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 <linux/shdma-base.h>
  98 #include "rsnd.h"
  99
 100 #define RSND_RATES SNDRV_PCM_RATE_8000_96000
 101 #define RSND_FMTS (SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S16_LE)
 102
 103 static struct rsnd_of_data rsnd_of_data_gen1 = {
 104         .flags = RSND_GEN1,
 105 };
 106
 107 static struct rsnd_of_data rsnd_of_data_gen2 = {
 108         .flags = RSND_GEN2,
 109 };
 110
 111 static struct of_device_id rsnd_of_match[] = {
 112         { .compatible = "renesas,rcar_sound-gen1", .data = &rsnd_of_data_gen1 },
 113         { .compatible = "renesas,rcar_sound-gen2", .data = &rsnd_of_data_gen2 },
 114         {},
 115 };
 116 MODULE_DEVICE_TABLE(of, rsnd_of_match);
 117
 118 /*
 119  *      rsnd_platform functions
 120  */
 121 #define rsnd_platform_call(priv, dai, func, param...)   \
 122         (!(priv->info->func) ? 0 :              \
 123          priv->info->func(param))
 124
 125 #define rsnd_is_enable_path(io, name) \
 126         ((io)->info ? (io)->info->name : NULL)
 127 #define rsnd_info_id(priv, io, name) \
 128         ((io)->info->name - priv->info->name##_info)
 129
 130 /*
 131  *      rsnd_mod functions
 132  */
 133 char *rsnd_mod_name(struct rsnd_mod *mod)
 134 {
 135         if (!mod || !mod->ops)
 136                 return "unknown";
 137
 138         return mod->ops->name;
 139 }
 140
 141 void rsnd_mod_init(struct rsnd_priv *priv,
 142                    struct rsnd_mod *mod,
 143                    struct rsnd_mod_ops *ops,
 144                    enum rsnd_mod_type type,
 145                    int id)
 146 {
 147         mod->priv       = priv;
 148         mod->id         = id;
 149         mod->ops        = ops;
 150         mod->type       = type;
 151 }
 152
 153 /*
 154  *      rsnd_dma functions
 155  */
 156 static void __rsnd_dma_start(struct rsnd_dma *dma);
 157 static void rsnd_dma_continue(struct rsnd_dma *dma)
 158 {
 159         /* push next A or B plane */
 160         dma->submit_loop = 1;
 161         schedule_work(&dma->work);
 162 }
 163
 164 void rsnd_dma_start(struct rsnd_dma *dma)
 165 {
 166         /* push both A and B plane*/
 167         dma->offset = 0;
 168         dma->submit_loop = 2;
 169         __rsnd_dma_start(dma);
 170 }
 171
 172 void rsnd_dma_stop(struct rsnd_dma *dma)
 173 {
 174         dma->submit_loop = 0;
 175         cancel_work_sync(&dma->work);
 176         dmaengine_terminate_all(dma->chan);
 177 }
 178
 179 static void rsnd_dma_complete(void *data)
 180 {
 181         struct rsnd_dma *dma = (struct rsnd_dma *)data;
 182         struct rsnd_mod *mod = rsnd_dma_to_mod(dma);
 183         struct rsnd_priv *priv = rsnd_mod_to_priv(rsnd_dma_to_mod(dma));
 184         struct rsnd_dai_stream *io = rsnd_mod_to_io(mod);
 185         unsigned long flags;
 186
 187         rsnd_lock(priv, flags);
 188
 189         /*
 190          * Renesas sound Gen1 needs 1 DMAC,
 191          * Gen2 needs 2 DMAC.
 192          * In Gen2 case, it are Audio-DMAC, and Audio-DMAC-peri-peri.
 193          * But, Audio-DMAC-peri-peri doesn't have interrupt,
 194          * and this driver is assuming that here.
