git.sur5r.net Git - u-boot/blob - 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
  28 #define FASTBOOT_VERSION                "0.4"
  29
  30 #define FASTBOOT_INTERFACE_CLASS        0xff
  31 #define FASTBOOT_INTERFACE_SUB_CLASS    0x42
  32 #define FASTBOOT_INTERFACE_PROTOCOL     0x03
  33
  34 #define RX_ENDPOINT_MAXIMUM_PACKET_SIZE_2_0  (0x0200)
  35 #define RX_ENDPOINT_MAXIMUM_PACKET_SIZE_1_1  (0x0040)
  36 #define TX_ENDPOINT_MAXIMUM_PACKET_SIZE      (0x0040)
  37
  38 #define EP_BUFFER_SIZE                  4096
  39
  40 struct f_fastboot {
  41         struct usb_function usb_function;
  42
  43         /* IN/OUT EP's and corresponding requests */
  44         struct usb_ep *in_ep, *out_ep;
  45         struct usb_request *in_req, *out_req;
  46 };
  47
  48 static inline struct f_fastboot *func_to_fastboot(struct usb_function *f)
  49 {
  50         return container_of(f, struct f_fastboot, usb_function);
  51 }
  52
  53 static struct f_fastboot *fastboot_func;
  54 static unsigned int fastboot_flash_session_id;
  55 static unsigned int download_size;
  56 static unsigned int download_bytes;
  57 static bool is_high_speed;
  58
  59 static struct usb_endpoint_descriptor fs_ep_in = {
  60         .bLength            = USB_DT_ENDPOINT_SIZE,
  61         .bDescriptorType    = USB_DT_ENDPOINT,
  62         .bEndpointAddress   = USB_DIR_IN,
  63         .bmAttributes       = USB_ENDPOINT_XFER_BULK,
  64         .wMaxPacketSize     = TX_ENDPOINT_MAXIMUM_PACKET_SIZE,
  65         .bInterval          = 0x00,
  66 };
  67
  68 static struct usb_endpoint_descriptor fs_ep_out = {
  69         .bLength                = USB_DT_ENDPOINT_SIZE,
  70         .bDescriptorType        = USB_DT_ENDPOINT,
  71         .bEndpointAddress       = USB_DIR_OUT,
  72         .bmAttributes           = USB_ENDPOINT_XFER_BULK,
  73         .wMaxPacketSize         = RX_ENDPOINT_MAXIMUM_PACKET_SIZE_1_1,
  74         .bInterval              = 0x00,
  75 };
  76
  77 static struct usb_endpoint_descriptor hs_ep_out = {
  78         .bLength                = USB_DT_ENDPOINT_SIZE,
  79         .bDescriptorType        = USB_DT_ENDPOINT,
  80         .bEndpointAddress       = USB_DIR_OUT,
  81         .bmAttributes           = USB_ENDPOINT_XFER_BULK,
  82         .wMaxPacketSize         = RX_ENDPOINT_MAXIMUM_PACKET_SIZE_2_0,
  83         .bInterval              = 0x00,
  84 };
  85
  86 static struct usb_interface_descriptor interface_desc = {
  87         .bLength                = USB_DT_INTERFACE_SIZE,
  88         .bDescriptorType        = USB_DT_INTERFACE,
  89         .bInterfaceNumber       = 0x00,
  90         .bAlternateSetting      = 0x00,
  91         .bNumEndpoints          = 0x02,
  92         .bInterfaceClass        = FASTBOOT_INTERFACE_CLASS,
  93         .bInterfaceSubClass     = FASTBOOT_INTERFACE_SUB_CLASS,
  94         .bInterfaceProtocol     = FASTBOOT_INTERFACE_PROTOCOL,
  95 };
  96
  97 static struct usb_descriptor_header *fb_runtime_descs[] = {
  98         (struct usb_descriptor_header *)&interface_desc,
  99         (struct usb_descriptor_header *)&fs_ep_in,
 100         (struct usb_descriptor_header *)&hs_ep_out,
 101         NULL,
 102 };
 103
 104 /*
 105  * static strings, in UTF-8
 106  */
 107 static const char fastboot_name[] = "Android Fastboot";
 108
 109 static struct usb_string fastboot_string_defs[] = {
 110         [0].s = fastboot_name,
 111         {  }                    /* end of list */
 112 };
 113
 114 static struct usb_gadget_strings stringtab_fastboot = {
 115         .language       = 0x0409,       /* en-us */
 116         .strings        = fastboot_string_defs,
 117 };
 118
 119 static struct usb_gadget_strings *fastboot_strings[] = {
 120         &stringtab_fastboot,
 121         NULL,
 122 };
 123
 124 static void rx_handler_command(struct usb_ep *ep, struct usb_request *req);
 125 static int strcmp_l1(const char *s1, const char *s2);
 126
 127
 128 void fastboot_fail(char *response, const char *reason)
