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_priv *priv,
 149                   struct rsnd_mod *mod,
 150                    struct rsnd_mod_ops *ops,
 151                    struct clk *clk,
 152                    enum rsnd_mod_type type,
 153                    int id)
 154 {
 155         int ret = clk_prepare(clk);
 156
 157         if (ret)
 158                 return ret;
 159
 160         mod->id         = id;
 161         mod->ops        = ops;
 162         mod->type       = type;
 163         mod->clk        = clk;
 164         mod->priv       = priv;
 165
 166         return ret;
 167 }
 168
 169 void rsnd_mod_quit(struct rsnd_mod *mod)
 170 {
 171         if (mod->clk)
 172                 clk_unprepare(mod->clk);
 173 }
 174
 175 int rsnd_mod_is_working(struct rsnd_mod *mod)
 176 {
 177         struct rsnd_dai_stream *io = rsnd_mod_to_io(mod);
 178
 179         /* see rsnd_dai_stream_init/quit() */
 180         return !!io->substream;
 181 }
 182
 183 /*
 184  *      settting function
 185  */
 186 u32 rsnd_get_adinr(struct rsnd_mod *mod)
 187 {
 188         struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
 189         struct rsnd_dai_stream *io = rsnd_mod_to_io(mod);
 190         struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
 191         struct device *dev = rsnd_priv_to_dev(priv);
 192         u32 adinr = runtime->channels;
 193
 194         switch (runtime->sample_bits) {
 195         case 16:
 196                 adinr |= (8 << 16);
 197                 break;
 198         case 32:
 199                 adinr |= (0 << 16);
 200                 break;
 201         default:
 202                 dev_warn(dev, "not supported sample bits\n");
 203                 return 0;
 204         }
 205
 206         return adinr;
 207 }
 208
 209 /*
 210  *      rsnd_dai functions
 211  */
 212 #define __rsnd_mod_call(mod, func, param...)                    \
 213 ({                                                              \
 214         struct rsnd_priv *priv = rsnd_mod_to_priv(mod);         \
 215         struct device *dev = rsnd_priv_to_dev(priv);            \
 216         u32 mask = 0xF << __rsnd_mod_shift_##func;                      \
 217         u8 val  = (mod->status >> __rsnd_mod_shift_##func) & 0xF;       \
 218         u8 add  = ((val + __rsnd_mod_add_##func) & 0xF);                \
 219         int ret = 0;                                                    \
 220         int called = 0;                                                 \
 221         if (val == __rsnd_mod_call_##func) {                            \
 222                 called = 1;                                             \
 223                 ret = (mod)->ops->func(mod, param);                     \
 224                 mod->status = (mod->status & ~mask) +                   \
 225                         (add << __rsnd_mod_shift_##func);               \
 226         }                                                               \
 227         dev_dbg(dev, "%s[%d] 0x%08x %s\n",                              \
 228                 rsnd_mod_name(mod), rsnd_mod_id(mod), mod->status,      \
 229                 called ? #func : "");                                   \
 230         ret;                                                            \
 231 })
 232
 233 #define rsnd_mod_call(mod, func, param...)      \
 234         (!(mod) ? -ENODEV :                     \
 235          !((mod)->ops->func) ? 0 :              \
 236          __rsnd_mod_call(mod, func, param))
 237
 238 #define rsnd_dai_call(fn, io, param...)                         \
 239 ({                                                              \
 240         struct rsnd_mod *mod;                                   \
 241         int ret = 0, i;                                         \
 242         for (i = 0; i < RSND_MOD_MAX; i++) {                    \
 243                 mod = (io)->mod[i];                             \
 244                 if (!mod)                                       \
 245                         continue;                               \
 246                 ret = rsnd_mod_call(mod, fn, param);            \
 247                 if (ret < 0)                                    \
 248                         break;                                  \
 249         }                                                       \
 250         ret;                                                    \
 251 })
 252
 253 static int rsnd_dai_connect(struct rsnd_mod *mod,
 254                             struct rsnd_dai_stream *io)
 255 {
 256         if (!mod)
 257                 return -EIO;
 258
 259         if (io->mod[mod->type]) {
 260                 struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
 261                 struct device *dev = rsnd_priv_to_dev(priv);
 262
 263                 dev_err(dev, "%s[%d] is not empty\n",
 264                         rsnd_mod_name(mod),
 265                         rsnd_mod_id(mod));
 266                 return -EIO;
 267         }
 268
 269         io->mod[mod->type] = mod;
 270         mod->io = io;
 271
 272         return 0;
 273 }
 274
