sound/soc/sh/rcar/core.c

   1 /*
   2  * Renesas R-Car SRU/SCU/SSIU/SSI support
   3  *
   4  * Copyright (C) 2013 Renesas Solutions Corp.
   5  * Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
   6  *
   7  * Based on fsi.c
   8  * Kuninori Morimoto <morimoto.kuninori@renesas.com>
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License version 2 as
  12  * published by the Free Software Foundation.
  13  */
  14
  15 /*
  16  * Renesas R-Car sound device structure
  17  *
  18  * Gen1
  19  *
  20  * SRU          : Sound Routing Unit
  21  *  - SRC       : Sampling Rate Converter
  22  *  - CMD
  23  *    - CTU     : Channel Count Conversion Unit
  24  *    - MIX     : Mixer
  25  *    - DVC     : Digital Volume and Mute Function
  26  *  - SSI       : Serial Sound Interface
  27  *
  28  * Gen2
  29  *
  30  * SCU          : Sampling Rate Converter Unit
  31  *  - SRC       : Sampling Rate Converter
  32  *  - CMD
  33  *   - CTU      : Channel Count Conversion Unit
  34  *   - MIX      : Mixer
  35  *   - DVC      : Digital Volume and Mute Function
  36  * SSIU         : Serial Sound Interface Unit
  37  *  - SSI       : Serial Sound Interface
  38  */
  39
  40 /*
  41  *      driver data Image
  42  *
  43  * rsnd_priv
  44  *   |
  45  *   | ** this depends on Gen1/Gen2
  46  *   |
  47  *   +- gen
  48  *   |
  49  *   | ** these depend on data path
  50  *   | ** gen and platform data control it
  51  *   |
  52  *   +- rdai[0]
  53  *   |   |               sru     ssiu      ssi
  54  *   |   +- playback -> [mod] -> [mod] -> [mod] -> ...
  55  *   |   |
  56  *   |   |               sru     ssiu      ssi
  57  *   |   +- capture  -> [mod] -> [mod] -> [mod] -> ...
  58  *   |
  59  *   +- rdai[1]
  60  *   |   |               sru     ssiu      ssi
  61  *   |   +- playback -> [mod] -> [mod] -> [mod] -> ...
  62  *   |   |
  63  *   |   |               sru     ssiu      ssi
  64  *   |   +- capture  -> [mod] -> [mod] -> [mod] -> ...
  65  *   ...
  66  *   |
  67  *   | ** these control ssi
  68  *   |
  69  *   +- ssi
  70  *   |  |
  71  *   |  +- ssi[0]
  72  *   |  +- ssi[1]
  73  *   |  +- ssi[2]
  74  *   |  ...
  75  *   |
  76  *   | ** these control src
  77  *   |
  78  *   +- src
  79  *      |
  80  *      +- src[0]
  81  *      +- src[1]
  82  *      +- src[2]
  83  *      ...
  84  *
  85  *
  86  * for_each_rsnd_dai(xx, priv, xx)
  87  *  rdai[0] => rdai[1] => rdai[2] => ...
  88  *
  89  * for_each_rsnd_mod(xx, rdai, xx)
  90  *  [mod] => [mod] => [mod] => ...
  91  *
  92  * rsnd_dai_call(xxx, fn )
  93  *  [mod]->fn() -> [mod]->fn() -> [mod]->fn()...
  94  *
  95  */
  96 #include <linux/pm_runtime.h>
  97 #include "rsnd.h"
  98
  99 #define RSND_RATES SNDRV_PCM_RATE_8000_96000
 100 #define RSND_FMTS (SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S16_LE)
 101
 102 static const struct of_device_id rsnd_of_match[] = {
 103         { .compatible = "renesas,rcar_sound-gen1", .data = (void *)RSND_GEN1 },
 104         { .compatible = "renesas,rcar_sound-gen2", .data = (void *)RSND_GEN2 },
 105         { .compatible = "renesas,rcar_sound-gen3", .data = (void *)RSND_GEN2 }, /* gen2 compatible */
 106         {},
 107 };
 108 MODULE_DEVICE_TABLE(of, rsnd_of_match);
 109
 110 /*
 111  *      rsnd_mod functions
 112  */
 113 #ifdef DEBUG
 114 void rsnd_mod_make_sure(struct rsnd_mod *mod, enum rsnd_mod_type type)
 115 {
 116         if (mod->type != type) {
 117                 struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
 118                 struct device *dev = rsnd_priv_to_dev(priv);
 119
 120                 dev_warn(dev, "%s[%d] is not your expected module\n",
 121                          rsnd_mod_name(mod), rsnd_mod_id(mod));
 122         }
 123 }
 124 #endif
 125
 126 char *rsnd_mod_name(struct rsnd_mod *mod)
 127 {
 128         if (!mod || !mod->ops)
 129                 return "unknown";
 130
 131         return mod->ops->name;
 132 }
 133
 134 struct dma_chan *rsnd_mod_dma_req(struct rsnd_dai_stream *io,
 135                                   struct rsnd_mod *mod)
 136 {
 137         if (!mod || !mod->ops || !mod->ops->dma_req)
 138                 return NULL;
 139
 140         return mod->ops->dma_req(io, mod);
 141 }
 142
 143 u32 *rsnd_mod_get_status(struct rsnd_dai_stream *io,
 144                          struct rsnd_mod *mod,
 145                          enum rsnd_mod_type type)
 146 {
 147         return &mod->status;
 148 }
 149
 150 int rsnd_mod_init(struct rsnd_priv *priv,
 151                   struct rsnd_mod *mod,
 152                   struct rsnd_mod_ops *ops,
 153                   struct clk *clk,
 154                   u32* (*get_status)(struct rsnd_dai_stream *io,
 155                                      struct rsnd_mod *mod,
 156                                      enum rsnd_mod_type type),
 157                   enum rsnd_mod_type type,
 158                   int id)
 159 {
 160         int ret = clk_prepare(clk);
 161
 162         if (ret)
 163                 return ret;
 164
 165         mod->id         = id;
 166         mod->ops        = ops;
 167         mod->type       = type;
 168         mod->clk        = clk;
 169         mod->priv       = priv;
 170         mod->get_status = get_status;
 171
 172         return ret;
 173 }
 174
 175 void rsnd_mod_quit(struct rsnd_mod *mod)
 176 {
 177         if (mod->clk)
 178                 clk_unprepare(mod->clk);
 179         mod->clk = NULL;
 180 }
 181
 182 void rsnd_mod_interrupt(struct rsnd_mod *mod,
 183                         void (*callback)(struct rsnd_mod *mod,
 184                                          struct rsnd_dai_stream *io))
 185 {
 186         struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
 187         struct rsnd_dai_stream *io;
 188         struct rsnd_dai *rdai;
 189         int i;
 190
