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/simple_card_utils.h>
  22
  23 #define DPCM_SELECTABLE 1
  24
  25 struct graph_priv {
  26         struct snd_soc_card snd_card;
  27         struct graph_dai_props {
  28                 struct asoc_simple_dai *cpu_dai;
  29                 struct asoc_simple_dai *codec_dai;
  30                 struct snd_soc_dai_link_component codecs; /* single codec */
  31                 struct snd_soc_dai_link_component platforms;
  32                 struct asoc_simple_card_data adata;
  33                 struct snd_soc_codec_conf *codec_conf;
  34                 unsigned int mclk_fs;
  35         } *dai_props;
  36         struct asoc_simple_jack hp_jack;
  37         struct asoc_simple_jack mic_jack;
  38         struct snd_soc_dai_link *dai_link;
  39         struct asoc_simple_dai *dais;
  40         struct snd_soc_codec_conf *codec_conf;
  41         struct gpio_desc *pa_gpio;
  42 };
  43
  44 struct link_info {
  45         int dais; /* number of dai  */
  46         int link; /* number of link */
  47         int conf; /* number of codec_conf */
  48         int cpu;  /* turn for CPU / Codec */
  49 };
  50
  51 #define graph_priv_to_card(priv) (&(priv)->snd_card)
  52 #define graph_priv_to_props(priv, i) ((priv)->dai_props + (i))
  53 #define graph_priv_to_dev(priv) (graph_priv_to_card(priv)->dev)
  54 #define graph_priv_to_link(priv, i) (graph_priv_to_card(priv)->dai_link + (i))
  55
  56 #define PREFIX  "audio-graph-card,"
  57
  58 static int graph_outdrv_event(struct snd_soc_dapm_widget *w,
  59                               struct snd_kcontrol *kcontrol,
  60                               int event)
  61 {
  62         struct snd_soc_dapm_context *dapm = w->dapm;
  63         struct graph_priv *priv = snd_soc_card_get_drvdata(dapm->card);
  64
  65         switch (event) {
  66         case SND_SOC_DAPM_POST_PMU:
  67                 gpiod_set_value_cansleep(priv->pa_gpio, 1);
  68                 break;
  69         case SND_SOC_DAPM_PRE_PMD:
  70                 gpiod_set_value_cansleep(priv->pa_gpio, 0);
  71                 break;
  72         default:
  73                 return -EINVAL;
  74         }
  75
  76         return 0;
  77 }
  78
  79 static const struct snd_soc_dapm_widget graph_dapm_widgets[] = {
  80         SND_SOC_DAPM_OUT_DRV_E("Amplifier", SND_SOC_NOPM,
  81                                0, 0, NULL, 0, graph_outdrv_event,
  82                                SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD),
  83 };
  84
  85 static int graph_startup(struct snd_pcm_substream *substream)
  86 {
  87         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  88         struct graph_priv *priv = snd_soc_card_get_drvdata(rtd->card);
  89         struct graph_dai_props *dai_props = graph_priv_to_props(priv, rtd->num);
  90         int ret;
  91
  92         ret = asoc_simple_card_clk_enable(dai_props->cpu_dai);
  93         if (ret)
  94                 return ret;
  95
  96         ret = asoc_simple_card_clk_enable(dai_props->codec_dai);
  97         if (ret)
  98                 asoc_simple_card_clk_disable(dai_props->cpu_dai);
  99
 100         return ret;
 101 }
 102
 103 static void graph_shutdown(struct snd_pcm_substream *substream)
 104 {
 105         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 106         struct graph_priv *priv = snd_soc_card_get_drvdata(rtd->card);
 107         struct graph_dai_props *dai_props = graph_priv_to_props(priv, rtd->num);
 108
 109         asoc_simple_card_clk_disable(dai_props->cpu_dai);
 110
 111         asoc_simple_card_clk_disable(dai_props->codec_dai);
 112 }
 113
 114 static int graph_hw_params(struct snd_pcm_substream *substream,
 115                            struct snd_pcm_hw_params *params)
 116 {
 117         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 118         struct snd_soc_dai *codec_dai = rtd->codec_dai;
 119         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 120         struct graph_priv *priv = snd_soc_card_get_drvdata(rtd->card);
 121         struct graph_dai_props *dai_props = graph_priv_to_props(priv, rtd->num);
 122         unsigned int mclk, mclk_fs = 0;
 123         int ret = 0;
