drivers/regulator/pcap-regulator.c - kernel/windcharger - Git at Google

 /*
  * PCAP2 Regulator Driver
  *
  * Copyright (c) 2009 Daniel Ribeiro <drwyrm@gmail.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/kernel.h>
 #include <linux/module.h>
 #include <linux/init.h>
 #include <linux/err.h>
 #include <linux/platform_device.h>
 #include <linux/regulator/driver.h>
 #include <linux/regulator/machine.h>
 #include <linux/mfd/ezx-pcap.h>

 static const u16 V1_table[] = {
 	2775, 1275, 1600, 1725, 1825, 1925, 2075, 2275,
 };

 static const u16 V2_table[] = {
 	2500, 2775,
 };

 static const u16 V3_table[] = {
 	1075, 1275, 1550, 1725, 1876, 1950, 2075, 2275,
 };

 static const u16 V4_table[] = {
 	1275, 1550, 1725, 1875, 1950, 2075, 2275, 2775,
 };

 static const u16 V5_table[] = {
 	1875, 2275, 2475, 2775,
 };

 static const u16 V6_table[] = {
 	2475, 2775,
 };

 static const u16 V7_table[] = {
 	1875, 2775,
 };

 #define V8_table V4_table

 static const u16 V9_table[] = {
 	1575, 1875, 2475, 2775,
 };

 static const u16 V10_table[] = {
 	5000,
 };

 static const u16 VAUX1_table[] = {
 	1875, 2475, 2775, 3000,
 };

 #define VAUX2_table VAUX1_table

 static const u16 VAUX3_table[] = {
 	1200, 1200, 1200, 1200, 1400, 1600, 1800, 2000,
 	2200, 2400, 2600, 2800, 3000, 3200, 3400, 3600,
 };

 static const u16 VAUX4_table[] = {
 	1800, 1800, 3000, 5000,
 };

 static const u16 VSIM_table[] = {
 	1875, 3000,
 };

 static const u16 VSIM2_table[] = {
 	1875,
 };

 static const u16 VVIB_table[] = {
 	1300, 1800, 2000, 3000,
 };

 static const u16 SW1_table[] = {
 	900, 950, 1000, 1050, 1100, 1150, 1200, 1250,
 	1300, 1350, 1400, 1450, 1500, 1600, 1875, 2250,
 };

 #define SW2_table SW1_table

 static const u16 SW3_table[] = {
 	4000, 4500, 5000, 5500,
 };

 struct pcap_regulator {
 	const u8 reg;
 	const u8 en;
 	const u8 index;
 	const u8 stby;
 	const u8 lowpwr;
 	const u8 n_voltages;
 	const u16 *voltage_table;
 };

 #define NA 0xff

 #define VREG_INFO(_vreg, _reg, _en, _index, _stby, _lowpwr)		\
 	[_vreg]	= {							\
 		.reg		= _reg,					\
 		.en		= _en,					\
 		.index		= _index,				\
 		.stby		= _stby,				\
 		.lowpwr		= _lowpwr,				\
 		.n_voltages	= ARRAY_SIZE(_vreg##_table),		\
 		.voltage_table	= _vreg##_table,			\
 	}

 static struct pcap_regulator vreg_table[] = {
 	VREG_INFO(V1,    PCAP_REG_VREG1,   1,  2,  18, 0),
 	VREG_INFO(V2,    PCAP_REG_VREG1,   5,  6,  19, 22),
 	VREG_INFO(V3,    PCAP_REG_VREG1,   7,  8,  20, 23),
 	VREG_INFO(V4,    PCAP_REG_VREG1,   11, 12, 21, 24),
 	/* V5 STBY and LOWPWR are on PCAP_REG_VREG2 */
 	VREG_INFO(V5,    PCAP_REG_VREG1,   15, 16, 12, 19),

