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  *      rsnd_dai functions
 314  */
 315 #define __rsnd_mod_call(mod, func, rdai, io)                    \
 316 ({                                                              \
 317         struct rsnd_priv *priv = rsnd_mod_to_priv(mod);         \
 318         struct device *dev = rsnd_priv_to_dev(priv);            \
 319         dev_dbg(dev, "%s [%d] %s\n",                            \
 320                 rsnd_mod_name(mod), rsnd_mod_id(mod), #func);   \
 321         (mod)->ops->func(mod, rdai, io);                        \
 322 })
 323
 324 #define rsnd_mod_call(mod, func, rdai, io)      \
 325         (!(mod) ? -ENODEV :                     \
 326          !((mod)->ops->func) ? 0 :              \
 327          __rsnd_mod_call(mod, func, (rdai), (io)))
 328
 329 #define rsnd_dai_call(rdai, io, fn)                             \
 330 ({                                                              \
 331         struct rsnd_mod *mod;                                   \
 332         int ret = 0, i;                                         \
 333         for (i = 0; i < RSND_MOD_MAX; i++) {                    \
 334                 mod = (io)->mod[i];                             \
 335                 if (!mod)                                       \
 336                         continue;                               \
 337                 ret = rsnd_mod_call(mod, fn, (rdai), (io));     \
 338                 if (ret < 0)                                    \
 339                         break;                                  \
 340         }                                                       \
 341         ret;                                                    \
 342 })
 343
 344 static int rsnd_dai_connect(struct rsnd_mod *mod,
 345                             struct rsnd_dai_stream *io)
 346 {
 347         if (!mod)
 348                 return -EIO;
 349
 350         if (io->mod[mod->type]) {
 351                 struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
 352                 struct device *dev = rsnd_priv_to_dev(priv);
 353
 354                 dev_err(dev, "%s%d is not empty\n",
 355                         rsnd_mod_name(mod),
 356                         rsnd_mod_id(mod));
 357                 return -EIO;
 358         }
 359
 360         io->mod[mod->type] = mod;
 361         mod->io = io;
 362
 363         return 0;
 364 }
 365
 366 int rsnd_dai_id(struct rsnd_priv *priv, struct rsnd_dai *rdai)
 367 {
 368         int id = rdai - priv->rdai;
 369
 370         if ((id < 0) || (id >= rsnd_rdai_nr(priv)))
 371                 return -EINVAL;
 372
 373         return id;
 374 }
 375
 376 struct rsnd_dai *rsnd_dai_get(struct rsnd_priv *priv, int id)
 377 {
 378         if ((id < 0) || (id >= rsnd_rdai_nr(priv)))
 379                 return NULL;
 380
 381         return priv->rdai + id;
 382 }
 383
 384 static struct rsnd_dai *rsnd_dai_to_rdai(struct snd_soc_dai *dai)
 385 {
 386         struct rsnd_priv *priv = snd_soc_dai_get_drvdata(dai);
 387
 388         return rsnd_dai_get(priv, dai->id);
 389 }
 390
 391 int rsnd_dai_is_play(struct rsnd_dai *rdai, struct rsnd_dai_stream *io)
 392 {
 393         return &rdai->playback == io;
 394 }
 395
 396 /*
 397  *      rsnd_soc_dai functions
 398  */
 399 int rsnd_dai_pointer_offset(struct rsnd_dai_stream *io, int additional)
 400 {
 401         struct snd_pcm_substream *substream = io->substream;
 402         struct snd_pcm_runtime *runtime = substream->runtime;
 403         int pos = io->byte_pos + additional;
 404
 405         pos %= (runtime->periods * io->byte_per_period);
 406
 407         return pos;
 408 }
 409
 410 void rsnd_dai_pointer_update(struct rsnd_dai_stream *io, int byte)
 411 {
 412         io->byte_pos += byte;
 413
 414         if (io->byte_pos >= io->next_period_byte) {
 415                 struct snd_pcm_substream *substream = io->substream;
 416                 struct snd_pcm_runtime *runtime = substream->runtime;
 417
 418                 io->period_pos++;
 419                 io->next_period_byte += io->byte_per_period;
 420
 421                 if (io->period_pos >= runtime->periods) {
 422                         io->byte_pos = 0;
 423                         io->period_pos = 0;
 424                         io->next_period_byte = io->byte_per_period;
 425                 }
 426
 427                 snd_pcm_period_elapsed(substream);
 428         }
 429 }
 430
