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