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 static struct usb_endpoint_descriptor *
 119 fb_ep_desc(struct usb_gadget *g, struct usb_endpoint_descriptor *fs,
 120             struct usb_endpoint_descriptor *hs)
 121 {
 122         if (gadget_is_dualspeed(g) && g->speed == USB_SPEED_HIGH)
 123                 return hs;
 124         return fs;
 125 }
 126
 127 /*
 128  * static strings, in UTF-8
 129  */
 130 static const char fastboot_name[] = "Android Fastboot";
 131
 132 static struct usb_string fastboot_string_defs[] = {
 133         [0].s = fastboot_name,
 134         {  }                    /* end of list */
 135 };
 136
 137 static struct usb_gadget_strings stringtab_fastboot = {
 138         .language       = 0x0409,       /* en-us */
 139         .strings        = fastboot_string_defs,
 140 };
 141
 142 static struct usb_gadget_strings *fastboot_strings[] = {
 143         &stringtab_fastboot,
 144         NULL,
 145 };
 146
 147 static void rx_handler_command(struct usb_ep *ep, struct usb_request *req);
 148 static int strcmp_l1(const char *s1, const char *s2);
 149
 150
 151 void fastboot_fail(char *response, const char *reason)
 152 {
 153         strncpy(response, "FAIL\0", 5);
 154         strncat(response, reason, FASTBOOT_RESPONSE_LEN - 4 - 1);
 155 }
 156
 157 void fastboot_okay(char *response, const char *reason)
 158 {
 159         strncpy(response, "OKAY\0", 5);
 160         strncat(response, reason, FASTBOOT_RESPONSE_LEN - 4 - 1);
 161 }
 162
 163 static void fastboot_complete(struct usb_ep *ep, struct usb_request *req)
 164 {
 165         int status = req->status;
 166         if (!status)
 167                 return;
 168         printf("status: %d ep '%s' trans: %d\n", status, ep->name, req->actual);
 169 }
 170
 171 static int fastboot_bind(struct usb_configuration *c, struct usb_function *f)
 172 {
 173         int id;
 174         struct usb_gadget *gadget = c->cdev->gadget;
 175         struct f_fastboot *f_fb = func_to_fastboot(f);
 176         const char *s;
 177
 178         /* DYNAMIC interface numbers assignments */
 179         id = usb_interface_id(c, f);
 180         if (id < 0)
 181                 return id;
 182         interface_desc.bInterfaceNumber = id;
 183
 184         id = usb_string_id(c->cdev);
 185         if (id < 0)
 186                 return id;
 187         fastboot_string_defs[0].id = id;
 188         interface_desc.iInterface = id;
 189
 190         f_fb->in_ep = usb_ep_autoconfig(gadget, &fs_ep_in);
 191         if (!f_fb->in_ep)
 192                 return -ENODEV;
 193         f_fb->in_ep->driver_data = c->cdev;
 194
 195         f_fb->out_ep = usb_ep_autoconfig(gadget, &fs_ep_out);
 196         if (!f_fb->out_ep)
 197                 return -ENODEV;
 198         f_fb->out_ep->driver_data = c->cdev;
 199
 200         f->descriptors = fb_fs_function;
 201
 202         if (gadget_is_dualspeed(gadget)) {
 203                 /* Assume endpoint addresses are the same for both speeds */
 204                 hs_ep_in.bEndpointAddress = fs_ep_in.bEndpointAddress;
 205                 hs_ep_out.bEndpointAddress = fs_ep_out.bEndpointAddress;
 206                 /* copy HS descriptors */
 207                 f->hs_descriptors = fb_hs_function;
 208         }
 209
 210         s = getenv("serial#");
 211         if (s)
 212                 g_dnl_set_serialnumber((char *)s);
 213
 214         return 0;
 215 }
 216
 217 static void fastboot_unbind(struct usb_configuration *c, struct usb_function *f)
 218 {
 219         memset(fastboot_func, 0, sizeof(*fastboot_func));
 220 }
 221
 222 static void fastboot_disable(struct usb_function *f)
 223 {
 224         struct f_fastboot *f_fb = func_to_fastboot(f);
 225
 226         usb_ep_disable(f_fb->out_ep);
 227         usb_ep_disable(f_fb->in_ep);
 228
 229         if (f_fb->out_req) {
 230                 free(f_fb->out_req->buf);
 231                 usb_ep_free_request(f_fb->out_ep, f_fb->out_req);
 232                 f_fb->out_req = NULL;
 233         }
 234         if (f_fb->in_req) {
 235                 free(f_fb->in_req->buf);
 236                 usb_ep_free_request(f_fb->in_ep, f_fb->in_req);
 237                 f_fb->in_req = NULL;
 238         }
 239 }
 240
 241 static struct usb_request *fastboot_start_ep(struct usb_ep *ep)
