common/cmd_usb.c

   1 /*
   2  * (C) Copyright 2001
   3  * Denis Peter, MPL AG Switzerland
   4  *
   5  * Adapted for U-Boot driver model
   6  * (C) Copyright 2015 Google, Inc
   7  *
   8  * Most of this source has been derived from the Linux USB
   9  * project.
  10  *
  11  * SPDX-License-Identifier:     GPL-2.0+
  12  */
  13
  14 #include <common.h>
  15 #include <command.h>
  16 #include <dm.h>
  17 #include <asm/byteorder.h>
  18 #include <asm/unaligned.h>
  19 #include <part.h>
  20 #include <usb.h>
  21
  22 #ifdef CONFIG_USB_STORAGE
  23 static int usb_stor_curr_dev = -1; /* current device */
  24 #endif
  25 #ifdef CONFIG_USB_HOST_ETHER
  26 static int usb_ether_curr_dev = -1; /* current ethernet 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         if (dev->descriptor.bDescriptorType == USB_DT_DEVICE) {
 151                 printf("%d: %s,  USB Revision %x.%x\n", dev->devnum,
 152                 usb_get_class_desc(dev->config.if_desc[0].desc.bInterfaceClass),
 153                                    (dev->descriptor.bcdUSB>>8) & 0xff,
 154                                    dev->descriptor.bcdUSB & 0xff);
 155
 156                 if (strlen(dev->mf) || strlen(dev->prod) ||
 157                     strlen(dev->serial))
 158                         printf(" - %s %s %s\n", dev->mf, dev->prod,
 159                                 dev->serial);
 160                 if (dev->descriptor.bDeviceClass) {
 161                         printf(" - Class: ");
 162                         usb_display_class_sub(dev->descriptor.bDeviceClass,
 163                                               dev->descriptor.bDeviceSubClass,
 164                                               dev->descriptor.bDeviceProtocol);
 165                         printf("\n");
 166                 } else {
 167                         printf(" - Class: (from Interface) %s\n",
 168                                usb_get_class_desc(
 169                                 dev->config.if_desc[0].desc.bInterfaceClass));
 170                 }
 171                 printf(" - PacketSize: %d  Configurations: %d\n",
 172                         dev->descriptor.bMaxPacketSize0,
 173                         dev->descriptor.bNumConfigurations);
 174                 printf(" - Vendor: 0x%04x  Product 0x%04x Version %d.%d\n",
 175                         dev->descriptor.idVendor, dev->descriptor.idProduct,
 176                         (dev->descriptor.bcdDevice>>8) & 0xff,
 177                         dev->descriptor.bcdDevice & 0xff);
 178         }
 179
 180 }
 181
 182 static void usb_display_conf_desc(struct usb_config_descriptor *config,
 183                                   struct usb_device *dev)
 184 {
 185         printf("   Configuration: %d\n", config->bConfigurationValue);
 186         printf("   - Interfaces: %d %s%s%dmA\n", config->bNumInterfaces,
 187                (config->bmAttributes & 0x40) ? "Self Powered " : "Bus Powered ",
 188                (config->bmAttributes & 0x20) ? "Remote Wakeup " : "",
 189                 config->bMaxPower*2);
 190         if (config->iConfiguration) {
 191                 printf("   - ");
 192                 usb_display_string(dev, config->iConfiguration);
 193                 printf("\n");
 194         }
 195 }
 196
 197 static void usb_display_if_desc(struct usb_interface_descriptor *ifdesc,
 198                                 struct usb_device *dev)
 199 {
 200         printf("     Interface: %d\n", ifdesc->bInterfaceNumber);
 201         printf("     - Alternate Setting %d, Endpoints: %d\n",
 202                 ifdesc->bAlternateSetting, ifdesc->bNumEndpoints);
 203         printf("     - Class ");
 204         usb_display_class_sub(ifdesc->bInterfaceClass,
 205                 ifdesc->bInterfaceSubClass, ifdesc->bInterfaceProtocol);
 206         printf("\n");
 207         if (ifdesc->iInterface) {
 208                 printf("     - ");
 209                 usb_display_string(dev, ifdesc->iInterface);
 210                 printf("\n");
 211         }
 212 }
 213
 214 static void usb_display_ep_desc(struct usb_endpoint_descriptor *epdesc)
 215 {
 216         printf("     - Endpoint %d %s ", epdesc->bEndpointAddress & 0xf,
