aaad077638
Commit 558073dd56 ("ACPI: battery: Convert
discharge energy rate to current properly") caused the battery subsystem
to report wrong values of the remaining time on battery power and the
time until fully charged on Toshiba Portege R500 (and presumably on
other boxes too).
Fix the issue by correcting the conversion from mW to mA.
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
920 lines
25 KiB
C
920 lines
25 KiB
C
/*
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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_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;
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if (battery->power_unit) {
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val->intval *= 1000;
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} else {
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/*
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* If power units are mW, convert to mA by dividing by
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* current voltage.
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*/
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if (battery->voltage_now)
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val->intval /= battery->voltage_now;
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else
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val->intval = -1;
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}
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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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case POWER_SUPPLY_PROP_SERIAL_NUMBER:
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val->strval = battery->serial_number;
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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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POWER_SUPPLY_PROP_SERIAL_NUMBER,
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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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POWER_SUPPLY_PROP_SERIAL_NUMBER,
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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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/* --------------------------------------------------------------------------
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Battery Management
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-------------------------------------------------------------------------- */
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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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static struct acpi_offsets state_offsets[] = {
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{offsetof(struct acpi_battery, state), 0},
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{offsetof(struct acpi_battery, current_now), 0},
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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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static struct acpi_offsets info_offsets[] = {
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{offsetof(struct acpi_battery, power_unit), 0},
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{offsetof(struct acpi_battery, design_capacity), 0},
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{offsetof(struct acpi_battery, full_charge_capacity), 0},
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{offsetof(struct acpi_battery, technology), 0},
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{offsetof(struct acpi_battery, design_voltage), 0},
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{offsetof(struct acpi_battery, design_capacity_warning), 0},
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{offsetof(struct acpi_battery, design_capacity_low), 0},
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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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{offsetof(struct acpi_battery, model_number), 1},
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{offsetof(struct acpi_battery, serial_number), 1},
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{offsetof(struct acpi_battery, type), 1},
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{offsetof(struct acpi_battery, oem_info), 1},
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};
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static int extract_package(struct acpi_battery *battery,
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union acpi_object *package,
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struct acpi_offsets *offsets, int num)
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{
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int i;
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union acpi_object *element;
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if (package->type != ACPI_TYPE_PACKAGE)
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return -EFAULT;
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for (i = 0; i < num; ++i) {
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if (package->package.count <= i)
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return -EFAULT;
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element = &package->package.elements[i];
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if (offsets[i].mode) {
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u8 *ptr = (u8 *)battery + offsets[i].offset;
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if (element->type == ACPI_TYPE_STRING ||
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element->type == ACPI_TYPE_BUFFER)
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strncpy(ptr, element->string.pointer, 32);
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else if (element->type == ACPI_TYPE_INTEGER) {
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strncpy(ptr, (u8 *)&element->integer.value,
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sizeof(acpi_integer));
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ptr[sizeof(acpi_integer)] = 0;
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} else
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*ptr = 0; /* don't have value */
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} else {
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int *x = (int *)((u8 *)battery + offsets[i].offset);
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*x = (element->type == ACPI_TYPE_INTEGER) ?