 275 static void rsnd_dai_disconnect(struct rsnd_mod *mod,
 276                                 struct rsnd_dai_stream *io)
 277 {
 278         mod->io = NULL;
 279         io->mod[mod->type] = NULL;
 280 }
 281
 282 struct rsnd_dai *rsnd_rdai_get(struct rsnd_priv *priv, int id)
 283 {
 284         if ((id < 0) || (id >= rsnd_rdai_nr(priv)))
 285                 return NULL;
 286
 287         return priv->rdai + id;
 288 }
 289
 290 #define rsnd_dai_to_priv(dai) snd_soc_dai_get_drvdata(dai)
 291 static struct rsnd_dai *rsnd_dai_to_rdai(struct snd_soc_dai *dai)
 292 {
 293         struct rsnd_priv *priv = rsnd_dai_to_priv(dai);
 294
 295         return rsnd_rdai_get(priv, dai->id);
 296 }
 297
 298 /*
 299  *      rsnd_soc_dai functions
 300  */
 301 int rsnd_dai_pointer_offset(struct rsnd_dai_stream *io, int additional)
 302 {
 303         struct snd_pcm_substream *substream = io->substream;
 304         struct snd_pcm_runtime *runtime = substream->runtime;
 305         int pos = io->byte_pos + additional;
 306
 307         pos %= (runtime->periods * io->byte_per_period);
 308
 309         return pos;
 310 }
 311
 312 bool rsnd_dai_pointer_update(struct rsnd_dai_stream *io, int byte)
 313 {
 314         io->byte_pos += byte;
 315
 316         if (io->byte_pos >= io->next_period_byte) {
 317                 struct snd_pcm_substream *substream = io->substream;
 318                 struct snd_pcm_runtime *runtime = substream->runtime;
 319
 320                 io->period_pos++;
 321                 io->next_period_byte += io->byte_per_period;
 322
 323                 if (io->period_pos >= runtime->periods) {
 324                         io->byte_pos = 0;
 325                         io->period_pos = 0;
 326                         io->next_period_byte = io->byte_per_period;
 327                 }
 328
 329                 return true;
 330         }
 331
 332         return false;
 333 }
 334
 335 void rsnd_dai_period_elapsed(struct rsnd_dai_stream *io)
 336 {
 337         struct snd_pcm_substream *substream = io->substream;
 338
 339         /*
 340          * this function should be called...
 341          *
 342          * - if rsnd_dai_pointer_update() returns true
 343          * - without spin lock
 344          */
 345
 346         snd_pcm_period_elapsed(substream);
 347 }
 348
 349 static void rsnd_dai_stream_init(struct rsnd_dai_stream *io,
 350                                 struct snd_pcm_substream *substream)
 351 {
 352         struct snd_pcm_runtime *runtime = substream->runtime;
 353
 354         io->substream           = substream;
 355         io->byte_pos            = 0;
 356         io->period_pos          = 0;
 357         io->byte_per_period     = runtime->period_size *
 358                                   runtime->channels *
 359                                   samples_to_bytes(runtime, 1);
 360         io->next_period_byte    = io->byte_per_period;
 361 }
 362
 363 static void rsnd_dai_stream_quit(struct rsnd_dai_stream *io)
 364 {
 365         io->substream           = NULL;
 366 }
 367
 368 static
 369 struct snd_soc_dai *rsnd_substream_to_dai(struct snd_pcm_substream *substream)
 370 {
 371         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 372
 373         return  rtd->cpu_dai;
 374 }
 375
 376 static
 377 struct rsnd_dai_stream *rsnd_rdai_to_io(struct rsnd_dai *rdai,
 378                                         struct snd_pcm_substream *substream)
 379 {
 380         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 381                 return &rdai->playback;
 382         else
 383                 return &rdai->capture;
 384 }
 385
 386 static int rsnd_soc_dai_trigger(struct snd_pcm_substream *substream, int cmd,
 387                             struct snd_soc_dai *dai)
 388 {
 389         struct rsnd_priv *priv = rsnd_dai_to_priv(dai);
 390         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
 391         struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream);
 392         int ssi_id = rsnd_mod_id(rsnd_io_to_mod_ssi(io));
 393         int ret;
 394         unsigned long flags;
 395
 396         spin_lock_irqsave(&priv->lock, flags);
 397
 398         switch (cmd) {
 399         case SNDRV_PCM_TRIGGER_START:
 400                 rsnd_dai_stream_init(io, substream);
 401
 402                 ret = rsnd_platform_call(priv, dai, start, ssi_id);
 403                 if (ret < 0)
 404                         goto dai_trigger_end;
 405
 406                 ret = rsnd_dai_call(init, io, priv);
 407                 if (ret < 0)
 408                         goto dai_trigger_end;
 409
 410                 ret = rsnd_dai_call(start, io, priv);
 411                 if (ret < 0)
 412                         goto dai_trigger_end;
 413                 break;
 414         case SNDRV_PCM_TRIGGER_STOP:
 415                 ret = rsnd_dai_call(stop, io, priv);
 416                 if (ret < 0)
 417                         goto dai_trigger_end;
 418
 419                 ret = rsnd_dai_call(quit, io, priv);
 420                 if (ret < 0)
 421                         goto dai_trigger_end;
 422
 423                 ret = rsnd_platform_call(priv, dai, stop, ssi_id);
