[mirror_ubuntu-zesty-kernel.git] / drivers / power / pcf50633-charger.c

/* 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_online;
	int usb_online;

	struct power_supply usb;
	struct power_supply adapter;
	struct power_supply ac;
};

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;
	int charging_start = 1;
	u8 mbcs2, chgmod;
	unsigned int mbcc5;

	if (ma >= 1000) {
		bits = PCF50633_MBCC7_USB_1000mA;
		ma = 1000;
	} else if (ma >= 500) {
		bits = PCF50633_MBCC7_USB_500mA;
		ma = 500;
	} else if (ma >= 100) {
		bits = PCF50633_MBCC7_USB_100mA;
		ma = 100;
	} else {
		bits = PCF50633_MBCC7_USB_SUSPEND;
		charging_start = 0;
		ma = 0;
	}

	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);

	/*
	 * We limit the charging current to be the USB current limit.
	 * The reason is that on pcf50633, when it enters PMU Standby mode,
	 * which it does when the device goes "off", the USB current limit
	 * reverts to the variant default.  In at least one common case, that
	 * default is 500mA.  By setting the charging current to be the same
	 * as the USB limit we set here before PMU standby, we enforce it only
	 * using the correct amount of current even when the USB current limit
	 * gets reset to the wrong thing
	 */

	if (mbc->pcf->pdata->charger_reference_current_ma) {
		mbcc5 = (ma << 8) / mbc->pcf->pdata->charger_reference_current_ma;
		if (mbcc5 > 255)
			mbcc5 = 255;
		pcf50633_reg_write(mbc->pcf, PCF50633_REG_MBCC5, mbcc5);
	}

	mbcs2 = pcf50633_reg_read(mbc->pcf, PCF50633_REG_MBCS2);
	chgmod = (mbcs2 & PCF50633_MBCS2_MBC_MASK);

	/* If chgmod == BATFULL, setting chgena has no effect.
	 * Datasheet says we need to set resume instead but when autoresume is
	 * used resume doesn't work. Clear and set chgena instead.
	 */
	if (chgmod != PCF50633_MBCS2_MBC_BAT_FULL)
		pcf50633_reg_set_bit_mask(pcf, PCF50633_REG_MBCC1,
				PCF50633_MBCC1_CHGENA, PCF50633_MBCC1_CHGENA);
	else {
		pcf50633_reg_clear_bits(pcf, PCF50633_REG_MBCC1,
				PCF50633_MBCC1_CHGENA);
		pcf50633_reg_set_bit_mask(pcf, PCF50633_REG_MBCC1,
				PCF50633_MBCC1_CHGENA, PCF50633_MBCC1_CHGENA);
	}

	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;
	u8 chgmod;

	if (!mbc)
		return 0;

	chgmod = pcf50633_reg_read(mbc->pcf, PCF50633_REG_MBCS2)
		& PCF50633_MBCS2_MBC_MASK;

	if (mbc->usb_online)
		status |= PCF50633_MBC_USB_ONLINE;
	if (chgmod == PCF50633_MBCS2_MBC_USB_PRE ||
	    chgmod == PCF50633_MBCS2_MBC_USB_PRE_WAIT ||
	    chgmod == PCF50633_MBCS2_MBC_USB_FAST ||
	    chgmod == PCF50633_MBCS2_MBC_USB_FAST_WAIT)
		status |= PCF50633_MBC_USB_ACTIVE;
	if (mbc->adapter_online)
		status |= PCF50633_MBC_ADAPTER_ONLINE;
	if (chgmod == PCF50633_MBCS2_MBC_ADP_PRE ||
	    chgmod == PCF50633_MBCS2_MBC_ADP_PRE_WAIT ||
	    chgmod == PCF50633_MBCS2_MBC_ADP_FAST ||
	    chgmod == PCF50633_MBCS2_MBC_ADP_FAST_WAIT)
		status |= PCF50633_MBC_ADAPTER_ACTIVE;

