[deliverable/linux.git] / sound / soc / codecs / lm4857.c

/*
 * LM4857 AMP driver
 *
 * Copyright 2007 Wolfson Microelectronics PLC.
 * Author: Graeme Gregory
 *         graeme.gregory@wolfsonmicro.com
 * Copyright 2011 Lars-Peter Clausen <lars@metafoo.de>
 *
 *  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.
 *
 */

#include <linux/init.h>
#include <linux/module.h>
#include <linux/i2c.h>
#include <linux/regmap.h>
#include <linux/slab.h>

#include <sound/core.h>
#include <sound/soc.h>
#include <sound/tlv.h>

struct lm4857 {
	struct regmap *regmap;
	uint8_t mode;
};

static const struct reg_default lm4857_default_regs[] = {
	{ 0x0, 0x00 },
	{ 0x1, 0x00 },
	{ 0x2, 0x00 },
	{ 0x3, 0x00 },
};

/* The register offsets in the cache array */
#define LM4857_MVOL 0
#define LM4857_LVOL 1
#define LM4857_RVOL 2
#define LM4857_CTRL 3

/* the shifts required to set these bits */
#define LM4857_3D 5
#define LM4857_WAKEUP 5
#define LM4857_EPGAIN 4

static int lm4857_get_mode(struct snd_kcontrol *kcontrol,
	struct snd_ctl_elem_value *ucontrol)
{
	struct snd_soc_codec *codec = snd_soc_kcontrol_codec(kcontrol);
	struct lm4857 *lm4857 = snd_soc_codec_get_drvdata(codec);

	ucontrol->value.integer.value[0] = lm4857->mode;

	return 0;
}

static int lm4857_set_mode(struct snd_kcontrol *kcontrol,
	struct snd_ctl_elem_value *ucontrol)
{
	struct snd_soc_codec *codec = snd_soc_kcontrol_codec(kcontrol);
	struct lm4857 *lm4857 = snd_soc_codec_get_drvdata(codec);
	uint8_t value = ucontrol->value.integer.value[0];

	lm4857->mode = value;

	if (codec->dapm.bias_level == SND_SOC_BIAS_ON)
		regmap_update_bits(lm4857->regmap, LM4857_CTRL, 0x0F, value + 6);

	return 1;
}

static int lm4857_set_bias_level(struct snd_soc_codec *codec,
				 enum snd_soc_bias_level level)
{
	struct lm4857 *lm4857 = snd_soc_codec_get_drvdata(codec);

	switch (level) {
	case SND_SOC_BIAS_ON:
		regmap_update_bits(lm4857->regmap, LM4857_CTRL, 0x0F,
			lm4857->mode + 6);
		break;
	case SND_SOC_BIAS_STANDBY:
		regmap_update_bits(lm4857->regmap, LM4857_CTRL, 0x0F, 0);
		break;
	default:
		break;
	}

	return 0;
}

static const char *lm4857_mode[] = {
	"Earpiece",
	"Loudspeaker",
	"Loudspeaker + Headphone",
	"Headphone",
};

static SOC_ENUM_SINGLE_EXT_DECL(lm4857_mode_enum, lm4857_mode);

static const struct snd_soc_dapm_widget lm4857_dapm_widgets[] = {
	SND_SOC_DAPM_INPUT("IN"),

	SND_SOC_DAPM_OUTPUT("LS"),
	SND_SOC_DAPM_OUTPUT("HP"),
	SND_SOC_DAPM_OUTPUT("EP"),
};

static const DECLARE_TLV_DB_SCALE(stereo_tlv, -4050, 150, 0);
static const DECLARE_TLV_DB_SCALE(mono_tlv, -3450, 150, 0);

static const struct snd_kcontrol_new lm4857_controls[] = {
	SOC_SINGLE_TLV("Left Playback Volume", LM4857_LVOL, 0, 31, 0,
		stereo_tlv),
	SOC_SINGLE_TLV("Right Playback Volume", LM4857_RVOL, 0, 31, 0,
		stereo_tlv),
	SOC_SINGLE_TLV("Mono Playback Volume", LM4857_MVOL, 0, 31, 0,
		mono_tlv),
	SOC_SINGLE("Spk 3D Playback Switch", LM4857_LVOL, LM4857_3D, 1, 0),
	SOC_SINGLE("HP 3D Playback Switch", LM4857_RVOL, LM4857_3D, 1, 0),
	SOC_SINGLE("Fast Wakeup Playback Switch", LM4857_CTRL,
		LM4857_WAKEUP, 1, 0),
	SOC_SINGLE("Earpiece 6dB Playback Switch", LM4857_CTRL,
		LM4857_EPGAIN, 1, 0),

