[linux-2.6-block.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/slab.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 = kstrtoul(buf, 10, &ma);
	if (ret)
		return ret;

	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 = kstrtoul(buf, 10, &ma);
	if (ret)
		return ret;

	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 = power_supply_get_drvdata(psy);
	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 = power_supply_get_drvdata(psy);
	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 = power_supply_get_drvdata(psy);
	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 const struct power_supply_desc pcf50633_mbc_adapter_desc = {
	.name		= "adapter",
	.type		= POWER_SUPPLY_TYPE_MAINS,
	.properties	= power_props,
	.num_properties	= ARRAY_SIZE(power_props),
	.get_property	= &adapter_get_property,
};

static const struct power_supply_desc pcf50633_mbc_usb_desc = {
	.name		= "usb",
	.type		= POWER_SUPPLY_TYPE_USB,
	.properties	= power_props,
	.num_properties	= ARRAY_SIZE(power_props),
	.get_property	= usb_get_property,
};

static const struct power_supply_desc pcf50633_mbc_ac_desc = {
	.name		= "ac",
	.type		= POWER_SUPPLY_TYPE_MAINS,
	.properties	= power_props,
	.num_properties	= ARRAY_SIZE(power_props),
	.get_property	= ac_get_property,
};

static int pcf50633_mbc_probe(struct platform_device *pdev)
{
	struct power_supply_config psy_cfg = {};
	struct pcf50633_mbc *mbc;
	int ret;
	int i;
	u8 mbcs1;

	mbc = devm_kzalloc(&pdev->dev, 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);

	psy_cfg.supplied_to		= mbc->pcf->pdata->batteries;
	psy_cfg.num_supplicants		= mbc->pcf->pdata->num_batteries;
	psy_cfg.drv_data		= mbc;

	/* Create power supplies */
	mbc->adapter = power_supply_register(&pdev->dev,
					     &pcf50633_mbc_adapter_desc,
					     &psy_cfg);
	if (IS_ERR(mbc->adapter)) {
		dev_err(mbc->pcf->dev, "failed to register adapter\n");
		ret = PTR_ERR(mbc->adapter);
		return ret;
	}

	mbc->usb = power_supply_register(&pdev->dev, &pcf50633_mbc_usb_desc,
					 &psy_cfg);
	if (IS_ERR(mbc->usb)) {
		dev_err(mbc->pcf->dev, "failed to register usb\n");
		power_supply_unregister(mbc->adapter);
		ret = PTR_ERR(mbc->usb);
		return ret;
	}

	mbc->ac = power_supply_register(&pdev->dev, &pcf50633_mbc_ac_desc,
					&psy_cfg);
	if (IS_ERR(mbc->ac)) {
		dev_err(mbc->pcf->dev, "failed to register ac\n");
		power_supply_unregister(mbc->adapter);
		power_supply_unregister(mbc->usb);
		ret = PTR_ERR(mbc->ac);
		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 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]);

	sysfs_remove_group(&pdev->dev.kobj, &mbc_attr_group);
	power_supply_unregister(mbc->usb);
	power_supply_unregister(mbc->adapter);
	power_supply_unregister(mbc->ac);

	return 0;
}

static struct platform_driver pcf50633_mbc_driver = {
	.driver = {
		.name = "pcf50633-mbc",
	},
	.probe = pcf50633_mbc_probe,
	.remove = pcf50633_mbc_remove,
};

module_platform_driver(pcf50633_mbc_driver);

