[deliverable/linux.git] / sound / soc / codecs / pcm179x.c

/*
 * PCM179X 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 "pcm179x.h"

#define PCM179X_DAC_VOL_LEFT	0x10
#define PCM179X_DAC_VOL_RIGHT	0x11
#define PCM179X_FMT_CONTROL	0x12
#define PCM179X_MODE_CONTROL	0x13
#define PCM179X_SOFT_MUTE	PCM179X_FMT_CONTROL

#define PCM179X_FMT_MASK	0x70
#define PCM179X_FMT_SHIFT	4
#define PCM179X_MUTE_MASK	0x01
#define PCM179X_MUTE_SHIFT	0
#define PCM179X_ATLD_ENABLE	(1 << 7)

static const struct reg_default pcm179x_reg_defaults[] = {
	{ 0x10, 0xff },
	{ 0x11, 0xff },
	{ 0x12, 0x50 },
	{ 0x13, 0x00 },
	{ 0x14, 0x00 },
	{ 0x15, 0x01 },
	{ 0x16, 0x00 },
	{ 0x17, 0x00 },
};

static bool pcm179x_accessible_reg(struct device *dev, unsigned int reg)
{
	return reg >= 0x10 && reg <= 0x17;
}

static bool pcm179x_writeable_reg(struct device *dev, unsigned register reg)
{
	bool accessible;

	accessible = pcm179x_accessible_reg(dev, reg);

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

struct pcm179x_private {
	struct regmap *regmap;
	unsigned int format;
	unsigned int rate;
};

static int pcm179x_set_dai_fmt(struct snd_soc_dai *codec_dai,
                             unsigned int format)
{
	struct snd_soc_codec *codec = codec_dai->codec;
	struct pcm179x_private *priv = snd_soc_codec_get_drvdata(codec);

	priv->format = format;

	return 0;
}

static int pcm179x_digital_mute(struct snd_soc_dai *dai, int mute)
{
	struct snd_soc_codec *codec = dai->codec;
	struct pcm179x_private *priv = snd_soc_codec_get_drvdata(codec);
	int ret;

	ret = regmap_update_bits(priv->regmap, PCM179X_SOFT_MUTE,
				 PCM179X_MUTE_MASK, !!mute);
	if (ret < 0)
		return ret;

	return 0;
}

static int pcm179x_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 pcm179x_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 << PCM179X_FMT_SHIFT | PCM179X_ATLD_ENABLE;

	ret = regmap_update_bits(priv->regmap, PCM179X_FMT_CONTROL,
				 PCM179X_FMT_MASK | PCM179X_ATLD_ENABLE, val);
	if (ret < 0)
		return ret;

	return 0;
}

static const struct snd_soc_dai_ops pcm179x_dai_ops = {
	.set_fmt	= pcm179x_set_dai_fmt,
	.hw_params	= pcm179x_hw_params,
	.digital_mute	= pcm179x_digital_mute,
};

static const DECLARE_TLV_DB_SCALE(pcm179x_dac_tlv, -12000, 50, 1);

static const struct snd_kcontrol_new pcm179x_controls[] = {
	SOC_DOUBLE_R_RANGE_TLV("DAC Playback Volume", PCM179X_DAC_VOL_LEFT,
			 PCM179X_DAC_VOL_RIGHT, 0, 0xf, 0xff, 0,
			 pcm179x_dac_tlv),
	SOC_SINGLE("DAC Invert Output Switch", PCM179X_MODE_CONTROL, 7, 1, 0),
	SOC_SINGLE("DAC Rolloff Filter Switch", PCM179X_MODE_CONTROL, 1, 1, 0),
};

static const struct snd_soc_dapm_widget pcm179x_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 pcm179x_dapm_routes[] = {
	{ "IOUTL+", NULL, "Playback" },
	{ "IOUTL-", NULL, "Playback" },
	{ "IOUTR+", NULL, "Playback" },
	{ "IOUTR-", NULL, "Playback" },
};

static struct snd_soc_dai_driver pcm179x_dai = {
	.name = "pcm179x-hifi",
	.playback = {
		.stream_name = "Playback",
		.channels_min = 2,
		.channels_max = 2,
		.rates = PCM1792A_RATES,
		.formats = PCM1792A_FORMATS, },
	.ops = &pcm179x_dai_ops,
};

static const struct of_device_id pcm179x_of_match[] = {
	{ .compatible = "ti,pcm1792a", },
	{ }
};
MODULE_DEVICE_TABLE(of, pcm179x_of_match);

static const struct regmap_config pcm179x_regmap = {
	.reg_bits		= 8,
	.val_bits		= 8,
	.max_register		= 23,
	.reg_defaults		= pcm179x_reg_defaults,
	.num_reg_defaults	= ARRAY_SIZE(pcm179x_reg_defaults),
	.writeable_reg		= pcm179x_writeable_reg,
	.readable_reg		= pcm179x_accessible_reg,
};