 431 static int rsnd_dai_stream_init(struct rsnd_dai_stream *io,
 432                                 struct snd_pcm_substream *substream)
 433 {
 434         struct snd_pcm_runtime *runtime = substream->runtime;
 435
 436         io->substream           = substream;
 437         io->byte_pos            = 0;
 438         io->period_pos          = 0;
 439         io->byte_per_period     = runtime->period_size *
 440                                   runtime->channels *
 441                                   samples_to_bytes(runtime, 1);
 442         io->next_period_byte    = io->byte_per_period;
 443
 444         return 0;
 445 }
 446
 447 static
 448 struct snd_soc_dai *rsnd_substream_to_dai(struct snd_pcm_substream *substream)
 449 {
 450         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 451
 452         return  rtd->cpu_dai;
 453 }
 454
 455 static
 456 struct rsnd_dai_stream *rsnd_rdai_to_io(struct rsnd_dai *rdai,
 457                                         struct snd_pcm_substream *substream)
 458 {
 459         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 460                 return &rdai->playback;
 461         else
 462                 return &rdai->capture;
 463 }
 464
 465 static int rsnd_soc_dai_trigger(struct snd_pcm_substream *substream, int cmd,
 466                             struct snd_soc_dai *dai)
 467 {
 468         struct rsnd_priv *priv = snd_soc_dai_get_drvdata(dai);
 469         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
 470         struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream);
 471         struct rsnd_mod *mod = rsnd_ssi_mod_get_frm_dai(priv,
 472                                                 rsnd_dai_id(priv, rdai),
 473                                                 rsnd_dai_is_play(rdai, io));
 474         int ssi_id = rsnd_mod_id(mod);
 475         int ret;
 476         unsigned long flags;
 477
 478         rsnd_lock(priv, flags);
 479
 480         switch (cmd) {
 481         case SNDRV_PCM_TRIGGER_START:
 482                 ret = rsnd_dai_stream_init(io, substream);
 483                 if (ret < 0)
 484                         goto dai_trigger_end;
 485
 486                 ret = rsnd_platform_call(priv, dai, start, ssi_id);
 487                 if (ret < 0)
 488                         goto dai_trigger_end;
 489
 490                 ret = rsnd_dai_call(rdai, io, init);
 491                 if (ret < 0)
 492                         goto dai_trigger_end;
 493
 494                 ret = rsnd_dai_call(rdai, io, start);
 495                 if (ret < 0)
 496                         goto dai_trigger_end;
 497                 break;
 498         case SNDRV_PCM_TRIGGER_STOP:
 499                 ret = rsnd_dai_call(rdai, io, stop);
 500                 if (ret < 0)
 501                         goto dai_trigger_end;
 502
 503                 ret = rsnd_dai_call(rdai, io, quit);
 504                 if (ret < 0)
 505                         goto dai_trigger_end;
 506
 507                 ret = rsnd_platform_call(priv, dai, stop, ssi_id);
 508                 if (ret < 0)
 509                         goto dai_trigger_end;
 510                 break;
 511         default:
 512                 ret = -EINVAL;
 513         }
 514
 515 dai_trigger_end:
 516         rsnd_unlock(priv, flags);
 517
 518         return ret;
 519 }
 520
 521 static int rsnd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
 522 {
 523         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
 524
 525         /* set master/slave audio interface */
 526         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 527         case SND_SOC_DAIFMT_CBM_CFM:
 528                 rdai->clk_master = 0;
 529                 break;
 530         case SND_SOC_DAIFMT_CBS_CFS:
 531                 rdai->clk_master = 1; /* codec is slave, cpu is master */
 532                 break;
 533         default:
 534                 return -EINVAL;
 535         }
 536
 537         /* set clock inversion */
 538         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
 539         case SND_SOC_DAIFMT_NB_IF:
 540                 rdai->bit_clk_inv = 0;
 541                 rdai->frm_clk_inv = 1;
 542                 break;
 543         case SND_SOC_DAIFMT_IB_NF:
 544                 rdai->bit_clk_inv = 1;
 545                 rdai->frm_clk_inv = 0;
 546                 break;
 547         case SND_SOC_DAIFMT_IB_IF:
 548                 rdai->bit_clk_inv = 1;
