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// SPDX-License-Identifier: GPL-2.0
//
// ASoC audio graph sound card support
//
// Copyright (C) 2016 Renesas Solutions Corp.
// Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
//
// based on ${LINUX}/sound/soc/generic/simple-card.c
#include <linux/clk.h>
#include <linux/device.h>
#include <linux/gpio.h>
#include <linux/gpio/consumer.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/of_gpio.h>
#include <linux/of_graph.h>
#include <linux/platform_device.h>
#include <linux/string.h>
#include <sound/simple_card_utils.h>
struct graph_card_data {
struct snd_soc_card snd_card;
struct graph_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;
struct gpio_desc *pa_gpio;
};
static int asoc_graph_card_outdrv_event(struct snd_soc_dapm_widget *w,
struct snd_kcontrol *kcontrol,
int event)
{
struct snd_soc_dapm_context *dapm = w->dapm;
struct graph_card_data *priv = snd_soc_card_get_drvdata(dapm->card);
switch (event) {
case SND_SOC_DAPM_POST_PMU:
gpiod_set_value_cansleep(priv->pa_gpio, 1);
break;
case SND_SOC_DAPM_PRE_PMD:
gpiod_set_value_cansleep(priv->pa_gpio, 0);
break;
default:
return -EINVAL;
}
return 0;
}
static const struct snd_soc_dapm_widget asoc_graph_card_dapm_widgets[] = {
SND_SOC_DAPM_OUT_DRV_E("Amplifier", SND_SOC_NOPM,
0, 0, NULL, 0, asoc_graph_card_outdrv_event,
SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD),
};
#define graph_priv_to_card(priv) (&(priv)->snd_card)
#define graph_priv_to_props(priv, i) ((priv)->dai_props + (i))
#define graph_priv_to_dev(priv) (graph_priv_to_card(priv)->dev)
#define graph_priv_to_link(priv, i) (graph_priv_to_card(priv)->dai_link + (i))
static int asoc_graph_card_startup(struct snd_pcm_substream *substream)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct graph_card_data *priv = snd_soc_card_get_drvdata(rtd->card);
struct graph_dai_props *dai_props = graph_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_graph_card_shutdown(struct snd_pcm_substream *substream)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct graph_card_data *priv = snd_soc_card_get_drvdata(rtd->card);
struct graph_dai_props *dai_props = graph_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_graph_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 graph_card_data *priv = snd_soc_card_get_drvdata(rtd->card);
struct graph_dai_props *dai_props = graph_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 = 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_graph_card_ops = {
.startup = asoc_graph_card_startup,
.shutdown = asoc_graph_card_shutdown,
.hw_params = asoc_graph_card_hw_params,
};
static int asoc_graph_card_dai_init(struct snd_soc_pcm_runtime *rtd)
{
struct graph_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 graph_dai_props *dai_props =
graph_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_graph_card_dai_link_of(struct device_node *cpu_port,
struct graph_card_data *priv,
int idx)
{
struct device *dev = graph_priv_to_dev(priv);
struct snd_soc_dai_link *dai_link = graph_priv_to_link(priv, idx);
struct graph_dai_props *dai_props = graph_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_ep = of_get_next_child(cpu_port, NULL);
struct device_node *codec_ep = of_graph_get_remote_endpoint(cpu_ep);
struct device_node *rcpu_ep = of_graph_get_remote_endpoint(codec_ep);
int ret;
if (rcpu_ep != cpu_ep) {
dev_err(dev, "remote-endpoint mismatch (%s/%s/%s)\n",
cpu_ep->name, codec_ep->name, rcpu_ep->name);
ret = -EINVAL;
goto dai_link_of_err;
}
ret = asoc_simple_card_parse_daifmt(dev, cpu_ep, codec_ep,
NULL, &dai_link->dai_fmt);
if (ret < 0)
goto dai_link_of_err;
of_property_read_u32(cpu_ep, "mclk-fs", &dai_props->mclk_fs);
of_property_read_u32(codec_ep, "mclk-fs", &dai_props->mclk_fs);
ret = asoc_simple_card_parse_graph_cpu(cpu_ep, dai_link);
if (ret < 0)
goto dai_link_of_err;
