sound/soc/generic/audio-graph-card.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 //
   3 // ASoC audio graph sound card support
   4 //
   5 // Copyright (C) 2016 Renesas Solutions Corp.
   6 // Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
   7 //
   8 // based on ${LINUX}/sound/soc/generic/simple-card.c
   9
  10 #include <linux/clk.h>
  11 #include <linux/device.h>
  12 #include <linux/gpio.h>
  13 #include <linux/gpio/consumer.h>
  14 #include <linux/module.h>
  15 #include <linux/of.h>
  16 #include <linux/of_device.h>
  17 #include <linux/of_gpio.h>
  18 #include <linux/of_graph.h>
  19 #include <linux/platform_device.h>
  20 #include <linux/string.h>
  21 #include <sound/graph_card.h>
  22
  23 #define DPCM_SELECTABLE 1
  24
  25 #define PREFIX  "audio-graph-card,"
  26
  27 static int graph_outdrv_event(struct snd_soc_dapm_widget *w,
  28                               struct snd_kcontrol *kcontrol,
  29                               int event)
  30 {
  31         struct snd_soc_dapm_context *dapm = w->dapm;
  32         struct asoc_simple_priv *priv = snd_soc_card_get_drvdata(dapm->card);
  33
  34         switch (event) {
  35         case SND_SOC_DAPM_POST_PMU:
  36                 gpiod_set_value_cansleep(priv->pa_gpio, 1);
  37                 break;
  38         case SND_SOC_DAPM_PRE_PMD:
  39                 gpiod_set_value_cansleep(priv->pa_gpio, 0);
  40                 break;
  41         default:
  42                 return -EINVAL;
  43         }
  44
  45         return 0;
  46 }
  47
  48 static const struct snd_soc_dapm_widget graph_dapm_widgets[] = {
  49         SND_SOC_DAPM_OUT_DRV_E("Amplifier", SND_SOC_NOPM,
  50                                0, 0, NULL, 0, graph_outdrv_event,
  51                                SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD),
  52 };
  53
  54 static const struct snd_soc_ops graph_ops = {
  55         .startup        = asoc_simple_startup,
  56         .shutdown       = asoc_simple_shutdown,
  57         .hw_params      = asoc_simple_hw_params,
  58 };
  59
  60 static int graph_get_dai_id(struct device_node *ep)
  61 {
  62         struct device_node *node;
  63         struct device_node *endpoint;
  64         struct of_endpoint info;
  65         int i, id;
  66         const u32 *reg;
  67         int ret;
  68
  69         /* use driver specified DAI ID if exist */
  70         ret = snd_soc_get_dai_id(ep);
  71         if (ret != -ENOTSUPP)
  72                 return ret;
  73
  74         /* use endpoint/port reg if exist */
  75         ret = of_graph_parse_endpoint(ep, &info);
  76         if (ret == 0) {
  77                 /*
  78                  * Because it will count port/endpoint if it doesn't have "reg".
  79                  * But, we can't judge whether it has "no reg", or "reg = <0>"
  80                  * only of_graph_parse_endpoint().
  81                  * We need to check "reg" property
  82                  */
  83                 if (of_get_property(ep,   "reg", NULL))
  84                         return info.id;
  85
  86                 node = of_get_parent(ep);
  87                 reg = of_get_property(node, "reg", NULL);
  88                 of_node_put(node);
  89                 if (reg)
  90                         return info.port;
  91         }
  92         node = of_graph_get_port_parent(ep);
  93
  94         /*
  95          * Non HDMI sound case, counting port/endpoint on its DT
  96          * is enough. Let's count it.