 549                 rdai->frm_clk_inv = 1;
 550                 break;
 551         case SND_SOC_DAIFMT_NB_NF:
 552         default:
 553                 rdai->bit_clk_inv = 0;
 554                 rdai->frm_clk_inv = 0;
 555                 break;
 556         }
 557
 558         /* set format */
 559         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 560         case SND_SOC_DAIFMT_I2S:
 561                 rdai->sys_delay = 0;
 562                 rdai->data_alignment = 0;
 563                 break;
 564         case SND_SOC_DAIFMT_LEFT_J:
 565                 rdai->sys_delay = 1;
 566                 rdai->data_alignment = 0;
 567                 break;
 568         case SND_SOC_DAIFMT_RIGHT_J:
 569                 rdai->sys_delay = 1;
 570                 rdai->data_alignment = 1;
 571                 break;
 572         }
 573
 574         return 0;
 575 }
 576
 577 static const struct snd_soc_dai_ops rsnd_soc_dai_ops = {
 578         .trigger        = rsnd_soc_dai_trigger,
 579         .set_fmt        = rsnd_soc_dai_set_fmt,
 580 };
 581
 582 static int rsnd_path_init(struct rsnd_priv *priv,
 583                           struct rsnd_dai *rdai,
 584                           struct rsnd_dai_stream *io)
 585 {
 586         struct rsnd_mod *mod;
 587         struct rsnd_dai_platform_info *dai_info = rdai->info;
 588         int ret;
 589         int ssi_id = -1;
 590         int src_id = -1;
 591
 592         /*
 593          * Gen1 is created by SRU/SSI, and this SRU is base module of
 594          * Gen2's SCU/SSIU/SSI. (Gen2 SCU/SSIU came from SRU)
 595          *
 596          * Easy image is..
 597          *      Gen1 SRU = Gen2 SCU + SSIU + etc
 598          *
 599          * Gen2 SCU path is very flexible, but, Gen1 SRU (SCU parts) is
 600          * using fixed path.
 601          */
 602         if (dai_info) {
 603                 if (rsnd_is_enable_path(io, ssi))
 604                         ssi_id = rsnd_info_id(priv, io, ssi);
 605                 if (rsnd_is_enable_path(io, src))
 606                         src_id = rsnd_info_id(priv, io, src);
 607         } else {
 608                 /* get SSI's ID */
 609                 mod = rsnd_ssi_mod_get_frm_dai(priv,
 610                                                rsnd_dai_id(priv, rdai),
 611                                                rsnd_dai_is_play(rdai, io));
 612                 if (!mod)
 613                         return 0;
 614                 ssi_id = src_id = rsnd_mod_id(mod);
 615         }
 616
 617         ret = 0;
 618
 619         /* SRC */
 620         if (src_id >= 0) {
 621                 mod = rsnd_src_mod_get(priv, src_id);
 622                 ret = rsnd_dai_connect(mod, io);
 623                 if (ret < 0)
 624                         return ret;
 625         }
 626
 627         /* SSI */
 628         if (ssi_id >= 0) {
 629                 mod = rsnd_ssi_mod_get(priv, ssi_id);
 630                 ret = rsnd_dai_connect(mod, io);
 631                 if (ret < 0)
 632                         return ret;
 633         }
 634
 635         return ret;
 636 }
 637
 638 static void rsnd_of_parse_dai(struct platform_device *pdev,
 639                               const struct rsnd_of_data *of_data,
 640                               struct rsnd_priv *priv)
 641 {
 642         struct device_node *dai_node,   *dai_np;
 643         struct device_node *ssi_node,   *ssi_np;
 644         struct device_node *src_node,   *src_np;
 645         struct device_node *playback, *capture;
 646         struct rsnd_dai_platform_info *dai_info;
 647         struct rcar_snd_info *info = rsnd_priv_to_info(priv);
 648         struct device *dev = &pdev->dev;
 649         int nr, i;
 650         int dai_i, ssi_i, src_i;
 651
 652         if (!of_data)
 653                 return;
 654
 655         dai_node = of_get_child_by_name(dev->of_node, "rcar_sound,dai");
 656         if (!dai_node)
 657                 return;
 658
 659         nr = of_get_child_count(dai_node);
 660         if (!nr)
 661                 return;
 662
 663         dai_info = devm_kzalloc(dev,
 664                                 sizeof(struct rsnd_dai_platform_info) * nr,
 665                                 GFP_KERNEL);
 666         if (!dai_info) {
 667                 dev_err(dev, "dai info allocation error\n");
 668                 return;
 669         }
 670
 671         info->dai_info_nr       = nr;
 672         info->dai_info          = dai_info;
