317 lines
7.9 KiB
C
317 lines
7.9 KiB
C
/*
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* arizona-micsupp.c -- Microphone supply for Arizona devices
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*
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* Copyright 2012 Wolfson Microelectronics PLC.
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*
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* Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*/
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#include <linux/module.h>
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#include <linux/moduleparam.h>
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#include <linux/init.h>
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#include <linux/bitops.h>
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#include <linux/err.h>
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#include <linux/of.h>
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#include <linux/platform_device.h>
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#include <linux/regulator/driver.h>
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#include <linux/regulator/machine.h>
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#include <linux/regulator/of_regulator.h>
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#include <linux/gpio.h>
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#include <linux/slab.h>
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#include <linux/workqueue.h>
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#include <sound/soc.h>
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#include <linux/mfd/arizona/core.h>
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#include <linux/mfd/arizona/pdata.h>
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#include <linux/mfd/arizona/registers.h>
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struct arizona_micsupp {
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struct regulator_dev *regulator;
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struct arizona *arizona;
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struct regulator_consumer_supply supply;
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struct regulator_init_data init_data;
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struct work_struct check_cp_work;
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};
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static void arizona_micsupp_check_cp(struct work_struct *work)
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{
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struct arizona_micsupp *micsupp =
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container_of(work, struct arizona_micsupp, check_cp_work);
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struct snd_soc_dapm_context *dapm = micsupp->arizona->dapm;
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struct arizona *arizona = micsupp->arizona;
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struct regmap *regmap = arizona->regmap;
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unsigned int reg;
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int ret;
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ret = regmap_read(regmap, ARIZONA_MIC_CHARGE_PUMP_1, ®);
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if (ret != 0) {
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dev_err(arizona->dev, "Failed to read CP state: %d\n", ret);
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return;
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}
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if (dapm) {
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if ((reg & (ARIZONA_CPMIC_ENA | ARIZONA_CPMIC_BYPASS)) ==
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ARIZONA_CPMIC_ENA)
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snd_soc_dapm_force_enable_pin(dapm, "MICSUPP");
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else
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snd_soc_dapm_disable_pin(dapm, "MICSUPP");
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snd_soc_dapm_sync(dapm);
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}
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}
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static int arizona_micsupp_enable(struct regulator_dev *rdev)
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{
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struct arizona_micsupp *micsupp = rdev_get_drvdata(rdev);
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int ret;
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ret = regulator_enable_regmap(rdev);
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if (ret == 0)
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schedule_work(&micsupp->check_cp_work);
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return ret;
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}
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static int arizona_micsupp_disable(struct regulator_dev *rdev)
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{
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struct arizona_micsupp *micsupp = rdev_get_drvdata(rdev);
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int ret;
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ret = regulator_disable_regmap(rdev);
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if (ret == 0)
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schedule_work(&micsupp->check_cp_work);
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return ret;
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}
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static int arizona_micsupp_set_bypass(struct regulator_dev *rdev, bool ena)
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{
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struct arizona_micsupp *micsupp = rdev_get_drvdata(rdev);
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int ret;
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ret = regulator_set_bypass_regmap(rdev, ena);
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if (ret == 0)
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schedule_work(&micsupp->check_cp_work);
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return ret;
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}
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static struct regulator_ops arizona_micsupp_ops = {
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.enable = arizona_micsupp_enable,
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.disable = arizona_micsupp_disable,
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.is_enabled = regulator_is_enabled_regmap,
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.list_voltage = regulator_list_voltage_linear_range,
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.map_voltage = regulator_map_voltage_linear_range,
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.get_voltage_sel = regulator_get_voltage_sel_regmap,
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.set_voltage_sel = regulator_set_voltage_sel_regmap,
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.get_bypass = regulator_get_bypass_regmap,
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.set_bypass = arizona_micsupp_set_bypass,
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};
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static const struct regulator_linear_range arizona_micsupp_ranges[] = {
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REGULATOR_LINEAR_RANGE(1700000, 0, 0x1e, 50000),
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REGULATOR_LINEAR_RANGE(3300000, 0x1f, 0x1f, 0),
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};
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static const struct regulator_desc arizona_micsupp = {
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.name = "MICVDD",
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.supply_name = "CPVDD",
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.type = REGULATOR_VOLTAGE,
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.n_voltages = 32,
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.ops = &arizona_micsupp_ops,
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.vsel_reg = ARIZONA_LDO2_CONTROL_1,
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.vsel_mask = ARIZONA_LDO2_VSEL_MASK,
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.enable_reg = ARIZONA_MIC_CHARGE_PUMP_1,
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.enable_mask = ARIZONA_CPMIC_ENA,
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.bypass_reg = ARIZONA_MIC_CHARGE_PUMP_1,
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.bypass_mask = ARIZONA_CPMIC_BYPASS,
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.linear_ranges = arizona_micsupp_ranges,
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.n_linear_ranges = ARRAY_SIZE(arizona_micsupp_ranges),
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.enable_time = 3000,
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.owner = THIS_MODULE,
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};
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static const struct regulator_linear_range arizona_micsupp_ext_ranges[] = {
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REGULATOR_LINEAR_RANGE(900000, 0, 0x14, 25000),
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REGULATOR_LINEAR_RANGE(1500000, 0x15, 0x27, 100000),
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};
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static const struct regulator_desc arizona_micsupp_ext = {
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.name = "MICVDD",
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.supply_name = "CPVDD",
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.type = REGULATOR_VOLTAGE,
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.n_voltages = 40,
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.ops = &arizona_micsupp_ops,
