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 /*
 174  *      settting function
 175  */
 176 u32 rsnd_get_adinr(struct rsnd_mod *mod)
 177 {
 178         struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
 179         struct rsnd_dai_stream *io = rsnd_mod_to_io(mod);
 180         struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
 181         struct device *dev = rsnd_priv_to_dev(priv);
 182         u32 adinr = runtime->channels;
 183
 184         switch (runtime->sample_bits) {
 185         case 16:
 186                 adinr |= (8 << 16);
 187                 break;
 188         case 32:
 189                 adinr |= (0 << 16);
 190                 break;
 191         default:
 192                 dev_warn(dev, "not supported sample bits\n");
 193                 return 0;
 194         }
 195
 196         return adinr;
 197 }
 198
 199 /*
 200  *      rsnd_dai functions
 201  */
 202 #define __rsnd_mod_call(mod, func, param...)                    \
 203 ({                                                              \
 204         struct rsnd_priv *priv = rsnd_mod_to_priv(mod);         \
 205         struct device *dev = rsnd_priv_to_dev(priv);            \
 206         u32 mask = (1 << __rsnd_mod_shift_##func) & ~(1 << 31); \
 207         u32 call = __rsnd_mod_call_##func << __rsnd_mod_shift_##func;   \
 208         int ret = 0;                                                    \
 209         if ((mod->status & mask) == call) {                             \
 210                 dev_dbg(dev, "%s[%d] %s\n",                             \
 211                         rsnd_mod_name(mod), rsnd_mod_id(mod), #func);   \
 212                 ret = (mod)->ops->func(mod, param);                     \
 213                 mod->status = (mod->status & ~mask) | (~call & mask);   \
 214         }                                                               \
 215         ret;                                                            \
 216 })
 217
 218 #define rsnd_mod_call(mod, func, param...)      \
 219         (!(mod) ? -ENODEV :                     \
 220          !((mod)->ops->func) ? 0 :              \
 221          __rsnd_mod_call(mod, func, param))
 222
 223 #define rsnd_dai_call(fn, io, param...)                         \
 224 ({                                                              \
 225         struct rsnd_mod *mod;                                   \
 226         int ret = 0, i;                                         \
 227         for (i = 0; i < RSND_MOD_MAX; i++) {                    \
 228                 mod = (io)->mod[i];                             \
 229                 if (!mod)                                       \
 230                         continue;                               \
 231                 ret = rsnd_mod_call(mod, fn, param);            \
 232                 if (ret < 0)                                    \
 233                         break;                                  \
 234         }                                                       \
 235         ret;                                                    \
 236 })
 237
 238 static int rsnd_dai_connect(struct rsnd_mod *mod,
 239                             struct rsnd_dai_stream *io)
 240 {
 241         if (!mod)
 242                 return -EIO;
 243
 244         if (io->mod[mod->type]) {
 245                 struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
 246                 struct device *dev = rsnd_priv_to_dev(priv);
 247
 248                 dev_err(dev, "%s[%d] is not empty\n",
 249                         rsnd_mod_name(mod),
 250                         rsnd_mod_id(mod));
 251                 return -EIO;
 252         }
 253
 254         io->mod[mod->type] = mod;
 255         mod->io = io;
 256
 257         return 0;
 258 }
 259
 260 static void rsnd_dai_disconnect(struct rsnd_mod *mod,
 261                                 struct rsnd_dai_stream *io)
 262 {
 263         mod->io = NULL;
 264         io->mod[mod->type] = NULL;
 265 }
 266
 267 struct rsnd_dai *rsnd_rdai_get(struct rsnd_priv *priv, int id)
 268 {
 269         if ((id < 0) || (id >= rsnd_rdai_nr(priv)))
 270                 return NULL;
 271
 272         return priv->rdai + id;
 273 }
 274
 275 static struct rsnd_dai *rsnd_dai_to_rdai(struct snd_soc_dai *dai)
 276 {
 277         struct rsnd_priv *priv = snd_soc_dai_get_drvdata(dai);
 278
 279         return rsnd_rdai_get(priv, dai->id);
 280 }
 281
 282 /*
 283  *      rsnd_soc_dai functions
 284  */
