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/*
* arizona-micsupp.c -- Microphone supply for Arizona devices
*
* Copyright 2012 Wolfson Microelectronics PLC.
*
* Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
*
* 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; either version 2 of the License, or (at your
* option) any later version.
*/
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/init.h>
#include <linux/bitops.h>
#include <linux/err.h>
#include <linux/platform_device.h>
#include <linux/regulator/driver.h>
#include <linux/regulator/machine.h>
#include <linux/regulator/of_regulator.h>
#include <linux/gpio.h>
#include <linux/slab.h>
#include <linux/workqueue.h>
#include <sound/soc.h>
#include <linux/mfd/arizona/core.h>
#include <linux/mfd/arizona/pdata.h>
#include <linux/mfd/arizona/registers.h>
struct arizona_micsupp {
struct regulator_dev *regulator;
struct arizona *arizona;
struct regulator_consumer_supply supply;
struct regulator_init_data init_data;
struct work_struct check_cp_work;
};
static void arizona_micsupp_check_cp(struct work_struct *work)
{
struct arizona_micsupp *micsupp =
container_of(work, struct arizona_micsupp, check_cp_work);
struct snd_soc_dapm_context *dapm = micsupp->arizona->dapm;
struct arizona *arizona = micsupp->arizona;
struct regmap *regmap = arizona->regmap;
unsigned int reg;
int ret;
ret = regmap_read(regmap, ARIZONA_MIC_CHARGE_PUMP_1, ®);
if (ret != 0) {
dev_err(arizona->dev, "Failed to read CP state: %d\n", ret);
return;
}
if (dapm) {
if ((reg & (ARIZONA_CPMIC_ENA | ARIZONA_CPMIC_BYPASS)) ==
ARIZONA_CPMIC_ENA)
snd_soc_dapm_force_enable_pin(dapm, "MICSUPP");
else
snd_soc_dapm_disable_pin(dapm, "MICSUPP");
snd_soc_dapm_sync(dapm);
}
}
static int arizona_micsupp_enable(struct regulator_dev *rdev)
{
struct arizona_micsupp *micsupp = rdev_get_drvdata(rdev);
int ret;
ret = regulator_enable_regmap(rdev);
if (ret == 0)
schedule_work(&micsupp->check_cp_work);
return ret;
}
static int arizona_micsupp_disable(struct regulator_dev *rdev)
{
struct arizona_micsupp *micsupp = rdev_get_drvdata(rdev);
int ret;
ret = regulator_disable_regmap(rdev);
if (ret == 0)
schedule_work(&micsupp->check_cp_work);
return ret;
}
static int arizona_micsupp_set_bypass(struct regulator_dev *rdev, bool ena)
{
struct arizona_micsupp *micsupp = rdev_get_drvdata(rdev);
int ret;
ret = regulator_set_bypass_regmap(rdev, ena);
if (ret == 0)
schedule_work(&micsupp->check_cp_work);
return ret;
}
static struct regulator_ops arizona_micsupp_ops = {
.enable = arizona_micsupp_enable,
.disable = arizona_micsupp_disable,
.is_enabled = regulator_is_enabled_regmap,
.list_voltage = regulator_list_voltage_linear_range,
.map_voltage = regulator_map_voltage_linear_range,
.get_voltage_sel = regulator_get_voltage_sel_regmap,
.set_voltage_sel = regulator_set_voltage_sel_regmap,
.get_bypass = regulator_get_bypass_regmap,
.set_bypass = arizona_micsupp_set_bypass,
};
static const struct regulator_linear_range arizona_micsupp_ranges[] = {
REGULATOR_LINEAR_RANGE(1700000, 0, 0x1e, 50000),
REGULATOR_LINEAR_RANGE(3300000, 0x1f, 0x1f, 0),
};
static const struct regulator_desc arizona_micsupp = {
.name = "MICVDD",
.supply_name = "CPVDD",
.type = REGULATOR_VOLTAGE,
.n_voltages = 32,
.ops = &arizona_micsupp_ops,
.vsel_reg = ARIZONA_LDO2_CONTROL_1,
.vsel_mask = ARIZONA_LDO2_VSEL_MASK,
.enable_reg = ARIZONA_MIC_CHARGE_PUMP_1,
.enable_mask = ARIZONA_CPMIC_ENA,
.bypass_reg = ARIZONA_MIC_CHARGE_PUMP_1,
.bypass_mask = ARIZONA_CPMIC_BYPASS,
.linear_ranges = arizona_micsupp_ranges,
.n_linear_ranges = ARRAY_SIZE(arizona_micsupp_ranges),
.enable_time = 3000,
.owner = THIS_MODULE,
};
static const struct regulator_linear_range arizona_micsupp_ext_ranges[] = {
REGULATOR_LINEAR_RANGE(900000, 0, 0x14, 25000),
REGULATOR_LINEAR_RANGE(1500000, 0x15, 0x27, 100000),
};
