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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
47// Language must always be 0.\r
48#define STR_LANGUAGE_CODES 0x00\r
49#define STR_MANUFACTURER 0x01\r
50#define STR_PRODUCT 0x02\r
51\r
52static const char devDescriptor[] = {\r
53 /* Device descriptor */\r
54 0x12, // bLength\r
55 0x01, // bDescriptorType\r
56 0x00,0x02, // Complies with USB Spec. Release (0200h = release 2.0)\r
57 0x02, // bDeviceClass: (Communication Device Class)\r
58 0x00, // bDeviceSubclass: (unused at this time)\r
59 0x00, // bDeviceProtocol: (unused at this time)\r
60 0x08, // bMaxPacketSize0\r
61 0xc4,0x9a, // Vendor ID (0x9ac4 = J. Westhues)\r
62 0x8f,0x4b, // Product ID (0x4b8f = Proxmark-3 RFID Instrument)\r
63 0x01,0x00, // Device release number (0001)\r
64 STR_MANUFACTURER, // iManufacturer\r
65 STR_PRODUCT, // iProduct\r
66 0x00, // iSerialNumber\r
67 0x01 // bNumConfigs\r
68};\r
69\r
70static const char cfgDescriptor[] = {\r
71 /* ============== CONFIGURATION 1 =========== */\r
72 /* Configuration 1 descriptor */\r
73 0x09, // CbLength\r
74 0x02, // CbDescriptorType\r
75 0x43, // CwTotalLength 2 EP + Control\r
76 0x00,\r
77 0x02, // CbNumInterfaces\r
78 0x01, // CbConfigurationValue\r
79 0x00, // CiConfiguration\r
80 0x80, // CbmAttributes (Bus Powered)\r
81 0x4B, // CMaxPower (150mA max current drawn from bus)\r
82\r
83 /* Interface 0 Descriptor: Communication Class Interface */\r
84 0x09, // bLength\r
85 0x04, // bDescriptorType\r
86 0x00, // bInterfaceNumber\r
87 0x00, // bAlternateSetting\r
88 0x01, // bNumEndpoints\r
89 0x02, // bInterfaceClass: Communication Interface Class\r
90 0x02, // bInterfaceSubclass: Abstract Control Model\r
91 0x01, // bInterfaceProtocol: Common AT Commands, V.25ter\r
92 0x00, // iInterface\r
93\r
94 /* Header Functional Descriptor */\r
95 0x05, // bFunction Length\r
96 0x24, // bDescriptor type: CS_INTERFACE\r
97 0x00, // bDescriptor subtype: Header Functional Descriptor\r
98 0x10, // bcdCDC:1.1\r
99 0x01,\r
100\r
101 /* ACM Functional Descriptor */\r
102 0x04, // bFunctionLength\r
103 0x24, // bDescriptor Type: CS_INTERFACE\r
104 0x02, // bDescriptor Subtype: Abstract Control Management Functional Descriptor\r
105 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
106\r
107 /* Union Functional Descriptor */\r
108 0x05, // bFunctionLength\r
109 0x24, // bDescriptorType: CS_INTERFACE\r
110 0x06, // bDescriptor Subtype: Union Functional Descriptor\r
111 0x00, // bMasterInterface: Communication Class Interface\r
112 0x01, // bSlaveInterface0: Data Class Interface\r
113\r
114 /* Call Management Functional Descriptor */\r
115 0x05, // bFunctionLength\r
116 0x24, // bDescriptor Type: CS_INTERFACE\r
