sound/soc/generic/simple-card.c

   1 /*
   2  * ASoC simple sound card support
   3  *
   4  * Copyright (C) 2012 Renesas Solutions Corp.
   5  * Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License version 2 as
   9  * published by the Free Software Foundation.
  10  */
  11 #include <linux/clk.h>
  12 #include <linux/device.h>
  13 #include <linux/gpio.h>
  14 #include <linux/module.h>
  15 #include <linux/of.h>
  16 #include <linux/of_gpio.h>
  17 #include <linux/platform_device.h>
  18 #include <linux/string.h>
  19 #include <sound/jack.h>
  20 #include <sound/simple_card.h>
  21 #include <sound/soc-dai.h>
  22 #include <sound/soc.h>
  23
  24 struct asoc_simple_jack {
  25         struct snd_soc_jack jack;
  26         struct snd_soc_jack_pin pin;
  27         struct snd_soc_jack_gpio gpio;
  28 };
  29
  30 struct simple_card_data {
  31         struct snd_soc_card snd_card;
  32         struct simple_dai_props {
  33                 struct asoc_simple_dai cpu_dai;
  34                 struct asoc_simple_dai codec_dai;
  35                 unsigned int mclk_fs;
  36         } *dai_props;
  37         unsigned int mclk_fs;
  38         struct asoc_simple_jack hp_jack;
  39         struct asoc_simple_jack mic_jack;
  40         struct snd_soc_dai_link *dai_link;
  41 };
  42
  43 #define simple_priv_to_dev(priv) ((priv)->snd_card.dev)
  44 #define simple_priv_to_link(priv, i) ((priv)->snd_card.dai_link + (i))
  45 #define simple_priv_to_props(priv, i) ((priv)->dai_props + (i))
  46
  47 #define DAI     "sound-dai"
  48 #define CELL    "#sound-dai-cells"
  49 #define PREFIX  "simple-audio-card,"
  50
  51 #define asoc_simple_card_init_hp(card, sjack, prefix)\
  52         asoc_simple_card_init_jack(card, sjack, 1, prefix)
  53 #define asoc_simple_card_init_mic(card, sjack, prefix)\
  54         asoc_simple_card_init_jack(card, sjack, 0, prefix)
  55 static int asoc_simple_card_init_jack(struct snd_soc_card *card,
  56                                       struct asoc_simple_jack *sjack,
  57                                       int is_hp, char *prefix)
  58 {
  59         struct device *dev = card->dev;
  60         enum of_gpio_flags flags;
  61         char prop[128];
  62         char *pin_name;
  63         char *gpio_name;
  64         int mask;
  65         int det;
  66
  67         sjack->gpio.gpio = -ENOENT;
  68
  69         if (is_hp) {
  70                 snprintf(prop, sizeof(prop), "%shp-det-gpio", prefix);
  71                 pin_name        = "Headphones";
  72                 gpio_name       = "Headphone detection";
  73                 mask            = SND_JACK_HEADPHONE;
  74         } else {
  75                 snprintf(prop, sizeof(prop), "%smic-det-gpio", prefix);
  76                 pin_name        = "Mic Jack";
  77                 gpio_name       = "Mic detection";
  78                 mask            = SND_JACK_MICROPHONE;
  79         }
  80
  81         det = of_get_named_gpio_flags(dev->of_node, prop, 0, &flags);
  82         if (det == -EPROBE_DEFER)
  83                 return -EPROBE_DEFER;
  84
  85         if (gpio_is_valid(det)) {
  86                 sjack->pin.pin          = pin_name;
  87                 sjack->pin.mask         = mask;
  88
  89                 sjack->gpio.name        = gpio_name;
  90                 sjack->gpio.report      = mask;
  91                 sjack->gpio.gpio        = det;
  92                 sjack->gpio.invert      = !!(flags & OF_GPIO_ACTIVE_LOW);
  93                 sjack->gpio.debounce_time = 150;
  94
  95                 snd_soc_card_jack_new(card, pin_name, mask,
  96                                       &sjack->jack,
  97                                       &sjack->pin, 1);
  98
  99                 snd_soc_jack_add_gpios(&sjack->jack, 1,
 100                                        &sjack->gpio);
 101         }
 102
 103         return 0;
 104 }
 105
 106 static void asoc_simple_card_remove_jack(struct asoc_simple_jack *sjack)
 107 {
 108         if (gpio_is_valid(sjack->gpio.gpio))
 109                 snd_soc_jack_free_gpios(&sjack->jack, 1, &sjack->gpio);
 110 }
 111
 112 static int asoc_simple_card_startup(struct snd_pcm_substream *substream)
 113 {
