// SPDX-License-Identifier: GPL-2.0-or-later /* * PCM1754 DAC ASoC codec driver * * Copyright (c) 2022 Alvin Šipraga * Copyright (c) 2025 Stefan Kerkmann */ #include #include #include #include #include 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 "); MODULE_AUTHOR("Stefan Kerkmann "); MODULE_LICENSE("GPL");