 129 {
 130         strncpy(response, "FAIL\0", 5);
 131         strncat(response, reason, FASTBOOT_RESPONSE_LEN - 4 - 1);
 132 }
 133
 134 void fastboot_okay(char *response, const char *reason)
 135 {
 136         strncpy(response, "OKAY\0", 5);
 137         strncat(response, reason, FASTBOOT_RESPONSE_LEN - 4 - 1);
 138 }
 139
 140 static void fastboot_complete(struct usb_ep *ep, struct usb_request *req)
 141 {
 142         int status = req->status;
 143         if (!status)
 144                 return;
 145         printf("status: %d ep '%s' trans: %d\n", status, ep->name, req->actual);
 146 }
 147
 148 static int fastboot_bind(struct usb_configuration *c, struct usb_function *f)
 149 {
 150         int id;
 151         struct usb_gadget *gadget = c->cdev->gadget;
 152         struct f_fastboot *f_fb = func_to_fastboot(f);
 153         const char *s;
 154
 155         /* DYNAMIC interface numbers assignments */
 156         id = usb_interface_id(c, f);
 157         if (id < 0)
 158                 return id;
 159         interface_desc.bInterfaceNumber = id;
 160
 161         id = usb_string_id(c->cdev);
 162         if (id < 0)
 163                 return id;
 164         fastboot_string_defs[0].id = id;
 165         interface_desc.iInterface = id;
 166
 167         f_fb->in_ep = usb_ep_autoconfig(gadget, &fs_ep_in);
 168         if (!f_fb->in_ep)
 169                 return -ENODEV;
 170         f_fb->in_ep->driver_data = c->cdev;
 171
 172         f_fb->out_ep = usb_ep_autoconfig(gadget, &fs_ep_out);
 173         if (!f_fb->out_ep)
 174                 return -ENODEV;
 175         f_fb->out_ep->driver_data = c->cdev;
 176
 177         hs_ep_out.bEndpointAddress = fs_ep_out.bEndpointAddress;
 178
 179         s = getenv("serial#");
 180         if (s)
 181                 g_dnl_set_serialnumber((char *)s);
 182
 183         return 0;
 184 }
 185
 186 static void fastboot_unbind(struct usb_configuration *c, struct usb_function *f)
 187 {
 188         memset(fastboot_func, 0, sizeof(*fastboot_func));
 189 }
 190
 191 static void fastboot_disable(struct usb_function *f)
 192 {
 193         struct f_fastboot *f_fb = func_to_fastboot(f);
 194
 195         usb_ep_disable(f_fb->out_ep);
 196         usb_ep_disable(f_fb->in_ep);
 197
 198         if (f_fb->out_req) {
 199                 free(f_fb->out_req->buf);
 200                 usb_ep_free_request(f_fb->out_ep, f_fb->out_req);
 201                 f_fb->out_req = NULL;
 202         }
 203         if (f_fb->in_req) {
 204                 free(f_fb->in_req->buf);
 205                 usb_ep_free_request(f_fb->in_ep, f_fb->in_req);
 206                 f_fb->in_req = NULL;
 207         }
 208 }
 209
 210 static struct usb_request *fastboot_start_ep(struct usb_ep *ep)
 211 {
 212         struct usb_request *req;
 213
 214         req = usb_ep_alloc_request(ep, 0);
 215         if (!req)
 216                 return NULL;
 217
 218         req->length = EP_BUFFER_SIZE;
 219         req->buf = memalign(CONFIG_SYS_CACHELINE_SIZE, EP_BUFFER_SIZE);
 220         if (!req->buf) {
 221                 usb_ep_free_request(ep, req);
 222                 return NULL;
 223         }
 224
 225         memset(req->buf, 0, req->length);
 226         return req;
 227 }
 228
 229 static int fastboot_set_alt(struct usb_function *f,
 230                             unsigned interface, unsigned alt)
 231 {
 232         int ret;
 233         struct usb_composite_dev *cdev = f->config->cdev;
 234         struct usb_gadget *gadget = cdev->gadget;
 235         struct f_fastboot *f_fb = func_to_fastboot(f);
 236
 237         debug("%s: func: %s intf: %d alt: %d\n",
 238               __func__, f->name, interface, alt);
 239
 240         /* make sure we don't enable the ep twice */
 241         if (gadget->speed == USB_SPEED_HIGH) {
 242                 ret = usb_ep_enable(f_fb->out_ep, &hs_ep_out);
 243                 is_high_speed = true;
