| 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 |
| 52 | static 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 |
| 70 | static 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 | 0xC0, // CbmAttributes 0xA0\r |
| 81 | 0xFA, // CMaxPower\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 |
| 160 | static 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 |
| 168 | static 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 |
| 185 | static const char StrDescProduct[] = {\r |
| 186 | 8, // Length\r |
| 187 | 0x03, // Type is string\r |
| 188 | 'P', 0x00,\r |
| 189 | 'M', 0x00,\r |
| 190 | '3', 0x00\r |
| 191 | };\r |
| 192 | \r |
| 193 | const char* getStringDescriptor(uint8_t idx)\r |
| 194 | {\r |
| 195 | switch (idx) {\r |
| 196 | case STR_LANGUAGE_CODES:\r |
| 197 | return StrDescLanguageCodes;\r |
| 198 | case STR_MANUFACTURER:\r |
| 199 | return StrDescManufacturer;\r |
| 200 | case STR_PRODUCT:\r |
| 201 | return StrDescProduct;\r |
| 202 | default:\r |
| 203 | return NULL;\r |
| 204 | }\r |
| 205 | }\r |
| 206 | \r |
| 207 | // Bitmap for all status bits in CSR which must be written as 1 to cause no effect\r |
| 208 | #define REG_NO_EFFECT_1_ALL AT91C_UDP_RX_DATA_BK0 | AT91C_UDP_RX_DATA_BK1 \\r |
| 209 | |AT91C_UDP_STALLSENT | AT91C_UDP_RXSETUP \\r |
| 210 | |AT91C_UDP_TXCOMP\r |
| 211 | \r |
| 212 | // Clear flags in the UDP_CSR register\r |
| 213 | #define UDP_CLEAR_EP_FLAGS(endpoint, flags) { \\r |
| 214 | volatile unsigned int reg; \\r |
| 215 | reg = pUdp->UDP_CSR[(endpoint)]; \\r |
| 216 | reg |= REG_NO_EFFECT_1_ALL; \\r |
| 217 | reg &= ~(flags); \\r |
| 218 | pUdp->UDP_CSR[(endpoint)] = reg; \\r |
| 219 | } \r |
| 220 | \r |
| 221 | // Set flags in the UDP_CSR register\r |
| 222 | #define UDP_SET_EP_FLAGS(endpoint, flags) { \\r |
| 223 | volatile unsigned int reg; \\r |
| 224 | reg = pUdp->UDP_CSR[(endpoint)]; \\r |
| 225 | reg |= REG_NO_EFFECT_1_ALL; \\r |
| 226 | reg |= (flags); \\r |
| 227 | pUdp->UDP_CSR[(endpoint)] = reg; \\r |
| 228 | }\r |
| 229 | \r |
| 230 | /* USB standard request codes */\r |
| 231 | #define STD_GET_STATUS_ZERO 0x0080\r |
| 232 | #define STD_GET_STATUS_INTERFACE 0x0081\r |
| 233 | #define STD_GET_STATUS_ENDPOINT 0x0082\r |
| 234 | \r |
| 235 | #define STD_CLEAR_FEATURE_ZERO 0x0100\r |
| 236 | #define STD_CLEAR_FEATURE_INTERFACE 0x0101\r |
| 237 | #define STD_CLEAR_FEATURE_ENDPOINT 0x0102\r |
| 238 | \r |
| 239 | #define STD_SET_FEATURE_ZERO 0x0300\r |
| 240 | #define STD_SET_FEATURE_INTERFACE 0x0301\r |
| 241 | #define STD_SET_FEATURE_ENDPOINT 0x0302\r |
