xref: /openbmc/qemu/hw/usb/dev-hub.c (revision 2b74dd91)
1 /*
2  * QEMU USB HUB emulation
3  *
4  * Copyright (c) 2005 Fabrice Bellard
5  *
6  * Permission is hereby granted, free of charge, to any person obtaining a copy
7  * of this software and associated documentation files (the "Software"), to deal
8  * in the Software without restriction, including without limitation the rights
9  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10  * copies of the Software, and to permit persons to whom the Software is
11  * furnished to do so, subject to the following conditions:
12  *
13  * The above copyright notice and this permission notice shall be included in
14  * all copies or substantial portions of the Software.
15  *
16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
22  * THE SOFTWARE.
23  */
24 
25 #include "qemu/osdep.h"
26 #include "qapi/error.h"
27 #include "qemu/timer.h"
28 #include "trace.h"
29 #include "hw/qdev-properties.h"
30 #include "hw/usb.h"
31 #include "migration/vmstate.h"
32 #include "desc.h"
33 #include "qemu/error-report.h"
34 #include "qemu/module.h"
35 #include "qom/object.h"
36 
37 #define MAX_PORTS 8
38 
39 typedef struct USBHubPort {
40     USBPort port;
41     uint16_t wPortStatus;
42     uint16_t wPortChange;
43 } USBHubPort;
44 
45 struct USBHubState {
46     USBDevice dev;
47     USBEndpoint *intr;
48     uint32_t num_ports;
49     bool port_power;
50     QEMUTimer *port_timer;
51     USBHubPort ports[MAX_PORTS];
52 };
53 
54 #define TYPE_USB_HUB "usb-hub"
55 OBJECT_DECLARE_SIMPLE_TYPE(USBHubState, USB_HUB)
56 
57 #define ClearHubFeature         (0x2000 | USB_REQ_CLEAR_FEATURE)
58 #define ClearPortFeature        (0x2300 | USB_REQ_CLEAR_FEATURE)
59 #define GetHubDescriptor        (0xa000 | USB_REQ_GET_DESCRIPTOR)
60 #define GetHubStatus            (0xa000 | USB_REQ_GET_STATUS)
61 #define GetPortStatus           (0xa300 | USB_REQ_GET_STATUS)
62 #define SetHubFeature           (0x2000 | USB_REQ_SET_FEATURE)
63 #define SetPortFeature          (0x2300 | USB_REQ_SET_FEATURE)
64 
65 #define PORT_STAT_CONNECTION    0x0001
66 #define PORT_STAT_ENABLE        0x0002
67 #define PORT_STAT_SUSPEND       0x0004
68 #define PORT_STAT_OVERCURRENT   0x0008
69 #define PORT_STAT_RESET         0x0010
70 #define PORT_STAT_POWER         0x0100
71 #define PORT_STAT_LOW_SPEED     0x0200
72 #define PORT_STAT_HIGH_SPEED    0x0400
73 #define PORT_STAT_TEST          0x0800
74 #define PORT_STAT_INDICATOR     0x1000
75 
76 #define PORT_STAT_C_CONNECTION  0x0001
77 #define PORT_STAT_C_ENABLE      0x0002
78 #define PORT_STAT_C_SUSPEND     0x0004
79 #define PORT_STAT_C_OVERCURRENT 0x0008
80 #define PORT_STAT_C_RESET       0x0010
81 
82 #define PORT_CONNECTION         0
83 #define PORT_ENABLE             1
84 #define PORT_SUSPEND            2
85 #define PORT_OVERCURRENT        3
86 #define PORT_RESET              4
87 #define PORT_POWER              8
88 #define PORT_LOWSPEED           9
89 #define PORT_HIGHSPEED          10
90 #define PORT_C_CONNECTION       16
91 #define PORT_C_ENABLE           17
92 #define PORT_C_SUSPEND          18
93 #define PORT_C_OVERCURRENT      19
94 #define PORT_C_RESET            20
95 #define PORT_TEST               21
96 #define PORT_INDICATOR          22
97 
98 /* same as Linux kernel root hubs */
99 
100 enum {
101     STR_MANUFACTURER = 1,
102     STR_PRODUCT,
103     STR_SERIALNUMBER,
104 };
105 
106 static const USBDescStrings desc_strings = {
107     [STR_MANUFACTURER] = "QEMU",
108     [STR_PRODUCT]      = "QEMU USB Hub",
109     [STR_SERIALNUMBER] = "314159",
110 };
111 
112 static const USBDescIface desc_iface_hub = {
113     .bInterfaceNumber              = 0,
114     .bNumEndpoints                 = 1,
115     .bInterfaceClass               = USB_CLASS_HUB,
116     .eps = (USBDescEndpoint[]) {
117         {
118             .bEndpointAddress      = USB_DIR_IN | 0x01,
119             .bmAttributes          = USB_ENDPOINT_XFER_INT,
