1 // SPDX-License-Identifier: GPL-2.0+ 2 // 3 // arizona-micsupp.c -- Microphone supply for Arizona devices 4 // 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/gpio.h> 20 #include <linux/slab.h> 21 #include <linux/workqueue.h> 22 #include <sound/soc.h> 23 24 #include <linux/mfd/arizona/core.h> 25 #include <linux/mfd/arizona/pdata.h> 26 #include <linux/mfd/arizona/registers.h> 27 28 #include <linux/regulator/arizona-micsupp.h> 29 30 struct arizona_micsupp { 31 struct regulator_dev *regulator; 32 struct regmap *regmap; 33 struct snd_soc_dapm_context **dapm; 34 unsigned int enable_reg; 35 struct device *dev; 36 37 struct regulator_consumer_supply supply; 38 struct regulator_init_data init_data; 39 40 struct work_struct check_cp_work; 41 }; 42 43 static void arizona_micsupp_check_cp(struct work_struct *work) 44 { 45 struct arizona_micsupp *micsupp = 46 container_of(work, struct arizona_micsupp, check_cp_work); 47 struct snd_soc_dapm_context *dapm = *micsupp->dapm; 48 struct snd_soc_component *component; 49 unsigned int val; 50 int ret; 51 52 ret = regmap_read(micsupp->regmap, micsupp->enable_reg, &val); 53 if (ret != 0) { 54 dev_err(micsupp->dev, 55 "Failed to read CP state: %d\n", ret); 56 return; 57 } 58 59 if (dapm) { 60 component = snd_soc_dapm_to_component(dapm); 61 62 if ((val & (ARIZONA_CPMIC_ENA | ARIZONA_CPMIC_BYPASS)) == 63 ARIZONA_CPMIC_ENA) 64 snd_soc_component_force_enable_pin(component, 65 "MICSUPP"); 66 else 67 snd_soc_component_disable_pin(component, "MICSUPP"); 68 69 snd_soc_dapm_sync(dapm); 70 } 71 } 72 73 static int arizona_micsupp_enable(struct regulator_dev *rdev) 74 { 75 struct arizona_micsupp *micsupp = rdev_get_drvdata(rdev); 76 int ret; 77 78 ret = regulator_enable_regmap(rdev); 79 80 if (ret == 0) 81 schedule_work(&micsupp->check_cp_work); 82 83 return ret; 84 } 85 86 static int arizona_micsupp_disable(struct regulator_dev *rdev) 87 { 88 struct arizona_micsupp *micsupp = rdev_get_drvdata(rdev); 89 int ret; 90 91 ret = regulator_disable_regmap(rdev); 92 if (ret == 0) 93 schedule_work(&micsupp->check_cp_work); 94 95 return ret; 96 } 97 98 static int arizona_micsupp_set_bypass(struct regulator_dev *rdev, bool ena) 99 { 100 struct arizona_micsupp *micsupp = rdev_get_drvdata(rdev); 101 int ret; 102 103 ret = regulator_set_bypass_regmap(rdev, ena); 104 if (ret == 0) 105 schedule_work(&micsupp->check_cp_work); 106 107 return ret; 108 } 109 110 static const struct regulator_ops arizona_micsupp_ops = { 111 .enable = arizona_micsupp_enable, 112 .disable = arizona_micsupp_disable, 113 .is_enabled = regulator_is_enabled_regmap, 114 115 .list_voltage = regulator_list_voltage_linear_range, 116 .map_voltage = regulator_map_voltage_linear_range, 117 118 .get_voltage_sel = regulator_get_voltage_sel_regmap, 119 .set_voltage_sel = regulator_set_voltage_sel_regmap, 120 121 .get_bypass = regulator_get_bypass_regmap, 122 .set_bypass = arizona_micsupp_set_bypass, 