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  * See file CREDITS for list of people who contributed to this
   9  * project.
  10  *
  11  * This program is free software; you can redistribute it and/or
  12  * modify it under the terms of the GNU General Public License as
  13  * published by the Free Software Foundation; either version 2 of
  14  * the License, or (at your option) any later version.
  15  *
  16  * This program is distributed in the hope that it will be useful,
  17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19  * GNU General Public License for more details.
  20  *
  21  * You should have received a copy of the GNU General Public License
  22  * along with this program; if not, write to the Free Software
  23  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  24  * MA 02111-1307 USA
  25  *
  26  */
  27
  28 #include <common.h>
  29 #include <command.h>
  30 #include <asm/byteorder.h>
  31
  32 #if (CONFIG_COMMANDS & CFG_CMD_USB)
  33
  34 #include <usb.h>
  35
  36 #ifdef CONFIG_USB_STORAGE
  37 static int usb_stor_curr_dev=-1; /* current device */
  38 #endif
  39
  40 /* some display routines (info command) */
  41 char * usb_get_class_desc(unsigned char dclass)
  42 {
  43         switch(dclass) {
  44                 case USB_CLASS_PER_INTERFACE:
  45                         return("See Interface");
  46                 case USB_CLASS_AUDIO:
  47                         return("Audio");
  48                 case USB_CLASS_COMM:
  49                         return("Communication");
  50                 case USB_CLASS_HID:
  51                         return("Human Interface");
  52                 case USB_CLASS_PRINTER:
  53                         return("Printer");
  54                 case USB_CLASS_MASS_STORAGE:
  55                         return("Mass Storage");
  56                 case USB_CLASS_HUB:
  57                         return("Hub");
  58                 case USB_CLASS_DATA:
  59                         return("CDC Data");
  60                 case USB_CLASS_VENDOR_SPEC:
  61                         return("Vendor specific");
  62                 default :
  63                         return("");
  64         }
  65 }
  66
  67 void usb_display_class_sub(unsigned char dclass,unsigned char subclass,unsigned char proto)
  68 {
  69         switch(dclass) {
  70                 case USB_CLASS_PER_INTERFACE:
  71                         printf("See Interface");
  72                         break;
  73                 case USB_CLASS_HID:
  74                         printf("Human Interface, Subclass: ");
  75                         switch(subclass) {
  76                                 case USB_SUB_HID_NONE:
  77                                         printf("None");
  78                                         break;
  79                                 case USB_SUB_HID_BOOT:
  80                                         printf("Boot ");
  81                                         switch(proto) {
  82                                                 case USB_PROT_HID_NONE:
  83                                                         printf("None");
  84                                                         break;
  85                                                 case USB_PROT_HID_KEYBOARD:
  86                                                         printf("Keyboard");
  87                                                         break;
  88                                                 case USB_PROT_HID_MOUSE:
  89                                                         printf("Mouse");
  90                                                         break;
  91                                                 default:
  92                                                         printf("reserved");
  93                                         }
  94                                         break;
  95                                 default:
  96                                         printf("reserved");
  97                         }
  98                         break;
  99                 case USB_CLASS_MASS_STORAGE:
 100                         printf("Mass Storage, ");
 101                         switch(subclass) {
 102                                 case US_SC_RBC:
 103                                         printf("RBC ");
 104                                         break;
 105                                 case US_SC_8020:
 106                                         printf("SFF-8020i (ATAPI)");
 107                                         break;
 108                                 case US_SC_QIC:
 109                                         printf("QIC-157 (Tape)");
 110                                         break;
 111                                 case US_SC_UFI:
 112                                         printf("UFI");
 113                                         break;
 114                                 case US_SC_8070:
 115                                         printf("SFF-8070");
 116                                         break;
 117                                 case US_SC_SCSI:
 118                                         printf("Transp. SCSI");
 119                                         break;
 120                                 default:
 121                                         printf("reserved");
 122                                         break;
 123                         }
 124                         printf(", ");
 125                         switch(proto) {
 126                                 case US_PR_CB:
 127                                         printf("Command/Bulk");
 128                                         break;
 129                                 case US_PR_CBI:
 130                                         printf("Command/Bulk/Int");
 131                                         break;
 132                                 case US_PR_BULK:
 133                                         printf("Bulk only");
 134                                         break;
 135                                 default:
 136                                         printf("reserved");
 137                         }
 138                         break;
 139                 default:
 140                         printf("%s",usb_get_class_desc(dclass));
 141         }
 142 }
 143
 144 void usb_display_string(struct usb_device *dev,int index)
 145 {
 146         char buffer[256];
 147         if (index!=0) {
 148                 if (usb_string(dev,index,&buffer[0],256)>0);
 149                         printf("String: \"%s\"",buffer);
 150         }
 151 }
 152
 153 void usb_display_desc(struct usb_device *dev)
 154 {
 155         if (dev->descriptor.bDescriptorType==USB_DT_DEVICE) {
 156                 printf("%d: %s,  USB Revision %x.%x\n",dev->devnum,usb_get_class_desc(dev->config.if_desc[0].bInterfaceClass),
 157                         (dev->descriptor.bcdUSB>>8) & 0xff,dev->descriptor.bcdUSB & 0xff);
 158                 if (strlen(dev->mf) || strlen(dev->prod) || strlen(dev->serial))
 159                         printf(" - %s %s %s\n",dev->mf,dev->prod,dev->serial);
 160                 if (dev->descriptor.bDeviceClass) {
 161                         printf(" - Class: ");
 162                         usb_display_class_sub(dev->descriptor.bDeviceClass,dev->descriptor.bDeviceSubClass,dev->descriptor.bDeviceProtocol);
 163                         printf("\n");
 164                 }
 165                 else {
 166                         printf(" - Class: (from Interface) %s\n",usb_get_class_desc(dev->config.if_desc[0].bInterfaceClass));
 167                 }
 168                 printf(" - PacketSize: %d  Configurations: %d\n",dev->descriptor.bMaxPacketSize0,dev->descriptor.bNumConfigurations);
 169                 printf(" - Vendor: 0x%04x  Product 0x%04x Version %d.%d\n",dev->descriptor.idVendor,dev->descriptor.idProduct,(dev->descriptor.bcdDevice>>8) & 0xff,dev->descriptor.bcdDevice & 0xff);
 170         }
 171
 172 }
 173
 174 void usb_display_conf_desc(struct usb_config_descriptor *config,struct usb_device *dev)
 175 {
 176         printf("   Configuration: %d\n",config->bConfigurationValue);
 177         printf("   - Interfaces: %d %s%s%dmA\n",config->bNumInterfaces,(config->bmAttributes & 0x40) ? "Self Powered " : "Bus Powered ",
 178         (config->bmAttributes & 0x20) ? "Remote Wakeup " : "",config->MaxPower*2);
 179         if (config->iConfiguration) {
 180                 printf("   - ");
 181                 usb_display_string(dev,config->iConfiguration);
 182                 printf("\n");
 183         }
 184 }
 185
 186 void usb_display_if_desc(struct usb_interface_descriptor *ifdesc,struct usb_device *dev)
 187 {
 188         printf("     Interface: %d\n",ifdesc->bInterfaceNumber);
 189         printf("     - Alternate Setting %d, Endpoints: %d\n",ifdesc->bAlternateSetting,ifdesc->bNumEndpoints);
 190         printf("     - Class ");
 191         usb_display_class_sub(ifdesc->bInterfaceClass,ifdesc->bInterfaceSubClass,ifdesc->bInterfaceProtocol);
 192         printf("\n");
 193         if (ifdesc->iInterface) {
 194                 printf("     - ");
 195                 usb_display_string(dev,ifdesc->iInterface);
 196                 printf("\n");
