[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 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_codec *codec = snd_kcontrol_chip(kcontrol);
	struct max9768 *max9768 = snd_soc_codec_get_drvdata(codec);
	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_codec *codec = snd_kcontrol_chip(kcontrol);
	struct max9768 *max9768 = snd_soc_codec_get_drvdata(codec);

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

	return 0;
}

static const unsigned int volume_tlv[] = {
	TLV_DB_RANGE_HEAD(43),
	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_codec *codec)
{
	struct max9768 *max9768 = snd_soc_codec_get_drvdata(codec);
	int ret;

	codec->control_data = max9768->regmap;
	ret = snd_soc_codec_set_cache_io(codec, 2, 6, SND_SOC_REGMAP);
	if (ret)
		return ret;

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

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

	return 0;
}

static struct snd_soc_codec_driver max9768_codec_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 = gpio_request_one(pdata->mute_gpio, GPIOF_INIT_HIGH, "MAX9768 Mute");
		max9768->mute_gpio = err ?: pdata->mute_gpio;

		/* Activate chip by releasing shutdown, enables I2C */
		err = gpio_request_one(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)) {
		err = PTR_ERR(max9768->regmap);
		goto err_gpio_free;
	}

	err = snd_soc_register_codec(&client->dev, &max9768_codec_driver, NULL, 0);
	if (err)
		goto err_gpio_free;

	return 0;

 err_gpio_free:
	if (gpio_is_valid(max9768->shdn_gpio))
		gpio_free(max9768->shdn_gpio);
	if (gpio_is_valid(max9768->mute_gpio))
		gpio_free(max9768->mute_gpio);

	return err;
}

static int max9768_i2c_remove(struct i2c_client *client)
{
	struct max9768 *max9768 = i2c_get_clientdata(client);

	snd_soc_unregister_codec(&client->dev);

	if (gpio_is_valid(max9768->shdn_gpio))
		gpio_free(max9768->shdn_gpio);
	if (gpio_is_valid(max9768->mute_gpio))
		gpio_free(max9768->mute_gpio);

