hw/usb/bus.c

   1 #include "hw/hw.h"
   2 #include "hw/usb.h"
   3 #include "hw/qdev.h"
   4 #include "sysemu/sysemu.h"
   5 #include "monitor/monitor.h"
   6 #include "trace.h"
   7
   8 static void usb_bus_dev_print(Monitor *mon, DeviceState *qdev, int indent);
   9
  10 static char *usb_get_dev_path(DeviceState *dev);
  11 static char *usb_get_fw_dev_path(DeviceState *qdev);
  12 static void usb_qdev_unrealize(DeviceState *qdev, Error **errp);
  13
  14 static Property usb_props[] = {
  15     DEFINE_PROP_STRING("port", USBDevice, port_path),
  16     DEFINE_PROP_STRING("serial", USBDevice, serial),
  17     DEFINE_PROP_BIT("full-path", USBDevice, flags,
  18                     USB_DEV_FLAG_FULL_PATH, true),
  19     DEFINE_PROP_BIT("msos-desc", USBDevice, flags,
  20                     USB_DEV_FLAG_MSOS_DESC_ENABLE, true),
  21     DEFINE_PROP_END_OF_LIST()
  22 };
  23
  24 static void usb_bus_class_init(ObjectClass *klass, void *data)
  25 {
  26     BusClass *k = BUS_CLASS(klass);
  27     HotplugHandlerClass *hc = HOTPLUG_HANDLER_CLASS(klass);
  28
  29     k->print_dev = usb_bus_dev_print;
  30     k->get_dev_path = usb_get_dev_path;
  31     k->get_fw_dev_path = usb_get_fw_dev_path;
  32     hc->unplug = qdev_simple_device_unplug_cb;
  33 }
  34
  35 static const TypeInfo usb_bus_info = {
  36     .name = TYPE_USB_BUS,
  37     .parent = TYPE_BUS,
  38     .instance_size = sizeof(USBBus),
  39     .class_init = usb_bus_class_init,
  40     .interfaces = (InterfaceInfo[]) {
  41         { TYPE_HOTPLUG_HANDLER },
  42         { }
  43     }
  44 };
  45
  46 static int next_usb_bus = 0;
  47 static QTAILQ_HEAD(, USBBus) busses = QTAILQ_HEAD_INITIALIZER(busses);
  48
  49 static int usb_device_post_load(void *opaque, int version_id)
  50 {
  51     USBDevice *dev = opaque;
  52
  53     if (dev->state == USB_STATE_NOTATTACHED) {
  54         dev->attached = 0;
  55     } else {
  56         dev->attached = 1;
  57     }
  58     if (dev->setup_index < 0 ||
  59         dev->setup_len < 0 ||
  60         dev->setup_index > dev->setup_len ||
  61         dev->setup_len > sizeof(dev->data_buf)) {
  62         return -EINVAL;
  63     }
  64     return 0;
  65 }
  66
  67 const VMStateDescription vmstate_usb_device = {
  68     .name = "USBDevice",
  69     .version_id = 1,
  70     .minimum_version_id = 1,
  71     .post_load = usb_device_post_load,
  72     .fields = (VMStateField[]) {
  73         VMSTATE_UINT8(addr, USBDevice),
  74         VMSTATE_INT32(state, USBDevice),
  75         VMSTATE_INT32(remote_wakeup, USBDevice),
  76         VMSTATE_INT32(setup_state, USBDevice),
  77         VMSTATE_INT32(setup_len, USBDevice),
  78         VMSTATE_INT32(setup_index, USBDevice),
  79         VMSTATE_UINT8_ARRAY(setup_buf, USBDevice, 8),
  80         VMSTATE_END_OF_LIST(),
  81     }
  82 };
  83
  84 void usb_bus_new(USBBus *bus, size_t bus_size,
  85                  USBBusOps *ops, DeviceState *host)
  86 {
  87     qbus_create_inplace(bus, bus_size, TYPE_USB_BUS, host, NULL);
  88     qbus_set_bus_hotplug_handler(BUS(bus), &error_abort);
  89     bus->ops = ops;
  90     bus->busnr = next_usb_bus++;
  91     QTAILQ_INIT(&bus->free);
  92     QTAILQ_INIT(&bus->used);
  93     QTAILQ_INSERT_TAIL(&busses, bus, next);
  94 }
  95
  96 void usb_bus_release(USBBus *bus)
  97 {
  98     assert(next_usb_bus > 0);
  99
 100     QTAILQ_REMOVE(&busses, bus, next);
 101 }
 102
 103 USBBus *usb_bus_find(int busnr)
 104 {
 105     USBBus *bus;
 106
 107     if (-1 == busnr)
 108         return QTAILQ_FIRST(&busses);
 109     QTAILQ_FOREACH(bus, &busses, next) {
 110         if (bus->busnr == busnr)
 111             return bus;
 112     }
 113     return NULL;
 114 }
 115
 116 static void usb_device_realize(USBDevice *dev, Error **errp)
 117 {
