sound/soc/meson/meson-card-utils.c - linux - Git at Google

 // SPDX-License-Identifier: GPL-2.0
 //
 // Copyright (c) 2020 BayLibre, SAS.
 // Author: Jerome Brunet <jbrunet@baylibre.com>

 #include <linux/module.h>
 #include <linux/of_platform.h>
 #include <sound/soc.h>

 #include "meson-card.h"

 int meson_card_i2s_set_sysclk(struct snd_pcm_substream *substream,
 			      struct snd_pcm_hw_params *params,
 			      unsigned int mclk_fs)
 {
 	struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
 	struct snd_soc_dai *codec_dai;
 	unsigned int mclk;
 	int ret, i;

 	if (!mclk_fs)
 		return 0;

 	mclk = params_rate(params) * mclk_fs;

 	for_each_rtd_codec_dais(rtd, i, codec_dai) {
 		ret = snd_soc_dai_set_sysclk(codec_dai, 0, mclk,
 					     SND_SOC_CLOCK_IN);
 		if (ret && ret != -ENOTSUPP)
 			return ret;
 	}

 	ret = snd_soc_dai_set_sysclk(asoc_rtd_to_cpu(rtd, 0), 0, mclk,
 				     SND_SOC_CLOCK_OUT);
 	if (ret && ret != -ENOTSUPP)
 		return ret;

 	return 0;
 }
 EXPORT_SYMBOL_GPL(meson_card_i2s_set_sysclk);

 int meson_card_reallocate_links(struct snd_soc_card *card,
 				unsigned int num_links)
 {
 	struct meson_card *priv = snd_soc_card_get_drvdata(card);
 	struct snd_soc_dai_link *links;
 	void **ldata;

 	links = krealloc(priv->card.dai_link,
 			 num_links * sizeof(*priv->card.dai_link),
 			 GFP_KERNEL | __GFP_ZERO);
 	if (!links)
 		goto err_links;

 	ldata = krealloc(priv->link_data,
 			 num_links * sizeof(*priv->link_data),
 			 GFP_KERNEL | __GFP_ZERO);
 	if (!ldata)
 		goto err_ldata;

 	priv->card.dai_link = links;
 	priv->link_data = ldata;
 	priv->card.num_links = num_links;
 	return 0;

 err_ldata:
 	kfree(links);
 err_links:
 	dev_err(priv->card.dev, "failed to allocate links\n");
 	return -ENOMEM;

 }
 EXPORT_SYMBOL_GPL(meson_card_reallocate_links);

 int meson_card_parse_dai(struct snd_soc_card *card,
 			 struct device_node *node,
 			 struct device_node **dai_of_node,
 			 const char **dai_name)
 {
 	struct of_phandle_args args;
 	int ret;

 	if (!dai_name || !dai_of_node || !node)
 		return -EINVAL;

 	ret = of_parse_phandle_with_args(node, "sound-dai",
 					 "#sound-dai-cells", 0, &args);
 	if (ret)
 		return dev_err_probe(card->dev, ret, "can't parse dai\n");

 	*dai_of_node = args.np;

 	return snd_soc_get_dai_name(&args, dai_name);
 }
 EXPORT_SYMBOL_GPL(meson_card_parse_dai);

 static int meson_card_set_link_name(struct snd_soc_card *card,
 				    struct snd_soc_dai_link *link,
 				    struct device_node *node,
 				    const char *prefix)
 {
 	char *name = devm_kasprintf(card->dev, GFP_KERNEL, "%s.%s",
 				    prefix, node->full_name);
 	if (!name)
 		return -ENOMEM;

 	link->name = name;
 	link->stream_name = name;

 	return 0;
 }

 unsigned int meson_card_parse_daifmt(struct device_node *node,
 				     struct device_node *cpu_node)
 {
 	struct device_node *bitclkmaster = NULL;
 	struct device_node *framemaster = NULL;
 	unsigned int daifmt;

 	daifmt = snd_soc_daifmt_parse_format(node, NULL);

 	snd_soc_daifmt_parse_clock_provider_as_phandle(node, NULL, &bitclkmaster, &framemaster);

