common/cmd_usb.c

   1 /*
   2  * (C) Copyright 2001
   3  * Denis Peter, MPL AG Switzerland
   4  *
   5  * Most of this source has been derived from the Linux USB
   6  * project.
   7  *
   8  * SPDX-License-Identifier:     GPL-2.0+
   9  */
  10
  11 #include <common.h>
  12 #include <command.h>
  13 #include <asm/byteorder.h>
  14 #include <asm/unaligned.h>
  15 #include <part.h>
  16 #include <usb.h>
  17
  18 #ifdef CONFIG_USB_STORAGE
  19 static int usb_stor_curr_dev = -1; /* current device */
  20 #endif
  21 #ifdef CONFIG_USB_HOST_ETHER
  22 static int usb_ether_curr_dev = -1; /* current ethernet device */
  23 #endif
  24
  25 /* some display routines (info command) */
  26 static char *usb_get_class_desc(unsigned char dclass)
  27 {
  28         switch (dclass) {
  29         case USB_CLASS_PER_INTERFACE:
  30                 return "See Interface";
  31         case USB_CLASS_AUDIO:
  32                 return "Audio";
  33         case USB_CLASS_COMM:
  34                 return "Communication";
  35         case USB_CLASS_HID:
  36                 return "Human Interface";
  37         case USB_CLASS_PRINTER:
  38                 return "Printer";
  39         case USB_CLASS_MASS_STORAGE:
  40                 return "Mass Storage";
  41         case USB_CLASS_HUB:
  42                 return "Hub";
  43         case USB_CLASS_DATA:
  44                 return "CDC Data";
  45         case USB_CLASS_VENDOR_SPEC:
  46                 return "Vendor specific";
  47         default:
  48                 return "";
  49         }
  50 }
  51
  52 static void usb_display_class_sub(unsigned char dclass, unsigned char subclass,
  53                                   unsigned char proto)
  54 {
  55         switch (dclass) {
  56         case USB_CLASS_PER_INTERFACE:
  57                 printf("See Interface");
  58                 break;
  59         case USB_CLASS_HID:
  60                 printf("Human Interface, Subclass: ");
  61                 switch (subclass) {
  62                 case USB_SUB_HID_NONE:
  63                         printf("None");
  64                         break;
  65                 case USB_SUB_HID_BOOT:
  66                         printf("Boot ");
  67                         switch (proto) {
  68                         case USB_PROT_HID_NONE:
  69                                 printf("None");
  70                                 break;
  71                         case USB_PROT_HID_KEYBOARD:
  72                                 printf("Keyboard");
  73                                 break;
  74                         case USB_PROT_HID_MOUSE:
  75                                 printf("Mouse");
  76                                 break;
  77                         default:
  78                                 printf("reserved");
  79                                 break;
  80                         }
  81                         break;
  82                 default:
  83                         printf("reserved");
  84                         break;
  85                 }
  86                 break;
  87         case USB_CLASS_MASS_STORAGE:
  88                 printf("Mass Storage, ");
  89                 switch (subclass) {
  90                 case US_SC_RBC:
  91                         printf("RBC ");
  92                         break;
  93                 case US_SC_8020:
  94                         printf("SFF-8020i (ATAPI)");
  95                         break;
  96                 case US_SC_QIC:
  97                         printf("QIC-157 (Tape)");
  98                         break;
  99                 case US_SC_UFI:
 100                         printf("UFI");
 101                         break;
 102                 case US_SC_8070:
 103                         printf("SFF-8070");
 104                         break;
 105                 case US_SC_SCSI:
 106                         printf("Transp. SCSI");
 107                         break;
 108                 default:
 109                         printf("reserved");
 110                         break;
 111                 }
 112                 printf(", ");
 113                 switch (proto) {
 114                 case US_PR_CB:
 115                         printf("Command/Bulk");
 116                         break;
 117                 case US_PR_CBI:
 118                         printf("Command/Bulk/Int");
 119                         break;
 120                 case US_PR_BULK:
 121                         printf("Bulk only");
 122                         break;
 123                 default:
 124                         printf("reserved");
 125                         break;
 126                 }
 127                 break;
 128         default:
 129                 printf("%s", usb_get_class_desc(dclass));
