1 |
|
|
/*************************************************************************** |
2 |
|
|
* Copyright (c) 2024 Microsoft Corporation |
3 |
|
|
* |
4 |
|
|
* This program and the accompanying materials are made available under the |
5 |
|
|
* terms of the MIT License which is available at |
6 |
|
|
* https://opensource.org/licenses/MIT. |
7 |
|
|
* |
8 |
|
|
* SPDX-License-Identifier: MIT |
9 |
|
|
**************************************************************************/ |
10 |
|
|
|
11 |
|
|
/**************************************************************************/ |
12 |
|
|
/**************************************************************************/ |
13 |
|
|
/** */ |
14 |
|
|
/** USBX Component */ |
15 |
|
|
/** */ |
16 |
|
|
/** Device CDC Class */ |
17 |
|
|
/** */ |
18 |
|
|
/**************************************************************************/ |
19 |
|
|
/**************************************************************************/ |
20 |
|
|
|
21 |
|
|
#define UX_SOURCE_CODE |
22 |
|
|
|
23 |
|
|
|
24 |
|
|
/* Include necessary system files. */ |
25 |
|
|
|
26 |
|
|
#include "ux_api.h" |
27 |
|
|
#include "ux_device_class_cdc_acm.h" |
28 |
|
|
#include "ux_device_stack.h" |
29 |
|
|
|
30 |
|
|
|
31 |
|
|
#if !defined(UX_DEVICE_STANDALONE) |
32 |
|
|
/**************************************************************************/ |
33 |
|
|
/* */ |
34 |
|
|
/* FUNCTION RELEASE */ |
35 |
|
|
/* */ |
36 |
|
|
/* _ux_device_class_cdc_acm_write PORTABLE C */ |
37 |
|
|
/* 6.3.0 */ |
38 |
|
|
/* AUTHOR */ |
39 |
|
|
/* */ |
40 |
|
|
/* Chaoqiong Xiao, Microsoft Corporation */ |
41 |
|
|
/* */ |
42 |
|
|
/* DESCRIPTION */ |
43 |
|
|
/* */ |
44 |
|
|
/* This function writes to the CDC class. */ |
45 |
|
|
/* */ |
46 |
|
|
/* It's for RTOS mode. */ |
47 |
|
|
/* */ |
48 |
|
|
/* INPUT */ |
49 |
|
|
/* */ |
50 |
|
|
/* cdc_acm Address of cdc_acm class */ |
51 |
|
|
/* instance */ |
52 |
|
|
/* buffer Pointer to data to write */ |
53 |
|
|
/* requested_length Length of bytes to write, */ |
54 |
|
|
/* set to 0 to issue ZLP */ |
55 |
|
|
/* actual_length Pointer to save number of */ |
56 |
|
|
/* bytes written */ |
57 |
|
|
/* */ |
58 |
|
|
/* OUTPUT */ |
59 |
|
|
/* */ |
60 |
|
|
/* None */ |
61 |
|
|
/* */ |
62 |
|
|
/* CALLS */ |
63 |
|
|
/* */ |
64 |
|
|
/* _ux_utility_memory_copy Copy memory */ |
65 |
|
|
/* _ux_device_stack_transfer_request Transfer request */ |
66 |
|
|
/* _ux_device_mutex_on Take Mutex */ |
67 |
|
|
/* _ux_device_mutex_off Release Mutex */ |
68 |
|
|
/* */ |
69 |
|
|
/* CALLED BY */ |
70 |
|
|
/* */ |
71 |
|
|
/* Application */ |
72 |
|
|
/* */ |
73 |
|
|
/* RELEASE HISTORY */ |
74 |
|
|
/* */ |
75 |
|
|
/* DATE NAME DESCRIPTION */ |
76 |
|
|
/* */ |
77 |
|
|
/* 05-19-2020 Chaoqiong Xiao Initial Version 6.0 */ |
78 |
|
|
/* 09-30-2020 Chaoqiong Xiao Modified comment(s), */ |
79 |
|
|
/* verified memset and memcpy */ |
80 |
|