 195          *
 196          * If Audio-DMAC-peri-peri has interrpt,
 197          * rsnd_dai_pointer_update() will be called twice,
 198          * ant it will breaks io->byte_pos
 199          */
 200         if (dma->submit_loop)
 201                 rsnd_dma_continue(dma);
 202
 203         rsnd_unlock(priv, flags);
 204
 205         rsnd_dai_pointer_update(io, io->byte_per_period);
 206 }
 207
 208 static void __rsnd_dma_start(struct rsnd_dma *dma)
 209 {
 210         struct rsnd_mod *mod = rsnd_dma_to_mod(dma);
 211         struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
 212         struct rsnd_dai_stream *io = rsnd_mod_to_io(mod);
 213         struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
 214         struct device *dev = rsnd_priv_to_dev(priv);
 215         struct dma_async_tx_descriptor *desc;
 216         dma_addr_t buf;
 217         size_t len = io->byte_per_period;
 218         int i;
 219
 220         for (i = 0; i < dma->submit_loop; i++) {
 221
 222                 buf = runtime->dma_addr +
 223                         rsnd_dai_pointer_offset(io, dma->offset + len);
 224                 dma->offset = len;
 225
 226                 desc = dmaengine_prep_slave_single(
 227                         dma->chan, buf, len, dma->dir,
 228                         DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
 229                 if (!desc) {
 230                         dev_err(dev, "dmaengine_prep_slave_sg() fail\n");
 231                         return;
 232                 }
 233
 234                 desc->callback          = rsnd_dma_complete;
 235                 desc->callback_param    = dma;
 236
 237                 if (dmaengine_submit(desc) < 0) {
 238                         dev_err(dev, "dmaengine_submit() fail\n");
 239                         return;
 240                 }
 241
 242                 dma_async_issue_pending(dma->chan);
 243         }
 244 }
 245
 246 static void rsnd_dma_do_work(struct work_struct *work)
 247 {
 248         struct rsnd_dma *dma = container_of(work, struct rsnd_dma, work);
 249
 250         __rsnd_dma_start(dma);
 251 }
 252
 253 int rsnd_dma_available(struct rsnd_dma *dma)
 254 {
 255         return !!dma->chan;
 256 }
 257
 258 #define DMA_NAME_SIZE 16
 259 #define MOD_MAX 4 /* MEM/SSI/SRC/DVC */
 260 static int _rsnd_dma_of_name(char *dma_name, struct rsnd_mod *mod)
 261 {
 262         if (mod)
 263                 return snprintf(dma_name, DMA_NAME_SIZE / 2, "%s%d",
 264                          rsnd_mod_name(mod), rsnd_mod_id(mod));
 265         else
 266                 return snprintf(dma_name, DMA_NAME_SIZE / 2, "mem");
 267
 268 }
 269
 270 static void rsnd_dma_of_name(struct rsnd_dma *dma,
 271                              int is_play, char *dma_name)
 272 {
 273         struct rsnd_mod *this = rsnd_dma_to_mod(dma);
 274         struct rsnd_dai_stream *io = rsnd_mod_to_io(this);
 275         struct rsnd_mod *ssi = rsnd_io_to_mod_ssi(io);
 276         struct rsnd_mod *src = rsnd_io_to_mod_src(io);
 277         struct rsnd_mod *dvc = rsnd_io_to_mod_dvc(io);
 278         struct rsnd_mod *mod[MOD_MAX];
 279         struct rsnd_mod *src_mod, *dst_mod;
 280         int i, index;
 281
 282
 283         for (i = 0; i < MOD_MAX; i++)
 284                 mod[i] = NULL;
 285
 286         /*
 287          * in play case...
 288          *
 289          * src -> dst
 290          *
 291          * mem -> SSI
 292          * mem -> SRC -> SSI
 293          * mem -> SRC -> DVC -> SSI
 294          */
 295         mod[0] = NULL; /* for "mem" */
 296         index = 1;
 297         for (i = 1; i < MOD_MAX; i++) {
 298                 if (!src) {
 299                         mod[i] = ssi;
 300                         break;
 301                 } else if (!dvc) {
 302                         mod[i] = src;
 303                         src = NULL;
 304                 } else {
 305                         mod[i] = dvc;
 306                         dvc = NULL;
 307                 }
 308
 309                 if (mod[i] == this)
 310                         index = i;
 311         }
 312
 313         if (is_play) {
 314                 src_mod = mod[index - 1];
 315                 dst_mod = mod[index];
 316         } else {
 317                 src_mod = mod[index];
 318                 dst_mod = mod[index + 1];
 319         }
 320
 321         index = 0;
 322         index = _rsnd_dma_of_name(dma_name + index, src_mod);
 323         *(dma_name + index++) = '_';
 324         index = _rsnd_dma_of_name(dma_name + index, dst_mod);
 325 }
 326
 327 int rsnd_dma_init(struct rsnd_priv *priv, struct rsnd_dma *dma,
