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Device side USB implementation:
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1/*\r
2 * at91sam7s USB CDC device implementation\r
3 *\r
4 * Copyright (c) 2012, Roel Verdult\r
5 * All rights reserved.\r
6 *\r
7 * Redistribution and use in source and binary forms, with or without\r
8 * modification, are permitted provided that the following conditions are met:\r
9 * 1. Redistributions of source code must retain the above copyright\r
10 * notice, this list of conditions and the following disclaimer.\r
11 * 2. Redistributions in binary form must reproduce the above copyright\r
12 * notice, this list of conditions and the following disclaimer in the\r
13 * documentation and/or other materials provided with the distribution.\r
14 * 3. Neither the name of the copyright holders nor the\r
15 * names of its contributors may be used to endorse or promote products\r
16 * derived from this software without specific prior written permission.\r
17 *\r
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ''AS IS'' AND ANY\r
19 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED\r
20 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE\r
21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY\r
22 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES\r
23 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;\r
24 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND\r
25 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT\r
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS\r
27 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.\r
28 *\r
29 * based on the "Basic USB Example" from ATMEL (doc6123.pdf)\r
30 *\r
31 * @file usb_cdc.c\r
32 * @brief\r
33 */\r
34\r
35#include "usb_cdc.h"\r
36#include "at91sam7s512.h"\r
37#include "config_gpio.h"\r
38\r
39\r
40#define AT91C_EP_CONTROL 0\r
41#define AT91C_EP_OUT 1\r
42#define AT91C_EP_IN 2\r
43#define AT91C_EP_NOTIFY 3\r
44#define AT91C_EP_OUT_SIZE 0x40\r
45#define AT91C_EP_IN_SIZE 0x40\r
46\r
47static const char devDescriptor[] = {\r
48 /* Device descriptor */\r
49 0x12, // bLength\r
50 0x01, // bDescriptorType\r
51 0x00,0x02, // Complies with USB Spec. Release (0200h = release 2.0)\r
52 0x02, // bDeviceClass: (Communication Device Class)\r
53 0x00, // bDeviceSubclass: (unused at this time)\r
54 0x00, // bDeviceProtocol: (unused at this time)\r
55 0x08, // bMaxPacketSize0\r
56 0xc4,0x9a, // Vendor ID (0x9ac4 = J. Westhues)\r
57 0x8f,0x4b, // Product ID (0x4b8f = Proxmark-3 RFID Instrument)\r
58 0x01,0x00, // Device release number (0001)\r
59 0x01, // iManufacturer\r
60 0x02, // iProduct\r
61 0x00, // iSerialNumber\r
62 0x01 // bNumConfigs\r
63};\r
64\r
65static const char cfgDescriptor[] = {\r
66 /* ============== CONFIGURATION 1 =========== */\r
67 /* Configuration 1 descriptor */\r
68 0x09, // CbLength\r
69 0x02, // CbDescriptorType\r
70 0x43, // CwTotalLength 2 EP + Control\r
71 0x00,\r
