root/sound/soc/mediatek/mt8365/mt8365-mt6357.c
// SPDX-License-Identifier: GPL-2.0
/*
 * MediaTek MT8365 Sound Card driver
 *
 * Copyright (c) 2024 MediaTek Inc.
 * Authors: Nicolas Belin <nbelin@baylibre.com>
 */

#include <linux/array_size.h>
#include <linux/dev_printk.h>
#include <linux/err.h>
#include <linux/module.h>
#include <linux/pinctrl/consumer.h>
#include <linux/platform_device.h>
#include <linux/types.h>

#include <sound/soc.h>
#include <sound/pcm_params.h>

#include "mt8365-afe-common.h"
#include "../common/mtk-soc-card.h"
#include "../common/mtk-soundcard-driver.h"

enum pinctrl_pin_state {
        PIN_STATE_DEFAULT,
        PIN_STATE_DMIC,
        PIN_STATE_MISO_OFF,
        PIN_STATE_MISO_ON,
        PIN_STATE_MOSI_OFF,
        PIN_STATE_MOSI_ON,
        PIN_STATE_MAX
};

static const char * const mt8365_mt6357_pin_str[PIN_STATE_MAX] = {
        "default",
        "dmic",
        "miso_off",
        "miso_on",
        "mosi_off",
        "mosi_on",
};

struct mt8365_mt6357_priv {
        struct pinctrl *pinctrl;
        struct pinctrl_state *pin_states[PIN_STATE_MAX];
};

enum {
        /* FE */
        DAI_LINK_DL1_PLAYBACK = 0,
        DAI_LINK_DL2_PLAYBACK,
        DAI_LINK_AWB_CAPTURE,
        DAI_LINK_VUL_CAPTURE,
        /* BE */
        DAI_LINK_2ND_I2S_INTF,
        DAI_LINK_DMIC,
        DAI_LINK_INT_ADDA,
        DAI_LINK_NUM
};

static const struct snd_soc_dapm_widget mt8365_mt6357_widgets[] = {
        SND_SOC_DAPM_OUTPUT("HDMI Out"),
};

static const struct snd_soc_dapm_route mt8365_mt6357_routes[] = {
        {"HDMI Out", NULL, "2ND I2S Playback"},
        {"DMIC In", NULL, "MICBIAS0"},
};

static int mt8365_mt6357_int_adda_startup(struct snd_pcm_substream *substream)
{
        struct snd_soc_pcm_runtime *rtd = substream->private_data;
        struct mt8365_mt6357_priv *priv = snd_soc_card_get_drvdata(rtd->card);
        int ret = 0;

        if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
                if (IS_ERR(priv->pin_states[PIN_STATE_MOSI_ON]))
                        return ret;

                ret = pinctrl_select_state(priv->pinctrl,
                                           priv->pin_states[PIN_STATE_MOSI_ON]);
                if (ret)
                        dev_err(rtd->card->dev, "%s failed to select state %d\n",
                                __func__, ret);
        }

        if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
                if (IS_ERR(priv->pin_states[PIN_STATE_MISO_ON]))
                        return ret;

                ret = pinctrl_select_state(priv->pinctrl,
                                           priv->pin_states[PIN_STATE_MISO_ON]);
                if (ret)
                        dev_err(rtd->card->dev, "%s failed to select state %d\n",
                                __func__, ret);
        }

        return 0;
}

static void mt8365_mt6357_int_adda_shutdown(struct snd_pcm_substream *substream)
{
        struct snd_soc_pcm_runtime *rtd = substream->private_data;
        struct mt8365_mt6357_priv *priv = snd_soc_card_get_drvdata(rtd->card);
        int ret = 0;

        if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
                if (IS_ERR(priv->pin_states[PIN_STATE_MOSI_OFF]))
                        return;

                ret = pinctrl_select_state(priv->pinctrl,
                                           priv->pin_states[PIN_STATE_MOSI_OFF]);
                if (ret)
                        dev_err(rtd->card->dev, "%s failed to select state %d\n",
                                __func__, ret);
        }

        if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
                if (IS_ERR(priv->pin_states[PIN_STATE_MISO_OFF]))
                        return;

                ret = pinctrl_select_state(priv->pinctrl,
                                           priv->pin_states[PIN_STATE_MISO_OFF]);
                if (ret)
                        dev_err(rtd->card->dev, "%s failed to select state %d\n",
                                __func__, ret);
        }
}

static const struct snd_soc_ops mt8365_mt6357_int_adda_ops = {
        .startup = mt8365_mt6357_int_adda_startup,
        .shutdown = mt8365_mt6357_int_adda_shutdown,
};

