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 char *rsnd_mod_dma_name(struct rsnd_mod *mod)
 142 {
 143         if (!mod || !mod->ops)
 144                 return "unknown";
 145
 146         if (!mod->ops->dma_name)
 147                 return mod->ops->name;
 148
 149         return mod->ops->dma_name(mod);
 150 }
 151
 152 void rsnd_mod_init(struct rsnd_priv *priv,
 153                    struct rsnd_mod *mod,
 154                    struct rsnd_mod_ops *ops,
 155                    enum rsnd_mod_type type,
 156                    int id)
 157 {
 158         mod->priv       = priv;
 159         mod->id         = id;
 160         mod->ops        = ops;
 161         mod->type       = type;
 162 }
 163
 164 /*
 165  *      rsnd_dma functions
 166  */
 167 void rsnd_dma_stop(struct rsnd_dma *dma)
 168 {
 169         dmaengine_terminate_all(dma->chan);
 170 }
 171
 172 static void rsnd_dma_complete(void *data)
 173 {
 174         struct rsnd_dma *dma = (struct rsnd_dma *)data;
 175         struct rsnd_mod *mod = rsnd_dma_to_mod(dma);
 176         struct rsnd_dai_stream *io = rsnd_mod_to_io(mod);
 177
 178         /*
 179          * Renesas sound Gen1 needs 1 DMAC,
 180          * Gen2 needs 2 DMAC.
 181          * In Gen2 case, it are Audio-DMAC, and Audio-DMAC-peri-peri.
 182          * But, Audio-DMAC-peri-peri doesn't have interrupt,
 183          * and this driver is assuming that here.
 184          *
 185          * If Audio-DMAC-peri-peri has interrpt,
 186          * rsnd_dai_pointer_update() will be called twice,
 187          * ant it will breaks io->byte_pos
 188          */
 189
 190         rsnd_dai_pointer_update(io, io->byte_per_period);
 191 }
 192
 193 void rsnd_dma_start(struct rsnd_dma *dma)
 194 {
 195         struct rsnd_mod *mod = rsnd_dma_to_mod(dma);
 196         struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
 197         struct rsnd_dai_stream *io = rsnd_mod_to_io(mod);
 198         struct snd_pcm_substream *substream = io->substream;
 199         struct device *dev = rsnd_priv_to_dev(priv);
 200         struct dma_async_tx_descriptor *desc;
 201
 202         desc = dmaengine_prep_dma_cyclic(dma->chan,
 203                                          substream->runtime->dma_addr,
 204                                          snd_pcm_lib_buffer_bytes(substream),
 205                                          snd_pcm_lib_period_bytes(substream),
 206                                          dma->dir,
 207                                          DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
 208
 209         if (!desc) {
 210                 dev_err(dev, "dmaengine_prep_slave_sg() fail\n");
 211                 return;
 212         }
 213
 214         desc->callback          = rsnd_dma_complete;
 215         desc->callback_param    = dma;
 216
 217         if (dmaengine_submit(desc) < 0) {
 218                 dev_err(dev, "dmaengine_submit() fail\n");
 219                 return;
 220         }
 221
 222         dma_async_issue_pending(dma->chan);
 223 }
 224
 225 int rsnd_dma_available(struct rsnd_dma *dma)
 226 {
 227         return !!dma->chan;
 228 }
 229
 230 #define DMA_NAME_SIZE 16
 231 #define MOD_MAX 4 /* MEM/SSI/SRC/DVC */
 232 static int _rsnd_dma_of_name(char *dma_name, struct rsnd_mod *mod)
 233 {
 234         if (mod)
 235                 return snprintf(dma_name, DMA_NAME_SIZE / 2, "%s%d",
 236                          rsnd_mod_dma_name(mod), rsnd_mod_id(mod));
 237         else
 238                 return snprintf(dma_name, DMA_NAME_SIZE / 2, "mem");
 239
 240 }
 241
 242 static void rsnd_dma_of_name(struct rsnd_dma *dma,
 243                              int is_play, char *dma_name)
 244 {
 245         struct rsnd_mod *this = rsnd_dma_to_mod(dma);
 246         struct rsnd_dai_stream *io = rsnd_mod_to_io(this);
 247         struct rsnd_mod *ssi = rsnd_io_to_mod_ssi(io);
 248         struct rsnd_mod *src = rsnd_io_to_mod_src(io);
 249         struct rsnd_mod *dvc = rsnd_io_to_mod_dvc(io);
 250         struct rsnd_mod *mod[MOD_MAX];
 251         struct rsnd_mod *src_mod, *dst_mod;
 252         int i, index;
 253
 254
 255         for (i = 0; i < MOD_MAX; i++)
 256                 mod[i] = NULL;
 257
 258         /*
 259          * in play case...