 124
 125         if (dai_props->mclk_fs)
 126                 mclk_fs = dai_props->mclk_fs;
 127
 128         if (mclk_fs) {
 129                 mclk = params_rate(params) * mclk_fs;
 130                 ret = snd_soc_dai_set_sysclk(codec_dai, 0, mclk,
 131                                              SND_SOC_CLOCK_IN);
 132                 if (ret && ret != -ENOTSUPP)
 133                         goto err;
 134
 135                 ret = snd_soc_dai_set_sysclk(cpu_dai, 0, mclk,
 136                                              SND_SOC_CLOCK_OUT);
 137                 if (ret && ret != -ENOTSUPP)
 138                         goto err;
 139         }
 140         return 0;
 141 err:
 142         return ret;
 143 }
 144
 145 static const struct snd_soc_ops graph_ops = {
 146         .startup        = graph_startup,
 147         .shutdown       = graph_shutdown,
 148         .hw_params      = graph_hw_params,
 149 };
 150
 151 static int graph_dai_init(struct snd_soc_pcm_runtime *rtd)
 152 {
 153         struct graph_priv *priv = snd_soc_card_get_drvdata(rtd->card);
 154         struct graph_dai_props *dai_props = graph_priv_to_props(priv, rtd->num);
 155         int ret = 0;
 156
 157         ret = asoc_simple_card_init_dai(rtd->codec_dai,
 158                                         dai_props->codec_dai);
 159         if (ret < 0)
 160                 return ret;
 161
 162         ret = asoc_simple_card_init_dai(rtd->cpu_dai,
 163                                         dai_props->cpu_dai);
 164         if (ret < 0)
 165                 return ret;
 166
 167         return 0;
 168 }
 169
 170 static int graph_be_hw_params_fixup(struct snd_soc_pcm_runtime *rtd,
 171                                     struct snd_pcm_hw_params *params)
 172 {
 173         struct graph_priv *priv = snd_soc_card_get_drvdata(rtd->card);
 174         struct graph_dai_props *dai_props = graph_priv_to_props(priv, rtd->num);
 175
 176         asoc_simple_card_convert_fixup(&dai_props->adata, params);
 177
 178         return 0;
 179 }
 180
 181 static void graph_get_conversion(struct device *dev,
 182                                  struct device_node *ep,
 183                                  struct asoc_simple_card_data *adata)
 184 {
 185         struct device_node *top = dev->of_node;
 186         struct device_node *port = of_get_parent(ep);
 187         struct device_node *ports = of_get_parent(port);
 188         struct device_node *node = of_graph_get_port_parent(ep);
 189
 190         asoc_simple_card_parse_convert(dev, top,   NULL,   adata);
 191         asoc_simple_card_parse_convert(dev, node,  PREFIX, adata);
 192         asoc_simple_card_parse_convert(dev, ports, NULL,   adata);
 193         asoc_simple_card_parse_convert(dev, port,  NULL,   adata);
 194         asoc_simple_card_parse_convert(dev, ep,    NULL,   adata);
 195 }
 196
 197 static int graph_dai_link_of_dpcm(struct graph_priv *priv,
 198                                   struct device_node *cpu_ep,
 199                                   struct device_node *codec_ep,
 200                                   struct link_info *li,
 201                                   int dup_codec)
 202 {
 203         struct device *dev = graph_priv_to_dev(priv);
 204         struct snd_soc_dai_link *dai_link = graph_priv_to_link(priv, li->link);
 205         struct graph_dai_props *dai_props = graph_priv_to_props(priv, li->link);
 206         struct device_node *top = dev->of_node;
 207         struct device_node *ep = li->cpu ? cpu_ep : codec_ep;
 208         struct device_node *port;
 209         struct device_node *ports;
 210         struct device_node *node;
 211         struct asoc_simple_dai *dai;
 212         struct snd_soc_dai_link_component *codecs = dai_link->codecs;
 213         int ret;
 214
 215         /* Do it all CPU endpoint, and 1st Codec endpoint */
 216         if (!li->cpu && dup_codec)
 217                 return 0;
 218
 219         port    = of_get_parent(ep);
 220         ports   = of_get_parent(port);
 221         node    = of_graph_get_port_parent(ep);
 222
 223         li->link++;
 224
 225         dev_dbg(dev, "link_of DPCM (%pOF)\n", ep);
 226
 227         of_property_read_u32(top,   "mclk-fs", &dai_props->mclk_fs);