  97          */
  98         i = 0;
  99         id = -1;
 100         for_each_endpoint_of_node(node, endpoint) {
 101                 if (endpoint == ep)
 102                         id = i;
 103                 i++;
 104         }
 105
 106         of_node_put(node);
 107
 108         if (id < 0)
 109                 return -ENODEV;
 110
 111         return id;
 112 }
 113
 114 static bool soc_component_is_pcm(struct snd_soc_dai_link_component *dlc)
 115 {
 116         struct snd_soc_dai *dai = snd_soc_find_dai_with_mutex(dlc);
 117
 118         if (dai && (dai->component->driver->pcm_construct ||
 119                     dai->driver->pcm_new))
 120                 return true;
 121
 122         return false;
 123 }
 124
 125 static int asoc_simple_parse_dai(struct device_node *ep,
 126                                  struct snd_soc_dai_link_component *dlc,
 127                                  int *is_single_link)
 128 {
 129         struct device_node *node;
 130         struct of_phandle_args args;
 131         int ret;
 132
 133         if (!ep)
 134                 return 0;
 135
 136         node = of_graph_get_port_parent(ep);
 137
 138         /* Get dai->name */
 139         args.np         = node;
 140         args.args[0]    = graph_get_dai_id(ep);
 141         args.args_count = (of_graph_get_endpoint_count(node) > 1);
 142
 143         /*
 144          * FIXME
 145          *
 146          * Here, dlc->dai_name is pointer to CPU/Codec DAI name.
 147          * If user unbinded CPU or Codec driver, but not for Sound Card,
 148          * dlc->dai_name is keeping unbinded CPU or Codec
 149          * driver's pointer.
 150          *
 151          * If user re-bind CPU or Codec driver again, ALSA SoC will try
 152          * to rebind Card via snd_soc_try_rebind_card(), but because of
 153          * above reason, it might can't bind Sound Card.
 154          * Because Sound Card is pointing to released dai_name pointer.
 155          *
 156          * To avoid this rebind Card issue,
 157          * 1) It needs to alloc memory to keep dai_name eventhough
 158          *    CPU or Codec driver was unbinded, or
 159          * 2) user need to rebind Sound Card everytime
 160          *    if he unbinded CPU or Codec.
 161          */
 162         ret = snd_soc_get_dai_name(&args, &dlc->dai_name);
 163         if (ret < 0)
 164                 return ret;
 165
 166         dlc->of_node = node;
 167
 168         if (is_single_link)
 169                 *is_single_link = of_graph_get_endpoint_count(node) == 1;
 170
 171         return 0;
 172 }
 173
 174 static void graph_parse_convert(struct device *dev,
 175                                 struct device_node *ep,
 176                                 struct asoc_simple_data *adata)
 177 {
 178         struct device_node *top = dev->of_node;
 179         struct device_node *port = of_get_parent(ep);
 180         struct device_node *ports = of_get_parent(port);
 181         struct device_node *node = of_graph_get_port_parent(ep);
 182
 183         asoc_simple_parse_convert(dev, top,   NULL,   adata);
 184         asoc_simple_parse_convert(dev, node,  PREFIX, adata);
 185         asoc_simple_parse_convert(dev, ports, NULL,   adata);
 186         asoc_simple_parse_convert(dev, port,  NULL,   adata);
 187         asoc_simple_parse_convert(dev, ep,    NULL,   adata);
 188
 189         of_node_put(port);
 190         of_node_put(ports);
 191         of_node_put(node);
 192 }
 193
 194 static void graph_parse_mclk_fs(struct device_node *top,
 195                                 struct device_node *ep,
 196                                 struct simple_dai_props *props)
 197 {
 198         struct device_node *port        = of_get_parent(ep);
 199         struct device_node *ports       = of_get_parent(port);
 200         struct device_node *node        = of_graph_get_port_parent(ep);
 201
 202         of_property_read_u32(top,       "mclk-fs", &props->mclk_fs);
 203         of_property_read_u32(ports,     "mclk-fs", &props->mclk_fs);
 204         of_property_read_u32(port,      "mclk-fs", &props->mclk_fs);
 205         of_property_read_u32(ep,        "mclk-fs", &props->mclk_fs);
 206
 207         of_node_put(port);
 208         of_node_put(ports);
 209         of_node_put(node);
 210 }
 211
 212 static int graph_dai_link_of_dpcm(struct asoc_simple_priv *priv,
 213                                   struct device_node *cpu_ep,
 214                                   struct device_node *codec_ep,
 215                                   struct link_info *li,
 216                                   int dup_codec)
 217 {
 218         struct device *dev = simple_priv_to_dev(priv);
 219         struct snd_soc_card *card = simple_priv_to_card(priv);
 220         struct snd_soc_dai_link *dai_link = simple_priv_to_link(priv, li->link);
 221         struct simple_dai_props *dai_props = simple_priv_to_props(priv, li->link);
 222         struct device_node *top = dev->of_node;
 223         struct device_node *ep = li->cpu ? cpu_ep : codec_ep;
 224         struct device_node *port;
 225         struct device_node *ports;
 226         struct device_node *node;
 227         struct asoc_simple_dai *dai;
 228         struct snd_soc_dai_link_component *cpus = dai_link->cpus;
 229         struct snd_soc_dai_link_component *codecs = dai_link->codecs;
 230         int ret;
 231
 232         /*
 233          * Codec endpoint can be NULL for pluggable audio HW.
