132 lines
3.3 KiB
C
132 lines
3.3 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* ADAU7002 Stereo PDM-to-I2S/TDM converter driver
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*
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* Copyright 2014-2016 Analog Devices
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* Author: Lars-Peter Clausen <lars@metafoo.de>
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*/
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#include <linux/acpi.h>
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#include <linux/delay.h>
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/of.h>
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#include <linux/platform_device.h>
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#include <sound/soc.h>
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struct adau7002_priv {
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int wakeup_delay;
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};
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static int adau7002_aif_event(struct snd_soc_dapm_widget *w,
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struct snd_kcontrol *kcontrol, int event)
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{
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struct snd_soc_component *component =
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snd_soc_dapm_to_component(w->dapm);
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struct adau7002_priv *adau7002 =
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snd_soc_component_get_drvdata(component);
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switch (event) {
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case SND_SOC_DAPM_POST_PMU:
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if (adau7002->wakeup_delay)
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msleep(adau7002->wakeup_delay);
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break;
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}
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return 0;
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}
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static int adau7002_component_probe(struct snd_soc_component *component)
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{
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struct adau7002_priv *adau7002;
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adau7002 = devm_kzalloc(component->dev, sizeof(*adau7002),
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GFP_KERNEL);
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if (!adau7002)
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return -ENOMEM;
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device_property_read_u32(component->dev, "wakeup-delay-ms",
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&adau7002->wakeup_delay);
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snd_soc_component_set_drvdata(component, adau7002);
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return 0;
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}
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static const struct snd_soc_dapm_widget adau7002_widgets[] = {
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SND_SOC_DAPM_AIF_OUT_E("ADAU AIF", "Capture", 0,
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SND_SOC_NOPM, 0, 0, adau7002_aif_event,
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SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_POST_PMD),
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SND_SOC_DAPM_INPUT("PDM_DAT"),
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SND_SOC_DAPM_REGULATOR_SUPPLY("IOVDD", 0, 0),
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};
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static const struct snd_soc_dapm_route adau7002_routes[] = {
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{ "ADAU AIF", NULL, "PDM_DAT"},
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{ "Capture", NULL, "PDM_DAT" },
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{ "Capture", NULL, "IOVDD" },
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};
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static struct snd_soc_dai_driver adau7002_dai = {
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.name = "adau7002-hifi",
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.capture = {
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.stream_name = "Capture",
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.channels_min = 2,
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.channels_max = 2,
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.rates = SNDRV_PCM_RATE_8000_96000,
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.formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S18_3LE |
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SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S24_LE |
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SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_S32_LE,
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.sig_bits = 20,
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},
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};
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static const struct snd_soc_component_driver adau7002_component_driver = {
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.probe = adau7002_component_probe,
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.dapm_widgets = adau7002_widgets,
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.num_dapm_widgets = ARRAY_SIZE(adau7002_widgets),
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.dapm_routes = adau7002_routes,
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.num_dapm_routes = ARRAY_SIZE(adau7002_routes),
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.idle_bias_on = 1,
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.use_pmdown_time = 1,
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.endianness = 1,
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};
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static int adau7002_probe(struct platform_device *pdev)
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{
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return devm_snd_soc_register_component(&pdev->dev,
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&adau7002_component_driver,
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&adau7002_dai, 1);
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}
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#ifdef CONFIG_OF
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static const struct of_device_id adau7002_dt_ids[] = {
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{ .compatible = "adi,adau7002", },
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{ }
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};
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MODULE_DEVICE_TABLE(of, adau7002_dt_ids);
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#endif
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#ifdef CONFIG_ACPI
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static const struct acpi_device_id adau7002_acpi_match[] = {
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{ "ADAU7002", 0 },
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{},
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};
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MODULE_DEVICE_TABLE(acpi, adau7002_acpi_match);
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#endif
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static struct platform_driver adau7002_driver = {
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.driver = {
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.name = "adau7002",
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.of_match_table = of_match_ptr(adau7002_dt_ids),
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.acpi_match_table = ACPI_PTR(adau7002_acpi_match),
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},
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.probe = adau7002_probe,
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};
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module_platform_driver(adau7002_driver);
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MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
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MODULE_DESCRIPTION("ADAU7002 Stereo PDM-to-I2S/TDM Converter driver");
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MODULE_LICENSE("GPL v2");
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