1 files changed, 776 insertions, 0 deletions
diff --git a/hw/usb/bus.c b/hw/usb/bus.c
new file mode 100644
index 000000000..92d6ed562
--- /dev/null
+++ b/hw/usb/bus.c
@@ -0,0 +1,776 @@
+#include "qemu/osdep.h"
+#include "hw/qdev-properties.h"
+#include "hw/usb.h"
+#include "qapi/error.h"
+#include "qapi/qapi-commands-machine.h"
+#include "qapi/type-helpers.h"
+#include "qemu/error-report.h"
+#include "qemu/module.h"
+#include "sysemu/sysemu.h"
+#include "migration/vmstate.h"
+#include "monitor/monitor.h"
+#include "trace.h"
+#include "qemu/cutils.h"
+
+static void usb_bus_dev_print(Monitor *mon, DeviceState *qdev, int indent);
+
+static char *usb_get_dev_path(DeviceState *dev);
+static char *usb_get_fw_dev_path(DeviceState *qdev);
+static void usb_qdev_unrealize(DeviceState *qdev);
+
+static Property usb_props[] = {
+    DEFINE_PROP_STRING("port", USBDevice, port_path),
+    DEFINE_PROP_STRING("serial", USBDevice, serial),
+    DEFINE_PROP_BIT("msos-desc", USBDevice, flags,
+                    USB_DEV_FLAG_MSOS_DESC_ENABLE, true),
+    DEFINE_PROP_STRING("pcap", USBDevice, pcap_filename),
+    DEFINE_PROP_END_OF_LIST()
+};
+
+static void usb_bus_class_init(ObjectClass *klass, void *data)
+{
+    BusClass *k = BUS_CLASS(klass);
+    HotplugHandlerClass *hc = HOTPLUG_HANDLER_CLASS(klass);
+
+    k->print_dev = usb_bus_dev_print;
+    k->get_dev_path = usb_get_dev_path;
+    k->get_fw_dev_path = usb_get_fw_dev_path;
+    hc->unplug = qdev_simple_device_unplug_cb;
+}
+
+static const TypeInfo usb_bus_info = {
+    .name = TYPE_USB_BUS,
+    .parent = TYPE_BUS,
+    .instance_size = sizeof(USBBus),
+    .class_init = usb_bus_class_init,
+    .interfaces = (InterfaceInfo[]) {
+        { TYPE_HOTPLUG_HANDLER },
+        { }
+    }
+};
+
+static int next_usb_bus = 0;
+static QTAILQ_HEAD(, USBBus) busses = QTAILQ_HEAD_INITIALIZER(busses);
+
+static int usb_device_post_load(void *opaque, int version_id)
+{
+    USBDevice *dev = opaque;
+
+    if (dev->state == USB_STATE_NOTATTACHED) {
+        dev->attached = false;
+    } else {
+        dev->attached = true;
+    }
+    return 0;
+}
+
+const VMStateDescription vmstate_usb_device = {
+    .name = "USBDevice",
+    .version_id = 1,
+    .minimum_version_id = 1,
+    .post_load = usb_device_post_load,
+    .fields = (VMStateField[]) {
+        VMSTATE_UINT8(addr, USBDevice),
+        VMSTATE_INT32(state, USBDevice),
+        VMSTATE_INT32(remote_wakeup, USBDevice),
+        VMSTATE_INT32(setup_state, USBDevice),
+        VMSTATE_INT32(setup_len, USBDevice),
+        VMSTATE_INT32(setup_index, USBDevice),
+        VMSTATE_UINT8_ARRAY(setup_buf, USBDevice, 8),
+        VMSTATE_END_OF_LIST(),
+    }
+};
+
+void usb_bus_new(USBBus *bus, size_t bus_size,
+                 USBBusOps *ops, DeviceState *host)
+{
+    qbus_init(bus, bus_size, TYPE_USB_BUS, host, NULL);
+    qbus_set_bus_hotplug_handler(BUS(bus));
+    bus->ops = ops;
+    bus->busnr = next_usb_bus++;
+    QTAILQ_INIT(&bus->free);
+    QTAILQ_INIT(&bus->used);
+    QTAILQ_INSERT_TAIL(&busses, bus, next);
+}
+
+void usb_bus_release(USBBus *bus)
+{
+    assert(next_usb_bus > 0);
+
+    QTAILQ_REMOVE(&busses, bus, next);
+}
+
+USBBus *usb_bus_find(int busnr)
+{
+    USBBus *bus;
+
+    if (-1 == busnr)
+        return QTAILQ_FIRST(&busses);
+    QTAILQ_FOREACH(bus, &busses, next) {
+        if (bus->busnr == busnr)
+            return bus;
+    }
+    return NULL;
+}
+
+static void usb_device_realize(USBDevice *dev, Error **errp)
+{
+    USBDeviceClass *klass = USB_DEVICE_GET_CLASS(dev);
+
+    if (klass->realize) {
+        klass->realize(dev, errp);
+    }
+}
