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 fastboot_flash_session_id;
  63 static unsigned int download_size;
  64 static unsigned int download_bytes;
  65
  66 static struct usb_endpoint_descriptor fs_ep_in = {
  67         .bLength            = USB_DT_ENDPOINT_SIZE,
  68         .bDescriptorType    = USB_DT_ENDPOINT,
  69         .bEndpointAddress   = USB_DIR_IN,
  70         .bmAttributes       = USB_ENDPOINT_XFER_BULK,
  71         .wMaxPacketSize     = cpu_to_le16(64),
  72 };
  73
  74 static struct usb_endpoint_descriptor fs_ep_out = {
  75         .bLength                = USB_DT_ENDPOINT_SIZE,
  76         .bDescriptorType        = USB_DT_ENDPOINT,
  77         .bEndpointAddress       = USB_DIR_OUT,
  78         .bmAttributes           = USB_ENDPOINT_XFER_BULK,
  79         .wMaxPacketSize         = cpu_to_le16(64),
  80 };
  81
  82 static struct usb_endpoint_descriptor hs_ep_in = {
  83         .bLength                = USB_DT_ENDPOINT_SIZE,
  84         .bDescriptorType        = USB_DT_ENDPOINT,
  85         .bEndpointAddress       = USB_DIR_IN,
  86         .bmAttributes           = USB_ENDPOINT_XFER_BULK,
  87         .wMaxPacketSize         = cpu_to_le16(512),
  88 };
  89
  90 static struct usb_endpoint_descriptor hs_ep_out = {
  91         .bLength                = USB_DT_ENDPOINT_SIZE,
  92         .bDescriptorType        = USB_DT_ENDPOINT,
  93         .bEndpointAddress       = USB_DIR_OUT,
  94         .bmAttributes           = USB_ENDPOINT_XFER_BULK,
  95         .wMaxPacketSize         = cpu_to_le16(512),
  96 };
  97
  98 static struct usb_interface_descriptor interface_desc = {
  99         .bLength                = USB_DT_INTERFACE_SIZE,
 100         .bDescriptorType        = USB_DT_INTERFACE,
 101         .bInterfaceNumber       = 0x00,
 102         .bAlternateSetting      = 0x00,
 103         .bNumEndpoints          = 0x02,
 104         .bInterfaceClass        = FASTBOOT_INTERFACE_CLASS,
 105         .bInterfaceSubClass     = FASTBOOT_INTERFACE_SUB_CLASS,
 106         .bInterfaceProtocol     = FASTBOOT_INTERFACE_PROTOCOL,
 107 };
 108
 109 static struct usb_descriptor_header *fb_fs_function[] = {
 110         (struct usb_descriptor_header *)&interface_desc,
 111         (struct usb_descriptor_header *)&fs_ep_in,
 112         (struct usb_descriptor_header *)&fs_ep_out,
 113 };
 114
 115 static struct usb_descriptor_header *fb_hs_function[] = {
 116         (struct usb_descriptor_header *)&interface_desc,
 117         (struct usb_descriptor_header *)&hs_ep_in,
 118         (struct usb_descriptor_header *)&hs_ep_out,
 119         NULL,
 120 };
 121
 122 static struct usb_endpoint_descriptor *
 123 fb_ep_desc(struct usb_gadget *g, struct usb_endpoint_descriptor *fs,
 124             struct usb_endpoint_descriptor *hs)
 125 {
 126         if (gadget_is_dualspeed(g) && g->speed == USB_SPEED_HIGH)
 127                 return hs;
 128         return fs;
 129 }
 130
 131 /*
 132  * static strings, in UTF-8
 133  */
 134 static const char fastboot_name[] = "Android Fastboot";
 135
 136 static struct usb_string fastboot_string_defs[] = {
 137         [0].s = fastboot_name,
 138         {  }                    /* end of list */
 139 };
 140
 141 static struct usb_gadget_strings stringtab_fastboot = {
 142         .language       = 0x0409,       /* en-us */
 143         .strings        = fastboot_string_defs,
 144 };
 145
 146 static struct usb_gadget_strings *fastboot_strings[] = {
 147         &stringtab_fastboot,
 148         NULL,
 149 };
 150
 151 static void rx_handler_command(struct usb_ep *ep, struct usb_request *req);
 152 static int strcmp_l1(const char *s1, const char *s2);
 153
 154
 155 void fastboot_fail(char *response, const char *reason)