SND_SOC_DAILINK_DEFS(playback1,
                     DAILINK_COMP_ARRAY(COMP_CPU("DL1")),
                     DAILINK_COMP_ARRAY(COMP_DUMMY()),
                     DAILINK_COMP_ARRAY(COMP_EMPTY()));
SND_SOC_DAILINK_DEFS(playback2,
                     DAILINK_COMP_ARRAY(COMP_CPU("DL2")),
                     DAILINK_COMP_ARRAY(COMP_DUMMY()),
                     DAILINK_COMP_ARRAY(COMP_EMPTY()));
SND_SOC_DAILINK_DEFS(awb_capture,
                     DAILINK_COMP_ARRAY(COMP_CPU("AWB")),
                     DAILINK_COMP_ARRAY(COMP_DUMMY()),
                     DAILINK_COMP_ARRAY(COMP_EMPTY()));
SND_SOC_DAILINK_DEFS(vul,
                     DAILINK_COMP_ARRAY(COMP_CPU("VUL")),
                     DAILINK_COMP_ARRAY(COMP_DUMMY()),
                     DAILINK_COMP_ARRAY(COMP_EMPTY()));

SND_SOC_DAILINK_DEFS(i2s3,
                     DAILINK_COMP_ARRAY(COMP_CPU("2ND I2S")),
                     DAILINK_COMP_ARRAY(COMP_DUMMY()),
                     DAILINK_COMP_ARRAY(COMP_EMPTY()));
SND_SOC_DAILINK_DEFS(dmic,
                     DAILINK_COMP_ARRAY(COMP_CPU("DMIC")),
                     DAILINK_COMP_ARRAY(COMP_DUMMY()),
                     DAILINK_COMP_ARRAY(COMP_EMPTY()));
SND_SOC_DAILINK_DEFS(primary_codec,
                     DAILINK_COMP_ARRAY(COMP_CPU("INT ADDA")),
                     DAILINK_COMP_ARRAY(COMP_CODEC("mt6357-sound", "mt6357-snd-codec-aif1")),
                     DAILINK_COMP_ARRAY(COMP_EMPTY()));

/* Digital audio interface glue - connects codec <---> CPU */
static struct snd_soc_dai_link mt8365_mt6357_dais[] = {
        /* Front End DAI links */
        [DAI_LINK_DL1_PLAYBACK] = {
                .name = "DL1_FE",
                .stream_name = "MultiMedia1_PLayback",
                .id = DAI_LINK_DL1_PLAYBACK,
                .trigger = {
                        SND_SOC_DPCM_TRIGGER_POST,
                        SND_SOC_DPCM_TRIGGER_POST
                },
                .dynamic = 1,
                .playback_only = 1,
                .dpcm_merged_rate = 1,
                SND_SOC_DAILINK_REG(playback1),
        },
        [DAI_LINK_DL2_PLAYBACK] = {
                .name = "DL2_FE",
                .stream_name = "MultiMedia2_PLayback",
                .id = DAI_LINK_DL2_PLAYBACK,
                .trigger = {
                        SND_SOC_DPCM_TRIGGER_POST,
                        SND_SOC_DPCM_TRIGGER_POST
                },
                .dynamic = 1,
                .playback_only = 1,
                .dpcm_merged_rate = 1,
                SND_SOC_DAILINK_REG(playback2),
        },
        [DAI_LINK_AWB_CAPTURE] = {
                .name = "AWB_FE",
                .stream_name = "DL1_AWB_Record",
                .id = DAI_LINK_AWB_CAPTURE,
                .trigger = {
                        SND_SOC_DPCM_TRIGGER_POST,
                        SND_SOC_DPCM_TRIGGER_POST
                },
                .dynamic = 1,
                .capture_only = 1,
                .dpcm_merged_rate = 1,
                SND_SOC_DAILINK_REG(awb_capture),
        },
        [DAI_LINK_VUL_CAPTURE] = {
                .name = "VUL_FE",
                .stream_name = "MultiMedia1_Capture",
                .id = DAI_LINK_VUL_CAPTURE,
                .trigger = {
                        SND_SOC_DPCM_TRIGGER_POST,
                        SND_SOC_DPCM_TRIGGER_POST
                },
                .dynamic = 1,
                .capture_only = 1,
                .dpcm_merged_rate = 1,
                SND_SOC_DAILINK_REG(vul),
        },
        /* Back End DAI links */
        [DAI_LINK_2ND_I2S_INTF] = {
                .name = "I2S_OUT_BE",
                .no_pcm = 1,
                .id = DAI_LINK_2ND_I2S_INTF,
                .dai_fmt = SND_SOC_DAIFMT_I2S |
                                SND_SOC_DAIFMT_NB_NF |
                                SND_SOC_DAIFMT_CBC_CFC,
                SND_SOC_DAILINK_REG(i2s3),
        },
        [DAI_LINK_DMIC] = {
                .name = "DMIC_BE",
                .no_pcm = 1,
                .id = DAI_LINK_DMIC,
                .capture_only = 1,
                SND_SOC_DAILINK_REG(dmic),
        },
        [DAI_LINK_INT_ADDA] = {
                .name = "MTK_Codec",
                .no_pcm = 1,
                .id = DAI_LINK_INT_ADDA,
                .ops = &mt8365_mt6357_int_adda_ops,
                SND_SOC_DAILINK_REG(primary_codec),
        },
};

