git.sur5r.net Git - u-boot/blob - cmd/usb.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * (C) Copyright 2001
   4  * Denis Peter, MPL AG Switzerland
   5  *
   6  * Adapted for U-Boot driver model
   7  * (C) Copyright 2015 Google, Inc
   8  *
   9  * Most of this source has been derived from the Linux USB
  10  * project.
  11  */
  12
  13 #include <common.h>
  14 #include <command.h>
  15 #include <console.h>
  16 #include <dm.h>
  17 #include <dm/uclass-internal.h>
  18 #include <memalign.h>
  19 #include <asm/byteorder.h>
  20 #include <asm/unaligned.h>
  21 #include <part.h>
  22 #include <usb.h>
  23
  24 #ifdef CONFIG_USB_STORAGE
  25 static int usb_stor_curr_dev = -1; /* current device */
  26 #endif
  27 #if defined(CONFIG_USB_HOST_ETHER) && !defined(CONFIG_DM_ETH)
  28 static int __maybe_unused usb_ether_curr_dev = -1; /* current ethernet device */
  29 #endif
  30
  31 /* some display routines (info command) */
  32 static char *usb_get_class_desc(unsigned char dclass)
  33 {
  34         switch (dclass) {
  35         case USB_CLASS_PER_INTERFACE:
  36                 return "See Interface";
  37         case USB_CLASS_AUDIO:
  38                 return "Audio";
  39         case USB_CLASS_COMM:
  40                 return "Communication";
  41         case USB_CLASS_HID:
  42                 return "Human Interface";
  43         case USB_CLASS_PRINTER:
  44                 return "Printer";
  45         case USB_CLASS_MASS_STORAGE:
  46                 return "Mass Storage";
  47         case USB_CLASS_HUB:
  48                 return "Hub";
  49         case USB_CLASS_DATA:
  50                 return "CDC Data";
  51         case USB_CLASS_VENDOR_SPEC:
  52                 return "Vendor specific";
  53         default:
  54                 return "";
  55         }
  56 }
  57
  58 static void usb_display_class_sub(unsigned char dclass, unsigned char subclass,
  59                                   unsigned char proto)
  60 {
  61         switch (dclass) {
  62         case USB_CLASS_PER_INTERFACE:
  63                 printf("See Interface");
  64                 break;
  65         case USB_CLASS_HID:
  66                 printf("Human Interface, Subclass: ");
  67                 switch (subclass) {
  68                 case USB_SUB_HID_NONE:
  69                         printf("None");
  70                         break;
  71                 case USB_SUB_HID_BOOT:
  72                         printf("Boot ");
  73                         switch (proto) {
  74                         case USB_PROT_HID_NONE:
  75                                 printf("None");
  76                                 break;
  77                         case USB_PROT_HID_KEYBOARD:
  78                                 printf("Keyboard");
  79                                 break;
  80                         case USB_PROT_HID_MOUSE:
  81                                 printf("Mouse");
  82                                 break;
  83                         default:
  84                                 printf("reserved");
  85                                 break;
  86                         }
  87                         break;
  88                 default:
  89                         printf("reserved");
  90                         break;
  91                 }
  92                 break;
  93         case USB_CLASS_MASS_STORAGE:
  94                 printf("Mass Storage, ");
  95                 switch (subclass) {
  96                 case US_SC_RBC:
  97                         printf("RBC ");
  98                         break;
  99                 case US_SC_8020:
 100                         printf("SFF-8020i (ATAPI)");
 101                         break;
 102                 case US_SC_QIC:
 103                         printf("QIC-157 (Tape)");
 104                         break;
 105                 case US_SC_UFI:
 106                         printf("UFI");
 107                         break;
 108                 case US_SC_8070:
 109                         printf("SFF-8070");
 110                         break;
 111                 case US_SC_SCSI:
 112                         printf("Transp. SCSI");
 113                         break;
 114                 default:
 115                         printf("reserved");
 116                         break;
 117                 }
 118                 printf(", ");
 119                 switch (proto) {