+
+USBDevice *usb_device_find_device(USBDevice *dev, uint8_t addr)
+{
+    USBDeviceClass *klass = USB_DEVICE_GET_CLASS(dev);
+    if (klass->find_device) {
+        return klass->find_device(dev, addr);
+    }
+    return NULL;
+}
+
+static void usb_device_unrealize(USBDevice *dev)
+{
+    USBDeviceClass *klass = USB_DEVICE_GET_CLASS(dev);
+
+    if (klass->unrealize) {
+        klass->unrealize(dev);
+    }
+}
+
+void usb_device_cancel_packet(USBDevice *dev, USBPacket *p)
+{
+    USBDeviceClass *klass = USB_DEVICE_GET_CLASS(dev);
+    if (klass->cancel_packet) {
+        klass->cancel_packet(dev, p);
+    }
+}
+
+void usb_device_handle_attach(USBDevice *dev)
+{
+    USBDeviceClass *klass = USB_DEVICE_GET_CLASS(dev);
+    if (klass->handle_attach) {
+        klass->handle_attach(dev);
+    }
+}
+
+void usb_device_handle_reset(USBDevice *dev)
+{
+    USBDeviceClass *klass = USB_DEVICE_GET_CLASS(dev);
+    if (klass->handle_reset) {
+        klass->handle_reset(dev);
+    }
+}
+
+void usb_device_handle_control(USBDevice *dev, USBPacket *p, int request,
+                               int value, int index, int length, uint8_t *data)
+{
+    USBDeviceClass *klass = USB_DEVICE_GET_CLASS(dev);
+    if (klass->handle_control) {
+        klass->handle_control(dev, p, request, value, index, length, data);
+    }
+}
+
+void usb_device_handle_data(USBDevice *dev, USBPacket *p)
+{
+    USBDeviceClass *klass = USB_DEVICE_GET_CLASS(dev);
+    if (klass->handle_data) {
+        klass->handle_data(dev, p);
+    }
+}
+
+const char *usb_device_get_product_desc(USBDevice *dev)
+{
+    USBDeviceClass *klass = USB_DEVICE_GET_CLASS(dev);
+    return klass->product_desc;
+}
+
+const USBDesc *usb_device_get_usb_desc(USBDevice *dev)
+{
+    USBDeviceClass *klass = USB_DEVICE_GET_CLASS(dev);
+    if (dev->usb_desc) {
+        return dev->usb_desc;
+    }
+    return klass->usb_desc;
+}
+
+void usb_device_set_interface(USBDevice *dev, int interface,
+                              int alt_old, int alt_new)
+{
+    USBDeviceClass *klass = USB_DEVICE_GET_CLASS(dev);
+    if (klass->set_interface) {
+        klass->set_interface(dev, interface, alt_old, alt_new);
+    }
+}
+
+void usb_device_flush_ep_queue(USBDevice *dev, USBEndpoint *ep)
+{
+    USBDeviceClass *klass = USB_DEVICE_GET_CLASS(dev);
+    if (klass->flush_ep_queue) {
+        klass->flush_ep_queue(dev, ep);
+    }
+}
+
+void usb_device_ep_stopped(USBDevice *dev, USBEndpoint *ep)
+{
+    USBDeviceClass *klass = USB_DEVICE_GET_CLASS(dev);
+    if (klass->ep_stopped) {
+        klass->ep_stopped(dev, ep);
+    }
+}
+
+int usb_device_alloc_streams(USBDevice *dev, USBEndpoint **eps, int nr_eps,
+                             int streams)
+{
+    USBDeviceClass *klass = USB_DEVICE_GET_CLASS(dev);
+    if (klass->alloc_streams) {
+        return klass->alloc_streams(dev, eps, nr_eps, streams);
+    }
+    return 0;
+}
+
+void usb_device_free_streams(USBDevice *dev, USBEndpoint **eps, int nr_eps)
+{
+    USBDeviceClass *klass = USB_DEVICE_GET_CLASS(dev);
+    if (klass->free_streams) {
+        klass->free_streams(dev, eps, nr_eps);
+    }
+}
+
+static void usb_qdev_realize(DeviceState *qdev, Error **errp)
+{
+    USBDevice *dev = USB_DEVICE(qdev);
+    Error *local_err = NULL;
+
+    pstrcpy(dev->product_desc, sizeof(dev->product_desc),
+            usb_device_get_product_desc(dev));
+    dev->auto_attach = 1;
+    QLIST_INIT(&dev->strings);
+    usb_ep_init(dev);
+
+    usb_claim_port(dev, &local_err);
+    if (local_err) {
+        error_propagate(errp, local_err);
+        return;
+    }
+
+    usb_device_realize(dev, &local_err);
