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_runtime_channel_original(struct rsnd_dai_stream *io)
 228 {
 229         struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
 230
 231         return runtime->channels;
 232 }
 233
 234 int rsnd_runtime_channel_after_ctu(struct rsnd_dai_stream *io)
 235 {
 236         int chan = rsnd_runtime_channel_original(io);
 237         struct rsnd_mod *ctu_mod = rsnd_io_to_mod_ctu(io);
 238
 239         if (ctu_mod) {
 240                 u32 converted_chan = rsnd_ctu_converted_channel(ctu_mod);
 241
 242                 if (converted_chan)
 243                         return converted_chan;
 244         }
 245
 246         return chan;
 247 }
 248
 249 int rsnd_runtime_channel_for_ssi(struct rsnd_dai_stream *io)
 250 {
 251         int chan = rsnd_io_is_play(io) ?
 252                 rsnd_runtime_channel_after_ctu(io) :
 253                 rsnd_runtime_channel_original(io);
 254
 255         /* Use Multi SSI */
 256         if (rsnd_runtime_is_ssi_multi(io))
 257                 chan /= rsnd_get_slot_num(io);
 258
 259         /* TDM Extend Mode needs 8ch */
 260         if (chan == 6)
 261                 chan = 8;
 262
 263         return chan;
 264 }
 265
 266 int rsnd_runtime_is_ssi_multi(struct rsnd_dai_stream *io)
 267 {
 268         int slots = rsnd_get_slot_num(io);
 269         int chan = rsnd_io_is_play(io) ?
 270                 rsnd_runtime_channel_after_ctu(io) :
 271                 rsnd_runtime_channel_original(io);
 272
 273         return (chan >= 6) && (slots > 1);
 274 }
 275
 276 int rsnd_runtime_is_ssi_tdm(struct rsnd_dai_stream *io)
 277 {
 278         return rsnd_runtime_channel_for_ssi(io) >= 6;
 279 }
 280
 281 /*
 282  *      ADINR function
 283  */
 284 u32 rsnd_get_adinr_bit(struct rsnd_mod *mod, struct rsnd_dai_stream *io)
 285 {
 286         struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
 287         struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
 288         struct device *dev = rsnd_priv_to_dev(priv);
 289
 290         switch (runtime->sample_bits) {
 291         case 16:
 292                 return 8 << 16;
 293         case 32:
 294                 return 0 << 16;
 295         }
 296
 297         dev_warn(dev, "not supported sample bits\n");
 298
 299         return 0;
 300 }
 301
 302 /*
 303  *      DALIGN function
 304  */
 305 u32 rsnd_get_dalign(struct rsnd_mod *mod, struct rsnd_dai_stream *io)
 306 {
 307         struct rsnd_mod *ssi = rsnd_io_to_mod_ssi(io);
 308         struct rsnd_mod *target;
 309         struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
 310         u32 val = 0x76543210;
 311         u32 mask = ~0;
 312
 313         if (rsnd_io_is_play(io)) {
 314                 struct rsnd_mod *src = rsnd_io_to_mod_src(io);
 315
 316                 target = src ? src : ssi;
 317         } else {
 318                 struct rsnd_mod *cmd = rsnd_io_to_mod_cmd(io);
 319
 320                 target = cmd ? cmd : ssi;
 321         }
 322
 323         mask <<= runtime->channels * 4;
 324         val = val & mask;
 325
 326         switch (runtime->sample_bits) {
 327         case 16:
 328                 val |= 0x67452301 & ~mask;
 329                 break;
 330         case 32:
 331                 val |= 0x76543210 & ~mask;
 332                 break;
 333         }
 334
 335         /*
 336          * exchange channeles on SRC if possible,
 337          * otherwise, R/L volume settings on DVC
 338          * changes inverted channels
 339          */
 340         if (mod == target)
 341                 return val;
 342         else
 343                 return 0x76543210;
 344 }
 345
 346 /*
 347  *      rsnd_dai functions
 348  */
 349 #define rsnd_mod_call(idx, io, func, param...)                  \
 350 ({                                                              \
 351         struct rsnd_priv *priv = rsnd_mod_to_priv(mod);         \
 352         struct rsnd_mod *mod = (io)->mod[idx];                  \
 353         struct device *dev = rsnd_priv_to_dev(priv);            \
 354         u32 *status = mod->get_status(io, mod, idx);                    \
 355         u32 mask = 0xF << __rsnd_mod_shift_##func;                      \
 356         u8 val  = (*status >> __rsnd_mod_shift_##func) & 0xF;           \
 357         u8 add  = ((val + __rsnd_mod_add_##func) & 0xF);                \
 358         int ret = 0;                                                    \
 359         int call = (val == __rsnd_mod_call_##func) && (mod)->ops->func; \
 360         if (add == 0xF)                                                 \
 361                 call = 0;                                               \
 362         else                                                            \
 363                 *status = (*status & ~mask) +                           \
 364                         (add << __rsnd_mod_shift_##func);               \
 365         dev_dbg(dev, "%s[%d]\t0x%08x %s\n",                             \
 366                 rsnd_mod_name(mod), rsnd_mod_id(mod),                   \
 367                 *status, call ? #func : "");                            \
 368         if (call)                                                       \
 369                 ret = (mod)->ops->func(mod, io, param);                 \