 	/* If no master is provided, default to cpu master */
 	if (!bitclkmaster || bitclkmaster == cpu_node) {
 		daifmt |= (!framemaster || framemaster == cpu_node) ?
 			SND_SOC_DAIFMT_CBS_CFS : SND_SOC_DAIFMT_CBS_CFM;
 	} else {
 		daifmt |= (!framemaster || framemaster == cpu_node) ?
 			SND_SOC_DAIFMT_CBM_CFS : SND_SOC_DAIFMT_CBM_CFM;
 	}

 	of_node_put(bitclkmaster);
 	of_node_put(framemaster);

 	return daifmt;
 }
 EXPORT_SYMBOL_GPL(meson_card_parse_daifmt);

 int meson_card_set_be_link(struct snd_soc_card *card,
 			   struct snd_soc_dai_link *link,
 			   struct device_node *node)
 {
 	struct snd_soc_dai_link_component *codec;
 	struct device_node *np;
 	int ret, num_codecs;

 	num_codecs = of_get_child_count(node);
 	if (!num_codecs) {
 		dev_err(card->dev, "be link %s has no codec\n",
 			node->full_name);
 		return -EINVAL;
 	}

 	codec = devm_kcalloc(card->dev, num_codecs, sizeof(*codec), GFP_KERNEL);
 	if (!codec)
 		return -ENOMEM;

 	link->codecs = codec;
 	link->num_codecs = num_codecs;

 	for_each_child_of_node(node, np) {
 		ret = meson_card_parse_dai(card, np, &codec->of_node,
 					   &codec->dai_name);
 		if (ret) {
 			of_node_put(np);
 			return ret;
 		}

 		codec++;
 	}

 	ret = meson_card_set_link_name(card, link, node, "be");
 	if (ret)
 		dev_err(card->dev, "error setting %pOFn link name\n", np);

 	return ret;
 }
 EXPORT_SYMBOL_GPL(meson_card_set_be_link);

 int meson_card_set_fe_link(struct snd_soc_card *card,
 			   struct snd_soc_dai_link *link,
 			   struct device_node *node,
 			   bool is_playback)
 {
 	struct snd_soc_dai_link_component *codec;

 	codec = devm_kzalloc(card->dev, sizeof(*codec), GFP_KERNEL);
 	if (!codec)
 		return -ENOMEM;

 	link->codecs = codec;
 	link->num_codecs = 1;

 	link->dynamic = 1;
 	link->dpcm_merged_format = 1;
 	link->dpcm_merged_chan = 1;
 	link->dpcm_merged_rate = 1;
 	link->codecs->dai_name = "snd-soc-dummy-dai";
 	link->codecs->name = "snd-soc-dummy";

 	if (is_playback)
 		link->dpcm_playback = 1;
 	else
 		link->dpcm_capture = 1;

 	return meson_card_set_link_name(card, link, node, "fe");
 }
 EXPORT_SYMBOL_GPL(meson_card_set_fe_link);

 static int meson_card_add_links(struct snd_soc_card *card)
 {
 	struct meson_card *priv = snd_soc_card_get_drvdata(card);
 	struct device_node *node = card->dev->of_node;
 	struct device_node *np;
 	int num, i, ret;

 	num = of_get_child_count(node);
 	if (!num) {
 		dev_err(card->dev, "card has no links\n");
 		return -EINVAL;
 	}

 	ret = meson_card_reallocate_links(card, num);
 	if (ret)
 		return ret;

 	i = 0;
 	for_each_child_of_node(node, np) {
 		ret = priv->match_data->add_link(card, np, &i);
 		if (ret) {
 			of_node_put(np);
 			return ret;
 		}

 		i++;
 	}

 	return 0;
 }

 static int meson_card_parse_of_optional(struct snd_soc_card *card,
 					const char *propname,
 					int (*func)(struct snd_soc_card *c,
 						    const char *p))
 {
 	/* If property is not provided, don't fail ... */
 	if (!of_property_read_bool(card->dev->of_node, propname))
 		return 0;

 	/* ... but do fail if it is provided and the parsing fails */
 	return func(card, propname);
 }

 static void meson_card_clean_references(struct meson_card *priv)
 {
 	struct snd_soc_card *card = &priv->card;
 	struct snd_soc_dai_link *link;
 	struct snd_soc_dai_link_component *codec;
 	struct snd_soc_aux_dev *aux;
 	int i, j;

 	if (card->dai_link) {
 		for_each_card_prelinks(card, i, link) {
 			if (link->cpus)
 				of_node_put(link->cpus->of_node);
 			for_each_link_codecs(link, j, codec)
 				of_node_put(codec->of_node);
 		}
 	}

 	if (card->aux_dev) {
 		for_each_card_pre_auxs(card, i, aux)
 			of_node_put(aux->dlc.of_node);
 	}

 	kfree(card->dai_link);
 	kfree(priv->link_data);
 }

 int meson_card_probe(struct platform_device *pdev)
 {
 	const struct meson_card_match_data *data;
 	struct device *dev = &pdev->dev;
 	struct meson_card *priv;
 	int ret;

 	data = of_device_get_match_data(dev);
 	if (!data) {
 		dev_err(dev, "failed to match device\n");
 		return -ENODEV;
 	}

