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 <console.h>
  17 #include <dm.h>
  18 #include <dm/uclass-internal.h>
  19 #include <memalign.h>
  20 #include <asm/byteorder.h>
  21 #include <asm/unaligned.h>
  22 #include <part.h>
  23 #include <usb.h>
  24
  25 #ifdef CONFIG_USB_STORAGE
  26 static int usb_stor_curr_dev = -1; /* current device */
  27 #endif
  28 #if defined(CONFIG_USB_HOST_ETHER) && !defined(CONFIG_DM_ETH)
  29 static int __maybe_unused usb_ether_curr_dev = -1; /* current ethernet device */
  30 #endif
  31
  32 /* some display routines (info command) */
  33 static char *usb_get_class_desc(unsigned char dclass)
  34 {
  35         switch (dclass) {
  36         case USB_CLASS_PER_INTERFACE:
  37                 return "See Interface";
  38         case USB_CLASS_AUDIO:
  39                 return "Audio";
  40         case USB_CLASS_COMM:
  41                 return "Communication";
  42         case USB_CLASS_HID:
  43                 return "Human Interface";
  44         case USB_CLASS_PRINTER:
  45                 return "Printer";
  46         case USB_CLASS_MASS_STORAGE:
  47                 return "Mass Storage";
  48         case USB_CLASS_HUB:
  49                 return "Hub";
  50         case USB_CLASS_DATA:
  51                 return "CDC Data";
  52         case USB_CLASS_VENDOR_SPEC:
  53                 return "Vendor specific";
  54         default:
  55                 return "";
  56         }
  57 }
  58
  59 static void usb_display_class_sub(unsigned char dclass, unsigned char subclass,
  60                                   unsigned char proto)
  61 {
  62         switch (dclass) {
  63         case USB_CLASS_PER_INTERFACE:
  64                 printf("See Interface");
  65                 break;
  66         case USB_CLASS_HID:
  67                 printf("Human Interface, Subclass: ");
  68                 switch (subclass) {
  69                 case USB_SUB_HID_NONE:
  70                         printf("None");
  71                         break;
  72                 case USB_SUB_HID_BOOT:
  73                         printf("Boot ");
  74                         switch (proto) {
  75                         case USB_PROT_HID_NONE:
  76                                 printf("None");
  77                                 break;
  78                         case USB_PROT_HID_KEYBOARD:
  79                                 printf("Keyboard");
  80                                 break;
  81                         case USB_PROT_HID_MOUSE:
  82                                 printf("Mouse");
  83                                 break;
  84                         default:
  85                                 printf("reserved");
  86                                 break;
  87                         }
  88                         break;
  89                 default:
  90                         printf("reserved");
  91                         break;
  92                 }
  93                 break;
  94         case USB_CLASS_MASS_STORAGE:
  95                 printf("Mass Storage, ");
  96                 switch (subclass) {
  97                 case US_SC_RBC:
  98                         printf("RBC ");
  99                         break;
 100                 case US_SC_8020:
 101                         printf("SFF-8020i (ATAPI)");
 102                         break;
 103                 case US_SC_QIC:
 104                         printf("QIC-157 (Tape)");
 105                         break;
 106                 case US_SC_UFI:
 107                         printf("UFI");
 108                         break;
 109                 case US_SC_8070:
 110                         printf("SFF-8070");
 111                         break;
 112                 case US_SC_SCSI:
 113                         printf("Transp. SCSI");
 114                         break;
 115                 default:
 116                         printf("reserved");
 117                         break;
 118                 }
 119                 printf(", ");
 120                 switch (proto) {
 121                 case US_PR_CB:
 122                         printf("Command/Bulk");
 123                         break;
 124                 case US_PR_CBI:
 125                         printf("Command/Bulk/Int");
 126                         break;
 127                 case US_PR_BULK:
