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 static enum rsnd_mod_type rsnd_mod_sequence[][RSND_MOD_MAX] = {
 362         {
 363                 /* CAPTURE */
 364                 RSND_MOD_AUDMAPP,
 365                 RSND_MOD_AUDMA,
 366                 RSND_MOD_DVC,
 367                 RSND_MOD_MIX,
 368                 RSND_MOD_CTU,
 369                 RSND_MOD_CMD,
 370                 RSND_MOD_SRC,
 371                 RSND_MOD_SSIU,
 372                 RSND_MOD_SSIM3,
 373                 RSND_MOD_SSIM2,
 374                 RSND_MOD_SSIM1,
 375                 RSND_MOD_SSIP,
 376                 RSND_MOD_SSI,
 377         }, {
 378                 /* PLAYBACK */
 379                 RSND_MOD_AUDMAPP,
 380                 RSND_MOD_AUDMA,
 381                 RSND_MOD_SSIM3,
 382                 RSND_MOD_SSIM2,
 383                 RSND_MOD_SSIM1,
 384                 RSND_MOD_SSIP,
 385                 RSND_MOD_SSI,
 386                 RSND_MOD_SSIU,
 387                 RSND_MOD_DVC,
 388                 RSND_MOD_MIX,
 389                 RSND_MOD_CTU,
 390                 RSND_MOD_CMD,
 391                 RSND_MOD_SRC,
 392         },
 393 };
 394
 395 #define rsnd_dai_call(fn, io, param...)                         \
 396 ({                                                              \
 397         struct rsnd_mod *mod;                                   \
 398         int type, is_play = rsnd_io_is_play(io);                \
 399         int ret = 0, i;                                         \
 400         for (i = 0; i < RSND_MOD_MAX; i++) {                    \
 401                 type = rsnd_mod_sequence[is_play][i];           \
 402                 mod = (io)->mod[type];                          \
 403                 if (!mod)                                       \
 404                         continue;                               \
 405                 ret |= rsnd_mod_call(type, io, fn, param);      \
 406         }                                                       \
 407         ret;                                                    \
 408 })
 409
 410 int rsnd_dai_connect(struct rsnd_mod *mod,
 411                      struct rsnd_dai_stream *io,
 412                      enum rsnd_mod_type type)
 413 {
 414         struct rsnd_priv *priv;
 415         struct device *dev;
 416
 417         if (!mod)
 418                 return -EIO;
 419
 420         if (io->mod[type] == mod)
 421                 return 0;
 422
 423         if (io->mod[type])
 424                 return -EINVAL;
 425
 426         priv = rsnd_mod_to_priv(mod);
 427         dev = rsnd_priv_to_dev(priv);
 428
 429         io->mod[type] = mod;
 430
 431         dev_dbg(dev, "%s[%d] is connected to io (%s)\n",
 432                 rsnd_mod_name(mod), rsnd_mod_id(mod),
 433                 rsnd_io_is_play(io) ? "Playback" : "Capture");
 434
 435         return 0;
 436 }
 437
 438 static void rsnd_dai_disconnect(struct rsnd_mod *mod,
 439                                 struct rsnd_dai_stream *io,
 440                                 enum rsnd_mod_type type)
 441 {
 442         io->mod[type] = NULL;
 443 }
 444
 445 struct rsnd_dai *rsnd_rdai_get(struct rsnd_priv *priv, int id)
 446 {
 447         if ((id < 0) || (id >= rsnd_rdai_nr(priv)))
 448                 return NULL;
 449
 450         return priv->rdai + id;
 451 }
 452
 453 #define rsnd_dai_to_priv(dai) snd_soc_dai_get_drvdata(dai)
 454 static struct rsnd_dai *rsnd_dai_to_rdai(struct snd_soc_dai *dai)
 455 {
 456         struct rsnd_priv *priv = rsnd_dai_to_priv(dai);
 457
 458         return rsnd_rdai_get(priv, dai->id);
 459 }
 460
 461 /*
 462  *      rsnd_soc_dai functions
 463  */
 464 int rsnd_dai_pointer_offset(struct rsnd_dai_stream *io, int additional)
 465 {
 466         struct snd_pcm_substream *substream = io->substream;
 467         struct snd_pcm_runtime *runtime = substream->runtime;
 468         int pos = io->byte_pos + additional;
 469
 470         pos %= (runtime->periods * io->byte_per_period);
 471
 472         return pos;
 473 }
 474
 475 bool rsnd_dai_pointer_update(struct rsnd_dai_stream *io, int byte)
 476 {
 477         io->byte_pos += byte;
 478
 479         if (io->byte_pos >= io->next_period_byte) {
 480                 struct snd_pcm_substream *substream = io->substream;
 481                 struct snd_pcm_runtime *runtime = substream->runtime;
 482
 483                 io->period_pos++;
 484                 io->next_period_byte += io->byte_per_period;
 485
 486                 if (io->period_pos >= runtime->periods) {
 487                         io->byte_pos = 0;
 488                         io->period_pos = 0;
 489                         io->next_period_byte = io->byte_per_period;
 490                 }
 491
 492                 return true;
 493         }
 494
 495         return false;
 496 }
 497
 498 void rsnd_dai_period_elapsed(struct rsnd_dai_stream *io)
 499 {
 500         struct snd_pcm_substream *substream = io->substream;
 501
 502         /*
 503          * this function should be called...