	return 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",
		.owner = THIS_MODULE,
	},
	.probe = max9768_i2c_probe,
	.remove = max9768_i2c_remove,
	.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
	38	static struct reg_default max9768_default_regs[] = {
	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	{
	46	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
	47	struct max9768 *max9768 = snd_soc_codec_get_drvdata(codec);
	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	{
	58	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
	59	struct max9768 *max9768 = snd_soc_codec_get_drvdata(codec);
	60
	61	gpio_set_value_cansleep(max9768->mute_gpio, !ucontrol->value.integer.value[0]);
	62
	63	return 0;
	64	}
65
66	static const unsigned int volume_tlv[] = {
67	TLV_DB_RANGE_HEAD(43),
68	0, 0, TLV_DB_SCALE_ITEM(-16150, 0, 0),
69	1, 1, TLV_DB_SCALE_ITEM(-9280, 0, 0),
70	2, 2, TLV_DB_SCALE_ITEM(-9030, 0, 0),
71	3, 3, TLV_DB_SCALE_ITEM(-8680, 0, 0),
72	4, 4, TLV_DB_SCALE_ITEM(-8430, 0, 0),
73	5, 5, TLV_DB_SCALE_ITEM(-8080, 0, 0),
74	6, 6, TLV_DB_SCALE_ITEM(-7830, 0, 0),
75	7, 7, TLV_DB_SCALE_ITEM(-7470, 0, 0),
76	8, 8, TLV_DB_SCALE_ITEM(-7220, 0, 0),
77	9, 9, TLV_DB_SCALE_ITEM(-6870, 0, 0),
78	10, 10, TLV_DB_SCALE_ITEM(-6620, 0, 0),
79	11, 11, TLV_DB_SCALE_ITEM(-6270, 0, 0),
80	12, 12, TLV_DB_SCALE_ITEM(-6020, 0, 0),
81	13, 13, TLV_DB_SCALE_ITEM(-5670, 0, 0),
82	14, 14, TLV_DB_SCALE_ITEM(-5420, 0, 0),
83	15, 17, TLV_DB_SCALE_ITEM(-5060, 250, 0),
84	18, 18, TLV_DB_SCALE_ITEM(-4370, 0, 0),
85	19, 19, TLV_DB_SCALE_ITEM(-4210, 0, 0),
86	20, 20, TLV_DB_SCALE_ITEM(-3960, 0, 0),
87	21, 21, TLV_DB_SCALE_ITEM(-3760, 0, 0),
88	22, 22, TLV_DB_SCALE_ITEM(-3600, 0, 0),
89	23, 23, TLV_DB_SCALE_ITEM(-3340, 0, 0),
90	24, 24, TLV_DB_SCALE_ITEM(-3150, 0, 0),
91	25, 25, TLV_DB_SCALE_ITEM(-2980, 0, 0),
92	26, 26, TLV_DB_SCALE_ITEM(-2720, 0, 0),
93	27, 27, TLV_DB_SCALE_ITEM(-2520, 0, 0),
94	28, 30, TLV_DB_SCALE_ITEM(-2350, 190, 0),
95	31, 31, TLV_DB_SCALE_ITEM(-1750, 0, 0),
96	32, 34, TLV_DB_SCALE_ITEM(-1640, 100, 0),
97	35, 37, TLV_DB_SCALE_ITEM(-1310, 110, 0),
98	38, 39, TLV_DB_SCALE_ITEM(-990, 100, 0),
99	40, 40, TLV_DB_SCALE_ITEM(-710, 0, 0),
100	41, 41, TLV_DB_SCALE_ITEM(-600, 0, 0),
101	42, 42, TLV_DB_SCALE_ITEM(-500, 0, 0),
102	43, 43, TLV_DB_SCALE_ITEM(-340, 0, 0),
103	44, 44, TLV_DB_SCALE_ITEM(-190, 0, 0),
104	45, 45, TLV_DB_SCALE_ITEM(-50, 0, 0),
105	46, 46, TLV_DB_SCALE_ITEM(50, 0, 0),
106	47, 50, TLV_DB_SCALE_ITEM(120, 40, 0),
107	51, 57, TLV_DB_SCALE_ITEM(290, 50, 0),
108	58, 58, TLV_DB_SCALE_ITEM(650, 0, 0),
109	59, 62, TLV_DB_SCALE_ITEM(700, 60, 0),
110	63, 63, TLV_DB_SCALE_ITEM(950, 0, 0),
111	};
112
113	static const struct snd_kcontrol_new max9768_volume[] = {
114	SOC_SINGLE_TLV("Playback Volume", MAX9768_VOL, 0, 63, 0, volume_tlv),
115	};
116
117	static const struct snd_kcontrol_new max9768_mute[] = {
69edea8a	118	SOC_SINGLE_BOOL_EXT("Playback Switch", 0, max9768_get_gpio, max9768_set_gpio),
394d2bba WS	119	};
394d2bba WS	120
439fe8a7 MB	121	static const struct snd_soc_dapm_widget max9768_dapm_widgets[] = {
	122	SND_SOC_DAPM_INPUT("IN"),
	123
	124	SND_SOC_DAPM_OUTPUT("OUT+"),
	125	SND_SOC_DAPM_OUTPUT("OUT-"),
	126	};
	127
	128	static const struct snd_soc_dapm_route max9768_dapm_routes[] = {
	129	{ "OUT+", NULL, "IN" },
	130	{ "OUT-", NULL, "IN" },
	131	};
	132
394d2bba WS	133	static int max9768_probe(struct snd_soc_codec *codec)
	134	{
	135	struct max9768 *max9768 = snd_soc_codec_get_drvdata(codec);
	136	int ret;
	137
	138	codec->control_data = max9768->regmap;
	139	ret = snd_soc_codec_set_cache_io(codec, 2, 6, SND_SOC_REGMAP);
	140	if (ret)
	141	return ret;
	142
