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marcus.erl |
/*
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* battery.c - ACPI Battery Driver (Revision: 2.0)
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*
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* Copyright (C) 2007 Alexey Starikovskiy <astarikovskiy@suse.de>
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* Copyright (C) 2004-2007 Vladimir Lebedev <vladimir.p.lebedev@intel.com>
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* Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com>
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* Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
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*
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* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or (at
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* your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
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*
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* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/types.h>
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#include <linux/jiffies.h>
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#ifdef CONFIG_ACPI_PROCFS_POWER
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#include <linux/proc_fs.h>
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#include <linux/seq_file.h>
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#include <asm/uaccess.h>
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#endif
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#include <acpi/acpi_bus.h>
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#include <acpi/acpi_drivers.h>
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#ifdef CONFIG_ACPI_SYSFS_POWER
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#include <linux/power_supply.h>
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#endif
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#define ACPI_BATTERY_VALUE_UNKNOWN 0xFFFFFFFF
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#define ACPI_BATTERY_COMPONENT 0x00040000
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#define ACPI_BATTERY_CLASS "battery"
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#define ACPI_BATTERY_DEVICE_NAME "Battery"
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#define ACPI_BATTERY_NOTIFY_STATUS 0x80
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#define ACPI_BATTERY_NOTIFY_INFO 0x81
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#define _COMPONENT ACPI_BATTERY_COMPONENT
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ACPI_MODULE_NAME("battery");
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MODULE_AUTHOR("Paul Diefenbaugh");
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MODULE_AUTHOR("Alexey Starikovskiy <astarikovskiy@suse.de>");
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MODULE_DESCRIPTION("ACPI Battery Driver");
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MODULE_LICENSE("GPL");
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static unsigned int cache_time = 1000;
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module_param(cache_time, uint, 0644);
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MODULE_PARM_DESC(cache_time, "cache time in milliseconds");
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#ifdef CONFIG_ACPI_PROCFS_POWER
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extern struct proc_dir_entry *acpi_lock_battery_dir(void);
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extern void *acpi_unlock_battery_dir(struct proc_dir_entry *acpi_battery_dir);
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enum acpi_battery_files {
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info_tag = 0,
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state_tag,
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alarm_tag,
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ACPI_BATTERY_NUMFILES,
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};
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#endif
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static const struct acpi_device_id battery_device_ids[] = {
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{"PNP0C0A", 0},
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{"", 0},
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};
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MODULE_DEVICE_TABLE(acpi, battery_device_ids);
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struct acpi_battery {
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struct mutex lock;
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#ifdef CONFIG_ACPI_SYSFS_POWER
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struct power_supply bat;
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#endif
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struct acpi_device *device;
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unsigned long update_time;
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int current_now;
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int capacity_now;
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int voltage_now;
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int design_capacity;
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int full_charge_capacity;
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int technology;
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int design_voltage;
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int design_capacity_warning;
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int design_capacity_low;
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int capacity_granularity_1;
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int capacity_granularity_2;
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int alarm;
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char model_number[32];
