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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 | |
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); |