 424                 if (ret < 0)
 425                         goto dai_trigger_end;
 426
 427                 rsnd_dai_stream_quit(io);
 428                 break;
 429         default:
 430                 ret = -EINVAL;
 431         }
 432
 433 dai_trigger_end:
 434         spin_unlock_irqrestore(&priv->lock, flags);
 435
 436         return ret;
 437 }
 438
 439 static int rsnd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
 440 {
 441         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
 442
 443         /* set master/slave audio interface */
 444         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 445         case SND_SOC_DAIFMT_CBM_CFM:
 446                 rdai->clk_master = 0;
 447                 break;
 448         case SND_SOC_DAIFMT_CBS_CFS:
 449                 rdai->clk_master = 1; /* codec is slave, cpu is master */
 450                 break;
 451         default:
 452                 return -EINVAL;
 453         }
 454
 455         /* set format */
 456         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 457         case SND_SOC_DAIFMT_I2S:
 458                 rdai->sys_delay = 0;
 459                 rdai->data_alignment = 0;
 460                 rdai->frm_clk_inv = 0;
 461                 break;
 462         case SND_SOC_DAIFMT_LEFT_J:
 463                 rdai->sys_delay = 1;
 464                 rdai->data_alignment = 0;
 465                 rdai->frm_clk_inv = 1;
 466                 break;
 467         case SND_SOC_DAIFMT_RIGHT_J:
 468                 rdai->sys_delay = 1;
 469                 rdai->data_alignment = 1;
 470                 rdai->frm_clk_inv = 1;
 471                 break;
 472         }
 473
 474         /* set clock inversion */
 475         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
 476         case SND_SOC_DAIFMT_NB_IF:
 477                 rdai->bit_clk_inv =  rdai->bit_clk_inv;
 478                 rdai->frm_clk_inv = !rdai->frm_clk_inv;
 479                 break;
 480         case SND_SOC_DAIFMT_IB_NF:
 481                 rdai->bit_clk_inv = !rdai->bit_clk_inv;
 482                 rdai->frm_clk_inv =  rdai->frm_clk_inv;
 483                 break;
 484         case SND_SOC_DAIFMT_IB_IF:
 485                 rdai->bit_clk_inv = !rdai->bit_clk_inv;
 486                 rdai->frm_clk_inv = !rdai->frm_clk_inv;
 487                 break;
 488         case SND_SOC_DAIFMT_NB_NF:
 489         default:
 490                 break;
 491         }
 492
 493         return 0;
 494 }
 495
 496 static const struct snd_soc_dai_ops rsnd_soc_dai_ops = {
 497         .trigger        = rsnd_soc_dai_trigger,
 498         .set_fmt        = rsnd_soc_dai_set_fmt,
 499 };
 500
 501 #define rsnd_path_parse(priv, io, type)                         \
 502 ({                                                              \
 503         struct rsnd_mod *mod;                                   \
 504         int ret = 0;                                            \
 505         int id = -1;                                            \
 506                                                                 \
 507         if (rsnd_is_enable_path(io, type)) {                    \
 508                 id = rsnd_info_id(priv, io, type);              \
 509                 if (id >= 0) {                                  \
 510                         mod = rsnd_##type##_mod_get(priv, id);  \
 511                         ret = rsnd_dai_connect(mod, io);        \
 512                 }                                               \
 513         }                                                       \
 514         ret;                                                    \
 515 })
 516
 517 #define rsnd_path_break(priv, io, type)                         \
 518 {                                                               \
 519         struct rsnd_mod *mod;                                   \
 520         int id = -1;                                            \
 521                                                                 \
 522         if (rsnd_is_enable_path(io, type)) {                    \
 523                 id = rsnd_info_id(priv, io, type);              \
 524                 if (id >= 0) {                                  \
 525                         mod = rsnd_##type##_mod_get(priv, id);  \
 526                         rsnd_dai_disconnect(mod, io);           \
 527                 }                                               \
 528         }                                                       \
 529 }
 530
 531 static int rsnd_path_init(struct rsnd_priv *priv,
 532                           struct rsnd_dai *rdai,
 533                           struct rsnd_dai_stream *io)
 534 {
 535         int ret;
 536
 537         /*
 538          * Gen1 is created by SRU/SSI, and this SRU is base module of
 539          * Gen2's SCU/SSIU/SSI. (Gen2 SCU/SSIU came from SRU)
 540          *
 541          * Easy image is..
 542          *      Gen1 SRU = Gen2 SCU + SSIU + etc
 543          *
 544          * Gen2 SCU path is very flexible, but, Gen1 SRU (SCU parts) is
 545          * using fixed path.
