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 const struct regulator_desc *desc = micsupp->desc; 52 unsigned int val; 53 int ret; 54 55 ret = regmap_read(micsupp->regmap, desc->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 if ((val & (desc->enable_mask | desc->bypass_mask)) == 64 desc->enable_mask) 65 snd_soc_dapm_force_enable_pin(dapm, "MICSUPP"); 66 else 67 snd_soc_dapm_disable_pin(dapm, "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 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 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 const struct regulator_desc madera_micsupp = { 204 .name = "MICVDD", 205 .supply_name = "CPVDD1", 206 .type = REGULATOR_VOLTAGE, 207 .n_voltages = 40, 208 .ops = &arizona_micsupp_ops, 209 .vsel_reg = MADERA_LDO2_CONTROL_1, 210 .vsel_mask = MADERA_LDO2_VSEL_MASK, 211 .enable_reg = MADERA_MIC_CHARGE_PUMP_1, 212 .enable_mask = MADERA_CPMIC_ENA, 213 .bypass_reg = MADERA_MIC_CHARGE_PUMP_1, 214 .bypass_mask = MADERA_CPMIC_BYPASS, 215 216 .linear_ranges = arizona_micsupp_ext_ranges, 217 .n_linear_ranges = ARRAY_SIZE(arizona_micsupp_ext_ranges), 218 219 .enable_time = 3000, 220 221 .owner = THIS_MODULE, 222 }; 223 224 static int arizona_micsupp_of_get_pdata(struct arizona_micsupp_pdata *pdata, 225 struct regulator_config *config, 226 const struct regulator_desc *desc) 227 { 228 struct arizona_micsupp *micsupp = config->driver_data; 229 struct device_node *np; 230 struct regulator_init_data *init_data; 231 232 np = of_get_child_by_name(config->dev->of_node, "micvdd"); 233 234 if (np) { 235 config->of_node = np; 236 237 init_data = of_get_regulator_init_data(config->dev, np, desc); 238 239 if (init_data) { 240 init_data->consumer_supplies = &micsupp->supply; 241 init_data->num_consumer_supplies = 1; 242 243 pdata->init_data = init_data; 244 } 245 } 246 247 return 0; 248 } 249 250 static int arizona_micsupp_common_init(struct platform_device *pdev, 251 struct arizona_micsupp *micsupp, 252 const struct regulator_desc *desc, 253 struct arizona_micsupp_pdata *pdata) 254 { 255 struct regulator_config config = { }; 256 int ret; 257 258 INIT_WORK(&micsupp->check_cp_work, arizona_micsupp_check_cp); 259 260 micsupp->init_data.consumer_supplies = &micsupp->supply; 261 micsupp->supply.dev_name = dev_name(micsupp->dev); 262 micsupp->desc = desc; 263 264 config.dev = micsupp->dev; 265 config.driver_data = micsupp; 266 config.regmap = micsupp->regmap; 267 268 if (IS_ENABLED(CONFIG_OF)) { 269 if (!dev_get_platdata(micsupp->dev)) { 270 ret = arizona_micsupp_of_get_pdata(pdata, &config, 271 desc); 272 if (ret < 0) 273 return ret; 274 } 275 } 276 277 if (pdata->init_data) 278 config.init_data = pdata->init_data; 279 else 280 config.init_data = &micsupp->init_data; 281 282 /* Default to regulated mode */ 283 regmap_update_bits(micsupp->regmap, desc->enable_reg, desc->bypass_mask, 0); 284 285 micsupp->regulator = devm_regulator_register(&pdev->dev, 286 desc, 287 &config); 288 289 of_node_put(config.of_node); 290 291 if (IS_ERR(micsupp->regulator)) { 292 ret = PTR_ERR(micsupp->regulator); 293 dev_err(micsupp->dev, "Failed to register mic supply: %d\n", 294 ret); 295 return ret; 296 } 297 298 platform_set_drvdata(pdev, micsupp); 299 300 return 0; 301 } 302 303 static int arizona_micsupp_probe(struct platform_device *pdev) 304 { 305 struct arizona *arizona = dev_get_drvdata(pdev->dev.parent); 306 const struct regulator_desc *desc; 307 struct arizona_micsupp *micsupp; 308 309 micsupp = devm_kzalloc(&pdev->dev, sizeof(*micsupp), GFP_KERNEL); 310 if (!micsupp) 311 return -ENOMEM; 312 313 micsupp->regmap = arizona->regmap; 314 micsupp->dapm = &arizona->dapm; 315 micsupp->dev = arizona->dev; 316 317 micsupp->supply.supply = "MICVDD"; 318 319 /* 320 * Since the chip usually supplies itself we provide some 321 * default init_data for it. This will be overridden with 322 * platform data if provided. 323 */ 324 switch (arizona->type) { 325 case WM5110: 326 case WM8280: 327 desc = &arizona_micsupp_ext; 328 micsupp->init_data = arizona_micsupp_ext_default; 329 break; 330 default: 331 desc = &arizona_micsupp; 332 micsupp->init_data = arizona_micsupp_default; 333 break; 334 } 335 336 return arizona_micsupp_common_init(pdev, micsupp, desc, 337 &arizona->pdata.micvdd); 338 } 339 340 static int madera_micsupp_probe(struct platform_device *pdev) 341 { 342 struct madera *madera = dev_get_drvdata(pdev->dev.parent); 343 struct arizona_micsupp *micsupp; 344 345 micsupp = devm_kzalloc(&pdev->dev, sizeof(*micsupp), GFP_KERNEL); 346 if (!micsupp) 347 return -ENOMEM; 348 349 micsupp->regmap = madera->regmap; 350 micsupp->dapm = &madera->dapm; 351 micsupp->dev = madera->dev; 352 micsupp->init_data = arizona_micsupp_ext_default; 353 354 micsupp->supply.supply = "MICVDD"; 355 356 return arizona_micsupp_common_init(pdev, micsupp, &madera_micsupp, 357 &madera->pdata.micvdd); 358 } 359 360 static struct platform_driver arizona_micsupp_driver = { 361 .probe = arizona_micsupp_probe, 362 .driver = { 363 .name = "arizona-micsupp", 364 .probe_type = PROBE_FORCE_SYNCHRONOUS, 365 }, 366 }; 367 368 static struct platform_driver madera_micsupp_driver = { 369 .probe = madera_micsupp_probe, 370 .driver = { 371 .name = "madera-micsupp", 372 .probe_type = PROBE_FORCE_SYNCHRONOUS, 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