+    if (local_err) {
+        usb_release_port(dev);
+        error_propagate(errp, local_err);
+        return;
+    }
+
+    if (dev->auto_attach) {
+        usb_device_attach(dev, &local_err);
+        if (local_err) {
+            usb_qdev_unrealize(qdev);
+            error_propagate(errp, local_err);
+            return;
+        }
+    }
+
+    if (dev->pcap_filename) {
+        int fd = qemu_open_old(dev->pcap_filename, O_CREAT | O_WRONLY | O_TRUNC, 0666);
+        if (fd < 0) {
+            error_setg(errp, "open %s failed", dev->pcap_filename);
+            usb_qdev_unrealize(qdev);
+            return;
+        }
+        dev->pcap = fdopen(fd, "w");
+        usb_pcap_init(dev->pcap);
+    }
+}
+
+static void usb_qdev_unrealize(DeviceState *qdev)
+{
+    USBDevice *dev = USB_DEVICE(qdev);
+    USBDescString *s, *next;
+
+    QLIST_FOREACH_SAFE(s, &dev->strings, next, next) {
+        QLIST_REMOVE(s, next);
+        g_free(s->str);
+        g_free(s);
+    }
+
+    if (dev->pcap) {
+        fclose(dev->pcap);
+    }
+
+    if (dev->attached) {
+        usb_device_detach(dev);
+    }
+    usb_device_unrealize(dev);
+    if (dev->port) {
+        usb_release_port(dev);
+    }
+}
+
+typedef struct LegacyUSBFactory
+{
+    const char *name;
+    const char *usbdevice_name;
+    USBDevice *(*usbdevice_init)(void);
+} LegacyUSBFactory;
+
+static GSList *legacy_usb_factory;
+
+void usb_legacy_register(const char *typename, const char *usbdevice_name,
+                         USBDevice *(*usbdevice_init)(void))
+{
+    if (usbdevice_name) {
+        LegacyUSBFactory *f = g_malloc0(sizeof(*f));
+        f->name = typename;
+        f->usbdevice_name = usbdevice_name;
+        f->usbdevice_init = usbdevice_init;
+        legacy_usb_factory = g_slist_append(legacy_usb_factory, f);
+    }
+}
+
+USBDevice *usb_new(const char *name)
+{
+    return USB_DEVICE(qdev_new(name));
+}
+
+static USBDevice *usb_try_new(const char *name)
+{
+    return USB_DEVICE(qdev_try_new(name));
+}
+
+bool usb_realize_and_unref(USBDevice *dev, USBBus *bus, Error **errp)
+{
+    return qdev_realize_and_unref(&dev->qdev, &bus->qbus, errp);
+}
+
+USBDevice *usb_create_simple(USBBus *bus, const char *name)
+{
+    USBDevice *dev = usb_new(name);
+
+    usb_realize_and_unref(dev, bus, &error_abort);
+    return dev;
+}
+
+static void usb_fill_port(USBPort *port, void *opaque, int index,
+                          USBPortOps *ops, int speedmask)
+{
+    port->opaque = opaque;
+    port->index = index;
+    port->ops = ops;
+    port->speedmask = speedmask;
+    usb_port_location(port, NULL, index + 1);
+}
+
+void usb_register_port(USBBus *bus, USBPort *port, void *opaque, int index,
+                       USBPortOps *ops, int speedmask)
+{
+    usb_fill_port(port, opaque, index, ops, speedmask);
+    QTAILQ_INSERT_TAIL(&bus->free, port, next);
+    bus->nfree++;
+}
+
+void usb_register_companion(const char *masterbus, USBPort *ports[],
+                            uint32_t portcount, uint32_t firstport,
+                            void *opaque, USBPortOps *ops, int speedmask,
+                            Error **errp)
+{
+    USBBus *bus;
+    int i;
+
+    QTAILQ_FOREACH(bus, &busses, next) {
+        if (strcmp(bus->qbus.name, masterbus) == 0) {
+            break;
+        }
+    }
+
+    if (!bus) {
+        error_setg(errp, "USB bus '%s' not found", masterbus);
+        return;
+    }
+    if (!bus->ops->register_companion) {
+        error_setg(errp, "Can't use USB bus '%s' as masterbus,"
+                   " it doesn't support companion controllers",
