405 lines · c
1// SPDX-License-Identifier: GPL-2.0+2//3// arizona-micsupp.c -- Microphone supply for Arizona devices4//5// Copyright 2012 Wolfson Microelectronics PLC.6//7// Author: Mark Brown <broonie@opensource.wolfsonmicro.com>8 9#include <linux/module.h>10#include <linux/moduleparam.h>11#include <linux/init.h>12#include <linux/bitops.h>13#include <linux/err.h>14#include <linux/of.h>15#include <linux/platform_device.h>16#include <linux/regulator/driver.h>17#include <linux/regulator/machine.h>18#include <linux/regulator/of_regulator.h>19#include <linux/slab.h>20#include <linux/workqueue.h>21#include <sound/soc.h>22 23#include <linux/mfd/arizona/core.h>24#include <linux/mfd/arizona/pdata.h>25#include <linux/mfd/arizona/registers.h>26 27#include <linux/mfd/madera/core.h>28#include <linux/mfd/madera/pdata.h>29#include <linux/mfd/madera/registers.h>30 31#include <linux/regulator/arizona-micsupp.h>32 33struct arizona_micsupp {34 struct regulator_dev *regulator;35 struct regmap *regmap;36 struct snd_soc_dapm_context **dapm;37 const struct regulator_desc *desc;38 struct device *dev;39 40 struct regulator_consumer_supply supply;41 struct regulator_init_data init_data;42 43 struct work_struct check_cp_work;44};45 46static void arizona_micsupp_check_cp(struct work_struct *work)47{48 struct arizona_micsupp *micsupp =49 container_of(work, struct arizona_micsupp, check_cp_work);50 struct snd_soc_dapm_context *dapm = *micsupp->dapm;51 struct snd_soc_component *component;52 const struct regulator_desc *desc = micsupp->desc;53 unsigned int val;54 int ret;55 56 ret = regmap_read(micsupp->regmap, desc->enable_reg, &val);57 if (ret != 0) {58 dev_err(micsupp->dev,59 "Failed to read CP state: %d\n", ret);60 return;61 }62 63 if (dapm) {64 component = snd_soc_dapm_to_component(dapm);65 66 if ((val & (desc->enable_mask | desc->bypass_mask)) ==67 desc->enable_mask)68 snd_soc_component_force_enable_pin(component,69 "MICSUPP");70 else71 snd_soc_component_disable_pin(component, "MICSUPP");72 73 snd_soc_dapm_sync(dapm);74 }75}76 77static int arizona_micsupp_enable(struct regulator_dev *rdev)78{79 struct arizona_micsupp *micsupp = rdev_get_drvdata(rdev);80 int ret;81 82 ret = regulator_enable_regmap(rdev);83 84 if (ret == 0)85 schedule_work(&micsupp->check_cp_work);86 87 return ret;88}89 90static int arizona_micsupp_disable(struct regulator_dev *rdev)91{92 struct arizona_micsupp *micsupp = rdev_get_drvdata(rdev);93 int ret;94 95 ret = regulator_disable_regmap(rdev);96 if (ret == 0)97 schedule_work(&micsupp->check_cp_work);98 99 return ret;100}101 102static int arizona_micsupp_set_bypass(struct regulator_dev *rdev, bool ena)103{104 struct arizona_micsupp *micsupp = rdev_get_drvdata(rdev);105 int ret;106 107 ret = regulator_set_bypass_regmap(rdev, ena);108 if (ret == 0)109 schedule_work(&micsupp->check_cp_work);110 111 return ret;112}113 114static const struct regulator_ops arizona_micsupp_ops = {115 .enable = arizona_micsupp_enable,116 .disable = arizona_micsupp_disable,117 .is_enabled = regulator_is_enabled_regmap,118 119 .list_voltage = regulator_list_voltage_linear_range,120 .map_voltage = regulator_map_voltage_linear_range,121 122 .get_voltage_sel = regulator_get_voltage_sel_regmap,123 .set_voltage_sel = regulator_set_voltage_sel_regmap,124 125 .get_bypass = regulator_get_bypass_regmap,126 .set_bypass = arizona_micsupp_set_bypass,127};128 129static const struct linear_range arizona_micsupp_ranges[] = {130 REGULATOR_LINEAR_RANGE(1700000, 0, 0x1e, 50000),131 REGULATOR_LINEAR_RANGE(3300000, 0x1f, 0x1f, 0),132};133 134static const struct regulator_desc arizona_micsupp = {135 .name = "MICVDD",136 .supply_name = "CPVDD",137 .type = REGULATOR_VOLTAGE,138 .n_voltages = 32,139 .ops = &arizona_micsupp_ops,140 141 .vsel_reg = ARIZONA_LDO2_CONTROL_1,142 .vsel_mask = ARIZONA_LDO2_VSEL_MASK,143 .enable_reg = ARIZONA_MIC_CHARGE_PUMP_1,144 .enable_mask = ARIZONA_CPMIC_ENA,145 .bypass_reg = ARIZONA_MIC_CHARGE_PUMP_1,146 .bypass_mask = ARIZONA_CPMIC_BYPASS,147 148 .linear_ranges = arizona_micsupp_ranges,149 .n_linear_ranges = ARRAY_SIZE(arizona_micsupp_ranges),150 151 .enable_time = 3000,152 153 .owner = THIS_MODULE,154};155 156static const struct linear_range arizona_micsupp_ext_ranges[] = {157 REGULATOR_LINEAR_RANGE(900000, 0, 0x14, 25000),158 REGULATOR_LINEAR_RANGE(1500000, 0x15, 0x27, 100000),159};160 161static const struct regulator_desc arizona_micsupp_ext = {162 .name = "MICVDD",163 .supply_name = "CPVDD",164 .type = REGULATOR_VOLTAGE,165 .n_voltages = 40,166 .ops = &arizona_micsupp_ops,167 168 .vsel_reg = ARIZONA_LDO2_CONTROL_1,169 .vsel_mask = ARIZONA_LDO2_VSEL_MASK,170 .enable_reg = ARIZONA_MIC_CHARGE_PUMP_1,171 .enable_mask = ARIZONA_CPMIC_ENA,172 .bypass_reg = ARIZONA_MIC_CHARGE_PUMP_1,173 .bypass_mask = ARIZONA_CPMIC_BYPASS,174 175 .linear_ranges = arizona_micsupp_ext_ranges,176 .n_linear_ranges = ARRAY_SIZE(arizona_micsupp_ext_ranges),177 178 .enable_time = 3000,179 180 .owner = THIS_MODULE,181};182 183static const struct regulator_init_data arizona_micsupp_default = {184 .constraints = {185 .valid_ops_mask = REGULATOR_CHANGE_STATUS |186 REGULATOR_CHANGE_VOLTAGE |187 REGULATOR_CHANGE_BYPASS,188 .min_uV = 1700000,189 .max_uV = 3300000,190 },191 192 .num_consumer_supplies = 1,193};194 195static const struct regulator_init_data arizona_micsupp_ext_default = {196 .constraints = {197 .valid_ops_mask = REGULATOR_CHANGE_STATUS |198 REGULATOR_CHANGE_VOLTAGE |199 REGULATOR_CHANGE_BYPASS,200 .min_uV = 900000,201 .max_uV = 3300000,202 },203 204 .num_consumer_supplies = 1,205};206 207static const struct regulator_desc madera_micsupp = {208 .name = "MICVDD",209 .supply_name = "CPVDD1",210 .type = REGULATOR_VOLTAGE,211 .n_voltages = 40,212 .ops = &arizona_micsupp_ops,213 .vsel_reg = MADERA_LDO2_CONTROL_1,214 .vsel_mask = MADERA_LDO2_VSEL_MASK,215 .enable_reg = MADERA_MIC_CHARGE_PUMP_1,216 .enable_mask = MADERA_CPMIC_ENA,217 .bypass_reg = MADERA_MIC_CHARGE_PUMP_1,218 .bypass_mask = MADERA_CPMIC_BYPASS,219 220 .linear_ranges = arizona_micsupp_ext_ranges,221 .n_linear_ranges = ARRAY_SIZE(arizona_micsupp_ext_ranges),222 223 .enable_time = 3000,224 225 .owner = THIS_MODULE,226};227 228static int arizona_micsupp_of_get_pdata(struct arizona_micsupp_pdata *pdata,229 struct regulator_config *config,230 const struct regulator_desc *desc)231{232 struct arizona_micsupp *micsupp = config->driver_data;233 struct device_node *np;234 struct regulator_init_data *init_data;235 236 np = of_get_child_by_name(config->dev->of_node, "micvdd");237 238 if (np) {239 config->of_node = np;240 241 init_data = of_get_regulator_init_data(config->dev, np, desc);242 243 if (init_data) {244 init_data->consumer_supplies = &micsupp->supply;245 init_data->num_consumer_supplies = 1;246 247 pdata->init_data = init_data;248 }249 }250 251 return 0;252}253 254static int arizona_micsupp_common_init(struct platform_device *pdev,255 struct arizona_micsupp *micsupp,256 const struct regulator_desc *desc,257 struct arizona_micsupp_pdata *pdata)258{259 struct regulator_config config = { };260 int ret;261 262 INIT_WORK(&micsupp->check_cp_work, arizona_micsupp_check_cp);263 264 micsupp->init_data.consumer_supplies = &micsupp->supply;265 micsupp->supply.dev_name = dev_name(micsupp->dev);266 micsupp->desc = desc;267 268 