static const struct regulator_desc arizona_micsupp_ext = {
.name = "MICVDD",
.supply_name = "CPVDD",
.type = REGULATOR_VOLTAGE,
.n_voltages = 40,
.ops = &arizona_micsupp_ops,
.vsel_reg = ARIZONA_LDO2_CONTROL_1,
.vsel_mask = ARIZONA_LDO2_VSEL_MASK,
.enable_reg = ARIZONA_MIC_CHARGE_PUMP_1,
.enable_mask = ARIZONA_CPMIC_ENA,
.bypass_reg = ARIZONA_MIC_CHARGE_PUMP_1,
.bypass_mask = ARIZONA_CPMIC_BYPASS,
.linear_ranges = arizona_micsupp_ext_ranges,
.n_linear_ranges = ARRAY_SIZE(arizona_micsupp_ext_ranges),
.enable_time = 3000,
.owner = THIS_MODULE,
};
static const struct regulator_init_data arizona_micsupp_default = {
.constraints = {
.valid_ops_mask = REGULATOR_CHANGE_STATUS |
REGULATOR_CHANGE_VOLTAGE |
REGULATOR_CHANGE_BYPASS,
.min_uV = 1700000,
.max_uV = 3300000,
},
.num_consumer_supplies = 1,
};
static const struct regulator_init_data arizona_micsupp_ext_default = {
.constraints = {
.valid_ops_mask = REGULATOR_CHANGE_STATUS |
REGULATOR_CHANGE_VOLTAGE |
REGULATOR_CHANGE_BYPASS,
.min_uV = 900000,
.max_uV = 3300000,
},
.num_consumer_supplies = 1,
};
static int arizona_micsupp_of_get_pdata(struct arizona *arizona,
struct regulator_config *config)
{
struct arizona_pdata *pdata = &arizona->pdata;
struct arizona_micsupp *micsupp = config->driver_data;
struct device_node *np;
struct regulator_init_data *init_data;
np = of_get_child_by_name(arizona->dev->of_node, "micvdd");
if (np) {
config->of_node = np;
init_data = of_get_regulator_init_data(arizona->dev, np);
if (init_data) {
init_data->consumer_supplies = &micsupp->supply;
init_data->num_consumer_supplies = 1;
pdata->micvdd = init_data;
}
}
return 0;
}
static int arizona_micsupp_probe(struct platform_device *pdev)
{
struct arizona *arizona = dev_get_drvdata(pdev->dev.parent);
const struct regulator_desc *desc;
struct regulator_config config = { };
struct arizona_micsupp *micsupp;
int ret;
micsupp = devm_kzalloc(&pdev->dev, sizeof(*micsupp), GFP_KERNEL);
if (!micsupp)
return -ENOMEM;
micsupp->arizona = arizona;
INIT_WORK(&micsupp->check_cp_work, arizona_micsupp_check_cp);
/*
* Since the chip usually supplies itself we provide some
* default init_data for it. This will be overridden with
* platform data if provided.
*/
switch (arizona->type) {
case WM5110:
desc = &arizona_micsupp_ext;
micsupp->init_data = arizona_micsupp_ext_default;
break;
default:
desc = &arizona_micsupp;
micsupp->init_data = arizona_micsupp_default;
break;
}
micsupp->init_data.consumer_supplies = &micsupp->supply;
micsupp->supply.supply = "MICVDD";
micsupp->supply.dev_name = dev_name(arizona->dev);
config.dev = arizona->dev;
config.driver_data = micsupp;
config.regmap = arizona->regmap;
if (IS_ENABLED(CONFIG_OF)) {
if (!dev_get_platdata(arizona->dev)) {
ret = arizona_micsupp_of_get_pdata(arizona, &config);
if (ret < 0)
return ret;
}
}
if (arizona->pdata.micvdd)
config.init_data = arizona->pdata.micvdd;
else
config.init_data = &micsupp->init_data;
/* Default to regulated mode until the API supports bypass */
regmap_update_bits(arizona->regmap, ARIZONA_MIC_CHARGE_PUMP_1,
ARIZONA_CPMIC_BYPASS, 0);
micsupp->regulator = devm_regulator_register(&pdev->dev,
desc,
&config);
if (IS_ERR(micsupp->regulator)) {
ret = PTR_ERR(micsupp->regulator);
dev_err(arizona->dev, "Failed to register mic supply: %d\n",
ret);
return ret;
}
of_node_put(config.of_node);
platform_set_drvdata(pdev, micsupp);
return 0;
}
static struct platform_driver arizona_micsupp_driver = {
.probe = arizona_micsupp_probe,
.driver = {
.name = "arizona-micsupp",
.owner = THIS_MODULE,
},
};
module_platform_driver(arizona_micsupp_driver);
/* Module information */
MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
MODULE_DESCRIPTION("Arizona microphone supply driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:arizona-micsupp");
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