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 void rsnd_dma_stop(struct rsnd_dma *dma)
 168 {
 169         dmaengine_terminate_all(dma->chan);
 170 }
 171
 172 static void rsnd_dma_complete(void *data)
 173 {
 174         struct rsnd_dma *dma = (struct rsnd_dma *)data;
 175         struct rsnd_mod *mod = rsnd_dma_to_mod(dma);
 176         struct rsnd_dai_stream *io = rsnd_mod_to_io(mod);
 177
 178         /*
 179          * Renesas sound Gen1 needs 1 DMAC,
 180          * Gen2 needs 2 DMAC.
 181          * In Gen2 case, it are Audio-DMAC, and Audio-DMAC-peri-peri.
 182          * But, Audio-DMAC-peri-peri doesn't have interrupt,
 183          * and this driver is assuming that here.
 184          *
 185          * If Audio-DMAC-peri-peri has interrpt,
 186          * rsnd_dai_pointer_update() will be called twice,
 187          * ant it will breaks io->byte_pos
 188          */
 189
 190         rsnd_dai_pointer_update(io, io->byte_per_period);
 191 }
 192
 193 void rsnd_dma_start(struct rsnd_dma *dma)
 194 {
 195         struct rsnd_mod *mod = rsnd_dma_to_mod(dma);
 196         struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
 197         struct rsnd_dai_stream *io = rsnd_mod_to_io(mod);
 198         struct snd_pcm_substream *substream = io->substream;
 199         struct device *dev = rsnd_priv_to_dev(priv);
 200         struct dma_async_tx_descriptor *desc;
 201
 202         desc = dmaengine_prep_dma_cyclic(dma->chan,
 203                                          (dma->addr) ? dma->addr :
 204                                          substream->runtime->dma_addr,
 205                                          snd_pcm_lib_buffer_bytes(substream),
 206                                          snd_pcm_lib_period_bytes(substream),
 207                                          dma->dir,
 208                                          DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
 209
 210         if (!desc) {
 211                 dev_err(dev, "dmaengine_prep_slave_sg() fail\n");
 212                 return;
 213         }
 214
 215         desc->callback          = rsnd_dma_complete;
 216         desc->callback_param    = dma;
 217
 218         if (dmaengine_submit(desc) < 0) {
 219                 dev_err(dev, "dmaengine_submit() fail\n");
 220                 return;
 221         }
 222
 223         dma_async_issue_pending(dma->chan);
 224 }
 225
 226 int rsnd_dma_available(struct rsnd_dma *dma)
 227 {
 228         return !!dma->chan;
 229 }
 230
 231 #define DMA_NAME_SIZE 16
 232 #define MOD_MAX 4 /* MEM/SSI/SRC/DVC */
 233 static int _rsnd_dma_of_name(char *dma_name, struct rsnd_mod *mod)
 234 {
 235         if (mod)
 236                 return snprintf(dma_name, DMA_NAME_SIZE / 2, "%s%d",
 237                          rsnd_mod_dma_name(mod), rsnd_mod_id(mod));
 238         else
 239                 return snprintf(dma_name, DMA_NAME_SIZE / 2, "mem");
 240
 241 }
 242
 243 static void rsnd_dma_of_name(struct rsnd_mod *mod_from,
 244                              struct rsnd_mod *mod_to,
 245                              char *dma_name)
 246 {
 247         int index = 0;
 248
 249         index = _rsnd_dma_of_name(dma_name + index, mod_from);
 250         *(dma_name + index++) = '_';
 251         index = _rsnd_dma_of_name(dma_name + index, mod_to);
 252 }
 253
 254 static void rsnd_dma_of_path(struct rsnd_dma *dma,
 255                              int is_play,
 256                              struct rsnd_mod **mod_from,
 257                              struct rsnd_mod **mod_to)
 258 {
 259         struct rsnd_mod *this = rsnd_dma_to_mod(dma);
 260         struct rsnd_dai_stream *io = rsnd_mod_to_io(this);
 261         struct rsnd_mod *ssi = rsnd_io_to_mod_ssi(io);
 262         struct rsnd_mod *src = rsnd_io_to_mod_src(io);
 263         struct rsnd_mod *dvc = rsnd_io_to_mod_dvc(io);
 264         struct rsnd_mod *mod[MOD_MAX];
 265         int i, index;
 266
 267
 268         for (i = 0; i < MOD_MAX; i++)
 269                 mod[i] = NULL;
 270
 271         /*
 272          * in play case...