 	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
 	if (!priv)
 		return -ENOMEM;

 	platform_set_drvdata(pdev, priv);
 	snd_soc_card_set_drvdata(&priv->card, priv);

 	priv->card.owner = THIS_MODULE;
 	priv->card.dev = dev;
 	priv->card.driver_name = dev->driver->name;
 	priv->match_data = data;

 	ret = snd_soc_of_parse_card_name(&priv->card, "model");
 	if (ret < 0)
 		return ret;

 	ret = meson_card_parse_of_optional(&priv->card, "audio-routing",
 					   snd_soc_of_parse_audio_routing);
 	if (ret) {
 		dev_err(dev, "error while parsing routing\n");
 		return ret;
 	}

 	ret = meson_card_parse_of_optional(&priv->card, "audio-widgets",
 					   snd_soc_of_parse_audio_simple_widgets);
 	if (ret) {
 		dev_err(dev, "error while parsing widgets\n");
 		return ret;
 	}

 	ret = meson_card_add_links(&priv->card);
 	if (ret)
 		goto out_err;

 	ret = snd_soc_of_parse_aux_devs(&priv->card, "audio-aux-devs");
 	if (ret)
 		goto out_err;

 	ret = devm_snd_soc_register_card(dev, &priv->card);
 	if (ret)
 		goto out_err;

 	return 0;

 out_err:
 	meson_card_clean_references(priv);
 	return ret;
 }
 EXPORT_SYMBOL_GPL(meson_card_probe);

 int meson_card_remove(struct platform_device *pdev)
 {
 	struct meson_card *priv = platform_get_drvdata(pdev);

 	meson_card_clean_references(priv);

 	return 0;
 }
 EXPORT_SYMBOL_GPL(meson_card_remove);

 MODULE_DESCRIPTION("Amlogic Sound Card Utils");
 MODULE_AUTHOR("Jerome Brunet <jbrunet@baylibre.com>");
 MODULE_LICENSE("GPL v2");
	// SPDX-License-Identifier: GPL-2.0
	//
	// Copyright (c) 2020 BayLibre, SAS.
	// Author: Jerome Brunet <jbrunet@baylibre.com>

	#include <linux/module.h>
	#include <linux/of_platform.h>
	#include <sound/soc.h>

	#include "meson-card.h"

	int meson_card_i2s_set_sysclk(struct snd_pcm_substream *substream,
	struct snd_pcm_hw_params *params,
	unsigned int mclk_fs)
	{
	struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
	struct snd_soc_dai *codec_dai;
	unsigned int mclk;
	int ret, i;

	if (!mclk_fs)
	return 0;

	mclk = params_rate(params) * mclk_fs;

	for_each_rtd_codec_dais(rtd, i, codec_dai) {
	ret = snd_soc_dai_set_sysclk(codec_dai, 0, mclk,
	SND_SOC_CLOCK_IN);
	if (ret && ret != -ENOTSUPP)
	return ret;
	}

	ret = snd_soc_dai_set_sysclk(asoc_rtd_to_cpu(rtd, 0), 0, mclk,
	SND_SOC_CLOCK_OUT);
	if (ret && ret != -ENOTSUPP)
	return ret;

	return 0;
	}
	EXPORT_SYMBOL_GPL(meson_card_i2s_set_sysclk);

	int meson_card_reallocate_links(struct snd_soc_card *card,
	unsigned int num_links)
	{
	struct meson_card *priv = snd_soc_card_get_drvdata(card);
	struct snd_soc_dai_link *links;
	void **ldata;

	links = krealloc(priv->card.dai_link,
	num_links * sizeof(*priv->card.dai_link),
	GFP_KERNEL \| __GFP_ZERO);
	if (!links)
	goto err_links;

	ldata = krealloc(priv->link_data,
	num_links * sizeof(*priv->link_data),
	GFP_KERNEL \| __GFP_ZERO);
	if (!ldata)
	goto err_ldata;

	priv->card.dai_link = links;
	priv->link_data = ldata;
	priv->card.num_links = num_links;
	return 0;

	err_ldata:
	kfree(links);
	err_links:
	dev_err(priv->card.dev, "failed to allocate links\n");
	return -ENOMEM;