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char serial_number[32];
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char type[32];
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char oem_info[32];
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int state;
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int power_unit;
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u8 alarm_present;
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};
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#define to_acpi_battery(x) container_of(x, struct acpi_battery, bat);
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inline int acpi_battery_present(struct acpi_battery *battery)
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{
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return battery->device->status.battery_present;
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}
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#ifdef CONFIG_ACPI_SYSFS_POWER
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static int acpi_battery_technology(struct acpi_battery *battery)
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{
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if (!strcasecmp("NiCd", battery->type))
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return POWER_SUPPLY_TECHNOLOGY_NiCd;
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if (!strcasecmp("NiMH", battery->type))
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return POWER_SUPPLY_TECHNOLOGY_NiMH;
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if (!strcasecmp("LION", battery->type))
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return POWER_SUPPLY_TECHNOLOGY_LION;
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if (!strncasecmp("LI-ION", battery->type, 6))
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return POWER_SUPPLY_TECHNOLOGY_LION;
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if (!strcasecmp("LiP", battery->type))
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return POWER_SUPPLY_TECHNOLOGY_LIPO;
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return POWER_SUPPLY_TECHNOLOGY_UNKNOWN;
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}
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static int acpi_battery_get_state(struct acpi_battery *battery);
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static int acpi_battery_get_property(struct power_supply *psy,
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enum power_supply_property psp,
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union power_supply_propval *val)
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{
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struct acpi_battery *battery = to_acpi_battery(psy);
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if (acpi_battery_present(battery)) {
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/* run battery update only if it is present */
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acpi_battery_get_state(battery);
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} else if (psp != POWER_SUPPLY_PROP_PRESENT)
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return -ENODEV;
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switch (psp) {
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case POWER_SUPPLY_PROP_STATUS:
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if (battery->state & 0x01)
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val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
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else if (battery->state & 0x02)
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val->intval = POWER_SUPPLY_STATUS_CHARGING;
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else if (battery->state == 0)
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val->intval = POWER_SUPPLY_STATUS_FULL;
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else
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val->intval = POWER_SUPPLY_STATUS_UNKNOWN;
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break;
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case POWER_SUPPLY_PROP_PRESENT:
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val->intval = acpi_battery_present(battery);
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break;
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case POWER_SUPPLY_PROP_TECHNOLOGY:
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val->intval = acpi_battery_technology(battery);
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break;
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case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:
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val->intval = battery->design_voltage * 1000;
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break;
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case POWER_SUPPLY_PROP_VOLTAGE_NOW:
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val->intval = battery->voltage_now * 1000;
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break;
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case POWER_SUPPLY_PROP_CURRENT_NOW:
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val->intval = battery->current_now * 1000;
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break;
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case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
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case POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN:
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val->intval = battery->design_capacity * 1000;
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break;
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case POWER_SUPPLY_PROP_CHARGE_FULL:
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case POWER_SUPPLY_PROP_ENERGY_FULL:
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val->intval = battery->full_charge_capacity * 1000;
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break;