72 0x02, // CbNumInterfaces\r
73 0x01, // CbConfigurationValue\r
74 0x00, // CiConfiguration\r
75 0xC0, // CbmAttributes 0xA0\r
76 0xFA, // CMaxPower\r
77\r
78 /* Interface 0 Descriptor: Communication Class Interface */\r
79 0x09, // bLength\r
80 0x04, // bDescriptorType\r
81 0x00, // bInterfaceNumber\r
82 0x00, // bAlternateSetting\r
83 0x01, // bNumEndpoints\r
84 0x02, // bInterfaceClass: Communication Interface Class\r
85 0x02, // bInterfaceSubclass: Abstract Control Model\r
86 0x01, // bInterfaceProtocol: Common AT Commands, V.25ter\r
87 0x00, // iInterface\r
88\r
89 /* Header Functional Descriptor */\r
90 0x05, // bFunction Length\r
91 0x24, // bDescriptor type: CS_INTERFACE\r
92 0x00, // bDescriptor subtype: Header Functional Descriptor\r
93 0x10, // bcdCDC:1.1\r
94 0x01,\r
95\r
96 /* ACM Functional Descriptor */\r
97 0x04, // bFunctionLength\r
98 0x24, // bDescriptor Type: CS_INTERFACE\r
99 0x02, // bDescriptor Subtype: Abstract Control Management Functional Descriptor\r
100 0x02, // bmCapabilities: D1: Device supports the request combination of Set_Line_Coding, Set_Control_Line_State, Get_Line_Coding, and the notification Serial_State\r
101\r
102 /* Union Functional Descriptor */\r
103 0x05, // bFunctionLength\r
104 0x24, // bDescriptorType: CS_INTERFACE\r
105 0x06, // bDescriptor Subtype: Union Functional Descriptor\r
106 0x00, // bMasterInterface: Communication Class Interface\r
107 0x01, // bSlaveInterface0: Data Class Interface\r
108\r
109 /* Call Management Functional Descriptor */\r
110 0x05, // bFunctionLength\r
111 0x24, // bDescriptor Type: CS_INTERFACE\r
112 0x01, // bDescriptor Subtype: Call Management Functional Descriptor\r
113 0x00, // bmCapabilities: Device sends/receives call management information only over the Communication Class interface. Device does not handle call management itself\r
114 0x01, // bDataInterface: Data Class Interface 1\r
115\r
116 /* Endpoint 1 descriptor */\r
117 0x07, // bLength\r
118 0x05, // bDescriptorType\r
119 0x83, // bEndpointAddress: Endpoint 03 - IN\r
120 0x03, // bmAttributes: INT\r
121 0x08, // wMaxPacketSize: 8\r
122 0x00,\r
123 0xFF, // bInterval\r
124\r
125 /* Interface 1 Descriptor: Data Class Interface */\r
126 0x09, // bLength\r
127 0x04, // bDescriptorType\r
128 0x01, // bInterfaceNumber\r
129 0x00, // bAlternateSetting\r
130 0x02, // bNumEndpoints\r
131 0x0A, // bInterfaceClass: Data Interface Class\r
132 0x00, // bInterfaceSubclass: not used\r
133 0x00, // bInterfaceProtocol: No class specific protocol required)\r
134 0x00, // iInterface\r
135\r
136 /* Endpoint 1 descriptor */\r
137 0x07, // bLength\r
138 0x05, // bDescriptorType\r
139 0x01, // bEndpointAddress: Endpoint 01 - OUT\r
140 0x02, // bmAttributes: BULK\r
141 AT91C_EP_OUT_SIZE, // wMaxPacketSize\r
142 0x00,\r
143 0x00, // bInterval\r
144\r
145 /* Endpoint 2 descriptor */\r
146 0x07, // bLength\r
147 0x05, // bDescriptorType\r
148 0x82, // bEndpointAddress: Endpoint 02 - IN\r
