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 struct f_fastboot { 44 struct usb_function usb_function; 45 46 /* IN/OUT EP's and corresponding requests */ 47 struct usb_ep *in_ep, *out_ep; 48 struct usb_request *in_req, *out_req; 49 }; 50 51 static inline struct f_fastboot *func_to_fastboot(struct usb_function *f) 52 { 53 return container_of(f, struct f_fastboot, usb_function); 54 } 55 56 static struct f_fastboot *fastboot_func; 57 static unsigned int fastboot_flash_session_id; 58 static unsigned int download_size; 59 static unsigned int download_bytes; 60 static bool is_high_speed; 61 62 static struct usb_endpoint_descriptor fs_ep_in = { 63 .bLength = USB_DT_ENDPOINT_SIZE, 64 .bDescriptorType = USB_DT_ENDPOINT, 65 .bEndpointAddress = USB_DIR_IN, 66 .bmAttributes = USB_ENDPOINT_XFER_BULK, 67 .wMaxPacketSize = cpu_to_le16(64), 68 }; 69 70 static struct usb_endpoint_descriptor fs_ep_out = { 71 .bLength = USB_DT_ENDPOINT_SIZE, 72 .bDescriptorType = USB_DT_ENDPOINT, 73 .bEndpointAddress = USB_DIR_OUT, 74 .bmAttributes = USB_ENDPOINT_XFER_BULK, 75 .wMaxPacketSize = cpu_to_le16(64), 76 }; 77 78 static struct usb_endpoint_descriptor hs_ep_in = { 79 .bLength = USB_DT_ENDPOINT_SIZE, 80 .bDescriptorType = USB_DT_ENDPOINT, 81 .bEndpointAddress = USB_DIR_IN, 82 .bmAttributes = USB_ENDPOINT_XFER_BULK, 83 .wMaxPacketSize = cpu_to_le16(512), 84 }; 85 86 static struct usb_endpoint_descriptor hs_ep_out = { 87 .bLength = USB_DT_ENDPOINT_SIZE, 88 .bDescriptorType = USB_DT_ENDPOINT, 89 .bEndpointAddress = USB_DIR_OUT, 90 .bmAttributes = USB_ENDPOINT_XFER_BULK, 91 .wMaxPacketSize = cpu_to_le16(512), 92 }; 93 94 static struct usb_interface_descriptor interface_desc = { 95 .bLength = USB_DT_INTERFACE_SIZE, 96 .bDescriptorType = USB_DT_INTERFACE, 97 .bInterfaceNumber = 0x00, 98 .bAlternateSetting = 0x00, 99 .bNumEndpoints = 0x02, 100 .bInterfaceClass = FASTBOOT_INTERFACE_CLASS, 101 .bInterfaceSubClass = FASTBOOT_INTERFACE_SUB_CLASS, 102 .bInterfaceProtocol = FASTBOOT_INTERFACE_PROTOCOL, 103 }; 104 105 static struct usb_descriptor_header *fb_fs_function[] = { 106 (struct usb_descriptor_header *)&interface_desc, 107 (struct usb_descriptor_header *)&fs_ep_in, 108 (struct usb_descriptor_header *)&fs_ep_out, 109 }; 110 111 static struct usb_descriptor_header *fb_hs_function[] = { 112 (struct usb_descriptor_header *)&interface_desc, 113 (struct usb_descriptor_header *)&hs_ep_in, 114 (struct usb_descriptor_header *)&hs_ep_out, 115 NULL, 116 }; 117 118 /* 119 * static strings, in UTF-8 120 */ 121 static const char fastboot_name[] = "Android Fastboot"; 122 123 static struct usb_string fastboot_string_defs[] = { 124 [0].s = fastboot_name, 125 { } /* end of list */ 126 }; 127 128 static struct usb_gadget_strings stringtab_fastboot = { 129 .language = 0x0409, /* en-us */ 130 .strings = fastboot_string_defs, 131 }; 132 133 static struct usb_gadget_strings *fastboot_strings[] = { 134 &stringtab_fastboot, 135 NULL, 136 }; 137 138 static void rx_handler_command(struct usb_ep *ep, struct usb_request *req); 139 static int strcmp_l1(const char *s1, const char *s2); 140 141 142 void fastboot_fail(char *response, const char *reason) 143 { 144 strncpy(response, "FAIL\0", 5); 145 strncat(response, reason, FASTBOOT_RESPONSE_LEN - 4 - 1); 146 } 147 148 void fastboot_okay(char *response, const char *reason) 149 { 150 strncpy(response, "OKAY\0", 5); 151 strncat(response, reason, FASTBOOT_RESPONSE_LEN - 4 - 1); 152 } 153 154 static void fastboot_complete(struct usb_ep *ep, struct usb_request *req) 155 { 156 int status = req->status; 157 if (!status) 158 return; 159 printf("status: %d ep '%s' trans: %d\n", status, ep->name, req->actual); 160 } 161 162 static int fastboot_bind(struct usb_configuration *c, struct usb_function *f) 163 { 164 int id; 165 struct usb_gadget *gadget = c->cdev->gadget; 166 struct f_fastboot *f_fb = func_to_fastboot(f); 167 const char *s; 168 169 /* DYNAMIC interface numbers assignments */ 170 id = usb_interface_id(c, f); 171 if (id < 0) 172 return id; 173 interface_desc.bInterfaceNumber = id; 174 175 id = usb_string_id(c->cdev); 176 if (id < 0) 177 return id; 178 fastboot_string_defs[0].id = id; 179 interface_desc.iInterface = id; 180 181 f_fb->in_ep = usb_ep_autoconfig(gadget, &fs_ep_in); 182 if (!f_fb->in_ep) 183 return -ENODEV; 184 f_fb->in_ep->driver_data = c->cdev; 185 186 f_fb->out_ep = usb_ep_autoconfig(gadget, &fs_ep_out); 187 if (!f_fb->out_ep) 188 return -ENODEV; 189 f_fb->out_ep->driver_data = c->cdev; 190 191 f->descriptors = fb_fs_function; 192 193 if (gadget_is_dualspeed(gadget)) { 194 /* Assume endpoint addresses are the same for both speeds */ 195 hs_ep_in.bEndpointAddress = fs_ep_in.bEndpointAddress; 196 hs_ep_out.bEndpointAddress = fs_ep_out.bEndpointAddress; 197 /* copy HS descriptors */ 198 f->hs_descriptors = fb_hs_function; 199 } 200 201 s = getenv("serial#"); 202 if (s) 203 g_dnl_set_serialnumber((char *)s); 204 205 return 0; 206 } 207 208 static void fastboot_unbind(struct usb_configuration *c, struct usb_function *f) 209 { 210 memset(fastboot_func, 0, sizeof(*fastboot_func)); 211 } 212 213 static void fastboot_disable(struct usb_function *f) 214 { 215 struct f_fastboot *f_fb = func_to_fastboot(f); 216 217 usb_ep_disable(f_fb->out_ep); 218 usb_ep_disable(f_fb->in_ep); 219 220 if (f_fb->out_req) { 221 free(f_fb->out_req->buf); 222 usb_ep_free_request(f_fb->out_ep, f_fb->out_req); 223 f_fb->out_req = NULL; 224 } 225 if (f_fb->in_req) { 226 free(f_fb->in_req->buf); 227 usb_ep_free_request(f_fb->in_ep, f_fb->in_req); 228 f_fb->in_req = NULL; 229 } 230 } 231 232 static struct usb_request *fastboot_start_ep(struct usb_ep *ep) 233 { 234 struct usb_request *req; 235 236 req = usb_ep_alloc_request(ep, 0); 237 if (!req) 238 return NULL; 239 240 req->length = EP_BUFFER_SIZE; 241 req->buf = memalign(CONFIG_SYS_CACHELINE_SIZE, EP_BUFFER_SIZE); 242 if (!req->buf) { 243 usb_ep_free_request(ep, req); 244 return NULL; 245 } 246 247 memset(req->buf, 0, req->length); 248 return req; 249 } 250 251 static int fastboot_set_alt(struct usb_function *f, 252 unsigned interface, unsigned alt) 253 { 254 int ret; 255 struct usb_composite_dev *cdev = f->config->cdev; 256 struct usb_gadget *gadget = cdev->gadget; 257 struct f_fastboot *f_fb = func_to_fastboot(f); 258 259 debug("%s: func: %s intf: %d alt: %d\n", 260 __func__, f->name, interface, alt); 261 262 /* make sure we don't enable the ep twice */ 263 if (gadget->speed == USB_SPEED_HIGH) { 264 ret = usb_ep_enable(f_fb->out_ep, &hs_ep_out); 265 is_high_speed = true; 266 } else { 267 ret = usb_ep_enable(f_fb->out_ep, &fs_ep_out); 268 is_high_speed = false; 269 } 270 if (ret) { 271 puts("failed to enable out ep\n"); 272 return ret; 273 } 274 275 f_fb->out_req = fastboot_start_ep(f_fb->out_ep); 276 if (!f_fb->out_req) { 277 puts("failed to alloc out req\n"); 278 ret = -EINVAL; 279 goto err; 280 } 281 f_fb->out_req->complete = rx_handler_command; 282 283 ret = usb_ep_enable(f_fb->in_ep, &fs_ep_in); 284 if (ret) { 285 puts("failed to enable in ep\n"); 286 goto err; 287 } 288 289 f_fb->in_req = fastboot_start_ep(f_fb->in_ep); 290 if (!f_fb->in_req) { 291 puts("failed alloc req in\n"); 292 ret = -EINVAL; 293 goto err; 294 } 295 f_fb->in_req->complete = fastboot_complete; 296 297 ret = usb_ep_queue(f_fb->out_ep, f_fb->out_req, 0); 298 if (ret) 299 goto err; 300 301 return 0; 302 err: 303 fastboot_disable(f); 304 return ret; 305 } 306 307 static int fastboot_add(struct usb_configuration *c) 308 { 309 struct f_fastboot *f_fb = fastboot_func; 310 int status; 311 312 debug("%s: cdev: 0x%p\n", __func__, c->cdev); 313 314 if (!f_fb) { 315 f_fb = memalign(CONFIG_SYS_CACHELINE_SIZE, sizeof(*f_fb)); 316 if (!f_fb) 317 return -ENOMEM; 318 319 fastboot_func = f_fb; 320 memset(f_fb, 0, sizeof(*f_fb)); 321 } 322 323 f_fb->usb_function.name = "f_fastboot"; 324 f_fb->usb_function.bind = fastboot_bind; 325 f_fb->usb_function.unbind = fastboot_unbind; 326 f_fb->usb_function.set_alt = fastboot_set_alt; 327 f_fb->usb_function.disable = fastboot_disable; 328 f_fb->usb_function.strings = fastboot_strings; 329 330 status = usb_add_function(c, &f_fb->usb_function); 331 if (status) { 332 free(f_fb); 333 fastboot_func = f_fb; 334 } 335 336 return status; 337 } 338 DECLARE_GADGET_BIND_CALLBACK(usb_dnl_fastboot, fastboot_add); 339 340 static int fastboot_tx_write(const char *buffer, unsigned int buffer_size) 341 { 342 struct usb_request *in_req = fastboot_func->in_req; 343 int ret; 344 345 memcpy(in_req->buf, buffer, buffer_size); 346 in_req->length = buffer_size; 347 348 usb_ep_dequeue(fastboot_func->in_ep, in_req); 349 350 ret = usb_ep_queue(fastboot_func->in_ep, in_req, 0); 