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 int rsnd_mod_init(struct rsnd_priv *priv,
 142                   struct rsnd_mod *mod,
 143                    struct rsnd_mod_ops *ops,
 144                    struct clk *clk,
 145                    enum rsnd_mod_type type,
 146                    int id)
 147 {
 148         int ret = clk_prepare(clk);
 149
 150         if (ret)
 151                 return ret;
 152
 153         mod->id         = id;
 154         mod->ops        = ops;
 155         mod->type       = type;
 156         mod->clk        = clk;
 157         mod->priv       = priv;
 158
 159         return ret;
 160 }
 161
 162 void rsnd_mod_quit(struct rsnd_mod *mod)
 163 {
 164         if (mod->clk)
 165                 clk_unprepare(mod->clk);
 166 }
 167
 168 void rsnd_mod_interrupt(struct rsnd_mod *mod,
 169                         void (*callback)(struct rsnd_mod *mod,
 170                                          struct rsnd_dai_stream *io))
 171 {
 172         struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
 173         struct rsnd_dai_stream *io;
 174         struct rsnd_dai *rdai;
 175         int i;
 176
 177         for_each_rsnd_dai(rdai, priv, i) {
 178                 io = &rdai->playback;
 179                 if (mod == io->mod[mod->type])
 180                         callback(mod, io);
 181
 182                 io = &rdai->capture;
 183                 if (mod == io->mod[mod->type])
 184                         callback(mod, io);
 185         }
 186 }
 187
 188 int rsnd_io_is_working(struct rsnd_dai_stream *io)
 189 {
 190         /* see rsnd_dai_stream_init/quit() */
 191         return !!io->substream;
 192 }
 193
 194 void rsnd_set_slot(struct rsnd_dai *rdai,
 195                    int slots, int num)
 196 {
 197         rdai->slots     = slots;
 198         rdai->slots_num = num;
 199 }
 200
 201 int rsnd_get_slot(struct rsnd_dai_stream *io)
 202 {
 203         struct rsnd_dai *rdai = rsnd_io_to_rdai(io);
 204
 205         return rdai->slots;
 206 }
 207
 208 int rsnd_get_slot_num(struct rsnd_dai_stream *io)
 209 {
 210         struct rsnd_dai *rdai = rsnd_io_to_rdai(io);
 211
 212         return rdai->slots_num;
 213 }
 214
 215 int rsnd_get_slot_width(struct rsnd_dai_stream *io)
 216 {
 217         struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
 218         int chan = runtime->channels;
 219
 220         /* Multi channel Mode */
 221         if (rsnd_ssi_multi_slaves(io))
 222                 chan /= rsnd_get_slot_num(io);
 223
 224         /* TDM Extend Mode needs 8ch */
 225         if (chan == 6)
 226                 chan = 8;
 227
 228         return chan;
 229 }
 230
 231 /*
 232  *      ADINR function
 233  */
 234 u32 rsnd_get_adinr_bit(struct rsnd_mod *mod, struct rsnd_dai_stream *io)
 235 {
 236         struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
 237         struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
 238         struct device *dev = rsnd_priv_to_dev(priv);
 239
 240         switch (runtime->sample_bits) {
 241         case 16:
 242                 return 8 << 16;
 243         case 32:
 244                 return 0 << 16;
 245         }
 246
 247         dev_warn(dev, "not supported sample bits\n");
 248
 249         return 0;
 250 }
 251
 252 u32 rsnd_get_adinr_chan(struct rsnd_mod *mod, struct rsnd_dai_stream *io)
 253 {
 254         struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
 255         struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
 256         struct device *dev = rsnd_priv_to_dev(priv);
 257         u32 chan = runtime->channels;
 258
 259         switch (chan) {
 260         case 1:
 261         case 2:
 262         case 4:
 263         case 6:
 264         case 8:
 265                 break;
 266         default:
 267                 dev_warn(dev, "not supported channel\n");
 268                 chan = 0;
 269                 break;
 270         }
 271
 272         return chan;
 273 }
 274
 275 /*
 276  *      DALIGN function
 277  */
 278 u32 rsnd_get_dalign(struct rsnd_mod *mod, struct rsnd_dai_stream *io)
 279 {
 280         struct rsnd_mod *ssi = rsnd_io_to_mod_ssi(io);
 281         struct rsnd_mod *target;
 282         struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
 283         u32 val = 0x76543210;
 284         u32 mask = ~0;
 285
 286         if (rsnd_io_is_play(io)) {
 287                 struct rsnd_mod *src = rsnd_io_to_mod_src(io);
 288
 289                 target = src ? src : ssi;
 290         } else {
 291                 struct rsnd_mod *cmd = rsnd_io_to_mod_cmd(io);
 292
 293                 target = cmd ? cmd : ssi;
 294         }
 295
 296         mask <<= runtime->channels * 4;
 297         val = val & mask;
 298
 299         switch (runtime->sample_bits) {
 300         case 16:
 301                 val |= 0x67452301 & ~mask;
 302                 break;
 303         case 32:
 304                 val |= 0x76543210 & ~mask;
 305                 break;
 306         }
 307
 308         /*
 309          * exchange channeles on SRC if possible,
 310          * otherwise, R/L volume settings on DVC
 311          * changes inverted channels
 312          */
 313         if (mod == target)
 314                 return val;