 228         of_property_read_u32(ports, "mclk-fs", &dai_props->mclk_fs);
 229         of_property_read_u32(port,  "mclk-fs", &dai_props->mclk_fs);
 230         of_property_read_u32(ep,    "mclk-fs", &dai_props->mclk_fs);
 231
 232         graph_get_conversion(dev, ep, &dai_props->adata);
 233
 234         of_node_put(ports);
 235         of_node_put(port);
 236         of_node_put(node);
 237
 238         if (li->cpu) {
 239
 240                 /* BE is dummy */
 241                 codecs->of_node         = NULL;
 242                 codecs->dai_name        = "snd-soc-dummy-dai";
 243                 codecs->name            = "snd-soc-dummy";
 244
 245                 /* FE settings */
 246                 dai_link->dynamic               = 1;
 247                 dai_link->dpcm_merged_format    = 1;
 248
 249                 dai =
 250                 dai_props->cpu_dai      = &priv->dais[li->dais++];
 251
 252                 ret = asoc_simple_card_parse_graph_cpu(ep, dai_link);
 253                 if (ret)
 254                         return ret;
 255
 256                 ret = asoc_simple_card_parse_clk_cpu(dev, ep, dai_link, dai);
 257                 if (ret < 0)
 258                         return ret;
 259
 260                 ret = asoc_simple_card_set_dailink_name(dev, dai_link,
 261                                                         "fe.%s",
 262                                                         dai_link->cpu_dai_name);
 263                 if (ret < 0)
 264                         return ret;
 265
 266                 /* card->num_links includes Codec */
 267                 asoc_simple_card_canonicalize_cpu(dai_link,
 268                         of_graph_get_endpoint_count(dai_link->cpu_of_node) == 1);
 269         } else {
 270                 struct snd_soc_codec_conf *cconf;
 271
 272                 /* FE is dummy */
 273                 dai_link->cpu_of_node           = NULL;
 274                 dai_link->cpu_dai_name          = "snd-soc-dummy-dai";
 275                 dai_link->cpu_name              = "snd-soc-dummy";
 276
 277                 /* BE settings */
 278                 dai_link->no_pcm                = 1;
 279                 dai_link->be_hw_params_fixup    = graph_be_hw_params_fixup;
 280
 281                 dai =
 282                 dai_props->codec_dai    = &priv->dais[li->dais++];
 283
 284                 cconf =
 285                 dai_props->codec_conf   = &priv->codec_conf[li->conf++];
 286
 287                 ret = asoc_simple_card_parse_graph_codec(ep, dai_link);
 288                 if (ret < 0)
 289                         return ret;
 290
 291                 ret = asoc_simple_card_parse_clk_codec(dev, ep, dai_link, dai);
 292                 if (ret < 0)
 293                         return ret;
 294
 295                 ret = asoc_simple_card_set_dailink_name(dev, dai_link,
 296                                                         "be.%s",
 297                                                         codecs->dai_name);
 298                 if (ret < 0)
 299                         return ret;
 300
 301                 /* check "prefix" from top node */
 302                 snd_soc_of_parse_node_prefix(top, cconf, codecs->of_node,
 303                                               "prefix");
 304                 snd_soc_of_parse_node_prefix(node, cconf, codecs->of_node,
 305                                              PREFIX "prefix");
 306                 snd_soc_of_parse_node_prefix(ports, cconf, codecs->of_node,
 307                                              "prefix");
 308                 snd_soc_of_parse_node_prefix(port, cconf, codecs->of_node,
 309                                              "prefix");
 310         }
 311
 312         asoc_simple_card_canonicalize_platform(dai_link);
 313
 314         ret = asoc_simple_card_of_parse_tdm(ep, dai);
 315         if (ret)
 316                 return ret;
 317
 318         ret = asoc_simple_card_parse_daifmt(dev, cpu_ep, codec_ep,
 319                                             NULL, &dai_link->dai_fmt);
 320         if (ret < 0)
 321                 return ret;
 322
 323         dai_link->dpcm_playback         = 1;