 	VREG_INFO(V6,    PCAP_REG_VREG2,   1,  2,  14, 20),
 	VREG_INFO(V7,    PCAP_REG_VREG2,   3,  4,  15, 21),
 	VREG_INFO(V8,    PCAP_REG_VREG2,   5,  6,  16, 22),
 	VREG_INFO(V9,    PCAP_REG_VREG2,   9,  10, 17, 23),
 	VREG_INFO(V10,   PCAP_REG_VREG2,   10, NA, 18, 24),

 	VREG_INFO(VAUX1, PCAP_REG_AUXVREG, 1,  2,  22, 23),
 	/* VAUX2 ... VSIM2 STBY and LOWPWR are on PCAP_REG_LOWPWR */
 	VREG_INFO(VAUX2, PCAP_REG_AUXVREG, 4,  5,  0,  1),
 	VREG_INFO(VAUX3, PCAP_REG_AUXVREG, 7,  8,  2,  3),
 	VREG_INFO(VAUX4, PCAP_REG_AUXVREG, 12, 13, 4,  5),
 	VREG_INFO(VSIM,  PCAP_REG_AUXVREG, 17, 18, NA, 6),
 	VREG_INFO(VSIM2, PCAP_REG_AUXVREG, 16, NA, NA, 7),
 	VREG_INFO(VVIB,  PCAP_REG_AUXVREG, 19, 20, NA, NA),

 	VREG_INFO(SW1,   PCAP_REG_SWCTRL,  1,  2,  NA, NA),
 	VREG_INFO(SW2,   PCAP_REG_SWCTRL,  6,  7,  NA, NA),
 	/* SW3 STBY is on PCAP_REG_AUXVREG */
 	VREG_INFO(SW3,   PCAP_REG_SWCTRL,  11, 12, 24, NA),

 	/* SWxS used to control SWx voltage on standby */
 /*	VREG_INFO(SW1S,  PCAP_REG_LOWPWR,  NA, 12, NA, NA),
 	VREG_INFO(SW2S,  PCAP_REG_LOWPWR,  NA, 20, NA, NA), */
 };

 static int pcap_regulator_set_voltage(struct regulator_dev *rdev,
 				      int min_uV, int max_uV,
 				      unsigned *selector)
 {
 	struct pcap_regulator *vreg = &vreg_table[rdev_get_id(rdev)];
 	void *pcap = rdev_get_drvdata(rdev);
 	int uV;
 	u8 i;

 	/* the regulator doesn't support voltage switching */
 	if (vreg->n_voltages == 1)
 		return -EINVAL;

 	for (i = 0; i < vreg->n_voltages; i++) {
 		/* For V1 the first is not the best match */
 		if (i == 0 && rdev_get_id(rdev) == V1)
 			i = 1;
 		else if (i + 1 == vreg->n_voltages && rdev_get_id(rdev) == V1)
 			i = 0;

 		uV = vreg->voltage_table[i] * 1000;
 		if (min_uV <= uV && uV <= max_uV) {
 			*selector = i;
 			return ezx_pcap_set_bits(pcap, vreg->reg,
 					(vreg->n_voltages - 1) << vreg->index,
 					i << vreg->index);
 		}

 		if (i == 0 && rdev_get_id(rdev) == V1)
 			i = vreg->n_voltages - 1;
 	}

 	/* the requested voltage range is not supported by this regulator */
 	return -EINVAL;
 }

 static int pcap_regulator_get_voltage(struct regulator_dev *rdev)
 {
 	struct pcap_regulator *vreg = &vreg_table[rdev_get_id(rdev)];
 	void *pcap = rdev_get_drvdata(rdev);
 	u32 tmp;
 	int mV;

 	if (vreg->n_voltages == 1)
 		return vreg->voltage_table[0] * 1000;

 	ezx_pcap_read(pcap, vreg->reg, &tmp);
 	tmp = ((tmp >> vreg->index) & (vreg->n_voltages - 1));
 	mV = vreg->voltage_table[tmp];

 	return mV * 1000;
 }

 static int pcap_regulator_enable(struct regulator_dev *rdev)
 {
 	struct pcap_regulator *vreg = &vreg_table[rdev_get_id(rdev)];
 	void *pcap = rdev_get_drvdata(rdev);

