mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-24 02:35:16 +07:00
ca1721c5be
On Apple machines, plugging-in or unplugging the power triggers a GPE
for the EC. Since these machines expose an SBS device, this GPE ends
up triggering the acpi_sbs_callback(). This in turn tries to get the
status of the SBS charger. However, on MBP13,* and MBP14,* machines,
performing the smbus-read operation to get the charger's status triggers
the EC's GPE again. The result is an endless re-triggering and handling
of that GPE, consuming significant CPU resources (> 50% in irq).
In the end this is quite similar to commit 3031cddea6 (ACPI / SBS:
Don't assume the existence of an SBS charger), except that on the above
machines a status of all 1's is returned. And like there, we just want
ignore the charger here.
Link: https://bugzilla.kernel.org/show_bug.cgi?id=198169
Signed-off-by: Ronald Tschalär <ronald@innovation.ch>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
753 lines
20 KiB
C
753 lines
20 KiB
C
/*
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* sbs.c - ACPI Smart Battery System 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) 2005-2007 Vladimir Lebedev <vladimir.p.lebedev@intel.com>
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* Copyright (c) 2005 Rich Townsend <rhdt@bartol.udel.edu>
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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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#include <linux/init.h>
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#include <linux/slab.h>
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#include <linux/module.h>
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#include <linux/moduleparam.h>
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#include <linux/kernel.h>
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#include <linux/acpi.h>
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#include <linux/timer.h>
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#include <linux/jiffies.h>
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#include <linux/delay.h>
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#include <linux/power_supply.h>
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#include <linux/platform_data/x86/apple.h>
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#include <acpi/battery.h>
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#include "sbshc.h"
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#define PREFIX "ACPI: "
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#define ACPI_SBS_CLASS "sbs"
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#define ACPI_AC_CLASS "ac_adapter"
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#define ACPI_SBS_DEVICE_NAME "Smart Battery System"
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#define ACPI_SBS_FILE_INFO "info"
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#define ACPI_SBS_FILE_STATE "state"
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#define ACPI_SBS_FILE_ALARM "alarm"
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#define ACPI_BATTERY_DIR_NAME "BAT%i"
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#define ACPI_AC_DIR_NAME "AC0"
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#define ACPI_SBS_NOTIFY_STATUS 0x80
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#define ACPI_SBS_NOTIFY_INFO 0x81
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MODULE_AUTHOR("Alexey Starikovskiy <astarikovskiy@suse.de>");
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MODULE_DESCRIPTION("Smart Battery System ACPI interface 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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#define MAX_SBS_BAT 4
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#define ACPI_SBS_BLOCK_MAX 32
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static const struct acpi_device_id sbs_device_ids[] = {
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{"ACPI0002", 0},
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{"", 0},
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};
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MODULE_DEVICE_TABLE(acpi, sbs_device_ids);
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struct acpi_battery {
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struct power_supply *bat;
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struct power_supply_desc bat_desc;
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struct acpi_sbs *sbs;
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unsigned long update_time;
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char name[8];
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char manufacturer_name[ACPI_SBS_BLOCK_MAX];
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char device_name[ACPI_SBS_BLOCK_MAX];
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char device_chemistry[ACPI_SBS_BLOCK_MAX];
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u16 alarm_capacity;
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u16 full_charge_capacity;
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u16 design_capacity;
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u16 design_voltage;
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u16 serial_number;
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u16 cycle_count;
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u16 temp_now;
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u16 voltage_now;
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s16 rate_now;
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s16 rate_avg;
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u16 capacity_now;
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u16 state_of_charge;
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u16 state;
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u16 mode;
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u16 spec;
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u8 id;
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u8 present:1;
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u8 have_sysfs_alarm:1;
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};
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#define to_acpi_battery(x) power_supply_get_drvdata(x)
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struct acpi_sbs {
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struct power_supply *charger;
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struct acpi_device *device;
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struct acpi_smb_hc *hc;
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struct mutex lock;
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struct acpi_battery battery[MAX_SBS_BAT];
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u8 batteries_supported:4;
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u8 manager_present:1;
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u8 charger_present:1;
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u8 charger_exists:1;
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};
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#define to_acpi_sbs(x) power_supply_get_drvdata(x)