 260          *
 261          * src -> dst
 262          *
 263          * mem -> SSI
 264          * mem -> SRC -> SSI
 265          * mem -> SRC -> DVC -> SSI
 266          */
 267         mod[0] = NULL; /* for "mem" */
 268         index = 1;
 269         for (i = 1; i < MOD_MAX; i++) {
 270                 if (!src) {
 271                         mod[i] = ssi;
 272                 } else if (!dvc) {
 273                         mod[i] = src;
 274                         src = NULL;
 275                 } else {
 276                         mod[i] = dvc;
 277                         dvc = NULL;
 278                 }
 279
 280                 if (mod[i] == this)
 281                         index = i;
 282
 283                 if (mod[i] == ssi)
 284                         break;
 285         }
 286
 287         if (is_play) {
 288                 src_mod = mod[index - 1];
 289                 dst_mod = mod[index];
 290         } else {
 291                 src_mod = mod[index];
 292                 dst_mod = mod[index - 1];
 293         }
 294
 295         index = 0;
 296         index = _rsnd_dma_of_name(dma_name + index, src_mod);
 297         *(dma_name + index++) = '_';
 298         index = _rsnd_dma_of_name(dma_name + index, dst_mod);
 299 }
 300
 301 int rsnd_dma_init(struct rsnd_priv *priv, struct rsnd_dma *dma,
 302                   int is_play, int id)
 303 {
 304         struct device *dev = rsnd_priv_to_dev(priv);
 305         struct dma_slave_config cfg;
 306         char dma_name[DMA_NAME_SIZE];
 307         dma_cap_mask_t mask;
 308         int ret;
 309
 310         if (dma->chan) {
 311                 dev_err(dev, "it already has dma channel\n");
 312                 return -EIO;
 313         }
 314
 315         dma_cap_zero(mask);
 316         dma_cap_set(DMA_SLAVE, mask);
 317
 318         rsnd_dma_of_name(dma, is_play, dma_name);
 319         rsnd_gen_dma_addr(priv, dma, &cfg, is_play, id);
 320
 321         dev_dbg(dev, "dma name : %s\n", dma_name);
 322
 323         dma->chan = dma_request_slave_channel_compat(mask, shdma_chan_filter,
 324                                                      (void *)id, dev,
 325                                                      dma_name);
 326         if (!dma->chan) {
 327                 dev_err(dev, "can't get dma channel\n");
 328                 return -EIO;
 329         }
 330
 331         ret = dmaengine_slave_config(dma->chan, &cfg);
 332         if (ret < 0)
 333                 goto rsnd_dma_init_err;
 334
 335         dma->dir = is_play ? DMA_MEM_TO_DEV : DMA_DEV_TO_MEM;
 336
 337         return 0;
 338
 339 rsnd_dma_init_err:
 340         rsnd_dma_quit(priv, dma);
 341
 342         return ret;
 343 }
 344
 345 void  rsnd_dma_quit(struct rsnd_priv *priv,
 346                     struct rsnd_dma *dma)
 347 {
 348         if (dma->chan)
 349                 dma_release_channel(dma->chan);
 350
 351         dma->chan = NULL;
 352 }
 353
 354 /*
 355  *      settting function
 356  */
 357 u32 rsnd_get_adinr(struct rsnd_mod *mod)
 358 {
 359         struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
 360         struct rsnd_dai_stream *io = rsnd_mod_to_io(mod);
 361         struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
 362         struct device *dev = rsnd_priv_to_dev(priv);
 363         u32 adinr = runtime->channels;
 364
 365         switch (runtime->sample_bits) {
 366         case 16:
 367                 adinr |= (8 << 16);
 368                 break;
 369         case 32:
 370                 adinr |= (0 << 16);
 371                 break;
 372         default:
 373                 dev_warn(dev, "not supported sample bits\n");
 374                 return 0;
 375         }
 376
 377         return adinr;
 378 }
 379
 380 /*
 381  *      rsnd_dai functions
 382  */
 383 #define __rsnd_mod_call(mod, func, rdai...)                     \
 384 ({                                                              \
 385         struct rsnd_priv *priv = rsnd_mod_to_priv(mod);         \
 386         struct device *dev = rsnd_priv_to_dev(priv);            \
 387         dev_dbg(dev, "%s [%d] %s\n",                            \
 388                 rsnd_mod_name(mod), rsnd_mod_id(mod), #func);   \
 389         (mod)->ops->func(mod, rdai);                            \
