hw/usb/bus.c

   1 #include "hw/hw.h"
   2 #include "hw/usb.h"
   3 #include "hw/qdev.h"
   4 #include "qemu/error-report.h"
   5 #include "sysemu/sysemu.h"
   6 #include "monitor/monitor.h"
   7 #include "trace.h"
   8
   9 static void usb_bus_dev_print(Monitor *mon, DeviceState *qdev, int indent);
  10
  11 static char *usb_get_dev_path(DeviceState *dev);
  12 static char *usb_get_fw_dev_path(DeviceState *qdev);
  13 static void usb_qdev_unrealize(DeviceState *qdev, Error **errp);
  14
  15 static Property usb_props[] = {
  16     DEFINE_PROP_STRING("port", USBDevice, port_path),
  17     DEFINE_PROP_STRING("serial", USBDevice, serial),
  18     DEFINE_PROP_BIT("full-path", USBDevice, flags,
  19                     USB_DEV_FLAG_FULL_PATH, true),
  20     DEFINE_PROP_BIT("msos-desc", USBDevice, flags,
  21                     USB_DEV_FLAG_MSOS_DESC_ENABLE, true),
  22     DEFINE_PROP_END_OF_LIST()
  23 };
  24
  25 static void usb_bus_class_init(ObjectClass *klass, void *data)
  26 {
  27     BusClass *k = BUS_CLASS(klass);
  28     HotplugHandlerClass *hc = HOTPLUG_HANDLER_CLASS(klass);
  29
  30     k->print_dev = usb_bus_dev_print;
  31     k->get_dev_path = usb_get_dev_path;
  32     k->get_fw_dev_path = usb_get_fw_dev_path;
  33     hc->unplug = qdev_simple_device_unplug_cb;
  34 }
  35
  36 static const TypeInfo usb_bus_info = {
  37     .name = TYPE_USB_BUS,
  38     .parent = TYPE_BUS,
  39     .instance_size = sizeof(USBBus),
  40     .class_init = usb_bus_class_init,
  41     .interfaces = (InterfaceInfo[]) {
  42         { TYPE_HOTPLUG_HANDLER },
  43         { }
  44     }
  45 };
  46
  47 static int next_usb_bus = 0;
  48 static QTAILQ_HEAD(, USBBus) busses = QTAILQ_HEAD_INITIALIZER(busses);
  49
  50 static int usb_device_post_load(void *opaque, int version_id)
  51 {
  52     USBDevice *dev = opaque;
  53
  54     if (dev->state == USB_STATE_NOTATTACHED) {
  55         dev->attached = 0;
  56     } else {
  57         dev->attached = 1;
  58     }
  59     if (dev->setup_index < 0 ||
  60         dev->setup_len < 0 ||
  61         dev->setup_index > dev->setup_len ||
  62         dev->setup_len > sizeof(dev->data_buf)) {
  63         return -EINVAL;
  64     }
  65     return 0;
  66 }
  67
  68 const VMStateDescription vmstate_usb_device = {
  69     .name = "USBDevice",
  70     .version_id = 1,
  71     .minimum_version_id = 1,
  72     .post_load = usb_device_post_load,
  73     .fields = (VMStateField[]) {
  74         VMSTATE_UINT8(addr, USBDevice),
  75         VMSTATE_INT32(state, USBDevice),
  76         VMSTATE_INT32(remote_wakeup, USBDevice),
  77         VMSTATE_INT32(setup_state, USBDevice),
  78         VMSTATE_INT32(setup_len, USBDevice),
  79         VMSTATE_INT32(setup_index, USBDevice),
  80         VMSTATE_UINT8_ARRAY(setup_buf, USBDevice, 8),
  81         VMSTATE_END_OF_LIST(),
  82     }
  83 };
  84
  85 void usb_bus_new(USBBus *bus, size_t bus_size,
  86                  USBBusOps *ops, DeviceState *host)
  87 {
  88     qbus_create_inplace(bus, bus_size, TYPE_USB_BUS, host, NULL);
  89     qbus_set_bus_hotplug_handler(BUS(bus), &error_abort);
  90     bus->ops = ops;
  91     bus->busnr = next_usb_bus++;
  92     QTAILQ_INIT(&bus->free);
  93     QTAILQ_INIT(&bus->used);
  94     QTAILQ_INSERT_TAIL(&busses, bus, next);
  95 }
  96
  97 void usb_bus_release(USBBus *bus)
  98 {
  99     assert(next_usb_bus > 0);
 100
