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 static USBDevice *usb_try_create_simple(USBBus *bus, const char *name,
 319                                         Error **errp)
 320 {
 321     Error *err = NULL;
 322     USBDevice *dev;
 323
 324     dev = USB_DEVICE(qdev_try_create(&bus->qbus, name));
 325     if (!dev) {
 326         error_setg(errp, "Failed to create USB device '%s'", name);
 327         return NULL;
 328     }
 329     object_property_set_bool(OBJECT(dev), true, "realized", &err);
 330     if (err) {
 331         error_setg(errp, "Failed to initialize USB device '%s': %s",
 332                    name, error_get_pretty(err));
 333         error_free(err);
 334         object_unparent(OBJECT(dev));
 335         return NULL;
 336     }
 337     return dev;
 338 }
 339
 340 USBDevice *usb_create_simple(USBBus *bus, const char *name)
 341 {
 342     return usb_try_create_simple(bus, name, &error_abort);
 343 }
 344
 345 static void usb_fill_port(USBPort *port, void *opaque, int index,
 346                           USBPortOps *ops, int speedmask)
 347 {
 348     port->opaque = opaque;
 349     port->index = index;
 350     port->ops = ops;
 351     port->speedmask = speedmask;
 352     usb_port_location(port, NULL, index + 1);
 353 }
 354
 355 void usb_register_port(USBBus *bus, USBPort *port, void *opaque, int index,
 356                        USBPortOps *ops, int speedmask)
 357 {
 358     usb_fill_port(port, opaque, index, ops, speedmask);
 359     QTAILQ_INSERT_TAIL(&bus->free, port, next);
 360     bus->nfree++;
 361 }
 362
 363 int usb_register_companion(const char *masterbus, USBPort *ports[],
 364                            uint32_t portcount, uint32_t firstport,
 365                            void *opaque, USBPortOps *ops, int speedmask)
 366 {
 367     USBBus *bus;
 368     int i;
 369
 370     QTAILQ_FOREACH(bus, &busses, next) {
 371         if (strcmp(bus->qbus.name, masterbus) == 0) {
 372             break;
 373         }
 374     }
 375
 376     if (!bus || !bus->ops->register_companion) {
 377         qerror_report(QERR_INVALID_PARAMETER_VALUE, "masterbus",
 378                       "an USB masterbus");
 379         if (bus) {
 380             error_printf_unless_qmp(
 381                 "USB bus '%s' does not allow companion controllers\n",
 382                 masterbus);
 383         }
 384         return -1;
 385     }
 386
 387     for (i = 0; i < portcount; i++) {
 388         usb_fill_port(ports[i], opaque, i, ops, speedmask);
 389     }
 390
 391     return bus->ops->register_companion(bus, ports, portcount, firstport);
 392 }
 393
 394 void usb_port_location(USBPort *downstream, USBPort *upstream, int portnr)
 395 {
 396     if (upstream) {
 397         snprintf(downstream->path, sizeof(downstream->path), "%s.%d",
 398                  upstream->path, portnr);
 399         downstream->hubcount = upstream->hubcount + 1;
 400     } else {
 401         snprintf(downstream->path, sizeof(downstream->path), "%d", portnr);
 402         downstream->hubcount = 0;
 403     }
 404 }
 405
 406 void usb_unregister_port(USBBus *bus, USBPort *port)
 407 {
 408     if (port->dev) {
 409         object_unparent(OBJECT(port->dev));
 410     }
 411     QTAILQ_REMOVE(&bus->free, port, next);
 412     bus->nfree--;
 413 }
 414
 415 void usb_claim_port(USBDevice *dev, Error **errp)
 416 {
 417     USBBus *bus = usb_bus_from_device(dev);
 418     USBPort *port;
 419
 420     assert(dev->port == NULL);
 421
 422     if (dev->port_path) {
