[deliverable/linux.git] / sound / soc / codecs / pcm1792a.c

/*
 * PCM1792A ASoC codec driver
 *
 * Copyright (c) Amarula Solutions B.V. 2013
 *
 *     Michael Trimarchi <michael@amarulasolutions.com>
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 */

#include <linux/module.h>
#include <linux/slab.h>
#include <linux/kernel.h>
#include <linux/device.h>
#include <linux/spi/spi.h>

#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/initval.h>
#include <sound/soc.h>
#include <sound/tlv.h>
#include <linux/of.h>
#include <linux/of_device.h>

#include "pcm1792a.h"

#define PCM1792A_DAC_VOL_LEFT	0x10
#define PCM1792A_DAC_VOL_RIGHT	0x11
#define PCM1792A_FMT_CONTROL	0x12
#define PCM1792A_SOFT_MUTE	PCM1792A_FMT_CONTROL

#define PCM1792A_FMT_MASK	0x70
#define PCM1792A_FMT_SHIFT	4
#define PCM1792A_MUTE_MASK	0x01
#define PCM1792A_MUTE_SHIFT	0
#define PCM1792A_ATLD_ENABLE	(1 << 7)

static const struct reg_default pcm1792a_reg_defaults[] = {
	{ 0x10, 0xff },
	{ 0x11, 0xff },
	{ 0x12, 0x50 },
	{ 0x13, 0x00 },
	{ 0x14, 0x00 },
	{ 0x15, 0x01 },
	{ 0x16, 0x00 },
	{ 0x17, 0x00 },
};

static bool pcm1792a_accessible_reg(struct device *dev, unsigned int reg)
{
	return reg >= 0x10 && reg <= 0x17;
}

static bool pcm1792a_writeable_reg(struct device *dev, unsigned register reg)
{
	bool accessible;

	accessible = pcm1792a_accessible_reg(dev, reg);

	return accessible && reg != 0x16 && reg != 0x17;
}

struct pcm1792a_private {
	struct regmap *regmap;
	unsigned int format;
	unsigned int rate;
};

static int pcm1792a_set_dai_fmt(struct snd_soc_dai *codec_dai,
                             unsigned int format)
{
	struct snd_soc_codec *codec = codec_dai->codec;
	struct pcm1792a_private *priv = snd_soc_codec_get_drvdata(codec);

	priv->format = format;

	return 0;
}

static int pcm1792a_digital_mute(struct snd_soc_dai *dai, int mute)
{
	struct snd_soc_codec *codec = dai->codec;
	struct pcm1792a_private *priv = snd_soc_codec_get_drvdata(codec);
	int ret;

	ret = regmap_update_bits(priv->regmap, PCM1792A_SOFT_MUTE,
				 PCM1792A_MUTE_MASK, !!mute);
	if (ret < 0)
		return ret;

	return 0;
}

static int pcm1792a_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 pcm1792a_private *priv = snd_soc_codec_get_drvdata(codec);
	int val = 0, ret;

	priv->rate = params_rate(params);

	switch (priv->format & SND_SOC_DAIFMT_FORMAT_MASK) {
	case SND_SOC_DAIFMT_RIGHT_J:
		switch (params_width(params)) {
		case 24:
		case 32:
			val = 2;
			break;
		case 16:
			val = 0;
			break;
		default:
			return -EINVAL;
		}
		break;
	case SND_SOC_DAIFMT_I2S:
		switch (params_width(params)) {
		case 24:
		case 32:
			val = 5;
			break;
		case 16:
			val = 4;
			break;
		default:
			return -EINVAL;
		}
		break;
	default:
		dev_err(codec->dev, "Invalid DAI format\n");
		return -EINVAL;
	}

	val = val << PCM1792A_FMT_SHIFT | PCM1792A_ATLD_ENABLE;

	ret = regmap_update_bits(priv->regmap, PCM1792A_FMT_CONTROL,
				 PCM1792A_FMT_MASK | PCM1792A_ATLD_ENABLE, val);
	if (ret < 0)
		return ret;