117 0x01, // bDescriptor Subtype: Call Management Functional Descriptor\r
118 0x00, // bmCapabilities: Device sends/receives call management information only over the Communication Class interface. Device does not handle call management itself\r
119 0x01, // bDataInterface: Data Class Interface 1\r
120\r
121 /* Endpoint 1 descriptor */\r
122 0x07, // bLength\r
123 0x05, // bDescriptorType\r
124 0x83, // bEndpointAddress: Endpoint 03 - IN\r
125 0x03, // bmAttributes: INT\r
126 0x08, // wMaxPacketSize: 8\r
127 0x00,\r
128 0xFF, // bInterval\r
129\r
130 /* Interface 1 Descriptor: Data Class Interface */\r
131 0x09, // bLength\r
132 0x04, // bDescriptorType\r
133 0x01, // bInterfaceNumber\r
134 0x00, // bAlternateSetting\r
135 0x02, // bNumEndpoints\r
136 0x0A, // bInterfaceClass: Data Interface Class\r
137 0x00, // bInterfaceSubclass: not used\r
138 0x00, // bInterfaceProtocol: No class specific protocol required)\r
139 0x00, // iInterface\r
140\r
141 /* Endpoint 1 descriptor */\r
142 0x07, // bLength\r
143 0x05, // bDescriptorType\r
144 0x01, // bEndpointAddress: Endpoint 01 - OUT\r
145 0x02, // bmAttributes: BULK\r
146 AT91C_EP_OUT_SIZE, // wMaxPacketSize\r
147 0x00,\r
148 0x00, // bInterval\r
149\r
150 /* Endpoint 2 descriptor */\r
151 0x07, // bLength\r
152 0x05, // bDescriptorType\r
153 0x82, // bEndpointAddress: Endpoint 02 - IN\r
154 0x02, // bmAttributes: BULK\r
155 AT91C_EP_IN_SIZE, // wMaxPacketSize\r
156 0x00,\r
157 0x00 // bInterval\r
158};\r
159\r
160static const char StrDescLanguageCodes[] = {\r
161 4, // Length\r
162 0x03, // Type is string\r
163 0x09, 0x04 // supported language Code 0 = 0x0409 (English)\r
164};\r
165\r
166// Note: ModemManager (Linux) ignores Proxmark3 devices by matching the\r
167// manufacturer string "proxmark.org". Don't change this.\r
168static const char StrDescManufacturer[] = {\r
169 26, // Length\r
170 0x03, // Type is string\r
171 'p', 0x00,\r
172 'r', 0x00,\r
173 'o', 0x00,\r
174 'x', 0x00,\r
175 'm', 0x00,\r
176 'a', 0x00,\r
177 'r', 0x00,\r
178 'k', 0x00,\r
179 '.', 0x00,\r
180 'o', 0x00,\r
181 'r', 0x00,\r
182 'g', 0x00\r
183};\r
184\r
185static const char StrDescProduct[] = {\r
186 20, // Length\r
187 0x03, // Type is string\r
188 'p', 0x00,\r
189 'r', 0x00,\r
190 'o', 0x00,\r
191 'x', 0x00,\r
192 'm', 0x00,\r
193 'a', 0x00,\r
194 'r', 0x00,\r
195 'k', 0x00,\r
196 '3', 0x00\r
197};\r
198\r
199const char* getStringDescriptor(uint8_t idx)\r
200{\r
201 switch (idx) {\r
202 case STR_LANGUAGE_CODES:\r
203 return StrDescLanguageCodes;\r
204 case STR_MANUFACTURER:\r
205 return StrDescManufacturer;\r
206 case STR_PRODUCT:\r
207 return StrDescProduct;\r
208 default:\r
209 return NULL;\r
210 }\r
211}\r
212\r
213// Bitmap for all status bits in CSR which must be written as 1 to cause no effect\r