 120                 case US_PR_CB:
 121                         printf("Command/Bulk");
 122                         break;
 123                 case US_PR_CBI:
 124                         printf("Command/Bulk/Int");
 125                         break;
 126                 case US_PR_BULK:
 127                         printf("Bulk only");
 128                         break;
 129                 default:
 130                         printf("reserved");
 131                         break;
 132                 }
 133                 break;
 134         default:
 135                 printf("%s", usb_get_class_desc(dclass));
 136                 break;
 137         }
 138 }
 139
 140 static void usb_display_string(struct usb_device *dev, int index)
 141 {
 142         ALLOC_CACHE_ALIGN_BUFFER(char, buffer, 256);
 143
 144         if (index != 0) {
 145                 if (usb_string(dev, index, &buffer[0], 256) > 0)
 146                         printf("String: \"%s\"", buffer);
 147         }
 148 }
 149
 150 static void usb_display_desc(struct usb_device *dev)
 151 {
 152         uint packet_size = dev->descriptor.bMaxPacketSize0;
 153
 154         if (dev->descriptor.bDescriptorType == USB_DT_DEVICE) {
 155                 printf("%d: %s,  USB Revision %x.%x\n", dev->devnum,
 156                 usb_get_class_desc(dev->config.if_desc[0].desc.bInterfaceClass),
 157                                    (dev->descriptor.bcdUSB>>8) & 0xff,
 158                                    dev->descriptor.bcdUSB & 0xff);
 159
 160                 if (strlen(dev->mf) || strlen(dev->prod) ||
 161                     strlen(dev->serial))
 162                         printf(" - %s %s %s\n", dev->mf, dev->prod,
 163                                 dev->serial);
 164                 if (dev->descriptor.bDeviceClass) {
 165                         printf(" - Class: ");
 166                         usb_display_class_sub(dev->descriptor.bDeviceClass,
 167                                               dev->descriptor.bDeviceSubClass,
 168                                               dev->descriptor.bDeviceProtocol);
 169                         printf("\n");
 170                 } else {
 171                         printf(" - Class: (from Interface) %s\n",
 172                                usb_get_class_desc(
 173                                 dev->config.if_desc[0].desc.bInterfaceClass));
 174                 }
 175                 if (dev->descriptor.bcdUSB >= cpu_to_le16(0x0300))
 176                         packet_size = 1 << packet_size;
 177                 printf(" - PacketSize: %d  Configurations: %d\n",
 178                         packet_size, dev->descriptor.bNumConfigurations);
 179                 printf(" - Vendor: 0x%04x  Product 0x%04x Version %d.%d\n",
 180                         dev->descriptor.idVendor, dev->descriptor.idProduct,
 181                         (dev->descriptor.bcdDevice>>8) & 0xff,
 182                         dev->descriptor.bcdDevice & 0xff);
 183         }
 184
 185 }
 186
 187 static void usb_display_conf_desc(struct usb_config_descriptor *config,
 188                                   struct usb_device *dev)
 189 {
 190         printf("   Configuration: %d\n", config->bConfigurationValue);
 191         printf("   - Interfaces: %d %s%s%dmA\n", config->bNumInterfaces,
 192                (config->bmAttributes & 0x40) ? "Self Powered " : "Bus Powered ",
 193                (config->bmAttributes & 0x20) ? "Remote Wakeup " : "",
 194                 config->bMaxPower*2);
 195         if (config->iConfiguration) {
 196                 printf("   - ");
 197                 usb_display_string(dev, config->iConfiguration);
 198                 printf("\n");
 199         }
 200 }
 201
 202 static void usb_display_if_desc(struct usb_interface_descriptor *ifdesc,
 203                                 struct usb_device *dev)
 204 {
 205         printf("     Interface: %d\n", ifdesc->bInterfaceNumber);
 206         printf("     - Alternate Setting %d, Endpoints: %d\n",
 207                 ifdesc->bAlternateSetting, ifdesc->bNumEndpoints);
 208         printf("     - Class ");
 209         usb_display_class_sub(ifdesc->bInterfaceClass,
 210                 ifdesc->bInterfaceSubClass, ifdesc->bInterfaceProtocol);
 211         printf("\n");
 212         if (ifdesc->iInterface) {
 213                 printf("     - ");
 214                 usb_display_string(dev, ifdesc->iInterface);