 	if (vreg->en == NA)
 		return -EINVAL;

 	return ezx_pcap_set_bits(pcap, vreg->reg, 1 << vreg->en, 1 << vreg->en);
 }

 static int pcap_regulator_disable(struct regulator_dev *rdev)
 {
 	struct pcap_regulator *vreg = &vreg_table[rdev_get_id(rdev)];
 	void *pcap = rdev_get_drvdata(rdev);

 	if (vreg->en == NA)
 		return -EINVAL;

 	return ezx_pcap_set_bits(pcap, vreg->reg, 1 << vreg->en, 0);
 }

 static int pcap_regulator_is_enabled(struct regulator_dev *rdev)
 {
 	struct pcap_regulator *vreg = &vreg_table[rdev_get_id(rdev)];
 	void *pcap = rdev_get_drvdata(rdev);
 	u32 tmp;

 	if (vreg->en == NA)
 		return -EINVAL;

 	ezx_pcap_read(pcap, vreg->reg, &tmp);
 	return (tmp >> vreg->en) & 1;
 }

 static int pcap_regulator_list_voltage(struct regulator_dev *rdev,
 							unsigned int index)
 {
 	struct pcap_regulator *vreg = &vreg_table[rdev_get_id(rdev)];

 	return vreg->voltage_table[index] * 1000;
 }

 static struct regulator_ops pcap_regulator_ops = {
 	.list_voltage	= pcap_regulator_list_voltage,
 	.set_voltage	= pcap_regulator_set_voltage,
 	.get_voltage	= pcap_regulator_get_voltage,
 	.enable		= pcap_regulator_enable,
 	.disable	= pcap_regulator_disable,
 	.is_enabled	= pcap_regulator_is_enabled,
 };

 #define VREG(_vreg)						\
 	[_vreg]	= {						\
 		.name		= #_vreg,			\
 		.id		= _vreg,			\
 		.n_voltages	= ARRAY_SIZE(_vreg##_table),	\
 		.ops		= &pcap_regulator_ops,		\
 		.type		= REGULATOR_VOLTAGE,		\
 		.owner		= THIS_MODULE,			\
 	}

 static struct regulator_desc pcap_regulators[] = {
 	VREG(V1), VREG(V2), VREG(V3), VREG(V4), VREG(V5), VREG(V6), VREG(V7),
 	VREG(V8), VREG(V9), VREG(V10), VREG(VAUX1), VREG(VAUX2), VREG(VAUX3),
 	VREG(VAUX4), VREG(VSIM), VREG(VSIM2), VREG(VVIB), VREG(SW1), VREG(SW2),
 };

 static int __devinit pcap_regulator_probe(struct platform_device *pdev)
 {
 	struct regulator_dev *rdev;
 	void *pcap = dev_get_drvdata(pdev->dev.parent);

 	rdev = regulator_register(&pcap_regulators[pdev->id], &pdev->dev,
 				pdev->dev.platform_data, pcap, NULL);
 	if (IS_ERR(rdev))
 		return PTR_ERR(rdev);

 	platform_set_drvdata(pdev, rdev);

 	return 0;
 }

 static int __devexit pcap_regulator_remove(struct platform_device *pdev)
 {
 	struct regulator_dev *rdev = platform_get_drvdata(pdev);

 	regulator_unregister(rdev);
 	platform_set_drvdata(pdev, NULL);

 	return 0;
 }

 static struct platform_driver pcap_regulator_driver = {
 	.driver = {
 		.name	= "pcap-regulator",
 		.owner	= THIS_MODULE,
 	},
 	.probe	= pcap_regulator_probe,
 	.remove	= __devexit_p(pcap_regulator_remove),
 };

 static int __init pcap_regulator_init(void)
 {
 	return platform_driver_register(&pcap_regulator_driver);
 }

 static void __exit pcap_regulator_exit(void)
 {
 	platform_driver_unregister(&pcap_regulator_driver);
 }

 subsys_initcall(pcap_regulator_init);
 module_exit(pcap_regulator_exit);

