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Date: Fri, 20 Apr 2012 12:31:46 -0700
From: John Stultz <john.stultz@...aro.org>
To: Linux Kernel <linux-kernel@...r.kernel.org>
Cc: John Stultz <john.stultz@...aro.org>,
Colin Cross <ccross@...roid.com>,
Thomas Gleixner <tglx@...utronix.de>,
Greg KH <gregkh@...uxfoundation.org>,
Android Kernel Team <kernel-team@...roid.com>
Subject: [PATCH 3/4] android-alarm: Rework alarm-dev.c to use upstreamed alarmtimers
This reworks the alarm-dev.c to use the upstreamed alarmtimers
interface.
CC: Colin Cross <ccross@...roid.com>
CC: Thomas Gleixner <tglx@...utronix.de>
CC: Greg KH <gregkh@...uxfoundation.org>
CC: Android Kernel Team <kernel-team@...roid.com>
Signed-off-by: John Stultz <john.stultz@...aro.org>
---
drivers/staging/android/alarm-dev.c | 108 +++++++++++++++++++++++++++++++---
1 files changed, 98 insertions(+), 10 deletions(-)
diff --git a/drivers/staging/android/alarm-dev.c b/drivers/staging/android/alarm-dev.c
index bc57568..7739029 100644
--- a/drivers/staging/android/alarm-dev.c
+++ b/drivers/staging/android/alarm-dev.c
@@ -22,6 +22,7 @@
#include <linux/sched.h>
#include <linux/spinlock.h>
#include <linux/uaccess.h>
+#include <linux/alarmtimer.h>
#include "android_alarm.h"
/* XXX - Hack out wakelocks, while they are out of tree */
@@ -66,7 +67,53 @@ static uint32_t alarm_pending;
static uint32_t alarm_enabled;
static uint32_t wait_pending;
-static struct android_alarm alarms[ANDROID_ALARM_TYPE_COUNT];
+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)
+{
+ if (type == ANDROID_ALARM_RTC_WAKEUP ||
+ type == ANDROID_ALARM_ELAPSED_REALTIME_WAKEUP)
+ return 1;
+ return 0;
+}
+
+
+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)
+{
+ int ret;
+ if (is_wakeup(alrm->type))
+ ret = alarm_try_to_cancel(&alrm->u.alrm);
+ else
+ ret = hrtimer_try_to_cancel(&alrm->u.hrt);
+ return ret;
+}
+
+static void devalarm_cancel(struct devalarm *alrm)
+{
+ if (is_wakeup(alrm->type))
+ alarm_cancel(&alrm->u.alrm);
+ else
+ hrtimer_cancel(&alrm->u.hrt);
+}
+
static long alarm_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
{
@@ -75,6 +122,8 @@ static long alarm_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
struct timespec new_alarm_time;
struct timespec new_rtc_time;
struct timespec tmp_time;
+ struct rtc_time new_rtc_tm;
+ struct rtc_device *rtc_dev;
enum android_alarm_type alarm_type = ANDROID_ALARM_IOCTL_TO_TYPE(cmd);
uint32_t alarm_type_mask = 1U << alarm_type;
@@ -101,7 +150,7 @@ static long alarm_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
case ANDROID_ALARM_CLEAR(0):
spin_lock_irqsave(&alarm_slock, flags);
pr_alarm(IO, "alarm %d clear\n", alarm_type);
- android_alarm_try_to_cancel(&alarms[alarm_type]);
+ devalarm_try_to_cancel(&alarms[alarm_type]);
if (alarm_pending) {
alarm_pending &= ~alarm_type_mask;
if (!alarm_pending && !wait_pending)
@@ -132,8 +181,7 @@ from_old_alarm_set:
pr_alarm(IO, "alarm %d set %ld.%09ld\n", alarm_type,
new_alarm_time.tv_sec, new_alarm_time.tv_nsec);
alarm_enabled |= alarm_type_mask;
- android_alarm_start_range(&alarms[alarm_type],
- timespec_to_ktime(new_alarm_time),
+ devalarm_start(&alarms[alarm_type],
timespec_to_ktime(new_alarm_time));
spin_unlock_irqrestore(&alarm_slock, flags);
if (ANDROID_ALARM_BASE_CMD(cmd) != ANDROID_ALARM_SET_AND_WAIT(0)
@@ -163,7 +211,13 @@ from_old_alarm_set:
rv = -EFAULT;
goto err1;
}
- rv = android_alarm_set_rtc(new_rtc_time);
+ rtc_time_to_tm(new_rtc_time.tv_sec, &new_rtc_tm);
+ rtc_dev = alarmtimer_get_rtcdev();
+ rv = do_settimeofday(&new_rtc_time);
+ if (rv < 0)
+ goto err1;
+ 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);
@@ -223,7 +277,7 @@ static int alarm_release(struct inode *inode, struct file *file)
alarm_enabled &= ~alarm_type_mask;
}
spin_unlock_irqrestore(&alarm_slock, flags);
- android_alarm_cancel(&alarms[i]);
+ devalarm_cancel(&alarms[i]);
spin_lock_irqsave(&alarm_slock, flags);
}
if (alarm_pending | wait_pending) {
@@ -240,12 +294,12 @@ static int alarm_release(struct inode *inode, struct file *file)
return 0;
}
-static void alarm_triggered(struct android_alarm *alarm)
+static void devalarm_triggered(struct devalarm *alarm)
{
unsigned long flags;
uint32_t alarm_type_mask = 1U << alarm->type;
- pr_alarm(INT, "alarm_triggered type %d\n", alarm->type);
+ pr_alarm(INT, "devalarm_triggered type %d\n", alarm->type);
spin_lock_irqsave(&alarm_slock, flags);
if (alarm_enabled & alarm_type_mask) {
wake_lock_timeout(&alarm_wake_lock, 5 * HZ);
@@ -256,6 +310,25 @@ static void alarm_triggered(struct android_alarm *alarm)
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);
+
+ 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);
+
+ devalarm_triggered(devalrm);
+ return ALARMTIMER_NORESTART;
+}
+
+
static const struct file_operations alarm_fops = {
.owner = THIS_MODULE,
.unlocked_ioctl = alarm_ioctl,
@@ -278,8 +351,23 @@ static int __init alarm_dev_init(void)
if (err)
return err;
- for (i = 0; i < ANDROID_ALARM_TYPE_COUNT; i++)
- android_alarm_init(&alarms[i], i, alarm_triggered);
+ 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;
+ }
+
wake_lock_init(&alarm_wake_lock, WAKE_LOCK_SUSPEND, "alarm");
return 0;
--
1.7.3.2.146.gca209
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