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// SPDX-License-Identifier: GPL-2.0
//
// ASoC simple sound card support
//
// Copyright (C) 2012 Renesas Solutions Corp.
// Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
#include <linux/clk.h>
#include <linux/device.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/string.h>
#include <sound/simple_card.h>
#include <sound/soc-dai.h>
#include <sound/soc.h>
struct simple_card_data {
struct snd_soc_card snd_card;
struct simple_dai_props {
struct asoc_simple_dai cpu_dai;
struct asoc_simple_dai codec_dai;
struct snd_soc_dai_link_component codecs; /* single codec */
struct snd_soc_dai_link_component platform;
unsigned int mclk_fs;
} *dai_props;
unsigned int mclk_fs;
struct asoc_simple_jack hp_jack;
struct asoc_simple_jack mic_jack;
struct snd_soc_dai_link *dai_link;
};
#define simple_priv_to_card(priv) (&(priv)->snd_card)
#define simple_priv_to_props(priv, i) ((priv)->dai_props + (i))
#define simple_priv_to_dev(priv) (simple_priv_to_card(priv)->dev)
#define simple_priv_to_link(priv, i) (simple_priv_to_card(priv)->dai_link + (i))
#define DAI "sound-dai"
#define CELL "#sound-dai-cells"
#define PREFIX "simple-audio-card,"
static int asoc_simple_card_startup(struct snd_pcm_substream *substream)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct simple_card_data *priv = snd_soc_card_get_drvdata(rtd->card);
struct simple_dai_props *dai_props =
simple_priv_to_props(priv, rtd->num);
int ret;
ret = asoc_simple_card_clk_enable(&dai_props->cpu_dai);
if (ret)
return ret;
ret = asoc_simple_card_clk_enable(&dai_props->codec_dai);
if (ret)
asoc_simple_card_clk_disable(&dai_props->cpu_dai);
return ret;
}
static void asoc_simple_card_shutdown(struct snd_pcm_substream *substream)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct simple_card_data *priv = snd_soc_card_get_drvdata(rtd->card);
struct simple_dai_props *dai_props =
simple_priv_to_props(priv, rtd->num);
asoc_simple_card_clk_disable(&dai_props->cpu_dai);
asoc_simple_card_clk_disable(&dai_props->codec_dai);
}
static int asoc_simple_set_clk_rate(struct asoc_simple_dai *simple_dai,
unsigned long rate)
{
if (!simple_dai->clk)
return 0;
if (clk_get_rate(simple_dai->clk) == rate)
return 0;
return clk_set_rate(simple_dai->clk, rate);
}
static int asoc_simple_card_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_soc_dai *codec_dai = rtd->codec_dai;
struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
struct simple_card_data *priv = snd_soc_card_get_drvdata(rtd->card);
struct simple_dai_props *dai_props =
simple_priv_to_props(priv, rtd->num);
unsigned int mclk, mclk_fs = 0;
int ret = 0;
if (priv->mclk_fs)
mclk_fs = priv->mclk_fs;
else if (dai_props->mclk_fs)
mclk_fs = dai_props->mclk_fs;
if (mclk_fs) {
mclk = params_rate(params) * mclk_fs;
ret = asoc_simple_set_clk_rate(&dai_props->codec_dai, mclk);
if (ret < 0)
return ret;
ret = asoc_simple_set_clk_rate(&dai_props->cpu_dai, mclk);
if (ret < 0)
return ret;
ret = snd_soc_dai_set_sysclk(codec_dai, 0, mclk,
SND_SOC_CLOCK_IN);
if (ret && ret != -ENOTSUPP)
goto err;
ret = snd_soc_dai_set_sysclk(cpu_dai, 0, mclk,
SND_SOC_CLOCK_OUT);
if (ret && ret != -ENOTSUPP)
goto err;
}
return 0;
err:
return ret;
}
static const struct snd_soc_ops asoc_simple_card_ops = {
.startup = asoc_simple_card_startup,
.shutdown = asoc_simple_card_shutdown,
.hw_params = asoc_simple_card_hw_params,
};
static int asoc_simple_card_dai_init(struct snd_soc_pcm_runtime *rtd)
{
struct simple_card_data *priv = snd_soc_card_get_drvdata(rtd->card);
struct snd_soc_dai *codec = rtd->codec_dai;
struct snd_soc_dai *cpu = rtd->cpu_dai;
struct simple_dai_props *dai_props =
simple_priv_to_props(priv, rtd->num);
int ret;
ret = asoc_simple_card_init_dai(codec, &dai_props->codec_dai);
if (ret < 0)
return ret;
ret = asoc_simple_card_init_dai(cpu, &dai_props->cpu_dai);
if (ret < 0)
return ret;
return 0;
}
static int asoc_simple_card_dai_link_of(struct device_node *node,
struct simple_card_data *priv,
int idx,
bool is_top_level_node)
{
struct device *dev = simple_priv_to_dev(priv);
