meson-card-utils.c 8.0 KB

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