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 scu
  77  *   |
  78  *   +- scu
  79  *      |
  80  *      +- scu[0]
  81  *      +- scu[1]
  82  *      +- scu[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 /*
 104  *      rsnd_platform functions
 105  */
 106 #define rsnd_platform_call(priv, dai, func, param...)   \
 107         (!(priv->info->func) ? 0 :              \
 108          priv->info->func(param))
 109
 110 /*
 111  *      rsnd_mod functions
 112  */
 113 char *rsnd_mod_name(struct rsnd_mod *mod)
 114 {
 115         if (!mod || !mod->ops)
 116                 return "unknown";
 117
 118         return mod->ops->name;
 119 }
 120
 121 void rsnd_mod_init(struct rsnd_priv *priv,
 122                    struct rsnd_mod *mod,
 123                    struct rsnd_mod_ops *ops,
 124                    int id)
 125 {
 126         mod->priv       = priv;
 127         mod->id         = id;
 128         mod->ops        = ops;
 129         INIT_LIST_HEAD(&mod->list);
 130 }
 131
 132 /*
 133  *      rsnd_dma functions
 134  */
 135 static void __rsnd_dma_start(struct rsnd_dma *dma);
 136 static void rsnd_dma_continue(struct rsnd_dma *dma)
 137 {
 138         /* push next A or B plane */
 139         dma->submit_loop = 1;
 140         schedule_work(&dma->work);
 141 }
 142
 143 void rsnd_dma_start(struct rsnd_dma *dma)
 144 {
 145         /* push both A and B plane*/
 146         dma->offset = 0;
 147         dma->submit_loop = 2;
 148         __rsnd_dma_start(dma);
 149 }
 150
 151 void rsnd_dma_stop(struct rsnd_dma *dma)
 152 {
 153         dma->submit_loop = 0;
 154         cancel_work_sync(&dma->work);
 155         dmaengine_terminate_all(dma->chan);
 156 }
 157
 158 static void rsnd_dma_complete(void *data)
 159 {
 160         struct rsnd_dma *dma = (struct rsnd_dma *)data;
 161         struct rsnd_mod *mod = rsnd_dma_to_mod(dma);
 162         struct rsnd_priv *priv = rsnd_mod_to_priv(rsnd_dma_to_mod(dma));
 163         struct rsnd_dai_stream *io = rsnd_mod_to_io(mod);
 164         unsigned long flags;
 165
 166         rsnd_lock(priv, flags);
 167
 168         /*
 169          * Renesas sound Gen1 needs 1 DMAC,
 170          * Gen2 needs 2 DMAC.
 171          * In Gen2 case, it are Audio-DMAC, and Audio-DMAC-peri-peri.
 172          * But, Audio-DMAC-peri-peri doesn't have interrupt,
 173          * and this driver is assuming that here.
 174          *
 175          * If Audio-DMAC-peri-peri has interrpt,
 176          * rsnd_dai_pointer_update() will be called twice,
 177          * ant it will breaks io->byte_pos
 178          */
 179
 180         rsnd_dai_pointer_update(io, io->byte_per_period);
 181
 182         if (dma->submit_loop)
 183                 rsnd_dma_continue(dma);
 184
 185         rsnd_unlock(priv, flags);
 186 }
 187
 188 static void __rsnd_dma_start(struct rsnd_dma *dma)
 189 {
 190         struct rsnd_mod *mod = rsnd_dma_to_mod(dma);
 191         struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
 192         struct rsnd_dai_stream *io = rsnd_mod_to_io(mod);
 193         struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
 194         struct device *dev = rsnd_priv_to_dev(priv);
 195         struct dma_async_tx_descriptor *desc;
 196         dma_addr_t buf;
 197         size_t len = io->byte_per_period;
 198         int i;
 199
 200         for (i = 0; i < dma->submit_loop; i++) {
 201
 202                 buf = runtime->dma_addr +
 203                         rsnd_dai_pointer_offset(io, dma->offset + len);
 204                 dma->offset = len;
 205
 206                 desc = dmaengine_prep_slave_single(
 207                         dma->chan, buf, len, dma->dir,
 208                         DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
 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
 226 static void rsnd_dma_do_work(struct work_struct *work)
 227 {
 228         struct rsnd_dma *dma = container_of(work, struct rsnd_dma, work);
 229
 230         __rsnd_dma_start(dma);
 231 }
 232
 233 int rsnd_dma_available(struct rsnd_dma *dma)
 234 {
 235         return !!dma->chan;
 236 }
 237
