78490d8212
In response to review comments from Andrew Morton Signed-off-by: Alexey Starikovskiy <aystarik@gmail.com> Signed-off-by: Len Brown <len.brown@intel.com>
1016 lines
24 KiB
C
1016 lines
24 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_DEVICE_NAME "Battery"
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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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#define ACPI_BATTERY_UPDATE_TIME 0
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#define ACPI_BATTERY_NONE_UPDATE 0
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#define ACPI_BATTERY_EASY_UPDATE 1
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#define ACPI_BATTERY_INIT_UPDATE 2
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ACPI_MODULE_NAME("battery");
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MODULE_AUTHOR("Paul Diefenbaugh");
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MODULE_DESCRIPTION("ACPI Battery Driver");
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MODULE_LICENSE("GPL");
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static unsigned int update_time = ACPI_BATTERY_UPDATE_TIME;
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/* 0 - every time, > 0 - by update_time */
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module_param(update_time, uint, 0644);
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extern struct proc_dir_entry *acpi_lock_battery_dir(void);
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extern void *acpi_unlock_battery_dir(struct proc_dir_entry *acpi_battery_dir);
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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 int acpi_battery_resume(struct acpi_device *device);
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static struct acpi_driver acpi_battery_driver = {
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.name = "battery",
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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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.resume = acpi_battery_resume,
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.remove = acpi_battery_remove,
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},
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};
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struct acpi_battery_state {
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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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enum acpi_battery_files{
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ACPI_BATTERY_INFO = 0,
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ACPI_BATTERY_STATE,
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ACPI_BATTERY_ALARM,
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ACPI_BATTERY_NUMFILES,
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};
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struct acpi_battery_flags {
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u8 battery_present_prev;
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u8 alarm_present;
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u8 init_update;
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u8 update[ACPI_BATTERY_NUMFILES];
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u8 power_unit;
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};
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struct acpi_battery {
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struct mutex mutex;
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struct acpi_device *device;
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struct acpi_battery_flags flags;
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struct acpi_buffer bif_data;
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struct acpi_buffer bst_data;
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unsigned long alarm;
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unsigned long update_time[ACPI_BATTERY_NUMFILES];
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};
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inline int acpi_battery_present(struct acpi_battery *battery)
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{
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return battery->device->status.battery_present;
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}
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inline char *acpi_battery_power_units(struct acpi_battery *battery)
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{
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if (battery->flags.power_unit)
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return ACPI_BATTERY_UNITS_AMPS;
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else
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return ACPI_BATTERY_UNITS_WATTS;
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}
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inline acpi_handle acpi_battery_handle(struct acpi_battery *battery)
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{
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return battery->device->handle;
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}
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/* --------------------------------------------------------------------------
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Battery Management
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-------------------------------------------------------------------------- */
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static void acpi_battery_check_result(struct acpi_battery *battery, int result)
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{
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if (!battery)
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return;
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if (result) {
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battery->flags.init_update = 1;
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}
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}
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static int acpi_battery_extract_package(struct acpi_battery *battery,