 546          */
 547
 548         /* SRC */
 549         ret = rsnd_path_parse(priv, io, src);
 550         if (ret < 0)
 551                 return ret;
 552
 553         /* SSI */
 554         ret = rsnd_path_parse(priv, io, ssi);
 555         if (ret < 0)
 556                 return ret;
 557
 558         /* DVC */
 559         ret = rsnd_path_parse(priv, io, dvc);
 560         if (ret < 0)
 561                 return ret;
 562
 563         return ret;
 564 }
 565
 566 static void rsnd_of_parse_dai(struct platform_device *pdev,
 567                               const struct rsnd_of_data *of_data,
 568                               struct rsnd_priv *priv)
 569 {
 570         struct device_node *dai_node,   *dai_np;
 571         struct device_node *ssi_node,   *ssi_np;
 572         struct device_node *src_node,   *src_np;
 573         struct device_node *dvc_node,   *dvc_np;
 574         struct device_node *playback, *capture;
 575         struct rsnd_dai_platform_info *dai_info;
 576         struct rcar_snd_info *info = rsnd_priv_to_info(priv);
 577         struct device *dev = &pdev->dev;
 578         int nr, i;
 579         int dai_i, ssi_i, src_i, dvc_i;
 580
 581         if (!of_data)
 582                 return;
 583
 584         dai_node = of_get_child_by_name(dev->of_node, "rcar_sound,dai");
 585         if (!dai_node)
 586                 return;
 587
 588         nr = of_get_child_count(dai_node);
 589         if (!nr)
 590                 return;
 591
 592         dai_info = devm_kzalloc(dev,
 593                                 sizeof(struct rsnd_dai_platform_info) * nr,
 594                                 GFP_KERNEL);
 595         if (!dai_info) {
 596                 dev_err(dev, "dai info allocation error\n");
 597                 return;
 598         }
 599
 600         info->dai_info_nr       = nr;
 601         info->dai_info          = dai_info;
 602
 603         ssi_node = of_get_child_by_name(dev->of_node, "rcar_sound,ssi");
 604         src_node = of_get_child_by_name(dev->of_node, "rcar_sound,src");
 605         dvc_node = of_get_child_by_name(dev->of_node, "rcar_sound,dvc");
 606
 607 #define mod_parse(name)                                                 \
 608 if (name##_node) {                                                      \
 609         struct rsnd_##name##_platform_info *name##_info;                \
 610                                                                         \
 611         name##_i = 0;                                                   \
 612         for_each_child_of_node(name##_node, name##_np) {                \
 613                 name##_info = info->name##_info + name##_i;             \
 614                                                                         \
 615                 if (name##_np == playback)                              \
 616                         dai_info->playback.name = name##_info;          \
 617                 if (name##_np == capture)                               \
 618                         dai_info->capture.name = name##_info;           \
 619                                                                         \
 620                 name##_i++;                                             \
 621         }                                                               \
 622 }
 623
 624         /*
 625          * parse all dai
 626          */
 627         dai_i = 0;
 628         for_each_child_of_node(dai_node, dai_np) {
 629                 dai_info = info->dai_info + dai_i;
 630
 631                 for (i = 0;; i++) {
 632
 633                         playback = of_parse_phandle(dai_np, "playback", i);
 634                         capture  = of_parse_phandle(dai_np, "capture", i);
 635
 636                         if (!playback && !capture)
 637                                 break;
 638
 639                         mod_parse(ssi);
 640                         mod_parse(src);
 641                         mod_parse(dvc);
 642
 643                         of_node_put(playback);
 644                         of_node_put(capture);
 645                 }
 646
 647                 dai_i++;
 648         }
 649 }
 650
 651 static int rsnd_dai_probe(struct platform_device *pdev,
 652                           const struct rsnd_of_data *of_data,
 653                           struct rsnd_priv *priv)
 654 {
 655         struct snd_soc_dai_driver *drv;
 656         struct rcar_snd_info *info = rsnd_priv_to_info(priv);
 657         struct rsnd_dai *rdai;
 658         struct rsnd_ssi_platform_info *pmod, *cmod;
 659         struct device *dev = rsnd_priv_to_dev(priv);
 660         int dai_nr;
 661         int i;
 662
 663         rsnd_of_parse_dai(pdev, of_data, priv);
 664
 665         dai_nr = info->dai_info_nr;
 666         if (!dai_nr) {
 667                 dev_err(dev, "no dai\n");
 668                 return -EIO;
 669         }
 670
 671         drv  = devm_kzalloc(dev, sizeof(*drv)  * dai_nr, GFP_KERNEL);
 672         rdai = devm_kzalloc(dev, sizeof(*rdai) * dai_nr, GFP_KERNEL);
 673         if (!drv || !rdai) {
 674                 dev_err(dev, "dai allocate failed\n");
 675                 return -ENOMEM;
 676         }
 677
 678         priv->rdai_nr   = dai_nr;
 679         priv->daidrv    = drv;
 680         priv->rdai      = rdai;
 681
 682         for (i = 0; i < dai_nr; i++) {
 683
 684                 pmod = info->dai_info[i].playback.ssi;
 685                 cmod = info->dai_info[i].capture.ssi;
 686
 687                 /*
 688                  *      init rsnd_dai
 689                  */
 690                 snprintf(rdai[i].name, RSND_DAI_NAME_SIZE, "rsnd-dai.%d", i);