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element->integer.value : -1;
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}
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}
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return 0;
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}
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static int acpi_battery_get_status(struct acpi_battery *battery)
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{
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if (acpi_bus_get_status(battery->device)) {
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ACPI_EXCEPTION((AE_INFO, AE_ERROR, "Evaluating _STA"));
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return -ENODEV;
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}
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return 0;
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}
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static int acpi_battery_get_info(struct acpi_battery *battery)
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{
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int result = -EFAULT;
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acpi_status status = 0;
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struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
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if (!acpi_battery_present(battery))
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return 0;
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mutex_lock(&battery->lock);
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status = acpi_evaluate_object(battery->device->handle, "_BIF",
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NULL, &buffer);
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mutex_unlock(&battery->lock);
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if (ACPI_FAILURE(status)) {
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ACPI_EXCEPTION((AE_INFO, status, "Evaluating _BIF"));
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return -ENODEV;
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}
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result = extract_package(battery, buffer.pointer,
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info_offsets, ARRAY_SIZE(info_offsets));
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kfree(buffer.pointer);
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return result;
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}
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static int acpi_battery_get_state(struct acpi_battery *battery)
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{
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int result = 0;
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acpi_status status = 0;
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struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
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if (!acpi_battery_present(battery))
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return 0;
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if (battery->update_time &&
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time_before(jiffies, battery->update_time +
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msecs_to_jiffies(cache_time)))
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return 0;
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mutex_lock(&battery->lock);
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status = acpi_evaluate_object(battery->device->handle, "_BST",
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NULL, &buffer);
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mutex_unlock(&battery->lock);
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if (ACPI_FAILURE(status)) {
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ACPI_EXCEPTION((AE_INFO, status, "Evaluating _BST"));
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return -ENODEV;
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}
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result = extract_package(battery, buffer.pointer,
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state_offsets, ARRAY_SIZE(state_offsets));
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battery->update_time = jiffies;
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kfree(buffer.pointer);
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return result;
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}
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static int acpi_battery_set_alarm(struct acpi_battery *battery)
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{