120             .wMaxPacketSize        = 1 + DIV_ROUND_UP(MAX_PORTS, 8),
121             .bInterval             = 0xff,
122         },
123     }
124 };
125 
126 static const USBDescDevice desc_device_hub = {
127     .bcdUSB                        = 0x0110,
128     .bDeviceClass                  = USB_CLASS_HUB,
129     .bMaxPacketSize0               = 8,
130     .bNumConfigurations            = 1,
131     .confs = (USBDescConfig[]) {
132         {
133             .bNumInterfaces        = 1,
134             .bConfigurationValue   = 1,
135             .bmAttributes          = USB_CFG_ATT_ONE | USB_CFG_ATT_SELFPOWER |
136                                      USB_CFG_ATT_WAKEUP,
137             .nif = 1,
138             .ifs = &desc_iface_hub,
139         },
140     },
141 };
142 
143 static const USBDesc desc_hub = {
144     .id = {
145         .idVendor          = 0x0409,
146         .idProduct         = 0x55aa,
147         .bcdDevice         = 0x0101,
148         .iManufacturer     = STR_MANUFACTURER,
149         .iProduct          = STR_PRODUCT,
150         .iSerialNumber     = STR_SERIALNUMBER,
151     },
152     .full = &desc_device_hub,
153     .str  = desc_strings,
154 };
155 
156 static const uint8_t qemu_hub_hub_descriptor[] =
157 {
158         0x00,                   /*  u8  bLength; patched in later */
159         0x29,                   /*  u8  bDescriptorType; Hub-descriptor */
160         0x00,                   /*  u8  bNbrPorts; (patched later) */
161         0x0a,                   /* u16  wHubCharacteristics; */
162         0x00,                   /*   (per-port OC, no power switching) */
163         0x01,                   /*  u8  bPwrOn2pwrGood; 2ms */
164         0x00                    /*  u8  bHubContrCurrent; 0 mA */
165 
166         /* DeviceRemovable and PortPwrCtrlMask patched in later */
167 };
168 
169 static bool usb_hub_port_change(USBHubPort *port, uint16_t status)
170 {
171     bool notify = false;
172 
173     if (status & 0x1f) {
174         port->wPortChange |= status;
175         notify = true;
176     }
177     return notify;
178 }
179 
180 static bool usb_hub_port_set(USBHubPort *port, uint16_t status)
181 {
182     if (port->wPortStatus & status) {
183         return false;
184     }
185     port->wPortStatus |= status;
186     return usb_hub_port_change(port, status);
187 }
188 
189 static bool usb_hub_port_clear(USBHubPort *port, uint16_t status)
190 {
191     if (!(port->wPortStatus & status)) {
192         return false;
193     }
194     port->wPortStatus &= ~status;
195     return usb_hub_port_change(port, status);
196 }
197 
198 static bool usb_hub_port_update(USBHubPort *port)
199 {
200     bool notify = false;
201 
202     if (port->port.dev && port->port.dev->attached) {
203         notify = usb_hub_port_set(port, PORT_STAT_CONNECTION);
204         if (port->port.dev->speed == USB_SPEED_LOW) {
205             usb_hub_port_set(port, PORT_STAT_LOW_SPEED);
206         } else {
207             usb_hub_port_clear(port, PORT_STAT_LOW_SPEED);
208         }
209     }
210     return notify;
211 }
212 
213 static void usb_hub_port_update_timer(void *opaque)
214 {
215     USBHubState *s = opaque;
216     bool notify = false;
217     int i;
218 
219     for (i = 0; i < s->num_ports; i++) {
220         notify |= usb_hub_port_update(&s->ports[i]);
221     }
222     if (notify) {
223         usb_wakeup(s->intr, 0);
224     }
225 }
226 
227 static void usb_hub_attach(USBPort *port1)
228 {
229     USBHubState *s = port1->opaque;
230     USBHubPort *port = &s->ports[port1->index];
231 
232     trace_usb_hub_attach(s->dev.addr, port1->index + 1);
233     usb_hub_port_update(port);
234     usb_wakeup(s->intr, 0);
235 }
236 
237 static void usb_hub_detach(USBPort *port1)
238 {
239     USBHubState *s = port1->opaque;
240     USBHubPort *port = &s->ports[port1->index];
241 