|
/* cases, */ |
81 |
|
|
/* resulting in version 6.1 */ |
82 |
|
|
/* 10-15-2021 Chaoqiong Xiao Modified comment(s), */ |
83 |
|
|
/* fixed compile issue, */ |
84 |
|
|
/* resulting in version 6.1.9 */ |
85 |
|
|
/* 01-31-2022 Chaoqiong Xiao Modified comment(s), */ |
86 |
|
|
/* resulting in version 6.1.10 */ |
87 |
|
|
/* 04-25-2022 Chaoqiong Xiao Modified comment(s), */ |
88 |
|
|
/* resulting in version 6.1.11 */ |
89 |
|
|
/* 07-29-2022 Chaoqiong Xiao Modified comment(s), */ |
90 |
|
|
/* fixed parameter/variable */ |
91 |
|
|
/* names conflict C++ keyword, */ |
92 |
|
|
/* added auto ZLP support, */ |
93 |
|
|
/* resulting in version 6.1.12 */ |
94 |
|
|
/* 10-31-2023 Yajun Xia, CQ Xiao Modified comment(s), */ |
95 |
|
|
/* added zero copy support, */ |
96 |
|
|
/* added a new mode to manage */ |
97 |
|
|
/* endpoint buffer in classes, */ |
98 |
|
|
/* resulting in version 6.3.0 */ |
99 |
|
|
/* */ |
100 |
|
|
/**************************************************************************/ |
101 |
|
32 |
UINT _ux_device_class_cdc_acm_write(UX_SLAVE_CLASS_CDC_ACM *cdc_acm, UCHAR *buffer, |
102 |
|
|
ULONG requested_length, ULONG *actual_length) |
103 |
|
|
{ |
104 |
|
|
|
105 |
|
|
UX_SLAVE_ENDPOINT *endpoint; |
106 |
|
|
UX_SLAVE_DEVICE *device; |
107 |
|
|
UX_SLAVE_INTERFACE *interface_ptr; |
108 |
|
|
UX_SLAVE_TRANSFER *transfer_request; |
109 |
|
|
ULONG local_requested_length; |
110 |
|
|
ULONG local_host_length; |
111 |
|
32 |
UINT status = 0; |
112 |
|
|
|
113 |
|
|
/* If trace is enabled, insert this event into the trace buffer. */ |
114 |
|
|
UX_TRACE_IN_LINE_INSERT(UX_TRACE_DEVICE_CLASS_CDC_ACM_WRITE, cdc_acm, buffer, requested_length, 0, UX_TRACE_DEVICE_CLASS_EVENTS, 0, 0) |
115 |
|
|
|
116 |
|
|
#ifndef UX_DEVICE_CLASS_CDC_ACM_TRANSMISSION_DISABLE |
117 |
|
|
|
118 |
|
|
/* Check if current cdc-acm is using callback or not. We cannot use direct reads with callback on. */ |
119 |
✓✓ |
32 |
if (cdc_acm -> ux_slave_class_cdc_acm_transmission_status == UX_TRUE) |
120 |
|
|
|
121 |
|
|
/* Not allowed. */ |
122 |
|
1 |
return(UX_ERROR); |
123 |
|
|
#endif |
124 |
|
|
|
125 |
|
|
/* Get the pointer to the device. */ |
126 |
|
31 |
device = &_ux_system_slave -> ux_system_slave_device; |
127 |
|
|
|
128 |
|
|
/* As long as the device is in the CONFIGURED state. */ |
129 |
✓✓ |
31 |
if (device -> ux_slave_device_state != UX_DEVICE_CONFIGURED) |
130 |
|
|
{ |
131 |
|
|
|
132 |
|
|
/* Error trap. */ |
133 |
|
1 |
_ux_system_error_handler(UX_SYSTEM_LEVEL_THREAD, UX_SYSTEM_CONTEXT_CLASS, UX_CONFIGURATION_HANDLE_UNKNOWN); |
134 |
|
|
|
135 |
|
|
/* If trace is enabled, insert this event into the trace buffer. */ |
136 |
|
|
UX_TRACE_IN_LINE_INSERT(UX_TRACE_ERROR, UX_CONFIGURATION_HANDLE_UNKNOWN, device, 0, 0, UX_TRACE_ERRORS, 0, 0) |
137 |
|
|
|
138 |
|
|
/* Cannot proceed with command, the interface is down. */ |
139 |
|
1 |
return(UX_CONFIGURATION_HANDLE_UNKNOWN); |