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case POWER_SUPPLY_PROP_CHARGE_NOW:
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case POWER_SUPPLY_PROP_ENERGY_NOW:
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val->intval = battery->capacity_now * 1000;
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break;
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case POWER_SUPPLY_PROP_MODEL_NAME:
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val->strval = battery->model_number;
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break;
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case POWER_SUPPLY_PROP_MANUFACTURER:
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val->strval = battery->oem_info;
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break;
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default:
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return -EINVAL;
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}
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return 0;
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}
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static enum power_supply_property charge_battery_props[] = {
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POWER_SUPPLY_PROP_STATUS,
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POWER_SUPPLY_PROP_PRESENT,
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POWER_SUPPLY_PROP_TECHNOLOGY,
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POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
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POWER_SUPPLY_PROP_VOLTAGE_NOW,
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POWER_SUPPLY_PROP_CURRENT_NOW,
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POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
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POWER_SUPPLY_PROP_CHARGE_FULL,
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POWER_SUPPLY_PROP_CHARGE_NOW,
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POWER_SUPPLY_PROP_MODEL_NAME,
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POWER_SUPPLY_PROP_MANUFACTURER,
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};
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static enum power_supply_property energy_battery_props[] = {
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POWER_SUPPLY_PROP_STATUS,
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POWER_SUPPLY_PROP_PRESENT,
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POWER_SUPPLY_PROP_TECHNOLOGY,
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POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
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POWER_SUPPLY_PROP_VOLTAGE_NOW,
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POWER_SUPPLY_PROP_CURRENT_NOW,
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POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN,
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POWER_SUPPLY_PROP_ENERGY_FULL,
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POWER_SUPPLY_PROP_ENERGY_NOW,
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POWER_SUPPLY_PROP_MODEL_NAME,
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POWER_SUPPLY_PROP_MANUFACTURER,
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};
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#endif
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#ifdef CONFIG_ACPI_PROCFS_POWER
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inline char *acpi_battery_units(struct acpi_battery *battery)
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{
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return (battery->power_unit)?"mA":"mW";
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}
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#endif
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| 239 |
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/* --------------------------------------------------------------------------
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Battery Management
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-------------------------------------------------------------------------- */
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| 242 |
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struct acpi_offsets {
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size_t offset; /* offset inside struct acpi_sbs_battery */
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u8 mode; /* int or string? */
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};
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| 246 |
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| 247 |
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static struct acpi_offsets state_offsets[] = {
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| 248 |
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{offsetof(struct acpi_battery, state), 0},
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| 249 |
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{offsetof(struct acpi_battery, current_now), 0},
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| 250 |
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{offsetof(struct acpi_battery, capacity_now), 0},
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{offsetof(struct acpi_battery, voltage_now), 0},
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};
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| 253 |
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| 254 |
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static struct acpi_offsets info_offsets[] = {
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{offsetof(struct acpi_battery, power_unit), 0},
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| 256 |
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{offsetof(struct acpi_battery, design_capacity), 0},
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| 257 |
