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