cmd/usb.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * (C) Copyright 2001
   4  * Denis Peter, MPL AG Switzerland
   5  *
   6  * Adapted for U-Boot driver model
   7  * (C) Copyright 2015 Google, Inc
   8  *
   9  * Most of this source has been derived from the Linux USB
  10  * project.
  11  */
  12
  13 #include <blk.h>
  14 #include <bootstage.h>
  15 #include <command.h>
  16 #include <console.h>
  17 #include <dm.h>
  18 #include <dm/uclass-internal.h>
  19 #include <memalign.h>
  20 #include <asm/byteorder.h>
  21 #include <asm/unaligned.h>
  22 #include <part.h>
  23 #include <usb.h>
  24
  25 #ifdef CONFIG_USB_STORAGE
  26 static int usb_stor_curr_dev = -1; /* current device */
  27 #endif
  28
  29 /* some display routines (info command) */
  30 static char *usb_get_class_desc(unsigned char dclass)
  31 {
  32         switch (dclass) {
  33         case USB_CLASS_PER_INTERFACE:
  34                 return "See Interface";
  35         case USB_CLASS_AUDIO:
  36                 return "Audio";
  37         case USB_CLASS_COMM:
  38                 return "Communication";
  39         case USB_CLASS_HID:
  40                 return "Human Interface";
  41         case USB_CLASS_PRINTER:
  42                 return "Printer";
  43         case USB_CLASS_MASS_STORAGE:
  44                 return "Mass Storage";
  45         case USB_CLASS_HUB:
  46                 return "Hub";
  47         case USB_CLASS_DATA:
  48                 return "CDC Data";
  49         case USB_CLASS_VENDOR_SPEC:
  50                 return "Vendor specific";
  51         default:
  52                 return "";
  53         }
  54 }
  55
  56 static void usb_display_class_sub(unsigned char dclass, unsigned char subclass,
  57                                   unsigned char proto)
  58 {
  59         switch (dclass) {
  60         case USB_CLASS_PER_INTERFACE:
  61                 printf("See Interface");
  62                 break;
  63         case USB_CLASS_HID:
  64                 printf("Human Interface, Subclass: ");
  65                 switch (subclass) {
  66                 case USB_SUB_HID_NONE:
  67                         printf("None");
  68                         break;
  69                 case USB_SUB_HID_BOOT:
  70                         printf("Boot ");
  71                         switch (proto) {
  72                         case USB_PROT_HID_NONE:
  73                                 printf("None");
  74                                 break;
  75                         case USB_PROT_HID_KEYBOARD:
  76                                 printf("Keyboard");
  77                                 break;
  78                         case USB_PROT_HID_MOUSE:
  79                                 printf("Mouse");
  80                                 break;
  81                         default:
  82                                 printf("reserved");
  83                                 break;
  84                         }
  85                         break;
  86                 default:
  87                         printf("reserved");
  88                         break;
  89                 }
  90                 break;
  91         case USB_CLASS_MASS_STORAGE:
  92                 printf("Mass Storage, ");
  93                 switch (subclass) {
  94                 case US_SC_RBC:
  95                         printf("RBC ");
  96                         break;
  97                 case US_SC_8020:
  98                         printf("SFF-8020i (ATAPI)");
  99                         break;
 100                 case US_SC_QIC:
 101                         printf("QIC-157 (Tape)");
 102                         break;
 103                 case US_SC_UFI:
 104                         printf("UFI");
 105                         break;
 106                 case US_SC_8070:
 107                         printf("SFF-8070");
 108                         break;
 109                 case US_SC_SCSI:
 110                         printf("Transp. SCSI");
 111                         break;
 112                 default:
 113                         printf("reserved");
 114                         break;
 115                 }
 116                 printf(", ");
 117                 switch (proto) {
 118                 case US_PR_CB:
 119                         printf("Command/Bulk");
 120                         break;
 121                 case US_PR_CBI:
 122                         printf("Command/Bulk/Int");
 123                         break;
 124                 case US_PR_BULK:
 125                         printf("Bulk only");
 126                         break;
 127                 default:
 128                         printf("reserved");
 129                         break;
 130                 }
 131                 break;
 132         default:
 133                 printf("%s", usb_get_class_desc(dclass));
 134                 break;
 135         }
 136 }
 137
 138 static void usb_display_string(struct usb_device *dev, int index)
 139 {
 140         ALLOC_CACHE_ALIGN_BUFFER(char, buffer, 256);
 141
 142         if (index != 0) {
 143                 if (usb_string(dev, index, &buffer[0], 256) > 0)
 144                         printf("String: \"%s\"", buffer);
 145         }
 146 }
 147
 148 static void usb_display_desc(struct usb_device *dev)