	SOC_ENUM_EXT("Mode", lm4857_mode_enum,
		lm4857_get_mode, lm4857_set_mode),
};

/* There is a demux between the input signal and the output signals.
 * Currently there is no easy way to model it in ASoC and since it does not make
 * much of a difference in practice simply connect the input direclty to the
 * outputs. */
static const struct snd_soc_dapm_route lm4857_routes[] = {
	{"LS", NULL, "IN"},
	{"HP", NULL, "IN"},
	{"EP", NULL, "IN"},
};

static struct snd_soc_codec_driver soc_codec_dev_lm4857 = {
	.set_bias_level = lm4857_set_bias_level,

	.controls = lm4857_controls,
	.num_controls = ARRAY_SIZE(lm4857_controls),
	.dapm_widgets = lm4857_dapm_widgets,
	.num_dapm_widgets = ARRAY_SIZE(lm4857_dapm_widgets),
	.dapm_routes = lm4857_routes,
	.num_dapm_routes = ARRAY_SIZE(lm4857_routes),
};

static const struct regmap_config lm4857_regmap_config = {
	.val_bits = 6,
	.reg_bits = 2,

	.max_register = LM4857_CTRL,

	.cache_type = REGCACHE_FLAT,
	.reg_defaults = lm4857_default_regs,
	.num_reg_defaults = ARRAY_SIZE(lm4857_default_regs),
};

static int lm4857_i2c_probe(struct i2c_client *i2c,
			    const struct i2c_device_id *id)
{
	struct lm4857 *lm4857;

	lm4857 = devm_kzalloc(&i2c->dev, sizeof(*lm4857), GFP_KERNEL);
	if (!lm4857)
		return -ENOMEM;

	i2c_set_clientdata(i2c, lm4857);

	lm4857->regmap = devm_regmap_init_i2c(i2c, &lm4857_regmap_config);
	if (IS_ERR(lm4857->regmap))
		return PTR_ERR(lm4857->regmap);

	return snd_soc_register_codec(&i2c->dev, &soc_codec_dev_lm4857, NULL, 0);
}

static int lm4857_i2c_remove(struct i2c_client *i2c)
{
	snd_soc_unregister_codec(&i2c->dev);
	return 0;
}

static const struct i2c_device_id lm4857_i2c_id[] = {
	{ "lm4857", 0 },
	{ }
};
MODULE_DEVICE_TABLE(i2c, lm4857_i2c_id);

static struct i2c_driver lm4857_i2c_driver = {
	.driver = {
		.name = "lm4857",
		.owner = THIS_MODULE,
	},
	.probe = lm4857_i2c_probe,
	.remove = lm4857_i2c_remove,
	.id_table = lm4857_i2c_id,
};

module_i2c_driver(lm4857_i2c_driver);

MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
MODULE_DESCRIPTION("LM4857 amplifier driver");
MODULE_LICENSE("GPL");
Commit	Line	Data
9b0a25f0 LPC	1	/*
	2	* LM4857 AMP driver
	3	*
	4	* Copyright 2007 Wolfson Microelectronics PLC.
	5	* Author: Graeme Gregory
9a185b9a	6	* graeme.gregory@wolfsonmicro.com
9b0a25f0 LPC	7	* Copyright 2011 Lars-Peter Clausen <lars@metafoo.de>
	8	*
	9	* This program is free software; you can redistribute it and/or modify it
	10	* under the terms of the GNU General Public License as published by the
	11	* Free Software Foundation; either version 2 of the License, or (at your
	12	* option) any later version.
	13	*
	14	*/
	15
	16	#include <linux/init.h>
	17	#include <linux/module.h>
	18	#include <linux/i2c.h>
9b270968	19	#include <linux/regmap.h>
9b0a25f0 LPC	20	#include <linux/slab.h>
	21
	22	#include <sound/core.h>
	23	#include <sound/soc.h>
	24	#include <sound/tlv.h>
	25
	26	struct lm4857 {
9b270968	27	struct regmap *regmap;
9b0a25f0 LPC	28	uint8_t mode;
	29	};
	30
9b270968 LPC	31	static const struct reg_default lm4857_default_regs[] = {
	32	{ 0x0, 0x00 },
	33	{ 0x1, 0x00 },
	34	{ 0x2, 0x00 },
	35	{ 0x3, 0x00 },
9b0a25f0 LPC	36	};
	37
	38	/* The register offsets in the cache array */
	39	#define LM4857_MVOL 0
	40	#define LM4857_LVOL 1
	41	#define LM4857_RVOL 2
	42	#define LM4857_CTRL 3
	43
	44	/* the shifts required to set these bits */
	45	#define LM4857_3D 5
	46	#define LM4857_WAKEUP 5
	47	#define LM4857_EPGAIN 4
	48
9b0a25f0 LPC	49	static int lm4857_get_mode(struct snd_kcontrol *kcontrol,
	50	struct snd_ctl_elem_value *ucontrol)
	51	{
ea53bf77	52	struct snd_soc_codec *codec = snd_soc_kcontrol_codec(kcontrol);
9b0a25f0 LPC	53	struct lm4857 *lm4857 = snd_soc_codec_get_drvdata(codec);
	54
	55	ucontrol->value.integer.value[0] = lm4857->mode;
	56
	57	return 0;
	58	}
	59
	60	static int lm4857_set_mode(struct snd_kcontrol *kcontrol,
	61	struct snd_ctl_elem_value *ucontrol)
	62	{
ea53bf77	63	struct snd_soc_codec *codec = snd_soc_kcontrol_codec(kcontrol);
9b0a25f0 LPC	64	struct lm4857 *lm4857 = snd_soc_codec_get_drvdata(codec);
	65	uint8_t value = ucontrol->value.integer.value[0];
	66
	67	lm4857->mode = value;
	68
	69	if (codec->dapm.bias_level == SND_SOC_BIAS_ON)
9b270968	70	regmap_update_bits(lm4857->regmap, LM4857_CTRL, 0x0F, value + 6);
9b0a25f0 LPC	71
	72	return 1;
	73	}
	74
	75	static int lm4857_set_bias_level(struct snd_soc_codec *codec,
	76	enum snd_soc_bias_level level)
	77	{
	78	struct lm4857 *lm4857 = snd_soc_codec_get_drvdata(codec);
	79
	80	switch (level) {
	81	case SND_SOC_BIAS_ON:
9b270968 LPC	82	regmap_update_bits(lm4857->regmap, LM4857_CTRL, 0x0F,
9b270968 LPC	83	lm4857->mode + 6);
9b0a25f0 LPC	84	break;
9b0a25f0 LPC	85	case SND_SOC_BIAS_STANDBY:
9b270968	86	regmap_update_bits(lm4857->regmap, LM4857_CTRL, 0x0F, 0);
9b0a25f0 LPC	87	break;
	88	default:
	89	break;
	90	}
	91
9b0a25f0 LPC	92	return 0;
	93	}
	94
	95	static const char *lm4857_mode[] = {
	96	"Earpiece",
	97	"Loudspeaker",
	98	"Loudspeaker + Headphone",
	99	"Headphone",
	100	};
	101
6415e307	102	static SOC_ENUM_SINGLE_EXT_DECL(lm4857_mode_enum, lm4857_mode);
9b0a25f0 LPC	103
	104	static const struct snd_soc_dapm_widget lm4857_dapm_widgets[] = {
	105	SND_SOC_DAPM_INPUT("IN"),
	106
	107	SND_SOC_DAPM_OUTPUT("LS"),
	108	SND_SOC_DAPM_OUTPUT("HP"),
	109	SND_SOC_DAPM_OUTPUT("EP"),
	110	};
	111
	112	static const DECLARE_TLV_DB_SCALE(stereo_tlv, -4050, 150, 0);