	143	if (max9768->flags & MAX9768_FLAG_CLASSIC_PWM) {
	144	ret = snd_soc_write(codec, MAX9768_CTRL, MAX9768_CTRL_PWM);
	145	if (ret)
	146	return ret;
	147	}
	148
	149	if (gpio_is_valid(max9768->mute_gpio)) {
14ac9112	150	ret = snd_soc_add_codec_controls(codec, max9768_mute,
394d2bba WS	151	ARRAY_SIZE(max9768_mute));
	152	if (ret)
	153	return ret;
	154	}
	155
	156	return 0;
	157	}
	158
	159	static struct snd_soc_codec_driver max9768_codec_driver = {
	160	.probe = max9768_probe,
	161	.controls = max9768_volume,
	162	.num_controls = ARRAY_SIZE(max9768_volume),
439fe8a7 MB	163	.dapm_widgets = max9768_dapm_widgets,
	164	.num_dapm_widgets = ARRAY_SIZE(max9768_dapm_widgets),
	165	.dapm_routes = max9768_dapm_routes,
	166	.num_dapm_routes = ARRAY_SIZE(max9768_dapm_routes),
394d2bba WS	167	};
394d2bba WS	168
394d2bba WS	169	static const struct regmap_config max9768_i2c_regmap_config = {
	170	.reg_bits = 2,
	171	.val_bits = 6,
	172	.max_register = 3,
	173	.reg_defaults = max9768_default_regs,
	174	.num_reg_defaults = ARRAY_SIZE(max9768_default_regs),
394d2bba WS	175	.cache_type = REGCACHE_RBTREE,
	176	};
	177
7a79e94e BP	178	static int max9768_i2c_probe(struct i2c_client *client,
7a79e94e BP	179	const struct i2c_device_id *id)
394d2bba WS	180	{
	181	struct max9768 *max9768;
	182	struct max9768_pdata *pdata = client->dev.platform_data;
	183	int err;
	184
	185	max9768 = devm_kzalloc(&client->dev, sizeof(*max9768), GFP_KERNEL);
	186	if (!max9768)
	187	return -ENOMEM;
	188
	189	if (pdata) {
	190	/* Mute on powerup to avoid clicks */
	191	err = gpio_request_one(pdata->mute_gpio, GPIOF_INIT_HIGH, "MAX9768 Mute");
	192	max9768->mute_gpio = err ?: pdata->mute_gpio;
	193
	194	/* Activate chip by releasing shutdown, enables I2C */
	195	err = gpio_request_one(pdata->shdn_gpio, GPIOF_INIT_HIGH, "MAX9768 Shutdown");
	196	max9768->shdn_gpio = err ?: pdata->shdn_gpio;
	197
	198	max9768->flags = pdata->flags;
	199	} else {
	200	max9768->shdn_gpio = -EINVAL;
	201	max9768->mute_gpio = -EINVAL;
	202	}
	203
	204	i2c_set_clientdata(client, max9768);
	205
8f255e7b	206	max9768->regmap = devm_regmap_init_i2c(client, &max9768_i2c_regmap_config);
394d2bba WS	207	if (IS_ERR(max9768->regmap)) {
	208	err = PTR_ERR(max9768->regmap);
	209	goto err_gpio_free;
	210	}
	211
	212	err = snd_soc_register_codec(&client->dev, &max9768_codec_driver, NULL, 0);
	213	if (err)
8f255e7b	214	goto err_gpio_free;
394d2bba WS	215
	216	return 0;
	217
394d2bba WS	218	err_gpio_free:
	219	if (gpio_is_valid(max9768->shdn_gpio))
	220	gpio_free(max9768->shdn_gpio);
	221	if (gpio_is_valid(max9768->mute_gpio))
	222	gpio_free(max9768->mute_gpio);
	223
	224	return err;
	225	}
	226
7a79e94e	227	static int max9768_i2c_remove(struct i2c_client *client)
394d2bba WS	228	{
	229	struct max9768 *max9768 = i2c_get_clientdata(client);
	230
	231	snd_soc_unregister_codec(&client->dev);
394d2bba WS	232
	233	if (gpio_is_valid(max9768->shdn_gpio))
	234	gpio_free(max9768->shdn_gpio);
	235	if (gpio_is_valid(max9768->mute_gpio))
	236	gpio_free(max9768->mute_gpio);
	237
	238	return 0;
	239	}
	240
	241	static const struct i2c_device_id max9768_i2c_id[] = {
	242	{ "max9768", 0 },
	243	{ }
	244	};
	245	MODULE_DEVICE_TABLE(i2c, max9768_i2c_id);
	246
	247	static struct i2c_driver max9768_i2c_driver = {
	248	.driver = {
	249	.name = "max9768",
	250	.owner = THIS_MODULE,
	251	},
	252	.probe = max9768_i2c_probe,
7a79e94e	253	.remove = max9768_i2c_remove,
394d2bba WS	254	.id_table = max9768_i2c_id,
	255	};
	256	module_i2c_driver(max9768_i2c_driver);
	257
	258	MODULE_AUTHOR("Wolfram Sang <w.sang@pengutronix.de>");
	259	MODULE_DESCRIPTION("ASoC MAX9768 amplifier driver");
	260	MODULE_LICENSE("GPL v2");