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authorLen Brown <len.brown@intel.com>2008-10-22 23:28:46 -0400
committerLen Brown <len.brown@intel.com>2008-10-22 23:28:46 -0400
commitacd41d36e5a813501da92156f325ce15ddcd58ff (patch)
treedaaca230153261b13e6d1989a977352e2c29a3d4 /drivers/acpi/sleep
parent4dff4e7f6cbcd2722b02dbb394ba87c4e05f8841 (diff)
parent4fb507b6b764195bb7821cf2baa988f6eb677d30 (diff)
downloadop-kernel-dev-acd41d36e5a813501da92156f325ce15ddcd58ff.zip
op-kernel-dev-acd41d36e5a813501da92156f325ce15ddcd58ff.tar.gz
Merge branch 'suspend' into test
Diffstat (limited to 'drivers/acpi/sleep')
-rw-r--r--drivers/acpi/sleep/main.c59
1 files changed, 58 insertions, 1 deletions
diff --git a/drivers/acpi/sleep/main.c b/drivers/acpi/sleep/main.c
index 4c21480..cc344d4 100644
--- a/drivers/acpi/sleep/main.c
+++ b/drivers/acpi/sleep/main.c
@@ -15,6 +15,7 @@
#include <linux/dmi.h>
#include <linux/device.h>
#include <linux/suspend.h>
+#include <linux/reboot.h>
#include <asm/io.h>
@@ -25,6 +26,36 @@
u8 sleep_states[ACPI_S_STATE_COUNT];
static u32 acpi_target_sleep_state = ACPI_STATE_S0;
+static void acpi_sleep_tts_switch(u32 acpi_state)
+{
+ union acpi_object in_arg = { ACPI_TYPE_INTEGER };
+ struct acpi_object_list arg_list = { 1, &in_arg };
+ acpi_status status = AE_OK;
+
+ in_arg.integer.value = acpi_state;
+ status = acpi_evaluate_object(NULL, "\\_TTS", &arg_list, NULL);
+ if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
+ /*
+ * OS can't evaluate the _TTS object correctly. Some warning
+ * message will be printed. But it won't break anything.
+ */
+ printk(KERN_NOTICE "Failure in evaluating _TTS object\n");
+ }
+}
+
+static int tts_notify_reboot(struct notifier_block *this,
+ unsigned long code, void *x)
+{
+ acpi_sleep_tts_switch(ACPI_STATE_S5);
+ return NOTIFY_DONE;
+}
+
+static struct notifier_block tts_notifier = {
+ .notifier_call = tts_notify_reboot,
+ .next = NULL,
+ .priority = 0,
+};
+
static int acpi_sleep_prepare(u32 acpi_state)
{
#ifdef CONFIG_ACPI_SLEEP
@@ -130,6 +161,7 @@ static void acpi_pm_end(void)
* failing transition to a sleep state.
*/
acpi_target_sleep_state = ACPI_STATE_S0;
+ acpi_sleep_tts_switch(acpi_target_sleep_state);
}
#endif /* CONFIG_ACPI_SLEEP */
@@ -154,6 +186,7 @@ static int acpi_suspend_begin(suspend_state_t pm_state)
if (sleep_states[acpi_state]) {
acpi_target_sleep_state = acpi_state;
+ acpi_sleep_tts_switch(acpi_target_sleep_state);
} else {
printk(KERN_ERR "ACPI does not support this state: %d\n",
pm_state);
@@ -199,6 +232,8 @@ static int acpi_suspend_enter(suspend_state_t pm_state)
break;
}
+ /* If ACPI is not enabled by the BIOS, we need to enable it here. */
+ acpi_enable();
/* Reprogram control registers and execute _BFS */
acpi_leave_sleep_state_prep(acpi_state);
@@ -295,6 +330,14 @@ static struct dmi_system_id __initdata acpisleep_dmi_table[] = {
DMI_MATCH(DMI_BOARD_NAME, "KN9 Series(NF-CK804)"),
},
},
+ {
+ .callback = init_old_suspend_ordering,
+ .ident = "HP xw4600 Workstation",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "HP xw4600 Workstation"),
+ },
+ },
{},
};
#endif /* CONFIG_SUSPEND */
@@ -312,6 +355,7 @@ void __init acpi_no_s4_hw_signature(void)
static int acpi_hibernation_begin(void)
{
acpi_target_sleep_state = ACPI_STATE_S4;
+ acpi_sleep_tts_switch(acpi_target_sleep_state);
return 0;
}
@@ -375,7 +419,15 @@ static struct platform_hibernation_ops acpi_hibernation_ops = {
*/
static int acpi_hibernation_begin_old(void)
{
- int error = acpi_sleep_prepare(ACPI_STATE_S4);
+ int error;
+ /*
+ * The _TTS object should always be evaluated before the _PTS object.
+ * When the old_suspended_ordering is true, the _PTS object is
+ * evaluated in the acpi_sleep_prepare.
+ */
+ acpi_sleep_tts_switch(ACPI_STATE_S4);
+
+ error = acpi_sleep_prepare(ACPI_STATE_S4);
if (!error)
acpi_target_sleep_state = ACPI_STATE_S4;
@@ -595,5 +647,10 @@ int __init acpi_sleep_init(void)
pm_power_off = acpi_power_off;
}
printk(")\n");
+ /*
+ * Register the tts_notifier to reboot notifier list so that the _TTS
+ * object can also be evaluated when the system enters S5.
+ */
+ register_reboot_notifier(&tts_notifier);
return 0;
}
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