drivers/usb/host/usb-uclass.c

   1 /*
   2  * (C) Copyright 2015 Google, Inc
   3  * Written by Simon Glass <sjg@chromium.org>
   4  *
   5  * usb_match_device() modified from Linux kernel v4.0.
   6  *
   7  * SPDX-License-Identifier:     GPL-2.0+
   8  */
   9
  10 #include <common.h>
  11 #include <dm.h>
  12 #include <errno.h>
  13 #include <usb.h>
  14 #include <dm/device-internal.h>
  15 #include <dm/lists.h>
  16 #include <dm/root.h>
  17 #include <dm/uclass-internal.h>
  18
  19 DECLARE_GLOBAL_DATA_PTR;
  20
  21 extern bool usb_started; /* flag for the started/stopped USB status */
  22 static bool asynch_allowed;
  23
  24 int usb_disable_asynch(int disable)
  25 {
  26         int old_value = asynch_allowed;
  27
  28         asynch_allowed = !disable;
  29         return old_value;
  30 }
  31
  32 int submit_int_msg(struct usb_device *udev, unsigned long pipe, void *buffer,
  33                    int length, int interval)
  34 {
  35         struct udevice *bus = udev->controller_dev;
  36         struct dm_usb_ops *ops = usb_get_ops(bus);
  37
  38         if (!ops->interrupt)
  39                 return -ENOSYS;
  40
  41         return ops->interrupt(bus, udev, pipe, buffer, length, interval);
  42 }
  43
  44 int submit_control_msg(struct usb_device *udev, unsigned long pipe,
  45                        void *buffer, int length, struct devrequest *setup)
  46 {
  47         struct udevice *bus = udev->controller_dev;
  48         struct dm_usb_ops *ops = usb_get_ops(bus);
  49
  50         if (!ops->control)
  51                 return -ENOSYS;
  52
  53         return ops->control(bus, udev, pipe, buffer, length, setup);
  54 }
  55
  56 int submit_bulk_msg(struct usb_device *udev, unsigned long pipe, void *buffer,
  57                     int length)
  58 {
  59         struct udevice *bus = udev->controller_dev;
  60         struct dm_usb_ops *ops = usb_get_ops(bus);
  61
  62         if (!ops->bulk)
  63                 return -ENOSYS;
  64
  65         return ops->bulk(bus, udev, pipe, buffer, length);
  66 }
  67
  68 struct int_queue *create_int_queue(struct usb_device *udev,
  69                 unsigned long pipe, int queuesize, int elementsize,
  70                 void *buffer, int interval)
  71 {
  72         struct udevice *bus = udev->controller_dev;
  73         struct dm_usb_ops *ops = usb_get_ops(bus);
  74
  75         if (!ops->create_int_queue)
  76                 return NULL;
  77
  78         return ops->create_int_queue(bus, udev, pipe, queuesize, elementsize,
  79                                      buffer, interval);
  80 }
  81
  82 void *poll_int_queue(struct usb_device *udev, struct int_queue *queue)
  83 {
  84         struct udevice *bus = udev->controller_dev;
  85         struct dm_usb_ops *ops = usb_get_ops(bus);
  86
  87         if (!ops->poll_int_queue)
  88                 return NULL;
  89
  90         return ops->poll_int_queue(bus, udev, queue);
  91 }
  92
  93 int destroy_int_queue(struct usb_device *udev, struct int_queue *queue)
  94 {
  95         struct udevice *bus = udev->controller_dev;
  96         struct dm_usb_ops *ops = usb_get_ops(bus);
  97
  98         if (!ops->destroy_int_queue)
  99                 return -ENOSYS;
 100
 101         return ops->destroy_int_queue(bus, udev, queue);
 102 }
 103
 104 int usb_alloc_device(struct usb_device *udev)
 105 {
 106         struct udevice *bus = udev->controller_dev;
 107         struct dm_usb_ops *ops = usb_get_ops(bus);
 108
 109         /* This is only requird by some controllers - current XHCI */
 110         if (!ops->alloc_device)
 111                 return 0;
 112
 113         return ops->alloc_device(bus, udev);
 114 }
 115
 116 int usb_stop(void)
 117 {
 118         struct udevice *bus;
 119         struct uclass *uc;
 120         int err = 0, ret;
 121
 122         /* De-activate any devices that have been activated */
 123         ret = uclass_get(UCLASS_USB, &uc);
 124         if (ret)
 125                 return ret;
 126         uclass_foreach_dev(bus, uc) {
 127                 ret = device_remove(bus);
 128                 if (ret && !err)
