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