 242 {
 243         struct usb_request *req;
 244
 245         req = usb_ep_alloc_request(ep, 0);
 246         if (!req)
 247                 return NULL;
 248
 249         req->length = EP_BUFFER_SIZE;
 250         req->buf = memalign(CONFIG_SYS_CACHELINE_SIZE, EP_BUFFER_SIZE);
 251         if (!req->buf) {
 252                 usb_ep_free_request(ep, req);
 253                 return NULL;
 254         }
 255
 256         memset(req->buf, 0, req->length);
 257         return req;
 258 }
 259
 260 static int fastboot_set_alt(struct usb_function *f,
 261                             unsigned interface, unsigned alt)
 262 {
 263         int ret;
 264         struct usb_composite_dev *cdev = f->config->cdev;
 265         struct usb_gadget *gadget = cdev->gadget;
 266         struct f_fastboot *f_fb = func_to_fastboot(f);
 267         const struct usb_endpoint_descriptor *d;
 268
 269         debug("%s: func: %s intf: %d alt: %d\n",
 270               __func__, f->name, interface, alt);
 271
 272         if (gadget->speed == USB_SPEED_HIGH)
 273                 is_high_speed = true;
 274         else
 275                 is_high_speed = false;
 276
 277         d = fb_ep_desc(gadget, &fs_ep_out, &hs_ep_out);
 278         ret = usb_ep_enable(f_fb->out_ep, d);
 279         if (ret) {
 280                 puts("failed to enable out ep\n");
 281                 return ret;
 282         }
 283
 284         f_fb->out_req = fastboot_start_ep(f_fb->out_ep);
 285         if (!f_fb->out_req) {
 286                 puts("failed to alloc out req\n");
 287                 ret = -EINVAL;
 288                 goto err;
 289         }
 290         f_fb->out_req->complete = rx_handler_command;
 291
 292         d = fb_ep_desc(gadget, &fs_ep_in, &hs_ep_in);
 293         ret = usb_ep_enable(f_fb->in_ep, d);
 294         if (ret) {
 295                 puts("failed to enable in ep\n");
 296                 goto err;
 297         }
 298
 299         f_fb->in_req = fastboot_start_ep(f_fb->in_ep);
 300         if (!f_fb->in_req) {
 301                 puts("failed alloc req in\n");
 302                 ret = -EINVAL;
 303                 goto err;
 304         }
 305         f_fb->in_req->complete = fastboot_complete;
 306
 307         ret = usb_ep_queue(f_fb->out_ep, f_fb->out_req, 0);
 308         if (ret)
 309                 goto err;
 310
 311         return 0;
 312 err:
 313         fastboot_disable(f);
 314         return ret;
 315 }
 316
 317 static int fastboot_add(struct usb_configuration *c)
 318 {
 319         struct f_fastboot *f_fb = fastboot_func;
 320         int status;
 321
 322         debug("%s: cdev: 0x%p\n", __func__, c->cdev);
 323
 324         if (!f_fb) {
 325                 f_fb = memalign(CONFIG_SYS_CACHELINE_SIZE, sizeof(*f_fb));
 326                 if (!f_fb)
 327                         return -ENOMEM;
 328
 329                 fastboot_func = f_fb;
 330                 memset(f_fb, 0, sizeof(*f_fb));
 331         }
 332
 333         f_fb->usb_function.name = "f_fastboot";
 334         f_fb->usb_function.bind = fastboot_bind;
 335         f_fb->usb_function.unbind = fastboot_unbind;
 336         f_fb->usb_function.set_alt = fastboot_set_alt;
 337         f_fb->usb_function.disable = fastboot_disable;
 338         f_fb->usb_function.strings = fastboot_strings;
 339
 340         status = usb_add_function(c, &f_fb->usb_function);
 341         if (status) {
 342                 free(f_fb);
 343                 fastboot_func = f_fb;
 344         }
 345
 346         return status;
 347 }
 348 DECLARE_GADGET_BIND_CALLBACK(usb_dnl_fastboot, fastboot_add);
 349
 350 static int fastboot_tx_write(const char *buffer, unsigned int buffer_size)
 351 {
 352         struct usb_request *in_req = fastboot_func->in_req;
 353         int ret;
 354
 355         memcpy(in_req->buf, buffer, buffer_size);
 356         in_req->length = buffer_size;
 357
 358         usb_ep_dequeue(fastboot_func->in_ep, in_req);
 359
 360         ret = usb_ep_queue(fastboot_func->in_ep, in_req, 0);
 361         if (ret)
 362                 printf("Error %d on queue\n", ret);
 363         return 0;
 364 }
 365
 366 static int fastboot_tx_write_str(const char *buffer)
 367 {
 368         return fastboot_tx_write(buffer, strlen(buffer));
