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![Hans de Goede](/assets/img/avatar_default.png)
On some devices (with a buggy _BIX implementation) full_charge_capacity always reports as 0. This means that our energy_full sysfs attribute will also always be 0, which is not useful to export. Worse we calculate our reported capacity on full_charge_capacity and if it is 0 we always report 0. This causes userspace to immediately shutdown or hibernate the laptop since it assumes that the battery is critically low. This commit makes us not report energy_full[_design] or capacity on such broken devices, avoiding the immediate shutdown / hibernate from userspace. Link: https://bugzilla.kernel.org/show_bug.cgi?id=83941 Signed-off-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
1547 lines
45 KiB
C
1547 lines
45 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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* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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*/
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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#include <linux/async.h>
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#include <linux/delay.h>
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#include <linux/dmi.h>
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#include <linux/jiffies.h>
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#include <linux/kernel.h>
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#include <linux/list.h>
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#include <linux/module.h>
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#include <linux/mutex.h>
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#include <linux/slab.h>
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#include <linux/suspend.h>
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#include <linux/types.h>
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#include <asm/unaligned.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 <linux/uaccess.h>
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#endif
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#include <linux/acpi.h>
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#include <linux/power_supply.h>
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#include <acpi/battery.h>
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#define PREFIX "ACPI: "
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#define ACPI_BATTERY_VALUE_UNKNOWN 0xFFFFFFFF
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#define ACPI_BATTERY_DEVICE_NAME "Battery"
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/* Battery power unit: 0 means mW, 1 means mA */
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#define ACPI_BATTERY_POWER_UNIT_MA 1
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#define ACPI_BATTERY_STATE_DISCHARGING 0x1
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#define ACPI_BATTERY_STATE_CHARGING 0x2
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#define ACPI_BATTERY_STATE_CRITICAL 0x4
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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 async_cookie_t async_cookie;
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static bool battery_driver_registered;
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static int battery_bix_broken_package;
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static int battery_notification_delay_ms;
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static int battery_ac_is_broken;
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static int battery_check_pmic = 1;
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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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#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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/* Lists of PMIC ACPI HIDs with an (often better) native battery driver */
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static const char * const acpi_battery_blacklist[] = {
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"INT33F4", /* X-Powers AXP288 PMIC */
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};
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enum {
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ACPI_BATTERY_ALARM_PRESENT,
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ACPI_BATTERY_XINFO_PRESENT,
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ACPI_BATTERY_QUIRK_PERCENTAGE_CAPACITY,
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/* On Lenovo Thinkpad models from 2010 and 2011, the power unit
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switches between mWh and mAh depending on whether the system
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is running on battery or not. When mAh is the unit, most
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reported values are incorrect and need to be adjusted by
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10000/design_voltage. Verified on x201, t410, t410s, and x220.
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Pre-2010 and 2012 models appear to always report in mWh and
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are thus unaffected (tested with t42, t61, t500, x200, x300,
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and x230). Also, in mid-2012 Lenovo issued a BIOS update for
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the 2011 models that fixes the issue (tested on x220 with a
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post-1.29 BIOS), but as of Nov. 2012, no such update is
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available for the 2010 models. */
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ACPI_BATTERY_QUIRK_THINKPAD_MAH,
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/* for batteries reporting current capacity with design capacity
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* on a full charge, but showing degradation in full charge cap.
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*/
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ACPI_BATTERY_QUIRK_DEGRADED_FULL_CHARGE,
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};
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struct acpi_battery {
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struct mutex lock;
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struct mutex sysfs_lock;
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struct power_supply *bat;
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struct power_supply_desc bat_desc;
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struct acpi_device *device;
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struct notifier_block pm_nb;
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struct list_head list;
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unsigned long update_time;
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int revision;
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int rate_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 cycle_count;
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int measurement_accuracy;
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int max_sampling_time;
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int min_sampling_time;
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int max_averaging_interval;
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int min_averaging_interval;
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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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unsigned long flags;
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};
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#define to_acpi_battery(x) power_supply_get_drvdata(x)
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static 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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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_is_charged(struct acpi_battery *battery)
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{
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/* charging, discharging or critical low */
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if (battery->state != 0)
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return 0;
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/* battery not reporting charge */
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if (battery->capacity_now == ACPI_BATTERY_VALUE_UNKNOWN ||
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battery->capacity_now == 0)
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return 0;
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/* good batteries update full_charge as the batteries degrade */
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if (battery->full_charge_capacity == battery->capacity_now)
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return 1;
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/* fallback to using design values for broken batteries */
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if (battery->design_capacity == battery->capacity_now)
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return 1;
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/* we don't do any sort of metric based on percentages */
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return 0;
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}
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static bool acpi_battery_is_degraded(struct acpi_battery *battery)
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{
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return battery->full_charge_capacity && battery->design_capacity &&
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battery->full_charge_capacity < battery->design_capacity;
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}
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static int acpi_battery_handle_discharging(struct acpi_battery *battery)
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{
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/*
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* Some devices wrongly report discharging if the battery's charge level
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* was above the device's start charging threshold atm the AC adapter
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* was plugged in and the device thus did not start a new charge cycle.
