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812 lines
21 KiB
C
812 lines
21 KiB
C
/*
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* acpi_battery.c - ACPI Battery Driver ($Revision: 37 $)
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*
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* Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com>
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* Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
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*
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* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or (at
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* your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
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*
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* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/types.h>
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#include <linux/proc_fs.h>
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#include <linux/seq_file.h>
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#include <asm/uaccess.h>
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#include <acpi/acpi_bus.h>
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#include <acpi/acpi_drivers.h>
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#define ACPI_BATTERY_VALUE_UNKNOWN 0xFFFFFFFF
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#define ACPI_BATTERY_FORMAT_BIF "NNNNNNNNNSSSS"
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#define ACPI_BATTERY_FORMAT_BST "NNNN"
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#define ACPI_BATTERY_COMPONENT 0x00040000
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#define ACPI_BATTERY_CLASS "battery"
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#define ACPI_BATTERY_HID "PNP0C0A"
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#define ACPI_BATTERY_DRIVER_NAME "ACPI Battery Driver"
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#define ACPI_BATTERY_DEVICE_NAME "Battery"
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#define ACPI_BATTERY_FILE_INFO "info"
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#define ACPI_BATTERY_FILE_STATUS "state"
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#define ACPI_BATTERY_FILE_ALARM "alarm"
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#define ACPI_BATTERY_NOTIFY_STATUS 0x80
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#define ACPI_BATTERY_NOTIFY_INFO 0x81
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#define ACPI_BATTERY_UNITS_WATTS "mW"
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#define ACPI_BATTERY_UNITS_AMPS "mA"
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#define _COMPONENT ACPI_BATTERY_COMPONENT
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ACPI_MODULE_NAME("acpi_battery")
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MODULE_AUTHOR("Paul Diefenbaugh");
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MODULE_DESCRIPTION(ACPI_BATTERY_DRIVER_NAME);
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MODULE_LICENSE("GPL");
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static int acpi_battery_add(struct acpi_device *device);
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static int acpi_battery_remove(struct acpi_device *device, int type);
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static struct acpi_driver acpi_battery_driver = {
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.name = ACPI_BATTERY_DRIVER_NAME,
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.class = ACPI_BATTERY_CLASS,
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.ids = ACPI_BATTERY_HID,
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.ops = {
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.add = acpi_battery_add,
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.remove = acpi_battery_remove,
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},
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};
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struct acpi_battery_status {
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acpi_integer state;
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acpi_integer present_rate;
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acpi_integer remaining_capacity;
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acpi_integer present_voltage;
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};
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struct acpi_battery_info {
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acpi_integer power_unit;
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acpi_integer design_capacity;
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acpi_integer last_full_capacity;
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acpi_integer battery_technology;
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acpi_integer design_voltage;
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acpi_integer design_capacity_warning;
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acpi_integer design_capacity_low;
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acpi_integer battery_capacity_granularity_1;
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acpi_integer battery_capacity_granularity_2;
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acpi_string model_number;
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acpi_string serial_number;
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acpi_string battery_type;
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acpi_string oem_info;
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};
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struct acpi_battery_flags {
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u8 present:1; /* Bay occupied? */
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u8 power_unit:1; /* 0=watts, 1=apms */
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u8 alarm:1; /* _BTP present? */
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u8 reserved:5;
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};
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struct acpi_battery_trips {
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unsigned long warning;
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unsigned long low;
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};
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struct acpi_battery {
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acpi_handle handle;
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struct acpi_battery_flags flags;
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struct acpi_battery_trips trips;
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unsigned long alarm;
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struct acpi_battery_info *info;
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};
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/* --------------------------------------------------------------------------
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Battery Management
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-------------------------------------------------------------------------- */
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static int
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acpi_battery_get_info(struct acpi_battery *battery,
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struct acpi_battery_info **bif)
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{
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int result = 0;
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acpi_status status = 0;
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struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
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struct acpi_buffer format = { sizeof(ACPI_BATTERY_FORMAT_BIF),
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ACPI_BATTERY_FORMAT_BIF
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};
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struct acpi_buffer data = { 0, NULL };
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union acpi_object *package = NULL;
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ACPI_FUNCTION_TRACE("acpi_battery_get_info");
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if (!battery || !bif)
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return_VALUE(-EINVAL);
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/* Evalute _BIF */
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status = acpi_evaluate_object(battery->handle, "_BIF", NULL, &buffer);
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if (ACPI_FAILURE(status)) {
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ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Error evaluating _BIF\n"));
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return_VALUE(-ENODEV);
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}
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package = (union acpi_object *)buffer.pointer;
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/* Extract Package Data */
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status = acpi_extract_package(package, &format, &data);
