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