1 /* 2 * (C) Copyright 2003 3 * Gerry Hamel, geh@ti.com, Texas Instruments 4 * 5 * (C) Copyright 2006 6 * Bryan O'Donoghue, bodonoghue@codehermit.ie 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License as published by 10 * the Free Software Foundation; either version 2 of the License, or 11 * (at your option) any later version. 12 * 13 * This program is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 * GNU General Public License for more details. 17 * 18 * You should have received a copy of the GNU General Public License 19 * along with this program; if not, write to the Free Software 20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 21 * 22 */ 23 24 #include <common.h> 25 #include <config.h> 26 #include <circbuf.h> 27 #include <devices.h> 28 #include "usbtty.h" 29 #include "usb_cdc_acm.h" 30 #include "usbdescriptors.h" 31 32 #ifdef DEBUG 33 #define TTYDBG(fmt,args...)\ 34 serial_printf("[%s] %s %d: "fmt, __FILE__,__FUNCTION__,__LINE__,##args) 35 #else 36 #define TTYDBG(fmt,args...) do{}while(0) 37 #endif 38 39 #if 1 40 #define TTYERR(fmt,args...)\ 41 serial_printf("ERROR![%s] %s %d: "fmt, __FILE__,__FUNCTION__,\ 42 __LINE__,##args) 43 #else 44 #define TTYERR(fmt,args...) do{}while(0) 45 #endif 46 47 /* 48 * Defines 49 */ 50 #define NUM_CONFIGS 1 51 #define MAX_INTERFACES 2 52 #define NUM_ENDPOINTS 3 53 #define ACM_TX_ENDPOINT 3 54 #define ACM_RX_ENDPOINT 2 55 #define GSERIAL_TX_ENDPOINT 2 56 #define GSERIAL_RX_ENDPOINT 1 57 #define NUM_ACM_INTERFACES 2 58 #define NUM_GSERIAL_INTERFACES 1 59 #define CONFIG_USBD_DATA_INTERFACE_STR "Bulk Data Interface" 60 #define CONFIG_USBD_CTRL_INTERFACE_STR "Control Interface" 61 62 /* 63 * Buffers to hold input and output data 64 */ 65 #define USBTTY_BUFFER_SIZE 256 66 static circbuf_t usbtty_input; 67 static circbuf_t usbtty_output; 68 69 70 /* 71 * Instance variables 72 */ 73 static device_t usbttydev; 74 static struct usb_device_instance device_instance[1]; 75 static struct usb_bus_instance bus_instance[1]; 76 static struct usb_configuration_instance config_instance[NUM_CONFIGS]; 77 static struct usb_interface_instance interface_instance[MAX_INTERFACES]; 78 static struct usb_alternate_instance alternate_instance[MAX_INTERFACES]; 79 /* one extra for control endpoint */ 80 static struct usb_endpoint_instance endpoint_instance[NUM_ENDPOINTS+1]; 81 82 /* 83 * Global flag 84 */ 85 int usbtty_configured_flag = 0; 86 87 /* 88 * Serial number 89 */ 90 static char serial_number[16]; 91 92 93 /* 94 * Descriptors, Strings, Local variables. 95 */ 96 97 /* defined and used by usbdcore_ep0.c */ 98 extern struct usb_string_descriptor **usb_strings; 99 100 /* Indicies, References */ 101 static unsigned short rx_endpoint = 0; 102 static unsigned short tx_endpoint = 0; 103 static unsigned short interface_count = 0; 104 static struct usb_string_descriptor *usbtty_string_table[STR_COUNT]; 105 106 /* USB Descriptor Strings */ 107 static u8 wstrLang[4] = {4,USB_DT_STRING,0x9,0x4}; 108 static u8 wstrManufacturer[2 + 2*(sizeof(CONFIG_USBD_MANUFACTURER)-1)]; 109 static u8 wstrProduct[2 + 2*(sizeof(CONFIG_USBD_PRODUCT_NAME)-1)]; 110 static u8 wstrSerial[2 + 2*(sizeof(serial_number) - 1)]; 111 static u8 wstrConfiguration[2 + 2*(sizeof(CONFIG_USBD_CONFIGURATION_STR)-1)]; 112 static u8 wstrDataInterface[2 + 2*(sizeof(CONFIG_USBD_DATA_INTERFACE_STR)-1)]; 113 static u8 wstrCtrlInterface[2 + 2*(sizeof(CONFIG_USBD_DATA_INTERFACE_STR)-1)]; 114 115 /* Standard USB Data Structures */ 116 static struct usb_interface_descriptor interface_descriptors[MAX_INTERFACES]; 117 static struct usb_endpoint_descriptor *ep_descriptor_ptrs[NUM_ENDPOINTS]; 