 324         dai_link->dpcm_capture          = 1;
 325         dai_link->ops                   = &graph_ops;
 326         dai_link->init                  = graph_dai_init;
 327
 328         return 0;
 329 }
 330
 331 static int graph_dai_link_of(struct graph_priv *priv,
 332                              struct device_node *cpu_ep,
 333                              struct device_node *codec_ep,
 334                              struct link_info *li)
 335 {
 336         struct device *dev = graph_priv_to_dev(priv);
 337         struct snd_soc_dai_link *dai_link = graph_priv_to_link(priv, li->link);
 338         struct graph_dai_props *dai_props = graph_priv_to_props(priv, li->link);
 339         struct device_node *top = dev->of_node;
 340         struct device_node *cpu_port;
 341         struct device_node *cpu_ports;
 342         struct device_node *codec_port;
 343         struct device_node *codec_ports;
 344         struct asoc_simple_dai *cpu_dai;
 345         struct asoc_simple_dai *codec_dai;
 346         int ret;
 347
 348         /* Do it only CPU turn */
 349         if (!li->cpu)
 350                 return 0;
 351
 352         cpu_port        = of_get_parent(cpu_ep);
 353         cpu_ports       = of_get_parent(cpu_port);
 354         codec_port      = of_get_parent(codec_ep);
 355         codec_ports     = of_get_parent(codec_port);
 356
 357         dev_dbg(dev, "link_of (%pOF)\n", cpu_ep);
 358
 359         li->link++;
 360
 361         cpu_dai                 =
 362         dai_props->cpu_dai      = &priv->dais[li->dais++];
 363         codec_dai               =
 364         dai_props->codec_dai    = &priv->dais[li->dais++];
 365
 366         /* Factor to mclk, used in hw_params() */
 367         of_property_read_u32(top,         "mclk-fs", &dai_props->mclk_fs);
 368         of_property_read_u32(cpu_ports,   "mclk-fs", &dai_props->mclk_fs);
 369         of_property_read_u32(codec_ports, "mclk-fs", &dai_props->mclk_fs);
 370         of_property_read_u32(cpu_port,    "mclk-fs", &dai_props->mclk_fs);
 371         of_property_read_u32(codec_port,  "mclk-fs", &dai_props->mclk_fs);
 372         of_property_read_u32(cpu_ep,      "mclk-fs", &dai_props->mclk_fs);
 373         of_property_read_u32(codec_ep,    "mclk-fs", &dai_props->mclk_fs);
 374         of_node_put(cpu_port);
 375         of_node_put(cpu_ports);
 376         of_node_put(codec_port);
 377         of_node_put(codec_ports);
 378
 379         ret = asoc_simple_card_parse_daifmt(dev, cpu_ep, codec_ep,
 380                                             NULL, &dai_link->dai_fmt);
 381         if (ret < 0)
 382                 return ret;
 383
 384         ret = asoc_simple_card_parse_graph_cpu(cpu_ep, dai_link);
 385         if (ret < 0)
 386                 return ret;
 387
 388         ret = asoc_simple_card_parse_graph_codec(codec_ep, dai_link);
 389         if (ret < 0)
 390                 return ret;
 391
 392         ret = asoc_simple_card_of_parse_tdm(cpu_ep, cpu_dai);
 393         if (ret < 0)
 394                 return ret;
 395
 396         ret = asoc_simple_card_of_parse_tdm(codec_ep, codec_dai);
 397         if (ret < 0)
 398                 return ret;
 399
 400         ret = asoc_simple_card_parse_clk_cpu(dev, cpu_ep, dai_link, cpu_dai);
 401         if (ret < 0)
 402                 return ret;
 403
 404         ret = asoc_simple_card_parse_clk_codec(dev, codec_ep, dai_link, codec_dai);
 405         if (ret < 0)
 406                 return ret;
 407
 408         ret = asoc_simple_card_set_dailink_name(dev, dai_link,
 409                                                 "%s-%s",
 410                                                 dai_link->cpu_dai_name,
 411                                                 dai_link->codecs->dai_name);
 412         if (ret < 0)
 413                 return ret;
 414
 415         dai_link->ops = &graph_ops;
 416         dai_link->init = graph_dai_init;
 417
 418         asoc_simple_card_canonicalize_platform(dai_link);
 419         asoc_simple_card_canonicalize_cpu(dai_link,
 420                 of_graph_get_endpoint_count(dai_link->cpu_of_node) == 1);
 421
 422         return 0;
 423 }
 424
 425 static int graph_for_each_link(struct graph_priv *priv,
