Arve Hjønnevåg | 841cb11 | 2012-02-09 14:24:30 -0800 | [diff] [blame] | 1 | /* drivers/rtc/alarm-dev.c |
| 2 | * |
| 3 | * Copyright (C) 2007-2009 Google, Inc. |
| 4 | * |
| 5 | * This software is licensed under the terms of the GNU General Public |
| 6 | * License version 2, as published by the Free Software Foundation, and |
| 7 | * may be copied, distributed, and modified under those terms. |
| 8 | * |
| 9 | * This program is distributed in the hope that it will be useful, |
| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 12 | * GNU General Public License for more details. |
| 13 | * |
| 14 | */ |
| 15 | |
John Stultz | d47908b | 2012-02-09 14:24:33 -0800 | [diff] [blame] | 16 | #include <linux/time.h> |
Andy Green | bf647ea | 2012-02-09 14:24:32 -0800 | [diff] [blame] | 17 | #include <linux/module.h> |
Arve Hjønnevåg | 841cb11 | 2012-02-09 14:24:30 -0800 | [diff] [blame] | 18 | #include <linux/device.h> |
| 19 | #include <linux/miscdevice.h> |
| 20 | #include <linux/fs.h> |
| 21 | #include <linux/platform_device.h> |
| 22 | #include <linux/sched.h> |
| 23 | #include <linux/spinlock.h> |
Arve Hjønnevåg | 841cb11 | 2012-02-09 14:24:30 -0800 | [diff] [blame] | 24 | #include <linux/uaccess.h> |
John Stultz | b8793260 | 2012-04-20 12:31:46 -0700 | [diff] [blame] | 25 | #include <linux/alarmtimer.h> |
Arve Hjønnevåg | 841cb11 | 2012-02-09 14:24:30 -0800 | [diff] [blame] | 26 | #include "android_alarm.h" |
| 27 | |
| 28 | #define ANDROID_ALARM_PRINT_INFO (1U << 0) |
| 29 | #define ANDROID_ALARM_PRINT_IO (1U << 1) |
| 30 | #define ANDROID_ALARM_PRINT_INT (1U << 2) |
| 31 | |
| 32 | static int debug_mask = ANDROID_ALARM_PRINT_INFO; |
| 33 | module_param_named(debug_mask, debug_mask, int, S_IRUGO | S_IWUSR | S_IWGRP); |
| 34 | |
Joe Perches | 8a7245e | 2012-05-20 14:06:36 -0700 | [diff] [blame] | 35 | #define alarm_dbg(debug_level_mask, fmt, ...) \ |
| 36 | do { \ |
| 37 | if (debug_mask & ANDROID_ALARM_PRINT_##debug_level_mask) \ |
| 38 | pr_info(fmt, ##__VA_ARGS__); \ |
| 39 | } while (0) |
Arve Hjønnevåg | 841cb11 | 2012-02-09 14:24:30 -0800 | [diff] [blame] | 40 | |
| 41 | #define ANDROID_ALARM_WAKEUP_MASK ( \ |
| 42 | ANDROID_ALARM_RTC_WAKEUP_MASK | \ |
| 43 | ANDROID_ALARM_ELAPSED_REALTIME_WAKEUP_MASK) |
| 44 | |
Arve Hjønnevåg | 841cb11 | 2012-02-09 14:24:30 -0800 | [diff] [blame] | 45 | static int alarm_opened; |
| 46 | static DEFINE_SPINLOCK(alarm_slock); |
John Stultz | a180c0d | 2012-04-24 10:57:16 -0700 | [diff] [blame] | 47 | static struct wakeup_source alarm_wake_lock; |
Arve Hjønnevåg | 841cb11 | 2012-02-09 14:24:30 -0800 | [diff] [blame] | 48 | static DECLARE_WAIT_QUEUE_HEAD(alarm_wait_queue); |
| 49 | static uint32_t alarm_pending; |
| 50 | static uint32_t alarm_enabled; |
| 51 | static uint32_t wait_pending; |
| 52 | |
John Stultz | b8793260 | 2012-04-20 12:31:46 -0700 | [diff] [blame] | 53 | struct devalarm { |