 MODULE_AUTHOR("Daniel Ribeiro <drwyrm@gmail.com>");
 MODULE_DESCRIPTION("PCAP2 Regulator Driver");
 MODULE_LICENSE("GPL");
	/*
	* PCAP2 Regulator Driver
	*
	* Copyright (c) 2009 Daniel Ribeiro <drwyrm@gmail.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/kernel.h>
	#include <linux/module.h>
	#include <linux/init.h>
	#include <linux/err.h>
	#include <linux/platform_device.h>
	#include <linux/regulator/driver.h>
	#include <linux/regulator/machine.h>
	#include <linux/mfd/ezx-pcap.h>

	static const u16 V1_table[] = {
	2775, 1275, 1600, 1725, 1825, 1925, 2075, 2275,
	};

	static const u16 V2_table[] = {
	2500, 2775,
	};

	static const u16 V3_table[] = {
	1075, 1275, 1550, 1725, 1876, 1950, 2075, 2275,
	};

	static const u16 V4_table[] = {
	1275, 1550, 1725, 1875, 1950, 2075, 2275, 2775,
	};

	static const u16 V5_table[] = {
	1875, 2275, 2475, 2775,
	};

	static const u16 V6_table[] = {
	2475, 2775,
	};

	static const u16 V7_table[] = {
	1875, 2775,
	};

	#define V8_table V4_table

	static const u16 V9_table[] = {
	1575, 1875, 2475, 2775,
	};

	static const u16 V10_table[] = {
	5000,
	};

	static const u16 VAUX1_table[] = {
	1875, 2475, 2775, 3000,
	};

	#define VAUX2_table VAUX1_table

	static const u16 VAUX3_table[] = {
	1200, 1200, 1200, 1200, 1400, 1600, 1800, 2000,
	2200, 2400, 2600, 2800, 3000, 3200, 3400, 3600,
	};

	static const u16 VAUX4_table[] = {
	1800, 1800, 3000, 5000,
	};

	static const u16 VSIM_table[] = {
	1875, 3000,
	};

	static const u16 VSIM2_table[] = {
	1875,
	};

	static const u16 VVIB_table[] = {
	1300, 1800, 2000, 3000,
	};

	static const u16 SW1_table[] = {
	900, 950, 1000, 1050, 1100, 1150, 1200, 1250,
	1300, 1350, 1400, 1450, 1500, 1600, 1875, 2250,
	};

	#define SW2_table SW1_table

	static const u16 SW3_table[] = {
	4000, 4500, 5000, 5500,
	};

	struct pcap_regulator {
	const u8 reg;
	const u8 en;
	const u8 index;
	const u8 stby;
	const u8 lowpwr;
	const u8 n_voltages;
	const u16 *voltage_table;
	};

	#define NA 0xff

	#define VREG_INFO(_vreg, _reg, _en, _index, _stby, _lowpwr) \
	[_vreg] = { \
	.reg = _reg, \
	.en = _en, \
	.index = _index, \
	.stby = _stby, \
	.lowpwr = _lowpwr, \
	.n_voltages = ARRAY_SIZE(_vreg##_table), \
	.voltage_table = _vreg##_table, \
	}

	static struct pcap_regulator vreg_table[] = {
	VREG_INFO(V1, PCAP_REG_VREG1, 1, 2, 18, 0),
	VREG_INFO(V2, PCAP_REG_VREG1, 5, 6, 19, 22),
	VREG_INFO(V3, PCAP_REG_VREG1, 7, 8, 20, 23),
	VREG_INFO(V4, PCAP_REG_VREG1, 11, 12, 21, 24),
	/* V5 STBY and LOWPWR are on PCAP_REG_VREG2 */
	VREG_INFO(V5, PCAP_REG_VREG1, 15, 16, 12, 19),