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static int acpi_sbs_remove(struct acpi_device *device);
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static int acpi_battery_get_state(struct acpi_battery *battery);
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static inline int battery_scale(int log)
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{
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int scale = 1;
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while (log--)
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scale *= 10;
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return scale;
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}
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static inline int acpi_battery_vscale(struct acpi_battery *battery)
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{
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return battery_scale((battery->spec & 0x0f00) >> 8);
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}
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static inline int acpi_battery_ipscale(struct acpi_battery *battery)
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{
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return battery_scale((battery->spec & 0xf000) >> 12);
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}
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static inline int acpi_battery_mode(struct acpi_battery *battery)
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{
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return (battery->mode & 0x8000);
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}
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static inline int acpi_battery_scale(struct acpi_battery *battery)
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{
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return (acpi_battery_mode(battery) ? 10 : 1) *
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acpi_battery_ipscale(battery);
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}
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static int sbs_get_ac_property(struct power_supply *psy,
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enum power_supply_property psp,
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union power_supply_propval *val)
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{
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struct acpi_sbs *sbs = to_acpi_sbs(psy);
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switch (psp) {
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case POWER_SUPPLY_PROP_ONLINE:
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val->intval = sbs->charger_present;
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break;
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default:
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return -EINVAL;
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}
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return 0;
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}
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static int acpi_battery_technology(struct acpi_battery *battery)
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{
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if (!strcasecmp("NiCd", battery->device_chemistry))
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return POWER_SUPPLY_TECHNOLOGY_NiCd;
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if (!strcasecmp("NiMH", battery->device_chemistry))
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return POWER_SUPPLY_TECHNOLOGY_NiMH;
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if (!strcasecmp("LION", battery->device_chemistry))
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return POWER_SUPPLY_TECHNOLOGY_LION;
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if (!strcasecmp("LiP", battery->device_chemistry))
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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_sbs_battery_get_property(struct power_supply *psy,
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enum power_supply_property psp,
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union power_supply_propval *val)
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{
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struct acpi_battery *battery = to_acpi_battery(psy);
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if ((!battery->present) && psp != POWER_SUPPLY_PROP_PRESENT)
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return -ENODEV;
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acpi_battery_get_state(battery);
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switch (psp) {
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case POWER_SUPPLY_PROP_STATUS:
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if (battery->rate_now < 0)
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val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
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else if (battery->rate_now > 0)
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val->intval = POWER_SUPPLY_STATUS_CHARGING;
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else
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val->intval = POWER_SUPPLY_STATUS_FULL;
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break;
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case POWER_SUPPLY_PROP_PRESENT:
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val->intval = battery->present;
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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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val->intval = battery->design_voltage *
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acpi_battery_vscale(battery) * 1000;
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break;
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case POWER_SUPPLY_PROP_VOLTAGE_NOW:
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val->intval = battery->voltage_now *
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acpi_battery_vscale(battery) * 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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val->intval = abs(battery->rate_now) *
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acpi_battery_ipscale(battery) * 1000;
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val->intval *= (acpi_battery_mode(battery)) ?
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(battery->voltage_now *
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acpi_battery_vscale(battery) / 1000) : 1;
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break;
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case POWER_SUPPLY_PROP_CURRENT_AVG:
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case POWER_SUPPLY_PROP_POWER_AVG:
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val->intval = abs(battery->rate_avg) *
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acpi_battery_ipscale(battery) * 1000;
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val->intval *= (acpi_battery_mode(battery)) ?