	return status;
}
EXPORT_SYMBOL_GPL(pcf50633_mbc_get_status);

int pcf50633_mbc_get_usb_online_status(struct pcf50633 *pcf)
{
	struct pcf50633_mbc *mbc  = platform_get_drvdata(pcf->mbc_pdev);

	if (!mbc)
		return 0;

	return mbc->usb_online;
}
EXPORT_SYMBOL_GPL(pcf50633_mbc_get_usb_online_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 ssize_t
show_chglim(struct device *dev, struct device_attribute *attr, char *buf)
{
	struct pcf50633_mbc *mbc = dev_get_drvdata(dev);
	u8 mbcc5 = pcf50633_reg_read(mbc->pcf, PCF50633_REG_MBCC5);
	unsigned int ma;

	if (!mbc->pcf->pdata->charger_reference_current_ma)
		return -ENODEV;

	ma = (mbc->pcf->pdata->charger_reference_current_ma *  mbcc5) >> 8;

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

static ssize_t set_chglim(struct device *dev,
		struct device_attribute *attr, const char *buf, size_t count)
{
	struct pcf50633_mbc *mbc = dev_get_drvdata(dev);
	unsigned long ma;
	unsigned int mbcc5;
	int ret;

	if (!mbc->pcf->pdata->charger_reference_current_ma)
		return -ENODEV;

	ret = strict_strtoul(buf, 10, &ma);
	if (ret)
		return -EINVAL;

	mbcc5 = (ma << 8) / mbc->pcf->pdata->charger_reference_current_ma;
	if (mbcc5 > 255)
		mbcc5 = 255;
	pcf50633_reg_write(mbc->pcf, PCF50633_REG_MBCC5, mbcc5);

	return count;
}

/*
 * This attribute allows to change MBC charging limit on the fly
 * independently of usb current limit. It also gets set automatically every
 * time usb current limit is changed.
 */
static DEVICE_ATTR(chg_curlim, S_IRUGO | S_IWUSR, show_chglim, set_chglim);

static struct attribute *pcf50633_mbc_sysfs_entries[] = {
	&dev_attr_chgmode.attr,
	&dev_attr_usb_curlim.attr,
	&dev_attr_chg_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;
		pcf50633_mbc_usb_curlim_set(mbc->pcf, 0);
	}

	/* Adapter */
	if (irq == PCF50633_IRQ_ADPINS)
		mbc->adapter_online = 1;
	else if (irq == PCF50633_IRQ_ADPREM)
		mbc->adapter_online = 0;

	power_supply_changed(&mbc->ac);
	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, adapter);
	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;
	u8 usblim = pcf50633_reg_read(mbc->pcf, PCF50633_REG_MBCC7) &
						PCF50633_MBCC7_USB_MASK;

	switch (psp) {
	case POWER_SUPPLY_PROP_ONLINE:
		val->intval = mbc->usb_online &&
				(usblim <= PCF50633_MBCC7_USB_500mA);
		break;
	default:
		ret = -EINVAL;
		break;
	}
	return ret;
}

static int ac_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, ac);
	int ret = 0;
	u8 usblim = pcf50633_reg_read(mbc->pcf, PCF50633_REG_MBCC7) &
						PCF50633_MBCC7_USB_MASK;

	switch (psp) {
	case POWER_SUPPLY_PROP_ONLINE:
		val->intval = mbc->usb_online &&
				(usblim == PCF50633_MBCC7_USB_1000mA);
		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;
	int ret;
	int i;
	u8 mbcs1;

	mbc = kzalloc(sizeof(*mbc), GFP_KERNEL);
	if (!mbc)
		return -ENOMEM;

	platform_set_drvdata(pdev, mbc);
	mbc->pcf = dev_to_pcf50633(pdev->dev.parent);

