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/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 33 struct 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 46 static 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 else 71 snd_soc_component_disable_pin(component, "MICSUPP"); 72 73 snd_soc_dapm_sync(dapm); 74 } 75 } 76 77 static 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 90 static 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 } 101 102 static 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 } 113 114 static 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 }; 128 129 static const struct linear_range arizona_micsupp_ranges[] = { 130 REGULATOR_LINEAR_RANGE(1700000, 0, 0x1e, 50000), 131 REGULATOR_LINEAR_RANGE(3300000, 0x1f, 0x1f, 0), 132 }; 133 134 static 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 }; 155 156 static 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 }; 160 161 static 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 }; 182 183 static 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 }; 194 195 static 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 }; 206 207 static 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 }; 227 228 static 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 } 253 254 static 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 else 284 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 } 306 307 static 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 some 325 * default init_data for it. This will be overridden with 326 * 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 } 343 344 static 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 } 363 364 static struct platform_driver arizona_micsupp_driver = { 365 .probe = arizona_micsupp_probe, 366 .driver = { 367 .name = "arizona-micsupp", 368 }, 369 }; 370 371 static struct platform_driver madera_micsupp_driver = { 372 .probe = madera_micsupp_probe, 373 .driver = { 374 .name = "madera-micsupp", 375 }, 376 }; 377 378 static struct platform_driver * const arizona_micsupp_drivers[] = { 379 &arizona_micsupp_driver, 380 &madera_micsupp_driver, 381 }; 382 383 static int __init arizona_micsupp_init(void) 384 { 385 return platform_register_drivers(arizona_micsupp_drivers, 386 ARRAY_SIZE(arizona_micsupp_drivers)); 387 } 388 module_init(arizona_micsupp_init); 389 390 static void __exit arizona_micsupp_exit(void) 391 { 392 platform_unregister_drivers(arizona_micsupp_drivers, 393 ARRAY_SIZE(arizona_micsupp_drivers)); 394 } 395 module_exit(arizona_micsupp_exit); 396 397 /* Module information */ 398 MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>"); 399 MODULE_DESCRIPTION("Arizona microphone supply driver"); 400 MODULE_LICENSE("GPL"); 401 MODULE_ALIAS("platform:arizona-micsupp"); 402 MODULE_ALIAS("platform:madera-micsupp"); 403