 217                 (epdesc->bEndpointAddress & 0x80) ? "In" : "Out");
 218         switch ((epdesc->bmAttributes & 0x03)) {
 219         case 0:
 220                 printf("Control");
 221                 break;
 222         case 1:
 223                 printf("Isochronous");
 224                 break;
 225         case 2:
 226                 printf("Bulk");
 227                 break;
 228         case 3:
 229                 printf("Interrupt");
 230                 break;
 231         }
 232         printf(" MaxPacket %d", get_unaligned(&epdesc->wMaxPacketSize));
 233         if ((epdesc->bmAttributes & 0x03) == 0x3)
 234                 printf(" Interval %dms", epdesc->bInterval);
 235         printf("\n");
 236 }
 237
 238 /* main routine to diasplay the configs, interfaces and endpoints */
 239 static void usb_display_config(struct usb_device *dev)
 240 {
 241         struct usb_config *config;
 242         struct usb_interface *ifdesc;
 243         struct usb_endpoint_descriptor *epdesc;
 244         int i, ii;
 245
 246         config = &dev->config;
 247         usb_display_conf_desc(&config->desc, dev);
 248         for (i = 0; i < config->no_of_if; i++) {
 249                 ifdesc = &config->if_desc[i];
 250                 usb_display_if_desc(&ifdesc->desc, dev);
 251                 for (ii = 0; ii < ifdesc->no_of_ep; ii++) {
 252                         epdesc = &ifdesc->ep_desc[ii];
 253                         usb_display_ep_desc(epdesc);
 254                 }
 255         }
 256         printf("\n");
 257 }
 258
 259 /*
 260  * With driver model this isn't right since we can have multiple controllers
 261  * and the device numbering starts at 1 on each bus.
 262  * TODO(sjg@chromium.org): Add a way to specify the controller/bus.
 263  */
 264 static struct usb_device *usb_find_device(int devnum)
 265 {
 266 #ifdef CONFIG_DM_USB
 267         struct usb_device *udev;
 268         struct udevice *hub;
 269         struct uclass *uc;
 270         int ret;
 271
 272         /* Device addresses start at 1 */
 273         devnum++;
 274         ret = uclass_get(UCLASS_USB_HUB, &uc);
 275         if (ret)
 276                 return NULL;
 277
 278         uclass_foreach_dev(hub, uc) {
 279                 struct udevice *dev;
 280
 281                 if (!device_active(hub))
 282                         continue;
 283                 udev = dev_get_parentdata(hub);
 284                 if (udev->devnum == devnum)
 285                         return udev;
 286
 287                 for (device_find_first_child(hub, &dev);
 288                      dev;
 289                      device_find_next_child(&dev)) {
 290                         if (!device_active(hub))
 291                                 continue;
 292
 293                         udev = dev_get_parentdata(dev);
 294                         if (udev->devnum == devnum)
 295                                 return udev;
 296                 }
 297         }
 298 #else
 299         struct usb_device *udev;
 300         int d;
 301
 302         for (d = 0; d < USB_MAX_DEVICE; d++) {
 303                 udev = usb_get_dev_index(d);
 304                 if (udev == NULL)
 305                         return NULL;
 306                 if (udev->devnum == devnum)
 307                         return udev;
 308         }
 309 #endif
 310
 311         return NULL;
 312 }
 313
 314 static inline char *portspeed(int speed)
 315 {
 316         char *speed_str;
 317
 318         switch (speed) {
 319         case USB_SPEED_SUPER:
 320                 speed_str = "5 Gb/s";
 321                 break;
 322         case USB_SPEED_HIGH:
 323                 speed_str = "480 Mb/s";
 324                 break;
 325         case USB_SPEED_LOW:
 326                 speed_str = "1.5 Mb/s";
 327                 break;
 328         default:
 329                 speed_str = "12 Mb/s";
 330                 break;
 331         }
 332
 333         return speed_str;
 334 }
 335
 336 /* shows the device tree recursively */
 337 static void usb_show_tree_graph(struct usb_device *dev, char *pre)
 338 {
 339         int index;
