drivers/usb/gadget/f_fastboot.c

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