 390 })
 391
 392 #define rsnd_mod_call(mod, func, rdai...)       \
 393         (!(mod) ? -ENODEV :                     \
 394          !((mod)->ops->func) ? 0 :              \
 395          __rsnd_mod_call(mod, func, rdai))
 396
 397 #define rsnd_dai_call(fn, io, rdai...)                          \
 398 ({                                                              \
 399         struct rsnd_mod *mod;                                   \
 400         int ret = 0, i;                                         \
 401         for (i = 0; i < RSND_MOD_MAX; i++) {                    \
 402                 mod = (io)->mod[i];                             \
 403                 if (!mod)                                       \
 404                         continue;                               \
 405                 ret = rsnd_mod_call(mod, fn, rdai);             \
 406                 if (ret < 0)                                    \
 407                         break;                                  \
 408         }                                                       \
 409         ret;                                                    \
 410 })
 411
 412 static int rsnd_dai_connect(struct rsnd_mod *mod,
 413                             struct rsnd_dai_stream *io)
 414 {
 415         if (!mod)
 416                 return -EIO;
 417
 418         if (io->mod[mod->type]) {
 419                 struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
 420                 struct device *dev = rsnd_priv_to_dev(priv);
 421
 422                 dev_err(dev, "%s%d is not empty\n",
 423                         rsnd_mod_name(mod),
 424                         rsnd_mod_id(mod));
 425                 return -EIO;
 426         }
 427
 428         io->mod[mod->type] = mod;
 429         mod->io = io;
 430
 431         return 0;
 432 }
 433
 434 int rsnd_dai_id(struct rsnd_priv *priv, struct rsnd_dai *rdai)
 435 {
 436         int id = rdai - priv->rdai;
 437
 438         if ((id < 0) || (id >= rsnd_rdai_nr(priv)))
 439                 return -EINVAL;
 440
 441         return id;
 442 }
 443
 444 struct rsnd_dai *rsnd_dai_get(struct rsnd_priv *priv, int id)
 445 {
 446         if ((id < 0) || (id >= rsnd_rdai_nr(priv)))
 447                 return NULL;
 448
 449         return priv->rdai + id;
 450 }
 451
 452 static struct rsnd_dai *rsnd_dai_to_rdai(struct snd_soc_dai *dai)
 453 {
 454         struct rsnd_priv *priv = snd_soc_dai_get_drvdata(dai);
 455
 456         return rsnd_dai_get(priv, dai->id);
 457 }
 458
 459 int rsnd_dai_is_play(struct rsnd_dai *rdai, struct rsnd_dai_stream *io)
 460 {
 461         return &rdai->playback == io;
 462 }
 463
 464 /*
 465  *      rsnd_soc_dai functions
 466  */
 467 int rsnd_dai_pointer_offset(struct rsnd_dai_stream *io, int additional)
 468 {
 469         struct snd_pcm_substream *substream = io->substream;
 470         struct snd_pcm_runtime *runtime = substream->runtime;
 471         int pos = io->byte_pos + additional;
 472
 473         pos %= (runtime->periods * io->byte_per_period);
 474
 475         return pos;
 476 }
 477
 478 void rsnd_dai_pointer_update(struct rsnd_dai_stream *io, int byte)
 479 {
 480         io->byte_pos += byte;
 481
 482         if (io->byte_pos >= io->next_period_byte) {
 483                 struct snd_pcm_substream *substream = io->substream;
 484                 struct snd_pcm_runtime *runtime = substream->runtime;
 485
 486                 io->period_pos++;
 487                 io->next_period_byte += io->byte_per_period;
 488
 489                 if (io->period_pos >= runtime->periods) {
 490                         io->byte_pos = 0;
 491                         io->period_pos = 0;
 492                         io->next_period_byte = io->byte_per_period;
 493                 }
 494
 495                 snd_pcm_period_elapsed(substream);
 496         }
 497 }
 498
 499 static int rsnd_dai_stream_init(struct rsnd_dai_stream *io,
 500                                 struct snd_pcm_substream *substream)
 501 {
 502         struct snd_pcm_runtime *runtime = substream->runtime;
 503
 504         io->substream           = substream;
 505         io->byte_pos            = 0;
 506         io->period_pos          = 0;
 507         io->byte_per_period     = runtime->period_size *
