PowerOffAlarms: add ANDROID_INTF_ALARM_DEV and activate it

  Provides non-wakeup and rtc backed wakeup alarms based on rtc or
  elapsed realtime, and a non-wakeup alarm on the monotonic clock.
  Espically for wake up alarm ioctl.
  Also exports the alarm interface to user-space.

4 files changed, 678 insertions, 0 deletions

diff --git a/drivers/staging/android/Kconfig b/drivers/staging/android/Kconfig
index c6ebf2186..d5fdc3eb2 100644
--- a/drivers/staging/android/Kconfig
+++ b/drivers/staging/android/Kconfig
@@ -52,6 +52,16 @@ config ANDROID_LMK_ADJ_RBTREE
 	    Use oom_score_adj rbtree to select the best proecss to kill
 	    when system in low memory status.
 
+config ANDROID_INTF_ALARM_DEV
+	bool "Android alarm driver"
+	depends on RTC_CLASS
+	default y
+	---help---
+	  Provides non-wakeup and rtc backed wakeup alarms based on rtc or
+	  elapsed realtime, and a non-wakeup alarm on the monotonic clock.
+	  Espically for wake up alarm ioctl.
+	  Also exports the alarm interface to user-space.
+
 config SYNC
 	bool "Synchronization framework"
 	default n
diff --git a/drivers/staging/android/Makefile b/drivers/staging/android/Makefile
index 14fc28457..8fc7be468 100644
--- a/drivers/staging/android/Makefile
+++ b/drivers/staging/android/Makefile
@@ -13,4 +13,5 @@ obj-$(CONFIG_ANDROID_TIMED_OUTPUT)	+= timed_output.o
 obj-$(CONFIG_ANDROID_TIMED_GPIO)	+= timed_gpio.o
 obj-$(CONFIG_ANDROID_LOW_MEMORY_KILLER)	+= lowmemorykiller.o
 obj-$(CONFIG_SYNC)			+= sync.o
+obj-$(CONFIG_ANDROID_INTF_ALARM_DEV)	+= alarm-dev.o
 obj-$(CONFIG_SW_SYNC)			+= sw_sync.o
diff --git a/drivers/staging/android/alarm-dev.c b/drivers/staging/android/alarm-dev.c
new file mode 100644
index 000000000..254d5fe89
--- /dev/null
+++ b/drivers/staging/android/alarm-dev.c
@@ -0,0 +1,568 @@
+/* drivers/rtc/alarm-dev.c
+ *
+ * Copyright (C) 2007-2009 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.
+ *
+ */
+
+#ifdef pr_fmt
+#undef pr_fmt
+#endif
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+#include <linux/time.h>
+#include <linux/module.h>
+#include <linux/device.h>
+#include <linux/miscdevice.h>
+#include <linux/fs.h>
+#include <linux/platform_device.h>
+#include <linux/sched.h>
+#include <linux/spinlock.h>
+#include <linux/uaccess.h>
+#include <linux/rtc.h>
+#include <linux/alarmtimer.h>
+#include "android_alarm.h"
+#include <linux/ioctl.h>
+#define LOG_MYTAG	"Power/Alarm"
+
+#define ANDROID_ALARM_PRINT_INFO (1U << 0)
+#define ANDROID_ALARM_PRINT_IO (1U << 1)
+#define ANDROID_ALARM_PRINT_INT (1U << 2)
+
+static int debug_mask = ANDROID_ALARM_PRINT_INFO;