 238 int rsnd_dma_init(struct rsnd_priv *priv, struct rsnd_dma *dma,
 239                   int is_play, int id)
 240 {
 241         struct device *dev = rsnd_priv_to_dev(priv);
 242         struct dma_slave_config cfg;
 243         dma_cap_mask_t mask;
 244         int ret;
 245
 246         if (dma->chan) {
 247                 dev_err(dev, "it already has dma channel\n");
 248                 return -EIO;
 249         }
 250
 251         dma_cap_zero(mask);
 252         dma_cap_set(DMA_SLAVE, mask);
 253
 254         dma->chan = dma_request_slave_channel_compat(mask, shdma_chan_filter,
 255                                                      (void *)id, dev,
 256                                                      is_play ? "tx" : "rx");
 257         if (!dma->chan) {
 258                 dev_err(dev, "can't get dma channel\n");
 259                 return -EIO;
 260         }
 261
 262         cfg.slave_id    = id;
 263         cfg.dst_addr    = 0; /* use default addr when playback */
 264         cfg.src_addr    = 0; /* use default addr when capture */
 265         cfg.direction   = is_play ? DMA_MEM_TO_DEV : DMA_DEV_TO_MEM;
 266
 267         ret = dmaengine_slave_config(dma->chan, &cfg);
 268         if (ret < 0)
 269                 goto rsnd_dma_init_err;
 270
 271         dma->dir = is_play ? DMA_TO_DEVICE : DMA_FROM_DEVICE;
 272         INIT_WORK(&dma->work, rsnd_dma_do_work);
 273
 274         return 0;
 275
 276 rsnd_dma_init_err:
 277         rsnd_dma_quit(priv, dma);
 278
 279         return ret;
 280 }
 281
 282 void  rsnd_dma_quit(struct rsnd_priv *priv,
 283                     struct rsnd_dma *dma)
 284 {
 285         if (dma->chan)
 286                 dma_release_channel(dma->chan);
 287
 288         dma->chan = NULL;
 289 }
 290
 291 /*
 292  *      rsnd_dai functions
 293  */
 294 #define rsnd_dai_call(rdai, io, fn)                     \
 295 ({                                                      \
 296         struct rsnd_mod *mod, *n;                       \
 297         int ret = 0;                                    \
 298         for_each_rsnd_mod(mod, n, io) {                 \
 299                 ret = rsnd_mod_call(mod, fn, rdai, io); \
 300                 if (ret < 0)                            \
 301                         break;                          \
 302         }                                               \
 303         ret;                                            \
 304 })
 305
 306 int rsnd_dai_connect(struct rsnd_dai *rdai,
 307                      struct rsnd_mod *mod,
 308                      struct rsnd_dai_stream *io)
 309 {
 310         if (!mod)
 311                 return -EIO;
 312
 313         if (!list_empty(&mod->list)) {
 314                 struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
 315                 struct device *dev = rsnd_priv_to_dev(priv);
 316
 317                 dev_err(dev, "%s%d is not empty\n",
 318                         rsnd_mod_name(mod),
 319                         rsnd_mod_id(mod));
 320                 return -EIO;
 321         }
 322
 323         list_add_tail(&mod->list, &io->head);
 324         mod->io = io;
 325
 326         return 0;
 327 }
 328
 329 int rsnd_dai_disconnect(struct rsnd_mod *mod)
 330 {
 331         list_del_init(&mod->list);
 332         mod->io = NULL;
 333
 334         return 0;
 335 }
 336
 337 int rsnd_dai_id(struct rsnd_priv *priv, struct rsnd_dai *rdai)
 338 {
 339         int id = rdai - priv->rdai;
 340
 341         if ((id < 0) || (id >= rsnd_dai_nr(priv)))
 342                 return -EINVAL;
 343
 344         return id;
 345 }
 346
 347 struct rsnd_dai *rsnd_dai_get(struct rsnd_priv *priv, int id)
 348 {
 349         if ((id < 0) || (id >= rsnd_dai_nr(priv)))
 350                 return NULL;
 351
 352         return priv->rdai + id;
 353 }
 354
 355 static struct rsnd_dai *rsnd_dai_to_rdai(struct snd_soc_dai *dai)
 356 {
 357         struct rsnd_priv *priv = snd_soc_dai_get_drvdata(dai);
 358
 359         return rsnd_dai_get(priv, dai->id);
 360 }
 361
 362 int rsnd_dai_is_play(struct rsnd_dai *rdai, struct rsnd_dai_stream *io)
 363 {
 364         return &rdai->playback == io;
