1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * (C) Copyright 2003 4 * Gerry Hamel, geh@ti.com, Texas Instruments 5 * 6 * (C) Copyright 2006 7 * Bryan O'Donoghue, bodonoghue@codehermit.ie 8 */ 9 10 #include <common.h> 11 #include <config.h> 12 #include <circbuf.h> 13 #include <stdio_dev.h> 14 #include <asm/unaligned.h> 15 #include "usbtty.h" 16 #include "usb_cdc_acm.h" 17 #include "usbdescriptors.h" 18 19 #ifdef DEBUG 20 #define TTYDBG(fmt,args...)\ 21 serial_printf("[%s] %s %d: "fmt, __FILE__,__FUNCTION__,__LINE__,##args) 22 #else 23 #define TTYDBG(fmt,args...) do{}while(0) 24 #endif 25 26 #if 1 27 #define TTYERR(fmt,args...)\ 28 serial_printf("ERROR![%s] %s %d: "fmt, __FILE__,__FUNCTION__,\ 29 __LINE__,##args) 30 #else 31 #define TTYERR(fmt,args...) do{}while(0) 32 #endif 33 34 /* 35 * Defines 36 */ 37 #define NUM_CONFIGS 1 38 #define MAX_INTERFACES 2 39 #define NUM_ENDPOINTS 3 40 #define ACM_TX_ENDPOINT 3 41 #define ACM_RX_ENDPOINT 2 42 #define GSERIAL_TX_ENDPOINT 2 43 #define GSERIAL_RX_ENDPOINT 1 44 #define NUM_ACM_INTERFACES 2 45 #define NUM_GSERIAL_INTERFACES 1 46 #define CONFIG_USBD_DATA_INTERFACE_STR "Bulk Data Interface" 47 #define CONFIG_USBD_CTRL_INTERFACE_STR "Control Interface" 48 49 /* 50 * Buffers to hold input and output data 51 */ 52 #define USBTTY_BUFFER_SIZE 2048 53 static circbuf_t usbtty_input; 54 static circbuf_t usbtty_output; 55 56 57 /* 58 * Instance variables 59 */ 60 static struct stdio_dev usbttydev; 61 static struct usb_device_instance device_instance[1]; 62 static struct usb_bus_instance bus_instance[1]; 63 static struct usb_configuration_instance config_instance[NUM_CONFIGS]; 64 static struct usb_interface_instance interface_instance[MAX_INTERFACES]; 65 static struct usb_alternate_instance alternate_instance[MAX_INTERFACES]; 66 /* one extra for control endpoint */ 67 static struct usb_endpoint_instance endpoint_instance[NUM_ENDPOINTS+1]; 68 69 /* 70 * Global flag 71 */ 72 int usbtty_configured_flag = 0; 73 74 /* 75 * Serial number 76 */ 77 static char serial_number[16]; 78 79 80 /* 81 * Descriptors, Strings, Local variables. 82 */ 83 84 /* defined and used by gadget/ep0.c */ 85 extern struct usb_string_descriptor **usb_strings; 86 87 /* Indicies, References */ 88 static unsigned short rx_endpoint = 0; 89 static unsigned short tx_endpoint = 0; 90 static unsigned short interface_count = 0; 91 static struct usb_string_descriptor *usbtty_string_table[STR_COUNT]; 92 93 /* USB Descriptor Strings */ 94 static u8 wstrLang[4] = {4,USB_DT_STRING,0x9,0x4}; 95 static u8 wstrManufacturer[2 + 2*(sizeof(CONFIG_USBD_MANUFACTURER)-1)]; 96 static u8 wstrProduct[2 + 2*(sizeof(CONFIG_USBD_PRODUCT_NAME)-1)]; 97 static u8 wstrSerial[2 + 2*(sizeof(serial_number) - 1)]; 98 static u8 wstrConfiguration[2 + 2*(sizeof(CONFIG_USBD_CONFIGURATION_STR)-1)]; 99 static u8 wstrDataInterface[2 + 2*(sizeof(CONFIG_USBD_DATA_INTERFACE_STR)-1)]; 100 static u8 wstrCtrlInterface[2 + 2*(sizeof(CONFIG_USBD_DATA_INTERFACE_STR)-1)]; 101 102 /* Standard USB Data Structures */ 103 static struct usb_interface_descriptor interface_descriptors[MAX_INTERFACES]; 104 static struct usb_endpoint_descriptor *ep_descriptor_ptrs[NUM_ENDPOINTS]; 105 static struct usb_configuration_descriptor *configuration_descriptor = 0; 106 static struct usb_device_descriptor device_descriptor = { 107 .bLength = sizeof(struct usb_device_descriptor), 108 .bDescriptorType = USB_DT_DEVICE, 