| 242 | \r |
| 243 | #define STD_SET_ADDRESS 0x0500\r |
| 244 | #define STD_GET_DESCRIPTOR 0x0680\r |
| 245 | #define STD_SET_DESCRIPTOR 0x0700\r |
| 246 | #define STD_GET_CONFIGURATION 0x0880\r |
| 247 | #define STD_SET_CONFIGURATION 0x0900\r |
| 248 | #define STD_GET_INTERFACE 0x0A81\r |
| 249 | #define STD_SET_INTERFACE 0x0B01\r |
| 250 | #define STD_SYNCH_FRAME 0x0C82\r |
| 251 | \r |
| 252 | /* CDC Class Specific Request Code */\r |
| 253 | #define GET_LINE_CODING 0x21A1\r |
| 254 | #define SET_LINE_CODING 0x2021\r |
| 255 | #define SET_CONTROL_LINE_STATE 0x2221\r |
| 256 | \r |
| 257 | typedef struct {\r |
| 258 | unsigned int dwDTERRate;\r |
| 259 | char bCharFormat;\r |
| 260 | char bParityType;\r |
| 261 | char bDataBits;\r |
| 262 | } AT91S_CDC_LINE_CODING, *AT91PS_CDC_LINE_CODING;\r |
| 263 | \r |
| 264 | AT91S_CDC_LINE_CODING line = {\r |
| 265 | 115200, // baudrate\r |
| 266 | 0, // 1 Stop Bit\r |
| 267 | 0, // None Parity\r |
| 268 | 8}; // 8 Data bits\r |
| 269 | \r |
| 270 | \r |
| 271 | void AT91F_CDC_Enumerate();\r |
| 272 | \r |
| 273 | AT91PS_UDP pUdp = AT91C_BASE_UDP;\r |
| 274 | byte_t btConfiguration = 0;\r |
| 275 | byte_t btConnection = 0;\r |
| 276 | byte_t btReceiveBank = AT91C_UDP_RX_DATA_BK0;\r |
| 277 | \r |
| 278 | \r |
| 279 | //*----------------------------------------------------------------------------\r |
| 280 | //* \fn usb_disable\r |
| 281 | //* \brief This function deactivates the USB device\r |
| 282 | //*----------------------------------------------------------------------------\r |
| 283 | void usb_disable() {\r |
| 284 | // Disconnect the USB device\r |
| 285 | AT91C_BASE_PIOA->PIO_ODR = GPIO_USB_PU;\r |
| 286 | \r |
| 287 | // Clear all lingering interrupts\r |
| 288 | if(pUdp->UDP_ISR & AT91C_UDP_ENDBUSRES) {\r |
| 289 | pUdp->UDP_ICR = AT91C_UDP_ENDBUSRES;\r |
| 290 | }\r |
| 291 | }\r |
| 292 | \r |
| 293 | \r |
| 294 | //*----------------------------------------------------------------------------\r |
| 295 | //* \fn usb_enable\r |
| 296 | //* \brief This function Activates the USB device\r |
| 297 | //*----------------------------------------------------------------------------\r |
| 298 | void usb_enable() {\r |
| 299 | // Set the PLL USB Divider\r |
| 300 | AT91C_BASE_CKGR->CKGR_PLLR |= AT91C_CKGR_USBDIV_1 ;\r |
| 301 | \r |
| 302 | // Specific Chip USB Initialisation\r |
| 303 | // Enables the 48MHz USB clock UDPCK and System Peripheral USB Clock\r |
| 304 | AT91C_BASE_PMC->PMC_SCER = AT91C_PMC_UDP;\r |
| 305 | AT91C_BASE_PMC->PMC_PCER = (1 << AT91C_ID_UDP);\r |
