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/******************************************************************************
*
* Module Name: bt_osl.c
* $Revision: 24 $
*
*****************************************************************************/
/*
* Copyright (C) 2000, 2001 Andrew Grover
*
* 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
*/
/*
* Changes:
* Brendan Burns <bburns@wso.williams.edu> 2000-11-15
* - added proc battery interface
* - parse returned data from _BST and _BIF
* Andy Grover <andrew.grover@intel.com> 2000-12-8
* - improved proc interface
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/types.h>
#include <linux/proc_fs.h>
#include <acpi.h>
#include "bt.h"
MODULE_AUTHOR("Andrew Grover");
MODULE_DESCRIPTION("ACPI Component Architecture (CA) - Control Method Battery Driver");
MODULE_LICENSE("GPL");
#define BT_PROC_ROOT "battery"
#define BT_PROC_STATUS "status"
#define BT_PROC_INFO "info"
extern struct proc_dir_entry *bm_proc_root;
static struct proc_dir_entry *bt_proc_root = NULL;
/****************************************************************************
*
* FUNCTION: bt_osl_proc_read_info
*
****************************************************************************/
static int
bt_osl_proc_read_info (
char *page,
char **start,
off_t off,
int count,
int *eof,
void *context)
{
BT_CONTEXT *battery = NULL;
BT_BATTERY_INFO *battery_info = NULL;
char *p = page;
int len = 0;
if (!context || (off != 0)) {
goto end;
}
battery = (BT_CONTEXT*)context;
/*
* Battery Present?
* ----------------
*/
if (!battery->is_present) {
p += sprintf(p, "Present: no\n");
goto end;
}
else {
p += sprintf(p, "Present: yes\n");
}
/*
* Get Battery Information:
* ------------------------
*/
if (ACPI_FAILURE(bt_get_info(battery, &battery_info))) {
p += sprintf(p, "Error reading battery information (_BIF)\n");
goto end;
}
if (battery_info->design_capacity == BT_UNKNOWN) {
p += sprintf(p, "Design Capacity: unknown\n");
}
else {
p += sprintf(p, "Design Capacity: %d %sh\n",
(u32)battery_info->design_capacity,
battery->power_units);
}
if (battery_info->last_full_capacity == BT_UNKNOWN) {
p += sprintf(p, "Last Full Capacity: unknown\n");
}
else {
p += sprintf(p, "Last Full Capacity: %d %sh\n",
(u32)battery_info->last_full_capacity,
battery->power_units);
}
if (battery_info->battery_technology == 0) {
p += sprintf(p, "Battery Technology: primary (non-rechargeable)\n");
}
else if (battery_info->battery_technology == 1) {
p += sprintf(p, "Battery Technology: secondary (rechargeable)\n");
}
else {
p += sprintf(p, "Battery Technology: unknown\n");
}
if (battery_info->design_voltage == BT_UNKNOWN) {
p += sprintf(p, "Design Voltage: unknown\n");
}
else {
p += sprintf(p, "Design Voltage: %d mV\n",
(u32)battery_info->design_voltage);
}
p += sprintf(p, "Design Capacity Warning: %d %sh\n",
(u32)battery_info->design_capacity_warning,
battery->power_units);
p += sprintf(p, "Design Capacity Low: %d %sh\n",
(u32)battery_info->design_capacity_low,
battery->power_units);
p += sprintf(p, "Capacity Granularity 1: %d %sh\n",
(u32)battery_info->battery_capacity_granularity_1,
battery->power_units);
p += sprintf(p, "Capacity Granularity 2: %d %sh\n",
(u32)battery_info->battery_capacity_granularity_2,
battery->power_units);
p += sprintf(p, "Model Number: %s\n",
battery_info->model_number);
p += sprintf(p, "Serial Number: %s\n",
battery_info->serial_number);
p += sprintf(p, "Battery Type: %s\n",
battery_info->battery_type);
p += sprintf(p, "OEM Info: %s\n",
battery_info->oem_info);
end:
len = (p - page);
if (len <= off+count) *eof = 1;
*start = page + off;
len -= off;
if (len>count) len = count;
if (len<0) len = 0;
acpi_os_free(battery_info);
return(len);
}
/****************************************************************************
*
* FUNCTION: bt_osl_proc_read_status
*
****************************************************************************/
static int
bt_osl_proc_read_status (
char *page,
char **start,
off_t off,
int count,
int *eof,
void *context)
{
BT_CONTEXT *battery = NULL;
BT_BATTERY_STATUS *battery_status = NULL;
char *p = page;
int len = 0;
if (!context || (off != 0)) {
goto end;
}
battery = (BT_CONTEXT*)context;
/*
* Battery Present?