| 54 | union { |
| 55 | struct hrtimer hrt; |
| 56 | struct alarm alrm; |
| 57 | } u; |
| 58 | enum android_alarm_type type; |
| 59 | }; |
| 60 | |
| 61 | static struct devalarm alarms[ANDROID_ALARM_TYPE_COUNT]; |
| 62 | |
Cruz Julian Bishop | b59f105 | 2013-09-03 22:05:09 +1000 | [diff] [blame] | 63 | /** |
| 64 | * is_wakeup() - Checks to see if this alarm can wake the device |
| 65 | * @type: The type of alarm being checked |
| 66 | * |
| 67 | * Return: 1 if this is a wakeup alarm, otherwise 0 |
| 68 | */ |
John Stultz | b8793260 | 2012-04-20 12:31:46 -0700 | [diff] [blame] | 69 | static int is_wakeup(enum android_alarm_type type) |
| 70 | { |
SeongJae Park | 6eaf842 | 2013-11-14 21:15:10 +0900 | [diff] [blame] | 71 | return type == ANDROID_ALARM_RTC_WAKEUP || |
| 72 | type == ANDROID_ALARM_ELAPSED_REALTIME_WAKEUP; |
John Stultz | b8793260 | 2012-04-20 12:31:46 -0700 | [diff] [blame] | 73 | } |
| 74 | |
John Stultz | b8793260 | 2012-04-20 12:31:46 -0700 | [diff] [blame] | 75 | static void devalarm_start(struct devalarm *alrm, ktime_t exp) |
| 76 | { |
| 77 | if (is_wakeup(alrm->type)) |
| 78 | alarm_start(&alrm->u.alrm, exp); |
| 79 | else |
| 80 | hrtimer_start(&alrm->u.hrt, exp, HRTIMER_MODE_ABS); |
| 81 | } |
| 82 | |
John Stultz | b8793260 | 2012-04-20 12:31:46 -0700 | [diff] [blame] | 83 | static int devalarm_try_to_cancel(struct devalarm *alrm) |
| 84 | { |
John Stultz | b8793260 | 2012-04-20 12:31:46 -0700 | [diff] [blame] | 85 | if (is_wakeup(alrm->type)) |
Dae S. Kim | 147cd16 | 2012-08-29 17:08:33 +0200 | [diff] [blame] | 86 | return alarm_try_to_cancel(&alrm->u.alrm); |
| 87 | return hrtimer_try_to_cancel(&alrm->u.hrt); |
John Stultz | b8793260 | 2012-04-20 12:31:46 -0700 | [diff] [blame] | 88 | } |
| 89 | |
| 90 | static void devalarm_cancel(struct devalarm *alrm) |
| 91 | { |
| 92 | if (is_wakeup(alrm->type)) |
| 93 | alarm_cancel(&alrm->u.alrm); |
| 94 | else |
| 95 | hrtimer_cancel(&alrm->u.hrt); |
| 96 | } |
| 97 | |
John Stultz | cec8bb7 | 2013-01-11 15:46:23 -0800 | [diff] [blame] | 98 | static void alarm_clear(enum android_alarm_type alarm_type) |
| 99 | { |
| 100 | uint32_t alarm_type_mask = 1U << alarm_type; |
| 101 | unsigned long flags; |
Arve Hjønnevåg | 841cb11 | 2012-02-09 14:24:30 -0800 | [diff] [blame] | 102 | |
John Stultz | cec8bb7 | 2013-01-11 15:46:23 -0800 | [diff] [blame] | 103 | spin_lock_irqsave(&alarm_slock, flags); |
| 104 | alarm_dbg(IO, "alarm %d clear\n", alarm_type); |
| 105 | devalarm_try_to_cancel(&alarms[alarm_type]); |
| 106 | if (alarm_pending) { |
| 107 | alarm_pending &= ~alarm_type_mask; |
| 108 | if (!alarm_pending && !wait_pending) |
| 109 | __pm_relax(&alarm_wake_lock); |
| 110 | } |
| 111 | alarm_enabled &= ~alarm_type_mask; |
| 112 | spin_unlock_irqrestore(&alarm_slock, flags); |
John Stultz | cec8bb7 | 2013-01-11 15:46:23 -0800 | [diff] [blame] | 113 | } |