 328                   int is_play, int id)
 329 {
 330         struct device *dev = rsnd_priv_to_dev(priv);
 331         struct dma_slave_config cfg;
 332         char dma_name[DMA_NAME_SIZE];
 333         dma_cap_mask_t mask;
 334         int ret;
 335
 336         if (dma->chan) {
 337                 dev_err(dev, "it already has dma channel\n");
 338                 return -EIO;
 339         }
 340
 341         dma_cap_zero(mask);
 342         dma_cap_set(DMA_SLAVE, mask);
 343
 344         if (dev->of_node)
 345                 rsnd_dma_of_name(dma, is_play, dma_name);
 346         else
 347                 snprintf(dma_name, DMA_NAME_SIZE,
 348                          is_play ? "tx" : "rx");
 349
 350         dev_dbg(dev, "dma name : %s\n", dma_name);
 351
 352         dma->chan = dma_request_slave_channel_compat(mask, shdma_chan_filter,
 353                                                      (void *)id, dev,
 354                                                      dma_name);
 355         if (!dma->chan) {
 356                 dev_err(dev, "can't get dma channel\n");
 357                 return -EIO;
 358         }
 359
 360         rsnd_gen_dma_addr(priv, dma, &cfg, is_play, id);
 361
 362         ret = dmaengine_slave_config(dma->chan, &cfg);
 363         if (ret < 0)
 364                 goto rsnd_dma_init_err;
 365
 366         dma->dir = is_play ? DMA_TO_DEVICE : DMA_FROM_DEVICE;
 367         INIT_WORK(&dma->work, rsnd_dma_do_work);
 368
 369         return 0;
 370
 371 rsnd_dma_init_err:
 372         rsnd_dma_quit(priv, dma);
 373
 374         return ret;
 375 }
 376
 377 void  rsnd_dma_quit(struct rsnd_priv *priv,
 378                     struct rsnd_dma *dma)
 379 {
 380         if (dma->chan)
 381                 dma_release_channel(dma->chan);
 382
 383         dma->chan = NULL;
 384 }
 385
 386 /*
 387  *      settting function
 388  */
 389 u32 rsnd_get_adinr(struct rsnd_mod *mod)
 390 {
 391         struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
 392         struct rsnd_dai_stream *io = rsnd_mod_to_io(mod);
 393         struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
 394         struct device *dev = rsnd_priv_to_dev(priv);
 395         u32 adinr = runtime->channels;
 396
 397         switch (runtime->sample_bits) {
 398         case 16:
 399                 adinr |= (8 << 16);
 400                 break;
 401         case 32:
 402                 adinr |= (0 << 16);
 403                 break;
 404         default:
 405                 dev_warn(dev, "not supported sample bits\n");
 406                 return 0;
 407         }
 408
 409         return adinr;
 410 }
 411
 412 /*
 413  *      rsnd_dai functions
 414  */
 415 #define __rsnd_mod_call(mod, func, rdai...)                     \
 416 ({                                                              \
 417         struct rsnd_priv *priv = rsnd_mod_to_priv(mod);         \
 418         struct device *dev = rsnd_priv_to_dev(priv);            \
 419         dev_dbg(dev, "%s [%d] %s\n",                            \
 420                 rsnd_mod_name(mod), rsnd_mod_id(mod), #func);   \
 421         (mod)->ops->func(mod, rdai);                            \
 422 })
 423
 424 #define rsnd_mod_call(mod, func, rdai...)       \
 425         (!(mod) ? -ENODEV :                     \
 426          !((mod)->ops->func) ? 0 :              \
 427          __rsnd_mod_call(mod, func, rdai))
 428
 429 #define rsnd_dai_call(fn, io, rdai...)                          \
 430 ({                                                              \
 431         struct rsnd_mod *mod;                                   \
 432         int ret = 0, i;                                         \
 433         for (i = 0; i < RSND_MOD_MAX; i++) {                    \
 434                 mod = (io)->mod[i];                             \
 435                 if (!mod)                                       \
 436                         continue;                               \
 437                 ret = rsnd_mod_call(mod, fn, rdai);             \
 438                 if (ret < 0)                                    \
 439                         break;                                  \
 440         }                                                       \
 441         ret;                                                    \
 442 })
 443
 444 static int rsnd_dai_connect(struct rsnd_mod *mod,
 445                             struct rsnd_dai_stream *io)
 446 {
 447         if (!mod)
 448                 return -EIO;
 449
 450         if (io->mod[mod->type]) {