	return 0;
}

static const struct snd_soc_dai_ops pcm1792a_dai_ops = {
	.set_fmt	= pcm1792a_set_dai_fmt,
	.hw_params	= pcm1792a_hw_params,
	.digital_mute	= pcm1792a_digital_mute,
};

static const DECLARE_TLV_DB_SCALE(pcm1792a_dac_tlv, -12000, 50, 1);

static const struct snd_kcontrol_new pcm1792a_controls[] = {
	SOC_DOUBLE_R_RANGE_TLV("DAC Playback Volume", PCM1792A_DAC_VOL_LEFT,
			 PCM1792A_DAC_VOL_RIGHT, 0, 0xf, 0xff, 0,
			 pcm1792a_dac_tlv),
};

static const struct snd_soc_dapm_widget pcm1792a_dapm_widgets[] = {
SND_SOC_DAPM_OUTPUT("IOUTL+"),
SND_SOC_DAPM_OUTPUT("IOUTL-"),
SND_SOC_DAPM_OUTPUT("IOUTR+"),
SND_SOC_DAPM_OUTPUT("IOUTR-"),
};

static const struct snd_soc_dapm_route pcm1792a_dapm_routes[] = {
	{ "IOUTL+", NULL, "Playback" },
	{ "IOUTL-", NULL, "Playback" },
	{ "IOUTR+", NULL, "Playback" },
	{ "IOUTR-", NULL, "Playback" },
};

static struct snd_soc_dai_driver pcm1792a_dai = {
	.name = "pcm1792a-hifi",
	.playback = {
		.stream_name = "Playback",
		.channels_min = 2,
		.channels_max = 2,
		.rates = PCM1792A_RATES,
		.formats = PCM1792A_FORMATS, },
	.ops = &pcm1792a_dai_ops,
};

static const struct of_device_id pcm1792a_of_match[] = {
	{ .compatible = "ti,pcm1792a", },
	{ }
};
MODULE_DEVICE_TABLE(of, pcm1792a_of_match);

static const struct regmap_config pcm1792a_regmap = {
	.reg_bits		= 8,
	.val_bits		= 8,
	.max_register		= 23,
	.reg_defaults		= pcm1792a_reg_defaults,
	.num_reg_defaults	= ARRAY_SIZE(pcm1792a_reg_defaults),
	.writeable_reg		= pcm1792a_writeable_reg,
	.readable_reg		= pcm1792a_accessible_reg,
};

static struct snd_soc_codec_driver soc_codec_dev_pcm1792a = {
	.controls		= pcm1792a_controls,
	.num_controls		= ARRAY_SIZE(pcm1792a_controls),
	.dapm_widgets		= pcm1792a_dapm_widgets,
	.num_dapm_widgets	= ARRAY_SIZE(pcm1792a_dapm_widgets),
	.dapm_routes		= pcm1792a_dapm_routes,
	.num_dapm_routes	= ARRAY_SIZE(pcm1792a_dapm_routes),
};

static int pcm1792a_spi_probe(struct spi_device *spi)
{
	struct pcm1792a_private *pcm1792a;
	int ret;

	pcm1792a = devm_kzalloc(&spi->dev, sizeof(struct pcm1792a_private),
				GFP_KERNEL);
	if (!pcm1792a)
		return -ENOMEM;

	spi_set_drvdata(spi, pcm1792a);

	pcm1792a->regmap = devm_regmap_init_spi(spi, &pcm1792a_regmap);
	if (IS_ERR(pcm1792a->regmap)) {
		ret = PTR_ERR(pcm1792a->regmap);
		dev_err(&spi->dev, "Failed to register regmap: %d\n", ret);
		return ret;
	}

	return snd_soc_register_codec(&spi->dev,
			&soc_codec_dev_pcm1792a, &pcm1792a_dai, 1);
}

static int pcm1792a_spi_remove(struct spi_device *spi)
{
	snd_soc_unregister_codec(&spi->dev);
	return 0;
}

static const struct spi_device_id pcm1792a_spi_ids[] = {
	{ "pcm1792a", 0 },
	{ },
};
MODULE_DEVICE_TABLE(spi, pcm1792a_spi_ids);

static struct spi_driver pcm1792a_codec_driver = {
	.driver = {
		.name = "pcm1792a",
		.owner = THIS_MODULE,
		.of_match_table = of_match_ptr(pcm1792a_of_match),
	},
	.id_table = pcm1792a_spi_ids,
	.probe = pcm1792a_spi_probe,
	.remove = pcm1792a_spi_remove,
};

module_spi_driver(pcm1792a_codec_driver);

