sound/soc/meson/meson-card-utils.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 //
   3 // Copyright (c) 2020 BayLibre, SAS.
   4 // Author: Jerome Brunet <jbrunet@baylibre.com>
   5
   6 #include <linux/module.h>
   7 #include <linux/of_platform.h>
   8 #include <sound/soc.h>
   9
  10 #include "meson-card.h"
  11
  12 int meson_card_i2s_set_sysclk(struct snd_pcm_substream *substream,
  13                               struct snd_pcm_hw_params *params,
  14                               unsigned int mclk_fs)
  15 {
  16         struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
  17         struct snd_soc_dai *codec_dai;
  18         unsigned int mclk;
  19         int ret, i;
  20
  21         if (!mclk_fs)
  22                 return 0;
  23
  24         mclk = params_rate(params) * mclk_fs;
  25
  26         for_each_rtd_codec_dais(rtd, i, codec_dai) {
  27                 ret = snd_soc_dai_set_sysclk(codec_dai, 0, mclk,
  28                                              SND_SOC_CLOCK_IN);
  29                 if (ret && ret != -ENOTSUPP)
  30                         return ret;
  31         }
  32
  33         ret = snd_soc_dai_set_sysclk(asoc_rtd_to_cpu(rtd, 0), 0, mclk,
  34                                      SND_SOC_CLOCK_OUT);
  35         if (ret && ret != -ENOTSUPP)
  36                 return ret;
  37
  38         return 0;
  39 }
  40 EXPORT_SYMBOL_GPL(meson_card_i2s_set_sysclk);
  41
  42 int meson_card_reallocate_links(struct snd_soc_card *card,
  43                                 unsigned int num_links)
  44 {
  45         struct meson_card *priv = snd_soc_card_get_drvdata(card);
  46         struct snd_soc_dai_link *links;
  47         void **ldata;
  48
  49         links = krealloc(priv->card.dai_link,
  50                          num_links * sizeof(*priv->card.dai_link),
  51                          GFP_KERNEL | __GFP_ZERO);
  52         if (!links)
  53                 goto err_links;
  54
  55         ldata = krealloc(priv->link_data,
  56                          num_links * sizeof(*priv->link_data),
  57                          GFP_KERNEL | __GFP_ZERO);
  58         if (!ldata)
  59                 goto err_ldata;
  60
  61         priv->card.dai_link = links;
  62         priv->link_data = ldata;
  63         priv->card.num_links = num_links;
  64         return 0;
  65
  66 err_ldata:
  67         kfree(links);
  68 err_links:
  69         dev_err(priv->card.dev, "failed to allocate links\n");
  70         return -ENOMEM;
  71
  72 }
  73 EXPORT_SYMBOL_GPL(meson_card_reallocate_links);
  74
  75 int meson_card_parse_dai(struct snd_soc_card *card,
  76                          struct device_node *node,
  77                          struct device_node **dai_of_node,
  78                          const char **dai_name)
  79 {
  80         struct of_phandle_args args;
  81         int ret;
  82
  83         if (!dai_name || !dai_of_node || !node)
  84                 return -EINVAL;
  85
  86         ret = of_parse_phandle_with_args(node, "sound-dai",
  87                                          "#sound-dai-cells", 0, &args);
  88         if (ret) {
  89                 if (ret != -EPROBE_DEFER)
  90                         dev_err(card->dev, "can't parse dai %d\n", ret);
  91                 return ret;
  92         }
  93         *dai_of_node = args.np;
  94
  95         return snd_soc_get_dai_name(&args, dai_name);
  96 }
  97 EXPORT_SYMBOL_GPL(meson_card_parse_dai);
  98
  99 static int meson_card_set_link_name(struct snd_soc_card *card,
 100                                     struct snd_soc_dai_link *link,
 101                                     struct device_node *node,
 102                                     const char *prefix)
 103 {
 104         char *name = devm_kasprintf(card->dev, GFP_KERNEL, "%s.%s",
 105                                     prefix, node->full_name);
 106         if (!name)
 107                 return -ENOMEM;
 108
 109         link->name = name;
 110         link->stream_name = name;
 111
 112         return 0;
 113 }
 114
 115 unsigned int meson_card_parse_daifmt(struct device_node *node,
 116                                      struct device_node *cpu_node)
 117 {
 118         struct device_node *bitclkmaster = NULL;
 119         struct device_node *framemaster = NULL;
 120         unsigned int daifmt;
 121
 122         daifmt = snd_soc_of_parse_daifmt(node, "",
 123                                          &bitclkmaster, &framemaster);
 124         daifmt &= ~SND_SOC_DAIFMT_MASTER_MASK;
 125
 126         /* If no master is provided, default to cpu master */
 127         if (!bitclkmaster || bitclkmaster == cpu_node) {
 128                 daifmt |= (!framemaster || framemaster == cpu_node) ?