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>
5a0e3ad6	19	#include <linux/slab.h>
f5714dc9 BR	20	#include <linux/init.h>
	21	#include <linux/types.h>
	22	#include <linux/device.h>
	23	#include <linux/sysfs.h>
	24	#include <linux/platform_device.h>
	25	#include <linux/power_supply.h>
	26
	27	#include <linux/mfd/pcf50633/core.h>
	28	#include <linux/mfd/pcf50633/mbc.h>
	29
	30	struct pcf50633_mbc {
	31	struct pcf50633 *pcf;
	32
f5714dc9	33	int adapter_online;
f5714dc9 BR	34	int usb_online;
f5714dc9 BR	35
297d716f KK	36	struct power_supply *usb;
	37	struct power_supply *adapter;
	38	struct power_supply *ac;
f5714dc9 BR	39	};
	40
	41	int pcf50633_mbc_usb_curlim_set(struct pcf50633 *pcf, int ma)
	42	{
	43	struct pcf50633_mbc *mbc = platform_get_drvdata(pcf->mbc_pdev);
	44	int ret = 0;
	45	u8 bits;
9705ecc5 BR	46	int charging_start = 1;
9705ecc5 BR	47	u8 mbcs2, chgmod;
31b4ff06	48	unsigned int mbcc5;
f5714dc9	49
31b4ff06	50	if (ma >= 1000) {
f5714dc9	51	bits = PCF50633_MBCC7_USB_1000mA;
31b4ff06 BR	52	ma = 1000;
31b4ff06 BR	53	} else if (ma >= 500) {
f5714dc9	54	bits = PCF50633_MBCC7_USB_500mA;
31b4ff06 BR	55	ma = 500;
31b4ff06 BR	56	} else if (ma >= 100) {
f5714dc9	57	bits = PCF50633_MBCC7_USB_100mA;
31b4ff06 BR	58	ma = 100;
31b4ff06 BR	59	} else {
f5714dc9	60	bits = PCF50633_MBCC7_USB_SUSPEND;
9705ecc5	61	charging_start = 0;
31b4ff06	62	ma = 0;
9705ecc5	63	}
f5714dc9 BR	64
	65	ret = pcf50633_reg_set_bit_mask(pcf, PCF50633_REG_MBCC7,
	66	PCF50633_MBCC7_USB_MASK, bits);
	67	if (ret)
	68	dev_err(pcf->dev, "error setting usb curlim to %d mA\n", ma);
	69	else
	70	dev_info(pcf->dev, "usb curlim to %d mA\n", ma);
	71
31b4ff06 BR	72	/*
	73	* We limit the charging current to be the USB current limit.
	74	* The reason is that on pcf50633, when it enters PMU Standby mode,
	75	* which it does when the device goes "off", the USB current limit
	76	* reverts to the variant default. In at least one common case, that
	77	* default is 500mA. By setting the charging current to be the same
	78	* as the USB limit we set here before PMU standby, we enforce it only
	79	* using the correct amount of current even when the USB current limit
	80	* gets reset to the wrong thing
	81	*/
	82
	83	if (mbc->pcf->pdata->charger_reference_current_ma) {
	84	mbcc5 = (ma << 8) / mbc->pcf->pdata->charger_reference_current_ma;
	85	if (mbcc5 > 255)
	86	mbcc5 = 255;
	87	pcf50633_reg_write(mbc->pcf, PCF50633_REG_MBCC5, mbcc5);
	88	}
	89
c3297950	90	mbcs2 = pcf50633_reg_read(mbc->pcf, PCF50633_REG_MBCS2);
9705ecc5 BR	91	chgmod = (mbcs2 & PCF50633_MBCS2_MBC_MASK);
	92
	93	/* If chgmod == BATFULL, setting chgena has no effect.
1282b35a PF	94	* Datasheet says we need to set resume instead but when autoresume is
