This commit was manufactured by cvs2svn to create branch 'vserver'.

[linux-2.6.git] / drivers / acpi / cm_sbs.c

diff --git a/drivers/acpi/cm_sbs.c b/drivers/acpi/cm_sbs.c
new file mode 100644 (file)
index 0000000..a01ce67
--- /dev/null
+++ b/drivers/acpi/cm_sbs.c
@@ -0,0 +1,113 @@
+/*
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or (at
+ *  your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful, but
+ *  WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *  General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License along
+ *  with this program; if not, write to the Free Software Foundation, Inc.,
+ *  59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+ *
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/acpi.h>
+#include <linux/types.h>
+#include <linux/proc_fs.h>
+#include <linux/seq_file.h>
+#include <acpi/acpi_bus.h>
+#include <acpi/acpi_drivers.h>
+#include <acpi/acmacros.h>
+#include <acpi/actypes.h>
+#include <acpi/acutils.h>
+
+ACPI_MODULE_NAME("cm_sbs")
+#define ACPI_AC_CLASS          "ac_adapter"
+#define ACPI_BATTERY_CLASS     "battery"
+#define ACPI_SBS_COMPONENT     0x00080000
+#define _COMPONENT             ACPI_SBS_COMPONENT
+static struct proc_dir_entry *acpi_ac_dir;
+static struct proc_dir_entry *acpi_battery_dir;
+
+static DEFINE_MUTEX(cm_sbs_mutex);
+
+static int lock_ac_dir_cnt;
+static int lock_battery_dir_cnt;
+
+struct proc_dir_entry *acpi_lock_ac_dir(void)
+{
+       mutex_lock(&cm_sbs_mutex);
+       if (!acpi_ac_dir)
+               acpi_ac_dir = proc_mkdir(ACPI_AC_CLASS, acpi_root_dir);
+       if (acpi_ac_dir) {
+               lock_ac_dir_cnt++;
+       } else {
+               ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
+                                 "Cannot create %s\n", ACPI_AC_CLASS));
+       }
+       mutex_unlock(&cm_sbs_mutex);
+       return acpi_ac_dir;
+}
+EXPORT_SYMBOL(acpi_lock_ac_dir);
+
+void acpi_unlock_ac_dir(struct proc_dir_entry *acpi_ac_dir_param)
+{
+       mutex_lock(&cm_sbs_mutex);
+       if (acpi_ac_dir_param)
+               lock_ac_dir_cnt--;
+       if (lock_ac_dir_cnt == 0 && acpi_ac_dir_param && acpi_ac_dir) {
+               remove_proc_entry(ACPI_AC_CLASS, acpi_root_dir);
+               acpi_ac_dir = 0;
+       }
+       mutex_unlock(&cm_sbs_mutex);
+}
+EXPORT_SYMBOL(acpi_unlock_ac_dir);
+
+struct proc_dir_entry *acpi_lock_battery_dir(void)
+{
+       mutex_lock(&cm_sbs_mutex);
+       if (!acpi_battery_dir) {
+               acpi_battery_dir =
+                   proc_mkdir(ACPI_BATTERY_CLASS, acpi_root_dir);
+       }
+       if (acpi_battery_dir) {
+               lock_battery_dir_cnt++;
+       } else {
+               ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
+                                 "Cannot create %s\n", ACPI_BATTERY_CLASS));
+       }
+       mutex_unlock(&cm_sbs_mutex);
+       return acpi_battery_dir;
+}
+EXPORT_SYMBOL(acpi_lock_battery_dir);
+
+void acpi_unlock_battery_dir(struct proc_dir_entry *acpi_battery_dir_param)
+{
+       mutex_lock(&cm_sbs_mutex);
+       if (acpi_battery_dir_param)
+               lock_battery_dir_cnt--;
+       if (lock_battery_dir_cnt == 0 && acpi_battery_dir_param
+           && acpi_battery_dir) {
+               remove_proc_entry(ACPI_BATTERY_CLASS, acpi_root_dir);
+               acpi_battery_dir = 0;
+       }
+       mutex_unlock(&cm_sbs_mutex);
+       return;
+}
+EXPORT_SYMBOL(acpi_unlock_battery_dir);
+
+static int __init acpi_cm_sbs_init(void)
+{
+       return 0;
+}
+subsys_initcall(acpi_cm_sbs_init);