diff options
Diffstat (limited to 'sound/soc/codecs/pcm1754.c')
| -rw-r--r-- | sound/soc/codecs/pcm1754.c | 185 |
1 files changed, 185 insertions, 0 deletions
diff --git a/sound/soc/codecs/pcm1754.c b/sound/soc/codecs/pcm1754.c new file mode 100644 index 000000000000..b68a528000be --- /dev/null +++ b/sound/soc/codecs/pcm1754.c @@ -0,0 +1,185 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * PCM1754 DAC ASoC codec driver + * + * Copyright (c) 2022 Alvin Šipraga <alsi@bang-olufsen.dk> + * Copyright (c) 2025 Stefan Kerkmann <s.kerkmann@pengutronix.de> + */ + +#include <linux/gpio/consumer.h> +#include <linux/module.h> +#include <linux/regulator/consumer.h> + +#include <sound/pcm_params.h> +#include <sound/soc.h> + +struct pcm1754_priv { + unsigned int format; + struct gpio_desc *gpiod_mute; + struct gpio_desc *gpiod_format; +}; + +static int pcm1754_set_dai_fmt(struct snd_soc_dai *codec_dai, + unsigned int format) +{ + struct snd_soc_component *component = codec_dai->component; + struct pcm1754_priv *priv = snd_soc_component_get_drvdata(component); + + priv->format = format; + + return 0; +} + +static int pcm1754_hw_params(struct snd_pcm_substream *substream, + struct snd_pcm_hw_params *params, + struct snd_soc_dai *codec_dai) +{ + struct snd_soc_component *component = codec_dai->component; + struct pcm1754_priv *priv = snd_soc_component_get_drvdata(component); + int format; + + switch (priv->format & SND_SOC_DAIFMT_FORMAT_MASK) { + case SND_SOC_DAIFMT_RIGHT_J: + switch (params_width(params)) { + case 16: + format = 1; + break; + default: + return -EINVAL; + } + break; + case SND_SOC_DAIFMT_I2S: + switch (params_width(params)) { + case 16: + fallthrough; + case 24: + format = 0; + break; + default: + return -EINVAL; + } + break; + default: + dev_err(component->dev, "Invalid DAI format\n"); + return -EINVAL; + } + + gpiod_set_value_cansleep(priv->gpiod_format, format); + + return 0; +} + +static int pcm1754_mute_stream(struct snd_soc_dai *dai, int mute, int stream) +{ + struct pcm1754_priv *priv = snd_soc_component_get_drvdata(dai->component); + + gpiod_set_value_cansleep(priv->gpiod_mute, mute); + + return 0; +} + +static const struct snd_soc_dai_ops pcm1754_dai_ops = { + .set_fmt = pcm1754_set_dai_fmt, + .hw_params = pcm1754_hw_params, + .mute_stream = pcm1754_mute_stream, +}; + +static const struct snd_soc_dai_driver pcm1754_dai = { + .name = "pcm1754", + .playback = { + .stream_name = "Playback", + .channels_min = 2, + .channels_max = 2, + .rates = SNDRV_PCM_RATE_CONTINUOUS, + .rate_min = 5000, + .rate_max = 200000, + .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE + }, + .ops = &pcm1754_dai_ops, +}; + +static const struct snd_soc_dapm_widget pcm1754_dapm_widgets[] = { + SND_SOC_DAPM_REGULATOR_SUPPLY("VCC", 0, 0), + + SND_SOC_DAPM_DAC("DAC1", "Channel 1 Playback", SND_SOC_NOPM, 0, 0), + SND_SOC_DAPM_DAC("DAC2", "Channel 2 Playback", SND_SOC_NOPM, 0, 0), + + SND_SOC_DAPM_OUTPUT("VOUTL"), + SND_SOC_DAPM_OUTPUT("VOUTR"), +}; + +static const struct snd_soc_dapm_route pcm1754_dapm_routes[] = { + { "DAC1", NULL, "Playback" }, + { "DAC2", NULL, "Playback" }, + + { "DAC1", NULL, "VCC" }, + { "DAC2", NULL, "VCC" }, + + { "VOUTL", NULL, "DAC1" }, + { "VOUTR", NULL, "DAC2" }, +}; + +static const struct snd_soc_component_driver soc_component_dev_pcm1754 = { + .dapm_widgets = pcm1754_dapm_widgets, + .num_dapm_widgets = ARRAY_SIZE(pcm1754_dapm_widgets), + .dapm_routes = pcm1754_dapm_routes, + .num_dapm_routes = ARRAY_SIZE(pcm1754_dapm_routes), +}; + +static int pcm1754_probe(struct platform_device *pdev) +{ + struct pcm1754_priv *priv; + struct device *dev = &pdev->dev; + struct snd_soc_dai_driver *dai_drv; + int ret; + + dai_drv = devm_kmemdup(dev, &pcm1754_dai, sizeof(*dai_drv), GFP_KERNEL); + if (!dai_drv) + return -ENOMEM; + + priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + + priv->gpiod_mute = devm_gpiod_get_optional(dev, "mute", GPIOD_OUT_HIGH); + if (IS_ERR(priv->gpiod_mute)) + return dev_err_probe(dev, PTR_ERR(priv->gpiod_mute), + "failed to get mute gpio"); + + priv->gpiod_format = devm_gpiod_get_optional(dev, "format", GPIOD_OUT_LOW); + if (IS_ERR(priv->gpiod_format)) + return dev_err_probe(dev, PTR_ERR(priv->gpiod_format), + "failed to get format gpio"); + + dev_set_drvdata(dev, priv); + + ret = devm_snd_soc_register_component( + &pdev->dev, &soc_component_dev_pcm1754, dai_drv, 1); + if (ret) + return dev_err_probe(dev, ret, "failed to register"); + + return 0; +} + +#ifdef CONFIG_OF +static const struct of_device_id pcm1754_of_match[] = { + { .compatible = "ti,pcm1754" }, + { } +}; +MODULE_DEVICE_TABLE(of, pcm1754_of_match); +#endif + +static struct platform_driver pcm1754_codec_driver = { + .driver = { + .name = "pcm1754-codec", + .of_match_table = of_match_ptr(pcm1754_of_match), + }, + .probe = pcm1754_probe, +}; + +module_platform_driver(pcm1754_codec_driver); + +MODULE_DESCRIPTION("ASoC PCM1754 driver"); +MODULE_AUTHOR("Alvin Šipraga <alsi@bang-olufsen.dk>"); +MODULE_AUTHOR("Stefan Kerkmann <s.kerkmann@pengutronix.de>"); +MODULE_LICENSE("GPL"); |