| /* |
| * acpi_battery.c - ACPI Battery Driver ($Revision: 37 $) |
| * |
| * Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com> |
| * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com> |
| * |
| * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| * |
| * 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/kernel.h> |
| #include <linux/module.h> |
| #include <linux/init.h> |
| #include <linux/types.h> |
| #include <linux/proc_fs.h> |
| #include <linux/seq_file.h> |
| #include <asm/uaccess.h> |
| |
| #include <acpi/acpi_bus.h> |
| #include <acpi/acpi_drivers.h> |
| |
| #define ACPI_BATTERY_VALUE_UNKNOWN 0xFFFFFFFF |
| |
| #define ACPI_BATTERY_FORMAT_BIF "NNNNNNNNNSSSS" |
| #define ACPI_BATTERY_FORMAT_BST "NNNN" |
| |
| #define ACPI_BATTERY_COMPONENT 0x00040000 |
| #define ACPI_BATTERY_CLASS "battery" |
| #define ACPI_BATTERY_HID "PNP0C0A" |
| #define ACPI_BATTERY_DRIVER_NAME "ACPI Battery Driver" |
| #define ACPI_BATTERY_DEVICE_NAME "Battery" |
| #define ACPI_BATTERY_FILE_INFO "info" |
| #define ACPI_BATTERY_FILE_STATUS "state" |
| #define ACPI_BATTERY_FILE_ALARM "alarm" |
| #define ACPI_BATTERY_NOTIFY_STATUS 0x80 |
| #define ACPI_BATTERY_NOTIFY_INFO 0x81 |
| #define ACPI_BATTERY_UNITS_WATTS "mW" |
| #define ACPI_BATTERY_UNITS_AMPS "mA" |
| |
| #define _COMPONENT ACPI_BATTERY_COMPONENT |
| ACPI_MODULE_NAME("acpi_battery") |
| |
| MODULE_AUTHOR("Paul Diefenbaugh"); |
| MODULE_DESCRIPTION(ACPI_BATTERY_DRIVER_NAME); |
| MODULE_LICENSE("GPL"); |
| |
| extern struct proc_dir_entry *acpi_lock_battery_dir(void); |
| extern void *acpi_unlock_battery_dir(struct proc_dir_entry *acpi_battery_dir); |
| |
| static int acpi_battery_add(struct acpi_device *device); |
| static int acpi_battery_remove(struct acpi_device *device, int type); |
| |
| static struct acpi_driver acpi_battery_driver = { |
| .name = ACPI_BATTERY_DRIVER_NAME, |
| .class = ACPI_BATTERY_CLASS, |
| .ids = ACPI_BATTERY_HID, |
| .ops = { |
| .add = acpi_battery_add, |
| .remove = acpi_battery_remove, |
| }, |
| }; |
| |
| struct acpi_battery_status { |
| acpi_integer state; |
| acpi_integer present_rate; |
| acpi_integer remaining_capacity; |
| acpi_integer present_voltage; |
| }; |
| |
| struct acpi_battery_info { |
| acpi_integer power_unit; |
| acpi_integer design_capacity; |
| acpi_integer last_full_capacity; |
| acpi_integer battery_technology; |
| acpi_integer design_voltage; |
| acpi_integer design_capacity_warning; |
| acpi_integer design_capacity_low; |
| acpi_integer battery_capacity_granularity_1; |
| acpi_integer battery_capacity_granularity_2; |
| acpi_string model_number; |
| acpi_string serial_number; |
| acpi_string battery_type; |
| acpi_string oem_info; |
| }; |
| |
| struct acpi_battery_flags { |
| u8 present:1; /* Bay occupied? */ |
| u8 power_unit:1; /* 0=watts, 1=apms */ |
| u8 alarm:1; /* _BTP present? */ |
| u8 reserved:5; |
| }; |
| |
| struct acpi_battery_trips { |
| unsigned long warning; |
| unsigned long low; |
| }; |
| |
| struct acpi_battery { |
| struct acpi_device * device; |
| struct acpi_battery_flags flags; |
| struct acpi_battery_trips trips; |
| unsigned long alarm; |
| struct acpi_battery_info *info; |
| }; |
| |
| /* -------------------------------------------------------------------------- |
| Battery Management |
| -------------------------------------------------------------------------- */ |