 191         for_each_rsnd_dai(rdai, priv, i) {
 192                 io = &rdai->playback;
 193                 if (mod == io->mod[mod->type])
 194                         callback(mod, io);
 195
 196                 io = &rdai->capture;
 197                 if (mod == io->mod[mod->type])
 198                         callback(mod, io);
 199         }
 200 }
 201
 202 int rsnd_io_is_working(struct rsnd_dai_stream *io)
 203 {
 204         /* see rsnd_dai_stream_init/quit() */
 205         return !!io->substream;
 206 }
 207
 208 void rsnd_set_slot(struct rsnd_dai *rdai,
 209                    int slots, int num)
 210 {
 211         rdai->slots     = slots;
 212         rdai->slots_num = num;
 213 }
 214
 215 int rsnd_get_slot(struct rsnd_dai_stream *io)
 216 {
 217         struct rsnd_dai *rdai = rsnd_io_to_rdai(io);
 218
 219         return rdai->slots;
 220 }
 221
 222 int rsnd_get_slot_num(struct rsnd_dai_stream *io)
 223 {
 224         struct rsnd_dai *rdai = rsnd_io_to_rdai(io);
 225
 226         return rdai->slots_num;
 227 }
 228
 229 int rsnd_runtime_channel_original(struct rsnd_dai_stream *io)
 230 {
 231         struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
 232
 233         return runtime->channels;
 234 }
 235
 236 int rsnd_runtime_channel_after_ctu(struct rsnd_dai_stream *io)
 237 {
 238         int chan = rsnd_runtime_channel_original(io);
 239         struct rsnd_mod *ctu_mod = rsnd_io_to_mod_ctu(io);
 240
 241         if (ctu_mod) {
 242                 u32 converted_chan = rsnd_ctu_converted_channel(ctu_mod);
 243
 244                 if (converted_chan)
 245                         return converted_chan;
 246         }
 247
 248         return chan;
 249 }
 250
 251 int rsnd_runtime_channel_for_ssi(struct rsnd_dai_stream *io)
 252 {
 253         int chan = rsnd_io_is_play(io) ?
 254                 rsnd_runtime_channel_after_ctu(io) :
 255                 rsnd_runtime_channel_original(io);
 256
 257         /* Use Multi SSI */
 258         if (rsnd_runtime_is_ssi_multi(io))
 259                 chan /= rsnd_get_slot_num(io);
 260
 261         /* TDM Extend Mode needs 8ch */
 262         if (chan == 6)
 263                 chan = 8;
 264
 265         return chan;
 266 }
 267
 268 int rsnd_runtime_is_ssi_multi(struct rsnd_dai_stream *io)
 269 {
 270         int slots = rsnd_get_slot_num(io);
 271         int chan = rsnd_io_is_play(io) ?
 272                 rsnd_runtime_channel_after_ctu(io) :
 273                 rsnd_runtime_channel_original(io);
 274
 275         return (chan >= 6) && (slots > 1);
 276 }
 277
 278 int rsnd_runtime_is_ssi_tdm(struct rsnd_dai_stream *io)
 279 {
 280         return rsnd_runtime_channel_for_ssi(io) >= 6;
 281 }
 282
 283 /*
 284  *      ADINR function
 285  */
 286 u32 rsnd_get_adinr_bit(struct rsnd_mod *mod, struct rsnd_dai_stream *io)
 287 {
 288         struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
 289         struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
 290         struct device *dev = rsnd_priv_to_dev(priv);
 291
 292         switch (runtime->sample_bits) {
 293         case 16:
 294                 return 8 << 16;
 295         case 32:
 296                 return 0 << 16;
 297         }
 298
 299         dev_warn(dev, "not supported sample bits\n");
 300
 301         return 0;
 302 }
 303
 304 /*
 305  *      DALIGN function
 306  */
 307 u32 rsnd_get_dalign(struct rsnd_mod *mod, struct rsnd_dai_stream *io)
 308 {
 309         struct rsnd_mod *ssi = rsnd_io_to_mod_ssi(io);
 310         struct rsnd_mod *target;
 311         struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
 312         u32 val = 0x76543210;
 313         u32 mask = ~0;
 314
 315         if (rsnd_io_is_play(io)) {
 316                 struct rsnd_mod *src = rsnd_io_to_mod_src(io);
 317
 318                 target = src ? src : ssi;
 319         } else {
 320                 struct rsnd_mod *cmd = rsnd_io_to_mod_cmd(io);
 321
 322                 target = cmd ? cmd : ssi;
 323         }
 324
 325         mask <<= runtime->channels * 4;
 326         val = val & mask;
 327
 328         switch (runtime->sample_bits) {
 329         case 16:
 330                 val |= 0x67452301 & ~mask;
 331                 break;
 332         case 32:
 333                 val |= 0x76543210 & ~mask;
 334                 break;
 335         }
 336
 337         /*
 338          * exchange channeles on SRC if possible,
 339          * otherwise, R/L volume settings on DVC
 340          * changes inverted channels
 341          */
 342         if (mod == target)
 343                 return val;
 344         else
 345                 return 0x76543210;
 346 }
 347
 348 /*
 349  *      rsnd_dai functions
 350  */
 351 #define rsnd_mod_call(idx, io, func, param...)                  \
 352 ({                                                              \
 353         struct rsnd_priv *priv = rsnd_mod_to_priv(mod);         \
 354         struct rsnd_mod *mod = (io)->mod[idx];                  \
 355         struct device *dev = rsnd_priv_to_dev(priv);            \
 356         u32 *status = mod->get_status(io, mod, idx);                    \
 357         u32 mask = 0xF << __rsnd_mod_shift_##func;                      \
 358         u8 val  = (*status >> __rsnd_mod_shift_##func) & 0xF;           \
 359         u8 add  = ((val + __rsnd_mod_add_##func) & 0xF);                \
 360         int ret = 0;                                                    \
 361         int call = (val == __rsnd_mod_call_##func) && (mod)->ops->func; \
 362         if (add == 0xF)                                                 \
 363                 call = 0;                                               \
 364         else                                                            \
 365                 *status = (*status & ~mask) +                           \