 118     USBDeviceClass *klass = USB_DEVICE_GET_CLASS(dev);
 119
 120     if (klass->realize) {
 121         klass->realize(dev, errp);
 122     }
 123 }
 124
 125 USBDevice *usb_device_find_device(USBDevice *dev, uint8_t addr)
 126 {
 127     USBDeviceClass *klass = USB_DEVICE_GET_CLASS(dev);
 128     if (klass->find_device) {
 129         return klass->find_device(dev, addr);
 130     }
 131     return NULL;
 132 }
 133
 134 static void usb_device_handle_destroy(USBDevice *dev)
 135 {
 136     USBDeviceClass *klass = USB_DEVICE_GET_CLASS(dev);
 137     if (klass->handle_destroy) {
 138         klass->handle_destroy(dev);
 139     }
 140 }
 141
 142 void usb_device_cancel_packet(USBDevice *dev, USBPacket *p)
 143 {
 144     USBDeviceClass *klass = USB_DEVICE_GET_CLASS(dev);
 145     if (klass->cancel_packet) {
 146         klass->cancel_packet(dev, p);
 147     }
 148 }
 149
 150 void usb_device_handle_attach(USBDevice *dev)
 151 {
 152     USBDeviceClass *klass = USB_DEVICE_GET_CLASS(dev);
 153     if (klass->handle_attach) {
 154         klass->handle_attach(dev);
 155     }
 156 }
 157
 158 void usb_device_handle_reset(USBDevice *dev)
 159 {
 160     USBDeviceClass *klass = USB_DEVICE_GET_CLASS(dev);
 161     if (klass->handle_reset) {
 162         klass->handle_reset(dev);
 163     }
 164 }
 165
 166 void usb_device_handle_control(USBDevice *dev, USBPacket *p, int request,
 167                                int value, int index, int length, uint8_t *data)
 168 {
 169     USBDeviceClass *klass = USB_DEVICE_GET_CLASS(dev);
 170     if (klass->handle_control) {
 171         klass->handle_control(dev, p, request, value, index, length, data);
 172     }
 173 }
 174
 175 void usb_device_handle_data(USBDevice *dev, USBPacket *p)
 176 {
 177     USBDeviceClass *klass = USB_DEVICE_GET_CLASS(dev);
 178     if (klass->handle_data) {
 179         klass->handle_data(dev, p);
 180     }
 181 }
 182
 183 const char *usb_device_get_product_desc(USBDevice *dev)
 184 {
 185     USBDeviceClass *klass = USB_DEVICE_GET_CLASS(dev);
 186     return klass->product_desc;
 187 }
 188
 189 const USBDesc *usb_device_get_usb_desc(USBDevice *dev)
 190 {
 191     USBDeviceClass *klass = USB_DEVICE_GET_CLASS(dev);
 192     if (dev->usb_desc) {
 193         return dev->usb_desc;
 194     }
 195     return klass->usb_desc;
 196 }
 197
 198 void usb_device_set_interface(USBDevice *dev, int interface,
 199                               int alt_old, int alt_new)
 200 {
 201     USBDeviceClass *klass = USB_DEVICE_GET_CLASS(dev);
 202     if (klass->set_interface) {
 203         klass->set_interface(dev, interface, alt_old, alt_new);
 204     }
 205 }
 206
 207 void usb_device_flush_ep_queue(USBDevice *dev, USBEndpoint *ep)
 208 {
 209     USBDeviceClass *klass = USB_DEVICE_GET_CLASS(dev);
 210     if (klass->flush_ep_queue) {
 211         klass->flush_ep_queue(dev, ep);
 212     }
 213 }
 214
 215 void usb_device_ep_stopped(USBDevice *dev, USBEndpoint *ep)
 216 {
 217     USBDeviceClass *klass = USB_DEVICE_GET_CLASS(dev);
 218     if (klass->ep_stopped) {
 219         klass->ep_stopped(dev, ep);
 220     }
 221 }
 222
 223 int usb_device_alloc_streams(USBDevice *dev, USBEndpoint **eps, int nr_eps,
 224                              int streams)
 225 {
 226     USBDeviceClass *klass = USB_DEVICE_GET_CLASS(dev);
 227     if (klass->alloc_streams) {
 228         return klass->alloc_streams(dev, eps, nr_eps, streams);
 229     }
 230     return 0;
 231 }
 232
 233 void usb_device_free_streams(USBDevice *dev, USBEndpoint **eps, int nr_eps)
 234 {
 235     USBDeviceClass *klass = USB_DEVICE_GET_CLASS(dev);
 236     if (klass->free_streams) {
 237         klass->free_streams(dev, eps, nr_eps);
 238     }
 239 }
 240
 241 static void usb_qdev_realize(DeviceState *qdev, Error **errp)
 242 {
