ACPI: rename main.c to sleep.c
Signed-off-by: Len Brown <len.brown@intel.com>
This commit is contained in:
Len Brown
747
drivers/acpi/sleep.c
Normal file
747
drivers/acpi/sleep.c
Normal file
@@ -0,0 +1,747 @@
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/*
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* sleep.c - ACPI sleep support.
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*
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* Copyright (c) 2005 Alexey Starikovskiy <alexey.y.starikovskiy@intel.com>
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* Copyright (c) 2004 David Shaohua Li <shaohua.li@intel.com>
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* Copyright (c) 2000-2003 Patrick Mochel
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* Copyright (c) 2003 Open Source Development Lab
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*
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* This file is released under the GPLv2.
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*
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*/
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#include <linux/delay.h>
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#include <linux/irq.h>
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#include <linux/dmi.h>
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#include <linux/device.h>
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#include <linux/suspend.h>
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#include <linux/reboot.h>
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#include <asm/io.h>
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#include <acpi/acpi_bus.h>
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#include <acpi/acpi_drivers.h>
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#include "sleep.h"
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u8 sleep_states[ACPI_S_STATE_COUNT];
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static void acpi_sleep_tts_switch(u32 acpi_state)
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{
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union acpi_object in_arg = { ACPI_TYPE_INTEGER };
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struct acpi_object_list arg_list = { 1, &in_arg };
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acpi_status status = AE_OK;
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in_arg.integer.value = acpi_state;
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status = acpi_evaluate_object(NULL, "\\_TTS", &arg_list, NULL);
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if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
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/*
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* OS can't evaluate the _TTS object correctly. Some warning
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* message will be printed. But it won't break anything.
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*/
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printk(KERN_NOTICE "Failure in evaluating _TTS object\n");
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}
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}
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static int tts_notify_reboot(struct notifier_block *this,
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unsigned long code, void *x)
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{
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acpi_sleep_tts_switch(ACPI_STATE_S5);
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return NOTIFY_DONE;
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}
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static struct notifier_block tts_notifier = {
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.notifier_call = tts_notify_reboot,
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.next = NULL,
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.priority = 0,
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};
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static int acpi_sleep_prepare(u32 acpi_state)
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{
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#ifdef CONFIG_ACPI_SLEEP
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/* do we have a wakeup address for S2 and S3? */
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if (acpi_state == ACPI_STATE_S3) {
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if (!acpi_wakeup_address) {
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return -EFAULT;
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}
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acpi_set_firmware_waking_vector(
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(acpi_physical_address)acpi_wakeup_address);
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}
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ACPI_FLUSH_CPU_CACHE();
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acpi_enable_wakeup_device_prep(acpi_state);
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#endif
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printk(KERN_INFO PREFIX "Preparing to enter system sleep state S%d\n",
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acpi_state);
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acpi_enter_sleep_state_prep(acpi_state);
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return 0;
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}
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#ifdef CONFIG_ACPI_SLEEP
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static u32 acpi_target_sleep_state = ACPI_STATE_S0;
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/*
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* ACPI 1.0 wants us to execute _PTS before suspending devices, so we allow the
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* user to request that behavior by using the 'acpi_old_suspend_ordering'
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* kernel command line option that causes the following variable to be set.
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*/
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static bool old_suspend_ordering;
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void __init acpi_old_suspend_ordering(void)
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{
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old_suspend_ordering = true;
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}
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/*
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* According to the ACPI specification the BIOS should make sure that ACPI is
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* enabled and SCI_EN bit is set on wake-up from S1 - S3 sleep states. Still,
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* some BIOSes don't do that and therefore we use acpi_enable() to enable ACPI
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* on such systems during resume. Unfortunately that doesn't help in
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* particularly pathological cases in which SCI_EN has to be set directly on
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* resume, although the specification states very clearly that this flag is
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* owned by the hardware. The set_sci_en_on_resume variable will be set in such
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* cases.