 285 int rsnd_dai_pointer_offset(struct rsnd_dai_stream *io, int additional)
 286 {
 287         struct snd_pcm_substream *substream = io->substream;
 288         struct snd_pcm_runtime *runtime = substream->runtime;
 289         int pos = io->byte_pos + additional;
 290
 291         pos %= (runtime->periods * io->byte_per_period);
 292
 293         return pos;
 294 }
 295
 296 void rsnd_dai_pointer_update(struct rsnd_dai_stream *io, int byte)
 297 {
 298         io->byte_pos += byte;
 299
 300         if (io->byte_pos >= io->next_period_byte) {
 301                 struct snd_pcm_substream *substream = io->substream;
 302                 struct snd_pcm_runtime *runtime = substream->runtime;
 303
 304                 io->period_pos++;
 305                 io->next_period_byte += io->byte_per_period;
 306
 307                 if (io->period_pos >= runtime->periods) {
 308                         io->byte_pos = 0;
 309                         io->period_pos = 0;
 310                         io->next_period_byte = io->byte_per_period;
 311                 }
 312
 313                 snd_pcm_period_elapsed(substream);
 314         }
 315 }
 316
 317 static int rsnd_dai_stream_init(struct rsnd_dai_stream *io,
 318                                 struct snd_pcm_substream *substream)
 319 {
 320         struct snd_pcm_runtime *runtime = substream->runtime;
 321
 322         io->substream           = substream;
 323         io->byte_pos            = 0;
 324         io->period_pos          = 0;
 325         io->byte_per_period     = runtime->period_size *
 326                                   runtime->channels *
 327                                   samples_to_bytes(runtime, 1);
 328         io->next_period_byte    = io->byte_per_period;
 329
 330         return 0;
 331 }
 332
 333 static
 334 struct snd_soc_dai *rsnd_substream_to_dai(struct snd_pcm_substream *substream)
 335 {
 336         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 337
 338         return  rtd->cpu_dai;
 339 }
 340
 341 static
 342 struct rsnd_dai_stream *rsnd_rdai_to_io(struct rsnd_dai *rdai,
 343                                         struct snd_pcm_substream *substream)
 344 {
 345         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 346                 return &rdai->playback;
 347         else
 348                 return &rdai->capture;
 349 }
 350
 351 static int rsnd_soc_dai_trigger(struct snd_pcm_substream *substream, int cmd,
 352                             struct snd_soc_dai *dai)
 353 {
 354         struct rsnd_priv *priv = snd_soc_dai_get_drvdata(dai);
 355         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
 356         struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream);
 357         int ssi_id = rsnd_mod_id(rsnd_io_to_mod_ssi(io));
 358         int ret;
 359         unsigned long flags;
 360
 361         rsnd_lock(priv, flags);
 362
 363         switch (cmd) {
 364         case SNDRV_PCM_TRIGGER_START:
 365                 ret = rsnd_dai_stream_init(io, substream);
 366                 if (ret < 0)
 367                         goto dai_trigger_end;
 368
 369                 ret = rsnd_platform_call(priv, dai, start, ssi_id);
 370                 if (ret < 0)
 371                         goto dai_trigger_end;
 372
 373                 ret = rsnd_dai_call(init, io, priv);
 374                 if (ret < 0)
 375                         goto dai_trigger_end;
 376
 377                 ret = rsnd_dai_call(start, io, priv);
 378                 if (ret < 0)
 379                         goto dai_trigger_end;
 380                 break;
 381         case SNDRV_PCM_TRIGGER_STOP:
 382                 ret = rsnd_dai_call(stop, io, priv);
 383                 if (ret < 0)
 384                         goto dai_trigger_end;
 385
 386                 ret = rsnd_dai_call(quit, io, priv);
 387                 if (ret < 0)
 388                         goto dai_trigger_end;
 389
 390                 ret = rsnd_platform_call(priv, dai, stop, ssi_id);
 391                 if (ret < 0)
 392                         goto dai_trigger_end;
 393                 break;
 394         default:
 395                 ret = -EINVAL;
 396         }
 397
 398 dai_trigger_end:
 399         rsnd_unlock(priv, flags);
 400
 401         return ret;
 402 }
 403
 404 static int rsnd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
 405 {
 406         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
 407
 408         /* set master/slave audio interface */