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*/
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if ((battery_ac_is_broken || power_supply_is_system_supplied()) &&
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battery->rate_now == 0)
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return POWER_SUPPLY_STATUS_NOT_CHARGING;
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return POWER_SUPPLY_STATUS_DISCHARGING;
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}
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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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int ret = 0;
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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 & ACPI_BATTERY_STATE_DISCHARGING)
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val->intval = acpi_battery_handle_discharging(battery);
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else if (battery->state & ACPI_BATTERY_STATE_CHARGING)
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val->intval = POWER_SUPPLY_STATUS_CHARGING;
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else if (acpi_battery_is_charged(battery))
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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_CYCLE_COUNT:
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val->intval = battery->cycle_count;
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break;
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case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:
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if (battery->design_voltage == ACPI_BATTERY_VALUE_UNKNOWN)
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ret = -ENODEV;
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else
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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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if (battery->voltage_now == ACPI_BATTERY_VALUE_UNKNOWN)
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ret = -ENODEV;
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else
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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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case POWER_SUPPLY_PROP_POWER_NOW:
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if (battery->rate_now == ACPI_BATTERY_VALUE_UNKNOWN)
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ret = -ENODEV;
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else
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val->intval = battery->rate_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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if (battery->design_capacity == ACPI_BATTERY_VALUE_UNKNOWN)
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ret = -ENODEV;
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else
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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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if (battery->full_charge_capacity == ACPI_BATTERY_VALUE_UNKNOWN)
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ret = -ENODEV;
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else
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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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if (battery->capacity_now == ACPI_BATTERY_VALUE_UNKNOWN)
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ret = -ENODEV;
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else
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val->intval = battery->capacity_now * 1000;
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break;
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case POWER_SUPPLY_PROP_CAPACITY:
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if (battery->capacity_now && battery->full_charge_capacity)
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val->intval = battery->capacity_now * 100/
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battery->full_charge_capacity;
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else
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val->intval = 0;
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break;
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case POWER_SUPPLY_PROP_CAPACITY_LEVEL:
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if (battery->state & ACPI_BATTERY_STATE_CRITICAL)
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val->intval = POWER_SUPPLY_CAPACITY_LEVEL_CRITICAL;
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else if (test_bit(ACPI_BATTERY_ALARM_PRESENT, &battery->flags) &&
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(battery->capacity_now <= battery->alarm))
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val->intval = POWER_SUPPLY_CAPACITY_LEVEL_LOW;
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else if (acpi_battery_is_charged(battery))
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val->intval = POWER_SUPPLY_CAPACITY_LEVEL_FULL;
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else
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val->intval = POWER_SUPPLY_CAPACITY_LEVEL_NORMAL;
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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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ret = -EINVAL;
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}
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return ret;
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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_CYCLE_COUNT,
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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_CAPACITY,
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POWER_SUPPLY_PROP_CAPACITY_LEVEL,
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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_CYCLE_COUNT,
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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_POWER_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_CAPACITY,
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POWER_SUPPLY_PROP_CAPACITY_LEVEL,
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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_full_cap_broken_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_CYCLE_COUNT,
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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_POWER_NOW,
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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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/* --------------------------------------------------------------------------
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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 const struct acpi_offsets state_offsets[] = {
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{offsetof(struct acpi_battery, state), 0},
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{offsetof(struct acpi_battery, rate_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 const 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 const struct acpi_offsets extended_info_offsets[] = {
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{offsetof(struct acpi_battery, revision), 0},
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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, cycle_count), 0},
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{offsetof(struct acpi_battery, measurement_accuracy), 0},
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{offsetof(struct acpi_battery, max_sampling_time), 0},
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{offsetof(struct acpi_battery, min_sampling_time), 0},
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{offsetof(struct acpi_battery, max_averaging_interval), 0},
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{offsetof(struct acpi_battery, min_averaging_interval), 0},
|
|
{offsetof(struct acpi_battery, capacity_granularity_1), 0},
|
|
{offsetof(struct acpi_battery, capacity_granularity_2), 0},
|
|
{offsetof(struct acpi_battery, model_number), 1},
|
|
{offsetof(struct acpi_battery, serial_number), 1},
|
|
{offsetof(struct acpi_battery, type), 1},
|
|
{offsetof(struct acpi_battery, oem_info), 1},
|
|
};
|
|
|
|
static int extract_package(struct acpi_battery *battery,
|
|
union acpi_object *package,
|
|
const struct acpi_offsets *offsets, int num)
|
|
{
|
|
int i;
|
|
union acpi_object *element;
|
|
if (package->type != ACPI_TYPE_PACKAGE)
|
|
return -EFAULT;
|
|
for (i = 0; i < num; ++i) {
|
|
if (package->package.count <= i)
|
|
return -EFAULT;
|
|
element = &package->package.elements[i];
|
|
if (offsets[i].mode) {
|
|
u8 *ptr = (u8 *)battery + offsets[i].offset;
|
|
if (element->type == ACPI_TYPE_STRING ||
|
|
element->type == ACPI_TYPE_BUFFER)
|
|
strncpy(ptr, element->string.pointer, 32);
|
|
else if (element->type == ACPI_TYPE_INTEGER) {
|
|
strncpy(ptr, (u8 *)&element->integer.value,
|
|
sizeof(u64));
|
|
ptr[sizeof(u64)] = 0;
|
|
} else
|
|
*ptr = 0; /* don't have value */
|
|
} else {
|
|
int *x = (int *)((u8 *)battery + offsets[i].offset);
|
|
*x = (element->type == ACPI_TYPE_INTEGER) ?