 114         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 115         struct simple_card_data *priv = snd_soc_card_get_drvdata(rtd->card);
 116         struct simple_dai_props *dai_props =
 117                 simple_priv_to_props(priv, rtd->num);
 118         int ret;
 119
 120         ret = clk_prepare_enable(dai_props->cpu_dai.clk);
 121         if (ret)
 122                 return ret;
 123
 124         ret = clk_prepare_enable(dai_props->codec_dai.clk);
 125         if (ret)
 126                 clk_disable_unprepare(dai_props->cpu_dai.clk);
 127
 128         return ret;
 129 }
 130
 131 static void asoc_simple_card_shutdown(struct snd_pcm_substream *substream)
 132 {
 133         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 134         struct simple_card_data *priv = snd_soc_card_get_drvdata(rtd->card);
 135         struct simple_dai_props *dai_props =
 136                 simple_priv_to_props(priv, rtd->num);
 137
 138         clk_disable_unprepare(dai_props->cpu_dai.clk);
 139
 140         clk_disable_unprepare(dai_props->codec_dai.clk);
 141 }
 142
 143 static int asoc_simple_card_hw_params(struct snd_pcm_substream *substream,
 144                                       struct snd_pcm_hw_params *params)
 145 {
 146         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 147         struct snd_soc_dai *codec_dai = rtd->codec_dai;
 148         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 149         struct simple_card_data *priv = snd_soc_card_get_drvdata(rtd->card);
 150         struct simple_dai_props *dai_props =
 151                 simple_priv_to_props(priv, rtd->num);
 152         unsigned int mclk, mclk_fs = 0;
 153         int ret = 0;
 154
 155         if (priv->mclk_fs)
 156                 mclk_fs = priv->mclk_fs;
 157         else if (dai_props->mclk_fs)
 158                 mclk_fs = dai_props->mclk_fs;
 159
 160         if (mclk_fs) {
 161                 mclk = params_rate(params) * mclk_fs;
 162                 ret = snd_soc_dai_set_sysclk(codec_dai, 0, mclk,
 163                                              SND_SOC_CLOCK_IN);
 164                 if (ret && ret != -ENOTSUPP)
 165                         goto err;
 166
 167                 ret = snd_soc_dai_set_sysclk(cpu_dai, 0, mclk,
 168                                              SND_SOC_CLOCK_OUT);
 169                 if (ret && ret != -ENOTSUPP)
 170                         goto err;
 171         }
 172         return 0;
 173 err:
 174         return ret;
 175 }
 176
 177 static const struct snd_soc_ops asoc_simple_card_ops = {
 178         .startup = asoc_simple_card_startup,
 179         .shutdown = asoc_simple_card_shutdown,
 180         .hw_params = asoc_simple_card_hw_params,
 181 };
 182
 183 static int asoc_simple_card_dai_init(struct snd_soc_pcm_runtime *rtd)
 184 {
 185         struct simple_card_data *priv = snd_soc_card_get_drvdata(rtd->card);
 186         struct snd_soc_dai *codec = rtd->codec_dai;
 187         struct snd_soc_dai *cpu = rtd->cpu_dai;
 188         struct simple_dai_props *dai_props =
 189                 simple_priv_to_props(priv, rtd->num);
 190         int ret;
 191
 192         ret = asoc_simple_card_init_dai(codec, &dai_props->codec_dai);
 193         if (ret < 0)
 194                 return ret;
 195
 196         ret = asoc_simple_card_init_dai(cpu, &dai_props->cpu_dai);
 197         if (ret < 0)
 198                 return ret;
 199
 200         ret = asoc_simple_card_init_hp(rtd->card, &priv->hp_jack, PREFIX);
 201         if (ret < 0)
 202                 return ret;
 203
 204         ret = asoc_simple_card_init_mic(rtd->card, &priv->hp_jack, PREFIX);
 205         if (ret < 0)
 206                 return ret;
 207
 208         return 0;
 209 }
 210
 211 static int asoc_simple_card_dai_link_of(struct device_node *node,
 212                                         struct simple_card_data *priv,
 213                                         int idx,
 214                                         bool is_top_level_node)
 215 {
 216         struct device *dev = simple_priv_to_dev(priv);
 217         struct snd_soc_dai_link *dai_link = simple_priv_to_link(priv, idx);
 218         struct simple_dai_props *dai_props = simple_priv_to_props(priv, idx);
 219         struct asoc_simple_dai *cpu_dai = &dai_props->cpu_dai;
 220         struct asoc_simple_dai *codec_dai = &dai_props->codec_dai;
 221         struct device_node *cpu = NULL;
 222         struct device_node *plat = NULL;
 223         struct device_node *codec = NULL;
 224         char prop[128];
 225         char *prefix = "";
 226         int ret, single_cpu;
 227
 228         /* For single DAI link & old style of DT node */
 229         if (is_top_level_node)
 230                 prefix = PREFIX;
 231
 232         snprintf(prop, sizeof(prop), "%scpu", prefix);
 233         cpu = of_get_child_by_name(node, prop);
 234
 235         snprintf(prop, sizeof(prop), "%splat", prefix);
 236         plat = of_get_child_by_name(node, prop);
 237
 238         snprintf(prop, sizeof(prop), "%scodec", prefix);
 239         codec = of_get_child_by_name(node, prop);
 240
 241         if (!cpu || !codec) {
 242                 ret = -EINVAL;
 243                 dev_err(dev, "%s: Can't find %s DT node\n", __func__, prop);
 244                 goto dai_link_of_err;
 245         }
 246
 247         ret = asoc_simple_card_parse_daifmt(dev, node, codec,
 248                                             prefix, &dai_link->dai_fmt);
 249         if (ret < 0)
 250                 goto dai_link_of_err;
 251
 252         of_property_read_u32(node, "mclk-fs", &dai_props->mclk_fs);
 253
 254         ret = asoc_simple_card_parse_cpu(cpu, dai_link,
 255                                          DAI, CELL, &single_cpu);
 256         if (ret < 0)
 257                 goto dai_link_of_err;
 258
 259         ret = asoc_simple_card_parse_codec(codec, dai_link, DAI, CELL);
 260         if (ret < 0)
 261                 goto dai_link_of_err;
 262
 263         ret = asoc_simple_card_parse_platform(plat, dai_link, DAI, CELL);
 264         if (ret < 0)
 265                 goto dai_link_of_err;
 266
 267         ret = snd_soc_of_parse_tdm_slot(cpu,    &cpu_dai->tx_slot_mask,
 268                                                 &cpu_dai->rx_slot_mask,
 269                                                 &cpu_dai->slots,
 270                                                 &cpu_dai->slot_width);
 271         if (ret < 0)
 272                 goto dai_link_of_err;
 273
 274         ret = snd_soc_of_parse_tdm_slot(codec,  &codec_dai->tx_slot_mask,
 275                                                 &codec_dai->rx_slot_mask,
 276                                                 &codec_dai->slots,
 277                                                 &codec_dai->slot_width);
 278         if (ret < 0)
 279                 goto dai_link_of_err;
 280
 281         ret = asoc_simple_card_parse_clk_cpu(cpu, dai_link, cpu_dai);
 282         if (ret < 0)
 283                 goto dai_link_of_err;
 284
 285         ret = asoc_simple_card_parse_clk_codec(codec, dai_link, codec_dai);
 286         if (ret < 0)
 287                 goto dai_link_of_err;
 288
 289         ret = asoc_simple_card_canonicalize_dailink(dai_link);
 290         if (ret < 0)
 291                 goto dai_link_of_err;
 292
 293         ret = asoc_simple_card_set_dailink_name(dev, dai_link,
 294                                                 "%s-%s",
 295                                                 dai_link->cpu_dai_name,
 296                                                 dai_link->codec_dai_name);
 297         if (ret < 0)
 298                 goto dai_link_of_err;
 299
 300         dai_link->ops = &asoc_simple_card_ops;
 301         dai_link->init = asoc_simple_card_dai_init;
 302
 303         dev_dbg(dev, "\tname : %s\n", dai_link->stream_name);
 304         dev_dbg(dev, "\tformat : %04x\n", dai_link->dai_fmt);
 305         dev_dbg(dev, "\tcpu : %s / %d\n",
 306                 dai_link->cpu_dai_name,
 307                 dai_props->cpu_dai.sysclk);
 308         dev_dbg(dev, "\tcodec : %s / %d\n",
 309                 dai_link->codec_dai_name,
 310                 dai_props->codec_dai.sysclk);
 311
 312         asoc_simple_card_canonicalize_cpu(dai_link, single_cpu);
 313
 314 dai_link_of_err:
 315         of_node_put(cpu);
 316         of_node_put(codec);
 317
 318         return ret;
 319 }
 320
 321 static int asoc_simple_card_parse_aux_devs(struct device_node *node,
