1 /* 2 * Ben NanoNote and Arduino USB Host shield communication. 3 * 4 * Copyright 2013 Paul Boddie 5 * 6 * SPI functions derived from those in lib/atben.c by Werner Almesberger: 7 * 8 * Copyright 2010-2011 Werner Almesberger 9 * 10 * This program is free software; you can redistribute it and/or modify 11 * it under the terms of the GNU General Public License as published by 12 * the Free Software Foundation; either version 2 of the License, or 13 * (at your option) any later version. 14 */ 15 16 #include <ubb/ubb.h> 17 #include <stdio.h> 18 #include <signal.h> 19 #include <stdlib.h> 20 #include <usb.h> 21 #include <unistd.h> 22 #include <string.h> 23 #include <endian.h> 24 25 /* Found in Python's asdl.h. */ 26 27 #ifndef __cplusplus 28 typedef enum {false, true} bool; 29 #endif 30 31 /* Initialisation states. */ 32 33 typedef enum 34 { 35 MAX_DEVSTATE_INIT = 0, 36 MAX_DEVSTATE_CONNECTED, 37 MAX_DEVSTATE_START, 38 MAX_DEVSTATE_RESET, 39 MAX_DEVSTATE_INSPECTED, 40 MAX_DEVSTATE_RESET_AGAIN, 41 MAX_DEVSTATE_ADDRESSING, 42 MAX_DEVSTATE_READY 43 } max_devstate; 44 45 /* Device details. */ 46 47 typedef struct 48 { 49 bool in_toggle, out_toggle; 50 struct usb_device_descriptor desc; 51 uint8_t address, max_packet_size; 52 } max_device; 53 54 static uint16_t next_address = 1; 55 56 /* Pin assignments: 57 * 58 * Sniffer UBB Shield 59 * ------- ---- ------ 60 * DAT2 DAT2 9 (INT) 61 * CD DAT3 10 (SS) 62 * CMD CMD 7 (RESET) 63 * VCC VDD VIN 64 * CLK CLK 13 (SCLK) 65 * GND GND GND 66 * DAT0 DAT0 11 (MOSI) 67 * DAT1 DAT1 12 (MISO) 68 * 8 (GPX) (not assigned) 69 */ 70 71 #define MAX_RESET UBB_CMD 72 #define MAX_SCLK UBB_CLK 73 #define MAX_MOSI UBB_DAT0 74 #define MAX_MISO UBB_DAT1 75 #define MAX_INT UBB_DAT2 76 #define MAX_SS UBB_DAT3 77 78 /* MAX3421E definitions. */ 79 80 #define MAX_REG_READ 0x00 81 #define MAX_REG_WRITE 0x02 82 83 #define MAX_REG_RCVFIFO 1 84 #define MAX_REG_SNDFIFO 2 85 #define MAX_REG_SUDFIFO 4 86 #define MAX_REG_RCVBC 6 87 #define MAX_REG_SNDBC 7 88 #define MAX_REG_USBIRQ 13 89 #define MAX_REG_USBIEN 14 90 #define MAX_REG_USBCTL 15 91 #define MAX_REG_CPUCTL 16 92 #define MAX_REG_PINCTL 17 93 #define MAX_REG_REVISION 18 94 #define MAX_REG_HIRQ 25 95 #define MAX_REG_HIEN 26 96 #define MAX_REG_MODE 27 97 #define MAX_REG_PERADDR 28 98 #define MAX_REG_HCTL 29 99 #define MAX_REG_HXFR 30 100 #define MAX_REG_HRSL 31 101 102 #define MAX_USBIRQ_OSCOKIRQ 1 103 #define MAX_USBIRQ_NOVBUSIRQ 32 104 #define MAX_USBIRQ_VBUSIRQ 64 105 106 #define MAX_USBCTL_PWRDOWN 16 107 #define MAX_USBCTL_CHIPRES 32 108 109 #define MAX_CPUCTL_IE 1 110 111 #define MAX_PINCTL_POSINT_LOW 0 112 #define MAX_PINCTL_POSINT_HIGH 4 113 #define MAX_PINCTL_INTLEVEL_EDGE 0 114 #define MAX_PINCTL_INTLEVEL_LEVEL 8 115 #define MAX_PINCTL_FDUPSPI_HALF 0 116 #define MAX_PINCTL_FDUPSPI_FULL 16 117 118 #define MAX_HIRQ_BUSEVENTIRQ 1 119 #define MAX_HIRQ_RWUIRQ 2 120 #define MAX_HIRQ_RCVDAVIRQ 4 121 #define MAX_HIRQ_SNDBAVIRQ 8 122 #define MAX_HIRQ_SUSDNIRQ 16 123 #define MAX_HIRQ_CONDETIRQ 32 124 #define MAX_HIRQ_FRAMEIRQ 64 125 #define MAX_HIRQ_HXFRDNIRQ 128 126 127 #define MAX_HIEN_BUSEVENTIE 1 128 #define MAX_HIEN_CONDETIE 32 129 #define MAX_HIEN_FRAMEIE 64 130 131 #define MAX_MODE_PERIPHERAL 0 132 #define MAX_MODE_HOST 1 133 #define MAX_MODE_LOWSPEED 2 134 #define MAX_MODE_SOFKAENAB 8 135 #define MAX_MODE_SEPIRQ_OFF 0 