1 /* 2 * (C) Copyright 2008 - 2009 3 * Windriver, <www.windriver.com> 4 * Tom Rix <Tom.Rix@windriver.com> 5 * 6 * Copyright 2011 Sebastian Andrzej Siewior <bigeasy@linutronix.de> 7 * 8 * Copyright 2014 Linaro, Ltd. 9 * Rob Herring <robh@kernel.org> 10 * 11 * SPDX-License-Identifier: GPL-2.0+ 12 */ 13 #include <config.h> 14 #include <common.h> 15 #include <errno.h> 16 #include <fastboot.h> 17 #include <malloc.h> 18 #include <linux/usb/ch9.h> 19 #include <linux/usb/gadget.h> 20 #include <linux/usb/composite.h> 21 #include <linux/compiler.h> 22 #include <version.h> 23 #include <g_dnl.h> 24 #ifdef CONFIG_FASTBOOT_FLASH_MMC_DEV 25 #include <fb_mmc.h> 26 #endif 27 #ifdef CONFIG_FASTBOOT_FLASH_NAND_DEV 28 #include <fb_nand.h> 29 #endif 30 31 #define FASTBOOT_VERSION "0.4" 32 33 #define FASTBOOT_INTERFACE_CLASS 0xff 34 #define FASTBOOT_INTERFACE_SUB_CLASS 0x42 35 #define FASTBOOT_INTERFACE_PROTOCOL 0x03 36 37 #define RX_ENDPOINT_MAXIMUM_PACKET_SIZE_2_0 (0x0200) 38 #define RX_ENDPOINT_MAXIMUM_PACKET_SIZE_1_1 (0x0040) 39 #define TX_ENDPOINT_MAXIMUM_PACKET_SIZE (0x0040) 40 41 #define EP_BUFFER_SIZE 4096 42 /* 43 * EP_BUFFER_SIZE must always be an integral multiple of maxpacket size 44 * (64 or 512 or 1024), else we break on certain controllers like DWC3 45 * that expect bulk OUT requests to be divisible by maxpacket size. 46 */ 47 48 struct f_fastboot { 49 struct usb_function usb_function; 50 51 /* IN/OUT EP's and corresponding requests */ 52 struct usb_ep *in_ep, *out_ep; 53 struct usb_request *in_req, *out_req; 54 }; 55 56 static inline struct f_fastboot *func_to_fastboot(struct usb_function *f) 57 { 58 return container_of(f, struct f_fastboot, usb_function); 59 } 60 61 static struct f_fastboot *fastboot_func; 62 static unsigned int download_size; 63 static unsigned int download_bytes; 64 65 static struct usb_endpoint_descriptor fs_ep_in = { 66 .bLength = USB_DT_ENDPOINT_SIZE, 67 .bDescriptorType = USB_DT_ENDPOINT, 68 .bEndpointAddress = USB_DIR_IN, 69 .bmAttributes = USB_ENDPOINT_XFER_BULK, 70 .wMaxPacketSize = cpu_to_le16(64), 71 }; 72 73 static struct usb_endpoint_descriptor fs_ep_out = { 74 .bLength = USB_DT_ENDPOINT_SIZE, 75 .bDescriptorType = USB_DT_ENDPOINT, 76 .bEndpointAddress = USB_DIR_OUT, 77 .bmAttributes = USB_ENDPOINT_XFER_BULK, 78 .wMaxPacketSize = cpu_to_le16(64), 79 }; 80 81 static struct usb_endpoint_descriptor hs_ep_in = { 82 .bLength = USB_DT_ENDPOINT_SIZE, 83 .bDescriptorType = USB_DT_ENDPOINT, 84 .bEndpointAddress = USB_DIR_IN, 85 .bmAttributes = USB_ENDPOINT_XFER_BULK, 86 .wMaxPacketSize = cpu_to_le16(512), 87 }; 88 89 static struct usb_endpoint_descriptor hs_ep_out = { 90 .bLength = USB_DT_ENDPOINT_SIZE, 91 .bDescriptorType = USB_DT_ENDPOINT, 92 .bEndpointAddress = USB_DIR_OUT, 93 .bmAttributes = USB_ENDPOINT_XFER_BULK, 94 .wMaxPacketSize = cpu_to_le16(512), 95 }; 96 97 static struct usb_interface_descriptor interface_desc = { 98 .bLength = USB_DT_INTERFACE_SIZE, 99 .bDescriptorType = USB_DT_INTERFACE, 100 .bInterfaceNumber = 0x00, 101 .bAlternateSetting = 0x00, 102 .bNumEndpoints = 0x02, 103 .bInterfaceClass = FASTBOOT_INTERFACE_CLASS, 104 .bInterfaceSubClass = FASTBOOT_INTERFACE_SUB_CLASS, 105 .bInterfaceProtocol = FASTBOOT_INTERFACE_PROTOCOL, 106 }; 107 108 static