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OpenCloudOS-Kernel/sound/soc/generic/audio-graph-scu-card.c

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// SPDX-License-Identifier: GPL-2.0
//
// ASoC audio graph SCU sound card support
//
// Copyright (C) 2017 Renesas Solutions Corp.
// Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
//
// based on
// ${LINUX}/sound/soc/generic/simple-scu-card.c
// ${LINUX}/sound/soc/generic/audio-graph-card.c
#include <linux/clk.h>
#include <linux/device.h>
#include <linux/gpio.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/jack.h>
#include <sound/simple_card_utils.h>
struct graph_card_data {
struct snd_soc_card snd_card;
struct snd_soc_codec_conf codec_conf;
struct asoc_simple_dai *dai_props;
struct snd_soc_dai_link *dai_link;
struct asoc_simple_card_data adata;
};
#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 asoc_simple_dai *dai_props = graph_priv_to_props(priv, rtd->num);
return asoc_simple_card_clk_enable(dai_props);
}
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 asoc_simple_dai *dai_props = graph_priv_to_props(priv, rtd->num);
asoc_simple_card_clk_disable(dai_props);
}
static const struct snd_soc_ops asoc_graph_card_ops = {
.startup = asoc_graph_card_startup,
.shutdown = asoc_graph_card_shutdown,
};
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 *dai;
struct snd_soc_dai_link *dai_link;
struct asoc_simple_dai *dai_props;
int num = rtd->num;
dai_link = graph_priv_to_link(priv, num);
dai_props = graph_priv_to_props(priv, num);
dai = dai_link->dynamic ?
rtd->cpu_dai :
rtd->codec_dai;
return asoc_simple_card_init_dai(dai, dai_props);
}
static int asoc_graph_card_be_hw_params_fixup(struct snd_soc_pcm_runtime *rtd,
struct snd_pcm_hw_params *params)
{
struct graph_card_data *priv = snd_soc_card_get_drvdata(rtd->card);
asoc_simple_card_convert_fixup(&priv->adata, params);
return 0;
}
static int asoc_graph_card_dai_link_of(struct device_node *ep,
struct graph_card_data *priv,
unsigned int daifmt,
int idx, int is_fe)
{
struct device *dev = graph_priv_to_dev(priv);
struct snd_soc_dai_link *dai_link = graph_priv_to_link(priv, idx);
struct asoc_simple_dai *dai_props = graph_priv_to_props(priv, idx);
struct snd_soc_card *card = graph_priv_to_card(priv);
int ret;
if (is_fe) {
/* BE is dummy */
dai_link->codec_of_node = NULL;
dai_link->codec_dai_name = "snd-soc-dummy-dai";
dai_link->codec_name = "snd-soc-dummy";
/* FE settings */
dai_link->dynamic = 1;
dai_link->dpcm_merged_format = 1;
ret = asoc_simple_card_parse_graph_cpu(ep, dai_link);
if (ret)
return ret;
ret = asoc_simple_card_parse_clk_cpu(dev, ep, dai_link, dai_props);
if (ret < 0)
return ret;
ret = asoc_simple_card_set_dailink_name(dev, dai_link,
"fe.%s",
dai_link->cpu_dai_name);
if (ret < 0)
return ret;
/* card->num_links includes Codec */
asoc_simple_card_canonicalize_cpu(dai_link,
of_graph_get_endpoint_count(dai_link->cpu_of_node) == 1);
} else {
/* FE is dummy */
dai_link->cpu_of_node = NULL;
dai_link->cpu_dai_name = "snd-soc-dummy-dai";
dai_link->cpu_name = "snd-soc-dummy";
/* BE settings */
dai_link->no_pcm = 1;
dai_link->be_hw_params_fixup = asoc_graph_card_be_hw_params_fixup;
ret = asoc_simple_card_parse_graph_codec(ep, dai_link);
if (ret < 0)
return ret;
ret = asoc_simple_card_parse_clk_codec(dev, ep, dai_link, dai_props);
if (ret < 0)
return ret;
ret = asoc_simple_card_set_dailink_name(dev, dai_link,
"be.%s",
dai_link->codec_dai_name);
if (ret < 0)
return ret;
snd_soc_of_parse_audio_prefix(card,
&priv->codec_conf,
dai_link->codec_of_node,
"prefix");
}
ret = asoc_simple_card_of_parse_tdm(ep, dai_props);
if (ret)
return ret;
ret = asoc_simple_card_canonicalize_dailink(dai_link);
if (ret < 0)
return ret;
dai_link->dai_fmt = daifmt;
dai_link->dpcm_playback = 1;
dai_link->dpcm_capture = 1;
dai_link->ops = &asoc_graph_card_ops;
dai_link->init = asoc_graph_card_dai_init;
return 0;
}
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;
