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Commit f5714dc9 authored by Balaji Rao's avatar Balaji Rao Committed by Samuel Ortiz
Browse files

power_supply: PCF50633 battery charger driver 



Signed-off-by: default avatarBalaji Rao <balajirrao@openmoko.org>
Cc: Andy Green <andy@openmoko.com>
Cc: David Woodhouse <dwmw2@infradead.org>
Acked-by: default avatarAnton Vorontsov <cbouatmailru@gmail.com>
Signed-off-by: default avatarSamuel Ortiz <sameo@openedhand.com>
parent eae854b2

drivers/power/Kconfig

+6 −0
Original line number Diff line number Diff line
@@ -82,4 +82,10 @@ config BATTERY_DA9030 
	  Say Y here to enable support for batteries charger integrated into

	  DA9030 PMIC.



config CHARGER_PCF50633

	tristate "NXP PCF50633 MBC"

	depends on MFD_PCF50633

	help

	 Say Y to include support for NXP PCF50633 Main Battery Charger.



endif # POWER_SUPPLY

drivers/power/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -25,3 +25,4 @@ obj-$(CONFIG_BATTERY_TOSA) += tosa_battery.o 
obj-$(CONFIG_BATTERY_WM97XX)	+= wm97xx_battery.o

obj-$(CONFIG_BATTERY_BQ27x00)	+= bq27x00_battery.o

obj-$(CONFIG_BATTERY_DA9030)	+= da9030_battery.o

obj-$(CONFIG_CHARGER_PCF50633)	+= pcf50633-charger.o
 
 No newline at end of file

drivers/power/pcf50633-charger.c

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/* NXP PCF50633 Main Battery Charger Driver

 *

 * (C) 2006-2008 by Openmoko, Inc.

 * Author: Balaji Rao <balajirrao@openmoko.org>

 * All rights reserved.

 *

 * Broken down from monstrous PCF50633 driver mainly by

 * Harald Welte, Andy Green and Werner Almesberger

 *

 *  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/types.h>

#include <linux/device.h>

#include <linux/sysfs.h>

#include <linux/platform_device.h>

#include <linux/power_supply.h>



#include <linux/mfd/pcf50633/core.h>

#include <linux/mfd/pcf50633/mbc.h>



struct pcf50633_mbc {

	struct pcf50633 *pcf;



	int adapter_active;

	int adapter_online;

	int usb_active;

	int usb_online;



	struct power_supply usb;

	struct power_supply adapter;

};



int pcf50633_mbc_usb_curlim_set(struct pcf50633 *pcf, int ma)

{

	struct pcf50633_mbc *mbc = platform_get_drvdata(pcf->mbc_pdev);

	int ret = 0;

	u8 bits;



	if (ma >= 1000)

		bits = PCF50633_MBCC7_USB_1000mA;

	else if (ma >= 500)

		bits = PCF50633_MBCC7_USB_500mA;

	else if (ma >= 100)

		bits = PCF50633_MBCC7_USB_100mA;

	else

		bits = PCF50633_MBCC7_USB_SUSPEND;



	ret = pcf50633_reg_set_bit_mask(pcf, PCF50633_REG_MBCC7,

					PCF50633_MBCC7_USB_MASK, bits);

	if (ret)

		dev_err(pcf->dev, "error setting usb curlim to %d mA\n", ma);

	else

		dev_info(pcf->dev, "usb curlim to %d mA\n", ma);



	power_supply_changed(&mbc->usb);



	return ret;

}

EXPORT_SYMBOL_GPL(pcf50633_mbc_usb_curlim_set);



int pcf50633_mbc_get_status(struct pcf50633 *pcf)

{

	struct pcf50633_mbc *mbc  = platform_get_drvdata(pcf->mbc_pdev);

	int status = 0;



	if (mbc->usb_online)

		status |= PCF50633_MBC_USB_ONLINE;

	if (mbc->usb_active)

		status |= PCF50633_MBC_USB_ACTIVE;

	if (mbc->adapter_online)

		status |= PCF50633_MBC_ADAPTER_ONLINE;

	if (mbc->adapter_active)

		status |= PCF50633_MBC_ADAPTER_ACTIVE;



	return status;

}

EXPORT_SYMBOL_GPL(pcf50633_mbc_get_status);



void pcf50633_mbc_set_status(struct pcf50633 *pcf, int what, int status)

