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 of_device_id rsnd_of_match[] = {
 103         { .compatible = "renesas,rcar_sound-gen1", .data = (void *)RSND_GEN1 },
 104         { .compatible = "renesas,rcar_sound-gen2", .data = (void *)RSND_GEN2 },
 105         { .compatible = "renesas,rcar_sound-gen3", .data = (void *)RSND_GEN2 }, /* gen2 compatible */
 106         {},
 107 };
 108 MODULE_DEVICE_TABLE(of, rsnd_of_match);
 109
 110 /*
 111  *      rsnd_mod functions
 112  */
 113 void rsnd_mod_make_sure(struct rsnd_mod *mod, enum rsnd_mod_type type)
 114 {
 115         if (mod->type != type) {
 116                 struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
 117                 struct device *dev = rsnd_priv_to_dev(priv);
 118
 119                 dev_warn(dev, "%s[%d] is not your expected module\n",
 120                          rsnd_mod_name(mod), rsnd_mod_id(mod));
 121         }
 122 }
 123
 124 char *rsnd_mod_name(struct rsnd_mod *mod)
 125 {
 126         if (!mod || !mod->ops)
 127                 return "unknown";
 128
 129         return mod->ops->name;
 130 }
 131
 132 struct dma_chan *rsnd_mod_dma_req(struct rsnd_dai_stream *io,
 133                                   struct rsnd_mod *mod)
 134 {
 135         if (!mod || !mod->ops || !mod->ops->dma_req)
 136                 return NULL;
 137
 138         return mod->ops->dma_req(io, mod);
 139 }
 140
 141 u32 *rsnd_mod_get_status(struct rsnd_dai_stream *io,
 142                          struct rsnd_mod *mod,
 143                          enum rsnd_mod_type type)
 144 {
 145         return &mod->status;
 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                   u32* (*get_status)(struct rsnd_dai_stream *io,
 153                                      struct rsnd_mod *mod,
 154                                      enum rsnd_mod_type type),
 155                   enum rsnd_mod_type type,
 156                   int id)
 157 {
 158         int ret = clk_prepare(clk);
 159
 160         if (ret)
 161                 return ret;
 162
 163         mod->id         = id;
 164         mod->ops        = ops;
 165         mod->type       = type;
 166         mod->clk        = clk;
 167         mod->priv       = priv;
 168         mod->get_status = get_status;
 169
 170         return ret;
 171 }
 172
 173 void rsnd_mod_quit(struct rsnd_mod *mod)
 174 {
 175         if (mod->clk)
 176                 clk_unprepare(mod->clk);
 177         mod->clk = NULL;
 178 }
 179
 180 void rsnd_mod_interrupt(struct rsnd_mod *mod,
 181                         void (*callback)(struct rsnd_mod *mod,
 182                                          struct rsnd_dai_stream *io))
 183 {
 184         struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
 185         struct rsnd_dai_stream *io;
 186         struct rsnd_dai *rdai;
 187         int i;
 188
 189         for_each_rsnd_dai(rdai, priv, i) {
 190                 io = &rdai->playback;
 191                 if (mod == io->mod[mod->type])
 192                         callback(mod, io);
 193
 194                 io = &rdai->capture;
 195                 if (mod == io->mod[mod->type])
 196                         callback(mod, io);
 197         }
 198 }
 199
 200 int rsnd_io_is_working(struct rsnd_dai_stream *io)
 201 {
 202         /* see rsnd_dai_stream_init/quit() */
 203         return !!io->substream;
 204 }
 205
 206 void rsnd_set_slot(struct rsnd_dai *rdai,
 207                    int slots, int num)
 208 {
 209         rdai->slots     = slots;
 210         rdai->slots_num = num;
 211 }
 212
 213 int rsnd_get_slot(struct rsnd_dai_stream *io)
 214 {
 215         struct rsnd_dai *rdai = rsnd_io_to_rdai(io);
 216
 217         return rdai->slots;
 218 }
 219
 220 int rsnd_get_slot_num(struct rsnd_dai_stream *io)
 221 {
 222         struct rsnd_dai *rdai = rsnd_io_to_rdai(io);
 223
 224         return rdai->slots_num;
 225 }
 226
 227 int rsnd_get_slot_width(struct rsnd_dai_stream *io)
 228 {
 229         struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
 230         int chan = runtime->channels;
 231
 232         /* Multi channel Mode */
 233         if (rsnd_ssi_multi_slaves(io))
 234                 chan /= rsnd_get_slot_num(io);
 235
 236         /* TDM Extend Mode needs 8ch */
 237         if (chan == 6)
 238                 chan = 8;
 239
 240         return chan;
 241 }
 242
 243 /*
 244  *      ADINR function
 245  */
 246 u32 rsnd_get_adinr_bit(struct rsnd_mod *mod, struct rsnd_dai_stream *io)
 247 {
 248         struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
 249         struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
 250         struct device *dev = rsnd_priv_to_dev(priv);
 251
 252         switch (runtime->sample_bits) {
 253         case 16:
 254                 return 8 << 16;
 255         case 32:
 256                 return 0 << 16;
 257         }
 258
 259         dev_warn(dev, "not supported sample bits\n");
 260
 261         return 0;
 262 }
 263
 264 u32 rsnd_get_adinr_chan(struct rsnd_mod *mod, struct rsnd_dai_stream *io)
