[deliverable/linux.git] / drivers / regulator / arizona-micsupp.c

/*
 * arizona-micsupp.c  --  Microphone supply for Arizona devices
 *
 * Copyright 2012 Wolfson Microelectronics PLC.
 *
 * Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
 *
 *  This program is free software; you can redistribute  it and/or modify it
 *  under  the terms of  the GNU General  Public License as published by the
 *  Free Software Foundation;  either version 2 of the  License, or (at your
 *  option) any later version.
 */

#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/init.h>
#include <linux/bitops.h>
#include <linux/err.h>
#include <linux/platform_device.h>
#include <linux/regulator/driver.h>
#include <linux/regulator/machine.h>
#include <linux/gpio.h>
#include <linux/slab.h>
#include <linux/workqueue.h>
#include <sound/soc.h>

#include <linux/mfd/arizona/core.h>
#include <linux/mfd/arizona/pdata.h>
#include <linux/mfd/arizona/registers.h>

struct arizona_micsupp {
	struct regulator_dev *regulator;
	struct arizona *arizona;

	struct regulator_consumer_supply supply;
	struct regulator_init_data init_data;

	struct work_struct check_cp_work;
};

static void arizona_micsupp_check_cp(struct work_struct *work)
{
	struct arizona_micsupp *micsupp =
		container_of(work, struct arizona_micsupp, check_cp_work);
	struct snd_soc_dapm_context *dapm = micsupp->arizona->dapm;
	struct arizona *arizona = micsupp->arizona;
	struct regmap *regmap = arizona->regmap;
	unsigned int reg;
	int ret;

	ret = regmap_read(regmap, ARIZONA_MIC_CHARGE_PUMP_1, &reg);
	if (ret != 0) {
		dev_err(arizona->dev, "Failed to read CP state: %d\n", ret);
		return;
	}

	if (dapm) {
		if ((reg & (ARIZONA_CPMIC_ENA | ARIZONA_CPMIC_BYPASS)) ==
		    ARIZONA_CPMIC_ENA)
			snd_soc_dapm_force_enable_pin(dapm, "MICSUPP");
		else
			snd_soc_dapm_disable_pin(dapm, "MICSUPP");

		snd_soc_dapm_sync(dapm);
	}
}

static int arizona_micsupp_enable(struct regulator_dev *rdev)
{
	struct arizona_micsupp *micsupp = rdev_get_drvdata(rdev);
	int ret;

	ret = regulator_enable_regmap(rdev);

	if (ret == 0)
		schedule_work(&micsupp->check_cp_work);

	return ret;
}

static int arizona_micsupp_disable(struct regulator_dev *rdev)
{
	struct arizona_micsupp *micsupp = rdev_get_drvdata(rdev);
	int ret;

	ret = regulator_disable_regmap(rdev);
	if (ret == 0)
		schedule_work(&micsupp->check_cp_work);

	return ret;
}

static int arizona_micsupp_set_bypass(struct regulator_dev *rdev, bool ena)
{
	struct arizona_micsupp *micsupp = rdev_get_drvdata(rdev);
	int ret;

	ret = regulator_set_bypass_regmap(rdev, ena);
	if (ret == 0)
		schedule_work(&micsupp->check_cp_work);

	return ret;
}

static struct regulator_ops arizona_micsupp_ops = {
	.enable = arizona_micsupp_enable,
	.disable = arizona_micsupp_disable,
	.is_enabled = regulator_is_enabled_regmap,

	.list_voltage = regulator_list_voltage_linear_range,
	.map_voltage = regulator_map_voltage_linear_range,

	.get_voltage_sel = regulator_get_voltage_sel_regmap,
	.set_voltage_sel = regulator_set_voltage_sel_regmap,

	.get_bypass = regulator_get_bypass_regmap,
	.set_bypass = arizona_micsupp_set_bypass,
};

static const struct regulator_linear_range arizona_micsupp_ranges[] = {
	REGULATOR_LINEAR_RANGE(1700000, 0,    0x1e, 50000),
	REGULATOR_LINEAR_RANGE(3300000, 0x1f, 0x1f, 0),
};

static const struct regulator_desc arizona_micsupp = {
	.name = "MICVDD",
	.supply_name = "CPVDD",
	.type = REGULATOR_VOLTAGE,
	.n_voltages = 32,
	.ops = &arizona_micsupp_ops,