 508                                   runtime->channels *
 509                                   samples_to_bytes(runtime, 1);
 510         io->next_period_byte    = io->byte_per_period;
 511
 512         return 0;
 513 }
 514
 515 static
 516 struct snd_soc_dai *rsnd_substream_to_dai(struct snd_pcm_substream *substream)
 517 {
 518         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 519
 520         return  rtd->cpu_dai;
 521 }
 522
 523 static
 524 struct rsnd_dai_stream *rsnd_rdai_to_io(struct rsnd_dai *rdai,
 525                                         struct snd_pcm_substream *substream)
 526 {
 527         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 528                 return &rdai->playback;
 529         else
 530                 return &rdai->capture;
 531 }
 532
 533 static int rsnd_soc_dai_trigger(struct snd_pcm_substream *substream, int cmd,
 534                             struct snd_soc_dai *dai)
 535 {
 536         struct rsnd_priv *priv = snd_soc_dai_get_drvdata(dai);
 537         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
 538         struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream);
 539         int ssi_id = rsnd_mod_id(rsnd_io_to_mod_ssi(io));
 540         int ret;
 541         unsigned long flags;
 542
 543         rsnd_lock(priv, flags);
 544
 545         switch (cmd) {
 546         case SNDRV_PCM_TRIGGER_START:
 547                 ret = rsnd_dai_stream_init(io, substream);
 548                 if (ret < 0)
 549                         goto dai_trigger_end;
 550
 551                 ret = rsnd_platform_call(priv, dai, start, ssi_id);
 552                 if (ret < 0)
 553                         goto dai_trigger_end;
 554
 555                 ret = rsnd_dai_call(init, io, rdai);
 556                 if (ret < 0)
 557                         goto dai_trigger_end;
 558
 559                 ret = rsnd_dai_call(start, io, rdai);
 560                 if (ret < 0)
 561                         goto dai_trigger_end;
 562                 break;
 563         case SNDRV_PCM_TRIGGER_STOP:
 564                 ret = rsnd_dai_call(stop, io, rdai);
 565                 if (ret < 0)
 566                         goto dai_trigger_end;
 567
 568                 ret = rsnd_dai_call(quit, io, rdai);
 569                 if (ret < 0)
 570                         goto dai_trigger_end;
 571
 572                 ret = rsnd_platform_call(priv, dai, stop, ssi_id);
 573                 if (ret < 0)
 574                         goto dai_trigger_end;
 575                 break;
 576         default:
 577                 ret = -EINVAL;
 578         }
 579
 580 dai_trigger_end:
 581         rsnd_unlock(priv, flags);
 582
 583         return ret;
 584 }
 585
 586 static int rsnd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
 587 {
 588         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
 589
 590         /* set master/slave audio interface */
 591         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 592         case SND_SOC_DAIFMT_CBM_CFM:
 593                 rdai->clk_master = 0;
 594                 break;
 595         case SND_SOC_DAIFMT_CBS_CFS:
 596                 rdai->clk_master = 1; /* codec is slave, cpu is master */
 597                 break;
 598         default:
 599                 return -EINVAL;
 600         }
 601
 602         /* set clock inversion */
 603         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
 604         case SND_SOC_DAIFMT_NB_IF:
 605                 rdai->bit_clk_inv = 0;
 606                 rdai->frm_clk_inv = 1;
 607                 break;
 608         case SND_SOC_DAIFMT_IB_NF:
 609                 rdai->bit_clk_inv = 1;
 610                 rdai->frm_clk_inv = 0;
 611                 break;
 612         case SND_SOC_DAIFMT_IB_IF:
 613                 rdai->bit_clk_inv = 1;
 614                 rdai->frm_clk_inv = 1;
 615                 break;
 616         case SND_SOC_DAIFMT_NB_NF:
 617         default:
 618                 rdai->bit_clk_inv = 0;
 619                 rdai->frm_clk_inv = 0;
 620                 break;
 621         }
 622
 623         /* set format */
 624         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 625         case SND_SOC_DAIFMT_I2S:
 626                 rdai->sys_delay = 0;
