cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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arizona-micsupp.c (10157B)


      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	unsigned int enable_reg;
     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	struct snd_soc_component *component;
     52	unsigned int val;
     53	int ret;
     54
     55	ret = regmap_read(micsupp->regmap, micsupp->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		component = snd_soc_dapm_to_component(dapm);
     64
     65		if ((val & (ARIZONA_CPMIC_ENA | ARIZONA_CPMIC_BYPASS)) ==
     66		    ARIZONA_CPMIC_ENA)
     67			snd_soc_component_force_enable_pin(component,
     68							   "MICSUPP");
     69		else
     70			snd_soc_component_disable_pin(component, "MICSUPP");
     71
     72		snd_soc_dapm_sync(dapm);
     73	}
     74}
     75
     76static int arizona_micsupp_enable(struct regulator_dev *rdev)
     77{
     78	struct arizona_micsupp *micsupp = rdev_get_drvdata(rdev);
     79	int ret;
     80
     81	ret = regulator_enable_regmap(rdev);
     82
     83	if (ret == 0)
     84		schedule_work(&micsupp->check_cp_work);
     85
     86	return ret;
     87}
     88
     89static int arizona_micsupp_disable(struct regulator_dev *rdev)
     90{
     91	struct arizona_micsupp *micsupp = rdev_get_drvdata(rdev);
     92	int ret;
     93
     94	ret = regulator_disable_regmap(rdev);
     95	if (ret == 0)
     96		schedule_work(&micsupp->check_cp_work);
     97
     98	return ret;
     99}
    100
    101static int arizona_micsupp_set_bypass(struct regulator_dev *rdev, bool ena)
    102{
    103	struct arizona_micsupp *micsupp = rdev_get_drvdata(rdev);
    104	int ret;
    105
    106	ret = regulator_set_bypass_regmap(rdev, ena);
    107	if (ret == 0)
    108		schedule_work(&micsupp->check_cp_work);
    109
    110	return ret;
    111}
    112
    113static const struct regulator_ops arizona_micsupp_ops = {
    114	.enable = arizona_micsupp_enable,
    115	.disable = arizona_micsupp_disable,
    116	.is_enabled = regulator_is_enabled_regmap,
    117
    118	.list_voltage = regulator_list_voltage_linear_range,
    119	.map_voltage = regulator_map_voltage_linear_range,
    120
    121	.get_voltage_sel = regulator_get_voltage_sel_regmap,
    122	.set_voltage_sel = regulator_set_voltage_sel_regmap,
    123
    124	.get_bypass = regulator_get_bypass_regmap,
    125	.set_bypass = arizona_micsupp_set_bypass,
    126};
    127
    128static const struct linear_range arizona_micsupp_ranges[] = {
    129	REGULATOR_LINEAR_RANGE(1700000, 0,    0x1e, 50000),
    130	REGULATOR_LINEAR_RANGE(3300000, 0x1f, 0x1f, 0),
    131};
    132
    133static const struct regulator_desc arizona_micsupp = {
    134	.name = "MICVDD",
    135	.supply_name = "CPVDD",
    136	.type = REGULATOR_VOLTAGE,
    137	.n_voltages = 32,
    138	.ops = &arizona_micsupp_ops,
    139
    140	.vsel_reg = ARIZONA_LDO2_CONTROL_1,
    141	.vsel_mask = ARIZONA_LDO2_VSEL_MASK,
    142	.enable_reg = ARIZONA_MIC_CHARGE_PUMP_1,
    143	.enable_mask = ARIZONA_CPMIC_ENA,
    144	.bypass_reg = ARIZONA_MIC_CHARGE_PUMP_1,
    145	.bypass_mask = ARIZONA_CPMIC_BYPASS,
    146
    147	.linear_ranges = arizona_micsupp_ranges,
    148	.n_linear_ranges = ARRAY_SIZE(arizona_micsupp_ranges),
    149
    150	.enable_time = 3000,
    151
    152	.owner = THIS_MODULE,
    153};
    154
    155static const struct linear_range arizona_micsupp_ext_ranges[] = {
    156	REGULATOR_LINEAR_RANGE(900000,  0,    0x14, 25000),
    157	REGULATOR_LINEAR_RANGE(1500000, 0x15, 0x27, 100000),
    158};
    159
    160static const struct regulator_desc arizona_micsupp_ext = {
    161	.name = "MICVDD",
    162	.supply_name = "CPVDD",
    163	.type = REGULATOR_VOLTAGE,
    164	.n_voltages = 40,
    165	.ops = &arizona_micsupp_ops,
    166
    167	.vsel_reg = ARIZONA_LDO2_CONTROL_1,
    168	.vsel_mask = ARIZONA_LDO2_VSEL_MASK,
    169	.enable_reg = ARIZONA_MIC_CHARGE_PUMP_1,
    170	.enable_mask = ARIZONA_CPMIC_ENA,
    171	.bypass_reg = ARIZONA_MIC_CHARGE_PUMP_1,
    172	.bypass_mask = ARIZONA_CPMIC_BYPASS,
    173
    174	.linear_ranges = arizona_micsupp_ext_ranges,