 244         } else {
 245                 ret = usb_ep_enable(f_fb->out_ep, &fs_ep_out);
 246                 is_high_speed = false;
 247         }
 248         if (ret) {
 249                 puts("failed to enable out ep\n");
 250                 return ret;
 251         }
 252
 253         f_fb->out_req = fastboot_start_ep(f_fb->out_ep);
 254         if (!f_fb->out_req) {
 255                 puts("failed to alloc out req\n");
 256                 ret = -EINVAL;
 257                 goto err;
 258         }
 259         f_fb->out_req->complete = rx_handler_command;
 260
 261         ret = usb_ep_enable(f_fb->in_ep, &fs_ep_in);
 262         if (ret) {
 263                 puts("failed to enable in ep\n");
 264                 goto err;
 265         }
 266
 267         f_fb->in_req = fastboot_start_ep(f_fb->in_ep);
 268         if (!f_fb->in_req) {
 269                 puts("failed alloc req in\n");
 270                 ret = -EINVAL;
 271                 goto err;
 272         }
 273         f_fb->in_req->complete = fastboot_complete;
 274
 275         ret = usb_ep_queue(f_fb->out_ep, f_fb->out_req, 0);
 276         if (ret)
 277                 goto err;
 278
 279         return 0;
 280 err:
 281         fastboot_disable(f);
 282         return ret;
 283 }
 284
 285 static int fastboot_add(struct usb_configuration *c)
 286 {
 287         struct f_fastboot *f_fb = fastboot_func;
 288         int status;
 289
 290         debug("%s: cdev: 0x%p\n", __func__, c->cdev);
 291
 292         if (!f_fb) {
 293                 f_fb = memalign(CONFIG_SYS_CACHELINE_SIZE, sizeof(*f_fb));
 294                 if (!f_fb)
 295                         return -ENOMEM;
 296
 297                 fastboot_func = f_fb;
 298                 memset(f_fb, 0, sizeof(*f_fb));
 299         }
 300
 301         f_fb->usb_function.name = "f_fastboot";
 302         f_fb->usb_function.hs_descriptors = fb_runtime_descs;
 303         f_fb->usb_function.bind = fastboot_bind;
 304         f_fb->usb_function.unbind = fastboot_unbind;
 305         f_fb->usb_function.set_alt = fastboot_set_alt;
 306         f_fb->usb_function.disable = fastboot_disable;
 307         f_fb->usb_function.strings = fastboot_strings;
 308
 309         status = usb_add_function(c, &f_fb->usb_function);
 310         if (status) {
 311                 free(f_fb);
 312                 fastboot_func = f_fb;
 313         }
 314
 315         return status;
 316 }
 317 DECLARE_GADGET_BIND_CALLBACK(usb_dnl_fastboot, fastboot_add);
 318
 319 static int fastboot_tx_write(const char *buffer, unsigned int buffer_size)
 320 {
 321         struct usb_request *in_req = fastboot_func->in_req;
 322         int ret;
 323
 324         memcpy(in_req->buf, buffer, buffer_size);
 325         in_req->length = buffer_size;
 326
 327         usb_ep_dequeue(fastboot_func->in_ep, in_req);
 328
 329         ret = usb_ep_queue(fastboot_func->in_ep, in_req, 0);
 330         if (ret)
 331                 printf("Error %d on queue\n", ret);
 332         return 0;
 333 }
 334
 335 static int fastboot_tx_write_str(const char *buffer)
 336 {
 337         return fastboot_tx_write(buffer, strlen(buffer));
 338 }
 339
 340 static void compl_do_reset(struct usb_ep *ep, struct usb_request *req)
 341 {
 342         do_reset(NULL, 0, 0, NULL);
 343 }
 344
 345 int __weak fb_set_reboot_flag(void)
 346 {
 347         return -ENOSYS;
 348 }
 349
 350 static void cb_reboot(struct usb_ep *ep, struct usb_request *req)
 351 {
 352         char *cmd = req->buf;
 353         if (!strcmp_l1("reboot-bootloader", cmd)) {
 354                 if (fb_set_reboot_flag()) {
 355                         fastboot_tx_write_str("FAILCannot set reboot flag");
 356                         return;
 357                 }
 358         }
 359         fastboot_func->in_req->complete = compl_do_reset;
 360         fastboot_tx_write_str("OKAY");
 361 }
 362
 363 static int strcmp_l1(const char *s1, const char *s2)
 364 {
 365         if (!s1 || !s2)
