ASoC: mediatek: mt8365: Add audio clock control support

Add audio clock wrapper and audio tuner control.

Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Signed-off-by: Alexandre Mergnat <amergnat@baylibre.com>
Link: https://patch.msgid.link/20240226-audio-i350-v7-5-6518d953a141@baylibre.com
Signed-off-by: Mark Brown <broonie@kernel.org>

2 files changed, 453 insertions, 0 deletions

diff --git a/sound/soc/mediatek/mt8365/mt8365-afe-clk.c b/sound/soc/mediatek/mt8365/mt8365-afe-clk.c
new file mode 100644
index 000000000000..300d1f0ae660
--- /dev/null
+++ b/sound/soc/mediatek/mt8365/mt8365-afe-clk.c
@@ -0,0 +1,421 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * MediaTek 8365 AFE clock control
+ *
+ * Copyright (c) 2024 MediaTek Inc.
+ * Authors: Jia Zeng <jia.zeng@mediatek.com>
+ *          Alexandre Mergnat <amergnat@baylibre.com>
+ */
+
+#include "mt8365-afe-clk.h"
+#include "mt8365-afe-common.h"
+#include "mt8365-reg.h"
+#include "../common/mtk-base-afe.h"
+#include <linux/device.h>
+#include <linux/mfd/syscon.h>
+
+static const char *aud_clks[MT8365_CLK_NUM] = {
+	[MT8365_CLK_TOP_AUD_SEL] = "top_audio_sel",
+	[MT8365_CLK_AUD_I2S0_M] = "audio_i2s0_m",
+	[MT8365_CLK_AUD_I2S1_M] = "audio_i2s1_m",
+	[MT8365_CLK_AUD_I2S2_M] = "audio_i2s2_m",
+	[MT8365_CLK_AUD_I2S3_M] = "audio_i2s3_m",
+	[MT8365_CLK_ENGEN1] = "engen1",
+	[MT8365_CLK_ENGEN2] = "engen2",
+	[MT8365_CLK_AUD1] = "aud1",
+	[MT8365_CLK_AUD2] = "aud2",
+	[MT8365_CLK_I2S0_M_SEL] = "i2s0_m_sel",
+	[MT8365_CLK_I2S1_M_SEL] = "i2s1_m_sel",
+	[MT8365_CLK_I2S2_M_SEL] = "i2s2_m_sel",
+	[MT8365_CLK_I2S3_M_SEL] = "i2s3_m_sel",
+	[MT8365_CLK_CLK26M] = "top_clk26m_clk",
+};
+
+int mt8365_afe_init_audio_clk(struct mtk_base_afe *afe)
+{
+	size_t i;
+	struct mt8365_afe_private *afe_priv = afe->platform_priv;
+
+	for (i = 0; i < ARRAY_SIZE(aud_clks); i++) {
+		afe_priv->clocks[i] = devm_clk_get(afe->dev, aud_clks[i]);
+		if (IS_ERR(afe_priv->clocks[i])) {
+			dev_err(afe->dev, "%s devm_clk_get %s fail\n",
+				__func__, aud_clks[i]);
+			return PTR_ERR(afe_priv->clocks[i]);
+		}
+	}
+	return 0;
+}
+
+void mt8365_afe_disable_clk(struct mtk_base_afe *afe, struct clk *clk)
+{
+	if (clk)
+		clk_disable_unprepare(clk);
+}
+
+int mt8365_afe_set_clk_rate(struct mtk_base_afe *afe, struct clk *clk,
+			    unsigned int rate)
+{
+	int ret;
+
+	if (clk) {
+		ret = clk_set_rate(clk, rate);
+		if (ret) {
+			dev_err(afe->dev, "Failed to set rate\n");
+			return ret;
+		}
+	}
+	return 0;
+}
+
+int mt8365_afe_set_clk_parent(struct mtk_base_afe *afe, struct clk *clk,
+			      struct clk *parent)
+{
+	int ret;
+
+	if (clk && parent) {
+		ret = clk_set_parent(clk, parent);
+		if (ret) {
+			dev_err(afe->dev, "Failed to set parent\n");
+			return ret;
+		}
+	}
+	return 0;
+}
+
+static unsigned int get_top_cg_reg(unsigned int cg_type)
+{
+	switch (cg_type) {