 369 }
 370
 371 static void compl_do_reset(struct usb_ep *ep, struct usb_request *req)
 372 {
 373         do_reset(NULL, 0, 0, NULL);
 374 }
 375
 376 int __weak fb_set_reboot_flag(void)
 377 {
 378         return -ENOSYS;
 379 }
 380
 381 static void cb_reboot(struct usb_ep *ep, struct usb_request *req)
 382 {
 383         char *cmd = req->buf;
 384         if (!strcmp_l1("reboot-bootloader", cmd)) {
 385                 if (fb_set_reboot_flag()) {
 386                         fastboot_tx_write_str("FAILCannot set reboot flag");
 387                         return;
 388                 }
 389         }
 390         fastboot_func->in_req->complete = compl_do_reset;
 391         fastboot_tx_write_str("OKAY");
 392 }
 393
 394 static int strcmp_l1(const char *s1, const char *s2)
 395 {
 396         if (!s1 || !s2)
 397                 return -1;
 398         return strncmp(s1, s2, strlen(s1));
 399 }
 400
 401 static void cb_getvar(struct usb_ep *ep, struct usb_request *req)
 402 {
 403         char *cmd = req->buf;
 404         char response[FASTBOOT_RESPONSE_LEN];
 405         const char *s;
 406         size_t chars_left;
 407
 408         strcpy(response, "OKAY");
 409         chars_left = sizeof(response) - strlen(response) - 1;
 410
 411         strsep(&cmd, ":");
 412         if (!cmd) {
 413                 error("missing variable");
 414                 fastboot_tx_write_str("FAILmissing var");
 415                 return;
 416         }
 417
 418         if (!strcmp_l1("version", cmd)) {
 419                 strncat(response, FASTBOOT_VERSION, chars_left);
 420         } else if (!strcmp_l1("bootloader-version", cmd)) {
 421                 strncat(response, U_BOOT_VERSION, chars_left);
 422         } else if (!strcmp_l1("downloadsize", cmd) ||
 423                 !strcmp_l1("max-download-size", cmd)) {
 424                 char str_num[12];
 425
 426                 sprintf(str_num, "0x%08x", CONFIG_FASTBOOT_BUF_SIZE);
 427                 strncat(response, str_num, chars_left);
 428
 429                 /*
 430                  * This also indicates the start of a new flashing
 431                  * "session", in which we could have 1-N buffers to
 432                  * write to a partition.
 433                  *
 434                  * Reset our session counter.
 435                  */
 436                 fastboot_flash_session_id = 0;
 437         } else if (!strcmp_l1("serialno", cmd)) {
 438                 s = getenv("serial#");
 439                 if (s)
 440                         strncat(response, s, chars_left);
 441                 else
 442                         strcpy(response, "FAILValue not set");
 443         } else {
 444                 char envstr[32];
 445
 446                 snprintf(envstr, sizeof(envstr) - 1, "fastboot.%s", cmd);
 447                 s = getenv(envstr);
 448                 if (s) {
 449                         strncat(response, s, chars_left);
 450                 } else {
 451                         printf("WARNING: unknown variable: %s\n", cmd);
 452                         strcpy(response, "FAILVariable not implemented");
 453                 }
 454         }
 455         fastboot_tx_write_str(response);
 456 }
 457
 458 static unsigned int rx_bytes_expected(unsigned int maxpacket)
 459 {
 460         int rx_remain = download_size - download_bytes;
 461         int rem = 0;
 462         if (rx_remain < 0)
 463                 return 0;
 464         if (rx_remain > EP_BUFFER_SIZE)
 465                 return EP_BUFFER_SIZE;
 466         if (rx_remain < maxpacket) {
 467                 rx_remain = maxpacket;
 468         } else if (rx_remain % maxpacket != 0) {
 469                 rem = rx_remain % maxpacket;
 470                 rx_remain = rx_remain + (maxpacket - rem);
 471         }
 472         return rx_remain;
 473 }
 474
 475 #define BYTES_PER_DOT   0x20000
 476 static void rx_handler_dl_image(struct usb_ep *ep, struct usb_request *req)
 477 {
 478         char response[FASTBOOT_RESPONSE_LEN];
 479         unsigned int transfer_size = download_size - download_bytes;
 480         const unsigned char *buffer = req->buf;
 481         unsigned int buffer_size = req->actual;
 482         unsigned int pre_dot_num, now_dot_num;
