hw/usb/bus.c

   1 #include "qemu/osdep.h"
   2 #include "hw/hw.h"
   3 #include "hw/usb.h"
   4 #include "hw/qdev.h"
   5 #include "qapi/error.h"
   6 #include "qemu/error-report.h"
   7 #include "sysemu/sysemu.h"
   8 #include "monitor/monitor.h"
   9 #include "trace.h"
  10 #include "qemu/cutils.h"
  11
  12 static void usb_bus_dev_print(Monitor *mon, DeviceState *qdev, int indent);
  13
  14 static char *usb_get_dev_path(DeviceState *dev);
  15 static char *usb_get_fw_dev_path(DeviceState *qdev);
  16 static void usb_qdev_unrealize(DeviceState *qdev, Error **errp);
  17
  18 static Property usb_props[] = {
  19     DEFINE_PROP_STRING("port", USBDevice, port_path),
  20     DEFINE_PROP_STRING("serial", USBDevice, serial),
  21     DEFINE_PROP_BIT("full-path", USBDevice, flags,
  22                     USB_DEV_FLAG_FULL_PATH, true),
  23     DEFINE_PROP_BIT("msos-desc", USBDevice, flags,
  24                     USB_DEV_FLAG_MSOS_DESC_ENABLE, true),
  25     DEFINE_PROP_END_OF_LIST()
  26 };
  27
  28 static void usb_bus_class_init(ObjectClass *klass, void *data)
  29 {
  30     BusClass *k = BUS_CLASS(klass);
  31     HotplugHandlerClass *hc = HOTPLUG_HANDLER_CLASS(klass);
  32
  33     k->print_dev = usb_bus_dev_print;
  34     k->get_dev_path = usb_get_dev_path;
  35     k->get_fw_dev_path = usb_get_fw_dev_path;
  36     hc->unplug = qdev_simple_device_unplug_cb;
  37 }
  38
  39 static const TypeInfo usb_bus_info = {
  40     .name = TYPE_USB_BUS,
  41     .parent = TYPE_BUS,
  42     .instance_size = sizeof(USBBus),
  43     .class_init = usb_bus_class_init,
  44     .interfaces = (InterfaceInfo[]) {
  45         { TYPE_HOTPLUG_HANDLER },
  46         { }
  47     }
  48 };
  49
  50 static int next_usb_bus = 0;
  51 static QTAILQ_HEAD(, USBBus) busses = QTAILQ_HEAD_INITIALIZER(busses);
  52
  53 static int usb_device_post_load(void *opaque, int version_id)
  54 {
  55     USBDevice *dev = opaque;
  56
  57     if (dev->state == USB_STATE_NOTATTACHED) {
  58         dev->attached = false;
  59     } else {
  60         dev->attached = true;
  61     }
  62     if (dev->setup_index < 0 ||
  63         dev->setup_len < 0 ||
  64         dev->setup_index > dev->setup_len ||
  65         dev->setup_len > sizeof(dev->data_buf)) {
  66         return -EINVAL;
  67     }
  68     return 0;
  69 }
  70
  71 const VMStateDescription vmstate_usb_device = {
  72     .name = "USBDevice",
  73     .version_id = 1,
  74     .minimum_version_id = 1,
  75     .post_load = usb_device_post_load,
  76     .fields = (VMStateField[]) {
  77         VMSTATE_UINT8(addr, USBDevice),
  78         VMSTATE_INT32(state, USBDevice),
  79         VMSTATE_INT32(remote_wakeup, USBDevice),
  80         VMSTATE_INT32(setup_state, USBDevice),
  81         VMSTATE_INT32(setup_len, USBDevice),
  82         VMSTATE_INT32(setup_index, USBDevice),
  83         VMSTATE_UINT8_ARRAY(setup_buf, USBDevice, 8),
  84         VMSTATE_END_OF_LIST(),
  85     }
  86 };
  87
  88 void usb_bus_new(USBBus *bus, size_t bus_size,
  89                  USBBusOps *ops, DeviceState *host)
  90 {
  91     qbus_create_inplace(bus, bus_size, TYPE_USB_BUS, host, NULL);
  92     qbus_set_bus_hotplug_handler(BUS(bus), &error_abort);
  93     bus->ops = ops;
  94     bus->busnr = next_usb_bus++;
  95     QTAILQ_INIT(&bus->free);
  96     QTAILQ_INIT(&bus->used);
  97     QTAILQ_INSERT_TAIL(&busses, bus, next);
  98 }
  99
 100 void usb_bus_release(USBBus *bus)
 101 {
 102     assert(next_usb_bus > 0);
 103
 104     QTAILQ_REMOVE(&busses, bus, next);
 105 }
 106
 107 USBBus *usb_bus_find(int busnr)
 108 {
 109     USBBus *bus;
 110
 111     if (-1 == busnr)