+module_param_named(debug_mask, debug_mask, int, S_IRUGO | S_IWUSR | S_IWGRP);
+
+#define alarm_dbg(debug_level_mask, fmt, args...)				\
+do {									\
+	if (debug_mask & ANDROID_ALARM_PRINT_##debug_level_mask)	\
+			pr_debug(LOG_MYTAG fmt, ##args); \
+} while (0)
+
+#define ANDROID_ALARM_WAKEUP_MASK ( \
+	ANDROID_ALARM_RTC_WAKEUP_MASK | \
+	ANDROID_ALARM_ELAPSED_REALTIME_WAKEUP_MASK)
+
+static int alarm_opened;
+static DEFINE_SPINLOCK(alarm_slock);
+static struct wakeup_source alarm_wake_lock;
+static DECLARE_WAIT_QUEUE_HEAD(alarm_wait_queue);
+static uint32_t alarm_pending;
+static uint32_t alarm_enabled;
+static uint32_t wait_pending;
+
+struct devalarm {
+	union {
+		struct hrtimer hrt;
+		struct alarm alrm;
+	} u;
+	enum android_alarm_type type;
+};
+
+static struct devalarm alarms[ANDROID_ALARM_TYPE_COUNT];
+
+
+static int is_wakeup(enum android_alarm_type type)
+{
+	return (type == ANDROID_ALARM_RTC_WAKEUP ||
+		type == ANDROID_ALARM_ELAPSED_REALTIME_WAKEUP);
+}
+
+
+static void devalarm_start(struct devalarm *alrm, ktime_t exp)
+{
+	if (is_wakeup(alrm->type))
+		alarm_start(&alrm->u.alrm, exp);
+	else
+		hrtimer_start(&alrm->u.hrt, exp, HRTIMER_MODE_ABS);
+}
+
+
+static int devalarm_try_to_cancel(struct devalarm *alrm)
+{
+	if (is_wakeup(alrm->type))
+		return alarm_try_to_cancel(&alrm->u.alrm);
+	return hrtimer_try_to_cancel(&alrm->u.hrt);
+}
+
+static void devalarm_cancel(struct devalarm *alrm)
+{
+	if (is_wakeup(alrm->type))
+		alarm_cancel(&alrm->u.alrm);
+	else
+		hrtimer_cancel(&alrm->u.hrt);
+}
+
+void alarm_set_power_on(struct timespec new_pwron_time, bool logo)
+{
+	unsigned long pwron_time;
+	struct rtc_wkalrm alm;
+	struct rtc_device *alarm_rtc_dev;
+
+	alarm_dbg(INFO, "alarm set power on\n");
+
+#ifdef RTC_PWRON_SEC
+	/* round down the second */
+	new_pwron_time.tv_sec = (new_pwron_time.tv_sec / 60) * 60;
+#endif
+	if (new_pwron_time.tv_sec > 0) {
+		pwron_time = new_pwron_time.tv_sec;
+#ifdef RTC_PWRON_SEC
+		pwron_time += RTC_PWRON_SEC;
+#endif
+		alm.enabled = (logo ? 3 : 2);
+	} else {
+		pwron_time = 0;
+		alm.enabled = 4;
+	}
+	alarm_rtc_dev = alarmtimer_get_rtcdev();
+	rtc_time_to_tm(pwron_time, &alm.time);
+	rtc_set_alarm(alarm_rtc_dev, &alm);
+	rtc_set_alarm_poweron(alarm_rtc_dev, &alm);
+}
+
+void alarm_get_power_on(struct rtc_wkalrm *alm)
+{
+	if (!alm)
+		return;
+
+	memset(alm, 0, sizeof(struct rtc_wkalrm));
+#ifndef CONFIG_MTK_FPGA
+	rtc_read_pwron_alarm(alm);
+#endif
+}
+
+static void alarm_clear(enum android_alarm_type alarm_type,
+							struct timespec *ts)
+{
+	uint32_t alarm_type_mask = 1U << alarm_type;
+	unsigned long flags;
+