 156 {
 157         strncpy(response, "FAIL\0", 5);
 158         strncat(response, reason, FASTBOOT_RESPONSE_LEN - 4 - 1);
 159 }
 160
 161 void fastboot_okay(char *response, const char *reason)
 162 {
 163         strncpy(response, "OKAY\0", 5);
 164         strncat(response, reason, FASTBOOT_RESPONSE_LEN - 4 - 1);
 165 }
 166
 167 static void fastboot_complete(struct usb_ep *ep, struct usb_request *req)
 168 {
 169         int status = req->status;
 170         if (!status)
 171                 return;
 172         printf("status: %d ep '%s' trans: %d\n", status, ep->name, req->actual);
 173 }
 174
 175 static int fastboot_bind(struct usb_configuration *c, struct usb_function *f)
 176 {
 177         int id;
 178         struct usb_gadget *gadget = c->cdev->gadget;
 179         struct f_fastboot *f_fb = func_to_fastboot(f);
 180         const char *s;
 181
 182         /* DYNAMIC interface numbers assignments */
 183         id = usb_interface_id(c, f);
 184         if (id < 0)
 185                 return id;
 186         interface_desc.bInterfaceNumber = id;
 187
 188         id = usb_string_id(c->cdev);
 189         if (id < 0)
 190                 return id;
 191         fastboot_string_defs[0].id = id;
 192         interface_desc.iInterface = id;
 193
 194         f_fb->in_ep = usb_ep_autoconfig(gadget, &fs_ep_in);
 195         if (!f_fb->in_ep)
 196                 return -ENODEV;
 197         f_fb->in_ep->driver_data = c->cdev;
 198
 199         f_fb->out_ep = usb_ep_autoconfig(gadget, &fs_ep_out);
 200         if (!f_fb->out_ep)
 201                 return -ENODEV;
 202         f_fb->out_ep->driver_data = c->cdev;
 203
 204         f->descriptors = fb_fs_function;
 205
 206         if (gadget_is_dualspeed(gadget)) {
 207                 /* Assume endpoint addresses are the same for both speeds */
 208                 hs_ep_in.bEndpointAddress = fs_ep_in.bEndpointAddress;
 209                 hs_ep_out.bEndpointAddress = fs_ep_out.bEndpointAddress;
 210                 /* copy HS descriptors */
 211                 f->hs_descriptors = fb_hs_function;
 212         }
 213
 214         s = getenv("serial#");
 215         if (s)
 216                 g_dnl_set_serialnumber((char *)s);
 217
 218         return 0;
 219 }
 220
 221 static void fastboot_unbind(struct usb_configuration *c, struct usb_function *f)
 222 {
 223         memset(fastboot_func, 0, sizeof(*fastboot_func));
 224 }
 225
 226 static void fastboot_disable(struct usb_function *f)
 227 {
 228         struct f_fastboot *f_fb = func_to_fastboot(f);
 229
 230         usb_ep_disable(f_fb->out_ep);
 231         usb_ep_disable(f_fb->in_ep);
 232
 233         if (f_fb->out_req) {
 234                 free(f_fb->out_req->buf);
 235                 usb_ep_free_request(f_fb->out_ep, f_fb->out_req);
 236                 f_fb->out_req = NULL;
 237         }
 238         if (f_fb->in_req) {
 239                 free(f_fb->in_req->buf);
 240                 usb_ep_free_request(f_fb->in_ep, f_fb->in_req);
 241                 f_fb->in_req = NULL;
 242         }
 243 }
 244
 245 static struct usb_request *fastboot_start_ep(struct usb_ep *ep)
 246 {
 247         struct usb_request *req;
 248
 249         req = usb_ep_alloc_request(ep, 0);
 250         if (!req)
 251                 return NULL;
 252
 253         req->length = EP_BUFFER_SIZE;
 254         req->buf = memalign(CONFIG_SYS_CACHELINE_SIZE, EP_BUFFER_SIZE);
 255         if (!req->buf) {
 256                 usb_ep_free_request(ep, req);
 257                 return NULL;
 258         }
 259
 260         memset(req->buf, 0, req->length);
 261         return req;
 262 }
 263
 264 static int fastboot_set_alt(struct usb_function *f,