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*/
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static bool set_sci_en_on_resume;
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/*
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* The ACPI specification wants us to save NVS memory regions during hibernation
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* and to restore them during the subsequent resume. However, it is not certain
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* if this mechanism is going to work on all machines, so we allow the user to
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* disable this mechanism using the 'acpi_sleep=s4_nonvs' kernel command line
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* option.
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*/
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static bool s4_no_nvs;
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void __init acpi_s4_no_nvs(void)
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{
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s4_no_nvs = true;
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}
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/**
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* acpi_pm_disable_gpes - Disable the GPEs.
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*/
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static int acpi_pm_disable_gpes(void)
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{
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acpi_disable_all_gpes();
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return 0;
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}
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/**
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* __acpi_pm_prepare - Prepare the platform to enter the target state.
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*
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* If necessary, set the firmware waking vector and do arch-specific
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* nastiness to get the wakeup code to the waking vector.
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*/
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static int __acpi_pm_prepare(void)
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{
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int error = acpi_sleep_prepare(acpi_target_sleep_state);
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if (error)
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acpi_target_sleep_state = ACPI_STATE_S0;
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return error;
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}
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/**
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* acpi_pm_prepare - Prepare the platform to enter the target sleep
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* state and disable the GPEs.
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*/
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static int acpi_pm_prepare(void)
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{
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int error = __acpi_pm_prepare();
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if (!error)
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acpi_disable_all_gpes();
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return error;
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}
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/**
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* acpi_pm_finish - Instruct the platform to leave a sleep state.
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*
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* This is called after we wake back up (or if entering the sleep state
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* failed).
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*/
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static void acpi_pm_finish(void)
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{
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u32 acpi_state = acpi_target_sleep_state;
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if (acpi_state == ACPI_STATE_S0)
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return;
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printk(KERN_INFO PREFIX "Waking up from system sleep state S%d\n",
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acpi_state);
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acpi_disable_wakeup_device(acpi_state);
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acpi_leave_sleep_state(acpi_state);
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/* reset firmware waking vector */
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acpi_set_firmware_waking_vector((acpi_physical_address) 0);
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acpi_target_sleep_state = ACPI_STATE_S0;
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}
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/**
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* acpi_pm_end - Finish up suspend sequence.
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*/
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static void acpi_pm_end(void)
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{
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/*
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* This is necessary in case acpi_pm_finish() is not called during a
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* failing transition to a sleep state.
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*/
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acpi_target_sleep_state = ACPI_STATE_S0;
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acpi_sleep_tts_switch(acpi_target_sleep_state);
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}
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#else /* !CONFIG_ACPI_SLEEP */
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#define acpi_target_sleep_state ACPI_STATE_S0
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#endif /* CONFIG_ACPI_SLEEP */
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#ifdef CONFIG_SUSPEND
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extern void do_suspend_lowlevel(void);
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static u32 acpi_suspend_states[] = {
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[PM_SUSPEND_ON] = ACPI_STATE_S0,
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[PM_SUSPEND_STANDBY] = ACPI_STATE_S1,
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[PM_SUSPEND_MEM] = ACPI_STATE_S3,
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[PM_SUSPEND_MAX] = ACPI_STATE_S5
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};
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/**
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* acpi_suspend_begin - Set the target system sleep state to the state
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* associated with given @pm_state, if supported.
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*/
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static int acpi_suspend_begin(suspend_state_t pm_state)
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{
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u32 acpi_state = acpi_suspend_states[pm_state];
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int error = 0;
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if (sleep_states[acpi_state]) {
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acpi_target_sleep_state = acpi_state;
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acpi_sleep_tts_switch(acpi_target_sleep_state);
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} else {
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printk(KERN_ERR "ACPI does not support this state: %d\n",
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pm_state);
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error = -ENOSYS;
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}
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return error;
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}
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/**
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* acpi_suspend_enter - Actually enter a sleep state.