+	alarm_dbg(IO, "alarm %d clear\n", alarm_type);
+	if (alarm_type == ANDROID_ALARM_POWER_ON ||
+		alarm_type == ANDROID_ALARM_POWER_ON_LOGO) {
+		ts->tv_sec = 0;
+		alarm_set_power_on(*ts, false);
+		return;
+	}
+	spin_lock_irqsave(&alarm_slock, flags);
+	devalarm_try_to_cancel(&alarms[alarm_type]);
+	if (alarm_pending) {
+		alarm_pending &= ~alarm_type_mask;
+		if (!alarm_pending && !wait_pending)
+			__pm_relax(&alarm_wake_lock);
+	}
+	alarm_enabled &= ~alarm_type_mask;
+	spin_unlock_irqrestore(&alarm_slock, flags);
+
+}
+
+static void alarm_set(enum android_alarm_type alarm_type,
+							struct timespec *ts)
+{
+	uint32_t alarm_type_mask = 1U << alarm_type;
+	unsigned long flags;
+
+	if (alarm_type == ANDROID_ALARM_POWER_ON) {
+		alarm_set_power_on(*ts, false);
+		return;
+	}
+	if (alarm_type == ANDROID_ALARM_POWER_ON_LOGO) {
+		alarm_set_power_on(*ts, true);
+		return;
+	}
+
+	spin_lock_irqsave(&alarm_slock, flags);
+	alarm_enabled |= alarm_type_mask;
+	devalarm_start(&alarms[alarm_type], timespec_to_ktime(*ts));
+	spin_unlock_irqrestore(&alarm_slock, flags);
+}
+
+static int alarm_wait(void)
+{
+	unsigned long flags;
+	int rv = 0;
+
+	spin_lock_irqsave(&alarm_slock, flags);
+	alarm_dbg(IO, "alarm wait\n");
+	if (!alarm_pending && wait_pending) {
+		__pm_relax(&alarm_wake_lock);
+		wait_pending = 0;
+	}
+	spin_unlock_irqrestore(&alarm_slock, flags);
+
+	rv = wait_event_interruptible(alarm_wait_queue, alarm_pending);
+	if (rv)
+		return rv;
+
+	spin_lock_irqsave(&alarm_slock, flags);
+	rv = alarm_pending;
+	wait_pending = 1;
+	alarm_pending = 0;
+	spin_unlock_irqrestore(&alarm_slock, flags);
+
+	return rv;
+}
+
+static int alarm_set_rtc(struct timespec *ts)
+{
+	struct rtc_time new_rtc_tm;
+	struct rtc_device *rtc_dev;
+	unsigned long flags;
+	int rv = 0;
+
+	rtc_time_to_tm(ts->tv_sec, &new_rtc_tm);
+	alarm_dbg(INFO, "set rtc %ld %ld - rtc %02d:%02d:%02d %02d/%02d/%04d\n",
+	ts->tv_sec, ts->tv_nsec,
+	new_rtc_tm.tm_hour, new_rtc_tm.tm_min,
+	new_rtc_tm.tm_sec, new_rtc_tm.tm_mon + 1,
+	new_rtc_tm.tm_mday,
+	new_rtc_tm.tm_year + 1900);
+	rtc_dev = alarmtimer_get_rtcdev();
+	rv = do_settimeofday(ts);
+	if (rv < 0)
+		return rv;
+	if (rtc_dev)
+		rv = rtc_set_time(rtc_dev, &new_rtc_tm);
+
+	spin_lock_irqsave(&alarm_slock, flags);
+	alarm_pending |= ANDROID_ALARM_TIME_CHANGE_MASK;
+	wake_up(&alarm_wait_queue);
+	spin_unlock_irqrestore(&alarm_slock, flags);
+
+	return rv;
+}
+
+static int alarm_get_time(enum android_alarm_type alarm_type,
+							struct timespec *ts)
+{
+	int rv = 0;
+
+	switch (alarm_type) {
+	case ANDROID_ALARM_RTC_WAKEUP:
+	case ANDROID_ALARM_RTC:
+		getnstimeofday(ts);
