/* NXP PCF50606 Main Battery Charger Driver * * (C) 2006-2008 by Openmoko, Inc. * Author: Balaji Rao * 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 #include #include #include #include #include #include #include #include #include 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 "); MODULE_DESCRIPTION("PCF50606 mbc driver"); MODULE_LICENSE("GPL"); MODULE_ALIAS("platform:pcf50606-mbc");