kernel-ark/drivers/acpi/sleep/poweroff.c
Pavel Machek b01d8684e9 [PATCH] remove ACPI S4bios support
Remove S4BIOS support.  It is pretty useless, and only ever worked for _me_
once.  (I do not think anyone else ever tried it).  It was in feature-removal
for a long time, and it should have been removed before.

Signed-off-by: Pavel Machek <pavel@suse.cz>
Signed-off-by: Adrian Bunk <bunk@stusta.de>
Cc: "Brown, Len" <len.brown@intel.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-09-10 10:06:35 -07:00

97 lines
2.1 KiB
C

/*
* poweroff.c - ACPI handler for powering off the system.
*
* 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"
int acpi_sleep_prepare(u32 acpi_state)
{
#ifdef CONFIG_ACPI_SLEEP
/* do we have a wakeup address for S2 and S3? */
if (acpi_state == ACPI_STATE_S3) {
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) {
acpi_wakeup_gpe_poweroff_prepare();
}
acpi_enter_sleep_state_prep(acpi_state);
return 0;
}
#ifdef CONFIG_PM
void acpi_power_off(void)
{
/* acpi_sleep_prepare(ACPI_STATE_S5) should have already been called */
printk("%s called\n", __FUNCTION__);
local_irq_disable();
/* Some SMP machines only can poweroff in boot CPU */
acpi_enter_sleep_state(ACPI_STATE_S5);
}
static int acpi_shutdown(struct sys_device *x)
{
if (system_state == SYSTEM_POWER_OFF) {
/* Prepare if we are going to power off the system */
return acpi_sleep_prepare(ACPI_STATE_S5);
}
return 0;
}
static struct sysdev_class acpi_sysclass = {
set_kset_name("acpi"),
.shutdown = acpi_shutdown
};
static struct sys_device device_acpi = {
.id = 0,
.cls = &acpi_sysclass,
};
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)) {
int error;
error = sysdev_class_register(&acpi_sysclass);
if (!error)
error = sysdev_register(&device_acpi);
if (!error)
pm_power_off = acpi_power_off;
return error;
}
}
return 0;
}
late_initcall(acpi_poweroff_init);
#endif /* CONFIG_PM */