149 0x02, // bmAttributes: BULK\r
150 AT91C_EP_IN_SIZE, // wMaxPacketSize\r
151 0x00,\r
152 0x00 // bInterval\r
153};\r
154\r
155static const char StrDescLanguageCodes[] = {\r
156 4, // Length\r
157 0x03, // Type is string\r
158 0x09, 0x04 // supported language Code 0 = 0x0409 (English)\r
159};\r
160 \r
161static const char StrDescManufacturer[] = {\r
162 26, // Length\r
163 0x03, // Type is string\r
164 'p', 0x00,\r
165 'r', 0x00,\r
166 'o', 0x00,\r
167 'x', 0x00,\r
168 'm', 0x00,\r
169 'a', 0x00,\r
170 'r', 0x00,\r
171 'k', 0x00,\r
172 '.', 0x00,\r
173 'o', 0x00,\r
174 'r', 0x00,\r
175 'g', 0x00\r
176};\r
177\r
178static const char StrDescProduct[] = {\r
179 8, // Length\r
180 0x03, // Type is string\r
181 'P', 0x00,\r
182 'M', 0x00,\r
183 '3', 0x00\r
184};\r
185 \r
186static const char* const pStrings[] =\r
187{\r
188 StrDescLanguageCodes,\r
189 StrDescManufacturer,\r
190 StrDescProduct\r
191};\r
192\r
193const char* getStringDescriptor(uint8_t idx)\r
194{\r
195 if(idx >= (sizeof(pStrings) / sizeof(pStrings[0]))) {\r
196 return(NULL);\r
197 } else {\r
198 return(pStrings[idx]);\r
199 }\r
200}\r
201\r
202// Bitmap for all status bits in CSR which must be written as 1 to cause no effect\r
203#define REG_NO_EFFECT_1_ALL AT91C_UDP_RX_DATA_BK0 | AT91C_UDP_RX_DATA_BK1 \\r
204 |AT91C_UDP_STALLSENT | AT91C_UDP_RXSETUP \\r
205 |AT91C_UDP_TXCOMP\r
206\r
207// Clear flags in the UDP_CSR register\r
208#define UDP_CLEAR_EP_FLAGS(endpoint, flags) { \\r
209 volatile unsigned int reg; \\r
210 reg = pUdp->UDP_CSR[(endpoint)]; \\r
211 reg |= REG_NO_EFFECT_1_ALL; \\r
212 reg &= ~(flags); \\r
213 pUdp->UDP_CSR[(endpoint)] = reg; \\r
214} \r
215\r
216// Set flags in the UDP_CSR register\r
217#define UDP_SET_EP_FLAGS(endpoint, flags) { \\r
218 volatile unsigned int reg; \\r
219 reg = pUdp->UDP_CSR[(endpoint)]; \\r
220 reg |= REG_NO_EFFECT_1_ALL; \\r
221 reg |= (flags); \\r
222 pUdp->UDP_CSR[(endpoint)] = reg; \\r
223}\r
224\r
225/* USB standard request codes */\r
226#define STD_GET_STATUS_ZERO 0x0080\r
227#define STD_GET_STATUS_INTERFACE 0x0081\r
228#define STD_GET_STATUS_ENDPOINT 0x0082\r
229\r
230#define STD_CLEAR_FEATURE_ZERO 0x0100\r
231#define STD_CLEAR_FEATURE_INTERFACE 0x0101\r
232#define STD_CLEAR_FEATURE_ENDPOINT 0x0102\r
233\r
234#define STD_SET_FEATURE_ZERO 0x0300\r
235#define STD_SET_FEATURE_INTERFACE 0x0301\r
236#define STD_SET_FEATURE_ENDPOINT 0x0302\r
237\r
238#define STD_SET_ADDRESS 0x0500\r
239#define STD_GET_DESCRIPTOR 0x0680\r
240#define STD_SET_DESCRIPTOR 0x0700\r
241#define STD_GET_CONFIGURATION 0x0880\r
242#define STD_SET_CONFIGURATION 0x0900\r
243#define STD_GET_INTERFACE 0x0A81\r
244#define STD_SET_INTERFACE 0x0B01\r
245#define STD_SYNCH_FRAME 0x0C82\r
246\r
247/* CDC Class Specific Request Code */\r
248#define GET_LINE_CODING 0x21A1\r
249#define SET_LINE_CODING 0x2021\r
250#define SET_CONTROL_LINE_STATE 0x2221\r
251\r
252typedef struct {\r
253 unsigned int dwDTERRate;\r