	/* 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;

	mbc->ac.name			= "ac";
	mbc->ac.type			= POWER_SUPPLY_TYPE_MAINS;
	mbc->ac.properties		= power_props;
	mbc->ac.num_properties		= ARRAY_SIZE(power_props);
	mbc->ac.get_property		= ac_get_property;
	mbc->ac.supplied_to		= mbc->pcf->pdata->batteries;
	mbc->ac.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 = power_supply_register(&pdev->dev, &mbc->ac);
	if (ret) {
		dev_err(mbc->pcf->dev, "failed to register ac\n");
		power_supply_unregister(&mbc->adapter);
		power_supply_unregister(&mbc->usb);
		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);
	power_supply_unregister(&mbc->ac);

	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");
Commit	Line	Data
f5714dc9 BR	1	/* NXP PCF50633 Main Battery Charger Driver
	2	*
	3	* (C) 2006-2008 by Openmoko, Inc.
	4	* Author: Balaji Rao <balajirrao@openmoko.org>
	5	* All rights reserved.
	6	*
	7	* Broken down from monstrous PCF50633 driver mainly by
	8	* Harald Welte, Andy Green and Werner Almesberger
	9	*
	10	* This program is free software; you can redistribute it and/or modify it
	11	* under the terms of the GNU General Public License as published by the
	12	* Free Software Foundation; either version 2 of the License, or (at your
	13	* option) any later version.
	14	*
	15	*/
	16
	17	#include <linux/kernel.h>
	18	#include <linux/module.h>
	19	#include <linux/init.h>
	20	#include <linux/types.h>
	21	#include <linux/device.h>
	22	#include <linux/sysfs.h>
	23	#include <linux/platform_device.h>
	24	#include <linux/power_supply.h>
	25
	26	#include <linux/mfd/pcf50633/core.h>
	27	#include <linux/mfd/pcf50633/mbc.h>
	28
	29	struct pcf50633_mbc {
	30	struct pcf50633 *pcf;
	31
f5714dc9	32	int adapter_online;
f5714dc9 BR	33	int usb_online;
	34
	35	struct power_supply usb;
	36	struct power_supply adapter;
7677f33f	37	struct power_supply ac;
f5714dc9 BR	38	};
	39
	40	int pcf50633_mbc_usb_curlim_set(struct pcf50633 *pcf, int ma)
	41	{
	42	struct pcf50633_mbc *mbc = platform_get_drvdata(pcf->mbc_pdev);
	43	int ret = 0;
	44	u8 bits;
9705ecc5 BR	45	int charging_start = 1;
9705ecc5 BR	46	u8 mbcs2, chgmod;
31b4ff06	47	unsigned int mbcc5;
f5714dc9	48
31b4ff06	49	if (ma >= 1000) {
f5714dc9	50	bits = PCF50633_MBCC7_USB_1000mA;
31b4ff06 BR	51	ma = 1000;
31b4ff06 BR	52	} else if (ma >= 500) {
f5714dc9	53	bits = PCF50633_MBCC7_USB_500mA;
31b4ff06 BR	54	ma = 500;
31b4ff06 BR	55	} else if (ma >= 100) {
f5714dc9	56	bits = PCF50633_MBCC7_USB_100mA;
31b4ff06 BR	57	ma = 100;
31b4ff06 BR	58	} else {
f5714dc9	59	bits = PCF50633_MBCC7_USB_SUSPEND;
9705ecc5	60	charging_start = 0;
31b4ff06	61	ma = 0;
9705ecc5	62	}
f5714dc9 BR	63
	64	ret = pcf50633_reg_set_bit_mask(pcf, PCF50633_REG_MBCC7,
