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 "rsnd.h"
  98
  99 #define RSND_RATES SNDRV_PCM_RATE_8000_96000
 100 #define RSND_FMTS (SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S16_LE)
 101
 102 static const struct rsnd_of_data rsnd_of_data_gen1 = {
 103         .flags = RSND_GEN1,
 104 };
 105
 106 static const struct rsnd_of_data rsnd_of_data_gen2 = {
 107         .flags = RSND_GEN2,
 108 };
 109
 110 static const struct of_device_id rsnd_of_match[] = {
 111         { .compatible = "renesas,rcar_sound-gen1", .data = &rsnd_of_data_gen1 },
 112         { .compatible = "renesas,rcar_sound-gen2", .data = &rsnd_of_data_gen2 },
 113         {},
 114 };
 115 MODULE_DEVICE_TABLE(of, rsnd_of_match);
 116
 117 /*
 118  *      rsnd_platform functions
 119  */
 120 #define rsnd_platform_call(priv, dai, func, param...)   \
 121         (!(priv->info->func) ? 0 :              \
 122          priv->info->func(param))
 123
 124 #define rsnd_is_enable_path(io, name) \
 125         ((io)->info ? (io)->info->name : NULL)
 126 #define rsnd_info_id(priv, io, name) \
 127         ((io)->info->name - priv->info->name##_info)
 128
 129 /*
 130  *      rsnd_mod functions
 131  */
 132 char *rsnd_mod_name(struct rsnd_mod *mod)
 133 {
 134         if (!mod || !mod->ops)
 135                 return "unknown";
 136
 137         return mod->ops->name;
 138 }
 139
 140 struct dma_chan *rsnd_mod_dma_req(struct rsnd_mod *mod)
 141 {
 142         if (!mod || !mod->ops || !mod->ops->dma_req)
 143                 return NULL;
 144
 145         return mod->ops->dma_req(mod);
 146 }
 147
 148 int rsnd_mod_init(struct rsnd_mod *mod,
 149                    struct rsnd_mod_ops *ops,
 150                    struct clk *clk,
 151                    enum rsnd_mod_type type,
 152                    int id)
 153 {
 154         int ret = clk_prepare(clk);
 155
 156         if (ret)
 157                 return ret;
 158
 159         mod->id         = id;
 160         mod->ops        = ops;
 161         mod->type       = type;
 162         mod->clk        = clk;
 163
 164         return ret;
 165 }
 166
 167 void rsnd_mod_quit(struct rsnd_mod *mod)
 168 {
 169         if (mod->clk)
 170                 clk_unprepare(mod->clk);
 171 }
 172
 173 int rsnd_mod_is_working(struct rsnd_mod *mod)
 174 {
 175         struct rsnd_dai_stream *io = rsnd_mod_to_io(mod);
 176
 177         /* see rsnd_dai_stream_init/quit() */
 178         return !!io->substream;
 179 }
 180
 181 /*
 182  *      settting function
 183  */
 184 u32 rsnd_get_adinr(struct rsnd_mod *mod)
 185 {
 186         struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
 187         struct rsnd_dai_stream *io = rsnd_mod_to_io(mod);
 188         struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
 189         struct device *dev = rsnd_priv_to_dev(priv);
 190         u32 adinr = runtime->channels;
 191
 192         switch (runtime->sample_bits) {
 193         case 16:
 194                 adinr |= (8 << 16);
 195                 break;
 196         case 32:
 197                 adinr |= (0 << 16);
 198                 break;
 199         default:
 200                 dev_warn(dev, "not supported sample bits\n");
 201                 return 0;
 202         }
 203
 204         return adinr;
 205 }
 206
 207 /*
 208  *      rsnd_dai functions
 209  */
 210 #define __rsnd_mod_call(mod, func, param...)                    \
 211 ({                                                              \
 212         struct rsnd_priv *priv = rsnd_mod_to_priv(mod);         \
 213         struct device *dev = rsnd_priv_to_dev(priv);            \
 214         u32 mask = 0xF << __rsnd_mod_shift_##func;                      \
 215         u8 val  = (mod->status >> __rsnd_mod_shift_##func) & 0xF;       \
 216         u8 add  = ((val + __rsnd_mod_add_##func) & 0xF);                \
 217         int ret = 0;                                                    \
 218         int called = 0;                                                 \
 219         if (val == __rsnd_mod_call_##func) {                            \
 220                 called = 1;                                             \
 221                 ret = (mod)->ops->func(mod, param);                     \
 222                 mod->status = (mod->status & ~mask) +                   \
 223                         (add << __rsnd_mod_shift_##func);               \
