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5bcc76c4 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
79a73ab2 36#include "config_gpio.h"\r
5bcc76c4 37\r
38#define MIN(a, b) (((a) < (b)) ? (a) : (b))\r
39#define MAX(a, b) (((a) > (b)) ? (a) : (b))\r
40#define AT91C_EP_IN_SIZE 0x40\r
41#define AT91C_EP_OUT 1\r
42#define AT91C_EP_OUT_SIZE 0x40\r
43#define AT91C_EP_IN 2\r
44\r
45const char devDescriptor[] = {\r
46 /* Device descriptor */\r
47 0x12, // bLength\r
48 0x01, // bDescriptorType\r
49 0x10,0x01, // Complies with USB Spec. Release (0110h = release 1.10)\r
50 0x02, // bDeviceClass: CDC class code\r
51 0x00, // bDeviceSubclass: CDC class sub code\r
52 0x00, // bDeviceProtocol: CDC Device protocol\r
53 0x08, // bMaxPacketSize0\r
81ee3409 54 0x2d,0x2d, // Vendor ID (--)\r
55 0x4d,0x50, // Product ID (PM), transmitted in reverse\r
5bcc76c4 56 0x01,0x00, // Device release number (0001)\r
57 0x01, // iManufacturer // 0x01\r
58 0x00, // iProduct\r
59 0x00, // SerialNumber\r
60 0x01 // bNumConfigs\r
61};\r
62\r
63const char cfgDescriptor[] = {\r
64 /* ============== CONFIGURATION 1 =========== */\r
65 /* Configuration 1 descriptor */\r
66 0x09, // CbLength\r
67 0x02, // CbDescriptorType\r
68 0x43, // CwTotalLength 2 EP + Control\r
69 0x00,\r
70 0x02, // CbNumInterfaces\r
71 0x01, // CbConfigurationValue\r
72 0x00, // CiConfiguration\r
73 0xC0, // CbmAttributes 0xA0\r
74 0x00, // CMaxPower\r
75\r
76 /* Communication Class Interface Descriptor Requirement */\r
77 0x09, // bLength\r
78 0x04, // bDescriptorType\r
79 0x00, // bInterfaceNumber\r
80 0x00, // bAlternateSetting\r
81 0x01, // bNumEndpoints\r
82 0x02, // bInterfaceClass\r
83 0x02, // bInterfaceSubclass\r
cfcd8045 84 0x00, // bInterfaceProtocol\r
5bcc76c4 85 0x00, // iInterface\r
86\r
87 /* Header Functional Descriptor */\r
88 0x05, // bFunction Length\r
89 0x24, // bDescriptor type: CS_INTERFACE\r
90 0x00, // bDescriptor subtype: Header Func Desc\r
91 0x10, // bcdCDC:1.1\r
92 0x01,\r
93\r
94 /* ACM Functional Descriptor */\r
95 0x04, // bFunctionLength\r
96 0x24, // bDescriptor Type: CS_INTERFACE\r
97 0x02, // bDescriptor Subtype: ACM Func Desc\r
98 0x00, // bmCapabilities\r
99\r
100 /* Union Functional Descriptor */\r
101 0x05, // bFunctionLength\r
102 0x24, // bDescriptorType: CS_INTERFACE\r
103 0x06, // bDescriptor Subtype: Union Func Desc\r
104 0x00, // bMasterInterface: Communication Class Interface\r
105 0x01, // bSlaveInterface0: Data Class Interface\r
106\r
107 /* Call Management Functional Descriptor */\r
108 0x05, // bFunctionLength\r
109 0x24, // bDescriptor Type: CS_INTERFACE\r
110 0x01, // bDescriptor Subtype: Call Management Func Desc\r
111 0x00, // bmCapabilities: D1 + D0\r
112 0x01, // bDataInterface: Data Class Interface 1\r
113\r
