git.sur5r.net Git - u-boot/blob - drivers/usb/gadget/f_fastboot.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * (C) Copyright 2008 - 2009
   4  * Windriver, <www.windriver.com>
   5  * Tom Rix <Tom.Rix@windriver.com>
   6  *
   7  * Copyright 2011 Sebastian Andrzej Siewior <bigeasy@linutronix.de>
   8  *
   9  * Copyright 2014 Linaro, Ltd.
  10  * Rob Herring <robh@kernel.org>
  11  */
  12 #include <config.h>
  13 #include <common.h>
  14 #include <errno.h>
  15 #include <fastboot.h>
  16 #include <malloc.h>
  17 #include <linux/usb/ch9.h>
  18 #include <linux/usb/gadget.h>
  19 #include <linux/usb/composite.h>
  20 #include <linux/compiler.h>
  21 #include <version.h>
  22 #include <g_dnl.h>
  23 #ifdef CONFIG_FASTBOOT_FLASH_MMC
  24 #include <fb_mmc.h>
  25 #endif
  26 #ifdef CONFIG_FASTBOOT_FLASH_NAND
  27 #include <fb_nand.h>
  28 #endif
  29
  30 #define FASTBOOT_VERSION                "0.4"
  31
  32 #define FASTBOOT_INTERFACE_CLASS        0xff
  33 #define FASTBOOT_INTERFACE_SUB_CLASS    0x42
  34 #define FASTBOOT_INTERFACE_PROTOCOL     0x03
  35
  36 #define RX_ENDPOINT_MAXIMUM_PACKET_SIZE_2_0  (0x0200)
  37 #define RX_ENDPOINT_MAXIMUM_PACKET_SIZE_1_1  (0x0040)
  38 #define TX_ENDPOINT_MAXIMUM_PACKET_SIZE      (0x0040)
  39
  40 #define EP_BUFFER_SIZE                  4096
  41 /*
  42  * EP_BUFFER_SIZE must always be an integral multiple of maxpacket size
  43  * (64 or 512 or 1024), else we break on certain controllers like DWC3
  44  * that expect bulk OUT requests to be divisible by maxpacket size.
  45  */
  46
  47 struct f_fastboot {
  48         struct usb_function usb_function;
  49
  50         /* IN/OUT EP's and corresponding requests */
  51         struct usb_ep *in_ep, *out_ep;
  52         struct usb_request *in_req, *out_req;
  53 };
  54
  55 static inline struct f_fastboot *func_to_fastboot(struct usb_function *f)
  56 {
  57         return container_of(f, struct f_fastboot, usb_function);
  58 }
  59
  60 static struct f_fastboot *fastboot_func;
  61 static unsigned int download_size;
  62 static unsigned int download_bytes;
  63
  64 static struct usb_endpoint_descriptor fs_ep_in = {
  65         .bLength            = USB_DT_ENDPOINT_SIZE,
  66         .bDescriptorType    = USB_DT_ENDPOINT,
  67         .bEndpointAddress   = USB_DIR_IN,
  68         .bmAttributes       = USB_ENDPOINT_XFER_BULK,
  69         .wMaxPacketSize     = cpu_to_le16(64),
  70 };
  71
  72 static struct usb_endpoint_descriptor fs_ep_out = {
  73         .bLength                = USB_DT_ENDPOINT_SIZE,
  74         .bDescriptorType        = USB_DT_ENDPOINT,
  75         .bEndpointAddress       = USB_DIR_OUT,
  76         .bmAttributes           = USB_ENDPOINT_XFER_BULK,
  77         .wMaxPacketSize         = cpu_to_le16(64),
  78 };
  79
  80 static struct usb_endpoint_descriptor hs_ep_in = {
  81         .bLength                = USB_DT_ENDPOINT_SIZE,
  82         .bDescriptorType        = USB_DT_ENDPOINT,
  83         .bEndpointAddress       = USB_DIR_IN,
  84         .bmAttributes           = USB_ENDPOINT_XFER_BULK,
  85         .wMaxPacketSize         = cpu_to_le16(512),
  86 };
  87
  88 static struct usb_endpoint_descriptor hs_ep_out = {
  89         .bLength                = USB_DT_ENDPOINT_SIZE,
  90         .bDescriptorType        = USB_DT_ENDPOINT,
  91         .bEndpointAddress       = USB_DIR_OUT,
  92         .bmAttributes           = USB_ENDPOINT_XFER_BULK,
  93         .wMaxPacketSize         = cpu_to_le16(512),
  94 };
  95
  96 static struct usb_interface_descriptor interface_desc = {
  97         .bLength                = USB_DT_INTERFACE_SIZE,
