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_continue(struct rsnd_dma *dma)
 136 {
 137         /* push next A or B plane */
 138         dma->submit_loop = 1;
 139         schedule_work(&dma->work);
 140 }
 141
 142 void rsnd_dma_start(struct rsnd_dma *dma)
 143 {
 144         /* push both A and B plane*/
 145         dma->submit_loop = 2;
 146         schedule_work(&dma->work);
 147 }
 148
 149 void rsnd_dma_stop(struct rsnd_dma *dma)
 150 {
 151         dma->submit_loop = 0;
 152         cancel_work_sync(&dma->work);
 153         dmaengine_terminate_all(dma->chan);
 154 }
 155
 156 static void rsnd_dma_complete(void *data)
 157 {
 158         struct rsnd_dma *dma = (struct rsnd_dma *)data;
 159         struct rsnd_priv *priv = dma->priv;
 160         unsigned long flags;
 161
 162         rsnd_lock(priv, flags);
 163
 164         dma->complete(dma);
 165
 166         if (dma->submit_loop)
 167                 rsnd_dma_continue(dma);
 168
 169         rsnd_unlock(priv, flags);
 170 }
 171
 172 static void rsnd_dma_do_work(struct work_struct *work)
 173 {
 174         struct rsnd_dma *dma = container_of(work, struct rsnd_dma, work);
 175         struct rsnd_priv *priv = dma->priv;
 176         struct device *dev = rsnd_priv_to_dev(priv);
 177         struct dma_async_tx_descriptor *desc;
 178         dma_addr_t buf;
 179         size_t len;
 180         int i;
 181
 182         for (i = 0; i < dma->submit_loop; i++) {
 183
 184                 if (dma->inquiry(dma, &buf, &len) < 0)
 185                         return;
 186
 187                 desc = dmaengine_prep_slave_single(
 188                         dma->chan, buf, len, dma->dir,
 189                         DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
 190                 if (!desc) {
 191                         dev_err(dev, "dmaengine_prep_slave_sg() fail\n");
 192                         return;
 193                 }
 194
 195                 desc->callback          = rsnd_dma_complete;
 196                 desc->callback_param    = dma;
 197
 198                 if (dmaengine_submit(desc) < 0) {
 199                         dev_err(dev, "dmaengine_submit() fail\n");
 200                         return;
 201                 }
 202
 203         }
 204
 205         dma_async_issue_pending(dma->chan);
 206 }
 207
 208 int rsnd_dma_available(struct rsnd_dma *dma)
 209 {
 210         return !!dma->chan;
 211 }
 212
 213 int rsnd_dma_init(struct rsnd_priv *priv, struct rsnd_dma *dma,
 214                   int is_play, int id,
 215                   int (*inquiry)(struct rsnd_dma *dma,
 216                                   dma_addr_t *buf, int *len),
 217                   int (*complete)(struct rsnd_dma *dma))
 218 {
 219         struct device *dev = rsnd_priv_to_dev(priv);
 220         struct dma_slave_config cfg;
 221         dma_cap_mask_t mask;
 222         int ret;
 223
 224         if (dma->chan) {
 225                 dev_err(dev, "it already has dma channel\n");
 226                 return -EIO;
 227         }
 228
 229         dma_cap_zero(mask);
 230         dma_cap_set(DMA_SLAVE, mask);
 231
 232         dma->chan = dma_request_slave_channel_compat(mask, shdma_chan_filter,
 233                                                      (void *)id, dev,
 234                                                      is_play ? "tx" : "rx");
 235         if (!dma->chan) {
 236                 dev_err(dev, "can't get dma channel\n");
 237                 return -EIO;
 238         }
 239
 240         cfg.slave_id    = id;
 241         cfg.dst_addr    = 0; /* use default addr when playback */
 242         cfg.src_addr    = 0; /* use default addr when capture */
 243         cfg.direction   = is_play ? DMA_MEM_TO_DEV : DMA_DEV_TO_MEM;
 244
 245         ret = dmaengine_slave_config(dma->chan, &cfg);
 246         if (ret < 0)
 247                 goto rsnd_dma_init_err;
 248
 249         dma->dir = is_play ? DMA_TO_DEVICE : DMA_FROM_DEVICE;
