
 837         if (!dai_nr) {
 838                 dev_err(dev, "no dai\n");
 839                 return -EIO;
 840         }
 841
 842         drv  = devm_kzalloc(dev, sizeof(*drv)  * dai_nr, GFP_KERNEL);
 843         rdai = devm_kzalloc(dev, sizeof(*rdai) * dai_nr, GFP_KERNEL);
 844         if (!drv || !rdai) {
 845                 dev_err(dev, "dai allocate failed\n");
 846                 return -ENOMEM;
 847         }
 848
 849         priv->rdai_nr   = dai_nr;
 850         priv->daidrv    = drv;
 851         priv->rdai      = rdai;
 852
 853         for (i = 0; i < dai_nr; i++) {
 854                 rdai[i].info = &info->dai_info[i];
 855
 856                 pmod = rdai[i].info->playback.ssi;
 857                 cmod = rdai[i].info->capture.ssi;
 858
 859                 /*
 860                  *      init rsnd_dai
 861                  */
 862                 snprintf(rdai[i].name, RSND_DAI_NAME_SIZE, "rsnd-dai.%d", i);
 863
 864                 /*
 865                  *      init snd_soc_dai_driver
 866                  */
 867                 drv[i].name     = rdai[i].name;
 868                 drv[i].ops      = &rsnd_soc_dai_ops;
 869                 if (pmod) {
 870                         drv[i].playback.rates           = RSND_RATES;
 871                         drv[i].playback.formats         = RSND_FMTS;
 872                         drv[i].playback.channels_min    = 2;
 873                         drv[i].playback.channels_max    = 2;
 874
 875                         rdai[i].playback.info = &info->dai_info[i].playback;
 876                         rsnd_path_init(priv, &rdai[i], &rdai[i].playback);
 877                 }
 878                 if (cmod) {
 879                         drv[i].capture.rates            = RSND_RATES;
 880                         drv[i].capture.formats          = RSND_FMTS;
 881                         drv[i].capture.channels_min     = 2;
 882                         drv[i].capture.channels_max     = 2;
 883
 884                         rdai[i].capture.info = &info->dai_info[i].capture;
 885                         rsnd_path_init(priv, &rdai[i], &rdai[i].capture);
 886                 }
 887
 888                 dev_dbg(dev, "%s (%s/%s)\n", rdai[i].name,
 889                         pmod ? "play"    : " -- ",
 890                         cmod ? "capture" : "  --   ");
 891         }
 892
 893         return 0;
 894 }
 895
 896 /*
 897  *              pcm ops
 898  */
 899 static struct snd_pcm_hardware rsnd_pcm_hardware = {
 900         .info =         SNDRV_PCM_INFO_INTERLEAVED      |
 901                         SNDRV_PCM_INFO_MMAP             |
 902                         SNDRV_PCM_INFO_MMAP_VALID       |
 903                         SNDRV_PCM_INFO_PAUSE,
 904         .buffer_bytes_max       = 64 * 1024,
 905         .period_bytes_min       = 32,
 906         .period_bytes_max       = 8192,
 907         .periods_min            = 1,
 908         .periods_max            = 32,
 909         .fifo_size              = 256,
 910 };
 911
 912 static int rsnd_pcm_open(struct snd_pcm_substream *substream)
 913 {
 914         struct snd_pcm_runtime *runtime = substream->runtime;
 915         int ret = 0;
 916
 917         snd_soc_set_runtime_hwparams(substream, &rsnd_pcm_hardware);
 918
 919         ret = snd_pcm_hw_constraint_integer(runtime,
 920                                             SNDRV_PCM_HW_PARAM_PERIODS);
 921
 922         return ret;
 923 }
 924
 925 static int rsnd_hw_params(struct snd_pcm_substream *substream,
 926                          struct snd_pcm_hw_params *hw_params)
 927 {
 928         return snd_pcm_lib_malloc_pages(substream,
 929                                         params_buffer_bytes(hw_params));
 930 }
 931
 932 static snd_pcm_uframes_t rsnd_pointer(struct snd_pcm_substream *substream)
 933 {
 934         struct snd_pcm_runtime *runtime = substream->runtime;
 935         struct snd_soc_dai *dai = rsnd_substream_to_dai(substream);
 936         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
 937         struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream);
 938
 939         return bytes_to_frames(runtime, io->byte_pos);
 940 }
 941
 942 static struct snd_pcm_ops rsnd_pcm_ops = {
 943         .open           = rsnd_pcm_open,
 944         .ioctl          = snd_pcm_lib_ioctl,
 945         .hw_params      = rsnd_hw_params,
 946         .hw_free        = snd_pcm_lib_free_pages,
 947         .pointer        = rsnd_pointer,
 948 };
 949
 950 /*
 951  *              snd_soc_platform
 952  */
 953
 954 #define PREALLOC_BUFFER         (32 * 1024)
 955 #define PREALLOC_BUFFER_MAX     (32 * 1024)
 956
 957 static int rsnd_pcm_new(struct snd_soc_pcm_runtime *rtd)
 958 {
 959         struct rsnd_priv *priv = snd_soc_dai_get_drvdata(rtd->cpu_dai);
 960         struct rsnd_dai *rdai;
 961         int i, ret;
 962
 963         for_each_rsnd_dai(rdai, priv, i) {
 964                 ret = rsnd_dai_call(pcm_new, &rdai->playback, rdai, rtd);
 965                 if (ret)
 966                         return ret;
 967
 968                 ret = rsnd_dai_call(pcm_new, &rdai->capture, rdai, rtd);
 969                 if (ret)