 129                         err = ret;
 130         }
 131
 132 #ifdef CONFIG_SANDBOX
 133         struct udevice *dev;
 134
 135         /* Reset all enulation devices */
 136         ret = uclass_get(UCLASS_USB_EMUL, &uc);
 137         if (ret)
 138                 return ret;
 139
 140         uclass_foreach_dev(dev, uc)
 141                 usb_emul_reset(dev);
 142 #endif
 143         usb_stor_reset();
 144         usb_hub_reset();
 145         usb_started = 0;
 146
 147         return err;
 148 }
 149
 150 static void usb_scan_bus(struct udevice *bus, bool recurse)
 151 {
 152         struct usb_bus_priv *priv;
 153         struct udevice *dev;
 154         int ret;
 155
 156         priv = dev_get_uclass_priv(bus);
 157
 158         assert(recurse);        /* TODO: Support non-recusive */
 159
 160         printf("scanning bus %d for devices... ", bus->seq);
 161         debug("\n");
 162         ret = usb_scan_device(bus, 0, USB_SPEED_FULL, &dev);
 163         if (ret)
 164                 printf("failed, error %d\n", ret);
 165         else if (priv->next_addr == 0)
 166                 printf("No USB Device found\n");
 167         else
 168                 printf("%d USB Device(s) found\n", priv->next_addr);
 169 }
 170
 171 int usb_init(void)
 172 {
 173         int controllers_initialized = 0;
 174         struct usb_bus_priv *priv;
 175         struct udevice *bus;
 176         struct uclass *uc;
 177         int count = 0;
 178         int ret;
 179
 180         asynch_allowed = 1;
 181         usb_hub_reset();
 182
 183         ret = uclass_get(UCLASS_USB, &uc);
 184         if (ret)
 185                 return ret;
 186
 187         uclass_foreach_dev(bus, uc) {
 188                 /* init low_level USB */
 189                 printf("USB%d:   ", count);
 190                 count++;
 191                 ret = device_probe(bus);
 192                 if (ret == -ENODEV) {   /* No such device. */
 193                         puts("Port not available.\n");
 194                         controllers_initialized++;
 195                         continue;
 196                 }
 197
 198                 if (ret) {              /* Other error. */
 199                         printf("probe failed, error %d\n", ret);
 200                         continue;
 201                 }
 202                 controllers_initialized++;
 203                 usb_started = true;
 204         }
 205
 206         /*
 207          * lowlevel init done, now scan the bus for devices i.e. search HUBs
 208          * and configure them, first scan primary controllers.
 209          */
 210         uclass_foreach_dev(bus, uc) {
 211                 if (!device_active(bus))
 212                         continue;
 213
 214                 priv = dev_get_uclass_priv(bus);
 215                 if (!priv->companion)
 216                         usb_scan_bus(bus, true);
 217         }
 218
 219         /*
 220          * Now that the primary controllers have been scanned and have handed
 221          * over any devices they do not understand to their companions, scan
 222          * the companions.
 223          */
 224         uclass_foreach_dev(bus, uc) {
 225                 if (!device_active(bus))
 226                         continue;
 227
 228                 priv = dev_get_uclass_priv(bus);
 229                 if (priv->companion)
 230                         usb_scan_bus(bus, true);
 231         }
 232
 233         debug("scan end\n");
 234         /* if we were not able to find at least one working bus, bail out */
 235         if (!count)
 236                 printf("No controllers found\n");
 237         else if (controllers_initialized == 0)
 238                 printf("USB error: all controllers failed lowlevel init\n");
 239
 240         return usb_started ? 0 : -1;
 241 }
 242
 243 int usb_reset_root_port(void)
 244 {
 245         return -ENOSYS;
 246 }
 247
 248 static struct usb_device *find_child_devnum(struct udevice *parent, int devnum)
 249 {
 250         struct usb_device *udev;
 251         struct udevice *dev;
 252
 253         if (!device_active(parent))