109 .bcdUSB = cpu_to_le16(USB_BCD_VERSION), 110 .bDeviceSubClass = 0x00, 111 .bDeviceProtocol = 0x00, 112 .bMaxPacketSize0 = EP0_MAX_PACKET_SIZE, 113 .idVendor = cpu_to_le16(CONFIG_USBD_VENDORID), 114 .bcdDevice = cpu_to_le16(USBTTY_BCD_DEVICE), 115 .iManufacturer = STR_MANUFACTURER, 116 .iProduct = STR_PRODUCT, 117 .iSerialNumber = STR_SERIAL, 118 .bNumConfigurations = NUM_CONFIGS 119 }; 120 121 122 #if defined(CONFIG_USBD_HS) 123 static struct usb_qualifier_descriptor qualifier_descriptor = { 124 .bLength = sizeof(struct usb_qualifier_descriptor), 125 .bDescriptorType = USB_DT_QUAL, 126 .bcdUSB = cpu_to_le16(USB_BCD_VERSION), 127 .bDeviceClass = COMMUNICATIONS_DEVICE_CLASS, 128 .bDeviceSubClass = 0x00, 129 .bDeviceProtocol = 0x00, 130 .bMaxPacketSize0 = EP0_MAX_PACKET_SIZE, 131 .bNumConfigurations = NUM_CONFIGS 132 }; 133 #endif 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 = UDC_INT_ENDPOINT | 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 = UDC_OUT_ENDPOINT | 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 = UDC_IN_ENDPOINT | 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 = UDC_OUT_ENDPOINT | 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 = UDC_IN_ENDPOINT | 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 = UDC_INT_ENDPOINT | 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(struct stdio_dev *dev) 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(struct stdio_dev *dev) 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(struct stdio_dev *dev, const char c) 432 { 433 if (!usbtty_configured ()) 434 return; 435 436 /* If \n, also do \r */ 437 if (c == '\n') 438 buf_push (&usbtty_output, "\r", 1); 439 440 buf_push(&usbtty_output, &c, 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("\r", 1); 502 __usbtty_puts(str, n + 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 /* Get serial number */ 528 sn = env_get("serial#"); 529 if (!sn) 530 sn = "000000000000"; 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 tt = env_get("usbtty"); 543 if (!tt) 544 tt = "generic"; 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 usbtty_init_endpoints (); 558 559 udc_startup_events (device_instance);/* Enable dev, init udc pointers */ 560 udc_connect (); /* Enable pullup for host detection */ 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 = stdio_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 #define init_wMaxPacketSize(x) le16_to_cpu(get_unaligned(\ 630 &ep_descriptor_ptrs[(x) - 1]->wMaxPacketSize)); 631 632 static void usbtty_init_instances (void) 633 { 634 int i; 635 636 /* initialize device instance */ 637 memset (device_instance, 0, sizeof (struct usb_device_instance)); 638 device_instance->device_state = STATE_INIT; 639 device_instance->device_descriptor = &device_descriptor; 640 #if defined(CONFIG_USBD_HS) 641 device_instance->qualifier_descriptor = &qualifier_descriptor; 642 #endif 643 device_instance->event = usbtty_event_handler; 644 device_instance->cdc_recv_setup = usbtty_cdc_setup; 645 device_instance->bus = bus_instance; 646 device_instance->configurations = NUM_CONFIGS; 647 device_instance->configuration_instance_array = config_instance; 648 649 /* initialize bus instance */ 650 memset (bus_instance, 0, sizeof (struct usb_bus_instance)); 651 bus_instance->device = device_instance; 652 bus_instance->endpoint_array = endpoint_instance; 653 bus_instance->max_endpoints = 1; 654 bus_instance->maxpacketsize = 64; 655 bus_instance->serial_number_str = serial_number; 656 657 /* configuration instance */ 658 memset (config_instance, 0, 659 sizeof (struct usb_configuration_instance)); 660 config_instance->interfaces = interface_count; 661 config_instance->configuration_descriptor = configuration_descriptor; 662 config_instance->interface_instance_array = interface_instance; 663 664 /* interface instance */ 665 memset (interface_instance, 0, 666 sizeof (struct usb_interface_instance)); 667 interface_instance->alternates = 1; 668 interface_instance->alternates_instance_array = alternate_instance; 669 670 /* alternates instance */ 671 memset (alternate_instance, 0, 672 sizeof (struct usb_alternate_instance)); 673 alternate_instance->interface_descriptor = interface_descriptors; 674 alternate_instance->endpoints = NUM_ENDPOINTS; 675 alternate_instance->endpoints_descriptor_array = ep_descriptor_ptrs; 676 677 /* endpoint instances */ 678 memset (&endpoint_instance[0], 0, 679 sizeof (struct usb_endpoint_instance)); 680 endpoint_instance[0].endpoint_address = 0; 681 endpoint_instance[0].rcv_packetSize = EP0_MAX_PACKET_SIZE; 682 endpoint_instance[0].rcv_attributes = USB_ENDPOINT_XFER_CONTROL; 683 endpoint_instance[0].tx_packetSize = EP0_MAX_PACKET_SIZE; 684 endpoint_instance[0].tx_attributes = USB_ENDPOINT_XFER_CONTROL; 685 udc_setup_ep (device_instance, 0, &endpoint_instance[0]); 686 687 for (i = 1; i <= NUM_ENDPOINTS; i++) { 688 memset (&endpoint_instance[i], 0, 689 sizeof (struct usb_endpoint_instance)); 690 691 endpoint_instance[i].endpoint_address = 692 ep_descriptor_ptrs[i - 1]->bEndpointAddress; 693 694 endpoint_instance[i].rcv_attributes = 695 ep_descriptor_ptrs[i - 1]->bmAttributes; 696 697 endpoint_instance[i].rcv_packetSize = init_wMaxPacketSize(i); 698 699 endpoint_instance[i].tx_attributes = 700 ep_descriptor_ptrs[i - 1]->bmAttributes; 701 702 endpoint_instance[i].tx_packetSize = init_wMaxPacketSize(i); 703 704 endpoint_instance[i].tx_attributes = 705 ep_descriptor_ptrs[i - 1]->bmAttributes; 706 707 urb_link_init (&endpoint_instance[i].rcv); 708 urb_link_init (&endpoint_instance[i].rdy); 709 urb_link_init (&endpoint_instance[i].tx); 710 urb_link_init (&endpoint_instance[i].done); 711 712 if (endpoint_instance[i].endpoint_address & USB_DIR_IN) 713 endpoint_instance[i].tx_urb = 714 usbd_alloc_urb (device_instance, 715 &endpoint_instance[i]); 716 else 717 endpoint_instance[i].rcv_urb = 718 usbd_alloc_urb (device_instance, 719 &endpoint_instance[i]); 720 } 721 } 722 723 static void usbtty_init_endpoints (void) 724 { 725 int i; 726 727 bus_instance->max_endpoints = NUM_ENDPOINTS + 1; 728 for (i = 1; i <= NUM_ENDPOINTS; i++) { 729 udc_setup_ep (device_instance, i, &endpoint_instance[i]); 730 } 731 } 732 733 /* usbtty_init_terminal_type 734 * 735 * Do some late binding for our device type. 736 */ 737 static void usbtty_init_terminal_type(short type) 738 { 739 switch(type){ 740 /* CDC ACM */ 741 case 0: 742 /* Assign endpoint descriptors */ 743 ep_descriptor_ptrs[0] = 744 &acm_configuration_descriptors[0].notification_endpoint; 745 ep_descriptor_ptrs[1] = 746 &acm_configuration_descriptors[0].data_endpoints[0]; 747 ep_descriptor_ptrs[2] = 748 &acm_configuration_descriptors[0].data_endpoints[1]; 749 750 /* Enumerate Device Descriptor */ 751 device_descriptor.bDeviceClass = 752 COMMUNICATIONS_DEVICE_CLASS; 753 