 128                         printf("Bulk only");
 129                         break;
 130                 default:
 131                         printf("reserved");
 132                         break;
 133                 }
 134                 break;
 135         default:
 136                 printf("%s", usb_get_class_desc(dclass));
 137                 break;
 138         }
 139 }
 140
 141 static void usb_display_string(struct usb_device *dev, int index)
 142 {
 143         ALLOC_CACHE_ALIGN_BUFFER(char, buffer, 256);
 144
 145         if (index != 0) {
 146                 if (usb_string(dev, index, &buffer[0], 256) > 0)
 147                         printf("String: \"%s\"", buffer);
 148         }
 149 }
 150
 151 static void usb_display_desc(struct usb_device *dev)
 152 {
 153         uint packet_size = dev->descriptor.bMaxPacketSize0;
 154
 155         if (dev->descriptor.bDescriptorType == USB_DT_DEVICE) {
 156                 printf("%d: %s,  USB Revision %x.%x\n", dev->devnum,
 157                 usb_get_class_desc(dev->config.if_desc[0].desc.bInterfaceClass),
 158                                    (dev->descriptor.bcdUSB>>8) & 0xff,
 159                                    dev->descriptor.bcdUSB & 0xff);
 160
 161                 if (strlen(dev->mf) || strlen(dev->prod) ||
 162                     strlen(dev->serial))
 163                         printf(" - %s %s %s\n", dev->mf, dev->prod,
 164                                 dev->serial);
 165                 if (dev->descriptor.bDeviceClass) {
 166                         printf(" - Class: ");
 167                         usb_display_class_sub(dev->descriptor.bDeviceClass,
 168                                               dev->descriptor.bDeviceSubClass,
 169                                               dev->descriptor.bDeviceProtocol);
 170                         printf("\n");
 171                 } else {
 172                         printf(" - Class: (from Interface) %s\n",
 173                                usb_get_class_desc(
 174                                 dev->config.if_desc[0].desc.bInterfaceClass));
 175                 }
 176                 if (dev->descriptor.bcdUSB >= cpu_to_le16(0x0300))
 177                         packet_size = 1 << packet_size;
 178                 printf(" - PacketSize: %d  Configurations: %d\n",
 179                         packet_size, dev->descriptor.bNumConfigurations);
 180                 printf(" - Vendor: 0x%04x  Product 0x%04x Version %d.%d\n",
 181                         dev->descriptor.idVendor, dev->descriptor.idProduct,
 182                         (dev->descriptor.bcdDevice>>8) & 0xff,
 183                         dev->descriptor.bcdDevice & 0xff);
 184         }
 185
 186 }
 187
 188 static void usb_display_conf_desc(struct usb_config_descriptor *config,
 189                                   struct usb_device *dev)
 190 {
 191         printf("   Configuration: %d\n", config->bConfigurationValue);
 192         printf("   - Interfaces: %d %s%s%dmA\n", config->bNumInterfaces,
 193                (config->bmAttributes & 0x40) ? "Self Powered " : "Bus Powered ",
 194                (config->bmAttributes & 0x20) ? "Remote Wakeup " : "",
 195                 config->bMaxPower*2);
 196         if (config->iConfiguration) {
 197                 printf("   - ");
 198                 usb_display_string(dev, config->iConfiguration);
 199                 printf("\n");
 200         }
 201 }
 202
 203 static void usb_display_if_desc(struct usb_interface_descriptor *ifdesc,
 204                                 struct usb_device *dev)
 205 {
 206         printf("     Interface: %d\n", ifdesc->bInterfaceNumber);
 207         printf("     - Alternate Setting %d, Endpoints: %d\n",
 208                 ifdesc->bAlternateSetting, ifdesc->bNumEndpoints);
 209         printf("     - Class ");
 210         usb_display_class_sub(ifdesc->bInterfaceClass,
 211                 ifdesc->bInterfaceSubClass, ifdesc->bInterfaceProtocol);
 212         printf("\n");
 213         if (ifdesc->iInterface) {
 214                 printf("     - ");
 215                 usb_display_string(dev, ifdesc->iInterface);
 216                 printf("\n");
 217         }
 218 }
 219
 220 static void usb_display_ep_desc(struct usb_endpoint_descriptor *epdesc)
 221 {
 222         printf("     - Endpoint %d %s ", epdesc->bEndpointAddress & 0xf,