254 char bCharFormat;\r
255 char bParityType;\r
256 char bDataBits;\r
257} AT91S_CDC_LINE_CODING, *AT91PS_CDC_LINE_CODING;\r
258\r
259AT91S_CDC_LINE_CODING line = {\r
260 115200, // baudrate\r
261 0, // 1 Stop Bit\r
262 0, // None Parity\r
263 8}; // 8 Data bits\r
264\r
265\r
266void AT91F_CDC_Enumerate();\r
267\r
268AT91PS_UDP pUdp = AT91C_BASE_UDP;\r
269byte_t btConfiguration = 0;\r
270byte_t btConnection = 0;\r
271byte_t btReceiveBank = AT91C_UDP_RX_DATA_BK0;\r
272\r
273\r
274//*----------------------------------------------------------------------------\r
275//* \fn usb_disable\r
276//* \brief This function deactivates the USB device\r
277//*----------------------------------------------------------------------------\r
278void usb_disable() {\r
279 // Disconnect the USB device\r
280 AT91C_BASE_PIOA->PIO_ODR = GPIO_USB_PU;\r
281\r
282 // Clear all lingering interrupts\r
283 if(pUdp->UDP_ISR & AT91C_UDP_ENDBUSRES) {\r
284 pUdp->UDP_ICR = AT91C_UDP_ENDBUSRES;\r
285 }\r
286}\r
287\r
288\r
289//*----------------------------------------------------------------------------\r
290//* \fn usb_enable\r
291//* \brief This function Activates the USB device\r
292//*----------------------------------------------------------------------------\r
293void usb_enable() {\r
294 // Set the PLL USB Divider\r
295 AT91C_BASE_CKGR->CKGR_PLLR |= AT91C_CKGR_USBDIV_1 ;\r
296\r
297 // Specific Chip USB Initialisation\r
298 // Enables the 48MHz USB clock UDPCK and System Peripheral USB Clock\r
299 AT91C_BASE_PMC->PMC_SCER = AT91C_PMC_UDP;\r
300 AT91C_BASE_PMC->PMC_PCER = (1 << AT91C_ID_UDP);\r
301\r
302 // Enable UDP PullUp (USB_DP_PUP) : enable & Clear of the corresponding PIO\r
303 // Set in PIO mode and Configure in Output\r
304 AT91C_BASE_PIOA->PIO_PER = GPIO_USB_PU; // Set in PIO mode\r
305 AT91C_BASE_PIOA->PIO_OER = GPIO_USB_PU; // Configure as Output\r
306\r
307 // Clear for set the Pullup resistor\r
308 AT91C_BASE_PIOA->PIO_CODR = GPIO_USB_PU;\r
309\r
310 // Disconnect and reconnect USB controller for 100ms\r
311 usb_disable();\r
312\r
313 // Wait for a short while\r
314 for (volatile size_t i=0; i<0x100000; i++);\r
315\r
316 // Reconnect USB reconnect\r
317 AT91C_BASE_PIOA->PIO_SODR = GPIO_USB_PU;\r
318 AT91C_BASE_PIOA->PIO_OER = GPIO_USB_PU;\r
319}\r
320\r
321\r
322//*----------------------------------------------------------------------------\r
323//* \fn usb_check\r
324//* \brief Test if the device is configured and handle enumeration\r
325//*----------------------------------------------------------------------------\r
326bool usb_check() {\r
327 AT91_REG isr = pUdp->UDP_ISR;\r
328\r
329 if (isr & AT91C_UDP_ENDBUSRES) {\r
330 pUdp->UDP_ICR = AT91C_UDP_ENDBUSRES;\r
331 // reset all endpoints\r
332 pUdp->UDP_RSTEP = (unsigned int)-1;\r
333 pUdp->UDP_RSTEP = 0;\r
334 // Enable the function\r
335 pUdp->UDP_FADDR = AT91C_UDP_FEN;\r
336 // Configure endpoint 0\r
337 pUdp->UDP_CSR[AT91C_EP_CONTROL] = (AT91C_UDP_EPEDS | AT91C_UDP_EPTYPE_CTRL);\r