static struct snd_soc_codec_driver soc_codec_dev_pcm179x = {
	.controls		= pcm179x_controls,
	.num_controls		= ARRAY_SIZE(pcm179x_controls),
	.dapm_widgets		= pcm179x_dapm_widgets,
	.num_dapm_widgets	= ARRAY_SIZE(pcm179x_dapm_widgets),
	.dapm_routes		= pcm179x_dapm_routes,
	.num_dapm_routes	= ARRAY_SIZE(pcm179x_dapm_routes),
};

static int pcm179x_spi_probe(struct spi_device *spi)
{
	struct pcm179x_private *pcm179x;
	int ret;

	pcm179x = devm_kzalloc(&spi->dev, sizeof(struct pcm179x_private),
				GFP_KERNEL);
	if (!pcm179x)
		return -ENOMEM;

	spi_set_drvdata(spi, pcm179x);

	pcm179x->regmap = devm_regmap_init_spi(spi, &pcm179x_regmap);
	if (IS_ERR(pcm179x->regmap)) {
		ret = PTR_ERR(pcm179x->regmap);
		dev_err(&spi->dev, "Failed to register regmap: %d\n", ret);
		return ret;
	}

	return snd_soc_register_codec(&spi->dev,
			&soc_codec_dev_pcm179x, &pcm179x_dai, 1);
}

static int pcm179x_spi_remove(struct spi_device *spi)
{
	snd_soc_unregister_codec(&spi->dev);
	return 0;
}

static const struct spi_device_id pcm179x_spi_ids[] = {
	{ "pcm179x", 0 },
	{ },
};
MODULE_DEVICE_TABLE(spi, pcm179x_spi_ids);

static struct spi_driver pcm179x_codec_driver = {
	.driver = {
		.name = "pcm179x",
		.of_match_table = of_match_ptr(pcm179x_of_match),
	},
	.id_table = pcm179x_spi_ids,
	.probe = pcm179x_spi_probe,
	.remove = pcm179x_spi_remove,
};

module_spi_driver(pcm179x_codec_driver);