 504          *
 505          * - if rsnd_dai_pointer_update() returns true
 506          * - without spin lock
 507          */
 508
 509         snd_pcm_period_elapsed(substream);
 510 }
 511
 512 static void rsnd_dai_stream_init(struct rsnd_dai_stream *io,
 513                                 struct snd_pcm_substream *substream)
 514 {
 515         struct snd_pcm_runtime *runtime = substream->runtime;
 516
 517         io->substream           = substream;
 518         io->byte_pos            = 0;
 519         io->period_pos          = 0;
 520         io->byte_per_period     = runtime->period_size *
 521                                   runtime->channels *
 522                                   samples_to_bytes(runtime, 1);
 523         io->next_period_byte    = io->byte_per_period;
 524 }
 525
 526 static void rsnd_dai_stream_quit(struct rsnd_dai_stream *io)
 527 {
 528         io->substream           = NULL;
 529 }
 530
 531 static
 532 struct snd_soc_dai *rsnd_substream_to_dai(struct snd_pcm_substream *substream)
 533 {
 534         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 535
 536         return  rtd->cpu_dai;
 537 }
 538
 539 static
 540 struct rsnd_dai_stream *rsnd_rdai_to_io(struct rsnd_dai *rdai,
 541                                         struct snd_pcm_substream *substream)
 542 {
 543         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 544                 return &rdai->playback;
 545         else
 546                 return &rdai->capture;
 547 }
 548
 549 static int rsnd_soc_dai_trigger(struct snd_pcm_substream *substream, int cmd,
 550                             struct snd_soc_dai *dai)
 551 {
 552         struct rsnd_priv *priv = rsnd_dai_to_priv(dai);
 553         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
 554         struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream);
 555         int ret;
 556         unsigned long flags;
 557
 558         spin_lock_irqsave(&priv->lock, flags);
 559
 560         switch (cmd) {
 561         case SNDRV_PCM_TRIGGER_START:
 562                 rsnd_dai_stream_init(io, substream);
 563
 564                 ret = rsnd_dai_call(init, io, priv);
 565                 if (ret < 0)
 566                         goto dai_trigger_end;
 567
 568                 ret = rsnd_dai_call(start, io, priv);
 569                 if (ret < 0)
 570                         goto dai_trigger_end;
 571
 572                 ret = rsnd_dai_call(irq, io, priv, 1);
 573                 if (ret < 0)
 574                         goto dai_trigger_end;
 575
 576                 break;
 577         case SNDRV_PCM_TRIGGER_STOP:
 578                 ret = rsnd_dai_call(irq, io, priv, 0);
 579
 580                 ret |= rsnd_dai_call(stop, io, priv);
 581
 582                 ret |= rsnd_dai_call(quit, io, priv);
 583
 584                 rsnd_dai_stream_quit(io);
 585                 break;
 586         default:
 587                 ret = -EINVAL;
 588         }
 589
 590 dai_trigger_end:
 591         spin_unlock_irqrestore(&priv->lock, flags);
 592
 593         return ret;
 594 }
 595
 596 static int rsnd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
 597 {
 598         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
 599
 600         /* set master/slave audio interface */
 601         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 602         case SND_SOC_DAIFMT_CBM_CFM:
 603                 rdai->clk_master = 0;
 604                 break;
 605         case SND_SOC_DAIFMT_CBS_CFS:
 606                 rdai->clk_master = 1; /* codec is slave, cpu is master */
 607                 break;
 608         default:
 609                 return -EINVAL;
 610         }
 611
