| /* |
| * sbs.c - ACPI Smart Battery System Driver ($Revision: 2.0 $) |
| * |
| * Copyright (c) 2007 Alexey Starikovskiy <astarikovskiy@suse.de> |
| * Copyright (c) 2005-2007 Vladimir Lebedev <vladimir.p.lebedev@intel.com> |
| * Copyright (c) 2005 Rich Townsend <rhdt@bartol.udel.edu> |
| * |
| * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or (at |
| * your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, but |
| * WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * General Public License for more details. |
| * |
| * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| */ |
| |
| #include <linux/init.h> |
| #include <linux/slab.h> |
| #include <linux/module.h> |
| #include <linux/moduleparam.h> |
| #include <linux/kernel.h> |
| |
| #include <linux/acpi.h> |
| #include <linux/timer.h> |
| #include <linux/jiffies.h> |
| #include <linux/delay.h> |
| #include <linux/power_supply.h> |
| #include <linux/platform_data/x86/apple.h> |
| #include <acpi/battery.h> |
| |
| #include "sbshc.h" |
| |
| #define PREFIX "ACPI: " |
| |
| #define ACPI_SBS_CLASS "sbs" |
| #define ACPI_AC_CLASS "ac_adapter" |
| #define ACPI_SBS_DEVICE_NAME "Smart Battery System" |
| #define ACPI_SBS_FILE_INFO "info" |
| #define ACPI_SBS_FILE_STATE "state" |
| #define ACPI_SBS_FILE_ALARM "alarm" |
| #define ACPI_BATTERY_DIR_NAME "BAT%i" |
| #define ACPI_AC_DIR_NAME "AC0" |
| |
| #define ACPI_SBS_NOTIFY_STATUS 0x80 |
| #define ACPI_SBS_NOTIFY_INFO 0x81 |
| |
| MODULE_AUTHOR("Alexey Starikovskiy <astarikovskiy@suse.de>"); |
| MODULE_DESCRIPTION("Smart Battery System ACPI interface driver"); |
| MODULE_LICENSE("GPL"); |
| |
| static unsigned int cache_time = 1000; |
| module_param(cache_time, uint, 0644); |
| MODULE_PARM_DESC(cache_time, "cache time in milliseconds"); |
| |
| #define MAX_SBS_BAT 4 |
| #define ACPI_SBS_BLOCK_MAX 32 |
| |
| static const struct acpi_device_id sbs_device_ids[] = { |
| {"ACPI0002", 0}, |
| {"", 0}, |
| }; |
| MODULE_DEVICE_TABLE(acpi, sbs_device_ids); |
| |
| struct acpi_battery { |
| struct power_supply *bat; |
| struct power_supply_desc bat_desc; |
| struct acpi_sbs *sbs; |
| unsigned long update_time; |
| char name[8]; |
| char manufacturer_name[ACPI_SBS_BLOCK_MAX]; |
| char device_name[ACPI_SBS_BLOCK_MAX]; |
| char device_chemistry[ACPI_SBS_BLOCK_MAX]; |
| u16 alarm_capacity; |
| u16 full_charge_capacity; |
| u16 design_capacity; |
| u16 design_voltage; |
| u16 serial_number; |
| u16 cycle_count; |
| u16 temp_now; |
| u16 voltage_now; |
| s16 rate_now; |
| s16 rate_avg; |
| u16 capacity_now; |
| u16 state_of_charge; |
| u16 state; |
| u16 mode; |
| u16 spec; |
| u8 id; |
| u8 present:1; |
| u8 have_sysfs_alarm:1; |
| }; |
| |
| #define to_acpi_battery(x) power_supply_get_drvdata(x) |
| |
| struct acpi_sbs { |
| struct power_supply *charger; |
| struct acpi_device *device; |
| struct acpi_smb_hc *hc; |
| struct mutex lock; |
| struct acpi_battery battery[MAX_SBS_BAT]; |
| u8 batteries_supported:4; |
| u8 manager_present:1; |
| u8 charger_present:1; |
| u8 charger_exists:1; |
| }; |
| |
| #define to_acpi_sbs(x) power_supply_get_drvdata(x) |
| |
| static int acpi_sbs_remove(struct acpi_device *device); |
| static int acpi_battery_get_state(struct acpi_battery *battery); |
| |
| static inline int battery_scale(int log) |
| { |
| int scale = 1; |
| while (log--) |
| scale *= 10; |
| return scale; |
| } |
| |