 365 }
 366
 367 /*
 368  *      rsnd_soc_dai functions
 369  */
 370 int rsnd_dai_pointer_offset(struct rsnd_dai_stream *io, int additional)
 371 {
 372         struct snd_pcm_substream *substream = io->substream;
 373         struct snd_pcm_runtime *runtime = substream->runtime;
 374         int pos = io->byte_pos + additional;
 375
 376         pos %= (runtime->periods * io->byte_per_period);
 377
 378         return pos;
 379 }
 380
 381 void rsnd_dai_pointer_update(struct rsnd_dai_stream *io, int byte)
 382 {
 383         io->byte_pos += byte;
 384
 385         if (io->byte_pos >= io->next_period_byte) {
 386                 struct snd_pcm_substream *substream = io->substream;
 387                 struct snd_pcm_runtime *runtime = substream->runtime;
 388
 389                 io->period_pos++;
 390                 io->next_period_byte += io->byte_per_period;
 391
 392                 if (io->period_pos >= runtime->periods) {
 393                         io->byte_pos = 0;
 394                         io->period_pos = 0;
 395                         io->next_period_byte = io->byte_per_period;
 396                 }
 397
 398                 snd_pcm_period_elapsed(substream);
 399         }
 400 }
 401
 402 static int rsnd_dai_stream_init(struct rsnd_dai_stream *io,
 403                                 struct snd_pcm_substream *substream)
 404 {
 405         struct snd_pcm_runtime *runtime = substream->runtime;
 406
 407         if (!list_empty(&io->head))
 408                 return -EIO;
 409
 410         INIT_LIST_HEAD(&io->head);
 411         io->substream           = substream;
 412         io->byte_pos            = 0;
 413         io->period_pos          = 0;
 414         io->byte_per_period     = runtime->period_size *
 415                                   runtime->channels *
 416                                   samples_to_bytes(runtime, 1);
 417         io->next_period_byte    = io->byte_per_period;
 418
 419         return 0;
 420 }
 421
 422 static
 423 struct snd_soc_dai *rsnd_substream_to_dai(struct snd_pcm_substream *substream)
 424 {
 425         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 426
 427         return  rtd->cpu_dai;
 428 }
 429
 430 static
 431 struct rsnd_dai_stream *rsnd_rdai_to_io(struct rsnd_dai *rdai,
 432                                         struct snd_pcm_substream *substream)
 433 {
 434         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 435                 return &rdai->playback;
 436         else
 437                 return &rdai->capture;
 438 }
 439
 440 static int rsnd_soc_dai_trigger(struct snd_pcm_substream *substream, int cmd,
 441                             struct snd_soc_dai *dai)
 442 {
 443         struct rsnd_priv *priv = snd_soc_dai_get_drvdata(dai);
 444         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
 445         struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream);
 446         struct rsnd_mod *mod = rsnd_ssi_mod_get_frm_dai(priv,
 447                                                 rsnd_dai_id(priv, rdai),
 448                                                 rsnd_dai_is_play(rdai, io));
 449         int ssi_id = rsnd_mod_id(mod);
 450         int ret;
 451         unsigned long flags;
 452
 453         rsnd_lock(priv, flags);
 454
 455         switch (cmd) {
 456         case SNDRV_PCM_TRIGGER_START:
 457                 ret = rsnd_dai_stream_init(io, substream);
 458                 if (ret < 0)
 459                         goto dai_trigger_end;
 460
 461                 ret = rsnd_platform_call(priv, dai, start, ssi_id);
 462                 if (ret < 0)
 463                         goto dai_trigger_end;
 464
 465                 ret = rsnd_gen_path_init(priv, rdai, io);
 466                 if (ret < 0)
 467                         goto dai_trigger_end;
 468
 469                 ret = rsnd_dai_call(rdai, io, init);
 470                 if (ret < 0)
 471                         goto dai_trigger_end;
 472
 473                 ret = rsnd_dai_call(rdai, io, start);
 474                 if (ret < 0)
 475                         goto dai_trigger_end;