 370         if (ret)                                                        \
 371                 dev_dbg(dev, "%s[%d] : rsnd_mod_call error %d\n",       \
 372                         rsnd_mod_name(mod), rsnd_mod_id(mod), ret);     \
 373         ret;                                                            \
 374 })
 375
 376 static enum rsnd_mod_type rsnd_mod_sequence[][RSND_MOD_MAX] = {
 377         {
 378                 /* CAPTURE */
 379                 RSND_MOD_AUDMAPP,
 380                 RSND_MOD_AUDMA,
 381                 RSND_MOD_DVC,
 382                 RSND_MOD_MIX,
 383                 RSND_MOD_CTU,
 384                 RSND_MOD_CMD,
 385                 RSND_MOD_SRC,
 386                 RSND_MOD_SSIU,
 387                 RSND_MOD_SSIM3,
 388                 RSND_MOD_SSIM2,
 389                 RSND_MOD_SSIM1,
 390                 RSND_MOD_SSIP,
 391                 RSND_MOD_SSI,
 392         }, {
 393                 /* PLAYBACK */
 394                 RSND_MOD_AUDMAPP,
 395                 RSND_MOD_AUDMA,
 396                 RSND_MOD_SSIM3,
 397                 RSND_MOD_SSIM2,
 398                 RSND_MOD_SSIM1,
 399                 RSND_MOD_SSIP,
 400                 RSND_MOD_SSI,
 401                 RSND_MOD_SSIU,
 402                 RSND_MOD_DVC,
 403                 RSND_MOD_MIX,
 404                 RSND_MOD_CTU,
 405                 RSND_MOD_CMD,
 406                 RSND_MOD_SRC,
 407         },
 408 };
 409
 410 #define rsnd_dai_call(fn, io, param...)                         \
 411 ({                                                              \
 412         struct rsnd_mod *mod;                                   \
 413         int type, is_play = rsnd_io_is_play(io);                \
 414         int ret = 0, i;                                         \
 415         for (i = 0; i < RSND_MOD_MAX; i++) {                    \
 416                 type = rsnd_mod_sequence[is_play][i];           \
 417                 mod = (io)->mod[type];                          \
 418                 if (!mod)                                       \
 419                         continue;                               \
 420                 ret |= rsnd_mod_call(type, io, fn, param);      \
 421         }                                                       \
 422         ret;                                                    \
 423 })
 424
 425 int rsnd_dai_connect(struct rsnd_mod *mod,
 426                      struct rsnd_dai_stream *io,
 427                      enum rsnd_mod_type type)
 428 {
 429         struct rsnd_priv *priv;
 430         struct device *dev;
 431
 432         if (!mod)
 433                 return -EIO;
 434
 435         if (io->mod[type] == mod)
 436                 return 0;
 437
 438         if (io->mod[type])
 439                 return -EINVAL;
 440
 441         priv = rsnd_mod_to_priv(mod);
 442         dev = rsnd_priv_to_dev(priv);
 443
 444         io->mod[type] = mod;
 445
 446         dev_dbg(dev, "%s[%d] is connected to io (%s)\n",
 447                 rsnd_mod_name(mod), rsnd_mod_id(mod),
 448                 rsnd_io_is_play(io) ? "Playback" : "Capture");
 449
 450         return 0;
 451 }
 452
 453 static void rsnd_dai_disconnect(struct rsnd_mod *mod,
 454                                 struct rsnd_dai_stream *io,
 455                                 enum rsnd_mod_type type)
 456 {
 457         io->mod[type] = NULL;
 458 }
 459
 460 struct rsnd_dai *rsnd_rdai_get(struct rsnd_priv *priv, int id)
 461 {
 462         if ((id < 0) || (id >= rsnd_rdai_nr(priv)))
 463                 return NULL;
 464
 465         return priv->rdai + id;
 466 }
 467
 468 #define rsnd_dai_to_priv(dai) snd_soc_dai_get_drvdata(dai)
 469 static struct rsnd_dai *rsnd_dai_to_rdai(struct snd_soc_dai *dai)
 470 {
 471         struct rsnd_priv *priv = rsnd_dai_to_priv(dai);
 472
 473         return rsnd_rdai_get(priv, dai->id);
 474 }
 475
 476 /*
 477  *      rsnd_soc_dai functions
 478  */
 479 int rsnd_dai_pointer_offset(struct rsnd_dai_stream *io, int additional)
 480 {
 481         struct snd_pcm_substream *substream = io->substream;
 482         struct snd_pcm_runtime *runtime = substream->runtime;
 483         int pos = io->byte_pos + additional;
 484
 485         pos %= (runtime->periods * io->byte_per_period);
 486
 487         return pos;
 488 }
 489
 490 bool rsnd_dai_pointer_update(struct rsnd_dai_stream *io, int byte)
 491 {
 492         io->byte_pos += byte;
 493
 494         if (io->byte_pos >= io->next_period_byte) {
 495                 struct snd_pcm_substream *substream = io->substream;
 496                 struct snd_pcm_runtime *runtime = substream->runtime;
 497
 498                 io->period_pos++;
 499                 io->next_period_byte += io->byte_per_period;
 500
 501                 if (io->period_pos >= runtime->periods) {
 502                         io->byte_pos = 0;
 503                         io->period_pos = 0;
 504                         io->next_period_byte = io->byte_per_period;
 505                 }
 506
 507                 return true;
 508         }
 509
 510         return false;
 511 }
 512
 513 void rsnd_dai_period_elapsed(struct rsnd_dai_stream *io)
 514 {
 515         struct snd_pcm_substream *substream = io->substream;
 516
 517         /*
 518          * this function should be called...