{

	struct pcf50633_mbc *mbc = platform_get_drvdata(pcf->mbc_pdev);



	if (what & PCF50633_MBC_USB_ONLINE)

		mbc->usb_online = !!status;

	if (what & PCF50633_MBC_USB_ACTIVE)

		mbc->usb_active = !!status;

	if (what & PCF50633_MBC_ADAPTER_ONLINE)

		mbc->adapter_online = !!status;

	if (what & PCF50633_MBC_ADAPTER_ACTIVE)

		mbc->adapter_active = !!status;

}

EXPORT_SYMBOL_GPL(pcf50633_mbc_set_status);



static ssize_t

show_chgmode(struct device *dev, struct device_attribute *attr, char *buf)

{

	struct pcf50633_mbc *mbc = dev_get_drvdata(dev);



	u8 mbcs2 = pcf50633_reg_read(mbc->pcf, PCF50633_REG_MBCS2);

	u8 chgmod = (mbcs2 & PCF50633_MBCS2_MBC_MASK);



	return sprintf(buf, "%d\n", chgmod);

}

static DEVICE_ATTR(chgmode, S_IRUGO, show_chgmode, NULL);



static ssize_t

show_usblim(struct device *dev, struct device_attribute *attr, char *buf)

{

	struct pcf50633_mbc *mbc = dev_get_drvdata(dev);

	u8 usblim = pcf50633_reg_read(mbc->pcf, PCF50633_REG_MBCC7) &

						PCF50633_MBCC7_USB_MASK;

	unsigned int ma;



	if (usblim == PCF50633_MBCC7_USB_1000mA)

		ma = 1000;

	else if (usblim == PCF50633_MBCC7_USB_500mA)

		ma = 500;

	else if (usblim == PCF50633_MBCC7_USB_100mA)

		ma = 100;

	else

		ma = 0;



	return sprintf(buf, "%u\n", ma);

}



static ssize_t set_usblim(struct device *dev,

		struct device_attribute *attr, const char *buf, size_t count)

{

	struct pcf50633_mbc *mbc = dev_get_drvdata(dev);

	unsigned long ma;

	int ret;



	ret = strict_strtoul(buf, 10, &ma);

	if (ret)

		return -EINVAL;



	pcf50633_mbc_usb_curlim_set(mbc->pcf, ma);



	return count;

}



static DEVICE_ATTR(usb_curlim, S_IRUGO | S_IWUSR, show_usblim, set_usblim);



static struct attribute *pcf50633_mbc_sysfs_entries[] = {

	&dev_attr_chgmode.attr,

	&dev_attr_usb_curlim.attr,

	NULL,

};



static struct attribute_group mbc_attr_group = {

	.name	= NULL,			/* put in device directory */

	.attrs	= pcf50633_mbc_sysfs_entries,

};



static void

pcf50633_mbc_irq_handler(int irq, void *data)

{

	struct pcf50633_mbc *mbc = data;



	/* USB */

	if (irq == PCF50633_IRQ_USBINS) {

		mbc->usb_online = 1;

	} else if (irq == PCF50633_IRQ_USBREM) {

		mbc->usb_online = 0;

		mbc->usb_active = 0;

		pcf50633_mbc_usb_curlim_set(mbc->pcf, 0);

	}



	/* Adapter */

	if (irq == PCF50633_IRQ_ADPINS) {

		mbc->adapter_online = 1;

		mbc->adapter_active = 1;

	} else if (irq == PCF50633_IRQ_ADPREM) {

		mbc->adapter_online = 0;

		mbc->adapter_active = 0;

	}



	if (irq == PCF50633_IRQ_BATFULL) {

		mbc->usb_active = 0;

		mbc->adapter_active = 0;

	}



	power_supply_changed(&mbc->usb);

	power_supply_changed(&mbc->adapter);



	if (mbc->pcf->pdata->mbc_event_callback)

		mbc->pcf->pdata->mbc_event_callback(mbc->pcf, irq);

}



static int adapter_get_property(struct power_supply *psy,

			enum power_supply_property psp,

			union power_supply_propval *val)

{

	struct pcf50633_mbc *mbc = container_of(psy, struct pcf50633_mbc, usb);

	int ret = 0;



	switch (psp) {

	case POWER_SUPPLY_PROP_ONLINE:

		val->intval =  mbc->adapter_online;

		break;

	default:

		ret = -EINVAL;

		break;

