hw/usb/bus.c

   1 #include "qemu/osdep.h"
   2 #include "hw/qdev-properties.h"
   3 #include "hw/usb.h"
   4 #include "qapi/error.h"
   5 #include "qemu/error-report.h"
   6 #include "qemu/module.h"
   7 #include "sysemu/sysemu.h"
   8 #include "migration/vmstate.h"
   9 #include "monitor/monitor.h"
  10 #include "trace.h"
  11 #include "qemu/cutils.h"
  12
  13 static void usb_bus_dev_print(Monitor *mon, DeviceState *qdev, int indent);
  14
  15 static char *usb_get_dev_path(DeviceState *dev);
  16 static char *usb_get_fw_dev_path(DeviceState *qdev);
  17 static void usb_qdev_unrealize(DeviceState *qdev, Error **errp);
  18
  19 static Property usb_props[] = {
  20     DEFINE_PROP_STRING("port", USBDevice, port_path),
  21     DEFINE_PROP_STRING("serial", USBDevice, serial),
  22     DEFINE_PROP_BIT("full-path", USBDevice, flags,
  23                     USB_DEV_FLAG_FULL_PATH, true),
  24     DEFINE_PROP_BIT("msos-desc", USBDevice, flags,
  25                     USB_DEV_FLAG_MSOS_DESC_ENABLE, true),
  26     DEFINE_PROP_END_OF_LIST()
  27 };
  28
  29 static void usb_bus_class_init(ObjectClass *klass, void *data)
  30 {
  31     BusClass *k = BUS_CLASS(klass);
  32     HotplugHandlerClass *hc = HOTPLUG_HANDLER_CLASS(klass);
  33
  34     k->print_dev = usb_bus_dev_print;
  35     k->get_dev_path = usb_get_dev_path;
  36     k->get_fw_dev_path = usb_get_fw_dev_path;
  37     hc->unplug = qdev_simple_device_unplug_cb;
  38 }
  39
  40 static const TypeInfo usb_bus_info = {
  41     .name = TYPE_USB_BUS,
  42     .parent = TYPE_BUS,
  43     .instance_size = sizeof(USBBus),
  44     .class_init = usb_bus_class_init,
  45     .interfaces = (InterfaceInfo[]) {
  46         { TYPE_HOTPLUG_HANDLER },
  47         { }
  48     }
  49 };
  50
  51 static int next_usb_bus = 0;
  52 static QTAILQ_HEAD(, USBBus) busses = QTAILQ_HEAD_INITIALIZER(busses);
  53
  54 static int usb_device_post_load(void *opaque, int version_id)
  55 {
  56     USBDevice *dev = opaque;
  57
  58     if (dev->state == USB_STATE_NOTATTACHED) {
  59         dev->attached = false;
  60     } else {
  61         dev->attached = true;
  62     }
  63     return 0;
  64 }
  65
  66 const VMStateDescription vmstate_usb_device = {
  67     .name = "USBDevice",
  68     .version_id = 1,
  69     .minimum_version_id = 1,
  70     .post_load = usb_device_post_load,
  71     .fields = (VMStateField[]) {
  72         VMSTATE_UINT8(addr, USBDevice),
  73         VMSTATE_INT32(state, USBDevice),
  74         VMSTATE_INT32(remote_wakeup, USBDevice),
  75         VMSTATE_INT32(setup_state, USBDevice),
  76         VMSTATE_INT32(setup_len, USBDevice),
  77         VMSTATE_INT32(setup_index, USBDevice),
  78         VMSTATE_UINT8_ARRAY(setup_buf, USBDevice, 8),
  79         VMSTATE_END_OF_LIST(),
  80     }
  81 };
  82
  83 void usb_bus_new(USBBus *bus, size_t bus_size,
  84                  USBBusOps *ops, DeviceState *host)
  85 {
  86     qbus_create_inplace(bus, bus_size, TYPE_USB_BUS, host, NULL);
  87     qbus_set_bus_hotplug_handler(BUS(bus), &error_abort);
  88     bus->ops = ops;
  89     bus->busnr = next_usb_bus++;
  90     QTAILQ_INIT(&bus->free);
  91     QTAILQ_INIT(&bus->used);
  92     QTAILQ_INSERT_TAIL(&busses, bus, next);
  93 }
  94
  95 void usb_bus_release(USBBus *bus)
  96 {
  97     assert(next_usb_bus > 0);
  98
  99     QTAILQ_REMOVE(&busses, bus, next);
 100 }
 101
 102 USBBus *usb_bus_find(int busnr)
 103 {
 104     USBBus *bus;
 105
 106     if (-1 == busnr)
 107         return QTAILQ_FIRST(&busses);
 108     QTAILQ_FOREACH(bus, &busses, next) {
 109         if (bus->busnr == busnr)
 110             return bus;
 111     }
 112     return NULL;
 113 }
 114
 115 static void usb_device_realize(USBDevice *dev, Error **errp)
 116 {
 117     USBDeviceClass *klass = USB_DEVICE_GET_CLASS(dev);
 118
 119     if (klass->realize) {
 120         klass->realize(dev, errp);
 121     }
 122 }
 123
 124 USBDevice *usb_device_find_device(USBDevice *dev, uint8_t addr)
 125 {
 126     USBDeviceClass *klass = USB_DEVICE_GET_CLASS(dev);
 127     if (klass->find_device) {
 128         return klass->find_device(dev, addr);
 129     }
 130     return NULL;
 131 }
 132
 133 static void usb_device_unrealize(USBDevice *dev, Error **errp)
 134 {
 135     USBDeviceClass *klass = USB_DEVICE_GET_CLASS(dev);
 136
 137     if (klass->unrealize) {
 138         klass->unrealize(dev, errp);
 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     USBDescString *s, *next;
 279
 280     QLIST_FOREACH_SAFE(s, &dev->strings, next, next) {
 281         QLIST_REMOVE(s, next);
 282         g_free(s->str);
 283         g_free(s);
 284     }
 285
 286     if (dev->attached) {
 287         usb_device_detach(dev);
 288     }
 289     usb_device_unrealize(dev, errp);
 290     if (dev->port) {
 291         usb_release_port(dev);
 292     }
 293 }
 294
 295 typedef struct LegacyUSBFactory
 296 {
 297     const char *name;
 298     const char *usbdevice_name;
 299     USBDevice *(*usbdevice_init)(USBBus *bus, const char *params);
 300 } LegacyUSBFactory;
 301
 302 static GSList *legacy_usb_factory;
 303
 304 void usb_legacy_register(const char *typename, const char *usbdevice_name,
 305                          USBDevice *(*usbdevice_init)(USBBus *bus,
 306                                                       const char *params))
 307 {
 308     if (usbdevice_name) {
 309         LegacyUSBFactory *f = g_malloc0(sizeof(*f));
 310         f->name = typename;
 311         f->usbdevice_name = usbdevice_name;
 312         f->usbdevice_init = usbdevice_init;
 313         legacy_usb_factory = g_slist_append(legacy_usb_factory, f);
 314     }
 315 }
 316
 317 USBDevice *usb_create(USBBus *bus, const char *name)
 318 {
 319     DeviceState *dev;
 320
 321     dev = qdev_create(&bus->qbus, name);
 322     return USB_DEVICE(dev);
 323 }
 324
 325 static USBDevice *usb_try_create_simple(USBBus *bus, const char *name,
 326                                         Error **errp)
 327 {
 328     Error *err = NULL;
 329     USBDevice *dev;
 330
 331     dev = USB_DEVICE(qdev_try_create(&bus->qbus, name));
 332     if (!dev) {
 333         error_setg(errp, "Failed to create USB device '%s'", name);
 334         return NULL;
 335     }
 336     object_property_set_bool(OBJECT(dev), true, "realized", &err);
 337     if (err) {
 338         error_propagate_prepend(errp, err,
 339                                 "Failed to initialize USB device '%s': ",
 340                                 name);
 341         return NULL;
 342     }
 343     return dev;
 344 }
 345
 346 USBDevice *usb_create_simple(USBBus *bus, const char *name)
 347 {
 348     return usb_try_create_simple(bus, name, &error_abort);
 349 }
 350
 351 static void usb_fill_port(USBPort *port, void *opaque, int index,
 352                           USBPortOps *ops, int speedmask)
 353 {
 354     port->opaque = opaque;
 355     port->index = index;
 356     port->ops = ops;
 357     port->speedmask = speedmask;