struct snd_soc_dai_link *dai_link = simple_priv_to_link(priv, idx);
struct simple_dai_props *dai_props = simple_priv_to_props(priv, idx);
struct asoc_simple_dai *cpu_dai = &dai_props->cpu_dai;
struct asoc_simple_dai *codec_dai = &dai_props->codec_dai;
struct device_node *cpu = NULL;
struct device_node *plat = NULL;
struct device_node *codec = NULL;
char prop[128];
char *prefix = "";
int ret, single_cpu;
/* For single DAI link & old style of DT node */
if (is_top_level_node)
prefix = PREFIX;
snprintf(prop, sizeof(prop), "%scpu", prefix);
cpu = of_get_child_by_name(node, prop);
if (!cpu) {
ret = -EINVAL;
dev_err(dev, "%s: Can't find %s DT node\n", __func__, prop);
goto dai_link_of_err;
}
snprintf(prop, sizeof(prop), "%splat", prefix);
plat = of_get_child_by_name(node, prop);
snprintf(prop, sizeof(prop), "%scodec", prefix);
codec = of_get_child_by_name(node, prop);
if (!codec) {
ret = -EINVAL;
dev_err(dev, "%s: Can't find %s DT node\n", __func__, prop);
goto dai_link_of_err;
}
ret = asoc_simple_card_parse_daifmt(dev, node, codec,
prefix, &dai_link->dai_fmt);
if (ret < 0)
goto dai_link_of_err;
of_property_read_u32(node, "mclk-fs", &dai_props->mclk_fs);
ret = asoc_simple_card_parse_cpu(cpu, dai_link,
DAI, CELL, &single_cpu);
if (ret < 0)
goto dai_link_of_err;
ret = asoc_simple_card_parse_codec(codec, dai_link, DAI, CELL);
if (ret < 0)
goto dai_link_of_err;
ret = asoc_simple_card_parse_platform(plat, dai_link, DAI, CELL);
if (ret < 0)
goto dai_link_of_err;
ret = asoc_simple_card_of_parse_tdm(cpu, cpu_dai);
if (ret < 0)
goto dai_link_of_err;
ret = asoc_simple_card_of_parse_tdm(codec, codec_dai);
if (ret < 0)
goto dai_link_of_err;
ret = asoc_simple_card_parse_clk_cpu(dev, cpu, dai_link, cpu_dai);
if (ret < 0)
goto dai_link_of_err;
ret = asoc_simple_card_parse_clk_codec(dev, codec, dai_link, codec_dai);
if (ret < 0)
goto dai_link_of_err;
ret = asoc_simple_card_canonicalize_dailink(dai_link);
if (ret < 0)
goto dai_link_of_err;
ret = asoc_simple_card_set_dailink_name(dev, dai_link,
"%s-%s",
dai_link->cpu_dai_name,
dai_link->codecs->dai_name);
if (ret < 0)
goto dai_link_of_err;
dai_link->ops = &asoc_simple_card_ops;
dai_link->init = asoc_simple_card_dai_init;
asoc_simple_card_canonicalize_cpu(dai_link, single_cpu);
dai_link_of_err:
of_node_put(cpu);
of_node_put(codec);
return ret;
}
static int asoc_simple_card_parse_aux_devs(struct device_node *node,
struct simple_card_data *priv)
{
struct device *dev = simple_priv_to_dev(priv);
struct device_node *aux_node;
struct snd_soc_card *card = simple_priv_to_card(priv);
int i, n, len;
if (!of_find_property(node, PREFIX "aux-devs", &len))
return 0; /* Ok to have no aux-devs */
n = len / sizeof(__be32);
if (n <= 0)
return -EINVAL;
card->aux_dev = devm_kcalloc(dev,
n, sizeof(*card->aux_dev), GFP_KERNEL);
if (!card->aux_dev)
return -ENOMEM;
for (i = 0; i < n; i++) {
aux_node = of_parse_phandle(node, PREFIX "aux-devs", i);
if (!aux_node)
return -EINVAL;
card->aux_dev[i].codec_of_node = aux_node;
}
card->num_aux_devs = n;
return 0;
}
static int asoc_simple_card_parse_of(struct simple_card_data *priv)
{
struct device *dev = simple_priv_to_dev(priv);
struct snd_soc_card *card = simple_priv_to_card(priv);
struct device_node *dai_link;
struct device_node *node = dev->of_node;
int ret;
if (!node)
return -EINVAL;
dai_link = of_get_child_by_name(node, PREFIX "dai-link");
ret = asoc_simple_card_of_parse_widgets(card, PREFIX);
if (ret < 0)
goto card_parse_end;
ret = asoc_simple_card_of_parse_routing(card, PREFIX, 1);
if (ret < 0)
goto card_parse_end;
/* Factor to mclk, used in hw_params() */
of_property_read_u32(node, PREFIX "mclk-fs", &priv->mclk_fs);
/* Single/Muti DAI link(s) & New style of DT node */
if (dai_link) {
struct device_node *np = NULL;
int i = 0;
for_each_child_of_node(node, np) {
dev_dbg(dev, "\tlink %d:\n", i);
ret = asoc_simple_card_dai_link_of(np, priv,
i, false);
if (ret < 0) {
of_node_put(np);
goto card_parse_end;
}
i++;
}
} else {
/* For single DAI link & old style of DT node */