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(battery->voltage_now *
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acpi_battery_vscale(battery) / 1000) : 1;
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break;
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case POWER_SUPPLY_PROP_CAPACITY:
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val->intval = battery->state_of_charge;
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break;
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case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
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case POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN:
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val->intval = battery->design_capacity *
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acpi_battery_scale(battery) * 1000;
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break;
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case POWER_SUPPLY_PROP_CHARGE_FULL:
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case POWER_SUPPLY_PROP_ENERGY_FULL:
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val->intval = battery->full_charge_capacity *
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acpi_battery_scale(battery) * 1000;
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break;
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case POWER_SUPPLY_PROP_CHARGE_NOW:
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case POWER_SUPPLY_PROP_ENERGY_NOW:
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val->intval = battery->capacity_now *
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acpi_battery_scale(battery) * 1000;
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break;
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case POWER_SUPPLY_PROP_TEMP:
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val->intval = battery->temp_now - 2730; // dK -> dC
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break;
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case POWER_SUPPLY_PROP_MODEL_NAME:
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val->strval = battery->device_name;
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break;
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case POWER_SUPPLY_PROP_MANUFACTURER:
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val->strval = battery->manufacturer_name;
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break;
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default:
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return -EINVAL;
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}
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return 0;
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}
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static enum power_supply_property sbs_ac_props[] = {
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POWER_SUPPLY_PROP_ONLINE,
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};
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static enum power_supply_property sbs_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_CURRENT_AVG,
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POWER_SUPPLY_PROP_CAPACITY,
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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_TEMP,
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POWER_SUPPLY_PROP_MODEL_NAME,
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POWER_SUPPLY_PROP_MANUFACTURER,
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};
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static enum power_supply_property sbs_energy_battery_props[] = {
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POWER_SUPPLY_PROP_STATUS,
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POWER_SUPPLY_PROP_PRESENT,
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POWER_SUPPLY_PROP_TECHNOLOGY,
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POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
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POWER_SUPPLY_PROP_VOLTAGE_NOW,
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POWER_SUPPLY_PROP_CURRENT_NOW,
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POWER_SUPPLY_PROP_CURRENT_AVG,
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POWER_SUPPLY_PROP_POWER_NOW,
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POWER_SUPPLY_PROP_POWER_AVG,
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POWER_SUPPLY_PROP_CAPACITY,
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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_TEMP,
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POWER_SUPPLY_PROP_MODEL_NAME,
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POWER_SUPPLY_PROP_MANUFACTURER,
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};
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static const struct power_supply_desc acpi_sbs_charger_desc = {
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.name = "sbs-charger",
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.type = POWER_SUPPLY_TYPE_MAINS,
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.properties = sbs_ac_props,
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.num_properties = ARRAY_SIZE(sbs_ac_props),
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.get_property = sbs_get_ac_property,
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};
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/* --------------------------------------------------------------------------
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Smart Battery System Management
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-------------------------------------------------------------------------- */
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struct acpi_battery_reader {
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u8 command; /* command for battery */
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u8 mode; /* word or block? */
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size_t offset; /* offset inside struct acpi_sbs_battery */
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};
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static struct acpi_battery_reader info_readers[] = {
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{0x01, SMBUS_READ_WORD, offsetof(struct acpi_battery, alarm_capacity)},
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{0x03, SMBUS_READ_WORD, offsetof(struct acpi_battery, mode)},
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{0x10, SMBUS_READ_WORD, offsetof(struct acpi_battery, full_charge_capacity)},
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{0x17, SMBUS_READ_WORD, offsetof(struct acpi_battery, cycle_count)},
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{0x18, SMBUS_READ_WORD, offsetof(struct acpi_battery, design_capacity)},
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{0x19, SMBUS_READ_WORD, offsetof(struct acpi_battery, design_voltage)},
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{0x1a, SMBUS_READ_WORD, offsetof(struct acpi_battery, spec)},
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{0x1c, SMBUS_READ_WORD, offsetof(struct acpi_battery, serial_number)},