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union acpi_object *package,
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struct acpi_buffer *format,
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struct acpi_buffer *data,
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char *package_name)
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{
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acpi_status status = AE_OK;
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struct acpi_buffer data_null = { 0, NULL };
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status = acpi_extract_package(package, format, &data_null);
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if (status != AE_BUFFER_OVERFLOW) {
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ACPI_EXCEPTION((AE_INFO, status, "Extracting size %s",
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package_name));
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return -ENODEV;
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}
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if (data_null.length != data->length) {
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kfree(data->pointer);
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data->pointer = kzalloc(data_null.length, GFP_KERNEL);
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if (!data->pointer) {
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ACPI_EXCEPTION((AE_INFO, AE_NO_MEMORY, "kzalloc()"));
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return -ENOMEM;
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}
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data->length = data_null.length;
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}
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status = acpi_extract_package(package, format, data);
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if (ACPI_FAILURE(status)) {
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ACPI_EXCEPTION((AE_INFO, status, "Extracting %s",
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package_name));
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return -ENODEV;
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}
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return 0;
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}
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static int acpi_battery_get_status(struct acpi_battery *battery)
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{
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int result = 0;
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result = acpi_bus_get_status(battery->device);
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if (result) {
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ACPI_EXCEPTION((AE_INFO, AE_ERROR, "Evaluating _STA"));
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return -ENODEV;
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}
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return result;
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}
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static int acpi_battery_get_info(struct acpi_battery *battery)
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{
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int 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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union acpi_object *package = NULL;
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struct acpi_buffer *data = NULL;
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struct acpi_battery_info *bif = NULL;
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battery->update_time[ACPI_BATTERY_INFO] = get_seconds();
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if (!acpi_battery_present(battery))
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return 0;
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/* Evaluate _BIF */
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status =
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acpi_evaluate_object(acpi_battery_handle(battery), "_BIF", NULL,
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&buffer);
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if (ACPI_FAILURE(status)) {
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ACPI_EXCEPTION((AE_INFO, status, "Evaluating _BIF"));
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return -ENODEV;
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}
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package = buffer.pointer;
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data = &battery->bif_data;
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/* Extract Package Data */
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result =
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acpi_battery_extract_package(battery, package, &format, data,
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"_BIF");
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if (result)
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goto end;
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end:
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kfree(buffer.pointer);
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if (!result) {
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bif = data->pointer;
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battery->flags.power_unit = bif->power_unit;
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}
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return result;
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}
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static int acpi_battery_get_state(struct acpi_battery *battery)
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{
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int 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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union acpi_object *package = NULL;
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struct acpi_buffer *data = NULL;
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battery->update_time[ACPI_BATTERY_STATE] = get_seconds();