 223                 (epdesc->bEndpointAddress & 0x80) ? "In" : "Out");
 224         switch ((epdesc->bmAttributes & 0x03)) {
 225         case 0:
 226                 printf("Control");
 227                 break;
 228         case 1:
 229                 printf("Isochronous");
 230                 break;
 231         case 2:
 232                 printf("Bulk");
 233                 break;
 234         case 3:
 235                 printf("Interrupt");
 236                 break;
 237         }
 238         printf(" MaxPacket %d", get_unaligned(&epdesc->wMaxPacketSize));
 239         if ((epdesc->bmAttributes & 0x03) == 0x3)
 240                 printf(" Interval %dms", epdesc->bInterval);
 241         printf("\n");
 242 }
 243
 244 /* main routine to diasplay the configs, interfaces and endpoints */
 245 static void usb_display_config(struct usb_device *dev)
 246 {
 247         struct usb_config *config;
 248         struct usb_interface *ifdesc;
 249         struct usb_endpoint_descriptor *epdesc;
 250         int i, ii;
 251
 252         config = &dev->config;
 253         usb_display_conf_desc(&config->desc, dev);
 254         for (i = 0; i < config->no_of_if; i++) {
 255                 ifdesc = &config->if_desc[i];
 256                 usb_display_if_desc(&ifdesc->desc, dev);
 257                 for (ii = 0; ii < ifdesc->no_of_ep; ii++) {
 258                         epdesc = &ifdesc->ep_desc[ii];
 259                         usb_display_ep_desc(epdesc);
 260                 }
 261         }
 262         printf("\n");
 263 }
 264
 265 /*
 266  * With driver model this isn't right since we can have multiple controllers
 267  * and the device numbering starts at 1 on each bus.
 268  * TODO(sjg@chromium.org): Add a way to specify the controller/bus.
 269  */
 270 static struct usb_device *usb_find_device(int devnum)
 271 {
 272 #ifdef CONFIG_DM_USB
 273         struct usb_device *udev;
 274         struct udevice *hub;
 275         struct uclass *uc;
 276         int ret;
 277
 278         /* Device addresses start at 1 */
 279         devnum++;
 280         ret = uclass_get(UCLASS_USB_HUB, &uc);
 281         if (ret)
 282                 return NULL;
 283
 284         uclass_foreach_dev(hub, uc) {
 285                 struct udevice *dev;
 286
 287                 if (!device_active(hub))
 288                         continue;
 289                 udev = dev_get_parent_priv(hub);
 290                 if (udev->devnum == devnum)
 291                         return udev;
 292
 293                 for (device_find_first_child(hub, &dev);
 294                      dev;
 295                      device_find_next_child(&dev)) {
 296                         if (!device_active(hub))
 297                                 continue;
 298
 299                         udev = dev_get_parent_priv(dev);
 300                         if (udev->devnum == devnum)
 301                                 return udev;
 302                 }
 303         }
 304 #else
 305         struct usb_device *udev;
 306         int d;
 307
 308         for (d = 0; d < USB_MAX_DEVICE; d++) {
 309                 udev = usb_get_dev_index(d);
 310                 if (udev == NULL)
 311                         return NULL;
 312                 if (udev->devnum == devnum)
 313                         return udev;
 314         }
 315 #endif
 316
 317         return NULL;
 318 }
 319
 320 static inline char *portspeed(int speed)
 321 {
 322         char *speed_str;
 323
 324         switch (speed) {
 325         case USB_SPEED_SUPER:
 326                 speed_str = "5 Gb/s";
 327                 break;
 328         case USB_SPEED_HIGH:
 329                 speed_str = "480 Mb/s";
 330                 break;
 331         case USB_SPEED_LOW:
 332                 speed_str = "1.5 Mb/s";
 333                 break;
 334         default:
 335                 speed_str = "12 Mb/s";
 336                 break;
 337         }
 338
 339         return speed_str;
 340 }
 341
 342 /* shows the device tree recursively */
 343 static void usb_show_tree_graph(struct usb_device *dev, char *pre)
 344 {
 345         int index;
 346         int has_child, last_child;
 347
 348         index = strlen(pre);
 349         printf(" %s", pre);
 350 #ifdef CONFIG_DM_USB
 351         has_child = device_has_active_children(dev->dev);