114 /* Endpoint 1 descriptor */\r
115 0x07, // bLength\r
116 0x05, // bDescriptorType\r
117 0x83, // bEndpointAddress, Endpoint 03 - IN\r
118 0x03, // bmAttributes INT\r
119 0x08, // wMaxPacketSize\r
120 0x00,\r
121 0xFF, // bInterval\r
122\r
123 /* Data Class Interface Descriptor Requirement */\r
124 0x09, // bLength\r
125 0x04, // bDescriptorType\r
126 0x01, // bInterfaceNumber\r
127 0x00, // bAlternateSetting\r
128 0x02, // bNumEndpoints\r
129 0x0A, // bInterfaceClass\r
130 0x00, // bInterfaceSubclass\r
131 0x00, // bInterfaceProtocol\r
132 0x00, // iInterface\r
133\r
134 /* First alternate setting */\r
135 /* Endpoint 1 descriptor */\r
136 0x07, // bLength\r
137 0x05, // bDescriptorType\r
138 0x01, // bEndpointAddress, Endpoint 01 - OUT\r
139 0x02, // bmAttributes BULK\r
140 AT91C_EP_OUT_SIZE, // wMaxPacketSize\r
141 0x00,\r
142 0x00, // bInterval\r
143\r
144 /* Endpoint 2 descriptor */\r
145 0x07, // bLength\r
146 0x05, // bDescriptorType\r
147 0x82, // bEndpointAddress, Endpoint 02 - IN\r
148 0x02, // bmAttributes BULK\r
149 AT91C_EP_IN_SIZE, // wMaxPacketSize\r
150 0x00,\r
151 0x00 // bInterval\r
152};\r
153\r
154const char strDescriptor[] = {\r
155 26, // Length\r
156 0x03, // Type is string\r
157 'p', 0x00,\r
158 'r', 0x00,\r
159 'o', 0x00,\r
160 'x', 0x00,\r
161 'm', 0x00,\r
162 'a', 0x00,\r
163 'r', 0x00,\r
164 'k', 0x00,\r
165 '.', 0x00,\r
166 'o', 0x00,\r
167 'r', 0x00,\r
168 'g', 0x00,\r
169};\r
170\r
171\r
172/* USB standard request code */\r
173#define STD_GET_STATUS_ZERO 0x0080\r
174#define STD_GET_STATUS_INTERFACE 0x0081\r
175#define STD_GET_STATUS_ENDPOINT 0x0082\r
176\r
177#define STD_CLEAR_FEATURE_ZERO 0x0100\r
178#define STD_CLEAR_FEATURE_INTERFACE 0x0101\r
179#define STD_CLEAR_FEATURE_ENDPOINT 0x0102\r
180\r
181#define STD_SET_FEATURE_ZERO 0x0300\r
182#define STD_SET_FEATURE_INTERFACE 0x0301\r
183#define STD_SET_FEATURE_ENDPOINT 0x0302\r
184\r
185#define STD_SET_ADDRESS 0x0500\r
186#define STD_GET_DESCRIPTOR 0x0680\r
187#define STD_SET_DESCRIPTOR 0x0700\r
188#define STD_GET_CONFIGURATION 0x0880\r
189#define STD_SET_CONFIGURATION 0x0900\r
190#define STD_GET_INTERFACE 0x0A81\r
191#define STD_SET_INTERFACE 0x0B01\r
192#define STD_SYNCH_FRAME 0x0C82\r
193\r
194/* CDC Class Specific Request Code */\r
195#define GET_LINE_CODING 0x21A1\r
196#define SET_LINE_CODING 0x2021\r
197#define SET_CONTROL_LINE_STATE 0x2221\r
198\r
199typedef struct {\r
200 unsigned int dwDTERRate;\r
201 char bCharFormat;\r
202 char bParityType;\r
203 char bDataBits;\r
204} AT91S_CDC_LINE_CODING, *AT91PS_CDC_LINE_CODING;\r
205\r
206AT91S_CDC_LINE_CODING line = {\r
207 115200, // baudrate\r
208 0, // 1 Stop Bit\r
209 0, // None Parity\r
210 8}; // 8 Data bits\r
211\r
212void AT91F_CDC_Enumerate();\r
213\r
214AT91PS_UDP pUdp = AT91C_BASE_UDP;\r