 409         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 410         case SND_SOC_DAIFMT_CBM_CFM:
 411                 rdai->clk_master = 0;
 412                 break;
 413         case SND_SOC_DAIFMT_CBS_CFS:
 414                 rdai->clk_master = 1; /* codec is slave, cpu is master */
 415                 break;
 416         default:
 417                 return -EINVAL;
 418         }
 419
 420         /* set format */
 421         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 422         case SND_SOC_DAIFMT_I2S:
 423                 rdai->sys_delay = 0;
 424                 rdai->data_alignment = 0;
 425                 rdai->frm_clk_inv = 0;
 426                 break;
 427         case SND_SOC_DAIFMT_LEFT_J:
 428                 rdai->sys_delay = 1;
 429                 rdai->data_alignment = 0;
 430                 rdai->frm_clk_inv = 1;
 431                 break;
 432         case SND_SOC_DAIFMT_RIGHT_J:
 433                 rdai->sys_delay = 1;
 434                 rdai->data_alignment = 1;
 435                 rdai->frm_clk_inv = 1;
 436                 break;
 437         }
 438
 439         /* set clock inversion */
 440         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
 441         case SND_SOC_DAIFMT_NB_IF:
 442                 rdai->bit_clk_inv =  rdai->bit_clk_inv;
 443                 rdai->frm_clk_inv = !rdai->frm_clk_inv;
 444                 break;
 445         case SND_SOC_DAIFMT_IB_NF:
 446                 rdai->bit_clk_inv = !rdai->bit_clk_inv;
 447                 rdai->frm_clk_inv =  rdai->frm_clk_inv;
 448                 break;
 449         case SND_SOC_DAIFMT_IB_IF:
 450                 rdai->bit_clk_inv = !rdai->bit_clk_inv;
 451                 rdai->frm_clk_inv = !rdai->frm_clk_inv;
 452                 break;
 453         case SND_SOC_DAIFMT_NB_NF:
 454         default:
 455                 break;
 456         }
 457
 458         return 0;
 459 }
 460
 461 static const struct snd_soc_dai_ops rsnd_soc_dai_ops = {
 462         .trigger        = rsnd_soc_dai_trigger,
 463         .set_fmt        = rsnd_soc_dai_set_fmt,
 464 };
 465
 466 #define rsnd_path_parse(priv, io, type)                         \
 467 ({                                                              \
 468         struct rsnd_mod *mod;                                   \
 469         int ret = 0;                                            \
 470         int id = -1;                                            \
 471                                                                 \
 472         if (rsnd_is_enable_path(io, type)) {                    \
 473                 id = rsnd_info_id(priv, io, type);              \
 474                 if (id >= 0) {                                  \
 475                         mod = rsnd_##type##_mod_get(priv, id);  \
 476                         ret = rsnd_dai_connect(mod, io);        \
 477                 }                                               \
 478         }                                                       \
 479         ret;                                                    \
 480 })
 481
 482 #define rsnd_path_break(priv, io, type)                         \
 483 {                                                               \
 484         struct rsnd_mod *mod;                                   \
 485         int id = -1;                                            \
 486                                                                 \
 487         if (rsnd_is_enable_path(io, type)) {                    \
 488                 id = rsnd_info_id(priv, io, type);              \
 489                 if (id >= 0) {                                  \
 490                         mod = rsnd_##type##_mod_get(priv, id);  \
 491                         rsnd_dai_disconnect(mod, io);           \
 492                 }                                               \
 493         }                                                       \
 494 }
 495
 496 static int rsnd_path_init(struct rsnd_priv *priv,
 497                           struct rsnd_dai *rdai,
 498                           struct rsnd_dai_stream *io)
 499 {
 500         int ret;
 501
 502         /*
 503          * Gen1 is created by SRU/SSI, and this SRU is base module of
 504          * Gen2's SCU/SSIU/SSI. (Gen2 SCU/SSIU came from SRU)
 505          *
 506          * Easy image is..
 507          *      Gen1 SRU = Gen2 SCU + SSIU + etc
 508          *
 509          * Gen2 SCU path is very flexible, but, Gen1 SRU (SCU parts) is
 510          * using fixed path.
