blob: 4a9b7bf6f44ed79a3fff799c3a5245ed49f273a6 [file] [log] [blame]
Rich Townsend3f86b832006-07-01 11:36:54 -04001/*
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
34ACPI_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
39static struct proc_dir_entry *acpi_ac_dir;
40static struct proc_dir_entry *acpi_battery_dir;
41
Andrew Morton8970bfe2006-07-10 02:34:45 -040042static DEFINE_MUTEX(cm_sbs_mutex);
Rich Townsend3f86b832006-07-01 11:36:54 -040043
Andrew Morton8970bfe2006-07-10 02:34:45 -040044static int lock_ac_dir_cnt;
45static int lock_battery_dir_cnt;
Rich Townsend3f86b832006-07-01 11:36:54 -040046
47struct proc_dir_entry *acpi_lock_ac_dir(void)
48{
Andrew Morton8970bfe2006-07-10 02:34:45 -040049 mutex_lock(&cm_sbs_mutex);
50 if (!acpi_ac_dir)
Rich Townsend3f86b832006-07-01 11:36:54 -040051 acpi_ac_dir = proc_mkdir(ACPI_AC_CLASS, acpi_root_dir);
Rich Townsend3f86b832006-07-01 11:36:54 -040052 if (acpi_ac_dir) {
53 lock_ac_dir_cnt++;
54 } else {
55 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
56 "Cannot create %s\n", ACPI_AC_CLASS));
57 }
Andrew Morton8970bfe2006-07-10 02:34:45 -040058 mutex_unlock(&cm_sbs_mutex);
Len Brown635227e2006-07-01 16:48:23 -040059 return acpi_ac_dir;
Rich Townsend3f86b832006-07-01 11:36:54 -040060}
Rich Townsend3f86b832006-07-01 11:36:54 -040061EXPORT_SYMBOL(acpi_lock_ac_dir);
62
63void acpi_unlock_ac_dir(struct proc_dir_entry *acpi_ac_dir_param)
64{
Andrew Morton8970bfe2006-07-10 02:34:45 -040065 mutex_lock(&cm_sbs_mutex);
66 if (acpi_ac_dir_param)
Rich Townsend3f86b832006-07-01 11:36:54 -040067 lock_ac_dir_cnt--;
Rich Townsend3f86b832006-07-01 11:36:54 -040068 if (lock_ac_dir_cnt == 0 && acpi_ac_dir_param && acpi_ac_dir) {
69 remove_proc_entry(ACPI_AC_CLASS, acpi_root_dir);
Al Viro4370df92006-10-10 22:47:17 +010070 acpi_ac_dir = NULL;
Rich Townsend3f86b832006-07-01 11:36:54 -040071 }
Andrew Morton8970bfe2006-07-10 02:34:45 -040072 mutex_unlock(&cm_sbs_mutex);
Rich Townsend3f86b832006-07-01 11:36:54 -040073}
Rich Townsend3f86b832006-07-01 11:36:54 -040074EXPORT_SYMBOL(acpi_unlock_ac_dir);
75
76struct proc_dir_entry *acpi_lock_battery_dir(void)
77{
Andrew Morton8970bfe2006-07-10 02:34:45 -040078 mutex_lock(&cm_sbs_mutex);
Rich Townsend3f86b832006-07-01 11:36:54 -040079 if (!acpi_battery_dir) {
80 acpi_battery_dir =
81 proc_mkdir(ACPI_BATTERY_CLASS, acpi_root_dir);
82 }
83 if (acpi_battery_dir) {
84 lock_battery_dir_cnt++;
85 } else {
86 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
87 "Cannot create %s\n", ACPI_BATTERY_CLASS));
88 }
Andrew Morton8970bfe2006-07-10 02:34:45 -040089 mutex_unlock(&cm_sbs_mutex);
Len Brown635227e2006-07-01 16:48:23 -040090 return acpi_battery_dir;
Rich Townsend3f86b832006-07-01 11:36:54 -040091}
Rich Townsend3f86b832006-07-01 11:36:54 -040092EXPORT_SYMBOL(acpi_lock_battery_dir);
93
94void acpi_unlock_battery_dir(struct proc_dir_entry *acpi_battery_dir_param)
95{
Andrew Morton8970bfe2006-07-10 02:34:45 -040096 mutex_lock(&cm_sbs_mutex);
97 if (acpi_battery_dir_param)
Rich Townsend3f86b832006-07-01 11:36:54 -040098 lock_battery_dir_cnt--;
Rich Townsend3f86b832006-07-01 11:36:54 -040099 if (lock_battery_dir_cnt == 0 && acpi_battery_dir_param
100 && acpi_battery_dir) {
101 remove_proc_entry(ACPI_BATTERY_CLASS, acpi_root_dir);
Al Viro4370df92006-10-10 22:47:17 +0100102 acpi_battery_dir = NULL;
Rich Townsend3f86b832006-07-01 11:36:54 -0400103 }
Andrew Morton8970bfe2006-07-10 02:34:45 -0400104 mutex_unlock(&cm_sbs_mutex);
Len Brown635227e2006-07-01 16:48:23 -0400105 return;
Rich Townsend3f86b832006-07-01 11:36:54 -0400106}
Rich Townsend3f86b832006-07-01 11:36:54 -0400107EXPORT_SYMBOL(acpi_unlock_battery_dir);
108
109static int __init acpi_cm_sbs_init(void)
110{
Len Brown635227e2006-07-01 16:48:23 -0400111 return 0;
Rich Townsend3f86b832006-07-01 11:36:54 -0400112}
Rich Townsend3f86b832006-07-01 11:36:54 -0400113subsys_initcall(acpi_cm_sbs_init);