+	case MT8365_TOP_CG_AFE:
+	case MT8365_TOP_CG_I2S_IN:
+	case MT8365_TOP_CG_22M:
+	case MT8365_TOP_CG_24M:
+	case MT8365_TOP_CG_INTDIR_CK:
+	case MT8365_TOP_CG_APLL2_TUNER:
+	case MT8365_TOP_CG_APLL_TUNER:
+	case MT8365_TOP_CG_SPDIF:
+	case MT8365_TOP_CG_TDM_OUT:
+	case MT8365_TOP_CG_TDM_IN:
+	case MT8365_TOP_CG_ADC:
+	case MT8365_TOP_CG_DAC:
+	case MT8365_TOP_CG_DAC_PREDIS:
+	case MT8365_TOP_CG_TML:
+		return AUDIO_TOP_CON0;
+	case MT8365_TOP_CG_I2S1_BCLK:
+	case MT8365_TOP_CG_I2S2_BCLK:
+	case MT8365_TOP_CG_I2S3_BCLK:
+	case MT8365_TOP_CG_I2S4_BCLK:
+	case MT8365_TOP_CG_DMIC0_ADC:
+	case MT8365_TOP_CG_DMIC1_ADC:
+	case MT8365_TOP_CG_DMIC2_ADC:
+	case MT8365_TOP_CG_DMIC3_ADC:
+	case MT8365_TOP_CG_CONNSYS_I2S_ASRC:
+	case MT8365_TOP_CG_GENERAL1_ASRC:
+	case MT8365_TOP_CG_GENERAL2_ASRC:
+	case MT8365_TOP_CG_TDM_ASRC:
+		return AUDIO_TOP_CON1;
+	default:
+		return 0;
+	}
+}
+
+static unsigned int get_top_cg_mask(unsigned int cg_type)
+{
+	switch (cg_type) {
+	case MT8365_TOP_CG_AFE:
+		return AUD_TCON0_PDN_AFE;
+	case MT8365_TOP_CG_I2S_IN:
+		return AUD_TCON0_PDN_I2S_IN;
+	case MT8365_TOP_CG_22M:
+		return AUD_TCON0_PDN_22M;
+	case MT8365_TOP_CG_24M:
+		return AUD_TCON0_PDN_24M;
+	case MT8365_TOP_CG_INTDIR_CK:
+		return AUD_TCON0_PDN_INTDIR;
+	case MT8365_TOP_CG_APLL2_TUNER:
+		return AUD_TCON0_PDN_APLL2_TUNER;
+	case MT8365_TOP_CG_APLL_TUNER:
+		return AUD_TCON0_PDN_APLL_TUNER;
+	case MT8365_TOP_CG_SPDIF:
+		return AUD_TCON0_PDN_SPDIF;
+	case MT8365_TOP_CG_TDM_OUT:
+		return AUD_TCON0_PDN_TDM_OUT;
+	case MT8365_TOP_CG_TDM_IN:
+		return AUD_TCON0_PDN_TDM_IN;
+	case MT8365_TOP_CG_ADC:
+		return AUD_TCON0_PDN_ADC;
+	case MT8365_TOP_CG_DAC:
+		return AUD_TCON0_PDN_DAC;
+	case MT8365_TOP_CG_DAC_PREDIS:
+		return AUD_TCON0_PDN_DAC_PREDIS;
+	case MT8365_TOP_CG_TML:
+		return AUD_TCON0_PDN_TML;
+	case MT8365_TOP_CG_I2S1_BCLK:
+		return AUD_TCON1_PDN_I2S1_BCLK;
+	case MT8365_TOP_CG_I2S2_BCLK:
+		return AUD_TCON1_PDN_I2S2_BCLK;
+	case MT8365_TOP_CG_I2S3_BCLK:
+		return AUD_TCON1_PDN_I2S3_BCLK;
+	case MT8365_TOP_CG_I2S4_BCLK:
+		return AUD_TCON1_PDN_I2S4_BCLK;
+	case MT8365_TOP_CG_DMIC0_ADC:
+		return AUD_TCON1_PDN_DMIC0_ADC;
+	case MT8365_TOP_CG_DMIC1_ADC:
+		return AUD_TCON1_PDN_DMIC1_ADC;
+	case MT8365_TOP_CG_DMIC2_ADC:
+		return AUD_TCON1_PDN_DMIC2_ADC;
+	case MT8365_TOP_CG_DMIC3_ADC:
+		return AUD_TCON1_PDN_DMIC3_ADC;
+	case MT8365_TOP_CG_CONNSYS_I2S_ASRC:
+		return AUD_TCON1_PDN_CONNSYS_I2S_ASRC;
+	case MT8365_TOP_CG_GENERAL1_ASRC:
+		return AUD_TCON1_PDN_GENERAL1_ASRC;
+	case MT8365_TOP_CG_GENERAL2_ASRC:
+		return AUD_TCON1_PDN_GENERAL2_ASRC;
+	case MT8365_TOP_CG_TDM_ASRC:
+		return AUD_TCON1_PDN_TDM_ASRC;
+	default:
+		return 0;
+	}
+}
+
+static unsigned int get_top_cg_on_val(unsigned int cg_type)
+{
+	return 0;
+}
+
+static unsigned int get_top_cg_off_val(unsigned int cg_type)
+{
+	return get_top_cg_mask(cg_type);