	}

	return ret;

}



static int usb_get_property(struct power_supply *psy,

			enum power_supply_property psp,

			union power_supply_propval *val)

{

	struct pcf50633_mbc *mbc = container_of(psy, struct pcf50633_mbc, usb);

	int ret = 0;



	switch (psp) {

	case POWER_SUPPLY_PROP_ONLINE:

		val->intval = mbc->usb_online;

		break;

	default:

		ret = -EINVAL;

		break;

	}

	return ret;

}



static enum power_supply_property power_props[] = {

	POWER_SUPPLY_PROP_ONLINE,

};



static const u8 mbc_irq_handlers[] = {

	PCF50633_IRQ_ADPINS,

	PCF50633_IRQ_ADPREM,

	PCF50633_IRQ_USBINS,

	PCF50633_IRQ_USBREM,

	PCF50633_IRQ_BATFULL,

	PCF50633_IRQ_CHGHALT,

	PCF50633_IRQ_THLIMON,

	PCF50633_IRQ_THLIMOFF,

	PCF50633_IRQ_USBLIMON,

	PCF50633_IRQ_USBLIMOFF,

	PCF50633_IRQ_LOWSYS,

	PCF50633_IRQ_LOWBAT,

};



static int __devinit pcf50633_mbc_probe(struct platform_device *pdev)

{

	struct pcf50633_mbc *mbc;

	struct pcf50633_subdev_pdata *pdata = pdev->dev.platform_data;

	int ret;

	int i;

	u8 mbcs1;



	mbc = kzalloc(sizeof(*mbc), GFP_KERNEL);

	if (!mbc)

		return -ENOMEM;



	platform_set_drvdata(pdev, mbc);

	mbc->pcf = pdata->pcf;



	/* Set up IRQ handlers */

	for (i = 0; i < ARRAY_SIZE(mbc_irq_handlers); i++)

		pcf50633_register_irq(mbc->pcf, mbc_irq_handlers[i],

					pcf50633_mbc_irq_handler, mbc);



	/* Create power supplies */

	mbc->adapter.name		= "adapter";

	mbc->adapter.type		= POWER_SUPPLY_TYPE_MAINS;

	mbc->adapter.properties		= power_props;

	mbc->adapter.num_properties	= ARRAY_SIZE(power_props);

	mbc->adapter.get_property	= &adapter_get_property;

	mbc->adapter.supplied_to	= mbc->pcf->pdata->batteries;

	mbc->adapter.num_supplicants	= mbc->pcf->pdata->num_batteries;



	mbc->usb.name			= "usb";

	mbc->usb.type			= POWER_SUPPLY_TYPE_USB;

	mbc->usb.properties		= power_props;

	mbc->usb.num_properties		= ARRAY_SIZE(power_props);

	mbc->usb.get_property		= usb_get_property;

	mbc->usb.supplied_to		= mbc->pcf->pdata->batteries;

	mbc->usb.num_supplicants	= mbc->pcf->pdata->num_batteries;



	ret = power_supply_register(&pdev->dev, &mbc->adapter);

	if (ret) {

		dev_err(mbc->pcf->dev, "failed to register adapter\n");

		kfree(mbc);

		return ret;

	}



	ret = power_supply_register(&pdev->dev, &mbc->usb);

	if (ret) {

		dev_err(mbc->pcf->dev, "failed to register usb\n");

		power_supply_unregister(&mbc->adapter);

		kfree(mbc);

		return ret;

	}



	ret = sysfs_create_group(&pdev->dev.kobj, &mbc_attr_group);

	if (ret)

		dev_err(mbc->pcf->dev, "failed to create sysfs entries\n");



	mbcs1 = pcf50633_reg_read(mbc->pcf, PCF50633_REG_MBCS1);

	if (mbcs1 & PCF50633_MBCS1_USBPRES)

		pcf50633_mbc_irq_handler(PCF50633_IRQ_USBINS, mbc);

	if (mbcs1 & PCF50633_MBCS1_ADAPTPRES)

		pcf50633_mbc_irq_handler(PCF50633_IRQ_ADPINS, mbc);



	return 0;

}



static int __devexit pcf50633_mbc_remove(struct platform_device *pdev)