 101     QTAILQ_REMOVE(&busses, bus, next);
 102 }
 103
 104 USBBus *usb_bus_find(int busnr)
 105 {
 106     USBBus *bus;
 107
 108     if (-1 == busnr)
 109         return QTAILQ_FIRST(&busses);
 110     QTAILQ_FOREACH(bus, &busses, next) {
 111         if (bus->busnr == busnr)
 112             return bus;
 113     }
 114     return NULL;
 115 }
 116
 117 static void usb_device_realize(USBDevice *dev, Error **errp)
 118 {
 119     USBDeviceClass *klass = USB_DEVICE_GET_CLASS(dev);
 120
 121     if (klass->realize) {
 122         klass->realize(dev, errp);
 123     }
 124 }
 125
 126 USBDevice *usb_device_find_device(USBDevice *dev, uint8_t addr)
 127 {
 128     USBDeviceClass *klass = USB_DEVICE_GET_CLASS(dev);
 129     if (klass->find_device) {
 130         return klass->find_device(dev, addr);
 131     }
 132     return NULL;
 133 }
 134
 135 static void usb_device_handle_destroy(USBDevice *dev)
 136 {
 137     USBDeviceClass *klass = USB_DEVICE_GET_CLASS(dev);
 138     if (klass->handle_destroy) {
 139         klass->handle_destroy(dev);
 140     }
 141 }
 142
 143 void usb_device_cancel_packet(USBDevice *dev, USBPacket *p)
 144 {
 145     USBDeviceClass *klass = USB_DEVICE_GET_CLASS(dev);
 146     if (klass->cancel_packet) {
 147         klass->cancel_packet(dev, p);
 148     }
 149 }
 150
 151 void usb_device_handle_attach(USBDevice *dev)
 152 {
 153     USBDeviceClass *klass = USB_DEVICE_GET_CLASS(dev);
 154     if (klass->handle_attach) {
 155         klass->handle_attach(dev);
 156     }
 157 }
 158
 159 void usb_device_handle_reset(USBDevice *dev)
 160 {
 161     USBDeviceClass *klass = USB_DEVICE_GET_CLASS(dev);
 162     if (klass->handle_reset) {
 163         klass->handle_reset(dev);
 164     }
 165 }
 166
 167 void usb_device_handle_control(USBDevice *dev, USBPacket *p, int request,
 168                                int value, int index, int length, uint8_t *data)
 169 {
 170     USBDeviceClass *klass = USB_DEVICE_GET_CLASS(dev);
 171     if (klass->handle_control) {
 172         klass->handle_control(dev, p, request, value, index, length, data);
 173     }
 174 }
 175
 176 void usb_device_handle_data(USBDevice *dev, USBPacket *p)
 177 {
 178     USBDeviceClass *klass = USB_DEVICE_GET_CLASS(dev);
 179     if (klass->handle_data) {
 180         klass->handle_data(dev, p);
 181     }
 182 }
 183
 184 const char *usb_device_get_product_desc(USBDevice *dev)
 185 {
 186     USBDeviceClass *klass = USB_DEVICE_GET_CLASS(dev);
 187     return klass->product_desc;
 188 }
 189
 190 const USBDesc *usb_device_get_usb_desc(USBDevice *dev)
 191 {
 192     USBDeviceClass *klass = USB_DEVICE_GET_CLASS(dev);
 193     if (dev->usb_desc) {
 194         return dev->usb_desc;
 195     }
 196     return klass->usb_desc;
 197 }
 198
 199 void usb_device_set_interface(USBDevice *dev, int interface,
 200                               int alt_old, int alt_new)
 201 {
 202     USBDeviceClass *klass = USB_DEVICE_GET_CLASS(dev);
 203     if (klass->set_interface) {
 204         klass->set_interface(dev, interface, alt_old, alt_new);
 205     }
 206 }
 207
 208 void usb_device_flush_ep_queue(USBDevice *dev, USBEndpoint *ep)
 209 {
 210     USBDeviceClass *klass = USB_DEVICE_GET_CLASS(dev);
 211     if (klass->flush_ep_queue) {
 212         klass->flush_ep_queue(dev, ep);
 213     }
 214 }
 215
 216 void usb_device_ep_stopped(USBDevice *dev, USBEndpoint *ep)
 217 {