 273          *
 274          * src -> dst
 275          *
 276          * mem -> SSI
 277          * mem -> SRC -> SSI
 278          * mem -> SRC -> DVC -> SSI
 279          */
 280         mod[0] = NULL; /* for "mem" */
 281         index = 1;
 282         for (i = 1; i < MOD_MAX; i++) {
 283                 if (!src) {
 284                         mod[i] = ssi;
 285                 } else if (!dvc) {
 286                         mod[i] = src;
 287                         src = NULL;
 288                 } else {
 289                         if ((!is_play) && (this == src))
 290                                 this = dvc;
 291
 292                         mod[i] = (is_play) ? src : dvc;
 293                         i++;
 294                         mod[i] = (is_play) ? dvc : src;
 295                         src = NULL;
 296                         dvc = NULL;
 297                 }
 298
 299                 if (mod[i] == this)
 300                         index = i;
 301
 302                 if (mod[i] == ssi)
 303                         break;
 304         }
 305
 306         if (is_play) {
 307                 *mod_from = mod[index - 1];
 308                 *mod_to   = mod[index];
 309         } else {
 310                 *mod_from = mod[index];
 311                 *mod_to   = mod[index - 1];
 312         }
 313 }
 314
 315 int rsnd_dma_init(struct rsnd_priv *priv, struct rsnd_dma *dma,
 316                   int is_play, int id)
 317 {
 318         struct device *dev = rsnd_priv_to_dev(priv);
 319         struct dma_slave_config cfg;
 320         struct rsnd_mod *mod_from;
 321         struct rsnd_mod *mod_to;
 322         char dma_name[DMA_NAME_SIZE];
 323         dma_cap_mask_t mask;
 324         int ret;
 325
 326         if (dma->chan) {
 327                 dev_err(dev, "it already has dma channel\n");
 328                 return -EIO;
 329         }
 330
 331         dma_cap_zero(mask);
 332         dma_cap_set(DMA_SLAVE, mask);
 333
 334         rsnd_dma_of_path(dma, is_play, &mod_from, &mod_to);
 335         rsnd_dma_of_name(mod_from, mod_to, dma_name);
 336
 337         cfg.slave_id    = id;
 338         cfg.direction   = is_play ? DMA_MEM_TO_DEV : DMA_DEV_TO_MEM;
 339         cfg.src_addr    = rsnd_gen_dma_addr(priv, mod_from, is_play, 1);
 340         cfg.dst_addr    = rsnd_gen_dma_addr(priv, mod_to,   is_play, 0);
 341         cfg.src_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
 342         cfg.dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
 343
 344         dev_dbg(dev, "dma : %s %pad -> %pad\n",
 345                 dma_name, &cfg.src_addr, &cfg.dst_addr);
 346
 347         dma->chan = dma_request_slave_channel_compat(mask, shdma_chan_filter,
 348                                                      (void *)id, dev,
 349                                                      dma_name);
 350         if (!dma->chan) {
 351                 dev_err(dev, "can't get dma channel\n");
 352                 return -EIO;
 353         }
 354
 355         ret = dmaengine_slave_config(dma->chan, &cfg);
 356         if (ret < 0)
 357                 goto rsnd_dma_init_err;
 358
 359         dma->addr = is_play ? cfg.src_addr : cfg.dst_addr;
 360         dma->dir = is_play ? DMA_MEM_TO_DEV : DMA_DEV_TO_MEM;
 361
 362         return 0;
 363
 364 rsnd_dma_init_err:
 365         rsnd_dma_quit(priv, dma);
 366
 367         return ret;
 368 }
 369
 370 void  rsnd_dma_quit(struct rsnd_priv *priv,
 371                     struct rsnd_dma *dma)
 372 {
 373         if (dma->chan)
 374                 dma_release_channel(dma->chan);
 375
 376         dma->chan = NULL;
 377 }
 378
 379 /*
 380  *      settting function
 381  */
 382 u32 rsnd_get_adinr(struct rsnd_mod *mod)
 383 {
 384         struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
 385         struct rsnd_dai_stream *io = rsnd_mod_to_io(mod);
 386         struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
 387         struct device *dev = rsnd_priv_to_dev(priv);
 388         u32 adinr = runtime->channels;
 389
 390         switch (runtime->sample_bits) {
 391         case 16:
 392                 adinr |= (8 << 16);
 393                 break;
 394         case 32:
 395                 adinr |= (0 << 16);
 396                 break;
 397         default:
 398                 dev_warn(dev, "not supported sample bits\n");
 399                 return 0;
 400         }
 401
