1 /* 2 * arizona-micsupp.c -- Microphone supply for Arizona devices 3 * 4 * Copyright 2012 Wolfson Microelectronics PLC. 5 * 6 * Author: Mark Brown <broonie@opensource.wolfsonmicro.com> 7 * 8 * This program is free software; you can redistribute it and/or modify it 9 * under the terms of the GNU General Public License as published by the 10 * Free Software Foundation; either version 2 of the License, or (at your 11 * option) any later version. 12 */ 13 14 #include <linux/module.h> 15 #include <linux/moduleparam.h> 16 #include <linux/init.h> 17 #include <linux/bitops.h> 18 #include <linux/err.h> 19 #include <linux/of.h> 20 #include <linux/platform_device.h> 21 #include <linux/regulator/driver.h> 22 #include <linux/regulator/machine.h> 23 #include <linux/regulator/of_regulator.h> 24 #include <linux/gpio.h> 25 #include <linux/slab.h> 26 #include <linux/workqueue.h> 27 #include <sound/soc.h> 28 29 #include <linux/mfd/arizona/core.h> 30 #include <linux/mfd/arizona/pdata.h> 31 #include <linux/mfd/arizona/registers.h> 32 33 #include <linux/regulator/arizona-micsupp.h> 34 35 struct arizona_micsupp { 36 struct regulator_dev *regulator; 37 struct regmap *regmap; 38 struct snd_soc_dapm_context **dapm; 39 unsigned int enable_reg; 40 struct device *dev; 41 42 struct regulator_consumer_supply supply; 43 struct regulator_init_data init_data; 44 45 struct work_struct check_cp_work; 46 }; 47 48 static void arizona_micsupp_check_cp(struct work_struct *work) 49 { 50 struct arizona_micsupp *micsupp = 51 container_of(work, struct arizona_micsupp, check_cp_work); 52 struct snd_soc_dapm_context *dapm = *micsupp->dapm; 53 struct snd_soc_component *component; 54 unsigned int val; 55 int ret; 56 57 ret = regmap_read(micsupp->regmap, micsupp->enable_reg, &val); 58 if (ret != 0) { 59 dev_err(micsupp->dev, 60 "Failed to read CP state: %d\n", ret); 61 return; 62 } 63 64 if (dapm) { 65 component = snd_soc_dapm_to_component(dapm); 66 67 if ((val & (ARIZONA_CPMIC_ENA | ARIZONA_CPMIC_BYPASS)) == 68 ARIZONA_CPMIC_ENA) 69 snd_soc_component_force_enable_pin(component, 70 "MICSUPP"); 71 else 72 snd_soc_component_disable_pin(component, "MICSUPP"); 73 74 snd_soc_dapm_sync(dapm); 75 } 76 } 77 78 static int arizona_micsupp_enable(struct regulator_dev *rdev) 79 { 80 struct arizona_micsupp *micsupp = rdev_get_drvdata(rdev); 81 int ret; 82 83 ret = regulator_enable_regmap(rdev); 84 85 if (ret == 0) 86 schedule_work(&micsupp->check_cp_work); 87 88 return ret; 89 } 90 91 static int arizona_micsupp_disable(struct regulator_dev *rdev) 92 { 93 struct arizona_micsupp *micsupp = rdev_get_drvdata(rdev); 94 int ret; 95 96 ret = regulator_disable_regmap(rdev); 97 if (ret == 0) 98 schedule_work(&micsupp->check_cp_work); 99 100 return ret; 101 } 102 103 static int arizona_micsupp_set_bypass(struct regulator_dev *rdev, bool ena) 104 { 105 struct arizona_micsupp *micsupp = rdev_get_drvdata(rdev); 106 int ret; 107 108 ret = regulator_set_bypass_regmap(rdev, ena); 109 if (ret == 0) 110 schedule_work(&micsupp->check_cp_work); 111 112 return ret; 113 } 114 115 static const struct regulator_ops arizona_micsupp_ops = { 116 .enable = arizona_micsupp_enable, 117 .disable = arizona_micsupp_disable, 118 .is_enabled = regulator_is_enabled_regmap, 119 120 .list_voltage = regulator_list_voltage_linear_range, 121 .map_voltage = regulator_map_voltage_linear_range, 122 123 .get_voltage_sel = regulator_get_voltage_sel_regmap, 124 .set_voltage_sel = regulator_set_voltage_sel_regmap, 125 126 .get_bypass = regulator_get_bypass_regmap, 127 .set_bypass = arizona_micsupp_set_bypass, 128 }; 129 130 static const struct regulator_linear_range arizona_micsupp_ranges[] = { 131 REGULATOR_LINEAR_RANGE(1700000, 0, 0x1e, 50000), 132 REGULATOR_LINEAR_RANGE(3300000, 0x1f, 0x1f, 0), 133 }; 134 135 static const struct regulator_desc arizona_micsupp = { 136 .name = "MICVDD", 137 .supply_name = "CPVDD", 138 .type = REGULATOR_VOLTAGE, 139 .n_voltages = 32, 140 .ops = &arizona_micsupp_ops, 141 142 .vsel_reg = ARIZONA_LDO2_CONTROL_1, 143 .vsel_mask = ARIZONA_LDO2_VSEL_MASK, 144 .enable_reg = ARIZONA_MIC_CHARGE_PUMP_1, 145 .enable_mask = ARIZONA_CPMIC_ENA, 146 .bypass_reg = ARIZONA_MIC_CHARGE_PUMP_1, 147 .bypass_mask = ARIZONA_CPMIC_BYPASS, 148 149 .linear_ranges = arizona_micsupp_ranges, 150 .n_linear_ranges = ARRAY_SIZE(arizona_micsupp_ranges), 151 152 .enable_time = 3000, 153 154 .owner = THIS_MODULE, 155 }; 156 157 static const struct regulator_linear_range arizona_micsupp_ext_ranges[] = { 158 REGULATOR_LINEAR_RANGE(900000, 0, 0x14, 25000), 159 REGULATOR_LINEAR_RANGE(1500000, 0x15, 0x27, 100000), 160 }; 161 162 static const struct regulator_desc arizona_micsupp_ext = { 163 .name = "MICVDD", 164 .supply_name = "CPVDD", 165 .type = REGULATOR_VOLTAGE, 166 .n_voltages = 40, 167 .ops = &arizona_micsupp_ops, 168 169 .vsel_reg = ARIZONA_LDO2_CONTROL_1, 170 .vsel_mask = ARIZONA_LDO2_VSEL_MASK, 171 .enable_reg = ARIZONA_MIC_CHARGE_PUMP_1, 172 .enable_mask = ARIZONA_CPMIC_ENA, 173 .bypass_reg = ARIZONA_MIC_CHARGE_PUMP_1, 174 .bypass_mask = ARIZONA_CPMIC_BYPASS, 175 176 .linear_ranges = arizona_micsupp_ext_ranges, 177 .n_linear_ranges = ARRAY_SIZE(arizona_micsupp_ext_ranges), 178 179 .enable_time = 3000, 180 181 .owner = THIS_MODULE, 182 }; 183 184 static const struct regulator_init_data arizona_micsupp_default = { 185 .constraints = { 186 .valid_ops_mask = REGULATOR_CHANGE_STATUS | 187 REGULATOR_CHANGE_VOLTAGE | 188 REGULATOR_CHANGE_BYPASS, 189 .min_uV = 1700000, 190 .max_uV = 3300000, 191 }, 192 193 .num_consumer_supplies = 1, 194 }; 195 196 static const struct regulator_init_data arizona_micsupp_ext_default = { 197 .constraints = { 198 .valid_ops_mask = REGULATOR_CHANGE_STATUS | 199 REGULATOR_CHANGE_VOLTAGE | 200 REGULATOR_CHANGE_BYPASS, 201 .min_uV = 900000, 202 .max_uV = 3300000, 203 }, 204 205 .num_consumer_supplies = 1, 206 }; 207 208 static int arizona_micsupp_of_get_pdata(struct arizona_micsupp_pdata *pdata, 209 struct regulator_config *config, 210 const struct regulator_desc *desc) 211 { 212 struct arizona_micsupp *micsupp = config->driver_data; 213 struct device_node *np; 214 struct regulator_init_data *init_data; 215 216 np = of_get_child_by_name(config->dev->of_node, "micvdd"); 217 218 if (np) { 219 config->of_node = np; 220 221 init_data = of_get_regulator_init_data(config->dev, np, desc); 222 223 if (init_data) { 224 init_data->consumer_supplies = &micsupp->supply; 225 init_data->num_consumer_supplies = 1; 226 227 pdata->init_data = init_data; 228 } 229 } 230 231 return 0; 232 } 233 234 static int arizona_micsupp_common_init(struct platform_device *pdev, 235 struct arizona_micsupp *micsupp, 236 const struct regulator_desc *desc, 237 struct arizona_micsupp_pdata *pdata) 238 { 239 struct regulator_config config = { }; 240 int ret; 241 242 INIT_WORK(&micsupp->check_cp_work, arizona_micsupp_check_cp); 243 244 micsupp->init_data.consumer_supplies = &micsupp->supply; 245 micsupp->supply.supply = "MICVDD"; 246 micsupp->supply.dev_name = dev_name(micsupp->dev); 247 micsupp->enable_reg = desc->enable_reg; 248 249 config.dev = micsupp->dev; 250 config.driver_data = micsupp; 251 config.regmap = micsupp->regmap; 252 253 if (IS_ENABLED(CONFIG_OF)) { 254 if (!dev_get_platdata(micsupp->dev)) { 255 ret = arizona_micsupp_of_get_pdata(pdata, &config, 256 desc); 257 if (ret < 0) 258 return ret; 259 } 260 } 261 262 if (pdata->init_data) 263 config.init_data = pdata->init_data; 264 else 265 config.init_data = &micsupp->init_data; 266 267 /* Default to regulated mode */ 268 regmap_update_bits(micsupp->regmap, micsupp->enable_reg, 269 ARIZONA_CPMIC_BYPASS, 0); 270 271 micsupp->regulator = devm_regulator_register(&pdev->dev, 272 desc, 273 &config); 274 275 of_node_put(config.of_node); 276 277 if (IS_ERR(micsupp->regulator)) { 278 ret = PTR_ERR(micsupp->regulator); 279 dev_err(micsupp->dev, "Failed to register mic supply: %d\n", 280 ret); 281 return ret; 282 } 283 284 platform_set_drvdata(pdev, micsupp); 285 286 return 0; 287 } 288 289 static int arizona_micsupp_probe(struct platform_device *pdev) 290 { 291 struct arizona *arizona = dev_get_drvdata(pdev->dev.parent); 292 const struct regulator_desc *desc; 293 struct arizona_micsupp *micsupp; 294 295 micsupp = devm_kzalloc(&pdev->dev, sizeof(*micsupp), GFP_KERNEL); 296 if (!micsupp) 297 return -ENOMEM; 298 299 micsupp->regmap = arizona->regmap; 300 micsupp->dapm = &arizona->dapm; 301 micsupp->dev = arizona->dev; 302 303 /* 304 * Since the chip usually supplies itself we provide some 305 * default init_data for it. This will be overridden with 306 * platform data if provided. 307 */ 308 switch (arizona->type) { 309 case WM5110: 310 case WM8280: 311 desc = &arizona_micsupp_ext; 312 micsupp->init_data = arizona_micsupp_ext_default; 313 break; 314 default: 315 desc = &arizona_micsupp; 316 micsupp->init_data = arizona_micsupp_default; 317 break; 318 } 319 320 return arizona_micsupp_common_init(pdev, micsupp, desc, 321 &arizona->pdata.micvdd); 322 } 323 324 static struct platform_driver arizona_micsupp_driver = { 325 .probe = arizona_micsupp_probe, 326 .driver = { 327 .name = "arizona-micsupp", 328 }, 329 }; 330 331 module_platform_driver(arizona_micsupp_driver); 332 333 /* Module information */ 334 MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>"); 335 MODULE_DESCRIPTION("Arizona microphone supply driver"); 336 MODULE_LICENSE("GPL"); 337 MODULE_ALIAS("platform:arizona-micsupp"); 338