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b667a45d MB |
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> | |
6f1c9c57 | 19 | #include <linux/of.h> |
b667a45d MB |
20 | #include <linux/platform_device.h> |
21 | #include <linux/regulator/driver.h> | |
22 | #include <linux/regulator/machine.h> | |
36bcdf1b | 23 | #include <linux/regulator/of_regulator.h> |
b667a45d MB |
24 | #include <linux/gpio.h> |
25 | #include <linux/slab.h> | |
e6ed9058 MB |
26 | #include <linux/workqueue.h> |
27 | #include <sound/soc.h> | |
b667a45d MB |
28 | |
29 | #include <linux/mfd/arizona/core.h> | |
30 | #include <linux/mfd/arizona/pdata.h> | |
31 | #include <linux/mfd/arizona/registers.h> | |
32 | ||
b667a45d MB |
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; | |
e6ed9058 MB |
39 | |
40 | struct work_struct check_cp_work; | |
b667a45d MB |
41 | }; |
42 | ||
e6ed9058 MB |
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 | ||
b667a45d | 107 | static struct regulator_ops arizona_micsupp_ops = { |
e6ed9058 MB |
108 | .enable = arizona_micsupp_enable, |
109 | .disable = arizona_micsupp_disable, | |
b667a45d MB |
110 | .is_enabled = regulator_is_enabled_regmap, |
111 | ||
71979aa3 CK |
112 | .list_voltage = regulator_list_voltage_linear_range, |
113 | .map_voltage = regulator_map_voltage_linear_range, | |
b667a45d MB |
114 | |
115 | .get_voltage_sel = regulator_get_voltage_sel_regmap, | |
116 | .set_voltage_sel = regulator_set_voltage_sel_regmap, | |
e477ce07 MB |
117 | |
118 | .get_bypass = regulator_get_bypass_regmap, | |
e6ed9058 | 119 | .set_bypass = arizona_micsupp_set_bypass, |
b667a45d MB |
120 | }; |
121 | ||
71979aa3 CK |
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 | ||
b667a45d MB |
127 | static const struct regulator_desc arizona_micsupp = { |
128 | .name = "MICVDD", | |
129 | .supply_name = "CPVDD", | |
130 | .type = REGULATOR_VOLTAGE, | |
71979aa3 | 131 | .n_voltages = 32, |
b667a45d MB |
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, | |
e477ce07 MB |
138 | .bypass_reg = ARIZONA_MIC_CHARGE_PUMP_1, |
139 | .bypass_mask = ARIZONA_CPMIC_BYPASS, | |
b667a45d | 140 | |
71979aa3 CK |
141 | .linear_ranges = arizona_micsupp_ranges, |
142 | .n_linear_ranges = ARRAY_SIZE(arizona_micsupp_ranges), | |
143 | ||
95072818 MB |
144 | .enable_time = 3000, |
145 | ||
b667a45d MB |
146 | .owner = THIS_MODULE, |
147 | }; | |
148 | ||
d2e7491e CK |
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 | ||
b667a45d MB |
176 | static const struct regulator_init_data arizona_micsupp_default = { |
177 | .constraints = { | |
178 | .valid_ops_mask = REGULATOR_CHANGE_STATUS | | |
9fc50a2e MB |
179 | REGULATOR_CHANGE_VOLTAGE | |
180 | REGULATOR_CHANGE_BYPASS, | |
b667a45d MB |
181 | .min_uV = 1700000, |
182 | .max_uV = 3300000, | |
183 | }, | |
184 | ||
185 | .num_consumer_supplies = 1, | |
186 | }; | |
187 | ||
d2e7491e CK |
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 | ||
36bcdf1b CK |
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 | ||
a5023574 | 226 | static int arizona_micsupp_probe(struct platform_device *pdev) |
b667a45d MB |
227 | { |
228 | struct arizona *arizona = dev_get_drvdata(pdev->dev.parent); | |
d2e7491e | 229 | const struct regulator_desc *desc; |
b667a45d MB |
230 | struct regulator_config config = { }; |
231 | struct arizona_micsupp *micsupp; | |
232 | int ret; | |
233 | ||
234 | micsupp = devm_kzalloc(&pdev->dev, sizeof(*micsupp), GFP_KERNEL); | |
820cd31e | 235 | if (!micsupp) |
b667a45d | 236 | return -ENOMEM; |
b667a45d MB |
237 | |
238 | micsupp->arizona = arizona; | |
e6ed9058 | 239 | INIT_WORK(&micsupp->check_cp_work, arizona_micsupp_check_cp); |
b667a45d MB |
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 | */ | |
d2e7491e CK |
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 | ||
b667a45d MB |
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 | ||
36bcdf1b CK |
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 | ||
b667a45d MB |
273 | if (arizona->pdata.micvdd) |
274 | config.init_data = arizona->pdata.micvdd; | |
275 | else | |
276 | config.init_data = &micsupp->init_data; | |
277 | ||
6dc027c9 MB |
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 | ||
b6b7709c | 282 | micsupp->regulator = devm_regulator_register(&pdev->dev, |
d2e7491e | 283 | desc, |
b6b7709c | 284 | &config); |
b667a45d MB |
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 | ||
36bcdf1b CK |
292 | of_node_put(config.of_node); |
293 | ||
b667a45d MB |
294 | platform_set_drvdata(pdev, micsupp); |
295 | ||
296 | return 0; | |
297 | } | |
298 | ||
b667a45d MB |
299 | static struct platform_driver arizona_micsupp_driver = { |
300 | .probe = arizona_micsupp_probe, | |
b667a45d MB |
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"); |