 483         unsigned int max;
 484
 485         if (req->status != 0) {
 486                 printf("Bad status: %d\n", req->status);
 487                 return;
 488         }
 489
 490         if (buffer_size < transfer_size)
 491                 transfer_size = buffer_size;
 492
 493         memcpy((void *)CONFIG_FASTBOOT_BUF_ADDR + download_bytes,
 494                buffer, transfer_size);
 495
 496         pre_dot_num = download_bytes / BYTES_PER_DOT;
 497         download_bytes += transfer_size;
 498         now_dot_num = download_bytes / BYTES_PER_DOT;
 499
 500         if (pre_dot_num != now_dot_num) {
 501                 putc('.');
 502                 if (!(now_dot_num % 74))
 503                         putc('\n');
 504         }
 505
 506         /* Check if transfer is done */
 507         if (download_bytes >= download_size) {
 508                 /*
 509                  * Reset global transfer variable, keep download_bytes because
 510                  * it will be used in the next possible flashing command
 511                  */
 512                 download_size = 0;
 513                 req->complete = rx_handler_command;
 514                 req->length = EP_BUFFER_SIZE;
 515
 516                 strcpy(response, "OKAY");
 517                 fastboot_tx_write_str(response);
 518
 519                 printf("\ndownloading of %d bytes finished\n", download_bytes);
 520         } else {
 521                 max = is_high_speed ? hs_ep_out.wMaxPacketSize :
 522                                 fs_ep_out.wMaxPacketSize;
 523                 req->length = rx_bytes_expected(max);
 524                 if (req->length < ep->maxpacket)
 525                         req->length = ep->maxpacket;
 526         }
 527
 528         req->actual = 0;
 529         usb_ep_queue(ep, req, 0);
 530 }
 531
 532 static void cb_download(struct usb_ep *ep, struct usb_request *req)
 533 {
 534         char *cmd = req->buf;
 535         char response[FASTBOOT_RESPONSE_LEN];
 536         unsigned int max;
 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                 max = is_high_speed ? hs_ep_out.wMaxPacketSize :
 553                         fs_ep_out.wMaxPacketSize;
 554                 req->length = rx_bytes_expected(max);
 555                 if (req->length < ep->maxpacket)
 556                         req->length = ep->maxpacket;
 557         }
 558         fastboot_tx_write_str(response);
 559 }
 560
 561 static void do_bootm_on_complete(struct usb_ep *ep, struct usb_request *req)
 562 {
 563         char boot_addr_start[12];
 564         char *bootm_args[] = { "bootm", boot_addr_start, NULL };
 565
 566         puts("Booting kernel..\n");
 567
 568         sprintf(boot_addr_start, "0x%lx", load_addr);
 569         do_bootm(NULL, 0, 2, bootm_args);
 570
 571         /* This only happens if image is somehow faulty so we start over */
 572         do_reset(NULL, 0, 0, NULL);
 573 }
 574
 575 static void cb_boot(struct usb_ep *ep, struct usb_request *req)
 576 {
 577         fastboot_func->in_req->complete = do_bootm_on_complete;
 578         fastboot_tx_write_str("OKAY");
 579 }
 580
 581 static void do_exit_on_complete(struct usb_ep *ep, struct usb_request *req)
 582 {
 583         g_dnl_trigger_detach();
 584 }
 585
 586 static void cb_continue(struct usb_ep *ep, struct usb_request *req)
 587 {
 588         fastboot_func->in_req->complete = do_exit_on_complete;
 589         fastboot_tx_write_str("OKAY");
 590 }
 591
 592 #ifdef CONFIG_FASTBOOT_FLASH
 593 static void cb_flash(struct usb_ep *ep, struct usb_request *req)
 594 {
 595         char *cmd = req->buf;
 596         char response[FASTBOOT_RESPONSE_LEN];
 597
 598         strsep(&cmd, ":");
 599         if (!cmd) {
 600                 error("missing partition name");
 601                 fastboot_tx_write_str("FAILmissing partition name");
 602                 return;
 603         }
 604
 605         strcpy(response, "FAILno flash device defined");
 606 #ifdef CONFIG_FASTBOOT_FLASH_MMC_DEV
 607         fb_mmc_flash_write(cmd, fastboot_flash_session_id,
 608                            (void *)CONFIG_FASTBOOT_BUF_ADDR,
 609                            download_bytes, response);
 610 #endif
 611 #ifdef CONFIG_FASTBOOT_FLASH_NAND_DEV