 197         }
 198 }
 199
 200 void usb_display_ep_desc(struct usb_endpoint_descriptor *epdesc)
 201 {
 202         printf("     - Endpoint %d %s ",epdesc->bEndpointAddress & 0xf,(epdesc->bEndpointAddress & 0x80) ? "In" : "Out");
 203         switch((epdesc->bmAttributes & 0x03))
 204         {
 205                 case 0: printf("Control"); break;
 206                 case 1: printf("Isochronous"); break;
 207                 case 2: printf("Bulk"); break;
 208                 case 3: printf("Interrupt"); break;
 209         }
 210         printf(" MaxPacket %d",epdesc->wMaxPacketSize);
 211         if ((epdesc->bmAttributes & 0x03)==0x3)
 212                 printf(" Interval %dms",epdesc->bInterval);
 213         printf("\n");
 214 }
 215
 216 /* main routine to diasplay the configs, interfaces and endpoints */
 217 void usb_display_config(struct usb_device *dev)
 218 {
 219         struct usb_config_descriptor *config;
 220         struct usb_interface_descriptor *ifdesc;
 221         struct usb_endpoint_descriptor *epdesc;
 222         int i,ii;
 223
 224         config= &dev->config;
 225         usb_display_conf_desc(config,dev);
 226         for(i=0;i<config->no_of_if;i++) {
 227                 ifdesc= &config->if_desc[i];
 228                 usb_display_if_desc(ifdesc,dev);
 229                 for(ii=0;ii<ifdesc->no_of_ep;ii++) {
 230                         epdesc= &ifdesc->ep_desc[ii];
 231                         usb_display_ep_desc(epdesc);
 232                 }
 233         }
 234         printf("\n");
 235 }
 236
 237 /* shows the device tree recursively */
 238 void usb_show_tree_graph(struct usb_device *dev,char *pre)
 239 {
 240         int i,index;
 241         int has_child,last_child,port;
 242
 243         index=strlen(pre);
 244         printf(" %s",pre);
 245         /* check if the device has connected children */
 246         has_child=0;
 247         for(i=0;i<dev->maxchild;i++) {
 248                 if (dev->children[i]!=NULL)
 249                         has_child=1;
 250         }
 251         /* check if we are the last one */
 252         last_child=1;
 253         if (dev->parent!=NULL) {
 254                 for(i=0;i<dev->parent->maxchild;i++) {
 255                         /* search for children */
 256                         if (dev->parent->children[i]==dev) {
 257                                 /* found our pointer, see if we have a little sister */
 258                                 port=i;
 259                                 while(i++<dev->parent->maxchild) {
 260                                         if (dev->parent->children[i]!=NULL) {
 261                                                 /* found a sister */
 262                                                 last_child=0;
 263                                                 break;
 264                                         } /* if */
 265                                 } /* while */
 266                         } /* device found */
 267                 } /* for all children of the parent */
 268                 printf("\b+-");
 269                 /* correct last child */
 270                 if (last_child) {
 271                         pre[index-1]=' ';
 272                 }
 273         } /* if not root hub */
 274         else
 275                 printf(" ");
 276         printf("%d ",dev->devnum);
 277         pre[index++]=' ';
 278         pre[index++]= has_child ? '|' : ' ';
 279         pre[index]=0;
 280         printf(" %s (%s, %dmA)\n",usb_get_class_desc(dev->config.if_desc[0].bInterfaceClass),
 281                 dev->slow ? "1.5MBit/s" : "12MBit/s",dev->config.MaxPower * 2);
 282         if (strlen(dev->mf) ||
 283            strlen(dev->prod) ||
 284            strlen(dev->serial))
 285                 printf(" %s  %s %s %s\n",pre,dev->mf,dev->prod,dev->serial);
 286         printf(" %s\n",pre);
 287         if (dev->maxchild>0) {
 288                 for(i=0;i<dev->maxchild;i++) {
 289                         if (dev->children[i]!=NULL) {
 290                                 usb_show_tree_graph(dev->children[i],pre);
 291                                 pre[index]=0;
 292                         }
 293                 }
 294         }
 295 }
 296
 297 /* main routine for the tree command */
 298 void usb_show_tree(struct usb_device *dev)
 299 {
 300         char preamble[32];
 301
 302         memset(preamble,0,32);
 303         usb_show_tree_graph(dev,&preamble[0]);
 304 }
 305
 306
 307 /******************************************************************************
 308  * usb boot command intepreter. Derived from diskboot
 309  */