 476                 break;
 477         case SNDRV_PCM_TRIGGER_STOP:
 478                 ret = rsnd_dai_call(rdai, io, stop);
 479                 if (ret < 0)
 480                         goto dai_trigger_end;
 481
 482                 ret = rsnd_dai_call(rdai, io, quit);
 483                 if (ret < 0)
 484                         goto dai_trigger_end;
 485
 486                 ret = rsnd_gen_path_exit(priv, rdai, io);
 487                 if (ret < 0)
 488                         goto dai_trigger_end;
 489
 490                 ret = rsnd_platform_call(priv, dai, stop, ssi_id);
 491                 if (ret < 0)
 492                         goto dai_trigger_end;
 493                 break;
 494         default:
 495                 ret = -EINVAL;
 496         }
 497
 498 dai_trigger_end:
 499         rsnd_unlock(priv, flags);
 500
 501         return ret;
 502 }
 503
 504 static int rsnd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
 505 {
 506         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
 507
 508         /* set master/slave audio interface */
 509         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 510         case SND_SOC_DAIFMT_CBM_CFM:
 511                 rdai->clk_master = 1;
 512                 break;
 513         case SND_SOC_DAIFMT_CBS_CFS:
 514                 rdai->clk_master = 0;
 515                 break;
 516         default:
 517                 return -EINVAL;
 518         }
 519
 520         /* set clock inversion */
 521         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
 522         case SND_SOC_DAIFMT_NB_IF:
 523                 rdai->bit_clk_inv = 0;
 524                 rdai->frm_clk_inv = 1;
 525                 break;
 526         case SND_SOC_DAIFMT_IB_NF:
 527                 rdai->bit_clk_inv = 1;
 528                 rdai->frm_clk_inv = 0;
 529                 break;
 530         case SND_SOC_DAIFMT_IB_IF:
 531                 rdai->bit_clk_inv = 1;
 532                 rdai->frm_clk_inv = 1;
 533                 break;
 534         case SND_SOC_DAIFMT_NB_NF:
 535         default:
 536                 rdai->bit_clk_inv = 0;
 537                 rdai->frm_clk_inv = 0;
 538                 break;
 539         }
 540
 541         /* set format */
 542         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 543         case SND_SOC_DAIFMT_I2S:
 544                 rdai->sys_delay = 0;
 545                 rdai->data_alignment = 0;
 546                 break;
 547         case SND_SOC_DAIFMT_LEFT_J:
 548                 rdai->sys_delay = 1;
 549                 rdai->data_alignment = 0;
 550                 break;
 551         case SND_SOC_DAIFMT_RIGHT_J:
 552                 rdai->sys_delay = 1;
 553                 rdai->data_alignment = 1;
 554                 break;
 555         }
 556
 557         return 0;
 558 }
 559
 560 static const struct snd_soc_dai_ops rsnd_soc_dai_ops = {
 561         .trigger        = rsnd_soc_dai_trigger,
 562         .set_fmt        = rsnd_soc_dai_set_fmt,
 563 };
 564
 565 static int rsnd_dai_probe(struct platform_device *pdev,
 566                           struct rcar_snd_info *info,
 567                           struct rsnd_priv *priv)
 568 {
 569         struct snd_soc_dai_driver *drv;
 570         struct rsnd_dai *rdai;
 571         struct rsnd_mod *pmod, *cmod;
 572         struct device *dev = rsnd_priv_to_dev(priv);
 573         int dai_nr;
 574         int i;
 575
 576         /* get max dai nr */
 577         for (dai_nr = 0; dai_nr < 32; dai_nr++) {
 578                 pmod = rsnd_ssi_mod_get_frm_dai(priv, dai_nr, 1);
 579                 cmod = rsnd_ssi_mod_get_frm_dai(priv, dai_nr, 0);
 580
 581                 if (!pmod && !cmod)
 582                         break;
 583         }
 584
 585         if (!dai_nr) {
 586                 dev_err(dev, "no dai\n");
 587                 return -EIO;
 588         }
 589
 590         drv  = devm_kzalloc(dev, sizeof(*drv)  * dai_nr, GFP_KERNEL);
 591         rdai = devm_kzalloc(dev, sizeof(*rdai) * dai_nr, GFP_KERNEL);
 592         if (!drv || !rdai) {
 593                 dev_err(dev, "dai allocate failed\n");
