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209 lines
5.5 KiB
209 lines
5.5 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* ALSA SoC driver for |
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* Asahi Kasei AK5386 Single-ended 24-Bit 192kHz delta-sigma ADC |
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* |
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* (c) 2013 Daniel Mack <[email protected]> |
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*/ |
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#include <linux/module.h> |
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#include <linux/slab.h> |
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#include <linux/of.h> |
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#include <linux/of_gpio.h> |
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#include <linux/of_device.h> |
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#include <linux/regulator/consumer.h> |
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#include <sound/soc.h> |
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#include <sound/pcm.h> |
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#include <sound/initval.h> |
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static const char * const supply_names[] = { |
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"va", "vd" |
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}; |
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struct ak5386_priv { |
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int reset_gpio; |
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struct regulator_bulk_data supplies[ARRAY_SIZE(supply_names)]; |
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}; |
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static const struct snd_soc_dapm_widget ak5386_dapm_widgets[] = { |
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SND_SOC_DAPM_INPUT("AINL"), |
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SND_SOC_DAPM_INPUT("AINR"), |
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}; |
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static const struct snd_soc_dapm_route ak5386_dapm_routes[] = { |
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{ "Capture", NULL, "AINL" }, |
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{ "Capture", NULL, "AINR" }, |
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}; |
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static int ak5386_soc_probe(struct snd_soc_component *component) |
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{ |
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struct ak5386_priv *priv = snd_soc_component_get_drvdata(component); |
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return regulator_bulk_enable(ARRAY_SIZE(priv->supplies), priv->supplies); |
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} |
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static void ak5386_soc_remove(struct snd_soc_component *component) |
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{ |
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struct ak5386_priv *priv = snd_soc_component_get_drvdata(component); |
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regulator_bulk_disable(ARRAY_SIZE(priv->supplies), priv->supplies); |
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} |
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#ifdef CONFIG_PM |
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static int ak5386_soc_suspend(struct snd_soc_component *component) |
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{ |
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struct ak5386_priv *priv = snd_soc_component_get_drvdata(component); |
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regulator_bulk_disable(ARRAY_SIZE(priv->supplies), priv->supplies); |
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return 0; |
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} |
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static int ak5386_soc_resume(struct snd_soc_component *component) |
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{ |
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struct ak5386_priv *priv = snd_soc_component_get_drvdata(component); |
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return regulator_bulk_enable(ARRAY_SIZE(priv->supplies), priv->supplies); |
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} |
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#else |
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#define ak5386_soc_suspend NULL |
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#define ak5386_soc_resume NULL |
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#endif /* CONFIG_PM */ |
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static const struct snd_soc_component_driver soc_component_ak5386 = { |
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.probe = ak5386_soc_probe, |
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.remove = ak5386_soc_remove, |
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.suspend = ak5386_soc_suspend, |
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.resume = ak5386_soc_resume, |
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.dapm_widgets = ak5386_dapm_widgets, |
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.num_dapm_widgets = ARRAY_SIZE(ak5386_dapm_widgets), |
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.dapm_routes = ak5386_dapm_routes, |
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.num_dapm_routes = ARRAY_SIZE(ak5386_dapm_routes), |
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.idle_bias_on = 1, |
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.use_pmdown_time = 1, |
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.endianness = 1, |
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.non_legacy_dai_naming = 1, |
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}; |
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static int ak5386_set_dai_fmt(struct snd_soc_dai *codec_dai, |
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unsigned int format) |
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{ |
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struct snd_soc_component *component = codec_dai->component; |
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format &= SND_SOC_DAIFMT_FORMAT_MASK; |
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if (format != SND_SOC_DAIFMT_LEFT_J && |
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format != SND_SOC_DAIFMT_I2S) { |
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dev_err(component->dev, "Invalid DAI format\n"); |
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return -EINVAL; |
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} |
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return 0; |
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} |
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static int ak5386_hw_params(struct snd_pcm_substream *substream, |
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struct snd_pcm_hw_params *params, |
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struct snd_soc_dai *dai) |
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{ |
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struct snd_soc_component *component = dai->component; |
