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); 152 153 154 void fastboot_fail(char *response, const char *reason) 155 { 156 strncpy(response, "FAIL\0", 5); 157 strncat(response, reason, FASTBOOT_RESPONSE_LEN - 4 - 1); 158 } 159 160 void fastboot_okay(char *response, const char *reason) 161 { 162 strncpy(response, "OKAY\0", 5); 163 strncat(response, reason, FASTBOOT_RESPONSE_LEN - 4 - 1); 164 } 165 166 static void fastboot_complete(struct usb_ep *ep, struct usb_request *req) 167 { 168 int status = req->status; 169 if (!status) 170 return; 171 printf("status: %d ep '%s' trans: %d\n", status, ep->name, req->actual); 172 } 173 174 static int fastboot_bind(struct usb_configuration *c, struct usb_function *f) 175 { 176 int id; 177 struct usb_gadget *gadget = c->cdev->gadget; 178 struct f_fastboot *f_fb = func_to_fastboot(f); 179 const char *s; 180 181 /* DYNAMIC interface numbers assignments */ 182 id = usb_interface_id(c, f); 183 if (id < 0) 184 return id; 185 interface_desc.bInterfaceNumber = id; 186 187 id = usb_string_id(c->cdev); 188 if (id < 0) 189 return id; 190 fastboot_string_defs[0].id = id; 191 interface_desc.iInterface = id; 192 193 f_fb->in_ep = usb_ep_autoconfig(gadget, &fs_ep_in); 194 if (!f_fb->in_ep) 195 return -ENODEV; 196 f_fb->in_ep->driver_data = c->cdev; 197 198 f_fb->out_ep = usb_ep_autoconfig(gadget, &fs_ep_out); 199 if (!f_fb->out_ep) 200 return -ENODEV; 201 f_fb->out_ep->driver_data = c->cdev; 202 203 f->descriptors = fb_fs_function; 204 205 if (gadget_is_dualspeed(gadget)) { 206 /* Assume endpoint addresses are the same for both speeds */ 207 hs_ep_in.bEndpointAddress = fs_ep_in.bEndpointAddress; 208 hs_ep_out.bEndpointAddress = fs_ep_out.bEndpointAddress; 209 /* copy HS descriptors */ 210 f->hs_descriptors = fb_hs_function; 211 } 212 213 s = getenv("serial#"); 214 if (s) 215 g_dnl_set_serialnumber((char *)s); 216 217 return 0; 218 } 219 220 static void fastboot_unbind(struct usb_configuration *c, struct usb_function *f) 221 { 222 memset(fastboot_func, 0, sizeof(*fastboot_func)); 223 } 224 225 static void fastboot_disable(struct usb_function *f) 226 { 227 struct f_fastboot *f_fb = func_to_fastboot(f); 228 229 usb_ep_disable(f_fb->out_ep); 230 usb_ep_disable(f_fb->in_ep); 231 232 if (f_fb->out_req) { 233 free(f_fb->out_req->buf); 234 usb_ep_free_request(f_fb->out_ep, f_fb->out_req); 235 f_fb->out_req = NULL; 236 } 237 if (f_fb->in_req) { 238 free(f_fb->in_req->buf); 239 usb_ep_free_request(f_fb->in_ep, f_fb->in_req); 240 f_fb->in_req = NULL; 241 } 242 } 243 244 static struct usb_request *fastboot_start_ep(struct usb_ep *ep) 245 { 246 struct usb_request *req; 247 248 req = usb_ep_alloc_request(ep, 0); 249 if (!req) 250 return NULL; 251 252 req->length = EP_BUFFER_SIZE; 253 req->buf = memalign(CONFIG_SYS_CACHELINE_SIZE, EP_BUFFER_SIZE); 254 if (!req->buf) { 255 usb_ep_free_request(ep, req); 256 return NULL; 257 } 258 259 memset(req->buf, 0, req->length); 260 return req; 261 } 262 263 static int fastboot_set_alt(struct usb_function *f, 