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{0x20, SMBUS_READ_BLOCK, offsetof(struct acpi_battery, manufacturer_name)},
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{0x21, SMBUS_READ_BLOCK, offsetof(struct acpi_battery, device_name)},
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{0x22, SMBUS_READ_BLOCK, offsetof(struct acpi_battery, device_chemistry)},
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};
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static struct acpi_battery_reader state_readers[] = {
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{0x08, SMBUS_READ_WORD, offsetof(struct acpi_battery, temp_now)},
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{0x09, SMBUS_READ_WORD, offsetof(struct acpi_battery, voltage_now)},
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{0x0a, SMBUS_READ_WORD, offsetof(struct acpi_battery, rate_now)},
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{0x0b, SMBUS_READ_WORD, offsetof(struct acpi_battery, rate_avg)},
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{0x0f, SMBUS_READ_WORD, offsetof(struct acpi_battery, capacity_now)},
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{0x0e, SMBUS_READ_WORD, offsetof(struct acpi_battery, state_of_charge)},
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{0x16, SMBUS_READ_WORD, offsetof(struct acpi_battery, state)},
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};
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static int acpi_manager_get_info(struct acpi_sbs *sbs)
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{
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int result = 0;
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u16 battery_system_info;
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result = acpi_smbus_read(sbs->hc, SMBUS_READ_WORD, ACPI_SBS_MANAGER,
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0x04, (u8 *)&battery_system_info);
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if (!result)
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sbs->batteries_supported = battery_system_info & 0x000f;
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return result;
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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 i, result = 0;
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for (i = 0; i < ARRAY_SIZE(info_readers); ++i) {
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result = acpi_smbus_read(battery->sbs->hc,
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info_readers[i].mode,
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ACPI_SBS_BATTERY,
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info_readers[i].command,
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(u8 *) battery +
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info_readers[i].offset);
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if (result)
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break;
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}
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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 i, result = 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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for (i = 0; i < ARRAY_SIZE(state_readers); ++i) {
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result = acpi_smbus_read(battery->sbs->hc,
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state_readers[i].mode,
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ACPI_SBS_BATTERY,
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state_readers[i].command,
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(u8 *)battery +
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state_readers[i].offset);
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if (result)
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goto end;
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}
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end:
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battery->update_time = jiffies;
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return result;
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}
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static int acpi_battery_get_alarm(struct acpi_battery *battery)
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{
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return acpi_smbus_read(battery->sbs->hc, SMBUS_READ_WORD,
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ACPI_SBS_BATTERY, 0x01,
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(u8 *)&battery->alarm_capacity);
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}
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static int acpi_battery_set_alarm(struct acpi_battery *battery)
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{
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struct acpi_sbs *sbs = battery->sbs;
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u16 value, sel = 1 << (battery->id + 12);
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int ret;
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if (sbs->manager_present) {
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ret = acpi_smbus_read(sbs->hc, SMBUS_READ_WORD, ACPI_SBS_MANAGER,
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0x01, (u8 *)&value);
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if (ret)
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goto end;
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if ((value & 0xf000) != sel) {
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value &= 0x0fff;
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value |= sel;
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ret = acpi_smbus_write(sbs->hc, SMBUS_WRITE_WORD,
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ACPI_SBS_MANAGER,
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0x01, (u8 *)&value, 2);
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if (ret)
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goto end;
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}
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}
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ret = acpi_smbus_write(sbs->hc, SMBUS_WRITE_WORD, ACPI_SBS_BATTERY,
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0x01, (u8 *)&battery->alarm_capacity, 2);
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end:
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return ret;
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}
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static int acpi_ac_get_present(struct acpi_sbs *sbs)
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{
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int result;
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u16 status;
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|
|
result = acpi_smbus_read(sbs->hc, SMBUS_READ_WORD, ACPI_SBS_CHARGER,
|
|
0x13, (u8 *) & status);
|
|
|
|
if (result)
|
|
return result;
|
|
|
|
/*
|
|
* The spec requires that bit 4 always be 1. If it's not set, assume
|
|
* that the implementation doesn't support an SBS charger.