 358     usb_port_location(port, NULL, index + 1);
 359 }
 360
 361 void usb_register_port(USBBus *bus, USBPort *port, void *opaque, int index,
 362                        USBPortOps *ops, int speedmask)
 363 {
 364     usb_fill_port(port, opaque, index, ops, speedmask);
 365     QTAILQ_INSERT_TAIL(&bus->free, port, next);
 366     bus->nfree++;
 367 }
 368
 369 void usb_register_companion(const char *masterbus, USBPort *ports[],
 370                             uint32_t portcount, uint32_t firstport,
 371                             void *opaque, USBPortOps *ops, int speedmask,
 372                             Error **errp)
 373 {
 374     USBBus *bus;
 375     int i;
 376
 377     QTAILQ_FOREACH(bus, &busses, next) {
 378         if (strcmp(bus->qbus.name, masterbus) == 0) {
 379             break;
 380         }
 381     }
 382
 383     if (!bus) {
 384         error_setg(errp, "USB bus '%s' not found", masterbus);
 385         return;
 386     }
 387     if (!bus->ops->register_companion) {
 388         error_setg(errp, "Can't use USB bus '%s' as masterbus,"
 389                    " it doesn't support companion controllers",
 390                    masterbus);
 391         return;
 392     }
 393
 394     for (i = 0; i < portcount; i++) {
 395         usb_fill_port(ports[i], opaque, i, ops, speedmask);
 396     }
 397
 398     bus->ops->register_companion(bus, ports, portcount, firstport, errp);
 399 }
 400
 401 void usb_port_location(USBPort *downstream, USBPort *upstream, int portnr)
 402 {
 403     if (upstream) {
 404         int l = snprintf(downstream->path, sizeof(downstream->path), "%s.%d",
 405                          upstream->path, portnr);
 406         /* Max string is nn.nn.nn.nn.nn, which fits in 16 bytes */
 407         assert(l < sizeof(downstream->path));
 408         downstream->hubcount = upstream->hubcount + 1;
 409     } else {
 410         snprintf(downstream->path, sizeof(downstream->path), "%d", portnr);
 411         downstream->hubcount = 0;
 412     }
 413 }
 414
 415 void usb_unregister_port(USBBus *bus, USBPort *port)
 416 {
 417     if (port->dev) {
 418         object_unparent(OBJECT(port->dev));
 419     }
 420     QTAILQ_REMOVE(&bus->free, port, next);
 421     bus->nfree--;
 422 }
 423
 424 void usb_claim_port(USBDevice *dev, Error **errp)
 425 {
 426     USBBus *bus = usb_bus_from_device(dev);
 427     USBPort *port;
 428
 429     assert(dev->port == NULL);
 430
 431     if (dev->port_path) {
 432         QTAILQ_FOREACH(port, &bus->free, next) {
 433             if (strcmp(port->path, dev->port_path) == 0) {
 434                 break;
 435             }
 436         }
 437         if (port == NULL) {
 438             error_setg(errp, "usb port %s (bus %s) not found (in use?)",
 439                        dev->port_path, bus->qbus.name);
 440             return;
 441         }
 442     } else {
 443         if (bus->nfree == 1 && strcmp(object_get_typename(OBJECT(dev)), "usb-hub") != 0) {
 444             /* Create a new hub and chain it on */
 445             usb_try_create_simple(bus, "usb-hub", NULL);
 446         }
 447         if (bus->nfree == 0) {
 448             error_setg(errp, "tried to attach usb device %s to a bus "
 449                        "with no free ports", dev->product_desc);
 450             return;
 451         }
 452         port = QTAILQ_FIRST(&bus->free);
 453     }
 454     trace_usb_port_claim(bus->busnr, port->path);
 455
 456     QTAILQ_REMOVE(&bus->free, port, next);