 234          * Platform DT can populate the Codec endpoint depending on the
 235          * plugged HW.
 236          */
 237         if (!li->cpu && !codec_ep)
 238                 return 0;
 239
 240         /* Do it all CPU endpoint, and 1st Codec endpoint */
 241         if (!li->cpu && dup_codec)
 242                 return 0;
 243
 244         port    = of_get_parent(ep);
 245         ports   = of_get_parent(port);
 246         node    = of_graph_get_port_parent(ep);
 247
 248         li->link++;
 249
 250         dev_dbg(dev, "link_of DPCM (%pOF)\n", ep);
 251
 252         if (li->cpu) {
 253                 int is_single_links = 0;
 254
 255                 /* Codec is dummy */
 256                 codecs->of_node         = NULL;
 257                 codecs->dai_name        = "snd-soc-dummy-dai";
 258                 codecs->name            = "snd-soc-dummy";
 259
 260                 /* FE settings */
 261                 dai_link->dynamic               = 1;
 262                 dai_link->dpcm_merged_format    = 1;
 263
 264                 dai =
 265                 dai_props->cpu_dai      = &priv->dais[li->dais++];
 266
 267                 ret = asoc_simple_parse_cpu(ep, dai_link, &is_single_links);
 268                 if (ret)
 269                         goto out_put_node;
 270
 271                 ret = asoc_simple_parse_clk_cpu(dev, ep, dai_link, dai);
 272                 if (ret < 0)
 273                         goto out_put_node;
 274
 275                 ret = asoc_simple_set_dailink_name(dev, dai_link,
 276                                                    "fe.%pOFP.%s",
 277                                                    cpus->of_node,
 278                                                    cpus->dai_name);
 279                 if (ret < 0)
 280                         goto out_put_node;
 281
 282                 /*
 283                  * In BE<->BE connections it is not required to create
 284                  * PCM devices at CPU end of the dai link and thus 'no_pcm'
 285                  * flag needs to be set. It is useful when there are many
 286                  * BE components and some of these have to be connected to
 287                  * form a valid audio path.
 288                  *
 289                  * For example: FE <-> BE1 <-> BE2 <-> ... <-> BEn where
 290                  * there are 'n' BE components in the path.
 291                  */
 292                 if (card->component_chaining && !soc_component_is_pcm(cpus))
 293                         dai_link->no_pcm = 1;
 294
 295                 /* card->num_links includes Codec */
 296                 asoc_simple_canonicalize_cpu(dai_link, is_single_links);
 297         } else {
 298                 struct snd_soc_codec_conf *cconf;
 299
 300                 /* CPU is dummy */
 301                 cpus->of_node           = NULL;
 302                 cpus->dai_name          = "snd-soc-dummy-dai";
 303                 cpus->name              = "snd-soc-dummy";
 304
 305                 /* BE settings */
 306                 dai_link->no_pcm                = 1;
 307                 dai_link->be_hw_params_fixup    = asoc_simple_be_hw_params_fixup;
 308
 309                 dai =
 310                 dai_props->codec_dai    = &priv->dais[li->dais++];
 311
 312                 cconf =
 313                 dai_props->codec_conf   = &priv->codec_conf[li->conf++];
 314
 315                 ret = asoc_simple_parse_codec(ep, dai_link);
 316                 if (ret < 0)
 317                         goto out_put_node;
 318
 319                 ret = asoc_simple_parse_clk_codec(dev, ep, dai_link, dai);
 320                 if (ret < 0)
 321                         goto out_put_node;
 322
 323                 ret = asoc_simple_set_dailink_name(dev, dai_link,
 324                                                    "be.%pOFP.%s",
 325                                                    codecs->of_node,
 326                                                    codecs->dai_name);
 327                 if (ret < 0)
 328                         goto out_put_node;
 329
 330                 /* check "prefix" from top node */
 331                 snd_soc_of_parse_node_prefix(top, cconf, codecs->of_node,
 332                                               "prefix");
 333                 snd_soc_of_parse_node_prefix(node, cconf, codecs->of_node,
 334                                              PREFIX "prefix");
 335                 snd_soc_of_parse_node_prefix(ports, cconf, codecs->of_node,
 336                                              "prefix");