 130                 break;
 131         }
 132 }
 133
 134 static void usb_display_string(struct usb_device *dev, int index)
 135 {
 136         ALLOC_CACHE_ALIGN_BUFFER(char, buffer, 256);
 137
 138         if (index != 0) {
 139                 if (usb_string(dev, index, &buffer[0], 256) > 0)
 140                         printf("String: \"%s\"", buffer);
 141         }
 142 }
 143
 144 static void usb_display_desc(struct usb_device *dev)
 145 {
 146         if (dev->descriptor.bDescriptorType == USB_DT_DEVICE) {
 147                 printf("%d: %s,  USB Revision %x.%x\n", dev->devnum,
 148                 usb_get_class_desc(dev->config.if_desc[0].desc.bInterfaceClass),
 149                                    (dev->descriptor.bcdUSB>>8) & 0xff,
 150                                    dev->descriptor.bcdUSB & 0xff);
 151
 152                 if (strlen(dev->mf) || strlen(dev->prod) ||
 153                     strlen(dev->serial))
 154                         printf(" - %s %s %s\n", dev->mf, dev->prod,
 155                                 dev->serial);
 156                 if (dev->descriptor.bDeviceClass) {
 157                         printf(" - Class: ");
 158                         usb_display_class_sub(dev->descriptor.bDeviceClass,
 159                                               dev->descriptor.bDeviceSubClass,
 160                                               dev->descriptor.bDeviceProtocol);
 161                         printf("\n");
 162                 } else {
 163                         printf(" - Class: (from Interface) %s\n",
 164                                usb_get_class_desc(
 165                                 dev->config.if_desc[0].desc.bInterfaceClass));
 166                 }
 167                 printf(" - PacketSize: %d  Configurations: %d\n",
 168                         dev->descriptor.bMaxPacketSize0,
 169                         dev->descriptor.bNumConfigurations);
 170                 printf(" - Vendor: 0x%04x  Product 0x%04x Version %d.%d\n",
 171                         dev->descriptor.idVendor, dev->descriptor.idProduct,
 172                         (dev->descriptor.bcdDevice>>8) & 0xff,
 173                         dev->descriptor.bcdDevice & 0xff);
 174         }
 175
 176 }
 177
 178 static void usb_display_conf_desc(struct usb_config_descriptor *config,
 179                                   struct usb_device *dev)
 180 {
 181         printf("   Configuration: %d\n", config->bConfigurationValue);
 182         printf("   - Interfaces: %d %s%s%dmA\n", config->bNumInterfaces,
 183                (config->bmAttributes & 0x40) ? "Self Powered " : "Bus Powered ",
 184                (config->bmAttributes & 0x20) ? "Remote Wakeup " : "",
 185                 config->bMaxPower*2);
 186         if (config->iConfiguration) {
 187                 printf("   - ");
 188                 usb_display_string(dev, config->iConfiguration);
 189                 printf("\n");
 190         }
 191 }
 192
 193 static void usb_display_if_desc(struct usb_interface_descriptor *ifdesc,
 194                                 struct usb_device *dev)
 195 {
 196         printf("     Interface: %d\n", ifdesc->bInterfaceNumber);
 197         printf("     - Alternate Setting %d, Endpoints: %d\n",
 198                 ifdesc->bAlternateSetting, ifdesc->bNumEndpoints);
 199         printf("     - Class ");
 200         usb_display_class_sub(ifdesc->bInterfaceClass,
 201                 ifdesc->bInterfaceSubClass, ifdesc->bInterfaceProtocol);
 202         printf("\n");
 203         if (ifdesc->iInterface) {
 204                 printf("     - ");
 205                 usb_display_string(dev, ifdesc->iInterface);
 206                 printf("\n");
 207         }
 208 }
 209
 210 static void usb_display_ep_desc(struct usb_endpoint_descriptor *epdesc)
 211 {
 212         printf("     - Endpoint %d %s ", epdesc->bEndpointAddress & 0xf,
 213                 (epdesc->bEndpointAddress & 0x80) ? "In" : "Out");
 214         switch ((epdesc->bmAttributes & 0x03)) {
 215         case 0:
 216                 printf("Control");
 217                 break;
 218         case 1:
 219                 printf("Isochronous");
 220                 break;
 221         case 2:
 222                 printf("Bulk");
 223                 break;
 224         case 3:
 225                 printf("Interrupt");
 226                 break;
 227         }
 228         printf(" MaxPacket %d", get_unaligned(&epdesc->wMaxPacketSize));
 229         if ((epdesc->bmAttributes & 0x03) == 0x3)
 230                 printf(" Interval %dms", epdesc->bInterval);
 231         printf("\n");
 232 }
 233
 234 /* main routine to diasplay the configs, interfaces and endpoints */
 235 static void usb_display_config(struct usb_device *dev)
 236 {
 237         struct usb_config *config;