 265 {
 266         struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
 267         struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
 268         struct device *dev = rsnd_priv_to_dev(priv);
 269         u32 chan = runtime->channels;
 270
 271         switch (chan) {
 272         case 1:
 273         case 2:
 274         case 4:
 275         case 6:
 276         case 8:
 277                 break;
 278         default:
 279                 dev_warn(dev, "not supported channel\n");
 280                 chan = 0;
 281                 break;
 282         }
 283
 284         return chan;
 285 }
 286
 287 /*
 288  *      DALIGN function
 289  */
 290 u32 rsnd_get_dalign(struct rsnd_mod *mod, struct rsnd_dai_stream *io)
 291 {
 292         struct rsnd_mod *ssi = rsnd_io_to_mod_ssi(io);
 293         struct rsnd_mod *target;
 294         struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
 295         u32 val = 0x76543210;
 296         u32 mask = ~0;
 297
 298         if (rsnd_io_is_play(io)) {
 299                 struct rsnd_mod *src = rsnd_io_to_mod_src(io);
 300
 301                 target = src ? src : ssi;
 302         } else {
 303                 struct rsnd_mod *cmd = rsnd_io_to_mod_cmd(io);
 304
 305                 target = cmd ? cmd : ssi;
 306         }
 307
 308         mask <<= runtime->channels * 4;
 309         val = val & mask;
 310
 311         switch (runtime->sample_bits) {
 312         case 16:
 313                 val |= 0x67452301 & ~mask;
 314                 break;
 315         case 32:
 316                 val |= 0x76543210 & ~mask;
 317                 break;
 318         }
 319
 320         /*
 321          * exchange channeles on SRC if possible,
 322          * otherwise, R/L volume settings on DVC
 323          * changes inverted channels
 324          */
 325         if (mod == target)
 326                 return val;
 327         else
 328                 return 0x76543210;
 329 }
 330
 331 /*
 332  *      rsnd_dai functions
 333  */
 334 #define rsnd_mod_call(idx, io, func, param...)                  \
 335 ({                                                              \
 336         struct rsnd_priv *priv = rsnd_mod_to_priv(mod);         \
 337         struct rsnd_mod *mod = (io)->mod[idx];                  \
 338         struct device *dev = rsnd_priv_to_dev(priv);            \
 339         u32 *status = mod->get_status(io, mod, idx);                    \
 340         u32 mask = 0xF << __rsnd_mod_shift_##func;                      \
 341         u8 val  = (*status >> __rsnd_mod_shift_##func) & 0xF;           \
 342         u8 add  = ((val + __rsnd_mod_add_##func) & 0xF);                \
 343         int ret = 0;                                                    \
 344         int call = (val == __rsnd_mod_call_##func) && (mod)->ops->func; \
 345         if (add == 0xF)                                                 \
 346                 call = 0;                                               \
 347         else                                                            \
 348                 *status = (*status & ~mask) +                           \
 349                         (add << __rsnd_mod_shift_##func);               \
 350         dev_dbg(dev, "%s[%d]\t0x%08x %s\n",                             \
 351                 rsnd_mod_name(mod), rsnd_mod_id(mod),                   \
 352                 *status, call ? #func : "");                            \
 353         if (call)                                                       \
 354                 ret = (mod)->ops->func(mod, io, param);                 \
 355         if (ret)                                                        \
 356                 dev_dbg(dev, "%s[%d] : rsnd_mod_call error %d\n",       \
 357                         rsnd_mod_name(mod), rsnd_mod_id(mod), ret);     \
 358         ret;                                                            \
 359 })
 360
 361 #define rsnd_dai_call(fn, io, param...)                         \
 362 ({                                                              \
 363         struct rsnd_mod *mod;                                   \
 364         int ret = 0, i;                                         \
 365         for (i = 0; i < RSND_MOD_MAX; i++) {                    \
 366                 mod = (io)->mod[i];                             \
 367                 if (!mod)                                       \
 368                         continue;                               \
 369                 ret |= rsnd_mod_call(i, io, fn, param);         \
 370         }                                                       \
 371         ret;                                                    \
 372 })
 373
 374 int rsnd_dai_connect(struct rsnd_mod *mod,
 375                      struct rsnd_dai_stream *io,
 376                      enum rsnd_mod_type type)
 377 {
 378         struct rsnd_priv *priv;
 379         struct device *dev;
 380
 381         if (!mod)
 382                 return -EIO;