215byte_t btConfiguration = 0;\r
216byte_t btConnection = 0;\r
217byte_t btReceiveBank = AT91C_UDP_RX_DATA_BK0;\r
218\r
6e82300d 219//*----------------------------------------------------------------------------\r
79a73ab2 220//* \fn usb_disable\r
6e82300d 221//* \brief This function deactivates the USB device\r
222//*----------------------------------------------------------------------------\r
223void usb_disable() {\r
79a73ab2 224 // Disconnect the USB device\r
225 AT91C_BASE_PIOA->PIO_ODR = GPIO_USB_PU;\r
6e82300d 226 \r
227 // Clear all lingering interrupts\r
228 if(pUdp->UDP_ISR & AT91C_UDP_ENDBUSRES) {\r
229 pUdp->UDP_ICR = AT91C_UDP_ENDBUSRES;\r
230 }\r
231}\r
232\r
5bcc76c4 233//*----------------------------------------------------------------------------\r
79a73ab2 234//* \fn usb_enable\r
5bcc76c4 235//* \brief This function Activates the USB device\r
236//*----------------------------------------------------------------------------\r
6e82300d 237void usb_enable() {\r
5bcc76c4 238 // Set the PLL USB Divider\r
239 AT91C_BASE_CKGR->CKGR_PLLR |= AT91C_CKGR_USBDIV_1 ;\r
240 \r
241 // Specific Chip USB Initialisation\r
242 // Enables the 48MHz USB clock UDPCK and System Peripheral USB Clock\r
243 AT91C_BASE_PMC->PMC_SCER = AT91C_PMC_UDP;\r
244 AT91C_BASE_PMC->PMC_PCER = (1 << AT91C_ID_UDP);\r
245 \r
246 // Enable UDP PullUp (USB_DP_PUP) : enable & Clear of the corresponding PIO\r
247 // Set in PIO mode and Configure in Output\r
79a73ab2 248 AT91C_BASE_PIOA->PIO_PER = GPIO_USB_PU; // Set in PIO mode\r
249 AT91C_BASE_PIOA->PIO_OER = GPIO_USB_PU; // Configure as Output\r
5bcc76c4 250 \r
79a73ab2 251 // Clear for set the Pullup resistor\r
252 AT91C_BASE_PIOA->PIO_CODR = GPIO_USB_PU;\r
6e82300d 253 \r
79a73ab2 254 // Disconnect and reconnect USB controller for 100ms\r
6e82300d 255 usb_disable();\r
256 \r
257 // Wait for a short while\r
28fdb04f 258 for (volatile size_t i=0; i<0x100000; i++);\r
6e82300d 259\r
260 // Reconnect USB reconnect\r
79a73ab2 261 AT91C_BASE_PIOA->PIO_SODR = GPIO_USB_PU;\r
262 AT91C_BASE_PIOA->PIO_OER = GPIO_USB_PU;\r
5bcc76c4 263}\r
264\r
265//*----------------------------------------------------------------------------\r
79a73ab2 266//* \fn usb_check\r
5bcc76c4 267//* \brief Test if the device is configured and handle enumeration\r
268//*----------------------------------------------------------------------------\r
6e82300d 269bool usb_check() {\r
5bcc76c4 270 AT91_REG isr = pUdp->UDP_ISR;\r
271\r
272 if (isr & AT91C_UDP_ENDBUSRES) {\r
273 pUdp->UDP_ICR = AT91C_UDP_ENDBUSRES;\r
274 // reset all endpoints\r
275 pUdp->UDP_RSTEP = (unsigned int)-1;\r
276 pUdp->UDP_RSTEP = 0;\r
277 // Enable the function\r
278 pUdp->UDP_FADDR = AT91C_UDP_FEN;\r
279 // Configure endpoint 0\r