214#define REG_NO_EFFECT_1_ALL AT91C_UDP_RX_DATA_BK0 | AT91C_UDP_RX_DATA_BK1 \\r
215 |AT91C_UDP_STALLSENT | AT91C_UDP_RXSETUP \\r
216 |AT91C_UDP_TXCOMP\r
217\r
218// Clear flags in the UDP_CSR register\r
219#define UDP_CLEAR_EP_FLAGS(endpoint, flags) { \\r
220 volatile unsigned int reg; \\r
221 reg = pUdp->UDP_CSR[(endpoint)]; \\r
222 reg |= REG_NO_EFFECT_1_ALL; \\r
223 reg &= ~(flags); \\r
224 pUdp->UDP_CSR[(endpoint)] = reg; \\r
225} \r
226\r
227// Set flags in the UDP_CSR register\r
228#define UDP_SET_EP_FLAGS(endpoint, flags) { \\r
229 volatile unsigned int reg; \\r
230 reg = pUdp->UDP_CSR[(endpoint)]; \\r
231 reg |= REG_NO_EFFECT_1_ALL; \\r
232 reg |= (flags); \\r
233 pUdp->UDP_CSR[(endpoint)] = reg; \\r
234}\r
235\r
236/* USB standard request codes */\r
237#define STD_GET_STATUS_ZERO 0x0080\r
238#define STD_GET_STATUS_INTERFACE 0x0081\r
239#define STD_GET_STATUS_ENDPOINT 0x0082\r
240\r
241#define STD_CLEAR_FEATURE_ZERO 0x0100\r
242#define STD_CLEAR_FEATURE_INTERFACE 0x0101\r
243#define STD_CLEAR_FEATURE_ENDPOINT 0x0102\r
244\r
245#define STD_SET_FEATURE_ZERO 0x0300\r
246#define STD_SET_FEATURE_INTERFACE 0x0301\r
247#define STD_SET_FEATURE_ENDPOINT 0x0302\r
248\r
249#define STD_SET_ADDRESS 0x0500\r
250#define STD_GET_DESCRIPTOR 0x0680\r
251#define STD_SET_DESCRIPTOR 0x0700\r
252#define STD_GET_CONFIGURATION 0x0880\r
253#define STD_SET_CONFIGURATION 0x0900\r
254#define STD_GET_INTERFACE 0x0A81\r
255#define STD_SET_INTERFACE 0x0B01\r
256#define STD_SYNCH_FRAME 0x0C82\r
257\r
258/* CDC Class Specific Request Code */\r
259#define GET_LINE_CODING 0x21A1\r
260#define SET_LINE_CODING 0x2021\r
261#define SET_CONTROL_LINE_STATE 0x2221\r
262\r
263typedef struct {\r
264 unsigned int dwDTERRate;\r
265 char bCharFormat;\r
266 char bParityType;\r
267 char bDataBits;\r
268} AT91S_CDC_LINE_CODING, *AT91PS_CDC_LINE_CODING;\r
269\r
270AT91S_CDC_LINE_CODING line = {\r
271 115200, // baudrate\r
272 0, // 1 Stop Bit\r
273 0, // None Parity\r
274 8}; // 8 Data bits\r
275\r
276\r
277void AT91F_CDC_Enumerate();\r
278\r
279AT91PS_UDP pUdp = AT91C_BASE_UDP;\r
280byte_t btConfiguration = 0;\r
281byte_t btConnection = 0;\r
282byte_t btReceiveBank = AT91C_UDP_RX_DATA_BK0;\r
283\r
284\r
285//*----------------------------------------------------------------------------\r
286//* \fn usb_disable\r
287//* \brief This function deactivates the USB device\r
288//*----------------------------------------------------------------------------\r
289void usb_disable() {\r
290 // Disconnect the USB device\r
291 AT91C_BASE_PIOA->PIO_ODR = GPIO_USB_PU;\r
292\r
293 // Clear all lingering interrupts\r
294 if(pUdp->UDP_ISR & AT91C_UDP_ENDBUSRES) {\r
295 pUdp->UDP_ICR = AT91C_UDP_ENDBUSRES;\r
296 }\r
297}\r
298\r
299\r
