diff options
Diffstat (limited to 'sound/soc/codecs/rt1015p.c')
| -rw-r--r-- | sound/soc/codecs/rt1015p.c | 154 |
1 files changed, 154 insertions, 0 deletions
diff --git a/sound/soc/codecs/rt1015p.c b/sound/soc/codecs/rt1015p.c new file mode 100644 index 000000000..44e7fe3c3 --- /dev/null +++ b/sound/soc/codecs/rt1015p.c @@ -0,0 +1,154 @@ +// SPDX-License-Identifier: GPL-2.0-only +// +// rt1015p.c -- RT1015P ALSA SoC audio amplifier driver +// +// Copyright 2020 The Linux Foundation. All rights reserved. + +#include <linux/acpi.h> +#include <linux/delay.h> +#include <linux/device.h> +#include <linux/err.h> +#include <linux/gpio/consumer.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/platform_device.h> +#include <sound/pcm.h> +#include <sound/soc.h> +#include <sound/soc-dai.h> +#include <sound/soc-dapm.h> + +struct rt1015p_priv { + struct gpio_desc *sdb; + bool calib_done; +}; + +static int rt1015p_sdb_event(struct snd_soc_dapm_widget *w, + struct snd_kcontrol *kcontrol, int event) +{ + struct snd_soc_component *component = + snd_soc_dapm_to_component(w->dapm); + struct rt1015p_priv *rt1015p = + snd_soc_component_get_drvdata(component); + + if (!rt1015p->sdb) + return 0; + + switch (event) { + case SND_SOC_DAPM_PRE_PMU: + gpiod_set_value_cansleep(rt1015p->sdb, 1); + dev_dbg(component->dev, "set sdb to 1"); + + if (!rt1015p->calib_done) { + msleep(300); + rt1015p->calib_done = true; + } + break; + case SND_SOC_DAPM_POST_PMD: + gpiod_set_value_cansleep(rt1015p->sdb, 0); + dev_dbg(component->dev, "set sdb to 0"); + break; + default: + break; + } + + return 0; +} + +static const struct snd_soc_dapm_widget rt1015p_dapm_widgets[] = { + SND_SOC_DAPM_OUTPUT("Speaker"), + SND_SOC_DAPM_OUT_DRV_E("SDB", SND_SOC_NOPM, 0, 0, NULL, 0, + rt1015p_sdb_event, + SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD), +}; + +static const struct snd_soc_dapm_route rt1015p_dapm_routes[] = { + {"SDB", NULL, "HiFi Playback"}, + {"Speaker", NULL, "SDB"}, +}; + +#ifdef CONFIG_PM +static int rt1015p_suspend(struct snd_soc_component *component) +{ + struct rt1015p_priv *rt1015p = snd_soc_component_get_drvdata(component); + + rt1015p->calib_done = false; + return 0; +} +#else +#define rt1015p_suspend NULL +#endif + +static const struct snd_soc_component_driver rt1015p_component_driver = { + .suspend = rt1015p_suspend, + .dapm_widgets = rt1015p_dapm_widgets, + .num_dapm_widgets = ARRAY_SIZE(rt1015p_dapm_widgets), + .dapm_routes = rt1015p_dapm_routes, + .num_dapm_routes = ARRAY_SIZE(rt1015p_dapm_routes), + .idle_bias_on = 1, + .use_pmdown_time = 1, + .endianness = 1, +}; + +static struct snd_soc_dai_driver rt1015p_dai_driver = { + .name = "HiFi", + .playback = { + .stream_name = "HiFi Playback", + .formats = SNDRV_PCM_FMTBIT_S24 | + SNDRV_PCM_FMTBIT_S32, + .rates = SNDRV_PCM_RATE_48000, + .channels_min = 1, + .channels_max = 2, + }, +}; + +static int rt1015p_platform_probe(struct platform_device *pdev) +{ + struct rt1015p_priv *rt1015p; + + rt1015p = devm_kzalloc(&pdev->dev, sizeof(*rt1015p), GFP_KERNEL); + if (!rt1015p) + return -ENOMEM; + + rt1015p->sdb = devm_gpiod_get_optional(&pdev->dev, + "sdb", GPIOD_OUT_LOW); + if (IS_ERR(rt1015p->sdb)) + return PTR_ERR(rt1015p->sdb); + + dev_set_drvdata(&pdev->dev, rt1015p); + + return devm_snd_soc_register_component(&pdev->dev, + &rt1015p_component_driver, + &rt1015p_dai_driver, 1); +} + +#ifdef CONFIG_OF +static const struct of_device_id rt1015p_device_id[] = { + { .compatible = "realtek,rt1015p" }, + { .compatible = "realtek,rt1019p" }, + {} +}; +MODULE_DEVICE_TABLE(of, rt1015p_device_id); +#endif + +#ifdef CONFIG_ACPI +static const struct acpi_device_id rt1015p_acpi_match[] = { + { "RTL1015", 0}, + { "RTL1019", 0}, + { }, +}; +MODULE_DEVICE_TABLE(acpi, rt1015p_acpi_match); +#endif + +static struct platform_driver rt1015p_platform_driver = { + .driver = { + .name = "rt1015p", + .of_match_table = of_match_ptr(rt1015p_device_id), + .acpi_match_table = ACPI_PTR(rt1015p_acpi_match), + }, + .probe = rt1015p_platform_probe, +}; +module_platform_driver(rt1015p_platform_driver); + +MODULE_DESCRIPTION("ASoC RT1015P driver"); +MODULE_LICENSE("GPL v2"); |