 402         return adinr;
 403 }
 404
 405 /*
 406  *      rsnd_dai functions
 407  */
 408 #define __rsnd_mod_call(mod, func, rdai...)                     \
 409 ({                                                              \
 410         struct rsnd_priv *priv = rsnd_mod_to_priv(mod);         \
 411         struct device *dev = rsnd_priv_to_dev(priv);            \
 412         dev_dbg(dev, "%s [%d] %s\n",                            \
 413                 rsnd_mod_name(mod), rsnd_mod_id(mod), #func);   \
 414         (mod)->ops->func(mod, rdai);                            \
 415 })
 416
 417 #define rsnd_mod_call(mod, func, rdai...)       \
 418         (!(mod) ? -ENODEV :                     \
 419          !((mod)->ops->func) ? 0 :              \
 420          __rsnd_mod_call(mod, func, rdai))
 421
 422 #define rsnd_dai_call(fn, io, rdai...)                          \
 423 ({                                                              \
 424         struct rsnd_mod *mod;                                   \
 425         int ret = 0, i;                                         \
 426         for (i = 0; i < RSND_MOD_MAX; i++) {                    \
 427                 mod = (io)->mod[i];                             \
 428                 if (!mod)                                       \
 429                         continue;                               \
 430                 ret = rsnd_mod_call(mod, fn, rdai);             \
 431                 if (ret < 0)                                    \
 432                         break;                                  \
 433         }                                                       \
 434         ret;                                                    \
 435 })
 436
 437 static int rsnd_dai_connect(struct rsnd_mod *mod,
 438                             struct rsnd_dai_stream *io)
 439 {
 440         if (!mod)
 441                 return -EIO;
 442
 443         if (io->mod[mod->type]) {
 444                 struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
 445                 struct device *dev = rsnd_priv_to_dev(priv);
 446
 447                 dev_err(dev, "%s%d is not empty\n",
 448                         rsnd_mod_name(mod),
 449                         rsnd_mod_id(mod));
 450                 return -EIO;
 451         }
 452
 453         io->mod[mod->type] = mod;
 454         mod->io = io;
 455
 456         return 0;
 457 }
 458
 459 int rsnd_dai_id(struct rsnd_priv *priv, struct rsnd_dai *rdai)
 460 {
 461         int id = rdai - priv->rdai;
 462
 463         if ((id < 0) || (id >= rsnd_rdai_nr(priv)))
 464                 return -EINVAL;
 465
 466         return id;
 467 }
 468
 469 struct rsnd_dai *rsnd_dai_get(struct rsnd_priv *priv, int id)
 470 {
 471         if ((id < 0) || (id >= rsnd_rdai_nr(priv)))
 472                 return NULL;
 473
 474         return priv->rdai + id;
 475 }
 476
 477 static struct rsnd_dai *rsnd_dai_to_rdai(struct snd_soc_dai *dai)
 478 {
 479         struct rsnd_priv *priv = snd_soc_dai_get_drvdata(dai);
 480
 481         return rsnd_dai_get(priv, dai->id);
 482 }
 483
 484 int rsnd_dai_is_play(struct rsnd_dai *rdai, struct rsnd_dai_stream *io)
 485 {
 486         return &rdai->playback == io;
 487 }
 488
 489 /*
 490  *      rsnd_soc_dai functions
 491  */
 492 int rsnd_dai_pointer_offset(struct rsnd_dai_stream *io, int additional)
 493 {
 494         struct snd_pcm_substream *substream = io->substream;
 495         struct snd_pcm_runtime *runtime = substream->runtime;
 496         int pos = io->byte_pos + additional;
 497
 498         pos %= (runtime->periods * io->byte_per_period);
 499
 500         return pos;
 501 }
 502
 503 void rsnd_dai_pointer_update(struct rsnd_dai_stream *io, int byte)
 504 {
 505         io->byte_pos += byte;
 506
 507         if (io->byte_pos >= io->next_period_byte) {
 508                 struct snd_pcm_substream *substream = io->substream;
 509                 struct snd_pcm_runtime *runtime = substream->runtime;
 510
 511                 io->period_pos++;
 512                 io->next_period_byte += io->byte_per_period;
 513
 514                 if (io->period_pos >= runtime->periods) {
 515                         io->byte_pos = 0;
 516                         io->period_pos = 0;
 517                         io->next_period_byte = io->byte_per_period;
 518                 }
 519
 520                 snd_pcm_period_elapsed(substream);