    175	.n_linear_ranges = ARRAY_SIZE(arizona_micsupp_ext_ranges),
    176
    177	.enable_time = 3000,
    178
    179	.owner = THIS_MODULE,
    180};
    181
    182static const struct regulator_init_data arizona_micsupp_default = {
    183	.constraints = {
    184		.valid_ops_mask = REGULATOR_CHANGE_STATUS |
    185				REGULATOR_CHANGE_VOLTAGE |
    186				REGULATOR_CHANGE_BYPASS,
    187		.min_uV = 1700000,
    188		.max_uV = 3300000,
    189	},
    190
    191	.num_consumer_supplies = 1,
    192};
    193
    194static const struct regulator_init_data arizona_micsupp_ext_default = {
    195	.constraints = {
    196		.valid_ops_mask = REGULATOR_CHANGE_STATUS |
    197				REGULATOR_CHANGE_VOLTAGE |
    198				REGULATOR_CHANGE_BYPASS,
    199		.min_uV = 900000,
    200		.max_uV = 3300000,
    201	},
    202
    203	.num_consumer_supplies = 1,
    204};
    205
    206static const struct regulator_desc madera_micsupp = {
    207	.name = "MICVDD",
    208	.supply_name = "CPVDD1",
    209	.type = REGULATOR_VOLTAGE,
    210	.n_voltages = 40,
    211	.ops = &arizona_micsupp_ops,
    212
    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
    228static 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(config->dev->of_node, "micvdd");
    237
    238	if (np) {
    239		config->of_node = np;
    240
    241		init_data = of_get_regulator_init_data(config->dev, 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
    254static 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.supply = "MICVDD";
    266	micsupp->supply.dev_name = dev_name(micsupp->dev);
    267	micsupp->enable_reg = desc->enable_reg;
    268
    269	config.dev = micsupp->dev;
    270	config.driver_data = micsupp;
    271	config.regmap = micsupp->regmap;
    272
    273	if (IS_ENABLED(CONFIG_OF)) {
    274		if (!dev_get_platdata(micsupp->dev)) {
    275			ret = arizona_micsupp_of_get_pdata(pdata, &config,
    276							   desc);
    277			if (ret < 0)
    278				return ret;
    279		}
    280	}
    281
    282	if (pdata->init_data)
    283		config.init_data = pdata->init_data;
    284	else
    285		config.init_data = &micsupp->init_data;
    286
    287	/* Default to regulated mode */
    288	regmap_update_bits(micsupp->regmap, micsupp->enable_reg,
    289			   ARIZONA_CPMIC_BYPASS, 0);
    290
    291	micsupp->regulator = devm_regulator_register(&pdev->dev,
    292						     desc,
    293						     &config);
    294
    295	of_node_put(config.of_node);
    296
    297	if (IS_ERR(micsupp->regulator)) {
    298		ret = PTR_ERR(micsupp->regulator);
    299		dev_err(micsupp->dev, "Failed to register mic supply: %d\n",
    300			ret);
    301		return ret;
    302	}
    303
    304	platform_set_drvdata(pdev, micsupp);
    305
    306	return 0;
    307}
    308
    309static int arizona_micsupp_probe(struct platform_device *pdev)
    310{
    311	struct arizona *arizona = dev_get_drvdata(pdev->dev.parent);
    312	const struct regulator_desc *desc;
    313	struct arizona_micsupp *micsupp;
    314
    315	micsupp = devm_kzalloc(&pdev->dev, sizeof(*micsupp), GFP_KERNEL);
    316	if (!micsupp)
    317		return -ENOMEM;
    318
    319	micsupp->regmap = arizona->regmap;
    320	micsupp->dapm = &arizona->dapm;
    321	micsupp->dev = arizona->dev;
    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					   &arizona->pdata.micvdd);
    342}
    343
    344static int madera_micsupp_probe(struct platform_device *pdev)
    345{
    346	struct madera *madera = dev_get_drvdata(pdev->dev.parent);
    347	struct arizona_micsupp *micsupp;
    348
    349	micsupp = devm_kzalloc(&pdev->dev, 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	return arizona_micsupp_common_init(pdev, micsupp, &madera_micsupp,
    359					   &madera->pdata.micvdd);
    360}
    361
    362static struct platform_driver arizona_micsupp_driver = {
    363	.probe = arizona_micsupp_probe,
    364	.driver		= {
    365		.name	= "arizona-micsupp",
    366	},
    367};
    368
    369static struct platform_driver madera_micsupp_driver = {
    370	.probe = madera_micsupp_probe,
    371	.driver		= {
    372		.name	= "madera-micsupp",
    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");