[deliverable/linux.git] / sound / soc / codecs / max9768.c

/*
 * MAX9768 AMP driver
 *
 * Copyright (C) 2011, 2012 by Wolfram Sang, Pengutronix e.K.
 *
 * 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; version 2 of the License.
 */

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

#include <sound/core.h>
#include <sound/soc.h>
#include <sound/tlv.h>
#include <sound/max9768.h>

/* "Registers" */
#define MAX9768_VOL 0
#define MAX9768_CTRL 3

/* Commands */
#define MAX9768_CTRL_PWM 0x15
#define MAX9768_CTRL_FILTERLESS 0x16

struct max9768 {
	struct regmap *regmap;
	int mute_gpio;
	int shdn_gpio;
	u32 flags;
};

static const struct reg_default max9768_default_regs[] = {
	{ 0, 0 },
	{ 3,  MAX9768_CTRL_FILTERLESS},
};

static int max9768_get_gpio(struct snd_kcontrol *kcontrol,
	struct snd_ctl_elem_value *ucontrol)
{
	struct snd_soc_component *c = snd_soc_kcontrol_component(kcontrol);
	struct max9768 *max9768 = snd_soc_component_get_drvdata(c);
	int val = gpio_get_value_cansleep(max9768->mute_gpio);

	ucontrol->value.integer.value[0] = !val;

	return 0;
}

static int max9768_set_gpio(struct snd_kcontrol *kcontrol,
	struct snd_ctl_elem_value *ucontrol)
{
	struct snd_soc_component *c = snd_soc_kcontrol_component(kcontrol);
	struct max9768 *max9768 = snd_soc_component_get_drvdata(c);

	gpio_set_value_cansleep(max9768->mute_gpio, !ucontrol->value.integer.value[0]);

	return 0;
}

static const DECLARE_TLV_DB_RANGE(volume_tlv,
	0, 0, TLV_DB_SCALE_ITEM(-16150, 0, 0),
	1, 1, TLV_DB_SCALE_ITEM(-9280, 0, 0),
	2, 2, TLV_DB_SCALE_ITEM(-9030, 0, 0),
	3, 3, TLV_DB_SCALE_ITEM(-8680, 0, 0),
	4, 4, TLV_DB_SCALE_ITEM(-8430, 0, 0),
	5, 5, TLV_DB_SCALE_ITEM(-8080, 0, 0),
	6, 6, TLV_DB_SCALE_ITEM(-7830, 0, 0),
	7, 7, TLV_DB_SCALE_ITEM(-7470, 0, 0),
	8, 8, TLV_DB_SCALE_ITEM(-7220, 0, 0),
	9, 9, TLV_DB_SCALE_ITEM(-6870, 0, 0),
	10, 10, TLV_DB_SCALE_ITEM(-6620, 0, 0),
	11, 11, TLV_DB_SCALE_ITEM(-6270, 0, 0),
	12, 12, TLV_DB_SCALE_ITEM(-6020, 0, 0),
	13, 13, TLV_DB_SCALE_ITEM(-5670, 0, 0),
	14, 14, TLV_DB_SCALE_ITEM(-5420, 0, 0),
	15, 17, TLV_DB_SCALE_ITEM(-5060, 250, 0),
	18, 18, TLV_DB_SCALE_ITEM(-4370, 0, 0),
	19, 19, TLV_DB_SCALE_ITEM(-4210, 0, 0),
	20, 20, TLV_DB_SCALE_ITEM(-3960, 0, 0),
	21, 21, TLV_DB_SCALE_ITEM(-3760, 0, 0),
	22, 22, TLV_DB_SCALE_ITEM(-3600, 0, 0),
	23, 23, TLV_DB_SCALE_ITEM(-3340, 0, 0),
	24, 24, TLV_DB_SCALE_ITEM(-3150, 0, 0),
	25, 25, TLV_DB_SCALE_ITEM(-2980, 0, 0),
	26, 26, TLV_DB_SCALE_ITEM(-2720, 0, 0),
	27, 27, TLV_DB_SCALE_ITEM(-2520, 0, 0),
	28, 30, TLV_DB_SCALE_ITEM(-2350, 190, 0),
	31, 31, TLV_DB_SCALE_ITEM(-1750, 0, 0),
	32, 34, TLV_DB_SCALE_ITEM(-1640, 100, 0),
	35, 37, TLV_DB_SCALE_ITEM(-1310, 110, 0),
	38, 39, TLV_DB_SCALE_ITEM(-990, 100, 0),
	40, 40, TLV_DB_SCALE_ITEM(-710, 0, 0),
	41, 41, TLV_DB_SCALE_ITEM(-600, 0, 0),
	42, 42, TLV_DB_SCALE_ITEM(-500, 0, 0),
	43, 43, TLV_DB_SCALE_ITEM(-340, 0, 0),
	44, 44, TLV_DB_SCALE_ITEM(-190, 0, 0),
	45, 45, TLV_DB_SCALE_ITEM(-50, 0, 0),
	46, 46, TLV_DB_SCALE_ITEM(50, 0, 0),
	47, 50, TLV_DB_SCALE_ITEM(120, 40, 0),
	51, 57, TLV_DB_SCALE_ITEM(290, 50, 0),
	58, 58, TLV_DB_SCALE_ITEM(650, 0, 0),
	59, 62, TLV_DB_SCALE_ITEM(700, 60, 0),
	63, 63, TLV_DB_SCALE_ITEM(950, 0, 0)
);