 112         return QTAILQ_FIRST(&busses);
 113     QTAILQ_FOREACH(bus, &busses, next) {
 114         if (bus->busnr == busnr)
 115             return bus;
 116     }
 117     return NULL;
 118 }
 119
 120 static void usb_device_realize(USBDevice *dev, Error **errp)
 121 {
 122     USBDeviceClass *klass = USB_DEVICE_GET_CLASS(dev);
 123
 124     if (klass->realize) {
 125         klass->realize(dev, errp);
 126     }
 127 }
 128
 129 USBDevice *usb_device_find_device(USBDevice *dev, uint8_t addr)
 130 {
 131     USBDeviceClass *klass = USB_DEVICE_GET_CLASS(dev);
 132     if (klass->find_device) {
 133         return klass->find_device(dev, addr);
 134     }
 135     return NULL;
 136 }
 137
 138 static void usb_device_handle_destroy(USBDevice *dev)
 139 {
 140     USBDeviceClass *klass = USB_DEVICE_GET_CLASS(dev);
 141     if (klass->handle_destroy) {
 142         klass->handle_destroy(dev);
 143     }
 144 }
 145
 146 void usb_device_cancel_packet(USBDevice *dev, USBPacket *p)
 147 {
 148     USBDeviceClass *klass = USB_DEVICE_GET_CLASS(dev);
 149     if (klass->cancel_packet) {
 150         klass->cancel_packet(dev, p);
 151     }
 152 }
 153
 154 void usb_device_handle_attach(USBDevice *dev)
 155 {
 156     USBDeviceClass *klass = USB_DEVICE_GET_CLASS(dev);
 157     if (klass->handle_attach) {
 158         klass->handle_attach(dev);
 159     }
 160 }
 161
 162 void usb_device_handle_reset(USBDevice *dev)
 163 {
 164     USBDeviceClass *klass = USB_DEVICE_GET_CLASS(dev);
 165     if (klass->handle_reset) {
 166         klass->handle_reset(dev);
 167     }
 168 }
 169
 170 void usb_device_handle_control(USBDevice *dev, USBPacket *p, int request,
 171                                int value, int index, int length, uint8_t *data)
 172 {
 173     USBDeviceClass *klass = USB_DEVICE_GET_CLASS(dev);
 174     if (klass->handle_control) {
 175         klass->handle_control(dev, p, request, value, index, length, data);
 176     }
 177 }
 178
 179 void usb_device_handle_data(USBDevice *dev, USBPacket *p)
 180 {
 181     USBDeviceClass *klass = USB_DEVICE_GET_CLASS(dev);
 182     if (klass->handle_data) {
 183         klass->handle_data(dev, p);
 184     }
 185 }
 186
 187 const char *usb_device_get_product_desc(USBDevice *dev)
 188 {
 189     USBDeviceClass *klass = USB_DEVICE_GET_CLASS(dev);
 190     return klass->product_desc;
 191 }
 192
 193 const USBDesc *usb_device_get_usb_desc(USBDevice *dev)
 194 {
 195     USBDeviceClass *klass = USB_DEVICE_GET_CLASS(dev);
 196     if (dev->usb_desc) {
 197         return dev->usb_desc;
 198     }
 199     return klass->usb_desc;
 200 }
 201
 202 void usb_device_set_interface(USBDevice *dev, int interface,
 203                               int alt_old, int alt_new)
 204 {
 205     USBDeviceClass *klass = USB_DEVICE_GET_CLASS(dev);
 206     if (klass->set_interface) {
 207         klass->set_interface(dev, interface, alt_old, alt_new);
 208     }
 209 }
 210
 211 void usb_device_flush_ep_queue(USBDevice *dev, USBEndpoint *ep)
 212 {
 213     USBDeviceClass *klass = USB_DEVICE_GET_CLASS(dev);
 214     if (klass->flush_ep_queue) {
 215         klass->flush_ep_queue(dev, ep);
 216     }
 217 }
 218
 219 void usb_device_ep_stopped(USBDevice *dev, USBEndpoint *ep)
 220 {
 221     USBDeviceClass *klass = USB_DEVICE_GET_CLASS(dev);
 222     if (klass->ep_stopped) {
 223         klass->ep_stopped(dev, ep);
 224     }
 225 }
 226
 227 int usb_device_alloc_streams(USBDevice *dev, USBEndpoint **eps, int nr_eps,
 228                              int streams)
 229 {
 230     USBDeviceClass *klass = USB_DEVICE_GET_CLASS(dev);
 231     if (klass->alloc_streams) {