|
|
element->integer.value : -1;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int acpi_battery_get_status(struct acpi_battery *battery)
|
|
{
|
|
if (acpi_bus_get_status(battery->device)) {
|
|
ACPI_EXCEPTION((AE_INFO, AE_ERROR, "Evaluating _STA"));
|
|
return -ENODEV;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int extract_battery_info(const int use_bix,
|
|
struct acpi_battery *battery,
|
|
const struct acpi_buffer *buffer)
|
|
{
|
|
int result = -EFAULT;
|
|
|
|
if (use_bix && battery_bix_broken_package)
|
|
result = extract_package(battery, buffer->pointer,
|
|
extended_info_offsets + 1,
|
|
ARRAY_SIZE(extended_info_offsets) - 1);
|
|
else if (use_bix)
|
|
result = extract_package(battery, buffer->pointer,
|
|
extended_info_offsets,
|
|
ARRAY_SIZE(extended_info_offsets));
|
|
else
|
|
result = extract_package(battery, buffer->pointer,
|
|
info_offsets, ARRAY_SIZE(info_offsets));
|
|
if (test_bit(ACPI_BATTERY_QUIRK_PERCENTAGE_CAPACITY, &battery->flags))
|
|
battery->full_charge_capacity = battery->design_capacity;
|
|
if (test_bit(ACPI_BATTERY_QUIRK_THINKPAD_MAH, &battery->flags) &&
|
|
battery->power_unit && battery->design_voltage) {
|
|
battery->design_capacity = battery->design_capacity *
|
|
10000 / battery->design_voltage;
|
|
battery->full_charge_capacity = battery->full_charge_capacity *
|
|
10000 / battery->design_voltage;
|
|
battery->design_capacity_warning =
|
|
battery->design_capacity_warning *
|
|
10000 / battery->design_voltage;
|
|
/* Curiously, design_capacity_low, unlike the rest of them,
|
|
is correct. */
|
|
/* capacity_granularity_* equal 1 on the systems tested, so
|
|
it's impossible to tell if they would need an adjustment
|
|
or not if their values were higher. */
|
|
}
|
|
if (test_bit(ACPI_BATTERY_QUIRK_DEGRADED_FULL_CHARGE, &battery->flags) &&
|
|
battery->capacity_now > battery->full_charge_capacity)
|
|
battery->capacity_now = battery->full_charge_capacity;
|
|
|
|
return result;
|
|
}
|
|
|
|
static int acpi_battery_get_info(struct acpi_battery *battery)
|
|
{
|
|
const int xinfo = test_bit(ACPI_BATTERY_XINFO_PRESENT, &battery->flags);
|
|
int use_bix;
|
|
int result = -ENODEV;
|
|
|
|
if (!acpi_battery_present(battery))
|
|
return 0;
|
|
|
|
|
|
for (use_bix = xinfo ? 1 : 0; use_bix >= 0; use_bix--) {
|
|
struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
|
|
acpi_status status = AE_ERROR;
|
|
|
|
mutex_lock(&battery->lock);
|
|
status = acpi_evaluate_object(battery->device->handle,
|
|
use_bix ? "_BIX":"_BIF",
|
|
NULL, &buffer);
|
|
mutex_unlock(&battery->lock);
|
|
|
|
if (ACPI_FAILURE(status)) {
|
|
ACPI_EXCEPTION((AE_INFO, status, "Evaluating %s",
|
|
use_bix ? "_BIX":"_BIF"));
|
|
} else {
|
|
result = extract_battery_info(use_bix,
|
|
battery,
|
|
&buffer);
|
|
|
|
kfree(buffer.pointer);
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (!result && !use_bix && xinfo)
|
|
pr_warn(FW_BUG "The _BIX method is broken, using _BIF.\n");
|
|
|
|
return result;
|
|
}
|
|
|
|
static int acpi_battery_get_state(struct acpi_battery *battery)
|
|
{
|
|
int result = 0;
|
|
acpi_status status = 0;
|
|
struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
|
|
|
|
if (!acpi_battery_present(battery))
|
|
return 0;
|
|
|
|
if (battery->update_time &&
|
|
time_before(jiffies, battery->update_time +
|
|
msecs_to_jiffies(cache_time)))
|
|
return 0;
|
|
|
|
mutex_lock(&battery->lock);
|
|
status = acpi_evaluate_object(battery->device->handle, "_BST",
|
|
NULL, &buffer);
|
|
mutex_unlock(&battery->lock);
|
|
|
|
if (ACPI_FAILURE(status)) {
|
|
ACPI_EXCEPTION((AE_INFO, status, "Evaluating _BST"));
|
|
return -ENODEV;
|
|
}
|
|
|
|
result = extract_package(battery, buffer.pointer,
|
|
state_offsets, ARRAY_SIZE(state_offsets));
|
|
battery->update_time = jiffies;
|
|
kfree(buffer.pointer);
|
|
|
|
/* For buggy DSDTs that report negative 16-bit values for either
|
|
* charging or discharging current and/or report 0 as 65536
|
|
* due to bad math.
|
|
*/
|
|
if (battery->power_unit == ACPI_BATTERY_POWER_UNIT_MA &&
|
|
battery->rate_now != ACPI_BATTERY_VALUE_UNKNOWN &&
|
|
(s16)(battery->rate_now) < 0) {
|
|
battery->rate_now = abs((s16)battery->rate_now);
|
|
pr_warn_once(FW_BUG "battery: (dis)charge rate invalid.\n");
|
|
}
|
|
|
|
if (test_bit(ACPI_BATTERY_QUIRK_PERCENTAGE_CAPACITY, &battery->flags)
|
|
&& battery->capacity_now >= 0 && battery->capacity_now <= 100)
|
|
battery->capacity_now = (battery->capacity_now *
|
|
battery->full_charge_capacity) / 100;
|
|
if (test_bit(ACPI_BATTERY_QUIRK_THINKPAD_MAH, &battery->flags) &&
|
|
battery->power_unit && battery->design_voltage) {
|
|
battery->capacity_now = battery->capacity_now *
|
|
10000 / battery->design_voltage;
|
|
}
|
|
if (test_bit(ACPI_BATTERY_QUIRK_DEGRADED_FULL_CHARGE, &battery->flags) &&
|
|
battery->capacity_now > battery->full_charge_capacity)
|
|
battery->capacity_now = battery->full_charge_capacity;
|
|
|
|
return result;
|
|
}
|
|
|
|
static int acpi_battery_set_alarm(struct acpi_battery *battery)
|
|
{
|
|
acpi_status status = 0;
|
|
|
|
if (!acpi_battery_present(battery) ||
|
|
!test_bit(ACPI_BATTERY_ALARM_PRESENT, &battery->flags))
|
|
return -ENODEV;
|
|
|
|
mutex_lock(&battery->lock);
|
|
status = acpi_execute_simple_method(battery->device->handle, "_BTP",
|
|
battery->alarm);
|
|
mutex_unlock(&battery->lock);
|
|
|
|
if (ACPI_FAILURE(status))
|
|
return -ENODEV;
|
|
|
|
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Alarm set to %d\n", battery->alarm));
|
|
return 0;
|
|
}
|
|
|
|
static int acpi_battery_init_alarm(struct acpi_battery *battery)
|
|
{
|
|
/* See if alarms are supported, and if so, set default */
|
|
if (!acpi_has_method(battery->device->handle, "_BTP")) {
|
|
clear_bit(ACPI_BATTERY_ALARM_PRESENT, &battery->flags);
|
|
return 0;
|
|
}
|
|
set_bit(ACPI_BATTERY_ALARM_PRESENT, &battery->flags);
|
|
if (!battery->alarm)
|
|
battery->alarm = battery->design_capacity_warning;
|
|
return acpi_battery_set_alarm(battery);
|
|
}
|
|
|
|
static ssize_t acpi_battery_alarm_show(struct device *dev,
|
|
struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev));
|
|
return sprintf(buf, "%d\n", battery->alarm * 1000);
|
|
}
|
|
|
|
static ssize_t acpi_battery_alarm_store(struct device *dev,
|
|
struct device_attribute *attr,
|
|
const char *buf, size_t count)
|
|
{
|
|
unsigned long x;
|
|
struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev));
|
|
if (sscanf(buf, "%lu\n", &x) == 1)
|
|
battery->alarm = x/1000;
|
|
if (acpi_battery_present(battery))
|
|
acpi_battery_set_alarm(battery);
|
|
return count;
|
|
}
|
|
|
|
static const struct device_attribute alarm_attr = {
|
|
.attr = {.name = "alarm", .mode = 0644},
|
|
.show = acpi_battery_alarm_show,
|
|
.store = acpi_battery_alarm_store,
|
|
};
|
|
|
|
/*
|
|
* The Battery Hooking API
|
|
*
|
|
* This API is used inside other drivers that need to expose
|
|
* platform-specific behaviour within the generic driver in a
|
|
* generic way.