 519          *
 520          * - if rsnd_dai_pointer_update() returns true
 521          * - without spin lock
 522          */
 523
 524         snd_pcm_period_elapsed(substream);
 525 }
 526
 527 static void rsnd_dai_stream_init(struct rsnd_dai_stream *io,
 528                                 struct snd_pcm_substream *substream)
 529 {
 530         struct snd_pcm_runtime *runtime = substream->runtime;
 531
 532         io->substream           = substream;
 533         io->byte_pos            = 0;
 534         io->period_pos          = 0;
 535         io->byte_per_period     = runtime->period_size *
 536                                   runtime->channels *
 537                                   samples_to_bytes(runtime, 1);
 538         io->next_period_byte    = io->byte_per_period;
 539 }
 540
 541 static void rsnd_dai_stream_quit(struct rsnd_dai_stream *io)
 542 {
 543         io->substream           = NULL;
 544 }
 545
 546 static
 547 struct snd_soc_dai *rsnd_substream_to_dai(struct snd_pcm_substream *substream)
 548 {
 549         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 550
 551         return  rtd->cpu_dai;
 552 }
 553
 554 static
 555 struct rsnd_dai_stream *rsnd_rdai_to_io(struct rsnd_dai *rdai,
 556                                         struct snd_pcm_substream *substream)
 557 {
 558         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 559                 return &rdai->playback;
 560         else
 561                 return &rdai->capture;
 562 }
 563
 564 static int rsnd_soc_dai_trigger(struct snd_pcm_substream *substream, int cmd,
 565                             struct snd_soc_dai *dai)
 566 {
 567         struct rsnd_priv *priv = rsnd_dai_to_priv(dai);
 568         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
 569         struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream);
 570         int ret;
 571         unsigned long flags;
 572
 573         spin_lock_irqsave(&priv->lock, flags);
 574
 575         switch (cmd) {
 576         case SNDRV_PCM_TRIGGER_START:
 577                 rsnd_dai_stream_init(io, substream);
 578
 579                 ret = rsnd_dai_call(init, io, priv);
 580                 if (ret < 0)
 581                         goto dai_trigger_end;
 582
 583                 ret = rsnd_dai_call(start, io, priv);
 584                 if (ret < 0)
 585                         goto dai_trigger_end;
 586
 587                 ret = rsnd_dai_call(irq, io, priv, 1);
 588                 if (ret < 0)
 589                         goto dai_trigger_end;
 590
 591                 break;
 592         case SNDRV_PCM_TRIGGER_STOP:
 593                 ret = rsnd_dai_call(irq, io, priv, 0);
 594
 595                 ret |= rsnd_dai_call(stop, io, priv);
 596
 597                 ret |= rsnd_dai_call(quit, io, priv);
 598
 599                 rsnd_dai_stream_quit(io);
 600                 break;
 601         default:
 602                 ret = -EINVAL;
 603         }
 604
 605 dai_trigger_end:
 606         spin_unlock_irqrestore(&priv->lock, flags);
 607
 608         return ret;
 609 }
 610
 611 static int rsnd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
 612 {
 613         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
 614
 615         /* set master/slave audio interface */
 616         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 617         case SND_SOC_DAIFMT_CBM_CFM:
 618                 rdai->clk_master = 0;
 619                 break;
 620         case SND_SOC_DAIFMT_CBS_CFS:
 621                 rdai->clk_master = 1; /* codec is slave, cpu is master */
 622                 break;
 623         default:
 624                 return -EINVAL;
 625         }
 626
 627         /* set format */
 628         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 629         case SND_SOC_DAIFMT_I2S:
 630                 rdai->sys_delay = 0;
 631                 rdai->data_alignment = 0;
 632                 rdai->frm_clk_inv = 0;
 633                 break;
 634         case SND_SOC_DAIFMT_LEFT_J:
 635                 rdai->sys_delay = 1;
 636                 rdai->data_alignment = 0;
 637                 rdai->frm_clk_inv = 1;
 638                 break;
 639         case SND_SOC_DAIFMT_RIGHT_J:
 640                 rdai->sys_delay = 1;
 641                 rdai->data_alignment = 1;
 642                 rdai->frm_clk_inv = 1;
 643                 break;
 644         }
 645
 646         /* set clock inversion */
 647         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
 648         case SND_SOC_DAIFMT_NB_IF:
 649                 rdai->bit_clk_inv =  rdai->bit_clk_inv;
 650                 rdai->frm_clk_inv = !rdai->frm_clk_inv;
 651                 break;
 652         case SND_SOC_DAIFMT_IB_NF:
 653                 rdai->bit_clk_inv = !rdai->bit_clk_inv;
 654                 rdai->frm_clk_inv =  rdai->frm_clk_inv;
 655                 break;
 656         case SND_SOC_DAIFMT_IB_IF:
 657                 rdai->bit_clk_inv = !rdai->bit_clk_inv;
 658                 rdai->frm_clk_inv = !rdai->frm_clk_inv;
 659                 break;
 660         case SND_SOC_DAIFMT_NB_NF:
 661         default:
 662                 break;
 663         }
 664
 665         return 0;
 666 }
 667
 668 static int rsnd_soc_set_dai_tdm_slot(struct snd_soc_dai *dai,
 669                                      u32 tx_mask, u32 rx_mask,
 670                                      int slots, int slot_width)
 671 {
 672         struct rsnd_priv *priv = rsnd_dai_to_priv(dai);
 673         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
 674         struct device *dev = rsnd_priv_to_dev(priv);
 675
 676         switch (slots) {
 677         case 6:
 678                 /* TDM Extend Mode */
 679                 rsnd_set_slot(rdai, slots, 1);
 680                 break;
 681         default:
 682                 dev_err(dev, "unsupported TDM slots (%d)\n", slots);
 683                 return -EINVAL;
 684         }
 685
 686         return 0;
 687 }
 688
 689 static const struct snd_soc_dai_ops rsnd_soc_dai_ops = {
 690         .trigger        = rsnd_soc_dai_trigger,
 691         .set_fmt        = rsnd_soc_dai_set_fmt,
 692         .set_tdm_slot   = rsnd_soc_set_dai_tdm_slot,
 693 };
 694
 695 void rsnd_parse_connect_common(struct rsnd_dai *rdai,
 696                 struct rsnd_mod* (*mod_get)(struct rsnd_priv *priv, int id),
 697                 struct device_node *node,
 698                 struct device_node *playback,
 699                 struct device_node *capture)
 700 {
 701         struct rsnd_priv *priv = rsnd_rdai_to_priv(rdai);
 702         struct device_node *np;
 703         struct rsnd_mod *mod;
 704         int i;
 705
 706         if (!node)
 707                 return;
 708
 709         i = 0;
 710         for_each_child_of_node(node, np) {
 711                 mod = mod_get(priv, i);
 712                 if (np == playback)
 713                         rsnd_dai_connect(mod, &rdai->playback, mod->type);
 714                 if (np == capture)
 715                         rsnd_dai_connect(mod, &rdai->capture, mod->type);
 716                 i++;
 717         }
 718
 719         of_node_put(node);
 720 }
 721
 722 static int rsnd_dai_probe(struct rsnd_priv *priv)
 723 {
 724         struct device_node *dai_node;
 725         struct device_node *dai_np;
 726         struct device_node *playback, *capture;
 727         struct rsnd_dai_stream *io_playback;
 728         struct rsnd_dai_stream *io_capture;
 729         struct snd_soc_dai_driver *rdrv, *drv;
 730         struct rsnd_dai *rdai;
 731         struct device *dev = rsnd_priv_to_dev(priv);
 732         int nr, dai_i, io_i;
 733         int ret;
 734
 735         dai_node = rsnd_dai_of_node(priv);
 736         nr = of_get_child_count(dai_node);
 737         if (!nr) {
 738                 ret = -EINVAL;
 739                 goto rsnd_dai_probe_done;
 740         }
 741
 742         rdrv = devm_kzalloc(dev, sizeof(*rdrv) * nr, GFP_KERNEL);
 743         rdai = devm_kzalloc(dev, sizeof(*rdai) * nr, GFP_KERNEL);
 744         if (!rdrv || !rdai) {
 745                 ret = -ENOMEM;
 746                 goto rsnd_dai_probe_done;
 747         }
 748
 749         priv->rdai_nr   = nr;
 750         priv->daidrv    = rdrv;
 751         priv->rdai      = rdai;
 752
 753         /*
 754          * parse all dai
 755          */
 756         dai_i = 0;
 757         for_each_child_of_node(dai_node, dai_np) {
 758                 rdai            = rsnd_rdai_get(priv, dai_i);
 759                 drv             = rdrv + dai_i;
 760                 io_playback     = &rdai->playback;
 761                 io_capture      = &rdai->capture;
 762
 763                 snprintf(rdai->name, RSND_DAI_NAME_SIZE, "rsnd-dai.%d", dai_i);
 764
 765                 rdai->priv      = priv;
 766                 drv->name       = rdai->name;
 767                 drv->ops        = &rsnd_soc_dai_ops;
 768
 769                 snprintf(rdai->playback.name, RSND_DAI_NAME_SIZE,
 770                          "DAI%d Playback", dai_i);
 771                 drv->playback.rates             = RSND_RATES;
 772                 drv->playback.formats           = RSND_FMTS;
 773                 drv->playback.channels_min      = 2;
 774                 drv->playback.channels_max      = 6;
 775                 drv->playback.stream_name       = rdai->playback.name;
 776
 777                 snprintf(rdai->capture.name, RSND_DAI_NAME_SIZE,
 778                          "DAI%d Capture", dai_i);
 779                 drv->capture.rates              = RSND_RATES;
 780                 drv->capture.formats            = RSND_FMTS;
 781                 drv->capture.channels_min       = 2;
 782                 drv->capture.channels_max       = 6;
 783                 drv->capture.stream_name        = rdai->capture.name;
 784
 785                 rdai->playback.rdai             = rdai;