 265                             unsigned interface, unsigned alt)
 266 {
 267         int ret;
 268         struct usb_composite_dev *cdev = f->config->cdev;
 269         struct usb_gadget *gadget = cdev->gadget;
 270         struct f_fastboot *f_fb = func_to_fastboot(f);
 271         const struct usb_endpoint_descriptor *d;
 272
 273         debug("%s: func: %s intf: %d alt: %d\n",
 274               __func__, f->name, interface, alt);
 275
 276         d = fb_ep_desc(gadget, &fs_ep_out, &hs_ep_out);
 277         ret = usb_ep_enable(f_fb->out_ep, d);
 278         if (ret) {
 279                 puts("failed to enable out ep\n");
 280                 return ret;
 281         }
 282
 283         f_fb->out_req = fastboot_start_ep(f_fb->out_ep);
 284         if (!f_fb->out_req) {
 285                 puts("failed to alloc out req\n");
 286                 ret = -EINVAL;
 287                 goto err;
 288         }
 289         f_fb->out_req->complete = rx_handler_command;
 290
 291         d = fb_ep_desc(gadget, &fs_ep_in, &hs_ep_in);
 292         ret = usb_ep_enable(f_fb->in_ep, d);
 293         if (ret) {
 294                 puts("failed to enable in ep\n");
 295                 goto err;
 296         }
 297
 298         f_fb->in_req = fastboot_start_ep(f_fb->in_ep);
 299         if (!f_fb->in_req) {
 300                 puts("failed alloc req in\n");
 301                 ret = -EINVAL;
 302                 goto err;
 303         }
 304         f_fb->in_req->complete = fastboot_complete;
 305
 306         ret = usb_ep_queue(f_fb->out_ep, f_fb->out_req, 0);
 307         if (ret)
 308                 goto err;
 309
 310         return 0;
 311 err:
 312         fastboot_disable(f);
 313         return ret;
 314 }
 315
 316 static int fastboot_add(struct usb_configuration *c)
 317 {
 318         struct f_fastboot *f_fb = fastboot_func;
 319         int status;
 320
 321         debug("%s: cdev: 0x%p\n", __func__, c->cdev);
 322
 323         if (!f_fb) {
 324                 f_fb = memalign(CONFIG_SYS_CACHELINE_SIZE, sizeof(*f_fb));
 325                 if (!f_fb)
 326                         return -ENOMEM;
 327
 328                 fastboot_func = f_fb;
 329                 memset(f_fb, 0, sizeof(*f_fb));
 330         }
 331
 332         f_fb->usb_function.name = "f_fastboot";
 333         f_fb->usb_function.bind = fastboot_bind;
 334         f_fb->usb_function.unbind = fastboot_unbind;
 335         f_fb->usb_function.set_alt = fastboot_set_alt;
 336         f_fb->usb_function.disable = fastboot_disable;
 337         f_fb->usb_function.strings = fastboot_strings;
 338
 339         status = usb_add_function(c, &f_fb->usb_function);
 340         if (status) {
 341                 free(f_fb);
 342                 fastboot_func = f_fb;
 343         }
 344
 345         return status;
 346 }
 347 DECLARE_GADGET_BIND_CALLBACK(usb_dnl_fastboot, fastboot_add);
 348
 349 static int fastboot_tx_write(const char *buffer, unsigned int buffer_size)
 350 {
 351         struct usb_request *in_req = fastboot_func->in_req;
 352         int ret;
 353
 354         memcpy(in_req->buf, buffer, buffer_size);
 355         in_req->length = buffer_size;
 356
 357         usb_ep_dequeue(fastboot_func->in_ep, in_req);
 358
 359         ret = usb_ep_queue(fastboot_func->in_ep, in_req, 0);
 360         if (ret)
 361                 printf("Error %d on queue\n", ret);
 362         return 0;
 363 }
 364
 365 static int fastboot_tx_write_str(const char *buffer)
 366 {
 367         return fastboot_tx_write(buffer, strlen(buffer));
 368 }
 369
 370 static void compl_do_reset(struct usb_ep *ep, struct usb_request *req)
 371 {
 372         do_reset(NULL, 0, 0, NULL);
 373 }
 374
 375 int __weak fb_set_reboot_flag(void)
 376 {
