1 files changed, 106 insertions, 0 deletions

diff --git a/include/linux/android_alarm.h b/include/linux/android_alarm.h
new file mode 100644
index 00000000000..f8f14e793db
--- /dev/null
+++ b/include/linux/android_alarm.h
@@ -0,0 +1,106 @@
+/* include/linux/android_alarm.h
+ *
+ * Copyright (C) 2006-2007 Google, Inc.
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * 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.
+ *
+ */
+
+#ifndef _LINUX_ANDROID_ALARM_H
+#define _LINUX_ANDROID_ALARM_H
+
+#include <linux/ioctl.h>
+#include <linux/time.h>
+
+enum android_alarm_type {
+        /* return code bit numbers or set alarm arg */
+        ANDROID_ALARM_RTC_WAKEUP,
+        ANDROID_ALARM_RTC,
+        ANDROID_ALARM_ELAPSED_REALTIME_WAKEUP,
+        ANDROID_ALARM_ELAPSED_REALTIME,
+        ANDROID_ALARM_SYSTEMTIME,
+
+        ANDROID_ALARM_TYPE_COUNT,
+
+        /* return code bit numbers */
+        /* ANDROID_ALARM_TIME_CHANGE = 16 */
+};
+
+#ifdef __KERNEL__
+
+#include <linux/ktime.h>
+#include <linux/rbtree.h>
+
+/*
+ * The alarm interface is similar to the hrtimer interface but adds support
+ * for wakeup from suspend. It also adds an elapsed realtime clock that can
+ * be used for periodic timers that need to keep runing while the system is
+ * suspended and not be disrupted when the wall time is set.
+ */
+
+/**
+ * struct alarm - the basic alarm structure
+ * @node:       red black tree node for time ordered insertion
+ * @type:       alarm type. rtc/elapsed-realtime/systemtime, wakeup/non-wakeup.
+ * @softexpires: the absolute earliest expiry time of the alarm.
+ * @expires:    the absolute expiry time.
+ * @function:   alarm expiry callback function
+ *
+ * The alarm structure must be initialized by alarm_init()
+ *
+ */
+
+struct alarm {
+        struct rb_node          node;
+        enum android_alarm_type type;
+        ktime_t                 softexpires;
+        ktime_t                 expires;
+        void                    (*function)(struct alarm *);
+};
+
+void alarm_init(struct alarm *alarm,
+        enum android_alarm_type type, void (*function)(struct alarm *));
+void alarm_start_range(struct alarm *alarm, ktime_t start, ktime_t end);
+int alarm_try_to_cancel(struct alarm *alarm);
+int alarm_cancel(struct alarm *alarm);
+ktime_t alarm_get_elapsed_realtime(void);
+
+/* set rtc while preserving elapsed realtime */
+int alarm_set_rtc(const struct timespec ts);
+
+#endif
+
+enum android_alarm_return_flags {
+        ANDROID_ALARM_RTC_WAKEUP_MASK = 1U << ANDROID_ALARM_RTC_WAKEUP,
+        ANDROID_ALARM_RTC_MASK = 1U << ANDROID_ALARM_RTC,
+        ANDROID_ALARM_ELAPSED_REALTIME_WAKEUP_MASK =
+                                1U << ANDROID_ALARM_ELAPSED_REALTIME_WAKEUP,
+        ANDROID_ALARM_ELAPSED_REALTIME_MASK =
+                                1U << ANDROID_ALARM_ELAPSED_REALTIME,
+        ANDROID_ALARM_SYSTEMTIME_MASK = 1U << ANDROID_ALARM_SYSTEMTIME,
+        ANDROID_ALARM_TIME_CHANGE_MASK = 1U << 16
+};
+
+/* Disable alarm */
+#define ANDROID_ALARM_CLEAR(type)           _IO('a', 0 | ((type) << 4))
+
+/* Ack last alarm and wait for next */
+#define ANDROID_ALARM_WAIT                  _IO('a', 1)
+
+#define ALARM_IOW(c, type, size)            _IOW('a', (c) | ((type) << 4), size)
+/* Set alarm */
+#define ANDROID_ALARM_SET(type)             ALARM_IOW(2, type, struct timespec)
+#define ANDROID_ALARM_SET_AND_WAIT(type)    ALARM_IOW(3, type, struct timespec)
+#define ANDROID_ALARM_GET_TIME(type)        ALARM_IOW(4, type, struct timespec)
+#define ANDROID_ALARM_SET_RTC               _IOW('a', 5, struct timespec)
+#define ANDROID_ALARM_BASE_CMD(cmd)         (cmd & ~(_IOC(0, 0, 0xf0, 0)))
+#define ANDROID_ALARM_IOCTL_TO_TYPE(cmd)    (_IOC_NR(cmd) >> 4)
+
+#endif