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.vsel_reg = ARIZONA_LDO2_CONTROL_1,
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.vsel_mask = ARIZONA_LDO2_VSEL_MASK,
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.enable_reg = ARIZONA_MIC_CHARGE_PUMP_1,
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.enable_mask = ARIZONA_CPMIC_ENA,
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.bypass_reg = ARIZONA_MIC_CHARGE_PUMP_1,
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.bypass_mask = ARIZONA_CPMIC_BYPASS,
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.linear_ranges = arizona_micsupp_ext_ranges,
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.n_linear_ranges = ARRAY_SIZE(arizona_micsupp_ext_ranges),
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.enable_time = 3000,
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.owner = THIS_MODULE,
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};
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static const struct regulator_init_data arizona_micsupp_default = {
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.constraints = {
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.valid_ops_mask = REGULATOR_CHANGE_STATUS |
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REGULATOR_CHANGE_VOLTAGE |
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REGULATOR_CHANGE_BYPASS,
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.min_uV = 1700000,
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.max_uV = 3300000,
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},
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.num_consumer_supplies = 1,
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};
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static const struct regulator_init_data arizona_micsupp_ext_default = {
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.constraints = {
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.valid_ops_mask = REGULATOR_CHANGE_STATUS |
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REGULATOR_CHANGE_VOLTAGE |
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REGULATOR_CHANGE_BYPASS,
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.min_uV = 900000,
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.max_uV = 3300000,
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},
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.num_consumer_supplies = 1,
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};
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static int arizona_micsupp_of_get_pdata(struct arizona *arizona,
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struct regulator_config *config,
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const struct regulator_desc *desc)
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{
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struct arizona_pdata *pdata = &arizona->pdata;
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struct arizona_micsupp *micsupp = config->driver_data;
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struct device_node *np;
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struct regulator_init_data *init_data;
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np = of_get_child_by_name(arizona->dev->of_node, "micvdd");
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if (np) {
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config->of_node = np;
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init_data = of_get_regulator_init_data(arizona->dev, np, desc);
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if (init_data) {
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init_data->consumer_supplies = &micsupp->supply;
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init_data->num_consumer_supplies = 1;
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pdata->micvdd = init_data;
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}
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}
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return 0;
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}
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static int arizona_micsupp_probe(struct platform_device *pdev)
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{
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struct arizona *arizona = dev_get_drvdata(pdev->dev.parent);
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const struct regulator_desc *desc;
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struct regulator_config config = { };
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struct arizona_micsupp *micsupp;
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int ret;
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micsupp = devm_kzalloc(&pdev->dev, sizeof(*micsupp), GFP_KERNEL);
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if (!micsupp)
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return -ENOMEM;
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micsupp->arizona = arizona;
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INIT_WORK(&micsupp->check_cp_work, arizona_micsupp_check_cp);
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/*
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* Since the chip usually supplies itself we provide some
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* default init_data for it. This will be overridden with
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* platform data if provided.
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*/
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switch (arizona->type) {
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case WM5110:
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case WM8280:
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desc = &arizona_micsupp_ext;
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micsupp->init_data = arizona_micsupp_ext_default;
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break;
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default:
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desc = &arizona_micsupp;
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micsupp->init_data = arizona_micsupp_default;
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break;
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}
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micsupp->init_data.consumer_supplies = &micsupp->supply;
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micsupp->supply.supply = "MICVDD";
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micsupp->supply.dev_name = dev_name(arizona->dev);
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config.dev = arizona->dev;
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config.driver_data = micsupp;
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config.regmap = arizona->regmap;
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if (IS_ENABLED(CONFIG_OF)) {
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if (!dev_get_platdata(arizona->dev)) {
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ret = arizona_micsupp_of_get_pdata(arizona, &config,
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desc);
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if (ret < 0)
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return ret;
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}
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}
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if (arizona->pdata.micvdd)
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config.init_data = arizona->pdata.micvdd;
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else
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config.init_data = &micsupp->init_data;
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/* Default to regulated mode until the API supports bypass */
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regmap_update_bits(arizona->regmap, ARIZONA_MIC_CHARGE_PUMP_1,
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ARIZONA_CPMIC_BYPASS, 0);
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micsupp->regulator = devm_regulator_register(&pdev->dev,
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desc,
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&config);
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of_node_put(config.of_node);
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if (IS_ERR(micsupp->regulator)) {
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ret = PTR_ERR(micsupp->regulator);
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dev_err(arizona->dev, "Failed to register mic supply: %d\n",
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ret);
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return ret;
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}
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platform_set_drvdata(pdev, micsupp);
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return 0;
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}
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static struct platform_driver arizona_micsupp_driver = {
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.probe = arizona_micsupp_probe,
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.driver = {
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.name = "arizona-micsupp",
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},
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};
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module_platform_driver(arizona_micsupp_driver);
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/* Module information */
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MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
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MODULE_DESCRIPTION("Arizona microphone supply driver");
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MODULE_LICENSE("GPL");
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MODULE_ALIAS("platform:arizona-micsupp");
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