  98         .bDescriptorType        = USB_DT_INTERFACE,
  99         .bInterfaceNumber       = 0x00,
 100         .bAlternateSetting      = 0x00,
 101         .bNumEndpoints          = 0x02,
 102         .bInterfaceClass        = FASTBOOT_INTERFACE_CLASS,
 103         .bInterfaceSubClass     = FASTBOOT_INTERFACE_SUB_CLASS,
 104         .bInterfaceProtocol     = FASTBOOT_INTERFACE_PROTOCOL,
 105 };
 106
 107 static struct usb_descriptor_header *fb_fs_function[] = {
 108         (struct usb_descriptor_header *)&interface_desc,
 109         (struct usb_descriptor_header *)&fs_ep_in,
 110         (struct usb_descriptor_header *)&fs_ep_out,
 111 };
 112
 113 static struct usb_descriptor_header *fb_hs_function[] = {
 114         (struct usb_descriptor_header *)&interface_desc,
 115         (struct usb_descriptor_header *)&hs_ep_in,
 116         (struct usb_descriptor_header *)&hs_ep_out,
 117         NULL,
 118 };
 119
 120 static struct usb_endpoint_descriptor *
 121 fb_ep_desc(struct usb_gadget *g, struct usb_endpoint_descriptor *fs,
 122             struct usb_endpoint_descriptor *hs)
 123 {
 124         if (gadget_is_dualspeed(g) && g->speed == USB_SPEED_HIGH)
 125                 return hs;
 126         return fs;
 127 }
 128
 129 /*
 130  * static strings, in UTF-8
 131  */
 132 static const char fastboot_name[] = "Android Fastboot";
 133
 134 static struct usb_string fastboot_string_defs[] = {
 135         [0].s = fastboot_name,
 136         {  }                    /* end of list */
 137 };
 138
 139 static struct usb_gadget_strings stringtab_fastboot = {
 140         .language       = 0x0409,       /* en-us */
 141         .strings        = fastboot_string_defs,
 142 };
 143
 144 static struct usb_gadget_strings *fastboot_strings[] = {
 145         &stringtab_fastboot,
 146         NULL,
 147 };
 148
 149 static void rx_handler_command(struct usb_ep *ep, struct usb_request *req);
 150 static int strcmp_l1(const char *s1, const char *s2);
 151
 152 static void fastboot_complete(struct usb_ep *ep, struct usb_request *req)
 153 {
 154         int status = req->status;
 155         if (!status)
 156                 return;
 157         printf("status: %d ep '%s' trans: %d\n", status, ep->name, req->actual);
 158 }
 159
 160 static int fastboot_bind(struct usb_configuration *c, struct usb_function *f)
 161 {
 162         int id;
 163         struct usb_gadget *gadget = c->cdev->gadget;
 164         struct f_fastboot *f_fb = func_to_fastboot(f);
 165         const char *s;
 166
 167         /* DYNAMIC interface numbers assignments */
 168         id = usb_interface_id(c, f);
 169         if (id < 0)
 170                 return id;
 171         interface_desc.bInterfaceNumber = id;
 172
 173         id = usb_string_id(c->cdev);
 174         if (id < 0)
 175                 return id;
 176         fastboot_string_defs[0].id = id;
 177         interface_desc.iInterface = id;
 178
 179         f_fb->in_ep = usb_ep_autoconfig(gadget, &fs_ep_in);
 180         if (!f_fb->in_ep)
 181                 return -ENODEV;
 182         f_fb->in_ep->driver_data = c->cdev;
 183
 184         f_fb->out_ep = usb_ep_autoconfig(gadget, &fs_ep_out);
 185         if (!f_fb->out_ep)
 186                 return -ENODEV;
 187         f_fb->out_ep->driver_data = c->cdev;
 188
 189         f->descriptors = fb_fs_function;
 190
 191         if (gadget_is_dualspeed(gadget)) {
 192                 /* Assume endpoint addresses are the same for both speeds */
 193                 hs_ep_in.bEndpointAddress = fs_ep_in.bEndpointAddress;
 194                 hs_ep_out.bEndpointAddress = fs_ep_out.bEndpointAddress;