| 306 | \r |
| 307 | // Enable UDP PullUp (USB_DP_PUP) : enable & Clear of the corresponding PIO\r |
| 308 | // Set in PIO mode and Configure in Output\r |
| 309 | AT91C_BASE_PIOA->PIO_PER = GPIO_USB_PU; // Set in PIO mode\r |
| 310 | AT91C_BASE_PIOA->PIO_OER = GPIO_USB_PU; // Configure as Output\r |
| 311 | \r |
| 312 | // Clear for set the Pullup resistor\r |
| 313 | AT91C_BASE_PIOA->PIO_CODR = GPIO_USB_PU;\r |
| 314 | \r |
| 315 | // Disconnect and reconnect USB controller for 100ms\r |
| 316 | usb_disable();\r |
| 317 | \r |
| 318 | // Wait for a short while\r |
| 319 | for (volatile size_t i=0; i<0x100000; i++);\r |
| 320 | \r |
| 321 | // Reconnect USB reconnect\r |
| 322 | AT91C_BASE_PIOA->PIO_SODR = GPIO_USB_PU;\r |
| 323 | AT91C_BASE_PIOA->PIO_OER = GPIO_USB_PU;\r |
| 324 | }\r |
| 325 | \r |
| 326 | \r |
| 327 | //*----------------------------------------------------------------------------\r |
| 328 | //* \fn usb_check\r |
| 329 | //* \brief Test if the device is configured and handle enumeration\r |
| 330 | //*----------------------------------------------------------------------------\r |
| 331 | bool usb_check() {\r |
| 332 | AT91_REG isr = pUdp->UDP_ISR;\r |
| 333 | \r |
| 334 | if (isr & AT91C_UDP_ENDBUSRES) {\r |
| 335 | pUdp->UDP_ICR = AT91C_UDP_ENDBUSRES;\r |
| 336 | // reset all endpoints\r |
| 337 | pUdp->UDP_RSTEP = (unsigned int)-1;\r |
| 338 | pUdp->UDP_RSTEP = 0;\r |
| 339 | // Enable the function\r |
| 340 | pUdp->UDP_FADDR = AT91C_UDP_FEN;\r |
| 341 | // Configure endpoint 0\r |
| 342 | pUdp->UDP_CSR[AT91C_EP_CONTROL] = (AT91C_UDP_EPEDS | AT91C_UDP_EPTYPE_CTRL);\r |
| 343 | } else if (isr & AT91C_UDP_EPINT0) {\r |
| 344 | pUdp->UDP_ICR = AT91C_UDP_EPINT0;\r |
| 345 | AT91F_CDC_Enumerate();\r |
| 346 | }\r |
| 347 | return (btConfiguration) ? true : false;\r |
| 348 | }\r |
| 349 | \r |
| 350 | \r |
| 351 | bool usb_poll()\r |
| 352 | {\r |
| 353 | if (!usb_check()) return false;\r |
| 354 | return (pUdp->UDP_CSR[AT91C_EP_OUT] & btReceiveBank);\r |
| 355 | }\r |
| 356 | \r |
| 357 | \r |
| 358 | /**\r |
| 359 | In github PR #129, some users appears to get a false positive from\r |
| 360 | usb_poll, which returns true, but the usb_read operation\r |
| 361 | still returns 0.\r |
| 362 | This check is basically the same as above, but also checks\r |
| 363 | that the length available to read is non-zero, thus hopefully fixes the\r |
| 364 | bug.\r |
| 365 | **/\r |
| 366 | bool usb_poll_validate_length()\r |
| 367 | {\r |
| 368 | if (!usb_check()) return false;\r |
