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path: root/drivers/acpi/cm_sbs.c
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Diffstat (limited to 'drivers/acpi/cm_sbs.c')
-rw-r--r--drivers/acpi/cm_sbs.c131
1 files changed, 131 insertions, 0 deletions
diff --git a/drivers/acpi/cm_sbs.c b/drivers/acpi/cm_sbs.c
new file mode 100644
index 000000000000..574a75a166c5
--- /dev/null
+++ b/drivers/acpi/cm_sbs.c
@@ -0,0 +1,131 @@
+/*
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ *
+ * 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 struct semaphore cm_sbs_sem;
+
+static int lock_ac_dir_cnt = 0;
+static int lock_battery_dir_cnt = 0;
+
+struct proc_dir_entry *acpi_lock_ac_dir(void)
+{
+
+ down(&cm_sbs_sem);
+ 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));
+ }
+ up(&cm_sbs_sem);
+ return acpi_ac_dir;
+}
+
+EXPORT_SYMBOL(acpi_lock_ac_dir);
+
+void acpi_unlock_ac_dir(struct proc_dir_entry *acpi_ac_dir_param)
+{
+
+ down(&cm_sbs_sem);
+ 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;
+ }
+ up(&cm_sbs_sem);
+}
+
+EXPORT_SYMBOL(acpi_unlock_ac_dir);
+
+struct proc_dir_entry *acpi_lock_battery_dir(void)
+{
+
+ down(&cm_sbs_sem);
+ 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));
+ }
+ up(&cm_sbs_sem);
+ return acpi_battery_dir;
+}
+
+EXPORT_SYMBOL(acpi_lock_battery_dir);
+
+void acpi_unlock_battery_dir(struct proc_dir_entry *acpi_battery_dir_param)
+{
+
+ down(&cm_sbs_sem);
+ 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;
+ }
+ up(&cm_sbs_sem);
+ return;
+}
+
+EXPORT_SYMBOL(acpi_unlock_battery_dir);
+
+static int __init acpi_cm_sbs_init(void)
+{
+
+ if (acpi_disabled)
+ return 0;
+
+ init_MUTEX(&cm_sbs_sem);
+
+ return 0;
+}
+
+subsys_initcall(acpi_cm_sbs_init);