 352         if (device_get_uclass_id(dev->dev) == UCLASS_MASS_STORAGE) {
 353                 struct udevice *child;
 354
 355                 for (device_find_first_child(dev->dev, &child);
 356                      child;
 357                      device_find_next_child(&child)) {
 358                         if (device_get_uclass_id(child) == UCLASS_BLK)
 359                                 has_child = 0;
 360                 }
 361         }
 362 #else
 363         /* check if the device has connected children */
 364         int i;
 365
 366         has_child = 0;
 367         for (i = 0; i < dev->maxchild; i++) {
 368                 if (dev->children[i] != NULL)
 369                         has_child = 1;
 370         }
 371 #endif
 372         /* check if we are the last one */
 373 #ifdef CONFIG_DM_USB
 374         /* Not the root of the usb tree? */
 375         if (device_get_uclass_id(dev->dev->parent) != UCLASS_USB) {
 376                 last_child = device_is_last_sibling(dev->dev);
 377 #else
 378         if (dev->parent != NULL) { /* not root? */
 379                 last_child = 1;
 380                 for (i = 0; i < dev->parent->maxchild; i++) {
 381                         /* search for children */
 382                         if (dev->parent->children[i] == dev) {
 383                                 /* found our pointer, see if we have a
 384                                  * little sister
 385                                  */
 386                                 while (i++ < dev->parent->maxchild) {
 387                                         if (dev->parent->children[i] != NULL) {
 388                                                 /* found a sister */
 389                                                 last_child = 0;
 390                                                 break;
 391                                         } /* if */
 392                                 } /* while */
 393                         } /* device found */
 394                 } /* for all children of the parent */
 395 #endif
 396                 printf("\b+-");
 397                 /* correct last child */
 398                 if (last_child && index)
 399                         pre[index-1] = ' ';
 400         } /* if not root hub */
 401         else
 402                 printf(" ");
 403         printf("%d ", dev->devnum);
 404         pre[index++] = ' ';
 405         pre[index++] = has_child ? '|' : ' ';
 406         pre[index] = 0;
 407         printf(" %s (%s, %dmA)\n", usb_get_class_desc(
 408                                         dev->config.if_desc[0].desc.bInterfaceClass),
 409                                         portspeed(dev->speed),
 410                                         dev->config.desc.bMaxPower * 2);
 411         if (strlen(dev->mf) || strlen(dev->prod) || strlen(dev->serial))
 412                 printf(" %s  %s %s %s\n", pre, dev->mf, dev->prod, dev->serial);
 413         printf(" %s\n", pre);
 414 #ifdef CONFIG_DM_USB
 415         struct udevice *child;
 416
 417         for (device_find_first_child(dev->dev, &child);
 418              child;
 419              device_find_next_child(&child)) {
 420                 struct usb_device *udev;
 421
 422                 if (!device_active(child))
 423                         continue;
 424
 425                 udev = dev_get_parent_priv(child);
 426
 427                 /*
 428                  * Ignore emulators and block child devices, we only want
 429                  * real devices
 430                  */
 431                 if ((device_get_uclass_id(child) != UCLASS_USB_EMUL) &&
 432                     (device_get_uclass_id(child) != UCLASS_BLK)) {
 433                         usb_show_tree_graph(udev, pre);
 434                         pre[index] = 0;
 435                 }
 436         }
 437 #else
 438         if (dev->maxchild > 0) {
 439                 for (i = 0; i < dev->maxchild; i++) {
 440                         if (dev->children[i] != NULL) {
 441                                 usb_show_tree_graph(dev->children[i], pre);
 442                                 pre[index] = 0;
 443                         }
 444                 }
 445         }
 446 #endif
 447 }
 448
 449 /* main routine for the tree command */
 450 static void usb_show_subtree(struct usb_device *dev)
 451 {
 452         char preamble[32];
 453
