1 /* libusb-win32, Generic Windows USB Library
2 * Copyright (c) 2002-2005 Stephan Meyer <ste_meyer@web.de>
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
17 */
18
19
20 #include "libusb_driver.h"
21
22
23
release_interface(libusb_device_t * dev,FILE_OBJECT * file_object,int interface)24 NTSTATUS release_interface(libusb_device_t *dev, FILE_OBJECT *file_object,
25 int interface)
26 {
27 USBMSG("interface %d\n", interface);
28
29 if (!dev->config.value)
30 {
31 USBERR0("device is not configured\n");
32 return STATUS_INVALID_DEVICE_STATE;
33 }
34
35 if (interface >= LIBUSB_MAX_NUMBER_OF_INTERFACES)
36 {
37 USBERR("interface number %d too high\n",
38 interface);
39 return STATUS_INVALID_PARAMETER;
40 }
41
42 if (!dev->config.interfaces[interface].valid)
43 {
44 USBERR("invalid interface %02d\n", interface);
45 return STATUS_INVALID_PARAMETER;
46 }
47
48 if (!dev->config.interfaces[interface].file_object)
49 {
50 USBERR("could not release interface %d, interface is not claimed\n", interface);
51 return STATUS_INVALID_DEVICE_STATE;
52 }
53
54 if (dev->config.interfaces[interface].file_object != file_object)
55 {
56 USBERR("could not release interface %d, interface is not bound to this file object\n", interface);
57 return STATUS_DEVICE_BUSY;
58 }
59
60 dev->config.interfaces[interface].file_object = NULL;
61
62 return STATUS_SUCCESS;
63 }
64
release_interface_ex(libusb_device_t * dev,FILE_OBJECT * file_object,interface_request_t * interface_request)65 NTSTATUS release_interface_ex(libusb_device_t *dev,
66 FILE_OBJECT *file_object,
67 interface_request_t* interface_request)
68 {
69 PUSB_INTERFACE_DESCRIPTOR interface_descriptor;
70
71 USBMSG("interface-%s=%d\n",
72 interface_request->intf_use_index ? "index" : "number",
73 interface_request->intf_use_index ? interface_request->interface_index : interface_request->interface_number);
74
75 if (!dev->config.value || !dev->config.descriptor)
76 {
77 USBERR0("device is not configured\n");
78 return STATUS_INVALID_DEVICE_STATE;
79 }
80
81 interface_request->altsetting_index=FIND_INTERFACE_INDEX_ANY;
82 interface_descriptor = find_interface_desc_ex(dev->config.descriptor,dev->config.total_size,interface_request,NULL);
83 if (!interface_descriptor)
84 {
85 return STATUS_NO_MORE_ENTRIES;
86 }
87 return release_interface(dev, file_object, interface_descriptor->bInterfaceNumber);
88 }
89
release_all_interfaces(libusb_device_t * dev,FILE_OBJECT * file_object)90 NTSTATUS release_all_interfaces(libusb_device_t *dev, FILE_OBJECT *file_object)
91 {
92 int i;
93
94 USBMSG("releasing all interfaces bound to file object 0x%x\n", file_object);
95
96 for (i = 0; i < LIBUSB_MAX_NUMBER_OF_INTERFACES; i++)
97 {
98 if (dev->config.interfaces[i].file_object == file_object)
99 {
100 dev->config.interfaces[i].file_object = NULL;
101 }
102 }
103
104 return STATUS_SUCCESS;
105 }
106