	VREG_INFO(V6, PCAP_REG_VREG2, 1, 2, 14, 20),
	VREG_INFO(V7, PCAP_REG_VREG2, 3, 4, 15, 21),
	VREG_INFO(V8, PCAP_REG_VREG2, 5, 6, 16, 22),
	VREG_INFO(V9, PCAP_REG_VREG2, 9, 10, 17, 23),
	VREG_INFO(V10, PCAP_REG_VREG2, 10, NA, 18, 24),

	VREG_INFO(VAUX1, PCAP_REG_AUXVREG, 1, 2, 22, 23),
	/* VAUX2 ... VSIM2 STBY and LOWPWR are on PCAP_REG_LOWPWR */
	VREG_INFO(VAUX2, PCAP_REG_AUXVREG, 4, 5, 0, 1),
	VREG_INFO(VAUX3, PCAP_REG_AUXVREG, 7, 8, 2, 3),
	VREG_INFO(VAUX4, PCAP_REG_AUXVREG, 12, 13, 4, 5),
	VREG_INFO(VSIM, PCAP_REG_AUXVREG, 17, 18, NA, 6),
	VREG_INFO(VSIM2, PCAP_REG_AUXVREG, 16, NA, NA, 7),
	VREG_INFO(VVIB, PCAP_REG_AUXVREG, 19, 20, NA, NA),

	VREG_INFO(SW1, PCAP_REG_SWCTRL, 1, 2, NA, NA),
	VREG_INFO(SW2, PCAP_REG_SWCTRL, 6, 7, NA, NA),
	/* SW3 STBY is on PCAP_REG_AUXVREG */
	VREG_INFO(SW3, PCAP_REG_SWCTRL, 11, 12, 24, NA),

	/* SWxS used to control SWx voltage on standby */
	/* VREG_INFO(SW1S, PCAP_REG_LOWPWR, NA, 12, NA, NA),
	VREG_INFO(SW2S, PCAP_REG_LOWPWR, NA, 20, NA, NA), */
	};

	static int pcap_regulator_set_voltage(struct regulator_dev *rdev,
	int min_uV, int max_uV,
	unsigned *selector)
	{
	struct pcap_regulator *vreg = &vreg_table[rdev_get_id(rdev)];
	void *pcap = rdev_get_drvdata(rdev);
	int uV;
	u8 i;

	/* the regulator doesn't support voltage switching */
	if (vreg->n_voltages == 1)
	return -EINVAL;

	for (i = 0; i < vreg->n_voltages; i++) {
	/* For V1 the first is not the best match */
	if (i == 0 && rdev_get_id(rdev) == V1)
	i = 1;
	else if (i + 1 == vreg->n_voltages && rdev_get_id(rdev) == V1)
	i = 0;

	uV = vreg->voltage_table[i] * 1000;
	if (min_uV <= uV && uV <= max_uV) {
	*selector = i;
	return ezx_pcap_set_bits(pcap, vreg->reg,
	(vreg->n_voltages - 1) << vreg->index,
	i << vreg->index);
	}

	if (i == 0 && rdev_get_id(rdev) == V1)
	i = vreg->n_voltages - 1;
	}

	/* the requested voltage range is not supported by this regulator */
	return -EINVAL;
	}

	static int pcap_regulator_get_voltage(struct regulator_dev *rdev)
	{
	struct pcap_regulator *vreg = &vreg_table[rdev_get_id(rdev)];
	void *pcap = rdev_get_drvdata(rdev);
	u32 tmp;
	int mV;

	if (vreg->n_voltages == 1)
	return vreg->voltage_table[0] * 1000;

	ezx_pcap_read(pcap, vreg->reg, &tmp);
	tmp = ((tmp >> vreg->index) & (vreg->n_voltages - 1));
	mV = vreg->voltage_table[tmp];

	return mV * 1000;
	}

	static int pcap_regulator_enable(struct regulator_dev *rdev)
	{
	struct pcap_regulator *vreg = &vreg_table[rdev_get_id(rdev)];
	void *pcap = rdev_get_drvdata(rdev);

	if (vreg->en == NA)
	return -EINVAL;