 451                 struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
 452                 struct device *dev = rsnd_priv_to_dev(priv);
 453
 454                 dev_err(dev, "%s%d is not empty\n",
 455                         rsnd_mod_name(mod),
 456                         rsnd_mod_id(mod));
 457                 return -EIO;
 458         }
 459
 460         io->mod[mod->type] = mod;
 461         mod->io = io;
 462
 463         return 0;
 464 }
 465
 466 int rsnd_dai_id(struct rsnd_priv *priv, struct rsnd_dai *rdai)
 467 {
 468         int id = rdai - priv->rdai;
 469
 470         if ((id < 0) || (id >= rsnd_rdai_nr(priv)))
 471                 return -EINVAL;
 472
 473         return id;
 474 }
 475
 476 struct rsnd_dai *rsnd_dai_get(struct rsnd_priv *priv, int id)
 477 {
 478         if ((id < 0) || (id >= rsnd_rdai_nr(priv)))
 479                 return NULL;
 480
 481         return priv->rdai + id;
 482 }
 483
 484 static struct rsnd_dai *rsnd_dai_to_rdai(struct snd_soc_dai *dai)
 485 {
 486         struct rsnd_priv *priv = snd_soc_dai_get_drvdata(dai);
 487
 488         return rsnd_dai_get(priv, dai->id);
 489 }
 490
 491 int rsnd_dai_is_play(struct rsnd_dai *rdai, struct rsnd_dai_stream *io)
 492 {
 493         return &rdai->playback == io;
 494 }
 495
 496 /*
 497  *      rsnd_soc_dai functions
 498  */
 499 int rsnd_dai_pointer_offset(struct rsnd_dai_stream *io, int additional)
 500 {
 501         struct snd_pcm_substream *substream = io->substream;
 502         struct snd_pcm_runtime *runtime = substream->runtime;
 503         int pos = io->byte_pos + additional;
 504
 505         pos %= (runtime->periods * io->byte_per_period);
 506
 507         return pos;
 508 }
 509
 510 void rsnd_dai_pointer_update(struct rsnd_dai_stream *io, int byte)
 511 {
 512         io->byte_pos += byte;
 513
 514         if (io->byte_pos >= io->next_period_byte) {
 515                 struct snd_pcm_substream *substream = io->substream;
 516                 struct snd_pcm_runtime *runtime = substream->runtime;
 517
 518                 io->period_pos++;
 519                 io->next_period_byte += io->byte_per_period;
 520
 521                 if (io->period_pos >= runtime->periods) {
 522                         io->byte_pos = 0;
 523                         io->period_pos = 0;
 524                         io->next_period_byte = io->byte_per_period;
 525                 }
 526
 527                 snd_pcm_period_elapsed(substream);
 528         }
 529 }
 530
 531 static int rsnd_dai_stream_init(struct rsnd_dai_stream *io,
 532                                 struct snd_pcm_substream *substream)
 533 {
 534         struct snd_pcm_runtime *runtime = substream->runtime;
 535
 536         io->substream           = substream;
 537         io->byte_pos            = 0;
 538         io->period_pos          = 0;
 539         io->byte_per_period     = runtime->period_size *
 540                                   runtime->channels *
 541                                   samples_to_bytes(runtime, 1);
 542         io->next_period_byte    = io->byte_per_period;
 543
 544         return 0;
 545 }
 546
 547 static
 548 struct snd_soc_dai *rsnd_substream_to_dai(struct snd_pcm_substream *substream)
 549 {
 550         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 551
 552         return  rtd->cpu_dai;
 553 }
 554
 555 static
 556 struct rsnd_dai_stream *rsnd_rdai_to_io(struct rsnd_dai *rdai,
 557                                         struct snd_pcm_substream *substream)
 558 {
 559         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 560                 return &rdai->playback;
 561         else
 562                 return &rdai->capture;
 563 }
 564
 565 static int rsnd_soc_dai_trigger(struct snd_pcm_substream *substream, int cmd,
 566                             struct snd_soc_dai *dai)
 567 {
 568         struct rsnd_priv *priv = snd_soc_dai_get_drvdata(dai);
 569         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
 570         struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream);
 571         int ssi_id = rsnd_mod_id(rsnd_io_to_mod_ssi(io));
 572         int ret;
 573         unsigned long flags;
 574
 575         rsnd_lock(priv, flags);
 576
 577         switch (cmd) {
 578         case SNDRV_PCM_TRIGGER_START:
 579                 ret = rsnd_dai_stream_init(io, substream);
 580                 if (ret < 0)
 581                         goto dai_trigger_end;
 582
 583                 ret = rsnd_platform_call(priv, dai, start, ssi_id);
 584                 if (ret < 0)
 585                         goto dai_trigger_end;
 586
