+++ /dev/null
-From 2d4a25785ad1aa51bad967543e1ab20e9ed4a046 Mon Sep 17 00:00:00 2001
-From: =?utf-8?q?Arve=20Hj=C3=B8nnev=C3=A5g?= <arve@android.com>
-Date: Tue, 7 Oct 2008 20:48:01 -0700
-Subject: [PATCH 067/134] PM: Implement early suspend api
-
----
- kernel/power/Kconfig | 12 +++
- kernel/power/Makefile | 1 +
- kernel/power/earlysuspend.c | 178 +++++++++++++++++++++++++++++++++++++++++++
- kernel/power/power.h | 6 ++
- 4 files changed, 197 insertions(+), 0 deletions(-)
- create mode 100644 kernel/power/earlysuspend.c
-
---- a/kernel/power/Kconfig
-+++ b/kernel/power/Kconfig
-@@ -119,6 +119,9 @@ config SUSPEND_FREEZER
- config HAS_WAKELOCK
- bool
-
-+config HAS_EARLYSUSPEND
-+ bool
-+
- config WAKELOCK
- bool "Wake lock"
- depends on PM && RTC_CLASS
-@@ -135,6 +138,15 @@ config WAKELOCK_STAT
- ---help---
- Report wake lock stats in /proc/wakelocks
-
-+config EARLYSUSPEND
-+ bool "Early suspend"
-+ depends on WAKELOCK
-+ default y
-+ select HAS_EARLYSUSPEND
-+ ---help---
-+ Call early suspend handlers when the user requested sleep state
-+ changes.
-+
- config HIBERNATION
- bool "Hibernation (aka 'suspend to disk')"
- depends on PM && SWAP && ARCH_HIBERNATION_POSSIBLE
---- a/kernel/power/Makefile
-+++ b/kernel/power/Makefile
-@@ -7,6 +7,7 @@ obj-$(CONFIG_PM) += main.o
- obj-$(CONFIG_PM_SLEEP) += console.o
- obj-$(CONFIG_FREEZER) += process.o
- obj-$(CONFIG_WAKELOCK) += wakelock.o
-+obj-$(CONFIG_EARLYSUSPEND) += earlysuspend.o
- obj-$(CONFIG_HIBERNATION) += swsusp.o disk.o snapshot.o swap.o user.o
-
- obj-$(CONFIG_MAGIC_SYSRQ) += poweroff.o
---- /dev/null
-+++ b/kernel/power/earlysuspend.c
-@@ -0,0 +1,178 @@
-+/* kernel/power/earlysuspend.c
-+ *
-+ * Copyright (C) 2005-2008 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 <linux/earlysuspend.h>
-+#include <linux/module.h>
-+#include <linux/mutex.h>
-+#include <linux/rtc.h>
-+#include <linux/syscalls.h> /* sys_sync */
-+#include <linux/wakelock.h>
-+#include <linux/workqueue.h>
-+
-+#include "power.h"
-+
-+enum {
-+ DEBUG_USER_STATE = 1U << 0,
-+ DEBUG_SUSPEND = 1U << 2,
-+};
-+static int debug_mask = DEBUG_USER_STATE;
-+module_param_named(debug_mask, debug_mask, int, S_IRUGO | S_IWUSR | S_IWGRP);
-+
-+static DEFINE_MUTEX(early_suspend_lock);
-+static LIST_HEAD(early_suspend_handlers);
-+static void early_suspend(struct work_struct *work);
-+static void late_resume(struct work_struct *work);
-+static DECLARE_WORK(early_suspend_work, early_suspend);
-+static DECLARE_WORK(late_resume_work, late_resume);
-+static DEFINE_SPINLOCK(state_lock);
-+enum {
-+ SUSPEND_REQUESTED = 0x1,
-+ SUSPENDED = 0x2,
-+ SUSPEND_REQUESTED_AND_SUSPENDED = SUSPEND_REQUESTED | SUSPENDED,
-+};
-+static int state;
-+
-+void register_early_suspend(struct early_suspend *handler)
-+{
-+ struct list_head *pos;
-+
-+ mutex_lock(&early_suspend_lock);
-+ list_for_each(pos, &early_suspend_handlers) {
-+ struct early_suspend *e;
-+ e = list_entry(pos, struct early_suspend, link);
-+ if (e->level > handler->level)
-+ break;
-+ }
-+ list_add_tail(&handler->link, pos);
-+ if ((state & SUSPENDED) && handler->suspend)
-+ handler->suspend(handler);
-+ mutex_unlock(&early_suspend_lock);
-+}
-+EXPORT_SYMBOL(register_early_suspend);
-+
-+void unregister_early_suspend(struct early_suspend *handler)
-+{
-+ mutex_lock(&early_suspend_lock);
-+ list_del(&handler->link);
-+ mutex_unlock(&early_suspend_lock);
-+}
-+EXPORT_SYMBOL(unregister_early_suspend);
-+
