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 <stdio_dev.h> 28 #include <asm/unaligned.h> 29 #include "usbtty.h" 30 #include "usb_cdc_acm.h" 31 #include "usbdescriptors.h" 32 33 #ifdef DEBUG 34 #define TTYDBG(fmt,args...)\ 35 serial_printf("[%s] %s %d: "fmt, __FILE__,__FUNCTION__,__LINE__,##args) 36 #else 37 #define TTYDBG(fmt,args...) do{}while(0) 38 #endif 39 40 #if 1 41 #define TTYERR(fmt,args...)\ 42 serial_printf("ERROR![%s] %s %d: "fmt, __FILE__,__FUNCTION__,\ 43 __LINE__,##args) 44 #else 45 #define TTYERR(fmt,args...) do{}while(0) 46 #endif 47 48 /* 49 * Defines 50 */ 51 #define NUM_CONFIGS 1 52 #define MAX_INTERFACES 2 53 #define NUM_ENDPOINTS 3 54 #define ACM_TX_ENDPOINT 3 55 #define ACM_RX_ENDPOINT 2 56 #define GSERIAL_TX_ENDPOINT 2 57 #define GSERIAL_RX_ENDPOINT 1 58 #define NUM_ACM_INTERFACES 2 59 #define NUM_GSERIAL_INTERFACES 1 60 #define CONFIG_USBD_DATA_INTERFACE_STR "Bulk Data Interface" 61 #define CONFIG_USBD_CTRL_INTERFACE_STR "Control Interface" 62 63 /* 64 * Buffers to hold input and output data 65 */ 66 #define USBTTY_BUFFER_SIZE 256 67 static circbuf_t usbtty_input; 68 static circbuf_t usbtty_output; 69 70 71 /* 72 * Instance variables 73 */ 74 static struct stdio_dev usbttydev; 75 static struct usb_device_instance device_instance[1]; 76 static struct usb_bus_instance bus_instance[1]; 77 static struct usb_configuration_instance config_instance[NUM_CONFIGS]; 78 static struct usb_interface_instance interface_instance[MAX_INTERFACES]; 79 static struct usb_alternate_instance alternate_instance[MAX_INTERFACES]; 80 /* one extra for control endpoint */ 81 static struct usb_endpoint_instance endpoint_instance[NUM_ENDPOINTS+1]; 82 83 /* 84 * Global flag 85 */ 86 int usbtty_configured_flag = 0; 87 88 /* 89 * Serial number 90 */ 91 static char serial_number[16]; 92 93 94 /* 95 * Descriptors, Strings, Local variables. 96 */ 97 98 /* defined and used by gadget/ep0.c */ 99 extern struct usb_string_descriptor **usb_strings; 100 101 /* Indicies, References */ 102 static unsigned short rx_endpoint = 0; 103 static unsigned short tx_endpoint = 0; 104 static unsigned short interface_count = 0; 105 static struct usb_string_descriptor *usbtty_string_table[STR_COUNT]; 106 107 /* USB Descriptor Strings */ 108 static u8 wstrLang[4] = {4,USB_DT_STRING,0x9,0x4}; 109 static u8 wstrManufacturer[2 + 2*(sizeof(CONFIG_USBD_MANUFACTURER)-1)]; 110 static u8 wstrProduct[2 + 2*(sizeof(CONFIG_USBD_PRODUCT_NAME)-1)]; 111 static u8 wstrSerial[2 + 2*(sizeof(serial_number) - 1)]; 112 static u8 wstrConfiguration[2 + 2*(sizeof(CONFIG_USBD_CONFIGURATION_STR)-1)]; 113 static u8 wstrDataInterface[2 + 2*(sizeof(CONFIG_USBD_DATA_INTERFACE_STR)-1)]; 114 static u8 wstrCtrlInterface[2 + 2*(sizeof(CONFIG_USBD_DATA_INTERFACE_STR)-1)]; 115 116 /* Standard USB Data Structures */ 117 static struct usb_interface_descriptor interface_descriptors[MAX_INTERFACES]; 118 static struct usb_endpoint_descriptor *ep_descriptor_ptrs[NUM_ENDPOINTS]; 119 static struct usb_configuration_descriptor *configuration_descriptor = 0; 120 static struct usb_device_descriptor device_descriptor = { 121 .bLength = sizeof(struct usb_device_descriptor), 122 .bDescriptorType = USB_DT_DEVICE, 123 .bcdUSB = cpu_to_le16(USB_BCD_VERSION), 124 .bDeviceSubClass = 0x00, 125 .bDeviceProtocol = 0x00, 126 .bMaxPacketSize0 = EP0_MAX_PACKET_SIZE, 127 .idVendor = cpu_to_le16(CONFIG_USBD_VENDORID), 128 .bcdDevice = cpu_to_le16(USBTTY_BCD_DEVICE), 129 .iManufacturer = STR_MANUFACTURER, 130 .iProduct = STR_PRODUCT, 131 .iSerialNumber = STR_SERIAL, 132 .bNumConfigurations = NUM_CONFIGS 133 }; 134 135 136 /* 137 * Static CDC ACM specific descriptors 138 */ 139 140 struct acm_config_desc { 141 struct usb_configuration_descriptor configuration_desc; 142 143 /* Master Interface */ 144 struct usb_interface_descriptor interface_desc; 145 146 struct usb_class_header_function_descriptor usb_class_header; 147 struct usb_class_call_management_descriptor usb_class_call_mgt; 148 struct usb_class_abstract_control_descriptor usb_class_acm; 149 struct usb_class_union_function_descriptor usb_class_union; 150 struct usb_endpoint_descriptor notification_endpoint; 151 152 /* Slave Interface */ 153 struct usb_interface_descriptor data_class_interface; 154 struct usb_endpoint_descriptor data_endpoints[NUM_ENDPOINTS-1]; 155 } __attribute__((packed)); 156 157 static struct acm_config_desc acm_configuration_descriptors[NUM_CONFIGS] = { 158 { 159 .configuration_desc ={ 160 .bLength = 161 sizeof(struct usb_configuration_descriptor), 162 .bDescriptorType = USB_DT_CONFIG, 163 .wTotalLength = 164 cpu_to_le16(sizeof(struct acm_config_desc)), 165 .bNumInterfaces = NUM_ACM_INTERFACES, 166 .bConfigurationValue = 1, 167 .iConfiguration = STR_CONFIG, 168 .bmAttributes = 169 BMATTRIBUTE_SELF_POWERED|BMATTRIBUTE_RESERVED, 170 .bMaxPower = USBTTY_MAXPOWER 171 }, 172 /* Interface 1 */ 173 .interface_desc = { 174 .bLength = sizeof(struct usb_interface_descriptor), 175 .bDescriptorType = USB_DT_INTERFACE, 176 .bInterfaceNumber = 0, 177 .bAlternateSetting = 0, 178 .bNumEndpoints = 0x01, 179 .bInterfaceClass = 180 COMMUNICATIONS_INTERFACE_CLASS_CONTROL, 181 .bInterfaceSubClass = COMMUNICATIONS_ACM_SUBCLASS, 182 .bInterfaceProtocol = COMMUNICATIONS_V25TER_PROTOCOL, 183 .iInterface = STR_CTRL_INTERFACE, 184 }, 185 .usb_class_header = { 186 .bFunctionLength = 187 sizeof(struct usb_class_header_function_descriptor), 188 .bDescriptorType = CS_INTERFACE, 189 .bDescriptorSubtype = USB_ST_HEADER, 190 .bcdCDC = cpu_to_le16(110), 191 }, 192 .usb_class_call_mgt = { 193 .bFunctionLength = 194 sizeof(struct usb_class_call_management_descriptor), 195 .bDescriptorType = CS_INTERFACE, 196 .bDescriptorSubtype = USB_ST_CMF, 197 .bmCapabilities = 0x00, 198 .bDataInterface = 0x01, 199 }, 200 .usb_class_acm = { 201 .bFunctionLength = 202 sizeof(struct usb_class_abstract_control_descriptor), 203 .bDescriptorType = CS_INTERFACE, 204 .bDescriptorSubtype = USB_ST_ACMF, 205 .bmCapabilities = 0x00, 206 }, 207 .usb_class_union = { 208 .bFunctionLength = 209 sizeof(struct usb_class_union_function_descriptor), 210 .bDescriptorType = CS_INTERFACE, 211 .bDescriptorSubtype = USB_ST_UF, 212 .bMasterInterface = 0x00, 213 .bSlaveInterface0 = 0x01, 214 }, 215 .notification_endpoint = { 216 .bLength = 217 sizeof(struct usb_endpoint_descriptor), 218 .bDescriptorType = USB_DT_ENDPOINT, 219 .bEndpointAddress = UDC_INT_ENDPOINT | USB_DIR_IN, 220 .bmAttributes = USB_ENDPOINT_XFER_INT, 221 .wMaxPacketSize 222 = cpu_to_le16(CONFIG_USBD_SERIAL_INT_PKTSIZE), 223 .bInterval = 0xFF, 224 }, 225 226 /* Interface 2 */ 227 .data_class_interface = { 228 .bLength = 229 sizeof(struct usb_interface_descriptor), 230 .bDescriptorType = USB_DT_INTERFACE, 231 .bInterfaceNumber = 0x01, 232 .bAlternateSetting = 0x00, 233 .bNumEndpoints = 0x02, 234 .bInterfaceClass = 235 COMMUNICATIONS_INTERFACE_CLASS_DATA, 236 .bInterfaceSubClass = DATA_INTERFACE_SUBCLASS_NONE, 237 .bInterfaceProtocol = DATA_INTERFACE_PROTOCOL_NONE, 238 .iInterface = STR_DATA_INTERFACE, 239 }, 240 .data_endpoints = { 241 { 242 .bLength = 243 sizeof(struct usb_endpoint_descriptor), 244 .bDescriptorType = USB_DT_ENDPOINT, 245 .bEndpointAddress = UDC_OUT_ENDPOINT | USB_DIR_OUT, 246 .bmAttributes = 247 USB_ENDPOINT_XFER_BULK, 248 .wMaxPacketSize = 249 cpu_to_le16(CONFIG_USBD_SERIAL_BULK_PKTSIZE), 250 .bInterval = 0xFF, 251 }, 252 { 253 .bLength = 254 sizeof(struct usb_endpoint_descriptor), 255 .bDescriptorType = USB_DT_ENDPOINT, 256 .bEndpointAddress = UDC_IN_ENDPOINT | USB_DIR_IN, 257 .bmAttributes = 258 USB_ENDPOINT_XFER_BULK, 259 .wMaxPacketSize = 260 cpu_to_le16(CONFIG_USBD_SERIAL_BULK_PKTSIZE), 261 .bInterval = 0xFF, 262 }, 263 }, 264 }, 265 }; 266 267 static struct rs232_emu rs232_desc={ 268 .dter = 115200, 269 .stop_bits = 0x00, 270 .parity = 0x00, 271 .data_bits = 0x08 272 }; 273 274 275 /* 276 * Static Generic Serial specific data 277 */ 278 279 280 struct gserial_config_desc { 281 282 struct usb_configuration_descriptor configuration_desc; 283 struct usb_interface_descriptor interface_desc[NUM_GSERIAL_INTERFACES]; 284 struct usb_endpoint_descriptor data_endpoints[NUM_ENDPOINTS]; 285 286 } __attribute__((packed)); 287 288 static struct gserial_config_desc 289 gserial_configuration_descriptors[NUM_CONFIGS] ={ 290 { 291 .configuration_desc ={ 292 .bLength = sizeof(struct usb_configuration_descriptor), 293 .bDescriptorType = USB_DT_CONFIG, 294 .wTotalLength = 295 cpu_to_le16(sizeof(struct gserial_config_desc)), 296 .bNumInterfaces = NUM_GSERIAL_INTERFACES, 297 .bConfigurationValue = 1, 298 .iConfiguration = STR_CONFIG, 299 .bmAttributes = 300 BMATTRIBUTE_SELF_POWERED|BMATTRIBUTE_RESERVED, 301 .bMaxPower = USBTTY_MAXPOWER 302 }, 303 .interface_desc = { 304 { 305 .bLength = 306 sizeof(struct usb_interface_descriptor), 307 .bDescriptorType = USB_DT_INTERFACE, 308 .bInterfaceNumber = 0, 309 .bAlternateSetting = 0, 310 .bNumEndpoints = NUM_ENDPOINTS, 311 .bInterfaceClass = 312 COMMUNICATIONS_INTERFACE_CLASS_VENDOR, 313 .bInterfaceSubClass = 314 COMMUNICATIONS_NO_SUBCLASS, 315 .bInterfaceProtocol = 316 COMMUNICATIONS_NO_PROTOCOL, 317 .iInterface = STR_DATA_INTERFACE 318 }, 319 }, 320 .data_endpoints = { 321 { 322 .bLength = 323 sizeof(struct usb_endpoint_descriptor), 324 .bDescriptorType = USB_DT_ENDPOINT, 325 .bEndpointAddress = UDC_OUT_ENDPOINT | USB_DIR_OUT, 326 .bmAttributes = USB_ENDPOINT_XFER_BULK, 327 .wMaxPacketSize = 328 cpu_to_le16(CONFIG_USBD_SERIAL_OUT_PKTSIZE), 329 .bInterval= 0xFF, 330 }, 331 { 332 .bLength = 333 sizeof(struct usb_endpoint_descriptor), 334 .bDescriptorType = USB_DT_ENDPOINT, 335 .bEndpointAddress = UDC_IN_ENDPOINT | USB_DIR_IN, 336 .bmAttributes = USB_ENDPOINT_XFER_BULK, 337 .wMaxPacketSize = 338 cpu_to_le16(CONFIG_USBD_SERIAL_IN_PKTSIZE), 339 .bInterval = 0xFF, 340 }, 341 { 342 .bLength = 343 sizeof(struct usb_endpoint_descriptor), 344 .bDescriptorType = USB_DT_ENDPOINT, 345 .bEndpointAddress = UDC_INT_ENDPOINT | USB_DIR_IN, 346 .bmAttributes = USB_ENDPOINT_XFER_INT, 347 .wMaxPacketSize = 348 cpu_to_le16(CONFIG_USBD_SERIAL_INT_PKTSIZE), 349 .bInterval = 0xFF, 350 }, 351 }, 352 }, 353 }; 354 355 /* 356 * Static Function Prototypes 357 */ 358 359 static void usbtty_init_strings (void); 360 static void usbtty_init_instances (void); 361 static void usbtty_init_endpoints (void); 362 static void usbtty_init_terminal_type(short type); 363 static void usbtty_event_handler (struct usb_device_instance *device, 364 usb_device_event_t event, int data); 365 static int usbtty_cdc_setup(struct usb_device_request *request, 366 struct urb *urb); 367 static int usbtty_configured (void); 368 static int write_buffer (circbuf_t * buf); 369 static int fill_buffer (circbuf_t * buf); 