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