 383
 384         if (io->mod[type] == mod)
 385                 return 0;
 386
 387         if (io->mod[type])
 388                 return -EINVAL;
 389
 390         priv = rsnd_mod_to_priv(mod);
 391         dev = rsnd_priv_to_dev(priv);
 392
 393         io->mod[type] = mod;
 394
 395         dev_dbg(dev, "%s[%d] is connected to io (%s)\n",
 396                 rsnd_mod_name(mod), rsnd_mod_id(mod),
 397                 rsnd_io_is_play(io) ? "Playback" : "Capture");
 398
 399         return 0;
 400 }
 401
 402 static void rsnd_dai_disconnect(struct rsnd_mod *mod,
 403                                 struct rsnd_dai_stream *io,
 404                                 enum rsnd_mod_type type)
 405 {
 406         io->mod[type] = NULL;
 407 }
 408
 409 struct rsnd_dai *rsnd_rdai_get(struct rsnd_priv *priv, int id)
 410 {
 411         if ((id < 0) || (id >= rsnd_rdai_nr(priv)))
 412                 return NULL;
 413
 414         return priv->rdai + id;
 415 }
 416
 417 #define rsnd_dai_to_priv(dai) snd_soc_dai_get_drvdata(dai)
 418 static struct rsnd_dai *rsnd_dai_to_rdai(struct snd_soc_dai *dai)
 419 {
 420         struct rsnd_priv *priv = rsnd_dai_to_priv(dai);
 421
 422         return rsnd_rdai_get(priv, dai->id);
 423 }
 424
 425 /*
 426  *      rsnd_soc_dai functions
 427  */
 428 int rsnd_dai_pointer_offset(struct rsnd_dai_stream *io, int additional)
 429 {
 430         struct snd_pcm_substream *substream = io->substream;
 431         struct snd_pcm_runtime *runtime = substream->runtime;
 432         int pos = io->byte_pos + additional;
 433
 434         pos %= (runtime->periods * io->byte_per_period);
 435
 436         return pos;
 437 }
 438
 439 bool rsnd_dai_pointer_update(struct rsnd_dai_stream *io, int byte)
 440 {
 441         io->byte_pos += byte;
 442
 443         if (io->byte_pos >= io->next_period_byte) {
 444                 struct snd_pcm_substream *substream = io->substream;
 445                 struct snd_pcm_runtime *runtime = substream->runtime;
 446
 447                 io->period_pos++;
 448                 io->next_period_byte += io->byte_per_period;
 449
 450                 if (io->period_pos >= runtime->periods) {
 451                         io->byte_pos = 0;
 452                         io->period_pos = 0;
 453                         io->next_period_byte = io->byte_per_period;
 454                 }
 455
 456                 return true;
 457         }
 458
 459         return false;
 460 }
 461
 462 void rsnd_dai_period_elapsed(struct rsnd_dai_stream *io)
 463 {
 464         struct snd_pcm_substream *substream = io->substream;
 465
 466         /*
 467          * this function should be called...
 468          *
 469          * - if rsnd_dai_pointer_update() returns true
 470          * - without spin lock
 471          */
 472
 473         snd_pcm_period_elapsed(substream);
 474 }
 475
 476 static void rsnd_dai_stream_init(struct rsnd_dai_stream *io,
 477                                 struct snd_pcm_substream *substream)
 478 {
 479         struct snd_pcm_runtime *runtime = substream->runtime;
 480
 481         io->substream           = substream;
 482         io->byte_pos            = 0;
 483         io->period_pos          = 0;
 484         io->byte_per_period     = runtime->period_size *
 485                                   runtime->channels *
 486                                   samples_to_bytes(runtime, 1);
 487         io->next_period_byte    = io->byte_per_period;
 488 }
 489
 490 static void rsnd_dai_stream_quit(struct rsnd_dai_stream *io)
 491 {
 492         io->substream           = NULL;
 493 }
 494
 495 static
 496 struct snd_soc_dai *rsnd_substream_to_dai(struct snd_pcm_substream *substream)
 497 {
 498         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 499
 500         return  rtd->cpu_dai;
 501 }
 502
 503 static
 504 struct rsnd_dai_stream *rsnd_rdai_to_io(struct rsnd_dai *rdai,
 505                                         struct snd_pcm_substream *substream)
 506 {
 507         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 508                 return &rdai->playback;
 509         else
 510                 return &rdai->capture;
 511 }
 512
 513 static int rsnd_soc_dai_trigger(struct snd_pcm_substream *substream, int cmd,
 514                             struct snd_soc_dai *dai)
 515 {
 516         struct rsnd_priv *priv = rsnd_dai_to_priv(dai);
 517         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
 518         struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream);
 519         int ret;
 520         unsigned long flags;
 521
 522         spin_lock_irqsave(&priv->lock, flags);
 523
 524         switch (cmd) {
 525         case SNDRV_PCM_TRIGGER_START:
 526                 rsnd_dai_stream_init(io, substream);
 527
 528                 ret = rsnd_dai_call(init, io, priv);
 529                 if (ret < 0)
 530                         goto dai_trigger_end;
 531
 532                 ret = rsnd_dai_call(start, io, priv);
 533                 if (ret < 0)
