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 unsigned int enable_reg; 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 unsigned int val; 53 int ret; 54 55 ret = regmap_read(micsupp->regmap, micsupp->enable_reg, &val); 56 if (ret != 0) { 57 dev_err(micsupp->dev, 58 "Failed to read CP state: %d\n", ret); 59 return; 60 } 61 62 if (dapm) { 63 component = snd_soc_dapm_to_component(dapm); 64 65 if ((val & (ARIZONA_CPMIC_ENA | ARIZONA_CPMIC_BYPASS)) == 66 ARIZONA_CPMIC_ENA) 67 snd_soc_component_force_enable_pin(component, 68 "MICSUPP"); 69 else 70 snd_soc_component_disable_pin(component, "MICSUPP"); 71 72 snd_soc_dapm_sync(dapm); 73 } 74 } 75 76 static int arizona_micsupp_enable(struct regulator_dev *rdev) 77 { 78 struct arizona_micsupp *micsupp = rdev_get_drvdata(rdev); 79 int ret; 80 81 ret = regulator_enable_regmap(rdev); 82 83 if (ret == 0) 84 schedule_work(&micsupp->check_cp_work); 85 86 return ret; 87 } 88 89 static int arizona_micsupp_disable(struct regulator_dev *rdev) 90 { 91 struct arizona_micsupp *micsupp = rdev_get_drvdata(rdev); 92 int ret; 93 94 ret = regulator_disable_regmap(rdev); 95 if (ret == 0) 96 schedule_work(&micsupp->check_cp_work); 97 98 return ret; 99 } 100 101 static int arizona_micsupp_set_bypass(struct regulator_dev *rdev, bool ena) 102 { 103 struct arizona_micsupp *micsupp = rdev_get_drvdata(rdev); 104 int ret; 105 106 ret = regulator_set_bypass_regmap(rdev, ena); 107 if (ret == 0) 108 schedule_work(&micsupp->check_cp_work); 109 110 return ret; 111 } 112 113 static const struct regulator_ops arizona_micsupp_ops = { 114 .enable = arizona_micsupp_enable, 115 .disable = arizona_micsupp_disable, 116 .is_enabled = regulator_is_enabled_regmap, 117 118 .list_voltage = regulator_list_voltage_linear_range, 119 .map_voltage = regulator_map_voltage_linear_range, 120 121 .get_voltage_sel = regulator_get_voltage_sel_regmap, 122 .set_voltage_sel = regulator_set_voltage_sel_regmap, 123 124 .get_bypass = regulator_get_bypass_regmap, 125 .set_bypass = arizona_micsupp_set_bypass, 126 }; 127 128 static const struct regulator_linear_range arizona_micsupp_ranges[] = { 129 REGULATOR_LINEAR_RANGE(1700000, 0, 0x1e, 50000), 130 REGULATOR_LINEAR_RANGE(3300000, 0x1f, 0x1f, 0), 131 }; 132 133 static const struct regulator_desc arizona_micsupp = { 134 .name = "MICVDD", 135 .supply_name = "CPVDD", 136 .type = REGULATOR_VOLTAGE, 137 .n_voltages = 32, 138 .ops = &arizona_micsupp_ops, 139 140 .vsel_reg = ARIZONA_LDO2_CONTROL_1, 141 .vsel_mask = ARIZONA_LDO2_VSEL_MASK, 142 .enable_reg = ARIZONA_MIC_CHARGE_PUMP_1, 143 .enable_mask = ARIZONA_CPMIC_ENA, 144 .bypass_reg = ARIZONA_MIC_CHARGE_PUMP_1, 145 .bypass_mask = ARIZONA_CPMIC_BYPASS, 146 147 .linear_ranges = arizona_micsupp_ranges, 148 .n_linear_ranges = ARRAY_SIZE(arizona_micsupp_ranges), 149 150 .enable_time = 3000, 151 152 .owner = THIS_MODULE, 153 }; 154 155 static const struct regulator_linear_range arizona_micsupp_ext_ranges[] = { 156 REGULATOR_LINEAR_RANGE(900000, 0, 0x14, 25000), 157 REGULATOR_LINEAR_RANGE(1500000, 0x15, 0x27, 100000), 158 }; 159 160 static const struct regulator_desc arizona_micsupp_ext = { 161 .name = "MICVDD", 162 .supply_name = "CPVDD", 163 .type = REGULATOR_VOLTAGE, 164 .n_voltages = 40, 165 .ops = &arizona_micsupp_ops, 166 167 .vsel_reg = ARIZONA_LDO2_CONTROL_1, 168 .vsel_mask = ARIZONA_LDO2_VSEL_MASK, 169 .enable_reg = ARIZONA_MIC_CHARGE_PUMP_1, 170 .enable_mask = ARIZONA_CPMIC_ENA, 171 .bypass_reg = ARIZONA_MIC_CHARGE_PUMP_1, 172 .bypass_mask = ARIZONA_CPMIC_BYPASS, 173 174 .linear_ranges = arizona_micsupp_ext_ranges, 175 .n_linear_ranges = ARRAY_SIZE(arizona_micsupp_ext_ranges), 176 177 .enable_time = 3000, 178 179 .owner = THIS_MODULE, 180 }; 181 182 static const struct regulator_init_data arizona_micsupp_default = { 183 .constraints = { 184 .valid_ops_mask = REGULATOR_CHANGE_STATUS | 185 REGULATOR_CHANGE_VOLTAGE | 186 REGULATOR_CHANGE_BYPASS, 187 .min_uV = 1700000, 188 .max_uV = 3300000, 189 }, 190 191 .num_consumer_supplies = 1, 192 }; 193 194 static const struct regulator_init_data arizona_micsupp_ext_default = { 195 .constraints = { 196 .valid_ops_mask = REGULATOR_CHANGE_STATUS | 197 REGULATOR_CHANGE_VOLTAGE | 198 REGULATOR_CHANGE_BYPASS, 199 .min_uV = 900000, 200 .max_uV = 3300000, 201 }, 202 203 .num_consumer_supplies = 1, 204 }; 205 206 static const struct regulator_desc madera_micsupp = { 207 .name = "MICVDD", 208 .supply_name = "CPVDD1", 209 .type = REGULATOR_VOLTAGE, 210 .n_voltages = 40, 211 .ops = &arizona_micsupp_ops, 212 213 .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.supply = "MICVDD"; 266 micsupp->supply.dev_name = dev_name(micsupp->dev); 267 micsupp->enable_reg = desc->enable_reg; 268 269 config.dev = micsupp->dev; 270 config.driver_data = micsupp; 271 config.regmap = micsupp->regmap; 272 273 if (IS_ENABLED(CONFIG_OF)) { 274 if (!dev_get_platdata(micsupp->dev)) { 275 ret = arizona_micsupp_of_get_pdata(pdata, &config, 276 desc); 277 if (ret < 0) 278 return ret; 279 } 280 } 281 282 if (pdata->init_data) 283 config.init_data = pdata->init_data; 284 else 285 config.init_data = &micsupp->init_data; 286 287 /* Default to regulated mode */ 288 regmap_update_bits(micsupp->regmap, micsupp->enable_reg, 289 ARIZONA_CPMIC_BYPASS, 0); 290 291 micsupp->regulator = devm_regulator_register(&pdev->dev, 292 desc, 293 &config); 294 295 of_node_put(config.of_node); 296 297 if (IS_ERR(micsupp->regulator)) { 298 ret = PTR_ERR(micsupp->regulator); 299 dev_err(micsupp->dev, "Failed to register mic supply: %d\n", 300 ret); 301 return ret; 302 } 303 304 platform_set_drvdata(pdev, micsupp); 305 306 return 0; 307 } 308 309 static int arizona_micsupp_probe(struct platform_device *pdev) 310 { 311 struct arizona *arizona = dev_get_drvdata(pdev->dev.parent); 312 const struct regulator_desc *desc; 313 struct arizona_micsupp *micsupp; 314 315 micsupp = devm_kzalloc(&pdev->dev, sizeof(*micsupp), GFP_KERNEL); 316 if (!micsupp) 317 return -ENOMEM; 318 319 micsupp->regmap = arizona->regmap; 320 micsupp->dapm = &arizona->dapm; 321 micsupp->dev = arizona->dev; 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 return arizona_micsupp_common_init(pdev, micsupp, &madera_micsupp, 359 &madera->pdata.micvdd); 360 } 361 362 static struct platform_driver arizona_micsupp_driver = { 363 .probe = arizona_micsupp_probe, 364 .driver = { 365 .name = "arizona-micsupp", 366 }, 367 }; 368 369 static struct platform_driver madera_micsupp_driver = { 370 .probe = madera_micsupp_probe, 371 .driver = { 372 .name = "madera-micsupp", 373 }, 374 }; 375 376 static struct platform_driver * const arizona_micsupp_drivers[] = { 377 &arizona_micsupp_driver, 378 &madera_micsupp_driver, 379 }; 380 381 static int __init arizona_micsupp_init(void) 382 { 383 return platform_register_drivers(arizona_micsupp_drivers, 384 ARRAY_SIZE(arizona_micsupp_drivers)); 385 } 386 module_init(arizona_micsupp_init); 387 388 static void __exit arizona_micsupp_exit(void) 389 { 390 platform_unregister_drivers(arizona_micsupp_drivers, 391 ARRAY_SIZE(arizona_micsupp_drivers)); 392 } 393 module_exit(arizona_micsupp_exit); 394 395 /* Module information */ 396 MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>"); 397 MODULE_DESCRIPTION("Arizona microphone supply driver"); 398 MODULE_LICENSE("GPL"); 399 MODULE_ALIAS("platform:arizona-micsupp"); 400 MODULE_ALIAS("platform:madera-micsupp"); 401