|
|
*
|
|
*/
|
|
|
|
static LIST_HEAD(acpi_battery_list);
|
|
static LIST_HEAD(battery_hook_list);
|
|
static DEFINE_MUTEX(hook_mutex);
|
|
|
|
static void __battery_hook_unregister(struct acpi_battery_hook *hook, int lock)
|
|
{
|
|
struct acpi_battery *battery;
|
|
/*
|
|
* In order to remove a hook, we first need to
|
|
* de-register all the batteries that are registered.
|
|
*/
|
|
if (lock)
|
|
mutex_lock(&hook_mutex);
|
|
list_for_each_entry(battery, &acpi_battery_list, list) {
|
|
hook->remove_battery(battery->bat);
|
|
}
|
|
list_del(&hook->list);
|
|
if (lock)
|
|
mutex_unlock(&hook_mutex);
|
|
pr_info("extension unregistered: %s\n", hook->name);
|
|
}
|
|
|
|
void battery_hook_unregister(struct acpi_battery_hook *hook)
|
|
{
|
|
__battery_hook_unregister(hook, 1);
|
|
}
|
|
EXPORT_SYMBOL_GPL(battery_hook_unregister);
|
|
|
|
void battery_hook_register(struct acpi_battery_hook *hook)
|
|
{
|
|
struct acpi_battery *battery;
|
|
|
|
mutex_lock(&hook_mutex);
|
|
INIT_LIST_HEAD(&hook->list);
|
|
list_add(&hook->list, &battery_hook_list);
|
|
/*
|
|
* Now that the driver is registered, we need
|
|
* to notify the hook that a battery is available
|
|
* for each battery, so that the driver may add
|
|
* its attributes.
|
|
*/
|
|
list_for_each_entry(battery, &acpi_battery_list, list) {
|
|
if (hook->add_battery(battery->bat)) {
|
|
/*
|
|
* If a add-battery returns non-zero,
|
|
* the registration of the extension has failed,
|
|
* and we will not add it to the list of loaded
|
|
* hooks.
|
|
*/
|
|
pr_err("extension failed to load: %s", hook->name);
|
|
__battery_hook_unregister(hook, 0);
|
|
goto end;
|
|
}
|
|
}
|
|
pr_info("new extension: %s\n", hook->name);
|
|
end:
|
|
mutex_unlock(&hook_mutex);
|
|
}
|
|
EXPORT_SYMBOL_GPL(battery_hook_register);
|
|
|
|
/*
|
|
* This function gets called right after the battery sysfs
|
|
* attributes have been added, so that the drivers that
|
|
* define custom sysfs attributes can add their own.
|
|
*/
|
|
static void battery_hook_add_battery(struct acpi_battery *battery)
|
|
{
|
|
struct acpi_battery_hook *hook_node, *tmp;
|
|
|
|
mutex_lock(&hook_mutex);
|
|
INIT_LIST_HEAD(&battery->list);
|
|
list_add(&battery->list, &acpi_battery_list);
|
|
/*
|
|
* Since we added a new battery to the list, we need to
|
|
* iterate over the hooks and call add_battery for each
|
|
* hook that was registered. This usually happens
|
|
* when a battery gets hotplugged or initialized
|
|
* during the battery module initialization.
|
|
*/
|
|
list_for_each_entry_safe(hook_node, tmp, &battery_hook_list, list) {
|
|
if (hook_node->add_battery(battery->bat)) {
|
|
/*
|
|
* The notification of the extensions has failed, to
|
|
* prevent further errors we will unload the extension.
|
|
*/
|
|
pr_err("error in extension, unloading: %s",
|
|
hook_node->name);
|
|
__battery_hook_unregister(hook_node, 0);
|
|
}
|
|
}
|
|
mutex_unlock(&hook_mutex);
|
|
}
|
|
|
|
static void battery_hook_remove_battery(struct acpi_battery *battery)
|
|
{
|
|
struct acpi_battery_hook *hook;
|
|
|
|
mutex_lock(&hook_mutex);
|
|
/*
|
|
* Before removing the hook, we need to remove all
|
|
* custom attributes from the battery.
|
|
*/
|
|
list_for_each_entry(hook, &battery_hook_list, list) {
|
|
hook->remove_battery(battery->bat);
|
|
}
|
|
/* Then, just remove the battery from the list */
|
|
list_del(&battery->list);
|
|
mutex_unlock(&hook_mutex);
|
|
}
|
|
|
|
static void __exit battery_hook_exit(void)
|
|
{
|
|
struct acpi_battery_hook *hook;
|
|
struct acpi_battery_hook *ptr;
|
|
/*
|
|
* At this point, the acpi_bus_unregister_driver()
|
|
* has called remove for all batteries. We just
|
|
* need to remove the hooks.