 366                         (add << __rsnd_mod_shift_##func);               \
 367         dev_dbg(dev, "%s[%d]\t0x%08x %s\n",                             \
 368                 rsnd_mod_name(mod), rsnd_mod_id(mod),                   \
 369                 *status, call ? #func : "");                            \
 370         if (call)                                                       \
 371                 ret = (mod)->ops->func(mod, io, param);                 \
 372         if (ret)                                                        \
 373                 dev_dbg(dev, "%s[%d] : rsnd_mod_call error %d\n",       \
 374                         rsnd_mod_name(mod), rsnd_mod_id(mod), ret);     \
 375         ret;                                                            \
 376 })
 377
 378 static enum rsnd_mod_type rsnd_mod_sequence[][RSND_MOD_MAX] = {
 379         {
 380                 /* CAPTURE */
 381                 RSND_MOD_AUDMAPP,
 382                 RSND_MOD_AUDMA,
 383                 RSND_MOD_DVC,
 384                 RSND_MOD_MIX,
 385                 RSND_MOD_CTU,
 386                 RSND_MOD_CMD,
 387                 RSND_MOD_SRC,
 388                 RSND_MOD_SSIU,
 389                 RSND_MOD_SSIM3,
 390                 RSND_MOD_SSIM2,
 391                 RSND_MOD_SSIM1,
 392                 RSND_MOD_SSIP,
 393                 RSND_MOD_SSI,
 394         }, {
 395                 /* PLAYBACK */
 396                 RSND_MOD_AUDMAPP,
 397                 RSND_MOD_AUDMA,
 398                 RSND_MOD_SSIM3,
 399                 RSND_MOD_SSIM2,
 400                 RSND_MOD_SSIM1,
 401                 RSND_MOD_SSIP,
 402                 RSND_MOD_SSI,
 403                 RSND_MOD_SSIU,
 404                 RSND_MOD_DVC,
 405                 RSND_MOD_MIX,
 406                 RSND_MOD_CTU,
 407                 RSND_MOD_CMD,
 408                 RSND_MOD_SRC,
 409         },
 410 };
 411
 412 #define rsnd_dai_call(fn, io, param...)                         \
 413 ({                                                              \
 414         struct rsnd_mod *mod;                                   \
 415         int type, is_play = rsnd_io_is_play(io);                \
 416         int ret = 0, i;                                         \
 417         for (i = 0; i < RSND_MOD_MAX; i++) {                    \
 418                 type = rsnd_mod_sequence[is_play][i];           \
 419                 mod = (io)->mod[type];                          \
 420                 if (!mod)                                       \
 421                         continue;                               \
 422                 ret |= rsnd_mod_call(type, io, fn, param);      \
 423         }                                                       \
 424         ret;                                                    \
 425 })
 426
 427 int rsnd_dai_connect(struct rsnd_mod *mod,
 428                      struct rsnd_dai_stream *io,
 429                      enum rsnd_mod_type type)
 430 {
 431         struct rsnd_priv *priv;
 432         struct device *dev;
 433
 434         if (!mod)
 435                 return -EIO;
 436
 437         if (io->mod[type] == mod)
 438                 return 0;
 439
 440         if (io->mod[type])
 441                 return -EINVAL;
 442
 443         priv = rsnd_mod_to_priv(mod);
 444         dev = rsnd_priv_to_dev(priv);
 445
 446         io->mod[type] = mod;
 447
 448         dev_dbg(dev, "%s[%d] is connected to io (%s)\n",
 449                 rsnd_mod_name(mod), rsnd_mod_id(mod),
 450                 rsnd_io_is_play(io) ? "Playback" : "Capture");
 451
 452         return 0;
 453 }
 454
 455 static void rsnd_dai_disconnect(struct rsnd_mod *mod,
 456                                 struct rsnd_dai_stream *io,
 457                                 enum rsnd_mod_type type)
 458 {
 459         io->mod[type] = NULL;
 460 }
 461
 462 struct rsnd_dai *rsnd_rdai_get(struct rsnd_priv *priv, int id)
 463 {
 464         if ((id < 0) || (id >= rsnd_rdai_nr(priv)))
 465                 return NULL;
 466
 467         return priv->rdai + id;
 468 }
 469
 470 #define rsnd_dai_to_priv(dai) snd_soc_dai_get_drvdata(dai)
 471 static struct rsnd_dai *rsnd_dai_to_rdai(struct snd_soc_dai *dai)
 472 {
 473         struct rsnd_priv *priv = rsnd_dai_to_priv(dai);
 474
 475         return rsnd_rdai_get(priv, dai->id);
 476 }
 477
 478 /*
 479  *      rsnd_soc_dai functions
 480  */
 481 int rsnd_dai_pointer_offset(struct rsnd_dai_stream *io, int additional)
 482 {
 483         struct snd_pcm_substream *substream = io->substream;
 484         struct snd_pcm_runtime *runtime = substream->runtime;
 485         int pos = io->byte_pos + additional;
 486
 487         pos %= (runtime->periods * io->byte_per_period);
 488
 489         return pos;
 490 }
 491
 492 bool rsnd_dai_pointer_update(struct rsnd_dai_stream *io, int byte)
 493 {
 494         io->byte_pos += byte;
 495
 496         if (io->byte_pos >= io->next_period_byte) {
 497                 struct snd_pcm_substream *substream = io->substream;
 498                 struct snd_pcm_runtime *runtime = substream->runtime;
 499
 500                 io->period_pos++;
 501                 io->next_period_byte += io->byte_per_period;
 502
 503                 if (io->period_pos >= runtime->periods) {
 504                         io->byte_pos = 0;
 505                         io->period_pos = 0;
 506                         io->next_period_byte = io->byte_per_period;
 507                 }
 508
 509                 return true;
 510         }
 511
 512         return false;
 513 }
 514
 515 void rsnd_dai_period_elapsed(struct rsnd_dai_stream *io)
 516 {
 517         struct snd_pcm_substream *substream = io->substream;
 518
 519         /*
 520          * this function should be called...