 215                 printf("\n");
 216         }
 217 }
 218
 219 static void usb_display_ep_desc(struct usb_endpoint_descriptor *epdesc)
 220 {
 221         printf("     - Endpoint %d %s ", epdesc->bEndpointAddress & 0xf,
 222                 (epdesc->bEndpointAddress & 0x80) ? "In" : "Out");
 223         switch ((epdesc->bmAttributes & 0x03)) {
 224         case 0:
 225                 printf("Control");
 226                 break;
 227         case 1:
 228                 printf("Isochronous");
 229                 break;
 230         case 2:
 231                 printf("Bulk");
 232                 break;
 233         case 3:
 234                 printf("Interrupt");
 235                 break;
 236         }
 237         printf(" MaxPacket %d", get_unaligned(&epdesc->wMaxPacketSize));
 238         if ((epdesc->bmAttributes & 0x03) == 0x3)
 239                 printf(" Interval %dms", epdesc->bInterval);
 240         printf("\n");
 241 }
 242
 243 /* main routine to diasplay the configs, interfaces and endpoints */
 244 static void usb_display_config(struct usb_device *dev)
 245 {
 246         struct usb_config *config;
 247         struct usb_interface *ifdesc;
 248         struct usb_endpoint_descriptor *epdesc;
 249         int i, ii;
 250
 251         config = &dev->config;
 252         usb_display_conf_desc(&config->desc, dev);
 253         for (i = 0; i < config->no_of_if; i++) {
 254                 ifdesc = &config->if_desc[i];
 255                 usb_display_if_desc(&ifdesc->desc, dev);
 256                 for (ii = 0; ii < ifdesc->no_of_ep; ii++) {
 257                         epdesc = &ifdesc->ep_desc[ii];
 258                         usb_display_ep_desc(epdesc);
 259                 }
 260         }
 261         printf("\n");
 262 }
 263
 264 /*
 265  * With driver model this isn't right since we can have multiple controllers
 266  * and the device numbering starts at 1 on each bus.
 267  * TODO(sjg@chromium.org): Add a way to specify the controller/bus.
 268  */
 269 static struct usb_device *usb_find_device(int devnum)
 270 {
 271 #ifdef CONFIG_DM_USB
 272         struct usb_device *udev;
 273         struct udevice *hub;
 274         struct uclass *uc;
 275         int ret;
 276
 277         /* Device addresses start at 1 */
 278         devnum++;
 279         ret = uclass_get(UCLASS_USB_HUB, &uc);
 280         if (ret)
 281                 return NULL;
 282
 283         uclass_foreach_dev(hub, uc) {
 284                 struct udevice *dev;
 285
 286                 if (!device_active(hub))
 287                         continue;
 288                 udev = dev_get_parent_priv(hub);
 289                 if (udev->devnum == devnum)
 290                         return udev;
 291
 292                 for (device_find_first_child(hub, &dev);
 293                      dev;
 294                      device_find_next_child(&dev)) {
 295                         if (!device_active(hub))
 296                                 continue;
 297
 298                         udev = dev_get_parent_priv(dev);
 299                         if (udev->devnum == devnum)
 300                                 return udev;
 301                 }
 302         }
 303 #else
 304         struct usb_device *udev;
 305         int d;
 306
 307         for (d = 0; d < USB_MAX_DEVICE; d++) {
 308                 udev = usb_get_dev_index(d);
 309                 if (udev == NULL)
 310                         return NULL;
 311                 if (udev->devnum == devnum)
 312                         return udev;
 313         }
 314 #endif
 315
 316         return NULL;
 317 }
 318
 319 static inline char *portspeed(int speed)
 320 {
 321         char *speed_str;
 322
 323         switch (speed) {
 324         case USB_SPEED_SUPER:
 325                 speed_str = "5 Gb/s";
 326                 break;
 327         case USB_SPEED_HIGH:
 328                 speed_str = "480 Mb/s";
 329                 break;
 330         case USB_SPEED_LOW:
 331                 speed_str = "1.5 Mb/s";
 332                 break;
 333         default:
 334                 speed_str = "12 Mb/s";
 335                 break;
 336         }
 337
 338         return speed_str;
 339 }
 340
 341 /* shows the device tree recursively */
 342 static void usb_show_tree_graph(struct usb_device *dev, char *pre)
 343 {
 344         int index;
 345         int has_child, last_child;