+}
+
+int mt8365_afe_enable_top_cg(struct mtk_base_afe *afe, unsigned int cg_type)
+{
+	struct mt8365_afe_private *afe_priv = afe->platform_priv;
+	unsigned int reg = get_top_cg_reg(cg_type);
+	unsigned int mask = get_top_cg_mask(cg_type);
+	unsigned int val = get_top_cg_on_val(cg_type);
+	unsigned long flags;
+
+	spin_lock_irqsave(&afe_priv->afe_ctrl_lock, flags);
+
+	afe_priv->top_cg_ref_cnt[cg_type]++;
+	if (afe_priv->top_cg_ref_cnt[cg_type] == 1)
+		regmap_update_bits(afe->regmap, reg, mask, val);
+
+	spin_unlock_irqrestore(&afe_priv->afe_ctrl_lock, flags);
+
+	return 0;
+}
+
+int mt8365_afe_disable_top_cg(struct mtk_base_afe *afe, unsigned int cg_type)
+{
+	struct mt8365_afe_private *afe_priv = afe->platform_priv;
+	unsigned int reg = get_top_cg_reg(cg_type);
+	unsigned int mask = get_top_cg_mask(cg_type);
+	unsigned int val = get_top_cg_off_val(cg_type);
+	unsigned long flags;
+
+	spin_lock_irqsave(&afe_priv->afe_ctrl_lock, flags);
+
+	afe_priv->top_cg_ref_cnt[cg_type]--;
+	if (afe_priv->top_cg_ref_cnt[cg_type] == 0)
+		regmap_update_bits(afe->regmap, reg, mask, val);
+	else if (afe_priv->top_cg_ref_cnt[cg_type] < 0)
+		afe_priv->top_cg_ref_cnt[cg_type] = 0;
+
+	spin_unlock_irqrestore(&afe_priv->afe_ctrl_lock, flags);
+
+	return 0;
+}
+
+int mt8365_afe_enable_main_clk(struct mtk_base_afe *afe)
+{
+	struct mt8365_afe_private *afe_priv = afe->platform_priv;
+
+	clk_prepare_enable(afe_priv->clocks[MT8365_CLK_TOP_AUD_SEL]);
+	mt8365_afe_enable_top_cg(afe, MT8365_TOP_CG_AFE);
+	mt8365_afe_enable_afe_on(afe);
+
+	return 0;
+}
+
+int mt8365_afe_disable_main_clk(struct mtk_base_afe *afe)
+{
+	struct mt8365_afe_private *afe_priv = afe->platform_priv;
+
+	mt8365_afe_disable_afe_on(afe);
+	mt8365_afe_disable_top_cg(afe, MT8365_TOP_CG_AFE);
+	mt8365_afe_disable_clk(afe, afe_priv->clocks[MT8365_CLK_TOP_AUD_SEL]);
+
+	return 0;
+}
+
+int mt8365_afe_emi_clk_on(struct mtk_base_afe *afe)
+{
+	return 0;
+}
+
+int mt8365_afe_emi_clk_off(struct mtk_base_afe *afe)
+{
+	return 0;
+}
+
+int mt8365_afe_enable_afe_on(struct mtk_base_afe *afe)
+{
+	struct mt8365_afe_private *afe_priv = afe->platform_priv;
+	unsigned long flags;
+
+	spin_lock_irqsave(&afe_priv->afe_ctrl_lock, flags);
+
+	afe_priv->afe_on_ref_cnt++;
+	if (afe_priv->afe_on_ref_cnt == 1)
+		regmap_update_bits(afe->regmap, AFE_DAC_CON0, 0x1, 0x1);
+
+	spin_unlock_irqrestore(&afe_priv->afe_ctrl_lock, flags);
+
+	return 0;
+}
+
+int mt8365_afe_disable_afe_on(struct mtk_base_afe *afe)
+{
+	struct mt8365_afe_private *afe_priv = afe->platform_priv;
+	unsigned long flags;
+
+	spin_lock_irqsave(&afe_priv->afe_ctrl_lock, flags);
+
+	afe_priv->afe_on_ref_cnt--;
+	if (afe_priv->afe_on_ref_cnt == 0)
+		regmap_update_bits(afe->regmap, AFE_DAC_CON0, 0x1, 0x0);
+	else if (afe_priv->afe_on_ref_cnt < 0)
+		afe_priv->afe_on_ref_cnt = 0;
+
