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 * SPDX-License-Identifier: GPL-2.0+ 9 */ 10 11 #include <common.h> 12 #include <config.h> 13 #include <circbuf.h> 14 #include <stdio_dev.h> 15 #include <asm/unaligned.h> 16 #include "usbtty.h" 17 #include "usb_cdc_acm.h" 18 #include "usbdescriptors.h" 19 20 #ifdef DEBUG 21 #define TTYDBG(fmt,args...)\ 22 serial_printf("[%s] %s %d: "fmt, __FILE__,__FUNCTION__,__LINE__,##args) 23 #else 24 #define TTYDBG(fmt,args...) do{}while(0) 25 #endif 26 27 #if 1 28 #define TTYERR(fmt,args...)\ 29 serial_printf("ERROR![%s] %s %d: "fmt, __FILE__,__FUNCTION__,\ 30 __LINE__,##args) 31 #else 32 #define TTYERR(fmt,args...) do{}while(0) 33 #endif 34 35 /* 36 * Defines 37 */ 38 #define NUM_CONFIGS 1 39 #define MAX_INTERFACES 2 40 #define NUM_ENDPOINTS 3 41 #define ACM_TX_ENDPOINT 3 42 #define ACM_RX_ENDPOINT 2 43 #define GSERIAL_TX_ENDPOINT 2 44 #define GSERIAL_RX_ENDPOINT 1 45 #define NUM_ACM_INTERFACES 2 46 #define NUM_GSERIAL_INTERFACES 1 47 #define CONFIG_USBD_DATA_INTERFACE_STR "Bulk Data Interface" 48 #define CONFIG_USBD_CTRL_INTERFACE_STR "Control Interface" 49 50 /* 51 * Buffers to hold input and output data 52 */ 53 #define USBTTY_BUFFER_SIZE 2048 54 static circbuf_t usbtty_input; 55 static circbuf_t usbtty_output; 56 57 58 /* 59 * Instance variables 60 */ 61 static struct stdio_dev usbttydev; 62 static struct usb_device_instance device_instance[1]; 63 static struct usb_bus_instance bus_instance[1]; 64 static struct usb_configuration_instance config_instance[NUM_CONFIGS]; 65 static struct usb_interface_instance interface_instance[MAX_INTERFACES]; 66 static struct usb_alternate_instance alternate_instance[MAX_INTERFACES]; 67 /* one extra for control endpoint */ 68 static struct usb_endpoint_instance endpoint_instance[NUM_ENDPOINTS+1]; 69 70 /* 71 * Global flag 72 */ 73 int usbtty_configured_flag = 0; 74 75 /* 76 * Serial number 77 */ 78 static char serial_number[16]; 79 80 81 /* 82 * Descriptors, Strings, Local variables. 83 */ 84 85 /* defined and used by gadget/ep0.c */ 86 extern struct usb_string_descriptor **usb_strings; 87 88 /* Indicies, References */ 89 static unsigned short rx_endpoint = 0; 90 static unsigned short tx_endpoint = 0; 91 static unsigned short interface_count = 0; 92 static struct usb_string_descriptor *usbtty_string_table[STR_COUNT]; 93 94 /* USB Descriptor Strings */ 95 static u8 wstrLang[4] = {4,USB_DT_STRING,0x9,0x4}; 96 static u8 wstrManufacturer[2 + 2*(sizeof(CONFIG_USBD_MANUFACTURER)-1)]; 97 static u8 wstrProduct[2 + 2*(sizeof(CONFIG_USBD_PRODUCT_NAME)-1)]; 98 static u8 wstrSerial[2 + 2*(sizeof(serial_number) - 1)]; 99 static u8 wstrConfiguration[2 + 2*(sizeof(CONFIG_USBD_CONFIGURATION_STR)-1)]; 100 static u8 wstrDataInterface[2 + 2*(sizeof(CONFIG_USBD_DATA_INTERFACE_STR)-1)]; 101 static u8 wstrCtrlInterface[2 + 2*(sizeof(CONFIG_USBD_DATA_INTERFACE_STR)-1)]; 102 103 /* Standard USB Data Structures */ 104 static struct usb_interface_descriptor interface_descriptors[MAX_INTERFACES]; 105 static struct usb_endpoint_descriptor *ep_descriptor_ptrs[NUM_ENDPOINTS]; 106 static struct usb_configuration_descriptor *configuration_descriptor = 0; 107 static struct usb_device_descriptor device_descriptor = { 108 .bLength = sizeof(struct usb_device_descriptor), 109 .bDescriptorType = USB_DT_DEVICE, 110 .bcdUSB = cpu_to_le16(USB_BCD_VERSION), 111 .bDeviceSubClass = 0x00, 112 .bDeviceProtocol = 0x00, 113 .bMaxPacketSize0 = EP0_MAX_PACKET_SIZE, 114 .idVendor = cpu_to_le16(CONFIG_USBD_VENDORID), 115 .bcdDevice = cpu_to_le16(USBTTY_BCD_DEVICE), 116 .iManufacturer = STR_MANUFACTURER, 117 .iProduct = STR_PRODUCT, 118 .iSerialNumber = STR_SERIAL, 119 .bNumConfigurations = NUM_CONFIGS 120 }; 121 122 123 #if defined(CONFIG_USBD_HS) 124 static struct usb_qualifier_descriptor qualifier_descriptor = { 125 .bLength = sizeof(struct usb_qualifier_descriptor), 126 .bDescriptorType = USB_DT_QUAL, 127 .bcdUSB = cpu_to_le16(USB_BCD_VERSION), 128 .bDeviceClass = COMMUNICATIONS_DEVICE_CLASS, 129 .bDeviceSubClass = 0x00, 130 .bDeviceProtocol = 0x00, 131 .bMaxPacketSize0 = EP0_MAX_PACKET_SIZE, 132 .bNumConfigurations = NUM_CONFIGS 133 }; 134 #endif 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(struct stdio_dev *dev) 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(struct stdio_dev *dev) 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(struct stdio_dev *dev, 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(struct stdio_dev *dev, 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 #if defined(CONFIG_USBD_HS) 642 device_instance->qualifier_descriptor = &qualifier_descriptor; 643 #endif 644 device_instance->event = usbtty_event_handler; 645 device_instance->cdc_recv_setup = usbtty_cdc_setup; 646 device_instance->bus = bus_instance; 647 device_instance->configurations = NUM_CONFIGS; 648 device_instance->configuration_instance_array = config_instance; 649 650 /* initialize bus instance */ 651 memset (bus_instance, 0, sizeof (struct usb_bus_instance)); 652 bus_instance->device = device_instance; 653 bus_instance->endpoint_array = endpoint_instance; 654 bus_instance->max_endpoints = 1; 655 bus_instance->maxpacketsize = 64; 656 bus_instance->serial_number_str = serial_number; 657 658 /* configuration instance */ 659 memset (config_instance, 0, 660 sizeof (struct usb_configuration_instance)); 661 config_instance->interfaces = interface_count; 662 config_instance->configuration_descriptor = configuration_descriptor; 663 config_instance->interface_instance_array = interface_instance; 664 665 /* interface instance */ 666 memset (interface_instance, 0, 667 sizeof (struct usb_interface_instance)); 668 interface_instance->alternates = 1; 669 interface_instance->alternates_instance_array = alternate_instance; 670 671 /* alternates instance */ 672 memset (alternate_instance, 0, 673 sizeof (struct usb_alternate_instance)); 674 alternate_instance->interface_descriptor = interface_descriptors; 675 alternate_instance->endpoints = NUM_ENDPOINTS; 676 alternate_instance->endpoints_descriptor_array = ep_descriptor_ptrs; 677 678 /* endpoint instances */ 679 memset (&endpoint_instance[0], 0, 680 sizeof (struct usb_endpoint_instance)); 681 endpoint_instance[0].endpoint_address = 0; 682 endpoint_instance[0].rcv_packetSize = EP0_MAX_PACKET_SIZE; 683 endpoint_instance[0].rcv_attributes = USB_ENDPOINT_XFER_CONTROL; 684 endpoint_instance[0].tx_packetSize = EP0_MAX_PACKET_SIZE; 685 endpoint_instance[0].tx_attributes = USB_ENDPOINT_XFER_CONTROL; 686 udc_setup_ep (device_instance, 0, &endpoint_instance[0]); 687 688 for (i = 1; i <= NUM_ENDPOINTS; i++) { 689 memset (&endpoint_instance[i], 0, 690 sizeof (struct usb_endpoint_instance)); 691 692 endpoint_instance[i].endpoint_address = 693 ep_descriptor_ptrs[i - 1]->bEndpointAddress; 694 695 endpoint_instance[i].rcv_attributes = 696 ep_descriptor_ptrs[i - 1]->bmAttributes; 697 698 endpoint_instance[i].rcv_packetSize = init_wMaxPacketSize(i); 699 700 endpoint_instance[i].tx_attributes = 701 ep_descriptor_ptrs[i - 1]->bmAttributes; 702 703 endpoint_instance[i].tx_packetSize = init_wMaxPacketSize(i); 704 705 endpoint_instance[i].tx_attributes = 706 ep_descriptor_ptrs[i - 1]->bmAttributes; 707 708 urb_link_init (&endpoint_instance[i].rcv); 709 urb_link_init (&endpoint_instance[i].rdy); 710 urb_link_init (&endpoint_instance[i].tx); 711 urb_link_init (&endpoint_instance[i].done); 712 713 if (endpoint_instance[i].endpoint_address & USB_DIR_IN) 714 endpoint_instance[i].tx_urb = 715 usbd_alloc_urb (device_instance, 716 &endpoint_instance[i]); 717 else 718 endpoint_instance[i].rcv_urb = 719 usbd_alloc_urb (device_instance, 720 &endpoint_instance[i]); 721 } 722 } 723 724 static void usbtty_init_endpoints (void) 725 { 726 int i; 727 728 bus_instance->max_endpoints = NUM_ENDPOINTS + 1; 729 for (i = 1; i <= NUM_ENDPOINTS; i++) { 730 udc_setup_ep (device_instance, i, &endpoint_instance[i]); 731 } 732 } 733 734 /* usbtty_init_terminal_type 735 * 736 * Do some late binding for our device type. 737 */ 738 static void usbtty_init_terminal_type(short type) 739 { 740 switch(type){ 741 /* CDC ACM */ 742 case 0: 743 /* Assign endpoint descriptors */ 744 ep_descriptor_ptrs[0] = 745 &acm_configuration_descriptors[0].notification_endpoint; 746 ep_descriptor_ptrs[1] = 747 &acm_configuration_descriptors[0].data_endpoints[0]; 748 ep_descriptor_ptrs[2] = 749 &acm_configuration_descriptors[0].data_endpoints[1]; 750 751 /* Enumerate Device Descriptor */ 752 device_descriptor.bDeviceClass = 753 COMMUNICATIONS_DEVICE_CLASS; 754 device_descriptor.idProduct = 755 cpu_to_le16(CONFIG_USBD_PRODUCTID_CDCACM); 756 757 #if defined(CONFIG_USBD_HS) 758 qualifier_descriptor.bDeviceClass = 759 COMMUNICATIONS_DEVICE_CLASS; 760 #endif 761 /* Assign endpoint indices */ 762 tx_endpoint = ACM_TX_ENDPOINT; 763 rx_endpoint = ACM_RX_ENDPOINT; 764 765 /* Configuration Descriptor */ 766 configuration_descriptor = 767 (struct usb_configuration_descriptor*) 768 &acm_configuration_descriptors; 769 770 /* Interface count */ 771 interface_count = NUM_ACM_INTERFACES; 772 break; 773 774 /* BULK IN/OUT & Default */ 775 case 1: 776 default: 777 /* Assign endpoint descriptors */ 778 ep_descriptor_ptrs[0] = 779 &gserial_configuration_descriptors[0].data_endpoints[0]; 780 ep_descriptor_ptrs[1] = 781 &gserial_configuration_descriptors[0].data_endpoints[1]; 782 ep_descriptor_ptrs[2] = 783 &gserial_configuration_descriptors[0].data_endpoints[2]; 784 785 /* Enumerate Device Descriptor */ 786 device_descriptor.bDeviceClass = 0xFF; 787 device_descriptor.idProduct = 788 cpu_to_le16(CONFIG_USBD_PRODUCTID_GSERIAL); 789 #if defined(CONFIG_USBD_HS) 790 qualifier_descriptor.bDeviceClass = 0xFF; 791 #endif 792 /* Assign