 238         struct usb_interface *ifdesc;
 239         struct usb_endpoint_descriptor *epdesc;
 240         int i, ii;
 241
 242         config = &dev->config;
 243         usb_display_conf_desc(&config->desc, dev);
 244         for (i = 0; i < config->no_of_if; i++) {
 245                 ifdesc = &config->if_desc[i];
 246                 usb_display_if_desc(&ifdesc->desc, dev);
 247                 for (ii = 0; ii < ifdesc->no_of_ep; ii++) {
 248                         epdesc = &ifdesc->ep_desc[ii];
 249                         usb_display_ep_desc(epdesc);
 250                 }
 251         }
 252         printf("\n");
 253 }
 254
 255 static struct usb_device *usb_find_device(int devnum)
 256 {
 257         struct usb_device *dev;
 258         int d;
 259
 260         for (d = 0; d < USB_MAX_DEVICE; d++) {
 261                 dev = usb_get_dev_index(d);
 262                 if (dev == NULL)
 263                         return NULL;
 264                 if (dev->devnum == devnum)
 265                         return dev;
 266         }
 267
 268         return NULL;
 269 }
 270
 271 static inline char *portspeed(int speed)
 272 {
 273         char *speed_str;
 274
 275         switch (speed) {
 276         case USB_SPEED_SUPER:
 277                 speed_str = "5 Gb/s";
 278                 break;
 279         case USB_SPEED_HIGH:
 280                 speed_str = "480 Mb/s";
 281                 break;
 282         case USB_SPEED_LOW:
 283                 speed_str = "1.5 Mb/s";
 284                 break;
 285         default:
 286                 speed_str = "12 Mb/s";
 287                 break;
 288         }
 289
 290         return speed_str;
 291 }
 292
 293 /* shows the device tree recursively */
 294 static void usb_show_tree_graph(struct usb_device *dev, char *pre)
 295 {
 296         int i, index;
 297         int has_child, last_child;
 298
 299         index = strlen(pre);
 300         printf(" %s", pre);
 301         /* check if the device has connected children */
 302         has_child = 0;
 303         for (i = 0; i < dev->maxchild; i++) {
 304                 if (dev->children[i] != NULL)
 305                         has_child = 1;
 306         }
 307         /* check if we are the last one */
 308         last_child = 1;
 309         if (dev->parent != NULL) {
 310                 for (i = 0; i < dev->parent->maxchild; i++) {
 311                         /* search for children */
 312                         if (dev->parent->children[i] == dev) {
 313                                 /* found our pointer, see if we have a
 314                                  * little sister
 315                                  */
 316                                 while (i++ < dev->parent->maxchild) {
 317                                         if (dev->parent->children[i] != NULL) {
 318                                                 /* found a sister */
 319                                                 last_child = 0;
 320                                                 break;
 321                                         } /* if */
 322                                 } /* while */
 323                         } /* device found */
 324                 } /* for all children of the parent */
 325                 printf("\b+-");
 326                 /* correct last child */
 327                 if (last_child)
 328                         pre[index-1] = ' ';
 329         } /* if not root hub */
 330         else
 331                 printf(" ");
 332         printf("%d ", dev->devnum);
 333         pre[index++] = ' ';
 334         pre[index++] = has_child ? '|' : ' ';
 335         pre[index] = 0;
 336         printf(" %s (%s, %dmA)\n", usb_get_class_desc(
 337                                         dev->config.if_desc[0].desc.bInterfaceClass),
 338                                         portspeed(dev->speed),
 339                                         dev->config.desc.bMaxPower * 2);
 340         if (strlen(dev->mf) || strlen(dev->prod) || strlen(dev->serial))
 341                 printf(" %s  %s %s %s\n", pre, dev->mf, dev->prod, dev->serial);
 342         printf(" %s\n", pre);
 343         if (dev->maxchild > 0) {
 344                 for (i = 0; i < dev->maxchild; i++) {
 345                         if (dev->children[i] != NULL) {
 346                                 usb_show_tree_graph(dev->children[i], pre);
 347                                 pre[index] = 0;
 348                         }
 349                 }
 350         }
 351 }
 352
 353 /* main routine for the tree command */
 354 static void usb_show_tree(struct usb_device *dev)
 355 {
 356         char preamble[32];
 357
 358         memset(preamble, 0, 32);
 359         usb_show_tree_graph(dev, &preamble[0]);
 360 }
 361