 340         int has_child, last_child;
 341
 342         index = strlen(pre);
 343         printf(" %s", pre);
 344 #ifdef CONFIG_DM_USB
 345         has_child = device_has_active_children(dev->dev);
 346 #else
 347         /* check if the device has connected children */
 348         int i;
 349
 350         has_child = 0;
 351         for (i = 0; i < dev->maxchild; i++) {
 352                 if (dev->children[i] != NULL)
 353                         has_child = 1;
 354         }
 355 #endif
 356         /* check if we are the last one */
 357 #ifdef CONFIG_DM_USB
 358         last_child = device_is_last_sibling(dev->dev);
 359 #else
 360         last_child = (dev->parent != NULL);
 361 #endif
 362         if (last_child) {
 363 #ifndef CONFIG_DM_USB
 364                 for (i = 0; i < dev->parent->maxchild; i++) {
 365                         /* search for children */
 366                         if (dev->parent->children[i] == dev) {
 367                                 /* found our pointer, see if we have a
 368                                  * little sister
 369                                  */
 370                                 while (i++ < dev->parent->maxchild) {
 371                                         if (dev->parent->children[i] != NULL) {
 372                                                 /* found a sister */
 373                                                 last_child = 0;
 374                                                 break;
 375                                         } /* if */
 376                                 } /* while */
 377                         } /* device found */
 378                 } /* for all children of the parent */
 379 #endif
 380                 printf("\b+-");
 381                 /* correct last child */
 382                 if (last_child && index)
 383                         pre[index-1] = ' ';
 384         } /* if not root hub */
 385         else
 386                 printf(" ");
 387         printf("%d ", dev->devnum);
 388         pre[index++] = ' ';
 389         pre[index++] = has_child ? '|' : ' ';
 390         pre[index] = 0;
 391         printf(" %s (%s, %dmA)\n", usb_get_class_desc(
 392                                         dev->config.if_desc[0].desc.bInterfaceClass),
 393                                         portspeed(dev->speed),
 394                                         dev->config.desc.bMaxPower * 2);
 395         if (strlen(dev->mf) || strlen(dev->prod) || strlen(dev->serial))
 396                 printf(" %s  %s %s %s\n", pre, dev->mf, dev->prod, dev->serial);
 397         printf(" %s\n", pre);
 398 #ifdef CONFIG_DM_USB
 399         struct udevice *child;
 400
 401         for (device_find_first_child(dev->dev, &child);
 402              child;
 403              device_find_next_child(&child)) {
 404                 struct usb_device *udev;
 405
 406                 if (!device_active(child))
 407                         continue;
 408
 409                 udev = dev_get_parentdata(child);
 410
 411                 /* Ignore emulators, we only want real devices */
 412                 if (device_get_uclass_id(child) != UCLASS_USB_EMUL) {
 413                         usb_show_tree_graph(udev, pre);
 414                         pre[index] = 0;
 415                 }
 416         }
 417 #else
 418         if (dev->maxchild > 0) {
 419                 for (i = 0; i < dev->maxchild; i++) {
 420                         if (dev->children[i] != NULL) {
 421                                 usb_show_tree_graph(dev->children[i], pre);
 422                                 pre[index] = 0;
 423                         }
 424                 }
 425         }
 426 #endif
 427 }
 428
 429 /* main routine for the tree command */
 430 static void usb_show_tree(struct usb_device *dev)
 431 {
 432         char preamble[32];
 433
 434         memset(preamble, '\0', sizeof(preamble));
 435         usb_show_tree_graph(dev, &preamble[0]);
 436 }
 437
 438 static int usb_test(struct usb_device *dev, int port, char* arg)
 439 {
 440         int mode;
 441
 442         if (port > dev->maxchild) {
 443                 printf("Device is no hub or does not have %d ports.\n", port);