 310 #ifdef CONFIG_USB_STORAGE
 311 int do_usbboot (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
 312 {
 313         char *boot_device = NULL;
 314         char *ep;
 315         int dev, part=1, rcode;
 316         ulong addr, cnt, checksum;
 317         disk_partition_t info;
 318         image_header_t *hdr;
 319         block_dev_desc_t *stor_dev;
 320
 321
 322         switch (argc) {
 323         case 1:
 324                 addr = CFG_LOAD_ADDR;
 325                 boot_device = getenv ("bootdevice");
 326                 break;
 327         case 2:
 328                 addr = simple_strtoul(argv[1], NULL, 16);
 329                 boot_device = getenv ("bootdevice");
 330                 break;
 331         case 3:
 332                 addr = simple_strtoul(argv[1], NULL, 16);
 333                 boot_device = argv[2];
 334                 break;
 335         default:
 336                 printf ("Usage:\n%s\n", cmdtp->usage);
 337                 return 1;
 338         }
 339
 340         if (!boot_device) {
 341                 puts ("\n** No boot device **\n");
 342                 return 1;
 343         }
 344
 345         dev = simple_strtoul(boot_device, &ep, 16);
 346         stor_dev=usb_stor_get_dev(dev);
 347         if (stor_dev->type == DEV_TYPE_UNKNOWN) {
 348                 printf ("\n** Device %d not available\n", dev);
 349                 return 1;
 350         }
 351         if (stor_dev->block_read==NULL) {
 352                 printf("storage device not initialized. Use usb scan\n");
 353                 return 1;
 354         }
 355         if (*ep) {
 356                 if (*ep != ':') {
 357                         puts ("\n** Invalid boot device, use `dev[:part]' **\n");
 358                         return 1;
 359                 }
 360                 part = simple_strtoul(++ep, NULL, 16);
 361         }
 362
 363         if (get_partition_info (stor_dev, part, &info)) {
 364                 /* try to boot raw .... */
 365                 strncpy((char *)&info.type[0], BOOT_PART_TYPE, sizeof(BOOT_PART_TYPE));
 366                 strncpy((char *)&info.name[0], "Raw", 4);
 367                 info.start=0;
 368                 info.blksz=0x200;
 369                 info.size=2880;
 370                 printf("error reading partinfo...try to boot raw\n");
 371         }
 372         if ((strncmp((char *)info.type, BOOT_PART_TYPE, sizeof(info.type)) != 0) &&
 373             (strncmp((char *)info.type, BOOT_PART_COMP, sizeof(info.type)) != 0)) {
 374                 printf ("\n** Invalid partition type \"%.32s\""
 375                         " (expect \"" BOOT_PART_TYPE "\")\n",
 376                         info.type);
 377                 return 1;
 378         }
 379         printf ("\nLoading from USB device %d, partition %d: "
 380                 "Name: %.32s  Type: %.32s\n",
 381                 dev, part, info.name, info.type);
 382
 383         debug ("First Block: %ld,  # of blocks: %ld, Block Size: %ld\n",
 384                 info.start, info.size, info.blksz);
 385
 386         if (stor_dev->block_read(dev, info.start, 1, (ulong *)addr) != 1) {
 387                 printf ("** Read error on %d:%d\n", dev, part);
 388                 return 1;
 389         }
 390
 391         hdr = (image_header_t *)addr;
 392
 393         if (ntohl(hdr->ih_magic) != IH_MAGIC) {
 394                 printf("\n** Bad Magic Number **\n");
 395                 return 1;
 396         }
 397
 398         checksum = ntohl(hdr->ih_hcrc);
 399         hdr->ih_hcrc = 0;
 400
 401         if (crc32 (0, (uchar *)hdr, sizeof(image_header_t)) != checksum) {
 402                 puts ("\n** Bad Header Checksum **\n");
 403                 return 1;
 404         }
 405         hdr->ih_hcrc = htonl(checksum); /* restore checksum for later use */
 406
 407         print_image_hdr (hdr);
 408
 409         cnt = (ntohl(hdr->ih_size) + sizeof(image_header_t));
 410         cnt += info.blksz - 1;
 411         cnt /= info.blksz;
 412         cnt -= 1;
 413
 414         if (stor_dev->block_read (dev, info.start+1, cnt,
 415                       (ulong *)(addr+info.blksz)) != cnt) {
 416                 printf ("\n** Read error on %d:%d\n", dev, part);
 417                 return 1;
 418         }
 419         /* Loading ok, update default load address */
 420         load_addr = addr;
 421
 422         flush_cache (addr, (cnt+1)*info.blksz);
 423
 424         /* Check if we should attempt an auto-start */
 425         if (((ep = getenv("autostart")) != NULL) && (strcmp(ep,"yes") == 0)) {
 426                 char *local_args[2];
 427                 extern int do_bootm (cmd_tbl_t *, int, int, char *[]);
