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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/platform_device.h> | |
20 | #include <linux/regulator/driver.h> | |
21 | #include <linux/regulator/machine.h> | |
22 | #include <linux/gpio.h> | |
23 | #include <linux/slab.h> | |
e6ed9058 MB |
24 | #include <linux/workqueue.h> |
25 | #include <sound/soc.h> | |
b667a45d MB |
26 | |
27 | #include <linux/mfd/arizona/core.h> | |
28 | #include <linux/mfd/arizona/pdata.h> | |
29 | #include <linux/mfd/arizona/registers.h> | |
30 | ||
b667a45d MB |
31 | struct arizona_micsupp { |
32 | struct regulator_dev *regulator; | |
33 | struct arizona *arizona; | |
34 | ||
35 | struct regulator_consumer_supply supply; | |
36 | struct regulator_init_data init_data; | |
e6ed9058 MB |
37 | |
38 | struct work_struct check_cp_work; | |
b667a45d MB |
39 | }; |
40 | ||
e6ed9058 MB |
41 | static void arizona_micsupp_check_cp(struct work_struct *work) |
42 | { | |
43 | struct arizona_micsupp *micsupp = | |
44 | container_of(work, struct arizona_micsupp, check_cp_work); | |
45 | struct snd_soc_dapm_context *dapm = micsupp->arizona->dapm; | |
46 | struct arizona *arizona = micsupp->arizona; | |
47 | struct regmap *regmap = arizona->regmap; | |
48 | unsigned int reg; | |
49 | int ret; | |
50 | ||
51 | ret = regmap_read(regmap, ARIZONA_MIC_CHARGE_PUMP_1, ®); | |
52 | if (ret != 0) { | |
53 | dev_err(arizona->dev, "Failed to read CP state: %d\n", ret); | |
54 | return; | |
55 | } | |
56 | ||
57 | if (dapm) { | |
58 | if ((reg & (ARIZONA_CPMIC_ENA | ARIZONA_CPMIC_BYPASS)) == | |
59 | ARIZONA_CPMIC_ENA) | |
60 | snd_soc_dapm_force_enable_pin(dapm, "MICSUPP"); | |
61 | else | |
62 | snd_soc_dapm_disable_pin(dapm, "MICSUPP"); | |
63 | ||
64 | snd_soc_dapm_sync(dapm); | |
65 | } | |
66 | } | |
67 | ||
68 | static int arizona_micsupp_enable(struct regulator_dev *rdev) | |
69 | { | |
70 | struct arizona_micsupp *micsupp = rdev_get_drvdata(rdev); | |
71 | int ret; | |
72 | ||
73 | ret = regulator_enable_regmap(rdev); | |
74 | ||
75 | if (ret == 0) | |
76 | schedule_work(&micsupp->check_cp_work); | |
77 | ||
78 | return ret; | |
79 | } | |
80 | ||
81 | static int arizona_micsupp_disable(struct regulator_dev *rdev) | |
82 | { | |
83 | struct arizona_micsupp *micsupp = rdev_get_drvdata(rdev); | |
84 | int ret; | |
85 | ||
86 | ret = regulator_disable_regmap(rdev); | |
87 | if (ret == 0) | |
88 | schedule_work(&micsupp->check_cp_work); | |
89 | ||
90 | return ret; | |
91 | } | |
92 | ||
93 | static int arizona_micsupp_set_bypass(struct regulator_dev *rdev, bool ena) | |
94 | { | |
95 | struct arizona_micsupp *micsupp = rdev_get_drvdata(rdev); | |
96 | int ret; | |
97 | ||
98 | ret = regulator_set_bypass_regmap(rdev, ena); | |
99 | if (ret == 0) | |
100 | schedule_work(&micsupp->check_cp_work); | |
101 | ||
102 | return ret; | |
103 | } | |
104 | ||
b667a45d | 105 | static struct regulator_ops arizona_micsupp_ops = { |
e6ed9058 MB |
106 | .enable = arizona_micsupp_enable, |
107 | .disable = arizona_micsupp_disable, | |
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108 | .is_enabled = regulator_is_enabled_regmap, |
109 | ||
71979aa3 CK |
