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 /** Device Stack */
19 /** */
20 /**************************************************************************/
21 /**************************************************************************/
22
23 #define UX_SOURCE_CODE
24
25
26 /* Include necessary system files. */
27
28 #include "ux_api.h"
29 #include "ux_device_stack.h"
30
31 /**************************************************************************/
32 /* */
33 /* FUNCTION RELEASE */
34 /* */
35 /* _ux_device_stack_uninitialize PORTABLE C */
36 /* 6.1.10 */
37 /* AUTHOR */
38 /* */
39 /* Chaoqiong Xiao, Microsoft Corporation */
40 /* */
41 /* DESCRIPTION */
42 /* */
43 /* This function uninitializes the generic portion of the device side */
44 /* of USBX. */
45 /* */
46 /* INPUT */
47 /* */
48 /* OUTPUT */
49 /* */
50 /* Completion Status */
51 /* */
52 /* CALLS */
53 /* */
54 /* _ux_utility_memory_free Free */
55 /* _ux_utility_semaphore_delete Delete semaphore */
56 /* */
57 /* CALLED BY */
58 /* */
59 /* Application */
60 /* */
61 /* RELEASE HISTORY */
62 /* */
63 /* DATE NAME DESCRIPTION */
64 /* */
65 /* 05-19-2020 Chaoqiong Xiao Initial Version 6.0 */
66 /* 09-30-2020 Chaoqiong Xiao Modified comment(s), */
67 /* resulting in version 6.1 */
68 /* 04-02-2021 Chaoqiong Xiao Modified comment(s), */
69 /* fixed uninitialize in case */
70 /* there is no EP except EP0, */
71 /* resulting in version 6.1.6 */
72 /* 01-31-2022 Chaoqiong Xiao Modified comment(s), */
73 /* added standalone support, */
74 /* resulting in version 6.1.10 */
75 /* */
76 /**************************************************************************/
_ux_device_stack_uninitialize(VOID)77 UINT _ux_device_stack_uninitialize(VOID)
78 {
79 UX_SLAVE_DEVICE *device;
80 UX_SLAVE_ENDPOINT *endpoints_pool;
81 UX_SLAVE_TRANSFER *transfer_request;
82 ULONG endpoints_found;
83
84 /* If trace is enabled, insert this event into the trace buffer. */
85 UX_TRACE_IN_LINE_INSERT(UX_TRACE_DEVICE_STACK_INITIALIZE, 0, 0, 0, 0, UX_TRACE_DEVICE_STACK_EVENTS, 0, 0)
86
87 /* Get the pointer to the device. */
88 device = &_ux_system_slave -> ux_system_slave_device;
89
90 /* Free class memory. */
91 _ux_utility_memory_free(_ux_system_slave -> ux_system_slave_class_array);
92
93 /* Allocate some memory for the Control Endpoint. First get the address of the transfer request for the
94 control endpoint. */
95 transfer_request = &device -> ux_slave_device_control_endpoint.ux_slave_endpoint_transfer_request;
96
97 /* Free memory for the control endpoint buffer. */
98 _ux_utility_memory_free(transfer_request -> ux_slave_transfer_request_data_pointer);
99
100 /* Get the number of endpoints found in the device framework. */
101 endpoints_found = device -> ux_slave_device_endpoints_pool_number;
102
103 /* Get the endpoint pool address in the device container. */
104 endpoints_pool = device -> ux_slave_device_endpoints_pool;
105
106 /* Parse all endpoints and fee memory and semaphore. */
107 while (endpoints_found-- != 0)
108 {
109 /* Free the memory for endpoint data pointer. */
110 _ux_utility_memory_free(endpoints_pool -> ux_slave_endpoint_transfer_request.ux_slave_transfer_request_data_pointer);
111
112 /* Remove the TX semaphore for the endpoint. */
113 _ux_device_semaphore_delete(&endpoints_pool -> ux_slave_endpoint_transfer_request.ux_slave_transfer_request_semaphore);
114
115 /* Next endpoint. */
116 endpoints_pool++;
117 }
118
119 /* Free the endpoint pool address in the device container. */
120 if (device -> ux_slave_device_endpoints_pool)
121 _ux_utility_memory_free(device -> ux_slave_device_endpoints_pool);
122
123 /* Free memory for interface pool. */
124 _ux_utility_memory_free(device -> ux_slave_device_interfaces_pool);
125
126 /* Return successful completion. */
127 return(UX_SUCCESS);
128 }
129
130
131
132
133