 428                 local_args[0] = argv[0];
 429                 local_args[1] = NULL;
 430                 printf ("Automatic boot of image at addr 0x%08lX ...\n", addr);
 431                 rcode=do_bootm (cmdtp, 0, 1, local_args);
 432                 return rcode;
 433         }
 434         return 0;
 435 }
 436 #endif /* CONFIG_USB_STORAGE */
 437
 438
 439 /*********************************************************************************
 440  * usb command intepreter
 441  */
 442 int do_usb (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
 443 {
 444
 445         int i;
 446         struct usb_device *dev = NULL;
 447         extern char usb_started;
 448 #ifdef CONFIG_USB_STORAGE
 449         block_dev_desc_t *stor_dev;
 450 #endif
 451
 452         if ((strncmp(argv[1], "reset", 5) == 0) ||
 453                  (strncmp(argv[1], "start", 5) == 0)){
 454                 usb_stop();
 455                 printf("(Re)start USB...\n");
 456                 i = usb_init();
 457 #ifdef CONFIG_USB_STORAGE
 458                 /* try to recognize storage devices immediately */
 459                 if (i >= 0)
 460                         usb_stor_curr_dev = usb_stor_scan(1);
 461 #endif
 462                 return 0;
 463         }
 464         if (strncmp(argv[1],"stop",4) == 0) {
 465 #ifdef CONFIG_USB_KEYBOARD
 466                 if (argc==2) {
 467                         if (usb_kbd_deregister()!=0) {
 468                                 printf("USB not stopped: usbkbd still using USB\n");
 469                                 return 1;
 470                         }
 471                 }
 472                 else { /* forced stop, switch console in to serial */
 473                         console_assign(stdin,"serial");
 474                         usb_kbd_deregister();
 475                 }
 476 #endif
 477                 printf("stopping USB..\n");
 478                 usb_stop();
 479                 return 0;
 480         }
 481         if (!usb_started) {
 482                 printf("USB is stopped. Please issue 'usb start' first.\n");
 483                 return 1;
 484         }
 485         if (strncmp(argv[1],"tree",4) == 0) {
 486                 printf("\nDevice Tree:\n");
 487                 usb_show_tree(usb_get_dev_index(0));
 488                 return 0;
 489         }
 490         if (strncmp(argv[1],"inf",3) == 0) {
 491                 int d;
 492                 if (argc==2) {
 493                         for(d=0;d<USB_MAX_DEVICE;d++) {
 494                                 dev=usb_get_dev_index(d);
 495                                 if (dev==NULL)
 496                                         break;
 497                                 usb_display_desc(dev);
 498                                 usb_display_config(dev);
 499                         }
 500                         return 0;
 501                 }
 502                 else {
 503                         int d;
 504
 505                         i=simple_strtoul(argv[2], NULL, 16);
 506                         printf("config for device %d\n",i);
 507                         for(d=0;d<USB_MAX_DEVICE;d++) {
 508                                 dev=usb_get_dev_index(d);
 509                                 if (dev==NULL)
 510                                         break;
 511                                 if (dev->devnum==i)
 512                                         break;
 513                         }
 514                         if (dev==NULL) {
 515                                 printf("*** NO Device avaiable ***\n");
 516                                 return 0;
 517                         }
 518                         else {
 519                                 usb_display_desc(dev);
 520                                 usb_display_config(dev);
 521                         }
 522                 }
 523                 return 0;
 524         }
 525 #ifdef CONFIG_USB_STORAGE
 526         if (strncmp(argv[1], "scan", 4) == 0) {
 527                 printf("  NOTE: this command is obsolete and will be phased out\n");
 528                 printf("  please use 'usb storage' for USB storage devices information\n\n");
 529                 usb_stor_info();
 530                 return 0;
 531         }
 532
 533         if (strncmp(argv[1], "stor", 4) == 0) {
 534                 usb_stor_info();
 535                 return 0;
 536         }
 537
 538         if (strncmp(argv[1],"part",4) == 0) {
 539                 int devno, ok;
 540                 for (ok=0, devno=0; devno<USB_MAX_STOR_DEV; ++devno) {
 541                         stor_dev=usb_stor_get_dev(devno);
