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-rw-r--r--drivers/acpi/sleep/Makefile5
-rw-r--r--drivers/acpi/sleep/main.c696
-rw-r--r--drivers/acpi/sleep/proc.c526
-rw-r--r--drivers/acpi/sleep/sleep.h7
-rw-r--r--drivers/acpi/sleep/wakeup.c173
5 files changed, 1407 insertions, 0 deletions
diff --git a/drivers/acpi/sleep/Makefile b/drivers/acpi/sleep/Makefile
new file mode 100644
index 0000000..f1fb888
--- /dev/null
+++ b/drivers/acpi/sleep/Makefile
@@ -0,0 +1,5 @@
+obj-y := wakeup.o
+obj-y += main.o
+obj-$(CONFIG_ACPI_SLEEP) += proc.o
+
+EXTRA_CFLAGS += $(ACPI_CFLAGS)
diff --git a/drivers/acpi/sleep/main.c b/drivers/acpi/sleep/main.c
new file mode 100644
index 0000000..28a691c
--- /dev/null
+++ b/drivers/acpi/sleep/main.c
@@ -0,0 +1,696 @@
+/*
+ * 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;
+
+/**
+ * acpi_pm_disable_gpes - Disable the GPEs.
+ */
+static int acpi_pm_disable_gpes(void)
+{
+ acpi_hw_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_hw_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_hw_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)
+{
+ acpi_target_sleep_state = ACPI_STATE_S4;
+ acpi_sleep_tts_switch(acpi_target_sleep_state);
+ return 0;
+}
+
+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_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");
+ }
+}
+
+static void acpi_pm_enable_gpes(void)
+{
+ acpi_hw_enable_all_runtime_gpes();
+}
+
+static struct platform_hibernation_ops acpi_hibernation_ops = {
+ .begin = acpi_hibernation_begin,
+ .end = acpi_pm_end,
+ .pre_snapshot = acpi_pm_prepare,
+ .finish = acpi_pm_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)
+ acpi_target_sleep_state = ACPI_STATE_S4;
+ 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_pm_disable_gpes,
+ .finish = acpi_pm_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_hw_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_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);
+ 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;
+}
diff --git a/drivers/acpi/sleep/proc.c b/drivers/acpi/sleep/proc.c
new file mode 100644
index 0000000..4dbc227
--- /dev/null
+++ b/drivers/acpi/sleep/proc.c
@@ -0,0 +1,526 @@
+#include <linux/proc_fs.h>
+#include <linux/seq_file.h>
+#include <linux/suspend.h>
+#include <linux/bcd.h>
+#include <asm/uaccess.h>
+
+#include <acpi/acpi_bus.h>
+#include <acpi/acpi_drivers.h>
+
+#ifdef CONFIG_X86
+#include <linux/mc146818rtc.h>
+#endif
+
+#include "sleep.h"
+
+#define _COMPONENT ACPI_SYSTEM_COMPONENT
+
+/*
+ * this file provides support for:
+ * /proc/acpi/sleep
+ * /proc/acpi/alarm
+ * /proc/acpi/wakeup
+ */
+
+ACPI_MODULE_NAME("sleep")
+#ifdef CONFIG_ACPI_PROCFS
+static int acpi_system_sleep_seq_show(struct seq_file *seq, void *offset)
+{
+ int i;
+
+ ACPI_FUNCTION_TRACE("acpi_system_sleep_seq_show");
+
+ for (i = 0; i <= ACPI_STATE_S5; i++) {
+ if (sleep_states[i]) {
+ seq_printf(seq, "S%d ", i);
+ }
+ }
+
+ seq_puts(seq, "\n");
+
+ return 0;
+}
+
+static int acpi_system_sleep_open_fs(struct inode *inode, struct file *file)
+{
+ return single_open(file, acpi_system_sleep_seq_show, PDE(inode)->data);
+}
+
+static ssize_t
+acpi_system_write_sleep(struct file *file,
+ const char __user * buffer, size_t count, loff_t * ppos)
+{
+ char str[12];
+ u32 state = 0;
+ int error = 0;
+
+ if (count > sizeof(str) - 1)
