diff options
Diffstat (limited to 'drivers/power')
| -rw-r--r-- | drivers/power/Kconfig | 6 | ||||
| -rw-r--r-- | drivers/power/Makefile | 1 | ||||
| -rw-r--r-- | drivers/power/pcf50633-charger.c | 358 |
3 files changed, 365 insertions, 0 deletions
diff --git a/drivers/power/Kconfig b/drivers/power/Kconfig index 668472405a57..33da1127992a 100644 --- a/drivers/power/Kconfig +++ b/drivers/power/Kconfig @@ -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 diff --git a/drivers/power/Makefile b/drivers/power/Makefile index eebb15505a40..2fcf41d13e5c 100644 --- a/drivers/power/Makefile +++ b/drivers/power/Makefile @@ -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 diff --git a/drivers/power/pcf50633-charger.c b/drivers/power/pcf50633-charger.c new file mode 100644 index 000000000000..e988ec130fcd --- /dev/null +++ b/drivers/power/pcf50633-charger.c @@ -0,0 +1,358 @@ +/* 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"); |