 322                                            struct simple_card_data *priv)
 323 {
 324         struct device *dev = simple_priv_to_dev(priv);
 325         struct device_node *aux_node;
 326         int i, n, len;
 327
 328         if (!of_find_property(node, PREFIX "aux-devs", &len))
 329                 return 0;               /* Ok to have no aux-devs */
 330
 331         n = len / sizeof(__be32);
 332         if (n <= 0)
 333                 return -EINVAL;
 334
 335         priv->snd_card.aux_dev = devm_kzalloc(dev,
 336                         n * sizeof(*priv->snd_card.aux_dev), GFP_KERNEL);
 337         if (!priv->snd_card.aux_dev)
 338                 return -ENOMEM;
 339
 340         for (i = 0; i < n; i++) {
 341                 aux_node = of_parse_phandle(node, PREFIX "aux-devs", i);
 342                 if (!aux_node)
 343                         return -EINVAL;
 344                 priv->snd_card.aux_dev[i].codec_of_node = aux_node;
 345         }
 346
 347         priv->snd_card.num_aux_devs = n;
 348         return 0;
 349 }
 350
 351 static int asoc_simple_card_parse_of(struct device_node *node,
 352                                      struct simple_card_data *priv)
 353 {
 354         struct device *dev = simple_priv_to_dev(priv);
 355         struct device_node *dai_link;
 356         int ret;
 357
 358         if (!node)
 359                 return -EINVAL;
 360
 361         dai_link = of_get_child_by_name(node, PREFIX "dai-link");
 362
 363         /* The off-codec widgets */
 364         if (of_property_read_bool(node, PREFIX "widgets")) {
 365                 ret = snd_soc_of_parse_audio_simple_widgets(&priv->snd_card,
 366                                         PREFIX "widgets");
 367                 if (ret)
 368                         goto card_parse_end;
 369         }
 370
 371         /* DAPM routes */
 372         if (of_property_read_bool(node, PREFIX "routing")) {
 373                 ret = snd_soc_of_parse_audio_routing(&priv->snd_card,
 374                                         PREFIX "routing");
 375                 if (ret)
 376                         goto card_parse_end;
 377         }
 378
 379         /* Factor to mclk, used in hw_params() */
 380         of_property_read_u32(node, PREFIX "mclk-fs", &priv->mclk_fs);
 381
 382         /* Single/Muti DAI link(s) & New style of DT node */
 383         if (dai_link) {
 384                 struct device_node *np = NULL;
 385                 int i = 0;
 386
 387                 for_each_child_of_node(node, np) {
 388                         dev_dbg(dev, "\tlink %d:\n", i);
 389                         ret = asoc_simple_card_dai_link_of(np, priv,
 390                                                            i, false);
 391                         if (ret < 0) {
 392                                 of_node_put(np);
 393                                 goto card_parse_end;
 394                         }
 395                         i++;
 396                 }
 397         } else {
 398                 /* For single DAI link & old style of DT node */
 399                 ret = asoc_simple_card_dai_link_of(node, priv, 0, true);
 400                 if (ret < 0)
 401                         goto card_parse_end;
 402         }
 403
 404         ret = asoc_simple_card_parse_card_name(&priv->snd_card, PREFIX);
 405         if (ret < 0)
 406                 goto card_parse_end;
 407
 408         ret = asoc_simple_card_parse_aux_devs(node, priv);
 409
 410 card_parse_end:
 411         of_node_put(dai_link);
 412
 413         return ret;
 414 }
 415
 416 static int asoc_simple_card_probe(struct platform_device *pdev)
 417 {
 418         struct simple_card_data *priv;
 419         struct snd_soc_dai_link *dai_link;
 420         struct simple_dai_props *dai_props;
 421         struct device_node *np = pdev->dev.of_node;
 422         struct device *dev = &pdev->dev;
 423         int num, ret;
 424
 425         /* Get the number of DAI links */
 426         if (np && of_get_child_by_name(np, PREFIX "dai-link"))
 427                 num = of_get_child_count(np);
 428         else
 429                 num = 1;
 430
 431         /* Allocate the private data and the DAI link array */
 432         priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