| static inline int acpi_battery_vscale(struct acpi_battery *battery) |
| { |
| return battery_scale((battery->spec & 0x0f00) >> 8); |
| } |
| |
| static inline int acpi_battery_ipscale(struct acpi_battery *battery) |
| { |
| return battery_scale((battery->spec & 0xf000) >> 12); |
| } |
| |
| static inline int acpi_battery_mode(struct acpi_battery *battery) |
| { |
| return (battery->mode & 0x8000); |
| } |
| |
| static inline int acpi_battery_scale(struct acpi_battery *battery) |
| { |
| return (acpi_battery_mode(battery) ? 10 : 1) * |
| acpi_battery_ipscale(battery); |
| } |
| |
| static int sbs_get_ac_property(struct power_supply *psy, |
| enum power_supply_property psp, |
| union power_supply_propval *val) |
| { |
| struct acpi_sbs *sbs = to_acpi_sbs(psy); |
| switch (psp) { |
| case POWER_SUPPLY_PROP_ONLINE: |
| val->intval = sbs->charger_present; |
| break; |
| default: |
| return -EINVAL; |
| } |
| return 0; |
| } |
| |
| static int acpi_battery_technology(struct acpi_battery *battery) |
| { |
| if (!strcasecmp("NiCd", battery->device_chemistry)) |
| return POWER_SUPPLY_TECHNOLOGY_NiCd; |
| if (!strcasecmp("NiMH", battery->device_chemistry)) |
| return POWER_SUPPLY_TECHNOLOGY_NiMH; |
| if (!strcasecmp("LION", battery->device_chemistry)) |
| return POWER_SUPPLY_TECHNOLOGY_LION; |
| if (!strcasecmp("LiP", battery->device_chemistry)) |
| return POWER_SUPPLY_TECHNOLOGY_LIPO; |
| return POWER_SUPPLY_TECHNOLOGY_UNKNOWN; |
| } |
| |
| static int acpi_sbs_battery_get_property(struct power_supply *psy, |
| enum power_supply_property psp, |
| union power_supply_propval *val) |
| { |
| struct acpi_battery *battery = to_acpi_battery(psy); |
| |
| if ((!battery->present) && psp != POWER_SUPPLY_PROP_PRESENT) |
| return -ENODEV; |
| |
| acpi_battery_get_state(battery); |
| switch (psp) { |
| case POWER_SUPPLY_PROP_STATUS: |
| if (battery->rate_now < 0) |
| val->intval = POWER_SUPPLY_STATUS_DISCHARGING; |
| else if (battery->rate_now > 0) |
| val->intval = POWER_SUPPLY_STATUS_CHARGING; |
| else |
| val->intval = POWER_SUPPLY_STATUS_FULL; |
| break; |
| case POWER_SUPPLY_PROP_PRESENT: |
| val->intval = battery->present; |
| break; |
| case POWER_SUPPLY_PROP_TECHNOLOGY: |
| val->intval = acpi_battery_technology(battery); |
| break; |
| case POWER_SUPPLY_PROP_CYCLE_COUNT: |
| val->intval = battery->cycle_count; |
| break; |
| case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN: |
| val->intval = battery->design_voltage * |
| acpi_battery_vscale(battery) * 1000; |
| break; |
| case POWER_SUPPLY_PROP_VOLTAGE_NOW: |
| val->intval = battery->voltage_now * |
| acpi_battery_vscale(battery) * 1000; |
| break; |
| case POWER_SUPPLY_PROP_CURRENT_NOW: |
| case POWER_SUPPLY_PROP_POWER_NOW: |
| val->intval = abs(battery->rate_now) * |
| acpi_battery_ipscale(battery) * 1000; |
| val->intval *= (acpi_battery_mode(battery)) ? |
| (battery->voltage_now * |
| acpi_battery_vscale(battery) / 1000) : 1; |
| break; |
| case POWER_SUPPLY_PROP_CURRENT_AVG: |
| case POWER_SUPPLY_PROP_POWER_AVG: |
| val->intval = abs(battery->rate_avg) * |
| acpi_battery_ipscale(battery) * 1000; |
| val->intval *= (acpi_battery_mode(battery)) ? |
| (battery->voltage_now * |
| acpi_battery_vscale(battery) / 1000) : 1; |
| break; |
| case POWER_SUPPLY_PROP_CAPACITY: |
| val->intval = battery->state_of_charge; |
| break; |
| case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN: |
| case POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN: |