	.vsel_reg = ARIZONA_LDO2_CONTROL_1,
	.vsel_mask = ARIZONA_LDO2_VSEL_MASK,
	.enable_reg = ARIZONA_MIC_CHARGE_PUMP_1,
	.enable_mask = ARIZONA_CPMIC_ENA,
	.bypass_reg = ARIZONA_MIC_CHARGE_PUMP_1,
	.bypass_mask = ARIZONA_CPMIC_BYPASS,

	.linear_ranges = arizona_micsupp_ranges,
	.n_linear_ranges = ARRAY_SIZE(arizona_micsupp_ranges),

	.enable_time = 3000,

	.owner = THIS_MODULE,
};

static const struct regulator_linear_range arizona_micsupp_ext_ranges[] = {
	REGULATOR_LINEAR_RANGE(900000,  0,    0x14, 25000),
	REGULATOR_LINEAR_RANGE(1500000, 0x15, 0x27, 100000),
};

static const struct regulator_desc arizona_micsupp_ext = {
	.name = "MICVDD",
	.supply_name = "CPVDD",
	.type = REGULATOR_VOLTAGE,
	.n_voltages = 40,
	.ops = &arizona_micsupp_ops,

	.vsel_reg = ARIZONA_LDO2_CONTROL_1,
	.vsel_mask = ARIZONA_LDO2_VSEL_MASK,
	.enable_reg = ARIZONA_MIC_CHARGE_PUMP_1,
	.enable_mask = ARIZONA_CPMIC_ENA,
	.bypass_reg = ARIZONA_MIC_CHARGE_PUMP_1,
	.bypass_mask = ARIZONA_CPMIC_BYPASS,

	.linear_ranges = arizona_micsupp_ext_ranges,
	.n_linear_ranges = ARRAY_SIZE(arizona_micsupp_ext_ranges),

	.enable_time = 3000,

	.owner = THIS_MODULE,
};

static const struct regulator_init_data arizona_micsupp_default = {
	.constraints = {
		.valid_ops_mask = REGULATOR_CHANGE_STATUS |
				REGULATOR_CHANGE_VOLTAGE |
				REGULATOR_CHANGE_BYPASS,
		.min_uV = 1700000,
		.max_uV = 3300000,
	},

	.num_consumer_supplies = 1,
};

static const struct regulator_init_data arizona_micsupp_ext_default = {
	.constraints = {
		.valid_ops_mask = REGULATOR_CHANGE_STATUS |
				REGULATOR_CHANGE_VOLTAGE |
				REGULATOR_CHANGE_BYPASS,
		.min_uV = 900000,
		.max_uV = 3300000,
	},

	.num_consumer_supplies = 1,
};

static int arizona_micsupp_probe(struct platform_device *pdev)
{
	struct arizona *arizona = dev_get_drvdata(pdev->dev.parent);
	const struct regulator_desc *desc;
	struct regulator_config config = { };
	struct arizona_micsupp *micsupp;
	int ret;

	micsupp = devm_kzalloc(&pdev->dev, sizeof(*micsupp), GFP_KERNEL);
	if (!micsupp)
		return -ENOMEM;

	micsupp->arizona = arizona;
	INIT_WORK(&micsupp->check_cp_work, arizona_micsupp_check_cp);

	/*
	 * Since the chip usually supplies itself we provide some
	 * default init_data for it.  This will be overridden with
	 * platform data if provided.
	 */
	switch (arizona->type) {
	case WM5110:
		desc = &arizona_micsupp_ext;
		micsupp->init_data = arizona_micsupp_ext_default;
		break;
	default:
		desc = &arizona_micsupp;
		micsupp->init_data = arizona_micsupp_default;
		break;
	}

	micsupp->init_data.consumer_supplies = &micsupp->supply;
	micsupp->supply.supply = "MICVDD";
	micsupp->supply.dev_name = dev_name(arizona->dev);

	config.dev = arizona->dev;
	config.driver_data = micsupp;
	config.regmap = arizona->regmap;

	if (arizona->pdata.micvdd)
		config.init_data = arizona->pdata.micvdd;
	else
		config.init_data = &micsupp->init_data;

	/* Default to regulated mode until the API supports bypass */
	regmap_update_bits(arizona->regmap, ARIZONA_MIC_CHARGE_PUMP_1,
			   ARIZONA_CPMIC_BYPASS, 0);

	micsupp->regulator = devm_regulator_register(&pdev->dev,
						     desc,
						     &config);
	if (IS_ERR(micsupp->regulator)) {
		ret = PTR_ERR(micsupp->regulator);
		dev_err(arizona->dev, "Failed to register mic supply: %d\n",
			ret);
		return ret;
	}

	platform_set_drvdata(pdev, micsupp);

	return 0;
}

static struct platform_driver arizona_micsupp_driver = {
	.probe = arizona_micsupp_probe,
	.driver		= {
		.name	= "arizona-micsupp",
		.owner	= THIS_MODULE,
	},
};

module_platform_driver(arizona_micsupp_driver);