 243     USBDevice *dev = USB_DEVICE(qdev);
 244     Error *local_err = NULL;
 245
 246     pstrcpy(dev->product_desc, sizeof(dev->product_desc),
 247             usb_device_get_product_desc(dev));
 248     dev->auto_attach = 1;
 249     QLIST_INIT(&dev->strings);
 250     usb_ep_init(dev);
 251
 252     usb_claim_port(dev, &local_err);
 253     if (local_err) {
 254         error_propagate(errp, local_err);
 255         return;
 256     }
 257
 258     usb_device_realize(dev, &local_err);
 259     if (local_err) {
 260         usb_release_port(dev);
 261         error_propagate(errp, local_err);
 262         return;
 263     }
 264
 265     if (dev->auto_attach) {
 266         usb_device_attach(dev, &local_err);
 267         if (local_err) {
 268             usb_qdev_unrealize(qdev, NULL);
 269             error_propagate(errp, local_err);
 270             return;
 271         }
 272     }
 273 }
 274
 275 static void usb_qdev_unrealize(DeviceState *qdev, Error **errp)
 276 {
 277     USBDevice *dev = USB_DEVICE(qdev);
 278
 279     if (dev->attached) {
 280         usb_device_detach(dev);
 281     }
 282     usb_device_handle_destroy(dev);
 283     if (dev->port) {
 284         usb_release_port(dev);
 285     }
 286 }
 287
 288 typedef struct LegacyUSBFactory
 289 {
 290     const char *name;
 291     const char *usbdevice_name;
 292     USBDevice *(*usbdevice_init)(USBBus *bus, const char *params);
 293 } LegacyUSBFactory;
 294
 295 static GSList *legacy_usb_factory;
 296
 297 void usb_legacy_register(const char *typename, const char *usbdevice_name,
 298                          USBDevice *(*usbdevice_init)(USBBus *bus,
 299                                                       const char *params))
 300 {
 301     if (usbdevice_name) {
 302         LegacyUSBFactory *f = g_malloc0(sizeof(*f));
 303         f->name = typename;
 304         f->usbdevice_name = usbdevice_name;
 305         f->usbdevice_init = usbdevice_init;
 306         legacy_usb_factory = g_slist_append(legacy_usb_factory, f);
 307     }
 308 }
 309
 310 USBDevice *usb_create(USBBus *bus, const char *name)
 311 {
 312     DeviceState *dev;
 313
 314     dev = qdev_create(&bus->qbus, name);
 315     return USB_DEVICE(dev);
 316 }
 317
 318 USBDevice *usb_create_simple(USBBus *bus, const char *name)
 319 {
 320     USBDevice *dev = usb_create(bus, name);
 321     int rc;
 322
 323     if (!dev) {
 324         error_report("Failed to create USB device '%s'", name);
 325         return NULL;
 326     }
 327     rc = qdev_init(&dev->qdev);
 328     if (rc < 0) {
 329         error_report("Failed to initialize USB device '%s'", name);
 330         return NULL;
 331     }
 332     return dev;
 333 }
 334
 335 static void usb_fill_port(USBPort *port, void *opaque, int index,
 336                           USBPortOps *ops, int speedmask)
 337 {
 338     port->opaque = opaque;
 339     port->index = index;
 340     port->ops = ops;
 341     port->speedmask = speedmask;
 342     usb_port_location(port, NULL, index + 1);
 343 }
 344
 345 void usb_register_port(USBBus *bus, USBPort *port, void *opaque, int index,
 346                        USBPortOps *ops, int speedmask)
 347 {
 348     usb_fill_port(port, opaque, index, ops, speedmask);
 349     QTAILQ_INSERT_TAIL(&bus->free, port, next);
 350     bus->nfree++;
 351 }
 352
 353 int usb_register_companion(const char *masterbus, USBPort *ports[],
 354                            uint32_t portcount, uint32_t firstport,
 355                            void *opaque, USBPortOps *ops, int speedmask)
 356 {
 357     USBBus *bus;
 358     int i;
 359
 360     QTAILQ_FOREACH(bus, &busses, next) {
 361         if (strcmp(bus->qbus.name, masterbus) == 0) {
 362             break;
 363         }
 364     }
 365
 366     if (!bus || !bus->ops->register_companion) {