device_descriptor.idProduct = 754 cpu_to_le16(CONFIG_USBD_PRODUCTID_CDCACM); 755 756 #if defined(CONFIG_USBD_HS) 757 qualifier_descriptor.bDeviceClass = 758 COMMUNICATIONS_DEVICE_CLASS; 759 #endif 760 /* Assign endpoint indices */ 761 tx_endpoint = ACM_TX_ENDPOINT; 762 rx_endpoint = ACM_RX_ENDPOINT; 763 764 /* Configuration Descriptor */ 765 configuration_descriptor = 766 (struct usb_configuration_descriptor*) 767 &acm_configuration_descriptors; 768 769 /* Interface count */ 770 interface_count = NUM_ACM_INTERFACES; 771 break; 772 773 /* BULK IN/OUT & Default */ 774 case 1: 775 default: 776 /* Assign endpoint descriptors */ 777 ep_descriptor_ptrs[0] = 778 &gserial_configuration_descriptors[0].data_endpoints[0]; 779 ep_descriptor_ptrs[1] = 780 &gserial_configuration_descriptors[0].data_endpoints[1]; 781 ep_descriptor_ptrs[2] = 782 &gserial_configuration_descriptors[0].data_endpoints[2]; 783 784 /* Enumerate Device Descriptor */ 785 device_descriptor.bDeviceClass = 0xFF; 786 device_descriptor.idProduct = 787 cpu_to_le16(CONFIG_USBD_PRODUCTID_GSERIAL); 788 #if defined(CONFIG_USBD_HS) 789 qualifier_descriptor.bDeviceClass = 0xFF; 790 #endif 791 /* Assign endpoint indices */ 792 tx_endpoint = GSERIAL_TX_ENDPOINT; 793 rx_endpoint = GSERIAL_RX_ENDPOINT; 794 795 /* Configuration Descriptor */ 796 configuration_descriptor = 797 (struct usb_configuration_descriptor*) 798 &gserial_configuration_descriptors; 799 800 /* Interface count */ 801 interface_count = NUM_GSERIAL_INTERFACES; 802 break; 803 } 804 } 805 806 /******************************************************************************/ 807 808 static struct urb *next_urb (struct usb_device_instance *device, 809 struct usb_endpoint_instance *endpoint) 810 { 811 struct urb *current_urb = NULL; 812 int space; 813 814 /* If there's a queue, then we should add to the last urb */ 815 if (!endpoint->tx_queue) { 816 current_urb = endpoint->tx_urb; 817 } else { 818 /* Last urb from tx chain */ 819 current_urb = 820 p2surround (struct urb, link, endpoint->tx.prev); 821 } 822 823 /* Make sure this one has enough room */ 824 space = current_urb->buffer_length - current_urb->actual_length; 825 if (space > 0) { 826 return current_urb; 827 } else { /* No space here */ 828 /* First look at done list */ 829 current_urb = first_urb_detached (&endpoint->done); 830 if (!current_urb) { 831 current_urb = usbd_alloc_urb (device, endpoint); 832 } 833 834 urb_append (&endpoint->tx, current_urb); 835 endpoint->tx_queue++; 836 } 837 return current_urb; 838 } 839 840 static int write_buffer (circbuf_t * buf) 841 { 842 if (!usbtty_configured ()) { 843 return 0; 844 } 845 846 struct usb_endpoint_instance *endpoint = 847 &endpoint_instance[tx_endpoint]; 848 struct urb *current_urb = NULL; 849 850 current_urb = next_urb (device_instance, endpoint); 851 852 if (!current_urb) { 853 TTYERR ("current_urb is NULL, buf->size %d\n", 854 buf->size); 855 return 0; 856 } 857 858 /* TX data still exists - send it now 859 */ 860 if(endpoint->sent < current_urb->actual_length){ 861 if(udc_endpoint_write (endpoint)){ 862 /* Write pre-empted by RX */ 863 return -1; 864 } 865 } 866 867 if (buf->size) { 868 char *dest; 869 870 int space_avail; 871 int popnum, popped; 872 int total = 0; 873 874 /* Break buffer into urb sized pieces, 875 * and link each to the endpoint 876 */ 877 while (buf->size > 0) { 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