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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 | |
31 | #define PREFIX "ACPI: " |
32 | |
33 | ACPI_MODULE_NAME("cm_sbs"); |
34 | #define ACPI_AC_CLASS "ac_adapter" |
35 | #define ACPI_BATTERY_CLASS "battery" |
36 | #define _COMPONENT ACPI_SBS_COMPONENT |
37 | static struct proc_dir_entry *acpi_ac_dir; |
38 | static struct proc_dir_entry *acpi_battery_dir; |
39 | |
40 | static DEFINE_MUTEX(cm_sbs_mutex); |
41 | |
42 | static int lock_ac_dir_cnt; |
43 | static int lock_battery_dir_cnt; |
44 | |
45 | struct proc_dir_entry *acpi_lock_ac_dir(void) |
46 | { |
47 | mutex_lock(&cm_sbs_mutex); |
48 | if (!acpi_ac_dir) |
49 | acpi_ac_dir = proc_mkdir(ACPI_AC_CLASS, acpi_root_dir); |
50 | if (acpi_ac_dir) { |
51 | lock_ac_dir_cnt++; |
52 | } else { |
53 | printk(KERN_ERR PREFIX |
54 | "Cannot create %s\n", ACPI_AC_CLASS); |
55 | } |
56 | mutex_unlock(&cm_sbs_mutex); |
57 | return acpi_ac_dir; |
58 | } |
59 | EXPORT_SYMBOL(acpi_lock_ac_dir); |
60 | |
61 | void acpi_unlock_ac_dir(struct proc_dir_entry *acpi_ac_dir_param) |
62 | { |
63 | mutex_lock(&cm_sbs_mutex); |
64 | if (acpi_ac_dir_param) |
65 | lock_ac_dir_cnt--; |
66 | if (lock_ac_dir_cnt == 0 && acpi_ac_dir_param && acpi_ac_dir) { |
67 | remove_proc_entry(ACPI_AC_CLASS, acpi_root_dir); |
68 | acpi_ac_dir = NULL; |
69 | } |
70 | mutex_unlock(&cm_sbs_mutex); |
71 | } |
72 | EXPORT_SYMBOL(acpi_unlock_ac_dir); |
73 | |
74 | struct proc_dir_entry *acpi_lock_battery_dir(void) |
75 | { |
76 | mutex_lock(&cm_sbs_mutex); |
77 | if (!acpi_battery_dir) { |
78 | acpi_battery_dir = |
79 | proc_mkdir(ACPI_BATTERY_CLASS, acpi_root_dir); |
80 | } |
81 | if (acpi_battery_dir) { |
82 | lock_battery_dir_cnt++; |
83 | } else { |
84 | printk(KERN_ERR PREFIX |
85 | "Cannot create %s\n", ACPI_BATTERY_CLASS); |
86 | } |
87 | mutex_unlock(&cm_sbs_mutex); |
88 | return acpi_battery_dir; |
89 | } |
90 | EXPORT_SYMBOL(acpi_lock_battery_dir); |
91 | |
92 | void acpi_unlock_battery_dir(struct proc_dir_entry *acpi_battery_dir_param) |
93 | { |
94 | mutex_lock(&cm_sbs_mutex); |
95 | if (acpi_battery_dir_param) |
96 | lock_battery_dir_cnt--; |
97 | if (lock_battery_dir_cnt == 0 && acpi_battery_dir_param |
98 | && acpi_battery_dir) { |
99 | remove_proc_entry(ACPI_BATTERY_CLASS, acpi_root_dir); |
100 | acpi_battery_dir = NULL; |
101 | } |
102 | mutex_unlock(&cm_sbs_mutex); |
103 | return; |
104 | } |
105 | EXPORT_SYMBOL(acpi_unlock_battery_dir); |
106 |
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Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
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v3.9