242     trace_usb_hub_detach(s->dev.addr, port1->index + 1);
243     usb_wakeup(s->intr, 0);
244 
245     /* Let upstream know the device on this port is gone */
246     s->dev.port->ops->child_detach(s->dev.port, port1->dev);
247 
248     usb_hub_port_clear(port, PORT_STAT_CONNECTION);
249     usb_hub_port_clear(port, PORT_STAT_ENABLE);
250     usb_hub_port_clear(port, PORT_STAT_SUSPEND);
251     usb_wakeup(s->intr, 0);
252 }
253 
254 static void usb_hub_child_detach(USBPort *port1, USBDevice *child)
255 {
256     USBHubState *s = port1->opaque;
257 
258     /* Pass along upstream */
259     s->dev.port->ops->child_detach(s->dev.port, child);
260 }
261 
262 static void usb_hub_wakeup(USBPort *port1)
263 {
264     USBHubState *s = port1->opaque;
265     USBHubPort *port = &s->ports[port1->index];
266 
267     if (usb_hub_port_clear(port, PORT_STAT_SUSPEND)) {
268         usb_wakeup(s->intr, 0);
269     }
270 }
271 
272 static void usb_hub_complete(USBPort *port, USBPacket *packet)
273 {
274     USBHubState *s = port->opaque;
275 
276     /*
277      * Just pass it along upstream for now.
278      *
279      * If we ever implement usb 2.0 split transactions this will
280      * become a little more complicated ...
281      *
282      * Can't use usb_packet_complete() here because packet->owner is
283      * cleared already, go call the ->complete() callback directly
284      * instead.
285      */
286     s->dev.port->ops->complete(s->dev.port, packet);
287 }
288 
289 static USBDevice *usb_hub_find_device(USBDevice *dev, uint8_t addr)
290 {
291     USBHubState *s = USB_HUB(dev);
292     USBHubPort *port;
293     USBDevice *downstream;
294     int i;
295 
296     for (i = 0; i < s->num_ports; i++) {
297         port = &s->ports[i];
298         if (!(port->wPortStatus & PORT_STAT_ENABLE)) {
299             continue;
300         }
301         downstream = usb_find_device(&port->port, addr);
302         if (downstream != NULL) {
303             return downstream;
304         }
305     }
306     return NULL;
307 }
308 
309 static void usb_hub_handle_reset(USBDevice *dev)
310 {
311     USBHubState *s = USB_HUB(dev);
312     USBHubPort *port;
313     int i;
314 
315     trace_usb_hub_reset(s->dev.addr);
316     for (i = 0; i < s->num_ports; i++) {
317         port = s->ports + i;
318         port->wPortStatus = 0;
319         port->wPortChange = 0;
320         usb_hub_port_set(port, PORT_STAT_POWER);
321         usb_hub_port_update(port);
322     }
323 }
324 
325 static const char *feature_name(int feature)
326 {
327     static const char *name[] = {
328         [PORT_CONNECTION]    = "connection",
329         [PORT_ENABLE]        = "enable",
330         [PORT_SUSPEND]       = "suspend",
331         [PORT_OVERCURRENT]   = "overcurrent",
332         [PORT_RESET]         = "reset",
333         [PORT_POWER]         = "power",
334         [PORT_LOWSPEED]      = "lowspeed",
335         [PORT_HIGHSPEED]     = "highspeed",
336         [PORT_C_CONNECTION]  = "change-connection",
337         [PORT_C_ENABLE]      = "change-enable",
338         [PORT_C_SUSPEND]     = "change-suspend",
339         [PORT_C_OVERCURRENT] = "change-overcurrent",
340         [PORT_C_RESET]       = "change-reset",
341         [PORT_TEST]          = "test",
342         [PORT_INDICATOR]     = "indicator",
343     };
344     if (feature < 0 || feature >= ARRAY_SIZE(name)) {
345         return "?";
346     }
347     return name[feature] ?: "?";
348 }
349 
350 static void usb_hub_handle_control(USBDevice *dev, USBPacket *p,
351                int request, int value, int index, int length, uint8_t *data)
352 {
353     USBHubState *s = (USBHubState *)dev;
354     int ret;
355 
356     trace_usb_hub_control(s->dev.addr, request, value, index, length);
357 
358     ret = usb_desc_handle_control(dev, p, request, value, index, length, data);
359     if (ret >= 0) {
360         return;
361     }
362 
363     switch(request) {