280 pUdp->UDP_CSR[0] = (AT91C_UDP_EPEDS | AT91C_UDP_EPTYPE_CTRL);\r
281 }\r
282 else if (isr & AT91C_UDP_EPINT0) {\r
283 pUdp->UDP_ICR = AT91C_UDP_EPINT0;\r
284 AT91F_CDC_Enumerate();\r
285 }\r
286 return (btConfiguration) ? true : false;\r
287}\r
288\r
289\r
290bool usb_poll()\r
291{\r
292 if (!usb_check()) return false;\r
293 return (pUdp->UDP_CSR[AT91C_EP_OUT] & btReceiveBank);\r
294}\r
295\r
83f3f8ac
MHS		 296/**\r
297 In github PR #129, some users appears to get a false positive from\r
298 usb_poll, which returns true, but the usb_read operation\r
299 still returns 0.\r
300 This check is basically the same as above, but also checks\r
301 that the length available to read is non-zero, thus hopefully fixes the\r
302 bug.\r
303**/\r
304bool usb_poll_validate_length()\r
305{\r
306\r
307 if (!usb_check()) return false;\r
308 if (!(pUdp->UDP_CSR[AT91C_EP_OUT] & btReceiveBank)) return false;\r
309 return (pUdp->UDP_CSR[AT91C_EP_OUT] >> 16) > 0;\r
310}\r
311\r
5bcc76c4 312//*----------------------------------------------------------------------------\r
79a73ab2 313//* \fn usb_read\r
5bcc76c4 314//* \brief Read available data from Endpoint OUT\r
315//*----------------------------------------------------------------------------\r
6e82300d 316uint32_t usb_read(byte_t* data, size_t len) {\r
d2deaf7b 317 byte_t bank = btReceiveBank;\r
5bcc76c4 318 uint32_t packetSize, nbBytesRcv = 0;\r
d2deaf7b 319 uint32_t time_out = 0;\r
5bcc76c4 320 \r
23b598ee 321 while (len) {\r
5bcc76c4 322 if (!usb_check()) break;\r
323\r
324 if ( pUdp->UDP_CSR[AT91C_EP_OUT] & bank ) {\r
325 packetSize = MIN(pUdp->UDP_CSR[AT91C_EP_OUT] >> 16, len);\r
d2deaf7b 326 len -= packetSize;\r
5bcc76c4 327 while(packetSize--)\r
328 data[nbBytesRcv++] = pUdp->UDP_FDR[AT91C_EP_OUT];\r
329 pUdp->UDP_CSR[AT91C_EP_OUT] &= ~(bank);\r
23b598ee 330 if (bank == AT91C_UDP_RX_DATA_BK0) {\r
5bcc76c4 331 bank = AT91C_UDP_RX_DATA_BK1;\r
d2deaf7b 332 } else {\r
5bcc76c4 333 bank = AT91C_UDP_RX_DATA_BK0;\r
d2deaf7b 334 }\r
5bcc76c4 335 }\r
d2deaf7b 336 if (time_out++ == 0x1fff) break;\r
5bcc76c4 337 }\r
338\r
339 btReceiveBank = bank;\r
340 return nbBytesRcv;\r
341}\r
342\r
343//*----------------------------------------------------------------------------\r
79a73ab2 344//* \fn usb_write\r
5bcc76c4 345//* \brief Send through endpoint 2\r
346//*----------------------------------------------------------------------------\r
6e82300d 347uint32_t usb_write(const byte_t* data, const size_t len) {\r
5bcc76c4 348 size_t length = len;\r
349 uint32_t cpt = 0;\r
350\r
351 if (!length) return 0;\r
352 if (!usb_check()) return 0;\r
353 \r
354 // Send the first packet\r
355 cpt = MIN(length, AT91C_EP_IN_SIZE-1);\r
356 length -= cpt;\r
357 while (cpt--) pUdp->UDP_FDR[AT91C_EP_IN] = *data++;\r
