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 = snd_soc_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(snd_soc_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 snd_soc_dai_link_component *dlc)
  78 {
  79         int ret;
  80
  81         if (!dlc || !node)
  82                 return -EINVAL;
  83
  84         ret = snd_soc_of_get_dlc(node, NULL, dlc, 0);
  85         if (ret)
  86                 return dev_err_probe(card->dev, ret, "can't parse dai\n");
  87
  88         return ret;
  89 }
  90 EXPORT_SYMBOL_GPL(meson_card_parse_dai);
  91
  92 static int meson_card_set_link_name(struct snd_soc_card *card,
  93                                     struct snd_soc_dai_link *link,
  94                                     struct device_node *node,
  95                                     const char *prefix)
  96 {
  97         char *name = devm_kasprintf(card->dev, GFP_KERNEL, "%s.%s",
  98                                     prefix, node->full_name);
  99         if (!name)
 100                 return -ENOMEM;
 101
 102         link->name = name;
 103         link->stream_name = name;
 104
 105         return 0;
 106 }
 107
 108 unsigned int meson_card_parse_daifmt(struct device_node *node,
 109                                      struct device_node *cpu_node)
 110 {
 111         struct device_node *bitclkmaster = NULL;
 112         struct device_node *framemaster = NULL;
 113         unsigned int daifmt;
 114
 115         daifmt = snd_soc_daifmt_parse_format(node, NULL);
 116
 117         snd_soc_daifmt_parse_clock_provider_as_phandle(node, NULL, &bitclkmaster, &framemaster);
 118
 119         /* If no master is provided, default to cpu master */
 120         if (!bitclkmaster || bitclkmaster == cpu_node) {
 121                 daifmt |= (!framemaster || framemaster == cpu_node) ?
 122                         SND_SOC_DAIFMT_CBS_CFS : SND_SOC_DAIFMT_CBS_CFM;
 123         } else {
 124                 daifmt |= (!framemaster || framemaster == cpu_node) ?
 125                         SND_SOC_DAIFMT_CBM_CFS : SND_SOC_DAIFMT_CBM_CFM;
 126         }
 127
 128         of_node_put(bitclkmaster);
 129         of_node_put(framemaster);
 130
 131         return daifmt;
 132 }
 133 EXPORT_SYMBOL_GPL(meson_card_parse_daifmt);
 134
 135 int meson_card_set_be_link(struct snd_soc_card *card,
 136                            struct snd_soc_dai_link *link,
 137                            struct device_node *node)
 138 {
 139         struct snd_soc_dai_link_component *codec;
 140         struct device_node *np;
 141         int ret, num_codecs;
 142
 143         num_codecs = of_get_child_count(node);
 144         if (!num_codecs) {
 145                 dev_err(card->dev, "be link %s has no codec\n",
 146                         node->full_name);
 147                 return -EINVAL;
 148         }
 149
 150         codec = devm_kcalloc(card->dev, num_codecs, sizeof(*codec), GFP_KERNEL);
 151         if (!codec)
 152                 return -ENOMEM;
 153
 154         link->codecs = codec;
 155         link->num_codecs = num_codecs;
 156
 157         for_each_child_of_node(node, np) {
 158                 ret = meson_card_parse_dai(card, np, codec);
 159                 if (ret) {
 160                         of_node_put(np);
 161                         return ret;
 162                 }
 163
 164                 codec++;
 165         }
 166
 167         ret = meson_card_set_link_name(card, link, node, "be");
 168         if (ret)
 169                 dev_err(card->dev, "error setting %pOFn link name\n", np);
 170
 171         return ret;
 172 }
 173 EXPORT_SYMBOL_GPL(meson_card_set_be_link);
 174
 175 int meson_card_set_fe_link(struct snd_soc_card *card,
 176                            struct snd_soc_dai_link *link,
 177                            struct device_node *node,
 178                            bool is_playback)
 179 {
 180         link->codecs = &snd_soc_dummy_dlc;
 181         link->num_codecs = 1;
 182
 183         link->dynamic = 1;
 184         link->dpcm_merged_format = 1;
 185         link->dpcm_merged_chan = 1;
 186         link->dpcm_merged_rate = 1;
 187
 188         if (is_playback)
 189                 link->playback_only = 1;
 190         else
 191                 link->capture_only = 1;
 192
 193         return meson_card_set_link_name(card, link, node, "fe");
 194 }
 195 EXPORT_SYMBOL_GPL(meson_card_set_fe_link);
 196
 197 static int meson_card_add_links(struct snd_soc_card *card)
 198 {
 199         struct meson_card *priv = snd_soc_card_get_drvdata(card);
 200         struct device_node *node = card->dev->of_node;
 201         struct device_node *np;
 202         int num, i, ret;
 203
 204         num = of_get_child_count(node);