 218     USBDeviceClass *klass = USB_DEVICE_GET_CLASS(dev);
 219     if (klass->ep_stopped) {
 220         klass->ep_stopped(dev, ep);
 221     }
 222 }
 223
 224 int usb_device_alloc_streams(USBDevice *dev, USBEndpoint **eps, int nr_eps,
 225                              int streams)
 226 {
 227     USBDeviceClass *klass = USB_DEVICE_GET_CLASS(dev);
 228     if (klass->alloc_streams) {
 229         return klass->alloc_streams(dev, eps, nr_eps, streams);
 230     }
 231     return 0;
 232 }
 233
 234 void usb_device_free_streams(USBDevice *dev, USBEndpoint **eps, int nr_eps)
 235 {
 236     USBDeviceClass *klass = USB_DEVICE_GET_CLASS(dev);
 237     if (klass->free_streams) {
 238         klass->free_streams(dev, eps, nr_eps);
 239     }
 240 }
 241
 242 static void usb_qdev_realize(DeviceState *qdev, Error **errp)
 243 {
 244     USBDevice *dev = USB_DEVICE(qdev);
 245     Error *local_err = NULL;
 246
 247     pstrcpy(dev->product_desc, sizeof(dev->product_desc),
 248             usb_device_get_product_desc(dev));
 249     dev->auto_attach = 1;
 250     QLIST_INIT(&dev->strings);
 251     usb_ep_init(dev);
 252
 253     usb_claim_port(dev, &local_err);
 254     if (local_err) {
 255         error_propagate(errp, local_err);
 256         return;
 257     }
 258
 259     usb_device_realize(dev, &local_err);
 260     if (local_err) {
 261         usb_release_port(dev);
 262         error_propagate(errp, local_err);
 263         return;
 264     }
 265
 266     if (dev->auto_attach) {
 267         usb_device_attach(dev, &local_err);
 268         if (local_err) {
 269             usb_qdev_unrealize(qdev, NULL);
 270             error_propagate(errp, local_err);
 271             return;
 272         }
 273     }
 274 }
 275
 276 static void usb_qdev_unrealize(DeviceState *qdev, Error **errp)
 277 {
 278     USBDevice *dev = USB_DEVICE(qdev);
 279
 280     if (dev->attached) {
 281         usb_device_detach(dev);
 282     }
 283     usb_device_handle_destroy(dev);
 284     if (dev->port) {
 285         usb_release_port(dev);
 286     }
 287 }
 288
 289 typedef struct LegacyUSBFactory
 290 {
 291     const char *name;
 292     const char *usbdevice_name;
 293     USBDevice *(*usbdevice_init)(USBBus *bus, const char *params);
 294 } LegacyUSBFactory;
 295
 296 static GSList *legacy_usb_factory;
 297
 298 void usb_legacy_register(const char *typename, const char *usbdevice_name,
 299                          USBDevice *(*usbdevice_init)(USBBus *bus,
 300                                                       const char *params))
 301 {
 302     if (usbdevice_name) {
 303         LegacyUSBFactory *f = g_malloc0(sizeof(*f));
 304         f->name = typename;
 305         f->usbdevice_name = usbdevice_name;
 306         f->usbdevice_init = usbdevice_init;
 307         legacy_usb_factory = g_slist_append(legacy_usb_factory, f);
 308     }
 309 }
 310
 311 USBDevice *usb_create(USBBus *bus, const char *name)
 312 {
 313     DeviceState *dev;
 314
 315     dev = qdev_create(&bus->qbus, name);
 316     return USB_DEVICE(dev);
 317 }
 318
 319 static USBDevice *usb_try_create_simple(USBBus *bus, const char *name,
 320                                         Error **errp)
 321 {
 322     Error *err = NULL;
 323     USBDevice *dev;
 324
 325     dev = USB_DEVICE(qdev_try_create(&bus->qbus, name));
 326     if (!dev) {
 327         error_setg(errp, "Failed to create USB device '%s'", name);
 328         return NULL;