 457     bus->nfree--;
 458
 459     dev->port = port;
 460     port->dev = dev;
 461
 462     QTAILQ_INSERT_TAIL(&bus->used, port, next);
 463     bus->nused++;
 464 }
 465
 466 void usb_release_port(USBDevice *dev)
 467 {
 468     USBBus *bus = usb_bus_from_device(dev);
 469     USBPort *port = dev->port;
 470
 471     assert(port != NULL);
 472     trace_usb_port_release(bus->busnr, port->path);
 473
 474     QTAILQ_REMOVE(&bus->used, port, next);
 475     bus->nused--;
 476
 477     dev->port = NULL;
 478     port->dev = NULL;
 479
 480     QTAILQ_INSERT_TAIL(&bus->free, port, next);
 481     bus->nfree++;
 482 }
 483
 484 static void usb_mask_to_str(char *dest, size_t size,
 485                             unsigned int speedmask)
 486 {
 487     static const struct {
 488         unsigned int mask;
 489         const char *name;
 490     } speeds[] = {
 491         { .mask = USB_SPEED_MASK_FULL,  .name = "full"  },
 492         { .mask = USB_SPEED_MASK_HIGH,  .name = "high"  },
 493         { .mask = USB_SPEED_MASK_SUPER, .name = "super" },
 494     };
 495     int i, pos = 0;
 496
 497     for (i = 0; i < ARRAY_SIZE(speeds); i++) {
 498         if (speeds[i].mask & speedmask) {
 499             pos += snprintf(dest + pos, size - pos, "%s%s",
 500                             pos ? "+" : "",
 501                             speeds[i].name);
 502         }
 503     }
 504
 505     if (pos == 0) {
 506         snprintf(dest, size, "unknown");
 507     }
 508 }
 509
 510 void usb_check_attach(USBDevice *dev, Error **errp)
 511 {
 512     USBBus *bus = usb_bus_from_device(dev);
 513     USBPort *port = dev->port;
 514     char devspeed[32], portspeed[32];
 515
 516     assert(port != NULL);
 517     assert(!dev->attached);
 518     usb_mask_to_str(devspeed, sizeof(devspeed), dev->speedmask);
 519     usb_mask_to_str(portspeed, sizeof(portspeed), port->speedmask);
 520     trace_usb_port_attach(bus->busnr, port->path,
 521                           devspeed, portspeed);
 522
 523     if (!(port->speedmask & dev->speedmask)) {
 524         error_setg(errp, "Warning: speed mismatch trying to attach"
 525                    " usb device \"%s\" (%s speed)"
 526                    " to bus \"%s\", port \"%s\" (%s speed)",
 527                    dev->product_desc, devspeed,
 528                    bus->qbus.name, port->path, portspeed);
 529         return;
 530     }
 531 }
 532
 533 void usb_device_attach(USBDevice *dev, Error **errp)
 534 {
 535     USBPort *port = dev->port;
 536     Error *local_err = NULL;
 537
 538     usb_check_attach(dev, &local_err);
 539     if (local_err) {
 540         error_propagate(errp, local_err);
 541         return;
 542     }
 543
 544     dev->attached = true;
 545     usb_attach(port);
 546 }
 547
 548 int usb_device_detach(USBDevice *dev)
 549 {
 550     USBBus *bus = usb_bus_from_device(dev);
 551     USBPort *port = dev->port;
 552
 553     assert(port != NULL);
 554     assert(dev->attached);
 555     trace_usb_port_detach(bus->busnr, port->path);
 556
 557     usb_detach(port);
 558     dev->attached = false;
 559     return 0;
 560 }
 561
 562 static const char *usb_speed(unsigned int speed)
 563 {
 564     static const char *txt[] = {
 565         [ USB_SPEED_LOW  ] = "1.5",
 566         [ USB_SPEED_FULL ] = "12",
 567         [ USB_SPEED_HIGH ] = "480",
 568         [ USB_SPEED_SUPER ] = "5000",
 569     };
 570     if (speed >= ARRAY_SIZE(txt))
 571         return "?";
 572     return txt[speed];