+		break;
+	case ANDROID_ALARM_ELAPSED_REALTIME_WAKEUP:
+	case ANDROID_ALARM_ELAPSED_REALTIME:
+		get_monotonic_boottime(ts);
+		break;
+	case ANDROID_ALARM_SYSTEMTIME:
+		ktime_get_ts(ts);
+		break;
+	case ANDROID_ALARM_POWER_ON:
+	case ANDROID_ALARM_POWER_ON_LOGO:
+		break;
+	default:
+		rv = -EINVAL;
+	}
+	return rv;
+}
+
+static long alarm_do_ioctl(struct file *file, unsigned int cmd,
+							struct timespec *ts, struct rtc_wkalrm *alm)
+{
+	int rv = 0;
+	unsigned long flags;
+	enum android_alarm_type alarm_type = ANDROID_ALARM_IOCTL_TO_TYPE(cmd);
+
+	alarm_dbg(INFO, "alarm_do_ioctl cmd:%d type:%d (%lu)\n",
+		cmd, alarm_type, (uintptr_t)file->private_data);
+
+	if (alarm_type >= ANDROID_ALARM_TYPE_COUNT &&
+		alarm_type != ANDROID_ALARM_POWER_ON &&
+		alarm_type != ANDROID_ALARM_POWER_ON_LOGO) {
+		return -EINVAL;
+	}
+
+	if (ANDROID_ALARM_BASE_CMD(cmd) != ANDROID_ALARM_GET_TIME(0)
+		&& ANDROID_ALARM_BASE_CMD(cmd) != ANDROID_ALARM_SET_IPO(0)
+		&& ANDROID_ALARM_BASE_CMD(cmd) != ANDROID_ALARM_GET_POWER_ON_IPO) {
+		if ((file->f_flags & O_ACCMODE) == O_RDONLY)
+			return -EPERM;
+		if (file->private_data == NULL &&
+		    cmd != ANDROID_ALARM_SET_RTC) {
+			spin_lock_irqsave(&alarm_slock, flags);
+			if (alarm_opened) {
+				spin_unlock_irqrestore(&alarm_slock, flags);
+				alarm_dbg(INFO, "alarm_do_ioctl EBUSY\n");
+				file->private_data = NULL;
+				return -EBUSY;
+			}
+			alarm_opened = 1;
+			file->private_data = (void *)1;
+			spin_unlock_irqrestore(&alarm_slock, flags);
+			alarm_dbg(INFO, "alarm_do_ioctl opened\n");
+		}
+	}
+
+	switch (ANDROID_ALARM_BASE_CMD(cmd)) {
+	case ANDROID_ALARM_CLEAR(0):
+		alarm_clear(alarm_type, ts);
+		break;
+	case ANDROID_ALARM_SET(0):
+		alarm_set(alarm_type, ts);
+		break;
+	case ANDROID_ALARM_SET_AND_WAIT(0):
+		alarm_set(alarm_type, ts);
+		/* fall though */
+	case ANDROID_ALARM_WAIT:
+		rv = alarm_wait();
+		break;
+	case ANDROID_ALARM_SET_IPO(0):
+		alarm_set(alarm_type, ts);
+		break;
+	case ANDROID_ALARM_SET_AND_WAIT_IPO(0):
+		alarm_set(alarm_type, ts);
+		/* fall though */
+	case ANDROID_ALARM_WAIT_IPO:
+		rv = alarm_wait();
+		break;
+	case ANDROID_ALARM_SET_RTC:
+		rv = alarm_set_rtc(ts);
+		break;
+	case ANDROID_ALARM_GET_TIME(0):
+		rv = alarm_get_time(alarm_type, ts);
+		break;
+	case ANDROID_ALARM_GET_POWER_ON:
+		alarm_get_power_on(alm);
+		break;
+	case ANDROID_ALARM_GET_POWER_ON_IPO:
+		alarm_get_power_on(alm);
+		break;
+
+	default:
+		rv = -EINVAL;
+	}
+	return rv;
+}
+
+static long alarm_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
+{
+
+	struct timespec ts;
+	struct rtc_wkalrm pwron_alm;
