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 static char *fb_response_str; 155 156 void fastboot_fail(const char *reason) 157 { 158 strncpy(fb_response_str, "FAIL\0", 5); 159 strncat(fb_response_str, reason, FASTBOOT_RESPONSE_LEN - 4 - 1); 160 } 161 162 void fastboot_okay(const char *reason) 163 { 164 strncpy(fb_response_str, "OKAY\0", 5); 165 strncat(fb_response_str, reason, FASTBOOT_RESPONSE_LEN - 4 - 1); 166 } 167 168 static void fastboot_complete(struct usb_ep *ep, struct usb_request *req) 169 { 170 int status = req->status; 171 if (!status) 172 return; 173 printf("status: %d ep '%s' trans: %d\n", status, ep->name, req->actual); 174 } 175 176 static int fastboot_bind(struct usb_configuration *c, struct usb_function *f) 177 { 178 int id; 179 struct usb_gadget *gadget = c->cdev->gadget; 180 struct f_fastboot *f_fb = func_to_fastboot(f); 181 const char *s; 182 183 /* DYNAMIC interface numbers assignments */ 184 id = usb_interface_id(c, f); 185 if (id < 0) 186 return id; 187 interface_desc.bInterfaceNumber = id; 188 189 id = usb_string_id(c->cdev); 190 if (id < 0) 191 return id; 192 fastboot_string_defs[0].id = id; 193 interface_desc.iInterface = id; 194 195 f_fb->in_ep = usb_ep_autoconfig(gadget, &fs_ep_in); 196 if (!f_fb->in_ep) 197 return -ENODEV; 198 f_fb->in_ep->driver_data = c->cdev; 199 200 f_fb->out_ep = usb_ep_autoconfig(gadget, &fs_ep_out); 201 if (!f_fb->out_ep) 202 return -ENODEV; 203 f_fb->out_ep->driver_data = c->cdev; 204 205 f->descriptors = fb_fs_function; 206 207 if (gadget_is_dualspeed(gadget)) { 208 /* Assume endpoint addresses are the same for both speeds */ 209 hs_ep_in.bEndpointAddress = fs_ep_in.bEndpointAddress; 210 hs_ep_out.bEndpointAddress = fs_ep_out.bEndpointAddress; 211 /* copy HS descriptors */ 212 f->hs_descriptors = fb_hs_function; 213 } 214 215 s = env_get("serial#"); 216 if (s) 217 g_dnl_set_serialnumber((char *)s); 218 219 return 0; 220 } 221 222 static void fastboot_unbind(struct usb_configuration *c, struct usb_function *f) 223 { 224 memset(fastboot_func, 0, sizeof(*fastboot_func)); 225 } 226 227 static void fastboot_disable(struct usb_function *f) 228 { 229 struct f_fastboot *f_fb = func_to_fastboot(f); 230 231 usb_ep_disable(f_fb->out_ep); 232 usb_ep_disable(f_fb->in_ep); 233 234 if (f_fb->out_req) { 235 free(f_fb->out_req->buf); 236 usb_ep_free_request(f_fb->out_ep, f_fb->out_req); 237 f_fb->out_req = NULL; 238 } 239 if (f_fb->in_req) { 240 free(f_fb->in_req->buf); 241 usb_ep_free_request(f_fb->in_ep, f_fb->in_req); 242 f_fb->in_req = NULL; 243 } 244 } 245 246 static struct usb_request *fastboot_start_ep(struct usb_ep *ep) 247 { 248 struct usb_request *req; 249 250 req = usb_ep_alloc_request(ep, 0); 251 if (!req) 252 return NULL; 253 254 req->length = EP_BUFFER_SIZE; 255 req->buf = memalign(CONFIG_SYS_CACHELINE_SIZE, EP_BUFFER_SIZE); 256 if (!req->buf) { 257 usb_ep_free_request(ep, req); 258 return NULL; 259 } 260 261 memset(req->buf, 0, req->length); 262 return req; 263 } 264 265 static int fastboot_set_alt(struct usb_function *f, 266 unsigned interface, unsigned alt) 267 { 268 int ret; 269 struct usb_composite_dev *cdev = f->config->cdev; 270 struct usb_gadget *gadget = cdev->gadget; 271 struct f_fastboot *f_fb = func_to_fastboot(f); 272 const struct usb_endpoint_descriptor *d; 273 274 debug("%s: func: %s intf: %d alt: %d\n", 275 __func__, f->name, interface, alt); 276 277 d = fb_ep_desc(gadget, &fs_ep_out, &hs_ep_out); 278 ret = usb_ep_enable(f_fb->out_ep, d); 279 if (ret) { 280 puts("failed to enable out ep\n"); 281 return ret; 282 } 283 284 f_fb->out_req = fastboot_start_ep(f_fb->out_ep); 285 if (!f_fb->out_req) { 286 puts("failed to alloc out req\n"); 287 ret = -EINVAL; 288 goto err; 289 } 290 f_fb->out_req->complete = rx_handler_command; 291 292 d = fb_ep_desc(gadget, &fs_ep_in, &hs_ep_in); 293 ret = usb_ep_enable(f_fb->in_ep, d); 294 if (ret) { 295 puts("failed to enable in ep\n"); 296 goto err; 297 } 298 299 f_fb->in_req = fastboot_start_ep(f_fb->in_ep); 300 if (!f_fb->in_req) { 301 puts("failed alloc req in\n"); 302 ret = -EINVAL; 303 goto err; 304 } 305 f_fb->in_req->complete = fastboot_complete; 306 307 ret = usb_ep_queue(f_fb->out_ep, f_fb->out_req, 0); 308 if (ret) 309 goto err; 310 311 return 0; 312 err: 313 fastboot_disable(f); 314 return ret; 315 } 316 317 static int fastboot_add(struct usb_configuration *c) 318 { 319 struct f_fastboot *f_fb = fastboot_func; 320 int status; 321 322 debug("%s: cdev: 0x%p\n", __func__, c->cdev); 323 324 if (!f_fb) { 325 f_fb = memalign(CONFIG_SYS_CACHELINE_SIZE, sizeof(*f_fb)); 326 if (!f_fb) 327 return -ENOMEM; 328 329 fastboot_func = f_fb; 330 memset(f_fb, 0, sizeof(*f_fb)); 331 } 332 333 f_fb->usb_function.name = "f_fastboot"; 334 f_fb->usb_function.bind = fastboot_bind; 335 f_fb->usb_function.unbind = fastboot_unbind; 336 f_fb->usb_function.set_alt = fastboot_set_alt; 337 f_fb->usb_function.disable = fastboot_disable; 338 f_fb->usb_function.strings = fastboot_strings; 339 340 status = usb_add_function(c, &f_fb->usb_function); 341 if (status) { 342 free(f_fb); 343 fastboot_func = f_fb; 344 } 345 346 return status; 347 } 348 DECLARE_GADGET_BIND_CALLBACK(usb_dnl_fastboot, fastboot_add); 349 350 static int fastboot_tx_write(const char *buffer, unsigned int buffer_size) 351 { 352 struct usb_request *in_req = fastboot_func->in_req; 353 int ret; 354 355 memcpy(in_req->buf, buffer, buffer_size); 356 in_req->length = buffer_size; 357 358 usb_ep_dequeue(fastboot_func->in_ep, in_req); 359 360 ret = usb_ep_queue(fastboot_func->in_ep, in_req, 0); 361 if (ret) 362 printf("Error %d on queue\n", ret); 363 return 0; 364 } 365 366 static int fastboot_tx_write_str(const char *buffer) 367 { 368 return fastboot_tx_write(buffer, strlen(buffer)); 369 } 370 371 static void compl_do_reset(struct usb_ep *ep, struct usb_request *req) 372 { 373 do_reset(NULL, 0, 0, NULL); 374 } 375 376 int __weak fb_set_reboot_flag(void) 377 { 378 return -ENOSYS; 379 } 380 381 static void cb_reboot(struct usb_ep *ep, struct usb_request *req) 382 { 383 char *cmd = req->buf; 384 if (!strcmp_l1("reboot-bootloader", cmd)) { 385 if (fb_set_reboot_flag()) { 386 fastboot_tx_write_str("FAILCannot