diff options
Diffstat (limited to 'drivers/power/max8903_charger.c')
| -rw-r--r-- | drivers/power/max8903_charger.c | 380 |
1 files changed, 0 insertions, 380 deletions
diff --git a/drivers/power/max8903_charger.c b/drivers/power/max8903_charger.c deleted file mode 100644 index 08f0d7909b6b..000000000000 --- a/drivers/power/max8903_charger.c +++ /dev/null @@ -1,380 +0,0 @@ -/* - * max8903_charger.c - Maxim 8903 USB/Adapter Charger Driver - * - * Copyright (C) 2011 Samsung Electronics - * MyungJoo Ham <myungjoo.ham@samsung.com> - * - * 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/gpio.h> -#include <linux/interrupt.h> -#include <linux/module.h> -#include <linux/slab.h> -#include <linux/power_supply.h> -#include <linux/platform_device.h> -#include <linux/power/max8903_charger.h> - -struct max8903_data { - struct max8903_pdata pdata; - struct device *dev; - struct power_supply psy; - bool fault; - bool usb_in; - bool ta_in; -}; - -static enum power_supply_property max8903_charger_props[] = { - POWER_SUPPLY_PROP_STATUS, /* Charger status output */ - POWER_SUPPLY_PROP_ONLINE, /* External power source */ - POWER_SUPPLY_PROP_HEALTH, /* Fault or OK */ -}; - -static int max8903_get_property(struct power_supply *psy, - enum power_supply_property psp, - union power_supply_propval *val) -{ - struct max8903_data *data = container_of(psy, - struct max8903_data, psy); - - switch (psp) { - case POWER_SUPPLY_PROP_STATUS: - val->intval = POWER_SUPPLY_STATUS_UNKNOWN; - if (data->pdata.chg) { - if (gpio_get_value(data->pdata.chg) == 0) - val->intval = POWER_SUPPLY_STATUS_CHARGING; - else if (data->usb_in || data->ta_in) - val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING; - else - val->intval = POWER_SUPPLY_STATUS_DISCHARGING; - } - break; - case POWER_SUPPLY_PROP_ONLINE: - val->intval = 0; - if (data->usb_in || data->ta_in) - val->intval = 1; - break; - case POWER_SUPPLY_PROP_HEALTH: - val->intval = POWER_SUPPLY_HEALTH_GOOD; - if (data->fault) - val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE; - break; - default: - return -EINVAL; - } - return 0; -} - -static irqreturn_t max8903_dcin(int irq, void *_data) -{ - struct max8903_data *data = _data; - struct max8903_pdata *pdata = &data->pdata; - bool ta_in; - enum power_supply_type old_type; - - ta_in = gpio_get_value(pdata->dok) ? false : true; - - if (ta_in == data->ta_in) - return IRQ_HANDLED; - - data->ta_in = ta_in; - - /* Set Current-Limit-Mode 1:DC 0:USB */ - if (pdata->dcm) - gpio_set_value(pdata->dcm, ta_in ? 1 : 0); - - /* Charger Enable / Disable (cen is negated) */ - if (pdata->cen) - gpio_set_value(pdata->cen, ta_in ? 0 : - (data->usb_in ? 0 : 1)); - - dev_dbg(data->dev, "TA(DC-IN) Charger %s.\n", ta_in ? - "Connected" : "Disconnected"); - - old_type = data->psy.type; - - if (data->ta_in) - data->psy.type = POWER_SUPPLY_TYPE_MAINS; - else if (data->usb_in) - data->psy.type = POWER_SUPPLY_TYPE_USB; - else - data->psy.type = POWER_SUPPLY_TYPE_BATTERY; - - if (old_type != data->psy.type) - power_supply_changed(&data->psy); - - return IRQ_HANDLED; -} - -static irqreturn_t max8903_usbin(int irq, void *_data) -{ - struct max8903_data *data = _data; - struct max8903_pdata *pdata = &data->pdata; - bool usb_in; - enum power_supply_type old_type; - - usb_in = gpio_get_value(pdata->uok) ? false : true; - - if (usb_in == data->usb_in) - return IRQ_HANDLED; - - data->usb_in = usb_in; - - /* Do not touch Current-Limit-Mode */ - - /* Charger Enable / Disable (cen is negated) */ - if (pdata->cen) - gpio_set_value(pdata->cen, usb_in ? 0 : - (data->ta_in ? 0 : 1)); - - dev_dbg(data->dev, "USB Charger %s.\n", usb_in ? - "Connected" : "Disconnected"); - - old_type = data->psy.type; - - if (data->ta_in) - data->psy.type = POWER_SUPPLY_TYPE_MAINS; - else if (data->usb_in) - data->psy.type = POWER_SUPPLY_TYPE_USB; - else - data->psy.type = POWER_SUPPLY_TYPE_BATTERY; - - if (old_type != data->psy.type) - power_supply_changed(&data->psy); - - return IRQ_HANDLED; -} - -static irqreturn_t max8903_fault(int irq, void *_data) -{ - struct max8903_data *data = _data; - struct max8903_pdata *pdata = &data->pdata; - bool fault; - - fault = gpio_get_value(pdata->flt) ? false : true; - - if (fault == data->fault) - return IRQ_HANDLED; - - data->fault = fault; - - if (fault) - dev_err(data->dev, "Charger suffers a fault and stops.\n"); - else - dev_err(data->dev, "Charger recovered from a fault.