 129                         SND_SOC_DAIFMT_CBS_CFS : SND_SOC_DAIFMT_CBS_CFM;
 130         } else {
 131                 daifmt |= (!framemaster || framemaster == cpu_node) ?
 132                         SND_SOC_DAIFMT_CBM_CFS : SND_SOC_DAIFMT_CBM_CFM;
 133         }
 134
 135         of_node_put(bitclkmaster);
 136         of_node_put(framemaster);
 137
 138         return daifmt;
 139 }
 140 EXPORT_SYMBOL_GPL(meson_card_parse_daifmt);
 141
 142 int meson_card_set_be_link(struct snd_soc_card *card,
 143                            struct snd_soc_dai_link *link,
 144                            struct device_node *node)
 145 {
 146         struct snd_soc_dai_link_component *codec;
 147         struct device_node *np;
 148         int ret, num_codecs;
 149
 150         num_codecs = of_get_child_count(node);
 151         if (!num_codecs) {
 152                 dev_err(card->dev, "be link %s has no codec\n",
 153                         node->full_name);
 154                 return -EINVAL;
 155         }
 156
 157         codec = devm_kcalloc(card->dev, num_codecs, sizeof(*codec), GFP_KERNEL);
 158         if (!codec)
 159                 return -ENOMEM;
 160
 161         link->codecs = codec;
 162         link->num_codecs = num_codecs;
 163
 164         for_each_child_of_node(node, np) {
 165                 ret = meson_card_parse_dai(card, np, &codec->of_node,
 166                                            &codec->dai_name);
 167                 if (ret) {
 168                         of_node_put(np);
 169                         return ret;
 170                 }
 171
 172                 codec++;
 173         }
 174
 175         ret = meson_card_set_link_name(card, link, node, "be");
 176         if (ret)
 177                 dev_err(card->dev, "error setting %pOFn link name\n", np);
 178
 179         return ret;
 180 }
 181 EXPORT_SYMBOL_GPL(meson_card_set_be_link);
 182
 183 int meson_card_set_fe_link(struct snd_soc_card *card,
 184                            struct snd_soc_dai_link *link,
 185                            struct device_node *node,
 186                            bool is_playback)
 187 {
 188         struct snd_soc_dai_link_component *codec;
 189
 190         codec = devm_kzalloc(card->dev, sizeof(*codec), GFP_KERNEL);
 191         if (!codec)
 192                 return -ENOMEM;
 193
 194         link->codecs = codec;
 195         link->num_codecs = 1;
 196
 197         link->dynamic = 1;
 198         link->dpcm_merged_format = 1;
 199         link->dpcm_merged_chan = 1;
 200         link->dpcm_merged_rate = 1;
 201         link->codecs->dai_name = "snd-soc-dummy-dai";
 202         link->codecs->name = "snd-soc-dummy";
 203
 204         if (is_playback)
 205                 link->dpcm_playback = 1;
 206         else
 207                 link->dpcm_capture = 1;
 208
 209         return meson_card_set_link_name(card, link, node, "fe");
 210 }
 211 EXPORT_SYMBOL_GPL(meson_card_set_fe_link);
 212
 213 static int meson_card_add_links(struct snd_soc_card *card)
 214 {
 215         struct meson_card *priv = snd_soc_card_get_drvdata(card);
 216         struct device_node *node = card->dev->of_node;
 217         struct device_node *np;
 218         int num, i, ret;
 219
 220         num = of_get_child_count(node);
 221         if (!num) {
 222                 dev_err(card->dev, "card has no links\n");
 223                 return -EINVAL;
 224         }
 225
 226         ret = meson_card_reallocate_links(card, num);
 227         if (ret)
 228                 return ret;
 229
 230         i = 0;
 231         for_each_child_of_node(node, np) {
 232                 ret = priv->match_data->add_link(card, np, &i);
 233                 if (ret) {
 234                         of_node_put(np);
 235                         return ret;
 236                 }
 237
 238                 i++;
 239         }
 240
 241         return 0;
 242 }
 243
 244 static int meson_card_parse_of_optional(struct snd_soc_card *card,