 521          *
 522          * - if rsnd_dai_pointer_update() returns true
 523          * - without spin lock
 524          */
 525
 526         snd_pcm_period_elapsed(substream);
 527 }
 528
 529 static void rsnd_dai_stream_init(struct rsnd_dai_stream *io,
 530                                 struct snd_pcm_substream *substream)
 531 {
 532         struct snd_pcm_runtime *runtime = substream->runtime;
 533
 534         io->substream           = substream;
 535         io->byte_pos            = 0;
 536         io->period_pos          = 0;
 537         io->byte_per_period     = runtime->period_size *
 538                                   runtime->channels *
 539                                   samples_to_bytes(runtime, 1);
 540         io->next_period_byte    = io->byte_per_period;
 541 }
 542
 543 static void rsnd_dai_stream_quit(struct rsnd_dai_stream *io)
 544 {
 545         io->substream           = NULL;
 546 }
 547
 548 static
 549 struct snd_soc_dai *rsnd_substream_to_dai(struct snd_pcm_substream *substream)
 550 {
 551         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 552
 553         return  rtd->cpu_dai;
 554 }
 555
 556 static
 557 struct rsnd_dai_stream *rsnd_rdai_to_io(struct rsnd_dai *rdai,
 558                                         struct snd_pcm_substream *substream)
 559 {
 560         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 561                 return &rdai->playback;
 562         else
 563                 return &rdai->capture;
 564 }
 565
 566 static int rsnd_soc_dai_trigger(struct snd_pcm_substream *substream, int cmd,
 567                             struct snd_soc_dai *dai)
 568 {
 569         struct rsnd_priv *priv = rsnd_dai_to_priv(dai);
 570         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
 571         struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream);
 572         int ret;
 573         unsigned long flags;
 574
 575         spin_lock_irqsave(&priv->lock, flags);
 576
 577         switch (cmd) {
 578         case SNDRV_PCM_TRIGGER_START:
 579         case SNDRV_PCM_TRIGGER_RESUME:
 580                 rsnd_dai_stream_init(io, substream);
 581
 582                 ret = rsnd_dai_call(init, io, priv);
 583                 if (ret < 0)
 584                         goto dai_trigger_end;
 585
 586                 ret = rsnd_dai_call(start, io, priv);
 587                 if (ret < 0)
 588                         goto dai_trigger_end;
 589
 590                 ret = rsnd_dai_call(irq, io, priv, 1);
 591                 if (ret < 0)
 592                         goto dai_trigger_end;
 593
 594                 break;
 595         case SNDRV_PCM_TRIGGER_STOP:
 596         case SNDRV_PCM_TRIGGER_SUSPEND:
 597                 ret = rsnd_dai_call(irq, io, priv, 0);
 598
 599                 ret |= rsnd_dai_call(stop, io, priv);
 600
 601                 ret |= rsnd_dai_call(quit, io, priv);
 602
 603                 rsnd_dai_stream_quit(io);
 604                 break;
 605         default:
 606                 ret = -EINVAL;
 607         }
 608
 609 dai_trigger_end:
 610         spin_unlock_irqrestore(&priv->lock, flags);
 611
 612         return ret;
 613 }
 614
 615 static int rsnd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
 616 {
 617         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
 618
 619         /* set master/slave audio interface */
 620         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 621         case SND_SOC_DAIFMT_CBM_CFM:
 622                 rdai->clk_master = 0;
 623                 break;
 624         case SND_SOC_DAIFMT_CBS_CFS:
 625                 rdai->clk_master = 1; /* codec is slave, cpu is master */
 626                 break;
 627         default:
 628                 return -EINVAL;
 629         }
 630
 631         /* set format */
 632         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 633         case SND_SOC_DAIFMT_I2S:
 634                 rdai->sys_delay = 0;
 635                 rdai->data_alignment = 0;
 636                 rdai->frm_clk_inv = 0;
 637                 break;
 638         case SND_SOC_DAIFMT_LEFT_J:
 639                 rdai->sys_delay = 1;
 640                 rdai->data_alignment = 0;
 641                 rdai->frm_clk_inv = 1;
 642                 break;
 643         case SND_SOC_DAIFMT_RIGHT_J:
 644                 rdai->sys_delay = 1;
 645                 rdai->data_alignment = 1;
 646                 rdai->frm_clk_inv = 1;
 647                 break;
 648         }
 649
 650         /* set clock inversion */
 651         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
 652         case SND_SOC_DAIFMT_NB_IF:
 653                 rdai->bit_clk_inv =  rdai->bit_clk_inv;
 654                 rdai->frm_clk_inv = !rdai->frm_clk_inv;
 655                 break;
 656         case SND_SOC_DAIFMT_IB_NF:
 657                 rdai->bit_clk_inv = !rdai->bit_clk_inv;
 658                 rdai->frm_clk_inv =  rdai->frm_clk_inv;