|
|
*/
|
|
list_for_each_entry_safe(hook, ptr, &battery_hook_list, list) {
|
|
__battery_hook_unregister(hook, 1);
|
|
}
|
|
mutex_destroy(&hook_mutex);
|
|
}
|
|
|
|
static int sysfs_add_battery(struct acpi_battery *battery)
|
|
{
|
|
struct power_supply_config psy_cfg = { .drv_data = battery, };
|
|
|
|
if (battery->power_unit == ACPI_BATTERY_POWER_UNIT_MA) {
|
|
battery->bat_desc.properties = charge_battery_props;
|
|
battery->bat_desc.num_properties =
|
|
ARRAY_SIZE(charge_battery_props);
|
|
} else if (battery->full_charge_capacity == 0) {
|
|
battery->bat_desc.properties =
|
|
energy_battery_full_cap_broken_props;
|
|
battery->bat_desc.num_properties =
|
|
ARRAY_SIZE(energy_battery_full_cap_broken_props);
|
|
} else {
|
|
battery->bat_desc.properties = energy_battery_props;
|
|
battery->bat_desc.num_properties =
|
|
ARRAY_SIZE(energy_battery_props);
|
|
}
|
|
|
|
battery->bat_desc.name = acpi_device_bid(battery->device);
|
|
battery->bat_desc.type = POWER_SUPPLY_TYPE_BATTERY;
|
|
battery->bat_desc.get_property = acpi_battery_get_property;
|
|
|
|
battery->bat = power_supply_register_no_ws(&battery->device->dev,
|
|
&battery->bat_desc, &psy_cfg);
|
|
|
|
if (IS_ERR(battery->bat)) {
|
|
int result = PTR_ERR(battery->bat);
|
|
|
|
battery->bat = NULL;
|
|
return result;
|
|
}
|
|
battery_hook_add_battery(battery);
|
|
return device_create_file(&battery->bat->dev, &alarm_attr);
|
|
}
|
|
|
|
static void sysfs_remove_battery(struct acpi_battery *battery)
|
|
{
|
|
mutex_lock(&battery->sysfs_lock);
|
|
if (!battery->bat) {
|
|
mutex_unlock(&battery->sysfs_lock);
|
|
return;
|
|
}
|
|
battery_hook_remove_battery(battery);
|
|
device_remove_file(&battery->bat->dev, &alarm_attr);
|
|
power_supply_unregister(battery->bat);
|
|
battery->bat = NULL;
|
|
mutex_unlock(&battery->sysfs_lock);
|
|
}
|
|
|
|
static void find_battery(const struct dmi_header *dm, void *private)
|
|
{
|
|
struct acpi_battery *battery = (struct acpi_battery *)private;
|
|
/* Note: the hardcoded offsets below have been extracted from
|
|
the source code of dmidecode. */
|
|
if (dm->type == DMI_ENTRY_PORTABLE_BATTERY && dm->length >= 8) {
|
|
const u8 *dmi_data = (const u8 *)(dm + 1);
|
|
int dmi_capacity = get_unaligned((const u16 *)(dmi_data + 6));
|
|
if (dm->length >= 18)
|
|
dmi_capacity *= dmi_data[17];
|
|
if (battery->design_capacity * battery->design_voltage / 1000
|
|
!= dmi_capacity &&
|
|
battery->design_capacity * 10 == dmi_capacity)
|
|
set_bit(ACPI_BATTERY_QUIRK_THINKPAD_MAH,
|
|
&battery->flags);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* According to the ACPI spec, some kinds of primary batteries can
|
|
* report percentage battery remaining capacity directly to OS.
|
|
* In this case, it reports the Last Full Charged Capacity == 100
|
|
* and BatteryPresentRate == 0xFFFFFFFF.
|
|
*
|
|
* Now we found some battery reports percentage remaining capacity
|
|
* even if it's rechargeable.
|
|
* https://bugzilla.kernel.org/show_bug.cgi?id=15979
|
|
*
|
|
* Handle this correctly so that they won't break userspace.
|
|
*/
|
|
static void acpi_battery_quirks(struct acpi_battery *battery)
|
|
{
|
|
if (test_bit(ACPI_BATTERY_QUIRK_PERCENTAGE_CAPACITY, &battery->flags))
|
|
return;
|
|
|
|
if (battery->full_charge_capacity == 100 &&
|
|
battery->rate_now == ACPI_BATTERY_VALUE_UNKNOWN &&
|
|
battery->capacity_now >= 0 && battery->capacity_now <= 100) {
|
|
set_bit(ACPI_BATTERY_QUIRK_PERCENTAGE_CAPACITY, &battery->flags);
|
|
battery->full_charge_capacity = battery->design_capacity;
|
|
battery->capacity_now = (battery->capacity_now *
|
|
battery->full_charge_capacity) / 100;
|
|
}
|
|
|
|
if (test_bit(ACPI_BATTERY_QUIRK_THINKPAD_MAH, &battery->flags))
|
|
return;
|
|
|
|
if (battery->power_unit && dmi_name_in_vendors("LENOVO")) {
|
|
const char *s;
|
|
s = dmi_get_system_info(DMI_PRODUCT_VERSION);
|
|
if (s && !strncasecmp(s, "ThinkPad", 8)) {
|
|
dmi_walk(find_battery, battery);
|
|
if (test_bit(ACPI_BATTERY_QUIRK_THINKPAD_MAH,
|
|
&battery->flags) &&
|
|
battery->design_voltage) {
|
|
battery->design_capacity =
|
|
battery->design_capacity *
|
|
10000 / battery->design_voltage;
|
|
battery->full_charge_capacity =
|
|
battery->full_charge_capacity *
|
|
10000 / battery->design_voltage;
|
|
battery->design_capacity_warning =
|
|
battery->design_capacity_warning *
|
|
10000 / battery->design_voltage;
|
|
battery->capacity_now = battery->capacity_now *
|
|
10000 / battery->design_voltage;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (test_bit(ACPI_BATTERY_QUIRK_DEGRADED_FULL_CHARGE, &battery->flags))
|
|
return;
|
|
|
|
if (acpi_battery_is_degraded(battery) &&
|
|
battery->capacity_now > battery->full_charge_capacity) {
|
|
set_bit(ACPI_BATTERY_QUIRK_DEGRADED_FULL_CHARGE, &battery->flags);
|
|
battery->capacity_now = battery->full_charge_capacity;
|
|
}
|
|
}
|
|
|
|
static int acpi_battery_update(struct acpi_battery *battery, bool resume)
|
|
{
|
|
int result = acpi_battery_get_status(battery);
|
|
|
|
if (result)
|
|
return result;
|
|
|
|
if (!acpi_battery_present(battery)) {
|
|
sysfs_remove_battery(battery);
|
|
battery->update_time = 0;
|
|
return 0;
|
|
}
|
|
|
|
if (resume)
|
|
return 0;
|
|
|