136 #define MAX_MODE_SEPIRQ_ON 16 137 #define MAX_MODE_DMPULLDN 64 138 #define MAX_MODE_DPPULLDN 128 139 140 #define MAX_MODE_HOST_ENABLED (MAX_MODE_HOST | MAX_MODE_SEPIRQ_OFF | MAX_MODE_DMPULLDN | MAX_MODE_DPPULLDN) 141 #define MAX_MODE_HOST_ACTIVE (MAX_MODE_HOST_ENABLED | MAX_MODE_SOFKAENAB) 142 #define MAX_MODE_HOST_FULLSPEED MAX_MODE_HOST_ACTIVE 143 #define MAX_MODE_HOST_LOWSPEED (MAX_MODE_HOST_ACTIVE | MAX_MODE_LOWSPEED) 144 145 #define MAX_HCTL_BUSRST 1 146 #define MAX_HCTL_SAMPLEBUS 4 147 #define MAX_HCTL_RCVTOG0 16 148 #define MAX_HCTL_RCVTOG1 32 149 #define MAX_HCTL_SNDTOG0 64 150 #define MAX_HCTL_SNDTOG1 128 151 152 #define MAX_HXFR_SETUP 16 153 #define MAX_HXFR_OUTNIN 32 154 #define MAX_HXFR_HS 128 155 156 #define MAX_HRSL_JSTATUS 128 157 #define MAX_HRSL_KSTATUS 64 158 #define MAX_HRSL_SNDTOGRD 32 159 #define MAX_HRSL_RCVTOGRD 16 160 #define MAX_HRSL_HRSLT 15 161 162 #define max_reg(n) ((uint8_t) (n << 3)) 163 #define max_reg_read(n) (max_reg(n) | MAX_REG_READ) 164 #define max_reg_write(n) (max_reg(n) | MAX_REG_WRITE) 165 166 #define usb_descriptor_type(n) ((uint16_t) (n << 8)) 167 168 void spi_begin() 169 { 170 CLR(MAX_SS); 171 } 172 173 void spi_end() 174 { 175 SET(MAX_SS); 176 } 177 178 /** 179 * Send the given value via MOSI while receiving a value via MISO. 180 * This requires full-duplex SPI and will produce a status value for the first 181 * value sent (the command). 182 */ 183 uint8_t spi_sendrecv(uint8_t v) 184 { 185 uint8_t result = 0; 186 uint8_t mask; 187 188 for (mask = 0x80; mask; mask >>= 1) 189 { 190 if (v & mask) 191 { 192 #ifdef DEBUG 193 printf("1"); 194 #endif 195 SET(MAX_MOSI); 196 } 197 else 198 { 199 #ifdef DEBUG 200 printf("0"); 201 #endif 202 CLR(MAX_MOSI); 203 } 204 205 /* Wait for stable output signal. */ 206 207 SET(MAX_SCLK); 208 209 if (PIN(MAX_MISO)) 210 result |= mask; 211 212 CLR(MAX_SCLK); 213 } 214 215 #ifdef DEBUG 216 printf("\n"); 217 #endif 218 return result; 219 } 220 221 uint8_t max_read(uint8_t reg, uint8_t *status) 222 { 223 uint8_t result = 0, tmpstatus = 0; 224 225 tmpstatus = 0; 226 227 spi_begin(); 228 tmpstatus = spi_sendrecv(max_reg_read(reg)); 229 result = spi_sendrecv(0); 230 spi_end(); 231 232 if (status != NULL) 233 *status = tmpstatus; 234 235 return result; 236 } 237 238 uint8_t max_write(uint8_t reg, uint8_t value) 239 { 240 uint8_t status = 0; 241 242 spi_begin(); 243 status = spi_sendrecv(max_reg_write(reg)); 244 spi_sendrecv(value); 245 spi_end(); 246 247 return status; 248 } 249 250 /** 251 * Return whether data can be sent. 252 */ 253 bool max_can_send(uint8_t *status) 254 { 255 if (status == NULL) 256 return max_read(MAX_REG_HIRQ, NULL) & MAX_HIRQ_SNDBAVIRQ; 257 else 258 return *status & MAX_HIRQ_SNDBAVIRQ; 259 } 260 261 /** 262 * Set the sending data toggle. 263 */ 264 void max_set_send_toggle(bool toggle) 265 { 266 max_write(MAX_REG_HCTL, toggle ? MAX_HCTL_SNDTOG1 : MAX_HCTL_SNDTOG0); 267 } 268 269 /** 270 * Return the sending data toggle. 271 */ 272 bool max_get_send_toggle() 273 { 274 return (max_read(MAX_REG_HRSL, NULL) & MAX_HRSL_SNDTOGRD) != 0; 275 } 276 277 /** 278 * Set the receiving data toggle. 279 */ 280 void max_set_recv_toggle(bool toggle) 281 { 282 max_write(MAX_REG_HCTL, toggle ? MAX_HCTL_RCVTOG1 : MAX_HCTL_RCVTOG0); 283 } 284 285 /** 286 * Return the receiving data toggle. 