|
|
*
|
|
* And on some MacBooks a status of 0xffff is always returned, no
|
|
* matter whether the charger is plugged in or not, which is also
|
|
* wrong, so ignore the SBS charger for those too.
|
|
*/
|
|
if (!((status >> 4) & 0x1) || status == 0xffff)
|
|
return -ENODEV;
|
|
|
|
sbs->charger_present = (status >> 15) & 0x1;
|
|
return 0;
|
|
}
|
|
|
|
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));
|
|
acpi_battery_get_alarm(battery);
|
|
return sprintf(buf, "%d\n", battery->alarm_capacity *
|
|
acpi_battery_scale(battery) * 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_capacity = x /
|
|
(1000 * acpi_battery_scale(battery));
|
|
if (battery->present)
|
|
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,
|
|
};
|
|
|
|
/* --------------------------------------------------------------------------
|
|
Driver Interface
|
|
-------------------------------------------------------------------------- */
|
|
static int acpi_battery_read(struct acpi_battery *battery)
|
|
{
|
|
int result = 0, saved_present = battery->present;
|
|
u16 state;
|
|
|
|
if (battery->sbs->manager_present) {
|
|
result = acpi_smbus_read(battery->sbs->hc, SMBUS_READ_WORD,
|
|
ACPI_SBS_MANAGER, 0x01, (u8 *)&state);
|
|
if (!result)
|
|
battery->present = state & (1 << battery->id);
|
|
state &= 0x0fff;
|
|
state |= 1 << (battery->id + 12);
|
|
acpi_smbus_write(battery->sbs->hc, SMBUS_WRITE_WORD,
|
|
ACPI_SBS_MANAGER, 0x01, (u8 *)&state, 2);
|
|
} else if (battery->id == 0)
|
|
battery->present = 1;
|
|
|
|
if (result || !battery->present)
|
|
return result;
|
|
|
|
if (saved_present != battery->present) {
|
|
battery->update_time = 0;
|
|
result = acpi_battery_get_info(battery);
|
|
if (result) {
|
|
battery->present = 0;
|
|
return result;
|
|
}
|
|
}
|
|
result = acpi_battery_get_state(battery);
|
|
if (result)
|
|
battery->present = 0;
|
|
return result;
|
|
}
|
|
|
|
/* Smart Battery */
|
|
static int acpi_battery_add(struct acpi_sbs *sbs, int id)
|
|
{
|
|
struct acpi_battery *battery = &sbs->battery[id];
|
|
struct power_supply_config psy_cfg = { .drv_data = battery, };
|
|
int result;
|
|
|
|
battery->id = id;
|
|
battery->sbs = sbs;
|
|
result = acpi_battery_read(battery);
|
|
if (result)
|
|
return result;
|
|
|
|
sprintf(battery->name, ACPI_BATTERY_DIR_NAME, id);
|
|
battery->bat_desc.name = battery->name;
|
|
battery->bat_desc.type = POWER_SUPPLY_TYPE_BATTERY;
|
|
if (!acpi_battery_mode(battery)) {
|
|
battery->bat_desc.properties = sbs_charge_battery_props;
|
|
battery->bat_desc.num_properties =
|
|
ARRAY_SIZE(sbs_charge_battery_props);
|
|
} else {
|
|
battery->bat_desc.properties = sbs_energy_battery_props;