 659                 break;
 660         case SND_SOC_DAIFMT_IB_IF:
 661                 rdai->bit_clk_inv = !rdai->bit_clk_inv;
 662                 rdai->frm_clk_inv = !rdai->frm_clk_inv;
 663                 break;
 664         case SND_SOC_DAIFMT_NB_NF:
 665         default:
 666                 break;
 667         }
 668
 669         return 0;
 670 }
 671
 672 static int rsnd_soc_set_dai_tdm_slot(struct snd_soc_dai *dai,
 673                                      u32 tx_mask, u32 rx_mask,
 674                                      int slots, int slot_width)
 675 {
 676         struct rsnd_priv *priv = rsnd_dai_to_priv(dai);
 677         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
 678         struct device *dev = rsnd_priv_to_dev(priv);
 679
 680         switch (slots) {
 681         case 6:
 682                 /* TDM Extend Mode */
 683                 rsnd_set_slot(rdai, slots, 1);
 684                 break;
 685         default:
 686                 dev_err(dev, "unsupported TDM slots (%d)\n", slots);
 687                 return -EINVAL;
 688         }
 689
 690         return 0;
 691 }
 692
 693 static const struct snd_soc_dai_ops rsnd_soc_dai_ops = {
 694         .trigger        = rsnd_soc_dai_trigger,
 695         .set_fmt        = rsnd_soc_dai_set_fmt,
 696         .set_tdm_slot   = rsnd_soc_set_dai_tdm_slot,
 697 };
 698
 699 void rsnd_parse_connect_common(struct rsnd_dai *rdai,
 700                 struct rsnd_mod* (*mod_get)(struct rsnd_priv *priv, int id),
 701                 struct device_node *node,
 702                 struct device_node *playback,
 703                 struct device_node *capture)
 704 {
 705         struct rsnd_priv *priv = rsnd_rdai_to_priv(rdai);
 706         struct device_node *np;
 707         struct rsnd_mod *mod;
 708         int i;
 709
 710         if (!node)
 711                 return;
 712
 713         i = 0;
 714         for_each_child_of_node(node, np) {
 715                 mod = mod_get(priv, i);
 716                 if (np == playback)
 717                         rsnd_dai_connect(mod, &rdai->playback, mod->type);
 718                 if (np == capture)
 719                         rsnd_dai_connect(mod, &rdai->capture, mod->type);
 720                 i++;
 721         }
 722
 723         of_node_put(node);
 724 }
 725
 726 static int rsnd_dai_probe(struct rsnd_priv *priv)
 727 {
 728         struct device_node *dai_node;
 729         struct device_node *dai_np;
 730         struct device_node *playback, *capture;
 731         struct rsnd_dai_stream *io_playback;
 732         struct rsnd_dai_stream *io_capture;
 733         struct snd_soc_dai_driver *rdrv, *drv;
 734         struct rsnd_dai *rdai;
 735         struct device *dev = rsnd_priv_to_dev(priv);
 736         int nr, dai_i, io_i;
 737         int ret;
 738
 739         dai_node = rsnd_dai_of_node(priv);
 740         nr = of_get_child_count(dai_node);
 741         if (!nr) {
 742                 ret = -EINVAL;
 743                 goto rsnd_dai_probe_done;
 744         }
 745
 746         rdrv = devm_kzalloc(dev, sizeof(*rdrv) * nr, GFP_KERNEL);
 747         rdai = devm_kzalloc(dev, sizeof(*rdai) * nr, GFP_KERNEL);
 748         if (!rdrv || !rdai) {
 749                 ret = -ENOMEM;
 750                 goto rsnd_dai_probe_done;
 751         }
 752
 753         priv->rdai_nr   = nr;
 754         priv->daidrv    = rdrv;
 755         priv->rdai      = rdai;
 756
 757         /*
 758          * parse all dai
 759          */
 760         dai_i = 0;
 761         for_each_child_of_node(dai_node, dai_np) {
 762                 rdai            = rsnd_rdai_get(priv, dai_i);
 763                 drv             = rdrv + dai_i;
 764                 io_playback     = &rdai->playback;
 765                 io_capture      = &rdai->capture;
 766
 767                 snprintf(rdai->name, RSND_DAI_NAME_SIZE, "rsnd-dai.%d", dai_i);
 768
 769                 rdai->priv      = priv;
 770                 drv->name       = rdai->name;
 771                 drv->ops        = &rsnd_soc_dai_ops;
 772
 773                 snprintf(rdai->playback.name, RSND_DAI_NAME_SIZE,
 774                          "DAI%d Playback", dai_i);
 775                 drv->playback.rates             = RSND_RATES;
 776                 drv->playback.formats           = RSND_FMTS;
 777                 drv->playback.channels_min      = 2;
 778                 drv->playback.channels_max      = 6;
 779                 drv->playback.stream_name       = rdai->playback.name;
 780
 781                 snprintf(rdai->capture.name, RSND_DAI_NAME_SIZE,
 782                          "DAI%d Capture", dai_i);
 783                 drv->capture.rates              = RSND_RATES;
 784                 drv->capture.formats            = RSND_FMTS;
 785                 drv->capture.channels_min       = 2;
 786                 drv->capture.channels_max       = 6;
 787                 drv->capture.stream_name        = rdai->capture.name;
 788