 627                 rdai->data_alignment = 0;
 628                 break;
 629         case SND_SOC_DAIFMT_LEFT_J:
 630                 rdai->sys_delay = 1;
 631                 rdai->data_alignment = 0;
 632                 break;
 633         case SND_SOC_DAIFMT_RIGHT_J:
 634                 rdai->sys_delay = 1;
 635                 rdai->data_alignment = 1;
 636                 break;
 637         }
 638
 639         return 0;
 640 }
 641
 642 static const struct snd_soc_dai_ops rsnd_soc_dai_ops = {
 643         .trigger        = rsnd_soc_dai_trigger,
 644         .set_fmt        = rsnd_soc_dai_set_fmt,
 645 };
 646
 647 #define rsnd_path_parse(priv, io, type)                         \
 648 ({                                                              \
 649         struct rsnd_mod *mod;                                   \
 650         int ret = 0;                                            \
 651         int id = -1;                                            \
 652                                                                 \
 653         if (rsnd_is_enable_path(io, type)) {                    \
 654                 id = rsnd_info_id(priv, io, type);              \
 655                 if (id >= 0) {                                  \
 656                         mod = rsnd_##type##_mod_get(priv, id);  \
 657                         ret = rsnd_dai_connect(mod, io);        \
 658                 }                                               \
 659         }                                                       \
 660         ret;                                                    \
 661 })
 662
 663 static int rsnd_path_init(struct rsnd_priv *priv,
 664                           struct rsnd_dai *rdai,
 665                           struct rsnd_dai_stream *io)
 666 {
 667         int ret;
 668
 669         /*
 670          * Gen1 is created by SRU/SSI, and this SRU is base module of
 671          * Gen2's SCU/SSIU/SSI. (Gen2 SCU/SSIU came from SRU)
 672          *
 673          * Easy image is..
 674          *      Gen1 SRU = Gen2 SCU + SSIU + etc
 675          *
 676          * Gen2 SCU path is very flexible, but, Gen1 SRU (SCU parts) is
 677          * using fixed path.
 678          */
 679
 680         /* SRC */
 681         ret = rsnd_path_parse(priv, io, src);
 682         if (ret < 0)
 683                 return ret;
 684
 685         /* SSI */
 686         ret = rsnd_path_parse(priv, io, ssi);
 687         if (ret < 0)
 688                 return ret;
 689
 690         /* DVC */
 691         ret = rsnd_path_parse(priv, io, dvc);
 692         if (ret < 0)
 693                 return ret;
 694
 695         return ret;
 696 }
 697
 698 static void rsnd_of_parse_dai(struct platform_device *pdev,
 699                               const struct rsnd_of_data *of_data,
 700                               struct rsnd_priv *priv)
 701 {
 702         struct device_node *dai_node,   *dai_np;
 703         struct device_node *ssi_node,   *ssi_np;
 704         struct device_node *src_node,   *src_np;
 705         struct device_node *playback, *capture;
 706         struct rsnd_dai_platform_info *dai_info;
 707         struct rcar_snd_info *info = rsnd_priv_to_info(priv);
 708         struct device *dev = &pdev->dev;
 709         int nr, i;
 710         int dai_i, ssi_i, src_i;
 711
 712         if (!of_data)
 713                 return;
 714
 715         dai_node = of_get_child_by_name(dev->of_node, "rcar_sound,dai");
 716         if (!dai_node)
 717                 return;
 718
 719         nr = of_get_child_count(dai_node);
 720         if (!nr)
 721                 return;
 722
 723         dai_info = devm_kzalloc(dev,
 724                                 sizeof(struct rsnd_dai_platform_info) * nr,
 725                                 GFP_KERNEL);
 726         if (!dai_info) {
 727                 dev_err(dev, "dai info allocation error\n");
 728                 return;
 729         }
 730
 731         info->dai_info_nr       = nr;
 732         info->dai_info          = dai_info;
 733
 734         ssi_node = of_get_child_by_name(dev->of_node, "rcar_sound,ssi");
 735         src_node = of_get_child_by_name(dev->of_node, "rcar_sound,src");
 736
 737 #define mod_parse(name)                                                 \