 195                 /* copy HS descriptors */
 196                 f->hs_descriptors = fb_hs_function;
 197         }
 198
 199         s = env_get("serial#");
 200         if (s)
 201                 g_dnl_set_serialnumber((char *)s);
 202
 203         return 0;
 204 }
 205
 206 static void fastboot_unbind(struct usb_configuration *c, struct usb_function *f)
 207 {
 208         memset(fastboot_func, 0, sizeof(*fastboot_func));
 209 }
 210
 211 static void fastboot_disable(struct usb_function *f)
 212 {
 213         struct f_fastboot *f_fb = func_to_fastboot(f);
 214
 215         usb_ep_disable(f_fb->out_ep);
 216         usb_ep_disable(f_fb->in_ep);
 217
 218         if (f_fb->out_req) {
 219                 free(f_fb->out_req->buf);
 220                 usb_ep_free_request(f_fb->out_ep, f_fb->out_req);
 221                 f_fb->out_req = NULL;
 222         }
 223         if (f_fb->in_req) {
 224                 free(f_fb->in_req->buf);
 225                 usb_ep_free_request(f_fb->in_ep, f_fb->in_req);
 226                 f_fb->in_req = NULL;
 227         }
 228 }
 229
 230 static struct usb_request *fastboot_start_ep(struct usb_ep *ep)
 231 {
 232         struct usb_request *req;
 233
 234         req = usb_ep_alloc_request(ep, 0);
 235         if (!req)
 236                 return NULL;
 237
 238         req->length = EP_BUFFER_SIZE;
 239         req->buf = memalign(CONFIG_SYS_CACHELINE_SIZE, EP_BUFFER_SIZE);
 240         if (!req->buf) {
 241                 usb_ep_free_request(ep, req);
 242                 return NULL;
 243         }
 244
 245         memset(req->buf, 0, req->length);
 246         return req;
 247 }
 248
 249 static int fastboot_set_alt(struct usb_function *f,
 250                             unsigned interface, unsigned alt)
 251 {
 252         int ret;
 253         struct usb_composite_dev *cdev = f->config->cdev;
 254         struct usb_gadget *gadget = cdev->gadget;
 255         struct f_fastboot *f_fb = func_to_fastboot(f);
 256         const struct usb_endpoint_descriptor *d;
 257
 258         debug("%s: func: %s intf: %d alt: %d\n",
 259               __func__, f->name, interface, alt);
 260
 261         d = fb_ep_desc(gadget, &fs_ep_out, &hs_ep_out);
 262         ret = usb_ep_enable(f_fb->out_ep, d);
 263         if (ret) {
 264                 puts("failed to enable out ep\n");
 265                 return ret;
 266         }
 267
 268         f_fb->out_req = fastboot_start_ep(f_fb->out_ep);
 269         if (!f_fb->out_req) {
 270                 puts("failed to alloc out req\n");
 271                 ret = -EINVAL;
 272                 goto err;
 273         }
 274         f_fb->out_req->complete = rx_handler_command;
 275
 276         d = fb_ep_desc(gadget, &fs_ep_in, &hs_ep_in);
 277         ret = usb_ep_enable(f_fb->in_ep, d);
 278         if (ret) {
 279                 puts("failed to enable in ep\n");
 280                 goto err;
 281         }
 282
 283         f_fb->in_req = fastboot_start_ep(f_fb->in_ep);
 284         if (!f_fb->in_req) {
 285                 puts("failed alloc req in\n");
 286                 ret = -EINVAL;
 287                 goto err;
 288         }
 289         f_fb->in_req->complete = fastboot_complete;
 290
 291         ret = usb_ep_queue(f_fb->out_ep, f_fb->out_req, 0);
 292         if (ret)
 293                 goto err;
 294
 295         return 0;
 296 err:
 297         fastboot_disable(f);
 298         return ret;
 299 }
 300
 301 static int fastboot_add(struct usb_configuration *c)
 302 {
 303         struct f_fastboot *f_fb = fastboot_func;
