/**
* usb_acpi_power_manageable - check whether usb port has
* acpi power resource.
* @hdev: USB device belonging to the usb hub
* @index: port index based zero
*
* Return true if the port has acpi power resource and false if no.
*/
bool usb_acpi_power_manageable(struct usb_device *hdev, int index)
{
acpi_handle port_handle;
int port1 = index + 1;
port_handle = usb_get_hub_port_acpi_handle(hdev,
port1);
if (port_handle)
return acpi_bus_power_manageable(port_handle);
else
return false;
}
static int pnpacpi_disable_resources(struct pnp_dev *dev)
{
acpi_handle handle = dev->data;
int ret;
dev_dbg(&dev->dev, "disable resources\n");
/* acpi_unregister_gsi(pnp_irq(dev, 0)); */
ret = 0;
if (acpi_bus_power_manageable(handle)) {
ret = acpi_bus_set_power(handle, ACPI_STATE_D3);
if (ret)
return ret;
}
if (ACPI_FAILURE(acpi_evaluate_object(handle, "_DIS", NULL, NULL)))
ret = -ENODEV;
return ret;
}
static int pnpacpi_set_resources(struct pnp_dev *dev)
{
acpi_handle handle = dev->data;
struct acpi_buffer buffer;
int ret;
pnp_dbg(&dev->dev, "set resources\n");
ret = pnpacpi_build_resource_template(dev, &buffer);
if (ret)
return ret;
ret = pnpacpi_encode_resources(dev, &buffer);
if (ret) {
kfree(buffer.pointer);
return ret;
}
if (ACPI_FAILURE(acpi_set_current_resources(handle, &buffer)))
ret = -EINVAL;
else if (acpi_bus_power_manageable(handle))
ret = acpi_bus_set_power(handle, ACPI_STATE_D0);
kfree(buffer.pointer);
return ret;
}
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;
}
NTSTATUS
Bus_PDO_Power (
PPDO_DEVICE_DATA PdoData,
PIRP Irp
)
{
NTSTATUS status;
PIO_STACK_LOCATION stack;
POWER_STATE powerState;
POWER_STATE_TYPE powerType;
ULONG error;
stack = IoGetCurrentIrpStackLocation (Irp);
powerType = stack->Parameters.Power.Type;
powerState = stack->Parameters.Power.State;
switch (stack->MinorFunction) {
case IRP_MN_SET_POWER:
DPRINT("\tSetting %s power state to %s\n",
((powerType == SystemPowerState) ? "System" : "Device"),
((powerType == SystemPowerState) ? \
DbgSystemPowerString(powerState.SystemState) : \
DbgDevicePowerString(powerState.DeviceState)));
switch (powerType) {
case DevicePowerState:
if (!PdoData->AcpiHandle || !acpi_bus_power_manageable(PdoData->AcpiHandle))
{
PoSetPowerState(PdoData->Common.Self, DevicePowerState, powerState);
PdoData->Common.DevicePowerState = powerState.DeviceState;
status = STATUS_SUCCESS;
break;
}
switch (powerState.DeviceState)
{
case PowerDeviceD0:
error = acpi_bus_set_power(PdoData->AcpiHandle, ACPI_STATE_D0);
break;
case PowerDeviceD1:
error = acpi_bus_set_power(PdoData->AcpiHandle, ACPI_STATE_D1);
break;
case PowerDeviceD2:
error = acpi_bus_set_power(PdoData->AcpiHandle, ACPI_STATE_D2);
break;
case PowerDeviceD3:
error = acpi_bus_set_power(PdoData->AcpiHandle, ACPI_STATE_D3);
break;
default:
error = 0;
break;
}
if (ACPI_SUCCESS(error))
{
PoSetPowerState(PdoData->Common.Self, DevicePowerState, powerState);
PdoData->Common.DevicePowerState = powerState.DeviceState;
status = STATUS_SUCCESS;
}
else
status = STATUS_UNSUCCESSFUL;
break;
case SystemPowerState:
PdoData->Common.SystemPowerState = powerState.SystemState;
status = STATUS_SUCCESS;
break;
default:
status = STATUS_NOT_SUPPORTED;
break;
}
break;
case IRP_MN_QUERY_POWER:
status = STATUS_SUCCESS;
break;
case IRP_MN_WAIT_WAKE:
//
// We cannot support wait-wake because we are root-enumerated
// driver, and our parent, the PnP manager, doesn't support wait-wake.
//
case IRP_MN_POWER_SEQUENCE:
default:
status = STATUS_NOT_SUPPORTED;
break;
}
if (status != STATUS_NOT_SUPPORTED) {
Irp->IoStatus.Status = status;
}
PoStartNextPowerIrp(Irp);
status = Irp->IoStatus.Status;
IoCompleteRequest (Irp, IO_NO_INCREMENT);
return status;
}