 250         dma->priv = priv;
 251         dma->inquiry = inquiry;
 252         dma->complete = complete;
 253         INIT_WORK(&dma->work, rsnd_dma_do_work);
 254
 255         return 0;
 256
 257 rsnd_dma_init_err:
 258         rsnd_dma_quit(priv, dma);
 259
 260         return ret;
 261 }
 262
 263 void  rsnd_dma_quit(struct rsnd_priv *priv,
 264                     struct rsnd_dma *dma)
 265 {
 266         if (dma->chan)
 267                 dma_release_channel(dma->chan);
 268
 269         dma->chan = NULL;
 270 }
 271
 272 /*
 273  *      rsnd_dai functions
 274  */
 275 #define rsnd_dai_call(rdai, io, fn)                     \
 276 ({                                                      \
 277         struct rsnd_mod *mod, *n;                       \
 278         int ret = 0;                                    \
 279         for_each_rsnd_mod(mod, n, io) {                 \
 280                 ret = rsnd_mod_call(mod, fn, rdai, io); \
 281                 if (ret < 0)                            \
 282                         break;                          \
 283         }                                               \
 284         ret;                                            \
 285 })
 286
 287 int rsnd_dai_connect(struct rsnd_dai *rdai,
 288                      struct rsnd_mod *mod,
 289                      struct rsnd_dai_stream *io)
 290 {
 291         struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
 292         struct device *dev = rsnd_priv_to_dev(priv);
 293
 294         if (!mod) {
 295                 dev_err(dev, "NULL mod\n");
 296                 return -EIO;
 297         }
 298
 299         if (!list_empty(&mod->list)) {
 300                 dev_err(dev, "%s%d is not empty\n",
 301                         rsnd_mod_name(mod),
 302                         rsnd_mod_id(mod));
 303                 return -EIO;
 304         }
 305
 306         list_add_tail(&mod->list, &io->head);
 307
 308         return 0;
 309 }
 310
 311 int rsnd_dai_disconnect(struct rsnd_mod *mod)
 312 {
 313         list_del_init(&mod->list);
 314
 315         return 0;
 316 }
 317
 318 int rsnd_dai_id(struct rsnd_priv *priv, struct rsnd_dai *rdai)
 319 {
 320         int id = rdai - priv->rdai;
 321
 322         if ((id < 0) || (id >= rsnd_dai_nr(priv)))
 323                 return -EINVAL;
 324
 325         return id;
 326 }
 327
 328 struct rsnd_dai *rsnd_dai_get(struct rsnd_priv *priv, int id)
 329 {
 330         if ((id < 0) || (id >= rsnd_dai_nr(priv)))
 331                 return NULL;
 332
 333         return priv->rdai + id;
 334 }
 335
 336 static struct rsnd_dai *rsnd_dai_to_rdai(struct snd_soc_dai *dai)
 337 {
 338         struct rsnd_priv *priv = snd_soc_dai_get_drvdata(dai);
 339
 340         return rsnd_dai_get(priv, dai->id);
 341 }
 342
 343 int rsnd_dai_is_play(struct rsnd_dai *rdai, struct rsnd_dai_stream *io)
 344 {
 345         return &rdai->playback == io;
 346 }
 347
 348 /*
 349  *      rsnd_soc_dai functions
 350  */
 351 int rsnd_dai_pointer_offset(struct rsnd_dai_stream *io, int additional)
 352 {
 353         struct snd_pcm_substream *substream = io->substream;
 354         struct snd_pcm_runtime *runtime = substream->runtime;
 355         int pos = io->byte_pos + additional;
 356
 357         pos %= (runtime->periods * io->byte_per_period);
 358
 359         return pos;
 360 }
 361
 362 void rsnd_dai_pointer_update(struct rsnd_dai_stream *io, int byte)
 363 {
 364         io->byte_pos += byte;
 365
 366         if (io->byte_pos >= io->next_period_byte) {
 367                 struct snd_pcm_substream *substream = io->substream;
 368                 struct snd_pcm_runtime *runtime = substream->runtime;
 369
 370                 io->period_pos++;
 371                 io->next_period_byte += io->byte_per_period;
 372
 373                 if (io->period_pos >= runtime->periods) {
 374                         io->byte_pos = 0;
 375                         io->period_pos = 0;