 423         QTAILQ_FOREACH(port, &bus->free, next) {
 424             if (strcmp(port->path, dev->port_path) == 0) {
 425                 break;
 426             }
 427         }
 428         if (port == NULL) {
 429             error_setg(errp, "usb port %s (bus %s) not found (in use?)",
 430                        dev->port_path, bus->qbus.name);
 431             return;
 432         }
 433     } else {
 434         if (bus->nfree == 1 && strcmp(object_get_typename(OBJECT(dev)), "usb-hub") != 0) {
 435             /* Create a new hub and chain it on */
 436             usb_try_create_simple(bus, "usb-hub", NULL);
 437         }
 438         if (bus->nfree == 0) {
 439             error_setg(errp, "tried to attach usb device %s to a bus "
 440                        "with no free ports", dev->product_desc);
 441             return;
 442         }
 443         port = QTAILQ_FIRST(&bus->free);
 444     }
 445     trace_usb_port_claim(bus->busnr, port->path);
 446
 447     QTAILQ_REMOVE(&bus->free, port, next);
 448     bus->nfree--;
 449
 450     dev->port = port;
 451     port->dev = dev;
 452
 453     QTAILQ_INSERT_TAIL(&bus->used, port, next);
 454     bus->nused++;
 455 }
 456
 457 void usb_release_port(USBDevice *dev)
 458 {
 459     USBBus *bus = usb_bus_from_device(dev);
 460     USBPort *port = dev->port;
 461
 462     assert(port != NULL);
 463     trace_usb_port_release(bus->busnr, port->path);
 464
 465     QTAILQ_REMOVE(&bus->used, port, next);
 466     bus->nused--;
 467
 468     dev->port = NULL;
 469     port->dev = NULL;
 470
 471     QTAILQ_INSERT_TAIL(&bus->free, port, next);
 472     bus->nfree++;
 473 }
 474
 475 static void usb_mask_to_str(char *dest, size_t size,
 476                             unsigned int speedmask)
 477 {
 478     static const struct {
 479         unsigned int mask;
 480         const char *name;
 481     } speeds[] = {
 482         { .mask = USB_SPEED_MASK_FULL,  .name = "full"  },
 483         { .mask = USB_SPEED_MASK_HIGH,  .name = "high"  },
 484         { .mask = USB_SPEED_MASK_SUPER, .name = "super" },
 485     };
 486     int i, pos = 0;
 487
 488     for (i = 0; i < ARRAY_SIZE(speeds); i++) {
 489         if (speeds[i].mask & speedmask) {
 490             pos += snprintf(dest + pos, size - pos, "%s%s",
 491                             pos ? "+" : "",
 492                             speeds[i].name);
 493         }
 494     }
 495 }
 496
 497 void usb_check_attach(USBDevice *dev, Error **errp)
 498 {
 499     USBBus *bus = usb_bus_from_device(dev);
 500     USBPort *port = dev->port;
 501     char devspeed[32], portspeed[32];
 502
 503     assert(port != NULL);
 504     assert(!dev->attached);
 505     usb_mask_to_str(devspeed, sizeof(devspeed), dev->speedmask);
 506     usb_mask_to_str(portspeed, sizeof(portspeed), port->speedmask);
 507     trace_usb_port_attach(bus->busnr, port->path,
 508                           devspeed, portspeed);
 509
 510     if (!(port->speedmask & dev->speedmask)) {
 511         error_setg(errp, "Warning: speed mismatch trying to attach"
 512                    " usb device \"%s\" (%s speed)"
 513                    " to bus \"%s\", port \"%s\" (%s speed)",
 514                    dev->product_desc, devspeed,
 515                    bus->qbus.name, port->path, portspeed);
 516         return;
 517     }
 518 }
 519
 520 void usb_device_attach(USBDevice *dev, Error **errp)
 521 {
 522     USBPort *port = dev->port;
 523     Error *local_err = NULL;
 524
 525     usb_check_attach(dev, &local_err);