 366                 return -1;
 367         return strncmp(s1, s2, strlen(s1));
 368 }
 369
 370 static void cb_getvar(struct usb_ep *ep, struct usb_request *req)
 371 {
 372         char *cmd = req->buf;
 373         char response[FASTBOOT_RESPONSE_LEN];
 374         const char *s;
 375         size_t chars_left;
 376
 377         strcpy(response, "OKAY");
 378         chars_left = sizeof(response) - strlen(response) - 1;
 379
 380         strsep(&cmd, ":");
 381         if (!cmd) {
 382                 error("missing variable\n");
 383                 fastboot_tx_write_str("FAILmissing var");
 384                 return;
 385         }
 386
 387         if (!strcmp_l1("version", cmd)) {
 388                 strncat(response, FASTBOOT_VERSION, chars_left);
 389         } else if (!strcmp_l1("bootloader-version", cmd)) {
 390                 strncat(response, U_BOOT_VERSION, chars_left);
 391         } else if (!strcmp_l1("downloadsize", cmd) ||
 392                 !strcmp_l1("max-download-size", cmd)) {
 393                 char str_num[12];
 394
 395                 sprintf(str_num, "0x%08x", CONFIG_FASTBOOT_BUF_SIZE);
 396                 strncat(response, str_num, chars_left);
 397
 398                 /*
 399                  * This also indicates the start of a new flashing
 400                  * "session", in which we could have 1-N buffers to
 401                  * write to a partition.
 402                  *
 403                  * Reset our session counter.
 404                  */
 405                 fastboot_flash_session_id = 0;
 406         } else if (!strcmp_l1("serialno", cmd)) {
 407                 s = getenv("serial#");
 408                 if (s)
 409                         strncat(response, s, chars_left);
 410                 else
 411                         strcpy(response, "FAILValue not set");
 412         } else {
 413                 error("unknown variable: %s\n", cmd);
 414                 strcpy(response, "FAILVariable not implemented");
 415         }
 416         fastboot_tx_write_str(response);
 417 }
 418
 419 static unsigned int rx_bytes_expected(unsigned int maxpacket)
 420 {
 421         int rx_remain = download_size - download_bytes;
 422         int rem = 0;
 423         if (rx_remain < 0)
 424                 return 0;
 425         if (rx_remain > EP_BUFFER_SIZE)
 426                 return EP_BUFFER_SIZE;
 427         if (rx_remain < maxpacket) {
 428                 rx_remain = maxpacket;
 429         } else if (rx_remain % maxpacket != 0) {
 430                 rem = rx_remain % maxpacket;
 431                 rx_remain = rx_remain + (maxpacket - rem);
 432         }
 433         return rx_remain;
 434 }
 435
 436 #define BYTES_PER_DOT   0x20000
 437 static void rx_handler_dl_image(struct usb_ep *ep, struct usb_request *req)
 438 {
 439         char response[FASTBOOT_RESPONSE_LEN];
 440         unsigned int transfer_size = download_size - download_bytes;
 441         const unsigned char *buffer = req->buf;
 442         unsigned int buffer_size = req->actual;
 443         unsigned int pre_dot_num, now_dot_num;
 444         unsigned int max;
 445
 446         if (req->status != 0) {
 447                 printf("Bad status: %d\n", req->status);
 448                 return;
 449         }
 450
 451         if (buffer_size < transfer_size)
 452                 transfer_size = buffer_size;
 453
 454         memcpy((void *)CONFIG_FASTBOOT_BUF_ADDR + download_bytes,
 455                buffer, transfer_size);
 456
 457         pre_dot_num = download_bytes / BYTES_PER_DOT;
 458         download_bytes += transfer_size;
 459         now_dot_num = download_bytes / BYTES_PER_DOT;
 460
 461         if (pre_dot_num != now_dot_num) {
 462                 putc('.');
 463                 if (!(now_dot_num % 74))
 464                         putc('\n');
 465         }
 466
 467         /* Check if transfer is done */
 468         if (download_bytes >= download_size) {