 444                 return 1;
 445         }
 446
 447         switch (arg[0]) {
 448         case 'J':
 449         case 'j':
 450                 printf("Setting Test_J mode");
 451                 mode = USB_TEST_MODE_J;
 452                 break;
 453         case 'K':
 454         case 'k':
 455                 printf("Setting Test_K mode");
 456                 mode = USB_TEST_MODE_K;
 457                 break;
 458         case 'S':
 459         case 's':
 460                 printf("Setting Test_SE0_NAK mode");
 461                 mode = USB_TEST_MODE_SE0_NAK;
 462                 break;
 463         case 'P':
 464         case 'p':
 465                 printf("Setting Test_Packet mode");
 466                 mode = USB_TEST_MODE_PACKET;
 467                 break;
 468         case 'F':
 469         case 'f':
 470                 printf("Setting Test_Force_Enable mode");
 471                 mode = USB_TEST_MODE_FORCE_ENABLE;
 472                 break;
 473         default:
 474                 printf("Unrecognized test mode: %s\nAvailable modes: "
 475                        "J, K, S[E0_NAK], P[acket], F[orce_Enable]\n", arg);
 476                 return 1;
 477         }
 478
 479         if (port)
 480                 printf(" on downstream facing port %d...\n", port);
 481         else
 482                 printf(" on upstream facing port...\n");
 483
 484         if (usb_control_msg(dev, usb_sndctrlpipe(dev, 0), USB_REQ_SET_FEATURE,
 485                             port ? USB_RT_PORT : USB_RECIP_DEVICE,
 486                             port ? USB_PORT_FEAT_TEST : USB_FEAT_TEST,
 487                             (mode << 8) | port,
 488                             NULL, 0, USB_CNTL_TIMEOUT) == -1) {
 489                 printf("Error during SET_FEATURE.\n");
 490                 return 1;
 491         } else {
 492                 printf("Test mode successfully set. Use 'usb start' "
 493                        "to return to normal operation.\n");
 494                 return 0;
 495         }
 496 }
 497
 498
 499 /******************************************************************************
 500  * usb boot command intepreter. Derived from diskboot
 501  */
 502 #ifdef CONFIG_USB_STORAGE
 503 static int do_usbboot(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 504 {
 505         return common_diskboot(cmdtp, "usb", argc, argv);
 506 }
 507 #endif /* CONFIG_USB_STORAGE */
 508
 509 static int do_usb_stop_keyboard(int force)
 510 {
 511 #ifdef CONFIG_USB_KEYBOARD
 512         if (usb_kbd_deregister(force) != 0) {
 513                 printf("USB not stopped: usbkbd still using USB\n");
 514                 return 1;
 515         }
 516 #endif
 517         return 0;
 518 }
 519
 520 static void do_usb_start(void)
 521 {
 522         bootstage_mark_name(BOOTSTAGE_ID_USB_START, "usb_start");
 523
 524         if (usb_init() < 0)
 525                 return;
 526
 527         /* Driver model will probe the devices as they are found */
 528 #ifndef CONFIG_DM_USB
 529 #ifdef CONFIG_USB_STORAGE
 530         /* try to recognize storage devices immediately */
 531         usb_stor_curr_dev = usb_stor_scan(1);
 532 #endif
 533 #endif
 534 #ifdef CONFIG_USB_HOST_ETHER
 535         /* try to recognize ethernet devices immediately */
 536         usb_ether_curr_dev = usb_host_eth_scan(1);
 537 #endif
 538 #ifdef CONFIG_USB_KEYBOARD
 539         drv_usb_kbd_init();
 540 #endif
 541 }
 542
 543 #ifdef CONFIG_DM_USB
 544 static void show_info(struct udevice *dev)
 545 {
 546         struct udevice *child;
 547         struct usb_device *udev;
 548
 549         udev = dev_get_parentdata(dev);
 550         usb_display_desc(udev);
 551         usb_display_config(udev);
 552         for (device_find_first_child(dev, &child);
 553              child;
 554              device_find_next_child(&child)) {
 555                 if (device_active(child))
 556                         show_info(child);
 557         }
 558 }
 559
 560 static int usb_device_info(void)
 561 {
 562         struct udevice *bus;
 563
 564         for (uclass_first_device(UCLASS_USB, &bus);
 565              bus;