364     case EndpointOutRequest | USB_REQ_CLEAR_FEATURE:
365         if (value == 0 && index != 0x81) { /* clear ep halt */
366             goto fail;
367         }
368         break;
369         /* usb specific requests */
370     case GetHubStatus:
371         data[0] = 0;
372         data[1] = 0;
373         data[2] = 0;
374         data[3] = 0;
375         p->actual_length = 4;
376         break;
377     case GetPortStatus:
378         {
379             unsigned int n = index - 1;
380             USBHubPort *port;
381             if (n >= s->num_ports) {
382                 goto fail;
383             }
384             port = &s->ports[n];
385             trace_usb_hub_get_port_status(s->dev.addr, index,
386                                           port->wPortStatus,
387                                           port->wPortChange);
388             data[0] = port->wPortStatus;
389             data[1] = port->wPortStatus >> 8;
390             data[2] = port->wPortChange;
391             data[3] = port->wPortChange >> 8;
392             p->actual_length = 4;
393         }
394         break;
395     case SetHubFeature:
396     case ClearHubFeature:
397         if (value != 0 && value != 1) {
398             goto fail;
399         }
400         break;
401     case SetPortFeature:
402         {
403             unsigned int n = index - 1;
404             USBHubPort *port;
405             USBDevice *pdev;
406 
407             trace_usb_hub_set_port_feature(s->dev.addr, index,
408                                            feature_name(value));
409 
410             if (n >= s->num_ports) {
411                 goto fail;
412             }
413             port = &s->ports[n];
414             pdev = port->port.dev;
415             switch(value) {
416             case PORT_SUSPEND:
417                 port->wPortStatus |= PORT_STAT_SUSPEND;
418                 break;
419             case PORT_RESET:
420                 usb_hub_port_set(port, PORT_STAT_RESET);
421                 usb_hub_port_clear(port, PORT_STAT_RESET);
422                 if (pdev && pdev->attached) {
423                     usb_device_reset(pdev);
424                     usb_hub_port_set(port, PORT_STAT_ENABLE);
425                 }
426                 usb_wakeup(s->intr, 0);
427                 break;
428             case PORT_POWER:
429                 if (s->port_power) {
430                     int64_t now = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
431                     usb_hub_port_set(port, PORT_STAT_POWER);
432                     timer_mod(s->port_timer, now + 5000000); /* 5 ms */
433                 }
434                 break;
435             default:
436                 goto fail;
437             }
438         }
439         break;
440     case ClearPortFeature:
441         {
442             unsigned int n = index - 1;
443             USBHubPort *port;
444 
445             trace_usb_hub_clear_port_feature(s->dev.addr, index,
446                                              feature_name(value));
447 
448             if (n >= s->num_ports) {
449                 goto fail;
450             }
451             port = &s->ports[n];
452             switch(value) {
453             case PORT_ENABLE:
454                 port->wPortStatus &= ~PORT_STAT_ENABLE;
455                 break;
456             case PORT_C_ENABLE:
457                 port->wPortChange &= ~PORT_STAT_C_ENABLE;
458                 break;
459             case PORT_SUSPEND:
460                 usb_hub_port_clear(port, PORT_STAT_SUSPEND);
461                 break;
462             case PORT_C_SUSPEND:
463                 port->wPortChange &= ~PORT_STAT_C_SUSPEND;
464                 break;
465             case PORT_C_CONNECTION:
466                 port->wPortChange &= ~PORT_STAT_C_CONNECTION;
467                 break;
468             case PORT_C_OVERCURRENT:
469                 port->wPortChange &= ~PORT_STAT_C_OVERCURRENT;