 786                 rdai->capture.rdai              = rdai;
 787                 rsnd_set_slot(rdai, 2, 1); /* default */
 788
 789                 for (io_i = 0;; io_i++) {
 790                         playback = of_parse_phandle(dai_np, "playback", io_i);
 791                         capture  = of_parse_phandle(dai_np, "capture", io_i);
 792
 793                         if (!playback && !capture)
 794                                 break;
 795
 796                         rsnd_parse_connect_ssi(rdai, playback, capture);
 797                         rsnd_parse_connect_src(rdai, playback, capture);
 798                         rsnd_parse_connect_ctu(rdai, playback, capture);
 799                         rsnd_parse_connect_mix(rdai, playback, capture);
 800                         rsnd_parse_connect_dvc(rdai, playback, capture);
 801
 802                         of_node_put(playback);
 803                         of_node_put(capture);
 804                 }
 805
 806                 dai_i++;
 807
 808                 dev_dbg(dev, "%s (%s/%s)\n", rdai->name,
 809                         rsnd_io_to_mod_ssi(io_playback) ? "play"    : " -- ",
 810                         rsnd_io_to_mod_ssi(io_capture) ? "capture" : "  --   ");
 811         }
 812
 813         ret = 0;
 814
 815 rsnd_dai_probe_done:
 816         of_node_put(dai_node);
 817
 818         return ret;
 819 }
 820
 821 /*
 822  *              pcm ops
 823  */
 824 static struct snd_pcm_hardware rsnd_pcm_hardware = {
 825         .info =         SNDRV_PCM_INFO_INTERLEAVED      |
 826                         SNDRV_PCM_INFO_MMAP             |
 827                         SNDRV_PCM_INFO_MMAP_VALID,
 828         .buffer_bytes_max       = 64 * 1024,
 829         .period_bytes_min       = 32,
 830         .period_bytes_max       = 8192,
 831         .periods_min            = 1,
 832         .periods_max            = 32,
 833         .fifo_size              = 256,
 834 };
 835
 836 static int rsnd_pcm_open(struct snd_pcm_substream *substream)
 837 {
 838         struct snd_pcm_runtime *runtime = substream->runtime;
 839         int ret = 0;
 840
 841         snd_soc_set_runtime_hwparams(substream, &rsnd_pcm_hardware);
 842
 843         ret = snd_pcm_hw_constraint_integer(runtime,
 844                                             SNDRV_PCM_HW_PARAM_PERIODS);
 845
 846         return ret;
 847 }
 848
 849 static int rsnd_hw_params(struct snd_pcm_substream *substream,
 850                          struct snd_pcm_hw_params *hw_params)
 851 {
 852         struct snd_soc_dai *dai = rsnd_substream_to_dai(substream);
 853         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
 854         struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream);
 855         int ret;
 856
 857         ret = rsnd_dai_call(hw_params, io, substream, hw_params);
 858         if (ret)
 859                 return ret;
 860
 861         return snd_pcm_lib_malloc_pages(substream,
 862                                         params_buffer_bytes(hw_params));
 863 }
 864
 865 static snd_pcm_uframes_t rsnd_pointer(struct snd_pcm_substream *substream)
 866 {
 867         struct snd_pcm_runtime *runtime = substream->runtime;
 868         struct snd_soc_dai *dai = rsnd_substream_to_dai(substream);
 869         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
 870         struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream);
 871
 872         return bytes_to_frames(runtime, io->byte_pos);
 873 }
 874
 875 static struct snd_pcm_ops rsnd_pcm_ops = {
 876         .open           = rsnd_pcm_open,
 877         .ioctl          = snd_pcm_lib_ioctl,
 878         .hw_params      = rsnd_hw_params,
 879         .hw_free        = snd_pcm_lib_free_pages,
 880         .pointer        = rsnd_pointer,
 881 };
 882
 883 /*
 884  *              snd_kcontrol
 885  */
 886 #define kcontrol_to_cfg(kctrl) ((struct rsnd_kctrl_cfg *)kctrl->private_value)
 887 static int rsnd_kctrl_info(struct snd_kcontrol *kctrl,
 888                            struct snd_ctl_elem_info *uinfo)
 889 {
 890         struct rsnd_kctrl_cfg *cfg = kcontrol_to_cfg(kctrl);
 891
 892         if (cfg->texts) {
 893                 uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
 894                 uinfo->count = cfg->size;
 895                 uinfo->value.enumerated.items = cfg->max;
 896                 if (uinfo->value.enumerated.item >= cfg->max)
 897                         uinfo->value.enumerated.item = cfg->max - 1;
 898                 strlcpy(uinfo->value.enumerated.name,
 899                         cfg->texts[uinfo->value.enumerated.item],
 900                         sizeof(uinfo->value.enumerated.name));
 901         } else {
 902                 uinfo->count = cfg->size;
 903                 uinfo->value.integer.min = 0;
 904                 uinfo->value.integer.max = cfg->max;
 905                 uinfo->type = (cfg->max == 1) ?