| 114 | |
| 115 | static void alarm_set(enum android_alarm_type alarm_type, |
| 116 | struct timespec *ts) |
| 117 | { |
| 118 | uint32_t alarm_type_mask = 1U << alarm_type; |
| 119 | unsigned long flags; |
| 120 | |
| 121 | spin_lock_irqsave(&alarm_slock, flags); |
| 122 | alarm_dbg(IO, "alarm %d set %ld.%09ld\n", |
| 123 | alarm_type, ts->tv_sec, ts->tv_nsec); |
| 124 | alarm_enabled |= alarm_type_mask; |
| 125 | devalarm_start(&alarms[alarm_type], timespec_to_ktime(*ts)); |
| 126 | spin_unlock_irqrestore(&alarm_slock, flags); |
| 127 | } |
| 128 | |
| 129 | static int alarm_wait(void) |
| 130 | { |
| 131 | unsigned long flags; |
| 132 | int rv = 0; |
| 133 | |
| 134 | spin_lock_irqsave(&alarm_slock, flags); |
| 135 | alarm_dbg(IO, "alarm wait\n"); |
| 136 | if (!alarm_pending && wait_pending) { |
| 137 | __pm_relax(&alarm_wake_lock); |
| 138 | wait_pending = 0; |
| 139 | } |
| 140 | spin_unlock_irqrestore(&alarm_slock, flags); |
| 141 | |
| 142 | rv = wait_event_interruptible(alarm_wait_queue, alarm_pending); |
| 143 | if (rv) |
| 144 | return rv; |
| 145 | |
| 146 | spin_lock_irqsave(&alarm_slock, flags); |
| 147 | rv = alarm_pending; |
| 148 | wait_pending = 1; |
| 149 | alarm_pending = 0; |
| 150 | spin_unlock_irqrestore(&alarm_slock, flags); |
| 151 | |
| 152 | return rv; |
| 153 | } |
| 154 | |
| 155 | static int alarm_set_rtc(struct timespec *ts) |
| 156 | { |
| 157 | struct rtc_time new_rtc_tm; |
| 158 | struct rtc_device *rtc_dev; |
| 159 | unsigned long flags; |
| 160 | int rv = 0; |
| 161 | |
| 162 | rtc_time_to_tm(ts->tv_sec, &new_rtc_tm); |
| 163 | rtc_dev = alarmtimer_get_rtcdev(); |
| 164 | rv = do_settimeofday(ts); |
| 165 | if (rv < 0) |
| 166 | return rv; |
| 167 | if (rtc_dev) |
| 168 | rv = rtc_set_time(rtc_dev, &new_rtc_tm); |
| 169 | |
| 170 | spin_lock_irqsave(&alarm_slock, flags); |
| 171 | alarm_pending |= ANDROID_ALARM_TIME_CHANGE_MASK; |
| 172 | wake_up(&alarm_wait_queue); |
| 173 | spin_unlock_irqrestore(&alarm_slock, flags); |
| 174 | |
| 175 | return rv; |
| 176 | } |
| 177 | |
| 178 | static int alarm_get_time(enum android_alarm_type alarm_type, |
| 179 | struct timespec *ts) |
| 180 | { |
| 181 | int rv = 0; |
| 182 | |
| 183 | switch (alarm_type) { |
| 184 | case ANDROID_ALARM_RTC_WAKEUP: |
| 185 | case ANDROID_ALARM_RTC: |
| 186 | getnstimeofday(ts); |
| 187 | break; |
| 188 | case ANDROID_ALARM_ELAPSED_REALTIME_WAKEUP: |
| 189 | case ANDROID_ALARM_ELAPSED_REALTIME: |
| 190 | get_monotonic_boottime(ts); |
| 191 | break; |
| 192 | case ANDROID_ALARM_SYSTEMTIME: |
| 193 | ktime_get_ts(ts); |
| 194 | break; |
| 195 | default: |
| 196 | rv = -EINVAL; |
| 197 | } |
| 198 | return rv; |
| 199 | } |
| 200 | |
| 201 | static long alarm_do_ioctl(struct file *file, unsigned int cmd, |
| 202 | struct timespec *ts) |
Arve Hjønnevåg | 841cb11 | 2012-02-09 14:24:30 -0800 | [diff] [blame] | 203 | { |
