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165 lines
4.1 KiB
165 lines
4.1 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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// |
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// nau8315.c -- NAU8315 ALSA SoC Audio Amplifier Driver |
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// |
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// Copyright 2020 Nuvoton Technology Crop. |
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// |
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// Author: David Lin <[email protected]> |
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// |
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// Based on MAX98357A.c |
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#include <linux/acpi.h> |
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#include <linux/device.h> |
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#include <linux/err.h> |
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#include <linux/gpio.h> |
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#include <linux/gpio/consumer.h> |
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#include <linux/kernel.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/pcm.h> |
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#include <sound/soc.h> |
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#include <sound/soc-dai.h> |
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#include <sound/soc-dapm.h> |
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struct nau8315_priv { |
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struct gpio_desc *enable; |
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int enpin_switch; |
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}; |
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static int nau8315_daiops_trigger(struct snd_pcm_substream *substream, |
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int cmd, struct snd_soc_dai *dai) |
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{ |
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struct snd_soc_component *component = dai->component; |
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struct nau8315_priv *nau8315 = |
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snd_soc_component_get_drvdata(component); |
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if (!nau8315->enable) |
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return 0; |
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switch (cmd) { |
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case SNDRV_PCM_TRIGGER_START: |
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case SNDRV_PCM_TRIGGER_RESUME: |
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case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: |
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if (nau8315->enpin_switch) { |
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gpiod_set_value(nau8315->enable, 1); |
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dev_dbg(component->dev, "set enable to 1"); |
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} |
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break; |
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case SNDRV_PCM_TRIGGER_STOP: |
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case SNDRV_PCM_TRIGGER_SUSPEND: |
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case SNDRV_PCM_TRIGGER_PAUSE_PUSH: |
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gpiod_set_value(nau8315->enable, 0); |
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dev_dbg(component->dev, "set enable to 0"); |
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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 nau8315_enpin_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 nau8315_priv *nau8315 = |
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snd_soc_component_get_drvdata(component); |
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if (event & SND_SOC_DAPM_PRE_PMU) |
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nau8315->enpin_switch = 1; |
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else if (event & SND_SOC_DAPM_POST_PMD) |
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nau8315->enpin_switch = 0; |
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return 0; |
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} |
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static const struct snd_soc_dapm_widget nau8315_dapm_widgets[] = { |
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SND_SOC_DAPM_OUTPUT("Speaker"), |
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SND_SOC_DAPM_OUT_DRV_E("EN_Pin", SND_SOC_NOPM, 0, 0, NULL, 0, |
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nau8315_enpin_event, |
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SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD), |
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}; |
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static const struct snd_soc_dapm_route nau8315_dapm_routes[] = { |
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{"EN_Pin", NULL, "HiFi Playback"}, |
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{"Speaker", NULL, "EN_Pin"}, |
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}; |
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static const struct snd_soc_component_driver nau8315_component_driver = { |
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.dapm_widgets = nau8315_dapm_widgets, |
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.num_dapm_widgets = ARRAY_SIZE(nau8315_dapm_widgets), |
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.dapm_routes = nau8315_dapm_routes, |
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.num_dapm_routes = ARRAY_SIZE(nau8315_dapm_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 const struct snd_soc_dai_ops nau8315_dai_ops = { |
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.trigger = nau8315_daiops_trigger, |
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}; |
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#define NAU8315_RATES SNDRV_PCM_RATE_8000_96000 |
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#define NAU8315_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_3LE) |
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static struct snd_soc_dai_driver nau8315_dai_driver = { |
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.name = "nau8315-hifi", |
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.playback = { |
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.stream_name = "HiFi Playback", |
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.formats = NAU8315_FORMATS, |
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.rates = NAU8315_RATES, |
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.channels_min = 1, |
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.channels_max = 2, |
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}, |
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.ops = &nau8315_dai_ops, |
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}; |
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static int nau8315_platform_probe(struct platform_device *pdev) |
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{ |
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struct nau8315_priv *nau8315; |
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nau8315 = devm_kzalloc(&pdev->dev, sizeof(*nau8315), GFP_KERNEL); |
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if (!nau8315) |
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return -ENOMEM; |
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nau8315->enable = devm_gpiod_get_optional(&pdev->dev, |
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"enable", GPIOD_OUT_LOW); |
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if (IS_ERR(nau8315->enable)) |
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return PTR_ERR(nau8315->enable); |
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dev_set_drvdata(&pdev->dev, nau8315); |
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return devm_snd_soc_register_component(&pdev->dev, |
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&nau8315_component_driver, |
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&nau8315_dai_driver, 1); |
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} |
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#ifdef CONFIG_OF |
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static const struct of_device_id nau8315_device_id[] = { |
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{ .compatible = "nuvoton,nau8315" }, |
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{} |
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}; |
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MODULE_DEVICE_TABLE(of, nau8315_device_id); |
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#endif |
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#ifdef CONFIG_ACPI |
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static const struct acpi_device_id nau8315_acpi_match[] = { |
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{ "NVTN2010", 0 }, |
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{}, |
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}; |
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MODULE_DEVICE_TABLE(acpi, nau8315_acpi_match); |
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#endif |
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static struct platform_driver nau8315_platform_driver = { |
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.driver = { |
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.name = "nau8315", |
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.of_match_table = of_match_ptr(nau8315_device_id), |
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.acpi_match_table = ACPI_PTR(nau8315_acpi_match), |
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}, |
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.probe = nau8315_platform_probe, |
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}; |
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module_platform_driver(nau8315_platform_driver); |
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MODULE_DESCRIPTION("ASoC NAU8315 Mono Class-D Amplifier Driver"); |
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MODULE_AUTHOR("David Lin <[email protected]>"); |
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MODULE_LICENSE("GPL v2");
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