 149 {
 150         uint packet_size = dev->descriptor.bMaxPacketSize0;
 151
 152         if (dev->descriptor.bDescriptorType == USB_DT_DEVICE) {
 153                 printf("%d: %s,  USB Revision %x.%x\n", dev->devnum,
 154                 usb_get_class_desc(dev->config.if_desc[0].desc.bInterfaceClass),
 155                                    (dev->descriptor.bcdUSB>>8) & 0xff,
 156                                    dev->descriptor.bcdUSB & 0xff);
 157
 158                 if (strlen(dev->mf) || strlen(dev->prod) ||
 159                     strlen(dev->serial))
 160                         printf(" - %s %s %s\n", dev->mf, dev->prod,
 161                                 dev->serial);
 162                 if (dev->descriptor.bDeviceClass) {
 163                         printf(" - Class: ");
 164                         usb_display_class_sub(dev->descriptor.bDeviceClass,
 165                                               dev->descriptor.bDeviceSubClass,
 166                                               dev->descriptor.bDeviceProtocol);
 167                         printf("\n");
 168                 } else {
 169                         printf(" - Class: (from Interface) %s\n",
 170                                usb_get_class_desc(
 171                                 dev->config.if_desc[0].desc.bInterfaceClass));
 172                 }
 173                 if (dev->descriptor.bcdUSB >= cpu_to_le16(0x0300))
 174                         packet_size = 1 << packet_size;
 175                 printf(" - PacketSize: %d  Configurations: %d\n",
 176                         packet_size, dev->descriptor.bNumConfigurations);
 177                 printf(" - Vendor: 0x%04x  Product 0x%04x Version %d.%d\n",
 178                         dev->descriptor.idVendor, dev->descriptor.idProduct,
 179                         (dev->descriptor.bcdDevice>>8) & 0xff,
 180                         dev->descriptor.bcdDevice & 0xff);
 181         }
 182
 183 }
 184
 185 static void usb_display_conf_desc(struct usb_config_descriptor *config,
 186                                   struct usb_device *dev)
 187 {
 188         printf("   Configuration: %d\n", config->bConfigurationValue);
 189         printf("   - Interfaces: %d %s%s%dmA\n", config->bNumInterfaces,
 190                (config->bmAttributes & 0x40) ? "Self Powered " : "Bus Powered ",
 191                (config->bmAttributes & 0x20) ? "Remote Wakeup " : "",
 192                 config->bMaxPower*2);
 193         if (config->iConfiguration) {
 194                 printf("   - ");
 195                 usb_display_string(dev, config->iConfiguration);
 196                 printf("\n");
 197         }
 198 }
 199
 200 static void usb_display_if_desc(struct usb_interface_descriptor *ifdesc,
 201                                 struct usb_device *dev)
 202 {
 203         printf("     Interface: %d\n", ifdesc->bInterfaceNumber);
 204         printf("     - Alternate Setting %d, Endpoints: %d\n",
 205                 ifdesc->bAlternateSetting, ifdesc->bNumEndpoints);
 206         printf("     - Class ");
 207         usb_display_class_sub(ifdesc->bInterfaceClass,
 208                 ifdesc->bInterfaceSubClass, ifdesc->bInterfaceProtocol);
 209         printf("\n");
 210         if (ifdesc->iInterface) {
 211                 printf("     - ");
 212                 usb_display_string(dev, ifdesc->iInterface);
 213                 printf("\n");
 214         }
 215 }
 216
 217 static void usb_display_ep_desc(struct usb_endpoint_descriptor *epdesc)
 218 {
 219         printf("     - Endpoint %d %s ", epdesc->bEndpointAddress & 0xf,
 220                 (epdesc->bEndpointAddress & 0x80) ? "In" : "Out");
 221         switch ((epdesc->bmAttributes & 0x03)) {
 222         case 0:
 223                 printf("Control");
 224                 break;
 225         case 1:
 226                 printf("Isochronous");
 227                 break;
 228         case 2:
 229                 printf("Bulk");
 230                 break;
 231         case 3:
 232                 printf("Interrupt");
 233                 break;
 234         }
 235         printf(" MaxPacket %d", get_unaligned(&epdesc->wMaxPacketSize));
 236         if ((epdesc->bmAttributes & 0x03) == 0x3)
 237                 printf(" Interval %dms", epdesc->bInterval);
 238         printf("\n");
 239 }
 240
 241 /* main routine to diasplay the configs, interfaces and endpoints */
 242 static void usb_display_config(struct usb_device *dev)
 243 {
 244         struct usb_config *config;
 245         struct usb_interface *ifdesc;
 246         struct usb_endpoint_descriptor *epdesc;
 247         int i, ii;
 248
 249         config = &dev->config;
 250         usb_display_conf_desc(&config->desc, dev);
 251         for (i = 0; i < config->no_of_if; i++) {
 252                 ifdesc = &config->if_desc[i];
 253                 usb_display_if_desc(&ifdesc->desc, dev);
 254                 for (ii = 0; ii < ifdesc->no_of_ep; ii++) {
 255                         epdesc = &ifdesc->ep_desc[ii];
 256                         usb_display_ep_desc(epdesc);
 257                 }
 258         }
 259         printf("\n");
 260 }
 261
 262 /*
 263  * With driver model this isn't right since we can have multiple controllers
 264  * and the device numbering starts at 1 on each bus.
