summaryrefslogtreecommitdiffstats
path: root/drivers/pci/pci.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/pci/pci.c')
-rw-r--r--drivers/pci/pci.c68
1 files changed, 37 insertions, 31 deletions
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index 563901cd9c06..0b5302a9fdae 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -574,8 +574,7 @@ static const struct pci_platform_pm_ops *pci_platform_pm;
int pci_set_platform_pm(const struct pci_platform_pm_ops *ops)
{
if (!ops->is_manageable || !ops->set_state || !ops->get_state ||
- !ops->choose_state || !ops->sleep_wake || !ops->run_wake ||
- !ops->need_resume)
+ !ops->choose_state || !ops->set_wakeup || !ops->need_resume)
return -EINVAL;
pci_platform_pm = ops;
return 0;
@@ -603,16 +602,10 @@ static inline pci_power_t platform_pci_choose_state(struct pci_dev *dev)
pci_platform_pm->choose_state(dev) : PCI_POWER_ERROR;
}
-static inline int platform_pci_sleep_wake(struct pci_dev *dev, bool enable)
+static inline int platform_pci_set_wakeup(struct pci_dev *dev, bool enable)
{
return pci_platform_pm ?
- pci_platform_pm->sleep_wake(dev, enable) : -ENODEV;
-}
-
-static inline int platform_pci_run_wake(struct pci_dev *dev, bool enable)
-{
- return pci_platform_pm ?
- pci_platform_pm->run_wake(dev, enable) : -ENODEV;
+ pci_platform_pm->set_wakeup(dev, enable) : -ENODEV;
}
static inline bool platform_pci_need_resume(struct pci_dev *dev)
@@ -1805,6 +1798,23 @@ static void __pci_pme_active(struct pci_dev *dev, bool enable)
pci_write_config_word(dev, dev->pm_cap + PCI_PM_CTRL, pmcsr);
}
+static void pci_pme_restore(struct pci_dev *dev)
+{
+ u16 pmcsr;
+
+ if (!dev->pme_support)
+ return;
+
+ pci_read_config_word(dev, dev->pm_cap + PCI_PM_CTRL, &pmcsr);
+ if (dev->wakeup_prepared) {
+ pmcsr |= PCI_PM_CTRL_PME_ENABLE;
+ } else {
+ pmcsr &= ~PCI_PM_CTRL_PME_ENABLE;
+ pmcsr |= PCI_PM_CTRL_PME_STATUS;
+ }
+ pci_write_config_word(dev, dev->pm_cap + PCI_PM_CTRL, pmcsr);
+}
+
/**
* pci_pme_active - enable or disable PCI device's PME# function
* @dev: PCI device to handle.
@@ -1872,10 +1882,9 @@ void pci_pme_active(struct pci_dev *dev, bool enable)
EXPORT_SYMBOL(pci_pme_active);
/**
- * __pci_enable_wake - enable PCI device as wakeup event source
+ * pci_enable_wake - enable PCI device as wakeup event source
* @dev: PCI device affected
* @state: PCI state from which device will issue wakeup events
- * @runtime: True if the events are to be generated at run time
* @enable: True to enable event generation; false to disable
*
* This enables the device as a wakeup event source, or disables it.
@@ -1891,17 +1900,18 @@ EXPORT_SYMBOL(pci_pme_active);
* Error code depending on the platform is returned if both the platform and
* the native mechanism fail to enable the generation of wake-up events
*/
-int __pci_enable_wake(struct pci_dev *dev, pci_power_t state,
- bool runtime, bool enable)
+int pci_enable_wake(struct pci_dev *dev, pci_power_t state, bool enable)
{
int ret = 0;
- if (enable && !runtime && !device_may_wakeup(&dev->dev))
- return -EINVAL;
-
- /* Don't do the same thing twice in a row for one device. */
- if (!!enable == !!dev->wakeup_prepared)
+ /*
+ * Don't do the same thing twice in a row for one device, but restore
+ * PME Enable in case it has been updated by config space restoration.
+ */
+ if (!!enable == !!dev->wakeup_prepared) {
+ pci_pme_restore(dev);
return 0;
+ }
/*
* According to "PCI System Architecture" 4th ed. by Tom Shanley & Don
@@ -1916,24 +1926,20 @@ int __pci_enable_wake(struct pci_dev *dev, pci_power_t state,
pci_pme_active(dev, true);
else
ret = 1;
- error = runtime ? platform_pci_run_wake(dev, true) :
- platform_pci_sleep_wake(dev, true);
+ error = platform_pci_set_wakeup(dev, true);
if (ret)
ret = error;
if (!ret)
dev->wakeup_prepared = true;
} else {
- if (runtime)
- platform_pci_run_wake(dev, false);
- else
- platform_pci_sleep_wake(dev, false);
+ platform_pci_set_wakeup(dev, false);
pci_pme_active(dev, false);
dev->wakeup_prepared = false;
}
return ret;
}
-EXPORT_SYMBOL(__pci_enable_wake);
+EXPORT_SYMBOL(pci_enable_wake);
/**
* pci_wake_from_d3 - enable/disable device to wake up from D3_hot or D3_cold
@@ -2075,12 +2081,12 @@ int pci_finish_runtime_suspend(struct pci_dev *dev)
dev->runtime_d3cold = target_state == PCI_D3cold;
- __pci_enable_wake(dev, target_state, true, pci_dev_run_wake(dev));
+ pci_enable_wake(dev, target_state, pci_dev_run_wake(dev));
error = pci_set_power_state(dev, target_state);
if (error) {
- __pci_enable_wake(dev, target_state, true, false);
+ pci_enable_wake(dev, target_state, false);
dev->runtime_d3cold = false;
}
@@ -2099,7 +2105,7 @@ bool pci_dev_run_wake(struct pci_dev *dev)
{
struct pci_bus *bus = dev->bus;
- if (device_run_wake(&dev->dev))
+ if (device_can_wakeup(&dev->dev))
return true;
if (!dev->pme_support)
@@ -2112,7 +2118,7 @@ bool pci_dev_run_wake(struct pci_dev *dev)
while (bus->parent) {
struct pci_dev *bridge = bus->self;
- if (device_run_wake(&bridge->dev))
+ if (device_can_wakeup(&bridge->dev))
return true;
bus = bus->parent;
@@ -2120,7 +2126,7 @@ bool pci_dev_run_wake(struct pci_dev *dev)
/* We have reached the root bus. */
if (bus->bridge)
- return device_run_wake(bus->bridge);
+ return device_can_wakeup(bus->bridge);
return false;
}