 376                         io->next_period_byte = io->byte_per_period;
 377                 }
 378
 379                 snd_pcm_period_elapsed(substream);
 380         }
 381 }
 382
 383 static int rsnd_dai_stream_init(struct rsnd_dai_stream *io,
 384                                 struct snd_pcm_substream *substream)
 385 {
 386         struct snd_pcm_runtime *runtime = substream->runtime;
 387
 388         if (!list_empty(&io->head))
 389                 return -EIO;
 390
 391         INIT_LIST_HEAD(&io->head);
 392         io->substream           = substream;
 393         io->byte_pos            = 0;
 394         io->period_pos          = 0;
 395         io->byte_per_period     = runtime->period_size *
 396                                   runtime->channels *
 397                                   samples_to_bytes(runtime, 1);
 398         io->next_period_byte    = io->byte_per_period;
 399
 400         return 0;
 401 }
 402
 403 static
 404 struct snd_soc_dai *rsnd_substream_to_dai(struct snd_pcm_substream *substream)
 405 {
 406         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 407
 408         return  rtd->cpu_dai;
 409 }
 410
 411 static
 412 struct rsnd_dai_stream *rsnd_rdai_to_io(struct rsnd_dai *rdai,
 413                                         struct snd_pcm_substream *substream)
 414 {
 415         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 416                 return &rdai->playback;
 417         else
 418                 return &rdai->capture;
 419 }
 420
 421 static int rsnd_soc_dai_trigger(struct snd_pcm_substream *substream, int cmd,
 422                             struct snd_soc_dai *dai)
 423 {
 424         struct rsnd_priv *priv = snd_soc_dai_get_drvdata(dai);
 425         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
 426         struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream);
 427         struct rsnd_mod *mod = rsnd_ssi_mod_get_frm_dai(priv,
 428                                                 rsnd_dai_id(priv, rdai),
 429                                                 rsnd_dai_is_play(rdai, io));
 430         int ssi_id = rsnd_mod_id(mod);
 431         int ret;
 432         unsigned long flags;
 433
 434         rsnd_lock(priv, flags);
 435
 436         switch (cmd) {
 437         case SNDRV_PCM_TRIGGER_START:
 438                 ret = rsnd_dai_stream_init(io, substream);
 439                 if (ret < 0)
 440                         goto dai_trigger_end;
 441
 442                 ret = rsnd_platform_call(priv, dai, start, ssi_id);
 443                 if (ret < 0)
 444                         goto dai_trigger_end;
 445
 446                 ret = rsnd_gen_path_init(priv, rdai, io);
 447                 if (ret < 0)
 448                         goto dai_trigger_end;
 449
 450                 ret = rsnd_dai_call(rdai, io, init);
 451                 if (ret < 0)
 452                         goto dai_trigger_end;
 453
 454                 ret = rsnd_dai_call(rdai, io, start);
 455                 if (ret < 0)
 456                         goto dai_trigger_end;
 457                 break;
 458         case SNDRV_PCM_TRIGGER_STOP:
 459                 ret = rsnd_dai_call(rdai, io, stop);
 460                 if (ret < 0)
 461                         goto dai_trigger_end;
 462
 463                 ret = rsnd_dai_call(rdai, io, quit);
 464                 if (ret < 0)
 465                         goto dai_trigger_end;
 466
 467                 ret = rsnd_gen_path_exit(priv, rdai, io);
 468                 if (ret < 0)
 469                         goto dai_trigger_end;
 470
 471                 ret = rsnd_platform_call(priv, dai, stop, ssi_id);
 472                 if (ret < 0)
 473                         goto dai_trigger_end;
 474                 break;
 475         default:
 476                 ret = -EINVAL;
 477         }
 478
 479 dai_trigger_end:
 480         rsnd_unlock(priv, flags);
 481