 265  * TODO(sjg@chromium.org): Add a way to specify the controller/bus.
 266  */
 267 static struct usb_device *usb_find_device(int devnum)
 268 {
 269 #ifdef CONFIG_DM_USB
 270         struct usb_device *udev;
 271         struct udevice *hub;
 272         struct uclass *uc;
 273         int ret;
 274
 275         /* Device addresses start at 1 */
 276         devnum++;
 277         ret = uclass_get(UCLASS_USB_HUB, &uc);
 278         if (ret)
 279                 return NULL;
 280
 281         uclass_foreach_dev(hub, uc) {
 282                 struct udevice *dev;
 283
 284                 if (!device_active(hub))
 285                         continue;
 286                 udev = dev_get_parent_priv(hub);
 287                 if (udev->devnum == devnum)
 288                         return udev;
 289
 290                 for (device_find_first_child(hub, &dev);
 291                      dev;
 292                      device_find_next_child(&dev)) {
 293                         if (!device_active(hub))
 294                                 continue;
 295
 296                         udev = dev_get_parent_priv(dev);
 297                         if (udev->devnum == devnum)
 298                                 return udev;
 299                 }
 300         }
 301 #else
 302         struct usb_device *udev;
 303         int d;
 304
 305         for (d = 0; d < USB_MAX_DEVICE; d++) {
 306                 udev = usb_get_dev_index(d);
 307                 if (udev == NULL)
 308                         return NULL;
 309                 if (udev->devnum == devnum)
 310                         return udev;
 311         }
 312 #endif
 313
 314         return NULL;
 315 }
 316
 317 static inline const char *portspeed(int speed)
 318 {
 319         switch (speed) {
 320         case USB_SPEED_SUPER:
 321                 return "5 Gb/s";
 322         case USB_SPEED_HIGH:
 323                 return "480 Mb/s";
 324         case USB_SPEED_LOW:
 325                 return "1.5 Mb/s";
 326         default:
 327                 return "12 Mb/s";
 328         }
 329 }
 330
 331 /* shows the device tree recursively */
 332 static void usb_show_tree_graph(struct usb_device *dev, char *pre)
 333 {
 334         int index;
 335         int has_child, last_child;
 336
 337         index = strlen(pre);
 338         printf(" %s", pre);
 339 #ifdef CONFIG_DM_USB
 340         has_child = device_has_active_children(dev->dev);
 341         if (device_get_uclass_id(dev->dev) == UCLASS_MASS_STORAGE) {
 342                 struct udevice *child;
 343
 344                 for (device_find_first_child(dev->dev, &child);
 345                      child;
 346                      device_find_next_child(&child)) {
 347                         if (device_get_uclass_id(child) == UCLASS_BLK)
 348                                 has_child = 0;
 349                 }
 350         }
 351 #else
 352         /* check if the device has connected children */
 353         int i;
 354
 355         has_child = 0;
 356         for (i = 0; i < dev->maxchild; i++) {
 357                 if (dev->children[i] != NULL)
 358                         has_child = 1;
 359         }
 360 #endif
 361         /* check if we are the last one */
 362 #ifdef CONFIG_DM_USB
 363         /* Not the root of the usb tree? */
 364         if (device_get_uclass_id(dev->dev->parent) != UCLASS_USB) {
 365                 last_child = device_is_last_sibling(dev->dev);
 366 #else
 367         if (dev->parent != NULL) { /* not root? */
 368                 last_child = 1;
 369                 for (i = 0; i < dev->parent->maxchild; i++) {
 370                         /* search for children */
 371                         if (dev->parent->children[i] == dev) {
 372                                 /* found our pointer, see if we have a
 373                                  * little sister
 374                                  */
 375                                 while (i++ < dev->parent->maxchild) {
 376                                         if (dev->parent->children[i] != NULL) {
 377                                                 /* found a sister */
 378                                                 last_child = 0;
 379                                                 break;
 380                                         } /* if */
 381                                 } /* while */
 382                         } /* device found */
