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