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{offsetof(struct acpi_battery, full_charge_capacity), 0},
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| 258 |
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{offsetof(struct acpi_battery, technology), 0},
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| 259 |
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{offsetof(struct acpi_battery, design_voltage), 0},
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| 260 |
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{offsetof(struct acpi_battery, design_capacity_warning), 0},
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| 261 |
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{offsetof(struct acpi_battery, design_capacity_low), 0},
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| 262 |
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{offsetof(struct acpi_battery, capacity_granularity_1), 0},
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{offsetof(struct acpi_battery, capacity_granularity_2), 0},
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| 264 |
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{offsetof(struct acpi_battery, model_number), 1},
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| 265 |
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{offsetof(struct acpi_battery, serial_number), 1},
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| 266 |
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{offsetof(struct acpi_battery, type), 1},
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| 267 |
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{offsetof(struct acpi_battery, oem_info), 1},
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| 268 |
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};
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| 269 |
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| 270 |
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static int extract_package(struct acpi_battery *battery,
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| 271 |
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union acpi_object *package,
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| 272 |
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struct acpi_offsets *offsets, int num)
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| 273 |
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{
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| 274 |
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int i;
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| 275 |
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union acpi_object *element;
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| 276 |
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if (package->type != ACPI_TYPE_PACKAGE)
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| 277 |
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return -EFAULT;
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| 278 |
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for (i = 0; i < num; ++i) {
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| 279 |
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if (package->package.count <= i)
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| 280 |
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return -EFAULT;
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| 281 |
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element = &package->package.elements[i];
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| 282 |
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if (offsets[i].mode) {
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| 283 |
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u8 *ptr = (u8 *)battery + offsets[i].offset;
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| 284 |
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if (element->type == ACPI_TYPE_STRING ||
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| 285 |
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element->type == ACPI_TYPE_BUFFER)
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| 286 |
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strncpy(ptr, element->string.pointer, 32);
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| 287 |
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else if (element->type == ACPI_TYPE_INTEGER) {
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| 288 |
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strncpy(ptr, (u8 *)&element->integer.value,
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| 289 |
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sizeof(acpi_integer));
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| 290 |
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ptr[sizeof(acpi_integer)] = 0;
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| 291 |
|
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} else return -EFAULT;
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| 292 |
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} else {
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| 293 |
|
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if (element->type == ACPI_TYPE_INTEGER) {
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| 294 |
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int *x = (int *)((u8 *)battery +
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| 295 |
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offsets[i].offset);
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| 296 |
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*x = element->integer.value;
|
| 297 |
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} else return -EFAULT;
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| 298 |
|
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}
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| 299 |
|
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}
|
| 300 |