 329     }
 330     object_property_set_bool(OBJECT(dev), true, "realized", &err);
 331     if (err) {
 332         error_setg(errp, "Failed to initialize USB device '%s': %s",
 333                    name, error_get_pretty(err));
 334         error_free(err);
 335         object_unparent(OBJECT(dev));
 336         return NULL;
 337     }
 338     return dev;
 339 }
 340
 341 USBDevice *usb_create_simple(USBBus *bus, const char *name)
 342 {
 343     return usb_try_create_simple(bus, name, &error_abort);
 344 }
 345
 346 static void usb_fill_port(USBPort *port, void *opaque, int index,
 347                           USBPortOps *ops, int speedmask)
 348 {
 349     port->opaque = opaque;
 350     port->index = index;
 351     port->ops = ops;
 352     port->speedmask = speedmask;
 353     usb_port_location(port, NULL, index + 1);
 354 }
 355
 356 void usb_register_port(USBBus *bus, USBPort *port, void *opaque, int index,
 357                        USBPortOps *ops, int speedmask)
 358 {
 359     usb_fill_port(port, opaque, index, ops, speedmask);
 360     QTAILQ_INSERT_TAIL(&bus->free, port, next);
 361     bus->nfree++;
 362 }
 363
 364 void usb_register_companion(const char *masterbus, USBPort *ports[],
 365                             uint32_t portcount, uint32_t firstport,
 366                             void *opaque, USBPortOps *ops, int speedmask,
 367                             Error **errp)
 368 {
 369     USBBus *bus;
 370     int i;
 371
 372     QTAILQ_FOREACH(bus, &busses, next) {
 373         if (strcmp(bus->qbus.name, masterbus) == 0) {
 374             break;
 375         }
 376     }
 377
 378     if (!bus) {
 379         error_setg(errp, "USB bus '%s' not found", masterbus);
 380         return;
 381     }
 382     if (!bus->ops->register_companion) {
 383         error_setg(errp, "Can't use USB bus '%s' as masterbus,"
 384                    " it doesn't support companion controllers",
 385                    masterbus);
 386         return;
 387     }
 388
 389     for (i = 0; i < portcount; i++) {
 390         usb_fill_port(ports[i], opaque, i, ops, speedmask);
 391     }
 392
 393     bus->ops->register_companion(bus, ports, portcount, firstport, errp);
 394 }
 395
 396 void usb_port_location(USBPort *downstream, USBPort *upstream, int portnr)
 397 {
 398     if (upstream) {
 399         snprintf(downstream->path, sizeof(downstream->path), "%s.%d",
 400                  upstream->path, portnr);
 401         downstream->hubcount = upstream->hubcount + 1;
 402     } else {
 403         snprintf(downstream->path, sizeof(downstream->path), "%d", portnr);
 404         downstream->hubcount = 0;
 405     }
 406 }
 407
 408 void usb_unregister_port(USBBus *bus, USBPort *port)
 409 {
 410     if (port->dev) {
 411         object_unparent(OBJECT(port->dev));
 412     }
 413     QTAILQ_REMOVE(&bus->free, port, next);
 414     bus->nfree--;
 415 }
 416
 417 void usb_claim_port(USBDevice *dev, Error **errp)
 418 {
 419     USBBus *bus = usb_bus_from_device(dev);
 420     USBPort *port;
 421
 422     assert(dev->port == NULL);
 423
 424     if (dev->port_path) {
 425         QTAILQ_FOREACH(port, &bus->free, next) {
 426             if (strcmp(port->path, dev->port_path) == 0) {
 427                 break;
 428             }
 429         }
 430         if (port == NULL) {
 431             error_setg(errp, "usb port %s (bus %s) not found (in use?)",