 612         fb_nand_flash_write(cmd, fastboot_flash_session_id,
 613                             (void *)CONFIG_FASTBOOT_BUF_ADDR,
 614                             download_bytes, response);
 615 #endif
 616         fastboot_flash_session_id++;
 617         fastboot_tx_write_str(response);
 618 }
 619 #endif
 620
 621 static void cb_oem(struct usb_ep *ep, struct usb_request *req)
 622 {
 623         char *cmd = req->buf;
 624 #ifdef CONFIG_FASTBOOT_FLASH_MMC_DEV
 625         if (strncmp("format", cmd + 4, 6) == 0) {
 626                 char cmdbuf[32];
 627                 sprintf(cmdbuf, "gpt write mmc %x $partitions",
 628                         CONFIG_FASTBOOT_FLASH_MMC_DEV);
 629                 if (run_command(cmdbuf, 0))
 630                         fastboot_tx_write_str("FAIL");
 631                 else
 632                         fastboot_tx_write_str("OKAY");
 633         } else
 634 #endif
 635         if (strncmp("unlock", cmd + 4, 8) == 0) {
 636                 fastboot_tx_write_str("FAILnot implemented");
 637         }
 638         else {
 639                 fastboot_tx_write_str("FAILunknown oem command");
 640         }
 641 }
 642
 643 #ifdef CONFIG_FASTBOOT_FLASH
 644 static void cb_erase(struct usb_ep *ep, struct usb_request *req)
 645 {
 646         char *cmd = req->buf;
 647         char response[FASTBOOT_RESPONSE_LEN];
 648
 649         strsep(&cmd, ":");
 650         if (!cmd) {
 651                 error("missing partition name");
 652                 fastboot_tx_write_str("FAILmissing partition name");
 653                 return;
 654         }
 655
 656         strcpy(response, "FAILno flash device defined");
 657
 658 #ifdef CONFIG_FASTBOOT_FLASH_MMC_DEV
 659         fb_mmc_erase(cmd, response);
 660 #endif
 661 #ifdef CONFIG_FASTBOOT_FLASH_NAND_DEV
 662         fb_nand_erase(cmd, response);
 663 #endif
 664         fastboot_tx_write_str(response);
 665 }
 666 #endif
 667
 668 struct cmd_dispatch_info {
 669         char *cmd;
 670         void (*cb)(struct usb_ep *ep, struct usb_request *req);
 671 };
 672
 673 static const struct cmd_dispatch_info cmd_dispatch_info[] = {
 674         {
 675                 .cmd = "reboot",
 676                 .cb = cb_reboot,
 677         }, {
 678                 .cmd = "getvar:",
 679                 .cb = cb_getvar,
 680         }, {
 681                 .cmd = "download:",
 682                 .cb = cb_download,
 683         }, {
 684                 .cmd = "boot",
 685                 .cb = cb_boot,
 686         }, {
 687                 .cmd = "continue",
 688                 .cb = cb_continue,
 689         },
 690 #ifdef CONFIG_FASTBOOT_FLASH
 691         {
 692                 .cmd = "flash",
 693                 .cb = cb_flash,
 694         }, {
 695                 .cmd = "erase",
 696                 .cb = cb_erase,
 697         },
 698 #endif
 699         {
 700                 .cmd = "oem",
 701                 .cb = cb_oem,
 702         },
 703 };
 704
 705 static void rx_handler_command(struct usb_ep *ep, struct usb_request *req)
 706 {
 707         char *cmdbuf = req->buf;
 708         void (*func_cb)(struct usb_ep *ep, struct usb_request *req) = NULL;
 709         int i;
 710
 711         if (req->status != 0 || req->length == 0)
 712                 return;
 713
 714         for (i = 0; i < ARRAY_SIZE(cmd_dispatch_info); i++) {
 715                 if (!strcmp_l1(cmd_dispatch_info[i].cmd, cmdbuf)) {
 716                         func_cb = cmd_dispatch_info[i].cb;
 717                         break;
 718                 }
 719         }
 720
 721         if (!func_cb) {
 722                 error("unknown command: %s", cmdbuf);
 723                 fastboot_tx_write_str("FAILunknown command");
 724         } else {
 725                 if (req->actual < req->length) {
 726                         u8 *buf = (u8 *)req->buf;
 727                         buf[req->actual] = 0;
 728                         func_cb(ep, req);
 729                 } else {
 730                         error("buffer overflow");
 731                         fastboot_tx_write_str("FAILbuffer overflow");
 732                 }
 733         }
 734
 735         *cmdbuf = '\0';
 736         req->actual = 0;
 737         usb_ep_queue(ep, req, 0);
 738 }