| 204 | int rv = 0; |
| 205 | unsigned long flags; |
Arve Hjønnevåg | 841cb11 | 2012-02-09 14:24:30 -0800 | [diff] [blame] | 206 | enum android_alarm_type alarm_type = ANDROID_ALARM_IOCTL_TO_TYPE(cmd); |
Arve Hjønnevåg | 841cb11 | 2012-02-09 14:24:30 -0800 | [diff] [blame] | 207 | |
| 208 | if (alarm_type >= ANDROID_ALARM_TYPE_COUNT) |
| 209 | return -EINVAL; |
| 210 | |
| 211 | if (ANDROID_ALARM_BASE_CMD(cmd) != ANDROID_ALARM_GET_TIME(0)) { |
| 212 | if ((file->f_flags & O_ACCMODE) == O_RDONLY) |
| 213 | return -EPERM; |
| 214 | if (file->private_data == NULL && |
| 215 | cmd != ANDROID_ALARM_SET_RTC) { |
| 216 | spin_lock_irqsave(&alarm_slock, flags); |
| 217 | if (alarm_opened) { |
| 218 | spin_unlock_irqrestore(&alarm_slock, flags); |
| 219 | return -EBUSY; |
| 220 | } |
| 221 | alarm_opened = 1; |
| 222 | file->private_data = (void *)1; |
| 223 | spin_unlock_irqrestore(&alarm_slock, flags); |
| 224 | } |
| 225 | } |
| 226 | |
| 227 | switch (ANDROID_ALARM_BASE_CMD(cmd)) { |
| 228 | case ANDROID_ALARM_CLEAR(0): |
John Stultz | cec8bb7 | 2013-01-11 15:46:23 -0800 | [diff] [blame] | 229 | alarm_clear(alarm_type); |
Arve Hjønnevåg | 841cb11 | 2012-02-09 14:24:30 -0800 | [diff] [blame] | 230 | break; |
Arve Hjønnevåg | 841cb11 | 2012-02-09 14:24:30 -0800 | [diff] [blame] | 231 | case ANDROID_ALARM_SET(0): |
John Stultz | cec8bb7 | 2013-01-11 15:46:23 -0800 | [diff] [blame] | 232 | alarm_set(alarm_type, ts); |
| 233 | break; |
| 234 | case ANDROID_ALARM_SET_AND_WAIT(0): |
| 235 | alarm_set(alarm_type, ts); |
Arve Hjønnevåg | 841cb11 | 2012-02-09 14:24:30 -0800 | [diff] [blame] | 236 | /* fall though */ |
| 237 | case ANDROID_ALARM_WAIT: |
John Stultz | cec8bb7 | 2013-01-11 15:46:23 -0800 | [diff] [blame] | 238 | rv = alarm_wait(); |
Arve Hjønnevåg | 841cb11 | 2012-02-09 14:24:30 -0800 | [diff] [blame] | 239 | break; |
| 240 | case ANDROID_ALARM_SET_RTC: |
John Stultz | cec8bb7 | 2013-01-11 15:46:23 -0800 | [diff] [blame] | 241 | rv = alarm_set_rtc(ts); |
Arve Hjønnevåg | 841cb11 | 2012-02-09 14:24:30 -0800 | [diff] [blame] | 242 | break; |
| 243 | case ANDROID_ALARM_GET_TIME(0): |
John Stultz | cec8bb7 | 2013-01-11 15:46:23 -0800 | [diff] [blame] | 244 | rv = alarm_get_time(alarm_type, ts); |
Arve Hjønnevåg | 841cb11 | 2012-02-09 14:24:30 -0800 | [diff] [blame] | 245 | break; |
| 246 | |
| 247 | default: |
| 248 | rv = -EINVAL; |
Arve Hjønnevåg | 841cb11 | 2012-02-09 14:24:30 -0800 | [diff] [blame] | 249 | } |
John Stultz | cec8bb7 | 2013-01-11 15:46:23 -0800 | [diff] [blame] | 250 | return rv; |
| 251 | } |
| 252 | |
| 253 | static long alarm_ioctl(struct file *file, unsigned int cmd, unsigned long arg) |
| 254 | { |
| 255 | |
| 256 | struct timespec ts; |
| 257 | int rv; |
| 258 | |
| 259 | switch (ANDROID_ALARM_BASE_CMD(cmd)) { |
| 260 | case ANDROID_ALARM_SET_AND_WAIT(0): |
| 261 | case ANDROID_ALARM_SET(0): |