 224         }                                                               \
 225         dev_dbg(dev, "%s[%d] 0x%08x %s\n",                              \
 226                 rsnd_mod_name(mod), rsnd_mod_id(mod), mod->status,      \
 227                 called ? #func : "");                                   \
 228         ret;                                                            \
 229 })
 230
 231 #define rsnd_mod_call(mod, func, param...)      \
 232         (!(mod) ? -ENODEV :                     \
 233          !((mod)->ops->func) ? 0 :              \
 234          __rsnd_mod_call(mod, func, param))
 235
 236 #define rsnd_dai_call(fn, io, param...)                         \
 237 ({                                                              \
 238         struct rsnd_mod *mod;                                   \
 239         int ret = 0, i;                                         \
 240         for (i = 0; i < RSND_MOD_MAX; i++) {                    \
 241                 mod = (io)->mod[i];                             \
 242                 if (!mod)                                       \
 243                         continue;                               \
 244                 ret = rsnd_mod_call(mod, fn, param);            \
 245                 if (ret < 0)                                    \
 246                         break;                                  \
 247         }                                                       \
 248         ret;                                                    \
 249 })
 250
 251 static int rsnd_dai_connect(struct rsnd_mod *mod,
 252                             struct rsnd_dai_stream *io)
 253 {
 254         if (!mod)
 255                 return -EIO;
 256
 257         if (io->mod[mod->type]) {
 258                 struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
 259                 struct device *dev = rsnd_priv_to_dev(priv);
 260
 261                 dev_err(dev, "%s[%d] is not empty\n",
 262                         rsnd_mod_name(mod),
 263                         rsnd_mod_id(mod));
 264                 return -EIO;
 265         }
 266
 267         io->mod[mod->type] = mod;
 268         mod->io = io;
 269
 270         return 0;
 271 }
 272
 273 static void rsnd_dai_disconnect(struct rsnd_mod *mod,
 274                                 struct rsnd_dai_stream *io)
 275 {
 276         mod->io = NULL;
 277         io->mod[mod->type] = NULL;
 278 }
 279
 280 struct rsnd_dai *rsnd_rdai_get(struct rsnd_priv *priv, int id)
 281 {
 282         if ((id < 0) || (id >= rsnd_rdai_nr(priv)))
 283                 return NULL;
 284
 285         return priv->rdai + id;
 286 }
 287
 288 #define rsnd_dai_to_priv(dai) snd_soc_dai_get_drvdata(dai)
 289 static struct rsnd_dai *rsnd_dai_to_rdai(struct snd_soc_dai *dai)
 290 {
 291         struct rsnd_priv *priv = rsnd_dai_to_priv(dai);
 292
 293         return rsnd_rdai_get(priv, dai->id);
 294 }
 295
 296 /*
 297  *      rsnd_soc_dai functions
 298  */
 299 int rsnd_dai_pointer_offset(struct rsnd_dai_stream *io, int additional)
 300 {
 301         struct snd_pcm_substream *substream = io->substream;
 302         struct snd_pcm_runtime *runtime = substream->runtime;
 303         int pos = io->byte_pos + additional;
 304
 305         pos %= (runtime->periods * io->byte_per_period);
 306
 307         return pos;
 308 }
 309
 310 bool rsnd_dai_pointer_update(struct rsnd_dai_stream *io, int byte)
 311 {
 312         io->byte_pos += byte;
 313
 314         if (io->byte_pos >= io->next_period_byte) {
 315                 struct snd_pcm_substream *substream = io->substream;
 316                 struct snd_pcm_runtime *runtime = substream->runtime;
 317
 318                 io->period_pos++;
 319                 io->next_period_byte += io->byte_per_period;
 320
 321                 if (io->period_pos >= runtime->periods) {
 322                         io->byte_pos = 0;
 323                         io->period_pos = 0;
 324                         io->next_period_byte = io->byte_per_period;
 325                 }
 326
 327                 return true;
 328         }
 329
 330         return false;
 331 }
 332
 333 void rsnd_dai_period_elapsed(struct rsnd_dai_stream *io)
 334 {
 335         struct snd_pcm_substream *substream = io->substream;
 336
 337         /*
 338          * this function should be called...