| |
| static int |
| acpi_battery_get_info(struct acpi_battery *battery, |
| struct acpi_battery_info **bif) |
| { |
| int result = 0; |
| acpi_status status = 0; |
| struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
| struct acpi_buffer format = { sizeof(ACPI_BATTERY_FORMAT_BIF), |
| ACPI_BATTERY_FORMAT_BIF |
| }; |
| struct acpi_buffer data = { 0, NULL }; |
| union acpi_object *package = NULL; |
| |
| |
| if (!battery || !bif) |
| return -EINVAL; |
| |
| /* Evalute _BIF */ |
| |
| status = acpi_evaluate_object(battery->device->handle, "_BIF", NULL, &buffer); |
| if (ACPI_FAILURE(status)) { |
| ACPI_EXCEPTION((AE_INFO, status, "Evaluating _BIF")); |
| return -ENODEV; |
| } |
| |
| package = buffer.pointer; |
| |
| /* Extract Package Data */ |
| |
| status = acpi_extract_package(package, &format, &data); |
| if (status != AE_BUFFER_OVERFLOW) { |
| ACPI_EXCEPTION((AE_INFO, status, "Extracting _BIF")); |
| result = -ENODEV; |
| goto end; |
| } |
| |
| data.pointer = kmalloc(data.length, GFP_KERNEL); |
| if (!data.pointer) { |
| result = -ENOMEM; |
| goto end; |
| } |
| memset(data.pointer, 0, data.length); |
| |
| status = acpi_extract_package(package, &format, &data); |
| if (ACPI_FAILURE(status)) { |
| ACPI_EXCEPTION((AE_INFO, status, "Extracting _BIF")); |
| kfree(data.pointer); |
| result = -ENODEV; |
| goto end; |
| } |
| |
| end: |
| kfree(buffer.pointer); |
| |
| if (!result) |
| (*bif) = data.pointer; |
| |
| return result; |
| } |
| |
| static int |
| acpi_battery_get_status(struct acpi_battery *battery, |
| struct acpi_battery_status **bst) |
| { |
| int result = 0; |
| acpi_status status = 0; |
| struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
| struct acpi_buffer format = { sizeof(ACPI_BATTERY_FORMAT_BST), |
| ACPI_BATTERY_FORMAT_BST |
| }; |
| struct acpi_buffer data = { 0, NULL }; |
| union acpi_object *package = NULL; |
| |
| |
| if (!battery || !bst) |
| return -EINVAL; |
| |
| /* Evalute _BST */ |
| |
| status = acpi_evaluate_object(battery->device->handle, "_BST", NULL, &buffer); |
| if (ACPI_FAILURE(status)) { |
| ACPI_EXCEPTION((AE_INFO, status, "Evaluating _BST")); |
| return -ENODEV; |
| } |
| |
| package = buffer.pointer; |
| |
| /* Extract Package Data */ |
| |
| status = acpi_extract_package(package, &format, &data); |
| if (status != AE_BUFFER_OVERFLOW) { |
| ACPI_EXCEPTION((AE_INFO, status, "Extracting _BST")); |
| result = -ENODEV; |
| goto end; |
| } |
| |
| data.pointer = kmalloc(data.length, GFP_KERNEL); |
| if (!data.pointer) { |
| result = -ENOMEM; |
| goto end; |
| } |
| memset(data.pointer, 0, data.length); |
| |
| status = acpi_extract_package(package, &format, &data); |
| if (ACPI_FAILURE(status)) { |
| ACPI_EXCEPTION((AE_INFO, status, "Extracting _BST")); |
| kfree(data.pointer); |
| result = -ENODEV; |
| goto end; |
| } |
| |
| end: |
| kfree(buffer.pointer); |
| |
| if (!result) |
| (*bst) = data.pointer; |
| |
| return result; |
| } |
| |
| static int |
| acpi_battery_set_alarm(struct acpi_battery *battery, unsigned long alarm) |
| { |
| acpi_status status = 0; |
| union acpi_object arg0 = { ACPI_TYPE_INTEGER }; |
| struct acpi_object_list arg_list = { 1, &arg0 }; |
| |
| |
| if (!battery) |
| return -EINVAL; |
| |
| if (!battery->flags.alarm) |
| return -ENODEV; |
| |
| arg0.integer.value = alarm; |
| |