MODULE_DESCRIPTION("ASoC PCM1792A driver");
MODULE_AUTHOR("Michael Trimarchi <michael@amarulasolutions.com>");
MODULE_LICENSE("GPL");
Commit	Line	Data
13b02fa0 MT	1	/*
	2	* PCM1792A ASoC codec driver
	3	*
	4	* Copyright (c) Amarula Solutions B.V. 2013
	5	*
	6	* Michael Trimarchi <michael@amarulasolutions.com>
	7	*
	8	* This program is free software; you can redistribute it and/or
	9	* modify it under the terms of the GNU General Public License
	10	* as published by the Free Software Foundation; either version 2
	11	* of the License, or (at your option) any later version.
	12	*
	13	* This program is distributed in the hope that it will be useful,
	14	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	15	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	16	* GNU General Public License for more details.
	17	*/
	18
	19	#include <linux/module.h>
	20	#include <linux/slab.h>
	21	#include <linux/kernel.h>
	22	#include <linux/device.h>
	23	#include <linux/spi/spi.h>
	24
	25	#include <sound/core.h>
	26	#include <sound/pcm.h>
	27	#include <sound/pcm_params.h>
	28	#include <sound/initval.h>
	29	#include <sound/soc.h>
	30	#include <sound/tlv.h>
4b2fa512	31	#include <linux/of.h>
13b02fa0 MT	32	#include <linux/of_device.h>
	33
	34	#include "pcm1792a.h"
	35
	36	#define PCM1792A_DAC_VOL_LEFT 0x10
	37	#define PCM1792A_DAC_VOL_RIGHT 0x11
	38	#define PCM1792A_FMT_CONTROL 0x12
	39	#define PCM1792A_SOFT_MUTE PCM1792A_FMT_CONTROL
	40
	41	#define PCM1792A_FMT_MASK 0x70
	42	#define PCM1792A_FMT_SHIFT 4
	43	#define PCM1792A_MUTE_MASK 0x01
	44	#define PCM1792A_MUTE_SHIFT 0
	45	#define PCM1792A_ATLD_ENABLE (1 << 7)
	46
	47	static const struct reg_default pcm1792a_reg_defaults[] = {
	48	{ 0x10, 0xff },
	49	{ 0x11, 0xff },
	50	{ 0x12, 0x50 },
	51	{ 0x13, 0x00 },
	52	{ 0x14, 0x00 },
	53	{ 0x15, 0x01 },
	54	{ 0x16, 0x00 },
	55	{ 0x17, 0x00 },
	56	};
	57
	58	static bool pcm1792a_accessible_reg(struct device *dev, unsigned int reg)
	59	{
	60	return reg >= 0x10 && reg <= 0x17;
	61	}
	62
	63	static bool pcm1792a_writeable_reg(struct device *dev, unsigned register reg)
	64	{
	65	bool accessible;
	66
	67	accessible = pcm1792a_accessible_reg(dev, reg);
	68
	69	return accessible && reg != 0x16 && reg != 0x17;
	70	}
	71
	72	struct pcm1792a_private {
	73	struct regmap *regmap;
	74	unsigned int format;
	75	unsigned int rate;
	76	};
	77
	78	static int pcm1792a_set_dai_fmt(struct snd_soc_dai *codec_dai,
	79	unsigned int format)
	80	{
	81	struct snd_soc_codec *codec = codec_dai->codec;
	82	struct pcm1792a_private *priv = snd_soc_codec_get_drvdata(codec);
	83
	84	priv->format = format;
	85
	86	return 0;
	87	}
	88
