eb9d0fe40e
* Introduce function acpi_pm_device_sleep_wake() for enabling and disabling the system wake-up capability of devices that are power manageable by ACPI. * Introduce function acpi_bus_can_wakeup() allowing other (dependent) subsystems to check if ACPI is able to enable the system wake-up capability of given device. * Introduce callback .sleep_wake() in struct pci_platform_pm_ops and for the ACPI PCI 'driver' make it use acpi_pm_device_sleep_wake(). * Introduce callback .can_wakeup() in struct pci_platform_pm_ops and for the ACPI 'driver' make it use acpi_bus_can_wakeup(). * Move the PME# handlig code out of pci_enable_wake() and split it into two functions, pci_pme_capable() and pci_pme_active(), allowing the caller to check if given device is capable of generating PME# from given power state and to enable/disable the device's PME# functionality, respectively. * Modify pci_enable_wake() to use the new ACPI callbacks and the new PME#-related functions. * Drop the generic .platform_enable_wakeup() callback that is not used any more. * Introduce device_set_wakeup_capable() that will set the power.can_wakeup flag of given device. * Rework PCI device PM initialization so that, if given device is capable of generating wake-up events, either natively through the PME# mechanism, or with the help of the platform, its power.can_wakeup flag is set and its power.should_wakeup flag is unset as appropriate. * Make ACPI set the power.can_wakeup flag for devices found to be wake-up capable by it. * Make the ACPI wake-up code enable/disable GPEs for devices that have the wakeup.flags.prepared flag set (which means that their wake-up power has been enabled). Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
173 lines
4.7 KiB
C
173 lines
4.7 KiB
C
/*
|
|
* 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, ACPI_ISR);
|
|
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, ACPI_NOT_ISR);
|
|
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_NOT_ISR);
|
|
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, ACPI_NOT_ISR);
|
|
dev->wakeup.state.enabled = 1;
|
|
spin_lock(&acpi_device_lock);
|
|
}
|
|
spin_unlock(&acpi_device_lock);
|
|
return 0;
|
|
}
|
|
|
|
late_initcall(acpi_wakeup_device_init);
|