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