 432                        dev->port_path, bus->qbus.name);
 433             return;
 434         }
 435     } else {
 436         if (bus->nfree == 1 && strcmp(object_get_typename(OBJECT(dev)), "usb-hub") != 0) {
 437             /* Create a new hub and chain it on */
 438             usb_try_create_simple(bus, "usb-hub", NULL);
 439         }
 440         if (bus->nfree == 0) {
 441             error_setg(errp, "tried to attach usb device %s to a bus "
 442                        "with no free ports", dev->product_desc);
 443             return;
 444         }
 445         port = QTAILQ_FIRST(&bus->free);
 446     }
 447     trace_usb_port_claim(bus->busnr, port->path);
 448
 449     QTAILQ_REMOVE(&bus->free, port, next);
 450     bus->nfree--;
 451
 452     dev->port = port;
 453     port->dev = dev;
 454
 455     QTAILQ_INSERT_TAIL(&bus->used, port, next);
 456     bus->nused++;
 457 }
 458
 459 void usb_release_port(USBDevice *dev)
 460 {
 461     USBBus *bus = usb_bus_from_device(dev);
 462     USBPort *port = dev->port;
 463
 464     assert(port != NULL);
 465     trace_usb_port_release(bus->busnr, port->path);
 466
 467     QTAILQ_REMOVE(&bus->used, port, next);
 468     bus->nused--;
 469
 470     dev->port = NULL;
 471     port->dev = NULL;
 472
 473     QTAILQ_INSERT_TAIL(&bus->free, port, next);
 474     bus->nfree++;
 475 }
 476
 477 static void usb_mask_to_str(char *dest, size_t size,
 478                             unsigned int speedmask)
 479 {
 480     static const struct {
 481         unsigned int mask;
 482         const char *name;
 483     } speeds[] = {
 484         { .mask = USB_SPEED_MASK_FULL,  .name = "full"  },
 485         { .mask = USB_SPEED_MASK_HIGH,  .name = "high"  },
 486         { .mask = USB_SPEED_MASK_SUPER, .name = "super" },
 487     };
 488     int i, pos = 0;
 489
 490     for (i = 0; i < ARRAY_SIZE(speeds); i++) {
 491         if (speeds[i].mask & speedmask) {
 492             pos += snprintf(dest + pos, size - pos, "%s%s",
 493                             pos ? "+" : "",
 494                             speeds[i].name);
 495         }
 496     }
 497 }
 498
 499 void usb_check_attach(USBDevice *dev, Error **errp)
 500 {
 501     USBBus *bus = usb_bus_from_device(dev);
 502     USBPort *port = dev->port;
 503     char devspeed[32], portspeed[32];
 504
 505     assert(port != NULL);
 506     assert(!dev->attached);
 507     usb_mask_to_str(devspeed, sizeof(devspeed), dev->speedmask);
 508     usb_mask_to_str(portspeed, sizeof(portspeed), port->speedmask);
 509     trace_usb_port_attach(bus->busnr, port->path,
 510                           devspeed, portspeed);
 511
 512     if (!(port->speedmask & dev->speedmask)) {
 513         error_setg(errp, "Warning: speed mismatch trying to attach"
 514                    " usb device \"%s\" (%s speed)"
 515                    " to bus \"%s\", port \"%s\" (%s speed)",
 516                    dev->product_desc, devspeed,
 517                    bus->qbus.name, port->path, portspeed);
 518         return;
 519     }
 520 }
 521
 522 void usb_device_attach(USBDevice *dev, Error **errp)
 523 {
 524     USBPort *port = dev->port;
 525     Error *local_err = NULL;
 526
 527     usb_check_attach(dev, &local_err);
 528     if (local_err) {
 529         error_propagate(errp, local_err);
 530         return;
 531     }
 532
 533     dev->attached++;
 534     usb_attach(port);
 535 }
 536
