--- /dev/null
+/*
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+ *
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ */
+
+#include <linux/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/dmi.h>
+
+#include "sbshc.h"
+#include "battery.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");
+
+static bool sbs_manager_broken;
+
+#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 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 disable_sbs_manager(const struct dmi_system_id *d)
+{
+ sbs_manager_broken = true;
+ return 0;
+}
+
+static struct dmi_system_id acpi_sbs_dmi_table[] = {
+ {
+ .callback = disable_sbs_manager,
+ .ident = "Apple",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "Apple Inc.")
+ },
+ },
+ { },
+};
+
+static int acpi_sbs_add(struct acpi_device *device)
+{
+ struct acpi_sbs *sbs;
+ int result = 0;
+ int id;
+
+ dmi_check_system(acpi_sbs_dmi_table);
+
+ 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 (!sbs_manager_broken) {
+ 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);
Code Review / kvmfornfv.git / blobdiff