 789                 rdai->playback.rdai             = rdai;
 790                 rdai->capture.rdai              = rdai;
 791                 rsnd_set_slot(rdai, 2, 1); /* default */
 792
 793                 for (io_i = 0;; io_i++) {
 794                         playback = of_parse_phandle(dai_np, "playback", io_i);
 795                         capture  = of_parse_phandle(dai_np, "capture", io_i);
 796
 797                         if (!playback && !capture)
 798                                 break;
 799
 800                         rsnd_parse_connect_ssi(rdai, playback, capture);
 801                         rsnd_parse_connect_src(rdai, playback, capture);
 802                         rsnd_parse_connect_ctu(rdai, playback, capture);
 803                         rsnd_parse_connect_mix(rdai, playback, capture);
 804                         rsnd_parse_connect_dvc(rdai, playback, capture);
 805
 806                         of_node_put(playback);
 807                         of_node_put(capture);
 808                 }
 809
 810                 dai_i++;
 811
 812                 dev_dbg(dev, "%s (%s/%s)\n", rdai->name,
 813                         rsnd_io_to_mod_ssi(io_playback) ? "play"    : " -- ",
 814                         rsnd_io_to_mod_ssi(io_capture) ? "capture" : "  --   ");
 815         }
 816
 817         ret = 0;
 818
 819 rsnd_dai_probe_done:
 820         of_node_put(dai_node);
 821
 822         return ret;
 823 }
 824
 825 /*
 826  *              pcm ops
 827  */
 828 static struct snd_pcm_hardware rsnd_pcm_hardware = {
 829         .info =         SNDRV_PCM_INFO_INTERLEAVED      |
 830                         SNDRV_PCM_INFO_MMAP             |
 831                         SNDRV_PCM_INFO_MMAP_VALID,
 832         .buffer_bytes_max       = 64 * 1024,
 833         .period_bytes_min       = 32,
 834         .period_bytes_max       = 8192,
 835         .periods_min            = 1,
 836         .periods_max            = 32,
 837         .fifo_size              = 256,
 838 };
 839
 840 static int rsnd_pcm_open(struct snd_pcm_substream *substream)
 841 {
 842         struct snd_pcm_runtime *runtime = substream->runtime;
 843         int ret = 0;
 844
 845         snd_soc_set_runtime_hwparams(substream, &rsnd_pcm_hardware);
 846
 847         ret = snd_pcm_hw_constraint_integer(runtime,
 848                                             SNDRV_PCM_HW_PARAM_PERIODS);
 849
 850         return ret;
 851 }
 852
 853 static int rsnd_hw_params(struct snd_pcm_substream *substream,
 854                          struct snd_pcm_hw_params *hw_params)
 855 {
 856         struct snd_soc_dai *dai = rsnd_substream_to_dai(substream);
 857         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
 858         struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream);
 859         int ret;
 860
 861         ret = rsnd_dai_call(hw_params, io, substream, hw_params);
 862         if (ret)
 863                 return ret;
 864
 865         return snd_pcm_lib_malloc_pages(substream,
 866                                         params_buffer_bytes(hw_params));
 867 }
 868
 869 static snd_pcm_uframes_t rsnd_pointer(struct snd_pcm_substream *substream)
 870 {
 871         struct snd_pcm_runtime *runtime = substream->runtime;
 872         struct snd_soc_dai *dai = rsnd_substream_to_dai(substream);
 873         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
 874         struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream);
 875
 876         return bytes_to_frames(runtime, io->byte_pos);
 877 }
 878
 879 static struct snd_pcm_ops rsnd_pcm_ops = {
 880         .open           = rsnd_pcm_open,
 881         .ioctl          = snd_pcm_lib_ioctl,
 882         .hw_params      = rsnd_hw_params,
 883         .hw_free        = snd_pcm_lib_free_pages,
 884         .pointer        = rsnd_pointer,
 885 };
 886
 887 /*
 888  *              snd_kcontrol
 889  */
 890 #define kcontrol_to_cfg(kctrl) ((struct rsnd_kctrl_cfg *)kctrl->private_value)
 891 static int rsnd_kctrl_info(struct snd_kcontrol *kctrl,
 892                            struct snd_ctl_elem_info *uinfo)
 893 {
 894         struct rsnd_kctrl_cfg *cfg = kcontrol_to_cfg(kctrl);
 895
 896         if (cfg->texts) {
 897                 uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
 898                 uinfo->count = cfg->size;
 899                 uinfo->value.enumerated.items = cfg->max;
 900                 if (uinfo->value.enumerated.item >= cfg->max)
 901                         uinfo->value.enumerated.item = cfg->max - 1;
 902                 strlcpy(uinfo->value.enumerated.name,
 903                         cfg->texts[uinfo->value.enumerated.item],
 904                         sizeof(uinfo->value.enumerated.name));
 905         } else {
 906                 uinfo->count = cfg->size;
 907                 uinfo->value.integer.min = 0;
 908                 uinfo->value.integer.max = cfg->max;
 909                 uinfo->type = (cfg->max == 1) ?