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* @pm_state: ignored
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*
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* Flush caches and go to sleep. For STR we have to call arch-specific
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* assembly, which in turn call acpi_enter_sleep_state().
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* It's unfortunate, but it works. Please fix if you're feeling frisky.
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*/
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static int acpi_suspend_enter(suspend_state_t pm_state)
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{
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acpi_status status = AE_OK;
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unsigned long flags = 0;
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u32 acpi_state = acpi_target_sleep_state;
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ACPI_FLUSH_CPU_CACHE();
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/* Do arch specific saving of state. */
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if (acpi_state == ACPI_STATE_S3) {
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int error = acpi_save_state_mem();
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if (error)
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return error;
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}
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local_irq_save(flags);
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acpi_enable_wakeup_device(acpi_state);
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switch (acpi_state) {
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case ACPI_STATE_S1:
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barrier();
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status = acpi_enter_sleep_state(acpi_state);
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break;
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case ACPI_STATE_S3:
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do_suspend_lowlevel();
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break;
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}
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/* If ACPI is not enabled by the BIOS, we need to enable it here. */
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if (set_sci_en_on_resume)
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acpi_set_register(ACPI_BITREG_SCI_ENABLE, 1);
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else
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acpi_enable();
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/* Reprogram control registers and execute _BFS */
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acpi_leave_sleep_state_prep(acpi_state);
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/* ACPI 3.0 specs (P62) says that it's the responsibility
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* of the OSPM to clear the status bit [ implying that the
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* POWER_BUTTON event should not reach userspace ]
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*/
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if (ACPI_SUCCESS(status) && (acpi_state == ACPI_STATE_S3))
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acpi_clear_event(ACPI_EVENT_POWER_BUTTON);
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/*
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* Disable and clear GPE status before interrupt is enabled. Some GPEs
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* (like wakeup GPE) haven't handler, this can avoid such GPE misfire.
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* acpi_leave_sleep_state will reenable specific GPEs later
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*/
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acpi_disable_all_gpes();
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local_irq_restore(flags);
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printk(KERN_DEBUG "Back to C!\n");
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/* restore processor state */
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if (acpi_state == ACPI_STATE_S3)
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acpi_restore_state_mem();
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return ACPI_SUCCESS(status) ? 0 : -EFAULT;
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}
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static int acpi_suspend_state_valid(suspend_state_t pm_state)
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{
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u32 acpi_state;
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switch (pm_state) {
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case PM_SUSPEND_ON:
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case PM_SUSPEND_STANDBY:
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case PM_SUSPEND_MEM:
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acpi_state = acpi_suspend_states[pm_state];
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return sleep_states[acpi_state];
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default:
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return 0;
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}
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}
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static struct platform_suspend_ops acpi_suspend_ops = {
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.valid = acpi_suspend_state_valid,
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.begin = acpi_suspend_begin,
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.prepare = acpi_pm_prepare,
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.enter = acpi_suspend_enter,
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.finish = acpi_pm_finish,
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.end = acpi_pm_end,
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};
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/**
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* acpi_suspend_begin_old - Set the target system sleep state to the
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* state associated with given @pm_state, if supported, and
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* execute the _PTS control method. This function is used if the
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* pre-ACPI 2.0 suspend ordering has been requested.
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*/
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static int acpi_suspend_begin_old(suspend_state_t pm_state)
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{
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int error = acpi_suspend_begin(pm_state);
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if (!error)
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error = __acpi_pm_prepare();
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return error;
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}
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/*
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* The following callbacks are used if the pre-ACPI 2.0 suspend ordering has
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* been requested.
