WSL2-Linux-Kernel/sound/soc/generic/simple-card.c

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7.2 KiB
C
Исходник Обычный вид История

/*
* ASoC simple sound card support
*
* Copyright (C) 2012 Renesas Solutions Corp.
* Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/clk.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/string.h>
#include <sound/simple_card.h>
struct simple_card_data {
struct snd_soc_card snd_card;
unsigned int daifmt;
struct asoc_simple_dai cpu_dai;
struct asoc_simple_dai codec_dai;
struct snd_soc_dai_link snd_link;
};
static int __asoc_simple_card_dai_init(struct snd_soc_dai *dai,
struct asoc_simple_dai *set,
unsigned int daifmt)
{
int ret = 0;
daifmt |= set->fmt;
if (daifmt)
ret = snd_soc_dai_set_fmt(dai, daifmt);
if (ret == -ENOTSUPP) {
dev_dbg(dai->dev, "ASoC: set_fmt is not supported\n");
ret = 0;
}
if (!ret && set->sysclk)
ret = snd_soc_dai_set_sysclk(dai, 0, set->sysclk, 0);
return ret;
}
static int asoc_simple_card_dai_init(struct snd_soc_pcm_runtime *rtd)
{
struct simple_card_data *info =
snd_soc_card_get_drvdata(rtd->card);
struct snd_soc_dai *codec = rtd->codec_dai;
struct snd_soc_dai *cpu = rtd->cpu_dai;
unsigned int daifmt = info->daifmt;
int ret;
ret = __asoc_simple_card_dai_init(codec, &info->codec_dai, daifmt);
if (ret < 0)
return ret;
ret = __asoc_simple_card_dai_init(cpu, &info->cpu_dai, daifmt);
if (ret < 0)
return ret;
return 0;
}
static int
asoc_simple_card_sub_parse_of(struct device_node *np,
struct asoc_simple_dai *dai,
const struct device_node **p_node,
const char **name)
{
struct device_node *node;
struct clk *clk;
int ret;
/*
* get node via "sound-dai = <&phandle port>"
* it will be used as xxx_of_node on soc_bind_dai_link()
*/
node = of_parse_phandle(np, "sound-dai", 0);
if (!node)
return -ENODEV;
*p_node = node;
/* get dai->name */
ret = snd_soc_of_get_dai_name(np, name);
if (ret < 0)
goto parse_error;
/*
* bitclock-inversion, frame-inversion
* bitclock-master, frame-master
* and specific "format" if it has
*/
dai->fmt = snd_soc_of_parse_daifmt(np, NULL);
/*
* dai->sysclk come from
* "clocks = <&xxx>" (if system has common clock)
* or "system-clock-frequency = <xxx>"
* or device's module clock.
*/
if (of_property_read_bool(np, "clocks")) {
clk = of_clk_get(np, 0);
if (IS_ERR(clk)) {
ret = PTR_ERR(clk);
goto parse_error;
}
dai->sysclk = clk_get_rate(clk);
} else if (of_property_read_bool(np, "system-clock-frequency")) {
of_property_read_u32(np,
"system-clock-frequency",
&dai->sysclk);
} else {
clk = of_clk_get(node, 0);
if (!IS_ERR(clk))
dai->sysclk = clk_get_rate(clk);
}
ret = 0;
parse_error:
of_node_put(node);
return ret;
}
static int asoc_simple_card_parse_of(struct device_node *node,
struct simple_card_data *info,
struct device *dev)
{
struct snd_soc_dai_link *dai_link = info->snd_card.dai_link;
struct device_node *np;
char *name;
int ret;
/* get CPU/CODEC common format via simple-audio-card,format */
info->daifmt = snd_soc_of_parse_daifmt(node, "simple-audio-card,") &
(SND_SOC_DAIFMT_FORMAT_MASK | SND_SOC_DAIFMT_INV_MASK);
/* DAPM routes */
if (of_property_read_bool(node, "simple-audio-card,routing")) {
ret = snd_soc_of_parse_audio_routing(&info->snd_card,
"simple-audio-card,routing");
