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