[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 <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 "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 int 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 = SNDRV_PCM_RATE_CONTINUOUS,
		.rate_min = 10000,
		.rate_max = 200000,
		.formats = PCM1792A_FORMATS, },
	.ops = &pcm179x_dai_ops,
};

const struct regmap_config pcm179x_regmap_config = {
	.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,
};
EXPORT_SYMBOL_GPL(pcm179x_regmap_config);

static struct snd_soc_codec_driver soc_codec_dev_pcm179x = {
	.component_driver = {
		.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),
	},
};

int pcm179x_common_init(struct device *dev, struct regmap *regmap)
{
	struct pcm179x_private *pcm179x;

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

	pcm179x->regmap = regmap;
	dev_set_drvdata(dev, pcm179x);

	return snd_soc_register_codec(dev,
			&soc_codec_dev_pcm179x, &pcm179x_dai, 1);
}
EXPORT_SYMBOL_GPL(pcm179x_common_init);

int pcm179x_common_exit(struct device *dev)
{
	snd_soc_unregister_codec(dev);
	return 0;
}
EXPORT_SYMBOL_GPL(pcm179x_common_exit);

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>
13b02fa0 MT	23
	24	#include <sound/core.h>
	25	#include <sound/pcm.h>
	26	#include <sound/pcm_params.h>
	27	#include <sound/initval.h>
	28	#include <sound/soc.h>
	29	#include <sound/tlv.h>
4b2fa512	30	#include <linux/of.h>
13b02fa0	31
823733b9	32	#include "pcm179x.h"
13b02fa0	33
823733b9 MT	34	#define PCM179X_DAC_VOL_LEFT 0x10
	35	#define PCM179X_DAC_VOL_RIGHT 0x11
	36	#define PCM179X_FMT_CONTROL 0x12
	37	#define PCM179X_MODE_CONTROL 0x13
	38	#define PCM179X_SOFT_MUTE PCM179X_FMT_CONTROL
13b02fa0	39
823733b9 MT	40	#define PCM179X_FMT_MASK 0x70
	41	#define PCM179X_FMT_SHIFT 4
	42	#define PCM179X_MUTE_MASK 0x01
	43	#define PCM179X_MUTE_SHIFT 0
	44	#define PCM179X_ATLD_ENABLE (1 << 7)
13b02fa0	45
823733b9	46	static const struct reg_default pcm179x_reg_defaults[] = {
13b02fa0 MT	47	{ 0x10, 0xff },
	48	{ 0x11, 0xff },
	49	{ 0x12, 0x50 },
	50	{ 0x13, 0x00 },
	51	{ 0x14, 0x00 },
	52	{ 0x15, 0x01 },
	53	{ 0x16, 0x00 },
	54	{ 0x17, 0x00 },
	55	};
	56
823733b9	57	static bool pcm179x_accessible_reg(struct device *dev, unsigned int reg)
13b02fa0 MT	58	{
	59	return reg >= 0x10 && reg <= 0x17;
	60	}
	61
a074ae0e	62	static bool pcm179x_writeable_reg(struct device *dev, unsigned int reg)
13b02fa0 MT	63	{
	64	bool accessible;
	65
823733b9	66	accessible = pcm179x_accessible_reg(dev, reg);
13b02fa0 MT	67
	68	return accessible && reg != 0x16 && reg != 0x17;
	69	}
	70
823733b9	71	struct pcm179x_private {
13b02fa0 MT	72	struct regmap *regmap;
	73	unsigned int format;
	74	unsigned int rate;
	75	};
	76
823733b9	77	static int pcm179x_set_dai_fmt(struct snd_soc_dai *codec_dai,