 566              uclass_next_device(&bus)) {
 567                 struct udevice *hub;
 568
 569                 device_find_first_child(bus, &hub);
 570                 if (device_get_uclass_id(hub) == UCLASS_USB_HUB &&
 571                     device_active(hub)) {
 572                         show_info(hub);
 573                 }
 574         }
 575
 576         return 0;
 577 }
 578 #endif
 579
 580 /******************************************************************************
 581  * usb command intepreter
 582  */
 583 static int do_usb(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 584 {
 585         struct usb_device *udev = NULL;
 586         int i;
 587         extern char usb_started;
 588 #ifdef CONFIG_USB_STORAGE
 589         block_dev_desc_t *stor_dev;
 590 #endif
 591
 592         if (argc < 2)
 593                 return CMD_RET_USAGE;
 594
 595         if (strncmp(argv[1], "start", 5) == 0) {
 596                 if (usb_started)
 597                         return 0; /* Already started */
 598                 printf("starting USB...\n");
 599                 do_usb_start();
 600                 return 0;
 601         }
 602
 603         if (strncmp(argv[1], "reset", 5) == 0) {
 604                 printf("resetting USB...\n");
 605                 if (do_usb_stop_keyboard(1) != 0)
 606                         return 1;
 607                 usb_stop();
 608                 do_usb_start();
 609                 return 0;
 610         }
 611         if (strncmp(argv[1], "stop", 4) == 0) {
 612                 if (argc != 2)
 613                         console_assign(stdin, "serial");
 614                 if (do_usb_stop_keyboard(0) != 0)
 615                         return 1;
 616                 printf("stopping USB..\n");
 617                 usb_stop();
 618                 return 0;
 619         }
 620         if (!usb_started) {
 621                 printf("USB is stopped. Please issue 'usb start' first.\n");
 622                 return 1;
 623         }
 624         if (strncmp(argv[1], "tree", 4) == 0) {
 625                 puts("USB device tree:\n");
 626 #ifdef CONFIG_DM_USB
 627                 struct udevice *bus;
 628
 629                 for (uclass_first_device(UCLASS_USB, &bus);
 630                      bus;
 631                      uclass_next_device(&bus)) {
 632                         struct usb_device *udev;
 633                         struct udevice *hub;
 634
 635                         device_find_first_child(bus, &hub);
 636                         if (device_get_uclass_id(hub) == UCLASS_USB_HUB &&
 637                             device_active(hub)) {
 638                                 udev = dev_get_parentdata(hub);
 639                                 usb_show_tree(udev);
 640                         }
 641                 }
 642 #else
 643                 for (i = 0; i < USB_MAX_DEVICE; i++) {
 644                         udev = usb_get_dev_index(i);
 645                         if (udev == NULL)
 646                                 break;
 647                         if (udev->parent == NULL)
 648                                 usb_show_tree(udev);
 649                 }
 650 #endif
 651                 return 0;
 652         }
 653         if (strncmp(argv[1], "inf", 3) == 0) {
 654                 if (argc == 2) {
 655 #ifdef CONFIG_DM_USB
 656                         usb_device_info();
 657 #else
 658                         int d;
 659                         for (d = 0; d < USB_MAX_DEVICE; d++) {
 660                                 udev = usb_get_dev_index(d);
 661                                 if (udev == NULL)
 662                                         break;
 663                                 usb_display_desc(udev);
 664                                 usb_display_config(udev);
 665                         }
 666 #endif
 667                         return 0;
 668                 } else {
 669                         /*
 670                          * With driver model this isn't right since we can
 671                          * have multiple controllers and the device numbering
 672                          * starts at 1 on each bus.