370 371 void usbtty_poll (void); 372 373 /* utility function for converting char* to wide string used by USB */ 374 static void str2wide (char *str, u16 * wide) 375 { 376 int i; 377 for (i = 0; i < strlen (str) && str[i]; i++){ 378 #if defined(__LITTLE_ENDIAN) 379 wide[i] = (u16) str[i]; 380 #elif defined(__BIG_ENDIAN) 381 wide[i] = ((u16)(str[i])<<8); 382 #else 383 #error "__LITTLE_ENDIAN or __BIG_ENDIAN undefined" 384 #endif 385 } 386 } 387 388 /* 389 * Test whether a character is in the RX buffer 390 */ 391 392 int usbtty_tstc (void) 393 { 394 struct usb_endpoint_instance *endpoint = 395 &endpoint_instance[rx_endpoint]; 396 397 /* If no input data exists, allow more RX to be accepted */ 398 if(usbtty_input.size <= 0){ 399 udc_unset_nak(endpoint->endpoint_address&0x03); 400 } 401 402 usbtty_poll (); 403 return (usbtty_input.size > 0); 404 } 405 406 /* 407 * Read a single byte from the usb client port. Returns 1 on success, 0 408 * otherwise. When the function is succesfull, the character read is 409 * written into its argument c. 410 */ 411 412 int usbtty_getc (void) 413 { 414 char c; 415 struct usb_endpoint_instance *endpoint = 416 &endpoint_instance[rx_endpoint]; 417 418 while (usbtty_input.size <= 0) { 419 udc_unset_nak(endpoint->endpoint_address&0x03); 420 usbtty_poll (); 421 } 422 423 buf_pop (&usbtty_input, &c, 1); 424 udc_set_nak(endpoint->endpoint_address&0x03); 425 426 return c; 427 } 428 429 /* 430 * Output a single byte to the usb client port. 431 */ 432 void usbtty_putc (const char c) 433 { 434 if (!usbtty_configured ()) 435 return; 436 437 buf_push (&usbtty_output, &c, 1); 438 /* If \n, also do \r */ 439 if (c == '\n') 440 buf_push (&usbtty_output, "\r", 1); 441 442 /* Poll at end to handle new data... */ 443 if ((usbtty_output.size + 2) >= usbtty_output.totalsize) { 444 usbtty_poll (); 445 } 446 } 447 448 /* usbtty_puts() helper function for finding the next '\n' in a string */ 449 static int next_nl_pos (const char *s) 450 { 451 int i; 452 453 for (i = 0; s[i] != '\0'; i++) { 454 if (s[i] == '\n') 455 return i; 456 } 457 return i; 458 } 459 460 /* 461 * Output a string to the usb client port - implementing flow control 462 */ 463 464 static void __usbtty_puts (const char *str, int len) 465 { 466 int maxlen = usbtty_output.totalsize; 467 int space, n; 468 469 /* break str into chunks < buffer size, if needed */ 470 while (len > 0) { 471 usbtty_poll (); 472 473 space = maxlen - usbtty_output.size; 474 /* Empty buffer here, if needed, to ensure space... */ 475 if (space) { 476 write_buffer (&usbtty_output); 477 478 n = MIN (space, MIN (len, maxlen)); 479 buf_push (&usbtty_output, str, n); 480 481 str += n; 482 len -= n; 483 } 484 } 485 } 486 487 void usbtty_puts (const char *str) 488 { 489 int n; 490 int len; 491 492 if (!usbtty_configured ()) 493 return; 494 495 len = strlen (str); 496 /* add '\r' for each '\n' */ 497 while (len > 0) { 498 n = next_nl_pos (str); 499 500 if (str[n] == '\n') { 501 __usbtty_puts (str, n + 1); 502 __usbtty_puts ("\r", 1); 503 str += (n + 1); 504 len -= (n + 1); 505 } else { 506 /* No \n found. All done. */ 507 __usbtty_puts (str, n); 508 break; 509 } 510 } 511 512 /* Poll at end to handle new data... */ 513 usbtty_poll (); 514 } 515 516 /* 517 * Initialize the usb client port. 518 * 519 */ 520 int drv_usbtty_init (void) 521 { 522 int rc; 523 char * sn; 524 char * tt; 525 int snlen; 526 527 /* Ger seiral number */ 528 if (!