+ goto Done;
+ memset(str, 0, sizeof(str));
+ if (copy_from_user(str, buffer, count))
+ return -EFAULT;
+
+ /* Check for S4 bios request */
+ if (!strcmp(str, "4b")) {
+ error = acpi_suspend(4);
+ goto Done;
+ }
+ state = simple_strtoul(str, NULL, 0);
+#ifdef CONFIG_HIBERNATION
+ if (state == 4) {
+ error = hibernate();
+ goto Done;
+ }
+#endif
+ error = acpi_suspend(state);
+ Done:
+ return error ? error : count;
+}
+#endif /* CONFIG_ACPI_PROCFS */
+
+#if defined(CONFIG_RTC_DRV_CMOS) || defined(CONFIG_RTC_DRV_CMOS_MODULE) || !defined(CONFIG_X86)
+/* use /sys/class/rtc/rtcX/wakealarm instead; it's not ACPI-specific */
+#else
+#define HAVE_ACPI_LEGACY_ALARM
+#endif
+
+#ifdef HAVE_ACPI_LEGACY_ALARM
+
+static int acpi_system_alarm_seq_show(struct seq_file *seq, void *offset)
+{
+ u32 sec, min, hr;
+ u32 day, mo, yr, cent = 0;
+ unsigned char rtc_control = 0;
+ unsigned long flags;
+
+ ACPI_FUNCTION_TRACE("acpi_system_alarm_seq_show");
+
+ spin_lock_irqsave(&rtc_lock, flags);
+
+ sec = CMOS_READ(RTC_SECONDS_ALARM);
+ min = CMOS_READ(RTC_MINUTES_ALARM);
+ hr = CMOS_READ(RTC_HOURS_ALARM);
+ rtc_control = CMOS_READ(RTC_CONTROL);
+
+ /* If we ever get an FACP with proper values... */
+ if (acpi_gbl_FADT.day_alarm)
+ /* ACPI spec: only low 6 its should be cared */
+ day = CMOS_READ(acpi_gbl_FADT.day_alarm) & 0x3F;
+ else
+ day = CMOS_READ(RTC_DAY_OF_MONTH);
+ if (acpi_gbl_FADT.month_alarm)
+ mo = CMOS_READ(acpi_gbl_FADT.month_alarm);
+ else
+ mo = CMOS_READ(RTC_MONTH);
+ if (acpi_gbl_FADT.century)
+ cent = CMOS_READ(acpi_gbl_FADT.century);
+
+ yr = CMOS_READ(RTC_YEAR);
+
+ spin_unlock_irqrestore(&rtc_lock, flags);
+
+ if (!(rtc_control & RTC_DM_BINARY) || RTC_ALWAYS_BCD) {
+ sec = bcd2bin(sec);
+ min = bcd2bin(min);
+ hr = bcd2bin(hr);
+ day = bcd2bin(day);
+ mo = bcd2bin(mo);
+ yr = bcd2bin(yr);
+ cent = bcd2bin(cent);
+ }
+
+ /* we're trusting the FADT (see above) */
+ if (!acpi_gbl_FADT.century)
+ /* If we're not trusting the FADT, we should at least make it
+ * right for _this_ century... ehm, what is _this_ century?
+ *
+ * TBD:
+ * ASAP: find piece of code in the kernel, e.g. star tracker driver,
+ * which we can trust to determine the century correctly. Atom
+ * watch driver would be nice, too...
+ *
+ * if that has not happened, change for first release in 2050:
+ * if (yr<50)
+ * yr += 2100;
+ * else
+ * yr += 2000; // current line of code
+ *
+ * if that has not happened either, please do on 2099/12/31:23:59:59
+ * s/2000/2100
+ *
+ */
+ yr += 2000;
+ else
+ yr += cent * 100;
+
+ seq_printf(seq, "%4.4u-", yr);
+ (mo > 12) ? seq_puts(seq, "**-") : seq_printf(seq, "%2.2u-", mo);
+ (day > 31) ? seq_puts(seq, "** ") : seq_printf(seq, "%2.2u ", day);
+ (hr > 23) ? seq_puts(seq, "**:") : seq_printf(seq, "%2.2u:", hr);
+ (min > 59) ? seq_puts(seq, "**:") : seq_printf(seq, "%2.2u:", min);
+ (sec > 59) ? seq_puts(seq, "**\n") : seq_printf(seq, "%2.2u\n", sec);
+
+ return 0;
+}
+
+static int acpi_system_alarm_open_fs(struct inode *inode, struct file *file)
+{
+ return single_open(file, acpi_system_alarm_seq_show, PDE(inode)->data);
+}
+
+static int get_date_field(char **p, u32 * value)
+{
+ char *next = NULL;
+ char *string_end = NULL;
+ int result = -EINVAL;
+
+ /*
+ * Try to find delimeter, only to insert null. The end of the
+ * string won't have one, but is still valid.