{

	struct pcf50633_mbc *mbc = platform_get_drvdata(pdev);

	int i;



	/* Remove IRQ handlers */

	for (i = 0; i < ARRAY_SIZE(mbc_irq_handlers); i++)

		pcf50633_free_irq(mbc->pcf, mbc_irq_handlers[i]);



	power_supply_unregister(&mbc->usb);

	power_supply_unregister(&mbc->adapter);



	kfree(mbc);



	return 0;

}



static struct platform_driver pcf50633_mbc_driver = {

	.driver = {

		.name = "pcf50633-mbc",

	},

	.probe = pcf50633_mbc_probe,

	.remove = __devexit_p(pcf50633_mbc_remove),

};



static int __init pcf50633_mbc_init(void)

{

	return platform_driver_register(&pcf50633_mbc_driver);

}

module_init(pcf50633_mbc_init);



static void __exit pcf50633_mbc_exit(void)

{

	platform_driver_unregister(&pcf50633_mbc_driver);

}

module_exit(pcf50633_mbc_exit);



MODULE_AUTHOR("Balaji Rao <balajirrao@openmoko.org>");

MODULE_DESCRIPTION("PCF50633 mbc driver");

MODULE_LICENSE("GPL");

MODULE_ALIAS("platform:pcf50633-mbc");

include/linux/mfd/pcf50633/mbc.h

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/*

 * mbc.h  -- Driver for NXP PCF50633 Main Battery Charger

 *

 * (C) 2006-2008 by Openmoko, Inc.

 * All rights reserved.

 *

 * 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.

 */



#ifndef __LINUX_MFD_PCF50633_MBC_H

#define __LINUX_MFD_PCF50633_MBC_H



#include <linux/mfd/pcf50633/core.h>

#include <linux/platform_device.h>



#define PCF50633_REG_MBCC1	0x43

#define PCF50633_REG_MBCC2	0x44

#define PCF50633_REG_MBCC3	0x45

#define PCF50633_REG_MBCC4	0x46

#define PCF50633_REG_MBCC5	0x47

#define PCF50633_REG_MBCC6	0x48

#define PCF50633_REG_MBCC7	0x49

#define PCF50633_REG_MBCC8	0x4a

#define PCF50633_REG_MBCS1	0x4b

#define PCF50633_REG_MBCS2	0x4c

#define PCF50633_REG_MBCS3	0x4d



enum pcf50633_reg_mbcc1 {

	PCF50633_MBCC1_CHGENA		= 0x01,	/* Charger enable */

	PCF50633_MBCC1_AUTOSTOP		= 0x02,

	PCF50633_MBCC1_AUTORES		= 0x04, /* automatic resume */

	PCF50633_MBCC1_RESUME		= 0x08, /* explicit resume cmd */

	PCF50633_MBCC1_RESTART		= 0x10, /* restart charging */

	PCF50633_MBCC1_PREWDTIME_60M	= 0x20,	/* max. precharging time */

	PCF50633_MBCC1_WDTIME_1H	= 0x00,

	PCF50633_MBCC1_WDTIME_2H	= 0x40,

	PCF50633_MBCC1_WDTIME_4H	= 0x80,

	PCF50633_MBCC1_WDTIME_6H	= 0xc0,

};

#define PCF50633_MBCC1_WDTIME_MASK	  0xc0



enum pcf50633_reg_mbcc2 {

	PCF50633_MBCC2_VBATCOND_2V7	= 0x00,

	PCF50633_MBCC2_VBATCOND_2V85	= 0x01,

	PCF50633_MBCC2_VBATCOND_3V0	= 0x02,

	PCF50633_MBCC2_VBATCOND_3V15	= 0x03,

	PCF50633_MBCC2_VMAX_4V		= 0x00,

	PCF50633_MBCC2_VMAX_4V20	= 0x28,

	PCF50633_MBCC2_VRESDEBTIME_64S	= 0x80,	/* debounce time (32/64sec) */

};



enum pcf50633_reg_mbcc7 {

	PCF50633_MBCC7_USB_100mA	= 0x00,

	PCF50633_MBCC7_USB_500mA	= 0x01,

	PCF50633_MBCC7_USB_1000mA	= 0x02,

	PCF50633_MBCC7_USB_SUSPEND	= 0x03,

	PCF50633_MBCC7_BATTEMP_EN	= 0x04,

	PCF50633_MBCC7_BATSYSIMAX_1A6	= 0x00,

	PCF50633_MBCC7_BATSYSIMAX_1A8	= 0x40,

	PCF50633_MBCC7_BATSYSIMAX_2A0	= 0x80,

	PCF50633_MBCC7_BATSYSIMAX_2A2	= 0xc0,

};