 304         int status;
 305
 306         debug("%s: cdev: 0x%p\n", __func__, c->cdev);
 307
 308         if (!f_fb) {
 309                 f_fb = memalign(CONFIG_SYS_CACHELINE_SIZE, sizeof(*f_fb));
 310                 if (!f_fb)
 311                         return -ENOMEM;
 312
 313                 fastboot_func = f_fb;
 314                 memset(f_fb, 0, sizeof(*f_fb));
 315         }
 316
 317         f_fb->usb_function.name = "f_fastboot";
 318         f_fb->usb_function.bind = fastboot_bind;
 319         f_fb->usb_function.unbind = fastboot_unbind;
 320         f_fb->usb_function.set_alt = fastboot_set_alt;
 321         f_fb->usb_function.disable = fastboot_disable;
 322         f_fb->usb_function.strings = fastboot_strings;
 323
 324         status = usb_add_function(c, &f_fb->usb_function);
 325         if (status) {
 326                 free(f_fb);
 327                 fastboot_func = f_fb;
 328         }
 329
 330         return status;
 331 }
 332 DECLARE_GADGET_BIND_CALLBACK(usb_dnl_fastboot, fastboot_add);
 333
 334 static int fastboot_tx_write(const char *buffer, unsigned int buffer_size)
 335 {
 336         struct usb_request *in_req = fastboot_func->in_req;
 337         int ret;
 338
 339         memcpy(in_req->buf, buffer, buffer_size);
 340         in_req->length = buffer_size;
 341
 342         usb_ep_dequeue(fastboot_func->in_ep, in_req);
 343
 344         ret = usb_ep_queue(fastboot_func->in_ep, in_req, 0);
 345         if (ret)
 346                 printf("Error %d on queue\n", ret);
 347         return 0;
 348 }
 349
 350 static int fastboot_tx_write_str(const char *buffer)
 351 {
 352         return fastboot_tx_write(buffer, strlen(buffer));
 353 }
 354
 355 static void compl_do_reset(struct usb_ep *ep, struct usb_request *req)
 356 {
 357         do_reset(NULL, 0, 0, NULL);
 358 }
 359
 360 static void cb_reboot(struct usb_ep *ep, struct usb_request *req)
 361 {
 362         char *cmd = req->buf;
 363         if (!strcmp_l1("reboot-bootloader", cmd)) {
 364                 if (fastboot_set_reboot_flag()) {
 365                         fastboot_tx_write_str("FAILCannot set reboot flag");
 366                         return;
 367                 }
 368         }
 369         fastboot_func->in_req->complete = compl_do_reset;
 370         fastboot_tx_write_str("OKAY");
 371 }
 372
 373 static int strcmp_l1(const char *s1, const char *s2)
 374 {
 375         if (!s1 || !s2)
 376                 return -1;
 377         return strncmp(s1, s2, strlen(s1));
 378 }
 379
 380 static void cb_getvar(struct usb_ep *ep, struct usb_request *req)
 381 {
 382         char *cmd = req->buf;
 383         char response[FASTBOOT_RESPONSE_LEN];
 384         const char *s;
 385         size_t chars_left;
 386
 387         strcpy(response, "OKAY");
 388         chars_left = sizeof(response) - strlen(response) - 1;
 389
 390         strsep(&cmd, ":");
 391         if (!cmd) {
 392                 pr_err("missing variable");
 393                 fastboot_tx_write_str("FAILmissing var");
 394                 return;
 395         }
 396
 397         if (!strcmp_l1("version", cmd)) {
 398                 strncat(response, FASTBOOT_VERSION, chars_left);
 399         } else if (!strcmp_l1("bootloader-version", cmd)) {
 400                 strncat(response, U_BOOT_VERSION, chars_left);
 401         } else if (!strcmp_l1("downloadsize", cmd) ||
 402                 !strcmp_l1("max-download-size", cmd)) {
 403                 char str_num[12];
 404
 405                 sprintf(str_num, "0x%08x", CONFIG_FASTBOOT_BUF_SIZE);
 406                 strncat(response, str_num, chars_left);