 673                          */
 674                         i = simple_strtoul(argv[2], NULL, 10);
 675                         printf("config for device %d\n", i);
 676                         udev = usb_find_device(i);
 677                         if (udev == NULL) {
 678                                 printf("*** No device available ***\n");
 679                                 return 0;
 680                         } else {
 681                                 usb_display_desc(udev);
 682                                 usb_display_config(udev);
 683                         }
 684                 }
 685                 return 0;
 686         }
 687         if (strncmp(argv[1], "test", 4) == 0) {
 688                 if (argc < 5)
 689                         return CMD_RET_USAGE;
 690                 i = simple_strtoul(argv[2], NULL, 10);
 691                 udev = usb_find_device(i);
 692                 if (udev == NULL) {
 693                         printf("Device %d does not exist.\n", i);
 694                         return 1;
 695                 }
 696                 i = simple_strtoul(argv[3], NULL, 10);
 697                 return usb_test(udev, i, argv[4]);
 698         }
 699 #ifdef CONFIG_USB_STORAGE
 700         if (strncmp(argv[1], "stor", 4) == 0)
 701                 return usb_stor_info();
 702
 703         if (strncmp(argv[1], "part", 4) == 0) {
 704                 int devno, ok = 0;
 705                 if (argc == 2) {
 706                         for (devno = 0; ; ++devno) {
 707                                 stor_dev = usb_stor_get_dev(devno);
 708                                 if (stor_dev == NULL)
 709                                         break;
 710                                 if (stor_dev->type != DEV_TYPE_UNKNOWN) {
 711                                         ok++;
 712                                         if (devno)
 713                                                 printf("\n");
 714                                         debug("print_part of %x\n", devno);
 715                                         print_part(stor_dev);
 716                                 }
 717                         }
 718                 } else {
 719                         devno = simple_strtoul(argv[2], NULL, 16);
 720                         stor_dev = usb_stor_get_dev(devno);
 721                         if (stor_dev != NULL &&
 722                             stor_dev->type != DEV_TYPE_UNKNOWN) {
 723                                 ok++;
 724                                 debug("print_part of %x\n", devno);
 725                                 print_part(stor_dev);
 726                         }
 727                 }
 728                 if (!ok) {
 729                         printf("\nno USB devices available\n");
 730                         return 1;
 731                 }
 732                 return 0;
 733         }
 734         if (strcmp(argv[1], "read") == 0) {
 735                 if (usb_stor_curr_dev < 0) {
 736                         printf("no current device selected\n");
 737                         return 1;
 738                 }
 739                 if (argc == 5) {
 740                         unsigned long addr = simple_strtoul(argv[2], NULL, 16);
 741                         unsigned long blk  = simple_strtoul(argv[3], NULL, 16);
 742                         unsigned long cnt  = simple_strtoul(argv[4], NULL, 16);
 743                         unsigned long n;
 744                         printf("\nUSB read: device %d block # %ld, count %ld"
 745                                 " ... ", usb_stor_curr_dev, blk, cnt);
 746                         stor_dev = usb_stor_get_dev(usb_stor_curr_dev);
 747                         n = stor_dev->block_read(usb_stor_curr_dev, blk, cnt,
 748                                                  (ulong *)addr);
 749                         printf("%ld blocks read: %s\n", n,
 750                                 (n == cnt) ? "OK" : "ERROR");
 751                         if (n == cnt)
 752                                 return 0;
 753                         return 1;