 511          */
 512
 513         /* SRC */
 514         ret = rsnd_path_parse(priv, io, src);
 515         if (ret < 0)
 516                 return ret;
 517
 518         /* SSI */
 519         ret = rsnd_path_parse(priv, io, ssi);
 520         if (ret < 0)
 521                 return ret;
 522
 523         /* DVC */
 524         ret = rsnd_path_parse(priv, io, dvc);
 525         if (ret < 0)
 526                 return ret;
 527
 528         return ret;
 529 }
 530
 531 static void rsnd_of_parse_dai(struct platform_device *pdev,
 532                               const struct rsnd_of_data *of_data,
 533                               struct rsnd_priv *priv)
 534 {
 535         struct device_node *dai_node,   *dai_np;
 536         struct device_node *ssi_node,   *ssi_np;
 537         struct device_node *src_node,   *src_np;
 538         struct device_node *dvc_node,   *dvc_np;
 539         struct device_node *playback, *capture;
 540         struct rsnd_dai_platform_info *dai_info;
 541         struct rcar_snd_info *info = rsnd_priv_to_info(priv);
 542         struct device *dev = &pdev->dev;
 543         int nr, i;
 544         int dai_i, ssi_i, src_i, dvc_i;
 545
 546         if (!of_data)
 547                 return;
 548
 549         dai_node = of_get_child_by_name(dev->of_node, "rcar_sound,dai");
 550         if (!dai_node)
 551                 return;
 552
 553         nr = of_get_child_count(dai_node);
 554         if (!nr)
 555                 return;
 556
 557         dai_info = devm_kzalloc(dev,
 558                                 sizeof(struct rsnd_dai_platform_info) * nr,
 559                                 GFP_KERNEL);
 560         if (!dai_info) {
 561                 dev_err(dev, "dai info allocation error\n");
 562                 return;
 563         }
 564
 565         info->dai_info_nr       = nr;
 566         info->dai_info          = dai_info;
 567
 568         ssi_node = of_get_child_by_name(dev->of_node, "rcar_sound,ssi");
 569         src_node = of_get_child_by_name(dev->of_node, "rcar_sound,src");
 570         dvc_node = of_get_child_by_name(dev->of_node, "rcar_sound,dvc");
 571
 572 #define mod_parse(name)                                                 \
 573 if (name##_node) {                                                      \
 574         struct rsnd_##name##_platform_info *name##_info;                \
 575                                                                         \
 576         name##_i = 0;                                                   \
 577         for_each_child_of_node(name##_node, name##_np) {                \
 578                 name##_info = info->name##_info + name##_i;             \
 579                                                                         \
 580                 if (name##_np == playback)                              \
 581                         dai_info->playback.name = name##_info;          \
 582                 if (name##_np == capture)                               \
 583                         dai_info->capture.name = name##_info;           \
 584                                                                         \
 585                 name##_i++;                                             \
 586         }                                                               \
 587 }
 588
 589         /*
 590          * parse all dai
 591          */
 592         dai_i = 0;
 593         for_each_child_of_node(dai_node, dai_np) {
 594                 dai_info = info->dai_info + dai_i;
 595
 596                 for (i = 0;; i++) {
 597
 598                         playback = of_parse_phandle(dai_np, "playback", i);
 599                         capture  = of_parse_phandle(dai_np, "capture", i);
 600
 601                         if (!playback && !capture)
 602                                 break;
 603
 604                         mod_parse(ssi);
 605                         mod_parse(src);
 606                         mod_parse(dvc);
 607
 608                         of_node_put(playback);
 609                         of_node_put(capture);
 610                 }
 611
 612                 dai_i++;
 613         }
 614 }
 615
 616 static int rsnd_dai_probe(struct platform_device *pdev,
 617                           const struct rsnd_of_data *of_data,
 618                           struct rsnd_priv *priv)
 619 {
 620         struct snd_soc_dai_driver *drv;
 621         struct rcar_snd_info *info = rsnd_priv_to_info(priv);
 622         struct rsnd_dai *rdai;
 623         struct rsnd_ssi_platform_info *pmod, *cmod;
 624         struct device *dev = rsnd_priv_to_dev(priv);
 625         int dai_nr;
 626         int i;
 627
 628         rsnd_of_parse_dai(pdev, of_data, priv);
 629
 630         dai_nr = info->dai_info_nr;
 631         if (!dai_nr) {
 632                 dev_err(dev, "no dai\n");
 633                 return -EIO;
 634         }
 635
 636         drv  = devm_kzalloc(dev, sizeof(*drv)  * dai_nr, GFP_KERNEL);
 637         rdai = devm_kzalloc(dev, sizeof(*rdai) * dai_nr, GFP_KERNEL);
 638         if (!drv || !rdai) {
 639                 dev_err(dev, "dai allocate failed\n");
 640                 return -ENOMEM;
 641         }
 642
 643         priv->rdai_nr   = dai_nr;
 644         priv->daidrv    = drv;
 645         priv->rdai      = rdai;
 646
 647         for (i = 0; i < dai_nr; i++) {
 648
 649                 pmod = info->dai_info[i].playback.ssi;
 650                 cmod = info->dai_info[i].capture.ssi;
 651
 652                 /*
 653                  *      init rsnd_dai
 654                  */
 655                 snprintf(rdai[i].name, RSND_DAI_NAME_SIZE, "rsnd-dai.%d", i);