 367         qerror_report(QERR_INVALID_PARAMETER_VALUE, "masterbus",
 368                       "an USB masterbus");
 369         if (bus) {
 370             error_printf_unless_qmp(
 371                 "USB bus '%s' does not allow companion controllers\n",
 372                 masterbus);
 373         }
 374         return -1;
 375     }
 376
 377     for (i = 0; i < portcount; i++) {
 378         usb_fill_port(ports[i], opaque, i, ops, speedmask);
 379     }
 380
 381     return bus->ops->register_companion(bus, ports, portcount, firstport);
 382 }
 383
 384 void usb_port_location(USBPort *downstream, USBPort *upstream, int portnr)
 385 {
 386     if (upstream) {
 387         snprintf(downstream->path, sizeof(downstream->path), "%s.%d",
 388                  upstream->path, portnr);
 389         downstream->hubcount = upstream->hubcount + 1;
 390     } else {
 391         snprintf(downstream->path, sizeof(downstream->path), "%d", portnr);
 392         downstream->hubcount = 0;
 393     }
 394 }
 395
 396 void usb_unregister_port(USBBus *bus, USBPort *port)
 397 {
 398     if (port->dev) {
 399         object_unparent(OBJECT(port->dev));
 400     }
 401     QTAILQ_REMOVE(&bus->free, port, next);
 402     bus->nfree--;
 403 }
 404
 405 void usb_claim_port(USBDevice *dev, Error **errp)
 406 {
 407     USBBus *bus = usb_bus_from_device(dev);
 408     USBPort *port;
 409
 410     assert(dev->port == NULL);
 411
 412     if (dev->port_path) {
 413         QTAILQ_FOREACH(port, &bus->free, next) {
 414             if (strcmp(port->path, dev->port_path) == 0) {
 415                 break;
 416             }
 417         }
 418         if (port == NULL) {
 419             error_setg(errp, "Error: usb port %s (bus %s) not found (in use?)",
 420                        dev->port_path, bus->qbus.name);
 421             return;
 422         }
 423     } else {
 424         if (bus->nfree == 1 && strcmp(object_get_typename(OBJECT(dev)), "usb-hub") != 0) {
 425             /* Create a new hub and chain it on */
 426             usb_create_simple(bus, "usb-hub");
 427         }
 428         if (bus->nfree == 0) {
 429             error_setg(errp, "Error: tried to attach usb device %s to a bus "
 430                        "with no free ports", dev->product_desc);
 431             return;
 432         }
 433         port = QTAILQ_FIRST(&bus->free);
 434     }
 435     trace_usb_port_claim(bus->busnr, port->path);
 436
 437     QTAILQ_REMOVE(&bus->free, port, next);
 438     bus->nfree--;
 439
 440     dev->port = port;
 441     port->dev = dev;
 442
 443     QTAILQ_INSERT_TAIL(&bus->used, port, next);
 444     bus->nused++;
 445 }
 446
 447 void usb_release_port(USBDevice *dev)
 448 {
 449     USBBus *bus = usb_bus_from_device(dev);
 450     USBPort *port = dev->port;
 451
 452     assert(port != NULL);
 453     trace_usb_port_release(bus->busnr, port->path);
 454
 455     QTAILQ_REMOVE(&bus->used, port, next);
 456     bus->nused--;
 457
 458     dev->port = NULL;
 459     port->dev = NULL;
 460
 461     QTAILQ_INSERT_TAIL(&bus->free, port, next);
 462     bus->nfree++;
 463 }
 464
 465 static void usb_mask_to_str(char *dest, size_t size,
 466                             unsigned int speedmask)
 467 {
 468     static const struct {
 469         unsigned int mask;
 470         const char *name;
 471     } speeds[] = {
 472         { .mask = USB_SPEED_MASK_FULL,  .name = "full"  },
 473         { .mask = USB_SPEED_MASK_HIGH,  .name = "high"  },
 474         { .mask = USB_SPEED_MASK_SUPER, .name = "super" },
 475     };
 476     int i, pos = 0;
 477
 478     for (i = 0; i < ARRAY_SIZE(speeds); i++) {
 479         if (speeds[i].mask & speedmask) {
 480             pos += snprintf(dest + pos, size - pos, "%s%s",
 481                             pos ? "+" : "",
 482                             speeds[i].name);