 673
 674         ssi_node = of_get_child_by_name(dev->of_node, "rcar_sound,ssi");
 675         src_node = of_get_child_by_name(dev->of_node, "rcar_sound,src");
 676
 677 #define mod_parse(name)                                                 \
 678 if (name##_node) {                                                      \
 679         struct rsnd_##name##_platform_info *name##_info;                \
 680                                                                         \
 681         name##_i = 0;                                                   \
 682         for_each_child_of_node(name##_node, name##_np) {                \
 683                 name##_info = info->name##_info + name##_i;             \
 684                                                                         \
 685                 if (name##_np == playback)                              \
 686                         dai_info->playback.name = name##_info;          \
 687                 if (name##_np == capture)                               \
 688                         dai_info->capture.name = name##_info;           \
 689                                                                         \
 690                 name##_i++;                                             \
 691         }                                                               \
 692 }
 693
 694         /*
 695          * parse all dai
 696          */
 697         dai_i = 0;
 698         for_each_child_of_node(dai_node, dai_np) {
 699                 dai_info = info->dai_info + dai_i;
 700
 701                 for (i = 0;; i++) {
 702
 703                         playback = of_parse_phandle(dai_np, "playback", i);
 704                         capture  = of_parse_phandle(dai_np, "capture", i);
 705
 706                         if (!playback && !capture)
 707                                 break;
 708
 709                         mod_parse(ssi);
 710                         mod_parse(src);
 711
 712                         if (playback)
 713                                 of_node_put(playback);
 714                         if (capture)
 715                                 of_node_put(capture);
 716                 }
 717
 718                 dai_i++;
 719         }
 720 }
 721
 722 static int rsnd_dai_probe(struct platform_device *pdev,
 723                           const struct rsnd_of_data *of_data,
 724                           struct rsnd_priv *priv)
 725 {
 726         struct snd_soc_dai_driver *drv;
 727         struct rcar_snd_info *info = rsnd_priv_to_info(priv);
 728         struct rsnd_dai *rdai;
 729         struct rsnd_mod *pmod, *cmod;
 730         struct device *dev = rsnd_priv_to_dev(priv);
 731         int dai_nr;
 732         int i;
 733
 734         rsnd_of_parse_dai(pdev, of_data, priv);
 735
 736         /*
 737          * dai_nr should be set via dai_info_nr,
 738          * but allow it to keeping compatible
 739          */
 740         dai_nr = info->dai_info_nr;
 741         if (!dai_nr) {
 742                 /* get max dai nr */
 743                 for (dai_nr = 0; dai_nr < 32; dai_nr++) {
 744                         pmod = rsnd_ssi_mod_get_frm_dai(priv, dai_nr, 1);
 745                         cmod = rsnd_ssi_mod_get_frm_dai(priv, dai_nr, 0);
 746
 747                         if (!pmod && !cmod)
 748                                 break;
 749                 }
 750         }
 751
 752         if (!dai_nr) {
 753                 dev_err(dev, "no dai\n");
 754                 return -EIO;
 755         }
 756
 757         drv  = devm_kzalloc(dev, sizeof(*drv)  * dai_nr, GFP_KERNEL);
 758         rdai = devm_kzalloc(dev, sizeof(*rdai) * dai_nr, GFP_KERNEL);
 759         if (!drv || !rdai) {
 760                 dev_err(dev, "dai allocate failed\n");
 761                 return -ENOMEM;
 762         }
 763
 764         priv->rdai_nr   = dai_nr;
 765         priv->daidrv    = drv;
 766         priv->rdai      = rdai;
 767
 768         for (i = 0; i < dai_nr; i++) {
 769                 if (info->dai_info)
 770                         rdai[i].info = &info->dai_info[i];
 771
 772                 pmod = rsnd_ssi_mod_get_frm_dai(priv, i, 1);
 773                 cmod = rsnd_ssi_mod_get_frm_dai(priv, i, 0);
 774
 775                 /*
 776                  *      init rsnd_dai
 777                  */
 778                 snprintf(rdai[i].name, RSND_DAI_NAME_SIZE, "rsnd-dai.%d", i);
 779
 780                 /*
