mt8186-dai-hw-gain.c

// SPDX-License-Identifier: GPL-2.0
//
// MediaTek ALSA SoC Audio DAI HW Gain Control
//
// Copyright (c) 2022 MediaTek Inc.
// Author: Jiaxin Yu <[email protected]>

#include <linux/regmap.h>
#include "mt8186-afe-common.h"
#include "mt8186-interconnection.h"

#define HW_GAIN_1_EN_W_NAME "HW GAIN 1 Enable"
#define HW_GAIN_2_EN_W_NAME "HW GAIN 2 Enable"

/* dai component */
static const struct snd_kcontrol_new mtk_hw_gain1_in_ch1_mix[] = {
	SOC_DAPM_SINGLE_AUTODISABLE("CONNSYS_I2S_CH1 Switch", AFE_CONN13_1,
				    I_CONNSYS_I2S_CH1, 1, 0),
};

static const struct snd_kcontrol_new mtk_hw_gain1_in_ch2_mix[] = {
	SOC_DAPM_SINGLE_AUTODISABLE("CONNSYS_I2S_CH2 Switch", AFE_CONN14_1,
				    I_CONNSYS_I2S_CH2, 1, 0),
};

static const struct snd_kcontrol_new mtk_hw_gain2_in_ch1_mix[] = {
	SOC_DAPM_SINGLE_AUTODISABLE("ADDA_UL_CH1 Switch", AFE_CONN15,
				    I_ADDA_UL_CH1, 1, 0),
};

static const struct snd_kcontrol_new mtk_hw_gain2_in_ch2_mix[] = {
	SOC_DAPM_SINGLE_AUTODISABLE("ADDA_UL_CH2 Switch", AFE_CONN16,
				    I_ADDA_UL_CH2, 1, 0),
};

static int mtk_hw_gain_event(struct snd_soc_dapm_widget *w,
			     struct snd_kcontrol *kcontrol,
			     int event)
{
	struct snd_soc_component *cmpnt = snd_soc_dapm_to_component(w->dapm);
	struct mtk_base_afe *afe = snd_soc_component_get_drvdata(cmpnt);
	unsigned int gain_cur;
	unsigned int gain_con1;

	dev_dbg(cmpnt->dev, "%s(), name %s, event 0x%x\n",
		__func__, w->name, event);

	switch (event) {
	case SND_SOC_DAPM_PRE_PMU:
		if (snd_soc_dapm_widget_name_cmp(w, HW_GAIN_1_EN_W_NAME) == 0) {
			gain_cur = AFE_GAIN1_CUR;
			gain_con1 = AFE_GAIN1_CON1;
		} else {
			gain_cur = AFE_GAIN2_CUR;
			gain_con1 = AFE_GAIN2_CON1;
		}

		/* let hw gain ramp up, set cur gain to 0 */
		regmap_update_bits(afe->regmap, gain_cur, AFE_GAIN1_CUR_MASK_SFT, 0);

		/* set target gain to 0 */
		regmap_update_bits(afe->regmap, gain_con1, GAIN1_TARGET_MASK_SFT, 0);
		break;
	default:
		break;
	}

	return 0;
}

static const struct snd_soc_dapm_widget mtk_dai_hw_gain_widgets[] = {
	/* inter-connections */
	SND_SOC_DAPM_MIXER("HW_GAIN1_IN_CH1", SND_SOC_NOPM, 0, 0,
			   mtk_hw_gain1_in_ch1_mix,
			   ARRAY_SIZE(mtk_hw_gain1_in_ch1_mix)),
	SND_SOC_DAPM_MIXER("HW_GAIN1_IN_CH2", SND_SOC_NOPM, 0, 0,
			   mtk_hw_gain1_in_ch2_mix,
			   ARRAY_SIZE(mtk_hw_gain1_in_ch2_mix)),
	SND_SOC_DAPM_MIXER("HW_GAIN2_IN_CH1", SND_SOC_NOPM, 0, 0,
			   mtk_hw_gain2_in_ch1_mix,
			   ARRAY_SIZE(mtk_hw_gain2_in_ch1_mix)),
	SND_SOC_DAPM_MIXER("HW_GAIN2_IN_CH2", SND_SOC_NOPM, 0, 0,
			   mtk_hw_gain2_in_ch2_mix,
			   ARRAY_SIZE(mtk_hw_gain2_in_ch2_mix)),

	SND_SOC_DAPM_SUPPLY(HW_GAIN_1_EN_W_NAME,
			    AFE_GAIN1_CON0, GAIN1_ON_SFT, 0,
			    mtk_hw_gain_event,
			    SND_SOC_DAPM_PRE_PMU),

	SND_SOC_DAPM_SUPPLY(HW_GAIN_2_EN_W_NAME,
			    AFE_GAIN2_CON0, GAIN2_ON_SFT, 0,
			    mtk_hw_gain_event,
			    SND_SOC_DAPM_PRE_PMU),

	SND_SOC_DAPM_INPUT("HW Gain 1 Out Endpoint"),
	SND_SOC_DAPM_INPUT("HW Gain 2 Out Endpoint"),
	SND_SOC_DAPM_OUTPUT("HW Gain 1 In Endpoint"),
};

static const struct snd_soc_dapm_route mtk_dai_hw_gain_routes[] = {
	{"HW Gain 1 In", NULL, "HW_GAIN1_IN_CH1"},
	{"HW Gain 1 In", NULL, "HW_GAIN1_IN_CH2"},
	{"HW Gain 2 In", NULL, "HW_GAIN2_IN_CH1"},
	{"HW Gain 2 In", NULL, "HW_GAIN2_IN_CH2"},