+	spin_unlock_irqrestore(&afe_priv->afe_ctrl_lock, flags);
+
+	return 0;
+}
+
+int mt8365_afe_hd_engen_enable(struct mtk_base_afe *afe, bool apll1)
+{
+	if (apll1)
+		regmap_update_bits(afe->regmap, AFE_HD_ENGEN_ENABLE,
+				   AFE_22M_PLL_EN, AFE_22M_PLL_EN);
+	else
+		regmap_update_bits(afe->regmap, AFE_HD_ENGEN_ENABLE,
+				   AFE_24M_PLL_EN, AFE_24M_PLL_EN);
+
+	return 0;
+}
+
+int mt8365_afe_hd_engen_disable(struct mtk_base_afe *afe, bool apll1)
+{
+	if (apll1)
+		regmap_update_bits(afe->regmap, AFE_HD_ENGEN_ENABLE,
+				   AFE_22M_PLL_EN, ~AFE_22M_PLL_EN);
+	else
+		regmap_update_bits(afe->regmap, AFE_HD_ENGEN_ENABLE,
+				   AFE_24M_PLL_EN, ~AFE_24M_PLL_EN);
+
+	return 0;
+}
+
+int mt8365_afe_enable_apll_tuner_cfg(struct mtk_base_afe *afe, unsigned int apll)
+{
+	struct mt8365_afe_private *afe_priv = afe->platform_priv;
+
+	mutex_lock(&afe_priv->afe_clk_mutex);
+
+	afe_priv->apll_tuner_ref_cnt[apll]++;
+	if (afe_priv->apll_tuner_ref_cnt[apll] != 1) {
+		mutex_unlock(&afe_priv->afe_clk_mutex);
+		return 0;
+	}
+
+	if (apll == MT8365_AFE_APLL1) {
+		regmap_update_bits(afe->regmap, AFE_APLL_TUNER_CFG,
+				   AFE_APLL_TUNER_CFG_MASK, 0x432);
+		regmap_update_bits(afe->regmap, AFE_APLL_TUNER_CFG,
+				   AFE_APLL_TUNER_CFG_EN_MASK, 0x1);
+	} else {
+		regmap_update_bits(afe->regmap, AFE_APLL_TUNER_CFG1,
+				   AFE_APLL_TUNER_CFG1_MASK, 0x434);
+		regmap_update_bits(afe->regmap, AFE_APLL_TUNER_CFG1,
+				   AFE_APLL_TUNER_CFG1_EN_MASK, 0x1);
+	}
+
+	mutex_unlock(&afe_priv->afe_clk_mutex);
+	return 0;
+}
+
+int mt8365_afe_disable_apll_tuner_cfg(struct mtk_base_afe *afe, unsigned int apll)
+{
+	struct mt8365_afe_private *afe_priv = afe->platform_priv;
+
+	mutex_lock(&afe_priv->afe_clk_mutex);
+
+	afe_priv->apll_tuner_ref_cnt[apll]--;
+	if (afe_priv->apll_tuner_ref_cnt[apll] == 0) {
+		if (apll == MT8365_AFE_APLL1)
+			regmap_update_bits(afe->regmap, AFE_APLL_TUNER_CFG,
+					   AFE_APLL_TUNER_CFG_EN_MASK, 0x0);
+		else
+			regmap_update_bits(afe->regmap, AFE_APLL_TUNER_CFG1,
+					   AFE_APLL_TUNER_CFG1_EN_MASK, 0x0);
+
+	} else if (afe_priv->apll_tuner_ref_cnt[apll] < 0) {
+		afe_priv->apll_tuner_ref_cnt[apll] = 0;
+	}
+
+	mutex_unlock(&afe_priv->afe_clk_mutex);
+	return 0;
+}
+
+int mt8365_afe_enable_apll_associated_cfg(struct mtk_base_afe *afe, unsigned int apll)
+{
+	struct mt8365_afe_private *afe_priv = afe->platform_priv;
+
+	if (apll == MT8365_AFE_APLL1) {
+		if (clk_prepare_enable(afe_priv->clocks[MT8365_CLK_ENGEN1])) {
+			dev_info(afe->dev, "%s Failed to enable ENGEN1 clk\n",
+				 __func__);
+			return 0;
+		}
+		mt8365_afe_enable_top_cg(afe, MT8365_TOP_CG_22M);
+		mt8365_afe_hd_engen_enable(afe, true);
+		mt8365_afe_enable_top_cg(afe, MT8365_TOP_CG_APLL_TUNER);
+		mt8365_afe_enable_apll_tuner_cfg(afe, MT8365_AFE_APLL1);
+	} else {
+		if (clk_prepare_enable(afe_priv->clocks[MT8365_CLK_ENGEN2])) {