 521         }
 522 }
 523
 524 static int rsnd_dai_stream_init(struct rsnd_dai_stream *io,
 525                                 struct snd_pcm_substream *substream)
 526 {
 527         struct snd_pcm_runtime *runtime = substream->runtime;
 528
 529         io->substream           = substream;
 530         io->byte_pos            = 0;
 531         io->period_pos          = 0;
 532         io->byte_per_period     = runtime->period_size *
 533                                   runtime->channels *
 534                                   samples_to_bytes(runtime, 1);
 535         io->next_period_byte    = io->byte_per_period;
 536
 537         return 0;
 538 }
 539
 540 static
 541 struct snd_soc_dai *rsnd_substream_to_dai(struct snd_pcm_substream *substream)
 542 {
 543         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 544
 545         return  rtd->cpu_dai;
 546 }
 547
 548 static
 549 struct rsnd_dai_stream *rsnd_rdai_to_io(struct rsnd_dai *rdai,
 550                                         struct snd_pcm_substream *substream)
 551 {
 552         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 553                 return &rdai->playback;
 554         else
 555                 return &rdai->capture;
 556 }
 557
 558 static int rsnd_soc_dai_trigger(struct snd_pcm_substream *substream, int cmd,
 559                             struct snd_soc_dai *dai)
 560 {
 561         struct rsnd_priv *priv = snd_soc_dai_get_drvdata(dai);
 562         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
 563         struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream);
 564         int ssi_id = rsnd_mod_id(rsnd_io_to_mod_ssi(io));
 565         int ret;
 566         unsigned long flags;
 567
 568         rsnd_lock(priv, flags);
 569
 570         switch (cmd) {
 571         case SNDRV_PCM_TRIGGER_START:
 572                 ret = rsnd_dai_stream_init(io, substream);
 573                 if (ret < 0)
 574                         goto dai_trigger_end;
 575
 576                 ret = rsnd_platform_call(priv, dai, start, ssi_id);
 577                 if (ret < 0)
 578                         goto dai_trigger_end;
 579
 580                 ret = rsnd_dai_call(init, io, rdai);
 581                 if (ret < 0)
 582                         goto dai_trigger_end;
 583
 584                 ret = rsnd_dai_call(start, io, rdai);
 585                 if (ret < 0)
 586                         goto dai_trigger_end;
 587                 break;
 588         case SNDRV_PCM_TRIGGER_STOP:
 589                 ret = rsnd_dai_call(stop, io, rdai);
 590                 if (ret < 0)
 591                         goto dai_trigger_end;
 592
 593                 ret = rsnd_dai_call(quit, io, rdai);
 594                 if (ret < 0)
 595                         goto dai_trigger_end;
 596
 597                 ret = rsnd_platform_call(priv, dai, stop, ssi_id);
 598                 if (ret < 0)
 599                         goto dai_trigger_end;
 600                 break;
 601         default:
 602                 ret = -EINVAL;
 603         }
 604
 605 dai_trigger_end:
 606         rsnd_unlock(priv, flags);
 607
 608         return ret;
 609 }
 610
 611 static int rsnd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
 612 {
 613         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
 614
 615         /* set master/slave audio interface */
 616         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 617         case SND_SOC_DAIFMT_CBM_CFM:
 618                 rdai->clk_master = 0;
 619                 break;
 620         case SND_SOC_DAIFMT_CBS_CFS:
 621                 rdai->clk_master = 1; /* codec is slave, cpu is master */
 622                 break;
 623         default:
 624                 return -EINVAL;
 625         }
 626
 627         /* set format */
 628         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 629         case SND_SOC_DAIFMT_I2S:
 630                 rdai->sys_delay = 0;
 631                 rdai->data_alignment = 0;
 632                 rdai->frm_clk_inv = 0;
 633                 break;
 634         case SND_SOC_DAIFMT_LEFT_J:
 635                 rdai->sys_delay = 1;
 636                 rdai->data_alignment = 0;
 637                 rdai->frm_clk_inv = 1;
 638                 break;
 639         case SND_SOC_DAIFMT_RIGHT_J:
 640                 rdai->sys_delay = 1;
 641                 rdai->data_alignment = 1;
 642                 rdai->frm_clk_inv = 1;