 383                 } /* for all children of the parent */
 384 #endif
 385                 printf("\b+-");
 386                 /* correct last child */
 387                 if (last_child && index)
 388                         pre[index-1] = ' ';
 389         } /* if not root hub */
 390         else
 391                 printf(" ");
 392         printf("%d ", dev->devnum);
 393         pre[index++] = ' ';
 394         pre[index++] = has_child ? '|' : ' ';
 395         pre[index] = 0;
 396         printf(" %s (%s, %dmA)\n", usb_get_class_desc(
 397                                         dev->config.if_desc[0].desc.bInterfaceClass),
 398                                         portspeed(dev->speed),
 399                                         dev->config.desc.bMaxPower * 2);
 400         if (strlen(dev->mf) || strlen(dev->prod) || strlen(dev->serial))
 401                 printf(" %s  %s %s %s\n", pre, dev->mf, dev->prod, dev->serial);
 402         printf(" %s\n", pre);
 403 #ifdef CONFIG_DM_USB
 404         struct udevice *child;
 405
 406         for (device_find_first_child(dev->dev, &child);
 407              child;
 408              device_find_next_child(&child)) {
 409                 struct usb_device *udev;
 410
 411                 if (!device_active(child))
 412                         continue;
 413
 414                 udev = dev_get_parent_priv(child);
 415
 416                 /*
 417                  * Ignore emulators and block child devices, we only want
 418                  * real devices
 419                  */
 420                 if (udev &&
 421                     (device_get_uclass_id(child) != UCLASS_BOOTDEV) &&
 422                     (device_get_uclass_id(child) != UCLASS_USB_EMUL) &&
 423                     (device_get_uclass_id(child) != UCLASS_BLK)) {
 424                         usb_show_tree_graph(udev, pre);
 425                         pre[index] = 0;
 426                 }
 427         }
 428 #else
 429         if (dev->maxchild > 0) {
 430                 for (i = 0; i < dev->maxchild; i++) {
 431                         if (dev->children[i] != NULL) {
 432                                 usb_show_tree_graph(dev->children[i], pre);
 433                                 pre[index] = 0;
 434                         }
 435                 }
 436         }
 437 #endif
 438 }
 439
 440 /* main routine for the tree command */
 441 static void usb_show_subtree(struct usb_device *dev)
 442 {
 443         char preamble[32];
 444
 445         memset(preamble, '\0', sizeof(preamble));
 446         usb_show_tree_graph(dev, &preamble[0]);
 447 }
 448
 449 #ifdef CONFIG_DM_USB
 450 typedef void (*usb_dev_func_t)(struct usb_device *udev);
 451
 452 static void usb_for_each_root_dev(usb_dev_func_t func)
 453 {
 454         struct udevice *bus;
 455
 456         for (uclass_find_first_device(UCLASS_USB, &bus);
 457                 bus;
 458                 uclass_find_next_device(&bus)) {
 459                 struct usb_device *udev;
 460                 struct udevice *dev;
 461
 462                 if (!device_active(bus))
 463                         continue;
 464
 465                 device_find_first_child(bus, &dev);
 466                 if (dev && device_active(dev)) {
 467                         udev = dev_get_parent_priv(dev);
 468                         func(udev);
 469                 }
 470         }
 471 }
 472 #endif
 473
 474 void usb_show_tree(void)
 475 {
 476 #ifdef CONFIG_DM_USB
 477         usb_for_each_root_dev(usb_show_subtree);
 478 #else
 479         struct usb_device *udev;
 480         int i;
 481
 482         for (i = 0; i < USB_MAX_DEVICE; i++) {
 483                 udev = usb_get_dev_index(i);
 484                 if (udev == NULL)
 485                         break;
 486                 if (udev->parent == NULL)
 487                         usb_show_subtree(udev);
 488         }
 489 #endif
 490 }
 491
 492 static int usb_test(struct usb_device *dev, int port, char* arg)
 493 {
 494         int mode;
 495
 496         if (port > dev->maxchild) {
 497                 printf("Device is no hub or does not have %d ports.\n", port);
 498                 return 1;
 499         }
 500
 501         switch (arg[0]) {
 502         case 'J':
 503         case 'j':
 504                 printf("Setting Test_J mode");
 505                 mode = USB_TEST_MODE_J;
 506                 break;
