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/* NXP PCF50606 Main Battery Charger Driver
*
* (C) 2006-2008 by Openmoko, Inc.
* Author: Balaji Rao <balajirrao@openmoko.org>
* All rights reserved.
*
* Broken down from monstrous PCF50606 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/pcf50606/core.h>
#include <linux/mfd/pcf50606/mbc.h>
struct pcf50606_mbc {
struct pcf50606 *pcf;
int charger_online;
struct power_supply charger;
};
int pcf50606_charge_fast(struct pcf50606 *pcf, int on)
{
struct pcf50606_mbc *mbc = platform_get_drvdata(pcf->mbc_pdev);
/*
* This is a fix to work around boot-time ordering problems if
* the s3c2410_udc is initialized before the pcf50606 mbc is
* ready.
*/
if (!mbc)
return -ENODEV;
if (on) {
pcf50606_reg_set_bit_mask(pcf, PCF50606_REG_MBCC1,
PCF50606_MBCC1_AUTOFST,
PCF50606_MBCC1_AUTOFST);\
mbc->charger_online = 1;
} else {
/* disable automatic fast-charge */
pcf50606_reg_clear_bits(pcf, PCF50606_REG_MBCC1,
PCF50606_MBCC1_AUTOFST);
/* switch to idle mode to abort existing charge process */
pcf50606_reg_set_bit_mask(pcf, PCF50606_REG_MBCC1,
PCF50606_MBCC1_CHGMOD_MASK,
PCF50606_MBCC1_CHGMOD_IDLE);
mbc->charger_online = 0;
}
return 0;
}
EXPORT_SYMBOL_GPL(pcf50606_charge_fast);
static ssize_t
show_charge_mode(struct device *dev, struct device_attribute *attr, char *buf)
{
struct pcf50606_mbc *mbc = dev_get_drvdata(dev);
uint8_t charge_mode = pcf50606_reg_read(mbc->pcf, PCF50606_REG_MBCC1);
charge_mode &= PCF50606_MBCC1_CHGMOD_MASK;
return sprintf(buf, "%d\n", charge_mode);
}
static ssize_t set_charge_mode(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct pcf50606_mbc *mbc = dev_get_drvdata(dev);
uint8_t mbcc1 = pcf50606_reg_read(mbc->pcf, PCF50606_REG_MBCC1);
mbcc1 &= ~PCF50606_MBCC1_CHGMOD_MASK;
if (!strcmp(buf, "qualification"))
mbcc1 |= PCF50606_MBCC1_CHGMOD_QUAL;
else if (!strcmp(buf, "pre"))
mbcc1 |= PCF50606_MBCC1_CHGMOD_PRE;
else if (!strcmp(buf, "trickle"))
mbcc1 |= PCF50606_MBCC1_CHGMOD_TRICKLE;
else if (!strcmp(buf, "fast_cccv"))
mbcc1 |= PCF50606_MBCC1_CHGMOD_FAST_CCCV;
/* We don't allow the other fast modes for security reasons */
else if (!strcmp(buf, "idle"))
mbcc1 |= PCF50606_MBCC1_CHGMOD_IDLE;
else
return -EINVAL;
pcf50606_reg_write(mbc->pcf, PCF50606_REG_MBCC1, mbcc1);
return count;
}
static DEVICE_ATTR(charge_mode, S_IRUGO, show_charge_mode, set_charge_mode);
static void
pcf50606_mbc_irq_handler(int irq, void *data)
{
struct pcf50606_mbc *mbc = data;
power_supply_changed(&mbc->charger);
if (mbc->pcf->pdata->mbc_event_callback)
mbc->pcf->pdata->mbc_event_callback(mbc->pcf, irq);
}
static int charger_get_property(struct power_supply *psy,
enum power_supply_property psp,
union power_supply_propval *val)
{
struct pcf50606_mbc *mbc = container_of(psy, struct pcf50606_mbc, charger);
int ret = 0;
switch (psp) {
case POWER_SUPPLY_PROP_ONLINE:
val->intval = mbc->charger_online;
break;
default:
ret = -EINVAL;
break;
}
return ret;
}
static enum power_supply_property power_props[] = {
POWER_SUPPLY_PROP_ONLINE,
};
static const uint8_t mbc_irq_handlers[] = {
PCF50606_IRQ_CHGINS,
PCF50606_IRQ_CHGRM,
PCF50606_IRQ_CHGFOK,
PCF50606_IRQ_CHGERR,
PCF50606_IRQ_CHGFRDY,
PCF50606_IRQ_CHGPROT,
};
static int __devinit pcf50606_mbc_probe(struct platform_device *pdev)
{
struct pcf50606_mbc *mbc;
int ret;
size_t i;
uint8_t oocs;
mbc = kzalloc(sizeof(*mbc), GFP_KERNEL);
if (!mbc)
return -ENOMEM;
mbc->pcf = dev_to_pcf50606(pdev->dev.parent);
mbc->charger.name = "charger";
mbc->charger.type = POWER_SUPPLY_TYPE_MAINS;
mbc->charger.properties = power_props;
mbc->charger.num_properties = ARRAY_SIZE(power_props);
mbc->charger.get_property = &charger_get_property;
mbc->charger.supplied_to = mbc->pcf->pdata->batteries;
mbc->charger.num_supplicants = mbc->pcf->pdata->num_batteries;
ret = power_supply_register(&pdev->dev, &mbc->charger);
if (ret) {
dev_err(mbc->pcf->dev, "failed to register charger\n");
kfree(mbc);
return ret;
}
/* Set up IRQ handlers */
for (i = 0; i < ARRAY_SIZE(mbc_irq_handlers); i++)
pcf50606_register_irq(mbc->pcf, mbc_irq_handlers[i],
pcf50606_mbc_irq_handler, mbc);
ret = sysfs_create_file(&pdev->dev.kobj, &dev_attr_charge_mode)
if (ret)
dev_err(mbc->pcf->dev, "failed to create sysfs entries\n");
oocs = pcf50606_reg_read(mbc->pcf, PCF50606_REG_OOCS);
if (oocs & PCF50606_OOCS_CHGOK)
pcf50606_mbc_irq_handler(PCF50606_IRQ_CHGINS, mbc);
platform_set_drvdata(pdev, mbc);
return 0;
}
static int __devexit pcf50606_mbc_remove(struct platform_device *pdev)
{
struct pcf50606_mbc *mbc = platform_get_drvdata(pdev);
size_t i;
/* Remove IRQ handlers */
for (i = 0; i < ARRAY_SIZE(mbc_irq_handlers); i++)
pcf50606_free_irq(mbc->pcf, mbc_irq_handlers[i]);
power_supply_unregister(&mbc->charger);
platform_set_drvdata(pdev, NULL);
kfree(mbc);
return 0;
}
static struct platform_driver pcf50606_mbc_driver = {
.driver = {
.name = "pcf50606-mbc",
.owner = THIS_MODULE,
},
.probe = pcf50606_mbc_probe,
.remove = __devexit_p(pcf50606_mbc_remove),
};
static int __init pcf50606_mbc_init(void)
{
return platform_driver_register(&pcf50606_mbc_driver);
}
module_init(pcf50606_mbc_init);
static void __exit pcf50606_mbc_exit(void)
{
platform_driver_unregister(&pcf50606_mbc_driver);
}
module_exit(pcf50606_mbc_exit);
MODULE_AUTHOR("Balaji Rao <balajirrao@openmoko.org>");
MODULE_DESCRIPTION("PCF50606 mbc driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:pcf50606-mbc");
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