+ */
+ if (*p == NULL)
+ return result;
+
+ next = strpbrk(*p, "- :");
+ if (next)
+ *next++ = '\0';
+
+ *value = simple_strtoul(*p, &string_end, 10);
+
+ /* Signal success if we got a good digit */
+ if (string_end != *p)
+ result = 0;
+
+ if (next)
+ *p = next;
+ else
+ *p = NULL;
+
+ return result;
+}
+
+/* Read a possibly BCD register, always return binary */
+static u32 cmos_bcd_read(int offset, int rtc_control)
+{
+ u32 val = CMOS_READ(offset);
+ if (!(rtc_control & RTC_DM_BINARY) || RTC_ALWAYS_BCD)
+ val = bcd2bin(val);
+ return val;
+}
+
+/* Write binary value into possibly BCD register */
+static void cmos_bcd_write(u32 val, int offset, int rtc_control)
+{
+ if (!(rtc_control & RTC_DM_BINARY) || RTC_ALWAYS_BCD)
+ val = bin2bcd(val);
+ CMOS_WRITE(val, offset);
+}
+
+static ssize_t
+acpi_system_write_alarm(struct file *file,
+ const char __user * buffer, size_t count, loff_t * ppos)
+{
+ int result = 0;
+ char alarm_string[30] = { '\0' };
+ char *p = alarm_string;
+ u32 sec, min, hr, day, mo, yr;
+ int adjust = 0;
+ unsigned char rtc_control = 0;
+
+ ACPI_FUNCTION_TRACE("acpi_system_write_alarm");
+
+ if (count > sizeof(alarm_string) - 1)
+ return_VALUE(-EINVAL);
+
+ if (copy_from_user(alarm_string, buffer, count))
+ return_VALUE(-EFAULT);
+
+ alarm_string[count] = '\0';
+
+ /* check for time adjustment */
+ if (alarm_string[0] == '+') {
+ p++;
+ adjust = 1;
+ }
+
+ if ((result = get_date_field(&p, &yr)))
+ goto end;
+ if ((result = get_date_field(&p, &mo)))
+ goto end;
+ if ((result = get_date_field(&p, &day)))
+ goto end;
+ if ((result = get_date_field(&p, &hr)))
+ goto end;
+ if ((result = get_date_field(&p, &min)))
+ goto end;
+ if ((result = get_date_field(&p, &sec)))
+ goto end;
+
+ spin_lock_irq(&rtc_lock);
+
+ rtc_control = CMOS_READ(RTC_CONTROL);
+
+ if (adjust) {
+ yr += cmos_bcd_read(RTC_YEAR, rtc_control);
+ mo += cmos_bcd_read(RTC_MONTH, rtc_control);
+ day += cmos_bcd_read(RTC_DAY_OF_MONTH, rtc_control);
+ hr += cmos_bcd_read(RTC_HOURS, rtc_control);
+ min += cmos_bcd_read(RTC_MINUTES, rtc_control);
+ sec += cmos_bcd_read(RTC_SECONDS, rtc_control);
+ }
+
+ spin_unlock_irq(&rtc_lock);
+
+ if (sec > 59) {
+ min += sec/60;
+ sec = sec%60;
+ }
+ if (min > 59) {
+ hr += min/60;
+ min = min%60;
+ }
+ if (hr > 23) {
+ day += hr/24;
+ hr = hr%24;
+ }
+ if (day > 31) {
+ mo += day/32;
+ day = day%32;
+ }
+ if (mo > 12) {
+ yr += mo/13;
+ mo = mo%13;
+ }
+
+ spin_lock_irq(&rtc_lock);
+ /*
+ * Disable alarm interrupt before setting alarm timer or else
+ * when ACPI_EVENT_RTC is enabled, a spurious ACPI interrupt occurs
+ */
+ rtc_control &= ~RTC_AIE;
+ CMOS_WRITE(rtc_control, RTC_CONTROL);
+ CMOS_READ(RTC_INTR_FLAGS);
+
+ /* write the fields the rtc knows about */
+ cmos_bcd_write(hr, RTC_HOURS_ALARM, rtc_control);
+ cmos_bcd_write(min, RTC_MINUTES_ALARM, rtc_control);
+ cmos_bcd_write(sec, RTC_SECONDS_ALARM, rtc_control);
+
+ /*
+ * If the system supports an enhanced alarm it will have non-zero
+ * offsets into the CMOS RAM here -- which for some reason are pointing
+ * to the RTC area of memory.