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if (!acpi_battery_present(battery))
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return 0;
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/* Evaluate _BST */
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status =
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acpi_evaluate_object(acpi_battery_handle(battery), "_BST", NULL,
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&buffer);
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if (ACPI_FAILURE(status)) {
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ACPI_EXCEPTION((AE_INFO, status, "Evaluating _BST"));
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return -ENODEV;
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}
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package = buffer.pointer;
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data = &battery->bst_data;
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/* Extract Package Data */
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result =
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acpi_battery_extract_package(battery, package, &format, data,
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"_BST");
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if (result)
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goto end;
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end:
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kfree(buffer.pointer);
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return result;
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}
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static int acpi_battery_get_alarm(struct acpi_battery *battery)
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{
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battery->update_time[ACPI_BATTERY_ALARM] = get_seconds();
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return 0;
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}
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static int acpi_battery_set_alarm(struct acpi_battery *battery,
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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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battery->update_time[ACPI_BATTERY_ALARM] = get_seconds();
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if (!acpi_battery_present(battery))
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return -ENODEV;
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if (!battery->flags.alarm_present)
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return -ENODEV;
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arg0.integer.value = alarm;
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status =
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acpi_evaluate_object(acpi_battery_handle(battery), "_BTP",
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&arg_list, NULL);
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if (ACPI_FAILURE(status))
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return -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 0;
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}
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static int acpi_battery_init_alarm(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_battery_info *bif = battery->bif_data.pointer;
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unsigned long alarm = battery->alarm;
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/* See if alarms are supported, and if so, set default */
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status = acpi_get_handle(acpi_battery_handle(battery), "_BTP", &handle);
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if (ACPI_SUCCESS(status)) {
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battery->flags.alarm_present = 1;
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if (!alarm && bif) {
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alarm = bif->design_capacity_warning;
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}
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result = acpi_battery_set_alarm(battery, alarm);
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if (result)
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goto end;
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} else {
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battery->flags.alarm_present = 0;
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}
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end:
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return result;
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}
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static int acpi_battery_init_update(struct acpi_battery *battery)
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{
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int result = 0;
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result = acpi_battery_get_status(battery);
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if (result)
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return result;
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battery->flags.battery_present_prev = acpi_battery_present(battery);
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if (acpi_battery_present(battery)) {
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result = acpi_battery_get_info(battery);
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if (result)
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return result;
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result = acpi_battery_get_state(battery);
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if (result)
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return result;
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acpi_battery_init_alarm(battery);
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}
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return result;
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}
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static int acpi_battery_update(struct acpi_battery *battery,
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int update, int *update_result_ptr)