 643                 break;
 644         }
 645
 646         /* set clock inversion */
 647         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
 648         case SND_SOC_DAIFMT_NB_IF:
 649                 rdai->bit_clk_inv =  rdai->bit_clk_inv;
 650                 rdai->frm_clk_inv = !rdai->frm_clk_inv;
 651                 break;
 652         case SND_SOC_DAIFMT_IB_NF:
 653                 rdai->bit_clk_inv = !rdai->bit_clk_inv;
 654                 rdai->frm_clk_inv =  rdai->frm_clk_inv;
 655                 break;
 656         case SND_SOC_DAIFMT_IB_IF:
 657                 rdai->bit_clk_inv = !rdai->bit_clk_inv;
 658                 rdai->frm_clk_inv = !rdai->frm_clk_inv;
 659                 break;
 660         case SND_SOC_DAIFMT_NB_NF:
 661         default:
 662                 break;
 663         }
 664
 665         return 0;
 666 }
 667
 668 static const struct snd_soc_dai_ops rsnd_soc_dai_ops = {
 669         .trigger        = rsnd_soc_dai_trigger,
 670         .set_fmt        = rsnd_soc_dai_set_fmt,
 671 };
 672
 673 #define rsnd_path_parse(priv, io, type)                         \
 674 ({                                                              \
 675         struct rsnd_mod *mod;                                   \
 676         int ret = 0;                                            \
 677         int id = -1;                                            \
 678                                                                 \
 679         if (rsnd_is_enable_path(io, type)) {                    \
 680                 id = rsnd_info_id(priv, io, type);              \
 681                 if (id >= 0) {                                  \
 682                         mod = rsnd_##type##_mod_get(priv, id);  \
 683                         ret = rsnd_dai_connect(mod, io);        \
 684                 }                                               \
 685         }                                                       \
 686         ret;                                                    \
 687 })
 688
 689 static int rsnd_path_init(struct rsnd_priv *priv,
 690                           struct rsnd_dai *rdai,
 691                           struct rsnd_dai_stream *io)
 692 {
 693         int ret;
 694
 695         /*
 696          * Gen1 is created by SRU/SSI, and this SRU is base module of
 697          * Gen2's SCU/SSIU/SSI. (Gen2 SCU/SSIU came from SRU)
 698          *
 699          * Easy image is..
 700          *      Gen1 SRU = Gen2 SCU + SSIU + etc
 701          *
 702          * Gen2 SCU path is very flexible, but, Gen1 SRU (SCU parts) is
 703          * using fixed path.
 704          */
 705
 706         /* SRC */
 707         ret = rsnd_path_parse(priv, io, src);
 708         if (ret < 0)
 709                 return ret;
 710
 711         /* SSI */
 712         ret = rsnd_path_parse(priv, io, ssi);
 713         if (ret < 0)
 714                 return ret;
 715
 716         /* DVC */
 717         ret = rsnd_path_parse(priv, io, dvc);
 718         if (ret < 0)
 719                 return ret;
 720
 721         return ret;
 722 }
 723
 724 static void rsnd_of_parse_dai(struct platform_device *pdev,
 725                               const struct rsnd_of_data *of_data,
 726                               struct rsnd_priv *priv)
 727 {
 728         struct device_node *dai_node,   *dai_np;
 729         struct device_node *ssi_node,   *ssi_np;
 730         struct device_node *src_node,   *src_np;
 731         struct device_node *dvc_node,   *dvc_np;
 732         struct device_node *playback, *capture;
 733         struct rsnd_dai_platform_info *dai_info;
 734         struct rcar_snd_info *info = rsnd_priv_to_info(priv);
 735         struct device *dev = &pdev->dev;
 736         int nr, i;
 737         int dai_i, ssi_i, src_i, dvc_i;
 738
 739         if (!of_data)
 740                 return;
 741
 742         dai_node = of_get_child_by_name(dev->of_node, "rcar_sound,dai");
 743         if (!dai_node)
 744                 return;
 745
 746         nr = of_get_child_count(dai_node);
 747         if (!nr)
 748                 return;
 749
 750         dai_info = devm_kzalloc(dev,
 751                                 sizeof(struct rsnd_dai_platform_info) * nr,
 752                                 GFP_KERNEL);
 753         if (!dai_info) {
 754                 dev_err(dev, "dai info allocation error\n");
 755                 return;