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acpi_status status = 0;
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union acpi_object arg0 = { .type = ACPI_TYPE_INTEGER };
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struct acpi_object_list arg_list = { 1, &arg0 };
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if (!acpi_battery_present(battery)|| !battery->alarm_present)
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return -ENODEV;
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arg0.integer.value = battery->alarm;
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mutex_lock(&battery->lock);
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status = acpi_evaluate_object(battery->device->handle, "_BTP",
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&arg_list, NULL);
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mutex_unlock(&battery->lock);
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if (ACPI_FAILURE(status))
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return -ENODEV;
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ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Alarm set to %d\n", battery->alarm));
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return 0;
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}
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static int acpi_battery_init_alarm(struct acpi_battery *battery)
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{
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acpi_status status = AE_OK;
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acpi_handle handle = NULL;
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/* See if alarms are supported, and if so, set default */
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status = acpi_get_handle(battery->device->handle, "_BTP", &handle);
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if (ACPI_FAILURE(status)) {
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battery->alarm_present = 0;
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return 0;
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}
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battery->alarm_present = 1;
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if (!battery->alarm)
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battery->alarm = battery->design_capacity_warning;
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return acpi_battery_set_alarm(battery);
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}
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#ifdef CONFIG_ACPI_SYSFS_POWER
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static ssize_t acpi_battery_alarm_show(struct device *dev,
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struct device_attribute *attr,
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char *buf)
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{
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struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev));
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return sprintf(buf, "%d\n", battery->alarm * 1000);
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}
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static ssize_t acpi_battery_alarm_store(struct device *dev,
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struct device_attribute *attr,
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const char *buf, size_t count)
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{
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unsigned long x;
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struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev));
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if (sscanf(buf, "%ld\n", &x) == 1)
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battery->alarm = x/1000;
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if (acpi_battery_present(battery))
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acpi_battery_set_alarm(battery);
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return count;
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}
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static struct device_attribute alarm_attr = {
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.attr = {.name = "alarm", .mode = 0644},
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.show = acpi_battery_alarm_show,
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.store = acpi_battery_alarm_store,
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};
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static int sysfs_add_battery(struct acpi_battery *battery)
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{