 232         return klass->alloc_streams(dev, eps, nr_eps, streams);
 233     }
 234     return 0;
 235 }
 236
 237 void usb_device_free_streams(USBDevice *dev, USBEndpoint **eps, int nr_eps)
 238 {
 239     USBDeviceClass *klass = USB_DEVICE_GET_CLASS(dev);
 240     if (klass->free_streams) {
 241         klass->free_streams(dev, eps, nr_eps);
 242     }
 243 }
 244
 245 static void usb_qdev_realize(DeviceState *qdev, Error **errp)
 246 {
 247     USBDevice *dev = USB_DEVICE(qdev);
 248     Error *local_err = NULL;
 249
 250     pstrcpy(dev->product_desc, sizeof(dev->product_desc),
 251             usb_device_get_product_desc(dev));
 252     dev->auto_attach = 1;
 253     QLIST_INIT(&dev->strings);
 254     usb_ep_init(dev);
 255
 256     usb_claim_port(dev, &local_err);
 257     if (local_err) {
 258         error_propagate(errp, local_err);
 259         return;
 260     }
 261
 262     usb_device_realize(dev, &local_err);
 263     if (local_err) {
 264         usb_release_port(dev);
 265         error_propagate(errp, local_err);
 266         return;
 267     }
 268
 269     if (dev->auto_attach) {
 270         usb_device_attach(dev, &local_err);
 271         if (local_err) {
 272             usb_qdev_unrealize(qdev, NULL);
 273             error_propagate(errp, local_err);
 274             return;
 275         }
 276     }
 277 }
 278
 279 static void usb_qdev_unrealize(DeviceState *qdev, Error **errp)
 280 {
 281     USBDevice *dev = USB_DEVICE(qdev);
 282     USBDescString *s, *next;
 283
 284     QLIST_FOREACH_SAFE(s, &dev->strings, next, next) {
 285         QLIST_REMOVE(s, next);
 286         g_free(s->str);
 287         g_free(s);
 288     }
 289
 290     if (dev->attached) {
 291         usb_device_detach(dev);
 292     }
 293     usb_device_handle_destroy(dev);
 294     if (dev->port) {
 295         usb_release_port(dev);
 296     }
 297 }
 298
 299 typedef struct LegacyUSBFactory
 300 {
 301     const char *name;
 302     const char *usbdevice_name;
 303     USBDevice *(*usbdevice_init)(USBBus *bus, const char *params);
 304 } LegacyUSBFactory;
 305
 306 static GSList *legacy_usb_factory;
 307
 308 void usb_legacy_register(const char *typename, const char *usbdevice_name,
 309                          USBDevice *(*usbdevice_init)(USBBus *bus,
 310                                                       const char *params))
 311 {
 312     if (usbdevice_name) {
 313         LegacyUSBFactory *f = g_malloc0(sizeof(*f));
 314         f->name = typename;
 315         f->usbdevice_name = usbdevice_name;
 316         f->usbdevice_init = usbdevice_init;
 317         legacy_usb_factory = g_slist_append(legacy_usb_factory, f);
 318     }
 319 }
 320
 321 USBDevice *usb_create(USBBus *bus, const char *name)
 322 {
 323     DeviceState *dev;
 324
 325     dev = qdev_create(&bus->qbus, name);
 326     return USB_DEVICE(dev);
 327 }
 328
 329 static USBDevice *usb_try_create_simple(USBBus *bus, const char *name,
 330                                         Error **errp)
 331 {
 332     Error *err = NULL;
 333     USBDevice *dev;
 334
 335     dev = USB_DEVICE(qdev_try_create(&bus->qbus, name));
 336     if (!dev) {
 337         error_setg(errp, "Failed to create USB device '%s'", name);
 338         return NULL;
 339     }
 340     object_property_set_bool(OBJECT(dev), true, "realized", &err);
 341     if (err) {
 342         error_propagate(errp, err);
 343         error_prepend(errp, "Failed to initialize USB device '%s': ",
 344                       name);
 345         object_unparent(OBJECT(dev));
 346         return NULL;
 347     }
 348     return dev;
 349 }
 350
 351 USBDevice *usb_create_simple(USBBus *bus, const char *name)
