diff options
Diffstat (limited to 'drivers/android/alarm.c')
-rw-r--r-- | drivers/android/alarm.c | 542 |
1 files changed, 0 insertions, 542 deletions
diff --git a/drivers/android/alarm.c b/drivers/android/alarm.c deleted file mode 100644 index 317e2c648f5..00000000000 --- a/drivers/android/alarm.c +++ /dev/null @@ -1,542 +0,0 @@ -/* drivers/android/alarm.c - * - * Copyright (C) 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. - * - */ - -#include <asm/mach/time.h> -#include <linux/android_alarm.h> -#include <linux/android_power.h> -#include <linux/device.h> -#include <linux/miscdevice.h> -#include <linux/platform_device.h> -#include <linux/rtc.h> -#include <linux/spinlock.h> -#include <linux/sysdev.h> - -#define ANDROID_ALARM_PRINT_ERRORS (1U << 0) -#define ANDROID_ALARM_PRINT_INIT_STATUS (1U << 1) -#define ANDROID_ALARM_PRINT_INFO (1U << 2) -#define ANDROID_ALARM_PRINT_IO (1U << 3) -#define ANDROID_ALARM_PRINT_INT (1U << 4) -#define ANDROID_ALARM_PRINT_FLOW (1U << 5) - -#if 0 -#define ANDROID_ALARM_DPRINTF_MASK (~0) -#define ANDROID_ALARM_DPRINTF(debug_level_mask, args...) \ - do { \ - if(ANDROID_ALARM_DPRINTF_MASK & debug_level_mask) { \ - printk(args); \ - } \ - } while(0) -#else -#define ANDROID_ALARM_DPRINTF(args...) -#endif - -// support old usespace code -#define ANDROID_ALARM_SET_OLD _IOW('a', 2, time_t) // set alarm -#define ANDROID_ALARM_SET_AND_WAIT_OLD _IOW('a', 3, time_t) - -static struct rtc_device *alarm_rtc_dev; -static int alarm_opened; -static DEFINE_SPINLOCK(alarm_slock); -static DEFINE_MUTEX(alarm_setrtc_mutex); -static android_suspend_lock_t alarm_suspend_lock = { - .name = "android_alarm" -}; -static android_suspend_lock_t alarm_rtc_suspend_lock = { - .name = "android_alarm_rtc" -}; -static DECLARE_WAIT_QUEUE_HEAD(alarm_wait_queue); -static uint32_t alarm_pending; -static uint32_t alarm_enabled; -static uint32_t wait_pending; -static struct platform_device *alarm_platform_dev; -static struct hrtimer alarm_timer[ANDROID_ALARM_TYPE_COUNT]; -static struct timespec alarm_time[ANDROID_ALARM_TYPE_COUNT]; -static struct timespec elapsed_rtc_delta; - -static void alarm_start_hrtimer(android_alarm_type_t alarm_type) -{ - struct timespec hr_alarm_time; - if(!(alarm_enabled & (1U << alarm_type))) - return; - hr_alarm_time = alarm_time[alarm_type]; - if(alarm_type == ANDROID_ALARM_ELAPSED_REALTIME_WAKEUP || alarm_type == ANDROID_ALARM_ELAPSED_REALTIME) - set_normalized_timespec(&hr_alarm_time, hr_alarm_time.tv_sec + elapsed_rtc_delta.tv_sec, - hr_alarm_time.tv_nsec + elapsed_rtc_delta.tv_nsec); - ANDROID_ALARM_DPRINTF(ANDROID_ALARM_PRINT_FLOW, "alarm start hrtimer %d at %ld.