struct usb_descriptor_header *fb_fs_function[] = { 109 (struct usb_descriptor_header *)&interface_desc, 110 (struct usb_descriptor_header *)&fs_ep_in, 111 (struct usb_descriptor_header *)&fs_ep_out, 112 }; 113 114 static struct usb_descriptor_header *fb_hs_function[] = { 115 (struct usb_descriptor_header *)&interface_desc, 116 (struct usb_descriptor_header *)&hs_ep_in, 117 (struct usb_descriptor_header *)&hs_ep_out, 118 NULL, 119 }; 120 121 static struct usb_endpoint_descriptor * 122 fb_ep_desc(struct usb_gadget *g, struct usb_endpoint_descriptor *fs, 123 struct usb_endpoint_descriptor *hs) 124 { 125 if (gadget_is_dualspeed(g) && g->speed == USB_SPEED_HIGH) 126 return hs; 127 return fs; 128 } 129 130 /* 131 * static strings, in UTF-8 132 */ 133 static const char fastboot_name[] = "Android Fastboot"; 134 135 static struct usb_string fastboot_string_defs[] = { 136 [0].s = fastboot_name, 137 { } /* end of list */ 138 }; 139 140 static struct usb_gadget_strings stringtab_fastboot = { 141 .language = 0x0409, /* en-us */ 142 .strings = fastboot_string_defs, 143 }; 144 145 static struct usb_gadget_strings *fastboot_strings[] = { 146 &stringtab_fastboot, 147 NULL, 148 }; 149 150 static void rx_handler_command(struct usb_ep *ep, struct usb_request *req); 151 static int strcmp_l1(const char *s1, const char *s2); 152 153 static void fastboot_complete(struct usb_ep *ep, struct usb_request *req) 154 { 155 int status = req->status; 156 if (!status) 157 return; 158 printf("status: %d ep '%s' trans: %d\n", status, ep->name, req->actual); 159 } 160 161 static int fastboot_bind(struct usb_configuration *c, struct usb_function *f) 162 { 163 int id; 164 struct usb_gadget *gadget = c->cdev->gadget; 165 struct f_fastboot *f_fb = func_to_fastboot(f); 166 const char *s; 167 168 /* DYNAMIC interface numbers assignments */ 169 id = usb_interface_id(c, f); 170 if (id < 0) 171 return id; 172 interface_desc.bInterfaceNumber = id; 173 174 id = usb_string_id(c->cdev); 175 if (id < 0) 176 return id; 177 fastboot_string_defs[0].id = id; 178 interface_desc.iInterface = id; 179 180 f_fb->in_ep = usb_ep_autoconfig(gadget, &fs_ep_in); 181 if (!f_fb->in_ep) 182 return -ENODEV; 183 f_fb->in_ep->driver_data = c->cdev; 184 185 f_fb->out_ep = usb_ep_autoconfig(gadget, &fs_ep_out); 186 if (!f_fb->out_ep) 187 return -ENODEV; 188 f_fb->out_ep->driver_data = c->cdev; 189 190 f->descriptors = fb_fs_function; 191 192 if (gadget_is_dualspeed(gadget)) { 193 /* Assume endpoint addresses are the same for both speeds */ 194 hs_ep_in.bEndpointAddress = fs_ep_in.bEndpointAddress; 195 hs_ep_out.bEndpointAddress = fs_ep_out.bEndpointAddress; 196 /* copy HS descriptors */ 197 f->hs_descriptors = fb_hs_function; 198 } 199 200 s = env_get("serial#"); 201 if (s) 202 g_dnl_set_serialnumber((char *)s); 203 204 return 0; 205 } 206 207 static void fastboot_unbind(struct usb_configuration *c, struct usb_function *f) 208 { 209 memset(fastboot_func, 0, sizeof(*fastboot_func)); 210 } 211 212 static void fastboot_disable(struct usb_function *f) 213 { 214 struct f_fastboot *f_fb = func_to_fastboot(f); 215 216 usb_ep_disable(f_fb->out_ep); 217 usb_ep_disable(f_fb->in_ep); 218 219 if (f_fb->out_req) { 220 free(f_fb->out_req->buf); 221 