 352 {
 353     return usb_try_create_simple(bus, name, &error_abort);
 354 }
 355
 356 static void usb_fill_port(USBPort *port, void *opaque, int index,
 357                           USBPortOps *ops, int speedmask)
 358 {
 359     port->opaque = opaque;
 360     port->index = index;
 361     port->ops = ops;
 362     port->speedmask = speedmask;
 363     usb_port_location(port, NULL, index + 1);
 364 }
 365
 366 void usb_register_port(USBBus *bus, USBPort *port, void *opaque, int index,
 367                        USBPortOps *ops, int speedmask)
 368 {
 369     usb_fill_port(port, opaque, index, ops, speedmask);
 370     QTAILQ_INSERT_TAIL(&bus->free, port, next);
 371     bus->nfree++;
 372 }
 373
 374 void usb_register_companion(const char *masterbus, USBPort *ports[],
 375                             uint32_t portcount, uint32_t firstport,
 376                             void *opaque, USBPortOps *ops, int speedmask,
 377                             Error **errp)
 378 {
 379     USBBus *bus;
 380     int i;
 381
 382     QTAILQ_FOREACH(bus, &busses, next) {
 383         if (strcmp(bus->qbus.name, masterbus) == 0) {
 384             break;
 385         }
 386     }
 387
 388     if (!bus) {
 389         error_setg(errp, "USB bus '%s' not found", masterbus);
 390         return;
 391     }
 392     if (!bus->ops->register_companion) {
 393         error_setg(errp, "Can't use USB bus '%s' as masterbus,"
 394                    " it doesn't support companion controllers",
 395                    masterbus);
 396         return;
 397     }
 398
 399     for (i = 0; i < portcount; i++) {
 400         usb_fill_port(ports[i], opaque, i, ops, speedmask);
 401     }
 402
 403     bus->ops->register_companion(bus, ports, portcount, firstport, errp);
 404 }
 405
 406 void usb_port_location(USBPort *downstream, USBPort *upstream, int portnr)
 407 {
 408     if (upstream) {
 409         snprintf(downstream->path, sizeof(downstream->path), "%s.%d",
 410                  upstream->path, portnr);
 411         downstream->hubcount = upstream->hubcount + 1;
 412     } else {
 413         snprintf(downstream->path, sizeof(downstream->path), "%d", portnr);
 414         downstream->hubcount = 0;
 415     }
 416 }
 417
 418 void usb_unregister_port(USBBus *bus, USBPort *port)
 419 {
 420     if (port->dev) {
 421         object_unparent(OBJECT(port->dev));
 422     }
 423     QTAILQ_REMOVE(&bus->free, port, next);
 424     bus->nfree--;
 425 }
 426
 427 void usb_claim_port(USBDevice *dev, Error **errp)
 428 {
 429     USBBus *bus = usb_bus_from_device(dev);
 430     USBPort *port;
 431
 432     assert(dev->port == NULL);
 433
 434     if (dev->port_path) {
 435         QTAILQ_FOREACH(port, &bus->free, next) {
 436             if (strcmp(port->path, dev->port_path) == 0) {
 437                 break;
 438             }
 439         }
 440         if (port == NULL) {
 441             error_setg(errp, "usb port %s (bus %s) not found (in use?)",
 442                        dev->port_path, bus->qbus.name);
 443             return;
 444         }
 445     } else {
 446         if (bus->nfree == 1 && strcmp(object_get_typename(OBJECT(dev)), "usb-hub") != 0) {
 447             /* Create a new hub and chain it on */
 448             usb_try_create_simple(bus, "usb-hub", NULL);
 449         }
 450         if (bus->nfree == 0) {
 451             error_setg(errp, "tried to attach usb device %s to a bus "
 452                        "with no free ports", dev->product_desc);
 453             return;
 454         }
 455         port = QTAILQ_FIRST(&bus->free);
 456     }
 457     trace_usb_port_claim(bus->busnr, port->path);