 738 if (name##_node) {                                                      \
 739         struct rsnd_##name##_platform_info *name##_info;                \
 740                                                                         \
 741         name##_i = 0;                                                   \
 742         for_each_child_of_node(name##_node, name##_np) {                \
 743                 name##_info = info->name##_info + name##_i;             \
 744                                                                         \
 745                 if (name##_np == playback)                              \
 746                         dai_info->playback.name = name##_info;          \
 747                 if (name##_np == capture)                               \
 748                         dai_info->capture.name = name##_info;           \
 749                                                                         \
 750                 name##_i++;                                             \
 751         }                                                               \
 752 }
 753
 754         /*
 755          * parse all dai
 756          */
 757         dai_i = 0;
 758         for_each_child_of_node(dai_node, dai_np) {
 759                 dai_info = info->dai_info + dai_i;
 760
 761                 for (i = 0;; i++) {
 762
 763                         playback = of_parse_phandle(dai_np, "playback", i);
 764                         capture  = of_parse_phandle(dai_np, "capture", i);
 765
 766                         if (!playback && !capture)
 767                                 break;
 768
 769                         mod_parse(ssi);
 770                         mod_parse(src);
 771
 772                         if (playback)
 773                                 of_node_put(playback);
 774                         if (capture)
 775                                 of_node_put(capture);
 776                 }
 777
 778                 dai_i++;
 779         }
 780 }
 781
 782 static int rsnd_dai_probe(struct platform_device *pdev,
 783                           const struct rsnd_of_data *of_data,
 784                           struct rsnd_priv *priv)
 785 {
 786         struct snd_soc_dai_driver *drv;
 787         struct rcar_snd_info *info = rsnd_priv_to_info(priv);
 788         struct rsnd_dai *rdai;
 789         struct rsnd_ssi_platform_info *pmod, *cmod;
 790         struct device *dev = rsnd_priv_to_dev(priv);
 791         int dai_nr;
 792         int i;
 793
 794         rsnd_of_parse_dai(pdev, of_data, priv);
 795
 796         dai_nr = info->dai_info_nr;
 797         if (!dai_nr) {
 798                 dev_err(dev, "no dai\n");
 799                 return -EIO;
 800         }
 801
 802         drv  = devm_kzalloc(dev, sizeof(*drv)  * dai_nr, GFP_KERNEL);
 803         rdai = devm_kzalloc(dev, sizeof(*rdai) * dai_nr, GFP_KERNEL);
 804         if (!drv || !rdai) {
 805                 dev_err(dev, "dai allocate failed\n");
 806                 return -ENOMEM;
 807         }
 808
 809         priv->rdai_nr   = dai_nr;
 810         priv->daidrv    = drv;
 811         priv->rdai      = rdai;
 812
 813         for (i = 0; i < dai_nr; i++) {
 814                 rdai[i].info = &info->dai_info[i];
 815
 816                 pmod = rdai[i].info->playback.ssi;
 817                 cmod = rdai[i].info->capture.ssi;
 818
 819                 /*
 820                  *      init rsnd_dai
 821                  */
 822                 snprintf(rdai[i].name, RSND_DAI_NAME_SIZE, "rsnd-dai.%d", i);
 823
 824                 /*
 825                  *      init snd_soc_dai_driver
 826                  */
 827                 drv[i].name     = rdai[i].name;
 828                 drv[i].ops      = &rsnd_soc_dai_ops;
 829                 if (pmod) {
 830                         drv[i].playback.rates           = RSND_RATES;
 831                         drv[i].playback.formats         = RSND_FMTS;
 832                         drv[i].playback.channels_min    = 2;
 833                         drv[i].playback.channels_max    = 2;
 834
 835                         rdai[i].playback.info = &info->dai_info[i].playback;
 836                         rsnd_path_init(priv, &rdai[i], &rdai[i].playback);
 837                 }
 838                 if (cmod) {