 254                 return NULL;
 255         udev = dev_get_parentdata(parent);
 256         if (udev->devnum == devnum)
 257                 return udev;
 258
 259         for (device_find_first_child(parent, &dev);
 260              dev;
 261              device_find_next_child(&dev)) {
 262                 udev = find_child_devnum(dev, devnum);
 263                 if (udev)
 264                         return udev;
 265         }
 266
 267         return NULL;
 268 }
 269
 270 struct usb_device *usb_get_dev_index(struct udevice *bus, int index)
 271 {
 272         struct udevice *hub;
 273         int devnum = index + 1; /* Addresses are allocated from 1 on USB */
 274
 275         device_find_first_child(bus, &hub);
 276         if (device_get_uclass_id(hub) == UCLASS_USB_HUB)
 277                 return find_child_devnum(hub, devnum);
 278
 279         return NULL;
 280 }
 281
 282 int usb_post_bind(struct udevice *dev)
 283 {
 284         /* Scan the bus for devices */
 285         return dm_scan_fdt_node(dev, gd->fdt_blob, dev->of_offset, false);
 286 }
 287
 288 int usb_port_reset(struct usb_device *parent, int portnr)
 289 {
 290         unsigned short portstatus;
 291         int ret;
 292
 293         debug("%s: start\n", __func__);
 294
 295         if (parent) {
 296                 /* reset the port for the second time */
 297                 assert(portnr > 0);
 298                 debug("%s: reset %d\n", __func__, portnr - 1);
 299                 ret = legacy_hub_port_reset(parent, portnr - 1, &portstatus);
 300                 if (ret < 0) {
 301                         printf("\n     Couldn't reset port %i\n", portnr);
 302                         return ret;
 303                 }
 304         } else {
 305                 debug("%s: reset root\n", __func__);
 306                 usb_reset_root_port();
 307         }
 308
 309         return 0;
 310 }
 311
 312 int usb_legacy_port_reset(struct usb_device *parent, int portnr)
 313 {
 314         return usb_port_reset(parent, portnr);
 315 }
 316
 317 int usb_setup_ehci_gadget(struct ehci_ctrl **ctlrp)
 318 {
 319         struct usb_platdata *plat;
 320         struct udevice *dev;
 321         int ret;
 322
 323         /* Find the old device and remove it */
 324         ret = uclass_find_device_by_seq(UCLASS_USB, 0, true, &dev);
 325         if (ret)
 326                 return ret;
 327         ret = device_remove(dev);
 328         if (ret)
 329                 return ret;
 330
 331         plat = dev_get_platdata(dev);
 332         plat->init_type = USB_INIT_DEVICE;
 333         ret = device_probe(dev);
 334         if (ret)
 335                 return ret;
 336         *ctlrp = dev_get_priv(dev);
 337
 338         return 0;
 339 }
 340
 341 /* returns 0 if no match, 1 if match */
 342 int usb_match_device(const struct usb_device_descriptor *desc,
 343                      const struct usb_device_id *id)
 344 {
 345         if ((id->match_flags & USB_DEVICE_ID_MATCH_VENDOR) &&
 346             id->idVendor != le16_to_cpu(desc->idVendor))
 347                 return 0;
 348
 349         if ((id->match_flags & USB_DEVICE_ID_MATCH_PRODUCT) &&
 350             id->idProduct != le16_to_cpu(desc->idProduct))
 351                 return 0;
 352
 353         /* No need to test id->bcdDevice_lo != 0, since 0 is never
 354            greater than any unsigned number. */
 355         if ((id->match_flags & USB_DEVICE_ID_MATCH_DEV_LO) &&
 356             (id->bcdDevice_lo > le16_to_cpu(desc->bcdDevice)))
 357                 return 0;
 358
 359         if ((id->match_flags & USB_DEVICE_ID_MATCH_DEV_HI) &&
 360             (id->bcdDevice_hi < le16_to_cpu(desc->bcdDevice)))
 361                 return 0;
 362
 363         if ((id->match_flags & USB_DEVICE_ID_MATCH_DEV_CLASS) &&
 364             (id->bDeviceClass != desc->bDeviceClass))
 365                 return 0;
 366
 367         if ((id->match_flags & USB_DEVICE_ID_MATCH_DEV_SUBCLASS) &&
 368             (id->bDeviceSubClass != desc->bDeviceSubClass))
 369                 return 0;
 370
 371         if ((id->match_flags & USB_DEVICE_ID_MATCH_DEV_PROTOCOL) &&