ret = asoc_simple_card_dai_link_of(node, priv, 0, true);
if (ret < 0)
goto card_parse_end;
}
ret = asoc_simple_card_parse_card_name(card, PREFIX);
if (ret < 0)
goto card_parse_end;
ret = asoc_simple_card_parse_aux_devs(node, priv);
card_parse_end:
of_node_put(dai_link);
return ret;
}
static int asoc_simple_soc_card_probe(struct snd_soc_card *card)
{
struct simple_card_data *priv = snd_soc_card_get_drvdata(card);
int ret;
ret = asoc_simple_card_init_hp(card, &priv->hp_jack, PREFIX);
if (ret < 0)
return ret;
ret = asoc_simple_card_init_mic(card, &priv->mic_jack, PREFIX);
if (ret < 0)
return ret;
return 0;
}
static int asoc_simple_card_probe(struct platform_device *pdev)
{
struct simple_card_data *priv;
struct snd_soc_dai_link *dai_link;
struct simple_dai_props *dai_props;
struct device *dev = &pdev->dev;
struct device_node *np = dev->of_node;
struct snd_soc_card *card;
int num, ret, i;
/* Get the number of DAI links */
if (np && of_get_child_by_name(np, PREFIX "dai-link"))
num = of_get_child_count(np);
else
num = 1;
/* Allocate the private data and the DAI link array */
priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
if (!priv)
return -ENOMEM;
dai_props = devm_kcalloc(dev, num, sizeof(*dai_props), GFP_KERNEL);
dai_link = devm_kcalloc(dev, num, sizeof(*dai_link), GFP_KERNEL);
if (!dai_props || !dai_link)
return -ENOMEM;
/*
* Use snd_soc_dai_link_component instead of legacy style
* It is codec only. but cpu/platform will be supported in the future.
* see
* soc-core.c :: snd_soc_init_multicodec()
*/
for (i = 0; i < num; i++) {
dai_link[i].codecs = &dai_props[i].codecs;
dai_link[i].num_codecs = 1;
dai_link[i].platform = &dai_props[i].platform;
}
priv->dai_props = dai_props;
priv->dai_link = dai_link;
/* Init snd_soc_card */
card = simple_priv_to_card(priv);
card->owner = THIS_MODULE;
card->dev = dev;
card->dai_link = priv->dai_link;
card->num_links = num;
card->probe = asoc_simple_soc_card_probe;
if (np && of_device_is_available(np)) {
ret = asoc_simple_card_parse_of(priv);
if (ret < 0) {
if (ret != -EPROBE_DEFER)
dev_err(dev, "parse error %d\n", ret);
goto err;
}
} else {
struct asoc_simple_card_info *cinfo;
struct snd_soc_dai_link_component *codecs;
struct snd_soc_dai_link_component *platform;
cinfo = dev->platform_data;
if (!cinfo) {
dev_err(dev, "no info for asoc-simple-card\n");
return -EINVAL;
}
if (!cinfo->name ||
!cinfo->codec_dai.name ||
!cinfo->codec ||
!cinfo->platform ||
!cinfo->cpu_dai.name) {
dev_err(dev, "insufficient asoc_simple_card_info settings\n");
return -EINVAL;
}
codecs = dai_link->codecs;
codecs->name = cinfo->codec;
codecs->dai_name = cinfo->codec_dai.name;
platform = dai_link->platform;
platform->name = cinfo->platform;
card->name = (cinfo->card) ? cinfo->card : cinfo->name;
dai_link->name = cinfo->name;
dai_link->stream_name = cinfo->name;
dai_link->cpu_dai_name = cinfo->cpu_dai.name;
dai_link->dai_fmt = cinfo->daifmt;
dai_link->init = asoc_simple_card_dai_init;
memcpy(&priv->dai_props->cpu_dai, &cinfo->cpu_dai,
sizeof(priv->dai_props->cpu_dai));
memcpy(&priv->dai_props->codec_dai, &cinfo->codec_dai,
sizeof(priv->dai_props->codec_dai));
}
snd_soc_card_set_drvdata(card, priv);
ret = devm_snd_soc_register_card(dev, card);
if (ret < 0)
goto err;
return 0;
err:
asoc_simple_card_clean_reference(card);
return ret;
}
static int asoc_simple_card_remove(struct platform_device *pdev)
{
struct snd_soc_card *card = platform_get_drvdata(pdev);
return asoc_simple_card_clean_reference(card);
}
static const struct of_device_id asoc_simple_of_match[] = {
{ .compatible = "simple-audio-card", },
{},
};
MODULE_DEVICE_TABLE(of, asoc_simple_of_match);
static struct platform_driver asoc_simple_card = {
.driver = {
.name = "asoc-simple-card",
.pm = &snd_soc_pm_ops,
.of_match_table = asoc_simple_of_match,
},
.probe = asoc_simple_card_probe,
.remove = asoc_simple_card_remove,
};
module_platform_driver(asoc_simple_card);
MODULE_ALIAS("platform:asoc-simple-card");
MODULE_LICENSE("GPL v2");
MODULE_DESCRIPTION("ASoC Simple Sound Card");
MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");