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/* Philips 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.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
#include <linux/mfd/pcf50633/core.h>
#include <linux/mfd/pcf50633/mbc.h>
void pcf50633_mbc_usb_curlim_set(struct pcf50633 *pcf, int ma)
{
int ret;
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(&pcf->mbc.usb);
}
EXPORT_SYMBOL_GPL(pcf50633_mbc_usb_curlim_set);
static const char *chgmode_names[] = {
[PCF50633_MBCS2_MBC_PLAY] = "play-only",
[PCF50633_MBCS2_MBC_USB_PRE] = "pre",
[PCF50633_MBCS2_MBC_ADP_PRE] = "pre",
[PCF50633_MBCS2_MBC_USB_PRE_WAIT] = "pre-wait",
[PCF50633_MBCS2_MBC_ADP_PRE_WAIT] = "pre-wait",
[PCF50633_MBCS2_MBC_USB_FAST] = "fast",
[PCF50633_MBCS2_MBC_ADP_FAST] = "fast",
[PCF50633_MBCS2_MBC_USB_FAST_WAIT] = "fast-wait",
[PCF50633_MBCS2_MBC_ADP_FAST_WAIT] = "fast-wait",
[PCF50633_MBCS2_MBC_BAT_FULL] = "bat-full",
};
static ssize_t show_chgmode(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct pcf50633 *pcf = dev_get_drvdata(dev);
u8 mbcs2 = pcf50633_reg_read(pcf, PCF50633_REG_MBCS2);
u8 chgmod = (mbcs2 & PCF50633_MBCS2_MBC_MASK);
return sprintf(buf, "%s %d\n", chgmode_names[chgmod], chgmod);
}
static DEVICE_ATTR(chgmode, S_IRUGO | S_IWUSR, show_chgmode, NULL);
static ssize_t show_usblim(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct pcf50633 *pcf = dev_get_drvdata(dev);
u8 usblim = pcf50633_reg_read(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 DEVICE_ATTR(usb_curlim, S_IRUGO | S_IWUSR, show_usblim, NULL);
static ssize_t force_usb_limit_dangerous(struct device *dev,
struct device_attribute *attr, const char *buf, size_t count)
{
struct pcf50633 *pcf = dev_get_drvdata(dev);
unsigned long ma;
strict_strtoul(buf, 10, &ma);
pcf50633_mbc_usb_curlim_set(pcf, ma);
return count;
}
static DEVICE_ATTR(force_usb_limit_dangerous, 0600,
NULL, force_usb_limit_dangerous);
static struct attribute *mbc_sysfs_entries[] = {
&dev_attr_chgmode.attr,
&dev_attr_usb_curlim.attr,
&dev_attr_force_usb_limit_dangerous.attr,
NULL,
};
static struct attribute_group mbc_attr_group = {
.name = NULL, /* put in device directory */
.attrs = mbc_sysfs_entries,
};
static void pcf50633_mbc_irq_handler(struct pcf50633 *pcf, int irq, void *data)
{
struct pcf50633_mbc *mbc;
mbc = &pcf->mbc;
/* 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(pcf, 0);
}
/* Adapter */
if (irq == PCF50633_IRQ_ADPINS) {
pcf->mbc.adapter_online = 1;
pcf->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->ac);
power_supply_changed(&mbc->usb);
power_supply_changed(&mbc->adapter);
if (pcf->pdata->mbc_event_callback)
pcf->pdata->mbc_event_callback(pcf, irq);
}
static int adapter_get_property(struct power_supply *psy,
enum power_supply_property psp,
union power_supply_propval *val)
{
int ret = 0;
struct pcf50633_mbc *mbc = container_of(psy, struct pcf50633_mbc, usb);
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)
{
int ret = 0;
struct pcf50633_mbc *mbc = container_of(psy, struct pcf50633_mbc, usb);
struct pcf50633 *pcf = container_of(mbc, struct pcf50633, mbc);
u8 usblim = pcf50633_reg_read(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)
{
int ret = 0;
struct pcf50633_mbc *mbc = container_of(psy, struct pcf50633_mbc, ac);
struct pcf50633 *pcf = container_of(mbc, struct pcf50633, mbc);
u8 usblim = pcf50633_reg_read(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,
};
int __init pcf50633_mbc_probe(struct platform_device *pdev)
{
struct pcf50633 *pcf;
struct pcf50633_mbc *mbc;
int ret;
pcf = platform_get_drvdata(pdev);
mbc = &pcf->mbc;
/* Set up IRQ handlers */
pcf->irq_handler[PCF50633_IRQ_ADPINS].handler =
pcf50633_mbc_irq_handler;
pcf->irq_handler[PCF50633_IRQ_ADPREM].handler =
pcf50633_mbc_irq_handler;
pcf->irq_handler[PCF50633_IRQ_USBINS].handler =
pcf50633_mbc_irq_handler;
pcf->irq_handler[PCF50633_IRQ_USBREM].handler =
pcf50633_mbc_irq_handler;
pcf->irq_handler[PCF50633_IRQ_BATFULL].handler =
pcf50633_mbc_irq_handler;
pcf->irq_handler[PCF50633_IRQ_CHGHALT].handler =
pcf50633_mbc_irq_handler;
pcf->irq_handler[PCF50633_IRQ_THLIMON].handler =
pcf50633_mbc_irq_handler;
pcf->irq_handler[PCF50633_IRQ_THLIMOFF].handler =
pcf50633_mbc_irq_handler;
pcf->irq_handler[PCF50633_IRQ_USBLIMON].handler =
pcf50633_mbc_irq_handler;
pcf->irq_handler[PCF50633_IRQ_USBLIMOFF].handler =
pcf50633_mbc_irq_handler;
pcf->irq_handler[PCF50633_IRQ_LOWSYS].handler =
pcf50633_mbc_irq_handler;
pcf->irq_handler[PCF50633_IRQ_LOWBAT].handler =
pcf50633_mbc_irq_handler;
/* 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 = pcf->pdata->batteries;
mbc->adapter.num_supplicants = 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 = pcf->pdata->batteries;
mbc->usb.num_supplicants = 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 = pcf->pdata->batteries;
mbc->ac.num_supplicants = pcf->pdata->num_batteries;
ret = power_supply_register(&pdev->dev, &mbc->adapter);
if (ret)
dev_err(pcf->dev, "failed to register adapter\n");
ret = power_supply_register(&pdev->dev, &mbc->usb);
if (ret)
dev_err(pcf->dev, "failed to register usb\n");
ret = power_supply_register(&pdev->dev, &mbc->ac);
if (ret)
dev_err(pcf->dev, "failed to register ac\n");
return sysfs_create_group(&pdev->dev.kobj, &mbc_attr_group);
}
static int __devexit pcf50633_mbc_remove(struct platform_device *pdev)
{
struct pcf50633 *pcf;
pcf = platform_get_drvdata(pdev);
return 0;
}
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");
|
