projects / deliverable / linux.git / blame
| 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 | ||
| f52fd66d | 34 | ACPI_MODULE_NAME("cm_sbs"); |
| 3f86b832 RT |
35 | #define ACPI_AC_CLASS "ac_adapter" |
| 36 | #define ACPI_BATTERY_CLASS "battery" | |
| 3f86b832 RT |
37 | #define _COMPONENT ACPI_SBS_COMPONENT |
| 38 | static struct proc_dir_entry *acpi_ac_dir; | |
| 39 | static struct proc_dir_entry *acpi_battery_dir; | |
| 40 | ||
| 8970bfe7 | 41 | static DEFINE_MUTEX(cm_sbs_mutex); |
| 3f86b832 | 42 | |
| 8970bfe7 AM |
43 | static int lock_ac_dir_cnt; |
| 44 | static int lock_battery_dir_cnt; | |
| 3f86b832 RT |
45 | |
| 46 | struct proc_dir_entry *acpi_lock_ac_dir(void) | |
| 47 | { | |
| 8970bfe7 AM |
48 | mutex_lock(&cm_sbs_mutex); |
| 49 | if (!acpi_ac_dir) | |
| 3f86b832 | 50 | acpi_ac_dir = proc_mkdir(ACPI_AC_CLASS, acpi_root_dir); |
| 3f86b832 RT |
51 | if (acpi_ac_dir) { |
| 52 | lock_ac_dir_cnt++; | |
| 53 | } else { | |
| 55ac9a01 LM |
54 | printk(KERN_ERR PREFIX |
| 55 | "Cannot create %s\n", ACPI_AC_CLASS); | |
| 3f86b832 | 56 | } |
| 8970bfe7 | 57 | mutex_unlock(&cm_sbs_mutex); |
| 635227ee | 58 | return acpi_ac_dir; |
| 3f86b832 | 59 | } |
| 3f86b832 RT |
60 | EXPORT_SYMBOL(acpi_lock_ac_dir); |
| 61 | ||
| 62 | void acpi_unlock_ac_dir(struct proc_dir_entry *acpi_ac_dir_param) | |
| 63 | { | |
| 8970bfe7 AM |
64 | mutex_lock(&cm_sbs_mutex); |
| 65 | if (acpi_ac_dir_param) | |
| 3f86b832 | 66 | lock_ac_dir_cnt--; |
| 3f86b832 RT |
67 | if (lock_ac_dir_cnt == 0 && acpi_ac_dir_param && acpi_ac_dir) { |
| 68 | remove_proc_entry(ACPI_AC_CLASS, acpi_root_dir); | |
| 4370df97 | 69 | acpi_ac_dir = NULL; |
| 3f86b832 | 70 | } |
| 8970bfe7 | 71 | mutex_unlock(&cm_sbs_mutex); |
| 3f86b832 | 72 | } |
| 3f86b832 RT |
73 | EXPORT_SYMBOL(acpi_unlock_ac_dir); |
| 74 | ||
| 75 | struct proc_dir_entry *acpi_lock_battery_dir(void) | |
| 76 | { | |
| 8970bfe7 | 77 | mutex_lock(&cm_sbs_mutex); |
| 3f86b832 RT |
78 | if (!acpi_battery_dir) { |
| 79 | acpi_battery_dir = | |
| 80 | proc_mkdir(ACPI_BATTERY_CLASS, acpi_root_dir); | |
| 81 | } | |
| 82 | if (acpi_battery_dir) { | |
| 83 | lock_battery_dir_cnt++; | |
| 84 | } else { | |
| 55ac9a01 LM |
85 | printk(KERN_ERR PREFIX |
| 86 | "Cannot create %s\n", ACPI_BATTERY_CLASS); | |
| 3f86b832 | 87 | } |
| 8970bfe7 | 88 | mutex_unlock(&cm_sbs_mutex); |
| 635227ee | 89 | return acpi_battery_dir; |
| 3f86b832 | 90 | } |
| 3f86b832 RT |
91 | EXPORT_SYMBOL(acpi_lock_battery_dir); |
| 92 | ||
| 93 | void acpi_unlock_battery_dir(struct proc_dir_entry *acpi_battery_dir_param) | |
| 94 | { | |
| 8970bfe7 AM |
95 | mutex_lock(&cm_sbs_mutex); |
| 96 | if (acpi_battery_dir_param) | |
| 3f86b832 | 97 | lock_battery_dir_cnt--; |
| 3f86b832 RT |
98 | if (lock_battery_dir_cnt == 0 && acpi_battery_dir_param |
| 99 | && acpi_battery_dir) { | |
| 100 | remove_proc_entry(ACPI_BATTERY_CLASS, acpi_root_dir); | |
| 4370df97 | 101 | acpi_battery_dir = NULL; |
| 3f86b832 | 102 | } |
| 8970bfe7 | 103 | mutex_unlock(&cm_sbs_mutex); |
| 635227ee | 104 | return; |
| 3f86b832 | 105 | } |
| 3f86b832 | 106 | EXPORT_SYMBOL(acpi_unlock_battery_dir); |