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 /** PIMA 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_pima.h"
30 #include "ux_host_stack.h"
31
32
33 /**************************************************************************/
34 /* */
35 /* FUNCTION RELEASE */
36 /* */
37 /* _ux_host_class_pima_device_reset PORTABLE C */
38 /* 6.1 */
39 /* AUTHOR */
40 /* */
41 /* Chaoqiong Xiao, Microsoft Corporation */
42 /* */
43 /* DESCRIPTION */
44 /* */
45 /* This function resets the device. */
46 /* INPUT */
47 /* */
48 /* pima Pointer to pima class */
49 /* */
50 /* OUTPUT */
51 /* */
52 /* Completion Status */
53 /* */
54 /* CALLS */
55 /* */
56 /* _ux_host_stack_transfer_request Transfer request */
57 /* */
58 /* CALLED BY */
59 /* */
60 /* USB application */
61 /* */
62 /* RELEASE HISTORY */
63 /* */
64 /* DATE NAME DESCRIPTION */
65 /* */
66 /* 05-19-2020 Chaoqiong Xiao Initial Version 6.0 */
67 /* 09-30-2020 Chaoqiong Xiao Modified comment(s), */
68 /* resulting in version 6.1 */
69 /* */
70 /**************************************************************************/
_ux_host_class_pima_device_reset(UX_HOST_CLASS_PIMA * pima)71 UINT _ux_host_class_pima_device_reset(UX_HOST_CLASS_PIMA *pima)
72 {
73
74 UX_TRANSFER *transfer_request;
75 UX_ENDPOINT *control_endpoint;
76 UINT status;
77
78 /* If trace is enabled, insert this event into the trace buffer. */
79 UX_TRACE_IN_LINE_INSERT(UX_TRACE_HOST_CLASS_PIMA_DEVICE_RESET, pima, 0, 0, 0, UX_TRACE_HOST_CLASS_EVENTS, 0, 0)
80
81 /* We need to get the default control endpoint transfer request pointer. */
82 control_endpoint = &pima -> ux_host_class_pima_device -> ux_device_control_endpoint;
83 transfer_request = &control_endpoint -> ux_endpoint_transfer_request;
84
85 /* Create a transfer_request for the CANCEL request. */
86 transfer_request -> ux_transfer_request_data_pointer = UX_NULL;
87 transfer_request -> ux_transfer_request_requested_length = 0;
88 transfer_request -> ux_transfer_request_function = UX_HOST_CLASS_PIMA_REQUEST_RESET_DEVICE;
89 transfer_request -> ux_transfer_request_type = UX_REQUEST_OUT | UX_REQUEST_TYPE_CLASS | UX_REQUEST_TARGET_INTERFACE;
90 transfer_request -> ux_transfer_request_value = 0;
91 transfer_request -> ux_transfer_request_index = 0;
92
93 /* Send request to HCD layer. */
94 status = _ux_host_stack_transfer_request(transfer_request);
95
96 /* Reset the session pointer if it was opened. A device reset closes the session. */
97 pima -> ux_host_class_pima_session = UX_NULL;
98
99 /* Return completion status. */
100 return(status);
101
102 }
103
104