1282b35a PF	95	* used resume doesn't work. Clear and set chgena instead.
9705ecc5 BR	96	*/
	97	if (chgmod != PCF50633_MBCS2_MBC_BAT_FULL)
	98	pcf50633_reg_set_bit_mask(pcf, PCF50633_REG_MBCC1,
	99	PCF50633_MBCC1_CHGENA, PCF50633_MBCC1_CHGENA);
1282b35a PF	100	else {
	101	pcf50633_reg_clear_bits(pcf, PCF50633_REG_MBCC1,
	102	PCF50633_MBCC1_CHGENA);
9705ecc5	103	pcf50633_reg_set_bit_mask(pcf, PCF50633_REG_MBCC1,
1282b35a PF	104	PCF50633_MBCC1_CHGENA, PCF50633_MBCC1_CHGENA);
1282b35a PF	105	}
9705ecc5	106
297d716f	107	power_supply_changed(mbc->usb);
f5714dc9 BR	108
	109	return ret;
	110	}
	111	EXPORT_SYMBOL_GPL(pcf50633_mbc_usb_curlim_set);
	112
	113	int pcf50633_mbc_get_status(struct pcf50633 *pcf)
	114	{
	115	struct pcf50633_mbc *mbc = platform_get_drvdata(pcf->mbc_pdev);
	116	int status = 0;
c3297950 PF	117	u8 chgmod;
	118
	119	if (!mbc)
	120	return 0;
	121
	122	chgmod = pcf50633_reg_read(mbc->pcf, PCF50633_REG_MBCS2)
	123	& PCF50633_MBCS2_MBC_MASK;
f5714dc9 BR	124
	125	if (mbc->usb_online)
	126	status \|= PCF50633_MBC_USB_ONLINE;
c3297950 PF	127	if (chgmod == PCF50633_MBCS2_MBC_USB_PRE \|\|
	128	chgmod == PCF50633_MBCS2_MBC_USB_PRE_WAIT \|\|
	129	chgmod == PCF50633_MBCS2_MBC_USB_FAST \|\|
	130	chgmod == PCF50633_MBCS2_MBC_USB_FAST_WAIT)
f5714dc9 BR	131	status \|= PCF50633_MBC_USB_ACTIVE;
	132	if (mbc->adapter_online)
	133	status \|= PCF50633_MBC_ADAPTER_ONLINE;
c3297950 PF	134	if (chgmod == PCF50633_MBCS2_MBC_ADP_PRE \|\|
	135	chgmod == PCF50633_MBCS2_MBC_ADP_PRE_WAIT \|\|
	136	chgmod == PCF50633_MBCS2_MBC_ADP_FAST \|\|
	137	chgmod == PCF50633_MBCS2_MBC_ADP_FAST_WAIT)
f5714dc9 BR	138	status \|= PCF50633_MBC_ADAPTER_ACTIVE;
	139
	140	return status;
	141	}
	142	EXPORT_SYMBOL_GPL(pcf50633_mbc_get_status);
	143
c3297950 PF	144	int pcf50633_mbc_get_usb_online_status(struct pcf50633 *pcf)
	145	{
	146	struct pcf50633_mbc *mbc = platform_get_drvdata(pcf->mbc_pdev);
	147
	148	if (!mbc)
	149	return 0;
	150
	151	return mbc->usb_online;
	152	}
	153	EXPORT_SYMBOL_GPL(pcf50633_mbc_get_usb_online_status);
	154
f5714dc9 BR	155	static ssize_t
	156	show_chgmode(struct device dev, struct device_attribute attr, char *buf)
	157	{
	158	struct pcf50633_mbc *mbc = dev_get_drvdata(dev);
	159
	160	u8 mbcs2 = pcf50633_reg_read(mbc->pcf, PCF50633_REG_MBCS2);
	161	u8 chgmod = (mbcs2 & PCF50633_MBCS2_MBC_MASK);
	162
	163	return sprintf(buf, "%d\n", chgmod);
	164	}
	165	static DEVICE_ATTR(chgmode, S_IRUGO, show_chgmode, NULL);
	166
	167	static ssize_t
	168	show_usblim(struct device dev, struct device_attribute attr, char *buf)
	169	{
	170	struct pcf50633_mbc *mbc = dev_get_drvdata(dev);
	171	u8 usblim = pcf50633_reg_read(mbc->pcf, PCF50633_REG_MBCC7) &
	172	PCF50633_MBCC7_USB_MASK;