110 | .list_voltage = regulator_list_voltage_linear_range, |
111 | .map_voltage = regulator_map_voltage_linear_range, | |
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112 | |
113 | .get_voltage_sel = regulator_get_voltage_sel_regmap, | |
114 | .set_voltage_sel = regulator_set_voltage_sel_regmap, | |
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115 | |
116 | .get_bypass = regulator_get_bypass_regmap, | |
e6ed9058 | 117 | .set_bypass = arizona_micsupp_set_bypass, |
b667a45d MB |
118 | }; |
119 | ||
71979aa3 CK |
120 | static const struct regulator_linear_range arizona_micsupp_ranges[] = { |
121 | REGULATOR_LINEAR_RANGE(1700000, 0, 0x1e, 50000), | |
122 | REGULATOR_LINEAR_RANGE(3300000, 0x1f, 0x1f, 0), | |
123 | }; | |
124 | ||
b667a45d MB |
125 | static const struct regulator_desc arizona_micsupp = { |
126 | .name = "MICVDD", | |
127 | .supply_name = "CPVDD", | |
128 | .type = REGULATOR_VOLTAGE, | |
71979aa3 | 129 | .n_voltages = 32, |
b667a45d MB |
130 | .ops = &arizona_micsupp_ops, |
131 | ||
132 | .vsel_reg = ARIZONA_LDO2_CONTROL_1, | |
133 | .vsel_mask = ARIZONA_LDO2_VSEL_MASK, | |
134 | .enable_reg = ARIZONA_MIC_CHARGE_PUMP_1, | |
135 | .enable_mask = ARIZONA_CPMIC_ENA, | |
e477ce07 MB |
136 | .bypass_reg = ARIZONA_MIC_CHARGE_PUMP_1, |
137 | .bypass_mask = ARIZONA_CPMIC_BYPASS, | |
b667a45d | 138 | |
71979aa3 CK |
139 | .linear_ranges = arizona_micsupp_ranges, |
140 | .n_linear_ranges = ARRAY_SIZE(arizona_micsupp_ranges), | |
141 | ||
95072818 MB |
142 | .enable_time = 3000, |
143 | ||
b667a45d MB |
144 | .owner = THIS_MODULE, |
145 | }; | |
146 | ||
d2e7491e CK |
147 | static const struct regulator_linear_range arizona_micsupp_ext_ranges[] = { |
148 | REGULATOR_LINEAR_RANGE(900000, 0, 0x14, 25000), | |
149 | REGULATOR_LINEAR_RANGE(1500000, 0x15, 0x27, 100000), | |
150 | }; | |
151 | ||
152 | static const struct regulator_desc arizona_micsupp_ext = { | |
153 | .name = "MICVDD", | |
154 | .supply_name = "CPVDD", | |
155 | .type = REGULATOR_VOLTAGE, | |
156 | .n_voltages = 40, | |
157 | .ops = &arizona_micsupp_ops, | |
158 | ||
159 | .vsel_reg = ARIZONA_LDO2_CONTROL_1, | |
160 | .vsel_mask = ARIZONA_LDO2_VSEL_MASK, | |
161 | .enable_reg = ARIZONA_MIC_CHARGE_PUMP_1, | |
162 | .enable_mask = ARIZONA_CPMIC_ENA, | |
163 | .bypass_reg = ARIZONA_MIC_CHARGE_PUMP_1, | |
164 | .bypass_mask = ARIZONA_CPMIC_BYPASS, | |
165 | ||
166 | .linear_ranges = arizona_micsupp_ext_ranges, | |
167 | .n_linear_ranges = ARRAY_SIZE(arizona_micsupp_ext_ranges), | |
168 | ||
169 | .enable_time = 3000, | |
170 | ||
171 | .owner = THIS_MODULE, | |
172 | }; | |
173 | ||
b667a45d MB |
174 | static const struct regulator_init_data arizona_micsupp_default = { |
175 | .constraints = { | |
176 | .valid_ops_mask = REGULATOR_CHANGE_STATUS | | |
9fc50a2e MB |
177 | REGULATOR_CHANGE_VOLTAGE | |
178 | REGULATOR_CHANGE_BYPASS, | |
b667a45d MB |
179 | .min_uV = 1700000, |
180 | .max_uV = 3300000, | |
181 | }, | |
182 | ||
183 | .num_consumer_supplies = 1, | |
184 | }; | |
185 | ||
d2e7491e CK |
186 | static const struct regulator_init_data arizona_micsupp_ext_default = { |
187 | .constraints = { | |
188 | .valid_ops_mask = REGULATOR_CHANGE_STATUS | | |