287 */ 288 bool max_get_recv_toggle() 289 { 290 return (max_read(MAX_REG_HRSL, NULL) & MAX_HRSL_RCVTOGRD) != 0; 291 } 292 293 /** 294 * Wait for handshake/timeout after a transfer. 295 */ 296 uint8_t max_wait_transfer(uint8_t status) 297 { 298 while (!(status & MAX_HIRQ_HXFRDNIRQ)) 299 { 300 status = max_read(MAX_REG_HIRQ, NULL); 301 } 302 303 max_write(MAX_REG_HIRQ, MAX_HIRQ_HXFRDNIRQ); 304 return max_read(MAX_REG_HIRQ, NULL); 305 } 306 307 /** 308 * Write the given data to the FIFO. 309 */ 310 void max_write_fifo(uint8_t endpoint, uint8_t *data, uint8_t len) 311 { 312 uint8_t count; 313 314 for (count = 0; count < len; count++) 315 { 316 max_write(endpoint ? MAX_REG_SNDFIFO : MAX_REG_SUDFIFO, data[count]); 317 } 318 319 if (endpoint) 320 max_write(MAX_REG_SNDBC, len); 321 } 322 323 /** 324 * Read the data from the FIFO. 325 */ 326 void max_read_fifo(uint8_t **data, uint8_t *len, uint8_t *datalimit) 327 { 328 uint8_t count, received = max_read(MAX_REG_RCVBC, NULL); 329 printf("Received %d bytes.\n", received); 330 331 *len += received; 332 333 for (count = 0; (count < received) && (*data < datalimit); count++) 334 { 335 *((*data)++) = max_read(MAX_REG_RCVFIFO, NULL); 336 } 337 } 338 339 /** 340 * Send a request to the given endpoint, using the supplied data payload with 341 * the given length, indicating the preserved toggle state of the endpoint 342 * (which will be updated). 343 */ 344 uint8_t max_send(uint8_t endpoint, uint8_t *data, uint8_t len, bool *toggle) 345 { 346 uint8_t status, hrsl = 0; 347 348 max_write_fifo(endpoint, data, len); 349 350 max_set_send_toggle(*toggle); 351 352 /* Initiate the transfer. */ 353 354 do 355 { 356 status = max_write(MAX_REG_HXFR, endpoint | MAX_HXFR_OUTNIN); 357 status = max_wait_transfer(status); 358 359 /* Test for usable data. */ 360 361 if (status & MAX_HIRQ_SNDBAVIRQ) 362 { 363 hrsl = max_read(MAX_REG_HRSL, &status); 364 365 if (!(hrsl & MAX_HRSL_HRSLT)) 366 break; 367 } 368 } 369 while (true); 370 371 *toggle = max_get_send_toggle(); 372 373 return status; 374 } 375 376 /** 377 * Make a request for data from the given endpoint, collecting it in the 378 * supplied buffer with the given length, indicating the preserved toggle state 379 * of the endpoint (which will be updated). The length will be updated to 380 * indicate the total length of the received data. 381 */ 382 bool max_recv(uint8_t endpoint, uint8_t *data, uint8_t *len, bool *toggle) 383 { 384 uint8_t *datalimit = data + *len; 385 uint8_t status, hrsl = 0; 386 uint16_t attempt = 1024; 387 388 max_set_recv_toggle(*toggle); 389 390 /* Initiate the transfer. */ 391 392 do 393 { 394 status = max_write(MAX_REG_HXFR, endpoint); 395 status = max_wait_transfer(status); 396 397 /* Test for usable data. */ 398 399 hrsl = max_read(MAX_REG_HRSL, &status); 400 401 attempt--; 402 } 403 while ((hrsl & MAX_HRSL_HRSLT) && attempt); 404 405 if (!attempt) 406 { 407 printf("HRSL is %x\n", hrsl); 408 return false; 409 } 410 411 while (status & MAX_HIRQ_RCVDAVIRQ) 412 { 413 max_read_fifo(&data, len, datalimit); 414 415 /* Indicate that all data has been read. */ 416 417 max_write(MAX_REG_HIRQ, MAX_HIRQ_RCVDAVIRQ); 418 status = max_read(MAX_REG_HIRQ, NULL); 419 } 420 421 *toggle = max_get_recv_toggle(); 422 423 return true; 424 } 425 426 /** 427 * Send a control request consisting of the given setup data. 428 */ 429 uint8_t