| val->intval = battery->design_capacity * |
| acpi_battery_scale(battery) * 1000; |
| break; |
| case POWER_SUPPLY_PROP_CHARGE_FULL: |
| case POWER_SUPPLY_PROP_ENERGY_FULL: |
| val->intval = battery->full_charge_capacity * |
| acpi_battery_scale(battery) * 1000; |
| break; |
| case POWER_SUPPLY_PROP_CHARGE_NOW: |
| case POWER_SUPPLY_PROP_ENERGY_NOW: |
| val->intval = battery->capacity_now * |
| acpi_battery_scale(battery) * 1000; |
| break; |
| case POWER_SUPPLY_PROP_TEMP: |
| val->intval = battery->temp_now - 2730; // dK -> dC |
| break; |
| case POWER_SUPPLY_PROP_MODEL_NAME: |
| val->strval = battery->device_name; |
| break; |
| case POWER_SUPPLY_PROP_MANUFACTURER: |
| val->strval = battery->manufacturer_name; |
| break; |
| default: |
| return -EINVAL; |
| } |
| return 0; |
| } |
| |
| static enum power_supply_property sbs_ac_props[] = { |
| POWER_SUPPLY_PROP_ONLINE, |
| }; |
| |
| static enum power_supply_property sbs_charge_battery_props[] = { |
| POWER_SUPPLY_PROP_STATUS, |
| POWER_SUPPLY_PROP_PRESENT, |
| POWER_SUPPLY_PROP_TECHNOLOGY, |
| POWER_SUPPLY_PROP_CYCLE_COUNT, |
| POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN, |
| POWER_SUPPLY_PROP_VOLTAGE_NOW, |
| POWER_SUPPLY_PROP_CURRENT_NOW, |
| POWER_SUPPLY_PROP_CURRENT_AVG, |
| POWER_SUPPLY_PROP_CAPACITY, |
| POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN, |
| POWER_SUPPLY_PROP_CHARGE_FULL, |
| POWER_SUPPLY_PROP_CHARGE_NOW, |
| POWER_SUPPLY_PROP_TEMP, |
| POWER_SUPPLY_PROP_MODEL_NAME, |
| POWER_SUPPLY_PROP_MANUFACTURER, |
| }; |
| |
| static enum power_supply_property sbs_energy_battery_props[] = { |
| POWER_SUPPLY_PROP_STATUS, |
| POWER_SUPPLY_PROP_PRESENT, |
| POWER_SUPPLY_PROP_TECHNOLOGY, |
| POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN, |
| POWER_SUPPLY_PROP_VOLTAGE_NOW, |
| POWER_SUPPLY_PROP_CURRENT_NOW, |
| POWER_SUPPLY_PROP_CURRENT_AVG, |
| POWER_SUPPLY_PROP_POWER_NOW, |
| POWER_SUPPLY_PROP_POWER_AVG, |
| POWER_SUPPLY_PROP_CAPACITY, |
| POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN, |
| POWER_SUPPLY_PROP_ENERGY_FULL, |
| POWER_SUPPLY_PROP_ENERGY_NOW, |
| POWER_SUPPLY_PROP_TEMP, |
| POWER_SUPPLY_PROP_MODEL_NAME, |
| POWER_SUPPLY_PROP_MANUFACTURER, |
| }; |
| |
| static const struct power_supply_desc acpi_sbs_charger_desc = { |
| .name = "sbs-charger", |
| .type = POWER_SUPPLY_TYPE_MAINS, |
| .properties = sbs_ac_props, |
| .num_properties = ARRAY_SIZE(sbs_ac_props), |
| .get_property = sbs_get_ac_property, |
| }; |
| |
| /* -------------------------------------------------------------------------- |
| Smart Battery System Management |
| -------------------------------------------------------------------------- */ |
| |
| struct acpi_battery_reader { |
| u8 command; /* command for battery */ |
| u8 mode; /* word or block? */ |
| size_t offset; /* offset inside struct acpi_sbs_battery */ |
| }; |
| |
| static struct acpi_battery_reader info_readers[] = { |
| {0x01, SMBUS_READ_WORD, offsetof(struct acpi_battery, alarm_capacity)}, |
| {0x03, SMBUS_READ_WORD, offsetof(struct acpi_battery, mode)}, |
| {0x10, SMBUS_READ_WORD, offsetof(struct acpi_battery, full_charge_capacity)}, |
| {0x17, SMBUS_READ_WORD, offsetof(struct acpi_battery, cycle_count)}, |
| {0x18, SMBUS_READ_WORD, offsetof(struct acpi_battery, design_capacity)}, |
| {0x19, SMBUS_READ_WORD, offsetof(struct acpi_battery, design_voltage)}, |