static const struct snd_kcontrol_new max9768_volume[] = {
	SOC_SINGLE_TLV("Playback Volume", MAX9768_VOL, 0, 63, 0, volume_tlv),
};

static const struct snd_kcontrol_new max9768_mute[] = {
	SOC_SINGLE_BOOL_EXT("Playback Switch", 0, max9768_get_gpio, max9768_set_gpio),
};

static const struct snd_soc_dapm_widget max9768_dapm_widgets[] = {
SND_SOC_DAPM_INPUT("IN"),

SND_SOC_DAPM_OUTPUT("OUT+"),
SND_SOC_DAPM_OUTPUT("OUT-"),
};

static const struct snd_soc_dapm_route max9768_dapm_routes[] = {
	{ "OUT+", NULL, "IN" },
	{ "OUT-", NULL, "IN" },
};

static int max9768_probe(struct snd_soc_component *component)
{
	struct max9768 *max9768 = snd_soc_component_get_drvdata(component);
	int ret;

	if (max9768->flags & MAX9768_FLAG_CLASSIC_PWM) {
		ret = regmap_write(max9768->regmap, MAX9768_CTRL,
			MAX9768_CTRL_PWM);
		if (ret)
			return ret;
	}

	if (gpio_is_valid(max9768->mute_gpio)) {
		ret = snd_soc_add_component_controls(component, max9768_mute,
				ARRAY_SIZE(max9768_mute));
		if (ret)
			return ret;
	}

	return 0;
}

static struct snd_soc_component_driver max9768_component_driver = {
	.probe = max9768_probe,
	.controls = max9768_volume,
	.num_controls = ARRAY_SIZE(max9768_volume),
	.dapm_widgets = max9768_dapm_widgets,
	.num_dapm_widgets = ARRAY_SIZE(max9768_dapm_widgets),
	.dapm_routes = max9768_dapm_routes,
	.num_dapm_routes = ARRAY_SIZE(max9768_dapm_routes),
};

static const struct regmap_config max9768_i2c_regmap_config = {
	.reg_bits = 2,
	.val_bits = 6,
	.max_register = 3,
	.reg_defaults = max9768_default_regs,
	.num_reg_defaults = ARRAY_SIZE(max9768_default_regs),
	.cache_type = REGCACHE_RBTREE,
};

static int max9768_i2c_probe(struct i2c_client *client,
			     const struct i2c_device_id *id)
{
	struct max9768 *max9768;
	struct max9768_pdata *pdata = client->dev.platform_data;
	int err;

	max9768 = devm_kzalloc(&client->dev, sizeof(*max9768), GFP_KERNEL);
	if (!max9768)
		return -ENOMEM;

	if (pdata) {
		/* Mute on powerup to avoid clicks */
		err = devm_gpio_request_one(&client->dev, pdata->mute_gpio,
				GPIOF_INIT_HIGH, "MAX9768 Mute");
		max9768->mute_gpio = err ?: pdata->mute_gpio;