264 unsigned interface, unsigned alt) 265 { 266 int ret; 267 struct usb_composite_dev *cdev = f->config->cdev; 268 struct usb_gadget *gadget = cdev->gadget; 269 struct f_fastboot *f_fb = func_to_fastboot(f); 270 const struct usb_endpoint_descriptor *d; 271 272 debug("%s: func: %s intf: %d alt: %d\n", 273 __func__, f->name, interface, alt); 274 275 d = fb_ep_desc(gadget, &fs_ep_out, &hs_ep_out); 276 ret = usb_ep_enable(f_fb->out_ep, d); 277 if (ret) { 278 puts("failed to enable out ep\n"); 279 return ret; 280 } 281 282 f_fb->out_req = fastboot_start_ep(f_fb->out_ep); 283 if (!f_fb->out_req) { 284 puts("failed to alloc out req\n"); 285 ret = -EINVAL; 286 goto err; 287 } 288 f_fb->out_req->complete = rx_handler_command; 289 290 d = fb_ep_desc(gadget, &fs_ep_in, &hs_ep_in); 291 ret = usb_ep_enable(f_fb->in_ep, d); 292 if (ret) { 293 puts("failed to enable in ep\n"); 294 goto err; 295 } 296 297 f_fb->in_req = fastboot_start_ep(f_fb->in_ep); 298 if (!f_fb->in_req) { 299 puts("failed alloc req in\n"); 300 ret = -EINVAL; 301 goto err; 302 } 303 f_fb->in_req->complete = fastboot_complete; 304 305 ret = usb_ep_queue(f_fb->out_ep, f_fb->out_req, 0); 306 if (ret) 307 goto err; 308 309 return 0; 310 err: 311 fastboot_disable(f); 312 return ret; 313 } 314 315 static int fastboot_add(struct usb_configuration *c) 316 { 317 struct f_fastboot *f_fb = fastboot_func; 318 int status; 319 320 debug("%s: cdev: 0x%p\n", __func__, c->cdev); 321 322 if (!f_fb) { 323 f_fb = memalign(CONFIG_SYS_CACHELINE_SIZE, sizeof(*f_fb)); 324 if (!f_fb) 325 return -ENOMEM; 326 327 fastboot_func = f_fb; 328 memset(f_fb, 0, sizeof(*f_fb)); 329 } 330 331 f_fb->usb_function.name = "f_fastboot"; 332 f_fb->usb_function.bind = fastboot_bind; 333 f_fb->usb_function.unbind = fastboot_unbind; 334 f_fb->usb_function.set_alt = fastboot_set_alt; 335 f_fb->usb_function.disable = fastboot_disable; 336 f_fb->usb_function.strings = fastboot_strings; 337 338 status = usb_add_function(c, &f_fb->usb_function); 339 if (status) { 340 free(f_fb); 341 fastboot_func = f_fb; 342 } 343 344 return status; 345 } 346 DECLARE_GADGET_BIND_CALLBACK(usb_dnl_fastboot, fastboot_add); 347 348 static int fastboot_tx_write(const char *buffer, unsigned int buffer_size) 349 { 350 struct usb_request *in_req = fastboot_func->in_req; 351 int ret; 352 353 memcpy(in_req->buf, buffer, buffer_size); 354 in_req->length = buffer_size; 355 356 usb_ep_dequeue(fastboot_func->in_ep, in_req); 357 358 ret = usb_ep_queue(fastboot_func->in_ep, in_req, 0); 359 if (ret) 360 printf("Error %d on queue\n", ret); 361 return 0; 362 } 363 364 static int fastboot_tx_write_str(const char *buffer) 365 { 366 return fastboot_tx_write(buffer, strlen(buffer)); 367 } 368 369 static void compl_do_reset(struct usb_ep *ep, struct usb_request *req) 370 { 371 do_reset(NULL, 0, 0, NULL); 372 } 373 374 int __weak fb_set_reboot_flag(void) 375 { 376 return -ENOSYS; 377 } 378 379 static void cb_reboot(struct usb_ep *ep, struct usb_request *req) 380 { 381 char *cmd = req->buf; 382 if (!strcmp_l1("reboot-bootloader", cmd)) { 383 if (fb_set_reboot_flag()) { 384 fastboot_tx_write_str("FAILCannot set reboot flag"); 385 return; 386 } 387 } 388 fastboot_func->in_req->complete = compl_do_reset; 389 fastboot_tx_write_str("OKAY"); 390 } 391 392 static int strcmp_l1(const char *s1, const char *s2) 393 { 394 if (!s1 || !s2) 395 return -1; 396 return strncmp(s1, s2, strlen(s1)); 397 } 398 399 static void cb_getvar(struct usb_ep *ep, struct usb_request *req) 400 { 401 char *cmd = req->buf; 402 char response[FASTBOOT_RESPONSE_LEN]; 403 const char *s; 404 size_t chars_left; 405 406 strcpy(response, "OKAY"); 407 chars_left = sizeof(response) - strlen(response) - 1; 408 409 strsep(&cmd, ":"); 410 if (!cmd) { 411 error("missing variable"); 412 fastboot_tx_write_str("FAILmissing var"); 413 return; 414 } 415 416 if (!strcmp_l1("version", cmd)) { 417 strncat(response, FASTBOOT_VERSION, chars_left); 418 } else if (!strcmp_l1("bootloader-version", cmd)) { 419 strncat(response, U_BOOT_VERSION, chars_left); 420 } else if (!strcmp_l1("downloadsize", cmd) || 421 !strcmp_l1("max-download-size", cmd)) { 422 char str_num[12]; 423 424 sprintf(str_num, "0x%08x", CONFIG_FASTBOOT_BUF_SIZE); 425 strncat(response, str_num, chars_left); 426 } else if (!strcmp_l1("serialno", cmd)) { 427 s = getenv("serial#"); 428 if (s) 429 strncat(response, s, chars_left); 430 else 431 strcpy(response, "FAILValue not set"); 432 } else { 433 char envstr[32]; 434 435 snprintf(envstr, sizeof(envstr) - 1, "fastboot.%s", cmd); 436 s = getenv(envstr); 437 if (s) { 438 strncat(response, s, chars_left); 439 } else { 440 printf("WARNING: unknown variable: %s\n", cmd); 441 strcpy(response, "FAILVariable not implemented"); 442 } 443 } 444 fastboot_tx_write_str(response); 445 } 446 447 static unsigned int rx_bytes_expected(struct usb_ep *ep) 448 { 449 int rx_remain = download_size - download_bytes; 450 unsigned int rem; 451 unsigned int maxpacket = ep->maxpacket; 452 453 if (rx_remain <= 0) 454 return 0; 455 else if (rx_remain > EP_BUFFER_SIZE) 456 return EP_BUFFER_SIZE; 457 458 /* 459 * Some controllers e.g. DWC3 don't like OUT transfers to be 460 * not ending in maxpacket boundary. So just make them happy by 461 * always requesting for integral multiple of maxpackets. 462 * This shouldn't bother controllers that don't care about it. 463 */ 464 rem = rx_remain % maxpacket; 465 if (rem > 0) 466 rx_remain = rx_remain + (maxpacket - rem); 467 468 return rx_remain; 469 } 470 471 #define BYTES_PER_DOT 0x20000 472 static void rx_handler_dl_image(struct usb_ep *ep, struct usb_request *req) 473 { 474 char response[FASTBOOT_RESPONSE_LEN]; 475 unsigned int transfer_size = download_size - download_bytes; 476 const unsigned char *buffer = req->buf; 477 unsigned int buffer_size = req->actual; 478 unsigned int pre_dot_num, now_dot_num; 479 480 if (req->status != 0) { 481 printf("Bad status: %d\n", req->status); 482 return; 483 } 484 485 if (buffer_size < transfer_size) 486 transfer_size = buffer_size; 487 488 memcpy((void *)CONFIG_FASTBOOT_BUF_ADDR + download_bytes, 489 buffer, transfer_size); 490 491 pre_dot_num = download_bytes / BYTES_PER_DOT; 492 download_bytes += transfer_size; 493 now_dot_num = download_bytes / BYTES_PER_DOT; 494 495 if (pre_dot_num != now_dot_num) { 496 putc('.'); 497 if (!