 372             (id->bDeviceProtocol != desc->bDeviceProtocol))
 373                 return 0;
 374
 375         return 1;
 376 }
 377
 378 /* returns 0 if no match, 1 if match */
 379 int usb_match_one_id_intf(const struct usb_device_descriptor *desc,
 380                           const struct usb_interface_descriptor *int_desc,
 381                           const struct usb_device_id *id)
 382 {
 383         /* The interface class, subclass, protocol and number should never be
 384          * checked for a match if the device class is Vendor Specific,
 385          * unless the match record specifies the Vendor ID. */
 386         if (desc->bDeviceClass == USB_CLASS_VENDOR_SPEC &&
 387             !(id->match_flags & USB_DEVICE_ID_MATCH_VENDOR) &&
 388             (id->match_flags & (USB_DEVICE_ID_MATCH_INT_CLASS |
 389                                 USB_DEVICE_ID_MATCH_INT_SUBCLASS |
 390                                 USB_DEVICE_ID_MATCH_INT_PROTOCOL |
 391                                 USB_DEVICE_ID_MATCH_INT_NUMBER)))
 392                 return 0;
 393
 394         if ((id->match_flags & USB_DEVICE_ID_MATCH_INT_CLASS) &&
 395             (id->bInterfaceClass != int_desc->bInterfaceClass))
 396                 return 0;
 397
 398         if ((id->match_flags & USB_DEVICE_ID_MATCH_INT_SUBCLASS) &&
 399             (id->bInterfaceSubClass != int_desc->bInterfaceSubClass))
 400                 return 0;
 401
 402         if ((id->match_flags & USB_DEVICE_ID_MATCH_INT_PROTOCOL) &&
 403             (id->bInterfaceProtocol != int_desc->bInterfaceProtocol))
 404                 return 0;
 405
 406         if ((id->match_flags & USB_DEVICE_ID_MATCH_INT_NUMBER) &&
 407             (id->bInterfaceNumber != int_desc->bInterfaceNumber))
 408                 return 0;
 409
 410         return 1;
 411 }
 412
 413 /* returns 0 if no match, 1 if match */
 414 int usb_match_one_id(struct usb_device_descriptor *desc,
 415                      struct usb_interface_descriptor *int_desc,
 416                      const struct usb_device_id *id)
 417 {
 418         if (!usb_match_device(desc, id))
 419                 return 0;
 420
 421         return usb_match_one_id_intf(desc, int_desc, id);
 422 }
 423
 424 /**
 425  * usb_find_and_bind_driver() - Find and bind the right USB driver
 426  *
 427  * This only looks at certain fields in the descriptor.
 428  */
 429 static int usb_find_and_bind_driver(struct udevice *parent,
 430                                     struct usb_device_descriptor *desc,
 431                                     struct usb_interface_descriptor *iface,
 432                                     int bus_seq, int devnum,
 433                                     struct udevice **devp)
 434 {
 435         struct usb_driver_entry *start, *entry;
 436         int n_ents;
 437         int ret;
 438         char name[30], *str;
 439
 440         *devp = NULL;
 441         debug("%s: Searching for driver\n", __func__);
 442         start = ll_entry_start(struct usb_driver_entry, usb_driver_entry);
 443         n_ents = ll_entry_count(struct usb_driver_entry, usb_driver_entry);
 444         for (entry = start; entry != start + n_ents; entry++) {
 445                 const struct usb_device_id *id;
 446                 struct udevice *dev;
 447                 const struct driver *drv;
 448                 struct usb_dev_platdata *plat;
 449
 450                 for (id = entry->match; id->match_flags; id++) {
 451                         if (!usb_match_one_id(desc, iface, id))
 452                                 continue;
 453
 454                         drv = entry->driver;
 455                         /*
 456                          * We could pass the descriptor to the driver as
 457                          * platdata (instead of NULL) and allow its bind()
 458                          * method to return -ENOENT if it doesn't support this
 459                          * device. That way we could continue the search to
 460                          * find another driver. For now this doesn't seem
 461                          * necesssary, so just bind the first match.
