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/*****************************************************************************
*
* Module Name: ac_osl.c
* $Revision: 10 $
*
*****************************************************************************/
/*
* 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
*/
#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 "ac.h"
MODULE_AUTHOR("Andrew Grover");
MODULE_DESCRIPTION("ACPI Component Architecture (CA) - AC Adapter Driver");
MODULE_LICENSE("GPL");
#define AC_PROC_ROOT "ac_adapter"
#define AC_PROC_STATUS "status"
#define AC_ON_LINE "on-line"
#define AC_OFF_LINE "off-line"
extern struct proc_dir_entry *bm_proc_root;
static struct proc_dir_entry *ac_proc_root = NULL;
/****************************************************************************
*
* FUNCTION: ac_osl_proc_read_status
*
****************************************************************************/
static int
ac_osl_proc_read_status (
char *page,
char **start,
off_t off,
int count,
int *eof,
void *context)
{
acpi_status status = AE_OK;
AC_CONTEXT *ac_adapter = NULL;
char *p = page;
int len;
if (!context) {
goto end;
}
ac_adapter = (AC_CONTEXT*)context;
/* don't get status more than once for a single proc read */
if (off != 0) {
goto end;
}
status = bm_evaluate_simple_integer(ac_adapter->acpi_handle,
"_PSR", &(ac_adapter->is_online));
if (ACPI_FAILURE(status)) {
p += sprintf(p, "Error reading AC Adapter status\n");
goto end;
}
if (ac_adapter->is_online) {
p += sprintf(p, "Status: %s\n",
AC_ON_LINE);
}
else {
p += sprintf(p, "Status: %s\n",
AC_OFF_LINE);
}
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;
return(len);
}
/****************************************************************************
*
* FUNCTION: ac_osl_add_device
*
****************************************************************************/
acpi_status
ac_osl_add_device(
AC_CONTEXT *ac_adapter)
{
struct proc_dir_entry *proc_entry = NULL;
if (!ac_adapter) {
return(AE_BAD_PARAMETER);
}
printk(KERN_INFO "ACPI: AC Adapter found\n");
proc_entry = proc_mkdir(ac_adapter->uid, ac_proc_root);
if (!proc_entry) {
return(AE_ERROR);
}
create_proc_read_entry(AC_PROC_STATUS, S_IFREG | S_IRUGO,
proc_entry, ac_osl_proc_read_status, (void*)ac_adapter);
return(AE_OK);
}
/****************************************************************************
*
* FUNCTION: ac_osl_remove_device
*
****************************************************************************/
acpi_status
ac_osl_remove_device (
AC_CONTEXT *ac_adapter)
{
char proc_entry[64];
if (!ac_adapter) {
return(AE_BAD_PARAMETER);
}
sprintf(proc_entry, "%s/%s", ac_adapter->uid, AC_PROC_STATUS);
remove_proc_entry(proc_entry, ac_proc_root);
sprintf(proc_entry, "%s", ac_adapter->uid);
remove_proc_entry(proc_entry, ac_proc_root);
return(AE_OK);
}
/****************************************************************************
*
* FUNCTION: ac_osl_generate_event
*
****************************************************************************/
acpi_status
ac_osl_generate_event (
u32 event,
AC_CONTEXT *ac_adapter)
{
acpi_status status = AE_OK;
if (!ac_adapter) {
return(AE_BAD_PARAMETER);
}
switch (event) {
case AC_NOTIFY_STATUS_CHANGE:
status = bm_osl_generate_event(ac_adapter->device_handle,
AC_PROC_ROOT, ac_adapter->uid, event, 0);
break;
default:
return(AE_BAD_PARAMETER);
break;
}
return(status);
}
/****************************************************************************
*
* FUNCTION: ac_osl_init
*
* PARAMETERS: <none>
*
* RETURN: 0: Success
*
* DESCRIPTION: Module initialization.
*
****************************************************************************/
static int __init
ac_osl_init (void)
{
acpi_status status = AE_OK;
ac_proc_root = proc_mkdir(AC_PROC_ROOT, bm_proc_root);
if (!ac_proc_root) {
status = AE_ERROR;
}
else {
status = ac_initialize();
if (ACPI_FAILURE(status)) {
remove_proc_entry(AC_PROC_ROOT, bm_proc_root);
}
}
return (ACPI_SUCCESS(status)) ? 0 : -ENODEV;
}
/****************************************************************************
*
* FUNCTION: ac_osl_cleanup
*
* PARAMETERS: <none>
*
* RETURN: <none>
*
* DESCRIPTION: Module cleanup.
*
****************************************************************************/
static void __exit
ac_osl_cleanup (void)
{
ac_terminate();
if (ac_proc_root) {
remove_proc_entry(AC_PROC_ROOT, bm_proc_root);
}
return;
}
module_init(ac_osl_init);
module_exit(ac_osl_cleanup);
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