 337                 snd_soc_of_parse_node_prefix(port, cconf, codecs->of_node,
 338                                              "prefix");
 339         }
 340
 341         graph_parse_convert(dev, ep, &dai_props->adata);
 342         graph_parse_mclk_fs(top, ep, dai_props);
 343
 344         asoc_simple_canonicalize_platform(dai_link);
 345
 346         ret = asoc_simple_parse_tdm(ep, dai);
 347         if (ret)
 348                 goto out_put_node;
 349
 350         ret = asoc_simple_parse_daifmt(dev, cpu_ep, codec_ep,
 351                                        NULL, &dai_link->dai_fmt);
 352         if (ret < 0)
 353                 goto out_put_node;
 354
 355         snd_soc_dai_link_set_capabilities(dai_link);
 356
 357         dai_link->ops                   = &graph_ops;
 358
 359         /* Use custom snd_soc_ops callbacks if available */
 360         if (priv->ops)
 361                 dai_link->ops = priv->ops;
 362
 363         dai_link->init                  = asoc_simple_dai_init;
 364
 365 out_put_node:
 366         of_node_put(ports);
 367         of_node_put(port);
 368         of_node_put(node);
 369         return ret;
 370 }
 371
 372 static int graph_dai_link_of(struct asoc_simple_priv *priv,
 373                              struct device_node *cpu_ep,
 374                              struct device_node *codec_ep,
 375                              struct link_info *li)
 376 {
 377         struct device *dev = simple_priv_to_dev(priv);
 378         struct snd_soc_dai_link *dai_link = simple_priv_to_link(priv, li->link);
 379         struct simple_dai_props *dai_props = simple_priv_to_props(priv, li->link);
 380         struct device_node *top = dev->of_node;
 381         struct asoc_simple_dai *cpu_dai;
 382         struct asoc_simple_dai *codec_dai;
 383         int ret, single_cpu;
 384
 385         /* Do it only CPU turn */
 386         if (!li->cpu)
 387                 return 0;
 388
 389         dev_dbg(dev, "link_of (%pOF)\n", cpu_ep);
 390
 391         li->link++;
 392
 393         cpu_dai                 =
 394         dai_props->cpu_dai      = &priv->dais[li->dais++];
 395         codec_dai               =
 396         dai_props->codec_dai    = &priv->dais[li->dais++];
 397
 398         /* Factor to mclk, used in hw_params() */
 399         graph_parse_mclk_fs(top, cpu_ep,   dai_props);
 400         graph_parse_mclk_fs(top, codec_ep, dai_props);
 401
 402         ret = asoc_simple_parse_daifmt(dev, cpu_ep, codec_ep,
 403                                        NULL, &dai_link->dai_fmt);
 404         if (ret < 0)
 405                 return ret;
 406
 407         ret = asoc_simple_parse_cpu(cpu_ep, dai_link, &single_cpu);
 408         if (ret < 0)
 409                 return ret;
 410
 411         ret = asoc_simple_parse_codec(codec_ep, dai_link);
 412         if (ret < 0)
 413                 return ret;
 414
 415         ret = asoc_simple_parse_tdm(cpu_ep, cpu_dai);
 416         if (ret < 0)
 417                 return ret;
 418
 419         ret = asoc_simple_parse_tdm(codec_ep, codec_dai);
 420         if (ret < 0)
 421                 return ret;
 422
 423         ret = asoc_simple_parse_clk_cpu(dev, cpu_ep, dai_link, cpu_dai);
 424         if (ret < 0)
 425                 return ret;
 426
 427         ret = asoc_simple_parse_clk_codec(dev, codec_ep, dai_link, codec_dai);
 428         if (ret < 0)
 429                 return ret;
 430
 431         ret = asoc_simple_set_dailink_name(dev, dai_link,
 432                                            "%s-%s",
 433                                            dai_link->cpus->dai_name,
 434                                            dai_link->codecs->dai_name);
 435         if (ret < 0)
 436                 return ret;
 437
 438         dai_link->ops = &graph_ops;
 439         dai_link->init = asoc_simple_dai_init;
 440
 441         asoc_simple_canonicalize_cpu(dai_link, single_cpu);
 442         asoc_simple_canonicalize_platform(dai_link);
 443
 444         return 0;
 445 }
 446
 447 static inline bool parse_as_dpcm_link(struct asoc_simple_priv *priv,
 448                                       struct device_node *codec_port,
 449                                       struct asoc_simple_data *adata)
 450 {
 451         if (priv->force_dpcm)
 452                 return true;
 453
 454         if (!priv->dpcm_selectable)
 455                 return false;
 456
 457         /*
 458          * It is DPCM
 459          * if Codec port has many endpoints,
 460          * or has convert-xxx property
 461          */