| 262 | case ANDROID_ALARM_SET_RTC: |
| 263 | if (copy_from_user(&ts, (void __user *)arg, sizeof(ts))) |
| 264 | return -EFAULT; |
| 265 | break; |
| 266 | } |
| 267 | |
| 268 | rv = alarm_do_ioctl(file, cmd, &ts); |
Dan Carpenter | e919b86 | 2013-06-03 02:02:31 -0700 | [diff] [blame] | 269 | if (rv) |
| 270 | return rv; |
John Stultz | cec8bb7 | 2013-01-11 15:46:23 -0800 | [diff] [blame] | 271 | |
| 272 | switch (ANDROID_ALARM_BASE_CMD(cmd)) { |
| 273 | case ANDROID_ALARM_GET_TIME(0): |
| 274 | if (copy_to_user((void __user *)arg, &ts, sizeof(ts))) |
| 275 | return -EFAULT; |
| 276 | break; |
| 277 | } |
| 278 | |
Dan Carpenter | e919b86 | 2013-06-03 02:02:31 -0700 | [diff] [blame] | 279 | return 0; |
Arve Hjønnevåg | 841cb11 | 2012-02-09 14:24:30 -0800 | [diff] [blame] | 280 | } |
SeongJae Park | 5230a5f | 2013-11-14 21:15:12 +0900 | [diff] [blame] | 281 | |
John Stultz | 532572b | 2013-01-11 15:46:24 -0800 | [diff] [blame] | 282 | #ifdef CONFIG_COMPAT |
| 283 | static long alarm_compat_ioctl(struct file *file, unsigned int cmd, |
| 284 | unsigned long arg) |
| 285 | { |
| 286 | |
| 287 | struct timespec ts; |
| 288 | int rv; |
| 289 | |
| 290 | switch (ANDROID_ALARM_BASE_CMD(cmd)) { |
| 291 | case ANDROID_ALARM_SET_AND_WAIT_COMPAT(0): |
| 292 | case ANDROID_ALARM_SET_COMPAT(0): |
| 293 | case ANDROID_ALARM_SET_RTC_COMPAT: |
| 294 | if (compat_get_timespec(&ts, (void __user *)arg)) |
| 295 | return -EFAULT; |
| 296 | /* fall through */ |
| 297 | case ANDROID_ALARM_GET_TIME_COMPAT(0): |
| 298 | cmd = ANDROID_ALARM_COMPAT_TO_NORM(cmd); |
| 299 | break; |
| 300 | } |
| 301 | |
| 302 | rv = alarm_do_ioctl(file, cmd, &ts); |
Dan Carpenter | 60bba38 | 2013-06-04 16:13:25 +0300 | [diff] [blame] | 303 | if (rv) |
| 304 | return rv; |
John Stultz | 532572b | 2013-01-11 15:46:24 -0800 | [diff] [blame] | 305 | |
| 306 | switch (ANDROID_ALARM_BASE_CMD(cmd)) { |
| 307 | case ANDROID_ALARM_GET_TIME(0): /* NOTE: we modified cmd above */ |
| 308 | if (compat_put_timespec(&ts, (void __user *)arg)) |
| 309 | return -EFAULT; |
| 310 | break; |
| 311 | } |
| 312 | |
Dan Carpenter | 60bba38 | 2013-06-04 16:13:25 +0300 | [diff] [blame] | 313 | return 0; |
John Stultz | 532572b | 2013-01-11 15:46:24 -0800 | [diff] [blame] | 314 | } |
| 315 | #endif |
Arve Hjønnevåg | 841cb11 | 2012-02-09 14:24:30 -0800 | [diff] [blame] | 316 | |
| 317 | static int alarm_open(struct inode *inode, struct file *file) |
| 318 | { |
| 319 | file->private_data = NULL; |
| 320 | return 0; |
| 321 | } |
| 322 | |
| 323 | static int alarm_release(struct inode *inode, struct file *file) |
| 324 | { |
| 325 | int i; |
| 326 | unsigned long flags; |
| 327 | |
| 328 | spin_lock_irqsave(&alarm_slock, flags); |
Sachin Kamat | 592314e | 2012-06-05 15:05:13 +0530 | [diff] [blame] | 329 | if (file->private_data) { |