 756         }
 757
 758         info->dai_info_nr       = nr;
 759         info->dai_info          = dai_info;
 760
 761         ssi_node = of_get_child_by_name(dev->of_node, "rcar_sound,ssi");
 762         src_node = of_get_child_by_name(dev->of_node, "rcar_sound,src");
 763         dvc_node = of_get_child_by_name(dev->of_node, "rcar_sound,dvc");
 764
 765 #define mod_parse(name)                                                 \
 766 if (name##_node) {                                                      \
 767         struct rsnd_##name##_platform_info *name##_info;                \
 768                                                                         \
 769         name##_i = 0;                                                   \
 770         for_each_child_of_node(name##_node, name##_np) {                \
 771                 name##_info = info->name##_info + name##_i;             \
 772                                                                         \
 773                 if (name##_np == playback)                              \
 774                         dai_info->playback.name = name##_info;          \
 775                 if (name##_np == capture)                               \
 776                         dai_info->capture.name = name##_info;           \
 777                                                                         \
 778                 name##_i++;                                             \
 779         }                                                               \
 780 }
 781
 782         /*
 783          * parse all dai
 784          */
 785         dai_i = 0;
 786         for_each_child_of_node(dai_node, dai_np) {
 787                 dai_info = info->dai_info + dai_i;
 788
 789                 for (i = 0;; i++) {
 790
 791                         playback = of_parse_phandle(dai_np, "playback", i);
 792                         capture  = of_parse_phandle(dai_np, "capture", i);
 793
 794                         if (!playback && !capture)
 795                                 break;
 796
 797                         mod_parse(ssi);
 798                         mod_parse(src);
 799                         mod_parse(dvc);
 800
 801                         of_node_put(playback);
 802                         of_node_put(capture);
 803                 }
 804
 805                 dai_i++;
 806         }
 807 }
 808
 809 static int rsnd_dai_probe(struct platform_device *pdev,
 810                           const struct rsnd_of_data *of_data,
 811                           struct rsnd_priv *priv)
 812 {
 813         struct snd_soc_dai_driver *drv;
 814         struct rcar_snd_info *info = rsnd_priv_to_info(priv);
 815         struct rsnd_dai *rdai;
 816         struct rsnd_ssi_platform_info *pmod, *cmod;
 817         struct device *dev = rsnd_priv_to_dev(priv);
 818         int dai_nr;
 819         int i;
 820
 821         rsnd_of_parse_dai(pdev, of_data, priv);
 822
 823         dai_nr = info->dai_info_nr;
 824         if (!dai_nr) {
 825                 dev_err(dev, "no dai\n");
 826                 return -EIO;
 827         }
 828
 829         drv  = devm_kzalloc(dev, sizeof(*drv)  * dai_nr, GFP_KERNEL);
 830         rdai = devm_kzalloc(dev, sizeof(*rdai) * dai_nr, GFP_KERNEL);
 831         if (!drv || !rdai) {
 832                 dev_err(dev, "dai allocate failed\n");
 833                 return -ENOMEM;
 834         }
 835
 836         priv->rdai_nr   = dai_nr;
 837         priv->daidrv    = drv;
 838         priv->rdai      = rdai;
 839
 840         for (i = 0; i < dai_nr; i++) {
 841                 rdai[i].info = &info->dai_info[i];
 842
 843                 pmod = rdai[i].info->playback.ssi;
 844                 cmod = rdai[i].info->capture.ssi;
 845
 846                 /*
 847                  *      init rsnd_dai
 848                  */
 849                 snprintf(rdai[i].name, RSND_DAI_NAME_SIZE, "rsnd-dai.%d", i);
 850
 851                 /*
 852                  *      init snd_soc_dai_driver
 853                  */
 854                 drv[i].name     = rdai[i].name;
 855                 drv[i].ops      = &rsnd_soc_dai_ops;
 856                 if (pmod) {
 857                         drv[i].playback.rates           = RSND_RATES;
 858                         drv[i].playback.formats         = RSND_FMTS;
 859                         drv[i].playback.channels_min    = 2;
 860                         drv[i].playback.channels_max    = 2;