endpoint indices */ 793 tx_endpoint = GSERIAL_TX_ENDPOINT; 794 rx_endpoint = GSERIAL_RX_ENDPOINT; 795 796 /* Configuration Descriptor */ 797 configuration_descriptor = 798 (struct usb_configuration_descriptor*) 799 &gserial_configuration_descriptors; 800 801 /* Interface count */ 802 interface_count = NUM_GSERIAL_INTERFACES; 803 break; 804 } 805 } 806 807 /******************************************************************************/ 808 809 static struct urb *next_urb (struct usb_device_instance *device, 810 struct usb_endpoint_instance *endpoint) 811 { 812 struct urb *current_urb = NULL; 813 int space; 814 815 /* If there's a queue, then we should add to the last urb */ 816 if (!endpoint->tx_queue) { 817 current_urb = endpoint->tx_urb; 818 } else { 819 /* Last urb from tx chain */ 820 current_urb = 821 p2surround (struct urb, link, endpoint->tx.prev); 822 } 823 824 /* Make sure this one has enough room */ 825 space = current_urb->buffer_length - current_urb->actual_length; 826 if (space > 0) { 827 return current_urb; 828 } else { /* No space here */ 829 /* First look at done list */ 830 current_urb = first_urb_detached (&endpoint->done); 831 if (!current_urb) { 832 current_urb = usbd_alloc_urb (device, endpoint); 833 } 834 835 urb_append (&endpoint->tx, current_urb); 836 endpoint->tx_queue++; 837 } 838 return current_urb; 839 } 840 841 static int write_buffer (circbuf_t * buf) 842 { 843 if (!usbtty_configured ()) { 844 return 0; 845 } 846 847 struct usb_endpoint_instance *endpoint = 848 &endpoint_instance[tx_endpoint]; 849 struct urb *current_urb = NULL; 850 851 current_urb = next_urb (device_instance, endpoint); 852 /* TX data still exists - send it now 853 */ 854 if(endpoint->sent < current_urb->actual_length){ 855 if(udc_endpoint_write (endpoint)){ 856 /* Write pre-empted by RX */ 857 return -1; 858 } 859 } 860 861 if (buf->size) { 862 char *dest; 863 864 int space_avail; 865 int popnum, popped; 866 int total = 0; 867 868 /* Break buffer into urb sized pieces, 869 * and link each to the endpoint 870 */ 871 while (buf->size > 0) { 872 873 if (!current_urb) { 874 TTYERR ("current_urb is NULL, buf->size %d\n", 875 buf->size); 876 return total; 877 } 878 879 dest = (char*)current_urb->buffer + 880 current_urb->actual_length; 881 882 space_avail = 883 current_urb->buffer_length - 884 current_urb->actual_length; 885 popnum = min(space_avail, (int)buf->size); 886 if (popnum == 0) 887 break; 888 889 popped = buf_pop (buf, dest, popnum); 890 if (popped == 0) 891 break; 892 current_urb->actual_length += popped; 893 total += popped; 894 895 /* If endpoint->last == 0, then transfers have 896 * not started on this endpoint 897 */ 898 if (endpoint->last == 0) { 899 if(udc_endpoint_write (endpoint)){ 900 /* Write pre-empted by RX */ 901 return -1; 902 } 903 } 904 905 }/* end while */ 906 return total; 907 } 908 909 return 0; 910 } 911 912 static int fill_buffer (circbuf_t * buf) 913 { 914 struct usb_endpoint_instance *endpoint = 915 &endpoint_instance[rx_endpoint]; 916 917 if (endpoint->rcv_urb && endpoint->rcv_urb->actual_length) { 918 unsigned int nb = 0; 919 char *src = (char *) endpoint->rcv_urb->buffer; 920 unsigned int rx_avail = buf->totalsize - buf->size; 921 922 