#include "internal.h"
#include "sleep.h"
+/*
+ * We didn't lock acpi_device_lock in the file, because it invokes oops in
+ * suspend/resume and isn't really required as this is called in S-state. At
+ * that time, there is no device hotplug
+ **/
#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
+ * acpi_enable_wakeup_device_prep - Prepare wake-up devices.
+ * @sleep_state: ACPI system sleep state.
+ *
+ * Enable all wake-up devices' power, unless the requested system sleep state is
+ * too deep.
*/
-
void acpi_enable_wakeup_device_prep(u8 sleep_state)
{
struct list_head *node, *next;
- 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))
+ 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
+ * acpi_enable_wakeup_device - Enable wake-up device GPEs.
+ * @sleep_state: ACPI system sleep state.
+ *
+ * Enable all wake-up devices' GPEs, with the assumption that
+ * acpi_disable_all_gpes() was executed before, so we don't need to disable any
+ * GPEs here.
*/
void acpi_enable_wakeup_device(u8 sleep_state)
{
* Caution: this routine must be invoked when interrupt is disabled
* Refer ACPI2.0: P212
*/
- 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);
- }
+ if ((!dev->wakeup.state.enabled && !dev->wakeup.prepare_count)
+ || sleep_state > (u32) dev->wakeup.sleep_state)
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);
+
+ /* The wake-up power should have been enabled already. */
+ acpi_set_gpe(dev->wakeup.gpe_device, dev->wakeup.gpe_number,
+ ACPI_GPE_ENABLE);
}
- 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
+ * acpi_disable_wakeup_device - Disable devices' wakeup capability.
+ * @sleep_state: ACPI system sleep state.
+ *
+ * This function only affects devices with wakeup.state.enabled set, which means
+ * that it reverses the changes made by acpi_enable_wakeup_device_prep().
*/
void acpi_disable_wakeup_device(u8 sleep_state)
{
struct list_head *node, *next;
- 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);
- }
+ if (!dev->wakeup.flags.valid || !dev->wakeup.state.enabled
+ || (sleep_state > (u32) dev->wakeup.sleep_state))
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);
}
int __init acpi_wakeup_device_init(void)
{
struct list_head *node, *next;
- spin_lock(&acpi_device_lock);
+ mutex_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)
+ if (!dev->wakeup.flags.always_enabled ||
+ 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);
+ acpi_enable_gpe(dev->wakeup.gpe_device, dev->wakeup.gpe_number,
+ ACPI_GPE_TYPE_WAKE);
dev->wakeup.state.enabled = 1;
- spin_lock(&acpi_device_lock);
}
- spin_unlock(&acpi_device_lock);
+ mutex_unlock(&acpi_device_lock);
return 0;
}
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff