[deliverable/linux.git] / sound / soc / codecs / ak5386.c

/*
 * ALSA SoC driver for
 *    Asahi Kasei AK5386 Single-ended 24-Bit 192kHz delta-sigma ADC
 *
 * (c) 2013 Daniel Mack <zonque@gmail.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#include <linux/module.h>
#include <linux/slab.h>
#include <linux/of.h>
#include <linux/of_gpio.h>
#include <linux/of_device.h>
#include <linux/regulator/consumer.h>
#include <sound/soc.h>
#include <sound/pcm.h>
#include <sound/initval.h>

static const char * const supply_names[] = {
	"va", "vd"
};

struct ak5386_priv {
	int reset_gpio;
	struct regulator_bulk_data supplies[ARRAY_SIZE(supply_names)];
};

static const struct snd_soc_dapm_widget ak5386_dapm_widgets[] = {
SND_SOC_DAPM_INPUT("AINL"),
SND_SOC_DAPM_INPUT("AINR"),
};

static const struct snd_soc_dapm_route ak5386_dapm_routes[] = {
	{ "Capture", NULL, "AINL" },
	{ "Capture", NULL, "AINR" },
};

static int ak5386_soc_probe(struct snd_soc_codec *codec)
{
	struct ak5386_priv *priv = snd_soc_codec_get_drvdata(codec);
	return regulator_bulk_enable(ARRAY_SIZE(priv->supplies), priv->supplies);
}

static int ak5386_soc_remove(struct snd_soc_codec *codec)
{
	struct ak5386_priv *priv = snd_soc_codec_get_drvdata(codec);
	regulator_bulk_disable(ARRAY_SIZE(priv->supplies), priv->supplies);
	return 0;
}

#ifdef CONFIG_PM
static int ak5386_soc_suspend(struct snd_soc_codec *codec)
{
	struct ak5386_priv *priv = snd_soc_codec_get_drvdata(codec);
	regulator_bulk_disable(ARRAY_SIZE(priv->supplies), priv->supplies);
	return 0;
}

static int ak5386_soc_resume(struct snd_soc_codec *codec)
{
	struct ak5386_priv *priv = snd_soc_codec_get_drvdata(codec);
	return regulator_bulk_enable(ARRAY_SIZE(priv->supplies), priv->supplies);
}
#else
#define ak5386_soc_suspend	NULL
#define ak5386_soc_resume	NULL
#endif /* CONFIG_PM */

static struct snd_soc_codec_driver soc_codec_ak5386 = {
	.probe = ak5386_soc_probe,
	.remove = ak5386_soc_remove,
	.suspend = ak5386_soc_suspend,
	.resume = ak5386_soc_resume,
	.dapm_widgets = ak5386_dapm_widgets,
	.num_dapm_widgets = ARRAY_SIZE(ak5386_dapm_widgets),
	.dapm_routes = ak5386_dapm_routes,
	.num_dapm_routes = ARRAY_SIZE(ak5386_dapm_routes),
};

static int ak5386_set_dai_fmt(struct snd_soc_dai *codec_dai,
			      unsigned int format)
{
	struct snd_soc_codec *codec = codec_dai->codec;

	format &= SND_SOC_DAIFMT_FORMAT_MASK;
	if (format != SND_SOC_DAIFMT_LEFT_J &&
	    format != SND_SOC_DAIFMT_I2S) {
		dev_err(codec->dev, "Invalid DAI format\n");
		return -EINVAL;
	}

	return 0;
}

static int ak5386_hw_params(struct snd_pcm_substream *substream,
			    struct snd_pcm_hw_params *params,
			    struct snd_soc_dai *dai)
{
	struct snd_soc_codec *codec = dai->codec;
	struct ak5386_priv *priv = snd_soc_codec_get_drvdata(codec);