config.dev = micsupp->dev;269 config.driver_data = micsupp;270 config.regmap = micsupp->regmap;271 272 if (IS_ENABLED(CONFIG_OF)) {273 if (!dev_get_platdata(micsupp->dev)) {274 ret = arizona_micsupp_of_get_pdata(pdata, &config,275 desc);276 if (ret < 0)277 return ret;278 }279 }280 281 if (pdata->init_data)282 config.init_data = pdata->init_data;283 else284 config.init_data = &micsupp->init_data;285 286 /* Default to regulated mode */287 regmap_update_bits(micsupp->regmap, desc->enable_reg, desc->bypass_mask, 0);288 289 micsupp->regulator = devm_regulator_register(&pdev->dev,290 desc,291 &config);292 293 of_node_put(config.of_node);294 295 if (IS_ERR(micsupp->regulator)) {296 ret = PTR_ERR(micsupp->regulator);297 dev_err(micsupp->dev, "Failed to register mic supply: %d\n",298 ret);299 return ret;300 }301 302 platform_set_drvdata(pdev, micsupp);303 304 return 0;305}306 307static int arizona_micsupp_probe(struct platform_device *pdev)308{309 struct arizona *arizona = dev_get_drvdata(pdev->dev.parent);310 const struct regulator_desc *desc;311 struct arizona_micsupp *micsupp;312 313 micsupp = devm_kzalloc(&pdev->dev, sizeof(*micsupp), GFP_KERNEL);314 if (!micsupp)315 return -ENOMEM;316 317 micsupp->regmap = arizona->regmap;318 micsupp->dapm = &arizona->dapm;319 micsupp->dev = arizona->dev;320 321 micsupp->supply.supply = "MICVDD";322 323 /*324 * Since the chip usually supplies itself we provide some325 * default init_data for it. This will be overridden with326 * platform data if provided.327 */328 switch (arizona->type) {329 case WM5110:330 case WM8280:331 desc = &arizona_micsupp_ext;332 micsupp->init_data = arizona_micsupp_ext_default;333 break;334 default:335 desc = &arizona_micsupp;336 micsupp->init_data = arizona_micsupp_default;337 break;338 }339 340 return arizona_micsupp_common_init(pdev, micsupp, desc,341 &arizona->pdata.micvdd);342}343 344static int madera_micsupp_probe(struct platform_device *pdev)345{346 struct madera *madera = dev_get_drvdata(pdev->dev.parent);347 struct arizona_micsupp *micsupp;348 349 micsupp = devm_kzalloc(&pdev->dev, sizeof(*micsupp), GFP_KERNEL);350 if (!micsupp)351 return -ENOMEM;352 353 micsupp->regmap = madera->regmap;354 micsupp->dapm = &madera->dapm;355 micsupp->dev = madera->dev;356 micsupp->init_data = arizona_micsupp_ext_default;357 358 micsupp->supply.supply = "MICVDD";359 360 return arizona_micsupp_common_init(pdev, micsupp, &madera_micsupp,361 &madera->pdata.micvdd);362}363 364static struct platform_driver arizona_micsupp_driver = {365 .probe = arizona_micsupp_probe,366 .driver = {367 .name = "arizona-micsupp",368 .probe_type = PROBE_FORCE_SYNCHRONOUS,369 },370};371 372static struct platform_driver madera_micsupp_driver = {373 .probe = madera_micsupp_probe,374 .driver = {375 .name = "madera-micsupp",376 .probe_type = PROBE_FORCE_SYNCHRONOUS,377 },378};379 380static struct platform_driver * const arizona_micsupp_drivers[] = {381 &arizona_micsupp_driver,382 &madera_micsupp_driver,383};384 385static int __init arizona_micsupp_init(void)386{387 return platform_register_drivers(arizona_micsupp_drivers,388 ARRAY_SIZE(arizona_micsupp_drivers));389}390module_init(arizona_micsupp_init);391 392static void __exit arizona_micsupp_exit(void)393{394 platform_unregister_drivers(arizona_micsupp_drivers,395 ARRAY_SIZE(arizona_micsupp_drivers));396}397module_exit(arizona_micsupp_exit);398 399/* Module information */400MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");401MODULE_DESCRIPTION("Arizona microphone supply driver");402MODULE_LICENSE("GPL");403MODULE_ALIAS("platform:arizona-micsupp");404MODULE_ALIAS("platform:madera-micsupp");405