1 /**************************************************************************/
2 /* */
3 /* Copyright (c) Microsoft Corporation. All rights reserved. */
4 /* */
5 /* This software is licensed under the Microsoft Software License */
6 /* Terms for Microsoft Azure RTOS. Full text of the license can be */
7 /* found in the LICENSE file at https://aka.ms/AzureRTOS_EULA */
8 /* and in the root directory of this software. */
9 /* */
10 /**************************************************************************/
11
12
13 /**************************************************************************/
14 /**************************************************************************/
15 /** */
16 /** USBX Component */
17 /** */
18 /** Host Stack */
19 /** */
20 /**************************************************************************/
21 /**************************************************************************/
22
23
24 /* Include necessary system files. */
25
26 #define UX_SOURCE_CODE
27
28 #include "ux_api.h"
29 #include "ux_host_stack.h"
30
31
32 /**************************************************************************/
33 /* */
34 /* FUNCTION RELEASE */
35 /* */
36 /* _ux_host_stack_configuration_instance_delete PORTABLE C */
37 /* 6.2.0 */
38 /* AUTHOR */
39 /* */
40 /* Chaoqiong Xiao, Microsoft Corporation */
41 /* */
42 /* DESCRIPTION */
43 /* */
44 /* This function will delete a configuration instance. It does not */
45 /* delete configuration container but it deletes all the alternate */
46 /* current alternate settings for each interface it owns. */
47 /* */
48 /* INPUT */
49 /* */
50 /* configuration Pointer to configuration */
51 /* */
52 /* OUTPUT */
53 /* */
54 /* Completion Status */
55 /* */
56 /* CALLS */
57 /* */
58 /* _ux_host_stack_interface_instance_delete Delete interface instance */
59 /* */
60 /* CALLED BY */
61 /* */
62 /* USBX Components */
63 /* */
64 /* RELEASE HISTORY */
65 /* */
66 /* DATE NAME DESCRIPTION */
67 /* */
68 /* 05-19-2020 Chaoqiong Xiao Initial Version 6.0 */
69 /* 09-30-2020 Chaoqiong Xiao Modified comment(s), */
70 /* resulting in version 6.1 */
71 /* 07-29-2022 Chaoqiong Xiao Modified comment(s), */
72 /* fixed parameter/variable */
73 /* names conflict C++ keyword, */
74 /* resulting in version 6.1.12 */
75 /* 10-31-2022 Chaoqiong Xiao Modified comment(s), */
76 /* added interface instance */
77 /* creation strategy control, */
78 /* resulting in version 6.2.0 */
79 /* */
80 /**************************************************************************/
_ux_host_stack_configuration_instance_delete(UX_CONFIGURATION * configuration)81 VOID _ux_host_stack_configuration_instance_delete(UX_CONFIGURATION *configuration)
82 {
83
84 UX_INTERFACE *interface_ptr;
85 ULONG current_alternate_setting;
86
87 /* If trace is enabled, insert this event into the trace buffer. */
88 UX_TRACE_IN_LINE_INSERT(UX_TRACE_HOST_STACK_CONFIGURATION_INSTANCE_DELETE, configuration, 0, 0, 0, UX_TRACE_HOST_STACK_EVENTS, 0, 0)
89
90 /* Obtain the first interface for this configuration. */
91 interface_ptr = configuration -> ux_configuration_first_interface;
92
93 /* In order to keep the compiler happy, we reset the alternate setting. */
94 current_alternate_setting = 0;
95
96 /* Each selected alternate setting for each interface must be deleted. */
97 while (interface_ptr != UX_NULL)
98 {
99
100 /* If this is the first alternate setting, the current alternate setting is maintained here. */
101 if (interface_ptr -> ux_interface_descriptor.bAlternateSetting == 0)
102 {
103
104 current_alternate_setting = interface_ptr -> ux_interface_current_alternate_setting;
105 }
106
107 if (interface_ptr -> ux_interface_descriptor.bAlternateSetting == current_alternate_setting)
108 {
109
110 #if UX_HOST_STACK_CONFIGURATION_INSTANCE_CREATE_CONTROL == UX_HOST_STACK_CONFIGURATION_INSTANCE_CREATE_OWNED
111
112 /* If interface is usable, remove physical creates. */
113 if (interface_ptr -> ux_interface_class || configuration -> ux_configuration_device -> ux_device_class)
114 #endif
115 _ux_host_stack_interface_instance_delete(interface_ptr);
116 }
117
118 interface_ptr = interface_ptr -> ux_interface_next_interface;
119 }
120
121 return;
122 }
123
124