|
|
battery->bat_desc.num_properties =
|
|
ARRAY_SIZE(sbs_energy_battery_props);
|
|
}
|
|
battery->bat_desc.get_property = acpi_sbs_battery_get_property;
|
|
battery->bat = power_supply_register(&sbs->device->dev,
|
|
&battery->bat_desc, &psy_cfg);
|
|
if (IS_ERR(battery->bat)) {
|
|
result = PTR_ERR(battery->bat);
|
|
battery->bat = NULL;
|
|
goto end;
|
|
}
|
|
|
|
result = device_create_file(&battery->bat->dev, &alarm_attr);
|
|
if (result)
|
|
goto end;
|
|
battery->have_sysfs_alarm = 1;
|
|
end:
|
|
printk(KERN_INFO PREFIX "%s [%s]: Battery Slot [%s] (battery %s)\n",
|
|
ACPI_SBS_DEVICE_NAME, acpi_device_bid(sbs->device),
|
|
battery->name, battery->present ? "present" : "absent");
|
|
return result;
|
|
}
|
|
|
|
static void acpi_battery_remove(struct acpi_sbs *sbs, int id)
|
|
{
|
|
struct acpi_battery *battery = &sbs->battery[id];
|
|
|
|
if (battery->bat) {
|
|
if (battery->have_sysfs_alarm)
|
|
device_remove_file(&battery->bat->dev, &alarm_attr);
|
|
power_supply_unregister(battery->bat);
|
|
}
|
|
}
|
|
|
|
static int acpi_charger_add(struct acpi_sbs *sbs)
|
|
{
|
|
int result;
|
|
struct power_supply_config psy_cfg = { .drv_data = sbs, };
|
|
|
|
result = acpi_ac_get_present(sbs);
|
|
if (result)
|
|
goto end;
|
|
|
|
sbs->charger_exists = 1;
|
|
sbs->charger = power_supply_register(&sbs->device->dev,
|
|
&acpi_sbs_charger_desc, &psy_cfg);
|
|
if (IS_ERR(sbs->charger)) {
|
|
result = PTR_ERR(sbs->charger);
|
|
sbs->charger = NULL;
|
|
}
|
|
printk(KERN_INFO PREFIX "%s [%s]: AC Adapter [%s] (%s)\n",
|
|
ACPI_SBS_DEVICE_NAME, acpi_device_bid(sbs->device),
|
|
ACPI_AC_DIR_NAME, sbs->charger_present ? "on-line" : "off-line");
|
|
end:
|
|
return result;
|
|
}
|
|
|
|
static void acpi_charger_remove(struct acpi_sbs *sbs)
|
|
{
|
|
if (sbs->charger)
|
|
power_supply_unregister(sbs->charger);
|
|
}
|
|
|
|
static void acpi_sbs_callback(void *context)
|
|
{
|
|
int id;
|
|
struct acpi_sbs *sbs = context;
|
|
struct acpi_battery *bat;
|
|
u8 saved_charger_state = sbs->charger_present;
|
|
u8 saved_battery_state;
|
|
|
|
if (sbs->charger_exists) {
|
|
acpi_ac_get_present(sbs);
|
|
if (sbs->charger_present != saved_charger_state)
|
|
kobject_uevent(&sbs->charger->dev.kobj, KOBJ_CHANGE);
|
|
}
|
|
|
|
if (sbs->manager_present) {
|
|
for (id = 0; id < MAX_SBS_BAT; ++id) {
|
|
if (!(sbs->batteries_supported & (1 << id)))
|
|
continue;
|
|
bat = &sbs->battery[id];
|
|
saved_battery_state = bat->present;
|
|
acpi_battery_read(bat);
|
|
if (saved_battery_state == bat->present)
|
|
continue;
|
|
kobject_uevent(&bat->bat->dev.kobj, KOBJ_CHANGE);
|
|
}
|
|
}
|
|
}
|