 534                         goto dai_trigger_end;
 535                 break;
 536         case SNDRV_PCM_TRIGGER_STOP:
 537                 ret = rsnd_dai_call(stop, io, priv);
 538
 539                 ret |= rsnd_dai_call(quit, io, priv);
 540
 541                 rsnd_dai_stream_quit(io);
 542                 break;
 543         default:
 544                 ret = -EINVAL;
 545         }
 546
 547 dai_trigger_end:
 548         spin_unlock_irqrestore(&priv->lock, flags);
 549
 550         return ret;
 551 }
 552
 553 static int rsnd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
 554 {
 555         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
 556
 557         /* set master/slave audio interface */
 558         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 559         case SND_SOC_DAIFMT_CBM_CFM:
 560                 rdai->clk_master = 0;
 561                 break;
 562         case SND_SOC_DAIFMT_CBS_CFS:
 563                 rdai->clk_master = 1; /* codec is slave, cpu is master */
 564                 break;
 565         default:
 566                 return -EINVAL;
 567         }
 568
 569         /* set format */
 570         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 571         case SND_SOC_DAIFMT_I2S:
 572                 rdai->sys_delay = 0;
 573                 rdai->data_alignment = 0;
 574                 rdai->frm_clk_inv = 0;
 575                 break;
 576         case SND_SOC_DAIFMT_LEFT_J:
 577                 rdai->sys_delay = 1;
 578                 rdai->data_alignment = 0;
 579                 rdai->frm_clk_inv = 1;
 580                 break;
 581         case SND_SOC_DAIFMT_RIGHT_J:
 582                 rdai->sys_delay = 1;
 583                 rdai->data_alignment = 1;
 584                 rdai->frm_clk_inv = 1;
 585                 break;
 586         }
 587
 588         /* set clock inversion */
 589         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
 590         case SND_SOC_DAIFMT_NB_IF:
 591                 rdai->bit_clk_inv =  rdai->bit_clk_inv;
 592                 rdai->frm_clk_inv = !rdai->frm_clk_inv;
 593                 break;
 594         case SND_SOC_DAIFMT_IB_NF:
 595                 rdai->bit_clk_inv = !rdai->bit_clk_inv;
 596                 rdai->frm_clk_inv =  rdai->frm_clk_inv;
 597                 break;
 598         case SND_SOC_DAIFMT_IB_IF:
 599                 rdai->bit_clk_inv = !rdai->bit_clk_inv;
 600                 rdai->frm_clk_inv = !rdai->frm_clk_inv;
 601                 break;
 602         case SND_SOC_DAIFMT_NB_NF:
 603         default:
 604                 break;
 605         }
 606
 607         return 0;
 608 }
 609
 610 static int rsnd_soc_set_dai_tdm_slot(struct snd_soc_dai *dai,
 611                                      u32 tx_mask, u32 rx_mask,
 612                                      int slots, int slot_width)
 613 {
 614         struct rsnd_priv *priv = rsnd_dai_to_priv(dai);
 615         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
 616         struct device *dev = rsnd_priv_to_dev(priv);
 617
 618         switch (slots) {
 619         case 6:
 620                 /* TDM Extend Mode */
 621                 rsnd_set_slot(rdai, slots, 1);
 622                 break;
 623         default:
 624                 dev_err(dev, "unsupported TDM slots (%d)\n", slots);
 625                 return -EINVAL;
 626         }
 627
 628         return 0;
 629 }
 630
 631 static const struct snd_soc_dai_ops rsnd_soc_dai_ops = {
 632         .trigger        = rsnd_soc_dai_trigger,
 633         .set_fmt        = rsnd_soc_dai_set_fmt,
 634         .set_tdm_slot   = rsnd_soc_set_dai_tdm_slot,
 635 };
 636
 637 void rsnd_parse_connect_common(struct rsnd_dai *rdai,
 638                 struct rsnd_mod* (*mod_get)(struct rsnd_priv *priv, int id),
 639                 struct device_node *node,
 640                 struct device_node *playback,
 641                 struct device_node *capture)
 642 {
 643         struct rsnd_priv *priv = rsnd_rdai_to_priv(rdai);
 644         struct device_node *np;
 645         struct rsnd_mod *mod;
 646         int i;
 647
 648         if (!node)
 649                 return;
 650
 651         i = 0;
 652         for_each_child_of_node(node, np) {
 653                 mod = mod_get(priv, i);
 654                 if (np == playback)
 655                         rsnd_dai_connect(mod, &rdai->playback, mod->type);
 656                 if (np == capture)
 657                         rsnd_dai_connect(mod, &rdai->capture, mod->type);
 658                 i++;
 659         }
 660
 661         of_node_put(node);
 662 }
 663
 664 static int rsnd_dai_probe(struct rsnd_priv *priv)
 665 {
 666         struct device_node *dai_node;
 667         struct device_node *dai_np;
 668         struct device_node *playback, *capture;
 669         struct rsnd_dai_stream *io_playback;
 670         struct rsnd_dai_stream *io_capture;
 671         struct snd_soc_dai_driver *rdrv, *drv;
 672         struct rsnd_dai *rdai;
 673         struct device *dev = rsnd_priv_to_dev(priv);
