From d08ca2ca743f324eceba59e93188f9439e966bce Mon Sep 17 00:00:00 2001
From: Len Brown <len.brown@intel.com>
Date: Fri, 16 Jan 2009 13:52:03 -0500
Subject: ACPI: rename main.c to sleep.c
Signed-off-by: Len Brown <len.brown@intel.com>
---
drivers/acpi/sleep.c | 747 +++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 747 insertions(+)
create mode 100644 drivers/acpi/sleep.c
(limited to 'drivers/acpi/sleep.c')
diff --git a/drivers/acpi/sleep.c b/drivers/acpi/sleep.c
new file mode 100644
index 00000000000..7e3c609cbef
--- /dev/null
+++ b/drivers/acpi/sleep.c
@@ -0,0 +1,747 @@
+/*
+ * sleep.c - ACPI sleep support.
+ *
+ * Copyright (c) 2005 Alexey Starikovskiy <alexey.y.starikovskiy@intel.com>
+ * Copyright (c) 2004 David Shaohua Li <shaohua.li@intel.com>
+ * Copyright (c) 2000-2003 Patrick Mochel
+ * Copyright (c) 2003 Open Source Development Lab
+ *
+ * This file is released under the GPLv2.
+ *
+ */
+
+#include <linux/delay.h>
+#include <linux/irq.h>
+#include <linux/dmi.h>
+#include <linux/device.h>
+#include <linux/suspend.h>
+#include <linux/reboot.h>
+
+#include <asm/io.h>
+
+#include <acpi/acpi_bus.h>
+#include <acpi/acpi_drivers.h>
+#include "sleep.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
+ /* 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)acpi_wakeup_address);
+
+ }
+ ACPI_FLUSH_CPU_CACHE();
+ acpi_enable_wakeup_device_prep(acpi_state);
+#endif
+ printk(KERN_INFO PREFIX "Preparing to enter system sleep state S%d\n",
+ acpi_state);
+ acpi_enter_sleep_state_prep(acpi_state);
+ return 0;
+}
+
+#ifdef CONFIG_ACPI_SLEEP
+static u32 acpi_target_sleep_state = ACPI_STATE_S0;
+/*
+ * ACPI 1.0 wants us to execute _PTS before suspending devices, so we allow the
+ * user to request that behavior by using the 'acpi_old_suspend_ordering'
+ * kernel command line option that causes the following variable to be set.
+ */
+static bool old_suspend_ordering;
+
+void __init acpi_old_suspend_ordering(void)
+{
+ old_suspend_ordering = true;
+}
+
+/*
+ * According to the ACPI specification the BIOS should make sure that ACPI is
+ * enabled and SCI_EN bit is set on wake-up from S1 - S3 sleep states. Still,
+ * some BIOSes don't do that and therefore we use acpi_enable() to enable ACPI
+ * on such systems during resume. Unfortunately that doesn't help in
+ * particularly pathological cases in which SCI_EN has to be set directly on
+ * resume, although the specification states very clearly that this flag is
+ * owned by the hardware. The set_sci_en_on_resume variable will be set in such
+ * cases.
+ */
+static bool set_sci_en_on_resume;
+/*
+ * The ACPI specification wants us to save NVS memory regions during hibernation
+ * and to restore them during the subsequent resume. However, it is not certain
+ * if this mechanism is going to work on all machines, so we allow the user to
+ * disable this mechanism using the 'acpi_sleep=s4_nonvs' kernel command line
+ * option.
+ */
+static bool s4_no_nvs;
+
+void __init acpi_s4_no_nvs(void)
+{
+ s4_no_nvs = true;
+}
+
+/**
+ * acpi_pm_disable_gpes - Disable the GPEs.
+ */
+static int acpi_pm_disable_gpes(void)
+{
+ acpi_disable_all_gpes();
+ return 0;
+}
+
+/**
+ * __acpi_pm_prepare - Prepare the platform to enter the target state.
+ *
+ * If necessary, set the firmware waking vector and do arch-specific
+ * nastiness to get the wakeup code to the waking vector.
+ */
+static int __acpi_pm_prepare(void)
+{
+ int error = acpi_sleep_prepare(acpi_target_sleep_state);
+
+ if (error)
+ acpi_target_sleep_state = ACPI_STATE_S0;
+ return error;
+}
+
+/**
+ * acpi_pm_prepare - Prepare the platform to enter the target sleep
+ * state and disable the GPEs.
+ */
+static int acpi_pm_prepare(void)
+{
+ int error = __acpi_pm_prepare();
+
+ if (!error)
+ acpi_disable_all_gpes();
+ return error;
+}
+
+/**
+ * acpi_pm_finish - Instruct the platform to leave a sleep state.