 407         } else if (!strcmp_l1("serialno", cmd)) {
 408                 s = env_get("serial#");
 409                 if (s)
 410                         strncat(response, s, chars_left);
 411                 else
 412                         strcpy(response, "FAILValue not set");
 413         } else {
 414                 char *envstr;
 415
 416                 envstr = malloc(strlen("fastboot.") + strlen(cmd) + 1);
 417                 if (!envstr) {
 418                         fastboot_tx_write_str("FAILmalloc error");
 419                         return;
 420                 }
 421
 422                 sprintf(envstr, "fastboot.%s", cmd);
 423                 s = env_get(envstr);
 424                 if (s) {
 425                         strncat(response, s, chars_left);
 426                 } else {
 427                         printf("WARNING: unknown variable: %s\n", cmd);
 428                         strcpy(response, "FAILVariable not implemented");
 429                 }
 430
 431                 free(envstr);
 432         }
 433         fastboot_tx_write_str(response);
 434 }
 435
 436 static unsigned int rx_bytes_expected(struct usb_ep *ep)
 437 {
 438         int rx_remain = download_size - download_bytes;
 439         unsigned int rem;
 440         unsigned int maxpacket = ep->maxpacket;
 441
 442         if (rx_remain <= 0)
 443                 return 0;
 444         else if (rx_remain > EP_BUFFER_SIZE)
 445                 return EP_BUFFER_SIZE;
 446
 447         /*
 448          * Some controllers e.g. DWC3 don't like OUT transfers to be
 449          * not ending in maxpacket boundary. So just make them happy by
 450          * always requesting for integral multiple of maxpackets.
 451          * This shouldn't bother controllers that don't care about it.
 452          */
 453         rem = rx_remain % maxpacket;
 454         if (rem > 0)
 455                 rx_remain = rx_remain + (maxpacket - rem);
 456
 457         return rx_remain;
 458 }
 459
 460 #define BYTES_PER_DOT   0x20000
 461 static void rx_handler_dl_image(struct usb_ep *ep, struct usb_request *req)
 462 {
 463         char response[FASTBOOT_RESPONSE_LEN];
 464         unsigned int transfer_size = download_size - download_bytes;
 465         const unsigned char *buffer = req->buf;
 466         unsigned int buffer_size = req->actual;
 467         unsigned int pre_dot_num, now_dot_num;
 468
 469         if (req->status != 0) {
 470                 printf("Bad status: %d\n", req->status);
 471                 return;
 472         }
 473
 474         if (buffer_size < transfer_size)
 475                 transfer_size = buffer_size;
 476
 477         memcpy((void *)CONFIG_FASTBOOT_BUF_ADDR + download_bytes,
 478                buffer, transfer_size);
 479
 480         pre_dot_num = download_bytes / BYTES_PER_DOT;
 481         download_bytes += transfer_size;
 482         now_dot_num = download_bytes / BYTES_PER_DOT;
 483
 484         if (pre_dot_num != now_dot_num) {
 485                 putc('.');
 486                 if (!(now_dot_num % 74))
 487                         putc('\n');
 488         }
 489
 490         /* Check if transfer is done */
 491         if (download_bytes >= download_size) {
 492                 /*
 493                  * Reset global transfer variable, keep download_bytes because
 494                  * it will be used in the next possible flashing command
 495                  */
 496                 download_size = 0;
 497                 req->complete = rx_handler_command;
 498                 req->length = EP_BUFFER_SIZE;
 499