118 static struct usb_configuration_descriptor *configuration_descriptor = 0; 119 static struct usb_device_descriptor device_descriptor = { 120 .bLength = sizeof(struct usb_device_descriptor), 121 .bDescriptorType = USB_DT_DEVICE, 122 .bcdUSB = cpu_to_le16(USB_BCD_VERSION), 123 .bDeviceSubClass = 0x00, 124 .bDeviceProtocol = 0x00, 125 .bMaxPacketSize0 = EP0_MAX_PACKET_SIZE, 126 .idVendor = cpu_to_le16(CONFIG_USBD_VENDORID), 127 .bcdDevice = cpu_to_le16(USBTTY_BCD_DEVICE), 128 .iManufacturer = STR_MANUFACTURER, 129 .iProduct = STR_PRODUCT, 130 .iSerialNumber = STR_SERIAL, 131 .bNumConfigurations = NUM_CONFIGS 132 }; 133 134 135 /* 136 * Static CDC ACM specific descriptors 137 */ 138 139 struct acm_config_desc { 140 struct usb_configuration_descriptor configuration_desc; 141 142 /* Master Interface */ 143 struct usb_interface_descriptor interface_desc; 144 145 struct usb_class_header_function_descriptor usb_class_header; 146 struct usb_class_call_management_descriptor usb_class_call_mgt; 147 struct usb_class_abstract_control_descriptor usb_class_acm; 148 struct usb_class_union_function_descriptor usb_class_union; 149 struct usb_endpoint_descriptor notification_endpoint; 150 151 /* Slave Interface */ 152 struct usb_interface_descriptor data_class_interface; 153 struct usb_endpoint_descriptor data_endpoints[NUM_ENDPOINTS-1]; 154 } __attribute__((packed)); 155 156 static struct acm_config_desc acm_configuration_descriptors[NUM_CONFIGS] = { 157 { 158 .configuration_desc ={ 159 .bLength = 160 sizeof(struct usb_configuration_descriptor), 161 .bDescriptorType = USB_DT_CONFIG, 162 .wTotalLength = 163 cpu_to_le16(sizeof(struct acm_config_desc)), 164 .bNumInterfaces = NUM_ACM_INTERFACES, 165 .bConfigurationValue = 1, 166 .iConfiguration = STR_CONFIG, 167 .bmAttributes = 168 BMATTRIBUTE_SELF_POWERED|BMATTRIBUTE_RESERVED, 169 .bMaxPower = USBTTY_MAXPOWER 170 }, 171 /* Interface 1 */ 172 .interface_desc = { 173 .bLength = sizeof(struct usb_interface_descriptor), 174 .bDescriptorType = USB_DT_INTERFACE, 175 .bInterfaceNumber = 0, 176 .bAlternateSetting = 0, 177 .bNumEndpoints = 0x01, 178 .bInterfaceClass = 179 COMMUNICATIONS_INTERFACE_CLASS_CONTROL, 180 .bInterfaceSubClass = COMMUNICATIONS_ACM_SUBCLASS, 181 .bInterfaceProtocol = COMMUNICATIONS_V25TER_PROTOCOL, 182 .iInterface = STR_CTRL_INTERFACE, 183 }, 184 .usb_class_header = { 185 .bFunctionLength = 186 sizeof(struct usb_class_header_function_descriptor), 187 .bDescriptorType = CS_INTERFACE, 188 .bDescriptorSubtype = USB_ST_HEADER, 189 .bcdCDC = cpu_to_le16(110), 190 }, 191 .usb_class_call_mgt = { 192 .bFunctionLength = 193 sizeof(struct usb_class_call_management_descriptor), 194 .bDescriptorType = CS_INTERFACE, 195 .bDescriptorSubtype = USB_ST_CMF, 196 .bmCapabilities = 0x00, 197 .bDataInterface = 0x01, 198 }, 199 .usb_class_acm = { 200 .bFunctionLength = 201 sizeof(struct usb_class_abstract_control_descriptor), 202 .bDescriptorType = CS_INTERFACE, 203 .bDescriptorSubtype = USB_ST_ACMF, 204 .bmCapabilities = 0x00, 205 }, 206 .usb_class_union = { 207 .bFunctionLength = 208 sizeof(struct usb_class_union_function_descriptor), 209 .bDescriptorType = CS_INTERFACE, 210 .bDescriptorSubtype = USB_ST_UF, 211 .bMasterInterface = 0x00, 212 .bSlaveInterface0 = 0x01, 213 }, 214 .notification_endpoint = { 215 .bLength = 216 sizeof(struct usb_endpoint_descriptor), 217 .bDescriptorType = USB_DT_ENDPOINT, 218 .bEndpointAddress = 0x01 | USB_DIR_IN, 219 .bmAttributes = USB_ENDPOINT_XFER_INT, 220 .wMaxPacketSize 221 = cpu_to_le16(CONFIG_USBD_SERIAL_INT_PKTSIZE), 222 .bInterval = 0xFF, 223 }, 224 225 /* Interface 2 */ 226 .data_class_interface = { 227 .bLength = 228 sizeof(struct usb_interface_descriptor), 229 .bDescriptorType = USB_DT_INTERFACE, 230 .bInterfaceNumber = 0x01, 231 .bAlternateSetting = 0x00, 232 .bNumEndpoints = 0x02, 233 .bInterfaceClass = 234 COMMUNICATIONS_INTERFACE_CLASS_DATA, 235 .bInterfaceSubClass = DATA_INTERFACE_SUBCLASS_NONE, 236 .bInterfaceProtocol = DATA_INTERFACE_PROTOCOL_NONE, 237 .iInterface = STR_DATA_INTERFACE, 238 }, 239 .data_endpoints = { 240 { 241 .bLength = 242 sizeof(struct usb_endpoint_descriptor), 243 .bDescriptorType = USB_DT_ENDPOINT, 244 .bEndpointAddress = 0x02 | USB_DIR_OUT, 245 .bmAttributes = 246 USB_ENDPOINT_XFER_BULK, 247 .wMaxPacketSize = 248 cpu_to_le16(CONFIG_USBD_SERIAL_BULK_PKTSIZE), 249 .bInterval = 0xFF, 250 }, 251 { 252 .bLength = 253 sizeof(struct usb_endpoint_descriptor), 254 .bDescriptorType = USB_DT_ENDPOINT, 255 .bEndpointAddress = 0x03 | USB_DIR_IN, 256 .bmAttributes = 257 USB_ENDPOINT_XFER_BULK, 258 .wMaxPacketSize = 259 cpu_to_le16(CONFIG_USBD_SERIAL_BULK_PKTSIZE), 260 .bInterval = 0xFF, 261 }, 262 }, 263 }, 264 }; 265 266 static struct rs232_emu rs232_desc={ 267 .dter = 115200, 268 .stop_bits = 0x00, 269 .parity = 0x00, 270 .data_bits = 0x08 271 }; 272 273 274 /* 275 * Static Generic Serial specific data 276 */ 277 278 279 struct gserial_config_desc { 280 281 struct usb_configuration_descriptor configuration_desc; 282 struct usb_interface_descriptor interface_desc[NUM_GSERIAL_INTERFACES]; 283 struct usb_endpoint_descriptor data_endpoints[NUM_ENDPOINTS]; 284 285 } __attribute__((packed)); 286 287 static struct gserial_config_desc 288 gserial_configuration_descriptors[NUM_CONFIGS] ={ 289 { 290 .configuration_desc ={ 291 .bLength = sizeof(struct usb_configuration_descriptor), 292 .bDescriptorType = USB_DT_CONFIG, 293 .wTotalLength = 294 cpu_to_le16(sizeof(struct gserial_config_desc)), 295 .bNumInterfaces = NUM_GSERIAL_INTERFACES, 296 .bConfigurationValue = 1, 297 .iConfiguration = STR_CONFIG, 298 .bmAttributes = 299 BMATTRIBUTE_SELF_POWERED|BMATTRIBUTE_RESERVED, 300 .bMaxPower = USBTTY_MAXPOWER 301 }, 302 .interface_desc = { 303 { 304 .bLength = 305 sizeof(struct usb_interface_descriptor), 306 .bDescriptorType = USB_DT_INTERFACE, 307 .bInterfaceNumber = 0, 308 .bAlternateSetting = 0, 309 .bNumEndpoints = NUM_ENDPOINTS, 310 .bInterfaceClass = 311 COMMUNICATIONS_INTERFACE_CLASS_VENDOR, 312 .bInterfaceSubClass = 313 COMMUNICATIONS_NO_SUBCLASS, 314 .bInterfaceProtocol = 315 COMMUNICATIONS_NO_PROTOCOL, 316 .iInterface = STR_DATA_INTERFACE 317 }, 318 }, 319 .data_endpoints = { 320 { 321 .bLength = 322 sizeof(struct usb_endpoint_descriptor), 323 .bDescriptorType = USB_DT_ENDPOINT, 324 .bEndpointAddress = 0x01 | USB_DIR_OUT, 325 .bmAttributes = USB_ENDPOINT_XFER_BULK, 326 .wMaxPacketSize = 327 cpu_to_le16(CONFIG_USBD_SERIAL_OUT_PKTSIZE), 328 .bInterval= 0xFF, 329 }, 330 { 331 .bLength = 332 sizeof(struct usb_endpoint_descriptor), 333 .bDescriptorType = USB_DT_ENDPOINT, 334 .bEndpointAddress = 0x02 | USB_DIR_IN, 335 .bmAttributes = USB_ENDPOINT_XFER_BULK, 336 .wMaxPacketSize = 337 cpu_to_le16(CONFIG_USBD_SERIAL_IN_PKTSIZE), 338 .bInterval = 0xFF, 339 }, 340 { 341 .bLength = 342 sizeof(struct usb_endpoint_descriptor), 343 .bDescriptorType = USB_DT_ENDPOINT, 344 .bEndpointAddress = 0x03 | USB_DIR_IN, 345 .bmAttributes = USB_ENDPOINT_XFER_INT, 346 .wMaxPacketSize = 347 cpu_to_le16(CONFIG_USBD_SERIAL_INT_PKTSIZE), 348 .bInterval = 0xFF, 349 }, 350 }, 351 }, 352 }; 353 354 /* 355 * Static Function Prototypes 356 */ 357 358 static void usbtty_init_strings (void); 359 static void usbtty_init_instances (void); 360 static void usbtty_init_endpoints (void); 361 