	/*
	 * From the datasheet:
	 *
	 * All external clocks (MCLK, SCLK and LRCK) must be present unless
	 * PDN pin = “L”. If these clocks are not provided, the AK5386 may
	 * draw excess current due to its use of internal dynamically
	 * refreshed logic. If the external clocks are not present, place
	 * the AK5386 in power-down mode (PDN pin = “L”).
	 */

	if (gpio_is_valid(priv->reset_gpio))
		gpio_set_value(priv->reset_gpio, 1);

	return 0;
}

static int ak5386_hw_free(struct snd_pcm_substream *substream,
			  struct snd_soc_dai *dai)
{
	struct snd_soc_codec *codec = dai->codec;
	struct ak5386_priv *priv = snd_soc_codec_get_drvdata(codec);

	if (gpio_is_valid(priv->reset_gpio))
		gpio_set_value(priv->reset_gpio, 0);

	return 0;
}

static const struct snd_soc_dai_ops ak5386_dai_ops = {
	.set_fmt	= ak5386_set_dai_fmt,
	.hw_params	= ak5386_hw_params,
	.hw_free	= ak5386_hw_free,
};

static struct snd_soc_dai_driver ak5386_dai = {
	.name		= "ak5386-hifi",
	.capture	= {
		.stream_name	= "Capture",
		.channels_min	= 1,
		.channels_max	= 2,
		.rates		= SNDRV_PCM_RATE_8000_192000,
		.formats	= SNDRV_PCM_FMTBIT_S8     |
				  SNDRV_PCM_FMTBIT_S16_LE |
				  SNDRV_PCM_FMTBIT_S24_LE |
				  SNDRV_PCM_FMTBIT_S24_3LE,
	},
	.ops	= &ak5386_dai_ops,
};

#ifdef CONFIG_OF
static const struct of_device_id ak5386_dt_ids[] = {
	{ .compatible = "asahi-kasei,ak5386", },
	{ }
};
MODULE_DEVICE_TABLE(of, ak5386_dt_ids);
#endif

static int ak5386_probe(struct platform_device *pdev)
{
	struct device *dev = &pdev->dev;
	struct ak5386_priv *priv;
	int ret, i;

	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
	if (!priv)
		return -ENOMEM;

	priv->reset_gpio = -EINVAL;
	dev_set_drvdata(dev, priv);

	for (i = 0; i < ARRAY_SIZE(supply_names); i++)
		priv->supplies[i].supply = supply_names[i];

	ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(priv->supplies),
				      priv->supplies);
	if (ret < 0)
		return ret;

	if (of_match_device(of_match_ptr(ak5386_dt_ids), dev))
		priv->reset_gpio = of_get_named_gpio(dev->of_node,
						      "reset-gpio", 0);

	if (gpio_is_valid(priv->reset_gpio))
		if (devm_gpio_request_one(dev, priv->reset_gpio,
					  GPIOF_OUT_INIT_LOW,
					  "AK5386 Reset"))
			priv->reset_gpio = -EINVAL;

	return snd_soc_register_codec(dev, &soc_codec_ak5386,
				      &ak5386_dai, 1);
}

static int ak5386_remove(struct platform_device *pdev)
{
	snd_soc_unregister_codec(&pdev->dev);
	return 0;
}

static struct platform_driver ak5386_driver = {
	.probe		= ak5386_probe,
	.remove		= ak5386_remove,
	.driver		= {
		.name	= "ak5386",
		.of_match_table = of_match_ptr(ak5386_dt_ids),
	},
};

module_platform_driver(ak5386_driver);