 454         memset(preamble, '\0', sizeof(preamble));
 455         usb_show_tree_graph(dev, &preamble[0]);
 456 }
 457
 458 #ifdef CONFIG_DM_USB
 459 typedef void (*usb_dev_func_t)(struct usb_device *udev);
 460
 461 static void usb_for_each_root_dev(usb_dev_func_t func)
 462 {
 463         struct udevice *bus;
 464
 465         for (uclass_find_first_device(UCLASS_USB, &bus);
 466                 bus;
 467                 uclass_find_next_device(&bus)) {
 468                 struct usb_device *udev;
 469                 struct udevice *dev;
 470
 471                 if (!device_active(bus))
 472                         continue;
 473
 474                 device_find_first_child(bus, &dev);
 475                 if (dev && device_active(dev)) {
 476                         udev = dev_get_parent_priv(dev);
 477                         func(udev);
 478                 }
 479         }
 480 }
 481 #endif
 482
 483 void usb_show_tree(void)
 484 {
 485 #ifdef CONFIG_DM_USB
 486         usb_for_each_root_dev(usb_show_subtree);
 487 #else
 488         struct usb_device *udev;
 489         int i;
 490
 491         for (i = 0; i < USB_MAX_DEVICE; i++) {
 492                 udev = usb_get_dev_index(i);
 493                 if (udev == NULL)
 494                         break;
 495                 if (udev->parent == NULL)
 496                         usb_show_subtree(udev);
 497         }
 498 #endif
 499 }
 500
 501 static int usb_test(struct usb_device *dev, int port, char* arg)
 502 {
 503         int mode;
 504
 505         if (port > dev->maxchild) {
 506                 printf("Device is no hub or does not have %d ports.\n", port);
 507                 return 1;
 508         }
 509
 510         switch (arg[0]) {
 511         case 'J':
 512         case 'j':
 513                 printf("Setting Test_J mode");
 514                 mode = USB_TEST_MODE_J;
 515                 break;
 516         case 'K':
 517         case 'k':
 518                 printf("Setting Test_K mode");
 519                 mode = USB_TEST_MODE_K;
 520                 break;
 521         case 'S':
 522         case 's':
 523                 printf("Setting Test_SE0_NAK mode");
 524                 mode = USB_TEST_MODE_SE0_NAK;
 525                 break;
 526         case 'P':
 527         case 'p':
 528                 printf("Setting Test_Packet mode");
 529                 mode = USB_TEST_MODE_PACKET;
 530                 break;
 531         case 'F':
 532         case 'f':
 533                 printf("Setting Test_Force_Enable mode");
 534                 mode = USB_TEST_MODE_FORCE_ENABLE;
 535                 break;
 536         default:
 537                 printf("Unrecognized test mode: %s\nAvailable modes: "
 538                        "J, K, S[E0_NAK], P[acket], F[orce_Enable]\n", arg);
 539                 return 1;
 540         }
 541
 542         if (port)
 543                 printf(" on downstream facing port %d...\n", port);
 544         else
 545                 printf(" on upstream facing port...\n");
 546
 547         if (usb_control_msg(dev, usb_sndctrlpipe(dev, 0), USB_REQ_SET_FEATURE,
 548                             port ? USB_RT_PORT : USB_RECIP_DEVICE,
 549                             port ? USB_PORT_FEAT_TEST : USB_FEAT_TEST,
 550                             (mode << 8) | port,
 551                             NULL, 0, USB_CNTL_TIMEOUT) == -1) {
 552                 printf("Error during SET_FEATURE.\n");
 553                 return 1;
 554         } else {
 555                 printf("Test mode successfully set. Use 'usb start' "
 556                        "to return to normal operation.\n");
 557                 return 0;
 558         }
 559 }
 560
 561
 562 /******************************************************************************
 563  * usb boot command intepreter. Derived from diskboot
 564  */
 565 #ifdef CONFIG_USB_STORAGE
 566 static int do_usbboot(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 567 {
 568         return common_diskboot(cmdtp, "usb", argc, argv);
 569 }
 570 #endif /* CONFIG_USB_STORAGE */
 571
 572 static int do_usb_stop_keyboard(int force)
 573 {
 574 #if !defined CONFIG_DM_USB && defined CONFIG_USB_KEYBOARD
 575         if (usb_kbd_deregister(force) != 0) {
 576                 printf("USB not stopped: usbkbd still using USB\n");
 577                 return 1;
 578         }