| 369 | if (!(pUdp->UDP_CSR[AT91C_EP_OUT] & btReceiveBank)) return false;\r |
| 370 | return (pUdp->UDP_CSR[AT91C_EP_OUT] >> 16) > 0;\r |
| 371 | }\r |
| 372 | \r |
| 373 | //*----------------------------------------------------------------------------\r |
| 374 | //* \fn usb_read\r |
| 375 | //* \brief Read available data from Endpoint OUT\r |
| 376 | //*----------------------------------------------------------------------------\r |
| 377 | uint32_t usb_read(byte_t* data, size_t len) {\r |
| 378 | byte_t bank = btReceiveBank;\r |
| 379 | uint32_t packetSize, nbBytesRcv = 0;\r |
| 380 | uint32_t time_out = 0;\r |
| 381 | \r |
| 382 | while (len) {\r |
| 383 | if (!usb_check()) break;\r |
| 384 | \r |
| 385 | if ( pUdp->UDP_CSR[AT91C_EP_OUT] & bank ) {\r |
| 386 | packetSize = MIN(pUdp->UDP_CSR[AT91C_EP_OUT] >> 16, len);\r |
| 387 | len -= packetSize;\r |
| 388 | while(packetSize--)\r |
| 389 | data[nbBytesRcv++] = pUdp->UDP_FDR[AT91C_EP_OUT];\r |
| 390 | UDP_CLEAR_EP_FLAGS(AT91C_EP_OUT, bank);\r |
| 391 | if (bank == AT91C_UDP_RX_DATA_BK0) {\r |
| 392 | bank = AT91C_UDP_RX_DATA_BK1;\r |
| 393 | } else {\r |
| 394 | bank = AT91C_UDP_RX_DATA_BK0;\r |
| 395 | }\r |
| 396 | }\r |
| 397 | if (time_out++ == 0x1fff) break;\r |
| 398 | }\r |
| 399 | \r |
| 400 | btReceiveBank = bank;\r |
| 401 | return nbBytesRcv;\r |
| 402 | }\r |
| 403 | \r |
| 404 | \r |
| 405 | //*----------------------------------------------------------------------------\r |
| 406 | //* \fn usb_write\r |
| 407 | //* \brief Send through endpoint 2\r |
| 408 | //*----------------------------------------------------------------------------\r |
| 409 | uint32_t usb_write(const byte_t* data, const size_t len) {\r |
| 410 | size_t length = len;\r |
| 411 | uint32_t cpt = 0;\r |
| 412 | \r |
| 413 | if (!length) return 0;\r |
| 414 | if (!usb_check()) return 0;\r |
| 415 | \r |
| 416 | // Send the first packet\r |
| 417 | cpt = MIN(length, AT91C_EP_IN_SIZE);\r |
| 418 | length -= cpt;\r |
| 419 | while (cpt--) {\r |
| 420 | pUdp->UDP_FDR[AT91C_EP_IN] = *data++;\r |
| 421 | }\r |
| 422 | UDP_SET_EP_FLAGS(AT91C_EP_IN, AT91C_UDP_TXPKTRDY);\r |
| 423 | \r |
| 424 | while (length) {\r |
| 425 | // Fill the next bank\r |
| 426 | cpt = MIN(length, AT91C_EP_IN_SIZE);\r |
| 427 | length -= cpt;\r |
| 428 | while (cpt--) {\r |
| 429 | pUdp->UDP_FDR[AT91C_EP_IN] = *data++;\r |
| 430 | }\r |
| 431 | // Wait for the previous bank to be sent\r |
| 432 | while (!(pUdp->UDP_CSR[AT91C_EP_IN] & AT91C_UDP_TXCOMP)) {\r |
| 433 | if (!usb_check()) return length;\r |