MODULE_DESCRIPTION("ASoC driver for AK5386 ADC");
MODULE_AUTHOR("Daniel Mack <zonque@gmail.com>");
MODULE_LICENSE("GPL");
Commit	Line	Data
cc289be8 DM	1	/*
	2	* ALSA SoC driver for
	3	* Asahi Kasei AK5386 Single-ended 24-Bit 192kHz delta-sigma ADC
	4	*
	5	* (c) 2013 Daniel Mack <zonque@gmail.com>
	6	*
	7	* This program is free software; you can redistribute it and/or modify
	8	* it under the terms of the GNU General Public License version 2 as
	9	* published by the Free Software Foundation.
	10	*/
	11
	12	#include <linux/module.h>
	13	#include <linux/slab.h>
	14	#include <linux/of.h>
	15	#include <linux/of_gpio.h>
	16	#include <linux/of_device.h>
fb668e73	17	#include <linux/regulator/consumer.h>
cc289be8 DM	18	#include <sound/soc.h>
	19	#include <sound/pcm.h>
	20	#include <sound/initval.h>
	21
2ad76541	22	static const char * const supply_names[] = {
fb668e73 DM	23	"va", "vd"
	24	};
	25
cc289be8 DM	26	struct ak5386_priv {
cc289be8 DM	27	int reset_gpio;
fb668e73	28	struct regulator_bulk_data supplies[ARRAY_SIZE(supply_names)];
cc289be8 DM	29	};
cc289be8 DM	30
dcf1439a MB	31	static const struct snd_soc_dapm_widget ak5386_dapm_widgets[] = {
	32	SND_SOC_DAPM_INPUT("AINL"),
	33	SND_SOC_DAPM_INPUT("AINR"),
	34	};
	35
	36	static const struct snd_soc_dapm_route ak5386_dapm_routes[] = {
	37	{ "Capture", NULL, "AINL" },
	38	{ "Capture", NULL, "AINR" },
	39	};
	40
fb668e73 DM	41	static int ak5386_soc_probe(struct snd_soc_codec *codec)
	42	{
	43	struct ak5386_priv *priv = snd_soc_codec_get_drvdata(codec);
	44	return regulator_bulk_enable(ARRAY_SIZE(priv->supplies), priv->supplies);
	45	}
	46
	47	static int ak5386_soc_remove(struct snd_soc_codec *codec)
	48	{
	49	struct ak5386_priv *priv = snd_soc_codec_get_drvdata(codec);
	50	regulator_bulk_disable(ARRAY_SIZE(priv->supplies), priv->supplies);
	51	return 0;
	52	}
	53
	54	#ifdef CONFIG_PM
	55	static int ak5386_soc_suspend(struct snd_soc_codec *codec)
	56	{
	57	struct ak5386_priv *priv = snd_soc_codec_get_drvdata(codec);
	58	regulator_bulk_disable(ARRAY_SIZE(priv->supplies), priv->supplies);
	59	return 0;
	60	}
	61
	62	static int ak5386_soc_resume(struct snd_soc_codec *codec)
	63	{
	64	struct ak5386_priv *priv = snd_soc_codec_get_drvdata(codec);
	65	return regulator_bulk_enable(ARRAY_SIZE(priv->supplies), priv->supplies);
	66	}
	67	#else
	68	#define ak5386_soc_suspend NULL
	69	#define ak5386_soc_resume NULL
	70	#endif /* CONFIG_PM */
	71
dcf1439a	72	static struct snd_soc_codec_driver soc_codec_ak5386 = {
fb668e73 DM	73	.probe = ak5386_soc_probe,
	74	.remove = ak5386_soc_remove,
	75	.suspend = ak5386_soc_suspend,
	76	.resume = ak5386_soc_resume,
dcf1439a MB	77	.dapm_widgets = ak5386_dapm_widgets,
	78	.num_dapm_widgets = ARRAY_SIZE(ak5386_dapm_widgets),
	79	.dapm_routes = ak5386_dapm_routes,
	80	.num_dapm_routes = ARRAY_SIZE(ak5386_dapm_routes),
	81	};
cc289be8 DM	82
	83	static int ak5386_set_dai_fmt(struct snd_soc_dai *codec_dai,
	84	unsigned int format)
	85	{
	86	struct snd_soc_codec *codec = codec_dai->codec;
	87
	88	format &= SND_SOC_DAIFMT_FORMAT_MASK;
	89	if (format != SND_SOC_DAIFMT_LEFT_J &&
	90	format != SND_SOC_DAIFMT_I2S) {
	91	dev_err(codec->dev, "Invalid DAI format\n");
	92	return -EINVAL;
	93	}
	94
	95	return 0;
	96	}
	97
	98	static int ak5386_hw_params(struct snd_pcm_substream *substream,
	99	struct snd_pcm_hw_params *params,