 587                 ret = rsnd_dai_call(init, io, rdai);
 588                 if (ret < 0)
 589                         goto dai_trigger_end;
 590
 591                 ret = rsnd_dai_call(start, io, rdai);
 592                 if (ret < 0)
 593                         goto dai_trigger_end;
 594                 break;
 595         case SNDRV_PCM_TRIGGER_STOP:
 596                 ret = rsnd_dai_call(stop, io, rdai);
 597                 if (ret < 0)
 598                         goto dai_trigger_end;
 599
 600                 ret = rsnd_dai_call(quit, io, rdai);
 601                 if (ret < 0)
 602                         goto dai_trigger_end;
 603
 604                 ret = rsnd_platform_call(priv, dai, stop, ssi_id);
 605                 if (ret < 0)
 606                         goto dai_trigger_end;
 607                 break;
 608         default:
 609                 ret = -EINVAL;
 610         }
 611
 612 dai_trigger_end:
 613         rsnd_unlock(priv, flags);
 614
 615         return ret;
 616 }
 617
 618 static int rsnd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
 619 {
 620         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
 621
 622         /* set master/slave audio interface */
 623         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 624         case SND_SOC_DAIFMT_CBM_CFM:
 625                 rdai->clk_master = 0;
 626                 break;
 627         case SND_SOC_DAIFMT_CBS_CFS:
 628                 rdai->clk_master = 1; /* codec is slave, cpu is master */
 629                 break;
 630         default:
 631                 return -EINVAL;
 632         }
 633
 634         /* set clock inversion */
 635         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
 636         case SND_SOC_DAIFMT_NB_IF:
 637                 rdai->bit_clk_inv = 0;
 638                 rdai->frm_clk_inv = 1;
 639                 break;
 640         case SND_SOC_DAIFMT_IB_NF:
 641                 rdai->bit_clk_inv = 1;
 642                 rdai->frm_clk_inv = 0;
 643                 break;
 644         case SND_SOC_DAIFMT_IB_IF:
 645                 rdai->bit_clk_inv = 1;
 646                 rdai->frm_clk_inv = 1;
 647                 break;
 648         case SND_SOC_DAIFMT_NB_NF:
 649         default:
 650                 rdai->bit_clk_inv = 0;
 651                 rdai->frm_clk_inv = 0;
 652                 break;
 653         }
 654
 655         /* set format */
 656         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 657         case SND_SOC_DAIFMT_I2S:
 658                 rdai->sys_delay = 0;
 659                 rdai->data_alignment = 0;
 660                 break;
 661         case SND_SOC_DAIFMT_LEFT_J:
 662                 rdai->sys_delay = 1;
 663                 rdai->data_alignment = 0;
 664                 break;
 665         case SND_SOC_DAIFMT_RIGHT_J:
 666                 rdai->sys_delay = 1;
 667                 rdai->data_alignment = 1;
 668                 break;
 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 };
 678
 679 #define rsnd_path_parse(priv, io, type)                         \
 680 ({                                                              \
 681         struct rsnd_mod *mod;                                   \
 682         int ret = 0;                                            \
 683         int id = -1;                                            \
 684                                                                 \
 685         if (rsnd_is_enable_path(io, type)) {                    \
 686                 id = rsnd_info_id(priv, io, type);              \
 687                 if (id >= 0) {                                  \
 688                         mod = rsnd_##type##_mod_get(priv, id);  \
 689                         ret = rsnd_dai_connect(mod, io);        \
 690                 }                                               \
 691         }                                                       \
 692         ret;                                                    \
 693 })
 694
 695 static int rsnd_path_init(struct rsnd_priv *priv,
 696                           struct rsnd_dai *rdai,
 697                           struct rsnd_dai_stream *io)
 698 {
 699         int ret;
 700
 701         /*
 702          * Gen1 is created by SRU/SSI, and this SRU is base module of
 703          * Gen2's SCU/SSIU/SSI. (Gen2 SCU/SSIU came from SRU)
 704          *
 705          * Easy image is..
 706          *      Gen1 SRU = Gen2 SCU + SSIU + etc
 707          *
 708          * Gen2 SCU path is very flexible, but, Gen1 SRU (SCU parts) is
 709          * using fixed path.