	173	unsigned int ma;
	174
	175	if (usblim == PCF50633_MBCC7_USB_1000mA)
	176	ma = 1000;
	177	else if (usblim == PCF50633_MBCC7_USB_500mA)
	178	ma = 500;
	179	else if (usblim == PCF50633_MBCC7_USB_100mA)
	180	ma = 100;
	181	else
	182	ma = 0;
	183
	184	return sprintf(buf, "%u\n", ma);
	185	}
	186
	187	static ssize_t set_usblim(struct device *dev,
	188	struct device_attribute attr, const char buf, size_t count)
	189	{
	190	struct pcf50633_mbc *mbc = dev_get_drvdata(dev);
	191	unsigned long ma;
	192	int ret;
	193
4b43eb67	194	ret = kstrtoul(buf, 10, &ma);
f5714dc9	195	if (ret)
4b43eb67	196	return ret;
f5714dc9 BR	197
	198	pcf50633_mbc_usb_curlim_set(mbc->pcf, ma);
	199
	200	return count;
	201	}
	202
	203	static DEVICE_ATTR(usb_curlim, S_IRUGO \| S_IWUSR, show_usblim, set_usblim);
	204
31b4ff06 BR	205	static ssize_t
	206	show_chglim(struct device dev, struct device_attribute attr, char *buf)
	207	{
	208	struct pcf50633_mbc *mbc = dev_get_drvdata(dev);
	209	u8 mbcc5 = pcf50633_reg_read(mbc->pcf, PCF50633_REG_MBCC5);
	210	unsigned int ma;
	211
	212	if (!mbc->pcf->pdata->charger_reference_current_ma)
	213	return -ENODEV;
	214
	215	ma = (mbc->pcf->pdata->charger_reference_current_ma * mbcc5) >> 8;
	216
	217	return sprintf(buf, "%u\n", ma);
	218	}
	219
	220	static ssize_t set_chglim(struct device *dev,
	221	struct device_attribute attr, const char buf, size_t count)
	222	{
	223	struct pcf50633_mbc *mbc = dev_get_drvdata(dev);
	224	unsigned long ma;
	225	unsigned int mbcc5;
	226	int ret;
	227
	228	if (!mbc->pcf->pdata->charger_reference_current_ma)
	229	return -ENODEV;
	230
4b43eb67	231	ret = kstrtoul(buf, 10, &ma);
31b4ff06	232	if (ret)
4b43eb67	233	return ret;
31b4ff06 BR	234
	235	mbcc5 = (ma << 8) / mbc->pcf->pdata->charger_reference_current_ma;
	236	if (mbcc5 > 255)
	237	mbcc5 = 255;
	238	pcf50633_reg_write(mbc->pcf, PCF50633_REG_MBCC5, mbcc5);
	239
	240	return count;
	241	}
	242
	243	/*
	244	* This attribute allows to change MBC charging limit on the fly
	245	* independently of usb current limit. It also gets set automatically every
	246	* time usb current limit is changed.
	247	*/
	248	static DEVICE_ATTR(chg_curlim, S_IRUGO \| S_IWUSR, show_chglim, set_chglim);
	249
f5714dc9 BR	250	static struct attribute *pcf50633_mbc_sysfs_entries[] = {
	251	&dev_attr_chgmode.attr,
	252	&dev_attr_usb_curlim.attr,
31b4ff06	253	&dev_attr_chg_curlim.attr,
f5714dc9 BR	254	NULL,
	255	};
	256
	257	static struct attribute_group mbc_attr_group = {
	258	.name = NULL, /* put in device directory */
	259	.attrs = pcf50633_mbc_sysfs_entries,
	260	};
	261
	262	static void
	263	pcf50633_mbc_irq_handler(int irq, void *data)
	264	{
	265	struct pcf50633_mbc *mbc = data;
	266
	267	/* USB */