 526     if (local_err) {
 527         error_propagate(errp, local_err);
 528         return;
 529     }
 530
 531     dev->attached++;
 532     usb_attach(port);
 533 }
 534
 535 int usb_device_detach(USBDevice *dev)
 536 {
 537     USBBus *bus = usb_bus_from_device(dev);
 538     USBPort *port = dev->port;
 539
 540     assert(port != NULL);
 541     assert(dev->attached);
 542     trace_usb_port_detach(bus->busnr, port->path);
 543
 544     usb_detach(port);
 545     dev->attached--;
 546     return 0;
 547 }
 548
 549 int usb_device_delete_addr(int busnr, int addr)
 550 {
 551     USBBus *bus;
 552     USBPort *port;
 553     USBDevice *dev;
 554
 555     bus = usb_bus_find(busnr);
 556     if (!bus)
 557         return -1;
 558
 559     QTAILQ_FOREACH(port, &bus->used, next) {
 560         if (port->dev->addr == addr)
 561             break;
 562     }
 563     if (!port)
 564         return -1;
 565     dev = port->dev;
 566
 567     object_unparent(OBJECT(dev));
 568     return 0;
 569 }
 570
 571 static const char *usb_speed(unsigned int speed)
 572 {
 573     static const char *txt[] = {
 574         [ USB_SPEED_LOW  ] = "1.5",
 575         [ USB_SPEED_FULL ] = "12",
 576         [ USB_SPEED_HIGH ] = "480",
 577         [ USB_SPEED_SUPER ] = "5000",
 578     };
 579     if (speed >= ARRAY_SIZE(txt))
 580         return "?";
 581     return txt[speed];
 582 }
 583
 584 static void usb_bus_dev_print(Monitor *mon, DeviceState *qdev, int indent)
 585 {
 586     USBDevice *dev = USB_DEVICE(qdev);
 587     USBBus *bus = usb_bus_from_device(dev);
 588
 589     monitor_printf(mon, "%*saddr %d.%d, port %s, speed %s, name %s%s\n",
 590                    indent, "", bus->busnr, dev->addr,
 591                    dev->port ? dev->port->path : "-",
 592                    usb_speed(dev->speed), dev->product_desc,
 593                    dev->attached ? ", attached" : "");
 594 }
 595
 596 static char *usb_get_dev_path(DeviceState *qdev)
 597 {
 598     USBDevice *dev = USB_DEVICE(qdev);
 599     DeviceState *hcd = qdev->parent_bus->parent;
 600     char *id = NULL;
 601
 602     if (dev->flags & (1 << USB_DEV_FLAG_FULL_PATH)) {
 603         id = qdev_get_dev_path(hcd);
 604     }
 605     if (id) {
 606         char *ret = g_strdup_printf("%s/%s", id, dev->port->path);
 607         g_free(id);
 608         return ret;
 609     } else {
 610         return g_strdup(dev->port->path);
 611     }
 612 }
 613
 614 static char *usb_get_fw_dev_path(DeviceState *qdev)
 615 {
 616     USBDevice *dev = USB_DEVICE(qdev);
 617     char *fw_path, *in;
 618     ssize_t pos = 0, fw_len;
 619     long nr;
 620
 621     fw_len = 32 + strlen(dev->port->path) * 6;
 622     fw_path = g_malloc(fw_len);
 623     in = dev->port->path;
 624     while (fw_len - pos > 0) {
 625         nr = strtol(in, &in, 10);
 626         if (in[0] == '.') {
 627             /* some hub between root port and device */
 628             pos += snprintf(fw_path + pos, fw_len - pos, "hub@%lx/", nr);
 629             in++;
 630         } else {
 631             /* the device itself */
 632             pos += snprintf(fw_path + pos, fw_len - pos, "%s@%lx",
 633                             qdev_fw_name(qdev), nr);
 634             break;
 635         }
 636     }
 637     return fw_path;
 638 }
 639
 640 void hmp_info_usb(Monitor *mon, const QDict *qdict)
 641 {
 642     USBBus *bus;
 643     USBDevice *dev;
 644     USBPort *port;
 645
 646     if (QTAILQ_EMPTY(&busses)) {
