/*
* battery.c - ACPI Battery Driver (Revision: 2.0)
*
* Copyright (C) 2007 Alexey Starikovskiy <astarikovskiy@suse.de>
* Copyright (C) 2004-2007 Vladimir Lebedev <vladimir.p.lebedev@intel.com>
* Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com>
* Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
*
* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or (at
* your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
*
* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/types.h>
#include <linux/jiffies.h>
#include <linux/async.h>
#include <linux/dmi.h>
#include <linux/delay.h>
#include <linux/slab.h>
#include <linux/suspend.h>
#include <asm/unaligned.h>
#ifdef CONFIG_ACPI_PROCFS_POWER
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <asm/uaccess.h>
#endif
#include <linux/acpi.h>
#include <linux/power_supply.h>
#include "battery.h"
#define PREFIX "ACPI: "
#define ACPI_BATTERY_VALUE_UNKNOWN 0xFFFFFFFF
#define ACPI_BATTERY_DEVICE_NAME "Battery"
/* Battery power unit: 0 means mW, 1 means mA */
#define ACPI_BATTERY_POWER_UNIT_MA 1
#define ACPI_BATTERY_STATE_DISCHARGING 0x1
#define ACPI_BATTERY_STATE_CHARGING 0x2
#define ACPI_BATTERY_STATE_CRITICAL 0x4
#define _COMPONENT ACPI_BATTERY_COMPONENT
ACPI_MODULE_NAME("battery");
MODULE_AUTHOR("Paul Diefenbaugh");
MODULE_AUTHOR("Alexey Starikovskiy <astarikovskiy@suse.de>");
MODULE_DESCRIPTION("ACPI Battery Driver");
MODULE_LICENSE("GPL");
static int battery_bix_broken_package;
static int battery_notification_delay_ms;
static unsigned int cache_time = 1000;
module_param(cache_time, uint, 0644);
MODULE_PARM_DESC(cache_time, "cache time in milliseconds");
#ifdef CONFIG_ACPI_PROCFS_POWER
extern struct proc_dir_entry *acpi_lock_battery_dir(void);
extern void *acpi_unlock_battery_dir(struct proc_dir_entry *acpi_battery_dir);
enum acpi_battery_files {
info_tag = 0,
state_tag,
alarm_tag,
ACPI_BATTERY_NUMFILES,
};
#endif
static const struct acpi_device_id battery_device_ids[] = {
{"PNP0C0A", 0},
{"", 0},
};
MODULE_DEVICE_TABLE(acpi, battery_device_ids);
enum {
ACPI_BATTERY_ALARM_PRESENT,
ACPI_BATTERY_XINFO_PRESENT,
ACPI_BATTERY_QUIRK_PERCENTAGE_CAPACITY,
/* On Lenovo Thinkpad models from 2010 and 2011, the power unit
switches between mWh and mAh depending on whether the system
is running on battery or not. When mAh is the unit, most
reported values are incorrect and need to be adjusted by
10000/design_voltage. Verified on x201, t410, t410s, and x220.
Pre-2010 and 2012 models appear to always report in mWh and
are thus unaffected (tested with t42, t61, t500, x200, x300,
and x230). Also, in mid-2012 Lenovo issued a BIOS update for
the 2011 models that fixes the issue (tested on x220 with a
post-1.29 BIOS), but as of Nov. 2012, no such update is
available for the 2010 models. */
ACPI_BATTERY_QUIRK_THINKPAD_MAH,
};
struct acpi_battery {
struct mutex lock;
struct mutex sysfs_lock;
struct power_supply *bat;
struct