MODULE_DESCRIPTION("ASoC PCM179X driver");
MODULE_AUTHOR("Michael Trimarchi <michael@amarulasolutions.com>");
MODULE_LICENSE("GPL");
Commit	Line	Data
13b02fa0	1	/*
823733b9	2	* PCM179X ASoC codec driver
13b02fa0 MT	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>
13b02fa0 MT	33
823733b9	34	#include "pcm179x.h"
13b02fa0	35
823733b9 MT	36	#define PCM179X_DAC_VOL_LEFT 0x10
	37	#define PCM179X_DAC_VOL_RIGHT 0x11
	38	#define PCM179X_FMT_CONTROL 0x12
	39	#define PCM179X_MODE_CONTROL 0x13
	40	#define PCM179X_SOFT_MUTE PCM179X_FMT_CONTROL
13b02fa0	41
823733b9 MT	42	#define PCM179X_FMT_MASK 0x70
	43	#define PCM179X_FMT_SHIFT 4
	44	#define PCM179X_MUTE_MASK 0x01
	45	#define PCM179X_MUTE_SHIFT 0
	46	#define PCM179X_ATLD_ENABLE (1 << 7)
13b02fa0	47
823733b9	48	static const struct reg_default pcm179x_reg_defaults[] = {
13b02fa0 MT	49	{ 0x10, 0xff },
	50	{ 0x11, 0xff },
	51	{ 0x12, 0x50 },
	52	{ 0x13, 0x00 },
	53	{ 0x14, 0x00 },
	54	{ 0x15, 0x01 },
	55	{ 0x16, 0x00 },
	56	{ 0x17, 0x00 },
	57	};
	58
823733b9	59	static bool pcm179x_accessible_reg(struct device *dev, unsigned int reg)
13b02fa0 MT	60	{
	61	return reg >= 0x10 && reg <= 0x17;
	62	}
	63
823733b9	64	static bool pcm179x_writeable_reg(struct device *dev, unsigned register reg)
13b02fa0 MT	65	{
	66	bool accessible;
	67
823733b9	68	accessible = pcm179x_accessible_reg(dev, reg);
13b02fa0 MT	69
	70	return accessible && reg != 0x16 && reg != 0x17;
	71	}
	72
823733b9	73	struct pcm179x_private {
13b02fa0 MT	74	struct regmap *regmap;
	75	unsigned int format;
	76	unsigned int rate;
	77	};
	78
823733b9	79	static int pcm179x_set_dai_fmt(struct snd_soc_dai *codec_dai,
13b02fa0 MT	80	unsigned int format)
	81	{
	82	struct snd_soc_codec *codec = codec_dai->codec;
823733b9	83	struct pcm179x_private *priv = snd_soc_codec_get_drvdata(codec);
13b02fa0 MT	84
	85	priv->format = format;
	86
	87	return 0;
	88	}
	89
823733b9	90	static int pcm179x_digital_mute(struct snd_soc_dai *dai, int mute)
13b02fa0 MT	91	{
13b02fa0 MT	92	struct snd_soc_codec *codec = dai->codec;
823733b9	93	struct pcm179x_private *priv = snd_soc_codec_get_drvdata(codec);
13b02fa0 MT	94	int ret;
13b02fa0 MT	95
823733b9 MT	96	ret = regmap_update_bits(priv->regmap, PCM179X_SOFT_MUTE,
823733b9 MT	97	PCM179X_MUTE_MASK, !!mute);
13b02fa0 MT	98	if (ret < 0)
	99	return ret;
	100
	101	return 0;
	102	}
	103
823733b9	104	static int pcm179x_hw_params(struct snd_pcm_substream *substream,
13b02fa0 MT	105	struct snd_pcm_hw_params *params,
	106	struct snd_soc_dai *dai)
	107	{
	108	struct snd_soc_codec *codec = dai->codec;
823733b9	109	struct pcm179x_private *priv = snd_soc_codec_get_drvdata(codec);
13b02fa0	110	int val = 0, ret;
13b02fa0 MT	111
	112	priv->rate = params_rate(params);
	113
	114	switch (priv->format & SND_SOC_DAIFMT_FORMAT_MASK) {
	115	case SND_SOC_DAIFMT_RIGHT_J:
e48c6d7f MB	116	switch (params_width(params)) {
	117	case 24:
	118	case 32:
	119	val = 2;
	120	break;
	121	case 16:
	122	val = 0;
	123	break;
	124	default:
	125	return -EINVAL;
	126	}
13b02fa0 MT	127	break;
13b02fa0 MT	128	case SND_SOC_DAIFMT_I2S:
e48c6d7f MB	129	switch (params_width(params)) {
	130	case 24:
	131	case 32:
	132	val = 5;
	133	break;
	134	case 16:
	135	val = 4;
	136	break;
	137	default:
	138	return -EINVAL;
	139	}
13b02fa0 MT	140	break;
	141	default:
	142	dev_err(codec->dev, "Invalid DAI format\n");
	143	return -EINVAL;
	144	}
	145
823733b9	146	val = val << PCM179X_FMT_SHIFT \| PCM179X_ATLD_ENABLE;
13b02fa0	147
823733b9 MT	148	ret = regmap_update_bits(priv->regmap, PCM179X_FMT_CONTROL,
823733b9 MT	149	PCM179X_FMT_MASK \| PCM179X_ATLD_ENABLE, val);
13b02fa0 MT	150	if (ret < 0)
	151	return ret;
	152
	153	return 0;
	154	}
	155
823733b9 MT	156	static const struct snd_soc_dai_ops pcm179x_dai_ops = {
	157	.set_fmt = pcm179x_set_dai_fmt,
	158	.hw_params = pcm179x_hw_params,
	159	.digital_mute = pcm179x_digital_mute,
13b02fa0 MT	160	};
13b02fa0 MT	161
823733b9	162	static const DECLARE_TLV_DB_SCALE(pcm179x_dac_tlv, -12000, 50, 1);
13b02fa0	163