 339          *
 340          * - if rsnd_dai_pointer_update() returns true
 341          * - without spin lock
 342          */
 343
 344         snd_pcm_period_elapsed(substream);
 345 }
 346
 347 static void rsnd_dai_stream_init(struct rsnd_dai_stream *io,
 348                                 struct snd_pcm_substream *substream)
 349 {
 350         struct snd_pcm_runtime *runtime = substream->runtime;
 351
 352         io->substream           = substream;
 353         io->byte_pos            = 0;
 354         io->period_pos          = 0;
 355         io->byte_per_period     = runtime->period_size *
 356                                   runtime->channels *
 357                                   samples_to_bytes(runtime, 1);
 358         io->next_period_byte    = io->byte_per_period;
 359 }
 360
 361 static void rsnd_dai_stream_quit(struct rsnd_dai_stream *io)
 362 {
 363         io->substream           = NULL;
 364 }
 365
 366 static
 367 struct snd_soc_dai *rsnd_substream_to_dai(struct snd_pcm_substream *substream)
 368 {
 369         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 370
 371         return  rtd->cpu_dai;
 372 }
 373
 374 static
 375 struct rsnd_dai_stream *rsnd_rdai_to_io(struct rsnd_dai *rdai,
 376                                         struct snd_pcm_substream *substream)
 377 {
 378         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 379                 return &rdai->playback;
 380         else
 381                 return &rdai->capture;
 382 }
 383
 384 static int rsnd_soc_dai_trigger(struct snd_pcm_substream *substream, int cmd,
 385                             struct snd_soc_dai *dai)
 386 {
 387         struct rsnd_priv *priv = rsnd_dai_to_priv(dai);
 388         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
 389         struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream);
 390         int ssi_id = rsnd_mod_id(rsnd_io_to_mod_ssi(io));
 391         int ret;
 392         unsigned long flags;
 393
 394         spin_lock_irqsave(&priv->lock, flags);
 395
 396         switch (cmd) {
 397         case SNDRV_PCM_TRIGGER_START:
 398                 rsnd_dai_stream_init(io, substream);
 399
 400                 ret = rsnd_platform_call(priv, dai, start, ssi_id);
 401                 if (ret < 0)
 402                         goto dai_trigger_end;
 403
 404                 ret = rsnd_dai_call(init, io, priv);
 405                 if (ret < 0)
 406                         goto dai_trigger_end;
 407
 408                 ret = rsnd_dai_call(start, io, priv);
 409                 if (ret < 0)
 410                         goto dai_trigger_end;
 411                 break;
 412         case SNDRV_PCM_TRIGGER_STOP:
 413                 ret = rsnd_dai_call(stop, io, priv);
 414                 if (ret < 0)
 415                         goto dai_trigger_end;
 416
 417                 ret = rsnd_dai_call(quit, io, priv);
 418                 if (ret < 0)
 419                         goto dai_trigger_end;
 420
 421                 ret = rsnd_platform_call(priv, dai, stop, ssi_id);
 422                 if (ret < 0)
 423                         goto dai_trigger_end;
 424
 425                 rsnd_dai_stream_quit(io);
 426                 break;
 427         default:
 428                 ret = -EINVAL;
 429         }
 430
 431 dai_trigger_end:
 432         spin_unlock_irqrestore(&priv->lock, flags);
 433
 434         return ret;
 435 }
 436
 437 static int rsnd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
 438 {
 439         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
 440
 441         /* set master/slave audio interface */
 442         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 443         case SND_SOC_DAIFMT_CBM_CFM:
 444                 rdai->clk_master = 0;
 445                 break;
 446         case SND_SOC_DAIFMT_CBS_CFS:
 447                 rdai->clk_master = 1; /* codec is slave, cpu is master */
 448                 break;
 449         default:
 450                 return -EINVAL;
 451         }
 452
 453         /* set format */
 454         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 455         case SND_SOC_DAIFMT_I2S:
 456                 rdai->sys_delay = 0;
 457                 rdai->data_alignment = 0;
 458                 rdai->frm_clk_inv = 0;
 459                 break;
 460         case SND_SOC_DAIFMT_LEFT_J:
 461                 rdai->sys_delay = 1;
 462                 rdai->data_alignment = 0;
 463                 rdai->frm_clk_inv = 1;
 464                 break;
 465         case SND_SOC_DAIFMT_RIGHT_J:
 466                 rdai->sys_delay = 1;
 467                 rdai->data_alignment = 1;
 468                 rdai->frm_clk_inv = 1;
 469                 break;
 470         }
 471
 472         /* set clock inversion */
 473         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
 474         case SND_SOC_DAIFMT_NB_IF:
 475                 rdai->bit_clk_inv =  rdai->bit_clk_inv;
 476                 rdai->frm_clk_inv = !rdai->frm_clk_inv;
 477                 break;
 478         case SND_SOC_DAIFMT_IB_NF:
 479                 rdai->bit_clk_inv = !rdai->bit_clk_inv;
 480                 rdai->frm_clk_inv =  rdai->frm_clk_inv;
 481                 break;
 482         case SND_SOC_DAIFMT_IB_IF:
 483                 rdai->bit_clk_inv = !rdai->bit_clk_inv;
 484                 rdai->frm_clk_inv = !rdai->frm_clk_inv;
 485                 break;
 486         case SND_SOC_DAIFMT_NB_NF:
 487         default:
 488                 break;
 489         }
 490
 491         return 0;
 492 }
 493
 494 static const struct snd_soc_dai_ops rsnd_soc_dai_ops = {
 495         .trigger        = rsnd_soc_dai_trigger,
 496         .set_fmt        = rsnd_soc_dai_set_fmt,
 497 };
 498
 499 #define rsnd_path_parse(priv, io, type)                         \
 500 ({                                                              \
 501         struct rsnd_mod *mod;                                   \
 502         int ret = 0;                                            \
 503         int id = -1;                                            \
 504                                                                 \
 505         if (rsnd_is_enable_path(io, type)) {                    \
 506                 id = rsnd_info_id(priv, io, type);              \
 507                 if (id >= 0) {                                  \
 508                         mod = rsnd_##type##_mod_get(priv, id);  \
 509                         ret = rsnd_dai_connect(mod, io);        \
 510                 }                                               \
 511         }                                                       \
 512         ret;                                                    \
 513 })
 514
 515 #define rsnd_path_break(priv, io, type)                         \
 516 {                                                               \
 517         struct rsnd_mod *mod;                                   \
 518         int id = -1;                                            \
 519                                                                 \
 520         if (rsnd_is_enable_path(io, type)) {                    \
 521                 id = rsnd_info_id(priv, io, type);              \
 522                 if (id >= 0) {                                  \
 523                         mod = rsnd_##type##_mod_get(priv, id);  \
 524                         rsnd_dai_disconnect(mod, io);           \
 525                 }                                               \
 526         }                                                       \
 527 }
 528
 529 static int rsnd_path_init(struct rsnd_priv *priv,
 530                           struct rsnd_dai *rdai,
 531                           struct rsnd_dai_stream *io)
 532 {
 533         int ret;
 534
 535         /*
 536          * Gen1 is created by SRU/SSI, and this SRU is base module of
 537          * Gen2's SCU/SSIU/SSI. (Gen2 SCU/SSIU came from SRU)
 538          *
 539          * Easy image is..