140 |
|
|
} |
141 |
|
|
|
142 |
|
|
/* We need the interface to the class. */ |
143 |
|
30 |
interface_ptr = cdc_acm -> ux_slave_class_cdc_acm_interface; |
144 |
|
|
|
145 |
|
|
/* Locate the endpoints. */ |
146 |
|
30 |
endpoint = interface_ptr -> ux_slave_interface_first_endpoint; |
147 |
|
|
|
148 |
|
|
/* Check the endpoint direction, if IN we have the correct endpoint. */ |
149 |
✓✓ |
30 |
if ((endpoint -> ux_slave_endpoint_descriptor.bEndpointAddress & UX_ENDPOINT_DIRECTION) != UX_ENDPOINT_IN) |
150 |
|
|
{ |
151 |
|
|
|
152 |
|
|
/* So the next endpoint has to be the IN endpoint. */ |
153 |
|
13 |
endpoint = endpoint -> ux_slave_endpoint_next_endpoint; |
154 |
|
|
} |
155 |
|
|
|
156 |
|
|
/* Protect this thread. */ |
157 |
|
30 |
_ux_device_mutex_on(&cdc_acm -> ux_slave_class_cdc_acm_endpoint_in_mutex); |
158 |
|
|
|
159 |
|
|
/* We are writing to the IN endpoint. */ |
160 |
|
30 |
transfer_request = &endpoint -> ux_slave_endpoint_transfer_request; |
161 |
|
|
|
162 |
|
|
#if UX_DEVICE_ENDPOINT_BUFFER_OWNER == 1 |
163 |
|
|
#if !defined(UX_DEVICE_CLASS_CDC_ACM_ZERO_COPY) |
164 |
|
|
transfer_request -> ux_slave_transfer_request_data_pointer = |
165 |
|
|
UX_DEVICE_CLASS_CDC_ACM_WRITE_BUFFER(cdc_acm); |
166 |
|
|
#else |
167 |
|
|
transfer_request -> ux_slave_transfer_request_data_pointer = buffer; |
168 |
|
|
#endif |
169 |
|
|
#endif |
170 |
|
|
|
171 |
|
|
/* Reset the actual length. */ |
172 |
|
30 |
*actual_length = 0; |
173 |
|
|
|
174 |
|
|
/* Check if the application forces a 0 length packet. */ |
175 |
✓✓✓✓
|
30 |
if (device -> ux_slave_device_state == UX_DEVICE_CONFIGURED && requested_length == 0) |
176 |
|
|
{ |
177 |
|
|
|
178 |
|
|
/* Send the request for 0 byte packet to the device controller. */ |
179 |
|
2 |
status = _ux_device_stack_transfer_request(transfer_request, 0, 0); |
180 |
|
|
|
181 |
|
|
/* Free Mutex resource. */ |
182 |
|
2 |
_ux_device_mutex_off(&cdc_acm -> ux_slave_class_cdc_acm_endpoint_in_mutex); |
183 |
|
|
|
184 |
|
|
/* Return the status. */ |
185 |
|
2 |
return(status); |
186 |
|
|
|
187 |
|
|
|
188 |
|
|
} |
189 |
|
|
else |
190 |
|
|
{ |
191 |
|
|
|
192 |
|
|
#if (UX_DEVICE_ENDPOINT_BUFFER_OWNER == 1) && defined(UX_DEVICE_CLASS_CDC_ACM_ZERO_COPY) |
193 |
|
|
|
194 |
|
|
/* Check if device is configured. */ |
195 |
|
|
if (device -> ux_slave_device_state == UX_DEVICE_CONFIGURED) |
196 |
|
|
{ |
197 |
|
|
|
198 |
|
|
#if defined(UX_DEVICE_CLASS_CDC_ACM_WRITE_AUTO_ZLP) |
199 |
|
|
|
200 |
|
|
/* Issue with larger host length to append zlp if necessary. */ |
201 |
|
|
local_host_length = requested_length + 1; |
202 |
|
|
#else |
203 |
|
|
local_host_length = requested_length; |
204 |
|
|
#endif |
205 |
|
|
local_requested_length = requested_length; |
206 |
|
|
|
207 |
|
|
/* Issue the transfer request. */ |
208 |
|
|
status = _ux_device_stack_transfer_request(transfer_request, local_requested_length, local_host_length); |