 346
 347         index = strlen(pre);
 348         printf(" %s", pre);
 349 #ifdef CONFIG_DM_USB
 350         has_child = device_has_active_children(dev->dev);
 351         if (device_get_uclass_id(dev->dev) == UCLASS_MASS_STORAGE) {
 352                 struct udevice *child;
 353
 354                 for (device_find_first_child(dev->dev, &child);
 355                      child;
 356                      device_find_next_child(&child)) {
 357                         if (device_get_uclass_id(child) == UCLASS_BLK)
 358                                 has_child = 0;
 359                 }
 360         }
 361 #else
 362         /* check if the device has connected children */
 363         int i;
 364
 365         has_child = 0;
 366         for (i = 0; i < dev->maxchild; i++) {
 367                 if (dev->children[i] != NULL)
 368                         has_child = 1;
 369         }
 370 #endif
 371         /* check if we are the last one */
 372 #ifdef CONFIG_DM_USB
 373         /* Not the root of the usb tree? */
 374         if (device_get_uclass_id(dev->dev->parent) != UCLASS_USB) {
 375                 last_child = device_is_last_sibling(dev->dev);
 376 #else
 377         if (dev->parent != NULL) { /* not root? */
 378                 last_child = 1;
 379                 for (i = 0; i < dev->parent->maxchild; i++) {
 380                         /* search for children */
 381                         if (dev->parent->children[i] == dev) {
 382                                 /* found our pointer, see if we have a
 383                                  * little sister
 384                                  */
 385                                 while (i++ < dev->parent->maxchild) {
 386                                         if (dev->parent->children[i] != NULL) {
 387                                                 /* found a sister */
 388                                                 last_child = 0;
 389                                                 break;
 390                                         } /* if */
 391                                 } /* while */
 392                         } /* device found */
 393                 } /* for all children of the parent */
 394 #endif
 395                 printf("\b+-");
 396                 /* correct last child */
 397                 if (last_child && index)
 398                         pre[index-1] = ' ';
 399         } /* if not root hub */
 400         else
 401                 printf(" ");
 402         printf("%d ", dev->devnum);
 403         pre[index++] = ' ';
 404         pre[index++] = has_child ? '|' : ' ';
 405         pre[index] = 0;
 406         printf(" %s (%s, %dmA)\n", usb_get_class_desc(
 407                                         dev->config.if_desc[0].desc.bInterfaceClass),
 408                                         portspeed(dev->speed),
 409                                         dev->config.desc.bMaxPower * 2);
 410         if (strlen(dev->mf) || strlen(dev->prod) || strlen(dev->serial))
 411                 printf(" %s  %s %s %s\n", pre, dev->mf, dev->prod, dev->serial);
 412         printf(" %s\n", pre);
 413 #ifdef CONFIG_DM_USB
 414         struct udevice *child;
 415
 416         for (device_find_first_child(dev->dev, &child);
 417              child;
 418              device_find_next_child(&child)) {
 419                 struct usb_device *udev;
 420
 421                 if (!device_active(child))
 422                         continue;
 423
 424                 udev = dev_get_parent_priv(child);
 425
 426                 /*
 427                  * Ignore emulators and block child devices, we only want
 428                  * real devices
 429                  */
 430                 if ((device_get_uclass_id(child) != UCLASS_USB_EMUL) &&
 431                     (device_get_uclass_id(child) != UCLASS_BLK)) {
 432                         usb_show_tree_graph(udev, pre);
 433                         pre[index] = 0;
 434                 }
 435         }
 436 #else
 437         if (dev->maxchild > 0) {
 438                 for (i = 0; i < dev->maxchild; i++) {
 439                         if (dev->children[i] != NULL) {
 440                                 usb_show_tree_graph(dev->children[i], pre);
 441                                 pre[index] = 0;
 442                         }
 443                 }
 444         }
 445 #endif
 446 }
 447
 448 /* main routine for the tree command */