-+static void early_suspend(struct work_struct *work)
-+{
-+ struct early_suspend *pos;
-+ unsigned long irqflags;
-+ int abort = 0;
-+
-+ mutex_lock(&early_suspend_lock);
-+ spin_lock_irqsave(&state_lock, irqflags);
-+ if (state == SUSPEND_REQUESTED)
-+ state |= SUSPENDED;
-+ else
-+ abort = 1;
-+ spin_unlock_irqrestore(&state_lock, irqflags);
-+
-+ if (abort) {
-+ if (debug_mask & DEBUG_SUSPEND)
-+ pr_info("early_suspend: abort, state %d\n", state);
-+ mutex_unlock(&early_suspend_lock);
-+ goto abort;
-+ }
-+
-+ if (debug_mask & DEBUG_SUSPEND)
-+ pr_info("early_suspend: call handlers\n");
-+ list_for_each_entry(pos, &early_suspend_handlers, link) {
-+ if (pos->suspend != NULL)
-+ pos->suspend(pos);
-+ }
-+ mutex_unlock(&early_suspend_lock);
-+
-+ if (debug_mask & DEBUG_SUSPEND)
-+ pr_info("early_suspend: sync\n");
-+
-+ sys_sync();
-+abort:
-+ spin_lock_irqsave(&state_lock, irqflags);
-+ if (state == SUSPEND_REQUESTED_AND_SUSPENDED)
-+ wake_unlock(&main_wake_lock);
-+ spin_unlock_irqrestore(&state_lock, irqflags);
-+}
-+
-+static void late_resume(struct work_struct *work)
-+{
-+ struct early_suspend *pos;
-+ unsigned long irqflags;
-+ int abort = 0;
-+
-+ mutex_lock(&early_suspend_lock);
-+ spin_lock_irqsave(&state_lock, irqflags);
-+ if (state == SUSPENDED)
-+ state &= ~SUSPENDED;
-+ else
-+ abort = 1;
-+ spin_unlock_irqrestore(&state_lock, irqflags);
-+
-+ if (abort) {
-+ if (debug_mask & DEBUG_SUSPEND)
-+ pr_info("late_resume: abort, state %d\n", state);
-+ goto abort;
-+ }
-+ if (debug_mask & DEBUG_SUSPEND)
-+ pr_info("late_resume: call handlers\n");
-+ list_for_each_entry_reverse(pos, &early_suspend_handlers, link)
-+ if (pos->resume != NULL)
-+ pos->resume(pos);
-+ if (debug_mask & DEBUG_SUSPEND)
-+ pr_info("late_resume: done\n");
-+abort:
-+ mutex_unlock(&early_suspend_lock);
-+}
-+
-+void request_suspend_state(suspend_state_t new_state)
-+{
-+ unsigned long irqflags;
-+ int old_sleep;
-+
-+ spin_lock_irqsave(&state_lock, irqflags);
-+ old_sleep = state & SUSPEND_REQUESTED;
-+ if (debug_mask & DEBUG_USER_STATE) {
-+ struct timespec ts;
-+ struct rtc_time tm;
-+ getnstimeofday(&ts);
-+ rtc_time_to_tm(ts.tv_sec, &tm);
-+ pr_info("request_suspend_state: %s (%d->%d) at %lld "
-+ "(%d-%02d-%02d %02d:%02d:%02d.%09lu UTC)\n",
-+ new_state != PM_SUSPEND_ON ? "sleep" : "wakeup",
-+ requested_suspend_state, new_state,
-+ ktime_to_ns(ktime_get()),
-+ tm.tm_year + 1900, tm.tm_mon + 1, tm.tm_mday,
-+ tm.tm_hour, tm.tm_min, tm.tm_sec, ts.tv_nsec);
-+ }
-+ if (!old_sleep && new_state != PM_SUSPEND_ON) {
-+ state |= SUSPEND_REQUESTED;
-+ queue_work(suspend_work_queue, &early_suspend_work);
-+ } else if (old_sleep && new_state == PM_SUSPEND_ON) {
-+ state &= ~SUSPEND_REQUESTED;
-+ wake_lock(&main_wake_lock);
-+ queue_work(suspend_work_queue, &late_resume_work);
-+ }
-+ requested_suspend_state = new_state;
-+ spin_unlock_irqrestore(&state_lock, irqflags);
-+}
-+
-+suspend_state_t get_suspend_state(void)
-+{
-+ return requested_suspend_state;
-+}
---- a/kernel/power/power.h
-+++ b/kernel/power/power.h
-@@ -230,3 +230,9 @@ extern struct workqueue_struct *suspend_
- extern struct wake_lock main_wake_lock;
- extern suspend_state_t requested_suspend_state;
- #endif
-+
-+#ifdef CONFIG_EARLYSUSPEND
-+/* kernel/power/earlysuspend.c */
-+void request_suspend_state(suspend_state_t state);
-+suspend_state_t get_suspend_state(void);
-+#endif
projects / openwrt / svn-archive / archive.git / blobdiff