| {0x1a, SMBUS_READ_WORD, offsetof(struct acpi_battery, spec)}, |
| {0x1c, SMBUS_READ_WORD, offsetof(struct acpi_battery, serial_number)}, |
| {0x20, SMBUS_READ_BLOCK, offsetof(struct acpi_battery, manufacturer_name)}, |
| {0x21, SMBUS_READ_BLOCK, offsetof(struct acpi_battery, device_name)}, |
| {0x22, SMBUS_READ_BLOCK, offsetof(struct acpi_battery, device_chemistry)}, |
| }; |
| |
| static struct acpi_battery_reader state_readers[] = { |
| {0x08, SMBUS_READ_WORD, offsetof(struct acpi_battery, temp_now)}, |
| {0x09, SMBUS_READ_WORD, offsetof(struct acpi_battery, voltage_now)}, |
| {0x0a, SMBUS_READ_WORD, offsetof(struct acpi_battery, rate_now)}, |
| {0x0b, SMBUS_READ_WORD, offsetof(struct acpi_battery, rate_avg)}, |
| {0x0f, SMBUS_READ_WORD, offsetof(struct acpi_battery, capacity_now)}, |
| {0x0e, SMBUS_READ_WORD, offsetof(struct acpi_battery, state_of_charge)}, |
| {0x16, SMBUS_READ_WORD, offsetof(struct acpi_battery, state)}, |
| }; |
| |
| static int acpi_manager_get_info(struct acpi_sbs *sbs) |
| { |
| int result = 0; |
| u16 battery_system_info; |
| |
| result = acpi_smbus_read(sbs->hc, SMBUS_READ_WORD, ACPI_SBS_MANAGER, |
| 0x04, (u8 *)&battery_system_info); |
| if (!result) |
| sbs->batteries_supported = battery_system_info & 0x000f; |
| return result; |
| } |
| |
| static int acpi_battery_get_info(struct acpi_battery *battery) |
| { |
| int i, result = 0; |
| |
| for (i = 0; i < ARRAY_SIZE(info_readers); ++i) { |
| result = acpi_smbus_read(battery->sbs->hc, |
| info_readers[i].mode, |
| ACPI_SBS_BATTERY, |
| info_readers[i].command, |
| (u8 *) battery + |
| info_readers[i].offset); |
| if (result) |
| break; |
| } |
| return result; |
| } |
| |
| static int acpi_battery_get_state(struct acpi_battery *battery) |
| { |
| int i, result = 0; |
| |
| if (battery->update_time && |
| time_before(jiffies, battery->update_time + |
| msecs_to_jiffies(cache_time))) |
| return 0; |
| for (i = 0; i < ARRAY_SIZE(state_readers); ++i) { |
| result = acpi_smbus_read(battery->sbs->hc, |
| state_readers[i].mode, |
| ACPI_SBS_BATTERY, |
| state_readers[i].command, |
| (u8 *)battery + |
| state_readers[i].offset); |
| if (result) |
| goto end; |
| } |
| end: |
| battery->update_time = jiffies; |
| return result; |
| } |
| |
| static int acpi_battery_get_alarm(struct acpi_battery *battery) |
| { |
| return acpi_smbus_read(battery->sbs->hc, SMBUS_READ_WORD, |
| ACPI_SBS_BATTERY, 0x01, |
| (u8 *)&battery->alarm_capacity); |
| } |
| |
| static int acpi_battery_set_alarm(struct acpi_battery *battery) |
| { |
| struct acpi_sbs *sbs = battery->sbs; |
| u16 value, sel = 1 << (battery->id + 12); |
| |
| int ret; |
| |
| |
| if (sbs->manager_present) { |
| ret = acpi_smbus_read(sbs->hc, SMBUS_READ_WORD, ACPI_SBS_MANAGER, |
| 0x01, (u8 *)&value); |
| if (ret) |
| goto end; |
| if ((value & 0xf000) != sel) { |
| value &= 0x0fff; |
| value |= sel; |
| ret = acpi_smbus_write(sbs->hc, SMBUS_WRITE_WORD, |
| ACPI_SBS_MANAGER, |
| 0x01, (u8 *)&value, 2); |
| if (ret) |
| goto end; |
| } |
| } |
| ret = acpi_smbus_write(sbs->hc, SMBUS_WRITE_WORD, ACPI_SBS_BATTERY, |
| 0x01, (u8 *)&battery->alarm_capacity, 2); |
| end: |
| return ret; |
| } |
| |
| static int acpi_ac_get_present(struct acpi_sbs *sbs) |
| { |
| int result; |
| u16 status; |
| |
| 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 |
| */ |
| if (!((status >> 4) & 0x1)) |
| 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); |