	89	static int pcm1792a_digital_mute(struct snd_soc_dai *dai, int mute)
	90	{
	91	struct snd_soc_codec *codec = dai->codec;
	92	struct pcm1792a_private *priv = snd_soc_codec_get_drvdata(codec);
	93	int ret;
	94
	95	ret = regmap_update_bits(priv->regmap, PCM1792A_SOFT_MUTE,
96	PCM1792A_MUTE_MASK, !!mute);
97	if (ret < 0)
98	return ret;
99
100	return 0;
101	}
102
103	static int pcm1792a_hw_params(struct snd_pcm_substream *substream,
104	struct snd_pcm_hw_params *params,
105	struct snd_soc_dai *dai)
106	{
107	struct snd_soc_codec *codec = dai->codec;
108	struct pcm1792a_private *priv = snd_soc_codec_get_drvdata(codec);
109	int val = 0, ret;
13b02fa0 MT	110
	111	priv->rate = params_rate(params);
	112
	113	switch (priv->format & SND_SOC_DAIFMT_FORMAT_MASK) {
	114	case SND_SOC_DAIFMT_RIGHT_J:
e48c6d7f MB	115	switch (params_width(params)) {
	116	case 24:
	117	case 32:
	118	val = 2;
	119	break;
	120	case 16:
	121	val = 0;
	122	break;
	123	default:
	124	return -EINVAL;
	125	}
13b02fa0 MT	126	break;
13b02fa0 MT	127	case SND_SOC_DAIFMT_I2S:
e48c6d7f MB	128	switch (params_width(params)) {
	129	case 24:
	130	case 32:
	131	val = 5;
	132	break;
	133	case 16:
	134	val = 4;
	135	break;
	136	default:
	137	return -EINVAL;
	138	}
13b02fa0 MT	139	break;
	140	default:
	141	dev_err(codec->dev, "Invalid DAI format\n");
	142	return -EINVAL;
	143	}
	144
	145	val = val << PCM1792A_FMT_SHIFT \| PCM1792A_ATLD_ENABLE;
	146
	147	ret = regmap_update_bits(priv->regmap, PCM1792A_FMT_CONTROL,
	148	PCM1792A_FMT_MASK \| PCM1792A_ATLD_ENABLE, val);
	149	if (ret < 0)
	150	return ret;
	151
	152	return 0;
	153	}
	154
	155	static const struct snd_soc_dai_ops pcm1792a_dai_ops = {
	156	.set_fmt = pcm1792a_set_dai_fmt,
	157	.hw_params = pcm1792a_hw_params,
	158	.digital_mute = pcm1792a_digital_mute,
	159	};
	160
	161	static const DECLARE_TLV_DB_SCALE(pcm1792a_dac_tlv, -12000, 50, 1);
	162
	163	static const struct snd_kcontrol_new pcm1792a_controls[] = {
	164	SOC_DOUBLE_R_RANGE_TLV("DAC Playback Volume", PCM1792A_DAC_VOL_LEFT,
	165	PCM1792A_DAC_VOL_RIGHT, 0, 0xf, 0xff, 0,
	166	pcm1792a_dac_tlv),
	167	};
	168
e7a5cb42 MB	169	static const struct snd_soc_dapm_widget pcm1792a_dapm_widgets[] = {
	170	SND_SOC_DAPM_OUTPUT("IOUTL+"),
	171	SND_SOC_DAPM_OUTPUT("IOUTL-"),
	172	SND_SOC_DAPM_OUTPUT("IOUTR+"),
	173	SND_SOC_DAPM_OUTPUT("IOUTR-"),
	174	};
	175
	176	static const struct snd_soc_dapm_route pcm1792a_dapm_routes[] = {
	177	{ "IOUTL+", NULL, "Playback" },
	178	{ "IOUTL-", NULL, "Playback" },
	179	{ "IOUTR+", NULL, "Playback" },
	180	{ "IOUTR-", NULL, "Playback" },
	181	};
	182
13b02fa0 MT	183	static struct snd_soc_dai_driver pcm1792a_dai = {
	184	.name = "pcm1792a-hifi",
