arizona-micsupp.c

  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
 33struct 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
 46static 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	const struct regulator_desc *desc = micsupp->desc;
 52	unsigned int val;
 53	int ret;
 54
 55	ret = regmap_read(micsupp->regmap, desc->enable_reg, &val);
 56	if (ret != 0) {
 57		dev_err(micsupp->dev,
 58			"Failed to read CP state: %d\n", ret);
 59		return;
 60	}
 61
 62	if (dapm) {
 63		if ((val & (desc->enable_mask | desc->bypass_mask)) ==
 64		    desc->enable_mask)
 65			snd_soc_dapm_force_enable_pin(dapm, "MICSUPP");
 66		else
 67			snd_soc_dapm_disable_pin(dapm, "MICSUPP");
 68
 69		snd_soc_dapm_sync(dapm);
 70	}
 71}
 72
 73static int arizona_micsupp_enable(struct regulator_dev *rdev)
 74{
 75	struct arizona_micsupp *micsupp = rdev_get_drvdata(rdev);
 76	int ret;
 77
 78	ret = regulator_enable_regmap(rdev);
 79
 80	if (ret == 0)
 81		schedule_work(&micsupp->check_cp_work);
 82
 83	return ret;
 84}
 85
 86static int arizona_micsupp_disable(struct regulator_dev *rdev)
 87{
 88	struct arizona_micsupp *micsupp = rdev_get_drvdata(rdev);
 89	int ret;
 90
 91	ret = regulator_disable_regmap(rdev);
 92	if (ret == 0)
 93		schedule_work(&micsupp->check_cp_work);
 94
 95	return ret;
 96}
 97
 98static int arizona_micsupp_set_bypass(struct regulator_dev *rdev, bool ena)
 99{
100	struct arizona_micsupp *micsupp = rdev_get_drvdata(rdev);
101	int ret;
102
103	ret = regulator_set_bypass_regmap(rdev, ena);
104	if (ret == 0)
105		schedule_work(&micsupp->check_cp_work);
106
107	return ret;
108}
109
110static const struct regulator_ops arizona_micsupp_ops = {
111	.enable = arizona_micsupp_enable,
112	.disable = arizona_micsupp_disable,
113	.is_enabled = regulator_is_enabled_regmap,
114
115	.list_voltage = regulator_list_voltage_linear_range,
116	.map_voltage = regulator_map_voltage_linear_range,
117
118	.get_voltage_sel = regulator_get_voltage_sel_regmap,
119	.set_voltage_sel = regulator_set_voltage_sel_regmap,
120
121	.get_bypass = regulator_get_bypass_regmap,
122	.set_bypass = arizona_micsupp_set_bypass,
123};
124
125static const struct linear_range arizona_micsupp_ranges[] = {
126	REGULATOR_LINEAR_RANGE(1700000, 0,    0x1e, 50000),
127	REGULATOR_LINEAR_RANGE(3300000, 0x1f, 0x1f, 0),
128};
129
130static const struct regulator_desc arizona_micsupp = {
131	.name = "MICVDD",
132	.supply_name = "CPVDD",
133	.type = REGULATOR_VOLTAGE,
134	.n_voltages = 32,
135	.ops = &arizona_micsupp_ops,
136
137	.vsel_reg = ARIZONA_LDO2_CONTROL_1,
138	.vsel_mask = ARIZONA_LDO2_VSEL_MASK,
139	.enable_reg = ARIZONA_MIC_CHARGE_PUMP_1,
140	.enable_mask = ARIZONA_CPMIC_ENA,
141	.bypass_reg = ARIZONA_MIC_CHARGE_PUMP_1,
142	.bypass_mask = ARIZONA_CPMIC_BYPASS,
143
144	.linear_ranges = arizona_micsupp_ranges,
145	.n_linear_ranges = ARRAY_SIZE(arizona_micsupp_ranges),
146
147	.enable_time = 3000,
148
149	.owner = THIS_MODULE,
150};
151
152static const struct linear_range arizona_micsupp_ext_ranges[] = {
153	REGULATOR_LINEAR_RANGE(900000,  0,    0x14, 25000),
154	REGULATOR_LINEAR_RANGE(1500000, 0x15, 0x27, 100000),
155};
156
157static const struct regulator_desc arizona_micsupp_ext = {
158	.name = "MICVDD",
159	.supply_name = "CPVDD",
160	.type = REGULATOR_VOLTAGE,
161	.n_voltages = 40,
162	.ops = &arizona_micsupp_ops,
163