351 if (ret) 352 printf("Error %d on queue\n", ret); 353 return 0; 354 } 355 356 static int fastboot_tx_write_str(const char *buffer) 357 { 358 return fastboot_tx_write(buffer, strlen(buffer)); 359 } 360 361 static void compl_do_reset(struct usb_ep *ep, struct usb_request *req) 362 { 363 do_reset(NULL, 0, 0, NULL); 364 } 365 366 int __weak fb_set_reboot_flag(void) 367 { 368 return -ENOSYS; 369 } 370 371 static void cb_reboot(struct usb_ep *ep, struct usb_request *req) 372 { 373 char *cmd = req->buf; 374 if (!strcmp_l1("reboot-bootloader", cmd)) { 375 if (fb_set_reboot_flag()) { 376 fastboot_tx_write_str("FAILCannot set reboot flag"); 377 return; 378 } 379 } 380 fastboot_func->in_req->complete = compl_do_reset; 381 fastboot_tx_write_str("OKAY"); 382 } 383 384 static int strcmp_l1(const char *s1, const char *s2) 385 { 386 if (!s1 || !s2) 387 return -1; 388 return strncmp(s1, s2, strlen(s1)); 389 } 390 391 static void cb_getvar(struct usb_ep *ep, struct usb_request *req) 392 { 393 char *cmd = req->buf; 394 char response[FASTBOOT_RESPONSE_LEN]; 395 const char *s; 396 size_t chars_left; 397 398 strcpy(response, "OKAY"); 399 chars_left = sizeof(response) - strlen(response) - 1; 400 401 strsep(&cmd, ":"); 402 if (!cmd) { 403 error("missing variable"); 404 fastboot_tx_write_str("FAILmissing var"); 405 return; 406 } 407 408 if (!strcmp_l1("version", cmd)) { 409 strncat(response, FASTBOOT_VERSION, chars_left); 410 } else if (!strcmp_l1("bootloader-version", cmd)) { 411 strncat(response, U_BOOT_VERSION, chars_left); 412 } else if (!strcmp_l1("downloadsize", cmd) || 413 !strcmp_l1("max-download-size", cmd)) { 414 char str_num[12]; 415 416 sprintf(str_num, "0x%08x", CONFIG_FASTBOOT_BUF_SIZE); 417 strncat(response, str_num, chars_left); 418 419 /* 420 * This also indicates the start of a new flashing 421 * "session", in which we could have 1-N buffers to 422 * write to a partition. 423 * 424 * Reset our session counter. 425 */ 426 fastboot_flash_session_id = 0; 427 } else if (!strcmp_l1("serialno", cmd)) { 428 s = getenv("serial#"); 429 if (s) 430 strncat(response, s, chars_left); 431 else 432 strcpy(response, "FAILValue not set"); 433 } else { 434 char envstr[32]; 435 436 snprintf(envstr, sizeof(envstr) - 1, "fastboot.%s", cmd); 437 s = getenv(envstr); 438 if (s) { 439 strncat(response, s, chars_left); 440 } else { 441 printf("WARNING: unknown variable: %s\n", cmd); 442 strcpy(response, "FAILVariable not implemented"); 443 } 444 } 445 fastboot_tx_write_str(response); 446 } 447 448 static unsigned int rx_bytes_expected(unsigned int maxpacket) 449 { 450 int rx_remain = download_size - download_bytes; 451 int rem = 0; 452 if (rx_remain < 0) 453 return 0; 454 if (rx_remain > EP_BUFFER_SIZE) 455 return EP_BUFFER_SIZE; 456 if (rx_remain < maxpacket) { 457 rx_remain = maxpacket; 458 } else if (rx_remain % maxpacket != 0) { 459 rem = rx_remain % maxpacket; 460 rx_remain = rx_remain + (maxpacket - rem); 461 } 462 return rx_remain; 463 } 464 465 #define BYTES_PER_DOT 0x20000 466 static void rx_handler_dl_image(struct usb_ep *ep, struct usb_request *req) 467 { 468 char response[FASTBOOT_RESPONSE_LEN]; 469 unsigned int transfer_size = download_size - download_bytes; 470 const unsigned char *buffer = req->buf; 471 unsigned int buffer_size = req->actual; 472 unsigned int pre_dot_num, now_dot_num; 473 unsigned int max; 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 max = is_high_speed ? hs_ep_out.wMaxPacketSize : 512 fs_ep_out.wMaxPacketSize; 513 req->length = rx_bytes_expected(max); 514 if (req->length < ep->maxpacket) 515 req->length = ep->maxpacket; 516 } 517 518 req->actual = 0; 519 usb_ep_queue(ep, req, 0); 520 } 521 522 static void cb_download(struct usb_ep *ep, struct usb_request *req) 523 { 524 char *cmd = req->buf; 525 char response[FASTBOOT_RESPONSE_LEN]; 526 unsigned int max; 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 max = is_high_speed ? hs_ep_out.wMaxPacketSize : 543 fs_ep_out.wMaxPacketSize; 544 req->length = rx_bytes_expected(max); 545 if (req->length < ep->maxpacket) 546 req->length = ep->maxpacket; 547 } 548 fastboot_tx_write_str(response); 549 } 550 551 static void do_bootm_on_complete(struct usb_ep *ep, struct usb_request *req) 552 { 553 char boot_addr_start[12]; 554 char *bootm_args[] = { "bootm", boot_addr_start, NULL }; 555 556 puts("Booting kernel..\n"); 557 558 sprintf(boot_addr_start, "0x%lx", load_addr); 559 do_bootm(NULL, 0, 2, bootm_args); 560 561 /* This only happens if image is somehow faulty so we start over */ 562 do_reset(NULL, 0, 0, NULL); 563 } 564 565 static void cb_boot(struct usb_ep *ep, struct usb_request *req) 566 { 567 fastboot_func->in_req->complete = do_bootm_on_complete; 568 fastboot_tx_write_str("OKAY"); 569 } 570 571 static void do_exit_on_complete(struct usb_ep *ep, struct usb_request *req) 572 { 573 g_dnl_trigger_detach(); 574 } 575 576 static void cb_continue(struct usb_ep *ep, struct usb_request *req) 577 { 578 fastboot_func->in_req->complete = do_exit_on_complete; 579 fastboot_tx_write_str("OKAY"); 580 } 581 582 #ifdef CONFIG_FASTBOOT_FLASH 583 static void cb_flash(struct usb_ep *ep, struct usb_request *req) 584 { 585 char *cmd = req->buf; 586 char response[FASTBOOT_RESPONSE_LEN]; 587 588 strsep(&cmd, ":"); 589 if (!cmd) { 590 error("missing partition name"); 591 fastboot_tx_write_str("FAILmissing partition name"); 592 return; 593 } 594 595 strcpy(response, "FAILno flash device defined"); 596 #ifdef CONFIG_FASTBOOT_FLASH_MMC_DEV 597 fb_mmc_flash_write(cmd, fastboot_flash_session_id, 598 (void *)CONFIG_FASTBOOT_BUF_ADDR, 599 download_bytes, response); 600 #endif 601 #ifdef CONFIG_FASTBOOT_FLASH_NAND_DEV 602 fb_nand_flash_write(cmd, fastboot_flash_session_id, 603 (void *)CONFIG_FASTBOOT_BUF_ADDR, 604 