 710          */
 711
 712         /* SRC */
 713         ret = rsnd_path_parse(priv, io, src);
 714         if (ret < 0)
 715                 return ret;
 716
 717         /* SSI */
 718         ret = rsnd_path_parse(priv, io, ssi);
 719         if (ret < 0)
 720                 return ret;
 721
 722         /* DVC */
 723         ret = rsnd_path_parse(priv, io, dvc);
 724         if (ret < 0)
 725                 return ret;
 726
 727         return ret;
 728 }
 729
 730 static void rsnd_of_parse_dai(struct platform_device *pdev,
 731                               const struct rsnd_of_data *of_data,
 732                               struct rsnd_priv *priv)
 733 {
 734         struct device_node *dai_node,   *dai_np;
 735         struct device_node *ssi_node,   *ssi_np;
 736         struct device_node *src_node,   *src_np;
 737         struct device_node *playback, *capture;
 738         struct rsnd_dai_platform_info *dai_info;
 739         struct rcar_snd_info *info = rsnd_priv_to_info(priv);
 740         struct device *dev = &pdev->dev;
 741         int nr, i;
 742         int dai_i, ssi_i, src_i;
 743
 744         if (!of_data)
 745                 return;
 746
 747         dai_node = of_get_child_by_name(dev->of_node, "rcar_sound,dai");
 748         if (!dai_node)
 749                 return;
 750
 751         nr = of_get_child_count(dai_node);
 752         if (!nr)
 753                 return;
 754
 755         dai_info = devm_kzalloc(dev,
 756                                 sizeof(struct rsnd_dai_platform_info) * nr,
 757                                 GFP_KERNEL);
 758         if (!dai_info) {
 759                 dev_err(dev, "dai info allocation error\n");
 760                 return;
 761         }
 762
 763         info->dai_info_nr       = nr;
 764         info->dai_info          = dai_info;
 765
 766         ssi_node = of_get_child_by_name(dev->of_node, "rcar_sound,ssi");
 767         src_node = of_get_child_by_name(dev->of_node, "rcar_sound,src");
 768
 769 #define mod_parse(name)                                                 \
 770 if (name##_node) {                                                      \
 771         struct rsnd_##name##_platform_info *name##_info;                \
 772                                                                         \
 773         name##_i = 0;                                                   \
 774         for_each_child_of_node(name##_node, name##_np) {                \
 775                 name##_info = info->name##_info + name##_i;             \
 776                                                                         \
 777                 if (name##_np == playback)                              \
 778                         dai_info->playback.name = name##_info;          \
 779                 if (name##_np == capture)                               \
 780                         dai_info->capture.name = name##_info;           \
 781                                                                         \
 782                 name##_i++;                                             \
 783         }                                                               \
 784 }
 785
 786         /*
 787          * parse all dai
 788          */
 789         dai_i = 0;
 790         for_each_child_of_node(dai_node, dai_np) {
 791                 dai_info = info->dai_info + dai_i;
 792
 793                 for (i = 0;; i++) {
 794
 795                         playback = of_parse_phandle(dai_np, "playback", i);
 796                         capture  = of_parse_phandle(dai_np, "capture", i);
 797
 798                         if (!playback && !capture)
 799                                 break;
 800
 801                         mod_parse(ssi);
 802                         mod_parse(src);
 803
 804                         if (playback)
 805                                 of_node_put(playback);
 806                         if (capture)
 807                                 of_node_put(capture);
 808                 }
 809
 810                 dai_i++;
 811         }
 812 }
 813
 814 static int rsnd_dai_probe(struct platform_device *pdev,
 815                           const struct rsnd_of_data *of_data,
 816                           struct rsnd_priv *priv)
 817 {
 818         struct snd_soc_dai_driver *drv;
 819         struct rcar_snd_info *info = rsnd_priv_to_info(priv);
 820         struct rsnd_dai *rdai;
 821         struct rsnd_ssi_platform_info *pmod, *cmod;
 822         struct device *dev = rsnd_priv_to_dev(priv);
 823         int dai_nr;
 824         int i;
 825
 826         rsnd_of_parse_dai(pdev, of_data, priv);
 827
 828         dai_nr = info->dai_info_nr;
 829         if (!dai_nr) {
 830                 dev_err(dev, "no dai\n");
 831                 return -EIO;
 832         }
 833
 834         drv  = devm_kzalloc(dev, sizeof(*drv)  * dai_nr, GFP_KERNEL);
 835         rdai = devm_kzalloc(dev, sizeof(*rdai) * dai_nr, GFP_KERNEL);
 836         if (!drv || !rdai) {