	return ezx_pcap_set_bits(pcap, vreg->reg, 1 << vreg->en, 1 << vreg->en);
	}

	static int pcap_regulator_disable(struct regulator_dev *rdev)
	{
	struct pcap_regulator *vreg = &vreg_table[rdev_get_id(rdev)];
	void *pcap = rdev_get_drvdata(rdev);

	if (vreg->en == NA)
	return -EINVAL;

	return ezx_pcap_set_bits(pcap, vreg->reg, 1 << vreg->en, 0);
	}

	static int pcap_regulator_is_enabled(struct regulator_dev *rdev)
	{
	struct pcap_regulator *vreg = &vreg_table[rdev_get_id(rdev)];
	void *pcap = rdev_get_drvdata(rdev);
	u32 tmp;

	if (vreg->en == NA)
	return -EINVAL;

	ezx_pcap_read(pcap, vreg->reg, &tmp);
	return (tmp >> vreg->en) & 1;
	}

	static int pcap_regulator_list_voltage(struct regulator_dev *rdev,
	unsigned int index)
	{
	struct pcap_regulator *vreg = &vreg_table[rdev_get_id(rdev)];

	return vreg->voltage_table[index] * 1000;
	}

	static struct regulator_ops pcap_regulator_ops = {
	.list_voltage = pcap_regulator_list_voltage,
	.set_voltage = pcap_regulator_set_voltage,
	.get_voltage = pcap_regulator_get_voltage,
	.enable = pcap_regulator_enable,
	.disable = pcap_regulator_disable,
	.is_enabled = pcap_regulator_is_enabled,
	};

	#define VREG(_vreg) \
	[_vreg] = { \
	.name = #_vreg, \
	.id = _vreg, \
	.n_voltages = ARRAY_SIZE(_vreg##_table), \
	.ops = &pcap_regulator_ops, \
	.type = REGULATOR_VOLTAGE, \
	.owner = THIS_MODULE, \
	}

	static struct regulator_desc pcap_regulators[] = {
	VREG(V1), VREG(V2), VREG(V3), VREG(V4), VREG(V5), VREG(V6), VREG(V7),
	VREG(V8), VREG(V9), VREG(V10), VREG(VAUX1), VREG(VAUX2), VREG(VAUX3),
	VREG(VAUX4), VREG(VSIM), VREG(VSIM2), VREG(VVIB), VREG(SW1), VREG(SW2),
	};

	static int __devinit pcap_regulator_probe(struct platform_device *pdev)
	{
	struct regulator_dev *rdev;
	void *pcap = dev_get_drvdata(pdev->dev.parent);

	rdev = regulator_register(&pcap_regulators[pdev->id], &pdev->dev,
	pdev->dev.platform_data, pcap, NULL);
	if (IS_ERR(rdev))
	return PTR_ERR(rdev);

	platform_set_drvdata(pdev, rdev);

	return 0;
	}

	static int __devexit pcap_regulator_remove(struct platform_device *pdev)
	{
	struct regulator_dev *rdev = platform_get_drvdata(pdev);

	regulator_unregister(rdev);
	platform_set_drvdata(pdev, NULL);

	return 0;
	}

	static struct platform_driver pcap_regulator_driver = {
	.driver = {
	.name = "pcap-regulator",
	.owner = THIS_MODULE,
	},
	.probe = pcap_regulator_probe,
	.remove = __devexit_p(pcap_regulator_remove),
	};

	static int __init pcap_regulator_init(void)
	{
	return platform_driver_register(&pcap_regulator_driver);
	}

	static void __exit pcap_regulator_exit(void)
	{
	platform_driver_unregister(&pcap_regulator_driver);
	}

	subsys_initcall(pcap_regulator_init);
	module_exit(pcap_regulator_exit);

	MODULE_AUTHOR("Daniel Ribeiro <drwyrm@gmail.com>");
	MODULE_DESCRIPTION("PCAP2 Regulator Driver");
	MODULE_LICENSE("GPL");