 205         if (!num) {
 206                 dev_err(card->dev, "card has no links\n");
 207                 return -EINVAL;
 208         }
 209
 210         ret = meson_card_reallocate_links(card, num);
 211         if (ret)
 212                 return ret;
 213
 214         i = 0;
 215         for_each_child_of_node(node, np) {
 216                 ret = priv->match_data->add_link(card, np, &i);
 217                 if (ret) {
 218                         of_node_put(np);
 219                         return ret;
 220                 }
 221
 222                 i++;
 223         }
 224
 225         return 0;
 226 }
 227
 228 static int meson_card_parse_of_optional(struct snd_soc_card *card,
 229                                         const char *propname,
 230                                         int (*func)(struct snd_soc_card *c,
 231                                                     const char *p))
 232 {
 233         /* If property is not provided, don't fail ... */
 234         if (!of_property_read_bool(card->dev->of_node, propname))
 235                 return 0;
 236
 237         /* ... but do fail if it is provided and the parsing fails */
 238         return func(card, propname);
 239 }
 240
 241 static void meson_card_clean_references(struct meson_card *priv)
 242 {
 243         struct snd_soc_card *card = &priv->card;
 244         struct snd_soc_dai_link *link;
 245         struct snd_soc_dai_link_component *codec;
 246         struct snd_soc_aux_dev *aux;
 247         int i, j;
 248
 249         if (card->dai_link) {
 250                 for_each_card_prelinks(card, i, link) {
 251                         if (link->cpus)
 252                                 of_node_put(link->cpus->of_node);
 253                         for_each_link_codecs(link, j, codec)
 254                                 of_node_put(codec->of_node);
 255                 }
 256         }
 257
 258         if (card->aux_dev) {
 259                 for_each_card_pre_auxs(card, i, aux)
 260                         of_node_put(aux->dlc.of_node);
 261         }
 262
 263         kfree(card->dai_link);
 264         kfree(priv->link_data);
 265 }
 266
 267 int meson_card_probe(struct platform_device *pdev)
 268 {
 269         const struct meson_card_match_data *data;
 270         struct device *dev = &pdev->dev;
 271         struct meson_card *priv;
 272         int ret;
 273
 274         data = of_device_get_match_data(dev);
 275         if (!data) {
 276                 dev_err(dev, "failed to match device\n");
 277                 return -ENODEV;
 278         }
 279
 280         priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
 281         if (!priv)
 282                 return -ENOMEM;
 283
 284         platform_set_drvdata(pdev, priv);
 285         snd_soc_card_set_drvdata(&priv->card, priv);
 286
 287         priv->card.owner = THIS_MODULE;
 288         priv->card.dev = dev;
 289         priv->card.driver_name = dev->driver->name;
 290         priv->match_data = data;
 291
 292         ret = snd_soc_of_parse_card_name(&priv->card, "model");
 293         if (ret < 0)
 294                 return ret;
 295
 296         ret = meson_card_parse_of_optional(&priv->card, "audio-routing",
 297                                            snd_soc_of_parse_audio_routing);
 298         if (ret) {
 299                 dev_err(dev, "error while parsing routing\n");
 300                 return ret;
 301         }
 302
 303         ret = meson_card_parse_of_optional(&priv->card, "audio-widgets",
 304                                            snd_soc_of_parse_audio_simple_widgets);
 305         if (ret) {
 306                 dev_err(dev, "error while parsing widgets\n");
 307                 return ret;
 308         }
 309
 310         ret = meson_card_add_links(&priv->card);
 311         if (ret)
 312                 goto out_err;
 313
 314         ret = snd_soc_of_parse_aux_devs(&priv->card, "audio-aux-devs");
 315         if (ret)
 316                 goto out_err;
 317
 318         ret = devm_snd_soc_register_card(dev, &priv->card);
 319         if (ret)
 320                 goto out_err;
 321
 322         return 0;
 323
 324 out_err:
 325         meson_card_clean_references(priv);
 326         return ret;
 327 }
 328 EXPORT_SYMBOL_GPL(meson_card_probe);
 329
 330 void meson_card_remove(struct platform_device *pdev)
 331 {
 332         struct meson_card *priv = platform_get_drvdata(pdev);
 333
 334         meson_card_clean_references(priv);
 335 }
 336 EXPORT_SYMBOL_GPL(meson_card_remove);
 337
 338 MODULE_DESCRIPTION("Amlogic Sound Card Utils");
 339 MODULE_AUTHOR("Jerome Brunet <jbrunet@baylibre.com>");
 340 MODULE_LICENSE("GPL v2");