 482         return ret;
 483 }
 484
 485 static int rsnd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
 486 {
 487         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
 488
 489         /* set master/slave audio interface */
 490         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 491         case SND_SOC_DAIFMT_CBM_CFM:
 492                 rdai->clk_master = 1;
 493                 break;
 494         case SND_SOC_DAIFMT_CBS_CFS:
 495                 rdai->clk_master = 0;
 496                 break;
 497         default:
 498                 return -EINVAL;
 499         }
 500
 501         /* set clock inversion */
 502         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
 503         case SND_SOC_DAIFMT_NB_IF:
 504                 rdai->bit_clk_inv = 0;
 505                 rdai->frm_clk_inv = 1;
 506                 break;
 507         case SND_SOC_DAIFMT_IB_NF:
 508                 rdai->bit_clk_inv = 1;
 509                 rdai->frm_clk_inv = 0;
 510                 break;
 511         case SND_SOC_DAIFMT_IB_IF:
 512                 rdai->bit_clk_inv = 1;
 513                 rdai->frm_clk_inv = 1;
 514                 break;
 515         case SND_SOC_DAIFMT_NB_NF:
 516         default:
 517                 rdai->bit_clk_inv = 0;
 518                 rdai->frm_clk_inv = 0;
 519                 break;
 520         }
 521
 522         /* set format */
 523         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 524         case SND_SOC_DAIFMT_I2S:
 525                 rdai->sys_delay = 0;
 526                 rdai->data_alignment = 0;
 527                 break;
 528         case SND_SOC_DAIFMT_LEFT_J:
 529                 rdai->sys_delay = 1;
 530                 rdai->data_alignment = 0;
 531                 break;
 532         case SND_SOC_DAIFMT_RIGHT_J:
 533                 rdai->sys_delay = 1;
 534                 rdai->data_alignment = 1;
 535                 break;
 536         }
 537
 538         return 0;
 539 }
 540
 541 static const struct snd_soc_dai_ops rsnd_soc_dai_ops = {
 542         .trigger        = rsnd_soc_dai_trigger,
 543         .set_fmt        = rsnd_soc_dai_set_fmt,
 544 };
 545
 546 static int rsnd_dai_probe(struct platform_device *pdev,
 547                           struct rcar_snd_info *info,
 548                           struct rsnd_priv *priv)
 549 {
 550         struct snd_soc_dai_driver *drv;
 551         struct rsnd_dai *rdai;
 552         struct rsnd_mod *pmod, *cmod;
 553         struct device *dev = rsnd_priv_to_dev(priv);
 554         int dai_nr;
 555         int i;
 556
 557         /* get max dai nr */
 558         for (dai_nr = 0; dai_nr < 32; dai_nr++) {
 559                 pmod = rsnd_ssi_mod_get_frm_dai(priv, dai_nr, 1);
 560                 cmod = rsnd_ssi_mod_get_frm_dai(priv, dai_nr, 0);
 561
 562                 if (!pmod && !cmod)
 563                         break;
 564         }
 565
 566         if (!dai_nr) {
 567                 dev_err(dev, "no dai\n");
 568                 return -EIO;
 569         }
 570
 571         drv  = devm_kzalloc(dev, sizeof(*drv)  * dai_nr, GFP_KERNEL);
 572         rdai = devm_kzalloc(dev, sizeof(*rdai) * dai_nr, GFP_KERNEL);
 573         if (!drv || !rdai) {
 574                 dev_err(dev, "dai allocate failed\n");
 575                 return -ENOMEM;
 576         }
 577
 578         for (i = 0; i < dai_nr; i++) {
 579
 580                 pmod = rsnd_ssi_mod_get_frm_dai(priv, i, 1);
 581                 cmod = rsnd_ssi_mod_get_frm_dai(priv, i, 0);
 582
 583                 /*
 584                  *      init rsnd_dai
 585                  */
 586                 INIT_LIST_HEAD(&rdai[i].playback.head);
 587                 INIT_LIST_HEAD(&rdai[i].capture.head);
 588
 589                 snprintf(rdai[i].name, RSND_DAI_NAME_SIZE, "rsnd-dai.%d", i);
 590
 591                 /*
 592                  *      init snd_soc_dai_driver
 593                  */