usb_ep_free_request(f_fb->out_ep, f_fb->out_req); 222 f_fb->out_req = NULL; 223 } 224 if (f_fb->in_req) { 225 free(f_fb->in_req->buf); 226 usb_ep_free_request(f_fb->in_ep, f_fb->in_req); 227 f_fb->in_req = NULL; 228 } 229 } 230 231 static struct usb_request *fastboot_start_ep(struct usb_ep *ep) 232 { 233 struct usb_request *req; 234 235 req = usb_ep_alloc_request(ep, 0); 236 if (!req) 237 return NULL; 238 239 req->length = EP_BUFFER_SIZE; 240 req->buf = memalign(CONFIG_SYS_CACHELINE_SIZE, EP_BUFFER_SIZE); 241 if (!req->buf) { 242 usb_ep_free_request(ep, req); 243 return NULL; 244 } 245 246 memset(req->buf, 0, req->length); 247 return req; 248 } 249 250 static int fastboot_set_alt(struct usb_function *f, 251 unsigned interface, unsigned alt) 252 { 253 int ret; 254 struct usb_composite_dev *cdev = f->config->cdev; 255 struct usb_gadget *gadget = cdev->gadget; 256 struct f_fastboot *f_fb = func_to_fastboot(f); 257 const struct usb_endpoint_descriptor *d; 258 259 debug("%s: func: %s intf: %d alt: %d\n", 260 __func__, f->name, interface, alt); 261 262 d = fb_ep_desc(gadget, &fs_ep_out, &hs_ep_out); 263 ret = usb_ep_enable(f_fb->out_ep, d); 264 if (ret) { 265 puts("failed to enable out ep\n"); 266 return ret; 267 } 268 269 f_fb->out_req = fastboot_start_ep(f_fb->out_ep); 270 if (!f_fb->out_req) { 271 puts("failed to alloc out req\n"); 272 ret = -EINVAL; 273 goto err; 274 } 275 f_fb->out_req->complete = rx_handler_command; 276 277 d = fb_ep_desc(gadget, &fs_ep_in, &hs_ep_in); 278 ret = usb_ep_enable(f_fb->in_ep, d); 279 if (ret) { 280 puts("failed to enable in ep\n"); 281 goto err; 282 } 283 284 f_fb->in_req = fastboot_start_ep(f_fb->in_ep); 285 if (!f_fb->in_req) { 286 puts("failed alloc req in\n"); 287 ret = -EINVAL; 288 goto err; 289 } 290 f_fb->in_req->complete = fastboot_complete; 291 292 ret = usb_ep_queue(f_fb->out_ep, f_fb->out_req, 0); 293 if (ret) 294 goto err; 295 296 return 0; 297 err: 298 fastboot_disable(f); 299 return ret; 300 } 301 302 static int fastboot_add(struct usb_configuration *c) 303 { 304 struct f_fastboot *f_fb = fastboot_func; 305 int status; 306 307 debug("%s: cdev: 0x%p\n", __func__, c->cdev); 308 309 if (!f_fb) { 310 f_fb = memalign(CONFIG_SYS_CACHELINE_SIZE, sizeof(*f_fb)); 311 if (!f_fb) 312 return -ENOMEM; 313 314 fastboot_func = f_fb; 315 memset(f_fb, 0, sizeof(*f_fb)); 316 } 317 318 f_fb->usb_function.name = "f_fastboot"; 319 f_fb->usb_function.bind = fastboot_bind; 320 f_fb->usb_function.unbind = fastboot_unbind; 321 f_fb->usb_function.set_alt = fastboot_set_alt; 322 f_fb->usb_function.disable = fastboot_disable; 323 f_fb->usb_function.strings = fastboot_strings; 324 325 status = usb_add_function(c, &f_fb->usb_function); 326 if (status) { 327 free(f_fb); 328 fastboot_func = f_fb; 329 } 330 331 return status; 332 } 333 DECLARE_GADGET_BIND_CALLBACK(usb_dnl_fastboot, fastboot_add); 334 335 static int fastboot_tx_write(const char *buffer, unsigned int buffer_size) 336 { 337 struct usb_request *in_req = fastboot_func->in_req; 338 int ret; 339 340 memcpy(in_req->buf, buffer, buffer_size); 341 in_req->length = buffer_size; 342 343 usb_ep_dequeue(fastboot_func->in_ep, in_req); 344 345 ret = usb_ep_queue(fastboot_func->in_ep, in_req, 0); 346 if (ret) 347 printf("Error %d on