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int result;
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if (battery->power_unit) {
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battery->bat.properties = charge_battery_props;
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battery->bat.num_properties =
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ARRAY_SIZE(charge_battery_props);
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} else {
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battery->bat.properties = energy_battery_props;
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battery->bat.num_properties =
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ARRAY_SIZE(energy_battery_props);
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}
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battery->bat.name = acpi_device_bid(battery->device);
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battery->bat.type = POWER_SUPPLY_TYPE_BATTERY;
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battery->bat.get_property = acpi_battery_get_property;
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|
|
|
result = power_supply_register(&battery->device->dev, &battery->bat);
|
|
if (result)
|
|
return result;
|
|
return device_create_file(battery->bat.dev, &alarm_attr);
|
|
}
|
|
|
|
static void sysfs_remove_battery(struct acpi_battery *battery)
|
|
{
|
|
if (!battery->bat.dev)
|
|
return;
|
|
device_remove_file(battery->bat.dev, &alarm_attr);
|
|
power_supply_unregister(&battery->bat);
|
|
battery->bat.dev = NULL;
|
|
}
|
|
#endif
|
|
|
|
static int acpi_battery_update(struct acpi_battery *battery)
|
|
{
|
|
int result;
|
|
result = acpi_battery_get_status(battery);
|
|
if (result)
|
|
return result;
|
|
#ifdef CONFIG_ACPI_SYSFS_POWER
|
|
if (!acpi_battery_present(battery)) {
|
|
sysfs_remove_battery(battery);
|
|
battery->update_time = 0;
|
|
return 0;
|
|
}
|
|
#endif
|
|
if (!battery->update_time) {
|
|
result = acpi_battery_get_info(battery);
|
|
if (result)
|
|
return result;
|
|
acpi_battery_init_alarm(battery);
|
|
}
|
|
#ifdef CONFIG_ACPI_SYSFS_POWER
|
|
if (!battery->bat.dev)
|
|
sysfs_add_battery(battery);
|
|
#endif
|
|
return acpi_battery_get_state(battery);
|
|
}
|
|
|
|
/* --------------------------------------------------------------------------
|
|
FS Interface (/proc)
|
|
-------------------------------------------------------------------------- */
|
|
|
|
#ifdef CONFIG_ACPI_PROCFS_POWER
|
|
static struct proc_dir_entry *acpi_battery_dir;
|
|
|
|
static int acpi_battery_print_info(struct seq_file *seq, int result)
|
|
{
|
|
struct acpi_battery *battery = seq->private;
|
|
|
|
if (result)
|
|
goto end;
|
|
|
|
seq_printf(seq, "present: %s\n",
|
|
acpi_battery_present(battery)?"yes":"no");
|
|
if (!acpi_battery_present(battery))
|
|
goto end;
|
|
if (battery->design_capacity == ACPI_BATTERY_VALUE_UNKNOWN)
|
|
seq_printf(seq, "design capacity: unknown\n");
|
|
else
|
|
seq_printf(seq, "design capacity: %d %sh\n",
|
|
battery->design_capacity,
|
|
acpi_battery_units(battery));
|
|
|
|
if (battery->full_charge_capacity == ACPI_BATTERY_VALUE_UNKNOWN)
|
|
seq_printf(seq, "last full capacity: unknown\n");
|
|
else
|
|
seq_printf(seq, "last full capacity: %d %sh\n",
|
|
battery->full_charge_capacity,
|
|
acpi_battery_units(battery));
|
|
|
|
seq_printf(seq, "battery technology: %srechargeable\n",
|
|
(!battery->technology)?"non-":"");
|
|
|
|
if (battery->design_voltage == ACPI_BATTERY_VALUE_UNKNOWN)
|
|
seq_printf(seq, "design voltage: unknown\n");
|
|
else
|
|
seq_printf(seq, "design voltage: %d mV\n",
|
|
battery->design_voltage);
|
|
seq_printf(seq, "design capacity warning: %d %sh\n",
|
|
battery->design_capacity_warning,
|
|
acpi_battery_units(battery));
|
|
seq_printf(seq, "design capacity low: %d %sh\n",
|
|
battery->design_capacity_low,
|
|
acpi_battery_units(battery));
|
|
seq_printf(seq, "capacity granularity 1: %d %sh\n",
|
|
battery->capacity_granularity_1,
|
|
acpi_battery_units(battery));
|
|
seq_printf(seq, "capacity granularity 2: %d %sh\n",
|
|
battery->capacity_granularity_2,
|
|
acpi_battery_units(battery));
|
|
seq_printf(seq, "model number: %s\n", battery->model_number);
|
|
seq_printf(seq, "serial number: %s\n", battery->serial_number);
|
|
seq_printf(seq, "battery type: %s\n", battery->type);
|
|
seq_printf(seq, "OEM info: %s\n", battery->oem_info);
|
|
end:
|
|
if (result)
|
|
seq_printf(seq, "ERROR: Unable to read battery info\n");
|
|
return result;
|
|
}
|
|
|
|
static int acpi_battery_print_state(struct seq_file *seq, int result)
|
|
{
|
|
struct acpi_battery *battery = seq->private;
|
|
|
|
if (result)
|
|
goto end;
|
|
|
|
seq_printf(seq, "present: %s\n",
|
|
acpi_battery_present(battery)?"yes":"no");
|
|
if (!acpi_battery_present(battery))
|
|
goto end;