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if (status != AE_BUFFER_OVERFLOW) {
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ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Error extracting _BIF\n"));
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result = -ENODEV;
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goto end;
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}
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data.pointer = kmalloc(data.length, GFP_KERNEL);
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if (!data.pointer) {
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result = -ENOMEM;
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goto end;
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}
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memset(data.pointer, 0, data.length);
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status = acpi_extract_package(package, &format, &data);
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if (ACPI_FAILURE(status)) {
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ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Error extracting _BIF\n"));
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kfree(data.pointer);
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result = -ENODEV;
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goto end;
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}
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end:
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acpi_os_free(buffer.pointer);
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if (!result)
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(*bif) = (struct acpi_battery_info *)data.pointer;
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return_VALUE(result);
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}
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static int
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acpi_battery_get_status(struct acpi_battery *battery,
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struct acpi_battery_status **bst)
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{
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int result = 0;
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acpi_status status = 0;
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struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
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struct acpi_buffer format = { sizeof(ACPI_BATTERY_FORMAT_BST),
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ACPI_BATTERY_FORMAT_BST
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};
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struct acpi_buffer data = { 0, NULL };
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union acpi_object *package = NULL;
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ACPI_FUNCTION_TRACE("acpi_battery_get_status");
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if (!battery || !bst)
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return_VALUE(-EINVAL);
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/* Evalute _BST */
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status = acpi_evaluate_object(battery->handle, "_BST", NULL, &buffer);
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if (ACPI_FAILURE(status)) {
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ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Error evaluating _BST\n"));
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return_VALUE(-ENODEV);
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}
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package = (union acpi_object *)buffer.pointer;
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/* Extract Package Data */
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status = acpi_extract_package(package, &format, &data);
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if (status != AE_BUFFER_OVERFLOW) {
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ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Error extracting _BST\n"));
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result = -ENODEV;
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goto end;
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}
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data.pointer = kmalloc(data.length, GFP_KERNEL);
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if (!data.pointer) {
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result = -ENOMEM;
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goto end;
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}
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memset(data.pointer, 0, data.length);
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status = acpi_extract_package(package, &format, &data);
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if (ACPI_FAILURE(status)) {
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ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Error extracting _BST\n"));
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kfree(data.pointer);
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result = -ENODEV;
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goto end;
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}
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end:
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acpi_os_free(buffer.pointer);
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if (!result)
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(*bst) = (struct acpi_battery_status *)data.pointer;
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return_VALUE(result);
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}
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static int
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acpi_battery_set_alarm(struct acpi_battery *battery, unsigned long alarm)
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{
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acpi_status status = 0;
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union acpi_object arg0 = { ACPI_TYPE_INTEGER };
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struct acpi_object_list arg_list = { 1, &arg0 };
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ACPI_FUNCTION_TRACE("acpi_battery_set_alarm");
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if (!battery)
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return_VALUE(-EINVAL);
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if (!battery->flags.alarm)
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return_VALUE(-ENODEV);
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arg0.integer.value = alarm;
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status = acpi_evaluate_object(battery->handle, "_BTP", &arg_list, NULL);
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if (ACPI_FAILURE(status))
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return_VALUE(-ENODEV);
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ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Alarm set to %d\n", (u32) alarm));
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battery->alarm = alarm;
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return_VALUE(0);
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}
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static int acpi_battery_check(struct acpi_battery *battery)
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{
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int result = 0;
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acpi_status status = AE_OK;
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acpi_handle handle = NULL;
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struct acpi_device *device = NULL;
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struct acpi_battery_info *bif = NULL;
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ACPI_FUNCTION_TRACE("acpi_battery_check");
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if (!battery)
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return_VALUE(-EINVAL);
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result = acpi_bus_get_device(battery->handle, &device);
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if (result)
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return_VALUE(result);
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result = acpi_bus_get_status(device);
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if (result)
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return_VALUE(result);
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/* Insertion? */
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if (!battery->flags.present && device->status.battery_present) {
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ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Battery inserted\n"));
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/* Evalute _BIF to get certain static information */
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result = acpi_battery_get_info(battery, &bif);
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if (result)
