diff options
Diffstat (limited to 'usb/driver/dispatch.c')
| -rw-r--r-- | usb/driver/dispatch.c | 99 |
1 files changed, 99 insertions, 0 deletions
diff --git a/usb/driver/dispatch.c b/usb/driver/dispatch.c new file mode 100644 index 0000000..8eccb21 --- /dev/null +++ b/usb/driver/dispatch.c @@ -0,0 +1,99 @@ +/* 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); + } +} + |