queue\n", ret); 348 return 0; 349 } 350 351 static int fastboot_tx_write_str(const char *buffer) 352 { 353 return fastboot_tx_write(buffer, strlen(buffer)); 354 } 355 356 static void compl_do_reset(struct usb_ep *ep, struct usb_request *req) 357 { 358 do_reset(NULL, 0, 0, NULL); 359 } 360 361 int __weak fb_set_reboot_flag(void) 362 { 363 return -ENOSYS; 364 } 365 366 static void cb_reboot(struct usb_ep *ep, struct usb_request *req) 367 { 368 char *cmd = req->buf; 369 if (!strcmp_l1("reboot-bootloader", cmd)) { 370 if (fb_set_reboot_flag()) { 371 fastboot_tx_write_str("FAILCannot set reboot flag"); 372 return; 373 } 374 } 375 fastboot_func->in_req->complete = compl_do_reset; 376 fastboot_tx_write_str("OKAY"); 377 } 378 379 static int strcmp_l1(const char *s1, const char *s2) 380 { 381 if (!s1 || !s2) 382 return -1; 383 return strncmp(s1, s2, strlen(s1)); 384 } 385 386 static void cb_getvar(struct usb_ep *ep, struct usb_request *req) 387 { 388 char *cmd = req->buf; 389 char response[FASTBOOT_RESPONSE_LEN]; 390 const char *s; 391 size_t chars_left; 392 393 strcpy(response, "OKAY"); 394 chars_left = sizeof(response) - strlen(response) - 1; 395 396 strsep(&cmd, ":"); 397 if (!cmd) { 398 error("missing variable"); 399 fastboot_tx_write_str("FAILmissing var"); 400 return; 401 } 402 403 if (!strcmp_l1("version", cmd)) { 404 strncat(response, FASTBOOT_VERSION, chars_left); 405 } else if (!strcmp_l1("bootloader-version", cmd)) { 406 strncat(response, U_BOOT_VERSION, chars_left); 407 } else if (!strcmp_l1("downloadsize", cmd) || 408 !strcmp_l1("max-download-size", cmd)) { 409 char str_num[12]; 410 411 sprintf(str_num, "0x%08x", CONFIG_FASTBOOT_BUF_SIZE); 412 strncat(response, str_num, chars_left); 413 } else if (!strcmp_l1("serialno", cmd)) { 414 s = env_get("serial#"); 415 if (s) 416 strncat(response, s, chars_left); 417 else 418 strcpy(response, "FAILValue not set"); 419 } else { 420 char *envstr; 421 422 envstr = malloc(strlen("fastboot.") + strlen(cmd) + 1); 423 if (!envstr) { 424 fastboot_tx_write_str("FAILmalloc error"); 425 return; 426 } 427 428 sprintf(envstr, "fastboot.%s", cmd); 429 s = env_get(envstr); 430 if (s) { 431 strncat(response, s, chars_left); 432 } else { 433 printf("WARNING: unknown variable: %s\n", cmd); 434 strcpy(response, "FAILVariable not implemented"); 435 } 436 437 free(envstr); 438 } 439 fastboot_tx_write_str(response); 440 } 441 442 static unsigned int rx_bytes_expected(struct usb_ep *ep) 443 { 444 int rx_remain = download_size - download_bytes; 445 unsigned int rem; 446 unsigned int maxpacket = ep->maxpacket; 447 448 if (rx_remain <= 0) 449 return 0; 450 else if (rx_remain > EP_BUFFER_SIZE) 451 return EP_BUFFER_SIZE; 452 453 /* 454 * Some controllers e.g. DWC3 don't like OUT transfers to be 455 * not ending in maxpacket boundary. So just make them happy by 456 * always requesting for integral multiple of maxpackets. 