+
+	int rv;
+
+	switch (ANDROID_ALARM_BASE_CMD(cmd)) {
+	case ANDROID_ALARM_SET_AND_WAIT(0):
+	case ANDROID_ALARM_SET(0):
+	case ANDROID_ALARM_SET_RTC:
+	case ANDROID_ALARM_SET_IPO(0):
+		if (copy_from_user(&ts, (void __user *)arg, sizeof(ts)))
+			return -EFAULT;
+		break;
+	}
+
+	rv = alarm_do_ioctl(file, cmd, &ts, &pwron_alm);
+	if (rv)
+		return rv;
+
+	switch (ANDROID_ALARM_BASE_CMD(cmd)) {
+	case ANDROID_ALARM_GET_TIME(0):
+		if (copy_to_user((void __user *)arg, &ts, sizeof(ts)))
+			return -EFAULT;
+		break;
+	case ANDROID_ALARM_GET_POWER_ON:
+	case ANDROID_ALARM_GET_POWER_ON_IPO:
+		if (copy_to_user((void __user *)arg,
+			&pwron_alm, sizeof(struct rtc_wkalrm))) {
+			rv = -EFAULT;
+			return rv;
+		}
+		break;
+	default:
+		break;
+	}
+
+	return 0;
+}
+#ifdef CONFIG_COMPAT
+static long alarm_compat_ioctl(struct file *file, unsigned int cmd,
+							unsigned long arg)
+{
+
+	struct timespec ts;
+	struct rtc_wkalrm pwron_alm;
+	int rv;
+
+	switch (ANDROID_ALARM_BASE_CMD(cmd)) {
+	case ANDROID_ALARM_SET_AND_WAIT_COMPAT(0):
+	case ANDROID_ALARM_SET_COMPAT(0):
+	case ANDROID_ALARM_SET_RTC_COMPAT:
+	case ANDROID_ALARM_SET_IPO_COMPAT(0):
+		if (compat_get_timespec(&ts, (void __user *)arg))
+			return -EFAULT;
+		/* fall through */
+	case ANDROID_ALARM_GET_TIME_COMPAT(0):
+		cmd = ANDROID_ALARM_COMPAT_TO_NORM(cmd);
+		break;
+	}
+
+	rv = alarm_do_ioctl(file, cmd, &ts, &pwron_alm);
+	if (rv)
+		return rv;
+
+	switch (ANDROID_ALARM_BASE_CMD(cmd)) {
+	case ANDROID_ALARM_GET_TIME(0): /* NOTE: we modified cmd above */
+		if (compat_put_timespec(&ts, (void __user *)arg))
+			return -EFAULT;
+		break;
+
+	case ANDROID_ALARM_GET_POWER_ON:
+	case ANDROID_ALARM_GET_POWER_ON_IPO:
+		if (copy_to_user((void __user *)arg, &pwron_alm,
+			    sizeof(struct rtc_wkalrm))) {
+			rv = -EFAULT;
+			return rv;
+		}
+		break;
+
+	}
+	return 0;
+}
+#endif
+
+static int alarm_open(struct inode *inode, struct file *file)
+{
+	file->private_data = NULL;
+	alarm_dbg(INFO, "alarm_open (%d:%d)\n", current->tgid, current->pid);
+	return 0;
+}
+
+static int alarm_release(struct inode *inode, struct file *file)
+{
+	int i;
+	unsigned long flags;
+
+	spin_lock_irqsave(&alarm_slock, flags);
+	if (file->private_data) {
+		for (i = 0; i < ANDROID_ALARM_TYPE_COUNT; i++) {
+			uint32_t alarm_type_mask = 1U << i;
+
+			if (alarm_enabled & alarm_type_mask) {
+				alarm_dbg(INFO,
+					  "%s: clear alarm, pending %d\n",
+					  __func__,
+					  !!(alarm_pending & alarm_type_mask));
+				alarm_enabled &= ~alarm_type_mask;
+			}
+			spin_unlock_irqrestore(&alarm_slock, flags);
+			devalarm_cancel(&alarms[i]);
