Added missing tegra files.HEADmaster

1 files changed, 187 insertions, 0 deletions

diff --git a/kernel/power/earlysuspend.c b/kernel/power/earlysuspend.c
new file mode 100644
index 00000000000..b15f02eba45
--- /dev/null
+++ b/kernel/power/earlysuspend.c
@@ -0,0 +1,187 @@
+/* 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,
+        DEBUG_VERBOSE = 1U << 3,
+};
+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) {
+                        if (debug_mask & DEBUG_VERBOSE)
+                                pr_info("early_suspend: calling %pf\n", pos->suspend);
+                        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) {
+                        if (debug_mask & DEBUG_VERBOSE)
+                                pr_info("late_resume: calling %pf\n", pos->resume);
+
+                        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;
+}