		/* Activate chip by releasing shutdown, enables I2C */
		err = devm_gpio_request_one(&client->dev, pdata->shdn_gpio,
				GPIOF_INIT_HIGH, "MAX9768 Shutdown");
		max9768->shdn_gpio = err ?: pdata->shdn_gpio;

		max9768->flags = pdata->flags;
	} else {
		max9768->shdn_gpio = -EINVAL;
		max9768->mute_gpio = -EINVAL;
	}

	i2c_set_clientdata(client, max9768);

	max9768->regmap = devm_regmap_init_i2c(client, &max9768_i2c_regmap_config);
	if (IS_ERR(max9768->regmap))
		return PTR_ERR(max9768->regmap);

	return devm_snd_soc_register_component(&client->dev,
		&max9768_component_driver, NULL, 0);
}

static const struct i2c_device_id max9768_i2c_id[] = {
	{ "max9768", 0 },
	{ }
};
MODULE_DEVICE_TABLE(i2c, max9768_i2c_id);

static struct i2c_driver max9768_i2c_driver = {
	.driver = {
		.name = "max9768",
	},
	.probe = max9768_i2c_probe,
	.id_table = max9768_i2c_id,
};
module_i2c_driver(max9768_i2c_driver);

MODULE_AUTHOR("Wolfram Sang <w.sang@pengutronix.de>");
MODULE_DESCRIPTION("ASoC MAX9768 amplifier driver");
MODULE_LICENSE("GPL v2");
Commit	Line	Data
394d2bba WS	1	/*
	2	* MAX9768 AMP driver
	3	*
	4	* Copyright (C) 2011, 2012 by Wolfram Sang, Pengutronix e.K.
	5	*
	6	* This program is free software; you can redistribute it and/or modify it
	7	* under the terms of the GNU General Public License as published by the
	8	* Free Software Foundation; version 2 of the License.
	9	*/
	10
	11	#include <linux/init.h>
	12	#include <linux/module.h>
	13	#include <linux/i2c.h>
	14	#include <linux/slab.h>
	15	#include <linux/gpio.h>
	16	#include <linux/regmap.h>
	17
	18	#include <sound/core.h>
	19	#include <sound/soc.h>
	20	#include <sound/tlv.h>
	21	#include <sound/max9768.h>
	22
	23	/* "Registers" */
	24	#define MAX9768_VOL 0
	25	#define MAX9768_CTRL 3
	26
	27	/* Commands */
	28	#define MAX9768_CTRL_PWM 0x15
	29	#define MAX9768_CTRL_FILTERLESS 0x16
	30
	31	struct max9768 {
	32	struct regmap *regmap;
	33	int mute_gpio;
	34	int shdn_gpio;
	35	u32 flags;
	36	};
	37
c418a84a	38	static const struct reg_default max9768_default_regs[] = {
394d2bba WS	39	{ 0, 0 },
	40	{ 3, MAX9768_CTRL_FILTERLESS},
	41	};
	42
	43	static int max9768_get_gpio(struct snd_kcontrol *kcontrol,
	44	struct snd_ctl_elem_value *ucontrol)
	45	{
04b5cbd8 LPC	46	struct snd_soc_component *c = snd_soc_kcontrol_component(kcontrol);
04b5cbd8 LPC	47	struct max9768 *max9768 = snd_soc_component_get_drvdata(c);
394d2bba WS	48	int val = gpio_get_value_cansleep(max9768->mute_gpio);
	49
	50	ucontrol->value.integer.value[0] = !val;
	51
	52	return 0;
	53	}
	54
	55	static int max9768_set_gpio(struct snd_kcontrol *kcontrol,
	56	struct snd_ctl_elem_value *ucontrol)
	57	{
04b5cbd8 LPC	58	struct snd_soc_component *c = snd_soc_kcontrol_component(kcontrol);
04b5cbd8 LPC	59	struct max9768 *max9768 = snd_soc_component_get_drvdata(c);
394d2bba WS	60
	61	gpio_set_value_cansleep(max9768->mute_gpio, !ucontrol->value.integer.value[0]);
	62
	63	return 0;
	64	}
	65
44744eec	66	static const DECLARE_TLV_DB_RANGE(volume_tlv,