 507         case 'K':
 508         case 'k':
 509                 printf("Setting Test_K mode");
 510                 mode = USB_TEST_MODE_K;
 511                 break;
 512         case 'S':
 513         case 's':
 514                 printf("Setting Test_SE0_NAK mode");
 515                 mode = USB_TEST_MODE_SE0_NAK;
 516                 break;
 517         case 'P':
 518         case 'p':
 519                 printf("Setting Test_Packet mode");
 520                 mode = USB_TEST_MODE_PACKET;
 521                 break;
 522         case 'F':
 523         case 'f':
 524                 printf("Setting Test_Force_Enable mode");
 525                 mode = USB_TEST_MODE_FORCE_ENABLE;
 526                 break;
 527         default:
 528                 printf("Unrecognized test mode: %s\nAvailable modes: "
 529                        "J, K, S[E0_NAK], P[acket], F[orce_Enable]\n", arg);
 530                 return 1;
 531         }
 532
 533         if (port)
 534                 printf(" on downstream facing port %d...\n", port);
 535         else
 536                 printf(" on upstream facing port...\n");
 537
 538         if (usb_control_msg(dev, usb_sndctrlpipe(dev, 0), USB_REQ_SET_FEATURE,
 539                             port ? USB_RT_PORT : USB_RECIP_DEVICE,
 540                             port ? USB_PORT_FEAT_TEST : USB_FEAT_TEST,
 541                             (mode << 8) | port,
 542                             NULL, 0, USB_CNTL_TIMEOUT) == -1) {
 543                 printf("Error during SET_FEATURE.\n");
 544                 return 1;
 545         } else {
 546                 printf("Test mode successfully set. Use 'usb start' "
 547                        "to return to normal operation.\n");
 548                 return 0;
 549         }
 550 }
 551
 552 /******************************************************************************
 553  * usb boot command intepreter. Derived from diskboot
 554  */
 555 #ifdef CONFIG_USB_STORAGE
 556 static int do_usbboot(struct cmd_tbl *cmdtp, int flag, int argc,
 557                       char *const argv[])
 558 {
 559         return common_diskboot(cmdtp, "usb", argc, argv);
 560 }
 561 #endif /* CONFIG_USB_STORAGE */
 562
 563 static void do_usb_start(void)
 564 {
 565         bootstage_mark_name(BOOTSTAGE_ID_USB_START, "usb_start");
 566
 567         if (usb_init() < 0)
 568                 return;
 569
 570         /* Driver model will probe the devices as they are found */
 571 # ifdef CONFIG_USB_STORAGE
 572         /* try to recognize storage devices immediately */
 573         usb_stor_curr_dev = usb_stor_scan(1);
 574 # endif
 575 }
 576
 577 #ifdef CONFIG_DM_USB
 578 static void usb_show_info(struct usb_device *udev)
 579 {
 580         struct udevice *child;
 581
 582         usb_display_desc(udev);
 583         usb_display_config(udev);
 584         for (device_find_first_child(udev->dev, &child);
 585              child;
 586              device_find_next_child(&child)) {
 587                 if (device_active(child) &&
 588                     (device_get_uclass_id(child) != UCLASS_BOOTDEV) &&
 589                     (device_get_uclass_id(child) != UCLASS_USB_EMUL) &&
 590                     (device_get_uclass_id(child) != UCLASS_BLK)) {
 591                         udev = dev_get_parent_priv(child);
 592                         if (udev)
 593                                 usb_show_info(udev);
 594                 }
 595         }
 596 }
 597 #endif
 598
 599 /******************************************************************************
 600  * usb command intepreter
 601  */
 602 static int do_usb(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
 603 {
 604         struct usb_device *udev = NULL;
 605         int i;
 606
 607         if (argc < 2)
 608                 return CMD_RET_USAGE;
 609
 610         if (strncmp(argv[1], "start", 5) == 0) {
 611                 if (usb_started)
 612                         return 0; /* Already started */
 613                 printf("starting USB...\n");
 614                 do_usb_start();
 615                 return 0;
 616         }
 617
 618         if (strncmp(argv[1], "reset", 5) == 0) {
 619                 printf("resetting USB...\n");
 620                 usb_stop();
 621                 do_usb_start();
 622                 return 0;
 623         }
 624         if (strncmp(argv[1], "stop", 4) == 0) {