 970                         return ret;
 971         }
 972
 973         return snd_pcm_lib_preallocate_pages_for_all(
 974                 rtd->pcm,
 975                 SNDRV_DMA_TYPE_DEV,
 976                 rtd->card->snd_card->dev,
 977                 PREALLOC_BUFFER, PREALLOC_BUFFER_MAX);
 978 }
 979
 980 static void rsnd_pcm_free(struct snd_pcm *pcm)
 981 {
 982         snd_pcm_lib_preallocate_free_for_all(pcm);
 983 }
 984
 985 static struct snd_soc_platform_driver rsnd_soc_platform = {
 986         .ops            = &rsnd_pcm_ops,
 987         .pcm_new        = rsnd_pcm_new,
 988         .pcm_free       = rsnd_pcm_free,
 989 };
 990
 991 static const struct snd_soc_component_driver rsnd_soc_component = {
 992         .name           = "rsnd",
 993 };
 994
 995 /*
 996  *      rsnd probe
 997  */
 998 static int rsnd_probe(struct platform_device *pdev)
 999 {
1000         struct rcar_snd_info *info;
1001         struct rsnd_priv *priv;
1002         struct device *dev = &pdev->dev;
1003         struct rsnd_dai *rdai;
1004         const struct of_device_id *of_id = of_match_device(rsnd_of_match, dev);
1005         const struct rsnd_of_data *of_data;
1006         int (*probe_func[])(struct platform_device *pdev,
1007                             const struct rsnd_of_data *of_data,
1008                             struct rsnd_priv *priv) = {
1009                 rsnd_gen_probe,
1010                 rsnd_ssi_probe,
1011                 rsnd_src_probe,
1012                 rsnd_dvc_probe,
1013                 rsnd_adg_probe,
1014                 rsnd_dai_probe,
1015         };
1016         int ret, i;
1017
1018         info = NULL;
1019         of_data = NULL;
1020         if (of_id) {
1021                 info = devm_kzalloc(&pdev->dev,
1022                                     sizeof(struct rcar_snd_info), GFP_KERNEL);
1023                 of_data = of_id->data;
1024         } else {
1025                 info = pdev->dev.platform_data;
1026         }
1027
1028         if (!info) {
1029                 dev_err(dev, "driver needs R-Car sound information\n");
1030                 return -ENODEV;
1031         }
1032
1033         /*
1034          *      init priv data
1035          */
1036         priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
1037         if (!priv) {
1038                 dev_err(dev, "priv allocate failed\n");
1039                 return -ENODEV;
1040         }
1041
1042         priv->pdev      = pdev;
1043         priv->info      = info;
1044         spin_lock_init(&priv->lock);
1045
1046         /*
1047          *      init each module
1048          */
1049         for (i = 0; i < ARRAY_SIZE(probe_func); i++) {
1050                 ret = probe_func[i](pdev, of_data, priv);
1051                 if (ret)
1052                         return ret;
1053         }
1054
1055         for_each_rsnd_dai(rdai, priv, i) {
1056                 ret = rsnd_dai_call(probe, &rdai->playback, rdai);
1057                 if (ret)
1058                         return ret;
1059
1060                 ret = rsnd_dai_call(probe, &rdai->capture, rdai);
1061                 if (ret)
1062                         return ret;
1063         }
1064
1065         /*
1066          *      asoc register
1067          */
1068         ret = snd_soc_register_platform(dev, &rsnd_soc_platform);
1069         if (ret < 0) {
1070                 dev_err(dev, "cannot snd soc register\n");
1071                 return ret;
1072         }
1073
1074         ret = snd_soc_register_component(dev, &rsnd_soc_component,
1075                                          priv->daidrv, rsnd_rdai_nr(priv));
1076         if (ret < 0) {
1077                 dev_err(dev, "cannot snd dai register\n");
1078                 goto exit_snd_soc;
1079         }
1080
1081         dev_set_drvdata(dev, priv);
1082
1083         pm_runtime_enable(dev);
1084
1085         dev_info(dev, "probed\n");
1086         return ret;
1087
1088 exit_snd_soc:
1089         snd_soc_unregister_platform(dev);
1090
1091         return ret;
1092 }
1093
1094 static int rsnd_remove(struct platform_device *pdev)
1095 {
1096         struct rsnd_priv *priv = dev_get_drvdata(&pdev->dev);
1097         struct rsnd_dai *rdai;
1098         int ret, i;
1099
1100         pm_runtime_disable(&pdev->dev);
1101
1102         for_each_rsnd_dai(rdai, priv, i) {
1103                 ret = rsnd_dai_call(remove, &rdai->playback, rdai);
1104                 if (ret)
1105                         return ret;
1106
1107                 ret = rsnd_dai_call(remove, &rdai->capture, rdai);
1108                 if (ret)
1109                         return ret;
1110         }
1111
1112         return 0;
1113 }
1114
1115 static struct platform_driver rsnd_driver = {
1116         .driver = {
1117                 .name   = "rcar_sound",
1118                 .of_match_table = rsnd_of_match,
1119         },
1120         .probe          = rsnd_probe,
1121         .remove         = rsnd_remove,
1122 };
1123 module_platform_driver(rsnd_driver);
1124
1125 MODULE_LICENSE("GPL");
1126 MODULE_DESCRIPTION("Renesas R-Car audio driver");
1127 MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");
1128 MODULE_ALIAS("platform:rcar-pcm-audio");