470                 break;
471             case PORT_C_RESET:
472                 port->wPortChange &= ~PORT_STAT_C_RESET;
473                 break;
474             case PORT_POWER:
475                 if (s->port_power) {
476                     usb_hub_port_clear(port, PORT_STAT_POWER);
477                     usb_hub_port_clear(port, PORT_STAT_CONNECTION);
478                     usb_hub_port_clear(port, PORT_STAT_ENABLE);
479                     usb_hub_port_clear(port, PORT_STAT_SUSPEND);
480                     port->wPortChange = 0;
481                 }
482             default:
483                 goto fail;
484             }
485         }
486         break;
487     case GetHubDescriptor:
488         {
489             unsigned int n, limit, var_hub_size = 0;
490             memcpy(data, qemu_hub_hub_descriptor,
491                    sizeof(qemu_hub_hub_descriptor));
492             data[2] = s->num_ports;
493 
494             if (s->port_power) {
495                 data[3] &= ~0x03;
496                 data[3] |= 0x01;
497             }
498 
499             /* fill DeviceRemovable bits */
500             limit = DIV_ROUND_UP(s->num_ports + 1, 8) + 7;
501             for (n = 7; n < limit; n++) {
502                 data[n] = 0x00;
503                 var_hub_size++;
504             }
505 
506             /* fill PortPwrCtrlMask bits */
507             limit = limit + DIV_ROUND_UP(s->num_ports, 8);
508             for (;n < limit; n++) {
509                 data[n] = 0xff;
510                 var_hub_size++;
511             }
512 
513             p->actual_length = sizeof(qemu_hub_hub_descriptor) + var_hub_size;
514             data[0] = p->actual_length;
515             break;
516         }
517     default:
518     fail:
519         p->status = USB_RET_STALL;
520         break;
521     }
522 }
523 
524 static void usb_hub_handle_data(USBDevice *dev, USBPacket *p)
525 {
526     USBHubState *s = (USBHubState *)dev;
527 
528     switch(p->pid) {
529     case USB_TOKEN_IN:
530         if (p->ep->nr == 1) {
531             USBHubPort *port;
532             unsigned int status;
533             uint8_t buf[4];
534             int i, n;
535             n = DIV_ROUND_UP(s->num_ports + 1, 8);
536             if (p->iov.size == 1) { /* FreeBSD workaround */
537                 n = 1;
538             } else if (n > p->iov.size) {
539                 p->status = USB_RET_BABBLE;
540                 return;
541             }
542             status = 0;
543             for (i = 0; i < s->num_ports; i++) {
544                 port = &s->ports[i];
545                 if (port->wPortChange)
546                     status |= (1 << (i + 1));
547             }
548             if (status != 0) {
549                 trace_usb_hub_status_report(s->dev.addr, status);
550                 for(i = 0; i < n; i++) {
551                     buf[i] = status >> (8 * i);
552                 }
553                 usb_packet_copy(p, buf, n);
554             } else {
555                 p->status = USB_RET_NAK; /* usb11 11.13.1 */
556             }
557         } else {
558             goto fail;
559         }
560         break;
561     case USB_TOKEN_OUT:
562     default:
563     fail:
564         p->status = USB_RET_STALL;
565         break;
566     }
567 }
568 
569 static void usb_hub_unrealize(USBDevice *dev)
570 {
571     USBHubState *s = (USBHubState *)dev;
572     int i;
573 
574     for (i = 0; i < s->num_ports; i++) {
575         usb_unregister_port(usb_bus_from_device(dev),
576                             &s->ports[i].port);
577     }
578 
579     timer_free(s->port_timer);
580 }
581 
582 static USBPortOps usb_hub_port_ops = {
583     .attach = usb_hub_attach,
584     .detach = usb_hub_detach,
585     .child_detach = usb_hub_child_detach,
586     .wakeup = usb_hub_wakeup,
587     .complete = usb_hub_complete,
588 };
589 