394d2bba WS	67	0, 0, TLV_DB_SCALE_ITEM(-16150, 0, 0),
	68	1, 1, TLV_DB_SCALE_ITEM(-9280, 0, 0),
	69	2, 2, TLV_DB_SCALE_ITEM(-9030, 0, 0),
	70	3, 3, TLV_DB_SCALE_ITEM(-8680, 0, 0),
	71	4, 4, TLV_DB_SCALE_ITEM(-8430, 0, 0),
	72	5, 5, TLV_DB_SCALE_ITEM(-8080, 0, 0),
	73	6, 6, TLV_DB_SCALE_ITEM(-7830, 0, 0),
	74	7, 7, TLV_DB_SCALE_ITEM(-7470, 0, 0),
	75	8, 8, TLV_DB_SCALE_ITEM(-7220, 0, 0),
	76	9, 9, TLV_DB_SCALE_ITEM(-6870, 0, 0),
	77	10, 10, TLV_DB_SCALE_ITEM(-6620, 0, 0),
	78	11, 11, TLV_DB_SCALE_ITEM(-6270, 0, 0),
	79	12, 12, TLV_DB_SCALE_ITEM(-6020, 0, 0),
	80	13, 13, TLV_DB_SCALE_ITEM(-5670, 0, 0),
	81	14, 14, TLV_DB_SCALE_ITEM(-5420, 0, 0),
	82	15, 17, TLV_DB_SCALE_ITEM(-5060, 250, 0),
	83	18, 18, TLV_DB_SCALE_ITEM(-4370, 0, 0),
	84	19, 19, TLV_DB_SCALE_ITEM(-4210, 0, 0),
	85	20, 20, TLV_DB_SCALE_ITEM(-3960, 0, 0),
	86	21, 21, TLV_DB_SCALE_ITEM(-3760, 0, 0),
	87	22, 22, TLV_DB_SCALE_ITEM(-3600, 0, 0),
	88	23, 23, TLV_DB_SCALE_ITEM(-3340, 0, 0),
	89	24, 24, TLV_DB_SCALE_ITEM(-3150, 0, 0),
	90	25, 25, TLV_DB_SCALE_ITEM(-2980, 0, 0),
	91	26, 26, TLV_DB_SCALE_ITEM(-2720, 0, 0),
	92	27, 27, TLV_DB_SCALE_ITEM(-2520, 0, 0),
	93	28, 30, TLV_DB_SCALE_ITEM(-2350, 190, 0),
	94	31, 31, TLV_DB_SCALE_ITEM(-1750, 0, 0),
	95	32, 34, TLV_DB_SCALE_ITEM(-1640, 100, 0),
	96	35, 37, TLV_DB_SCALE_ITEM(-1310, 110, 0),
	97	38, 39, TLV_DB_SCALE_ITEM(-990, 100, 0),
	98	40, 40, TLV_DB_SCALE_ITEM(-710, 0, 0),
	99	41, 41, TLV_DB_SCALE_ITEM(-600, 0, 0),
	100	42, 42, TLV_DB_SCALE_ITEM(-500, 0, 0),
	101	43, 43, TLV_DB_SCALE_ITEM(-340, 0, 0),
	102	44, 44, TLV_DB_SCALE_ITEM(-190, 0, 0),
	103	45, 45, TLV_DB_SCALE_ITEM(-50, 0, 0),
	104	46, 46, TLV_DB_SCALE_ITEM(50, 0, 0),
	105	47, 50, TLV_DB_SCALE_ITEM(120, 40, 0),
	106	51, 57, TLV_DB_SCALE_ITEM(290, 50, 0),
	107	58, 58, TLV_DB_SCALE_ITEM(650, 0, 0),
	108	59, 62, TLV_DB_SCALE_ITEM(700, 60, 0),
44744eec LPC	109	63, 63, TLV_DB_SCALE_ITEM(950, 0, 0)
44744eec LPC	110	);
394d2bba WS	111
	112	static const struct snd_kcontrol_new max9768_volume[] = {
	113	SOC_SINGLE_TLV("Playback Volume", MAX9768_VOL, 0, 63, 0, volume_tlv),
	114	};
	115
	116	static const struct snd_kcontrol_new max9768_mute[] = {
69edea8a	117	SOC_SINGLE_BOOL_EXT("Playback Switch", 0, max9768_get_gpio, max9768_set_gpio),
394d2bba WS	118	};
394d2bba WS	119
439fe8a7 MB	120	static const struct snd_soc_dapm_widget max9768_dapm_widgets[] = {
	121	SND_SOC_DAPM_INPUT("IN"),
	122
	123	SND_SOC_DAPM_OUTPUT("OUT+"),
	124	SND_SOC_DAPM_OUTPUT("OUT-"),
	125	};
	126
	127	static const struct snd_soc_dapm_route max9768_dapm_routes[] = {
	128	{ "OUT+", NULL, "IN" },
	129	{ "OUT-", NULL, "IN" },
	130	};
	131
04b5cbd8	132	static int max9768_probe(struct snd_soc_component *component)
394d2bba	133	{
04b5cbd8	134	struct max9768 *max9768 = snd_soc_component_get_drvdata(component);
394d2bba WS	135	int ret;
394d2bba WS	136
394d2bba	137	if (max9768->flags & MAX9768_FLAG_CLASSIC_PWM) {
04b5cbd8 LPC	138	ret = regmap_write(max9768->regmap, MAX9768_CTRL,
04b5cbd8 LPC	139	MAX9768_CTRL_PWM);
