1 |
|
|
/*************************************************************************** |
2 |
|
|
* Copyright (c) 2024 Microsoft Corporation |
3 |
|
|
* Copyright (c) 2026-present Eclipse ThreadX contributors |
4 |
|
|
* |
5 |
|
|
* This program and the accompanying materials are made available under the |
6 |
|
|
* terms of the MIT License which is available at |
7 |
|
|
* https://opensource.org/licenses/MIT. |
8 |
|
|
* |
9 |
|
|
* SPDX-License-Identifier: MIT |
10 |
|
|
**************************************************************************/ |
11 |
|
|
|
12 |
|
|
|
13 |
|
|
/**************************************************************************/ |
14 |
|
|
/**************************************************************************/ |
15 |
|
|
/** */ |
16 |
|
|
/** USBX Component */ |
17 |
|
|
/** */ |
18 |
|
|
/** Host Stack */ |
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_stack.h" |
30 |
|
|
|
31 |
|
|
|
32 |
|
|
/**************************************************************************/ |
33 |
|
|
/* */ |
34 |
|
|
/* FUNCTION RELEASE */ |
35 |
|
|
/* */ |
36 |
|
|
/* _ux_host_stack_interface_setting_select PORTABLE C */ |
37 |
|
|
/* 6.1.12 */ |
38 |
|
|
/* AUTHOR */ |
39 |
|
|
/* */ |
40 |
|
|
/* Chaoqiong Xiao, Microsoft Corporation */ |
41 |
|
|
/* */ |
42 |
|
|
/* DESCRIPTION */ |
43 |
|
|
/* */ |
44 |
|
|
/* This function selects a specific alternate setting for a given */ |
45 |
|
|
/* interface belonging to the selected configuration. */ |
46 |
|
|
/* */ |
47 |
|
|
/* INPUT */ |
48 |
|
|
/* */ |
49 |
|
|
/* interface Pointer to interface */ |
50 |
|
|
/* */ |
51 |
|
|
/* OUTPUT */ |
52 |
|
|
/* */ |
53 |
|
|
/* Completion Status */ |
54 |
|
|
/* */ |
55 |
|
|
/* CALLS */ |
56 |
|
|
/* */ |
57 |
|
|
/* _ux_host_stack_interface_instance_create Create interface instance */ |
58 |
|
|
/* _ux_host_stack_interface_instance_delete Delete interface instance */ |
59 |
|
|
/* _ux_host_stack_interface_set Set interface instance */ |
60 |
|
|
/* _ux_host_semaphore_get Get semaphore */ |
61 |
|
|
/* _ux_host_semaphore_put Put semaphore */ |
62 |
|
|
/* */ |
63 |
|
|
/* CALLED BY */ |
64 |
|
|
/* */ |
65 |
|
|
/* Application */ |
66 |
|
|
/* USBX Components */ |
67 |
|
|
/* */ |
68 |
|
|
/**************************************************************************/ |
69 |
|
168 |
UINT _ux_host_stack_interface_setting_select(UX_INTERFACE *interface_ptr) |
70 |
|
|
{ |
71 |
|
|
|
72 |
|
|
UX_CONFIGURATION *configuration; |
73 |
|
|
UX_INTERFACE *current_interface; |
74 |
|
|
UX_INTERFACE *previous_interface; |
75 |
|
|
UX_INTERFACE *main_interface; |
76 |
|
|
UINT current_interface_number; |
77 |
|
|
UINT current_alternate_setting; |
78 |
|
|
UINT status; |
79 |
|
|
|
80 |
|
|
/* If trace is enabled, insert this event into the trace buffer. */ |
81 |
|
|
UX_TRACE_IN_LINE_INSERT(UX_TRACE_HOST_STACK_INTERFACE_SETTING_SELECT, interface_ptr, 0, 0, 0, UX_TRACE_HOST_STACK_EVENTS, 0, 0) |
82 |
|
|
|
83 |
|
|
/* Check this alternate setting container. It must be valid before |
84 |
|
|
we continue. */ |
85 |
✓✓ |
168 |
if (interface_ptr -> ux_interface_handle != (ULONG) (ALIGN_TYPE) interface_ptr) |
86 |
|
|
{ |
87 |
|
|
/* If trace is enabled, insert this event into the trace buffer. */ |
88 |
|
|
UX_TRACE_IN_LINE_INSERT(UX_TRACE_ERROR, UX_INTERFACE_HANDLE_UNKNOWN, interface_ptr, 0, 0, UX_TRACE_ERRORS, 0, 0) |
89 |
|
|
|
90 |
|
1 |
return(UX_INTERFACE_HANDLE_UNKNOWN); |
91 |
|
|
} |