 377         return -ENOSYS;
 378 }
 379
 380 static void cb_reboot(struct usb_ep *ep, struct usb_request *req)
 381 {
 382         char *cmd = req->buf;
 383         if (!strcmp_l1("reboot-bootloader", cmd)) {
 384                 if (fb_set_reboot_flag()) {
 385                         fastboot_tx_write_str("FAILCannot set reboot flag");
 386                         return;
 387                 }
 388         }
 389         fastboot_func->in_req->complete = compl_do_reset;
 390         fastboot_tx_write_str("OKAY");
 391 }
 392
 393 static int strcmp_l1(const char *s1, const char *s2)
 394 {
 395         if (!s1 || !s2)
 396                 return -1;
 397         return strncmp(s1, s2, strlen(s1));
 398 }
 399
 400 static void cb_getvar(struct usb_ep *ep, struct usb_request *req)
 401 {
 402         char *cmd = req->buf;
 403         char response[FASTBOOT_RESPONSE_LEN];
 404         const char *s;
 405         size_t chars_left;
 406
 407         strcpy(response, "OKAY");
 408         chars_left = sizeof(response) - strlen(response) - 1;
 409
 410         strsep(&cmd, ":");
 411         if (!cmd) {
 412                 error("missing variable");
 413                 fastboot_tx_write_str("FAILmissing var");
 414                 return;
 415         }
 416
 417         if (!strcmp_l1("version", cmd)) {
 418                 strncat(response, FASTBOOT_VERSION, chars_left);
 419         } else if (!strcmp_l1("bootloader-version", cmd)) {
 420                 strncat(response, U_BOOT_VERSION, chars_left);
 421         } else if (!strcmp_l1("downloadsize", cmd) ||
 422                 !strcmp_l1("max-download-size", cmd)) {
 423                 char str_num[12];
 424
 425                 sprintf(str_num, "0x%08x", CONFIG_FASTBOOT_BUF_SIZE);
 426                 strncat(response, str_num, chars_left);
 427
 428                 /*
 429                  * This also indicates the start of a new flashing
 430                  * "session", in which we could have 1-N buffers to
 431                  * write to a partition.
 432                  *
 433                  * Reset our session counter.
 434                  */
 435                 fastboot_flash_session_id = 0;
 436         } else if (!strcmp_l1("serialno", cmd)) {
 437                 s = getenv("serial#");
 438                 if (s)
 439                         strncat(response, s, chars_left);
 440                 else
 441                         strcpy(response, "FAILValue not set");
 442         } else {
 443                 char envstr[32];
 444
 445                 snprintf(envstr, sizeof(envstr) - 1, "fastboot.%s", cmd);
 446                 s = getenv(envstr);
 447                 if (s) {
 448                         strncat(response, s, chars_left);
 449                 } else {
 450                         printf("WARNING: unknown variable: %s\n", cmd);
 451                         strcpy(response, "FAILVariable not implemented");
 452                 }
 453         }
 454         fastboot_tx_write_str(response);
 455 }
 456
 457 static unsigned int rx_bytes_expected(struct usb_ep *ep)
 458 {
 459         int rx_remain = download_size - download_bytes;
 460         unsigned int rem;
 461         unsigned int maxpacket = ep->maxpacket;
 462
 463         if (rx_remain <= 0)
 464                 return 0;
 465         else if (rx_remain > EP_BUFFER_SIZE)
 466                 return EP_BUFFER_SIZE;
 467
 468         /*
 469          * Some controllers e.g. DWC3 don't like OUT transfers to be
 470          * not ending in maxpacket boundary. So just make them happy by
 471          * always requesting for integral multiple of maxpackets.
 472          * This shouldn't bother controllers that don't care about it.