 656                 rdai[i].priv = priv;
 657
 658                 /*
 659                  *      init snd_soc_dai_driver
 660                  */
 661                 drv[i].name     = rdai[i].name;
 662                 drv[i].ops      = &rsnd_soc_dai_ops;
 663                 if (pmod) {
 664                         snprintf(rdai[i].playback.name, RSND_DAI_NAME_SIZE,
 665                                  "DAI%d Playback", i);
 666
 667                         drv[i].playback.rates           = RSND_RATES;
 668                         drv[i].playback.formats         = RSND_FMTS;
 669                         drv[i].playback.channels_min    = 2;
 670                         drv[i].playback.channels_max    = 2;
 671                         drv[i].playback.stream_name     = rdai[i].playback.name;
 672
 673                         rdai[i].playback.info = &info->dai_info[i].playback;
 674                         rdai[i].playback.rdai = rdai + i;
 675                         rsnd_path_init(priv, &rdai[i], &rdai[i].playback);
 676                 }
 677                 if (cmod) {
 678                         snprintf(rdai[i].capture.name, RSND_DAI_NAME_SIZE,
 679                                  "DAI%d Capture", i);
 680
 681                         drv[i].capture.rates            = RSND_RATES;
 682                         drv[i].capture.formats          = RSND_FMTS;
 683                         drv[i].capture.channels_min     = 2;
 684                         drv[i].capture.channels_max     = 2;
 685                         drv[i].capture.stream_name      = rdai[i].capture.name;
 686
 687                         rdai[i].capture.info = &info->dai_info[i].capture;
 688                         rdai[i].capture.rdai = rdai + i;
 689                         rsnd_path_init(priv, &rdai[i], &rdai[i].capture);
 690                 }
 691
 692                 dev_dbg(dev, "%s (%s/%s)\n", rdai[i].name,
 693                         pmod ? "play"    : " -- ",
 694                         cmod ? "capture" : "  --   ");
 695         }
 696
 697         return 0;
 698 }
 699
 700 /*
 701  *              pcm ops
 702  */
 703 static struct snd_pcm_hardware rsnd_pcm_hardware = {
 704         .info =         SNDRV_PCM_INFO_INTERLEAVED      |
 705                         SNDRV_PCM_INFO_MMAP             |
 706                         SNDRV_PCM_INFO_MMAP_VALID,
 707         .buffer_bytes_max       = 64 * 1024,
 708         .period_bytes_min       = 32,
 709         .period_bytes_max       = 8192,
 710         .periods_min            = 1,
 711         .periods_max            = 32,
 712         .fifo_size              = 256,
 713 };
 714
 715 static int rsnd_pcm_open(struct snd_pcm_substream *substream)
 716 {
 717         struct snd_pcm_runtime *runtime = substream->runtime;
 718         int ret = 0;
 719
 720         snd_soc_set_runtime_hwparams(substream, &rsnd_pcm_hardware);
 721
 722         ret = snd_pcm_hw_constraint_integer(runtime,
 723                                             SNDRV_PCM_HW_PARAM_PERIODS);
 724
 725         return ret;
 726 }
 727
 728 static int rsnd_hw_params(struct snd_pcm_substream *substream,
 729                          struct snd_pcm_hw_params *hw_params)
 730 {
 731         struct snd_soc_dai *dai = rsnd_substream_to_dai(substream);
 732         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
 733         struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream);
 734         int ret;
 735
 736         ret = rsnd_dai_call(hw_params, io, substream, hw_params);
 737         if (ret)
 738                 return ret;
 739
 740         return snd_pcm_lib_malloc_pages(substream,
 741                                         params_buffer_bytes(hw_params));
 742 }
 743
 744 static snd_pcm_uframes_t rsnd_pointer(struct snd_pcm_substream *substream)
 745 {
 746         struct snd_pcm_runtime *runtime = substream->runtime;
 747         struct snd_soc_dai *dai = rsnd_substream_to_dai(substream);
 748         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
 749         struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream);
 750
 751         return bytes_to_frames(runtime, io->byte_pos);
 752 }
 753
 754 static struct snd_pcm_ops rsnd_pcm_ops = {
 755         .open           = rsnd_pcm_open,
 756         .ioctl          = snd_pcm_lib_ioctl,
 757         .hw_params      = rsnd_hw_params,
 758         .hw_free        = snd_pcm_lib_free_pages,
 759         .pointer        = rsnd_pointer,
 760 };
 761
 762 /*
 763  *              snd_kcontrol
 764  */
 765 #define kcontrol_to_cfg(kctrl) ((struct rsnd_kctrl_cfg *)kctrl->private_value)
 766 static int rsnd_kctrl_info(struct snd_kcontrol *kctrl,
 767                            struct snd_ctl_elem_info *uinfo)
 768 {
 769         struct rsnd_kctrl_cfg *cfg = kcontrol_to_cfg(kctrl);
 770
 771         if (cfg->texts) {
 772                 uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
 773                 uinfo->count = cfg->size;
 774                 uinfo->value.enumerated.items = cfg->max;
 775                 if (uinfo->value.enumerated.item >= cfg->max)
 776                         uinfo->value.enumerated.item = cfg->max - 1;
 777                 strlcpy(uinfo->value.enumerated.name,
 778                         cfg->texts[uinfo->value.enumerated.item],
 779                         sizeof(uinfo->value.enumerated.name));
 780         } else {
 781                 uinfo->count = cfg->size;
 782                 uinfo->value.integer.min = 0;
 783                 uinfo->value.integer.max = cfg->max;
 784                 uinfo->type = (cfg->max == 1) ?
