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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rt1015p.c (3782B)

      1// SPDX-License-Identifier: GPL-2.0-only
      2//
      3// rt1015p.c  --  RT1015P ALSA SoC audio amplifier driver
      4//
      5// Copyright 2020 The Linux Foundation. All rights reserved.
      6
      7#include <linux/acpi.h>
      8#include <linux/delay.h>
      9#include <linux/device.h>
     10#include <linux/err.h>
     11#include <linux/gpio.h>
     12#include <linux/gpio/consumer.h>
     13#include <linux/kernel.h>
     14#include <linux/module.h>
     15#include <linux/of.h>
     16#include <linux/platform_device.h>
     17#include <sound/pcm.h>
     18#include <sound/soc.h>
     19#include <sound/soc-dai.h>
     20#include <sound/soc-dapm.h>
     21
     22struct rt1015p_priv {
     23	struct gpio_desc *sdb;
     24	bool calib_done;
     25};
     26
     27static int rt1015p_sdb_event(struct snd_soc_dapm_widget *w,
     28		struct snd_kcontrol *kcontrol, int event)
     29{
     30	struct snd_soc_component *component =
     31		snd_soc_dapm_to_component(w->dapm);
     32	struct rt1015p_priv *rt1015p =
     33		snd_soc_component_get_drvdata(component);
     34
     35	if (!rt1015p->sdb)
     36		return 0;
     37
     38	switch (event) {
     39	case SND_SOC_DAPM_PRE_PMU:
     40		gpiod_set_value_cansleep(rt1015p->sdb, 1);
     41		dev_dbg(component->dev, "set sdb to 1");
     42
     43		if (!rt1015p->calib_done) {
     44			msleep(300);
     45			rt1015p->calib_done = true;
     46		}
     47		break;
     48	case SND_SOC_DAPM_POST_PMD:
     49		gpiod_set_value_cansleep(rt1015p->sdb, 0);
     50		dev_dbg(component->dev, "set sdb to 0");
     51		break;
     52	default:
     53		break;
     54	}
     55
     56	return 0;
     57}
     58
     59static const struct snd_soc_dapm_widget rt1015p_dapm_widgets[] = {
     60	SND_SOC_DAPM_OUTPUT("Speaker"),
     61	SND_SOC_DAPM_OUT_DRV_E("SDB", SND_SOC_NOPM, 0, 0, NULL, 0,
     62			rt1015p_sdb_event,
     63			SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD),
     64};
     65
     66static const struct snd_soc_dapm_route rt1015p_dapm_routes[] = {
     67	{"SDB", NULL, "HiFi Playback"},
     68	{"Speaker", NULL, "SDB"},
     69};
     70
     71#ifdef CONFIG_PM
     72static int rt1015p_suspend(struct snd_soc_component *component)
     73{
     74	struct rt1015p_priv *rt1015p = snd_soc_component_get_drvdata(component);
     75
     76	rt1015p->calib_done = false;
     77	return 0;
     78}
     79#else
     80#define rt1015p_suspend NULL
     81#endif
     82
     83static const struct snd_soc_component_driver rt1015p_component_driver = {
     84	.suspend		= rt1015p_suspend,
     85	.dapm_widgets		= rt1015p_dapm_widgets,
     86	.num_dapm_widgets	= ARRAY_SIZE(rt1015p_dapm_widgets),
     87	.dapm_routes		= rt1015p_dapm_routes,
     88	.num_dapm_routes	= ARRAY_SIZE(rt1015p_dapm_routes),
     89	.idle_bias_on		= 1,
     90	.use_pmdown_time	= 1,
     91	.endianness		= 1,
     92	.non_legacy_dai_naming	= 1,
     93};
     94
     95static struct snd_soc_dai_driver rt1015p_dai_driver = {
     96	.name = "HiFi",
     97	.playback = {
     98		.stream_name	= "HiFi Playback",
     99		.formats	= SNDRV_PCM_FMTBIT_S24 |
    100					SNDRV_PCM_FMTBIT_S32,
    101		.rates		= SNDRV_PCM_RATE_48000,
    102		.channels_min	= 1,
    103		.channels_max	= 2,
    104	},
    105};
    106
    107static int rt1015p_platform_probe(struct platform_device *pdev)
    108{
    109	struct rt1015p_priv *rt1015p;
    110
    111	rt1015p = devm_kzalloc(&pdev->dev, sizeof(*rt1015p), GFP_KERNEL);
    112	if (!rt1015p)
    113		return -ENOMEM;
    114
    115	rt1015p->sdb = devm_gpiod_get_optional(&pdev->dev,
    116				"sdb", GPIOD_OUT_LOW);
    117	if (IS_ERR(rt1015p->sdb))
    118		return PTR_ERR(rt1015p->sdb);
    119
    120	dev_set_drvdata(&pdev->dev, rt1015p);
    121
    122	return devm_snd_soc_register_component(&pdev->dev,
    123			&rt1015p_component_driver,
    124			&rt1015p_dai_driver, 1);
    125}
    126
    127#ifdef CONFIG_OF
    128static const struct of_device_id rt1015p_device_id[] = {
    129	{ .compatible = "realtek,rt1015p" },
    130	{ .compatible = "realtek,rt1019p" },
    131	{}
    132};
    133MODULE_DEVICE_TABLE(of, rt1015p_device_id);
    134#endif
    135
    136#ifdef CONFIG_ACPI
    137static const struct acpi_device_id rt1015p_acpi_match[] = {
    138	{ "RTL1015", 0},
    139	{ "RTL1019", 0},
    140	{ },
    141};
    142MODULE_DEVICE_TABLE(acpi, rt1015p_acpi_match);
    143#endif
    144
    145static struct platform_driver rt1015p_platform_driver = {
    146	.driver = {
    147		.name = "rt1015p",
    148		.of_match_table = of_match_ptr(rt1015p_device_id),
    149		.acpi_match_table = ACPI_PTR(rt1015p_acpi_match),
    150	},
    151	.probe = rt1015p_platform_probe,
    152};
    153module_platform_driver(rt1015p_platform_driver);
    154
    155MODULE_DESCRIPTION("ASoC RT1015P driver");
    156MODULE_LICENSE("GPL v2");