 691                 rdai[i].priv = priv;
 692
 693                 /*
 694                  *      init snd_soc_dai_driver
 695                  */
 696                 drv[i].name     = rdai[i].name;
 697                 drv[i].ops      = &rsnd_soc_dai_ops;
 698                 if (pmod) {
 699                         snprintf(rdai[i].playback.name, RSND_DAI_NAME_SIZE,
 700                                  "DAI%d Playback", i);
 701
 702                         drv[i].playback.rates           = RSND_RATES;
 703                         drv[i].playback.formats         = RSND_FMTS;
 704                         drv[i].playback.channels_min    = 2;
 705                         drv[i].playback.channels_max    = 2;
 706                         drv[i].playback.stream_name     = rdai[i].playback.name;
 707
 708                         rdai[i].playback.info = &info->dai_info[i].playback;
 709                         rdai[i].playback.rdai = rdai + i;
 710                         rsnd_path_init(priv, &rdai[i], &rdai[i].playback);
 711                 }
 712                 if (cmod) {
 713                         snprintf(rdai[i].capture.name, RSND_DAI_NAME_SIZE,
 714                                  "DAI%d Capture", i);
 715
 716                         drv[i].capture.rates            = RSND_RATES;
 717                         drv[i].capture.formats          = RSND_FMTS;
 718                         drv[i].capture.channels_min     = 2;
 719                         drv[i].capture.channels_max     = 2;
 720                         drv[i].capture.stream_name      = rdai[i].capture.name;
 721
 722                         rdai[i].capture.info = &info->dai_info[i].capture;
 723                         rdai[i].capture.rdai = rdai + i;
 724                         rsnd_path_init(priv, &rdai[i], &rdai[i].capture);
 725                 }
 726
 727                 dev_dbg(dev, "%s (%s/%s)\n", rdai[i].name,
 728                         pmod ? "play"    : " -- ",
 729                         cmod ? "capture" : "  --   ");
 730         }
 731
 732         return 0;
 733 }
 734
 735 /*
 736  *              pcm ops
 737  */
 738 static struct snd_pcm_hardware rsnd_pcm_hardware = {
 739         .info =         SNDRV_PCM_INFO_INTERLEAVED      |
 740                         SNDRV_PCM_INFO_MMAP             |
 741                         SNDRV_PCM_INFO_MMAP_VALID,
 742         .buffer_bytes_max       = 64 * 1024,
 743         .period_bytes_min       = 32,
 744         .period_bytes_max       = 8192,
 745         .periods_min            = 1,
 746         .periods_max            = 32,
 747         .fifo_size              = 256,
 748 };
 749
 750 static int rsnd_pcm_open(struct snd_pcm_substream *substream)
 751 {
 752         struct snd_pcm_runtime *runtime = substream->runtime;
 753         int ret = 0;
 754
 755         snd_soc_set_runtime_hwparams(substream, &rsnd_pcm_hardware);
 756
 757         ret = snd_pcm_hw_constraint_integer(runtime,
 758                                             SNDRV_PCM_HW_PARAM_PERIODS);
 759
 760         return ret;
 761 }
 762
 763 static int rsnd_hw_params(struct snd_pcm_substream *substream,
 764                          struct snd_pcm_hw_params *hw_params)
 765 {
 766         struct snd_soc_dai *dai = rsnd_substream_to_dai(substream);
 767         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
 768         struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream);
 769         int ret;
 770
 771         ret = rsnd_dai_call(hw_params, io, substream, hw_params);
 772         if (ret)
 773                 return ret;
 774
 775         return snd_pcm_lib_malloc_pages(substream,
 776                                         params_buffer_bytes(hw_params));
 777 }
 778
 779 static snd_pcm_uframes_t rsnd_pointer(struct snd_pcm_substream *substream)
 780 {
 781         struct snd_pcm_runtime *runtime = substream->runtime;
 782         struct snd_soc_dai *dai = rsnd_substream_to_dai(substream);
 783         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
 784         struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream);
 785
 786         return bytes_to_frames(runtime, io->byte_pos);
 787 }
 788
 789 static struct snd_pcm_ops rsnd_pcm_ops = {
 790         .open           = rsnd_pcm_open,
 791         .ioctl          = snd_pcm_lib_ioctl,
 792         .hw_params      = rsnd_hw_params,
 793         .hw_free        = snd_pcm_lib_free_pages,
 794         .pointer        = rsnd_pointer,
 795 };
 796
 797 /*
 798  *              snd_kcontrol
 799  */
 800 #define kcontrol_to_cfg(kctrl) ((struct rsnd_kctrl_cfg *)kctrl->private_value)
 801 static int rsnd_kctrl_info(struct snd_kcontrol *kctrl,
 802                            struct snd_ctl_elem_info *uinfo)
 803 {
 804         struct rsnd_kctrl_cfg *cfg = kcontrol_to_cfg(kctrl);
 805
 806         if (cfg->texts) {
 807                 uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
 808                 uinfo->count = cfg->size;
 809                 uinfo->value.enumerated.items = cfg->max;
 810                 if (uinfo->value.enumerated.item >= cfg->max)
 811                         uinfo->value.enumerated.item = cfg->max - 1;
 812                 strlcpy(uinfo->value.enumerated.name,
 813                         cfg->texts[uinfo->value.enumerated.item],
 814                         sizeof(uinfo->value.enumerated.name));
 815         } else {
 816                 uinfo->count = cfg->size;
 817                 uinfo->value.integer.min = 0;
 818                 uinfo->value.integer.max = cfg->max;
 819                 uinfo->type = (cfg->max == 1) ?
