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 | struct snd_soc_component *component; |
52 | const struct regulator_desc *desc = micsupp->desc; |
53 | unsigned int val; |
54 | int ret; |
55 | |
56 | ret = regmap_read(map: micsupp->regmap, reg: desc->enable_reg, val: &val); |
57 | if (ret != 0) { |
58 | dev_err(micsupp->dev, |
59 | "Failed to read CP state: %d\n" , ret); |
60 | return; |
61 | } |
62 | |
63 | if (dapm) { |
64 | component = snd_soc_dapm_to_component(dapm); |
65 | |
66 | if ((val & (desc->enable_mask | desc->bypass_mask)) == |
67 | desc->enable_mask) |
68 | snd_soc_component_force_enable_pin(component, |
69 | pin: "MICSUPP" ); |
70 | else |
71 | snd_soc_component_disable_pin(component, pin: "MICSUPP" ); |
72 | |
73 | snd_soc_dapm_sync(dapm); |
74 | } |
75 | } |
76 | |
77 | static int arizona_micsupp_enable(struct regulator_dev *rdev) |
78 | { |
79 | struct arizona_micsupp *micsupp = rdev_get_drvdata(rdev); |
80 | int ret; |
81 | |
82 | ret = regulator_enable_regmap(rdev); |
83 | |
84 | if (ret == 0) |
85 | schedule_work(work: &micsupp->check_cp_work); |
86 | |
87 | return ret; |
88 | } |
89 | |
90 | static int arizona_micsupp_disable(struct regulator_dev *rdev) |
91 | { |
92 | struct arizona_micsupp *micsupp = rdev_get_drvdata(rdev); |
93 | int ret; |
94 | |
95 | ret = regulator_disable_regmap(rdev); |
96 | if (ret == 0) |
97 | schedule_work(work: &micsupp->check_cp_work); |
98 | |
99 | return ret; |
100 | } |
101 | |
102 | static int arizona_micsupp_set_bypass(struct regulator_dev *rdev, bool ena) |
103 | { |
104 | struct arizona_micsupp *micsupp = rdev_get_drvdata(rdev); |
105 | int ret; |
106 | |
107 | ret = regulator_set_bypass_regmap(rdev, enable: ena); |
108 | if (ret == 0) |
109 | schedule_work(work: &micsupp->check_cp_work); |
110 | |
111 | return ret; |
112 | } |
113 | |
114 | static const struct regulator_ops arizona_micsupp_ops = { |
115 | .enable = arizona_micsupp_enable, |
116 | .disable = arizona_micsupp_disable, |
117 | .is_enabled = regulator_is_enabled_regmap, |
118 | |
119 | .list_voltage = regulator_list_voltage_linear_range, |
120 | .map_voltage = regulator_map_voltage_linear_range, |
121 | |
122 | .get_voltage_sel = regulator_get_voltage_sel_regmap, |
123 | .set_voltage_sel = regulator_set_voltage_sel_regmap, |
124 | |
125 | .get_bypass = regulator_get_bypass_regmap, |
126 | .set_bypass = arizona_micsupp_set_bypass, |
127 | }; |
128 | |
129 | static const struct linear_range arizona_micsupp_ranges[] = { |
130 | REGULATOR_LINEAR_RANGE(1700000, 0, 0x1e, 50000), |
131 | REGULATOR_LINEAR_RANGE(3300000, 0x1f, 0x1f, 0), |
132 | }; |
133 | |
134 | static const struct regulator_desc arizona_micsupp = { |
135 | .name = "MICVDD" , |
136 | .supply_name = "CPVDD" , |
137 | .type = REGULATOR_VOLTAGE, |
138 | .n_voltages = 32, |
139 | .ops = &arizona_micsupp_ops, |
140 | |
141 | .vsel_reg = ARIZONA_LDO2_CONTROL_1, |