300//*----------------------------------------------------------------------------\r
301//* \fn usb_enable\r
302//* \brief This function Activates the USB device\r
303//*----------------------------------------------------------------------------\r
304void usb_enable() {\r
305 // Set the PLL USB Divider\r
306 AT91C_BASE_CKGR->CKGR_PLLR |= AT91C_CKGR_USBDIV_1 ;\r
307\r
308 // Specific Chip USB Initialisation\r
309 // Enables the 48MHz USB clock UDPCK and System Peripheral USB Clock\r
310 AT91C_BASE_PMC->PMC_SCER = AT91C_PMC_UDP;\r
311 AT91C_BASE_PMC->PMC_PCER = (1 << AT91C_ID_UDP);\r
312\r
313 // Enable UDP PullUp (USB_DP_PUP) : enable & Clear of the corresponding PIO\r
314 // Set in PIO mode and Configure in Output\r
315 AT91C_BASE_PIOA->PIO_PER = GPIO_USB_PU; // Set in PIO mode\r
316 AT91C_BASE_PIOA->PIO_OER = GPIO_USB_PU; // Configure as Output\r
317\r
318 // Clear for set the Pullup resistor\r
319 AT91C_BASE_PIOA->PIO_CODR = GPIO_USB_PU;\r
320\r
321 // Disconnect and reconnect USB controller for 100ms\r
322 usb_disable();\r
323\r
324 // Wait for a short while\r
325 for (volatile size_t i=0; i<0x100000; i++);\r
326\r
327 // Reconnect USB reconnect\r
328 AT91C_BASE_PIOA->PIO_SODR = GPIO_USB_PU;\r
329 AT91C_BASE_PIOA->PIO_OER = GPIO_USB_PU;\r
330}\r
331\r
332\r
333//*----------------------------------------------------------------------------\r
334//* \fn usb_check\r
335//* \brief Test if the device is configured and handle enumeration\r
336//*----------------------------------------------------------------------------\r
337bool usb_check() {\r
338 AT91_REG isr = pUdp->UDP_ISR;\r
339\r
340 if (isr & AT91C_UDP_ENDBUSRES) {\r
341 pUdp->UDP_ICR = AT91C_UDP_ENDBUSRES;\r
342 // reset all endpoints\r
343 pUdp->UDP_RSTEP = (unsigned int)-1;\r
344 pUdp->UDP_RSTEP = 0;\r
345 // Enable the function\r
346 pUdp->UDP_FADDR = AT91C_UDP_FEN;\r
347 // Configure endpoint 0\r
348 pUdp->UDP_CSR[AT91C_EP_CONTROL] = (AT91C_UDP_EPEDS | AT91C_UDP_EPTYPE_CTRL);\r
349 } else if (isr & AT91C_UDP_EPINT0) {\r
350 pUdp->UDP_ICR = AT91C_UDP_EPINT0;\r
351 AT91F_CDC_Enumerate();\r
352 }\r
353 return (btConfiguration) ? true : false;\r
354}\r
355\r
356\r
357bool usb_poll()\r
358{\r
359 if (!usb_check()) return false;\r
360 return (pUdp->UDP_CSR[AT91C_EP_OUT] & btReceiveBank);\r
361}\r
362\r
363\r
364/**\r
365 In github PR #129, some users appears to get a false positive from\r
366 usb_poll, which returns true, but the usb_read operation\r
367 still returns 0.\r
368 This check is basically the same as above, but also checks\r
369 that the length available to read is non-zero, thus hopefully fixes the\r
370 bug.\r
371**/\r
372bool usb_poll_validate_length()\r
373{\r
374 if (!usb_check()) return false;\r
