1 /***************************************************************************
2  * Copyright (c) 2024 Microsoft Corporation
3  *
4  * This program and the accompanying materials are made available under the
5  * terms of the MIT License which is available at
6  * https://opensource.org/licenses/MIT.
7  *
8  * SPDX-License-Identifier: MIT
9  **************************************************************************/
10 
11 /**************************************************************************/
12 /**************************************************************************/
13 /**                                                                       */
14 /** USBX Component                                                        */
15 /**                                                                       */
16 /**   Device Video Class                                                  */
17 /**                                                                       */
18 /**************************************************************************/
19 /**************************************************************************/
20 
21 #define UX_SOURCE_CODE
22 
23 
24 /* Include necessary system files.  */
25 
26 #include "ux_api.h"
27 #include "ux_device_class_video.h"
28 #include "ux_device_stack.h"
29 
30 
31 /**************************************************************************/
32 /*                                                                        */
33 /*  FUNCTION                                               RELEASE        */
34 /*                                                                        */
35 /*    _ux_device_class_video_deactivate                   PORTABLE C      */
36 /*                                                           6.1.11       */
37 /*  AUTHOR                                                                */
38 /*                                                                        */
39 /*    Chaoqiong Xiao, Microsoft Corporation                               */
40 /*                                                                        */
41 /*  DESCRIPTION                                                           */
42 /*                                                                        */
43 /*    This function deactivate an instance of the video class.            */
44 /*                                                                        */
45 /*  INPUT                                                                 */
46 /*                                                                        */
47 /*    command                               Pointer to a class command    */
48 /*                                                                        */
49 /*  OUTPUT                                                                */
50 /*                                                                        */
51 /*    Completion Status                                                   */
52 /*                                                                        */
53 /*  CALLS                                                                 */
54 /*                                                                        */
55 /*    _ux_device_stack_transfer_all_request_abort                         */
56 /*                                          Abort all transfers           */
57 /*                                                                        */
58 /*  CALLED BY                                                             */
59 /*                                                                        */
60 /*    Device Video Class                                                  */
61 /*                                                                        */
62 /*  RELEASE HISTORY                                                       */
63 /*                                                                        */
64 /*    DATE              NAME                      DESCRIPTION             */
65 /*                                                                        */
66 /*  04-25-2022     Chaoqiong Xiao           Initial Version 6.1.11        */
67 /*                                                                        */
68 /**************************************************************************/
_ux_device_class_video_deactivate(UX_SLAVE_CLASS_COMMAND * command)69 UINT  _ux_device_class_video_deactivate(UX_SLAVE_CLASS_COMMAND *command)
70 {
71 
72 UX_DEVICE_CLASS_VIDEO           *video;
73 UX_DEVICE_CLASS_VIDEO_STREAM    *stream;
74 UX_SLAVE_ENDPOINT               *endpoint;
75 UX_SLAVE_CLASS                  *class_inst;
76 UINT                             i;
77 
78 
79     /* Get the class container.  */
80     class_inst =  command -> ux_slave_class_command_class_ptr;
81 
82     /* Get the class instance in the container.  */
83     video = (UX_DEVICE_CLASS_VIDEO *) class_inst -> ux_slave_class_instance;
84 
85     /* Stop pending streams.  */
86     stream = video -> ux_device_class_video_streams;
87     for (i = 0; i < video -> ux_device_class_video_streams_nb; i ++)
88     {
89 
90         /* Locate the endpoint.  */
91         endpoint = stream -> ux_device_class_video_stream_endpoint;
92 
93         /* Terminate the transactions pending on the endpoint.  */
94         if (endpoint)
95             _ux_device_stack_transfer_all_request_abort(endpoint, UX_TRANSFER_BUS_RESET);
96 
97         /* Free the stream.  */
98         stream -> ux_device_class_video_stream_endpoint = UX_NULL;
99         stream -> ux_device_class_video_stream_interface = UX_NULL;
100 
101         stream ++;
102     }
103 
104     /* Free the control.  */
105     video -> ux_device_class_video_interface = UX_NULL;
106 
107     /* If there is a deactivate function call it.  */
108     if (video -> ux_device_class_video_callbacks.ux_slave_class_video_instance_deactivate != UX_NULL)
109 
110         /* Invoke the application.  */
111         video -> ux_device_class_video_callbacks.ux_slave_class_video_instance_deactivate(video);
112 
113     /* Return completion status.  */
114     return(UX_SUCCESS);
115 }
116