457 * This shouldn't bother controllers that don't care about it. 458 */ 459 rem = rx_remain % maxpacket; 460 if (rem > 0) 461 rx_remain = rx_remain + (maxpacket - rem); 462 463 return rx_remain; 464 } 465 466 #define BYTES_PER_DOT 0x20000 467 static void rx_handler_dl_image(struct usb_ep *ep, struct usb_request *req) 468 { 469 char response[FASTBOOT_RESPONSE_LEN]; 470 unsigned int transfer_size = download_size - download_bytes; 471 const unsigned char *buffer = req->buf; 472 unsigned int buffer_size = req->actual; 473 unsigned int pre_dot_num, now_dot_num; 474 475 if (req->status != 0) { 476 printf("Bad status: %d\n", req->status); 477 return; 478 } 479 480 if (buffer_size < transfer_size) 481 transfer_size = buffer_size; 482 483 memcpy((void *)CONFIG_FASTBOOT_BUF_ADDR + download_bytes, 484 buffer, transfer_size); 485 486 pre_dot_num = download_bytes / BYTES_PER_DOT; 487 download_bytes += transfer_size; 488 now_dot_num = download_bytes / BYTES_PER_DOT; 489 490 if (pre_dot_num != now_dot_num) { 491 putc('.'); 492 if (!(now_dot_num % 74)) 493 putc('\n'); 494 } 495 496 /* Check if transfer is done */ 497 if (download_bytes >= download_size) { 498 /* 499 * Reset global transfer variable, keep download_bytes because 500 * it will be used in the next possible flashing command 501 */ 502 download_size = 0; 503 req->complete = rx_handler_command; 504 req->length = EP_BUFFER_SIZE; 505 506 strcpy(response, "OKAY"); 507 fastboot_tx_write_str(response); 508 509 printf("\ndownloading of %d bytes finished\n", download_bytes); 510 } else { 511 req->length = rx_bytes_expected(ep); 512 } 513 514 req->actual = 0; 515 usb_ep_queue(ep, req, 0); 516 } 517 518 static void cb_download(struct usb_ep *ep, struct usb_request *req) 519 { 520 char *cmd = req->buf; 521 char response[FASTBOOT_RESPONSE_LEN]; 522 523 strsep(&cmd, ":"); 524 download_size = simple_strtoul(cmd, NULL, 16); 525 download_bytes = 0; 526 527 printf("Starting download of %d bytes\n", download_size); 528 529 if (0 == download_size) { 530 strcpy(response, "FAILdata invalid size"); 531 } else if (download_size > CONFIG_FASTBOOT_BUF_SIZE) { 532 download_size = 0; 533 strcpy(response, "FAILdata too large"); 534 } else { 535 sprintf(response, "DATA%08x", download_size); 536 req->complete = rx_handler_dl_image; 537 req->length = rx_bytes_expected(ep); 538 } 539 fastboot_tx_write_str(response); 540 } 541 542 static void do_bootm_on_complete(struct usb_ep *ep, struct usb_request *req) 543 { 544 char boot_addr_start[12]; 545 char *bootm_args[] = { "bootm", boot_addr_start, NULL }; 546 547 puts("Booting kernel..\n"); 548 549 sprintf(boot_addr_start, "0x%lx", (long)CONFIG_FASTBOOT_BUF_ADDR); 550 do_bootm(NULL, 0, 2, bootm_args); 551 552 /* This only happens if image is somehow faulty so we start over */ 553 do_reset(NULL, 0, 0, NULL); 554 } 555 556 static void cb_boot(struct usb_ep *ep, struct usb_request *req) 557 { 558 fastboot_func->in_req->complete = do_bootm_on_complete; 559 fastboot_tx_write_str("OKAY"); 560 } 561 562 static void do_exit_on_complete(struct usb_ep *ep, struct usb_request *req) 563 { 564 g_dnl_trigger_detach(); 565 } 566 567 static void cb_continue(struct usb_ep *ep, struct usb_request *req) 568 { 569 fastboot_func->in_req->complete = do_exit_on_complete; 570 fastboot_tx_write_str("OKAY"); 571 } 572 573 #ifdef CONFIG_FASTBOOT_FLASH 574 static void cb_flash(struct usb_ep *ep, struct usb_request *req) 575 { 576 char *cmd = req->buf; 577 char response[FASTBOOT_RESPONSE_LEN]; 578 579 strsep(&cmd, ":"); 580 if (!cmd) { 581 error("missing partition name"); 582 