375 if (!(pUdp->UDP_CSR[AT91C_EP_OUT] & btReceiveBank)) return false;\r
376 return (pUdp->UDP_CSR[AT91C_EP_OUT] >> 16) > 0;\r
377}\r
378\r
379//*----------------------------------------------------------------------------\r
380//* \fn usb_read\r
381//* \brief Read available data from Endpoint OUT\r
382//*----------------------------------------------------------------------------\r
383uint32_t usb_read(byte_t* data, size_t len) {\r
384 byte_t bank = btReceiveBank;\r
385 uint32_t packetSize, nbBytesRcv = 0;\r
386 uint32_t time_out = 0;\r
387 \r
388 while (len) {\r
389 if (!usb_check()) break;\r
390\r
391 if ( pUdp->UDP_CSR[AT91C_EP_OUT] & bank ) {\r
392 packetSize = MIN(pUdp->UDP_CSR[AT91C_EP_OUT] >> 16, len);\r
393 len -= packetSize;\r
394 while(packetSize--)\r
395 data[nbBytesRcv++] = pUdp->UDP_FDR[AT91C_EP_OUT];\r
396 UDP_CLEAR_EP_FLAGS(AT91C_EP_OUT, bank);\r
397 if (bank == AT91C_UDP_RX_DATA_BK0) {\r
398 bank = AT91C_UDP_RX_DATA_BK1;\r
399 } else {\r
400 bank = AT91C_UDP_RX_DATA_BK0;\r
401 }\r
402 }\r
403 if (time_out++ == 0x1fff) break;\r
404 }\r
405\r
406 btReceiveBank = bank;\r
407 return nbBytesRcv;\r
408}\r
409\r
410\r
411//*----------------------------------------------------------------------------\r
412//* \fn usb_write\r
413//* \brief Send through endpoint 2\r
414//*----------------------------------------------------------------------------\r
415uint32_t usb_write(const byte_t* data, const size_t len) {\r
416 size_t length = len;\r
417 uint32_t cpt = 0;\r
418\r
419 if (!length) return 0;\r
420 if (!usb_check()) return 0;\r
421\r
422 // Send the first packet\r
423 cpt = MIN(length, AT91C_EP_IN_SIZE);\r
424 length -= cpt;\r
425 while (cpt--) {\r
426 pUdp->UDP_FDR[AT91C_EP_IN] = *data++;\r
427 }\r
428 UDP_SET_EP_FLAGS(AT91C_EP_IN, AT91C_UDP_TXPKTRDY);\r
429\r
430 while (length) {\r
431 // Fill the next bank\r
432 cpt = MIN(length, AT91C_EP_IN_SIZE);\r
433 length -= cpt;\r
434 while (cpt--) {\r
435 pUdp->UDP_FDR[AT91C_EP_IN] = *data++;\r
436 }\r
437 // Wait for the previous bank to be sent\r
438 while (!(pUdp->UDP_CSR[AT91C_EP_IN] & AT91C_UDP_TXCOMP)) {\r
439 if (!usb_check()) return length;\r
440 }\r
441 UDP_CLEAR_EP_FLAGS(AT91C_EP_IN, AT91C_UDP_TXCOMP);\r
442 while (pUdp->UDP_CSR[AT91C_EP_IN] & AT91C_UDP_TXCOMP);\r
443 UDP_SET_EP_FLAGS(AT91C_EP_IN, AT91C_UDP_TXPKTRDY);\r
444 }\r
445\r
446 // Wait for the end of transfer\r
447 while (!(pUdp->UDP_CSR[AT91C_EP_IN] & AT91C_UDP_TXCOMP)) {\r
448 if (!usb_check()) return length;\r
449 }\r
450\r
451 UDP_CLEAR_EP_FLAGS(AT91C_EP_IN, AT91C_UDP_TXCOMP);\r
452 while (pUdp->UDP_CSR[AT91C_EP_IN] & AT91C_UDP_TXCOMP);\r
453\r
454 return length;\r
455}\r
456\r
457\r
458//*----------------------------------------------------------------------------\r
459//* \fn AT91F_USB_SendData\r