358 pUdp->UDP_CSR[AT91C_EP_IN] |= AT91C_UDP_TXPKTRDY;\r
359\r
360 while (length) {\r
361 // Fill the second bank\r
362 cpt = MIN(length, AT91C_EP_IN_SIZE-1);\r
363 length -= cpt;\r
364 while (cpt--) pUdp->UDP_FDR[AT91C_EP_IN] = *data++;\r
365 // Wait for the the first bank to be sent\r
366 while (!(pUdp->UDP_CSR[AT91C_EP_IN] & AT91C_UDP_TXCOMP)) {\r
367 if (!usb_check()) return length;\r
368 }\r
369 pUdp->UDP_CSR[AT91C_EP_IN] &= ~(AT91C_UDP_TXCOMP);\r
370 while (pUdp->UDP_CSR[AT91C_EP_IN] & AT91C_UDP_TXCOMP);\r
371 pUdp->UDP_CSR[AT91C_EP_IN] |= AT91C_UDP_TXPKTRDY;\r
372 }\r
373 \r
374 // Wait for the end of transfer\r
375 while (!(pUdp->UDP_CSR[AT91C_EP_IN] & AT91C_UDP_TXCOMP)) {\r
376 if (!usb_check()) return length;\r
377 }\r
378 \r
379 pUdp->UDP_CSR[AT91C_EP_IN] &= ~(AT91C_UDP_TXCOMP);\r
380 while (pUdp->UDP_CSR[AT91C_EP_IN] & AT91C_UDP_TXCOMP);\r
381\r
382 return length;\r
383}\r
384\r
385//*----------------------------------------------------------------------------\r
386//* \fn AT91F_USB_SendData\r
387//* \brief Send Data through the control endpoint\r
388//*----------------------------------------------------------------------------\r
5ee70129 389unsigned int csrTab[100] = {0x00};\r
5bcc76c4 390unsigned char csrIdx = 0;\r
391\r
6e82300d 392static void AT91F_USB_SendData(AT91PS_UDP pUdp, const char *pData, uint32_t length) {\r
5bcc76c4 393 uint32_t cpt = 0;\r
394 AT91_REG csr;\r
395\r
396 do {\r
397 cpt = MIN(length, 8);\r
398 length -= cpt;\r
399\r
400 while (cpt--)\r
401 pUdp->UDP_FDR[0] = *pData++;\r
402\r
403 if (pUdp->UDP_CSR[0] & AT91C_UDP_TXCOMP) {\r
404 pUdp->UDP_CSR[0] &= ~(AT91C_UDP_TXCOMP);\r
405 while (pUdp->UDP_CSR[0] & AT91C_UDP_TXCOMP);\r
406 }\r
407\r
408 pUdp->UDP_CSR[0] |= AT91C_UDP_TXPKTRDY;\r
409 do {\r
410 csr = pUdp->UDP_CSR[0];\r
411\r
412 // Data IN stage has been stopped by a status OUT\r
413 if (csr & AT91C_UDP_RX_DATA_BK0) {\r
414 pUdp->UDP_CSR[0] &= ~(AT91C_UDP_RX_DATA_BK0);\r
415 return;\r
416 }\r
417 } while ( !(csr & AT91C_UDP_TXCOMP) );\r
418\r
419 } while (length);\r
420\r
421 if (pUdp->UDP_CSR[0] & AT91C_UDP_TXCOMP) {\r
422 pUdp->UDP_CSR[0] &= ~(AT91C_UDP_TXCOMP);\r
423 while (pUdp->UDP_CSR[0] & AT91C_UDP_TXCOMP);\r
424 }\r
425}\r
426\r
427//*----------------------------------------------------------------------------\r
428//* \fn AT91F_USB_SendZlp\r
429//* \brief Send zero length packet through the control endpoint\r
430//*----------------------------------------------------------------------------\r
6e82300d 431void AT91F_USB_SendZlp(AT91PS_UDP pUdp) {\r
5bcc76c4 432 pUdp->UDP_CSR[0] |= AT91C_UDP_TXPKTRDY;\r
433 while ( !(pUdp->UDP_CSR[0] & AT91C_UDP_TXCOMP) );\r
434 pUdp->UDP_CSR[0] &= ~(AT91C_UDP_TXCOMP);\r
435 while (pUdp->UDP_CSR[0] & AT91C_UDP_TXCOMP);\r
436}\r
437\r