 573 }
 574
 575 static void usb_bus_dev_print(Monitor *mon, DeviceState *qdev, int indent)
 576 {
 577     USBDevice *dev = USB_DEVICE(qdev);
 578     USBBus *bus = usb_bus_from_device(dev);
 579
 580     monitor_printf(mon, "%*saddr %d.%d, port %s, speed %s, name %s%s\n",
 581                    indent, "", bus->busnr, dev->addr,
 582                    dev->port ? dev->port->path : "-",
 583                    usb_speed(dev->speed), dev->product_desc,
 584                    dev->attached ? ", attached" : "");
 585 }
 586
 587 static char *usb_get_dev_path(DeviceState *qdev)
 588 {
 589     USBDevice *dev = USB_DEVICE(qdev);
 590     DeviceState *hcd = qdev->parent_bus->parent;
 591     char *id = NULL;
 592
 593     if (dev->flags & (1 << USB_DEV_FLAG_FULL_PATH)) {
 594         id = qdev_get_dev_path(hcd);
 595     }
 596     if (id) {
 597         char *ret = g_strdup_printf("%s/%s", id, dev->port->path);
 598         g_free(id);
 599         return ret;
 600     } else {
 601         return g_strdup(dev->port->path);
 602     }
 603 }
 604
 605 static char *usb_get_fw_dev_path(DeviceState *qdev)
 606 {
 607     USBDevice *dev = USB_DEVICE(qdev);
 608     char *fw_path, *in;
 609     ssize_t pos = 0, fw_len;
 610     long nr;
 611
 612     fw_len = 32 + strlen(dev->port->path) * 6;
 613     fw_path = g_malloc(fw_len);
 614     in = dev->port->path;
 615     while (fw_len - pos > 0) {
 616         nr = strtol(in, &in, 10);
 617         if (in[0] == '.') {
 618             /* some hub between root port and device */
 619             pos += snprintf(fw_path + pos, fw_len - pos, "hub@%lx/", nr);
 620             in++;
 621         } else {
 622             /* the device itself */
 623             pos += snprintf(fw_path + pos, fw_len - pos, "%s@%lx",
 624                             qdev_fw_name(qdev), nr);
 625             break;
 626         }
 627     }
 628     return fw_path;
 629 }
 630
 631 void hmp_info_usb(Monitor *mon, const QDict *qdict)
 632 {
 633     USBBus *bus;
 634     USBDevice *dev;
 635     USBPort *port;
 636
 637     if (QTAILQ_EMPTY(&busses)) {
 638         monitor_printf(mon, "USB support not enabled\n");
 639         return;
 640     }
 641
 642     QTAILQ_FOREACH(bus, &busses, next) {
 643         QTAILQ_FOREACH(port, &bus->used, next) {
 644             dev = port->dev;
 645             if (!dev)
 646                 continue;
 647             monitor_printf(mon, "  Device %d.%d, Port %s, Speed %s Mb/s, "
 648                            "Product %s%s%s\n",
 649                            bus->busnr, dev->addr, port->path,
 650                            usb_speed(dev->speed), dev->product_desc,
 651                            dev->qdev.id ? ", ID: " : "",
 652                            dev->qdev.id ?: "");
 653         }
 654     }
 655 }
 656
 657 /* handle legacy -usbdevice cmd line option */
 658 USBDevice *usbdevice_create(const char *cmdline)
 659 {
 660     USBBus *bus = usb_bus_find(-1 /* any */);
 661     LegacyUSBFactory *f = NULL;
 662     Error *err = NULL;
 663     GSList *i;
 664     char driver[32];
 665     const char *params;
 666     int len;
 667     USBDevice *dev;
 668
 669     params = strchr(cmdline,':');
 670     if (params) {
 671         params++;
 672         len = params - cmdline;
 673         if (len > sizeof(driver))
 674             len = sizeof(driver);
 675         pstrcpy(driver, len, cmdline);
 676     } else {
 677         params = "";
 678         pstrcpy(driver, sizeof(driver), cmdline);