static void usbtty_init_terminal_type(short type); 362 static void usbtty_event_handler (struct usb_device_instance *device, 363 usb_device_event_t event, int data); 364 static int usbtty_cdc_setup(struct usb_device_request *request, 365 struct urb *urb); 366 static int usbtty_configured (void); 367 static int write_buffer (circbuf_t * buf); 368 static int fill_buffer (circbuf_t * buf); 369 370 void usbtty_poll (void); 371 372 /* utility function for converting char* to wide string used by USB */ 373 static void str2wide (char *str, u16 * wide) 374 { 375 int i; 376 for (i = 0; i < strlen (str) && str[i]; i++){ 377 #if defined(__LITTLE_ENDIAN) 378 wide[i] = (u16) str[i]; 379 #elif defined(__BIG_ENDIAN) 380 wide[i] = ((u16)(str[i])<<8); 381 #else 382 #error "__LITTLE_ENDIAN or __BIG_ENDIAN undefined" 383 #endif 384 } 385 } 386 387 /* 388 * Test whether a character is in the RX buffer 389 */ 390 391 int usbtty_tstc (void) 392 { 393 struct usb_endpoint_instance *endpoint = 394 &endpoint_instance[rx_endpoint]; 395 396 /* If no input data exists, allow more RX to be accepted */ 397 if(usbtty_input.size <= 0){ 398 udc_unset_nak(endpoint->endpoint_address&0x03); 399 } 400 401 usbtty_poll (); 402 return (usbtty_input.size > 0); 403 } 404 405 /* 406 * Read a single byte from the usb client port. Returns 1 on success, 0 407 * otherwise. When the function is succesfull, the character read is 408 * written into its argument c. 409 */ 410 411 int usbtty_getc (void) 412 { 413 char c; 414 struct usb_endpoint_instance *endpoint = 415 &endpoint_instance[rx_endpoint]; 416 417 while (usbtty_input.size <= 0) { 418 udc_unset_nak(endpoint->endpoint_address&0x03); 419 usbtty_poll (); 420 } 421 422 buf_pop (&usbtty_input, &c, 1); 423 udc_set_nak(endpoint->endpoint_address&0x03); 424 425 return c; 426 } 427 428 /* 429 * Output a single byte to the usb client port. 430 */ 431 void usbtty_putc (const char c) 432 { 433 if (!usbtty_configured ()) 434 return; 435 436 buf_push (&usbtty_output, &c, 1); 437 /* If \n, also do \r */ 438 if (c == '\n') 439 buf_push (&usbtty_output, "\r", 1); 440 441 /* Poll at end to handle new data... */ 442 if ((usbtty_output.size + 2) >= usbtty_output.totalsize) { 443 usbtty_poll (); 444 } 445 } 446 447 /* usbtty_puts() helper function for finding the next '\n' in a string */ 448 static int next_nl_pos (const char *s) 449 { 450 int i; 451 452 for (i = 0; s[i] != '\0'; i++) { 453 if (s[i] == '\n') 454 return i; 455 } 456 return i; 457 } 458 459 /* 460 * Output a string to the usb client port - implementing flow control 461 */ 462 463 static void __usbtty_puts (const char *str, int len) 464 { 465 int maxlen = usbtty_output.totalsize; 466 int space, n; 467 468 /* break str into chunks < buffer size, if needed */ 469 while (len > 0) { 470 usbtty_poll (); 471 472 space = maxlen - usbtty_output.size; 473 /* Empty buffer here, if needed, to ensure space... */ 474 if (space) { 475 write_buffer (&usbtty_output); 476 477 n = MIN (space, MIN (len, maxlen)); 478 buf_push (&usbtty_output, str, n); 479 480 str += n; 481 len -= n; 482 } 483 } 484 } 485 486 void usbtty_puts (const char *str) 487 { 488 int n; 489 int len; 490 491 if (!usbtty_configured ()) 492 return; 493 494 len = strlen (str); 495 /* add '\r' for each '\n' */ 496 while (len > 0) { 497 n = next_nl_pos (str); 498 499 if (str[n] == '\n') { 500 __usbtty_puts (str, n + 1); 501 __usbtty_puts ("\r", 1); 502 str += (n + 1); 503 len -= (n + 1); 504 } else { 505 /* No \n found. All done. */ 506 __usbtty_puts (str, n); 507 break; 508 } 509 } 510 511 /* Poll at end to handle new data... */ 512 usbtty_poll (); 513 } 514 515 /* 516 * Initialize the usb client port. 517 * 518 */ 519 int drv_usbtty_init (void) 520 { 521 int rc; 522 char * sn; 523 char * tt; 524 int snlen; 525 526 /* Ger seiral number */ 527 if (!