 647         monitor_printf(mon, "USB support not enabled\n");
 648         return;
 649     }
 650
 651     QTAILQ_FOREACH(bus, &busses, next) {
 652         QTAILQ_FOREACH(port, &bus->used, next) {
 653             dev = port->dev;
 654             if (!dev)
 655                 continue;
 656             monitor_printf(mon, "  Device %d.%d, Port %s, Speed %s Mb/s, Product %s\n",
 657                            bus->busnr, dev->addr, port->path, usb_speed(dev->speed),
 658                            dev->product_desc);
 659         }
 660     }
 661 }
 662
 663 /* handle legacy -usbdevice cmd line option */
 664 USBDevice *usbdevice_create(const char *cmdline)
 665 {
 666     USBBus *bus = usb_bus_find(-1 /* any */);
 667     LegacyUSBFactory *f = NULL;
 668     Error *err = NULL;
 669     GSList *i;
 670     char driver[32];
 671     const char *params;
 672     int len;
 673     USBDevice *dev;
 674
 675     params = strchr(cmdline,':');
 676     if (params) {
 677         params++;
 678         len = params - cmdline;
 679         if (len > sizeof(driver))
 680             len = sizeof(driver);
 681         pstrcpy(driver, len, cmdline);
 682     } else {
 683         params = "";
 684         pstrcpy(driver, sizeof(driver), cmdline);
 685     }
 686
 687     for (i = legacy_usb_factory; i; i = i->next) {
 688         f = i->data;
 689         if (strcmp(f->usbdevice_name, driver) == 0) {
 690             break;
 691         }
 692     }
 693     if (i == NULL) {
 694 #if 0
 695         /* no error because some drivers are not converted (yet) */
 696         error_report("usbdevice %s not found", driver);
 697 #endif
 698         return NULL;
 699     }
 700
 701     if (!bus) {
 702         error_report("Error: no usb bus to attach usbdevice %s, "
 703                      "please try -machine usb=on and check that "
 704                      "the machine model supports USB", driver);
 705         return NULL;
 706     }
 707
 708     if (f->usbdevice_init) {
 709         dev = f->usbdevice_init(bus, params);
 710     } else {
 711         if (*params) {
 712             error_report("usbdevice %s accepts no params", driver);
 713             return NULL;
 714         }
 715         dev = usb_create(bus, f->name);
 716     }
 717     if (!dev) {
 718         error_report("Failed to create USB device '%s'", f->name);
 719         return NULL;
 720     }
 721     object_property_set_bool(OBJECT(dev), true, "realized", &err);
 722     if (err) {
 723         error_report("Failed to initialize USB device '%s': %s",
 724                      f->name, error_get_pretty(err));
 725         error_free(err);
 726         object_unparent(OBJECT(dev));
 727         return NULL;
 728     }
 729     return dev;
 730 }
 731
 732 static void usb_device_class_init(ObjectClass *klass, void *data)
 733 {
 734     DeviceClass *k = DEVICE_CLASS(klass);
 735     k->bus_type = TYPE_USB_BUS;
 736     k->realize  = usb_qdev_realize;
 737     k->unrealize = usb_qdev_unrealize;
 738     k->props    = usb_props;
 739 }
 740
 741 static const TypeInfo usb_device_type_info = {
 742     .name = TYPE_USB_DEVICE,
 743     .parent = TYPE_DEVICE,
 744     .instance_size = sizeof(USBDevice),
 745     .abstract = true,
 746     .class_size = sizeof(USBDeviceClass),
 747     .class_init = usb_device_class_init,
 748 };
 749
 750 static void usb_register_types(void)
 751 {
 752     type_register_static(&usb_bus_info);
 753     type_register_static(&usb_device_type_info);
 754 }
 755
 756 type_init(usb_register_types)