 820                         SNDRV_CTL_ELEM_TYPE_BOOLEAN :
 821                         SNDRV_CTL_ELEM_TYPE_INTEGER;
 822         }
 823
 824         return 0;
 825 }
 826
 827 static int rsnd_kctrl_get(struct snd_kcontrol *kctrl,
 828                           struct snd_ctl_elem_value *uc)
 829 {
 830         struct rsnd_kctrl_cfg *cfg = kcontrol_to_cfg(kctrl);
 831         int i;
 832
 833         for (i = 0; i < cfg->size; i++)
 834                 if (cfg->texts)
 835                         uc->value.enumerated.item[i] = cfg->val[i];
 836                 else
 837                         uc->value.integer.value[i] = cfg->val[i];
 838
 839         return 0;
 840 }
 841
 842 static int rsnd_kctrl_put(struct snd_kcontrol *kctrl,
 843                           struct snd_ctl_elem_value *uc)
 844 {
 845         struct rsnd_mod *mod = snd_kcontrol_chip(kctrl);
 846         struct rsnd_kctrl_cfg *cfg = kcontrol_to_cfg(kctrl);
 847         int i, change = 0;
 848
 849         for (i = 0; i < cfg->size; i++) {
 850                 if (cfg->texts) {
 851                         change |= (uc->value.enumerated.item[i] != cfg->val[i]);
 852                         cfg->val[i] = uc->value.enumerated.item[i];
 853                 } else {
 854                         change |= (uc->value.integer.value[i] != cfg->val[i]);
 855                         cfg->val[i] = uc->value.integer.value[i];
 856                 }
 857         }
 858
 859         if (change)
 860                 cfg->update(mod);
 861
 862         return change;
 863 }
 864
 865 static int __rsnd_kctrl_new(struct rsnd_mod *mod,
 866                             struct snd_soc_pcm_runtime *rtd,
 867                             const unsigned char *name,
 868                             struct rsnd_kctrl_cfg *cfg,
 869                             void (*update)(struct rsnd_mod *mod))
 870 {
 871         struct snd_soc_card *soc_card = rtd->card;
 872         struct snd_card *card = rtd->card->snd_card;
 873         struct snd_kcontrol *kctrl;
 874         struct snd_kcontrol_new knew = {
 875                 .iface          = SNDRV_CTL_ELEM_IFACE_MIXER,
 876                 .name           = name,
 877                 .info           = rsnd_kctrl_info,
 878                 .index          = rtd - soc_card->rtd,
 879                 .get            = rsnd_kctrl_get,
 880                 .put            = rsnd_kctrl_put,
 881                 .private_value  = (unsigned long)cfg,
 882         };
 883         int ret;
 884
 885         kctrl = snd_ctl_new1(&knew, mod);
 886         if (!kctrl)
 887                 return -ENOMEM;
 888
 889         ret = snd_ctl_add(card, kctrl);
 890         if (ret < 0) {
 891                 snd_ctl_free_one(kctrl);
 892                 return ret;
 893         }
 894
 895         cfg->update = update;
 896         cfg->card = card;
 897         cfg->kctrl = kctrl;
 898
 899         return 0;
 900 }
 901
 902 void _rsnd_kctrl_remove(struct rsnd_kctrl_cfg *cfg)
 903 {
 904         snd_ctl_remove(cfg->card, cfg->kctrl);
 905 }
 906
 907 int rsnd_kctrl_new_m(struct rsnd_mod *mod,
 908                      struct snd_soc_pcm_runtime *rtd,
 909                      const unsigned char *name,
 910                      void (*update)(struct rsnd_mod *mod),
 911                      struct rsnd_kctrl_cfg_m *_cfg,
 912                      u32 max)
 913 {
 914         _cfg->cfg.max   = max;
 915         _cfg->cfg.size  = RSND_DVC_CHANNELS;
 916         _cfg->cfg.val   = _cfg->val;
