[ACPI] ACPI poweroff fix

[safe/jmp/linux-2.6] / drivers / acpi / sleep / poweroff.c

diff --git a/drivers/acpi/sleep/poweroff.c b/drivers/acpi/sleep/poweroff.c
index da23775..1fc86e6 100644 (file)
--- a/drivers/acpi/sleep/poweroff.c
+++ b/drivers/acpi/sleep/poweroff.c
@@ -3,35 +3,100 @@
  *
  * AKA S5, but it is independent of whether or not the kernel supports
  * any other sleep support in the system.
+ *
+ * Copyright (c) 2005 Alexey Starikovskiy <alexey.y.starikovskiy@intel.com>
+ *
+ * This file is released under the GPLv2.
  */
 
 #include <linux/pm.h>
 #include <linux/init.h>
 #include <acpi/acpi_bus.h>
 #include <linux/sched.h>
+#include <linux/sysdev.h>
+#include <asm/io.h>
 #include "sleep.h"
 
-static void
-acpi_power_off (void)
+int acpi_sleep_prepare(u32 acpi_state)
+{
+       /* Flag to do not allow second time invocation for S5 state */
+       static int shutdown_prepared = 0;
+#ifdef CONFIG_ACPI_SLEEP
+       /* do we have a wakeup address for S2 and S3? */
+       /* Here, we support only S4BIOS, those we set the wakeup address */
+       /* S4OS is only supported for now via swsusp.. */
+       if (acpi_state == ACPI_STATE_S3 || acpi_state == ACPI_STATE_S4) {
+               if (!acpi_wakeup_address) {
+                       return -EFAULT;
+               }
+               acpi_set_firmware_waking_vector((acpi_physical_address)
+                                               virt_to_phys((void *)
+                                                            acpi_wakeup_address));
+
+       }
+       ACPI_FLUSH_CPU_CACHE();
+       acpi_enable_wakeup_device_prep(acpi_state);
+#endif
+       if (acpi_state == ACPI_STATE_S5) {
+               /* Check if we were already called */
+               if (shutdown_prepared)
+                       return 0;
+               acpi_wakeup_gpe_poweroff_prepare();
+               shutdown_prepared = 1;
+       }
+       acpi_enter_sleep_state_prep(acpi_state);
+       return 0;
+}
+
+void acpi_power_off(void)
 {
-       printk("%s called\n",__FUNCTION__);
+       printk("%s called\n", __FUNCTION__);
+       acpi_sleep_prepare(ACPI_STATE_S5);
+       local_irq_disable();
        /* Some SMP machines only can poweroff in boot CPU */
        set_cpus_allowed(current, cpumask_of_cpu(0));
-       acpi_wakeup_gpe_poweroff_prepare();
-       acpi_enter_sleep_state_prep(ACPI_STATE_S5);
-       ACPI_DISABLE_IRQS();
        acpi_enter_sleep_state(ACPI_STATE_S5);
 }
 
+#ifdef CONFIG_PM
+
+static int acpi_shutdown(struct sys_device *x)
+{
+       return acpi_sleep_prepare(ACPI_STATE_S5);
+}
+
+static struct sysdev_class acpi_sysclass = {
+       set_kset_name("acpi"),
+       .shutdown = acpi_shutdown
+};
+
+static struct sys_device device_acpi = {
+       .id = 0,
+       .cls = &acpi_sysclass,
+};
+
+#endif
+
 static int acpi_poweroff_init(void)
 {
        if (!acpi_disabled) {
                u8 type_a, type_b;
                acpi_status status;
 
-               status = acpi_get_sleep_type_data(ACPI_STATE_S5, &type_a, &type_b);
-               if (ACPI_SUCCESS(status))
+               status =
+                   acpi_get_sleep_type_data(ACPI_STATE_S5, &type_a, &type_b);
+               if (ACPI_SUCCESS(status)) {
                        pm_power_off = acpi_power_off;
+#ifdef CONFIG_PM
+                       {
+                               int error;
+                               error = sysdev_class_register(&acpi_sysclass);
+                               if (!error)
+                                       error = sysdev_register(&device_acpi);
+                               return error;
+                       }
+#endif
+               }
        }
        return 0;
 }