| status = acpi_evaluate_object(battery->device->handle, "_BTP", &arg_list, NULL); |
| if (ACPI_FAILURE(status)) |
| return -ENODEV; |
| |
| ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Alarm set to %d\n", (u32) alarm)); |
| |
| battery->alarm = alarm; |
| |
| return 0; |
| } |
| |
| static int acpi_battery_check(struct acpi_battery *battery) |
| { |
| int result = 0; |
| acpi_status status = AE_OK; |
| acpi_handle handle = NULL; |
| struct acpi_device *device = NULL; |
| struct acpi_battery_info *bif = NULL; |
| |
| |
| if (!battery) |
| return -EINVAL; |
| |
| device = battery->device; |
| |
| result = acpi_bus_get_status(device); |
| if (result) |
| return result; |
| |
| /* Insertion? */ |
| |
| if (!battery->flags.present && device->status.battery_present) { |
| |
| ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Battery inserted\n")); |
| |
| /* Evalute _BIF to get certain static information */ |
| |
| result = acpi_battery_get_info(battery, &bif); |
| if (result) |
| return result; |
| |
| battery->flags.power_unit = bif->power_unit; |
| battery->trips.warning = bif->design_capacity_warning; |
| battery->trips.low = bif->design_capacity_low; |
| kfree(bif); |
| |
| /* See if alarms are supported, and if so, set default */ |
| |
| status = acpi_get_handle(battery->device->handle, "_BTP", &handle); |
| if (ACPI_SUCCESS(status)) { |
| battery->flags.alarm = 1; |
| acpi_battery_set_alarm(battery, battery->trips.warning); |
| } |
| } |
| |
| /* Removal? */ |
| |
| else if (battery->flags.present && !device->status.battery_present) { |
| ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Battery removed\n")); |
| } |
| |
| battery->flags.present = device->status.battery_present; |
| |
| return result; |
| } |
| |
| /* -------------------------------------------------------------------------- |
| FS Interface (/proc) |
| -------------------------------------------------------------------------- */ |
| |
| static struct proc_dir_entry *acpi_battery_dir; |
| static int acpi_battery_read_info(struct seq_file *seq, void *offset) |
| { |
| int result = 0; |
| struct acpi_battery *battery = seq->private; |
| struct acpi_battery_info *bif = NULL; |
| char *units = "?"; |
| |
| |
| if (!battery) |
| goto end; |
| |
| if (battery->flags.present) |
| seq_printf(seq, "present: yes\n"); |
| else { |
| seq_printf(seq, "present: no\n"); |
| goto end; |
| } |
| |
| /* Battery Info (_BIF) */ |
| |
| result = acpi_battery_get_info(battery, &bif); |
| if (result || !bif) { |
| seq_printf(seq, "ERROR: Unable to read battery information\n"); |
| goto end; |
| } |
| |
| units = |
| bif-> |
| power_unit ? ACPI_BATTERY_UNITS_AMPS : ACPI_BATTERY_UNITS_WATTS; |
| |
| if (bif->design_capacity == ACPI_BATTERY_VALUE_UNKNOWN) |
| seq_printf(seq, "design capacity: unknown\n"); |
| else |
| seq_printf(seq, "design capacity: %d %sh\n", |
| (u32) bif->design_capacity, units); |
| |
| if (bif->last_full_capacity == ACPI_BATTERY_VALUE_UNKNOWN) |
| seq_printf(seq, "last full capacity: unknown\n"); |
| else |
| seq_printf(seq, "last full capacity: %d %sh\n", |
| (u32) bif->last_full_capacity, units); |
| |
| switch ((u32) bif->battery_technology) { |
| case 0: |
| seq_printf(seq, "battery technology: non-rechargeable\n"); |
| break; |
| case 1: |
| seq_printf(seq, "battery technology: rechargeable\n"); |