 362 static int usb_test(struct usb_device *dev, int port, char* arg)
 363 {
 364         int mode;
 365
 366         if (port > dev->maxchild) {
 367                 printf("Device is no hub or does not have %d ports.\n", port);
 368                 return 1;
 369         }
 370
 371         switch (arg[0]) {
 372         case 'J':
 373         case 'j':
 374                 printf("Setting Test_J mode");
 375                 mode = USB_TEST_MODE_J;
 376                 break;
 377         case 'K':
 378         case 'k':
 379                 printf("Setting Test_K mode");
 380                 mode = USB_TEST_MODE_K;
 381                 break;
 382         case 'S':
 383         case 's':
 384                 printf("Setting Test_SE0_NAK mode");
 385                 mode = USB_TEST_MODE_SE0_NAK;
 386                 break;
 387         case 'P':
 388         case 'p':
 389                 printf("Setting Test_Packet mode");
 390                 mode = USB_TEST_MODE_PACKET;
 391                 break;
 392         case 'F':
 393         case 'f':
 394                 printf("Setting Test_Force_Enable mode");
 395                 mode = USB_TEST_MODE_FORCE_ENABLE;
 396                 break;
 397         default:
 398                 printf("Unrecognized test mode: %s\nAvailable modes: "
 399                        "J, K, S[E0_NAK], P[acket], F[orce_Enable]\n", arg);
 400                 return 1;
 401         }
 402
 403         if (port)
 404                 printf(" on downstream facing port %d...\n", port);
 405         else
 406                 printf(" on upstream facing port...\n");
 407
 408         if (usb_control_msg(dev, usb_sndctrlpipe(dev, 0), USB_REQ_SET_FEATURE,
 409                             port ? USB_RT_PORT : USB_RECIP_DEVICE,
 410                             port ? USB_PORT_FEAT_TEST : USB_FEAT_TEST,
 411                             (mode << 8) | port,
 412                             NULL, 0, USB_CNTL_TIMEOUT) == -1) {
 413                 printf("Error during SET_FEATURE.\n");
 414                 return 1;
 415         } else {
 416                 printf("Test mode successfully set. Use 'usb start' "
 417                        "to return to normal operation.\n");
 418                 return 0;
 419         }
 420 }
 421
 422
 423 /******************************************************************************
 424  * usb boot command intepreter. Derived from diskboot
 425  */
 426 #ifdef CONFIG_USB_STORAGE
 427 static int do_usbboot(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 428 {
 429         return common_diskboot(cmdtp, "usb", argc, argv);
 430 }
 431 #endif /* CONFIG_USB_STORAGE */
 432
 433 static int do_usb_stop_keyboard(int force)
 434 {
 435 #ifdef CONFIG_USB_KEYBOARD
 436         if (usb_kbd_deregister(force) != 0) {
 437                 printf("USB not stopped: usbkbd still using USB\n");
 438                 return 1;
 439         }
 440 #endif
 441         return 0;
 442 }
 443
 444 static void do_usb_start(void)
 445 {
 446         bootstage_mark_name(BOOTSTAGE_ID_USB_START, "usb_start");
 447
 448         if (usb_init() < 0)
 449                 return;
 450
 451 #ifdef CONFIG_USB_STORAGE
 452         /* try to recognize storage devices immediately */
 453         usb_stor_curr_dev = usb_stor_scan(1);
 454 #endif
 455 #ifdef CONFIG_USB_HOST_ETHER
 456         /* try to recognize ethernet devices immediately */
 457         usb_ether_curr_dev = usb_host_eth_scan(1);
 458 #endif
 459 #ifdef CONFIG_USB_KEYBOARD
 460         drv_usb_kbd_init();
 461 #endif
 462 }
 463
 464 /******************************************************************************
 465  * usb command intepreter
 466  */
 467 static int do_usb(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 468 {
 469
 470         int i;
 471         struct usb_device *dev = NULL;
 472         extern char usb_started;
 473 #ifdef CONFIG_USB_STORAGE
 474         block_dev_desc_t *stor_dev;
 475 #endif
 476
 477         if (argc < 2)
 478                 return CMD_RET_USAGE;
 479
 480         if (strncmp(argv[1], "start", 5) == 0) {
 481                 if (usb_started)
 482                         return 0; /* Already started */
 483                 printf("starting USB...\n");
 484                 do_usb_start();
 485                 return 0;
 486         }
 487
 488         if (strncmp(argv[1], "reset", 5) == 0) {
 489                 printf("resetting USB...\n");
 490                 if (do_usb_stop_keyboard(1) != 0)
 491                         return 1;
 492                 usb_stop();
 493                 do_usb_start();
 494                 return 0;
 495         }
 496         if (strncmp(argv[1], "stop", 4) == 0) {
 497                 if (argc != 2)
 498                         console_assign(stdin, "serial");
 499                 if (do_usb_stop_keyboard(0) != 0)