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{
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int result = 0;
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int update_result = ACPI_BATTERY_NONE_UPDATE;
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if (!acpi_battery_present(battery)) {
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update = 1;
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}
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if (battery->flags.init_update) {
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result = acpi_battery_init_update(battery);
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if (result)
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goto end;
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update_result = ACPI_BATTERY_INIT_UPDATE;
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} else if (update) {
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result = acpi_battery_get_status(battery);
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if (result)
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goto end;
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if ((!battery->flags.battery_present_prev & acpi_battery_present(battery))
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|| (battery->flags.battery_present_prev & !acpi_battery_present(battery))) {
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result = acpi_battery_init_update(battery);
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if (result)
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goto end;
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update_result = ACPI_BATTERY_INIT_UPDATE;
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} else {
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update_result = ACPI_BATTERY_EASY_UPDATE;
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}
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}
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end:
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battery->flags.init_update = (result != 0);
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*update_result_ptr = update_result;
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return result;
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}
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static void acpi_battery_notify_update(struct acpi_battery *battery)
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{
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acpi_battery_get_status(battery);
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if (battery->flags.init_update) {
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return;
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}
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if ((!battery->flags.battery_present_prev &
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acpi_battery_present(battery)) ||
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(battery->flags.battery_present_prev &
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!acpi_battery_present(battery))) {
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battery->flags.init_update = 1;
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} else {
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battery->flags.update[ACPI_BATTERY_INFO] = 1;
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battery->flags.update[ACPI_BATTERY_STATE] = 1;
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battery->flags.update[ACPI_BATTERY_ALARM] = 1;
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}
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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_print_info(struct seq_file *seq, int result)
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{
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struct acpi_battery *battery = seq->private;
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struct acpi_battery_info *bif = NULL;
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char *units = "?";
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if (result)
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goto end;
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if (acpi_battery_present(battery))
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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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bif = battery->bif_data.pointer;
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if (!bif) {
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ACPI_EXCEPTION((AE_INFO, AE_ERROR, "BIF buffer is NULL"));
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result = -ENODEV;
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goto end;
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}
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/* Battery Units */
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units = acpi_battery_power_units(battery);
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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);
|
|
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:
|
|
|
|
if (result)
|
|
seq_printf(seq, "ERROR: Unable to read battery info\n");
|
|
|
|
return result;
|
|
}
|
|
|
|
static int acpi_battery_print_state(struct seq_file *seq, int result)
|
|
{
|
|
struct acpi_battery *battery = seq->private;
|
|
struct acpi_battery_state *bst = NULL;
|
|
char *units = "?";
|
|
|
|
if (result)
|
|
goto end;
|
|
|
|
if (acpi_battery_present(battery))
|
|
seq_printf(seq, "present: yes\n");
|
|
else {
|
|
seq_printf(seq, "present: no\n");
|
|
goto end;
|
|
}
|
|
|
|
bst = battery->bst_data.pointer;
|
|
if (!bst) {
|
|
ACPI_EXCEPTION((AE_INFO, AE_ERROR, "BST buffer is NULL"));
|
|
result = -ENODEV;
|
|
goto end;
|
|
}
|
|
|
|
/* Battery Units */
|
|
|
|
units = acpi_battery_power_units(battery);
|
|
|
|
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:
|
|
|
|
if (result) {
|
|
seq_printf(seq, "ERROR: Unable to read battery state\n");
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
static int acpi_battery_print_alarm(struct seq_file *seq, int result)
|
|
{
|
|
struct acpi_battery *battery = seq->private;
|
|
char *units = "?";
|
|
|
|
if (result)
|
|
goto end;
|
|
|