Arve Hjønnevåg | 841cb11 | 2012-02-09 14:24:30 -0800 | [diff] [blame] | 330 | for (i = 0; i < ANDROID_ALARM_TYPE_COUNT; i++) { |
| 331 | uint32_t alarm_type_mask = 1U << i; |
Seunghun Lee | 10f6286 | 2014-05-01 01:30:23 +0900 | [diff] [blame] | 332 | |
Arve Hjønnevåg | 841cb11 | 2012-02-09 14:24:30 -0800 | [diff] [blame] | 333 | if (alarm_enabled & alarm_type_mask) { |
Joe Perches | 8a7245e | 2012-05-20 14:06:36 -0700 | [diff] [blame] | 334 | alarm_dbg(INFO, |
| 335 | "%s: clear alarm, pending %d\n", |
| 336 | __func__, |
| 337 | !!(alarm_pending & alarm_type_mask)); |
Arve Hjønnevåg | 841cb11 | 2012-02-09 14:24:30 -0800 | [diff] [blame] | 338 | alarm_enabled &= ~alarm_type_mask; |
| 339 | } |
| 340 | spin_unlock_irqrestore(&alarm_slock, flags); |
John Stultz | b8793260 | 2012-04-20 12:31:46 -0700 | [diff] [blame] | 341 | devalarm_cancel(&alarms[i]); |
Arve Hjønnevåg | 841cb11 | 2012-02-09 14:24:30 -0800 | [diff] [blame] | 342 | spin_lock_irqsave(&alarm_slock, flags); |
| 343 | } |
| 344 | if (alarm_pending | wait_pending) { |
| 345 | if (alarm_pending) |
Joe Perches | 8a7245e | 2012-05-20 14:06:36 -0700 | [diff] [blame] | 346 | alarm_dbg(INFO, "%s: clear pending alarms %x\n", |
| 347 | __func__, alarm_pending); |
John Stultz | a180c0d | 2012-04-24 10:57:16 -0700 | [diff] [blame] | 348 | __pm_relax(&alarm_wake_lock); |
Arve Hjønnevåg | 841cb11 | 2012-02-09 14:24:30 -0800 | [diff] [blame] | 349 | wait_pending = 0; |
| 350 | alarm_pending = 0; |
| 351 | } |
| 352 | alarm_opened = 0; |
| 353 | } |
| 354 | spin_unlock_irqrestore(&alarm_slock, flags); |
| 355 | return 0; |
| 356 | } |
| 357 | |
John Stultz | b8793260 | 2012-04-20 12:31:46 -0700 | [diff] [blame] | 358 | static void devalarm_triggered(struct devalarm *alarm) |
Arve Hjønnevåg | 841cb11 | 2012-02-09 14:24:30 -0800 | [diff] [blame] | 359 | { |
| 360 | unsigned long flags; |
| 361 | uint32_t alarm_type_mask = 1U << alarm->type; |
| 362 | |
Joe Perches | 8a7245e | 2012-05-20 14:06:36 -0700 | [diff] [blame] | 363 | alarm_dbg(INT, "%s: type %d\n", __func__, alarm->type); |
Arve Hjønnevåg | 841cb11 | 2012-02-09 14:24:30 -0800 | [diff] [blame] | 364 | spin_lock_irqsave(&alarm_slock, flags); |
| 365 | if (alarm_enabled & alarm_type_mask) { |
John Stultz | a180c0d | 2012-04-24 10:57:16 -0700 | [diff] [blame] | 366 | __pm_wakeup_event(&alarm_wake_lock, 5000); /* 5secs */ |
Arve Hjønnevåg | 841cb11 | 2012-02-09 14:24:30 -0800 | [diff] [blame] | 367 | alarm_enabled &= ~alarm_type_mask; |
| 368 | alarm_pending |= alarm_type_mask; |
| 369 | wake_up(&alarm_wait_queue); |
| 370 | } |
| 371 | spin_unlock_irqrestore(&alarm_slock, flags); |
| 372 | } |
| 373 | |
John Stultz | b8793260 | 2012-04-20 12:31:46 -0700 | [diff] [blame] | 374 | static enum hrtimer_restart devalarm_hrthandler(struct hrtimer *hrt) |
| 375 | { |
| 376 | struct devalarm *devalrm = container_of(hrt, struct devalarm, u.hrt); |
| 377 | |