 906                         SNDRV_CTL_ELEM_TYPE_BOOLEAN :
 907                         SNDRV_CTL_ELEM_TYPE_INTEGER;
 908         }
 909
 910         return 0;
 911 }
 912
 913 static int rsnd_kctrl_get(struct snd_kcontrol *kctrl,
 914                           struct snd_ctl_elem_value *uc)
 915 {
 916         struct rsnd_kctrl_cfg *cfg = kcontrol_to_cfg(kctrl);
 917         int i;
 918
 919         for (i = 0; i < cfg->size; i++)
 920                 if (cfg->texts)
 921                         uc->value.enumerated.item[i] = cfg->val[i];
 922                 else
 923                         uc->value.integer.value[i] = cfg->val[i];
 924
 925         return 0;
 926 }
 927
 928 static int rsnd_kctrl_put(struct snd_kcontrol *kctrl,
 929                           struct snd_ctl_elem_value *uc)
 930 {
 931         struct rsnd_mod *mod = snd_kcontrol_chip(kctrl);
 932         struct rsnd_kctrl_cfg *cfg = kcontrol_to_cfg(kctrl);
 933         int i, change = 0;
 934
 935         for (i = 0; i < cfg->size; i++) {
 936                 if (cfg->texts) {
 937                         change |= (uc->value.enumerated.item[i] != cfg->val[i]);
 938                         cfg->val[i] = uc->value.enumerated.item[i];
 939                 } else {
 940                         change |= (uc->value.integer.value[i] != cfg->val[i]);
 941                         cfg->val[i] = uc->value.integer.value[i];
 942                 }
 943         }
 944
 945         if (change && cfg->update)
 946                 cfg->update(cfg->io, mod);
 947
 948         return change;
 949 }
 950
 951 static int __rsnd_kctrl_new(struct rsnd_mod *mod,
 952                             struct rsnd_dai_stream *io,
 953                             struct snd_soc_pcm_runtime *rtd,
 954                             const unsigned char *name,
 955                             struct rsnd_kctrl_cfg *cfg,
 956                             void (*update)(struct rsnd_dai_stream *io,
 957                                            struct rsnd_mod *mod))
 958 {
 959         struct snd_card *card = rtd->card->snd_card;
 960         struct snd_kcontrol *kctrl;
 961         struct snd_kcontrol_new knew = {
 962                 .iface          = SNDRV_CTL_ELEM_IFACE_MIXER,
 963                 .name           = name,
 964                 .info           = rsnd_kctrl_info,
 965                 .index          = rtd->num,
 966                 .get            = rsnd_kctrl_get,
 967                 .put            = rsnd_kctrl_put,
 968                 .private_value  = (unsigned long)cfg,
 969         };
 970         int ret;
 971
 972         kctrl = snd_ctl_new1(&knew, mod);
 973         if (!kctrl)
 974                 return -ENOMEM;
 975
 976         ret = snd_ctl_add(card, kctrl);
 977         if (ret < 0) {
 978                 snd_ctl_free_one(kctrl);
 979                 return ret;
 980         }
 981
 982         cfg->update = update;
 983         cfg->card = card;
 984         cfg->kctrl = kctrl;
 985         cfg->io = io;
 986
 987         return 0;
 988 }
 989
 990 void _rsnd_kctrl_remove(struct rsnd_kctrl_cfg *cfg)
 991 {
 992         snd_ctl_remove(cfg->card, cfg->kctrl);
 993 }
 994
 995 int rsnd_kctrl_new_m(struct rsnd_mod *mod,
 996                      struct rsnd_dai_stream *io,
 997                      struct snd_soc_pcm_runtime *rtd,
 998                      const unsigned char *name,
 999                      void (*update)(struct rsnd_dai_stream *io,
1000                                     struct rsnd_mod *mod),
1001                      struct rsnd_kctrl_cfg_m *_cfg,
1002                      int ch_size,
1003                      u32 max)
1004 {
1005         if (ch_size > RSND_MAX_CHANNELS)
1006                 return -EINVAL;
1007
1008         _cfg->cfg.max   = max;
1009         _cfg->cfg.size  = ch_size;
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_s(struct rsnd_mod *mod,