%09ld\n", alarm_type, hr_alarm_time.tv_sec, hr_alarm_time.tv_nsec); - hrtimer_start(&alarm_timer[alarm_type], timespec_to_ktime(hr_alarm_time), HRTIMER_MODE_ABS); -} - -static long alarm_ioctl(struct file *file, unsigned int cmd, unsigned long arg) -{ - int rv = 0; - unsigned long flags; - int i; - struct timespec new_alarm_time; - struct timespec new_rtc_time; - struct timespec tmp_time; - struct rtc_time rtc_new_rtc_time; - android_alarm_type_t alarm_type = ANDROID_ALARM_IOCTL_TO_TYPE(cmd); - uint32_t alarm_type_mask = 1U << alarm_type; - - if(alarm_type >= ANDROID_ALARM_TYPE_COUNT) - return -EINVAL; - - if(ANDROID_ALARM_BASE_CMD(cmd) != ANDROID_ALARM_GET_TIME(0)) { - 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); - return -EBUSY; - } - alarm_opened = 1; - file->private_data = (void *)1; - spin_unlock_irqrestore(&alarm_slock, flags); - } - } - - switch(ANDROID_ALARM_BASE_CMD(cmd)) { - //case ANDROID_ALARM_CLEAR_OLD: // same as ANDROID_ALARM_CLEAR(0) - case ANDROID_ALARM_CLEAR(0): - spin_lock_irqsave(&alarm_slock, flags); - ANDROID_ALARM_DPRINTF(ANDROID_ALARM_PRINT_IO, "alarm %d clear\n", alarm_type); - hrtimer_try_to_cancel(&alarm_timer[alarm_type]); - if(alarm_pending) { - alarm_pending &= ~alarm_type_mask; - if(!alarm_pending && !wait_pending) { - android_unlock_suspend(&alarm_suspend_lock); - } - } - alarm_enabled &= ~alarm_type_mask; - spin_unlock_irqrestore(&alarm_slock, flags); - break; - - case ANDROID_ALARM_SET_OLD: - case ANDROID_ALARM_SET_AND_WAIT_OLD: - if(get_user(new_alarm_time.tv_sec, (int __user *)arg)) { - rv = -EFAULT; - goto err1; - } - new_alarm_time.tv_nsec = 0; - goto from_old_alarm_set; - - case ANDROID_ALARM_SET_AND_WAIT(0): - case ANDROID_ALARM_SET(0): - if(copy_from_user(&new_alarm_time, (void __user *)arg, sizeof(new_alarm_time))) { - rv = -EFAULT; - goto err1; - } -from_old_alarm_set: - spin_lock_irqsave(&alarm_slock, flags); - ANDROID_ALARM_DPRINTF(ANDROID_ALARM_PRINT_IO, "alarm %d set %ld.%09ld\n", alarm_type, new_alarm_time.tv_sec, new_alarm_time.tv_nsec); - alarm_time[alarm_type] = new_alarm_time; - alarm_enabled |= alarm_type_mask; - alarm_start_hrtimer(alarm_type); - spin_unlock_irqrestore(&alarm_slock, flags); - if(ANDROID_ALARM_BASE_CMD(cmd) != ANDROID_ALARM_SET_AND_WAIT(0) && cmd != ANDROID_ALARM_SET_AND_WAIT_OLD) - break; - // fall though - case ANDROID_ALARM_WAIT: - spin_lock_irqsave(&alarm_slock, flags); - ANDROID_ALARM_DPRINTF(ANDROID_ALARM_PRINT_IO, "alarm wait\n"); - if(!alarm_pending && wait_pending) { - android_unlock_suspend(&alarm_suspend_lock); - wait_pending = 0; - } - spin_unlock_irqrestore(&alarm_slock, flags); - rv = wait_event_interruptible(alarm_wait_queue, alarm_pending); - if(rv) - goto err1; - spin_lock_irqsave(&alarm_slock, flags); - rv = alarm_pending; - wait_pending = 1; - alarm_pending = 0; - if(rv & (ANDROID_ALARM_RTC_WAKEUP_MASK | ANDROID_ALARM_ELAPSED_REALTIME_WAKEUP_MASK)) { - android_unlock_suspend(&alarm_rtc_suspend_lock); - } - spin_unlock_irqrestore(&alarm_slock, flags); - break; - case ANDROID_ALARM_SET_RTC: - if(copy_from_user(&new_rtc_time, (void __user *)arg, sizeof(new_rtc_time))) { - rv = -EFAULT; - goto