| break; |
| default: |
| seq_printf(seq, "battery technology: unknown\n"); |
| break; |
| } |
| |
| if (bif->design_voltage == ACPI_BATTERY_VALUE_UNKNOWN) |
| seq_printf(seq, "design voltage: unknown\n"); |
| else |
| seq_printf(seq, "design voltage: %d mV\n", |
| (u32) bif->design_voltage); |
| |
| seq_printf(seq, "design capacity warning: %d %sh\n", |
| (u32) bif->design_capacity_warning, units); |
| seq_printf(seq, "design capacity low: %d %sh\n", |
| (u32) bif->design_capacity_low, units); |
| seq_printf(seq, "capacity granularity 1: %d %sh\n", |
| (u32) bif->battery_capacity_granularity_1, units); |
| seq_printf(seq, "capacity granularity 2: %d %sh\n", |
| (u32) bif->battery_capacity_granularity_2, units); |
| seq_printf(seq, "model number: %s\n", bif->model_number); |
| seq_printf(seq, "serial number: %s\n", bif->serial_number); |
| seq_printf(seq, "battery type: %s\n", bif->battery_type); |
| seq_printf(seq, "OEM info: %s\n", bif->oem_info); |
| |
| end: |
| kfree(bif); |
| |
| return 0; |
| } |
| |
| static int acpi_battery_info_open_fs(struct inode *inode, struct file *file) |
| { |
| return single_open(file, acpi_battery_read_info, PDE(inode)->data); |
| } |
| |
| static int acpi_battery_read_state(struct seq_file *seq, void *offset) |
| { |
| int result = 0; |
| struct acpi_battery *battery = seq->private; |
| struct acpi_battery_status *bst = NULL; |
| char *units = "?"; |
| |
| |
| if (!battery) |
| goto end; |
| |
| if (battery->flags.present) |
| seq_printf(seq, "present: yes\n"); |
| else { |
| seq_printf(seq, "present: no\n"); |
| goto end; |
| } |
| |
| /* Battery Units */ |
| |
| units = |
| battery->flags. |
| power_unit ? ACPI_BATTERY_UNITS_AMPS : ACPI_BATTERY_UNITS_WATTS; |
| |
| /* Battery Status (_BST) */ |
| |
| result = acpi_battery_get_status(battery, &bst); |
| if (result || !bst) { |
| seq_printf(seq, "ERROR: Unable to read battery status\n"); |
| goto end; |
| } |
| |
| if (!(bst->state & 0x04)) |
| seq_printf(seq, "capacity state: ok\n"); |
| else |
| seq_printf(seq, "capacity state: critical\n"); |
| |
| if ((bst->state & 0x01) && (bst->state & 0x02)) { |
| seq_printf(seq, |
| "charging state: charging/discharging\n"); |
| } else if (bst->state & 0x01) |
| seq_printf(seq, "charging state: discharging\n"); |
| else if (bst->state & 0x02) |
| seq_printf(seq, "charging state: charging\n"); |
| else { |
| seq_printf(seq, "charging state: charged\n"); |
| } |
| |
| if (bst->present_rate == ACPI_BATTERY_VALUE_UNKNOWN) |
| seq_printf(seq, "present rate: unknown\n"); |
| else |
| seq_printf(seq, "present rate: %d %s\n", |
| (u32) bst->present_rate, units); |
| |
| if (bst->remaining_capacity == ACPI_BATTERY_VALUE_UNKNOWN) |
| seq_printf(seq, "remaining capacity: unknown\n"); |
| else |
| seq_printf(seq, "remaining capacity: %d %sh\n", |
| (u32) bst->remaining_capacity, units); |
| |
| if (bst->present_voltage == ACPI_BATTERY_VALUE_UNKNOWN) |
| seq_printf(seq, "present voltage: unknown\n"); |
| else |
| seq_printf(seq, "present voltage: %d mV\n", |
| (u32) bst->present_voltage); |
| |
| end: |
| kfree(bst); |
| |
| return 0; |
| } |
| |
| static int acpi_battery_state_open_fs(struct inode *inode, struct file *file) |
| { |
| return single_open(file, acpi_battery_read_state, PDE(inode)->data); |
| } |
| |
| static int acpi_battery_read_alarm(struct seq_file *seq, void *offset) |