+ */
+ if (acpi_gbl_FADT.day_alarm)
+ cmos_bcd_write(day, acpi_gbl_FADT.day_alarm, rtc_control);
+ if (acpi_gbl_FADT.month_alarm)
+ cmos_bcd_write(mo, acpi_gbl_FADT.month_alarm, rtc_control);
+ if (acpi_gbl_FADT.century) {
+ if (adjust)
+ yr += cmos_bcd_read(acpi_gbl_FADT.century, rtc_control) * 100;
+ cmos_bcd_write(yr / 100, acpi_gbl_FADT.century, rtc_control);
+ }
+ /* enable the rtc alarm interrupt */
+ rtc_control |= RTC_AIE;
+ CMOS_WRITE(rtc_control, RTC_CONTROL);
+ CMOS_READ(RTC_INTR_FLAGS);
+
+ spin_unlock_irq(&rtc_lock);
+
+ acpi_clear_event(ACPI_EVENT_RTC);
+ acpi_enable_event(ACPI_EVENT_RTC, 0);
+
+ *ppos += count;
+
+ result = 0;
+ end:
+ return_VALUE(result ? result : count);
+}
+#endif /* HAVE_ACPI_LEGACY_ALARM */
+
+extern struct list_head acpi_wakeup_device_list;
+extern spinlock_t acpi_device_lock;
+
+static int
+acpi_system_wakeup_device_seq_show(struct seq_file *seq, void *offset)
+{
+ struct list_head *node, *next;
+
+ seq_printf(seq, "Device\tS-state\t Status Sysfs node\n");
+
+ spin_lock(&acpi_device_lock);
+ list_for_each_safe(node, next, &acpi_wakeup_device_list) {
+ struct acpi_device *dev =
+ container_of(node, struct acpi_device, wakeup_list);
+ struct device *ldev;
+
+ if (!dev->wakeup.flags.valid)
+ continue;
+ spin_unlock(&acpi_device_lock);
+
+ ldev = acpi_get_physical_device(dev->handle);
+ seq_printf(seq, "%s\t S%d\t%c%-8s ",
+ dev->pnp.bus_id,
+ (u32) dev->wakeup.sleep_state,
+ dev->wakeup.flags.run_wake ? '*' : ' ',
+ dev->wakeup.state.enabled ? "enabled" : "disabled");
+ if (ldev)
+ seq_printf(seq, "%s:%s",
+ ldev->bus ? ldev->bus->name : "no-bus",
+ dev_name(ldev));
+ seq_printf(seq, "\n");
+ put_device(ldev);
+
+ spin_lock(&acpi_device_lock);
+ }
+ spin_unlock(&acpi_device_lock);
+ return 0;
+}
+
+static void physical_device_enable_wakeup(struct acpi_device *adev)
+{
+ struct device *dev = acpi_get_physical_device(adev->handle);
+
+ if (dev && device_can_wakeup(dev))
+ device_set_wakeup_enable(dev, adev->wakeup.state.enabled);
+}
+
+static ssize_t
+acpi_system_write_wakeup_device(struct file *file,
+ const char __user * buffer,
+ size_t count, loff_t * ppos)
+{
+ struct list_head *node, *next;
+ char strbuf[5];
+ char str[5] = "";
+ int len = count;
+ struct acpi_device *found_dev = NULL;
+
+ if (len > 4)
+ len = 4;
+
+ if (copy_from_user(strbuf, buffer, len))
+ return -EFAULT;
+ strbuf[len] = '\0';
+ sscanf(strbuf, "%s", str);
+
+ spin_lock(&acpi_device_lock);
+ list_for_each_safe(node, next, &acpi_wakeup_device_list) {
+ struct acpi_device *dev =
+ container_of(node, struct acpi_device, wakeup_list);
+ if (!dev->wakeup.flags.valid)