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*/
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static struct platform_suspend_ops acpi_suspend_ops_old = {
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.valid = acpi_suspend_state_valid,
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.begin = acpi_suspend_begin_old,
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.prepare = acpi_pm_disable_gpes,
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.enter = acpi_suspend_enter,
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.finish = acpi_pm_finish,
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.end = acpi_pm_end,
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.recover = acpi_pm_finish,
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};
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static int __init init_old_suspend_ordering(const struct dmi_system_id *d)
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{
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old_suspend_ordering = true;
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return 0;
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}
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static int __init init_set_sci_en_on_resume(const struct dmi_system_id *d)
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{
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set_sci_en_on_resume = true;
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return 0;
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}
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static struct dmi_system_id __initdata acpisleep_dmi_table[] = {
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{
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.callback = init_old_suspend_ordering,
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.ident = "Abit KN9 (nForce4 variant)",
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.matches = {
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DMI_MATCH(DMI_BOARD_VENDOR, "http://www.abit.com.tw/"),
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DMI_MATCH(DMI_BOARD_NAME, "KN9 Series(NF-CK804)"),
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},
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},
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{
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.callback = init_old_suspend_ordering,
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.ident = "HP xw4600 Workstation",
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.matches = {
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DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
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DMI_MATCH(DMI_PRODUCT_NAME, "HP xw4600 Workstation"),
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},
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},
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{
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.callback = init_set_sci_en_on_resume,
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.ident = "Apple MacBook 1,1",
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.matches = {
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DMI_MATCH(DMI_SYS_VENDOR, "Apple Computer, Inc."),
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DMI_MATCH(DMI_PRODUCT_NAME, "MacBook1,1"),
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},
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},
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{
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.callback = init_set_sci_en_on_resume,
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.ident = "Apple MacMini 1,1",
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.matches = {
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DMI_MATCH(DMI_SYS_VENDOR, "Apple Computer, Inc."),
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DMI_MATCH(DMI_PRODUCT_NAME, "Macmini1,1"),
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},
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},
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{},
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};
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#endif /* CONFIG_SUSPEND */
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#ifdef CONFIG_HIBERNATION
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static unsigned long s4_hardware_signature;
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static struct acpi_table_facs *facs;
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static bool nosigcheck;
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void __init acpi_no_s4_hw_signature(void)
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{
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nosigcheck = true;
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}
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static int acpi_hibernation_begin(void)
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{
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int error;
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error = s4_no_nvs ? 0 : hibernate_nvs_alloc();
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if (!error) {
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acpi_target_sleep_state = ACPI_STATE_S4;
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acpi_sleep_tts_switch(acpi_target_sleep_state);
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}
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return error;
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}
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static int acpi_hibernation_pre_snapshot(void)
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{
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int error = acpi_pm_prepare();
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if (!error)
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hibernate_nvs_save();
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return error;
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}
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static int acpi_hibernation_enter(void)
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{
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acpi_status status = AE_OK;
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unsigned long flags = 0;
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ACPI_FLUSH_CPU_CACHE();
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local_irq_save(flags);
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acpi_enable_wakeup_device(ACPI_STATE_S4);
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/* This shouldn't return. If it returns, we have a problem */
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status = acpi_enter_sleep_state(ACPI_STATE_S4);
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/* Reprogram control registers and execute _BFS */
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acpi_leave_sleep_state_prep(ACPI_STATE_S4);
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local_irq_restore(flags);
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return ACPI_SUCCESS(status) ? 0 : -EFAULT;
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}
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static void acpi_hibernation_finish(void)
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{
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hibernate_nvs_free();
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acpi_pm_finish();
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}
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static void acpi_hibernation_leave(void)
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{
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/*
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* If ACPI is not enabled by the BIOS and the boot kernel, we need to
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* enable it here.
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*/
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acpi_enable();
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/* Reprogram control registers and execute _BFS */
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acpi_leave_sleep_state_prep(ACPI_STATE_S4);
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/* Check the hardware signature */
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if (facs && s4_hardware_signature != facs->hardware_signature) {
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printk(KERN_EMERG "ACPI: Hardware changed while hibernated, "
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"cannot resume!\n");
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panic("ACPI S4 hardware signature mismatch");
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}
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/* Restore the NVS memory area */
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hibernate_nvs_restore();
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}
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static void acpi_pm_enable_gpes(void)
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{
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acpi_enable_all_runtime_gpes();
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}
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static struct platform_hibernation_ops acpi_hibernation_ops = {
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.begin = acpi_hibernation_begin,
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.end = acpi_pm_end,
|
||||
.pre_snapshot = acpi_hibernation_pre_snapshot,
|
||||
.finish = acpi_hibernation_finish,
|
||||
.prepare = acpi_pm_prepare,
|
||||
.enter = acpi_hibernation_enter,
|
||||
.leave = acpi_hibernation_leave,
|
||||
.pre_restore = acpi_pm_disable_gpes,
|
||||
.restore_cleanup = acpi_pm_enable_gpes,
|
||||
};
|
||||
|
||||
/**
|
||||
* acpi_hibernation_begin_old - Set the target system sleep state to
|
||||
* ACPI_STATE_S4 and execute the _PTS control method. This
|
||||
* function is used if the pre-ACPI 2.0 suspend ordering has been
|
||||
* requested.
|
||||
*/
|
||||
static int acpi_hibernation_begin_old(void)
|
||||
{
|
||||
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) {
|
||||
if (!s4_no_nvs)
|
||||
error = hibernate_nvs_alloc();
|
||||
if (!error)
|
||||
acpi_target_sleep_state = ACPI_STATE_S4;
|
||||
}
|
||||
return error;
|
||||
}
|
||||
|
||||
static int acpi_hibernation_pre_snapshot_old(void)
|
||||
{
|
||||
int error = acpi_pm_disable_gpes();
|
||||
|
||||
if (!error)
|
||||
hibernate_nvs_save();
|
||||
|
||||
return error;
|
||||
}
|
||||
|
||||
/*
|
||||
* The following callbacks are used if the pre-ACPI 2.0 suspend ordering has
|
||||
* been requested.
|
||||
*/
|
||||
static struct platform_hibernation_ops acpi_hibernation_ops_old = {
|
||||
.begin = acpi_hibernation_begin_old,
|
||||
.end = acpi_pm_end,
|
||||
.pre_snapshot = acpi_hibernation_pre_snapshot_old,
|
||||
.finish = acpi_hibernation_finish,
|
||||
.prepare = acpi_pm_disable_gpes,
|
||||
.enter = acpi_hibernation_enter,
|
||||
.leave = acpi_hibernation_leave,
|
||||
.pre_restore = acpi_pm_disable_gpes,
|
||||
.restore_cleanup = acpi_pm_enable_gpes,
|
||||
.recover = acpi_pm_finish,
|
||||
};
|
||||
#endif /* CONFIG_HIBERNATION */
|
||||
|
||||
int acpi_suspend(u32 acpi_state)
|
||||
{
|
||||
suspend_state_t states[] = {
|
||||
[1] = PM_SUSPEND_STANDBY,
|
||||
[3] = PM_SUSPEND_MEM,
|
||||
[5] = PM_SUSPEND_MAX
|
||||
};
|
||||
|
||||
if (acpi_state < 6 && states[acpi_state])
|
||||
return pm_suspend(states[acpi_state]);
|
||||
if (acpi_state == 4)
|
||||
return hibernate();
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
#ifdef CONFIG_PM_SLEEP
|
||||
/**
|
||||
* acpi_pm_device_sleep_state - return preferred power state of ACPI device
|
||||
* in the system sleep state given by %acpi_target_sleep_state
|
||||
* @dev: device to examine; its driver model wakeup flags control
|
||||
* whether it should be able to wake up the system
|
||||
* @d_min_p: used to store the upper limit of allowed states range
|
||||
* Return value: preferred power state of the device on success, -ENODEV on
|
||||
* failure (ie. if there's no 'struct acpi_device' for @dev)
|
||||
*
|
||||
* Find the lowest power (highest number) ACPI device power state that
|
||||
* device @dev can be in while the system is in the sleep state represented
|
||||
* by %acpi_target_sleep_state. If @wake is nonzero, the device should be
|
||||
* able to wake up the system from this sleep state. If @d_min_p is set,
|
||||
* the highest power (lowest number) device power state of @dev allowed
|
||||
* in this system sleep state is stored at the location pointed to by it.