460//* \brief Send Data through the control endpoint\r
461//*----------------------------------------------------------------------------\r
462unsigned int csrTab[100] = {0x00};\r
463unsigned char csrIdx = 0;\r
464\r
465static void AT91F_USB_SendData(AT91PS_UDP pUdp, const char *pData, uint32_t length) {\r
466 uint32_t cpt = 0;\r
467 AT91_REG csr;\r
468\r
469 do {\r
470 cpt = MIN(length, 8);\r
471 length -= cpt;\r
472\r
473 while (cpt--)\r
474 pUdp->UDP_FDR[0] = *pData++;\r
475\r
476 if (pUdp->UDP_CSR[AT91C_EP_CONTROL] & AT91C_UDP_TXCOMP) {\r
477 UDP_CLEAR_EP_FLAGS(AT91C_EP_CONTROL, AT91C_UDP_TXCOMP);\r
478 while (pUdp->UDP_CSR[AT91C_EP_CONTROL] & AT91C_UDP_TXCOMP);\r
479 }\r
480\r
481 UDP_SET_EP_FLAGS(AT91C_EP_CONTROL, AT91C_UDP_TXPKTRDY);\r
482 do {\r
483 csr = pUdp->UDP_CSR[AT91C_EP_CONTROL];\r
484\r
485 // Data IN stage has been stopped by a status OUT\r
486 if (csr & AT91C_UDP_RX_DATA_BK0) {\r
487 UDP_CLEAR_EP_FLAGS(AT91C_EP_CONTROL, AT91C_UDP_RX_DATA_BK0);\r
488 return;\r
489 }\r
490 } while ( !(csr & AT91C_UDP_TXCOMP) );\r
491\r
492 } while (length);\r
493\r
494 if (pUdp->UDP_CSR[AT91C_EP_CONTROL] & AT91C_UDP_TXCOMP) {\r
495 UDP_CLEAR_EP_FLAGS(AT91C_EP_CONTROL, AT91C_UDP_TXCOMP);\r
496 while (pUdp->UDP_CSR[AT91C_EP_CONTROL] & AT91C_UDP_TXCOMP);\r
497 }\r
498}\r
499\r
500\r
501//*----------------------------------------------------------------------------\r
502//* \fn AT91F_USB_SendZlp\r
503//* \brief Send zero length packet through the control endpoint\r
504//*----------------------------------------------------------------------------\r
505void AT91F_USB_SendZlp(AT91PS_UDP pUdp) {\r
506 UDP_SET_EP_FLAGS(AT91C_EP_CONTROL, AT91C_UDP_TXPKTRDY);\r
507 while ( !(pUdp->UDP_CSR[AT91C_EP_CONTROL] & AT91C_UDP_TXCOMP) );\r
508 UDP_CLEAR_EP_FLAGS(AT91C_EP_CONTROL, AT91C_UDP_TXCOMP);\r
509 while (pUdp->UDP_CSR[AT91C_EP_CONTROL] & AT91C_UDP_TXCOMP);\r
510}\r
511\r
512\r
513//*----------------------------------------------------------------------------\r
514//* \fn AT91F_USB_SendStall\r
515//* \brief Stall the control endpoint\r
516//*----------------------------------------------------------------------------\r
517void AT91F_USB_SendStall(AT91PS_UDP pUdp) {\r
518 UDP_SET_EP_FLAGS(AT91C_EP_CONTROL, AT91C_UDP_FORCESTALL);\r
519 while ( !(pUdp->UDP_CSR[AT91C_EP_CONTROL] & AT91C_UDP_ISOERROR) );\r
520 UDP_CLEAR_EP_FLAGS(AT91C_EP_CONTROL, AT91C_UDP_FORCESTALL | AT91C_UDP_ISOERROR);\r
521 while (pUdp->UDP_CSR[AT91C_EP_CONTROL] & (AT91C_UDP_FORCESTALL | AT91C_UDP_ISOERROR));\r
522}\r
523\r
524\r
525//*----------------------------------------------------------------------------\r
526//* \fn AT91F_CDC_Enumerate\r
527//* \brief This function is a callback invoked when a SETUP packet is received\r