 839                         drv[i].capture.rates            = RSND_RATES;
 840                         drv[i].capture.formats          = RSND_FMTS;
 841                         drv[i].capture.channels_min     = 2;
 842                         drv[i].capture.channels_max     = 2;
 843
 844                         rdai[i].capture.info = &info->dai_info[i].capture;
 845                         rsnd_path_init(priv, &rdai[i], &rdai[i].capture);
 846                 }
 847
 848                 dev_dbg(dev, "%s (%s/%s)\n", rdai[i].name,
 849                         pmod ? "play"    : " -- ",
 850                         cmod ? "capture" : "  --   ");
 851         }
 852
 853         return 0;
 854 }
 855
 856 /*
 857  *              pcm ops
 858  */
 859 static struct snd_pcm_hardware rsnd_pcm_hardware = {
 860         .info =         SNDRV_PCM_INFO_INTERLEAVED      |
 861                         SNDRV_PCM_INFO_MMAP             |
 862                         SNDRV_PCM_INFO_MMAP_VALID,
 863         .buffer_bytes_max       = 64 * 1024,
 864         .period_bytes_min       = 32,
 865         .period_bytes_max       = 8192,
 866         .periods_min            = 1,
 867         .periods_max            = 32,
 868         .fifo_size              = 256,
 869 };
 870
 871 static int rsnd_pcm_open(struct snd_pcm_substream *substream)
 872 {
 873         struct snd_pcm_runtime *runtime = substream->runtime;
 874         int ret = 0;
 875
 876         snd_soc_set_runtime_hwparams(substream, &rsnd_pcm_hardware);
 877
 878         ret = snd_pcm_hw_constraint_integer(runtime,
 879                                             SNDRV_PCM_HW_PARAM_PERIODS);
 880
 881         return ret;
 882 }
 883
 884 static int rsnd_hw_params(struct snd_pcm_substream *substream,
 885                          struct snd_pcm_hw_params *hw_params)
 886 {
 887         return snd_pcm_lib_malloc_pages(substream,
 888                                         params_buffer_bytes(hw_params));
 889 }
 890
 891 static snd_pcm_uframes_t rsnd_pointer(struct snd_pcm_substream *substream)
 892 {
 893         struct snd_pcm_runtime *runtime = substream->runtime;
 894         struct snd_soc_dai *dai = rsnd_substream_to_dai(substream);
 895         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
 896         struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream);
 897
 898         return bytes_to_frames(runtime, io->byte_pos);
 899 }
 900
 901 static struct snd_pcm_ops rsnd_pcm_ops = {
 902         .open           = rsnd_pcm_open,
 903         .ioctl          = snd_pcm_lib_ioctl,
 904         .hw_params      = rsnd_hw_params,
 905         .hw_free        = snd_pcm_lib_free_pages,
 906         .pointer        = rsnd_pointer,
 907 };
 908
 909 /*
 910  *              snd_soc_platform
 911  */
 912
 913 #define PREALLOC_BUFFER         (32 * 1024)
 914 #define PREALLOC_BUFFER_MAX     (32 * 1024)
 915
 916 static int rsnd_pcm_new(struct snd_soc_pcm_runtime *rtd)
 917 {
 918         struct rsnd_priv *priv = snd_soc_dai_get_drvdata(rtd->cpu_dai);
 919         struct rsnd_dai *rdai;
 920         int i, ret;
 921
 922         for_each_rsnd_dai(rdai, priv, i) {
 923                 ret = rsnd_dai_call(pcm_new, &rdai->playback, rdai, rtd);
 924                 if (ret)
 925                         return ret;
 926
 927                 ret = rsnd_dai_call(pcm_new, &rdai->capture, rdai, rtd);
 928                 if (ret)
 929                         return ret;
 930         }
 931
 932         return snd_pcm_lib_preallocate_pages_for_all(
 933                 rtd->pcm,
 934                 SNDRV_DMA_TYPE_DEV,
 935                 rtd->card->snd_card->dev,
 936                 PREALLOC_BUFFER, PREALLOC_BUFFER_MAX);
 937 }
 938
 939 static void rsnd_pcm_free(struct snd_pcm *pcm)
 940 {
 941         snd_pcm_lib_preallocate_free_for_all(pcm);
 942 }
 943
 944 static struct snd_soc_platform_driver rsnd_soc_platform = {
 945         .ops            = &rsnd_pcm_ops,
 946         .pcm_new        = rsnd_pcm_new,
 947         .pcm_free       = rsnd_pcm_free,
 948 };
 949
 950 static const struct snd_soc_component_driver rsnd_soc_component = {
 951         .name           = "rsnd",
 952 };
 953
 954 /*
 955  *      rsnd probe
 956  */
 957 static int rsnd_probe(struct platform_device *pdev)
 958 {
 959         struct rcar_snd_info *info;