92 |
|
|
|
93 |
|
|
/* From the interface, get the configuration container and the first |
94 |
|
|
interface hooked to this configuration. */ |
95 |
|
167 |
configuration = interface_ptr -> ux_interface_configuration; |
96 |
|
167 |
current_interface_number = interface_ptr -> ux_interface_descriptor.bInterfaceNumber; |
97 |
|
167 |
current_interface = configuration -> ux_configuration_first_interface; |
98 |
|
|
|
99 |
|
|
/* Remember the main interface to store the next alternate setting. We set the main interface |
100 |
|
|
to the first interface to keep the compiler happy. */ |
101 |
|
167 |
main_interface = current_interface; |
102 |
|
|
|
103 |
|
|
/* In order to keep the compiler happy, we reset the alternate setting. */ |
104 |
|
167 |
current_alternate_setting = 0; |
105 |
|
167 |
previous_interface = UX_NULL; |
106 |
|
|
|
107 |
|
|
/* Search for the current alternate setting for this interface. |
108 |
|
|
All its endpoints will need to be destroyed. |
109 |
|
|
Since interfaces in the parent configuration should be linked together |
110 |
|
|
in correct way, just find it in while loop. |
111 |
|
|
*/ |
112 |
|
|
while (1) |
113 |
|
|
{ |
114 |
|
|
|
115 |
|
|
/* Try to locate the first interface container in the interface chain which |
116 |
|
|
has the same interface number as the one supplied by the caller. */ |
117 |
✓✓ |
355 |
if (current_interface -> ux_interface_descriptor.bInterfaceNumber == current_interface_number) |
118 |
|
|
{ |
119 |
|
|
|
120 |
|
|
/* The alternate setting 0 of this interface has the current selected |
121 |
|
|
alternate setting. */ |
122 |
✓✓ |
192 |
if (current_interface -> ux_interface_descriptor.bAlternateSetting == 0) |
123 |
|
|
{ |
124 |
|
|
|
125 |
|
|
/* Set the alternate setting. */ |
126 |
|
167 |
current_alternate_setting = current_interface -> ux_interface_current_alternate_setting; |
127 |
|
|
|
128 |
|
|
/* Remember the main interface to store the next alternate setting. */ |
129 |
|
167 |
main_interface = current_interface; |
130 |
|
|
|
131 |
|
|
} |
132 |
|
|
|
133 |
|
|
/* See if the current alternate setting matches that of the interface alternate setting. */ |
134 |
✓✓ |
192 |
if (current_alternate_setting == current_interface -> ux_interface_descriptor.bAlternateSetting) |
135 |
|
|
{ |
136 |
|
|
|
137 |
|
|
/* Yes, save the current alternate setting. */ |
138 |
|
167 |
previous_interface = current_interface; |
139 |
|
|
|
140 |
|
|
/* Then delete the current interface. */ |
141 |
|
167 |
_ux_host_stack_interface_instance_delete(current_interface); |
142 |
|
|
|
143 |
|
|
/* We are done in this loop. */ |
144 |
|
167 |
break; |
145 |
|
|
|
146 |
|
|
} |
147 |
|
|
} |
148 |
|
|
|
149 |
|
|
/* Move to the next interface. */ |
150 |
|
188 |
current_interface = current_interface -> ux_interface_next_interface; |
151 |
|
|
} |
152 |
|
|
|
153 |
|
|
/* Remember the new alternate setting. */ |
154 |
|
167 |
main_interface -> ux_interface_current_alternate_setting = interface_ptr -> ux_interface_descriptor.bAlternateSetting; |
155 |
|
|
|
156 |
|
|
/* Now, the interface must be created with the new alternate setting. */ |
157 |
|
167 |
status = _ux_host_stack_interface_instance_create(interface_ptr); |
158 |
|
|
|
159 |
|
|
/* If we could not create it, we return to the default one. */ |
160 |
✓✓ |
167 |
if (status != UX_SUCCESS) |
161 |
|
|
{ |
162 |
|
|
|
163 |
|
|
/* Then delete the failed interface. */ |
164 |
|
10 |