 910                         SNDRV_CTL_ELEM_TYPE_BOOLEAN :
 911                         SNDRV_CTL_ELEM_TYPE_INTEGER;
 912         }
 913
 914         return 0;
 915 }
 916
 917 static int rsnd_kctrl_get(struct snd_kcontrol *kctrl,
 918                           struct snd_ctl_elem_value *uc)
 919 {
 920         struct rsnd_kctrl_cfg *cfg = kcontrol_to_cfg(kctrl);
 921         int i;
 922
 923         for (i = 0; i < cfg->size; i++)
 924                 if (cfg->texts)
 925                         uc->value.enumerated.item[i] = cfg->val[i];
 926                 else
 927                         uc->value.integer.value[i] = cfg->val[i];
 928
 929         return 0;
 930 }
 931
 932 static int rsnd_kctrl_put(struct snd_kcontrol *kctrl,
 933                           struct snd_ctl_elem_value *uc)
 934 {
 935         struct rsnd_mod *mod = snd_kcontrol_chip(kctrl);
 936         struct rsnd_kctrl_cfg *cfg = kcontrol_to_cfg(kctrl);
 937         int i, change = 0;
 938
 939         for (i = 0; i < cfg->size; i++) {
 940                 if (cfg->texts) {
 941                         change |= (uc->value.enumerated.item[i] != cfg->val[i]);
 942                         cfg->val[i] = uc->value.enumerated.item[i];
 943                 } else {
 944                         change |= (uc->value.integer.value[i] != cfg->val[i]);
 945                         cfg->val[i] = uc->value.integer.value[i];
 946                 }
 947         }
 948
 949         if (change && cfg->update)
 950                 cfg->update(cfg->io, mod);
 951
 952         return change;
 953 }
 954
 955 static int __rsnd_kctrl_new(struct rsnd_mod *mod,
 956                             struct rsnd_dai_stream *io,
 957                             struct snd_soc_pcm_runtime *rtd,
 958                             const unsigned char *name,
 959                             struct rsnd_kctrl_cfg *cfg,
 960                             void (*update)(struct rsnd_dai_stream *io,
 961                                            struct rsnd_mod *mod))
 962 {
 963         struct snd_card *card = rtd->card->snd_card;
 964         struct snd_kcontrol *kctrl;
 965         struct snd_kcontrol_new knew = {
 966                 .iface          = SNDRV_CTL_ELEM_IFACE_MIXER,
 967                 .name           = name,
 968                 .info           = rsnd_kctrl_info,
 969                 .index          = rtd->num,
 970                 .get            = rsnd_kctrl_get,
 971                 .put            = rsnd_kctrl_put,
 972                 .private_value  = (unsigned long)cfg,
 973         };
 974         int ret;
 975
 976         kctrl = snd_ctl_new1(&knew, mod);
 977         if (!kctrl)
 978                 return -ENOMEM;
 979
 980         ret = snd_ctl_add(card, kctrl);
 981         if (ret < 0) {
 982                 snd_ctl_free_one(kctrl);
 983                 return ret;
 984         }
 985
 986         cfg->update = update;
 987         cfg->card = card;
 988         cfg->kctrl = kctrl;
 989         cfg->io = io;
 990
 991         return 0;
 992 }
 993
 994 void _rsnd_kctrl_remove(struct rsnd_kctrl_cfg *cfg)
 995 {
 996         snd_ctl_remove(cfg->card, cfg->kctrl);
 997 }
 998
 999 int rsnd_kctrl_new_m(struct rsnd_mod *mod,
1000                      struct rsnd_dai_stream *io,
1001                      struct snd_soc_pcm_runtime *rtd,
1002                      const unsigned char *name,
1003                      void (*update)(struct rsnd_dai_stream *io,
1004                                     struct rsnd_mod *mod),
1005                      struct rsnd_kctrl_cfg_m *_cfg,
1006                      int ch_size,
1007                      u32 max)
1008 {
1009         if (ch_size > RSND_MAX_CHANNELS)
1010                 return -EINVAL;
1011
1012         _cfg->cfg.max   = max;
1013         _cfg->cfg.size  = ch_size;
1014         _cfg->cfg.val   = _cfg->val;
1015         return __rsnd_kctrl_new(mod, io, rtd, name, &_cfg->cfg, update);
1016 }
1017
1018 int rsnd_kctrl_new_s(struct rsnd_mod *mod,
1019                      struct rsnd_dai_stream *io,
1020                      struct snd_soc_pcm_runtime *rtd,
1021                      const unsigned char *name,
1022                      void (*update)(struct rsnd_dai_stream *io,
1023                                     struct rsnd_mod *mod),
1024                      struct rsnd_kctrl_cfg_s *_cfg,
1025                      u32 max)
1026 {
1027         _cfg->cfg.max   = max;
1028         _cfg->cfg.size  = 1;
1029         _cfg->cfg.val   = &_cfg->val;
1030         return __rsnd_kctrl_new(mod, io, rtd, name, &_cfg->cfg, update);
1031 }
1032
1033 int rsnd_kctrl_new_e(struct rsnd_mod *mod,
1034                      struct rsnd_dai_stream *io,
1035                      struct snd_soc_pcm_runtime *rtd,
1036                      const unsigned char *name,
1037                      struct rsnd_kctrl_cfg_s *_cfg,
1038                      void (*update)(struct rsnd_dai_stream *io,
1039                                     struct rsnd_mod *mod),
1040                      const char * const *texts,
1041                      u32 max)
1042 {
1043         _cfg->cfg.max   = max;
1044         _cfg->cfg.size  = 1;
1045         _cfg->cfg.val   = &_cfg->val;
1046         _cfg->cfg.texts = texts;
1047         return __rsnd_kctrl_new(mod, io, rtd, name, &_cfg->cfg, update);
1048 }
1049
1050 /*
1051  *              snd_soc_platform
1052  */
1053
1054 #define PREALLOC_BUFFER         (32 * 1024)
1055 #define PREALLOC_BUFFER_MAX     (32 * 1024)
1056
1057 static int rsnd_pcm_new(struct snd_soc_pcm_runtime *rtd)
1058 {
1059         struct snd_soc_dai *dai = rtd->cpu_dai;
1060         struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
1061         int ret;
1062
1063         ret = rsnd_dai_call(pcm_new, &rdai->playback, rtd);
1064         if (ret)
1065                 return ret;
1066
1067         ret = rsnd_dai_call(pcm_new, &rdai->capture, rtd);
1068         if (ret)
1069                 return ret;
1070
1071         return snd_pcm_lib_preallocate_pages_for_all(
1072                 rtd->pcm,
1073                 SNDRV_DMA_TYPE_DEV,
1074                 rtd->card->snd_card->dev,
1075                 PREALLOC_BUFFER, PREALLOC_BUFFER_MAX);
1076 }
1077
1078 static struct snd_soc_platform_driver rsnd_soc_platform = {
1079         .ops            = &rsnd_pcm_ops,
1080         .pcm_new        = rsnd_pcm_new,
1081 };
1082
1083 static const struct snd_soc_component_driver rsnd_soc_component = {
1084         .name           = "rsnd",
1085 };
1086
1087 static int rsnd_rdai_continuance_probe(struct rsnd_priv *priv,
1088                                        struct rsnd_dai_stream *io)
1089 {
1090         int ret;
1091
1092         ret = rsnd_dai_call(probe, io, priv);
1093         if (ret == -EAGAIN) {
1094                 struct rsnd_mod *ssi_mod = rsnd_io_to_mod_ssi(io);
1095                 int i;
1096
1097                 /*
1098                  * Fallback to PIO mode
1099                  */
1100
1101                 /*
1102                  * call "remove" for SSI/SRC/DVC
1103                  * SSI will be switch to PIO mode if it was DMA mode
1104                  * see
1105                  *      rsnd_dma_init()
1106                  *      rsnd_ssi_fallback()
1107                  */
1108                 rsnd_dai_call(remove, io, priv);
1109
1110                 /*
1111                  * remove all mod from io
1112                  * and, re connect ssi
1113                  */
1114                 for (i = 0; i < RSND_MOD_MAX; i++)
1115                         rsnd_dai_disconnect((io)->mod[i], io, i);
1116                 rsnd_dai_connect(ssi_mod, io, RSND_MOD_SSI);
1117
1118                 /*
1119                  * fallback
1120                  */
1121                 rsnd_dai_call(fallback, io, priv);
1122
1123                 /*
1124                  * retry to "probe".