 245                                         const char *propname,
 246                                         int (*func)(struct snd_soc_card *c,
 247                                                     const char *p))
 248 {
 249         /* If property is not provided, don't fail ... */
 250         if (!of_property_read_bool(card->dev->of_node, propname))
 251                 return 0;
 252
 253         /* ... but do fail if it is provided and the parsing fails */
 254         return func(card, propname);
 255 }
 256
 257 static void meson_card_clean_references(struct meson_card *priv)
 258 {
 259         struct snd_soc_card *card = &priv->card;
 260         struct snd_soc_dai_link *link;
 261         struct snd_soc_dai_link_component *codec;
 262         struct snd_soc_aux_dev *aux;
 263         int i, j;
 264
 265         if (card->dai_link) {
 266                 for_each_card_prelinks(card, i, link) {
 267                         if (link->cpus)
 268                                 of_node_put(link->cpus->of_node);
 269                         for_each_link_codecs(link, j, codec)
 270                                 of_node_put(codec->of_node);
 271                 }
 272         }
 273
 274         if (card->aux_dev) {
 275                 for_each_card_pre_auxs(card, i, aux)
 276                         of_node_put(aux->dlc.of_node);
 277         }
 278
 279         kfree(card->dai_link);
 280         kfree(priv->link_data);
 281 }
 282
 283 int meson_card_probe(struct platform_device *pdev)
 284 {
 285         const struct meson_card_match_data *data;
 286         struct device *dev = &pdev->dev;
 287         struct meson_card *priv;
 288         int ret;
 289
 290         data = of_device_get_match_data(dev);
 291         if (!data) {
 292                 dev_err(dev, "failed to match device\n");
 293                 return -ENODEV;
 294         }
 295
 296         priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
 297         if (!priv)
 298                 return -ENOMEM;
 299
 300         platform_set_drvdata(pdev, priv);
 301         snd_soc_card_set_drvdata(&priv->card, priv);
 302
 303         priv->card.owner = THIS_MODULE;
 304         priv->card.dev = dev;
 305         priv->match_data = data;
 306
 307         ret = snd_soc_of_parse_card_name(&priv->card, "model");
 308         if (ret < 0)
 309                 return ret;
 310
 311         ret = meson_card_parse_of_optional(&priv->card, "audio-routing",
 312                                            snd_soc_of_parse_audio_routing);
 313         if (ret) {
 314                 dev_err(dev, "error while parsing routing\n");
 315                 return ret;
 316         }
 317
 318         ret = meson_card_parse_of_optional(&priv->card, "audio-widgets",
 319                                            snd_soc_of_parse_audio_simple_widgets);
 320         if (ret) {
 321                 dev_err(dev, "error while parsing widgets\n");
 322                 return ret;
 323         }
 324
 325         ret = meson_card_add_links(&priv->card);
 326         if (ret)
 327                 goto out_err;
 328
 329         ret = snd_soc_of_parse_aux_devs(&priv->card, "audio-aux-devs");
 330         if (ret)
 331                 goto out_err;
 332
 333         ret = devm_snd_soc_register_card(dev, &priv->card);
 334         if (ret)
 335                 goto out_err;
 336
 337         return 0;
 338
 339 out_err:
 340         meson_card_clean_references(priv);
 341         return ret;
 342 }
 343 EXPORT_SYMBOL_GPL(meson_card_probe);
 344
 345 int meson_card_remove(struct platform_device *pdev)
 346 {
 347         struct meson_card *priv = platform_get_drvdata(pdev);
 348
 349         meson_card_clean_references(priv);
 350
 351         return 0;
 352 }
 353 EXPORT_SYMBOL_GPL(meson_card_remove);
 354
 355 MODULE_DESCRIPTION("Amlogic Sound Card Utils");
 356 MODULE_AUTHOR("Jerome Brunet <jbrunet@baylibre.com>");
 357 MODULE_LICENSE("GPL v2");