438//*----------------------------------------------------------------------------\r
439//* \fn AT91F_USB_SendStall\r
440//* \brief Stall the control endpoint\r
441//*----------------------------------------------------------------------------\r
6e82300d 442void AT91F_USB_SendStall(AT91PS_UDP pUdp) {\r
5bcc76c4 443 pUdp->UDP_CSR[0] |= AT91C_UDP_FORCESTALL;\r
444 while ( !(pUdp->UDP_CSR[0] & AT91C_UDP_ISOERROR) );\r
445 pUdp->UDP_CSR[0] &= ~(AT91C_UDP_FORCESTALL | AT91C_UDP_ISOERROR);\r
446 while (pUdp->UDP_CSR[0] & (AT91C_UDP_FORCESTALL | AT91C_UDP_ISOERROR));\r
447}\r
448\r
449//*----------------------------------------------------------------------------\r
450//* \fn AT91F_CDC_Enumerate\r
451//* \brief This function is a callback invoked when a SETUP packet is received\r
452//*----------------------------------------------------------------------------\r
6e82300d 453void AT91F_CDC_Enumerate() {\r
5bcc76c4 454 byte_t bmRequestType, bRequest;\r
455 uint16_t wValue, wIndex, wLength, wStatus;\r
456\r
457 if ( !(pUdp->UDP_CSR[0] & AT91C_UDP_RXSETUP) )\r
458 return;\r
459\r
460 bmRequestType = pUdp->UDP_FDR[0];\r
461 bRequest = pUdp->UDP_FDR[0];\r
462 wValue = (pUdp->UDP_FDR[0] & 0xFF);\r
463 wValue |= (pUdp->UDP_FDR[0] << 8);\r
464 wIndex = (pUdp->UDP_FDR[0] & 0xFF);\r
465 wIndex |= (pUdp->UDP_FDR[0] << 8);\r
466 wLength = (pUdp->UDP_FDR[0] & 0xFF);\r
467 wLength |= (pUdp->UDP_FDR[0] << 8);\r
468\r
469 if (bmRequestType & 0x80) {\r
470 pUdp->UDP_CSR[0] |= AT91C_UDP_DIR;\r
471 while ( !(pUdp->UDP_CSR[0] & AT91C_UDP_DIR) );\r
472 }\r
473 pUdp->UDP_CSR[0] &= ~AT91C_UDP_RXSETUP;\r
474 while ( (pUdp->UDP_CSR[0] & AT91C_UDP_RXSETUP) );\r
475\r
476 // Handle supported standard device request Cf Table 9-3 in USB specification Rev 1.1\r
477 switch ((bRequest << 8) | bmRequestType) {\r
478 case STD_GET_DESCRIPTOR:\r
479 if (wValue == 0x100) // Return Device Descriptor\r
480 AT91F_USB_SendData(pUdp, devDescriptor, MIN(sizeof(devDescriptor), wLength));\r
481 else if (wValue == 0x200) // Return Configuration Descriptor\r
482 AT91F_USB_SendData(pUdp, cfgDescriptor, MIN(sizeof(cfgDescriptor), wLength));\r
483 else if ((wValue & 0x300) == 0x300) // Return String Descriptor\r
484 AT91F_USB_SendData(pUdp, strDescriptor, MIN(sizeof(strDescriptor), wLength));\r
485 else\r
486 AT91F_USB_SendStall(pUdp);\r
487 break;\r
488 case STD_SET_ADDRESS:\r
489 AT91F_USB_SendZlp(pUdp);\r
490 pUdp->UDP_FADDR = (AT91C_UDP_FEN | wValue);\r
491 pUdp->UDP_GLBSTATE = (wValue) ? AT91C_UDP_FADDEN : 0;\r
492 break;\r
493 case STD_SET_CONFIGURATION:\r
494 btConfiguration = wValue;\r
495 AT91F_USB_SendZlp(pUdp);\r
496 pUdp->UDP_GLBSTATE = (wValue) ? AT91C_UDP_CONFG : AT91C_UDP_FADDEN;\r
497 pUdp->UDP_CSR[1] = (wValue) ? (AT91C_UDP_EPEDS | AT91C_UDP_EPTYPE_BULK_OUT) : 0;\r