download_bytes, response); 605 #endif 606 fastboot_flash_session_id++; 607 fastboot_tx_write_str(response); 608 } 609 #endif 610 611 static void cb_oem(struct usb_ep *ep, struct usb_request *req) 612 { 613 char *cmd = req->buf; 614 #ifdef CONFIG_FASTBOOT_FLASH_MMC_DEV 615 if (strncmp("format", cmd + 4, 6) == 0) { 616 char cmdbuf[32]; 617 sprintf(cmdbuf, "gpt write mmc %x $partitions", 618 CONFIG_FASTBOOT_FLASH_MMC_DEV); 619 if (run_command(cmdbuf, 0)) 620 fastboot_tx_write_str("FAIL"); 621 else 622 fastboot_tx_write_str("OKAY"); 623 } else 624 #endif 625 if (strncmp("unlock", cmd + 4, 8) == 0) { 626 fastboot_tx_write_str("FAILnot implemented"); 627 } 628 else { 629 fastboot_tx_write_str("FAILunknown oem command"); 630 } 631 } 632 633 #ifdef CONFIG_FASTBOOT_FLASH 634 static void cb_erase(struct usb_ep *ep, struct usb_request *req) 635 { 636 char *cmd = req->buf; 637 char response[FASTBOOT_RESPONSE_LEN]; 638 639 strsep(&cmd, ":"); 640 if (!cmd) { 641 error("missing partition name"); 642 fastboot_tx_write_str("FAILmissing partition name"); 643 return; 644 } 645 646 strcpy(response, "FAILno flash device defined"); 647 648 #ifdef CONFIG_FASTBOOT_FLASH_MMC_DEV 649 fb_mmc_erase(cmd, response); 650 #endif 651 #ifdef CONFIG_FASTBOOT_FLASH_NAND_DEV 652 fb_nand_erase(cmd, response); 653 #endif 654 fastboot_tx_write_str(response); 655 } 656 #endif 657 658 struct cmd_dispatch_info { 659 char *cmd; 660 void (*cb)(struct usb_ep *ep, struct usb_request *req); 661 }; 662 663 static const struct cmd_dispatch_info cmd_dispatch_info[] = { 664 { 665 .cmd = "reboot", 666 .cb = cb_reboot, 667 }, { 668 .cmd = "getvar:", 669 .cb = cb_getvar, 670 }, { 671 .cmd = "download:", 672 .cb = cb_download, 673 }, { 674 .cmd = "boot", 675 .cb = cb_boot, 676 }, { 677 .cmd = "continue", 678 .cb = cb_continue, 679 }, 680 #ifdef CONFIG_FASTBOOT_FLASH 681 { 682 .cmd = "flash", 683 .cb = cb_flash, 684 }, { 685 .cmd = "erase", 686 .cb = cb_erase, 687 }, 688 #endif 689 { 690 .cmd = "oem", 691 .cb = cb_oem, 692 }, 693 }; 694 695 static void rx_handler_command(struct usb_ep *ep, struct usb_request *req) 696 { 697 char *cmdbuf = req->buf; 698 void (*func_cb)(struct usb_ep *ep, struct usb_request *req) = NULL; 699 int i; 700 701 if (req->status != 0 || req->length == 0) 702 return; 703 704 for (i = 0; i < ARRAY_SIZE(cmd_dispatch_info); i++) { 705 if (!strcmp_l1(cmd_dispatch_info[i].cmd, cmdbuf)) { 706 func_cb = cmd_dispatch_info[i].cb; 707 break; 708 } 709 } 710 711 if (!func_cb) { 712 error("unknown command: %s", cmdbuf); 713 fastboot_tx_write_str("FAILunknown command"); 714 } else { 715 if (req->actual < req->length) { 716 u8 *buf = (u8 *)req->buf; 717 buf[req->actual] = 0; 718 func_cb(ep, req); 719 } else { 720 error("buffer overflow"); 721 fastboot_tx_write_str("FAILbuffer overflow"); 722 } 723 } 724 725 *cmdbuf = '\0'; 726 req->actual = 0; 727 usb_ep_queue(ep, req, 0); 728 } 729