|
||||
*
|
||||
* The caller must ensure that @dev is valid before using this function.
|
||||
* The caller is also responsible for figuring out if the device is
|
||||
* supposed to be able to wake up the system and passing this information
|
||||
* via @wake.
|
||||
*/
|
||||
|
||||
int acpi_pm_device_sleep_state(struct device *dev, int *d_min_p)
|
||||
{
|
||||
acpi_handle handle = DEVICE_ACPI_HANDLE(dev);
|
||||
struct acpi_device *adev;
|
||||
char acpi_method[] = "_SxD";
|
||||
unsigned long long d_min, d_max;
|
||||
|
||||
if (!handle || ACPI_FAILURE(acpi_bus_get_device(handle, &adev))) {
|
||||
printk(KERN_DEBUG "ACPI handle has no context!\n");
|
||||
return -ENODEV;
|
||||
}
|
||||
|
||||
acpi_method[2] = '0' + acpi_target_sleep_state;
|
||||
/*
|
||||
* If the sleep state is S0, we will return D3, but if the device has
|
||||
* _S0W, we will use the value from _S0W
|
||||
*/
|
||||
d_min = ACPI_STATE_D0;
|
||||
d_max = ACPI_STATE_D3;
|
||||
|
||||
/*
|
||||
* If present, _SxD methods return the minimum D-state (highest power
|
||||
* state) we can use for the corresponding S-states. Otherwise, the
|
||||
* minimum D-state is D0 (ACPI 3.x).
|
||||
*
|
||||
* NOTE: We rely on acpi_evaluate_integer() not clobbering the integer
|
||||
* provided -- that's our fault recovery, we ignore retval.
|
||||
*/
|
||||
if (acpi_target_sleep_state > ACPI_STATE_S0)
|
||||
acpi_evaluate_integer(handle, acpi_method, NULL, &d_min);
|
||||
|
||||
/*
|
||||
* If _PRW says we can wake up the system from the target sleep state,
|
||||
* the D-state returned by _SxD is sufficient for that (we assume a
|
||||
* wakeup-aware driver if wake is set). Still, if _SxW exists
|
||||
* (ACPI 3.x), it should return the maximum (lowest power) D-state that
|
||||
* can wake the system. _S0W may be valid, too.
|
||||
*/
|
||||
if (acpi_target_sleep_state == ACPI_STATE_S0 ||
|
||||
(device_may_wakeup(dev) && adev->wakeup.state.enabled &&
|
||||
adev->wakeup.sleep_state <= acpi_target_sleep_state)) {
|
||||
acpi_status status;
|
||||
|
||||
acpi_method[3] = 'W';
|
||||
status = acpi_evaluate_integer(handle, acpi_method, NULL,
|
||||
&d_max);
|
||||
if (ACPI_FAILURE(status)) {
|
||||
d_max = d_min;
|
||||
} else if (d_max < d_min) {
|
||||
/* Warn the user of the broken DSDT */
|
||||
printk(KERN_WARNING "ACPI: Wrong value from %s\n",
|
||||
acpi_method);
|
||||
/* Sanitize it */
|
||||
d_min = d_max;
|
||||
}
|
||||
}
|
||||
|
||||
if (d_min_p)
|
||||
*d_min_p = d_min;
|
||||
return d_max;
|
||||
}
|
||||
|
||||
/**
|
||||
* acpi_pm_device_sleep_wake - enable or disable the system wake-up
|
||||
* capability of given device
|
||||
* @dev: device to handle
|
||||
* @enable: 'true' - enable, 'false' - disable the wake-up capability
|
||||
*/
|
||||
int acpi_pm_device_sleep_wake(struct device *dev, bool enable)
|
||||
{
|
||||
acpi_handle handle;
|
||||
struct acpi_device *adev;
|
||||
|
||||
if (!device_may_wakeup(dev))
|
||||
return -EINVAL;
|
||||
|
||||
handle = DEVICE_ACPI_HANDLE(dev);
|
||||
if (!handle || ACPI_FAILURE(acpi_bus_get_device(handle, &adev))) {
|
||||
printk(KERN_DEBUG "ACPI handle has no context!\n");
|
||||
return -ENODEV;
|
||||
}
|
||||
|
||||
return enable ?