	100	struct snd_soc_dai *dai)
	101	{
	102	struct snd_soc_codec *codec = dai->codec;
	103	struct ak5386_priv *priv = snd_soc_codec_get_drvdata(codec);
	104
	105	/*
	106	* From the datasheet:
	107	*
	108	* All external clocks (MCLK, SCLK and LRCK) must be present unless
	109	* PDN pin = “L”. If these clocks are not provided, the AK5386 may
	110	* draw excess current due to its use of internal dynamically
	111	* refreshed logic. If the external clocks are not present, place
	112	* the AK5386 in power-down mode (PDN pin = “L”).
	113	*/
	114
	115	if (gpio_is_valid(priv->reset_gpio))
	116	gpio_set_value(priv->reset_gpio, 1);
	117
	118	return 0;
	119	}
	120
	121	static int ak5386_hw_free(struct snd_pcm_substream *substream,
	122	struct snd_soc_dai *dai)
	123	{
	124	struct snd_soc_codec *codec = dai->codec;
	125	struct ak5386_priv *priv = snd_soc_codec_get_drvdata(codec);
	126
	127	if (gpio_is_valid(priv->reset_gpio))
	128	gpio_set_value(priv->reset_gpio, 0);
	129
	130	return 0;
	131	}
	132
	133	static const struct snd_soc_dai_ops ak5386_dai_ops = {
	134	.set_fmt = ak5386_set_dai_fmt,
	135	.hw_params = ak5386_hw_params,
	136	.hw_free = ak5386_hw_free,
	137	};
	138
	139	static struct snd_soc_dai_driver ak5386_dai = {
	140	.name = "ak5386-hifi",
	141	.capture = {
	142	.stream_name = "Capture",
	143	.channels_min = 1,
	144	.channels_max = 2,
	145	.rates = SNDRV_PCM_RATE_8000_192000,
146	.formats = SNDRV_PCM_FMTBIT_S8 \|
147	SNDRV_PCM_FMTBIT_S16_LE \|
148	SNDRV_PCM_FMTBIT_S24_LE \|
149	SNDRV_PCM_FMTBIT_S24_3LE,
150	},
151	.ops = &ak5386_dai_ops,
152	};
153
154	#ifdef CONFIG_OF
155	static const struct of_device_id ak5386_dt_ids[] = {
156	{ .compatible = "asahi-kasei,ak5386", },
157	{ }
158	};
159	MODULE_DEVICE_TABLE(of, ak5386_dt_ids);
160	#endif
161
162	static int ak5386_probe(struct platform_device *pdev)
163	{
164	struct device *dev = &pdev->dev;
165	struct ak5386_priv *priv;
fb668e73	166	int ret, i;
cc289be8 DM	167
	168	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
	169	if (!priv)
	170	return -ENOMEM;
	171
	172	priv->reset_gpio = -EINVAL;
	173	dev_set_drvdata(dev, priv);
	174
fb668e73 DM	175	for (i = 0; i < ARRAY_SIZE(supply_names); i++)
	176	priv->supplies[i].supply = supply_names[i];
	177
	178	ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(priv->supplies),
	179	priv->supplies);
	180	if (ret < 0)
	181	return ret;
	182
cc289be8 DM	183	if (of_match_device(of_match_ptr(ak5386_dt_ids), dev))
	184	priv->reset_gpio = of_get_named_gpio(dev->of_node,
	185	"reset-gpio", 0);
	186
	187	if (gpio_is_valid(priv->reset_gpio))
	188	if (devm_gpio_request_one(dev, priv->reset_gpio,
	189	GPIOF_OUT_INIT_LOW,
	190	"AK5386 Reset"))
	191	priv->reset_gpio = -EINVAL;
	192
	193	return snd_soc_register_codec(dev, &soc_codec_ak5386,
	194	&ak5386_dai, 1);
	195	}
	196
	197	static int ak5386_remove(struct platform_device *pdev)
	198	{
	199	snd_soc_unregister_codec(&pdev->dev);
	200	return 0;
	201	}
	202
	203	static struct platform_driver ak5386_driver = {
	204	.probe = ak5386_probe,
	205	.remove = ak5386_remove,
	206	.driver = {
	207	.name = "ak5386",
cc289be8 DM	208	.of_match_table = of_match_ptr(ak5386_dt_ids),
	209	},
	210	};
	211
	212	module_platform_driver(ak5386_driver);
	213
	214	MODULE_DESCRIPTION("ASoC driver for AK5386 ADC");
	215	MODULE_AUTHOR("Daniel Mack <zonque@gmail.com>");
	216	MODULE_LICENSE("GPL");