261 строка
7.0 KiB
C
261 строка
7.0 KiB
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");
|