498 pUdp->UDP_CSR[2] = (wValue) ? (AT91C_UDP_EPEDS | AT91C_UDP_EPTYPE_BULK_IN) : 0;\r
499 pUdp->UDP_CSR[3] = (wValue) ? (AT91C_UDP_EPEDS | AT91C_UDP_EPTYPE_INT_IN) : 0;\r
500 break;\r
501 case STD_GET_CONFIGURATION:\r
502 AT91F_USB_SendData(pUdp, (char *) &(btConfiguration), sizeof(btConfiguration));\r
503 break;\r
504 case STD_GET_STATUS_ZERO:\r
505 wStatus = 0;\r
506 AT91F_USB_SendData(pUdp, (char *) &wStatus, sizeof(wStatus));\r
507 break;\r
508 case STD_GET_STATUS_INTERFACE:\r
509 wStatus = 0;\r
510 AT91F_USB_SendData(pUdp, (char *) &wStatus, sizeof(wStatus));\r
511 break;\r
512 case STD_GET_STATUS_ENDPOINT:\r
513 wStatus = 0;\r
514 wIndex &= 0x0F;\r
515 if ((pUdp->UDP_GLBSTATE & AT91C_UDP_CONFG) && (wIndex <= 3)) {\r
516 wStatus = (pUdp->UDP_CSR[wIndex] & AT91C_UDP_EPEDS) ? 0 : 1;\r
517 AT91F_USB_SendData(pUdp, (char *) &wStatus, sizeof(wStatus));\r
518 }\r
519 else if ((pUdp->UDP_GLBSTATE & AT91C_UDP_FADDEN) && (wIndex == 0)) {\r
520 wStatus = (pUdp->UDP_CSR[wIndex] & AT91C_UDP_EPEDS) ? 0 : 1;\r
521 AT91F_USB_SendData(pUdp, (char *) &wStatus, sizeof(wStatus));\r
522 }\r
523 else\r
524 AT91F_USB_SendStall(pUdp);\r
525 break;\r
526 case STD_SET_FEATURE_ZERO:\r
527 AT91F_USB_SendStall(pUdp);\r
528 break;\r
529 case STD_SET_FEATURE_INTERFACE:\r
530 AT91F_USB_SendZlp(pUdp);\r
531 break;\r
532 case STD_SET_FEATURE_ENDPOINT:\r
533 wIndex &= 0x0F;\r
534 if ((wValue == 0) && wIndex && (wIndex <= 3)) {\r
535 pUdp->UDP_CSR[wIndex] = 0;\r
536 AT91F_USB_SendZlp(pUdp);\r
537 }\r
538 else\r
539 AT91F_USB_SendStall(pUdp);\r
540 break;\r
541 case STD_CLEAR_FEATURE_ZERO:\r
542 AT91F_USB_SendStall(pUdp);\r
543 break;\r
544 case STD_CLEAR_FEATURE_INTERFACE:\r
545 AT91F_USB_SendZlp(pUdp);\r
546 break;\r
547 case STD_CLEAR_FEATURE_ENDPOINT:\r
548 wIndex &= 0x0F;\r
549 if ((wValue == 0) && wIndex && (wIndex <= 3)) {\r
550 if (wIndex == 1)\r
551 pUdp->UDP_CSR[1] = (AT91C_UDP_EPEDS | AT91C_UDP_EPTYPE_BULK_OUT);\r
552 else if (wIndex == 2)\r
553 pUdp->UDP_CSR[2] = (AT91C_UDP_EPEDS | AT91C_UDP_EPTYPE_BULK_IN);\r
554 else if (wIndex == 3)\r
555 pUdp->UDP_CSR[3] = (AT91C_UDP_EPEDS | AT91C_UDP_EPTYPE_ISO_IN);\r
556 AT91F_USB_SendZlp(pUdp);\r
557 }\r
558 else\r
559 AT91F_USB_SendStall(pUdp);\r
560 break;\r
561\r
562 // handle CDC class requests\r
563 case SET_LINE_CODING:\r
564 while ( !(pUdp->UDP_CSR[0] & AT91C_UDP_RX_DATA_BK0) );\r
565 pUdp->UDP_CSR[0] &= ~(AT91C_UDP_RX_DATA_BK0);\r
566 AT91F_USB_SendZlp(pUdp);\r
567 break;\r
568 case GET_LINE_CODING:\r
569 AT91F_USB_SendData(pUdp, (char *) &line, MIN(sizeof(line), wLength));\r
570 break;\r
571 case SET_CONTROL_LINE_STATE:\r
572 btConnection = wValue;\r
573 AT91F_USB_SendZlp(pUdp);\r
574 break;\r
575 default:\r
576 AT91F_USB_SendStall(pUdp);\r
577 break;\r
578 }\r
579}\r
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