 540          *      Gen1 SRU = Gen2 SCU + SSIU + etc
 541          *
 542          * Gen2 SCU path is very flexible, but, Gen1 SRU (SCU parts) is
 543          * using fixed path.
 544          */
 545
 546         /* SRC */
 547         ret = rsnd_path_parse(priv, io, src);
 548         if (ret < 0)
 549                 return ret;
 550
 551         /* SSI */
 552         ret = rsnd_path_parse(priv, io, ssi);
 553         if (ret < 0)
 554                 return ret;
 555
 556         /* DVC */
 557         ret = rsnd_path_parse(priv, io, dvc);
 558         if (ret < 0)
 559                 return ret;
 560
 561         return ret;
 562 }
 563
 564 static void rsnd_of_parse_dai(struct platform_device *pdev,
 565                               const struct rsnd_of_data *of_data,
 566                               struct rsnd_priv *priv)
 567 {
 568         struct device_node *dai_node,   *dai_np;
 569         struct device_node *ssi_node,   *ssi_np;
 570         struct device_node *src_node,   *src_np;
 571         struct device_node *dvc_node,   *dvc_np;
 572         struct device_node *playback, *capture;
 573         struct rsnd_dai_platform_info *dai_info;
 574         struct rcar_snd_info *info = rsnd_priv_to_info(priv);
 575         struct device *dev = &pdev->dev;
 576         int nr, i;
 577         int dai_i, ssi_i, src_i, dvc_i;
 578
 579         if (!of_data)
 580                 return;
 581
 582         dai_node = of_get_child_by_name(dev->of_node, "rcar_sound,dai");
 583         if (!dai_node)
 584                 return;
 585
 586         nr = of_get_child_count(dai_node);
 587         if (!nr)
 588                 return;
 589
 590         dai_info = devm_kzalloc(dev,
 591                                 sizeof(struct rsnd_dai_platform_info) * nr,
 592                                 GFP_KERNEL);
 593         if (!dai_info) {
 594                 dev_err(dev, "dai info allocation error\n");
 595                 return;
 596         }
 597
 598         info->dai_info_nr       = nr;
 599         info->dai_info          = dai_info;
 600
 601         ssi_node = of_get_child_by_name(dev->of_node, "rcar_sound,ssi");
 602         src_node = of_get_child_by_name(dev->of_node, "rcar_sound,src");
 603         dvc_node = of_get_child_by_name(dev->of_node, "rcar_sound,dvc");
 604
 605 #define mod_parse(name)                                                 \
 606 if (name##_node) {                                                      \
 607         struct rsnd_##name##_platform_info *name##_info;                \
 608                                                                         \
 609         name##_i = 0;                                                   \
 610         for_each_child_of_node(name##_node, name##_np) {                \
 611                 name##_info = info->name##_info + name##_i;             \
 612                                                                         \
 613                 if (name##_np == playback)                              \
 614                         dai_info->playback.name = name##_info;          \
 615                 if (name##_np == capture)                               \
 616                         dai_info->capture.name = name##_info;           \
 617                                                                         \
 618                 name##_i++;                                             \
 619         }                                                               \
 620 }
 621
 622         /*
 623          * parse all dai
 624          */
 625         dai_i = 0;
 626         for_each_child_of_node(dai_node, dai_np) {
 627                 dai_info = info->dai_info + dai_i;
 628
 629                 for (i = 0;; i++) {
 630
 631                         playback = of_parse_phandle(dai_np, "playback", i);
 632                         capture  = of_parse_phandle(dai_np, "capture", i);
 633
 634                         if (!playback && !capture)
 635                                 break;
 636
 637                         mod_parse(ssi);
 638                         mod_parse(src);
 639                         mod_parse(dvc);
 640
 641                         of_node_put(playback);
 642                         of_node_put(capture);
 643                 }
 644
 645                 dai_i++;
 646         }
 647 }
 648
 649 static int rsnd_dai_probe(struct platform_device *pdev,
 650                           const struct rsnd_of_data *of_data,
 651                           struct rsnd_priv *priv)
 652 {
 653         struct snd_soc_dai_driver *drv;
 654         struct rcar_snd_info *info = rsnd_priv_to_info(priv);
