[linux-2.6-block.git] / drivers / acpi / cm_sbs.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>

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);
Commit	Line	Data
3f86b832 RT	1	/*
	2	* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
	3	*
	4	* This program is free software; you can redistribute it and/or modify
	5	* it under the terms of the GNU General Public License as published by
	6	* the Free Software Foundation; either version 2 of the License, or (at
	7	* your option) any later version.
	8	*
	9	* This program is distributed in the hope that it will be useful, but
	10	* WITHOUT ANY WARRANTY; without even the implied warranty of
	11	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	12	* General Public License for more details.
	13	*
	14	* You should have received a copy of the GNU General Public License along
	15	* with this program; if not, write to the Free Software Foundation, Inc.,
	16	* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
	17	*
	18	* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
	19	*/
	20
	21	#include <linux/kernel.h>
	22	#include <linux/module.h>
	23	#include <linux/init.h>
	24	#include <linux/acpi.h>
	25	#include <linux/types.h>
	26	#include <linux/proc_fs.h>
	27	#include <linux/seq_file.h>
	28	#include <acpi/acpi_bus.h>
	29	#include <acpi/acpi_drivers.h>
3f86b832	30
f52fd66d	31	ACPI_MODULE_NAME("cm_sbs");
3f86b832 RT	32	#define ACPI_AC_CLASS "ac_adapter"
3f86b832 RT	33	#define ACPI_BATTERY_CLASS "battery"
3f86b832 RT	34	#define _COMPONENT ACPI_SBS_COMPONENT
	35	static struct proc_dir_entry *acpi_ac_dir;
	36	static struct proc_dir_entry *acpi_battery_dir;
	37
8970bfe7	38	static DEFINE_MUTEX(cm_sbs_mutex);
3f86b832	39
8970bfe7 AM	40	static int lock_ac_dir_cnt;
8970bfe7 AM	41	static int lock_battery_dir_cnt;
3f86b832 RT	42
	43	struct proc_dir_entry *acpi_lock_ac_dir(void)
	44	{
8970bfe7 AM	45	mutex_lock(&cm_sbs_mutex);
8970bfe7 AM	46	if (!acpi_ac_dir)
3f86b832	47	acpi_ac_dir = proc_mkdir(ACPI_AC_CLASS, acpi_root_dir);
3f86b832 RT	48	if (acpi_ac_dir) {
	49	lock_ac_dir_cnt++;
	50	} else {
55ac9a01 LM	51	printk(KERN_ERR PREFIX
55ac9a01 LM	52	"Cannot create %s\n", ACPI_AC_CLASS);
3f86b832	53	}
8970bfe7	54	mutex_unlock(&cm_sbs_mutex);
635227ee	55	return acpi_ac_dir;
3f86b832	56	}
3f86b832 RT	57	EXPORT_SYMBOL(acpi_lock_ac_dir);
	58
	59	void acpi_unlock_ac_dir(struct proc_dir_entry *acpi_ac_dir_param)
	60	{
8970bfe7 AM	61	mutex_lock(&cm_sbs_mutex);
8970bfe7 AM	62	if (acpi_ac_dir_param)
3f86b832	63	lock_ac_dir_cnt--;
3f86b832 RT	64	if (lock_ac_dir_cnt == 0 && acpi_ac_dir_param && acpi_ac_dir) {
3f86b832 RT	65	remove_proc_entry(ACPI_AC_CLASS, acpi_root_dir);
4370df97	66	acpi_ac_dir = NULL;
3f86b832	67	}
8970bfe7	68	mutex_unlock(&cm_sbs_mutex);
3f86b832	69	}
3f86b832 RT	70	EXPORT_SYMBOL(acpi_unlock_ac_dir);
	71
	72	struct proc_dir_entry *acpi_lock_battery_dir(void)
	73	{
8970bfe7	74	mutex_lock(&cm_sbs_mutex);
3f86b832 RT	75	if (!acpi_battery_dir) {
	76	acpi_battery_dir =
	77	proc_mkdir(ACPI_BATTERY_CLASS, acpi_root_dir);
	78	}
	79	if (acpi_battery_dir) {
	80	lock_battery_dir_cnt++;
	81	} else {
55ac9a01 LM	82	printk(KERN_ERR PREFIX
55ac9a01 LM	83	"Cannot create %s\n", ACPI_BATTERY_CLASS);
3f86b832	84	}
8970bfe7	85	mutex_unlock(&cm_sbs_mutex);
635227ee	86	return acpi_battery_dir;
3f86b832	87	}
3f86b832 RT	88	EXPORT_SYMBOL(acpi_lock_battery_dir);
	89
	90	void acpi_unlock_battery_dir(struct proc_dir_entry *acpi_battery_dir_param)
	91	{
8970bfe7 AM	92	mutex_lock(&cm_sbs_mutex);
8970bfe7 AM	93	if (acpi_battery_dir_param)
3f86b832	94	lock_battery_dir_cnt--;
3f86b832 RT	95	if (lock_battery_dir_cnt == 0 && acpi_battery_dir_param
	96	&& acpi_battery_dir) {
	97	remove_proc_entry(ACPI_BATTERY_CLASS, acpi_root_dir);
4370df97	98	acpi_battery_dir = NULL;
3f86b832	99	}
8970bfe7	100	mutex_unlock(&cm_sbs_mutex);
635227ee	101	return;
3f86b832	102	}
3f86b832	103	EXPORT_SYMBOL(acpi_unlock_battery_dir);