mirror of https://gitee.com/openkylin/linux.git
staging: 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@android.com> CC: Thomas Gleixner <tglx@linutronix.de> CC: Android Kernel Team <kernel-team@android.com> Signed-off-by: John Stultz <john.stultz@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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@ -22,6 +22,7 @@
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#include <linux/sched.h>
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#include <linux/spinlock.h>
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#include <linux/uaccess.h>
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#include <linux/alarmtimer.h>
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#include "android_alarm.h"
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/* XXX - Hack out wakelocks, while they are out of tree */
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@ -66,7 +67,53 @@ static uint32_t alarm_pending;
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static uint32_t alarm_enabled;
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static uint32_t wait_pending;
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static struct android_alarm alarms[ANDROID_ALARM_TYPE_COUNT];
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struct devalarm {
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union {
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struct hrtimer hrt;
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struct alarm alrm;
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} u;
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enum android_alarm_type type;
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};
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static struct devalarm alarms[ANDROID_ALARM_TYPE_COUNT];
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static int is_wakeup(enum android_alarm_type type)
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{
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if (type == ANDROID_ALARM_RTC_WAKEUP ||
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type == ANDROID_ALARM_ELAPSED_REALTIME_WAKEUP)
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return 1;
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return 0;
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}
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static void devalarm_start(struct devalarm *alrm, ktime_t exp)
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{
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if (is_wakeup(alrm->type))
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alarm_start(&alrm->u.alrm, exp);
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else
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hrtimer_start(&alrm->u.hrt, exp, HRTIMER_MODE_ABS);
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}
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static int devalarm_try_to_cancel(struct devalarm *alrm)
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{
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int ret;
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if (is_wakeup(alrm->type))
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ret = alarm_try_to_cancel(&alrm->u.alrm);
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else
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ret = hrtimer_try_to_cancel(&alrm->u.hrt);
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return ret;
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}
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static void devalarm_cancel(struct devalarm *alrm)
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{
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if (is_wakeup(alrm->type))
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alarm_cancel(&alrm->u.alrm);
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else
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hrtimer_cancel(&alrm->u.hrt);
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}
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static long alarm_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
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{
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@ -75,6 +122,8 @@ static long alarm_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
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struct timespec new_alarm_time;
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struct timespec new_rtc_time;
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struct timespec tmp_time;
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struct rtc_time new_rtc_tm;
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struct rtc_device *rtc_dev;
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enum android_alarm_type alarm_type = ANDROID_ALARM_IOCTL_TO_TYPE(cmd);
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uint32_t alarm_type_mask = 1U << alarm_type;
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@ -101,7 +150,7 @@ static long alarm_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
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case ANDROID_ALARM_CLEAR(0):
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spin_lock_irqsave(&alarm_slock, flags);
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pr_alarm(IO, "alarm %d clear\n", alarm_type);
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android_alarm_try_to_cancel(&alarms[alarm_type]);
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devalarm_try_to_cancel(&alarms[alarm_type]);
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if (alarm_pending) {
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alarm_pending &= ~alarm_type_mask;
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if (!alarm_pending && !wait_pending)
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@ -132,8 +181,7 @@ static long alarm_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
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pr_alarm(IO, "alarm %d set %ld.%09ld\n", alarm_type,
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new_alarm_time.tv_sec, new_alarm_time.tv_nsec);
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alarm_enabled |= alarm_type_mask;
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android_alarm_start_range(&alarms[alarm_type],
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timespec_to_ktime(new_alarm_time),
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devalarm_start(&alarms[alarm_type],
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timespec_to_ktime(new_alarm_time));
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spin_unlock_irqrestore(&alarm_slock, flags);
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if (ANDROID_ALARM_BASE_CMD(cmd) != ANDROID_ALARM_SET_AND_WAIT(0)