	}
	EXPORT_SYMBOL_GPL(meson_card_reallocate_links);

	int meson_card_parse_dai(struct snd_soc_card *card,
	struct device_node *node,
	struct device_node **dai_of_node,
	const char **dai_name)
	{
	struct of_phandle_args args;
	int ret;

	if (!dai_name \|\| !dai_of_node \|\| !node)
	return -EINVAL;

	ret = of_parse_phandle_with_args(node, "sound-dai",
	"#sound-dai-cells", 0, &args);
	if (ret)
	return dev_err_probe(card->dev, ret, "can't parse dai\n");

	*dai_of_node = args.np;

	return snd_soc_get_dai_name(&args, dai_name);
	}
	EXPORT_SYMBOL_GPL(meson_card_parse_dai);

	static int meson_card_set_link_name(struct snd_soc_card *card,
	struct snd_soc_dai_link *link,
	struct device_node *node,
	const char *prefix)
	{
	char *name = devm_kasprintf(card->dev, GFP_KERNEL, "%s.%s",
	prefix, node->full_name);
	if (!name)
	return -ENOMEM;

	link->name = name;
	link->stream_name = name;

	return 0;
	}

	unsigned int meson_card_parse_daifmt(struct device_node *node,
	struct device_node *cpu_node)
	{
	struct device_node *bitclkmaster = NULL;
	struct device_node *framemaster = NULL;
	unsigned int daifmt;

	daifmt = snd_soc_daifmt_parse_format(node, NULL);

	snd_soc_daifmt_parse_clock_provider_as_phandle(node, NULL, &bitclkmaster, &framemaster);

	/* If no master is provided, default to cpu master */
	if (!bitclkmaster \|\| bitclkmaster == cpu_node) {
	daifmt \|= (!framemaster \|\| framemaster == cpu_node) ?
	SND_SOC_DAIFMT_CBS_CFS : SND_SOC_DAIFMT_CBS_CFM;
	} else {
	daifmt \|= (!framemaster \|\| framemaster == cpu_node) ?
	SND_SOC_DAIFMT_CBM_CFS : SND_SOC_DAIFMT_CBM_CFM;
	}

	of_node_put(bitclkmaster);
	of_node_put(framemaster);

	return daifmt;
	}
	EXPORT_SYMBOL_GPL(meson_card_parse_daifmt);

	int meson_card_set_be_link(struct snd_soc_card *card,
	struct snd_soc_dai_link *link,
	struct device_node *node)
	{
	struct snd_soc_dai_link_component *codec;
	struct device_node *np;
	int ret, num_codecs;

	num_codecs = of_get_child_count(node);
	if (!num_codecs) {
	dev_err(card->dev, "be link %s has no codec\n",
	node->full_name);
	return -EINVAL;
	}

	codec = devm_kcalloc(card->dev, num_codecs, sizeof(*codec), GFP_KERNEL);
	if (!codec)
	return -ENOMEM;

	link->codecs = codec;
	link->num_codecs = num_codecs;

	for_each_child_of_node(node, np) {
	ret = meson_card_parse_dai(card, np, &codec->of_node,
	&codec->dai_name);
	if (ret) {
	of_node_put(np);
	return ret;
	}

	codec++;
	}

	ret = meson_card_set_link_name(card, link, node, "be");
	if (ret)
	dev_err(card->dev, "error setting %pOFn link name\n", np);

	return ret;
	}
	EXPORT_SYMBOL_GPL(meson_card_set_be_link);

	int meson_card_set_fe_link(struct snd_soc_card *card,
	struct snd_soc_dai_link *link,
	struct device_node *node,
	bool is_playback)
	{
	struct snd_soc_dai_link_component *codec;

	codec = devm_kzalloc(card->dev, sizeof(*codec), GFP_KERNEL);
	if (!codec)
	return -ENOMEM;

	link->codecs = codec;
	link->num_codecs = 1;

	link->dynamic = 1;
	link->dpcm_merged_format = 1;
	link->dpcm_merged_chan = 1;
	link->dpcm_merged_rate = 1;
	link->codecs->dai_name = "snd-soc-dummy-dai";
	link->codecs->name = "snd-soc-dummy";