if (ret)
return ret;
}
/* CPU sub-node */
ret = -EINVAL;
np = of_get_child_by_name(node, "simple-audio-card,cpu");
if (np)
ret = asoc_simple_card_sub_parse_of(np,
&info->cpu_dai,
&dai_link->cpu_of_node,
&dai_link->cpu_dai_name);
if (ret < 0)
return ret;
/* CODEC sub-node */
ret = -EINVAL;
np = of_get_child_by_name(node, "simple-audio-card,codec");
if (np)
ret = asoc_simple_card_sub_parse_of(np,
&info->codec_dai,
&dai_link->codec_of_node,
&dai_link->codec_dai_name);
if (ret < 0)
return ret;
if (!dai_link->cpu_dai_name || !dai_link->codec_dai_name)
return -EINVAL;
/* card name is created from CPU/CODEC dai name */
name = devm_kzalloc(dev,
strlen(dai_link->cpu_dai_name) +
strlen(dai_link->codec_dai_name) + 2,
GFP_KERNEL);
sprintf(name, "%s-%s", dai_link->cpu_dai_name,
dai_link->codec_dai_name);
info->snd_card.name = name;
dai_link->name = dai_link->stream_name = name;
/* simple-card assumes platform == cpu */
dai_link->platform_of_node = dai_link->cpu_of_node;
dev_dbg(dev, "card-name : %s\n", name);
dev_dbg(dev, "platform : %04x\n", info->daifmt);
dev_dbg(dev, "cpu : %s / %04x / %d\n",
dai_link->cpu_dai_name,
info->cpu_dai.fmt,
info->cpu_dai.sysclk);
dev_dbg(dev, "codec : %s / %04x / %d\n",
dai_link->codec_dai_name,
info->codec_dai.fmt,
info->codec_dai.sysclk);
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 device_node *np = pdev->dev.of_node;
struct device *dev = &pdev->dev;
int ret;
priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
if (!priv)
return -ENOMEM;
/*
* init snd_soc_card
*/
priv->snd_card.owner = THIS_MODULE;
priv->snd_card.dev = dev;
dai_link = &priv->snd_link;
priv->snd_card.dai_link = dai_link;
priv->snd_card.num_links = 1;
if (np && of_device_is_available(np)) {
ret = asoc_simple_card_parse_of(np, priv, dev);
if (ret < 0) {
if (ret != -EPROBE_DEFER)
dev_err(dev, "parse error %d\n", ret);
return ret;
}
} else {
struct asoc_simple_card_info *cinfo;
cinfo = dev->platform_data;
if (!cinfo) {
dev_err(dev, "no info for asoc-simple-card\n");
return -EINVAL;
}
if (!cinfo->name ||
!cinfo->card ||
!cinfo->codec_dai.name ||
!cinfo->codec ||
!cinfo->platform ||
!cinfo->cpu_dai.name) {
dev_err(dev, "insufficient asoc_simple_card_info settings\n");
return -EINVAL;
}
priv->snd_card.name = cinfo->card;
dai_link->name = cinfo->name;
dai_link->stream_name = cinfo->name;
dai_link->platform_name = cinfo->platform;
dai_link->codec_name = cinfo->codec;
dai_link->cpu_dai_name = cinfo->cpu_dai.name;
dai_link->codec_dai_name = cinfo->codec_dai.name;
memcpy(&priv->cpu_dai, &cinfo->cpu_dai,
sizeof(priv->cpu_dai));
memcpy(&priv->codec_dai, &cinfo->codec_dai,
sizeof(priv->codec_dai));
}
/*
* init snd_soc_dai_link
*/
dai_link->init = asoc_simple_card_dai_init;
snd_soc_card_set_drvdata(&priv->snd_card, priv);
return devm_snd_soc_register_card(&pdev->dev, &priv->snd_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",
.owner = THIS_MODULE,
.of_match_table = asoc_simple_of_match,
},
.probe = asoc_simple_card_probe,
};
module_platform_driver(asoc_simple_card);
MODULE_ALIAS("platform:asoc-simple-card");
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("ASoC Simple Sound Card");
MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");