 679     }
 680
 681     for (i = legacy_usb_factory; i; i = i->next) {
 682         f = i->data;
 683         if (strcmp(f->usbdevice_name, driver) == 0) {
 684             break;
 685         }
 686     }
 687     if (i == NULL) {
 688 #if 0
 689         /* no error because some drivers are not converted (yet) */
 690         error_report("usbdevice %s not found", driver);
 691 #endif
 692         return NULL;
 693     }
 694
 695     if (!bus) {
 696         error_report("Error: no usb bus to attach usbdevice %s, "
 697                      "please try -machine usb=on and check that "
 698                      "the machine model supports USB", driver);
 699         return NULL;
 700     }
 701
 702     if (f->usbdevice_init) {
 703         dev = f->usbdevice_init(bus, params);
 704     } else {
 705         if (*params) {
 706             error_report("usbdevice %s accepts no params", driver);
 707             return NULL;
 708         }
 709         dev = usb_create(bus, f->name);
 710     }
 711     if (!dev) {
 712         error_report("Failed to create USB device '%s'", f->name);
 713         return NULL;
 714     }
 715     object_property_set_bool(OBJECT(dev), true, "realized", &err);
 716     if (err) {
 717         error_reportf_err(err, "Failed to initialize USB device '%s': ",
 718                           f->name);
 719         object_unparent(OBJECT(dev));
 720         return NULL;
 721     }
 722     return dev;
 723 }
 724
 725 static bool usb_get_attached(Object *obj, Error **errp)
 726 {
 727     USBDevice *dev = USB_DEVICE(obj);
 728
 729     return dev->attached;
 730 }
 731
 732 static void usb_set_attached(Object *obj, bool value, Error **errp)
 733 {
 734     USBDevice *dev = USB_DEVICE(obj);
 735     Error *err = NULL;
 736
 737     if (dev->attached == value) {
 738         return;
 739     }
 740
 741     if (value) {
 742         usb_device_attach(dev, &err);
 743         error_propagate(errp, err);
 744     } else {
 745         usb_device_detach(dev);
 746     }
 747 }
 748
 749 static void usb_device_instance_init(Object *obj)
 750 {
 751     USBDevice *dev = USB_DEVICE(obj);
 752     USBDeviceClass *klass = USB_DEVICE_GET_CLASS(dev);
 753
 754     if (klass->attached_settable) {
 755         object_property_add_bool(obj, "attached",
 756                                  usb_get_attached, usb_set_attached,
 757                                  NULL);
 758     } else {
 759         object_property_add_bool(obj, "attached",
 760                                  usb_get_attached, NULL,
 761                                  NULL);
 762     }
 763 }
 764
 765 static void usb_device_class_init(ObjectClass *klass, void *data)
 766 {
 767     DeviceClass *k = DEVICE_CLASS(klass);
 768     k->bus_type = TYPE_USB_BUS;
 769     k->realize  = usb_qdev_realize;
 770     k->unrealize = usb_qdev_unrealize;
 771     device_class_set_props(k, usb_props);
 772 }
 773
 774 static const TypeInfo usb_device_type_info = {
 775     .name = TYPE_USB_DEVICE,
 776     .parent = TYPE_DEVICE,
 777     .instance_size = sizeof(USBDevice),
 778     .instance_init = usb_device_instance_init,
 779     .abstract = true,
 780     .class_size = sizeof(USBDeviceClass),
 781     .class_init = usb_device_class_init,
 782 };
 783
 784 static void usb_register_types(void)
 785 {
 786     type_register_static(&usb_bus_info);
 787     type_register_static(&usb_device_type_info);
 788 }
 789
 790 type_init(usb_register_types)