#include <linux/dmi.h>
#include <linux/device.h>
#include <linux/suspend.h>
+#include <linux/reboot.h>
#include <asm/io.h>
u8 sleep_states[ACPI_S_STATE_COUNT];
+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
* failing transition to a sleep state.
*/
acpi_target_sleep_state = ACPI_STATE_S0;
+ acpi_sleep_tts_switch(acpi_target_sleep_state);
}
#endif /* CONFIG_PM_SLEEP */
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);
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);
.end = acpi_pm_end,
.recover = acpi_pm_finish,
};
+
+static int __init init_old_suspend_ordering(const struct dmi_system_id *d)
+{
+ old_suspend_ordering = true;
+ return 0;
+}
+
+static struct dmi_system_id __initdata acpisleep_dmi_table[] = {
+ {
+ .callback = init_old_suspend_ordering,
+ .ident = "Abit KN9 (nForce4 variant)",
+ .matches = {
+ DMI_MATCH(DMI_BOARD_VENDOR, "http://www.abit.com.tw/"),
+ DMI_MATCH(DMI_BOARD_NAME, "KN9 Series(NF-CK804)"),
+ },
+ },
+ {},
+};
#endif /* CONFIG_SUSPEND */
#ifdef CONFIG_HIBERNATION
+static unsigned long s4_hardware_signature;
+static struct acpi_table_facs *facs;
+static bool nosigcheck;
+
+void __init acpi_no_s4_hw_signature(void)
+{
+ nosigcheck = true;
+}
+
static int acpi_hibernation_begin(void)
{
acpi_target_sleep_state = ACPI_STATE_S4;
+ acpi_sleep_tts_switch(acpi_target_sleep_state);
return 0;
}
acpi_enable();
/* Reprogram control registers and execute _BFS */
acpi_leave_sleep_state_prep(ACPI_STATE_S4);
+ /* Check the hardware signature */
+ if (facs && s4_hardware_signature != facs->hardware_signature) {
+ printk(KERN_EMERG "ACPI: Hardware changed while hibernated, "
+ "cannot resume!\n");
+ panic("ACPI S4 hardware signature mismatch");
+ }
}
static void acpi_pm_enable_gpes(void)
*/
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;
u8 type_a, type_b;
#ifdef CONFIG_SUSPEND
int i = 0;
+
+ dmi_check_system(acpisleep_dmi_table);
#endif
if (acpi_disabled)
&acpi_hibernation_ops_old : &acpi_hibernation_ops);
sleep_states[ACPI_STATE_S4] = 1;
printk(" S4");
+ if (!nosigcheck) {
+ acpi_get_table_by_index(ACPI_TABLE_INDEX_FACS,
+ (struct acpi_table_header **)&facs);
+ if (facs)
+ s4_hardware_signature =
+ facs->hardware_signature;
+ }
}
#endif
status = acpi_get_sleep_type_data(ACPI_STATE_S5, &type_a, &type_b);
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;
}