 754                 }
 755         }
 756         if (strcmp(argv[1], "write") == 0) {
 757                 if (usb_stor_curr_dev < 0) {
 758                         printf("no current device selected\n");
 759                         return 1;
 760                 }
 761                 if (argc == 5) {
 762                         unsigned long addr = simple_strtoul(argv[2], NULL, 16);
 763                         unsigned long blk  = simple_strtoul(argv[3], NULL, 16);
 764                         unsigned long cnt  = simple_strtoul(argv[4], NULL, 16);
 765                         unsigned long n;
 766                         printf("\nUSB write: device %d block # %ld, count %ld"
 767                                 " ... ", usb_stor_curr_dev, blk, cnt);
 768                         stor_dev = usb_stor_get_dev(usb_stor_curr_dev);
 769                         n = stor_dev->block_write(usb_stor_curr_dev, blk, cnt,
 770                                                 (ulong *)addr);
 771                         printf("%ld blocks write: %s\n", n,
 772                                 (n == cnt) ? "OK" : "ERROR");
 773                         if (n == cnt)
 774                                 return 0;
 775                         return 1;
 776                 }
 777         }
 778         if (strncmp(argv[1], "dev", 3) == 0) {
 779                 if (argc == 3) {
 780                         int dev = (int)simple_strtoul(argv[2], NULL, 10);
 781                         printf("\nUSB device %d: ", dev);
 782                         stor_dev = usb_stor_get_dev(dev);
 783                         if (stor_dev == NULL) {
 784                                 printf("unknown device\n");
 785                                 return 1;
 786                         }
 787                         printf("\n    Device %d: ", dev);
 788                         dev_print(stor_dev);
 789                         if (stor_dev->type == DEV_TYPE_UNKNOWN)
 790                                 return 1;
 791                         usb_stor_curr_dev = dev;
 792                         printf("... is now current device\n");
 793                         return 0;
 794                 } else {
 795                         printf("\nUSB device %d: ", usb_stor_curr_dev);
 796                         stor_dev = usb_stor_get_dev(usb_stor_curr_dev);
 797                         dev_print(stor_dev);
 798                         if (stor_dev->type == DEV_TYPE_UNKNOWN)
 799                                 return 1;
 800                         return 0;
 801                 }
 802                 return 0;
 803         }
 804 #endif /* CONFIG_USB_STORAGE */
 805         return CMD_RET_USAGE;
 806 }
 807
 808 U_BOOT_CMD(
 809         usb,    5,      1,      do_usb,
 810         "USB sub-system",
 811         "start - start (scan) USB controller\n"
 812         "usb reset - reset (rescan) USB controller\n"
 813         "usb stop [f] - stop USB [f]=force stop\n"
 814         "usb tree - show USB device tree\n"
 815         "usb info [dev] - show available USB devices\n"
 816         "usb test [dev] [port] [mode] - set USB 2.0 test mode\n"
 817         "    (specify port 0 to indicate the device's upstream port)\n"
 818         "    Available modes: J, K, S[E0_NAK], P[acket], F[orce_Enable]\n"
 819 #ifdef CONFIG_USB_STORAGE
 820         "usb storage - show details of USB storage devices\n"
 821         "usb dev [dev] - show or set current USB storage device\n"
 822         "usb part [dev] - print partition table of one or all USB storage"
 823         "    devices\n"
 824         "usb read addr blk# cnt - read `cnt' blocks starting at block `blk#'\n"
 825         "    to memory address `addr'\n"
 826         "usb write addr blk# cnt - write `cnt' blocks starting at block `blk#'\n"
 827         "    from memory address `addr'"
 828 #endif /* CONFIG_USB_STORAGE */
 829 );
 830
 831
 832 #ifdef CONFIG_USB_STORAGE
 833 U_BOOT_CMD(
 834         usbboot,        3,      1,      do_usbboot,
 835         "boot from USB device",
 836         "loadAddr dev:part"
 837 );
 838 #endif /* CONFIG_USB_STORAGE */