 612         /* set format */
 613         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 614         case SND_SOC_DAIFMT_I2S:
 615                 rdai->sys_delay = 0;
 616                 rdai->data_alignment = 0;
 617                 rdai->frm_clk_inv = 0;
 618                 break;
 619         case SND_SOC_DAIFMT_LEFT_J:
 620                 rdai->sys_delay = 1;
 621                 rdai->data_alignment = 0;
 622                 rdai->frm_clk_inv = 1;
 623                 break;
 624         case SND_SOC_DAIFMT_RIGHT_J:
 625                 rdai->sys_delay = 1;
 626                 rdai->data_alignment = 1;
 627                 rdai->frm_clk_inv = 1;
 628                 break;
 629         }
 630
 631         /* set clock inversion */
 632         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
 633         case SND_SOC_DAIFMT_NB_IF:
 634                 rdai->bit_clk_inv =  rdai->bit_clk_inv;
 635                 rdai->frm_clk_inv = !rdai->frm_clk_inv;
 636                 break;
 637         case SND_SOC_DAIFMT_IB_NF:
 638                 rdai->bit_clk_inv = !rdai->bit_clk_inv;
 639                 rdai->frm_clk_inv =  rdai->frm_clk_inv;
 640                 break;
 641         case SND_SOC_DAIFMT_IB_IF:
 642                 rdai->bit_clk_inv = !rdai->bit_clk_inv;
 643                 rdai->frm_clk_inv = !rdai->frm_clk_inv;
 644                 break;
 645         case SND_SOC_DAIFMT_NB_NF:
 646         default:
 647                 break;
 648         }
 649
 650         return 0;
 651 }
 652
 653 static int rsnd_soc_set_dai_tdm_slot(struct snd_soc_dai *dai,
 654                                      u32 tx_mask, u32 rx_mask,
 655                                      int slots, int slot_width)
 656 {
 657         struct rsnd_priv *priv = rsnd_dai_to_priv(dai);
 658         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
 659         struct device *dev = rsnd_priv_to_dev(priv);
 660
 661         switch (slots) {
 662         case 6:
 663                 /* TDM Extend Mode */
 664                 rsnd_set_slot(rdai, slots, 1);
 665                 break;
 666         default:
 667                 dev_err(dev, "unsupported TDM slots (%d)\n", slots);
 668                 return -EINVAL;
 669         }
 670
 671         return 0;
 672 }
 673
 674 static const struct snd_soc_dai_ops rsnd_soc_dai_ops = {
 675         .trigger        = rsnd_soc_dai_trigger,
 676         .set_fmt        = rsnd_soc_dai_set_fmt,
 677         .set_tdm_slot   = rsnd_soc_set_dai_tdm_slot,
 678 };
 679
 680 void rsnd_parse_connect_common(struct rsnd_dai *rdai,
 681                 struct rsnd_mod* (*mod_get)(struct rsnd_priv *priv, int id),
 682                 struct device_node *node,
 683                 struct device_node *playback,
 684                 struct device_node *capture)
 685 {
 686         struct rsnd_priv *priv = rsnd_rdai_to_priv(rdai);
 687         struct device_node *np;
 688         struct rsnd_mod *mod;
 689         int i;
 690
 691         if (!node)
 692                 return;
 693
 694         i = 0;
 695         for_each_child_of_node(node, np) {
 696                 mod = mod_get(priv, i);
 697                 if (np == playback)
 698                         rsnd_dai_connect(mod, &rdai->playback, mod->type);
 699                 if (np == capture)
 700                         rsnd_dai_connect(mod, &rdai->capture, mod->type);
 701                 i++;
 702         }
 703
 704         of_node_put(node);
 705 }
 706
 707 static int rsnd_dai_probe(struct rsnd_priv *priv)
 708 {
 709         struct device_node *dai_node;
 710         struct device_node *dai_np;
 711         struct device_node *playback, *capture;