	65	PCF50633_MBCC7_USB_MASK, bits);
	66	if (ret)
	67	dev_err(pcf->dev, "error setting usb curlim to %d mA\n", ma);
	68	else
	69	dev_info(pcf->dev, "usb curlim to %d mA\n", ma);
	70
31b4ff06 BR	71	/*
	72	* We limit the charging current to be the USB current limit.
	73	* The reason is that on pcf50633, when it enters PMU Standby mode,
	74	* which it does when the device goes "off", the USB current limit
	75	* reverts to the variant default. In at least one common case, that
	76	* default is 500mA. By setting the charging current to be the same
	77	* as the USB limit we set here before PMU standby, we enforce it only
	78	* using the correct amount of current even when the USB current limit
	79	* gets reset to the wrong thing
	80	*/
	81
	82	if (mbc->pcf->pdata->charger_reference_current_ma) {
	83	mbcc5 = (ma << 8) / mbc->pcf->pdata->charger_reference_current_ma;
	84	if (mbcc5 > 255)
	85	mbcc5 = 255;
	86	pcf50633_reg_write(mbc->pcf, PCF50633_REG_MBCC5, mbcc5);
	87	}
	88
c3297950	89	mbcs2 = pcf50633_reg_read(mbc->pcf, PCF50633_REG_MBCS2);
9705ecc5 BR	90	chgmod = (mbcs2 & PCF50633_MBCS2_MBC_MASK);
	91
	92	/* If chgmod == BATFULL, setting chgena has no effect.
1282b35a PF	93	* Datasheet says we need to set resume instead but when autoresume is
1282b35a PF	94	* used resume doesn't work. Clear and set chgena instead.
9705ecc5 BR	95	*/
	96	if (chgmod != PCF50633_MBCS2_MBC_BAT_FULL)
	97	pcf50633_reg_set_bit_mask(pcf, PCF50633_REG_MBCC1,
	98	PCF50633_MBCC1_CHGENA, PCF50633_MBCC1_CHGENA);
1282b35a PF	99	else {
	100	pcf50633_reg_clear_bits(pcf, PCF50633_REG_MBCC1,
	101	PCF50633_MBCC1_CHGENA);
9705ecc5	102	pcf50633_reg_set_bit_mask(pcf, PCF50633_REG_MBCC1,
1282b35a PF	103	PCF50633_MBCC1_CHGENA, PCF50633_MBCC1_CHGENA);
1282b35a PF	104	}
9705ecc5	105
f5714dc9 BR	106	power_supply_changed(&mbc->usb);
	107
	108	return ret;
	109	}
	110	EXPORT_SYMBOL_GPL(pcf50633_mbc_usb_curlim_set);
	111
	112	int pcf50633_mbc_get_status(struct pcf50633 *pcf)
	113	{
	114	struct pcf50633_mbc *mbc = platform_get_drvdata(pcf->mbc_pdev);
	115	int status = 0;
c3297950 PF	116	u8 chgmod;
	117
	118	if (!mbc)
	119	return 0;
	120
	121	chgmod = pcf50633_reg_read(mbc->pcf, PCF50633_REG_MBCS2)
	122	& PCF50633_MBCS2_MBC_MASK;
f5714dc9 BR	123
	124	if (mbc->usb_online)
	125	status \|= PCF50633_MBC_USB_ONLINE;
c3297950 PF	126	if (chgmod == PCF50633_MBCS2_MBC_USB_PRE \|\|
	127	chgmod == PCF50633_MBCS2_MBC_USB_PRE_WAIT \|\|
	128	chgmod == PCF50633_MBCS2_MBC_USB_FAST \|\|
	129	chgmod == PCF50633_MBCS2_MBC_USB_FAST_WAIT)
f5714dc9 BR	130	status \|= PCF50633_MBC_USB_ACTIVE;
	131	if (mbc->adapter_online)
	132	status \|= PCF50633_MBC_ADAPTER_ONLINE;
c3297950 PF	133	if (chgmod == PCF50633_MBCS2_MBC_ADP_PRE \|\|