 500                 strcpy(response, "OKAY");
 501                 fastboot_tx_write_str(response);
 502
 503                 printf("\ndownloading of %d bytes finished\n", download_bytes);
 504         } else {
 505                 req->length = rx_bytes_expected(ep);
 506         }
 507
 508         req->actual = 0;
 509         usb_ep_queue(ep, req, 0);
 510 }
 511
 512 static void cb_download(struct usb_ep *ep, struct usb_request *req)
 513 {
 514         char *cmd = req->buf;
 515         char response[FASTBOOT_RESPONSE_LEN];
 516
 517         strsep(&cmd, ":");
 518         download_size = simple_strtoul(cmd, NULL, 16);
 519         download_bytes = 0;
 520
 521         printf("Starting download of %d bytes\n", download_size);
 522
 523         if (0 == download_size) {
 524                 strcpy(response, "FAILdata invalid size");
 525         } else if (download_size > CONFIG_FASTBOOT_BUF_SIZE) {
 526                 download_size = 0;
 527                 strcpy(response, "FAILdata too large");
 528         } else {
 529                 sprintf(response, "DATA%08x", download_size);
 530                 req->complete = rx_handler_dl_image;
 531                 req->length = rx_bytes_expected(ep);
 532         }
 533         fastboot_tx_write_str(response);
 534 }
 535
 536 static void do_bootm_on_complete(struct usb_ep *ep, struct usb_request *req)
 537 {
 538         char boot_addr_start[12];
 539         char *bootm_args[] = { "bootm", boot_addr_start, NULL };
 540
 541         puts("Booting kernel..\n");
 542
 543         sprintf(boot_addr_start, "0x%lx", (long)CONFIG_FASTBOOT_BUF_ADDR);
 544         do_bootm(NULL, 0, 2, bootm_args);
 545
 546         /* This only happens if image is somehow faulty so we start over */
 547         do_reset(NULL, 0, 0, NULL);
 548 }
 549
 550 static void cb_boot(struct usb_ep *ep, struct usb_request *req)
 551 {
 552         fastboot_func->in_req->complete = do_bootm_on_complete;
 553         fastboot_tx_write_str("OKAY");
 554 }
 555
 556 static void do_exit_on_complete(struct usb_ep *ep, struct usb_request *req)
 557 {
 558         g_dnl_trigger_detach();
 559 }
 560
 561 static void cb_continue(struct usb_ep *ep, struct usb_request *req)
 562 {
 563         fastboot_func->in_req->complete = do_exit_on_complete;
 564         fastboot_tx_write_str("OKAY");
 565 }
 566
 567 #ifdef CONFIG_FASTBOOT_FLASH
 568 static void cb_flash(struct usb_ep *ep, struct usb_request *req)
 569 {
 570         char *cmd = req->buf;
 571         char response[FASTBOOT_RESPONSE_LEN];
 572
 573         strsep(&cmd, ":");
 574         if (!cmd) {
 575                 pr_err("missing partition name");
 576                 fastboot_tx_write_str("FAILmissing partition name");
 577                 return;
 578         }
 579
 580         fastboot_fail("no flash device defined", response);
 581 #ifdef CONFIG_FASTBOOT_FLASH_MMC
 582         fb_mmc_flash_write(cmd, (void *)CONFIG_FASTBOOT_BUF_ADDR,
 583                            download_bytes, response);
 584 #endif
 585 #ifdef CONFIG_FASTBOOT_FLASH_NAND
 586         fb_nand_flash_write(cmd, (void *)CONFIG_FASTBOOT_BUF_ADDR,
 587                             download_bytes, response);
 588 #endif
 589         fastboot_tx_write_str(response);
 590 }
 591 #endif
 592
 593 static void cb_oem(struct usb_ep *ep, struct usb_request *req)
 594 {
 595         char *cmd = req->buf;
 596 #ifdef CONFIG_FASTBOOT_FLASH_MMC
 597         if (strncmp("format", cmd + 4, 6) == 0) {
 598                 char cmdbuf[32];
 599                 sprintf(cmdbuf, "gpt write mmc %x $partitions",
 600                         CONFIG_FASTBOOT_FLASH_MMC_DEV);