590 static void usb_hub_realize(USBDevice *dev, Error **errp)
591 {
592     USBHubState *s = USB_HUB(dev);
593     USBHubPort *port;
594     int i;
595 
596     if (s->num_ports < 1 || s->num_ports > MAX_PORTS) {
597         error_setg(errp, "num_ports (%d) out of range (1..%d)",
598                    s->num_ports, MAX_PORTS);
599         return;
600     }
601 
602     if (dev->port->hubcount == 5) {
603         error_setg(errp, "usb hub chain too deep");
604         return;
605     }
606 
607     usb_desc_create_serial(dev);
608     usb_desc_init(dev);
609     s->port_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL,
610                                  usb_hub_port_update_timer, s);
611     s->intr = usb_ep_get(dev, USB_TOKEN_IN, 1);
612     for (i = 0; i < s->num_ports; i++) {
613         port = &s->ports[i];
614         usb_register_port(usb_bus_from_device(dev),
615                           &port->port, s, i, &usb_hub_port_ops,
616                           USB_SPEED_MASK_LOW | USB_SPEED_MASK_FULL);
617         usb_port_location(&port->port, dev->port, i+1);
618     }
619     usb_hub_handle_reset(dev);
620 }
621 
622 static const VMStateDescription vmstate_usb_hub_port = {
623     .name = "usb-hub-port",
624     .version_id = 1,
625     .minimum_version_id = 1,
626     .fields = (const VMStateField[]) {
627         VMSTATE_UINT16(wPortStatus, USBHubPort),
628         VMSTATE_UINT16(wPortChange, USBHubPort),
629         VMSTATE_END_OF_LIST()
630     }
631 };
632 
633 static bool usb_hub_port_timer_needed(void *opaque)
634 {
635     USBHubState *s = opaque;
636 
637     return s->port_power;
638 }
639 
640 static const VMStateDescription vmstate_usb_hub_port_timer = {
641     .name = "usb-hub/port-timer",
642     .version_id = 1,
643     .minimum_version_id = 1,
644     .needed = usb_hub_port_timer_needed,
645     .fields = (const VMStateField[]) {
646         VMSTATE_TIMER_PTR(port_timer, USBHubState),
647         VMSTATE_END_OF_LIST()
648     },
649 };
650 
651 static const VMStateDescription vmstate_usb_hub = {
652     .name = "usb-hub",
653     .version_id = 1,
654     .minimum_version_id = 1,
655     .fields = (const VMStateField[]) {
656         VMSTATE_USB_DEVICE(dev, USBHubState),
657         VMSTATE_STRUCT_ARRAY(ports, USBHubState, MAX_PORTS, 0,
658                              vmstate_usb_hub_port, USBHubPort),
659         VMSTATE_END_OF_LIST()
660     },
661     .subsections = (const VMStateDescription * const []) {
662         &vmstate_usb_hub_port_timer,
663         NULL
664     }
665 };
666 
667 static Property usb_hub_properties[] = {
668     DEFINE_PROP_UINT32("ports", USBHubState, num_ports, 8),
669     DEFINE_PROP_BOOL("port-power", USBHubState, port_power, false),
670     DEFINE_PROP_END_OF_LIST(),
671 };
672 
673 static void usb_hub_class_initfn(ObjectClass *klass, void *data)
674 {
675     DeviceClass *dc = DEVICE_CLASS(klass);
676     USBDeviceClass *uc = USB_DEVICE_CLASS(klass);
677 
678     uc->realize        = usb_hub_realize;
679     uc->product_desc   = "QEMU USB Hub";
680     uc->usb_desc       = &desc_hub;
681     uc->find_device    = usb_hub_find_device;
682     uc->handle_reset   = usb_hub_handle_reset;
683     uc->handle_control = usb_hub_handle_control;
684     uc->handle_data    = usb_hub_handle_data;
685     uc->unrealize      = usb_hub_unrealize;
686     set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories);
687     dc->fw_name = "hub";
688     dc->vmsd = &vmstate_usb_hub;
689     device_class_set_props(dc, usb_hub_properties);
690 }
691 
692 static const TypeInfo hub_info = {
693     .name          = TYPE_USB_HUB,
694     .parent        = TYPE_USB_DEVICE,
695     .instance_size = sizeof(USBHubState),
696     .class_init    = usb_hub_class_initfn,
697 };
698 
699 static void usb_hub_register_types(void)
700 {
701     type_register_static(&hub_info);
702 }
703 
704 type_init(usb_hub_register_types)
705