 433         if (!priv)
 434                 return -ENOMEM;
 435
 436         dai_props = devm_kzalloc(dev, sizeof(*dai_props) * num, GFP_KERNEL);
 437         dai_link  = devm_kzalloc(dev, sizeof(*dai_link)  * num, GFP_KERNEL);
 438         if (!dai_props || !dai_link)
 439                 return -ENOMEM;
 440
 441         priv->dai_props                 = dai_props;
 442         priv->dai_link                  = dai_link;
 443
 444         /* Init snd_soc_card */
 445         priv->snd_card.owner            = THIS_MODULE;
 446         priv->snd_card.dev              = dev;
 447         priv->snd_card.dai_link         = priv->dai_link;
 448         priv->snd_card.num_links        = num;
 449
 450         if (np && of_device_is_available(np)) {
 451
 452                 ret = asoc_simple_card_parse_of(np, priv);
 453                 if (ret < 0) {
 454                         if (ret != -EPROBE_DEFER)
 455                                 dev_err(dev, "parse error %d\n", ret);
 456                         goto err;
 457                 }
 458
 459         } else {
 460                 struct asoc_simple_card_info *cinfo;
 461
 462                 cinfo = dev->platform_data;
 463                 if (!cinfo) {
 464                         dev_err(dev, "no info for asoc-simple-card\n");
 465                         return -EINVAL;
 466                 }
 467
 468                 if (!cinfo->name ||
 469                     !cinfo->codec_dai.name ||
 470                     !cinfo->codec ||
 471                     !cinfo->platform ||
 472                     !cinfo->cpu_dai.name) {
 473                         dev_err(dev, "insufficient asoc_simple_card_info settings\n");
 474                         return -EINVAL;
 475                 }
 476
 477                 priv->snd_card.name     = (cinfo->card) ? cinfo->card : cinfo->name;
 478                 dai_link->name          = cinfo->name;
 479                 dai_link->stream_name   = cinfo->name;
 480                 dai_link->platform_name = cinfo->platform;
 481                 dai_link->codec_name    = cinfo->codec;
 482                 dai_link->cpu_dai_name  = cinfo->cpu_dai.name;
 483                 dai_link->codec_dai_name = cinfo->codec_dai.name;
 484                 dai_link->dai_fmt       = cinfo->daifmt;
 485                 dai_link->init          = asoc_simple_card_dai_init;
 486                 memcpy(&priv->dai_props->cpu_dai, &cinfo->cpu_dai,
 487                                         sizeof(priv->dai_props->cpu_dai));
 488                 memcpy(&priv->dai_props->codec_dai, &cinfo->codec_dai,
 489                                         sizeof(priv->dai_props->codec_dai));
 490         }
 491
 492         snd_soc_card_set_drvdata(&priv->snd_card, priv);
 493
 494         ret = devm_snd_soc_register_card(&pdev->dev, &priv->snd_card);
 495         if (ret >= 0)
 496                 return ret;
 497 err:
 498         asoc_simple_card_clean_reference(&priv->snd_card);
 499
 500         return ret;
 501 }
 502
 503 static int asoc_simple_card_remove(struct platform_device *pdev)
 504 {
 505         struct snd_soc_card *card = platform_get_drvdata(pdev);
 506         struct simple_card_data *priv = snd_soc_card_get_drvdata(card);
 507
 508         asoc_simple_card_remove_jack(&priv->hp_jack);
 509         asoc_simple_card_remove_jack(&priv->mic_jack);
 510
 511         return asoc_simple_card_clean_reference(card);
 512 }
 513
 514 static const struct of_device_id asoc_simple_of_match[] = {
 515         { .compatible = "simple-audio-card", },
 516         {},
 517 };
 518 MODULE_DEVICE_TABLE(of, asoc_simple_of_match);
 519
 520 static struct platform_driver asoc_simple_card = {
 521         .driver = {
 522                 .name = "asoc-simple-card",
 523                 .pm = &snd_soc_pm_ops,
 524                 .of_match_table = asoc_simple_of_match,
 525         },
 526         .probe = asoc_simple_card_probe,
 527         .remove = asoc_simple_card_remove,
 528 };
 529
 530 module_platform_driver(asoc_simple_card);
 531
 532 MODULE_ALIAS("platform:asoc-simple-card");
 533 MODULE_LICENSE("GPL v2");
 534 MODULE_DESCRIPTION("ASoC Simple Sound Card");
 535 MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");