	134	chgmod == PCF50633_MBCS2_MBC_ADP_PRE_WAIT \|\|
	135	chgmod == PCF50633_MBCS2_MBC_ADP_FAST \|\|
	136	chgmod == PCF50633_MBCS2_MBC_ADP_FAST_WAIT)
f5714dc9 BR	137	status \|= PCF50633_MBC_ADAPTER_ACTIVE;
	138
	139	return status;
	140	}
	141	EXPORT_SYMBOL_GPL(pcf50633_mbc_get_status);
	142
c3297950 PF	143	int pcf50633_mbc_get_usb_online_status(struct pcf50633 *pcf)
	144	{
	145	struct pcf50633_mbc *mbc = platform_get_drvdata(pcf->mbc_pdev);
	146
	147	if (!mbc)
	148	return 0;
	149
	150	return mbc->usb_online;
	151	}
	152	EXPORT_SYMBOL_GPL(pcf50633_mbc_get_usb_online_status);
	153
f5714dc9 BR	154	static ssize_t
	155	show_chgmode(struct device dev, struct device_attribute attr, char *buf)
	156	{
	157	struct pcf50633_mbc *mbc = dev_get_drvdata(dev);
	158
	159	u8 mbcs2 = pcf50633_reg_read(mbc->pcf, PCF50633_REG_MBCS2);
	160	u8 chgmod = (mbcs2 & PCF50633_MBCS2_MBC_MASK);
	161
	162	return sprintf(buf, "%d\n", chgmod);
	163	}
	164	static DEVICE_ATTR(chgmode, S_IRUGO, show_chgmode, NULL);
	165
	166	static ssize_t
	167	show_usblim(struct device dev, struct device_attribute attr, char *buf)
	168	{
	169	struct pcf50633_mbc *mbc = dev_get_drvdata(dev);
	170	u8 usblim = pcf50633_reg_read(mbc->pcf, PCF50633_REG_MBCC7) &
	171	PCF50633_MBCC7_USB_MASK;
	172	unsigned int ma;
	173
	174	if (usblim == PCF50633_MBCC7_USB_1000mA)
	175	ma = 1000;
	176	else if (usblim == PCF50633_MBCC7_USB_500mA)
	177	ma = 500;
	178	else if (usblim == PCF50633_MBCC7_USB_100mA)
	179	ma = 100;
	180	else
	181	ma = 0;
	182
	183	return sprintf(buf, "%u\n", ma);
	184	}
	185
	186	static ssize_t set_usblim(struct device *dev,
	187	struct device_attribute attr, const char buf, size_t count)
	188	{
	189	struct pcf50633_mbc *mbc = dev_get_drvdata(dev);
	190	unsigned long ma;
	191	int ret;
	192
	193	ret = strict_strtoul(buf, 10, &ma);
	194	if (ret)
	195	return -EINVAL;
	196
	197	pcf50633_mbc_usb_curlim_set(mbc->pcf, ma);
	198
	199	return count;
	200	}
	201
	202	static DEVICE_ATTR(usb_curlim, S_IRUGO \| S_IWUSR, show_usblim, set_usblim);
	203
31b4ff06 BR	204	static ssize_t
	205	show_chglim(struct device dev, struct device_attribute attr, char *buf)
	206	{
	207	struct pcf50633_mbc *mbc = dev_get_drvdata(dev);
	208	u8 mbcc5 = pcf50633_reg_read(mbc->pcf, PCF50633_REG_MBCC5);
	209	unsigned int ma;
	210
	211	if (!mbc->pcf->pdata->charger_reference_current_ma)
	212	return -ENODEV;
	213
	214	ma = (mbc->pcf->pdata->charger_reference_current_ma * mbcc5) >> 8;
	215
	216	return sprintf(buf, "%u\n", ma);
	217	}
	218
	219	static ssize_t set_chglim(struct device *dev,
	220	struct device_attribute attr, const char buf, size_t count)
	221	{
	222	struct pcf50633_mbc *mbc = dev_get_drvdata(dev);
	223	unsigned long ma;
