[deliverable/linux.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>
#include <acpi/acmacros.h>
#include <acpi/actypes.h>
#include <acpi/acutils.h>

ACPI_MODULE_NAME("cm_sbs")
#define ACPI_AC_CLASS		"ac_adapter"
#define ACPI_BATTERY_CLASS	"battery"
#define ACPI_SBS_COMPONENT	0x00080000
#define _COMPONENT		ACPI_SBS_COMPONENT
static struct proc_dir_entry *acpi_ac_dir;
static struct proc_dir_entry *acpi_battery_dir;

static struct semaphore cm_sbs_sem;

static int lock_ac_dir_cnt = 0;
static int lock_battery_dir_cnt = 0;

struct proc_dir_entry *acpi_lock_ac_dir(void)
{

	down(&cm_sbs_sem);
	if (!acpi_ac_dir) {
		acpi_ac_dir = proc_mkdir(ACPI_AC_CLASS, acpi_root_dir);
	}
	if (acpi_ac_dir) {
		lock_ac_dir_cnt++;
	} else {
		ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
				  "Cannot create %s\n", ACPI_AC_CLASS));
	}
	up(&cm_sbs_sem);
	return acpi_ac_dir;
}

EXPORT_SYMBOL(acpi_lock_ac_dir);

void acpi_unlock_ac_dir(struct proc_dir_entry *acpi_ac_dir_param)
{

	down(&cm_sbs_sem);
	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 = 0;
	}
	up(&cm_sbs_sem);
}

EXPORT_SYMBOL(acpi_unlock_ac_dir);

struct proc_dir_entry *acpi_lock_battery_dir(void)
{

	down(&cm_sbs_sem);
	if (!acpi_battery_dir) {
		acpi_battery_dir =
		    proc_mkdir(ACPI_BATTERY_CLASS, acpi_root_dir);
	}
	if (acpi_battery_dir) {
		lock_battery_dir_cnt++;
	} else {
		ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
				  "Cannot create %s\n", ACPI_BATTERY_CLASS));
	}
	up(&cm_sbs_sem);
	return acpi_battery_dir;
}

EXPORT_SYMBOL(acpi_lock_battery_dir);

void acpi_unlock_battery_dir(struct proc_dir_entry *acpi_battery_dir_param)
{

	down(&cm_sbs_sem);
	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 = 0;
	}
	up(&cm_sbs_sem);
	return;
}

EXPORT_SYMBOL(acpi_unlock_battery_dir);

static int __init acpi_cm_sbs_init(void)
{

	if (acpi_disabled)
		return 0;

	init_MUTEX(&cm_sbs_sem);

	return 0;
}

subsys_initcall(acpi_cm_sbs_init);
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>
	30	#include <acpi/acmacros.h>
	31	#include <acpi/actypes.h>
	32	#include <acpi/acutils.h>
	33
	34	ACPI_MODULE_NAME("cm_sbs")
	35	#define ACPI_AC_CLASS "ac_adapter"
	36	#define ACPI_BATTERY_CLASS "battery"
	37	#define ACPI_SBS_COMPONENT 0x00080000
	38	#define _COMPONENT ACPI_SBS_COMPONENT
	39	static struct proc_dir_entry *acpi_ac_dir;
	40	static struct proc_dir_entry *acpi_battery_dir;
	41
	42	static struct semaphore cm_sbs_sem;
	43
	44	static int lock_ac_dir_cnt = 0;
	45	static int lock_battery_dir_cnt = 0;
	46
	47	struct proc_dir_entry *acpi_lock_ac_dir(void)
	48	{
3f86b832 RT	49
	50	down(&cm_sbs_sem);
	51	if (!acpi_ac_dir) {
	52	acpi_ac_dir = proc_mkdir(ACPI_AC_CLASS, acpi_root_dir);
	53	}
	54	if (acpi_ac_dir) {
	55	lock_ac_dir_cnt++;
	56	} else {
	57	ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
	58	"Cannot create %s\n", ACPI_AC_CLASS));
	59	}
	60	up(&cm_sbs_sem);
635227ee	61	return acpi_ac_dir;
3f86b832 RT	62	}
	63
	64	EXPORT_SYMBOL(acpi_lock_ac_dir);
	65
	66	void acpi_unlock_ac_dir(struct proc_dir_entry *acpi_ac_dir_param)
	67	{
3f86b832 RT	68
	69	down(&cm_sbs_sem);
	70	if (acpi_ac_dir_param) {
	71	lock_ac_dir_cnt--;
	72	}
	73	if (lock_ac_dir_cnt == 0 && acpi_ac_dir_param && acpi_ac_dir) {
	74	remove_proc_entry(ACPI_AC_CLASS, acpi_root_dir);
	75	acpi_ac_dir = 0;
	76	}
	77	up(&cm_sbs_sem);
	78	}
	79
	80	EXPORT_SYMBOL(acpi_unlock_ac_dir);
	81
	82	struct proc_dir_entry *acpi_lock_battery_dir(void)
	83	{
3f86b832 RT	84
	85	down(&cm_sbs_sem);
	86	if (!acpi_battery_dir) {
	87	acpi_battery_dir =
	88	proc_mkdir(ACPI_BATTERY_CLASS, acpi_root_dir);
	89	}
	90	if (acpi_battery_dir) {
	91	lock_battery_dir_cnt++;
	92	} else {
	93	ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
	94	"Cannot create %s\n", ACPI_BATTERY_CLASS));
	95	}
	96	up(&cm_sbs_sem);
635227ee	97	return acpi_battery_dir;
3f86b832 RT	98	}
	99
	100	EXPORT_SYMBOL(acpi_lock_battery_dir);
	101
	102	void acpi_unlock_battery_dir(struct proc_dir_entry *acpi_battery_dir_param)
	103	{
3f86b832 RT	104
	105	down(&cm_sbs_sem);
	106	if (acpi_battery_dir_param) {
	107	lock_battery_dir_cnt--;
	108	}
	109	if (lock_battery_dir_cnt == 0 && acpi_battery_dir_param
	110	&& acpi_battery_dir) {
	111	remove_proc_entry(ACPI_BATTERY_CLASS, acpi_root_dir);
	112	acpi_battery_dir = 0;
	113	}
	114	up(&cm_sbs_sem);
635227ee	115	return;
3f86b832 RT	116	}
	117
	118	EXPORT_SYMBOL(acpi_unlock_battery_dir);
	119
	120	static int __init acpi_cm_sbs_init(void)
	121	{
3f86b832 RT	122
3f86b832 RT	123	if (acpi_disabled)
635227ee	124	return 0;
3f86b832 RT	125
	126	init_MUTEX(&cm_sbs_sem);
	127
635227ee	128	return 0;
3f86b832 RT	129	}
	130
	131	subsys_initcall(acpi_cm_sbs_init);