 473          */
 474         rem = rx_remain % maxpacket;
 475         if (rem > 0)
 476                 rx_remain = rx_remain + (maxpacket - rem);
 477
 478         return rx_remain;
 479 }
 480
 481 #define BYTES_PER_DOT   0x20000
 482 static void rx_handler_dl_image(struct usb_ep *ep, struct usb_request *req)
 483 {
 484         char response[FASTBOOT_RESPONSE_LEN];
 485         unsigned int transfer_size = download_size - download_bytes;
 486         const unsigned char *buffer = req->buf;
 487         unsigned int buffer_size = req->actual;
 488         unsigned int pre_dot_num, now_dot_num;
 489
 490         if (req->status != 0) {
 491                 printf("Bad status: %d\n", req->status);
 492                 return;
 493         }
 494
 495         if (buffer_size < transfer_size)
 496                 transfer_size = buffer_size;
 497
 498         memcpy((void *)CONFIG_FASTBOOT_BUF_ADDR + download_bytes,
 499                buffer, transfer_size);
 500
 501         pre_dot_num = download_bytes / BYTES_PER_DOT;
 502         download_bytes += transfer_size;
 503         now_dot_num = download_bytes / BYTES_PER_DOT;
 504
 505         if (pre_dot_num != now_dot_num) {
 506                 putc('.');
 507                 if (!(now_dot_num % 74))
 508                         putc('\n');
 509         }
 510
 511         /* Check if transfer is done */
 512         if (download_bytes >= download_size) {
 513                 /*
 514                  * Reset global transfer variable, keep download_bytes because
 515                  * it will be used in the next possible flashing command
 516                  */
 517                 download_size = 0;
 518                 req->complete = rx_handler_command;
 519                 req->length = EP_BUFFER_SIZE;
 520
 521                 strcpy(response, "OKAY");
 522                 fastboot_tx_write_str(response);
 523
 524                 printf("\ndownloading of %d bytes finished\n", download_bytes);
 525         } else {
 526                 req->length = rx_bytes_expected(ep);
 527         }
 528
 529         req->actual = 0;
 530         usb_ep_queue(ep, req, 0);
 531 }
 532
 533 static void cb_download(struct usb_ep *ep, struct usb_request *req)
 534 {
 535         char *cmd = req->buf;
 536         char response[FASTBOOT_RESPONSE_LEN];
 537
 538         strsep(&cmd, ":");
 539         download_size = simple_strtoul(cmd, NULL, 16);
 540         download_bytes = 0;
 541
 542         printf("Starting download of %d bytes\n", download_size);
 543
 544         if (0 == download_size) {
 545                 strcpy(response, "FAILdata invalid size");
 546         } else if (download_size > CONFIG_FASTBOOT_BUF_SIZE) {
 547                 download_size = 0;
 548                 strcpy(response, "FAILdata too large");
 549         } else {
 550                 sprintf(response, "DATA%08x", download_size);
 551                 req->complete = rx_handler_dl_image;
 552                 req->length = rx_bytes_expected(ep);
 553         }
 554         fastboot_tx_write_str(response);
 555 }
 556
 557 static void do_bootm_on_complete(struct usb_ep *ep, struct usb_request *req)
 558 {
 559         char boot_addr_start[12];
 560         char *bootm_args[] = { "bootm", boot_addr_start, NULL };
 561
 562         puts("Booting kernel..\n");
 563
 564         sprintf(boot_addr_start, "0x%lx", load_addr);
 565         do_bootm(NULL, 0, 2, bootm_args);
 566
 567         /* This only happens if image is somehow faulty so we start over */
 568         do_reset(NULL, 0, 0, NULL);
 569 }
 570
 571 static void cb_boot(struct usb_ep *ep, struct usb_request *req)
 572 {
 573         fastboot_func->in_req->complete = do_bootm_on_complete;
 574         fastboot_tx_write_str("OKAY");
 575 }
 576
 577 static void do_exit_on_complete(struct usb_ep *ep, struct usb_request *req)
 578 {
 579         g_dnl_trigger_detach();
 580 }
 581
 582 static void cb_continue(struct usb_ep *ep, struct usb_request *req)
 583 {
 584         fastboot_func->in_req->complete = do_exit_on_complete;
 585         fastboot_tx_write_str("OKAY");
 586 }
 587
 588 #ifdef CONFIG_FASTBOOT_FLASH
 589 static void cb_flash(struct usb_ep *ep, struct usb_request *req)
 590 {
 591         char *cmd = req->buf;
 592         char response[FASTBOOT_RESPONSE_LEN];
 593
 594         strsep(&cmd, ":");
 595         if (!cmd) {
 596                 error("missing partition name");
 597                 fastboot_tx_write_str("FAILmissing partition name");
 598                 return;
 599         }
 600
 601         strcpy(response, "FAILno flash device defined");