 861
 862                         rdai[i].playback.info = &info->dai_info[i].playback;
 863                         rsnd_path_init(priv, &rdai[i], &rdai[i].playback);
 864                 }
 865                 if (cmod) {
 866                         drv[i].capture.rates            = RSND_RATES;
 867                         drv[i].capture.formats          = RSND_FMTS;
 868                         drv[i].capture.channels_min     = 2;
 869                         drv[i].capture.channels_max     = 2;
 870
 871                         rdai[i].capture.info = &info->dai_info[i].capture;
 872                         rsnd_path_init(priv, &rdai[i], &rdai[i].capture);
 873                 }
 874
 875                 dev_dbg(dev, "%s (%s/%s)\n", rdai[i].name,
 876                         pmod ? "play"    : " -- ",
 877                         cmod ? "capture" : "  --   ");
 878         }
 879
 880         return 0;
 881 }
 882
 883 /*
 884  *              pcm ops
 885  */
 886 static struct snd_pcm_hardware rsnd_pcm_hardware = {
 887         .info =         SNDRV_PCM_INFO_INTERLEAVED      |
 888                         SNDRV_PCM_INFO_MMAP             |
 889                         SNDRV_PCM_INFO_MMAP_VALID,
 890         .buffer_bytes_max       = 64 * 1024,
 891         .period_bytes_min       = 32,
 892         .period_bytes_max       = 8192,
 893         .periods_min            = 1,
 894         .periods_max            = 32,
 895         .fifo_size              = 256,
 896 };
 897
 898 static int rsnd_pcm_open(struct snd_pcm_substream *substream)
 899 {
 900         struct snd_pcm_runtime *runtime = substream->runtime;
 901         int ret = 0;
 902
 903         snd_soc_set_runtime_hwparams(substream, &rsnd_pcm_hardware);
 904
 905         ret = snd_pcm_hw_constraint_integer(runtime,
 906                                             SNDRV_PCM_HW_PARAM_PERIODS);
 907
 908         return ret;
 909 }
 910
 911 static int rsnd_hw_params(struct snd_pcm_substream *substream,
 912                          struct snd_pcm_hw_params *hw_params)
 913 {
 914         return snd_pcm_lib_malloc_pages(substream,
 915                                         params_buffer_bytes(hw_params));
 916 }
 917
 918 static snd_pcm_uframes_t rsnd_pointer(struct snd_pcm_substream *substream)
 919 {
 920         struct snd_pcm_runtime *runtime = substream->runtime;
 921         struct snd_soc_dai *dai = rsnd_substream_to_dai(substream);
 922         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
 923         struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream);
 924
 925         return bytes_to_frames(runtime, io->byte_pos);
 926 }
 927
 928 static struct snd_pcm_ops rsnd_pcm_ops = {
 929         .open           = rsnd_pcm_open,
 930         .ioctl          = snd_pcm_lib_ioctl,
 931         .hw_params      = rsnd_hw_params,
 932         .hw_free        = snd_pcm_lib_free_pages,
 933         .pointer        = rsnd_pointer,
 934 };
 935
 936 /*
 937  *              snd_soc_platform
 938  */
 939
 940 #define PREALLOC_BUFFER         (32 * 1024)
 941 #define PREALLOC_BUFFER_MAX     (32 * 1024)
 942
 943 static int rsnd_pcm_new(struct snd_soc_pcm_runtime *rtd)
 944 {
 945         struct snd_soc_dai *dai = rtd->cpu_dai;
 946         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
 947         int ret;
 948
 949         ret = rsnd_dai_call(pcm_new, &rdai->playback, rdai, rtd);
 950         if (ret)
 951                 return ret;
 952
 953         ret = rsnd_dai_call(pcm_new, &rdai->capture, rdai, rtd);
 954         if (ret)
 955                 return ret;
 956
 957         return snd_pcm_lib_preallocate_pages_for_all(
 958                 rtd->pcm,
 959                 SNDRV_DMA_TYPE_DEV,
 960                 rtd->card->snd_card->dev,
 961                 PREALLOC_BUFFER, PREALLOC_BUFFER_MAX);
 962 }
 963
 964 static void rsnd_pcm_free(struct snd_pcm *pcm)
 965 {
 966         snd_pcm_lib_preallocate_free_for_all(pcm);
 967 }
 968
 969 static struct snd_soc_platform_driver rsnd_soc_platform = {
 970         .ops            = &rsnd_pcm_ops,
 971         .pcm_new        = rsnd_pcm_new,
 972         .pcm_free       = rsnd_pcm_free,
 973 };
 974
 975 static const struct snd_soc_component_driver rsnd_soc_component = {
 976         .name           = "rsnd",
 977 };
 978
 979 /*
 980  *      rsnd probe
 981  */
 982 static int rsnd_probe(struct platform_device *pdev)
