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 /** HID 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_hid.h"
30 #include "ux_host_stack.h"
31
32
33 /**************************************************************************/
34 /* */
35 /* FUNCTION RELEASE */
36 /* */
37 /* _ux_host_class_hid_periodic_report_start PORTABLE C */
38 /* 6.1.10 */
39 /* AUTHOR */
40 /* */
41 /* Chaoqiong Xiao, Microsoft Corporation */
42 /* */
43 /* DESCRIPTION */
44 /* */
45 /* This function starts the interrupt endpoint to obtain the periodic */
46 /* report. */
47 /* */
48 /* INPUT */
49 /* */
50 /* hid Pointer to HID class */
51 /* */
52 /* OUTPUT */
53 /* */
54 /* Completion Status */
55 /* */
56 /* CALLS */
57 /* */
58 /* _ux_host_stack_class_instance_verify Verify instance is valid */
59 /* _ux_host_stack_transfer_request Process transfer request */
60 /* _ux_host_semaphore_get Get protection semaphore */
61 /* _ux_host_semaphore_put Release protection semaphore */
62 /* */
63 /* CALLED BY */
64 /* */
65 /* Application */
66 /* HID Class */
67 /* */
68 /* RELEASE HISTORY */
69 /* */
70 /* DATE NAME DESCRIPTION */
71 /* */
72 /* 05-19-2020 Chaoqiong Xiao Initial Version 6.0 */
73 /* 09-30-2020 Chaoqiong Xiao Modified comment(s), */
74 /* resulting in version 6.1 */
75 /* 01-31-2022 Chaoqiong Xiao Modified comment(s), */
76 /* added standalone support, */
77 /* resulting in version 6.1.10 */
78 /* */
79 /**************************************************************************/
_ux_host_class_hid_periodic_report_start(UX_HOST_CLASS_HID * hid)80 UINT _ux_host_class_hid_periodic_report_start(UX_HOST_CLASS_HID *hid)
81 {
82 #if defined(UX_HOST_STANDALONE)
83 UX_INTERRUPT_SAVE_AREA
84 #endif
85 UINT status;
86 UX_TRANSFER *transfer_request;
87
88
89 /* Ensure the instance is valid. */
90 if (_ux_host_stack_class_instance_verify(_ux_system_host_class_hid_name, (VOID *) hid) != UX_SUCCESS)
91 {
92
93 /* Error trap. */
94 _ux_system_error_handler(UX_SYSTEM_LEVEL_THREAD, UX_SYSTEM_CONTEXT_CLASS, UX_HOST_CLASS_INSTANCE_UNKNOWN);
95
96 /* If trace is enabled, insert this event into the trace buffer. */
97 UX_TRACE_IN_LINE_INSERT(UX_TRACE_ERROR, UX_HOST_CLASS_INSTANCE_UNKNOWN, hid, 0, 0, UX_TRACE_ERRORS, 0, 0)
98
99 return(UX_HOST_CLASS_INSTANCE_UNKNOWN);
100 }
101
102 /* Protect thread reentry to this instance. */
103 _ux_host_class_hid_lock_fail_return(hid);
104
105 /* Check the status of the interrupt endpoint. */
106 if (hid -> ux_host_class_hid_interrupt_endpoint_status != UX_HOST_CLASS_HID_INTERRUPT_ENDPOINT_READY)
107 {
108
109 /* Unprotect thread reentry to this instance. */
110 _ux_host_class_hid_unlock(hid);
111
112 /* Error trap. */
113 _ux_system_error_handler(UX_SYSTEM_LEVEL_THREAD, UX_SYSTEM_CONTEXT_CLASS, UX_HOST_CLASS_HID_PERIODIC_REPORT_ERROR);
114
115 /* If trace is enabled, insert this event into the trace buffer. */
116 UX_TRACE_IN_LINE_INSERT(UX_TRACE_ERROR, UX_HOST_CLASS_HID_PERIODIC_REPORT_ERROR, hid, 0, 0, UX_TRACE_ERRORS, 0, 0)
117
118 /* Return error status. */
119 return(UX_HOST_CLASS_HID_PERIODIC_REPORT_ERROR);
120 }
121
122 /* Get the address of the HID associated with the interrupt endpoint. */
123 transfer_request = &hid -> ux_host_class_hid_interrupt_endpoint -> ux_endpoint_transfer_request;
124
125 /* The transfer on the interrupt endpoint can be started. */
126 status = _ux_host_stack_transfer_request(transfer_request);
127
128 /* Check the status. If no error, adjust the status of the periodic endpoint
129 to active. */
130 if (status == UX_SUCCESS)
131 hid -> ux_host_class_hid_interrupt_endpoint_status = UX_HOST_CLASS_HID_INTERRUPT_ENDPOINT_ACTIVE;
132
133 /* Unprotect thread reentry to this instance. */
134 _ux_host_class_hid_unlock(hid);
135
136 /* Return the function status */
137 return(status);
138 }
139