189 | REGULATOR_CHANGE_VOLTAGE | | |
190 | REGULATOR_CHANGE_BYPASS, | |
191 | .min_uV = 900000, | |
192 | .max_uV = 3300000, | |
193 | }, | |
194 | ||
195 | .num_consumer_supplies = 1, | |
196 | }; | |
197 | ||
a5023574 | 198 | static int arizona_micsupp_probe(struct platform_device *pdev) |
b667a45d MB |
199 | { |
200 | struct arizona *arizona = dev_get_drvdata(pdev->dev.parent); | |
d2e7491e | 201 | const struct regulator_desc *desc; |
b667a45d MB |
202 | struct regulator_config config = { }; |
203 | struct arizona_micsupp *micsupp; | |
204 | int ret; | |
205 | ||
206 | micsupp = devm_kzalloc(&pdev->dev, sizeof(*micsupp), GFP_KERNEL); | |
207 | if (micsupp == NULL) { | |
208 | dev_err(&pdev->dev, "Unable to allocate private data\n"); | |
209 | return -ENOMEM; | |
210 | } | |
211 | ||
212 | micsupp->arizona = arizona; | |
e6ed9058 | 213 | INIT_WORK(&micsupp->check_cp_work, arizona_micsupp_check_cp); |
b667a45d MB |
214 | |
215 | /* | |
216 | * Since the chip usually supplies itself we provide some | |
217 | * default init_data for it. This will be overridden with | |
218 | * platform data if provided. | |
219 | */ | |
d2e7491e CK |
220 | switch (arizona->type) { |
221 | case WM5110: | |
222 | desc = &arizona_micsupp_ext; | |
223 | micsupp->init_data = arizona_micsupp_ext_default; | |
224 | break; | |
225 | default: | |
226 | desc = &arizona_micsupp; | |
227 | micsupp->init_data = arizona_micsupp_default; | |
228 | break; | |
229 | } | |
230 | ||
b667a45d MB |
231 | micsupp->init_data.consumer_supplies = &micsupp->supply; |
232 | micsupp->supply.supply = "MICVDD"; | |
233 | micsupp->supply.dev_name = dev_name(arizona->dev); | |
234 | ||
235 | config.dev = arizona->dev; | |
236 | config.driver_data = micsupp; | |
237 | config.regmap = arizona->regmap; | |
238 | ||
239 | if (arizona->pdata.micvdd) | |
240 | config.init_data = arizona->pdata.micvdd; | |
241 | else | |
242 | config.init_data = &micsupp->init_data; | |
243 | ||
6dc027c9 MB |
244 | /* Default to regulated mode until the API supports bypass */ |
245 | regmap_update_bits(arizona->regmap, ARIZONA_MIC_CHARGE_PUMP_1, | |
246 | ARIZONA_CPMIC_BYPASS, 0); | |
247 | ||
b6b7709c | 248 | micsupp->regulator = devm_regulator_register(&pdev->dev, |
d2e7491e | 249 | desc, |
b6b7709c | 250 | &config); |
b667a45d MB |
251 | if (IS_ERR(micsupp->regulator)) { |
252 | ret = PTR_ERR(micsupp->regulator); | |
253 | dev_err(arizona->dev, "Failed to register mic supply: %d\n", | |
254 | ret); | |
255 | return ret; | |
256 | } | |
257 | ||
258 | platform_set_drvdata(pdev, micsupp); | |
259 | ||
260 | return 0; | |
261 | } | |
262 | ||
b667a45d MB |
263 | static struct platform_driver arizona_micsupp_driver = { |
264 | .probe = arizona_micsupp_probe, | |
b667a45d MB |
265 | .driver = { |
266 | .name = "arizona-micsupp", | |
267 | .owner = THIS_MODULE, | |
268 | }, | |
269 | }; | |
270 | ||
271 | module_platform_driver(arizona_micsupp_driver); | |
272 | ||
273 | /* Module information */ | |
274 | MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>"); | |
275 | MODULE_DESCRIPTION("Arizona microphone supply driver"); | |
276 | MODULE_LICENSE("GPL"); | |
277 | MODULE_ALIAS("platform:arizona-micsupp"); |