 579 #endif
 580         return 0;
 581 }
 582
 583 static void do_usb_start(void)
 584 {
 585         bootstage_mark_name(BOOTSTAGE_ID_USB_START, "usb_start");
 586
 587         if (usb_init() < 0)
 588                 return;
 589
 590         /* Driver model will probe the devices as they are found */
 591 # ifdef CONFIG_USB_STORAGE
 592         /* try to recognize storage devices immediately */
 593         usb_stor_curr_dev = usb_stor_scan(1);
 594 # endif
 595 #ifndef CONFIG_DM_USB
 596 # ifdef CONFIG_USB_KEYBOARD
 597         drv_usb_kbd_init();
 598 # endif
 599 #endif /* !CONFIG_DM_USB */
 600 #ifdef CONFIG_USB_HOST_ETHER
 601 # ifdef CONFIG_DM_ETH
 602 #  ifndef CONFIG_DM_USB
 603 #   error "You must use CONFIG_DM_USB if you want to use CONFIG_USB_HOST_ETHER with CONFIG_DM_ETH"
 604 #  endif
 605 # else
 606         /* try to recognize ethernet devices immediately */
 607         usb_ether_curr_dev = usb_host_eth_scan(1);
 608 # endif
 609 #endif
 610 }
 611
 612 #ifdef CONFIG_DM_USB
 613 static void usb_show_info(struct usb_device *udev)
 614 {
 615         struct udevice *child;
 616
 617         usb_display_desc(udev);
 618         usb_display_config(udev);
 619         for (device_find_first_child(udev->dev, &child);
 620              child;
 621              device_find_next_child(&child)) {
 622                 if (device_active(child) &&
 623                     (device_get_uclass_id(child) != UCLASS_USB_EMUL) &&
 624                     (device_get_uclass_id(child) != UCLASS_BLK)) {
 625                         udev = dev_get_parent_priv(child);
 626                         usb_show_info(udev);
 627                 }
 628         }
 629 }
 630 #endif
 631
 632 /******************************************************************************
 633  * usb command intepreter
 634  */
 635 static int do_usb(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 636 {
 637         struct usb_device *udev = NULL;
 638         int i;
 639         extern char usb_started;
 640
 641         if (argc < 2)
 642                 return CMD_RET_USAGE;
 643
 644         if (strncmp(argv[1], "start", 5) == 0) {
 645                 if (usb_started)
 646                         return 0; /* Already started */
 647                 printf("starting USB...\n");
 648                 do_usb_start();
 649                 return 0;
 650         }
 651
 652         if (strncmp(argv[1], "reset", 5) == 0) {
 653                 printf("resetting USB...\n");
 654                 if (do_usb_stop_keyboard(1) != 0)
 655                         return 1;
 656                 usb_stop();
 657                 do_usb_start();
 658                 return 0;
 659         }
 660         if (strncmp(argv[1], "stop", 4) == 0) {
 661                 if (argc != 2)
 662                         console_assign(stdin, "serial");
 663                 if (do_usb_stop_keyboard(0) != 0)
 664                         return 1;
 665                 printf("stopping USB..\n");
 666                 usb_stop();
 667                 return 0;
 668         }
 669         if (!usb_started) {
 670                 printf("USB is stopped. Please issue 'usb start' first.\n");
 671                 return 1;
 672         }
 673         if (strncmp(argv[1], "tree", 4) == 0) {
 674                 puts("USB device tree:\n");
 675                 usb_show_tree();
 676                 return 0;
 677         }
 678         if (strncmp(argv[1], "inf", 3) == 0) {
 679                 if (argc == 2) {
 680 #ifdef CONFIG_DM_USB
 681                         usb_for_each_root_dev(usb_show_info);
 682 #else
 683                         int d;
 684                         for (d = 0; d < USB_MAX_DEVICE; d++) {
 685                                 udev = usb_get_dev_index(d);
 686                                 if (udev == NULL)
 687                                         break;
 688                                 usb_display_desc(udev);
 689                                 usb_display_config(udev);
 690                         }
 691 #endif
 692                         return 0;
 693                 } else {
 694                         /*
 695                          * With driver model this isn't right since we can
 696                          * have multiple controllers and the device numbering
 697                          * starts at 1 on each bus.