 315         else
 316                 return 0x76543210;
 317 }
 318
 319 /*
 320  *      rsnd_dai functions
 321  */
 322 #define rsnd_mod_call(idx, io, func, param...)                  \
 323 ({                                                              \
 324         struct rsnd_priv *priv = rsnd_mod_to_priv(mod);         \
 325         struct rsnd_mod *mod = (io)->mod[idx];                  \
 326         struct device *dev = rsnd_priv_to_dev(priv);            \
 327         u32 *status = (io)->mod_status + idx;                   \
 328         u32 mask = 0xF << __rsnd_mod_shift_##func;                      \
 329         u8 val  = (*status >> __rsnd_mod_shift_##func) & 0xF;           \
 330         u8 add  = ((val + __rsnd_mod_add_##func) & 0xF);                \
 331         int ret = 0;                                                    \
 332         int call = (val == __rsnd_mod_call_##func) && (mod)->ops->func; \
 333         *status = (*status & ~mask) +                                   \
 334                 (add << __rsnd_mod_shift_##func);                       \
 335         dev_dbg(dev, "%s[%d]\t0x%08x %s\n",                             \
 336                 rsnd_mod_name(mod), rsnd_mod_id(mod),                   \
 337                 *status, call ? #func : "");                            \
 338         if (call)                                                       \
 339                 ret = (mod)->ops->func(mod, io, param);                 \
 340         ret;                                                            \
 341 })
 342
 343 #define rsnd_dai_call(fn, io, param...)                         \
 344 ({                                                              \
 345         struct rsnd_mod *mod;                                   \
 346         int ret = 0, i;                                         \
 347         for (i = 0; i < RSND_MOD_MAX; i++) {                    \
 348                 mod = (io)->mod[i];                             \
 349                 if (!mod)                                       \
 350                         continue;                               \
 351                 ret |= rsnd_mod_call(i, io, fn, param);         \
 352         }                                                       \
 353         ret;                                                    \
 354 })
 355
 356 int rsnd_dai_connect(struct rsnd_mod *mod,
 357                      struct rsnd_dai_stream *io,
 358                      enum rsnd_mod_type type)
 359 {
 360         struct rsnd_priv *priv;
 361         struct device *dev;
 362
 363         if (!mod)
 364                 return -EIO;
 365
 366         if (io->mod[type])
 367                 return -EINVAL;
 368
 369         priv = rsnd_mod_to_priv(mod);
 370         dev = rsnd_priv_to_dev(priv);
 371
 372         io->mod[type] = mod;
 373
 374         dev_dbg(dev, "%s[%d] is connected to io (%s)\n",
 375                 rsnd_mod_name(mod), rsnd_mod_id(mod),
 376                 rsnd_io_is_play(io) ? "Playback" : "Capture");
 377
 378         return 0;
 379 }
 380
 381 static void rsnd_dai_disconnect(struct rsnd_mod *mod,
 382                                 struct rsnd_dai_stream *io,
 383                                 enum rsnd_mod_type type)
 384 {
 385         io->mod[type] = NULL;
 386 }
 387
 388 struct rsnd_dai *rsnd_rdai_get(struct rsnd_priv *priv, int id)
 389 {
 390         if ((id < 0) || (id >= rsnd_rdai_nr(priv)))
 391                 return NULL;
 392
 393         return priv->rdai + id;
 394 }
 395
 396 #define rsnd_dai_to_priv(dai) snd_soc_dai_get_drvdata(dai)
 397 static struct rsnd_dai *rsnd_dai_to_rdai(struct snd_soc_dai *dai)
 398 {
 399         struct rsnd_priv *priv = rsnd_dai_to_priv(dai);
 400
 401         return rsnd_rdai_get(priv, dai->id);
 402 }
 403
 404 /*
 405  *      rsnd_soc_dai functions
 406  */
 407 int rsnd_dai_pointer_offset(struct rsnd_dai_stream *io, int additional)
 408 {
 409         struct snd_pcm_substream *substream = io->substream;
 410         struct snd_pcm_runtime *runtime = substream->runtime;
 411         int pos = io->byte_pos + additional;
 412
 413         pos %= (runtime->periods * io->byte_per_period);
 414
 415         return pos;
 416 }
 417
 418 bool rsnd_dai_pointer_update(struct rsnd_dai_stream *io, int byte)
 419 {
 420         io->byte_pos += byte;
 421
 422         if (io->byte_pos >= io->next_period_byte) {
 423                 struct snd_pcm_substream *substream = io->substream;
 424                 struct snd_pcm_runtime *runtime = substream->runtime;
 425
 426                 io->period_pos++;
 427                 io->next_period_byte += io->byte_per_period;
 428
 429                 if (io->period_pos >= runtime->periods) {
 430                         io->byte_pos = 0;
 431                         io->period_pos = 0;
 432                         io->next_period_byte = io->byte_per_period;
 433                 }
 434
 435                 return true;
 436         }
 437
 438         return false;
 439 }
 440
 441 void rsnd_dai_period_elapsed(struct rsnd_dai_stream *io)
 442 {
 443         struct snd_pcm_substream *substream = io->substream;
 444
 445         /*
 446          * this function should be called...