528//*----------------------------------------------------------------------------\r
529void AT91F_CDC_Enumerate() {\r
530 byte_t bmRequestType, bRequest;\r
531 uint16_t wValue, wIndex, wLength, wStatus;\r
532\r
533 if ( !(pUdp->UDP_CSR[AT91C_EP_CONTROL] & AT91C_UDP_RXSETUP) )\r
534 return;\r
535\r
536 bmRequestType = pUdp->UDP_FDR[AT91C_EP_CONTROL];\r
537 bRequest = pUdp->UDP_FDR[AT91C_EP_CONTROL];\r
538 wValue = (pUdp->UDP_FDR[AT91C_EP_CONTROL] & 0xFF);\r
539 wValue |= (pUdp->UDP_FDR[AT91C_EP_CONTROL] << 8);\r
540 wIndex = (pUdp->UDP_FDR[AT91C_EP_CONTROL] & 0xFF);\r
541 wIndex |= (pUdp->UDP_FDR[AT91C_EP_CONTROL] << 8);\r
542 wLength = (pUdp->UDP_FDR[AT91C_EP_CONTROL] & 0xFF);\r
543 wLength |= (pUdp->UDP_FDR[AT91C_EP_CONTROL] << 8);\r
544\r
545 if (bmRequestType & 0x80) { // Data Phase Transfer Direction Device to Host\r
546 UDP_SET_EP_FLAGS(AT91C_EP_CONTROL, AT91C_UDP_DIR);\r
547 while ( !(pUdp->UDP_CSR[AT91C_EP_CONTROL] & AT91C_UDP_DIR) );\r
548 }\r
549 UDP_CLEAR_EP_FLAGS(AT91C_EP_CONTROL, AT91C_UDP_RXSETUP);\r
550 while ( (pUdp->UDP_CSR[AT91C_EP_CONTROL] & AT91C_UDP_RXSETUP) );\r
551\r
552 // Handle supported standard device request Cf Table 9-3 in USB specification Rev 1.1\r
553 switch ((bRequest << 8) | bmRequestType) {\r
554 case STD_GET_DESCRIPTOR:\r
555 if (wValue == 0x100) // Return Device Descriptor\r
556 AT91F_USB_SendData(pUdp, devDescriptor, MIN(sizeof(devDescriptor), wLength));\r
557 else if (wValue == 0x200) // Return Configuration Descriptor\r
558 AT91F_USB_SendData(pUdp, cfgDescriptor, MIN(sizeof(cfgDescriptor), wLength));\r
559 else if ((wValue & 0xF00) == 0x300) { // Return String Descriptor\r
560 const char *strDescriptor = getStringDescriptor(wValue & 0xff);\r
561 if (strDescriptor != NULL) {\r
562 AT91F_USB_SendData(pUdp, strDescriptor, MIN(strDescriptor[0], wLength));\r
563 } else {\r
564 AT91F_USB_SendStall(pUdp);\r
565 }\r
566 }\r
567 else\r
568 AT91F_USB_SendStall(pUdp);\r
569 break;\r
570 case STD_SET_ADDRESS:\r
571 AT91F_USB_SendZlp(pUdp);\r
572 pUdp->UDP_FADDR = (AT91C_UDP_FEN | wValue);\r
573 pUdp->UDP_GLBSTATE = (wValue) ? AT91C_UDP_FADDEN : 0;\r
574 break;\r
575 case STD_SET_CONFIGURATION:\r
576 btConfiguration = wValue;\r
577 AT91F_USB_SendZlp(pUdp);\r
578 pUdp->UDP_GLBSTATE = (wValue) ? AT91C_UDP_CONFG : AT91C_UDP_FADDEN;\r
579 pUdp->UDP_CSR[AT91C_EP_OUT] = (wValue) ? (AT91C_UDP_EPEDS | AT91C_UDP_EPTYPE_BULK_OUT) : 0;\r
580 pUdp->UDP_CSR[AT91C_EP_IN] = (wValue) ? (AT91C_UDP_EPEDS | AT91C_UDP_EPTYPE_BULK_IN) : 0;\r
581 pUdp->UDP_CSR[AT91C_EP_NOTIFY] = (wValue) ? (AT91C_UDP_EPEDS | AT91C_UDP_EPTYPE_INT_IN) : 0;\r
582 break;\r
583 case STD_GET_CONFIGURATION:\r
584 AT91F_USB_SendData(pUdp, (char *) &(btConfiguration), sizeof(btConfiguration));\r
585 break;\r