max_control(uint8_t *setup) 430 { 431 uint8_t status, hrsl; 432 433 max_write_fifo(0, setup, 8); 434 435 /* Initiate the transfer. */ 436 437 do 438 { 439 status = max_write(MAX_REG_HXFR, MAX_HXFR_SETUP); 440 status = max_wait_transfer(status); 441 hrsl = max_read(MAX_REG_HRSL, &status); 442 } 443 while (hrsl & MAX_HRSL_HRSLT); 444 445 return status; 446 } 447 448 bool max_control_input(uint8_t *data, uint8_t *len, max_device *device) 449 { 450 device->in_toggle = true; 451 return max_recv(0, data, len, &device->in_toggle); 452 } 453 454 /** 455 * Perform a status transaction as part of a larger control transaction. 456 * The out parameter is used to indicate the kind of status transfer to be 457 * performed and should be the inverse of the control transfer direction. 458 */ 459 uint8_t max_control_status(bool out) 460 { 461 uint8_t status, hrsl; 462 463 do 464 { 465 status = max_write(MAX_REG_HXFR, MAX_HXFR_HS | (out ? MAX_HXFR_OUTNIN : 0)); 466 status = max_wait_transfer(status); 467 hrsl = max_read(MAX_REG_HRSL, &status); 468 } 469 while (hrsl & MAX_HRSL_HRSLT); 470 471 return status; 472 } 473 474 void chipreset() 475 { 476 printf("Resetting...\n"); 477 max_write(MAX_REG_USBCTL, MAX_USBCTL_CHIPRES); 478 479 printf("Clearing the reset...\n"); 480 max_write(MAX_REG_USBCTL, 0); 481 } 482 483 uint8_t check() 484 { 485 uint8_t oscillator; 486 487 oscillator = max_read(MAX_REG_USBIRQ, NULL); 488 489 return (oscillator & ~(MAX_USBIRQ_NOVBUSIRQ | MAX_USBIRQ_VBUSIRQ)) == MAX_USBIRQ_OSCOKIRQ; 490 } 491 492 uint8_t wait() 493 { 494 uint16_t timeout = 1024; 495 496 /* Wait for the oscillator before performing USB activity. */ 497 498 printf("Waiting...\n"); 499 500 while ((timeout > 0) && (!check())) 501 { 502 timeout--; 503 } 504 505 printf("Iterations remaining: %d\n", timeout); 506 507 return timeout; 508 } 509 510 /** 511 * Return whether the bus is ready to be sampled. The application note claims 512 * that the SAMPLEBUS bit is cleared, but this does not seem to be the case. 513 */ 514 uint8_t samplebusready() 515 { 516 uint8_t result; 517 518 result = max_read(MAX_REG_HCTL, NULL); 519 return result & MAX_HCTL_SAMPLEBUS; 520 } 521 522 void samplebus() 523 { 524 max_write(MAX_REG_HCTL, MAX_HCTL_SAMPLEBUS); 525 while (!samplebusready()); 526 } 527 528 /** 529 * Handle the connection or disconnection of a device, returning true if the 530 * device is now connected or false otherwise. If the device is connected, a 531 * bus reset is performed. 532 */ 533 bool devicechanged() 534 { 535 uint8_t hrsl, mode; 536 537 hrsl = max_read(MAX_REG_HRSL, NULL); 538 mode = max_read(MAX_REG_MODE, NULL); 539 540 if ((hrsl & MAX_HRSL_JSTATUS) && (hrsl & MAX_HRSL_KSTATUS)) 541 { 542 printf("Bad device status.\n"); 543 } 544 else if (!(hrsl & MAX_HRSL_JSTATUS) && !(hrsl & MAX_HRSL_KSTATUS)) 545 { 546 printf("Device disconnected.\n"); 547 max_write(MAX_REG_MODE, MAX_MODE_HOST_ENABLED); 548 } 549 else 550 { 551 printf("Device connected.\n"); 552 553 /* Low speed device when J and lowspeed have the same level. 554 Since J and K should have opposing levels, K can be tested when 555 lowspeed is low. */ 556 557 if (((hrsl & MAX_HRSL_JSTATUS) && (mode & MAX_MODE_LOWSPEED)) || 558 ((hrsl & MAX_HRSL_KSTATUS) && !(mode & MAX_MODE_LOWSPEED))) 559 { 560 printf("Device is low speed.