| { |
| struct acpi_battery *battery = seq->private; |
| char *units = "?"; |
| |
| |
| if (!battery) |
| goto end; |
| |
| if (!battery->flags.present) { |
| seq_printf(seq, "present: no\n"); |
| goto end; |
| } |
| |
| /* Battery Units */ |
| |
| units = |
| battery->flags. |
| power_unit ? ACPI_BATTERY_UNITS_AMPS : ACPI_BATTERY_UNITS_WATTS; |
| |
| /* Battery Alarm */ |
| |
| seq_printf(seq, "alarm: "); |
| if (!battery->alarm) |
| seq_printf(seq, "unsupported\n"); |
| else |
| seq_printf(seq, "%d %sh\n", (u32) battery->alarm, units); |
| |
| end: |
| return 0; |
| } |
| |
| 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 (!battery->flags.present) |
| return -ENODEV; |
| |
| if (copy_from_user(alarm_string, buffer, count)) |
| return -EFAULT; |
| |
| alarm_string[count] = '\0'; |
| |
| result = acpi_battery_set_alarm(battery, |
| simple_strtoul(alarm_string, NULL, 0)); |
| if (result) |
| return result; |
| |
| return count; |
| } |
| |
| static int acpi_battery_alarm_open_fs(struct inode *inode, struct file *file) |
| { |
| return single_open(file, acpi_battery_read_alarm, PDE(inode)->data); |
| } |
| |
| static const struct file_operations acpi_battery_info_ops = { |
| .open = acpi_battery_info_open_fs, |
| .read = seq_read, |
| .llseek = seq_lseek, |
| .release = single_release, |
| .owner = THIS_MODULE, |
| }; |
| |
| static const struct file_operations acpi_battery_state_ops = { |
| .open = acpi_battery_state_open_fs, |
| .read = seq_read, |
| .llseek = seq_lseek, |
| .release = single_release, |
| .owner = THIS_MODULE, |
| }; |
| |
| static const struct file_operations acpi_battery_alarm_ops = { |
| .open = acpi_battery_alarm_open_fs, |
| .read = seq_read, |
| .write = acpi_battery_write_alarm, |
| .llseek = seq_lseek, |
| .release = single_release, |
| .owner = THIS_MODULE, |
| }; |
| |
| static int acpi_battery_add_fs(struct acpi_device *device) |
| { |
| struct proc_dir_entry *entry = NULL; |
| |
| |
| 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; |
| acpi_device_dir(device)->owner = THIS_MODULE; |
| } |
| |
| /* 'info' [R] */ |
| entry = create_proc_entry(ACPI_BATTERY_FILE_INFO, |
| S_IRUGO, acpi_device_dir(device)); |
| if (!entry) |
| return -ENODEV; |
| else { |
| entry->proc_fops = &acpi_battery_info_ops; |
| entry->data = acpi_driver_data(device); |
| entry->owner = THIS_MODULE; |
| } |
| |
| /* 'status' [R] */ |
| entry = create_proc_entry(ACPI_BATTERY_FILE_STATUS, |
| S_IRUGO, acpi_device_dir(device)); |
| if (!entry) |
| return -ENODEV; |
| else { |
| entry->proc_fops = &acpi_battery_state_ops; |
| entry->data = acpi_driver_data(device); |
| entry->owner = THIS_MODULE; |
| } |
| |
| /* 'alarm' [R/W] */ |
| entry = create_proc_entry(ACPI_BATTERY_FILE_ALARM, |
| S_IFREG | S_IRUGO | S_IWUSR, |
| acpi_device_dir(device)); |
| if (!entry) |
| return -ENODEV; |
| else { |
| entry->proc_fops = &acpi_battery_alarm_ops; |
| entry->data = acpi_driver_data(device); |
| entry->owner = THIS_MODULE; |
| } |
| |
| return 0; |
| } |
| |
| static int acpi_battery_remove_fs(struct acpi_device *device) |
| { |
| |
| if (acpi_device_dir(device)) { |
| remove_proc_entry(ACPI_BATTERY_FILE_ALARM, |
| acpi_device_dir(device)); |
| remove_proc_entry(ACPI_BATTERY_FILE_STATUS, |
| acpi_device_dir(device)); |
| remove_proc_entry(ACPI_BATTERY_FILE_INFO, |