\n"); - - return IRQ_HANDLED; -} - -static int max8903_probe(struct platform_device *pdev) -{ - struct max8903_data *data; - struct device *dev = &pdev->dev; - struct max8903_pdata *pdata = pdev->dev.platform_data; - int ret = 0; - int gpio; - int ta_in = 0; - int usb_in = 0; - - data = devm_kzalloc(dev, sizeof(struct max8903_data), GFP_KERNEL); - if (data == NULL) { - dev_err(dev, "Cannot allocate memory.\n"); - return -ENOMEM; - } - memcpy(&data->pdata, pdata, sizeof(struct max8903_pdata)); - data->dev = dev; - platform_set_drvdata(pdev, data); - - if (pdata->dc_valid == false && pdata->usb_valid == false) { - dev_err(dev, "No valid power sources.\n"); - ret = -EINVAL; - goto err; - } - - if (pdata->dc_valid) { - if (pdata->dok && gpio_is_valid(pdata->dok) && - pdata->dcm && gpio_is_valid(pdata->dcm)) { - gpio = pdata->dok; /* PULL_UPed Interrupt */ - ta_in = gpio_get_value(gpio) ? 0 : 1; - - gpio = pdata->dcm; /* Output */ - gpio_set_value(gpio, ta_in); - } else { - dev_err(dev, "When DC is wired, DOK and DCM should" - " be wired as well.\n"); - ret = -EINVAL; - goto err; - } - } else { - if (pdata->dcm) { - if (gpio_is_valid(pdata->dcm)) - gpio_set_value(pdata->dcm, 0); - else { - dev_err(dev, "Invalid pin: dcm.\n"); - ret = -EINVAL; - goto err; - } - } - } - - if (pdata->usb_valid) { - if (pdata->uok && gpio_is_valid(pdata->uok)) { - gpio = pdata->uok; - usb_in = gpio_get_value(gpio) ? 0 : 1; - } else { - dev_err(dev, "When USB is wired, UOK should be wired." - "as well.\n"); - ret = -EINVAL; - goto err; - } - } - - if (pdata->cen) { - if (gpio_is_valid(pdata->cen)) { - gpio_set_value(pdata->cen, (ta_in || usb_in) ? 0 : 1); - } else { - dev_err(dev, "Invalid pin: cen.\n"); - ret = -EINVAL; - goto err; - } - } - - if (pdata->chg) { - if (!gpio_is_valid(pdata->chg)) { - dev_err(dev, "Invalid pin: chg.\n"); - ret = -EINVAL; - goto err; - } - } - - if (pdata->flt) { - if (!gpio_is_valid(pdata->flt)) { - dev_err(dev, "Invalid pin: flt.\n"); - ret = -EINVAL; - goto err; - } - } - - if (pdata->usus) { - if (!gpio_is_valid(pdata->usus)) { - dev_err(dev, "Invalid pin: usus.\n"); - ret = -EINVAL; - goto err; - } - } - - data->fault = false; - data->ta_in = ta_in; - data->usb_in = usb_in; - - data->psy.name = "max8903_charger"; - data->psy.type = (ta_in) ? POWER_SUPPLY_TYPE_MAINS : - ((usb_in) ? POWER_SUPPLY_TYPE_USB : - POWER_SUPPLY_TYPE_BATTERY); - data->psy.get_property = max8903_get_property; - data->psy.properties = max8903_charger_props; - data->psy.num_properties = ARRAY_SIZE(max8903_charger_props); - - ret = power_supply_register(dev, &data->psy); - if (ret) { - dev_err(dev, "failed: power supply register.\n"); - goto err; - } - - if (pdata->dc_valid) { - ret = request_threaded_irq(gpio_to_irq(pdata->dok), - NULL, max8903_dcin, - IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING, - "MAX8903 DC IN", data); - if (ret) { - dev_err(dev, "Cannot request irq %d for DC (%d)\n", - gpio_to_irq(pdata->dok), ret); - goto err_psy; - } - } - - if (pdata->usb_valid) { - ret = request_threaded_irq(gpio_to_irq(pdata->uok), - NULL, max8903_usbin, - IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING, - "MAX8903 USB IN", data); - if (ret) { - dev_err(dev, "Cannot request irq %d for USB (%d)\n", - gpio_to_irq(pdata->uok), ret); - goto err_dc_irq; - } - } - - if (pdata->flt) { - ret = request_threaded_irq(gpio_to_irq(pdata->flt), - NULL, max8903_fault, - IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING, - "MAX8903 Fault", data); - if (ret) { - dev_err(dev, "Cannot request irq %d for Fault (%d)\n", - gpio_to_irq(pdata->flt), ret); - goto err_usb_irq; - } - } - - return 0; - -err_usb_irq: - if (pdata->usb_valid) - free_irq(gpio_to_irq(pdata->uok), data); -err_dc_irq: - if (pdata->dc_valid) - free_irq(gpio_to_irq(pdata->dok), data); -err_psy: - power_supply_unregister(&data->psy); -err: - return ret; -} - -static int max8903_remove(struct platform_device *pdev) -{ - struct max8903_data *data = platform_get_drvdata(pdev); - - if (data) { - struct max8903_pdata *pdata = &data->pdata; - - if (pdata->flt) - free_irq(gpio_to_irq(pdata->flt), data); - if (pdata->usb_valid) - free_irq(gpio_to_irq(pdata->uok), data); - if (pdata->dc_valid) - free_irq(gpio_to_irq(pdata->dok), data); - power_supply_unregister(&data->psy); - } - - return 0; -} - -static struct platform_driver max8903_driver = { - .probe = max8903_probe, - .remove = max8903_remove, - .driver = { - .name = "max8903-charger", - .owner = THIS_MODULE, - }, -}; - -module_platform_driver(max8903_driver); - -MODULE_LICENSE("GPL"); -MODULE_DESCRIPTION("MAX8903 Charger Driver"); -MODULE_AUTHOR("MyungJoo Ham <myungjoo.ham@samsung.com>"); -MODULE_ALIAS("platform:max8903-charger"); |