| 378 | devalarm_triggered(devalrm); |
| 379 | return HRTIMER_NORESTART; |
| 380 | } |
| 381 | |
| 382 | static enum alarmtimer_restart devalarm_alarmhandler(struct alarm *alrm, |
| 383 | ktime_t now) |
| 384 | { |
| 385 | struct devalarm *devalrm = container_of(alrm, struct devalarm, u.alrm); |
| 386 | |
| 387 | devalarm_triggered(devalrm); |
| 388 | return ALARMTIMER_NORESTART; |
| 389 | } |
| 390 | |
| 391 | |
Arve Hjønnevåg | 841cb11 | 2012-02-09 14:24:30 -0800 | [diff] [blame] | 392 | static const struct file_operations alarm_fops = { |
| 393 | .owner = THIS_MODULE, |
| 394 | .unlocked_ioctl = alarm_ioctl, |
| 395 | .open = alarm_open, |
| 396 | .release = alarm_release, |
John Stultz | 532572b | 2013-01-11 15:46:24 -0800 | [diff] [blame] | 397 | #ifdef CONFIG_COMPAT |
| 398 | .compat_ioctl = alarm_compat_ioctl, |
| 399 | #endif |
Arve Hjønnevåg | 841cb11 | 2012-02-09 14:24:30 -0800 | [diff] [blame] | 400 | }; |
| 401 | |
| 402 | static struct miscdevice alarm_device = { |
| 403 | .minor = MISC_DYNAMIC_MINOR, |
| 404 | .name = "alarm", |
| 405 | .fops = &alarm_fops, |
| 406 | }; |
| 407 | |
| 408 | static int __init alarm_dev_init(void) |
| 409 | { |
| 410 | int err; |
| 411 | int i; |
| 412 | |
| 413 | err = misc_register(&alarm_device); |
| 414 | if (err) |
| 415 | return err; |
| 416 | |
John Stultz | b8793260 | 2012-04-20 12:31:46 -0700 | [diff] [blame] | 417 | alarm_init(&alarms[ANDROID_ALARM_RTC_WAKEUP].u.alrm, |
| 418 | ALARM_REALTIME, devalarm_alarmhandler); |
| 419 | hrtimer_init(&alarms[ANDROID_ALARM_RTC].u.hrt, |
| 420 | CLOCK_REALTIME, HRTIMER_MODE_ABS); |
| 421 | alarm_init(&alarms[ANDROID_ALARM_ELAPSED_REALTIME_WAKEUP].u.alrm, |
| 422 | ALARM_BOOTTIME, devalarm_alarmhandler); |
| 423 | hrtimer_init(&alarms[ANDROID_ALARM_ELAPSED_REALTIME].u.hrt, |
| 424 | CLOCK_BOOTTIME, HRTIMER_MODE_ABS); |
| 425 | hrtimer_init(&alarms[ANDROID_ALARM_SYSTEMTIME].u.hrt, |
| 426 | CLOCK_MONOTONIC, HRTIMER_MODE_ABS); |
| 427 | |
| 428 | for (i = 0; i < ANDROID_ALARM_TYPE_COUNT; i++) { |
| 429 | alarms[i].type = i; |
| 430 | if (!is_wakeup(i)) |
| 431 | alarms[i].u.hrt.function = devalarm_hrthandler; |
| 432 | } |
| 433 | |
John Stultz | a180c0d | 2012-04-24 10:57:16 -0700 | [diff] [blame] | 434 | wakeup_source_init(&alarm_wake_lock, "alarm"); |
Arve Hjønnevåg | 841cb11 | 2012-02-09 14:24:30 -0800 | [diff] [blame] | 435 | return 0; |
| 436 | } |
| 437 | |
| 438 | static void __exit alarm_dev_exit(void) |
| 439 | { |
| 440 | misc_deregister(&alarm_device); |
John Stultz | a180c0d | 2012-04-24 10:57:16 -0700 | [diff] [blame] | 441 | wakeup_source_trash(&alarm_wake_lock); |
Arve Hjønnevåg | 841cb11 | 2012-02-09 14:24:30 -0800 | [diff] [blame] | 442 | } |
| 443 | |
| 444 | module_init(alarm_dev_init); |
| 445 | module_exit(alarm_dev_exit); |
Pramod Gurav | 2a838c6 | 2014-06-20 14:13:59 +0530 | [diff] [blame] | 446 | MODULE_LICENSE("GPL"); |