| acpi_device_dir(device)); |
| |
| remove_proc_entry(acpi_device_bid(device), acpi_battery_dir); |
| acpi_device_dir(device) = NULL; |
| } |
| |
| return 0; |
| } |
| |
| /* -------------------------------------------------------------------------- |
| Driver Interface |
| -------------------------------------------------------------------------- */ |
| |
| static void acpi_battery_notify(acpi_handle handle, u32 event, void *data) |
| { |
| struct acpi_battery *battery = data; |
| struct acpi_device *device = NULL; |
| |
| |
| if (!battery) |
| return; |
| |
| device = battery->device; |
| |
| switch (event) { |
| case ACPI_BATTERY_NOTIFY_STATUS: |
| case ACPI_BATTERY_NOTIFY_INFO: |
| case ACPI_NOTIFY_BUS_CHECK: |
| case ACPI_NOTIFY_DEVICE_CHECK: |
| acpi_battery_check(battery); |
| acpi_bus_generate_event(device, event, battery->flags.present); |
| break; |
| default: |
| ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
| "Unsupported event [0x%x]\n", event)); |
| break; |
| } |
| |
| return; |
| } |
| |
| static int acpi_battery_add(struct acpi_device *device) |
| { |
| int result = 0; |
| acpi_status status = 0; |
| struct acpi_battery *battery = NULL; |
| |
| |
| if (!device) |
| return -EINVAL; |
| |
| battery = kmalloc(sizeof(struct acpi_battery), GFP_KERNEL); |
| if (!battery) |
| return -ENOMEM; |
| memset(battery, 0, sizeof(struct acpi_battery)); |
| |
| battery->device = device; |
| strcpy(acpi_device_name(device), ACPI_BATTERY_DEVICE_NAME); |
| strcpy(acpi_device_class(device), ACPI_BATTERY_CLASS); |
| acpi_driver_data(device) = battery; |
| |
| result = acpi_battery_check(battery); |
| if (result) |
| goto end; |
| |
| result = acpi_battery_add_fs(device); |
| if (result) |
| goto end; |
| |
| status = acpi_install_notify_handler(device->handle, |
| ACPI_ALL_NOTIFY, |
| acpi_battery_notify, battery); |
| if (ACPI_FAILURE(status)) { |
| result = -ENODEV; |
| goto end; |
| } |
| |
| printk(KERN_INFO PREFIX "%s Slot [%s] (battery %s)\n", |
| ACPI_BATTERY_DEVICE_NAME, acpi_device_bid(device), |
| device->status.battery_present ? "present" : "absent"); |
| |
| end: |
| if (result) { |
| acpi_battery_remove_fs(device); |
| kfree(battery); |
| } |
| |
| return result; |
| } |
| |
| static int acpi_battery_remove(struct acpi_device *device, int type) |
| { |
| acpi_status status = 0; |
| struct acpi_battery *battery = NULL; |
| |
| |
| if (!device || !acpi_driver_data(device)) |
| return -EINVAL; |
| |
| battery = acpi_driver_data(device); |
| |
| status = acpi_remove_notify_handler(device->handle, |
| ACPI_ALL_NOTIFY, |
| acpi_battery_notify); |
| |
| acpi_battery_remove_fs(device); |
| |
| kfree(battery); |
| |
| return 0; |
| } |
| |
| static int __init acpi_battery_init(void) |
| { |
| int result; |
| |
| if (acpi_disabled) |
| return -ENODEV; |
| |
| acpi_battery_dir = acpi_lock_battery_dir(); |
| if (!acpi_battery_dir) |
| return -ENODEV; |
| |
| result = acpi_bus_register_driver(&acpi_battery_driver); |
| if (result < 0) { |
| acpi_unlock_battery_dir(acpi_battery_dir); |
| return -ENODEV; |
| } |
| |
| return 0; |
| } |
| |
| static void __exit acpi_battery_exit(void) |
| { |
| |
| acpi_bus_unregister_driver(&acpi_battery_driver); |
| |
| acpi_unlock_battery_dir(acpi_battery_dir); |
| |
| return; |
| } |
| |
| module_init(acpi_battery_init); |
| module_exit(acpi_battery_exit); |