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