+ continue;
+
+ if (!strncmp(dev->pnp.bus_id, str, 4)) {
+ dev->wakeup.state.enabled =
+ dev->wakeup.state.enabled ? 0 : 1;
+ found_dev = dev;
+ break;
+ }
+ }
+ if (found_dev) {
+ physical_device_enable_wakeup(found_dev);
+ list_for_each_safe(node, next, &acpi_wakeup_device_list) {
+ struct acpi_device *dev = container_of(node,
+ struct
+ acpi_device,
+ wakeup_list);
+
+ if ((dev != found_dev) &&
+ (dev->wakeup.gpe_number ==
+ found_dev->wakeup.gpe_number)
+ && (dev->wakeup.gpe_device ==
+ found_dev->wakeup.gpe_device)) {
+ printk(KERN_WARNING
+ "ACPI: '%s' and '%s' have the same GPE, "
+ "can't disable/enable one seperately\n",
+ dev->pnp.bus_id, found_dev->pnp.bus_id);
+ dev->wakeup.state.enabled =
+ found_dev->wakeup.state.enabled;
+ physical_device_enable_wakeup(dev);
+ }
+ }
+ }
+ spin_unlock(&acpi_device_lock);
+ return count;
+}
+
+static int
+acpi_system_wakeup_device_open_fs(struct inode *inode, struct file *file)
+{
+ return single_open(file, acpi_system_wakeup_device_seq_show,
+ PDE(inode)->data);
+}
+
+static const struct file_operations acpi_system_wakeup_device_fops = {
+ .owner = THIS_MODULE,
+ .open = acpi_system_wakeup_device_open_fs,
+ .read = seq_read,
+ .write = acpi_system_write_wakeup_device,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+#ifdef CONFIG_ACPI_PROCFS
+static const struct file_operations acpi_system_sleep_fops = {
+ .owner = THIS_MODULE,
+ .open = acpi_system_sleep_open_fs,
+ .read = seq_read,
+ .write = acpi_system_write_sleep,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+#endif /* CONFIG_ACPI_PROCFS */
+
+#ifdef HAVE_ACPI_LEGACY_ALARM
+static const struct file_operations acpi_system_alarm_fops = {
+ .owner = THIS_MODULE,
+ .open = acpi_system_alarm_open_fs,
+ .read = seq_read,
+ .write = acpi_system_write_alarm,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+static u32 rtc_handler(void *context)
+{
+ acpi_clear_event(ACPI_EVENT_RTC);
+ acpi_disable_event(ACPI_EVENT_RTC, 0);
+
+ return ACPI_INTERRUPT_HANDLED;
+}
+#endif /* HAVE_ACPI_LEGACY_ALARM */
+
+static int __init acpi_sleep_proc_init(void)
+{
+ if (acpi_disabled)
+ return 0;
+
+#ifdef CONFIG_ACPI_PROCFS
+ /* 'sleep' [R/W] */
+ proc_create("sleep", S_IFREG | S_IRUGO | S_IWUSR,
+ acpi_root_dir, &acpi_system_sleep_fops);
+#endif /* CONFIG_ACPI_PROCFS */
+
+#ifdef HAVE_ACPI_LEGACY_ALARM
+ /* 'alarm' [R/W] */
+ proc_create("alarm", S_IFREG | S_IRUGO | S_IWUSR,
+ acpi_root_dir, &acpi_system_alarm_fops);
+
+ acpi_install_fixed_event_handler(ACPI_EVENT_RTC, rtc_handler, NULL);
+ /*
+ * Disable the RTC event after installing RTC handler.