 537 int usb_device_detach(USBDevice *dev)
 538 {
 539     USBBus *bus = usb_bus_from_device(dev);
 540     USBPort *port = dev->port;
 541
 542     assert(port != NULL);
 543     assert(dev->attached);
 544     trace_usb_port_detach(bus->busnr, port->path);
 545
 546     usb_detach(port);
 547     dev->attached--;
 548     return 0;
 549 }
 550
 551 int usb_device_delete_addr(int busnr, int addr)
 552 {
 553     USBBus *bus;
 554     USBPort *port;
 555     USBDevice *dev;
 556
 557     bus = usb_bus_find(busnr);
 558     if (!bus)
 559         return -1;
 560
 561     QTAILQ_FOREACH(port, &bus->used, next) {
 562         if (port->dev->addr == addr)
 563             break;
 564     }
 565     if (!port)
 566         return -1;
 567     dev = port->dev;
 568
 569     object_unparent(OBJECT(dev));
 570     return 0;
 571 }
 572
 573 static const char *usb_speed(unsigned int speed)
 574 {
 575     static const char *txt[] = {
 576         [ USB_SPEED_LOW  ] = "1.5",
 577         [ USB_SPEED_FULL ] = "12",
 578         [ USB_SPEED_HIGH ] = "480",
 579         [ USB_SPEED_SUPER ] = "5000",
 580     };
 581     if (speed >= ARRAY_SIZE(txt))
 582         return "?";
 583     return txt[speed];
 584 }
 585
 586 static void usb_bus_dev_print(Monitor *mon, DeviceState *qdev, int indent)
 587 {
 588     USBDevice *dev = USB_DEVICE(qdev);
 589     USBBus *bus = usb_bus_from_device(dev);
 590
 591     monitor_printf(mon, "%*saddr %d.%d, port %s, speed %s, name %s%s\n",
 592                    indent, "", bus->busnr, dev->addr,
 593                    dev->port ? dev->port->path : "-",
 594                    usb_speed(dev->speed), dev->product_desc,
 595                    dev->attached ? ", attached" : "");
 596 }
 597
 598 static char *usb_get_dev_path(DeviceState *qdev)
 599 {
 600     USBDevice *dev = USB_DEVICE(qdev);
 601     DeviceState *hcd = qdev->parent_bus->parent;
 602     char *id = NULL;
 603
 604     if (dev->flags & (1 << USB_DEV_FLAG_FULL_PATH)) {
 605         id = qdev_get_dev_path(hcd);
 606     }
 607     if (id) {
 608         char *ret = g_strdup_printf("%s/%s", id, dev->port->path);
 609         g_free(id);
 610         return ret;
 611     } else {
 612         return g_strdup(dev->port->path);
 613     }
 614 }
 615
 616 static char *usb_get_fw_dev_path(DeviceState *qdev)
 617 {
 618     USBDevice *dev = USB_DEVICE(qdev);
 619     char *fw_path, *in;
 620     ssize_t pos = 0, fw_len;
 621     long nr;
 622
 623     fw_len = 32 + strlen(dev->port->path) * 6;
 624     fw_path = g_malloc(fw_len);
 625     in = dev->port->path;
 626     while (fw_len - pos > 0) {
 627         nr = strtol(in, &in, 10);
 628         if (in[0] == '.') {
 629             /* some hub between root port and device */
 630             pos += snprintf(fw_path + pos, fw_len - pos, "hub@%lx/", nr);
 631             in++;
 632         } else {
 633             /* the device itself */
 634             pos += snprintf(fw_path + pos, fw_len - pos, "%s@%lx",
 635                             qdev_fw_name(qdev), nr);
 636             break;
 637         }
 638     }
 639     return fw_path;
 640 }
 641
 642 void hmp_info_usb(Monitor *mon, const QDict *qdict)
 643 {
 644     USBBus *bus;
 645     USBDevice *dev;
 646     USBPort *port;
 647
 648     if (QTAILQ_EMPTY(&busses)) {
 649         monitor_printf(mon, "USB support not enabled\n");
 650         return;
 651     }
 652