struct device_node *cpu_port;
struct device_node *cpu_ep;
struct device_node *codec_ep;
struct device_node *rcpu_ep;
struct device_node *codec_port;
struct device_node *codec_port_old;
unsigned int daifmt = 0;
int dai_idx, ret;
int rc, codec;
if (!node)
return -EINVAL;
/*
* we need to consider "widgets", "mclk-fs" around here
* see simple-card
*/
ret = asoc_simple_card_of_parse_routing(card, NULL, 0);
if (ret < 0)
return ret;
asoc_simple_card_parse_convert(dev, NULL, &priv->adata);
/*
* it supports multi CPU, single CODEC only here
* see asoc_graph_get_dais_count
*/
/* find 1st codec */
of_for_each_phandle(&it, rc, node, "dais", NULL, 0) {
cpu_port = it.node;
cpu_ep = of_get_next_child(cpu_port, NULL);
codec_ep = of_graph_get_remote_endpoint(cpu_ep);
rcpu_ep = of_graph_get_remote_endpoint(codec_ep);
of_node_put(cpu_ep);
of_node_put(codec_ep);
of_node_put(rcpu_ep);
if (!codec_ep)
continue;
if (rcpu_ep != cpu_ep) {
dev_err(dev, "remote-endpoint missmatch (%s/%s/%s)\n",
cpu_ep->name, codec_ep->name, rcpu_ep->name);
ret = -EINVAL;
goto parse_of_err;
}
ret = asoc_simple_card_parse_daifmt(dev, cpu_ep, codec_ep,
NULL, &daifmt);
if (ret < 0) {
of_node_put(cpu_port);
goto parse_of_err;
}
}
dai_idx = 0;
codec_port_old = NULL;
for (codec = 0; codec < 2; codec++) {
/*
* To listup valid sounds continuously,
* detect all CPU-dummy first, and
* detect all dummy-Codec second
*/
of_for_each_phandle(&it, rc, node, "dais", NULL, 0) {
cpu_port = it.node;
cpu_ep = of_get_next_child(cpu_port, NULL);
codec_ep = of_graph_get_remote_endpoint(cpu_ep);
codec_port = of_graph_get_port_parent(codec_ep);
of_node_put(cpu_ep);
of_node_put(codec_ep);
of_node_put(codec_port);
if (codec) {
if (!codec_port)
continue;
if (codec_port_old == codec_port)
continue;
codec_port_old = codec_port;
/* Back-End (= Codec) */
ret = asoc_graph_card_dai_link_of(codec_ep, priv, daifmt, dai_idx++, 0);
if (ret < 0) {
of_node_put(cpu_port);
goto parse_of_err;
}
} else {
/* Front-End (= CPU) */
ret = asoc_graph_card_dai_link_of(cpu_ep, priv, daifmt, dai_idx++, 1);
if (ret < 0) {
of_node_put(cpu_port);
goto parse_of_err;
}
}
}
}
ret = asoc_simple_card_parse_card_name(card, NULL);
if (ret)
goto parse_of_err;
ret = 0;
parse_of_err:
return ret;
}
static int asoc_graph_get_dais_count(struct device *dev)
{
struct of_phandle_iterator it;
struct device_node *node = dev->of_node;
struct device_node *cpu_port;
struct device_node *cpu_ep;
struct device_node *codec_ep;
struct device_node *codec_port;
struct device_node *codec_port_old;
int count = 0;
int rc;
codec_port_old = NULL;
of_for_each_phandle(&it, rc, node, "dais", NULL, 0) {
cpu_port = it.node;
cpu_ep = of_get_next_child(cpu_port, NULL);
codec_ep = of_graph_get_remote_endpoint(cpu_ep);
codec_port = of_graph_get_port_parent(codec_ep);
of_node_put(cpu_ep);
of_node_put(codec_ep);
of_node_put(codec_port);
if (cpu_ep)
count++;
if (!codec_port)
continue;
if (codec_port_old == codec_port)
continue;
count++;
codec_port_old = codec_port;
}
return count;
}
static int asoc_graph_card_probe(struct platform_device *pdev)
{
struct graph_card_data *priv;
struct snd_soc_dai_link *dai_link;
struct asoc_simple_dai *dai_props;
struct device *dev = &pdev->dev;
struct snd_soc_card *card;
int num, ret;
/* 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;
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 = priv->dai_link;
card->num_links = num;
card->codec_conf = &priv->codec_conf;
card->num_configs = 1;
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-scu-card", },
{},
};
MODULE_DEVICE_TABLE(of, asoc_graph_of_match);
static struct platform_driver asoc_graph_card = {
.driver = {
.name = "asoc-audio-graph-scu-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-scu-card");
MODULE_LICENSE("GPL v2");
MODULE_DESCRIPTION("ASoC Audio Graph SCU Sound Card");
MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");
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