 462                          */
 463                         ret = device_bind(parent, drv, drv->name, NULL, -1,
 464                                           &dev);
 465                         if (ret)
 466                                 goto error;
 467                         debug("%s: Match found: %s\n", __func__, drv->name);
 468                         dev->driver_data = id->driver_info;
 469                         plat = dev_get_parent_platdata(dev);
 470                         plat->id = *id;
 471                         *devp = dev;
 472                         return 0;
 473                 }
 474         }
 475
 476         /* Bind a generic driver so that the device can be used */
 477         snprintf(name, sizeof(name), "generic_bus_%x_dev_%x", bus_seq, devnum);
 478         str = strdup(name);
 479         if (!str)
 480                 return -ENOMEM;
 481         ret = device_bind_driver(parent, "usb_dev_generic_drv", str, devp);
 482
 483 error:
 484         debug("%s: No match found: %d\n", __func__, ret);
 485         return ret;
 486 }
 487
 488 /**
 489  * usb_find_child() - Find an existing device which matches our needs
 490  *
 491  *
 492  */
 493 static int usb_find_child(struct udevice *parent,
 494                           struct usb_device_descriptor *desc,
 495                           struct usb_interface_descriptor *iface,
 496                           struct udevice **devp)
 497 {
 498         struct udevice *dev;
 499
 500         *devp = NULL;
 501         for (device_find_first_child(parent, &dev);
 502              dev;
 503              device_find_next_child(&dev)) {
 504                 struct usb_dev_platdata *plat = dev_get_parent_platdata(dev);
 505
 506                 /* If this device is already in use, skip it */
 507                 if (device_active(dev))
 508                         continue;
 509                 debug("   %s: name='%s', plat=%d, desc=%d\n", __func__,
 510                       dev->name, plat->id.bDeviceClass, desc->bDeviceClass);
 511                 if (usb_match_one_id(desc, iface, &plat->id)) {
 512                         *devp = dev;
 513                         return 0;
 514                 }
 515         }
 516
 517         return -ENOENT;
 518 }
 519
 520 int usb_scan_device(struct udevice *parent, int port,
 521                     enum usb_device_speed speed, struct udevice **devp)
 522 {
 523         struct udevice *dev;
 524         bool created = false;
 525         struct usb_dev_platdata *plat;
 526         struct usb_bus_priv *priv;
 527         struct usb_device *parent_udev;
 528         int ret;
 529         ALLOC_CACHE_ALIGN_BUFFER(struct usb_device, udev, 1);
 530         struct usb_interface_descriptor *iface = &udev->config.if_desc[0].desc;
 531
 532         *devp = NULL;
 533         memset(udev, '\0', sizeof(*udev));
 534         udev->controller_dev = usb_get_bus(parent);
 535         priv = dev_get_uclass_priv(udev->controller_dev);
 536
 537         /*
 538          * Somewhat nasty, this. We create a local device and use the normal
 539          * USB stack to read its descriptor. Then we know what type of device
 540          * to create for real.
 541          *
 542          * udev->dev is set to the parent, since we don't have a real device
 543          * yet. The USB stack should not access udev.dev anyway, except perhaps
 544          * to find the controller, and the controller will either be @parent,
 545          * or some parent of @parent.
 546          *
 547          * Another option might be to create the device as a generic USB
 548          * device, then morph it into the correct one when we know what it
 549          * should be. This means that a generic USB device would morph into
 550          * a network controller, or a USB flash stick, for example. However,
 551          * we don't support such morphing and it isn't clear that it would
 552          * be easy to do.
 553          *
 554          * Yet another option is to split out the USB stack parts of udev
 555          * into something like a 'struct urb' (as Linux does) which can exist
 556          * independently of any device. This feels cleaner, but calls for quite
 557          * a big change to the USB stack.
 558          *
 559          * For now, the approach is to set up an empty udev, read its
 560          * descriptor and assign it an address, then bind a real device and
 561          * stash the resulting information into the device's parent
 562          * platform data. Then when we probe it, usb_child_pre_probe() is called
 563          * and it will pull the information out of the stash.
 564          */
 565         udev->dev = parent;
 566         udev->speed = speed;
 567         udev->devnum = priv->next_addr + 1;
 568         udev->portnr = port;
 569         debug("Calling usb_setup_device(), portnr=%d\n", udev->portnr);
 570         parent_udev = device_get_uclass_id(parent) == UCLASS_USB_HUB ?