|
if (!battery->update_time) {
|
|
result = acpi_battery_get_info(battery);
|
|
if (result)
|
|
return result;
|
|
acpi_battery_init_alarm(battery);
|
|
}
|
|
|
|
result = acpi_battery_get_state(battery);
|
|
if (result)
|
|
return result;
|
|
acpi_battery_quirks(battery);
|
|
|
|
if (!battery->bat) {
|
|
result = sysfs_add_battery(battery);
|
|
if (result)
|
|
return result;
|
|
}
|
|
|
|
/*
|
|
* Wakeup the system if battery is critical low
|
|
* or lower than the alarm level
|
|
*/
|
|
if ((battery->state & ACPI_BATTERY_STATE_CRITICAL) ||
|
|
(test_bit(ACPI_BATTERY_ALARM_PRESENT, &battery->flags) &&
|
|
(battery->capacity_now <= battery->alarm)))
|
|
acpi_pm_wakeup_event(&battery->device->dev);
|
|
|
|
return result;
|
|
}
|
|
|
|
static void acpi_battery_refresh(struct acpi_battery *battery)
|
|
{
|
|
int power_unit;
|
|
|
|
if (!battery->bat)
|
|
return;
|
|
|
|
power_unit = battery->power_unit;
|
|
|
|
acpi_battery_get_info(battery);
|
|
|
|
if (power_unit == battery->power_unit)
|
|
return;
|
|
|
|
/* The battery has changed its reporting units. */
|
|
sysfs_remove_battery(battery);
|
|
sysfs_add_battery(battery);
|
|
}
|
|
|
|
/* --------------------------------------------------------------------------
|
|
FS Interface (/proc)
|
|
-------------------------------------------------------------------------- */
|
|
|
|
#ifdef CONFIG_ACPI_PROCFS_POWER
|
|
static struct proc_dir_entry *acpi_battery_dir;
|
|
|
|
static const char *acpi_battery_units(const struct acpi_battery *battery)
|
|
{
|
|
return (battery->power_unit == ACPI_BATTERY_POWER_UNIT_MA) ?
|
|
"mA" : "mW";
|
|
}
|
|
|
|
static int acpi_battery_info_proc_show(struct seq_file *seq, void *offset)
|
|
{
|
|
struct acpi_battery *battery = seq->private;
|
|
int result = acpi_battery_update(battery, false);
|
|
|
|
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, "cycle count: %i\n", battery->cycle_count);
|
|
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_state_proc_show(struct seq_file *seq, void *offset)
|
|
{
|
|
struct acpi_battery *battery = seq->private;
|
|
int result = acpi_battery_update(battery, false);
|
|
|
|
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->rate_now == ACPI_BATTERY_VALUE_UNKNOWN)
|
|
seq_printf(seq, "present rate: unknown\n");
|
|
else
|
|
seq_printf(seq, "present rate: %d %s\n",
|
|
battery->rate_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_alarm_proc_show(struct seq_file *seq, void *offset)
|
|
{
|
|
struct acpi_battery *battery = seq->private;
|
|
int result = acpi_battery_update(battery, false);
|
|
|
|
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, "%u %sh\n", battery->alarm,
|
|
acpi_battery_units(battery));
|
|
} else {
|
|
seq_printf(seq, "unsupported\n");
|
|
}
|
|
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';
|
|
if (kstrtoint(alarm_string, 0, &battery->alarm)) {
|
|
result = -EINVAL;
|
|
goto end;
|
|
}
|
|
result = acpi_battery_set_alarm(battery);
|
|
end:
|
|
if (result)
|
|
return result;
|
|
return count;
|
|
}
|
|
|
|
static int acpi_battery_alarm_proc_open(struct inode *inode, struct file *file)
|
|
{
|
|
return single_open(file, acpi_battery_alarm_proc_show, PDE_DATA(inode));
|
|
}
|
|
|
|
static const struct file_operations acpi_battery_alarm_fops = {
|
|
.owner = THIS_MODULE,
|
|
.open = acpi_battery_alarm_proc_open,
|
|
.read = seq_read,
|
|
.write = acpi_battery_write_alarm,
|
|
.llseek = seq_lseek,
|
|
.release = single_release,
|
|
};
|
|
|
|
static int acpi_battery_add_fs(struct acpi_device *device)
|
|
{
|
|
pr_warning(PREFIX "Deprecated procfs I/F for battery is loaded, please retry with CONFIG_ACPI_PROCFS_POWER cleared\n");
|
|
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;
|
|
}
|
|
|
|
if (!proc_create_single_data("info", S_IRUGO, acpi_device_dir(device),
|
|
acpi_battery_info_proc_show, acpi_driver_data(device)))
|
|
return -ENODEV;
|
|
if (!proc_create_single_data("state", S_IRUGO, acpi_device_dir(device),
|
|
acpi_battery_state_proc_show, acpi_driver_data(device)))
|
|
return -ENODEV;
|
|
if (!proc_create_data("alarm", S_IFREG | S_IRUGO | S_IWUSR,
|
|
acpi_device_dir(device), &acpi_battery_alarm_fops,
|
|
acpi_driver_data(device)))
|
|
return -ENODEV;
|
|
return 0;
|
|
}
|
|
|
|
static void acpi_battery_remove_fs(struct acpi_device *device)
|
|
{
|
|
if (!acpi_device_dir(device))
|
|
return;
|
|
remove_proc_subtree(acpi_device_bid(device), acpi_battery_dir);
|
|
acpi_device_dir(device) = NULL;
|
|
}
|
|
|
|
#endif
|
|
|
|
/* --------------------------------------------------------------------------
|
|
Driver Interface
|
|
-------------------------------------------------------------------------- */
|
|
|
|
static void acpi_battery_notify(struct acpi_device *device, u32 event)
|
|
{
|
|
struct acpi_battery *battery = acpi_driver_data(device);
|
|
struct power_supply *old;
|
|
|
|
if (!battery)
|
|
return;
|
|
old = battery->bat;
|
|
/*
|
|
* On Acer Aspire V5-573G notifications are sometimes triggered too
|
|
* early. For example, when AC is unplugged and notification is
|
|
* triggered, battery state is still reported as "Full", and changes to
|
|
* "Discharging" only after short delay, without any notification.