err1; - } - rtc_time_to_tm(new_rtc_time.tv_sec, &rtc_new_rtc_time); - - ANDROID_ALARM_DPRINTF(ANDROID_ALARM_PRINT_IO, - "set rtc %ld %ld - rtc %02d:%02d:%02d %02d/%02d/%04d\n", - new_rtc_time.tv_sec, new_rtc_time.tv_nsec, - rtc_new_rtc_time.tm_hour, rtc_new_rtc_time.tm_min, - rtc_new_rtc_time.tm_sec, rtc_new_rtc_time.tm_mon + 1, - rtc_new_rtc_time.tm_mday, rtc_new_rtc_time.tm_year + 1900); - - mutex_lock(&alarm_setrtc_mutex); - spin_lock_irqsave(&alarm_slock, flags); - for (i = 0; i < ANDROID_ALARM_SYSTEMTIME; i++) - hrtimer_try_to_cancel(&alarm_timer[i]); - getnstimeofday(&tmp_time); - elapsed_rtc_delta = timespec_sub(elapsed_rtc_delta, timespec_sub(tmp_time, new_rtc_time)); - spin_unlock_irqrestore(&alarm_slock, flags); - rv = do_settimeofday(&new_rtc_time); - spin_lock_irqsave(&alarm_slock, flags); - for (i = 0; i < ANDROID_ALARM_SYSTEMTIME; i++) - alarm_start_hrtimer(i); - spin_unlock_irqrestore(&alarm_slock, flags); - if(rv < 0) { - ANDROID_ALARM_DPRINTF(ANDROID_ALARM_PRINT_ERRORS, "Failed to set time\n"); - mutex_unlock(&alarm_setrtc_mutex); - goto err1; - } - rv = rtc_set_time(alarm_rtc_dev, &rtc_new_rtc_time); - spin_lock_irqsave(&alarm_slock, flags); - alarm_pending |= ANDROID_ALARM_TIME_CHANGE_MASK; - wake_up(&alarm_wait_queue); - spin_unlock_irqrestore(&alarm_slock, flags); - mutex_unlock(&alarm_setrtc_mutex); - if(rv < 0) { - ANDROID_ALARM_DPRINTF(ANDROID_ALARM_PRINT_ERRORS, "Failed to set RTC, time will be lost on reboot\n"); - goto err1; - } - break; - case ANDROID_ALARM_GET_TIME(0): - mutex_lock(&alarm_setrtc_mutex); - spin_lock_irqsave(&alarm_slock, flags); - if(alarm_type != ANDROID_ALARM_SYSTEMTIME) { - getnstimeofday(&tmp_time); - if(alarm_type >= ANDROID_ALARM_ELAPSED_REALTIME_WAKEUP) { - tmp_time = timespec_sub(tmp_time, elapsed_rtc_delta); - } - } - else - ktime_get_ts(&tmp_time); - spin_unlock_irqrestore(&alarm_slock, flags); - mutex_unlock(&alarm_setrtc_mutex); - if(copy_to_user((void __user *)arg, &tmp_time, sizeof(tmp_time))) { - rv = -EFAULT; - goto err1; - } - break; - - default: - rv = -EINVAL; - goto err1; - } -err1: - return rv; -} - -static int alarm_open(struct inode *inode, struct file *file) -{ - file->private_data = NULL; - 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 != 0) { - for(i = 0; i < ANDROID_ALARM_TYPE_COUNT; i++) { - uint32_t alarm_type_mask = 1U << i; - if(alarm_enabled & alarm_type_mask) { - ANDROID_ALARM_DPRINTF(ANDROID_ALARM_PRINT_INFO, "alarm_release: clear alarm, pending %d\n", !!