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struct ak5386_priv *priv = snd_soc_component_get_drvdata(component); |
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/* |
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* From the datasheet: |
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* |
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* All external clocks (MCLK, SCLK and LRCK) must be present unless |
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* PDN pin = “L”. If these clocks are not provided, the AK5386 may |
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* draw excess current due to its use of internal dynamically |
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* refreshed logic. If the external clocks are not present, place |
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* the AK5386 in power-down mode (PDN pin = “L”). |
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*/ |
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if (gpio_is_valid(priv->reset_gpio)) |
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gpio_set_value(priv->reset_gpio, 1); |
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return 0; |
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} |
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static int ak5386_hw_free(struct snd_pcm_substream *substream, |
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struct snd_soc_dai *dai) |
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{ |
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struct snd_soc_component *component = dai->component; |
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struct ak5386_priv *priv = snd_soc_component_get_drvdata(component); |
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if (gpio_is_valid(priv->reset_gpio)) |
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gpio_set_value(priv->reset_gpio, 0); |
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return 0; |
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} |
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static const struct snd_soc_dai_ops ak5386_dai_ops = { |
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.set_fmt = ak5386_set_dai_fmt, |
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.hw_params = ak5386_hw_params, |
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.hw_free = ak5386_hw_free, |
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}; |
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static struct snd_soc_dai_driver ak5386_dai = { |
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.name = "ak5386-hifi", |
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.capture = { |
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.stream_name = "Capture", |
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.channels_min = 1, |
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.channels_max = 2, |
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.rates = SNDRV_PCM_RATE_8000_192000, |
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.formats = SNDRV_PCM_FMTBIT_S8 | |
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SNDRV_PCM_FMTBIT_S16_LE | |
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SNDRV_PCM_FMTBIT_S24_LE | |
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SNDRV_PCM_FMTBIT_S24_3LE, |
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}, |
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.ops = &ak5386_dai_ops, |
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}; |
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#ifdef CONFIG_OF |
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static const struct of_device_id ak5386_dt_ids[] = { |
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{ .compatible = "asahi-kasei,ak5386", }, |
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{ } |
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}; |
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MODULE_DEVICE_TABLE(of, ak5386_dt_ids); |
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#endif |
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static int ak5386_probe(struct platform_device *pdev) |
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{ |
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struct device *dev = &pdev->dev; |
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struct ak5386_priv *priv; |
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int ret, i; |
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priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); |
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if (!priv) |
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return -ENOMEM; |
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priv->reset_gpio = -EINVAL; |
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dev_set_drvdata(dev, priv); |
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for (i = 0; i < ARRAY_SIZE(supply_names); i++) |
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priv->supplies[i].supply = supply_names[i]; |
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ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(priv->supplies), |
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priv->supplies); |
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if (ret < 0) |
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return ret; |
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if (of_match_device(of_match_ptr(ak5386_dt_ids), dev)) |
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priv->reset_gpio = of_get_named_gpio(dev->of_node, |
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"reset-gpio", 0); |
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if (gpio_is_valid(priv->reset_gpio)) |
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if (devm_gpio_request_one(dev, priv->reset_gpio, |
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GPIOF_OUT_INIT_LOW, |
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"AK5386 Reset")) |
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priv->reset_gpio = -EINVAL; |
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return devm_snd_soc_register_component(dev, &soc_component_ak5386, |
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&ak5386_dai, 1); |
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} |
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static struct platform_driver ak5386_driver = { |
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.probe = ak5386_probe, |
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.driver = { |
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.name = "ak5386", |
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.of_match_table = of_match_ptr(ak5386_dt_ids), |
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}, |
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}; |
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module_platform_driver(ak5386_driver); |
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MODULE_DESCRIPTION("ASoC driver for AK5386 ADC"); |
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MODULE_AUTHOR("Daniel Mack <[email protected]>"); |
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MODULE_LICENSE("GPL");
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