 483         }
 484     }
 485 }
 486
 487 void usb_check_attach(USBDevice *dev, Error **errp)
 488 {
 489     USBBus *bus = usb_bus_from_device(dev);
 490     USBPort *port = dev->port;
 491     char devspeed[32], portspeed[32];
 492
 493     assert(port != NULL);
 494     assert(!dev->attached);
 495     usb_mask_to_str(devspeed, sizeof(devspeed), dev->speedmask);
 496     usb_mask_to_str(portspeed, sizeof(portspeed), port->speedmask);
 497     trace_usb_port_attach(bus->busnr, port->path,
 498                           devspeed, portspeed);
 499
 500     if (!(port->speedmask & dev->speedmask)) {
 501         error_setg(errp, "Warning: speed mismatch trying to attach"
 502                    " usb device \"%s\" (%s speed)"
 503                    " to bus \"%s\", port \"%s\" (%s speed)",
 504                    dev->product_desc, devspeed,
 505                    bus->qbus.name, port->path, portspeed);
 506         return;
 507     }
 508 }
 509
 510 void usb_device_attach(USBDevice *dev, Error **errp)
 511 {
 512     USBPort *port = dev->port;
 513     Error *local_err = NULL;
 514
 515     usb_check_attach(dev, &local_err);
 516     if (local_err) {
 517         error_propagate(errp, local_err);
 518         return;
 519     }
 520
 521     dev->attached++;
 522     usb_attach(port);
 523 }
 524
 525 int usb_device_detach(USBDevice *dev)
 526 {
 527     USBBus *bus = usb_bus_from_device(dev);
 528     USBPort *port = dev->port;
 529
 530     assert(port != NULL);
 531     assert(dev->attached);
 532     trace_usb_port_detach(bus->busnr, port->path);
 533
 534     usb_detach(port);
 535     dev->attached--;
 536     return 0;
 537 }
 538
 539 int usb_device_delete_addr(int busnr, int addr)
 540 {
 541     USBBus *bus;
 542     USBPort *port;
 543     USBDevice *dev;
 544
 545     bus = usb_bus_find(busnr);
 546     if (!bus)
 547         return -1;
 548
 549     QTAILQ_FOREACH(port, &bus->used, next) {
 550         if (port->dev->addr == addr)
 551             break;
 552     }
 553     if (!port)
 554         return -1;
 555     dev = port->dev;
 556
 557     object_unparent(OBJECT(dev));
 558     return 0;
 559 }
 560
 561 static const char *usb_speed(unsigned int speed)
 562 {
 563     static const char *txt[] = {
 564         [ USB_SPEED_LOW  ] = "1.5",
 565         [ USB_SPEED_FULL ] = "12",
 566         [ USB_SPEED_HIGH ] = "480",
 567         [ USB_SPEED_SUPER ] = "5000",
 568     };
 569     if (speed >= ARRAY_SIZE(txt))
 570         return "?";
 571     return txt[speed];
 572 }
 573
 574 static void usb_bus_dev_print(Monitor *mon, DeviceState *qdev, int indent)
 575 {
 576     USBDevice *dev = USB_DEVICE(qdev);
 577     USBBus *bus = usb_bus_from_device(dev);
 578
 579     monitor_printf(mon, "%*saddr %d.%d, port %s, speed %s, name %s%s\n",
 580                    indent, "", bus->busnr, dev->addr,
 581                    dev->port ? dev->port->path : "-",
 582                    usb_speed(dev->speed), dev->product_desc,
 583                    dev->attached ? ", attached" : "");
 584 }
 585
 586 static char *usb_get_dev_path(DeviceState *qdev)
 587 {
 588     USBDevice *dev = USB_DEVICE(qdev);
 589     DeviceState *hcd = qdev->parent_bus->parent;
 590     char *id = NULL;
 591
 592     if (dev->flags & (1 << USB_DEV_FLAG_FULL_PATH)) {
 593         id = qdev_get_dev_path(hcd);
 594     }
 595     if (id) {
 596         char *ret = g_strdup_printf("%s/%s", id, dev->port->path);
 597         g_free(id);
 598         return ret;
 599     } else {
 600         return g_strdup(dev->port->path);
 601     }
 602 }
 603
 604 static char *usb_get_fw_dev_path(DeviceState *qdev)
 605 {
 606     USBDevice *dev = USB_DEVICE(qdev);
 607     char *fw_path, *in;
 608     ssize_t pos = 0, fw_len;
 609     long nr;
 610