 500                         return 1;
 501                 printf("stopping USB..\n");
 502                 usb_stop();
 503                 return 0;
 504         }
 505         if (!usb_started) {
 506                 printf("USB is stopped. Please issue 'usb start' first.\n");
 507                 return 1;
 508         }
 509         if (strncmp(argv[1], "tree", 4) == 0) {
 510                 puts("USB device tree:\n");
 511                 for (i = 0; i < USB_MAX_DEVICE; i++) {
 512                         dev = usb_get_dev_index(i);
 513                         if (dev == NULL)
 514                                 break;
 515                         if (dev->parent == NULL)
 516                                 usb_show_tree(dev);
 517                 }
 518                 return 0;
 519         }
 520         if (strncmp(argv[1], "inf", 3) == 0) {
 521                 int d;
 522                 if (argc == 2) {
 523                         for (d = 0; d < USB_MAX_DEVICE; d++) {
 524                                 dev = usb_get_dev_index(d);
 525                                 if (dev == NULL)
 526                                         break;
 527                                 usb_display_desc(dev);
 528                                 usb_display_config(dev);
 529                         }
 530                         return 0;
 531                 } else {
 532                         i = simple_strtoul(argv[2], NULL, 10);
 533                         printf("config for device %d\n", i);
 534                         dev = usb_find_device(i);
 535                         if (dev == NULL) {
 536                                 printf("*** No device available ***\n");
 537                                 return 0;
 538                         } else {
 539                                 usb_display_desc(dev);
 540                                 usb_display_config(dev);
 541                         }
 542                 }
 543                 return 0;
 544         }
 545         if (strncmp(argv[1], "test", 4) == 0) {
 546                 if (argc < 5)
 547                         return CMD_RET_USAGE;
 548                 i = simple_strtoul(argv[2], NULL, 10);
 549                 dev = usb_find_device(i);
 550                 if (dev == NULL) {
 551                         printf("Device %d does not exist.\n", i);
 552                         return 1;
 553                 }
 554                 i = simple_strtoul(argv[3], NULL, 10);
 555                 return usb_test(dev, i, argv[4]);
 556         }
 557 #ifdef CONFIG_USB_STORAGE
 558         if (strncmp(argv[1], "stor", 4) == 0)
 559                 return usb_stor_info();
 560
 561         if (strncmp(argv[1], "part", 4) == 0) {
 562                 int devno, ok = 0;
 563                 if (argc == 2) {
 564                         for (devno = 0; ; ++devno) {
 565                                 stor_dev = usb_stor_get_dev(devno);
 566                                 if (stor_dev == NULL)
 567                                         break;
 568                                 if (stor_dev->type != DEV_TYPE_UNKNOWN) {
 569                                         ok++;
 570                                         if (devno)
 571                                                 printf("\n");
 572                                         debug("print_part of %x\n", devno);
 573                                         print_part(stor_dev);
 574                                 }
 575                         }
 576                 } else {
 577                         devno = simple_strtoul(argv[2], NULL, 16);
 578                         stor_dev = usb_stor_get_dev(devno);
 579                         if (stor_dev != NULL &&
 580                             stor_dev->type != DEV_TYPE_UNKNOWN) {
 581                                 ok++;
 582                                 debug("print_part of %x\n", devno);
 583                                 print_part(stor_dev);
 584                         }
 585                 }
 586                 if (!ok) {
 587                         printf("\nno USB devices available\n");
 588                         return 1;
 589                 }
 590                 return 0;
 591         }
 592         if (strcmp(argv[1], "read") == 0) {
 593                 if (usb_stor_curr_dev < 0) {
 594                         printf("no current device selected\n");
 595                         return 1;
 596                 }
 597                 if (argc == 5) {
 598                         unsigned long addr = simple_strtoul(argv[2], NULL, 16);
 599                         unsigned long blk  = simple_strtoul(argv[3], NULL, 16);
 600                         unsigned long cnt  = simple_strtoul(argv[4], NULL, 16);
