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Mark Brownb667a452012-06-14 18:14:00 +01001/*
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>
Charles Keepax6f1c9c52014-05-08 17:17:38 +010019#include <linux/of.h>
Mark Brownb667a452012-06-14 18:14:00 +010020#include <linux/platform_device.h>
21#include <linux/regulator/driver.h>
22#include <linux/regulator/machine.h>
Charles Keepax36bcdf12014-04-16 10:01:41 +010023#include <linux/regulator/of_regulator.h>
Mark Brownb667a452012-06-14 18:14:00 +010024#include <linux/gpio.h>
25#include <linux/slab.h>
Mark Browne6ed9052013-01-10 19:14:11 +000026#include <linux/workqueue.h>
27#include <sound/soc.h>
Mark Brownb667a452012-06-14 18:14:00 +010028
29#include <linux/mfd/arizona/core.h>
30#include <linux/mfd/arizona/pdata.h>
31#include <linux/mfd/arizona/registers.h>
32
Mark Brownb667a452012-06-14 18:14:00 +010033struct 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;
Mark Browne6ed9052013-01-10 19:14:11 +000039
40 struct work_struct check_cp_work;
Mark Brownb667a452012-06-14 18:14:00 +010041};
42
Mark Browne6ed9052013-01-10 19:14:11 +000043static 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, &reg);
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
70static 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
83static 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
95static 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
Mark Brownb667a452012-06-14 18:14:00 +0100107static struct regulator_ops arizona_micsupp_ops = {
Mark Browne6ed9052013-01-10 19:14:11 +0000108 .enable = arizona_micsupp_enable,
109 .disable = arizona_micsupp_disable,
Mark Brownb667a452012-06-14 18:14:00 +0100110 .is_enabled = regulator_is_enabled_regmap,
111
Charles Keepax71979aa2013-11-15 13:13:32 +0000112 .list_voltage = regulator_list_voltage_linear_range,
113 .map_voltage = regulator_map_voltage_linear_range,
Mark Brownb667a452012-06-14 18:14:00 +0100114
115 .get_voltage_sel = regulator_get_voltage_sel_regmap,
116 .set_voltage_sel = regulator_set_voltage_sel_regmap,
Mark Browne477ce02012-08-27 16:04:47 -0700117
118 .get_bypass = regulator_get_bypass_regmap,
Mark Browne6ed9052013-01-10 19:14:11 +0000119 .set_bypass = arizona_micsupp_set_bypass,
Mark Brownb667a452012-06-14 18:14:00 +0100120};
121
Charles Keepax71979aa2013-11-15 13:13:32 +0000122static 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
Mark Brownb667a452012-06-14 18:14:00 +0100127static const struct regulator_desc arizona_micsupp = {
128 .name = "MICVDD",
129 .supply_name = "CPVDD",
130 .type = REGULATOR_VOLTAGE,
Charles Keepax71979aa2013-11-15 13:13:32 +0000131 .n_voltages = 32,
Mark Brownb667a452012-06-14 18:14:00 +0100132 .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,
Mark Browne477ce02012-08-27 16:04:47 -0700138 .bypass_reg = ARIZONA_MIC_CHARGE_PUMP_1,
139 .bypass_mask = ARIZONA_CPMIC_BYPASS,
Mark Brownb667a452012-06-14 18:14:00 +0100140
Charles Keepax71979aa2013-11-15 13:13:32 +0000141 .linear_ranges = arizona_micsupp_ranges,
142 .n_linear_ranges = ARRAY_SIZE(arizona_micsupp_ranges),
143
Mark Brown95072812012-11-27 14:55:49 +0000144 .enable_time = 3000,
145
Mark Brownb667a452012-06-14 18:14:00 +0100146 .owner = THIS_MODULE,
147};
148
Charles Keepaxd2e74912013-11-15 13:48:23 +0000149static 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
154static 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
Mark Brownb667a452012-06-14 18:14:00 +0100176static const struct regulator_init_data arizona_micsupp_default = {
177 .constraints = {
178 .valid_ops_mask = REGULATOR_CHANGE_STATUS |
Mark Brown9fc50a22013-01-10 19:31:47 +0000179 REGULATOR_CHANGE_VOLTAGE |
180 REGULATOR_CHANGE_BYPASS,
Mark Brownb667a452012-06-14 18:14:00 +0100181 .min_uV = 1700000,
182 .max_uV = 3300000,
183 },
184
185 .num_consumer_supplies = 1,
186};
187
Charles Keepaxd2e74912013-11-15 13:48:23 +0000188static 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
Charles Keepax36bcdf12014-04-16 10:01:41 +0100200static int arizona_micsupp_of_get_pdata(struct arizona *arizona,
Javier Martinez Canillas072e78b2014-11-10 14:43:53 +0100201 struct regulator_config *config,
202 const struct regulator_desc *desc)
Charles Keepax36bcdf12014-04-16 10:01:41 +0100203{