#define PCF50633_MBCC7_USB_MASK 0x03



enum pcf50633_reg_mbcc8 {

	PCF50633_MBCC8_USBENASUS	= 0x10,

};



enum pcf50633_reg_mbcs1 {

	PCF50633_MBCS1_USBPRES		= 0x01,

	PCF50633_MBCS1_USBOK		= 0x02,

	PCF50633_MBCS1_ADAPTPRES	= 0x04,

	PCF50633_MBCS1_ADAPTOK		= 0x08,

	PCF50633_MBCS1_TBAT_OK		= 0x00,

	PCF50633_MBCS1_TBAT_ABOVE	= 0x10,

	PCF50633_MBCS1_TBAT_BELOW	= 0x20,

	PCF50633_MBCS1_TBAT_UNDEF	= 0x30,

	PCF50633_MBCS1_PREWDTEXP	= 0x40,

	PCF50633_MBCS1_WDTEXP		= 0x80,

};



enum pcf50633_reg_mbcs2_mbcmod {

	PCF50633_MBCS2_MBC_PLAY		= 0x00,

	PCF50633_MBCS2_MBC_USB_PRE	= 0x01,

	PCF50633_MBCS2_MBC_USB_PRE_WAIT	= 0x02,

	PCF50633_MBCS2_MBC_USB_FAST	= 0x03,

	PCF50633_MBCS2_MBC_USB_FAST_WAIT = 0x04,

	PCF50633_MBCS2_MBC_USB_SUSPEND	= 0x05,

	PCF50633_MBCS2_MBC_ADP_PRE	= 0x06,

	PCF50633_MBCS2_MBC_ADP_PRE_WAIT	= 0x07,

	PCF50633_MBCS2_MBC_ADP_FAST	= 0x08,

	PCF50633_MBCS2_MBC_ADP_FAST_WAIT = 0x09,

	PCF50633_MBCS2_MBC_BAT_FULL	= 0x0a,

	PCF50633_MBCS2_MBC_HALT		= 0x0b,

};

#define PCF50633_MBCS2_MBC_MASK		0x0f

enum pcf50633_reg_mbcs2_chgstat {

	PCF50633_MBCS2_CHGS_NONE	= 0x00,

	PCF50633_MBCS2_CHGS_ADAPTER	= 0x10,

	PCF50633_MBCS2_CHGS_USB		= 0x20,

	PCF50633_MBCS2_CHGS_BOTH	= 0x30,

};

#define PCF50633_MBCS2_RESSTAT_AUTO	0x40



enum pcf50633_reg_mbcs3 {

	PCF50633_MBCS3_USBLIM_PLAY	= 0x01,

	PCF50633_MBCS3_USBLIM_CGH	= 0x02,

	PCF50633_MBCS3_TLIM_PLAY	= 0x04,

	PCF50633_MBCS3_TLIM_CHG		= 0x08,

	PCF50633_MBCS3_ILIM		= 0x10,	/* 1: Ibat > Icutoff */

	PCF50633_MBCS3_VLIM		= 0x20,	/* 1: Vbat == Vmax */

	PCF50633_MBCS3_VBATSTAT		= 0x40,	/* 1: Vbat > Vbatcond */

	PCF50633_MBCS3_VRES		= 0x80, /* 1: Vbat > Vth(RES) */

};



#define PCF50633_MBCC2_VBATCOND_MASK	  0x03

#define PCF50633_MBCC2_VMAX_MASK	  0x3c



/* Charger status */

#define PCF50633_MBC_USB_ONLINE		0x01

#define PCF50633_MBC_USB_ACTIVE		0x02

#define PCF50633_MBC_ADAPTER_ONLINE	0x04

#define PCF50633_MBC_ADAPTER_ACTIVE	0x08



int pcf50633_mbc_usb_curlim_set(struct pcf50633 *pcf, int ma);



int pcf50633_mbc_get_status(struct pcf50633 *);

void pcf50633_mbc_set_status(struct pcf50633 *, int what, int status);



#endif