 674         int nr, dai_i, io_i;
 675         int ret;
 676
 677         dai_node = rsnd_dai_of_node(priv);
 678         nr = of_get_child_count(dai_node);
 679         if (!nr) {
 680                 ret = -EINVAL;
 681                 goto rsnd_dai_probe_done;
 682         }
 683
 684         rdrv = devm_kzalloc(dev, sizeof(*rdrv) * nr, GFP_KERNEL);
 685         rdai = devm_kzalloc(dev, sizeof(*rdai) * nr, GFP_KERNEL);
 686         if (!rdrv || !rdai) {
 687                 ret = -ENOMEM;
 688                 goto rsnd_dai_probe_done;
 689         }
 690
 691         priv->rdai_nr   = nr;
 692         priv->daidrv    = rdrv;
 693         priv->rdai      = rdai;
 694
 695         /*
 696          * parse all dai
 697          */
 698         dai_i = 0;
 699         for_each_child_of_node(dai_node, dai_np) {
 700                 rdai            = rsnd_rdai_get(priv, dai_i);
 701                 drv             = rdrv + dai_i;
 702                 io_playback     = &rdai->playback;
 703                 io_capture      = &rdai->capture;
 704
 705                 snprintf(rdai->name, RSND_DAI_NAME_SIZE, "rsnd-dai.%d", dai_i);
 706
 707                 rdai->priv      = priv;
 708                 drv->name       = rdai->name;
 709                 drv->ops        = &rsnd_soc_dai_ops;
 710
 711                 snprintf(rdai->playback.name, RSND_DAI_NAME_SIZE,
 712                          "DAI%d Playback", dai_i);
 713                 drv->playback.rates             = RSND_RATES;
 714                 drv->playback.formats           = RSND_FMTS;
 715                 drv->playback.channels_min      = 2;
 716                 drv->playback.channels_max      = 6;
 717                 drv->playback.stream_name       = rdai->playback.name;
 718
 719                 snprintf(rdai->capture.name, RSND_DAI_NAME_SIZE,
 720                          "DAI%d Capture", dai_i);
 721                 drv->capture.rates              = RSND_RATES;
 722                 drv->capture.formats            = RSND_FMTS;
 723                 drv->capture.channels_min       = 2;
 724                 drv->capture.channels_max       = 6;
 725                 drv->capture.stream_name        = rdai->capture.name;
 726
 727                 rdai->playback.rdai             = rdai;
 728                 rdai->capture.rdai              = rdai;
 729                 rsnd_set_slot(rdai, 2, 1); /* default */
 730
 731                 for (io_i = 0;; io_i++) {
 732                         playback = of_parse_phandle(dai_np, "playback", io_i);
 733                         capture  = of_parse_phandle(dai_np, "capture", io_i);
 734
 735                         if (!playback && !capture)
 736                                 break;
 737
 738                         rsnd_parse_connect_ssi(rdai, playback, capture);
 739                         rsnd_parse_connect_src(rdai, playback, capture);
 740                         rsnd_parse_connect_ctu(rdai, playback, capture);
 741                         rsnd_parse_connect_mix(rdai, playback, capture);
 742                         rsnd_parse_connect_dvc(rdai, playback, capture);
 743
 744                         of_node_put(playback);
 745                         of_node_put(capture);
 746                 }
 747
 748                 dai_i++;
 749
 750                 dev_dbg(dev, "%s (%s/%s)\n", rdai->name,
 751                         rsnd_io_to_mod_ssi(io_playback) ? "play"    : " -- ",
 752                         rsnd_io_to_mod_ssi(io_capture) ? "capture" : "  --   ");
 753         }
 754
 755         ret = 0;
 756
 757 rsnd_dai_probe_done:
 758         of_node_put(dai_node);
 759
 760         return ret;
 761 }
 762
 763 /*
 764  *              pcm ops
 765  */
 766 static struct snd_pcm_hardware rsnd_pcm_hardware = {
 767         .info =         SNDRV_PCM_INFO_INTERLEAVED      |
 768                         SNDRV_PCM_INFO_MMAP             |
 769                         SNDRV_PCM_INFO_MMAP_VALID,
 770         .buffer_bytes_max       = 64 * 1024,
 771         .period_bytes_min       = 32,
 772         .period_bytes_max       = 8192,
 773         .periods_min            = 1,
 774         .periods_max            = 32,
 775         .fifo_size              = 256,
 776 };
 777
 778 static int rsnd_pcm_open(struct snd_pcm_substream *substream)
 779 {
 780         struct snd_pcm_runtime *runtime = substream->runtime;
 781         int ret = 0;
 782
 783         snd_soc_set_runtime_hwparams(substream, &rsnd_pcm_hardware);
 784
 785         ret = snd_pcm_hw_constraint_integer(runtime,
 786                                             SNDRV_PCM_HW_PARAM_PERIODS);
 787
 788         return ret;
 789 }
 790
 791 static int rsnd_hw_params(struct snd_pcm_substream *substream,
 792                          struct snd_pcm_hw_params *hw_params)
 793 {
 794         struct snd_soc_dai *dai = rsnd_substream_to_dai(substream);
 795         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
 796         struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream);
 797         int ret;
