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android_kernel_motorola_sm6225/sound/soc/codecs/max9768.c
Mark Brown 69edea8a50 ASoC: max9768: Fix up review comments in max9768 driver 
The Mute Switch should be called Playback Switch to match the volume
and the regmap core has been updated so we don't need to mark all the
registers as non-volatile.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Wolfram Sang <w.sang@pengutronix.de>
2012-01-31 11:15:46 +00:00

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/*
* 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 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_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),
};
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 __devinit 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 = 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_regmap_free;
return 0;
err_regmap_free:
regmap_exit(max9768->regmap);
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 __devexit max9768_i2c_remove(struct i2c_client *client)
{
struct max9768 *max9768 = i2c_get_clientdata(client);
snd_soc_unregister_codec(&client->dev);
regmap_exit(max9768->regmap);
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 = __devexit_p(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");
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