 462         if ((of_get_child_count(codec_port) > 1) ||
 463             (adata->convert_rate || adata->convert_channels))
 464                 return true;
 465
 466         return false;
 467 }
 468
 469 static int graph_for_each_link(struct asoc_simple_priv *priv,
 470                         struct link_info *li,
 471                         int (*func_noml)(struct asoc_simple_priv *priv,
 472                                          struct device_node *cpu_ep,
 473                                          struct device_node *codec_ep,
 474                                          struct link_info *li),
 475                         int (*func_dpcm)(struct asoc_simple_priv *priv,
 476                                          struct device_node *cpu_ep,
 477                                          struct device_node *codec_ep,
 478                                          struct link_info *li, int dup_codec))
 479 {
 480         struct of_phandle_iterator it;
 481         struct device *dev = simple_priv_to_dev(priv);
 482         struct device_node *node = dev->of_node;
 483         struct device_node *cpu_port;
 484         struct device_node *cpu_ep;
 485         struct device_node *codec_ep;
 486         struct device_node *codec_port;
 487         struct device_node *codec_port_old = NULL;
 488         struct asoc_simple_data adata;
 489         int rc, ret;
 490
 491         /* loop for all listed CPU port */
 492         of_for_each_phandle(&it, rc, node, "dais", NULL, 0) {
 493                 cpu_port = it.node;
 494                 cpu_ep   = NULL;
 495
 496                 /* loop for all CPU endpoint */
 497                 while (1) {
 498                         cpu_ep = of_get_next_child(cpu_port, cpu_ep);
 499                         if (!cpu_ep)
 500                                 break;
 501
 502                         /* get codec */
 503                         codec_ep = of_graph_get_remote_endpoint(cpu_ep);
 504                         codec_port = of_get_parent(codec_ep);
 505
 506                         /* get convert-xxx property */
 507                         memset(&adata, 0, sizeof(adata));
 508                         graph_parse_convert(dev, codec_ep, &adata);
 509                         graph_parse_convert(dev, cpu_ep,   &adata);
 510
 511                         /* check if link requires DPCM parsing */
 512                         if (parse_as_dpcm_link(priv, codec_port, &adata))
 513                                 ret = func_dpcm(priv, cpu_ep, codec_ep, li,
 514                                                 (codec_port_old == codec_port));
 515                         /* else normal sound */
 516                         else
 517                                 ret = func_noml(priv, cpu_ep, codec_ep, li);
 518
 519                         of_node_put(codec_ep);
 520                         of_node_put(codec_port);
 521
 522                         if (ret < 0)
 523                                 return ret;
 524
 525                         codec_port_old = codec_port;
 526                 }
 527         }
 528
 529         return 0;
 530 }
 531
 532 static void graph_get_dais_count(struct asoc_simple_priv *priv,
 533                                  struct link_info *li);
 534
 535 int graph_parse_of(struct asoc_simple_priv *priv, struct device *dev)
 536 {
 537         struct snd_soc_card *card = simple_priv_to_card(priv);
 538         struct link_info li;
 539         int ret;
 540
 541         card->owner = THIS_MODULE;
 542         card->dev = dev;
 543
 544         memset(&li, 0, sizeof(li));
 545         graph_get_dais_count(priv, &li);
 546         if (!li.link || !li.dais)
 547                 return -EINVAL;
 548
 549         ret = asoc_simple_init_priv(priv, &li);
 550         if (ret < 0)
 551                 return ret;
 552
 553         priv->pa_gpio = devm_gpiod_get_optional(dev, "pa", GPIOD_OUT_LOW);
 554         if (IS_ERR(priv->pa_gpio)) {
 555                 ret = PTR_ERR(priv->pa_gpio);
 556                 dev_err(dev, "failed to get amplifier gpio: %d\n", ret);
 557                 return ret;
 558         }
 559
 560         ret = asoc_simple_parse_widgets(card, NULL);
 561         if (ret < 0)
 562                 return ret;
 563
 564         ret = asoc_simple_parse_routing(card, NULL);
 565         if (ret < 0)
 566                 return ret;
 567
 568         memset(&li, 0, sizeof(li));
 569         for (li.cpu = 1; li.cpu >= 0; li.cpu--) {
 570                 /*
 571                  * Detect all CPU first, and Detect all Codec 2nd.