	224	unsigned int mbcc5;
	225	int ret;
	226
	227	if (!mbc->pcf->pdata->charger_reference_current_ma)
	228	return -ENODEV;
	229
	230	ret = strict_strtoul(buf, 10, &ma);
	231	if (ret)
	232	return -EINVAL;
	233
	234	mbcc5 = (ma << 8) / mbc->pcf->pdata->charger_reference_current_ma;
	235	if (mbcc5 > 255)
	236	mbcc5 = 255;
	237	pcf50633_reg_write(mbc->pcf, PCF50633_REG_MBCC5, mbcc5);
	238
	239	return count;
	240	}
	241
	242	/*
	243	* This attribute allows to change MBC charging limit on the fly
	244	* independently of usb current limit. It also gets set automatically every
	245	* time usb current limit is changed.
	246	*/
	247	static DEVICE_ATTR(chg_curlim, S_IRUGO \| S_IWUSR, show_chglim, set_chglim);
	248
f5714dc9 BR	249	static struct attribute *pcf50633_mbc_sysfs_entries[] = {
	250	&dev_attr_chgmode.attr,
	251	&dev_attr_usb_curlim.attr,
31b4ff06	252	&dev_attr_chg_curlim.attr,
f5714dc9 BR	253	NULL,
	254	};
	255
	256	static struct attribute_group mbc_attr_group = {
	257	.name = NULL, /* put in device directory */
	258	.attrs = pcf50633_mbc_sysfs_entries,
	259	};
	260
	261	static void
	262	pcf50633_mbc_irq_handler(int irq, void *data)
	263	{
	264	struct pcf50633_mbc *mbc = data;
	265
	266	/* USB */
	267	if (irq == PCF50633_IRQ_USBINS) {
	268	mbc->usb_online = 1;
	269	} else if (irq == PCF50633_IRQ_USBREM) {
	270	mbc->usb_online = 0;
f5714dc9 BR	271	pcf50633_mbc_usb_curlim_set(mbc->pcf, 0);
	272	}
	273
	274	/* Adapter */
c3297950	275	if (irq == PCF50633_IRQ_ADPINS)
f5714dc9	276	mbc->adapter_online = 1;
c3297950	277	else if (irq == PCF50633_IRQ_ADPREM)
f5714dc9	278	mbc->adapter_online = 0;
f5714dc9	279
7677f33f	280	power_supply_changed(&mbc->ac);
f5714dc9 BR	281	power_supply_changed(&mbc->usb);
	282	power_supply_changed(&mbc->adapter);
	283
	284	if (mbc->pcf->pdata->mbc_event_callback)
	285	mbc->pcf->pdata->mbc_event_callback(mbc->pcf, irq);
	286	}
	287
	288	static int adapter_get_property(struct power_supply *psy,
	289	enum power_supply_property psp,
	290	union power_supply_propval *val)
	291	{
ccc9c8b9 BR	292	struct pcf50633_mbc *mbc = container_of(psy,
ccc9c8b9 BR	293	struct pcf50633_mbc, adapter);
f5714dc9 BR	294	int ret = 0;
	295
	296	switch (psp) {
	297	case POWER_SUPPLY_PROP_ONLINE:
	298	val->intval = mbc->adapter_online;
	299	break;
	300	default:
	301	ret = -EINVAL;
	302	break;
	303	}
	304	return ret;
	305	}
	306
	307	static int usb_get_property(struct power_supply *psy,
	308	enum power_supply_property psp,
	309	union power_supply_propval *val)
	310	{
	311	struct pcf50633_mbc *mbc = container_of(psy, struct pcf50633_mbc, usb);
	312	int ret = 0;
7677f33f SM	313	u8 usblim = pcf50633_reg_read(mbc->pcf, PCF50633_REG_MBCC7) &