 601                 if (run_command(cmdbuf, 0))
 602                         fastboot_tx_write_str("FAIL");
 603                 else
 604                         fastboot_tx_write_str("OKAY");
 605         } else
 606 #endif
 607         if (strncmp("unlock", cmd + 4, 8) == 0) {
 608                 fastboot_tx_write_str("FAILnot implemented");
 609         }
 610         else {
 611                 fastboot_tx_write_str("FAILunknown oem command");
 612         }
 613 }
 614
 615 #ifdef CONFIG_FASTBOOT_FLASH
 616 static void cb_erase(struct usb_ep *ep, struct usb_request *req)
 617 {
 618         char *cmd = req->buf;
 619         char response[FASTBOOT_RESPONSE_LEN];
 620
 621         strsep(&cmd, ":");
 622         if (!cmd) {
 623                 pr_err("missing partition name");
 624                 fastboot_tx_write_str("FAILmissing partition name");
 625                 return;
 626         }
 627
 628         fastboot_fail("no flash device defined", response);
 629 #ifdef CONFIG_FASTBOOT_FLASH_MMC
 630         fb_mmc_erase(cmd, response);
 631 #endif
 632 #ifdef CONFIG_FASTBOOT_FLASH_NAND
 633         fb_nand_erase(cmd, response);
 634 #endif
 635         fastboot_tx_write_str(response);
 636 }
 637 #endif
 638
 639 struct cmd_dispatch_info {
 640         char *cmd;
 641         void (*cb)(struct usb_ep *ep, struct usb_request *req);
 642 };
 643
 644 static const struct cmd_dispatch_info cmd_dispatch_info[] = {
 645         {
 646                 .cmd = "reboot",
 647                 .cb = cb_reboot,
 648         }, {
 649                 .cmd = "getvar:",
 650                 .cb = cb_getvar,
 651         }, {
 652                 .cmd = "download:",
 653                 .cb = cb_download,
 654         }, {
 655                 .cmd = "boot",
 656                 .cb = cb_boot,
 657         }, {
 658                 .cmd = "continue",
 659                 .cb = cb_continue,
 660         },
 661 #ifdef CONFIG_FASTBOOT_FLASH
 662         {
 663                 .cmd = "flash",
 664                 .cb = cb_flash,
 665         }, {
 666                 .cmd = "erase",
 667                 .cb = cb_erase,
 668         },
 669 #endif
 670         {
 671                 .cmd = "oem",
 672                 .cb = cb_oem,
 673         },
 674 };
 675
 676 static void rx_handler_command(struct usb_ep *ep, struct usb_request *req)
 677 {
 678         char *cmdbuf = req->buf;
 679         void (*func_cb)(struct usb_ep *ep, struct usb_request *req) = NULL;
 680         int i;
 681
 682         if (req->status != 0 || req->length == 0)
 683                 return;
 684
 685         for (i = 0; i < ARRAY_SIZE(cmd_dispatch_info); i++) {
 686                 if (!strcmp_l1(cmd_dispatch_info[i].cmd, cmdbuf)) {
 687                         func_cb = cmd_dispatch_info[i].cb;
 688                         break;
 689                 }
 690         }
 691
 692         if (!func_cb) {
 693                 pr_err("unknown command: %.*s", req->actual, cmdbuf);
 694                 fastboot_tx_write_str("FAILunknown command");
 695         } else {
 696                 if (req->actual < req->length) {
 697                         u8 *buf = (u8 *)req->buf;
 698                         buf[req->actual] = 0;
 699                         func_cb(ep, req);
 700                 } else {
 701                         pr_err("buffer overflow");
 702                         fastboot_tx_write_str("FAILbuffer overflow");
 703                 }
 704         }
 705
 706         *cmdbuf = '\0';
 707         req->actual = 0;
 708         usb_ep_queue(ep, req, 0);
 709 }