 785                         SNDRV_CTL_ELEM_TYPE_BOOLEAN :
 786                         SNDRV_CTL_ELEM_TYPE_INTEGER;
 787         }
 788
 789         return 0;
 790 }
 791
 792 static int rsnd_kctrl_get(struct snd_kcontrol *kctrl,
 793                           struct snd_ctl_elem_value *uc)
 794 {
 795         struct rsnd_kctrl_cfg *cfg = kcontrol_to_cfg(kctrl);
 796         int i;
 797
 798         for (i = 0; i < cfg->size; i++)
 799                 if (cfg->texts)
 800                         uc->value.enumerated.item[i] = cfg->val[i];
 801                 else
 802                         uc->value.integer.value[i] = cfg->val[i];
 803
 804         return 0;
 805 }
 806
 807 static int rsnd_kctrl_put(struct snd_kcontrol *kctrl,
 808                           struct snd_ctl_elem_value *uc)
 809 {
 810         struct rsnd_mod *mod = snd_kcontrol_chip(kctrl);
 811         struct rsnd_kctrl_cfg *cfg = kcontrol_to_cfg(kctrl);
 812         int i, change = 0;
 813
 814         for (i = 0; i < cfg->size; i++) {
 815                 if (cfg->texts) {
 816                         change |= (uc->value.enumerated.item[i] != cfg->val[i]);
 817                         cfg->val[i] = uc->value.enumerated.item[i];
 818                 } else {
 819                         change |= (uc->value.integer.value[i] != cfg->val[i]);
 820                         cfg->val[i] = uc->value.integer.value[i];
 821                 }
 822         }
 823
 824         if (change)
 825                 cfg->update(mod);
 826
 827         return change;
 828 }
 829
 830 static int __rsnd_kctrl_new(struct rsnd_mod *mod,
 831                             struct snd_soc_pcm_runtime *rtd,
 832                             const unsigned char *name,
 833                             struct rsnd_kctrl_cfg *cfg,
 834                             void (*update)(struct rsnd_mod *mod))
 835 {
 836         struct snd_card *card = rtd->card->snd_card;
 837         struct snd_kcontrol *kctrl;
 838         struct snd_kcontrol_new knew = {
 839                 .iface          = SNDRV_CTL_ELEM_IFACE_MIXER,
 840                 .name           = name,
 841                 .info           = rsnd_kctrl_info,
 842                 .get            = rsnd_kctrl_get,
 843                 .put            = rsnd_kctrl_put,
 844                 .private_value  = (unsigned long)cfg,
 845         };
 846         int ret;
 847
 848         kctrl = snd_ctl_new1(&knew, mod);
 849         if (!kctrl)
 850                 return -ENOMEM;
 851
 852         ret = snd_ctl_add(card, kctrl);
 853         if (ret < 0) {
 854                 snd_ctl_free_one(kctrl);
 855                 return ret;
 856         }
 857
 858         cfg->update = update;
 859         cfg->card = card;
 860         cfg->kctrl = kctrl;
 861
 862         return 0;
 863 }
 864
 865 void _rsnd_kctrl_remove(struct rsnd_kctrl_cfg *cfg)
 866 {
 867         snd_ctl_remove(cfg->card, cfg->kctrl);
 868 }
 869
 870 int rsnd_kctrl_new_m(struct rsnd_mod *mod,
 871                      struct snd_soc_pcm_runtime *rtd,
 872                      const unsigned char *name,
 873                      void (*update)(struct rsnd_mod *mod),
 874                      struct rsnd_kctrl_cfg_m *_cfg,
 875                      u32 max)
 876 {
 877         _cfg->cfg.max   = max;
 878         _cfg->cfg.size  = RSND_DVC_CHANNELS;
 879         _cfg->cfg.val   = _cfg->val;
 880         return __rsnd_kctrl_new(mod, rtd, name, &_cfg->cfg, update);
 881 }
 882