|
||||
acpi_enable_wakeup_device_power(adev, acpi_target_sleep_state) :
|
||||
acpi_disable_wakeup_device_power(adev);
|
||||
}
|
||||
#endif
|
||||
|
||||
static void acpi_power_off_prepare(void)
|
||||
{
|
||||
/* Prepare to power off the system */
|
||||
acpi_sleep_prepare(ACPI_STATE_S5);
|
||||
acpi_disable_all_gpes();
|
||||
}
|
||||
|
||||
static void acpi_power_off(void)
|
||||
{
|
||||
/* acpi_sleep_prepare(ACPI_STATE_S5) should have already been called */
|
||||
printk("%s called\n", __func__);
|
||||
local_irq_disable();
|
||||
acpi_enable_wakeup_device(ACPI_STATE_S5);
|
||||
acpi_enter_sleep_state(ACPI_STATE_S5);
|
||||
}
|
||||
|
||||
int __init acpi_sleep_init(void)
|
||||
{
|
||||
acpi_status status;
|
||||
u8 type_a, type_b;
|
||||
#ifdef CONFIG_SUSPEND
|
||||
int i = 0;
|
||||
|
||||
dmi_check_system(acpisleep_dmi_table);
|
||||
#endif
|
||||
|
||||
if (acpi_disabled)
|
||||
return 0;
|
||||
|
||||
sleep_states[ACPI_STATE_S0] = 1;
|
||||
printk(KERN_INFO PREFIX "(supports S0");
|
||||
|
||||
#ifdef CONFIG_SUSPEND
|
||||
for (i = ACPI_STATE_S1; i < ACPI_STATE_S4; i++) {
|
||||
status = acpi_get_sleep_type_data(i, &type_a, &type_b);
|
||||
if (ACPI_SUCCESS(status)) {
|
||||
sleep_states[i] = 1;
|
||||
printk(" S%d", i);
|
||||
}
|
||||
}
|
||||
|
||||
suspend_set_ops(old_suspend_ordering ?
|
||||
&acpi_suspend_ops_old : &acpi_suspend_ops);
|
||||
#endif
|
||||
|
||||
#ifdef CONFIG_HIBERNATION
|
||||
status = acpi_get_sleep_type_data(ACPI_STATE_S4, &type_a, &type_b);
|
||||
if (ACPI_SUCCESS(status)) {
|
||||
hibernation_set_ops(old_suspend_ordering ?
|
||||
&acpi_hibernation_ops_old : &acpi_hibernation_ops);
|
||||
sleep_states[ACPI_STATE_S4] = 1;
|
||||
printk(" S4");
|
||||
if (!nosigcheck) {
|
||||
acpi_get_table(ACPI_SIG_FACS, 1,
|
||||
(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);
|
||||
if (ACPI_SUCCESS(status)) {
|
||||
sleep_states[ACPI_STATE_S5] = 1;
|
||||
printk(" S5");
|
||||
pm_power_off_prepare = acpi_power_off_prepare;
|
||||
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;
|
||||
}
|
||||
Reference in New Issue
Block a user