static int mt8365_mt6357_gpio_probe(struct snd_soc_card *card)
{
        struct mt8365_mt6357_priv *priv = snd_soc_card_get_drvdata(card);
        struct device *dev = card->dev;
        int ret, i;

        priv->pinctrl = devm_pinctrl_get(dev);
        if (IS_ERR(priv->pinctrl)) {
                ret = PTR_ERR(priv->pinctrl);
                return dev_err_probe(dev, ret, "Failed to get pinctrl\n");
        }

        for (i = PIN_STATE_DEFAULT ; i < PIN_STATE_MAX ; i++) {
                priv->pin_states[i] = pinctrl_lookup_state(priv->pinctrl,
                                                           mt8365_mt6357_pin_str[i]);
                if (IS_ERR(priv->pin_states[i])) {
                        dev_info(dev, "No pin state for %s\n",
                                 mt8365_mt6357_pin_str[i]);
                } else {
                        ret = pinctrl_select_state(priv->pinctrl,
                                                   priv->pin_states[i]);
                        if (ret) {
                                dev_err_probe(dev, ret,
                                              "Failed to select pin state %s\n",
                                              mt8365_mt6357_pin_str[i]);
                                return ret;
                        }
                }
        }
        return 0;
}

static struct snd_soc_card mt8365_mt6357_soc_card = {
        .name = "mt8365-evk",
        .owner = THIS_MODULE,
        .dai_link = mt8365_mt6357_dais,
        .num_links = ARRAY_SIZE(mt8365_mt6357_dais),
        .dapm_widgets = mt8365_mt6357_widgets,
        .num_dapm_widgets = ARRAY_SIZE(mt8365_mt6357_widgets),
        .dapm_routes = mt8365_mt6357_routes,
        .num_dapm_routes = ARRAY_SIZE(mt8365_mt6357_routes),
};

static int mt8365_mt6357_dev_probe(struct mtk_soc_card_data *soc_card_data, bool legacy)
{
        struct mtk_platform_card_data *card_data = soc_card_data->card_data;
        struct snd_soc_card *card = card_data->card;
        struct device *dev = card->dev;
        struct mt8365_mt6357_priv *mach_priv;
        int ret;

        card->dev = dev;
        ret = parse_dai_link_info(card);
        if (ret)
                goto err;

        mach_priv = devm_kzalloc(dev, sizeof(*mach_priv),
                                 GFP_KERNEL);
        if (!mach_priv)
                return -ENOMEM;
        soc_card_data->mach_priv = mach_priv;
        snd_soc_card_set_drvdata(card, soc_card_data);
        mt8365_mt6357_gpio_probe(card);
        return 0;

err:
        clean_card_reference(card);
        return ret;
}

static const struct mtk_soundcard_pdata mt8365_mt6357_card = {
        .card_name = "mt8365-mt6357",
        .card_data = &(struct mtk_platform_card_data) {
                .card = &mt8365_mt6357_soc_card,
        },
        .soc_probe = mt8365_mt6357_dev_probe
};

static const struct of_device_id mt8365_mt6357_dt_match[] = {
        { .compatible = "mediatek,mt8365-mt6357", .data = &mt8365_mt6357_card },
        { /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, mt8365_mt6357_dt_match);

static struct platform_driver mt8365_mt6357_driver = {
        .driver = {
                   .name = "mt8365_mt6357",
                   .of_match_table = mt8365_mt6357_dt_match,
                   .pm = &snd_soc_pm_ops,
        },
        .probe = mtk_soundcard_common_probe,
};

module_platform_driver(mt8365_mt6357_driver);

/* Module information */
MODULE_DESCRIPTION("MT8365 EVK SoC machine driver");
MODULE_AUTHOR("Nicolas Belin <nbelin@baylibre.com>");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform: mt8365_mt6357");