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    Subject[PATCH V2 5/7] power_supply: PCF50633 battery charger driver
    Date
    Signed-off-by: Balaji Rao <balajirrao@openmoko.org>
    Cc: Andy Green <andy@openmoko.com>
    Cc: Anton Vorontsov <cbou@mail.ru>
    Cc: David Woodhouse <dwmw2@infradead.org>
    ---
    drivers/power/Kconfig | 6 +
    drivers/power/Makefile | 2
    drivers/power/pcf50633-charger.c | 358 ++++++++++++++++++++++++++++++++++++++
    include/linux/mfd/pcf50633/mbc.h | 134 ++++++++++++++
    4 files changed, 500 insertions(+), 0 deletions(-)
    create mode 100644 drivers/power/pcf50633-charger.c
    create mode 100644 include/linux/mfd/pcf50633/mbc.h

    diff --git a/drivers/power/Kconfig b/drivers/power/Kconfig
    index 52f8676..04f6316 100644
    --- a/drivers/power/Kconfig
    +++ b/drivers/power/Kconfig
    @@ -75,4 +75,10 @@ config BATTERY_BQ27x00
    help
    Say Y here to enable support for batteries with BQ27200(I2C) chip.

    +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 e6f6865..62bcb76 100644
    --- a/drivers/power/Makefile
    +++ b/drivers/power/Makefile
    @@ -24,3 +24,5 @@ obj-$(CONFIG_BATTERY_OLPC) += olpc_battery.o
    obj-$(CONFIG_BATTERY_TOSA) += tosa_battery.o
    obj-$(CONFIG_BATTERY_WM97XX) += wm97xx_battery.o
    obj-$(CONFIG_BATTERY_BQ27x00) += bq27x00_battery.o
    +
    +obj-$(CONFIG_CHARGER_PCF50633) += pcf50633-charger.o
    diff --git a/drivers/power/pcf50633-charger.c b/drivers/power/pcf50633-charger.c
    new file mode 100644
    index 0000000..83fc70c
    --- /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_online)
    + status |= PCF50633_MBC_USB_ACTIVE;
    + if (mbc->usb_online)
    + status |= PCF50633_MBC_ADAPTER_ONLINE;
    + if (mbc->usb_online)
    + 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");
    diff --git a/include/linux/mfd/pcf50633/mbc.h b/include/linux/mfd/pcf50633/mbc.h
    new file mode 100644
    index 0000000..6e17619
    --- /dev/null
    +++ b/include/linux/mfd/pcf50633/mbc.h
    @@ -0,0 +1,134 @@
    +/*
    + * mbc.h -- Driver for NXP PCF50633 Main Battery Charger
    + *
    + * (C) 2006-2008 by Openmoko, Inc.
    + * All rights reserved.
    + *
    + * 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.
    + */
    +
    +#ifndef __LINUX_MFD_PCF50633_MBC_H
    +#define __LINUX_MFD_PCF50633_MBC_H
    +
    +#include <linux/mfd/pcf50633/core.h>
    +#include <linux/platform_device.h>
    +
    +#define PCF50633_REG_MBCC1 0x43
    +#define PCF50633_REG_MBCC2 0x44
    +#define PCF50633_REG_MBCC3 0x45
    +#define PCF50633_REG_MBCC4 0x46
    +#define PCF50633_REG_MBCC5 0x47
    +#define PCF50633_REG_MBCC6 0x48
    +#define PCF50633_REG_MBCC7 0x49
    +#define PCF50633_REG_MBCC8 0x4a
    +#define PCF50633_REG_MBCS1 0x4b
    +#define PCF50633_REG_MBCS2 0x4c
    +#define PCF50633_REG_MBCS3 0x4d
    +
    +enum pcf50633_reg_mbcc1 {
    + PCF50633_MBCC1_CHGENA = 0x01, /* Charger enable */
    + PCF50633_MBCC1_AUTOSTOP = 0x02,
    + PCF50633_MBCC1_AUTORES = 0x04, /* automatic resume */
    + PCF50633_MBCC1_RESUME = 0x08, /* explicit resume cmd */
    + PCF50633_MBCC1_RESTART = 0x10, /* restart charging */
    + PCF50633_MBCC1_PREWDTIME_60M = 0x20, /* max. precharging time */
    + PCF50633_MBCC1_WDTIME_1H = 0x00,
    + PCF50633_MBCC1_WDTIME_2H = 0x40,