set reboot flag"); 387 return; 388 } 389 } 390 fastboot_func->in_req->complete = compl_do_reset; 391 fastboot_tx_write_str("OKAY"); 392 } 393 394 static int strcmp_l1(const char *s1, const char *s2) 395 { 396 if (!s1 || !s2) 397 return -1; 398 return strncmp(s1, s2, strlen(s1)); 399 } 400 401 static void cb_getvar(struct usb_ep *ep, struct usb_request *req) 402 { 403 char *cmd = req->buf; 404 char response[FASTBOOT_RESPONSE_LEN]; 405 const char *s; 406 size_t chars_left; 407 408 strcpy(response, "OKAY"); 409 chars_left = sizeof(response) - strlen(response) - 1; 410 411 strsep(&cmd, ":"); 412 if (!cmd) { 413 pr_err("missing variable"); 414 fastboot_tx_write_str("FAILmissing var"); 415 return; 416 } 417 418 if (!strcmp_l1("version", cmd)) { 419 strncat(response, FASTBOOT_VERSION, chars_left); 420 } else if (!strcmp_l1("bootloader-version", cmd)) { 421 strncat(response, U_BOOT_VERSION, chars_left); 422 } else if (!strcmp_l1("downloadsize", cmd) || 423 !strcmp_l1("max-download-size", cmd)) { 424 char str_num[12]; 425 426 sprintf(str_num, "0x%08x", CONFIG_FASTBOOT_BUF_SIZE); 427 strncat(response, str_num, chars_left); 428 } else if (!strcmp_l1("serialno", cmd)) { 429 s = env_get("serial#"); 430 if (s) 431 strncat(response, s, chars_left); 432 else 433 strcpy(response, "FAILValue not set"); 434 } else { 435 char *envstr; 436 437 envstr = malloc(strlen("fastboot.") + strlen(cmd) + 1); 438 if (!envstr) { 439 fastboot_tx_write_str("FAILmalloc error"); 440 return; 441 } 442 443 sprintf(envstr, "fastboot.%s", cmd); 444 s = env_get(envstr); 445 if (s) { 446 strncat(response, s, chars_left); 447 } else { 448 printf("WARNING: unknown variable: %s\n", cmd); 449 strcpy(response, "FAILVariable not implemented"); 450 } 451 452 free(envstr); 453 } 454 fastboot_tx_write_str(response); 455 } 456 457 static unsigned int rx_bytes_expected(struct usb_ep *ep) 458 { 459 int rx_remain = download_size - download_bytes; 460 unsigned int rem; 461 unsigned int maxpacket = ep->maxpacket; 462 463 if (rx_remain <= 0) 464 return 0; 465 else if (rx_remain > EP_BUFFER_SIZE) 466 return EP_BUFFER_SIZE; 467 468 /* 469 * Some controllers e.g. DWC3 don't like OUT transfers to be 470 * not ending in maxpacket boundary. So just make them happy by 471 * always requesting for integral multiple of maxpackets. 472 * This shouldn't bother controllers that don't care about it. 473 */ 474 rem = rx_remain % maxpacket; 475 if (rem > 0) 476 rx_remain = rx_remain + (maxpacket - rem); 477 478 return rx_remain; 479 } 480 481 #define BYTES_PER_DOT 0x20000 482 static void rx_handler_dl_image(struct usb_ep *ep, struct usb_request *req) 483 { 484 char response[FASTBOOT_RESPONSE_LEN]; 485 unsigned int transfer_size = download_size - download_bytes; 486 const unsigned char *buffer = req->buf; 487 unsigned int buffer_size = req->actual; 488 unsigned int pre_dot_num, now_dot_num; 489 490 if (req->status != 0) { 491 printf("Bad status: %d\n", req->status); 492 return; 493 } 494 495 if (buffer_size < transfer_size) 496 transfer_size = buffer_size; 497 498 memcpy((void *)CONFIG_FASTBOOT_BUF_ADDR + download_bytes, 499 buffer, transfer_size); 500 501 pre_dot_num = download_bytes / BYTES_PER_DOT; 502 download_bytes += transfer_size; 503 now_dot_num = download_bytes / BYTES_PER_DOT; 504 505 if (pre_dot_num != now_dot_num) { 506 putc('.'); 507 if (!