 837                 dev_err(dev, "dai allocate failed\n");
 838                 return -ENOMEM;
 839         }
 840
 841         priv->rdai_nr   = dai_nr;
 842         priv->daidrv    = drv;
 843         priv->rdai      = rdai;
 844
 845         for (i = 0; i < dai_nr; i++) {
 846                 rdai[i].info = &info->dai_info[i];
 847
 848                 pmod = rdai[i].info->playback.ssi;
 849                 cmod = rdai[i].info->capture.ssi;
 850
 851                 /*
 852                  *      init rsnd_dai
 853                  */
 854                 snprintf(rdai[i].name, RSND_DAI_NAME_SIZE, "rsnd-dai.%d", i);
 855
 856                 /*
 857                  *      init snd_soc_dai_driver
 858                  */
 859                 drv[i].name     = rdai[i].name;
 860                 drv[i].ops      = &rsnd_soc_dai_ops;
 861                 if (pmod) {
 862                         drv[i].playback.rates           = RSND_RATES;
 863                         drv[i].playback.formats         = RSND_FMTS;
 864                         drv[i].playback.channels_min    = 2;
 865                         drv[i].playback.channels_max    = 2;
 866
 867                         rdai[i].playback.info = &info->dai_info[i].playback;
 868                         rsnd_path_init(priv, &rdai[i], &rdai[i].playback);
 869                 }
 870                 if (cmod) {
 871                         drv[i].capture.rates            = RSND_RATES;
 872                         drv[i].capture.formats          = RSND_FMTS;
 873                         drv[i].capture.channels_min     = 2;
 874                         drv[i].capture.channels_max     = 2;
 875
 876                         rdai[i].capture.info = &info->dai_info[i].capture;
 877                         rsnd_path_init(priv, &rdai[i], &rdai[i].capture);
 878                 }
 879
 880                 dev_dbg(dev, "%s (%s/%s)\n", rdai[i].name,
 881                         pmod ? "play"    : " -- ",
 882                         cmod ? "capture" : "  --   ");
 883         }
 884
 885         return 0;
 886 }
 887
 888 /*
 889  *              pcm ops
 890  */
 891 static struct snd_pcm_hardware rsnd_pcm_hardware = {
 892         .info =         SNDRV_PCM_INFO_INTERLEAVED      |
 893                         SNDRV_PCM_INFO_MMAP             |
 894                         SNDRV_PCM_INFO_MMAP_VALID       |
 895                         SNDRV_PCM_INFO_PAUSE,
 896         .buffer_bytes_max       = 64 * 1024,
 897         .period_bytes_min       = 32,
 898         .period_bytes_max       = 8192,
 899         .periods_min            = 1,
 900         .periods_max            = 32,
 901         .fifo_size              = 256,
 902 };
 903
 904 static int rsnd_pcm_open(struct snd_pcm_substream *substream)
 905 {
 906         struct snd_pcm_runtime *runtime = substream->runtime;
 907         int ret = 0;
 908
 909         snd_soc_set_runtime_hwparams(substream, &rsnd_pcm_hardware);
 910
 911         ret = snd_pcm_hw_constraint_integer(runtime,
 912                                             SNDRV_PCM_HW_PARAM_PERIODS);
 913
 914         return ret;
 915 }
 916
 917 static int rsnd_hw_params(struct snd_pcm_substream *substream,
 918                          struct snd_pcm_hw_params *hw_params)
 919 {
 920         return snd_pcm_lib_malloc_pages(substream,
 921                                         params_buffer_bytes(hw_params));
 922 }
 923
 924 static snd_pcm_uframes_t rsnd_pointer(struct snd_pcm_substream *substream)
 925 {
 926         struct snd_pcm_runtime *runtime = substream->runtime;
 927         struct snd_soc_dai *dai = rsnd_substream_to_dai(substream);
 928         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
 929         struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream);
 930
 931         return bytes_to_frames(runtime, io->byte_pos);
 932 }
 933
 934 static struct snd_pcm_ops rsnd_pcm_ops = {
 935         .open           = rsnd_pcm_open,
 936         .ioctl          = snd_pcm_lib_ioctl,
 937         .hw_params      = rsnd_hw_params,
 938         .hw_free        = snd_pcm_lib_free_pages,
 939         .pointer        = rsnd_pointer,
 940 };
 941
 942 /*
 943  *              snd_soc_platform
 944  */
 945
 946 #define PREALLOC_BUFFER         (32 * 1024)
 947 #define PREALLOC_BUFFER_MAX     (32 * 1024)
 948
 949 static int rsnd_pcm_new(struct snd_soc_pcm_runtime *rtd)
 950 {
 951         struct rsnd_priv *priv = snd_soc_dai_get_drvdata(rtd->cpu_dai);
 952         struct rsnd_dai *rdai;
 953         int i, ret;
 954
 955         for_each_rsnd_dai(rdai, priv, i) {
 956                 ret = rsnd_dai_call(pcm_new, &rdai->playback, rdai, rtd);
 957                 if (ret)
 958                         return ret;
 959
 960                 ret = rsnd_dai_call(pcm_new, &rdai->capture, rdai, rtd);
 961                 if (ret)
 962                         return ret;
 963         }
 964
 965         return snd_pcm_lib_preallocate_pages_for_all(
 966                 rtd->pcm,
 967                 SNDRV_DMA_TYPE_DEV,