7677f33f SM	314	PCF50633_MBCC7_USB_MASK;
f5714dc9 BR	315
	316	switch (psp) {
	317	case POWER_SUPPLY_PROP_ONLINE:
7677f33f SM	318	val->intval = mbc->usb_online &&
	319	(usblim <= PCF50633_MBCC7_USB_500mA);
	320	break;
	321	default:
	322	ret = -EINVAL;
	323	break;
	324	}
	325	return ret;
	326	}
	327
	328	static int ac_get_property(struct power_supply *psy,
	329	enum power_supply_property psp,
	330	union power_supply_propval *val)
	331	{
	332	struct pcf50633_mbc *mbc = container_of(psy, struct pcf50633_mbc, ac);
	333	int ret = 0;
	334	u8 usblim = pcf50633_reg_read(mbc->pcf, PCF50633_REG_MBCC7) &
	335	PCF50633_MBCC7_USB_MASK;
f5714dc9 BR	336
	337	switch (psp) {
	338	case POWER_SUPPLY_PROP_ONLINE:
7677f33f SM	339	val->intval = mbc->usb_online &&
7677f33f SM	340	(usblim == PCF50633_MBCC7_USB_1000mA);
f5714dc9 BR	341	break;
	342	default:
	343	ret = -EINVAL;
	344	break;
	345	}
	346	return ret;
	347	}
	348
	349	static enum power_supply_property power_props[] = {
	350	POWER_SUPPLY_PROP_ONLINE,
	351	};
	352
	353	static const u8 mbc_irq_handlers[] = {
	354	PCF50633_IRQ_ADPINS,
	355	PCF50633_IRQ_ADPREM,
	356	PCF50633_IRQ_USBINS,
	357	PCF50633_IRQ_USBREM,
	358	PCF50633_IRQ_BATFULL,
	359	PCF50633_IRQ_CHGHALT,
	360	PCF50633_IRQ_THLIMON,
	361	PCF50633_IRQ_THLIMOFF,
	362	PCF50633_IRQ_USBLIMON,
	363	PCF50633_IRQ_USBLIMOFF,
	364	PCF50633_IRQ_LOWSYS,
	365	PCF50633_IRQ_LOWBAT,
	366	};
	367
	368	static int __devinit pcf50633_mbc_probe(struct platform_device *pdev)
	369	{
	370	struct pcf50633_mbc *mbc;
f5714dc9 BR	371	int ret;
	372	int i;
	373	u8 mbcs1;
	374
	375	mbc = kzalloc(sizeof(*mbc), GFP_KERNEL);
	376	if (!mbc)
	377	return -ENOMEM;
	378
	379	platform_set_drvdata(pdev, mbc);
68d641ef	380	mbc->pcf = dev_to_pcf50633(pdev->dev.parent);
f5714dc9 BR	381
	382	/* Set up IRQ handlers */
	383	for (i = 0; i < ARRAY_SIZE(mbc_irq_handlers); i++)
	384	pcf50633_register_irq(mbc->pcf, mbc_irq_handlers[i],
	385	pcf50633_mbc_irq_handler, mbc);
	386
	387	/* Create power supplies */
	388	mbc->adapter.name = "adapter";
	389	mbc->adapter.type = POWER_SUPPLY_TYPE_MAINS;
	390	mbc->adapter.properties = power_props;
	391	mbc->adapter.num_properties = ARRAY_SIZE(power_props);
	392	mbc->adapter.get_property = &adapter_get_property;
	393	mbc->adapter.supplied_to = mbc->pcf->pdata->batteries;
	394	mbc->adapter.num_supplicants = mbc->pcf->pdata->num_batteries;
	395
	396	mbc->usb.name = "usb";
	397	mbc->usb.type = POWER_SUPPLY_TYPE_USB;
	398	mbc->usb.properties = power_props;
	399	mbc->usb.num_properties = ARRAY_SIZE(power_props);
	400	mbc->usb.get_property = usb_get_property;
	401	mbc->usb.supplied_to = mbc->pcf->pdata->batteries;
	402	mbc->usb.num_supplicants = mbc->pcf->pdata->num_batteries;
	403