(now_dot_num % 74)) 508 putc('\n'); 509 } 510 511 /* Check if transfer is done */ 512 if (download_bytes >= download_size) { 513 /* 514 * Reset global transfer variable, keep download_bytes because 515 * it will be used in the next possible flashing command 516 */ 517 download_size = 0; 518 req->complete = rx_handler_command; 519 req->length = EP_BUFFER_SIZE; 520 521 strcpy(response, "OKAY"); 522 fastboot_tx_write_str(response); 523 524 printf("\ndownloading of %d bytes finished\n", download_bytes); 525 } else { 526 req->length = rx_bytes_expected(ep); 527 } 528 529 req->actual = 0; 530 usb_ep_queue(ep, req, 0); 531 } 532 533 static void cb_download(struct usb_ep *ep, struct usb_request *req) 534 { 535 char *cmd = req->buf; 536 char response[FASTBOOT_RESPONSE_LEN]; 537 538 strsep(&cmd, ":"); 539 download_size = simple_strtoul(cmd, NULL, 16); 540 download_bytes = 0; 541 542 printf("Starting download of %d bytes\n", download_size); 543 544 if (0 == download_size) { 545 strcpy(response, "FAILdata invalid size"); 546 } else if (download_size > CONFIG_FASTBOOT_BUF_SIZE) { 547 download_size = 0; 548 strcpy(response, "FAILdata too large"); 549 } else { 550 sprintf(response, "DATA%08x", download_size); 551 req->complete = rx_handler_dl_image; 552 req->length = rx_bytes_expected(ep); 553 } 554 fastboot_tx_write_str(response); 555 } 556 557 static void do_bootm_on_complete(struct usb_ep *ep, struct usb_request *req) 558 { 559 char boot_addr_start[12]; 560 char *bootm_args[] = { "bootm", boot_addr_start, NULL }; 561 562 puts("Booting kernel..\n"); 563 564 sprintf(boot_addr_start, "0x%lx", (long)CONFIG_FASTBOOT_BUF_ADDR); 565 do_bootm(NULL, 0, 2, bootm_args); 566 567 /* This only happens if image is somehow faulty so we start over */ 568 do_reset(NULL, 0, 0, NULL); 569 } 570 571 static void cb_boot(struct usb_ep *ep, struct usb_request *req) 572 { 573 fastboot_func->in_req->complete = do_bootm_on_complete; 574 fastboot_tx_write_str("OKAY"); 575 } 576 577 static void do_exit_on_complete(struct usb_ep *ep, struct usb_request *req) 578 { 579 g_dnl_trigger_detach(); 580 } 581 582 static void cb_continue(struct usb_ep *ep, struct usb_request *req) 583 { 584 fastboot_func->in_req->complete = do_exit_on_complete; 585 fastboot_tx_write_str("OKAY"); 586 } 587 588 #ifdef CONFIG_FASTBOOT_FLASH 589 static void cb_flash(struct usb_ep *ep, struct usb_request *req) 590 { 591 char *cmd = req->buf; 592 char response[FASTBOOT_RESPONSE_LEN]; 593 594 strsep(&cmd, ":"); 595 if (!cmd) { 596 pr_err("missing partition name"); 597 fastboot_tx_write_str("FAILmissing partition name"); 598 return; 599 } 600 601 /* initialize the response buffer */ 602 fb_response_str = response; 603 604 fastboot_fail("no flash device defined"); 605 #ifdef CONFIG_FASTBOOT_FLASH_MMC_DEV 606 fb_mmc_flash_write(cmd, (void *)CONFIG_FASTBOOT_BUF_ADDR, 607 download_bytes); 608 #endif 609 #ifdef CONFIG_FASTBOOT_FLASH_NAND_DEV 610 fb_nand_flash_write(cmd, 611 (void *)CONFIG_FASTBOOT_BUF_ADDR, 612 download_bytes); 613 #endif 614 fastboot_tx_write_str(response); 615 } 616 #endif 617 618 static void cb_oem(struct usb_ep *ep, struct usb_request *req) 619 { 620 char *cmd = req->buf; 621 #ifdef CONFIG_FASTBOOT_FLASH_MMC_DEV 622 if (strncmp("format", cmd + 4, 6) == 0) { 623 char cmdbuf[32]; 624 sprintf(cmdbuf, "gpt write mmc %x $partitions", 625 CONFIG_FASTBOOT_FLASH_MMC_DEV); 626 if (run_command(cmdbuf, 0)) 627 fastboot_tx_write_str("FAIL"); 628 else 629 fastboot_tx_write_str("OKAY"); 630 } else 631 #endif 632 if (strncmp("unlock", cmd + 4, 8) == 0) { 633 fastboot_tx_write_str("FAILnot implemented"); 634 } 635 else { 636 fastboot_tx_write_str("FAILunknown oem command"); 637 } 638 } 639 640 #ifdef CONFIG_FASTBOOT_FLASH 641 static void cb_erase(struct usb_ep *ep, struct usb_request *req) 642 { 643 char *cmd = req->buf; 644 char response[FASTBOOT_RESPONSE_LEN]; 645 646 strsep(&cmd, ":"); 647 if (!cmd) { 648 pr_err("missing partition name"); 649 fastboot_tx_write_str("FAILmissing partition name"); 650 return; 651 } 652 653 /* initialize the response buffer */ 654 fb_response_str = response; 655 656 fastboot_fail("no flash device defined"); 657 #ifdef CONFIG_FASTBOOT_FLASH_MMC_DEV 658 fb_mmc_erase(cmd); 659 #endif 660 #ifdef CONFIG_FASTBOOT_FLASH_NAND_DEV 661 fb_nand_erase(cmd); 662 #endif 663 fastboot_tx_write_str(response); 664 } 665 #endif 666 667 struct cmd_dispatch_info { 668 char *cmd; 669 void (*cb)(struct usb_ep *ep, struct usb_request *req); 670 }; 671 672 static const struct cmd_dispatch_info cmd_dispatch_info[] = { 673 { 674 .cmd = "reboot", 675 .cb = cb_reboot, 676 }, { 677 .cmd = "getvar:", 678 .cb = cb_getvar, 679 }, { 680 .cmd = "download:", 681 .cb = cb_download, 682 }, { 683 .cmd = "boot", 684 .cb = cb_boot, 685 }, { 686 .cmd = "continue", 687 .cb = cb_continue, 688 }, 689 #ifdef CONFIG_FASTBOOT_FLASH 690 { 691 .cmd = "flash", 692 .cb = cb_flash, 693 }, { 694 .cmd = "erase", 695 .cb = cb_erase, 696 }, 697 #endif 698 { 699 .cmd = "oem", 700 .cb = cb_oem, 701 }, 702 }; 703 704 static void rx_handler_command(struct usb_ep *ep, struct usb_request *req) 705 { 706 char *cmdbuf = req->buf; 707 void (*func_cb)(struct usb_ep *ep, struct usb_request *req) = NULL; 708 int i; 709 710 if (req->status != 0 || req->length == 0) 711 return; 712 713 for (i = 0; i < ARRAY_SIZE(cmd_dispatch_info); i++) { 714 if (!strcmp_l1(cmd_dispatch_info[i].cmd, cmdbuf)) { 715 func_cb = cmd_dispatch_info[i].cb; 716 break; 717 } 718 } 719 720 if (!func_cb) { 721 pr_err("unknown command: %.*s", req->actual, cmdbuf); 722 fastboot_tx_write_str("FAILunknown command"); 723 } else { 724 if (req->actual < req->length) { 725 u8 *buf = (u8 *)req->buf; 726 buf[req->actual] = 0; 727 func_cb(ep, req); 728 } else { 729 pr_err("buffer overflow"); 730 fastboot_tx_write_str("FAILbuffer overflow"); 731 } 732 } 733 734 *cmdbuf = '\0'; 735 req->actual = 0; 736 usb_ep_queue(ep, req, 0); 737 } 738