	113	static const DECLARE_TLV_DB_SCALE(mono_tlv, -3450, 150, 0);
	114
	115	static const struct snd_kcontrol_new lm4857_controls[] = {
	116	SOC_SINGLE_TLV("Left Playback Volume", LM4857_LVOL, 0, 31, 0,
	117	stereo_tlv),
	118	SOC_SINGLE_TLV("Right Playback Volume", LM4857_RVOL, 0, 31, 0,
	119	stereo_tlv),
	120	SOC_SINGLE_TLV("Mono Playback Volume", LM4857_MVOL, 0, 31, 0,
	121	mono_tlv),
	122	SOC_SINGLE("Spk 3D Playback Switch", LM4857_LVOL, LM4857_3D, 1, 0),
	123	SOC_SINGLE("HP 3D Playback Switch", LM4857_RVOL, LM4857_3D, 1, 0),
	124	SOC_SINGLE("Fast Wakeup Playback Switch", LM4857_CTRL,
	125	LM4857_WAKEUP, 1, 0),
	126	SOC_SINGLE("Earpiece 6dB Playback Switch", LM4857_CTRL,
	127	LM4857_EPGAIN, 1, 0),
	128
	129	SOC_ENUM_EXT("Mode", lm4857_mode_enum,
	130	lm4857_get_mode, lm4857_set_mode),
	131	};
	132
25985edc	133	/* There is a demux between the input signal and the output signals.
9b0a25f0 LPC	134	* Currently there is no easy way to model it in ASoC and since it does not make
	135	* much of a difference in practice simply connect the input direclty to the
	136	* outputs. */
	137	static const struct snd_soc_dapm_route lm4857_routes[] = {
	138	{"LS", NULL, "IN"},
	139	{"HP", NULL, "IN"},
	140	{"EP", NULL, "IN"},
	141	};
	142
9b0a25f0	143	static struct snd_soc_codec_driver soc_codec_dev_lm4857 = {
9b0a25f0	144	.set_bias_level = lm4857_set_bias_level,
07ccc0f4 LPC	145
	146	.controls = lm4857_controls,
	147	.num_controls = ARRAY_SIZE(lm4857_controls),
	148	.dapm_widgets = lm4857_dapm_widgets,
	149	.num_dapm_widgets = ARRAY_SIZE(lm4857_dapm_widgets),
	150	.dapm_routes = lm4857_routes,
	151	.num_dapm_routes = ARRAY_SIZE(lm4857_routes),
9b0a25f0 LPC	152	};
9b0a25f0 LPC	153
9b270968 LPC	154	static const struct regmap_config lm4857_regmap_config = {
	155	.val_bits = 6,
	156	.reg_bits = 2,
	157
	158	.max_register = LM4857_CTRL,
	159
	160	.cache_type = REGCACHE_FLAT,
	161	.reg_defaults = lm4857_default_regs,
	162	.num_reg_defaults = ARRAY_SIZE(lm4857_default_regs),
	163	};
	164
7a79e94e BP	165	static int lm4857_i2c_probe(struct i2c_client *i2c,
7a79e94e BP	166	const struct i2c_device_id *id)
9b0a25f0 LPC	167	{
9b0a25f0 LPC	168	struct lm4857 *lm4857;
9b0a25f0	169
eb3bb97c	170	lm4857 = devm_kzalloc(&i2c->dev, sizeof(*lm4857), GFP_KERNEL);
9b0a25f0 LPC	171	if (!lm4857)
	172	return -ENOMEM;
	173
	174	i2c_set_clientdata(i2c, lm4857);
	175
9b270968 LPC	176	lm4857->regmap = devm_regmap_init_i2c(i2c, &lm4857_regmap_config);
	177	if (IS_ERR(lm4857->regmap))
	178	return PTR_ERR(lm4857->regmap);
9b0a25f0	179
9b270968	180	return snd_soc_register_codec(&i2c->dev, &soc_codec_dev_lm4857, NULL, 0);
9b0a25f0 LPC	181	}
9b0a25f0 LPC	182
7a79e94e	183	static int lm4857_i2c_remove(struct i2c_client *i2c)
9b0a25f0	184	{
9b0a25f0	185	snd_soc_unregister_codec(&i2c->dev);
9b0a25f0 LPC	186	return 0;
	187	}
	188
	189	static const struct i2c_device_id lm4857_i2c_id[] = {
	190	{ "lm4857", 0 },
	191	{ }
	192	};
	193	MODULE_DEVICE_TABLE(i2c, lm4857_i2c_id);
	194
	195	static struct i2c_driver lm4857_i2c_driver = {
	196	.driver = {
	197	.name = "lm4857",
	198	.owner = THIS_MODULE,
	199	},
	200	.probe = lm4857_i2c_probe,
7a79e94e	201	.remove = lm4857_i2c_remove,
9b0a25f0 LPC	202	.id_table = lm4857_i2c_id,
	203	};
	204
f6ec139f	205	module_i2c_driver(lm4857_i2c_driver);
9b0a25f0 LPC	206
	207	MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
	208	MODULE_DESCRIPTION("LM4857 amplifier driver");
	209	MODULE_LICENSE("GPL");