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@ -163,7 +211,13 @@ static long alarm_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
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rv = -EFAULT;
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goto err1;
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}
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rv = android_alarm_set_rtc(new_rtc_time);
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rtc_time_to_tm(new_rtc_time.tv_sec, &new_rtc_tm);
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rtc_dev = alarmtimer_get_rtcdev();
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rv = do_settimeofday(&new_rtc_time);
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if (rv < 0)
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goto err1;
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if (rtc_dev)
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rv = rtc_set_time(rtc_dev, &new_rtc_tm);
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spin_lock_irqsave(&alarm_slock, flags);
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alarm_pending |= ANDROID_ALARM_TIME_CHANGE_MASK;
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wake_up(&alarm_wait_queue);
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@ -223,7 +277,7 @@ static int alarm_release(struct inode *inode, struct file *file)
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alarm_enabled &= ~alarm_type_mask;
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}
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spin_unlock_irqrestore(&alarm_slock, flags);
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android_alarm_cancel(&alarms[i]);
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devalarm_cancel(&alarms[i]);
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spin_lock_irqsave(&alarm_slock, flags);
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}
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if (alarm_pending | wait_pending) {
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@ -240,12 +294,12 @@ static int alarm_release(struct inode *inode, struct file *file)
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return 0;
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}
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static void alarm_triggered(struct android_alarm *alarm)
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static void devalarm_triggered(struct devalarm *alarm)
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{
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unsigned long flags;
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uint32_t alarm_type_mask = 1U << alarm->type;
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pr_alarm(INT, "alarm_triggered type %d\n", alarm->type);
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pr_alarm(INT, "devalarm_triggered type %d\n", alarm->type);
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spin_lock_irqsave(&alarm_slock, flags);
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if (alarm_enabled & alarm_type_mask) {
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wake_lock_timeout(&alarm_wake_lock, 5 * HZ);
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@ -256,6 +310,25 @@ static void alarm_triggered(struct android_alarm *alarm)
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spin_unlock_irqrestore(&alarm_slock, flags);
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}
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static enum hrtimer_restart devalarm_hrthandler(struct hrtimer *hrt)
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{
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struct devalarm *devalrm = container_of(hrt, struct devalarm, u.hrt);
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devalarm_triggered(devalrm);
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return HRTIMER_NORESTART;
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}
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static enum alarmtimer_restart devalarm_alarmhandler(struct alarm *alrm,
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ktime_t now)
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{
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struct devalarm *devalrm = container_of(alrm, struct devalarm, u.alrm);
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devalarm_triggered(devalrm);
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return ALARMTIMER_NORESTART;
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}
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static const struct file_operations alarm_fops = {
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.owner = THIS_MODULE,
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.unlocked_ioctl = alarm_ioctl,
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@ -278,8 +351,23 @@ static int __init alarm_dev_init(void)
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if (err)
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return err;
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for (i = 0; i < ANDROID_ALARM_TYPE_COUNT; i++)
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android_alarm_init(&alarms[i], i, alarm_triggered);
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alarm_init(&alarms[ANDROID_ALARM_RTC_WAKEUP].u.alrm,
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ALARM_REALTIME, devalarm_alarmhandler);
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hrtimer_init(&alarms[ANDROID_ALARM_RTC].u.hrt,
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CLOCK_REALTIME, HRTIMER_MODE_ABS);
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alarm_init(&alarms[ANDROID_ALARM_ELAPSED_REALTIME_WAKEUP].u.alrm,
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ALARM_BOOTTIME, devalarm_alarmhandler);
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hrtimer_init(&alarms[ANDROID_ALARM_ELAPSED_REALTIME].u.hrt,
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CLOCK_BOOTTIME, HRTIMER_MODE_ABS);
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hrtimer_init(&alarms[ANDROID_ALARM_SYSTEMTIME].u.hrt,
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CLOCK_MONOTONIC, HRTIMER_MODE_ABS);
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for (i = 0; i < ANDROID_ALARM_TYPE_COUNT; i++) {
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alarms[i].type = i;
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if (!is_wakeup(i))
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alarms[i].u.hrt.function = devalarm_hrthandler;
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}
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wake_lock_init(&alarm_wake_lock, WAKE_LOCK_SUSPEND, "alarm");
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return 0;
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