	268	if (irq == PCF50633_IRQ_USBINS) {
	269	mbc->usb_online = 1;
	270	} else if (irq == PCF50633_IRQ_USBREM) {
	271	mbc->usb_online = 0;
f5714dc9 BR	272	pcf50633_mbc_usb_curlim_set(mbc->pcf, 0);
	273	}
	274
	275	/* Adapter */
c3297950	276	if (irq == PCF50633_IRQ_ADPINS)
f5714dc9	277	mbc->adapter_online = 1;
c3297950	278	else if (irq == PCF50633_IRQ_ADPREM)
f5714dc9	279	mbc->adapter_online = 0;
f5714dc9	280
297d716f KK	281	power_supply_changed(mbc->ac);
	282	power_supply_changed(mbc->usb);
	283	power_supply_changed(mbc->adapter);
f5714dc9 BR	284
	285	if (mbc->pcf->pdata->mbc_event_callback)
	286	mbc->pcf->pdata->mbc_event_callback(mbc->pcf, irq);
	287	}
	288
	289	static int adapter_get_property(struct power_supply *psy,
	290	enum power_supply_property psp,
	291	union power_supply_propval *val)
	292	{
297d716f	293	struct pcf50633_mbc *mbc = power_supply_get_drvdata(psy);
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	{
297d716f	311	struct pcf50633_mbc *mbc = power_supply_get_drvdata(psy);
f5714dc9	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	{
297d716f	332	struct pcf50633_mbc *mbc = power_supply_get_drvdata(psy);
7677f33f SM	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
297d716f KK	368	static const struct power_supply_desc pcf50633_mbc_adapter_desc = {
	369	.name = "adapter",
	370	.type = POWER_SUPPLY_TYPE_MAINS,
	371	.properties = power_props,
	372	.num_properties = ARRAY_SIZE(power_props),
	373	.get_property = &adapter_get_property,
	374	};
	375
	376	static const struct power_supply_desc pcf50633_mbc_usb_desc = {
	377	.name = "usb",
	378	.type = POWER_SUPPLY_TYPE_USB,
	379	.properties = power_props,
	380	.num_properties = ARRAY_SIZE(power_props),
	381	.get_property = usb_get_property,
	382	};
	383
	384	static const struct power_supply_desc pcf50633_mbc_ac_desc = {
	385	.name = "ac",
	386	.type = POWER_SUPPLY_TYPE_MAINS,
	387	.properties = power_props,
	388	.num_properties = ARRAY_SIZE(power_props),
	389	.get_property = ac_get_property,
	390	};
	391
c8afa640	392	static int pcf50633_mbc_probe(struct platform_device *pdev)
f5714dc9	393	{
2dc9215d	394	struct power_supply_config psy_cfg = {};
f5714dc9	395	struct pcf50633_mbc *mbc;
f5714dc9 BR	396	int ret;
	397	int i;
	398	u8 mbcs1;
	399
c09dd7da	400	mbc = devm_kzalloc(&pdev->dev, sizeof(*mbc), GFP_KERNEL);
f5714dc9 BR	401	if (!mbc)
	402	return -ENOMEM;
	403
	404	platform_set_drvdata(pdev, mbc);
68d641ef	405	mbc->pcf = dev_to_pcf50633(pdev->dev.parent);
f5714dc9 BR	406
	407	/* Set up IRQ handlers */
	408	for (i = 0; i < ARRAY_SIZE(mbc_irq_handlers); i++)
	409	pcf50633_register_irq(mbc->pcf, mbc_irq_handlers[i],
	410	pcf50633_mbc_irq_handler, mbc);
	411