209 |
|
|
if (status == UX_SUCCESS) |
210 |
|
|
*actual_length = transfer_request -> ux_slave_transfer_request_actual_length; |
211 |
|
|
} |
212 |
|
|
#else |
213 |
|
|
|
214 |
|
|
/* Check if we need more transactions. */ |
215 |
|
28 |
local_host_length = UX_DEVICE_CLASS_CDC_ACM_WRITE_BUFFER_SIZE; |
216 |
✓✓✓✓
|
58 |
while (device -> ux_slave_device_state == UX_DEVICE_CONFIGURED && requested_length != 0) |
217 |
|
|
{ |
218 |
|
|
|
219 |
|
|
/* Check if we have enough in the local buffer. */ |
220 |
✓✓ |
33 |
if (requested_length > UX_DEVICE_CLASS_CDC_ACM_WRITE_BUFFER_SIZE) |
221 |
|
|
|
222 |
|
|
/* We have too much to transfer. */ |
223 |
|
7 |
local_requested_length = UX_DEVICE_CLASS_CDC_ACM_WRITE_BUFFER_SIZE; |
224 |
|
|
|
225 |
|
|
else |
226 |
|
|
{ |
227 |
|
|
|
228 |
|
|
/* We can proceed with the demanded length. */ |
229 |
|
26 |
local_requested_length = requested_length; |
230 |
|
|
|
231 |
|
|
#if !defined(UX_DEVICE_CLASS_CDC_ACM_WRITE_AUTO_ZLP) |
232 |
|
|
|
233 |
|
|
/* Assume the length match expectation. */ |
234 |
|
26 |
local_host_length = requested_length; |
235 |
|
|
#else |
236 |
|
|
|
237 |
|
|
/* Assume expecting more, so ZLP is appended in stack. */ |
238 |
|
|
local_host_length = UX_DEVICE_CLASS_CDC_ACM_WRITE_BUFFER_SIZE + 1; |
239 |
|
|
#endif |
240 |
|
|
} |
241 |
|
|
|
242 |
|
|
/* On a out, we copy the buffer to the caller. Not very efficient but it makes the API |
243 |
|
|
easier. */ |
244 |
|
33 |
_ux_utility_memory_copy(transfer_request -> ux_slave_transfer_request_data_pointer, |
245 |
|
|
buffer, local_requested_length); /* Use case of memcpy is verified. */ |
246 |
|
|
|
247 |
|
|
/* Send the request to the device controller. */ |
248 |
|
33 |
status = _ux_device_stack_transfer_request(transfer_request, local_requested_length, local_host_length); |
249 |
|
|
|
250 |
|
|
/* Check the status */ |
251 |
✓✓ |
33 |
if (status == UX_SUCCESS) |
252 |
|
|
{ |
253 |
|
|
|
254 |
|
|
/* Next buffer address. */ |
255 |
|
30 |
buffer += transfer_request -> ux_slave_transfer_request_actual_length; |
256 |
|
|
|
257 |
|
|
/* Set the length actually received. */ |
258 |
|
30 |
*actual_length += transfer_request -> ux_slave_transfer_request_actual_length; |
259 |
|
|
|
260 |
|
|
/* Decrement what left has to be done. */ |
261 |
|
30 |
requested_length -= transfer_request -> ux_slave_transfer_request_actual_length; |
262 |
|
|
|
263 |
|
|
} |
264 |
|
|
|
265 |
|
|
else |
266 |
|
|
{ |
267 |
|
|
|
268 |
|
|
/* Free Mutex resource. */ |
269 |
|
3 |
_ux_device_mutex_off(&cdc_acm -> ux_slave_class_cdc_acm_endpoint_in_mutex); |
270 |
|
|
|
271 |
|
|
/* We had an error, abort. */ |
272 |
|
3 |
return(status); |
273 |
|
|
} |
274 |
|
|
} |
275 |
|
|
#endif /* _BUFF_OWNER && _ZERO_COPY */ |
276 |
|
|
} |
277 |
|
|
|
278 |
|
|
|
279 |
|
|
/* Free Mutex resource. */ |
280 |
|
25 |
_ux_device_mutex_off(&cdc_acm -> ux_slave_class_cdc_acm_endpoint_in_mutex); |
