mirror of https://gitee.com/openkylin/linux.git
1097 lines
31 KiB
C
1097 lines
31 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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#include <linux/async.h>
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#include <linux/dmi.h>
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#include <linux/slab.h>
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#include <linux/suspend.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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#include <linux/power_supply.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_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 ACPI_BATTERY_NOTIFY_THRESHOLD 0x82
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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 _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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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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};
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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 acpi_device *device;
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struct notifier_block pm_nb;
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unsigned long update_time;
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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) 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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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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/* either charging or discharging */
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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 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 & 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 (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_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_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_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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#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 == ACPI_BATTERY_POWER_UNIT_MA) ?
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"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, 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 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 struct acpi_offsets extended_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, 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},
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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(u64));
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ptr[sizeof(u64)] = 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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char *name = test_bit(ACPI_BATTERY_XINFO_PRESENT, &battery->flags)?
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"_BIX" : "_BIF";
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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, name,
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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 %s", name));
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return -ENODEV;
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}
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if (test_bit(ACPI_BATTERY_XINFO_PRESENT, &battery->flags))
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result = extract_package(battery, buffer.pointer,
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extended_info_offsets,
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ARRAY_SIZE(extended_info_offsets));
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else
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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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if (test_bit(ACPI_BATTERY_QUIRK_PERCENTAGE_CAPACITY, &battery->flags))
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battery->full_charge_capacity = battery->design_capacity;
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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;
|
|
}
|
|
|
|
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);
|
|
printk_once(KERN_WARNING 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;
|
|
return result;
|
|
}
|
|
|
|
static int acpi_battery_set_alarm(struct acpi_battery *battery)
|
|
{
|
|
acpi_status status = 0;
|
|
union acpi_object arg0 = { .type = ACPI_TYPE_INTEGER };
|
|
struct acpi_object_list arg_list = { 1, &arg0 };
|
|
|
|
if (!acpi_battery_present(battery) ||
|
|
!test_bit(ACPI_BATTERY_ALARM_PRESENT, &battery->flags))
|
|
return -ENODEV;
|
|
|
|
arg0.integer.value = battery->alarm;
|
|
|
|
mutex_lock(&battery->lock);
|
|
status = acpi_evaluate_object(battery->device->handle, "_BTP",
|
|
&arg_list, NULL);
|
|
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)
|
|
{
|
|
acpi_status status = AE_OK;
|
|
acpi_handle handle = NULL;
|
|
|
|
/* See if alarms are supported, and if so, set default */
|
|
status = acpi_get_handle(battery->device->handle, "_BTP", &handle);
|
|
if (ACPI_FAILURE(status)) {
|
|
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, "%ld\n", &x) == 1)
|
|