fastboot_tx_write_str("FAILmissing partition name"); 583 return; 584 } 585 586 fastboot_fail("no flash device defined", response); 587 #ifdef CONFIG_FASTBOOT_FLASH_MMC_DEV 588 fb_mmc_flash_write(cmd, (void *)CONFIG_FASTBOOT_BUF_ADDR, 589 download_bytes, response); 590 #endif 591 #ifdef CONFIG_FASTBOOT_FLASH_NAND_DEV 592 fb_nand_flash_write(cmd, (void *)CONFIG_FASTBOOT_BUF_ADDR, 593 download_bytes, response); 594 #endif 595 fastboot_tx_write_str(response); 596 } 597 #endif 598 599 static void cb_oem(struct usb_ep *ep, struct usb_request *req) 600 { 601 char *cmd = req->buf; 602 #ifdef CONFIG_FASTBOOT_FLASH_MMC_DEV 603 if (strncmp("format", cmd + 4, 6) == 0) { 604 char cmdbuf[32]; 605 sprintf(cmdbuf, "gpt write mmc %x $partitions", 606 CONFIG_FASTBOOT_FLASH_MMC_DEV); 607 if (run_command(cmdbuf, 0)) 608 fastboot_tx_write_str("FAIL"); 609 else 610 fastboot_tx_write_str("OKAY"); 611 } else 612 #endif 613 if (strncmp("unlock", cmd + 4, 8) == 0) { 614 fastboot_tx_write_str("FAILnot implemented"); 615 } 616 else { 617 fastboot_tx_write_str("FAILunknown oem command"); 618 } 619 } 620 621 #ifdef CONFIG_FASTBOOT_FLASH 622 static void cb_erase(struct usb_ep *ep, struct usb_request *req) 623 { 624 char *cmd = req->buf; 625 char response[FASTBOOT_RESPONSE_LEN]; 626 627 strsep(&cmd, ":"); 628 if (!cmd) { 629 error("missing partition name"); 630 fastboot_tx_write_str("FAILmissing partition name"); 631 return; 632 } 633 634 fastboot_fail("no flash device defined", response); 635 #ifdef CONFIG_FASTBOOT_FLASH_MMC_DEV 636 fb_mmc_erase(cmd, response); 637 #endif 638 #ifdef CONFIG_FASTBOOT_FLASH_NAND_DEV 639 fb_nand_erase(cmd, response); 640 #endif 641 fastboot_tx_write_str(response); 642 } 643 #endif 644 645 struct cmd_dispatch_info { 646 char *cmd; 647 void (*cb)(struct usb_ep *ep, struct usb_request *req); 648 }; 649 650 static const struct cmd_dispatch_info cmd_dispatch_info[] = { 651 { 652 .cmd = "reboot", 653 .cb = cb_reboot, 654 }, { 655 .cmd = "getvar:", 656 .cb = cb_getvar, 657 }, { 658 .cmd = "download:", 659 .cb = cb_download, 660 }, { 661 .cmd = "boot", 662 .cb = cb_boot, 663 }, { 664 .cmd = "continue", 665 .cb = cb_continue, 666 }, 667 #ifdef CONFIG_FASTBOOT_FLASH 668 { 669 .cmd = "flash", 670 .cb = cb_flash, 671 }, { 672 .cmd = "erase", 673 .cb = cb_erase, 674 }, 675 #endif 676 { 677 .cmd = "oem", 678 .cb = cb_oem, 679 }, 680 }; 681 682 static void rx_handler_command(struct usb_ep *ep, struct usb_request *req) 683 { 684 char *cmdbuf = req->buf; 685 void (*func_cb)(struct usb_ep *ep, struct usb_request *req) = NULL; 686 int i; 687 688 if (req->status != 0 || req->length == 0) 689 return; 690 691 for (i = 0; i < ARRAY_SIZE(cmd_dispatch_info); i++) { 692 if (!strcmp_l1(cmd_dispatch_info[i].cmd, cmdbuf)) { 693 func_cb = cmd_dispatch_info[i].cb; 694 break; 695 } 696 } 697 698 if (!func_cb) { 699 error("unknown command: %.*s", req->actual, cmdbuf); 700 fastboot_tx_write_str("FAILunknown command"); 701 } else { 702 if (req->actual < req->length) { 703 u8 *buf = (u8 *)req->buf; 704 buf[req->actual] = 0; 705 func_cb(ep, req); 706 } else { 707 error("buffer overflow"); 708 fastboot_tx_write_str("FAILbuffer overflow"); 709 } 710 } 711 712 *cmdbuf = '\0'; 713 req->actual = 0; 714 usb_ep_queue(ep, req, 0); 715 } 716