|
|
|
|
seq_printf(seq, "capacity state: %s\n",
|
|
(battery->state & 0x04)?"critical":"ok");
|
|
if ((battery->state & 0x01) && (battery->state & 0x02))
|
|
seq_printf(seq,
|
|
"charging state: charging/discharging\n");
|
|
else if (battery->state & 0x01)
|
|
seq_printf(seq, "charging state: discharging\n");
|
|
else if (battery->state & 0x02)
|
|
seq_printf(seq, "charging state: charging\n");
|
|
else
|
|
seq_printf(seq, "charging state: charged\n");
|
|
|
|
if (battery->current_now == ACPI_BATTERY_VALUE_UNKNOWN)
|
|
seq_printf(seq, "present rate: unknown\n");
|
|
else
|
|
seq_printf(seq, "present rate: %d %s\n",
|
|
battery->current_now, acpi_battery_units(battery));
|
|
|
|
if (battery->capacity_now == ACPI_BATTERY_VALUE_UNKNOWN)
|
|
seq_printf(seq, "remaining capacity: unknown\n");
|
|
else
|
|
seq_printf(seq, "remaining capacity: %d %sh\n",
|
|
battery->capacity_now, acpi_battery_units(battery));
|
|
if (battery->voltage_now == ACPI_BATTERY_VALUE_UNKNOWN)
|
|
seq_printf(seq, "present voltage: unknown\n");
|
|
else
|
|
seq_printf(seq, "present voltage: %d mV\n",
|
|
battery->voltage_now);
|
|
end:
|
|
if (result)
|
|
seq_printf(seq, "ERROR: Unable to read battery state\n");
|
|
|
|
return result;
|
|
}
|
|
|
|
static int acpi_battery_print_alarm(struct seq_file *seq, int result)
|
|
{
|
|
struct acpi_battery *battery = seq->private;
|
|
|
|
if (result)
|
|
goto end;
|
|
|
|
if (!acpi_battery_present(battery)) {
|
|
seq_printf(seq, "present: no\n");
|
|
goto end;
|
|
}
|
|
seq_printf(seq, "alarm: ");
|
|
if (!battery->alarm)
|
|
seq_printf(seq, "unsupported\n");
|
|
else
|
|
seq_printf(seq, "%u %sh\n", battery->alarm,
|
|
acpi_battery_units(battery));
|
|
end:
|
|
if (result)
|
|
seq_printf(seq, "ERROR: Unable to read battery alarm\n");
|
|
return result;
|
|
}
|
|
|
|
static ssize_t acpi_battery_write_alarm(struct file *file,
|
|
const char __user * buffer,
|
|
size_t count, loff_t * ppos)
|
|
{
|
|
int result = 0;
|
|
char alarm_string[12] = { '\0' };
|
|
struct seq_file *m = file->private_data;
|
|
struct acpi_battery *battery = m->private;
|
|
|
|
if (!battery || (count > sizeof(alarm_string) - 1))
|
|
return -EINVAL;
|
|
if (!acpi_battery_present(battery)) {
|
|
result = -ENODEV;
|
|
goto end;
|
|
}
|
|
if (copy_from_user(alarm_string, buffer, count)) {
|
|
result = -EFAULT;
|
|
goto end;
|
|
}
|
|
alarm_string[count] = '\0';
|
|
battery->alarm = simple_strtol(alarm_string, NULL, 0);
|
|
result = acpi_battery_set_alarm(battery);
|
|
end:
|
|
if (!result)
|
|
return count;
|
|
return result;
|
|
}
|
|
|
|
typedef int(*print_func)(struct seq_file *seq, int result);
|
|
|
|
static print_func acpi_print_funcs[ACPI_BATTERY_NUMFILES] = {
|
|
acpi_battery_print_info,
|
|
acpi_battery_print_state,
|
|
acpi_battery_print_alarm,
|
|
};
|
|
|
|
static int acpi_battery_read(int fid, struct seq_file *seq)
|
|
{
|
|
struct acpi_battery *battery = seq->private;
|
|
int result = acpi_battery_update(battery);
|
|
return acpi_print_funcs[fid](seq, result);
|
|
}
|
|
|
|
#define DECLARE_FILE_FUNCTIONS(_name) \
|
|
static int acpi_battery_read_##_name(struct seq_file *seq, void *offset) \
|
|
{ \
|
|
return acpi_battery_read(_name##_tag, seq); \
|
|
} \
|
|
static int acpi_battery_##_name##_open_fs(struct inode *inode, struct file *file) \
|
|
{ \
|
|
return single_open(file, acpi_battery_read_##_name, PDE(inode)->data); \
|
|
}
|
|
|
|
DECLARE_FILE_FUNCTIONS(info);
|
|
DECLARE_FILE_FUNCTIONS(state);
|
|
DECLARE_FILE_FUNCTIONS(alarm);
|
|
|
|
#undef DECLARE_FILE_FUNCTIONS
|
|
|
|
#define FILE_DESCRIPTION_RO(_name) \
|
|
{ \
|
|
.name = __stringify(_name), \
|
|
.mode = S_IRUGO, \
|
|
.ops = { \
|
|
.open = acpi_battery_##_name##_open_fs, \
|
|
.read = seq_read, \
|
|
.llseek = seq_lseek, \
|
|
.release = single_release, \
|
|
.owner = THIS_MODULE, \
|
|
}, \
|
|
}
|
|
|
|
#define FILE_DESCRIPTION_RW(_name) \
|
|
{ \
|
|
.name = __stringify(_name), \
|
|
.mode = S_IFREG | S_IRUGO | S_IWUSR, \
|
|
.ops = { \
|
|
.open = acpi_battery_##_name##_open_fs, \
|
|
.read = seq_read, \
|
|
.llseek = seq_lseek, \
|
|
.write = acpi_battery_write_##_name, \
|
|
.release = single_release, \
|
|
.owner = THIS_MODULE, \
|
|
}, \
|
|
}
|
|
|
|
static struct battery_file {
|
|
struct file_operations ops;
|
|
mode_t mode;
|
|
char *name;
|
|
} acpi_battery_file[] = {
|
|
FILE_DESCRIPTION_RO(info),
|
|
FILE_DESCRIPTION_RO(state),
|
|
FILE_DESCRIPTION_RW(alarm),
|
|
};
|
|
|
|
#undef FILE_DESCRIPTION_RO
|
|
#undef FILE_DESCRIPTION_RW
|
|
|
|
static int acpi_battery_add_fs(struct acpi_device *device)
|
|
{
|
|
struct proc_dir_entry *entry = NULL;
|
|
int i;
|
|
|
|
if (!acpi_device_dir(device)) {
|
|
acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device),
|
|
acpi_battery_dir);
|
|
if (!acpi_device_dir(device))
|
|
return -ENODEV;
|
|
