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
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
|
/***************************************************************************
* Copyright (c) 2024 Microsoft Corporation
* Copyright (c) 2026-present Eclipse ThreadX contributors
*
* This program and the accompanying materials are made available under the
* terms of the MIT License which is available at
* https://opensource.org/licenses/MIT.
*
* SPDX-License-Identifier: MIT
**************************************************************************/
/**************************************************************************/
/**************************************************************************/
/** */
/** USBX Component */
/** */
/** Device Stack */
/** */
/**************************************************************************/
/**************************************************************************/
#define UX_SOURCE_CODE
/* Include necessary system files. */
#include "ux_api.h"
#include "ux_device_stack.h"
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _ux_device_stack_disconnect PORTABLE C */
/* 6.1.12 */
/* AUTHOR */
/* */
/* Chaoqiong Xiao, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function is called when the device gets disconnected from the */
/* host. All the device resources are freed. */
/* */
/* */
/* INPUT */
/* */
/* None */
/* */
/* OUTPUT */
/* */
/* Completion Status */
/* */
/* CALLS */
/* */
/* (ux_slave_class_entry_function) Device class entry function */
/* (ux_slave_dcd_function) DCD dispatch function */
/* _ux_device_stack_interface_delete Delete interface */
/* */
/* CALLED BY */
/* */
/* Application */
/* Device Stack */
/* */
/**************************************************************************/
UINT _ux_device_stack_disconnect(VOID)
{
UX_SLAVE_DCD *dcd;
UX_SLAVE_DEVICE *device;
UX_SLAVE_INTERFACE *interface_ptr;
#if !defined(UX_DEVICE_INITIALIZE_FRAMEWORK_SCAN_DISABLE) || UX_MAX_DEVICE_INTERFACES > 1
UX_SLAVE_INTERFACE *next_interface;
#endif
UX_SLAVE_CLASS *class_ptr;
UX_SLAVE_CLASS_COMMAND class_command;
UINT status = UX_ERROR;
/* Get the pointer to the DCD. */
dcd = &_ux_system_slave -> ux_system_slave_dcd;
/* Get the pointer to the device. */
device = &_ux_system_slave -> ux_system_slave_device;
/* If trace is enabled, insert this event into the trace buffer. */
UX_TRACE_IN_LINE_INSERT(UX_TRACE_DEVICE_STACK_DISCONNECT, device, 0, 0, 0, UX_TRACE_DEVICE_STACK_EVENTS, 0, 0)
/* If trace is enabled, register this object. */
UX_TRACE_OBJECT_UNREGISTER(device);
/* If the device was in the configured state, there may be interfaces
attached to the configuration. */
if (device -> ux_slave_device_state == UX_DEVICE_CONFIGURED)
{
/* Get the pointer to the first interface. */
interface_ptr = device -> ux_slave_device_first_interface;
#if !defined(UX_DEVICE_INITIALIZE_FRAMEWORK_SCAN_DISABLE) || UX_MAX_DEVICE_INTERFACES > 1
/* Parse all the interfaces if any. */
while (interface_ptr != UX_NULL)
{
#endif
/* Build all the fields of the Class Command. */
class_command.ux_slave_class_command_request = UX_SLAVE_CLASS_COMMAND_DEACTIVATE;
class_command.ux_slave_class_command_interface = (VOID *) interface_ptr;
/* Get the pointer to the class container of this interface. */
class_ptr = interface_ptr -> ux_slave_interface_class;
/* Store the class container. */
class_command.ux_slave_class_command_class_ptr = class_ptr;
/* If there is a class container for this instance, deactivate it. */
if (class_ptr != UX_NULL)
/* Call the class with the DEACTIVATE signal. */
class_ptr -> ux_slave_class_entry_function(&class_command);
#if !defined(UX_DEVICE_INITIALIZE_FRAMEWORK_SCAN_DISABLE) || UX_MAX_DEVICE_INTERFACES > 1
/* Get the next interface. */
next_interface = interface_ptr -> ux_slave_interface_next_interface;
#endif
/* Remove the interface and all endpoints associated with it. */
_ux_device_stack_interface_delete(interface_ptr);
#if !defined(UX_DEVICE_INITIALIZE_FRAMEWORK_SCAN_DISABLE) || UX_MAX_DEVICE_INTERFACES > 1
/* Now we refresh the interface pointer. */
interface_ptr = next_interface;
}
#endif
/* Mark the device as attached now. */
device -> ux_slave_device_state = UX_DEVICE_ATTACHED;
}
/* If the device was attached, we need to destroy the control endpoint. */
if (device -> ux_slave_device_state == UX_DEVICE_ATTACHED)
/* Now we can destroy the default control endpoint. */
status = dcd -> ux_slave_dcd_function(dcd, UX_DCD_DESTROY_ENDPOINT,
(VOID *) &device -> ux_slave_device_control_endpoint);
/* We are reverting to configuration 0. */
device -> ux_slave_device_configuration_selected = 0;
/* Set the device to be non attached. */
device -> ux_slave_device_state = UX_DEVICE_RESET;
/* Check the status change callback. */
if(_ux_system_slave -> ux_system_slave_change_function != UX_NULL)
{
/* Inform the application if a callback function was programmed. */
_ux_system_slave -> ux_system_slave_change_function(UX_DEVICE_REMOVED);
}
/* Return the status to the caller. */
return(status);
}
|
