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/* libusb-win32, Generic Windows USB Library
* Copyright (c) 2002-2005 Stephan Meyer <ste_meyer@web.de>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "libusb_driver.h"
NTSTATUS DDKAPI dispatch(DEVICE_OBJECT *device_object, IRP *irp)
{
libusb_device_t *dev = device_object->DeviceExtension;
IO_STACK_LOCATION *stack_location = IoGetCurrentIrpStackLocation(irp);
switch (stack_location->MajorFunction)
{
case IRP_MJ_PNP:
return dispatch_pnp(dev, irp);
case IRP_MJ_POWER:
// ID: 2960644 (farthen)
// You can't set the power state if the device is not handled at all
if(!dev->next_stack_device)
{
return complete_irp(irp, STATUS_INVALID_DEVICE_STATE, 0);
}
return dispatch_power(dev, irp);
}
/* since this driver may run as an upper filter we have to check whether */
/* the IRP is sent to this device object or to the lower one */
if (accept_irp(dev, irp))
{
switch (stack_location->MajorFunction)
{
case IRP_MJ_DEVICE_CONTROL:
if (dev->is_started)
{
return dispatch_ioctl(dev, irp);
}
else /* not started yet */
{
return complete_irp(irp, STATUS_INVALID_DEVICE_STATE, 0);
}
case IRP_MJ_CREATE:
if (dev->is_started)
{
// only one driver can act as power policy owner and
// power_set_device_state() can only be issued by the PPO.
// disallow_power_control is set to true for drivers which
// we know cause a BSOD on any attempt to request power irps.
if (dev->power_state.DeviceState != PowerDeviceD0 && !dev->disallow_power_control)
{
/* power up the device, block until the call */
/* completes */
power_set_device_state(dev, PowerDeviceD0, TRUE);
}
return complete_irp(irp, STATUS_SUCCESS, 0);
}
else /* not started yet */
{
return complete_irp(irp, STATUS_INVALID_DEVICE_STATE, 0);
}
case IRP_MJ_CLOSE:
/* release all interfaces bound to this file object */
release_all_interfaces(dev, stack_location->FileObject);
return complete_irp(irp, STATUS_SUCCESS, 0);
case IRP_MJ_CLEANUP:
return complete_irp(irp, STATUS_SUCCESS, 0);
default:
return complete_irp(irp, STATUS_NOT_SUPPORTED, 0);
}
}
else /* the IRP is for the lower device object */
{
return pass_irp_down(dev, irp, NULL, NULL);
}
}
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