_ux_host_stack_interface_instance_delete(interface_ptr); |
165 |
|
|
|
166 |
|
|
/* Error, reset the main interface alternate setting to the default. */ |
167 |
|
10 |
main_interface -> ux_interface_current_alternate_setting = current_alternate_setting; |
168 |
|
|
|
169 |
|
|
/* Re-create the previous interface with the old alternate setting. */ |
170 |
|
10 |
_ux_host_stack_interface_instance_create(previous_interface); |
171 |
|
|
|
172 |
|
|
/* Return error status. */ |
173 |
|
10 |
return(status); |
174 |
|
|
} |
175 |
|
|
|
176 |
|
|
/* Protect the control endpoint semaphore here. It will be unprotected in the |
177 |
|
|
transfer request function. */ |
178 |
|
157 |
status = _ux_host_semaphore_get(&configuration -> ux_configuration_device -> ux_device_protection_semaphore, UX_WAIT_FOREVER); |
179 |
✓✓ |
157 |
if (status != UX_SUCCESS) |
180 |
|
1 |
return(status); |
181 |
|
|
|
182 |
|
|
/* Issue a SET_INTERFACE command to the target device. */ |
183 |
|
156 |
status = _ux_host_stack_interface_set(interface_ptr); |
184 |
|
|
|
185 |
|
|
/* Check completion status. */ |
186 |
✓✓ |
156 |
if (status != UX_SUCCESS) |
187 |
|
|
{ |
188 |
|
|
|
189 |
|
|
/* Error, reset the main interface alternate setting to the default. */ |
190 |
|
14 |
main_interface -> ux_interface_current_alternate_setting = current_alternate_setting; |
191 |
|
|
|
192 |
|
|
/* Delete the current interface. */ |
193 |
|
14 |
_ux_host_stack_interface_instance_delete(interface_ptr); |
194 |
|
|
|
195 |
|
|
/* Re-create the previous interface with the old alternate setting. */ |
196 |
|
14 |
_ux_host_stack_interface_instance_create(previous_interface); |
197 |
|
|
|
198 |
|
|
/* Return error status. */ |
199 |
|
14 |
_ux_host_semaphore_put(&configuration -> ux_configuration_device -> ux_device_protection_semaphore); |
200 |
|
14 |
return(status); |
201 |
|
|
} |
202 |
|
|
|
203 |
|
|
/* Return to caller. */ |
204 |
|
142 |
return(status); |
205 |
|
|
} |
206 |
|
|
|
207 |
|
|
|
208 |
|
|
/**************************************************************************/ |
209 |
|
|
/* */ |
210 |
|
|
/* FUNCTION RELEASE */ |
211 |
|
|
/* */ |
212 |
|
|
/* _uxe_host_stack_interface_setting_select PORTABLE C */ |
213 |
|
|
/* 6.3.0 */ |
214 |
|
|
/* AUTHOR */ |
215 |
|
|
/* */ |
216 |
|
|
/* Chaoqiong Xiao, Microsoft Corporation */ |
217 |
|
|
/* */ |
218 |
|
|
/* DESCRIPTION */ |
219 |
|
|
/* */ |
220 |
|
|
/* This function checks errors in host stack interface select function */ |
221 |
|
|
/* call. */ |
222 |
|
|
/* */ |
223 |
|
|
/* INPUT */ |
224 |
|
|
/* */ |
225 |
|
|
/* interface_ptr Pointer to interface */ |
226 |
|
|
/* */ |
227 |
|
|
/* OUTPUT */ |
228 |
|
|
/* */ |
229 |
|
|
/* None */ |
230 |
|
|
/* */ |
231 |
|
|
/* CALLS */ |
232 |
|
|
/* */ |
233 |
|
|
/* _ux_host_stack_interface_setting_select */ |
234 |
|
|
/* Interface setting select */ |
235 |
|
|
/* */ |
236 |
|
|
/* CALLED BY */ |
237 |
|
|
/* */ |
238 |
|
|
/* Application */ |
239 |
|
|
/* */ |
240 |
|
|
/**************************************************************************/ |
241 |
|
|
UINT _uxe_host_stack_interface_setting_select(UX_INTERFACE *interface_ptr) |
242 |
|
|
{ |
243 |
|
|
|
244 |
|
|
/* Sanity check. */ |
245 |
|
|
if (interface_ptr == UX_NULL) |
246 |
|
|
return(UX_INVALID_PARAMETER); |
247 |
|
|
|
248 |
|
|
/* Invoke interface setting select function. */ |
249 |
|
|
return(_ux_host_stack_interface_setting_select(interface_ptr)); |
250 |
|
|
} |