cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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adau7002.c (3469B)

      1// SPDX-License-Identifier: GPL-2.0-only
      2/*
      3 * ADAU7002 Stereo PDM-to-I2S/TDM converter driver
      4 *
      5 * Copyright 2014-2016 Analog Devices
      6 *  Author: Lars-Peter Clausen <lars@metafoo.de>
      7 */
      8
      9#include <linux/acpi.h>
     10#include <linux/delay.h>
     11#include <linux/init.h>
     12#include <linux/module.h>
     13#include <linux/of.h>
     14#include <linux/platform_device.h>
     15
     16#include <sound/soc.h>
     17
     18struct adau7002_priv {
     19	int wakeup_delay;
     20};
     21
     22static int adau7002_aif_event(struct snd_soc_dapm_widget *w,
     23			      struct snd_kcontrol *kcontrol, int event)
     24{
     25	struct snd_soc_component *component =
     26			snd_soc_dapm_to_component(w->dapm);
     27	struct adau7002_priv *adau7002 =
     28			snd_soc_component_get_drvdata(component);
     29
     30	switch (event) {
     31	case SND_SOC_DAPM_POST_PMU:
     32		if (adau7002->wakeup_delay)
     33			msleep(adau7002->wakeup_delay);
     34		break;
     35	}
     36
     37	return 0;
     38}
     39
     40static int adau7002_component_probe(struct snd_soc_component *component)
     41{
     42	struct adau7002_priv *adau7002;
     43
     44	adau7002 = devm_kzalloc(component->dev, sizeof(*adau7002),
     45				GFP_KERNEL);
     46	if (!adau7002)
     47		return -ENOMEM;
     48
     49	device_property_read_u32(component->dev, "wakeup-delay-ms",
     50				 &adau7002->wakeup_delay);
     51
     52	snd_soc_component_set_drvdata(component, adau7002);
     53
     54	return 0;
     55}
     56
     57static const struct snd_soc_dapm_widget adau7002_widgets[] = {
     58	SND_SOC_DAPM_AIF_OUT_E("ADAU AIF", "Capture", 0,
     59			       SND_SOC_NOPM, 0, 0, adau7002_aif_event,
     60			       SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_POST_PMD),
     61	SND_SOC_DAPM_INPUT("PDM_DAT"),
     62	SND_SOC_DAPM_REGULATOR_SUPPLY("IOVDD", 0, 0),
     63};
     64
     65static const struct snd_soc_dapm_route adau7002_routes[] = {
     66	{ "ADAU AIF", NULL, "PDM_DAT"},
     67	{ "Capture", NULL, "PDM_DAT" },
     68	{ "Capture", NULL, "IOVDD" },
     69};
     70
     71static struct snd_soc_dai_driver adau7002_dai = {
     72	.name = "adau7002-hifi",
     73	.capture = {
     74		.stream_name = "Capture",
     75		.channels_min = 2,
     76		.channels_max = 2,
     77		.rates = SNDRV_PCM_RATE_8000_96000,
     78		.formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S18_3LE |
     79			SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S24_LE |
     80			SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_S32_LE,
     81		.sig_bits = 20,
     82	},
     83};
     84
     85static const struct snd_soc_component_driver adau7002_component_driver = {
     86	.probe			= adau7002_component_probe,
     87	.dapm_widgets		= adau7002_widgets,
     88	.num_dapm_widgets	= ARRAY_SIZE(adau7002_widgets),
     89	.dapm_routes		= adau7002_routes,
     90	.num_dapm_routes	= ARRAY_SIZE(adau7002_routes),
     91	.idle_bias_on		= 1,
     92	.use_pmdown_time	= 1,
     93	.endianness		= 1,
     94	.non_legacy_dai_naming	= 1,
     95};
     96
     97static int adau7002_probe(struct platform_device *pdev)
     98{
     99	return devm_snd_soc_register_component(&pdev->dev,
    100			&adau7002_component_driver,
    101			&adau7002_dai, 1);
    102}
    103
    104static int adau7002_remove(struct platform_device *pdev)
    105{
    106	return 0;
    107}
    108
    109#ifdef CONFIG_OF
    110static const struct of_device_id adau7002_dt_ids[] = {
    111	{ .compatible = "adi,adau7002", },
    112	{ }
    113};
    114MODULE_DEVICE_TABLE(of, adau7002_dt_ids);
    115#endif
    116
    117#ifdef CONFIG_ACPI
    118static const struct acpi_device_id adau7002_acpi_match[] = {
    119	{ "ADAU7002", 0 },
    120	{},
    121};
    122MODULE_DEVICE_TABLE(acpi, adau7002_acpi_match);
    123#endif
    124
    125static struct platform_driver adau7002_driver = {
    126	.driver = {
    127		.name = "adau7002",
    128		.of_match_table	= of_match_ptr(adau7002_dt_ids),
    129		.acpi_match_table = ACPI_PTR(adau7002_acpi_match),
    130	},
    131	.probe = adau7002_probe,
    132	.remove = adau7002_remove,
    133};
    134module_platform_driver(adau7002_driver);
    135
    136MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
    137MODULE_DESCRIPTION("ADAU7002 Stereo PDM-to-I2S/TDM Converter driver");
    138MODULE_LICENSE("GPL v2");