Rich Townsend | 3f86b83 | 2006-07-01 11:36:54 -0400 | [diff] [blame] | 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 | |
Len Brown | f52fd66 | 2007-02-12 22:42:12 -0500 | [diff] [blame] | 34 | ACPI_MODULE_NAME("cm_sbs"); |
Rich Townsend | 3f86b83 | 2006-07-01 11:36:54 -0400 | [diff] [blame] | 35 | #define ACPI_AC_CLASS "ac_adapter" |
| 36 | #define ACPI_BATTERY_CLASS "battery" |
Rich Townsend | 3f86b83 | 2006-07-01 11:36:54 -0400 | [diff] [blame] | 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 | |
Andrew Morton | 8970bfe | 2006-07-10 02:34:45 -0400 | [diff] [blame] | 41 | static DEFINE_MUTEX(cm_sbs_mutex); |
Rich Townsend | 3f86b83 | 2006-07-01 11:36:54 -0400 | [diff] [blame] | 42 | |
Andrew Morton | 8970bfe | 2006-07-10 02:34:45 -0400 | [diff] [blame] | 43 | static int lock_ac_dir_cnt; |
| 44 | static int lock_battery_dir_cnt; |
Rich Townsend | 3f86b83 | 2006-07-01 11:36:54 -0400 | [diff] [blame] | 45 | |
| 46 | struct proc_dir_entry *acpi_lock_ac_dir(void) |
| 47 | { |
Andrew Morton | 8970bfe | 2006-07-10 02:34:45 -0400 | [diff] [blame] | 48 | mutex_lock(&cm_sbs_mutex); |
| 49 | if (!acpi_ac_dir) |
Rich Townsend | 3f86b83 | 2006-07-01 11:36:54 -0400 | [diff] [blame] | 50 | acpi_ac_dir = proc_mkdir(ACPI_AC_CLASS, acpi_root_dir); |
Rich Townsend | 3f86b83 | 2006-07-01 11:36:54 -0400 | [diff] [blame] | 51 | if (acpi_ac_dir) { |
| 52 | lock_ac_dir_cnt++; |
| 53 | } else { |
Lin Ming | 55ac9a0 | 2008-09-28 14:51:56 +0800 | [diff] [blame] | 54 | printk(KERN_ERR PREFIX |
| 55 | "Cannot create %s\n", ACPI_AC_CLASS); |
Rich Townsend | 3f86b83 | 2006-07-01 11:36:54 -0400 | [diff] [blame] | 56 | } |
Andrew Morton | 8970bfe | 2006-07-10 02:34:45 -0400 | [diff] [blame] | 57 | mutex_unlock(&cm_sbs_mutex); |
Len Brown | 635227e | 2006-07-01 16:48:23 -0400 | [diff] [blame] | 58 | return acpi_ac_dir; |
Rich Townsend | 3f86b83 | 2006-07-01 11:36:54 -0400 | [diff] [blame] | 59 | } |
Rich Townsend | 3f86b83 | 2006-07-01 11:36:54 -0400 | [diff] [blame] | 60 | EXPORT_SYMBOL(acpi_lock_ac_dir); |
| 61 | |
| 62 | void acpi_unlock_ac_dir(struct proc_dir_entry *acpi_ac_dir_param) |
| 63 | { |
Andrew Morton | 8970bfe | 2006-07-10 02:34:45 -0400 | [diff] [blame] | 64 | mutex_lock(&cm_sbs_mutex); |
| 65 | if (acpi_ac_dir_param) |
Rich Townsend | 3f86b83 | 2006-07-01 11:36:54 -0400 | [diff] [blame] | 66 | lock_ac_dir_cnt--; |
Rich Townsend | 3f86b83 | 2006-07-01 11:36:54 -0400 | [diff] [blame] | 67 | if (lock_ac_dir_cnt == 0 && acpi_ac_dir_param && acpi_ac_dir) { |
