blob: 5dc3b7986892d2544bcdca6b057c56292b2dfe3c (
plain)
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
|
/***************************************************************************
* 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 Audio Class */
/** */
/**************************************************************************/
/**************************************************************************/
#define UX_SOURCE_CODE
/* Include necessary system files. */
#include "ux_api.h"
#include "ux_device_class_audio.h"
#include "ux_device_stack.h"
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _ux_device_class_audio_entry PORTABLE C */
/* 6.x */
/* AUTHOR */
/* */
/* Chaoqiong Xiao, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function is the entry point of the audio class. It */
/* will be called by the device stack enumeration module when the */
/* host has sent a SET_CONFIGURATION command and the audio interface */
/* needs to be mounted. */
/* */
/* INPUT */
/* */
/* command Pointer to class command */
/* */
/* OUTPUT */
/* */
/* Completion Status */
/* */
/* CALLS */
/* */
/* _ux_device_class_audio_initialize Initialize audio class */
/* _ux_device_class_audio_uninitialize Uninitialize audio class */
/* _ux_device_class_audio_activate Activate audio class */
/* _ux_device_class_audio_change Change audio interface */
/* _ux_device_class_audio_deactivate Deactivate audio class */
/* _ux_device_class_audio_control_request Request control */
/* */
/* CALLED BY */
/* */
/* Device Stack */
/* */
/**************************************************************************/
UINT _ux_device_class_audio_entry(UX_SLAVE_CLASS_COMMAND *command)
{
UINT status;
/* The command request will tell us we need to do here, either a enumeration
query, an activation or a deactivation. */
switch (command -> ux_slave_class_command_request)
{
case UX_SLAVE_CLASS_COMMAND_INITIALIZE:
/* Call the init function of the Audio class. */
#if defined(UX_DEVICE_CLASS_AUDIO_ENABLE_ERROR_CHECKING)
status = _uxe_device_class_audio_initialize(command);
#else
status = _ux_device_class_audio_initialize(command);
#endif
/* Return the completion status. */
return(status);
case UX_SLAVE_CLASS_COMMAND_UNINITIALIZE:
/* Call the uninit function of the Audio class. */
status = _ux_device_class_audio_uninitialize(command);
/* Return the completion status. */
return(status);
case UX_SLAVE_CLASS_COMMAND_QUERY:
/* Check the CLASS definition in the interface descriptor. */
if (command -> ux_slave_class_command_class == UX_DEVICE_CLASS_AUDIO_CLASS)
{
if (command -> ux_slave_class_command_subclass == UX_DEVICE_CLASS_AUDIO_SUBCLASS_CONTROL)
return(UX_SUCCESS);
if (command -> ux_slave_class_command_subclass == UX_DEVICE_CLASS_AUDIO_SUBCLASS_AUDIOSTREAMING)
return(UX_SUCCESS);
}
return(UX_NO_CLASS_MATCH);
case UX_SLAVE_CLASS_COMMAND_ACTIVATE:
/* The activate command is used when the host has sent a SET_CONFIGURATION command
and this interface has to be mounted. Both Bulk endpoints have to be mounted
and the audio thread needs to be activated. */
status = _ux_device_class_audio_activate(command);
/* Return the completion status. */
return(status);
case UX_SLAVE_CLASS_COMMAND_CHANGE:
/* The change command is used when the host has sent a SET_INTERFACE command
to go from Alternate Setting 0 to 1 or revert to the default mode. */
status = _ux_device_class_audio_change(command);
/* Return the completion status. */
return(status);
case UX_SLAVE_CLASS_COMMAND_DEACTIVATE:
/* The deactivate command is used when the device has been extracted.
The device endpoints have to be dismounted and the audio thread canceled. */
status = _ux_device_class_audio_deactivate(command);
/* Return the completion status. */
return(status);
case UX_SLAVE_CLASS_COMMAND_REQUEST:
/* The request command is used when the host sends a command on the control endpoint. */
return _ux_device_class_audio_control_request(command);
default:
/* Return an error. */
return(UX_FUNCTION_NOT_SUPPORTED);
}
}
|