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return 0;
|
| 301 |
|
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}
|
| 302 |
|
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|
| 303 |
|
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static int acpi_battery_get_status(struct acpi_battery *battery)
|
| 304 |
|
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{
|
| 305 |
|
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if (acpi_bus_get_status(battery->device)) {
|
| 306 |
|
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ACPI_EXCEPTION((AE_INFO, AE_ERROR, "Evaluating _STA"));
|
| 307 |
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return -ENODEV;
|
| 308 |
|
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}
|
| 309 |
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return 0;
|
| 310 |
|
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}
|
| 311 |
|
|
|
| 312 |
|
|
static int acpi_battery_get_info(struct acpi_battery *battery)
|
| 313 |
|
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{
|
| 314 |
|
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int result = -EFAULT;
|
| 315 |
|
|
acpi_status status = 0;
|
| 316 |
|
|
struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
|
| 317 |
|
|
|
| 318 |
|
|
if (!acpi_battery_present(battery))
|
| 319 |
|
|
return 0;
|
| 320 |
|
|
mutex_lock(&battery->lock);
|
| 321 |
|
|
status = acpi_evaluate_object(battery->device->handle, "_BIF",
|
| 322 |
|
|
NULL, &buffer);
|
| 323 |
|
|
mutex_unlock(&battery->lock);
|
| 324 |
|
|
|
| 325 |
|
|
if (ACPI_FAILURE(status)) {
|
| 326 |
|
|
ACPI_EXCEPTION((AE_INFO, status, "Evaluating _BIF"));
|
| 327 |
|
|
return -ENODEV;
|
| 328 |
|
|
}
|
| 329 |
|
|
|
| 330 |
|
|
result = extract_package(battery, buffer.pointer,
|
| 331 |
|
|
info_offsets, ARRAY_SIZE(info_offsets));
|
| 332 |
|
|
kfree(buffer.pointer);
|
| 333 |
|
|
return result;
|
| 334 |
|
|
}
|
| 335 |
|
|
|
| 336 |
|
|
static int acpi_battery_get_state(struct acpi_battery *battery)
|
| 337 |
|
|
{
|
| 338 |
|
|
int result = 0;
|
| 339 |
|
|
acpi_status status = 0;
|
| 340 |
|
|
struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
|
| 341 |
|
|
|
| 342 |
|
|
if (!acpi_battery_present(battery))
|
| 343 |
|
|
return 0;
|
| 344 |
|
|
|
| 345 |
|
|
if (battery->update_time &&
|
| 346 |
|
|
time_before(jiffies, battery->update_time +
|
| 347 |
|
|
msecs_to_jiffies(cache_time)))
|
| 348 |
|
|
return 0;
|
| 349 |
|
|
|
| 350 |
|
|
mutex_lock(&battery->lock);
|
| 351 |
|
|
status = acpi_evaluate_object(battery->device->handle, "_BST",
|
| 352 |
|
|
NULL, &buffer);
|
| 353 |
|
|
mutex_unlock(&battery->lock);
|
| 354 |
|
|
|
| 355 |
|
|
if (ACPI_FAILURE(status)) {
|
| 356 |
|
|
ACPI_EXCEPTION((AE_INFO, status, "Evaluating _BST"));
|
| 357 |
|
|
return -ENODEV;
|
| 358 |
|
|
}
|
| 359 |
|
|
|
| 360 |
|
|
result = extract_package(battery, buffer.pointer,
|
| 361 |
|
|
state_offsets, ARRAY_SIZE(state_offsets));
|
| 362 |
|
|
battery->update_time = jiffies;
|
| 363 |
|
|
kfree(buffer.pointer);
|
| 364 |
|
|
return result;
|
| 365 |
|
|
}
|
| 366 |
|
|
|
| 367 |
|
|
static int acpi_battery_set_alarm(struct acpi_battery *battery)
|
| 368 |
|
|
{
|
| 369 |
|
|
acpi_status status = 0;
|
| 370 |
|
|
union acpi_object arg0 = { .type = ACPI_TYPE_INTEGER };
|
| 371 |
|
|
struct acpi_object_list arg_list = { 1, &arg0 };
|
| 372 |
|
|
|
| 373 |
|
|
if (!acpi_battery_present(battery)|| !battery->alarm_present)
|
| 374 |
|
|
return -ENODEV;
|
| 375 |
|
|
|
| 376 |
|
|
arg0.integer.value = battery->alarm;
|
| 377 |
|
|
|
| 378 |
|
|
mutex_lock(&battery->lock);
|
| 379 |
|
|
status = acpi_evaluate_object(battery->device->handle, "_BTP",
|
| 380 |
|
|
&arg_list, NULL);
|
| 381 |
|
|
mutex_unlock(&battery->lock);
|
| 382 |
|
|
|
| 383 |
|
|
if (ACPI_FAILURE(status))
|
| 384 |
|
|
return -ENODEV;
|
| 385 |
|
|
|
| 386 |
|
|
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Alarm set to %d\n", battery->alarm));
|
| 387 |
|
|
return 0;
|
| 388 |
|
|
}
|
| 389 |
|
|
|
| 390 |
|
|
static int acpi_battery_init_alarm(struct acpi_battery *battery)
|
| 391 |
|
|
{
|
| 392 |
|
|
acpi_status status = AE_OK;
|
| 393 |
|
|
acpi_handle handle = NULL;
|
| 394 |
|
|
|
| 395 |
|
|
/* See if alarms are supported, and if so, set default */
|
| 396 |
|
|
status = acpi_get_handle(battery->device->handle, "_BTP", &handle);
|
| 397 |
|
|
if (ACPI_FAILURE(status)) {
|
| 398 |
|
|
battery->alarm_present = 0;
|
| 399 |
|
|
return 0;
|
| 400 |
|
|
}
|
| 401 |
|
|
battery->alarm_present = 1;
|
| 402 |
|
|
if (!battery->alarm)
|
| 403 |
|
|
battery->alarm = battery->design_capacity_warning;
|
| 404 |
|
|
return acpi_battery_set_alarm(battery);
|
| 405 |
|
|
}
|
| 406 |
|
|
|
| 407 |
|
|
#ifdef CONFIG_ACPI_SYSFS_POWER
|
| 408 |
|
|
static ssize_t acpi_battery_alarm_show(struct device *dev,
|
| 409 |
|
|
struct device_attribute *attr,
|
| 410 |
|
|
char *buf)
|
| 411 |
|
|
{
|
| 412 |
|
|
struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev));
|
| 413 |
|
|
return sprintf(buf, "%d\n", battery->alarm * 1000);
|
| 414 |
|
|
}
|
| 415 |
|
|
|
| 416 |
|
|
static ssize_t acpi_battery_alarm_store(struct device *dev,
|
| 417 |
|
|
struct device_attribute *attr,
|
| 418 |
|
|
const char *buf, size_t count)
|
| 419 |
|
|
{
|
| 420 |
|
|
unsigned long x;
|
| 421 |
|
|
struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev));
|
| 422 |
|
|
if (sscanf(buf, "%ld\n", &x) == 1)
|
| 423 |
|
|
battery->alarm = x/1000;
|
| 424 |
|
|
if (acpi_battery_present(battery))
|
| 425 |
|
|
acpi_battery_set_alarm(battery);
|
| 426 |
|
|
return count;
|
| 427 |
|
|
}
|
| 428 |
|
|
|
| 429 |
|
|
static struct device_attribute alarm_attr = {
|
| 430 |
|
|
.attr = {.name = "alarm", .mode = 0644, .owner = THIS_MODULE},
|
| 431 |
|
|
.show = acpi_battery_alarm_show,
|
| 432 |
|
|
.store = acpi_battery_alarm_store,
|
| 433 |
|
|
};
|
| 434 |
|
|
|
| 435 |
|
|
static int sysfs_add_battery(struct acpi_battery *battery)
|
| 436 |
|
|
{
|
| 437 |
|
|
int result;
|
| 438 |
|
|
|
| 439 |
|
|
if (battery->power_unit) {
|
| 440 |
|
|
battery->bat.properties = charge_battery_props;
|
| 441 |
|
|
