diff options
Diffstat (limited to 'sound/soc/codecs/rt9123p.c')
| -rw-r--r-- | sound/soc/codecs/rt9123p.c | 171 |
1 files changed, 171 insertions, 0 deletions
diff --git a/sound/soc/codecs/rt9123p.c b/sound/soc/codecs/rt9123p.c new file mode 100644 index 000000000000..d509659e735b --- /dev/null +++ b/sound/soc/codecs/rt9123p.c @@ -0,0 +1,171 @@ +// SPDX-License-Identifier: GPL-2.0-only +// +// rt9123p.c -- RT9123 (HW Mode) ALSA SoC Codec driver +// +// Author: ChiYuan Huang <cy_huang@richtek.com> + +#include <linux/acpi.h> +#include <linux/delay.h> +#include <linux/err.h> +#include <linux/gpio/consumer.h> +#include <linux/kernel.h> +#include <linux/mod_devicetable.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/platform_device.h> +#include <linux/property.h> +#include <sound/pcm.h> +#include <sound/soc.h> +#include <sound/soc-dai.h> +#include <sound/soc-dapm.h> + +struct rt9123p_priv { + struct gpio_desc *enable; + unsigned int enable_delay; + int enable_switch; +}; + +static int rt9123p_daiops_trigger(struct snd_pcm_substream *substream, int cmd, + struct snd_soc_dai *dai) +{ + struct snd_soc_component *comp = dai->component; + struct rt9123p_priv *rt9123p = snd_soc_component_get_drvdata(comp); + + if (!rt9123p->enable) + return 0; + + switch (cmd) { + case SNDRV_PCM_TRIGGER_START: + case SNDRV_PCM_TRIGGER_RESUME: + case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: + mdelay(rt9123p->enable_delay); + if (rt9123p->enable_switch) { + gpiod_set_value(rt9123p->enable, 1); + dev_dbg(comp->dev, "set enable to 1"); + } + break; + case SNDRV_PCM_TRIGGER_STOP: + case SNDRV_PCM_TRIGGER_SUSPEND: + case SNDRV_PCM_TRIGGER_PAUSE_PUSH: + gpiod_set_value(rt9123p->enable, 0); + dev_dbg(comp->dev, "set enable to 0"); + break; + default: + break; + } + + return 0; +} + +static int rt9123p_enable_event(struct snd_soc_dapm_widget *w, struct snd_kcontrol *kcontrol, + int event) +{ + struct snd_soc_component *comp = snd_soc_dapm_to_component(w->dapm); + struct rt9123p_priv *rt9123p = snd_soc_component_get_drvdata(comp); + + if (event & SND_SOC_DAPM_POST_PMU) + rt9123p->enable_switch = 1; + else if (event & SND_SOC_DAPM_POST_PMD) + rt9123p->enable_switch = 0; + + return 0; +} + +static const struct snd_soc_dapm_widget rt9123p_dapm_widgets[] = { + SND_SOC_DAPM_OUTPUT("SPK"), + SND_SOC_DAPM_OUT_DRV_E("Amp Drv", SND_SOC_NOPM, 0, 0, NULL, 0, rt9123p_enable_event, + SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_POST_PMD), +}; + +static const struct snd_soc_dapm_route rt9123p_dapm_routes[] = { + {"Amp Drv", NULL, "HiFi Playback"}, + {"SPK", NULL, "Amp Drv"}, +}; + +static const struct snd_soc_component_driver rt9123p_comp_driver = { + .dapm_widgets = rt9123p_dapm_widgets, + .num_dapm_widgets = ARRAY_SIZE(rt9123p_dapm_widgets), + .dapm_routes = rt9123p_dapm_routes, + .num_dapm_routes = ARRAY_SIZE(rt9123p_dapm_routes), + .idle_bias_on = 1, + .use_pmdown_time = 1, + .endianness = 1, +}; + +static const struct snd_soc_dai_ops rt9123p_dai_ops = { + .trigger = rt9123p_daiops_trigger, +}; + +static struct snd_soc_dai_driver rt9123p_dai_driver = { + .name = "HiFi", + .playback = { + .stream_name = "HiFi Playback", + .formats = SNDRV_PCM_FMTBIT_S16 | SNDRV_PCM_FMTBIT_S24 | + SNDRV_PCM_FMTBIT_S32, + .rates = SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000 | + SNDRV_PCM_RATE_22050 | SNDRV_PCM_RATE_24000 | + SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | + SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 | + SNDRV_PCM_RATE_96000, + .rate_min = 8000, + .rate_max = 96000, + .channels_min = 1, + .channels_max = 2, + }, + .ops = &rt9123p_dai_ops, +}; + +static int rt9123p_platform_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct rt9123p_priv *rt9123p; + int ret; + + rt9123p = devm_kzalloc(dev, sizeof(*rt9123p), GFP_KERNEL); + if (!rt9123p) + return -ENOMEM; + + rt9123p->enable = devm_gpiod_get_optional(dev, "enable", GPIOD_OUT_LOW); + if (IS_ERR(rt9123p->enable)) + return PTR_ERR(rt9123p->enable); + + ret = device_property_read_u32(dev, "enable-delay-ms", &rt9123p->enable_delay); + if (ret) { + rt9123p->enable_delay = 0; + dev_dbg(dev, "no optional property 'enable-delay-ms' found, default: no delay\n"); + } + + platform_set_drvdata(pdev, rt9123p); + + return devm_snd_soc_register_component(dev, &rt9123p_comp_driver, &rt9123p_dai_driver, 1); +} + +#ifdef CONFIG_OF +static const struct of_device_id rt9123p_device_id[] = { + { .compatible = "richtek,rt9123p" }, + {} +}; +MODULE_DEVICE_TABLE(of, rt9123p_device_id); +#endif + +#ifdef CONFIG_ACPI +static const struct acpi_device_id rt9123p_acpi_match[] = { + { "RT9123P", 0 }, + {} +}; +MODULE_DEVICE_TABLE(acpi, rt9123p_acpi_match); +#endif + +static struct platform_driver rt9123p_platform_driver = { + .driver = { + .name = "rt9123p", + .of_match_table = of_match_ptr(rt9123p_device_id), + .acpi_match_table = ACPI_PTR(rt9123p_acpi_match), + }, + .probe = rt9123p_platform_probe, +}; +module_platform_driver(rt9123p_platform_driver); + +MODULE_AUTHOR("ChiYuan Huang <cy_huang@richtek.com>"); +MODULE_DESCRIPTION("ASoC rt9123p Driver"); +MODULE_LICENSE("GPL"); |