 655         struct rsnd_dai *rdai;
 656         struct rsnd_ssi_platform_info *pmod, *cmod;
 657         struct device *dev = rsnd_priv_to_dev(priv);
 658         int dai_nr;
 659         int i;
 660
 661         rsnd_of_parse_dai(pdev, of_data, priv);
 662
 663         dai_nr = info->dai_info_nr;
 664         if (!dai_nr) {
 665                 dev_err(dev, "no dai\n");
 666                 return -EIO;
 667         }
 668
 669         drv  = devm_kzalloc(dev, sizeof(*drv)  * dai_nr, GFP_KERNEL);
 670         rdai = devm_kzalloc(dev, sizeof(*rdai) * dai_nr, GFP_KERNEL);
 671         if (!drv || !rdai) {
 672                 dev_err(dev, "dai allocate failed\n");
 673                 return -ENOMEM;
 674         }
 675
 676         priv->rdai_nr   = dai_nr;
 677         priv->daidrv    = drv;
 678         priv->rdai      = rdai;
 679
 680         for (i = 0; i < dai_nr; i++) {
 681
 682                 pmod = info->dai_info[i].playback.ssi;
 683                 cmod = info->dai_info[i].capture.ssi;
 684
 685                 /*
 686                  *      init rsnd_dai
 687                  */
 688                 snprintf(rdai[i].name, RSND_DAI_NAME_SIZE, "rsnd-dai.%d", i);
 689                 rdai[i].priv = priv;
 690
 691                 /*
 692                  *      init snd_soc_dai_driver
 693                  */
 694                 drv[i].name     = rdai[i].name;
 695                 drv[i].ops      = &rsnd_soc_dai_ops;
 696                 if (pmod) {
 697                         snprintf(rdai[i].playback.name, RSND_DAI_NAME_SIZE,
 698                                  "DAI%d Playback", i);
 699
 700                         drv[i].playback.rates           = RSND_RATES;
 701                         drv[i].playback.formats         = RSND_FMTS;
 702                         drv[i].playback.channels_min    = 2;
 703                         drv[i].playback.channels_max    = 2;
 704                         drv[i].playback.stream_name     = rdai[i].playback.name;
 705
 706                         rdai[i].playback.info = &info->dai_info[i].playback;
 707                         rdai[i].playback.rdai = rdai + i;
 708                         rsnd_path_init(priv, &rdai[i], &rdai[i].playback);
 709                 }
 710                 if (cmod) {
 711                         snprintf(rdai[i].capture.name, RSND_DAI_NAME_SIZE,
 712                                  "DAI%d Capture", i);
 713
 714                         drv[i].capture.rates            = RSND_RATES;
 715                         drv[i].capture.formats          = RSND_FMTS;
 716                         drv[i].capture.channels_min     = 2;
 717                         drv[i].capture.channels_max     = 2;
 718                         drv[i].capture.stream_name      = rdai[i].capture.name;
 719
 720                         rdai[i].capture.info = &info->dai_info[i].capture;
 721                         rdai[i].capture.rdai = rdai + i;
 722                         rsnd_path_init(priv, &rdai[i], &rdai[i].capture);
 723                 }
 724
 725                 dev_dbg(dev, "%s (%s/%s)\n", rdai[i].name,
 726                         pmod ? "play"    : " -- ",
 727                         cmod ? "capture" : "  --   ");
 728         }
 729
 730         return 0;
 731 }
 732
 733 /*
 734  *              pcm ops
 735  */
 736 static struct snd_pcm_hardware rsnd_pcm_hardware = {
 737         .info =         SNDRV_PCM_INFO_INTERLEAVED      |
 738                         SNDRV_PCM_INFO_MMAP             |
 739                         SNDRV_PCM_INFO_MMAP_VALID,
 740         .buffer_bytes_max       = 64 * 1024,
 741         .period_bytes_min       = 32,
 742         .period_bytes_max       = 8192,
 743         .periods_min            = 1,
 744         .periods_max            = 32,
 745         .fifo_size              = 256,
 746 };
 747
 748 static int rsnd_pcm_open(struct snd_pcm_substream *substream)
 749 {
 750         struct snd_pcm_runtime *runtime = substream->runtime;
 751         int ret = 0;
 752
 753         snd_soc_set_runtime_hwparams(substream, &rsnd_pcm_hardware);
 754
 755         ret = snd_pcm_hw_constraint_integer(runtime,
 756                                             SNDRV_PCM_HW_PARAM_PERIODS);
 757
 758         return ret;
 759 }
 760
 761 static int rsnd_hw_params(struct snd_pcm_substream *substream,
 762                          struct snd_pcm_hw_params *hw_params)
 763 {
 764         struct snd_soc_dai *dai = rsnd_substream_to_dai(substream);
 765         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
 766         struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream);