| 434 | }\r |
| 435 | UDP_CLEAR_EP_FLAGS(AT91C_EP_IN, AT91C_UDP_TXCOMP);\r |
| 436 | while (pUdp->UDP_CSR[AT91C_EP_IN] & AT91C_UDP_TXCOMP);\r |
| 437 | UDP_SET_EP_FLAGS(AT91C_EP_IN, AT91C_UDP_TXPKTRDY);\r |
| 438 | }\r |
| 439 | \r |
| 440 | // Wait for the end of transfer\r |
| 441 | while (!(pUdp->UDP_CSR[AT91C_EP_IN] & AT91C_UDP_TXCOMP)) {\r |
| 442 | if (!usb_check()) return length;\r |
| 443 | }\r |
| 444 | \r |
| 445 | UDP_CLEAR_EP_FLAGS(AT91C_EP_IN, AT91C_UDP_TXCOMP);\r |
| 446 | while (pUdp->UDP_CSR[AT91C_EP_IN] & AT91C_UDP_TXCOMP);\r |
| 447 | \r |
| 448 | return length;\r |
| 449 | }\r |
| 450 | \r |
| 451 | \r |
| 452 | //*----------------------------------------------------------------------------\r |
| 453 | //* \fn AT91F_USB_SendData\r |
| 454 | //* \brief Send Data through the control endpoint\r |
| 455 | //*----------------------------------------------------------------------------\r |
| 456 | unsigned int csrTab[100] = {0x00};\r |
| 457 | unsigned char csrIdx = 0;\r |
| 458 | \r |
| 459 | static void AT91F_USB_SendData(AT91PS_UDP pUdp, const char *pData, uint32_t length) {\r |
| 460 | uint32_t cpt = 0;\r |
| 461 | AT91_REG csr;\r |
| 462 | \r |
| 463 | do {\r |
| 464 | cpt = MIN(length, 8);\r |
| 465 | length -= cpt;\r |
| 466 | \r |
| 467 | while (cpt--)\r |
| 468 | pUdp->UDP_FDR[0] = *pData++;\r |
| 469 | \r |
| 470 | if (pUdp->UDP_CSR[AT91C_EP_CONTROL] & AT91C_UDP_TXCOMP) {\r |
| 471 | UDP_CLEAR_EP_FLAGS(AT91C_EP_CONTROL, AT91C_UDP_TXCOMP);\r |
| 472 | while (pUdp->UDP_CSR[AT91C_EP_CONTROL] & AT91C_UDP_TXCOMP);\r |
| 473 | }\r |
| 474 | \r |
| 475 | UDP_SET_EP_FLAGS(AT91C_EP_CONTROL, AT91C_UDP_TXPKTRDY);\r |
| 476 | do {\r |
| 477 | csr = pUdp->UDP_CSR[AT91C_EP_CONTROL];\r |
| 478 | \r |
| 479 | // Data IN stage has been stopped by a status OUT\r |
| 480 | if (csr & AT91C_UDP_RX_DATA_BK0) {\r |
| 481 | UDP_CLEAR_EP_FLAGS(AT91C_EP_CONTROL, AT91C_UDP_RX_DATA_BK0);\r |
| 482 | return;\r |
| 483 | }\r |
| 484 | } while ( !(csr & AT91C_UDP_TXCOMP) );\r |
| 485 | \r |
| 486 | } while (length);\r |
| 487 | \r |
| 488 | if (pUdp->UDP_CSR[AT91C_EP_CONTROL] & AT91C_UDP_TXCOMP) {\r |
| 489 | UDP_CLEAR_EP_FLAGS(AT91C_EP_CONTROL, AT91C_UDP_TXCOMP);\r |
| 490 | while (pUdp->UDP_CSR[AT91C_EP_CONTROL] & AT91C_UDP_TXCOMP);\r |
| 491 | }\r |
| 492 | }\r |
| 493 | \r |
| 494 | \r |
| 495 | //*----------------------------------------------------------------------------\r |
| 496 | //* \fn AT91F_USB_SendZlp\r |
| 497 | //* \brief Send zero length packet through the control endpoint\r |