\n"); 561 if (max_read(MAX_REG_MODE, NULL) != MAX_MODE_HOST_LOWSPEED) 562 max_write(MAX_REG_MODE, MAX_MODE_HOST_LOWSPEED); 563 } 564 else 565 { 566 printf("Device is full speed.\n"); 567 if (max_read(MAX_REG_MODE, NULL) != MAX_MODE_HOST_FULLSPEED) 568 max_write(MAX_REG_MODE, MAX_MODE_HOST_FULLSPEED); 569 } 570 571 return true; 572 } 573 574 return false; 575 } 576 577 /** 578 * Initialise a USB control request setup payload. 579 */ 580 void setup_packet(uint8_t *setup, uint8_t request_type, uint8_t request, uint16_t value, uint16_t index, uint16_t length) 581 { 582 setup[0] = request_type; 583 setup[1] = request; 584 setup[2] = value & 0xff; 585 setup[3] = value >> 8; 586 setup[4] = index & 0xff; 587 setup[5] = index >> 8; 588 setup[6] = length & 0xff; 589 setup[7] = length >> 8; 590 } 591 592 uint8_t usb_descriptor_size(uint8_t type) 593 { 594 switch (type) 595 { 596 case USB_DT_DEVICE: return USB_DT_DEVICE_SIZE; 597 case USB_DT_CONFIG: return USB_DT_CONFIG_SIZE; 598 case USB_DT_STRING: return sizeof(struct usb_string_descriptor); 599 case USB_DT_INTERFACE: return USB_DT_INTERFACE_SIZE; 600 case USB_DT_ENDPOINT: return USB_DT_ENDPOINT_SIZE; 601 default: return 0; 602 } 603 } 604 605 /** 606 * Get a descriptor from the device having the given type, value and index. 607 * The descriptor buffer is static and must be copied if it is to be preserved. 608 */ 609 uint8_t *max_get_descriptor(max_device *device, uint8_t type, uint8_t value, uint8_t index, bool initial) 610 { 611 static uint8_t data[64]; 612 uint8_t len = 64, setup[8]; 613 614 printf("Sending descriptor request to address %d, endpoint 0...\n", device->address); 615 616 max_write(MAX_REG_PERADDR, device->address); 617 618 setup_packet(setup, USB_ENDPOINT_IN, USB_REQ_GET_DESCRIPTOR, usb_descriptor_type(type) | value, index, 619 initial ? 8 : 64); 620 621 max_control(setup); 622 if (!max_control_input(data, &len, device)) 623 { 624 printf("Failed.\n"); 625 return NULL; 626 } 627 max_control_status(true); 628 629 if (len >= usb_descriptor_size(type)) 630 return data; 631 else 632 { 633 printf("Expected %d but received %d.\n", usb_descriptor_size(type), len); 634 return NULL; 635 } 636 } 637 638 /** 639 * Perform initialisation on a device, obtaining the device details and storing 640 * this information in the device structure, returning true if successful and 641 * false otherwise. 642 */ 643 bool max_init_device(max_device *device) 644 { 645 struct usb_device_descriptor *desc; 646 647 printf("Sending control request to address 0, endpoint 0...\n"); 648 649 device->address = 0; 650 651 /* Send a "get descriptor" request for the device descriptor. */ 652 653 desc = (struct usb_device_descriptor *) max_get_descriptor(device, USB_DT_DEVICE, 0, 0, true); 654 655 if (desc != NULL) 656 { 657 device->max_packet_size = device->desc.bMaxPacketSize0; 658 659 /* Reset the device. */ 660 661 max_write(MAX_REG_HCTL, MAX_HCTL_BUSRST); 662 return true; 663 } 664 665 return false; 666 } 667 668 bool max_complete_device(max_device *device) 669 { 670 struct usb_device_descriptor *desc; 671 672 printf("Sending control request to address 0, endpoint 0...