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 /** Prolific Class */
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_class_prolific.h"
30 #include "ux_host_stack.h"
31
32
33 /**************************************************************************/
34 /* */
35 /* FUNCTION RELEASE */
36 /* */
37 /* _ux_host_class_prolific_command PORTABLE C */
38 /* 6.1.10 */
39 /* AUTHOR */
40 /* */
41 /* Chaoqiong Xiao, Microsoft Corporation */
42 /* */
43 /* DESCRIPTION */
44 /* */
45 /* This function will send a command to the Prolific device. */
46 /* The command can be one of the following : */
47 /* SET_CONTROL */
48 /* SET_LINE */
49 /* SEND_BREAK */
50 /* */
51 /* */
52 /* INPUT */
53 /* */
54 /* prolific Pointer to prolific class */
55 /* command command value */
56 /* value value to be sent in the */
57 /* command request */
58 /* data_buffer buffer to be sent */
59 /* data_length length of the buffer to send */
60 /* */
61 /* */
62 /* OUTPUT */
63 /* */
64 /* Completion Status */
65 /* */
66 /* CALLS */
67 /* */
68 /* _ux_host_stack_transfer_request Process transfer request */
69 /* _ux_host_semaphore_get Get semaphore */
70 /* */
71 /* CALLED BY */
72 /* */
73 /* Storage Class */
74 /* */
75 /* RELEASE HISTORY */
76 /* */
77 /* DATE NAME DESCRIPTION */
78 /* */
79 /* 05-19-2020 Chaoqiong Xiao Initial Version 6.0 */
80 /* 09-30-2020 Chaoqiong Xiao Modified comment(s), */
81 /* resulting in version 6.1 */
82 /* 01-31-2022 Chaoqiong Xiao Modified comment(s), */
83 /* refined macros names, */
84 /* resulting in version 6.1.10 */
85 /* */
86 /**************************************************************************/
_ux_host_class_prolific_command(UX_HOST_CLASS_PROLIFIC * prolific,ULONG command,ULONG value,UCHAR * data_buffer,ULONG data_length)87 UINT _ux_host_class_prolific_command(UX_HOST_CLASS_PROLIFIC *prolific, ULONG command,
88 ULONG value, UCHAR *data_buffer, ULONG data_length)
89 {
90
91 UX_ENDPOINT *control_endpoint;
92 UX_TRANSFER *transfer_request;
93 UINT status;
94
95
96 /* We need to get the default control endpoint transfer request pointer. */
97 control_endpoint = &prolific -> ux_host_class_prolific_device -> ux_device_control_endpoint;
98 transfer_request = &control_endpoint -> ux_endpoint_transfer_request;
99
100 /* Protect the control endpoint semaphore here. It will be unprotected in the
101 transfer request function. */
102 status = _ux_host_semaphore_get(&prolific -> ux_host_class_prolific_device -> ux_device_protection_semaphore, UX_WAIT_FOREVER);
103
104 /* Check for status. */
105 if (status != UX_SUCCESS)
106
107 /* Something went wrong. */
108 return(status);
109
110 /* Create a transfer_request for the request. */
111 transfer_request -> ux_transfer_request_data_pointer = data_buffer;
112 transfer_request -> ux_transfer_request_requested_length = data_length;
113 transfer_request -> ux_transfer_request_function = command;
114 transfer_request -> ux_transfer_request_type = UX_REQUEST_OUT | UX_REQUEST_TYPE_CLASS | UX_REQUEST_TARGET_INTERFACE;
115 transfer_request -> ux_transfer_request_value = value;
116 transfer_request -> ux_transfer_request_index = prolific -> ux_host_class_prolific_interface -> ux_interface_descriptor.bInterfaceNumber;
117
118 /* Send request to HCD layer. */
119 status = _ux_host_stack_transfer_request(transfer_request);
120
121 /* Return completion status. */
122 return(status);
123 }
124
125