if(rx_avail >= endpoint->rcv_urb->actual_length){ 923 924 nb = endpoint->rcv_urb->actual_length; 925 buf_push (buf, src, nb); 926 endpoint->rcv_urb->actual_length = 0; 927 928 } 929 return nb; 930 } 931 return 0; 932 } 933 934 static int usbtty_configured (void) 935 { 936 return usbtty_configured_flag; 937 } 938 939 /******************************************************************************/ 940 941 static void usbtty_event_handler (struct usb_device_instance *device, 942 usb_device_event_t event, int data) 943 { 944 #if defined(CONFIG_USBD_HS) 945 int i; 946 #endif 947 switch (event) { 948 case DEVICE_RESET: 949 case DEVICE_BUS_INACTIVE: 950 usbtty_configured_flag = 0; 951 break; 952 case DEVICE_CONFIGURED: 953 usbtty_configured_flag = 1; 954 break; 955 956 case DEVICE_ADDRESS_ASSIGNED: 957 #if defined(CONFIG_USBD_HS) 958 /* 959 * is_usbd_high_speed routine needs to be defined by 960 * specific gadget driver 961 * It returns true if device enumerates at High speed 962 * Retuns false otherwise 963 */ 964 for (i = 0; i < NUM_ENDPOINTS; i++) { 965 if (((ep_descriptor_ptrs[i]->bmAttributes & 966 USB_ENDPOINT_XFERTYPE_MASK) == 967 USB_ENDPOINT_XFER_BULK) 968 && is_usbd_high_speed()) { 969 970 ep_descriptor_ptrs[i]->wMaxPacketSize = 971 CONFIG_USBD_SERIAL_BULK_HS_PKTSIZE; 972 } 973 974 endpoint_instance[i + 1].tx_packetSize = 975 ep_descriptor_ptrs[i]->wMaxPacketSize; 976 endpoint_instance[i + 1].rcv_packetSize = 977 ep_descriptor_ptrs[i]->wMaxPacketSize; 978 } 979 #endif 980 usbtty_init_endpoints (); 981 982 default: 983 break; 984 } 985 } 986 987 /******************************************************************************/ 988 989 int usbtty_cdc_setup(struct usb_device_request *request, struct urb *urb) 990 { 991 switch (request->bRequest){ 992 993 case ACM_SET_CONTROL_LINE_STATE: /* Implies DTE ready */ 994 break; 995 case ACM_SEND_ENCAPSULATED_COMMAND : /* Required */ 996 break; 997 case ACM_SET_LINE_ENCODING : /* DTE stop/parity bits 998 * per character */ 999 break; 1000 case ACM_GET_ENCAPSULATED_RESPONSE : /* request response */ 1001 break; 1002 case ACM_GET_LINE_ENCODING : /* request DTE rate, 1003 * stop/parity bits */ 1004 memcpy (urb->buffer , &rs232_desc, sizeof(rs232_desc)); 1005 urb->actual_length = sizeof(rs232_desc); 1006 1007 break; 1008 default: 1009 return 1; 1010 } 1011 return 0; 1012 } 1013 1014 /******************************************************************************/ 1015 1016 /* 1017 * Since interrupt handling has not yet been implemented, we use this function 1018 * to handle polling. This is called by the tstc,getc,putc,puts routines to 1019 * update the USB state. 1020 */ 1021 void usbtty_poll (void) 1022 { 1023 /* New interrupts? */ 1024 udc_irq(); 1025 1026 /* Write any output data to host buffer 1027 * (do this before checking interrupts to avoid missing one) 1028 */ 1029 if (usbtty_configured ()) { 1030 write_buffer (&usbtty_output); 1031 } 1032 1033 /* New interrupts? */ 1034 udc_irq(); 1035 1036 /* Check for new data from host.. 1037 * (do this after checking interrupts to get latest data) 1038 */ 1039 if (usbtty_configured ()) { 1040 fill_buffer (&usbtty_input); 1041 } 1042 1043 /* New interrupts? */ 1044 udc_irq(); 1045 1046 } 1047