\n"); 673 674 device->address = 0; 675 676 /* Send a "get descriptor" request for the device descriptor. */ 677 678 desc = (struct usb_device_descriptor *) max_get_descriptor(device, USB_DT_DEVICE, 0, 0, false); 679 680 if (desc != NULL) 681 { 682 memcpy(&device->desc, desc, sizeof(struct usb_device_descriptor)); 683 device->desc.bcdUSB = le16toh(device->desc.bcdUSB); 684 device->desc.idVendor = le16toh(device->desc.idVendor); 685 device->desc.idProduct = le16toh(device->desc.idProduct); 686 device->desc.bcdDevice = le16toh(device->desc.bcdDevice); 687 688 printf("bLength: %d\n", device->desc.bLength); 689 printf("bDescriptorType: %d\n", device->desc.bDescriptorType); 690 printf("bcdUSB: %04x\n", device->desc.bcdUSB); 691 printf("bDeviceClass: %d\n", device->desc.bDeviceClass); 692 printf("bDeviceSubClass: %d\n", device->desc.bDeviceSubClass); 693 printf("bDeviceProtocol: %d\n", device->desc.bDeviceProtocol); 694 printf("bMaxPacketSize0: %d\n", device->desc.bMaxPacketSize0); 695 printf("idVendor: %04x\n", device->desc.idVendor); 696 printf("idProduct: %04x\n", device->desc.idProduct); 697 printf("bcdDevice: %04x\n", device->desc.bcdDevice); 698 printf("iManufacturer: %d\n", device->desc.iManufacturer); 699 printf("iProduct: %d\n", device->desc.iProduct); 700 printf("iSerialNumber: %d\n", device->desc.iSerialNumber); 701 printf("bNumConfigurations: %d\n", device->desc.bNumConfigurations); 702 703 return true; 704 } 705 706 return false; 707 } 708 709 /** 710 * Assign a new address to the given device. 711 */ 712 void max_set_address(max_device *device) 713 { 714 uint8_t setup[8]; 715 716 max_write(MAX_REG_PERADDR, 0); 717 718 device->address = next_address++; 719 720 printf("Setting device address to %d...\n", device->address); 721 722 setup_packet(setup, USB_ENDPOINT_OUT, USB_REQ_SET_ADDRESS, device->address, 0, 0); 723 max_control(setup); 724 max_control_status(false); 725 } 726 727 void usb_show_languages(uint8_t *data) 728 { 729 struct usb_string_descriptor *desc = (struct usb_string_descriptor *) data; 730 uint16_t *lang; 731 732 if (data == NULL) 733 return; 734 735 printf("bLength: %d\n", desc->bLength); 736 printf("bDescriptorType: %d\n", desc->bDescriptorType); 737 738 for (lang = desc->wData; lang < (uint16_t *) (data + desc->bLength); lang++) 739 { 740 printf("wLangId: %04x\n", le16toh(*lang)); 741 } 742 } 743 744 void usb_show_configuration(uint8_t *data) 745 { 746 struct usb_config_descriptor *conf = (struct usb_config_descriptor *) data; 747 uint8_t *current, *last, total = le16toh(conf->wTotalLength); 748 struct usb_descriptor_header *desc; 749 struct usb_interface_descriptor *intf; 750 struct usb_endpoint_descriptor *endp; 751 752 if (data == NULL) 753 return; 754 755 printf("bLength: %d\n", conf->bLength); 756 printf("bDescriptorType: %d\n", conf->bDescriptorType); 757 printf("wTotalLength: %d\n", total); 758 printf("bNumInterfaces: %d\n", conf->bNumInterfaces); 759 printf("bConfigurationValue: %d\n", conf->bConfigurationValue); 760 printf("iConfiguration: %d\n", conf->iConfiguration); 761 printf("bmAttributes: %x\n", conf->bmAttributes); 762 printf("MaxPower: %d\n", conf->MaxPower); 763 764 current = ((uint8_t *) conf) + conf->bLength; 765 last = ((uint8_t *) conf) + total; 766 767 while (current < last) 768 { 769 desc = (struct usb_descriptor_header *) current; 770 printf("bLength: %d\n", desc->bLength); 771 printf("bDescriptorType: %d\n", desc->bDescriptorType); 772 773 switch (desc->bDescriptorType) 774 { 775 case USB_DT_INTERFACE: 776 intf = (struct usb_interface_descriptor *) current; 777 