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// SPDX-License-Identifier: GPL-2.0
/*
* mtk-soundcard-driver.c -- MediaTek soundcard driver common
*
* Copyright (c) 2022 MediaTek Inc.
* Author: Trevor Wu <trevor.wu@mediatek.com>
*/
#include <linux/module.h>
#include <linux/of.h>
#include <sound/soc.h>
#include "mtk-soundcard-driver.h"
static int set_card_codec_info(struct snd_soc_card *card,
struct device_node *sub_node,
struct snd_soc_dai_link *dai_link)
{
struct device *dev = card->dev;
struct device_node *codec_node;
int ret;
codec_node = of_get_child_by_name(sub_node, "codec");
if (!codec_node) {
dev_dbg(dev, "%s no specified codec: setting dummy.\n", dai_link->name);
dai_link->codecs = &snd_soc_dummy_dlc;
dai_link->num_codecs = 1;
dai_link->dynamic = 1;
return 0;
}
/* set card codec info */
ret = snd_soc_of_get_dai_link_codecs(dev, codec_node, dai_link);
of_node_put(codec_node);
if (ret < 0)
return dev_err_probe(dev, ret, "%s: codec dai not found\n",
dai_link->name);
return 0;
}
static int set_dailink_daifmt(struct snd_soc_card *card,
struct device_node *sub_node,
struct snd_soc_dai_link *dai_link)
{
unsigned int daifmt;
const char *str;
int ret;
struct {
char *name;
unsigned int val;
} of_clk_table[] = {
{ "cpu", SND_SOC_DAIFMT_CBC_CFC },
{ "codec", SND_SOC_DAIFMT_CBP_CFP },
};
daifmt = snd_soc_daifmt_parse_format(sub_node, NULL);
if (daifmt) {
dai_link->dai_fmt &= SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK;
dai_link->dai_fmt |= daifmt;
}
/*
* check "mediatek,clk-provider = xxx"
* SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK area
*/
ret = of_property_read_string(sub_node, "mediatek,clk-provider", &str);
if (ret == 0) {
int i;
for (i = 0; i < ARRAY_SIZE(of_clk_table); i++) {
if (strcmp(str, of_clk_table[i].name) == 0) {
dai_link->dai_fmt &= ~SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK;
dai_link->dai_fmt |= of_clk_table[i].val;
break;
}
}
}
return 0;
}
int parse_dai_link_info(struct snd_soc_card *card)
{
struct device *dev = card->dev;
struct device_node *sub_node;
struct snd_soc_dai_link *dai_link;
const char *dai_link_name;
int ret, i;
/* Loop over all the dai link sub nodes */
for_each_available_child_of_node(dev->of_node, sub_node) {
if (of_property_read_string(sub_node, "link-name",
&dai_link_name)) {
of_node_put(sub_node);
return -EINVAL;
}
for_each_card_prelinks(card, i, dai_link) {
if (!strcmp(dai_link_name, dai_link->name))
break;
}
if (i >= card->num_links) {
of_node_put(sub_node);
return -EINVAL;
}
ret = set_card_codec_info(card, sub_node, dai_link);
if (ret < 0) {
of_node_put(sub_node);
return ret;
}
ret = set_dailink_daifmt(card, sub_node, dai_link);
if (ret < 0) {
of_node_put(sub_node);
return ret;
}
}
return 0;
}
EXPORT_SYMBOL_GPL(parse_dai_link_info);
void clean_card_reference(struct snd_soc_card *card)
{
struct snd_soc_dai_link *dai_link;
int i;
/* release codec reference gotten by set_card_codec_info */
for_each_card_prelinks(card, i, dai_link)
snd_soc_of_put_dai_link_codecs(dai_link);
}
EXPORT_SYMBOL_GPL(clean_card_reference);
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