(now_dot_num % 74)) 498 putc('\n'); 499 } 500 501 /* Check if transfer is done */ 502 if (download_bytes >= download_size) { 503 /* 504 * Reset global transfer variable, keep download_bytes because 505 * it will be used in the next possible flashing command 506 */ 507 download_size = 0; 508 req->complete = rx_handler_command; 509 req->length = EP_BUFFER_SIZE; 510 511 strcpy(response, "OKAY"); 512 fastboot_tx_write_str(response); 513 514 printf("\ndownloading of %d bytes finished\n", download_bytes); 515 } else { 516 req->length = rx_bytes_expected(ep); 517 } 518 519 req->actual = 0; 520 usb_ep_queue(ep, req, 0); 521 } 522 523 static void cb_download(struct usb_ep *ep, struct usb_request *req) 524 { 525 char *cmd = req->buf; 526 char response[FASTBOOT_RESPONSE_LEN]; 527 528 strsep(&cmd, ":"); 529 download_size = simple_strtoul(cmd, NULL, 16); 530 download_bytes = 0; 531 532 printf("Starting download of %d bytes\n", download_size); 533 534 if (0 == download_size) { 535 strcpy(response, "FAILdata invalid size"); 536 } else if (download_size > CONFIG_FASTBOOT_BUF_SIZE) { 537 download_size = 0; 538 strcpy(response, "FAILdata too large"); 539 } else { 540 sprintf(response, "DATA%08x", download_size); 541 req->complete = rx_handler_dl_image; 542 req->length = rx_bytes_expected(ep); 543 } 544 fastboot_tx_write_str(response); 545 } 546 547 static void do_bootm_on_complete(struct usb_ep *ep, struct usb_request *req) 548 { 549 char boot_addr_start[12]; 550 char *bootm_args[] = { "bootm", boot_addr_start, NULL }; 551 552 puts("Booting kernel..\n"); 553 554 sprintf(boot_addr_start, "0x%lx", load_addr); 555 do_bootm(NULL, 0, 2, bootm_args); 556 557 /* This only happens if image is somehow faulty so we start over */ 558 do_reset(NULL, 0, 0, NULL); 559 } 560 561 static void cb_boot(struct usb_ep *ep, struct usb_request *req) 562 { 563 fastboot_func->in_req->complete = do_bootm_on_complete; 564 fastboot_tx_write_str("OKAY"); 565 } 566 567 static void do_exit_on_complete(struct usb_ep *ep, struct usb_request *req) 568 { 569 g_dnl_trigger_detach(); 570 } 571 572 static void cb_continue(struct usb_ep *ep, struct usb_request *req) 573 { 574 fastboot_func->in_req->complete = do_exit_on_complete; 575 fastboot_tx_write_str("OKAY"); 576 } 577 578 #ifdef CONFIG_FASTBOOT_FLASH 579 static void cb_flash(struct usb_ep *ep, struct usb_request *req) 580 { 581 char *cmd = req->buf; 582 char response[FASTBOOT_RESPONSE_LEN]; 583 584 strsep(&cmd, ":"); 585 if (!cmd) { 586 error("missing partition name"); 587 fastboot_tx_write_str("FAILmissing partition name"); 588 return; 589 } 590 591 strcpy(response, "FAILno flash device defined"); 592 #ifdef CONFIG_FASTBOOT_FLASH_MMC_DEV 593 fb_mmc_flash_write(cmd, (void *)CONFIG_FASTBOOT_BUF_ADDR, 