 426                         struct link_info *li,
 427                         int (*func_noml)(struct graph_priv *priv,
 428                                          struct device_node *cpu_ep,
 429                                          struct device_node *codec_ep,
 430                                          struct link_info *li),
 431                         int (*func_dpcm)(struct graph_priv *priv,
 432                                          struct device_node *cpu_ep,
 433                                          struct device_node *codec_ep,
 434                                          struct link_info *li, int dup_codec))
 435 {
 436         struct of_phandle_iterator it;
 437         struct device *dev = graph_priv_to_dev(priv);
 438         struct device_node *node = dev->of_node;
 439         struct device_node *cpu_port;
 440         struct device_node *cpu_ep;
 441         struct device_node *codec_ep;
 442         struct device_node *codec_port;
 443         struct device_node *codec_port_old = NULL;
 444         struct asoc_simple_card_data adata;
 445         uintptr_t dpcm_selectable = (uintptr_t)of_device_get_match_data(dev);
 446         int rc, ret;
 447
 448         /* loop for all listed CPU port */
 449         of_for_each_phandle(&it, rc, node, "dais", NULL, 0) {
 450                 cpu_port = it.node;
 451                 cpu_ep   = NULL;
 452
 453                 /* loop for all CPU endpoint */
 454                 while (1) {
 455                         cpu_ep = of_get_next_child(cpu_port, cpu_ep);
 456                         if (!cpu_ep)
 457                                 break;
 458
 459                         /* get codec */
 460                         codec_ep = of_graph_get_remote_endpoint(cpu_ep);
 461                         codec_port = of_get_parent(codec_ep);
 462
 463                         of_node_put(codec_ep);
 464                         of_node_put(codec_port);
 465
 466                         /* get convert-xxx property */
 467                         memset(&adata, 0, sizeof(adata));
 468                         graph_get_conversion(dev, codec_ep, &adata);
 469                         graph_get_conversion(dev, cpu_ep,   &adata);
 470
 471                         /*
 472                          * It is DPCM
 473                          * if Codec port has many endpoints,
 474                          * or has convert-xxx property
 475                          */
 476                         if (dpcm_selectable &&
 477                             ((of_get_child_count(codec_port) > 1) ||
 478                              adata.convert_rate || adata.convert_channels))
 479                                 ret = func_dpcm(priv, cpu_ep, codec_ep, li,
 480                                                 (codec_port_old == codec_port));
 481                         /* else normal sound */
 482                         else
 483                                 ret = func_noml(priv, cpu_ep, codec_ep, li);
 484
 485                         if (ret < 0)
 486                                 return ret;
 487
 488                         codec_port_old = codec_port;
 489                 }
 490         }
 491
 492         return 0;
 493 }
 494
 495 static int graph_parse_of(struct graph_priv *priv)
 496 {
 497         struct snd_soc_card *card = graph_priv_to_card(priv);
 498         struct link_info li;
 499         int ret;
 500
 501         ret = asoc_simple_card_of_parse_widgets(card, NULL);
 502         if (ret < 0)
 503                 return ret;
 504
 505         ret = asoc_simple_card_of_parse_routing(card, NULL);
 506         if (ret < 0)
 507                 return ret;
 508
 509         memset(&li, 0, sizeof(li));
 510         for (li.cpu = 1; li.cpu >= 0; li.cpu--) {
 511                 /*
 512                  * Detect all CPU first, and Detect all Codec 2nd.
 513                  *
 514                  * In Normal sound case, all DAIs are detected
 515                  * as "CPU-Codec".
 516                  *
 517                  * In DPCM sound case,
 518                  * all CPUs   are detected as "CPU-dummy", and
 519                  * all Codecs are detected as "dummy-Codec".