 447          *
 448          * - if rsnd_dai_pointer_update() returns true
 449          * - without spin lock
 450          */
 451
 452         snd_pcm_period_elapsed(substream);
 453 }
 454
 455 static void rsnd_dai_stream_init(struct rsnd_dai_stream *io,
 456                                 struct snd_pcm_substream *substream)
 457 {
 458         struct snd_pcm_runtime *runtime = substream->runtime;
 459
 460         io->substream           = substream;
 461         io->byte_pos            = 0;
 462         io->period_pos          = 0;
 463         io->byte_per_period     = runtime->period_size *
 464                                   runtime->channels *
 465                                   samples_to_bytes(runtime, 1);
 466         io->next_period_byte    = io->byte_per_period;
 467 }
 468
 469 static void rsnd_dai_stream_quit(struct rsnd_dai_stream *io)
 470 {
 471         io->substream           = NULL;
 472 }
 473
 474 static
 475 struct snd_soc_dai *rsnd_substream_to_dai(struct snd_pcm_substream *substream)
 476 {
 477         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 478
 479         return  rtd->cpu_dai;
 480 }
 481
 482 static
 483 struct rsnd_dai_stream *rsnd_rdai_to_io(struct rsnd_dai *rdai,
 484                                         struct snd_pcm_substream *substream)
 485 {
 486         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 487                 return &rdai->playback;
 488         else
 489                 return &rdai->capture;
 490 }
 491
 492 static int rsnd_soc_dai_trigger(struct snd_pcm_substream *substream, int cmd,
 493                             struct snd_soc_dai *dai)
 494 {
 495         struct rsnd_priv *priv = rsnd_dai_to_priv(dai);
 496         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
 497         struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream);
 498         int ret;
 499         unsigned long flags;
 500
 501         spin_lock_irqsave(&priv->lock, flags);
 502
 503         switch (cmd) {
 504         case SNDRV_PCM_TRIGGER_START:
 505                 rsnd_dai_stream_init(io, substream);
 506
 507                 ret = rsnd_dai_call(init, io, priv);
 508                 if (ret < 0)
 509                         goto dai_trigger_end;
 510
 511                 ret = rsnd_dai_call(start, io, priv);
 512                 if (ret < 0)
 513                         goto dai_trigger_end;
 514                 break;
 515         case SNDRV_PCM_TRIGGER_STOP:
 516                 ret = rsnd_dai_call(stop, io, priv);
 517
 518                 ret |= rsnd_dai_call(quit, io, priv);
 519
 520                 rsnd_dai_stream_quit(io);
 521                 break;
 522         default:
 523                 ret = -EINVAL;
 524         }
 525
 526 dai_trigger_end:
 527         spin_unlock_irqrestore(&priv->lock, flags);
 528
 529         return ret;
 530 }
 531
 532 static int rsnd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
 533 {
 534         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
 535
 536         /* set master/slave audio interface */
 537         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 538         case SND_SOC_DAIFMT_CBM_CFM:
 539                 rdai->clk_master = 0;
 540                 break;
 541         case SND_SOC_DAIFMT_CBS_CFS:
 542                 rdai->clk_master = 1; /* codec is slave, cpu is master */
 543                 break;
 544         default:
 545                 return -EINVAL;
 546         }
 547
 548         /* set format */
 549         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 550         case SND_SOC_DAIFMT_I2S:
 551                 rdai->sys_delay = 0;
 552                 rdai->data_alignment = 0;
 553                 rdai->frm_clk_inv = 0;
 554                 break;
 555         case SND_SOC_DAIFMT_LEFT_J:
 556                 rdai->sys_delay = 1;
 557                 rdai->data_alignment = 0;
 558                 rdai->frm_clk_inv = 1;
 559                 break;
 560         case SND_SOC_DAIFMT_RIGHT_J:
 561                 rdai->sys_delay = 1;
 562                 rdai->data_alignment = 1;
 563                 rdai->frm_clk_inv = 1;
 564                 break;
 565         }
 566
 567         /* set clock inversion */
 568         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
 569         case SND_SOC_DAIFMT_NB_IF:
 570                 rdai->bit_clk_inv =  rdai->bit_clk_inv;
 571                 rdai->frm_clk_inv = !rdai->frm_clk_inv;
 572                 break;
 573         case SND_SOC_DAIFMT_IB_NF:
 574                 rdai->bit_clk_inv = !rdai->bit_clk_inv;
 575                 rdai->frm_clk_inv =  rdai->frm_clk_inv;
 576                 break;
 577         case SND_SOC_DAIFMT_IB_IF:
 578                 rdai->bit_clk_inv = !rdai->bit_clk_inv;
 579                 rdai->frm_clk_inv = !rdai->frm_clk_inv;
 580                 break;