|
|
*/
|
|
if (battery_notification_delay_ms > 0)
|
|
msleep(battery_notification_delay_ms);
|
|
if (event == ACPI_BATTERY_NOTIFY_INFO)
|
|
acpi_battery_refresh(battery);
|
|
acpi_battery_update(battery, false);
|
|
acpi_bus_generate_netlink_event(device->pnp.device_class,
|
|
dev_name(&device->dev), event,
|
|
acpi_battery_present(battery));
|
|
acpi_notifier_call_chain(device, event, acpi_battery_present(battery));
|
|
/* acpi_battery_update could remove power_supply object */
|
|
if (old && battery->bat)
|
|
power_supply_changed(battery->bat);
|
|
}
|
|
|
|
static int battery_notify(struct notifier_block *nb,
|
|
unsigned long mode, void *_unused)
|
|
{
|
|
struct acpi_battery *battery = container_of(nb, struct acpi_battery,
|
|
pm_nb);
|
|
int result;
|
|
|
|
switch (mode) {
|
|
case PM_POST_HIBERNATION:
|
|
case PM_POST_SUSPEND:
|
|
if (!acpi_battery_present(battery))
|
|
return 0;
|
|
|
|
if (battery->bat) {
|
|
acpi_battery_refresh(battery);
|
|
} else {
|
|
result = acpi_battery_get_info(battery);
|
|
if (result)
|
|
return result;
|
|
|
|
result = sysfs_add_battery(battery);
|
|
if (result)
|
|
return result;
|
|
}
|
|
|
|
acpi_battery_init_alarm(battery);
|
|
acpi_battery_get_state(battery);
|
|
break;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int __init
|
|
battery_bix_broken_package_quirk(const struct dmi_system_id *d)
|
|
{
|
|
battery_bix_broken_package = 1;
|
|
return 0;
|
|
}
|
|
|
|
static int __init
|
|
battery_notification_delay_quirk(const struct dmi_system_id *d)
|
|
{
|
|
battery_notification_delay_ms = 1000;
|
|
return 0;
|
|
}
|
|
|
|
static int __init
|
|
battery_ac_is_broken_quirk(const struct dmi_system_id *d)
|
|
{
|
|
battery_ac_is_broken = 1;
|
|
return 0;
|
|
}
|
|
|
|
static int __init
|
|
battery_do_not_check_pmic_quirk(const struct dmi_system_id *d)
|
|
{
|
|
battery_check_pmic = 0;
|
|
return 0;
|
|
}
|
|
|
|
static const struct dmi_system_id bat_dmi_table[] __initconst = {
|
|
{
|
|
/* NEC LZ750/LS */
|
|
.callback = battery_bix_broken_package_quirk,
|
|
.matches = {
|
|
DMI_MATCH(DMI_SYS_VENDOR, "NEC"),
|
|
DMI_MATCH(DMI_PRODUCT_NAME, "PC-LZ750LS"),
|
|
},
|
|
},
|
|
{
|
|
/* Acer Aspire V5-573G */
|
|
.callback = battery_notification_delay_quirk,
|
|
.matches = {
|
|
DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
|
|
DMI_MATCH(DMI_PRODUCT_NAME, "Aspire V5-573G"),
|
|
},
|
|
},
|
|
{
|
|
/* Point of View mobii wintab p800w */
|
|
.callback = battery_ac_is_broken_quirk,
|
|
.matches = {
|
|
DMI_MATCH(DMI_BOARD_VENDOR, "AMI Corporation"),
|
|
DMI_MATCH(DMI_BOARD_NAME, "Aptio CRB"),
|
|
DMI_MATCH(DMI_BIOS_VERSION, "3BAIR1013"),
|
|
/* Above matches are too generic, add bios-date match */
|
|
DMI_MATCH(DMI_BIOS_DATE, "08/22/2014"),
|
|
},
|
|
},
|
|
{
|
|
/* ECS EF20EA */
|
|
.callback = battery_do_not_check_pmic_quirk,
|
|
.matches = {
|
|
DMI_MATCH(DMI_PRODUCT_NAME, "EF20EA"),
|
|
},
|
|
},
|
|
{
|
|
/* Lenovo Ideapad Miix 320 */
|
|
.callback = battery_do_not_check_pmic_quirk,
|
|
.matches = {
|
|
DMI_EXACT_MATCH(DMI_SYS_VENDOR, "LENOVO"),
|
|
DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "80XF"),
|
|
DMI_EXACT_MATCH(DMI_PRODUCT_VERSION, "Lenovo MIIX 320-10ICR"),
|
|
},
|
|
},
|
|
{},
|
|
};
|
|
|
|
/*
|
|
* Some machines'(E,G Lenovo Z480) ECs are not stable
|
|
* during boot up and this causes battery driver fails to be
|
|
* probed due to failure of getting battery information
|
|
* from EC sometimes. After several retries, the operation
|
|
* may work. So add retry code here and 20ms sleep between
|
|
* every retries.
