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