594 download_bytes, response); 595 #endif 596 #ifdef CONFIG_FASTBOOT_FLASH_NAND_DEV 597 fb_nand_flash_write(cmd, 598 (void *)CONFIG_FASTBOOT_BUF_ADDR, 599 download_bytes, response); 600 #endif 601 fastboot_tx_write_str(response); 602 } 603 #endif 604 605 static void cb_oem(struct usb_ep *ep, struct usb_request *req) 606 { 607 char *cmd = req->buf; 608 #ifdef CONFIG_FASTBOOT_FLASH_MMC_DEV 609 if (strncmp("format", cmd + 4, 6) == 0) { 610 char cmdbuf[32]; 611 sprintf(cmdbuf, "gpt write mmc %x $partitions", 612 CONFIG_FASTBOOT_FLASH_MMC_DEV); 613 if (run_command(cmdbuf, 0)) 614 fastboot_tx_write_str("FAIL"); 615 else 616 fastboot_tx_write_str("OKAY"); 617 } else 618 #endif 619 if (strncmp("unlock", cmd + 4, 8) == 0) { 620 fastboot_tx_write_str("FAILnot implemented"); 621 } 622 else { 623 fastboot_tx_write_str("FAILunknown oem command"); 624 } 625 } 626 627 #ifdef CONFIG_FASTBOOT_FLASH 628 static void cb_erase(struct usb_ep *ep, struct usb_request *req) 629 { 630 char *cmd = req->buf; 631 char response[FASTBOOT_RESPONSE_LEN]; 632 633 strsep(&cmd, ":"); 634 if (!cmd) { 635 error("missing partition name"); 636 fastboot_tx_write_str("FAILmissing partition name"); 637 return; 638 } 639 640 strcpy(response, "FAILno flash device defined"); 641 642 #ifdef CONFIG_FASTBOOT_FLASH_MMC_DEV 643 fb_mmc_erase(cmd, response); 644 #endif 645 #ifdef CONFIG_FASTBOOT_FLASH_NAND_DEV 646 fb_nand_erase(cmd, response); 647 #endif 648 fastboot_tx_write_str(response); 649 } 650 #endif 651 652 struct cmd_dispatch_info { 653 char *cmd; 654 void (*cb)(struct usb_ep *ep, struct usb_request *req); 655 }; 656 657 static const struct cmd_dispatch_info cmd_dispatch_info[] = { 658 { 659 .cmd = "reboot", 660 .cb = cb_reboot, 661 }, { 662 .cmd = "getvar:", 663 .cb = cb_getvar, 664 }, { 665 .cmd = "download:", 666 .cb = cb_download, 667 }, { 668 .cmd = "boot", 669 .cb = cb_boot, 670 }, { 671 .cmd = "continue", 672 .cb = cb_continue, 673 }, 674 #ifdef CONFIG_FASTBOOT_FLASH 675 { 676 .cmd = "flash", 677 .cb = cb_flash, 678 }, { 679 .cmd = "erase", 680 .cb = cb_erase, 681 }, 682 #endif 683 { 684 .cmd = "oem", 685 .cb = cb_oem, 686 }, 687 }; 688 689 static void rx_handler_command(struct usb_ep *ep, struct usb_request *req) 690 { 691 char *cmdbuf = req->buf; 692 void (*func_cb)(struct usb_ep *ep, struct usb_request *req) = NULL; 693 int i; 694 695 if (req->status != 0 || req->length == 0) 696 return; 697 698 for (i = 0; i < ARRAY_SIZE(cmd_dispatch_info); i++) { 699 if (!strcmp_l1(cmd_dispatch_info[i].cmd, cmdbuf)) { 700 func_cb = cmd_dispatch_info[i].cb; 701 break; 702 } 703 } 704 705 if (!func_cb) { 706 error("unknown command: %s", cmdbuf); 707 fastboot_tx_write_str("FAILunknown command"); 708 } else { 709 if (req->actual < req->length) { 710 u8 *buf = (u8 *)req->buf; 711 buf[req->actual] = 0; 712 func_cb(ep, req); 713 } else { 714 error("buffer overflow"); 715 fastboot_tx_write_str("FAILbuffer overflow"); 716 } 717 } 718 719 *cmdbuf = '\0'; 720 req->actual = 0; 721 usb_ep_queue(ep, req, 0); 722 } 723