 458
 459     QTAILQ_REMOVE(&bus->free, port, next);
 460     bus->nfree--;
 461
 462     dev->port = port;
 463     port->dev = dev;
 464
 465     QTAILQ_INSERT_TAIL(&bus->used, port, next);
 466     bus->nused++;
 467 }
 468
 469 void usb_release_port(USBDevice *dev)
 470 {
 471     USBBus *bus = usb_bus_from_device(dev);
 472     USBPort *port = dev->port;
 473
 474     assert(port != NULL);
 475     trace_usb_port_release(bus->busnr, port->path);
 476
 477     QTAILQ_REMOVE(&bus->used, port, next);
 478     bus->nused--;
 479
 480     dev->port = NULL;
 481     port->dev = NULL;
 482
 483     QTAILQ_INSERT_TAIL(&bus->free, port, next);
 484     bus->nfree++;
 485 }
 486
 487 static void usb_mask_to_str(char *dest, size_t size,
 488                             unsigned int speedmask)
 489 {
 490     static const struct {
 491         unsigned int mask;
 492         const char *name;
 493     } speeds[] = {
 494         { .mask = USB_SPEED_MASK_FULL,  .name = "full"  },
 495         { .mask = USB_SPEED_MASK_HIGH,  .name = "high"  },
 496         { .mask = USB_SPEED_MASK_SUPER, .name = "super" },
 497     };
 498     int i, pos = 0;
 499
 500     for (i = 0; i < ARRAY_SIZE(speeds); i++) {
 501         if (speeds[i].mask & speedmask) {
 502             pos += snprintf(dest + pos, size - pos, "%s%s",
 503                             pos ? "+" : "",
 504                             speeds[i].name);
 505         }
 506     }
 507 }
 508
 509 void usb_check_attach(USBDevice *dev, Error **errp)
 510 {
 511     USBBus *bus = usb_bus_from_device(dev);
 512     USBPort *port = dev->port;
 513     char devspeed[32], portspeed[32];
 514
 515     assert(port != NULL);
 516     assert(!dev->attached);
 517     usb_mask_to_str(devspeed, sizeof(devspeed), dev->speedmask);
 518     usb_mask_to_str(portspeed, sizeof(portspeed), port->speedmask);
 519     trace_usb_port_attach(bus->busnr, port->path,
 520                           devspeed, portspeed);
 521
 522     if (!(port->speedmask & dev->speedmask)) {
 523         error_setg(errp, "Warning: speed mismatch trying to attach"
 524                    " usb device \"%s\" (%s speed)"
 525                    " to bus \"%s\", port \"%s\" (%s speed)",
 526                    dev->product_desc, devspeed,
 527                    bus->qbus.name, port->path, portspeed);
 528         return;
 529     }
 530 }
 531
 532 void usb_device_attach(USBDevice *dev, Error **errp)
 533 {
 534     USBPort *port = dev->port;
 535     Error *local_err = NULL;
 536
 537     usb_check_attach(dev, &local_err);
 538     if (local_err) {
 539         error_propagate(errp, local_err);
 540         return;
 541     }
 542
 543     dev->attached = true;
 544     usb_attach(port);
 545 }
 546
 547 int usb_device_detach(USBDevice *dev)
 548 {
 549     USBBus *bus = usb_bus_from_device(dev);
 550     USBPort *port = dev->port;
 551
 552     assert(port != NULL);
 553     assert(dev->attached);
 554     trace_usb_port_detach(bus->busnr, port->path);
 555
 556     usb_detach(port);
 557     dev->attached = false;
 558     return 0;
 559 }
 560
 561 int usb_device_delete_addr(int busnr, int addr)
 562 {
 563     USBBus *bus;
 564     USBPort *port;
 565     USBDevice *dev;
 566
 567     bus = usb_bus_find(busnr);
 568     if (!bus)
 569         return -1;
 570
 571     QTAILQ_FOREACH(port, &bus->used, next) {
 572         if (port->dev->addr == addr)
 573             break;
 574     }
 575     if (!port)
 576         return -1;
 577     dev = port->dev;
 578
 579     object_unparent(OBJECT(dev));
 580     return 0;
 581 }
 582
 583 static const char *usb_speed(unsigned int speed)
 584 {