+ *
+ * This is called after we wake back up (or if entering the sleep state
+ * failed).
+ */
+static void acpi_pm_finish(void)
+{
+ u32 acpi_state = acpi_target_sleep_state;
+
+ if (acpi_state == ACPI_STATE_S0)
+ return;
+
+ printk(KERN_INFO PREFIX "Waking up from system sleep state S%d\n",
+ acpi_state);
+ acpi_disable_wakeup_device(acpi_state);
+ acpi_leave_sleep_state(acpi_state);
+
+ /* reset firmware waking vector */
+ acpi_set_firmware_waking_vector((acpi_physical_address) 0);
+
+ acpi_target_sleep_state = ACPI_STATE_S0;
+}
+
+/**
+ * acpi_pm_end - Finish up suspend sequence.
+ */
+static void acpi_pm_end(void)
+{
+ /*
+ * This is necessary in case acpi_pm_finish() is not called during a
+ * failing transition to a sleep state.
+ */
+ acpi_target_sleep_state = ACPI_STATE_S0;
+ acpi_sleep_tts_switch(acpi_target_sleep_state);
+}
+#else /* !CONFIG_ACPI_SLEEP */
+#define acpi_target_sleep_state ACPI_STATE_S0
+#endif /* CONFIG_ACPI_SLEEP */
+
+#ifdef CONFIG_SUSPEND
+extern void do_suspend_lowlevel(void);
+
+static u32 acpi_suspend_states[] = {
+ [PM_SUSPEND_ON] = ACPI_STATE_S0,
+ [PM_SUSPEND_STANDBY] = ACPI_STATE_S1,
+ [PM_SUSPEND_MEM] = ACPI_STATE_S3,
+ [PM_SUSPEND_MAX] = ACPI_STATE_S5
+};
+
+/**
+ * acpi_suspend_begin - Set the target system sleep state to the state
+ * associated with given @pm_state, if supported.
+ */
+static int acpi_suspend_begin(suspend_state_t pm_state)
+{
+ u32 acpi_state = acpi_suspend_states[pm_state];
+ int error = 0;
+
+ 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);
+ error = -ENOSYS;
+ }
+ return error;
+}
+
+/**
+ * acpi_suspend_enter - Actually enter a sleep state.
+ * @pm_state: ignored
+ *
+ * Flush caches and go to sleep. For STR we have to call arch-specific
+ * assembly, which in turn call acpi_enter_sleep_state().
+ * It's unfortunate, but it works. Please fix if you're feeling frisky.
+ */
+static int acpi_suspend_enter(suspend_state_t pm_state)
+{
+ acpi_status status = AE_OK;
+ unsigned long flags = 0;
+ u32 acpi_state = acpi_target_sleep_state;
+
+ ACPI_FLUSH_CPU_CACHE();
+
+ /* Do arch specific saving of state. */
+ if (acpi_state == ACPI_STATE_S3) {
+ int error = acpi_save_state_mem();
+
+ if (error)
+ return error;
+ }
+
+ local_irq_save(flags);
+ acpi_enable_wakeup_device(acpi_state);
+ switch (acpi_state) {
+ case ACPI_STATE_S1:
+ barrier();
+ status = acpi_enter_sleep_state(acpi_state);
+ break;
+
+ case ACPI_STATE_S3:
+ do_suspend_lowlevel();
+ break;
+ }
+
+ /* If ACPI is not enabled by the BIOS, we need to enable it here. */
+ if (set_sci_en_on_resume)
+ acpi_set_register(ACPI_BITREG_SCI_ENABLE, 1);
+ else
+ acpi_enable();
+
+ /* Reprogram control registers and execute _BFS */
+ acpi_leave_sleep_state_prep(acpi_state);
+
+ /* ACPI 3.0 specs (P62) says that it's the responsibility
+ * of the OSPM to clear the status bit [ implying that the
+ * POWER_BUTTON event should not reach userspace ]
+ */
+ if (ACPI_SUCCESS(status) && (acpi_state == ACPI_STATE_S3))
+ acpi_clear_event(ACPI_EVENT_POWER_BUTTON);
+
+ /*
+ * Disable and clear GPE status before interrupt is enabled. Some GPEs
+ * (like wakeup GPE) haven't handler, this can avoid such GPE misfire.
