1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
|
/*
* The MIT License (MIT)
*
* Copyright (c) 2019 Ha Thach (tinyusb.org)
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*
* This file is part of the TinyUSB stack.
*/
#include "tusb_option.h"
#if TUSB_OPT_DEVICE_ENABLED
#include "tusb.h"
#include "device/usbd_pvt.h"
#include "dcd.h"
#if CFG_TUSB_DEBUG >= 2
extern void usbd_driver_print_control_complete_name(usbd_control_xfer_cb_t callback);
#endif
enum
{
EDPT_CTRL_OUT = 0x00,
EDPT_CTRL_IN = 0x80
};
typedef struct
{
tusb_control_request_t request;
uint8_t* buffer;
uint16_t data_len;
uint16_t total_xferred;
usbd_control_xfer_cb_t complete_cb;
} usbd_control_xfer_t;
static usbd_control_xfer_t _ctrl_xfer;
CFG_TUSB_MEM_SECTION CFG_TUSB_MEM_ALIGN
static uint8_t _usbd_ctrl_buf[CFG_TUD_ENDPOINT0_SIZE];
//--------------------------------------------------------------------+
// Application API
//--------------------------------------------------------------------+
// Queue ZLP status transaction
static inline bool _status_stage_xact(uint8_t rhport, tusb_control_request_t const * request)
{
// Opposite to endpoint in Data Phase
uint8_t const ep_addr = request->bmRequestType_bit.direction ? EDPT_CTRL_OUT : EDPT_CTRL_IN;
return usbd_edpt_xfer(rhport, ep_addr, NULL, 0);
}
// Status phase
bool tud_control_status(uint8_t rhport, tusb_control_request_t const * request)
{
_ctrl_xfer.request = (*request);
_ctrl_xfer.buffer = NULL;
_ctrl_xfer.total_xferred = 0;
_ctrl_xfer.data_len = 0;
return _status_stage_xact(rhport, request);
}
// Queue a transaction in Data Stage
// Each transaction has up to Endpoint0's max packet size.
// This function can also transfer an zero-length packet
static bool _data_stage_xact(uint8_t rhport)
{
uint16_t const xact_len = tu_min16(_ctrl_xfer.data_len - _ctrl_xfer.total_xferred, CFG_TUD_ENDPOINT0_SIZE);
uint8_t ep_addr = EDPT_CTRL_OUT;
if ( _ctrl_xfer.request.bmRequestType_bit.direction == TUSB_DIR_IN )
{
ep_addr = EDPT_CTRL_IN;
if ( xact_len ) memcpy(_usbd_ctrl_buf, _ctrl_xfer.buffer, xact_len);
}
return usbd_edpt_xfer(rhport, ep_addr, xact_len ? _usbd_ctrl_buf : NULL, xact_len);
}
// Transmit data to/from the control endpoint.
// If the request's wLength is zero, a status packet is sent instead.
bool tud_control_xfer(uint8_t rhport, tusb_control_request_t const * request, void* buffer, uint16_t len)
{
_ctrl_xfer.request = (*request);
_ctrl_xfer.buffer = (uint8_t*) buffer;
_ctrl_xfer.total_xferred = 0U;
_ctrl_xfer.data_len = tu_min16(len, request->wLength);
if (request->wLength > 0U)
{
if(_ctrl_xfer.data_len > 0U)
{
TU_ASSERT(buffer);
}
// TU_LOG2(" Control total data length is %u bytes\r\n", _ctrl_xfer.data_len);
// Data stage
TU_ASSERT( _data_stage_xact(rhport) );
}
else
{
// Status stage
TU_ASSERT( _status_stage_xact(rhport, request) );
}
return true;
}
//--------------------------------------------------------------------+
// USBD API
//--------------------------------------------------------------------+
void usbd_control_reset(void);
void usbd_control_set_request(tusb_control_request_t const *request);
void usbd_control_set_complete_callback( usbd_control_xfer_cb_t fp );
bool usbd_control_xfer_cb (uint8_t rhport, uint8_t ep_addr, xfer_result_t event, uint32_t xferred_bytes);
void usbd_control_reset(void)
{
tu_varclr(&_ctrl_xfer);
}
// Set complete callback
void usbd_control_set_complete_callback( usbd_control_xfer_cb_t fp )
{
_ctrl_xfer.complete_cb = fp;
}
// for dcd_set_address where DCD is responsible for status response
void usbd_control_set_request(tusb_control_request_t const *request)
{
_ctrl_xfer.request = (*request);
_ctrl_xfer.buffer = NULL;
_ctrl_xfer.total_xferred = 0;
_ctrl_xfer.data_len = 0;
}
// callback when a transaction complete on
// - DATA stage of control endpoint or
// - Status stage
bool usbd_control_xfer_cb (uint8_t rhport, uint8_t ep_addr, xfer_result_t result, uint32_t xferred_bytes)
{
(void) result;
// Endpoint Address is opposite to direction bit, this is Status Stage complete event
if ( tu_edpt_dir(ep_addr) != _ctrl_xfer.request.bmRequestType_bit.direction )
{
TU_ASSERT(0 == xferred_bytes);
// invoke optional dcd hook if available
if (dcd_edpt0_status_complete) dcd_edpt0_status_complete(rhport, &_ctrl_xfer.request);
if (_ctrl_xfer.complete_cb)
{
// TODO refactor with usbd_driver_print_control_complete_name
_ctrl_xfer.complete_cb(rhport, CONTROL_STAGE_ACK, &_ctrl_xfer.request);
}
return true;
}
if ( _ctrl_xfer.request.bmRequestType_bit.direction == TUSB_DIR_OUT )
{
TU_VERIFY(_ctrl_xfer.buffer);
memcpy(_ctrl_xfer.buffer, _usbd_ctrl_buf, xferred_bytes);
TU_LOG_MEM(2, _usbd_ctrl_buf, xferred_bytes, 2);
}
_ctrl_xfer.total_xferred += xferred_bytes;
_ctrl_xfer.buffer += xferred_bytes;
// Data Stage is complete when all request's length are transferred or
// a short packet is sent including zero-length packet.
if ( (_ctrl_xfer.request.wLength == _ctrl_xfer.total_xferred) || (xferred_bytes < CFG_TUD_ENDPOINT0_SIZE) )
{
// DATA stage is complete
bool is_ok = true;
// invoke complete callback if set
// callback can still stall control in status phase e.g out data does not make sense
if ( _ctrl_xfer.complete_cb )
{
#if CFG_TUSB_DEBUG >= 2
usbd_driver_print_control_complete_name(_ctrl_xfer.complete_cb);
#endif
is_ok = _ctrl_xfer.complete_cb(rhport, CONTROL_STAGE_DATA, &_ctrl_xfer.request);
}
if ( is_ok )
{
// Send status
TU_ASSERT( _status_stage_xact(rhport, &_ctrl_xfer.request) );
}else
{
// Stall both IN and OUT control endpoint
dcd_edpt_stall(rhport, EDPT_CTRL_OUT);
dcd_edpt_stall(rhport, EDPT_CTRL_IN);
}
}
else
{
// More data to transfer
TU_ASSERT( _data_stage_xact(rhport) );
}
return true;
}
#endif
|