 594                 return -ENOMEM;
 595         }
 596
 597         for (i = 0; i < dai_nr; i++) {
 598
 599                 pmod = rsnd_ssi_mod_get_frm_dai(priv, i, 1);
 600                 cmod = rsnd_ssi_mod_get_frm_dai(priv, i, 0);
 601
 602                 /*
 603                  *      init rsnd_dai
 604                  */
 605                 INIT_LIST_HEAD(&rdai[i].playback.head);
 606                 INIT_LIST_HEAD(&rdai[i].capture.head);
 607
 608                 snprintf(rdai[i].name, RSND_DAI_NAME_SIZE, "rsnd-dai.%d", i);
 609
 610                 /*
 611                  *      init snd_soc_dai_driver
 612                  */
 613                 drv[i].name     = rdai[i].name;
 614                 drv[i].ops      = &rsnd_soc_dai_ops;
 615                 if (pmod) {
 616                         drv[i].playback.rates           = RSND_RATES;
 617                         drv[i].playback.formats         = RSND_FMTS;
 618                         drv[i].playback.channels_min    = 2;
 619                         drv[i].playback.channels_max    = 2;
 620                 }
 621                 if (cmod) {
 622                         drv[i].capture.rates            = RSND_RATES;
 623                         drv[i].capture.formats          = RSND_FMTS;
 624                         drv[i].capture.channels_min     = 2;
 625                         drv[i].capture.channels_max     = 2;
 626                 }
 627
 628                 dev_dbg(dev, "%s (%s/%s)\n", rdai[i].name,
 629                         pmod ? "play"    : " -- ",
 630                         cmod ? "capture" : "  --   ");
 631         }
 632
 633         priv->dai_nr    = dai_nr;
 634         priv->daidrv    = drv;
 635         priv->rdai      = rdai;
 636
 637         return 0;
 638 }
 639
 640 static void rsnd_dai_remove(struct platform_device *pdev,
 641                           struct rsnd_priv *priv)
 642 {
 643 }
 644
 645 /*
 646  *              pcm ops
 647  */
 648 static struct snd_pcm_hardware rsnd_pcm_hardware = {
 649         .info =         SNDRV_PCM_INFO_INTERLEAVED      |
 650                         SNDRV_PCM_INFO_MMAP             |
 651                         SNDRV_PCM_INFO_MMAP_VALID       |
 652                         SNDRV_PCM_INFO_PAUSE,
 653         .buffer_bytes_max       = 64 * 1024,
 654         .period_bytes_min       = 32,
 655         .period_bytes_max       = 8192,
 656         .periods_min            = 1,
 657         .periods_max            = 32,
 658         .fifo_size              = 256,
 659 };
 660
 661 static int rsnd_pcm_open(struct snd_pcm_substream *substream)
 662 {
 663         struct snd_pcm_runtime *runtime = substream->runtime;
 664         int ret = 0;
 665
 666         snd_soc_set_runtime_hwparams(substream, &rsnd_pcm_hardware);
 667
 668         ret = snd_pcm_hw_constraint_integer(runtime,
 669                                             SNDRV_PCM_HW_PARAM_PERIODS);
 670
 671         return ret;
 672 }
 673
 674 static int rsnd_hw_params(struct snd_pcm_substream *substream,
 675                          struct snd_pcm_hw_params *hw_params)
 676 {
 677         return snd_pcm_lib_malloc_pages(substream,
 678                                         params_buffer_bytes(hw_params));
 679 }
 680
 681 static snd_pcm_uframes_t rsnd_pointer(struct snd_pcm_substream *substream)
 682 {
 683         struct snd_pcm_runtime *runtime = substream->runtime;
 684         struct snd_soc_dai *dai = rsnd_substream_to_dai(substream);
 685         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
 686         struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream);
 687
 688         return bytes_to_frames(runtime, io->byte_pos);
 689 }
 690
 691 static struct snd_pcm_ops rsnd_pcm_ops = {
 692         .open           = rsnd_pcm_open,
 693         .ioctl          = snd_pcm_lib_ioctl,
 694         .hw_params      = rsnd_hw_params,
 695         .hw_free        = snd_pcm_lib_free_pages,
 696         .pointer        = rsnd_pointer,
 697 };
 698
 699 /*
 700  *              snd_soc_platform
 701  */
 702
 703 #define PREALLOC_BUFFER         (32 * 1024)