 572                  *
 573                  * In Normal sound case, all DAIs are detected
 574                  * as "CPU-Codec".
 575                  *
 576                  * In DPCM sound case,
 577                  * all CPUs   are detected as "CPU-dummy", and
 578                  * all Codecs are detected as "dummy-Codec".
 579                  * To avoid random sub-device numbering,
 580                  * detect "dummy-Codec" in last;
 581                  */
 582                 ret = graph_for_each_link(priv, &li,
 583                                           graph_dai_link_of,
 584                                           graph_dai_link_of_dpcm);
 585                 if (ret < 0)
 586                         goto err;
 587         }
 588
 589         ret = asoc_simple_parse_card_name(card, NULL);
 590         if (ret < 0)
 591                 goto err;
 592
 593         snd_soc_card_set_drvdata(card, priv);
 594
 595         asoc_simple_debug_info(priv);
 596
 597         ret = devm_snd_soc_register_card(dev, card);
 598         if (ret < 0)
 599                 goto err;
 600
 601         return 0;
 602
 603 err:
 604         asoc_simple_clean_reference(card);
 605
 606         if (ret != -EPROBE_DEFER)
 607                 dev_err(dev, "parse error %d\n", ret);
 608
 609         return ret;
 610 }
 611 EXPORT_SYMBOL_GPL(graph_parse_of);
 612
 613 static int graph_count_noml(struct asoc_simple_priv *priv,
 614                             struct device_node *cpu_ep,
 615                             struct device_node *codec_ep,
 616                             struct link_info *li)
 617 {
 618         struct device *dev = simple_priv_to_dev(priv);
 619
 620         li->link += 1; /* 1xCPU-Codec */
 621         li->dais += 2; /* 1xCPU + 1xCodec */
 622
 623         dev_dbg(dev, "Count As Normal\n");
 624
 625         return 0;
 626 }
 627
 628 static int graph_count_dpcm(struct asoc_simple_priv *priv,
 629                             struct device_node *cpu_ep,
 630                             struct device_node *codec_ep,
 631                             struct link_info *li,
 632                             int dup_codec)
 633 {
 634         struct device *dev = simple_priv_to_dev(priv);
 635
 636         li->link++; /* 1xCPU-dummy */
 637         li->dais++; /* 1xCPU */
 638
 639         if (!dup_codec && codec_ep) {
 640                 li->link++; /* 1xdummy-Codec */
 641                 li->conf++; /* 1xdummy-Codec */
 642                 li->dais++; /* 1xCodec */
 643         }
 644
 645         dev_dbg(dev, "Count As DPCM\n");
 646
 647         return 0;
 648 }
 649
 650 static void graph_get_dais_count(struct asoc_simple_priv *priv,
 651                                  struct link_info *li)
 652 {
 653         struct device *dev = simple_priv_to_dev(priv);
 654
 655         /*
 656          * link_num :   number of links.