(sn = getenv("serial#"))) { 529 sn = "000000000000"; 530 } 531 snlen = strlen(sn); 532 if (snlen > sizeof(serial_number) - 1) { 533 printf ("Warning: serial number %s is too long (%d > %lu)\n", 534 sn, snlen, (ulong)(sizeof(serial_number) - 1)); 535 snlen = sizeof(serial_number) - 1; 536 } 537 memcpy (serial_number, sn, snlen); 538 serial_number[snlen] = '\0'; 539 540 /* Decide on which type of UDC device to be. 541 */ 542 543 if(!(tt = getenv("usbtty"))) { 544 tt = "generic"; 545 } 546 usbtty_init_terminal_type(strcmp(tt,"cdc_acm")); 547 548 /* prepare buffers... */ 549 buf_init (&usbtty_input, USBTTY_BUFFER_SIZE); 550 buf_init (&usbtty_output, USBTTY_BUFFER_SIZE); 551 552 /* Now, set up USB controller and infrastructure */ 553 udc_init (); /* Basic USB initialization */ 554 555 usbtty_init_strings (); 556 usbtty_init_instances (); 557 558 usbtty_init_endpoints (); 559 560 udc_startup_events (device_instance);/* Enable dev, init udc pointers */ 561 udc_connect (); /* Enable pullup for host detection */ 562 563 /* Device initialization */ 564 memset (&usbttydev, 0, sizeof (usbttydev)); 565 566 strcpy (usbttydev.name, "usbtty"); 567 usbttydev.ext = 0; /* No extensions */ 568 usbttydev.flags = DEV_FLAGS_INPUT | DEV_FLAGS_OUTPUT; 569 usbttydev.tstc = usbtty_tstc; /* 'tstc' function */ 570 usbttydev.getc = usbtty_getc; /* 'getc' function */ 571 usbttydev.putc = usbtty_putc; /* 'putc' function */ 572 usbttydev.puts = usbtty_puts; /* 'puts' function */ 573 574 rc = stdio_register (&usbttydev); 575 576 return (rc == 0) ? 1 : rc; 577 } 578 579 static void usbtty_init_strings (void) 580 { 581 struct usb_string_descriptor *string; 582 583 usbtty_string_table[STR_LANG] = 584 (struct usb_string_descriptor*)wstrLang; 585 586 string = (struct usb_string_descriptor *) wstrManufacturer; 587 string->bLength = sizeof(wstrManufacturer); 588 string->bDescriptorType = USB_DT_STRING; 589 str2wide (CONFIG_USBD_MANUFACTURER, string->wData); 590 usbtty_string_table[STR_MANUFACTURER]=string; 591 592 593 string = (struct usb_string_descriptor *) wstrProduct; 594 string->bLength = sizeof(wstrProduct); 595 string->bDescriptorType = USB_DT_STRING; 596 str2wide (CONFIG_USBD_PRODUCT_NAME, string->wData); 597 usbtty_string_table[STR_PRODUCT]=string; 598 599 600 string = (struct usb_string_descriptor *) wstrSerial; 601 string->bLength = sizeof(serial_number); 602 string->bDescriptorType = USB_DT_STRING; 603 str2wide (serial_number, string->wData); 604 usbtty_string_table[STR_SERIAL]=string; 605 606 607 string = (struct usb_string_descriptor *) wstrConfiguration; 608 string->bLength = sizeof(wstrConfiguration); 609 string->bDescriptorType = USB_DT_STRING; 610 str2wide (CONFIG_USBD_CONFIGURATION_STR, string->wData); 611 usbtty_string_table[STR_CONFIG]=string; 612 613 614 string = (struct usb_string_descriptor *) wstrDataInterface; 615 string->bLength = sizeof(wstrDataInterface); 616 string->bDescriptorType = USB_DT_STRING; 617 str2wide (CONFIG_USBD_DATA_INTERFACE_STR, string->wData); 618 usbtty_string_table[STR_DATA_INTERFACE]=string; 619 620 string = (struct usb_string_descriptor *) wstrCtrlInterface; 621 string->bLength = sizeof(wstrCtrlInterface); 622 string->bDescriptorType = USB_DT_STRING; 623 str2wide (CONFIG_USBD_CTRL_INTERFACE_STR, string->wData); 624 usbtty_string_table[STR_CTRL_INTERFACE]=string; 625 626 /* Now, initialize the string table for ep0 handling */ 627 usb_strings = usbtty_string_table; 628 } 629 630 #define init_wMaxPacketSize(x) le16_to_cpu(get_unaligned(\ 631 &ep_descriptor_ptrs[(x) - 1]->wMaxPacketSize)); 632 633 static void usbtty_init_instances (void) 634 { 635 int i; 636 637 /* initialize device instance */ 638 memset (device_instance, 