battery->alarm = x/1000;
|
|
if (acpi_battery_present(battery))
|
|
acpi_battery_set_alarm(battery);
|
|
return count;
|
|
}
|
|
|
|
static struct device_attribute alarm_attr = {
|
|
.attr = {.name = "alarm", .mode = 0644},
|
|
.show = acpi_battery_alarm_show,
|
|
.store = acpi_battery_alarm_store,
|
|
};
|
|
|
|
static int sysfs_add_battery(struct acpi_battery *battery)
|
|
{
|
|
int result;
|
|
|
|
if (battery->power_unit == ACPI_BATTERY_POWER_UNIT_MA) {
|
|
battery->bat.properties = charge_battery_props;
|
|
battery->bat.num_properties =
|
|
ARRAY_SIZE(charge_battery_props);
|
|
} else {
|
|
battery->bat.properties = energy_battery_props;
|
|
battery->bat.num_properties =
|
|
ARRAY_SIZE(energy_battery_props);
|
|
}
|
|
|
|
battery->bat.name = acpi_device_bid(battery->device);
|
|
battery->bat.type = POWER_SUPPLY_TYPE_BATTERY;
|
|
battery->bat.get_property = acpi_battery_get_property;
|
|
|
|
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)
|
|
{
|
|
mutex_lock(&battery->sysfs_lock);
|
|
if (!battery->bat.dev) {
|
|
mutex_unlock(&battery->sysfs_lock);
|
|
return;
|
|
}
|
|
|
|
device_remove_file(battery->bat.dev, &alarm_attr);
|
|
power_supply_unregister(&battery->bat);
|
|
battery->bat.dev = NULL;
|
|
mutex_unlock(&battery->sysfs_lock);
|
|
}
|
|
|
|
/*
|
|
* 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;
|
|
}
|
|
}
|
|
|
|
static int acpi_battery_update(struct acpi_battery *battery)
|
|
{
|
|
int result, old_present = acpi_battery_present(battery);
|
|
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 (!battery->update_time ||
|
|
old_present != acpi_battery_present(battery)) {
|
|
result = acpi_battery_get_info(battery);
|
|
if (result)
|
|
return result;
|
|
acpi_battery_init_alarm(battery);
|
|
}
|
|
if (!battery->bat.dev) {
|
|
result = sysfs_add_battery(battery);
|
|
if (result)
|
|
return result;
|
|
}
|
|
result = acpi_battery_get_state(battery);
|
|
acpi_battery_quirks(battery);
|
|
return result;
|
|
}
|
|
|
|
static void acpi_battery_refresh(struct acpi_battery *battery)
|
|
{
|
|
if (!battery->bat.dev)
|
|
return;
|
|
|
|
acpi_battery_get_info(battery);
|
|
/* The battery may have 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 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, "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_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->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_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 const struct battery_file {
|
|
struct file_operations ops;
|
|
umode_t mode;
|
|
const 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;
|
|
|
|
printk(KERN_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;
|
|
}
|
|
|
|
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(struct acpi_device *device, u32 event)
|
|
{
|
|
struct acpi_battery *battery = acpi_driver_data(device);
|
|
struct device *old;
|
|
|
|
if (!battery)
|
|
return;
|
|
old = battery->bat.dev;
|
|
if (event == ACPI_BATTERY_NOTIFY_INFO)
|
|
acpi_battery_refresh(battery);
|
|
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));
|
|
/* acpi_battery_update could remove power_supply object */
|
|
if (old && battery->bat.dev)
|
|
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);
|
|
switch (mode) {
|
|
case PM_POST_HIBERNATION:
|
|
case PM_POST_SUSPEND:
|
|
if (battery->bat.dev) {
|
|
sysfs_remove_battery(battery);
|
|
sysfs_add_battery(battery);
|
|
}
|
|
break;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int acpi_battery_add(struct acpi_device *device)
|
|
{
|
|
int result = 0;
|
|
struct acpi_battery *battery = NULL;
|
|
acpi_handle handle;
|
|
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);
|
|
mutex_init(&battery->sysfs_lock);
|
|
if (ACPI_SUCCESS(acpi_get_handle(battery->device->handle,
|
|
"_BIX", &handle)))
|
|
set_bit(ACPI_BATTERY_XINFO_PRESENT, &battery->flags);
|
|
result = acpi_battery_update(battery);
|
|
if (result)
|
|
goto fail;
|
|
#ifdef CONFIG_ACPI_PROCFS_POWER
|
|
result = acpi_battery_add_fs(device);
|
|
#endif
|
|
if (result) {
|
|
#ifdef CONFIG_ACPI_PROCFS_POWER
|
|
acpi_battery_remove_fs(device);
|
|
#endif
|
|
goto fail;
|
|
}
|
|
|
|
printk(KERN_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);
|
|
|
|
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, int type)
|
|
{
|
|
struct acpi_battery *battery = NULL;
|
|
|
|
if (!device || !acpi_driver_data(device))
|
|
return -EINVAL;
|
|
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;
|
|
}
|
|
|
|
/* 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,
|
|
.flags = ACPI_DRIVER_ALL_NOTIFY_EVENTS,
|
|
.ops = {
|
|
.add = acpi_battery_add,
|
|
.resume = acpi_battery_resume,
|
|
.remove = acpi_battery_remove,
|
|
.notify = acpi_battery_notify,
|
|
},
|
|
};
|
|
|
|
static void __init acpi_battery_init_async(void *unused, async_cookie_t cookie)
|
|
{
|
|
if (acpi_disabled)
|
|
return;
|
|
#ifdef CONFIG_ACPI_PROCFS_POWER
|
|
acpi_battery_dir = acpi_lock_battery_dir();
|
|
if (!acpi_battery_dir)
|
|
return;
|
|
#endif
|
|
if (acpi_bus_register_driver(&acpi_battery_driver) < 0) {
|
|
#ifdef CONFIG_ACPI_PROCFS_POWER
|
|
acpi_unlock_battery_dir(acpi_battery_dir);
|
|
#endif
|
|
return;
|
|
}
|
|
return;
|
|
}
|
|
|
|
static int __init acpi_battery_init(void)
|
|
{
|
|
async_schedule(acpi_battery_init_async, NULL);
|
|
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);
|