 798
 799         ret = rsnd_dai_call(hw_params, io, substream, hw_params);
 800         if (ret)
 801                 return ret;
 802
 803         return snd_pcm_lib_malloc_pages(substream,
 804                                         params_buffer_bytes(hw_params));
 805 }
 806
 807 static snd_pcm_uframes_t rsnd_pointer(struct snd_pcm_substream *substream)
 808 {
 809         struct snd_pcm_runtime *runtime = substream->runtime;
 810         struct snd_soc_dai *dai = rsnd_substream_to_dai(substream);
 811         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
 812         struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream);
 813
 814         return bytes_to_frames(runtime, io->byte_pos);
 815 }
 816
 817 static struct snd_pcm_ops rsnd_pcm_ops = {
 818         .open           = rsnd_pcm_open,
 819         .ioctl          = snd_pcm_lib_ioctl,
 820         .hw_params      = rsnd_hw_params,
 821         .hw_free        = snd_pcm_lib_free_pages,
 822         .pointer        = rsnd_pointer,
 823 };
 824
 825 /*
 826  *              snd_kcontrol
 827  */
 828 #define kcontrol_to_cfg(kctrl) ((struct rsnd_kctrl_cfg *)kctrl->private_value)
 829 static int rsnd_kctrl_info(struct snd_kcontrol *kctrl,
 830                            struct snd_ctl_elem_info *uinfo)
 831 {
 832         struct rsnd_kctrl_cfg *cfg = kcontrol_to_cfg(kctrl);
 833
 834         if (cfg->texts) {
 835                 uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
 836                 uinfo->count = cfg->size;
 837                 uinfo->value.enumerated.items = cfg->max;
 838                 if (uinfo->value.enumerated.item >= cfg->max)
 839                         uinfo->value.enumerated.item = cfg->max - 1;
 840                 strlcpy(uinfo->value.enumerated.name,
 841                         cfg->texts[uinfo->value.enumerated.item],
 842                         sizeof(uinfo->value.enumerated.name));
 843         } else {
 844                 uinfo->count = cfg->size;
 845                 uinfo->value.integer.min = 0;
 846                 uinfo->value.integer.max = cfg->max;
 847                 uinfo->type = (cfg->max == 1) ?
 848                         SNDRV_CTL_ELEM_TYPE_BOOLEAN :
 849                         SNDRV_CTL_ELEM_TYPE_INTEGER;
 850         }
 851
 852         return 0;
 853 }
 854
 855 static int rsnd_kctrl_get(struct snd_kcontrol *kctrl,
 856                           struct snd_ctl_elem_value *uc)
 857 {
 858         struct rsnd_kctrl_cfg *cfg = kcontrol_to_cfg(kctrl);
 859         int i;
 860
 861         for (i = 0; i < cfg->size; i++)
 862                 if (cfg->texts)
 863                         uc->value.enumerated.item[i] = cfg->val[i];
 864                 else
 865                         uc->value.integer.value[i] = cfg->val[i];
 866
 867         return 0;
 868 }
 869
 870 static int rsnd_kctrl_put(struct snd_kcontrol *kctrl,
 871                           struct snd_ctl_elem_value *uc)
 872 {
 873         struct rsnd_mod *mod = snd_kcontrol_chip(kctrl);
 874         struct rsnd_kctrl_cfg *cfg = kcontrol_to_cfg(kctrl);
 875         int i, change = 0;
 876
 877         for (i = 0; i < cfg->size; i++) {
 878                 if (cfg->texts) {
 879                         change |= (uc->value.enumerated.item[i] != cfg->val[i]);
 880                         cfg->val[i] = uc->value.enumerated.item[i];
 881                 } else {
 882                         change |= (uc->value.integer.value[i] != cfg->val[i]);
 883                         cfg->val[i] = uc->value.integer.value[i];
 884                 }
 885         }
 886
 887         if (change)
 888                 cfg->update(cfg->io, mod);
 889
 890         return change;
 891 }
 892
 893 static int __rsnd_kctrl_new(struct rsnd_mod *mod,
 894                             struct rsnd_dai_stream *io,
 895                             struct snd_soc_pcm_runtime *rtd,
 896                             const unsigned char *name,
 897                             struct rsnd_kctrl_cfg *cfg,
 898                             void (*update)(struct rsnd_dai_stream *io,
 899                                            struct rsnd_mod *mod))
 900 {
 901         struct snd_soc_card *soc_card = rtd->card;
 902         struct snd_card *card = rtd->card->snd_card;
 903         struct snd_kcontrol *kctrl;
 904         struct snd_kcontrol_new knew = {
 905                 .iface          = SNDRV_CTL_ELEM_IFACE_MIXER,
 906                 .name           = name,
 907                 .info           = rsnd_kctrl_info,
 908                 .index          = rtd - soc_card->rtd,
 909                 .get            = rsnd_kctrl_get,
 910                 .put            = rsnd_kctrl_put,
 911                 .private_value  = (unsigned long)cfg,
 912         };
 913         int ret;
 914
 915         kctrl = snd_ctl_new1(&knew, mod);
 916         if (!kctrl)
 917                 return -ENOMEM;
 918
 919         ret = snd_ctl_add(card, kctrl);
 920         if (ret < 0) {
 921                 snd_ctl_free_one(kctrl);