 767         int ret;
 768
 769         ret = rsnd_dai_call(hw_params, io, substream, hw_params);
 770         if (ret)
 771                 return ret;
 772
 773         return snd_pcm_lib_malloc_pages(substream,
 774                                         params_buffer_bytes(hw_params));
 775 }
 776
 777 static snd_pcm_uframes_t rsnd_pointer(struct snd_pcm_substream *substream)
 778 {
 779         struct snd_pcm_runtime *runtime = substream->runtime;
 780         struct snd_soc_dai *dai = rsnd_substream_to_dai(substream);
 781         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
 782         struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream);
 783
 784         return bytes_to_frames(runtime, io->byte_pos);
 785 }
 786
 787 static struct snd_pcm_ops rsnd_pcm_ops = {
 788         .open           = rsnd_pcm_open,
 789         .ioctl          = snd_pcm_lib_ioctl,
 790         .hw_params      = rsnd_hw_params,
 791         .hw_free        = snd_pcm_lib_free_pages,
 792         .pointer        = rsnd_pointer,
 793 };
 794
 795 /*
 796  *              snd_kcontrol
 797  */
 798 #define kcontrol_to_cfg(kctrl) ((struct rsnd_kctrl_cfg *)kctrl->private_value)
 799 static int rsnd_kctrl_info(struct snd_kcontrol *kctrl,
 800                            struct snd_ctl_elem_info *uinfo)
 801 {
 802         struct rsnd_kctrl_cfg *cfg = kcontrol_to_cfg(kctrl);
 803
 804         if (cfg->texts) {
 805                 uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
 806                 uinfo->count = cfg->size;
 807                 uinfo->value.enumerated.items = cfg->max;
 808                 if (uinfo->value.enumerated.item >= cfg->max)
 809                         uinfo->value.enumerated.item = cfg->max - 1;
 810                 strlcpy(uinfo->value.enumerated.name,
 811                         cfg->texts[uinfo->value.enumerated.item],
 812                         sizeof(uinfo->value.enumerated.name));
 813         } else {
 814                 uinfo->count = cfg->size;
 815                 uinfo->value.integer.min = 0;
 816                 uinfo->value.integer.max = cfg->max;
 817                 uinfo->type = (cfg->max == 1) ?
 818                         SNDRV_CTL_ELEM_TYPE_BOOLEAN :
 819                         SNDRV_CTL_ELEM_TYPE_INTEGER;
 820         }
 821
 822         return 0;
 823 }
 824
 825 static int rsnd_kctrl_get(struct snd_kcontrol *kctrl,
 826                           struct snd_ctl_elem_value *uc)
 827 {
 828         struct rsnd_kctrl_cfg *cfg = kcontrol_to_cfg(kctrl);
 829         int i;
 830
 831         for (i = 0; i < cfg->size; i++)
 832                 if (cfg->texts)
 833                         uc->value.enumerated.item[i] = cfg->val[i];
 834                 else
 835                         uc->value.integer.value[i] = cfg->val[i];
 836
 837         return 0;
 838 }
 839
 840 static int rsnd_kctrl_put(struct snd_kcontrol *kctrl,
 841                           struct snd_ctl_elem_value *uc)
 842 {
 843         struct rsnd_mod *mod = snd_kcontrol_chip(kctrl);
 844         struct rsnd_kctrl_cfg *cfg = kcontrol_to_cfg(kctrl);
 845         int i, change = 0;
 846
 847         for (i = 0; i < cfg->size; i++) {
 848                 if (cfg->texts) {
 849                         change |= (uc->value.enumerated.item[i] != cfg->val[i]);
 850                         cfg->val[i] = uc->value.enumerated.item[i];
 851                 } else {
 852                         change |= (uc->value.integer.value[i] != cfg->val[i]);
 853                         cfg->val[i] = uc->value.integer.value[i];
 854                 }
 855         }
 856
 857         if (change)
 858                 cfg->update(mod);
 859
 860         return change;
 861 }
 862
 863 static int __rsnd_kctrl_new(struct rsnd_mod *mod,
 864                             struct snd_soc_pcm_runtime *rtd,
 865                             const unsigned char *name,
 866                             struct rsnd_kctrl_cfg *cfg,
 867                             void (*update)(struct rsnd_mod *mod))
 868 {
 869         struct snd_soc_card *soc_card = rtd->card;
 870         struct snd_card *card = rtd->card->snd_card;
 871         struct snd_kcontrol *kctrl;
 872         struct snd_kcontrol_new knew = {
 873                 .iface          = SNDRV_CTL_ELEM_IFACE_MIXER,
 874                 .name           = name,
 875                 .info           = rsnd_kctrl_info,
 876                 .index          = rtd - soc_card->rtd,
 877                 .get            = rsnd_kctrl_get,
 878                 .put            = rsnd_kctrl_put,
 879                 .private_value  = (unsigned long)cfg,