 611     fw_len = 32 + strlen(dev->port->path) * 6;
 612     fw_path = g_malloc(fw_len);
 613     in = dev->port->path;
 614     while (fw_len - pos > 0) {
 615         nr = strtol(in, &in, 10);
 616         if (in[0] == '.') {
 617             /* some hub between root port and device */
 618             pos += snprintf(fw_path + pos, fw_len - pos, "hub@%lx/", nr);
 619             in++;
 620         } else {
 621             /* the device itself */
 622             pos += snprintf(fw_path + pos, fw_len - pos, "%s@%lx",
 623                             qdev_fw_name(qdev), nr);
 624             break;
 625         }
 626     }
 627     return fw_path;
 628 }
 629
 630 void usb_info(Monitor *mon, const QDict *qdict)
 631 {
 632     USBBus *bus;
 633     USBDevice *dev;
 634     USBPort *port;
 635
 636     if (QTAILQ_EMPTY(&busses)) {
 637         monitor_printf(mon, "USB support not enabled\n");
 638         return;
 639     }
 640
 641     QTAILQ_FOREACH(bus, &busses, next) {
 642         QTAILQ_FOREACH(port, &bus->used, next) {
 643             dev = port->dev;
 644             if (!dev)
 645                 continue;
 646             monitor_printf(mon, "  Device %d.%d, Port %s, Speed %s Mb/s, Product %s\n",
 647                            bus->busnr, dev->addr, port->path, usb_speed(dev->speed),
 648                            dev->product_desc);
 649         }
 650     }
 651 }
 652
 653 /* handle legacy -usbdevice cmd line option */
 654 USBDevice *usbdevice_create(const char *cmdline)
 655 {
 656     USBBus *bus = usb_bus_find(-1 /* any */);
 657     LegacyUSBFactory *f = NULL;
 658     GSList *i;
 659     char driver[32];
 660     const char *params;
 661     int len;
 662
 663     params = strchr(cmdline,':');
 664     if (params) {
 665         params++;
 666         len = params - cmdline;
 667         if (len > sizeof(driver))
 668             len = sizeof(driver);
 669         pstrcpy(driver, len, cmdline);
 670     } else {
 671         params = "";
 672         pstrcpy(driver, sizeof(driver), cmdline);
 673     }
 674
 675     for (i = legacy_usb_factory; i; i = i->next) {
 676         f = i->data;
 677         if (strcmp(f->usbdevice_name, driver) == 0) {
 678             break;
 679         }
 680     }
 681     if (i == NULL) {
 682 #if 0
 683         /* no error because some drivers are not converted (yet) */
 684         error_report("usbdevice %s not found", driver);
 685 #endif
 686         return NULL;
 687     }
 688
 689     if (!bus) {
 690         error_report("Error: no usb bus to attach usbdevice %s, "
 691                      "please try -machine usb=on and check that "
 692                      "the machine model supports USB", driver);
 693         return NULL;
 694     }
 695
 696     if (!f->usbdevice_init) {
 697         if (*params) {
 698             error_report("usbdevice %s accepts no params", driver);
 699             return NULL;
 700         }
 701         return usb_create_simple(bus, f->name);
 702     }
 703     return f->usbdevice_init(bus, params);
 704 }
 705
 706 static void usb_device_class_init(ObjectClass *klass, void *data)
 707 {
 708     DeviceClass *k = DEVICE_CLASS(klass);
 709     k->bus_type = TYPE_USB_BUS;
 710     k->realize  = usb_qdev_realize;
 711     k->unrealize = usb_qdev_unrealize;
 712     k->props    = usb_props;
 713 }
 714
 715 static const TypeInfo usb_device_type_info = {
 716     .name = TYPE_USB_DEVICE,
 717     .parent = TYPE_DEVICE,
 718     .instance_size = sizeof(USBDevice),
 719     .abstract = true,
 720     .class_size = sizeof(USBDeviceClass),
 721     .class_init = usb_device_class_init,
 722 };
 723
 724 static void usb_register_types(void)
 725 {
 726     type_register_static(&usb_bus_info);
 727     type_register_static(&usb_device_type_info);
 728 }
 729
 730 type_init(usb_register_types)