142 | .vsel_mask = ARIZONA_LDO2_VSEL_MASK, |
143 | .enable_reg = ARIZONA_MIC_CHARGE_PUMP_1, |
144 | .enable_mask = ARIZONA_CPMIC_ENA, |
145 | .bypass_reg = ARIZONA_MIC_CHARGE_PUMP_1, |
146 | .bypass_mask = ARIZONA_CPMIC_BYPASS, |
147 | |
148 | .linear_ranges = arizona_micsupp_ranges, |
149 | .n_linear_ranges = ARRAY_SIZE(arizona_micsupp_ranges), |
150 | |
151 | .enable_time = 3000, |
152 | |
153 | .owner = THIS_MODULE, |
154 | }; |
155 | |
156 | static const struct linear_range arizona_micsupp_ext_ranges[] = { |
157 | REGULATOR_LINEAR_RANGE(900000, 0, 0x14, 25000), |
158 | REGULATOR_LINEAR_RANGE(1500000, 0x15, 0x27, 100000), |
159 | }; |
160 | |
161 | static const struct regulator_desc arizona_micsupp_ext = { |
162 | .name = "MICVDD" , |
163 | .supply_name = "CPVDD" , |
164 | .type = REGULATOR_VOLTAGE, |
165 | .n_voltages = 40, |
166 | .ops = &arizona_micsupp_ops, |
167 | |
168 | .vsel_reg = ARIZONA_LDO2_CONTROL_1, |
169 | .vsel_mask = ARIZONA_LDO2_VSEL_MASK, |
170 | .enable_reg = ARIZONA_MIC_CHARGE_PUMP_1, |
171 | .enable_mask = ARIZONA_CPMIC_ENA, |
172 | .bypass_reg = ARIZONA_MIC_CHARGE_PUMP_1, |
173 | .bypass_mask = ARIZONA_CPMIC_BYPASS, |
174 | |
175 | .linear_ranges = arizona_micsupp_ext_ranges, |
176 | .n_linear_ranges = ARRAY_SIZE(arizona_micsupp_ext_ranges), |
177 | |
178 | .enable_time = 3000, |
179 | |
180 | .owner = THIS_MODULE, |
181 | }; |
182 | |
183 | static const struct regulator_init_data arizona_micsupp_default = { |
184 | .constraints = { |
185 | .valid_ops_mask = REGULATOR_CHANGE_STATUS | |
186 | REGULATOR_CHANGE_VOLTAGE | |
187 | REGULATOR_CHANGE_BYPASS, |
188 | .min_uV = 1700000, |
189 | .max_uV = 3300000, |
190 | }, |
191 | |
192 | .num_consumer_supplies = 1, |
193 | }; |
194 | |
195 | static const struct regulator_init_data arizona_micsupp_ext_default = { |
196 | .constraints = { |
197 | .valid_ops_mask = REGULATOR_CHANGE_STATUS | |
198 | REGULATOR_CHANGE_VOLTAGE | |
199 | REGULATOR_CHANGE_BYPASS, |
200 | .min_uV = 900000, |
201 | .max_uV = 3300000, |
202 | }, |
203 | |
204 | .num_consumer_supplies = 1, |
205 | }; |
206 | |
207 | static const struct regulator_desc madera_micsupp = { |
208 | .name = "MICVDD" , |
209 | .supply_name = "CPVDD1" , |
210 | .type = REGULATOR_VOLTAGE, |
211 | .n_voltages = 40, |
212 | .ops = &arizona_micsupp_ops, |
213 | .vsel_reg = MADERA_LDO2_CONTROL_1, |
214 | .vsel_mask = MADERA_LDO2_VSEL_MASK, |
215 | .enable_reg = MADERA_MIC_CHARGE_PUMP_1, |
216 | .enable_mask = MADERA_CPMIC_ENA, |
217 | .bypass_reg = MADERA_MIC_CHARGE_PUMP_1, |
218 | .bypass_mask = MADERA_CPMIC_BYPASS, |
219 | |
220 | .linear_ranges = arizona_micsupp_ext_ranges, |
221 | .n_linear_ranges = ARRAY_SIZE(arizona_micsupp_ext_ranges), |
222 | |
223 | .enable_time = 3000, |
224 | |
225 | .owner = THIS_MODULE, |
226 | }; |
227 | |
228 | static int arizona_micsupp_of_get_pdata(struct arizona_micsupp_pdata *pdata, |