 542                         if (stor_dev->type!=DEV_TYPE_UNKNOWN) {
 543                                 ok++;
 544                                 if (devno)
 545                                         printf("\n");
 546                                 printf("print_part of %x\n",devno);
 547                                 print_part(stor_dev);
 548                         }
 549                 }
 550                 if (!ok) {
 551                         printf("\nno USB devices available\n");
 552                         return 1;
 553                 }
 554                 return 0;
 555         }
 556         if (strcmp(argv[1],"read") == 0) {
 557                 if (usb_stor_curr_dev<0) {
 558                         printf("no current device selected\n");
 559                         return 1;
 560                 }
 561                 if (argc==5) {
 562                         unsigned long addr = simple_strtoul(argv[2], NULL, 16);
 563                         unsigned long blk  = simple_strtoul(argv[3], NULL, 16);
 564                         unsigned long cnt  = simple_strtoul(argv[4], NULL, 16);
 565                         unsigned long n;
 566                         printf ("\nUSB read: device %d block # %ld, count %ld ... ",
 567                                         usb_stor_curr_dev, blk, cnt);
 568                         stor_dev=usb_stor_get_dev(usb_stor_curr_dev);
 569                         n = stor_dev->block_read(usb_stor_curr_dev, blk, cnt, (ulong *)addr);
 570                         printf ("%ld blocks read: %s\n",n,(n==cnt) ? "OK" : "ERROR");
 571                         if (n==cnt)
 572                                 return 0;
 573                         return 1;
 574                 }
 575         }
 576         if (strncmp(argv[1], "dev", 3) == 0) {
 577                 if (argc == 3) {
 578                         int dev = (int)simple_strtoul(argv[2], NULL, 10);
 579                         printf ("\nUSB device %d: ", dev);
 580                         if (dev >= USB_MAX_STOR_DEV) {
 581                                 printf("unknown device\n");
 582                                 return 1;
 583                         }
 584                         printf ("\n    Device %d: ", dev);
 585                         stor_dev=usb_stor_get_dev(dev);
 586                         dev_print(stor_dev);
 587                         if (stor_dev->type == DEV_TYPE_UNKNOWN) {
 588                                 return 1;
 589                         }
 590                         usb_stor_curr_dev = dev;
 591                         printf("... is now current device\n");
 592                         return 0;
 593                 }
 594                 else {
 595                         printf ("\nUSB device %d: ", usb_stor_curr_dev);
 596                         stor_dev=usb_stor_get_dev(usb_stor_curr_dev);
 597                         dev_print(stor_dev);
 598                         if (stor_dev->type == DEV_TYPE_UNKNOWN) {
 599                                 return 1;
 600                         }
 601                         return 0;
 602                 }
 603                 return 0;
 604         }
 605 #endif /* CONFIG_USB_STORAGE */
 606         printf ("Usage:\n%s\n", cmdtp->usage);
 607         return 1;
 608 }
 609
 610
 611 #endif /* (CONFIG_COMMANDS & CFG_CMD_USB) */
 612
 613
 614 #if (CONFIG_COMMANDS & CFG_CMD_USB)
 615
 616 #ifdef CONFIG_USB_STORAGE
 617 U_BOOT_CMD(
 618         usb,    5,      1,      do_usb,
 619         "usb     - USB sub-system\n",
 620         "reset - reset (rescan) USB controller\n"
 621         "usb stop [f]  - stop USB [f]=force stop\n"
 622         "usb tree  - show USB device tree\n"
 623         "usb info [dev] - show available USB devices\n"
 624         "usb storage  - show details of USB storage devices\n"
 625         "usb dev [dev] - show or set current USB storage device\n"
 626         "usb part [dev] - print partition table of one or all USB storage devices\n"
 627         "usb read addr blk# cnt - read `cnt' blocks starting at block `blk#'\n"
 628         "    to memory address `addr'\n"
 629 );
 630
 631
 632 U_BOOT_CMD(
 633         usbboot,        3,      1,      do_usbboot,
 634         "usbboot - boot from USB device\n",
 635         "loadAddr dev:part\n"
 636 );
 637
 638 #else
 639 U_BOOT_CMD(
 640         usb,    5,      1,      do_usb,
 641         "usb     - USB sub-system\n",
 642         "reset - reset (rescan) USB controller\n"
 643         "usb  tree  - show USB device tree\n"
 644         "usb  info [dev] - show available USB devices\n"
 645 );
 646 #endif
 647 #endif