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     = 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 }