0, sizeof (struct usb_device_instance)); 639 device_instance->device_state = STATE_INIT; 640 device_instance->device_descriptor = &device_descriptor; 641 device_instance->event = usbtty_event_handler; 642 device_instance->cdc_recv_setup = usbtty_cdc_setup; 643 device_instance->bus = bus_instance; 644 device_instance->configurations = NUM_CONFIGS; 645 device_instance->configuration_instance_array = config_instance; 646 647 /* initialize bus instance */ 648 memset (bus_instance, 0, sizeof (struct usb_bus_instance)); 649 bus_instance->device = device_instance; 650 bus_instance->endpoint_array = endpoint_instance; 651 bus_instance->max_endpoints = 1; 652 bus_instance->maxpacketsize = 64; 653 bus_instance->serial_number_str = serial_number; 654 655 /* configuration instance */ 656 memset (config_instance, 0, 657 sizeof (struct usb_configuration_instance)); 658 config_instance->interfaces = interface_count; 659 config_instance->configuration_descriptor = configuration_descriptor; 660 config_instance->interface_instance_array = interface_instance; 661 662 /* interface instance */ 663 memset (interface_instance, 0, 664 sizeof (struct usb_interface_instance)); 665 interface_instance->alternates = 1; 666 interface_instance->alternates_instance_array = alternate_instance; 667 668 /* alternates instance */ 669 memset (alternate_instance, 0, 670 sizeof (struct usb_alternate_instance)); 671 alternate_instance->interface_descriptor = interface_descriptors; 672 alternate_instance->endpoints = NUM_ENDPOINTS; 673 alternate_instance->endpoints_descriptor_array = ep_descriptor_ptrs; 674 675 /* endpoint instances */ 676 memset (&endpoint_instance[0], 0, 677 sizeof (struct usb_endpoint_instance)); 678 endpoint_instance[0].endpoint_address = 0; 679 endpoint_instance[0].rcv_packetSize = EP0_MAX_PACKET_SIZE; 680 endpoint_instance[0].rcv_attributes = USB_ENDPOINT_XFER_CONTROL; 681 endpoint_instance[0].tx_packetSize = EP0_MAX_PACKET_SIZE; 682 endpoint_instance[0].tx_attributes = USB_ENDPOINT_XFER_CONTROL; 683 udc_setup_ep (device_instance, 0, &endpoint_instance[0]); 684 685 for (i = 1; i <= NUM_ENDPOINTS; i++) { 686 memset (&endpoint_instance[i], 0, 687 sizeof (struct usb_endpoint_instance)); 688 689 endpoint_instance[i].endpoint_address = 690 ep_descriptor_ptrs[i - 1]->bEndpointAddress; 691 692 endpoint_instance[i].rcv_attributes = 693 ep_descriptor_ptrs[i - 1]->bmAttributes; 694 695 endpoint_instance[i].rcv_packetSize = init_wMaxPacketSize(i); 696 697 endpoint_instance[i].tx_attributes = 698 ep_descriptor_ptrs[i - 1]->bmAttributes; 699 700 endpoint_instance[i].tx_packetSize = init_wMaxPacketSize(i); 701 702 endpoint_instance[i].tx_attributes = 703 ep_descriptor_ptrs[i - 1]->bmAttributes; 704 705 urb_link_init (&endpoint_instance[i].rcv); 706 urb_link_init (&endpoint_instance[i].rdy); 707 urb_link_init (&endpoint_instance[i].tx); 708 urb_link_init (&endpoint_instance[i].done); 709 710 if (endpoint_instance[i].endpoint_address & USB_DIR_IN) 711 endpoint_instance[i].tx_urb = 712 usbd_alloc_urb (device_instance, 713 &endpoint_instance[i]); 714 else 715 endpoint_instance[i].rcv_urb = 716 usbd_alloc_urb (device_instance, 717 &endpoint_instance[i]); 718 } 719 } 720 721 static void usbtty_init_endpoints (void) 722 { 723 int i; 724 725 bus_instance->max_endpoints = NUM_ENDPOINTS + 1; 726 for (i = 1; i <= NUM_ENDPOINTS; i++) { 727 udc_setup_ep (device_instance, i, &endpoint_instance[i]); 728 } 729 } 730 731 /* usbtty_init_terminal_type 732 * 733 * Do some late binding for our device type. 734 */ 735 static void usbtty_init_terminal_type(short