 581         case SND_SOC_DAIFMT_NB_NF:
 582         default:
 583                 break;
 584         }
 585
 586         return 0;
 587 }
 588
 589 static int rsnd_soc_set_dai_tdm_slot(struct snd_soc_dai *dai,
 590                                      u32 tx_mask, u32 rx_mask,
 591                                      int slots, int slot_width)
 592 {
 593         struct rsnd_priv *priv = rsnd_dai_to_priv(dai);
 594         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
 595         struct device *dev = rsnd_priv_to_dev(priv);
 596
 597         switch (slots) {
 598         case 6:
 599                 /* TDM Extend Mode */
 600                 rsnd_set_slot(rdai, slots, 1);
 601                 break;
 602         default:
 603                 dev_err(dev, "unsupported TDM slots (%d)\n", slots);
 604                 return -EINVAL;
 605         }
 606
 607         return 0;
 608 }
 609
 610 static const struct snd_soc_dai_ops rsnd_soc_dai_ops = {
 611         .trigger        = rsnd_soc_dai_trigger,
 612         .set_fmt        = rsnd_soc_dai_set_fmt,
 613         .set_tdm_slot   = rsnd_soc_set_dai_tdm_slot,
 614 };
 615
 616 void rsnd_parse_connect_common(struct rsnd_dai *rdai,
 617                 struct rsnd_mod* (*mod_get)(struct rsnd_priv *priv, int id),
 618                 struct device_node *node,
 619                 struct device_node *playback,
 620                 struct device_node *capture)
 621 {
 622         struct rsnd_priv *priv = rsnd_rdai_to_priv(rdai);
 623         struct device_node *np;
 624         struct rsnd_mod *mod;
 625         int i;
 626
 627         if (!node)
 628                 return;
 629
 630         i = 0;
 631         for_each_child_of_node(node, np) {
 632                 mod = mod_get(priv, i);
 633                 if (np == playback)
 634                         rsnd_dai_connect(mod, &rdai->playback, mod->type);
 635                 if (np == capture)
 636                         rsnd_dai_connect(mod, &rdai->capture, mod->type);
 637                 i++;
 638         }
 639
 640         of_node_put(node);
 641 }
 642
 643 static int rsnd_dai_probe(struct rsnd_priv *priv)
 644 {
 645         struct device_node *dai_node;
 646         struct device_node *dai_np;
 647         struct device_node *playback, *capture;
 648         struct rsnd_dai_stream *io_playback;
 649         struct rsnd_dai_stream *io_capture;
 650         struct snd_soc_dai_driver *rdrv, *drv;
 651         struct rsnd_dai *rdai;
 652         struct device *dev = rsnd_priv_to_dev(priv);
 653         int nr, dai_i, io_i;
 654         int ret;
 655
 656         dai_node = rsnd_dai_of_node(priv);
 657         nr = of_get_child_count(dai_node);
 658         if (!nr) {
 659                 ret = -EINVAL;
 660                 goto rsnd_dai_probe_done;
 661         }
 662
 663         rdrv = devm_kzalloc(dev, sizeof(*rdrv) * nr, GFP_KERNEL);
 664         rdai = devm_kzalloc(dev, sizeof(*rdai) * nr, GFP_KERNEL);
 665         if (!rdrv || !rdai) {
 666                 ret = -ENOMEM;
 667                 goto rsnd_dai_probe_done;
 668         }
 669
 670         priv->rdai_nr   = nr;
 671         priv->daidrv    = rdrv;
 672         priv->rdai      = rdai;
 673
 674         /*
 675          * parse all dai
 676          */
 677         dai_i = 0;
 678         for_each_child_of_node(dai_node, dai_np) {
 679                 rdai            = rsnd_rdai_get(priv, dai_i);
 680                 drv             = rdrv + dai_i;
 681                 io_playback     = &rdai->playback;
 682                 io_capture      = &rdai->capture;
 683
 684                 snprintf(rdai->name, RSND_DAI_NAME_SIZE, "rsnd-dai.%d", dai_i);
 685
 686                 rdai->priv      = priv;
 687                 drv->name       = rdai->name;
 688                 drv->ops        = &rsnd_soc_dai_ops;
 689
 690                 snprintf(rdai->playback.name, RSND_DAI_NAME_SIZE,
 691                          "DAI%d Playback", dai_i);
 692                 drv->playback.rates             = RSND_RATES;
 693                 drv->playback.formats           = RSND_FMTS;
 694                 drv->playback.channels_min      = 2;
 695                 drv->playback.channels_max      = 6;
 696                 drv->playback.stream_name       = rdai->playback.name;
 697
 698                 snprintf(rdai->capture.name, RSND_DAI_NAME_SIZE,
 699                          "DAI%d Capture", dai_i);
 700                 drv->capture.rates              = RSND_RATES;
 701                 drv->capture.formats            = RSND_FMTS;
 702                 drv->capture.channels_min       = 2;
 703                 drv->capture.channels_max       = 6;
 704                 drv->capture.stream_name        = rdai->capture.name;
 705
 706                 rdai->playback.rdai             = rdai;
 707                 rdai->capture.rdai              = rdai;