|
|
*/
|
|
static int acpi_battery_update_retry(struct acpi_battery *battery)
|
|
{
|
|
int retry, ret;
|
|
|
|
for (retry = 5; retry; retry--) {
|
|
ret = acpi_battery_update(battery, false);
|
|
if (!ret)
|
|
break;
|
|
|
|
msleep(20);
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
static int acpi_battery_add(struct acpi_device *device)
|
|
{
|
|
int result = 0;
|
|
struct acpi_battery *battery = NULL;
|
|
|
|
if (!device)
|
|
return -EINVAL;
|
|
|
|
if (device->dep_unmet)
|
|
return -EPROBE_DEFER;
|
|
|
|
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);
|
|
mutex_init(&battery->sysfs_lock);
|
|
if (acpi_has_method(battery->device->handle, "_BIX"))
|
|
set_bit(ACPI_BATTERY_XINFO_PRESENT, &battery->flags);
|
|
|
|
result = acpi_battery_update_retry(battery);
|
|
if (result)
|
|
goto fail;
|
|
|
|
#ifdef CONFIG_ACPI_PROCFS_POWER
|
|
result = acpi_battery_add_fs(device);
|
|
if (result) {
|
|
acpi_battery_remove_fs(device);
|
|
goto fail;
|
|
}
|
|
#endif
|
|
|
|
pr_info(PREFIX "%s Slot [%s] (battery %s)\n",
|
|
ACPI_BATTERY_DEVICE_NAME, acpi_device_bid(device),
|
|
device->status.battery_present ? "present" : "absent");
|
|
|
|
battery->pm_nb.notifier_call = battery_notify;
|
|
register_pm_notifier(&battery->pm_nb);
|
|
|
|
device_init_wakeup(&device->dev, 1);
|
|
|
|
return result;
|
|
|
|
fail:
|
|
sysfs_remove_battery(battery);
|
|
mutex_destroy(&battery->lock);
|
|
mutex_destroy(&battery->sysfs_lock);
|
|
kfree(battery);
|
|
return result;
|
|
}
|
|
|
|
static int acpi_battery_remove(struct acpi_device *device)
|
|
{
|
|
struct acpi_battery *battery = NULL;
|
|
|
|
if (!device || !acpi_driver_data(device))
|
|
return -EINVAL;
|
|
device_init_wakeup(&device->dev, 0);
|
|
battery = acpi_driver_data(device);
|
|
unregister_pm_notifier(&battery->pm_nb);
|
|
#ifdef CONFIG_ACPI_PROCFS_POWER
|
|
acpi_battery_remove_fs(device);
|
|
#endif
|
|
sysfs_remove_battery(battery);
|
|
mutex_destroy(&battery->lock);
|
|
mutex_destroy(&battery->sysfs_lock);
|
|
kfree(battery);
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_PM_SLEEP
|
|
/* this is needed to learn about changes made in suspended state */
|
|
static int acpi_battery_resume(struct device *dev)
|
|
{
|
|
struct acpi_battery *battery;
|
|
|
|
if (!dev)
|
|
return -EINVAL;
|
|
|
|
battery = acpi_driver_data(to_acpi_device(dev));
|
|
if (!battery)
|
|
return -EINVAL;
|
|
|
|
battery->update_time = 0;
|
|
acpi_battery_update(battery, true);
|
|
return 0;
|
|
}
|
|
#else
|
|
#define acpi_battery_resume NULL
|
|
#endif
|
|
|
|
static SIMPLE_DEV_PM_OPS(acpi_battery_pm, NULL, acpi_battery_resume);
|
|
|
|
static struct acpi_driver acpi_battery_driver = {
|
|
.name = "battery",
|
|
.class = ACPI_BATTERY_CLASS,
|
|
.ids = battery_device_ids,
|
|
.flags = ACPI_DRIVER_ALL_NOTIFY_EVENTS,
|
|
.ops = {
|
|
.add = acpi_battery_add,
|
|
.remove = acpi_battery_remove,
|
|
.notify = acpi_battery_notify,
|
|
},
|
|
.drv.pm = &acpi_battery_pm,
|
|
};
|
|
|
|
static void __init acpi_battery_init_async(void *unused, async_cookie_t cookie)
|
|
{
|
|
unsigned int i;
|
|
int result;
|
|
|
|
dmi_check_system(bat_dmi_table);
|
|
|
|
if (battery_check_pmic) {
|
|
for (i = 0; i < ARRAY_SIZE(acpi_battery_blacklist); i++)
|
|
if (acpi_dev_present(acpi_battery_blacklist[i], "1", -1)) {
|
|
pr_info(PREFIX ACPI_BATTERY_DEVICE_NAME
|
|
": found native %s PMIC, not loading\n",
|
|
acpi_battery_blacklist[i]);
|
|
return;
|
|
}
|
|
}
|
|
|
|
#ifdef CONFIG_ACPI_PROCFS_POWER
|
|
acpi_battery_dir = acpi_lock_battery_dir();
|
|
if (!acpi_battery_dir)
|
|
return;
|
|
#endif
|
|
result = acpi_bus_register_driver(&acpi_battery_driver);
|
|
#ifdef CONFIG_ACPI_PROCFS_POWER
|
|
if (result < 0)
|
|
acpi_unlock_battery_dir(acpi_battery_dir);
|
|
#endif
|
|
battery_driver_registered = (result == 0);
|
|
}
|
|
|
|
static int __init acpi_battery_init(void)
|
|
{
|
|
if (acpi_disabled)
|
|
return -ENODEV;
|
|
|
|
async_cookie = async_schedule(acpi_battery_init_async, NULL);
|
|
return 0;
|
|
}
|
|
|
|
static void __exit acpi_battery_exit(void)
|
|
{
|
|
async_synchronize_cookie(async_cookie + 1);
|
|
if (battery_driver_registered) {
|
|
acpi_bus_unregister_driver(&acpi_battery_driver);
|
|
battery_hook_exit();
|
|
}
|
|
#ifdef CONFIG_ACPI_PROCFS_POWER
|
|
if (acpi_battery_dir)
|
|
acpi_unlock_battery_dir(acpi_battery_dir);
|
|
#endif
|
|
}
|
|
|
|
module_init(acpi_battery_init);
|
|
module_exit(acpi_battery_exit);
|