 712         struct rsnd_dai_stream *io_playback;
 713         struct rsnd_dai_stream *io_capture;
 714         struct snd_soc_dai_driver *rdrv, *drv;
 715         struct rsnd_dai *rdai;
 716         struct device *dev = rsnd_priv_to_dev(priv);
 717         int nr, dai_i, io_i;
 718         int ret;
 719
 720         dai_node = rsnd_dai_of_node(priv);
 721         nr = of_get_child_count(dai_node);
 722         if (!nr) {
 723                 ret = -EINVAL;
 724                 goto rsnd_dai_probe_done;
 725         }
 726
 727         rdrv = devm_kzalloc(dev, sizeof(*rdrv) * nr, GFP_KERNEL);
 728         rdai = devm_kzalloc(dev, sizeof(*rdai) * nr, GFP_KERNEL);
 729         if (!rdrv || !rdai) {
 730                 ret = -ENOMEM;
 731                 goto rsnd_dai_probe_done;
 732         }
 733
 734         priv->rdai_nr   = nr;
 735         priv->daidrv    = rdrv;
 736         priv->rdai      = rdai;
 737
 738         /*
 739          * parse all dai
 740          */
 741         dai_i = 0;
 742         for_each_child_of_node(dai_node, dai_np) {
 743                 rdai            = rsnd_rdai_get(priv, dai_i);
 744                 drv             = rdrv + dai_i;
 745                 io_playback     = &rdai->playback;
 746                 io_capture      = &rdai->capture;
 747
 748                 snprintf(rdai->name, RSND_DAI_NAME_SIZE, "rsnd-dai.%d", dai_i);
 749
 750                 rdai->priv      = priv;
 751                 drv->name       = rdai->name;
 752                 drv->ops        = &rsnd_soc_dai_ops;
 753
 754                 snprintf(rdai->playback.name, RSND_DAI_NAME_SIZE,
 755                          "DAI%d Playback", dai_i);
 756                 drv->playback.rates             = RSND_RATES;
 757                 drv->playback.formats           = RSND_FMTS;
 758                 drv->playback.channels_min      = 2;
 759                 drv->playback.channels_max      = 6;
 760                 drv->playback.stream_name       = rdai->playback.name;
 761
 762                 snprintf(rdai->capture.name, RSND_DAI_NAME_SIZE,
 763                          "DAI%d Capture", dai_i);
 764                 drv->capture.rates              = RSND_RATES;
 765                 drv->capture.formats            = RSND_FMTS;
 766                 drv->capture.channels_min       = 2;
 767                 drv->capture.channels_max       = 6;
 768                 drv->capture.stream_name        = rdai->capture.name;
 769
 770                 rdai->playback.rdai             = rdai;
 771                 rdai->capture.rdai              = rdai;
 772                 rsnd_set_slot(rdai, 2, 1); /* default */
 773
 774                 for (io_i = 0;; io_i++) {
 775                         playback = of_parse_phandle(dai_np, "playback", io_i);
 776                         capture  = of_parse_phandle(dai_np, "capture", io_i);
 777
 778                         if (!playback && !capture)
 779                                 break;
 780
 781                         rsnd_parse_connect_ssi(rdai, playback, capture);
 782                         rsnd_parse_connect_src(rdai, playback, capture);
 783                         rsnd_parse_connect_ctu(rdai, playback, capture);
 784                         rsnd_parse_connect_mix(rdai, playback, capture);
 785                         rsnd_parse_connect_dvc(rdai, playback, capture);
 786
 787                         of_node_put(playback);
 788                         of_node_put(capture);
 789                 }
 790
 791                 dai_i++;
 792
 793                 dev_dbg(dev, "%s (%s/%s)\n", rdai->name,
 794                         rsnd_io_to_mod_ssi(io_playback) ? "play"    : " -- ",
 795                         rsnd_io_to_mod_ssi(io_capture) ? "capture" : "  --   ");