 571                 dev_get_parentdata(parent) : NULL;
 572         ret = usb_setup_device(udev, priv->desc_before_addr, parent_udev, port);
 573         debug("read_descriptor for '%s': ret=%d\n", parent->name, ret);
 574         if (ret)
 575                 return ret;
 576         ret = usb_find_child(parent, &udev->descriptor, iface, &dev);
 577         debug("** usb_find_child returns %d\n", ret);
 578         if (ret) {
 579                 if (ret != -ENOENT)
 580                         return ret;
 581                 ret = usb_find_and_bind_driver(parent, &udev->descriptor, iface,
 582                                                udev->controller_dev->seq,
 583                                                udev->devnum, &dev);
 584                 if (ret)
 585                         return ret;
 586                 created = true;
 587         }
 588         plat = dev_get_parent_platdata(dev);
 589         debug("%s: Probing '%s', plat=%p\n", __func__, dev->name, plat);
 590         plat->devnum = udev->devnum;
 591         plat->udev = udev;
 592         priv->next_addr++;
 593         ret = device_probe(dev);
 594         if (ret) {
 595                 debug("%s: Device '%s' probe failed\n", __func__, dev->name);
 596                 priv->next_addr--;
 597                 if (created)
 598                         device_unbind(dev);
 599                 return ret;
 600         }
 601         *devp = dev;
 602
 603         return 0;
 604 }
 605
 606 int usb_child_post_bind(struct udevice *dev)
 607 {
 608         struct usb_dev_platdata *plat = dev_get_parent_platdata(dev);
 609         const void *blob = gd->fdt_blob;
 610         int val;
 611
 612         if (dev->of_offset == -1)
 613                 return 0;
 614
 615         /* We only support matching a few things */
 616         val = fdtdec_get_int(blob, dev->of_offset, "usb,device-class", -1);
 617         if (val != -1) {
 618                 plat->id.match_flags |= USB_DEVICE_ID_MATCH_DEV_CLASS;
 619                 plat->id.bDeviceClass = val;
 620         }
 621         val = fdtdec_get_int(blob, dev->of_offset, "usb,interface-class", -1);
 622         if (val != -1) {
 623                 plat->id.match_flags |= USB_DEVICE_ID_MATCH_INT_CLASS;
 624                 plat->id.bInterfaceClass = val;
 625         }
 626
 627         return 0;
 628 }
 629
 630 struct udevice *usb_get_bus(struct udevice *dev)
 631 {
 632         struct udevice *bus;
 633
 634         for (bus = dev; bus && device_get_uclass_id(bus) != UCLASS_USB; )
 635                 bus = bus->parent;
 636         if (!bus) {
 637                 /* By design this cannot happen */
 638                 assert(bus);
 639                 debug("USB HUB '%s' does not have a controller\n", dev->name);
 640         }
 641
 642         return bus;
 643 }
 644
 645 int usb_child_pre_probe(struct udevice *dev)
 646 {
 647         struct usb_device *udev = dev_get_parentdata(dev);
 648         struct usb_dev_platdata *plat = dev_get_parent_platdata(dev);
 649         int ret;
 650
 651         if (plat->udev) {
 652                 /*
 653                  * Copy over all the values set in the on stack struct
 654                  * usb_device in usb_scan_device() to our final struct
 655                  * usb_device for this dev.
 656                  */
 657                 *udev = *(plat->udev);
 658                 /* And clear plat->udev as it will not be valid for long */
 659                 plat->udev = NULL;
 660                 udev->dev = dev;
 661         } else {
 662                 /*
 663                  * This happens with devices which are explicitly bound
 664                  * instead of being discovered through usb_scan_device()
 665                  * such as sandbox emul devices.
 666                  */
 667                 udev->dev = dev;
 668                 udev->controller_dev = usb_get_bus(dev);
 669                 udev->devnum = plat->devnum;
 670
 671                 /*
 672                  * udev did not go through usb_scan_device(), so we need to
 673                  * select the config and read the config descriptors.
 674                  */
 675                 ret = usb_select_config(udev);
 676                 if (ret)
 677                         return ret;
 678         }
 679
 680         return 0;
 681 }
 682
 683 UCLASS_DRIVER(usb) = {
 684         .id             = UCLASS_USB,
 685         .name           = "usb",
 686         .flags          = DM_UC_FLAG_SEQ_ALIAS,
 687         .post_bind      = usb_post_bind,
 688         .per_child_auto_alloc_size = sizeof(struct usb_device),
 689         .per_device_auto_alloc_size = sizeof(struct usb_bus_priv),
 690         .child_post_bind = usb_child_post_bind,
 691         .child_pre_probe = usb_child_pre_probe,
 692         .per_child_platdata_auto_alloc_size = sizeof(struct usb_dev_platdata),
 693 };
 694
 695 UCLASS_DRIVER(usb_dev_generic) = {
 696         .id             = UCLASS_USB_DEV_GENERIC,
 697         .name           = "usb_dev_generic",
 698 };
 699
 700 U_BOOT_DRIVER(usb_dev_generic_drv) = {
 701         .id             = UCLASS_USB_DEV_GENERIC,
 702         .name           = "usb_dev_generic_drv",
 703 };