// SPDX-License-Identifier: GPL-2.0-only
/*
 * ADAU7002 Stereo PDM-to-I2S/TDM converter driver
 *
 * Copyright 2014-2016 Analog Devices
 *  Author: Lars-Peter Clausen <lars@metafoo.de>
 */

#include <linux/acpi.h>
#include <linux/delay.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/platform_device.h>

#include <sound/soc.h>

struct adau7002_priv {
        int wakeup_delay;
};

static int adau7002_aif_event(struct snd_soc_dapm_widget *w,
                              struct snd_kcontrol *kcontrol, int event)
{
        struct snd_soc_component *component =
                        snd_soc_dapm_to_component(w->dapm);
        struct adau7002_priv *adau7002 =
                        snd_soc_component_get_drvdata(component);

        switch (event) {
        case SND_SOC_DAPM_POST_PMU:
                if (adau7002->wakeup_delay)
                        msleep(adau7002->wakeup_delay);
                break;
        }

        return 0;
}

static int adau7002_component_probe(struct snd_soc_component *component)
{
        struct adau7002_priv *adau7002;

        adau7002 = devm_kzalloc(component->dev, sizeof(*adau7002),
                                GFP_KERNEL);
        if (!adau7002)
                return -ENOMEM;

        device_property_read_u32(component->dev, "wakeup-delay-ms",
                                 &adau7002->wakeup_delay);

        snd_soc_component_set_drvdata(component, adau7002);

        return 0;
}

static const struct snd_soc_dapm_widget adau7002_widgets[] = {
        SND_SOC_DAPM_AIF_OUT_E("ADAU AIF", "Capture", 0,
                               SND_SOC_NOPM, 0, 0, adau7002_aif_event,
                               SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_POST_PMD),
        SND_SOC_DAPM_INPUT("PDM_DAT"),
        SND_SOC_DAPM_REGULATOR_SUPPLY("IOVDD", 0, 0),
};

static const struct snd_soc_dapm_route adau7002_routes[] = {
        { "ADAU AIF", NULL, "PDM_DAT"},
        { "Capture", NULL, "PDM_DAT" },
        { "Capture", NULL, "IOVDD" },
};

static struct snd_soc_dai_driver adau7002_dai = {
        .name = "adau7002-hifi",
        .capture = {
                .stream_name = "Capture",
                .channels_min = 2,
                .channels_max = 2,
                .rates = SNDRV_PCM_RATE_8000_96000,
                .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S18_3LE |
                        SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S24_LE |
                        SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_S32_LE,
                .sig_bits = 20,
        },
};

static const struct snd_soc_component_driver adau7002_component_driver = {
        .probe                  = adau7002_component_probe,
        .dapm_widgets           = adau7002_widgets,
        .num_dapm_widgets       = ARRAY_SIZE(adau7002_widgets),
        .dapm_routes            = adau7002_routes,
        .num_dapm_routes        = ARRAY_SIZE(adau7002_routes),
        .idle_bias_on           = 1,
        .use_pmdown_time        = 1,
        .endianness             = 1,
};

static int adau7002_probe(struct platform_device *pdev)
{
        return devm_snd_soc_register_component(&pdev->dev,
                        &adau7002_component_driver,
                        &adau7002_dai, 1);
}

#ifdef CONFIG_OF
static const struct of_device_id adau7002_dt_ids[] = {
        { .compatible = "adi,adau7002", },
        { }
};
MODULE_DEVICE_TABLE(of, adau7002_dt_ids);
#endif

#ifdef CONFIG_ACPI
static const struct acpi_device_id adau7002_acpi_match[] = {
        { "ADAU7002", 0 },
        {},
};
MODULE_DEVICE_TABLE(acpi, adau7002_acpi_match);
#endif

static struct platform_driver adau7002_driver = {
        .driver = {
                .name = "adau7002",
                .of_match_table = of_match_ptr(adau7002_dt_ids),
                .acpi_match_table = ACPI_PTR(adau7002_acpi_match),
        },
        .probe = adau7002_probe,
};
module_platform_driver(adau7002_driver);

MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
MODULE_DESCRIPTION("ADAU7002 Stereo PDM-to-I2S/TDM Converter driver");
MODULE_LICENSE("GPL v2");