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