type) 736 { 737 switch(type){ 738 /* CDC ACM */ 739 case 0: 740 /* Assign endpoint descriptors */ 741 ep_descriptor_ptrs[0] = 742 &acm_configuration_descriptors[0].notification_endpoint; 743 ep_descriptor_ptrs[1] = 744 &acm_configuration_descriptors[0].data_endpoints[0]; 745 ep_descriptor_ptrs[2] = 746 &acm_configuration_descriptors[0].data_endpoints[1]; 747 748 /* Enumerate Device Descriptor */ 749 device_descriptor.bDeviceClass = 750 COMMUNICATIONS_DEVICE_CLASS; 751 device_descriptor.idProduct = 752 cpu_to_le16(CONFIG_USBD_PRODUCTID_CDCACM); 753 754 /* Assign endpoint indices */ 755 tx_endpoint = ACM_TX_ENDPOINT; 756 rx_endpoint = ACM_RX_ENDPOINT; 757 758 /* Configuration Descriptor */ 759 configuration_descriptor = 760 (struct usb_configuration_descriptor*) 761 &acm_configuration_descriptors; 762 763 /* Interface count */ 764 interface_count = NUM_ACM_INTERFACES; 765 break; 766 767 /* BULK IN/OUT & Default */ 768 case 1: 769 default: 770 /* Assign endpoint descriptors */ 771 ep_descriptor_ptrs[0] = 772 &gserial_configuration_descriptors[0].data_endpoints[0]; 773 ep_descriptor_ptrs[1] = 774 &gserial_configuration_descriptors[0].data_endpoints[1]; 775 ep_descriptor_ptrs[2] = 776 &gserial_configuration_descriptors[0].data_endpoints[2]; 777 778 /* Enumerate Device Descriptor */ 779 device_descriptor.bDeviceClass = 0xFF; 780 device_descriptor.idProduct = 781 cpu_to_le16(CONFIG_USBD_PRODUCTID_GSERIAL); 782 783 /* Assign endpoint indices */ 784 tx_endpoint = GSERIAL_TX_ENDPOINT; 785 rx_endpoint = GSERIAL_RX_ENDPOINT; 786 787 /* Configuration Descriptor */ 788 configuration_descriptor = 789 (struct usb_configuration_descriptor*) 790 &gserial_configuration_descriptors; 791 792 /* Interface count */ 793 interface_count = NUM_GSERIAL_INTERFACES; 794 break; 795 } 796 } 797 798 /******************************************************************************/ 799 800 static struct urb *next_urb (struct usb_device_instance *device, 801 struct usb_endpoint_instance *endpoint) 802 { 803 struct urb *current_urb = NULL; 804 int space; 805 806 /* If there's a queue, then we should add to the last urb */ 807 if (!endpoint->tx_queue) { 808 current_urb = endpoint->tx_urb; 809 } else { 810 /* Last urb from tx chain */ 811 current_urb = 812 p2surround (struct urb, link, endpoint->tx.prev); 813 } 814 815 /* Make sure this one has enough room */ 816 space = current_urb->buffer_length - current_urb->actual_length; 817 if (space > 0) { 818 return current_urb; 819 } else { /* No space here */ 820 /* First look at done list */ 821 current_urb = first_urb_detached (&endpoint->done); 822 if (!current_urb) { 823 current_urb = usbd_alloc_urb (device, endpoint); 824 } 825 826 urb_append (&endpoint->tx, current_urb); 827 endpoint->tx_queue++; 828 } 829 return current_urb; 830 } 831 832 static int write_buffer (circbuf_t * buf) 833 { 834 if (!usbtty_configured ()) { 835 return 0; 836 } 837 838 struct usb_endpoint_instance *endpoint = 839 &endpoint_instance[tx_endpoint]; 840 struct urb *current_urb = NULL; 841 842 current_urb = next_urb (device_instance, endpoint); 843 /* TX data still exists - send it now 844 */ 845 if(endpoint->sent < current_urb->actual_length){ 846 if(udc_endpoint_write (endpoint)){ 847 /* Write pre-empted by RX */ 848 return -1; 849 } 850 } 851 852 if (buf->size) { 853 char *dest; 854 855 int space_avail; 856 int popnum, popped; 857 int total = 0; 858 859 /* Break buffer into urb sized pieces, 860 * and link each to the endpoint 861 */ 862 while (buf->size > 0) { 863 864 if (!current_urb) { 865 