394d2bba WS	140	if (ret)
	141	return ret;
	142	}
	143
	144	if (gpio_is_valid(max9768->mute_gpio)) {
04b5cbd8	145	ret = snd_soc_add_component_controls(component, max9768_mute,
394d2bba WS	146	ARRAY_SIZE(max9768_mute));
	147	if (ret)
	148	return ret;
	149	}
	150
	151	return 0;
	152	}
	153
04b5cbd8	154	static struct snd_soc_component_driver max9768_component_driver = {
394d2bba WS	155	.probe = max9768_probe,
	156	.controls = max9768_volume,
	157	.num_controls = ARRAY_SIZE(max9768_volume),
439fe8a7 MB	158	.dapm_widgets = max9768_dapm_widgets,
	159	.num_dapm_widgets = ARRAY_SIZE(max9768_dapm_widgets),
	160	.dapm_routes = max9768_dapm_routes,
	161	.num_dapm_routes = ARRAY_SIZE(max9768_dapm_routes),
394d2bba WS	162	};
394d2bba WS	163
394d2bba WS	164	static const struct regmap_config max9768_i2c_regmap_config = {
	165	.reg_bits = 2,
	166	.val_bits = 6,
	167	.max_register = 3,
	168	.reg_defaults = max9768_default_regs,
	169	.num_reg_defaults = ARRAY_SIZE(max9768_default_regs),
394d2bba WS	170	.cache_type = REGCACHE_RBTREE,
	171	};
	172
7a79e94e BP	173	static int max9768_i2c_probe(struct i2c_client *client,
7a79e94e BP	174	const struct i2c_device_id *id)
394d2bba WS	175	{
	176	struct max9768 *max9768;
	177	struct max9768_pdata *pdata = client->dev.platform_data;
	178	int err;
	179
	180	max9768 = devm_kzalloc(&client->dev, sizeof(*max9768), GFP_KERNEL);
	181	if (!max9768)
	182	return -ENOMEM;
	183
	184	if (pdata) {
	185	/* Mute on powerup to avoid clicks */
d79cca1a LPC	186	err = devm_gpio_request_one(&client->dev, pdata->mute_gpio,
d79cca1a LPC	187	GPIOF_INIT_HIGH, "MAX9768 Mute");
394d2bba WS	188	max9768->mute_gpio = err ?: pdata->mute_gpio;
	189
	190	/* Activate chip by releasing shutdown, enables I2C */
d79cca1a LPC	191	err = devm_gpio_request_one(&client->dev, pdata->shdn_gpio,
d79cca1a LPC	192	GPIOF_INIT_HIGH, "MAX9768 Shutdown");
394d2bba WS	193	max9768->shdn_gpio = err ?: pdata->shdn_gpio;
	194
	195	max9768->flags = pdata->flags;
	196	} else {
	197	max9768->shdn_gpio = -EINVAL;
	198	max9768->mute_gpio = -EINVAL;
	199	}
	200
	201	i2c_set_clientdata(client, max9768);
	202
8f255e7b	203	max9768->regmap = devm_regmap_init_i2c(client, &max9768_i2c_regmap_config);
d79cca1a LPC	204	if (IS_ERR(max9768->regmap))
d79cca1a LPC	205	return PTR_ERR(max9768->regmap);
394d2bba	206
04b5cbd8 LPC	207	return devm_snd_soc_register_component(&client->dev,
04b5cbd8 LPC	208	&max9768_component_driver, NULL, 0);
394d2bba WS	209	}
	210
	211	static const struct i2c_device_id max9768_i2c_id[] = {
	212	{ "max9768", 0 },
	213	{ }
	214	};
	215	MODULE_DEVICE_TABLE(i2c, max9768_i2c_id);
	216
	217	static struct i2c_driver max9768_i2c_driver = {
	218	.driver = {
	219	.name = "max9768",
394d2bba WS	220	},
394d2bba WS	221	.probe = max9768_i2c_probe,
394d2bba WS	222	.id_table = max9768_i2c_id,
	223	};
	224	module_i2c_driver(max9768_i2c_driver);
	225
	226	MODULE_AUTHOR("Wolfram Sang <w.sang@pengutronix.de>");
	227	MODULE_DESCRIPTION("ASoC MAX9768 amplifier driver");
	228	MODULE_LICENSE("GPL v2");