 520                  * To avoid random sub-device numbering,
 521                  * detect "dummy-Codec" in last;
 522                  */
 523                 ret = graph_for_each_link(priv, &li,
 524                                           graph_dai_link_of,
 525                                           graph_dai_link_of_dpcm);
 526                 if (ret < 0)
 527                         return ret;
 528         }
 529
 530         return asoc_simple_card_parse_card_name(card, NULL);
 531 }
 532
 533 static int graph_count_noml(struct graph_priv *priv,
 534                             struct device_node *cpu_ep,
 535                             struct device_node *codec_ep,
 536                             struct link_info *li)
 537 {
 538         struct device *dev = graph_priv_to_dev(priv);
 539
 540         li->link += 1; /* 1xCPU-Codec */
 541         li->dais += 2; /* 1xCPU + 1xCodec */
 542
 543         dev_dbg(dev, "Count As Normal\n");
 544
 545         return 0;
 546 }
 547
 548 static int graph_count_dpcm(struct graph_priv *priv,
 549                             struct device_node *cpu_ep,
 550                             struct device_node *codec_ep,
 551                             struct link_info *li,
 552                             int dup_codec)
 553 {
 554         struct device *dev = graph_priv_to_dev(priv);
 555
 556         li->link++; /* 1xCPU-dummy */
 557         li->dais++; /* 1xCPU */
 558
 559         if (!dup_codec) {
 560                 li->link++; /* 1xdummy-Codec */
 561                 li->conf++; /* 1xdummy-Codec */
 562                 li->dais++; /* 1xCodec */
 563         }
 564
 565         dev_dbg(dev, "Count As DPCM\n");
 566
 567         return 0;
 568 }
 569
 570 static void graph_get_dais_count(struct graph_priv *priv,
 571                                  struct link_info *li)
 572 {
 573         struct device *dev = graph_priv_to_dev(priv);
 574
 575         /*
 576          * link_num :   number of links.
 577          *              CPU-Codec / CPU-dummy / dummy-Codec
 578          * dais_num :   number of DAIs
 579          * ccnf_num :   number of codec_conf
 580          *              same number for "dummy-Codec"
 581          *
 582          * ex1)
 583          * CPU0 --- Codec0      link : 5
 584          * CPU1 --- Codec1      dais : 7
 585          * CPU2 -/              ccnf : 1
 586          * CPU3 --- Codec2
 587          *
 588          *      => 5 links = 2xCPU-Codec + 2xCPU-dummy + 1xdummy-Codec
 589          *      => 7 DAIs  = 4xCPU + 3xCodec
 590          *      => 1 ccnf  = 1xdummy-Codec
 591          *
 592          * ex2)
 593          * CPU0 --- Codec0      link : 5
 594          * CPU1 --- Codec1      dais : 6
 595          * CPU2 -/              ccnf : 1
 596          * CPU3 -/
 597          *
 598          *      => 5 links = 1xCPU-Codec + 3xCPU-dummy + 1xdummy-Codec
 599          *      => 6 DAIs  = 4xCPU + 2xCodec
 600          *      => 1 ccnf  = 1xdummy-Codec
 601          *
 602          * ex3)
 603          * CPU0 --- Codec0      link : 6
 604          * CPU1 -/              dais : 6
 605          * CPU2 --- Codec1      ccnf : 2
 606          * CPU3 -/
 607          *
 608          *      => 6 links = 0xCPU-Codec + 4xCPU-dummy + 2xdummy-Codec
 609          *      => 6 DAIs  = 4xCPU + 2xCodec
 610          *      => 2 ccnf  = 2xdummy-Codec
 611          *
 612          * ex4)
 613          * CPU0 --- Codec0 (convert-rate)       link : 3
 614          * CPU1 --- Codec1                      dais : 4
 615          *                                      ccnf : 1
 616          *
 617          *      => 3 links = 1xCPU-Codec + 1xCPU-dummy + 1xdummy-Codec
 618          *      => 4 DAIs  = 2xCPU + 2xCodec
 619          *      => 1 ccnf  = 1xdummy-Codec
 620          */
 621         graph_for_each_link(priv, li,
 622                             graph_count_noml,
 623                             graph_count_dpcm);
 624         dev_dbg(dev, "link %d, dais %d, ccnf %d\n",
 625                 li->link, li->dais, li->conf);
 626 }
 627
 628 static int graph_card_probe(struct snd_soc_card *card)
 629 {
 630         struct graph_priv *priv = snd_soc_card_get_drvdata(card);
 631         int ret;
 632
 633         ret = asoc_simple_card_init_hp(card, &priv->hp_jack, NULL);
 634         if (ret < 0)
 635                 return ret;
 636
 637         ret = asoc_simple_card_init_mic(card, &priv->mic_jack, NULL);
 638         if (ret < 0)
 639                 return ret;