+                   masterbus);
+        return;
+    }
+
+    for (i = 0; i < portcount; i++) {
+        usb_fill_port(ports[i], opaque, i, ops, speedmask);
+    }
+
+    bus->ops->register_companion(bus, ports, portcount, firstport, errp);
+}
+
+void usb_port_location(USBPort *downstream, USBPort *upstream, int portnr)
+{
+    if (upstream) {
+        int l = snprintf(downstream->path, sizeof(downstream->path), "%s.%d",
+                         upstream->path, portnr);
+        /* Max string is nn.nn.nn.nn.nn, which fits in 16 bytes */
+        assert(l < sizeof(downstream->path));
+        downstream->hubcount = upstream->hubcount + 1;
+    } else {
+        snprintf(downstream->path, sizeof(downstream->path), "%d", portnr);
+        downstream->hubcount = 0;
+    }
+}
+
+void usb_unregister_port(USBBus *bus, USBPort *port)
+{
+    if (port->dev) {
+        object_unparent(OBJECT(port->dev));
+    }
+    QTAILQ_REMOVE(&bus->free, port, next);
+    bus->nfree--;
+}
+
+void usb_claim_port(USBDevice *dev, Error **errp)
+{
+    USBBus *bus = usb_bus_from_device(dev);
+    USBPort *port;
+    USBDevice *hub;
+
+    assert(dev->port == NULL);
+
+    if (dev->port_path) {
+        QTAILQ_FOREACH(port, &bus->free, next) {
+            if (strcmp(port->path, dev->port_path) == 0) {
+                break;
+            }
+        }
+        if (port == NULL) {
+            error_setg(errp, "usb port %s (bus %s) not found (in use?)",
+                       dev->port_path, bus->qbus.name);
+            return;
+        }
+    } else {
+        if (bus->nfree == 1 && strcmp(object_get_typename(OBJECT(dev)), "usb-hub") != 0) {
+            /* Create a new hub and chain it on */
+            hub = usb_try_new("usb-hub");
+            if (hub) {
+                usb_realize_and_unref(hub, bus, NULL);
+            }
+        }
+        if (bus->nfree == 0) {
+            error_setg(errp, "tried to attach usb device %s to a bus "
+                       "with no free ports", dev->product_desc);
+            return;
+        }
+        port = QTAILQ_FIRST(&bus->free);
+    }
+    trace_usb_port_claim(bus->busnr, port->path);
+
+    QTAILQ_REMOVE(&bus->free, port, next);
+    bus->nfree--;
+
+    dev->port = port;
+    port->dev = dev;
+
+    QTAILQ_INSERT_TAIL(&bus->used, port, next);
+    bus->nused++;
+}
+
+void usb_release_port(USBDevice *dev)
+{
+    USBBus *bus = usb_bus_from_device(dev);
+    USBPort *port = dev->port;
+
+    assert(port != NULL);
+    trace_usb_port_release(bus->busnr, port->path);
+
+    QTAILQ_REMOVE(&bus->used, port, next);
+    bus->nused--;
+
+    dev->port = NULL;
+    port->dev = NULL;
+
+    QTAILQ_INSERT_TAIL(&bus->free, port, next);
+    bus->nfree++;
+}
+
+static void usb_mask_to_str(char *dest, size_t size,
+                            unsigned int speedmask)
+{
+    static const struct {
+        unsigned int mask;
+        const char *name;
+    } speeds[] = {
+        { .mask = USB_SPEED_MASK_FULL,  .name = "full"  },
+        { .mask = USB_SPEED_MASK_HIGH,  .name = "high"  },
+        { .mask = USB_SPEED_MASK_SUPER, .name = "super" },
+    };
+    int i, pos = 0;
+
+    for (i = 0; i < ARRAY_SIZE(speeds); i++) {
+        if (speeds[i].mask & speedmask) {
+            pos += snprintf(dest + pos, size - pos, "%s%s",
+                            pos ? "+" : "",
+                            speeds[i].name);
+        }
+    }
+
+    if (pos == 0) {
+        snprintf(dest, size, "unknown");
+    }
+}
+
+void usb_check_attach(USBDevice *dev, Error **errp)
+{
+    USBBus *bus = usb_bus_from_device(dev);
+    USBPort *port = dev->port;