+			spin_lock_irqsave(&alarm_slock, flags);
+		}
+		if (alarm_pending | wait_pending) {
+			if (alarm_pending)
+				alarm_dbg(INFO, "%s: clear pending alarms %x\n",
+					  __func__, alarm_pending);
+			__pm_relax(&alarm_wake_lock);
+			wait_pending = 0;
+			alarm_pending = 0;
+		}
+		alarm_opened = 0;
+	}
+	spin_unlock_irqrestore(&alarm_slock, flags);
+	alarm_dbg(INFO, "alarm_release (%d:%d)(%lu)\n",
+		current->tgid, current->pid, (uintptr_t)file->private_data);
+	return 0;
+}
+
+static void devalarm_triggered(struct devalarm *alarm)
+{
+	unsigned long flags;
+	uint32_t alarm_type_mask = 1U << alarm->type;
+
+	alarm_dbg(INT, "%s: type %d\n", __func__, alarm->type);
+	spin_lock_irqsave(&alarm_slock, flags);
+	if (alarm_enabled & alarm_type_mask) {
+		__pm_wakeup_event(&alarm_wake_lock, 5000); /* 5secs */
+		alarm_enabled &= ~alarm_type_mask;
+		alarm_pending |= alarm_type_mask;
+		wake_up(&alarm_wait_queue);
+	}
+	spin_unlock_irqrestore(&alarm_slock, flags);
+}
+
+
+static enum hrtimer_restart devalarm_hrthandler(struct hrtimer *hrt)
+{
+	struct devalarm *devalrm = container_of(hrt, struct devalarm, u.hrt);
+
+	alarm_dbg(INT,  "devalarm_hrthandler\n");
+	devalarm_triggered(devalrm);
+	return HRTIMER_NORESTART;
+}
+
+static enum alarmtimer_restart devalarm_alarmhandler(struct alarm *alrm,
+							ktime_t now)
+{
+	struct devalarm *devalrm = container_of(alrm, struct devalarm, u.alrm);
+
+	alarm_dbg(INT, "devalarm_alarmhandler\n");
+	devalarm_triggered(devalrm);
+	return ALARMTIMER_NORESTART;
+}
+
+
+static const struct file_operations alarm_fops = {
+	.owner = THIS_MODULE,
+	.unlocked_ioctl = alarm_ioctl,
+	.open = alarm_open,
+	.release = alarm_release,
+#ifdef CONFIG_COMPAT
+	.compat_ioctl = alarm_compat_ioctl,
+#endif
+};
+
+static struct miscdevice alarm_device = {
+	.minor = MISC_DYNAMIC_MINOR,
+	.name = "alarm",
+	.fops = &alarm_fops,
+};
+
+static int __init alarm_dev_init(void)
+{
+	int err;
+	int i;
+
+	err = misc_register(&alarm_device);
+	if (err)
+		return err;
+
+	alarm_init(&alarms[ANDROID_ALARM_RTC_WAKEUP].u.alrm,
+			ALARM_REALTIME, devalarm_alarmhandler);
+	hrtimer_init(&alarms[ANDROID_ALARM_RTC].u.hrt,
+			CLOCK_REALTIME, HRTIMER_MODE_ABS);
+	alarm_init(&alarms[ANDROID_ALARM_ELAPSED_REALTIME_WAKEUP].u.alrm,
+			ALARM_BOOTTIME, devalarm_alarmhandler);
+	hrtimer_init(&alarms[ANDROID_ALARM_ELAPSED_REALTIME].u.hrt,
+			CLOCK_BOOTTIME, HRTIMER_MODE_ABS);
+	hrtimer_init(&alarms[ANDROID_ALARM_SYSTEMTIME].u.hrt,
+			CLOCK_MONOTONIC, HRTIMER_MODE_ABS);
+
+	for (i = 0; i < ANDROID_ALARM_TYPE_COUNT; i++) {
+		alarms[i].type = i;
+		if (!is_wakeup(i))