acpi_device_dir(device)->owner = THIS_MODULE;
|
|
}
|
|
|
|
for (i = 0; i < ACPI_BATTERY_NUMFILES; ++i) {
|
|
entry = proc_create_data(acpi_battery_file[i].name,
|
|
acpi_battery_file[i].mode,
|
|
acpi_device_dir(device),
|
|
&acpi_battery_file[i].ops,
|
|
acpi_driver_data(device));
|
|
if (!entry)
|
|
return -ENODEV;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static void acpi_battery_remove_fs(struct acpi_device *device)
|
|
{
|
|
int i;
|
|
if (!acpi_device_dir(device))
|
|
return;
|
|
for (i = 0; i < ACPI_BATTERY_NUMFILES; ++i)
|
|
remove_proc_entry(acpi_battery_file[i].name,
|
|
acpi_device_dir(device));
|
|
|
|
remove_proc_entry(acpi_device_bid(device), acpi_battery_dir);
|
|
acpi_device_dir(device) = NULL;
|
|
}
|
|
|
|
#endif
|
|
|
|
/* --------------------------------------------------------------------------
|
|
Driver Interface
|
|
-------------------------------------------------------------------------- */
|
|
|
|
static void acpi_battery_notify(acpi_handle handle, u32 event, void *data)
|
|
{
|
|
struct acpi_battery *battery = data;
|
|
struct acpi_device *device;
|
|
if (!battery)
|
|
return;
|
|
device = battery->device;
|
|
acpi_battery_update(battery);
|
|
acpi_bus_generate_proc_event(device, event,
|
|
acpi_battery_present(battery));
|
|
acpi_bus_generate_netlink_event(device->pnp.device_class,
|
|
dev_name(&device->dev), event,
|
|
acpi_battery_present(battery));
|
|
#ifdef CONFIG_ACPI_SYSFS_POWER
|
|
/* acpi_batter_update could remove power_supply object */
|
|
if (battery->bat.dev)
|
|
kobject_uevent(&battery->bat.dev->kobj, KOBJ_CHANGE);
|
|
#endif
|
|
}
|
|
|
|
static int acpi_battery_add(struct acpi_device *device)
|
|
{
|
|
int result = 0;
|
|
acpi_status status = 0;
|
|
struct acpi_battery *battery = NULL;
|
|
if (!device)
|
|
return -EINVAL;
|
|
battery = kzalloc(sizeof(struct acpi_battery), GFP_KERNEL);
|
|
if (!battery)
|
|
return -ENOMEM;
|
|
battery->device = device;
|
|
strcpy(acpi_device_name(device), ACPI_BATTERY_DEVICE_NAME);
|
|
strcpy(acpi_device_class(device), ACPI_BATTERY_CLASS);
|
|
device->driver_data = battery;
|
|
mutex_init(&battery->lock);
|
|
acpi_battery_update(battery);
|
|
#ifdef CONFIG_ACPI_PROCFS_POWER
|
|
result = acpi_battery_add_fs(device);
|
|
if (result)
|
|
goto end;
|
|
#endif
|
|
status = acpi_install_notify_handler(device->handle,
|
|
ACPI_ALL_NOTIFY,
|
|
acpi_battery_notify, battery);
|
|
if (ACPI_FAILURE(status)) {
|
|
ACPI_EXCEPTION((AE_INFO, status, "Installing notify handler"));
|
|
result = -ENODEV;
|
|
goto end;
|
|
}
|
|
printk(KERN_INFO PREFIX "%s Slot [%s] (battery %s)\n",
|
|
ACPI_BATTERY_DEVICE_NAME, acpi_device_bid(device),
|
|
device->status.battery_present ? "present" : "absent");
|
|
end:
|
|
if (result) {
|
|
#ifdef CONFIG_ACPI_PROCFS_POWER
|
|
acpi_battery_remove_fs(device);
|
|
#endif
|
|
kfree(battery);
|
|
}
|
|
return result;
|
|
}
|
|
|
|
static int acpi_battery_remove(struct acpi_device *device, int type)
|
|
{
|
|
acpi_status status = 0;
|
|
struct acpi_battery *battery = NULL;
|
|
|
|
if (!device || !acpi_driver_data(device))
|
|
return -EINVAL;
|
|
battery = acpi_driver_data(device);
|
|
status = acpi_remove_notify_handler(device->handle,
|
|
ACPI_ALL_NOTIFY,
|
|
acpi_battery_notify);
|
|
#ifdef CONFIG_ACPI_PROCFS_POWER
|
|
acpi_battery_remove_fs(device);
|
|
#endif
|
|
#ifdef CONFIG_ACPI_SYSFS_POWER
|
|
sysfs_remove_battery(battery);
|
|
#endif
|
|
mutex_destroy(&battery->lock);
|
|
kfree(battery);
|
|
return 0;
|
|
}
|
|
|
|
/* this is needed to learn about changes made in suspended state */
|
|
static int acpi_battery_resume(struct acpi_device *device)
|
|
{
|
|
struct acpi_battery *battery;
|
|
if (!device)
|
|
return -EINVAL;
|
|
battery = acpi_driver_data(device);
|
|
battery->update_time = 0;
|
|
acpi_battery_update(battery);
|
|
return 0;
|
|
}
|
|
|
|
static struct acpi_driver acpi_battery_driver = {
|
|
.name = "battery",
|
|
.class = ACPI_BATTERY_CLASS,
|
|
.ids = battery_device_ids,
|
|
.ops = {
|
|
.add = acpi_battery_add,
|
|
.resume = acpi_battery_resume,
|
|
.remove = acpi_battery_remove,
|
|
},
|
|
};
|
|
|
|
static int __init acpi_battery_init(void)
|
|
{
|
|
if (acpi_disabled)
|
|
return -ENODEV;
|
|
#ifdef CONFIG_ACPI_PROCFS_POWER
|
|
acpi_battery_dir = acpi_lock_battery_dir();
|
|
if (!acpi_battery_dir)
|
|
return -ENODEV;
|
|
#endif
|
|
if (acpi_bus_register_driver(&acpi_battery_driver) < 0) {
|
|
#ifdef CONFIG_ACPI_PROCFS_POWER
|
|
acpi_unlock_battery_dir(acpi_battery_dir);
|
|
#endif
|
|
return -ENODEV;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static void __exit acpi_battery_exit(void)
|
|
{
|
|
acpi_bus_unregister_driver(&acpi_battery_driver);
|
|
#ifdef CONFIG_ACPI_PROCFS_POWER
|
|
acpi_unlock_battery_dir(acpi_battery_dir);
|
|
#endif
|
|
}
|
|
|
|
module_init(acpi_battery_init);
|
|
module_exit(acpi_battery_exit);
|