 469                 /*
 470                  * Reset global transfer variable, keep download_bytes because
 471                  * it will be used in the next possible flashing command
 472                  */
 473                 download_size = 0;
 474                 req->complete = rx_handler_command;
 475                 req->length = EP_BUFFER_SIZE;
 476
 477                 sprintf(response, "OKAY");
 478                 fastboot_tx_write_str(response);
 479
 480                 printf("\ndownloading of %d bytes finished\n", download_bytes);
 481         } else {
 482                 max = is_high_speed ? hs_ep_out.wMaxPacketSize :
 483                                 fs_ep_out.wMaxPacketSize;
 484                 req->length = rx_bytes_expected(max);
 485                 if (req->length < ep->maxpacket)
 486                         req->length = ep->maxpacket;
 487         }
 488
 489         req->actual = 0;
 490         usb_ep_queue(ep, req, 0);
 491 }
 492
 493 static void cb_download(struct usb_ep *ep, struct usb_request *req)
 494 {
 495         char *cmd = req->buf;
 496         char response[FASTBOOT_RESPONSE_LEN];
 497         unsigned int max;
 498
 499         strsep(&cmd, ":");
 500         download_size = simple_strtoul(cmd, NULL, 16);
 501         download_bytes = 0;
 502
 503         printf("Starting download of %d bytes\n", download_size);
 504
 505         if (0 == download_size) {
 506                 sprintf(response, "FAILdata invalid size");
 507         } else if (download_size > CONFIG_FASTBOOT_BUF_SIZE) {
 508                 download_size = 0;
 509                 sprintf(response, "FAILdata too large");
 510         } else {
 511                 sprintf(response, "DATA%08x", download_size);
 512                 req->complete = rx_handler_dl_image;
 513                 max = is_high_speed ? hs_ep_out.wMaxPacketSize :
 514                         fs_ep_out.wMaxPacketSize;
 515                 req->length = rx_bytes_expected(max);
 516                 if (req->length < ep->maxpacket)
 517                         req->length = ep->maxpacket;
 518         }
 519         fastboot_tx_write_str(response);
 520 }
 521
 522 static void do_bootm_on_complete(struct usb_ep *ep, struct usb_request *req)
 523 {
 524         char boot_addr_start[12];
 525         char *bootm_args[] = { "bootm", boot_addr_start, NULL };
 526
 527         puts("Booting kernel..\n");
 528
 529         sprintf(boot_addr_start, "0x%lx", load_addr);
 530         do_bootm(NULL, 0, 2, bootm_args);
 531
 532         /* This only happens if image is somehow faulty so we start over */
 533         do_reset(NULL, 0, 0, NULL);
 534 }
 535
 536 static void cb_boot(struct usb_ep *ep, struct usb_request *req)
 537 {
 538         fastboot_func->in_req->complete = do_bootm_on_complete;
 539         fastboot_tx_write_str("OKAY");
 540 }
 541
 542 static void do_exit_on_complete(struct usb_ep *ep, struct usb_request *req)
 543 {
 544         g_dnl_trigger_detach();
 545 }
 546
 547 static void cb_continue(struct usb_ep *ep, struct usb_request *req)
 548 {
 549         fastboot_func->in_req->complete = do_exit_on_complete;
 550         fastboot_tx_write_str("OKAY");
 551 }
 552
 553 #ifdef CONFIG_FASTBOOT_FLASH
 554 static void cb_flash(struct usb_ep *ep, struct usb_request *req)
 555 {
 556         char *cmd = req->buf;
 557         char response[FASTBOOT_RESPONSE_LEN];
 558
 559         strsep(&cmd, ":");
 560         if (!cmd) {
 561                 error("missing partition name\n");
 562                 fastboot_tx_write_str("FAILmissing partition name");
 563                 return;
 564         }
 565
 566         strcpy(response, "FAILno flash device defined");
 567 #ifdef CONFIG_FASTBOOT_FLASH_MMC_DEV
 568         fb_mmc_flash_write(cmd, fastboot_flash_session_id,
 569                            (void *)CONFIG_FASTBOOT_BUF_ADDR,
 570                            download_bytes, response);
 571 #endif
