PCI ACPI: Rework PCI handling of wake-up

[linux-2.6-omap-h63xx.git] / drivers / pci / pci-acpi.c

diff --git a/drivers/pci/pci-acpi.c b/drivers/pci/pci-acpi.c
index 5f96b869a5662eb077203e56270b335744b4fdc1..7764768b6a0e7dfc225c76693b3be997df4b926f 100644 (file)
--- a/drivers/pci/pci-acpi.c
+++ b/drivers/pci/pci-acpi.c
@@ -215,7 +215,6 @@ acpi_status pci_osc_control_set(acpi_handle handle, u32 flags)
 }
 EXPORT_SYMBOL(pci_osc_control_set);
 
-#ifdef CONFIG_ACPI_SLEEP
 /*
  * _SxD returns the D-state with the highest power
  * (lowest D-state number) supported in the S-state "x".
@@ -239,13 +238,11 @@ EXPORT_SYMBOL(pci_osc_control_set);
  *     choose highest power _SxD or any lower power
  */
 
-static pci_power_t acpi_pci_choose_state(struct pci_dev *pdev,
-       pm_message_t state)
+static pci_power_t acpi_pci_choose_state(struct pci_dev *pdev)
 {
        int acpi_state;
 
-       acpi_state = acpi_pm_device_sleep_state(&pdev->dev,
-               device_may_wakeup(&pdev->dev), NULL);
+       acpi_state = acpi_pm_device_sleep_state(&pdev->dev, NULL);
        if (acpi_state < 0)
                return PCI_POWER_ERROR;
 
@@ -261,7 +258,13 @@ static pci_power_t acpi_pci_choose_state(struct pci_dev *pdev,
        }
        return PCI_POWER_ERROR;
 }
-#endif
+
+static bool acpi_pci_power_manageable(struct pci_dev *dev)
+{
+       acpi_handle handle = DEVICE_ACPI_HANDLE(&dev->dev);
+
+       return handle ? acpi_bus_power_manageable(handle) : false;
+}
 
 static int acpi_pci_set_power_state(struct pci_dev *dev, pci_power_t state)
 {
@@ -274,12 +277,11 @@ static int acpi_pci_set_power_state(struct pci_dev *dev, pci_power_t state)
                [PCI_D3hot] = ACPI_STATE_D3,
                [PCI_D3cold] = ACPI_STATE_D3
        };
+       int error = -EINVAL;
 
-       if (!handle)
-               return -ENODEV;
        /* If the ACPI device has _EJ0, ignore the device */
-       if (ACPI_SUCCESS(acpi_get_handle(handle, "_EJ0", &tmp)))
-               return 0;
+       if (!handle || ACPI_SUCCESS(acpi_get_handle(handle, "_EJ0", &tmp)))
+               return -ENODEV;
 
        switch (state) {
        case PCI_D0:
@@ -287,11 +289,41 @@ static int acpi_pci_set_power_state(struct pci_dev *dev, pci_power_t state)
        case PCI_D2:
        case PCI_D3hot:
        case PCI_D3cold:
-               return acpi_bus_set_power(handle, state_conv[state]);
+               error = acpi_bus_set_power(handle, state_conv[state]);
        }
-       return -EINVAL;
+
+       if (!error)
+               dev_printk(KERN_INFO, &dev->dev,
+                               "power state changed by ACPI to D%d\n", state);
+
+       return error;
 }
 
+static bool acpi_pci_can_wakeup(struct pci_dev *dev)
+{
+       acpi_handle handle = DEVICE_ACPI_HANDLE(&dev->dev);
+
+       return handle ? acpi_bus_can_wakeup(handle) : false;
+}
+
+static int acpi_pci_sleep_wake(struct pci_dev *dev, bool enable)
+{
+       int error = acpi_pm_device_sleep_wake(&dev->dev, enable);
+
+       if (!error)
+               dev_printk(KERN_INFO, &dev->dev,
+                               "wake-up capability %s by ACPI\n",
+                               enable ? "enabled" : "disabled");
+       return error;
+}
+
+static struct pci_platform_pm_ops acpi_pci_platform_pm = {
+       .is_manageable = acpi_pci_power_manageable,
+       .set_state = acpi_pci_set_power_state,
+       .choose_state = acpi_pci_choose_state,
+       .can_wakeup = acpi_pci_can_wakeup,
+       .sleep_wake = acpi_pci_sleep_wake,
+};
 
 /* ACPI bus type */
 static int acpi_pci_find_device(struct device *dev, acpi_handle *handle)
@@ -343,10 +375,7 @@ static int __init acpi_pci_init(void)
        ret = register_acpi_bus_type(&acpi_pci_bus);
        if (ret)
                return 0;
-#ifdef CONFIG_ACPI_SLEEP
-       platform_pci_choose_state = acpi_pci_choose_state;
-#endif
-       platform_pci_set_power_state = acpi_pci_set_power_state;
+       pci_set_platform_pm(&acpi_pci_platform_pm);
        return 0;
 }
 arch_initcall(acpi_pci_init);