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 audio_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(audio_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 audio_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(audio_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 = audio_graph_card_probe; 740 741 if (of_device_get_match_data(dev)) 742 priv->dpcm_selectable = 1; 743 744 return audio_graph_parse_of(priv, dev); 745 } 746 747 int audio_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 EXPORT_SYMBOL_GPL(audio_graph_remove); 754 755 static const struct of_device_id graph_of_match[] = { 756 { .compatible = "audio-graph-card", }, 757 { .compatible = "audio-graph-scu-card", 758 .data = (void *)DPCM_SELECTABLE }, 759 {}, 760 }; 761 MODULE_DEVICE_TABLE(of, graph_of_match); 762 763 static struct platform_driver graph_card = { 764 .driver = { 765 .name = "asoc-audio-graph-card", 766 .pm = &snd_soc_pm_ops, 767 .of_match_table = graph_of_match, 768 }, 769 .probe = graph_probe, 770 .remove = audio_graph_remove, 771 }; 772 module_platform_driver(graph_card); 773 774 MODULE_ALIAS("platform:asoc-audio-graph-card"); 775 MODULE_LICENSE("GPL v2"); 776 MODULE_DESCRIPTION("ASoC Audio Graph Sound Card"); 777 MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>"); 778