1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
|
/* 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;
switch(IoGetCurrentIrpStackLocation(irp)->MajorFunction)
{
case IRP_MJ_PNP:
return dispatch_pnp(dev, irp);
case IRP_MJ_POWER:
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(IoGetCurrentIrpStackLocation(irp)->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)
{
if(InterlockedIncrement(&dev->ref_count) == 1)
{
if(dev->power_state.DeviceState != PowerDeviceD0)
{
/* 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:
if(!InterlockedDecrement(&dev->ref_count))
{
/* release all interfaces when the last handle is closed */
release_all_interfaces(dev);
}
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);
}
}
|