	if (is_playback)
	link->dpcm_playback = 1;
	else
	link->dpcm_capture = 1;

	return meson_card_set_link_name(card, link, node, "fe");
	}
	EXPORT_SYMBOL_GPL(meson_card_set_fe_link);

	static int meson_card_add_links(struct snd_soc_card *card)
	{
	struct meson_card *priv = snd_soc_card_get_drvdata(card);
	struct device_node *node = card->dev->of_node;
	struct device_node *np;
	int num, i, ret;

	num = of_get_child_count(node);
	if (!num) {
	dev_err(card->dev, "card has no links\n");
	return -EINVAL;
	}

	ret = meson_card_reallocate_links(card, num);
	if (ret)
	return ret;

	i = 0;
	for_each_child_of_node(node, np) {
	ret = priv->match_data->add_link(card, np, &i);
	if (ret) {
	of_node_put(np);
	return ret;
	}

	i++;
	}

	return 0;
	}

	static int meson_card_parse_of_optional(struct snd_soc_card *card,
	const char *propname,
	int (func)(struct snd_soc_card c,
	const char *p))
	{
	/* If property is not provided, don't fail ... */
	if (!of_property_read_bool(card->dev->of_node, propname))
	return 0;

	/* ... but do fail if it is provided and the parsing fails */
	return func(card, propname);
	}

	static void meson_card_clean_references(struct meson_card *priv)
	{
	struct snd_soc_card *card = &priv->card;
	struct snd_soc_dai_link *link;
	struct snd_soc_dai_link_component *codec;
	struct snd_soc_aux_dev *aux;
	int i, j;

	if (card->dai_link) {
	for_each_card_prelinks(card, i, link) {
	if (link->cpus)
	of_node_put(link->cpus->of_node);
	for_each_link_codecs(link, j, codec)
	of_node_put(codec->of_node);
	}
	}

	if (card->aux_dev) {
	for_each_card_pre_auxs(card, i, aux)
	of_node_put(aux->dlc.of_node);
	}

	kfree(card->dai_link);
	kfree(priv->link_data);
	}

	int meson_card_probe(struct platform_device *pdev)
	{
	const struct meson_card_match_data *data;
	struct device *dev = &pdev->dev;
	struct meson_card *priv;
	int ret;

	data = of_device_get_match_data(dev);
	if (!data) {
	dev_err(dev, "failed to match device\n");
	return -ENODEV;
	}

	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
	if (!priv)
	return -ENOMEM;

	platform_set_drvdata(pdev, priv);
	snd_soc_card_set_drvdata(&priv->card, priv);

	priv->card.owner = THIS_MODULE;
	priv->card.dev = dev;
	priv->card.driver_name = dev->driver->name;
	priv->match_data = data;

	ret = snd_soc_of_parse_card_name(&priv->card, "model");
	if (ret < 0)
	return ret;

	ret = meson_card_parse_of_optional(&priv->card, "audio-routing",
	snd_soc_of_parse_audio_routing);
	if (ret) {
	dev_err(dev, "error while parsing routing\n");
	return ret;
	}

	ret = meson_card_parse_of_optional(&priv->card, "audio-widgets",
	snd_soc_of_parse_audio_simple_widgets);
	if (ret) {
	dev_err(dev, "error while parsing widgets\n");
	return ret;
	}

	ret = meson_card_add_links(&priv->card);
	if (ret)
	goto out_err;

	ret = snd_soc_of_parse_aux_devs(&priv->card, "audio-aux-devs");
	if (ret)
	goto out_err;

	ret = devm_snd_soc_register_card(dev, &priv->card);
	if (ret)
	goto out_err;

	return 0;

	out_err:
	meson_card_clean_references(priv);
	return ret;
	}
	EXPORT_SYMBOL_GPL(meson_card_probe);

	int meson_card_remove(struct platform_device *pdev)
	{
	struct meson_card *priv = platform_get_drvdata(pdev);

	meson_card_clean_references(priv);

	return 0;
	}
	EXPORT_SYMBOL_GPL(meson_card_remove);

	MODULE_DESCRIPTION("Amlogic Sound Card Utils");
	MODULE_AUTHOR("Jerome Brunet <jbrunet@baylibre.com>");
	MODULE_LICENSE("GPL v2");