/* Module information */
MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
MODULE_DESCRIPTION("Arizona microphone supply driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:arizona-micsupp");
Commit	Line	Data
b667a45d MB	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>
e6ed9058 MB	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
e6ed9058 MB	38	struct work_struct check_cp_work;
b667a45d MB	39	};
b667a45d MB	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, &reg);
	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,
e6ed9058 MB	107	.disable = arizona_micsupp_disable,
b667a45d MB	108	.is_enabled = regulator_is_enabled_regmap,
b667a45d MB	109
71979aa3 CK	110	.list_voltage = regulator_list_voltage_linear_range,
71979aa3 CK	111	.map_voltage = regulator_map_voltage_linear_range,
b667a45d MB	112
	113	.get_voltage_sel = regulator_get_voltage_sel_regmap,
	114	.set_voltage_sel = regulator_set_voltage_sel_regmap,
e477ce07 MB	115
e477ce07 MB	116	.get_bypass = regulator_get_bypass_regmap,
e6ed9058	117	.set_bypass = arizona_micsupp_set_bypass,
b667a45d MB	118	};
b667a45d MB	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,
e477ce07 MB	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,
95072818 MB	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 \|
9fc50a2e MB	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	{
b667a45d MB	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);
820cd31e	207	if (!micsupp)
b667a45d	208	return -ENOMEM;
b667a45d MB	209
b667a45d MB	210	micsupp->arizona = arizona;
e6ed9058	211	INIT_WORK(&micsupp->check_cp_work, arizona_micsupp_check_cp);
b667a45d MB	212
	213	/*
	214	* Since the chip usually supplies itself we provide some
	215	* default init_data for it. This will be overridden with
	216	* platform data if provided.
	217	*/
d2e7491e CK	218	switch (arizona->type) {
	219	case WM5110:
	220	desc = &arizona_micsupp_ext;
	221	micsupp->init_data = arizona_micsupp_ext_default;
	222	break;
	223	default:
	224	desc = &arizona_micsupp;
	225	micsupp->init_data = arizona_micsupp_default;
	226	break;
	227	}
	228
b667a45d MB	229	micsupp->init_data.consumer_supplies = &micsupp->supply;
	230	micsupp->supply.supply = "MICVDD";
	231	micsupp->supply.dev_name = dev_name(arizona->dev);
	232
	233	config.dev = arizona->dev;
	234	config.driver_data = micsupp;
	235	config.regmap = arizona->regmap;
	236
	237	if (arizona->pdata.micvdd)
	238	config.init_data = arizona->pdata.micvdd;
	239	else
	240	config.init_data = &micsupp->init_data;
	241
6dc027c9 MB	242	/* Default to regulated mode until the API supports bypass */
	243	regmap_update_bits(arizona->regmap, ARIZONA_MIC_CHARGE_PUMP_1,
	244	ARIZONA_CPMIC_BYPASS, 0);
	245
b6b7709c	246	micsupp->regulator = devm_regulator_register(&pdev->dev,
d2e7491e	247	desc,
b6b7709c	248	&config);
b667a45d MB	249	if (IS_ERR(micsupp->regulator)) {
	250	ret = PTR_ERR(micsupp->regulator);
	251	dev_err(arizona->dev, "Failed to register mic supply: %d\n",
	252	ret);
	253	return ret;
	254	}
	255
	256	platform_set_drvdata(pdev, micsupp);
	257
	258	return 0;
	259	}
	260
b667a45d MB	261	static struct platform_driver arizona_micsupp_driver = {
b667a45d MB	262	.probe = arizona_micsupp_probe,
b667a45d MB	263	.driver = {
	264	.name = "arizona-micsupp",
	265	.owner = THIS_MODULE,
	266	},
	267	};
	268
	269	module_platform_driver(arizona_micsupp_driver);
	270
	271	/* Module information */
	272	MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
	273	MODULE_DESCRIPTION("Arizona microphone supply driver");
	274	MODULE_LICENSE("GPL");
	275	MODULE_ALIAS("platform:arizona-micsupp");