164	.vsel_reg = ARIZONA_LDO2_CONTROL_1,
165	.vsel_mask = ARIZONA_LDO2_VSEL_MASK,
166	.enable_reg = ARIZONA_MIC_CHARGE_PUMP_1,
167	.enable_mask = ARIZONA_CPMIC_ENA,
168	.bypass_reg = ARIZONA_MIC_CHARGE_PUMP_1,
169	.bypass_mask = ARIZONA_CPMIC_BYPASS,
170
171	.linear_ranges = arizona_micsupp_ext_ranges,
172	.n_linear_ranges = ARRAY_SIZE(arizona_micsupp_ext_ranges),
173
174	.enable_time = 3000,
175
176	.owner = THIS_MODULE,
177};
178
179static const struct regulator_init_data arizona_micsupp_default = {
180	.constraints = {
181		.valid_ops_mask = REGULATOR_CHANGE_STATUS |
182				REGULATOR_CHANGE_VOLTAGE |
183				REGULATOR_CHANGE_BYPASS,
184		.min_uV = 1700000,
185		.max_uV = 3300000,
186	},
187
188	.num_consumer_supplies = 1,
189};
190
191static const struct regulator_init_data arizona_micsupp_ext_default = {
192	.constraints = {
193		.valid_ops_mask = REGULATOR_CHANGE_STATUS |
194				REGULATOR_CHANGE_VOLTAGE |
195				REGULATOR_CHANGE_BYPASS,
196		.min_uV = 900000,
197		.max_uV = 3300000,
198	},
199
200	.num_consumer_supplies = 1,
201};
202
203static const struct regulator_desc madera_micsupp = {
204	.name = "MICVDD",
205	.supply_name = "CPVDD1",
206	.type = REGULATOR_VOLTAGE,
207	.n_voltages = 40,
208	.ops = &arizona_micsupp_ops,
209	.vsel_reg = MADERA_LDO2_CONTROL_1,
210	.vsel_mask = MADERA_LDO2_VSEL_MASK,
211	.enable_reg = MADERA_MIC_CHARGE_PUMP_1,
212	.enable_mask = MADERA_CPMIC_ENA,
213	.bypass_reg = MADERA_MIC_CHARGE_PUMP_1,
214	.bypass_mask = MADERA_CPMIC_BYPASS,
215
216	.linear_ranges = arizona_micsupp_ext_ranges,
217	.n_linear_ranges = ARRAY_SIZE(arizona_micsupp_ext_ranges),
218
219	.enable_time = 3000,
220
221	.owner = THIS_MODULE,
222};
223
224static int arizona_micsupp_of_get_pdata(struct arizona_micsupp_pdata *pdata,
225					struct regulator_config *config,
226					const struct regulator_desc *desc)
227{
228	struct arizona_micsupp *micsupp = config->driver_data;
229	struct device_node *np;
230	struct regulator_init_data *init_data;
231
232	np = of_get_child_by_name(config->dev->of_node, "micvdd");
233
234	if (np) {
235		config->of_node = np;
236
237		init_data = of_get_regulator_init_data(config->dev, np, desc);
238
239		if (init_data) {
240			init_data->consumer_supplies = &micsupp->supply;
241			init_data->num_consumer_supplies = 1;
242
243			pdata->init_data = init_data;
244		}
245	}
246
247	return 0;
248}
249
250static int arizona_micsupp_common_init(struct platform_device *pdev,
251				       struct arizona_micsupp *micsupp,
252				       const struct regulator_desc *desc,
253				       struct arizona_micsupp_pdata *pdata)
254{
255	struct regulator_config config = { };
256	int ret;
257
258	INIT_WORK(&micsupp->check_cp_work, arizona_micsupp_check_cp);
259
260	micsupp->init_data.consumer_supplies = &micsupp->supply;
261	micsupp->supply.dev_name = dev_name(micsupp->dev);
262	micsupp->desc = desc;
263
264	config.dev = micsupp->dev;
265	config.driver_data = micsupp;
266	config.regmap = micsupp->regmap;
267
268	if (IS_ENABLED(CONFIG_OF)) {
269		if (!dev_get_platdata(micsupp->dev)) {
270			ret = arizona_micsupp_of_get_pdata(pdata, &config,
271							   desc);
272			if (ret < 0)
273				return ret;
274		}
275	}
276
277	if (pdata->init_data)
278		config.init_data = pdata->init_data;
279	else
280		config.init_data = &micsupp->init_data;
281
282	/* Default to regulated mode */
