[Suspend2][ 0/4] Power off routines.

[Suspend2][ 0/4] Power off routines.

[Nigel Cunningham]

Routines used in entering a sleep state after writing the image. We may
enter ACPI S3, S4 or S5 states, or use the non-ACPI powerdown path.

[Suspend2][ 1/4] [Suspend2] Power_off.c header.

[Nigel Cunningham]

Add kernel/power/power_off.c header.

Signed-off-by: Nigel Cunningham <nigel@suspend2.net>

 kernel/power/power_off.c |   26 ++++++++++++++++++++++++++
 1 files changed, 26 insertions(+), 0 deletions(-)

diff --git a/kernel/power/power_off.c b/kernel/power/power_off.c
new file mode 100644
index 0000000..8f9f425
--- /dev/null
+++ b/kernel/power/power_off.c
@@ -0,0 +1,26 @@
+/*
+ * kernel/power/power_off.c
+ *
+ * Copyright (C) 2006 Nigel Cunningham <nigel@suspend2.net>
+ *
+ * This file is released under the GPLv2.
+ *
+ * Support for powering down.
+ */
+
+#include <linux/device.h>
+#include <linux/suspend.h>
+#include <linux/mm.h>
+#include <linux/pm.h>
+#include <linux/reboot.h>
+#include "suspend2_common.h"
+#include "suspend2.h"
+#include "ui.h"
+
+unsigned long suspend_powerdown_method = 0; /* 0 - Kernel power off */
+
+extern struct pm_ops *pm_ops;
+
+/* Use suspend_enter from main.c */
+extern int suspend_enter(suspend_state_t state);
+

--
Nigel Cunningham		nigel at suspend2 dot net

[Suspend2][ 2/4] [Suspend2] Try to powerdown using ACPI.

[Nigel Cunningham]

Try to powerdown by entering ACPI S3, S4 or S5.

Signed-off-by: Nigel Cunningham <nigel@suspend2.net>

 kernel/power/power_off.c |   26 ++++++++++++++++++++++++++
 1 files changed, 26 insertions(+), 0 deletions(-)

diff --git a/kernel/power/power_off.c b/kernel/power/power_off.c
index 8f9f425..7f7c565 100644
--- a/kernel/power/power_off.c
+++ b/kernel/power/power_off.c
@@ -24,3 +24,29 @@ extern struct pm_ops *pm_ops;
 /* Use suspend_enter from main.c */
 extern int suspend_enter(suspend_state_t state);
 
+int try_pm_state_powerdown(void)
+{
+	if (pm_ops && pm_ops->prepare && suspend_powerdown_method &&
+	    pm_ops->prepare(suspend_powerdown_method))
+			return 0;
+
+	if (suspend_powerdown_method > 3)
+		kernel_shutdown_prepare(SYSTEM_SUSPEND_DISK);
+	else {
+		if (device_suspend(PMSG_SUSPEND)) {
+			printk(KERN_ERR "Some devices failed to suspend\n");
+			return 0;
+		}
+	}
+
+	if (suspend_enter(suspend_powerdown_method))
+		return 0;
+
+	device_resume();
+
+	if (pm_ops && pm_ops->finish && suspend_powerdown_method)
+		pm_ops->finish(suspend_powerdown_method);
+
+	return 1;
+}
+

--
Nigel Cunningham		nigel at suspend2 dot net

[Suspend2][ 3/4] [Suspend2] Power down general routine.

[Nigel Cunningham]

Powerdown in whatever way the user specified - rebooting being the
overriding option, entering an ACPI state the second choice, doing a simple
power off the third and sitting around in cpu_relax the fallback.

Signed-off-by: Nigel Cunningham <nigel@suspend2.net>

 kernel/power/power_off.c |   28 ++++++++++++++++++++++++++++
 1 files changed, 28 insertions(+), 0 deletions(-)

diff --git a/kernel/power/power_off.c b/kernel/power/power_off.c
index 7f7c565..624ab7b 100644
--- a/kernel/power/power_off.c
+++ b/kernel/power/power_off.c
@@ -50,3 +50,31 @@ int try_pm_state_powerdown(void)
 	return 1;
 }
 
+/*
+ * suspend_power_down
+ * Functionality   : Powers down or reboots the computer once the image
+ *                   has been written to disk.
+ * Key Assumptions : Able to reboot/power down via code called or that
+ *                   the warning emitted if the calls fail will be visible
+ *                   to the user (ie printk resumes devices).
+ * Called From     : do_suspend2_suspend_2
+ */
+
+void suspend_power_down(void)
+{
+	if (test_action_state(SUSPEND_REBOOT)) {
+		suspend_prepare_status(DONT_CLEAR_BAR, "Ready to reboot.");
+		kernel_restart(NULL);
+	}
+
+	suspend_prepare_status(DONT_CLEAR_BAR, "Powering down.");
+
+	if (pm_ops && pm_ops->enter && suspend_powerdown_method && try_pm_state_powerdown())
+		return;
+
+	kernel_power_off();
+	suspend_prepare_status(DONT_CLEAR_BAR, "Powerdown failed");
+	while (1)
+		cpu_relax();
+}
+

--
Nigel Cunningham		nigel at suspend2 dot net

[Suspend2][ 4/4] [Suspend2] Power_off.c header.

[Nigel Cunningham]

Add a declaration for the powerdown function and variable controlling the
method used.

Signed-off-by: Nigel Cunningham <nigel@suspend2.net>

 kernel/power/power_off.h |   13 +++++++++++++
 1 files changed, 13 insertions(+), 0 deletions(-)

diff --git a/kernel/power/power_off.h b/kernel/power/power_off.h
new file mode 100644
index 0000000..921bfec
--- /dev/null
+++ b/kernel/power/power_off.h
@@ -0,0 +1,13 @@
+/*
+ * kernel/power/power_off.h
+ *
+ * Copyright (C) 2006 Nigel Cunningham <nigel@suspend2.net>
+ *
+ * This file is released under the GPLv2.
+ *
+ * Support for the powering down.
+ */
+
+int suspend_pm_state_finish(void);
+void suspend_power_down(void);
+extern unsigned long suspend_powerdown_method;

--
Nigel Cunningham		nigel at suspend2 dot net