printf("bInterfaceNumber: %d\n", intf->bInterfaceNumber); 778 printf("bAlternateSetting: %d\n", intf->bAlternateSetting); 779 printf("bNumEndpoints: %d\n", intf->bNumEndpoints); 780 printf("bInterfaceClass: %x\n", intf->bInterfaceClass); 781 printf("bInterfaceSubClass: %x\n", intf->bInterfaceSubClass); 782 printf("bInterfaceProtocol: %x\n", intf->bInterfaceProtocol); 783 printf("iInterface: %d\n", intf->iInterface); 784 break; 785 786 case USB_DT_ENDPOINT: 787 endp = (struct usb_endpoint_descriptor *) current; 788 printf("bEndpointAddress: %d\n", endp->bEndpointAddress); 789 printf("bmAttributes: %x\n", endp->bmAttributes); 790 printf("wMaxPacketSize: %d\n", le16toh(endp->wMaxPacketSize)); 791 printf("bInterval: %d\n", endp->bInterval); 792 break; 793 794 default: 795 break; 796 } 797 798 if (desc->bLength) 799 current += desc->bLength; 800 else 801 { 802 printf("END (zero length record)\n"); 803 break; 804 } 805 } 806 } 807 808 /** 809 * Handle termination of the process. 810 */ 811 void shutdown(int signum) 812 { 813 printf("Closing...\n"); 814 ubb_close(0); 815 exit(1); 816 } 817 818 int main(int argc, char *argv[]) 819 { 820 uint8_t status = 0, revision = 0, framecount; 821 uint16_t count; 822 bool bus_event, data_event, suspended_event, connection_event, frame_event; 823 max_device device; 824 max_devstate devstate = MAX_DEVSTATE_INIT; 825 826 device.in_toggle = false; 827 device.out_toggle = false; 828 device.max_packet_size = 8; 829 830 signal(SIGINT, &shutdown); 831 832 if (ubb_open(0) < 0) { 833 perror("ubb_open"); 834 return 1; 835 } 836 837 ubb_power(1); 838 printf("Power on.\n"); 839 840 OUT(MAX_SS); 841 OUT(MAX_MOSI); 842 OUT(MAX_SCLK); 843 OUT(MAX_RESET); 844 IN(MAX_INT); 845 IN(MAX_MISO); 846 847 /* Initialise SPI. */ 848 /* Set SS# to 1. */ 849 850 SET(MAX_SS); 851 CLR(MAX_MOSI); 852 CLR(MAX_SCLK); 853 SET(MAX_RESET); 854 855 /* Initialise the MAX3421E. */ 856 857 /* Set full-duplex, interrupt signalling. */ 858 859 printf("Setting pin control...\n"); 860 max_write(MAX_REG_PINCTL, MAX_PINCTL_INTLEVEL_LEVEL | MAX_PINCTL_FDUPSPI_FULL); 861 862 chipreset(); 863 printf("Ready? %d\n", wait()); 864 865 /* Check various registers. */ 866 867 printf("Mode: %x\n", max_read(MAX_REG_MODE, &status)); 868 printf("IRQ: %x\n", max_read(MAX_REG_HIRQ, &status)); 869 870 /* Set host mode. */ 871 872 printf("Setting mode...\n"); 873 status = max_write(MAX_REG_MODE, MAX_MODE_HOST_ENABLED); 874 875 printf("Setting INT signalling...\n"); 876 status = max_write(MAX_REG_CPUCTL, MAX_CPUCTL_IE); 877 878 printf("Setting event signalling...\n"); 879 status = max_write(MAX_REG_HIEN, MAX_HIEN_CONDETIE | MAX_HIEN_FRAMEIE | MAX_HIEN_BUSEVENTIE); 880 881 /* Check various registers. */ 882 883 printf("Mode: %x\n", max_read(MAX_REG_MODE, &status)); 884 printf("IRQ: %x\n", max_read(MAX_REG_HIRQ, &status)); 885 printf("IE: %x\n", max_read(MAX_REG_HIEN, &status)); 886 printf("CPU: %x\n", max_read(MAX_REG_CPUCTL, &status)); 887 printf("Pin: %x\n", max_read(MAX_REG_PINCTL, &status)); 888 printf("USBIRQ: %x\n", max_read(MAX_REG_USBIRQ, &status)); 889 printf("USBIE: %x\n", max_read(MAX_REG_USBIEN, &status)); 890 891 /* Read from the REVISION register. */ 892 893 printf("Reading...