| 68 | remove_proc_entry(ACPI_AC_CLASS, acpi_root_dir); |
Al Viro | 4370df9 | 2006-10-10 22:47:17 +0100 | [diff] [blame] | 69 | acpi_ac_dir = NULL; |
Rich Townsend | 3f86b83 | 2006-07-01 11:36:54 -0400 | [diff] [blame] | 70 | } |
Andrew Morton | 8970bfe | 2006-07-10 02:34:45 -0400 | [diff] [blame] | 71 | mutex_unlock(&cm_sbs_mutex); |
Rich Townsend | 3f86b83 | 2006-07-01 11:36:54 -0400 | [diff] [blame] | 72 | } |
Rich Townsend | 3f86b83 | 2006-07-01 11:36:54 -0400 | [diff] [blame] | 73 | EXPORT_SYMBOL(acpi_unlock_ac_dir); |
| 74 | |
| 75 | struct proc_dir_entry *acpi_lock_battery_dir(void) |
| 76 | { |
Andrew Morton | 8970bfe | 2006-07-10 02:34:45 -0400 | [diff] [blame] | 77 | mutex_lock(&cm_sbs_mutex); |
Rich Townsend | 3f86b83 | 2006-07-01 11:36:54 -0400 | [diff] [blame] | 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 { |
Lin Ming | 55ac9a0 | 2008-09-28 14:51:56 +0800 | [diff] [blame] | 85 | printk(KERN_ERR PREFIX |
| 86 | "Cannot create %s\n", ACPI_BATTERY_CLASS); |
Rich Townsend | 3f86b83 | 2006-07-01 11:36:54 -0400 | [diff] [blame] | 87 | } |
Andrew Morton | 8970bfe | 2006-07-10 02:34:45 -0400 | [diff] [blame] | 88 | mutex_unlock(&cm_sbs_mutex); |
Len Brown | 635227e | 2006-07-01 16:48:23 -0400 | [diff] [blame] | 89 | return acpi_battery_dir; |
Rich Townsend | 3f86b83 | 2006-07-01 11:36:54 -0400 | [diff] [blame] | 90 | } |
Rich Townsend | 3f86b83 | 2006-07-01 11:36:54 -0400 | [diff] [blame] | 91 | EXPORT_SYMBOL(acpi_lock_battery_dir); |
| 92 | |
| 93 | void acpi_unlock_battery_dir(struct proc_dir_entry *acpi_battery_dir_param) |
| 94 | { |
Andrew Morton | 8970bfe | 2006-07-10 02:34:45 -0400 | [diff] [blame] | 95 | mutex_lock(&cm_sbs_mutex); |
| 96 | if (acpi_battery_dir_param) |
Rich Townsend | 3f86b83 | 2006-07-01 11:36:54 -0400 | [diff] [blame] | 97 | lock_battery_dir_cnt--; |
Rich Townsend | 3f86b83 | 2006-07-01 11:36:54 -0400 | [diff] [blame] | 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); |
Al Viro | 4370df9 | 2006-10-10 22:47:17 +0100 | [diff] [blame] | 101 | acpi_battery_dir = NULL; |
Rich Townsend | 3f86b83 | 2006-07-01 11:36:54 -0400 | [diff] [blame] | 102 | } |
Andrew Morton | 8970bfe | 2006-07-10 02:34:45 -0400 | [diff] [blame] | 103 | mutex_unlock(&cm_sbs_mutex); |
Len Brown | 635227e | 2006-07-01 16:48:23 -0400 | [diff] [blame] | 104 | return; |
Rich Townsend | 3f86b83 | 2006-07-01 11:36:54 -0400 | [diff] [blame] | 105 | } |
Rich Townsend | 3f86b83 | 2006-07-01 11:36:54 -0400 | [diff] [blame] | 106 | EXPORT_SYMBOL(acpi_unlock_battery_dir); |