+ * Only when RTC alarm is set will it be enabled.
+ */
+ acpi_clear_event(ACPI_EVENT_RTC);
+ acpi_disable_event(ACPI_EVENT_RTC, 0);
+#endif /* HAVE_ACPI_LEGACY_ALARM */
+
+ /* 'wakeup device' [R/W] */
+ proc_create("wakeup", S_IFREG | S_IRUGO | S_IWUSR,
+ acpi_root_dir, &acpi_system_wakeup_device_fops);
+
+ return 0;
+}
+
+late_initcall(acpi_sleep_proc_init);
diff --git a/drivers/acpi/sleep/sleep.h b/drivers/acpi/sleep/sleep.h
new file mode 100644
index 0000000..cfaf8f5
--- /dev/null
+++ b/drivers/acpi/sleep/sleep.h
@@ -0,0 +1,7 @@
+
+extern u8 sleep_states[];
+extern int acpi_suspend (u32 state);
+
+extern void acpi_enable_wakeup_device_prep(u8 sleep_state);
+extern void acpi_enable_wakeup_device(u8 sleep_state);
+extern void acpi_disable_wakeup_device(u8 sleep_state);
diff --git a/drivers/acpi/sleep/wakeup.c b/drivers/acpi/sleep/wakeup.c
new file mode 100644
index 0000000..dea4c23
--- /dev/null
+++ b/drivers/acpi/sleep/wakeup.c
@@ -0,0 +1,173 @@
+/*
+ * wakeup.c - support wakeup devices
+ * Copyright (C) 2004 Li Shaohua <shaohua.li@intel.com>
+ */
+
+#include <linux/init.h>
+#include <linux/acpi.h>
+#include <acpi/acpi_drivers.h>
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <acpi/acevents.h>
+#include "sleep.h"
+
+#define _COMPONENT ACPI_SYSTEM_COMPONENT
+ACPI_MODULE_NAME("wakeup_devices")
+
+extern struct list_head acpi_wakeup_device_list;
+extern spinlock_t acpi_device_lock;
+
+/**
+ * acpi_enable_wakeup_device_prep - prepare wakeup devices
+ * @sleep_state: ACPI state
+ * Enable all wakup devices power if the devices' wakeup level
+ * is higher than requested sleep level
+ */
+
+void acpi_enable_wakeup_device_prep(u8 sleep_state)
+{
+ struct list_head *node, *next;
+
+ ACPI_FUNCTION_TRACE("acpi_enable_wakeup_device_prep");
+
+ spin_lock(&acpi_device_lock);
+ list_for_each_safe(node, next, &acpi_wakeup_device_list) {
+ struct acpi_device *dev = container_of(node,
+ struct acpi_device,
+ wakeup_list);
+
+ if (!dev->wakeup.flags.valid ||
+ !dev->wakeup.state.enabled ||
+ (sleep_state > (u32) dev->wakeup.sleep_state))
+ continue;
+
+ spin_unlock(&acpi_device_lock);
+ acpi_enable_wakeup_device_power(dev, sleep_state);
+ spin_lock(&acpi_device_lock);
+ }
+ spin_unlock(&acpi_device_lock);
+}
+
+/**
+ * acpi_enable_wakeup_device - enable wakeup devices
+ * @sleep_state: ACPI state
+ * Enable all wakup devices's GPE
+ */
+void acpi_enable_wakeup_device(u8 sleep_state)
+{
+ struct list_head *node, *next;
+
+ /*
+ * Caution: this routine must be invoked when interrupt is disabled
+ * Refer ACPI2.0: P212
+ */
+ ACPI_FUNCTION_TRACE("acpi_enable_wakeup_device");
+ spin_lock(&acpi_device_lock);
+ list_for_each_safe(node, next, &acpi_wakeup_device_list) {
+ struct acpi_device *dev =
+ container_of(node, struct acpi_device, wakeup_list);
+
+ if (!dev->wakeup.flags.valid)
+ continue;
+
+ /* If users want to disable run-wake GPE,