586 case STD_GET_STATUS_ZERO:\r
587 wStatus = 0; // Device is Bus powered, remote wakeup disabled\r
588 AT91F_USB_SendData(pUdp, (char *) &wStatus, sizeof(wStatus));\r
589 break;\r
590 case STD_GET_STATUS_INTERFACE:\r
591 wStatus = 0; // reserved for future use\r
592 AT91F_USB_SendData(pUdp, (char *) &wStatus, sizeof(wStatus));\r
593 break;\r
594 case STD_GET_STATUS_ENDPOINT:\r
595 wStatus = 0;\r
596 wIndex &= 0x0F;\r
597 if ((pUdp->UDP_GLBSTATE & AT91C_UDP_CONFG) && (wIndex <= AT91C_EP_NOTIFY)) {\r
598 wStatus = (pUdp->UDP_CSR[wIndex] & AT91C_UDP_EPEDS) ? 0 : 1;\r
599 AT91F_USB_SendData(pUdp, (char *) &wStatus, sizeof(wStatus));\r
600 }\r
601 else if ((pUdp->UDP_GLBSTATE & AT91C_UDP_FADDEN) && (wIndex == AT91C_EP_CONTROL)) {\r
602 wStatus = (pUdp->UDP_CSR[wIndex] & AT91C_UDP_EPEDS) ? 0 : 1;\r
603 AT91F_USB_SendData(pUdp, (char *) &wStatus, sizeof(wStatus));\r
604 }\r
605 else\r
606 AT91F_USB_SendStall(pUdp);\r
607 break;\r
608 case STD_SET_FEATURE_ZERO:\r
609 AT91F_USB_SendStall(pUdp);\r
610 break;\r
611 case STD_SET_FEATURE_INTERFACE:\r
612 AT91F_USB_SendZlp(pUdp);\r
613 break;\r
614 case STD_SET_FEATURE_ENDPOINT:\r
615 wIndex &= 0x0F;\r
616 if ((wValue == 0) && (wIndex >= AT91C_EP_OUT) && (wIndex <= AT91C_EP_NOTIFY)) {\r
617 pUdp->UDP_CSR[wIndex] = 0;\r
618 AT91F_USB_SendZlp(pUdp);\r
619 }\r
620 else\r
621 AT91F_USB_SendStall(pUdp);\r
622 break;\r
623 case STD_CLEAR_FEATURE_ZERO:\r
624 AT91F_USB_SendStall(pUdp);\r
625 break;\r
626 case STD_CLEAR_FEATURE_INTERFACE:\r
627 AT91F_USB_SendZlp(pUdp);\r
628 break;\r
629 case STD_CLEAR_FEATURE_ENDPOINT:\r
630 wIndex &= 0x0F;\r
631 if ((wValue == 0) && (wIndex >= AT91C_EP_OUT) && (wIndex <= AT91C_EP_NOTIFY)) {\r
632 if (wIndex == AT91C_EP_OUT)\r
633 pUdp->UDP_CSR[AT91C_EP_OUT] = (AT91C_UDP_EPEDS | AT91C_UDP_EPTYPE_BULK_OUT);\r
634 else if (wIndex == AT91C_EP_IN)\r
635 pUdp->UDP_CSR[AT91C_EP_IN] = (AT91C_UDP_EPEDS | AT91C_UDP_EPTYPE_BULK_IN);\r
636 else if (wIndex == AT91C_EP_NOTIFY)\r
637 pUdp->UDP_CSR[AT91C_EP_NOTIFY] = (AT91C_UDP_EPEDS | AT91C_UDP_EPTYPE_INT_IN);\r
638 AT91F_USB_SendZlp(pUdp);\r
639 }\r
640 else\r
641 AT91F_USB_SendStall(pUdp);\r
642 break;\r
643\r
644 // handle CDC class requests\r
645 case SET_LINE_CODING:\r
646 while ( !(pUdp->UDP_CSR[AT91C_EP_CONTROL] & AT91C_UDP_RX_DATA_BK0) );\r
647 UDP_CLEAR_EP_FLAGS(AT91C_EP_CONTROL, AT91C_UDP_RX_DATA_BK0);\r
648 AT91F_USB_SendZlp(pUdp);\r
649 break;\r
650 case GET_LINE_CODING:\r
651 AT91F_USB_SendData(pUdp, (char *) &line, MIN(sizeof(line), wLength));\r
652 break;\r
653 case SET_CONTROL_LINE_STATE:\r
654 btConnection = wValue;\r
655 AT91F_USB_SendZlp(pUdp);\r
656 break;\r
657 default:\r
658 AT91F_USB_SendStall(pUdp);\r
659 break;\r
660 }\r
661}\r
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