+			alarms[i].u.hrt.function = devalarm_hrthandler;
+	}
+
+	wakeup_source_init(&alarm_wake_lock, "alarm");
+	return 0;
+}
+
+static void  __exit alarm_dev_exit(void)
+{
+	misc_deregister(&alarm_device);
+	wakeup_source_trash(&alarm_wake_lock);
+}
+
+module_init(alarm_dev_init);
+module_exit(alarm_dev_exit);
+
diff --git a/drivers/staging/android/android_alarm.h b/drivers/staging/android/android_alarm.h
new file mode 100644
index 000000000..c68999acc
--- /dev/null
+++ b/drivers/staging/android/android_alarm.h
@@ -0,0 +1,99 @@
+/* drivers/staging/android/uapi/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 _UAPI_LINUX_ANDROID_ALARM_H
+#define _UAPI_LINUX_ANDROID_ALARM_H
+
+#include <linux/ioctl.h>
+#include <linux/time.h>
+#include <linux/compat.h>
+
+extern void rtc_read_pwron_alarm(struct rtc_wkalrm *alm);
+extern int rtc_set_alarm_poweron(struct rtc_device *rtc, struct rtc_wkalrm *alarm);
+
+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,
+
+	ANDROID_ALARM_POWER_ON = 6,
+	ANDROID_ALARM_POWER_ON_LOGO = 7,
+	/* return code bit numbers */
+	/* ANDROID_ALARM_TIME_CHANGE = 16 */
+};
+
+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)
+#define ANDROID_ALARM_GET_POWER_ON          _IOR('a', 7, struct rtc_wkalrm)
+#define ANDROID_ALARM_SET_IPO(type)             ALARM_IOW(8, type, struct timespec)
+#define ANDROID_ALARM_SET_AND_WAIT_IPO(type)    ALARM_IOW(9, type, struct timespec)
+#define ANDROID_ALARM_GET_POWER_ON_IPO          _IOR('a', 10, struct rtc_wkalrm)
+#define ANDROID_ALARM_WAIT_IPO                  _IO('a', 11)
+
+extern struct rtc_device *alarmtimer_get_rtcdev(void);
+
+#ifdef CONFIG_COMPAT
+#define ANDROID_ALARM_SET_COMPAT(type)		ALARM_IOW(2, type, \
+							struct compat_timespec)
+#define ANDROID_ALARM_SET_AND_WAIT_COMPAT(type)	ALARM_IOW(3, type, \
+							struct compat_timespec)
+#define ANDROID_ALARM_GET_TIME_COMPAT(type)	ALARM_IOW(4, type, \
+							struct compat_timespec)
+#define ANDROID_ALARM_SET_RTC_COMPAT		_IOW('a', 5, \
+							struct compat_timespec)
+#define ANDROID_ALARM_SET_IPO_COMPAT(type)		ALARM_IOW(8, type, \
+							struct compat_timespec)
+#define ANDROID_ALARM_SET_AND_WAIT_IPO_COMPAT(type)		ALARM_IOW(9, type, \
+							struct compat_timespec)
+#define ANDROID_ALARM_IOCTL_NR(cmd)		(_IOC_NR(cmd) & ((1<<4)-1))
+#define ANDROID_ALARM_COMPAT_TO_NORM(cmd)  \
+				ALARM_IOW(ANDROID_ALARM_IOCTL_NR(cmd), \
+					ANDROID_ALARM_IOCTL_TO_TYPE(cmd), \
+					struct timespec)
+
+#endif
+
+extern void alarm_set_power_on(struct timespec new_pwron_time, bool logo);
+extern void alarm_get_power_on(struct rtc_wkalrm *alm);
+
+#endif