+ * we only disable it for wake and leave it for runtime
+ */
+ if ((!dev->wakeup.state.enabled && !dev->wakeup.flags.prepared)
+ || sleep_state > (u32) dev->wakeup.sleep_state) {
+ if (dev->wakeup.flags.run_wake) {
+ spin_unlock(&acpi_device_lock);
+ /* set_gpe_type will disable GPE, leave it like that */
+ acpi_set_gpe_type(dev->wakeup.gpe_device,
+ dev->wakeup.gpe_number,
+ ACPI_GPE_TYPE_RUNTIME);
+ spin_lock(&acpi_device_lock);
+ }
+ continue;
+ }
+ spin_unlock(&acpi_device_lock);
+ if (!dev->wakeup.flags.run_wake)
+ acpi_enable_gpe(dev->wakeup.gpe_device,
+ dev->wakeup.gpe_number);
+ spin_lock(&acpi_device_lock);
+ }
+ spin_unlock(&acpi_device_lock);
+}
+
+/**
+ * acpi_disable_wakeup_device - disable devices' wakeup capability
+ * @sleep_state: ACPI state
+ * Disable all wakup devices's GPE and wakeup capability
+ */
+void acpi_disable_wakeup_device(u8 sleep_state)
+{
+ struct list_head *node, *next;
+
+ ACPI_FUNCTION_TRACE("acpi_disable_wakeup_device");
+
+ spin_lock(&acpi_device_lock);
+ list_for_each_safe(node, next, &acpi_wakeup_device_list) {
+ struct acpi_device *dev =
+ container_of(node, struct acpi_device, wakeup_list);
+
+ if (!dev->wakeup.flags.valid)
+ continue;
+
+ if ((!dev->wakeup.state.enabled && !dev->wakeup.flags.prepared)
+ || sleep_state > (u32) dev->wakeup.sleep_state) {
+ if (dev->wakeup.flags.run_wake) {
+ spin_unlock(&acpi_device_lock);
+ acpi_set_gpe_type(dev->wakeup.gpe_device,
+ dev->wakeup.gpe_number,
+ ACPI_GPE_TYPE_WAKE_RUN);
+ /* Re-enable it, since set_gpe_type will disable it */
+ acpi_enable_gpe(dev->wakeup.gpe_device,
+ dev->wakeup.gpe_number);
+ spin_lock(&acpi_device_lock);
+ }
+ continue;
+ }
+
+ spin_unlock(&acpi_device_lock);
+ acpi_disable_wakeup_device_power(dev);
+ /* Never disable run-wake GPE */
+ if (!dev->wakeup.flags.run_wake) {
+ acpi_disable_gpe(dev->wakeup.gpe_device,
+ dev->wakeup.gpe_number);
+ acpi_clear_gpe(dev->wakeup.gpe_device,
+ dev->wakeup.gpe_number, ACPI_NOT_ISR);
+ }
+ spin_lock(&acpi_device_lock);
+ }
+ spin_unlock(&acpi_device_lock);
+}
+
+static int __init acpi_wakeup_device_init(void)
+{
+ struct list_head *node, *next;
+
+ if (acpi_disabled)
+ return 0;
+
+ spin_lock(&acpi_device_lock);
+ list_for_each_safe(node, next, &acpi_wakeup_device_list) {
+ struct acpi_device *dev = container_of(node,
+ struct acpi_device,
+ wakeup_list);
+ /* In case user doesn't load button driver */
+ if (!dev->wakeup.flags.run_wake || dev->wakeup.state.enabled)
+ continue;
+ spin_unlock(&acpi_device_lock);
+ acpi_set_gpe_type(dev->wakeup.gpe_device,
+ dev->wakeup.gpe_number,
+ ACPI_GPE_TYPE_WAKE_RUN);
+ acpi_enable_gpe(dev->wakeup.gpe_device,
+ dev->wakeup.gpe_number);
+ dev->wakeup.state.enabled = 1;
+ spin_lock(&acpi_device_lock);
+ }
+ spin_unlock(&acpi_device_lock);
+ return 0;
+}
+
+late_initcall(acpi_wakeup_device_init);
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