13b02fa0 MT	78	unsigned int format)
	79	{
	80	struct snd_soc_codec *codec = codec_dai->codec;
823733b9	81	struct pcm179x_private *priv = snd_soc_codec_get_drvdata(codec);
13b02fa0 MT	82
	83	priv->format = format;
	84
	85	return 0;
	86	}
	87
823733b9	88	static int pcm179x_digital_mute(struct snd_soc_dai *dai, int mute)
13b02fa0 MT	89	{
13b02fa0 MT	90	struct snd_soc_codec *codec = dai->codec;
823733b9	91	struct pcm179x_private *priv = snd_soc_codec_get_drvdata(codec);
13b02fa0 MT	92	int ret;
13b02fa0 MT	93
823733b9 MT	94	ret = regmap_update_bits(priv->regmap, PCM179X_SOFT_MUTE,
823733b9 MT	95	PCM179X_MUTE_MASK, !!mute);
13b02fa0 MT	96	if (ret < 0)
	97	return ret;
	98
	99	return 0;
	100	}
	101
823733b9	102	static int pcm179x_hw_params(struct snd_pcm_substream *substream,
13b02fa0 MT	103	struct snd_pcm_hw_params *params,
	104	struct snd_soc_dai *dai)
	105	{
	106	struct snd_soc_codec *codec = dai->codec;
823733b9	107	struct pcm179x_private *priv = snd_soc_codec_get_drvdata(codec);
13b02fa0	108	int val = 0, ret;
13b02fa0 MT	109
	110	priv->rate = params_rate(params);
	111
	112	switch (priv->format & SND_SOC_DAIFMT_FORMAT_MASK) {
	113	case SND_SOC_DAIFMT_RIGHT_J:
e48c6d7f MB	114	switch (params_width(params)) {
	115	case 24:
	116	case 32:
	117	val = 2;
	118	break;
	119	case 16:
	120	val = 0;
	121	break;
	122	default:
	123	return -EINVAL;
	124	}
13b02fa0 MT	125	break;
13b02fa0 MT	126	case SND_SOC_DAIFMT_I2S:
e48c6d7f MB	127	switch (params_width(params)) {
	128	case 24:
	129	case 32:
	130	val = 5;
	131	break;
	132	case 16:
	133	val = 4;
	134	break;
	135	default:
	136	return -EINVAL;
	137	}
13b02fa0 MT	138	break;
	139	default:
	140	dev_err(codec->dev, "Invalid DAI format\n");
	141	return -EINVAL;
	142	}
	143
823733b9	144	val = val << PCM179X_FMT_SHIFT \| PCM179X_ATLD_ENABLE;
13b02fa0	145
823733b9 MT	146	ret = regmap_update_bits(priv->regmap, PCM179X_FMT_CONTROL,
823733b9 MT	147	PCM179X_FMT_MASK \| PCM179X_ATLD_ENABLE, val);
13b02fa0 MT	148	if (ret < 0)
	149	return ret;
	150
	151	return 0;
	152	}
	153
823733b9 MT	154	static const struct snd_soc_dai_ops pcm179x_dai_ops = {
	155	.set_fmt = pcm179x_set_dai_fmt,
	156	.hw_params = pcm179x_hw_params,
	157	.digital_mute = pcm179x_digital_mute,
13b02fa0 MT	158	};
13b02fa0 MT	159
823733b9	160	static const DECLARE_TLV_DB_SCALE(pcm179x_dac_tlv, -12000, 50, 1);
13b02fa0	161
823733b9 MT	162	static const struct snd_kcontrol_new pcm179x_controls[] = {
	163	SOC_DOUBLE_R_RANGE_TLV("DAC Playback Volume", PCM179X_DAC_VOL_LEFT,
	164	PCM179X_DAC_VOL_RIGHT, 0, 0xf, 0xff, 0,
	165	pcm179x_dac_tlv),
	166	SOC_SINGLE("DAC Invert Output Switch", PCM179X_MODE_CONTROL, 7, 1, 0),
	167	SOC_SINGLE("DAC Rolloff Filter Switch", PCM179X_MODE_CONTROL, 1, 1, 0),
13b02fa0 MT	168	};
13b02fa0 MT	169
823733b9	170	static const struct snd_soc_dapm_widget pcm179x_dapm_widgets[] = {