| 498 | //*----------------------------------------------------------------------------\r |
| 499 | void AT91F_USB_SendZlp(AT91PS_UDP pUdp) {\r |
| 500 | UDP_SET_EP_FLAGS(AT91C_EP_CONTROL, AT91C_UDP_TXPKTRDY);\r |
| 501 | while ( !(pUdp->UDP_CSR[AT91C_EP_CONTROL] & AT91C_UDP_TXCOMP) );\r |
| 502 | UDP_CLEAR_EP_FLAGS(AT91C_EP_CONTROL, AT91C_UDP_TXCOMP);\r |
| 503 | while (pUdp->UDP_CSR[AT91C_EP_CONTROL] & AT91C_UDP_TXCOMP);\r |
| 504 | }\r |
| 505 | \r |
| 506 | \r |
| 507 | //*----------------------------------------------------------------------------\r |
| 508 | //* \fn AT91F_USB_SendStall\r |
| 509 | //* \brief Stall the control endpoint\r |
| 510 | //*----------------------------------------------------------------------------\r |
| 511 | void AT91F_USB_SendStall(AT91PS_UDP pUdp) {\r |
| 512 | UDP_SET_EP_FLAGS(AT91C_EP_CONTROL, AT91C_UDP_FORCESTALL);\r |
| 513 | while ( !(pUdp->UDP_CSR[AT91C_EP_CONTROL] & AT91C_UDP_ISOERROR) );\r |
| 514 | UDP_CLEAR_EP_FLAGS(AT91C_EP_CONTROL, AT91C_UDP_FORCESTALL | AT91C_UDP_ISOERROR);\r |
| 515 | while (pUdp->UDP_CSR[AT91C_EP_CONTROL] & (AT91C_UDP_FORCESTALL | AT91C_UDP_ISOERROR));\r |
| 516 | }\r |
| 517 | \r |
| 518 | \r |
| 519 | //*----------------------------------------------------------------------------\r |
| 520 | //* \fn AT91F_CDC_Enumerate\r |
| 521 | //* \brief This function is a callback invoked when a SETUP packet is received\r |
| 522 | //*----------------------------------------------------------------------------\r |
| 523 | void AT91F_CDC_Enumerate() {\r |
| 524 | byte_t bmRequestType, bRequest;\r |
| 525 | uint16_t wValue, wIndex, wLength, wStatus;\r |
| 526 | \r |
| 527 | if ( !(pUdp->UDP_CSR[AT91C_EP_CONTROL] & AT91C_UDP_RXSETUP) )\r |
| 528 | return;\r |
| 529 | \r |
| 530 | bmRequestType = pUdp->UDP_FDR[AT91C_EP_CONTROL];\r |
| 531 | bRequest = pUdp->UDP_FDR[AT91C_EP_CONTROL];\r |
| 532 | wValue = (pUdp->UDP_FDR[AT91C_EP_CONTROL] & 0xFF);\r |
| 533 | wValue |= (pUdp->UDP_FDR[AT91C_EP_CONTROL] << 8);\r |
| 534 | wIndex = (pUdp->UDP_FDR[AT91C_EP_CONTROL] & 0xFF);\r |
| 535 | wIndex |= (pUdp->UDP_FDR[AT91C_EP_CONTROL] << 8);\r |
| 536 | wLength = (pUdp->UDP_FDR[AT91C_EP_CONTROL] & 0xFF);\r |
| 537 | wLength |= (pUdp->UDP_FDR[AT91C_EP_CONTROL] << 8);\r |
| 538 | \r |
| 539 | if (bmRequestType & 0x80) { // Data Phase Transfer Direction Device to Host\r |
| 540 | UDP_SET_EP_FLAGS(AT91C_EP_CONTROL, AT91C_UDP_DIR);\r |
| 541 | while ( !(pUdp->UDP_CSR[AT91C_EP_CONTROL] & AT91C_UDP_DIR) );\r |
| 542 | }\r |
| 543 | UDP_CLEAR_EP_FLAGS(AT91C_EP_CONTROL, AT91C_UDP_RXSETUP);\r |