TTYERR ("current_urb is NULL, buf->size %d\n", 866 buf->size); 867 return total; 868 } 869 870 dest = (char*)current_urb->buffer + 871 current_urb->actual_length; 872 873 space_avail = 874 current_urb->buffer_length - 875 current_urb->actual_length; 876 popnum = MIN (space_avail, buf->size); 877 if (popnum == 0) 878 break; 879 880 popped = buf_pop (buf, dest, popnum); 881 if (popped == 0) 882 break; 883 current_urb->actual_length += popped; 884 total += popped; 885 886 /* If endpoint->last == 0, then transfers have 887 * not started on this endpoint 888 */ 889 if (endpoint->last == 0) { 890 if(udc_endpoint_write (endpoint)){ 891 /* Write pre-empted by RX */ 892 return -1; 893 } 894 } 895 896 }/* end while */ 897 return total; 898 } 899 900 return 0; 901 } 902 903 static int fill_buffer (circbuf_t * buf) 904 { 905 struct usb_endpoint_instance *endpoint = 906 &endpoint_instance[rx_endpoint]; 907 908 if (endpoint->rcv_urb && endpoint->rcv_urb->actual_length) { 909 unsigned int nb = 0; 910 char *src = (char *) endpoint->rcv_urb->buffer; 911 unsigned int rx_avail = buf->totalsize - buf->size; 912 913 if(rx_avail >= endpoint->rcv_urb->actual_length){ 914 915 nb = endpoint->rcv_urb->actual_length; 916 buf_push (buf, src, nb); 917 endpoint->rcv_urb->actual_length = 0; 918 919 } 920 return nb; 921 } 922 return 0; 923 } 924 925 static int usbtty_configured (void) 926 { 927 return usbtty_configured_flag; 928 } 929 930 /******************************************************************************/ 931 932 static void usbtty_event_handler (struct usb_device_instance *device, 933 usb_device_event_t event, int data) 934 { 935 switch (event) { 936 case DEVICE_RESET: 937 case DEVICE_BUS_INACTIVE: 938 usbtty_configured_flag = 0; 939 break; 940 case DEVICE_CONFIGURED: 941 usbtty_configured_flag = 1; 942 break; 943 944 case DEVICE_ADDRESS_ASSIGNED: 945 usbtty_init_endpoints (); 946 947 default: 948 break; 949 } 950 } 951 952 /******************************************************************************/ 953 954 int usbtty_cdc_setup(struct usb_device_request *request, struct urb *urb) 955 { 956 switch (request->bRequest){ 957 958 case ACM_SET_CONTROL_LINE_STATE: /* Implies DTE ready */ 959 break; 960 case ACM_SEND_ENCAPSULATED_COMMAND : /* Required */ 961 break; 962 case ACM_SET_LINE_ENCODING : /* DTE stop/parity bits 963 * per character */ 964 break; 965 case ACM_GET_ENCAPSULATED_RESPONSE : /* request response */ 966 break; 967 case ACM_GET_LINE_ENCODING : /* request DTE rate, 968 * stop/parity bits */ 969 memcpy (urb->buffer , &rs232_desc, sizeof(rs232_desc)); 970 urb->actual_length = sizeof(rs232_desc); 971 972 break; 973 default: 974 return 1; 975 } 976 return 0; 977 } 978 979 /******************************************************************************/ 980 981 /* 982 * Since interrupt handling has not yet been implemented, we use this function 983 * to handle polling. This is called by the tstc,getc,putc,puts routines to 984 * update the USB state. 985 */ 986 void usbtty_poll (void) 987 { 988 /* New interrupts? */ 989 udc_irq(); 990 991 /* Write any output data to host buffer 992 * (do this before checking interrupts to avoid missing one) 993 */ 994 if (usbtty_configured ()) { 995 write_buffer (&usbtty_output); 996 } 997 998 /* New interrupts? */ 999 udc_irq(); 1000 1001 /* Check for new data from host.. 1002 * (do this after checking interrupts to get latest data) 1003 */ 1004 if (usbtty_configured ()) { 1005 fill_buffer (&usbtty_input); 1006 } 1007 1008 /* New interrupts? */ 1009 udc_irq(); 1010 1011 } 1012