338 } else if (isr & AT91C_UDP_EPINT0) {\r
339 pUdp->UDP_ICR = AT91C_UDP_EPINT0;\r
340 AT91F_CDC_Enumerate();\r
341 }\r
342 return (btConfiguration) ? true : false;\r
343}\r
344\r
345\r
346bool usb_poll()\r
347{\r
348 if (!usb_check()) return false;\r
349 return (pUdp->UDP_CSR[AT91C_EP_OUT] & btReceiveBank);\r
350}\r
351\r
352\r
353/**\r
354 In github PR #129, some users appears to get a false positive from\r
355 usb_poll, which returns true, but the usb_read operation\r
356 still returns 0.\r
357 This check is basically the same as above, but also checks\r
358 that the length available to read is non-zero, thus hopefully fixes the\r
359 bug.\r
360**/\r
361bool usb_poll_validate_length()\r
362{\r
363 if (!usb_check()) return false;\r
364 if (!(pUdp->UDP_CSR[AT91C_EP_OUT] & btReceiveBank)) return false;\r
365 return (pUdp->UDP_CSR[AT91C_EP_OUT] >> 16) > 0;\r
366}\r
367\r
368//*----------------------------------------------------------------------------\r
369//* \fn usb_read\r
370//* \brief Read available data from Endpoint OUT\r
371//*----------------------------------------------------------------------------\r
372uint32_t usb_read(byte_t* data, size_t len) {\r
373 byte_t bank = btReceiveBank;\r
374 uint32_t packetSize, nbBytesRcv = 0;\r
375 uint32_t time_out = 0;\r
376 \r
377 while (len) {\r
378 if (!usb_check()) break;\r
379\r
380 if ( pUdp->UDP_CSR[AT91C_EP_OUT] & bank ) {\r
381 packetSize = MIN(pUdp->UDP_CSR[AT91C_EP_OUT] >> 16, len);\r
382 len -= packetSize;\r
383 while(packetSize--)\r
384 data[nbBytesRcv++] = pUdp->UDP_FDR[AT91C_EP_OUT];\r
385 UDP_CLEAR_EP_FLAGS(AT91C_EP_OUT, bank);\r
386 if (bank == AT91C_UDP_RX_DATA_BK0) {\r
387 bank = AT91C_UDP_RX_DATA_BK1;\r
388 } else {\r
389 bank = AT91C_UDP_RX_DATA_BK0;\r
390 }\r
391 }\r
392 if (time_out++ == 0x1fff) break;\r
393 }\r
394\r
395 btReceiveBank = bank;\r
396 return nbBytesRcv;\r
397}\r
398\r
399\r
400//*----------------------------------------------------------------------------\r
401//* \fn usb_write\r
402//* \brief Send through endpoint 2\r
403//*----------------------------------------------------------------------------\r
404uint32_t usb_write(const byte_t* data, const size_t len) {\r
405 size_t length = len;\r
406 uint32_t cpt = 0;\r
407\r
408 if (!length) return 0;\r
409 if (!usb_check()) return 0;\r
410\r
411 // Send the first packet\r
412 cpt = MIN(length, AT91C_EP_IN_SIZE);\r
413 length -= cpt;\r
414 while (cpt--) {\r
415 pUdp->UDP_FDR[AT91C_EP_IN] = *data++;\r
416 }\r
417 UDP_SET_EP_FLAGS(AT91C_EP_IN, AT91C_UDP_TXPKTRDY);\r
418\r
419 while (length) {\r
420 // Fill the next bank\r
421 cpt = MIN(length, AT91C_EP_IN_SIZE);\r
422 length -= cpt;\r
423 while (cpt--) {\r
424 pUdp->UDP_FDR[AT91C_EP_IN] = *data++;\r
425 }\r
426 // Wait for the previous bank to be sent\r
427 while (!(pUdp->UDP_CSR[AT91C_EP_IN] & AT91C_UDP_TXCOMP)) {\r
428 if (!usb_check()) return length;\r
429 }\r
