path: root/sound/soc/mediatek/mt8186/mt8186-dai-i2s.c

// SPDX-License-Identifier: GPL-2.0
//
// MediaTek ALSA SoC Audio DAI I2S Control
//
// Copyright (c) 2022 MediaTek Inc.
// Author: Jiaxin Yu <jiaxin.yu@mediatek.com>

#include <linux/bitops.h>
#include <linux/regmap.h>
#include <sound/pcm_params.h>
#include "mt8186-afe-clk.h"
#include "mt8186-afe-common.h"
#include "mt8186-afe-gpio.h"
#include "mt8186-interconnection.h"

enum {
	I2S_FMT_EIAJ = 0,
	I2S_FMT_I2S = 1,
};

enum {
	I2S_WLEN_16_BIT = 0,
	I2S_WLEN_32_BIT = 1,
};

enum {
	I2S_HD_NORMAL = 0,
	I2S_HD_LOW_JITTER = 1,
};

enum {
	I2S1_SEL_O28_O29 = 0,
	I2S1_SEL_O03_O04 = 1,
};

enum {
	I2S_IN_PAD_CONNSYS = 0,
	I2S_IN_PAD_IO_MUX = 1,
};

struct mtk_afe_i2s_priv {
	int id;
	int rate; /* for determine which apll to use */
	int low_jitter_en;
	int master; /* only i2s0 has slave mode*/

	int share_i2s_id;

	int mclk_id;
	int mclk_rate;
	int mclk_apll;
};

static unsigned int get_i2s_wlen(snd_pcm_format_t format)
{
	return snd_pcm_format_physical_width(format) <= 16 ?
	       I2S_WLEN_16_BIT : I2S_WLEN_32_BIT;
}

#define MTK_AFE_I2S0_KCONTROL_NAME "I2S0_HD_Mux"
#define MTK_AFE_I2S1_KCONTROL_NAME "I2S1_HD_Mux"
#define MTK_AFE_I2S2_KCONTROL_NAME "I2S2_HD_Mux"
#define MTK_AFE_I2S3_KCONTROL_NAME "I2S3_HD_Mux"
#define MTK_AFE_I2S0_SRC_KCONTROL_NAME "I2S0_SRC_Mux"

#define I2S0_HD_EN_W_NAME "I2S0_HD_EN"
#define I2S1_HD_EN_W_NAME "I2S1_HD_EN"
#define I2S2_HD_EN_W_NAME "I2S2_HD_EN"
#define I2S3_HD_EN_W_NAME "I2S3_HD_EN"

#define I2S0_MCLK_EN_W_NAME "I2S0_MCLK_EN"
#define I2S1_MCLK_EN_W_NAME "I2S1_MCLK_EN"
#define I2S2_MCLK_EN_W_NAME "I2S2_MCLK_EN"
#define I2S3_MCLK_EN_W_NAME "I2S3_MCLK_EN"

static int get_i2s_id_by_name(struct mtk_base_afe *afe,
			      const char *name)
{
	if (strncmp(name, "I2S0", 4) == 0)
		return MT8186_DAI_I2S_0;
	else if (strncmp(name, "I2S1", 4) == 0)
		return MT8186_DAI_I2S_1;
	else if (strncmp(name, "I2S2", 4) == 0)
		return MT8186_DAI_I2S_2;
	else if (strncmp(name, "I2S3", 4) == 0)
		return MT8186_DAI_I2S_3;

	return -EINVAL;
}

static struct mtk_afe_i2s_priv *get_i2s_priv_by_name(struct mtk_base_afe *afe,
						     const char *name)
{
	struct mt8186_afe_private *afe_priv = afe->platform_priv;
	int dai_id = get_i2s_id_by_name(afe, name);

	if (dai_id < 0)
		return NULL;

	return afe_priv->dai_priv[dai_id];
}

/* low jitter control */
static const char * const mt8186_i2s_hd_str[] = {
	"Normal", "Low_Jitter"
};

static const struct soc_enum mt8186_i2s_enum[] = {
	SOC_ENUM_SINGLE_EXT(ARRAY_SIZE(mt8186_i2s_hd_str),
			    mt8186_i2s_hd_str),
};

static int mt8186_i2s_hd_get(struct snd_kcontrol *kcontrol,
			     struct snd_ctl_elem_value *ucontrol)
{
	struct snd_soc_component *cmpnt = snd_soc_kcontrol_component(kcontrol);
	struct mtk_base_afe *afe = snd_soc_component_get_drvdata(cmpnt);
	struct mtk_afe_i2s_priv *i2s_priv;

	i2s_priv = get_i2s_priv_by_name(afe, kcontrol->id.name);
	ucontrol->value.integer.value[0] = i2s_priv->low_jitter_en;

	return 0;
}

static int mt8186_i2s_hd_set(struct snd_kcontrol *kcontrol,
			     struct snd_ctl_elem_value *ucontrol)
{
	struct snd_soc_component *cmpnt = snd_soc_kcontrol_component(kcontrol);
	struct mtk_base_afe *afe = snd_soc_component_get_drvdata(cmpnt);
	struct mtk_afe_i2s_priv *i2s_priv;
	struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
	int hd_en;

	if (ucontrol->value.enumerated.item[0] >= e->