 594                 drv[i].name     = rdai[i].name;
 595                 drv[i].ops      = &rsnd_soc_dai_ops;
 596                 if (pmod) {
 597                         drv[i].playback.rates           = RSND_RATES;
 598                         drv[i].playback.formats         = RSND_FMTS;
 599                         drv[i].playback.channels_min    = 2;
 600                         drv[i].playback.channels_max    = 2;
 601                 }
 602                 if (cmod) {
 603                         drv[i].capture.rates            = RSND_RATES;
 604                         drv[i].capture.formats          = RSND_FMTS;
 605                         drv[i].capture.channels_min     = 2;
 606                         drv[i].capture.channels_max     = 2;
 607                 }
 608
 609                 dev_dbg(dev, "%s (%s/%s)\n", rdai[i].name,
 610                         pmod ? "play"    : " -- ",
 611                         cmod ? "capture" : "  --   ");
 612         }
 613
 614         priv->dai_nr    = dai_nr;
 615         priv->daidrv    = drv;
 616         priv->rdai      = rdai;
 617
 618         return 0;
 619 }
 620
 621 static void rsnd_dai_remove(struct platform_device *pdev,
 622                           struct rsnd_priv *priv)
 623 {
 624 }
 625
 626 /*
 627  *              pcm ops
 628  */
 629 static struct snd_pcm_hardware rsnd_pcm_hardware = {
 630         .info =         SNDRV_PCM_INFO_INTERLEAVED      |
 631                         SNDRV_PCM_INFO_MMAP             |
 632                         SNDRV_PCM_INFO_MMAP_VALID       |
 633                         SNDRV_PCM_INFO_PAUSE,
 634         .formats                = RSND_FMTS,
 635         .rates                  = RSND_RATES,
 636         .rate_min               = 8000,
 637         .rate_max               = 192000,
 638         .channels_min           = 2,
 639         .channels_max           = 2,
 640         .buffer_bytes_max       = 64 * 1024,
 641         .period_bytes_min       = 32,
 642         .period_bytes_max       = 8192,
 643         .periods_min            = 1,
 644         .periods_max            = 32,
 645         .fifo_size              = 256,
 646 };
 647
 648 static int rsnd_pcm_open(struct snd_pcm_substream *substream)
 649 {
 650         struct snd_pcm_runtime *runtime = substream->runtime;
 651         int ret = 0;
 652
 653         snd_soc_set_runtime_hwparams(substream, &rsnd_pcm_hardware);
 654
 655         ret = snd_pcm_hw_constraint_integer(runtime,
 656                                             SNDRV_PCM_HW_PARAM_PERIODS);
 657
 658         return ret;
 659 }
 660
 661 static int rsnd_hw_params(struct snd_pcm_substream *substream,
 662                          struct snd_pcm_hw_params *hw_params)
 663 {
 664         return snd_pcm_lib_malloc_pages(substream,
 665                                         params_buffer_bytes(hw_params));
 666 }
 667
 668 static snd_pcm_uframes_t rsnd_pointer(struct snd_pcm_substream *substream)
 669 {
 670         struct snd_pcm_runtime *runtime = substream->runtime;
 671         struct snd_soc_dai *dai = rsnd_substream_to_dai(substream);
 672         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
 673         struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream);
 674
 675         return bytes_to_frames(runtime, io->byte_pos);
 676 }
 677
 678 static struct snd_pcm_ops rsnd_pcm_ops = {
 679         .open           = rsnd_pcm_open,
 680         .ioctl          = snd_pcm_lib_ioctl,
 681         .hw_params      = rsnd_hw_params,
 682         .hw_free        = snd_pcm_lib_free_pages,
 683         .pointer        = rsnd_pointer,
 684 };
 685
 686 /*
 687  *              snd_soc_platform
 688  */
 689
 690 #define PREALLOC_BUFFER         (32 * 1024)
 691 #define PREALLOC_BUFFER_MAX     (32 * 1024)
 692
 693 static int rsnd_pcm_new(struct snd_soc_pcm_runtime *rtd)
 694 {
 695         return snd_pcm_lib_preallocate_pages_for_all(
 696                 rtd->pcm,