123 }; 124 125 static const struct regulator_linear_range arizona_micsupp_ranges[] = { 126 REGULATOR_LINEAR_RANGE(1700000, 0, 0x1e, 50000), 127 REGULATOR_LINEAR_RANGE(3300000, 0x1f, 0x1f, 0), 128 }; 129 130 static const struct regulator_desc arizona_micsupp = { 131 .name = "MICVDD", 132 .supply_name = "CPVDD", 133 .type = REGULATOR_VOLTAGE, 134 .n_voltages = 32, 135 .ops = &arizona_micsupp_ops, 136 137 .vsel_reg = ARIZONA_LDO2_CONTROL_1, 138 .vsel_mask = ARIZONA_LDO2_VSEL_MASK, 139 .enable_reg = ARIZONA_MIC_CHARGE_PUMP_1, 140 .enable_mask = ARIZONA_CPMIC_ENA, 141 .bypass_reg = ARIZONA_MIC_CHARGE_PUMP_1, 142 .bypass_mask = ARIZONA_CPMIC_BYPASS, 143 144 .linear_ranges = arizona_micsupp_ranges, 145 .n_linear_ranges = ARRAY_SIZE(arizona_micsupp_ranges), 146 147 .enable_time = 3000, 148 149 .owner = THIS_MODULE, 150 }; 151 152 static const struct regulator_linear_range arizona_micsupp_ext_ranges[] = { 153 REGULATOR_LINEAR_RANGE(900000, 0, 0x14, 25000), 154 REGULATOR_LINEAR_RANGE(1500000, 0x15, 0x27, 100000), 155 }; 156 157 static const struct regulator_desc arizona_micsupp_ext = { 158 .name = "MICVDD", 159 .supply_name = "CPVDD", 160 .type = REGULATOR_VOLTAGE, 161 .n_voltages = 40, 162 .ops = &arizona_micsupp_ops, 163 164 .vsel_reg = ARIZONA_LDO2_CONTROL_1, 165 .vsel_mask = ARIZONA_LDO2_VSEL_MASK, 166 .enable_reg = ARIZONA_MIC_CHARGE_PUMP_1, 167 .enable_mask = ARIZONA_CPMIC_ENA, 168 .bypass_reg = ARIZONA_MIC_CHARGE_PUMP_1, 169 .bypass_mask = ARIZONA_CPMIC_BYPASS, 170 171 .linear_ranges = arizona_micsupp_ext_ranges, 172 .n_linear_ranges = ARRAY_SIZE(arizona_micsupp_ext_ranges), 173 174 .enable_time = 3000, 175 176 .owner = THIS_MODULE, 177 }; 178 179 static const struct regulator_init_data arizona_micsupp_default = { 180 .constraints = { 181 .valid_ops_mask = REGULATOR_CHANGE_STATUS | 182 REGULATOR_CHANGE_VOLTAGE | 183 REGULATOR_CHANGE_BYPASS, 184 .min_uV = 1700000, 185 .max_uV = 3300000, 186 }, 187 188 .num_consumer_supplies = 1, 189 }; 190 191 static const struct regulator_init_data arizona_micsupp_ext_default = { 192 .constraints = { 193 .valid_ops_mask = REGULATOR_CHANGE_STATUS | 194 REGULATOR_CHANGE_VOLTAGE | 195 REGULATOR_CHANGE_BYPASS, 196 .min_uV = 900000, 197 .max_uV = 3300000, 198 }, 199 200 .num_consumer_supplies = 1, 201 }; 202 203 static int arizona_micsupp_of_get_pdata(struct arizona_micsupp_pdata *pdata, 204 struct regulator_config *config, 205 const struct regulator_desc *desc) 206 { 207 struct arizona_micsupp *micsupp = config->driver_data; 208 struct device_node *np; 209 struct regulator_init_data *init_data; 210 211 np = of_get_child_by_name(config->dev->of_node, "micvdd"); 212 213 if (np) { 214 config->of_node = np; 215 216 init_data = of_get_regulator_init_data(config->dev, np, desc); 217 218 if (init_data) { 219 init_data->consumer_supplies = &micsupp->supply; 220 init_data->num_consumer_supplies = 1; 221 222 pdata->init_data = init_data; 223 } 