+    char devspeed[32], portspeed[32];
+
+    assert(port != NULL);
+    assert(!dev->attached);
+    usb_mask_to_str(devspeed, sizeof(devspeed), dev->speedmask);
+    usb_mask_to_str(portspeed, sizeof(portspeed), port->speedmask);
+    trace_usb_port_attach(bus->busnr, port->path,
+                          devspeed, portspeed);
+
+    if (!(port->speedmask & dev->speedmask)) {
+        error_setg(errp, "Warning: speed mismatch trying to attach"
+                   " usb device \"%s\" (%s speed)"
+                   " to bus \"%s\", port \"%s\" (%s speed)",
+                   dev->product_desc, devspeed,
+                   bus->qbus.name, port->path, portspeed);
+        return;
+    }
+}
+
+void usb_device_attach(USBDevice *dev, Error **errp)
+{
+    USBPort *port = dev->port;
+    Error *local_err = NULL;
+
+    usb_check_attach(dev, &local_err);
+    if (local_err) {
+        error_propagate(errp, local_err);
+        return;
+    }
+
+    dev->attached = true;
+    usb_attach(port);
+}
+
+int usb_device_detach(USBDevice *dev)
+{
+    USBBus *bus = usb_bus_from_device(dev);
+    USBPort *port = dev->port;
+
+    assert(port != NULL);
+    assert(dev->attached);
+    trace_usb_port_detach(bus->busnr, port->path);
+
+    usb_detach(port);
+    dev->attached = false;
+    return 0;
+}
+
+static const char *usb_speed(unsigned int speed)
+{
+    static const char *txt[] = {
+        [ USB_SPEED_LOW  ] = "1.5",
+        [ USB_SPEED_FULL ] = "12",
+        [ USB_SPEED_HIGH ] = "480",
+        [ USB_SPEED_SUPER ] = "5000",
+    };
+    if (speed >= ARRAY_SIZE(txt))
+        return "?";
+    return txt[speed];
+}
+
+static void usb_bus_dev_print(Monitor *mon, DeviceState *qdev, int indent)
+{
+    USBDevice *dev = USB_DEVICE(qdev);
+    USBBus *bus = usb_bus_from_device(dev);
+
+    monitor_printf(mon, "%*saddr %d.%d, port %s, speed %s, name %s%s\n",
+                   indent, "", bus->busnr, dev->addr,
+                   dev->port ? dev->port->path : "-",
+                   usb_speed(dev->speed), dev->product_desc,
+                   dev->attached ? ", attached" : "");
+}
+
+static char *usb_get_dev_path(DeviceState *qdev)
+{
+    USBDevice *dev = USB_DEVICE(qdev);
+    DeviceState *hcd = qdev->parent_bus->parent;
+    char *id = qdev_get_dev_path(hcd);
+
+    if (id) {
+        char *ret = g_strdup_printf("%s/%s", id, dev->port->path);
+        g_free(id);
+        return ret;
+    } else {
+        return g_strdup(dev->port->path);
+    }
+}
+
+static char *usb_get_fw_dev_path(DeviceState *qdev)
+{
+    USBDevice *dev = USB_DEVICE(qdev);
+    char *fw_path, *in;
+    ssize_t pos = 0, fw_len;
+    long nr;
+
+    fw_len = 32 + strlen(dev->port->path) * 6;
+    fw_path = g_malloc(fw_len);
+    in = dev->port->path;
+    while (fw_len - pos > 0) {
+        nr = strtol(in, &in, 10);
+        if (in[0] == '.') {
+            /* some hub between root port and device */
+            pos += snprintf(fw_path + pos, fw_len - pos, "hub@%lx/", nr);
+            in++;
+        } else {
+            /* the device itself */
+            snprintf(fw_path + pos, fw_len - pos, "%s@%lx",
+                     qdev_fw_name(qdev), nr);
+            break;
+        }
+    }
+    return fw_path;
+}
+
+HumanReadableText *qmp_x_query_usb(Error **errp)
+{
+    g_autoptr(GString) buf = g_string_new("");
+    USBBus *bus;
+    USBDevice *dev;
+    USBPort *port;
+
+    if (QTAILQ_EMPTY(&busses)) {
+        error_setg(errp, "USB support not enabled");
+        return NULL;
+    }
+
+    QTAILQ_FOREACH(bus, &busses, next) {
+        QTAILQ_FOREACH(port, &bus->used, next) {
+            dev = port->dev;