 708                 rsnd_set_slot(rdai, 2, 1); /* default */
 709
 710                 for (io_i = 0;; io_i++) {
 711                         playback = of_parse_phandle(dai_np, "playback", io_i);
 712                         capture  = of_parse_phandle(dai_np, "capture", io_i);
 713
 714                         if (!playback && !capture)
 715                                 break;
 716
 717                         rsnd_parse_connect_ssi(rdai, playback, capture);
 718                         rsnd_parse_connect_src(rdai, playback, capture);
 719                         rsnd_parse_connect_ctu(rdai, playback, capture);
 720                         rsnd_parse_connect_mix(rdai, playback, capture);
 721                         rsnd_parse_connect_dvc(rdai, playback, capture);
 722
 723                         of_node_put(playback);
 724                         of_node_put(capture);
 725                 }
 726
 727                 dai_i++;
 728
 729                 dev_dbg(dev, "%s (%s/%s)\n", rdai->name,
 730                         rsnd_io_to_mod_ssi(io_playback) ? "play"    : " -- ",
 731                         rsnd_io_to_mod_ssi(io_capture) ? "capture" : "  --   ");
 732         }
 733
 734         ret = 0;
 735
 736 rsnd_dai_probe_done:
 737         of_node_put(dai_node);
 738
 739         return ret;
 740 }
 741
 742 /*
 743  *              pcm ops
 744  */
 745 static struct snd_pcm_hardware rsnd_pcm_hardware = {
 746         .info =         SNDRV_PCM_INFO_INTERLEAVED      |
 747                         SNDRV_PCM_INFO_MMAP             |
 748                         SNDRV_PCM_INFO_MMAP_VALID,
 749         .buffer_bytes_max       = 64 * 1024,
 750         .period_bytes_min       = 32,
 751         .period_bytes_max       = 8192,
 752         .periods_min            = 1,
 753         .periods_max            = 32,
 754         .fifo_size              = 256,
 755 };
 756
 757 static int rsnd_pcm_open(struct snd_pcm_substream *substream)
 758 {
 759         struct snd_pcm_runtime *runtime = substream->runtime;
 760         int ret = 0;
 761
 762         snd_soc_set_runtime_hwparams(substream, &rsnd_pcm_hardware);
 763
 764         ret = snd_pcm_hw_constraint_integer(runtime,
 765                                             SNDRV_PCM_HW_PARAM_PERIODS);
 766
 767         return ret;
 768 }
 769
 770 static int rsnd_hw_params(struct snd_pcm_substream *substream,
 771                          struct snd_pcm_hw_params *hw_params)
 772 {
 773         struct snd_soc_dai *dai = rsnd_substream_to_dai(substream);
 774         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
 775         struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream);
 776         int ret;
 777
 778         ret = rsnd_dai_call(hw_params, io, substream, hw_params);
 779         if (ret)
 780                 return ret;
 781
 782         return snd_pcm_lib_malloc_pages(substream,
 783                                         params_buffer_bytes(hw_params));
 784 }
 785
 786 static snd_pcm_uframes_t rsnd_pointer(struct snd_pcm_substream *substream)
 787 {
 788         struct snd_pcm_runtime *runtime = substream->runtime;
 789         struct snd_soc_dai *dai = rsnd_substream_to_dai(substream);
 790         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
 791         struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream);
 792
 793         return bytes_to_frames(runtime, io->byte_pos);
 794 }
 795
 796 static struct snd_pcm_ops rsnd_pcm_ops = {
 797         .open           = rsnd_pcm_open,
 798         .ioctl          = snd_pcm_lib_ioctl,
 799         .hw_params      = rsnd_hw_params,
 800         .hw_free        = snd_pcm_lib_free_pages,
 801         .pointer        = rsnd_pointer,
 802 };
 803
 804 /*
 805  *              snd_kcontrol
 806  */
 807 #define kcontrol_to_cfg(kctrl) ((struct rsnd_kctrl_cfg *)kctrl->private_value)
 808 static int rsnd_kctrl_info(struct snd_kcontrol *kctrl,
 809                            struct snd_ctl_elem_info *uinfo)
 810 {
 811         struct rsnd_kctrl_cfg *cfg = kcontrol_to_cfg(kctrl);
 812
 813         if (cfg->texts) {
 814                 uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
 815                 uinfo->count = cfg->size;
 816                 uinfo->value.enumerated.items = cfg->max;
 817                 if (uinfo->value.enumerated.item >= cfg->max)
 818                         uinfo->value.enumerated.item = cfg->max - 1;
 819                 strlcpy(uinfo->value.enumerated.name,
 820                         cfg->texts[uinfo->value.enumerated.item],
 821                         sizeof(uinfo->value.enumerated.name));
 822         } else {
 823                 uinfo->count = cfg->size;
 824                 uinfo->value.integer.min = 0;
 825                 uinfo->value.integer.max = cfg->max;
 826                 uinfo->type = (cfg->max == 1) ?