| 544 | while ( (pUdp->UDP_CSR[AT91C_EP_CONTROL] & AT91C_UDP_RXSETUP) );\r |
| 545 | \r |
| 546 | // Handle supported standard device request Cf Table 9-3 in USB specification Rev 1.1\r |
| 547 | switch ((bRequest << 8) | bmRequestType) {\r |
| 548 | case STD_GET_DESCRIPTOR:\r |
| 549 | if (wValue == 0x100) // Return Device Descriptor\r |
| 550 | AT91F_USB_SendData(pUdp, devDescriptor, MIN(sizeof(devDescriptor), wLength));\r |
| 551 | else if (wValue == 0x200) // Return Configuration Descriptor\r |
| 552 | AT91F_USB_SendData(pUdp, cfgDescriptor, MIN(sizeof(cfgDescriptor), wLength));\r |
| 553 | else if ((wValue & 0xF00) == 0x300) { // Return String Descriptor\r |
| 554 | const char *strDescriptor = getStringDescriptor(wValue & 0xff);\r |
| 555 | if (strDescriptor != NULL) {\r |
| 556 | AT91F_USB_SendData(pUdp, strDescriptor, MIN(strDescriptor[0], wLength));\r |
| 557 | } else {\r |
| 558 | AT91F_USB_SendStall(pUdp);\r |
| 559 | }\r |
| 560 | }\r |
| 561 | else\r |
| 562 | AT91F_USB_SendStall(pUdp);\r |
| 563 | break;\r |
| 564 | case STD_SET_ADDRESS:\r |
| 565 | AT91F_USB_SendZlp(pUdp);\r |
| 566 | pUdp->UDP_FADDR = (AT91C_UDP_FEN | wValue);\r |
| 567 | pUdp->UDP_GLBSTATE = (wValue) ? AT91C_UDP_FADDEN : 0;\r |
| 568 | break;\r |
| 569 | case STD_SET_CONFIGURATION:\r |
| 570 | btConfiguration = wValue;\r |
| 571 | AT91F_USB_SendZlp(pUdp);\r |
| 572 | pUdp->UDP_GLBSTATE = (wValue) ? AT91C_UDP_CONFG : AT91C_UDP_FADDEN;\r |
| 573 | pUdp->UDP_CSR[AT91C_EP_OUT] = (wValue) ? (AT91C_UDP_EPEDS | AT91C_UDP_EPTYPE_BULK_OUT) : 0;\r |
| 574 | pUdp->UDP_CSR[AT91C_EP_IN] = (wValue) ? (AT91C_UDP_EPEDS | AT91C_UDP_EPTYPE_BULK_IN) : 0;\r |
| 575 | pUdp->UDP_CSR[AT91C_EP_NOTIFY] = (wValue) ? (AT91C_UDP_EPEDS | AT91C_UDP_EPTYPE_INT_IN) : 0;\r |
| 576 | break;\r |
| 577 | case STD_GET_CONFIGURATION:\r |
| 578 | AT91F_USB_SendData(pUdp, (char *) &(btConfiguration), sizeof(btConfiguration));\r |
| 579 | break;\r |
| 580 | case STD_GET_STATUS_ZERO:\r |
| 581 | wStatus = 0; // Device is Bus powered, remote wakeup disabled\r |
| 582 | AT91F_USB_SendData(pUdp, (char *) &wStatus, sizeof(wStatus));\r |
| 583 | break;\r |
| 584 | case STD_GET_STATUS_INTERFACE:\r |
| 585 | wStatus = 0; // reserved for future use\r |
| 586 | AT91F_USB_SendData(pUdp, (char *) &wStatus, sizeof(wStatus));\r |
| 587 | break;\r |
| 588 | case STD_GET_STATUS_ENDPOINT:\r |
| 589 | wStatus = 0;\r |
| 590 | wIndex &= 0x0F;\r |
| 591 | if ((pUdp->UDP_GLBSTATE & AT91C_UDP_CONFG) && (wIndex <= AT91C_EP_NOTIFY)) {\r |