1125                  * DAI has SSI which is PIO mode only now.
1126                  */
1127                 ret = rsnd_dai_call(probe, io, priv);
1128         }
1129
1130         return ret;
1131 }
1132
1133 /*
1134  *      rsnd probe
1135  */
1136 static int rsnd_probe(struct platform_device *pdev)
1137 {
1138         struct rsnd_priv *priv;
1139         struct device *dev = &pdev->dev;
1140         struct rsnd_dai *rdai;
1141         int (*probe_func[])(struct rsnd_priv *priv) = {
1142                 rsnd_gen_probe,
1143                 rsnd_dma_probe,
1144                 rsnd_ssi_probe,
1145                 rsnd_ssiu_probe,
1146                 rsnd_src_probe,
1147                 rsnd_ctu_probe,
1148                 rsnd_mix_probe,
1149                 rsnd_dvc_probe,
1150                 rsnd_cmd_probe,
1151                 rsnd_adg_probe,
1152                 rsnd_dai_probe,
1153         };
1154         int ret, i;
1155
1156         /*
1157          *      init priv data
1158          */
1159         priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
1160         if (!priv) {
1161                 dev_err(dev, "priv allocate failed\n");
1162                 return -ENODEV;
1163         }
1164
1165         priv->pdev      = pdev;
1166         priv->flags     = (unsigned long)of_device_get_match_data(dev);
1167         spin_lock_init(&priv->lock);
1168
1169         /*
1170          *      init each module
1171          */
1172         for (i = 0; i < ARRAY_SIZE(probe_func); i++) {
1173                 ret = probe_func[i](priv);
1174                 if (ret)
1175                         return ret;
1176         }
1177
1178         for_each_rsnd_dai(rdai, priv, i) {
1179                 ret = rsnd_rdai_continuance_probe(priv, &rdai->playback);
1180                 if (ret)
1181                         goto exit_snd_probe;
1182
1183                 ret = rsnd_rdai_continuance_probe(priv, &rdai->capture);
1184                 if (ret)
1185                         goto exit_snd_probe;
1186         }
1187
1188         dev_set_drvdata(dev, priv);
1189
1190         /*
1191          *      asoc register
1192          */
1193         ret = snd_soc_register_platform(dev, &rsnd_soc_platform);
1194         if (ret < 0) {
1195                 dev_err(dev, "cannot snd soc register\n");
1196                 return ret;
1197         }
1198
1199         ret = snd_soc_register_component(dev, &rsnd_soc_component,
1200                                          priv->daidrv, rsnd_rdai_nr(priv));
1201         if (ret < 0) {
1202                 dev_err(dev, "cannot snd dai register\n");
1203                 goto exit_snd_soc;
1204         }
1205
1206         pm_runtime_enable(dev);
1207
1208         dev_info(dev, "probed\n");
1209         return ret;
1210
1211 exit_snd_soc:
1212         snd_soc_unregister_platform(dev);
1213 exit_snd_probe:
1214         for_each_rsnd_dai(rdai, priv, i) {
1215                 rsnd_dai_call(remove, &rdai->playback, priv);
1216                 rsnd_dai_call(remove, &rdai->capture, priv);
1217         }
1218
1219         return ret;
1220 }
1221
1222 static int rsnd_remove(struct platform_device *pdev)
1223 {
1224         struct rsnd_priv *priv = dev_get_drvdata(&pdev->dev);
1225         struct rsnd_dai *rdai;
1226         void (*remove_func[])(struct rsnd_priv *priv) = {
1227                 rsnd_ssi_remove,
1228                 rsnd_ssiu_remove,
1229                 rsnd_src_remove,
1230                 rsnd_ctu_remove,
1231                 rsnd_mix_remove,
1232                 rsnd_dvc_remove,
1233                 rsnd_cmd_remove,
1234                 rsnd_adg_remove,
1235         };
1236         int ret = 0, i;
1237
1238         pm_runtime_disable(&pdev->dev);
1239
1240         for_each_rsnd_dai(rdai, priv, i) {
1241                 ret |= rsnd_dai_call(remove, &rdai->playback, priv);
1242                 ret |= rsnd_dai_call(remove, &rdai->capture, priv);
1243         }
1244
1245         for (i = 0; i < ARRAY_SIZE(remove_func); i++)
1246                 remove_func[i](priv);
1247
1248         snd_soc_unregister_component(&pdev->dev);
1249         snd_soc_unregister_platform(&pdev->dev);
1250
1251         return ret;
1252 }
1253
1254 static struct platform_driver rsnd_driver = {
1255         .driver = {
1256                 .name   = "rcar_sound",
1257                 .of_match_table = rsnd_of_match,
1258         },
1259         .probe          = rsnd_probe,
1260         .remove         = rsnd_remove,
1261 };
1262 module_platform_driver(rsnd_driver);
1263
1264 MODULE_LICENSE("GPL");
1265 MODULE_DESCRIPTION("Renesas R-Car audio driver");
1266 MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");
1267 MODULE_ALIAS("platform:rcar-pcm-audio");