 698                          */
 699                         i = simple_strtoul(argv[2], NULL, 10);
 700                         printf("config for device %d\n", i);
 701                         udev = usb_find_device(i);
 702                         if (udev == NULL) {
 703                                 printf("*** No device available ***\n");
 704                                 return 0;
 705                         } else {
 706                                 usb_display_desc(udev);
 707                                 usb_display_config(udev);
 708                         }
 709                 }
 710                 return 0;
 711         }
 712         if (strncmp(argv[1], "test", 4) == 0) {
 713                 if (argc < 5)
 714                         return CMD_RET_USAGE;
 715                 i = simple_strtoul(argv[2], NULL, 10);
 716                 udev = usb_find_device(i);
 717                 if (udev == NULL) {
 718                         printf("Device %d does not exist.\n", i);
 719                         return 1;
 720                 }
 721                 i = simple_strtoul(argv[3], NULL, 10);
 722                 return usb_test(udev, i, argv[4]);
 723         }
 724 #ifdef CONFIG_USB_STORAGE
 725         if (strncmp(argv[1], "stor", 4) == 0)
 726                 return usb_stor_info();
 727
 728         return blk_common_cmd(argc, argv, IF_TYPE_USB, &usb_stor_curr_dev);
 729 #else
 730         return CMD_RET_USAGE;
 731 #endif /* CONFIG_USB_STORAGE */
 732 }
 733
 734 U_BOOT_CMD(
 735         usb,    5,      1,      do_usb,
 736         "USB sub-system",
 737         "start - start (scan) USB controller\n"
 738         "usb reset - reset (rescan) USB controller\n"
 739         "usb stop [f] - stop USB [f]=force stop\n"
 740         "usb tree - show USB device tree\n"
 741         "usb info [dev] - show available USB devices\n"
 742         "usb test [dev] [port] [mode] - set USB 2.0 test mode\n"
 743         "    (specify port 0 to indicate the device's upstream port)\n"
 744         "    Available modes: J, K, S[E0_NAK], P[acket], F[orce_Enable]\n"
 745 #ifdef CONFIG_USB_STORAGE
 746         "usb storage - show details of USB storage devices\n"
 747         "usb dev [dev] - show or set current USB storage device\n"
 748         "usb part [dev] - print partition table of one or all USB storage"
 749         "    devices\n"
 750         "usb read addr blk# cnt - read `cnt' blocks starting at block `blk#'\n"
 751         "    to memory address `addr'\n"
 752         "usb write addr blk# cnt - write `cnt' blocks starting at block `blk#'\n"
 753         "    from memory address `addr'"
 754 #endif /* CONFIG_USB_STORAGE */
 755 );
 756
 757
 758 #ifdef CONFIG_USB_STORAGE
 759 U_BOOT_CMD(
 760         usbboot,        3,      1,      do_usbboot,
 761         "boot from USB device",
 762         "loadAddr dev:part"
 763 );
 764 #endif /* CONFIG_USB_STORAGE */