430 UDP_CLEAR_EP_FLAGS(AT91C_EP_IN, AT91C_UDP_TXCOMP);\r
431 while (pUdp->UDP_CSR[AT91C_EP_IN] & AT91C_UDP_TXCOMP);\r
432 UDP_SET_EP_FLAGS(AT91C_EP_IN, AT91C_UDP_TXPKTRDY);\r
433 }\r
434\r
435 // Wait for the end of transfer\r
436 while (!(pUdp->UDP_CSR[AT91C_EP_IN] & AT91C_UDP_TXCOMP)) {\r
437 if (!usb_check()) return length;\r
438 }\r
439\r
440 UDP_CLEAR_EP_FLAGS(AT91C_EP_IN, AT91C_UDP_TXCOMP);\r
441 while (pUdp->UDP_CSR[AT91C_EP_IN] & AT91C_UDP_TXCOMP);\r
442\r
443 return length;\r
444}\r
445\r
446\r
447//*----------------------------------------------------------------------------\r
448//* \fn AT91F_USB_SendData\r
449//* \brief Send Data through the control endpoint\r
450//*----------------------------------------------------------------------------\r
451unsigned int csrTab[100] = {0x00};\r
452unsigned char csrIdx = 0;\r
453\r
454static void AT91F_USB_SendData(AT91PS_UDP pUdp, const char *pData, uint32_t length) {\r
455 uint32_t cpt = 0;\r
456 AT91_REG csr;\r
457\r
458 do {\r
459 cpt = MIN(length, 8);\r
460 length -= cpt;\r
461\r
462 while (cpt--)\r
463 pUdp->UDP_FDR[0] = *pData++;\r
464\r
465 if (pUdp->UDP_CSR[AT91C_EP_CONTROL] & AT91C_UDP_TXCOMP) {\r
466 UDP_CLEAR_EP_FLAGS(AT91C_EP_CONTROL, AT91C_UDP_TXCOMP);\r
467 while (pUdp->UDP_CSR[AT91C_EP_CONTROL] & AT91C_UDP_TXCOMP);\r
468 }\r
469\r
470 UDP_SET_EP_FLAGS(AT91C_EP_CONTROL, AT91C_UDP_TXPKTRDY);\r
471 do {\r
472 csr = pUdp->UDP_CSR[AT91C_EP_CONTROL];\r
473\r
474 // Data IN stage has been stopped by a status OUT\r
475 if (csr & AT91C_UDP_RX_DATA_BK0) {\r
476 UDP_CLEAR_EP_FLAGS(AT91C_EP_CONTROL, AT91C_UDP_RX_DATA_BK0);\r
477 return;\r
478 }\r
479 } while ( !(csr & AT91C_UDP_TXCOMP) );\r
480\r
481 } while (length);\r
482\r
483 if (pUdp->UDP_CSR[AT91C_EP_CONTROL] & AT91C_UDP_TXCOMP) {\r
484 UDP_CLEAR_EP_FLAGS(AT91C_EP_CONTROL, AT91C_UDP_TXCOMP);\r
485 while (pUdp->UDP_CSR[AT91C_EP_CONTROL] & AT91C_UDP_TXCOMP);\r
486 }\r
487}\r
488\r
489\r
490//*----------------------------------------------------------------------------\r
491//* \fn AT91F_USB_SendZlp\r
492//* \brief Send zero length packet through the control endpoint\r
493//*----------------------------------------------------------------------------\r
494void AT91F_USB_SendZlp(AT91PS_UDP pUdp) {\r
495 UDP_SET_EP_FLAGS(AT91C_EP_CONTROL, AT91C_UDP_TXPKTRDY);\r
496 while ( !(pUdp->UDP_CSR[AT91C_EP_CONTROL] & AT91C_UDP_TXCOMP) );\r
497 UDP_CLEAR_EP_FLAGS(AT91C_EP_CONTROL, AT91C_UDP_TXCOMP);\r
498 while (pUdp->UDP_CSR[AT91C_EP_CONTROL] & AT91C_UDP_TXCOMP);\r
499}\r
500\r
501\r
502//*----------------------------------------------------------------------------\r
503//* \fn AT91F_USB_SendStall\r
504//* \brief Stall the control endpoint\r
505//*----------------------------------------------------------------------------\r
506void AT91F_USB_SendStall(AT91PS_UDP pUdp) {\r
507 UDP_SET_EP_FLAGS(AT91C_EP_CONTROL, AT91C_UDP_FORCESTALL);\r
508 while ( !(pUdp->UDP_CSR[AT91C_EP_CONTROL] & AT91C_UDP_ISOERROR) );\r