(sn = getenv("serial#"))) { 528 sn = "000000000000"; 529 } 530 snlen = strlen(sn); 531 if (snlen > sizeof(serial_number) - 1) { 532 printf ("Warning: serial number %s is too long (%d > %lu)\n", 533 sn, snlen, (ulong)(sizeof(serial_number) - 1)); 534 snlen = sizeof(serial_number) - 1; 535 } 536 memcpy (serial_number, sn, snlen); 537 serial_number[snlen] = '\0'; 538 539 /* Decide on which type of UDC device to be. 540 */ 541 542 if(!(tt = getenv("usbtty"))) { 543 tt = "generic"; 544 } 545 usbtty_init_terminal_type(strcmp(tt,"cdc_acm")); 546 547 /* prepare buffers... */ 548 buf_init (&usbtty_input, USBTTY_BUFFER_SIZE); 549 buf_init (&usbtty_output, USBTTY_BUFFER_SIZE); 550 551 /* Now, set up USB controller and infrastructure */ 552 udc_init (); /* Basic USB initialization */ 553 554 usbtty_init_strings (); 555 usbtty_init_instances (); 556 557 udc_startup_events (device_instance);/* Enable dev, init udc pointers */ 558 udc_connect (); /* Enable pullup for host detection */ 559 560 usbtty_init_endpoints (); 561 562 /* Device initialization */ 563 memset (&usbttydev, 0, sizeof (usbttydev)); 564 565 strcpy (usbttydev.name, "usbtty"); 566 usbttydev.ext = 0; /* No extensions */ 567 usbttydev.flags = DEV_FLAGS_INPUT | DEV_FLAGS_OUTPUT; 568 usbttydev.tstc = usbtty_tstc; /* 'tstc' function */ 569 usbttydev.getc = usbtty_getc; /* 'getc' function */ 570 usbttydev.putc = usbtty_putc; /* 'putc' function */ 571 usbttydev.puts = usbtty_puts; /* 'puts' function */ 572 573 rc = device_register (&usbttydev); 574 575 return (rc == 0) ? 1 : rc; 576 } 577 578 static void usbtty_init_strings (void) 579 { 580 struct usb_string_descriptor *string; 581 582 usbtty_string_table[STR_LANG] = 583 (struct usb_string_descriptor*)wstrLang; 584 585 string = (struct usb_string_descriptor *) wstrManufacturer; 586 string->bLength = sizeof(wstrManufacturer); 587 string->bDescriptorType = USB_DT_STRING; 588 str2wide (CONFIG_USBD_MANUFACTURER, string->wData); 589 usbtty_string_table[STR_MANUFACTURER]=string; 590 591 592 string = (struct usb_string_descriptor *) wstrProduct; 593 string->bLength = sizeof(wstrProduct); 594 string->bDescriptorType = USB_DT_STRING; 595 str2wide (CONFIG_USBD_PRODUCT_NAME, string->wData); 596 usbtty_string_table[STR_PRODUCT]=string; 597 598 599 string = (struct usb_string_descriptor *) wstrSerial; 600 string->bLength = sizeof(serial_number); 601 string->bDescriptorType = USB_DT_STRING; 602 str2wide (serial_number, string->wData); 603 usbtty_string_table[STR_SERIAL]=string; 604 605 606 string = (struct usb_string_descriptor *) wstrConfiguration; 607 string->bLength = sizeof(wstrConfiguration); 608 string->bDescriptorType = USB_DT_STRING; 609 str2wide (CONFIG_USBD_CONFIGURATION_STR, string->wData); 610 usbtty_string_table[STR_CONFIG]=string; 611 612 613 string = (struct usb_string_descriptor *) wstrDataInterface; 614 string->bLength = sizeof(wstrDataInterface); 615 string->bDescriptorType = USB_DT_STRING; 616 str2wide (CONFIG_USBD_DATA_INTERFACE_STR, string->wData); 617 usbtty_string_table[STR_DATA_INTERFACE]=string; 618 619 string = (struct usb_string_descriptor *) wstrCtrlInterface; 620 string->bLength = sizeof(wstrCtrlInterface); 621 string->bDescriptorType = USB_DT_STRING; 622 str2wide (CONFIG_USBD_CTRL_INTERFACE_STR, string->wData); 623 usbtty_string_table[STR_CTRL_INTERFACE]=string; 624 625 /* Now, initialize the string table for ep0 handling */ 626 usb_strings = usbtty_string_table; 627 } 628 629 static void usbtty_init_instances (void) 630 { 631 int i; 632 633 /* initialize device instance */ 634 memset (device_instance, 0, sizeof (struct usb_device_instance)); 635 device_instance->device_state = STATE_INIT; 636 device_instance->device_descriptor = &device_descriptor; 637 device_instance->event = usbtty_event_handler; 638 device_instance->cdc_recv_setup = usbtty_cdc_setup; 639 device_instance->bus = bus_instance; 640 device_instance->configurations = NUM_CONFIGS; 641 device_instance->configuration_instance_array = config_instance; 642 643 /* initialize bus instance */ 644 memset (bus_instance, 0, sizeof (struct usb_bus_instance)); 645 bus_instance->device = device_instance; 646 bus_instance->endpoint_array = endpoint_instance; 647 bus_instance->max_endpoints = 1; 648 bus_instance->maxpacketsize = 64; 649 bus_instance->serial_number_str = serial_number; 650 651 /* configuration instance */ 652 memset (config_instance, 0, 653 sizeof (struct usb_configuration_instance)); 654 config_instance->interfaces = interface_count; 655 config_instance->configuration_descriptor = configuration_descriptor; 656 config_instance->interface_instance_array = interface_instance; 657 658 /* interface instance */ 659 memset (interface_instance, 0, 660 sizeof (struct usb_interface_instance)); 661 interface_instance->alternates = 1; 662 interface_instance->alternates_instance_array = alternate_instance; 663 664 /* alternates instance */ 665 memset (alternate_instance, 0, 666 sizeof (struct usb_alternate_instance)); 667 alternate_instance->interface_descriptor = interface_descriptors; 668 alternate_instance->endpoints = NUM_ENDPOINTS; 669 alternate_instance->endpoints_descriptor_array = ep_descriptor_ptrs; 670 671 /* endpoint instances */ 672 memset (&endpoint_instance[0], 0, 673 sizeof (struct usb_endpoint_instance)); 674 endpoint_instance[0].endpoint_address = 0; 675 endpoint_instance[0].rcv_packetSize = EP0_MAX_PACKET_SIZE; 676 endpoint_instance[0].rcv_attributes = USB_ENDPOINT_XFER_CONTROL; 677 endpoint_instance[0].tx_packetSize = EP0_MAX_PACKET_SIZE; 678 endpoint_instance[0].tx_attributes = USB_ENDPOINT_XFER_CONTROL; 679 udc_setup_ep (device_instance, 0, &endpoint_instance[0]); 680 681 for (i = 1; i <= NUM_ENDPOINTS; i++) { 682 memset (&endpoint_instance[i], 0, 683 sizeof (struct usb_endpoint_instance)); 684 685 endpoint_instance[i].endpoint_address = 686 ep_descriptor_ptrs[i - 1]->bEndpointAddress; 687 688 endpoint_instance[i].rcv_attributes = 689 ep_descriptor_ptrs[i - 1]->bmAttributes; 690 691 endpoint_instance[i].rcv_packetSize = 692 le16_to_cpu(ep_descriptor_ptrs[i - 1]->wMaxPacketSize); 693 694 endpoint_instance[i].tx_attributes = 695 ep_descriptor_ptrs[i - 1]->bmAttributes; 696 697 endpoint_instance[i].tx_packetSize = 698 le16_to_cpu(ep_descriptor_ptrs[i - 1]->wMaxPacketSize); 699 700 endpoint_instance[i].tx_attributes = 701 ep_descriptor_ptrs[i - 1]->bmAttributes; 702 703 urb_link_init (&endpoint_instance[i].rcv); 704 urb_link_init (&endpoint_instance[i].rdy); 705 urb_link_init (&endpoint_instance[i].tx); 706 urb_link_init (&endpoint_instance[i].done); 707 708 if (endpoint_instance[i].endpoint_address & USB_DIR_IN) 709 endpoint_instance[i].tx_urb = 710 usbd_alloc_urb (device_instance, 711 &endpoint_instance[i]); 712 else 713 endpoint_instance[i].rcv_urb = 714 usbd_alloc_urb (device_instance, 715 &endpoint_instance[i]); 716 } 717 } 718 719 static void usbtty_init_endpoints (void) 720 { 721 int i; 722 723 bus_instance->max_endpoints = NUM_ENDPOINTS + 1; 724 for (i = 1; i <= NUM_ENDPOINTS; i++) { 725 udc_setup_ep (device_instance, i, &endpoint_instance[i]); 726 } 727 } 728 729 /* usbtty_init_terminal_type 730 * 731 * Do some late binding for our device type. 732 */ 733 static void usbtty_init_terminal_type(short type) 734 { 735 switch(type){ 736 /* CDC ACM */ 737 case 0: 738 /* Assign endpoint descriptors */ 739 ep_descriptor_ptrs[0] = 740 &acm_configuration_descriptors[0].notification_endpoint; 741 ep_descriptor_ptrs[1] = 742 &acm_configuration_descriptors[0].data_endpoints[0]; 743 ep_descriptor_ptrs[2] = 744 &acm_configuration_descriptors[0].data_endpoints[1]; 745 746 /* Enumerate Device Descriptor */ 747 device_descriptor.bDeviceClass = 748 COMMUNICATIONS_DEVICE_CLASS; 749 device_descriptor.idProduct = 750 cpu_to_le16(CONFIG_USBD_PRODUCTID_CDCACM); 751 752 /* Assign endpoint indices */ 753 tx_endpoint = ACM_TX_ENDPOINT; 754 rx_endpoint = ACM_RX_ENDPOINT; 755 756 /* Configuration Descriptor */ 757 configuration_descriptor = 758 (struct usb_configuration_descriptor*) 759 &acm_configuration_descriptors; 760 761 /* Interface count */ 762 interface_count = NUM_ACM_INTERFACES; 763 break; 764 765 /* BULK IN/OUT & Default */ 766 case 1: 767 default: 768 /* Assign endpoint descriptors */ 769 ep_descriptor_ptrs[0] = 770 &gserial_configuration_descriptors[0].data_endpoints[0]; 771 ep_descriptor_ptrs[1] = 772 &gserial_configuration_descriptors[0].data_endpoints[1]; 773 ep_descriptor_ptrs[2] = 774 &gserial_configuration_descriptors[0].data_endpoints[2]; 775 776 /* Enumerate Device Descriptor */ 777 device_descriptor.bDeviceClass = 0xFF; 778 device_descriptor.idProduct = 779 cpu_to_le16(CONFIG_USBD_PRODUCTID_GSERIAL); 780 781 /* Assign endpoint indices */ 782 tx_endpoint = GSERIAL_TX_ENDPOINT; 783 rx_endpoint = GSERIAL_RX_ENDPOINT; 784 785 /* Configuration Descriptor */ 786 configuration_descriptor = 787 (struct usb_configuration_descriptor*) 788 &gserial_configuration_descriptors; 789 790 /* Interface count */ 791 interface_count = NUM_GSERIAL_INTERFACES; 792 break; 793 } 794 } 795 796 /******************************************************************************/ 797 798 static struct urb *next_urb (struct usb_device_instance *device, 799 struct usb_endpoint_instance *endpoint) 800 { 801 struct urb *current_urb = NULL; 802 int space; 803 804 /* If there's a queue, then we should add to the last urb */ 805 if (!endpoint->tx_queue) { 806 current_urb = endpoint->tx_urb; 807 } else { 808 /* Last urb from tx chain */ 809 current_urb = 810 p2surround (struct urb, link, endpoint->tx.prev); 811 } 812 813 /* Make sure this one has enough room */ 814 space = current_urb->buffer_length - current_urb->actual_length; 815 if (space > 0) { 816 return current_urb; 817 } else { /* No space here */ 818 /* First look at done list */ 819 current_urb = first_urb_detached (&endpoint->done); 820 if (!current_urb) { 821 current_urb = usbd_alloc_urb (device, endpoint); 822 } 823 824 urb_append (&endpoint->tx, current_urb); 825 endpoint->tx_queue++; 826 } 827 return current_urb; 828 } 829 830 static int write_buffer (circbuf_t * buf) 831 { 832 if (!usbtty_configured ()) { 833 return 0; 834 } 835 836 struct usb_endpoint_instance *endpoint = 837 &endpoint_instance[tx_endpoint]; 838 struct urb *current_urb = NULL; 839 840 current_urb = next_urb (device_instance, endpoint); 841 /* TX data still exists - send it now 842 */ 843 if(endpoint->sent < current_urb->actual_length){ 844 if(udc_endpoint_write (endpoint)){ 845 /* Write pre-empted by RX */ 846 return -1; 847 } 848 } 849 850 if (buf->size) { 851 char *dest; 852 853 int space_avail; 854 int popnum, popped; 855 int total = 0; 856 857 /* Break buffer into urb sized pieces, 858 * and link each to the endpoint 