 960         struct rsnd_priv *priv;
 961         struct device *dev = &pdev->dev;
 962         struct rsnd_dai *rdai;
 963         const struct of_device_id *of_id = of_match_device(rsnd_of_match, dev);
 964         const struct rsnd_of_data *of_data;
 965         int (*probe_func[])(struct platform_device *pdev,
 966                             const struct rsnd_of_data *of_data,
 967                             struct rsnd_priv *priv) = {
 968                 rsnd_gen_probe,
 969                 rsnd_ssi_probe,
 970                 rsnd_src_probe,
 971                 rsnd_dvc_probe,
 972                 rsnd_adg_probe,
 973                 rsnd_dai_probe,
 974         };
 975         int ret, i;
 976
 977         info = NULL;
 978         of_data = NULL;
 979         if (of_id) {
 980                 info = devm_kzalloc(&pdev->dev,
 981                                     sizeof(struct rcar_snd_info), GFP_KERNEL);
 982                 of_data = of_id->data;
 983         } else {
 984                 info = pdev->dev.platform_data;
 985         }
 986
 987         if (!info) {
 988                 dev_err(dev, "driver needs R-Car sound information\n");
 989                 return -ENODEV;
 990         }
 991
 992         /*
 993          *      init priv data
 994          */
 995         priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
 996         if (!priv) {
 997                 dev_err(dev, "priv allocate failed\n");
 998                 return -ENODEV;
 999         }
1000
1001         priv->pdev      = pdev;
1002         priv->info      = info;
1003         spin_lock_init(&priv->lock);
1004
1005         /*
1006          *      init each module
1007          */
1008         for (i = 0; i < ARRAY_SIZE(probe_func); i++) {
1009                 ret = probe_func[i](pdev, of_data, priv);
1010                 if (ret)
1011                         return ret;
1012         }
1013
1014         for_each_rsnd_dai(rdai, priv, i) {
1015                 ret = rsnd_dai_call(probe, &rdai->playback, rdai);
1016                 if (ret)
1017                         return ret;
1018
1019                 ret = rsnd_dai_call(probe, &rdai->capture, rdai);
1020                 if (ret)
1021                         return ret;
1022         }
1023
1024         /*
1025          *      asoc register
1026          */
1027         ret = snd_soc_register_platform(dev, &rsnd_soc_platform);
1028         if (ret < 0) {
1029                 dev_err(dev, "cannot snd soc register\n");
1030                 return ret;
1031         }
1032
1033         ret = snd_soc_register_component(dev, &rsnd_soc_component,
1034                                          priv->daidrv, rsnd_rdai_nr(priv));
1035         if (ret < 0) {
1036                 dev_err(dev, "cannot snd dai register\n");
1037                 goto exit_snd_soc;
1038         }
1039
1040         dev_set_drvdata(dev, priv);
1041
1042         pm_runtime_enable(dev);
1043
1044         dev_info(dev, "probed\n");
1045         return ret;
1046
1047 exit_snd_soc:
1048         snd_soc_unregister_platform(dev);
1049
1050         return ret;
1051 }
1052
1053 static int rsnd_remove(struct platform_device *pdev)
1054 {
1055         struct rsnd_priv *priv = dev_get_drvdata(&pdev->dev);
1056         struct rsnd_dai *rdai;
1057         int ret, i;
1058
1059         pm_runtime_disable(&pdev->dev);
1060
1061         for_each_rsnd_dai(rdai, priv, i) {
1062                 ret = rsnd_dai_call(remove, &rdai->playback, rdai);
1063                 if (ret)
1064                         return ret;
1065
1066                 ret = rsnd_dai_call(remove, &rdai->capture, rdai);
1067                 if (ret)
1068                         return ret;
1069         }
1070
1071         return 0;
1072 }
1073
1074 static struct platform_driver rsnd_driver = {
1075         .driver = {
1076                 .name   = "rcar_sound",
1077                 .of_match_table = rsnd_of_match,
1078         },
1079         .probe          = rsnd_probe,
1080         .remove         = rsnd_remove,
1081 };
1082 module_platform_driver(rsnd_driver);
1083
1084 MODULE_LICENSE("GPL");
1085 MODULE_DESCRIPTION("Renesas R-Car audio driver");
1086 MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");
1087 MODULE_ALIAS("platform:rcar-pcm-audio");