diff options
Diffstat (limited to 'drivers/power/pcf50606-charger.c')
| -rw-r--r-- | drivers/power/pcf50606-charger.c | 244 |
1 files changed, 244 insertions, 0 deletions
diff --git a/drivers/power/pcf50606-charger.c b/drivers/power/pcf50606-charger.c new file mode 100644 index 00000000000..a566fe3ed56 --- /dev/null +++ b/drivers/power/pcf50606-charger.c @@ -0,0 +1,244 @@ +/* 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; +}; + +void 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; + + 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; + } +} +EXPORT_SYMBOL_GPL(pcf50606_charge_fast); + +static ssize_t +show_chgmode(struct device *dev, struct device_attribute *attr, char *buf) +{ + struct pcf50606_mbc *mbc = dev_get_drvdata(dev); + + u8 mbcc1 = pcf50606_reg_read(mbc->pcf, PCF50606_REG_MBCC1); + u8 chgmod = (mbcc1 & PCF50606_MBCC1_CHGMOD_MASK); + + return sprintf(buf, "%d\n", chgmod); +} + +static ssize_t set_chgmode(struct device *dev, struct device_attribute *attr, + const char *buf, size_t count) +{ + struct pcf50606_mbc *mbc = dev_get_drvdata(dev); + u_int8_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(chgmode, S_IRUGO, show_chgmode, set_chgmode); + + +static struct attribute *pcf50606_mbc_sysfs_entries[] = { + &dev_attr_chgmode.attr, + NULL, +}; + +static struct attribute_group mbc_attr_group = { + .name = NULL, /* put in device directory */ + .attrs = pcf50606_mbc_sysfs_entries, +}; + +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 u8 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; + struct pcf50606_subdev_pdata *pdata = pdev->dev.platform_data; + int ret; + int i; + u8 oocs; + + 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++) + pcf50606_register_irq(mbc->pcf, mbc_irq_handlers[i], + pcf50606_mbc_irq_handler, mbc); + + 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; + } + + ret = sysfs_create_group(&pdev->dev.kobj, &mbc_attr_group); + 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); + + return 0; +} + +static int __devexit pcf50606_mbc_remove(struct platform_device *pdev) +{ + struct pcf50606_mbc *mbc = platform_get_drvdata(pdev); + int 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); + + kfree(mbc); + + return 0; +} + +static struct platform_driver pcf50606_mbc_driver = { + .driver = { + .name = "pcf50606-mbc", + }, + .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"); |