 781                  *      init snd_soc_dai_driver
 782                  */
 783                 drv[i].name     = rdai[i].name;
 784                 drv[i].ops      = &rsnd_soc_dai_ops;
 785                 if (pmod) {
 786                         drv[i].playback.rates           = RSND_RATES;
 787                         drv[i].playback.formats         = RSND_FMTS;
 788                         drv[i].playback.channels_min    = 2;
 789                         drv[i].playback.channels_max    = 2;
 790
 791                         if (info->dai_info)
 792                                 rdai[i].playback.info = &info->dai_info[i].playback;
 793                         rsnd_path_init(priv, &rdai[i], &rdai[i].playback);
 794                 }
 795                 if (cmod) {
 796                         drv[i].capture.rates            = RSND_RATES;
 797                         drv[i].capture.formats          = RSND_FMTS;
 798                         drv[i].capture.channels_min     = 2;
 799                         drv[i].capture.channels_max     = 2;
 800
 801                         if (info->dai_info)
 802                                 rdai[i].capture.info = &info->dai_info[i].capture;
 803                         rsnd_path_init(priv, &rdai[i], &rdai[i].capture);
 804                 }
 805
 806                 dev_dbg(dev, "%s (%s/%s)\n", rdai[i].name,
 807                         pmod ? "play"    : " -- ",
 808                         cmod ? "capture" : "  --   ");
 809         }
 810
 811         return 0;
 812 }
 813
 814 /*
 815  *              pcm ops
 816  */
 817 static struct snd_pcm_hardware rsnd_pcm_hardware = {
 818         .info =         SNDRV_PCM_INFO_INTERLEAVED      |
 819                         SNDRV_PCM_INFO_MMAP             |
 820                         SNDRV_PCM_INFO_MMAP_VALID       |
 821                         SNDRV_PCM_INFO_PAUSE,
 822         .buffer_bytes_max       = 64 * 1024,
 823         .period_bytes_min       = 32,
 824         .period_bytes_max       = 8192,
 825         .periods_min            = 1,
 826         .periods_max            = 32,
 827         .fifo_size              = 256,
 828 };
 829
 830 static int rsnd_pcm_open(struct snd_pcm_substream *substream)
 831 {
 832         struct snd_pcm_runtime *runtime = substream->runtime;
 833         int ret = 0;
 834
 835         snd_soc_set_runtime_hwparams(substream, &rsnd_pcm_hardware);
 836
 837         ret = snd_pcm_hw_constraint_integer(runtime,
 838                                             SNDRV_PCM_HW_PARAM_PERIODS);
 839
 840         return ret;
 841 }
 842
 843 static int rsnd_hw_params(struct snd_pcm_substream *substream,
 844                          struct snd_pcm_hw_params *hw_params)
 845 {
 846         return snd_pcm_lib_malloc_pages(substream,
 847                                         params_buffer_bytes(hw_params));
 848 }
 849
 850 static snd_pcm_uframes_t rsnd_pointer(struct snd_pcm_substream *substream)
 851 {
 852         struct snd_pcm_runtime *runtime = substream->runtime;
 853         struct snd_soc_dai *dai = rsnd_substream_to_dai(substream);
 854         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
 855         struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream);
 856
 857         return bytes_to_frames(runtime, io->byte_pos);
 858 }
 859
 860 static struct snd_pcm_ops rsnd_pcm_ops = {
 861         .open           = rsnd_pcm_open,
 862         .ioctl          = snd_pcm_lib_ioctl,
 863         .hw_params      = rsnd_hw_params,
 864         .hw_free        = snd_pcm_lib_free_pages,
 865         .pointer        = rsnd_pointer,
 866 };
 867
 868 /*
 869  *              snd_soc_platform
 870  */
 871
 872 #define PREALLOC_BUFFER         (32 * 1024)
 873 #define PREALLOC_BUFFER_MAX     (32 * 1024)
 874
 875 static int rsnd_pcm_new(struct snd_soc_pcm_runtime *rtd)
 876 {
 877         return snd_pcm_lib_preallocate_pages_for_all(
 878                 rtd->pcm,
 879                 SNDRV_DMA_TYPE_DEV,
 880                 rtd->card->snd_card->dev,
 881                 PREALLOC_BUFFER, PREALLOC_BUFFER_MAX);
 882 }
 883
 884 static void rsnd_pcm_free(struct snd_pcm *pcm)
 885 {
 886         snd_pcm_lib_preallocate_free_for_all(pcm);
 887 }
 888
 889 static struct snd_soc_platform_driver rsnd_soc_platform = {
 890         .ops            = &rsnd_pcm_ops,
 891         .pcm_new        = rsnd_pcm_new,
 892         .pcm_free       = rsnd_pcm_free,
 893 };
 894
 895 static const struct snd_soc_component_driver rsnd_soc_component = {