 917         return __rsnd_kctrl_new(mod, rtd, name, &_cfg->cfg, update);
 918 }
 919
 920 int rsnd_kctrl_new_s(struct rsnd_mod *mod,
 921                      struct snd_soc_pcm_runtime *rtd,
 922                      const unsigned char *name,
 923                      void (*update)(struct rsnd_mod *mod),
 924                      struct rsnd_kctrl_cfg_s *_cfg,
 925                      u32 max)
 926 {
 927         _cfg->cfg.max   = max;
 928         _cfg->cfg.size  = 1;
 929         _cfg->cfg.val   = &_cfg->val;
 930         return __rsnd_kctrl_new(mod, rtd, name, &_cfg->cfg, update);
 931 }
 932
 933 int rsnd_kctrl_new_e(struct rsnd_mod *mod,
 934                      struct snd_soc_pcm_runtime *rtd,
 935                      const unsigned char *name,
 936                      struct rsnd_kctrl_cfg_s *_cfg,
 937                      void (*update)(struct rsnd_mod *mod),
 938                      const char * const *texts,
 939                      u32 max)
 940 {
 941         _cfg->cfg.max   = max;
 942         _cfg->cfg.size  = 1;
 943         _cfg->cfg.val   = &_cfg->val;
 944         _cfg->cfg.texts = texts;
 945         return __rsnd_kctrl_new(mod, rtd, name, &_cfg->cfg, update);
 946 }
 947
 948 /*
 949  *              snd_soc_platform
 950  */
 951
 952 #define PREALLOC_BUFFER         (32 * 1024)
 953 #define PREALLOC_BUFFER_MAX     (32 * 1024)
 954
 955 static int rsnd_pcm_new(struct snd_soc_pcm_runtime *rtd)
 956 {
 957         struct snd_soc_dai *dai = rtd->cpu_dai;
 958         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
 959         int ret;
 960
 961         ret = rsnd_dai_call(pcm_new, &rdai->playback, rtd);
 962         if (ret)
 963                 return ret;
 964
 965         ret = rsnd_dai_call(pcm_new, &rdai->capture, rtd);
 966         if (ret)
 967                 return ret;
 968
 969         return snd_pcm_lib_preallocate_pages_for_all(
 970                 rtd->pcm,
 971                 SNDRV_DMA_TYPE_DEV,
 972                 rtd->card->snd_card->dev,
 973                 PREALLOC_BUFFER, PREALLOC_BUFFER_MAX);
 974 }
 975
 976 static struct snd_soc_platform_driver rsnd_soc_platform = {
 977         .ops            = &rsnd_pcm_ops,
 978         .pcm_new        = rsnd_pcm_new,
 979 };
 980
 981 static const struct snd_soc_component_driver rsnd_soc_component = {
 982         .name           = "rsnd",
 983 };
 984
 985 static int rsnd_rdai_continuance_probe(struct rsnd_priv *priv,
 986                                        struct rsnd_dai_stream *io)
 987 {
 988         int ret;
 989
 990         ret = rsnd_dai_call(probe, io, priv);
 991         if (ret == -EAGAIN) {
 992                 /*
 993                  * Fallback to PIO mode
 994                  */
 995
 996                 /*
 997                  * call "remove" for SSI/SRC/DVC
 998                  * SSI will be switch to PIO mode if it was DMA mode
 999                  * see
1000                  *      rsnd_dma_init()
1001                  *      rsnd_ssi_fallback()
1002                  */
1003                 rsnd_dai_call(remove, io, priv);
1004
1005                 /*
1006                  * remove SRC/DVC from DAI,
1007                  */
1008                 rsnd_path_break(priv, io, src);
1009                 rsnd_path_break(priv, io, dvc);
1010
1011                 /*
1012                  * fallback
1013                  */
1014                 rsnd_dai_call(fallback, io, priv);
1015
1016                 /*
1017                  * retry to "probe".
1018                  * DAI has SSI which is PIO mode only now.