    + PCF50633_MBCC1_WDTIME_4H = 0x80,
    + PCF50633_MBCC1_WDTIME_6H = 0xc0,
    +};
    +#define PCF50633_MBCC1_WDTIME_MASK 0xc0
    +
    +enum pcf50633_reg_mbcc2 {
    + PCF50633_MBCC2_VBATCOND_2V7 = 0x00,
    + PCF50633_MBCC2_VBATCOND_2V85 = 0x01,
    + PCF50633_MBCC2_VBATCOND_3V0 = 0x02,
    + PCF50633_MBCC2_VBATCOND_3V15 = 0x03,
    + PCF50633_MBCC2_VMAX_4V = 0x00,
    + PCF50633_MBCC2_VMAX_4V20 = 0x28,
    + PCF50633_MBCC2_VRESDEBTIME_64S = 0x80, /* debounce time (32/64sec) */
    +};
    +
    +enum pcf50633_reg_mbcc7 {
    + PCF50633_MBCC7_USB_100mA = 0x00,
    + PCF50633_MBCC7_USB_500mA = 0x01,
    + PCF50633_MBCC7_USB_1000mA = 0x02,
    + PCF50633_MBCC7_USB_SUSPEND = 0x03,
    + PCF50633_MBCC7_BATTEMP_EN = 0x04,
    + PCF50633_MBCC7_BATSYSIMAX_1A6 = 0x00,
    + PCF50633_MBCC7_BATSYSIMAX_1A8 = 0x40,
    + PCF50633_MBCC7_BATSYSIMAX_2A0 = 0x80,
    + PCF50633_MBCC7_BATSYSIMAX_2A2 = 0xc0,
    +};
    +#define PCF50633_MBCC7_USB_MASK 0x03
    +
    +enum pcf50633_reg_mbcc8 {
    + PCF50633_MBCC8_USBENASUS = 0x10,
    +};
    +
    +enum pcf50633_reg_mbcs1 {
    + PCF50633_MBCS1_USBPRES = 0x01,
    + PCF50633_MBCS1_USBOK = 0x02,
    + PCF50633_MBCS1_ADAPTPRES = 0x04,
    + PCF50633_MBCS1_ADAPTOK = 0x08,
    + PCF50633_MBCS1_TBAT_OK = 0x00,
    + PCF50633_MBCS1_TBAT_ABOVE = 0x10,
    + PCF50633_MBCS1_TBAT_BELOW = 0x20,
    + PCF50633_MBCS1_TBAT_UNDEF = 0x30,
    + PCF50633_MBCS1_PREWDTEXP = 0x40,
    + PCF50633_MBCS1_WDTEXP = 0x80,
    +};
    +
    +enum pcf50633_reg_mbcs2_mbcmod {
    + PCF50633_MBCS2_MBC_PLAY = 0x00,
    + PCF50633_MBCS2_MBC_USB_PRE = 0x01,
    + PCF50633_MBCS2_MBC_USB_PRE_WAIT = 0x02,
    + PCF50633_MBCS2_MBC_USB_FAST = 0x03,
    + PCF50633_MBCS2_MBC_USB_FAST_WAIT = 0x04,
    + PCF50633_MBCS2_MBC_USB_SUSPEND = 0x05,
    + PCF50633_MBCS2_MBC_ADP_PRE = 0x06,
    + PCF50633_MBCS2_MBC_ADP_PRE_WAIT = 0x07,
    + PCF50633_MBCS2_MBC_ADP_FAST = 0x08,
    + PCF50633_MBCS2_MBC_ADP_FAST_WAIT = 0x09,
    + PCF50633_MBCS2_MBC_BAT_FULL = 0x0a,
    + PCF50633_MBCS2_MBC_HALT = 0x0b,
    +};
    +#define PCF50633_MBCS2_MBC_MASK 0x0f
    +enum pcf50633_reg_mbcs2_chgstat {
    + PCF50633_MBCS2_CHGS_NONE = 0x00,
    + PCF50633_MBCS2_CHGS_ADAPTER = 0x10,
    + PCF50633_MBCS2_CHGS_USB = 0x20,
    + PCF50633_MBCS2_CHGS_BOTH = 0x30,
    +};
    +#define PCF50633_MBCS2_RESSTAT_AUTO 0x40
    +
    +enum pcf50633_reg_mbcs3 {
    + PCF50633_MBCS3_USBLIM_PLAY = 0x01,
    + PCF50633_MBCS3_USBLIM_CGH = 0x02,
    + PCF50633_MBCS3_TLIM_PLAY = 0x04,
    + PCF50633_MBCS3_TLIM_CHG = 0x08,
    + PCF50633_MBCS3_ILIM = 0x10, /* 1: Ibat > Icutoff */
    + PCF50633_MBCS3_VLIM = 0x20, /* 1: Vbat == Vmax */
    + PCF50633_MBCS3_VBATSTAT = 0x40, /* 1: Vbat > Vbatcond */
    + PCF50633_MBCS3_VRES = 0x80, /* 1: Vbat > Vth(RES) */
    +};
    +
    +#define PCF50633_MBCC2_VBATCOND_MASK 0x03
    +#define PCF50633_MBCC2_VMAX_MASK 0x3c
    +
    +/* Charger status */
    +#define PCF50633_MBC_USB_ONLINE 0x01
    +#define PCF50633_MBC_USB_ACTIVE 0x02
    +#define PCF50633_MBC_ADAPTER_ONLINE 0x04
    +#define PCF50633_MBC_ADAPTER_ACTIVE 0x08
    +
    +int pcf50633_mbc_usb_curlim_set(struct pcf50633 *pcf, int ma);
    +
    +int pcf50633_mbc_get_status(struct pcf50633 *);
    +void pcf50633_mbc_set_status(struct pcf50633 *, int what, int status);
    +
    +#endif
    +


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