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- // 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) {
- if (ret != -EPROBE_DEFER)
- dev_err(card->dev, "can't parse dai %d\n", ret);
- return ret;
- }
- *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_of_parse_daifmt(node, "",
- &bitclkmaster, &framemaster);
- daifmt &= ~SND_SOC_DAIFMT_MASTER_MASK;
- /* 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->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");
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