 883 int rsnd_kctrl_new_s(struct rsnd_mod *mod,
 884                      struct snd_soc_pcm_runtime *rtd,
 885                      const unsigned char *name,
 886                      void (*update)(struct rsnd_mod *mod),
 887                      struct rsnd_kctrl_cfg_s *_cfg,
 888                      u32 max)
 889 {
 890         _cfg->cfg.max   = max;
 891         _cfg->cfg.size  = 1;
 892         _cfg->cfg.val   = &_cfg->val;
 893         return __rsnd_kctrl_new(mod, rtd, name, &_cfg->cfg, update);
 894 }
 895
 896 int rsnd_kctrl_new_e(struct rsnd_mod *mod,
 897                      struct snd_soc_pcm_runtime *rtd,
 898                      const unsigned char *name,
 899                      struct rsnd_kctrl_cfg_s *_cfg,
 900                      void (*update)(struct rsnd_mod *mod),
 901                      const char * const *texts,
 902                      u32 max)
 903 {
 904         _cfg->cfg.max   = max;
 905         _cfg->cfg.size  = 1;
 906         _cfg->cfg.val   = &_cfg->val;
 907         _cfg->cfg.texts = texts;
 908         return __rsnd_kctrl_new(mod, rtd, name, &_cfg->cfg, update);
 909 }
 910
 911 /*
 912  *              snd_soc_platform
 913  */
 914
 915 #define PREALLOC_BUFFER         (32 * 1024)
 916 #define PREALLOC_BUFFER_MAX     (32 * 1024)
 917
 918 static int rsnd_pcm_new(struct snd_soc_pcm_runtime *rtd)
 919 {
 920         struct snd_soc_dai *dai = rtd->cpu_dai;
 921         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
 922         int ret;
 923
 924         ret = rsnd_dai_call(pcm_new, &rdai->playback, rtd);
 925         if (ret)
 926                 return ret;
 927
 928         ret = rsnd_dai_call(pcm_new, &rdai->capture, rtd);
 929         if (ret)
 930                 return ret;
 931
 932         return snd_pcm_lib_preallocate_pages_for_all(
 933                 rtd->pcm,
 934                 SNDRV_DMA_TYPE_DEV,
 935                 rtd->card->snd_card->dev,
 936                 PREALLOC_BUFFER, PREALLOC_BUFFER_MAX);
 937 }
 938
 939 static struct snd_soc_platform_driver rsnd_soc_platform = {
 940         .ops            = &rsnd_pcm_ops,
 941         .pcm_new        = rsnd_pcm_new,
 942 };
 943
 944 static const struct snd_soc_component_driver rsnd_soc_component = {
 945         .name           = "rsnd",
 946 };
 947
 948 static int rsnd_rdai_continuance_probe(struct rsnd_priv *priv,
 949                                        struct rsnd_dai_stream *io)
 950 {
 951         int ret;
 952
 953         ret = rsnd_dai_call(probe, io, priv);
 954         if (ret == -EAGAIN) {
 955                 /*
 956                  * Fallback to PIO mode
 957                  */
 958
 959                 /*
 960                  * call "remove" for SSI/SRC/DVC
 961                  * SSI will be switch to PIO mode if it was DMA mode
 962                  * see
 963                  *      rsnd_dma_init()
 964                  *      rsnd_ssi_fallback()
 965                  */
 966                 rsnd_dai_call(remove, io, priv);
 967
 968                 /*
 969                  * remove SRC/DVC from DAI,
 970                  */
 971                 rsnd_path_break(priv, io, src);
 972                 rsnd_path_break(priv, io, dvc);
 973
 974                 /*
 975                  * fallback
 976                  */
 977                 rsnd_dai_call(fallback, io, priv);
 978
 979                 /*
 980                  * retry to "probe".
 981                  * DAI has SSI which is PIO mode only now.
