diff options
Diffstat (limited to 'sound/soc/codecs/rt1015p.c')
| -rw-r--r-- | sound/soc/codecs/rt1015p.c | 148 |
1 files changed, 148 insertions, 0 deletions
diff --git a/sound/soc/codecs/rt1015p.c b/sound/soc/codecs/rt1015p.c new file mode 100644 index 000000000..59bb60682 --- /dev/null +++ b/sound/soc/codecs/rt1015p.c @@ -0,0 +1,148 @@ +// 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/device.h> +#include <linux/err.h> +#include <linux/gpio.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; + int sdb_switch; +}; + +static int rt1015p_daiops_trigger(struct snd_pcm_substream *substream, + int cmd, struct snd_soc_dai *dai) +{ + struct snd_soc_component *component = dai->component; + struct rt1015p_priv *rt1015p = + snd_soc_component_get_drvdata(component); + + if (!rt1015p->sdb) + return 0; + + switch (cmd) { + case SNDRV_PCM_TRIGGER_START: + case SNDRV_PCM_TRIGGER_RESUME: + case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: + if (rt1015p->sdb_switch) { + gpiod_set_value(rt1015p->sdb, 1); + dev_dbg(component->dev, "set sdb to 1"); + } + break; + case SNDRV_PCM_TRIGGER_STOP: + case SNDRV_PCM_TRIGGER_SUSPEND: + case SNDRV_PCM_TRIGGER_PAUSE_PUSH: + gpiod_set_value(rt1015p->sdb, 0); + dev_dbg(component->dev, "set sdb to 0"); + break; + } + + return 0; +} + +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 (event & SND_SOC_DAPM_POST_PMU) + rt1015p->sdb_switch = 1; + else if (event & SND_SOC_DAPM_POST_PMD) + rt1015p->sdb_switch = 0; + + 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_POST_PMU | SND_SOC_DAPM_POST_PMD), +}; + +static const struct snd_soc_dapm_route rt1015p_dapm_routes[] = { + {"SDB", NULL, "HiFi Playback"}, + {"Speaker", NULL, "SDB"}, +}; + +static const struct snd_soc_component_driver rt1015p_component_driver = { + .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, + .non_legacy_dai_naming = 1, +}; + +static const struct snd_soc_dai_ops rt1015p_dai_ops = { + .trigger = rt1015p_daiops_trigger, +}; + +static struct snd_soc_dai_driver rt1015p_dai_driver = { + .name = "HiFi", + .playback = { + .stream_name = "HiFi Playback", + .formats = SNDRV_PCM_FMTBIT_S24, + .rates = SNDRV_PCM_RATE_48000, + .channels_min = 1, + .channels_max = 2, + }, + .ops = &rt1015p_dai_ops, +}; + +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" }, + {} +}; +MODULE_DEVICE_TABLE(of, rt1015p_device_id); +#endif + +static struct platform_driver rt1015p_platform_driver = { + .driver = { + .name = "rt1015p", + .of_match_table = of_match_ptr(rt1015p_device_id), + }, + .probe = rt1015p_platform_probe, +}; +module_platform_driver(rt1015p_platform_driver); + +MODULE_DESCRIPTION("ASoC RT1015P driver"); +MODULE_LICENSE("GPL v2"); |