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return_VALUE(result);
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battery->flags.power_unit = bif->power_unit;
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battery->trips.warning = bif->design_capacity_warning;
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battery->trips.low = bif->design_capacity_low;
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kfree(bif);
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/* See if alarms are supported, and if so, set default */
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status = acpi_get_handle(battery->handle, "_BTP", &handle);
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if (ACPI_SUCCESS(status)) {
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battery->flags.alarm = 1;
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acpi_battery_set_alarm(battery, battery->trips.warning);
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}
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}
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/* Removal? */
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else if (battery->flags.present && !device->status.battery_present) {
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ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Battery removed\n"));
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}
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battery->flags.present = device->status.battery_present;
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return_VALUE(result);
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}
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/* --------------------------------------------------------------------------
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FS Interface (/proc)
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-------------------------------------------------------------------------- */
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static struct proc_dir_entry *acpi_battery_dir;
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static int acpi_battery_read_info(struct seq_file *seq, void *offset)
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{
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int result = 0;
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struct acpi_battery *battery = (struct acpi_battery *)seq->private;
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struct acpi_battery_info *bif = NULL;
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char *units = "?";
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ACPI_FUNCTION_TRACE("acpi_battery_read_info");
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if (!battery)
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goto end;
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if (battery->flags.present)
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seq_printf(seq, "present: yes\n");
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else {
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seq_printf(seq, "present: no\n");
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goto end;
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}
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/* Battery Info (_BIF) */
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result = acpi_battery_get_info(battery, &bif);
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if (result || !bif) {
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seq_printf(seq, "ERROR: Unable to read battery information\n");
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goto end;
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}
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units =
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bif->
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power_unit ? ACPI_BATTERY_UNITS_AMPS : ACPI_BATTERY_UNITS_WATTS;
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if (bif->design_capacity == ACPI_BATTERY_VALUE_UNKNOWN)
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seq_printf(seq, "design capacity: unknown\n");
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else
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seq_printf(seq, "design capacity: %d %sh\n",
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(u32) bif->design_capacity, units);
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if (bif->last_full_capacity == ACPI_BATTERY_VALUE_UNKNOWN)
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seq_printf(seq, "last full capacity: unknown\n");
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else
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seq_printf(seq, "last full capacity: %d %sh\n",
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(u32) bif->last_full_capacity, units);
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switch ((u32) bif->battery_technology) {
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case 0:
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seq_printf(seq, "battery technology: non-rechargeable\n");
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break;
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case 1:
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seq_printf(seq, "battery technology: rechargeable\n");
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break;
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default:
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seq_printf(seq, "battery technology: unknown\n");
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break;
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}
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if (bif->design_voltage == ACPI_BATTERY_VALUE_UNKNOWN)
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seq_printf(seq, "design voltage: unknown\n");
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else
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seq_printf(seq, "design voltage: %d mV\n",
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(u32) bif->design_voltage);
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seq_printf(seq, "design capacity warning: %d %sh\n",
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(u32) bif->design_capacity_warning, units);
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seq_printf(seq, "design capacity low: %d %sh\n",
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(u32) bif->design_capacity_low, units);
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seq_printf(seq, "capacity granularity 1: %d %sh\n",
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(u32) bif->battery_capacity_granularity_1, units);
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seq_printf(seq, "capacity granularity 2: %d %sh\n",
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(u32) bif->battery_capacity_granularity_2, units);
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seq_printf(seq, "model number: %s\n", bif->model_number);
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seq_printf(seq, "serial number: %s\n", bif->serial_number);
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seq_printf(seq, "battery type: %s\n", bif->battery_type);
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seq_printf(seq, "OEM info: %s\n", bif->oem_info);
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end:
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kfree(bif);
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return_VALUE(0);
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}
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static int acpi_battery_info_open_fs(struct inode *inode, struct file *file)
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{
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return single_open(file, acpi_battery_read_info, PDE(inode)->data);
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}
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static int acpi_battery_read_state(struct seq_file *seq, void *offset)
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{
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int result = 0;
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struct acpi_battery *battery = (struct acpi_battery *)seq->private;
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struct acpi_battery_status *bst = NULL;
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char *units = "?";
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ACPI_FUNCTION_TRACE("acpi_battery_read_state");
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if (!battery)
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goto end;
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if (battery->flags.present)
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seq_printf(seq, "present: yes\n");
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else {
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seq_printf(seq, "present: no\n");
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goto end;
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}
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/* Battery Units */
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units =
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battery->flags.