	185	.playback = {
	186	.stream_name = "Playback",
	187	.channels_min = 2,
	188	.channels_max = 2,
	189	.rates = PCM1792A_RATES,
	190	.formats = PCM1792A_FORMATS, },
13b02fa0 MT	191	.ops = &pcm1792a_dai_ops,
	192	};
	193
13b02fa0 MT	194	static const struct of_device_id pcm1792a_of_match[] = {
	195	{ .compatible = "ti,pcm1792a", },
	196	{ }
	197	};
	198	MODULE_DEVICE_TABLE(of, pcm1792a_of_match);
13b02fa0 MT	199
	200	static const struct regmap_config pcm1792a_regmap = {
	201	.reg_bits = 8,
	202	.val_bits = 8,
c92f66e2	203	.max_register = 23,
13b02fa0 MT	204	.reg_defaults = pcm1792a_reg_defaults,
	205	.num_reg_defaults = ARRAY_SIZE(pcm1792a_reg_defaults),
	206	.writeable_reg = pcm1792a_writeable_reg,
	207	.readable_reg = pcm1792a_accessible_reg,
	208	};
	209
	210	static struct snd_soc_codec_driver soc_codec_dev_pcm1792a = {
	211	.controls = pcm1792a_controls,
	212	.num_controls = ARRAY_SIZE(pcm1792a_controls),
e7a5cb42 MB	213	.dapm_widgets = pcm1792a_dapm_widgets,
	214	.num_dapm_widgets = ARRAY_SIZE(pcm1792a_dapm_widgets),
	215	.dapm_routes = pcm1792a_dapm_routes,
	216	.num_dapm_routes = ARRAY_SIZE(pcm1792a_dapm_routes),
13b02fa0 MT	217	};
	218
	219	static int pcm1792a_spi_probe(struct spi_device *spi)
	220	{
	221	struct pcm1792a_private *pcm1792a;
	222	int ret;
	223
	224	pcm1792a = devm_kzalloc(&spi->dev, sizeof(struct pcm1792a_private),
	225	GFP_KERNEL);
	226	if (!pcm1792a)
	227	return -ENOMEM;
	228
	229	spi_set_drvdata(spi, pcm1792a);
	230
	231	pcm1792a->regmap = devm_regmap_init_spi(spi, &pcm1792a_regmap);
	232	if (IS_ERR(pcm1792a->regmap)) {
	233	ret = PTR_ERR(pcm1792a->regmap);
	234	dev_err(&spi->dev, "Failed to register regmap: %d\n", ret);
	235	return ret;
	236	}
	237
	238	return snd_soc_register_codec(&spi->dev,
	239	&soc_codec_dev_pcm1792a, &pcm1792a_dai, 1);
	240	}
	241
	242	static int pcm1792a_spi_remove(struct spi_device *spi)
	243	{
	244	snd_soc_unregister_codec(&spi->dev);
	245	return 0;
	246	}
	247
	248	static const struct spi_device_id pcm1792a_spi_ids[] = {
	249	{ "pcm1792a", 0 },
	250	{ },
	251	};
	252	MODULE_DEVICE_TABLE(spi, pcm1792a_spi_ids);
	253
	254	static struct spi_driver pcm1792a_codec_driver = {
	255	.driver = {
	256	.name = "pcm1792a",
	257	.owner = THIS_MODULE,
55af2d23	258	.of_match_table = of_match_ptr(pcm1792a_of_match),
13b02fa0 MT	259	},
	260	.id_table = pcm1792a_spi_ids,
	261	.probe = pcm1792a_spi_probe,
	262	.remove = pcm1792a_spi_remove,
	263	};
	264
	265	module_spi_driver(pcm1792a_codec_driver);
	266
	267	MODULE_DESCRIPTION("ASoC PCM1792A driver");
	268	MODULE_AUTHOR("Michael Trimarchi <michael@amarulasolutions.com>");
	269	MODULE_LICENSE("GPL");