1015                      struct rsnd_dai_stream *io,
1016                      struct snd_soc_pcm_runtime *rtd,
1017                      const unsigned char *name,
1018                      void (*update)(struct rsnd_dai_stream *io,
1019                                     struct rsnd_mod *mod),
1020                      struct rsnd_kctrl_cfg_s *_cfg,
1021                      u32 max)
1022 {
1023         _cfg->cfg.max   = max;
1024         _cfg->cfg.size  = 1;
1025         _cfg->cfg.val   = &_cfg->val;
1026         return __rsnd_kctrl_new(mod, io, rtd, name, &_cfg->cfg, update);
1027 }
1028
1029 int rsnd_kctrl_new_e(struct rsnd_mod *mod,
1030                      struct rsnd_dai_stream *io,
1031                      struct snd_soc_pcm_runtime *rtd,
1032                      const unsigned char *name,
1033                      struct rsnd_kctrl_cfg_s *_cfg,
1034                      void (*update)(struct rsnd_dai_stream *io,
1035                                     struct rsnd_mod *mod),
1036                      const char * const *texts,
1037                      u32 max)
1038 {
1039         _cfg->cfg.max   = max;
1040         _cfg->cfg.size  = 1;
1041         _cfg->cfg.val   = &_cfg->val;
1042         _cfg->cfg.texts = texts;
1043         return __rsnd_kctrl_new(mod, io, rtd, name, &_cfg->cfg, update);
1044 }
1045
1046 /*
1047  *              snd_soc_platform
1048  */
1049
1050 #define PREALLOC_BUFFER         (32 * 1024)
1051 #define PREALLOC_BUFFER_MAX     (32 * 1024)
1052
1053 static int rsnd_pcm_new(struct snd_soc_pcm_runtime *rtd)
1054 {
1055         struct snd_soc_dai *dai = rtd->cpu_dai;
1056         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
1057         int ret;
1058
1059         ret = rsnd_dai_call(pcm_new, &rdai->playback, rtd);
1060         if (ret)
1061                 return ret;
1062
1063         ret = rsnd_dai_call(pcm_new, &rdai->capture, rtd);
1064         if (ret)
1065                 return ret;
1066
1067         return snd_pcm_lib_preallocate_pages_for_all(
1068                 rtd->pcm,
1069                 SNDRV_DMA_TYPE_DEV,
1070                 rtd->card->snd_card->dev,
1071                 PREALLOC_BUFFER, PREALLOC_BUFFER_MAX);
1072 }
1073
1074 static struct snd_soc_platform_driver rsnd_soc_platform = {
1075         .ops            = &rsnd_pcm_ops,
1076         .pcm_new        = rsnd_pcm_new,
1077 };
1078
1079 static const struct snd_soc_component_driver rsnd_soc_component = {
1080         .name           = "rsnd",
1081 };
1082
1083 static int rsnd_rdai_continuance_probe(struct rsnd_priv *priv,
1084                                        struct rsnd_dai_stream *io)
1085 {
1086         int ret;
1087
1088         ret = rsnd_dai_call(probe, io, priv);
1089         if (ret == -EAGAIN) {
1090                 struct rsnd_mod *ssi_mod = rsnd_io_to_mod_ssi(io);
1091                 int i;
1092
1093                 /*
1094                  * Fallback to PIO mode
1095                  */
1096
1097                 /*
1098                  * call "remove" for SSI/SRC/DVC
1099                  * SSI will be switch to PIO mode if it was DMA mode
1100                  * see
1101                  *      rsnd_dma_init()
1102                  *      rsnd_ssi_fallback()
1103                  */
1104                 rsnd_dai_call(remove, io, priv);
1105
1106                 /*
1107                  * remove all mod from io
1108                  * and, re connect ssi
1109                  */
1110                 for (i = 0; i < RSND_MOD_MAX; i++)
1111                         rsnd_dai_disconnect((io)->mod[i], io, i);
1112                 rsnd_dai_connect(ssi_mod, io, RSND_MOD_SSI);
1113
1114                 /*
1115                  * fallback
1116                  */
1117                 rsnd_dai_call(fallback, io, priv);
1118
1119                 /*
1120                  * retry to "probe".
1121                  * DAI has SSI which is PIO mode only now.