 657          *              CPU-Codec / CPU-dummy / dummy-Codec
 658          * dais_num :   number of DAIs
 659          * ccnf_num :   number of codec_conf
 660          *              same number for "dummy-Codec"
 661          *
 662          * ex1)
 663          * CPU0 --- Codec0      link : 5
 664          * CPU1 --- Codec1      dais : 7
 665          * CPU2 -/              ccnf : 1
 666          * CPU3 --- Codec2
 667          *
 668          *      => 5 links = 2xCPU-Codec + 2xCPU-dummy + 1xdummy-Codec
 669          *      => 7 DAIs  = 4xCPU + 3xCodec
 670          *      => 1 ccnf  = 1xdummy-Codec
 671          *
 672          * ex2)
 673          * CPU0 --- Codec0      link : 5
 674          * CPU1 --- Codec1      dais : 6
 675          * CPU2 -/              ccnf : 1
 676          * CPU3 -/
 677          *
 678          *      => 5 links = 1xCPU-Codec + 3xCPU-dummy + 1xdummy-Codec
 679          *      => 6 DAIs  = 4xCPU + 2xCodec
 680          *      => 1 ccnf  = 1xdummy-Codec
 681          *
 682          * ex3)
 683          * CPU0 --- Codec0      link : 6
 684          * CPU1 -/              dais : 6
 685          * CPU2 --- Codec1      ccnf : 2
 686          * CPU3 -/
 687          *
 688          *      => 6 links = 0xCPU-Codec + 4xCPU-dummy + 2xdummy-Codec
 689          *      => 6 DAIs  = 4xCPU + 2xCodec
 690          *      => 2 ccnf  = 2xdummy-Codec
 691          *
 692          * ex4)
 693          * CPU0 --- Codec0 (convert-rate)       link : 3
 694          * CPU1 --- Codec1                      dais : 4
 695          *                                      ccnf : 1
 696          *
 697          *      => 3 links = 1xCPU-Codec + 1xCPU-dummy + 1xdummy-Codec
 698          *      => 4 DAIs  = 2xCPU + 2xCodec
 699          *      => 1 ccnf  = 1xdummy-Codec
 700          */
 701         graph_for_each_link(priv, li,
 702                             graph_count_noml,
 703                             graph_count_dpcm);
 704         dev_dbg(dev, "link %d, dais %d, ccnf %d\n",
 705                 li->link, li->dais, li->conf);
 706 }
 707
 708 int graph_card_probe(struct snd_soc_card *card)
 709 {
 710         struct asoc_simple_priv *priv = snd_soc_card_get_drvdata(card);
 711         int ret;
 712
 713         ret = asoc_simple_init_hp(card, &priv->hp_jack, NULL);
 714         if (ret < 0)
 715                 return ret;
 716
 717         ret = asoc_simple_init_mic(card, &priv->mic_jack, NULL);
 718         if (ret < 0)
 719                 return ret;
 720
 721         return 0;
 722 }
 723 EXPORT_SYMBOL_GPL(graph_card_probe);
 724
 725 static int graph_probe(struct platform_device *pdev)
 726 {
 727         struct asoc_simple_priv *priv;
 728         struct device *dev = &pdev->dev;
 729         struct snd_soc_card *card;
 730
 731         /* Allocate the private data and the DAI link array */
 732         priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
 733         if (!priv)
 734                 return -ENOMEM;
 735
 736         card = simple_priv_to_card(priv);
 737         card->dapm_widgets      = graph_dapm_widgets;
 738         card->num_dapm_widgets  = ARRAY_SIZE(graph_dapm_widgets);
 739         card->probe             = graph_card_probe;
 740
 741         if (of_device_get_match_data(dev))
 742                 priv->dpcm_selectable = 1;
 743
 744         return graph_parse_of(priv, dev);
 745 }
 746
 747 static int graph_remove(struct platform_device *pdev)
 748 {
 749         struct snd_soc_card *card = platform_get_drvdata(pdev);
 750
 751         return asoc_simple_clean_reference(card);
 752 }
 753
 754 static const struct of_device_id graph_of_match[] = {
 755         { .compatible = "audio-graph-card", },
 756         { .compatible = "audio-graph-scu-card",
 757           .data = (void *)DPCM_SELECTABLE },
 758         {},
 759 };
 760 MODULE_DEVICE_TABLE(of, graph_of_match);
 761
 762 static struct platform_driver graph_card = {
 763         .driver = {
 764                 .name = "asoc-audio-graph-card",
 765                 .pm = &snd_soc_pm_ops,
 766                 .of_match_table = graph_of_match,
 767         },
 768         .probe = graph_probe,
 769         .remove = graph_remove,
 770 };
 771 module_platform_driver(graph_card);
 772
 773 MODULE_ALIAS("platform:asoc-audio-graph-card");
 774 MODULE_LICENSE("GPL v2");
 775 MODULE_DESCRIPTION("ASoC Audio Graph Sound Card");
 776 MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");