 601                         unsigned long n;
 602                         printf("\nUSB read: device %d block # %ld, count %ld"
 603                                 " ... ", usb_stor_curr_dev, blk, cnt);
 604                         stor_dev = usb_stor_get_dev(usb_stor_curr_dev);
 605                         n = stor_dev->block_read(usb_stor_curr_dev, blk, cnt,
 606                                                  (ulong *)addr);
 607                         printf("%ld blocks read: %s\n", n,
 608                                 (n == cnt) ? "OK" : "ERROR");
 609                         if (n == cnt)
 610                                 return 0;
 611                         return 1;
 612                 }
 613         }
 614         if (strcmp(argv[1], "write") == 0) {
 615                 if (usb_stor_curr_dev < 0) {
 616                         printf("no current device selected\n");
 617                         return 1;
 618                 }
 619                 if (argc == 5) {
 620                         unsigned long addr = simple_strtoul(argv[2], NULL, 16);
 621                         unsigned long blk  = simple_strtoul(argv[3], NULL, 16);
 622                         unsigned long cnt  = simple_strtoul(argv[4], NULL, 16);
 623                         unsigned long n;
 624                         printf("\nUSB write: device %d block # %ld, count %ld"
 625                                 " ... ", usb_stor_curr_dev, blk, cnt);
 626                         stor_dev = usb_stor_get_dev(usb_stor_curr_dev);
 627                         n = stor_dev->block_write(usb_stor_curr_dev, blk, cnt,
 628                                                 (ulong *)addr);
 629                         printf("%ld blocks write: %s\n", n,
 630                                 (n == cnt) ? "OK" : "ERROR");
 631                         if (n == cnt)
 632                                 return 0;
 633                         return 1;
 634                 }
 635         }
 636         if (strncmp(argv[1], "dev", 3) == 0) {
 637                 if (argc == 3) {
 638                         int dev = (int)simple_strtoul(argv[2], NULL, 10);
 639                         printf("\nUSB device %d: ", dev);
 640                         stor_dev = usb_stor_get_dev(dev);
 641                         if (stor_dev == NULL) {
 642                                 printf("unknown device\n");
 643                                 return 1;
 644                         }
 645                         printf("\n    Device %d: ", dev);
 646                         dev_print(stor_dev);
 647                         if (stor_dev->type == DEV_TYPE_UNKNOWN)
 648                                 return 1;
 649                         usb_stor_curr_dev = dev;
 650                         printf("... is now current device\n");
 651                         return 0;
 652                 } else {
 653                         printf("\nUSB device %d: ", usb_stor_curr_dev);
 654                         stor_dev = usb_stor_get_dev(usb_stor_curr_dev);
 655                         dev_print(stor_dev);
 656                         if (stor_dev->type == DEV_TYPE_UNKNOWN)
 657                                 return 1;
 658                         return 0;
 659                 }
 660                 return 0;
 661         }
 662 #endif /* CONFIG_USB_STORAGE */
 663         return CMD_RET_USAGE;
 664 }
 665
 666 U_BOOT_CMD(
 667         usb,    5,      1,      do_usb,
 668         "USB sub-system",
 669         "start - start (scan) USB controller\n"
 670         "usb reset - reset (rescan) USB controller\n"
 671         "usb stop [f] - stop USB [f]=force stop\n"
 672         "usb tree - show USB device tree\n"
 673         "usb info [dev] - show available USB devices\n"
 674         "usb test [dev] [port] [mode] - set USB 2.0 test mode\n"
 675         "    (specify port 0 to indicate the device's upstream port)\n"
 676         "    Available modes: J, K, S[E0_NAK], P[acket], F[orce_Enable]\n"
 677 #ifdef CONFIG_USB_STORAGE
 678         "usb storage - show details of USB storage devices\n"
 679         "usb dev [dev] - show or set current USB storage device\n"
 680         "usb part [dev] - print partition table of one or all USB storage"
 681         "    devices\n"
 682         "usb read addr blk# cnt - read `cnt' blocks starting at block `blk#'\n"
 683         "    to memory address `addr'\n"
 684         "usb write addr blk# cnt - write `cnt' blocks starting at block `blk#'\n"
 685         "    from memory address `addr'"
 686 #endif /* CONFIG_USB_STORAGE */
 687 );
 688
 689
 690 #ifdef CONFIG_USB_STORAGE
 691 U_BOOT_CMD(
 692         usbboot,        3,      1,      do_usbboot,
 693         "boot from USB device",
 694         "loadAddr dev:part"
 695 );
 696 #endif /* CONFIG_USB_STORAGE */