 896         .name           = "rsnd",
 897 };
 898
 899 /*
 900  *      rsnd probe
 901  */
 902 static int rsnd_probe(struct platform_device *pdev)
 903 {
 904         struct rcar_snd_info *info;
 905         struct rsnd_priv *priv;
 906         struct device *dev = &pdev->dev;
 907         struct rsnd_dai *rdai;
 908         const struct of_device_id *of_id = of_match_device(rsnd_of_match, dev);
 909         const struct rsnd_of_data *of_data;
 910         int (*probe_func[])(struct platform_device *pdev,
 911                             const struct rsnd_of_data *of_data,
 912                             struct rsnd_priv *priv) = {
 913                 rsnd_gen_probe,
 914                 rsnd_ssi_probe,
 915                 rsnd_src_probe,
 916                 rsnd_adg_probe,
 917                 rsnd_dai_probe,
 918         };
 919         int ret, i;
 920
 921         info = NULL;
 922         of_data = NULL;
 923         if (of_id) {
 924                 info = devm_kzalloc(&pdev->dev,
 925                                     sizeof(struct rcar_snd_info), GFP_KERNEL);
 926                 of_data = of_id->data;
 927         } else {
 928                 info = pdev->dev.platform_data;
 929         }
 930
 931         if (!info) {
 932                 dev_err(dev, "driver needs R-Car sound information\n");
 933                 return -ENODEV;
 934         }
 935
 936         /*
 937          *      init priv data
 938          */
 939         priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
 940         if (!priv) {
 941                 dev_err(dev, "priv allocate failed\n");
 942                 return -ENODEV;
 943         }
 944
 945         priv->dev       = dev;
 946         priv->info      = info;
 947         spin_lock_init(&priv->lock);
 948
 949         /*
 950          *      init each module
 951          */
 952         for (i = 0; i < ARRAY_SIZE(probe_func); i++) {
 953                 ret = probe_func[i](pdev, of_data, priv);
 954                 if (ret)
 955                         return ret;
 956         }
 957
 958         for_each_rsnd_dai(rdai, priv, i) {
 959                 ret = rsnd_dai_call(rdai, &rdai->playback, probe);
 960                 if (ret)
 961                         return ret;
 962
 963                 ret = rsnd_dai_call(rdai, &rdai->capture, probe);
 964                 if (ret)
 965                         return ret;
 966         }
 967
 968         /*
 969          *      asoc register
 970          */
 971         ret = snd_soc_register_platform(dev, &rsnd_soc_platform);
 972         if (ret < 0) {
 973                 dev_err(dev, "cannot snd soc register\n");
 974                 return ret;
 975         }
 976
 977         ret = snd_soc_register_component(dev, &rsnd_soc_component,
 978                                          priv->daidrv, rsnd_rdai_nr(priv));
 979         if (ret < 0) {
 980                 dev_err(dev, "cannot snd dai register\n");
 981                 goto exit_snd_soc;
 982         }
 983
 984         dev_set_drvdata(dev, priv);
 985
 986         pm_runtime_enable(dev);
 987
 988         dev_info(dev, "probed\n");
 989         return ret;
 990
 991 exit_snd_soc:
 992         snd_soc_unregister_platform(dev);
 993
 994         return ret;
 995 }
 996
 997 static int rsnd_remove(struct platform_device *pdev)
 998 {
 999         struct rsnd_priv *priv = dev_get_drvdata(&pdev->dev);
1000         struct rsnd_dai *rdai;
1001         int ret, i;
1002
1003         pm_runtime_disable(&pdev->dev);
1004
1005         for_each_rsnd_dai(rdai, priv, i) {
1006                 ret = rsnd_dai_call(rdai, &rdai->playback, remove);
1007                 if (ret)
1008                         return ret;
1009
1010                 ret = rsnd_dai_call(rdai, &rdai->capture, remove);
1011                 if (ret)
1012                         return ret;
1013         }
1014
1015         return 0;
1016 }
1017
1018 static struct platform_driver rsnd_driver = {
1019         .driver = {
1020                 .name   = "rcar_sound",
1021                 .of_match_table = rsnd_of_match,
1022         },
1023         .probe          = rsnd_probe,
1024         .remove         = rsnd_remove,
1025 };
1026 module_platform_driver(rsnd_driver);
1027
1028 MODULE_LICENSE("GPL");
1029 MODULE_DESCRIPTION("Renesas R-Car audio driver");
1030 MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");
1031 MODULE_ALIAS("platform:rcar-pcm-audio");