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power_unit ? ACPI_BATTERY_UNITS_AMPS : ACPI_BATTERY_UNITS_WATTS;
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/* Battery Status (_BST) */
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result = acpi_battery_get_status(battery, &bst);
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if (result || !bst) {
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seq_printf(seq, "ERROR: Unable to read battery status\n");
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goto end;
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}
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if (!(bst->state & 0x04))
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seq_printf(seq, "capacity state: ok\n");
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else
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seq_printf(seq, "capacity state: critical\n");
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if ((bst->state & 0x01) && (bst->state & 0x02)) {
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seq_printf(seq,
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"charging state: charging/discharging\n");
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ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
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"Battery Charging and Discharging?\n"));
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} else if (bst->state & 0x01)
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seq_printf(seq, "charging state: discharging\n");
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else if (bst->state & 0x02)
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seq_printf(seq, "charging state: charging\n");
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else {
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seq_printf(seq, "charging state: charged\n");
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}
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if (bst->present_rate == ACPI_BATTERY_VALUE_UNKNOWN)
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seq_printf(seq, "present rate: unknown\n");
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else
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seq_printf(seq, "present rate: %d %s\n",
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(u32) bst->present_rate, units);
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if (bst->remaining_capacity == ACPI_BATTERY_VALUE_UNKNOWN)
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seq_printf(seq, "remaining capacity: unknown\n");
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else
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seq_printf(seq, "remaining capacity: %d %sh\n",
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(u32) bst->remaining_capacity, units);
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if (bst->present_voltage == ACPI_BATTERY_VALUE_UNKNOWN)
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seq_printf(seq, "present voltage: unknown\n");
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else
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seq_printf(seq, "present voltage: %d mV\n",
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(u32) bst->present_voltage);
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end:
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kfree(bst);
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return_VALUE(0);
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}
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static int acpi_battery_state_open_fs(struct inode *inode, struct file *file)
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{
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return single_open(file, acpi_battery_read_state, PDE(inode)->data);
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}
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static int acpi_battery_read_alarm(struct seq_file *seq, void *offset)
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{
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struct acpi_battery *battery = (struct acpi_battery *)seq->private;
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char *units = "?";
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ACPI_FUNCTION_TRACE("acpi_battery_read_alarm");
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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_VALUE(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 = (struct seq_file *)file->private_data;
|
|
struct acpi_battery *battery = (struct acpi_battery *)m->private;
|
|
|
|
ACPI_FUNCTION_TRACE("acpi_battery_write_alarm");
|
|
|
|
if (!battery || (count > sizeof(alarm_string) - 1))