 653     QTAILQ_FOREACH(bus, &busses, next) {
 654         QTAILQ_FOREACH(port, &bus->used, next) {
 655             dev = port->dev;
 656             if (!dev)
 657                 continue;
 658             monitor_printf(mon, "  Device %d.%d, Port %s, Speed %s Mb/s, Product %s\n",
 659                            bus->busnr, dev->addr, port->path, usb_speed(dev->speed),
 660                            dev->product_desc);
 661         }
 662     }
 663 }
 664
 665 /* handle legacy -usbdevice cmd line option */
 666 USBDevice *usbdevice_create(const char *cmdline)
 667 {
 668     USBBus *bus = usb_bus_find(-1 /* any */);
 669     LegacyUSBFactory *f = NULL;
 670     Error *err = NULL;
 671     GSList *i;
 672     char driver[32];
 673     const char *params;
 674     int len;
 675     USBDevice *dev;
 676
 677     params = strchr(cmdline,':');
 678     if (params) {
 679         params++;
 680         len = params - cmdline;
 681         if (len > sizeof(driver))
 682             len = sizeof(driver);
 683         pstrcpy(driver, len, cmdline);
 684     } else {
 685         params = "";
 686         pstrcpy(driver, sizeof(driver), cmdline);
 687     }
 688
 689     for (i = legacy_usb_factory; i; i = i->next) {
 690         f = i->data;
 691         if (strcmp(f->usbdevice_name, driver) == 0) {
 692             break;
 693         }
 694     }
 695     if (i == NULL) {
 696 #if 0
 697         /* no error because some drivers are not converted (yet) */
 698         error_report("usbdevice %s not found", driver);
 699 #endif
 700         return NULL;
 701     }
 702
 703     if (!bus) {
 704         error_report("Error: no usb bus to attach usbdevice %s, "
 705                      "please try -machine usb=on and check that "
 706                      "the machine model supports USB", driver);
 707         return NULL;
 708     }
 709
 710     if (f->usbdevice_init) {
 711         dev = f->usbdevice_init(bus, params);
 712     } else {
 713         if (*params) {
 714             error_report("usbdevice %s accepts no params", driver);
 715             return NULL;
 716         }
 717         dev = usb_create(bus, f->name);
 718     }
 719     if (!dev) {
 720         error_report("Failed to create USB device '%s'", f->name);
 721         return NULL;
 722     }
 723     object_property_set_bool(OBJECT(dev), true, "realized", &err);
 724     if (err) {
 725         error_report("Failed to initialize USB device '%s': %s",
 726                      f->name, error_get_pretty(err));
 727         error_free(err);
 728         object_unparent(OBJECT(dev));
 729         return NULL;
 730     }
 731     return dev;
 732 }
 733
 734 static void usb_device_class_init(ObjectClass *klass, void *data)
 735 {
 736     DeviceClass *k = DEVICE_CLASS(klass);
 737     k->bus_type = TYPE_USB_BUS;
 738     k->realize  = usb_qdev_realize;
 739     k->unrealize = usb_qdev_unrealize;
 740     k->props    = usb_props;
 741 }
 742
 743 static const TypeInfo usb_device_type_info = {
 744     .name = TYPE_USB_DEVICE,
 745     .parent = TYPE_DEVICE,
 746     .instance_size = sizeof(USBDevice),
 747     .abstract = true,
 748     .class_size = sizeof(USBDeviceClass),
 749     .class_init = usb_device_class_init,
 750 };
 751
 752 static void usb_register_types(void)
 753 {
 754     type_register_static(&usb_bus_info);
 755     type_register_static(&usb_device_type_info);
 756 }
 757
 758 type_init(usb_register_types)