e7a5cb42 MB	171	SND_SOC_DAPM_OUTPUT("IOUTL+"),
	172	SND_SOC_DAPM_OUTPUT("IOUTL-"),
	173	SND_SOC_DAPM_OUTPUT("IOUTR+"),
	174	SND_SOC_DAPM_OUTPUT("IOUTR-"),
	175	};
	176
823733b9	177	static const struct snd_soc_dapm_route pcm179x_dapm_routes[] = {
e7a5cb42 MB	178	{ "IOUTL+", NULL, "Playback" },
	179	{ "IOUTL-", NULL, "Playback" },
	180	{ "IOUTR+", NULL, "Playback" },
	181	{ "IOUTR-", NULL, "Playback" },
	182	};
	183
823733b9 MT	184	static struct snd_soc_dai_driver pcm179x_dai = {
823733b9 MT	185	.name = "pcm179x-hifi",
13b02fa0 MT	186	.playback = {
	187	.stream_name = "Playback",
	188	.channels_min = 2,
	189	.channels_max = 2,
e0236f54 JS	190	.rates = SNDRV_PCM_RATE_CONTINUOUS,
	191	.rate_min = 10000,
	192	.rate_max = 200000,
13b02fa0	193	.formats = PCM1792A_FORMATS, },
823733b9	194	.ops = &pcm179x_dai_ops,
13b02fa0 MT	195	};
13b02fa0 MT	196
1b347b68	197	const struct regmap_config pcm179x_regmap_config = {
13b02fa0 MT	198	.reg_bits = 8,
13b02fa0 MT	199	.val_bits = 8,
c92f66e2	200	.max_register = 23,
823733b9 MT	201	.reg_defaults = pcm179x_reg_defaults,
	202	.num_reg_defaults = ARRAY_SIZE(pcm179x_reg_defaults),
	203	.writeable_reg = pcm179x_writeable_reg,
	204	.readable_reg = pcm179x_accessible_reg,
13b02fa0	205	};
1b347b68	206	EXPORT_SYMBOL_GPL(pcm179x_regmap_config);
13b02fa0	207
823733b9	208	static struct snd_soc_codec_driver soc_codec_dev_pcm179x = {
98773a87 KM	209	.component_driver = {
	210	.controls = pcm179x_controls,
	211	.num_controls = ARRAY_SIZE(pcm179x_controls),
	212	.dapm_widgets = pcm179x_dapm_widgets,
	213	.num_dapm_widgets = ARRAY_SIZE(pcm179x_dapm_widgets),
	214	.dapm_routes = pcm179x_dapm_routes,
	215	.num_dapm_routes = ARRAY_SIZE(pcm179x_dapm_routes),
	216	},
13b02fa0 MT	217	};
13b02fa0 MT	218
1b347b68	219	int pcm179x_common_init(struct device dev, struct regmap regmap)
13b02fa0	220	{
823733b9	221	struct pcm179x_private *pcm179x;
13b02fa0	222
1b347b68	223	pcm179x = devm_kzalloc(dev, sizeof(struct pcm179x_private),
13b02fa0	224	GFP_KERNEL);
823733b9	225	if (!pcm179x)
13b02fa0 MT	226	return -ENOMEM;
13b02fa0 MT	227
1b347b68 JS	228	pcm179x->regmap = regmap;
1b347b68 JS	229	dev_set_drvdata(dev, pcm179x);
13b02fa0	230
1b347b68	231	return snd_soc_register_codec(dev,
823733b9	232	&soc_codec_dev_pcm179x, &pcm179x_dai, 1);
13b02fa0	233	}
1b347b68	234	EXPORT_SYMBOL_GPL(pcm179x_common_init);
13b02fa0	235
1b347b68	236	int pcm179x_common_exit(struct device *dev)
13b02fa0	237	{
1b347b68	238	snd_soc_unregister_codec(dev);
13b02fa0 MT	239	return 0;
13b02fa0 MT	240	}
1b347b68	241	EXPORT_SYMBOL_GPL(pcm179x_common_exit);
13b02fa0	242
823733b9	243	MODULE_DESCRIPTION("ASoC PCM179X driver");
13b02fa0 MT	244	MODULE_AUTHOR("Michael Trimarchi <michael@amarulasolutions.com>");
13b02fa0 MT	245	MODULE_LICENSE("GPL");