|
|
return_VALUE(-EINVAL);
|
|
|
|
if (!battery->flags.present)
|
|
return_VALUE(-ENODEV);
|
|
|
|
if (copy_from_user(alarm_string, buffer, count))
|
|
return_VALUE(-EFAULT);
|
|
|
|
alarm_string[count] = '\0';
|
|
|
|
result = acpi_battery_set_alarm(battery,
|
|
simple_strtoul(alarm_string, NULL, 0));
|
|
if (result)
|
|
return_VALUE(result);
|
|
|
|
return_VALUE(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 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 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 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;
|
|
|
|
ACPI_FUNCTION_TRACE("acpi_battery_add_fs");
|
|
|
|
if (!acpi_device_dir(device)) {
|
|
acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device),
|
|
acpi_battery_dir);
|
|
if (!acpi_device_dir(device))
|
|
return_VALUE(-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)
|
|
ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
|
|
"Unable to create '%s' fs entry\n",
|
|
ACPI_BATTERY_FILE_INFO));
|
|
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)
|
|
ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
|
|
"Unable to create '%s' fs entry\n",
|
|
ACPI_BATTERY_FILE_STATUS));
|
|
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)
|
|
ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
|
|
"Unable to create '%s' fs entry\n",
|
|
ACPI_BATTERY_FILE_ALARM));
|
|
else {
|
|
entry->proc_fops = &acpi_battery_alarm_ops;
|
|
entry->data = acpi_driver_data(device);
|
|
entry->owner = THIS_MODULE;
|
|
}
|
|
|
|
return_VALUE(0);
|
|
}
|
|
|
|
static int acpi_battery_remove_fs(struct acpi_device *device)
|
|
{
|
|
ACPI_FUNCTION_TRACE("acpi_battery_remove_fs");
|
|
|
|
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_VALUE(0);
|
|
}
|
|
|
|
/* --------------------------------------------------------------------------
|
|
Driver Interface
|
|
-------------------------------------------------------------------------- */
|
|
|
|
static void acpi_battery_notify(acpi_handle handle, u32 event, void *data)
|
|
{
|
|
struct acpi_battery *battery = (struct acpi_battery *)data;
|
|
struct acpi_device *device = NULL;
|
|
|
|
ACPI_FUNCTION_TRACE("acpi_battery_notify");
|
|
|
|
if (!battery)
|
|
return_VOID;
|
|
|
|
if (acpi_bus_get_device(handle, &device))
|
|
return_VOID;
|
|
|
|
switch (event) {
|
|
case ACPI_BATTERY_NOTIFY_STATUS:
|
|
case ACPI_BATTERY_NOTIFY_INFO:
|
|
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_VOID;
|
|
}
|
|
|
|
static int acpi_battery_add(struct acpi_device *device)
|
|
{
|
|
int result = 0;
|
|
acpi_status status = 0;
|
|
struct acpi_battery *battery = NULL;
|
|
|
|
ACPI_FUNCTION_TRACE("acpi_battery_add");
|
|
|
|
if (!device)
|
|
return_VALUE(-EINVAL);
|
|
|
|
battery = kmalloc(sizeof(struct acpi_battery), GFP_KERNEL);
|
|
if (!battery)
|
|
return_VALUE(-ENOMEM);
|
|
memset(battery, 0, sizeof(struct acpi_battery));
|
|
|
|
battery->handle = device->handle;
|
|
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(battery->handle,
|
|
ACPI_DEVICE_NOTIFY,
|
|
acpi_battery_notify, battery);
|
|
if (ACPI_FAILURE(status)) {
|
|
ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
|
|
"Error installing notify handler\n"));
|
|
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_VALUE(result);
|
|
}
|
|
|
|
static int acpi_battery_remove(struct acpi_device *device, int type)
|
|
{
|
|
acpi_status status = 0;
|
|
struct acpi_battery *battery = NULL;
|
|
|
|
ACPI_FUNCTION_TRACE("acpi_battery_remove");
|
|
|
|
if (!device || !acpi_driver_data(device))
|
|
return_VALUE(-EINVAL);
|
|
|
|
battery = (struct acpi_battery *)acpi_driver_data(device);
|
|
|
|
status = acpi_remove_notify_handler(battery->handle,
|
|
ACPI_DEVICE_NOTIFY,
|
|
acpi_battery_notify);
|
|
if (ACPI_FAILURE(status))
|
|
ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
|
|
"Error removing notify handler\n"));
|
|
|
|
acpi_battery_remove_fs(device);
|
|
|
|
kfree(battery);
|
|
|
|
return_VALUE(0);
|
|
}
|
|
|
|
static int __init acpi_battery_init(void)
|
|
{
|
|
int result = 0;
|
|
|
|
ACPI_FUNCTION_TRACE("acpi_battery_init");
|
|
|
|
acpi_battery_dir = proc_mkdir(ACPI_BATTERY_CLASS, acpi_root_dir);
|
|
if (!acpi_battery_dir)
|
|
return_VALUE(-ENODEV);
|
|
acpi_battery_dir->owner = THIS_MODULE;
|
|
|
|
result = acpi_bus_register_driver(&acpi_battery_driver);
|
|
if (result < 0) {
|
|
remove_proc_entry(ACPI_BATTERY_CLASS, acpi_root_dir);
|
|
return_VALUE(-ENODEV);
|
|
}
|
|
|
|
return_VALUE(0);
|
|
}
|
|
|
|
static void __exit acpi_battery_exit(void)
|
|
{
|
|
ACPI_FUNCTION_TRACE("acpi_battery_exit");
|
|
|
|
acpi_bus_unregister_driver(&acpi_battery_driver);
|
|
|
|
remove_proc_entry(ACPI_BATTERY_CLASS, acpi_root_dir);
|
|
|
|
return_VOID;
|
|
}
|
|
|
|
module_init(acpi_battery_init);
|
|
module_exit(acpi_battery_exit);
|