 625                 if (argc != 2)
 626                         console_assign(stdin, "serial");
 627                 printf("stopping USB..\n");
 628                 usb_stop();
 629                 return 0;
 630         }
 631         if (!usb_started) {
 632                 printf("USB is stopped. Please issue 'usb start' first.\n");
 633                 return 1;
 634         }
 635         if (strncmp(argv[1], "tree", 4) == 0) {
 636                 puts("USB device tree:\n");
 637                 usb_show_tree();
 638                 return 0;
 639         }
 640         if (strncmp(argv[1], "inf", 3) == 0) {
 641                 if (argc == 2) {
 642 #ifdef CONFIG_DM_USB
 643                         usb_for_each_root_dev(usb_show_info);
 644 #else
 645                         int d;
 646                         for (d = 0; d < USB_MAX_DEVICE; d++) {
 647                                 udev = usb_get_dev_index(d);
 648                                 if (udev == NULL)
 649                                         break;
 650                                 usb_display_desc(udev);
 651                                 usb_display_config(udev);
 652                         }
 653 #endif
 654                         return 0;
 655                 } else {
 656                         /*
 657                          * With driver model this isn't right since we can
 658                          * have multiple controllers and the device numbering
 659                          * starts at 1 on each bus.
 660                          */
 661                         i = dectoul(argv[2], NULL);
 662                         printf("config for device %d\n", i);
 663                         udev = usb_find_device(i);
 664                         if (udev == NULL) {
 665                                 printf("*** No device available ***\n");
 666                                 return 0;
 667                         } else {
 668                                 usb_display_desc(udev);
 669                                 usb_display_config(udev);
 670                         }
 671                 }
 672                 return 0;
 673         }
 674         if (strncmp(argv[1], "test", 4) == 0) {
 675                 if (argc < 5)
 676                         return CMD_RET_USAGE;
 677                 i = dectoul(argv[2], NULL);
 678                 udev = usb_find_device(i);
 679                 if (udev == NULL) {
 680                         printf("Device %d does not exist.\n", i);
 681                         return 1;
 682                 }
 683                 i = dectoul(argv[3], NULL);
 684                 return usb_test(udev, i, argv[4]);
 685         }
 686 #ifdef CONFIG_USB_STORAGE
 687         if (strncmp(argv[1], "stor", 4) == 0)
 688                 return usb_stor_info();
 689
 690         return blk_common_cmd(argc, argv, UCLASS_USB, &usb_stor_curr_dev);
 691 #else
 692         return CMD_RET_USAGE;
 693 #endif /* CONFIG_USB_STORAGE */
 694 }
 695
 696 U_BOOT_CMD(
 697         usb,    5,      1,      do_usb,
 698         "USB sub-system",
 699         "start - start (scan) USB controller\n"
 700         "usb reset - reset (rescan) USB controller\n"
 701         "usb stop [f] - stop USB [f]=force stop\n"
 702         "usb tree - show USB device tree\n"
 703         "usb info [dev] - show available USB devices\n"
 704         "usb test [dev] [port] [mode] - set USB 2.0 test mode\n"
 705         "    (specify port 0 to indicate the device's upstream port)\n"
 706         "    Available modes: J, K, S[E0_NAK], P[acket], F[orce_Enable]\n"
 707 #ifdef CONFIG_USB_STORAGE
 708         "usb storage - show details of USB storage devices\n"
 709         "usb dev [dev] - show or set current USB storage device\n"
 710         "usb part [dev] - print partition table of one or all USB storage"
 711         "    devices\n"
 712         "usb read addr blk# cnt - read `cnt' blocks starting at block `blk#'\n"
 713         "    to memory address `addr'\n"
 714         "usb write addr blk# cnt - write `cnt' blocks starting at block `blk#'\n"
 715         "    from memory address `addr'"
 716 #endif /* CONFIG_USB_STORAGE */
 717 );
 718
 719 #ifdef CONFIG_USB_STORAGE
 720 U_BOOT_CMD(
 721         usbboot,        3,      1,      do_usbboot,
 722         "boot from USB device",
 723         "loadAddr dev:part"
 724 );
 725 #endif /* CONFIG_USB_STORAGE */