1019                  */
1020                 ret = rsnd_dai_call(probe, io, priv);
1021         }
1022
1023         return ret;
1024 }
1025
1026 /*
1027  *      rsnd probe
1028  */
1029 static int rsnd_probe(struct platform_device *pdev)
1030 {
1031         struct rcar_snd_info *info;
1032         struct rsnd_priv *priv;
1033         struct device *dev = &pdev->dev;
1034         struct rsnd_dai *rdai;
1035         const struct of_device_id *of_id = of_match_device(rsnd_of_match, dev);
1036         const struct rsnd_of_data *of_data;
1037         int (*probe_func[])(struct platform_device *pdev,
1038                             const struct rsnd_of_data *of_data,
1039                             struct rsnd_priv *priv) = {
1040                 rsnd_gen_probe,
1041                 rsnd_dma_probe,
1042                 rsnd_ssi_probe,
1043                 rsnd_src_probe,
1044                 rsnd_dvc_probe,
1045                 rsnd_adg_probe,
1046                 rsnd_dai_probe,
1047         };
1048         int ret, i;
1049
1050         info = NULL;
1051         of_data = NULL;
1052         if (of_id) {
1053                 info = devm_kzalloc(&pdev->dev,
1054                                     sizeof(struct rcar_snd_info), GFP_KERNEL);
1055                 of_data = of_id->data;
1056         } else {
1057                 info = pdev->dev.platform_data;
1058         }
1059
1060         if (!info) {
1061                 dev_err(dev, "driver needs R-Car sound information\n");
1062                 return -ENODEV;
1063         }
1064
1065         /*
1066          *      init priv data
1067          */
1068         priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
1069         if (!priv) {
1070                 dev_err(dev, "priv allocate failed\n");
1071                 return -ENODEV;
1072         }
1073
1074         priv->pdev      = pdev;
1075         priv->info      = info;
1076         spin_lock_init(&priv->lock);
1077
1078         /*
1079          *      init each module
1080          */
1081         for (i = 0; i < ARRAY_SIZE(probe_func); i++) {
1082                 ret = probe_func[i](pdev, of_data, priv);
1083                 if (ret)
1084                         return ret;
1085         }
1086
1087         for_each_rsnd_dai(rdai, priv, i) {
1088                 ret = rsnd_rdai_continuance_probe(priv, &rdai->playback);
1089                 if (ret)
1090                         goto exit_snd_probe;
1091
1092                 ret = rsnd_rdai_continuance_probe(priv, &rdai->capture);
1093                 if (ret)
1094                         goto exit_snd_probe;
1095         }
1096
1097         dev_set_drvdata(dev, priv);
1098
1099         /*
1100          *      asoc register
1101          */
1102         ret = snd_soc_register_platform(dev, &rsnd_soc_platform);
1103         if (ret < 0) {
1104                 dev_err(dev, "cannot snd soc register\n");
1105                 return ret;
1106         }
1107
1108         ret = snd_soc_register_component(dev, &rsnd_soc_component,
1109                                          priv->daidrv, rsnd_rdai_nr(priv));
1110         if (ret < 0) {
1111                 dev_err(dev, "cannot snd dai register\n");
1112                 goto exit_snd_soc;
1113         }
1114
1115         pm_runtime_enable(dev);
1116
1117         dev_info(dev, "probed\n");
1118         return ret;
1119
1120 exit_snd_soc:
1121         snd_soc_unregister_platform(dev);
1122 exit_snd_probe:
1123         for_each_rsnd_dai(rdai, priv, i) {
1124                 rsnd_dai_call(remove, &rdai->playback, priv);
1125                 rsnd_dai_call(remove, &rdai->capture, priv);
1126         }
1127
1128         return ret;
1129 }
1130
1131 static int rsnd_remove(struct platform_device *pdev)
1132 {
1133         struct rsnd_priv *priv = dev_get_drvdata(&pdev->dev);
1134         struct rsnd_dai *rdai;
1135         void (*remove_func[])(struct platform_device *pdev,
1136                               struct rsnd_priv *priv) = {
1137                 rsnd_ssi_remove,
1138                 rsnd_src_remove,
1139                 rsnd_dvc_remove,
1140         };
1141         int ret = 0, i;
1142
1143         pm_runtime_disable(&pdev->dev);
1144
1145         for_each_rsnd_dai(rdai, priv, i) {
1146                 ret |= rsnd_dai_call(remove, &rdai->playback, priv);
1147                 ret |= rsnd_dai_call(remove, &rdai->capture, priv);
1148         }
1149
1150         for (i = 0; i < ARRAY_SIZE(remove_func); i++)
1151                 remove_func[i](pdev, priv);
1152
1153         snd_soc_unregister_component(&pdev->dev);
1154         snd_soc_unregister_platform(&pdev->dev);
1155
1156         return ret;
1157 }
1158
1159 static struct platform_driver rsnd_driver = {
1160         .driver = {
1161                 .name   = "rcar_sound",
1162                 .of_match_table = rsnd_of_match,
1163         },
1164         .probe          = rsnd_probe,
1165         .remove         = rsnd_remove,
1166 };
1167 module_platform_driver(rsnd_driver);
1168
1169 MODULE_LICENSE("GPL");
1170 MODULE_DESCRIPTION("Renesas R-Car audio driver");
1171 MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");
1172 MODULE_ALIAS("platform:rcar-pcm-audio");