 880         };
 881         int ret;
 882
 883         kctrl = snd_ctl_new1(&knew, mod);
 884         if (!kctrl)
 885                 return -ENOMEM;
 886
 887         ret = snd_ctl_add(card, kctrl);
 888         if (ret < 0) {
 889                 snd_ctl_free_one(kctrl);
 890                 return ret;
 891         }
 892
 893         cfg->update = update;
 894         cfg->card = card;
 895         cfg->kctrl = kctrl;
 896
 897         return 0;
 898 }
 899
 900 void _rsnd_kctrl_remove(struct rsnd_kctrl_cfg *cfg)
 901 {
 902         snd_ctl_remove(cfg->card, cfg->kctrl);
 903 }
 904
 905 int rsnd_kctrl_new_m(struct rsnd_mod *mod,
 906                      struct snd_soc_pcm_runtime *rtd,
 907                      const unsigned char *name,
 908                      void (*update)(struct rsnd_mod *mod),
 909                      struct rsnd_kctrl_cfg_m *_cfg,
 910                      u32 max)
 911 {
 912         _cfg->cfg.max   = max;
 913         _cfg->cfg.size  = RSND_DVC_CHANNELS;
 914         _cfg->cfg.val   = _cfg->val;
 915         return __rsnd_kctrl_new(mod, rtd, name, &_cfg->cfg, update);
 916 }
 917
 918 int rsnd_kctrl_new_s(struct rsnd_mod *mod,
 919                      struct snd_soc_pcm_runtime *rtd,
 920                      const unsigned char *name,
 921                      void (*update)(struct rsnd_mod *mod),
 922                      struct rsnd_kctrl_cfg_s *_cfg,
 923                      u32 max)
 924 {
 925         _cfg->cfg.max   = max;
 926         _cfg->cfg.size  = 1;
 927         _cfg->cfg.val   = &_cfg->val;
 928         return __rsnd_kctrl_new(mod, rtd, name, &_cfg->cfg, update);
 929 }
 930
 931 int rsnd_kctrl_new_e(struct rsnd_mod *mod,
 932                      struct snd_soc_pcm_runtime *rtd,
 933                      const unsigned char *name,
 934                      struct rsnd_kctrl_cfg_s *_cfg,
 935                      void (*update)(struct rsnd_mod *mod),
 936                      const char * const *texts,
 937                      u32 max)
 938 {
 939         _cfg->cfg.max   = max;
 940         _cfg->cfg.size  = 1;
 941         _cfg->cfg.val   = &_cfg->val;
 942         _cfg->cfg.texts = texts;
 943         return __rsnd_kctrl_new(mod, rtd, name, &_cfg->cfg, update);
 944 }
 945
 946 /*
 947  *              snd_soc_platform
 948  */
 949
 950 #define PREALLOC_BUFFER         (32 * 1024)
 951 #define PREALLOC_BUFFER_MAX     (32 * 1024)
 952
 953 static int rsnd_pcm_new(struct snd_soc_pcm_runtime *rtd)
 954 {
 955         struct snd_soc_dai *dai = rtd->cpu_dai;
 956         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
 957         int ret;
 958
 959         ret = rsnd_dai_call(pcm_new, &rdai->playback, rtd);
 960         if (ret)
 961                 return ret;
 962
 963         ret = rsnd_dai_call(pcm_new, &rdai->capture, rtd);
 964         if (ret)
 965                 return ret;
 966
 967         return snd_pcm_lib_preallocate_pages_for_all(
 968                 rtd->pcm,
 969                 SNDRV_DMA_TYPE_DEV,
 970                 rtd->card->snd_card->dev,
 971                 PREALLOC_BUFFER, PREALLOC_BUFFER_MAX);
 972 }
 973
 974 static struct snd_soc_platform_driver rsnd_soc_platform = {
 975         .ops            = &rsnd_pcm_ops,
 976         .pcm_new        = rsnd_pcm_new,
 977 };
 978
 979 static const struct snd_soc_component_driver rsnd_soc_component = {
 980         .name           = "rsnd",
 981 };
 982
 983 static int rsnd_rdai_continuance_probe(struct rsnd_priv *priv,
 984                                        struct rsnd_dai_stream *io)
 985 {
 986         int ret;
 987
 988         ret = rsnd_dai_call(probe, io, priv);
 989         if (ret == -EAGAIN) {
 990                 /*
 991                  * Fallback to PIO mode
 992                  */
 993
 994                 /*
 995                  * call "remove" for SSI/SRC/DVC
 996                  * SSI will be switch to PIO mode if it was DMA mode
 997                  * see
 998                  *      rsnd_dma_init()
 999                  *      rsnd_ssi_fallback()
1000                  */
1001                 rsnd_dai_call(remove, io, priv);
1002
1003                 /*
1004                  * remove SRC/DVC from DAI,
1005                  */
1006                 rsnd_path_break(priv, io, src);
1007                 rsnd_path_break(priv, io, dvc);
1008
1009                 /*
1010                  * fallback
1011                  */
1012                 rsnd_dai_call(fallback, io, priv);
1013
1014                 /*
1015                  * retry to "probe".
1016                  * DAI has SSI which is PIO mode only now.