 922                 return ret;
 923         }
 924
 925         cfg->update = update;
 926         cfg->card = card;
 927         cfg->kctrl = kctrl;
 928         cfg->io = io;
 929
 930         return 0;
 931 }
 932
 933 void _rsnd_kctrl_remove(struct rsnd_kctrl_cfg *cfg)
 934 {
 935         snd_ctl_remove(cfg->card, cfg->kctrl);
 936 }
 937
 938 int rsnd_kctrl_new_m(struct rsnd_mod *mod,
 939                      struct rsnd_dai_stream *io,
 940                      struct snd_soc_pcm_runtime *rtd,
 941                      const unsigned char *name,
 942                      void (*update)(struct rsnd_dai_stream *io,
 943                                     struct rsnd_mod *mod),
 944                      struct rsnd_kctrl_cfg_m *_cfg,
 945                      int ch_size,
 946                      u32 max)
 947 {
 948         if (ch_size > RSND_DVC_CHANNELS)
 949                 return -EINVAL;
 950
 951         _cfg->cfg.max   = max;
 952         _cfg->cfg.size  = ch_size;
 953         _cfg->cfg.val   = _cfg->val;
 954         return __rsnd_kctrl_new(mod, io, rtd, name, &_cfg->cfg, update);
 955 }
 956
 957 int rsnd_kctrl_new_s(struct rsnd_mod *mod,
 958                      struct rsnd_dai_stream *io,
 959                      struct snd_soc_pcm_runtime *rtd,
 960                      const unsigned char *name,
 961                      void (*update)(struct rsnd_dai_stream *io,
 962                                     struct rsnd_mod *mod),
 963                      struct rsnd_kctrl_cfg_s *_cfg,
 964                      u32 max)
 965 {
 966         _cfg->cfg.max   = max;
 967         _cfg->cfg.size  = 1;
 968         _cfg->cfg.val   = &_cfg->val;
 969         return __rsnd_kctrl_new(mod, io, rtd, name, &_cfg->cfg, update);
 970 }
 971
 972 int rsnd_kctrl_new_e(struct rsnd_mod *mod,
 973                      struct rsnd_dai_stream *io,
 974                      struct snd_soc_pcm_runtime *rtd,
 975                      const unsigned char *name,
 976                      struct rsnd_kctrl_cfg_s *_cfg,
 977                      void (*update)(struct rsnd_dai_stream *io,
 978                                     struct rsnd_mod *mod),
 979                      const char * const *texts,
 980                      u32 max)
 981 {
 982         _cfg->cfg.max   = max;
 983         _cfg->cfg.size  = 1;
 984         _cfg->cfg.val   = &_cfg->val;
 985         _cfg->cfg.texts = texts;
 986         return __rsnd_kctrl_new(mod, io, rtd, name, &_cfg->cfg, update);
 987 }
 988
 989 /*
 990  *              snd_soc_platform
 991  */
 992
 993 #define PREALLOC_BUFFER         (32 * 1024)
 994 #define PREALLOC_BUFFER_MAX     (32 * 1024)
 995
 996 static int rsnd_pcm_new(struct snd_soc_pcm_runtime *rtd)
 997 {
 998         struct snd_soc_dai *dai = rtd->cpu_dai;
 999         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
1000         int ret;
1001
1002         ret = rsnd_dai_call(pcm_new, &rdai->playback, rtd);
1003         if (ret)
1004                 return ret;
1005
1006         ret = rsnd_dai_call(pcm_new, &rdai->capture, rtd);
1007         if (ret)
1008                 return ret;
1009
1010         return snd_pcm_lib_preallocate_pages_for_all(
1011                 rtd->pcm,
1012                 SNDRV_DMA_TYPE_DEV,
1013                 rtd->card->snd_card->dev,
1014                 PREALLOC_BUFFER, PREALLOC_BUFFER_MAX);
1015 }
1016
1017 static struct snd_soc_platform_driver rsnd_soc_platform = {
1018         .ops            = &rsnd_pcm_ops,
1019         .pcm_new        = rsnd_pcm_new,
1020 };
1021
1022 static const struct snd_soc_component_driver rsnd_soc_component = {
1023         .name           = "rsnd",
1024 };
1025
1026 static int rsnd_rdai_continuance_probe(struct rsnd_priv *priv,
1027                                        struct rsnd_dai_stream *io)
1028 {
1029         int ret;
1030
1031         ret = rsnd_dai_call(probe, io, priv);
1032         if (ret == -EAGAIN) {
1033                 struct rsnd_mod *ssi_mod = rsnd_io_to_mod_ssi(io);
1034                 int i;
1035
1036                 /*
1037                  * Fallback to PIO mode
1038                  */
1039
1040                 /*
1041                  * call "remove" for SSI/SRC/DVC
1042                  * SSI will be switch to PIO mode if it was DMA mode
1043                  * see
1044                  *      rsnd_dma_init()
1045                  *      rsnd_ssi_fallback()
1046                  */
1047                 rsnd_dai_call(remove, io, priv);
1048
1049                 /*
1050                  * remove all mod from io
1051                  * and, re connect ssi
1052                  */
1053                 for (i = 0; i < RSND_MOD_MAX; i++)
1054                         rsnd_dai_disconnect((io)->mod[i], io, i);
1055                 rsnd_dai_connect(ssi_mod, io, RSND_MOD_SSI);
1056
1057                 /*
1058                  * fallback
1059                  */
1060                 rsnd_dai_call(fallback, io, priv);
1061
1062                 /*
1063                  * retry to "probe".
