// SPDX-License-Identifier: GPL-2.0
//
// Copyright (c) 2020 BayLibre, SAS.
// Author: Jerome Brunet <[email protected]>
#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 = snd_soc_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(snd_soc_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 snd_soc_dai_link_component *dlc)
{
int ret;
if (!dlc || !node)
return -EINVAL;
ret = snd_soc_of_get_dlc(node, NULL, dlc, 0);
if (ret)
return dev_err_probe(card->dev, ret, "can't parse dai\n");
return ret;
}
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);
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)
{
link->codecs = &snd_soc_dummy_dlc;
link->num_codecs = 1;
link->dynamic = 1;
link->dpcm_merged_format = 1;
link->dpcm_merged_chan = 1;
link->dpcm_merged_rate = 1;
if (is_playback)
link->playback_only = 1;
else
link->capture_only = 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);
void meson_card_remove(struct platform_device *pdev)
{
struct meson_card *priv = platform_get_drvdata(pdev);
meson_card_clean_references(priv);
}
EXPORT_SYMBOL_GPL(meson_card_remove);
MODULE_DESCRIPTION("Amlogic Sound Card Utils");
MODULE_AUTHOR("Jerome Brunet <[email protected]>");
MODULE_LICENSE("GPL v2");
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