1122                  */
1123                 ret = rsnd_dai_call(probe, io, priv);
1124         }
1125
1126         return ret;
1127 }
1128
1129 /*
1130  *      rsnd probe
1131  */
1132 static int rsnd_probe(struct platform_device *pdev)
1133 {
1134         struct rsnd_priv *priv;
1135         struct device *dev = &pdev->dev;
1136         struct rsnd_dai *rdai;
1137         int (*probe_func[])(struct rsnd_priv *priv) = {
1138                 rsnd_gen_probe,
1139                 rsnd_dma_probe,
1140                 rsnd_ssi_probe,
1141                 rsnd_ssiu_probe,
1142                 rsnd_src_probe,
1143                 rsnd_ctu_probe,
1144                 rsnd_mix_probe,
1145                 rsnd_dvc_probe,
1146                 rsnd_cmd_probe,
1147                 rsnd_adg_probe,
1148                 rsnd_dai_probe,
1149         };
1150         int ret, i;
1151
1152         /*
1153          *      init priv data
1154          */
1155         priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
1156         if (!priv) {
1157                 dev_err(dev, "priv allocate failed\n");
1158                 return -ENODEV;
1159         }
1160
1161         priv->pdev      = pdev;
1162         priv->flags     = (unsigned long)of_device_get_match_data(dev);
1163         spin_lock_init(&priv->lock);
1164
1165         /*
1166          *      init each module
1167          */
1168         for (i = 0; i < ARRAY_SIZE(probe_func); i++) {
1169                 ret = probe_func[i](priv);
1170                 if (ret)
1171                         return ret;
1172         }
1173
1174         for_each_rsnd_dai(rdai, priv, i) {
1175                 ret = rsnd_rdai_continuance_probe(priv, &rdai->playback);
1176                 if (ret)
1177                         goto exit_snd_probe;
1178
1179                 ret = rsnd_rdai_continuance_probe(priv, &rdai->capture);
1180                 if (ret)
1181                         goto exit_snd_probe;
1182         }
1183
1184         dev_set_drvdata(dev, priv);
1185
1186         /*
1187          *      asoc register
1188          */
1189         ret = snd_soc_register_platform(dev, &rsnd_soc_platform);
1190         if (ret < 0) {
1191                 dev_err(dev, "cannot snd soc register\n");
1192                 return ret;
1193         }
1194
1195         ret = snd_soc_register_component(dev, &rsnd_soc_component,
1196                                          priv->daidrv, rsnd_rdai_nr(priv));
1197         if (ret < 0) {
1198                 dev_err(dev, "cannot snd dai register\n");
1199                 goto exit_snd_soc;
1200         }
1201
1202         pm_runtime_enable(dev);
1203
1204         dev_info(dev, "probed\n");
1205         return ret;
1206
1207 exit_snd_soc:
1208         snd_soc_unregister_platform(dev);
1209 exit_snd_probe:
1210         for_each_rsnd_dai(rdai, priv, i) {
1211                 rsnd_dai_call(remove, &rdai->playback, priv);
1212                 rsnd_dai_call(remove, &rdai->capture, priv);
1213         }
1214
1215         return ret;
1216 }
1217
1218 static int rsnd_remove(struct platform_device *pdev)
1219 {
1220         struct rsnd_priv *priv = dev_get_drvdata(&pdev->dev);
1221         struct rsnd_dai *rdai;
1222         void (*remove_func[])(struct rsnd_priv *priv) = {
1223                 rsnd_ssi_remove,
1224                 rsnd_ssiu_remove,
1225                 rsnd_src_remove,
1226                 rsnd_ctu_remove,
1227                 rsnd_mix_remove,
1228                 rsnd_dvc_remove,
1229                 rsnd_cmd_remove,
1230                 rsnd_adg_remove,
1231         };
1232         int ret = 0, i;
1233
1234         pm_runtime_disable(&pdev->dev);
1235
1236         for_each_rsnd_dai(rdai, priv, i) {
1237                 ret |= rsnd_dai_call(remove, &rdai->playback, priv);
1238                 ret |= rsnd_dai_call(remove, &rdai->capture, priv);
1239         }
1240
1241         for (i = 0; i < ARRAY_SIZE(remove_func); i++)
1242                 remove_func[i](priv);
1243
1244         snd_soc_unregister_component(&pdev->dev);
1245         snd_soc_unregister_platform(&pdev->dev);
1246
1247         return ret;
1248 }
1249
1250 static struct platform_driver rsnd_driver = {
1251         .driver = {
1252                 .name   = "rcar_sound",
1253                 .of_match_table = rsnd_of_match,
1254         },
1255         .probe          = rsnd_probe,
1256         .remove         = rsnd_remove,
1257 };
1258 module_platform_driver(rsnd_driver);
1259
1260 MODULE_LICENSE("GPL");
1261 MODULE_DESCRIPTION("Renesas R-Car audio driver");
1262 MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");
1263 MODULE_ALIAS("platform:rcar-pcm-audio");