+			dev_info(afe->dev, "%s Failed to enable ENGEN2 clk\n",
+				 __func__);
+			return 0;
+		}
+		mt8365_afe_enable_top_cg(afe, MT8365_TOP_CG_24M);
+		mt8365_afe_hd_engen_enable(afe, false);
+		mt8365_afe_enable_top_cg(afe, MT8365_TOP_CG_APLL2_TUNER);
+		mt8365_afe_enable_apll_tuner_cfg(afe, MT8365_AFE_APLL2);
+	}
+
+	return 0;
+}
+
+int mt8365_afe_disable_apll_associated_cfg(struct mtk_base_afe *afe, unsigned int apll)
+{
+	struct mt8365_afe_private *afe_priv = afe->platform_priv;
+
+	if (apll == MT8365_AFE_APLL1) {
+		mt8365_afe_disable_apll_tuner_cfg(afe, MT8365_AFE_APLL1);
+		mt8365_afe_disable_top_cg(afe, MT8365_TOP_CG_APLL_TUNER);
+		mt8365_afe_hd_engen_disable(afe, true);
+		mt8365_afe_disable_top_cg(afe, MT8365_TOP_CG_22M);
+		clk_disable_unprepare(afe_priv->clocks[MT8365_CLK_ENGEN1]);
+	} else {
+		mt8365_afe_disable_apll_tuner_cfg(afe, MT8365_AFE_APLL2);
+		mt8365_afe_disable_top_cg(afe, MT8365_TOP_CG_APLL2_TUNER);
+		mt8365_afe_hd_engen_disable(afe, false);
+		mt8365_afe_disable_top_cg(afe, MT8365_TOP_CG_24M);
+		clk_disable_unprepare(afe_priv->clocks[MT8365_CLK_ENGEN2]);
+	}
+
+	return 0;
+}
diff --git a/sound/soc/mediatek/mt8365/mt8365-afe-clk.h b/sound/soc/mediatek/mt8365/mt8365-afe-clk.h
new file mode 100644
index 000000000000..a6fa653f2183
--- /dev/null
+++ b/sound/soc/mediatek/mt8365/mt8365-afe-clk.h
@@ -0,0 +1,32 @@
+/* SPDX-License-Identifier: GPL-2.0
+ *
+ * MediaTek 8365 AFE clock control definitions
+ *
+ * Copyright (c) 2024 MediaTek Inc.
+ * Authors: Jia Zeng <jia.zeng@mediatek.com>
+ *          Alexandre Mergnat <amergnat@baylibre.com>
+ */
+
+#ifndef _MT8365_AFE_UTILS_H_
+#define _MT8365_AFE_UTILS_H_
+
+struct mtk_base_afe;
+struct clk;
+
+int mt8365_afe_init_audio_clk(struct mtk_base_afe *afe);
+void mt8365_afe_disable_clk(struct mtk_base_afe *afe, struct clk *clk);
+int mt8365_afe_set_clk_rate(struct mtk_base_afe *afe, struct clk *clk, unsigned int rate);
+int mt8365_afe_set_clk_parent(struct mtk_base_afe *afe, struct clk *clk, struct clk *parent);
+int mt8365_afe_enable_top_cg(struct mtk_base_afe *afe, unsigned int cg_type);
+int mt8365_afe_disable_top_cg(struct mtk_base_afe *afe, unsigned int cg_type);
+int mt8365_afe_enable_main_clk(struct mtk_base_afe *afe);
+int mt8365_afe_disable_main_clk(struct mtk_base_afe *afe);
+int mt8365_afe_emi_clk_on(struct mtk_base_afe *afe);
+int mt8365_afe_emi_clk_off(struct mtk_base_afe *afe);
+int mt8365_afe_enable_afe_on(struct mtk_base_afe *afe);
+int mt8365_afe_disable_afe_on(struct mtk_base_afe *afe);
+int mt8365_afe_enable_apll_tuner_cfg(struct mtk_base_afe *afe, unsigned int apll);
+int mt8365_afe_disable_apll_tuner_cfg(struct mtk_base_afe *afe, unsigned int apll);
+int mt8365_afe_enable_apll_associated_cfg(struct mtk_base_afe *afe, unsigned int apll);
+int mt8365_afe_disable_apll_associated_cfg(struct mtk_base_afe *afe, unsigned int apll);
+#endif