 449 static void usb_show_subtree(struct usb_device *dev)
 450 {
 451         char preamble[32];
 452
 453         memset(preamble, '\0', sizeof(preamble));
 454         usb_show_tree_graph(dev, &preamble[0]);
 455 }
 456
 457 #ifdef CONFIG_DM_USB
 458 typedef void (*usb_dev_func_t)(struct usb_device *udev);
 459
 460 static void usb_for_each_root_dev(usb_dev_func_t func)
 461 {
 462         struct udevice *bus;
 463
 464         for (uclass_find_first_device(UCLASS_USB, &bus);
 465                 bus;
 466                 uclass_find_next_device(&bus)) {
 467                 struct usb_device *udev;
 468                 struct udevice *dev;
 469
 470                 if (!device_active(bus))
 471                         continue;
 472
 473                 device_find_first_child(bus, &dev);
 474                 if (dev && device_active(dev)) {
 475                         udev = dev_get_parent_priv(dev);
 476                         func(udev);
 477                 }
 478         }
 479 }
 480 #endif
 481
 482 void usb_show_tree(void)
 483 {
 484 #ifdef CONFIG_DM_USB
 485         usb_for_each_root_dev(usb_show_subtree);
 486 #else
 487         struct usb_device *udev;
 488         int i;
 489
 490         for (i = 0; i < USB_MAX_DEVICE; i++) {
 491                 udev = usb_get_dev_index(i);
 492                 if (udev == NULL)
 493                         break;
 494                 if (udev->parent == NULL)
 495                         usb_show_subtree(udev);
 496         }
 497 #endif
 498 }
 499
 500 static int usb_test(struct usb_device *dev, int port, char* arg)
 501 {
 502         int mode;
 503
 504         if (port > dev->maxchild) {
 505                 printf("Device is no hub or does not have %d ports.\n", port);
 506                 return 1;
 507         }
 508
 509         switch (arg[0]) {
 510         case 'J':
 511         case 'j':
 512                 printf("Setting Test_J mode");
 513                 mode = USB_TEST_MODE_J;
 514                 break;
 515         case 'K':
 516         case 'k':
 517                 printf("Setting Test_K mode");
 518                 mode = USB_TEST_MODE_K;
 519                 break;
 520         case 'S':
 521         case 's':
 522                 printf("Setting Test_SE0_NAK mode");
 523                 mode = USB_TEST_MODE_SE0_NAK;
 524                 break;
 525         case 'P':
 526         case 'p':
 527                 printf("Setting Test_Packet mode");
 528                 mode = USB_TEST_MODE_PACKET;
 529                 break;
 530         case 'F':
 531         case 'f':
 532                 printf("Setting Test_Force_Enable mode");
 533                 mode = USB_TEST_MODE_FORCE_ENABLE;
 534                 break;
 535         default:
 536                 printf("Unrecognized test mode: %s\nAvailable modes: "
 537                        "J, K, S[E0_NAK], P[acket], F[orce_Enable]\n", arg);
 538                 return 1;
 539         }
 540
 541         if (port)
 542                 printf(" on downstream facing port %d...\n", port);
 543         else
 544                 printf(" on upstream facing port...\n");
 545
 546         if (usb_control_msg(dev, usb_sndctrlpipe(dev, 0), USB_REQ_SET_FEATURE,
 547                             port ? USB_RT_PORT : USB_RECIP_DEVICE,
 548                             port ? USB_PORT_FEAT_TEST : USB_FEAT_TEST,
 549                             (mode << 8) | port,
 550                             NULL, 0, USB_CNTL_TIMEOUT) == -1) {
 551                 printf("Error during SET_FEATURE.\n");
 552                 return 1;
 553         } else {
 554                 printf("Test mode successfully set. Use 'usb start' "
 555                        "to return to normal operation.\n");
 556                 return 0;
 557         }
 558 }
 559
 560
 561 /******************************************************************************
 562  * usb boot command intepreter. Derived from diskboot
 563  */
 564 #ifdef CONFIG_USB_STORAGE
 565 static int do_usbboot(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 566 {
 567         return common_diskboot(cmdtp, "usb", argc, argv);
 568 }
 569 #endif /* CONFIG_USB_STORAGE */
 570
 571 static int do_usb_stop_keyboard(int force)
 572 {
 573 #if !defined CONFIG_DM_USB && defined CONFIG_USB_KEYBOARD
 574         if (usb_kbd_deregister(force) != 0) {
 575                 printf("USB not stopped: usbkbd still using USB\n");