| 592 | wStatus = (pUdp->UDP_CSR[wIndex] & AT91C_UDP_EPEDS) ? 0 : 1;\r |
| 593 | AT91F_USB_SendData(pUdp, (char *) &wStatus, sizeof(wStatus));\r |
| 594 | }\r |
| 595 | else if ((pUdp->UDP_GLBSTATE & AT91C_UDP_FADDEN) && (wIndex == AT91C_EP_CONTROL)) {\r |
| 596 | wStatus = (pUdp->UDP_CSR[wIndex] & AT91C_UDP_EPEDS) ? 0 : 1;\r |
| 597 | AT91F_USB_SendData(pUdp, (char *) &wStatus, sizeof(wStatus));\r |
| 598 | }\r |
| 599 | else\r |
| 600 | AT91F_USB_SendStall(pUdp);\r |
| 601 | break;\r |
| 602 | case STD_SET_FEATURE_ZERO:\r |
| 603 | AT91F_USB_SendStall(pUdp);\r |
| 604 | break;\r |
| 605 | case STD_SET_FEATURE_INTERFACE:\r |
| 606 | AT91F_USB_SendZlp(pUdp);\r |
| 607 | break;\r |
| 608 | case STD_SET_FEATURE_ENDPOINT:\r |
| 609 | wIndex &= 0x0F;\r |
| 610 | if ((wValue == 0) && (wIndex >= AT91C_EP_OUT) && (wIndex <= AT91C_EP_NOTIFY)) {\r |
| 611 | pUdp->UDP_CSR[wIndex] = 0;\r |
| 612 | AT91F_USB_SendZlp(pUdp);\r |
| 613 | }\r |
| 614 | else\r |
| 615 | AT91F_USB_SendStall(pUdp);\r |
| 616 | break;\r |
| 617 | case STD_CLEAR_FEATURE_ZERO:\r |
| 618 | AT91F_USB_SendStall(pUdp);\r |
| 619 | break;\r |
| 620 | case STD_CLEAR_FEATURE_INTERFACE:\r |
| 621 | AT91F_USB_SendZlp(pUdp);\r |
| 622 | break;\r |
| 623 | case STD_CLEAR_FEATURE_ENDPOINT:\r |
| 624 | wIndex &= 0x0F;\r |
| 625 | if ((wValue == 0) && (wIndex >= AT91C_EP_OUT) && (wIndex <= AT91C_EP_NOTIFY)) {\r |
| 626 | if (wIndex == AT91C_EP_OUT)\r |
| 627 | pUdp->UDP_CSR[AT91C_EP_OUT] = (AT91C_UDP_EPEDS | AT91C_UDP_EPTYPE_BULK_OUT);\r |
| 628 | else if (wIndex == AT91C_EP_IN)\r |
| 629 | pUdp->UDP_CSR[AT91C_EP_IN] = (AT91C_UDP_EPEDS | AT91C_UDP_EPTYPE_BULK_IN);\r |
| 630 | else if (wIndex == AT91C_EP_NOTIFY)\r |
| 631 | pUdp->UDP_CSR[AT91C_EP_NOTIFY] = (AT91C_UDP_EPEDS | AT91C_UDP_EPTYPE_INT_IN);\r |
| 632 | AT91F_USB_SendZlp(pUdp);\r |
| 633 | }\r |
| 634 | else\r |
| 635 | AT91F_USB_SendStall(pUdp);\r |
| 636 | break;\r |
| 637 | \r |
| 638 | // handle CDC class requests\r |
| 639 | case SET_LINE_CODING:\r |
| 640 | while ( !(pUdp->UDP_CSR[AT91C_EP_CONTROL] & AT91C_UDP_RX_DATA_BK0) );\r |
| 641 | UDP_CLEAR_EP_FLAGS(AT91C_EP_CONTROL, AT91C_UDP_RX_DATA_BK0);\r |
| 642 | AT91F_USB_SendZlp(pUdp);\r |
| 643 | break;\r |
| 644 | case GET_LINE_CODING:\r |
| 645 | AT91F_USB_SendData(pUdp, (char *) &line, MIN(sizeof(line), wLength));\r |
| 646 | break;\r |
| 647 | case SET_CONTROL_LINE_STATE:\r |
| 648 | btConnection = wValue;\r |
| 649 | AT91F_USB_SendZlp(pUdp);\r |
| 650 | break;\r |
| 651 | default:\r |
| 652 | AT91F_USB_SendStall(pUdp);\r |
| 653 | break;\r |
| 654 | }\r |
| 655 | }\r |