 796         }
 797
 798         ret = 0;
 799
 800 rsnd_dai_probe_done:
 801         of_node_put(dai_node);
 802
 803         return ret;
 804 }
 805
 806 /*
 807  *              pcm ops
 808  */
 809 static struct snd_pcm_hardware rsnd_pcm_hardware = {
 810         .info =         SNDRV_PCM_INFO_INTERLEAVED      |
 811                         SNDRV_PCM_INFO_MMAP             |
 812                         SNDRV_PCM_INFO_MMAP_VALID,
 813         .buffer_bytes_max       = 64 * 1024,
 814         .period_bytes_min       = 32,
 815         .period_bytes_max       = 8192,
 816         .periods_min            = 1,
 817         .periods_max            = 32,
 818         .fifo_size              = 256,
 819 };
 820
 821 static int rsnd_pcm_open(struct snd_pcm_substream *substream)
 822 {
 823         struct snd_pcm_runtime *runtime = substream->runtime;
 824         int ret = 0;
 825
 826         snd_soc_set_runtime_hwparams(substream, &rsnd_pcm_hardware);
 827
 828         ret = snd_pcm_hw_constraint_integer(runtime,
 829                                             SNDRV_PCM_HW_PARAM_PERIODS);
 830
 831         return ret;
 832 }
 833
 834 static int rsnd_hw_params(struct snd_pcm_substream *substream,
 835                          struct snd_pcm_hw_params *hw_params)
 836 {
 837         struct snd_soc_dai *dai = rsnd_substream_to_dai(substream);
 838         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
 839         struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream);
 840         int ret;
 841
 842         ret = rsnd_dai_call(hw_params, io, substream, hw_params);
 843         if (ret)
 844                 return ret;
 845
 846         return snd_pcm_lib_malloc_pages(substream,
 847                                         params_buffer_bytes(hw_params));
 848 }
 849
 850 static snd_pcm_uframes_t rsnd_pointer(struct snd_pcm_substream *substream)
 851 {
 852         struct snd_pcm_runtime *runtime = substream->runtime;
 853         struct snd_soc_dai *dai = rsnd_substream_to_dai(substream);
 854         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
 855         struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream);
 856
 857         return bytes_to_frames(runtime, io->byte_pos);
 858 }
 859
 860 static struct snd_pcm_ops rsnd_pcm_ops = {
 861         .open           = rsnd_pcm_open,
 862         .ioctl          = snd_pcm_lib_ioctl,
 863         .hw_params      = rsnd_hw_params,
 864         .hw_free        = snd_pcm_lib_free_pages,
 865         .pointer        = rsnd_pointer,
 866 };
 867
 868 /*
 869  *              snd_kcontrol
 870  */
 871 #define kcontrol_to_cfg(kctrl) ((struct rsnd_kctrl_cfg *)kctrl->private_value)
 872 static int rsnd_kctrl_info(struct snd_kcontrol *kctrl,
 873                            struct snd_ctl_elem_info *uinfo)
 874 {
 875         struct rsnd_kctrl_cfg *cfg = kcontrol_to_cfg(kctrl);
 876
 877         if (cfg->texts) {
 878                 uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
 879                 uinfo->count = cfg->size;
 880                 uinfo->value.enumerated.items = cfg->max;
 881                 if (uinfo->value.enumerated.item >= cfg->max)
 882                         uinfo->value.enumerated.item = cfg->max - 1;
 883                 strlcpy(uinfo->value.enumerated.name,
 884                         cfg->texts[uinfo->value.enumerated.item],
 885                         sizeof(uinfo->value.enumerated.name));
 886         } else {
 887                 uinfo->count = cfg->size;
 888                 uinfo->value.integer.min = 0;
 889                 uinfo->value.integer.max = cfg->max;
 890                 uinfo->type = (cfg->max == 1) ?