 576                 return 1;
 577         }
 578 #endif
 579         return 0;
 580 }
 581
 582 static void do_usb_start(void)
 583 {
 584         bootstage_mark_name(BOOTSTAGE_ID_USB_START, "usb_start");
 585
 586         if (usb_init() < 0)
 587                 return;
 588
 589         /* Driver model will probe the devices as they are found */
 590 # ifdef CONFIG_USB_STORAGE
 591         /* try to recognize storage devices immediately */
 592         usb_stor_curr_dev = usb_stor_scan(1);
 593 # endif
 594 #ifndef CONFIG_DM_USB
 595 # ifdef CONFIG_USB_KEYBOARD
 596         drv_usb_kbd_init();
 597 # endif
 598 #endif /* !CONFIG_DM_USB */
 599 #ifdef CONFIG_USB_HOST_ETHER
 600 # ifdef CONFIG_DM_ETH
 601 #  ifndef CONFIG_DM_USB
 602 #   error "You must use CONFIG_DM_USB if you want to use CONFIG_USB_HOST_ETHER with CONFIG_DM_ETH"
 603 #  endif
 604 # else
 605         /* try to recognize ethernet devices immediately */
 606         usb_ether_curr_dev = usb_host_eth_scan(1);
 607 # endif
 608 #endif
 609 }
 610
 611 #ifdef CONFIG_DM_USB
 612 static void usb_show_info(struct usb_device *udev)
 613 {
 614         struct udevice *child;
 615
 616         usb_display_desc(udev);
 617         usb_display_config(udev);
 618         for (device_find_first_child(udev->dev, &child);
 619              child;
 620              device_find_next_child(&child)) {
 621                 if (device_active(child) &&
 622                     (device_get_uclass_id(child) != UCLASS_USB_EMUL) &&
 623                     (device_get_uclass_id(child) != UCLASS_BLK)) {
 624                         udev = dev_get_parent_priv(child);
 625                         usb_show_info(udev);
 626                 }
 627         }
 628 }
 629 #endif
 630
 631 /******************************************************************************
 632  * usb command intepreter
 633  */
 634 static int do_usb(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 635 {
 636         struct usb_device *udev = NULL;
 637         int i;
 638         extern char usb_started;
 639
 640         if (argc < 2)
 641                 return CMD_RET_USAGE;
 642
 643         if (strncmp(argv[1], "start", 5) == 0) {
 644                 if (usb_started)
 645                         return 0; /* Already started */
 646                 printf("starting USB...\n");
 647                 do_usb_start();
 648                 return 0;
 649         }
 650
 651         if (strncmp(argv[1], "reset", 5) == 0) {
 652                 printf("resetting USB...\n");
 653                 if (do_usb_stop_keyboard(1) != 0)
 654                         return 1;
 655                 usb_stop();
 656                 do_usb_start();
 657                 return 0;
 658         }
 659         if (strncmp(argv[1], "stop", 4) == 0) {
 660                 if (argc != 2)
 661                         console_assign(stdin, "serial");
 662                 if (do_usb_stop_keyboard(0) != 0)
 663                         return 1;
 664                 printf("stopping USB..\n");
 665                 usb_stop();
 666                 return 0;
 667         }
 668         if (!usb_started) {
 669                 printf("USB is stopped. Please issue 'usb start' first.\n");
 670                 return 1;
 671         }
 672         if (strncmp(argv[1], "tree", 4) == 0) {
 673                 puts("USB device tree:\n");
 674                 usb_show_tree();
 675                 return 0;
 676         }
 677         if (strncmp(argv[1], "inf", 3) == 0) {
 678                 if (argc == 2) {
 679 #ifdef CONFIG_DM_USB
 680                         usb_for_each_root_dev(usb_show_info);
 681 #else
 682                         int d;
 683                         for (d = 0; d < USB_MAX_DEVICE; d++) {
 684                                 udev = usb_get_dev_index(d);
 685                                 if (udev == NULL)
 686                                         break;
 687                                 usb_display_desc(udev);
 688                                 usb_display_config(udev);
 689                         }
 690 #endif
 691                         return 0;
 692                 } else {
 693                         /*
 694                          * With driver model this isn't right since we can
 695                          * have multiple controllers and the device numbering
 696                          * starts at 1 on each bus.