224 } 225 226 return 0; 227 } 228 229 static int arizona_micsupp_common_init(struct platform_device *pdev, 230 struct arizona_micsupp *micsupp, 231 const struct regulator_desc *desc, 232 struct arizona_micsupp_pdata *pdata) 233 { 234 struct regulator_config config = { }; 235 int ret; 236 237 INIT_WORK(&micsupp->check_cp_work, arizona_micsupp_check_cp); 238 239 micsupp->init_data.consumer_supplies = &micsupp->supply; 240 micsupp->supply.supply = "MICVDD"; 241 micsupp->supply.dev_name = dev_name(micsupp->dev); 242 micsupp->enable_reg = desc->enable_reg; 243 244 config.dev = micsupp->dev; 245 config.driver_data = micsupp; 246 config.regmap = micsupp->regmap; 247 248 if (IS_ENABLED(CONFIG_OF)) { 249 if (!dev_get_platdata(micsupp->dev)) { 250 ret = arizona_micsupp_of_get_pdata(pdata, &config, 251 desc); 252 if (ret < 0) 253 return ret; 254 } 255 } 256 257 if (pdata->init_data) 258 config.init_data = pdata->init_data; 259 else 260 config.init_data = &micsupp->init_data; 261 262 /* Default to regulated mode */ 263 regmap_update_bits(micsupp->regmap, micsupp->enable_reg, 264 ARIZONA_CPMIC_BYPASS, 0); 265 266 micsupp->regulator = devm_regulator_register(&pdev->dev, 267 desc, 268 &config); 269 270 of_node_put(config.of_node); 271 272 if (IS_ERR(micsupp->regulator)) { 273 ret = PTR_ERR(micsupp->regulator); 274 dev_err(micsupp->dev, "Failed to register mic supply: %d\n", 275 ret); 276 return ret; 277 } 278 279 platform_set_drvdata(pdev, micsupp); 280 281 return 0; 282 } 283 284 static int arizona_micsupp_probe(struct platform_device *pdev) 285 { 286 struct arizona *arizona = dev_get_drvdata(pdev->dev.parent); 287 const struct regulator_desc *desc; 288 struct arizona_micsupp *micsupp; 289 290 micsupp = devm_kzalloc(&pdev->dev, sizeof(*micsupp), GFP_KERNEL); 291 if (!micsupp) 292 return -ENOMEM; 293 294 micsupp->regmap = arizona->regmap; 295 micsupp->dapm = &arizona->dapm; 296 micsupp->dev = arizona->dev; 297 298 /* 299 * Since the chip usually supplies itself we provide some 300 * default init_data for it. This will be overridden with 301 * platform data if provided. 302 */ 303 switch (arizona->type) { 304 case WM5110: 305 case WM8280: 306 desc = &arizona_micsupp_ext; 307 micsupp->init_data = arizona_micsupp_ext_default; 308 break; 309 default: 310 desc = &arizona_micsupp; 311 micsupp->init_data = arizona_micsupp_default; 312 break; 313 } 314 315 return arizona_micsupp_common_init(pdev, micsupp, desc, 316 &arizona->pdata.micvdd); 317 } 318 319 static struct platform_driver arizona_micsupp_driver = { 320 .probe = arizona_micsupp_probe, 321 .driver = { 322 .name = "arizona-micsupp", 323 }, 324 }; 325 326 module_platform_driver(arizona_micsupp_driver); 327 328 /* Module information */ 329 MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>"); 330 MODULE_DESCRIPTION("Arizona microphone supply driver"); 331 MODULE_LICENSE("GPL"); 332 MODULE_ALIAS("platform:arizona-micsupp"); 333