 891                         SNDRV_CTL_ELEM_TYPE_BOOLEAN :
 892                         SNDRV_CTL_ELEM_TYPE_INTEGER;
 893         }
 894
 895         return 0;
 896 }
 897
 898 static int rsnd_kctrl_get(struct snd_kcontrol *kctrl,
 899                           struct snd_ctl_elem_value *uc)
 900 {
 901         struct rsnd_kctrl_cfg *cfg = kcontrol_to_cfg(kctrl);
 902         int i;
 903
 904         for (i = 0; i < cfg->size; i++)
 905                 if (cfg->texts)
 906                         uc->value.enumerated.item[i] = cfg->val[i];
 907                 else
 908                         uc->value.integer.value[i] = cfg->val[i];
 909
 910         return 0;
 911 }
 912
 913 static int rsnd_kctrl_put(struct snd_kcontrol *kctrl,
 914                           struct snd_ctl_elem_value *uc)
 915 {
 916         struct rsnd_mod *mod = snd_kcontrol_chip(kctrl);
 917         struct rsnd_kctrl_cfg *cfg = kcontrol_to_cfg(kctrl);
 918         int i, change = 0;
 919
 920         for (i = 0; i < cfg->size; i++) {
 921                 if (cfg->texts) {
 922                         change |= (uc->value.enumerated.item[i] != cfg->val[i]);
 923                         cfg->val[i] = uc->value.enumerated.item[i];
 924                 } else {
 925                         change |= (uc->value.integer.value[i] != cfg->val[i]);
 926                         cfg->val[i] = uc->value.integer.value[i];
 927                 }
 928         }
 929
 930         if (change)
 931                 cfg->update(cfg->io, mod);
 932
 933         return change;
 934 }
 935
 936 static int __rsnd_kctrl_new(struct rsnd_mod *mod,
 937                             struct rsnd_dai_stream *io,
 938                             struct snd_soc_pcm_runtime *rtd,
 939                             const unsigned char *name,
 940                             struct rsnd_kctrl_cfg *cfg,
 941                             void (*update)(struct rsnd_dai_stream *io,
 942                                            struct rsnd_mod *mod))
 943 {
 944         struct snd_card *card = rtd->card->snd_card;
 945         struct snd_kcontrol *kctrl;
 946         struct snd_kcontrol_new knew = {
 947                 .iface          = SNDRV_CTL_ELEM_IFACE_MIXER,
 948                 .name           = name,
 949                 .info           = rsnd_kctrl_info,
 950                 .index          = rtd->num,
 951                 .get            = rsnd_kctrl_get,
 952                 .put            = rsnd_kctrl_put,
 953                 .private_value  = (unsigned long)cfg,
 954         };
 955         int ret;
 956
 957         kctrl = snd_ctl_new1(&knew, mod);
 958         if (!kctrl)
 959                 return -ENOMEM;
 960
 961         ret = snd_ctl_add(card, kctrl);
 962         if (ret < 0) {
 963                 snd_ctl_free_one(kctrl);
 964                 return ret;
 965         }
 966
 967         cfg->update = update;
 968         cfg->card = card;
 969         cfg->kctrl = kctrl;
 970         cfg->io = io;
 971
 972         return 0;
 973 }
 974
 975 void _rsnd_kctrl_remove(struct rsnd_kctrl_cfg *cfg)
 976 {
 977         snd_ctl_remove(cfg->card, cfg->kctrl);
 978 }
 979
 980 int rsnd_kctrl_new_m(struct rsnd_mod *mod,
 981                      struct rsnd_dai_stream *io,
 982                      struct snd_soc_pcm_runtime *rtd,
 983                      const unsigned char *name,
 984                      void (*update)(struct rsnd_dai_stream *io,
 985                                     struct rsnd_mod *mod),
 986                      struct rsnd_kctrl_cfg_m *_cfg,
 987                      int ch_size,
 988                      u32 max)
 989 {
 990         if (ch_size > RSND_DVC_CHANNELS)
 991                 return -EINVAL;
 992
 993         _cfg->cfg.max   = max;
 994         _cfg->cfg.size  = ch_size;
 995         _cfg->cfg.val   = _cfg->val;
 996         return __rsnd_kctrl_new(mod, io, rtd, name, &_cfg->cfg, update);
 997 }
 998