+            if (!dev)
+                continue;
+            g_string_append_printf(buf,
+                                   "  Device %d.%d, Port %s, Speed %s Mb/s, "
+                                   "Product %s%s%s\n",
+                                   bus->busnr, dev->addr, port->path,
+                                   usb_speed(dev->speed), dev->product_desc,
+                                   dev->qdev.id ? ", ID: " : "",
+                                   dev->qdev.id ?: "");
+        }
+    }
+
+    return human_readable_text_from_str(buf);
+}
+
+/* handle legacy -usbdevice cmd line option */
+USBDevice *usbdevice_create(const char *driver)
+{
+    USBBus *bus = usb_bus_find(-1 /* any */);
+    LegacyUSBFactory *f = NULL;
+    Error *err = NULL;
+    GSList *i;
+    USBDevice *dev;
+
+    if (strchr(driver, ':')) {
+        error_report("usbdevice parameters are not supported anymore");
+        return NULL;
+    }
+
+    for (i = legacy_usb_factory; i; i = i->next) {
+        f = i->data;
+        if (strcmp(f->usbdevice_name, driver) == 0) {
+            break;
+        }
+    }
+    if (i == NULL) {
+#if 0
+        /* no error because some drivers are not converted (yet) */
+        error_report("usbdevice %s not found", driver);
+#endif
+        return NULL;
+    }
+
+    if (!bus) {
+        error_report("Error: no usb bus to attach usbdevice %s, "
+                     "please try -machine usb=on and check that "
+                     "the machine model supports USB", driver);
+        return NULL;
+    }
+
+    dev = f->usbdevice_init ? f->usbdevice_init() : usb_new(f->name);
+    if (!dev) {
+        error_report("Failed to create USB device '%s'", f->name);
+        return NULL;
+    }
+    if (!usb_realize_and_unref(dev, bus, &err)) {
+        error_reportf_err(err, "Failed to initialize USB device '%s': ",
+                          f->name);
+        object_unparent(OBJECT(dev));
+        return NULL;
+    }
+    return dev;
+}
+
+static bool usb_get_attached(Object *obj, Error **errp)
+{
+    USBDevice *dev = USB_DEVICE(obj);
+
+    return dev->attached;
+}
+
+static void usb_set_attached(Object *obj, bool value, Error **errp)
+{
+    USBDevice *dev = USB_DEVICE(obj);
+
+    if (dev->attached == value) {
+        return;
+    }
+
+    if (value) {
+        usb_device_attach(dev, errp);
+    } else {
+        usb_device_detach(dev);
+    }
+}
+
+static void usb_device_instance_init(Object *obj)
+{
+    USBDevice *dev = USB_DEVICE(obj);
+    USBDeviceClass *klass = USB_DEVICE_GET_CLASS(dev);
+
+    if (klass->attached_settable) {
+        object_property_add_bool(obj, "attached",
+                                 usb_get_attached, usb_set_attached);
+    } else {
+        object_property_add_bool(obj, "attached",
+                                 usb_get_attached, NULL);
+    }
+}
+
+static void usb_device_class_init(ObjectClass *klass, void *data)
+{
+    DeviceClass *k = DEVICE_CLASS(klass);
+    k->bus_type = TYPE_USB_BUS;
+    k->realize  = usb_qdev_realize;
+    k->unrealize = usb_qdev_unrealize;
+    device_class_set_props(k, usb_props);
+}
+
+static const TypeInfo usb_device_type_info = {
+    .name = TYPE_USB_DEVICE,
+    .parent = TYPE_DEVICE,
+    .instance_size = sizeof(USBDevice),
+    .instance_init = usb_device_instance_init,
+    .abstract = true,
+    .class_size = sizeof(USBDeviceClass),
+    .class_init = usb_device_class_init,
+};
+
+static void usb_register_types(void)
+{
+    type_register_static(&usb_bus_info);
+    type_register_static(&usb_device_type_info);
+}
+
+type_init(usb_register_types)