battery->bat.num_properties =
|
| 442 |
|
|
ARRAY_SIZE(charge_battery_props);
|
| 443 |
|
|
} else {
|
| 444 |
|
|
battery->bat.properties = energy_battery_props;
|
| 445 |
|
|
battery->bat.num_properties =
|
| 446 |
|
|
ARRAY_SIZE(energy_battery_props);
|
| 447 |
|
|
}
|
| 448 |
|
|
|
| 449 |
|
|
battery->bat.name = acpi_device_bid(battery->device);
|
| 450 |
|
|
battery->bat.type = POWER_SUPPLY_TYPE_BATTERY;
|
| 451 |
|
|
battery->bat.get_property = acpi_battery_get_property;
|
| 452 |
|
|
|
| 453 |
|
|
result = power_supply_register(&battery->device->dev, &battery->bat);
|
| 454 |
|
|
if (result)
|
| 455 |
|
|
return result;
|
| 456 |
|
|
return device_create_file(battery->bat.dev, &alarm_attr);
|
| 457 |
|
|
}
|
| 458 |
|
|
|
| 459 |
|
|
static void sysfs_remove_battery(struct acpi_battery *battery)
|
| 460 |
|
|
{
|
| 461 |
|
|
if (!battery->bat.dev)
|
| 462 |
|
|
return;
|
| 463 |
|
|
device_remove_file(battery->bat.dev, &alarm_attr);
|
| 464 |
|
|
power_supply_unregister(&battery->bat);
|
| 465 |
|
|
battery->bat.dev = NULL;
|
| 466 |
|
|
}
|
| 467 |
|
|
#endif
|
| 468 |
|
|
|
| 469 |
|
|
static int acpi_battery_update(struct acpi_battery *battery)
|
| 470 |
|
|
{
|
| 471 |
|
|
int result;
|
| 472 |
|
|
result = acpi_battery_get_status(battery);
|
| 473 |
|
|
if (result)
|
| 474 |
|
|
return result;
|
| 475 |
|
|
#ifdef CONFIG_ACPI_SYSFS_POWER
|
| 476 |
|
|
if (!acpi_battery_present(battery)) {
|
| 477 |
|
|
sysfs_remove_battery(battery);
|
| 478 |
|
|
battery->update_time = 0;
|
| 479 |
|
|
return 0;
|
| 480 |
|
|
}
|
| 481 |
|
|
#endif
|
| 482 |
|
|
if (!battery->update_time) {
|
| 483 |
|
|
result = acpi_battery_get_info(battery);
|
| 484 |
|
|
if (result)
|
| 485 |
|
|
return result;
|
| 486 |
|
|
acpi_battery_init_alarm(battery);
|
| 487 |
|
|
}
|
| 488 |
|
|
#ifdef CONFIG_ACPI_SYSFS_POWER
|
| 489 |
|
|
if (!battery->bat.dev)
|
| 490 |
|
|
sysfs_add_battery(battery);
|
| 491 |
|
|
#endif
|
| 492 |
|
|
return acpi_battery_get_state(battery);
|
| 493 |
|
|
}
|
| 494 |
|
|
|
| 495 |
|
|
/* --------------------------------------------------------------------------
|
| 496 |
|
|
FS Interface (/proc)
|
| 497 |
|
|
-------------------------------------------------------------------------- */
|
| 498 |
|
|
|
| 499 |
|
|
#ifdef CONFIG_ACPI_PROCFS_POWER
|
| 500 |
|
|
static struct proc_dir_entry *acpi_battery_dir;
|
| 501 |
|
|
|
| 502 |
|
|
static int acpi_battery_print_info(struct seq_file *seq, int result)
|
| 503 |
|
|
{
|
| 504 |
|
|
struct acpi_battery *battery = seq->private;
|
| 505 |
|
|
|
| 506 |
|
|
if (result)
|
| 507 |
|
|
goto end;
|
| 508 |
|
|
|
| 509 |
|
|
seq_printf(seq, "present: %s\n",
|
| 510 |
|
|
acpi_battery_present(battery)?"yes":"no");
|
| 511 |
|
|
if (!acpi_battery_present(battery))
|
| 512 |
|
|
goto end;
|
| 513 |
|
|
if (battery->design_capacity == ACPI_BATTERY_VALUE_UNKNOWN)
|
| 514 |
|
|
seq_printf(seq, "design capacity: unknown\n");
|
| 515 |
|
|
else
|
| 516 |
|
|
seq_printf(seq, "design capacity: %d %sh\n",
|
| 517 |
|
|
battery->design_capacity,
|
| 518 |
|
|
acpi_battery_units(battery));
|
| 519 |
|
|
|
| 520 |
|
|
if (battery->full_charge_capacity == ACPI_BATTERY_VALUE_UNKNOWN)
|
| 521 |
|
|
seq_printf(seq, "last full capacity: unknown\n");
|
| 522 |
|
|
else
|
| 523 |
|
|
seq_printf(seq, "last full capacity: %d %sh\n",
|
| 524 |
|
|
battery->full_charge_capacity,
|
| 525 |
|
|
acpi_battery_units(battery));
|
| 526 |
|
|
|
| 527 |
|
|
seq_printf(seq, "battery technology: %srechargeable\n",
|
| 528 |
|
|
(!battery->technology)?"non-":"");
|
| 529 |
|
|
|
| 530 |
|
|
if (battery->design_voltage == ACPI_BATTERY_VALUE_UNKNOWN)
|
| 531 |
|
|
seq_printf(seq, "design voltage: unknown\n");
|
| 532 |
|
|
else
|
| 533 |
|
|
seq_printf(seq, "design voltage: %d mV\n",
|
| 534 |
|
|
battery->design_voltage);
|
| 535 |
|
|
seq_printf(seq, "design capacity warning: %d %sh\n",
|
| 536 |
|
|
battery->design_capacity_warning,
|
| 537 |
|
|
acpi_battery_units(battery));
|
| 538 |
|
|
seq_printf(seq, "design capacity low: %d %sh\n",
|
| 539 |
|
|
battery->design_capacity_low,
|
| 540 |
|
|
acpi_battery_units(battery));
|
| 541 |
|
|
seq_printf(seq, "capacity granularity 1: %d %sh\n",
|
| 542 |
|
|
battery->capacity_granularity_1,
|
| 543 |
|
|
acpi_battery_units(battery));
|
| 544 |
|
|
seq_printf(seq, "capacity granularity 2: %d %sh\n",
|
| 545 |
|
|
battery->capacity_granularity_2,
|
| 546 |
|
|
acpi_battery_units(battery));
|
| 547 |
|
|
seq_printf(seq, "model number: %s\n", battery->model_number);
|
| 548 |
|
|
seq_printf(seq, "serial number: %s\n", battery->serial_number);
|
| 549 |
|
|
seq_printf(seq, "battery type: %s\n", battery->type);
|
| 550 |
|
|
seq_printf(seq, "OEM info: %s\n", battery->oem_info);
|
| 551 |
|
|
end:
|
| 552 |
|
|
if (result)
|
| 553 |
|
|
seq_printf(seq, "ERROR: Unable to read battery info\n");
|
| 554 |
|
|
return result;
|
| 555 |
|
|
}
|
| 556 |
|
|
|
| 557 |
|
|
static int acpi_battery_print_state(struct seq_file *seq, int result)
|
| 558 |
|
|
{
|
| 559 |
|
|
struct acpi_battery *battery = seq->private;
|
| 560 |
|
|
|
| 561 |
|
|
if (result)
|
| 562 |
|
|
goto end;
|
| 563 |
|
|
|
| 564 |
|
|
seq_printf(seq, "present: %s\n",
|
| 565 |
|
|
acpi_battery_present(battery)?"yes":"no");
|
| 566 |
|
|
if (!acpi_battery_present(battery))
|
| 567 |
|
|
goto end;
|
| 568 |
|
|
|
| 569 |
|
|
seq_printf(seq, "capacity state: %s\n",
|
| 570 |
|
|
(battery->state & 0x04)?"critical":"ok");
|
| 571 |
|
|
if ((battery->state & 0x01) && (battery->state & 0x02))
|
| 572 |
|
|
seq_printf(seq,
|
| 573 |
|
|
"charging state: charging/discharging\n");
|
| 574 |
|
|
else if (battery->state & 0x01)
|
| 575 |
|
|
seq_printf(seq, "charging state: discharging\n");
|
| 576 |
|
|
else if (battery->state & 0x02)
|
| 577 |
|
|
seq_printf(seq, "charging state: charging\n");
|
| 578 |
|
|
else
|
| 579 |
|
|
seq_printf(seq, "charging state: charged\n");
|
| 580 |
|
|
|
| 581 |
|
|
if (battery->current_now == ACPI_BATTERY_VALUE_UNKNOWN)
|
| 582 |
|
|
seq_printf(seq, "present rate: unknown\n");
|
| 583 |
|
|
else
|
| 584 |
|
|
seq_printf(seq, "present rate: %d %s\n",
|
| 585 |
|
|