* ----------------
*/
if (!battery->is_present) {
p += sprintf(p, "Present: no\n");
goto end;
}
else {
p += sprintf(p, "Present: yes\n");
}
/*
* Get Battery Status:
* -------------------
*/
if (ACPI_FAILURE(bt_get_status(battery, &battery_status))) {
p += sprintf(p, "Error reading battery status (_BST)\n");
goto end;
}
/*
* Store Data:
* -----------
*/
if (!battery_status->state) {
p += sprintf(p, "State: ok\n");
}
else {
if (battery_status->state & 0x1)
p += sprintf(p, "State: discharging\n");
if (battery_status->state & 0x2)
p += sprintf(p, "State: charging\n");
if (battery_status->state & 0x4)
p += sprintf(p, "State: critically low\n");
}
if (battery_status->present_rate == BT_UNKNOWN) {
p += sprintf(p, "Present Rate: unknown\n");
}
else {
p += sprintf(p, "Present Rate: %d %s\n",
(u32)battery_status->present_rate,
battery->power_units);
}
if (battery_status->remaining_capacity == BT_UNKNOWN) {
p += sprintf(p, "Remaining Capacity: unknown\n");
}
else {
p += sprintf(p, "Remaining Capacity: %d %sh\n",
(u32)battery_status->remaining_capacity,
battery->power_units);
}
if (battery_status->present_voltage == BT_UNKNOWN) {
p += sprintf(p, "Battery Voltage: unknown\n");
}
else {
p += sprintf(p, "Battery Voltage: %d mV\n",
(u32)battery_status->present_voltage);
}
end:
len = (p - page);
if (len <= off+count) *eof = 1;
*start = page + off;
len -= off;
if (len>count) len = count;
if (len<0) len = 0;
acpi_os_free(battery_status);
return(len);
}
/****************************************************************************
*
* FUNCTION: bt_osl_add_device
*
****************************************************************************/
acpi_status
bt_osl_add_device(
BT_CONTEXT *battery)
{
struct proc_dir_entry *proc_entry = NULL;
if (!battery) {
return(AE_BAD_PARAMETER);
}
if (battery->is_present) {
printk("ACPI: Battery socket found, battery present\n");
}
else {
printk("ACPI: Battery socket found, battery absent\n");
}
proc_entry = proc_mkdir(battery->uid, bt_proc_root);
if (!proc_entry) {
return(AE_ERROR);
}
create_proc_read_entry(BT_PROC_STATUS, S_IFREG | S_IRUGO,
proc_entry, bt_osl_proc_read_status, (void*)battery);
create_proc_read_entry(BT_PROC_INFO, S_IFREG | S_IRUGO,
proc_entry, bt_osl_proc_read_info, (void*)battery);
return(AE_OK);
}
/****************************************************************************
*
* FUNCTION: bt_osl_remove_device
*
****************************************************************************/
acpi_status
bt_osl_remove_device (
BT_CONTEXT *battery)
{
char proc_entry[64];
if (!battery) {
return(AE_BAD_PARAMETER);
}
sprintf(proc_entry, "%s/%s", battery->uid, BT_PROC_INFO);
remove_proc_entry(proc_entry, bt_proc_root);
sprintf(proc_entry, "%s/%s", battery->uid, BT_PROC_STATUS);
remove_proc_entry(proc_entry, bt_proc_root);
sprintf(proc_entry, "%s", battery->uid);
remove_proc_entry(proc_entry, bt_proc_root);
return(AE_OK);
}
/****************************************************************************
*
* FUNCTION: bt_osl_generate_event
*
****************************************************************************/
acpi_status
bt_osl_generate_event (
u32 event,
BT_CONTEXT *battery)
{
acpi_status status = AE_OK;
if (!battery) {
return(AE_BAD_PARAMETER);
}
switch (event) {
case BT_NOTIFY_STATUS_CHANGE:
case BT_NOTIFY_INFORMATION_CHANGE:
status = bm_osl_generate_event(battery->device_handle,
BT_PROC_ROOT, battery->uid, event, 0);
break;
default:
return(AE_BAD_PARAMETER);
break;
}
return(status);
}
/****************************************************************************
*
* FUNCTION: bt_osl_init
*
* PARAMETERS: <none>
*
* RETURN: 0: Success
*
* DESCRIPTION: Module initialization.
*
****************************************************************************/
static int __init
bt_osl_init (void)
{
acpi_status status = AE_OK;
/* abort if no busmgr */
if (!bm_proc_root)
return -ENODEV;
bt_proc_root = proc_mkdir(BT_PROC_ROOT, bm_proc_root);
if (!bt_proc_root) {
status = AE_ERROR;
}
else {
status = bt_initialize();
if (ACPI_FAILURE(status)) {
remove_proc_entry(BT_PROC_ROOT, bm_proc_root);
}
}
return (ACPI_SUCCESS(status)) ? 0 : -ENODEV;
}
/****************************************************************************
*
* FUNCTION: bt_osl_cleanup
*
* PARAMETERS: <none>
*
* RETURN: <none>
*
* DESCRIPTION: Module cleanup.
*
****************************************************************************/
static void __exit
bt_osl_cleanup (void)
{
bt_terminate();
if (bt_proc_root) {
remove_proc_entry(BT_PROC_ROOT, bm_proc_root);
}
return;
}
module_init(bt_osl_init);
module_exit(bt_osl_cleanup);
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