(alarm_pending & alarm_type_mask)); - alarm_enabled &= ~alarm_type_mask; - } - spin_unlock_irqrestore(&alarm_slock, flags); - hrtimer_cancel(&alarm_timer[i]); - spin_lock_irqsave(&alarm_slock, flags); - } - if(alarm_pending | wait_pending) { - if(alarm_pending) - ANDROID_ALARM_DPRINTF(ANDROID_ALARM_PRINT_INFO, "alarm_release: clear pending alarms %x\n", alarm_pending); - android_unlock_suspend(&alarm_suspend_lock); - wait_pending = 0; - alarm_pending = 0; - } - alarm_opened = 0; - } - spin_unlock_irqrestore(&alarm_slock, flags); - return 0; -} - -static enum hrtimer_restart alarm_timer_triggered(struct hrtimer *timer) -{ - unsigned long flags; - android_alarm_type_t alarm_type = (timer - alarm_timer); - uint32_t alarm_type_mask = 1U << alarm_type; - - - ANDROID_ALARM_DPRINTF(ANDROID_ALARM_PRINT_INT, "alarm_timer_triggered type %d\n", alarm_type); - spin_lock_irqsave(&alarm_slock, flags); - if (alarm_enabled & alarm_type_mask) { - android_lock_suspend_auto_expire(&alarm_suspend_lock, 5 * HZ); - alarm_enabled &= ~alarm_type_mask; - alarm_pending |= alarm_type_mask; - wake_up(&alarm_wait_queue); - } - spin_unlock_irqrestore(&alarm_slock, flags); - return HRTIMER_NORESTART; -} - -static void alarm_triggered_func(void *p) -{ -// unsigned long flags; - - struct rtc_device *rtc = alarm_rtc_dev; - if(rtc->irq_data & RTC_AF) { - ANDROID_ALARM_DPRINTF(ANDROID_ALARM_PRINT_INT, "alarm_triggered_func:\n"); - android_lock_suspend_auto_expire(&alarm_rtc_suspend_lock, 1 * HZ); - } -} - -int alarm_suspend(struct platform_device *pdev, pm_message_t state) -{ - int err = 0; - unsigned long flags; - struct rtc_wkalrm rtc_alarm; - struct rtc_time rtc_current_rtc_time; - unsigned long rtc_current_time; - unsigned long rtc_alarm_time; - struct timespec rtc_current_timespec; - struct timespec rtc_delta; - struct timespec elapsed_realtime_alarm_time; - - ANDROID_ALARM_DPRINTF(ANDROID_ALARM_PRINT_FLOW, "alarm_suspend(%p, %d)\n", pdev, state.event); - spin_lock_irqsave(&alarm_slock, flags); - if(alarm_pending && (alarm_suspend_lock.flags & ANDROID_SUSPEND_LOCK_AUTO_EXPIRE)) { - ANDROID_ALARM_DPRINTF(ANDROID_ALARM_PRINT_INFO, "alarm pending\n"); - err = -EBUSY; - goto err1; - } - if(alarm_enabled & (ANDROID_ALARM_RTC_WAKEUP_MASK | ANDROID_ALARM_ELAPSED_REALTIME_WAKEUP_MASK)) { - spin_unlock_irqrestore(&alarm_slock, flags); - if(alarm_enabled & ANDROID_ALARM_RTC_WAKEUP_MASK) - hrtimer_cancel(&alarm_timer[ANDROID_ALARM_RTC_WAKEUP]); - if(alarm_enabled & ANDROID_ALARM_ELAPSED_REALTIME_WAKEUP_MASK) - hrtimer_cancel(&alarm_timer[ANDROID_ALARM_ELAPSED_REALTIME_WAKEUP]); - - rtc_read_time(alarm_rtc_dev, &rtc_current_rtc_time); - rtc_current_timespec.tv_nsec = 0; - rtc_tm_to_time(&rtc_current_rtc_time, &rtc_current_timespec.tv_sec); - save_time_delta(&rtc_delta, &rtc_current_timespec); - set_normalized_timespec(&elapsed_realtime_alarm_time, - alarm_time[ANDROID_ALARM_ELAPSED_REALTIME_WAKEUP].tv_sec + elapsed_rtc_delta.tv_sec, - alarm_time[ANDROID_ALARM_ELAPSED_REALTIME_WAKEUP].tv_nsec + elapsed_rtc_delta.tv_nsec); - if((alarm_enabled & ANDROID_ALARM_RTC_WAKEUP_MASK) && - (!