823733b9 MT	164	static const struct snd_kcontrol_new pcm179x_controls[] = {
	165	SOC_DOUBLE_R_RANGE_TLV("DAC Playback Volume", PCM179X_DAC_VOL_LEFT,
	166	PCM179X_DAC_VOL_RIGHT, 0, 0xf, 0xff, 0,
	167	pcm179x_dac_tlv),
	168	SOC_SINGLE("DAC Invert Output Switch", PCM179X_MODE_CONTROL, 7, 1, 0),
	169	SOC_SINGLE("DAC Rolloff Filter Switch", PCM179X_MODE_CONTROL, 1, 1, 0),
13b02fa0 MT	170	};
13b02fa0 MT	171
823733b9	172	static const struct snd_soc_dapm_widget pcm179x_dapm_widgets[] = {
e7a5cb42 MB	173	SND_SOC_DAPM_OUTPUT("IOUTL+"),
	174	SND_SOC_DAPM_OUTPUT("IOUTL-"),
	175	SND_SOC_DAPM_OUTPUT("IOUTR+"),
	176	SND_SOC_DAPM_OUTPUT("IOUTR-"),
	177	};
	178
823733b9	179	static const struct snd_soc_dapm_route pcm179x_dapm_routes[] = {
e7a5cb42 MB	180	{ "IOUTL+", NULL, "Playback" },
	181	{ "IOUTL-", NULL, "Playback" },
	182	{ "IOUTR+", NULL, "Playback" },
	183	{ "IOUTR-", NULL, "Playback" },
	184	};
	185
823733b9 MT	186	static struct snd_soc_dai_driver pcm179x_dai = {
823733b9 MT	187	.name = "pcm179x-hifi",
13b02fa0 MT	188	.playback = {
	189	.stream_name = "Playback",
	190	.channels_min = 2,
	191	.channels_max = 2,
	192	.rates = PCM1792A_RATES,
	193	.formats = PCM1792A_FORMATS, },
823733b9	194	.ops = &pcm179x_dai_ops,
13b02fa0 MT	195	};
13b02fa0 MT	196
823733b9	197	static const struct of_device_id pcm179x_of_match[] = {
13b02fa0 MT	198	{ .compatible = "ti,pcm1792a", },
	199	{ }
	200	};
823733b9	201	MODULE_DEVICE_TABLE(of, pcm179x_of_match);
13b02fa0	202
823733b9	203	static const struct regmap_config pcm179x_regmap = {
13b02fa0 MT	204	.reg_bits = 8,
13b02fa0 MT	205	.val_bits = 8,
c92f66e2	206	.max_register = 23,
823733b9 MT	207	.reg_defaults = pcm179x_reg_defaults,
	208	.num_reg_defaults = ARRAY_SIZE(pcm179x_reg_defaults),
	209	.writeable_reg = pcm179x_writeable_reg,
	210	.readable_reg = pcm179x_accessible_reg,
13b02fa0 MT	211	};
13b02fa0 MT	212
823733b9 MT	213	static struct snd_soc_codec_driver soc_codec_dev_pcm179x = {
	214	.controls = pcm179x_controls,
	215	.num_controls = ARRAY_SIZE(pcm179x_controls),
	216	.dapm_widgets = pcm179x_dapm_widgets,
	217	.num_dapm_widgets = ARRAY_SIZE(pcm179x_dapm_widgets),
	218	.dapm_routes = pcm179x_dapm_routes,
	219	.num_dapm_routes = ARRAY_SIZE(pcm179x_dapm_routes),
13b02fa0 MT	220	};
13b02fa0 MT	221
823733b9	222	static int pcm179x_spi_probe(struct spi_device *spi)
13b02fa0	223	{
823733b9	224	struct pcm179x_private *pcm179x;
13b02fa0 MT	225	int ret;
13b02fa0 MT	226
823733b9	227	pcm179x = devm_kzalloc(&spi->dev, sizeof(struct pcm179x_private),
13b02fa0	228	GFP_KERNEL);
823733b9	229	if (!pcm179x)
13b02fa0 MT	230	return -ENOMEM;
13b02fa0 MT	231
823733b9	232	spi_set_drvdata(spi, pcm179x);
13b02fa0	233
823733b9 MT	234	pcm179x->regmap = devm_regmap_init_spi(spi, &pcm179x_regmap);
	235	if (IS_ERR(pcm179x->regmap)) {
	236	ret = PTR_ERR(pcm179x->regmap);
13b02fa0 MT	237	dev_err(&spi->dev, "Failed to register regmap: %d\n", ret);
	238	return ret;
	239	}
	240
	241	return snd_soc_register_codec(&spi->dev,
823733b9	242	&soc_codec_dev_pcm179x, &pcm179x_dai, 1);
13b02fa0 MT	243	}
13b02fa0 MT	244
823733b9	245	static int pcm179x_spi_remove(struct spi_device *spi)
13b02fa0 MT	246	{
	247	snd_soc_unregister_codec(&spi->dev);
	248	return 0;
	249	}
	250
823733b9 MT	251	static const struct spi_device_id pcm179x_spi_ids[] = {
823733b9 MT	252	{ "pcm179x", 0 },
13b02fa0 MT	253	{ },
13b02fa0 MT	254	};
823733b9	255	MODULE_DEVICE_TABLE(spi, pcm179x_spi_ids);
13b02fa0	256
823733b9	257	static struct spi_driver pcm179x_codec_driver = {
13b02fa0	258	.driver = {
823733b9 MT	259	.name = "pcm179x",
823733b9 MT	260	.of_match_table = of_match_ptr(pcm179x_of_match),
13b02fa0	261	},
823733b9 MT	262	.id_table = pcm179x_spi_ids,
	263	.probe = pcm179x_spi_probe,
	264	.remove = pcm179x_spi_remove,
13b02fa0 MT	265	};
13b02fa0 MT	266
823733b9	267	module_spi_driver(pcm179x_codec_driver);
13b02fa0	268
823733b9	269	MODULE_DESCRIPTION("ASoC PCM179X driver");
13b02fa0 MT	270	MODULE_AUTHOR("Michael Trimarchi <michael@amarulasolutions.com>");
13b02fa0 MT	271	MODULE_LICENSE("GPL");