 585     static const char *txt[] = {
 586         [ USB_SPEED_LOW  ] = "1.5",
 587         [ USB_SPEED_FULL ] = "12",
 588         [ USB_SPEED_HIGH ] = "480",
 589         [ USB_SPEED_SUPER ] = "5000",
 590     };
 591     if (speed >= ARRAY_SIZE(txt))
 592         return "?";
 593     return txt[speed];
 594 }
 595
 596 static void usb_bus_dev_print(Monitor *mon, DeviceState *qdev, int indent)
 597 {
 598     USBDevice *dev = USB_DEVICE(qdev);
 599     USBBus *bus = usb_bus_from_device(dev);
 600
 601     monitor_printf(mon, "%*saddr %d.%d, port %s, speed %s, name %s%s\n",
 602                    indent, "", bus->busnr, dev->addr,
 603                    dev->port ? dev->port->path : "-",
 604                    usb_speed(dev->speed), dev->product_desc,
 605                    dev->attached ? ", attached" : "");
 606 }
 607
 608 static char *usb_get_dev_path(DeviceState *qdev)
 609 {
 610     USBDevice *dev = USB_DEVICE(qdev);
 611     DeviceState *hcd = qdev->parent_bus->parent;
 612     char *id = NULL;
 613
 614     if (dev->flags & (1 << USB_DEV_FLAG_FULL_PATH)) {
 615         id = qdev_get_dev_path(hcd);
 616     }
 617     if (id) {
 618         char *ret = g_strdup_printf("%s/%s", id, dev->port->path);
 619         g_free(id);
 620         return ret;
 621     } else {
 622         return g_strdup(dev->port->path);
 623     }
 624 }
 625
 626 static char *usb_get_fw_dev_path(DeviceState *qdev)
 627 {
 628     USBDevice *dev = USB_DEVICE(qdev);
 629     char *fw_path, *in;
 630     ssize_t pos = 0, fw_len;
 631     long nr;
 632
 633     fw_len = 32 + strlen(dev->port->path) * 6;
 634     fw_path = g_malloc(fw_len);
 635     in = dev->port->path;
 636     while (fw_len - pos > 0) {
 637         nr = strtol(in, &in, 10);
 638         if (in[0] == '.') {
 639             /* some hub between root port and device */
 640             pos += snprintf(fw_path + pos, fw_len - pos, "hub@%lx/", nr);
 641             in++;
 642         } else {
 643             /* the device itself */
 644             pos += snprintf(fw_path + pos, fw_len - pos, "%s@%lx",
 645                             qdev_fw_name(qdev), nr);
 646             break;
 647         }
 648     }
 649     return fw_path;
 650 }
 651
 652 void hmp_info_usb(Monitor *mon, const QDict *qdict)
 653 {
 654     USBBus *bus;
 655     USBDevice *dev;
 656     USBPort *port;
 657
 658     if (QTAILQ_EMPTY(&busses)) {
 659         monitor_printf(mon, "USB support not enabled\n");
 660         return;
 661     }
 662
 663     QTAILQ_FOREACH(bus, &busses, next) {
 664         QTAILQ_FOREACH(port, &bus->used, next) {
 665             dev = port->dev;
 666             if (!dev)
 667                 continue;
 668             monitor_printf(mon, "  Device %d.%d, Port %s, Speed %s Mb/s, "
 669                            "Product %s%s%s\n",
 670                            bus->busnr, dev->addr, port->path,
 671                            usb_speed(dev->speed), dev->product_desc,
 672                            dev->qdev.id ? ", ID: " : "",
 673                            dev->qdev.id ?: "");
 674         }
 675     }
 676 }
 677
 678 /* handle legacy -usbdevice cmd line option */
 679 USBDevice *usbdevice_create(const char *cmdline)
 680 {
 681     USBBus *bus = usb_bus_find(-1 /* any */);
 682     LegacyUSBFactory *f = NULL;
 683     Error *err = NULL;
 684     GSList *i;
 685     char driver[32];
 686     const char *params;
 687     int len;
 688     USBDevice *dev;
 689
 690     params = strchr(cmdline,':');
 691     if (params) {
 692         params++;
 693         len = params - cmdline;
 694         if (len > sizeof(driver))
 695             len = sizeof(driver);