281 |
|
|
|
282 |
|
|
/* Check why we got here, either completion or device was extracted. */ |
283 |
✓✓ |
25 |
if (device -> ux_slave_device_state != UX_DEVICE_CONFIGURED) |
284 |
|
|
{ |
285 |
|
|
|
286 |
|
|
/* Error trap. */ |
287 |
|
2 |
_ux_system_error_handler(UX_SYSTEM_LEVEL_THREAD, UX_SYSTEM_CONTEXT_CLASS, UX_TRANSFER_NO_ANSWER); |
288 |
|
|
|
289 |
|
|
/* If trace is enabled, insert this event into the trace buffer. */ |
290 |
|
|
UX_TRACE_IN_LINE_INSERT(UX_TRACE_ERROR, UX_TRANSFER_NO_ANSWER, transfer_request, 0, 0, UX_TRACE_ERRORS, 0, 0) |
291 |
|
|
|
292 |
|
|
/* Device must have been extracted. */ |
293 |
|
2 |
return (UX_TRANSFER_NO_ANSWER); |
294 |
|
|
} |
295 |
|
|
else |
296 |
|
|
|
297 |
|
|
/* Simply return the last transaction result. */ |
298 |
|
23 |
return(status); |
299 |
|
|
|
300 |
|
|
} |
301 |
|
|
|
302 |
|
|
/**************************************************************************/ |
303 |
|
|
/* */ |
304 |
|
|
/* FUNCTION RELEASE */ |
305 |
|
|
/* */ |
306 |
|
|
/* _uxe_device_class_cdc_acm_write PORTABLE C */ |
307 |
|
|
/* 6.3.0 */ |
308 |
|
|
/* AUTHOR */ |
309 |
|
|
/* */ |
310 |
|
|
/* Yajun Xia, Microsoft Corporation */ |
311 |
|
|
/* */ |
312 |
|
|
/* DESCRIPTION */ |
313 |
|
|
/* */ |
314 |
|
|
/* This function checks errors in CDC ACM class write function. */ |
315 |
|
|
/* */ |
316 |
|
|
/* INPUT */ |
317 |
|
|
/* */ |
318 |
|
|
/* cdc_acm Address of cdc_acm class */ |
319 |
|
|
/* instance */ |
320 |
|
|
/* buffer Pointer to data to write */ |
321 |
|
|
/* requested_length Length of bytes to write, */ |
322 |
|
|
/* set to 0 to issue ZLP */ |
323 |
|
|
/* actual_length Pointer to save number of */ |
324 |
|
|
/* bytes written */ |
325 |
|
|
/* */ |
326 |
|
|
/* OUTPUT */ |
327 |
|
|
/* */ |
328 |
|
|
/* None */ |
329 |
|
|
/* */ |
330 |
|
|
/* CALLS */ |
331 |
|
|
/* */ |
332 |
|
|
/* _ux_device_class_cdc_acm_write CDC ACM class write function */ |
333 |
|
|
/* */ |
334 |
|
|
/* CALLED BY */ |
335 |
|
|
/* */ |
336 |
|
|
/* Application */ |
337 |
|
|
/* */ |
338 |
|
|
/* RELEASE HISTORY */ |
339 |
|
|
/* */ |
340 |
|
|
/* DATE NAME DESCRIPTION */ |
341 |
|
|
/* */ |
342 |
|
|
/* 10-31-2023 Yajun Xia Initial Version 6.3.0 */ |
343 |
|
|
/* */ |
344 |
|
|
/**************************************************************************/ |
345 |
|
|
UINT _uxe_device_class_cdc_acm_write(UX_SLAVE_CLASS_CDC_ACM *cdc_acm, UCHAR *buffer, |
346 |
|
|
ULONG requested_length, ULONG *actual_length) |
347 |
|
|
{ |
348 |
|
|
|
349 |
|
|
/* Sanity checks. */ |
350 |
|
|
if ((cdc_acm == UX_NULL) || ((buffer == UX_NULL) && (requested_length > 0)) || (actual_length == UX_NULL)) |
351 |
|
|
{ |
352 |
|
|
return (UX_INVALID_PARAMETER); |
353 |
|
|
} |
354 |
|
|
|
355 |
|
|
return (_ux_device_class_cdc_acm_write(cdc_acm, buffer, requested_length, actual_length)); |
356 |
|
|
} |
357 |
|
|
|
358 |
|
|
#endif |