 999 int rsnd_kctrl_new_s(struct rsnd_mod *mod,
1000                      struct rsnd_dai_stream *io,
1001                      struct snd_soc_pcm_runtime *rtd,
1002                      const unsigned char *name,
1003                      void (*update)(struct rsnd_dai_stream *io,
1004                                     struct rsnd_mod *mod),
1005                      struct rsnd_kctrl_cfg_s *_cfg,
1006                      u32 max)
1007 {
1008         _cfg->cfg.max   = max;
1009         _cfg->cfg.size  = 1;
1010         _cfg->cfg.val   = &_cfg->val;
1011         return __rsnd_kctrl_new(mod, io, rtd, name, &_cfg->cfg, update);
1012 }
1013
1014 int rsnd_kctrl_new_e(struct rsnd_mod *mod,
1015                      struct rsnd_dai_stream *io,
1016                      struct snd_soc_pcm_runtime *rtd,
1017                      const unsigned char *name,
1018                      struct rsnd_kctrl_cfg_s *_cfg,
1019                      void (*update)(struct rsnd_dai_stream *io,
1020                                     struct rsnd_mod *mod),
1021                      const char * const *texts,
1022                      u32 max)
1023 {
1024         _cfg->cfg.max   = max;
1025         _cfg->cfg.size  = 1;
1026         _cfg->cfg.val   = &_cfg->val;
1027         _cfg->cfg.texts = texts;
1028         return __rsnd_kctrl_new(mod, io, rtd, name, &_cfg->cfg, update);
1029 }
1030
1031 /*
1032  *              snd_soc_platform
1033  */
1034
1035 #define PREALLOC_BUFFER         (32 * 1024)
1036 #define PREALLOC_BUFFER_MAX     (32 * 1024)
1037
1038 static int rsnd_pcm_new(struct snd_soc_pcm_runtime *rtd)
1039 {
1040         struct snd_soc_dai *dai = rtd->cpu_dai;
1041         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
1042         int ret;
1043
1044         ret = rsnd_dai_call(pcm_new, &rdai->playback, rtd);
1045         if (ret)
1046                 return ret;
1047
1048         ret = rsnd_dai_call(pcm_new, &rdai->capture, rtd);
1049         if (ret)
1050                 return ret;
1051
1052         return snd_pcm_lib_preallocate_pages_for_all(
1053                 rtd->pcm,
1054                 SNDRV_DMA_TYPE_DEV,
1055                 rtd->card->snd_card->dev,
1056                 PREALLOC_BUFFER, PREALLOC_BUFFER_MAX);
1057 }
1058
1059 static struct snd_soc_platform_driver rsnd_soc_platform = {
1060         .ops            = &rsnd_pcm_ops,
1061         .pcm_new        = rsnd_pcm_new,
1062 };
1063
1064 static const struct snd_soc_component_driver rsnd_soc_component = {
1065         .name           = "rsnd",
1066 };
1067
1068 static int rsnd_rdai_continuance_probe(struct rsnd_priv *priv,
1069                                        struct rsnd_dai_stream *io)
1070 {
1071         int ret;
1072
1073         ret = rsnd_dai_call(probe, io, priv);
1074         if (ret == -EAGAIN) {
1075                 struct rsnd_mod *ssi_mod = rsnd_io_to_mod_ssi(io);
1076                 int i;
1077
1078                 /*
1079                  * Fallback to PIO mode
1080                  */
1081
1082                 /*
1083                  * call "remove" for SSI/SRC/DVC
1084                  * SSI will be switch to PIO mode if it was DMA mode
1085                  * see
1086                  *      rsnd_dma_init()
1087                  *      rsnd_ssi_fallback()
1088                  */
1089                 rsnd_dai_call(remove, io, priv);
1090
1091                 /*
1092                  * remove all mod from io
1093                  * and, re connect ssi
1094                  */
1095                 for (i = 0; i < RSND_MOD_MAX; i++)
1096                         rsnd_dai_disconnect((io)->mod[i], io, i);
1097                 rsnd_dai_connect(ssi_mod, io, RSND_MOD_SSI);
1098
1099                 /*
1100                  * fallback
1101                  */
1102                 rsnd_dai_call(fallback, io, priv);
1103
1104                 /*
1105                  * retry to "probe".
1106                  * DAI has SSI which is PIO mode only now.