 602 #ifdef CONFIG_FASTBOOT_FLASH_MMC_DEV
 603         fb_mmc_flash_write(cmd, fastboot_flash_session_id,
 604                            (void *)CONFIG_FASTBOOT_BUF_ADDR,
 605                            download_bytes, response);
 606 #endif
 607 #ifdef CONFIG_FASTBOOT_FLASH_NAND_DEV
 608         fb_nand_flash_write(cmd, fastboot_flash_session_id,
 609                             (void *)CONFIG_FASTBOOT_BUF_ADDR,
 610                             download_bytes, response);
 611 #endif
 612         fastboot_flash_session_id++;
 613         fastboot_tx_write_str(response);
 614 }
 615 #endif
 616
 617 static void cb_oem(struct usb_ep *ep, struct usb_request *req)
 618 {
 619         char *cmd = req->buf;
 620 #ifdef CONFIG_FASTBOOT_FLASH_MMC_DEV
 621         if (strncmp("format", cmd + 4, 6) == 0) {
 622                 char cmdbuf[32];
 623                 sprintf(cmdbuf, "gpt write mmc %x $partitions",
 624                         CONFIG_FASTBOOT_FLASH_MMC_DEV);
 625                 if (run_command(cmdbuf, 0))
 626                         fastboot_tx_write_str("FAIL");
 627                 else
 628                         fastboot_tx_write_str("OKAY");
 629         } else
 630 #endif
 631         if (strncmp("unlock", cmd + 4, 8) == 0) {
 632                 fastboot_tx_write_str("FAILnot implemented");
 633         }
 634         else {
 635                 fastboot_tx_write_str("FAILunknown oem command");
 636         }
 637 }
 638
 639 #ifdef CONFIG_FASTBOOT_FLASH
 640 static void cb_erase(struct usb_ep *ep, struct usb_request *req)
 641 {
 642         char *cmd = req->buf;
 643         char response[FASTBOOT_RESPONSE_LEN];
 644
 645         strsep(&cmd, ":");
 646         if (!cmd) {
 647                 error("missing partition name");
 648                 fastboot_tx_write_str("FAILmissing partition name");
 649                 return;
 650         }
 651
 652         strcpy(response, "FAILno flash device defined");
 653
 654 #ifdef CONFIG_FASTBOOT_FLASH_MMC_DEV
 655         fb_mmc_erase(cmd, response);
 656 #endif
 657 #ifdef CONFIG_FASTBOOT_FLASH_NAND_DEV
 658         fb_nand_erase(cmd, response);
 659 #endif
 660         fastboot_tx_write_str(response);
 661 }
 662 #endif
 663
 664 struct cmd_dispatch_info {
 665         char *cmd;
 666         void (*cb)(struct usb_ep *ep, struct usb_request *req);
 667 };
 668
 669 static const struct cmd_dispatch_info cmd_dispatch_info[] = {
 670         {
 671                 .cmd = "reboot",
 672                 .cb = cb_reboot,
 673         }, {
 674                 .cmd = "getvar:",
 675                 .cb = cb_getvar,
 676         }, {
 677                 .cmd = "download:",
 678                 .cb = cb_download,
 679         }, {
 680                 .cmd = "boot",
 681                 .cb = cb_boot,
 682         }, {
 683                 .cmd = "continue",
 684                 .cb = cb_continue,
 685         },
 686 #ifdef CONFIG_FASTBOOT_FLASH
 687         {
 688                 .cmd = "flash",
 689                 .cb = cb_flash,
 690         }, {
 691                 .cmd = "erase",
 692                 .cb = cb_erase,
 693         },
 694 #endif
 695         {
 696                 .cmd = "oem",
 697                 .cb = cb_oem,
 698         },
 699 };
 700
 701 static void rx_handler_command(struct usb_ep *ep, struct usb_request *req)
 702 {
 703         char *cmdbuf = req->buf;
 704         void (*func_cb)(struct usb_ep *ep, struct usb_request *req) = NULL;
 705         int i;
 706
 707         if (req->status != 0 || req->length == 0)
 708                 return;
 709
 710         for (i = 0; i < ARRAY_SIZE(cmd_dispatch_info); i++) {
 711                 if (!strcmp_l1(cmd_dispatch_info[i].cmd, cmdbuf)) {
 712                         func_cb = cmd_dispatch_info[i].cb;
 713                         break;
 714                 }
 715         }
 716
 717         if (!func_cb) {
 718                 error("unknown command: %s", cmdbuf);
 719                 fastboot_tx_write_str("FAILunknown command");
 720         } else {
 721                 if (req->actual < req->length) {
 722                         u8 *buf = (u8 *)req->buf;
 723                         buf[req->actual] = 0;
 724                         func_cb(ep, req);
 725                 } else {
 726                         error("buffer overflow");
 727                         fastboot_tx_write_str("FAILbuffer overflow");
 728                 }
 729         }
 730
 731         *cmdbuf = '\0';
 732         req->actual = 0;
 733         usb_ep_queue(ep, req, 0);
 734 }