ret = asoc_simple_card_parse_graph_codec(codec_ep, dai_link);
if (ret < 0)
goto dai_link_of_err;
ret = asoc_simple_card_of_parse_tdm(cpu_ep, cpu_dai);
if (ret < 0)
goto dai_link_of_err;
ret = asoc_simple_card_of_parse_tdm(codec_ep, codec_dai);
if (ret < 0)
goto dai_link_of_err;
ret = asoc_simple_card_parse_clk_cpu(dev, cpu_ep, dai_link, cpu_dai);
if (ret < 0)
goto dai_link_of_err;
ret = asoc_simple_card_parse_clk_codec(dev, codec_ep, 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_graph_card_ops;
dai_link->init = asoc_graph_card_dai_init;
asoc_simple_card_canonicalize_cpu(dai_link,
of_graph_get_endpoint_count(dai_link->cpu_of_node) == 1);
dai_link_of_err:
of_node_put(cpu_ep);
of_node_put(rcpu_ep);
of_node_put(codec_ep);
return ret;
}
static int asoc_graph_card_parse_of(struct graph_card_data *priv)
{
struct of_phandle_iterator it;
struct device *dev = graph_priv_to_dev(priv);
struct snd_soc_card *card = graph_priv_to_card(priv);
struct device_node *node = dev->of_node;
int rc, idx = 0;
int ret;
ret = asoc_simple_card_of_parse_widgets(card, NULL);
if (ret < 0)
return ret;
ret = asoc_simple_card_of_parse_routing(card, NULL, 1);
if (ret < 0)
return ret;
/* Factor to mclk, used in hw_params() */
of_property_read_u32(node, "mclk-fs", &priv->mclk_fs);
of_for_each_phandle(&it, rc, node, "dais", NULL, 0) {
ret = asoc_graph_card_dai_link_of(it.node, priv, idx++);
if (ret < 0) {
of_node_put(it.node);
return ret;
}
}
return asoc_simple_card_parse_card_name(card, NULL);
}
static int asoc_graph_get_dais_count(struct device *dev)
{
struct of_phandle_iterator it;
struct device_node *node = dev->of_node;
int count = 0;
int rc;
of_for_each_phandle(&it, rc, node, "dais", NULL, 0)
count++;
return count;
}
static int asoc_graph_soc_card_probe(struct snd_soc_card *card)
{
struct graph_card_data *priv = snd_soc_card_get_drvdata(card);
int ret;
ret = asoc_simple_card_init_hp(card, &priv->hp_jack, NULL);
if (ret < 0)
return ret;
ret = asoc_simple_card_init_mic(card, &priv->mic_jack, NULL);
if (ret < 0)
return ret;
return 0;
}
static int asoc_graph_card_probe(struct platform_device *pdev)
{
struct graph_card_data *priv;
struct snd_soc_dai_link *dai_link;
struct graph_dai_props *dai_props;
struct device *dev = &pdev->dev;
struct snd_soc_card *card;
int num, ret, i;
/* Allocate the private data and the DAI link array */
priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
if (!priv)
return -ENOMEM;
num = asoc_graph_get_dais_count(dev);
if (num == 0)
return -EINVAL;
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->pa_gpio = devm_gpiod_get_optional(dev, "pa", GPIOD_OUT_LOW);
if (IS_ERR(priv->pa_gpio)) {
ret = PTR_ERR(priv->pa_gpio);
dev_err(dev, "failed to get amplifier gpio: %d\n", ret);
return ret;
}
priv->dai_props = dai_props;
priv->dai_link = dai_link;
/* Init snd_soc_card */
card = graph_priv_to_card(priv);
card->owner = THIS_MODULE;
card->dev = dev;
card->dai_link = dai_link;
card->num_links = num;
card->dapm_widgets = asoc_graph_card_dapm_widgets;
card->num_dapm_widgets = ARRAY_SIZE(asoc_graph_card_dapm_widgets);
card->probe = asoc_graph_soc_card_probe;
ret = asoc_graph_card_parse_of(priv);
if (ret < 0) {
if (ret != -EPROBE_DEFER)
dev_err(dev, "parse error %d\n", ret);
goto err;
}
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_graph_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_graph_of_match[] = {
{ .compatible = "audio-graph-card", },
{},
};
MODULE_DEVICE_TABLE(of, asoc_graph_of_match);
static struct platform_driver asoc_graph_card = {
.driver = {
.name = "asoc-audio-graph-card",
.pm = &snd_soc_pm_ops,
.of_match_table = asoc_graph_of_match,
},
.probe = asoc_graph_card_probe,
.remove = asoc_graph_card_remove,
};
module_platform_driver(asoc_graph_card);
MODULE_ALIAS("platform:asoc-audio-graph-card");
MODULE_LICENSE("GPL v2");
MODULE_DESCRIPTION("ASoC Audio Graph Sound Card");
MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");