 827                         SNDRV_CTL_ELEM_TYPE_BOOLEAN :
 828                         SNDRV_CTL_ELEM_TYPE_INTEGER;
 829         }
 830
 831         return 0;
 832 }
 833
 834 static int rsnd_kctrl_get(struct snd_kcontrol *kctrl,
 835                           struct snd_ctl_elem_value *uc)
 836 {
 837         struct rsnd_kctrl_cfg *cfg = kcontrol_to_cfg(kctrl);
 838         int i;
 839
 840         for (i = 0; i < cfg->size; i++)
 841                 if (cfg->texts)
 842                         uc->value.enumerated.item[i] = cfg->val[i];
 843                 else
 844                         uc->value.integer.value[i] = cfg->val[i];
 845
 846         return 0;
 847 }
 848
 849 static int rsnd_kctrl_put(struct snd_kcontrol *kctrl,
 850                           struct snd_ctl_elem_value *uc)
 851 {
 852         struct rsnd_mod *mod = snd_kcontrol_chip(kctrl);
 853         struct rsnd_kctrl_cfg *cfg = kcontrol_to_cfg(kctrl);
 854         int i, change = 0;
 855
 856         for (i = 0; i < cfg->size; i++) {
 857                 if (cfg->texts) {
 858                         change |= (uc->value.enumerated.item[i] != cfg->val[i]);
 859                         cfg->val[i] = uc->value.enumerated.item[i];
 860                 } else {
 861                         change |= (uc->value.integer.value[i] != cfg->val[i]);
 862                         cfg->val[i] = uc->value.integer.value[i];
 863                 }
 864         }
 865
 866         if (change)
 867                 cfg->update(cfg->io, mod);
 868
 869         return change;
 870 }
 871
 872 static int __rsnd_kctrl_new(struct rsnd_mod *mod,
 873                             struct rsnd_dai_stream *io,
 874                             struct snd_soc_pcm_runtime *rtd,
 875                             const unsigned char *name,
 876                             struct rsnd_kctrl_cfg *cfg,
 877                             void (*update)(struct rsnd_dai_stream *io,
 878                                            struct rsnd_mod *mod))
 879 {
 880         struct snd_soc_card *soc_card = rtd->card;
 881         struct snd_card *card = rtd->card->snd_card;
 882         struct snd_kcontrol *kctrl;
 883         struct snd_kcontrol_new knew = {
 884                 .iface          = SNDRV_CTL_ELEM_IFACE_MIXER,
 885                 .name           = name,
 886                 .info           = rsnd_kctrl_info,
 887                 .index          = rtd - soc_card->rtd,
 888                 .get            = rsnd_kctrl_get,
 889                 .put            = rsnd_kctrl_put,
 890                 .private_value  = (unsigned long)cfg,
 891         };
 892         int ret;
 893
 894         kctrl = snd_ctl_new1(&knew, mod);
 895         if (!kctrl)
 896                 return -ENOMEM;
 897
 898         ret = snd_ctl_add(card, kctrl);
 899         if (ret < 0) {
 900                 snd_ctl_free_one(kctrl);
 901                 return ret;
 902         }
 903
 904         cfg->update = update;
 905         cfg->card = card;
 906         cfg->kctrl = kctrl;
 907         cfg->io = io;
 908
 909         return 0;
 910 }
 911
 912 void _rsnd_kctrl_remove(struct rsnd_kctrl_cfg *cfg)
 913 {
 914         snd_ctl_remove(cfg->card, cfg->kctrl);
 915 }
 916
 917 int rsnd_kctrl_new_m(struct rsnd_mod *mod,
 918                      struct rsnd_dai_stream *io,
 919                      struct snd_soc_pcm_runtime *rtd,
 920                      const unsigned char *name,
 921                      void (*update)(struct rsnd_dai_stream *io,
 922                                     struct rsnd_mod *mod),
 923                      struct rsnd_kctrl_cfg_m *_cfg,
 924                      int ch_size,
 925                      u32 max)
 926 {
 927         if (ch_size > RSND_DVC_CHANNELS)
 928                 return -EINVAL;
 929
 930         _cfg->cfg.max   = max;
 931         _cfg->cfg.size  = ch_size;
 932         _cfg->cfg.val   = _cfg->val;