 696         pstrcpy(driver, len, cmdline);
 697     } else {
 698         params = "";
 699         pstrcpy(driver, sizeof(driver), cmdline);
 700     }
 701
 702     for (i = legacy_usb_factory; i; i = i->next) {
 703         f = i->data;
 704         if (strcmp(f->usbdevice_name, driver) == 0) {
 705             break;
 706         }
 707     }
 708     if (i == NULL) {
 709 #if 0
 710         /* no error because some drivers are not converted (yet) */
 711         error_report("usbdevice %s not found", driver);
 712 #endif
 713         return NULL;
 714     }
 715
 716     if (!bus) {
 717         error_report("Error: no usb bus to attach usbdevice %s, "
 718                      "please try -machine usb=on and check that "
 719                      "the machine model supports USB", driver);
 720         return NULL;
 721     }
 722
 723     if (f->usbdevice_init) {
 724         dev = f->usbdevice_init(bus, params);
 725     } else {
 726         if (*params) {
 727             error_report("usbdevice %s accepts no params", driver);
 728             return NULL;
 729         }
 730         dev = usb_create(bus, f->name);
 731     }
 732     if (!dev) {
 733         error_report("Failed to create USB device '%s'", f->name);
 734         return NULL;
 735     }
 736     object_property_set_bool(OBJECT(dev), true, "realized", &err);
 737     if (err) {
 738         error_reportf_err(err, "Failed to initialize USB device '%s': ",
 739                           f->name);
 740         object_unparent(OBJECT(dev));
 741         return NULL;
 742     }
 743     return dev;
 744 }
 745
 746 static bool usb_get_attached(Object *obj, Error **errp)
 747 {
 748     USBDevice *dev = USB_DEVICE(obj);
 749
 750     return dev->attached;
 751 }
 752
 753 static void usb_set_attached(Object *obj, bool value, Error **errp)
 754 {
 755     USBDevice *dev = USB_DEVICE(obj);
 756     Error *err = NULL;
 757
 758     if (dev->attached == value) {
 759         return;
 760     }
 761
 762     if (value) {
 763         usb_device_attach(dev, &err);
 764         if (err) {
 765             error_propagate(errp, err);
 766         }
 767     } else {
 768         usb_device_detach(dev);
 769     }
 770 }
 771
 772 static void usb_device_instance_init(Object *obj)
 773 {
 774     USBDevice *dev = USB_DEVICE(obj);
 775     USBDeviceClass *klass = USB_DEVICE_GET_CLASS(dev);
 776
 777     if (klass->attached_settable) {
 778         object_property_add_bool(obj, "attached",
 779                                  usb_get_attached, usb_set_attached,
 780                                  NULL);
 781     } else {
 782         object_property_add_bool(obj, "attached",
 783                                  usb_get_attached, NULL,
 784                                  NULL);
 785     }
 786 }
 787
 788 static void usb_device_class_init(ObjectClass *klass, void *data)
 789 {
 790     DeviceClass *k = DEVICE_CLASS(klass);
 791     k->bus_type = TYPE_USB_BUS;
 792     k->realize  = usb_qdev_realize;
 793     k->unrealize = usb_qdev_unrealize;
 794     k->props    = usb_props;
 795 }
 796
 797 static const TypeInfo usb_device_type_info = {
 798     .name = TYPE_USB_DEVICE,
 799     .parent = TYPE_DEVICE,
 800     .instance_size = sizeof(USBDevice),
 801     .instance_init = usb_device_instance_init,
 802     .abstract = true,
 803     .class_size = sizeof(USBDeviceClass),
 804     .class_init = usb_device_class_init,
 805 };
 806
 807 static void usb_register_types(void)
 808 {
 809     type_register_static(&usb_bus_info);
 810     type_register_static(&usb_device_type_info);
 811 }
 812
 813 type_init(usb_register_types)