1064                  * DAI has SSI which is PIO mode only now.
1065                  */
1066                 ret = rsnd_dai_call(probe, io, priv);
1067         }
1068
1069         return ret;
1070 }
1071
1072 /*
1073  *      rsnd probe
1074  */
1075 static int rsnd_probe(struct platform_device *pdev)
1076 {
1077         struct rsnd_priv *priv;
1078         struct device *dev = &pdev->dev;
1079         struct rsnd_dai *rdai;
1080         const struct of_device_id *of_id = of_match_device(rsnd_of_match, dev);
1081         int (*probe_func[])(struct rsnd_priv *priv) = {
1082                 rsnd_gen_probe,
1083                 rsnd_dma_probe,
1084                 rsnd_ssi_probe,
1085                 rsnd_ssiu_probe,
1086                 rsnd_src_probe,
1087                 rsnd_ctu_probe,
1088                 rsnd_mix_probe,
1089                 rsnd_dvc_probe,
1090                 rsnd_cmd_probe,
1091                 rsnd_adg_probe,
1092                 rsnd_dai_probe,
1093         };
1094         int ret, i;
1095
1096         /*
1097          *      init priv data
1098          */
1099         priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
1100         if (!priv) {
1101                 dev_err(dev, "priv allocate failed\n");
1102                 return -ENODEV;
1103         }
1104
1105         priv->pdev      = pdev;
1106         priv->flags     = (unsigned long)of_id->data;
1107         spin_lock_init(&priv->lock);
1108
1109         /*
1110          *      init each module
1111          */
1112         for (i = 0; i < ARRAY_SIZE(probe_func); i++) {
1113                 ret = probe_func[i](priv);
1114                 if (ret)
1115                         return ret;
1116         }
1117
1118         for_each_rsnd_dai(rdai, priv, i) {
1119                 ret = rsnd_rdai_continuance_probe(priv, &rdai->playback);
1120                 if (ret)
1121                         goto exit_snd_probe;
1122
1123                 ret = rsnd_rdai_continuance_probe(priv, &rdai->capture);
1124                 if (ret)
1125                         goto exit_snd_probe;
1126         }
1127
1128         dev_set_drvdata(dev, priv);
1129
1130         /*
1131          *      asoc register
1132          */
1133         ret = snd_soc_register_platform(dev, &rsnd_soc_platform);
1134         if (ret < 0) {
1135                 dev_err(dev, "cannot snd soc register\n");
1136                 return ret;
1137         }
1138
1139         ret = snd_soc_register_component(dev, &rsnd_soc_component,
1140                                          priv->daidrv, rsnd_rdai_nr(priv));
1141         if (ret < 0) {
1142                 dev_err(dev, "cannot snd dai register\n");
1143                 goto exit_snd_soc;
1144         }
1145
1146         pm_runtime_enable(dev);
1147
1148         dev_info(dev, "probed\n");
1149         return ret;
1150
1151 exit_snd_soc:
1152         snd_soc_unregister_platform(dev);
1153 exit_snd_probe:
1154         for_each_rsnd_dai(rdai, priv, i) {
1155                 rsnd_dai_call(remove, &rdai->playback, priv);
1156                 rsnd_dai_call(remove, &rdai->capture, priv);
1157         }
1158
1159         return ret;
1160 }
1161
1162 static int rsnd_remove(struct platform_device *pdev)
1163 {
1164         struct rsnd_priv *priv = dev_get_drvdata(&pdev->dev);
1165         struct rsnd_dai *rdai;
1166         void (*remove_func[])(struct rsnd_priv *priv) = {
1167                 rsnd_ssi_remove,
1168                 rsnd_ssiu_remove,
1169                 rsnd_src_remove,
1170                 rsnd_ctu_remove,
1171                 rsnd_mix_remove,
1172                 rsnd_dvc_remove,
1173                 rsnd_cmd_remove,
1174                 rsnd_adg_remove,
1175         };
1176         int ret = 0, i;
1177
1178         pm_runtime_disable(&pdev->dev);
1179
1180         for_each_rsnd_dai(rdai, priv, i) {
1181                 ret |= rsnd_dai_call(remove, &rdai->playback, priv);
1182                 ret |= rsnd_dai_call(remove, &rdai->capture, priv);
1183         }
1184
1185         for (i = 0; i < ARRAY_SIZE(remove_func); i++)
1186                 remove_func[i](priv);
1187
1188         snd_soc_unregister_component(&pdev->dev);
1189         snd_soc_unregister_platform(&pdev->dev);
1190
1191         return ret;
1192 }
1193
1194 static struct platform_driver rsnd_driver = {
1195         .driver = {
1196                 .name   = "rcar_sound",
1197                 .of_match_table = rsnd_of_match,
1198         },
1199         .probe          = rsnd_probe,
1200         .remove         = rsnd_remove,
1201 };
1202 module_platform_driver(rsnd_driver);
1203
1204 MODULE_LICENSE("GPL");
1205 MODULE_DESCRIPTION("Renesas R-Car audio driver");
1206 MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");
1207 MODULE_ALIAS("platform:rcar-pcm-audio");