 933         return __rsnd_kctrl_new(mod, io, rtd, name, &_cfg->cfg, update);
 934 }
 935
 936 int rsnd_kctrl_new_s(struct rsnd_mod *mod,
 937                      struct rsnd_dai_stream *io,
 938                      struct snd_soc_pcm_runtime *rtd,
 939                      const unsigned char *name,
 940                      void (*update)(struct rsnd_dai_stream *io,
 941                                     struct rsnd_mod *mod),
 942                      struct rsnd_kctrl_cfg_s *_cfg,
 943                      u32 max)
 944 {
 945         _cfg->cfg.max   = max;
 946         _cfg->cfg.size  = 1;
 947         _cfg->cfg.val   = &_cfg->val;
 948         return __rsnd_kctrl_new(mod, io, rtd, name, &_cfg->cfg, update);
 949 }
 950
 951 int rsnd_kctrl_new_e(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_s *_cfg,
 956                      void (*update)(struct rsnd_dai_stream *io,
 957                                     struct rsnd_mod *mod),
 958                      const char * const *texts,
 959                      u32 max)
 960 {
 961         _cfg->cfg.max   = max;
 962         _cfg->cfg.size  = 1;
 963         _cfg->cfg.val   = &_cfg->val;
 964         _cfg->cfg.texts = texts;
 965         return __rsnd_kctrl_new(mod, io, rtd, name, &_cfg->cfg, update);
 966 }
 967
 968 /*
 969  *              snd_soc_platform
 970  */
 971
 972 #define PREALLOC_BUFFER         (32 * 1024)
 973 #define PREALLOC_BUFFER_MAX     (32 * 1024)
 974
 975 static int rsnd_pcm_new(struct snd_soc_pcm_runtime *rtd)
 976 {
 977         struct snd_soc_dai *dai = rtd->cpu_dai;
 978         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
 979         int ret;
 980
 981         ret = rsnd_dai_call(pcm_new, &rdai->playback, rtd);
 982         if (ret)
 983                 return ret;
 984
 985         ret = rsnd_dai_call(pcm_new, &rdai->capture, rtd);
 986         if (ret)
 987                 return ret;
 988
 989         return snd_pcm_lib_preallocate_pages_for_all(
 990                 rtd->pcm,
 991                 SNDRV_DMA_TYPE_DEV,
 992                 rtd->card->snd_card->dev,
 993                 PREALLOC_BUFFER, PREALLOC_BUFFER_MAX);
 994 }
 995
 996 static struct snd_soc_platform_driver rsnd_soc_platform = {
 997         .ops            = &rsnd_pcm_ops,
 998         .pcm_new        = rsnd_pcm_new,
 999 };
1000
1001 static const struct snd_soc_component_driver rsnd_soc_component = {
1002         .name           = "rsnd",
1003 };
1004
1005 static int rsnd_rdai_continuance_probe(struct rsnd_priv *priv,
1006                                        struct rsnd_dai_stream *io)
1007 {
1008         int ret;
1009
1010         ret = rsnd_dai_call(probe, io, priv);
1011         if (ret == -EAGAIN) {
1012                 struct rsnd_mod *ssi_mod = rsnd_io_to_mod_ssi(io);
1013                 int i;
1014
1015                 /*
1016                  * Fallback to PIO mode
1017                  */
1018
1019                 /*
1020                  * call "remove" for SSI/SRC/DVC
1021                  * SSI will be switch to PIO mode if it was DMA mode
1022                  * see
1023                  *      rsnd_dma_init()
1024                  *      rsnd_ssi_fallback()
1025                  */
1026                 rsnd_dai_call(remove, io, priv);
1027
1028                 /*
1029                  * remove all mod from io
1030                  * and, re connect ssi
1031                  */
1032                 for (i = 0; i < RSND_MOD_MAX; i++)
1033                         rsnd_dai_disconnect((io)->mod[i], io, i);
1034                 rsnd_dai_connect(ssi_mod, io, RSND_MOD_SSI);
1035
1036                 /*
1037                  * fallback
1038                  */
1039                 rsnd_dai_call(fallback, io, priv);
1040
1041                 /*
1042                  * retry to "probe".
1043                  * DAI has SSI which is PIO mode only now.