 640
 641         return 0;
 642 }
 643
 644 static int graph_probe(struct platform_device *pdev)
 645 {
 646         struct graph_priv *priv;
 647         struct snd_soc_dai_link *dai_link;
 648         struct graph_dai_props *dai_props;
 649         struct asoc_simple_dai *dais;
 650         struct device *dev = &pdev->dev;
 651         struct snd_soc_card *card;
 652         struct snd_soc_codec_conf *cconf;
 653         struct link_info li;
 654         int ret, i;
 655
 656         /* Allocate the private data and the DAI link array */
 657         priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
 658         if (!priv)
 659                 return -ENOMEM;
 660
 661         card = graph_priv_to_card(priv);
 662         card->owner             = THIS_MODULE;
 663         card->dev               = dev;
 664         card->dapm_widgets      = graph_dapm_widgets;
 665         card->num_dapm_widgets  = ARRAY_SIZE(graph_dapm_widgets);
 666         card->probe             = graph_card_probe;
 667
 668         memset(&li, 0, sizeof(li));
 669         graph_get_dais_count(priv, &li);
 670         if (!li.link || !li.dais)
 671                 return -EINVAL;
 672
 673         dai_props = devm_kcalloc(dev, li.link, sizeof(*dai_props), GFP_KERNEL);
 674         dai_link  = devm_kcalloc(dev, li.link, sizeof(*dai_link),  GFP_KERNEL);
 675         dais      = devm_kcalloc(dev, li.dais, sizeof(*dais),      GFP_KERNEL);
 676         cconf     = devm_kcalloc(dev, li.conf, sizeof(*cconf),     GFP_KERNEL);
 677         if (!dai_props || !dai_link || !dais)
 678                 return -ENOMEM;
 679
 680         /*
 681          * Use snd_soc_dai_link_component instead of legacy style
 682          * It is codec only. but cpu/platform will be supported in the future.
 683          * see
 684          *      soc-core.c :: snd_soc_init_multicodec()
 685          */
 686         for (i = 0; i < li.link; i++) {
 687                 dai_link[i].codecs      = &dai_props[i].codecs;
 688                 dai_link[i].num_codecs  = 1;
 689                 dai_link[i].platforms   = &dai_props[i].platforms;
 690                 dai_link[i].num_platforms = 1;
 691         }
 692
 693         priv->pa_gpio = devm_gpiod_get_optional(dev, "pa", GPIOD_OUT_LOW);
 694         if (IS_ERR(priv->pa_gpio)) {
 695                 ret = PTR_ERR(priv->pa_gpio);
 696                 dev_err(dev, "failed to get amplifier gpio: %d\n", ret);
 697                 return ret;
 698         }
 699
 700         priv->dai_props         = dai_props;
 701         priv->dai_link          = dai_link;
 702         priv->dais              = dais;
 703         priv->codec_conf        = cconf;
 704
 705         card->dai_link          = dai_link;
 706         card->num_links         = li.link;
 707         card->codec_conf        = cconf;
 708         card->num_configs       = li.conf;
 709
 710         ret = graph_parse_of(priv);
 711         if (ret < 0) {
 712                 if (ret != -EPROBE_DEFER)
 713                         dev_err(dev, "parse error %d\n", ret);
 714                 goto err;
 715         }
 716
 717         snd_soc_card_set_drvdata(card, priv);
 718
 719         ret = devm_snd_soc_register_card(dev, card);
 720         if (ret < 0)
 721                 goto err;
 722
 723         return 0;
 724 err:
 725         asoc_simple_card_clean_reference(card);
 726
 727         return ret;
 728 }
 729
 730 static int graph_remove(struct platform_device *pdev)
 731 {
 732         struct snd_soc_card *card = platform_get_drvdata(pdev);
 733
 734         return asoc_simple_card_clean_reference(card);
 735 }
 736
 737 static const struct of_device_id graph_of_match[] = {
 738         { .compatible = "audio-graph-card", },
 739         { .compatible = "audio-graph-scu-card",
 740           .data = (void *)DPCM_SELECTABLE },
 741         {},
 742 };
 743 MODULE_DEVICE_TABLE(of, graph_of_match);
 744
 745 static struct platform_driver graph_card = {
 746         .driver = {
 747                 .name = "asoc-audio-graph-card",
 748                 .pm = &snd_soc_pm_ops,
 749                 .of_match_table = graph_of_match,
 750         },
 751         .probe = graph_probe,
 752         .remove = graph_remove,
 753 };
 754 module_platform_driver(graph_card);
 755
 756 MODULE_ALIAS("platform:asoc-audio-graph-card");
 757 MODULE_LICENSE("GPL v2");
 758 MODULE_DESCRIPTION("ASoC Audio Graph Sound Card");
 759 MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");