2dc9215d KK	412	psy_cfg.supplied_to = mbc->pcf->pdata->batteries;
2dc9215d KK	413	psy_cfg.num_supplicants = mbc->pcf->pdata->num_batteries;
297d716f	414	psy_cfg.drv_data = mbc;
2dc9215d	415
f5714dc9	416	/* Create power supplies */
297d716f KK	417	mbc->adapter = power_supply_register(&pdev->dev,
	418	&pcf50633_mbc_adapter_desc,
	419	&psy_cfg);
	420	if (IS_ERR(mbc->adapter)) {
f5714dc9	421	dev_err(mbc->pcf->dev, "failed to register adapter\n");
297d716f	422	ret = PTR_ERR(mbc->adapter);
f5714dc9 BR	423	return ret;
	424	}
	425
297d716f KK	426	mbc->usb = power_supply_register(&pdev->dev, &pcf50633_mbc_usb_desc,
	427	&psy_cfg);
	428	if (IS_ERR(mbc->usb)) {
f5714dc9	429	dev_err(mbc->pcf->dev, "failed to register usb\n");
297d716f KK	430	power_supply_unregister(mbc->adapter);
297d716f KK	431	ret = PTR_ERR(mbc->usb);
f5714dc9 BR	432	return ret;
	433	}
	434
297d716f KK	435	mbc->ac = power_supply_register(&pdev->dev, &pcf50633_mbc_ac_desc,
	436	&psy_cfg);
	437	if (IS_ERR(mbc->ac)) {
7677f33f	438	dev_err(mbc->pcf->dev, "failed to register ac\n");
297d716f KK	439	power_supply_unregister(mbc->adapter);
	440	power_supply_unregister(mbc->usb);
	441	ret = PTR_ERR(mbc->ac);
7677f33f SM	442	return ret;
7677f33f SM	443	}
9705ecc5	444
f5714dc9 BR	445	ret = sysfs_create_group(&pdev->dev.kobj, &mbc_attr_group);
	446	if (ret)
	447	dev_err(mbc->pcf->dev, "failed to create sysfs entries\n");
	448
	449	mbcs1 = pcf50633_reg_read(mbc->pcf, PCF50633_REG_MBCS1);
	450	if (mbcs1 & PCF50633_MBCS1_USBPRES)
	451	pcf50633_mbc_irq_handler(PCF50633_IRQ_USBINS, mbc);
	452	if (mbcs1 & PCF50633_MBCS1_ADAPTPRES)
	453	pcf50633_mbc_irq_handler(PCF50633_IRQ_ADPINS, mbc);
	454
	455	return 0;
	456	}
	457
415ec69f	458	static int pcf50633_mbc_remove(struct platform_device *pdev)
f5714dc9 BR	459	{
	460	struct pcf50633_mbc *mbc = platform_get_drvdata(pdev);
	461	int i;
	462
	463	/* Remove IRQ handlers */
	464	for (i = 0; i < ARRAY_SIZE(mbc_irq_handlers); i++)
	465	pcf50633_free_irq(mbc->pcf, mbc_irq_handlers[i]);
	466
305da8f5	467	sysfs_remove_group(&pdev->dev.kobj, &mbc_attr_group);
297d716f KK	468	power_supply_unregister(mbc->usb);
	469	power_supply_unregister(mbc->adapter);
	470	power_supply_unregister(mbc->ac);
9705ecc5	471
f5714dc9 BR	472	return 0;
	473	}
	474
	475	static struct platform_driver pcf50633_mbc_driver = {
	476	.driver = {
	477	.name = "pcf50633-mbc",
	478	},
	479	.probe = pcf50633_mbc_probe,
28ea73f4	480	.remove = pcf50633_mbc_remove,
f5714dc9 BR	481	};
f5714dc9 BR	482
300bac7f	483	module_platform_driver(pcf50633_mbc_driver);
f5714dc9 BR	484
	485	MODULE_AUTHOR("Balaji Rao <balajirrao@openmoko.org>");
	486	MODULE_DESCRIPTION("PCF50633 mbc driver");
	487	MODULE_LICENSE("GPL");
	488	MODULE_ALIAS("platform:pcf50633-mbc");