|
if (!acpi_battery_present(battery)) {
|
|
seq_printf(seq, "present: no\n");
|
|
goto end;
|
|
}
|
|
|
|
/* Battery Units */
|
|
|
|
units = acpi_battery_power_units(battery);
|
|
|
|
seq_printf(seq, "alarm: ");
|
|
if (!battery->alarm)
|
|
seq_printf(seq, "unsupported\n");
|
|
else
|
|
seq_printf(seq, "%lu %sh\n", battery->alarm, units);
|
|
|
|
end:
|
|
|
|
if (result)
|
|
seq_printf(seq, "ERROR: Unable to read battery alarm\n");
|
|
|
|
return result;
|
|
}
|
|
|
|
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;
|
|
int update_result = ACPI_BATTERY_NONE_UPDATE;
|
|
|
|
if (!battery || (count > sizeof(alarm_string) - 1))
|
|
return -EINVAL;
|
|
|
|
mutex_lock(&battery->mutex);
|
|
|
|
result = acpi_battery_update(battery, 1, &update_result);
|
|
if (result) {
|
|
result = -ENODEV;
|
|
goto end;
|
|
}
|
|
|
|
if (!acpi_battery_present(battery)) {
|
|
result = -ENODEV;
|
|
goto end;
|
|
}
|
|
|
|
if (copy_from_user(alarm_string, buffer, count)) {
|
|
result = -EFAULT;
|
|
goto end;
|
|
}
|
|
|
|
alarm_string[count] = '\0';
|
|
|
|
result = acpi_battery_set_alarm(battery,
|
|
simple_strtoul(alarm_string, NULL, 0));
|
|
if (result)
|
|
goto end;
|
|
|
|
end:
|
|
|
|
acpi_battery_check_result(battery, result);
|
|
|
|
if (!result)
|
|
result = count;
|
|
|
|
mutex_unlock(&battery->mutex);
|
|
|
|
return result;
|
|
}
|
|
|
|
typedef int(*print_func)(struct seq_file *seq, int result);
|
|
typedef int(*get_func)(struct acpi_battery *battery);
|
|
|
|
static struct acpi_read_mux {
|
|
print_func print;
|
|
get_func get;
|
|
} acpi_read_funcs[ACPI_BATTERY_NUMFILES] = {
|
|
{.get = acpi_battery_get_info, .print = acpi_battery_print_info},
|
|
{.get = acpi_battery_get_state, .print = acpi_battery_print_state},
|
|
{.get = acpi_battery_get_alarm, .print = acpi_battery_print_alarm},
|
|
};
|
|
|
|
static int acpi_battery_read(int fid, struct seq_file *seq)
|
|
{
|
|
struct acpi_battery *battery = seq->private;
|
|
int result = 0;
|
|
int update_result = ACPI_BATTERY_NONE_UPDATE;
|
|
int update = 0;
|
|
|
|
mutex_lock(&battery->mutex);
|
|
|
|
update = (get_seconds() - battery->update_time[fid] >= update_time);
|
|
update = (update | battery->flags.update[fid]);
|
|
|
|
result = acpi_battery_update(battery, update, &update_result);
|
|
if (result)
|
|
goto end;
|
|
|
|
if (update_result == ACPI_BATTERY_EASY_UPDATE) {
|
|
result = acpi_read_funcs[fid].get(battery);
|
|
if (result)
|
|
goto end;
|
|
}
|
|
|
|
end:
|
|
result = acpi_read_funcs[fid].print(seq, result);
|
|
acpi_battery_check_result(battery, result);
|
|
battery->flags.update[fid] = result;
|
|
mutex_unlock(&battery->mutex);
|
|
return result;
|
|
}
|
|
|
|
static int acpi_battery_read_info(struct seq_file *seq, void *offset)
|
|
{
|
|
return acpi_battery_read(ACPI_BATTERY_INFO, seq);
|
|
}
|
|
|
|
static int acpi_battery_read_state(struct seq_file *seq, void *offset)
|
|
{
|
|
return acpi_battery_read(ACPI_BATTERY_STATE, seq);
|
|
}
|
|
|
|
static int acpi_battery_read_alarm(struct seq_file *seq, void *offset)
|
|
{
|
|
return acpi_battery_read(ACPI_BATTERY_ALARM, seq);
|
|
}
|
|
|
|
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_state_open_fs(struct inode *inode, struct file *file)
|
|
{
|
|
return single_open(file, acpi_battery_read_state, PDE(inode)->data);
|
|
}
|
|
|
|
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 battery_file {
|
|
struct file_operations ops;
|
|
mode_t mode;
|
|
char *name;
|
|
} acpi_battery_file[] = {
|
|
{
|
|
.name = "info",
|
|
.mode = S_IRUGO,
|
|
.ops = {
|
|
.open = acpi_battery_info_open_fs,
|
|
.read = seq_read,
|
|
.llseek = seq_lseek,
|
|
.release = single_release,
|
|
.owner = THIS_MODULE,
|
|
},
|
|
},
|
|
{
|
|
.name = "state",
|
|
.mode = S_IRUGO,
|
|
.ops = {
|
|
.open = acpi_battery_state_open_fs,
|
|
.read = seq_read,
|
|
.llseek = seq_lseek,
|
|
.release = single_release,
|
|
.owner = THIS_MODULE,
|
|
},
|
|
},
|
|
{
|
|
.name = "alarm",
|
|
.mode = S_IFREG | S_IRUGO | S_IWUSR,
|
|
.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;
|
|
int i;
|
|
|
|
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;
|
|
}
|
|
|
|
for (i = 0; i < ACPI_BATTERY_NUMFILES; ++i) {
|
|
entry = create_proc_entry(acpi_battery_file[i].name,
|
|
acpi_battery_file[i].mode, acpi_device_dir(device));
|
|
if (!entry)
|
|
return -ENODEV;
|
|
else {
|
|
entry->proc_fops = &acpi_battery_file[i].ops;
|
|
entry->data = acpi_driver_data(device);
|
|
entry->owner = THIS_MODULE;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int acpi_battery_remove_fs(struct acpi_device *device)
|
|
{
|
|
int i;
|
|
if (acpi_device_dir(device)) {
|
|
for (i = 0; i < ACPI_BATTERY_NUMFILES; ++i) {
|
|
remove_proc_entry(acpi_battery_file[i].name,
|
|
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:
|
|
device = battery->device;
|
|
acpi_battery_notify_update(battery);
|
|
acpi_bus_generate_event(device, event,
|
|
acpi_battery_present(battery));
|
|
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 = kzalloc(sizeof(struct acpi_battery), GFP_KERNEL);
|
|
if (!battery)
|
|
return -ENOMEM;
|
|
|
|
mutex_init(&battery->mutex);
|
|
|
|
mutex_lock(&battery->mutex);
|
|
|
|
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_get_status(battery);
|
|
if (result)
|
|
goto end;
|
|
|
|
battery->flags.init_update = 1;
|
|
|
|
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)) {
|
|
ACPI_EXCEPTION((AE_INFO, status, "Installing notify handler"));
|
|
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);
|
|
}
|
|
|
|
mutex_unlock(&battery->mutex);
|
|
|
|
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);
|
|
|
|
mutex_lock(&battery->mutex);
|
|
|
|
status = acpi_remove_notify_handler(device->handle,
|
|
ACPI_ALL_NOTIFY,
|
|
acpi_battery_notify);
|
|
|
|
acpi_battery_remove_fs(device);
|
|
|
|
kfree(battery->bif_data.pointer);
|
|
|
|
kfree(battery->bst_data.pointer);
|
|
|
|
mutex_unlock(&battery->mutex);
|
|
|
|
mutex_destroy(&battery->mutex);
|
|
|
|
kfree(battery);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* this is needed to learn about changes made in suspended state */
|
|
static int acpi_battery_resume(struct acpi_device *device)
|
|
{
|
|
struct acpi_battery *battery;
|
|
|
|
if (!device)
|
|
return -EINVAL;
|
|
|
|
battery = device->driver_data;
|
|
|
|
battery->flags.init_update = 1;
|
|
|
|
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);
|