battery->current_now, acpi_battery_units(battery));
|
| 586 |
|
|
|
| 587 |
|
|
if (battery->capacity_now == ACPI_BATTERY_VALUE_UNKNOWN)
|
| 588 |
|
|
seq_printf(seq, "remaining capacity: unknown\n");
|
| 589 |
|
|
else
|
| 590 |
|
|
seq_printf(seq, "remaining capacity: %d %sh\n",
|
| 591 |
|
|
battery->capacity_now, acpi_battery_units(battery));
|
| 592 |
|
|
if (battery->voltage_now == ACPI_BATTERY_VALUE_UNKNOWN)
|
| 593 |
|
|
seq_printf(seq, "present voltage: unknown\n");
|
| 594 |
|
|
else
|
| 595 |
|
|
seq_printf(seq, "present voltage: %d mV\n",
|
| 596 |
|
|
battery->voltage_now);
|
| 597 |
|
|
end:
|
| 598 |
|
|
if (result)
|
| 599 |
|
|
seq_printf(seq, "ERROR: Unable to read battery state\n");
|
| 600 |
|
|
|
| 601 |
|
|
return result;
|
| 602 |
|
|
}
|
| 603 |
|
|
|
| 604 |
|
|
static int acpi_battery_print_alarm(struct seq_file *seq, int result)
|
| 605 |
|
|
{
|
| 606 |
|
|
struct acpi_battery *battery = seq->private;
|
| 607 |
|
|
|
| 608 |
|
|
if (result)
|
| 609 |
|
|
goto end;
|
| 610 |
|
|
|
| 611 |
|
|
if (!acpi_battery_present(battery)) {
|
| 612 |
|
|
seq_printf(seq, "present: no\n");
|
| 613 |
|
|
goto end;
|
| 614 |
|
|
}
|
| 615 |
|
|
seq_printf(seq, "alarm: ");
|
| 616 |
|
|
if (!battery->alarm)
|
| 617 |
|
|
seq_printf(seq, "unsupported\n");
|
| 618 |
|
|
else
|
| 619 |
|
|
seq_printf(seq, "%u %sh\n", battery->alarm,
|
| 620 |
|
|
acpi_battery_units(battery));
|
| 621 |
|
|
end:
|
| 622 |
|
|
if (result)
|
| 623 |
|
|
seq_printf(seq, "ERROR: Unable to read battery alarm\n");
|
| 624 |
|
|
return result;
|
| 625 |
|
|
}
|
| 626 |
|
|
|
| 627 |
|
|
static ssize_t acpi_battery_write_alarm(struct file *file,
|
| 628 |
|
|
const char __user * buffer,
|
| 629 |
|
|
size_t count, loff_t * ppos)
|
| 630 |
|
|
{
|
| 631 |
|
|
int result = 0;
|
| 632 |
|
|
char alarm_string[12] = { '\0' };
|
| 633 |
|
|
struct seq_file *m = file->private_data;
|
| 634 |
|
|
struct acpi_battery *battery = m->private;
|
| 635 |
|
|
|
| 636 |
|
|
if (!battery || (count > sizeof(alarm_string) - 1))
|
| 637 |
|
|
return -EINVAL;
|
| 638 |
|
|
if (!acpi_battery_present(battery)) {
|
| 639 |
|
|
result = -ENODEV;
|
| 640 |
|
|
goto end;
|
| 641 |
|
|
}
|
| 642 |
|
|
if (copy_from_user(alarm_string, buffer, count)) {
|
| 643 |
|
|
result = -EFAULT;
|
| 644 |
|
|
goto end;
|
| 645 |
|
|
}
|
| 646 |
|
|
alarm_string[count] = '\0';
|
| 647 |
|
|
battery->alarm = simple_strtol(alarm_string, NULL, 0);
|
| 648 |
|
|
result = acpi_battery_set_alarm(battery);
|
| 649 |
|
|
end:
|
| 650 |
|
|
if (!result)
|
| 651 |
|
|
return count;
|
| 652 |
|
|
return result;
|
| 653 |
|
|
}
|
| 654 |
|
|
|
| 655 |
|
|
typedef int(*print_func)(struct seq_file *seq, int result);
|
| 656 |
|
|
|
| 657 |
|
|
static print_func acpi_print_funcs[ACPI_BATTERY_NUMFILES] = {
|
| 658 |
|
|
acpi_battery_print_info,
|
| 659 |
|
|
acpi_battery_print_state,
|
| 660 |
|
|
acpi_battery_print_alarm,
|
| 661 |
|
|
};
|
| 662 |
|
|
|
| 663 |
|
|
static int acpi_battery_read(int fid, struct seq_file *seq)
|
| 664 |
|
|
{
|
| 665 |
|
|
struct acpi_battery *battery = seq->private;
|
| 666 |
|
|
int result = acpi_battery_update(battery);
|
| 667 |
|
|
return acpi_print_funcs[fid](seq, result);
|
| 668 |
|
|
}
|
| 669 |
|
|
|
| 670 |
|
|
#define DECLARE_FILE_FUNCTIONS(_name) \
|
| 671 |
|
|
static int acpi_battery_read_##_name(struct seq_file *seq, void *offset) \
|
| 672 |
|
|
{ \
|
| 673 |
|
|
return acpi_battery_read(_name##_tag, seq); \
|
| 674 |
|
|
} \
|
| 675 |
|
|
static int acpi_battery_##_name##_open_fs(struct inode *inode, struct file *file) \
|
| 676 |
|
|
{ \
|
| 677 |
|
|
return single_open(file, acpi_battery_read_##_name, PDE(inode)->data); \
|
| 678 |
|
|
}
|
| 679 |
|
|
|
| 680 |
|
|
DECLARE_FILE_FUNCTIONS(info);
|
| 681 |
|
|
DECLARE_FILE_FUNCTIONS(state);
|
| 682 |
|
|
DECLARE_FILE_FUNCTIONS(alarm);
|
| 683 |
|
|
|
| 684 |
|
|
#undef DECLARE_FILE_FUNCTIONS
|
| 685 |
|
|
|
| 686 |
|
|
#define FILE_DESCRIPTION_RO(_name) \
|
| 687 |
|
|
{ \
|
| 688 |
|
|
.name = __stringify(_name), \
|
| 689 |
|
|
.mode = S_IRUGO, \
|
| 690 |
|
|
.ops = { \
|
| 691 |
|
|
.open = acpi_battery_##_name##_open_fs, \
|
| 692 |
|
|
.read = seq_read, \
|
| 693 |
|
|
.llseek = seq_lseek, \
|
| 694 |
|
|
.release = single_release, \
|
| 695 |
|
|
.owner = THIS_MODULE, \
|
| 696 |
|
|
}, \
|
| 697 |
|
|
}
|
| 698 |
|
|
|
| 699 |
|
|
#define FILE_DESCRIPTION_RW(_name) \
|
| 700 |
|
|
{ \
|
| 701 |
|
|
.name = __stringify(_name), \
|
| 702 |
|
|
.mode = S_IFREG | S_IRUGO | S_IWUSR, \
|
| 703 |
|
|
.ops = { \
|
| 704 |
|
|
.open = acpi_battery_##_name##_open_fs, \
|
| 705 |
|
|
.read = seq_read, \
|
| 706 |
|
|
.llseek = seq_lseek, \
|
| 707 |
|
|
.write = acpi_battery_write_##_name, \
|
| 708 |
|
|
.release = single_release, \
|
| 709 |
|
|
.owner = THIS_MODULE, \
|
| 710 |
|
|
}, \
|
| 711 |
|
|
}
|
| 712 |
|
|
|
| 713 |
|
|
static struct battery_file {
|
| 714 |
|
|
struct file_operations ops;
|
| 715 |
|
|
mode_t mode;
|
| 716 |
|
|
char *name;
|
| 717 |
|
|
} acpi_battery_file[] = {
|
| 718 |
|
|
FILE_DESCRIPTION_RO(info),
|
| 719 |
|
|
FILE_DESCRIPTION_RO(state),
|
| 720 |
|
|
FILE_DESCRIPTION_RW(alarm),
|
| 721 |
|
|
};
|
| 722 |
|
|
|
| 723 |
|
|
#undef FILE_DESCRIPTION_RO
|
| 724 |
|
|
#undef FILE_DESCRIPTION_RW
|
| 725 |
|
|
|
| 726 |
|
|
static int acpi_battery_add_fs(struct acpi_device *device)
|
| 727 |
|
|
{
|
| 728 |
|
|
struct proc_dir_entry *entry = NULL;
|
| 729 |
|
|
int i;
|
| 730 |
|
|
|
| 731 |
|
|
if (!acpi_device_dir(device)) {
|
| 732 |
|
|
acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device),
|
| 733 |
|
|
acpi_battery_dir);
|
| 734 |
|
|
if (!acpi_device_dir(device))
|
| 735 |
|
|
return -ENODEV;
|
| 736 |
|
|
acpi_device_dir(device)->owner = THIS_MODULE;
|
| 737 |
|
|
}
|
| 738 |
|
|
|
| 739 |
|
|
for (i = 0; i < ACPI_BATTERY_NUMFILES; ++i) {
|
| 740 |
|
|
entry = create_proc_entry(acpi_battery_file[i].name,
|
| 741 |
|
|
acpi_battery_file[i].mode, acpi_device_dir(device));
|
| 742 |
|
|
if (!entry)
|
| 743 |
|
|
return -ENODEV;
|
| 744 |
|
|
else {
|
| 745 |
|
|
entry->proc_fops = &acpi_battery_file[i].ops;
|
| 746 |
|
|
entry->data = acpi_driver_data(device);