509 UDP_CLEAR_EP_FLAGS(AT91C_EP_CONTROL, AT91C_UDP_FORCESTALL | AT91C_UDP_ISOERROR);\r
510 while (pUdp->UDP_CSR[AT91C_EP_CONTROL] & (AT91C_UDP_FORCESTALL | AT91C_UDP_ISOERROR));\r
511}\r
512\r
513\r
514//*----------------------------------------------------------------------------\r
515//* \fn AT91F_CDC_Enumerate\r
516//* \brief This function is a callback invoked when a SETUP packet is received\r
517//*----------------------------------------------------------------------------\r
518void AT91F_CDC_Enumerate() {\r
519 byte_t bmRequestType, bRequest;\r
520 uint16_t wValue, wIndex, wLength, wStatus;\r
521\r
522 if ( !(pUdp->UDP_CSR[AT91C_EP_CONTROL] & AT91C_UDP_RXSETUP) )\r
523 return;\r
524\r
525 bmRequestType = pUdp->UDP_FDR[AT91C_EP_CONTROL];\r
526 bRequest = pUdp->UDP_FDR[AT91C_EP_CONTROL];\r
527 wValue = (pUdp->UDP_FDR[AT91C_EP_CONTROL] & 0xFF);\r
528 wValue |= (pUdp->UDP_FDR[AT91C_EP_CONTROL] << 8);\r
529 wIndex = (pUdp->UDP_FDR[AT91C_EP_CONTROL] & 0xFF);\r
530 wIndex |= (pUdp->UDP_FDR[AT91C_EP_CONTROL] << 8);\r
531 wLength = (pUdp->UDP_FDR[AT91C_EP_CONTROL] & 0xFF);\r
532 wLength |= (pUdp->UDP_FDR[AT91C_EP_CONTROL] << 8);\r
533\r
534 if (bmRequestType & 0x80) { // Data Phase Transfer Direction Device to Host\r
535 UDP_SET_EP_FLAGS(AT91C_EP_CONTROL, AT91C_UDP_DIR);\r
536 while ( !(pUdp->UDP_CSR[AT91C_EP_CONTROL] & AT91C_UDP_DIR) );\r
537 }\r
538 UDP_CLEAR_EP_FLAGS(AT91C_EP_CONTROL, AT91C_UDP_RXSETUP);\r
539 while ( (pUdp->UDP_CSR[AT91C_EP_CONTROL] & AT91C_UDP_RXSETUP) );\r
540\r
541 // Handle supported standard device request Cf Table 9-3 in USB specification Rev 1.1\r
542 switch ((bRequest << 8) | bmRequestType) {\r
543 case STD_GET_DESCRIPTOR:\r
544 if (wValue == 0x100) // Return Device Descriptor\r
545 AT91F_USB_SendData(pUdp, devDescriptor, MIN(sizeof(devDescriptor), wLength));\r
546 else if (wValue == 0x200) // Return Configuration Descriptor\r
547 AT91F_USB_SendData(pUdp, cfgDescriptor, MIN(sizeof(cfgDescriptor), wLength));\r
548 else if ((wValue & 0xF00) == 0x300) { // Return String Descriptor\r
549 const char *strDescriptor = getStringDescriptor(wValue & 0xff);\r
550 if (strDescriptor != NULL) {\r
551 AT91F_USB_SendData(pUdp, strDescriptor, MIN(strDescriptor[0], wLength));\r
552 } else {\r
553 AT91F_USB_SendStall(pUdp);\r
554 }\r
555 }\r
556 else\r
557 AT91F_USB_SendStall(pUdp);\r
558 break;\r
559 case STD_SET_ADDRESS:\r
560 AT91F_USB_SendZlp(pUdp);\r
561 pUdp->UDP_FADDR = (AT91C_UDP_FEN | wValue);\r
562 pUdp->UDP_GLBSTATE = (wValue) ? AT91C_UDP_FADDEN : 0;\r
563 break;\r
564 case STD_SET_CONFIGURATION:\r
565 btConfiguration = wValue;\r
566 AT91F_USB_SendZlp(pUdp);\r
567 pUdp->UDP_GLBSTATE = (wValue) ? AT91C_UDP_CONFG : AT91C_UDP_FADDEN;\r
568 pUdp->UDP_CSR[AT91C_EP_OUT] = (wValue) ? (AT91C_UDP_EPEDS | AT91C_UDP_EPTYPE_BULK_OUT) : 0;\r
569 pUdp->UDP_CSR[AT91C_EP_IN] = (wValue) ? (AT91C_UDP_EPEDS | AT91C_UDP_EPTYPE_BULK_IN) : 0;\r
570 pUdp->UDP_CSR[AT91C_EP_NOTIFY] = (wValue) ? (AT91C_UDP_EPEDS | AT91C_UDP_EPTYPE_INT_IN) : 0;\r
