106 lines
3.0 KiB
C
106 lines
3.0 KiB
C
/*
|
|
* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
*
|
|
* 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/acpi.h>
|
|
#include <linux/types.h>
|
|
#include <linux/proc_fs.h>
|
|
#include <linux/seq_file.h>
|
|
#include <acpi/acpi_bus.h>
|
|
#include <acpi/acpi_drivers.h>
|
|
|
|
#define PREFIX "ACPI: "
|
|
|
|
ACPI_MODULE_NAME("cm_sbs");
|
|
#define ACPI_AC_CLASS "ac_adapter"
|
|
#define ACPI_BATTERY_CLASS "battery"
|
|
#define _COMPONENT ACPI_SBS_COMPONENT
|
|
static struct proc_dir_entry *acpi_ac_dir;
|
|
static struct proc_dir_entry *acpi_battery_dir;
|
|
|
|
static DEFINE_MUTEX(cm_sbs_mutex);
|
|
|
|
static int lock_ac_dir_cnt;
|
|
static int lock_battery_dir_cnt;
|
|
|
|
struct proc_dir_entry *acpi_lock_ac_dir(void)
|
|
{
|
|
mutex_lock(&cm_sbs_mutex);
|
|
if (!acpi_ac_dir)
|
|
acpi_ac_dir = proc_mkdir(ACPI_AC_CLASS, acpi_root_dir);
|
|
if (acpi_ac_dir) {
|
|
lock_ac_dir_cnt++;
|
|
} else {
|
|
printk(KERN_ERR PREFIX
|
|
"Cannot create %s\n", ACPI_AC_CLASS);
|
|
}
|
|
mutex_unlock(&cm_sbs_mutex);
|
|
return acpi_ac_dir;
|
|
}
|
|
EXPORT_SYMBOL(acpi_lock_ac_dir);
|
|
|
|
void acpi_unlock_ac_dir(struct proc_dir_entry *acpi_ac_dir_param)
|
|
{
|
|
mutex_lock(&cm_sbs_mutex);
|
|
if (acpi_ac_dir_param)
|
|
lock_ac_dir_cnt--;
|
|
if (lock_ac_dir_cnt == 0 && acpi_ac_dir_param && acpi_ac_dir) {
|
|
remove_proc_entry(ACPI_AC_CLASS, acpi_root_dir);
|
|
acpi_ac_dir = NULL;
|
|
}
|
|
mutex_unlock(&cm_sbs_mutex);
|
|
}
|
|
EXPORT_SYMBOL(acpi_unlock_ac_dir);
|
|
|
|
struct proc_dir_entry *acpi_lock_battery_dir(void)
|
|
{
|
|
mutex_lock(&cm_sbs_mutex);
|
|
if (!acpi_battery_dir) {
|
|
acpi_battery_dir =
|
|
proc_mkdir(ACPI_BATTERY_CLASS, acpi_root_dir);
|
|
}
|
|
if (acpi_battery_dir) {
|
|
lock_battery_dir_cnt++;
|
|
} else {
|
|
printk(KERN_ERR PREFIX
|
|
"Cannot create %s\n", ACPI_BATTERY_CLASS);
|
|
}
|
|
mutex_unlock(&cm_sbs_mutex);
|
|
return acpi_battery_dir;
|
|
}
|
|
EXPORT_SYMBOL(acpi_lock_battery_dir);
|
|
|
|
void acpi_unlock_battery_dir(struct proc_dir_entry *acpi_battery_dir_param)
|
|
{
|
|
mutex_lock(&cm_sbs_mutex);
|
|
if (acpi_battery_dir_param)
|
|
lock_battery_dir_cnt--;
|
|
if (lock_battery_dir_cnt == 0 && acpi_battery_dir_param
|
|
&& acpi_battery_dir) {
|
|
remove_proc_entry(ACPI_BATTERY_CLASS, acpi_root_dir);
|
|
acpi_battery_dir = NULL;
|
|
}
|
|
mutex_unlock(&cm_sbs_mutex);
|
|
return;
|
|
}
|
|
EXPORT_SYMBOL(acpi_unlock_battery_dir);
|