 982                  */
 983                 ret = rsnd_dai_call(probe, io, priv);
 984         }
 985
 986         return ret;
 987 }
 988
 989 /*
 990  *      rsnd probe
 991  */
 992 static int rsnd_probe(struct platform_device *pdev)
 993 {
 994         struct rcar_snd_info *info;
 995         struct rsnd_priv *priv;
 996         struct device *dev = &pdev->dev;
 997         struct rsnd_dai *rdai;
 998         const struct of_device_id *of_id = of_match_device(rsnd_of_match, dev);
 999         const struct rsnd_of_data *of_data;
1000         int (*probe_func[])(struct platform_device *pdev,
1001                             const struct rsnd_of_data *of_data,
1002                             struct rsnd_priv *priv) = {
1003                 rsnd_gen_probe,
1004                 rsnd_dma_probe,
1005                 rsnd_ssi_probe,
1006                 rsnd_src_probe,
1007                 rsnd_dvc_probe,
1008                 rsnd_adg_probe,
1009                 rsnd_dai_probe,
1010         };
1011         int ret, i;
1012
1013         info = NULL;
1014         of_data = NULL;
1015         if (of_id) {
1016                 info = devm_kzalloc(&pdev->dev,
1017                                     sizeof(struct rcar_snd_info), GFP_KERNEL);
1018                 of_data = of_id->data;
1019         } else {
1020                 info = pdev->dev.platform_data;
1021         }
1022
1023         if (!info) {
1024                 dev_err(dev, "driver needs R-Car sound information\n");
1025                 return -ENODEV;
1026         }
1027
1028         /*
1029          *      init priv data
1030          */
1031         priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
1032         if (!priv) {
1033                 dev_err(dev, "priv allocate failed\n");
1034                 return -ENODEV;
1035         }
1036
1037         priv->pdev      = pdev;
1038         priv->info      = info;
1039         spin_lock_init(&priv->lock);
1040
1041         /*
1042          *      init each module
1043          */
1044         for (i = 0; i < ARRAY_SIZE(probe_func); i++) {
1045                 ret = probe_func[i](pdev, of_data, priv);
1046                 if (ret)
1047                         return ret;
1048         }
1049
1050         for_each_rsnd_dai(rdai, priv, i) {
1051                 ret = rsnd_rdai_continuance_probe(priv, &rdai->playback);
1052                 if (ret)
1053                         goto exit_snd_probe;
1054
1055                 ret = rsnd_rdai_continuance_probe(priv, &rdai->capture);
1056                 if (ret)
1057                         goto exit_snd_probe;
1058         }
1059
1060         /*
1061          *      asoc register
1062          */
1063         ret = snd_soc_register_platform(dev, &rsnd_soc_platform);
1064         if (ret < 0) {
1065                 dev_err(dev, "cannot snd soc register\n");
1066                 return ret;
1067         }
1068
1069         ret = snd_soc_register_component(dev, &rsnd_soc_component,
1070                                          priv->daidrv, rsnd_rdai_nr(priv));
1071         if (ret < 0) {
1072                 dev_err(dev, "cannot snd dai register\n");
1073                 goto exit_snd_soc;
1074         }
1075
1076         dev_set_drvdata(dev, priv);
1077
1078         pm_runtime_enable(dev);
1079
1080         dev_info(dev, "probed\n");
1081         return ret;
1082
1083 exit_snd_soc:
1084         snd_soc_unregister_platform(dev);
1085 exit_snd_probe:
1086         for_each_rsnd_dai(rdai, priv, i) {
1087                 rsnd_dai_call(remove, &rdai->playback, priv);
1088                 rsnd_dai_call(remove, &rdai->capture, priv);
1089         }
1090
1091         return ret;
1092 }
1093
1094 static int rsnd_remove(struct platform_device *pdev)
1095 {
1096         struct rsnd_priv *priv = dev_get_drvdata(&pdev->dev);
1097         struct rsnd_dai *rdai;
1098         void (*remove_func[])(struct platform_device *pdev,
1099                               struct rsnd_priv *priv) = {
1100                 rsnd_ssi_remove,
1101                 rsnd_src_remove,
1102                 rsnd_dvc_remove,
1103         };
1104         int ret = 0, i;
1105
1106         pm_runtime_disable(&pdev->dev);
1107
1108         for_each_rsnd_dai(rdai, priv, i) {
1109                 ret |= rsnd_dai_call(remove, &rdai->playback, priv);
1110                 ret |= rsnd_dai_call(remove, &rdai->capture, priv);
1111         }
1112
1113         for (i = 0; i < ARRAY_SIZE(remove_func); i++)
1114                 remove_func[i](pdev, priv);
1115
1116         snd_soc_unregister_component(&pdev->dev);
1117         snd_soc_unregister_platform(&pdev->dev);
1118
1119         return ret;
1120 }
1121
1122 static struct platform_driver rsnd_driver = {
1123         .driver = {
1124                 .name   = "rcar_sound",
1125                 .of_match_table = rsnd_of_match,
1126         },
1127         .probe          = rsnd_probe,
1128         .remove         = rsnd_remove,
1129 };
1130 module_platform_driver(rsnd_driver);
1131
1132 MODULE_LICENSE("GPL");
1133 MODULE_DESCRIPTION("Renesas R-Car audio driver");
1134 MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");
1135 MODULE_ALIAS("platform:rcar-pcm-audio");