571 break;\r
572 case STD_GET_CONFIGURATION:\r
573 AT91F_USB_SendData(pUdp, (char *) &(btConfiguration), sizeof(btConfiguration));\r
574 break;\r
575 case STD_GET_STATUS_ZERO:\r
576 wStatus = 0; // Device is Bus powered, remote wakeup disabled\r
577 AT91F_USB_SendData(pUdp, (char *) &wStatus, sizeof(wStatus));\r
578 break;\r
579 case STD_GET_STATUS_INTERFACE:\r
580 wStatus = 0; // reserved for future use\r
581 AT91F_USB_SendData(pUdp, (char *) &wStatus, sizeof(wStatus));\r
582 break;\r
583 case STD_GET_STATUS_ENDPOINT:\r
584 wStatus = 0;\r
585 wIndex &= 0x0F;\r
586 if ((pUdp->UDP_GLBSTATE & AT91C_UDP_CONFG) && (wIndex <= AT91C_EP_NOTIFY)) {\r
587 wStatus = (pUdp->UDP_CSR[wIndex] & AT91C_UDP_EPEDS) ? 0 : 1;\r
588 AT91F_USB_SendData(pUdp, (char *) &wStatus, sizeof(wStatus));\r
589 }\r
590 else if ((pUdp->UDP_GLBSTATE & AT91C_UDP_FADDEN) && (wIndex == AT91C_EP_CONTROL)) {\r
591 wStatus = (pUdp->UDP_CSR[wIndex] & AT91C_UDP_EPEDS) ? 0 : 1;\r
592 AT91F_USB_SendData(pUdp, (char *) &wStatus, sizeof(wStatus));\r
593 }\r
594 else\r
595 AT91F_USB_SendStall(pUdp);\r
596 break;\r
597 case STD_SET_FEATURE_ZERO:\r
598 AT91F_USB_SendStall(pUdp);\r
599 break;\r
600 case STD_SET_FEATURE_INTERFACE:\r
601 AT91F_USB_SendZlp(pUdp);\r
602 break;\r
603 case STD_SET_FEATURE_ENDPOINT:\r
604 wIndex &= 0x0F;\r
605 if ((wValue == 0) && (wIndex >= AT91C_EP_OUT) && (wIndex <= AT91C_EP_NOTIFY)) {\r
606 pUdp->UDP_CSR[wIndex] = 0;\r
607 AT91F_USB_SendZlp(pUdp);\r
608 }\r
609 else\r
610 AT91F_USB_SendStall(pUdp);\r
611 break;\r
612 case STD_CLEAR_FEATURE_ZERO:\r
613 AT91F_USB_SendStall(pUdp);\r
614 break;\r
615 case STD_CLEAR_FEATURE_INTERFACE:\r
616 AT91F_USB_SendZlp(pUdp);\r
617 break;\r
618 case STD_CLEAR_FEATURE_ENDPOINT:\r
619 wIndex &= 0x0F;\r
620 if ((wValue == 0) && (wIndex >= AT91C_EP_OUT) && (wIndex <= AT91C_EP_NOTIFY)) {\r
621 if (wIndex == AT91C_EP_OUT)\r
622 pUdp->UDP_CSR[AT91C_EP_OUT] = (AT91C_UDP_EPEDS | AT91C_UDP_EPTYPE_BULK_OUT);\r
623 else if (wIndex == AT91C_EP_IN)\r
624 pUdp->UDP_CSR[AT91C_EP_IN] = (AT91C_UDP_EPEDS | AT91C_UDP_EPTYPE_BULK_IN);\r
625 else if (wIndex == AT91C_EP_NOTIFY)\r
626 pUdp->UDP_CSR[AT91C_EP_NOTIFY] = (AT91C_UDP_EPEDS | AT91C_UDP_EPTYPE_INT_IN);\r
627 AT91F_USB_SendZlp(pUdp);\r
628 }\r
629 else\r
630 AT91F_USB_SendStall(pUdp);\r
631 break;\r
632\r
633 // handle CDC class requests\r
634 case SET_LINE_CODING:\r
635 while ( !(pUdp->UDP_CSR[AT91C_EP_CONTROL] & AT91C_UDP_RX_DATA_BK0) );\r
636 UDP_CLEAR_EP_FLAGS(AT91C_EP_CONTROL, AT91C_UDP_RX_DATA_BK0);\r
637 AT91F_USB_SendZlp(pUdp);\r
638 break;\r
639 case GET_LINE_CODING:\r
640 AT91F_USB_SendData(pUdp, (char *) &line, MIN(sizeof(line), wLength));\r
641 break;\r
642 case SET_CONTROL_LINE_STATE:\r
643 btConnection = wValue;\r
644 AT91F_USB_SendZlp(pUdp);\r
645 break;\r
646 default:\r
647 AT91F_USB_SendStall(pUdp);\r
648 break;\r
649 }\r
650}\r
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