sound/soc/codecs/max9768.c - kernel/quantenna - Git at Google

 /*
  * 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");
	/*
	* 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");