859 */ 860 while (buf->size > 0) { 861 862 if (!current_urb) { 863 TTYERR ("current_urb is NULL, buf->size %d\n", 864 buf->size); 865 return total; 866 } 867 868 dest = (char*)current_urb->buffer + 869 current_urb->actual_length; 870 871 space_avail = 872 current_urb->buffer_length - 873 current_urb->actual_length; 874 popnum = MIN (space_avail, buf->size); 875 if (popnum == 0) 876 break; 877 878 popped = buf_pop (buf, dest, popnum); 879 if (popped == 0) 880 break; 881 current_urb->actual_length += popped; 882 total += popped; 883 884 /* If endpoint->last == 0, then transfers have 885 * not started on this endpoint 886 */ 887 if (endpoint->last == 0) { 888 if(udc_endpoint_write (endpoint)){ 889 /* Write pre-empted by RX */ 890 return -1; 891 } 892 } 893 894 }/* end while */ 895 return total; 896 } 897 898 return 0; 899 } 900 901 static int fill_buffer (circbuf_t * buf) 902 { 903 struct usb_endpoint_instance *endpoint = 904 &endpoint_instance[rx_endpoint]; 905 906 if (endpoint->rcv_urb && endpoint->rcv_urb->actual_length) { 907 unsigned int nb = 0; 908 char *src = (char *) endpoint->rcv_urb->buffer; 909 unsigned int rx_avail = buf->totalsize - buf->size; 910 911 if(rx_avail >= endpoint->rcv_urb->actual_length){ 912 913 nb = endpoint->rcv_urb->actual_length; 914 buf_push (buf, src, nb); 915 endpoint->rcv_urb->actual_length = 0; 916 917 } 918 return nb; 919 } 920 return 0; 921 } 922 923 static int usbtty_configured (void) 924 { 925 return usbtty_configured_flag; 926 } 927 928 /******************************************************************************/ 929 930 static void usbtty_event_handler (struct usb_device_instance *device, 931 usb_device_event_t event, int data) 932 { 933 switch (event) { 934 case DEVICE_RESET: 935 case DEVICE_BUS_INACTIVE: 936 usbtty_configured_flag = 0; 937 break; 938 case DEVICE_CONFIGURED: 939 usbtty_configured_flag = 1; 940 break; 941 942 case DEVICE_ADDRESS_ASSIGNED: 943 usbtty_init_endpoints (); 944 945 default: 946 break; 947 } 948 } 949 950 /******************************************************************************/ 951 952 int usbtty_cdc_setup(struct usb_device_request *request, struct urb *urb) 953 { 954 switch (request->bRequest){ 955 956 case ACM_SET_CONTROL_LINE_STATE: /* Implies DTE ready */ 957 break; 958 case ACM_SEND_ENCAPSULATED_COMMAND : /* Required */ 959 break; 960 case ACM_SET_LINE_ENCODING : /* DTE stop/parity bits 961 * per character */ 962 break; 963 case ACM_GET_ENCAPSULATED_RESPONSE : /* request response */ 964 break; 965 case ACM_GET_LINE_ENCODING : /* request DTE rate, 966 * stop/parity bits */ 967 memcpy (urb->buffer , &rs232_desc, sizeof(rs232_desc)); 968 urb->actual_length = sizeof(rs232_desc); 969 970 break; 971 default: 972 return 1; 973 } 974 return 0; 975 } 976 977 /******************************************************************************/ 978 979 /* 980 * Since interrupt handling has not yet been implemented, we use this function 981 * to handle polling. This is called by the tstc,getc,putc,puts routines to 982 * update the USB state. 983 */ 984 void usbtty_poll (void) 985 { 986 /* New interrupts? */ 987 udc_irq(); 988 989 /* Write any output data to host buffer 990 * (do this before checking interrupts to avoid missing one) 991 */ 992 if (usbtty_configured ()) { 993 write_buffer (&usbtty_output); 994 } 995 996 /* New interrupts? */ 997 udc_irq(); 998 999 /* Check for new data from host.. 1000 * (do this after checking interrupts to get latest data) 1001 */ 1002 if (usbtty_configured ()) { 1003 fill_buffer (&usbtty_input); 1004 } 1005 1006 /* New interrupts? */ 1007 udc_irq(); 1008 1009 } 1010