|
|
|
static int acpi_sbs_add(struct acpi_device *device)
|
|
{
|
|
struct acpi_sbs *sbs;
|
|
int result = 0;
|
|
int id;
|
|
|
|
sbs = kzalloc(sizeof(struct acpi_sbs), GFP_KERNEL);
|
|
if (!sbs) {
|
|
result = -ENOMEM;
|
|
goto end;
|
|
}
|
|
|
|
mutex_init(&sbs->lock);
|
|
|
|
sbs->hc = acpi_driver_data(device->parent);
|
|
sbs->device = device;
|
|
strcpy(acpi_device_name(device), ACPI_SBS_DEVICE_NAME);
|
|
strcpy(acpi_device_class(device), ACPI_SBS_CLASS);
|
|
device->driver_data = sbs;
|
|
|
|
result = acpi_charger_add(sbs);
|
|
if (result && result != -ENODEV)
|
|
goto end;
|
|
|
|
result = 0;
|
|
|
|
if (!x86_apple_machine) {
|
|
result = acpi_manager_get_info(sbs);
|
|
if (!result) {
|
|
sbs->manager_present = 1;
|
|
for (id = 0; id < MAX_SBS_BAT; ++id)
|
|
if ((sbs->batteries_supported & (1 << id)))
|
|
acpi_battery_add(sbs, id);
|
|
}
|
|
}
|
|
|
|
if (!sbs->manager_present)
|
|
acpi_battery_add(sbs, 0);
|
|
|
|
acpi_smbus_register_callback(sbs->hc, acpi_sbs_callback, sbs);
|
|
end:
|
|
if (result)
|
|
acpi_sbs_remove(device);
|
|
return result;
|
|
}
|
|
|
|
static int acpi_sbs_remove(struct acpi_device *device)
|
|
{
|
|
struct acpi_sbs *sbs;
|
|
int id;
|
|
|
|
if (!device)
|
|
return -EINVAL;
|
|
sbs = acpi_driver_data(device);
|
|
if (!sbs)
|
|
return -EINVAL;
|
|
mutex_lock(&sbs->lock);
|
|
acpi_smbus_unregister_callback(sbs->hc);
|
|
for (id = 0; id < MAX_SBS_BAT; ++id)
|
|
acpi_battery_remove(sbs, id);
|
|
acpi_charger_remove(sbs);
|
|
mutex_unlock(&sbs->lock);
|
|
mutex_destroy(&sbs->lock);
|
|
kfree(sbs);
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_PM_SLEEP
|
|
static int acpi_sbs_resume(struct device *dev)
|
|
{
|
|
struct acpi_sbs *sbs;
|
|
if (!dev)
|
|
return -EINVAL;
|
|
sbs = to_acpi_device(dev)->driver_data;
|
|
acpi_sbs_callback(sbs);
|
|
return 0;
|
|
}
|
|
#else
|
|
#define acpi_sbs_resume NULL
|
|
#endif
|
|
|
|
static SIMPLE_DEV_PM_OPS(acpi_sbs_pm, NULL, acpi_sbs_resume);
|
|
|
|
static struct acpi_driver acpi_sbs_driver = {
|
|
.name = "sbs",
|
|
.class = ACPI_SBS_CLASS,
|
|
.ids = sbs_device_ids,
|
|
.ops = {
|
|
.add = acpi_sbs_add,
|
|
.remove = acpi_sbs_remove,
|
|
},
|
|
.drv.pm = &acpi_sbs_pm,
|
|
};
|
|
|
|
static int __init acpi_sbs_init(void)
|
|
{
|
|
int result = 0;
|
|
|
|
if (acpi_disabled)
|
|
return -ENODEV;
|
|
|
|
result = acpi_bus_register_driver(&acpi_sbs_driver);
|
|
if (result < 0)
|
|
return -ENODEV;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void __exit acpi_sbs_exit(void)
|
|
{
|
|
acpi_bus_unregister_driver(&acpi_sbs_driver);
|
|
return;
|
|
}
|
|
|
|
module_init(acpi_sbs_init);
|
|
module_exit(acpi_sbs_exit);
|