204 struct arizona_pdata *pdata = &arizona->pdata;
205 struct arizona_micsupp *micsupp = config->driver_data;
206 struct device_node *np;
207 struct regulator_init_data *init_data;
208
209 np = of_get_child_by_name(arizona->dev->of_node, "micvdd");
210
211 if (np) {
212 config->of_node = np;
213
Javier Martinez Canillas072e78b2014-11-10 14:43:53 +0100214 init_data = of_get_regulator_init_data(arizona->dev, np, desc);
Charles Keepax36bcdf12014-04-16 10:01:41 +0100215
216 if (init_data) {
217 init_data->consumer_supplies = &micsupp->supply;
218 init_data->num_consumer_supplies = 1;
219
220 pdata->micvdd = init_data;
221 }
222 }
223
224 return 0;
225}
226
Bill Pembertona5023572012-11-19 13:22:22 -0500227static int arizona_micsupp_probe(struct platform_device *pdev)
Mark Brownb667a452012-06-14 18:14:00 +0100228{
229 struct arizona *arizona = dev_get_drvdata(pdev->dev.parent);
Charles Keepaxd2e74912013-11-15 13:48:23 +0000230 const struct regulator_desc *desc;
Mark Brownb667a452012-06-14 18:14:00 +0100231 struct regulator_config config = { };
232 struct arizona_micsupp *micsupp;
233 int ret;
234
235 micsupp = devm_kzalloc(&pdev->dev, sizeof(*micsupp), GFP_KERNEL);
Sachin Kamat820cd312014-02-18 16:11:10 +0530236 if (!micsupp)
Mark Brownb667a452012-06-14 18:14:00 +0100237 return -ENOMEM;
Mark Brownb667a452012-06-14 18:14:00 +0100238
239 micsupp->arizona = arizona;
Mark Browne6ed9052013-01-10 19:14:11 +0000240 INIT_WORK(&micsupp->check_cp_work, arizona_micsupp_check_cp);
Mark Brownb667a452012-06-14 18:14:00 +0100241
242 /*
243 * Since the chip usually supplies itself we provide some
244 * default init_data for it. This will be overridden with
245 * platform data if provided.
246 */
Charles Keepaxd2e74912013-11-15 13:48:23 +0000247 switch (arizona->type) {
248 case WM5110:
249 desc = &arizona_micsupp_ext;
250 micsupp->init_data = arizona_micsupp_ext_default;
251 break;
252 default:
253 desc = &arizona_micsupp;
254 micsupp->init_data = arizona_micsupp_default;
255 break;
256 }
257
Mark Brownb667a452012-06-14 18:14:00 +0100258 micsupp->init_data.consumer_supplies = &micsupp->supply;
259 micsupp->supply.supply = "MICVDD";
260 micsupp->supply.dev_name = dev_name(arizona->dev);
261
262 config.dev = arizona->dev;
263 config.driver_data = micsupp;
264 config.regmap = arizona->regmap;
265
Charles Keepax36bcdf12014-04-16 10:01:41 +0100266 if (IS_ENABLED(CONFIG_OF)) {
267 if (!dev_get_platdata(arizona->dev)) {
Javier Martinez Canillas072e78b2014-11-10 14:43:53 +0100268 ret = arizona_micsupp_of_get_pdata(arizona, &config,
269 desc);
Charles Keepax36bcdf12014-04-16 10:01:41 +0100270 if (ret < 0)
271 return ret;
272 }
273 }
274
Mark Brownb667a452012-06-14 18:14:00 +0100275 if (arizona->pdata.micvdd)
276 config.init_data = arizona->pdata.micvdd;
277 else
278 config.init_data = &micsupp->init_data;
279
Mark Brown6dc027c2012-07-04 12:50:02 +0100280 /* Default to regulated mode until the API supports bypass */
281 regmap_update_bits(arizona->regmap, ARIZONA_MIC_CHARGE_PUMP_1,
282 ARIZONA_CPMIC_BYPASS, 0);
283
Mark Brownb6b77092013-08-31 11:57:00 +0100284 micsupp->regulator = devm_regulator_register(&pdev->dev,
Charles Keepaxd2e74912013-11-15 13:48:23 +0000285 desc,
Mark Brownb6b77092013-08-31 11:57:00 +0100286 &config);
Mark Brownb667a452012-06-14 18:14:00 +0100287 if (IS_ERR(micsupp->regulator)) {
288 ret = PTR_ERR(micsupp->regulator);
289 dev_err(arizona->dev, "Failed to register mic supply: %d\n",
290 ret);
291 return ret;
292 }
293
Charles Keepax36bcdf12014-04-16 10:01:41 +0100294 of_node_put(config.of_node);
295
Mark Brownb667a452012-06-14 18:14:00 +0100296 platform_set_drvdata(pdev, micsupp);
297
298 return 0;
299}
300
Mark Brownb667a452012-06-14 18:14:00 +0100301static struct platform_driver arizona_micsupp_driver = {
302 .probe = arizona_micsupp_probe,
Mark Brownb667a452012-06-14 18:14:00 +0100303 .driver = {
304 .name = "arizona-micsupp",
Mark Brownb667a452012-06-14 18:14:00 +0100305 },
306};
307
308module_platform_driver(arizona_micsupp_driver);
309
310/* Module information */
311MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
312MODULE_DESCRIPTION("Arizona microphone supply driver");
313MODULE_LICENSE("GPL");
314MODULE_ALIAS("platform:arizona-micsupp");