 968                 rtd->card->snd_card->dev,
 969                 PREALLOC_BUFFER, PREALLOC_BUFFER_MAX);
 970 }
 971
 972 static void rsnd_pcm_free(struct snd_pcm *pcm)
 973 {
 974         snd_pcm_lib_preallocate_free_for_all(pcm);
 975 }
 976
 977 static struct snd_soc_platform_driver rsnd_soc_platform = {
 978         .ops            = &rsnd_pcm_ops,
 979         .pcm_new        = rsnd_pcm_new,
 980         .pcm_free       = rsnd_pcm_free,
 981 };
 982
 983 static const struct snd_soc_component_driver rsnd_soc_component = {
 984         .name           = "rsnd",
 985 };
 986
 987 /*
 988  *      rsnd probe
 989  */
 990 static int rsnd_probe(struct platform_device *pdev)
 991 {
 992         struct rcar_snd_info *info;
 993         struct rsnd_priv *priv;
 994         struct device *dev = &pdev->dev;
 995         struct rsnd_dai *rdai;
 996         const struct of_device_id *of_id = of_match_device(rsnd_of_match, dev);
 997         const struct rsnd_of_data *of_data;
 998         int (*probe_func[])(struct platform_device *pdev,
 999                             const struct rsnd_of_data *of_data,
1000                             struct rsnd_priv *priv) = {
1001                 rsnd_gen_probe,
1002                 rsnd_ssi_probe,
1003                 rsnd_src_probe,
1004                 rsnd_dvc_probe,
1005                 rsnd_adg_probe,
1006                 rsnd_dai_probe,
1007         };
1008         int ret, i;
1009
1010         info = NULL;
1011         of_data = NULL;
1012         if (of_id) {
1013                 info = devm_kzalloc(&pdev->dev,
1014                                     sizeof(struct rcar_snd_info), GFP_KERNEL);
1015                 of_data = of_id->data;
1016         } else {
1017                 info = pdev->dev.platform_data;
1018         }
1019
1020         if (!info) {
1021                 dev_err(dev, "driver needs R-Car sound information\n");
1022                 return -ENODEV;
1023         }
1024
1025         /*
1026          *      init priv data
1027          */
1028         priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
1029         if (!priv) {
1030                 dev_err(dev, "priv allocate failed\n");
1031                 return -ENODEV;
1032         }
1033
1034         priv->pdev      = pdev;
1035         priv->info      = info;
1036         spin_lock_init(&priv->lock);
1037
1038         /*
1039          *      init each module
1040          */
1041         for (i = 0; i < ARRAY_SIZE(probe_func); i++) {
1042                 ret = probe_func[i](pdev, of_data, priv);
1043                 if (ret)
1044                         return ret;
1045         }
1046
1047         for_each_rsnd_dai(rdai, priv, i) {
1048                 ret = rsnd_dai_call(probe, &rdai->playback, rdai);
1049                 if (ret)
1050                         return ret;
1051
1052                 ret = rsnd_dai_call(probe, &rdai->capture, rdai);
1053                 if (ret)
1054                         return ret;
1055         }
1056
1057         /*
1058          *      asoc register
1059          */
1060         ret = snd_soc_register_platform(dev, &rsnd_soc_platform);
1061         if (ret < 0) {
1062                 dev_err(dev, "cannot snd soc register\n");
1063                 return ret;
1064         }
1065
1066         ret = snd_soc_register_component(dev, &rsnd_soc_component,
1067                                          priv->daidrv, rsnd_rdai_nr(priv));
1068         if (ret < 0) {
1069                 dev_err(dev, "cannot snd dai register\n");
1070                 goto exit_snd_soc;
1071         }
1072
1073         dev_set_drvdata(dev, priv);
1074
1075         pm_runtime_enable(dev);
1076
1077         dev_info(dev, "probed\n");
1078         return ret;
1079
1080 exit_snd_soc:
1081         snd_soc_unregister_platform(dev);
1082
1083         return ret;
1084 }
1085
1086 static int rsnd_remove(struct platform_device *pdev)
1087 {
1088         struct rsnd_priv *priv = dev_get_drvdata(&pdev->dev);
1089         struct rsnd_dai *rdai;
1090         int ret, i;
1091
1092         pm_runtime_disable(&pdev->dev);
1093
1094         for_each_rsnd_dai(rdai, priv, i) {
1095                 ret = rsnd_dai_call(remove, &rdai->playback, rdai);
1096                 if (ret)
1097                         return ret;
1098
1099                 ret = rsnd_dai_call(remove, &rdai->capture, rdai);
1100                 if (ret)
1101                         return ret;
1102         }
1103
1104         return 0;
1105 }
1106
1107 static struct platform_driver rsnd_driver = {
1108         .driver = {
1109                 .name   = "rcar_sound",
1110                 .of_match_table = rsnd_of_match,
1111         },
1112         .probe          = rsnd_probe,
1113         .remove         = rsnd_remove,
1114 };
1115 module_platform_driver(rsnd_driver);
1116
1117 MODULE_LICENSE("GPL");
1118 MODULE_DESCRIPTION("Renesas R-Car audio driver");
1119 MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");
1120 MODULE_ALIAS("platform:rcar-pcm-audio");