1044                  */
1045                 ret = rsnd_dai_call(probe, io, priv);
1046         }
1047
1048         return ret;
1049 }
1050
1051 /*
1052  *      rsnd probe
1053  */
1054 static int rsnd_probe(struct platform_device *pdev)
1055 {
1056         struct rsnd_priv *priv;
1057         struct device *dev = &pdev->dev;
1058         struct rsnd_dai *rdai;
1059         const struct of_device_id *of_id = of_match_device(rsnd_of_match, dev);
1060         int (*probe_func[])(struct rsnd_priv *priv) = {
1061                 rsnd_gen_probe,
1062                 rsnd_dma_probe,
1063                 rsnd_ssi_probe,
1064                 rsnd_ssiu_probe,
1065                 rsnd_src_probe,
1066                 rsnd_ctu_probe,
1067                 rsnd_mix_probe,
1068                 rsnd_dvc_probe,
1069                 rsnd_cmd_probe,
1070                 rsnd_adg_probe,
1071                 rsnd_dai_probe,
1072         };
1073         int ret, i;
1074
1075         /*
1076          *      init priv data
1077          */
1078         priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
1079         if (!priv) {
1080                 dev_err(dev, "priv allocate failed\n");
1081                 return -ENODEV;
1082         }
1083
1084         priv->pdev      = pdev;
1085         priv->flags     = (unsigned long)of_id->data;
1086         spin_lock_init(&priv->lock);
1087
1088         /*
1089          *      init each module
1090          */
1091         for (i = 0; i < ARRAY_SIZE(probe_func); i++) {
1092                 ret = probe_func[i](priv);
1093                 if (ret)
1094                         return ret;
1095         }
1096
1097         for_each_rsnd_dai(rdai, priv, i) {
1098                 ret = rsnd_rdai_continuance_probe(priv, &rdai->playback);
1099                 if (ret)
1100                         goto exit_snd_probe;
1101
1102                 ret = rsnd_rdai_continuance_probe(priv, &rdai->capture);
1103                 if (ret)
1104                         goto exit_snd_probe;
1105         }
1106
1107         dev_set_drvdata(dev, priv);
1108
1109         /*
1110          *      asoc register
1111          */
1112         ret = snd_soc_register_platform(dev, &rsnd_soc_platform);
1113         if (ret < 0) {
1114                 dev_err(dev, "cannot snd soc register\n");
1115                 return ret;
1116         }
1117
1118         ret = snd_soc_register_component(dev, &rsnd_soc_component,
1119                                          priv->daidrv, rsnd_rdai_nr(priv));
1120         if (ret < 0) {
1121                 dev_err(dev, "cannot snd dai register\n");
1122                 goto exit_snd_soc;
1123         }
1124
1125         pm_runtime_enable(dev);
1126
1127         dev_info(dev, "probed\n");
1128         return ret;
1129
1130 exit_snd_soc:
1131         snd_soc_unregister_platform(dev);
1132 exit_snd_probe:
1133         for_each_rsnd_dai(rdai, priv, i) {
1134                 rsnd_dai_call(remove, &rdai->playback, priv);
1135                 rsnd_dai_call(remove, &rdai->capture, priv);
1136         }
1137
1138         return ret;
1139 }
1140
1141 static int rsnd_remove(struct platform_device *pdev)
1142 {
1143         struct rsnd_priv *priv = dev_get_drvdata(&pdev->dev);
1144         struct rsnd_dai *rdai;
1145         void (*remove_func[])(struct rsnd_priv *priv) = {
1146                 rsnd_ssi_remove,
1147                 rsnd_ssiu_remove,
1148                 rsnd_src_remove,
1149                 rsnd_ctu_remove,
1150                 rsnd_mix_remove,
1151                 rsnd_dvc_remove,
1152                 rsnd_cmd_remove,
1153                 rsnd_adg_remove,
1154         };
1155         int ret = 0, i;
1156
1157         pm_runtime_disable(&pdev->dev);
1158
1159         for_each_rsnd_dai(rdai, priv, i) {
1160                 ret |= rsnd_dai_call(remove, &rdai->playback, priv);
1161                 ret |= rsnd_dai_call(remove, &rdai->capture, priv);
1162         }
1163
1164         for (i = 0; i < ARRAY_SIZE(remove_func); i++)
1165                 remove_func[i](priv);
1166
1167         snd_soc_unregister_component(&pdev->dev);
1168         snd_soc_unregister_platform(&pdev->dev);
1169
1170         return ret;
1171 }
1172
1173 static struct platform_driver rsnd_driver = {
1174         .driver = {
1175                 .name   = "rcar_sound",
1176                 .of_match_table = rsnd_of_match,
1177         },
1178         .probe          = rsnd_probe,
1179         .remove         = rsnd_remove,
1180 };
1181 module_platform_driver(rsnd_driver);
1182
1183 MODULE_LICENSE("GPL");
1184 MODULE_DESCRIPTION("Renesas R-Car audio driver");
1185 MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");
1186 MODULE_ALIAS("platform:rcar-pcm-audio");