	{"HW Gain 1 In", NULL, HW_GAIN_1_EN_W_NAME},
	{"HW Gain 1 Out", NULL, HW_GAIN_1_EN_W_NAME},
	{"HW Gain 2 In", NULL, HW_GAIN_2_EN_W_NAME},
	{"HW Gain 2 Out", NULL, HW_GAIN_2_EN_W_NAME},

	{"HW Gain 1 In Endpoint", NULL, "HW Gain 1 In"},
	{"HW Gain 1 Out", NULL, "HW Gain 1 Out Endpoint"},
	{"HW Gain 2 Out", NULL, "HW Gain 2 Out Endpoint"},
};

static const struct snd_kcontrol_new mtk_hw_gain_controls[] = {
	SOC_SINGLE("HW Gain 1 Volume", AFE_GAIN1_CON1,
		   GAIN1_TARGET_SFT, GAIN1_TARGET_MASK, 0),
	SOC_SINGLE("HW Gain 2 Volume", AFE_GAIN2_CON1,
		   GAIN2_TARGET_SFT, GAIN2_TARGET_MASK, 0),
};

/* dai ops */
static int mtk_dai_gain_hw_params(struct snd_pcm_substream *substream,
				  struct snd_pcm_hw_params *params,
				  struct snd_soc_dai *dai)
{
	struct mtk_base_afe *afe = snd_soc_dai_get_drvdata(dai);
	unsigned int rate = params_rate(params);
	unsigned int rate_reg = mt8186_rate_transform(afe->dev, rate, dai->id);

	dev_dbg(afe->dev, "%s(), id %d, stream %d, rate %d\n",
		__func__, dai->id, substream->stream, rate);

	/* rate */
	regmap_update_bits(afe->regmap,
			   dai->id == MT8186_DAI_HW_GAIN_1 ?
			   AFE_GAIN1_CON0 : AFE_GAIN2_CON0,
			   GAIN1_MODE_MASK_SFT,
			   rate_reg << GAIN1_MODE_SFT);

	/* sample per step */
	regmap_update_bits(afe->regmap,
			   dai->id == MT8186_DAI_HW_GAIN_1 ?
			   AFE_GAIN1_CON0 : AFE_GAIN2_CON0,
			   GAIN1_SAMPLE_PER_STEP_MASK_SFT,
			   (dai->id == MT8186_DAI_HW_GAIN_1 ? 0x40 : 0x0) <<
			   GAIN1_SAMPLE_PER_STEP_SFT);

	return 0;
}

static const struct snd_soc_dai_ops mtk_dai_gain_ops = {
	.hw_params = mtk_dai_gain_hw_params,
};

/* dai driver */
#define MTK_HW_GAIN_RATES (SNDRV_PCM_RATE_8000_48000 |\
			   SNDRV_PCM_RATE_88200 |\
			   SNDRV_PCM_RATE_96000 |\
			   SNDRV_PCM_RATE_176400 |\
			   SNDRV_PCM_RATE_192000)

#define MTK_HW_GAIN_FORMATS (SNDRV_PCM_FMTBIT_S16_LE |\
			     SNDRV_PCM_FMTBIT_S24_LE |\
			     SNDRV_PCM_FMTBIT_S32_LE)

static struct snd_soc_dai_driver mtk_dai_gain_driver[] = {
	{
		.name = "HW Gain 1",
		.id = MT8186_DAI_HW_GAIN_1,
		.playback = {
			.stream_name = "HW Gain 1 In",
			.channels_min = 1,
			.channels_max = 2,
			.rates = MTK_HW_GAIN_RATES,
			.formats = MTK_HW_GAIN_FORMATS,
		},
		.capture = {
			.stream_name = "HW Gain 1 Out",
			.channels_min = 1,
			.channels_max = 2,
			.rates = MTK_HW_GAIN_RATES,
			.formats = MTK_HW_GAIN_FORMATS,
		},
		.ops = &mtk_dai_gain_ops,
		.symmetric_rate = 1,
		.symmetric_channels = 1,
		.symmetric_sample_bits = 1,
	},
	{
		.name = "HW Gain 2",
		.id = MT8186_DAI_HW_GAIN_2,
		.playback = {
			.stream_name = "HW Gain 2 In",
			.channels_min = 1,
			.channels_max = 2,
			.rates = MTK_HW_GAIN_RATES,
			.formats = MTK_HW_GAIN_FORMATS,
		},
		.capture = {
			.stream_name = "HW Gain 2 Out",
			.channels_min = 1,
			.channels_max = 2,
			.rates = MTK_HW_GAIN_RATES,
			.formats = MTK_HW_GAIN_FORMATS,
		},
		.ops = &mtk_dai_gain_ops,
		.symmetric_rate = 1,
		.symmetric_channels = 1,
		.symmetric_sample_bits = 1,
	},
};

int mt8186_dai_hw_gain_register(struct mtk_base_afe *afe)
{
	struct mtk_base_afe_dai *dai;

	dai = devm_kzalloc(afe->dev, sizeof(*dai), GFP_KERNEL);
	if (!dai)
		return -ENOMEM;

	list_add(&dai->list, &afe->sub_dais);

	dai->dai_drivers = mtk_dai_gain_driver;
	dai->num_dai_drivers = ARRAY_SIZE(mtk_dai_gain_driver);

	dai->controls = mtk_hw_gain_controls;
	dai->num_controls = ARRAY_SIZE(mtk_hw_gain_controls);
	dai->dapm_widgets = mtk_dai_hw_gain_widgets;
	dai->num_dapm_widgets = ARRAY_SIZE(mtk_dai_hw_gain_widgets);
	dai->dapm_routes = mtk_dai_hw_gain_routes;
	dai->num_dapm_routes = ARRAY_SIZE(mtk_dai_hw_gain_routes);
	return 0;
}