 704 #define PREALLOC_BUFFER_MAX     (32 * 1024)
 705
 706 static int rsnd_pcm_new(struct snd_soc_pcm_runtime *rtd)
 707 {
 708         return snd_pcm_lib_preallocate_pages_for_all(
 709                 rtd->pcm,
 710                 SNDRV_DMA_TYPE_DEV,
 711                 rtd->card->snd_card->dev,
 712                 PREALLOC_BUFFER, PREALLOC_BUFFER_MAX);
 713 }
 714
 715 static void rsnd_pcm_free(struct snd_pcm *pcm)
 716 {
 717         snd_pcm_lib_preallocate_free_for_all(pcm);
 718 }
 719
 720 static struct snd_soc_platform_driver rsnd_soc_platform = {
 721         .ops            = &rsnd_pcm_ops,
 722         .pcm_new        = rsnd_pcm_new,
 723         .pcm_free       = rsnd_pcm_free,
 724 };
 725
 726 static const struct snd_soc_component_driver rsnd_soc_component = {
 727         .name           = "rsnd",
 728 };
 729
 730 /*
 731  *      rsnd probe
 732  */
 733 static int rsnd_probe(struct platform_device *pdev)
 734 {
 735         struct rcar_snd_info *info;
 736         struct rsnd_priv *priv;
 737         struct device *dev = &pdev->dev;
 738         int ret;
 739
 740         info = pdev->dev.platform_data;
 741         if (!info) {
 742                 dev_err(dev, "driver needs R-Car sound information\n");
 743                 return -ENODEV;
 744         }
 745
 746         /*
 747          *      init priv data
 748          */
 749         priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
 750         if (!priv) {
 751                 dev_err(dev, "priv allocate failed\n");
 752                 return -ENODEV;
 753         }
 754
 755         priv->dev       = dev;
 756         priv->info      = info;
 757         spin_lock_init(&priv->lock);
 758
 759         /*
 760          *      init each module
 761          */
 762         ret = rsnd_gen_probe(pdev, info, priv);
 763         if (ret)
 764                 return ret;
 765
 766         ret = rsnd_scu_probe(pdev, info, priv);
 767         if (ret)
 768                 return ret;
 769
 770         ret = rsnd_adg_probe(pdev, info, priv);
 771         if (ret)
 772                 return ret;
 773
 774         ret = rsnd_ssi_probe(pdev, info, priv);
 775         if (ret)
 776                 return ret;
 777
 778         ret = rsnd_dai_probe(pdev, info, priv);
 779         if (ret)
 780                 return ret;
 781
 782         /*
 783          *      asoc register
 784          */
 785         ret = snd_soc_register_platform(dev, &rsnd_soc_platform);
 786         if (ret < 0) {
 787                 dev_err(dev, "cannot snd soc register\n");
 788                 return ret;
 789         }
 790
 791         ret = snd_soc_register_component(dev, &rsnd_soc_component,
 792                                          priv->daidrv, rsnd_dai_nr(priv));
 793         if (ret < 0) {
 794                 dev_err(dev, "cannot snd dai register\n");
 795                 goto exit_snd_soc;
 796         }
 797
 798         dev_set_drvdata(dev, priv);
 799
 800         pm_runtime_enable(dev);
 801
 802         dev_info(dev, "probed\n");
 803         return ret;
 804
 805 exit_snd_soc:
 806         snd_soc_unregister_platform(dev);
 807
 808         return ret;
 809 }
 810
 811 static int rsnd_remove(struct platform_device *pdev)
 812 {
 813         struct rsnd_priv *priv = dev_get_drvdata(&pdev->dev);
 814
 815         pm_runtime_disable(&pdev->dev);
 816
 817         /*
 818          *      remove each module
 819          */
 820         rsnd_ssi_remove(pdev, priv);
 821         rsnd_adg_remove(pdev, priv);
 822         rsnd_scu_remove(pdev, priv);
 823         rsnd_dai_remove(pdev, priv);
 824         rsnd_gen_remove(pdev, priv);
 825
 826         return 0;
 827 }
 828
 829 static struct platform_driver rsnd_driver = {
 830         .driver = {
 831                 .name   = "rcar_sound",
 832         },
 833         .probe          = rsnd_probe,
 834         .remove         = rsnd_remove,
 835 };
 836 module_platform_driver(rsnd_driver);
 837
 838 MODULE_LICENSE("GPL");
 839 MODULE_DESCRIPTION("Renesas R-Car audio driver");
 840 MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");
 841 MODULE_ALIAS("platform:rcar-pcm-audio");