229 | struct regulator_config *config, |
230 | const struct regulator_desc *desc) |
231 | { |
232 | struct arizona_micsupp *micsupp = config->driver_data; |
233 | struct device_node *np; |
234 | struct regulator_init_data *init_data; |
235 | |
236 | np = of_get_child_by_name(node: config->dev->of_node, name: "micvdd" ); |
237 | |
238 | if (np) { |
239 | config->of_node = np; |
240 | |
241 | init_data = of_get_regulator_init_data(dev: config->dev, node: np, desc); |
242 | |
243 | if (init_data) { |
244 | init_data->consumer_supplies = &micsupp->supply; |
245 | init_data->num_consumer_supplies = 1; |
246 | |
247 | pdata->init_data = init_data; |
248 | } |
249 | } |
250 | |
251 | return 0; |
252 | } |
253 | |
254 | static int arizona_micsupp_common_init(struct platform_device *pdev, |
255 | struct arizona_micsupp *micsupp, |
256 | const struct regulator_desc *desc, |
257 | struct arizona_micsupp_pdata *pdata) |
258 | { |
259 | struct regulator_config config = { }; |
260 | int ret; |
261 | |
262 | INIT_WORK(&micsupp->check_cp_work, arizona_micsupp_check_cp); |
263 | |
264 | micsupp->init_data.consumer_supplies = &micsupp->supply; |
265 | micsupp->supply.dev_name = dev_name(dev: micsupp->dev); |
266 | micsupp->desc = desc; |
267 | |
268 | config.dev = micsupp->dev; |
269 | config.driver_data = micsupp; |
270 | config.regmap = micsupp->regmap; |
271 | |
272 | if (IS_ENABLED(CONFIG_OF)) { |
273 | if (!dev_get_platdata(dev: micsupp->dev)) { |
274 | ret = arizona_micsupp_of_get_pdata(pdata, config: &config, |
275 | desc); |
276 | if (ret < 0) |
277 | return ret; |
278 | } |
279 | } |
280 | |
281 | if (pdata->init_data) |
282 | config.init_data = pdata->init_data; |
283 | else |
284 | config.init_data = &micsupp->init_data; |
285 | |
286 | /* Default to regulated mode */ |
287 | regmap_update_bits(map: micsupp->regmap, reg: desc->enable_reg, mask: desc->bypass_mask, val: 0); |
288 | |
289 | micsupp->regulator = devm_regulator_register(dev: &pdev->dev, |
290 | regulator_desc: desc, |
291 | config: &config); |
292 | |
293 | of_node_put(node: config.of_node); |
294 | |
295 | if (IS_ERR(ptr: micsupp->regulator)) { |
296 | ret = PTR_ERR(ptr: micsupp->regulator); |
297 | dev_err(micsupp->dev, "Failed to register mic supply: %d\n" , |
298 | ret); |
299 | return ret; |
300 | } |
301 | |
302 | platform_set_drvdata(pdev, data: micsupp); |
303 | |
304 | return 0; |
305 | } |
306 | |
307 | static int arizona_micsupp_probe(struct platform_device *pdev) |
308 | { |
309 | struct arizona *arizona = dev_get_drvdata(dev: pdev->dev.parent); |
310 | const struct regulator_desc *desc; |
311 | struct arizona_micsupp *micsupp; |
312 | |
313 | micsupp = devm_kzalloc(dev: &pdev->dev, size: sizeof(*micsupp), GFP_KERNEL); |
314 | if (!micsupp) |
315 | return -ENOMEM; |
316 | |
317 | micsupp->regmap = arizona->regmap; |
318 | micsupp->dapm = &arizona->dapm; |