+ * acpi_leave_sleep_state will reenable specific GPEs later
+ */
+ acpi_disable_all_gpes();
+
+ local_irq_restore(flags);
+ printk(KERN_DEBUG "Back to C!\n");
+
+ /* restore processor state */
+ if (acpi_state == ACPI_STATE_S3)
+ acpi_restore_state_mem();
+
+ return ACPI_SUCCESS(status) ? 0 : -EFAULT;
+}
+
+static int acpi_suspend_state_valid(suspend_state_t pm_state)
+{
+ u32 acpi_state;
+
+ switch (pm_state) {
+ case PM_SUSPEND_ON:
+ case PM_SUSPEND_STANDBY:
+ case PM_SUSPEND_MEM:
+ acpi_state = acpi_suspend_states[pm_state];
+
+ return sleep_states[acpi_state];
+ default:
+ return 0;
+ }
+}
+
+static struct platform_suspend_ops acpi_suspend_ops = {
+ .valid = acpi_suspend_state_valid,
+ .begin = acpi_suspend_begin,
+ .prepare = acpi_pm_prepare,
+ .enter = acpi_suspend_enter,
+ .finish = acpi_pm_finish,
+ .end = acpi_pm_end,
+};
+
+/**
+ * acpi_suspend_begin_old - Set the target system sleep state to the
+ * state associated with given @pm_state, if supported, and
+ * execute the _PTS control method. This function is used if the
+ * pre-ACPI 2.0 suspend ordering has been requested.
+ */
+static int acpi_suspend_begin_old(suspend_state_t pm_state)
+{
+ int error = acpi_suspend_begin(pm_state);
+
+ if (!error)
+ error = __acpi_pm_prepare();
+ return error;
+}
+
+/*
+ * The following callbacks are used if the pre-ACPI 2.0 suspend ordering has
+ * been requested.
+ */
+static struct platform_suspend_ops acpi_suspend_ops_old = {
+ .valid = acpi_suspend_state_valid,
+ .begin = acpi_suspend_begin_old,
+ .prepare = acpi_pm_disable_gpes,
+ .enter = acpi_suspend_enter,
+ .finish = acpi_pm_finish,
+ .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 int __init init_set_sci_en_on_resume(const struct dmi_system_id *d)
+{
+ set_sci_en_on_resume = 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)"),
+ },
+ },
+ {
+ .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"),
+ },
+ },
+ {
+ .callback = init_set_sci_en_on_resume,
+ .ident = "Apple MacBook 1,1",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "Apple Computer, Inc."),
+ DMI_MATCH(DMI_PRODUCT_NAME, "MacBook1,1"),
+ },
+ },
+ {
+ .callback = init_set_sci_en_on_resume,
+ .ident = "Apple MacMini 1,1",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "Apple Computer, Inc."),
+ DMI_MATCH(DMI_PRODUCT_NAME, "Macmini1,1"),
+ },
+ },
+ {},
+};
+#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)
+{
+ int error;
+
+ error = s4_no_nvs ? 0 : hibernate_nvs_alloc();
+ if (!error) {
+ acpi_target_sleep_state = ACPI_STATE_S4;
+ acpi_sleep_tts_switch(acpi_target_sleep_state);
+ }
+
+ return error;
+}
+
+static int acpi_hibernation_pre_snapshot(void)
+{
+ int error = acpi_pm_prepare();
+
+ if (!error)
+ hibernate_nvs_save();
+
+ return error;
+}
+
+static int acpi_hibernation_enter(void)
+{
+ acpi_status status = AE_OK;
+ unsigned long flags = 0;
+
+ ACPI_FLUSH_CPU_CACHE();
+
+ local_irq_save(flags);
+ acpi_enable_wakeup_device(ACPI_STATE_S4);
+ /* This shouldn't return. If it returns, we have a problem */
+ status = acpi_enter_sleep_state(ACPI_STATE_S4);
+ /* Reprogram control registers and execute _BFS */
+ acpi_leave_sleep_state_prep(ACPI_STATE_S4);
+ local_irq_restore(flags);
+
+ return ACPI_SUCCESS(status) ? 0 : -EFAULT;
+}
+
+static void acpi_hibernation_finish(void)
+{
+ hibernate_nvs_free();
+ acpi_pm_finish();
+}
+
+static void acpi_hibernation_leave(void)
+{
+ /*
+ * If ACPI is not enabled by the BIOS and the boot kernel, we need to
+ * enable it here.
+ */
+ 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");
+ }
+ /* Restore the NVS memory area */
+ hibernate_nvs_restore();
+}
+
+static void acpi_pm_enable_gpes(void)
+{
+ acpi_enable_all_runtime_gpes();
+}
+
+static struct platform_hibernation_ops acpi_hibernation_ops = {
+ .begin = acpi_hibernation_begin,
+ .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;
+}
--
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