1107                  */
1108                 ret = rsnd_dai_call(probe, io, priv);
1109         }
1110
1111         return ret;
1112 }
1113
1114 /*
1115  *      rsnd probe
1116  */
1117 static int rsnd_probe(struct platform_device *pdev)
1118 {
1119         struct rsnd_priv *priv;
1120         struct device *dev = &pdev->dev;
1121         struct rsnd_dai *rdai;
1122         const struct of_device_id *of_id = of_match_device(rsnd_of_match, dev);
1123         int (*probe_func[])(struct rsnd_priv *priv) = {
1124                 rsnd_gen_probe,
1125                 rsnd_dma_probe,
1126                 rsnd_ssi_probe,
1127                 rsnd_ssiu_probe,
1128                 rsnd_src_probe,
1129                 rsnd_ctu_probe,
1130                 rsnd_mix_probe,
1131                 rsnd_dvc_probe,
1132                 rsnd_cmd_probe,
1133                 rsnd_adg_probe,
1134                 rsnd_dai_probe,
1135         };
1136         int ret, i;
1137
1138         /*
1139          *      init priv data
1140          */
1141         priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
1142         if (!priv) {
1143                 dev_err(dev, "priv allocate failed\n");
1144                 return -ENODEV;
1145         }
1146
1147         priv->pdev      = pdev;
1148         priv->flags     = (unsigned long)of_id->data;
1149         spin_lock_init(&priv->lock);
1150
1151         /*
1152          *      init each module
1153          */
1154         for (i = 0; i < ARRAY_SIZE(probe_func); i++) {
1155                 ret = probe_func[i](priv);
1156                 if (ret)
1157                         return ret;
1158         }
1159
1160         for_each_rsnd_dai(rdai, priv, i) {
1161                 ret = rsnd_rdai_continuance_probe(priv, &rdai->playback);
1162                 if (ret)
1163                         goto exit_snd_probe;
1164
1165                 ret = rsnd_rdai_continuance_probe(priv, &rdai->capture);
1166                 if (ret)
1167                         goto exit_snd_probe;
1168         }
1169
1170         dev_set_drvdata(dev, priv);
1171
1172         /*
1173          *      asoc register
1174          */
1175         ret = snd_soc_register_platform(dev, &rsnd_soc_platform);
1176         if (ret < 0) {
1177                 dev_err(dev, "cannot snd soc register\n");
1178                 return ret;
1179         }
1180
1181         ret = snd_soc_register_component(dev, &rsnd_soc_component,
1182                                          priv->daidrv, rsnd_rdai_nr(priv));
1183         if (ret < 0) {
1184                 dev_err(dev, "cannot snd dai register\n");
1185                 goto exit_snd_soc;
1186         }
1187
1188         pm_runtime_enable(dev);
1189
1190         dev_info(dev, "probed\n");
1191         return ret;
1192
1193 exit_snd_soc:
1194         snd_soc_unregister_platform(dev);
1195 exit_snd_probe:
1196         for_each_rsnd_dai(rdai, priv, i) {
1197                 rsnd_dai_call(remove, &rdai->playback, priv);
1198                 rsnd_dai_call(remove, &rdai->capture, priv);
1199         }
1200
1201         return ret;
1202 }
1203
1204 static int rsnd_remove(struct platform_device *pdev)
1205 {
1206         struct rsnd_priv *priv = dev_get_drvdata(&pdev->dev);
1207         struct rsnd_dai *rdai;
1208         void (*remove_func[])(struct rsnd_priv *priv) = {
1209                 rsnd_ssi_remove,
1210                 rsnd_ssiu_remove,
1211                 rsnd_src_remove,
1212                 rsnd_ctu_remove,
1213                 rsnd_mix_remove,
1214                 rsnd_dvc_remove,
1215                 rsnd_cmd_remove,
1216                 rsnd_adg_remove,
1217         };
1218         int ret = 0, i;
1219
1220         pm_runtime_disable(&pdev->dev);
1221
1222         for_each_rsnd_dai(rdai, priv, i) {
1223                 ret |= rsnd_dai_call(remove, &rdai->playback, priv);
1224                 ret |= rsnd_dai_call(remove, &rdai->capture, priv);
1225         }
1226
1227         for (i = 0; i < ARRAY_SIZE(remove_func); i++)
1228                 remove_func[i](priv);
1229
1230         snd_soc_unregister_component(&pdev->dev);
1231         snd_soc_unregister_platform(&pdev->dev);
1232
1233         return ret;
1234 }
1235
1236 static struct platform_driver rsnd_driver = {
1237         .driver = {
1238                 .name   = "rcar_sound",
1239                 .of_match_table = rsnd_of_match,
1240         },
1241         .probe          = rsnd_probe,
1242         .remove         = rsnd_remove,
1243 };
1244 module_platform_driver(rsnd_driver);
1245
1246 MODULE_LICENSE("GPL");
1247 MODULE_DESCRIPTION("Renesas R-Car audio driver");
1248 MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");
1249 MODULE_ALIAS("platform:rcar-pcm-audio");