 697                          */
 698                         i = simple_strtoul(argv[2], NULL, 10);
 699                         printf("config for device %d\n", i);
 700                         udev = usb_find_device(i);
 701                         if (udev == NULL) {
 702                                 printf("*** No device available ***\n");
 703                                 return 0;
 704                         } else {
 705                                 usb_display_desc(udev);
 706                                 usb_display_config(udev);
 707                         }
 708                 }
 709                 return 0;
 710         }
 711         if (strncmp(argv[1], "test", 4) == 0) {
 712                 if (argc < 5)
 713                         return CMD_RET_USAGE;
 714                 i = simple_strtoul(argv[2], NULL, 10);
 715                 udev = usb_find_device(i);
 716                 if (udev == NULL) {
 717                         printf("Device %d does not exist.\n", i);
 718                         return 1;
 719                 }
 720                 i = simple_strtoul(argv[3], NULL, 10);
 721                 return usb_test(udev, i, argv[4]);
 722         }
 723 #ifdef CONFIG_USB_STORAGE
 724         if (strncmp(argv[1], "stor", 4) == 0)
 725                 return usb_stor_info();
 726
 727         return blk_common_cmd(argc, argv, IF_TYPE_USB, &usb_stor_curr_dev);
 728 #else
 729         return CMD_RET_USAGE;
 730 #endif /* CONFIG_USB_STORAGE */
 731 }
 732
 733 U_BOOT_CMD(
 734         usb,    5,      1,      do_usb,
 735         "USB sub-system",
 736         "start - start (scan) USB controller\n"
 737         "usb reset - reset (rescan) USB controller\n"
 738         "usb stop [f] - stop USB [f]=force stop\n"
 739         "usb tree - show USB device tree\n"
 740         "usb info [dev] - show available USB devices\n"
 741         "usb test [dev] [port] [mode] - set USB 2.0 test mode\n"
 742         "    (specify port 0 to indicate the device's upstream port)\n"
 743         "    Available modes: J, K, S[E0_NAK], P[acket], F[orce_Enable]\n"
 744 #ifdef CONFIG_USB_STORAGE
 745         "usb storage - show details of USB storage devices\n"
 746         "usb dev [dev] - show or set current USB storage device\n"
 747         "usb part [dev] - print partition table of one or all USB storage"
 748         "    devices\n"
 749         "usb read addr blk# cnt - read `cnt' blocks starting at block `blk#'\n"
 750         "    to memory address `addr'\n"
 751         "usb write addr blk# cnt - write `cnt' blocks starting at block `blk#'\n"
 752         "    from memory address `addr'"
 753 #endif /* CONFIG_USB_STORAGE */
 754 );
 755
 756
 757 #ifdef CONFIG_USB_STORAGE
 758 U_BOOT_CMD(
 759         usbboot,        3,      1,      do_usbboot,
 760         "boot from USB device",
 761         "loadAddr dev:part"
 762 );
 763 #endif /* CONFIG_USB_STORAGE */