(alarm_enabled & ANDROID_ALARM_ELAPSED_REALTIME_WAKEUP_MASK) - || timespec_compare(&alarm_time[ANDROID_ALARM_RTC_WAKEUP], &elapsed_realtime_alarm_time) < 0)) - rtc_alarm_time = timespec_sub(alarm_time[ANDROID_ALARM_RTC_WAKEUP], rtc_delta).tv_sec; - else { - rtc_alarm_time = timespec_sub(elapsed_realtime_alarm_time, rtc_delta).tv_sec; - } - rtc_time_to_tm(rtc_alarm_time, &rtc_alarm.time); - rtc_alarm.enabled = 1; - rtc_set_alarm(alarm_rtc_dev, &rtc_alarm); - rtc_read_time(alarm_rtc_dev, &rtc_current_rtc_time); - rtc_tm_to_time(&rtc_current_rtc_time, &rtc_current_time); - ANDROID_ALARM_DPRINTF(ANDROID_ALARM_PRINT_INFO, - "rtc alarm set at %ld, now %ld, rtc delta %ld.%09ld\n", - rtc_alarm_time, rtc_current_time, - rtc_delta.tv_sec, rtc_delta.tv_nsec); - if(rtc_current_time + 1 >= rtc_alarm_time) { - //spin_lock_irqsave(&alarm_slock, flags); - ANDROID_ALARM_DPRINTF(ANDROID_ALARM_PRINT_INFO, "alarm about to go off\n"); - memset(&rtc_alarm, 0, sizeof(rtc_alarm)); - rtc_alarm.enabled = 0; - rtc_set_alarm(alarm_rtc_dev, &rtc_alarm); - - spin_lock_irqsave(&alarm_slock, flags); - android_lock_suspend_auto_expire(&alarm_rtc_suspend_lock, 2 * HZ); // trigger a wakeup - alarm_start_hrtimer(ANDROID_ALARM_RTC_WAKEUP); - alarm_start_hrtimer(ANDROID_ALARM_ELAPSED_REALTIME_WAKEUP); - err = -EBUSY; - spin_unlock_irqrestore(&alarm_slock, flags); - } - } - else { -err1: - spin_unlock_irqrestore(&alarm_slock, flags); - } - return err; -} - -int alarm_resume(struct platform_device *pdev) -{ - struct rtc_wkalrm alarm; - ANDROID_ALARM_DPRINTF(ANDROID_ALARM_PRINT_FLOW, "alarm_resume(%p)\n", pdev); - if(alarm_enabled & (ANDROID_ALARM_RTC_WAKEUP_MASK | ANDROID_ALARM_ELAPSED_REALTIME_WAKEUP_MASK)) { - memset(&alarm, 0, sizeof(alarm)); - alarm.enabled = 0; - rtc_set_alarm(alarm_rtc_dev, &alarm); - alarm_start_hrtimer(ANDROID_ALARM_RTC_WAKEUP); - alarm_start_hrtimer(ANDROID_ALARM_ELAPSED_REALTIME_WAKEUP); - } - return 0; -} - -static struct rtc_task alarm_rtc_task = { - .func = alarm_triggered_func -}; - -static struct file_operations alarm_fops = { - .owner = THIS_MODULE, - .unlocked_ioctl = alarm_ioctl, - .open = alarm_open, - .release = alarm_release, -}; - -static struct miscdevice alarm_device = { - .minor = MISC_DYNAMIC_MINOR, - .name = "alarm", - .fops = &alarm_fops, -}; - -static int rtc_alarm_add_device(struct device *dev, - struct class_interface *class_intf) -{ - int err; - struct rtc_device *rtc = to_rtc_device(dev); - - mutex_lock(&alarm_setrtc_mutex); - - if(alarm_rtc_dev) { - err = -EBUSY; - goto err1; - } - - err = misc_register(&alarm_device); - if(err) - goto err1; - alarm_platform_dev = platform_device_register_simple("alarm", -1, NULL, 0); - if(IS_ERR(alarm_platform_dev)) { - err = PTR_ERR(alarm_platform_dev); - goto err2; - } - err = rtc_irq_register(rtc, &alarm_rtc_task); - if(err) - goto err3; - alarm_rtc_dev = rtc; - mutex_unlock(&alarm_setrtc_mutex); - - //device_pm_set_parent(&alarm_platform_dev->dev, dev); // currently useless, drivers are suspended in reverse creation order - ANDROID_ALARM_DPRINTF(ANDROID_ALARM_PRINT_INFO, "alarm: parent %p\n", alarm_platform_dev->dev.power.pm_parent); - return 0; - -err3: - platform_device_unregister(alarm_platform_dev); -err2: - misc_deregister(&alarm_device); -err1: - mutex_unlock(&alarm_setrtc_mutex); - return err; -} - -static void rtc_alarm_remove_device(struct device *dev, - struct class_interface *class_intf) -{ - if(dev == &alarm_rtc_dev->dev) { - rtc_irq_unregister(alarm_rtc_dev, &alarm_rtc_task); - platform_device_unregister(alarm_platform_dev); - misc_deregister(&alarm_device); - alarm_rtc_dev = NULL; - } -} - -static struct class_interface rtc_alarm_interface = { - .add_dev = &rtc_alarm_add_device, - .remove_dev = &rtc_alarm_remove_device, -}; - -static struct platform_driver alarm_driver = { - .suspend = alarm_suspend, - .resume = alarm_resume, - .driver = { - .name = "alarm" - } -}; - -static int __init alarm_late_init(void) -{ - unsigned long flags; - struct timespec system_time; - - // this needs to run after the rtc is read at boot - spin_lock_irqsave(&alarm_slock, flags); - // We read the current rtc and system time so we can later calulate - // elasped realtime to be (boot_systemtime + rtc - boot_rtc) == - // (rtc - (boot_rtc - boot_systemtime)) - getnstimeofday(&elapsed_rtc_delta); - ktime_get_ts(&system_time); - elapsed_rtc_delta = timespec_sub(elapsed_rtc_delta, system_time); - spin_unlock_irqrestore(&alarm_slock, flags); - - ANDROID_ALARM_DPRINTF(ANDROID_ALARM_PRINT_INFO, - "alarm_late_init: rtc to elapsed realtime delta %ld.%09ld\n", - elapsed_rtc_delta.tv_sec, elapsed_rtc_delta.tv_nsec); - return 0; -} - -static int __init alarm_init(void) -{ - int err; - int i; - - for(i = 0; i < ANDROID_ALARM_SYSTEMTIME; i++) { - hrtimer_init(&alarm_timer[i], CLOCK_REALTIME, HRTIMER_MODE_ABS); - alarm_timer[i].function = alarm_timer_triggered; - } - hrtimer_init(&alarm_timer[ANDROID_ALARM_SYSTEMTIME], CLOCK_MONOTONIC, HRTIMER_MODE_ABS); - alarm_timer[ANDROID_ALARM_SYSTEMTIME].function = alarm_timer_triggered; - err = platform_driver_register(&alarm_driver); - if(err < 0) - goto err1; - err = android_init_suspend_lock(&alarm_suspend_lock); - if(err < 0) - goto err2; - err = android_init_suspend_lock(&alarm_rtc_suspend_lock); - if(err < 0) - goto err3; - rtc_alarm_interface.class = rtc_class; - err = class_interface_register(&rtc_alarm_interface); - if(err < 0) - goto err4; - - return 0; - -err4: - android_uninit_suspend_lock(&alarm_rtc_suspend_lock); -err3: - android_uninit_suspend_lock(&alarm_suspend_lock); -err2: - platform_driver_unregister(&alarm_driver); -err1: - return err; -} - -static void __exit alarm_exit(void) -{ - class_interface_unregister(&rtc_alarm_interface); - android_uninit_suspend_lock(&alarm_rtc_suspend_lock); - android_uninit_suspend_lock(&alarm_suspend_lock); - platform_driver_unregister(&alarm_driver); -} - -late_initcall(alarm_late_init); -module_init(alarm_init); -module_exit(alarm_exit); - |