319 | micsupp->dev = arizona->dev; |
320 | |
321 | micsupp->supply.supply = "MICVDD" ; |
322 | |
323 | /* |
324 | * Since the chip usually supplies itself we provide some |
325 | * default init_data for it. This will be overridden with |
326 | * platform data if provided. |
327 | */ |
328 | switch (arizona->type) { |
329 | case WM5110: |
330 | case WM8280: |
331 | desc = &arizona_micsupp_ext; |
332 | micsupp->init_data = arizona_micsupp_ext_default; |
333 | break; |
334 | default: |
335 | desc = &arizona_micsupp; |
336 | micsupp->init_data = arizona_micsupp_default; |
337 | break; |
338 | } |
339 | |
340 | return arizona_micsupp_common_init(pdev, micsupp, desc, |
341 | pdata: &arizona->pdata.micvdd); |
342 | } |
343 | |
344 | static int madera_micsupp_probe(struct platform_device *pdev) |
345 | { |
346 | struct madera *madera = dev_get_drvdata(dev: pdev->dev.parent); |
347 | struct arizona_micsupp *micsupp; |
348 | |
349 | micsupp = devm_kzalloc(dev: &pdev->dev, size: sizeof(*micsupp), GFP_KERNEL); |
350 | if (!micsupp) |
351 | return -ENOMEM; |
352 | |
353 | micsupp->regmap = madera->regmap; |
354 | micsupp->dapm = &madera->dapm; |
355 | micsupp->dev = madera->dev; |
356 | micsupp->init_data = arizona_micsupp_ext_default; |
357 | |
358 | micsupp->supply.supply = "MICVDD" ; |
359 | |
360 | return arizona_micsupp_common_init(pdev, micsupp, desc: &madera_micsupp, |
361 | pdata: &madera->pdata.micvdd); |
362 | } |
363 | |
364 | static struct platform_driver arizona_micsupp_driver = { |
365 | .probe = arizona_micsupp_probe, |
366 | .driver = { |
367 | .name = "arizona-micsupp" , |
368 | .probe_type = PROBE_FORCE_SYNCHRONOUS, |
369 | }, |
370 | }; |
371 | |
372 | static struct platform_driver madera_micsupp_driver = { |
373 | .probe = madera_micsupp_probe, |
374 | .driver = { |
375 | .name = "madera-micsupp" , |
376 | .probe_type = PROBE_FORCE_SYNCHRONOUS, |
377 | }, |
378 | }; |
379 | |
380 | static struct platform_driver * const arizona_micsupp_drivers[] = { |
381 | &arizona_micsupp_driver, |
382 | &madera_micsupp_driver, |
383 | }; |
384 | |
385 | static int __init arizona_micsupp_init(void) |
386 | { |
387 | return platform_register_drivers(arizona_micsupp_drivers, |
388 | ARRAY_SIZE(arizona_micsupp_drivers)); |
389 | } |
390 | module_init(arizona_micsupp_init); |
391 | |
392 | static void __exit arizona_micsupp_exit(void) |
393 | { |
394 | platform_unregister_drivers(drivers: arizona_micsupp_drivers, |
395 | ARRAY_SIZE(arizona_micsupp_drivers)); |
396 | } |
397 | module_exit(arizona_micsupp_exit); |
398 | |
399 | /* Module information */ |
400 | MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>" ); |
401 | MODULE_DESCRIPTION("Arizona microphone supply driver" ); |
402 | MODULE_LICENSE("GPL" ); |
403 | MODULE_ALIAS("platform:arizona-micsupp" ); |
404 | MODULE_ALIAS("platform:madera-micsupp" ); |
405 | |