283	regmap_update_bits(micsupp->regmap, desc->enable_reg, desc->bypass_mask, 0);
284
285	micsupp->regulator = devm_regulator_register(&pdev->dev,
286						     desc,
287						     &config);
288
289	of_node_put(config.of_node);
290
291	if (IS_ERR(micsupp->regulator)) {
292		ret = PTR_ERR(micsupp->regulator);
293		dev_err(micsupp->dev, "Failed to register mic supply: %d\n",
294			ret);
295		return ret;
296	}
297
298	platform_set_drvdata(pdev, micsupp);
299
300	return 0;
301}
302
303static int arizona_micsupp_probe(struct platform_device *pdev)
304{
305	struct arizona *arizona = dev_get_drvdata(pdev->dev.parent);
306	const struct regulator_desc *desc;
307	struct arizona_micsupp *micsupp;
308
309	micsupp = devm_kzalloc(&pdev->dev, sizeof(*micsupp), GFP_KERNEL);
310	if (!micsupp)
311		return -ENOMEM;
312
313	micsupp->regmap = arizona->regmap;
314	micsupp->dapm = &arizona->dapm;
315	micsupp->dev = arizona->dev;
316
317	micsupp->supply.supply = "MICVDD";
318
319	/*
320	 * Since the chip usually supplies itself we provide some
321	 * default init_data for it.  This will be overridden with
322	 * platform data if provided.
323	 */
324	switch (arizona->type) {
325	case WM5110:
326	case WM8280:
327		desc = &arizona_micsupp_ext;
328		micsupp->init_data = arizona_micsupp_ext_default;
329		break;
330	default:
331		desc = &arizona_micsupp;
332		micsupp->init_data = arizona_micsupp_default;
333		break;
334	}
335
336	return arizona_micsupp_common_init(pdev, micsupp, desc,
337					   &arizona->pdata.micvdd);
338}
339
340static int madera_micsupp_probe(struct platform_device *pdev)
341{
342	struct madera *madera = dev_get_drvdata(pdev->dev.parent);
343	struct arizona_micsupp *micsupp;
344
345	micsupp = devm_kzalloc(&pdev->dev, sizeof(*micsupp), GFP_KERNEL);
346	if (!micsupp)
347		return -ENOMEM;
348
349	micsupp->regmap = madera->regmap;
350	micsupp->dapm = &madera->dapm;
351	micsupp->dev = madera->dev;
352	micsupp->init_data = arizona_micsupp_ext_default;
353
354	micsupp->supply.supply = "MICVDD";
355
356	return arizona_micsupp_common_init(pdev, micsupp, &madera_micsupp,
357					   &madera->pdata.micvdd);
358}
359
360static struct platform_driver arizona_micsupp_driver = {
361	.probe = arizona_micsupp_probe,
362	.driver		= {
363		.name	= "arizona-micsupp",
364		.probe_type = PROBE_FORCE_SYNCHRONOUS,
365	},
366};
367
368static struct platform_driver madera_micsupp_driver = {
369	.probe = madera_micsupp_probe,
370	.driver		= {
371		.name	= "madera-micsupp",
372		.probe_type = PROBE_FORCE_SYNCHRONOUS,
373	},
374};
375
376static struct platform_driver * const arizona_micsupp_drivers[] = {
377	&arizona_micsupp_driver,
378	&madera_micsupp_driver,
379};
380
381static int __init arizona_micsupp_init(void)
382{
383	return platform_register_drivers(arizona_micsupp_drivers,
384					 ARRAY_SIZE(arizona_micsupp_drivers));
385}
386module_init(arizona_micsupp_init);
387
388static void __exit arizona_micsupp_exit(void)
389{
390	platform_unregister_drivers(arizona_micsupp_drivers,
391				    ARRAY_SIZE(arizona_micsupp_drivers));
392}
393module_exit(arizona_micsupp_exit);
394
395/* Module information */
396MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
397MODULE_DESCRIPTION("Arizona microphone supply driver");
398MODULE_LICENSE("GPL");
399MODULE_ALIAS("platform:arizona-micsupp");
400MODULE_ALIAS("platform:madera-micsupp");