\n"); 894 revision = max_read(MAX_REG_REVISION, &status); 895 printf("Revision = %x\n", revision); 896 897 /* Sample the bus for any devices that are already connected. */ 898 899 samplebus(); 900 901 if (devicechanged()) 902 { 903 devstate = MAX_DEVSTATE_CONNECTED; 904 framecount = 200; 905 } 906 907 /* Enter the main processing loop. */ 908 909 for (count = 0; count <= 65535; count++) 910 { 911 if (!PIN(MAX_INT)) 912 { 913 /* Obtain interrupt conditions. */ 914 915 status = max_read(MAX_REG_HIRQ, NULL); 916 917 bus_event = status & MAX_HIRQ_BUSEVENTIRQ; 918 data_event = status & MAX_HIRQ_RCVDAVIRQ; 919 suspended_event = status & MAX_HIRQ_SUSDNIRQ; 920 connection_event = status & MAX_HIRQ_CONDETIRQ; 921 frame_event = status & MAX_HIRQ_FRAMEIRQ; 922 923 #ifdef DEBUG_EVENTS 924 if (bus_event) printf("Bus "); 925 if (data_event) printf("Data "); 926 if (suspended_event) printf("Suspended "); 927 if (connection_event) printf("Connection "); 928 if (frame_event) printf("Frame "); 929 printf("\n"); 930 #endif 931 932 /* Acknowledge the interrupts. */ 933 934 max_write(MAX_REG_HIRQ, status); 935 936 /* Detect device connection/disconnection. */ 937 938 if ((devstate == MAX_DEVSTATE_INIT) && connection_event && devicechanged()) 939 { 940 devstate = MAX_DEVSTATE_CONNECTED; 941 framecount = 200; 942 printf("CONNECTED\n"); 943 } 944 945 /* Handle device connection. */ 946 947 else if ((devstate == MAX_DEVSTATE_CONNECTED) && frame_event && !(--framecount)) 948 { 949 /* Reset the device. */ 950 951 max_write(MAX_REG_HCTL, MAX_HCTL_BUSRST); 952 devstate = MAX_DEVSTATE_START; 953 printf("START\n"); 954 } 955 956 /* Handle device reset initiation. */ 957 958 else if ((devstate == MAX_DEVSTATE_START) && bus_event) 959 { 960 devstate = MAX_DEVSTATE_RESET; 961 framecount = 200; 962 printf("RESET\n"); 963 } 964 965 /* Handle device reset completion, getting device details and 966 resetting the device again. */ 967 968 else if ((devstate == MAX_DEVSTATE_RESET) && frame_event && !(--framecount)) 969 { 970 if (!max_init_device(&device)) 971 printf("FAILED: RESET -> INSPECTED\n"); 972 else 973 { 974 devstate = MAX_DEVSTATE_INSPECTED; 975 printf("INSPECTED\n"); 976 } 977 } 978 979 /* Handle second reset initiation. */ 980 981 else if ((devstate == MAX_DEVSTATE_INSPECTED) && bus_event) 982 { 983 devstate = MAX_DEVSTATE_RESET_AGAIN; 984 framecount = 200; 985 printf("RESET_AGAIN\n"); 986 } 987 988 /* Handle second reset completion, setting the address. */ 989 990 else if ((devstate == MAX_DEVSTATE_RESET_AGAIN) && frame_event && !(--framecount)) 991 { 992 if (!max_complete_device(&device)) 993 printf("FAILED: RESET_AGAIN -> ADDRESSING\n"); 994 else 995 { 996 max_set_address(&device); 997 devstate = MAX_DEVSTATE_ADDRESSING; 998 framecount = 30; 999 printf("ADDRESSING\n"); 1000 } 1001 } 1002 1003 /* Post-addressing. */ 1004 1005 else if ((devstate == MAX_DEVSTATE_ADDRESSING) && frame_event && !(--framecount)) 1006 { 1007 usb_show_languages(max_get_descriptor(&device, USB_DT_STRING, 0, 0, false)); 1008 usb_show_configuration(max_get_descriptor(&device, USB_DT_CONFIG, 0, 0, false)); 1009 devstate = MAX_DEVSTATE_READY; 1010 printf("READY\n"); 1011 } 1012 1013 /* Handle device disconnection. */ 1014 1015 else if ((devstate != MAX_DEVSTATE_INIT) && connection_event && !devicechanged()) 1016 { 1017 devstate = MAX_DEVSTATE_INIT; 1018 printf("INIT\n"); 1019 } 1020 } 1021 } 1022 1023 printf("Closing...\n"); 1024 ubb_close(0); 1025 1026 return 0; 1027 }