 572         fastboot_flash_session_id++;
 573         fastboot_tx_write_str(response);
 574 }
 575 #endif
 576
 577 static void cb_oem(struct usb_ep *ep, struct usb_request *req)
 578 {
 579         char *cmd = req->buf;
 580 #ifdef CONFIG_FASTBOOT_FLASH_MMC_DEV
 581         if (strncmp("format", cmd + 4, 6) == 0) {
 582                 char cmdbuf[32];
 583                 sprintf(cmdbuf, "gpt write mmc %x $partitions",
 584                         CONFIG_FASTBOOT_FLASH_MMC_DEV);
 585                 if (run_command(cmdbuf, 0))
 586                         fastboot_tx_write_str("FAIL");
 587                 else
 588                         fastboot_tx_write_str("OKAY");
 589         } else
 590 #endif
 591         if (strncmp("unlock", cmd + 4, 8) == 0) {
 592                 fastboot_tx_write_str("FAILnot implemented");
 593         }
 594         else {
 595                 fastboot_tx_write_str("FAILunknown oem command");
 596         }
 597 }
 598
 599 #ifdef CONFIG_FASTBOOT_FLASH
 600 static void cb_erase(struct usb_ep *ep, struct usb_request *req)
 601 {
 602         char *cmd = req->buf;
 603         char response[FASTBOOT_RESPONSE_LEN];
 604
 605         strsep(&cmd, ":");
 606         if (!cmd) {
 607                 error("missing partition name");
 608                 fastboot_tx_write_str("FAILmissing partition name");
 609                 return;
 610         }
 611
 612         strcpy(response, "FAILno flash device defined");
 613
 614 #ifdef CONFIG_FASTBOOT_FLASH_MMC_DEV
 615         fb_mmc_erase(cmd, response);
 616 #endif
 617         fastboot_tx_write_str(response);
 618 }
 619 #endif
 620
 621 struct cmd_dispatch_info {
 622         char *cmd;
 623         void (*cb)(struct usb_ep *ep, struct usb_request *req);
 624 };
 625
 626 static const struct cmd_dispatch_info cmd_dispatch_info[] = {
 627         {
 628                 .cmd = "reboot",
 629                 .cb = cb_reboot,
 630         }, {
 631                 .cmd = "getvar:",
 632                 .cb = cb_getvar,
 633         }, {
 634                 .cmd = "download:",
 635                 .cb = cb_download,
 636         }, {
 637                 .cmd = "boot",
 638                 .cb = cb_boot,
 639         }, {
 640                 .cmd = "continue",
 641                 .cb = cb_continue,
 642         },
 643 #ifdef CONFIG_FASTBOOT_FLASH
 644         {
 645                 .cmd = "flash",
 646                 .cb = cb_flash,
 647         }, {
 648                 .cmd = "erase",
 649                 .cb = cb_erase,
 650         },
 651 #endif
 652         {
 653                 .cmd = "oem",
 654                 .cb = cb_oem,
 655         },
 656 };
 657
 658 static void rx_handler_command(struct usb_ep *ep, struct usb_request *req)
 659 {
 660         char *cmdbuf = req->buf;
 661         void (*func_cb)(struct usb_ep *ep, struct usb_request *req) = NULL;
 662         int i;
 663
 664         if (req->status != 0 || req->length == 0)
 665                 return;
 666
 667         for (i = 0; i < ARRAY_SIZE(cmd_dispatch_info); i++) {
 668                 if (!strcmp_l1(cmd_dispatch_info[i].cmd, cmdbuf)) {
 669                         func_cb = cmd_dispatch_info[i].cb;
 670                         break;
 671                 }
 672         }
 673
 674         if (!func_cb) {
 675                 error("unknown command: %s\n", cmdbuf);
 676                 fastboot_tx_write_str("FAILunknown command");
 677         } else {
 678                 if (req->actual < req->length) {
 679                         u8 *buf = (u8 *)req->buf;
 680                         buf[req->actual] = 0;
 681                         func_cb(ep, req);
 682                 } else {
 683                         error("buffer overflow\n");
 684                         fastboot_tx_write_str("FAILbuffer overflow");
 685                 }
 686         }
 687
 688         *cmdbuf = '\0';
 689         req->actual = 0;
 690         usb_ep_queue(ep, req, 0);
 691 }