|
| 747 |
|
|
entry->owner = THIS_MODULE;
|
| 748 |
|
|
}
|
| 749 |
|
|
}
|
| 750 |
|
|
return 0;
|
| 751 |
|
|
}
|
| 752 |
|
|
|
| 753 |
|
|
static void acpi_battery_remove_fs(struct acpi_device *device)
|
| 754 |
|
|
{
|
| 755 |
|
|
int i;
|
| 756 |
|
|
if (!acpi_device_dir(device))
|
| 757 |
|
|
return;
|
| 758 |
|
|
for (i = 0; i < ACPI_BATTERY_NUMFILES; ++i)
|
| 759 |
|
|
remove_proc_entry(acpi_battery_file[i].name,
|
| 760 |
|
|
acpi_device_dir(device));
|
| 761 |
|
|
|
| 762 |
|
|
remove_proc_entry(acpi_device_bid(device), acpi_battery_dir);
|
| 763 |
|
|
acpi_device_dir(device) = NULL;
|
| 764 |
|
|
}
|
| 765 |
|
|
|
| 766 |
|
|
#endif
|
| 767 |
|
|
|
| 768 |
|
|
/* --------------------------------------------------------------------------
|
| 769 |
|
|
Driver Interface
|
| 770 |
|
|
-------------------------------------------------------------------------- */
|
| 771 |
|
|
|
| 772 |
|
|
static void acpi_battery_notify(acpi_handle handle, u32 event, void *data)
|
| 773 |
|
|
{
|
| 774 |
|
|
struct acpi_battery *battery = data;
|
| 775 |
|
|
struct acpi_device *device;
|
| 776 |
|
|
if (!battery)
|
| 777 |
|
|
return;
|
| 778 |
|
|
device = battery->device;
|
| 779 |
|
|
acpi_battery_update(battery);
|
| 780 |
|
|
acpi_bus_generate_proc_event(device, event,
|
| 781 |
|
|
acpi_battery_present(battery));
|
| 782 |
|
|
acpi_bus_generate_netlink_event(device->pnp.device_class,
|
| 783 |
|
|
device->dev.bus_id, event,
|
| 784 |
|
|
acpi_battery_present(battery));
|
| 785 |
|
|
#ifdef CONFIG_ACPI_SYSFS_POWER
|
| 786 |
|
|
/* acpi_batter_update could remove power_supply object */
|
| 787 |
|
|
if (battery->bat.dev)
|
| 788 |
|
|
kobject_uevent(&battery->bat.dev->kobj, KOBJ_CHANGE);
|
| 789 |
|
|
#endif
|
| 790 |
|
|
}
|
| 791 |
|
|
|
| 792 |
|
|
static int acpi_battery_add(struct acpi_device *device)
|
| 793 |
|
|
{
|
| 794 |
|
|
int result = 0;
|
| 795 |
|
|
acpi_status status = 0;
|
| 796 |
|
|
struct acpi_battery *battery = NULL;
|
| 797 |
|
|
if (!device)
|
| 798 |
|
|
return -EINVAL;
|
| 799 |
|
|
battery = kzalloc(sizeof(struct acpi_battery), GFP_KERNEL);
|
| 800 |
|
|
if (!battery)
|
| 801 |
|
|
return -ENOMEM;
|
| 802 |
|
|
battery->device = device;
|
| 803 |
|
|
strcpy(acpi_device_name(device), ACPI_BATTERY_DEVICE_NAME);
|
| 804 |
|
|
strcpy(acpi_device_class(device), ACPI_BATTERY_CLASS);
|
| 805 |
|
|
acpi_driver_data(device) = battery;
|
| 806 |
|
|
mutex_init(&battery->lock);
|
| 807 |
|
|
acpi_battery_update(battery);
|
| 808 |
|
|
#ifdef CONFIG_ACPI_PROCFS_POWER
|
| 809 |
|
|
result = acpi_battery_add_fs(device);
|
| 810 |
|
|
if (result)
|
| 811 |
|
|
goto end;
|
| 812 |
|
|
#endif
|
| 813 |
|
|
status = acpi_install_notify_handler(device->handle,
|
| 814 |
|
|
ACPI_ALL_NOTIFY,
|
| 815 |
|
|
acpi_battery_notify, battery);
|
| 816 |
|
|
if (ACPI_FAILURE(status)) {
|
| 817 |
|
|
ACPI_EXCEPTION((AE_INFO, status, "Installing notify handler"));
|
| 818 |
|
|
result = -ENODEV;
|
| 819 |
|
|
goto end;
|
| 820 |
|
|
}
|
| 821 |
|
|
printk(KERN_INFO PREFIX "%s Slot [%s] (battery %s)\n",
|
| 822 |
|
|
ACPI_BATTERY_DEVICE_NAME, acpi_device_bid(device),
|
| 823 |
|
|
device->status.battery_present ? "present" : "absent");
|
| 824 |
|
|
end:
|
| 825 |
|
|
if (result) {
|
| 826 |
|
|
#ifdef CONFIG_ACPI_PROCFS_POWER
|
| 827 |
|
|
acpi_battery_remove_fs(device);
|
| 828 |
|
|
#endif
|
| 829 |
|
|
kfree(battery);
|
| 830 |
|
|
}
|
| 831 |
|
|
return result;
|
| 832 |
|
|
}
|
| 833 |
|
|
|
| 834 |
|
|
static int acpi_battery_remove(struct acpi_device *device, int type)
|
| 835 |
|
|
{
|
| 836 |
|
|
acpi_status status = 0;
|
| 837 |
|
|
struct acpi_battery *battery = NULL;
|
| 838 |
|
|
|
| 839 |
|
|
if (!device || !acpi_driver_data(device))
|
| 840 |
|
|
return -EINVAL;
|
| 841 |
|
|
battery = acpi_driver_data(device);
|
| 842 |
|
|
status = acpi_remove_notify_handler(device->handle,
|
| 843 |
|
|
ACPI_ALL_NOTIFY,
|
| 844 |
|
|
acpi_battery_notify);
|
| 845 |
|
|
#ifdef CONFIG_ACPI_PROCFS_POWER
|
| 846 |
|
|
acpi_battery_remove_fs(device);
|
| 847 |
|
|
#endif
|
| 848 |
|
|
#ifdef CONFIG_ACPI_SYSFS_POWER
|
| 849 |
|
|
sysfs_remove_battery(battery);
|
| 850 |
|
|
#endif
|
| 851 |
|
|
mutex_destroy(&battery->lock);
|
| 852 |
|
|
kfree(battery);
|
| 853 |
|
|
return 0;
|
| 854 |
|
|
}
|
| 855 |
|
|
|
| 856 |
|
|
/* this is needed to learn about changes made in suspended state */
|
| 857 |
|
|
static int acpi_battery_resume(struct acpi_device *device)
|
| 858 |
|
|
{
|
| 859 |
|
|
struct acpi_battery *battery;
|
| 860 |
|
|
if (!device)
|
| 861 |
|
|
return -EINVAL;
|
| 862 |
|
|
battery = acpi_driver_data(device);
|
| 863 |
|
|
battery->update_time = 0;
|
| 864 |
|
|
acpi_battery_update(battery);
|
| 865 |
|
|
return 0;
|
| 866 |
|
|
}
|
| 867 |
|
|
|
| 868 |
|
|
static struct acpi_driver acpi_battery_driver = {
|
| 869 |
|
|
.name = "battery",
|
| 870 |
|
|
.class = ACPI_BATTERY_CLASS,
|
| 871 |
|
|
.ids = battery_device_ids,
|
| 872 |
|
|
.ops = {
|
| 873 |
|
|
.add = acpi_battery_add,
|
| 874 |
|
|
.resume = acpi_battery_resume,
|
| 875 |
|
|
.remove = acpi_battery_remove,
|
| 876 |
|
|
},
|
| 877 |
|
|
};
|
| 878 |
|
|
|
| 879 |
|
|
static int __init acpi_battery_init(void)
|
| 880 |
|
|
{
|
| 881 |
|
|
if (acpi_disabled)
|
| 882 |
|
|
return -ENODEV;
|
| 883 |
|
|
#ifdef CONFIG_ACPI_PROCFS_POWER
|
| 884 |
|
|
acpi_battery_dir = acpi_lock_battery_dir();
|
| 885 |
|
|
if (!acpi_battery_dir)
|
| 886 |
|
|
return -ENODEV;
|
| 887 |
|
|
#endif
|
| 888 |
|
|
if (acpi_bus_register_driver(&acpi_battery_driver) < 0) {
|
| 889 |
|
|
#ifdef CONFIG_ACPI_PROCFS_POWER
|
| 890 |
|
|
acpi_unlock_battery_dir(acpi_battery_dir);
|
| 891 |
|
|
#endif
|
| 892 |
|
|
return -ENODEV;
|
| 893 |
|
|
}
|
| 894 |
|
|
return 0;
|
| 895 |
|
|
}
|
| 896 |
|
|
|
| 897 |
|
|
static void __exit acpi_battery_exit(void)
|
| 898 |
|
|
{
|
| 899 |
|
|
acpi_bus_unregister_driver(&acpi_battery_driver);
|
| 900 |
|
|
#ifdef CONFIG_ACPI_PROCFS_POWER
|
| 901 |
|
|
acpi_unlock_battery_dir(acpi_battery_dir);
|
| 902 |
|
|
#endif
|
| 903 |
|
|
}
|
| 904 |
|
|
|
| 905 |
|
|
module_init(acpi_battery_init);
|
| 906 |
|
|
module_exit(acpi_battery_exit);
|