 697                 SNDRV_DMA_TYPE_DEV,
 698                 rtd->card->snd_card->dev,
 699                 PREALLOC_BUFFER, PREALLOC_BUFFER_MAX);
 700 }
 701
 702 static void rsnd_pcm_free(struct snd_pcm *pcm)
 703 {
 704         snd_pcm_lib_preallocate_free_for_all(pcm);
 705 }
 706
 707 static struct snd_soc_platform_driver rsnd_soc_platform = {
 708         .ops            = &rsnd_pcm_ops,
 709         .pcm_new        = rsnd_pcm_new,
 710         .pcm_free       = rsnd_pcm_free,
 711 };
 712
 713 static const struct snd_soc_component_driver rsnd_soc_component = {
 714         .name           = "rsnd",
 715 };
 716
 717 /*
 718  *      rsnd probe
 719  */
 720 static int rsnd_probe(struct platform_device *pdev)
 721 {
 722         struct rcar_snd_info *info;
 723         struct rsnd_priv *priv;
 724         struct device *dev = &pdev->dev;
 725         int ret;
 726
 727         info = pdev->dev.platform_data;
 728         if (!info) {
 729                 dev_err(dev, "driver needs R-Car sound information\n");
 730                 return -ENODEV;
 731         }
 732
 733         /*
 734          *      init priv data
 735          */
 736         priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
 737         if (!priv) {
 738                 dev_err(dev, "priv allocate failed\n");
 739                 return -ENODEV;
 740         }
 741
 742         priv->dev       = dev;
 743         priv->info      = info;
 744         spin_lock_init(&priv->lock);
 745
 746         /*
 747          *      init each module
 748          */
 749         ret = rsnd_gen_probe(pdev, info, priv);
 750         if (ret < 0)
 751                 return ret;
 752
 753         ret = rsnd_scu_probe(pdev, info, priv);
 754         if (ret < 0)
 755                 return ret;
 756
 757         ret = rsnd_adg_probe(pdev, info, priv);
 758         if (ret < 0)
 759                 return ret;
 760
 761         ret = rsnd_ssi_probe(pdev, info, priv);
 762         if (ret < 0)
 763                 return ret;
 764
 765         ret = rsnd_dai_probe(pdev, info, priv);
 766         if (ret < 0)
 767                 return ret;
 768
 769         /*
 770          *      asoc register
 771          */
 772         ret = snd_soc_register_platform(dev, &rsnd_soc_platform);
 773         if (ret < 0) {
 774                 dev_err(dev, "cannot snd soc register\n");
 775                 return ret;
 776         }
 777
 778         ret = snd_soc_register_component(dev, &rsnd_soc_component,
 779                                          priv->daidrv, rsnd_dai_nr(priv));
 780         if (ret < 0) {
 781                 dev_err(dev, "cannot snd dai register\n");
 782                 goto exit_snd_soc;
 783         }
 784
 785         dev_set_drvdata(dev, priv);
 786
 787         pm_runtime_enable(dev);
 788
 789         dev_info(dev, "probed\n");
 790         return ret;
 791
 792 exit_snd_soc:
 793         snd_soc_unregister_platform(dev);
 794
 795         return ret;
 796 }
 797
 798 static int rsnd_remove(struct platform_device *pdev)
 799 {
 800         struct rsnd_priv *priv = dev_get_drvdata(&pdev->dev);
 801
 802         pm_runtime_disable(&pdev->dev);
 803
 804         /*
 805          *      remove each module
 806          */
 807         rsnd_ssi_remove(pdev, priv);
 808         rsnd_adg_remove(pdev, priv);
 809         rsnd_scu_remove(pdev, priv);
 810         rsnd_dai_remove(pdev, priv);
 811         rsnd_gen_remove(pdev, priv);
 812
 813         return 0;
 814 }
 815
 816 static struct platform_driver rsnd_driver = {
 817         .driver = {
 818                 .name   = "rcar_sound",
 819         },
 820         .probe          = rsnd_probe,
 821         .remove         = rsnd_remove,
 822 };
 823 module_platform_driver(rsnd_driver);
 824
 825 MODULE_LICENSE("GPL");
 826 MODULE_DESCRIPTION("Renesas R-Car audio driver");
 827 MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");
 828 MODULE_ALIAS("platform:rcar-pcm-audio");