7677f33f SM	404	mbc->ac.name = "ac";
	405	mbc->ac.type = POWER_SUPPLY_TYPE_MAINS;
	406	mbc->ac.properties = power_props;
	407	mbc->ac.num_properties = ARRAY_SIZE(power_props);
	408	mbc->ac.get_property = ac_get_property;
	409	mbc->ac.supplied_to = mbc->pcf->pdata->batteries;
	410	mbc->ac.num_supplicants = mbc->pcf->pdata->num_batteries;
	411
f5714dc9 BR	412	ret = power_supply_register(&pdev->dev, &mbc->adapter);
	413	if (ret) {
	414	dev_err(mbc->pcf->dev, "failed to register adapter\n");
	415	kfree(mbc);
	416	return ret;
	417	}
	418
	419	ret = power_supply_register(&pdev->dev, &mbc->usb);
	420	if (ret) {
	421	dev_err(mbc->pcf->dev, "failed to register usb\n");
	422	power_supply_unregister(&mbc->adapter);
	423	kfree(mbc);
	424	return ret;
	425	}
	426
7677f33f SM	427	ret = power_supply_register(&pdev->dev, &mbc->ac);
	428	if (ret) {
	429	dev_err(mbc->pcf->dev, "failed to register ac\n");
	430	power_supply_unregister(&mbc->adapter);
	431	power_supply_unregister(&mbc->usb);
	432	kfree(mbc);
	433	return ret;
	434	}
9705ecc5	435
f5714dc9 BR	436	ret = sysfs_create_group(&pdev->dev.kobj, &mbc_attr_group);
	437	if (ret)
	438	dev_err(mbc->pcf->dev, "failed to create sysfs entries\n");
	439
	440	mbcs1 = pcf50633_reg_read(mbc->pcf, PCF50633_REG_MBCS1);
	441	if (mbcs1 & PCF50633_MBCS1_USBPRES)
	442	pcf50633_mbc_irq_handler(PCF50633_IRQ_USBINS, mbc);
	443	if (mbcs1 & PCF50633_MBCS1_ADAPTPRES)
	444	pcf50633_mbc_irq_handler(PCF50633_IRQ_ADPINS, mbc);
	445
	446	return 0;
	447	}
	448
	449	static int __devexit pcf50633_mbc_remove(struct platform_device *pdev)
	450	{
	451	struct pcf50633_mbc *mbc = platform_get_drvdata(pdev);
	452	int i;
	453
	454	/* Remove IRQ handlers */
	455	for (i = 0; i < ARRAY_SIZE(mbc_irq_handlers); i++)
	456	pcf50633_free_irq(mbc->pcf, mbc_irq_handlers[i]);
	457
	458	power_supply_unregister(&mbc->usb);
	459	power_supply_unregister(&mbc->adapter);
7677f33f	460	power_supply_unregister(&mbc->ac);
9705ecc5	461
f5714dc9 BR	462	kfree(mbc);
	463
	464	return 0;
	465	}
	466
	467	static struct platform_driver pcf50633_mbc_driver = {
	468	.driver = {
	469	.name = "pcf50633-mbc",
	470	},
	471	.probe = pcf50633_mbc_probe,
	472	.remove = __devexit_p(pcf50633_mbc_remove),
	473	};
	474
	475	static int __init pcf50633_mbc_init(void)
	476	{
	477	return platform_driver_register(&pcf50633_mbc_driver);
	478	}
	479	module_init(pcf50633_mbc_init);
	480
	481	static void __exit pcf50633_mbc_exit(void)
	482	{
	483	platform_driver_unregister(&pcf50633_mbc_driver);
	484	}
	485	module_exit(pcf50633_mbc_exit);
	486
	487	MODULE_AUTHOR("Balaji Rao <balajirrao@openmoko.org>");
	488	MODULE_DESCRIPTION("PCF50633 mbc driver");
	489	MODULE_LICENSE("GPL");
	490	MODULE_ALIAS("platform:pcf50633-mbc");