1017                  */
1018                 ret = rsnd_dai_call(probe, io, priv);
1019         }
1020
1021         return ret;
1022 }
1023
1024 /*
1025  *      rsnd probe
1026  */
1027 static int rsnd_probe(struct platform_device *pdev)
1028 {
1029         struct rcar_snd_info *info;
1030         struct rsnd_priv *priv;
1031         struct device *dev = &pdev->dev;
1032         struct rsnd_dai *rdai;
1033         const struct of_device_id *of_id = of_match_device(rsnd_of_match, dev);
1034         const struct rsnd_of_data *of_data;
1035         int (*probe_func[])(struct platform_device *pdev,
1036                             const struct rsnd_of_data *of_data,
1037                             struct rsnd_priv *priv) = {
1038                 rsnd_gen_probe,
1039                 rsnd_dma_probe,
1040                 rsnd_ssi_probe,
1041                 rsnd_src_probe,
1042                 rsnd_dvc_probe,
1043                 rsnd_adg_probe,
1044                 rsnd_dai_probe,
1045         };
1046         int ret, i;
1047
1048         info = NULL;
1049         of_data = NULL;
1050         if (of_id) {
1051                 info = devm_kzalloc(&pdev->dev,
1052                                     sizeof(struct rcar_snd_info), GFP_KERNEL);
1053                 of_data = of_id->data;
1054         } else {
1055                 info = pdev->dev.platform_data;
1056         }
1057
1058         if (!info) {
1059                 dev_err(dev, "driver needs R-Car sound information\n");
1060                 return -ENODEV;
1061         }
1062
1063         /*
1064          *      init priv data
1065          */
1066         priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
1067         if (!priv) {
1068                 dev_err(dev, "priv allocate failed\n");
1069                 return -ENODEV;
1070         }
1071
1072         priv->pdev      = pdev;
1073         priv->info      = info;
1074         spin_lock_init(&priv->lock);
1075
1076         /*
1077          *      init each module
1078          */
1079         for (i = 0; i < ARRAY_SIZE(probe_func); i++) {
1080                 ret = probe_func[i](pdev, of_data, priv);
1081                 if (ret)
1082                         return ret;
1083         }
1084
1085         for_each_rsnd_dai(rdai, priv, i) {
1086                 ret = rsnd_rdai_continuance_probe(priv, &rdai->playback);
1087                 if (ret)
1088                         goto exit_snd_probe;
1089
1090                 ret = rsnd_rdai_continuance_probe(priv, &rdai->capture);
1091                 if (ret)
1092                         goto exit_snd_probe;
1093         }
1094
1095         dev_set_drvdata(dev, priv);
1096
1097         /*
1098          *      asoc register
1099          */
1100         ret = snd_soc_register_platform(dev, &rsnd_soc_platform);
1101         if (ret < 0) {
1102                 dev_err(dev, "cannot snd soc register\n");
1103                 return ret;
1104         }
1105
1106         ret = snd_soc_register_component(dev, &rsnd_soc_component,
1107                                          priv->daidrv, rsnd_rdai_nr(priv));
1108         if (ret < 0) {
1109                 dev_err(dev, "cannot snd dai register\n");
1110                 goto exit_snd_soc;
1111         }
1112
1113         pm_runtime_enable(dev);
1114
1115         dev_info(dev, "probed\n");
1116         return ret;
1117
1118 exit_snd_soc:
1119         snd_soc_unregister_platform(dev);
1120 exit_snd_probe:
1121         for_each_rsnd_dai(rdai, priv, i) {
1122                 rsnd_dai_call(remove, &rdai->playback, priv);
1123                 rsnd_dai_call(remove, &rdai->capture, priv);
1124         }
1125
1126         return ret;
1127 }
1128
1129 static int rsnd_remove(struct platform_device *pdev)
1130 {
1131         struct rsnd_priv *priv = dev_get_drvdata(&pdev->dev);
1132         struct rsnd_dai *rdai;
1133         void (*remove_func[])(struct platform_device *pdev,
1134                               struct rsnd_priv *priv) = {
1135                 rsnd_ssi_remove,
1136                 rsnd_src_remove,
1137                 rsnd_dvc_remove,
1138         };
1139         int ret = 0, i;
1140
1141         pm_runtime_disable(&pdev->dev);
1142
1143         for_each_rsnd_dai(rdai, priv, i) {
1144                 ret |= rsnd_dai_call(remove, &rdai->playback, priv);
1145                 ret |= rsnd_dai_call(remove, &rdai->capture, priv);
1146         }
1147
1148         for (i = 0; i < ARRAY_SIZE(remove_func); i++)
1149                 remove_func[i](pdev, priv);
1150
1151         snd_soc_unregister_component(&pdev->dev);
1152         snd_soc_unregister_platform(&pdev->dev);
1153
1154         return ret;
1155 }
1156
1157 static struct platform_driver rsnd_driver = {
1158         .driver = {
1159                 .name   = "rcar_sound",
1160                 .of_match_table = rsnd_of_match,
1161         },
1162         .probe          = rsnd_probe,
1163         .remove         = rsnd_remove,
1164 };
1165 module_platform_driver(rsnd_driver);
1166
1167 MODULE_LICENSE("GPL");
1168 MODULE_DESCRIPTION("Renesas R-Car audio driver");
1169 MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");
1170 MODULE_ALIAS("platform:rcar-pcm-audio");