 983 {
 984         struct rcar_snd_info *info;
 985         struct rsnd_priv *priv;
 986         struct device *dev = &pdev->dev;
 987         struct rsnd_dai *rdai;
 988         const struct of_device_id *of_id = of_match_device(rsnd_of_match, dev);
 989         const struct rsnd_of_data *of_data;
 990         int (*probe_func[])(struct platform_device *pdev,
 991                             const struct rsnd_of_data *of_data,
 992                             struct rsnd_priv *priv) = {
 993                 rsnd_gen_probe,
 994                 rsnd_ssi_probe,
 995                 rsnd_src_probe,
 996                 rsnd_dvc_probe,
 997                 rsnd_adg_probe,
 998                 rsnd_dai_probe,
 999         };
1000         int ret, i;
1001
1002         info = NULL;
1003         of_data = NULL;
1004         if (of_id) {
1005                 info = devm_kzalloc(&pdev->dev,
1006                                     sizeof(struct rcar_snd_info), GFP_KERNEL);
1007                 of_data = of_id->data;
1008         } else {
1009                 info = pdev->dev.platform_data;
1010         }
1011
1012         if (!info) {
1013                 dev_err(dev, "driver needs R-Car sound information\n");
1014                 return -ENODEV;
1015         }
1016
1017         /*
1018          *      init priv data
1019          */
1020         priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
1021         if (!priv) {
1022                 dev_err(dev, "priv allocate failed\n");
1023                 return -ENODEV;
1024         }
1025
1026         priv->pdev      = pdev;
1027         priv->info      = info;
1028         spin_lock_init(&priv->lock);
1029
1030         /*
1031          *      init each module
1032          */
1033         for (i = 0; i < ARRAY_SIZE(probe_func); i++) {
1034                 ret = probe_func[i](pdev, of_data, priv);
1035                 if (ret)
1036                         return ret;
1037         }
1038
1039         for_each_rsnd_dai(rdai, priv, i) {
1040                 ret = rsnd_dai_call(probe, &rdai->playback, rdai);
1041                 if (ret)
1042                         goto exit_snd_probe;
1043
1044                 ret = rsnd_dai_call(probe, &rdai->capture, rdai);
1045                 if (ret)
1046                         goto exit_snd_probe;
1047         }
1048
1049         /*
1050          *      asoc register
1051          */
1052         ret = snd_soc_register_platform(dev, &rsnd_soc_platform);
1053         if (ret < 0) {
1054                 dev_err(dev, "cannot snd soc register\n");
1055                 return ret;
1056         }
1057
1058         ret = snd_soc_register_component(dev, &rsnd_soc_component,
1059                                          priv->daidrv, rsnd_rdai_nr(priv));
1060         if (ret < 0) {
1061                 dev_err(dev, "cannot snd dai register\n");
1062                 goto exit_snd_soc;
1063         }
1064
1065         dev_set_drvdata(dev, priv);
1066
1067         pm_runtime_enable(dev);
1068
1069         dev_info(dev, "probed\n");
1070         return ret;
1071
1072 exit_snd_soc:
1073         snd_soc_unregister_platform(dev);
1074 exit_snd_probe:
1075         for_each_rsnd_dai(rdai, priv, i) {
1076                 rsnd_dai_call(remove, &rdai->playback, rdai);
1077                 rsnd_dai_call(remove, &rdai->capture, rdai);
1078         }
1079
1080         return ret;
1081 }
1082
1083 static int rsnd_remove(struct platform_device *pdev)
1084 {
1085         struct rsnd_priv *priv = dev_get_drvdata(&pdev->dev);
1086         struct rsnd_dai *rdai;
1087         int ret = 0, i;
1088
1089         pm_runtime_disable(&pdev->dev);
1090
1091         for_each_rsnd_dai(rdai, priv, i) {
1092                 ret |= rsnd_dai_call(remove, &rdai->playback, rdai);
1093                 ret |= rsnd_dai_call(remove, &rdai->capture, rdai);
1094         }
1095
1096         return ret;
1097 }
1098
1099 static struct platform_driver rsnd_driver = {
1100         .driver = {
1101                 .name   = "rcar_sound",
1102                 .of_match_table = rsnd_of_match,
1103         },
1104         .probe          = rsnd_probe,
1105         .remove         = rsnd_remove,
1106 };
1107 module_platform_driver(rsnd_driver);
1108
1109 MODULE_LICENSE("GPL");
1110 MODULE_DESCRIPTION("Renesas R-Car audio driver");
1111 MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");
1112 MODULE_ALIAS("platform:rcar-pcm-audio");